globals.hpp revision 9095:5459f44b1a75
189857Sobrien/* 289857Sobrien * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 389857Sobrien * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 489857Sobrien * 589857Sobrien * This code is free software; you can redistribute it and/or modify it 689857Sobrien * under the terms of the GNU General Public License version 2 only, as 789857Sobrien * published by the Free Software Foundation. 889857Sobrien * 989857Sobrien * This code is distributed in the hope that it will be useful, but WITHOUT 1089857Sobrien * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1189857Sobrien * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1289857Sobrien * version 2 for more details (a copy is included in the LICENSE file that 1389857Sobrien * accompanied this code). 1489857Sobrien * 1589857Sobrien * You should have received a copy of the GNU General Public License version 1689857Sobrien * 2 along with this work; if not, write to the Free Software Foundation, 1789857Sobrien * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1889857Sobrien * 1989857Sobrien * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2089857Sobrien * or visit www.oracle.com if you need additional information or have any 2189857Sobrien * questions. 2289857Sobrien * 2389857Sobrien */ 2489857Sobrien 2589857Sobrien#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 2689857Sobrien#define SHARE_VM_RUNTIME_GLOBALS_HPP 2789857Sobrien 2889857Sobrien#include "utilities/debug.hpp" 2989857Sobrien#include <float.h> // for DBL_MAX 3089857Sobrien 3189857Sobrien// use this for flags that are true per default in the tiered build 3289857Sobrien// but false in non-tiered builds, and vice versa 3389857Sobrien#ifdef TIERED 3489857Sobrien#define trueInTiered true 3589857Sobrien#define falseInTiered false 3689857Sobrien#else 3789857Sobrien#define trueInTiered false 3889857Sobrien#define falseInTiered true 3989857Sobrien#endif 4089857Sobrien 4189857Sobrien#ifdef TARGET_ARCH_x86 4289857Sobrien# include "globals_x86.hpp" 4389857Sobrien#endif 4489857Sobrien#ifdef TARGET_ARCH_sparc 4589857Sobrien# include "globals_sparc.hpp" 4689857Sobrien#endif 4789857Sobrien#ifdef TARGET_ARCH_zero 4889857Sobrien# include "globals_zero.hpp" 4989857Sobrien#endif 5089857Sobrien#ifdef TARGET_ARCH_arm 5189857Sobrien# include "globals_arm.hpp" 5289857Sobrien#endif 5389857Sobrien#ifdef TARGET_ARCH_ppc 5489857Sobrien# include "globals_ppc.hpp" 5589857Sobrien#endif 5689857Sobrien#ifdef TARGET_ARCH_aarch64 5789857Sobrien# include "globals_aarch64.hpp" 5889857Sobrien#endif 5989857Sobrien#ifdef TARGET_OS_FAMILY_linux 6089857Sobrien# include "globals_linux.hpp" 6189857Sobrien#endif 6289857Sobrien#ifdef TARGET_OS_FAMILY_solaris 6389857Sobrien# include "globals_solaris.hpp" 6489857Sobrien#endif 6589857Sobrien#ifdef TARGET_OS_FAMILY_windows 6689857Sobrien# include "globals_windows.hpp" 6789857Sobrien#endif 6889857Sobrien#ifdef TARGET_OS_FAMILY_aix 69130561Sobrien# include "globals_aix.hpp" 7089857Sobrien#endif 7189857Sobrien#ifdef TARGET_OS_FAMILY_bsd 7289857Sobrien# include "globals_bsd.hpp" 7389857Sobrien#endif 7489857Sobrien#ifdef TARGET_OS_ARCH_linux_x86 7589857Sobrien# include "globals_linux_x86.hpp" 7689857Sobrien#endif 7789857Sobrien#ifdef TARGET_OS_ARCH_linux_sparc 7889857Sobrien# include "globals_linux_sparc.hpp" 7989857Sobrien#endif 8089857Sobrien#ifdef TARGET_OS_ARCH_linux_zero 8189857Sobrien# include "globals_linux_zero.hpp" 8289857Sobrien#endif 8389857Sobrien#ifdef TARGET_OS_ARCH_solaris_x86 8489857Sobrien# include "globals_solaris_x86.hpp" 8589857Sobrien#endif 8689857Sobrien#ifdef TARGET_OS_ARCH_solaris_sparc 8789857Sobrien# include "globals_solaris_sparc.hpp" 8889857Sobrien#endif 8989857Sobrien#ifdef TARGET_OS_ARCH_windows_x86 9089857Sobrien# include "globals_windows_x86.hpp" 9189857Sobrien#endif 9289857Sobrien#ifdef TARGET_OS_ARCH_linux_arm 9389857Sobrien# include "globals_linux_arm.hpp" 9489857Sobrien#endif 9589857Sobrien#ifdef TARGET_OS_ARCH_linux_ppc 9689857Sobrien# include "globals_linux_ppc.hpp" 9789857Sobrien#endif 9889857Sobrien#ifdef TARGET_OS_ARCH_linux_aarch64 9989857Sobrien# include "globals_linux_aarch64.hpp" 10089857Sobrien#endif 10189857Sobrien#ifdef TARGET_OS_ARCH_aix_ppc 10289857Sobrien# include "globals_aix_ppc.hpp" 10389857Sobrien#endif 10489857Sobrien#ifdef TARGET_OS_ARCH_bsd_x86 10589857Sobrien# include "globals_bsd_x86.hpp" 10689857Sobrien#endif 10789857Sobrien#ifdef TARGET_OS_ARCH_bsd_zero 10889857Sobrien# include "globals_bsd_zero.hpp" 10989857Sobrien#endif 11089857Sobrien#ifdef COMPILER1 11189857Sobrien#ifdef TARGET_ARCH_x86 11289857Sobrien# include "c1_globals_x86.hpp" 11389857Sobrien#endif 11489857Sobrien#ifdef TARGET_ARCH_sparc 11589857Sobrien# include "c1_globals_sparc.hpp" 11689857Sobrien#endif 11789857Sobrien#ifdef TARGET_ARCH_arm 11889857Sobrien# include "c1_globals_arm.hpp" 11989857Sobrien#endif 12089857Sobrien#ifdef TARGET_ARCH_aarch64 12189857Sobrien# include "c1_globals_aarch64.hpp" 12289857Sobrien#endif 12389857Sobrien#ifdef TARGET_OS_FAMILY_linux 12489857Sobrien# include "c1_globals_linux.hpp" 12589857Sobrien#endif 12689857Sobrien#ifdef TARGET_OS_FAMILY_solaris 12789857Sobrien# include "c1_globals_solaris.hpp" 12889857Sobrien#endif 12989857Sobrien#ifdef TARGET_OS_FAMILY_windows 13089857Sobrien# include "c1_globals_windows.hpp" 13189857Sobrien#endif 13289857Sobrien#ifdef TARGET_OS_FAMILY_aix 13389857Sobrien# include "c1_globals_aix.hpp" 13489857Sobrien#endif 13589857Sobrien#ifdef TARGET_OS_FAMILY_bsd 13689857Sobrien# include "c1_globals_bsd.hpp" 13789857Sobrien#endif 13889857Sobrien#ifdef TARGET_ARCH_ppc 13989857Sobrien# include "c1_globals_ppc.hpp" 14089857Sobrien#endif 14189857Sobrien#endif 14289857Sobrien#ifdef COMPILER2 14389857Sobrien#ifdef TARGET_ARCH_x86 14489857Sobrien# include "c2_globals_x86.hpp" 14589857Sobrien#endif 14689857Sobrien#ifdef TARGET_ARCH_sparc 14789857Sobrien# include "c2_globals_sparc.hpp" 14889857Sobrien#endif 14989857Sobrien#ifdef TARGET_ARCH_arm 15089857Sobrien# include "c2_globals_arm.hpp" 15189857Sobrien#endif 15289857Sobrien#ifdef TARGET_ARCH_ppc 15389857Sobrien# include "c2_globals_ppc.hpp" 15489857Sobrien#endif 15589857Sobrien#ifdef TARGET_ARCH_aarch64 15689857Sobrien# include "c2_globals_aarch64.hpp" 15789857Sobrien#endif 15889857Sobrien#ifdef TARGET_OS_FAMILY_linux 15989857Sobrien# include "c2_globals_linux.hpp" 16089857Sobrien#endif 16189857Sobrien#ifdef TARGET_OS_FAMILY_solaris 16289857Sobrien# include "c2_globals_solaris.hpp" 16389857Sobrien#endif 16489857Sobrien#ifdef TARGET_OS_FAMILY_windows 16589857Sobrien# include "c2_globals_windows.hpp" 16689857Sobrien#endif 16789857Sobrien#ifdef TARGET_OS_FAMILY_aix 16889857Sobrien# include "c2_globals_aix.hpp" 16989857Sobrien#endif 17089857Sobrien#ifdef TARGET_OS_FAMILY_bsd 17189857Sobrien# include "c2_globals_bsd.hpp" 17289857Sobrien#endif 17389857Sobrien#endif 17489857Sobrien#ifdef SHARK 17589857Sobrien#ifdef TARGET_ARCH_zero 17689857Sobrien# include "shark_globals_zero.hpp" 17789857Sobrien#endif 17889857Sobrien#endif 17989857Sobrien 18089857Sobrien#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 18189857Sobriendefine_pd_global(bool, BackgroundCompilation, false); 18289857Sobriendefine_pd_global(bool, UseTLAB, false); 18389857Sobriendefine_pd_global(bool, CICompileOSR, false); 18489857Sobriendefine_pd_global(bool, UseTypeProfile, false); 18589857Sobriendefine_pd_global(bool, UseOnStackReplacement, false); 18689857Sobriendefine_pd_global(bool, InlineIntrinsics, false); 18789857Sobriendefine_pd_global(bool, PreferInterpreterNativeStubs, true); 18889857Sobriendefine_pd_global(bool, ProfileInterpreter, false); 18989857Sobriendefine_pd_global(bool, ProfileTraps, false); 19089857Sobriendefine_pd_global(bool, TieredCompilation, false); 19189857Sobrien 19289857Sobriendefine_pd_global(intx, CompileThreshold, 0); 19389857Sobrien 19489857Sobriendefine_pd_global(intx, OnStackReplacePercentage, 0); 19589857Sobriendefine_pd_global(bool, ResizeTLAB, false); 19689857Sobriendefine_pd_global(intx, FreqInlineSize, 0); 19789857Sobriendefine_pd_global(size_t, NewSizeThreadIncrease, 4*K); 19889857Sobriendefine_pd_global(intx, InlineClassNatives, true); 19989857Sobriendefine_pd_global(intx, InlineUnsafeOps, true); 20089857Sobriendefine_pd_global(intx, InitialCodeCacheSize, 160*K); 20189857Sobriendefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 20289857Sobriendefine_pd_global(intx, NonProfiledCodeHeapSize, 0); 20389857Sobriendefine_pd_global(intx, ProfiledCodeHeapSize, 0); 20489857Sobriendefine_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 20589857Sobrien 20689857Sobriendefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 20789857Sobriendefine_pd_global(intx, CodeCacheMinBlockLength, 1); 20889857Sobriendefine_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 20989857Sobriendefine_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 21089857Sobriendefine_pd_global(bool, NeverActAsServerClassMachine, true); 21189857Sobriendefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 21289857Sobrien#define CI_COMPILER_COUNT 0 21389857Sobrien#else 21489857Sobrien 21589857Sobrien#ifdef COMPILER2 21689857Sobrien#define CI_COMPILER_COUNT 2 21789857Sobrien#else 21889857Sobrien#define CI_COMPILER_COUNT 1 21989857Sobrien#endif // COMPILER2 22089857Sobrien 221130561Sobrien#endif // no compilers 22289857Sobrien 22389857Sobrien// string type aliases used only in this file 22489857Sobrientypedef const char* ccstr; 22589857Sobrientypedef const char* ccstrlist; // represents string arguments which accumulate 22689857Sobrien 22789857Sobrienstruct Flag { 22889857Sobrien enum Flags { 22989857Sobrien // value origin 23089857Sobrien DEFAULT = 0, 23189857Sobrien COMMAND_LINE = 1, 23289857Sobrien ENVIRON_VAR = 2, 23389857Sobrien CONFIG_FILE = 3, 23489857Sobrien MANAGEMENT = 4, 23589857Sobrien ERGONOMIC = 5, 23689857Sobrien ATTACH_ON_DEMAND = 6, 23789857Sobrien INTERNAL = 7, 23889857Sobrien 23989857Sobrien LAST_VALUE_ORIGIN = INTERNAL, 24089857Sobrien VALUE_ORIGIN_BITS = 4, 24189857Sobrien VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 24289857Sobrien 24389857Sobrien // flag kind 24489857Sobrien KIND_PRODUCT = 1 << 4, 24589857Sobrien KIND_MANAGEABLE = 1 << 5, 24689857Sobrien KIND_DIAGNOSTIC = 1 << 6, 24789857Sobrien KIND_EXPERIMENTAL = 1 << 7, 24889857Sobrien KIND_NOT_PRODUCT = 1 << 8, 24989857Sobrien KIND_DEVELOP = 1 << 9, 25089857Sobrien KIND_PLATFORM_DEPENDENT = 1 << 10, 25189857Sobrien KIND_READ_WRITE = 1 << 11, 25289857Sobrien KIND_C1 = 1 << 12, 25389857Sobrien KIND_C2 = 1 << 13, 25489857Sobrien KIND_ARCH = 1 << 14, 25589857Sobrien KIND_SHARK = 1 << 15, 25689857Sobrien KIND_LP64_PRODUCT = 1 << 16, 25789857Sobrien KIND_COMMERCIAL = 1 << 17, 25889857Sobrien 25989857Sobrien KIND_MASK = ~VALUE_ORIGIN_MASK 26089857Sobrien }; 26189857Sobrien 26289857Sobrien enum Error { 26389857Sobrien // no error 26489857Sobrien SUCCESS = 0, 26589857Sobrien // flag name is missing 26689857Sobrien MISSING_NAME, 26789857Sobrien // flag value is missing 26889857Sobrien MISSING_VALUE, 26989857Sobrien // error parsing the textual form of the value 27089857Sobrien WRONG_FORMAT, 27189857Sobrien // flag is not writeable 27289857Sobrien NON_WRITABLE, 27389857Sobrien // flag value is outside of its bounds 27489857Sobrien OUT_OF_BOUNDS, 27589857Sobrien // flag value violates its constraint 27689857Sobrien VIOLATES_CONSTRAINT, 27789857Sobrien // there is no flag with the given name 27889857Sobrien INVALID_FLAG, 27989857Sobrien // other, unspecified error related to setting the flag 28089857Sobrien ERR_OTHER 28189857Sobrien }; 28289857Sobrien 28389857Sobrien const char* _type; 28489857Sobrien const char* _name; 28589857Sobrien void* _addr; 28689857Sobrien NOT_PRODUCT(const char* _doc;) 28789857Sobrien Flags _flags; 28889857Sobrien 28989857Sobrien // points to all Flags static array 29089857Sobrien static Flag* flags; 29189857Sobrien 29289857Sobrien // number of flags 29389857Sobrien static size_t numFlags; 29489857Sobrien 29589857Sobrien static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 29689857Sobrien static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 29789857Sobrien static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 29889857Sobrien 29989857Sobrien void check_writable(); 30089857Sobrien 30189857Sobrien bool is_bool() const; 30289857Sobrien bool get_bool() const; 30389857Sobrien void set_bool(bool value); 30489857Sobrien 30589857Sobrien bool is_int() const; 30689857Sobrien int get_int() const; 30789857Sobrien void set_int(int value); 30889857Sobrien 30989857Sobrien bool is_uint() const; 31089857Sobrien uint get_uint() const; 31189857Sobrien void set_uint(uint value); 31289857Sobrien 31389857Sobrien bool is_intx() const; 31489857Sobrien intx get_intx() const; 31589857Sobrien void set_intx(intx value); 31689857Sobrien 31789857Sobrien bool is_uintx() const; 31889857Sobrien uintx get_uintx() const; 31989857Sobrien void set_uintx(uintx value); 32089857Sobrien 32189857Sobrien bool is_uint64_t() const; 32289857Sobrien uint64_t get_uint64_t() const; 32389857Sobrien void set_uint64_t(uint64_t value); 32489857Sobrien 32589857Sobrien bool is_size_t() const; 32689857Sobrien size_t get_size_t() const; 32789857Sobrien void set_size_t(size_t value); 32889857Sobrien 32989857Sobrien bool is_double() const; 33089857Sobrien double get_double() const; 33189857Sobrien void set_double(double value); 33289857Sobrien 33389857Sobrien bool is_ccstr() const; 33489857Sobrien bool ccstr_accumulates() const; 33589857Sobrien ccstr get_ccstr() const; 33689857Sobrien void set_ccstr(ccstr value); 33789857Sobrien 33889857Sobrien Flags get_origin(); 33989857Sobrien void set_origin(Flags origin); 34089857Sobrien 34189857Sobrien bool is_default(); 34289857Sobrien bool is_ergonomic(); 34389857Sobrien bool is_command_line(); 34489857Sobrien 34589857Sobrien bool is_product() const; 34689857Sobrien bool is_manageable() const; 34789857Sobrien bool is_diagnostic() const; 34889857Sobrien bool is_experimental() const; 34989857Sobrien bool is_notproduct() const; 35089857Sobrien bool is_develop() const; 35189857Sobrien bool is_read_write() const; 35289857Sobrien bool is_commercial() const; 35389857Sobrien 35489857Sobrien bool is_constant_in_binary() const; 35589857Sobrien 35689857Sobrien bool is_unlocker() const; 35789857Sobrien bool is_unlocked() const; 35889857Sobrien bool is_writeable() const; 35989857Sobrien bool is_external() const; 36089857Sobrien 36189857Sobrien bool is_unlocker_ext() const; 36289857Sobrien bool is_unlocked_ext() const; 36389857Sobrien bool is_writeable_ext() const; 36489857Sobrien bool is_external_ext() const; 36589857Sobrien 36689857Sobrien void unlock_diagnostic(); 36789857Sobrien 36889857Sobrien void get_locked_message(char*, int) const; 36989857Sobrien void get_locked_message_ext(char*, int) const; 37089857Sobrien 37189857Sobrien // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 37289857Sobrien void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 37389857Sobrien void print_kind(outputStream* st); 37489857Sobrien void print_as_flag(outputStream* st); 37589857Sobrien 37689857Sobrien static const char* flag_error_str(Flag::Error error); 37789857Sobrien}; 37889857Sobrien 37989857Sobrien// debug flags control various aspects of the VM and are global accessible 38089857Sobrien 38189857Sobrien// use FlagSetting to temporarily change some debug flag 38289857Sobrien// e.g. FlagSetting fs(DebugThisAndThat, true); 38389857Sobrien// restored to previous value upon leaving scope 38489857Sobrienclass FlagSetting { 38589857Sobrien bool val; 38689857Sobrien bool* flag; 38789857Sobrien public: 38889857Sobrien FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 38989857Sobrien ~FlagSetting() { *flag = val; } 39089857Sobrien}; 39189857Sobrien 39289857Sobrien 39389857Sobrienclass CounterSetting { 39489857Sobrien intx* counter; 39589857Sobrien public: 39689857Sobrien CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 39789857Sobrien ~CounterSetting() { (*counter)--; } 39889857Sobrien}; 39989857Sobrien 40089857Sobrienclass IntFlagSetting { 40189857Sobrien int val; 40289857Sobrien int* flag; 40389857Sobrien public: 40489857Sobrien IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 40589857Sobrien ~IntFlagSetting() { *flag = val; } 40689857Sobrien}; 40789857Sobrien 40889857Sobrienclass UIntFlagSetting { 40989857Sobrien uint val; 41089857Sobrien uint* flag; 41189857Sobrien public: 41289857Sobrien UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 41389857Sobrien ~UIntFlagSetting() { *flag = val; } 41489857Sobrien}; 41589857Sobrien 41689857Sobrienclass UIntXFlagSetting { 41789857Sobrien uintx val; 41889857Sobrien uintx* flag; 41989857Sobrien public: 42089857Sobrien UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 42189857Sobrien ~UIntXFlagSetting() { *flag = val; } 42289857Sobrien}; 42389857Sobrien 42489857Sobrienclass DoubleFlagSetting { 42589857Sobrien double val; 42689857Sobrien double* flag; 42789857Sobrien public: 42889857Sobrien DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 42989857Sobrien ~DoubleFlagSetting() { *flag = val; } 43089857Sobrien}; 43189857Sobrien 43289857Sobrienclass SizeTFlagSetting { 43389857Sobrien size_t val; 43489857Sobrien size_t* flag; 43589857Sobrien public: 43689857Sobrien SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 43789857Sobrien ~SizeTFlagSetting() { *flag = val; } 43889857Sobrien}; 43989857Sobrien 44089857Sobrien 44189857Sobrienclass CommandLineFlags { 44289857Sobrienpublic: 44389857Sobrien static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 44489857Sobrien 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); } 44589857Sobrien static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 44689857Sobrien static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 44789857Sobrien 44889857Sobrien static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 44989857Sobrien 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); } 45089857Sobrien static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 45189857Sobrien static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 45289857Sobrien 45389857Sobrien static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 45489857Sobrien 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); } 45589857Sobrien static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 45689857Sobrien static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 45789857Sobrien 45889857Sobrien static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 45989857Sobrien 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); } 46089857Sobrien static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 46189857Sobrien static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 46289857Sobrien 46389857Sobrien static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 46489857Sobrien 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); } 46589857Sobrien static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 46689857Sobrien static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 46789857Sobrien 46889857Sobrien static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 46989857Sobrien 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); } 47089857Sobrien static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 47189857Sobrien static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 47289857Sobrien 47389857Sobrien static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 47489857Sobrien 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); } 47589857Sobrien static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 47689857Sobrien static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 47789857Sobrien 47889857Sobrien static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 47989857Sobrien 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); } 48089857Sobrien static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 48189857Sobrien static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 48289857Sobrien 48389857Sobrien static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 48489857Sobrien 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); } 48589857Sobrien // Contract: Flag will make private copy of the incoming value. 