globals.hpp revision 8575:5916110131c4
176195Sbrian/* 276195Sbrian * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 376358Sbrian * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 476358Sbrian * 576358Sbrian * This code is free software; you can redistribute it and/or modify it 676195Sbrian * under the terms of the GNU General Public License version 2 only, as 776195Sbrian * published by the Free Software Foundation. 876195Sbrian * 976195Sbrian * This code is distributed in the hope that it will be useful, but WITHOUT 1076195Sbrian * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1176195Sbrian * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1276195Sbrian * version 2 for more details (a copy is included in the LICENSE file that 1376195Sbrian * accompanied this code). 1476195Sbrian * 1576195Sbrian * You should have received a copy of the GNU General Public License version 1676195Sbrian * 2 along with this work; if not, write to the Free Software Foundation, 1776195Sbrian * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1876195Sbrian * 1976195Sbrian * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2076195Sbrian * or visit www.oracle.com if you need additional information or have any 2176195Sbrian * questions. 2276195Sbrian * 2376195Sbrian */ 2476195Sbrian 2576195Sbrian#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 2676195Sbrian#define SHARE_VM_RUNTIME_GLOBALS_HPP 2776195Sbrian 2876195Sbrian#include "utilities/debug.hpp" 2976195Sbrian 3076195Sbrian// use this for flags that are true per default in the tiered build 3176195Sbrian// but false in non-tiered builds, and vice versa 3276195Sbrian#ifdef TIERED 3376195Sbrian#define trueInTiered true 3476195Sbrian#define falseInTiered false 3576195Sbrian#else 3676195Sbrian#define trueInTiered false 3776195Sbrian#define falseInTiered true 3890684Sbde#endif 3990684Sbde 4076195Sbrian#ifdef TARGET_ARCH_x86 4176195Sbrian# include "globals_x86.hpp" 4276195Sbrian#endif 4376195Sbrian#ifdef TARGET_ARCH_sparc 4476195Sbrian# include "globals_sparc.hpp" 4576195Sbrian#endif 4676195Sbrian#ifdef TARGET_ARCH_zero 4776195Sbrian# include "globals_zero.hpp" 48129879Sphk#endif 4976195Sbrian#ifdef TARGET_ARCH_arm 5076195Sbrian# include "globals_arm.hpp" 5176195Sbrian#endif 52131095Sphk#ifdef TARGET_ARCH_ppc 5376195Sbrian# include "globals_ppc.hpp" 5476195Sbrian#endif 5576195Sbrian#ifdef TARGET_ARCH_aarch64 5676848Sbrian# include "globals_aarch64.hpp" 5776853Sbrian#endif 5876853Sbrian#ifdef TARGET_OS_FAMILY_linux 5976853Sbrian# include "globals_linux.hpp" 6076853Sbrian#endif 6176195Sbrian#ifdef TARGET_OS_FAMILY_solaris 62136200Sphk# include "globals_solaris.hpp" 63136200Sphk#endif 64136200Sphk#ifdef TARGET_OS_FAMILY_windows 65136200Sphk# include "globals_windows.hpp" 66136200Sphk#endif 67136200Sphk#ifdef TARGET_OS_FAMILY_aix 6876195Sbrian# include "globals_aix.hpp" 6976195Sbrian#endif 70131373Sphk#ifdef TARGET_OS_FAMILY_bsd 71131095Sphk# include "globals_bsd.hpp" 7276195Sbrian#endif 7376195Sbrian#ifdef TARGET_OS_ARCH_linux_x86 7476195Sbrian# include "globals_linux_x86.hpp" 7576195Sbrian#endif 7676195Sbrian#ifdef TARGET_OS_ARCH_linux_sparc 77136200Sphk# include "globals_linux_sparc.hpp" 7876195Sbrian#endif 7976195Sbrian#ifdef TARGET_OS_ARCH_linux_zero 8076195Sbrian# include "globals_linux_zero.hpp" 8176195Sbrian#endif 8276195Sbrian#ifdef TARGET_OS_ARCH_solaris_x86 8376195Sbrian# include "globals_solaris_x86.hpp" 8476195Sbrian#endif 8576195Sbrian#ifdef TARGET_OS_ARCH_solaris_sparc 8676195Sbrian# include "globals_solaris_sparc.hpp" 8776195Sbrian#endif 8876195Sbrian#ifdef TARGET_OS_ARCH_windows_x86 8976195Sbrian# include "globals_windows_x86.hpp" 9076195Sbrian#endif 9176195Sbrian#ifdef TARGET_OS_ARCH_linux_arm 9276195Sbrian# include "globals_linux_arm.hpp" 9376195Sbrian#endif 9489062Smsmith#ifdef TARGET_OS_ARCH_linux_ppc 9591445Speter# include "globals_linux_ppc.hpp" 9676195Sbrian#endif 9776195Sbrian#ifdef TARGET_OS_ARCH_linux_aarch64 9876195Sbrian# include "globals_linux_aarch64.hpp" 9976195Sbrian#endif 10076195Sbrian#ifdef TARGET_OS_ARCH_aix_ppc 10176195Sbrian# include "globals_aix_ppc.hpp" 10276195Sbrian#endif 10376195Sbrian#ifdef TARGET_OS_ARCH_bsd_x86 10476195Sbrian# include "globals_bsd_x86.hpp" 10576195Sbrian#endif 10676195Sbrian#ifdef TARGET_OS_ARCH_bsd_zero 10776195Sbrian# include "globals_bsd_zero.hpp" 10876195Sbrian#endif 10976195Sbrian#ifdef COMPILER1 11076195Sbrian#ifdef TARGET_ARCH_x86 11176195Sbrian# include "c1_globals_x86.hpp" 11276195Sbrian#endif 11376195Sbrian#ifdef TARGET_ARCH_sparc 11476195Sbrian# include "c1_globals_sparc.hpp" 11576195Sbrian#endif 11676195Sbrian#ifdef TARGET_ARCH_arm 11776195Sbrian# include "c1_globals_arm.hpp" 11876195Sbrian#endif 11976195Sbrian#ifdef TARGET_ARCH_aarch64 12076195Sbrian# include "c1_globals_aarch64.hpp" 12176195Sbrian#endif 12276195Sbrian#ifdef TARGET_OS_FAMILY_linux 12376195Sbrian# include "c1_globals_linux.hpp" 12476195Sbrian#endif 12576195Sbrian#ifdef TARGET_OS_FAMILY_solaris 12676195Sbrian# include "c1_globals_solaris.hpp" 12776195Sbrian#endif 12876195Sbrian#ifdef TARGET_OS_FAMILY_windows 12976195Sbrian# include "c1_globals_windows.hpp" 13076195Sbrian#endif 131136200Sphk#ifdef TARGET_OS_FAMILY_aix 132126080Sphk# include "c1_globals_aix.hpp" 133136200Sphk#endif 134136200Sphk#ifdef TARGET_OS_FAMILY_bsd 135136200Sphk# include "c1_globals_bsd.hpp" 136111815Sphk#endif 137126080Sphk#ifdef TARGET_ARCH_ppc 13876195Sbrian# include "c1_globals_ppc.hpp" 13976195Sbrian#endif 14076195Sbrian#endif 14176195Sbrian#ifdef COMPILER2 14276195Sbrian#ifdef TARGET_ARCH_x86 14376195Sbrian# include "c2_globals_x86.hpp" 14476195Sbrian#endif 14576195Sbrian#ifdef TARGET_ARCH_sparc 14676195Sbrian# include "c2_globals_sparc.hpp" 14776195Sbrian#endif 14876195Sbrian#ifdef TARGET_ARCH_arm 14976195Sbrian# include "c2_globals_arm.hpp" 15076195Sbrian#endif 15176195Sbrian#ifdef TARGET_ARCH_ppc 15276195Sbrian# include "c2_globals_ppc.hpp" 15376195Sbrian#endif 15476195Sbrian#ifdef TARGET_ARCH_aarch64 15576195Sbrian# include "c2_globals_aarch64.hpp" 15676195Sbrian#endif 15776195Sbrian#ifdef TARGET_OS_FAMILY_linux 15876195Sbrian# include "c2_globals_linux.hpp" 15976195Sbrian#endif 16076195Sbrian#ifdef TARGET_OS_FAMILY_solaris 16176195Sbrian# include "c2_globals_solaris.hpp" 16276195Sbrian#endif 16376195Sbrian#ifdef TARGET_OS_FAMILY_windows 16476195Sbrian# include "c2_globals_windows.hpp" 16576195Sbrian#endif 16676195Sbrian#ifdef TARGET_OS_FAMILY_aix 16776195Sbrian# include "c2_globals_aix.hpp" 16876195Sbrian#endif 16976195Sbrian#ifdef TARGET_OS_FAMILY_bsd 17076195Sbrian# include "c2_globals_bsd.hpp" 17176195Sbrian#endif 17276195Sbrian#endif 17376195Sbrian#ifdef SHARK 17476195Sbrian#ifdef TARGET_ARCH_zero 17576195Sbrian# include "shark_globals_zero.hpp" 17676195Sbrian#endif 17776195Sbrian#endif 17876195Sbrian 17976195Sbrian#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) 18076195Sbriandefine_pd_global(bool, BackgroundCompilation, false); 18176195Sbriandefine_pd_global(bool, UseTLAB, false); 18276195Sbriandefine_pd_global(bool, CICompileOSR, false); 18376195Sbriandefine_pd_global(bool, UseTypeProfile, false); 18476195Sbriandefine_pd_global(bool, UseOnStackReplacement, false); 18576195Sbriandefine_pd_global(bool, InlineIntrinsics, false); 18676195Sbriandefine_pd_global(bool, PreferInterpreterNativeStubs, true); 18776195Sbriandefine_pd_global(bool, ProfileInterpreter, false); 18876195Sbriandefine_pd_global(bool, ProfileTraps, false); 18976195Sbriandefine_pd_global(bool, TieredCompilation, false); 19076195Sbrian 19176195Sbriandefine_pd_global(intx, CompileThreshold, 0); 19276195Sbrian 19376195Sbriandefine_pd_global(intx, OnStackReplacePercentage, 0); 19476195Sbriandefine_pd_global(bool, ResizeTLAB, false); 19576195Sbriandefine_pd_global(intx, FreqInlineSize, 0); 19676195Sbriandefine_pd_global(size_t, NewSizeThreadIncrease, 4*K); 19776195Sbriandefine_pd_global(intx, InlineClassNatives, true); 19876195Sbriandefine_pd_global(intx, InlineUnsafeOps, true); 19976195Sbriandefine_pd_global(intx, InitialCodeCacheSize, 160*K); 20076195Sbriandefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 20176195Sbriandefine_pd_global(intx, NonProfiledCodeHeapSize, 0); 20294358Sbriandefine_pd_global(intx, ProfiledCodeHeapSize, 0); 20394361Sbriandefine_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 20494340Sbrian 20594340Sbriandefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 20694361Sbriandefine_pd_global(intx, CodeCacheMinBlockLength, 1); 20794340Sbriandefine_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 20894361Sbriandefine_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 20994340Sbriandefine_pd_global(bool, NeverActAsServerClassMachine, true); 21094340Sbriandefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 21176195Sbrian#define CI_COMPILER_COUNT 0 21276195Sbrian#else 21376195Sbrian 21476195Sbrian#ifdef COMPILER2 21576195Sbrian#define CI_COMPILER_COUNT 2 21676195Sbrian#else 21776195Sbrian#define CI_COMPILER_COUNT 1 21876195Sbrian#endif // COMPILER2 219136200Sphk 22076195Sbrian#endif // no compilers 22176195Sbrian 22276195Sbrian// string type aliases used only in this file 22376195Sbriantypedef const char* ccstr; 22476195Sbriantypedef const char* ccstrlist; // represents string arguments which accumulate 22576195Sbrian 22676195Sbrianstruct Flag { 22776195Sbrian enum Flags { 22876195Sbrian // value origin 22976195Sbrian DEFAULT = 0, 23076195Sbrian COMMAND_LINE = 1, 23176195Sbrian ENVIRON_VAR = 2, 23276195Sbrian CONFIG_FILE = 3, 23376195Sbrian MANAGEMENT = 4, 23476195Sbrian ERGONOMIC = 5, 23576195Sbrian ATTACH_ON_DEMAND = 6, 23676195Sbrian INTERNAL = 7, 23776195Sbrian 23876195Sbrian LAST_VALUE_ORIGIN = INTERNAL, 23976195Sbrian VALUE_ORIGIN_BITS = 4, 24076195Sbrian VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 24176195Sbrian 24276195Sbrian // flag kind 24376195Sbrian KIND_PRODUCT = 1 << 4, 24476195Sbrian KIND_MANAGEABLE = 1 << 5, 24576195Sbrian KIND_DIAGNOSTIC = 1 << 6, 24676195Sbrian KIND_EXPERIMENTAL = 1 << 7, 24776195Sbrian KIND_NOT_PRODUCT = 1 << 8, 24876195Sbrian KIND_DEVELOP = 1 << 9, 24976195Sbrian KIND_PLATFORM_DEPENDENT = 1 << 10, 25076195Sbrian KIND_READ_WRITE = 1 << 11, 25176195Sbrian KIND_C1 = 1 << 12, 25276195Sbrian KIND_C2 = 1 << 13, 25376195Sbrian KIND_ARCH = 1 << 14, 25476195Sbrian KIND_SHARK = 1 << 15, 25576195Sbrian KIND_LP64_PRODUCT = 1 << 16, 25676195Sbrian KIND_COMMERCIAL = 1 << 17, 25776195Sbrian 25876195Sbrian KIND_MASK = ~VALUE_ORIGIN_MASK 25976195Sbrian }; 26076195Sbrian 26176195Sbrian enum Error { 26276195Sbrian // no error 26376195Sbrian SUCCESS = 0, 26476195Sbrian // flag name is missing 26576195Sbrian MISSING_NAME, 26676195Sbrian // flag value is missing 26776195Sbrian MISSING_VALUE, 26876195Sbrian // error parsing the textual form of the value 26976195Sbrian WRONG_FORMAT, 27076195Sbrian // flag is not writeable 27176195Sbrian NON_WRITABLE, 27276195Sbrian // flag value is outside of its bounds 27376195Sbrian OUT_OF_BOUNDS, 27476195Sbrian // flag value violates its constraint 27576195Sbrian VIOLATES_CONSTRAINT, 27676195Sbrian // there is no flag with the given name 27776195Sbrian INVALID_FLAG, 27876195Sbrian // other, unspecified error related to setting the flag 27976195Sbrian ERR_OTHER 28076195Sbrian }; 28176195Sbrian 28276195Sbrian const char* _type; 28376195Sbrian const char* _name; 28476195Sbrian void* _addr; 28576195Sbrian NOT_PRODUCT(const char* _doc;) 28676195Sbrian Flags _flags; 28776195Sbrian 28876195Sbrian // points to all Flags static array 28994323Sbrian static Flag* flags; 29076195Sbrian 29176195Sbrian // number of flags 29276195Sbrian static size_t numFlags; 29376195Sbrian 29494323Sbrian static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 29576195Sbrian static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 29694949Sbrian static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 29794323Sbrian 29894323Sbrian void check_writable(); 29976195Sbrian 30076195Sbrian bool is_bool() const; 30194361Sbrian bool get_bool() const; 30276195Sbrian void set_bool(bool value); 30376195Sbrian 30476195Sbrian bool is_int() const; 30576195Sbrian int get_int() const; 30676195Sbrian void set_int(int value); 30776195Sbrian 30876195Sbrian bool is_uint() const; 30976195Sbrian uint get_uint() const; 31076195Sbrian void set_uint(uint value); 31176195Sbrian 31276195Sbrian bool is_intx() const; 31376195Sbrian intx get_intx() const; 31476195Sbrian void set_intx(intx value); 31576195Sbrian 31676195Sbrian bool is_uintx() const; 31776195Sbrian uintx get_uintx() const; 31876195Sbrian void set_uintx(uintx value); 31976195Sbrian 32076195Sbrian bool is_uint64_t() const; 32176195Sbrian uint64_t get_uint64_t() const; 32276195Sbrian void set_uint64_t(uint64_t value); 32376195Sbrian 32476195Sbrian bool is_size_t() const; 32576195Sbrian size_t get_size_t() const; 32676195Sbrian void set_size_t(size_t value); 32776195Sbrian 32876195Sbrian bool is_double() const; 32976195Sbrian double get_double() const; 33076195Sbrian void set_double(double value); 33176195Sbrian 33276195Sbrian bool is_ccstr() const; 33376195Sbrian bool ccstr_accumulates() const; 33476195Sbrian ccstr get_ccstr() const; 33576195Sbrian void set_ccstr(ccstr value); 33676195Sbrian 33776195Sbrian Flags get_origin(); 33876195Sbrian void set_origin(Flags origin); 33994323Sbrian 34076195Sbrian bool is_default(); 34176195Sbrian bool is_ergonomic(); 34276195Sbrian bool is_command_line(); 34376195Sbrian 34476195Sbrian bool is_product() const; 34576195Sbrian bool is_manageable() const; 34676195Sbrian bool is_diagnostic() const; 34776195Sbrian bool is_experimental() const; 34876195Sbrian bool is_notproduct() const; 34976195Sbrian bool is_develop() const; 35094323Sbrian bool is_read_write() const; 35176195Sbrian bool is_commercial() const; 35294949Sbrian 35376195Sbrian bool is_constant_in_binary() const; 35476195Sbrian 35576195Sbrian bool is_unlocker() const; 35676195Sbrian bool is_unlocked() const; 35794361Sbrian bool is_writeable() const; 35876195Sbrian bool is_external() const; 35976195Sbrian 36076195Sbrian bool is_unlocker_ext() const; 36176195Sbrian bool is_unlocked_ext() const; 36276195Sbrian bool is_writeable_ext() const; 363150132Sandre bool is_external_ext() const; 36476195Sbrian 36576195Sbrian void unlock_diagnostic(); 36676195Sbrian 36776195Sbrian void get_locked_message(char*, int) const; 36876195Sbrian void get_locked_message_ext(char*, int) const; 36994361Sbrian 37076195Sbrian // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 37176195Sbrian void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 37276195Sbrian void print_kind(outputStream* st); 37376195Sbrian void print_as_flag(outputStream* st); 37476195Sbrian 37576195Sbrian static const char* flag_error_str(Flag::Error error) { 37676195Sbrian switch (error) { 37776195Sbrian case Flag::MISSING_NAME: return "MISSING_NAME"; 37876195Sbrian case Flag::MISSING_VALUE: return "MISSING_VALUE"; 37976195Sbrian case Flag::NON_WRITABLE: return "NON_WRITABLE"; 38076195Sbrian case Flag::OUT_OF_BOUNDS: return "OUT_OF_BOUNDS"; 38176195Sbrian case Flag::VIOLATES_CONSTRAINT: return "VIOLATES_CONSTRAINT"; 38276195Sbrian case Flag::INVALID_FLAG: return "INVALID_FLAG"; 38376195Sbrian case Flag::ERR_OTHER: return "ERR_OTHER"; 38476195Sbrian case Flag::SUCCESS: return "SUCCESS"; 38576195Sbrian default: return "NULL"; 38676195Sbrian } 38776195Sbrian } 38876195Sbrian}; 38976195Sbrian 39076195Sbrian// debug flags control various aspects of the VM and are global accessible 39176195Sbrian 39276195Sbrian// use FlagSetting to temporarily change some debug flag 39376195Sbrian// e.g. FlagSetting fs(DebugThisAndThat, true); 39476195Sbrian// restored to previous value upon leaving scope 39576195Sbrianclass FlagSetting { 39676195Sbrian bool val; 39776195Sbrian bool* flag; 39876195Sbrian public: 39976195Sbrian FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 40076195Sbrian ~FlagSetting() { *flag = val; } 40176195Sbrian}; 40276195Sbrian 40394949Sbrian 40476195Sbrianclass CounterSetting { 40576195Sbrian intx* counter; 40676195Sbrian public: 40776195Sbrian CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 40876195Sbrian ~CounterSetting() { (*counter)--; } 40994361Sbrian}; 41076195Sbrian 41176195Sbrianclass IntFlagSetting { 41276195Sbrian int val; 41376195Sbrian int* flag; 41476195Sbrian public: 41576195Sbrian IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 41676195Sbrian ~IntFlagSetting() { *flag = val; } 41776195Sbrian}; 41876195Sbrian 41976195Sbrianclass UIntFlagSetting { 42076195Sbrian uint val; 42176195Sbrian uint* flag; 42276195Sbrian public: 42376195Sbrian UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 42476195Sbrian ~UIntFlagSetting() { *flag = val; } 42576195Sbrian}; 42676195Sbrian 42776195Sbrianclass UIntXFlagSetting { 42876195Sbrian uintx val; 42976195Sbrian uintx* flag; 43076195Sbrian public: 43176195Sbrian UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 43276195Sbrian ~UIntXFlagSetting() { *flag = val; } 43376195Sbrian}; 43476195Sbrian 43576195Sbrianclass DoubleFlagSetting { 43676195Sbrian double val; 43776195Sbrian double* flag; 43876195Sbrian public: 43976195Sbrian DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 44076195Sbrian ~DoubleFlagSetting() { *flag = val; } 44176195Sbrian}; 44276195Sbrian 44376195Sbrianclass SizeTFlagSetting { 44476195Sbrian size_t val; 44576195Sbrian size_t* flag; 44676195Sbrian public: 44776195Sbrian SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 44876195Sbrian ~SizeTFlagSetting() { *flag = val; } 44976195Sbrian}; 45076195Sbrian 45176195Sbrian 45276195Sbrianclass CommandLineFlags { 45376195Sbrian static bool _finished_initializing; 45476195Sbrianpublic: 45576195Sbrian static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 45676195Sbrian 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); } 45776195Sbrian static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 45876195Sbrian static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 45976195Sbrian 46076195Sbrian static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 46176195Sbrian 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); } 46276195Sbrian static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 46376195Sbrian static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 46476195Sbrian 46576195Sbrian static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 46676195Sbrian 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); } 46776195Sbrian static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 46876195Sbrian static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 46976195Sbrian 47076195Sbrian static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 47176195Sbrian 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); } 47276195Sbrian static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 47376195Sbrian static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 47476195Sbrian 47576195Sbrian static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 47676195Sbrian 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); } 47776195Sbrian static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 47876195Sbrian static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 47976195Sbrian 48076195Sbrian static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 48176195Sbrian 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); } 48276195Sbrian static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 48376195Sbrian static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 48476195Sbrian 48576195Sbrian static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 48676195Sbrian 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); } 48776195Sbrian static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 48894949Sbrian static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 48976195Sbrian 49076195Sbrian static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 49176195Sbrian 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); } 49276195Sbrian static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 49376195Sbrian static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 49476195Sbrian 49594361Sbrian static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 49676195Sbrian 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); } 49776195Sbrian // Contract: Flag will make private copy of the incoming value. 