globals.hpp revision 476:7b75310e57e2
1126288Smtm/*
298186Sgordon * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
378344Sobrien * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
498186Sgordon *
578344Sobrien * This code is free software; you can redistribute it and/or modify it
678344Sobrien * under the terms of the GNU General Public License version 2 only, as
778344Sobrien * published by the Free Software Foundation.
878344Sobrien *
978344Sobrien * This code is distributed in the hope that it will be useful, but WITHOUT
1078344Sobrien * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1178344Sobrien * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
1278344Sobrien * version 2 for more details (a copy is included in the LICENSE file that
1378344Sobrien * accompanied this code).
1478344Sobrien *
1578344Sobrien * You should have received a copy of the GNU General Public License version
1678344Sobrien * 2 along with this work; if not, write to the Free Software Foundation,
1778344Sobrien * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1878344Sobrien *
1978344Sobrien * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
2078344Sobrien * CA 95054 USA or visit www.sun.com if you need additional information or
2178344Sobrien * have any questions.
2278344Sobrien *
2378344Sobrien */
2478344Sobrien
2578344Sobrien#if !defined(COMPILER1) && !defined(COMPILER2)
2678344Sobriendefine_pd_global(bool, BackgroundCompilation,        false);
2778344Sobriendefine_pd_global(bool, UseTLAB,                      false);
2878344Sobriendefine_pd_global(bool, CICompileOSR,                 false);
2978344Sobriendefine_pd_global(bool, UseTypeProfile,               false);
3078344Sobriendefine_pd_global(bool, UseOnStackReplacement,        false);
3178344Sobriendefine_pd_global(bool, InlineIntrinsics,             false);
3278344Sobriendefine_pd_global(bool, PreferInterpreterNativeStubs, true);
3378344Sobriendefine_pd_global(bool, ProfileInterpreter,           false);
3478344Sobriendefine_pd_global(bool, ProfileTraps,                 false);
3578344Sobriendefine_pd_global(bool, TieredCompilation,            false);
3678344Sobrien
3778344Sobriendefine_pd_global(intx, CompileThreshold,             0);
3878344Sobriendefine_pd_global(intx, Tier2CompileThreshold,        0);
3978344Sobriendefine_pd_global(intx, Tier3CompileThreshold,        0);
4078344Sobriendefine_pd_global(intx, Tier4CompileThreshold,        0);
4178344Sobrien
4278344Sobriendefine_pd_global(intx, BackEdgeThreshold,            0);
4398186Sgordondefine_pd_global(intx, Tier2BackEdgeThreshold,       0);
4498186Sgordondefine_pd_global(intx, Tier3BackEdgeThreshold,       0);
4598186Sgordondefine_pd_global(intx, Tier4BackEdgeThreshold,       0);
46131550Scperciva
47131550Scpercivadefine_pd_global(intx, OnStackReplacePercentage,     0);
48131550Scpercivadefine_pd_global(bool, ResizeTLAB,                   false);
49131550Scpercivadefine_pd_global(intx, FreqInlineSize,               0);
5098186Sgordondefine_pd_global(intx, NewSizeThreadIncrease,        4*K);
5198186Sgordondefine_pd_global(intx, NewRatio,                     4);
5298186Sgordondefine_pd_global(intx, InlineClassNatives,           true);
53103018Sgordondefine_pd_global(intx, InlineUnsafeOps,              true);
54124832Smtmdefine_pd_global(intx, InitialCodeCacheSize,         160*K);
55124832Smtmdefine_pd_global(intx, ReservedCodeCacheSize,        32*M);
5698186Sgordondefine_pd_global(intx, CodeCacheExpansionSize,       32*K);
57103018Sgordondefine_pd_global(intx, CodeCacheMinBlockLength,      1);
5898186Sgordondefine_pd_global(uintx,PermSize,    ScaleForWordSize(4*M));
5998186Sgordondefine_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
6098186Sgordondefine_pd_global(bool, NeverActAsServerClassMachine, true);
6198186Sgordondefine_pd_global(uintx, DefaultMaxRAM,               1*G);
6298186Sgordon#define CI_COMPILER_COUNT 0
6398186Sgordon#else
6498186Sgordon
6598186Sgordon#ifdef COMPILER2
6698186Sgordon#define CI_COMPILER_COUNT 2
6778344Sobrien#else
6878344Sobrien#define CI_COMPILER_COUNT 1
6978344Sobrien#endif // COMPILER2
7078344Sobrien
7198186Sgordon#endif // no compilers
7298186Sgordon
7398186Sgordon
7498186Sgordon// string type aliases used only in this file
7598186Sgordontypedef const char* ccstr;
7698186Sgordontypedef const char* ccstrlist;   // represents string arguments which accumulate
7798186Sgordon
7898186Sgordonenum FlagValueOrigin {
7998186Sgordon  DEFAULT          = 0,
8098186Sgordon  COMMAND_LINE     = 1,
8198186Sgordon  ENVIRON_VAR      = 2,
8298186Sgordon  CONFIG_FILE      = 3,
8398186Sgordon  MANAGEMENT       = 4,
8498186Sgordon  ERGONOMIC        = 5,
8598186Sgordon  ATTACH_ON_DEMAND = 6,
8698186Sgordon  INTERNAL         = 99
8798186Sgordon};
88103018Sgordon
8998186Sgordonstruct Flag {
9098186Sgordon  const char *type;
9198186Sgordon  const char *name;
9298186Sgordon  void*       addr;
9398186Sgordon  const char *kind;
9498186Sgordon  FlagValueOrigin origin;
9598186Sgordon
9698186Sgordon  // points to all Flags static array
9798186Sgordon  static Flag *flags;
9898186Sgordon
9998186Sgordon  // number of flags
10098186Sgordon  static size_t numFlags;
10198186Sgordon
10298186Sgordon  static Flag* find_flag(char* name, size_t length);
10398186Sgordon
10498186Sgordon  bool is_bool() const        { return strcmp(type, "bool") == 0; }
10598186Sgordon  bool get_bool() const       { return *((bool*) addr); }
10698186Sgordon  void set_bool(bool value)   { *((bool*) addr) = value; }
10798186Sgordon
10898186Sgordon  bool is_intx()  const       { return strcmp(type, "intx")  == 0; }
10998186Sgordon  intx get_intx() const       { return *((intx*) addr); }
11098186Sgordon  void set_intx(intx value)   { *((intx*) addr) = value; }
11198186Sgordon
11298186Sgordon  bool is_uintx() const       { return strcmp(type, "uintx") == 0; }
11398186Sgordon  uintx get_uintx() const     { return *((uintx*) addr); }
11498186Sgordon  void set_uintx(uintx value) { *((uintx*) addr) = value; }
11598186Sgordon
11698186Sgordon  bool is_double() const        { return strcmp(type, "double") == 0; }
11798186Sgordon  double get_double() const     { return *((double*) addr); }
11898186Sgordon  void set_double(double value) { *((double*) addr) = value; }
11998186Sgordon
12098186Sgordon  bool is_ccstr() const          { return strcmp(type, "ccstr") == 0 || strcmp(type, "ccstrlist") == 0; }
12178344Sobrien  bool ccstr_accumulates() const { return strcmp(type, "ccstrlist") == 0; }
12278344Sobrien  ccstr get_ccstr() const     { return *((ccstr*) addr); }
12378344Sobrien  void set_ccstr(ccstr value) { *((ccstr*) addr) = value; }
12478344Sobrien
12578344Sobrien  bool is_unlocker() const;
12678344Sobrien  bool is_unlocked() const;
12778344Sobrien  bool is_writeable() const;
12898186Sgordon  bool is_external() const;
12978344Sobrien
13078344Sobrien  void print_on(outputStream* st);
13178344Sobrien  void print_as_flag(outputStream* st);
13278344Sobrien};
13378344Sobrien
13478344Sobrien// debug flags control various aspects of the VM and are global accessible
13578344Sobrien
13678344Sobrien// use FlagSetting to temporarily change some debug flag
13778344Sobrien// e.g. FlagSetting fs(DebugThisAndThat, true);
13878344Sobrien// restored to previous value upon leaving scope
13978344Sobrienclass FlagSetting {
14078344Sobrien  bool val;
141106643Sgordon  bool* flag;
14278344Sobrien public:
14378344Sobrien  FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; }
14478344Sobrien  ~FlagSetting()                       { *flag = val; }
14578344Sobrien};
14678344Sobrien
14798186Sgordon
14898186Sgordonclass CounterSetting {
14978344Sobrien  intx* counter;
15098186Sgordon public:
15198186Sgordon  CounterSetting(intx* cnt) { counter = cnt; (*counter)++; }
15298186Sgordon  ~CounterSetting()         { (*counter)--; }
153126286Smtm};
15498186Sgordon
15598186Sgordon
15698186Sgordonclass IntFlagSetting {
15798186Sgordon  intx val;
15898186Sgordon  intx* flag;
15978344Sobrien public:
16098186Sgordon  IntFlagSetting(intx& fl, intx newValue) { flag = &fl; val = fl; fl = newValue; }
16198186Sgordon  ~IntFlagSetting()                       { *flag = val; }
16298186Sgordon};
16398186Sgordon
16498186Sgordon
16578344Sobrienclass DoubleFlagSetting {
16678344Sobrien  double val;
16798186Sgordon  double* flag;
16878344Sobrien public:
16978344Sobrien  DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; }
170126285Smtm  ~DoubleFlagSetting()                           { *flag = val; }
17178344Sobrien};
17278344Sobrien
173126285Smtm
17478344Sobrienclass CommandLineFlags {
17578344Sobrien public:
176126285Smtm  static bool boolAt(char* name, size_t len, bool* value);
177126285Smtm  static bool boolAt(char* name, bool* value)      { return boolAt(name, strlen(name), value); }
178126285Smtm  static bool boolAtPut(char* name, size_t len, bool* value, FlagValueOrigin origin);
17978344Sobrien  static bool boolAtPut(char* name, bool* value, FlagValueOrigin origin)   { return boolAtPut(name, strlen(name), value, origin); }
18078344Sobrien
18198186Sgordon  static bool intxAt(char* name, size_t len, intx* value);
18278344Sobrien  static bool intxAt(char* name, intx* value)      { return intxAt(name, strlen(name), value); }
18378344Sobrien  static bool intxAtPut(char* name, size_t len, intx* value, FlagValueOrigin origin);
18478344Sobrien  static bool intxAtPut(char* name, intx* value, FlagValueOrigin origin)   { return intxAtPut(name, strlen(name), value, origin); }
18578344Sobrien
18698186Sgordon  static bool uintxAt(char* name, size_t len, uintx* value);
18798186Sgordon  static bool uintxAt(char* name, uintx* value)    { return uintxAt(name, strlen(name), value); }
18878344Sobrien  static bool uintxAtPut(char* name, size_t len, uintx* value, FlagValueOrigin origin);
18998186Sgordon  static bool uintxAtPut(char* name, uintx* value, FlagValueOrigin origin) { return uintxAtPut(name, strlen(name), value, origin); }
19098186Sgordon
19178344Sobrien  static bool doubleAt(char* name, size_t len, double* value);
19278344Sobrien  static bool doubleAt(char* name, double* value)    { return doubleAt(name, strlen(name), value); }
19378344Sobrien  static bool doubleAtPut(char* name, size_t len, double* value, FlagValueOrigin origin);
19478344Sobrien  static bool doubleAtPut(char* name, double* value, FlagValueOrigin origin) { return doubleAtPut(name, strlen(name), value, origin); }
19578344Sobrien
19698186Sgordon  static bool ccstrAt(char* name, size_t len, ccstr* value);
19778344Sobrien  static bool ccstrAt(char* name, ccstr* value)    { return ccstrAt(name, strlen(name), value); }
19898186Sgordon  static bool ccstrAtPut(char* name, size_t len, ccstr* value, FlagValueOrigin origin);
19978344Sobrien  static bool ccstrAtPut(char* name, ccstr* value, FlagValueOrigin origin) { return ccstrAtPut(name, strlen(name), value, origin); }
20078344Sobrien
201131061Smtm  // Returns false if name is not a command line flag.
20278344Sobrien  static bool wasSetOnCmdline(const char* name, bool* value);
20378344Sobrien  static void printSetFlags();
20478344Sobrien
20578344Sobrien  static void printFlags() PRODUCT_RETURN;
20698186Sgordon
20778344Sobrien  static void verify() PRODUCT_RETURN;
20878344Sobrien};
20998186Sgordon
21078344Sobrien// use this for flags that are true by default in the debug version but
21178344Sobrien// false in the optimized version, and vice versa
21278344Sobrien#ifdef ASSERT
21398186Sgordon#define trueInDebug  true
21478344Sobrien#define falseInDebug false
21598186Sgordon#else
21698186Sgordon#define trueInDebug  false
21778344Sobrien#define falseInDebug true
21878344Sobrien#endif
21978344Sobrien
22078344Sobrien// use this for flags that are true per default in the product build
22198186Sgordon// but false in development builds, and vice versa
22278344Sobrien#ifdef PRODUCT
22398186Sgordon#define trueInProduct  true
22478344Sobrien#define falseInProduct false
22598186Sgordon#else
22698186Sgordon#define trueInProduct  false
22798186Sgordon#define falseInProduct true
22898186Sgordon#endif
22998186Sgordon
23098186Sgordon// use this for flags that are true per default in the tiered build
23198186Sgordon// but false in non-tiered builds, and vice versa
23298186Sgordon#ifdef TIERED
23398186Sgordon#define  trueInTiered true
23498186Sgordon#define falseInTiered false
23598186Sgordon#else
23698186Sgordon#define  trueInTiered false
23798186Sgordon#define falseInTiered true
23898186Sgordon#endif
23998186Sgordon
24098186Sgordon// develop flags are settable / visible only during development and are constant in the PRODUCT version
24198186Sgordon// product flags are always settable / visible
24298186Sgordon// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version
24398186Sgordon
24498186Sgordon// A flag must be declared with one of the following types:
24598186Sgordon// bool, intx, uintx, ccstr.
24698186Sgordon// The type "ccstr" is an alias for "const char*" and is used
24798186Sgordon// only in this file, because the macrology requires single-token type names.
24898186Sgordon
24998186Sgordon// Note: Diagnostic options not meant for VM tuning or for product modes.
25098186Sgordon// They are to be used for VM quality assurance or field diagnosis
25198186Sgordon// of VM bugs.  They are hidden so that users will not be encouraged to
25298186Sgordon// try them as if they were VM ordinary execution options.  However, they
25398186Sgordon// are available in the product version of the VM.  Under instruction
25478344Sobrien// from support engineers, VM customers can turn them on to collect
25598186Sgordon// diagnostic information about VM problems.  To use a VM diagnostic
25698186Sgordon// option, you must first specify +UnlockDiagnosticVMOptions.
25798186Sgordon// (This master switch also affects the behavior of -Xprintflags.)
25898186Sgordon//
25998186Sgordon// experimental flags are in support of features that are not
26098186Sgordon//    part of the officially supported product, but are available
26178344Sobrien//    for experimenting with. They could, for example, be performance
26298186Sgordon//    features that may not have undergone full or rigorous QA, but which may
26398186Sgordon//    help performance in some cases and released for experimentation
26498186Sgordon//    by the community of users and developers. This flag also allows one to
26598186Sgordon//    be able to build a fully supported product that nonetheless also
26698186Sgordon//    ships with some unsupported, lightly tested, experimental features.
26798186Sgordon//    Like the UnlockDiagnosticVMOptions flag above, there is a corresponding
26898186Sgordon//    UnlockExperimentalVMOptions flag, which allows the control and
26998186Sgordon//    modification of the experimental flags.
27098186Sgordon//
27198186Sgordon// manageable flags are writeable external product flags.
27298186Sgordon//    They are dynamically writeable through the JDK management interface
27398186Sgordon//    (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole.
274126556Smtm//    These flags are external exported interface (see CCC).  The list of
27598186Sgordon//    manageable flags can be queried programmatically through the management
27698186Sgordon//    interface.
27798186Sgordon//
27898186Sgordon//    A flag can be made as "manageable" only if
27998186Sgordon//    - the flag is defined in a CCC as an external exported interface.
28098186Sgordon//    - the VM implementation supports dynamic setting of the flag.
28198186Sgordon//      This implies that the VM must *always* query the flag variable
28298186Sgordon//      and not reuse state related to the flag state at any given time.
28398186Sgordon//    - you want the flag to be queried programmatically by the customers.
28498186Sgordon//
28598186Sgordon// product_rw flags are writeable internal product flags.
286114272Smtm//    They are like "manageable" flags but for internal/private use.
28798186Sgordon//    The list of product_rw flags are internal/private flags which
28898186Sgordon//    may be changed/removed in a future release.  It can be set
28998186Sgordon//    through the management interface to get/set value
29098186Sgordon//    when the name of flag is supplied.
29198186Sgordon//
29298186Sgordon//    A flag can be made as "product_rw" only if
29398186Sgordon//    - the VM implementation supports dynamic setting of the flag.
29498186Sgordon//      This implies that the VM must *always* query the flag variable
29598186Sgordon//      and not reuse state related to the flag state at any given time.
296126286Smtm//
29798186Sgordon// Note that when there is a need to support develop flags to be writeable,
29898186Sgordon// it can be done in the same way as product_rw.
