globals.hpp revision 9368:83c3b8b7e80f
1198629Srrs/* 2198629Srrs * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3198629Srrs * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4198629Srrs * 5198629Srrs * This code is free software; you can redistribute it and/or modify it 6198629Srrs * under the terms of the GNU General Public License version 2 only, as 7198629Srrs * published by the Free Software Foundation. 8198629Srrs * 9198629Srrs * This code is distributed in the hope that it will be useful, but WITHOUT 10198629Srrs * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11198629Srrs * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12198629Srrs * version 2 for more details (a copy is included in the LICENSE file that 13198629Srrs * accompanied this code). 14198629Srrs * 15198629Srrs * You should have received a copy of the GNU General Public License version 16198629Srrs * 2 along with this work; if not, write to the Free Software Foundation, 17198629Srrs * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18198629Srrs * 19198629Srrs * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20198629Srrs * or visit www.oracle.com if you need additional information or have any 21198629Srrs * questions. 22198629Srrs * 23198629Srrs */ 24198629Srrs 25198629Srrs#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26198629Srrs#define SHARE_VM_RUNTIME_GLOBALS_HPP 27198629Srrs 28198629Srrs#include <float.h> 29211994Sjchandra#include "utilities/debug.hpp" 30211994Sjchandra#include <float.h> // for DBL_MAX 31211994Sjchandra 32198629Srrs// use this for flags that are true per default in the tiered build 33212366Sjchandra// but false in non-tiered builds, and vice versa 34198629Srrs#ifdef TIERED 35212366Sjchandra#define trueInTiered true 36212366Sjchandra#define falseInTiered false 37212366Sjchandra#else 38212366Sjchandra#define trueInTiered false 39212366Sjchandra#define falseInTiered true 40212366Sjchandra#endif 41198629Srrs 42213441Sjchandra#ifdef TARGET_ARCH_x86 43198629Srrs# include "globals_x86.hpp" 44212366Sjchandra#endif 45212366Sjchandra#ifdef TARGET_ARCH_sparc 46212366Sjchandra# include "globals_sparc.hpp" 47198629Srrs#endif 48212366Sjchandra#ifdef TARGET_ARCH_zero 49198629Srrs# include "globals_zero.hpp" 50212366Sjchandra#endif 51212366Sjchandra#ifdef TARGET_ARCH_arm 52212366Sjchandra# include "globals_arm.hpp" 53212366Sjchandra#endif 54212366Sjchandra#ifdef TARGET_ARCH_ppc 55212366Sjchandra# include "globals_ppc.hpp" 56212366Sjchandra#endif 57212366Sjchandra#ifdef TARGET_ARCH_aarch64 58212366Sjchandra# include "globals_aarch64.hpp" 59212366Sjchandra#endif 60212366Sjchandra#ifdef TARGET_OS_FAMILY_linux 61198629Srrs# include "globals_linux.hpp" 62198629Srrs#endif 63212366Sjchandra#ifdef TARGET_OS_FAMILY_solaris 64212366Sjchandra# include "globals_solaris.hpp" 65198629Srrs#endif 66212366Sjchandra#ifdef TARGET_OS_FAMILY_windows 67212366Sjchandra# include "globals_windows.hpp" 68212366Sjchandra#endif 69212366Sjchandra#ifdef TARGET_OS_FAMILY_aix 70212366Sjchandra# include "globals_aix.hpp" 71212366Sjchandra#endif 72212366Sjchandra#ifdef TARGET_OS_FAMILY_bsd 73212366Sjchandra# include "globals_bsd.hpp" 74212366Sjchandra#endif 75212366Sjchandra#ifdef TARGET_OS_ARCH_linux_x86 76212366Sjchandra# include "globals_linux_x86.hpp" 77198629Srrs#endif 78198629Srrs#ifdef TARGET_OS_ARCH_linux_sparc 79212366Sjchandra# include "globals_linux_sparc.hpp" 80212366Sjchandra#endif 81212366Sjchandra#ifdef TARGET_OS_ARCH_linux_zero 82212366Sjchandra# include "globals_linux_zero.hpp" 83198629Srrs#endif 84212366Sjchandra#ifdef TARGET_OS_ARCH_solaris_x86 85212366Sjchandra# include "globals_solaris_x86.hpp" 86212366Sjchandra#endif 87212366Sjchandra#ifdef TARGET_OS_ARCH_solaris_sparc 88212366Sjchandra# include "globals_solaris_sparc.hpp" 89212366Sjchandra#endif 90212366Sjchandra#ifdef TARGET_OS_ARCH_windows_x86 91212366Sjchandra# include "globals_windows_x86.hpp" 92212366Sjchandra#endif 93212366Sjchandra#ifdef TARGET_OS_ARCH_linux_arm 94212366Sjchandra# include "globals_linux_arm.hpp" 95212366Sjchandra#endif 96212366Sjchandra#ifdef TARGET_OS_ARCH_linux_ppc 97212366Sjchandra# include "globals_linux_ppc.hpp" 98212366Sjchandra#endif 99212366Sjchandra#ifdef TARGET_OS_ARCH_linux_aarch64 100198629Srrs# include "globals_linux_aarch64.hpp" 101198629Srrs#endif 102212366Sjchandra#ifdef TARGET_OS_ARCH_aix_ppc 103212366Sjchandra# include "globals_aix_ppc.hpp" 104198629Srrs#endif 105212366Sjchandra#ifdef TARGET_OS_ARCH_bsd_x86 106198629Srrs# include "globals_bsd_x86.hpp" 107198629Srrs#endif 108198629Srrs#ifdef TARGET_OS_ARCH_bsd_zero 109198629Srrs# include "globals_bsd_zero.hpp" 110212366Sjchandra#endif 111212366Sjchandra#ifdef COMPILER1 112212366Sjchandra#ifdef TARGET_ARCH_x86 113212366Sjchandra# include "c1_globals_x86.hpp" 114212366Sjchandra#endif 115212366Sjchandra#ifdef TARGET_ARCH_sparc 116212366Sjchandra# include "c1_globals_sparc.hpp" 117212366Sjchandra#endif 118212366Sjchandra#ifdef TARGET_ARCH_arm 119212366Sjchandra# include "c1_globals_arm.hpp" 120212366Sjchandra#endif 121212366Sjchandra#ifdef TARGET_ARCH_aarch64 122212366Sjchandra# include "c1_globals_aarch64.hpp" 123212366Sjchandra#endif 124212366Sjchandra#ifdef TARGET_OS_FAMILY_linux 125198629Srrs# include "c1_globals_linux.hpp" 126212366Sjchandra#endif 127212366Sjchandra#ifdef TARGET_OS_FAMILY_solaris 128212366Sjchandra# include "c1_globals_solaris.hpp" 129212366Sjchandra#endif 130212366Sjchandra#ifdef TARGET_OS_FAMILY_windows 131212366Sjchandra# include "c1_globals_windows.hpp" 132212366Sjchandra#endif 133212366Sjchandra#ifdef TARGET_OS_FAMILY_aix 134212366Sjchandra# include "c1_globals_aix.hpp" 135212366Sjchandra#endif 136212366Sjchandra#ifdef TARGET_OS_FAMILY_bsd 137212366Sjchandra# include "c1_globals_bsd.hpp" 138212366Sjchandra#endif 139212366Sjchandra#ifdef TARGET_ARCH_ppc 140198629Srrs# include "c1_globals_ppc.hpp" 141212366Sjchandra#endif 142212366Sjchandra#endif 143212366Sjchandra#ifdef COMPILER2 144212366Sjchandra#ifdef TARGET_ARCH_x86 145212366Sjchandra# include "c2_globals_x86.hpp" 146212366Sjchandra#endif 147212366Sjchandra#ifdef TARGET_ARCH_sparc 148198629Srrs# include "c2_globals_sparc.hpp" 149212366Sjchandra#endif 150212366Sjchandra#ifdef TARGET_ARCH_arm 151212366Sjchandra# include "c2_globals_arm.hpp" 152212366Sjchandra#endif 153212366Sjchandra#ifdef TARGET_ARCH_ppc 154212366Sjchandra# include "c2_globals_ppc.hpp" 155212366Sjchandra#endif 156212366Sjchandra#ifdef TARGET_ARCH_aarch64 157212366Sjchandra# include "c2_globals_aarch64.hpp" 158212366Sjchandra#endif 159212366Sjchandra#ifdef TARGET_OS_FAMILY_linux 160198629Srrs# include "c2_globals_linux.hpp" 161212366Sjchandra#endif 162212366Sjchandra#ifdef TARGET_OS_FAMILY_solaris 163212366Sjchandra# include "c2_globals_solaris.hpp" 164212366Sjchandra#endif 165212366Sjchandra#ifdef TARGET_OS_FAMILY_windows 166212366Sjchandra# include "c2_globals_windows.hpp" 167212366Sjchandra#endif 168198629Srrs#ifdef TARGET_OS_FAMILY_aix 169212366Sjchandra# include "c2_globals_aix.hpp" 170212366Sjchandra#endif 171212366Sjchandra#ifdef TARGET_OS_FAMILY_bsd 172212366Sjchandra# include "c2_globals_bsd.hpp" 173212366Sjchandra#endif 174212366Sjchandra#endif 175212366Sjchandra#ifdef SHARK 176212366Sjchandra#ifdef TARGET_ARCH_zero 177212366Sjchandra# include "shark_globals_zero.hpp" 178212366Sjchandra#endif 179212366Sjchandra#endif 180212366Sjchandra 181212366Sjchandra#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 182212366Sjchandradefine_pd_global(bool, BackgroundCompilation, false); 183212366Sjchandradefine_pd_global(bool, UseTLAB, false); 184198629Srrsdefine_pd_global(bool, CICompileOSR, false); 185212366Sjchandradefine_pd_global(bool, UseTypeProfile, false); 186212366Sjchandradefine_pd_global(bool, UseOnStackReplacement, false); 187212366Sjchandradefine_pd_global(bool, InlineIntrinsics, false); 188212366Sjchandradefine_pd_global(bool, PreferInterpreterNativeStubs, true); 189212366Sjchandradefine_pd_global(bool, ProfileInterpreter, false); 190212366Sjchandradefine_pd_global(bool, ProfileTraps, false); 191212366Sjchandradefine_pd_global(bool, TieredCompilation, false); 192211994Sjchandra 193212366Sjchandradefine_pd_global(intx, CompileThreshold, 0); 194212366Sjchandra 195212366Sjchandradefine_pd_global(intx, OnStackReplacePercentage, 0); 196212366Sjchandradefine_pd_global(bool, ResizeTLAB, false); 197212366Sjchandradefine_pd_global(intx, FreqInlineSize, 0); 198212366Sjchandradefine_pd_global(size_t, NewSizeThreadIncrease, 4*K); 199212366Sjchandradefine_pd_global(intx, InlineClassNatives, true); 200212366Sjchandradefine_pd_global(intx, InlineUnsafeOps, true); 201212366Sjchandradefine_pd_global(intx, InitialCodeCacheSize, 160*K); 202212366Sjchandradefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 203212366Sjchandradefine_pd_global(intx, NonProfiledCodeHeapSize, 0); 204211994Sjchandradefine_pd_global(intx, ProfiledCodeHeapSize, 0); 205212366Sjchandradefine_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 206212366Sjchandra 207212366Sjchandradefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 208212366Sjchandradefine_pd_global(intx, CodeCacheMinBlockLength, 1); 209212366Sjchandradefine_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 210212366Sjchandradefine_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 211212366Sjchandradefine_pd_global(bool, NeverActAsServerClassMachine, true); 212211994Sjchandradefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 213212366Sjchandra#define CI_COMPILER_COUNT 0 214211994Sjchandra#else 215212366Sjchandra 216212366Sjchandra#if defined(COMPILER2) || INCLUDE_JVMCI 217212366Sjchandra#define CI_COMPILER_COUNT 2 218212366Sjchandra#else 219212366Sjchandra#define CI_COMPILER_COUNT 1 220212366Sjchandra#endif // COMPILER2 || INCLUDE_JVMCI 221212366Sjchandra 222212366Sjchandra#endif // no compilers 223212366Sjchandra 224212366Sjchandra// string type aliases used only in this file 225212366Sjchandratypedef const char* ccstr; 226212366Sjchandratypedef const char* ccstrlist; // represents string arguments which accumulate 227212366Sjchandra 228212366Sjchandrastruct Flag { 229212366Sjchandra enum Flags { 230212366Sjchandra // value origin 231212366Sjchandra DEFAULT = 0, 232212366Sjchandra COMMAND_LINE = 1, 233211994Sjchandra ENVIRON_VAR = 2, 234212366Sjchandra CONFIG_FILE = 3, 235212366Sjchandra MANAGEMENT = 4, 236212366Sjchandra ERGONOMIC = 5, 237212366Sjchandra ATTACH_ON_DEMAND = 6, 238212366Sjchandra INTERNAL = 7, 239212366Sjchandra 240212366Sjchandra LAST_VALUE_ORIGIN = INTERNAL, 241212366Sjchandra VALUE_ORIGIN_BITS = 4, 242212366Sjchandra VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 243212366Sjchandra 244212366Sjchandra // flag kind 245212366Sjchandra KIND_PRODUCT = 1 << 4, 246212366Sjchandra KIND_MANAGEABLE = 1 << 5, 247212366Sjchandra KIND_DIAGNOSTIC = 1 << 6, 248212366Sjchandra KIND_EXPERIMENTAL = 1 << 7, 249212366Sjchandra KIND_NOT_PRODUCT = 1 << 8, 250212366Sjchandra KIND_DEVELOP = 1 << 9, 251211994Sjchandra KIND_PLATFORM_DEPENDENT = 1 << 10, 252212366Sjchandra KIND_READ_WRITE = 1 << 11, 253212366Sjchandra KIND_C1 = 1 << 12, 254212366Sjchandra KIND_C2 = 1 << 13, 255212366Sjchandra KIND_ARCH = 1 << 14, 256212366Sjchandra KIND_SHARK = 1 << 15, 257212366Sjchandra KIND_LP64_PRODUCT = 1 << 16, 258212366Sjchandra KIND_COMMERCIAL = 1 << 17, 259212366Sjchandra KIND_JVMCI = 1 << 18, 260212366Sjchandra 261212366Sjchandra KIND_MASK = ~VALUE_ORIGIN_MASK 262212366Sjchandra }; 263212366Sjchandra 264212366Sjchandra enum Error { 265212366Sjchandra // no error 266212366Sjchandra SUCCESS = 0, 267211994Sjchandra // flag name is missing 268212366Sjchandra MISSING_NAME, 269212366Sjchandra // flag value is missing 270212366Sjchandra MISSING_VALUE, 271212366Sjchandra // error parsing the textual form of the value 272212366Sjchandra WRONG_FORMAT, 273212366Sjchandra // flag is not writeable 274212366Sjchandra NON_WRITABLE, 275212366Sjchandra // flag value is outside of its bounds 276212366Sjchandra OUT_OF_BOUNDS, 277212366Sjchandra // flag value violates its constraint 278212366Sjchandra VIOLATES_CONSTRAINT, 279212366Sjchandra // there is no flag with the given name 280212366Sjchandra INVALID_FLAG, 281212366Sjchandra // other, unspecified error related to setting the flag 282212366Sjchandra ERR_OTHER 283212366Sjchandra }; 284212366Sjchandra 285211994Sjchandra enum MsgType { 286212366Sjchandra NONE = 0, 287211994Sjchandra DIAGNOSTIC_FLAG_BUT_LOCKED, 288212366Sjchandra EXPERIMENTAL_FLAG_BUT_LOCKED, 289212366Sjchandra DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 290212366Sjchandra NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 291211994Sjchandra }; 292212366Sjchandra 293212366Sjchandra const char* _type; 294211994Sjchandra const char* _name; 295212366Sjchandra void* _addr; 296212366Sjchandra NOT_PRODUCT(const char* _doc;) 297212366Sjchandra Flags _flags; 298211994Sjchandra 299212366Sjchandra // points to all Flags static array 300212366Sjchandra static Flag* flags; 301211994Sjchandra 302212366Sjchandra // number of flags 303212366Sjchandra static size_t numFlags; 304212366Sjchandra 305211994Sjchandra static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 306212366Sjchandra static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 307212366Sjchandra static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 308212366Sjchandra 309212366Sjchandra void check_writable(); 310212366Sjchandra 311212366Sjchandra bool is_bool() const; 312212366Sjchandra bool get_bool() const; 313211994Sjchandra void set_bool(bool value); 314211994Sjchandra 315211994Sjchandra bool is_int() const; 316211994Sjchandra int get_int() const; 317211994Sjchandra void set_int(int value); 318211994Sjchandra 319211994Sjchandra bool is_uint() const; 320211994Sjchandra uint get_uint() const; 321211994Sjchandra void set_uint(uint value); 322212366Sjchandra 323211994Sjchandra bool is_intx() const; 324211994Sjchandra intx get_intx() const; 325211994Sjchandra void set_intx(intx value); 326212366Sjchandra 327211994Sjchandra bool is_uintx() const; 328211994Sjchandra uintx get_uintx() const; 329212366Sjchandra void set_uintx(uintx value); 330212366Sjchandra 331211994Sjchandra bool is_uint64_t() const; 332211994Sjchandra uint64_t get_uint64_t() const; 333212366Sjchandra void set_uint64_t(uint64_t value); 334211994Sjchandra 335211994Sjchandra bool is_size_t() const; 336212366Sjchandra size_t get_size_t() const; 337212366Sjchandra void set_size_t(size_t value); 338211994Sjchandra 339211994Sjchandra bool is_double() const; 340212366Sjchandra double get_double() const; 341211994Sjchandra void set_double(double value); 342211994Sjchandra 343212366Sjchandra bool is_ccstr() const; 344212366Sjchandra bool ccstr_accumulates() const; 345211994Sjchandra ccstr get_ccstr() const; 346211994Sjchandra void set_ccstr(ccstr value); 347212366Sjchandra 348211994Sjchandra Flags get_origin(); 349211994Sjchandra void set_origin(Flags origin); 350212758Sjchandra 351211994Sjchandra bool is_default(); 352211994Sjchandra bool is_ergonomic(); 353211994Sjchandra bool is_command_line(); 354211994Sjchandra 355212366Sjchandra bool is_product() const; 356212366Sjchandra bool is_manageable() const; 357212366Sjchandra bool is_diagnostic() const; 358212366Sjchandra bool is_experimental() const; 359212366Sjchandra bool is_notproduct() const; 360211994Sjchandra bool is_develop() const; 361212366Sjchandra bool is_read_write() const; 362212366Sjchandra bool is_commercial() const; 363212366Sjchandra 364212366Sjchandra bool is_constant_in_binary() const; 365212366Sjchandra 366212366Sjchandra bool is_unlocker() const; 367211994Sjchandra bool is_unlocked() const; 368211994Sjchandra bool is_writeable() const; 369212758Sjchandra bool is_external() const; 370211994Sjchandra 371211994Sjchandra bool is_unlocker_ext() const; 372212758Sjchandra bool is_unlocked_ext() const; 373211994Sjchandra bool is_writeable_ext() const; 374211994Sjchandra bool is_external_ext() const; 375211994Sjchandra 376211994Sjchandra void unlock_diagnostic(); 377211994Sjchandra 378212366Sjchandra Flag::MsgType get_locked_message(char*, int) const; 379212366Sjchandra void get_locked_message_ext(char*, int) const; 380212366Sjchandra 381212366Sjchandra // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 382212366Sjchandra void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 383211994Sjchandra void print_kind(outputStream* st); 384211994Sjchandra void print_as_flag(outputStream* st); 385211994Sjchandra 386211994Sjchandra static const char* flag_error_str(Flag::Error error); 387212758Sjchandra}; 388211994Sjchandra 389211994Sjchandra// debug flags control various aspects of the VM and are global accessible 390211994Sjchandra 391212366Sjchandra// use FlagSetting to temporarily change some debug flag 392212366Sjchandra// e.g. FlagSetting fs(DebugThisAndThat, true); 393212366Sjchandra// restored to previous value upon leaving scope 394212366Sjchandraclass FlagSetting { 395212366Sjchandra bool val; 396211994Sjchandra bool* flag; 397211994Sjchandra public: 398212758Sjchandra FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 399212758Sjchandra ~FlagSetting() { *flag = val; } 400212758Sjchandra}; 401212758Sjchandra 402212758Sjchandra 403212758Sjchandraclass CounterSetting { 404212758Sjchandra intx* counter; 405212758Sjchandra public: 406212758Sjchandra CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 407212758Sjchandra ~CounterSetting() { (*counter)--; } 408212758Sjchandra}; 409212758Sjchandra 410212758Sjchandraclass IntFlagSetting { 411212758Sjchandra int val; 412212758Sjchandra int* flag; 413212758Sjchandra public: 414212758Sjchandra IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 415212758Sjchandra ~IntFlagSetting() { *flag = val; } 416212758Sjchandra}; 417212758Sjchandra 418212758Sjchandraclass UIntFlagSetting { 419212366Sjchandra uint val; 420212896Sjchandra uint* flag; 421212896Sjchandra public: 422212896Sjchandra UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 423212896Sjchandra ~UIntFlagSetting() { *flag = val; } 424212896Sjchandra}; 425212896Sjchandra 426212896Sjchandraclass UIntXFlagSetting { 427212896Sjchandra uintx val; 428212758Sjchandra uintx* flag; 429212758Sjchandra public: 430211994Sjchandra UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 431212366Sjchandra ~UIntXFlagSetting() { *flag = val; } 432212366Sjchandra}; 433212758Sjchandra 434212366Sjchandraclass DoubleFlagSetting { 435211994Sjchandra double val; 436212366Sjchandra double* flag; 437212896Sjchandra public: 438212957Sjchandra DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 439212896Sjchandra ~DoubleFlagSetting() { *flag = val; } 440212896Sjchandra}; 441212896Sjchandra 442212896Sjchandraclass SizeTFlagSetting { 443212896Sjchandra size_t val; 444212896Sjchandra size_t* flag; 445212896Sjchandra public: 446212896Sjchandra SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 447212896Sjchandra ~SizeTFlagSetting() { *flag = val; } 448212896Sjchandra}; 449212896Sjchandra 450212896Sjchandra 451212896Sjchandraclass CommandLineFlags { 452212896Sjchandrapublic: 453212896Sjchandra static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 454212758Sjchandra static Flag::Error boolAt(const char* name, bool* value, bool allow_locked = false, bool return_flag = false) { return boolAt(name, strlen(name), value, allow_locked, return_flag); } 455212758Sjchandra static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 456212366Sjchandra static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 457212758Sjchandra static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 458211994Sjchandra 459212366Sjchandra static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 460212366Sjchandra static Flag::Error intAt(const char* name, int* value, bool allow_locked = false, bool return_flag = false) { return intAt(name, strlen(name), value, allow_locked, return_flag); } 461212366Sjchandra static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 462212366Sjchandra static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 463212758Sjchandra static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 464212366Sjchandra 465212366Sjchandra static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 466212366Sjchandra static Flag::Error uintAt(const char* name, uint* value, bool allow_locked = false, bool return_flag = false) { return uintAt(name, strlen(name), value, allow_locked, return_flag); } 467211994Sjchandra static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 468212366Sjchandra static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 469212366Sjchandra static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 470212896Sjchandra 471212896Sjchandra static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 472212758Sjchandra static Flag::Error intxAt(const char* name, intx* value, bool allow_locked = false, bool return_flag = false) { return intxAt(name, strlen(name), value, allow_locked, return_flag); } 473212896Sjchandra static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 474212896Sjchandra static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 475212896Sjchandra static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 476212896Sjchandra 477212896Sjchandra static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 478212896Sjchandra static Flag::Error uintxAt(const char* name, uintx* value, bool allow_locked = false, bool return_flag = false) { return uintxAt(name, strlen(name), value, allow_locked, return_flag); } 479212896Sjchandra static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 480212896Sjchandra static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 481212896Sjchandra static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 482212896Sjchandra 483212896Sjchandra static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 484213441Sjchandra static Flag::Error size_tAt(const char* name, size_t* value, bool allow_locked = false, bool return_flag = false) { return size_tAt(name, strlen(name), value, allow_locked, return_flag); } 485213441Sjchandra static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 486213441Sjchandra static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 487213441Sjchandra static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 488213441Sjchandra 489212896Sjchandra static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 490213441Sjchandra static Flag::Error uint64_tAt(const char* name, uint64_t* value, bool allow_locked = false, bool return_flag = false) { return uint64_tAt(name, strlen(name), value, allow_locked, return_flag); } 491213441Sjchandra static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 492213441Sjchandra static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 493212896Sjchandra static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 494212896Sjchandra 495212896Sjchandra static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 496212896Sjchandra static Flag::Error doubleAt(const char* name, double* value, bool allow_locked = false, bool return_flag = false) { return doubleAt(name, strlen(name), value, allow_locked, return_flag); } 497212896Sjchandra static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 498212758Sjchandra static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 499212366Sjchandra static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 500212758Sjchandra 501212758Sjchandra static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 502212366Sjchandra static Flag::Error ccstrAt(const char* name, ccstr* value, bool allow_locked = false, bool return_flag = false) { return ccstrAt(name, strlen(name), value, allow_locked, return_flag); } 503212758Sjchandra // Contract: Flag will make private copy of the incoming value. 