48689857Sobrien // Outgoing value is always malloc-ed, and caller MUST call free. 48789857Sobrien static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 48889857Sobrien static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 48989857Sobrien 49089857Sobrien // Returns false if name is not a command line flag. 49189857Sobrien static bool wasSetOnCmdline(const char* name, bool* value); 49289857Sobrien static void printSetFlags(outputStream* out); 49389857Sobrien 49489857Sobrien // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 49589857Sobrien static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 49689857Sobrien 49789857Sobrien static void verify() PRODUCT_RETURN; 49889857Sobrien}; 49989857Sobrien 50089857Sobrien// use this for flags that are true by default in the debug version but 50189857Sobrien// false in the optimized version, and vice versa 50289857Sobrien#ifdef ASSERT 50389857Sobrien#define trueInDebug true 50489857Sobrien#define falseInDebug false 50589857Sobrien#else 50689857Sobrien#define trueInDebug false 50789857Sobrien#define falseInDebug true 50889857Sobrien#endif 50989857Sobrien 51089857Sobrien// use this for flags that are true per default in the product build 51189857Sobrien// but false in development builds, and vice versa 51289857Sobrien#ifdef PRODUCT 51389857Sobrien#define trueInProduct true 51489857Sobrien#define falseInProduct false 51589857Sobrien#else 51689857Sobrien#define trueInProduct false 51789857Sobrien#define falseInProduct true 51889857Sobrien#endif 51989857Sobrien 52089857Sobrien#ifdef JAVASE_EMBEDDED 52189857Sobrien#define falseInEmbedded false 52289857Sobrien#else 52389857Sobrien#define falseInEmbedded true 524#endif 525 526// develop flags are settable / visible only during development and are constant in the PRODUCT version 527// product flags are always settable / visible 528// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 529 530// A flag must be declared with one of the following types: 531// bool, intx, uintx, size_t, ccstr, double, or uint64_t. 532// The type "ccstr" is an alias for "const char*" and is used 533// only in this file, because the macrology requires single-token type names. 534 535// Note: Diagnostic options not meant for VM tuning or for product modes. 536// They are to be used for VM quality assurance or field diagnosis 537// of VM bugs. They are hidden so that users will not be encouraged to 538// try them as if they were VM ordinary execution options. However, they 539// are available in the product version of the VM. Under instruction 540// from support engineers, VM customers can turn them on to collect 541// diagnostic information about VM problems. To use a VM diagnostic 542// option, you must first specify +UnlockDiagnosticVMOptions. 543// (This master switch also affects the behavior of -Xprintflags.) 544// 545// experimental flags are in support of features that are not 546// part of the officially supported product, but are available 547// for experimenting with. They could, for example, be performance 548// features that may not have undergone full or rigorous QA, but which may 549// help performance in some cases and released for experimentation 550// by the community of users and developers. This flag also allows one to 551// be able to build a fully supported product that nonetheless also 552// ships with some unsupported, lightly tested, experimental features. 553// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 554// UnlockExperimentalVMOptions flag, which allows the control and 555// modification of the experimental flags. 556// 557// Nota bene: neither diagnostic nor experimental options should be used casually, 558// and they are not supported on production loads, except under explicit 559// direction from support engineers. 560// 561// manageable flags are writeable external product flags. 562// They are dynamically writeable through the JDK management interface 563// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 564// These flags are external exported interface (see CCC). The list of 565// manageable flags can be queried programmatically through the management 566// interface. 567// 568// A flag can be made as "manageable" only if 569// - the flag is defined in a CCC as an external exported interface. 570// - the VM implementation supports dynamic setting of the flag. 571// This implies that the VM must *always* query the flag variable 572// and not reuse state related to the flag state at any given time. 573// - you want the flag to be queried programmatically by the customers. 574// 575// product_rw flags are writeable internal product flags. 576// They are like "manageable" flags but for internal/private use. 577// The list of product_rw flags are internal/private flags which 578// may be changed/removed in a future release. It can be set 579// through the management interface to get/set value 580// when the name of flag is supplied. 581// 582// A flag can be made as "product_rw" only if 583// - the VM implementation supports dynamic setting of the flag. 584// This implies that the VM must *always* query the flag variable 585// and not reuse state related to the flag state at any given time. 586// 587// Note that when there is a need to support develop flags to be writeable, 588// it can be done in the same way as product_rw. 589// 590// range is a macro that will expand to min and max arguments for range 591// checking code if provided - see commandLineFlagRangeList.hpp 592// 593// constraint is a macro that will expand to custom function call 594// for constraint checking if provided - see commandLineFlagConstraintList.hpp 595// 596 597#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 598 \ 599 lp64_product(bool, UseCompressedOops, false, \ 600 "Use 32-bit object references in 64-bit VM. " \ 601 "lp64_product means flag is always constant in 32 bit VM") \ 602 \ 603 lp64_product(bool, UseCompressedClassPointers, false, \ 604 "Use 32-bit class pointers in 64-bit VM. " \ 605 "lp64_product means flag is always constant in 32 bit VM") \ 606 \ 607 notproduct(bool, CheckCompressedOops, true, \ 608 "Generate checks in encoding/decoding code in debug VM") \ 609 \ 610 product_pd(size_t, HeapBaseMinAddress, \ 611 "OS specific low limit for heap base address") \ 612 \ 613 product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 614 "Heap allocation steps through preferred address regions to find" \ 615 " where it can allocate the heap. Number of steps to take per " \ 616 "region.") \ 617 range(1, max_uintx) \ 618 \ 619 diagnostic(bool, PrintCompressedOopsMode, false, \ 620 "Print compressed oops base address and encoding mode") \ 621 \ 622 lp64_product(intx, ObjectAlignmentInBytes, 8, \ 623 "Default object alignment in bytes, 8 is minimum") \ 624 range(8, 256) \ 625 constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 626 \ 627 product(bool, AssumeMP, false, \ 628 "Instruct the VM to assume multiple processors are available") \ 629 \ 630 /* UseMembar is theoretically a temp flag used for memory barrier */ \ 631 /* removal testing. It was supposed to be removed before FCS but has */ \ 632 /* been re-added (see 6401008) */ \ 633 product_pd(bool, UseMembar, \ 634 "(Unstable) Issues membars on thread state transitions") \ 635 \ 636 develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 637 "Clean the chunk pool asynchronously") \ 638 \ 639 experimental(bool, AlwaysSafeConstructors, false, \ 640 "Force safe construction, as if all fields are final.") \ 641 \ 642 diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 643 "Enable normal processing of flags relating to field diagnostics")\ 644 \ 645 experimental(bool, UnlockExperimentalVMOptions, false, \ 646 "Enable normal processing of flags relating to experimental " \ 647 "features") \ 648 \ 649 product(bool, JavaMonitorsInStackTrace, true, \ 650 "Print information about Java monitor locks when the stacks are" \ 651 "dumped") \ 652 \ 653 product_pd(bool, UseLargePages, \ 654 "Use large page memory") \ 655 \ 656 product_pd(bool, UseLargePagesIndividualAllocation, \ 657 "Allocate large pages individually for better affinity") \ 658 \ 659 develop(bool, LargePagesIndividualAllocationInjectError, false, \ 660 "Fail large pages individual allocation") \ 661 \ 662 product(bool, UseLargePagesInMetaspace, false, \ 663 "Use large page memory in metaspace. " \ 664 "Only used if UseLargePages is enabled.") \ 665 \ 666 develop(bool, TracePageSizes, false, \ 667 "Trace page size selection and usage") \ 668 \ 669 product(bool, UseNUMA, false, \ 670 "Use NUMA if available") \ 671 \ 672 product(bool, UseNUMAInterleaving, false, \ 673 "Interleave memory across NUMA nodes if available") \ 674 \ 675 product(size_t, NUMAInterleaveGranularity, 2*M, \ 676 "Granularity to use for NUMA interleaving on Windows OS") \ 677 \ 678 product(bool, ForceNUMA, false, \ 679 "Force NUMA optimizations on single-node/UMA systems") \ 680 \ 681 product(uintx, NUMAChunkResizeWeight, 20, \ 682 "Percentage (0-100) used to weight the current sample when " \ 683 "computing exponentially decaying average for " \ 684 "AdaptiveNUMAChunkSizing") \ 685 range(0, 100) \ 686 \ 687 product(size_t, NUMASpaceResizeRate, 1*G, \ 688 "Do not reallocate more than this amount per collection") \ 689 \ 690 product(bool, UseAdaptiveNUMAChunkSizing, true, \ 691 "Enable adaptive chunk sizing for NUMA") \ 692 \ 693 product(bool, NUMAStats, false, \ 694 "Print NUMA stats in detailed heap information") \ 695 \ 696 product(uintx, NUMAPageScanRate, 256, \ 697 "Maximum number of pages to include in the page scan procedure") \ 698 \ 699 product_pd(bool, NeedsDeoptSuspend, \ 700 "True for register window machines (sparc/ia64)") \ 701 \ 702 product(intx, UseSSE, 99, \ 703 "Highest supported SSE instructions set on x86/x64") \ 704 \ 705 product(bool, UseAES, false, \ 706 "Control whether AES instructions can be used on x86/x64") \ 707 \ 708 product(bool, UseSHA, false, \ 709 "Control whether SHA instructions can be used " \ 710 "on SPARC and on ARM") \ 711 \ 712 product(bool, UseGHASHIntrinsics, false, \ 713 "Use intrinsics for GHASH versions of crypto") \ 714 \ 715 product(size_t, LargePageSizeInBytes, 0, \ 716 "Large page size (0 to let VM choose the page size)") \ 717 \ 718 product(size_t, LargePageHeapSizeThreshold, 128*M, \ 719 "Use large pages if maximum heap is at least this big") \ 720 \ 721 product(bool, ForceTimeHighResolution, false, \ 722 "Using high time resolution (for Win32 only)") \ 723 \ 724 develop(bool, TraceItables, false, \ 725 "Trace initialization and use of itables") \ 726 \ 727 develop(bool, TracePcPatching, false, \ 728 "Trace usage of frame::patch_pc") \ 729 \ 730 develop(bool, TraceJumps, false, \ 731 "Trace assembly jumps in thread ring buffer") \ 732 \ 733 develop(bool, TraceRelocator, false, \ 734 "Trace the bytecode relocator") \ 735 \ 736 develop(bool, TraceLongCompiles, false, \ 737 "Print out every time compilation is longer than " \ 738 "a given threshold") \ 739 \ 740 develop(bool, SafepointALot, false, \ 741 "Generate a lot of safepoints. This works with " \ 742 "GuaranteedSafepointInterval") \ 743 \ 744 product_pd(bool, BackgroundCompilation, \ 745 "A thread requesting compilation is not blocked during " \ 746 "compilation") \ 747 \ 748 product(bool, PrintVMQWaitTime, false, \ 749 "Print out the waiting time in VM operation queue") \ 750 \ 751 develop(bool, TraceOopMapGeneration, false, \ 752 "Show OopMapGeneration") \ 753 \ 754 product(bool, MethodFlushing, true, \ 755 "Reclamation of zombie and not-entrant methods") \ 756 \ 757 develop(bool, VerifyStack, false, \ 758 "Verify stack of each thread when it is entering a runtime call") \ 759 \ 760 diagnostic(bool, ForceUnreachable, false, \ 761 "Make all non code cache addresses to be unreachable by " \ 762 "forcing use of 64bit literal fixups") \ 763 \ 764 notproduct(bool, StressDerivedPointers, false, \ 765 "Force scavenge when a derived pointer is detected on stack " \ 766 "after rtm call") \ 767 \ 768 develop(bool, TraceDerivedPointers, false, \ 769 "Trace traversal of derived pointers on stack") \ 770 \ 771 notproduct(bool, TraceCodeBlobStacks, false, \ 772 "Trace stack-walk of codeblobs") \ 773 \ 774 product(bool, PrintJNIResolving, false, \ 775 "Used to implement -v:jni") \ 776 \ 777 notproduct(bool, PrintRewrites, false, \ 778 "Print methods that are being rewritten") \ 779 \ 780 product(bool, UseInlineCaches, true, \ 781 "Use Inline Caches for virtual calls ") \ 782 \ 783 develop(bool, InlineArrayCopy, true, \ 784 "Inline arraycopy native that is known to be part of " \ 785 "base library DLL") \ 786 \ 787 develop(bool, InlineObjectHash, true, \ 788 "Inline Object::hashCode() native that is known to be part " \ 789 "of base library DLL") \ 790 \ 791 develop(bool, InlineNatives, true, \ 792 "Inline natives that are known to be part of base library DLL") \ 793 \ 794 develop(bool, InlineMathNatives, true, \ 795 "Inline SinD, CosD, etc.") \ 796 \ 797 develop(bool, InlineClassNatives, true, \ 798 "Inline Class.isInstance, etc") \ 799 \ 800 develop(bool, InlineThreadNatives, true, \ 801 "Inline Thread.currentThread, etc") \ 802 \ 803 develop(bool, InlineUnsafeOps, true, \ 804 "Inline memory ops (native methods) from sun.misc.Unsafe") \ 805 \ 806 product(bool, CriticalJNINatives, true, \ 807 "Check for critical JNI entry points") \ 808 \ 809 notproduct(bool, StressCriticalJNINatives, false, \ 810 "Exercise register saving code in critical natives") \ 811 \ 812 product(bool, UseSSE42Intrinsics, false, \ 813 "SSE4.2 versions of intrinsics") \ 814 \ 815 product(bool, UseAESIntrinsics, false, \ 816 "Use intrinsics for AES versions of crypto") \ 817 \ 818 product(bool, UseSHA1Intrinsics, false, \ 819 "Use intrinsics for SHA-1 crypto hash function. " \ 820 "Requires that UseSHA is enabled.") \ 821 \ 822 product(bool, UseSHA256Intrinsics, false, \ 823 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 824 "Requires that UseSHA is enabled.") \ 825 \ 826 product(bool, UseSHA512Intrinsics, false, \ 827 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 828 "Requires that UseSHA is enabled.") \ 829 \ 830 product(bool, UseCRC32Intrinsics, false, \ 831 "use intrinsics for java.util.zip.CRC32") \ 832 \ 833 product(bool, UseCRC32CIntrinsics, false, \ 834 "use intrinsics for java.util.zip.CRC32C") \ 835 \ 836 product(bool, UseAdler32Intrinsics, false, \ 837 "use intrinsics for java.util.zip.Adler32") \ 838 \ 839 diagnostic(ccstrlist, DisableIntrinsic, "", \ 840 "do not expand intrinsics whose (internal) names appear here") \ 841 \ 842 develop(bool, TraceCallFixup, false, \ 843 "Trace all call fixups") \ 844 \ 845 develop(bool, DeoptimizeALot, false, \ 846 "Deoptimize at every exit from the runtime system") \ 847 \ 848 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 849 "A comma separated list of bcis to deoptimize at") \ 850 \ 851 product(bool, DeoptimizeRandom, false, \ 852 "Deoptimize random frames on random exit from the runtime system")\ 853 \ 854 notproduct(bool, ZombieALot, false, \ 855 "Create zombies (non-entrant) at exit from the runtime system") \ 856 \ 857 product(bool, UnlinkSymbolsALot, false, \ 858 "Unlink unreferenced symbols from the symbol table at safepoints")\ 859 \ 860 notproduct(bool, WalkStackALot, false, \ 861 "Trace stack (no print) at every exit from the runtime system") \ 862 \ 863 product(bool, Debugging, false, \ 864 "Set when executing debug methods in debug.cpp " \ 865 "(to prevent triggering assertions)") \ 866 \ 867 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 868 "Enable strict checks that safepoints cannot happen for threads " \ 869 "that use No_Safepoint_Verifier") \ 870 \ 871 notproduct(bool, VerifyLastFrame, false, \ 872 "Verify oops on last frame on entry to VM") \ 873 \ 874 develop(bool, TraceHandleAllocation, false, \ 875 "Print out warnings when suspiciously many handles are allocated")\ 876 \ 877 product(bool, FailOverToOldVerifier, true, \ 878 "Fail over to old verifier when split verifier fails") \ 879 \ 880 develop(bool, ShowSafepointMsgs, false, \ 881 "Show message about safepoint synchronization") \ 882 \ 883 product(bool, SafepointTimeout, false, \ 884 "Time out and warn or fail after SafepointTimeoutDelay " \ 885 "milliseconds if failed to reach safepoint") \ 886 \ 887 develop(bool, DieOnSafepointTimeout, false, \ 888 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 889 \ 890 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 891 /* typically, at most a few retries are needed */ \ 892 product(intx, SuspendRetryCount, 50, \ 893 "Maximum retry count for an external suspend request") \ 894 \ 895 product(intx, SuspendRetryDelay, 5, \ 896 "Milliseconds to delay per retry (* current_retry_count)") \ 897 \ 898 product(bool, AssertOnSuspendWaitFailure, false, \ 899 "Assert/Guarantee on external suspend wait failure") \ 900 \ 901 product(bool, TraceSuspendWaitFailures, false, \ 902 "Trace external suspend wait failures") \ 903 \ 904 product(bool, MaxFDLimit, true, \ 905 "Bump the number of file descriptors to maximum in Solaris") \ 906 \ 907 diagnostic(bool, LogEvents, true, \ 908 "Enable the various ring buffer event logs") \ 909 \ 910 diagnostic(uintx, LogEventsBufferEntries, 10, \ 911 "Number of ring buffer event logs") \ 912 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 913 \ 914 product(bool, BytecodeVerificationRemote, true, \ 915 "Enable the Java bytecode verifier for remote classes") \ 916 \ 917 product(bool, BytecodeVerificationLocal, false, \ 918 "Enable the Java bytecode verifier for local classes") \ 919 \ 920 develop(bool, ForceFloatExceptions, trueInDebug, \ 921 "Force exceptions on FP stack under/overflow") \ 922 \ 923 develop(bool, VerifyStackAtCalls, false, \ 924 "Verify that the stack pointer is unchanged after calls") \ 925 \ 926 develop(bool, TraceJavaAssertions, false, \ 927 "Trace java language assertions") \ 928 \ 929 notproduct(bool, CheckAssertionStatusDirectives, false, \ 930 "Temporary - see javaClasses.cpp") \ 931 \ 932 notproduct(bool, PrintMallocFree, false, \ 933 "Trace calls to C heap malloc/free allocation") \ 934 \ 935 product(bool, PrintOopAddress, false, \ 936 "Always print the location of the oop") \ 937 \ 938 notproduct(bool, VerifyCodeCache, false, \ 939 "Verify code cache on memory allocation/deallocation") \ 940 \ 941 develop(bool, UseMallocOnly, false, \ 942 "Use only malloc/free for allocation (no resource area/arena)") \ 943 \ 944 develop(bool, PrintMalloc, false, \ 945 "Print all malloc/free calls") \ 946 \ 947 develop(bool, PrintMallocStatistics, false, \ 948 "Print malloc/free statistics") \ 949 \ 950 develop(bool, ZapResourceArea, trueInDebug, \ 951 "Zap freed resource/arena space with 0xABABABAB") \ 952 \ 953 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 954 "Zap freed VM handle space with 0xBCBCBCBC") \ 955 \ 956 develop(bool, ZapJNIHandleArea, trueInDebug, \ 957 "Zap freed JNI handle space with 0xFEFEFEFE") \ 958 \ 959 notproduct(bool, ZapStackSegments, trueInDebug, \ 960 "Zap allocated/freed stack segments with 0xFADFADED") \ 961 \ 962 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 963 "Zap unused heap space with 0xBAADBABE") \ 964 \ 965 develop(bool, TraceZapUnusedHeapArea, false, \ 966 "Trace zapping of unused heap space") \ 967 \ 968 develop(bool, CheckZapUnusedHeapArea, false, \ 969 "Check zapping of unused heap space") \ 970 \ 971 develop(bool, ZapFillerObjects, trueInDebug, \ 972 "Zap filler objects with 0xDEAFBABE") \ 973 \ 974 develop(bool, PrintVMMessages, true, \ 975 "Print VM messages on console") \ 976 \ 977 product(bool, PrintGCApplicationConcurrentTime, false, \ 978 "Print the time the application has been running") \ 979 \ 980 product(bool, PrintGCApplicationStoppedTime, false, \ 981 "Print the time the application has been stopped") \ 982 \ 983 diagnostic(bool, VerboseVerification, false, \ 984 "Display detailed verification details") \ 985 \ 986 notproduct(uintx, ErrorHandlerTest, 0, \ 987 "If > 0, provokes an error after VM initialization; the value " \ 988 "determines which error to provoke. See test_error_handler() " \ 989 "in debug.cpp.") \ 990 \ 991 notproduct(uintx, TestCrashInErrorHandler, 0, \ 992 "If > 0, provokes an error inside VM error handler (a secondary " \ 993 "crash). see test_error_handler() in debug.cpp.") \ 994 \ 995 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 996 "If true, tests SafeFetch inside error handler.") \ 997 \ 998 develop(bool, Verbose, false, \ 999 "Print additional debugging information from other modes") \ 1000 \ 1001 develop(bool, PrintMiscellaneous, false, \ 1002 "Print uncategorized debugging information (requires +Verbose)") \ 1003 \ 1004 develop(bool, WizardMode, false, \ 1005 "Print much more debugging information") \ 1006 \ 1007 product(bool, ShowMessageBoxOnError, false, \ 1008 "Keep process alive on VM fatal error") \ 1009 \ 1010 product(bool, CreateCoredumpOnCrash, true, \ 1011 "Create core/mini dump on VM fatal error") \ 1012 \ 1013 product(uintx, ErrorLogTimeout, 2 * 60, \ 1014 "Timeout, in seconds, to limit the time