29998186Sgordon
30098186Sgordon#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product) \
30198186Sgordon                                                                            \
30298186Sgordon  lp64_product(bool, UseCompressedOops, false,                              \
30398186Sgordon            "Use 32-bit object references in 64-bit VM. "                   \
30498186Sgordon            "lp64_product means flag is always constant in 32 bit VM")      \
30598186Sgordon                                                                            \
30698186Sgordon  lp64_product(bool, CheckCompressedOops, trueInDebug,                      \
30798186Sgordon            "generate checks in encoding/decoding code")                    \
30898186Sgordon                                                                            \
30998186Sgordon  product(bool, UseImplicitNullCheckForNarrowOop, true,                     \
31078344Sobrien            "generate implicit null check in indexed addressing mode.")     \
31198186Sgordon                                                                            \
31298186Sgordon  /* UseMembar is theoretically a temp flag used for memory barrier         \
31398186Sgordon   * removal testing.  It was supposed to be removed before FCS but has     \
31498186Sgordon   * been re-added (see 6401008) */                                         \
31578344Sobrien  product(bool, UseMembar, false,                                           \
31698186Sgordon          "(Unstable) Issues membars on thread state transitions")          \
31798186Sgordon                                                                            \
31898186Sgordon  product(bool, PrintCommandLineFlags, false,                               \
31978344Sobrien          "Prints flags that appeared on the command line")                 \
32078344Sobrien                                                                            \
32178344Sobrien  diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug,                  \
32298186Sgordon          "Enable normal processing of flags relating to field diagnostics")\
32398186Sgordon                                                                            \
32498186Sgordon  experimental(bool, UnlockExperimentalVMOptions, false,                    \
32598186Sgordon          "Enable normal processing of flags relating to experimental features")\
32698186Sgordon                                                                            \
32778344Sobrien  product(bool, JavaMonitorsInStackTrace, true,                             \
32898186Sgordon          "Print info. about Java monitor locks when the stacks are dumped")\
32998186Sgordon                                                                            \
33078344Sobrien  product_pd(bool, UseLargePages,                                           \
33198186Sgordon          "Use large page memory")                                          \
33298186Sgordon                                                                            \
333126303Smtm  product_pd(bool, UseLargePagesIndividualAllocation,                       \
33478344Sobrien          "Allocate large pages individually for better affinity")          \
33578344Sobrien                                                                            \
33678344Sobrien  develop(bool, LargePagesIndividualAllocationInjectError, false,           \
33798186Sgordon          "Fail large pages individual allocation")                         \
33898186Sgordon                                                                            \
33978344Sobrien  develop(bool, TracePageSizes, false,                                      \
34078344Sobrien          "Trace page size selection and usage.")                           \
34178344Sobrien                                                                            \
34298186Sgordon  product(bool, UseNUMA, false,                                             \
34378344Sobrien          "Use NUMA if available")                                          \
34478344Sobrien                                                                            \
34578344Sobrien  product(bool, ForceNUMA, false,                                           \
34678344Sobrien          "Force NUMA optimizations on single-node/UMA systems")            \
34798186Sgordon                                                                            \
34898186Sgordon  product(intx, NUMAChunkResizeWeight, 20,                                  \
34998186Sgordon          "Percentage (0-100) used to weight the current sample when "      \
35078344Sobrien          "computing exponentially decaying average for "                   \
35178344Sobrien          "AdaptiveNUMAChunkSizing")                                        \
35298186Sgordon                                                                            \
35398186Sgordon  product(intx, NUMASpaceResizeRate, 1*G,                                   \
35498186Sgordon          "Do not reallocate more that this amount per collection")         \
35578344Sobrien                                                                            \
35698186Sgordon  product(bool, UseAdaptiveNUMAChunkSizing, true,                           \
35798186Sgordon          "Enable adaptive chunk sizing for NUMA")                          \
35878344Sobrien                                                                            \
35978344Sobrien  product(bool, NUMAStats, false,                                           \
36078344Sobrien          "Print NUMA stats in detailed heap information")                  \
36178344Sobrien                                                                            \
36298186Sgordon  product(intx, NUMAPageScanRate, 256,                                      \
36378344Sobrien          "Maximum number of pages to include in the page scan procedure")  \
36478344Sobrien                                                                            \
36578344Sobrien  product_pd(bool, NeedsDeoptSuspend,                                       \
36678344Sobrien          "True for register window machines (sparc/ia64)")                 \
36778344Sobrien                                                                            \
36878344Sobrien  product(intx, UseSSE, 99,                                                 \
36978344Sobrien          "Highest supported SSE instructions set on x86/x64")              \
37078344Sobrien                                                                            \
37178344Sobrien  product(uintx, LargePageSizeInBytes, 0,                                   \
37278344Sobrien          "Large page size (0 to let VM choose the page size")              \
37378344Sobrien                                                                            \
37478344Sobrien  product(uintx, LargePageHeapSizeThreshold, 128*M,                         \
37598186Sgordon          "Use large pages if max heap is at least this big")               \
37678344Sobrien                                                                            \
37778344Sobrien  product(bool, ForceTimeHighResolution, false,                             \
37898186Sgordon          "Using high time resolution(For Win32 only)")                     \
37978344Sobrien                                                                            \
38098186Sgordon  develop(bool, TraceItables, false,                                        \
38198186Sgordon          "Trace initialization and use of itables")                        \
38298186Sgordon                                                                            \
38378344Sobrien  develop(bool, TracePcPatching, false,                                     \
38498186Sgordon          "Trace usage of frame::patch_pc")                                 \
38578344Sobrien                                                                            \
38678344Sobrien  develop(bool, TraceJumps, false,                                          \
38798186Sgordon          "Trace assembly jumps in thread ring buffer")                     \
38898186Sgordon                                                                            \
38998186Sgordon  develop(bool, TraceRelocator, false,                                      \
39098186Sgordon          "Trace the bytecode relocator")                                   \
39178344Sobrien                                                                            \
39298186Sgordon  develop(bool, TraceLongCompiles, false,                                   \
39378344Sobrien          "Print out every time compilation is longer than "                \
39498186Sgordon          "a given threashold")                                             \
39598186Sgordon                                                                            \
39698186Sgordon  develop(bool, SafepointALot, false,                                       \
39798186Sgordon          "Generates a lot of safepoints. Works with "                      \
39878344Sobrien          "GuaranteedSafepointInterval")                                    \
39978344Sobrien                                                                            \
40078344Sobrien  product_pd(bool, BackgroundCompilation,                                   \
40178344Sobrien          "A thread requesting compilation is not blocked during "          \
40278344Sobrien          "compilation")                                                    \
40378344Sobrien                                                                            \
40478344Sobrien  product(bool, PrintVMQWaitTime, false,                                    \
40578344Sobrien          "Prints out the waiting time in VM operation queue")              \
40678344Sobrien                                                                            \
40778344Sobrien  develop(bool, BailoutToInterpreterForThrows, false,                       \
40878344Sobrien          "Compiled methods which throws/catches exceptions will be "       \
40978344Sobrien          "deopt and intp.")                                                \
41098186Sgordon                                                                            \
41198186Sgordon  develop(bool, NoYieldsInMicrolock, false,                                 \
41278344Sobrien          "Disable yields in microlock")                                    \
41398186Sgordon                                                                            \
41498186Sgordon  develop(bool, TraceOopMapGeneration, false,                               \
41578344Sobrien          "Shows oopmap generation")                                        \
41678344Sobrien                                                                            \
41778344Sobrien  product(bool, MethodFlushing, true,                                       \
41878344Sobrien          "Reclamation of zombie and not-entrant methods")                  \
41998186Sgordon                                                                            \
42078344Sobrien  develop(bool, VerifyStack, false,                                         \
42198186Sgordon          "Verify stack of each thread when it is entering a runtime call") \
42298186Sgordon                                                                            \
42398186Sgordon  develop(bool, ForceUnreachable, false,                                    \
42498186Sgordon          "(amd64) Make all non code cache addresses to be unreachable with rip-rel forcing use of 64bit literal fixups") \
42578344Sobrien                                                                            \
42698186Sgordon  notproduct(bool, StressDerivedPointers, false,                            \
42798186Sgordon          "Force scavenge when a derived pointers is detected on stack "    \
42878344Sobrien          "after rtm call")                                                 \
42978344Sobrien                                                                            \
43078344Sobrien  develop(bool, TraceDerivedPointers, false,                                \
43178344Sobrien          "Trace traversal of derived pointers on stack")                   \
43298186Sgordon                                                                            \
43378344Sobrien  notproduct(bool, TraceCodeBlobStacks, false,                              \
43498186Sgordon          "Trace stack-walk of codeblobs")                                  \
43598186Sgordon                                                                            \
43698186Sgordon  product(bool, PrintJNIResolving, false,                                   \
43798186Sgordon          "Used to implement -v:jni")                                       \
43898186Sgordon                                                                            \
43998186Sgordon  notproduct(bool, PrintRewrites, false,                                    \
44098186Sgordon          "Print methods that are being rewritten")                         \
44198186Sgordon                                                                            \
44298186Sgordon  product(bool, UseInlineCaches, true,                                      \
443126303Smtm          "Use Inline Caches for virtual calls ")                           \
44498186Sgordon                                                                            \
44598186Sgordon  develop(bool, InlineArrayCopy, true,                                      \
44698186Sgordon          "inline arraycopy native that is known to be part of "            \
44798186Sgordon          "base library DLL")                                               \
44898186Sgordon                                                                            \
44998186Sgordon  develop(bool, InlineObjectHash, true,                                     \
45098186Sgordon          "inline Object::hashCode() native that is known to be part "      \
45198186Sgordon          "of base library DLL")                                            \
45298186Sgordon                                                                            \
45398186Sgordon  develop(bool, InlineObjectCopy, true,                                     \
45498186Sgordon          "inline Object.clone and Arrays.copyOf[Range] intrinsics")        \
45598186Sgordon                                                                            \
45698186Sgordon  develop(bool, InlineNatives, true,                                        \
45798186Sgordon          "inline natives that are known to be part of base library DLL")   \
45878344Sobrien                                                                            \
45978344Sobrien  develop(bool, InlineMathNatives, true,                                    \
460116097Smtm          "inline SinD, CosD, etc.")                                        \
46198186Sgordon                                                                            \
46278344Sobrien  develop(bool, InlineClassNatives, true,                                   \
46398186Sgordon          "inline Class.isInstance, etc")                                   \
46478344Sobrien                                                                            \
46578344Sobrien  develop(bool, InlineAtomicLong, true,                                     \
466132892Smtm          "inline sun.misc.AtomicLong")                                     \
467132892Smtm                                                                            \
468132892Smtm  develop(bool, InlineThreadNatives, true,                                  \
469132892Smtm          "inline Thread.currentThread, etc")                               \
470132892Smtm                                                                            \
471132892Smtm  develop(bool, InlineReflectionGetCallerClass, true,                       \
472126303Smtm          "inline sun.reflect.Reflection.getCallerClass(), known to be part "\
47398186Sgordon          "of base library DLL")                                            \
47478344Sobrien                                                                            \
47598186Sgordon  develop(bool, InlineUnsafeOps, true,                                      \
47698186Sgordon          "inline memory ops (native methods) from sun.misc.Unsafe")        \
47778344Sobrien                                                                            \
478126303Smtm  develop(bool, ConvertCmpD2CmpF, true,                                     \
47998186Sgordon          "Convert cmpD to cmpF when one input is constant in float range") \
480126303Smtm                                                                            \
481126303Smtm  develop(bool, ConvertFloat2IntClipping, true,                             \
48278344Sobrien          "Convert float2int clipping idiom to integer clipping")           \
48378344Sobrien                                                                            \
48478344Sobrien  develop(bool, SpecialStringCompareTo, true,                               \
48578344Sobrien          "special version of string compareTo")                            \
486126303Smtm                                                                            \
487126303Smtm  develop(bool, SpecialStringIndexOf, true,                                 \
488126303Smtm          "special version of string indexOf")                              \
489126303Smtm                                                                            \
490126303Smtm  product(bool, SpecialArraysEquals, false,                                 \
491126303Smtm          "special version of Arrays.equals(char[],char[])")                \
492126303Smtm                                                                            \
49378344Sobrien  develop(bool, TraceCallFixup, false,                                      \
49478344Sobrien          "traces all call fixups")                                         \
49598186Sgordon                                                                            \
49698186Sgordon  develop(bool, DeoptimizeALot, false,                                      \
49798186Sgordon          "deoptimize at every exit from the runtime system")               \
49898186Sgordon                                                                            \
49998186Sgordon  notproduct(ccstrlist, DeoptimizeOnlyAt, "",                               \
50078344Sobrien          "a comma separated list of bcis to deoptimize at")                \
50198186Sgordon                                                                            \
50278344Sobrien  product(bool, DeoptimizeRandom, false,                                    \
50398186Sgordon          "deoptimize random frames on random exit from the runtime system")\
50498186Sgordon                                                                            \
505131135Smtm  notproduct(bool, ZombieALot, false,                                       \
506131135Smtm          "creates zombies (non-entrant) at exit from the runt. system")    \
50778344Sobrien                                                                            \
50898186Sgordon  notproduct(bool, WalkStackALot, false,                                    \
50998186Sgordon          "trace stack (no print) at every exit from the runtime system")   \
51098186Sgordon                                                                            \
51178344Sobrien  develop(bool, Debugging, false,                                           \
51278344Sobrien          "set when executing debug methods in debug.ccp "                  \
51398186Sgordon          "(to prevent triggering assertions)")                             \
51478344Sobrien                                                                            \
51578344Sobrien  notproduct(bool, StrictSafepointChecks, trueInDebug,                      \
51678344Sobrien          "Enable strict checks that safepoints cannot happen for threads " \
51798186Sgordon          "that used No_Safepoint_Verifier")                                \
51878344Sobrien                                                                            \
51978344Sobrien  notproduct(bool, VerifyLastFrame, false,                                  \
52078344Sobrien          "Verify oops on last frame on entry to VM")                       \
52178344Sobrien                                                                            \
52298186Sgordon  develop(bool, TraceHandleAllocation, false,                               \
52378344Sobrien          "Prints out warnings when suspicious many handles are allocated") \
52498186Sgordon                                                                            \
52578344Sobrien  product(bool, UseCompilerSafepoints, true,                                \
52698186Sgordon          "Stop at safepoints in compiled code")                            \
52798186Sgordon                                                                            \
52898186Sgordon  product(bool, UseSplitVerifier, true,                                     \
52978344Sobrien          "use split verifier with StackMapTable attributes")               \
53098186Sgordon                                                                            \
531124832Smtm  product(bool, FailOverToOldVerifier, true,                                \
53298186Sgordon          "fail over to old verifier when split verifier fails")            \
53398186Sgordon                                                                            \
53498186Sgordon  develop(bool, ShowSafepointMsgs, false,                                   \
53598186Sgordon          "Show msg. about safepoint synch.")                               \
53678344Sobrien                                                                            \
53798186Sgordon  product(bool, SafepointTimeout, false,                                    \
53878344Sobrien          "Time out and warn or fail after SafepointTimeoutDelay "          \
53978344Sobrien          "milliseconds if failed to reach safepoint")                      \
54078344Sobrien                                                                            \
54198186Sgordon  develop(bool, DieOnSafepointTimeout, false,                               \
54278344Sobrien          "Die upon failure to reach safepoint (see SafepointTimeout)")     \
54378344Sobrien                                                                            \
54478344Sobrien  /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */      \
54578344Sobrien  /* typically, at most a few retries are needed */                         \
54678344Sobrien  product(intx, SuspendRetryCount, 50,                                      \
54778344Sobrien          "Maximum retry count for an external suspend request")            \
54878344Sobrien                                                                            \
54978344Sobrien  product(intx, SuspendRetryDelay, 5,                                       \
55098186Sgordon          "Milliseconds to delay per retry (* current_retry_count)")        \
55178344Sobrien                                                                            \
55278344Sobrien  product(bool, AssertOnSuspendWaitFailure, false,                          \
55378344Sobrien          "Assert/Guarantee on external suspend wait failure")              \
55478344Sobrien                                                                            \
55578344Sobrien  product(bool, TraceSuspendWaitFailures, false,                            \
55678344Sobrien          "Trace external suspend wait failures")                           \
55798186Sgordon                                                                            \
55898186Sgordon  product(bool, MaxFDLimit, true,                                           \
55978344Sobrien          "Bump the number of file descriptors to max in solaris.")         \
56078344Sobrien                                                                            \
56178344Sobrien  notproduct(bool, LogEvents, trueInDebug,                                  \
56278344Sobrien          "Enable Event log")                                               \
563116097Smtm                                                                            \
564116097Smtm  product(bool, BytecodeVerificationRemote, true,                           \
565132892Smtm          "Enables the Java bytecode verifier for remote classes")          \
566116097Smtm                                                                            \
567116097Smtm  product(bool, BytecodeVerificationLocal, false,                           \
568116097Smtm          "Enables the Java bytecode verifier for local classes")           \
56978344Sobrien                                                                            \
57078344Sobrien  develop(bool, ForceFloatExceptions, trueInDebug,                          \
571116097Smtm          "Force exceptions on FP stack under/overflow")                    \
572116097Smtm                                                                            \
573132892Smtm  develop(bool, SoftMatchFailure, trueInProduct,                            \
574116097Smtm          "If the DFA fails to match a node, print a message and bail out") \
575116097Smtm                                                                            \
576116097Smtm  develop(bool, VerifyStackAtCalls, false,                                  \
57798186Sgordon          "Verify that the stack pointer is unchanged after calls")         \
578109582Smtm                                                                            \
579116097Smtm  develop(bool, TraceJavaAssertions, false,                                 \
580116097Smtm          "Trace java language assertions")                                 \
581132892Smtm                                                                            \
582116097Smtm  notproduct(bool, CheckAssertionStatusDirectives, false,                   \
583116097Smtm          "temporary - see javaClasses.cpp")                                \
584116097Smtm                                                                            \
58578344Sobrien  notproduct(bool, PrintMallocFree, false,                                  \
58678344Sobrien          "Trace calls to C heap malloc/free allocation")                   \
58798186Sgordon                                                                            \
58878344Sobrien  notproduct(bool, PrintOopAddress, false,                                  \
58978344Sobrien          "Always print the location of the oop")                           \
59098186Sgordon                                                                            \
59198186Sgordon  notproduct(bool, VerifyCodeCacheOften, false,                             \
59278344Sobrien          "Verify compiled-code cache often")                               \
59378344Sobrien                                                                            \
59478344Sobrien  develop(bool, ZapDeadCompiledLocals, false,                               \
59578344Sobrien          "Zap dead locals in compiler frames")                             \
59678344Sobrien                                                                            \
59778344Sobrien  notproduct(bool, ZapDeadLocalsOld, false,                                 \
59878344Sobrien          "Zap dead locals (old version, zaps all frames when "             \
599131135Smtm          "entering the VM")                                                \
60098186Sgordon                                                                            \
60178344Sobrien  notproduct(bool, CheckOopishValues, false,                                \
60278344Sobrien          "Warn if value contains oop ( requires ZapDeadLocals)")           \
60378344Sobrien                                                                            \
604126287Smtm  develop(bool, UseMallocOnly, false,                                       \
60598186Sgordon          "use only malloc/free for allocation (no resource area/arena)")   \
60678344Sobrien                                                                            \
60778344Sobrien  develop(bool, PrintMalloc, false,                                         \
60878344Sobrien          "print all malloc/free calls")                                    \
60978344Sobrien                                                                            \
61078344Sobrien  develop(bool, ZapResourceArea, trueInDebug,                               \
61178344Sobrien          "Zap freed resource/arena space with 0xABABABAB")                 \
61278344Sobrien                                                                            \
61378344Sobrien  notproduct(bool, ZapVMHandleArea, trueInDebug,                            \
61478344Sobrien          "Zap freed VM handle space with 0xBCBCBCBC")                      \
61598186Sgordon                                                                            \
61678344Sobrien  develop(bool, ZapJNIHandleArea, trueInDebug,                              \
61778344Sobrien          "Zap freed JNI handle space with 0xFEFEFEFE")                     \
61878344Sobrien                                                                            \
61978344Sobrien  develop(bool, ZapUnusedHeapArea, trueInDebug,                             \
62078344Sobrien          "Zap unused heap space with 0xBAADBABE")                          \
62178344Sobrien                                                                            \
62278344Sobrien  develop(bool, TraceZapUnusedHeapArea, false,                              \
62398186Sgordon          "Trace zapping of unused heap space")                             \
62478344Sobrien                                                                            \
62578344Sobrien  develop(bool, CheckZapUnusedHeapArea, false,                              \
62678344Sobrien          "Check zapping of unused heap space")                             \
62778344Sobrien                                                                            \
62878344Sobrien  develop(bool, PrintVMMessages, true,                                      \
62978344Sobrien          "Print vm messages on console")                                   \
63078344Sobrien                                                                            \
63198186Sgordon  product(bool, PrintGCApplicationConcurrentTime, false,                    \
63278344Sobrien          "Print the time the application has been running")                \
63378344Sobrien                                                                            \
63478344Sobrien  product(bool, PrintGCApplicationStoppedTime, false,                       \
63578344Sobrien          "Print the time the application has been stopped")                \
63678344Sobrien                                                                            \
63778344Sobrien  develop(bool, Verbose, false,                                             \
63878344Sobrien          "Prints additional debugging information from other modes")       \
63978344Sobrien                                                                            \
640116097Smtm  develop(bool, PrintMiscellaneous, false,                                  \
641116097Smtm          "Prints uncategorized debugging information (requires +Verbose)") \
642116097Smtm                                                                            \
643116097Smtm  develop(bool, WizardMode, false,                                          \
644116097Smtm          "Prints much more debugging information")                         \
645116097Smtm                                                                            \
64678344Sobrien  product(bool, ShowMessageBoxOnError, false,                               \
64778344Sobrien          "Keep process alive on VM fatal error")                           \
64878344Sobrien                                                                            \
64978344Sobrien  product_pd(bool, UseOSErrorReporting,                                     \
65078344Sobrien          "Let VM fatal error propagate to the OS (ie. WER on Windows)")    \
65178344Sobrien                                                                            \
65278344Sobrien  product(bool, SuppressFatalErrorMessage, false,                           \
65378344Sobrien          "Do NO Fatal Error report [Avoid deadlock]")                      \
65478344Sobrien                                                                            \
65598186Sgordon  product(ccstrlist, OnError, "",                                           \
65678344Sobrien          "Run user-defined commands on fatal error; see VMError.cpp "      \
65778344Sobrien          "for examples")                                                   \
65878344Sobrien                                                                            \
65978344Sobrien  product(ccstrlist, OnOutOfMemoryError, "",                                \
66098186Sgordon          "Run user-defined commands on first java.lang.OutOfMemoryError")  \
66198186Sgordon                                                                            \
66298186Sgordon  manageable(bool, HeapDumpOnOutOfMemoryError, false,                       \
66398186Sgordon          "Dump heap to file when java.lang.OutOfMemoryError is thrown")    \
66478344Sobrien                                                                            \
66598186Sgordon  manageable(ccstr, HeapDumpPath, NULL,                                     \
66698186Sgordon          "When HeapDumpOnOutOfMemoryError is on, the path (filename or"    \
66798186Sgordon          "directory) of the dump file (defaults to java_pid<pid>.hprof"    \
66898186Sgordon          "in the working directory)")                                      \
66998186Sgordon                                                                            \
670116097Smtm  develop(uintx, SegmentedHeapDumpThreshold, 2*G,                           \
671116097Smtm          "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) "     \
672116097Smtm          "when the heap usage is larger than this")                        \
67398186Sgordon                                                                            \
67498186Sgordon  develop(uintx, HeapDumpSegmentSize, 1*G,                                  \
67598186Sgordon          "Approximate segment size when generating a segmented heap dump") \
676116097Smtm                                                                            \
677116097Smtm  develop(bool, BreakAtWarning, false,                                      \
678116097Smtm          "Execute breakpoint upon encountering VM warning")                \
679116097Smtm                                                                            \
68078344Sobrien  product_pd(bool, UseVectoredExceptions,                                   \
68178344Sobrien          "Temp Flag - Use Vectored Exceptions rather than SEH (Windows Only)") \
68278344Sobrien                                                                            \
68398186Sgordon  develop(bool, TraceVMOperation, false,                                    \
684131135Smtm          "Trace vm operations")                                            \
68578344Sobrien                                                                            \
68678344Sobrien  develop(bool, UseFakeTimers, false,                                       \
68778344Sobrien          "Tells whether the VM should use system time or a fake timer")    \
68878344Sobrien                                                                            \
68978344Sobrien  diagnostic(bool, LogCompilation, false,                                   \
69078344Sobrien          "Log compilation activity in detail to hotspot.log or LogFile")   \
69178344Sobrien                                                                            \
69278344Sobrien  product(bool, PrintCompilation, false,                                    \
69378344Sobrien          "Print compilations")                                             \
69498186Sgordon                                                                            \
69598186Sgordon  diagnostic(bool, TraceNMethodInstalls, false,                             \