504212758Sjchandra // Outgoing value is always malloc-ed, and caller MUST call free. 505212366Sjchandra static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 506212366Sjchandra static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 507212896Sjchandra 508212896Sjchandra // Returns false if name is not a command line flag. 509213441Sjchandra static bool wasSetOnCmdline(const char* name, bool* value); 510213441Sjchandra static void printSetFlags(outputStream* out); 511213441Sjchandra 512213441Sjchandra // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 513212896Sjchandra static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 514212896Sjchandra 515212896Sjchandra static void verify() PRODUCT_RETURN; 516213441Sjchandra}; 517212758Sjchandra 518212366Sjchandra// use this for flags that are true by default in the debug version but 519212758Sjchandra// false in the optimized version, and vice versa 520211994Sjchandra#ifdef ASSERT 521212366Sjchandra#define trueInDebug true 522211994Sjchandra#define falseInDebug false 523212758Sjchandra#else 524212758Sjchandra#define trueInDebug false 525212758Sjchandra#define falseInDebug true 526212758Sjchandra#endif 527212758Sjchandra 528212758Sjchandra// use this for flags that are true per default in the product build 529212758Sjchandra// but false in development builds, and vice versa 530212758Sjchandra#ifdef PRODUCT 531212758Sjchandra#define trueInProduct true 532212758Sjchandra#define falseInProduct false 533212758Sjchandra#else 534212758Sjchandra#define trueInProduct false 535212758Sjchandra#define falseInProduct true 536212758Sjchandra#endif 537212758Sjchandra 538212896Sjchandra#ifdef JAVASE_EMBEDDED 539212896Sjchandra#define falseInEmbedded false 540212896Sjchandra#else 541212896Sjchandra#define falseInEmbedded true 542212896Sjchandra#endif 543212896Sjchandra 544212896Sjchandra// develop flags are settable / visible only during development and are constant in the PRODUCT version 545212758Sjchandra// product flags are always settable / visible 546212758Sjchandra// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 547212758Sjchandra 548212758Sjchandra// A flag must be declared with one of the following types: 549212758Sjchandra// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 550212758Sjchandra// The type "ccstr" is an alias for "const char*" and is used 551212758Sjchandra// only in this file, because the macrology requires single-token type names. 552212758Sjchandra 553212758Sjchandra// Note: Diagnostic options not meant for VM tuning or for product modes. 554212758Sjchandra// They are to be used for VM quality assurance or field diagnosis 555212758Sjchandra// of VM bugs. They are hidden so that users will not be encouraged to 556212758Sjchandra// try them as if they were VM ordinary execution options. However, they 557212758Sjchandra// are available in the product version of the VM. Under instruction 558212758Sjchandra// from support engineers, VM customers can turn them on to collect 559212758Sjchandra// diagnostic information about VM problems. To use a VM diagnostic 560212896Sjchandra// option, you must first specify +UnlockDiagnosticVMOptions. 561212758Sjchandra// (This master switch also affects the behavior of -Xprintflags.) 562213377Sjchandra// 563213377Sjchandra// experimental flags are in support of features that are not 564213377Sjchandra// part of the officially supported product, but are available 565213377Sjchandra// for experimenting with. They could, for example, be performance 566213377Sjchandra// features that may not have undergone full or rigorous QA, but which may 567213377Sjchandra// help performance in some cases and released for experimentation 568213377Sjchandra// by the community of users and developers. This flag also allows one to 569213377Sjchandra// be able to build a fully supported product that nonetheless also 570213377Sjchandra// ships with some unsupported, lightly tested, experimental features. 571213377Sjchandra// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 572213377Sjchandra// UnlockExperimentalVMOptions flag, which allows the control and 573213377Sjchandra// modification of the experimental flags. 574213377Sjchandra// 575211994Sjchandra// Nota bene: neither diagnostic nor experimental options should be used casually, 576211994Sjchandra// and they are not supported on production loads, except under explicit 577211994Sjchandra// direction from support engineers. 578211994Sjchandra// 579198629Srrs// manageable flags are writeable external product flags. 580// They are dynamically writeable through the JDK management interface 581// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 582// These flags are external exported interface (see CCC). The list of 583// manageable flags can be queried programmatically through the management 584// interface. 585// 586// A flag can be made as "manageable" only if 587// - the flag is defined in a CCC as an external exported interface. 588// - the VM implementation supports dynamic setting of the flag. 589// This implies that the VM must *always* query the flag variable 590// and not reuse state related to the flag state at any given time. 591// - you want the flag to be queried programmatically by the customers. 592// 593// product_rw flags are writeable internal product flags. 594// They are like "manageable" flags but for internal/private use. 595// The list of product_rw flags are internal/private flags which 596// may be changed/removed in a future release. It can be set 597// through the management interface to get/set value 598// when the name of flag is supplied. 599// 600// A flag can be made as "product_rw" only if 601// - the VM implementation supports dynamic setting of the flag. 602// This implies that the VM must *always* query the flag variable 603// and not reuse state related to the flag state at any given time. 604// 605// Note that when there is a need to support develop flags to be writeable, 606// it can be done in the same way as product_rw. 607// 608// range is a macro that will expand to min and max arguments for range 609// checking code if provided - see commandLineFlagRangeList.hpp 610// 611// constraint is a macro that will expand to custom function call 612// for constraint checking if provided - see commandLineFlagConstraintList.hpp 613// 614 615#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 616 \ 617 lp64_product(bool, UseCompressedOops, false, \ 618 "Use 32-bit object references in 64-bit VM. " \ 619 "lp64_product means flag is always constant in 32 bit VM") \ 620 \ 621 lp64_product(bool, UseCompressedClassPointers, false, \ 622 "Use 32-bit class pointers in 64-bit VM. " \ 623 "lp64_product means flag is always constant in 32 bit VM") \ 624 \ 625 notproduct(bool, CheckCompressedOops, true, \ 626 "Generate checks in encoding/decoding code in debug VM") \ 627 \ 628 product_pd(size_t, HeapBaseMinAddress, \ 629 "OS specific low limit for heap base address") \ 630 \ 631 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 632 "Heap allocation steps through preferred address regions to find" \ 633 " where it can allocate the heap. Number of steps to take per " \ 634 "region.") \ 635 range(1, max_uintx) \ 636 \ 637 diagnostic(bool, PrintCompressedOopsMode, false, \ 638 "Print compressed oops base address and encoding mode") \ 639 \ 640 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 641 "Default object alignment in bytes, 8 is minimum") \ 642 range(8, 256) \ 643 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 644 \ 645 product(bool, AssumeMP, false, \ 646 "Instruct the VM to assume multiple processors are available") \ 647 \ 648 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 649 /* removal testing. It was supposed to be removed before FCS but has */ \ 650 /* been re-added (see 6401008) */ \ 651 product_pd(bool, UseMembar, \ 652 "(Unstable) Issues membars on thread state transitions") \ 653 \ 654 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 655 "Clean the chunk pool asynchronously") \ 656 \ 657 experimental(bool, AlwaysSafeConstructors, false, \ 658 "Force safe construction, as if all fields are final.") \ 659 \ 660 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 661 "Enable normal processing of flags relating to field diagnostics")\ 662 \ 663 experimental(bool, UnlockExperimentalVMOptions, false, \ 664 "Enable normal processing of flags relating to experimental " \ 665 "features") \ 666 \ 667 product(bool, JavaMonitorsInStackTrace, true, \ 668 "Print information about Java monitor locks when the stacks are" \ 669 "dumped") \ 670 \ 671 product_pd(bool, UseLargePages, \ 672 "Use large page memory") \ 673 \ 674 product_pd(bool, UseLargePagesIndividualAllocation, \ 675 "Allocate large pages individually for better affinity") \ 676 \ 677 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 678 "Fail large pages individual allocation") \ 679 \ 680 product(bool, UseLargePagesInMetaspace, false, \ 681 "Use large page memory in metaspace. " \ 682 "Only used if UseLargePages is enabled.") \ 683 \ 684 develop(bool, TracePageSizes, false, \ 685 "Trace page size selection and usage") \ 686 \ 687 product(bool, UseNUMA, false, \ 688 "Use NUMA if available") \ 689 \ 690 product(bool, UseNUMAInterleaving, false, \ 691 "Interleave memory across NUMA nodes if available") \ 692 \ 693 product(size_t, NUMAInterleaveGranularity, 2*M, \ 694 "Granularity to use for NUMA interleaving on Windows OS") \ 695 \ 696 product(bool, ForceNUMA, false, \ 697 "Force NUMA optimizations on single-node/UMA systems") \ 698 \ 699 product(uintx, NUMAChunkResizeWeight, 20, \ 700 "Percentage (0-100) used to weight the current sample when " \ 701 "computing exponentially decaying average for " \ 702 "AdaptiveNUMAChunkSizing") \ 703 range(0, 100) \ 704 \ 705 product(size_t, NUMASpaceResizeRate, 1*G, \ 706 "Do not reallocate more than this amount per collection") \ 707 \ 708 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 709 "Enable adaptive chunk sizing for NUMA") \ 710 \ 711 product(bool, NUMAStats, false, \ 712 "Print NUMA stats in detailed heap information") \ 713 \ 714 product(uintx, NUMAPageScanRate, 256, \ 715 "Maximum number of pages to include in the page scan procedure") \ 716 \ 717 product_pd(bool, NeedsDeoptSuspend, \ 718 "True for register window machines (sparc/ia64)") \ 719 \ 720 product(intx, UseSSE, 99, \ 721 "Highest supported SSE instructions set on x86/x64") \ 722 range(0, 99) \ 723 \ 724 product(bool, UseAES, false, \ 725 "Control whether AES instructions can be used on x86/x64") \ 726 \ 727 product(bool, UseSHA, false, \ 728 "Control whether SHA instructions can be used " \ 729 "on SPARC and on ARM") \ 730 \ 731 product(bool, UseGHASHIntrinsics, false, \ 732 "Use intrinsics for GHASH versions of crypto") \ 733 \ 734 product(size_t, LargePageSizeInBytes, 0, \ 735 "Large page size (0 to let VM choose the page size)") \ 736 \ 737 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 738 "Use large pages if maximum heap is at least this big") \ 739 \ 740 product(bool, ForceTimeHighResolution, false, \ 741 "Using high time resolution (for Win32 only)") \ 742 \ 743 develop(bool, TraceItables, false, \ 744 "Trace initialization and use of itables") \ 745 \ 746 develop(bool, TracePcPatching, false, \ 747 "Trace usage of frame::patch_pc") \ 748 \ 749 develop(bool, TraceJumps, false, \ 750 "Trace assembly jumps in thread ring buffer") \ 751 \ 752 develop(bool, TraceRelocator, false, \ 753 "Trace the bytecode relocator") \ 754 \ 755 develop(bool, TraceLongCompiles, false, \ 756 "Print out every time compilation is longer than " \ 757 "a given threshold") \ 758 \ 759 develop(bool, SafepointALot, false, \ 760 "Generate a lot of safepoints. This works with " \ 761 "GuaranteedSafepointInterval") \ 762 \ 763 product_pd(bool, BackgroundCompilation, \ 764 "A thread requesting compilation is not blocked during " \ 765 "compilation") \ 766 \ 767 product(bool, PrintVMQWaitTime, false, \ 768 "Print out the waiting time in VM operation queue") \ 769 \ 770 develop(bool, TraceOopMapGeneration, false, \ 771 "Show OopMapGeneration") \ 772 \ 773 product(bool, MethodFlushing, true, \ 774 "Reclamation of zombie and not-entrant methods") \ 775 \ 776 develop(bool, VerifyStack, false, \ 777 "Verify stack of each thread when it is entering a runtime call") \ 778 \ 779 diagnostic(bool, ForceUnreachable, false, \ 780 "Make all non code cache addresses to be unreachable by " \ 781 "forcing use of 64bit literal fixups") \ 782 \ 783 notproduct(bool, StressDerivedPointers, false, \ 784 "Force scavenge when a derived pointer is detected on stack " \ 785 "after rtm call") \ 786 \ 787 develop(bool, TraceDerivedPointers, false, \ 788 "Trace traversal of derived pointers on stack") \ 789 \ 790 notproduct(bool, TraceCodeBlobStacks, false, \ 791 "Trace stack-walk of codeblobs") \ 792 \ 793 product(bool, PrintJNIResolving, false, \ 794 "Used to implement -v:jni") \ 795 \ 796 notproduct(bool, PrintRewrites, false, \ 797 "Print methods that are being rewritten") \ 798 \ 799 product(bool, UseInlineCaches, true, \ 800 "Use Inline Caches for virtual calls ") \ 801 \ 802 develop(bool, InlineArrayCopy, true, \ 803 "Inline arraycopy native that is known to be part of " \ 804 "base library DLL") \ 805 \ 806 develop(bool, InlineObjectHash, true, \ 807 "Inline Object::hashCode() native that is known to be part " \ 808 "of base library DLL") \ 809 \ 810 develop(bool, InlineNatives, true, \ 811 "Inline natives that are known to be part of base library DLL") \ 812 \ 813 develop(bool, InlineMathNatives, true, \ 814 "Inline SinD, CosD, etc.") \ 815 \ 816 develop(bool, InlineClassNatives, true, \ 817 "Inline Class.isInstance, etc") \ 818 \ 819 develop(bool, InlineThreadNatives, true, \ 820 "Inline Thread.currentThread, etc") \ 821 \ 822 develop(bool, InlineUnsafeOps, true, \ 823 "Inline memory ops (native methods) from Unsafe") \ 824 \ 825 product(bool, CriticalJNINatives, true, \ 826 "Check for critical JNI entry points") \ 827 \ 828 notproduct(bool, StressCriticalJNINatives, false, \ 829 "Exercise register saving code in critical natives") \ 830 \ 831 product(bool, UseSSE42Intrinsics, false, \ 832 "SSE4.2 versions of intrinsics") \ 833 \ 834 product(bool, UseAESIntrinsics, false, \ 835 "Use intrinsics for AES versions of crypto") \ 836 \ 837 product(bool, UseSHA1Intrinsics, false, \ 838 "Use intrinsics for SHA-1 crypto hash function. " \ 839 "Requires that UseSHA is enabled.") \ 840 \ 841 product(bool, UseSHA256Intrinsics, false, \ 842 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 843 "Requires that UseSHA is enabled.") \ 844 \ 845 product(bool, UseSHA512Intrinsics, false, \ 846 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 847 "Requires that UseSHA is enabled.") \ 848 \ 849 product(bool, UseCRC32Intrinsics, false, \ 850 "use intrinsics for java.util.zip.CRC32") \ 851 \ 852 product(bool, UseCRC32CIntrinsics, false, \ 853 "use intrinsics for java.util.zip.CRC32C") \ 854 \ 855 product(bool, UseAdler32Intrinsics, false, \ 856 "use intrinsics for java.util.zip.Adler32") \ 857 \ 858 diagnostic(ccstrlist, DisableIntrinsic, "", \ 859 "do not expand intrinsics whose (internal) names appear here") \ 860 \ 861 develop(bool, TraceCallFixup, false, \ 862 "Trace all call fixups") \ 863 \ 864 develop(bool, DeoptimizeALot, false, \ 865 "Deoptimize at every exit from the runtime system") \ 866 \ 867 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 868 "A comma separated list of bcis to deoptimize at") \ 869 \ 870 product(bool, DeoptimizeRandom, false, \ 871 "Deoptimize random frames on random exit from the runtime system")\ 872 \ 873 notproduct(bool, ZombieALot, false, \ 874 "Create zombies (non-entrant) at exit from the runtime system") \ 875 \ 876 product(bool, UnlinkSymbolsALot, false, \ 877 "Unlink unreferenced symbols from the symbol table at safepoints")\ 878 \ 879 notproduct(bool, WalkStackALot, false, \ 880 "Trace stack (no print) at every exit from the runtime system") \ 881 \ 882 product(bool, Debugging, false, \ 883 "Set when executing debug methods in debug.cpp " \ 884 "(to prevent triggering assertions)") \ 885 \ 886 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 887 "Enable strict checks that safepoints cannot happen for threads " \ 888 "that use No_Safepoint_Verifier") \ 889 \ 890 notproduct(bool, VerifyLastFrame, false, \ 891 "Verify oops on last frame on entry to VM") \ 892 \ 893 develop(bool, TraceHandleAllocation, false, \ 894 "Print out warnings when suspiciously many handles are allocated")\ 895 \ 896 product(bool, FailOverToOldVerifier, true, \ 897 "Fail over to old verifier when split verifier fails") \ 898 \ 899 develop(bool, ShowSafepointMsgs, false, \ 900 "Show message about safepoint synchronization") \ 901 \ 902 product(bool, SafepointTimeout, false, \ 903 "Time out and warn or fail after SafepointTimeoutDelay " \ 904 "milliseconds if failed to reach safepoint") \ 905 \ 906 develop(bool, DieOnSafepointTimeout, false, \ 907 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 908 \ 909 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 910 /* typically, at most a few retries are needed */ \ 911 product(intx, SuspendRetryCount, 50, \ 912 "Maximum retry count for an external suspend request") \ 913 range(0, max_intx) \ 914 \ 915 product(intx, SuspendRetryDelay, 5, \ 916 "Milliseconds to delay per retry (* current_retry_count)") \ 917 range(0, max_intx) \ 918 \ 919 product(bool, AssertOnSuspendWaitFailure, false, \ 920 "Assert/Guarantee on external suspend wait failure") \ 921 \ 922 product(bool, TraceSuspendWaitFailures, false, \ 923 "Trace external suspend wait failures") \ 924 \ 925 product(bool, MaxFDLimit, true, \ 926 "Bump the number of file descriptors to maximum in Solaris") \ 927 \ 928 diagnostic(bool, LogEvents, true, \ 929 "Enable the various ring buffer event logs") \ 930 \ 931 diagnostic(uintx, LogEventsBufferEntries, 10, \ 932 "Number of ring buffer event logs") \ 933 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 934 \ 935 product(bool, BytecodeVerificationRemote, true, \ 936 "Enable the Java bytecode verifier for remote classes") \ 937 \ 938 product(bool, BytecodeVerificationLocal, false, \ 939 "Enable the Java bytecode verifier for local classes") \ 940 \ 941 develop(bool, ForceFloatExceptions, trueInDebug, \ 942 "Force exceptions on FP stack under/overflow") \ 943 \ 944 develop(bool, VerifyStackAtCalls, false, \ 945 "Verify that the stack pointer is unchanged after calls") \ 946 \ 947 develop(bool, TraceJavaAssertions, false, \ 948 "Trace java language assertions") \ 949 \ 950 notproduct(bool, CheckAssertionStatusDirectives, false, \ 951 "Temporary - see javaClasses.cpp") \ 952 \ 953 notproduct(bool, PrintMallocFree, false, \ 954 "Trace calls to C heap malloc/free allocation") \ 955 \ 956 product(bool, PrintOopAddress, false, \ 957 "Always print the location of the oop") \ 958 \ 959 notproduct(bool, VerifyCodeCache, false, \ 960 "Verify code cache on memory allocation/deallocation") \ 961 \ 962 develop(bool, UseMallocOnly, false, \ 963 "Use only malloc/free for allocation (no resource area/arena)") \ 964 \ 965 develop(bool, PrintMalloc, false, \ 966 "Print all malloc/free calls") \ 967 \ 968 develop(bool, PrintMallocStatistics, false, \ 969 "Print malloc/free statistics") \ 970 \ 971 develop(bool, ZapResourceArea, trueInDebug, \ 972 "Zap freed resource/arena space with 0xABABABAB") \ 973 \ 974 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 975 "Zap freed VM handle space with 0xBCBCBCBC") \ 976 \ 977 develop(bool, ZapJNIHandleArea, trueInDebug, \ 978 "Zap freed JNI handle space with 0xFEFEFEFE") \ 979 \ 980 notproduct(bool, ZapStackSegments, trueInDebug, \ 981 "Zap allocated/freed stack segments with 0xFADFADED") \ 982 \ 983 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 984 "Zap unused heap space with 0xBAADBABE") \ 985 \ 986 develop(bool, TraceZapUnusedHeapArea, false, \ 987 "Trace zapping of unused heap space") \ 988 \ 989 develop(bool, CheckZapUnusedHeapArea, false, \ 990 "Check zapping of unused heap space") \ 991 \ 992 develop(bool, ZapFillerObjects, trueInDebug, \ 993 "Zap filler objects with 0xDEAFBABE") \ 994 \ 995 develop(bool, PrintVMMessages, true, \ 996 "Print VM messages on console") \ 997 \ 998 product(bool, PrintGCApplicationConcurrentTime, false, \ 999 "Print the time the application has been running") \ 1000 \ 1001 product(bool, PrintGCApplicationStoppedTime, false, \ 1002 "Print the time the application has been stopped") \ 1003 \ 1004 diagnostic(bool, VerboseVerification, false, \ 1005 "Display detailed verification details") \ 1006 \ 1007 notproduct(uintx, ErrorHandlerTest, 0, \ 1008 "If > 0, provokes an error after VM initialization; the value " \ 1009 "determines which error to provoke. See test_error_handler() " \ 1010 "in debug.cpp.") \ 1011 \ 1012 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1013 "If > 0, provokes an error inside VM error handler (a secondary " \ 1014 "crash). see test_error_handler() in debug.cpp.") \ 1015 \ 1016 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1017 "If true, tests SafeFetch inside error handler.") \ 1018 \ 1019 develop(bool, Verbose, false, \ 1020 "Print additional debugging information from other modes") \ 1021 \ 1022 develop(bool, PrintMiscellaneous, false, \ 1023 "Print uncategorized debugging information (requires +Verbose)") \ 1024 \ 1025 develop(bool, WizardMode, false, \ 1026 "Print much more debugging information") \ 1027 \ 1028 product(bool, ShowMessageBoxOnError, false, \ 1029 "Keep process alive on VM fatal error") \ 1030 \ 1031 product(bool, CreateCoredumpOnCrash, true, \ 1032 "Create core/mini dump on VM fatal error") \ 1033 \ 1034 product(uintx, ErrorLogTimeout, 2 * 60, \ 1035 "Timeout, in seconds, to limit the time spent on writing an " \ 1036 "error log in case of a crash.") \ 1037 \ 1038 product_pd(bool, UseOSErrorReporting, \ 1039 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1040 \ 1041 product(bool, SuppressFatalErrorMessage, false, \ 1042 "Report NO fatal error message (avoid deadlock)") \ 1043 \ 1044 product(ccstrlist, OnError, "", \ 1045 "Run user-defined commands on fatal error; see VMError.cpp " \ 1046 "for examples") \ 1047 \ 1048 product(ccstrlist, OnOutOfMemoryError, "", \ 1049 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1050 \ 1051 manageable(bool, HeapDumpBeforeFullGC, false, \ 1052 "Dump heap to file before any major stop-the-world GC") \ 1053 \ 1054 manageable(bool, HeapDumpAfterFullGC, false, \ 1055 "Dump heap to file after any major stop-the-world GC") \ 1056 \ 1057 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1058 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1059 \ 1060 manageable(ccstr, HeapDumpPath, NULL, \ 1061 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1062 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1063 "in the working directory)") \ 1064 \ 1065 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1066 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 1067 "when the heap usage is larger than this") \ 1068 \ 1069 develop(size_t, HeapDumpSegmentSize, 1*G, \ 1070 "Approximate segment size when generating a segmented heap dump") \ 1071 \ 1072 develop(bool, BreakAtWarning, false, \ 1073 "Execute breakpoint upon encountering VM warning") \ 1074 \ 1075 develop(bool, TraceVMOperation, false, \ 1076 "Trace VM operations") \ 1077 \ 1078 develop(bool, UseFakeTimers, false, \ 1079 "Tell whether the VM should use system time or a fake timer") \ 1080 \ 1081 product(ccstr, NativeMemoryTracking, "off", \ 1082 "Native memory tracking options") \ 1083 \ 1084 diagnostic(bool, PrintNMTStatistics, false, \ 1085 "Print native memory tracking summary data if it is on") \ 1086 \ 1087 diagnostic(bool, LogCompilation, false, \ 1088 "Log compilation activity in detail to LogFile") \ 1089 \ 1090 product(bool, PrintCompilation, false, \ 1091 "Print compilations") \ 1092 \ 1093 diagnostic(bool, TraceNMethodInstalls, false, \ 1094 "Trace nmethod installation") \ 1095 \ 1096 diagnostic(intx, ScavengeRootsInCode, 2, \ 1097 "0: do not allow scavengable oops in the code cache; " \ 1098 "1: allow scavenging from the code cache; " \ 1099 "2: emit as many constants as the compiler can see") \ 1100 range(0, 2) \ 1101 \ 1102 product(bool, AlwaysRestoreFPU, false, \ 1103 "Restore the FPU control word after every JNI call (expensive)") \ 1104 \ 1105 diagnostic(bool, PrintCompilation2, false, \ 1106 "Print additional statistics per compilation") \ 1107 \ 1108 diagnostic(bool, PrintAdapterHandlers, false, \ 1109 "Print code generated for i2c/c2i adapters") \ 1110 \ 1111 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1112 "Verify that i2c/c2i adapters are called properly") \ 1113 \ 1114 develop(bool, VerifyAdapterSharing, false, \ 1115 "Verify that the code for shared adapters is the equivalent") \ 1116 \ 1117 diagnostic(bool, PrintAssembly, false, \ 1118 "Print assembly code (using external disassembler.so)") \ 1119 \ 1120 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1121 "Print options string passed to disassembler.so") \ 1122 \ 1123 notproduct(bool, PrintNMethodStatistics, false, \ 1124 "Print a summary statistic for the generated nmethods") \ 1125 \ 1126 diagnostic(bool, PrintNMethods, false, \ 1127 "Print assembly code for nmethods when generated") \ 1128 \ 1129 diagnostic(intx, PrintNMethodsAtLevel, -1, \ 1130 "Only print code for nmethods at the given compilation level") \ 1131 \ 1132 diagnostic(bool, PrintNativeNMethods, false, \ 1133 "Print assembly code for native nmethods when generated") \ 1134 \ 1135 develop(bool, PrintDebugInfo, false, \ 1136 "Print debug information for all nmethods when generated") \ 1137 \ 1138 develop(bool, PrintRelocations, false, \ 1139 "Print relocation information for all nmethods when generated") \ 1140 \ 1141 develop(bool, PrintDependencies, false, \ 1142 "Print dependency information for all nmethods when generated") \ 1143 \ 1144 develop(bool, PrintExceptionHandlers, false, \ 1145 "Print exception handler tables for all nmethods when generated") \ 1146 \ 1147 develop(bool, StressCompiledExceptionHandlers, false, \ 1148 "Exercise compiled exception handlers") \ 1149 \ 1150 develop(bool, InterceptOSException, false, \ 1151 "Start debugger when an implicit OS (e.g. NULL) " \ 1152 "exception happens") \ 1153 \ 1154 product(bool, PrintCodeCache, false, \ 1155 "Print the code cache memory usage when exiting") \ 1156 \ 1157 develop(bool, PrintCodeCache2, false, \ 1158 "Print detailed usage information on the code cache when exiting")\ 1159 \ 1160 product(bool, PrintCodeCacheOnCompilation, false, \ 1161 "Print the code cache memory usage each time a method is " \ 1162 "compiled") \ 1163 \ 1164 diagnostic(bool, PrintStubCode, false, \ 1165 "Print generated stub code") \ 1166 \ 1167 product(bool, StackTraceInThrowable, true, \ 1168 "Collect backtrace in throwable when exception happens") \ 1169 \ 1170 product(bool, OmitStackTraceInFastThrow, true, \ 1171 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1172 \ 1173 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1174 "Print bytecode statistics when dumping profiler output") \ 1175 \ 1176 product(bool, ProfilerRecordPC, false, \ 1177 "Collect ticks for each 16 byte interval of compiled code") \ 1178 \ 1179 product(bool, ProfileVM, false, \ 1180 "Profile ticks that fall within VM (either in the VM Thread " \ 1181 "or VM code called through stubs)") \ 1182 \ 1183 product(bool, ProfileIntervals, false, \ 1184 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1185 \ 1186 notproduct(bool, ProfilerCheckIntervals, false, \ 1187 "Collect and print information on spacing of profiler ticks") \ 1188 \ 1189 product(bool, PrintWarnings, true, \ 1190 "Print JVM warnings to output stream") \ 1191 \ 1192 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1193 "Print warnings for stalled SpinLocks") \ 1194 \ 1195 product(bool, RegisterFinalizersAtInit, true, \ 1196 "Register finalizable objects at end of Object.<init> or " \ 1197 "after allocation") \ 1198 \ 1199 develop(bool, RegisterReferences, true, \ 1200 "Tell whether the VM should register soft/weak/final/phantom " \ 1201 "references") \ 1202 \ 1203 develop(bool, IgnoreRewrites, false, \ 1204 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1205 "This is unsafe!") \ 1206 \ 1207 develop(bool, PrintCodeCacheExtension, false, \ 1208 "Print extension of code cache") \ 1209 \ 1210 develop(bool, UsePrivilegedStack, true, \ 1211 "Enable the security JVM functions") \ 1212 \ 1213 develop(bool, ProtectionDomainVerification, true, \ 1214 "Verify protection domain before resolution in system dictionary")\ 1215 \ 1216 product(bool, ClassUnloading, true, \ 1217 "Do unloading of classes") \ 1218 \ 1219 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1220 "Do unloading of classes with a concurrent marking cycle") \ 1221 \ 1222 develop(bool, DisableStartThread, false, \ 1223 "Disable starting of additional Java threads " \ 1224 "(for debugging only)") \ 1225 \ 1226 develop(bool, MemProfiling, false, \ 1227 "Write memory usage profiling to log file") \ 1228 \ 1229 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1230 "Print the system dictionary at exit") \ 1231 \ 1232 experimental(intx, PredictedLoadedClassCount, 0, \ 1233 "Experimental: Tune loaded class cache starting size") \ 1234 \ 1235 diagnostic(bool, UnsyncloadClass, false, \ 1236 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1237 "class loader must call VM synchronized for findClass " \ 1238 "and defineClass.") \ 1239 \ 1240 product(bool, AlwaysLockClassLoader, false, \ 1241 "Require the VM to acquire the class loader lock before calling " \ 1242 "loadClass() even for class loaders registering " \ 1243 "as parallel capable") \ 1244 \ 1245 product(bool, AllowParallelDefineClass, false, \ 1246 "Allow parallel defineClass requests for class loaders " \ 1247 "registering as parallel capable") \ 1248 \ 1249 product(bool, MustCallLoadClassInternal, false, \ 1250 "Call loadClassInternal() rather than loadClass()") \ 1251 \ 1252 product_pd(bool, DontYieldALot, \ 1253 "Throw away obvious excess yield calls") \ 1254 \ 1255 product_pd(bool, ConvertSleepToYield, \ 1256 "Convert sleep(0) to thread yield " \ 1257 "(may be off for Solaris to improve GUI)") \ 1258 \ 1259 product(bool, ConvertYieldToSleep, false, \ 1260 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1261 "behavior") \ 1262 \ 1263 develop(bool, UseDetachedThreads, true, \ 1264 "Use detached threads that are recycled upon termination " \ 1265 "(for Solaris only)") \ 1266 \ 1267 product(bool, UseLWPSynchronization, true, \ 1268 "Use LWP-based instead of libthread-based synchronization " \ 1269 "(SPARC only)") \ 1270 \ 1271 experimental(ccstr, SyncKnobs, NULL, \ 1272 "(Unstable) Various monitor synchronization tunables") \ 1273 \ 1274 experimental(intx, EmitSync, 0, \ 1275 "(Unsafe, Unstable) " \ 1276 "Control emission of inline sync fast-path code") \ 1277 \ 1278 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1279 range(0, max_jint) \ 1280 \ 1281 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1282 \ 1283 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1284 "Experimental Sync flags") \ 1285 \ 1286 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1287 \ 1288 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1289 \ 1290 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1291 \ 1292 experimental(intx, hashCode, 5, \ 1293 "(Unstable) select hashCode generation algorithm") \ 1294 \ 1295 experimental(intx, WorkAroundNPTLTimedWaitHang, 0, \ 1296 "(Unstable, Linux-specific) " \ 1297 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1298 \ 1299 product(bool, FilterSpuriousWakeups, true, \ 1300 "When true prevents OS-level spurious, or premature, wakeups " \ 1301 "from Object.wait (Ignored for Windows)") \ 1302 \ 1303 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1304 \ 1305 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1306 \ 1307 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1308 \ 1309 develop(bool, UsePthreads, false, \ 1310 "Use pthread-based instead of libthread-based synchronization " \ 1311 "(SPARC only)") \ 1312 \ 1313 product(bool, ReduceSignalUsage, false, \ 1314 "Reduce the use of OS signals in Java and/or the VM") \ 1315 \ 1316 develop_pd(bool, ShareVtableStubs, \ 1317 "Share vtable stubs (smaller code but worse branch prediction") \ 1318 \ 1319 develop(bool, LoadLineNumberTables, true, \ 1320 "Tell whether the class file parser loads line number tables") \ 1321 \ 1322 develop(bool, LoadLocalVariableTables, true, \ 1323 "Tell whether the class file parser loads local variable tables") \ 1324 \ 1325 develop(bool, LoadLocalVariableTypeTables, true, \ 1326 "Tell whether the class file parser loads local variable type" \ 1327 "tables") \ 1328 \ 1329 product(bool, AllowUserSignalHandlers, false, \ 1330 "Do not complain if the application installs signal handlers " \ 1331 "(Solaris & Linux only)") \ 1332 \ 1333 product(bool, UseSignalChaining, true, \ 1334 "Use signal-chaining to invoke signal handlers installed " \ 1335 "by the application (Solaris & Linux only)") \ 1336 \ 1337 product(bool, UseAltSigs, false, \ 1338 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1339 "internal signals (Solaris only)") \ 1340 \ 1341 product(bool, AllowJNIEnvProxy, false, \ 1342 "Allow JNIEnv proxies for jdbx") \ 1343 \ 1344 product(bool, RestoreMXCSROnJNICalls, false, \ 1345 "Restore MXCSR when returning from JNI calls") \ 1346 \ 1347 product(bool, CheckJNICalls, false, \ 1348 "Verify all arguments to JNI calls") \ 1349 \ 1350 product(bool, CheckEndorsedAndExtDirs, false, \ 1351 "Verify the endorsed and extension directories are not used") \ 1352 \ 1353 product(bool, UseFastJNIAccessors, true, \ 1354 "Use optimized versions of Get<Primitive>Field") \ 1355 \ 1356 product(intx, MaxJNILocalCapacity, 65536, \ 1357 "Maximum allowable local JNI handle capacity to " \ 1358 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1359 "where <= 0 is unlimited, default: 65536") \ 1360 range(min_intx, max_intx) \ 1361 \ 1362 product(bool, EagerXrunInit, false, \ 1363 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1364 "but not all -Xrun libraries may support the state of the VM " \ 1365 "at this time") \ 1366 \ 1367 product(bool, PreserveAllAnnotations, false, \ 1368 "Preserve RuntimeInvisibleAnnotations as well " \ 1369 "as RuntimeVisibleAnnotations") \ 1370 \ 1371 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1372 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1373 \ 1374 product(bool, UseXMMForArrayCopy, false, \ 1375 "Use SSE2 MOVQ instruction for Arraycopy") \ 1376 \ 1377 product(intx, FieldsAllocationStyle, 1, \ 1378 "0 - type based with oops first, " \ 1379 "1 - with oops last, " \ 1380 "2 - oops in super and sub classes are together") \ 1381 range(0, 2) \ 1382 \ 1383 product(bool, CompactFields, true, \ 1384 "Allocate nonstatic fields in gaps between previous fields") \ 1385 \ 1386 notproduct(bool, PrintFieldLayout, false, \ 1387 "Print field layout for each class") \ 1388 \ 1389 /* Need to limit the extent of the padding to reasonable size. */\ 1390 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1391 /* aggressive prefetching, while still leaving the room for segregating */\ 1392 /* among the distinct pages. */\ 1393 product(intx, ContendedPaddingWidth, 128, \ 1394 "How many bytes to pad the fields/classes marked @Contended with")\ 1395 range(0, 8192) \ 1396 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1397 \ 1398 product(bool, EnableContended, true, \ 1399 "Enable @Contended annotation support") \ 1400 \ 1401 product(bool, RestrictContended, true, \ 1402 "Restrict @Contended to trusted classes") \ 1403 \ 1404 product(bool, UseBiasedLocking, true, \ 1405 "Enable biased locking in JVM") \ 1406 \ 1407 product(intx, BiasedLockingStartupDelay, 4000, \ 1408 "Number of milliseconds to wait before enabling biased locking") \ 1409 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1410 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1411 \ 1412 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1413 "Print statistics of biased locking in JVM") \ 1414 \ 1415 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1416 "Threshold of number of revocations per type to try to " \ 1417 "rebias all objects in the heap of that type") \ 1418 range(0, max_intx) \ 1419 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1420 \ 1421 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1422 "Threshold of number of revocations per type to permanently " \ 1423 "revoke biases of all objects in the heap of that type") \ 1424 range(0, max_intx) \ 1425 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1426 \ 1427 product(intx, BiasedLockingDecayTime, 25000, \ 1428 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1429 "type after previous bulk rebias") \ 1430 range(500, max_intx) \ 1431 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1432 \ 1433 /* tracing */ \ 1434 \ 1435 notproduct(bool, TraceRuntimeCalls, false, \ 1436 "Trace run-time calls") \ 1437 \ 1438 develop(bool, TraceJNICalls, false, \ 1439 "Trace JNI calls") \ 1440 \ 1441 develop(bool, StressRewriter, false, \ 1442 "Stress linktime bytecode rewriting") \ 1443 \ 1444 notproduct(bool, TraceJVMCalls, false, \ 1445 "Trace JVM calls") \ 1446 \ 1447 product(ccstr, TraceJVMTI, NULL, \ 1448 "Trace flags for JVMTI functions and events") \ 1449 \ 1450 /* This option can change an EMCP method into an obsolete method. */ \ 1451 /* This can affect tests that except specific methods to be EMCP. */ \ 1452 /* This option should be used with caution. */ \ 1453 product(bool, StressLdcRewrite, false, \ 1454 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1455 \ 1456 product(uintx, TraceRedefineClasses, 0, \ 1457 "Trace level for JVMTI RedefineClasses") \ 1458 range(0, 0xFFFFFFFF) \ 1459 \ 1460 /* change to false by default sometime after Mustang */ \ 1461 product(bool, VerifyMergedCPBytecodes, true, \ 1462 "Verify bytecodes after RedefineClasses constant pool merging") \ 1463 \ 1464 develop(bool, TraceJNIHandleAllocation, false, \ 1465 "Trace allocation/deallocation of JNI handle blocks") \ 1466 \ 1467 develop(bool, TraceBytecodes, false, \ 1468 "Trace bytecode execution") \ 1469 \ 1470 develop(bool, TraceClassInitialization, false, \ 1471 "Trace class initialization") \ 1472 \ 1473 product(bool, TraceExceptions, false, \ 1474 "Trace exceptions") \ 1475 \ 1476 develop(bool, TraceICs, false, \ 1477 "Trace inline cache changes") \ 1478 \ 1479 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1480 "Trace method invocation counter overflow") \ 1481 \ 1482 develop(bool, TraceInlineCacheClearing, false, \ 1483 "Trace clearing of inline caches in nmethods") \ 1484 \ 1485 develop(bool, TraceDependencies, false, \ 1486 "Trace dependencies") \ 1487 \ 1488 develop(bool, VerifyDependencies, trueInDebug, \ 1489 "Exercise and verify the compilation dependency mechanism") \ 1490 \ 1491 develop(bool, TraceNewOopMapGeneration, false, \ 1492 "Trace OopMapGeneration") \ 1493 \ 1494 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1495 "Trace OopMapGeneration: print detailed cell states") \ 1496 \ 1497 develop(bool, TimeOopMap, false, \ 1498 "Time calls to GenerateOopMap::compute_map() in sum") \ 1499 \ 1500 develop(bool, TimeOopMap2, false, \ 1501 "Time calls to GenerateOopMap::compute_map() individually") \ 1502 \ 1503 develop(bool, TraceMonitorMismatch, false, \ 1504 "Trace monitor matching failures during OopMapGeneration") \ 1505 \ 1506 develop(bool, TraceOopMapRewrites, false, \ 1507 "Trace rewriting of method oops during oop map generation") \ 1508 \ 1509 develop(bool, TraceICBuffer, false, \ 1510 "Trace usage of IC buffer") \ 1511 \ 1512 develop(bool, TraceCompiledIC, false, \ 1513 "Trace changes of compiled IC") \ 1514 \ 1515 develop(bool, TraceStartupTime, false, \ 1516 "Trace setup time") \ 1517 \ 1518 develop(bool, TraceProtectionDomainVerification, false, \ 1519 "Trace protection domain verification") \ 1520 \ 1521 develop(bool, TraceClearedExceptions, false, \ 1522 "Print when an exception is forcibly cleared") \ 1523 \ 1524 product(bool, TraceClassResolution, false, \ 1525 "Trace all constant pool resolutions (for debugging)") \ 1526 \ 1527 product(bool, TraceBiasedLocking, false, \ 1528 "Trace biased locking in JVM") \ 1529 \ 1530 product(bool, TraceMonitorInflation, false, \ 1531 "Trace monitor inflation in JVM") \ 1532 \ 1533 /* gc */ \ 1534 \ 1535 product(bool, UseSerialGC, false, \ 1536 "Use the Serial garbage collector") \ 1537 \ 1538 product(bool, UseG1GC, false, \ 1539 "Use the Garbage-First garbage collector") \ 1540 \ 1541 product(bool, UseParallelGC, false, \ 1542 "Use the Parallel Scavenge garbage collector") \ 1543 \ 1544 product(bool, UseParallelOldGC, false, \ 1545 "Use the Parallel Old garbage collector") \ 1546 \ 1547 product(uintx, HeapMaximumCompactionInterval, 