spent on writing an " \ 1015 "error log in case of a crash.") \ 1016 \ 1017 product_pd(bool, UseOSErrorReporting, \ 1018 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1019 \ 1020 product(bool, SuppressFatalErrorMessage, false, \ 1021 "Report NO fatal error message (avoid deadlock)") \ 1022 \ 1023 product(ccstrlist, OnError, "", \ 1024 "Run user-defined commands on fatal error; see VMError.cpp " \ 1025 "for examples") \ 1026 \ 1027 product(ccstrlist, OnOutOfMemoryError, "", \ 1028 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1029 \ 1030 manageable(bool, HeapDumpBeforeFullGC, false, \ 1031 "Dump heap to file before any major stop-the-world GC") \ 1032 \ 1033 manageable(bool, HeapDumpAfterFullGC, false, \ 1034 "Dump heap to file after any major stop-the-world GC") \ 1035 \ 1036 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1037 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1038 \ 1039 manageable(ccstr, HeapDumpPath, NULL, \ 1040 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1041 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1042 "in the working directory)") \ 1043 \ 1044 develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1045 "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 1046 "when the heap usage is larger than this") \ 1047 \ 1048 develop(size_t, HeapDumpSegmentSize, 1*G, \ 1049 "Approximate segment size when generating a segmented heap dump") \ 1050 \ 1051 develop(bool, BreakAtWarning, false, \ 1052 "Execute breakpoint upon encountering VM warning") \ 1053 \ 1054 develop(bool, TraceVMOperation, false, \ 1055 "Trace VM operations") \ 1056 \ 1057 develop(bool, UseFakeTimers, false, \ 1058 "Tell whether the VM should use system time or a fake timer") \ 1059 \ 1060 product(ccstr, NativeMemoryTracking, "off", \ 1061 "Native memory tracking options") \ 1062 \ 1063 diagnostic(bool, PrintNMTStatistics, false, \ 1064 "Print native memory tracking summary data if it is on") \ 1065 \ 1066 diagnostic(bool, LogCompilation, false, \ 1067 "Log compilation activity in detail to LogFile") \ 1068 \ 1069 product(bool, PrintCompilation, false, \ 1070 "Print compilations") \ 1071 \ 1072 diagnostic(bool, TraceNMethodInstalls, false, \ 1073 "Trace nmethod installation") \ 1074 \ 1075 diagnostic(intx, ScavengeRootsInCode, 2, \ 1076 "0: do not allow scavengable oops in the code cache; " \ 1077 "1: allow scavenging from the code cache; " \ 1078 "2: emit as many constants as the compiler can see") \ 1079 range(0, 2) \ 1080 \ 1081 product(bool, AlwaysRestoreFPU, false, \ 1082 "Restore the FPU control word after every JNI call (expensive)") \ 1083 \ 1084 diagnostic(bool, PrintCompilation2, false, \ 1085 "Print additional statistics per compilation") \ 1086 \ 1087 diagnostic(bool, PrintAdapterHandlers, false, \ 1088 "Print code generated for i2c/c2i adapters") \ 1089 \ 1090 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1091 "Verify that i2c/c2i adapters are called properly") \ 1092 \ 1093 develop(bool, VerifyAdapterSharing, false, \ 1094 "Verify that the code for shared adapters is the equivalent") \ 1095 \ 1096 diagnostic(bool, PrintAssembly, false, \ 1097 "Print assembly code (using external disassembler.so)") \ 1098 \ 1099 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1100 "Print options string passed to disassembler.so") \ 1101 \ 1102 diagnostic(bool, PrintNMethods, false, \ 1103 "Print assembly code for nmethods when generated") \ 1104 \ 1105 diagnostic(bool, PrintNativeNMethods, false, \ 1106 "Print assembly code for native nmethods when generated") \ 1107 \ 1108 develop(bool, PrintDebugInfo, false, \ 1109 "Print debug information for all nmethods when generated") \ 1110 \ 1111 develop(bool, PrintRelocations, false, \ 1112 "Print relocation information for all nmethods when generated") \ 1113 \ 1114 develop(bool, PrintDependencies, false, \ 1115 "Print dependency information for all nmethods when generated") \ 1116 \ 1117 develop(bool, PrintExceptionHandlers, false, \ 1118 "Print exception handler tables for all nmethods when generated") \ 1119 \ 1120 develop(bool, StressCompiledExceptionHandlers, false, \ 1121 "Exercise compiled exception handlers") \ 1122 \ 1123 develop(bool, InterceptOSException, false, \ 1124 "Start debugger when an implicit OS (e.g. NULL) " \ 1125 "exception happens") \ 1126 \ 1127 product(bool, PrintCodeCache, false, \ 1128 "Print the code cache memory usage when exiting") \ 1129 \ 1130 develop(bool, PrintCodeCache2, false, \ 1131 "Print detailed usage information on the code cache when exiting")\ 1132 \ 1133 product(bool, PrintCodeCacheOnCompilation, false, \ 1134 "Print the code cache memory usage each time a method is " \ 1135 "compiled") \ 1136 \ 1137 diagnostic(bool, PrintStubCode, false, \ 1138 "Print generated stub code") \ 1139 \ 1140 product(bool, StackTraceInThrowable, true, \ 1141 "Collect backtrace in throwable when exception happens") \ 1142 \ 1143 product(bool, OmitStackTraceInFastThrow, true, \ 1144 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1145 \ 1146 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1147 "Print bytecode statistics when dumping profiler output") \ 1148 \ 1149 product(bool, ProfilerRecordPC, false, \ 1150 "Collect ticks for each 16 byte interval of compiled code") \ 1151 \ 1152 product(bool, ProfileVM, false, \ 1153 "Profile ticks that fall within VM (either in the VM Thread " \ 1154 "or VM code called through stubs)") \ 1155 \ 1156 product(bool, ProfileIntervals, false, \ 1157 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1158 \ 1159 notproduct(bool, ProfilerCheckIntervals, false, \ 1160 "Collect and print information on spacing of profiler ticks") \ 1161 \ 1162 product(bool, PrintWarnings, true, \ 1163 "Print JVM warnings to output stream") \ 1164 \ 1165 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1166 "Print warnings for stalled SpinLocks") \ 1167 \ 1168 product(bool, RegisterFinalizersAtInit, true, \ 1169 "Register finalizable objects at end of Object.<init> or " \ 1170 "after allocation") \ 1171 \ 1172 develop(bool, RegisterReferences, true, \ 1173 "Tell whether the VM should register soft/weak/final/phantom " \ 1174 "references") \ 1175 \ 1176 develop(bool, IgnoreRewrites, false, \ 1177 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1178 "This is unsafe!") \ 1179 \ 1180 develop(bool, PrintCodeCacheExtension, false, \ 1181 "Print extension of code cache") \ 1182 \ 1183 develop(bool, UsePrivilegedStack, true, \ 1184 "Enable the security JVM functions") \ 1185 \ 1186 develop(bool, ProtectionDomainVerification, true, \ 1187 "Verify protection domain before resolution in system dictionary")\ 1188 \ 1189 product(bool, ClassUnloading, true, \ 1190 "Do unloading of classes") \ 1191 \ 1192 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1193 "Do unloading of classes with a concurrent marking cycle") \ 1194 \ 1195 develop(bool, DisableStartThread, false, \ 1196 "Disable starting of additional Java threads " \ 1197 "(for debugging only)") \ 1198 \ 1199 develop(bool, MemProfiling, false, \ 1200 "Write memory usage profiling to log file") \ 1201 \ 1202 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1203 "Print the system dictionary at exit") \ 1204 \ 1205 experimental(intx, PredictedLoadedClassCount, 0, \ 1206 "Experimental: Tune loaded class cache starting size") \ 1207 \ 1208 diagnostic(bool, UnsyncloadClass, false, \ 1209 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1210 "class loader must call VM synchronized for findClass " \ 1211 "and defineClass.") \ 1212 \ 1213 product(bool, AlwaysLockClassLoader, false, \ 1214 "Require the VM to acquire the class loader lock before calling " \ 1215 "loadClass() even for class loaders registering " \ 1216 "as parallel capable") \ 1217 \ 1218 product(bool, AllowParallelDefineClass, false, \ 1219 "Allow parallel defineClass requests for class loaders " \ 1220 "registering as parallel capable") \ 1221 \ 1222 product(bool, MustCallLoadClassInternal, false, \ 1223 "Call loadClassInternal() rather than loadClass()") \ 1224 \ 1225 product_pd(bool, DontYieldALot, \ 1226 "Throw away obvious excess yield calls") \ 1227 \ 1228 product_pd(bool, ConvertSleepToYield, \ 1229 "Convert sleep(0) to thread yield " \ 1230 "(may be off for Solaris to improve GUI)") \ 1231 \ 1232 product(bool, ConvertYieldToSleep, false, \ 1233 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1234 "behavior") \ 1235 \ 1236 develop(bool, UseDetachedThreads, true, \ 1237 "Use detached threads that are recycled upon termination " \ 1238 "(for Solaris only)") \ 1239 \ 1240 product(bool, UseLWPSynchronization, true, \ 1241 "Use LWP-based instead of libthread-based synchronization " \ 1242 "(SPARC only)") \ 1243 \ 1244 experimental(ccstr, SyncKnobs, NULL, \ 1245 "(Unstable) Various monitor synchronization tunables") \ 1246 \ 1247 experimental(intx, EmitSync, 0, \ 1248 "(Unsafe, Unstable) " \ 1249 "Control emission of inline sync fast-path code") \ 1250 \ 1251 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1252 \ 1253 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1254 \ 1255 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1256 "Experimental Sync flags") \ 1257 \ 1258 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1259 \ 1260 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1261 \ 1262 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1263 \ 1264 experimental(intx, hashCode, 5, \ 1265 "(Unstable) select hashCode generation algorithm") \ 1266 \ 1267 experimental(intx, WorkAroundNPTLTimedWaitHang, 0, \ 1268 "(Unstable, Linux-specific) " \ 1269 "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1270 \ 1271 product(bool, FilterSpuriousWakeups, true, \ 1272 "When true prevents OS-level spurious, or premature, wakeups " \ 1273 "from Object.wait (Ignored for Windows)") \ 1274 \ 1275 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1276 \ 1277 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1278 \ 1279 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1280 \ 1281 develop(bool, UsePthreads, false, \ 1282 "Use pthread-based instead of libthread-based synchronization " \ 1283 "(SPARC only)") \ 1284 \ 1285 product(bool, ReduceSignalUsage, false, \ 1286 "Reduce the use of OS signals in Java and/or the VM") \ 1287 \ 1288 develop_pd(bool, ShareVtableStubs, \ 1289 "Share vtable stubs (smaller code but worse branch prediction") \ 1290 \ 1291 develop(bool, LoadLineNumberTables, true, \ 1292 "Tell whether the class file parser loads line number tables") \ 1293 \ 1294 develop(bool, LoadLocalVariableTables, true, \ 1295 "Tell whether the class file parser loads local variable tables") \ 1296 \ 1297 develop(bool, LoadLocalVariableTypeTables, true, \ 1298 "Tell whether the class file parser loads local variable type" \ 1299 "tables") \ 1300 \ 1301 product(bool, AllowUserSignalHandlers, false, \ 1302 "Do not complain if the application installs signal handlers " \ 1303 "(Solaris & Linux only)") \ 1304 \ 1305 product(bool, UseSignalChaining, true, \ 1306 "Use signal-chaining to invoke signal handlers installed " \ 1307 "by the application (Solaris & Linux only)") \ 1308 \ 1309 product(bool, UseAltSigs, false, \ 1310 "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1311 "internal signals (Solaris only)") \ 1312 \ 1313 product(bool, AllowJNIEnvProxy, false, \ 1314 "Allow JNIEnv proxies for jdbx") \ 1315 \ 1316 product(bool, JNIDetachReleasesMonitors, true, \ 1317 "JNI DetachCurrentThread releases monitors owned by thread") \ 1318 \ 1319 product(bool, RestoreMXCSROnJNICalls, false, \ 1320 "Restore MXCSR when returning from JNI calls") \ 1321 \ 1322 product(bool, CheckJNICalls, false, \ 1323 "Verify all arguments to JNI calls") \ 1324 \ 1325 product(bool, CheckEndorsedAndExtDirs, false, \ 1326 "Verify the endorsed and extension directories are not used") \ 1327 \ 1328 product(bool, UseFastJNIAccessors, true, \ 1329 "Use optimized versions of Get<Primitive>Field") \ 1330 \ 1331 product(intx, MaxJNILocalCapacity, 65536, \ 1332 "Maximum allowable local JNI handle capacity to " \ 1333 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1334 "where <= 0 is unlimited, default: 65536") \ 1335 \ 1336 product(bool, EagerXrunInit, false, \ 1337 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1338 "but not all -Xrun libraries may support the state of the VM " \ 1339 "at this time") \ 1340 \ 1341 product(bool, PreserveAllAnnotations, false, \ 1342 "Preserve RuntimeInvisibleAnnotations as well " \ 1343 "as RuntimeVisibleAnnotations") \ 1344 \ 1345 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1346 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1347 \ 1348 product(bool, UseXMMForArrayCopy, false, \ 1349 "Use SSE2 MOVQ instruction for Arraycopy") \ 1350 \ 1351 product(intx, FieldsAllocationStyle, 1, \ 1352 "0 - type based with oops first, " \ 1353 "1 - with oops last, " \ 1354 "2 - oops in super and sub classes are together") \ 1355 range(0, 2) \ 1356 \ 1357 product(bool, CompactFields, true, \ 1358 "Allocate nonstatic fields in gaps between previous fields") \ 1359 \ 1360 notproduct(bool, PrintFieldLayout, false, \ 1361 "Print field layout for each class") \ 1362 \ 1363 /* Need to limit the extent of the padding to reasonable size. */\ 1364 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1365 /* aggressive prefetching, while still leaving the room for segregating */\ 1366 /* among the distinct pages. */\ 1367 product(intx, ContendedPaddingWidth, 128, \ 1368 "How many bytes to pad the fields/classes marked @Contended with")\ 1369 range(0, 8192) \ 1370 constraint(ContendedPaddingWidthConstraintFunc,AtParse) \ 1371 \ 1372 product(bool, EnableContended, true, \ 1373 "Enable @Contended annotation support") \ 1374 \ 1375 product(bool, RestrictContended, true, \ 1376 "Restrict @Contended to trusted classes") \ 1377 \ 1378 product(bool, UseBiasedLocking, true, \ 1379 "Enable biased locking in JVM") \ 1380 \ 1381 product(intx, BiasedLockingStartupDelay, 4000, \ 1382 "Number of milliseconds to wait before enabling biased locking") \ 1383 \ 1384 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1385 "Print statistics of biased locking in JVM") \ 1386 \ 1387 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1388 "Threshold of number of revocations per type to try to " \ 1389 "rebias all objects in the heap of that type") \ 1390 \ 1391 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1392 "Threshold of number of revocations per type to permanently " \ 1393 "revoke biases of all objects in the heap of that type") \ 1394 \ 1395 product(intx, BiasedLockingDecayTime, 25000, \ 1396 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1397 "type after previous bulk rebias") \ 1398 \ 1399 /* tracing */ \ 1400 \ 1401 notproduct(bool, TraceRuntimeCalls, false, \ 1402 "Trace run-time calls") \ 1403 \ 1404 develop(bool, TraceJNICalls, false, \ 1405 "Trace JNI calls") \ 1406 \ 1407 develop(bool, StressRewriter, false, \ 1408 "Stress linktime bytecode rewriting") \ 1409 \ 1410 notproduct(bool, TraceJVMCalls, false, \ 1411 "Trace JVM calls") \ 1412 \ 1413 product(ccstr, TraceJVMTI, NULL, \ 1414 "Trace flags for JVMTI functions and events") \ 1415 \ 1416 /* This option can change an EMCP method into an obsolete method. */ \ 1417 /* This can affect tests that except specific methods to be EMCP. */ \ 1418 /* This option should be used with caution. */ \ 1419 product(bool, StressLdcRewrite, false, \ 1420 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1421 \ 1422 product(intx, TraceRedefineClasses, 0, \ 1423 "Trace level for JVMTI RedefineClasses") \ 1424 \ 1425 /* change to false by default sometime after Mustang */ \ 1426 product(bool, VerifyMergedCPBytecodes, true, \ 1427 "Verify bytecodes after RedefineClasses constant pool merging") \ 1428 \ 1429 develop(bool, TraceJNIHandleAllocation, false, \ 1430 "Trace allocation/deallocation of JNI handle blocks") \ 1431 \ 1432 develop(bool, TraceBytecodes, false, \ 1433 "Trace bytecode execution") \ 1434 \ 1435 develop(bool, TraceClassInitialization, false, \ 1436 "Trace class initialization") \ 1437 \ 1438 product(bool, TraceExceptions, false, \ 1439 "Trace exceptions") \ 1440 \ 1441 develop(bool, TraceICs, false, \ 1442 "Trace inline cache changes") \ 1443 \ 1444 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1445 "Trace method invocation counter overflow") \ 1446 \ 1447 develop(bool, TraceInlineCacheClearing, false, \ 1448 "Trace clearing of inline caches in nmethods") \ 1449 \ 1450 develop(bool, TraceDependencies, false, \ 1451 "Trace dependencies") \ 1452 \ 1453 develop(bool, VerifyDependencies, trueInDebug, \ 1454 "Exercise and verify the compilation dependency mechanism") \ 1455 \ 1456 develop(bool, TraceNewOopMapGeneration, false, \ 1457 "Trace OopMapGeneration") \ 1458 \ 1459 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1460 "Trace OopMapGeneration: print detailed cell states") \ 1461 \ 1462 develop(bool, TimeOopMap, false, \ 1463 "Time calls to GenerateOopMap::compute_map() in sum") \ 1464 \ 1465 develop(bool, TimeOopMap2, false, \ 1466 "Time calls to GenerateOopMap::compute_map() individually") \ 1467 \ 1468 develop(bool, TraceMonitorMismatch, false, \ 1469 "Trace monitor matching failures during OopMapGeneration") \ 1470 \ 1471 develop(bool, TraceOopMapRewrites, false, \ 1472 "Trace rewriting of method oops during oop map generation") \ 1473 \ 1474 develop(bool, TraceSafepoint, false, \ 1475 "Trace safepoint operations") \ 1476 \ 1477 develop(bool, TraceICBuffer, false, \ 1478 "Trace usage of IC buffer") \ 1479 \ 1480 develop(bool, TraceCompiledIC, false, \ 1481 "Trace changes of compiled IC") \ 1482 \ 1483 develop(bool, TraceStartupTime, false, \ 1484 "Trace setup time") \ 1485 \ 1486 develop(bool, TraceProtectionDomainVerification, false, \ 1487 "Trace protection domain verification") \ 1488 \ 1489 develop(bool, TraceClearedExceptions, false, \ 1490 "Print when an exception is forcibly cleared") \ 1491 \ 1492 product(bool, TraceClassResolution, false, \ 1493 "Trace all constant pool resolutions (for debugging)") \ 1494 \ 1495 product(bool, TraceBiasedLocking, false, \ 1496 "Trace biased locking in JVM") \ 1497 \ 1498 product(bool, TraceMonitorInflation, false, \ 1499 "Trace monitor inflation in JVM") \ 1500 \ 1501 /* gc */ \ 1502 \ 1503 product(bool, UseSerialGC, false, \ 1504 "Use the Serial garbage collector") \ 1505 \ 1506 product(bool, UseG1GC, false, \ 1507 "Use the Garbage-First garbage collector") \ 1508 \ 1509 product(bool, UseParallelGC, false, \ 1510 "Use the Parallel Scavenge garbage collector") \ 1511 \ 1512 product(bool, UseParallelOldGC, false, \ 1513 "Use the Parallel Old garbage collector") \ 1514 \ 1515 product(uintx, HeapMaximumCompactionInterval, 20, \ 1516 "How often should we maximally compact the heap (not allowing " \ 1517 "any dead space)") \ 1518 \ 1519 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1520 "The collection count for the first maximum compaction") \ 1521 \ 1522 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1523 "Use maximum compaction in the Parallel Old garbage collector " \ 1524 "for a system GC") \ 1525 \ 1526 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1527 "The mean used by the parallel compact dead wood " \ 1528 "limiter (a number between 0-100)") \ 1529 range(0, 100) \ 1530 \ 1531 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1532 "The standard deviation used by the parallel compact dead wood " \ 1533 "limiter (a number between 0-100)") \ 1534 range(0, 100) \ 1535 \ 1536 product(uint, ParallelGCThreads, 0, \ 1537 "Number of parallel threads parallel gc will use") \ 1538 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1539 \ 1540 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1541 "Use semaphore synchronization for the GC Threads, " \ 1542 "instead of synchronization based on mutexes") \ 1543 \ 1544 product(bool, UseDynamicNumberOfGCThreads, false, \ 1545 "Dynamically choose the number of parallel threads " \ 1546 "parallel gc will use") \ 1547 \ 1548 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1549 "Force dynamic selection of the number of " \ 1550 "parallel threads parallel gc will use to aid debugging") \ 1551 \ 1552 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1553 "Size of heap (bytes) per GC thread used in calculating the " \ 1554 "number of GC threads") \ 1555 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1556 \ 1557 product(bool, TraceDynamicGCThreads, false, \ 1558 "Trace the dynamic GC thread usage") \ 1559 \ 1560 develop(bool, ParallelOldGCSplitALot, false, \ 1561 "Provoke splitting (copying data from a young gen space to " \ 1562 "multiple destination