69698186Sgordon             "Trace nmethod intallation")                                   \
697117977Smtm                                                                            \
698116097Smtm  diagnostic(bool, TraceOSRBreakpoint, false,                               \
699116097Smtm             "Trace OSR Breakpoint ")                                       \
700116097Smtm                                                                            \
701116097Smtm  diagnostic(bool, TraceCompileTriggered, false,                            \
70278344Sobrien             "Trace compile triggered")                                     \
70398186Sgordon                                                                            \
70498186Sgordon  diagnostic(bool, TraceTriggers, false,                                    \
70598186Sgordon             "Trace triggers")                                              \
70678344Sobrien                                                                            \
70798186Sgordon  product(bool, AlwaysRestoreFPU, false,                                    \
70898186Sgordon          "Restore the FPU control word after every JNI call (expensive)")  \
70998186Sgordon                                                                            \
71098186Sgordon  notproduct(bool, PrintCompilation2, false,                                \
71198186Sgordon          "Print additional statistics per compilation")                    \
71298186Sgordon                                                                            \
71398186Sgordon  diagnostic(bool, PrintAdapterHandlers, false,                             \
71498186Sgordon          "Print code generated for i2c/c2i adapters")                      \
715116097Smtm                                                                            \
716116097Smtm  diagnostic(bool, PrintAssembly, false,                                    \
717116097Smtm          "Print assembly code (using external disassembler.so)")           \
71898186Sgordon                                                                            \
71998186Sgordon  diagnostic(ccstr, PrintAssemblyOptions, NULL,                             \
72098186Sgordon          "Options string passed to disassembler.so")                       \
72198186Sgordon                                                                            \
722116097Smtm  diagnostic(bool, PrintNMethods, false,                                    \
723116097Smtm          "Print assembly code for nmethods when generated")                \
724116097Smtm                                                                            \
725116097Smtm  diagnostic(bool, PrintNativeNMethods, false,                              \
72678344Sobrien          "Print assembly code for native nmethods when generated")         \
72778344Sobrien                                                                            \
72878344Sobrien  develop(bool, PrintDebugInfo, false,                                      \
72998186Sgordon          "Print debug information for all nmethods when generated")        \
73078344Sobrien                                                                            \
73178344Sobrien  develop(bool, PrintRelocations, false,                                    \
73278344Sobrien          "Print relocation information for all nmethods when generated")   \
73378344Sobrien                                                                            \
73478344Sobrien  develop(bool, PrintDependencies, false,                                   \
73578344Sobrien          "Print dependency information for all nmethods when generated")   \
73678344Sobrien                                                                            \
73778344Sobrien  develop(bool, PrintExceptionHandlers, false,                              \
73878344Sobrien          "Print exception handler tables for all nmethods when generated") \
739116097Smtm                                                                            \
740116097Smtm  develop(bool, InterceptOSException, false,                                \
741116097Smtm          "Starts debugger when an implicit OS (e.g., NULL) "               \
742116097Smtm          "exception happens")                                              \
743116097Smtm                                                                            \
74478344Sobrien  notproduct(bool, PrintCodeCache, false,                                   \
74598186Sgordon          "Print the compiled_code cache when exiting")                     \
74698186Sgordon                                                                            \
74798186Sgordon  develop(bool, PrintCodeCache2, false,                                     \
74898186Sgordon          "Print detailed info on the compiled_code cache when exiting")    \
749116097Smtm                                                                            \
750116097Smtm  diagnostic(bool, PrintStubCode, false,                                    \
751116097Smtm          "Print generated stub code")                                      \
752116097Smtm                                                                            \
753116097Smtm  product(bool, StackTraceInThrowable, true,                                \
754116097Smtm          "Collect backtrace in throwable when exception happens")          \
75598186Sgordon                                                                            \
75678344Sobrien  product(bool, OmitStackTraceInFastThrow, true,                            \
75778344Sobrien          "Omit backtraces for some 'hot' exceptions in optimized code")    \
75878344Sobrien                                                                            \
759116097Smtm  product(bool, ProfilerPrintByteCodeStatistics, false,                     \
760132892Smtm          "Prints byte code statictics when dumping profiler output")       \
761116097Smtm                                                                            \
762116097Smtm  product(bool, ProfilerRecordPC, false,                                    \
763116097Smtm          "Collects tick for each 16 byte interval of compiled code")       \
76478344Sobrien                                                                            \
76578344Sobrien  product(bool, ProfileVM,  false,                                          \
76678344Sobrien          "Profiles ticks that fall within VM (either in the VM Thread "    \
76778344Sobrien          "or VM code called through stubs)")                               \
768126285Smtm                                                                            \
76978344Sobrien  product(bool, ProfileIntervals, false,                                    \
77078344Sobrien          "Prints profiles for each interval (see ProfileIntervalsTicks)")  \
771126285Smtm                                                                            \
77278344Sobrien  notproduct(bool, ProfilerCheckIntervals, false,                           \
773132892Smtm          "Collect and print info on spacing of profiler ticks")            \
774132892Smtm                                                                            \
77598186Sgordon  develop(bool, PrintJVMWarnings, false,                                    \
776116097Smtm          "Prints warnings for unimplemented JVM functions")                \
777132892Smtm                                                                            \
778116097Smtm  notproduct(uintx, WarnOnStalledSpinLock, 0,                               \
779116097Smtm          "Prints warnings for stalled SpinLocks")                          \
78078344Sobrien                                                                            \
78178344Sobrien  develop(bool, InitializeJavaLangSystem, true,                             \
78298186Sgordon          "Initialize java.lang.System - turn off for individual "          \
78398186Sgordon          "method debugging")                                               \
78498186Sgordon                                                                            \
78598186Sgordon  develop(bool, InitializeJavaLangString, true,                             \
78698186Sgordon          "Initialize java.lang.String - turn off for individual "          \
78798186Sgordon          "method debugging")                                               \
78878344Sobrien                                                                            \
78978344Sobrien  develop(bool, InitializeJavaLangExceptionsErrors, true,                   \
79078344Sobrien          "Initialize various error and exception classes - turn off for "  \
79178344Sobrien          "individual method debugging")                                    \
79278344Sobrien                                                                            \
79378344Sobrien  product(bool, RegisterFinalizersAtInit, true,                             \
79478344Sobrien          "Register finalizable objects at end of Object.<init> or "        \
79578344Sobrien          "after allocation.")                                              \
79678344Sobrien                                                                            \
79778344Sobrien  develop(bool, RegisterReferences, true,                                   \
79878344Sobrien          "Tells whether the VM should register soft/weak/final/phantom "   \
79978344Sobrien          "references")                                                     \
80078344Sobrien                                                                            \
80178344Sobrien  develop(bool, IgnoreRewrites, false,                                      \
80278344Sobrien          "Supress rewrites of bytecodes in the oopmap generator. "         \
80378344Sobrien          "This is unsafe!")                                                \
804116097Smtm                                                                            \
80578344Sobrien  develop(bool, PrintCodeCacheExtension, false,                             \
80678344Sobrien          "Print extension of code cache")                                  \
80798186Sgordon                                                                            \
80878344Sobrien  develop(bool, UsePrivilegedStack, true,                                   \
80978344Sobrien          "Enable the security JVM functions")                              \
81078344Sobrien                                                                            \
81178344Sobrien  develop(bool, IEEEPrecision, true,                                        \
81278344Sobrien          "Enables IEEE precision (for INTEL only)")                        \
81378344Sobrien                                                                            \
81478344Sobrien  develop(bool, ProtectionDomainVerification, true,                         \
81578344Sobrien          "Verifies protection domain before resolution in system "         \
81698186Sgordon          "dictionary")                                                     \
81798186Sgordon                                                                            \
81898186Sgordon  product(bool, ClassUnloading, true,                                       \
81978344Sobrien          "Do unloading of classes")                                        \
82078344Sobrien                                                                            \
82178344Sobrien  diagnostic(bool, LinkWellKnownClasses, false,                             \
82278344Sobrien          "Resolve a well known class as soon as its name is seen")         \
82378344Sobrien                                                                            \
82478344Sobrien  develop(bool, DisableStartThread, false,                                  \
82578344Sobrien          "Disable starting of additional Java threads "                    \
82678344Sobrien          "(for debugging only)")                                           \
82778344Sobrien                                                                            \
82898186Sgordon  develop(bool, MemProfiling, false,                                        \
82998186Sgordon          "Write memory usage profiling to log file")                       \
83098186Sgordon                                                                            \
83198186Sgordon  notproduct(bool, PrintSystemDictionaryAtExit, false,                      \
83298186Sgordon          "Prints the system dictionary at exit")                           \
83378344Sobrien                                                                            \
83478344Sobrien  diagnostic(bool, UnsyncloadClass, false,                                  \
83578344Sobrien          "Unstable: VM calls loadClass unsynchronized. Custom classloader "\
83678344Sobrien          "must call VM synchronized for findClass & defineClass")          \
837126288Smtm                                                                            \
83898186Sgordon  product_pd(bool, DontYieldALot,                                           \
83998186Sgordon          "Throw away obvious excess yield calls (for SOLARIS only)")       \
84078344Sobrien                                                                            \
84198186Sgordon  product_pd(bool, ConvertSleepToYield,                                     \
84298186Sgordon          "Converts sleep(0) to thread yield "                              \
84398186Sgordon          "(may be off for SOLARIS to improve GUI)")                        \
84498186Sgordon                                                                            \
845130161Smtm  product(bool, ConvertYieldToSleep, false,                                 \
846130161Smtm          "Converts yield to a sleep of MinSleepInterval to simulate Win32 "\
84798186Sgordon          "behavior (SOLARIS only)")                                        \
84898186Sgordon                                                                            \
84998186Sgordon  product(bool, UseBoundThreads, true,                                      \
85078344Sobrien          "Bind user level threads to kernel threads (for SOLARIS only)")   \
85178344Sobrien                                                                            \
85278344Sobrien  develop(bool, UseDetachedThreads, true,                                   \
85378344Sobrien          "Use detached threads that are recycled upon termination "        \
85478344Sobrien          "(for SOLARIS only)")                                             \
85578344Sobrien                                                                            \
85678344Sobrien  product(bool, UseLWPSynchronization, true,                                \
85778344Sobrien          "Use LWP-based instead of libthread-based synchronization "       \
85878344Sobrien          "(SPARC only)")                                                   \
85978344Sobrien                                                                            \
86078344Sobrien  product(ccstr, SyncKnobs, NULL,                                           \
86178344Sobrien          "(Unstable) Various monitor synchronization tunables")            \
86278344Sobrien                                                                            \
86378344Sobrien  product(intx, EmitSync, 0,                                                \
86478344Sobrien          "(Unsafe,Unstable) "                                              \
865126285Smtm          " Controls emission of inline sync fast-path code")               \
866126285Smtm                                                                            \
867126285Smtm  product(intx, AlwaysInflate, 0, "(Unstable) Force inflation")             \
86898186Sgordon                                                                            \
86998186Sgordon  product(intx, Atomics, 0,                                                 \
87098186Sgordon          "(Unsafe,Unstable) Diagnostic - Controls emission of atomics")    \
87198186Sgordon                                                                            \
87298186Sgordon  product(intx, FenceInstruction, 0,                                        \
87398186Sgordon          "(Unsafe,Unstable) Experimental")                                 \
87498186Sgordon                                                                            \
87598186Sgordon  product(intx, SyncFlags, 0, "(Unsafe,Unstable) Experimental Sync flags" ) \
876126285Smtm                                                                            \
87798186Sgordon  product(intx, SyncVerbose, 0, "(Unstable)" )                              \
87878344Sobrien                                                                            \
87998186Sgordon  product(intx, ClearFPUAtPark, 0, "(Unsafe,Unstable)" )                    \
88078344Sobrien                                                                            \
88178344Sobrien  product(intx, hashCode, 0,                                                \
882101850Sgordon         "(Unstable) select hashCode generation algorithm" )                \
883101850Sgordon                                                                            \
884101850Sgordon  product(intx, WorkAroundNPTLTimedWaitHang, 1,                             \
885103018Sgordon         "(Unstable, Linux-specific)"                                       \
886101850Sgordon         " avoid NPTL-FUTEX hang pthread_cond_timedwait" )                  \
887101850Sgordon                                                                            \
888101850Sgordon  product(bool, FilterSpuriousWakeups , true,                               \
889101850Sgordon          "Prevent spurious or premature wakeups from object.wait"              \
890101850Sgordon          "(Solaris only)")                                                     \
891101850Sgordon                                                                            \
892101850Sgordon  product(intx, NativeMonitorTimeout, -1, "(Unstable)" )                    \
893101850Sgordon  product(intx, NativeMonitorFlags, 0, "(Unstable)" )                       \
894115950Smtm  product(intx, NativeMonitorSpinLimit, 20, "(Unstable)" )                  \
895115950Smtm                                                                            \
896101850Sgordon  develop(bool, UsePthreads, false,                                         \
897101850Sgordon          "Use pthread-based instead of libthread-based synchronization "   \
898101850Sgordon          "(SPARC only)")                                                   \
89978344Sobrien                                                                            \
90078344Sobrien  product(bool, AdjustConcurrency, false,                                   \
90178344Sobrien          "call thr_setconcurrency at thread create time to avoid "         \
90278344Sobrien          "LWP starvation on MP systems (For Solaris Only)")                \
90378344Sobrien                                                                            \
90478344Sobrien  develop(bool, UpdateHotSpotCompilerFileOnError, true,                     \
90578344Sobrien          "Should the system attempt to update the compiler file when "     \
90678344Sobrien          "an error occurs?")                                               \
90778344Sobrien                                                                            \
908126303Smtm  product(bool, ReduceSignalUsage, false,                                   \
90978344Sobrien          "Reduce the use of OS signals in Java and/or the VM")             \
91078344Sobrien                                                                            \
911126286Smtm  notproduct(bool, ValidateMarkSweep, false,                                \
91278344Sobrien          "Do extra validation during MarkSweep collection")                \
91378344Sobrien                                                                            \
91478344Sobrien  notproduct(bool, RecordMarkSweepCompaction, false,                        \
91578344Sobrien          "Enable GC-to-GC recording and querying of compaction during "    \
91678344Sobrien          "MarkSweep")                                                      \
91778344Sobrien                                                                            \
91878344Sobrien  develop_pd(bool, ShareVtableStubs,                                        \
91978344Sobrien          "Share vtable stubs (smaller code but worse branch prediction")   \
92078344Sobrien                                                                            \
92178344Sobrien  develop(bool, LoadLineNumberTables, true,                                 \
92278344Sobrien          "Tells whether the class file parser loads line number tables")   \
92378344Sobrien                                                                            \
92478344Sobrien  develop(bool, LoadLocalVariableTables, true,                              \
92578344Sobrien          "Tells whether the class file parser loads local variable tables")\
92678344Sobrien                                                                            \
92778344Sobrien  develop(bool, LoadLocalVariableTypeTables, true,                          \
928106643Sgordon          "Tells whether the class file parser loads local variable type tables")\
929106643Sgordon                                                                            \
930106643Sgordon  product(bool, AllowUserSignalHandlers, false,                             \
931106643Sgordon          "Do not complain if the application installs signal handlers "    \
93278344Sobrien          "(Solaris & Linux only)")                                         \
93378344Sobrien                                                                            \
93478344Sobrien  product(bool, UseSignalChaining, true,                                    \
93578344Sobrien          "Use signal-chaining to invoke signal handlers installed "        \
93678344Sobrien          "by the application (Solaris & Linux only)")                      \
93778344Sobrien                                                                            \
93878344Sobrien  product(bool, UseAltSigs, false,                                          \
93978344Sobrien          "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM "      \
94078344Sobrien          "internal signals. (Solaris only)")                               \
941106643Sgordon                                                                            \
942106643Sgordon  product(bool, UseSpinning, false,                                         \
943106643Sgordon          "Use spinning in monitor inflation and before entry")             \
944106643Sgordon                                                                            \
94578344Sobrien  product(bool, PreSpinYield, false,                                        \
94698186Sgordon          "Yield before inner spinning loop")                               \
94798186Sgordon                                                                            \
94898186Sgordon  product(bool, PostSpinYield, true,                                        \
94998186Sgordon          "Yield after inner spinning loop")                                \
95098186Sgordon                                                                            \
95198186Sgordon  product(bool, AllowJNIEnvProxy, false,                                    \
95298186Sgordon          "Allow JNIEnv proxies for jdbx")                                  \
953119170Smtm                                                                            \
954119170Smtm  product(bool, JNIDetachReleasesMonitors, true,                            \
955119170Smtm          "JNI DetachCurrentThread releases monitors owned by thread")      \
956119170Smtm                                                                            \
957119170Smtm  product(bool, RestoreMXCSROnJNICalls, false,                              \
958119170Smtm          "Restore MXCSR when returning from JNI calls")                    \
959119170Smtm                                                                            \
960119170Smtm  product(bool, CheckJNICalls, false,                                       \
96198186Sgordon          "Verify all arguments to JNI calls")                              \
96298186Sgordon                                                                            \
96398186Sgordon  product(bool, UseFastJNIAccessors, true,                                  \
96498186Sgordon          "Use optimized versions of Get<Primitive>Field")                  \
965106643Sgordon                                                                            \
96698186Sgordon  product(bool, EagerXrunInit, false,                                       \
96798186Sgordon          "Eagerly initialize -Xrun libraries; allows startup profiling, "  \
96898186Sgordon          " but not all -Xrun libraries may support the state of the VM at this time") \
96998186Sgordon                                                                            \
97098186Sgordon  product(bool, PreserveAllAnnotations, false,                              \
97198186Sgordon          "Preserve RuntimeInvisibleAnnotations as well as RuntimeVisibleAnnotations") \
97298186Sgordon                                                                            \
973106700Sgordon  develop(uintx, PreallocatedOutOfMemoryErrorCount, 4,                      \
974106700Sgordon          "Number of OutOfMemoryErrors preallocated with backtrace")        \
975106700Sgordon                                                                            \
976106643Sgordon  product(bool, LazyBootClassLoader, true,                                  \
97798186Sgordon          "Enable/disable lazy opening of boot class path entries")         \
97898186Sgordon                                                                            \
97998186Sgordon  diagnostic(bool, UseIncDec, true,                                         \
98098186Sgordon          "Use INC, DEC instructions on x86")                               \
98198186Sgordon                                                                            \
98298186Sgordon  product(bool, UseNewLongLShift, false,                                    \
98398186Sgordon          "Use optimized bitwise shift left")                               \
98498186Sgordon                                                                            \
98598186Sgordon  product(bool, UseStoreImmI16, true,                                       \
98698186Sgordon          "Use store immediate 16-bits value instruction on x86")           \
98798186Sgordon                                                                            \
98898186Sgordon  product(bool, UseAddressNop, false,                                       \
98998186Sgordon          "Use '0F 1F [addr]' NOP instructions on x86 cpus")                \
99098186Sgordon                                                                            \
99198186Sgordon  product(bool, UseXmmLoadAndClearUpper, true,                              \
99298186Sgordon          "Load low part of XMM register and clear upper part")             \
99398186Sgordon                                                                            \
99498186Sgordon  product(bool, UseXmmRegToRegMoveAll, false,                               \
99598186Sgordon          "Copy all XMM register bits when moving value between registers") \
99698186Sgordon                                                                            \
99798186Sgordon  product(bool, UseXmmI2D, false,                                           \
99898186Sgordon          "Use SSE2 CVTDQ2PD instruction to convert Integer to Double")     \
99998186Sgordon                                                                            \
100098186Sgordon  product(bool, UseXmmI2F, false,                                           \
100198186Sgordon          "Use SSE2 CVTDQ2PS instruction to convert Integer to Float")      \
100298186Sgordon                                                                            \
100398186Sgordon  product(bool, UseXMMForArrayCopy, false,                                  \
100498186Sgordon          "Use SSE2 MOVQ instruction for Arraycopy")                        \
100598186Sgordon                                                                            \
100698186Sgordon  product(bool, UseUnalignedLoadStores, false,                              \
100798186Sgordon          "Use SSE2 MOVDQU instruction for Arraycopy")                      \
100898186Sgordon                                                                            \
100998186Sgordon  product(intx, FieldsAllocationStyle, 1,                                   \
101098186Sgordon          "0 - type based with oops first, 1 - with oops last")             \
101198186Sgordon                                                                            \
101298186Sgordon  product(bool, CompactFields, true,                                        \
101398186Sgordon          "Allocate nonstatic fields in gaps between previous fields")      \
101498186Sgordon                                                                            \
101598186Sgordon  notproduct(bool, PrintCompactFieldsSavings, false,                        \
101698186Sgordon          "Print how many words were saved with CompactFields")             \
101798186Sgordon                                                                            \
101898186Sgordon  product(bool, UseBiasedLocking, true,                                     \
101998186Sgordon          "Enable biased locking in JVM")                                   \
102098186Sgordon                                                                            \
102198186Sgordon  product(intx, BiasedLockingStartupDelay, 4000,                            \
102298186Sgordon          "Number of milliseconds to wait before enabling biased locking")  \
102398186Sgordon                                                                            \
102498186Sgordon  diagnostic(bool, PrintBiasedLockingStatistics, false,                     \
102598186Sgordon          "Print statistics of biased locking in JVM")                      \
102698186Sgordon                                                                            \
102798186Sgordon  product(intx, BiasedLockingBulkRebiasThreshold, 20,                       \
102898186Sgordon          "Threshold of number of revocations per type to try to "          \
102998186Sgordon          "rebias all objects in the heap of that type")                    \
103098186Sgordon                                                                            \
103198186Sgordon  product(intx, BiasedLockingBulkRevokeThreshold, 40,                       \
103298186Sgordon          "Threshold of number of revocations per type to permanently "     \
103398186Sgordon          "revoke biases of all objects in the heap of that type")          \
103498186Sgordon                                                                            \
103598186Sgordon  product(intx, BiasedLockingDecayTime, 25000,                              \
103698186Sgordon          "Decay time (in milliseconds) to re-enable bulk rebiasing of a "  \
103798186Sgordon          "type after previous bulk rebias")                                \
103898186Sgordon                                                                            \
103998186Sgordon  /* tracing */                                                             \
104098186Sgordon                                                                            \
104198186Sgordon  notproduct(bool, TraceRuntimeCalls, false,                                \
104298186Sgordon          "Trace run-time calls")                                           \
104398186Sgordon                                                                            \
104498186Sgordon  develop(bool, TraceJNICalls, false,                                       \
104598186Sgordon          "Trace JNI calls")                                                \
104698186Sgordon                                                                            \
104798186Sgordon  notproduct(bool, TraceJVMCalls, false,                                    \
104898186Sgordon          "Trace JVM calls")                                                \
104998186Sgordon                                                                            \
105098186Sgordon  product(ccstr, TraceJVMTI, NULL,                                          \
105198186Sgordon          "Trace flags for JVMTI functions and events")                     \
105298186Sgordon                                                                            \
105398186Sgordon  /* This option can change an EMCP method into an obsolete method. */      \
105498186Sgordon  /* This can affect tests that except specific methods to be EMCP. */      \
105598186Sgordon  /* This option should be used with caution. */                            \
105698186Sgordon  product(bool, StressLdcRewrite, false,                                    \
105798186Sgordon          "Force ldc -> ldc_w rewrite during RedefineClasses")              \
105898186Sgordon                                                                            \
105998186Sgordon  product(intx, TraceRedefineClasses, 0,                                    \
106098186Sgordon          "Trace level for JVMTI RedefineClasses")                          \
106198186Sgordon                                                                            \
106298186Sgordon  /* change to false by default sometime after Mustang */                   \
106398186Sgordon  product(bool, VerifyMergedCPBytecodes, true,                              \
106498186Sgordon          "Verify bytecodes after RedefineClasses constant pool merging")   \
106598186Sgordon                                                                            \
1066119166Smtm  develop(bool, TraceJNIHandleAllocation, false,                            \
1067123344Smtm          "Trace allocation/deallocation of JNI handle blocks")             \
1068123344Smtm                                                                            \
1069123344Smtm  develop(bool, TraceThreadEvents, false,                                   \
1070123344Smtm          "Trace all thread events")                                        \
1071123344Smtm                                                                            \
1072119166Smtm  develop(bool, TraceBytecodes, false,                                      \
1073123344Smtm          "Trace bytecode execution")                                       \
1074119166Smtm                                                                            \
1075123344Smtm  develop(bool, TraceClassInitialization, false,                            \
1076123344Smtm          "Trace class initialization")                                     \
1077123344Smtm                                                                            \
1078123344Smtm  develop(bool, TraceExceptions, false,                                     \
1079123344Smtm          "Trace exceptions")                                               \
1080119166Smtm                                                                            \
1081123344Smtm  develop(bool, TraceICs, false,                                            \
1082123344Smtm          "Trace inline cache changes")                                     \
1083119166Smtm                                                                            \
1084119166Smtm  notproduct(bool, TraceInvocationCounterOverflow, false,                   \
1085123344Smtm          "Trace method invocation counter overflow")                       \
1086123344Smtm                                                                            \
1087119166Smtm  develop(bool, TraceInlineCacheClearing, false,                            \
1088119166Smtm          "Trace clearing of inline caches in nmethods")                    \
1089119166Smtm                                                                            \
1090123344Smtm  develop(bool, TraceDependencies, false,                                   \