20, \ 1548 "How often should we maximally compact the heap (not allowing " \ 1549 "any dead space)") \ 1550 \ 1551 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1552 "The collection count for the first maximum compaction") \ 1553 \ 1554 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1555 "Use maximum compaction in the Parallel Old garbage collector " \ 1556 "for a system GC") \ 1557 \ 1558 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1559 "The mean used by the parallel compact dead wood " \ 1560 "limiter (a number between 0-100)") \ 1561 range(0, 100) \ 1562 \ 1563 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1564 "The standard deviation used by the parallel compact dead wood " \ 1565 "limiter (a number between 0-100)") \ 1566 range(0, 100) \ 1567 \ 1568 product(uint, ParallelGCThreads, 0, \ 1569 "Number of parallel threads parallel gc will use") \ 1570 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1571 \ 1572 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1573 "Use semaphore synchronization for the GC Threads, " \ 1574 "instead of synchronization based on mutexes") \ 1575 \ 1576 product(bool, UseDynamicNumberOfGCThreads, false, \ 1577 "Dynamically choose the number of parallel threads " \ 1578 "parallel gc will use") \ 1579 \ 1580 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1581 "Force dynamic selection of the number of " \ 1582 "parallel threads parallel gc will use to aid debugging") \ 1583 \ 1584 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1585 "Size of heap (bytes) per GC thread used in calculating the " \ 1586 "number of GC threads") \ 1587 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1588 \ 1589 product(bool, TraceDynamicGCThreads, false, \ 1590 "Trace the dynamic GC thread usage") \ 1591 \ 1592 product(uint, ConcGCThreads, 0, \ 1593 "Number of threads concurrent gc will use") \ 1594 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1595 \ 1596 product(uintx, GCTaskTimeStampEntries, 200, \ 1597 "Number of time stamp entries per gc worker thread") \ 1598 range(1, max_uintx) \ 1599 \ 1600 product(bool, AlwaysTenure, false, \ 1601 "Always tenure objects in eden (ParallelGC only)") \ 1602 \ 1603 product(bool, NeverTenure, false, \ 1604 "Never tenure objects in eden, may tenure on overflow " \ 1605 "(ParallelGC only)") \ 1606 \ 1607 product(bool, ScavengeBeforeFullGC, true, \ 1608 "Scavenge youngest generation before each full GC.") \ 1609 \ 1610 product(bool, UseConcMarkSweepGC, false, \ 1611 "Use Concurrent Mark-Sweep GC in the old generation") \ 1612 \ 1613 product(bool, ExplicitGCInvokesConcurrent, false, \ 1614 "A System.gc() request invokes a concurrent collection; " \ 1615 "(effective only when using concurrent collectors)") \ 1616 \ 1617 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1618 "A System.gc() request invokes a concurrent collection and " \ 1619 "also unloads classes during such a concurrent gc cycle " \ 1620 "(effective only when UseConcMarkSweepGC)") \ 1621 \ 1622 product(bool, GCLockerInvokesConcurrent, false, \ 1623 "The exit of a JNI critical section necessitating a scavenge, " \ 1624 "also kicks off a background concurrent collection") \ 1625 \ 1626 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1627 "How much the GC can expand the eden by while the GC locker " \ 1628 "is active (as a percentage)") \ 1629 range(0, 100) \ 1630 \ 1631 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1632 "Number of times to retry allocations when " \ 1633 "blocked by the GC locker") \ 1634 \ 1635 product(bool, UseCMSBestFit, true, \ 1636 "Use CMS best fit allocation strategy") \ 1637 \ 1638 product(bool, UseParNewGC, false, \ 1639 "Use parallel threads in the new generation") \ 1640 \ 1641 product(bool, PrintTaskqueue, false, \ 1642 "Print taskqueue statistics for parallel collectors") \ 1643 \ 1644 product(bool, PrintTerminationStats, false, \ 1645 "Print termination statistics for parallel collectors") \ 1646 \ 1647 product(uintx, ParallelGCBufferWastePct, 10, \ 1648 "Wasted fraction of parallel allocation buffer") \ 1649 range(0, 100) \ 1650 \ 1651 product(uintx, TargetPLABWastePct, 10, \ 1652 "Target wasted space in last buffer as percent of overall " \ 1653 "allocation") \ 1654 range(1, 100) \ 1655 \ 1656 product(uintx, PLABWeight, 75, \ 1657 "Percentage (0-100) used to weight the current sample when " \ 1658 "computing exponentially decaying average for ResizePLAB") \ 1659 range(0, 100) \ 1660 \ 1661 product(bool, ResizePLAB, true, \ 1662 "Dynamically resize (survivor space) promotion LAB's") \ 1663 \ 1664 product(bool, PrintPLAB, false, \ 1665 "Print (survivor space) promotion LAB's sizing decisions") \ 1666 \ 1667 product(intx, ParGCArrayScanChunk, 50, \ 1668 "Scan a subset of object array and push remainder, if array is " \ 1669 "bigger than this") \ 1670 range(1, max_intx) \ 1671 \ 1672 product(bool, ParGCUseLocalOverflow, false, \ 1673 "Instead of a global overflow list, use local overflow stacks") \ 1674 \ 1675 product(bool, ParGCTrimOverflow, true, \ 1676 "Eagerly trim the local overflow lists " \ 1677 "(when ParGCUseLocalOverflow)") \ 1678 \ 1679 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1680 "Simulate work queue overflow in ParNew") \ 1681 \ 1682 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1683 "An `interval' counter that determines how frequently " \ 1684 "we simulate overflow; a smaller number increases frequency") \ 1685 \ 1686 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1687 "The desired number of objects to claim from the overflow list") \ 1688 \ 1689 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1690 "The number of strides per worker thread that we divide up the " \ 1691 "card table scanning work into") \ 1692 range(1, max_uintx) \ 1693 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1694 \ 1695 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1696 "The number of cards in each chunk of the parallel chunks used " \ 1697 "during card table scanning") \ 1698 range(1, max_intx) \ 1699 \ 1700 product(uintx, OldPLABWeight, 50, \ 1701 "Percentage (0-100) used to weight the current sample when " \ 1702 "computing exponentially decaying average for resizing " \ 1703 "OldPLABSize") \ 1704 range(0, 100) \ 1705 \ 1706 product(bool, ResizeOldPLAB, true, \ 1707 "Dynamically resize (old gen) promotion LAB's") \ 1708 \ 1709 product(bool, PrintOldPLAB, false, \ 1710 "Print (old gen) promotion LAB's sizing decisions") \ 1711 \ 1712 product(size_t, CMSOldPLABMax, 1024, \ 1713 "Maximum size of CMS gen promotion LAB caches per worker " \ 1714 "per block size") \ 1715 range(1, max_uintx) \ 1716 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1717 \ 1718 product(size_t, CMSOldPLABMin, 16, \ 1719 "Minimum size of CMS gen promotion LAB caches per worker " \ 1720 "per block size") \ 1721 range(1, max_uintx) \ 1722 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1723 \ 1724 product(uintx, CMSOldPLABNumRefills, 4, \ 1725 "Nominal number of refills of CMS gen promotion LAB cache " \ 1726 "per worker per block size") \ 1727 range(1, max_uintx) \ 1728 \ 1729 product(bool, CMSOldPLABResizeQuicker, false, \ 1730 "React on-the-fly during a scavenge to a sudden " \ 1731 "change in block demand rate") \ 1732 \ 1733 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1734 "The tolerance of the phase-change detector for on-the-fly " \ 1735 "PLAB resizing during a scavenge") \ 1736 range(1, max_uintx) \ 1737 \ 1738 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1739 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1740 "during a scavenge") \ 1741 \ 1742 product(bool, AlwaysPreTouch, false, \ 1743 "Force all freshly committed pages to be pre-touched") \ 1744 \ 1745 product_pd(size_t, CMSYoungGenPerWorker, \ 1746 "The maximum size of young gen chosen by default per GC worker " \ 1747 "thread available") \ 1748 range(1, max_uintx) \ 1749 \ 1750 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1751 "Percentage (0-100) used to add conservatism when computing the " \ 1752 "duty cycle") \ 1753 range(0, 100) \ 1754 \ 1755 product(uintx, CMSExpAvgFactor, 50, \ 1756 "Percentage (0-100) used to weight the current sample when " \ 1757 "computing exponential averages for CMS statistics") \ 1758 range(0, 100) \ 1759 \ 1760 product(uintx, CMS_FLSWeight, 75, \ 1761 "Percentage (0-100) used to weight the current sample when " \ 1762 "computing exponentially decaying averages for CMS FLS " \ 1763 "statistics") \ 1764 range(0, 100) \ 1765 \ 1766 product(uintx, CMS_FLSPadding, 1, \ 1767 "The multiple of deviation from mean to use for buffering " \ 1768 "against volatility in free list demand") \ 1769 \ 1770 product(uintx, FLSCoalescePolicy, 2, \ 1771 "CMS: aggressiveness level for coalescing, increasing " \ 1772 "from 0 to 4") \ 1773 range(0, 4) \ 1774 \ 1775 product(bool, FLSAlwaysCoalesceLarge, false, \ 1776 "CMS: larger free blocks are always available for coalescing") \ 1777 \ 1778 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1779 "CMS: the smaller the percentage the greater the coalescing " \ 1780 "force") \ 1781 range(0.0, 1.0) \ 1782 \ 1783 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1784 "CMS: the factor by which to inflate estimated demand of small " \ 1785 "block sizes to prevent coalescing with an adjoining block") \ 1786 range(0.0, DBL_MAX) \ 1787 \ 1788 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1789 "CMS: the factor by which to inflate estimated demand of large " \ 1790 "block sizes to prevent coalescing with an adjoining block") \ 1791 range(0.0, DBL_MAX) \ 1792 \ 1793 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1794 "CMS: the factor by which to inflate estimated demand of small " \ 1795 "block sizes to prevent splitting to supply demand for smaller " \ 1796 "blocks") \ 1797 range(0.0, DBL_MAX) \ 1798 \ 1799 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1800 "CMS: the factor by which to inflate estimated demand of large " \ 1801 "block sizes to prevent splitting to supply demand for smaller " \ 1802 "blocks") \ 1803 range(0.0, DBL_MAX) \ 1804 \ 1805 product(bool, CMSExtrapolateSweep, false, \ 1806 "CMS: cushion for block demand during sweep") \ 1807 \ 1808 product(uintx, CMS_SweepWeight, 75, \ 1809 "Percentage (0-100) used to weight the current sample when " \ 1810 "computing exponentially decaying average for inter-sweep " \ 1811 "duration") \ 1812 range(0, 100) \ 1813 \ 1814 product(uintx, CMS_SweepPadding, 1, \ 1815 "The multiple of deviation from mean to use for buffering " \ 1816 "against volatility in inter-sweep duration") \ 1817 \ 1818 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1819 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1820 "duration exceeds this threshold in milliseconds") \ 1821 \ 1822 product(bool, CMSClassUnloadingEnabled, true, \ 1823 "Whether class unloading enabled when using CMS GC") \ 1824 \ 1825 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1826 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1827 "count for which classes may not be unloaded") \ 1828 \ 1829 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1830 "Replenish an indexed free list with this number of chunks") \ 1831 range(1, max_uintx) \ 1832 \ 1833 product(bool, CMSReplenishIntermediate, true, \ 1834 "Replenish all intermediate free-list caches") \ 1835 \ 1836 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1837 "When satisfying batched demand, split blocks from the " \ 1838 "IndexedFreeList whose size is a multiple of requested size") \ 1839 \ 1840 product(bool, CMSLoopWarn, false, \ 1841 "Warn in case of excessive CMS looping") \ 1842 \ 1843 /* where does the range max value of (max_jint - 1) come from? */ \ 1844 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1845 "Maximum size of marking stack") \ 1846 range(1, (max_jint - 1)) \ 1847 \ 1848 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1849 "Size of marking stack") \ 1850 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1851 \ 1852 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1853 "Simulate frequent marking stack / work queue overflow") \ 1854 \ 1855 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1856 "An \"interval\" counter that determines how frequently " \ 1857 "to simulate overflow; a smaller number increases frequency") \ 1858 \ 1859 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1860 "Maximum number of abortable preclean iterations, if > 0") \ 1861 \ 1862 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1863 "Maximum time in abortable preclean (in milliseconds)") \ 1864 range(0, max_intx) \ 1865 \ 1866 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1867 "Nominal minimum work per abortable preclean iteration") \ 1868 \ 1869 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1870 "Time that we sleep between iterations when not given " \ 1871 "enough work per iteration") \ 1872 range(0, max_intx) \ 1873 \ 1874 product(size_t, CMSRescanMultiple, 32, \ 1875 "Size (in cards) of CMS parallel rescan task") \ 1876 range(1, max_uintx) \ 1877 \ 1878 product(size_t, CMSConcMarkMultiple, 32, \ 1879 "Size (in cards) of CMS concurrent MT marking task") \ 1880 range(1, max_uintx) \ 1881 \ 1882 product(bool, CMSAbortSemantics, false, \ 1883 "Whether abort-on-overflow semantics is implemented") \ 1884 \ 1885 product(bool, CMSParallelInitialMarkEnabled, true, \ 1886 "Use the parallel initial mark.") \ 1887 \ 1888 product(bool, CMSParallelRemarkEnabled, true, \ 1889 "Whether parallel remark enabled (only if ParNewGC)") \ 1890 \ 1891 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1892 "Whether parallel remark of survivor space " \ 1893 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1894 \ 1895 product(bool, CMSPLABRecordAlways, true, \ 1896 "Always record survivor space PLAB boundaries (effective only " \ 1897 "if CMSParallelSurvivorRemarkEnabled)") \ 1898 \ 1899 product(bool, CMSEdenChunksRecordAlways, true, \ 1900 "Always record eden chunks used for the parallel initial mark " \ 1901 "or remark of eden") \ 1902 \ 1903 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1904 "Print the eden and the survivor chunks used for the parallel " \ 1905 "initial mark or remark of the eden/survivor spaces") \ 1906 \ 1907 product(bool, CMSConcurrentMTEnabled, true, \ 1908 "Whether multi-threaded concurrent work enabled " \ 1909 "(effective only if ParNewGC)") \ 1910 \ 1911 product(bool, CMSPrecleaningEnabled, true, \ 1912 "Whether concurrent precleaning enabled") \ 1913 \ 1914 product(uintx, CMSPrecleanIter, 3, \ 1915 "Maximum number of precleaning iteration passes") \ 1916 range(0, 9) \ 1917 \ 1918 product(uintx, CMSPrecleanDenominator, 3, \ 1919 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1920 "ratio") \ 1921 range(1, max_uintx) \ 1922 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1923 \ 1924 product(uintx, CMSPrecleanNumerator, 2, \ 1925 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1926 "ratio") \ 1927 range(0, max_uintx-1) \ 1928 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1929 \ 1930 product(bool, CMSPrecleanRefLists1, true, \ 1931 "Preclean ref lists during (initial) preclean phase") \ 1932 \ 1933 product(bool, CMSPrecleanRefLists2, false, \ 1934 "Preclean ref lists during abortable preclean phase") \ 1935 \ 1936 product(bool, CMSPrecleanSurvivors1, false, \ 1937 "Preclean survivors during (initial) preclean phase") \ 1938 \ 1939 product(bool, CMSPrecleanSurvivors2, true, \ 1940 "Preclean survivors during abortable preclean phase") \ 1941 \ 1942 product(uintx, CMSPrecleanThreshold, 1000, \ 1943 "Do not iterate again if number of dirty cards is less than this")\ 1944 range(100, max_uintx) \ 1945 \ 1946 product(bool, CMSCleanOnEnter, true, \ 1947 "Clean-on-enter optimization for reducing number of dirty cards") \ 1948 \ 1949 product(uintx, CMSRemarkVerifyVariant, 1, \ 1950 "Choose variant (1,2) of verification following remark") \ 1951 range(1, 2) \ 1952 \ 1953 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1954 "If Eden size is below this, do not try to schedule remark") \ 1955 \ 1956 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1957 "The Eden occupancy percentage (0-100) at which " \ 1958 "to try and schedule remark pause") \ 1959 range(0, 100) \ 1960 \ 1961 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1962 "Start sampling eden top at least before young gen " \ 1963 "occupancy reaches 1/<ratio> of the size at which " \ 1964 "we plan to schedule remark") \ 1965 range(1, max_uintx) \ 1966 \ 1967 product(uintx, CMSSamplingGrain, 16*K, \ 1968 "The minimum distance between eden samples for CMS (see above)") \ 1969 range(1, max_uintx) \ 1970 \ 1971 product(bool, CMSScavengeBeforeRemark, false, \ 1972 "Attempt scavenge before the CMS remark step") \ 1973 \ 1974 develop(bool, CMSTraceSweeper, false, \ 1975 "Trace some actions of the CMS sweeper") \ 1976 \ 1977 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1978 "Don't drain below this size per parallel worker/thief") \ 1979 range(1, max_juint) \ 1980 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1981 \ 1982 manageable(intx, CMSWaitDuration, 2000, \ 1983 "Time in milliseconds that CMS thread waits for young GC") \ 1984 \ 1985 develop(uintx, CMSCheckInterval, 1000, \ 1986 "Interval in milliseconds that CMS thread checks if it " \ 1987 "should start a collection cycle") \ 1988 \ 1989 product(bool, CMSYield, true, \ 1990 "Yield between steps of CMS") \ 1991 \ 1992 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1993 "Bitmap operations should process at most this many bits " \ 1994 "between yields") \ 1995 range(1, max_uintx) \ 1996 \ 1997 product(bool, CMSDumpAtPromotionFailure, false, \ 1998 "Dump useful information about the state of the CMS old " \ 1999 "generation upon a promotion failure") \ 2000 \ 2001 product(bool, CMSPrintChunksInDump, false, \ 2002 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 2003 "more detailed information about the free chunks") \ 2004 \ 2005 product(bool, CMSPrintObjectsInDump, false, \ 2006 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 2007 "more detailed information about the allocated objects") \ 2008 \ 2009 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 2010 "Verify that all references across the FLS boundary " \ 2011 "are to valid objects") \ 2012 \ 2013 diagnostic(bool, FLSVerifyLists, false, \ 2014 "Do lots of (expensive) FreeListSpace verification") \ 2015 \ 2016 diagnostic(bool, FLSVerifyIndexTable, false, \ 2017 "Do lots of (expensive) FLS index table verification") \ 2018 \ 2019 develop(bool, FLSVerifyDictionary, false, \ 2020 "Do lots of (expensive) FLS dictionary verification") \ 2021 \ 2022 develop(bool, VerifyBlockOffsetArray, false, \ 2023 "Do (expensive) block offset array verification") \ 2024 \ 2025 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2026 "Maintain _unallocated_block in BlockOffsetArray " \ 2027 "(currently applicable only to CMS collector)") \ 2028 \ 2029 develop(bool, TraceCMSState, false, \ 2030 "Trace the state of the CMS collection") \ 2031 \ 2032 product(intx, RefDiscoveryPolicy, 0, \ 2033 "Select type of reference discovery policy: " \ 2034 "reference-based(0) or referent-based(1)") \ 2035 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2036 ReferenceProcessor::DiscoveryPolicyMax) \ 2037 \ 2038 product(bool, ParallelRefProcEnabled, false, \ 2039 "Enable parallel reference processing whenever possible") \ 2040 \ 2041 product(bool, ParallelRefProcBalancingEnabled, true, \ 2042 "Enable balancing of reference processing queues") \ 2043 \ 2044 product(uintx, CMSTriggerRatio, 80, \ 2045 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2046 "allocated before a CMS collection cycle commences") \ 2047 range(0, 100) \ 2048 \ 2049 product(uintx, CMSBootstrapOccupancy, 50, \ 2050 "Percentage CMS generation occupancy at which to " \ 2051 "initiate CMS collection for bootstrapping collection stats") \ 2052 range(0, 100) \ 2053 \ 2054 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2055 "Percentage CMS generation occupancy to start a CMS collection " \ 2056 "cycle. A negative value means that CMSTriggerRatio is used") \ 2057 range(min_intx, 100) \ 2058 \ 2059 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2060 "Percentage of the (entire) heap occupancy to start a " \ 2061 "concurrent GC cycle. It is used by GCs that trigger a " \ 2062 "concurrent GC cycle based on the occupancy of the entire heap, " \ 2063 "not just one of the generations (e.g., G1). A value of 0 " \ 2064 "denotes 'do constant GC cycles'.") \ 2065 range(0, 100) \ 2066 \ 2067 manageable(intx, CMSTriggerInterval, -1, \ 2068 "Commence a CMS collection cycle (at least) every so many " \ 2069 "milliseconds (0 permanently, -1 disabled)") \ 2070 range(-1, max_intx) \ 2071 \ 2072 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2073 "Only use occupancy as a criterion for starting a CMS collection")\ 2074 \ 2075 product(uintx, CMSIsTooFullPercentage, 98, \ 2076 "An absolute ceiling above which CMS will always consider the " \ 2077 "unloading of classes when class unloading is enabled") \ 2078 range(0, 100) \ 2079 \ 2080 develop(bool, CMSTestInFreeList, false, \ 2081 "Check if the coalesced range is already in the " \ 2082 "free lists as claimed") \ 2083 \ 2084 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2085 "Check that all the garbage collected was returned to the " \ 2086 "free lists") \ 2087 \ 2088 notproduct(bool, ScavengeALot, false, \ 2089 "Force scavenge at every Nth exit from