49876195Sbrian // Outgoing value is always malloc-ed, and caller MUST call free. 49976195Sbrian static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 50076195Sbrian static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 50176195Sbrian 50276195Sbrian // Returns false if name is not a command line flag. 50376195Sbrian static bool wasSetOnCmdline(const char* name, bool* value); 50476195Sbrian static void printSetFlags(outputStream* out); 50576195Sbrian 50676195Sbrian // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 50776195Sbrian static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 50876195Sbrian 50976195Sbrian // Returns true if all flags have their final values set (ready for ranges and constraint check) 51076195Sbrian static bool finishedInitializing() { return _finished_initializing; } 51176195Sbrian 51276195Sbrian // Check the final values of all flags for ranges and constraints 51376195Sbrian static bool check_all_ranges_and_constraints(); 51476195Sbrian 51576195Sbrian static void verify() PRODUCT_RETURN; 516136200Sphk}; 51776195Sbrian 51876195Sbrian// use this for flags that are true by default in the debug version but 51976195Sbrian// false in the optimized version, and vice versa 52077004Sbrian#ifdef ASSERT 521111119Simp#define trueInDebug true 52276195Sbrian#define falseInDebug false 52376195Sbrian#else 52476195Sbrian#define trueInDebug false 52576195Sbrian#define falseInDebug true 52676195Sbrian#endif 52776195Sbrian 52876195Sbrian// use this for flags that are true per default in the product build 52976195Sbrian// but false in development builds, and vice versa 53076195Sbrian#ifdef PRODUCT 53176195Sbrian#define trueInProduct true 53276195Sbrian#define falseInProduct false 53376195Sbrian#else 53476195Sbrian#define trueInProduct false 53576195Sbrian#define falseInProduct true 53676195Sbrian#endif 53776195Sbrian 53876195Sbrian#ifdef JAVASE_EMBEDDED 53976195Sbrian#define falseInEmbedded false 54076195Sbrian#else 54176195Sbrian#define falseInEmbedded true 54276195Sbrian#endif 543136200Sphk 544136200Sphk// develop flags are settable / visible only during development and are constant in the PRODUCT version 545136200Sphk// product flags are always settable / visible 546136200Sphk// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 547136200Sphk 548136200Sphk// A flag must be declared with one of the following types: 549136200Sphk// bool, intx, uintx, size_t, ccstr, double, or uint64_t. 550136200Sphk// The type "ccstr" is an alias for "const char*" and is used 551136200Sphk// only in this file, because the macrology requires single-token type names. 552136200Sphk 553136200Sphk// Note: Diagnostic options not meant for VM tuning or for product modes. 55476195Sbrian// They are to be used for VM quality assurance or field diagnosis 55576195Sbrian// of VM bugs. They are hidden so that users will not be encouraged to 55676195Sbrian// try them as if they were VM ordinary execution options. However, they 55776195Sbrian// are available in the product version of the VM. Under instruction 55876195Sbrian// from support engineers, VM customers can turn them on to collect 55976195Sbrian// diagnostic information about VM problems. To use a VM diagnostic 56076195Sbrian// option, you must first specify +UnlockDiagnosticVMOptions. 56176195Sbrian// (This master switch also affects the behavior of -Xprintflags.) 56276195Sbrian// 56376195Sbrian// experimental flags are in support of features that are not 56476195Sbrian// part of the officially supported product, but are available 56576195Sbrian// for experimenting with. They could, for example, be performance 56676195Sbrian// features that may not have undergone full or rigorous QA, but which may 56776195Sbrian// help performance in some cases and released for experimentation 56876195Sbrian// by the community of users and developers. This flag also allows one to 56976195Sbrian// be able to build a fully supported product that nonetheless also 57076195Sbrian// ships with some unsupported, lightly tested, experimental features. 57176195Sbrian// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 57276195Sbrian// UnlockExperimentalVMOptions flag, which allows the control and 57376195Sbrian// modification of the experimental flags. 57476195Sbrian// 57576195Sbrian// Nota bene: neither diagnostic nor experimental options should be used casually, 57676195Sbrian// and they are not supported on production loads, except under explicit 57776195Sbrian// direction from support engineers. 57876195Sbrian// 57976195Sbrian// manageable flags are writeable external product flags. 58076195Sbrian// They are dynamically writeable through the JDK management interface 58176195Sbrian// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 58276195Sbrian// These flags are external exported interface (see CCC). The list of 58376195Sbrian// manageable flags can be queried programmatically through the management 58476195Sbrian// interface. 58576195Sbrian// 58676195Sbrian// A flag can be made as "manageable" only if 58776195Sbrian// - the flag is defined in a CCC as an external exported interface. 58876195Sbrian// - the VM implementation supports dynamic setting of the flag. 589136680Sphk// This implies that the VM must *always* query the flag variable 59076195Sbrian// and not reuse state related to the flag state at any given time. 591151383Sphk// - you want the flag to be queried programmatically by the customers. 59276195Sbrian// 59376195Sbrian// product_rw flags are writeable internal product flags. 59476195Sbrian// They are like "manageable" flags but for internal/private use. 59576195Sbrian// The list of product_rw flags are internal/private flags which 59676195Sbrian// may be changed/removed in a future release. It can be set 59776195Sbrian// through the management interface to get/set value 59876195Sbrian// when the name of flag is supplied. 59976195Sbrian// 60076195Sbrian// A flag can be made as "product_rw" only if 60176195Sbrian// - the VM implementation supports dynamic setting of the flag. 60276195Sbrian// This implies that the VM must *always* query the flag variable 603131095Sphk// and not reuse state related to the flag state at any given time. 60476195Sbrian// 605131095Sphk// Note that when there is a need to support develop flags to be writeable, 606131095Sphk// it can be done in the same way as product_rw. 607131095Sphk// 60876195Sbrian// range is a macro that will expand to min and max arguments for range 609136200Sphk// checking code if provided - see commandLineFlagRangeList.hpp 610136200Sphk// 611131095Sphk// constraint is a macro that will expand to custom function call 612131095Sphk// for constraint checking if provided - see commandLineFlagConstraintList.hpp 61376195Sbrian// 61476195Sbrian 61576195Sbrian#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 61676195Sbrian \ 617131095Sphk lp64_product(bool, UseCompressedOops, false, \ 61878496Sbrian "Use 32-bit object references in 64-bit VM. " \ 619131095Sphk "lp64_product means flag is always constant in 32 bit VM") \ 62078496Sbrian \ 621131095Sphk lp64_product(bool, UseCompressedClassPointers, false, \ 62276195Sbrian "Use 32-bit class pointers in 64-bit VM. " \ 623131095Sphk "lp64_product means flag is always constant in 32 bit VM") \ 62476195Sbrian \ 625131095Sphk notproduct(bool, CheckCompressedOops, true, \ 62676195Sbrian "Generate checks in encoding/decoding code in debug VM") \ 627131095Sphk \ 628131095Sphk product_pd(size_t, HeapBaseMinAddress, \ 62976195Sbrian "OS specific low limit for heap base address") \ 63076195Sbrian \ 631131095Sphk product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 632131095Sphk "Heap allocation steps through preferred address regions to find" \ 63376195Sbrian " where it can allocate the heap. Number of steps to take per " \ 634131095Sphk "region.") \ 635131095Sphk range(1, max_uintx) \ 636131095Sphk \ 637131095Sphk diagnostic(bool, PrintCompressedOopsMode, false, \ 638131095Sphk "Print compressed oops base address and encoding mode") \ 639131095Sphk \ 640131095Sphk lp64_product(intx, ObjectAlignmentInBytes, 8, \ 641131095Sphk "Default object alignment in bytes, 8 is minimum") \ 642131095Sphk range(8, 256) \ 64376195Sbrian constraint(ObjectAlignmentInBytesConstraintFunc) \ 64476195Sbrian \ 64576195Sbrian product(bool, AssumeMP, false, \ 646104094Sphk "Instruct the VM to assume multiple processors are available") \ 647136200Sphk \ 64876195Sbrian /* UseMembar is theoretically a temp flag used for memory barrier */ \ 64976195Sbrian /* removal testing. It was supposed to be removed before FCS but has */ \ 650136200Sphk /* been re-added (see 6401008) */ \ 651136200Sphk product_pd(bool, UseMembar, \ 652136200Sphk "(Unstable) Issues membars on thread state transitions") \ 653136200Sphk \ 654136200Sphk develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 655136200Sphk "Clean the chunk pool asynchronously") \ 656136200Sphk \ 657136200Sphk experimental(bool, AlwaysSafeConstructors, false, \ 658136200Sphk "Force safe construction, as if all fields are final.") \ 659136200Sphk \ 660136200Sphk /* Temporary: See 6948537 */ \ 661136200Sphk experimental(bool, UseMemSetInBOT, true, \ 662136200Sphk "(Unstable) uses memset in BOT updates in GC code") \ 663136200Sphk \ 664136200Sphk diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 66576195Sbrian "Enable normal processing of flags relating to field diagnostics")\ 66676195Sbrian \ 66776195Sbrian experimental(bool, UnlockExperimentalVMOptions, false, \ 668136200Sphk "Enable normal processing of flags relating to experimental " \ 669136200Sphk "features") \ 67076195Sbrian \ 67176195Sbrian product(bool, JavaMonitorsInStackTrace, true, \ 67276195Sbrian "Print information about Java monitor locks when the stacks are" \ 67376195Sbrian "dumped") \ 67476195Sbrian \ 67576195Sbrian product_pd(bool, UseLargePages, \ 67676195Sbrian "Use large page memory") \ 677136200Sphk \ 678136200Sphk product_pd(bool, UseLargePagesIndividualAllocation, \ 679136200Sphk "Allocate large pages individually for better affinity") \ 680136200Sphk \ 681136200Sphk develop(bool, LargePagesIndividualAllocationInjectError, false, \ 682136200Sphk "Fail large pages individual allocation") \ 683136200Sphk \ 68476195Sbrian product(bool, UseLargePagesInMetaspace, false, \ 685136200Sphk "Use large page memory in metaspace. " \ 686136200Sphk "Only used if UseLargePages is enabled.") \ 687136200Sphk \ 688136200Sphk develop(bool, TracePageSizes, false, \ 689136200Sphk "Trace page size selection and usage") \ 690136200Sphk \ 691136200Sphk product(bool, UseNUMA, false, \ 692136200Sphk "Use NUMA if available") \ 693136200Sphk \ 69476195Sbrian product(bool, UseNUMAInterleaving, false, \ 695136200Sphk "Interleave memory across NUMA nodes if available") \ 696136200Sphk \ 69776195Sbrian product(size_t, NUMAInterleaveGranularity, 2*M, \ 698136200Sphk "Granularity to use for NUMA interleaving on Windows OS") \ 699136200Sphk \ 700136200Sphk product(bool, ForceNUMA, false, \ 70176195Sbrian "Force NUMA optimizations on single-node/UMA systems") \ 70276195Sbrian \ 70376195Sbrian product(uintx, NUMAChunkResizeWeight, 20, \ 70476195Sbrian "Percentage (0-100) used to weight the current sample when " \ 705104094Sphk "computing exponentially decaying average for " \ 706136200Sphk "AdaptiveNUMAChunkSizing") \ 70776195Sbrian range(0, 100) \ 70876195Sbrian \ 70976195Sbrian product(size_t, NUMASpaceResizeRate, 1*G, \ 710136200Sphk "Do not reallocate more than this amount per collection") \ 711136200Sphk \ 71276195Sbrian product(bool, UseAdaptiveNUMAChunkSizing, true, \ 71376195Sbrian "Enable adaptive chunk sizing for NUMA") \ 71476195Sbrian \ 71576195Sbrian product(bool, NUMAStats, false, \ 71676195Sbrian "Print NUMA stats in detailed heap information") \ 71776195Sbrian \ 71876195Sbrian product(uintx, NUMAPageScanRate, 256, \ 71976195Sbrian "Maximum number of pages to include in the page scan procedure") \ 72076195Sbrian \ 721131981Sphk product_pd(bool, NeedsDeoptSuspend, \ 722136200Sphk "True for register window machines (sparc/ia64)") \ 72376195Sbrian \ 72476195Sbrian product(intx, UseSSE, 99, \ 72576195Sbrian "Highest supported SSE instructions set on x86/x64") \ 726136200Sphk \ 72776195Sbrian product(bool, UseAES, false, \ 72876195Sbrian "Control whether AES instructions can be used on x86/x64") \ 729136200Sphk \ 73076195Sbrian product(bool, UseSHA, false, \ 73176195Sbrian "Control whether SHA instructions can be used on SPARC") \ 732136200Sphk \ 73376195Sbrian product(size_t, LargePageSizeInBytes, 0, \ 73476195Sbrian "Large page size (0 to let VM choose the page size)") \ 73576195Sbrian \ 73676195Sbrian product(size_t, LargePageHeapSizeThreshold, 128*M, \ 73776195Sbrian "Use large pages if maximum heap is at least this big") \ 73876195Sbrian \ 73976195Sbrian product(bool, ForceTimeHighResolution, false, \ 74076195Sbrian "Using high time resolution (for Win32 only)") \ 741136200Sphk \ 742136200Sphk develop(bool, TraceItables, false, \ 743136200Sphk "Trace initialization and use of itables") \ 744136200Sphk \ 745136200Sphk develop(bool, TracePcPatching, false, \ 746136200Sphk "Trace usage of frame::patch_pc") \ 74776195Sbrian \ 748136200Sphk develop(bool, TraceJumps, false, \ 749136200Sphk "Trace assembly jumps in thread ring buffer") \ 75076195Sbrian \ 75176195Sbrian develop(bool, TraceRelocator, false, \ 75276195Sbrian "Trace the bytecode relocator") \ 753136200Sphk \ 754136200Sphk develop(bool, TraceLongCompiles, false, \ 755136200Sphk "Print out every time compilation is longer than " \ 75676195Sbrian "a given threshold") \ 75776195Sbrian \ 75876195Sbrian develop(bool, SafepointALot, false, \ 75976195Sbrian "Generate a lot of safepoints. This works with " \ 76076195Sbrian "GuaranteedSafepointInterval") \ 76176195Sbrian \ 76276195Sbrian product_pd(bool, BackgroundCompilation, \ 76376195Sbrian "A thread requesting compilation is not blocked during " \ 76476195Sbrian "compilation") \ 76576195Sbrian \ 76676195Sbrian product(bool, PrintVMQWaitTime, false, \ 76776195Sbrian "Print out the waiting time in VM operation queue") \ 76876195Sbrian \ 76976195Sbrian develop(bool, TraceOopMapGeneration, false, \ 77076195Sbrian "Show OopMapGeneration") \ 77176195Sbrian \ 77276195Sbrian product(bool, MethodFlushing, true, \ 77376195Sbrian "Reclamation of zombie and not-entrant methods") \ 77476195Sbrian \ 77576195Sbrian develop(bool, VerifyStack, false, \ 77678414Sbrian "Verify stack of each thread when it is entering a runtime call") \ 77776195Sbrian \ 77876195Sbrian diagnostic(bool, ForceUnreachable, false, \ 77976195Sbrian "Make all non code cache addresses to be unreachable by " \ 78076195Sbrian "forcing use of 64bit literal fixups") \ 78176195Sbrian \ 78276195Sbrian notproduct(bool, StressDerivedPointers, false, \ 78378414Sbrian "Force scavenge when a derived pointer is detected on stack " \ 784111119Simp "after rtm call") \ 78578414Sbrian \ 786132806Sphk develop(bool, TraceDerivedPointers, false, \ 787132806Sphk "Trace traversal of derived pointers on stack") \ 788132806Sphk \ 78976195Sbrian notproduct(bool, TraceCodeBlobStacks, false, \ 79076195Sbrian "Trace stack-walk of codeblobs") \ 79176195Sbrian \ 79276195Sbrian product(bool, PrintJNIResolving, false, \ 793111119Simp "Used to implement -v:jni") \ 79478414Sbrian \ 795142506Ssam notproduct(bool, PrintRewrites, false, \ 796142506Ssam "Print methods that are being rewritten") \ 797142506Ssam \ 79876195Sbrian product(bool, UseInlineCaches, true, \ 799142506Ssam "Use Inline Caches for virtual calls ") \ 800142506Ssam \ 801142506Ssam develop(bool, InlineArrayCopy, true, \ 80276195Sbrian "Inline arraycopy native that is known to be part of " \ 80376195Sbrian "base library DLL") \ 80476195Sbrian \ 80576195Sbrian develop(bool, InlineObjectHash, true, \ 80676195Sbrian "Inline Object::hashCode() native that is known to be part " \ 807132117Sphk "of base library DLL") \ 80876195Sbrian \ 80976195Sbrian develop(bool, InlineNatives, true, \ 81076195Sbrian "Inline natives that are known to be part of base library DLL") \ 81176195Sbrian \ 81276195Sbrian develop(bool, InlineMathNatives, true, \ 813111119Simp "Inline SinD, CosD, etc.") \ 81476195Sbrian \ 81576195Sbrian develop(bool, InlineClassNatives, true, \ 81676195Sbrian "Inline Class.isInstance, etc") \ 81776195Sbrian \ 81876195Sbrian develop(bool, InlineThreadNatives, true, \ 819111119Simp "Inline Thread.currentThread, etc") \ 82076195Sbrian \ 82176195Sbrian develop(bool, InlineUnsafeOps, true, \ 82276195Sbrian "Inline memory ops (native methods) from sun.misc.Unsafe") \ 82376195Sbrian \ 82476195Sbrian product(bool, CriticalJNINatives, true, \ 825111119Simp "Check for critical JNI entry points") \ 82676195Sbrian \ 82776195Sbrian notproduct(bool, StressCriticalJNINatives, false, \ 82876195Sbrian "Exercise register saving code in critical natives") \ 829132117Sphk \ 83076195Sbrian product(bool, UseSSE42Intrinsics, false, \ 83176195Sbrian "SSE4.2 versions of intrinsics") \ 83276195Sbrian \ 83376195Sbrian product(bool, UseAESIntrinsics, false, \ 83476195Sbrian "Use intrinsics for AES versions of crypto") \ 835136200Sphk \ 83676195Sbrian product(bool, UseSHA1Intrinsics, false, \ 837136200Sphk "Use intrinsics for SHA-1 crypto hash function") \ 83876195Sbrian \ 83976195Sbrian product(bool, UseSHA256Intrinsics, false, \ 840136200Sphk "Use intrinsics for SHA-224 and SHA-256 crypto hash functions") \ 841136200Sphk \ 84276195Sbrian product(bool, UseSHA512Intrinsics, false, \ 843136200Sphk "Use intrinsics for SHA-384 and SHA-512 crypto hash functions") \ 844136200Sphk \ 845136200Sphk product(bool, UseCRC32Intrinsics, false, \ 846136200Sphk "use intrinsics for java.util.zip.CRC32") \ 847136200Sphk \ 848136200Sphk develop(bool, TraceCallFixup, false, \ 849136200Sphk "Trace all call fixups") \ 850136200Sphk \ 851136200Sphk develop(bool, DeoptimizeALot, false, \ 852136200Sphk "Deoptimize at every exit from the runtime system") \ 853136200Sphk \ 854136200Sphk notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 855136200Sphk "A comma separated list of bcis to deoptimize at") \ 856136200Sphk \ 857136200Sphk product(bool, DeoptimizeRandom, false, \ 858136200Sphk "Deoptimize random frames on random exit from the runtime system")\ 859136200Sphk \ 860136200Sphk notproduct(bool, ZombieALot, false, \ 861136200Sphk "Create zombies (non-entrant) at exit from the runtime system") \ 862136200Sphk \ 863136200Sphk product(bool, UnlinkSymbolsALot, false, \ 864136200Sphk "Unlink unreferenced symbols from the symbol table at safepoints")\ 865136200Sphk \ 866136200Sphk notproduct(bool, WalkStackALot, false, \ 867136200Sphk "Trace stack (no print) at every exit from the runtime system") \ 868136200Sphk \ 869136200Sphk product(bool, Debugging, false, \ 870136200Sphk "Set when executing debug methods in debug.cpp " \ 871136200Sphk "(to prevent triggering assertions)") \ 872136200Sphk \ 87376195Sbrian notproduct(bool, StrictSafepointChecks, trueInDebug, \ 874136200Sphk "Enable strict checks that safepoints cannot happen for threads " \ 875136200Sphk "that use No_Safepoint_Verifier") \ 876136200Sphk \ 877136200Sphk notproduct(bool, VerifyLastFrame, false, \ 878136200Sphk "Verify oops on last frame on entry to VM") \ 879136200Sphk \ 880136200Sphk develop(bool, TraceHandleAllocation, false, \ 881136200Sphk "Print out warnings when suspiciously many handles are allocated")\ 88276195Sbrian \ 88376195Sbrian product(bool, FailOverToOldVerifier, true, \ 88476195Sbrian "Fail over to old verifier when split verifier fails") \ 885136200Sphk \ 886136200Sphk develop(bool, ShowSafepointMsgs, false, \ 88776195Sbrian "Show message about safepoint synchronization") \ 888136200Sphk \ 889136200Sphk product(bool, SafepointTimeout, false, \ 89076195Sbrian "Time out and warn or fail after SafepointTimeoutDelay " \ 891136200Sphk "milliseconds if failed to reach safepoint") \ 892136200Sphk \ 89376195Sbrian develop(bool, DieOnSafepointTimeout, false, \ 894136200Sphk "Die upon failure to reach safepoint (see SafepointTimeout)") \ 895136200Sphk \ 896136200Sphk /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 897136200Sphk /* typically, at most a few retries are needed */ \ 898136200Sphk product(intx, SuspendRetryCount, 50, \ 89976195Sbrian "Maximum retry count for an external suspend request") \ 900136200Sphk \ 901136200Sphk product(intx, SuspendRetryDelay, 5, \ 902136200Sphk "Milliseconds to delay per retry (* current_retry_count)") \ 90376195Sbrian \ 904136200Sphk product(bool, AssertOnSuspendWaitFailure, false, \ 905136200Sphk "Assert/Guarantee on external suspend wait failure") \ 906136200Sphk \ 907136200Sphk product(bool, TraceSuspendWaitFailures, false, \ 908136200Sphk "Trace external suspend wait failures") \ 90976195Sbrian \ 910136200Sphk product(bool, MaxFDLimit, true, \ 91176195Sbrian "Bump the number of file descriptors to maximum in Solaris") \ 912136200Sphk \ 913136200Sphk diagnostic(bool, LogEvents, true, \ 914136200Sphk "Enable the various ring buffer event logs") \ 915136200Sphk \ 916136200Sphk diagnostic(uintx, LogEventsBufferEntries, 10, \ 917136200Sphk "Number of ring buffer event logs") \ 918136200Sphk range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 919136200Sphk \ 920136200Sphk product(bool, BytecodeVerificationRemote, true, \ 92176195Sbrian "Enable the Java bytecode verifier for remote classes") \ 92276195Sbrian \ 92376195Sbrian product(bool, BytecodeVerificationLocal, false, \ 92476195Sbrian "Enable the Java bytecode verifier for local classes") \ 92576195Sbrian \ 92678496Sbrian develop(bool, ForceFloatExceptions, trueInDebug, \ 92778496Sbrian "Force exceptions on FP stack under/overflow") \ 92878496Sbrian \ 92978496Sbrian develop(bool, VerifyStackAtCalls, false, \ 93078496Sbrian "Verify that the stack pointer is unchanged after calls") \ 93178496Sbrian \ 93278496Sbrian develop(bool, TraceJavaAssertions, false, \ 93378496Sbrian "Trace java language assertions") \ 93478496Sbrian \ 935136200Sphk notproduct(bool, CheckAssertionStatusDirectives, false, \ 93678496Sbrian "Temporary - see javaClasses.cpp") \ 93778496Sbrian \ 93878496Sbrian notproduct(bool, PrintMallocFree, false, \ 93978496Sbrian "Trace calls to C heap malloc/free allocation") \ 940136200Sphk \ 94178496Sbrian product(bool, PrintOopAddress, false, \ 94278496Sbrian "Always print the location of the oop") \ 94378496Sbrian \ 94478496Sbrian notproduct(bool, VerifyCodeCache, false, \ 