1091119166Smtm          "Trace dependencies")                                             \
1092119166Smtm                                                                            \
1093119166Smtm  develop(bool, VerifyDependencies, trueInDebug,                            \
1094119166Smtm         "Exercise and verify the compilation dependency mechanism")        \
1095119166Smtm                                                                            \
1096119166Smtm  develop(bool, TraceNewOopMapGeneration, false,                            \
1097119166Smtm          "Trace OopMapGeneration")                                         \
1098119166Smtm                                                                            \
1099119166Smtm  develop(bool, TraceNewOopMapGenerationDetailed, false,                    \
1100119166Smtm          "Trace OopMapGeneration: print detailed cell states")             \
1101119166Smtm                                                                            \
1102119166Smtm  develop(bool, TimeOopMap, false,                                          \
1103119166Smtm          "Time calls to GenerateOopMap::compute_map() in sum")             \
1104119166Smtm                                                                            \
1105119166Smtm  develop(bool, TimeOopMap2, false,                                         \
1106119166Smtm          "Time calls to GenerateOopMap::compute_map() individually")       \
1107119166Smtm                                                                            \
1108119166Smtm  develop(bool, TraceMonitorMismatch, false,                                \
1109119166Smtm          "Trace monitor matching failures during OopMapGeneration")        \
1110119166Smtm                                                                            \
1111119166Smtm  develop(bool, TraceOopMapRewrites, false,                                 \
1112119166Smtm          "Trace rewritting of method oops during oop map generation")      \
1113119166Smtm                                                                            \
1114119166Smtm  develop(bool, TraceSafepoint, false,                                      \
1115119166Smtm          "Trace safepoint operations")                                     \
1116119166Smtm                                                                            \
1117119166Smtm  develop(bool, TraceICBuffer, false,                                       \
1118119166Smtm          "Trace usage of IC buffer")                                       \
1119119166Smtm                                                                            \
1120119166Smtm  develop(bool, TraceCompiledIC, false,                                     \
1121119166Smtm          "Trace changes of compiled IC")                                   \
1122119166Smtm                                                                            \
1123119166Smtm  notproduct(bool, TraceZapDeadLocals, false,                               \
1124119166Smtm          "Trace zapping dead locals")                                      \
1125119166Smtm                                                                            \
1126119166Smtm  develop(bool, TraceStartupTime, false,                                    \
1127119166Smtm          "Trace setup time")                                               \
1128119166Smtm                                                                            \
1129119166Smtm  develop(bool, TraceHPI, false,                                            \
1130119166Smtm          "Trace Host Porting Interface (HPI)")                             \
1131119166Smtm                                                                            \
1132119166Smtm  product(ccstr, HPILibPath, NULL,                                          \
1133119166Smtm          "Specify alternate path to HPI library")                          \
1134119166Smtm                                                                            \
1135119166Smtm  develop(bool, TraceProtectionDomainVerification, false,                   \
1136119166Smtm          "Trace protection domain verifcation")                            \
1137119166Smtm                                                                            \
1138119166Smtm  develop(bool, TraceClearedExceptions, false,                              \
1139119166Smtm          "Prints when an exception is forcibly cleared")                   \
1140119166Smtm                                                                            \
1141119166Smtm  product(bool, TraceClassResolution, false,                                \
1142119166Smtm          "Trace all constant pool resolutions (for debugging)")            \
1143119166Smtm                                                                            \
1144119166Smtm  product(bool, TraceBiasedLocking, false,                                  \
1145119166Smtm          "Trace biased locking in JVM")                                    \
1146119166Smtm                                                                            \
1147119166Smtm  product(bool, TraceMonitorInflation, false,                               \
1148119166Smtm          "Trace monitor inflation in JVM")                                 \
1149119166Smtm                                                                            \
1150119166Smtm  /* assembler */                                                           \
1151119166Smtm  product(bool, Use486InstrsOnly, false,                                    \
1152119166Smtm          "Use 80486 Compliant instruction subset")                         \
1153119166Smtm                                                                            \
1154119166Smtm  /* gc */                                                                  \
1155119166Smtm                                                                            \
1156119166Smtm  product(bool, UseSerialGC, false,                                         \
1157119166Smtm          "Use the serial garbage collector")                               \
1158119166Smtm                                                                            \
1159119166Smtm  experimental(bool, UseG1GC, false,                                        \
1160119166Smtm          "Use the Garbage-First garbage collector")                        \
1161119166Smtm                                                                            \
1162119166Smtm  product(bool, UseParallelGC, false,                                       \
1163119166Smtm          "Use the Parallel Scavenge garbage collector")                    \
1164119166Smtm                                                                            \
1165119166Smtm  product(bool, UseParallelOldGC, false,                                    \
1166119166Smtm          "Use the Parallel Old garbage collector")                         \
1167119166Smtm                                                                            \
1168119166Smtm  product(bool, UseParallelOldGCCompacting, true,                           \
1169119166Smtm          "In the Parallel Old garbage collector use parallel compaction")  \
1170119166Smtm                                                                            \
1171119166Smtm  product(bool, UseParallelDensePrefixUpdate, true,                         \
1172119166Smtm          "In the Parallel Old garbage collector use parallel dense"        \
1173119166Smtm          " prefix update")                                                 \
1174119166Smtm                                                                            \
1175119166Smtm  product(uintx, HeapMaximumCompactionInterval, 20,                         \
1176119166Smtm          "How often should we maximally compact the heap (not allowing "   \
1177119166Smtm          "any dead space)")                                                \
1178119166Smtm                                                                            \
1179119166Smtm  product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
1180119166Smtm          "The collection count for the first maximum compaction")          \
1181119166Smtm                                                                            \
1182119166Smtm  product(bool, UseMaximumCompactionOnSystemGC, true,                       \
1183119166Smtm          "In the Parallel Old garbage collector maximum compaction for "   \
1184119166Smtm          "a system GC")                                                    \
1185119166Smtm                                                                            \
1186119166Smtm  product(uintx, ParallelOldDeadWoodLimiterMean, 50,                        \
1187119166Smtm          "The mean used by the par compact dead wood"                      \
1188119166Smtm          "limiter (a number between 0-100).")                              \
1189119166Smtm                                                                            \
1190119166Smtm  product(uintx, ParallelOldDeadWoodLimiterStdDev, 80,                      \
1191119166Smtm          "The standard deviation used by the par compact dead wood"        \
1192119166Smtm          "limiter (a number between 0-100).")                              \
1193119166Smtm                                                                            \
1194119166Smtm  product(bool, UseParallelOldGCDensePrefix, true,                          \
1195119166Smtm          "Use a dense prefix with the Parallel Old garbage collector")     \
1196119166Smtm                                                                            \
1197119166Smtm  product(uintx, ParallelGCThreads, 0,                                      \
1198119166Smtm          "Number of parallel threads parallel gc will use")                \
1199119166Smtm                                                                            \
1200119166Smtm  product(uintx, ParallelCMSThreads, 0,                                     \
1201119166Smtm          "Max number of threads CMS will use for concurrent work")         \
1202119166Smtm                                                                            \
1203119166Smtm  develop(bool, ParallelOldMTUnsafeMarkBitMap, false,                       \
1204119166Smtm          "Use the Parallel Old MT unsafe in marking the bitmap")           \
1205119166Smtm                                                                            \
1206119166Smtm  develop(bool, ParallelOldMTUnsafeUpdateLiveData, false,                   \
1207119166Smtm          "Use the Parallel Old MT unsafe in update of live size")          \
1208119166Smtm                                                                            \
1209119166Smtm  develop(bool, TraceRegionTasksQueuing, false,                             \
1210119166Smtm          "Trace the queuing of the region tasks")                          \
1211119166Smtm                                                                            \
1212119166Smtm  product(uintx, ParallelMarkingThreads, 0,                                 \
1213119166Smtm          "Number of marking threads concurrent gc will use")               \
1214119166Smtm                                                                            \
1215119166Smtm  product(uintx, YoungPLABSize, 4096,                                       \
1216119166Smtm          "Size of young gen promotion labs (in HeapWords)")                \
1217119166Smtm                                                                            \
1218119166Smtm  product(uintx, OldPLABSize, 1024,                                         \
1219119166Smtm          "Size of old gen promotion labs (in HeapWords)")                  \
1220119166Smtm                                                                            \
1221119166Smtm  product(uintx, GCTaskTimeStampEntries, 200,                               \
1222119166Smtm          "Number of time stamp entries per gc worker thread")              \
1223119166Smtm                                                                            \
1224119166Smtm  product(bool, AlwaysTenure, false,                                        \
1225119166Smtm          "Always tenure objects in eden. (ParallelGC only)")               \
1226119166Smtm                                                                            \
1227119166Smtm  product(bool, NeverTenure, false,                                         \
1228119166Smtm          "Never tenure objects in eden, May tenure on overflow"            \
1229119166Smtm          " (ParallelGC only)")                                             \
1230119166Smtm                                                                            \
1231119166Smtm  product(bool, ScavengeBeforeFullGC, true,                                 \
1232119166Smtm          "Scavenge youngest generation before each full GC,"               \
1233119166Smtm          " used with UseParallelGC")                                       \
1234119166Smtm                                                                            \
1235119166Smtm  develop(bool, ScavengeWithObjectsInToSpace, false,                        \
1236119166Smtm          "Allow scavenges to occur when to_space contains objects.")       \
1237119166Smtm                                                                            \
1238119166Smtm  product(bool, UseConcMarkSweepGC, false,                                  \
1239119166Smtm          "Use Concurrent Mark-Sweep GC in the old generation")             \
1240119166Smtm                                                                            \
1241119166Smtm  product(bool, ExplicitGCInvokesConcurrent, false,                         \
1242119166Smtm          "A System.gc() request invokes a concurrent collection;"          \
1243119166Smtm          " (effective only when UseConcMarkSweepGC)")                      \
1244119166Smtm                                                                            \
1245119166Smtm  product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false,        \
1246119166Smtm          "A System.gc() request invokes a concurrent collection and"       \
1247119166Smtm          " also unloads classes during such a concurrent gc cycle  "       \
1248119166Smtm          " (effective only when UseConcMarkSweepGC)")                      \
1249119166Smtm                                                                            \
1250119166Smtm  develop(bool, UseCMSAdaptiveFreeLists, true,                              \
1251119166Smtm          "Use Adaptive Free Lists in the CMS generation")                  \
1252119166Smtm                                                                            \
1253119166Smtm  develop(bool, UseAsyncConcMarkSweepGC, true,                              \
1254119166Smtm          "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\
1255119166Smtm                                                                            \
1256119166Smtm  develop(bool, RotateCMSCollectionTypes, false,                            \
1257119166Smtm          "Rotate the CMS collections among concurrent and STW")            \
1258119166Smtm                                                                            \
1259119166Smtm  product(bool, UseCMSBestFit, true,                                        \
1260124797Scperciva          "Use CMS best fit allocation strategy")                           \
1261119166Smtm                                                                            \
1262119166Smtm  product(bool, UseCMSCollectionPassing, true,                              \
1263119166Smtm          "Use passing of collection from background to foreground")        \
1264119166Smtm                                                                            \
1265119166Smtm  product(bool, UseParNewGC, false,                                         \
1266119166Smtm          "Use parallel threads in the new generation.")                    \
1267119166Smtm                                                                            \
1268119166Smtm  product(bool, ParallelGCVerbose, false,                                   \
1269119166Smtm          "Verbose output for parallel GC.")                                \
1270119166Smtm                                                                            \
1271119166Smtm  product(intx, ParallelGCBufferWastePct, 10,                               \
1272119166Smtm          "wasted fraction of parallel allocation buffer.")                 \
1273119166Smtm                                                                            \
1274119166Smtm  product(bool, ParallelGCRetainPLAB, true,                                 \
1275119166Smtm          "Retain parallel allocation buffers across scavenges.")           \
1276119166Smtm                                                                            \
1277119166Smtm  product(intx, TargetPLABWastePct, 10,                                     \
1278119166Smtm          "target wasted space in last buffer as pct of overall allocation")\
1279119166Smtm                                                                            \
1280119166Smtm  product(uintx, PLABWeight, 75,                                            \
1281119166Smtm          "Percentage (0-100) used to weight the current sample when"       \
1282119166Smtm          "computing exponentially decaying average for ResizePLAB.")       \
1283119166Smtm                                                                            \
1284119166Smtm  product(bool, ResizePLAB, true,                                           \
1285119166Smtm          "Dynamically resize (survivor space) promotion labs")             \
1286127345Sbrooks                                                                            \
1287127345Sbrooks  product(bool, PrintPLAB, false,                                           \
1288127345Sbrooks          "Print (survivor space) promotion labs sizing decisions")         \
1289127345Sbrooks                                                                            \
1290127345Sbrooks  product(intx, ParGCArrayScanChunk, 50,                                    \
1291127345Sbrooks          "Scan a subset and push remainder, if array is bigger than this") \
1292137451Skeramida                                                                            \
1293127345Sbrooks  product(intx, ParGCDesiredObjsFromOverflowList, 20,                       \
1294127345Sbrooks          "The desired number of objects to claim from the overflow list")  \
1295137451Skeramida                                                                            \
1296127345Sbrooks  product(uintx, CMSParPromoteBlocksToClaim, 50,                            \
1297137451Skeramida          "Number of blocks to attempt to claim when refilling CMS LAB for "\
1298127345Sbrooks          "parallel GC.")                                                   \
1299131550Scperciva                                                                            \
1300131550Scperciva  product(bool, AlwaysPreTouch, false,                                      \
1301          "It forces all freshly committed pages to be pre-touched.")       \
1302                                                                            \
1303  product(bool, CMSUseOldDefaults, false,                                   \
1304          "A flag temporarily  introduced to allow reverting to some older" \
1305          "default settings; older as of 6.0 ")                             \
1306                                                                            \
1307  product(intx, CMSYoungGenPerWorker, 16*M,                                 \
1308          "The amount of young gen chosen by default per GC worker "        \
1309          "thread available ")                                              \
1310                                                                            \
1311  product(bool, GCOverheadReporting, false,                                 \
1312         "Enables the GC overhead reporting facility")                      \
1313                                                                            \
1314  product(intx, GCOverheadReportingPeriodMS, 100,                           \
1315          "Reporting period for conc GC overhead reporting, in ms ")        \
1316                                                                            \
1317  product(bool, CMSIncrementalMode, false,                                  \
1318          "Whether CMS GC should operate in \"incremental\" mode")          \
1319                                                                            \
1320  product(uintx, CMSIncrementalDutyCycle, 10,                               \
1321          "CMS incremental mode duty cycle (a percentage, 0-100).  If"      \
1322          "CMSIncrementalPacing is enabled, then this is just the initial"  \
1323          "value")                                                          \
1324                                                                            \
1325  product(bool, CMSIncrementalPacing, true,                                 \
1326          "Whether the CMS incremental mode duty cycle should be "          \
1327          "automatically adjusted")                                         \
1328                                                                            \
1329  product(uintx, CMSIncrementalDutyCycleMin, 0,                             \
1330          "Lower bound on the duty cycle when CMSIncrementalPacing is"      \
1331          "enabled (a percentage, 0-100).")                                 \
1332                                                                            \
1333  product(uintx, CMSIncrementalSafetyFactor, 10,                            \
1334          "Percentage (0-100) used to add conservatism when computing the"  \
1335          "duty cycle.")                                                    \
1336                                                                            \
1337  product(uintx, CMSIncrementalOffset, 0,                                   \
1338          "Percentage (0-100) by which the CMS incremental mode duty cycle" \
1339          "is shifted to the right within the period between young GCs")    \
1340                                                                            \
1341  product(uintx, CMSExpAvgFactor, 25,                                       \
1342          "Percentage (0-100) used to weight the current sample when"       \
1343          "computing exponential averages for CMS statistics.")             \
1344                                                                            \
1345  product(uintx, CMS_FLSWeight, 50,                                         \
1346          "Percentage (0-100) used to weight the current sample when"       \
1347          "computing exponentially decating averages for CMS FLS statistics.") \
1348                                                                            \
1349  product(uintx, CMS_FLSPadding, 2,                                         \
1350          "The multiple of deviation from mean to use for buffering"        \
1351          "against volatility in free list demand.")                        \
1352                                                                            \
1353  product(uintx, FLSCoalescePolicy, 2,                                      \
1354          "CMS: Aggression level for coalescing, increasing from 0 to 4")   \
1355                                                                            \
1356  product(uintx, CMS_SweepWeight, 50,                                       \
1357          "Percentage (0-100) used to weight the current sample when"       \
1358          "computing exponentially decaying average for inter-sweep duration.") \
1359                                                                            \
1360  product(uintx, CMS_SweepPadding, 2,                                       \
1361          "The multiple of deviation from mean to use for buffering"        \
1362          "against volatility in inter-sweep duration.")                    \
1363                                                                            \
1364  product(uintx, CMS_SweepTimerThresholdMillis, 10,                         \
1365          "Skip block flux-rate sampling for an epoch unless inter-sweep "  \
1366          " duration exceeds this threhold in milliseconds")                \
1367                                                                            \
1368  develop(bool, CMSTraceIncrementalMode, false,                             \
1369          "Trace CMS incremental mode")                                     \
1370                                                                            \
1371  develop(bool, CMSTraceIncrementalPacing, false,                           \
1372          "Trace CMS incremental mode pacing computation")                  \
1373                                                                            \
1374  develop(bool, CMSTraceThreadState, false,                                 \
1375          "Trace the CMS thread state (enable the trace_state() method)")   \
1376                                                                            \
1377  product(bool, CMSClassUnloadingEnabled, false,                            \
1378          "Whether class unloading enabled when using CMS GC")              \
1379                                                                            \
1380  product(uintx, CMSClassUnloadingMaxInterval, 0,                           \
1381          "When CMS class unloading is enabled, the maximum CMS cycle count"\
1382          " for which classes may not be unloaded")                         \
1383                                                                            \
1384  product(bool, CMSCompactWhenClearAllSoftRefs, true,                       \
1385          "Compact when asked to collect CMS gen with clear_all_soft_refs") \
1386                                                                            \
1387  product(bool, UseCMSCompactAtFullCollection, true,                        \
1388          "Use mark sweep compact at full collections")                     \
1389                                                                            \
1390  product(uintx, CMSFullGCsBeforeCompaction, 0,                             \
1391          "Number of CMS full collection done before compaction if > 0")    \
1392                                                                            \
1393  develop(intx, CMSDictionaryChoice, 0,                                     \
1394          "Use BinaryTreeDictionary as default in the CMS generation")      \
1395                                                                            \
1396  product(uintx, CMSIndexedFreeListReplenish, 4,                            \
1397          "Replenish and indexed free list with this number of chunks")     \
1398                                                                            \
1399  product(bool, CMSLoopWarn, false,                                         \
1400          "Warn in case of excessive CMS looping")                          \
1401                                                                            \
1402  develop(bool, CMSOverflowEarlyRestoration, false,                         \
1403          "Whether preserved marks should be restored early")               \
1404                                                                            \
1405  product(uintx, CMSMarkStackSize, 32*K,                                    \
1406          "Size of CMS marking stack")                                      \
1407                                                                            \
1408  product(uintx, CMSMarkStackSizeMax, 4*M,                                  \
1409          "Max size of CMS marking stack")                                  \
1410                                                                            \
1411  notproduct(bool, CMSMarkStackOverflowALot, false,                         \
1412          "Whether we should simulate frequent marking stack / work queue"  \
1413          " overflow")                                                      \
1414                                                                            \
1415  notproduct(intx, CMSMarkStackOverflowInterval, 1000,                      \
1416          "A per-thread `interval' counter that determines how frequently"  \
1417          " we simulate overflow; a smaller number increases frequency")    \
1418                                                                            \
1419  product(uintx, CMSMaxAbortablePrecleanLoops, 0,                           \
1420          "(Temporary, subject to experimentation)"                         \
1421          "Maximum number of abortable preclean iterations, if > 0")        \
1422                                                                            \
1423  product(intx, CMSMaxAbortablePrecleanTime, 5000,                          \
1424          "(Temporary, subject to experimentation)"                         \
1425          "Maximum time in abortable preclean in ms")                       \
1426                                                                            \
1427  product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100,              \
1428          "(Temporary, subject to experimentation)"                         \
1429          "Nominal minimum work per abortable preclean iteration")          \
1430                                                                            \
1431  product(intx, CMSAbortablePrecleanWaitMillis, 100,                        \
1432          "(Temporary, subject to experimentation)"                         \
1433          " Time that we sleep between iterations when not given"           \
1434          " enough work per iteration")                                     \
1435                                                                            \
1436  product(uintx, CMSRescanMultiple, 32,                                     \
1437          "Size (in cards) of CMS parallel rescan task")                    \
1438                                                                            \
1439  product(uintx, CMSConcMarkMultiple, 32,                                   \
1440          "Size (in cards) of CMS concurrent MT marking task")              \
1441                                                                            \
1442  product(uintx, CMSRevisitStackSize, 1*M,                                  \
1443          "Size of CMS KlassKlass revisit stack")                           \
1444                                                                            \
1445  product(bool, CMSAbortSemantics, false,                                   \
1446          "Whether abort-on-overflow semantics is implemented")             \
1447                                                                            \
1448  product(bool, CMSParallelRemarkEnabled, true,                             \
1449          "Whether parallel remark enabled (only if ParNewGC)")             \
1450                                                                            \
1451  product(bool, CMSParallelSurvivorRemarkEnabled, true,                     \
1452          "Whether parallel remark of survivor space"                       \
1453          " enabled (effective only if CMSParallelRemarkEnabled)")          \
1454                                                                            \
1455  product(bool, CMSPLABRecordAlways, true,                                  \
1456          "Whether to always record survivor space PLAB bdries"             \
1457          " (effective only if CMSParallelSurvivorRemarkEnabled)")          \
1458                                                                            \
1459  product(bool, CMSConcurrentMTEnabled, true,                               \
1460          "Whether multi-threaded concurrent work enabled (if ParNewGC)")   \
1461                                                                            \
1462  product(bool, CMSPermGenPrecleaningEnabled, true,                         \
1463          "Whether concurrent precleaning enabled in perm gen"              \
1464          " (effective only when CMSPrecleaningEnabled is true)")           \
1465                                                                            \
1466  product(bool, CMSPrecleaningEnabled, true,                                \
1467          "Whether concurrent precleaning enabled")                         \
1468                                                                            \
1469  product(uintx, CMSPrecleanIter, 3,                                        \
1470          "Maximum number of precleaning iteration passes")                 \
1471                                                                            \
1472  product(uintx, CMSPrecleanNumerator, 2,                                   \
1473          "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence"  \
1474          " ratio")                                                         \
1475                                                                            \
1476  product(uintx, CMSPrecleanDenominator, 3,                                 \
1477          "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence"  \
1478          " ratio")                                                         \
1479                                                                            \
1480  product(bool, CMSPrecleanRefLists1, true,                                 \
1481          "Preclean ref lists during (initial) preclean phase")             \
1482                                                                            \
1483  product(bool, CMSPrecleanRefLists2, false,                                \
1484          "Preclean ref lists during abortable preclean phase")             \
1485                                                                            \
1486  product(bool, CMSPrecleanSurvivors1, false,                               \
1487          "Preclean survivors during (initial) preclean phase")             \
1488                                                                            \
1489  product(bool, CMSPrecleanSurvivors2, true,                                \
1490          "Preclean survivors during abortable preclean phase")             \
1491                                                                            \
1492  product(uintx, CMSPrecleanThreshold, 1000,                                \
1493          "Don't re-iterate if #dirty cards less than this")                \
1494                                                                            \
1495  product(bool, CMSCleanOnEnter, true,                                      \
1496          "Clean-on-enter optimization for reducing number of dirty cards") \
1497                                                                            \
1498  product(uintx, CMSRemarkVerifyVariant, 1,                                 \
1499          "Choose variant (1,2) of verification following remark")          \
1500                                                                            \
1501  product(uintx, CMSScheduleRemarkEdenSizeThreshold, 2*M,                   \
1502          "If Eden used is below this value, don't try to schedule remark") \
1503                                                                            \
1504  product(uintx, CMSScheduleRemarkEdenPenetration, 50,                      \
1505          "The Eden occupancy % at which to try and schedule remark pause") \
1506                                                                            \
1507  product(uintx, CMSScheduleRemarkSamplingRatio, 5,                         \
1508          "Start sampling Eden top at least before yg occupancy reaches"    \
1509          " 1/<ratio> of the size at which we plan to schedule remark")     \
1510                                                                            \
1511  product(uintx, CMSSamplingGrain, 16*K,                                    \
1512          "The minimum distance between eden samples for CMS (see above)")  \