spaces)") \ 1563 \ 1564 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1565 "How often to provoke splitting a young gen space") \ 1566 range(0, max_uintx) \ 1567 \ 1568 product(uint, ConcGCThreads, 0, \ 1569 "Number of threads concurrent gc will use") \ 1570 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1571 \ 1572 product(uintx, GCTaskTimeStampEntries, 200, \ 1573 "Number of time stamp entries per gc worker thread") \ 1574 range(1, max_uintx) \ 1575 \ 1576 product(bool, AlwaysTenure, false, \ 1577 "Always tenure objects in eden (ParallelGC only)") \ 1578 \ 1579 product(bool, NeverTenure, false, \ 1580 "Never tenure objects in eden, may tenure on overflow " \ 1581 "(ParallelGC only)") \ 1582 \ 1583 product(bool, ScavengeBeforeFullGC, true, \ 1584 "Scavenge youngest generation before each full GC.") \ 1585 \ 1586 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1587 "Allow scavenges to occur when to-space contains objects") \ 1588 \ 1589 product(bool, UseConcMarkSweepGC, false, \ 1590 "Use Concurrent Mark-Sweep GC in the old generation") \ 1591 \ 1592 product(bool, ExplicitGCInvokesConcurrent, false, \ 1593 "A System.gc() request invokes a concurrent collection; " \ 1594 "(effective only when using concurrent collectors)") \ 1595 \ 1596 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1597 "A System.gc() request invokes a concurrent collection and " \ 1598 "also unloads classes during such a concurrent gc cycle " \ 1599 "(effective only when UseConcMarkSweepGC)") \ 1600 \ 1601 product(bool, GCLockerInvokesConcurrent, false, \ 1602 "The exit of a JNI critical section necessitating a scavenge, " \ 1603 "also kicks off a background concurrent collection") \ 1604 \ 1605 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1606 "How much the GC can expand the eden by while the GC locker " \ 1607 "is active (as a percentage)") \ 1608 range(0, 100) \ 1609 \ 1610 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1611 "Number of times to retry allocations when " \ 1612 "blocked by the GC locker") \ 1613 \ 1614 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1615 "Use adaptive free lists in the CMS generation") \ 1616 \ 1617 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1618 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1619 \ 1620 product(bool, UseCMSBestFit, true, \ 1621 "Use CMS best fit allocation strategy") \ 1622 \ 1623 product(bool, UseParNewGC, false, \ 1624 "Use parallel threads in the new generation") \ 1625 \ 1626 product(bool, PrintTaskqueue, false, \ 1627 "Print taskqueue statistics for parallel collectors") \ 1628 \ 1629 product(bool, PrintTerminationStats, false, \ 1630 "Print termination statistics for parallel collectors") \ 1631 \ 1632 product(uintx, ParallelGCBufferWastePct, 10, \ 1633 "Wasted fraction of parallel allocation buffer") \ 1634 range(0, 100) \ 1635 \ 1636 product(uintx, TargetPLABWastePct, 10, \ 1637 "Target wasted space in last buffer as percent of overall " \ 1638 "allocation") \ 1639 range(1, 100) \ 1640 \ 1641 product(uintx, PLABWeight, 75, \ 1642 "Percentage (0-100) used to weight the current sample when " \ 1643 "computing exponentially decaying average for ResizePLAB") \ 1644 range(0, 100) \ 1645 \ 1646 product(bool, ResizePLAB, true, \ 1647 "Dynamically resize (survivor space) promotion LAB's") \ 1648 \ 1649 product(bool, PrintPLAB, false, \ 1650 "Print (survivor space) promotion LAB's sizing decisions") \ 1651 \ 1652 product(intx, ParGCArrayScanChunk, 50, \ 1653 "Scan a subset of object array and push remainder, if array is " \ 1654 "bigger than this") \ 1655 range(1, max_intx) \ 1656 \ 1657 product(bool, ParGCUseLocalOverflow, false, \ 1658 "Instead of a global overflow list, use local overflow stacks") \ 1659 \ 1660 product(bool, ParGCTrimOverflow, true, \ 1661 "Eagerly trim the local overflow lists " \ 1662 "(when ParGCUseLocalOverflow)") \ 1663 \ 1664 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1665 "Simulate work queue overflow in ParNew") \ 1666 \ 1667 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1668 "An `interval' counter that determines how frequently " \ 1669 "we simulate overflow; a smaller number increases frequency") \ 1670 \ 1671 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1672 "The desired number of objects to claim from the overflow list") \ 1673 \ 1674 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1675 "The number of strides per worker thread that we divide up the " \ 1676 "card table scanning work into") \ 1677 range(1, max_uintx) \ 1678 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1679 \ 1680 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1681 "The number of cards in each chunk of the parallel chunks used " \ 1682 "during card table scanning") \ 1683 range(1, max_intx) \ 1684 \ 1685 product(uintx, OldPLABWeight, 50, \ 1686 "Percentage (0-100) used to weight the current sample when " \ 1687 "computing exponentially decaying average for resizing " \ 1688 "OldPLABSize") \ 1689 range(0, 100) \ 1690 \ 1691 product(bool, ResizeOldPLAB, true, \ 1692 "Dynamically resize (old gen) promotion LAB's") \ 1693 \ 1694 product(bool, PrintOldPLAB, false, \ 1695 "Print (old gen) promotion LAB's sizing decisions") \ 1696 \ 1697 product(size_t, CMSOldPLABMax, 1024, \ 1698 "Maximum size of CMS gen promotion LAB caches per worker " \ 1699 "per block size") \ 1700 range(1, max_uintx) \ 1701 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1702 \ 1703 product(size_t, CMSOldPLABMin, 16, \ 1704 "Minimum size of CMS gen promotion LAB caches per worker " \ 1705 "per block size") \ 1706 range(1, max_uintx) \ 1707 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1708 \ 1709 product(uintx, CMSOldPLABNumRefills, 4, \ 1710 "Nominal number of refills of CMS gen promotion LAB cache " \ 1711 "per worker per block size") \ 1712 range(1, max_uintx) \ 1713 \ 1714 product(bool, CMSOldPLABResizeQuicker, false, \ 1715 "React on-the-fly during a scavenge to a sudden " \ 1716 "change in block demand rate") \ 1717 \ 1718 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1719 "The tolerance of the phase-change detector for on-the-fly " \ 1720 "PLAB resizing during a scavenge") \ 1721 range(1, max_uintx) \ 1722 \ 1723 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1724 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1725 "during a scavenge") \ 1726 \ 1727 product(bool, AlwaysPreTouch, false, \ 1728 "Force all freshly committed pages to be pre-touched") \ 1729 \ 1730 product_pd(size_t, CMSYoungGenPerWorker, \ 1731 "The maximum size of young gen chosen by default per GC worker " \ 1732 "thread available") \ 1733 range(1, max_uintx) \ 1734 \ 1735 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1736 "Percentage (0-100) used to add conservatism when computing the " \ 1737 "duty cycle") \ 1738 range(0, 100) \ 1739 \ 1740 product(uintx, CMSExpAvgFactor, 50, \ 1741 "Percentage (0-100) used to weight the current sample when " \ 1742 "computing exponential averages for CMS statistics") \ 1743 range(0, 100) \ 1744 \ 1745 product(uintx, CMS_FLSWeight, 75, \ 1746 "Percentage (0-100) used to weight the current sample when " \ 1747 "computing exponentially decaying averages for CMS FLS " \ 1748 "statistics") \ 1749 range(0, 100) \ 1750 \ 1751 product(uintx, CMS_FLSPadding, 1, \ 1752 "The multiple of deviation from mean to use for buffering " \ 1753 "against volatility in free list demand") \ 1754 \ 1755 product(uintx, FLSCoalescePolicy, 2, \ 1756 "CMS: aggressiveness level for coalescing, increasing " \ 1757 "from 0 to 4") \ 1758 range(0, 4) \ 1759 \ 1760 product(bool, FLSAlwaysCoalesceLarge, false, \ 1761 "CMS: larger free blocks are always available for coalescing") \ 1762 \ 1763 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1764 "CMS: the smaller the percentage the greater the coalescing " \ 1765 "force") \ 1766 range(0.0, 1.0) \ 1767 \ 1768 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1769 "CMS: the factor by which to inflate estimated demand of small " \ 1770 "block sizes to prevent coalescing with an adjoining block") \ 1771 range(0.0, DBL_MAX) \ 1772 \ 1773 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1774 "CMS: the factor by which to inflate estimated demand of large " \ 1775 "block sizes to prevent coalescing with an adjoining block") \ 1776 range(0.0, DBL_MAX) \ 1777 \ 1778 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1779 "CMS: the factor by which to inflate estimated demand of small " \ 1780 "block sizes to prevent splitting to supply demand for smaller " \ 1781 "blocks") \ 1782 range(0.0, DBL_MAX) \ 1783 \ 1784 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1785 "CMS: the factor by which to inflate estimated demand of large " \ 1786 "block sizes to prevent splitting to supply demand for smaller " \ 1787 "blocks") \ 1788 range(0.0, DBL_MAX) \ 1789 \ 1790 product(bool, CMSExtrapolateSweep, false, \ 1791 "CMS: cushion for block demand during sweep") \ 1792 \ 1793 product(uintx, CMS_SweepWeight, 75, \ 1794 "Percentage (0-100) used to weight the current sample when " \ 1795 "computing exponentially decaying average for inter-sweep " \ 1796 "duration") \ 1797 range(0, 100) \ 1798 \ 1799 product(uintx, CMS_SweepPadding, 1, \ 1800 "The multiple of deviation from mean to use for buffering " \ 1801 "against volatility in inter-sweep duration") \ 1802 \ 1803 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1804 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1805 "duration exceeds this threshold in milliseconds") \ 1806 \ 1807 product(bool, CMSClassUnloadingEnabled, true, \ 1808 "Whether class unloading enabled when using CMS GC") \ 1809 \ 1810 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1811 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1812 "count for which classes may not be unloaded") \ 1813 \ 1814 develop(intx, CMSDictionaryChoice, 0, \ 1815 "Use BinaryTreeDictionary as default in the CMS generation") \ 1816 range(0, 2) \ 1817 \ 1818 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1819 "Replenish an indexed free list with this number of chunks") \ 1820 range(1, max_uintx) \ 1821 \ 1822 product(bool, CMSReplenishIntermediate, true, \ 1823 "Replenish all intermediate free-list caches") \ 1824 \ 1825 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1826 "When satisfying batched demand, split blocks from the " \ 1827 "IndexedFreeList whose size is a multiple of requested size") \ 1828 \ 1829 product(bool, CMSLoopWarn, false, \ 1830 "Warn in case of excessive CMS looping") \ 1831 \ 1832 develop(bool, CMSOverflowEarlyRestoration, false, \ 1833 "Restore preserved marks early") \ 1834 \ 1835 /* where does the range max value of (max_jint - 1) come from? */ \ 1836 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1837 "Maximum size of marking stack") \ 1838 range(1, (max_jint - 1)) \ 1839 \ 1840 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1841 "Size of marking stack") \ 1842 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1843 \ 1844 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1845 "Simulate frequent marking stack / work queue overflow") \ 1846 \ 1847 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1848 "An \"interval\" counter that determines how frequently " \ 1849 "to simulate overflow; a smaller number increases frequency") \ 1850 \ 1851 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1852 "Maximum number of abortable preclean iterations, if > 0") \ 1853 \ 1854 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1855 "Maximum time in abortable preclean (in milliseconds)") \ 1856 range(0, max_intx) \ 1857 \ 1858 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1859 "Nominal minimum work per abortable preclean iteration") \ 1860 \ 1861 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1862 "Time that we sleep between iterations when not given " \ 1863 "enough work per iteration") \ 1864 range(0, max_intx) \ 1865 \ 1866 product(size_t, CMSRescanMultiple, 32, \ 1867 "Size (in cards) of CMS parallel rescan task") \ 1868 range(1, max_uintx) \ 1869 \ 1870 product(size_t, CMSConcMarkMultiple, 32, \ 1871 "Size (in cards) of CMS concurrent MT marking task") \ 1872 range(1, max_uintx) \ 1873 \ 1874 product(bool, CMSAbortSemantics, false, \ 1875 "Whether abort-on-overflow semantics is implemented") \ 1876 \ 1877 product(bool, CMSParallelInitialMarkEnabled, true, \ 1878 "Use the parallel initial mark.") \ 1879 \ 1880 product(bool, CMSParallelRemarkEnabled, true, \ 1881 "Whether parallel remark enabled (only if ParNewGC)") \ 1882 \ 1883 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1884 "Whether parallel remark of survivor space " \ 1885 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1886 \ 1887 product(bool, CMSPLABRecordAlways, true, \ 1888 "Always record survivor space PLAB boundaries (effective only " \ 1889 "if CMSParallelSurvivorRemarkEnabled)") \ 1890 \ 1891 product(bool, CMSEdenChunksRecordAlways, true, \ 1892 "Always record eden chunks used for the parallel initial mark " \ 1893 "or remark of eden") \ 1894 \ 1895 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1896 "Print the eden and the survivor chunks used for the parallel " \ 1897 "initial mark or remark of the eden/survivor spaces") \ 1898 \ 1899 product(bool, CMSConcurrentMTEnabled, true, \ 1900 "Whether multi-threaded concurrent work enabled " \ 1901 "(effective only if ParNewGC)") \ 1902 \ 1903 product(bool, CMSPrecleaningEnabled, true, \ 1904 "Whether concurrent precleaning enabled") \ 1905 \ 1906 product(uintx, CMSPrecleanIter, 3, \ 1907 "Maximum number of precleaning iteration passes") \ 1908 range(0, 9) \ 1909 \ 1910 product(uintx, CMSPrecleanDenominator, 3, \ 1911 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1912 "ratio") \ 1913 range(1, max_uintx) \ 1914 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1915 \ 1916 product(uintx, CMSPrecleanNumerator, 2, \ 1917 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1918 "ratio") \ 1919 range(0, max_uintx-1) \ 1920 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1921 \ 1922 product(bool, CMSPrecleanRefLists1, true, \ 1923 "Preclean ref lists during (initial) preclean phase") \ 1924 \ 1925 product(bool, CMSPrecleanRefLists2, false, \ 1926 "Preclean ref lists during abortable preclean phase") \ 1927 \ 1928 product(bool, CMSPrecleanSurvivors1, false, \ 1929 "Preclean survivors during (initial) preclean phase") \ 1930 \ 1931 product(bool, CMSPrecleanSurvivors2, true, \ 1932 "Preclean survivors during abortable preclean phase") \ 1933 \ 1934 product(uintx, CMSPrecleanThreshold, 1000, \ 1935 "Do not iterate again if number of dirty cards is less than this")\ 1936 range(100, max_uintx) \ 1937 \ 1938 product(bool, CMSCleanOnEnter, true, \ 1939 "Clean-on-enter optimization for reducing number of dirty cards") \ 1940 \ 1941 product(uintx, CMSRemarkVerifyVariant, 1, \ 1942 "Choose variant (1,2) of verification following remark") \ 1943 range(1, 2) \ 1944 \ 1945 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1946 "If Eden size is below this, do not try to schedule remark") \ 1947 \ 1948 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1949 "The Eden occupancy percentage (0-100) at which " \ 1950 "to try and schedule remark pause") \ 1951 range(0, 100) \ 1952 \ 1953 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1954 "Start sampling eden top at least before young gen " \ 1955 "occupancy reaches 1/<ratio> of the size at which " \ 1956 "we plan to schedule remark") \ 1957 range(1, max_uintx) \ 1958 \ 1959 product(uintx, CMSSamplingGrain, 16*K, \ 1960 "The minimum distance between eden samples for CMS (see above)") \ 1961 range(1, max_uintx) \ 1962 \ 1963 product(bool, CMSScavengeBeforeRemark, false, \ 1964 "Attempt scavenge before the CMS remark step") \ 1965 \ 1966 develop(bool, CMSTraceSweeper, false, \ 1967 "Trace some actions of the CMS sweeper") \ 1968 \ 1969 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1970 "Don't drain below this size per parallel worker/thief") \ 1971 range(1, max_juint) \ 1972 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1973 \ 1974 manageable(intx, CMSWaitDuration, 2000, \ 1975 "Time in milliseconds that CMS thread waits for young GC") \ 1976 \ 1977 develop(uintx, CMSCheckInterval, 1000, \ 1978 "Interval in milliseconds that CMS thread checks if it " \ 1979 "should start a collection cycle") \ 1980 \ 1981 product(bool, CMSYield, true, \ 1982 "Yield between steps of CMS") \ 1983 \ 1984 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1985 "Bitmap operations should process at most this many bits " \ 1986 "between yields") \ 1987 range(1, max_uintx) \ 1988 \ 1989 product(bool, CMSDumpAtPromotionFailure, false, \ 1990 "Dump useful information about the state of the CMS old " \ 1991 "generation upon a promotion failure") \ 1992 \ 1993 product(bool, CMSPrintChunksInDump, false, \ 1994 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1995 "more detailed information about the free chunks") \ 1996 \ 1997 product(bool, CMSPrintObjectsInDump, false, \ 1998 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1999 "more detailed information about the allocated objects") \ 2000 \ 2001 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 2002 "Verify that all references across the FLS boundary " \ 2003 "are to valid objects") \ 2004 \ 2005 diagnostic(bool, FLSVerifyLists, false, \ 2006 "Do lots of (expensive) FreeListSpace verification") \ 2007 \ 2008 diagnostic(bool, FLSVerifyIndexTable, false, \ 2009 "Do lots of (expensive) FLS index table verification") \ 2010 \ 2011 develop(bool, FLSVerifyDictionary, false, \ 2012 "Do lots of (expensive) FLS dictionary verification") \ 2013 \ 2014 develop(bool, VerifyBlockOffsetArray, false, \ 2015 "Do (expensive) block offset array verification") \ 2016 \ 2017 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2018 "Maintain _unallocated_block in BlockOffsetArray " \ 2019 "(currently applicable only to CMS collector)") \ 2020 \ 2021 develop(bool, TraceCMSState, false, \ 2022 "Trace the state of the CMS collection") \ 2023 \ 2024 product(intx, RefDiscoveryPolicy, 0, \ 2025 "Select type of reference discovery policy: " \ 2026 "reference-based(0) or referent-based(1)") \ 2027 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2028 ReferenceProcessor::DiscoveryPolicyMax) \ 2029 \ 2030 product(bool, ParallelRefProcEnabled, false, \ 2031 "Enable parallel reference processing whenever possible") \ 2032 \ 2033 product(bool, ParallelRefProcBalancingEnabled, true, \ 2034 "Enable balancing of reference processing queues") \ 2035 \ 2036 product(uintx, CMSTriggerRatio, 80, \ 2037 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2038 "allocated before a CMS collection cycle commences") \ 2039 range(0, 100) \ 2040 \ 2041 product(uintx, CMSBootstrapOccupancy, 50, \ 2042 "Percentage CMS generation occupancy at which to " \ 2043 "initiate CMS collection for bootstrapping collection stats") \ 2044 range(0, 100) \ 2045 \ 2046 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2047 "Percentage CMS generation occupancy to start a CMS collection " \ 2048 "cycle. A negative value means that CMSTriggerRatio is used") \ 2049 range(min_intx, 100) \ 2050 \ 2051 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2052 "Percentage of the (entire) heap occupancy to start a " \ 2053 "concurrent GC cycle. It is used by GCs that trigger a " \ 2054 "concurrent GC cycle based on the occupancy of the entire heap, " \ 2055 "not just one of the generations (e.g., G1). A value of 0 " \ 2056 "denotes 'do constant GC cycles'.") \ 2057 range(0, 100) \ 2058 \ 2059 manageable(intx, CMSTriggerInterval, -1, \ 2060 "Commence a CMS collection cycle (at least) every so many " \ 2061 "milliseconds (0 permanently, -1 disabled)") \ 2062 range(-1, max_intx) \ 2063 \ 2064 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2065 "Only use occupancy as a criterion for starting a CMS collection")\ 2066 \ 2067 product(uintx, CMSIsTooFullPercentage, 98, \ 2068 "An absolute ceiling above which CMS will always consider the " \ 2069 "unloading of classes when class unloading is enabled") \ 2070 range(0, 100) \ 2071 \ 2072 develop(bool, CMSTestInFreeList, false, \ 2073 "Check if the coalesced range is already in the " \ 2074 "free lists as claimed") \ 2075 \ 2076 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2077 "Check that all the garbage collected was returned to the " \ 2078 "free lists") \ 2079 \ 2080 notproduct(bool, ScavengeALot, false, \ 2081 "Force scavenge at every Nth exit from the runtime system " \ 2082 "(N=ScavengeALotInterval)") \ 2083 \ 2084 develop(bool, FullGCALot, false, \ 2085 "Force full gc at