94578496Sbrian "Verify code cache on memory allocation/deallocation") \ 94676195Sbrian \ 94776195Sbrian develop(bool, ZapDeadCompiledLocals, false, \ 94876195Sbrian "Zap dead locals in compiler frames") \ 94976195Sbrian \ 95076195Sbrian notproduct(bool, ZapDeadLocalsOld, false, \ 95176195Sbrian "Zap dead locals (old version, zaps all frames when " \ 95276195Sbrian "entering the VM") \ 95376195Sbrian \ 95476195Sbrian notproduct(bool, CheckOopishValues, false, \ 955131373Sphk "Warn if value contains oop (requires ZapDeadLocals)") \ 956131095Sphk \ 957131095Sphk develop(bool, UseMallocOnly, false, \ 958131095Sphk "Use only malloc/free for allocation (no resource area/arena)") \ 959131095Sphk \ 960136200Sphk develop(bool, PrintMalloc, false, \ 961131095Sphk "Print all malloc/free calls") \ 962131095Sphk \ 963131095Sphk develop(bool, PrintMallocStatistics, false, \ 964131095Sphk "Print malloc/free statistics") \ 965131095Sphk \ 966131095Sphk develop(bool, ZapResourceArea, trueInDebug, \ 967131095Sphk "Zap freed resource/arena space with 0xABABABAB") \ 968131095Sphk \ 969131095Sphk notproduct(bool, ZapVMHandleArea, trueInDebug, \ 970131095Sphk "Zap freed VM handle space with 0xBCBCBCBC") \ 97176195Sbrian \ 97276195Sbrian develop(bool, ZapJNIHandleArea, trueInDebug, \ 97376195Sbrian "Zap freed JNI handle space with 0xFEFEFEFE") \ 97476195Sbrian \ 97576195Sbrian notproduct(bool, ZapStackSegments, trueInDebug, \ 97676195Sbrian "Zap allocated/freed stack segments with 0xFADFADED") \ 97776195Sbrian \ 97876195Sbrian develop(bool, ZapUnusedHeapArea, trueInDebug, \ 97976195Sbrian "Zap unused heap space with 0xBAADBABE") \ 98076195Sbrian \ 981136200Sphk develop(bool, TraceZapUnusedHeapArea, false, \ 982136200Sphk "Trace zapping of unused heap space") \ 983136200Sphk \ 98476195Sbrian develop(bool, CheckZapUnusedHeapArea, false, \ 98576195Sbrian "Check zapping of unused heap space") \ 98676195Sbrian \ 98776195Sbrian develop(bool, ZapFillerObjects, trueInDebug, \ 98876195Sbrian "Zap filler objects with 0xDEAFBABE") \ 98976195Sbrian \ 99076195Sbrian develop(bool, PrintVMMessages, true, \ 99176195Sbrian "Print VM messages on console") \ 99276195Sbrian \ 99376195Sbrian product(bool, PrintGCApplicationConcurrentTime, false, \ 99476195Sbrian "Print the time the application has been running") \ 99576195Sbrian \ 99676195Sbrian product(bool, PrintGCApplicationStoppedTime, false, \ 99776195Sbrian "Print the time the application has been stopped") \ 99876195Sbrian \ 999136200Sphk diagnostic(bool, VerboseVerification, false, \ 1000131095Sphk "Display detailed verification details") \ 100176195Sbrian \ 1002131095Sphk notproduct(uintx, ErrorHandlerTest, 0, \ 100376195Sbrian "If > 0, provokes an error after VM initialization; the value " \ 1004136200Sphk "determines which error to provoke. See test_error_handler() " \ 100576195Sbrian "in debug.cpp.") \ 100676195Sbrian \ 100776195Sbrian notproduct(uintx, TestCrashInErrorHandler, 0, \ 100876195Sbrian "If > 0, provokes an error inside VM error handler (a secondary " \ 100976195Sbrian "crash). see test_error_handler() in debug.cpp.") \ 101076195Sbrian \ 101176195Sbrian notproduct(bool, TestSafeFetchInErrorHandler, false, \ 101276195Sbrian "If true, tests SafeFetch inside error handler.") \ 101376195Sbrian \ 101476195Sbrian develop(bool, Verbose, false, \ 101576195Sbrian "Print additional debugging information from other modes") \ 101676195Sbrian \ 101776195Sbrian develop(bool, PrintMiscellaneous, false, \ 101876195Sbrian "Print uncategorized debugging information (requires +Verbose)") \ 101976195Sbrian \ 102076195Sbrian develop(bool, WizardMode, false, \ 102176195Sbrian "Print much more debugging information") \ 102276195Sbrian \ 102376195Sbrian product(bool, ShowMessageBoxOnError, false, \ 102476195Sbrian "Keep process alive on VM fatal error") \ 102576195Sbrian \ 102676195Sbrian product(bool, CreateCoredumpOnCrash, true, \ 102776195Sbrian "Create core/mini dump on VM fatal error") \ 1028136200Sphk \ 102976195Sbrian product_pd(bool, UseOSErrorReporting, \ 103076195Sbrian "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 103176195Sbrian \ 103276195Sbrian product(bool, SuppressFatalErrorMessage, false, \ 103376195Sbrian "Report NO fatal error message (avoid deadlock)") \ 103476195Sbrian \ 103576195Sbrian product(ccstrlist, OnError, "", \ 103676195Sbrian "Run user-defined commands on fatal error; see VMError.cpp " \ 103776195Sbrian "for examples") \ 103876195Sbrian \ 103976195Sbrian product(ccstrlist, OnOutOfMemoryError, "", \ 104076195Sbrian "Run user-defined commands on first java.lang.OutOfMemoryError") \ 104176195Sbrian \ 1042136200Sphk manageable(bool, HeapDumpBeforeFullGC, false, \ 104376195Sbrian "Dump heap to file before any major stop-the-world GC") \ 104476195Sbrian \ 104576195Sbrian manageable(bool, HeapDumpAfterFullGC, false, \ 104676195Sbrian "Dump heap to file after any major stop-the-world GC") \ 104776195Sbrian \ 104876195Sbrian manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 104976195Sbrian "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 105076195Sbrian \ 105176195Sbrian manageable(ccstr, HeapDumpPath, NULL, \ 105276195Sbrian "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 105378496Sbrian "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 105476195Sbrian "in the working directory)") \ 105578496Sbrian \ 105676195Sbrian develop(size_t, SegmentedHeapDumpThreshold, 2*G, \ 1057136200Sphk "Generate a segmented heap dump (JAVA PROFILE 1.0.2 format) " \ 105876195Sbrian "when the heap usage is larger than this") \ 105976195Sbrian \ 106076195Sbrian develop(size_t, HeapDumpSegmentSize, 1*G, \ 1061136200Sphk "Approximate segment size when generating a segmented heap dump") \ 106276195Sbrian \ 106376195Sbrian develop(bool, BreakAtWarning, false, \ 106476195Sbrian "Execute breakpoint upon encountering VM warning") \ 106576195Sbrian \ 106676195Sbrian develop(bool, TraceVMOperation, false, \ 106776195Sbrian "Trace VM operations") \ 106876195Sbrian \ 106976195Sbrian develop(bool, UseFakeTimers, false, \ 107076195Sbrian "Tell whether the VM should use system time or a fake timer") \ 107176195Sbrian \ 107276195Sbrian product(ccstr, NativeMemoryTracking, "off", \ 107376195Sbrian "Native memory tracking options") \ 107476195Sbrian \ 107576195Sbrian diagnostic(bool, PrintNMTStatistics, false, \ 107676195Sbrian "Print native memory tracking summary data if it is on") \ 107776195Sbrian \ 107876195Sbrian diagnostic(bool, LogCompilation, false, \ 107976195Sbrian "Log compilation activity in detail to LogFile") \ 108076195Sbrian \ 108176195Sbrian product(bool, PrintCompilation, false, \ 108276195Sbrian "Print compilations") \ 108376195Sbrian \ 108476195Sbrian diagnostic(bool, TraceNMethodInstalls, false, \ 108576195Sbrian "Trace nmethod installation") \ 108676195Sbrian \ 108776195Sbrian diagnostic(intx, ScavengeRootsInCode, 2, \ 108876195Sbrian "0: do not allow scavengable oops in the code cache; " \ 108976195Sbrian "1: allow scavenging from the code cache; " \ 109076195Sbrian "2: emit as many constants as the compiler can see") \ 109176195Sbrian range(0, 2) \ 109276195Sbrian \ 109376195Sbrian product(bool, AlwaysRestoreFPU, false, \ 109476195Sbrian "Restore the FPU control word after every JNI call (expensive)") \ 109576195Sbrian \ 109676195Sbrian diagnostic(bool, PrintCompilation2, false, \ 109776195Sbrian "Print additional statistics per compilation") \ 109876327Sbrian \ 109976195Sbrian diagnostic(bool, PrintAdapterHandlers, false, \ 110076195Sbrian "Print code generated for i2c/c2i adapters") \ 110176195Sbrian \ 110276195Sbrian diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 110376195Sbrian "Verify that i2c/c2i adapters are called properly") \ 110476195Sbrian \ 110576195Sbrian develop(bool, VerifyAdapterSharing, false, \ 110676195Sbrian "Verify that the code for shared adapters is the equivalent") \ 110776195Sbrian \ 110876195Sbrian diagnostic(bool, PrintAssembly, false, \ 110976195Sbrian "Print assembly code (using external disassembler.so)") \ 111076195Sbrian \ 111176195Sbrian diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 111276195Sbrian "Print options string passed to disassembler.so") \ 111376195Sbrian \ 111476195Sbrian diagnostic(bool, PrintNMethods, false, \ 111576195Sbrian "Print assembly code for nmethods when generated") \ 111676195Sbrian \ 111776195Sbrian diagnostic(bool, PrintNativeNMethods, false, \ 111876195Sbrian "Print assembly code for native nmethods when generated") \ 111976195Sbrian \ 112076195Sbrian develop(bool, PrintDebugInfo, false, \ 112176195Sbrian "Print debug information for all nmethods when generated") \ 112276195Sbrian \ 112376195Sbrian develop(bool, PrintRelocations, false, \ 112476195Sbrian "Print relocation information for all nmethods when generated") \ 112576195Sbrian \ 112676195Sbrian develop(bool, PrintDependencies, false, \ 112776195Sbrian "Print dependency information for all nmethods when generated") \ 112876195Sbrian \ 112976195Sbrian develop(bool, PrintExceptionHandlers, false, \ 113076195Sbrian "Print exception handler tables for all nmethods when generated") \ 113176195Sbrian \ 113276195Sbrian develop(bool, StressCompiledExceptionHandlers, false, \ 113376195Sbrian "Exercise compiled exception handlers") \ 113476195Sbrian \ 113576195Sbrian develop(bool, InterceptOSException, false, \ 113676195Sbrian "Start debugger when an implicit OS (e.g. NULL) " \ 113776195Sbrian "exception happens") \ 113876195Sbrian \ 113976195Sbrian product(bool, PrintCodeCache, false, \ 114076195Sbrian "Print the code cache memory usage when exiting") \ 114176195Sbrian \ 114276195Sbrian develop(bool, PrintCodeCache2, false, \ 114376195Sbrian "Print detailed usage information on the code cache when exiting")\ 114476195Sbrian \ 114576195Sbrian product(bool, PrintCodeCacheOnCompilation, false, \ 114676195Sbrian "Print the code cache memory usage each time a method is " \ 114776195Sbrian "compiled") \ 114876195Sbrian \ 114976195Sbrian diagnostic(bool, PrintStubCode, false, \ 115076195Sbrian "Print generated stub code") \ 115176195Sbrian \ 115276195Sbrian product(bool, StackTraceInThrowable, true, \ 115376195Sbrian "Collect backtrace in throwable when exception happens") \ 115476195Sbrian \ 115576195Sbrian product(bool, OmitStackTraceInFastThrow, true, \ 115676195Sbrian "Omit backtraces for some 'hot' exceptions in optimized code") \ 115776195Sbrian \ 115876195Sbrian product(bool, ProfilerPrintByteCodeStatistics, false, \ 115976195Sbrian "Print bytecode statistics when dumping profiler output") \ 116076195Sbrian \ 116176195Sbrian product(bool, ProfilerRecordPC, false, \ 116276195Sbrian "Collect ticks for each 16 byte interval of compiled code") \ 116376195Sbrian \ 116476195Sbrian product(bool, ProfileVM, false, \ 116576195Sbrian "Profile ticks that fall within VM (either in the VM Thread " \ 116676195Sbrian "or VM code called through stubs)") \ 116776195Sbrian \ 116876195Sbrian product(bool, ProfileIntervals, false, \ 116976195Sbrian "Print profiles for each interval (see ProfileIntervalsTicks)") \ 117076195Sbrian \ 117176195Sbrian notproduct(bool, ProfilerCheckIntervals, false, \ 117276195Sbrian "Collect and print information on spacing of profiler ticks") \ 117376195Sbrian \ 117476195Sbrian product(bool, PrintWarnings, true, \ 117576195Sbrian "Print JVM warnings to output stream") \ 117676195Sbrian \ 1177136200Sphk notproduct(uintx, WarnOnStalledSpinLock, 0, \ 117876195Sbrian "Print warnings for stalled SpinLocks") \ 117976195Sbrian \ 118076195Sbrian product(bool, RegisterFinalizersAtInit, true, \ 118176195Sbrian "Register finalizable objects at end of Object.<init> or " \ 118276195Sbrian "after allocation") \ 118376195Sbrian \ 118476195Sbrian develop(bool, RegisterReferences, true, \ 118576195Sbrian "Tell whether the VM should register soft/weak/final/phantom " \ 118676195Sbrian "references") \ 118776195Sbrian \ 118876195Sbrian develop(bool, IgnoreRewrites, false, \ 118976195Sbrian "Suppress rewrites of bytecodes in the oopmap generator. " \ 119076195Sbrian "This is unsafe!") \ 119176195Sbrian \ 119276195Sbrian develop(bool, PrintCodeCacheExtension, false, \ 119376195Sbrian "Print extension of code cache") \ 119476195Sbrian \ 119576195Sbrian develop(bool, UsePrivilegedStack, true, \ 119676195Sbrian "Enable the security JVM functions") \ 119776195Sbrian \ 119876195Sbrian develop(bool, ProtectionDomainVerification, true, \ 119976195Sbrian "Verify protection domain before resolution in system dictionary")\ 120076195Sbrian \ 120176195Sbrian product(bool, ClassUnloading, true, \ 120276195Sbrian "Do unloading of classes") \ 120376195Sbrian \ 120476195Sbrian product(bool, ClassUnloadingWithConcurrentMark, true, \ 120576195Sbrian "Do unloading of classes with a concurrent marking cycle") \ 120676195Sbrian \ 120776195Sbrian develop(bool, DisableStartThread, false, \ 120876195Sbrian "Disable starting of additional Java threads " \ 120976195Sbrian "(for debugging only)") \ 121076195Sbrian \ 121176195Sbrian develop(bool, MemProfiling, false, \ 121276195Sbrian "Write memory usage profiling to log file") \ 121376195Sbrian \ 121476195Sbrian notproduct(bool, PrintSystemDictionaryAtExit, false, \ 121576195Sbrian "Print the system dictionary at exit") \ 121676195Sbrian \ 121776195Sbrian experimental(intx, PredictedLoadedClassCount, 0, \ 121876195Sbrian "Experimental: Tune loaded class cache starting size") \ 121976195Sbrian \ 1220130095Sphk diagnostic(bool, UnsyncloadClass, false, \ 122176195Sbrian "Unstable: VM calls loadClass unsynchronized. Custom " \ 122276195Sbrian "class loader must call VM synchronized for findClass " \ 122376195Sbrian "and defineClass.") \ 122476195Sbrian \ 122576195Sbrian product(bool, AlwaysLockClassLoader, false, \ 122676195Sbrian "Require the VM to acquire the class loader lock before calling " \ 122776195Sbrian "loadClass() even for class loaders registering " \ 122876195Sbrian "as parallel capable") \ 122976195Sbrian \ 123076195Sbrian product(bool, AllowParallelDefineClass, false, \ 123176195Sbrian "Allow parallel defineClass requests for class loaders " \ 123276195Sbrian "registering as parallel capable") \ 123376195Sbrian \ 123476195Sbrian product(bool, MustCallLoadClassInternal, false, \ 123576195Sbrian "Call loadClassInternal() rather than loadClass()") \ 123676195Sbrian \ 123776195Sbrian product_pd(bool, DontYieldALot, \ 123876195Sbrian "Throw away obvious excess yield calls") \ 123976195Sbrian \ 124076195Sbrian product_pd(bool, ConvertSleepToYield, \ 124176195Sbrian "Convert sleep(0) to thread yield " \ 124276195Sbrian "(may be off for Solaris to improve GUI)") \ 124376195Sbrian \ 124476195Sbrian product(bool, ConvertYieldToSleep, false, \ 124576195Sbrian "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 124676195Sbrian "behavior") \ 124776195Sbrian \ 124876195Sbrian develop(bool, UseDetachedThreads, true, \ 124976195Sbrian "Use detached threads that are recycled upon termination " \ 125076195Sbrian "(for Solaris only)") \ 125176195Sbrian \ 125276195Sbrian product(bool, UseLWPSynchronization, true, \ 125376195Sbrian "Use LWP-based instead of libthread-based synchronization " \ 125476195Sbrian "(SPARC only)") \ 125576195Sbrian \ 125676195Sbrian experimental(ccstr, SyncKnobs, NULL, \ 125778496Sbrian "(Unstable) Various monitor synchronization tunables") \ 125876195Sbrian \ 1259130095Sphk experimental(intx, EmitSync, 0, \ 126076195Sbrian "(Unsafe, Unstable) " \ 126176195Sbrian "Control emission of inline sync fast-path code") \ 126276195Sbrian \ 126376195Sbrian product(intx, MonitorBound, 0, "Bound Monitor population") \ 126476195Sbrian \ 126576195Sbrian product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 126676195Sbrian \ 126776195Sbrian experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1268130077Sphk "Experimental Sync flags") \ 1269130077Sphk \ 1270130077Sphk experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1271130077Sphk \ 1272130077Sphk experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1273130077Sphk \ 127476195Sbrian experimental(intx, hashCode, 5, \ 127576195Sbrian "(Unstable) select hashCode generation algorithm") \ 127676195Sbrian \ 127776195Sbrian experimental(intx, WorkAroundNPTLTimedWaitHang, 1, \ 127876195Sbrian "(Unstable, Linux-specific) " \ 127976195Sbrian "avoid NPTL-FUTEX hang pthread_cond_timedwait") \ 1280130077Sphk \ 128176195Sbrian product(bool, FilterSpuriousWakeups, true, \ 128276195Sbrian "When true prevents OS-level spurious, or premature, wakeups " \ 128376195Sbrian "from Object.wait (Ignored for Windows)") \ 128476195Sbrian \ 128576195Sbrian experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 128676195Sbrian \ 1287130077Sphk experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 128876195Sbrian \ 128976195Sbrian experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 129076195Sbrian \ 129176195Sbrian develop(bool, UsePthreads, false, \ 129276195Sbrian "Use pthread-based instead of libthread-based synchronization " \ 129376195Sbrian "(SPARC only)") \ 129476195Sbrian \ 129576195Sbrian product(bool, ReduceSignalUsage, false, \ 129676195Sbrian "Reduce the use of OS signals in Java and/or the VM") \ 129776195Sbrian \ 129876195Sbrian develop_pd(bool, ShareVtableStubs, \ 129976195Sbrian "Share vtable stubs (smaller code but worse branch prediction") \ 130076195Sbrian \ 130176195Sbrian develop(bool, LoadLineNumberTables, true, \ 130276195Sbrian "Tell whether the class file parser loads line number tables") \ 130376195Sbrian \ 130476195Sbrian develop(bool, LoadLocalVariableTables, true, \ 130576195Sbrian "Tell whether the class file parser loads local variable tables") \ 130676195Sbrian \ 130776195Sbrian develop(bool, LoadLocalVariableTypeTables, true, \ 130876195Sbrian "Tell whether the class file parser loads local variable type" \ 1309136200Sphk "tables") \ 1310136200Sphk \ 131176195Sbrian product(bool, AllowUserSignalHandlers, false, \ 131276195Sbrian "Do not complain if the application installs signal handlers " \ 131376195Sbrian "(Solaris & Linux only)") \ 131476195Sbrian \ 131576195Sbrian product(bool, UseSignalChaining, true, \ 131676195Sbrian "Use signal-chaining to invoke signal handlers installed " \ 131776195Sbrian "by the application (Solaris & Linux only)") \ 131876195Sbrian \ 131976195Sbrian product(bool, UseAltSigs, false, \ 132076195Sbrian "Use alternate signals instead of SIGUSR1 & SIGUSR2 for VM " \ 1321136200Sphk "internal signals (Solaris only)") \ 132276195Sbrian \ 132376195Sbrian product(bool, AllowJNIEnvProxy, false, \ 132476195Sbrian "Allow JNIEnv proxies for jdbx") \ 132576195Sbrian \ 132676195Sbrian product(bool, JNIDetachReleasesMonitors, true, \ 132776195Sbrian "JNI DetachCurrentThread releases monitors owned by thread") \ 132876195Sbrian \ 132976195Sbrian product(bool, RestoreMXCSROnJNICalls, false, \ 133076195Sbrian "Restore MXCSR when returning from JNI calls") \ 1331136200Sphk \ 133276195Sbrian product(bool, CheckJNICalls, false, \ 133376195Sbrian "Verify all arguments to JNI calls") \ 133476195Sbrian \ 133576195Sbrian product(bool, CheckEndorsedAndExtDirs, false, \ 133676195Sbrian "Verify the endorsed and extension directories are not used") \ 133776195Sbrian \ 133876195Sbrian product(bool, UseFastJNIAccessors, true, \ 133976195Sbrian "Use optimized versions of Get<Primitive>Field") \ 134076195Sbrian \ 134176195Sbrian product(intx, MaxJNILocalCapacity, 65536, \ 134276195Sbrian "Maximum allowable local JNI handle capacity to " \ 134376195Sbrian "EnsureLocalCapacity() and PushLocalFrame(), " \ 1344136200Sphk "where <= 0 is unlimited, default: 65536") \ 134576195Sbrian \ 134676195Sbrian product(bool, EagerXrunInit, false, \ 134776195Sbrian "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 134876195Sbrian "but not all -Xrun libraries may support the state of the VM " \ 134976195Sbrian "at this time") \ 135076195Sbrian \ 135176195Sbrian product(bool, PreserveAllAnnotations, false, \ 135276195Sbrian "Preserve RuntimeInvisibleAnnotations as well " \ 135376195Sbrian "as RuntimeVisibleAnnotations") \ 135476195Sbrian \ 135576195Sbrian develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 135676195Sbrian "Number of OutOfMemoryErrors preallocated with backtrace") \ 135776195Sbrian \ 135876195Sbrian product(bool, LazyBootClassLoader, true, \ 135976195Sbrian "Enable/disable lazy opening of boot class path entries") \ 136076195Sbrian \ 136176195Sbrian product(bool, UseXMMForArrayCopy, false, \ 136276195Sbrian "Use SSE2 MOVQ instruction for Arraycopy") \ 136376195Sbrian \ 136476195Sbrian product(intx, FieldsAllocationStyle, 1, \ 136576195Sbrian "0 - type based with oops first, " \ 136676195Sbrian "1 - with oops last, " \ 136776195Sbrian "2 - oops in super and sub classes are together") \ 136876195Sbrian range(0, 2) \ 136976195Sbrian \ 137076195Sbrian product(bool, CompactFields, true, \ 137176195Sbrian "Allocate nonstatic fields in gaps between previous fields") \ 137276195Sbrian \ 137376195Sbrian notproduct(bool, PrintFieldLayout, false, \ 1374136200Sphk "Print field layout for each class") \ 137576195Sbrian \ 137676195Sbrian /* Need to limit the extent of the padding to reasonable size. */\ 137776195Sbrian /* 8K is well beyond the reasonable HW cache line size, even with */\ 137876195Sbrian /* aggressive prefetching, while still leaving the room for segregating */\ 137976195Sbrian /* among the distinct pages. */\ 138076195Sbrian