1513                                                                            \
1514  product(bool, CMSScavengeBeforeRemark, false,                             \
1515          "Attempt scavenge before the CMS remark step")                    \
1516                                                                            \
1517  develop(bool, CMSTraceSweeper, false,                                     \
1518          "Trace some actions of the CMS sweeper")                          \
1519                                                                            \
1520  product(uintx, CMSWorkQueueDrainThreshold, 10,                            \
1521          "Don't drain below this size per parallel worker/thief")          \
1522                                                                            \
1523  product(intx, CMSWaitDuration, 2000,                                      \
1524          "Time in milliseconds that CMS thread waits for young GC")        \
1525                                                                            \
1526  product(bool, CMSYield, true,                                             \
1527          "Yield between steps of concurrent mark & sweep")                 \
1528                                                                            \
1529  product(uintx, CMSBitMapYieldQuantum, 10*M,                               \
1530          "Bitmap operations should process at most this many bits"         \
1531          "between yields")                                                 \
1532                                                                            \
1533  diagnostic(bool, FLSVerifyAllHeapReferences, false,                       \
1534          "Verify that all refs across the FLS boundary "                   \
1535          " are to valid objects")                                          \
1536                                                                            \
1537  diagnostic(bool, FLSVerifyLists, false,                                   \
1538          "Do lots of (expensive) FreeListSpace verification")              \
1539                                                                            \
1540  diagnostic(bool, FLSVerifyIndexTable, false,                              \
1541          "Do lots of (expensive) FLS index table verification")            \
1542                                                                            \
1543  develop(bool, FLSVerifyDictionary, false,                                 \
1544          "Do lots of (expensive) FLS dictionary verification")             \
1545                                                                            \
1546  develop(bool, VerifyBlockOffsetArray, false,                              \
1547          "Do (expensive!) block offset array verification")                \
1548                                                                            \
1549  product(bool, BlockOffsetArrayUseUnallocatedBlock, trueInDebug,           \
1550          "Maintain _unallocated_block in BlockOffsetArray"                 \
1551          " (currently applicable only to CMS collector)")                  \
1552                                                                            \
1553  develop(bool, TraceCMSState, false,                                       \
1554          "Trace the state of the CMS collection")                          \
1555                                                                            \
1556  product(intx, RefDiscoveryPolicy, 0,                                      \
1557          "Whether reference-based(0) or referent-based(1)")                \
1558                                                                            \
1559  product(bool, ParallelRefProcEnabled, false,                              \
1560          "Enable parallel reference processing whenever possible")         \
1561                                                                            \
1562  product(bool, ParallelRefProcBalancingEnabled, true,                      \
1563          "Enable balancing of reference processing queues")                \
1564                                                                            \
1565  product(intx, CMSTriggerRatio, 80,                                        \
1566          "Percentage of MinHeapFreeRatio in CMS generation that is "       \
1567          "  allocated before a CMS collection cycle commences")            \
1568                                                                            \
1569  product(intx, CMSTriggerPermRatio, 80,                                    \
1570          "Percentage of MinHeapFreeRatio in the CMS perm generation that"  \
1571          "  is allocated before a CMS collection cycle commences, that  "  \
1572          "  also collects the perm generation")                            \
1573                                                                            \
1574  product(uintx, CMSBootstrapOccupancy, 50,                                 \
1575          "Percentage CMS generation occupancy at which to "                \
1576          " initiate CMS collection for bootstrapping collection stats")    \
1577                                                                            \
1578  product(intx, CMSInitiatingOccupancyFraction, -1,                         \
1579          "Percentage CMS generation occupancy to start a CMS collection "  \
1580          " cycle (A negative value means that CMSTriggerRatio is used)")   \
1581                                                                            \
1582  product(intx, CMSInitiatingPermOccupancyFraction, -1,                     \
1583          "Percentage CMS perm generation occupancy to start a CMScollection"\
1584          " cycle (A negative value means that CMSTriggerPermRatio is used)")\
1585                                                                            \
1586  product(bool, UseCMSInitiatingOccupancyOnly, false,                       \
1587          "Only use occupancy as a crierion for starting a CMS collection") \
1588                                                                            \
1589  product(intx, CMSIsTooFullPercentage, 98,                                 \
1590          "An absolute ceiling above which CMS will always consider the"    \
1591          " perm gen ripe for collection")                                  \
1592                                                                            \
1593  develop(bool, CMSTestInFreeList, false,                                   \
1594          "Check if the coalesced range is already in the "                 \
1595          "free lists as claimed.")                                         \
1596                                                                            \
1597  notproduct(bool, CMSVerifyReturnedBytes, false,                           \
1598          "Check that all the garbage collected was returned to the "       \
1599          "free lists.")                                                    \
1600                                                                            \
1601  notproduct(bool, ScavengeALot, false,                                     \
1602          "Force scavenge at every Nth exit from the runtime system "       \
1603          "(N=ScavengeALotInterval)")                                       \
1604                                                                            \
1605  develop(bool, FullGCALot, false,                                          \
1606          "Force full gc at every Nth exit from the runtime system "        \
1607          "(N=FullGCALotInterval)")                                         \
1608                                                                            \
1609  notproduct(bool, GCALotAtAllSafepoints, false,                            \
1610          "Enforce ScavengeALot/GCALot at all potential safepoints")        \
1611                                                                            \
1612  product(bool, HandlePromotionFailure, true,                               \
1613          "The youngest generation collection does not require"             \
1614          " a guarantee of full promotion of all live objects.")            \
1615                                                                            \
1616  notproduct(bool, PromotionFailureALot, false,                             \
1617          "Use promotion failure handling on every youngest generation "    \
1618          "collection")                                                     \
1619                                                                            \
1620  develop(uintx, PromotionFailureALotCount, 1000,                           \
1621          "Number of promotion failures occurring at ParGCAllocBuffer"      \
1622          "refill attempts (ParNew) or promotion attempts "                 \
1623          "(other young collectors) ")                                      \
1624                                                                            \
1625  develop(uintx, PromotionFailureALotInterval, 5,                           \
1626          "Total collections between promotion failures alot")              \
1627                                                                            \
1628  develop(intx, WorkStealingSleepMillis, 1,                                 \
1629          "Sleep time when sleep is used for yields")                       \
1630                                                                            \
1631  develop(uintx, WorkStealingYieldsBeforeSleep, 1000,                       \
1632          "Number of yields before a sleep is done during workstealing")    \
1633                                                                            \
1634  product(uintx, PreserveMarkStackSize, 40,                                 \
1635           "Size for stack used in promotion failure handling")             \
1636                                                                            \
1637  product_pd(bool, UseTLAB, "Use thread-local object allocation")           \
1638                                                                            \
1639  product_pd(bool, ResizeTLAB,                                              \
1640          "Dynamically resize tlab size for threads")                       \
1641                                                                            \
1642  product(bool, ZeroTLAB, false,                                            \
1643          "Zero out the newly created TLAB")                                \
1644                                                                            \
1645  product(bool, FastTLABRefill, true,                                       \
1646          "Use fast TLAB refill code")                                      \
1647                                                                            \
1648  product(bool, PrintTLAB, false,                                           \
1649          "Print various TLAB related information")                         \
1650                                                                            \
1651  product(bool, TLABStats, true,                                            \
1652          "Print various TLAB related information")                         \
1653                                                                            \
1654  product_pd(bool, NeverActAsServerClassMachine,                            \
1655          "Never act like a server-class machine")                          \
1656                                                                            \
1657  product(bool, AlwaysActAsServerClassMachine, false,                       \
1658          "Always act like a server-class machine")                         \
1659                                                                            \
1660  product_pd(uintx, DefaultMaxRAM,                                          \
1661          "Maximum real memory size for setting server class heap size")    \
1662                                                                            \
1663  product(uintx, DefaultMaxRAMFraction, 4,                                  \
1664          "Fraction (1/n) of real memory used for server class max heap")   \
1665                                                                            \
1666  product(uintx, DefaultInitialRAMFraction, 64,                             \
1667          "Fraction (1/n) of real memory used for server class initial heap")  \
1668                                                                            \
1669  product(bool, UseAutoGCSelectPolicy, false,                               \
1670          "Use automatic collection selection policy")                      \
1671                                                                            \
1672  product(uintx, AutoGCSelectPauseMillis, 5000,                             \
1673          "Automatic GC selection pause threshhold in ms")                  \
1674                                                                            \
1675  product(bool, UseAdaptiveSizePolicy, true,                                \
1676          "Use adaptive generation sizing policies")                        \
1677                                                                            \
1678  product(bool, UsePSAdaptiveSurvivorSizePolicy, true,                      \
1679          "Use adaptive survivor sizing policies")                          \
1680                                                                            \
1681  product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true,     \
1682          "Use adaptive young-old sizing policies at minor collections")    \
1683                                                                            \
1684  product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true,     \
1685          "Use adaptive young-old sizing policies at major collections")    \
1686                                                                            \
1687  product(bool, UseAdaptiveSizePolicyWithSystemGC, false,                   \
1688          "Use statistics from System.GC for adaptive size policy")         \
1689                                                                            \
1690  product(bool, UseAdaptiveGCBoundary, false,                               \
1691          "Allow young-old boundary to move")                               \
1692                                                                            \
1693  develop(bool, TraceAdaptiveGCBoundary, false,                             \
1694          "Trace young-old boundary moves")                                 \
1695                                                                            \
1696  develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1,             \
1697          "Resize the virtual spaces of the young or old generations")      \
1698                                                                            \
1699  product(uintx, AdaptiveSizeThroughPutPolicy, 0,                           \
1700          "Policy for changeing generation size for throughput goals")      \
1701                                                                            \
1702  product(uintx, AdaptiveSizePausePolicy, 0,                                \
1703          "Policy for changing generation size for pause goals")            \
1704                                                                            \
1705  develop(bool, PSAdjustTenuredGenForMinorPause, false,                     \
1706          "Adjust tenured generation to achive a minor pause goal")         \
1707                                                                            \
1708  develop(bool, PSAdjustYoungGenForMajorPause, false,                       \
1709          "Adjust young generation to achive a major pause goal")           \
1710                                                                            \
1711  product(uintx, AdaptiveSizePolicyInitializingSteps, 20,                   \
1712          "Number of steps where heuristics is used before data is used")   \
1713                                                                            \
1714  develop(uintx, AdaptiveSizePolicyReadyThreshold, 5,                       \
1715          "Number of collections before the adaptive sizing is started")    \
1716                                                                            \
1717  product(uintx, AdaptiveSizePolicyOutputInterval, 0,                       \
1718          "Collecton interval for printing information, zero => never")     \
1719                                                                            \
1720  product(bool, UseAdaptiveSizePolicyFootprintGoal, true,                   \
1721          "Use adaptive minimum footprint as a goal")                       \
1722                                                                            \
1723  product(uintx, AdaptiveSizePolicyWeight, 10,                              \
1724          "Weight given to exponential resizing, between 0 and 100")        \
1725                                                                            \
1726  product(uintx, AdaptiveTimeWeight,       25,                              \
1727          "Weight given to time in adaptive policy, between 0 and 100")     \
1728                                                                            \
1729  product(uintx, PausePadding, 1,                                           \
1730          "How much buffer to keep for pause time")                         \
1731                                                                            \
1732  product(uintx, PromotedPadding, 3,                                        \
1733          "How much buffer to keep for promotion failure")                  \
1734                                                                            \
1735  product(uintx, SurvivorPadding, 3,                                        \
1736          "How much buffer to keep for survivor overflow")                  \
1737                                                                            \
1738  product(uintx, AdaptivePermSizeWeight, 20,                                \
1739          "Weight for perm gen exponential resizing, between 0 and 100")    \
1740                                                                            \
1741  product(uintx, PermGenPadding, 3,                                         \
1742          "How much buffer to keep for perm gen sizing")                    \
1743                                                                            \
1744  product(uintx, ThresholdTolerance, 10,                                    \
1745          "Allowed collection cost difference between generations")         \
1746                                                                            \
1747  product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50,                \
1748          "If collection costs are within margin, reduce both by full delta") \
1749                                                                            \
1750  product(uintx, YoungGenerationSizeIncrement, 20,                          \
1751          "Adaptive size percentage change in young generation")            \
1752                                                                            \
1753  product(uintx, YoungGenerationSizeSupplement, 80,                         \
1754          "Supplement to YoungedGenerationSizeIncrement used at startup")   \
1755                                                                            \
1756  product(uintx, YoungGenerationSizeSupplementDecay, 8,                     \
1757          "Decay factor to YoungedGenerationSizeSupplement")                \
1758                                                                            \
1759  product(uintx, TenuredGenerationSizeIncrement, 20,                        \
1760          "Adaptive size percentage change in tenured generation")          \
1761                                                                            \
1762  product(uintx, TenuredGenerationSizeSupplement, 80,                       \
1763          "Supplement to TenuredGenerationSizeIncrement used at startup")   \
1764                                                                            \
1765  product(uintx, TenuredGenerationSizeSupplementDecay, 2,                   \
1766          "Decay factor to TenuredGenerationSizeIncrement")                 \
1767                                                                            \
1768  product(uintx, MaxGCPauseMillis, max_uintx,                               \
1769          "Adaptive size policy maximum GC pause time goal in msec")        \
1770                                                                            \
1771  product(uintx, MaxGCMinorPauseMillis, max_uintx,                          \
1772          "Adaptive size policy maximum GC minor pause time goal in msec")  \
1773                                                                            \
1774  product(uintx, GCTimeRatio, 99,                                           \
1775          "Adaptive size policy application time to GC time ratio")         \
1776                                                                            \
1777  product(uintx, AdaptiveSizeDecrementScaleFactor, 4,                       \
1778          "Adaptive size scale down factor for shrinking")                  \
1779                                                                            \
1780  product(bool, UseAdaptiveSizeDecayMajorGCCost, true,                      \
1781          "Adaptive size decays the major cost for long major intervals")   \
1782                                                                            \
1783  product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10,                     \
1784          "Time scale over which major costs decay")                        \
1785                                                                            \
1786  product(uintx, MinSurvivorRatio, 3,                                       \
1787          "Minimum ratio of young generation/survivor space size")          \
1788                                                                            \
1789  product(uintx, InitialSurvivorRatio, 8,                                   \
1790          "Initial ratio of eden/survivor space size")                      \
1791                                                                            \
1792  product(uintx, BaseFootPrintEstimate, 256*M,                              \
1793          "Estimate of footprint other than Java Heap")                     \
1794                                                                            \
1795  product(bool, UseGCOverheadLimit, true,                                   \
1796          "Use policy to limit of proportion of time spent in GC "          \
1797          "before an OutOfMemory error is thrown")                          \
1798                                                                            \
1799  product(uintx, GCTimeLimit, 98,                                           \
1800          "Limit of proportion of time spent in GC before an OutOfMemory"   \
1801          "error is thrown (used with GCHeapFreeLimit)")                    \
1802                                                                            \
1803  product(uintx, GCHeapFreeLimit, 2,                                        \
1804          "Minimum percentage of free space after a full GC before an "     \
1805          "OutOfMemoryError is thrown (used with GCTimeLimit)")             \
1806                                                                            \
1807  develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5,                 \
1808          "Number of consecutive collections before gc time limit fires")   \
1809                                                                            \
1810  product(bool, PrintAdaptiveSizePolicy, false,                             \
1811          "Print information about AdaptiveSizePolicy")                     \
1812                                                                            \
1813  product(intx, PrefetchCopyIntervalInBytes, -1,                            \
1814          "How far ahead to prefetch destination area (<= 0 means off)")    \
1815                                                                            \
1816  product(intx, PrefetchScanIntervalInBytes, -1,                            \
1817          "How far ahead to prefetch scan area (<= 0 means off)")           \
1818                                                                            \
1819  product(intx, PrefetchFieldsAhead, -1,                                    \
1820          "How many fields ahead to prefetch in oop scan (<= 0 means off)") \
1821                                                                            \
1822  develop(bool, UsePrefetchQueue, true,                                     \
1823          "Use the prefetch queue during PS promotion")                     \
1824                                                                            \
1825  diagnostic(bool, VerifyBeforeExit, trueInDebug,                           \
1826          "Verify system before exiting")                                   \
1827                                                                            \
1828  diagnostic(bool, VerifyBeforeGC, false,                                   \
1829          "Verify memory system before GC")                                 \
1830                                                                            \
1831  diagnostic(bool, VerifyAfterGC, false,                                    \
1832          "Verify memory system after GC")                                  \
1833                                                                            \
1834  diagnostic(bool, VerifyDuringGC, false,                                   \
1835          "Verify memory system during GC (between phases)")                \
1836                                                                            \
1837  diagnostic(bool, GCParallelVerificationEnabled, true,                     \
1838          "Enable parallel memory system verification")                     \
1839                                                                            \
1840  diagnostic(bool, VerifyRememberedSets, false,                             \
1841          "Verify GC remembered sets")                                      \
1842                                                                            \
1843  diagnostic(bool, VerifyObjectStartArray, true,                            \
1844          "Verify GC object start array if verify before/after")            \
1845                                                                            \
1846  product(bool, DisableExplicitGC, false,                                   \
1847          "Tells whether calling System.gc() does a full GC")               \
1848                                                                            \
1849  notproduct(bool, CheckMemoryInitialization, false,                        \
1850          "Checks memory initialization")                                   \
1851                                                                            \
1852  product(bool, CollectGen0First, false,                                    \
1853          "Collect youngest generation before each full GC")                \
1854                                                                            \
1855  diagnostic(bool, BindCMSThreadToCPU, false,                               \
1856          "Bind CMS Thread to CPU if possible")                             \
1857                                                                            \
1858  diagnostic(uintx, CPUForCMSThread, 0,                                     \
1859          "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
1860                                                                            \
1861  product(bool, BindGCTaskThreadsToCPUs, false,                             \
1862          "Bind GCTaskThreads to CPUs if possible")                         \
1863                                                                            \
1864  product(bool, UseGCTaskAffinity, false,                                   \
1865          "Use worker affinity when asking for GCTasks")                    \
1866                                                                            \
1867  product(uintx, ProcessDistributionStride, 4,                              \
1868          "Stride through processors when distributing processes")          \
1869                                                                            \
1870  product(uintx, CMSCoordinatorYieldSleepCount, 10,                         \
1871          "number of times the coordinator GC thread will sleep while "     \
1872          "yielding before giving up and resuming GC")                      \
1873                                                                            \
1874  product(uintx, CMSYieldSleepCount, 0,                                     \
1875          "number of times a GC thread (minus the coordinator) "            \
1876          "will sleep while yielding before giving up and resuming GC")     \
1877                                                                            \
1878  notproduct(bool, PrintFlagsFinal, false,                                  \
1879          "Print all command line flags after argument processing")         \
1880                                                                            \
1881  /* gc tracing */                                                          \
1882  manageable(bool, PrintGC, false,                                          \
1883          "Print message at garbage collect")                               \
1884                                                                            \
1885  manageable(bool, PrintGCDetails, false,                                   \
1886          "Print more details at garbage collect")                          \
1887                                                                            \
1888  manageable(bool, PrintGCDateStamps, false,                                \
1889          "Print date stamps at garbage collect")                           \
1890                                                                            \
1891  manageable(bool, PrintGCTimeStamps, false,                                \
1892          "Print timestamps at garbage collect")                            \
1893                                                                            \
1894  product(bool, PrintGCTaskTimeStamps, false,                               \
1895          "Print timestamps for individual gc worker thread tasks")         \
1896                                                                            \
1897  develop(intx, ConcGCYieldTimeout, 0,                                      \
1898          "If non-zero, assert that GC threads yield within this # of ms.") \
1899                                                                            \
1900  notproduct(bool, TraceMarkSweep, false,                                   \
1901          "Trace mark sweep")                                               \
1902                                                                            \
1903  product(bool, PrintReferenceGC, false,                                    \
1904          "Print times spent handling reference objects during GC "         \
1905          " (enabled only when PrintGCDetails)")                            \
1906                                                                            \
1907  develop(bool, TraceReferenceGC, false,                                    \
1908          "Trace handling of soft/weak/final/phantom references")           \
1909                                                                            \
1910  develop(bool, TraceFinalizerRegistration, false,                          \
1911         "Trace registration of final references")                          \
1912                                                                            \
1913  notproduct(bool, TraceScavenge, false,                                    \
1914          "Trace scavenge")                                                 \
1915                                                                            \
1916  product_rw(bool, TraceClassLoading, false,                                \
1917          "Trace all classes loaded")                                       \
1918                                                                            \
1919  product(bool, TraceClassLoadingPreorder, false,                           \
1920          "Trace all classes loaded in order referenced (not loaded)")      \
1921                                                                            \
1922  product_rw(bool, TraceClassUnloading, false,                              \
1923          "Trace unloading of classes")                                     \
1924                                                                            \
1925  product_rw(bool, TraceLoaderConstraints, false,                           \
1926          "Trace loader constraints")                                       \
1927                                                                            \
1928  product(bool, TraceGen0Time, false,                                       \
1929          "Trace accumulated time for Gen 0 collection")                    \
1930                                                                            \
1931  product(bool, TraceGen1Time, false,                                       \
1932          "Trace accumulated time for Gen 1 collection")                    \
1933                                                                            \
1934  product(bool, PrintTenuringDistribution, false,                           \
1935          "Print tenuring age information")                                 \
1936                                                                            \
1937  product_rw(bool, PrintHeapAtGC, false,                                    \
1938          "Print heap layout before and after each GC")                     \
1939                                                                            \
1940  product(bool, PrintHeapAtSIGBREAK, true,                                  \
1941          "Print heap layout in response to SIGBREAK")                      \
1942                                                                            \
1943  manageable(bool, PrintClassHistogram, false,                              \
1944          "Print a histogram of class instances")                           \
1945                                                                            \
1946  develop(bool, TraceWorkGang, false,                                       \
1947          "Trace activities of work gangs")                                 \
1948                                                                            \
1949  product(bool, TraceParallelOldGCTasks, false,                             \
1950          "Trace multithreaded GC activity")                                \
1951                                                                            \
1952  develop(bool, TraceBlockOffsetTable, false,                               \
1953          "Print BlockOffsetTable maps")                                    \
1954                                                                            \
1955  develop(bool, TraceCardTableModRefBS, false,                              \
1956          "Print CardTableModRefBS maps")                                   \
1957                                                                            \
1958  develop(bool, TraceGCTaskManager, false,                                  \
1959          "Trace actions of the GC task manager")                           \
1960                                                                            \