every Nth exit from the runtime system " \ 2086 "(N=FullGCALotInterval)") \ 2087 \ 2088 notproduct(bool, GCALotAtAllSafepoints, false, \ 2089 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2090 \ 2091 product(bool, PrintPromotionFailure, false, \ 2092 "Print additional diagnostic information following " \ 2093 "promotion failure") \ 2094 \ 2095 notproduct(bool, PromotionFailureALot, false, \ 2096 "Use promotion failure handling on every youngest generation " \ 2097 "collection") \ 2098 \ 2099 develop(uintx, PromotionFailureALotCount, 1000, \ 2100 "Number of promotion failures occurring at PLAB " \ 2101 "refill attempts (ParNew) or promotion attempts " \ 2102 "(other young collectors)") \ 2103 \ 2104 develop(uintx, PromotionFailureALotInterval, 5, \ 2105 "Total collections between promotion failures a lot") \ 2106 \ 2107 experimental(uintx, WorkStealingSleepMillis, 1, \ 2108 "Sleep time when sleep is used for yields") \ 2109 \ 2110 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2111 "Number of yields before a sleep is done during work stealing") \ 2112 \ 2113 experimental(uintx, WorkStealingHardSpins, 4096, \ 2114 "Number of iterations in a spin loop between checks on " \ 2115 "time out of hard spin") \ 2116 \ 2117 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2118 "Ratio of hard spins to calls to yield") \ 2119 \ 2120 develop(uintx, ObjArrayMarkingStride, 512, \ 2121 "Number of object array elements to push onto the marking stack " \ 2122 "before pushing a continuation entry") \ 2123 \ 2124 develop(bool, MetadataAllocationFailALot, false, \ 2125 "Fail metadata allocations at intervals controlled by " \ 2126 "MetadataAllocationFailALotInterval") \ 2127 \ 2128 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2129 "Metadata allocation failure a lot interval") \ 2130 \ 2131 develop(bool, TraceMetadataChunkAllocation, false, \ 2132 "Trace chunk metadata allocations") \ 2133 \ 2134 product(bool, TraceMetadataHumongousAllocation, false, \ 2135 "Trace humongous metadata allocations") \ 2136 \ 2137 develop(bool, TraceMetavirtualspaceAllocation, false, \ 2138 "Trace virtual space metadata allocations") \ 2139 \ 2140 notproduct(bool, ExecuteInternalVMTests, false, \ 2141 "Enable execution of internal VM tests") \ 2142 \ 2143 notproduct(bool, VerboseInternalVMTests, false, \ 2144 "Turn on logging for internal VM tests.") \ 2145 \ 2146 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2147 \ 2148 product_pd(bool, ResizeTLAB, \ 2149 "Dynamically resize TLAB size for threads") \ 2150 \ 2151 product(bool, ZeroTLAB, false, \ 2152 "Zero out the newly created TLAB") \ 2153 \ 2154 product(bool, FastTLABRefill, true, \ 2155 "Use fast TLAB refill code") \ 2156 \ 2157 product(bool, PrintTLAB, false, \ 2158 "Print various TLAB related information") \ 2159 \ 2160 product(bool, TLABStats, true, \ 2161 "Provide more detailed and expensive TLAB statistics " \ 2162 "(with PrintTLAB)") \ 2163 \ 2164 product_pd(bool, NeverActAsServerClassMachine, \ 2165 "Never act like a server-class machine") \ 2166 \ 2167 product(bool, AlwaysActAsServerClassMachine, false, \ 2168 "Always act like a server-class machine") \ 2169 \ 2170 product_pd(uint64_t, MaxRAM, \ 2171 "Real memory size (in bytes) used to set maximum heap size") \ 2172 \ 2173 product(size_t, ErgoHeapSizeLimit, 0, \ 2174 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2175 "MaxRAM / MaxRAMFraction") \ 2176 \ 2177 product(uintx, MaxRAMFraction, 4, \ 2178 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2179 "size") \ 2180 range(1, max_uintx) \ 2181 \ 2182 product(uintx, MinRAMFraction, 2, \ 2183 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2184 "size on systems with small physical memory size") \ 2185 range(1, max_uintx) \ 2186 \ 2187 product(uintx, InitialRAMFraction, 64, \ 2188 "Fraction (1/n) of real memory used for initial heap size") \ 2189 range(1, max_uintx) \ 2190 \ 2191 develop(uintx, MaxVirtMemFraction, 2, \ 2192 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2193 "determining maximum heap size") \ 2194 \ 2195 product(bool, UseAutoGCSelectPolicy, false, \ 2196 "Use automatic collection selection policy") \ 2197 \ 2198 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2199 "Automatic GC selection pause threshold in milliseconds") \ 2200 \ 2201 product(bool, UseAdaptiveSizePolicy, true, \ 2202 "Use adaptive generation sizing policies") \ 2203 \ 2204 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2205 "Use adaptive survivor sizing policies") \ 2206 \ 2207 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2208 "Use adaptive young-old sizing policies at minor collections") \ 2209 \ 2210 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2211 "Use adaptive young-old sizing policies at major collections") \ 2212 \ 2213 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2214 "Include statistics from System.gc() for adaptive size policy") \ 2215 \ 2216 product(bool, UseAdaptiveGCBoundary, false, \ 2217 "Allow young-old boundary to move") \ 2218 \ 2219 develop(bool, TraceAdaptiveGCBoundary, false, \ 2220 "Trace young-old boundary moves") \ 2221 \ 2222 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2223 "Resize the virtual spaces of the young or old generations") \ 2224 range(-1, 1) \ 2225 \ 2226 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2227 "Policy for changing generation size for throughput goals") \ 2228 range(0, 1) \ 2229 \ 2230 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2231 "Adjust tenured generation to achieve a minor pause goal") \ 2232 \ 2233 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2234 "Adjust young generation to achieve a major pause goal") \ 2235 \ 2236 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2237 "Number of steps where heuristics is used before data is used") \ 2238 \ 2239 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2240 "Number of collections before the adaptive sizing is started") \ 2241 \ 2242 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2243 "Collection interval for printing information; zero means never") \ 2244 \ 2245 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2246 "Use adaptive minimum footprint as a goal") \ 2247 \ 2248 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2249 "Weight given to exponential resizing, between 0 and 100") \ 2250 range(0, 100) \ 2251 \ 2252 product(uintx, AdaptiveTimeWeight, 25, \ 2253 "Weight given to time in adaptive policy, between 0 and 100") \ 2254 range(0, 100) \ 2255 \ 2256 product(uintx, PausePadding, 1, \ 2257 "How much buffer to keep for pause time") \ 2258 \ 2259 product(uintx, PromotedPadding, 3, \ 2260 "How much buffer to keep for promotion failure") \ 2261 \ 2262 product(uintx, SurvivorPadding, 3, \ 2263 "How much buffer to keep for survivor overflow") \ 2264 \ 2265 product(uintx, ThresholdTolerance, 10, \ 2266 "Allowed collection cost difference between generations") \ 2267 range(0, 100) \ 2268 \ 2269 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2270 "If collection costs are within margin, reduce both by full " \ 2271 "delta") \ 2272 \ 2273 product(uintx, YoungGenerationSizeIncrement, 20, \ 2274 "Adaptive size percentage change in young generation") \ 2275 range(0, 100) \ 2276 \ 2277 product(uintx, YoungGenerationSizeSupplement, 80, \ 2278 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2279 range(0, 100) \ 2280 \ 2281 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2282 "Decay factor to YoungedGenerationSizeSupplement") \ 2283 range(1, max_uintx) \ 2284 \ 2285 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2286 "Adaptive size percentage change in tenured generation") \ 2287 range(0, 100) \ 2288 \ 2289 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2290 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2291 range(0, 100) \ 2292 \ 2293 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2294 "Decay factor to TenuredGenerationSizeIncrement") \ 2295 range(1, max_uintx) \ 2296 \ 2297 product(uintx, MaxGCPauseMillis, max_uintx, \ 2298 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2299 "or (G1 Only) the maximum GC time per MMU time slice") \ 2300 range(1, max_uintx) \ 2301 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2302 \ 2303 product(uintx, GCPauseIntervalMillis, 0, \ 2304 "Time slice for MMU specification") \ 2305 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2306 \ 2307 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2308 "Adaptive size policy maximum GC minor pause time goal " \ 2309 "in millisecond") \ 2310 \ 2311 product(uintx, GCTimeRatio, 99, \ 2312 "Adaptive size policy application time to GC time ratio") \ 2313 \ 2314 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2315 "Adaptive size scale down factor for shrinking") \ 2316 range(1, max_uintx) \ 2317 \ 2318 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2319 "Adaptive size decays the major cost for long major intervals") \ 2320 \ 2321 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2322 "Time scale over which major costs decay") \ 2323 \ 2324 product(uintx, MinSurvivorRatio, 3, \ 2325 "Minimum ratio of young generation/survivor space size") \ 2326 range(3, max_uintx) \ 2327 \ 2328 product(uintx, InitialSurvivorRatio, 8, \ 2329 "Initial ratio of young generation/survivor space size") \ 2330 \ 2331 product(size_t, BaseFootPrintEstimate, 256*M, \ 2332 "Estimate of footprint other than Java Heap") \ 2333 \ 2334 product(bool, UseGCOverheadLimit, true, \ 2335 "Use policy to limit of proportion of time spent in GC " \ 2336 "before an OutOfMemory error is thrown") \ 2337 \ 2338 product(uintx, GCTimeLimit, 98, \ 2339 "Limit of the proportion of time spent in GC before " \ 2340 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2341 range(0, 100) \ 2342 \ 2343 product(uintx, GCHeapFreeLimit, 2, \ 2344 "Minimum percentage of free space after a full GC before an " \ 2345 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2346 range(0, 100) \ 2347 \ 2348 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2349 "Number of consecutive collections before gc time limit fires") \ 2350 range(1, max_uintx) \ 2351 \ 2352 product(bool, PrintAdaptiveSizePolicy, false, \ 2353 "Print information about AdaptiveSizePolicy") \ 2354 \ 2355 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2356 "How far ahead to prefetch destination area (<= 0 means off)") \ 2357 \ 2358 product(intx, PrefetchScanIntervalInBytes, -1, \ 2359 "How far ahead to prefetch scan area (<= 0 means off)") \ 2360 \ 2361 product(intx, PrefetchFieldsAhead, -1, \ 2362 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2363 \ 2364 diagnostic(bool, VerifySilently, false, \ 2365 "Do not print the verification progress") \ 2366 \ 2367 diagnostic(bool, VerifyDuringStartup, false, \ 2368 "Verify memory system before executing any Java code " \ 2369 "during VM initialization") \ 2370 \ 2371 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2372 "Verify system before exiting") \ 2373 \ 2374 diagnostic(bool, VerifyBeforeGC, false, \ 2375 "Verify memory system before GC") \ 2376 \ 2377 diagnostic(bool, VerifyAfterGC, false, \ 2378 "Verify memory system after GC") \ 2379 \ 2380 diagnostic(bool, VerifyDuringGC, false, \ 2381 "Verify memory system during GC (between phases)") \ 2382 \ 2383 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2384 "Enable parallel memory system verification") \ 2385 \ 2386 diagnostic(bool, DeferInitialCardMark, false, \ 2387 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2388 "may arise from new_pre_store_barrier") \ 2389 \ 2390 product(bool, UseCondCardMark, false, \ 2391 "Check for already marked card before updating card table") \ 2392 \ 2393 diagnostic(bool, VerifyRememberedSets, false, \ 2394 "Verify GC remembered sets") \ 2395 \ 2396 diagnostic(bool, VerifyObjectStartArray, true, \ 2397 "Verify GC object start array if verify before/after") \ 2398 \ 2399 product(bool, DisableExplicitGC, false, \ 2400 "Ignore calls to System.gc()") \ 2401 \ 2402 notproduct(bool, CheckMemoryInitialization, false, \ 2403 "Check memory initialization") \ 2404 \ 2405 diagnostic(bool, BindCMSThreadToCPU, false, \ 2406 "Bind CMS Thread to CPU if possible") \ 2407 \ 2408 diagnostic(uintx, CPUForCMSThread, 0, \ 2409 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2410 \ 2411 product(bool, BindGCTaskThreadsToCPUs, false, \ 2412 "Bind GCTaskThreads to CPUs if possible") \ 2413 \ 2414 product(bool, UseGCTaskAffinity, false, \ 2415 "Use worker affinity when asking for GCTasks") \ 2416 \ 2417 product(uintx, ProcessDistributionStride, 4, \ 2418 "Stride through processors when distributing processes") \ 2419 \ 2420 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2421 "Number of times the coordinator GC thread will sleep while " \ 2422 "yielding before giving up and resuming GC") \ 2423 \ 2424 product(uintx, CMSYieldSleepCount, 0, \ 2425 "Number of times a GC thread (minus the coordinator) " \ 2426 "will sleep while yielding before giving up and resuming GC") \ 2427 \ 2428 /* gc tracing */ \ 2429 manageable(bool, PrintGC, false, \ 2430 "Print message at garbage collection") \ 2431 \ 2432 manageable(bool, PrintGCDetails, false, \ 2433 "Print more details at garbage collection") \ 2434 \ 2435 manageable(bool, PrintGCDateStamps, false, \ 2436 "Print date stamps at garbage collection") \ 2437 \ 2438 manageable(bool, PrintGCTimeStamps, false, \ 2439 "Print timestamps at garbage collection") \ 2440 \ 2441 manageable(bool, PrintGCID, true, \ 2442 "Print an identifier for each garbage collection") \ 2443 \ 2444 product(bool, PrintGCTaskTimeStamps, false, \ 2445 "Print timestamps for individual gc worker thread tasks") \ 2446 \ 2447 develop(intx, ConcGCYieldTimeout, 0, \ 2448 "If non-zero, assert that GC threads yield within this " \ 2449 "number of milliseconds") \ 2450 range(0, max_intx) \ 2451 \ 2452 product(bool, PrintReferenceGC, false, \ 2453 "Print times spent handling reference objects during GC " \ 2454 "(enabled only when PrintGCDetails)") \ 2455 \ 2456 develop(bool, TraceReferenceGC, false, \ 2457 "Trace handling of soft/weak/final/phantom references") \ 2458 \ 2459 develop(bool, TraceFinalizerRegistration, false, \ 2460 "Trace registration of final references") \ 2461 \ 2462 notproduct(bool, TraceScavenge, false, \ 2463 "Trace scavenge") \ 2464 \ 2465 product(bool, IgnoreEmptyClassPaths, false, \ 2466 "Ignore empty path elements in -classpath") \ 2467 \ 2468 product(bool, TraceClassPaths, false, \ 2469 "Trace processing of class paths") \ 2470 \ 2471 product_rw(bool, TraceClassLoading, false, \ 2472 "Trace all classes loaded") \ 2473 \ 2474 product(bool, TraceClassLoadingPreorder, false, \ 2475 "Trace all classes loaded in order referenced (not loaded)") \ 2476 \ 2477 product_rw(bool, TraceClassUnloading, false, \ 2478 "Trace unloading of classes") \ 2479 \ 2480 product_rw(bool, TraceLoaderConstraints, false, \ 2481 "Trace loader constraints") \ 2482 \ 2483 develop(bool, TraceClassLoaderData, false, \ 2484 "Trace class loader loader_data lifetime") \ 2485 \ 2486 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2487 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2488 "Initial size of the boot class loader data metaspace") \ 2489 range(30*K, max_uintx/BytesPerWord) \ 2490 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2491 \ 2492 product(bool, TraceYoungGenTime, false, \ 2493 "Trace accumulated time for young collection") \ 2494 \ 2495 product(bool, TraceOldGenTime, false, \ 2496 "Trace accumulated time for old collection") \ 2497 \ 2498 product(bool, PrintTenuringDistribution, false, \ 2499 "Print tenuring age information") \ 2500 \ 2501 product_rw(bool, PrintHeapAtGC, false, \ 2502 "Print heap layout before and after each GC") \ 2503 \ 2504 product_rw(bool, PrintHeapAtGCExtended, false, \ 2505 "Print extended information about the layout of the heap " \ 2506 "when -XX:+PrintHeapAtGC is set") \ 2507 \ 2508 product(bool, PrintHeapAtSIGBREAK, true, \ 2509 "Print heap layout in response to SIGBREAK") \ 2510 \ 2511 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2512 "Print a class histogram before any major stop-world GC") \ 2513 \ 2514 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2515 "Print a class histogram after any major stop-world GC") \ 2516 \ 2517 manageable(bool, PrintClassHistogram, false, \ 2518 "Print a histogram of class instances") \ 2519 \ 2520 develop(bool, TraceWorkGang, false, \ 2521 "Trace activities of work gangs") \ 2522 \ 2523 product(bool, TraceParallelOldGCTasks, false, \ 2524 "Trace multithreaded GC activity") \ 2525 \ 2526 develop(bool, TraceBlockOffsetTable, false, \ 2527 "Print BlockOffsetTable maps") \ 2528 \ 2529 develop(bool, TraceCardTableModRefBS, false, \ 2530 "Print CardTableModRefBS maps") \ 2531 \ 2532 develop(bool, TraceGCTaskManager, false, \ 2533 "Trace actions of the GC task manager") \ 2534 \ 2535 develop(bool, TraceGCTaskQueue, false, \ 2536 "Trace actions of the GC task queues") \ 2537 \ 2538 diagnostic(bool, TraceGCTaskThread, false, \ 2539 "Trace actions of the GC task threads") \ 2540 \ 2541 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2542 "Print the time taken by each phase in ParallelOldGC " \ 2543 "(PrintGCDetails must also be enabled)") \ 2544 \ 2545 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2546 "Trace marking phase in ParallelOldGC") \ 2547 \ 2548 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2549 "Trace summary phase in ParallelOldGC") \ 2550 \ 2551 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2552 "Trace compaction phase in ParallelOldGC") \ 2553 \ 2554 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2555 "Trace dense prefix computation for ParallelOldGC") \ 2556 \ 2557 develop(bool, IgnoreLibthreadGPFault, false, \ 2558 "Suppress workaround for libthread GP fault") \ 2559 \ 2560 product(bool, PrintJNIGCStalls, false, \ 2561 "Print diagnostic message when GC is stalled " \ 2562 "by JNI critical section") \ 2563 \ 2564 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2565 "The percentage of the used heap that the instances of a class " \ 2566 "must occupy for the class to generate a trace event") \ 2567 range(0.0, 100.0) \ 2568 \ 2569 /* GC log rotation setting */ \ 2570 \ 2571 product(bool, UseGCLogFileRotation, false, \ 2572 "Rotate gclog files (for long running applications). It requires "\ 2573 "-Xloggc:<filename>") \ 2574 \ 2575 product(uintx, NumberOfGCLogFiles, 0, \ 2576 "Number of gclog files in rotation " \ 2577 "(default: 0, no rotation)") \ 2578 \ 2579 product(size_t, GCLogFileSize, 8*K, \ 2580 "GC log file size, requires UseGCLogFileRotation. " \ 2581 "Set to 0 to only trigger rotation via jcmd") \ 2582 \ 2583 /* JVMTI heap profiling */ \ 2584 \ 2585 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2586 "Trace JVMTI object tagging calls") \ 2587 \ 2588 diagnostic(bool, VerifyBeforeIteration, false, \ 2589 "Verify memory system before JVMTI iteration") \ 2590 \ 2591 /* compiler interface */ \ 2592 \ 2593 develop(bool, CIPrintCompilerName, false, \ 2594 "when CIPrint is active, print the name of the active compiler") \ 2595 \ 2596 diagnostic(bool, CIPrintCompileQueue, false, \ 2597 "display the contents of the compile queue whenever a " \ 2598 "compilation is enqueued") \ 2599 \ 2600 develop(bool, CIPrintRequests, false, \ 2601 "display every request for compilation") \ 2602 \ 2603 product(bool, CITime, false, \ 2604 "collect timing information for compilation") \ 2605 \ 2606 develop(bool, CITimeVerbose, false, \ 2607 "be more verbose in compilation timings") \ 2608 \ 2609 develop(bool, CITimeEach, false, \ 2610 "display timing information after each successful compilation") \ 2611 \ 2612 develop(bool, CICountOSR, false, \ 2613 "use a separate counter when assigning ids to osr compilations") \ 2614 \ 2615 develop(bool, CICompileNatives, true, \ 2616 "compile native methods if supported by the compiler") \ 2617 \ 2618 develop_pd(bool, CICompileOSR, \ 2619 "compile on stack replacement methods if supported by the " \ 2620 "compiler") \ 2621 \ 2622 develop(bool, CIPrintMethodCodes, false, \ 2623 "print method bytecodes of the compiled code") \ 2624 \ 2625 develop(bool, CIPrintTypeFlow, false, \ 2626 "print the results of ciTypeFlow analysis") \ 2627 \ 2628 develop(bool, CITraceTypeFlow, false, \ 2629 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2630 \ 2631 develop(intx, OSROnlyBCI, -1, \ 2632 "OSR only at this bci. Negative values mean exclude that bci") \ 2633 \ 2634 /* compiler */ \ 2635 \ 2636 /* notice: the max range value here is max_jint, not max_intx */ \ 2637 /* because of overflow issue */ \ 2638 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2639 "Number of compiler threads to run") \ 2640 range(0, max_jint) \ 2641 constraint(CICompilerCountConstraintFunc, AtParse) \ 2642 \ 2643 product(intx, CompilationPolicyChoice, 0, \ 2644 "which compilation policy (0-3)") \ 2645 range(0, 3) \ 2646 \ 2647 develop(bool, UseStackBanging, true, \ 2648 "use stack banging for stack overflow checks (required for " \ 2649 "proper StackOverflow handling; disable only to measure cost " \ 2650 "of stackbanging)") \ 2651 \ 2652 develop(bool, UseStrictFP, true, \ 2653 "use strict fp if modifier strictfp is set") \ 2654 \ 2655 develop(bool, GenerateSynchronizationCode, true, \ 2656 "generate locking/unlocking code for synchronized methods and " \ 2657 "monitors") \ 2658 \ 2659 develop(bool, GenerateCompilerNullChecks, true, \ 2660 "Generate explicit null checks for loads/stores/calls") \ 2661 \ 2662 develop(bool, GenerateRangeChecks, true, \ 2663 "Generate range checks for array accesses") \ 2664 \ 2665 develop_pd(bool, ImplicitNullChecks, \ 2666 "Generate code for implicit null checks") \ 2667 \ 2668 product_pd(bool, TrapBasedNullChecks, \ 2669 "Generate code for null checks that uses a cmp and trap " \ 2670 "instruction raising SIGTRAP. This is only used if an access to" \ 2671 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2672 "ImplicitNullChecks don't work (PPC64).") \ 2673 \ 2674 product(bool, PrintSafepointStatistics, false, \ 2675 "Print statistics about safepoint synchronization") \ 2676 \ 2677 product(intx, PrintSafepointStatisticsCount, 300, \ 2678 "Total number of safepoint statistics collected " \ 2679 "before printing them out") \ 2680 \ 2681 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2682 "Print safepoint statistics only when safepoint takes " \ 2683 "more than PrintSafepointSatisticsTimeout in millis") \ 2684 \ 2685 product(bool, TraceSafepointCleanupTime, false, \ 2686 "Print the break down of clean up tasks performed during " \ 2687 "safepoint") \ 2688 \ 2689 product(bool, Inline, true, \ 2690 "Enable inlining") \ 2691 \ 2692 product(bool, ClipInlining, true, \ 2693 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2694 \ 2695 develop(bool, UseCHA, true, \ 2696 "Enable CHA") \ 2697 \ 2698 product(bool, UseTypeProfile, true, \ 2699 "Check interpreter profile for historically monomorphic calls") \ 2700 \ 2701 diagnostic(bool, PrintInlining, false, \ 2702 "Print inlining optimizations") \ 2703 \ 2704 product(bool, UsePopCountInstruction, false, \ 2705 "Use population count instruction") \ 2706 \ 2707 develop(bool, EagerInitialization, false, \ 2708 "Eagerly initialize classes if possible") \ 2709 \ 2710 diagnostic(bool, LogTouchedMethods, false, \ 2711 "Log methods which have been ever touched in runtime") \ 2712 \ 2713 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2714 "Print all methods that have been ever touched in runtime") \ 2715 \ 2716 develop(bool, TraceMethodReplacement, false, \ 2717 "Print when methods are replaced do to recompilation") \ 2718 \ 2719 develop(bool, PrintMethodFlushing, false, \ 2720 "Print the nmethods being flushed") \ 2721 \ 2722 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2723 "print statistics about method flushing") \ 2724 \ 2725 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2726 "Number of compiled code invocations after which " \ 2727 "the method is considered as hot by the flusher") \ 2728 \ 2729 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2730 "Minimum number of sweeper passes before an nmethod " \ 2731 "can be flushed") \ 2732 \ 2733 product(bool, UseCodeAging, true, \ 2734 "Insert counter to detect warm methods") \ 2735 \ 2736 diagnostic(bool, StressCodeAging, false, \ 2737 "Start with counters compiled in") \ 2738 \ 2739 develop(bool, UseRelocIndex, false, \ 2740 "Use an index to speed random access to relocations") \ 2741 \ 2742 develop(bool, StressCodeBuffers, false, \ 2743 "Exercise code buffer expansion and other rare state changes") \ 2744 \ 2745 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2746 "Generate extra debugging information for non-safepoints in " \ 2747 "nmethods") \ 2748 \ 2749 product(bool, PrintVMOptions, false, \ 2750 "Print flags that appeared on the command line") \ 2751 \ 2752 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2753 "Ignore unrecognized VM options") \ 2754 \ 2755 product(bool, PrintCommandLineFlags, false, \ 2756 "Print flags specified on command line or set by ergonomics") \ 2757 \ 2758 product(bool, PrintFlagsInitial, false, \ 2759 "Print all VM flags before argument processing and exit VM") \ 2760 \ 2761 product(bool, PrintFlagsFinal, false, \ 2762 "Print all VM flags after argument and ergonomic processing") \ 2763 \ 2764 notproduct(bool, PrintFlagsWithComments, false, \ 2765 "Print all VM flags with default values and descriptions and " \ 2766 "exit") \ 2767 \ 2768 product(bool, PrintFlagsRanges, false, \ 2769 "Print VM flags and their ranges and exit VM") \ 2770 \ 2771 diagnostic(bool, SerializeVMOutput, true, \ 2772 "Use a mutex to serialize output to tty and LogFile") \ 2773 \ 2774 diagnostic(bool, DisplayVMOutput, true, \ 2775 "Display all VM output on the tty, independently of LogVMOutput") \ 2776 \ 2777 diagnostic(bool, LogVMOutput, false, \ 2778 "Save VM output to LogFile") \ 2779 \ 2780 diagnostic(ccstr, LogFile, NULL, \ 2781 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2782 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2783 \ 2784 product(ccstr, ErrorFile, NULL, \ 2785 "If an error occurs, save the error data to this file " \ 2786 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2787 \ 2788 product(bool, DisplayVMOutputToStderr, false, \ 2789 "If DisplayVMOutput is true, display all VM output to stderr") \ 2790 \ 2791 product(bool, DisplayVMOutputToStdout, false, \ 2792 "If DisplayVMOutput is true, display all VM output to stdout") \ 2793 \ 2794 product(bool, UseHeavyMonitors, false, \ 2795 "use heavyweight instead of lightweight Java monitors") \ 2796 \ 2797 product(bool, PrintStringTableStatistics, false, \ 2798 "print statistics about the StringTable and SymbolTable") \ 2799 \ 2800 diagnostic(bool, VerifyStringTableAtExit, false, \ 2801 "verify StringTable contents at exit") \ 2802 \ 2803 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2804 "print histogram of the symbol table") \ 2805 \ 2806 notproduct(bool, ExitVMOnVerifyError, false, \ 2807 "standard exit from VM if bytecode verify error " \ 2808 "(only in debug mode)") \ 2809 \ 2810 notproduct(ccstr, AbortVMOnException, NULL, \ 2811 "Call fatal if this exception is thrown. Example: " \ 2812 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2813 \ 2814 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2815 "Call fatal if the exception pointed by AbortVMOnException " \ 2816 "has this message") \ 2817 \ 2818 develop(bool, DebugVtables, false, \ 2819 "add debugging code to vtable dispatch") \ 2820 \ 2821 develop(bool, PrintVtables, false, \ 2822 "print vtables when printing klass") \ 2823 \ 2824 notproduct(bool, PrintVtableStats, false, \ 2825 "print vtables stats at end of run") \ 2826 \ 2827 develop(bool, TraceCreateZombies, false, \ 2828 "trace creation of zombie nmethods") \ 2829 \ 2830 notproduct(bool, IgnoreLockingAssertions, false, \ 2831 "disable locking assertions (for speed)") \ 2832 \ 2833 product(bool, RangeCheckElimination, true, \ 2834 "Eliminate range checks") \ 2835 \ 2836 develop_pd(bool, UncommonNullCast, \ 2837 "track occurrences of null in casts; adjust compiler tactics") \ 2838 \ 2839 develop(bool, TypeProfileCasts, true, \ 2840 "treat casts like calls for purposes of type profiling") \ 2841 \ 2842 develop(bool, DelayCompilationDuringStartup, true, \ 2843 "Delay invoking the compiler until main application class is " \ 2844 "loaded") \ 2845 \ 2846 develop(bool, CompileTheWorld, false, \ 2847 "Compile all methods in all classes in bootstrap class path " \ 2848 "(stress test)") \ 2849 \ 2850 develop(bool, CompileTheWorldPreloadClasses, true, \ 2851 "Preload all classes used by a class before start loading") \ 2852 \ 2853 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2854 "Force a safepoint every n compiles so sweeper can keep up") \ 2855 \ 2856 develop(bool, FillDelaySlots, true, \ 2857 "Fill delay slots (on SPARC only)") \ 2858 \ 2859 develop(bool, TimeLivenessAnalysis, false, \ 2860 "Time computation of bytecode liveness analysis") \ 2861 \ 2862 develop(bool, TraceLivenessGen, false, \ 2863 "Trace the generation of liveness analysis information") \ 2864 \ 2865 notproduct(bool, TraceLivenessQuery, false, \ 2866 "Trace queries of liveness analysis information") \ 2867 \ 2868 notproduct(bool, CollectIndexSetStatistics, false, \ 2869 "Collect information about IndexSets") \ 2870 \ 2871 develop(bool, UseLoopSafepoints, true, \ 2872 "Generate Safepoint nodes in every loop") \ 2873 \ 2874 develop(intx, FastAllocateSizeLimit, 128*K, \ 2875 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2876 "Inline allocations larger than this in doublewords must go slow")\ 2877 \ 2878 product(bool, AggressiveOpts, false, \ 2879 "Enable aggressive optimizations - see arguments.cpp") \ 2880 \ 2881 product_pd(uintx, TypeProfileLevel, \ 2882 "=XYZ, with Z: Type profiling of arguments at call; " \ 2883 "Y: Type profiling of return value at call; " \ 2884 "X: Type profiling of parameters to methods; " \ 2885 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2886 \ 2887 product(intx, TypeProfileArgsLimit, 2, \ 2888 "max number of call arguments to consider for type profiling") \ 2889 \ 2890 product(intx, TypeProfileParmsLimit, 2, \ 2891 "max number of incoming parameters to consider for type profiling"\ 2892 ", -1 for all") \ 2893 \ 2894 /* statistics */ \ 2895 develop(bool, CountCompiledCalls, false, \ 2896 "Count method invocations") \ 2897 \ 2898 notproduct(bool, CountRuntimeCalls, false, \ 2899 "Count VM runtime calls") \ 2900 \ 2901 develop(bool, CountJNICalls, false, \ 2902 "Count jni method invocations") \ 2903 \ 2904 notproduct(bool, CountJVMCalls, false, \ 2905 "Count jvm method invocations") \ 2906 \ 2907 notproduct(bool, CountRemovableExceptions, false, \ 2908 "Count exceptions that could be replaced by branches due to " \ 2909 "inlining") \ 2910 \ 2911 notproduct(bool, ICMissHistogram, false, \ 2912 "Produce histogram of IC misses") \ 2913 \ 2914 /* interpreter */ \ 2915 develop(bool, ClearInterpreterLocals, false, \ 2916 "Always clear local variables of interpreter activations upon " \ 2917 "entry") \ 2918 \ 2919 product_pd(bool, RewriteBytecodes, \ 2920 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2921 \ 2922 product_pd(bool, RewriteFrequentPairs, \ 2923 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2924 \ 2925 diagnostic(bool, PrintInterpreter, false, \ 2926 "Print the generated interpreter code") \ 2927 \ 2928 product(bool, UseInterpreter, true, \ 2929 "Use interpreter for non-compiled methods") \ 2930 \ 2931 develop(bool, UseFastSignatureHandlers, true, \ 2932 "Use fast signature handlers for native calls") \ 2933 \ 2934 product(bool, UseLoopCounter, true, \ 2935 "Increment invocation counter on backward branch") \ 2936 \ 2937 product_pd(bool, UseOnStackReplacement, \ 2938 "Use on stack replacement, calls runtime if invoc. counter " \ 2939 "overflows in loop") \ 2940 \ 2941 notproduct(bool, TraceOnStackReplacement, false, \ 2942 "Trace on stack replacement") \ 2943 \ 2944 product_pd(bool, PreferInterpreterNativeStubs, \ 2945 "Use always interpreter stubs for native methods invoked via " \ 2946 "interpreter") \ 2947 \ 2948 develop(bool, CountBytecodes, false, \ 2949 "Count number of bytecodes executed") \ 2950 \ 2951 develop(bool, PrintBytecodeHistogram, false, \ 2952 "Print histogram of the executed bytecodes") \ 2953 \ 2954 develop(bool, PrintBytecodePairHistogram, false, \ 2955 "Print histogram of the executed bytecode pairs") \ 2956 \ 2957 diagnostic(bool, PrintSignatureHandlers, false, \ 2958 "Print code generated for native method signature handlers") \ 2959 \ 2960 develop(bool, VerifyOops, false, \ 2961 "Do plausibility checks for oops") \ 2962 \ 2963 develop(bool, CheckUnhandledOops, false, \ 2964 "Check for unhandled oops in VM code") \ 2965 \ 2966 develop(bool, VerifyJNIFields, trueInDebug, \ 2967 "Verify jfieldIDs for instance fields") \ 2968 \ 2969 notproduct(bool, VerifyJNIEnvThread, false, \ 2970 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2971 "from JNI") \ 2972 \ 2973 develop(bool, VerifyFPU, false, \ 2974 "Verify FPU state (check for NaN's, etc.)") \ 2975 \ 2976 develop(bool, VerifyThread, false, \ 2977 "Watch the thread register for corruption (SPARC only)") \ 2978 \ 2979 develop(bool, VerifyActivationFrameSize, false, \ 2980 "Verify that activation frame didn't become smaller than its " \ 2981 "minimal size") \ 2982 \ 2983 develop(bool, TraceFrequencyInlining, false, \ 2984 "Trace frequency based inlining") \ 2985 \ 2986 develop_pd(bool, InlineIntrinsics, \ 2987 "Inline intrinsics that can be statically resolved") \ 2988 \ 2989 product_pd(bool, ProfileInterpreter, \ 2990 "Profile at the bytecode level during interpretation") \ 2991 \ 2992 develop(bool, TraceProfileInterpreter, false, \ 2993 "Trace profiling at the bytecode level during interpretation. " \ 2994 "This outputs the profiling information collected to improve " \ 2995 "jit compilation.") \ 2996 \ 2997 develop_pd(bool, ProfileTraps, \ 2998 "Profile deoptimization traps at the bytecode level") \ 2999 \ 3000 product(intx, ProfileMaturityPercentage, 20, \ 3001 "number of method invocations/branches (expressed as % of " \ 3002 "CompileThreshold) before using the method's profile") \ 3003 range(0, 100) \ 3004 \ 3005 diagnostic(bool, PrintMethodData, false, \ 3006 "Print the results of +ProfileInterpreter at end of run") \ 3007 \ 3008 develop(bool, VerifyDataPointer, trueInDebug, \ 3009 "Verify the method data pointer during interpreter profiling") \ 3010 \ 3011 develop(bool, VerifyCompiledCode, false, \ 3012 "Include miscellaneous runtime verifications in nmethod code; " \ 3013 "default off because it disturbs nmethod size heuristics") \ 3014 \ 3015 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 3016 "Manually make GC thread crash then dump java stack trace; " \ 3017 "Test only") \ 3018 \ 3019 /* compilation */ \ 3020 product(bool, UseCompiler, true, \ 3021 "Use Just-In-Time compilation") \ 3022 \ 3023 develop(bool, TraceCompilationPolicy, false, \ 3024 "Trace compilation policy") \ 3025 \ 3026 develop(bool, TimeCompilationPolicy, false, \ 3027 "Time the compilation policy") \ 3028 \ 3029 product(bool, UseCounterDecay, true, \ 3030 "Adjust recompilation counters") \ 3031 \ 3032 develop(intx, CounterHalfLifeTime, 30, \ 3033 "Half-life time of invocation counters (in seconds)") \ 3034 \ 3035 develop(intx, CounterDecayMinIntervalLength, 500, \ 3036 "The minimum interval (in milliseconds) between invocation of " \ 3037 "CounterDecay") \ 3038 \ 3039 product(bool, AlwaysCompileLoopMethods, false, \ 3040 "When using recompilation, never interpret methods " \ 3041 "containing loops") \ 3042 \ 3043 product(bool, DontCompileHugeMethods, true, \ 3044 "Do not compile methods > HugeMethodLimit") \ 3045 \ 3046 /* Bytecode escape analysis estimation. */ \ 3047 product(bool, EstimateArgEscape, true, \ 3048 "Analyze bytecodes to estimate escape state of arguments") \ 3049 \ 3050 product(intx, BCEATraceLevel, 0, \ 3051 "How much tracing to do of bytecode escape analysis estimates") \ 3052 \ 3053 product(intx, MaxBCEAEstimateLevel, 5, \ 3054 "Maximum number of nested calls that are analyzed by BC EA") \ 3055 \ 3056 product(intx, MaxBCEAEstimateSize, 150, \ 3057 "Maximum bytecode size of a method to be analyzed by BC EA") \ 3058 \ 3059 product(intx, AllocatePrefetchStyle, 1, \ 3060 "0 = no prefetch, " \ 3061 "1 = prefetch instructions for each allocation, " \ 3062 "2 = use TLAB watermark to gate allocation prefetch, " \ 3063 "3 = use BIS instruction on Sparc for allocation prefetch") \ 3064 range(0, 3) \ 3065 \ 3066 product(intx, AllocatePrefetchDistance, -1, \ 3067 "Distance to prefetch ahead of allocation pointer") \ 3068 \ 3069 product(intx, AllocatePrefetchLines, 3, \ 3070 "Number of lines to prefetch ahead of array allocation pointer") \ 3071 \ 3072 product(intx, AllocateInstancePrefetchLines, 1, \ 3073 "Number of lines to prefetch ahead of instance allocation " \ 3074 "pointer") \ 3075 \ 3076 product(intx, AllocatePrefetchStepSize, 16, \ 3077 "Step size in bytes of sequential prefetch instructions") \ 3078 \ 3079 product(intx, AllocatePrefetchInstr, 0, \ 3080 "Prefetch instruction to prefetch ahead of allocation pointer") \ 3081 \ 3082 /* deoptimization */ \ 3083 develop(bool, TraceDeoptimization, false, \ 3084 "Trace deoptimization") \ 3085 \ 3086 develop(bool, DebugDeoptimization, false, \ 3087 "Tracing various information while debugging deoptimization") \ 3088 \ 3089 product(intx, SelfDestructTimer, 0, \ 3090 "Will cause VM to terminate after a given time (in minutes) " \ 3091 "(0 means off)") \ 3092 \ 3093 product(intx, MaxJavaStackTraceDepth, 1024, \ 3094 "The maximum number of lines in the stack trace for Java " \ 3095 "exceptions (0 means all)") \ 3096 \ 3097 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3098 "Guarantee a safepoint (at least) every so many milliseconds " \ 3099 "(0 means none)")) \ 3100 \ 3101 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3102 "Guarantee a safepoint (at least) every so many milliseconds " \ 3103 "(0 means none)")) \ 3104 \ 3105 product(intx, SafepointTimeoutDelay, 10000, \ 3106 "Delay in milliseconds for option SafepointTimeout") \ 3107 \ 3108 product(intx, NmethodSweepActivity, 10, \ 3109 "Removes cold nmethods from code cache if > 0. Higher values " \ 3110 "result in more aggressive sweeping") \ 3111 range(0, 2000) \ 3112 \ 3113 notproduct(bool, LogSweeper, false, \ 3114 "Keep a ring buffer of sweeper activity") \ 3115 \ 3116 notproduct(intx, SweeperLogEntries, 1024, \ 3117 "Number of records in the ring buffer of sweeper activity") \ 3118 \ 3119 notproduct(intx, MemProfilingInterval, 500, \ 3120 "Time between each invocation of the MemProfiler") \ 3121 \ 3122 develop(intx, MallocCatchPtr, -1, \ 3123 "Hit breakpoint when mallocing/freeing this pointer") \ 3124 \ 3125 notproduct(ccstrlist, SuppressErrorAt, "", \ 3126 "List of assertions (file:line) to muzzle") \ 3127 \ 3128 notproduct(size_t, HandleAllocationLimit, 1024, \ 3129 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3130 "is used") \ 3131 \ 3132 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3133 "Threshold for total handle allocation when " \ 3134 "+TraceHandleAllocation is used") \ 3135 \ 3136 develop(intx, StackPrintLimit, 100, \ 3137 "number of stack frames to print in VM-level stack dump") \ 3138 \ 3139 notproduct(intx, MaxElementPrintSize, 256, \ 3140 "maximum number of elements to print") \ 3141 \ 3142 notproduct(intx, MaxSubklassPrintSize, 4, \ 3143 "maximum number of subklasses to print when printing klass") \ 3144 \ 3145 product(intx, MaxInlineLevel, 9, \ 3146 "maximum number of nested calls that are inlined") \ 3147 \ 3148 product(intx, MaxRecursiveInlineLevel, 1, \ 3149 "maximum number of nested recursive calls that are inlined") \ 3150 \ 3151 develop(intx, MaxForceInlineLevel, 100, \ 3152 "maximum number of nested calls that are forced for inlining " \ 3153 "(using CompileCommand or marked w/ @ForceInline)") \ 3154 \ 3155 product_pd(intx, InlineSmallCode, \ 3156 "Only inline already compiled methods if their code size is " \ 3157 "less than this") \ 3158 \ 3159 product(intx, MaxInlineSize, 35, \ 3160 "The maximum bytecode size of a method to be inlined") \ 3161 \ 3162 product_pd(intx, FreqInlineSize, \ 3163 "The maximum bytecode size of a frequent method to be inlined") \ 3164 \ 3165 product(intx, MaxTrivialSize, 6, \ 3166 "The maximum bytecode size of a trivial method to be inlined") \ 3167 \ 3168 product(intx, MinInliningThreshold, 250, \ 3169 "The minimum invocation count a method needs to have to be " \ 3170 "inlined") \ 3171 \ 3172 develop(intx, MethodHistogramCutoff, 100, \ 3173 "The cutoff value for method invocation histogram (+CountCalls)") \ 3174 \ 3175 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3176 "Number of interpreted methods to show in profile") \ 3177 \ 3178 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3179 "Number of compiled methods to show in profile") \ 3180 \ 3181 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3182 "Number of stub methods to show in profile") \ 3183 \ 3184 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3185 "Number of runtime stub nodes to show in profile") \ 3186 \ 3187 