product(intx, ContendedPaddingWidth, 128, \ 138176195Sbrian "How many bytes to pad the fields/classes marked @Contended with")\ 138276195Sbrian range(0, 8192) \ 138376195Sbrian constraint(ContendedPaddingWidthConstraintFunc) \ 138476195Sbrian \ 1385136200Sphk product(bool, EnableContended, true, \ 1386136200Sphk "Enable @Contended annotation support") \ 138776195Sbrian \ 1388136200Sphk product(bool, RestrictContended, true, \ 138976195Sbrian "Restrict @Contended to trusted classes") \ 139076195Sbrian \ 139176195Sbrian product(bool, UseBiasedLocking, true, \ 139276195Sbrian "Enable biased locking in JVM") \ 139376195Sbrian \ 139476195Sbrian product(intx, BiasedLockingStartupDelay, 4000, \ 139576195Sbrian "Number of milliseconds to wait before enabling biased locking") \ 139676195Sbrian \ 139776195Sbrian diagnostic(bool, PrintBiasedLockingStatistics, false, \ 139876195Sbrian "Print statistics of biased locking in JVM") \ 139976195Sbrian \ 140076195Sbrian product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 140176195Sbrian "Threshold of number of revocations per type to try to " \ 140276195Sbrian "rebias all objects in the heap of that type") \ 140376195Sbrian \ 140476195Sbrian product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 140576195Sbrian "Threshold of number of revocations per type to permanently " \ 140676195Sbrian "revoke biases of all objects in the heap of that type") \ 1407118607Sjhb \ 140876195Sbrian product(intx, BiasedLockingDecayTime, 25000, \ 140976195Sbrian "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 141076195Sbrian "type after previous bulk rebias") \ 141176195Sbrian \ 141276195Sbrian /* tracing */ \ 141376195Sbrian \ 141476195Sbrian notproduct(bool, TraceRuntimeCalls, false, \ 141576195Sbrian "Trace run-time calls") \ 141676195Sbrian \ 141776195Sbrian develop(bool, TraceJNICalls, false, \ 141876195Sbrian "Trace JNI calls") \ 141976195Sbrian \ 142076195Sbrian develop(bool, StressRewriter, false, \ 142176195Sbrian "Stress linktime bytecode rewriting") \ 142276195Sbrian \ 142376195Sbrian notproduct(bool, TraceJVMCalls, false, \ 142476195Sbrian "Trace JVM calls") \ 142576195Sbrian \ 142676195Sbrian product(ccstr, TraceJVMTI, NULL, \ 142776195Sbrian "Trace flags for JVMTI functions and events") \ 142876195Sbrian \ 142976195Sbrian /* This option can change an EMCP method into an obsolete method. */ \ 143076195Sbrian /* This can affect tests that except specific methods to be EMCP. */ \ 143176195Sbrian /* This option should be used with caution. */ \ 143276195Sbrian product(bool, StressLdcRewrite, false, \ 143376195Sbrian "Force ldc -> ldc_w rewrite during RedefineClasses") \ 143476195Sbrian \ 143576195Sbrian product(intx, TraceRedefineClasses, 0, \ 143676195Sbrian "Trace level for JVMTI RedefineClasses") \ 143776195Sbrian \ 143876195Sbrian /* change to false by default sometime after Mustang */ \ 143976195Sbrian product(bool, VerifyMergedCPBytecodes, true, \ 144076195Sbrian "Verify bytecodes after RedefineClasses constant pool merging") \ 144176195Sbrian \ 144276195Sbrian develop(bool, TraceJNIHandleAllocation, false, \ 1443136200Sphk "Trace allocation/deallocation of JNI handle blocks") \ 1444136200Sphk \ 144576195Sbrian develop(bool, TraceBytecodes, false, \ 1446136200Sphk "Trace bytecode execution") \ 144776195Sbrian \ 144876195Sbrian develop(bool, TraceClassInitialization, false, \ 144976195Sbrian "Trace class initialization") \ 145076195Sbrian \ 145176195Sbrian product(bool, TraceExceptions, false, \ 145276195Sbrian "Trace exceptions") \ 145376195Sbrian \ 145476195Sbrian develop(bool, TraceICs, false, \ 145576195Sbrian "Trace inline cache changes") \ 145676195Sbrian \ 145776195Sbrian notproduct(bool, TraceInvocationCounterOverflow, false, \ 145876195Sbrian "Trace method invocation counter overflow") \ 1459136200Sphk \ 146076195Sbrian develop(bool, TraceInlineCacheClearing, false, \ 1461136200Sphk "Trace clearing of inline caches in nmethods") \ 1462136200Sphk \ 1463136200Sphk develop(bool, TraceDependencies, false, \ 146476195Sbrian "Trace dependencies") \ 146576195Sbrian \ 1466136200Sphk develop(bool, VerifyDependencies, trueInDebug, \ 146776195Sbrian "Exercise and verify the compilation dependency mechanism") \ 146876195Sbrian \ 146976195Sbrian develop(bool, TraceNewOopMapGeneration, false, \ 147076195Sbrian "Trace OopMapGeneration") \ 147176195Sbrian \ 147276195Sbrian develop(bool, TraceNewOopMapGenerationDetailed, false, \ 147376195Sbrian "Trace OopMapGeneration: print detailed cell states") \ 147476195Sbrian \ 147576195Sbrian develop(bool, TimeOopMap, false, \ 147676195Sbrian "Time calls to GenerateOopMap::compute_map() in sum") \ 1477136200Sphk \ 147876195Sbrian develop(bool, TimeOopMap2, false, \ 147976195Sbrian "Time calls to GenerateOopMap::compute_map() individually") \ 148076195Sbrian \ 148176195Sbrian develop(bool, TraceMonitorMismatch, false, \ 1482136200Sphk "Trace monitor matching failures during OopMapGeneration") \ 148376195Sbrian \ 1484136200Sphk develop(bool, TraceOopMapRewrites, false, \ 148576195Sbrian "Trace rewriting of method oops during oop map generation") \ 148676195Sbrian \ 148776195Sbrian develop(bool, TraceSafepoint, false, \ 148876195Sbrian "Trace safepoint operations") \ 148976195Sbrian \ 1490136200Sphk develop(bool, TraceICBuffer, false, \ 1491136200Sphk "Trace usage of IC buffer") \ 1492136200Sphk \ 149376195Sbrian develop(bool, TraceCompiledIC, false, \ 149476195Sbrian "Trace changes of compiled IC") \ 149576195Sbrian \ 149676195Sbrian notproduct(bool, TraceZapDeadLocals, false, \ 149776195Sbrian "Trace zapping dead locals") \ 149876195Sbrian \ 149976195Sbrian develop(bool, TraceStartupTime, false, \ 150076195Sbrian "Trace setup time") \ 150176195Sbrian \ 150276195Sbrian develop(bool, TraceProtectionDomainVerification, false, \ 150377004Sbrian "Trace protection domain verification") \ 150476195Sbrian \ 150576195Sbrian develop(bool, TraceClearedExceptions, false, \ 150676195Sbrian "Print when an exception is forcibly cleared") \ 150776195Sbrian \ 150876195Sbrian product(bool, TraceClassResolution, false, \ 150976195Sbrian "Trace all constant pool resolutions (for debugging)") \ 151076195Sbrian \ 151176195Sbrian product(bool, TraceBiasedLocking, false, \ 151276195Sbrian "Trace biased locking in JVM") \ 151376195Sbrian \ 151476195Sbrian product(bool, TraceMonitorInflation, false, \ 151576195Sbrian "Trace monitor inflation in JVM") \ 151676195Sbrian \ 151776195Sbrian /* gc */ \ 151876195Sbrian \ 151976195Sbrian product(bool, UseSerialGC, false, \ 152076195Sbrian "Use the Serial garbage collector") \ 152176195Sbrian \ 152276195Sbrian product(bool, UseG1GC, false, \ 152376195Sbrian "Use the Garbage-First garbage collector") \ 152476195Sbrian \ 152576195Sbrian product(bool, UseParallelGC, false, \ 152676195Sbrian "Use the Parallel Scavenge garbage collector") \ 152776195Sbrian \ 1528120461Sphk product(bool, UseParallelOldGC, false, \ 152976195Sbrian "Use the Parallel Old garbage collector") \ 153076195Sbrian \ 153176195Sbrian product(uintx, HeapMaximumCompactionInterval, 20, \ 153276195Sbrian "How often should we maximally compact the heap (not allowing " \ 153376195Sbrian "any dead space)") \ 153476195Sbrian \ 153576195Sbrian product(uintx, HeapFirstMaximumCompactionCount, 3, \ 153676195Sbrian "The collection count for the first maximum compaction") \ 153776195Sbrian \ 153876195Sbrian product(bool, UseMaximumCompactionOnSystemGC, true, \ 153976195Sbrian "Use maximum compaction in the Parallel Old garbage collector " \ 154076195Sbrian "for a system GC") \ 154176195Sbrian \ 154276195Sbrian product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 154376195Sbrian "The mean used by the parallel compact dead wood " \ 154476195Sbrian "limiter (a number between 0-100)") \ 154576195Sbrian range(0, 100) \ 154676195Sbrian \ 154776195Sbrian product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 154876195Sbrian "The standard deviation used by the parallel compact dead wood " \ 154994320Sbrian "limiter (a number between 0-100)") \ 155094320Sbrian range(0, 100) \ 1551 \ 1552 product(uint, ParallelGCThreads, 0, \ 1553 "Number of parallel threads parallel gc will use") \ 1554 \ 1555 product(bool, UseDynamicNumberOfGCThreads, false, \ 1556 "Dynamically choose the number of parallel threads " \ 1557 "parallel gc will use") \ 1558 \ 1559 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1560 "Force dynamic selection of the number of " \ 1561 "parallel threads parallel gc will use to aid debugging") \ 1562 \ 1563 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1564 "Size of heap (bytes) per GC thread used in calculating the " \ 1565 "number of GC threads") \ 1566 range((uintx)os::vm_page_size(), max_uintx) \ 1567 \ 1568 product(bool, TraceDynamicGCThreads, false, \ 1569 "Trace the dynamic GC thread usage") \ 1570 \ 1571 develop(bool, ParallelOldGCSplitALot, false, \ 1572 "Provoke splitting (copying data from a young gen space to " \ 1573 "multiple destination spaces)") \ 1574 \ 1575 develop(uintx, ParallelOldGCSplitInterval, 3, \ 1576 "How often to provoke splitting a young gen space") \ 1577 range(0, max_uintx) \ 1578 \ 1579 product(uint, ConcGCThreads, 0, \ 1580 "Number of threads concurrent gc will use") \ 1581 \ 1582 product(size_t, YoungPLABSize, 4096, \ 1583 "Size of young gen promotion LAB's (in HeapWords)") \ 1584 \ 1585 product(size_t, OldPLABSize, 1024, \ 1586 "Size of old gen promotion LAB's (in HeapWords), or Number \ 1587 of blocks to attempt to claim when refilling CMS LAB's") \ 1588 \ 1589 product(uintx, GCTaskTimeStampEntries, 200, \ 1590 "Number of time stamp entries per gc worker thread") \ 1591 range(1, max_uintx) \ 1592 \ 1593 product(bool, AlwaysTenure, false, \ 1594 "Always tenure objects in eden (ParallelGC only)") \ 1595 \ 1596 product(bool, NeverTenure, false, \ 1597 "Never tenure objects in eden, may tenure on overflow " \ 1598 "(ParallelGC only)") \ 1599 \ 1600 product(bool, ScavengeBeforeFullGC, true, \ 1601 "Scavenge youngest generation before each full GC.") \ 1602 \ 1603 develop(bool, ScavengeWithObjectsInToSpace, false, \ 1604 "Allow scavenges to occur when to-space contains objects") \ 1605 \ 1606 product(bool, UseConcMarkSweepGC, false, \ 1607 "Use Concurrent Mark-Sweep GC in the old generation") \ 1608 \ 1609 product(bool, ExplicitGCInvokesConcurrent, false, \ 1610 "A System.gc() request invokes a concurrent collection; " \ 1611 "(effective only when using concurrent collectors)") \ 1612 \ 1613 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1614 "A System.gc() request invokes a concurrent collection and " \ 1615 "also unloads classes during such a concurrent gc cycle " \ 1616 "(effective only when UseConcMarkSweepGC)") \ 1617 \ 1618 product(bool, GCLockerInvokesConcurrent, false, \ 1619 "The exit of a JNI critical section necessitating a scavenge, " \ 1620 "also kicks off a background concurrent collection") \ 1621 \ 1622 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1623 "How much the GC can expand the eden by while the GC locker " \ 1624 "is active (as a percentage)") \ 1625 range(0, 100) \ 1626 \ 1627 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1628 "Number of times to retry allocations when " \ 1629 "blocked by the GC locker") \ 1630 \ 1631 develop(bool, UseCMSAdaptiveFreeLists, true, \ 1632 "Use adaptive free lists in the CMS generation") \ 1633 \ 1634 develop(bool, UseAsyncConcMarkSweepGC, true, \ 1635 "Use Asynchronous Concurrent Mark-Sweep GC in the old generation")\ 1636 \ 1637 product(bool, UseCMSBestFit, true, \ 1638 "Use CMS best fit allocation strategy") \ 1639 \ 1640 product(bool, UseParNewGC, false, \ 1641 "Use parallel threads in the new generation") \ 1642 \ 1643 product(bool, PrintTaskqueue, false, \ 1644 "Print taskqueue statistics for parallel collectors") \ 1645 \ 1646 product(bool, PrintTerminationStats, false, \ 1647 "Print termination statistics for parallel collectors") \ 1648 \ 1649 product(uintx, ParallelGCBufferWastePct, 10, \ 1650 "Wasted fraction of parallel allocation buffer") \ 1651 range(0, 100) \ 1652 \ 1653 product(uintx, TargetPLABWastePct, 10, \ 1654 "Target wasted space in last buffer as percent of overall " \ 1655 "allocation") \ 1656 range(1, 100) \ 1657 \ 1658 product(uintx, PLABWeight, 75, \ 1659 "Percentage (0-100) used to weight the current sample when " \ 1660 "computing exponentially decaying average for ResizePLAB") \ 1661 range(0, 100) \ 1662 \ 1663 product(bool, ResizePLAB, true, \ 1664 "Dynamically resize (survivor space) promotion LAB's") \ 1665 \ 1666 product(bool, PrintPLAB, false, \ 1667 "Print (survivor space) promotion LAB's sizing decisions") \ 1668 \ 1669 product(intx, ParGCArrayScanChunk, 50, \ 1670 "Scan a subset of object array and push remainder, if array is " \ 1671 "bigger than this") \ 1672 range(1, max_intx) \ 1673 \ 1674 product(bool, ParGCUseLocalOverflow, false, \ 1675 "Instead of a global overflow list, use local overflow stacks") \ 1676 \ 1677 product(bool, ParGCTrimOverflow, true, \ 1678 "Eagerly trim the local overflow lists " \ 1679 "(when ParGCUseLocalOverflow)") \ 1680 \ 1681 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1682 "Simulate work queue overflow in ParNew") \ 1683 \ 1684 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1685 "An `interval' counter that determines how frequently " \ 1686 "we simulate overflow; a smaller number increases frequency") \ 1687 \ 1688 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1689 "The desired number of objects to claim from the overflow list") \ 1690 \ 1691 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1692 "The number of strides per worker thread that we divide up the " \ 1693 "card table scanning work into") \ 1694 range(1, max_uintx) \ 1695 \ 1696 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1697 "The number of cards in each chunk of the parallel chunks used " \ 1698 "during card table scanning") \ 1699 range(1, max_intx) \ 1700 \ 1701 product(uintx, OldPLABWeight, 50, \ 1702 "Percentage (0-100) used to weight the current sample when " \ 1703 "computing exponentially decaying average for resizing " \ 1704 "OldPLABSize") \ 1705 range(0, 100) \ 1706 \ 1707 product(bool, ResizeOldPLAB, true, \ 1708 "Dynamically resize (old gen) promotion LAB's") \ 1709 \ 1710 product(bool, PrintOldPLAB, false, \ 1711 "Print (old gen) promotion LAB's sizing decisions") \ 1712 \ 1713 product(size_t, CMSOldPLABMax, 1024, \ 1714 "Maximum size of CMS gen promotion LAB caches per worker " \ 1715 "per block size") \ 1716 range(1, max_uintx) \ 1717 \ 1718 product(size_t, CMSOldPLABMin, 16, \ 1719 "Minimum size of CMS gen promotion LAB caches per worker " \ 1720 "per block size") \ 1721 range(1, max_uintx) \ 1722 constraint(CMSOldPLABMinConstraintFunc) \ 1723 \ 1724 product(uintx, CMSOldPLABNumRefills, 4, \ 1725 "Nominal number of refills of CMS gen promotion LAB cache " \ 1726 "per worker per block size") \ 1727 range(1, max_uintx) \ 1728 \ 1729 product(bool, CMSOldPLABResizeQuicker, false, \ 1730 "React on-the-fly during a scavenge to a sudden " \ 1731 "change in block demand rate") \ 1732 \ 1733 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1734 "The tolerance of the phase-change detector for on-the-fly " \ 1735 "PLAB resizing during a scavenge") \ 1736 range(1, max_uintx) \ 1737 \ 1738 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1739 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1740 "during a scavenge") \ 1741 \ 1742 product(bool, AlwaysPreTouch, false, \ 1743 "Force all freshly committed pages to be pre-touched") \ 1744 \ 1745 product_pd(size_t, CMSYoungGenPerWorker, \ 1746 "The maximum size of young gen chosen by default per GC worker " \ 1747 "thread available") \ 1748 range(1, max_uintx) \ 1749 \ 1750 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1751 "Percentage (0-100) used to add conservatism when computing the " \ 1752 "duty cycle") \ 1753 range(0, 100) \ 1754 \ 1755 product(uintx, CMSExpAvgFactor, 50, \ 1756 "Percentage (0-100) used to weight the current sample when " \ 1757 "computing exponential averages for CMS statistics") \ 1758 range(0, 100) \ 1759 \ 1760 product(uintx, CMS_FLSWeight, 75, \ 1761 "Percentage (0-100) used to weight the current sample when " \ 1762 "computing exponentially decaying averages for CMS FLS " \ 1763 "statistics") \ 1764 range(0, 100) \ 1765 \ 1766 product(uintx, CMS_FLSPadding, 1, \ 1767 "The multiple of deviation from mean to use for buffering " \ 1768 "against volatility in free list demand") \ 1769 \ 1770 product(uintx, FLSCoalescePolicy, 2, \ 1771 "CMS: aggressiveness level for coalescing, increasing " \ 1772 "from 0 to 4") \ 1773 range(0, 4) \ 1774 \ 1775 product(bool, FLSAlwaysCoalesceLarge, false, \ 1776 "CMS: larger free blocks are always available for coalescing") \ 1777 \ 1778 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1779 "CMS: the smaller the percentage the greater the coalescing " \ 1780 "force") \ 1781 \ 1782 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1783 "CMS: the factor by which to inflate estimated demand of small " \ 1784 "block sizes to prevent coalescing with an adjoining block") \ 1785 \ 1786 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1787 "CMS: the factor by which to inflate estimated demand of large " \ 1788 "block sizes to prevent coalescing with an adjoining block") \ 1789 \ 1790 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1791 "CMS: the factor by which to inflate estimated demand of small " \ 1792 "block sizes to prevent splitting to supply demand for smaller " \ 1793 "blocks") \ 1794 \ 1795 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1796 "CMS: the factor by which to inflate estimated demand of large " \ 1797 "block sizes to prevent splitting to supply demand for smaller " \ 1798 "blocks") \ 1799 \ 1800 product(bool, CMSExtrapolateSweep, false, \ 1801 "CMS: cushion for block demand during sweep") \ 1802 \ 1803 product(uintx, CMS_SweepWeight, 75, \ 1804 "Percentage (0-100) used to weight the current sample when " \ 1805 "computing exponentially decaying average for inter-sweep " \ 1806 "duration") \ 1807 range(0, 100) \ 1808 \ 1809 product(uintx, CMS_SweepPadding, 1, \ 1810 "The multiple of deviation from mean to use for buffering " \ 1811 "against volatility in inter-sweep duration") \ 1812 \ 1813 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1814 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1815 "duration exceeds this threshold in milliseconds") \ 1816 \ 1817 product(bool, CMSClassUnloadingEnabled, true, \ 1818 "Whether class unloading enabled when using CMS GC") \ 1819 \ 1820 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1821 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1822 "count for which classes may not be unloaded") \ 1823 \ 1824 develop(intx, CMSDictionaryChoice, 0, \ 1825 "Use BinaryTreeDictionary as default in the CMS generation") \ 1826 \ 1827 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1828 "Replenish an indexed free list with this number of chunks") \ 1829 \ 1830 product(bool, CMSReplenishIntermediate, true, \ 1831 "Replenish all intermediate free-list caches") \ 1832 \ 1833 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1834 "When satisfying batched demand, split blocks from the " \ 1835 "IndexedFreeList whose size is a multiple of requested size") \ 1836 \ 1837 product(bool, CMSLoopWarn, false, \ 1838 "Warn in case of excessive CMS looping") \ 1839 \ 1840 develop(bool, CMSOverflowEarlyRestoration, false, \ 1841 "Restore preserved marks early") \ 1842 \ 1843 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1844 "Size of marking stack") \ 1845 \ 1846 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1847 "Maximum size of marking stack") \ 1848 range(1, (max_jint - 1)) \ 1849 \ 1850 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1851 "Simulate frequent marking stack / work queue overflow") \ 1852 \ 1853 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1854 "An \"interval\" counter that determines how frequently " \ 1855 "to simulate overflow; a smaller number increases frequency") \ 1856 \ 1857 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1858 "Maximum number of abortable preclean iterations, if > 0") \ 1859 \ 1860 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1861 "Maximum time in abortable preclean (in milliseconds)") \ 1862 \ 1863 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1864 "Nominal minimum work per abortable preclean iteration") \ 1865 \ 1866 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1867 "Time that we sleep between iterations when not given " \ 1868 "enough work per iteration") \ 1869 \ 1870 product(size_t, CMSRescanMultiple, 32, \ 1871 "Size (in cards) of CMS parallel rescan task") \ 1872 range(1, max_uintx) \ 1873 \ 1874 product(size_t, CMSConcMarkMultiple, 32, \ 1875 "Size (in cards) of CMS concurrent MT marking task") \ 1876 range(1, max_uintx) \ 1877 \ 1878 product(bool, CMSAbortSemantics, false, \ 1879 "Whether abort-on-overflow semantics is implemented") \ 1880 \ 1881 product(bool, CMSParallelInitialMarkEnabled, true, \ 1882 "Use the parallel initial mark.") \ 1883 \ 1884 product(bool, CMSParallelRemarkEnabled, true, \ 1885 "Whether parallel remark enabled (only if ParNewGC)") \ 1886 \ 1887 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1888 "Whether parallel remark of survivor space " \ 1889 