1961  develop(bool, TraceGCTaskQueue, false,                                    \
1962          "Trace actions of the GC task queues")                            \
1963                                                                            \
1964  develop(bool, TraceGCTaskThread, false,                                   \
1965          "Trace actions of the GC task threads")                           \
1966                                                                            \
1967  product(bool, PrintParallelOldGCPhaseTimes, false,                        \
1968          "Print the time taken by each parallel old gc phase."             \
1969          "PrintGCDetails must also be enabled.")                           \
1970                                                                            \
1971  develop(bool, TraceParallelOldGCMarkingPhase, false,                      \
1972          "Trace parallel old gc marking phase")                            \
1973                                                                            \
1974  develop(bool, TraceParallelOldGCSummaryPhase, false,                      \
1975          "Trace parallel old gc summary phase")                            \
1976                                                                            \
1977  develop(bool, TraceParallelOldGCCompactionPhase, false,                   \
1978          "Trace parallel old gc compaction phase")                         \
1979                                                                            \
1980  develop(bool, TraceParallelOldGCDensePrefix, false,                       \
1981          "Trace parallel old gc dense prefix computation")                 \
1982                                                                            \
1983  develop(bool, IgnoreLibthreadGPFault, false,                              \
1984          "Suppress workaround for libthread GP fault")                     \
1985                                                                            \
1986  product(bool, PrintJNIGCStalls, false,                                    \
1987          "Print diagnostic message when GC is stalled"                     \
1988          "by JNI critical section")                                        \
1989                                                                            \
1990  /* JVMTI heap profiling */                                                \
1991                                                                            \
1992  diagnostic(bool, TraceJVMTIObjectTagging, false,                          \
1993          "Trace JVMTI object tagging calls")                               \
1994                                                                            \
1995  diagnostic(bool, VerifyBeforeIteration, false,                            \
1996          "Verify memory system before JVMTI iteration")                    \
1997                                                                            \
1998  /* compiler interface */                                                  \
1999                                                                            \
2000  develop(bool, CIPrintCompilerName, false,                                 \
2001          "when CIPrint is active, print the name of the active compiler")  \
2002                                                                            \
2003  develop(bool, CIPrintCompileQueue, false,                                 \
2004          "display the contents of the compile queue whenever a "           \
2005          "compilation is enqueued")                                        \
2006                                                                            \
2007  develop(bool, CIPrintRequests, false,                                     \
2008          "display every request for compilation")                          \
2009                                                                            \
2010  product(bool, CITime, false,                                              \
2011          "collect timing information for compilation")                     \
2012                                                                            \
2013  develop(bool, CITimeEach, false,                                          \
2014          "display timing information after each successful compilation")   \
2015                                                                            \
2016  develop(bool, CICountOSR, true,                                           \
2017          "use a separate counter when assigning ids to osr compilations")  \
2018                                                                            \
2019  develop(bool, CICompileNatives, true,                                     \
2020          "compile native methods if supported by the compiler")            \
2021                                                                            \
2022  develop_pd(bool, CICompileOSR,                                            \
2023          "compile on stack replacement methods if supported by the "       \
2024          "compiler")                                                       \
2025                                                                            \
2026  develop(bool, CIPrintMethodCodes, false,                                  \
2027          "print method bytecodes of the compiled code")                    \
2028                                                                            \
2029  develop(bool, CIPrintTypeFlow, false,                                     \
2030          "print the results of ciTypeFlow analysis")                       \
2031                                                                            \
2032  develop(bool, CITraceTypeFlow, false,                                     \
2033          "detailed per-bytecode tracing of ciTypeFlow analysis")           \
2034                                                                            \
2035  develop(intx, CICloneLoopTestLimit, 100,                                  \
2036          "size limit for blocks heuristically cloned in ciTypeFlow")       \
2037                                                                            \
2038  /* temp diagnostics */                                                    \
2039                                                                            \
2040  diagnostic(bool, TraceRedundantCompiles, false,                           \
2041          "Have compile broker print when a request already in the queue is"\
2042          " requested again")                                               \
2043                                                                            \
2044  diagnostic(bool, InitialCompileFast, false,                               \
2045          "Initial compile at CompLevel_fast_compile")                      \
2046                                                                            \
2047  diagnostic(bool, InitialCompileReallyFast, false,                         \
2048          "Initial compile at CompLevel_really_fast_compile (no profile)")  \
2049                                                                            \
2050  diagnostic(bool, FullProfileOnReInterpret, true,                          \
2051          "On re-interpret unc-trap compile next at CompLevel_fast_compile")\
2052                                                                            \
2053  /* compiler */                                                            \
2054                                                                            \
2055  product(intx, CICompilerCount, CI_COMPILER_COUNT,                         \
2056          "Number of compiler threads to run")                              \
2057                                                                            \
2058  product(intx, CompilationPolicyChoice, 0,                                 \
2059          "which compilation policy (0/1)")                                 \
2060                                                                            \
2061  develop(bool, UseStackBanging, true,                                      \
2062          "use stack banging for stack overflow checks (required for "      \
2063          "proper StackOverflow handling; disable only to measure cost "    \
2064          "of stackbanging)")                                               \
2065                                                                            \
2066  develop(bool, Use24BitFPMode, true,                                       \
2067          "Set 24-bit FPU mode on a per-compile basis ")                    \
2068                                                                            \
2069  develop(bool, Use24BitFP, true,                                           \
2070          "use FP instructions that produce 24-bit precise results")        \
2071                                                                            \
2072  develop(bool, UseStrictFP, true,                                          \
2073          "use strict fp if modifier strictfp is set")                      \
2074                                                                            \
2075  develop(bool, GenerateSynchronizationCode, true,                          \
2076          "generate locking/unlocking code for synchronized methods and "   \
2077          "monitors")                                                       \
2078                                                                            \
2079  develop(bool, GenerateCompilerNullChecks, true,                           \
2080          "Generate explicit null checks for loads/stores/calls")           \
2081                                                                            \
2082  develop(bool, GenerateRangeChecks, true,                                  \
2083          "Generate range checks for array accesses")                       \
2084                                                                            \
2085  develop_pd(bool, ImplicitNullChecks,                                      \
2086          "generate code for implicit null checks")                         \
2087                                                                            \
2088  product(bool, PrintSafepointStatistics, false,                            \
2089          "print statistics about safepoint synchronization")               \
2090                                                                            \
2091  product(intx, PrintSafepointStatisticsCount, 300,                         \
2092          "total number of safepoint statistics collected "                 \
2093          "before printing them out")                                       \
2094                                                                            \
2095  product(intx, PrintSafepointStatisticsTimeout,  -1,                       \
2096          "print safepoint statistics only when safepoint takes"            \
2097          " more than PrintSafepointSatisticsTimeout in millis")            \
2098                                                                            \
2099  develop(bool, InlineAccessors, true,                                      \
2100          "inline accessor methods (get/set)")                              \
2101                                                                            \
2102  product(bool, Inline, true,                                               \
2103          "enable inlining")                                                \
2104                                                                            \
2105  product(bool, ClipInlining, true,                                         \
2106          "clip inlining if aggregate method exceeds DesiredMethodLimit")   \
2107                                                                            \
2108  develop(bool, UseCHA, true,                                               \
2109          "enable CHA")                                                     \
2110                                                                            \
2111  product(bool, UseTypeProfile, true,                                       \
2112          "Check interpreter profile for historically monomorphic calls")   \
2113                                                                            \
2114  product(intx, TypeProfileMajorReceiverPercent, 90,                        \
2115          "% of major receiver type to all profiled receivers")             \
2116                                                                            \
2117  notproduct(bool, TimeCompiler, false,                                     \
2118          "time the compiler")                                              \
2119                                                                            \
2120  notproduct(bool, TimeCompiler2, false,                                    \
2121          "detailed time the compiler (requires +TimeCompiler)")            \
2122                                                                            \
2123  diagnostic(bool, PrintInlining, false,                                    \
2124          "prints inlining optimizations")                                  \
2125                                                                            \
2126  diagnostic(bool, PrintIntrinsics, false,                                  \
2127          "prints attempted and successful inlining of intrinsics")         \
2128                                                                            \
2129  diagnostic(ccstrlist, DisableIntrinsic, "",                               \
2130          "do not expand intrinsics whose (internal) names appear here")    \
2131                                                                            \
2132  develop(bool, StressReflectiveCode, false,                                \
2133          "Use inexact types at allocations, etc., to test reflection")     \
2134                                                                            \
2135  develop(bool, EagerInitialization, false,                                 \
2136          "Eagerly initialize classes if possible")                         \
2137                                                                            \
2138  product(bool, Tier1UpdateMethodData, trueInTiered,                        \
2139          "Update methodDataOops in Tier1-generated code")                  \
2140                                                                            \
2141  develop(bool, TraceMethodReplacement, false,                              \
2142          "Print when methods are replaced do to recompilation")            \
2143                                                                            \
2144  develop(bool, PrintMethodFlushing, false,                                 \
2145          "print the nmethods being flushed")                               \
2146                                                                            \
2147  notproduct(bool, LogMultipleMutexLocking, false,                          \
2148          "log locking and unlocking of mutexes (only if multiple locks "   \
2149          "are held)")                                                      \
2150                                                                            \
2151  develop(bool, UseRelocIndex, false,                                       \
2152         "use an index to speed random access to relocations")              \
2153                                                                            \
2154  develop(bool, StressCodeBuffers, false,                                   \
2155         "Exercise code buffer expansion and other rare state changes")     \
2156                                                                            \
2157  diagnostic(bool, DebugNonSafepoints, trueInDebug,                         \
2158         "Generate extra debugging info for non-safepoints in nmethods")    \
2159                                                                            \
2160  diagnostic(bool, DebugInlinedCalls, true,                                 \
2161         "If false, restricts profiled locations to the root method only")  \
2162                                                                            \
2163  product(bool, PrintVMOptions, trueInDebug,                                \
2164         "print VM flag settings")                                          \
2165                                                                            \
2166  diagnostic(bool, SerializeVMOutput, true,                                 \
2167         "Use a mutex to serialize output to tty and hotspot.log")          \
2168                                                                            \
2169  diagnostic(bool, DisplayVMOutput, true,                                   \
2170         "Display all VM output on the tty, independently of LogVMOutput")  \
2171                                                                            \
2172  diagnostic(bool, LogVMOutput, trueInDebug,                                \
2173         "Save VM output to hotspot.log, or to LogFile")                    \
2174                                                                            \
2175  diagnostic(ccstr, LogFile, NULL,                                          \
2176         "If LogVMOutput is on, save VM output to this file [hotspot.log]") \
2177                                                                            \
2178  product(ccstr, ErrorFile, NULL,                                           \
2179         "If an error occurs, save the error data to this file "            \
2180         "[default: ./hs_err_pid%p.log] (%p replaced with pid)")            \
2181                                                                            \
2182  product(bool, DisplayVMOutputToStderr, false,                             \
2183         "If DisplayVMOutput is true, display all VM output to stderr")     \
2184                                                                            \
2185  product(bool, DisplayVMOutputToStdout, false,                             \
2186         "If DisplayVMOutput is true, display all VM output to stdout")     \
2187                                                                            \
2188  product(bool, UseHeavyMonitors, false,                                    \
2189          "use heavyweight instead of lightweight Java monitors")           \
2190                                                                            \
2191  notproduct(bool, PrintSymbolTableSizeHistogram, false,                    \
2192          "print histogram of the symbol table")                            \
2193                                                                            \
2194  notproduct(bool, ExitVMOnVerifyError, false,                              \
2195          "standard exit from VM if bytecode verify error "                 \
2196          "(only in debug mode)")                                           \
2197                                                                            \
2198  notproduct(ccstr, AbortVMOnException, NULL,                               \
2199          "Call fatal if this exception is thrown.  Example: "              \
2200          "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \
2201                                                                            \
2202  develop(bool, DebugVtables, false,                                        \
2203          "add debugging code to vtable dispatch")                          \
2204                                                                            \
2205  develop(bool, PrintVtables, false,                                        \
2206          "print vtables when printing klass")                              \
2207                                                                            \
2208  notproduct(bool, PrintVtableStats, false,                                 \
2209          "print vtables stats at end of run")                              \
2210                                                                            \
2211  develop(bool, TraceCreateZombies, false,                                  \
2212          "trace creation of zombie nmethods")                              \
2213                                                                            \
2214  notproduct(bool, IgnoreLockingAssertions, false,                          \
2215          "disable locking assertions (for speed)")                         \
2216                                                                            \
2217  notproduct(bool, VerifyLoopOptimizations, false,                          \
2218          "verify major loop optimizations")                                \
2219                                                                            \
2220  product(bool, RangeCheckElimination, true,                                \
2221          "Split loop iterations to eliminate range checks")                \
2222                                                                            \
2223  develop_pd(bool, UncommonNullCast,                                        \
2224          "track occurrences of null in casts; adjust compiler tactics")    \
2225                                                                            \
2226  develop(bool, TypeProfileCasts,  true,                                    \
2227          "treat casts like calls for purposes of type profiling")          \
2228                                                                            \
2229  develop(bool, MonomorphicArrayCheck, true,                                \
2230          "Uncommon-trap array store checks that require full type check")  \
2231                                                                            \
2232  develop(bool, DelayCompilationDuringStartup, true,                        \
2233          "Delay invoking the compiler until main application class is "    \
2234          "loaded")                                                         \
2235                                                                            \
2236  develop(bool, CompileTheWorld, false,                                     \
2237          "Compile all methods in all classes in bootstrap class path "     \
2238          "(stress test)")                                                  \
2239                                                                            \
2240  develop(bool, CompileTheWorldPreloadClasses, true,                        \
2241          "Preload all classes used by a class before start loading")       \
2242                                                                            \
2243  notproduct(bool, CompileTheWorldIgnoreInitErrors, false,                  \
2244          "Compile all methods although class initializer failed")          \
2245                                                                            \
2246  develop(bool, TraceIterativeGVN, false,                                   \
2247          "Print progress during Iterative Global Value Numbering")         \
2248                                                                            \
2249  develop(bool, FillDelaySlots, true,                                       \
2250          "Fill delay slots (on SPARC only)")                               \
2251                                                                            \
2252  develop(bool, VerifyIterativeGVN, false,                                  \
2253          "Verify Def-Use modifications during sparse Iterative Global "    \
2254          "Value Numbering")                                                \
2255                                                                            \
2256  notproduct(bool, TracePhaseCCP, false,                                    \
2257          "Print progress during Conditional Constant Propagation")         \
2258                                                                            \
2259  develop(bool, TimeLivenessAnalysis, false,                                \
2260          "Time computation of bytecode liveness analysis")                 \
2261                                                                            \
2262  develop(bool, TraceLivenessGen, false,                                    \
2263          "Trace the generation of liveness analysis information")          \
2264                                                                            \
2265  notproduct(bool, TraceLivenessQuery, false,                               \
2266          "Trace queries of liveness analysis information")                 \
2267                                                                            \
2268  notproduct(bool, CollectIndexSetStatistics, false,                        \
2269          "Collect information about IndexSets")                            \
2270                                                                            \
2271  develop(bool, PrintDominators, false,                                     \
2272          "Print out dominator trees for GVN")                              \
2273                                                                            \
2274  develop(bool, UseLoopSafepoints, true,                                    \
2275          "Generate Safepoint nodes in every loop")                         \
2276                                                                            \
2277  notproduct(bool, TraceCISCSpill, false,                                   \
2278          "Trace allocators use of cisc spillable instructions")            \
2279                                                                            \
2280  notproduct(bool, TraceSpilling, false,                                    \
2281          "Trace spilling")                                                 \
2282                                                                            \
2283  develop(bool, DeutschShiffmanExceptions, true,                            \
2284          "Fast check to find exception handler for precisely typed "       \
2285          "exceptions")                                                     \
2286                                                                            \
2287  product(bool, SplitIfBlocks, true,                                        \
2288          "Clone compares and control flow through merge points to fold "   \
2289          "some branches")                                                  \
2290                                                                            \
2291  develop(intx, FastAllocateSizeLimit, 128*K,                               \
2292          /* Note:  This value is zero mod 1<<13 for a cheap sparc set. */  \
2293          "Inline allocations larger than this in doublewords must go slow")\
2294                                                                            \
2295  product(bool, AggressiveOpts, false,                                      \
2296          "Enable aggressive optimizations - see arguments.cpp")            \
2297                                                                            \
2298  product(bool, UseStringCache, false,                                      \
2299          "Enable String cache capabilities on String.java")                \
2300                                                                            \
2301  /* statistics */                                                          \
2302  develop(bool, UseVTune, false,                                            \
2303          "enable support for Intel's VTune profiler")                      \
2304                                                                            \
2305  develop(bool, CountCompiledCalls, false,                                  \
2306          "counts method invocations")                                      \
2307                                                                            \
2308  notproduct(bool, CountRuntimeCalls, false,                                \
2309          "counts VM runtime calls")                                        \
2310                                                                            \
2311  develop(bool, CountJNICalls, false,                                       \
2312          "counts jni method invocations")                                  \
2313                                                                            \
2314  notproduct(bool, CountJVMCalls, false,                                    \
2315          "counts jvm method invocations")                                  \
2316                                                                            \
2317  notproduct(bool, CountRemovableExceptions, false,                         \
2318          "count exceptions that could be replaced by branches due to "     \
2319          "inlining")                                                       \
2320                                                                            \
2321  notproduct(bool, ICMissHistogram, false,                                  \
2322          "produce histogram of IC misses")                                 \
2323                                                                            \
2324  notproduct(bool, PrintClassStatistics, false,                             \
2325          "prints class statistics at end of run")                          \
2326                                                                            \
2327  notproduct(bool, PrintMethodStatistics, false,                            \
2328          "prints method statistics at end of run")                         \
2329                                                                            \
2330  /* interpreter */                                                         \
2331  develop(bool, ClearInterpreterLocals, false,                              \
2332          "Always clear local variables of interpreter activations upon "   \
2333          "entry")                                                          \
2334                                                                            \
2335  product_pd(bool, RewriteBytecodes,                                        \
2336          "Allow rewriting of bytecodes (bytecodes are not immutable)")     \
2337                                                                            \
2338  product_pd(bool, RewriteFrequentPairs,                                    \
2339          "Rewrite frequently used bytecode pairs into a single bytecode")  \
2340                                                                            \
2341  diagnostic(bool, PrintInterpreter, false,                                 \
2342          "Prints the generated interpreter code")                          \
2343                                                                            \
2344  product(bool, UseInterpreter, true,                                       \
2345          "Use interpreter for non-compiled methods")                       \
2346                                                                            \
2347  develop(bool, UseFastSignatureHandlers, true,                             \
2348          "Use fast signature handlers for native calls")                   \
2349                                                                            \
2350  develop(bool, UseV8InstrsOnly, false,                                     \
2351          "Use SPARC-V8 Compliant instruction subset")                      \
2352                                                                            \
2353  product(bool, UseNiagaraInstrs, false,                                    \
2354          "Use Niagara-efficient instruction subset")                       \
2355                                                                            \
2356  develop(bool, UseCASForSwap, false,                                       \
2357          "Do not use swap instructions, but only CAS (in a loop) on SPARC")\
2358                                                                            \
2359  product(bool, UseLoopCounter, true,                                       \
2360          "Increment invocation counter on backward branch")                \
2361                                                                            \
2362  product(bool, UseFastEmptyMethods, true,                                  \
2363          "Use fast method entry code for empty methods")                   \
2364                                                                            \
2365  product(bool, UseFastAccessorMethods, true,                               \
2366          "Use fast method entry code for accessor methods")                \
2367                                                                            \
2368  product_pd(bool, UseOnStackReplacement,                                   \
2369           "Use on stack replacement, calls runtime if invoc. counter "     \
2370           "overflows in loop")                                             \
2371                                                                            \
2372  notproduct(bool, TraceOnStackReplacement, false,                          \
2373          "Trace on stack replacement")                                     \
2374                                                                            \
2375  develop(bool, PoisonOSREntry, true,                                       \
2376           "Detect abnormal calls to OSR code")                             \
2377                                                                            \
2378  product_pd(bool, PreferInterpreterNativeStubs,                            \
2379          "Use always interpreter stubs for native methods invoked via "    \
2380          "interpreter")                                                    \
2381                                                                            \
2382  develop(bool, CountBytecodes, false,                                      \
2383          "Count number of bytecodes executed")                             \
2384                                                                            \
2385  develop(bool, PrintBytecodeHistogram, false,                              \
2386          "Print histogram of the executed bytecodes")                      \
2387                                                                            \
2388  develop(bool, PrintBytecodePairHistogram, false,                          \
2389          "Print histogram of the executed bytecode pairs")                 \
2390                                                                            \
2391  diagnostic(bool, PrintSignatureHandlers, false,                           \
2392          "Print code generated for native method signature handlers")      \
2393                                                                            \
2394  develop(bool, VerifyOops, false,                                          \
2395          "Do plausibility checks for oops")                                \
2396                                                                            \
2397  develop(bool, CheckUnhandledOops, false,                                  \
2398          "Check for unhandled oops in VM code")                            \
2399                                                                            \
2400  develop(bool, VerifyJNIFields, trueInDebug,                               \
2401          "Verify jfieldIDs for instance fields")                           \
2402                                                                            \
2403  notproduct(bool, VerifyJNIEnvThread, false,                               \
2404          "Verify JNIEnv.thread == Thread::current() when entering VM "     \
2405          "from JNI")                                                       \
2406                                                                            \
2407  develop(bool, VerifyFPU, false,                                           \
2408          "Verify FPU state (check for NaN's, etc.)")                       \