product(intx, ProfileIntervalsTicks, 100, \ 3188 "Number of ticks between printing of interval profile " \ 3189 "(+ProfileIntervals)") \ 3190 \ 3191 notproduct(intx, ScavengeALotInterval, 1, \ 3192 "Interval between which scavenge will occur with +ScavengeALot") \ 3193 \ 3194 notproduct(intx, FullGCALotInterval, 1, \ 3195 "Interval between which full gc will occur with +FullGCALot") \ 3196 \ 3197 notproduct(intx, FullGCALotStart, 0, \ 3198 "For which invocation to start FullGCAlot") \ 3199 \ 3200 notproduct(intx, FullGCALotDummies, 32*K, \ 3201 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3202 "to move") \ 3203 \ 3204 develop(intx, DontYieldALotInterval, 10, \ 3205 "Interval between which yields will be dropped (milliseconds)") \ 3206 \ 3207 develop(intx, MinSleepInterval, 1, \ 3208 "Minimum sleep() interval (milliseconds) when " \ 3209 "ConvertSleepToYield is off (used for Solaris)") \ 3210 \ 3211 develop(intx, ProfilerPCTickThreshold, 15, \ 3212 "Number of ticks in a PC buckets to be a hotspot") \ 3213 \ 3214 notproduct(intx, DeoptimizeALotInterval, 5, \ 3215 "Number of exits until DeoptimizeALot kicks in") \ 3216 \ 3217 notproduct(intx, ZombieALotInterval, 5, \ 3218 "Number of exits until ZombieALot kicks in") \ 3219 \ 3220 diagnostic(intx, MallocVerifyInterval, 0, \ 3221 "If non-zero, verify C heap after every N calls to " \ 3222 "malloc/realloc/free") \ 3223 \ 3224 diagnostic(intx, MallocVerifyStart, 0, \ 3225 "If non-zero, start verifying C heap after Nth call to " \ 3226 "malloc/realloc/free") \ 3227 \ 3228 diagnostic(uintx, MallocMaxTestWords, 0, \ 3229 "If non-zero, maximum number of words that malloc/realloc can " \ 3230 "allocate (for testing only)") \ 3231 \ 3232 product(intx, TypeProfileWidth, 2, \ 3233 "Number of receiver types to record in call/cast profile") \ 3234 \ 3235 develop(intx, BciProfileWidth, 2, \ 3236 "Number of return bci's to record in ret profile") \ 3237 \ 3238 product(intx, PerMethodRecompilationCutoff, 400, \ 3239 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3240 range(-1, max_intx) \ 3241 \ 3242 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3243 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3244 range(-1, max_intx) \ 3245 \ 3246 product(intx, PerMethodTrapLimit, 100, \ 3247 "Limit on traps (of one kind) in a method (includes inlines)") \ 3248 \ 3249 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3250 "Limit on speculative traps (of one kind) in a method " \ 3251 "(includes inlines)") \ 3252 \ 3253 product(intx, PerBytecodeTrapLimit, 4, \ 3254 "Limit on traps (of one kind) at a particular BCI") \ 3255 \ 3256 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3257 "Extra method data trap entries for speculation") \ 3258 \ 3259 develop(intx, InlineFrequencyRatio, 20, \ 3260 "Ratio of call site execution to caller method invocation") \ 3261 \ 3262 develop_pd(intx, InlineFrequencyCount, \ 3263 "Count of call site execution necessary to trigger frequent " \ 3264 "inlining") \ 3265 \ 3266 develop(intx, InlineThrowCount, 50, \ 3267 "Force inlining of interpreted methods that throw this often") \ 3268 \ 3269 develop(intx, InlineThrowMaxSize, 200, \ 3270 "Force inlining of throwing methods smaller than this") \ 3271 \ 3272 develop(intx, ProfilerNodeSize, 1024, \ 3273 "Size in K to allocate for the Profile Nodes of each thread") \ 3274 \ 3275 /* gc parameters */ \ 3276 product(size_t, InitialHeapSize, 0, \ 3277 "Initial heap size (in bytes); zero means use ergonomics") \ 3278 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3279 \ 3280 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3281 "Maximum heap size (in bytes)") \ 3282 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3283 \ 3284 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3285 "Initial tenured generation size (in bytes)") \ 3286 \ 3287 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3288 "Initial new generation size (in bytes)") \ 3289 constraint(NewSizeConstraintFunc,AfterErgo) \ 3290 \ 3291 product(size_t, MaxNewSize, max_uintx, \ 3292 "Maximum new generation size (in bytes), max_uintx means set " \ 3293 "ergonomically") \ 3294 \ 3295 product(size_t, PretenureSizeThreshold, 0, \ 3296 "Maximum size in bytes of objects allocated in DefNew " \ 3297 "generation; zero means no maximum") \ 3298 \ 3299 product(size_t, MinTLABSize, 2*K, \ 3300 "Minimum allowed TLAB size (in bytes)") \ 3301 range(1, max_uintx) \ 3302 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3303 \ 3304 product(size_t, TLABSize, 0, \ 3305 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3306 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3307 \ 3308 product(size_t, YoungPLABSize, 4096, \ 3309 "Size of young gen promotion LAB's (in HeapWords)") \ 3310 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3311 \ 3312 product(size_t, OldPLABSize, 1024, \ 3313 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3314 "of blocks to attempt to claim when refilling CMS LAB's") \ 3315 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3316 \ 3317 product(uintx, TLABAllocationWeight, 35, \ 3318 "Allocation averaging weight") \ 3319 range(0, 100) \ 3320 \ 3321 /* Limit the lower bound of this flag to 1 as it is used */ \ 3322 /* in a division expression. */ \ 3323 product(uintx, TLABWasteTargetPercent, 1, \ 3324 "Percentage of Eden that can be wasted") \ 3325 range(1, 100) \ 3326 \ 3327 product(uintx, TLABRefillWasteFraction, 64, \ 3328 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3329 range(1, max_uintx) \ 3330 \ 3331 product(uintx, TLABWasteIncrement, 4, \ 3332 "Increment allowed waste at slow allocation") \ 3333 \ 3334 product(uintx, SurvivorRatio, 8, \ 3335 "Ratio of eden/survivor space size") \ 3336 range(1, max_uintx-2) \ 3337 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3338 \ 3339 product(uintx, NewRatio, 2, \ 3340 "Ratio of old/new generation sizes") \ 3341 range(0, max_uintx-1) \ 3342 \ 3343 product_pd(size_t, NewSizeThreadIncrease, \ 3344 "Additional size added to desired new generation size per " \ 3345 "non-daemon thread (in bytes)") \ 3346 \ 3347 product_pd(size_t, MetaspaceSize, \ 3348 "Initial size of Metaspaces (in bytes)") \ 3349 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3350 \ 3351 product(size_t, MaxMetaspaceSize, max_uintx, \ 3352 "Maximum size of Metaspaces (in bytes)") \ 3353 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3354 \ 3355 product(size_t, CompressedClassSpaceSize, 1*G, \ 3356 "Maximum size of class area in Metaspace when compressed " \ 3357 "class pointers are used") \ 3358 range(1*M, 3*G) \ 3359 \ 3360 manageable(uintx, MinHeapFreeRatio, 40, \ 3361 "The minimum percentage of heap free after GC to avoid expansion."\ 3362 " For most GCs this applies to the old generation. In G1 and" \ 3363 " ParallelGC it applies to the whole heap.") \ 3364 range(0, 100) \ 3365 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3366 \ 3367 manageable(uintx, MaxHeapFreeRatio, 70, \ 3368 "The maximum percentage of heap free after GC to avoid shrinking."\ 3369 " For most GCs this applies to the old generation. In G1 and" \ 3370 " ParallelGC it applies to the whole heap.") \ 3371 range(0, 100) \ 3372 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3373 \ 3374 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3375 "Number of milliseconds per MB of free space in the heap") \ 3376 range(0, max_intx) \ 3377 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3378 \ 3379 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3380 "The minimum change in heap space due to GC (in bytes)") \ 3381 \ 3382 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3383 "The minimum expansion of Metaspace (in bytes)") \ 3384 \ 3385 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3386 "The maximum percentage of Metaspace free after GC to avoid " \ 3387 "shrinking") \ 3388 range(0, 100) \ 3389 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3390 \ 3391 product(uintx, MinMetaspaceFreeRatio, 40, \ 3392 "The minimum percentage of Metaspace free after GC to avoid " \ 3393 "expansion") \ 3394 range(0, 99) \ 3395 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3396 \ 3397 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3398 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3399 \ 3400 product(uintx, QueuedAllocationWarningCount, 0, \ 3401 "Number of times an allocation that queues behind a GC " \ 3402 "will retry before printing a warning") \ 3403 \ 3404 diagnostic(uintx, VerifyGCStartAt, 0, \ 3405 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3406 \ 3407 diagnostic(intx, VerifyGCLevel, 0, \ 3408 "Generation level at which to start +VerifyBefore/AfterGC") \ 3409 range(0, 1) \ 3410 \ 3411 product(uintx, MaxTenuringThreshold, 15, \ 3412 "Maximum value for tenuring threshold") \ 3413 range(0, markOopDesc::max_age + 1) \ 3414 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3415 \ 3416 product(uintx, InitialTenuringThreshold, 7, \ 3417 "Initial value for tenuring threshold") \ 3418 range(0, markOopDesc::max_age + 1) \ 3419 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3420 \ 3421 product(uintx, TargetSurvivorRatio, 50, \ 3422 "Desired percentage of survivor space used after scavenge") \ 3423 range(0, 100) \ 3424 \ 3425 product(uintx, MarkSweepDeadRatio, 5, \ 3426 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3427 "Serial mark sweep treats this as both the minimum and maximum " \ 3428 "value. " \ 3429 "CMS uses this value only if it falls back to mark sweep. " \ 3430 "Par compact uses a variable scale based on the density of the " \ 3431 "generation and treats this as the maximum value when the heap " \ 3432 "is either completely full or completely empty. Par compact " \ 3433 "also has a smaller default value; see arguments.cpp.") \ 3434 range(0, 100) \ 3435 \ 3436 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3437 "How often should we fully compact the heap (ignoring the dead " \ 3438 "space parameters)") \ 3439 range(1, max_uintx) \ 3440 \ 3441 product(intx, PrintCMSStatistics, 0, \ 3442 "Statistics for CMS") \ 3443 \ 3444 product(bool, PrintCMSInitiationStatistics, false, \ 3445 "Statistics for initiating a CMS collection") \ 3446 \ 3447 product(intx, PrintFLSStatistics, 0, \ 3448 "Statistics for CMS' FreeListSpace") \ 3449 \ 3450 product(intx, PrintFLSCensus, 0, \ 3451 "Census for CMS' FreeListSpace") \ 3452 \ 3453 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3454 "Delay between expansion and allocation (in milliseconds)") \ 3455 \ 3456 develop(uintx, GCWorkerDelayMillis, 0, \ 3457 "Delay in scheduling GC workers (in milliseconds)") \ 3458 \ 3459 product(intx, DeferThrSuspendLoopCount, 4000, \ 3460 "(Unstable) Number of times to iterate in safepoint loop " \ 3461 "before blocking VM threads ") \ 3462 \ 3463 product(intx, DeferPollingPageLoopCount, -1, \ 3464 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3465 "before changing safepoint polling page to RO ") \ 3466 \ 3467 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3468 range(0, max_intx) \ 3469 \ 3470 product(bool, PSChunkLargeArrays, true, \ 3471 "Process large arrays in chunks") \ 3472 \ 3473 product(uintx, GCDrainStackTargetSize, 64, \ 3474 "Number of entries we will try to leave on the stack " \ 3475 "during parallel gc") \ 3476 \ 3477 /* stack parameters */ \ 3478 product_pd(intx, StackYellowPages, \ 3479 "Number of yellow zone (recoverable overflows) pages") \ 3480 range(1, max_intx) \ 3481 \ 3482 product_pd(intx, StackRedPages, \ 3483 "Number of red zone (unrecoverable overflows) pages") \ 3484 range(1, max_intx) \ 3485 \ 3486 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3487 product_pd(intx, StackShadowPages, \ 3488 "Number of shadow zone (for overflow checking) pages " \ 3489 "this should exceed the depth of the VM and native call stack") \ 3490 range(1, 50) \ 3491 \ 3492 product_pd(intx, ThreadStackSize, \ 3493 "Thread Stack Size (in Kbytes)") \ 3494 \ 3495 product_pd(intx, VMThreadStackSize, \ 3496 "Non-Java Thread Stack Size (in Kbytes)") \ 3497 \ 3498 product_pd(intx, CompilerThreadStackSize, \ 3499 "Compiler Thread Stack Size (in Kbytes)") \ 3500 \ 3501 develop_pd(size_t, JVMInvokeMethodSlack, \ 3502 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3503 \ 3504 /* code cache parameters */ \ 3505 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3506 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\ 3507 "Code cache segment size (in bytes) - smallest unit of " \ 3508 "allocation") \ 3509 range(1, 1024) \ 3510 \ 3511 develop_pd(intx, CodeEntryAlignment, \ 3512 "Code entry alignment for generated code (in bytes)") \ 3513 \ 3514 product_pd(intx, OptoLoopAlignment, \ 3515 "Align inner loops to zero relative to this modulus") \ 3516 \ 3517 product_pd(uintx, InitialCodeCacheSize, \ 3518 "Initial code cache size (in bytes)") \ 3519 \ 3520 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3521 "Minimum code cache size (in bytes) required to start VM.") \ 3522 \ 3523 product(bool, SegmentedCodeCache, false, \ 3524 "Use a segmented code cache") \ 3525 \ 3526 product_pd(uintx, ReservedCodeCacheSize, \ 3527 "Reserved code cache size (in bytes) - maximum code cache size") \ 3528 \ 3529 product_pd(uintx, NonProfiledCodeHeapSize, \ 3530 "Size of code heap with non-profiled methods (in bytes)") \ 3531 \ 3532 product_pd(uintx, ProfiledCodeHeapSize, \ 3533 "Size of code heap with profiled methods (in bytes)") \ 3534 \ 3535 product_pd(uintx, NonNMethodCodeHeapSize, \ 3536 "Size of code heap with non-nmethods (in bytes)") \ 3537 \ 3538 product_pd(uintx, CodeCacheExpansionSize, \ 3539 "Code cache expansion size (in bytes)") \ 3540 \ 3541 develop_pd(uintx, CodeCacheMinBlockLength, \ 3542 "Minimum number of segments in a code cache block") \ 3543 range(1, 100) \ 3544 \ 3545 notproduct(bool, ExitOnFullCodeCache, false, \ 3546 "Exit the VM if we fill the code cache") \ 3547 \ 3548 product(bool, UseCodeCacheFlushing, true, \ 3549 "Remove cold/old nmethods from the code cache") \ 3550 \ 3551 product(uintx, StartAggressiveSweepingAt, 10, \ 3552 "Start aggressive sweeping if X[%] of the code cache is free." \ 3553 "Segmented code cache: X[%] of the non-profiled heap." \ 3554 "Non-segmented code cache: X[%] of the total code cache") \ 3555 range(0, 100) \ 3556 \ 3557 /* interpreter debugging */ \ 3558 develop(intx, BinarySwitchThreshold, 5, \ 3559 "Minimal number of lookupswitch entries for rewriting to binary " \ 3560 "switch") \ 3561 \ 3562 develop(intx, StopInterpreterAt, 0, \ 3563 "Stop interpreter execution at specified bytecode number") \ 3564 \ 3565 develop(intx, TraceBytecodesAt, 0, \ 3566 "Trace bytecodes starting with specified bytecode number") \ 3567 \ 3568 /* compiler interface */ \ 3569 develop(intx, CIStart, 0, \ 3570 "The id of the first compilation to permit") \ 3571 \ 3572 develop(intx, CIStop, max_jint, \ 3573 "The id of the last compilation to permit") \ 3574 \ 3575 develop(intx, CIStartOSR, 0, \ 3576 "The id of the first osr compilation to permit " \ 3577 "(CICountOSR must be on)") \ 3578 \ 3579 develop(intx, CIStopOSR, max_jint, \ 3580 "The id of the last osr compilation to permit " \ 3581 "(CICountOSR must be on)") \ 3582 \ 3583 develop(intx, CIBreakAtOSR, -1, \ 3584 "The id of osr compilation to break at") \ 3585 \ 3586 develop(intx, CIBreakAt, -1, \ 3587 "The id of compilation to break at") \ 3588 \ 3589 product(ccstrlist, CompileOnly, "", \ 3590 "List of methods (pkg/class.name) to restrict compilation to") \ 3591 \ 3592 product(ccstr, CompileCommandFile, NULL, \ 3593 "Read compiler commands from this file [.hotspot_compiler]") \ 3594 \ 3595 product(ccstrlist, CompileCommand, "", \ 3596 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3597 \ 3598 develop(bool, ReplayCompiles, false, \ 3599 "Enable replay of compilations from ReplayDataFile") \ 3600 \ 3601 product(ccstr, ReplayDataFile, NULL, \ 3602 "File containing compilation replay information" \ 3603 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3604 \ 3605 product(ccstr, InlineDataFile, NULL, \ 3606 "File containing inlining replay information" \ 3607 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3608 \ 3609 develop(intx, ReplaySuppressInitializers, 2, \ 3610 "Control handling of class initialization during replay: " \ 3611 "0 - don't do anything special; " \ 3612 "1 - treat all class initializers as empty; " \ 3613 "2 - treat class initializers for application classes as empty; " \ 3614 "3 - allow all class initializers to run during bootstrap but " \ 3615 " pretend they are empty after starting replay") \ 3616 range(0, 3) \ 3617 \ 3618 develop(bool, ReplayIgnoreInitErrors, false, \ 3619 "Ignore exceptions thrown during initialization for replay") \ 3620 \ 3621 product(bool, DumpReplayDataOnError, true, \ 3622 "Record replay data for crashing compiler threads") \ 3623 \ 3624 product(bool, CICompilerCountPerCPU, false, \ 3625 "1 compiler thread for log(N CPUs)") \ 3626 \ 3627 develop(intx, CIFireOOMAt, -1, \ 3628 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3629 "(non-negative value throws OOM after this many CI accesses " \ 3630 "in each compile)") \ 3631 notproduct(intx, CICrashAt, -1, \ 3632 "id of compilation to trigger assert in compiler thread for " \ 3633 "the purpose of testing, e.g. generation of replay data") \ 3634 notproduct(bool, CIObjectFactoryVerify, false, \ 3635 "enable potentially expensive verification in ciObjectFactory") \ 3636 \ 3637 /* Priorities */ \ 3638 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3639 \ 3640 product(intx, ThreadPriorityPolicy, 0, \ 3641 "0 : Normal. "\ 3642 " VM chooses priorities that are appropriate for normal "\ 3643 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3644 " to normal native priority. Java priorities below " \ 3645 " NORM_PRIORITY map to lower native priority values. On "\ 3646 " Windows applications are allowed to use higher native "\ 3647 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3648 " not use the highest possible native priority, "\ 3649 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3650 " system threads. On Linux thread priorities are ignored "\ 3651 " because the OS does not support static priority in "\ 3652 " SCHED_OTHER scheduling class which is the only choice for "\ 3653 " non-root, non-realtime applications. "\ 3654 "1 : Aggressive. "\ 3655 " Java thread priorities map over to the entire range of "\ 3656 " native thread priorities. Higher Java thread priorities map "\ 3657 " to higher native thread priorities. This policy should be "\ 3658 " used with care, as sometimes it can cause performance "\ 3659 " degradation in the application and/or the entire system. On "\ 3660 " Linux this policy requires root privilege.") \ 3661 range(0, 1) \ 3662 \ 3663 product(bool, ThreadPriorityVerbose, false, \ 3664 "Print priority changes") \ 3665 \ 3666 product(intx, CompilerThreadPriority, -1, \ 3667 "The native priority at which compiler threads should run " \ 3668 "(-1 means no change)") \ 3669 \ 3670 product(intx, VMThreadPriority, -1, \ 3671 "The native priority at which the VM thread should run " \ 3672 "(-1 means no change)") \ 3673 \ 3674 product(bool, CompilerThreadHintNoPreempt, true, \ 3675 "(Solaris only) Give compiler threads an extra quanta") \ 3676 \ 3677 product(bool, VMThreadHintNoPreempt, false, \ 3678 "(Solaris only) Give VM thread an extra quanta") \ 3679 \ 3680 product(intx, JavaPriority1_To_OSPriority, -1, \ 3681 "Map Java priorities to OS priorities") \ 3682 \ 3683 product(intx, JavaPriority2_To_OSPriority, -1, \ 3684 "Map Java priorities to OS priorities") \ 3685 \ 3686 product(intx, JavaPriority3_To_OSPriority, -1, \ 3687 "Map Java priorities to OS priorities") \ 3688 \ 3689 product(intx, JavaPriority4_To_OSPriority, -1, \ 3690 "Map Java priorities to OS priorities") \ 3691 \ 3692 product(intx, JavaPriority5_To_OSPriority, -1, \ 3693 "Map Java priorities to OS priorities") \ 3694 \ 3695 product(intx, JavaPriority6_To_OSPriority, -1, \ 3696 "Map Java priorities to OS priorities") \ 3697 \ 3698 product(intx, JavaPriority7_To_OSPriority, -1, \ 3699 "Map Java priorities to OS priorities") \ 3700 \ 3701 product(intx, JavaPriority8_To_OSPriority, -1, \ 3702 "Map Java priorities to OS priorities") \ 3703 \ 3704 product(intx, JavaPriority9_To_OSPriority, -1, \ 3705 "Map Java priorities to OS priorities") \ 3706 \ 3707 product(intx, JavaPriority10_To_OSPriority,-1, \ 3708 "Map Java priorities to OS priorities") \ 3709 \ 3710 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3711 "Java thread priority 10 maps to critical scheduling priority") \ 3712 \ 3713 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3714 "Compiler thread(s) run