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1890 \ 1891 product(bool, CMSPLABRecordAlways, true, \ 1892 "Always record survivor space PLAB boundaries (effective only " \ 1893 "if CMSParallelSurvivorRemarkEnabled)") \ 1894 \ 1895 product(bool, CMSEdenChunksRecordAlways, true, \ 1896 "Always record eden chunks used for the parallel initial mark " \ 1897 "or remark of eden") \ 1898 \ 1899 product(bool, CMSPrintEdenSurvivorChunks, false, \ 1900 "Print the eden and the survivor chunks used for the parallel " \ 1901 "initial mark or remark of the eden/survivor spaces") \ 1902 \ 1903 product(bool, CMSConcurrentMTEnabled, true, \ 1904 "Whether multi-threaded concurrent work enabled " \ 1905 "(effective only if ParNewGC)") \ 1906 \ 1907 product(bool, CMSPrecleaningEnabled, true, \ 1908 "Whether concurrent precleaning enabled") \ 1909 \ 1910 product(uintx, CMSPrecleanIter, 3, \ 1911 "Maximum number of precleaning iteration passes") \ 1912 range(0, 9) \ 1913 \ 1914 product(uintx, CMSPrecleanDenominator, 3, \ 1915 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1916 "ratio") \ 1917 range(1, max_uintx) \ 1918 constraint(CMSPrecleanDenominatorConstraintFunc) \ 1919 \ 1920 product(uintx, CMSPrecleanNumerator, 2, \ 1921 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1922 "ratio") \ 1923 range(0, max_uintx-1) \ 1924 constraint(CMSPrecleanNumeratorConstraintFunc) \ 1925 \ 1926 product(bool, CMSPrecleanRefLists1, true, \ 1927 "Preclean ref lists during (initial) preclean phase") \ 1928 \ 1929 product(bool, CMSPrecleanRefLists2, false, \ 1930 "Preclean ref lists during abortable preclean phase") \ 1931 \ 1932 product(bool, CMSPrecleanSurvivors1, false, \ 1933 "Preclean survivors during (initial) preclean phase") \ 1934 \ 1935 product(bool, CMSPrecleanSurvivors2, true, \ 1936 "Preclean survivors during abortable preclean phase") \ 1937 \ 1938 product(uintx, CMSPrecleanThreshold, 1000, \ 1939 "Do not iterate again if number of dirty cards is less than this")\ 1940 range(100, max_uintx) \ 1941 \ 1942 product(bool, CMSCleanOnEnter, true, \ 1943 "Clean-on-enter optimization for reducing number of dirty cards") \ 1944 \ 1945 product(uintx, CMSRemarkVerifyVariant, 1, \ 1946 "Choose variant (1,2) of verification following remark") \ 1947 range(1, 2) \ 1948 \ 1949 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1950 "If Eden size is below this, do not try to schedule remark") \ 1951 \ 1952 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1953 "The Eden occupancy percentage (0-100) at which " \ 1954 "to try and schedule remark pause") \ 1955 range(0, 100) \ 1956 \ 1957 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1958 "Start sampling eden top at least before young gen " \ 1959 "occupancy reaches 1/<ratio> of the size at which " \ 1960 "we plan to schedule remark") \ 1961 range(1, max_uintx) \ 1962 \ 1963 product(uintx, CMSSamplingGrain, 16*K, \ 1964 "The minimum distance between eden samples for CMS (see above)") \ 1965 range(1, max_uintx) \ 1966 \ 1967 product(bool, CMSScavengeBeforeRemark, false, \ 1968 "Attempt scavenge before the CMS remark step") \ 1969 \ 1970 develop(bool, CMSTraceSweeper, false, \ 1971 "Trace some actions of the CMS sweeper") \ 1972 \ 1973 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1974 "Don't drain below this size per parallel worker/thief") \ 1975 \ 1976 manageable(intx, CMSWaitDuration, 2000, \ 1977 "Time in milliseconds that CMS thread waits for young GC") \ 1978 \ 1979 develop(uintx, CMSCheckInterval, 1000, \ 1980 "Interval in milliseconds that CMS thread checks if it " \ 1981 "should start a collection cycle") \ 1982 \ 1983 product(bool, CMSYield, true, \ 1984 "Yield between steps of CMS") \ 1985 \ 1986 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1987 "Bitmap operations should process at most this many bits " \ 1988 "between yields") \ 1989 range(1, max_uintx) \ 1990 \ 1991 product(bool, CMSDumpAtPromotionFailure, false, \ 1992 "Dump useful information about the state of the CMS old " \ 1993 "generation upon a promotion failure") \ 1994 \ 1995 product(bool, CMSPrintChunksInDump, false, \ 1996 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 1997 "more detailed information about the free chunks") \ 1998 \ 1999 product(bool, CMSPrintObjectsInDump, false, \ 2000 "In a dump enabled by CMSDumpAtPromotionFailure, include " \ 2001 "more detailed information about the allocated objects") \ 2002 \ 2003 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 2004 "Verify that all references across the FLS boundary " \ 2005 "are to valid objects") \ 2006 \ 2007 diagnostic(bool, FLSVerifyLists, false, \ 2008 "Do lots of (expensive) FreeListSpace verification") \ 2009 \ 2010 diagnostic(bool, FLSVerifyIndexTable, false, \ 2011 "Do lots of (expensive) FLS index table verification") \ 2012 \ 2013 develop(bool, FLSVerifyDictionary, false, \ 2014 "Do lots of (expensive) FLS dictionary verification") \ 2015 \ 2016 develop(bool, VerifyBlockOffsetArray, false, \ 2017 "Do (expensive) block offset array verification") \ 2018 \ 2019 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 2020 "Maintain _unallocated_block in BlockOffsetArray " \ 2021 "(currently applicable only to CMS collector)") \ 2022 \ 2023 develop(bool, TraceCMSState, false, \ 2024 "Trace the state of the CMS collection") \ 2025 \ 2026 product(intx, RefDiscoveryPolicy, 0, \ 2027 "Select type of reference discovery policy: " \ 2028 "reference-based(0) or referent-based(1)") \ 2029 range(ReferenceProcessor::DiscoveryPolicyMin, \ 2030 ReferenceProcessor::DiscoveryPolicyMax) \ 2031 \ 2032 product(bool, ParallelRefProcEnabled, false, \ 2033 "Enable parallel reference processing whenever possible") \ 2034 \ 2035 product(bool, ParallelRefProcBalancingEnabled, true, \ 2036 "Enable balancing of reference processing queues") \ 2037 \ 2038 product(uintx, CMSTriggerRatio, 80, \ 2039 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 2040 "allocated before a CMS collection cycle commences") \ 2041 range(0, 100) \ 2042 \ 2043 product(uintx, CMSBootstrapOccupancy, 50, \ 2044 "Percentage CMS generation occupancy at which to " \ 2045 "initiate CMS collection for bootstrapping collection stats") \ 2046 range(0, 100) \ 2047 \ 2048 product(intx, CMSInitiatingOccupancyFraction, -1, \ 2049 "Percentage CMS generation occupancy to start a CMS collection " \ 2050 "cycle. A negative value means that CMSTriggerRatio is used") \ 2051 range(min_intx, 100) \ 2052 \ 2053 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 2054 "Percentage of the (entire) heap occupancy to start a " \ 2055 "concurrent GC cycle. It is used by GCs that trigger a " \ 2056 "concurrent GC cycle based on the occupancy of the entire heap, " \ 2057 "not just one of the generations (e.g., G1). A value of 0 " \ 2058 "denotes 'do constant GC cycles'.") \ 2059 range(0, 100) \ 2060 \ 2061 manageable(intx, CMSTriggerInterval, -1, \ 2062 "Commence a CMS collection cycle (at least) every so many " \ 2063 "milliseconds (0 permanently, -1 disabled)") \ 2064 range(-1, max_intx) \ 2065 \ 2066 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2067 "Only use occupancy as a criterion for starting a CMS collection")\ 2068 \ 2069 product(uintx, CMSIsTooFullPercentage, 98, \ 2070 "An absolute ceiling above which CMS will always consider the " \ 2071 "unloading of classes when class unloading is enabled") \ 2072 range(0, 100) \ 2073 \ 2074 develop(bool, CMSTestInFreeList, false, \ 2075 "Check if the coalesced range is already in the " \ 2076 "free lists as claimed") \ 2077 \ 2078 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2079 "Check that all the garbage collected was returned to the " \ 2080 "free lists") \ 2081 \ 2082 notproduct(bool, ScavengeALot, false, \ 2083 "Force scavenge at every Nth exit from the runtime system " \ 2084 "(N=ScavengeALotInterval)") \ 2085 \ 2086 develop(bool, FullGCALot, false, \ 2087 "Force full gc at every Nth exit from the runtime system " \ 2088 "(N=FullGCALotInterval)") \ 2089 \ 2090 notproduct(bool, GCALotAtAllSafepoints, false, \ 2091 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2092 \ 2093 product(bool, PrintPromotionFailure, false, \ 2094 "Print additional diagnostic information following " \ 2095 "promotion failure") \ 2096 \ 2097 notproduct(bool, PromotionFailureALot, false, \ 2098 "Use promotion failure handling on every youngest generation " \ 2099 "collection") \ 2100 \ 2101 develop(uintx, PromotionFailureALotCount, 1000, \ 2102 "Number of promotion failures occurring at PLAB " \ 2103 "refill attempts (ParNew) or promotion attempts " \ 2104 "(other young collectors)") \ 2105 \ 2106 develop(uintx, PromotionFailureALotInterval, 5, \ 2107 "Total collections between promotion failures a lot") \ 2108 \ 2109 experimental(uintx, WorkStealingSleepMillis, 1, \ 2110 "Sleep time when sleep is used for yields") \ 2111 \ 2112 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2113 "Number of yields before a sleep is done during work stealing") \ 2114 \ 2115 experimental(uintx, WorkStealingHardSpins, 4096, \ 2116 "Number of iterations in a spin loop between checks on " \ 2117 "time out of hard spin") \ 2118 \ 2119 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2120 "Ratio of hard spins to calls to yield") \ 2121 \ 2122 develop(uintx, ObjArrayMarkingStride, 512, \ 2123 "Number of object array elements to push onto the marking stack " \ 2124 "before pushing a continuation entry") \ 2125 \ 2126 develop(bool, MetadataAllocationFailALot, false, \ 2127 "Fail metadata allocations at intervals controlled by " \ 2128 "MetadataAllocationFailALotInterval") \ 2129 \ 2130 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2131 "Metadata allocation failure a lot interval") \ 2132 \ 2133 develop(bool, TraceMetadataChunkAllocation, false, \ 2134 "Trace chunk metadata allocations") \ 2135 \ 2136 product(bool, TraceMetadataHumongousAllocation, false, \ 2137 "Trace humongous metadata allocations") \ 2138 \ 2139 develop(bool, TraceMetavirtualspaceAllocation, false, \ 2140 "Trace virtual space metadata allocations") \ 2141 \ 2142 notproduct(bool, ExecuteInternalVMTests, false, \ 2143 "Enable execution of internal VM tests") \ 2144 \ 2145 notproduct(bool, VerboseInternalVMTests, false, \ 2146 "Turn on logging for internal VM tests.") \ 2147 \ 2148 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2149 \ 2150 product_pd(bool, ResizeTLAB, \ 2151 "Dynamically resize TLAB size for threads") \ 2152 \ 2153 product(bool, ZeroTLAB, false, \ 2154 "Zero out the newly created TLAB") \ 2155 \ 2156 product(bool, FastTLABRefill, true, \ 2157 "Use fast TLAB refill code") \ 2158 \ 2159 product(bool, PrintTLAB, false, \ 2160 "Print various TLAB related information") \ 2161 \ 2162 product(bool, TLABStats, true, \ 2163 "Provide more detailed and expensive TLAB statistics " \ 2164 "(with PrintTLAB)") \ 2165 \ 2166 product_pd(bool, NeverActAsServerClassMachine, \ 2167 "Never act like a server-class machine") \ 2168 \ 2169 product(bool, AlwaysActAsServerClassMachine, false, \ 2170 "Always act like a server-class machine") \ 2171 \ 2172 product_pd(uint64_t, MaxRAM, \ 2173 "Real memory size (in bytes) used to set maximum heap size") \ 2174 \ 2175 product(size_t, ErgoHeapSizeLimit, 0, \ 2176 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2177 "MaxRAM / MaxRAMFraction") \ 2178 \ 2179 product(uintx, MaxRAMFraction, 4, \ 2180 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2181 "size") \ 2182 range(1, max_uintx) \ 2183 \ 2184 product(uintx, DefaultMaxRAMFraction, 4, \ 2185 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2186 "size; deprecated: to be renamed to MaxRAMFraction") \ 2187 range(1, max_uintx) \ 2188 \ 2189 product(uintx, MinRAMFraction, 2, \ 2190 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2191 "size on systems with small physical memory size") \ 2192 range(1, max_uintx) \ 2193 \ 2194 product(uintx, InitialRAMFraction, 64, \ 2195 "Fraction (1/n) of real memory used for initial heap size") \ 2196 range(1, max_uintx) \ 2197 \ 2198 develop(uintx, MaxVirtMemFraction, 2, \ 2199 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2200 "determining maximum heap size") \ 2201 \ 2202 product(bool, UseAutoGCSelectPolicy, false, \ 2203 "Use automatic collection selection policy") \ 2204 \ 2205 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2206 "Automatic GC selection pause threshold in milliseconds") \ 2207 \ 2208 product(bool, UseAdaptiveSizePolicy, true, \ 2209 "Use adaptive generation sizing policies") \ 2210 \ 2211 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2212 "Use adaptive survivor sizing policies") \ 2213 \ 2214 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2215 "Use adaptive young-old sizing policies at minor collections") \ 2216 \ 2217 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2218 "Use adaptive young-old sizing policies at major collections") \ 2219 \ 2220 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2221 "Include statistics from System.gc() for adaptive size policy") \ 2222 \ 2223 product(bool, UseAdaptiveGCBoundary, false, \ 2224 "Allow young-old boundary to move") \ 2225 \ 2226 develop(bool, TraceAdaptiveGCBoundary, false, \ 2227 "Trace young-old boundary moves") \ 2228 \ 2229 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2230 "Resize the virtual spaces of the young or old generations") \ 2231 \ 2232 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2233 "Policy for changing generation size for throughput goals") \ 2234 \ 2235 develop(bool, PSAdjustTenuredGenForMinorPause, false, \ 2236 "Adjust tenured generation to achieve a minor pause goal") \ 2237 \ 2238 develop(bool, PSAdjustYoungGenForMajorPause, false, \ 2239 "Adjust young generation to achieve a major pause goal") \ 2240 \ 2241 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2242 "Number of steps where heuristics is used before data is used") \ 2243 \ 2244 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2245 "Number of collections before the adaptive sizing is started") \ 2246 \ 2247 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2248 "Collection interval for printing information; zero means never") \ 2249 \ 2250 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2251 "Use adaptive minimum footprint as a goal") \ 2252 \ 2253 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2254 "Weight given to exponential resizing, between 0 and 100") \ 2255 range(0, 100) \ 2256 \ 2257 product(uintx, AdaptiveTimeWeight, 25, \ 2258 "Weight given to time in adaptive policy, between 0 and 100") \ 2259 range(0, 100) \ 2260 \ 2261 product(uintx, PausePadding, 1, \ 2262 "How much buffer to keep for pause time") \ 2263 \ 2264 product(uintx, PromotedPadding, 3, \ 2265 "How much buffer to keep for promotion failure") \ 2266 \ 2267 product(uintx, SurvivorPadding, 3, \ 2268 "How much buffer to keep for survivor overflow") \ 2269 \ 2270 product(uintx, ThresholdTolerance, 10, \ 2271 "Allowed collection cost difference between generations") \ 2272 range(0, 100) \ 2273 \ 2274 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2275 "If collection costs are within margin, reduce both by full " \ 2276 "delta") \ 2277 \ 2278 product(uintx, YoungGenerationSizeIncrement, 20, \ 2279 "Adaptive size percentage change in young generation") \ 2280 range(0, 100) \ 2281 \ 2282 product(uintx, YoungGenerationSizeSupplement, 80, \ 2283 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2284 range(0, 100) \ 2285 \ 2286 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2287 "Decay factor to YoungedGenerationSizeSupplement") \ 2288 range(1, max_uintx) \ 2289 \ 2290 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2291 "Adaptive size percentage change in tenured generation") \ 2292 range(0, 100) \ 2293 \ 2294 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2295 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2296 range(0, 100) \ 2297 \ 2298 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2299 "Decay factor to TenuredGenerationSizeIncrement") \ 2300 range(1, max_uintx) \ 2301 \ 2302 product(uintx, MaxGCPauseMillis, max_uintx, \ 2303 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2304 "or (G1 Only) the maximum GC time per MMU time slice") \ 2305 \ 2306 product(uintx, GCPauseIntervalMillis, 0, \ 2307 "Time slice for MMU specification") \ 2308 \ 2309 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2310 "Adaptive size policy maximum GC minor pause time goal " \ 2311 "in millisecond") \ 2312 \ 2313 product(uintx, GCTimeRatio, 99, \ 2314 "Adaptive size policy application time to GC time ratio") \ 2315 \ 2316 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2317 "Adaptive size scale down factor for shrinking") \ 2318 range(1, max_uintx) \ 2319 \ 2320 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2321 "Adaptive size decays the major cost for long major intervals") \ 2322 \ 2323 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2324 "Time scale over which major costs decay") \ 2325 \ 2326 product(uintx, MinSurvivorRatio, 3, \ 2327 "Minimum ratio of young generation/survivor space size") \ 2328 \ 2329 product(uintx, InitialSurvivorRatio, 8, \ 2330 "Initial ratio of young generation/survivor space size") \ 2331 \ 2332 product(size_t, BaseFootPrintEstimate, 256*M, \ 2333 "Estimate of footprint other than Java Heap") \ 2334 \ 2335 product(bool, UseGCOverheadLimit, true, \ 2336 "Use policy to limit of proportion of time spent in GC " \ 2337 "before an OutOfMemory error is thrown") \ 2338 \ 2339 product(uintx, GCTimeLimit, 98, \ 2340 "Limit of the proportion of time spent in GC before " \ 2341 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2342 range(0, 100) \ 2343 \ 2344 product(uintx, GCHeapFreeLimit, 2, \ 2345 "Minimum percentage of free space after a full GC before an " \ 2346 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2347 range(0, 100) \ 2348 \ 2349 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2350 "Number of consecutive collections before gc time limit fires") \ 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 \ 2451 product(bool, PrintReferenceGC, false, \ 2452 "Print times spent handling reference objects during GC " \ 2453 "(enabled only when PrintGCDetails)") \ 2454 \ 2455 develop(bool, TraceReferenceGC, false, \ 2456 "Trace handling of soft/weak/final/phantom references") \ 2457 \ 2458 develop(bool, TraceFinalizerRegistration, false, \ 2459 "Trace registration of final references") \ 2460 \ 2461 notproduct(bool, TraceScavenge, false, \ 2462 "Trace scavenge") \ 2463 \ 2464 product(bool, IgnoreEmptyClassPaths, false, \ 2465 "Ignore empty path elements in -classpath") \ 2466 \ 2467 product(bool, TraceClassPaths, false, \ 2468 "Trace processing of class paths") \ 2469 \ 2470 product_rw(bool, TraceClassLoading, false, \ 2471 "Trace all classes loaded") \ 2472 \ 2473 product(bool, TraceClassLoadingPreorder, false, \ 2474 "Trace all classes loaded in order referenced (not loaded)") \ 2475 \ 2476 product_rw(bool, TraceClassUnloading, false, \ 2477 "Trace unloading of classes") \ 2478 \ 2479 product_rw(bool, TraceLoaderConstraints, false, \ 2480 "Trace loader constraints") \ 2481 \ 2482 develop(bool, TraceClassLoaderData, false, \ 2483 "Trace class loader loader_data lifetime") \ 2484 \ 2485 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2486 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2487 "Initial size of the boot class loader data metaspace") \ 2488 \ 2489 product(bool, TraceYoungGenTime, false, \ 2490 "Trace accumulated time for young collection") \ 2491 \ 2492 product(bool, TraceOldGenTime, false, \ 2493 "Trace accumulated time for old collection") \ 2494 \ 2495 product(bool, PrintTenuringDistribution, false, \ 2496 "Print tenuring age information") \ 2497 \ 2498 product_rw(bool, PrintHeapAtGC, false, \ 2499 "Print heap layout before and after each GC") \ 2500 \ 2501 product_rw(bool, PrintHeapAtGCExtended, false, \ 2502 "Print extended information about the layout of the heap " \ 2503 "when -XX:+PrintHeapAtGC is set") \ 2504 \ 2505 product(bool, PrintHeapAtSIGBREAK, true, \ 2506 "Print heap layout in response to SIGBREAK") \ 2507 \ 2508 manageable(bool, PrintClassHistogramBeforeFullGC, false, \ 2509 "Print a class histogram before any major stop-world GC") \ 2510 \ 2511 manageable(bool, PrintClassHistogramAfterFullGC, false, \ 2512 "Print a class histogram after any major stop-world GC") \ 2513 \ 2514 manageable(bool, PrintClassHistogram, false, \ 2515 "Print a histogram of class instances") \ 2516 \ 2517 develop(bool, TraceWorkGang, false, \ 2518 "Trace activities of work gangs") \ 2519 \ 2520 product(bool, TraceParallelOldGCTasks, false, \ 2521 "Trace multithreaded GC activity") \ 2522 \ 2523 develop(bool, TraceBlockOffsetTable, false, \ 2524 "Print BlockOffsetTable maps") \ 2525 \ 2526 develop(bool, TraceCardTableModRefBS, false, \ 2527 "Print CardTableModRefBS maps") \ 2528 \ 2529 develop(bool, TraceGCTaskManager, false, \ 2530 "Trace actions of the GC task manager") \ 2531 \ 2532 develop(bool, TraceGCTaskQueue, false, \ 2533 "Trace actions of the GC task queues") \ 2534 \ 2535 diagnostic(bool, TraceGCTaskThread, false, \ 2536 "Trace actions of the GC task threads") \ 2537 \ 2538 product(bool, PrintParallelOldGCPhaseTimes, false, \ 2539 "Print the time taken by each phase in ParallelOldGC " \ 2540 "(PrintGCDetails must also be enabled)") \ 2541 \ 2542 