2409                                                                            \
2410  develop(bool, VerifyThread, false,                                        \
2411          "Watch the thread register for corruption (SPARC only)")          \
2412                                                                            \
2413  develop(bool, VerifyActivationFrameSize, false,                           \
2414          "Verify that activation frame didn't become smaller than its "    \
2415          "minimal size")                                                   \
2416                                                                            \
2417  develop(bool, TraceFrequencyInlining, false,                              \
2418          "Trace frequency based inlining")                                 \
2419                                                                            \
2420  notproduct(bool, TraceTypeProfile, false,                                 \
2421          "Trace type profile")                                             \
2422                                                                            \
2423  develop_pd(bool, InlineIntrinsics,                                        \
2424           "Inline intrinsics that can be statically resolved")             \
2425                                                                            \
2426  product_pd(bool, ProfileInterpreter,                                      \
2427           "Profile at the bytecode level during interpretation")           \
2428                                                                            \
2429  develop_pd(bool, ProfileTraps,                                            \
2430          "Profile deoptimization traps at the bytecode level")             \
2431                                                                            \
2432  product(intx, ProfileMaturityPercentage, 20,                              \
2433          "number of method invocations/branches (expressed as % of "       \
2434          "CompileThreshold) before using the method's profile")            \
2435                                                                            \
2436  develop(bool, PrintMethodData, false,                                     \
2437           "Print the results of +ProfileInterpreter at end of run")        \
2438                                                                            \
2439  develop(bool, VerifyDataPointer, trueInDebug,                             \
2440          "Verify the method data pointer during interpreter profiling")    \
2441                                                                            \
2442  develop(bool, VerifyCompiledCode, false,                                  \
2443          "Include miscellaneous runtime verifications in nmethod code; "   \
2444          "off by default because it disturbs nmethod size heuristics.")    \
2445                                                                            \
2446                                                                            \
2447  /* compilation */                                                         \
2448  product(bool, UseCompiler, true,                                          \
2449          "use compilation")                                                \
2450                                                                            \
2451  develop(bool, TraceCompilationPolicy, false,                              \
2452          "Trace compilation policy")                                       \
2453                                                                            \
2454  develop(bool, TimeCompilationPolicy, false,                               \
2455          "Time the compilation policy")                                    \
2456                                                                            \
2457  product(bool, UseCounterDecay, true,                                      \
2458           "adjust recompilation counters")                                 \
2459                                                                            \
2460  develop(intx, CounterHalfLifeTime,    30,                                 \
2461          "half-life time of invocation counters (in secs)")                \
2462                                                                            \
2463  develop(intx, CounterDecayMinIntervalLength,   500,                       \
2464          "Min. ms. between invocation of CounterDecay")                    \
2465                                                                            \
2466  product(bool, AlwaysCompileLoopMethods, false,                            \
2467          "when using recompilation, never interpret methods "              \
2468          "containing loops")                                               \
2469                                                                            \
2470  product(bool, DontCompileHugeMethods, true,                               \
2471          "don't compile methods > HugeMethodLimit")                        \
2472                                                                            \
2473  /* Bytecode escape analysis estimation. */                                \
2474  product(bool, EstimateArgEscape, true,                                    \
2475          "Analyze bytecodes to estimate escape state of arguments")        \
2476                                                                            \
2477  product(intx, BCEATraceLevel, 0,                                          \
2478          "How much tracing to do of bytecode escape analysis estimates")   \
2479                                                                            \
2480  product(intx, MaxBCEAEstimateLevel, 5,                                    \
2481          "Maximum number of nested calls that are analyzed by BC EA.")     \
2482                                                                            \
2483  product(intx, MaxBCEAEstimateSize, 150,                                   \
2484          "Maximum bytecode size of a method to be analyzed by BC EA.")     \
2485                                                                            \
2486  product(intx,  AllocatePrefetchStyle, 1,                                  \
2487          "0 = no prefetch, "                                               \
2488          "1 = prefetch instructions for each allocation, "                 \
2489          "2 = use TLAB watermark to gate allocation prefetch")             \
2490                                                                            \
2491  product(intx,  AllocatePrefetchDistance, -1,                              \
2492          "Distance to prefetch ahead of allocation pointer")               \
2493                                                                            \
2494  product(intx,  AllocatePrefetchLines, 1,                                  \
2495          "Number of lines to prefetch ahead of allocation pointer")        \
2496                                                                            \
2497  product(intx,  AllocatePrefetchStepSize, 16,                              \
2498          "Step size in bytes of sequential prefetch instructions")         \
2499                                                                            \
2500  product(intx,  AllocatePrefetchInstr, 0,                                  \
2501          "Prefetch instruction to prefetch ahead of allocation pointer")   \
2502                                                                            \
2503  product(intx,  ReadPrefetchInstr, 0,                                      \
2504          "Prefetch instruction to prefetch ahead")                         \
2505                                                                            \
2506  /* deoptimization */                                                      \
2507  develop(bool, TraceDeoptimization, false,                                 \
2508          "Trace deoptimization")                                           \
2509                                                                            \
2510  develop(bool, DebugDeoptimization, false,                                 \
2511          "Tracing various information while debugging deoptimization")     \
2512                                                                            \
2513  product(intx, SelfDestructTimer, 0,                                       \
2514          "Will cause VM to terminate after a given time (in minutes) "     \
2515          "(0 means off)")                                                  \
2516                                                                            \
2517  product(intx, MaxJavaStackTraceDepth, 1024,                               \
2518          "Max. no. of lines in the stack trace for Java exceptions "       \
2519          "(0 means all)")                                                  \
2520                                                                            \
2521  develop(intx, GuaranteedSafepointInterval, 1000,                          \
2522          "Guarantee a safepoint (at least) every so many milliseconds "    \
2523          "(0 means none)")                                                 \
2524                                                                            \
2525  product(intx, SafepointTimeoutDelay, 10000,                               \
2526          "Delay in milliseconds for option SafepointTimeout")              \
2527                                                                            \
2528  product(intx, NmethodSweepFraction, 4,                                    \
2529          "Number of invocations of sweeper to cover all nmethods")         \
2530                                                                            \
2531  notproduct(intx, MemProfilingInterval, 500,                               \
2532          "Time between each invocation of the MemProfiler")                \
2533                                                                            \
2534  develop(intx, MallocCatchPtr, -1,                                         \
2535          "Hit breakpoint when mallocing/freeing this pointer")             \
2536                                                                            \
2537  notproduct(intx, AssertRepeat, 1,                                         \
2538          "number of times to evaluate expression in assert "               \
2539          "(to estimate overhead); only works with -DUSE_REPEATED_ASSERTS") \
2540                                                                            \
2541  notproduct(ccstrlist, SuppressErrorAt, "",                                \
2542          "List of assertions (file:line) to muzzle")                       \
2543                                                                            \
2544  notproduct(uintx, HandleAllocationLimit, 1024,                            \
2545          "Threshold for HandleMark allocation when +TraceHandleAllocation "\
2546          "is used")                                                        \
2547                                                                            \
2548  develop(uintx, TotalHandleAllocationLimit, 1024,                          \
2549          "Threshold for total handle allocation when "                     \
2550          "+TraceHandleAllocation is used")                                 \
2551                                                                            \
2552  develop(intx, StackPrintLimit, 100,                                       \
2553          "number of stack frames to print in VM-level stack dump")         \
2554                                                                            \
2555  notproduct(intx, MaxElementPrintSize, 256,                                \
2556          "maximum number of elements to print")                            \
2557                                                                            \
2558  notproduct(intx, MaxSubklassPrintSize, 4,                                 \
2559          "maximum number of subklasses to print when printing klass")      \
2560                                                                            \
2561  develop(intx, MaxInlineLevel, 9,                                          \
2562          "maximum number of nested calls that are inlined")                \
2563                                                                            \
2564  develop(intx, MaxRecursiveInlineLevel, 1,                                 \
2565          "maximum number of nested recursive calls that are inlined")      \
2566                                                                            \
2567  product(intx, InlineSmallCode, 1000,                                      \
2568          "Only inline already compiled methods if their code size is "     \
2569          "less than this")                                                 \
2570                                                                            \
2571  product(intx, MaxInlineSize, 35,                                          \
2572          "maximum bytecode size of a method to be inlined")                \
2573                                                                            \
2574  product_pd(intx, FreqInlineSize,                                          \
2575          "maximum bytecode size of a frequent method to be inlined")       \
2576                                                                            \
2577  develop(intx, MaxTrivialSize, 6,                                          \
2578          "maximum bytecode size of a trivial method to be inlined")        \
2579                                                                            \
2580  develop(intx, MinInliningThreshold, 250,                                  \
2581          "min. invocation count a method needs to have to be inlined")     \
2582                                                                            \
2583  develop(intx, AlignEntryCode, 4,                                          \
2584          "aligns entry code to specified value (in bytes)")                \
2585                                                                            \
2586  develop(intx, MethodHistogramCutoff, 100,                                 \
2587          "cutoff value for method invoc. histogram (+CountCalls)")         \
2588                                                                            \
2589  develop(intx, ProfilerNumberOfInterpretedMethods, 25,                     \
2590          "# of interpreted methods to show in profile")                    \
2591                                                                            \
2592  develop(intx, ProfilerNumberOfCompiledMethods, 25,                        \
2593          "# of compiled methods to show in profile")                       \
2594                                                                            \
2595  develop(intx, ProfilerNumberOfStubMethods, 25,                            \
2596          "# of stub methods to show in profile")                           \
2597                                                                            \
2598  develop(intx, ProfilerNumberOfRuntimeStubNodes, 25,                       \
2599          "# of runtime stub nodes to show in profile")                     \
2600                                                                            \
2601  product(intx, ProfileIntervalsTicks, 100,                                 \
2602          "# of ticks between printing of interval profile "                \
2603          "(+ProfileIntervals)")                                            \
2604                                                                            \
2605  notproduct(intx, ScavengeALotInterval,     1,                             \
2606          "Interval between which scavenge will occur with +ScavengeALot")  \
2607                                                                            \
2608  notproduct(intx, FullGCALotInterval,     1,                               \
2609          "Interval between which full gc will occur with +FullGCALot")     \
2610                                                                            \
2611  notproduct(intx, FullGCALotStart,     0,                                  \
2612          "For which invocation to start FullGCAlot")                       \
2613                                                                            \
2614  notproduct(intx, FullGCALotDummies,  32*K,                                \
2615          "Dummy object allocated with +FullGCALot, forcing all objects "   \
2616          "to move")                                                        \
2617                                                                            \
2618  develop(intx, DontYieldALotInterval,    10,                               \
2619          "Interval between which yields will be dropped (milliseconds)")   \
2620                                                                            \
2621  develop(intx, MinSleepInterval,     1,                                    \
2622          "Minimum sleep() interval (milliseconds) when "                   \
2623          "ConvertSleepToYield is off (used for SOLARIS)")                  \
2624                                                                            \
2625  product(intx, EventLogLength,  2000,                                      \
2626          "maximum nof events in event log")                                \
2627                                                                            \
2628  develop(intx, ProfilerPCTickThreshold,    15,                             \
2629          "Number of ticks in a PC buckets to be a hotspot")                \
2630                                                                            \
2631  notproduct(intx, DeoptimizeALotInterval,     5,                           \
2632          "Number of exits until DeoptimizeALot kicks in")                  \
2633                                                                            \
2634  notproduct(intx, ZombieALotInterval,     5,                               \
2635          "Number of exits until ZombieALot kicks in")                      \
2636                                                                            \
2637  develop(bool, StressNonEntrant, false,                                    \
2638          "Mark nmethods non-entrant at registration")                      \
2639                                                                            \
2640  diagnostic(intx, MallocVerifyInterval,     0,                             \
2641          "if non-zero, verify C heap after every N calls to "              \
2642          "malloc/realloc/free")                                            \
2643                                                                            \
2644  diagnostic(intx, MallocVerifyStart,     0,                                \
2645          "if non-zero, start verifying C heap after Nth call to "          \
2646          "malloc/realloc/free")                                            \
2647                                                                            \
2648  product(intx, TypeProfileWidth,      2,                                   \
2649          "number of receiver types to record in call/cast profile")        \
2650                                                                            \
2651  develop(intx, BciProfileWidth,      2,                                    \
2652          "number of return bci's to record in ret profile")                \
2653                                                                            \
2654  product(intx, PerMethodRecompilationCutoff, 400,                          \
2655          "After recompiling N times, stay in the interpreter (-1=>'Inf')") \
2656                                                                            \
2657  product(intx, PerBytecodeRecompilationCutoff, 100,                        \
2658          "Per-BCI limit on repeated recompilation (-1=>'Inf')")            \
2659                                                                            \
2660  product(intx, PerMethodTrapLimit,  100,                                   \
2661          "Limit on traps (of one kind) in a method (includes inlines)")    \
2662                                                                            \
2663  product(intx, PerBytecodeTrapLimit,  4,                                   \
2664          "Limit on traps (of one kind) at a particular BCI")               \
2665                                                                            \
2666  develop(intx, FreqCountInvocations,  1,                                   \
2667          "Scaling factor for branch frequencies (deprecated)")             \
2668                                                                            \
2669  develop(intx, InlineFrequencyRatio,    20,                                \
2670          "Ratio of call site execution to caller method invocation")       \
2671                                                                            \
2672  develop_pd(intx, InlineFrequencyCount,                                    \
2673          "Count of call site execution necessary to trigger frequent "     \
2674          "inlining")                                                       \
2675                                                                            \
2676  develop(intx, InlineThrowCount,    50,                                    \
2677          "Force inlining of interpreted methods that throw this often")    \
2678                                                                            \
2679  develop(intx, InlineThrowMaxSize,   200,                                  \
2680          "Force inlining of throwing methods smaller than this")           \
2681                                                                            \
2682  product(intx, AliasLevel,     3,                                          \
2683          "0 for no aliasing, 1 for oop/field/static/array split, "         \
2684          "2 for class split, 3 for unique instances")                      \
2685                                                                            \
2686  develop(bool, VerifyAliases, false,                                       \
2687          "perform extra checks on the results of alias analysis")          \
2688                                                                            \
2689  develop(intx, ProfilerNodeSize,  1024,                                    \
2690          "Size in K to allocate for the Profile Nodes of each thread")     \
2691                                                                            \
2692  develop(intx, V8AtomicOperationUnderLockSpinCount,    50,                 \
2693          "Number of times to spin wait on a v8 atomic operation lock")     \
2694                                                                            \
2695  product(intx, ReadSpinIterations,   100,                                  \
2696          "Number of read attempts before a yield (spin inner loop)")       \
2697                                                                            \
2698  product_pd(intx, PreInflateSpin,                                          \
2699          "Number of times to spin wait before inflation")                  \
2700                                                                            \
2701  product(intx, PreBlockSpin,    10,                                        \
2702          "Number of times to spin in an inflated lock before going to "    \
2703          "an OS lock")                                                     \
2704                                                                            \
2705  /* gc parameters */                                                       \
2706  product(uintx, MaxHeapSize, ScaleForWordSize(64*M),                       \
2707          "Default maximum size for object heap (in bytes)")                \
2708                                                                            \
2709  product_pd(uintx, NewSize,                                                \
2710          "Default size of new generation (in bytes)")                      \
2711                                                                            \
2712  product(uintx, MaxNewSize, max_uintx,                                     \
2713          "Maximum size of new generation (in bytes)")                      \
2714                                                                            \
2715  product(uintx, PretenureSizeThreshold, 0,                                 \
2716          "Max size in bytes of objects allocated in DefNew generation")    \
2717                                                                            \
2718  product_pd(uintx, TLABSize,                                               \
2719          "Default (or starting) size of TLAB (in bytes)")                  \
2720                                                                            \
2721  product(uintx, MinTLABSize, 2*K,                                          \
2722          "Minimum allowed TLAB size (in bytes)")                           \
2723                                                                            \
2724  product(uintx, TLABAllocationWeight, 35,                                  \
2725          "Allocation averaging weight")                                    \
2726                                                                            \
2727  product(uintx, TLABWasteTargetPercent, 1,                                 \
2728          "Percentage of Eden that can be wasted")                          \
2729                                                                            \
2730  product(uintx, TLABRefillWasteFraction,    64,                            \
2731          "Max TLAB waste at a refill (internal fragmentation)")            \
2732                                                                            \
2733  product(uintx, TLABWasteIncrement,    4,                                  \
2734          "Increment allowed waste at slow allocation")                     \
2735                                                                            \
2736  product_pd(intx, SurvivorRatio,                                           \
2737          "Ratio of eden/survivor space size")                              \
2738                                                                            \
2739  product_pd(intx, NewRatio,                                                \
2740          "Ratio of new/old generation sizes")                              \
2741                                                                            \
2742  product(uintx, MaxLiveObjectEvacuationRatio, 100,                         \
2743          "Max percent of eden objects that will be live at scavenge")      \
2744                                                                            \
2745  product_pd(uintx, NewSizeThreadIncrease,                                  \
2746          "Additional size added to desired new generation size per "       \
2747          "non-daemon thread (in bytes)")                                   \
2748                                                                            \
2749  product(uintx, OldSize, ScaleForWordSize(4096*K),                         \
2750          "Default size of tenured generation (in bytes)")                  \
2751                                                                            \
2752  product_pd(uintx, PermSize,                                               \
2753          "Default size of permanent generation (in bytes)")                \
2754                                                                            \
2755  product_pd(uintx, MaxPermSize,                                            \
2756          "Maximum size of permanent generation (in bytes)")                \
2757                                                                            \
2758  product(uintx, MinHeapFreeRatio,    40,                                   \
2759          "Min percentage of heap free after GC to avoid expansion")        \
2760                                                                            \
2761  product(uintx, MaxHeapFreeRatio,    70,                                   \
2762          "Max percentage of heap free after GC to avoid shrinking")        \
2763                                                                            \
2764  product(intx, SoftRefLRUPolicyMSPerMB, 1000,                              \
2765          "Number of milliseconds per MB of free space in the heap")        \
2766                                                                            \
2767  product(uintx, MinHeapDeltaBytes, ScaleForWordSize(128*K),                \
2768          "Min change in heap space due to GC (in bytes)")                  \
2769                                                                            \
2770  product(uintx, MinPermHeapExpansion, ScaleForWordSize(256*K),             \
2771          "Min expansion of permanent heap (in bytes)")                     \
2772                                                                            \
2773  product(uintx, MaxPermHeapExpansion, ScaleForWordSize(4*M),               \
2774          "Max expansion of permanent heap without full GC (in bytes)")     \
2775                                                                            \
2776  product(intx, QueuedAllocationWarningCount, 0,                            \
2777          "Number of times an allocation that queues behind a GC "          \
2778          "will retry before printing a warning")                           \
2779                                                                            \
2780  diagnostic(uintx, VerifyGCStartAt,   0,                                   \
2781          "GC invoke count where +VerifyBefore/AfterGC kicks in")           \
2782                                                                            \
2783  diagnostic(intx, VerifyGCLevel,     0,                                    \
2784          "Generation level at which to start +VerifyBefore/AfterGC")       \
2785                                                                            \
2786  develop(uintx, ExitAfterGCNum,   0,                                       \
2787          "If non-zero, exit after this GC.")                               \
2788                                                                            \
2789  product(intx, MaxTenuringThreshold,    15,                                \
2790          "Maximum value for tenuring threshold")                           \
2791                                                                            \
2792  product(intx, InitialTenuringThreshold,     7,                            \
2793          "Initial value for tenuring threshold")                           \
2794                                                                            \
2795  product(intx, TargetSurvivorRatio,    50,                                 \
2796          "Desired percentage of survivor space used after scavenge")       \
2797                                                                            \
2798  product(uintx, MarkSweepDeadRatio,     5,                                 \
2799          "Percentage (0-100) of the old gen allowed as dead wood."         \
2800          "Serial mark sweep treats this as both the min and max value."    \
2801          "CMS uses this value only if it falls back to mark sweep."        \
2802          "Par compact uses a variable scale based on the density of the"   \
2803          "generation and treats this as the max value when the heap is"    \
2804          "either completely full or completely empty.  Par compact also"   \
2805          "has a smaller default value; see arguments.cpp.")                \
2806                                                                            \
2807  product(uintx, PermMarkSweepDeadRatio,    20,                             \
2808          "Percentage (0-100) of the perm gen allowed as dead wood."        \
2809          "See MarkSweepDeadRatio for collector-specific comments.")        \
2810                                                                            \
2811  product(intx, MarkSweepAlwaysCompactCount,     4,                         \
2812          "How often should we fully compact the heap (ignoring the dead "  \
2813          "space parameters)")                                              \
2814                                                                            \
2815  product(intx, PrintCMSStatistics, 0,                                      \
2816          "Statistics for CMS")                                             \
2817                                                                            \
2818  product(bool, PrintCMSInitiationStatistics, false,                        \
2819          "Statistics for initiating a CMS collection")                     \
2820                                                                            \
2821  product(intx, PrintFLSStatistics, 0,                                      \
2822          "Statistics for CMS' FreeListSpace")                              \
2823                                                                            \
2824  product(intx, PrintFLSCensus, 0,                                          \
2825          "Census for CMS' FreeListSpace")                                  \
2826                                                                            \
2827  develop(uintx, GCExpandToAllocateDelayMillis, 0,                          \
2828          "Delay in ms between expansion and allocation")                   \
2829                                                                            \
2830  product(intx, DeferThrSuspendLoopCount,     4000,                         \
2831          "(Unstable) Number of times to iterate in safepoint loop "        \
2832          " before blocking VM threads ")                                   \
2833                                                                            \
2834  product(intx, DeferPollingPageLoopCount,     -1,                          \
2835          "(Unsafe,Unstable) Number of iterations in safepoint loop "       \
2836          "before changing safepoint polling page to RO ")                  \
2837                                                                            \
2838  product(intx, SafepointSpinBeforeYield, 2000,  "(Unstable)")              \
2839                                                                            \
2840  product(bool, UseDepthFirstScavengeOrder, true,                           \
2841          "true: the scavenge order will be depth-first, "                  \
2842          "false: the scavenge order will be breadth-first")                \
2843                                                                            \
2844  product(bool, PSChunkLargeArrays, true,                                   \
2845          "true: process large arrays in chunks")                           \
2846                                                                            \
2847  product(uintx, GCDrainStackTargetSize, 64,                                \
2848          "how many entries we'll try to leave on the stack during "        \
2849          "parallel GC")                                                    \
2850                                                                            \
2851  product(intx, DCQBarrierQueueBufferSize, 256,                             \
2852          "Number of elements in a dirty card queue buffer")                \
2853                                                                            \
2854  product(intx, DCQBarrierProcessCompletedThreshold, 5,                     \
2855          "Number of completed dirty card buffers to trigger processing.")  \
2856                                                                            \