at critical scheduling priority") \ 3715 \ 3716 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3717 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3718 \ 3719 /* compiler debugging */ \ 3720 notproduct(intx, CompileTheWorldStartAt, 1, \ 3721 "First class to consider when using +CompileTheWorld") \ 3722 \ 3723 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3724 "Last class to consider when using +CompileTheWorld") \ 3725 \ 3726 develop(intx, NewCodeParameter, 0, \ 3727 "Testing Only: Create a dedicated integer parameter before " \ 3728 "putback") \ 3729 \ 3730 /* new oopmap storage allocation */ \ 3731 develop(intx, MinOopMapAllocation, 8, \ 3732 "Minimum number of OopMap entries in an OopMapSet") \ 3733 \ 3734 /* Background Compilation */ \ 3735 develop(intx, LongCompileThreshold, 50, \ 3736 "Used with +TraceLongCompiles") \ 3737 \ 3738 /* recompilation */ \ 3739 product_pd(intx, CompileThreshold, \ 3740 "number of interpreted method invocations before (re-)compiling") \ 3741 \ 3742 product(double, CompileThresholdScaling, 1.0, \ 3743 "Factor to control when first compilation happens " \ 3744 "(both with and without tiered compilation): " \ 3745 "values greater than 1.0 delay counter overflow, " \ 3746 "values between 0 and 1.0 rush counter overflow, " \ 3747 "value of 1.0 leaves compilation thresholds unchanged " \ 3748 "value of 0.0 is equivalent to -Xint. " \ 3749 "" \ 3750 "Flag can be set as per-method option. " \ 3751 "If a value is specified for a method, compilation thresholds " \ 3752 "for that method are scaled by both the value of the global flag "\ 3753 "and the value of the per-method flag.") \ 3754 \ 3755 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3756 "Interpreter (tier 0) invocation notification frequency") \ 3757 \ 3758 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3759 "C1 without MDO (tier 2) invocation notification frequency") \ 3760 \ 3761 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3762 "C1 with MDO profiling (tier 3) invocation notification " \ 3763 "frequency") \ 3764 \ 3765 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3766 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3767 \ 3768 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3769 "Interpreter (tier 0) invocation notification frequency") \ 3770 \ 3771 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3772 "C1 without MDO (tier 2) invocation notification frequency") \ 3773 \ 3774 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3775 "C1 with MDO profiling (tier 3) invocation notification " \ 3776 "frequency") \ 3777 \ 3778 product(intx, Tier2CompileThreshold, 0, \ 3779 "threshold at which tier 2 compilation is invoked") \ 3780 \ 3781 product(intx, Tier2BackEdgeThreshold, 0, \ 3782 "Back edge threshold at which tier 2 compilation is invoked") \ 3783 \ 3784 product(intx, Tier3InvocationThreshold, 200, \ 3785 "Compile if number of method invocations crosses this " \ 3786 "threshold") \ 3787 \ 3788 product(intx, Tier3MinInvocationThreshold, 100, \ 3789 "Minimum invocation to compile at tier 3") \ 3790 \ 3791 product(intx, Tier3CompileThreshold, 2000, \ 3792 "Threshold at which tier 3 compilation is invoked (invocation " \ 3793 "minimum must be satisfied") \ 3794 \ 3795 product(intx, Tier3BackEdgeThreshold, 60000, \ 3796 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3797 \ 3798 product(intx, Tier4InvocationThreshold, 5000, \ 3799 "Compile if number of method invocations crosses this " \ 3800 "threshold") \ 3801 \ 3802 product(intx, Tier4MinInvocationThreshold, 600, \ 3803 "Minimum invocation to compile at tier 4") \ 3804 \ 3805 product(intx, Tier4CompileThreshold, 15000, \ 3806 "Threshold at which tier 4 compilation is invoked (invocation " \ 3807 "minimum must be satisfied") \ 3808 \ 3809 product(intx, Tier4BackEdgeThreshold, 40000, \ 3810 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3811 \ 3812 product(intx, Tier3DelayOn, 5, \ 3813 "If C2 queue size grows over this amount per compiler thread " \ 3814 "stop compiling at tier 3 and start compiling at tier 2") \ 3815 \ 3816 product(intx, Tier3DelayOff, 2, \ 3817 "If C2 queue size is less than this amount per compiler thread " \ 3818 "allow methods compiled at tier 2 transition to tier 3") \ 3819 \ 3820 product(intx, Tier3LoadFeedback, 5, \ 3821 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3822 "reaches this amount per compiler thread") \ 3823 \ 3824 product(intx, Tier4LoadFeedback, 3, \ 3825 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3826 "reaches this amount per compiler thread") \ 3827 \ 3828 product(intx, TieredCompileTaskTimeout, 50, \ 3829 "Kill compile task if method was not used within " \ 3830 "given timeout in milliseconds") \ 3831 \ 3832 product(intx, TieredStopAtLevel, 4, \ 3833 "Stop at given compilation level") \ 3834 \ 3835 product(intx, Tier0ProfilingStartPercentage, 200, \ 3836 "Start profiling in interpreter if the counters exceed tier 3 " \ 3837 "thresholds by the specified percentage") \ 3838 \ 3839 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3840 "Increase the compile threshold for C1 compilation if the code " \ 3841 "cache is filled by the specified percentage") \ 3842 range(0, 99) \ 3843 \ 3844 product(intx, TieredRateUpdateMinTime, 1, \ 3845 "Minimum rate sampling interval (in milliseconds)") \ 3846 \ 3847 product(intx, TieredRateUpdateMaxTime, 25, \ 3848 "Maximum rate sampling interval (in milliseconds)") \ 3849 \ 3850 product_pd(bool, TieredCompilation, \ 3851 "Enable tiered compilation") \ 3852 \ 3853 product(bool, PrintTieredEvents, false, \ 3854 "Print tiered events notifications") \ 3855 \ 3856 product_pd(intx, OnStackReplacePercentage, \ 3857 "NON_TIERED number of method invocations/branches (expressed as " \ 3858 "% of CompileThreshold) before (re-)compiling OSR code") \ 3859 \ 3860 product(intx, InterpreterProfilePercentage, 33, \ 3861 "NON_TIERED number of method invocations/branches (expressed as " \ 3862 "% of CompileThreshold) before profiling in the interpreter") \ 3863 range(0, 100) \ 3864 \ 3865 develop(intx, MaxRecompilationSearchLength, 10, \ 3866 "The maximum number of frames to inspect when searching for " \ 3867 "recompilee") \ 3868 \ 3869 develop(intx, MaxInterpretedSearchLength, 3, \ 3870 "The maximum number of interpreted frames to skip when searching "\ 3871 "for recompilee") \ 3872 \ 3873 develop(intx, DesiredMethodLimit, 8000, \ 3874 "The desired maximum method size (in bytecodes) after inlining") \ 3875 \ 3876 develop(intx, HugeMethodLimit, 8000, \ 3877 "Don't compile methods larger than this if " \ 3878 "+DontCompileHugeMethods") \ 3879 \ 3880 /* New JDK 1.4 reflection implementation */ \ 3881 \ 3882 develop(intx, FastSuperclassLimit, 8, \ 3883 "Depth of hardwired instanceof accelerator array") \ 3884 \ 3885 /* Properties for Java libraries */ \ 3886 \ 3887 product(size_t, MaxDirectMemorySize, 0, \ 3888 "Maximum total size of NIO direct-buffer allocations") \ 3889 \ 3890 /* Flags used for temporary code during development */ \ 3891 \ 3892 diagnostic(bool, UseNewCode, false, \ 3893 "Testing Only: Use the new version while testing") \ 3894 \ 3895 diagnostic(bool, UseNewCode2, false, \ 3896 "Testing Only: Use the new version while testing") \ 3897 \ 3898 diagnostic(bool, UseNewCode3, false, \ 3899 "Testing Only: Use the new version while testing") \ 3900 \ 3901 /* flags for performance data collection */ \ 3902 \ 3903 product(bool, UsePerfData, falseInEmbedded, \ 3904 "Flag to disable jvmstat instrumentation for performance testing "\ 3905 "and problem isolation purposes") \ 3906 \ 3907 product(bool, PerfDataSaveToFile, false, \ 3908 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3909 \ 3910 product(ccstr, PerfDataSaveFile, NULL, \ 3911 "Save PerfData memory to the specified absolute pathname. " \ 3912 "The string %p in the file name (if present) " \ 3913 "will be replaced by pid") \ 3914 \ 3915 product(intx, PerfDataSamplingInterval, 50, \ 3916 "Data sampling interval (in milliseconds)") \ 3917 \ 3918 develop(bool, PerfTraceDataCreation, false, \ 3919 "Trace creation of Performance Data Entries") \ 3920 \ 3921 develop(bool, PerfTraceMemOps, false, \ 3922 "Trace PerfMemory create/attach/detach calls") \ 3923 \ 3924 product(bool, PerfDisableSharedMem, false, \ 3925 "Store performance data in standard memory") \ 3926 \ 3927 product(intx, PerfDataMemorySize, 64*K, \ 3928 "Size of performance data memory region. Will be rounded " \ 3929 "up to a multiple of the native os page size.") \ 3930 \ 3931 product(intx, PerfMaxStringConstLength, 1024, \ 3932 "Maximum PerfStringConstant string length before truncation") \ 3933 \ 3934 product(bool, PerfAllowAtExitRegistration, false, \ 3935 "Allow registration of atexit() methods") \ 3936 \ 3937 product(bool, PerfBypassFileSystemCheck, false, \ 3938 "Bypass Win32 file system criteria checks (Windows Only)") \ 3939 \ 3940 product(intx, UnguardOnExecutionViolation, 0, \ 3941 "Unguard page and retry on no-execute fault (Win32 only) " \ 3942 "0=off, 1=conservative, 2=aggressive") \ 3943 range(0, 2) \ 3944 \ 3945 /* Serviceability Support */ \ 3946 \ 3947 product(bool, ManagementServer, false, \ 3948 "Create JMX Management Server") \ 3949 \ 3950 product(bool, DisableAttachMechanism, false, \ 3951 "Disable mechanism that allows tools to attach to this VM") \ 3952 \ 3953 product(bool, StartAttachListener, false, \ 3954 "Always start Attach Listener at VM startup") \ 3955 \ 3956 manageable(bool, PrintConcurrentLocks, false, \ 3957 "Print java.util.concurrent locks in thread dump") \ 3958 \ 3959 product(bool, TransmitErrorReport, false, \ 3960 "Enable error report transmission on erroneous termination") \ 3961 \ 3962 product(ccstr, ErrorReportServer, NULL, \ 3963 "Override built-in error report server address") \ 3964 \ 3965 /* Shared spaces */ \ 3966 \ 3967 product(bool, UseSharedSpaces, true, \ 3968 "Use shared spaces for metadata") \ 3969 \ 3970 product(bool, VerifySharedSpaces, false, \ 3971 "Verify shared spaces (false for default archive, true for " \ 3972 "archive specified by -XX:SharedArchiveFile)") \ 3973 \ 3974 product(bool, RequireSharedSpaces, false, \ 3975 "Require shared spaces for metadata") \ 3976 \ 3977 product(bool, DumpSharedSpaces, false, \ 3978 "Special mode: JVM reads a class list, loads classes, builds " \ 3979 "shared spaces, and dumps the shared spaces to a file to be " \ 3980 "used in future JVM runs") \ 3981 \ 3982 product(bool, PrintSharedSpaces, false, \ 3983 "Print usage of shared spaces") \ 3984 \ 3985 product(bool, PrintSharedArchiveAndExit, false, \ 3986 "Print shared archive file contents") \ 3987 \ 3988 product(bool, PrintSharedDictionary, false, \ 3989 "If PrintSharedArchiveAndExit is true, also print the shared " \ 3990 "dictionary") \ 3991 \ 3992 product(size_t, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3993 "Size of read-write space for metadata (in bytes)") \ 3994 \ 3995 product(size_t, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3996 "Size of read-only space for metadata (in bytes)") \ 3997 \ 3998 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3999 "Size of the shared miscellaneous data area (in bytes)") \ 4000 \ 4001 product(uintx, SharedMiscCodeSize, 120*K, \ 4002 "Size of the shared miscellaneous code area (in bytes)") \ 4003 \ 4004 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 4005 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 4006 "Address to allocate shared memory region for class data") \ 4007 \ 4008 product(uintx, SharedSymbolTableBucketSize, 4, \ 4009 "Average number of symbols per bucket in shared table") \ 4010 \ 4011 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 4012 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 4013 "classes. Just exclude them from the shared dictionary.") \ 4014 \ 4015 diagnostic(bool, PrintMethodHandleStubs, false, \ 4016 "Print generated stub code for method handles") \ 4017 \ 4018 develop(bool, TraceMethodHandles, false, \ 4019 "trace internal method handle operations") \ 4020 \ 4021 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4022 "perform extra checks when constructing method handles") \ 4023 \ 4024 diagnostic(bool, ShowHiddenFrames, false, \ 4025 "show method handle implementation frames (usually hidden)") \ 4026 \ 4027 experimental(bool, TrustFinalNonStaticFields, false, \ 4028 "trust final non-static declarations for constant folding") \ 4029 \ 4030 diagnostic(bool, FoldStableValues, true, \ 4031 "Optimize loads from stable fields (marked w/ @Stable)") \ 4032 \ 4033 develop(bool, TraceInvokeDynamic, false, \ 4034 "trace internal invoke dynamic operations") \ 4035 \ 4036 diagnostic(bool, PauseAtStartup, false, \ 4037 "Causes the VM to pause at startup time and wait for the pause " \ 4038 "file to be removed (default: ./vm.paused.<pid>)") \ 4039 \ 4040 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4041 "The file to create and for whose removal to await when pausing " \ 4042 "at startup. (default: ./vm.paused.<pid>)") \ 4043 \ 4044 diagnostic(bool, PauseAtExit, false, \ 4045 "Pause and wait for keypress on exit if a debugger is attached") \ 4046 \ 4047 product(bool, ExtendedDTraceProbes, false, \ 4048 "Enable performance-impacting dtrace probes") \ 4049 \ 4050 product(bool, DTraceMethodProbes, false, \ 4051 "Enable dtrace probes for method-entry and method-exit") \ 4052 \ 4053 product(bool, DTraceAllocProbes, false, \ 4054 "Enable dtrace probes for object allocation") \ 4055 \ 4056 product(bool, DTraceMonitorProbes, false, \ 4057 "Enable dtrace probes for monitor events") \ 4058 \ 4059 product(bool, RelaxAccessControlCheck, false, \ 4060 "Relax the access control checks in the verifier") \ 4061 \ 4062 product(uintx, StringTableSize, defaultStringTableSize, \ 4063 "Number of buckets in the interned String table") \ 4064 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4065 \ 4066 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4067 "Number of buckets in the JVM internal Symbol table") \ 4068 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4069 \ 4070 product(bool, UseStringDeduplication, false, \ 4071 "Use string deduplication") \ 4072 \ 4073 product(bool, PrintStringDeduplicationStatistics, false, \ 4074 "Print string deduplication statistics") \ 4075 \ 4076 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4077 "A string must reach this age (or be promoted to an old region) " \ 4078 "to be considered for deduplication") \ 4079 range(1, markOopDesc::max_age) \ 4080 \ 4081 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4082 "Force table resize every time the table is scanned") \ 4083 \ 4084 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4085 "Force table rehash every time the table is scanned") \ 4086 \ 4087 develop(bool, TraceDefaultMethods, false, \ 4088 "Trace the default method processing steps") \ 4089 \ 4090 diagnostic(bool, WhiteBoxAPI, false, \ 4091 "Enable internal testing APIs") \ 4092 \ 4093 product(bool, PrintGCCause, true, \ 4094 "Include GC cause in GC logging") \ 4095 \ 4096 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4097 "Default survivor space alignment in bytes") \ 4098 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4099 \ 4100 product(bool , AllowNonVirtualCalls, false, \ 4101 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4102 \ 4103 product(ccstr, DumpLoadedClassList, NULL, \ 4104 "Dump the names all loaded classes, that could be stored into " \ 4105 "the CDS archive, in the specified file") \ 4106 \ 4107 product(ccstr, SharedClassListFile, NULL, \ 4108 "Override the default CDS class list") \ 4109 \ 4110 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4111 "Override the default location of the CDS archive file") \ 4112 \ 4113 product(ccstr, ExtraSharedClassListFile, NULL, \ 4114 "Extra classlist for building the CDS archive file") \ 4115 \ 4116 experimental(size_t, ArrayAllocatorMallocLimit, \ 4117 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4118 "Allocation less than this value will be allocated " \ 4119 "using malloc. Larger allocations will use mmap.") \ 4120 \ 4121 experimental(bool, AlwaysAtomicAccesses, false, \ 4122 "Accesses to all variables should always be atomic") \ 4123 \ 4124 product(bool, EnableTracing, false, \ 4125 "Enable event-based tracing") \ 4126 \ 4127 product(bool, UseLockedTracing, false, \ 4128 "Use locked-tracing when doing event-based tracing") \ 4129 \ 4130 diagnostic(bool, UseUnalignedAccesses, false, \ 4131 "Use unaligned memory accesses in sun.misc.Unsafe") \ 4132 \ 4133 product_pd(bool, PreserveFramePointer, \ 4134 "Use the FP register for holding the frame pointer " \ 4135 "and not as a general purpose register.") \ 4136 \ 4137 diagnostic(bool, CheckIntrinsics, true, \ 4138 "When a class C is loaded, check that " \ 4139 "(1) all intrinsics defined by the VM for class C are present "\ 4140 "in the loaded class file and are marked with the " \ 4141 "@HotSpotIntrinsicCandidate annotation, that " \ 4142 "(2) there is an intrinsic registered for all loaded methods " \ 4143 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4144 "annotation, and that " \ 4145 "(3) no orphan methods exist for class C (i.e., methods for " \ 4146 "which the VM declares an intrinsic but that are not declared "\ 4147 "in the loaded class C. " \ 4148 "Check (3) is available only in debug builds.") 4149 4150/* 4151 * Macros for factoring of globals 4152 */ 4153 4154// Interface macros 4155#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4156#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4157#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4158#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4159#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4160#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4161#ifdef PRODUCT 4162#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value; 4163#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name; 4164#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name; 4165#else 4166#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4167#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4168#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4169#endif // PRODUCT 4170// Special LP64 flags, product only needed for now. 4171#ifdef _LP64 4172#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4173#else 4174#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4175#endif // _LP64 4176 4177// Implementation macros 4178#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4179#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4180#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4181#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4182#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4183#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4184#ifdef PRODUCT 4185#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value; 4186#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name; 4187#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value; 4188#else 4189#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4190#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4191#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4192#endif // PRODUCT 4193#ifdef _LP64 4194#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4195#else 4196#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4197#endif // _LP64 4198 4199// Only materialize src code for range checking when required, ignore otherwise 4200#define IGNORE_RANGE(a, b) 4201// Only materialize src code for contraint checking when required, ignore otherwise 4202#define IGNORE_CONSTRAINT(func,type) 4203 4204RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4205 DECLARE_PD_DEVELOPER_FLAG, \ 4206 DECLARE_PRODUCT_FLAG, \ 4207 DECLARE_PD_PRODUCT_FLAG, \ 4208 DECLARE_DIAGNOSTIC_FLAG, \ 4209 DECLARE_EXPERIMENTAL_FLAG, \ 4210 DECLARE_NOTPRODUCT_FLAG, \ 4211 DECLARE_MANAGEABLE_FLAG, \ 4212 DECLARE_PRODUCT_RW_FLAG, \ 4213 DECLARE_LP64_PRODUCT_FLAG, \ 4214 IGNORE_RANGE, \ 4215 IGNORE_CONSTRAINT) 4216 4217RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4218 DECLARE_PD_DEVELOPER_FLAG, \ 4219 DECLARE_PRODUCT_FLAG, \ 4220 DECLARE_PD_PRODUCT_FLAG, \ 4221 DECLARE_DIAGNOSTIC_FLAG, \ 4222 DECLARE_NOTPRODUCT_FLAG, \ 4223 IGNORE_RANGE, \ 4224 IGNORE_CONSTRAINT) 4225 4226ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4227 DECLARE_PRODUCT_FLAG, \ 4228 DECLARE_DIAGNOSTIC_FLAG, \ 4229 DECLARE_EXPERIMENTAL_FLAG, \ 4230 DECLARE_NOTPRODUCT_FLAG, \ 4231 IGNORE_RANGE, \ 4232 IGNORE_CONSTRAINT) 4233 4234// Extensions 4235 4236#include "runtime/globals_ext.hpp" 4237 4238#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4239