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2543 "Trace marking phase in ParallelOldGC") \ 2544 \ 2545 develop(bool, TraceParallelOldGCSummaryPhase, false, \ 2546 "Trace summary phase in ParallelOldGC") \ 2547 \ 2548 develop(bool, TraceParallelOldGCCompactionPhase, false, \ 2549 "Trace compaction phase in ParallelOldGC") \ 2550 \ 2551 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2552 "Trace dense prefix computation for ParallelOldGC") \ 2553 \ 2554 develop(bool, IgnoreLibthreadGPFault, false, \ 2555 "Suppress workaround for libthread GP fault") \ 2556 \ 2557 product(bool, PrintJNIGCStalls, false, \ 2558 "Print diagnostic message when GC is stalled " \ 2559 "by JNI critical section") \ 2560 \ 2561 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2562 "The percentage of the used heap that the instances of a class " \ 2563 "must occupy for the class to generate a trace event") \ 2564 \ 2565 /* GC log rotation setting */ \ 2566 \ 2567 product(bool, UseGCLogFileRotation, false, \ 2568 "Rotate gclog files (for long running applications). It requires "\ 2569 "-Xloggc:<filename>") \ 2570 \ 2571 product(uintx, NumberOfGCLogFiles, 0, \ 2572 "Number of gclog files in rotation " \ 2573 "(default: 0, no rotation)") \ 2574 \ 2575 product(size_t, GCLogFileSize, 8*K, \ 2576 "GC log file size, requires UseGCLogFileRotation. " \ 2577 "Set to 0 to only trigger rotation via jcmd") \ 2578 \ 2579 /* JVMTI heap profiling */ \ 2580 \ 2581 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2582 "Trace JVMTI object tagging calls") \ 2583 \ 2584 diagnostic(bool, VerifyBeforeIteration, false, \ 2585 "Verify memory system before JVMTI iteration") \ 2586 \ 2587 /* compiler interface */ \ 2588 \ 2589 develop(bool, CIPrintCompilerName, false, \ 2590 "when CIPrint is active, print the name of the active compiler") \ 2591 \ 2592 diagnostic(bool, CIPrintCompileQueue, false, \ 2593 "display the contents of the compile queue whenever a " \ 2594 "compilation is enqueued") \ 2595 \ 2596 develop(bool, CIPrintRequests, false, \ 2597 "display every request for compilation") \ 2598 \ 2599 product(bool, CITime, false, \ 2600 "collect timing information for compilation") \ 2601 \ 2602 develop(bool, CITimeVerbose, false, \ 2603 "be more verbose in compilation timings") \ 2604 \ 2605 develop(bool, CITimeEach, false, \ 2606 "display timing information after each successful compilation") \ 2607 \ 2608 develop(bool, CICountOSR, false, \ 2609 "use a separate counter when assigning ids to osr compilations") \ 2610 \ 2611 develop(bool, CICompileNatives, true, \ 2612 "compile native methods if supported by the compiler") \ 2613 \ 2614 develop_pd(bool, CICompileOSR, \ 2615 "compile on stack replacement methods if supported by the " \ 2616 "compiler") \ 2617 \ 2618 develop(bool, CIPrintMethodCodes, false, \ 2619 "print method bytecodes of the compiled code") \ 2620 \ 2621 develop(bool, CIPrintTypeFlow, false, \ 2622 "print the results of ciTypeFlow analysis") \ 2623 \ 2624 develop(bool, CITraceTypeFlow, false, \ 2625 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2626 \ 2627 develop(intx, OSROnlyBCI, -1, \ 2628 "OSR only at this bci. Negative values mean exclude that bci") \ 2629 \ 2630 /* compiler */ \ 2631 \ 2632 /* notice: the max range value here is max_jint, not max_intx */ \ 2633 /* because of overflow issue */ \ 2634 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2635 "Number of compiler threads to run") \ 2636 range((intx)Arguments::get_min_number_of_compiler_threads(), \ 2637 max_jint) \ 2638 \ 2639 product(intx, CompilationPolicyChoice, 0, \ 2640 "which compilation policy (0-3)") \ 2641 range(0, 3) \ 2642 \ 2643 develop(bool, UseStackBanging, true, \ 2644 "use stack banging for stack overflow checks (required for " \ 2645 "proper StackOverflow handling; disable only to measure cost " \ 2646 "of stackbanging)") \ 2647 \ 2648 develop(bool, UseStrictFP, true, \ 2649 "use strict fp if modifier strictfp is set") \ 2650 \ 2651 develop(bool, GenerateSynchronizationCode, true, \ 2652 "generate locking/unlocking code for synchronized methods and " \ 2653 "monitors") \ 2654 \ 2655 develop(bool, GenerateCompilerNullChecks, true, \ 2656 "Generate explicit null checks for loads/stores/calls") \ 2657 \ 2658 develop(bool, GenerateRangeChecks, true, \ 2659 "Generate range checks for array accesses") \ 2660 \ 2661 develop_pd(bool, ImplicitNullChecks, \ 2662 "Generate code for implicit null checks") \ 2663 \ 2664 product_pd(bool, TrapBasedNullChecks, \ 2665 "Generate code for null checks that uses a cmp and trap " \ 2666 "instruction raising SIGTRAP. This is only used if an access to" \ 2667 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2668 "ImplicitNullChecks don't work (PPC64).") \ 2669 \ 2670 product(bool, PrintSafepointStatistics, false, \ 2671 "Print statistics about safepoint synchronization") \ 2672 \ 2673 product(intx, PrintSafepointStatisticsCount, 300, \ 2674 "Total number of safepoint statistics collected " \ 2675 "before printing them out") \ 2676 \ 2677 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2678 "Print safepoint statistics only when safepoint takes " \ 2679 "more than PrintSafepointSatisticsTimeout in millis") \ 2680 \ 2681 product(bool, TraceSafepointCleanupTime, false, \ 2682 "Print the break down of clean up tasks performed during " \ 2683 "safepoint") \ 2684 \ 2685 product(bool, Inline, true, \ 2686 "Enable inlining") \ 2687 \ 2688 product(bool, ClipInlining, true, \ 2689 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2690 \ 2691 develop(bool, UseCHA, true, \ 2692 "Enable CHA") \ 2693 \ 2694 product(bool, UseTypeProfile, true, \ 2695 "Check interpreter profile for historically monomorphic calls") \ 2696 \ 2697 diagnostic(bool, PrintInlining, false, \ 2698 "Print inlining optimizations") \ 2699 \ 2700 product(bool, UsePopCountInstruction, false, \ 2701 "Use population count instruction") \ 2702 \ 2703 develop(bool, EagerInitialization, false, \ 2704 "Eagerly initialize classes if possible") \ 2705 \ 2706 develop(bool, TraceMethodReplacement, false, \ 2707 "Print when methods are replaced do to recompilation") \ 2708 \ 2709 develop(bool, PrintMethodFlushing, false, \ 2710 "Print the nmethods being flushed") \ 2711 \ 2712 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2713 "print statistics about method flushing") \ 2714 \ 2715 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2716 "Number of compiled code invocations after which " \ 2717 "the method is considered as hot by the flusher") \ 2718 \ 2719 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2720 "Minimum number of sweeper passes before an nmethod " \ 2721 "can be flushed") \ 2722 \ 2723 product(bool, UseCodeAging, true, \ 2724 "Insert counter to detect warm methods") \ 2725 \ 2726 diagnostic(bool, StressCodeAging, false, \ 2727 "Start with counters compiled in") \ 2728 \ 2729 develop(bool, UseRelocIndex, false, \ 2730 "Use an index to speed random access to relocations") \ 2731 \ 2732 develop(bool, StressCodeBuffers, false, \ 2733 "Exercise code buffer expansion and other rare state changes") \ 2734 \ 2735 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2736 "Generate extra debugging information for non-safepoints in " \ 2737 "nmethods") \ 2738 \ 2739 product(bool, PrintVMOptions, false, \ 2740 "Print flags that appeared on the command line") \ 2741 \ 2742 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2743 "Ignore unrecognized VM options") \ 2744 \ 2745 product(bool, PrintCommandLineFlags, false, \ 2746 "Print flags specified on command line or set by ergonomics") \ 2747 \ 2748 product(bool, PrintFlagsInitial, false, \ 2749 "Print all VM flags before argument processing and exit VM") \ 2750 \ 2751 product(bool, PrintFlagsFinal, false, \ 2752 "Print all VM flags after argument and ergonomic processing") \ 2753 \ 2754 notproduct(bool, PrintFlagsWithComments, false, \ 2755 "Print all VM flags with default values and descriptions and " \ 2756 "exit") \ 2757 \ 2758 product(bool, PrintFlagsRanges, false, \ 2759 "Print VM flags and their ranges and exit VM") \ 2760 \ 2761 diagnostic(bool, SerializeVMOutput, true, \ 2762 "Use a mutex to serialize output to tty and LogFile") \ 2763 \ 2764 diagnostic(bool, DisplayVMOutput, true, \ 2765 "Display all VM output on the tty, independently of LogVMOutput") \ 2766 \ 2767 diagnostic(bool, LogVMOutput, false, \ 2768 "Save VM output to LogFile") \ 2769 \ 2770 diagnostic(ccstr, LogFile, NULL, \ 2771 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2772 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2773 \ 2774 product(ccstr, ErrorFile, NULL, \ 2775 "If an error occurs, save the error data to this file " \ 2776 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2777 \ 2778 product(bool, DisplayVMOutputToStderr, false, \ 2779 "If DisplayVMOutput is true, display all VM output to stderr") \ 2780 \ 2781 product(bool, DisplayVMOutputToStdout, false, \ 2782 "If DisplayVMOutput is true, display all VM output to stdout") \ 2783 \ 2784 product(bool, UseHeavyMonitors, false, \ 2785 "use heavyweight instead of lightweight Java monitors") \ 2786 \ 2787 product(bool, PrintStringTableStatistics, false, \ 2788 "print statistics about the StringTable and SymbolTable") \ 2789 \ 2790 diagnostic(bool, VerifyStringTableAtExit, false, \ 2791 "verify StringTable contents at exit") \ 2792 \ 2793 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2794 "print histogram of the symbol table") \ 2795 \ 2796 notproduct(bool, ExitVMOnVerifyError, false, \ 2797 "standard exit from VM if bytecode verify error " \ 2798 "(only in debug mode)") \ 2799 \ 2800 notproduct(ccstr, AbortVMOnException, NULL, \ 2801 "Call fatal if this exception is thrown. Example: " \ 2802 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2803 \ 2804 notproduct(ccstr, AbortVMOnExceptionMessage, NULL, \ 2805 "Call fatal if the exception pointed by AbortVMOnException " \ 2806 "has this message") \ 2807 \ 2808 develop(bool, DebugVtables, false, \ 2809 "add debugging code to vtable dispatch") \ 2810 \ 2811 develop(bool, PrintVtables, false, \ 2812 "print vtables when printing klass") \ 2813 \ 2814 notproduct(bool, PrintVtableStats, false, \ 2815 "print vtables stats at end of run") \ 2816 \ 2817 develop(bool, TraceCreateZombies, false, \ 2818 "trace creation of zombie nmethods") \ 2819 \ 2820 notproduct(bool, IgnoreLockingAssertions, false, \ 2821 "disable locking assertions (for speed)") \ 2822 \ 2823 product(bool, RangeCheckElimination, true, \ 2824 "Eliminate range checks") \ 2825 \ 2826 develop_pd(bool, UncommonNullCast, \ 2827 "track occurrences of null in casts; adjust compiler tactics") \ 2828 \ 2829 develop(bool, TypeProfileCasts, true, \ 2830 "treat casts like calls for purposes of type profiling") \ 2831 \ 2832 develop(bool, DelayCompilationDuringStartup, true, \ 2833 "Delay invoking the compiler until main application class is " \ 2834 "loaded") \ 2835 \ 2836 develop(bool, CompileTheWorld, false, \ 2837 "Compile all methods in all classes in bootstrap class path " \ 2838 "(stress test)") \ 2839 \ 2840 develop(bool, CompileTheWorldPreloadClasses, true, \ 2841 "Preload all classes used by a class before start loading") \ 2842 \ 2843 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2844 "Force a safepoint every n compiles so sweeper can keep up") \ 2845 \ 2846 develop(bool, FillDelaySlots, true, \ 2847 "Fill delay slots (on SPARC only)") \ 2848 \ 2849 develop(bool, TimeLivenessAnalysis, false, \ 2850 "Time computation of bytecode liveness analysis") \ 2851 \ 2852 develop(bool, TraceLivenessGen, false, \ 2853 "Trace the generation of liveness analysis information") \ 2854 \ 2855 notproduct(bool, TraceLivenessQuery, false, \ 2856 "Trace queries of liveness analysis information") \ 2857 \ 2858 notproduct(bool, CollectIndexSetStatistics, false, \ 2859 "Collect information about IndexSets") \ 2860 \ 2861 develop(bool, UseLoopSafepoints, true, \ 2862 "Generate Safepoint nodes in every loop") \ 2863 \ 2864 develop(intx, FastAllocateSizeLimit, 128*K, \ 2865 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2866 "Inline allocations larger than this in doublewords must go slow")\ 2867 \ 2868 product(bool, AggressiveOpts, false, \ 2869 "Enable aggressive optimizations - see arguments.cpp") \ 2870 \ 2871 product_pd(uintx, TypeProfileLevel, \ 2872 "=XYZ, with Z: Type profiling of arguments at call; " \ 2873 "Y: Type profiling of return value at call; " \ 2874 "X: Type profiling of parameters to methods; " \ 2875 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2876 \ 2877 product(intx, TypeProfileArgsLimit, 2, \ 2878 "max number of call arguments to consider for type profiling") \ 2879 \ 2880 product(intx, TypeProfileParmsLimit, 2, \ 2881 "max number of incoming parameters to consider for type profiling"\ 2882 ", -1 for all") \ 2883 \ 2884 /* statistics */ \ 2885 develop(bool, CountCompiledCalls, false, \ 2886 "Count method invocations") \ 2887 \ 2888 notproduct(bool, CountRuntimeCalls, false, \ 2889 "Count VM runtime calls") \ 2890 \ 2891 develop(bool, CountJNICalls, false, \ 2892 "Count jni method invocations") \ 2893 \ 2894 notproduct(bool, CountJVMCalls, false, \ 2895 "Count jvm method invocations") \ 2896 \ 2897 notproduct(bool, CountRemovableExceptions, false, \ 2898 "Count exceptions that could be replaced by branches due to " \ 2899 "inlining") \ 2900 \ 2901 notproduct(bool, ICMissHistogram, false, \ 2902 "Produce histogram of IC misses") \ 2903 \ 2904 notproduct(bool, PrintClassStatistics, false, \ 2905 "Print class statistics at end of run") \ 2906 \ 2907 notproduct(bool, PrintMethodStatistics, false, \ 2908 "Print method statistics at end of run") \ 2909 \ 2910 /* interpreter */ \ 2911 develop(bool, ClearInterpreterLocals, false, \ 2912 "Always clear local variables of interpreter activations upon " \ 2913 "entry") \ 2914 \ 2915 product_pd(bool, RewriteBytecodes, \ 2916 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2917 \ 2918 product_pd(bool, RewriteFrequentPairs, \ 2919 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2920 \ 2921 diagnostic(bool, PrintInterpreter, false, \ 2922 "Print the generated interpreter code") \ 2923 \ 2924 product(bool, UseInterpreter, true, \ 2925 "Use interpreter for non-compiled methods") \ 2926 \ 2927 develop(bool, UseFastSignatureHandlers, true, \ 2928 "Use fast signature handlers for native calls") \ 2929 \ 2930 product(bool, UseLoopCounter, true, \ 2931 "Increment invocation counter on backward branch") \ 2932 \ 2933 product_pd(bool, UseOnStackReplacement, \ 2934 "Use on stack replacement, calls runtime if invoc. counter " \ 2935 "overflows in loop") \ 2936 \ 2937 notproduct(bool, TraceOnStackReplacement, false, \ 2938 "Trace on stack replacement") \ 2939 \ 2940 product_pd(bool, PreferInterpreterNativeStubs, \ 2941 "Use always interpreter stubs for native methods invoked via " \ 2942 "interpreter") \ 2943 \ 2944 develop(bool, CountBytecodes, false, \ 2945 "Count number of bytecodes executed") \ 2946 \ 2947 develop(bool, PrintBytecodeHistogram, false, \ 2948 "Print histogram of the executed bytecodes") \ 2949 \ 2950 develop(bool, PrintBytecodePairHistogram, false, \ 2951 "Print histogram of the executed bytecode pairs") \ 2952 \ 2953 diagnostic(bool, PrintSignatureHandlers, false, \ 2954 "Print code generated for native method signature handlers") \ 2955 \ 2956 develop(bool, VerifyOops, false, \ 2957 "Do plausibility checks for oops") \ 2958 \ 2959 develop(bool, CheckUnhandledOops, false, \ 2960 "Check for unhandled oops in VM code") \ 2961 \ 2962 develop(bool, VerifyJNIFields, trueInDebug, \ 2963 "Verify jfieldIDs for instance fields") \ 2964 \ 2965 notproduct(bool, VerifyJNIEnvThread, false, \ 2966 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2967 "from JNI") \ 2968 \ 2969 develop(bool, VerifyFPU, false, \ 2970 "Verify FPU state (check for NaN's, etc.)") \ 2971 \ 2972 develop(bool, VerifyThread, false, \ 2973 "Watch the thread register for corruption (SPARC only)") \ 2974 \ 2975 develop(bool, VerifyActivationFrameSize, false, \ 2976 "Verify that activation frame didn't become smaller than its " \ 2977 "minimal size") \ 2978 \ 2979 develop(bool, TraceFrequencyInlining, false, \ 2980 "Trace frequency based inlining") \ 2981 \ 2982 develop_pd(bool, InlineIntrinsics, \ 2983 "Inline intrinsics that can be statically resolved") \ 2984 \ 2985 product_pd(bool, ProfileInterpreter, \ 2986 "Profile at the bytecode level during interpretation") \ 2987 \ 2988 develop(bool, TraceProfileInterpreter, false, \ 2989 "Trace profiling at the bytecode level during interpretation. " \ 2990 "This outputs the profiling information collected to improve " \ 2991 "jit compilation.") \ 2992 \ 2993 develop_pd(bool, ProfileTraps, \ 2994 "Profile deoptimization traps at the bytecode level") \ 2995 \ 2996 product(intx, ProfileMaturityPercentage, 20, \ 2997 "number of method invocations/branches (expressed as % of " \ 2998 "CompileThreshold) before using the method's profile") \ 2999 range(0, 100) \ 3000 \ 3001 diagnostic(bool, PrintMethodData, false, \ 3002 "Print the results of +ProfileInterpreter at end of run") \ 3003 \ 3004 develop(bool, VerifyDataPointer, trueInDebug, \ 3005 "Verify the method data pointer during interpreter profiling") \ 3006 \ 3007 develop(bool, VerifyCompiledCode, false, \ 3008 "Include miscellaneous runtime verifications in nmethod code; " \ 3009 "default off because it disturbs nmethod size heuristics") \ 3010 \ 3011 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 3012 "Manually make GC thread crash then dump java stack trace; " \ 3013 "Test only") \ 3014 \ 3015 /* compilation */ \ 3016 product(bool, UseCompiler, true, \ 3017 "Use Just-In-Time compilation") \ 3018 \ 3019 develop(bool, TraceCompilationPolicy, false, \ 3020 "Trace compilation policy") \ 3021 \ 3022 develop(bool, TimeCompilationPolicy, false, \ 3023 "Time the compilation policy") \ 3024 \ 3025 product(bool, UseCounterDecay, true, \ 3026 "Adjust recompilation counters") \ 3027 \ 3028 develop(intx, CounterHalfLifeTime, 30, \ 3029 "Half-life time of invocation counters (in seconds)") \ 3030 \ 3031 develop(intx, CounterDecayMinIntervalLength, 500, \ 3032 "The minimum interval (in milliseconds) between invocation of " \ 3033 "CounterDecay") \ 3034 \ 3035 product(bool, AlwaysCompileLoopMethods, false, \ 3036 "When using recompilation, never interpret methods " \ 3037 "containing loops") \ 3038 \ 3039 product(bool, DontCompileHugeMethods, true, \ 3040 "Do not compile methods > HugeMethodLimit") \ 3041 \ 3042 /* Bytecode escape analysis estimation. */ \ 3043 product(bool, EstimateArgEscape, true, \ 3044 "Analyze bytecodes to estimate escape state of arguments") \ 3045 \ 3046 product(intx, BCEATraceLevel, 0, \ 3047 "How much tracing to do of bytecode escape analysis estimates") \ 3048 \ 3049 product(intx, MaxBCEAEstimateLevel, 5, \ 3050 "Maximum number of nested calls that are analyzed by BC EA") \ 3051 \ 3052 product(intx, MaxBCEAEstimateSize, 150, \ 3053 "Maximum bytecode size of a method to be analyzed by BC EA") \ 3054 \ 3055 product(intx, AllocatePrefetchStyle, 1, \ 3056 "0 = no prefetch, " \ 3057 "1 = prefetch instructions for each allocation, " \ 3058 "2 = use TLAB watermark to gate allocation prefetch, " \ 3059 "3 = use BIS instruction on Sparc for allocation prefetch") \ 3060 range(0, 3) \ 3061 \ 3062 product(intx, AllocatePrefetchDistance, -1, \ 3063 "Distance to prefetch ahead of allocation pointer") \ 3064 \ 3065 product(intx, AllocatePrefetchLines, 3, \ 3066 "Number of lines to prefetch ahead of array allocation pointer") \ 3067 \ 3068 product(intx, AllocateInstancePrefetchLines, 1, \ 3069 "Number of lines to prefetch ahead of instance allocation " \ 3070 "pointer") \ 3071 \ 3072 product(intx, AllocatePrefetchStepSize, 16, \ 3073 "Step size in bytes of sequential prefetch instructions") \ 3074 \ 3075 product(intx, AllocatePrefetchInstr, 0, \ 3076 "Prefetch instruction to prefetch ahead of allocation pointer") \ 3077 \ 3078 /* deoptimization */ \ 3079 develop(bool, TraceDeoptimization, false, \ 3080 "Trace deoptimization") \ 3081 \ 3082 develop(bool, DebugDeoptimization, false, \ 3083 "Tracing various information while debugging deoptimization") \ 3084 \ 3085 product(intx, SelfDestructTimer, 0, \ 3086 "Will cause VM to terminate after a given time (in minutes) " \ 3087 "(0 means off)") \ 3088 \ 3089 product(intx, MaxJavaStackTraceDepth, 1024, \ 3090 "The maximum number of lines in the stack trace for Java " \ 3091 "exceptions (0 means all)") \ 3092 \ 3093 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 3094 "Guarantee a safepoint (at least) every so many milliseconds " \ 3095 "(0 means none)")) \ 3096 \ 3097 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 3098 "Guarantee a safepoint (at least) every so many milliseconds " \ 3099 "(0 means none)")) \ 3100 \ 3101 product(intx, SafepointTimeoutDelay, 10000, \ 3102 "Delay in milliseconds for option SafepointTimeout") \ 3103 \ 3104 product(intx, NmethodSweepActivity, 10, \ 3105 "Removes cold nmethods from code cache if > 0. Higher values " \ 3106 "result in more aggressive sweeping") \ 3107 range(0, 2000) \ 3108 \ 3109 notproduct(bool, LogSweeper, false, \ 3110 "Keep a ring buffer of sweeper activity") \ 3111 \ 3112 notproduct(intx, SweeperLogEntries, 1024, \ 3113 "Number of records in the ring buffer of sweeper activity") \ 3114 \ 3115 notproduct(intx, MemProfilingInterval, 