the runtime system " \ 2090 "(N=ScavengeALotInterval)") \ 2091 \ 2092 develop(bool, FullGCALot, false, \ 2093 "Force full gc at every Nth exit from the runtime system " \ 2094 "(N=FullGCALotInterval)") \ 2095 \ 2096 notproduct(bool, GCALotAtAllSafepoints, false, \ 2097 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2098 \ 2099 product(bool, PrintPromotionFailure, false, \ 2100 "Print additional diagnostic information following " \ 2101 "promotion failure") \ 2102 \ 2103 notproduct(bool, PromotionFailureALot, false, \ 2104 "Use promotion failure handling on every youngest generation " \ 2105 "collection") \ 2106 \ 2107 develop(uintx, PromotionFailureALotCount, 1000, \ 2108 "Number of promotion failures occurring at PLAB " \ 2109 "refill attempts (ParNew) or promotion attempts " \ 2110 "(other young collectors)") \ 2111 \ 2112 develop(uintx, PromotionFailureALotInterval, 5, \ 2113 "Total collections between promotion failures a lot") \ 2114 \ 2115 experimental(uintx, WorkStealingSleepMillis, 1, \ 2116 "Sleep time when sleep is used for yields") \ 2117 \ 2118 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2119 "Number of yields before a sleep is done during work stealing") \ 2120 \ 2121 experimental(uintx, WorkStealingHardSpins, 4096, \ 2122 "Number of iterations in a spin loop between checks on " \ 2123 "time out of hard spin") \ 2124 \ 2125 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2126 "Ratio of hard spins to calls to yield") \ 2127 \ 2128 develop(uintx, ObjArrayMarkingStride, 512, \ 2129 "Number of object array elements to push onto the marking stack " \ 2130 "before pushing a continuation entry") \ 2131 \ 2132 develop(bool, MetadataAllocationFailALot, false, \ 2133 "Fail metadata allocations at intervals controlled by " \ 2134 "MetadataAllocationFailALotInterval") \ 2135 \ 2136 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2137 "Metadata allocation failure a lot interval") \ 2138 \ 2139 develop(bool, TraceMetadataChunkAllocation, false, \ 2140 "Trace chunk metadata allocations") \ 2141 \ 2142 product(bool, TraceMetadataHumongousAllocation, false, \ 2143 "Trace humongous metadata allocations") \ 2144 \ 2145 develop(bool, TraceMetavirtualspaceAllocation, false, \ 2146 "Trace virtual space metadata allocations") \ 2147 \ 2148 notproduct(bool, ExecuteInternalVMTests, false, \ 2149 "Enable execution of internal VM tests") \ 2150 \ 2151 notproduct(bool, VerboseInternalVMTests, false, \ 2152 "Turn on logging for internal VM tests.") \ 2153 \ 2154 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2155 \ 2156 product_pd(bool, ResizeTLAB, \ 2157 "Dynamically resize TLAB size for threads") \ 2158 \ 2159 product(bool, ZeroTLAB, false, \ 2160 "Zero out the newly created TLAB") \ 2161 \ 2162 product(bool, FastTLABRefill, true, \ 2163 "Use fast TLAB refill code") \ 2164 \ 2165 product(bool, PrintTLAB, false, \ 2166 "Print various TLAB related information") \ 2167 \ 2168 product(bool, TLABStats, true, \ 2169 "Provide more detailed and expensive TLAB statistics " \ 2170 "(with PrintTLAB)") \ 2171 \ 2172 product_pd(bool, NeverActAsServerClassMachine, \ 2173 "Never act like a server-class machine") \ 2174 \ 2175 product(bool, AlwaysActAsServerClassMachine, false, \ 2176 "Always act like a server-class machine") \ 2177 \ 2178 product_pd(uint64_t, MaxRAM, \ 2179 "Real memory size (in bytes) used to set maximum heap size") \ 2180 range(0, 0XFFFFFFFFFFFFFFFF) \ 2181 \ 2182 product(size_t, ErgoHeapSizeLimit, 0, \ 2183 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2184 "MaxRAM / MaxRAMFraction") \ 2185 \ 2186 product(uintx, MaxRAMFraction, 4, \ 2187 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2188 "size") \ 2189 range(1, max_uintx) \ 2190 \ 2191 product(uintx, MinRAMFraction, 2, \ 2192 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2193 "size on systems with small physical memory size") \ 2194 range(1, max_uintx) \ 2195 \ 2196 product(uintx, InitialRAMFraction, 64, \ 2197 "Fraction (1/n) of real memory used for initial heap size") \ 2198 range(1, max_uintx) \ 2199 \ 2200 develop(uintx, MaxVirtMemFraction, 2, \ 2201 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2202 "determining maximum heap size") \ 2203 \ 2204 product(bool, UseAutoGCSelectPolicy, false, \ 2205 "Use automatic collection selection policy") \ 2206 \ 2207 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2208 "Automatic GC selection pause threshold in milliseconds") \ 2209 \ 2210 product(bool, UseAdaptiveSizePolicy, true, \ 2211 "Use adaptive generation sizing policies") \ 2212 \ 2213 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2214 "Use adaptive survivor sizing policies") \ 2215 \ 2216 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2217 "Use adaptive young-old sizing policies at minor collections") \ 2218 \ 2219 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2220 "Use adaptive young-old sizing policies at major collections") \ 2221 \ 2222 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2223 "Include statistics from System.gc() for adaptive size policy") \ 2224 \ 2225 product(bool, UseAdaptiveGCBoundary, false, \ 2226 "Allow young-old boundary to move") \ 2227 \ 2228 develop(bool, TraceAdaptiveGCBoundary, false, \ 2229 "Trace young-old boundary moves") \ 2230 \ 2231 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2232 "Resize the virtual spaces of the young or old generations") \ 2233 range(-1, 1) \ 2234 \ 2235 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2236 "Policy for changing generation size for throughput goals") \ 2237 range(0, 1) \ 2238 \ 2239 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2240 "Number of steps where heuristics is used before data is used") \ 2241 \ 2242 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2243 "Number of collections before the adaptive sizing is started") \ 2244 \ 2245 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2246 "Collection interval for printing information; zero means never") \ 2247 \ 2248 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2249 "Use adaptive minimum footprint as a goal") \ 2250 \ 2251 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2252 "Weight given to exponential resizing, between 0 and 100") \ 2253 range(0, 100) \ 2254 \ 2255 product(uintx, AdaptiveTimeWeight, 25, \ 2256 "Weight given to time in adaptive policy, between 0 and 100") \ 2257 range(0, 100) \ 2258 \ 2259 product(uintx, PausePadding, 1, \ 2260 "How much buffer to keep for pause time") \ 2261 \ 2262 product(uintx, PromotedPadding, 3, \ 2263 "How much buffer to keep for promotion failure") \ 2264 \ 2265 product(uintx, SurvivorPadding, 3, \ 2266 "How much buffer to keep for survivor overflow") \ 2267 \ 2268 product(uintx, ThresholdTolerance, 10, \ 2269 "Allowed collection cost difference between generations") \ 2270 range(0, 100) \ 2271 \ 2272 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2273 "If collection costs are within margin, reduce both by full " \ 2274 "delta") \ 2275 \ 2276 product(uintx, YoungGenerationSizeIncrement, 20, \ 2277 "Adaptive size percentage change in young generation") \ 2278 range(0, 100) \ 2279 \ 2280 product(uintx, YoungGenerationSizeSupplement, 80, \ 2281 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2282 range(0, 100) \ 2283 \ 2284 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2285 "Decay factor to YoungedGenerationSizeSupplement") \ 2286 range(1, max_uintx) \ 2287 \ 2288 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2289 "Adaptive size percentage change in tenured generation") \ 2290 range(0, 100) \ 2291 \ 2292 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2293 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2294 range(0, 100) \ 2295 \ 2296 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2297 "Decay factor to TenuredGenerationSizeIncrement") \ 2298 range(1, max_uintx) \ 2299 \ 2300 product(uintx, MaxGCPauseMillis, max_uintx, \ 2301 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2302 "or (G1 Only) the maximum GC time per MMU time slice") \ 2303 range(1, max_uintx) \ 2304 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2305 \ 2306 product(uintx, GCPauseIntervalMillis, 0, \ 2307 "Time slice for MMU specification") \ 2308 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2309 \ 2310 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2311 "Adaptive size policy maximum GC minor pause time goal " \ 2312 "in millisecond") \ 2313 \ 2314 product(uintx, GCTimeRatio, 99, \ 2315 "Adaptive size policy application time to GC time ratio") \ 2316 \ 2317 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2318 "Adaptive size scale down factor for shrinking") \ 2319 range(1, max_uintx) \ 2320 \ 2321 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2322 "Adaptive size decays the major cost for long major intervals") \ 2323 \ 2324 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2325 "Time scale over which major costs decay") \ 2326 \ 2327 product(uintx, MinSurvivorRatio, 3, \ 2328 "Minimum ratio of young generation/survivor space size") \ 2329 range(3, max_uintx) \ 2330 \ 2331 product(uintx, InitialSurvivorRatio, 8, \ 2332 "Initial ratio of young generation/survivor space size") \ 2333 \ 2334 product(size_t, BaseFootPrintEstimate, 256*M, \ 2335 "Estimate of footprint other than Java Heap") \ 2336 \ 2337 product(bool, UseGCOverheadLimit, true, \ 2338 "Use policy to limit of proportion of time spent in GC " \ 2339 "before an OutOfMemory error is thrown") \ 2340 \ 2341 product(uintx, GCTimeLimit, 98, \ 2342 "Limit of the proportion of time spent in GC before " \ 2343 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2344 range(0, 100) \ 2345 \ 2346 product(uintx, GCHeapFreeLimit, 2, \ 2347 "Minimum percentage of free space after a full GC before an " \ 2348 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2349 range(0, 100) \ 2350 \ 2351 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2352 "Number of consecutive collections before gc time limit fires") \ 2353 range(1, max_uintx) \ 2354 \ 2355 product(bool, PrintAdaptiveSizePolicy, false, \ 2356 "Print information about AdaptiveSizePolicy") \ 2357 \ 2358 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2359 "How far ahead to prefetch destination area (<= 0 means off)") \ 2360 \ 2361 product(intx, PrefetchScanIntervalInBytes, -1, \ 2362 "How far ahead to prefetch scan area (<= 0 means off)") \ 2363 \ 2364 product(intx, PrefetchFieldsAhead, -1, \ 2365 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2366 \ 2367 diagnostic(bool, VerifySilently, false, \ 2368 "Do not print the verification progress") \ 2369 \ 2370 diagnostic(bool, VerifyDuringStartup, false, \ 2371 "Verify memory system before executing any Java code " \ 2372 "during VM initialization") \ 2373 \ 2374 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2375 "Verify system before exiting") \ 2376 \ 2377 diagnostic(bool, VerifyBeforeGC, false, \ 2378 "Verify memory system before GC") \ 2379 \ 2380 diagnostic(bool, VerifyAfterGC, false, \ 2381 "Verify memory system after GC") \ 2382 \ 2383 diagnostic(bool, VerifyDuringGC, false, \ 2384 "Verify memory system during GC (between phases)") \ 2385 \ 2386 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2387 "Enable parallel memory system verification") \ 2388 \ 2389 diagnostic(bool, DeferInitialCardMark, false, \ 2390 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2391 "may arise from new_pre_store_barrier") \ 2392 \ 2393 product(bool, UseCondCardMark, false, \ 2394 "Check for already marked card before updating card table") \ 2395 \ 2396 diagnostic(bool, VerifyRememberedSets, false, \ 2397 "Verify GC remembered sets") \ 2398 \ 2399 diagnostic(bool, VerifyObjectStartArray, true, \ 2400 "Verify GC object start array if verify before/after") \ 2401 \ 2402 product(bool, DisableExplicitGC, false, \ 2403 "Ignore calls to System.gc()") \ 2404 \ 2405 notproduct(bool, CheckMemoryInitialization, false, \ 2406 "Check memory initialization") \ 2407 \ 2408 diagnostic(bool, BindCMSThreadToCPU, false, \ 2409 "Bind CMS Thread to CPU if possible") \ 2410 \ 2411 diagnostic(uintx, CPUForCMSThread, 0, \ 2412 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2413 \ 2414 product(bool, BindGCTaskThreadsToCPUs, false, \ 2415 "Bind GCTaskThreads to CPUs if possible") \ 2416 \ 2417 product(bool, UseGCTaskAffinity, false, \ 2418 "Use worker affinity when asking for GCTasks") \ 2419 \ 2420 product(uintx, ProcessDistributionStride, 4, \ 2421 "Stride through processors when distributing processes") \ 2422 \ 2423 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2424 "Number of times the coordinator GC thread will sleep while " \ 2425 "yielding before giving up and resuming GC") \ 2426 \ 2427 product(uintx, CMSYieldSleepCount, 0, \ 2428 "Number of times a GC thread (minus the coordinator) " \ 2429 "will sleep while yielding before giving up and resuming GC") \ 2430 \ 2431 /* gc tracing */ \ 2432 manageable(bool, PrintGC, false, \ 2433 "Print message at garbage collection") \ 2434 \ 2435 manageable(bool, PrintGCDetails, false, \ 2436 "Print more details at garbage collection") \ 2437 \ 2438 manageable(bool, PrintGCDateStamps, false, \ 2439 "Print date stamps at garbage collection") \ 2440 \ 2441 manageable(bool, PrintGCTimeStamps, false, \ 2442 "Print timestamps at garbage collection") \ 2443 \ 2444 manageable(bool, PrintGCID, true, \ 2445 "Print an identifier for each garbage collection") \ 2446 \ 2447 product(bool, PrintGCTaskTimeStamps, false, \ 2448 "Print timestamps for individual gc worker thread tasks") \ 2449 \ 2450 develop(intx, ConcGCYieldTimeout, 0, \ 2451 "If non-zero, assert that GC threads yield within this " \ 2452 "number of milliseconds") \ 2453 range(0, max_intx) \ 2454 \ 2455 product(bool, PrintReferenceGC, false, \ 2456 "Print times spent handling reference objects during GC " \ 2457 "(enabled only when PrintGCDetails)") \ 2458 \ 2459 develop(bool, TraceReferenceGC, false, \ 2460 "Trace handling of soft/weak/final/phantom references") \ 2461 \ 2462 develop(bool, TraceFinalizerRegistration, false, \ 2463 "Trace registration of final references") \ 2464 \ 2465 notproduct(bool, TraceScavenge, false, \ 2466 "Trace scavenge") \ 2467 \ 2468 product(bool, IgnoreEmptyClassPaths, false, \ 2469 "Ignore empty path elements in -classpath") \ 2470 \ 2471 product(bool, TraceClassPaths, false, \ 2472 "Trace processing of class paths") \ 2473 \ 2474 product_rw(bool, TraceClassLoading, false, \ 2475 "Trace all classes loaded") \ 2476 \ 2477 product(bool, TraceClassLoadingPreorder, false, \ 2478 "Trace all classes loaded in order referenced (not loaded)") \ 2479 \ 2480 product_rw(bool, TraceClassUnloading, false, \ 2481 "Trace unloading of classes") \ 2482 \ 2483 product_rw(bool, TraceLoaderConstraints, false, \ 2484 "Trace loader constraints") \ 2485 \ 2486 develop(bool, TraceClassLoaderData, false, \ 2487 "Trace class loader loader_data lifetime") \ 2488 \ 2489 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2490 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2491 "Initial size of the boot class loader data metaspace") \ 2492 range(30*K, max_uintx/BytesPerWord) \ 2493 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2494 \ 2495 product(bool, TraceYoungGenTime, false, \ 2496 "Trace accumulated time for young collection") \ 2497 \ 2498 product(bool, TraceOldGenTime, false, \ 2499 "Trace accumulated time for old collection") \ 2500 \ 2501 product(bool, PrintTenuringDistribution, false, \ 2502 "Print tenuring age information") \ 2503 \ 2504 product_rw(bool, PrintHeapAtGC, false, \ 2505 "Print heap layout before and after each GC") \ 2506 \ 2507 product_rw(bool, PrintHeapAtGCExtended, false, \ 2508 "Print extended information about the layout of the heap " \ 2509 "when -XX:+PrintHeapAtGC is set") \ 2510 \ 2511 product(bool, PrintHeapAtSIGBREAK, true, \ 2512 "Print heap layout in response to SIGBREAK") \ 2513 \ 2514 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2515 "Print a class histogram before any major stop-world GC") \ 2516 \ 2517 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2518 "Print a class histogram after any major stop-world GC") \ 2519 \ 2520 manageable(bool, PrintClassHistogram, false, \ 2521 "Print a histogram of class instances") \ 2522 \ 2523 develop(bool, TraceWorkGang, false, \ 2524 "Trace activities of work gangs") \ 2525 \ 2526 product(bool, TraceParallelOldGCTasks, false, \ 2527 "Trace multithreaded GC activity") \ 2528 \ 2529 develop(bool, TraceBlockOffsetTable, false, \ 2530 "Print BlockOffsetTable maps") \ 2531 \ 2532 develop(bool, TraceCardTableModRefBS, false, \ 2533 "Print CardTableModRefBS maps") \ 2534 \ 2535 develop(bool, TraceGCTaskManager, false, \ 2536 "Trace actions of the GC task manager") \ 2537 \ 2538 develop(bool, TraceGCTaskQueue, false, \ 2539 "Trace actions of the GC task queues") \ 2540 \ 2541 diagnostic(bool, TraceGCTaskThread, false, \ 2542 "Trace actions of the GC task threads") \ 2543 \ 2544 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2545 "Print the time taken by each phase in ParallelOldGC " \ 2546 "(PrintGCDetails must also be enabled)") \ 2547 \ 2548 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2549 "Trace marking phase in ParallelOldGC") \ 2550 \ 2551 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2552 "Trace summary phase in ParallelOldGC") \ 2553 \ 2554 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2555 "Trace compaction phase in ParallelOldGC") \ 2556 \ 2557 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2558 "Trace dense prefix computation for ParallelOldGC") \ 2559 \ 2560 develop(bool, IgnoreLibthreadGPFault, false, \ 2561 "Suppress workaround for libthread GP fault") \ 2562 \ 2563 product(bool, PrintJNIGCStalls, false, \ 2564 "Print diagnostic message when GC is stalled " \ 2565 "by JNI critical section") \ 2566 \ 2567 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2568 "The percentage of the used heap that the instances of a class " \ 2569 "must occupy for the class to generate a trace event") \ 2570 range(0.0, 100.0) \ 2571 \ 2572 /* GC log rotation setting */ \ 2573 \ 2574 product(bool, UseGCLogFileRotation, false, \ 2575 "Rotate gclog files (for long running applications). It requires "\ 2576 "-Xloggc:<filename>") \ 2577 \ 2578 product(uintx, NumberOfGCLogFiles, 0, \ 2579 "Number of gclog files in rotation " \ 2580 "(default: 0, no rotation)") \ 2581 \ 2582 product(size_t, GCLogFileSize, 8*K, \ 2583 "GC log file size, requires UseGCLogFileRotation. " \ 2584 "Set to 0 to only trigger rotation via jcmd") \ 2585 \ 2586 /* JVMTI heap profiling */ \ 2587 \ 2588 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2589 "Trace JVMTI object tagging calls") \ 2590 \ 2591 diagnostic(bool, VerifyBeforeIteration, false, \ 2592 "Verify memory system before JVMTI iteration") \ 2593 \ 2594 /* compiler interface */ \ 2595 \ 2596 develop(bool, CIPrintCompilerName, false, \ 2597 "when CIPrint is active, print the name of the active compiler") \ 2598 \ 2599 diagnostic(bool, CIPrintCompileQueue, false, \ 2600 "display the contents of the compile queue whenever a " \ 2601 "compilation is enqueued") \ 2602 \ 2603 develop(bool, CIPrintRequests, false, \ 2604 "display every request for compilation") \ 2605 \ 2606 product(bool, CITime, false, \ 2607 "collect timing information for compilation") \ 2608 \ 2609 develop(bool, CITimeVerbose, false, \ 2610 "be more verbose in compilation timings") \ 2611 \ 2612 develop(bool, CITimeEach, false, \ 2613 "display timing information after each successful compilation") \ 2614 \ 2615 develop(bool, CICountOSR, false, \ 2616 "use a separate counter when assigning ids to osr compilations") \ 2617 \ 2618 develop(bool, CICompileNatives, true, \ 2619 "compile native methods if supported by the compiler") \ 2620 \ 2621 develop_pd(bool, CICompileOSR, \ 2622 "compile on stack replacement methods if supported by the " \ 2623 "compiler") \ 2624 \ 2625 develop(bool, CIPrintMethodCodes, false, \ 2626 "print method bytecodes of the compiled code") \ 2627 \ 2628 develop(bool, CIPrintTypeFlow, false, \ 2629 "print the results of ciTypeFlow analysis") \ 2630 \ 2631 develop(bool, CITraceTypeFlow, false, \ 2632 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2633 \ 2634 develop(intx, OSROnlyBCI, -1, \ 2635 "OSR only at this bci. Negative values mean exclude that bci") \ 2636 \ 2637 /* compiler */ \ 2638 \ 2639 /* notice: the max range value here is max_jint, not max_intx */ \ 2640 /* because of overflow issue */ \ 2641 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2642 "Number of compiler threads to run") \ 2643 range(0, max_jint) \ 2644 constraint(CICompilerCountConstraintFunc, AtParse) \ 2645 \ 2646 product(intx, CompilationPolicyChoice, 0, \ 2647 "which compilation policy (0-3)") \ 2648 range(0, 3) \ 2649 \ 2650 develop(bool, UseStackBanging, true, \ 2651 "use stack banging for stack overflow checks (required for " \ 2652 "proper StackOverflow handling; disable only to measure cost " \ 2653 "of stackbanging)") \ 2654 \ 2655 develop(bool, UseStrictFP, true, \ 2656 "use strict fp if modifier strictfp is set") \ 2657 \ 2658 develop(bool, GenerateSynchronizationCode, true, \ 2659 "generate locking/unlocking code for synchronized methods and " \ 2660 "monitors") \ 2661 \ 2662 develop(bool, GenerateCompilerNullChecks, true, \ 2663 "Generate explicit null checks for loads/stores/calls") \ 2664 \ 2665 develop(bool, GenerateRangeChecks, true, \ 2666 "Generate range checks for array accesses") \ 2667 \ 2668 develop_pd(bool, ImplicitNullChecks, \ 