2857  /* stack parameters */                                                    \
2858  product_pd(intx, StackYellowPages,                                        \
2859          "Number of yellow zone (recoverable overflows) pages")            \
2860                                                                            \
2861  product_pd(intx, StackRedPages,                                           \
2862          "Number of red zone (unrecoverable overflows) pages")             \
2863                                                                            \
2864  product_pd(intx, StackShadowPages,                                        \
2865          "Number of shadow zone (for overflow checking) pages"             \
2866          " this should exceed the depth of the VM and native call stack")  \
2867                                                                            \
2868  product_pd(intx, ThreadStackSize,                                         \
2869          "Thread Stack Size (in Kbytes)")                                  \
2870                                                                            \
2871  product_pd(intx, VMThreadStackSize,                                       \
2872          "Non-Java Thread Stack Size (in Kbytes)")                         \
2873                                                                            \
2874  product_pd(intx, CompilerThreadStackSize,                                 \
2875          "Compiler Thread Stack Size (in Kbytes)")                         \
2876                                                                            \
2877  develop_pd(uintx, JVMInvokeMethodSlack,                                   \
2878          "Stack space (bytes) required for JVM_InvokeMethod to complete")  \
2879                                                                            \
2880  product(uintx, ThreadSafetyMargin, 50*M,                                  \
2881          "Thread safety margin is used on fixed-stack LinuxThreads (on "   \
2882          "Linux/x86 only) to prevent heap-stack collision. Set to 0 to "   \
2883          "disable this feature")                                           \
2884                                                                            \
2885  /* code cache parameters */                                               \
2886  develop(uintx, CodeCacheSegmentSize, 64,                                  \
2887          "Code cache segment size (in bytes) - smallest unit of "          \
2888          "allocation")                                                     \
2889                                                                            \
2890  develop_pd(intx, CodeEntryAlignment,                                      \
2891          "Code entry alignment for generated code (in bytes)")             \
2892                                                                            \
2893  product_pd(uintx, InitialCodeCacheSize,                                   \
2894          "Initial code cache size (in bytes)")                             \
2895                                                                            \
2896  product_pd(uintx, ReservedCodeCacheSize,                                  \
2897          "Reserved code cache size (in bytes) - maximum code cache size")  \
2898                                                                            \
2899  product(uintx, CodeCacheMinimumFreeSpace, 500*K,                          \
2900          "When less than X space left, we stop compiling.")                \
2901                                                                            \
2902  product_pd(uintx, CodeCacheExpansionSize,                                 \
2903          "Code cache expansion size (in bytes)")                           \
2904                                                                            \
2905  develop_pd(uintx, CodeCacheMinBlockLength,                                \
2906          "Minimum number of segments in a code cache block.")              \
2907                                                                            \
2908  notproduct(bool, ExitOnFullCodeCache, false,                              \
2909          "Exit the VM if we fill the code cache.")                         \
2910                                                                            \
2911  /* interpreter debugging */                                               \
2912  develop(intx, BinarySwitchThreshold, 5,                                   \
2913          "Minimal number of lookupswitch entries for rewriting to binary " \
2914          "switch")                                                         \
2915                                                                            \
2916  develop(intx, StopInterpreterAt, 0,                                       \
2917          "Stops interpreter execution at specified bytecode number")       \
2918                                                                            \
2919  develop(intx, TraceBytecodesAt, 0,                                        \
2920          "Traces bytecodes starting with specified bytecode number")       \
2921                                                                            \
2922  /* compiler interface */                                                  \
2923  develop(intx, CIStart, 0,                                                 \
2924          "the id of the first compilation to permit")                      \
2925                                                                            \
2926  develop(intx, CIStop,    -1,                                              \
2927          "the id of the last compilation to permit")                       \
2928                                                                            \
2929  develop(intx, CIStartOSR,     0,                                          \
2930          "the id of the first osr compilation to permit "                  \
2931          "(CICountOSR must be on)")                                        \
2932                                                                            \
2933  develop(intx, CIStopOSR,    -1,                                           \
2934          "the id of the last osr compilation to permit "                   \
2935          "(CICountOSR must be on)")                                        \
2936                                                                            \
2937  develop(intx, CIBreakAtOSR,    -1,                                        \
2938          "id of osr compilation to break at")                              \
2939                                                                            \
2940  develop(intx, CIBreakAt,    -1,                                           \
2941          "id of compilation to break at")                                  \
2942                                                                            \
2943  product(ccstrlist, CompileOnly, "",                                       \
2944          "List of methods (pkg/class.name) to restrict compilation to")    \
2945                                                                            \
2946  product(ccstr, CompileCommandFile, NULL,                                  \
2947          "Read compiler commands from this file [.hotspot_compiler]")      \
2948                                                                            \
2949  product(ccstrlist, CompileCommand, "",                                    \
2950          "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \
2951                                                                            \
2952  product(bool, CICompilerCountPerCPU, false,                               \
2953          "1 compiler thread for log(N CPUs)")                              \
2954                                                                            \
2955  develop(intx, CIFireOOMAt,    -1,                                         \
2956          "Fire OutOfMemoryErrors throughout CI for testing the compiler "  \
2957          "(non-negative value throws OOM after this many CI accesses "     \
2958          "in each compile)")                                               \
2959                                                                            \
2960  develop(intx, CIFireOOMAtDelay, -1,                                       \
2961          "Wait for this many CI accesses to occur in all compiles before " \
2962          "beginning to throw OutOfMemoryErrors in each compile")           \
2963                                                                            \
2964  /* Priorities */                                                          \
2965  product_pd(bool, UseThreadPriorities,  "Use native thread priorities")    \
2966                                                                            \
2967  product(intx, ThreadPriorityPolicy, 0,                                    \
2968          "0 : Normal.                                                     "\
2969          "    VM chooses priorities that are appropriate for normal       "\
2970          "    applications. On Solaris NORM_PRIORITY and above are mapped "\
2971          "    to normal native priority. Java priorities below NORM_PRIORITY"\
2972          "    map to lower native priority values. On Windows applications"\
2973          "    are allowed to use higher native priorities. However, with  "\
2974          "    ThreadPriorityPolicy=0, VM will not use the highest possible"\
2975          "    native priority, THREAD_PRIORITY_TIME_CRITICAL, as it may   "\
2976          "    interfere with system threads. On Linux thread priorities   "\
2977          "    are ignored because the OS does not support static priority "\
2978          "    in SCHED_OTHER scheduling class which is the only choice for"\
2979          "    non-root, non-realtime applications.                        "\
2980          "1 : Aggressive.                                                 "\
2981          "    Java thread priorities map over to the entire range of      "\
2982          "    native thread priorities. Higher Java thread priorities map "\
2983          "    to higher native thread priorities. This policy should be   "\
2984          "    used with care, as sometimes it can cause performance       "\
2985          "    degradation in the application and/or the entire system. On "\
2986          "    Linux this policy requires root privilege.")                 \
2987                                                                            \
2988  product(bool, ThreadPriorityVerbose, false,                               \
2989          "print priority changes")                                         \
2990                                                                            \
2991  product(intx, DefaultThreadPriority, -1,                                  \
2992          "what native priority threads run at if not specified elsewhere (-1 means no change)") \
2993                                                                            \
2994  product(intx, CompilerThreadPriority, -1,                                 \
2995          "what priority should compiler threads run at (-1 means no change)") \
2996                                                                            \
2997  product(intx, VMThreadPriority, -1,                                       \
2998          "what priority should VM threads run at (-1 means no change)")    \
2999                                                                            \
3000  product(bool, CompilerThreadHintNoPreempt, true,                          \
3001          "(Solaris only) Give compiler threads an extra quanta")           \
3002                                                                            \
3003  product(bool, VMThreadHintNoPreempt, false,                               \
3004          "(Solaris only) Give VM thread an extra quanta")                  \
3005                                                                            \
3006  product(intx, JavaPriority1_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3007  product(intx, JavaPriority2_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3008  product(intx, JavaPriority3_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3009  product(intx, JavaPriority4_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3010  product(intx, JavaPriority5_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3011  product(intx, JavaPriority6_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3012  product(intx, JavaPriority7_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3013  product(intx, JavaPriority8_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3014  product(intx, JavaPriority9_To_OSPriority, -1, "Map Java priorities to OS priorities") \
3015  product(intx, JavaPriority10_To_OSPriority,-1, "Map Java priorities to OS priorities") \
3016                                                                            \
3017  /* compiler debugging */                                                  \
3018  notproduct(intx, CompileTheWorldStartAt,     1,                           \
3019          "First class to consider when using +CompileTheWorld")            \
3020                                                                            \
3021  notproduct(intx, CompileTheWorldStopAt, max_jint,                         \
3022          "Last class to consider when using +CompileTheWorld")             \
3023                                                                            \
3024  develop(intx, NewCodeParameter,      0,                                   \
3025          "Testing Only: Create a dedicated integer parameter before "      \
3026          "putback")                                                        \
3027                                                                            \
3028  /* new oopmap storage allocation */                                       \
3029  develop(intx, MinOopMapAllocation,     8,                                 \
3030          "Minimum number of OopMap entries in an OopMapSet")               \
3031                                                                            \
3032  /* Background Compilation */                                              \
3033  develop(intx, LongCompileThreshold,     50,                               \
3034          "Used with +TraceLongCompiles")                                   \
3035                                                                            \
3036  product(intx, StarvationMonitorInterval,    200,                          \
3037          "Pause between each check in ms")                                 \
3038                                                                            \
3039  /* recompilation */                                                       \
3040  product_pd(intx, CompileThreshold,                                        \
3041          "number of interpreted method invocations before (re-)compiling") \
3042                                                                            \
3043  product_pd(intx, BackEdgeThreshold,                                       \
3044          "Interpreter Back edge threshold at which an OSR compilation is invoked")\
3045                                                                            \
3046  product(intx, Tier1BytecodeLimit,      10,                                \
3047          "Must have at least this many bytecodes before tier1"             \
3048          "invocation counters are used")                                   \
3049                                                                            \
3050  product_pd(intx, Tier2CompileThreshold,                                   \
3051          "threshold at which a tier 2 compilation is invoked")             \
3052                                                                            \
3053  product_pd(intx, Tier2BackEdgeThreshold,                                  \
3054          "Back edge threshold at which a tier 2 compilation is invoked")   \
3055                                                                            \
3056  product_pd(intx, Tier3CompileThreshold,                                   \
3057          "threshold at which a tier 3 compilation is invoked")             \
3058                                                                            \
3059  product_pd(intx, Tier3BackEdgeThreshold,                                  \
3060          "Back edge threshold at which a tier 3 compilation is invoked")   \
3061                                                                            \
3062  product_pd(intx, Tier4CompileThreshold,                                   \
3063          "threshold at which a tier 4 compilation is invoked")             \
3064                                                                            \
3065  product_pd(intx, Tier4BackEdgeThreshold,                                  \
3066          "Back edge threshold at which a tier 4 compilation is invoked")   \
3067                                                                            \
3068  product_pd(bool, TieredCompilation,                                       \
3069          "Enable two-tier compilation")                                    \
3070                                                                            \
3071  product(bool, StressTieredRuntime, false,                                 \
3072          "Alternate client and server compiler on compile requests")       \
3073                                                                            \
3074  product_pd(intx, OnStackReplacePercentage,                                \
3075          "NON_TIERED number of method invocations/branches (expressed as %"\
3076          "of CompileThreshold) before (re-)compiling OSR code")            \
3077                                                                            \
3078  product(intx, InterpreterProfilePercentage, 33,                           \
3079          "NON_TIERED number of method invocations/branches (expressed as %"\
3080          "of CompileThreshold) before profiling in the interpreter")       \
3081                                                                            \
3082  develop(intx, MaxRecompilationSearchLength,    10,                        \
3083          "max. # frames to inspect searching for recompilee")              \
3084                                                                            \
3085  develop(intx, MaxInterpretedSearchLength,     3,                          \
3086          "max. # interp. frames to skip when searching for recompilee")    \
3087                                                                            \
3088  develop(intx, DesiredMethodLimit,  8000,                                  \
3089          "desired max. method size (in bytecodes) after inlining")         \
3090                                                                            \
3091  develop(intx, HugeMethodLimit,  8000,                                     \
3092          "don't compile methods larger than this if "                      \
3093          "+DontCompileHugeMethods")                                        \
3094                                                                            \
3095  /* New JDK 1.4 reflection implementation */                               \
3096                                                                            \
3097  develop(bool, UseNewReflection, true,                                     \
3098          "Temporary flag for transition to reflection based on dynamic "   \
3099          "bytecode generation in 1.4; can no longer be turned off in 1.4 " \
3100          "JDK, and is unneeded in 1.3 JDK, but marks most places VM "      \
3101          "changes were needed")                                            \
3102                                                                            \
3103  develop(bool, VerifyReflectionBytecodes, false,                           \
3104          "Force verification of 1.4 reflection bytecodes. Does not work "  \
3105          "in situations like that described in 4486457 or for "            \
3106          "constructors generated for serialization, so can not be enabled "\
3107          "in product.")                                                    \
3108                                                                            \
3109  product(bool, ReflectionWrapResolutionErrors, true,                       \
3110          "Temporary flag for transition to AbstractMethodError wrapped "   \
3111          "in InvocationTargetException. See 6531596")                      \
3112                                                                            \
3113                                                                            \
3114  develop(intx, FastSuperclassLimit, 8,                                     \
3115          "Depth of hardwired instanceof accelerator array")                \
3116                                                                            \
3117  /* Properties for Java libraries  */                                      \
3118                                                                            \
3119  product(intx, MaxDirectMemorySize, -1,                                    \
3120          "Maximum total size of NIO direct-buffer allocations")            \
3121                                                                            \
3122  /* temporary developer defined flags  */                                  \
3123                                                                            \
3124  diagnostic(bool, UseNewCode, false,                                       \
3125          "Testing Only: Use the new version while testing")                \
3126                                                                            \
3127  diagnostic(bool, UseNewCode2, false,                                      \
3128          "Testing Only: Use the new version while testing")                \
3129                                                                            \
3130  diagnostic(bool, UseNewCode3, false,                                      \
3131          "Testing Only: Use the new version while testing")                \
3132                                                                            \
3133  /* flags for performance data collection */                               \
3134                                                                            \
3135  product(bool, UsePerfData, true,                                          \
3136          "Flag to disable jvmstat instrumentation for performance testing" \
3137          "and problem isolation purposes.")                                \
3138                                                                            \
3139  product(bool, PerfDataSaveToFile, false,                                  \
3140          "Save PerfData memory to hsperfdata_<pid> file on exit")          \
3141                                                                            \
3142  product(ccstr, PerfDataSaveFile, NULL,                                    \
3143          "Save PerfData memory to the specified absolute pathname,"        \
3144           "%p in the file name if present will be replaced by pid")        \
3145                                                                            \
3146  product(intx, PerfDataSamplingInterval, 50 /*ms*/,                        \
3147          "Data sampling interval in milliseconds")                         \
3148                                                                            \
3149  develop(bool, PerfTraceDataCreation, false,                               \
3150          "Trace creation of Performance Data Entries")                     \
3151                                                                            \
3152  develop(bool, PerfTraceMemOps, false,                                     \
3153          "Trace PerfMemory create/attach/detach calls")                    \
3154                                                                            \
3155  product(bool, PerfDisableSharedMem, false,                                \
3156          "Store performance data in standard memory")                      \
3157                                                                            \
3158  product(intx, PerfDataMemorySize, 32*K,                                   \
3159          "Size of performance data memory region. Will be rounded "        \
3160          "up to a multiple of the native os page size.")                   \
3161                                                                            \
3162  product(intx, PerfMaxStringConstLength, 1024,                             \
3163          "Maximum PerfStringConstant string length before truncation")     \
3164                                                                            \
3165  product(bool, PerfAllowAtExitRegistration, false,                         \
3166          "Allow registration of atexit() methods")                         \
3167                                                                            \
3168  product(bool, PerfBypassFileSystemCheck, false,                           \
3169          "Bypass Win32 file system criteria checks (Windows Only)")        \
3170                                                                            \
3171  product(intx, UnguardOnExecutionViolation, 0,                             \
3172          "Unguard page and retry on no-execute fault (Win32 only)"         \
3173          "0=off, 1=conservative, 2=aggressive")                            \
3174                                                                            \
3175  /* Serviceability Support */                                              \
3176                                                                            \
3177  product(bool, ManagementServer, false,                                    \
3178          "Create JMX Management Server")                                   \
3179                                                                            \
3180  product(bool, DisableAttachMechanism, false,                              \
3181         "Disable mechanism that allows tools to attach to this VM")        \
3182                                                                            \
3183  product(bool, StartAttachListener, false,                                 \
3184          "Always start Attach Listener at VM startup")                     \
3185                                                                            \
3186  manageable(bool, PrintConcurrentLocks, false,                             \
3187          "Print java.util.concurrent locks in thread dump")                \
3188                                                                            \
3189  /* Shared spaces */                                                       \
3190                                                                            \
3191  product(bool, UseSharedSpaces, true,                                      \
3192          "Use shared spaces in the permanent generation")                  \
3193                                                                            \
3194  product(bool, RequireSharedSpaces, false,                                 \
3195          "Require shared spaces in the permanent generation")              \
3196                                                                            \
3197  product(bool, ForceSharedSpaces, false,                                   \
3198          "Require shared spaces in the permanent generation")              \
3199                                                                            \
3200  product(bool, DumpSharedSpaces, false,                                    \
3201           "Special mode: JVM reads a class list, loads classes, builds "   \
3202            "shared spaces, and dumps the shared spaces to a file to be "   \
3203            "used in future JVM runs.")                                     \
3204                                                                            \
3205  product(bool, PrintSharedSpaces, false,                                   \
3206          "Print usage of shared spaces")                                   \
3207                                                                            \
3208  product(uintx, SharedDummyBlockSize, 512*M,                               \
3209          "Size of dummy block used to shift heap addresses (in bytes)")    \
3210                                                                            \
3211  product(uintx, SharedReadWriteSize,  12*M,                                \
3212          "Size of read-write space in permanent generation (in bytes)")    \
3213                                                                            \
3214  product(uintx, SharedReadOnlySize,    8*M,                                \
3215          "Size of read-only space in permanent generation (in bytes)")     \
3216                                                                            \
3217  product(uintx, SharedMiscDataSize,    4*M,                                \
3218          "Size of the shared data area adjacent to the heap (in bytes)")   \
3219                                                                            \
3220  product(uintx, SharedMiscCodeSize,    4*M,                                \
3221          "Size of the shared code area adjacent to the heap (in bytes)")   \
3222                                                                            \
3223  diagnostic(bool, SharedOptimizeColdStart, true,                           \
3224          "At dump time, order shared objects to achieve better "           \
3225          "cold startup time.")                                             \
3226                                                                            \
3227  develop(intx, SharedOptimizeColdStartPolicy, 2,                           \
3228          "Reordering policy for SharedOptimizeColdStart "                  \
3229          "0=favor classload-time locality, 1=balanced, "                   \
3230          "2=favor runtime locality")                                       \
3231                                                                            \
3232  diagnostic(bool, SharedSkipVerify, false,                                 \
3233          "Skip assert() and verify() which page-in unwanted shared "       \
3234          "objects. ")                                                      \
3235                                                                            \
3236  product(bool, AnonymousClasses, false,                                    \
3237          "support sun.misc.Unsafe.defineAnonymousClass")                   \
3238                                                                            \
3239  product(bool, TaggedStackInterpreter, false,                              \
3240          "Insert tags in interpreter execution stack for oopmap generaion")\
3241                                                                            \
3242  diagnostic(bool, PauseAtStartup,      false,                              \
3243          "Causes the VM to pause at startup time and wait for the pause "  \
3244          "file to be removed (default: ./vm.paused.<pid>)")                \
3245                                                                            \
3246  diagnostic(ccstr, PauseAtStartupFile, NULL,                               \
3247          "The file to create and for whose removal to await when pausing " \
3248          "at startup. (default: ./vm.paused.<pid>)")                       \
3249                                                                            \
3250  product(bool, ExtendedDTraceProbes,    false,                             \
3251          "Enable performance-impacting dtrace probes")                     \
3252                                                                            \
3253  product(bool, DTraceMethodProbes, false,                                  \
3254          "Enable dtrace probes for method-entry and method-exit")          \
3255                                                                            \
3256  product(bool, DTraceAllocProbes, false,                                   \
3257          "Enable dtrace probes for object allocation")                     \
3258                                                                            \
3259  product(bool, DTraceMonitorProbes, false,                                 \
3260          "Enable dtrace probes for monitor events")                        \
3261                                                                            \
3262  product(bool, RelaxAccessControlCheck, false,                             \
3263          "Relax the access control checks in the verifier")                \
3264                                                                            \
3265  diagnostic(bool, PrintDTraceDOF, false,                                   \
3266             "Print the DTrace DOF passed to the system for JSDT probes")   \
3267                                                                            \
3268  product(bool, UseVMInterruptibleIO, false,                                \
3269          "(Unstable, Solaris-specific) Thread interrupt before or with "   \
3270          "EINTR for I/O operations results in OS_INTRPT. The default value"\
3271          " of this flag is true for JDK 6 and earliers")
3272
3273
3274/*
3275 *  Macros for factoring of globals
3276 */
3277
3278// Interface macros
3279#define DECLARE_PRODUCT_FLAG(type, name, value, doc)    extern "C" type name;
3280#define DECLARE_PD_PRODUCT_FLAG(type, name, doc)        extern "C" type name;
3281#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name;
3282#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name;
3283#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name;
3284#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name;
3285#ifdef PRODUCT
3286#define DECLARE_DEVELOPER_FLAG(type, name, value, doc)  const type name = value;
3287#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)      const type name = pd_##name;
3288#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)
3289#else
3290#define DECLARE_DEVELOPER_FLAG(type, name, value, doc)  extern "C" type name;
3291#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc)      extern "C" type name;
3292#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc)  extern "C" type name;
3293#endif
3294// Special LP64 flags, product only needed for now.
3295#ifdef _LP64
3296#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name;
3297#else
3298#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value;
3299#endif // _LP64
3300
3301// Implementation macros
3302#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc)   type name = value;
3303#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc)       type name = pd_##name;
3304#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value;
3305#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value;
3306#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value;
3307#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value;
3308#ifdef PRODUCT
3309#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) /* flag name is constant */
3310#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)     /* flag name is constant */
3311#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc)
3312#else
3313#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value;
3314#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc)     type name = pd_##name;
3315#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value;
3316#endif
3317#ifdef _LP64
3318#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc)   type name = value;
3319#else
3320#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */
3321#endif // _LP64
3322
3323RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG, DECLARE_LP64_PRODUCT_FLAG)
3324
3325RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)
3326