500, \ 3116 "Time between each invocation of the MemProfiler") \ 3117 \ 3118 develop(intx, MallocCatchPtr, -1, \ 3119 "Hit breakpoint when mallocing/freeing this pointer") \ 3120 \ 3121 notproduct(ccstrlist, SuppressErrorAt, "", \ 3122 "List of assertions (file:line) to muzzle") \ 3123 \ 3124 notproduct(size_t, HandleAllocationLimit, 1024, \ 3125 "Threshold for HandleMark allocation when +TraceHandleAllocation "\ 3126 "is used") \ 3127 \ 3128 develop(size_t, TotalHandleAllocationLimit, 1024, \ 3129 "Threshold for total handle allocation when " \ 3130 "+TraceHandleAllocation is used") \ 3131 \ 3132 develop(intx, StackPrintLimit, 100, \ 3133 "number of stack frames to print in VM-level stack dump") \ 3134 \ 3135 notproduct(intx, MaxElementPrintSize, 256, \ 3136 "maximum number of elements to print") \ 3137 \ 3138 notproduct(intx, MaxSubklassPrintSize, 4, \ 3139 "maximum number of subklasses to print when printing klass") \ 3140 \ 3141 product(intx, MaxInlineLevel, 9, \ 3142 "maximum number of nested calls that are inlined") \ 3143 \ 3144 product(intx, MaxRecursiveInlineLevel, 1, \ 3145 "maximum number of nested recursive calls that are inlined") \ 3146 \ 3147 develop(intx, MaxForceInlineLevel, 100, \ 3148 "maximum number of nested calls that are forced for inlining " \ 3149 "(using CompilerOracle or marked w/ @ForceInline)") \ 3150 \ 3151 product_pd(intx, InlineSmallCode, \ 3152 "Only inline already compiled methods if their code size is " \ 3153 "less than this") \ 3154 \ 3155 product(intx, MaxInlineSize, 35, \ 3156 "The maximum bytecode size of a method to be inlined") \ 3157 \ 3158 product_pd(intx, FreqInlineSize, \ 3159 "The maximum bytecode size of a frequent method to be inlined") \ 3160 \ 3161 product(intx, MaxTrivialSize, 6, \ 3162 "The maximum bytecode size of a trivial method to be inlined") \ 3163 \ 3164 product(intx, MinInliningThreshold, 250, \ 3165 "The minimum invocation count a method needs to have to be " \ 3166 "inlined") \ 3167 \ 3168 develop(intx, MethodHistogramCutoff, 100, \ 3169 "The cutoff value for method invocation histogram (+CountCalls)") \ 3170 \ 3171 develop(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3172 "Number of interpreted methods to show in profile") \ 3173 \ 3174 develop(intx, ProfilerNumberOfCompiledMethods, 25, \ 3175 "Number of compiled methods to show in profile") \ 3176 \ 3177 develop(intx, ProfilerNumberOfStubMethods, 25, \ 3178 "Number of stub methods to show in profile") \ 3179 \ 3180 develop(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3181 "Number of runtime stub nodes to show in profile") \ 3182 \ 3183 product(intx, ProfileIntervalsTicks, 100, \ 3184 "Number of ticks between printing of interval profile " \ 3185 "(+ProfileIntervals)") \ 3186 \ 3187 notproduct(intx, ScavengeALotInterval, 1, \ 3188 "Interval between which scavenge will occur with +ScavengeALot") \ 3189 \ 3190 notproduct(intx, FullGCALotInterval, 1, \ 3191 "Interval between which full gc will occur with +FullGCALot") \ 3192 \ 3193 notproduct(intx, FullGCALotStart, 0, \ 3194 "For which invocation to start FullGCAlot") \ 3195 \ 3196 notproduct(intx, FullGCALotDummies, 32*K, \ 3197 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3198 "to move") \ 3199 \ 3200 develop(intx, DontYieldALotInterval, 10, \ 3201 "Interval between which yields will be dropped (milliseconds)") \ 3202 \ 3203 develop(intx, MinSleepInterval, 1, \ 3204 "Minimum sleep() interval (milliseconds) when " \ 3205 "ConvertSleepToYield is off (used for Solaris)") \ 3206 \ 3207 develop(intx, ProfilerPCTickThreshold, 15, \ 3208 "Number of ticks in a PC buckets to be a hotspot") \ 3209 \ 3210 notproduct(intx, DeoptimizeALotInterval, 5, \ 3211 "Number of exits until DeoptimizeALot kicks in") \ 3212 \ 3213 notproduct(intx, ZombieALotInterval, 5, \ 3214 "Number of exits until ZombieALot kicks in") \ 3215 \ 3216 diagnostic(intx, MallocVerifyInterval, 0, \ 3217 "If non-zero, verify C heap after every N calls to " \ 3218 "malloc/realloc/free") \ 3219 \ 3220 diagnostic(intx, MallocVerifyStart, 0, \ 3221 "If non-zero, start verifying C heap after Nth call to " \ 3222 "malloc/realloc/free") \ 3223 \ 3224 diagnostic(uintx, MallocMaxTestWords, 0, \ 3225 "If non-zero, maximum number of words that malloc/realloc can " \ 3226 "allocate (for testing only)") \ 3227 \ 3228 product(intx, TypeProfileWidth, 2, \ 3229 "Number of receiver types to record in call/cast profile") \ 3230 \ 3231 develop(intx, BciProfileWidth, 2, \ 3232 "Number of return bci's to record in ret profile") \ 3233 \ 3234 product(intx, PerMethodRecompilationCutoff, 400, \ 3235 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3236 range(-1, max_intx) \ 3237 \ 3238 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3239 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3240 range(-1, max_intx) \ 3241 \ 3242 product(intx, PerMethodTrapLimit, 100, \ 3243 "Limit on traps (of one kind) in a method (includes inlines)") \ 3244 \ 3245 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3246 "Limit on speculative traps (of one kind) in a method " \ 3247 "(includes inlines)") \ 3248 \ 3249 product(intx, PerBytecodeTrapLimit, 4, \ 3250 "Limit on traps (of one kind) at a particular BCI") \ 3251 \ 3252 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3253 "Extra method data trap entries for speculation") \ 3254 \ 3255 develop(intx, InlineFrequencyRatio, 20, \ 3256 "Ratio of call site execution to caller method invocation") \ 3257 \ 3258 develop_pd(intx, InlineFrequencyCount, \ 3259 "Count of call site execution necessary to trigger frequent " \ 3260 "inlining") \ 3261 \ 3262 develop(intx, InlineThrowCount, 50, \ 3263 "Force inlining of interpreted methods that throw this often") \ 3264 \ 3265 develop(intx, InlineThrowMaxSize, 200, \ 3266 "Force inlining of throwing methods smaller than this") \ 3267 \ 3268 develop(intx, ProfilerNodeSize, 1024, \ 3269 "Size in K to allocate for the Profile Nodes of each thread") \ 3270 \ 3271 product_pd(intx, PreInflateSpin, \ 3272 "Number of times to spin wait before inflation") \ 3273 \ 3274 /* gc parameters */ \ 3275 product(size_t, InitialHeapSize, 0, \ 3276 "Initial heap size (in bytes); zero means use ergonomics") \ 3277 \ 3278 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3279 "Maximum heap size (in bytes)") \ 3280 \ 3281 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3282 "Initial tenured generation size (in bytes)") \ 3283 \ 3284 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3285 "Initial new generation size (in bytes)") \ 3286 \ 3287 product(size_t, MaxNewSize, max_uintx, \ 3288 "Maximum new generation size (in bytes), max_uintx means set " \ 3289 "ergonomically") \ 3290 \ 3291 product(size_t, PretenureSizeThreshold, 0, \ 3292 "Maximum size in bytes of objects allocated in DefNew " \ 3293 "generation; zero means no maximum") \ 3294 \ 3295 product(size_t, TLABSize, 0, \ 3296 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3297 \ 3298 product(size_t, MinTLABSize, 2*K, \ 3299 "Minimum allowed TLAB size (in bytes)") \ 3300 range(1, max_uintx) \ 3301 \ 3302 product(uintx, TLABAllocationWeight, 35, \ 3303 "Allocation averaging weight") \ 3304 range(0, 100) \ 3305 \ 3306 /* Limit the lower bound of this flag to 1 as it is used */ \ 3307 /* in a division expression. */ \ 3308 product(uintx, TLABWasteTargetPercent, 1, \ 3309 "Percentage of Eden that can be wasted") \ 3310 range(1, 100) \ 3311 \ 3312 product(uintx, TLABRefillWasteFraction, 64, \ 3313 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3314 range(1, max_uintx) \ 3315 \ 3316 product(uintx, TLABWasteIncrement, 4, \ 3317 "Increment allowed waste at slow allocation") \ 3318 \ 3319 product(uintx, SurvivorRatio, 8, \ 3320 "Ratio of eden/survivor space size") \ 3321 \ 3322 product(uintx, NewRatio, 2, \ 3323 "Ratio of old/new generation sizes") \ 3324 \ 3325 product_pd(size_t, NewSizeThreadIncrease, \ 3326 "Additional size added to desired new generation size per " \ 3327 "non-daemon thread (in bytes)") \ 3328 \ 3329 product_pd(size_t, MetaspaceSize, \ 3330 "Initial size of Metaspaces (in bytes)") \ 3331 \ 3332 product(size_t, MaxMetaspaceSize, max_uintx, \ 3333 "Maximum size of Metaspaces (in bytes)") \ 3334 \ 3335 product(size_t, CompressedClassSpaceSize, 1*G, \ 3336 "Maximum size of class area in Metaspace when compressed " \ 3337 "class pointers are used") \ 3338 range(1*M, 3*G) \ 3339 \ 3340 manageable(uintx, MinHeapFreeRatio, 40, \ 3341 "The minimum percentage of heap free after GC to avoid expansion."\ 3342 " For most GCs this applies to the old generation. In G1 and" \ 3343 " ParallelGC it applies to the whole heap.") \ 3344 range(0, 100) \ 3345 constraint(MinHeapFreeRatioConstraintFunc) \ 3346 \ 3347 manageable(uintx, MaxHeapFreeRatio, 70, \ 3348 "The maximum percentage of heap free after GC to avoid shrinking."\ 3349 " For most GCs this applies to the old generation. In G1 and" \ 3350 " ParallelGC it applies to the whole heap.") \ 3351 range(0, 100) \ 3352 constraint(MaxHeapFreeRatioConstraintFunc) \ 3353 \ 3354 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3355 "Number of milliseconds per MB of free space in the heap") \ 3356 \ 3357 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3358 "The minimum change in heap space due to GC (in bytes)") \ 3359 \ 3360 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3361 "The minimum expansion of Metaspace (in bytes)") \ 3362 \ 3363 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3364 "The maximum percentage of Metaspace free after GC to avoid " \ 3365 "shrinking") \ 3366 range(0, 100) \ 3367 constraint(MaxMetaspaceFreeRatioConstraintFunc) \ 3368 \ 3369 product(uintx, MinMetaspaceFreeRatio, 40, \ 3370 "The minimum percentage of Metaspace free after GC to avoid " \ 3371 "expansion") \ 3372 range(0, 99) \ 3373 constraint(MinMetaspaceFreeRatioConstraintFunc) \ 3374 \ 3375 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3376 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3377 \ 3378 product(uintx, QueuedAllocationWarningCount, 0, \ 3379 "Number of times an allocation that queues behind a GC " \ 3380 "will retry before printing a warning") \ 3381 \ 3382 diagnostic(uintx, VerifyGCStartAt, 0, \ 3383 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3384 \ 3385 diagnostic(intx, VerifyGCLevel, 0, \ 3386 "Generation level at which to start +VerifyBefore/AfterGC") \ 3387 \ 3388 product(uintx, MaxTenuringThreshold, 15, \ 3389 "Maximum value for tenuring threshold") \ 3390 range(0, markOopDesc::max_age + 1) \ 3391 constraint(MaxTenuringThresholdConstraintFunc) \ 3392 \ 3393 product(uintx, InitialTenuringThreshold, 7, \ 3394 "Initial value for tenuring threshold") \ 3395 range(0, markOopDesc::max_age + 1) \ 3396 constraint(InitialTenuringThresholdConstraintFunc) \ 3397 \ 3398 product(uintx, TargetSurvivorRatio, 50, \ 3399 "Desired percentage of survivor space used after scavenge") \ 3400 range(0, 100) \ 3401 \ 3402 product(uintx, MarkSweepDeadRatio, 5, \ 3403 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3404 "Serial mark sweep treats this as both the minimum and maximum " \ 3405 "value. " \ 3406 "CMS uses this value only if it falls back to mark sweep. " \ 3407 "Par compact uses a variable scale based on the density of the " \ 3408 "generation and treats this as the maximum value when the heap " \ 3409 "is either completely full or completely empty. Par compact " \ 3410 "also has a smaller default value; see arguments.cpp.") \ 3411 range(0, 100) \ 3412 \ 3413 product(uintx, MarkSweepAlwaysCompactCount, 4, \ 3414 "How often should we fully compact the heap (ignoring the dead " \ 3415 "space parameters)") \ 3416 range(1, max_uintx) \ 3417 \ 3418 product(intx, PrintCMSStatistics, 0, \ 3419 "Statistics for CMS") \ 3420 \ 3421 product(bool, PrintCMSInitiationStatistics, false, \ 3422 "Statistics for initiating a CMS collection") \ 3423 \ 3424 product(intx, PrintFLSStatistics, 0, \ 3425 "Statistics for CMS' FreeListSpace") \ 3426 \ 3427 product(intx, PrintFLSCensus, 0, \ 3428 "Census for CMS' FreeListSpace") \ 3429 \ 3430 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3431 "Delay between expansion and allocation (in milliseconds)") \ 3432 \ 3433 develop(uintx, GCWorkerDelayMillis, 0, \ 3434 "Delay in scheduling GC workers (in milliseconds)") \ 3435 \ 3436 product(intx, DeferThrSuspendLoopCount, 4000, \ 3437 "(Unstable) Number of times to iterate in safepoint loop " \ 3438 "before blocking VM threads ") \ 3439 \ 3440 product(intx, DeferPollingPageLoopCount, -1, \ 3441 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3442 "before changing safepoint polling page to RO ") \ 3443 \ 3444 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3445 \ 3446 product(bool, PSChunkLargeArrays, true, \ 3447 "Process large arrays in chunks") \ 3448 \ 3449 product(uintx, GCDrainStackTargetSize, 64, \ 3450 "Number of entries we will try to leave on the stack " \ 3451 "during parallel gc") \ 3452 \ 3453 /* stack parameters */ \ 3454 product_pd(intx, StackYellowPages, \ 3455 "Number of yellow zone (recoverable overflows) pages") \ 3456 range(1, max_intx) \ 3457 \ 3458 product_pd(intx, StackRedPages, \ 3459 "Number of red zone (unrecoverable overflows) pages") \ 3460 range(1, max_intx) \ 3461 \ 3462 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3463 product_pd(intx, StackShadowPages, \ 3464 "Number of shadow zone (for overflow checking) pages " \ 3465 "this should exceed the depth of the VM and native call stack") \ 3466 range(1, 50) \ 3467 \ 3468 product_pd(intx, ThreadStackSize, \ 3469 "Thread Stack Size (in Kbytes)") \ 3470 \ 3471 product_pd(intx, VMThreadStackSize, \ 3472 "Non-Java Thread Stack Size (in Kbytes)") \ 3473 \ 3474 product_pd(intx, CompilerThreadStackSize, \ 3475 "Compiler Thread Stack Size (in Kbytes)") \ 3476 \ 3477 develop_pd(size_t, JVMInvokeMethodSlack, \ 3478 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3479 \ 3480 /* code cache parameters */ \ 3481 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3482 develop(uintx, CodeCacheSegmentSize, 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)),\ 3483 "Code cache segment size (in bytes) - smallest unit of " \ 3484 "allocation") \ 3485 range(1, 1024) \ 3486 \ 3487 develop_pd(intx, CodeEntryAlignment, \ 3488 "Code entry alignment for generated code (in bytes)") \ 3489 \ 3490 product_pd(intx, OptoLoopAlignment, \ 3491 "Align inner loops to zero relative to this modulus") \ 3492 \ 3493 product_pd(uintx, InitialCodeCacheSize, \ 3494 "Initial code cache size (in bytes)") \ 3495 \ 3496 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3497 "Minimum code cache size (in bytes) required to start VM.") \ 3498 \ 3499 product(bool, SegmentedCodeCache, false, \ 3500 "Use a segmented code cache") \ 3501 \ 3502 product_pd(uintx, ReservedCodeCacheSize, \ 3503 "Reserved code cache size (in bytes) - maximum code cache size") \ 3504 \ 3505 product_pd(uintx, NonProfiledCodeHeapSize, \ 3506 "Size of code heap with non-profiled methods (in bytes)") \ 3507 \ 3508 product_pd(uintx, ProfiledCodeHeapSize, \ 3509 "Size of code heap with profiled methods (in bytes)") \ 3510 \ 3511 product_pd(uintx, NonNMethodCodeHeapSize, \ 3512 "Size of code heap with non-nmethods (in bytes)") \ 3513 \ 3514 product_pd(uintx, CodeCacheExpansionSize, \ 3515 "Code cache expansion size (in bytes)") \ 3516 \ 3517 develop_pd(uintx, CodeCacheMinBlockLength, \ 3518 "Minimum number of segments in a code cache block") \ 3519 range(1, 100) \ 3520 \ 3521 notproduct(bool, ExitOnFullCodeCache, false, \ 3522 "Exit the VM if we fill the code cache") \ 3523 \ 3524 product(bool, UseCodeCacheFlushing, true, \ 3525 "Remove cold/old nmethods from the code cache") \ 3526 \ 3527 product(uintx, StartAggressiveSweepingAt, 10, \ 3528 "Start aggressive sweeping if X[%] of the code cache is free." \ 3529 "Segmented code cache: X[%] of the non-profiled heap." \ 3530 "Non-segmented code cache: X[%] of the total code cache") \ 3531 range(0, 100) \ 3532 \ 3533 /* interpreter debugging */ \ 3534 develop(intx, BinarySwitchThreshold, 5, \ 3535 "Minimal number of lookupswitch entries for rewriting to binary " \ 3536 "switch") \ 3537 \ 3538 develop(intx, StopInterpreterAt, 0, \ 3539 "Stop interpreter execution at specified bytecode number") \ 3540 \ 3541 develop(intx, TraceBytecodesAt, 0, \ 3542 "Trace bytecodes starting with specified bytecode number") \ 3543 \ 3544 /* compiler interface */ \ 3545 develop(intx, CIStart, 0, \ 3546 "The id of the first compilation to permit") \ 3547 \ 3548 develop(intx, CIStop, max_jint, \ 3549 "The id of the last compilation to permit") \ 3550 \ 3551 develop(intx, CIStartOSR, 0, \ 3552 "The id of the first osr compilation to permit " \ 3553 "(CICountOSR must be on)") \ 3554 \ 3555 develop(intx, CIStopOSR, max_jint, \ 3556 "The id of the last osr compilation to permit " \ 3557 "(CICountOSR must be on)") \ 3558 \ 3559 develop(intx, CIBreakAtOSR, -1, \ 3560 "The id of osr compilation to break at") \ 3561 \ 3562 develop(intx, CIBreakAt, -1, \ 3563 "The id of compilation to break at") \ 3564 \ 3565 product(ccstrlist, CompileOnly, "", \ 3566 "List of methods (pkg/class.name) to restrict compilation to") \ 3567 \ 3568 product(ccstr, CompileCommandFile, NULL, \ 3569 "Read compiler commands from this file [.hotspot_compiler]") \ 3570 \ 3571 product(ccstrlist, CompileCommand, "", \ 3572 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3573 \ 3574 develop(bool, ReplayCompiles, false, \ 3575 "Enable replay of compilations from ReplayDataFile") \ 3576 \ 3577 product(ccstr, ReplayDataFile, NULL, \ 3578 "File containing compilation replay information" \ 3579 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3580 \ 3581 product(ccstr, InlineDataFile, NULL, \ 3582 "File containing inlining replay information" \ 3583 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3584 \ 3585 develop(intx, ReplaySuppressInitializers, 2, \ 3586 "Control handling of class initialization during replay: " \ 3587 "0 - don't do anything special; " \ 3588 "1 - treat all class initializers as empty; " \ 3589 "2 - treat class initializers for application classes as empty; " \ 3590 "3 - allow all class initializers to run during bootstrap but " \ 3591 " pretend they are empty after starting replay") \ 3592 range(0, 3) \ 3593 \ 3594 develop(bool, ReplayIgnoreInitErrors, false, \ 3595 "Ignore exceptions thrown during initialization for replay") \ 3596 \ 3597 product(bool, DumpReplayDataOnError, true, \ 3598 "Record replay data for crashing compiler threads") \ 3599 \ 3600 product(bool, CICompilerCountPerCPU, false, \ 3601 "1 compiler thread for log(N CPUs)") \ 3602 \ 3603 develop(intx, CIFireOOMAt, -1, \ 3604 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3605 "(non-negative value throws OOM after this many CI accesses " \ 3606 "in each compile)") \ 3607 notproduct(intx, CICrashAt, -1, \ 3608 "id of compilation to trigger assert in compiler thread for " \ 3609 "the purpose of testing, e.g. generation of replay data") \ 3610 notproduct(bool, CIObjectFactoryVerify, false, \ 3611 "enable potentially expensive verification in ciObjectFactory") \ 3612 \ 3613 /* Priorities */ \ 3614 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3615 \ 3616 product(intx, ThreadPriorityPolicy, 0, \ 3617 "0 : Normal. "\ 3618 " VM chooses priorities that are appropriate for normal "\ 3619 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3620 " to normal native priority. Java priorities below " \ 3621 " NORM_PRIORITY map to lower native priority values. On "\ 3622 " Windows applications are allowed to use higher native "\ 3623 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3624 " not use the highest possible native priority, "\ 3625 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3626 " system threads. On Linux thread priorities are ignored "\ 3627 " because the OS does not support static priority in "\ 3628 " SCHED_OTHER scheduling class which is the only choice for "\ 3629 " non-root, non-realtime applications. "\ 3630 "1 : Aggressive. "\ 3631 " Java thread priorities map over to the entire range of "\ 3632 " native thread priorities. Higher Java thread priorities map "\ 3633 " to higher native thread priorities. This policy should be "\ 3634 " used with care, as sometimes it can cause performance "\ 3635 " degradation in the application and/or the entire system. On "\ 3636 " Linux this policy requires root privilege.") \ 3637 range(0, 1) \ 3638 \ 3639 product(bool, ThreadPriorityVerbose, false, \ 3640 "Print priority changes") \ 3641 \ 3642 product(intx, CompilerThreadPriority, -1, \ 3643 "The native priority at which compiler threads should run " \ 3644 "(-1 means no change)") \ 3645 \ 3646 product(intx, VMThreadPriority, -1, \ 3647 "The native priority at which the VM thread should run " \ 3648 "(-1 means no change)") \ 3649 \ 3650 product(bool, CompilerThreadHintNoPreempt, true, \ 3651 "(Solaris only) Give compiler threads an extra quanta") \ 3652 \ 3653 product(bool, VMThreadHintNoPreempt, false, \ 3654 "(Solaris only) Give VM thread an extra quanta") \ 3655 \ 3656 product(intx, JavaPriority1_To_OSPriority, -1, \ 3657 "Map Java priorities to OS priorities") \ 3658 \ 3659 product(intx, JavaPriority2_To_OSPriority, -1, \ 3660 "Map Java priorities to OS priorities") \ 3661 \ 3662 product(intx, JavaPriority3_To_OSPriority, -1, \ 3663 "Map Java priorities to OS priorities") \ 3664 \ 