2669 "Generate code for implicit null checks") \ 2670 \ 2671 product_pd(bool, TrapBasedNullChecks, \ 2672 "Generate code for null checks that uses a cmp and trap " \ 2673 "instruction raising SIGTRAP. This is only used if an access to" \ 2674 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2675 "ImplicitNullChecks don't work (PPC64).") \ 2676 \ 2677 product(bool, PrintSafepointStatistics, false, \ 2678 "Print statistics about safepoint synchronization") \ 2679 \ 2680 product(intx, PrintSafepointStatisticsCount, 300, \ 2681 "Total number of safepoint statistics collected " \ 2682 "before printing them out") \ 2683 range(1, max_intx) \ 2684 \ 2685 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2686 "Print safepoint statistics only when safepoint takes " \ 2687 "more than PrintSafepointSatisticsTimeout in millis") \ 2688 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2689 NOT_LP64(range(-1, max_intx)) \ 2690 \ 2691 product(bool, TraceSafepointCleanupTime, false, \ 2692 "Print the break down of clean up tasks performed during " \ 2693 "safepoint") \ 2694 \ 2695 product(bool, Inline, true, \ 2696 "Enable inlining") \ 2697 \ 2698 product(bool, ClipInlining, true, \ 2699 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2700 \ 2701 develop(bool, UseCHA, true, \ 2702 "Enable CHA") \ 2703 \ 2704 product(bool, UseTypeProfile, true, \ 2705 "Check interpreter profile for historically monomorphic calls") \ 2706 \ 2707 diagnostic(bool, PrintInlining, false, \ 2708 "Print inlining optimizations") \ 2709 \ 2710 product(bool, UsePopCountInstruction, false, \ 2711 "Use population count instruction") \ 2712 \ 2713 develop(bool, EagerInitialization, false, \ 2714 "Eagerly initialize classes if possible") \ 2715 \ 2716 diagnostic(bool, LogTouchedMethods, false, \ 2717 "Log methods which have been ever touched in runtime") \ 2718 \ 2719 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2720 "Print all methods that have been ever touched in runtime") \ 2721 \ 2722 develop(bool, TraceMethodReplacement, false, \ 2723 "Print when methods are replaced do to recompilation") \ 2724 \ 2725 develop(bool, PrintMethodFlushing, false, \ 2726 "Print the nmethods being flushed") \ 2727 \ 2728 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2729 "print statistics about method flushing") \ 2730 \ 2731 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2732 "Number of compiled code invocations after which " \ 2733 "the method is considered as hot by the flusher") \ 2734 range(1, max_jint) \ 2735 \ 2736 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2737 "Minimum number of sweeper passes before an nmethod " \ 2738 "can be flushed") \ 2739 range(0, max_intx) \ 2740 \ 2741 product(bool, UseCodeAging, true, \ 2742 "Insert counter to detect warm methods") \ 2743 \ 2744 diagnostic(bool, StressCodeAging, false, \ 2745 "Start with counters compiled in") \ 2746 \ 2747 develop(bool, UseRelocIndex, false, \ 2748 "Use an index to speed random access to relocations") \ 2749 \ 2750 develop(bool, StressCodeBuffers, false, \ 2751 "Exercise code buffer expansion and other rare state changes") \ 2752 \ 2753 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2754 "Generate extra debugging information for non-safepoints in " \ 2755 "nmethods") \ 2756 \ 2757 product(bool, PrintVMOptions, false, \ 2758 "Print flags that appeared on the command line") \ 2759 \ 2760 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2761 "Ignore unrecognized VM options") \ 2762 \ 2763 product(bool, PrintCommandLineFlags, false, \ 2764 "Print flags specified on command line or set by ergonomics") \ 2765 \ 2766 product(bool, PrintFlagsInitial, false, \ 2767 "Print all VM flags before argument processing and exit VM") \ 2768 \ 2769 product(bool, PrintFlagsFinal, false, \ 2770 "Print all VM flags after argument and ergonomic processing") \ 2771 \ 2772 notproduct(bool, PrintFlagsWithComments, false, \ 2773 "Print all VM flags with default values and descriptions and " \ 2774 "exit") \ 2775 \ 2776 product(bool, PrintFlagsRanges, false, \ 2777 "Print VM flags and their ranges and exit VM") \ 2778 \ 2779 diagnostic(bool, SerializeVMOutput, true, \ 2780 "Use a mutex to serialize output to tty and LogFile") \ 2781 \ 2782 diagnostic(bool, DisplayVMOutput, true, \ 2783 "Display all VM output on the tty, independently of LogVMOutput") \ 2784 \ 2785 diagnostic(bool, LogVMOutput, false, \ 2786 "Save VM output to LogFile") \ 2787 \ 2788 diagnostic(ccstr, LogFile, NULL, \ 2789 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2790 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2791 \ 2792 product(ccstr, ErrorFile, NULL, \ 2793 "If an error occurs, save the error data to this file " \ 2794 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2795 \ 2796 product(bool, DisplayVMOutputToStderr, false, \ 2797 "If DisplayVMOutput is true, display all VM output to stderr") \ 2798 \ 2799 product(bool, DisplayVMOutputToStdout, false, \ 2800 "If DisplayVMOutput is true, display all VM output to stdout") \ 2801 \ 2802 product(bool, UseHeavyMonitors, false, \ 2803 "use heavyweight instead of lightweight Java monitors") \ 2804 \ 2805 product(bool, PrintStringTableStatistics, false, \ 2806 "print statistics about the StringTable and SymbolTable") \ 2807 \ 2808 diagnostic(bool, VerifyStringTableAtExit, false, \ 2809 "verify StringTable contents at exit") \ 2810 \ 2811 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2812 "print histogram of the symbol table") \ 2813 \ 2814 notproduct(bool, ExitVMOnVerifyError, false, \ 2815 "standard exit from VM if bytecode verify error " \ 2816 "(only in debug mode)") \ 2817 \ 2818 diagnostic(ccstr, AbortVMOnException, NULL, \ 2819 "Call fatal if this exception is thrown. Example: " \ 2820 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2821 \ 2822 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2823 "Call fatal if the exception pointed by AbortVMOnException " \ 2824 "has this message") \ 2825 \ 2826 develop(bool, DebugVtables, false, \ 2827 "add debugging code to vtable dispatch") \ 2828 \ 2829 develop(bool, PrintVtables, false, \ 2830 "print vtables when printing klass") \ 2831 \ 2832 notproduct(bool, PrintVtableStats, false, \ 2833 "print vtables stats at end of run") \ 2834 \ 2835 develop(bool, TraceCreateZombies, false, \ 2836 "trace creation of zombie nmethods") \ 2837 \ 2838 notproduct(bool, IgnoreLockingAssertions, false, \ 2839 "disable locking assertions (for speed)") \ 2840 \ 2841 product(bool, RangeCheckElimination, true, \ 2842 "Eliminate range checks") \ 2843 \ 2844 develop_pd(bool, UncommonNullCast, \ 2845 "track occurrences of null in casts; adjust compiler tactics") \ 2846 \ 2847 develop(bool, TypeProfileCasts, true, \ 2848 "treat casts like calls for purposes of type profiling") \ 2849 \ 2850 develop(bool, DelayCompilationDuringStartup, true, \ 2851 "Delay invoking the compiler until main application class is " \ 2852 "loaded") \ 2853 \ 2854 develop(bool, CompileTheWorld, false, \ 2855 "Compile all methods in all classes in bootstrap class path " \ 2856 "(stress test)") \ 2857 \ 2858 develop(bool, CompileTheWorldPreloadClasses, true, \ 2859 "Preload all classes used by a class before start loading") \ 2860 \ 2861 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2862 "Force a safepoint every n compiles so sweeper can keep up") \ 2863 \ 2864 develop(bool, FillDelaySlots, true, \ 2865 "Fill delay slots (on SPARC only)") \ 2866 \ 2867 develop(bool, TimeLivenessAnalysis, false, \ 2868 "Time computation of bytecode liveness analysis") \ 2869 \ 2870 develop(bool, TraceLivenessGen, false, \ 2871 "Trace the generation of liveness analysis information") \ 2872 \ 2873 notproduct(bool, TraceLivenessQuery, false, \ 2874 "Trace queries of liveness analysis information") \ 2875 \ 2876 notproduct(bool, CollectIndexSetStatistics, false, \ 2877 "Collect information about IndexSets") \ 2878 \ 2879 develop(bool, UseLoopSafepoints, true, \ 2880 "Generate Safepoint nodes in every loop") \ 2881 \ 2882 develop(intx, FastAllocateSizeLimit, 128*K, \ 2883 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2884 "Inline allocations larger than this in doublewords must go slow")\ 2885 \ 2886 product(bool, AggressiveOpts, false, \ 2887 "Enable aggressive optimizations - see arguments.cpp") \ 2888 \ 2889 product_pd(uintx, TypeProfileLevel, \ 2890 "=XYZ, with Z: Type profiling of arguments at call; " \ 2891 "Y: Type profiling of return value at call; " \ 2892 "X: Type profiling of parameters to methods; " \ 2893 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2894 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2895 \ 2896 product(intx, TypeProfileArgsLimit, 2, \ 2897 "max number of call arguments to consider for type profiling") \ 2898 range(0, 16) \ 2899 \ 2900 product(intx, TypeProfileParmsLimit, 2, \ 2901 "max number of incoming parameters to consider for type profiling"\ 2902 ", -1 for all") \ 2903 range(-1, 64) \ 2904 \ 2905 /* statistics */ \ 2906 develop(bool, CountCompiledCalls, false, \ 2907 "Count method invocations") \ 2908 \ 2909 notproduct(bool, CountRuntimeCalls, false, \ 2910 "Count VM runtime calls") \ 2911 \ 2912 develop(bool, CountJNICalls, false, \ 2913 "Count jni method invocations") \ 2914 \ 2915 notproduct(bool, CountJVMCalls, false, \ 2916 "Count jvm method invocations") \ 2917 \ 2918 notproduct(bool, CountRemovableExceptions, false, \ 2919 "Count exceptions that could be replaced by branches due to " \ 2920 "inlining") \ 2921 \ 2922 notproduct(bool, ICMissHistogram, false, \ 2923 "Produce histogram of IC misses") \ 2924 \ 2925 /* interpreter */ \ 2926 develop(bool, ClearInterpreterLocals, false, \ 2927 "Always clear local variables of interpreter activations upon " \ 2928 "entry") \ 2929 \ 2930 product_pd(bool, RewriteBytecodes, \ 2931 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2932 \ 2933 product_pd(bool, RewriteFrequentPairs, \ 2934 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2935 \ 2936 diagnostic(bool, PrintInterpreter, false, \ 2937 "Print the generated interpreter code") \ 2938 \ 2939 product(bool, UseInterpreter, true, \ 2940 "Use interpreter for non-compiled methods") \ 2941 \ 2942 develop(bool, UseFastSignatureHandlers, true, \ 2943 "Use fast signature handlers for native calls") \ 2944 \ 2945 product(bool, UseLoopCounter, true, \ 2946 "Increment invocation counter on backward branch") \ 2947 \ 2948 product_pd(bool, UseOnStackReplacement, \ 2949 "Use on stack replacement, calls runtime if invoc. counter " \ 2950 "overflows in loop") \ 2951 \ 2952 notproduct(bool, TraceOnStackReplacement, false, \ 2953 "Trace on stack replacement") \ 2954 \ 2955 product_pd(bool, PreferInterpreterNativeStubs, \ 2956 "Use always interpreter stubs for native methods invoked via " \ 2957 "interpreter") \ 2958 \ 2959 develop(bool, CountBytecodes, false, \ 2960 "Count number of bytecodes executed") \ 2961 \ 2962 develop(bool, PrintBytecodeHistogram, false, \ 2963 "Print histogram of the executed bytecodes") \ 2964 \ 2965 develop(bool, PrintBytecodePairHistogram, false, \ 2966 "Print histogram of the executed bytecode pairs") \ 2967 \ 2968 diagnostic(bool, PrintSignatureHandlers, false, \ 2969 "Print code generated for native method signature handlers") \ 2970 \ 2971 develop(bool, VerifyOops, false, \ 2972 "Do plausibility checks for oops") \ 2973 \ 2974 develop(bool, CheckUnhandledOops, false, \ 2975 "Check for unhandled oops in VM code") \ 2976 \ 2977 develop(bool, VerifyJNIFields, trueInDebug, \ 2978 "Verify jfieldIDs for instance fields") \ 2979 \ 2980 notproduct(bool, VerifyJNIEnvThread, false, \ 2981 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2982 "from JNI") \ 2983 \ 2984 develop(bool, VerifyFPU, false, \ 2985 "Verify FPU state (check for NaN's, etc.)") \ 2986 \ 2987 develop(bool, VerifyThread, false, \ 2988 "Watch the thread register for corruption (SPARC only)") \ 2989 \ 2990 develop(bool, VerifyActivationFrameSize, false, \ 2991 "Verify that activation frame didn't become smaller than its " \ 2992 "minimal size") \ 2993 \ 2994 develop(bool, TraceFrequencyInlining, false, \ 2995 "Trace frequency based inlining") \ 2996 \ 2997 develop_pd(bool, InlineIntrinsics, \ 2998 "Inline intrinsics that can be statically resolved") \ 2999 \ 3000 product_pd(bool, ProfileInterpreter, \ 3001 "Profile at the bytecode level during interpretation") \ 3002 \ 3003 develop(bool, TraceProfileInterpreter, false, \ 3004 "Trace profiling at the bytecode level during interpretation. " \ 3005 "This outputs the profiling information collected to improve " \ 3006 "jit compilation.") \ 3007 \ 3008 develop_pd(bool, ProfileTraps, \ 3009 "Profile deoptimization traps at the bytecode level") \ 3010 \ 3011 product(intx, ProfileMaturityPercentage, 20, \ 3012 "number of method invocations/branches (expressed as % of " \ 3013 "CompileThreshold) before using the method's profile") \ 3014 range(0, 100) \ 3015 \ 3016 diagnostic(bool, PrintMethodData, false, \ 3017 "Print the results of +ProfileInterpreter at end of run") \ 3018 \ 3019 develop(bool, VerifyDataPointer, trueInDebug, \ 3020 "Verify the method data pointer during interpreter profiling") \ 3021 \ 3022 develop(bool, VerifyCompiledCode, false, \ 3023 "Include miscellaneous runtime verifications in nmethod code; " \ 3024 "default off because it disturbs nmethod size heuristics") \ 3025 \ 3026 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 3027 "Manually make GC thread crash then dump java stack trace; " \ 3028 "Test only") \ 3029 \ 3030 /* compilation */ \ 3031 product(bool, UseCompiler, true, \ 3032 "Use Just-In-Time compilation") \ 3033 \ 3034 develop(bool, TraceCompilationPolicy, false, \ 3035 "Trace compilation policy") \ 3036 \ 3037 develop(bool, TimeCompilationPolicy, false, \ 3038 "Time the compilation policy") \ 3039 \ 3040 product(bool, UseCounterDecay, true, \ 3041 "Adjust recompilation counters") \ 3042 \ 3043 develop(intx, CounterHalfLifeTime, 30, \ 3044 "Half-life time of invocation counters (in seconds)") \ 3045 \ 3046 develop(intx, CounterDecayMinIntervalLength, 500, \ 3047 "The minimum interval (in milliseconds) between invocation of " \ 3048 "CounterDecay") \ 3049 \ 3050 product(bool, AlwaysCompileLoopMethods, false, \ 3051 "When using recompilation, never interpret methods " \ 3052 "containing loops") \ 3053 \ 3054 product(bool, DontCompileHugeMethods, true, \ 3055 "Do not compile methods > HugeMethodLimit") \ 3056 \ 3057 /* Bytecode escape analysis estimation. */ \ 3058 product(bool, EstimateArgEscape, true, \ 3059 "Analyze bytecodes to estimate escape state of arguments") \ 3060 \ 3061 product(intx, BCEATraceLevel, 0, \ 3062 "How much tracing to do of bytecode escape analysis estimates " \ 3063 "(0-3)") \ 3064 range(0, 3) \ 3065 \ 3066 product(intx, MaxBCEAEstimateLevel, 5, \ 3067 "Maximum number of nested calls that are analyzed by BC EA") \ 3068 range(0, max_jint) \ 3069 \ 3070 product(intx, MaxBCEAEstimateSize, 150, \ 3071 "Maximum bytecode size of a method to be analyzed by BC EA") \ 3072 range(0, max_jint) \ 3073 \ 3074 product(intx, AllocatePrefetchStyle, 1, \ 3075 "0 = no prefetch, " \ 3076 "1 = prefetch instructions for each allocation, " \ 3077 "2 = use TLAB watermark to gate allocation prefetch, " \ 3078 "3 = use BIS instruction on Sparc for allocation prefetch") \ 3079 range(0, 3) \ 3080 \ 3081 product(intx, AllocatePrefetchDistance, -1, \ 3082 "Distance to prefetch ahead of allocation pointer. " \ 3083 "-1: use system-specific value (automatically determined") \ 3084 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 3085 \ 3086 product(intx, AllocatePrefetchLines, 3, \ 3087 "Number of lines to prefetch ahead of array allocation pointer") \ 3088 range(1, max_jint / 2) \ 3089 \ 3090 product(intx, AllocateInstancePrefetchLines, 1, \ 3091 "Number of lines to prefetch ahead of instance allocation " \ 3092 "pointer") \ 3093 range(1, max_jint / 2) \ 3094 \ 3095 product(intx, AllocatePrefetchStepSize, 16, \ 3096 "Step size in bytes of sequential prefetch instructions") \ 3097 range(1, max_jint) \ 3098 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 3099 \ 3100 product(intx, AllocatePrefetchInstr, 0, \ 3101 "Prefetch instruction to prefetch ahead of allocation pointer") \ 3102 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \ 3103 \ 3104 /* deoptimization */ \ 3105 develop(bool, TraceDeoptimization, false, \ 3106 "Trace deoptimization") \ 3107 \ 3108 develop(bool, PrintDeoptimizationDetails, false, \ 3109 "Print more information about deoptimization") \ 3110 \ 3111 develop(bool, DebugDeoptimization, false, \ 3112 "Tracing various information while debugging deoptimization") \ 3113 \ 3114 product(intx, SelfDestructTimer, 0, \ 3115 "Will cause VM to terminate after a given time (in minutes) " \ 3116 "(0 means off)") \ 3117 range(0, max_intx) \ 3118 \ 3119 product(intx, MaxJavaStackTraceDepth, 1024, \ 3120 "The maximum number of lines in the stack trace for Java " \ 3121 "exceptions (0 means all)") \ 3122 range(0, max_jint/2) \ 3123 \ 3124 /* notice: the max range value here is max_jint, not max_intx */ \ 3125 /* because of overflow issue */ \ 3126 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3127 "Guarantee a safepoint (at least) every so many milliseconds " \ 3128 "(0 means none)")) \ 3129 NOT_EMBEDDED(range(0, max_jint)) \ 3130 \ 3131 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3132 "Guarantee a safepoint (at least) every so many milliseconds " \ 3133 "(0 means none)")) \ 3134 EMBEDDED_ONLY(range(0, max_jint)) \ 3135 \ 3136 product(intx, SafepointTimeoutDelay, 10000, \ 3137 "Delay in milliseconds for option SafepointTimeout") \ 3138 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 3139 NOT_LP64(range(0, max_intx)) \ 3140 \ 3141 product(intx, NmethodSweepActivity, 10, \ 3142 "Removes cold nmethods from code cache if > 0. Higher values " \ 3143 "result in more aggressive sweeping") \ 3144 range(0, 2000) \ 3145 \ 3146 notproduct(bool, LogSweeper, false, \ 3147 "Keep a ring buffer of sweeper activity") \ 3148 \ 3149 notproduct(intx, SweeperLogEntries, 1024, \ 3150 "Number of records in the ring buffer of sweeper activity") \ 3151 \ 3152 notproduct(intx, MemProfilingInterval, 500, \ 3153 "Time between each invocation of the MemProfiler") \ 3154 \ 3155 develop(intx, MallocCatchPtr, -1, \ 3156 "Hit breakpoint when mallocing/freeing this pointer") \ 3157 \ 3158 notproduct(ccstrlist, SuppressErrorAt, "", \ 3159 "List of assertions (file:line) to muzzle") \ 3160 \ 3161 notproduct(size_t, HandleAllocationLimit, 1024, \ 3162 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3163 "is used") \ 3164 \ 3165 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3166 "Threshold for total handle allocation when " \ 3167 "+TraceHandleAllocation is used") \ 3168 \ 3169 develop(intx, StackPrintLimit, 100, \ 3170 "number of stack frames to print in VM-level stack dump") \ 3171 \ 3172 notproduct(intx, MaxElementPrintSize, 256, \ 3173 "maximum number of elements to print") \ 3174 \ 3175 notproduct(intx, MaxSubklassPrintSize, 4, \ 3176 "maximum number of subklasses to print when printing klass") \ 3177 \ 3178 product(intx, MaxInlineLevel, 9, \ 3179 "maximum number of nested calls that are inlined") \ 3180 range(0, max_jint) \ 3181 \ 3182 product(intx, MaxRecursiveInlineLevel, 1, \ 3183 "maximum number of nested recursive calls that are inlined") \ 3184 range(0, max_jint) \ 3185 \ 3186 develop(intx, MaxForceInlineLevel, 100, \ 3187 "maximum number of nested calls that are forced for inlining " \ 3188 "(using CompileCommand or marked w/ @ForceInline)") \ 3189 range(0, max_jint) \ 3190 \ 3191 product_pd(intx, InlineSmallCode, \ 3192 "Only inline already compiled methods if their code size is " \ 3193 "less than this") \ 3194 range(0, max_jint) \ 3195 \ 3196 product(intx, MaxInlineSize, 35, \ 3197 "The maximum bytecode size of a method to be inlined") \ 3198 range(0, max_jint) \ 3199 \ 3200 product_pd(intx, FreqInlineSize, \ 3201 "The maximum bytecode size of a frequent method to be inlined") \ 3202 range(0, max_jint) \ 3203 \ 3204 product(intx, MaxTrivialSize, 6, \ 3205 "The maximum bytecode size of a trivial method to be inlined") \ 3206 range(0, max_jint) \ 3207 \ 3208 product(intx, MinInliningThreshold, 250, \ 3209 "The minimum invocation count a method needs to have to be " \ 3210 "inlined") \ 3211 range(0, max_jint) \ 3212 \ 3213 develop(intx, MethodHistogramCutoff, 100, \ 3214 "The cutoff value for method invocation histogram (+CountCalls)") \ 3215 \ 3216 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3217 "Number of interpreted methods to show in profile") \ 3218 \ 3219 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3220 "Number of compiled methods to show in profile") \ 3221 \ 3222 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3223 "Number of stub methods to show in profile") \ 3224 \ 3225 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3226 "Number of runtime stub nodes to show in profile") \ 3227 \ 3228 product(intx, ProfileIntervalsTicks, 100, \ 3229 "Number of ticks between printing of interval profile " \ 3230 "(+ProfileIntervals)") \ 3231 range(0, max_intx) \ 3232 \ 3233 notproduct(intx, ScavengeALotInterval, 1, \ 3234 "Interval between which scavenge will occur with +ScavengeALot") \ 3235 \ 3236 notproduct(intx, FullGCALotInterval, 1, \ 3237 "Interval between which full gc will occur with +FullGCALot") \ 3238 \ 3239 notproduct(intx, FullGCALotStart, 0, \ 3240 "For which invocation to start FullGCAlot") \ 3241 \ 3242 notproduct(intx, FullGCALotDummies, 