3665 product(intx, JavaPriority4_To_OSPriority, -1, \ 3666 "Map Java priorities to OS priorities") \ 3667 \ 3668 product(intx, JavaPriority5_To_OSPriority, -1, \ 3669 "Map Java priorities to OS priorities") \ 3670 \ 3671 product(intx, JavaPriority6_To_OSPriority, -1, \ 3672 "Map Java priorities to OS priorities") \ 3673 \ 3674 product(intx, JavaPriority7_To_OSPriority, -1, \ 3675 "Map Java priorities to OS priorities") \ 3676 \ 3677 product(intx, JavaPriority8_To_OSPriority, -1, \ 3678 "Map Java priorities to OS priorities") \ 3679 \ 3680 product(intx, JavaPriority9_To_OSPriority, -1, \ 3681 "Map Java priorities to OS priorities") \ 3682 \ 3683 product(intx, JavaPriority10_To_OSPriority,-1, \ 3684 "Map Java priorities to OS priorities") \ 3685 \ 3686 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3687 "Java thread priority 10 maps to critical scheduling priority") \ 3688 \ 3689 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3690 "Compiler thread(s) run at critical scheduling priority") \ 3691 \ 3692 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3693 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3694 \ 3695 /* compiler debugging */ \ 3696 notproduct(intx, CompileTheWorldStartAt, 1, \ 3697 "First class to consider when using +CompileTheWorld") \ 3698 \ 3699 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3700 "Last class to consider when using +CompileTheWorld") \ 3701 \ 3702 develop(intx, NewCodeParameter, 0, \ 3703 "Testing Only: Create a dedicated integer parameter before " \ 3704 "putback") \ 3705 \ 3706 /* new oopmap storage allocation */ \ 3707 develop(intx, MinOopMapAllocation, 8, \ 3708 "Minimum number of OopMap entries in an OopMapSet") \ 3709 \ 3710 /* Background Compilation */ \ 3711 develop(intx, LongCompileThreshold, 50, \ 3712 "Used with +TraceLongCompiles") \ 3713 \ 3714 product(intx, StarvationMonitorInterval, 200, \ 3715 "Pause between each check (in milliseconds)") \ 3716 \ 3717 /* recompilation */ \ 3718 product_pd(intx, CompileThreshold, \ 3719 "number of interpreted method invocations before (re-)compiling") \ 3720 \ 3721 product(double, CompileThresholdScaling, 1.0, \ 3722 "Factor to control when first compilation happens " \ 3723 "(both with and without tiered compilation): " \ 3724 "values greater than 1.0 delay counter overflow, " \ 3725 "values between 0 and 1.0 rush counter overflow, " \ 3726 "value of 1.0 leaves compilation thresholds unchanged " \ 3727 "value of 0.0 is equivalent to -Xint. " \ 3728 "" \ 3729 "Flag can be set as per-method option. " \ 3730 "If a value is specified for a method, compilation thresholds " \ 3731 "for that method are scaled by both the value of the global flag "\ 3732 "and the value of the per-method flag.") \ 3733 \ 3734 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3735 "Interpreter (tier 0) invocation notification frequency") \ 3736 \ 3737 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3738 "C1 without MDO (tier 2) invocation notification frequency") \ 3739 \ 3740 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3741 "C1 with MDO profiling (tier 3) invocation notification " \ 3742 "frequency") \ 3743 \ 3744 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3745 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3746 \ 3747 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3748 "Interpreter (tier 0) invocation notification frequency") \ 3749 \ 3750 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3751 "C1 without MDO (tier 2) invocation notification frequency") \ 3752 \ 3753 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3754 "C1 with MDO profiling (tier 3) invocation notification " \ 3755 "frequency") \ 3756 \ 3757 product(intx, Tier2CompileThreshold, 0, \ 3758 "threshold at which tier 2 compilation is invoked") \ 3759 \ 3760 product(intx, Tier2BackEdgeThreshold, 0, \ 3761 "Back edge threshold at which tier 2 compilation is invoked") \ 3762 \ 3763 product(intx, Tier3InvocationThreshold, 200, \ 3764 "Compile if number of method invocations crosses this " \ 3765 "threshold") \ 3766 \ 3767 product(intx, Tier3MinInvocationThreshold, 100, \ 3768 "Minimum invocation to compile at tier 3") \ 3769 \ 3770 product(intx, Tier3CompileThreshold, 2000, \ 3771 "Threshold at which tier 3 compilation is invoked (invocation " \ 3772 "minimum must be satisfied") \ 3773 \ 3774 product(intx, Tier3BackEdgeThreshold, 60000, \ 3775 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3776 \ 3777 product(intx, Tier4InvocationThreshold, 5000, \ 3778 "Compile if number of method invocations crosses this " \ 3779 "threshold") \ 3780 \ 3781 product(intx, Tier4MinInvocationThreshold, 600, \ 3782 "Minimum invocation to compile at tier 4") \ 3783 \ 3784 product(intx, Tier4CompileThreshold, 15000, \ 3785 "Threshold at which tier 4 compilation is invoked (invocation " \ 3786 "minimum must be satisfied") \ 3787 \ 3788 product(intx, Tier4BackEdgeThreshold, 40000, \ 3789 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3790 \ 3791 product(intx, Tier3DelayOn, 5, \ 3792 "If C2 queue size grows over this amount per compiler thread " \ 3793 "stop compiling at tier 3 and start compiling at tier 2") \ 3794 \ 3795 product(intx, Tier3DelayOff, 2, \ 3796 "If C2 queue size is less than this amount per compiler thread " \ 3797 "allow methods compiled at tier 2 transition to tier 3") \ 3798 \ 3799 product(intx, Tier3LoadFeedback, 5, \ 3800 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3801 "reaches this amount per compiler thread") \ 3802 \ 3803 product(intx, Tier4LoadFeedback, 3, \ 3804 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3805 "reaches this amount per compiler thread") \ 3806 \ 3807 product(intx, TieredCompileTaskTimeout, 50, \ 3808 "Kill compile task if method was not used within " \ 3809 "given timeout in milliseconds") \ 3810 \ 3811 product(intx, TieredStopAtLevel, 4, \ 3812 "Stop at given compilation level") \ 3813 \ 3814 product(intx, Tier0ProfilingStartPercentage, 200, \ 3815 "Start profiling in interpreter if the counters exceed tier 3 " \ 3816 "thresholds by the specified percentage") \ 3817 \ 3818 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3819 "Increase the compile threshold for C1 compilation if the code " \ 3820 "cache is filled by the specified percentage") \ 3821 range(0, 99) \ 3822 \ 3823 product(intx, TieredRateUpdateMinTime, 1, \ 3824 "Minimum rate sampling interval (in milliseconds)") \ 3825 \ 3826 product(intx, TieredRateUpdateMaxTime, 25, \ 3827 "Maximum rate sampling interval (in milliseconds)") \ 3828 \ 3829 product_pd(bool, TieredCompilation, \ 3830 "Enable tiered compilation") \ 3831 \ 3832 product(bool, PrintTieredEvents, false, \ 3833 "Print tiered events notifications") \ 3834 \ 3835 product_pd(intx, OnStackReplacePercentage, \ 3836 "NON_TIERED number of method invocations/branches (expressed as " \ 3837 "% of CompileThreshold) before (re-)compiling OSR code") \ 3838 \ 3839 product(intx, InterpreterProfilePercentage, 33, \ 3840 "NON_TIERED number of method invocations/branches (expressed as " \ 3841 "% of CompileThreshold) before profiling in the interpreter") \ 3842 range(0, 100) \ 3843 \ 3844 develop(intx, MaxRecompilationSearchLength, 10, \ 3845 "The maximum number of frames to inspect when searching for " \ 3846 "recompilee") \ 3847 \ 3848 develop(intx, MaxInterpretedSearchLength, 3, \ 3849 "The maximum number of interpreted frames to skip when searching "\ 3850 "for recompilee") \ 3851 \ 3852 develop(intx, DesiredMethodLimit, 8000, \ 3853 "The desired maximum method size (in bytecodes) after inlining") \ 3854 \ 3855 develop(intx, HugeMethodLimit, 8000, \ 3856 "Don't compile methods larger than this if " \ 3857 "+DontCompileHugeMethods") \ 3858 \ 3859 /* New JDK 1.4 reflection implementation */ \ 3860 \ 3861 develop(intx, FastSuperclassLimit, 8, \ 3862 "Depth of hardwired instanceof accelerator array") \ 3863 \ 3864 /* Properties for Java libraries */ \ 3865 \ 3866 product(size_t, MaxDirectMemorySize, 0, \ 3867 "Maximum total size of NIO direct-buffer allocations") \ 3868 \ 3869 /* Flags used for temporary code during development */ \ 3870 \ 3871 diagnostic(bool, UseNewCode, false, \ 3872 "Testing Only: Use the new version while testing") \ 3873 \ 3874 diagnostic(bool, UseNewCode2, false, \ 3875 "Testing Only: Use the new version while testing") \ 3876 \ 3877 diagnostic(bool, UseNewCode3, false, \ 3878 "Testing Only: Use the new version while testing") \ 3879 \ 3880 /* flags for performance data collection */ \ 3881 \ 3882 product(bool, UsePerfData, falseInEmbedded, \ 3883 "Flag to disable jvmstat instrumentation for performance testing "\ 3884 "and problem isolation purposes") \ 3885 \ 3886 product(bool, PerfDataSaveToFile, false, \ 3887 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3888 \ 3889 product(ccstr, PerfDataSaveFile, NULL, \ 3890 "Save PerfData memory to the specified absolute pathname. " \ 3891 "The string %p in the file name (if present) " \ 3892 "will be replaced by pid") \ 3893 \ 3894 product(intx, PerfDataSamplingInterval, 50, \ 3895 "Data sampling interval (in milliseconds)") \ 3896 \ 3897 develop(bool, PerfTraceDataCreation, false, \ 3898 "Trace creation of Performance Data Entries") \ 3899 \ 3900 develop(bool, PerfTraceMemOps, false, \ 3901 "Trace PerfMemory create/attach/detach calls") \ 3902 \ 3903 product(bool, PerfDisableSharedMem, false, \ 3904 "Store performance data in standard memory") \ 3905 \ 3906 product(intx, PerfDataMemorySize, 32*K, \ 3907 "Size of performance data memory region. Will be rounded " \ 3908 "up to a multiple of the native os page size.") \ 3909 \ 3910 product(intx, PerfMaxStringConstLength, 1024, \ 3911 "Maximum PerfStringConstant string length before truncation") \ 3912 \ 3913 product(bool, PerfAllowAtExitRegistration, false, \ 3914 "Allow registration of atexit() methods") \ 3915 \ 3916 product(bool, PerfBypassFileSystemCheck, false, \ 3917 "Bypass Win32 file system criteria checks (Windows Only)") \ 3918 \ 3919 product(intx, UnguardOnExecutionViolation, 0, \ 3920 "Unguard page and retry on no-execute fault (Win32 only) " \ 3921 "0=off, 1=conservative, 2=aggressive") \ 3922 range(0, 2) \ 3923 \ 3924 /* Serviceability Support */ \ 3925 \ 3926 product(bool, ManagementServer, false, \ 3927 "Create JMX Management Server") \ 3928 \ 3929 product(bool, DisableAttachMechanism, false, \ 3930 "Disable mechanism that allows tools to attach to this VM") \ 3931 \ 3932 product(bool, StartAttachListener, false, \ 3933 "Always start Attach Listener at VM startup") \ 3934 \ 3935 manageable(bool, PrintConcurrentLocks, false, \ 3936 "Print java.util.concurrent locks in thread dump") \ 3937 \ 3938 product(bool, TransmitErrorReport, false, \ 3939 "Enable error report transmission on erroneous termination") \ 3940 \ 3941 product(ccstr, ErrorReportServer, NULL, \ 3942 "Override built-in error report server address") \ 3943 \ 3944 /* Shared spaces */ \ 3945 \ 3946 product(bool, UseSharedSpaces, true, \ 3947 "Use shared spaces for metadata") \ 3948 \ 3949 product(bool, VerifySharedSpaces, false, \ 3950 "Verify shared spaces (false for default archive, true for " \ 3951 "archive specified by -XX:SharedArchiveFile)") \ 3952 \ 3953 product(bool, RequireSharedSpaces, false, \ 3954 "Require shared spaces for metadata") \ 3955 \ 3956 product(bool, DumpSharedSpaces, false, \ 3957 "Special mode: JVM reads a class list, loads classes, builds " \ 3958 "shared spaces, and dumps the shared spaces to a file to be " \ 3959 "used in future JVM runs") \ 3960 \ 3961 product(bool, PrintSharedSpaces, false, \ 3962 "Print usage of shared spaces") \ 3963 \ 3964 product(bool, PrintSharedArchiveAndExit, false, \ 3965 "Print shared archive file contents") \ 3966 \ 3967 product(bool, PrintSharedDictionary, false, \ 3968 "If PrintSharedArchiveAndExit is true, also print the shared " \ 3969 "dictionary") \ 3970 \ 3971 product(size_t, SharedReadWriteSize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3972 "Size of read-write space for metadata (in bytes)") \ 3973 \ 3974 product(size_t, SharedReadOnlySize, NOT_LP64(12*M) LP64_ONLY(16*M), \ 3975 "Size of read-only space for metadata (in bytes)") \ 3976 \ 3977 product(uintx, SharedMiscDataSize, NOT_LP64(2*M) LP64_ONLY(4*M), \ 3978 "Size of the shared miscellaneous data area (in bytes)") \ 3979 \ 3980 product(uintx, SharedMiscCodeSize, 120*K, \ 3981 "Size of the shared miscellaneous code area (in bytes)") \ 3982 \ 3983 product(uintx, SharedBaseAddress, LP64_ONLY(32*G) \ 3984 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3985 "Address to allocate shared memory region for class data") \ 3986 \ 3987 product(uintx, SharedSymbolTableBucketSize, 4, \ 3988 "Average number of symbols per bucket in shared table") \ 3989 \ 3990 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 3991 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 3992 "classes. Just exclude them from the shared dictionary.") \ 3993 \ 3994 diagnostic(bool, PrintMethodHandleStubs, false, \ 3995 "Print generated stub code for method handles") \ 3996 \ 3997 develop(bool, TraceMethodHandles, false, \ 3998 "trace internal method handle operations") \ 3999 \ 4000 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4001 "perform extra checks when constructing method handles") \ 4002 \ 4003 diagnostic(bool, ShowHiddenFrames, false, \ 4004 "show method handle implementation frames (usually hidden)") \ 4005 \ 4006 experimental(bool, TrustFinalNonStaticFields, false, \ 4007 "trust final non-static declarations for constant folding") \ 4008 \ 4009 diagnostic(bool, FoldStableValues, true, \ 4010 "Optimize loads from stable fields (marked w/ @Stable)") \ 4011 \ 4012 develop(bool, TraceInvokeDynamic, false, \ 4013 "trace internal invoke dynamic operations") \ 4014 \ 4015 diagnostic(bool, PauseAtStartup, false, \ 4016 "Causes the VM to pause at startup time and wait for the pause " \ 4017 "file to be removed (default: ./vm.paused.<pid>)") \ 4018 \ 4019 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4020 "The file to create and for whose removal to await when pausing " \ 4021 "at startup. (default: ./vm.paused.<pid>)") \ 4022 \ 4023 diagnostic(bool, PauseAtExit, false, \ 4024 "Pause and wait for keypress on exit if a debugger is attached") \ 4025 \ 4026 product(bool, ExtendedDTraceProbes, false, \ 4027 "Enable performance-impacting dtrace probes") \ 4028 \ 4029 product(bool, DTraceMethodProbes, false, \ 4030 "Enable dtrace probes for method-entry and method-exit") \ 4031 \ 4032 product(bool, DTraceAllocProbes, false, \ 4033 "Enable dtrace probes for object allocation") \ 4034 \ 4035 product(bool, DTraceMonitorProbes, false, \ 4036 "Enable dtrace probes for monitor events") \ 4037 \ 4038 product(bool, RelaxAccessControlCheck, false, \ 4039 "Relax the access control checks in the verifier") \ 4040 \ 4041 product(uintx, StringTableSize, defaultStringTableSize, \ 4042 "Number of buckets in the interned String table") \ 4043 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4044 \ 4045 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4046 "Number of buckets in the JVM internal Symbol table") \ 4047 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4048 \ 4049 product(bool, UseStringDeduplication, false, \ 4050 "Use string deduplication") \ 4051 \ 4052 product(bool, PrintStringDeduplicationStatistics, false, \ 4053 "Print string deduplication statistics") \ 4054 \ 4055 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4056 "A string must reach this age (or be promoted to an old region) " \ 4057 "to be considered for deduplication") \ 4058 range(1, markOopDesc::max_age) \ 4059 \ 4060 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4061 "Force table resize every time the table is scanned") \ 4062 \ 4063 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4064 "Force table rehash every time the table is scanned") \ 4065 \ 4066 develop(bool, TraceDefaultMethods, false, \ 4067 "Trace the default method processing steps") \ 4068 \ 4069 develop(bool, VerifyGenericSignatures, false, \ 4070 "Abort VM on erroneous or inconsistent generic signatures") \ 4071 \ 4072 diagnostic(bool, WhiteBoxAPI, false, \ 4073 "Enable internal testing APIs") \ 4074 \ 4075 product(bool, PrintGCCause, true, \ 4076 "Include GC cause in GC logging") \ 4077 \ 4078 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4079 "Default survivor space alignment in bytes") \ 4080 constraint(SurvivorAlignmentInBytesConstraintFunc) \ 4081 \ 4082 product(bool , AllowNonVirtualCalls, false, \ 4083 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4084 \ 4085 product(ccstr, DumpLoadedClassList, NULL, \ 4086 "Dump the names all loaded classes, that could be stored into " \ 4087 "the CDS archive, in the specified file") \ 4088 \ 4089 product(ccstr, SharedClassListFile, NULL, \ 4090 "Override the default CDS class list") \ 4091 \ 4092 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4093 "Override the default location of the CDS archive file") \ 4094 \ 4095 product(ccstr, ExtraSharedClassListFile, NULL, \ 4096 "Extra classlist for building the CDS archive file") \ 4097 \ 4098 experimental(size_t, ArrayAllocatorMallocLimit, \ 4099 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4100 "Allocation less than this value will be allocated " \ 4101 "using malloc. Larger allocations will use mmap.") \ 4102 \ 4103 experimental(bool, AlwaysAtomicAccesses, false, \ 4104 "Accesses to all variables should always be atomic") \ 4105 \ 4106 product(bool, EnableTracing, false, \ 4107 "Enable event-based tracing") \ 4108 \ 4109 product(bool, UseLockedTracing, false, \ 4110 "Use locked-tracing when doing event-based tracing") \ 4111 \ 4112 diagnostic(bool, UseUnalignedAccesses, false, \ 4113 "Use unaligned memory accesses in sun.misc.Unsafe") \ 4114 \ 4115 product_pd(bool, PreserveFramePointer, \ 4116 "Use the FP register for holding the frame pointer " \ 4117 "and not as a general purpose register.") 4118 4119/* 4120 * Macros for factoring of globals 4121 */ 4122 4123// Interface macros 4124#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4125#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4126#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4127#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4128#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4129#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4130#ifdef PRODUCT 4131#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type CONST_##name; const type name = value; 4132#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type CONST_##name; const type name = pd_##name; 4133#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type CONST_##name; 4134#else 4135#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4136#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4137#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4138#endif // PRODUCT 4139// Special LP64 flags, product only needed for now. 4140#ifdef _LP64 4141#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4142#else 4143#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4144#endif // _LP64 4145 4146// Implementation macros 4147#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4148#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4149#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4150#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4151#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4152#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4153#ifdef PRODUCT 4154#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type CONST_##name = value; 4155#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type CONST_##name = pd_##name; 4156#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type CONST_##name = value; 4157#else 4158#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4159#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4160#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4161#endif // PRODUCT 4162#ifdef _LP64 4163#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4164#else 4165#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4166#endif // _LP64 4167 4168// Only materialize src code for range checking when required, ignore otherwise 4169#define IGNORE_RANGE(a, b) 4170// Only materialize src code for contraint checking when required, ignore otherwise 4171#define IGNORE_CONSTRAINT(func) 4172 4173RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4174 DECLARE_PD_DEVELOPER_FLAG, \ 4175 DECLARE_PRODUCT_FLAG, \ 4176 DECLARE_PD_PRODUCT_FLAG, \ 4177 DECLARE_DIAGNOSTIC_FLAG, \ 4178 DECLARE_EXPERIMENTAL_FLAG, \ 4179 DECLARE_NOTPRODUCT_FLAG, \ 4180 DECLARE_MANAGEABLE_FLAG, \ 4181 DECLARE_PRODUCT_RW_FLAG, \ 4182 DECLARE_LP64_PRODUCT_FLAG, \ 4183 IGNORE_RANGE, \ 4184 IGNORE_CONSTRAINT) 4185 4186RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4187 DECLARE_PD_DEVELOPER_FLAG, \ 4188 DECLARE_PRODUCT_FLAG, \ 4189 DECLARE_PD_PRODUCT_FLAG, \ 4190 DECLARE_DIAGNOSTIC_FLAG, \ 4191 DECLARE_NOTPRODUCT_FLAG, \ 4192 IGNORE_RANGE, \ 4193 IGNORE_CONSTRAINT) 4194 4195ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4196 DECLARE_PRODUCT_FLAG, \ 4197 DECLARE_DIAGNOSTIC_FLAG, \ 4198 DECLARE_EXPERIMENTAL_FLAG, \ 4199 DECLARE_NOTPRODUCT_FLAG, \ 4200 IGNORE_RANGE, \ 4201 IGNORE_CONSTRAINT) 4202 4203// Extensions 4204 4205#include "runtime/globals_ext.hpp" 4206 4207#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4208