32*K, \ 3243 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3244 "to move") \ 3245 \ 3246 develop(intx, DontYieldALotInterval, 10, \ 3247 "Interval between which yields will be dropped (milliseconds)") \ 3248 \ 3249 develop(intx, MinSleepInterval, 1, \ 3250 "Minimum sleep() interval (milliseconds) when " \ 3251 "ConvertSleepToYield is off (used for Solaris)") \ 3252 \ 3253 develop(intx, ProfilerPCTickThreshold, 15, \ 3254 "Number of ticks in a PC buckets to be a hotspot") \ 3255 \ 3256 notproduct(intx, DeoptimizeALotInterval, 5, \ 3257 "Number of exits until DeoptimizeALot kicks in") \ 3258 \ 3259 notproduct(intx, ZombieALotInterval, 5, \ 3260 "Number of exits until ZombieALot kicks in") \ 3261 \ 3262 diagnostic(intx, MallocVerifyInterval, 0, \ 3263 "If non-zero, verify C heap after every N calls to " \ 3264 "malloc/realloc/free") \ 3265 range(0, max_intx) \ 3266 \ 3267 diagnostic(intx, MallocVerifyStart, 0, \ 3268 "If non-zero, start verifying C heap after Nth call to " \ 3269 "malloc/realloc/free") \ 3270 range(0, max_intx) \ 3271 \ 3272 diagnostic(uintx, MallocMaxTestWords, 0, \ 3273 "If non-zero, maximum number of words that malloc/realloc can " \ 3274 "allocate (for testing only)") \ 3275 range(0, max_uintx) \ 3276 \ 3277 product(intx, TypeProfileWidth, 2, \ 3278 "Number of receiver types to record in call/cast profile") \ 3279 range(0, 8) \ 3280 \ 3281 experimental(intx, MethodProfileWidth, 0, \ 3282 "Number of methods to record in call profile") \ 3283 \ 3284 develop(intx, BciProfileWidth, 2, \ 3285 "Number of return bci's to record in ret profile") \ 3286 \ 3287 product(intx, PerMethodRecompilationCutoff, 400, \ 3288 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3289 range(-1, max_intx) \ 3290 \ 3291 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3292 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3293 range(-1, max_intx) \ 3294 \ 3295 product(intx, PerMethodTrapLimit, 100, \ 3296 "Limit on traps (of one kind) in a method (includes inlines)") \ 3297 range(0, max_jint) \ 3298 \ 3299 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3300 "Limit on speculative traps (of one kind) in a method " \ 3301 "(includes inlines)") \ 3302 range(0, max_jint) \ 3303 \ 3304 product(intx, PerBytecodeTrapLimit, 4, \ 3305 "Limit on traps (of one kind) at a particular BCI") \ 3306 range(0, max_jint) \ 3307 \ 3308 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3309 "Extra method data trap entries for speculation") \ 3310 \ 3311 develop(intx, InlineFrequencyRatio, 20, \ 3312 "Ratio of call site execution to caller method invocation") \ 3313 range(0, max_jint) \ 3314 \ 3315 develop_pd(intx, InlineFrequencyCount, \ 3316 "Count of call site execution necessary to trigger frequent " \ 3317 "inlining") \ 3318 range(0, max_jint) \ 3319 \ 3320 develop(intx, InlineThrowCount, 50, \ 3321 "Force inlining of interpreted methods that throw this often") \ 3322 range(0, max_jint) \ 3323 \ 3324 develop(intx, InlineThrowMaxSize, 200, \ 3325 "Force inlining of throwing methods smaller than this") \ 3326 range(0, max_jint) \ 3327 \ 3328 develop(intx, ProfilerNodeSize, 1024, \ 3329 "Size in K to allocate for the Profile Nodes of each thread") \ 3330 range(0, 1024) \ 3331 \ 3332 /* gc parameters */ \ 3333 product(size_t, InitialHeapSize, 0, \ 3334 "Initial heap size (in bytes); zero means use ergonomics") \ 3335 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3336 \ 3337 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3338 "Maximum heap size (in bytes)") \ 3339 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3340 \ 3341 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3342 "Initial tenured generation size (in bytes)") \ 3343 \ 3344 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3345 "Initial new generation size (in bytes)") \ 3346 constraint(NewSizeConstraintFunc,AfterErgo) \ 3347 \ 3348 product(size_t, MaxNewSize, max_uintx, \ 3349 "Maximum new generation size (in bytes), max_uintx means set " \ 3350 "ergonomically") \ 3351 \ 3352 product(size_t, PretenureSizeThreshold, 0, \ 3353 "Maximum size in bytes of objects allocated in DefNew " \ 3354 "generation; zero means no maximum") \ 3355 \ 3356 product(size_t, MinTLABSize, 2*K, \ 3357 "Minimum allowed TLAB size (in bytes)") \ 3358 range(1, max_uintx) \ 3359 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3360 \ 3361 product(size_t, TLABSize, 0, \ 3362 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3363 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3364 \ 3365 product(size_t, YoungPLABSize, 4096, \ 3366 "Size of young gen promotion LAB's (in HeapWords)") \ 3367 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3368 \ 3369 product(size_t, OldPLABSize, 1024, \ 3370 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3371 "of blocks to attempt to claim when refilling CMS LAB's") \ 3372 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3373 \ 3374 product(uintx, TLABAllocationWeight, 35, \ 3375 "Allocation averaging weight") \ 3376 range(0, 100) \ 3377 \ 3378 /* Limit the lower bound of this flag to 1 as it is used */ \ 3379 /* in a division expression. */ \ 3380 product(uintx, TLABWasteTargetPercent, 1, \ 3381 "Percentage of Eden that can be wasted") \ 3382 range(1, 100) \ 3383 \ 3384 product(uintx, TLABRefillWasteFraction, 64, \ 3385 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3386 range(1, max_uintx) \ 3387 \ 3388 product(uintx, TLABWasteIncrement, 4, \ 3389 "Increment allowed waste at slow allocation") \ 3390 \ 3391 product(uintx, SurvivorRatio, 8, \ 3392 "Ratio of eden/survivor space size") \ 3393 range(1, max_uintx-2) \ 3394 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3395 \ 3396 product(uintx, NewRatio, 2, \ 3397 "Ratio of old/new generation sizes") \ 3398 range(0, max_uintx-1) \ 3399 \ 3400 product_pd(size_t, NewSizeThreadIncrease, \ 3401 "Additional size added to desired new generation size per " \ 3402 "non-daemon thread (in bytes)") \ 3403 \ 3404 product_pd(size_t, MetaspaceSize, \ 3405 "Initial size of Metaspaces (in bytes)") \ 3406 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3407 \ 3408 product(size_t, MaxMetaspaceSize, max_uintx, \ 3409 "Maximum size of Metaspaces (in bytes)") \ 3410 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3411 \ 3412 product(size_t, CompressedClassSpaceSize, 1*G, \ 3413 "Maximum size of class area in Metaspace when compressed " \ 3414 "class pointers are used") \ 3415 range(1*M, 3*G) \ 3416 \ 3417 manageable(uintx, MinHeapFreeRatio, 40, \ 3418 "The minimum percentage of heap free after GC to avoid expansion."\ 3419 " For most GCs this applies to the old generation. In G1 and" \ 3420 " ParallelGC it applies to the whole heap.") \ 3421 range(0, 100) \ 3422 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3423 \ 3424 manageable(uintx, MaxHeapFreeRatio, 70, \ 3425 "The maximum percentage of heap free after GC to avoid shrinking."\ 3426 " For most GCs this applies to the old generation. In G1 and" \ 3427 " ParallelGC it applies to the whole heap.") \ 3428 range(0, 100) \ 3429 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3430 \ 3431 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3432 "Number of milliseconds per MB of free space in the heap") \ 3433 range(0, max_intx) \ 3434 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3435 \ 3436 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3437 "The minimum change in heap space due to GC (in bytes)") \ 3438 \ 3439 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3440 "The minimum expansion of Metaspace (in bytes)") \ 3441 \ 3442 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3443 "The maximum percentage of Metaspace free after GC to avoid " \ 3444 "shrinking") \ 3445 range(0, 100) \ 3446 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3447 \ 3448 product(uintx, MinMetaspaceFreeRatio, 40, \ 3449 "The minimum percentage of Metaspace free after GC to avoid " \ 3450 "expansion") \ 3451 range(0, 99) \ 3452 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3453 \ 3454 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3455 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3456 \ 3457 product(uintx, QueuedAllocationWarningCount, 0, \ 3458 "Number of times an allocation that queues behind a GC " \ 3459 "will retry before printing a warning") \ 3460 \ 3461 diagnostic(uintx, VerifyGCStartAt, 0, \ 3462 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3463 \ 3464 diagnostic(intx, VerifyGCLevel, 0, \ 3465 "Generation level at which to start +VerifyBefore/AfterGC") \ 3466 range(0, 1) \ 3467 \ 3468 product(uintx, MaxTenuringThreshold, 15, \ 3469 "Maximum value for tenuring threshold") \ 3470 range(0, markOopDesc::max_age + 1) \ 3471 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3472 \ 3473 product(uintx, InitialTenuringThreshold, 7, \ 3474 "Initial value for tenuring threshold") \ 3475 range(0, markOopDesc::max_age + 1) \ 3476 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3477 \ 3478 product(uintx, TargetSurvivorRatio, 50, \ 3479 "Desired percentage of survivor space used after scavenge") \ 3480 range(0, 100) \ 3481 \ 3482 product(uintx, MarkSweepDeadRatio, 5, \ 3483 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3484 "Serial mark sweep treats this as both the minimum and maximum " \ 3485 "value. " \ 3486 "CMS uses this value only if it falls back to mark sweep. " \ 3487 "Par compact uses a variable scale based on the density of the " \ 3488 "generation and treats this as the maximum value when the heap " \ 3489 "is either completely full or completely empty. Par compact " \ 3490 "also has a smaller default value; see arguments.cpp.") \ 3491 range(0, 100) \ 3492 \ 3493 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3494 "How often should we fully compact the heap (ignoring the dead " \ 3495 "space parameters)") \ 3496 range(1, max_uintx) \ 3497 \ 3498 product(intx, PrintCMSStatistics, 0, \ 3499 "Statistics for CMS") \ 3500 \ 3501 product(bool, PrintCMSInitiationStatistics, false, \ 3502 "Statistics for initiating a CMS collection") \ 3503 \ 3504 product(intx, PrintFLSStatistics, 0, \ 3505 "Statistics for CMS' FreeListSpace") \ 3506 \ 3507 product(intx, PrintFLSCensus, 0, \ 3508 "Census for CMS' FreeListSpace") \ 3509 \ 3510 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3511 "Delay between expansion and allocation (in milliseconds)") \ 3512 \ 3513 develop(uintx, GCWorkerDelayMillis, 0, \ 3514 "Delay in scheduling GC workers (in milliseconds)") \ 3515 \ 3516 product(intx, DeferThrSuspendLoopCount, 4000, \ 3517 "(Unstable) Number of times to iterate in safepoint loop " \ 3518 "before blocking VM threads ") \ 3519 range(-1, max_jint-1) \ 3520 \ 3521 product(intx, DeferPollingPageLoopCount, -1, \ 3522 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3523 "before changing safepoint polling page to RO ") \ 3524 range(-1, max_jint-1) \ 3525 \ 3526 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3527 range(0, max_intx) \ 3528 \ 3529 product(bool, PSChunkLargeArrays, true, \ 3530 "Process large arrays in chunks") \ 3531 \ 3532 product(uintx, GCDrainStackTargetSize, 64, \ 3533 "Number of entries we will try to leave on the stack " \ 3534 "during parallel gc") \ 3535 \ 3536 /* stack parameters */ \ 3537 product_pd(intx, StackYellowPages, \ 3538 "Number of yellow zone (recoverable overflows) pages") \ 3539 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3540 \ 3541 product_pd(intx, StackRedPages, \ 3542 "Number of red zone (unrecoverable overflows) pages") \ 3543 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3544 \ 3545 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3546 product_pd(intx, StackShadowPages, \ 3547 "Number of shadow zone (for overflow checking) pages " \ 3548 "this should exceed the depth of the VM and native call stack") \ 3549 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3550 \ 3551 product_pd(intx, ThreadStackSize, \ 3552 "Thread Stack Size (in Kbytes)") \ 3553 range(0, max_intx-os::vm_page_size()) \ 3554 \ 3555 product_pd(intx, VMThreadStackSize, \ 3556 "Non-Java Thread Stack Size (in Kbytes)") \ 3557 range(0, max_intx/(1 * K)) \ 3558 \ 3559 product_pd(intx, CompilerThreadStackSize, \ 3560 "Compiler Thread Stack Size (in Kbytes)") \ 3561 range(0, max_intx) \ 3562 \ 3563 develop_pd(size_t, JVMInvokeMethodSlack, \ 3564 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3565 \ 3566 /* code cache parameters */ \ 3567 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3568 develop(uintx, CodeCacheSegmentSize, \ 3569 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3570 "Code cache segment size (in bytes) - smallest unit of " \ 3571 "allocation") \ 3572 range(1, 1024) \ 3573 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3574 \ 3575 develop_pd(intx, CodeEntryAlignment, \ 3576 "Code entry alignment for generated code (in bytes)") \ 3577 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3578 \ 3579 product_pd(intx, OptoLoopAlignment, \ 3580 "Align inner loops to zero relative to this modulus") \ 3581 range(1, 16) \ 3582 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3583 \ 3584 product_pd(uintx, InitialCodeCacheSize, \ 3585 "Initial code cache size (in bytes)") \ 3586 range(0, max_uintx) \ 3587 \ 3588 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3589 "Minimum code cache size (in bytes) required to start VM.") \ 3590 range(0, max_uintx) \ 3591 \ 3592 product(bool, SegmentedCodeCache, false, \ 3593 "Use a segmented code cache") \ 3594 \ 3595 product_pd(uintx, ReservedCodeCacheSize, \ 3596 "Reserved code cache size (in bytes) - maximum code cache size") \ 3597 range(0, max_uintx) \ 3598 \ 3599 product_pd(uintx, NonProfiledCodeHeapSize, \ 3600 "Size of code heap with non-profiled methods (in bytes)") \ 3601 range(0, max_uintx) \ 3602 \ 3603 product_pd(uintx, ProfiledCodeHeapSize, \ 3604 "Size of code heap with profiled methods (in bytes)") \ 3605 range(0, max_uintx) \ 3606 \ 3607 product_pd(uintx, NonNMethodCodeHeapSize, \ 3608 "Size of code heap with non-nmethods (in bytes)") \ 3609 range(0, max_uintx) \ 3610 \ 3611 product_pd(uintx, CodeCacheExpansionSize, \ 3612 "Code cache expansion size (in bytes)") \ 3613 range(0, max_uintx) \ 3614 \ 3615 develop_pd(uintx, CodeCacheMinBlockLength, \ 3616 "Minimum number of segments in a code cache block") \ 3617 range(1, 100) \ 3618 \ 3619 notproduct(bool, ExitOnFullCodeCache, false, \ 3620 "Exit the VM if we fill the code cache") \ 3621 \ 3622 product(bool, UseCodeCacheFlushing, true, \ 3623 "Remove cold/old nmethods from the code cache") \ 3624 \ 3625 product(uintx, StartAggressiveSweepingAt, 10, \ 3626 "Start aggressive sweeping if X[%] of the code cache is free." \ 3627 "Segmented code cache: X[%] of the non-profiled heap." \ 3628 "Non-segmented code cache: X[%] of the total code cache") \ 3629 range(0, 100) \ 3630 \ 3631 /* interpreter debugging */ \ 3632 develop(intx, BinarySwitchThreshold, 5, \ 3633 "Minimal number of lookupswitch entries for rewriting to binary " \ 3634 "switch") \ 3635 \ 3636 develop(intx, StopInterpreterAt, 0, \ 3637 "Stop interpreter execution at specified bytecode number") \ 3638 \ 3639 develop(intx, TraceBytecodesAt, 0, \ 3640 "Trace bytecodes starting with specified bytecode number") \ 3641 \ 3642 /* compiler interface */ \ 3643 develop(intx, CIStart, 0, \ 3644 "The id of the first compilation to permit") \ 3645 \ 3646 develop(intx, CIStop, max_jint, \ 3647 "The id of the last compilation to permit") \ 3648 \ 3649 develop(intx, CIStartOSR, 0, \ 3650 "The id of the first osr compilation to permit " \ 3651 "(CICountOSR must be on)") \ 3652 \ 3653 develop(intx, CIStopOSR, max_jint, \ 3654 "The id of the last osr compilation to permit " \ 3655 "(CICountOSR must be on)") \ 3656 \ 3657 develop(intx, CIBreakAtOSR, -1, \ 3658 "The id of osr compilation to break at") \ 3659 \ 3660 develop(intx, CIBreakAt, -1, \ 3661 "The id of compilation to break at") \ 3662 \ 3663 product(ccstrlist, CompileOnly, "", \ 3664 "List of methods (pkg/class.name) to restrict compilation to") \ 3665 \ 3666 product(ccstr, CompileCommandFile, NULL, \ 3667 "Read compiler commands from this file [.hotspot_compiler]") \ 3668 \ 3669 product(ccstrlist, CompileCommand, "", \ 3670 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3671 \ 3672 develop(bool, ReplayCompiles, false, \ 3673 "Enable replay of compilations from ReplayDataFile") \ 3674 \ 3675 product(ccstr, ReplayDataFile, NULL, \ 3676 "File containing compilation replay information" \ 3677 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3678 \ 3679 product(ccstr, InlineDataFile, NULL, \ 3680 "File containing inlining replay information" \ 3681 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3682 \ 3683 develop(intx, ReplaySuppressInitializers, 2, \ 3684 "Control handling of class initialization during replay: " \ 3685 "0 - don't do anything special; " \ 3686 "1 - treat all class initializers as empty; " \ 3687 "2 - treat class initializers for application classes as empty; " \ 3688 "3 - allow all class initializers to run during bootstrap but " \ 3689 " pretend they are empty after starting replay") \ 3690 range(0, 3) \ 3691 \ 3692 develop(bool, ReplayIgnoreInitErrors, false, \ 3693 "Ignore exceptions thrown during initialization for replay") \ 3694 \ 3695 product(bool, DumpReplayDataOnError, true, \ 3696 "Record replay data for crashing compiler threads") \ 3697 \ 3698 product(bool, CICompilerCountPerCPU, false, \ 3699 "1 compiler thread for log(N CPUs)") \ 3700 \ 3701 develop(intx, CIFireOOMAt, -1, \ 3702 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3703 "(non-negative value throws OOM after this many CI accesses " \ 3704 "in each compile)") \ 3705 notproduct(intx, CICrashAt, -1, \ 3706 "id of compilation to trigger assert in compiler thread for " \ 3707 "the purpose of testing, e.g. generation of replay data") \ 3708 notproduct(bool, CIObjectFactoryVerify, false, \ 3709 "enable potentially expensive verification in ciObjectFactory") \ 3710 \ 3711 /* Priorities */ \ 3712 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3713 \ 3714 product(intx, ThreadPriorityPolicy, 0, \ 3715 "0 : Normal. "\ 3716 " VM chooses priorities that are appropriate for normal "\ 3717 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3718 " to normal native priority. Java priorities below " \ 3719 " NORM_PRIORITY map to lower native priority values. On "\ 3720 " Windows applications are allowed to use higher native "\ 3721 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3722 " not use the highest possible native priority, "\ 3723 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3724 " system threads. On Linux thread priorities are ignored "\ 3725 " because the OS does not support static priority in "\ 3726 " SCHED_OTHER scheduling class which is the only choice for "\ 3727 " non-root, non-realtime applications. "\ 3728 "1 : Aggressive. "\ 3729 " Java thread priorities map over to the entire range of "\ 3730 " native thread priorities. Higher Java thread priorities map "\ 3731 " to higher native thread priorities. This policy should be "\ 3732 " used with care, as sometimes it can cause performance "\ 3733 " degradation in the application and/or the entire system. On "\ 3734 " Linux this policy requires root privilege.") \ 3735 range(0, 1) \ 3736 \ 3737 product(bool, ThreadPriorityVerbose, false, \ 3738 "Print priority changes") \ 3739 \ 3740 product(intx, CompilerThreadPriority, -1, \ 3741 "The native priority at which compiler threads should run " \ 3742 "(-1 means no change)") \ 3743 range(min_jint, max_jint) \ 3744 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3745 \ 3746 product(intx, VMThreadPriority, -1, \ 3747 "The native priority at which the VM thread should run " \ 3748 "(-1 means no change)") \ 3749 range(-1, 127) \ 3750 \ 3751 product(bool, CompilerThreadHintNoPreempt, true, \ 3752 "(Solaris only) Give compiler threads an extra quanta") \ 3753 \ 3754 product(bool, VMThreadHintNoPreempt, false, \ 3755 "(Solaris only) Give VM thread an extra quanta") \ 3756 \ 3757 product(intx, JavaPriority1_To_OSPriority, -1, \ 3758 "Map Java priorities to OS priorities") \ 3759 range(-1, 127) \ 3760 \ 3761 product(intx, JavaPriority2_To_OSPriority, -1, \ 3762 "Map Java priorities to OS priorities") \ 3763 range(-1, 127) \ 3764 \ 3765 product(intx, JavaPriority3_To_OSPriority, -1, \ 3766 "Map Java priorities to OS priorities") \ 3767 range(-1, 127) \ 3768 \ 3769 product(intx, JavaPriority4_To_OSPriority, -1, \ 3770 "Map Java priorities to OS priorities") \ 3771 range(-1, 127) \ 3772 \ 3773 product(intx, JavaPriority5_To_OSPriority, -1, \ 3774 "Map Java priorities to OS priorities") \ 3775 range(-1, 127) \ 3776 \ 3777 product(intx, JavaPriority6_To_OSPriority, -1, \ 3778 "Map Java priorities to OS priorities") \ 3779 range(-1, 127) \ 3780 \ 3781 product(intx, JavaPriority7_To_OSPriority, -1, \ 3782 "Map Java priorities to OS priorities") \ 3783 range(-1, 127) \ 3784 \ 3785 product(intx, JavaPriority8_To_OSPriority, -1, \ 3786 "Map Java priorities to OS priorities") \ 3787 range(-1, 127) \ 3788 \ 3789 product(intx, JavaPriority9_To_OSPriority, -1, \ 3790 "Map Java priorities to OS priorities") \ 3791 range(-1, 127) \ 3792 \ 3793 product(intx, JavaPriority10_To_OSPriority,-1, \ 3794 "Map Java priorities to OS priorities") \ 3795 range(-1, 127) \ 3796 \ 3797 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3798 "Java thread priority 10 maps to critical scheduling priority") \ 3799 \ 3800 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3801 "Compiler thread(s) run at critical scheduling priority") \ 3802 \ 3803 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3804 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3805 \ 3806 /* compiler debugging */ \ 3807 notproduct(intx, CompileTheWorldStartAt, 1, \ 3808 "First class to consider when using +CompileTheWorld") \ 3809 \ 3810 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3811 "Last class to consider when using +CompileTheWorld") \ 3812 \ 3813 develop(intx, NewCodeParameter, 0, \ 3814 "Testing Only: Create a dedicated integer parameter before " \ 3815 "putback") \ 3816 \ 3817 /* new oopmap storage allocation */ \ 3818 develop(intx, MinOopMapAllocation, 8, \ 3819 "Minimum number of OopMap entries in an OopMapSet") \ 3820 \ 3821 /* Background Compilation */ \ 3822 develop(intx, LongCompileThreshold, 50, \ 3823 "Used with +TraceLongCompiles") \ 3824 \ 3825 /* recompilation */ \ 3826 product_pd(intx, CompileThreshold, \ 3827 "number of interpreted method invocations before (re-)compiling") \ 3828 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3829 \ 3830 product(double, CompileThresholdScaling, 1.0, \ 3831 "Factor to control when first compilation happens " \ 3832 "(both with and without tiered compilation): " \ 3833 "values greater than 1.0 delay counter overflow, " \ 3834 "values between 0 and 1.0 rush counter overflow, " \ 3835 "value of 1.0 leaves compilation thresholds unchanged " \ 3836 "value of 0.0 is equivalent to -Xint. " \ 3837 "" \ 3838 "Flag can be set as per-method option. " \ 3839 "If a value is specified for a method, compilation thresholds " \ 3840 "for that method are scaled by both the value of the global flag "\ 3841 "and the value of the per-method flag.") \ 3842 range(0.0, DBL_MAX) \ 3843 \ 3844 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3845 "Interpreter (tier 0) invocation notification frequency") \ 3846 range(0, 30) \ 3847 \ 3848 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3849 "C1 without MDO (tier 2) invocation notification frequency") \ 3850 range(0, 30) \ 3851 \ 3852 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3853 "C1 with MDO profiling (tier 3) invocation notification " \ 3854 "frequency") \ 3855 range(0, 30) \ 3856 \ 3857 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3858 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3859 range(0, 30) \ 3860 \ 3861 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3862 "Interpreter (tier 0) invocation notification frequency") \ 3863 range(0, 30) \ 3864 \ 3865 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3866 "C1 without MDO (tier 2) invocation notification frequency") \ 3867 range(0, 30) \ 3868 \ 3869 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3870 "C1 with MDO profiling (tier 3) invocation notification " \ 3871 "frequency") \ 3872 range(0, 30) \ 3873 \ 3874 product(intx, Tier2CompileThreshold, 0, \ 3875 "threshold at which tier 2 compilation is invoked") \ 3876 range(0, max_jint) \ 3877 \ 3878 product(intx, Tier2BackEdgeThreshold, 0, \ 3879 "Back edge threshold at which tier 2 compilation is invoked") \ 3880 range(0, max_jint) \ 3881 \ 3882 product(intx, Tier3InvocationThreshold, 200, \ 3883 "Compile if number of method invocations crosses this " \ 3884 "threshold") \ 3885 range(0, max_jint) \ 3886 \ 3887 product(intx, Tier3MinInvocationThreshold, 100, \ 3888 "Minimum invocation to compile at tier 3") \ 3889 range(0, max_jint) \ 3890 \ 3891 product(intx, Tier3CompileThreshold, 2000, \ 3892 "Threshold at which tier 3 compilation is invoked (invocation " \ 3893 "minimum must be satisfied)") \ 3894 range(0, max_jint) \ 3895 \ 3896 product(intx, Tier3BackEdgeThreshold, 60000, \ 3897 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3898 range(0, max_jint) \ 3899 \ 3900 product(intx, Tier4InvocationThreshold, 5000, \ 3901 "Compile if number of method invocations crosses this " \ 3902 "threshold") \ 3903 range(0, max_jint) \ 3904 \ 3905 product(intx, Tier4MinInvocationThreshold, 600, \ 3906 "Minimum invocation to compile at tier 4") \ 3907 range(0, max_jint) \ 3908 \ 3909 product(intx, Tier4CompileThreshold, 15000, \ 3910 "Threshold at which tier 4 compilation is invoked (invocation " \ 3911 "minimum must be satisfied") \ 3912 range(0, max_jint) \ 3913 \ 3914 product(intx, Tier4BackEdgeThreshold, 40000, \ 3915 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3916 range(0, max_jint) \ 3917 \ 3918 product(intx, Tier3DelayOn, 5, \ 3919 "If C2 queue size grows over this amount per compiler thread " \ 3920 "stop compiling at tier 3 and start compiling at tier 2") \ 3921 range(0, max_jint) \ 3922 \ 3923 product(intx, Tier3DelayOff, 2, \ 3924 "If C2 queue size is less than this amount per compiler thread " \ 3925 "allow methods compiled at tier 2 transition to tier 3") \ 3926 range(0, max_jint) \ 3927 \ 3928 product(intx, Tier3LoadFeedback, 5, \ 3929 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3930 "reaches this amount per compiler thread") \ 3931 range(0, max_jint) \ 3932 \ 3933 product(intx, Tier4LoadFeedback, 3, \ 3934 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3935 "reaches this amount per compiler thread") \ 3936 range(0, max_jint) \ 3937 \ 3938 product(intx, TieredCompileTaskTimeout, 50, \ 3939 "Kill compile task if method was not used within " \ 3940 "given timeout in milliseconds") \ 3941 range(0, max_intx) \ 3942 \ 3943 product(intx, TieredStopAtLevel, 4, \ 3944 "Stop at given compilation level") \ 3945 range(0, 4) \ 3946 \ 3947 product(intx, Tier0ProfilingStartPercentage, 200, \ 3948 "Start profiling in interpreter if the counters exceed tier 3 " \ 3949 "thresholds by the specified percentage") \ 3950 range(0, max_jint) \ 3951 \ 3952 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3953 "Increase the compile threshold for C1 compilation if the code " \ 3954 "cache is filled by the specified percentage") \ 3955 range(0, 99) \ 3956 \ 3957 product(intx, TieredRateUpdateMinTime, 1, \ 3958 "Minimum rate sampling interval (in milliseconds)") \ 3959 range(0, max_intx) \ 3960 \ 3961 product(intx, TieredRateUpdateMaxTime, 25, \ 3962 "Maximum rate sampling interval (in milliseconds)") \ 3963 range(0, max_intx) \ 3964 \ 3965 product_pd(bool, TieredCompilation, \ 3966 "Enable tiered compilation") \ 3967 \ 3968 product(bool, PrintTieredEvents, false, \ 3969 "Print tiered events notifications") \ 3970 \ 3971 product_pd(intx, OnStackReplacePercentage, \ 3972 "NON_TIERED number of method invocations/branches (expressed as " \ 3973 "% of CompileThreshold) before (re-)compiling OSR code") \ 3974 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3975 \ 3976 product(intx, InterpreterProfilePercentage, 33, \ 3977 "NON_TIERED number of method invocations/branches (expressed as " \ 3978 "% of CompileThreshold) before profiling in the interpreter") \ 3979 range(0, 100) \ 3980 \ 3981 develop(intx, MaxRecompilationSearchLength, 10, \ 3982 "The maximum number of frames to inspect when searching for " \ 3983 "recompilee") \ 3984 \ 3985 develop(intx, MaxInterpretedSearchLength, 3, \ 3986 "The maximum number of interpreted frames to skip when searching "\ 3987 "for recompilee") \ 3988 \ 3989 develop(intx, DesiredMethodLimit, 8000, \ 3990 "The desired maximum method size (in bytecodes) after inlining") \ 3991 \ 3992 develop(intx, HugeMethodLimit, 8000, \ 3993 "Don't compile methods larger than this if " \ 3994 "+DontCompileHugeMethods") \ 3995 \ 3996 /* New JDK 1.4 reflection implementation */ \ 3997 \ 3998 develop(intx, FastSuperclassLimit, 8, \ 3999 "Depth of hardwired instanceof accelerator array") \ 4000 \ 4001 /* Properties for Java libraries */ \ 4002 \ 4003 product(size_t, MaxDirectMemorySize, 0, \ 4004 "Maximum total size of NIO direct-buffer allocations") \ 4005 range(0, (size_t)SIZE_MAX) \ 4006 \ 4007 /* Flags used for temporary code during development */ \ 4008 \ 4009 diagnostic(bool, UseNewCode, false, \ 4010 "Testing Only: Use the new version while testing") \ 4011 \ 4012 diagnostic(bool, UseNewCode2, false, \ 4013 "Testing Only: Use the new version while testing") \ 4014 \ 4015 diagnostic(bool, UseNewCode3, false, \ 4016 "Testing Only: Use the new version while testing") \ 4017 \ 4018 /* flags for performance data collection */ \ 4019 \ 4020 product(bool, UsePerfData, falseInEmbedded, \ 4021 "Flag to disable jvmstat instrumentation for performance testing "\ 4022 "and problem isolation purposes") \ 4023 \ 4024 product(bool, PerfDataSaveToFile, false, \ 4025 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 4026 \ 4027 product(ccstr, PerfDataSaveFile, NULL, \ 4028 "Save PerfData memory to the specified absolute pathname. " \ 4029 "The string %p in the file name (if present) " \ 4030 "will be replaced by pid") \ 4031 \ 4032 product(intx, PerfDataSamplingInterval, 50, \ 4033 "Data sampling interval (in milliseconds)") \ 4034 range(PeriodicTask::min_interval, max_jint) \ 4035 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 4036 \ 4037 develop(bool, PerfTraceDataCreation, false, \ 4038 "Trace creation of Performance Data Entries") \ 4039 \ 4040 develop(bool, PerfTraceMemOps, false, \ 4041 "Trace PerfMemory create/attach/detach calls") \ 4042 \ 4043 product(bool, PerfDisableSharedMem, false, \ 4044 "Store performance data in standard memory") \ 4045 \ 4046 product(intx, PerfDataMemorySize, 64*K, \ 4047 "Size of performance data memory region. Will be rounded " \ 4048 "up to a multiple of the native os page size.") \ 4049 range(128, 32*64*K) \ 4050 \ 4051 product(intx, PerfMaxStringConstLength, 1024, \ 4052 "Maximum PerfStringConstant string length before truncation") \ 4053 range(32, 32*K) \ 4054 \ 4055 product(bool, PerfAllowAtExitRegistration, false, \ 4056 "Allow registration of atexit() methods") \ 4057 \ 4058 product(bool, PerfBypassFileSystemCheck, false, \ 4059 "Bypass Win32 file system criteria checks (Windows Only)") \ 4060 \ 4061 product(intx, UnguardOnExecutionViolation, 0, \ 4062 "Unguard page and retry on no-execute fault (Win32 only) " \ 4063 "0=off, 1=conservative, 2=aggressive") \ 4064 range(0, 2) \ 4065 \ 4066 /* Serviceability Support */ \ 4067 \ 4068 product(bool, ManagementServer, false, \ 4069 "Create JMX Management Server") \ 4070 \ 4071 product(bool, DisableAttachMechanism, false, \ 4072 "Disable mechanism that allows tools to attach to this VM") \ 4073 \ 4074 product(bool, StartAttachListener, false, \ 4075 "Always start Attach Listener at VM startup") \ 4076 \ 4077 manageable(bool, PrintConcurrentLocks, false, \ 4078 "Print java.util.concurrent locks in thread dump") \ 4079 \ 4080 product(bool, TransmitErrorReport, false, \ 4081 "Enable error report transmission on erroneous termination") \ 4082 \ 4083 product(ccstr, ErrorReportServer, NULL, \ 4084 "Override built-in error report server address") \ 4085 \ 4086 /* Shared spaces */ \ 4087 \ 4088 product(bool, UseSharedSpaces, true, \ 4089 "Use shared spaces for metadata") \ 4090 \ 4091 product(bool, VerifySharedSpaces, false, \ 4092 "Verify shared spaces (false for default archive, true for " \ 4093 "archive specified by -XX:SharedArchiveFile)") \ 4094 \ 4095 product(bool, RequireSharedSpaces, false, \ 4096 "Require shared spaces for metadata") \ 4097 \ 4098 product(bool, DumpSharedSpaces, false, \ 4099 "Special mode: JVM reads a class list, loads classes, builds " \ 4100 "shared spaces, and dumps the shared spaces to a file to be " \ 4101 "used in future JVM runs") \ 4102 \ 4103 product(bool, PrintSharedSpaces, false, \ 4104 "Print usage of shared spaces") \ 4105 \ 4106 product(bool, PrintSharedArchiveAndExit, false, \ 4107 "Print shared archive file contents") \ 4108 \ 4109 product(bool, PrintSharedDictionary, false, \ 4110 "If PrintSharedArchiveAndExit is true, also print the shared " \ 4111 "dictionary") \ 4112 \ 4113 product(size_t, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 4114 "Size of read-write space for metadata (in bytes)") \ 4115 \ 4116 product(size_t, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 4117 "Size of read-only space for metadata (in bytes)") \ 4118 \ 4119 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 4120 "Size of the shared miscellaneous data area (in bytes)") \ 4121 \ 4122 product(uintx, SharedMiscCodeSize, 120*K, \ 4123 "Size of the shared miscellaneous code area (in bytes)") \ 4124 \ 4125 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 4126 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4127 "Address to allocate shared memory region for class data") \ 4128 \ 4129 product(uintx, SharedSymbolTableBucketSize, 4, \ 4130 "Average number of symbols per bucket in shared table") \ 4131 range(2, 246) \ 4132 \ 4133 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4134 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4135 "classes. Just exclude them from the shared dictionary.") \ 4136 \ 4137 diagnostic(bool, PrintMethodHandleStubs, false, \ 4138 "Print generated stub code for method handles") \ 4139 \ 4140 develop(bool, TraceMethodHandles, false, \ 4141 "trace internal method handle operations") \ 4142 \ 4143 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4144 "perform extra checks when constructing method handles") \ 4145 \ 4146 diagnostic(bool, ShowHiddenFrames, false, \ 4147 "show method handle implementation frames (usually hidden)") \ 4148 \ 4149 experimental(bool, TrustFinalNonStaticFields, false, \ 4150 "trust final non-static declarations for constant folding") \ 4151 \ 4152 diagnostic(bool, FoldStableValues, true, \ 4153 "Optimize loads from stable fields (marked w/ @Stable)") \ 4154 \ 4155 develop(bool, TraceInvokeDynamic, false, \ 4156 "trace internal invoke dynamic operations") \ 4157 \ 4158 diagnostic(bool, PauseAtStartup, false, \ 4159 "Causes the VM to pause at startup time and wait for the pause " \ 4160 "file to be removed (default: ./vm.paused.<pid>)") \ 4161 \ 4162 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4163 "The file to create and for whose removal to await when pausing " \ 4164 "at startup. (default: ./vm.paused.<pid>)") \ 4165 \ 4166 diagnostic(bool, PauseAtExit, false, \ 4167 "Pause and wait for keypress on exit if a debugger is attached") \ 4168 \ 4169 product(bool, ExtendedDTraceProbes, false, \ 4170 "Enable performance-impacting dtrace probes") \ 4171 \ 4172 product(bool, DTraceMethodProbes, false, \ 4173 "Enable dtrace probes for method-entry and method-exit") \ 4174 \ 4175 product(bool, DTraceAllocProbes, false, \ 4176 "Enable dtrace probes for object allocation") \ 4177 \ 4178 product(bool, DTraceMonitorProbes, false, \ 4179 "Enable dtrace probes for monitor events") \ 4180 \ 4181 product(bool, RelaxAccessControlCheck, false, \ 4182 "Relax the access control checks in the verifier") \ 4183 \ 4184 product(uintx, StringTableSize, defaultStringTableSize, \ 4185 "Number of buckets in the interned String table") \ 4186 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4187 \ 4188 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4189 "Number of buckets in the JVM internal Symbol table") \ 4190 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4191 \ 4192 product(bool, UseStringDeduplication, false, \ 4193 "Use string deduplication") \ 4194 \ 4195 product(bool, PrintStringDeduplicationStatistics, false, \ 4196 "Print string deduplication statistics") \ 4197 \ 4198 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4199 "A string must reach this age (or be promoted to an old region) " \ 4200 "to be considered for deduplication") \ 4201 range(1, markOopDesc::max_age) \ 4202 \ 4203 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4204 "Force table resize every time the table is scanned") \ 4205 \ 4206 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4207 "Force table rehash every time the table is scanned") \ 4208 \ 4209 diagnostic(bool, WhiteBoxAPI, false, \ 4210 "Enable internal testing APIs") \ 4211 \ 4212 product(bool, PrintGCCause, true, \ 4213 "Include GC cause in GC logging") \ 4214 \ 4215 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4216 "Default survivor space alignment in bytes") \ 4217 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4218 \ 4219 product(bool , AllowNonVirtualCalls, false, \ 4220 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4221 \ 4222 product(ccstr, DumpLoadedClassList, NULL, \ 4223 "Dump the names all loaded classes, that could be stored into " \ 4224 "the CDS archive, in the specified file") \ 4225 \ 4226 product(ccstr, SharedClassListFile, NULL, \ 4227 "Override the default CDS class list") \ 4228 \ 4229 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4230 "Override the default location of the CDS archive file") \ 4231 \ 4232 product(ccstr, ExtraSharedClassListFile, NULL, \ 4233 "Extra classlist for building the CDS archive file") \ 4234 \ 4235 experimental(size_t, ArrayAllocatorMallocLimit, \ 4236 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4237 "Allocation less than this value will be allocated " \ 4238 "using malloc. Larger allocations will use mmap.") \ 4239 \ 4240 experimental(bool, AlwaysAtomicAccesses, false, \ 4241 "Accesses to all variables should always be atomic") \ 4242 \ 4243 product(bool, EnableTracing, false, \ 4244 "Enable event-based tracing") \ 4245 \ 4246 product(bool, UseLockedTracing, false, \ 4247 "Use locked-tracing when doing event-based tracing") \ 4248 \ 4249 diagnostic(bool, UseUnalignedAccesses, false, \ 4250 "Use unaligned memory accesses in Unsafe") \ 4251 \ 4252 product_pd(bool, PreserveFramePointer, \ 4253 "Use the FP register for holding the frame pointer " \ 4254 "and not as a general purpose register.") \ 4255 \ 4256 diagnostic(bool, CheckIntrinsics, true, \ 4257 "When a class C is loaded, check that " \ 4258 "(1) all intrinsics defined by the VM for class C are present "\ 4259 "in the loaded class file and are marked with the " \ 4260 "@HotSpotIntrinsicCandidate annotation, that " \ 4261 "(2) there is an intrinsic registered for all loaded methods " \ 4262 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4263 "annotation, and that " \ 4264 "(3) no orphan methods exist for class C (i.e., methods for " \ 4265 "which the VM declares an intrinsic but that are not declared "\ 4266 "in the loaded class C. " \ 4267 "Check (3) is available only in debug builds.") 4268 4269/* 4270 * Macros for factoring of globals 4271 */ 4272 4273// Interface macros 4274#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4275#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4276#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4277#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4278#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4279#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4280#ifdef PRODUCT 4281#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value; 4282#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name; 4283#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name; 4284#else 4285#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4286#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4287#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4288#endif // PRODUCT 4289// Special LP64 flags, product only needed for now. 4290#ifdef _LP64 4291#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4292#else 4293#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4294#endif // _LP64 4295 4296// Implementation macros 4297#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4298#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4299#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4300#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4301#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4302#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4303#ifdef PRODUCT 4304#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value; 4305#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name; 4306#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value; 4307#else 4308#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4309#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4310#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4311#endif // PRODUCT 4312#ifdef _LP64 4313#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4314#else 4315#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4316#endif // _LP64 4317 4318// Only materialize src code for range checking when required, ignore otherwise 4319#define IGNORE_RANGE(a, b) 4320// Only materialize src code for contraint checking when required, ignore otherwise 4321#define IGNORE_CONSTRAINT(func,type) 4322 4323RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4324 DECLARE_PD_DEVELOPER_FLAG, \ 4325 DECLARE_PRODUCT_FLAG, \ 4326 DECLARE_PD_PRODUCT_FLAG, \ 4327 DECLARE_DIAGNOSTIC_FLAG, \ 4328 DECLARE_EXPERIMENTAL_FLAG, \ 4329 DECLARE_NOTPRODUCT_FLAG, \ 4330 DECLARE_MANAGEABLE_FLAG, \ 4331 DECLARE_PRODUCT_RW_FLAG, \ 4332 DECLARE_LP64_PRODUCT_FLAG, \ 4333 IGNORE_RANGE, \ 4334 IGNORE_CONSTRAINT) 4335 4336RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4337 DECLARE_PD_DEVELOPER_FLAG, \ 4338 DECLARE_PRODUCT_FLAG, \ 4339 DECLARE_PD_PRODUCT_FLAG, \ 4340 DECLARE_DIAGNOSTIC_FLAG, \ 4341 DECLARE_NOTPRODUCT_FLAG, \ 4342 IGNORE_RANGE, \ 4343 IGNORE_CONSTRAINT) 4344 4345ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4346 DECLARE_PRODUCT_FLAG, \ 4347 DECLARE_DIAGNOSTIC_FLAG, \ 4348 DECLARE_EXPERIMENTAL_FLAG, \ 4349 DECLARE_NOTPRODUCT_FLAG, \ 4350 IGNORE_RANGE, \ 4351 IGNORE_CONSTRAINT) 4352 4353// Extensions 4354 4355#include "runtime/globals_ext.hpp" 4356 4357#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4358