globals.hpp revision 10722:a8447b111060
1260684Skaiw/* 2260684Skaiw * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3276371Semaste * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4260684Skaiw * 5260684Skaiw * This code is free software; you can redistribute it and/or modify it 6260684Skaiw * under the terms of the GNU General Public License version 2 only, as 7260684Skaiw * published by the Free Software Foundation. 8260684Skaiw * 9260684Skaiw * This code is distributed in the hope that it will be useful, but WITHOUT 10260684Skaiw * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11260684Skaiw * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12260684Skaiw * version 2 for more details (a copy is included in the LICENSE file that 13260684Skaiw * accompanied this code). 14260684Skaiw * 15260684Skaiw * You should have received a copy of the GNU General Public License version 16260684Skaiw * 2 along with this work; if not, write to the Free Software Foundation, 17260684Skaiw * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18260684Skaiw * 19260684Skaiw * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20260684Skaiw * or visit www.oracle.com if you need additional information or have any 21260684Skaiw * questions. 22260684Skaiw * 23260684Skaiw */ 24260684Skaiw 25260684Skaiw#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP 26260684Skaiw#define SHARE_VM_RUNTIME_GLOBALS_HPP 27276371Semaste 28260684Skaiw#include "utilities/debug.hpp" 29260684Skaiw#include <float.h> // for DBL_MAX 30260684Skaiw 31260684Skaiw// use this for flags that are true per default in the tiered build 32260684Skaiw// but false in non-tiered builds, and vice versa 33260684Skaiw#ifdef TIERED 34260684Skaiw#define trueInTiered true 35260684Skaiw#define falseInTiered false 36260684Skaiw#else 37260684Skaiw#define trueInTiered false 38260684Skaiw#define falseInTiered true 39260684Skaiw#endif 40260684Skaiw 41260684Skaiw#ifdef TARGET_ARCH_x86 42260684Skaiw# include "globals_x86.hpp" 43260684Skaiw#endif 44260684Skaiw#ifdef TARGET_ARCH_sparc 45260684Skaiw# include "globals_sparc.hpp" 46260684Skaiw#endif 47260684Skaiw#ifdef TARGET_ARCH_zero 48260684Skaiw# include "globals_zero.hpp" 49260684Skaiw#endif 50260684Skaiw#ifdef TARGET_ARCH_arm 51260684Skaiw# include "globals_arm.hpp" 52260684Skaiw#endif 53260684Skaiw#ifdef TARGET_ARCH_ppc 54260684Skaiw# include "globals_ppc.hpp" 55260684Skaiw#endif 56260684Skaiw#ifdef TARGET_ARCH_aarch64 57260684Skaiw# include "globals_aarch64.hpp" 58260684Skaiw#endif 59260684Skaiw#ifdef TARGET_OS_FAMILY_linux 60260684Skaiw# include "globals_linux.hpp" 61260684Skaiw#endif 62260684Skaiw#ifdef TARGET_OS_FAMILY_solaris 63260684Skaiw# include "globals_solaris.hpp" 64260684Skaiw#endif 65260684Skaiw#ifdef TARGET_OS_FAMILY_windows 66260684Skaiw# include "globals_windows.hpp" 67260684Skaiw#endif 68260684Skaiw#ifdef TARGET_OS_FAMILY_aix 69260684Skaiw# include "globals_aix.hpp" 70260684Skaiw#endif 71260684Skaiw#ifdef TARGET_OS_FAMILY_bsd 72260684Skaiw# include "globals_bsd.hpp" 73260684Skaiw#endif 74260684Skaiw#ifdef TARGET_OS_ARCH_linux_x86 75260684Skaiw# include "globals_linux_x86.hpp" 76260684Skaiw#endif 77260684Skaiw#ifdef TARGET_OS_ARCH_linux_sparc 78260684Skaiw# include "globals_linux_sparc.hpp" 79260684Skaiw#endif 80260684Skaiw#ifdef TARGET_OS_ARCH_linux_zero 81260684Skaiw# include "globals_linux_zero.hpp" 82260684Skaiw#endif 83260684Skaiw#ifdef TARGET_OS_ARCH_solaris_x86 84260684Skaiw# include "globals_solaris_x86.hpp" 85260684Skaiw#endif 86260684Skaiw#ifdef TARGET_OS_ARCH_solaris_sparc 87260684Skaiw# include "globals_solaris_sparc.hpp" 88260684Skaiw#endif 89260684Skaiw#ifdef TARGET_OS_ARCH_windows_x86 90260684Skaiw# include "globals_windows_x86.hpp" 91260684Skaiw#endif 92260684Skaiw#ifdef TARGET_OS_ARCH_linux_arm 93260684Skaiw# include "globals_linux_arm.hpp" 94260684Skaiw#endif 95260684Skaiw#ifdef TARGET_OS_ARCH_linux_ppc 96260684Skaiw# include "globals_linux_ppc.hpp" 97260684Skaiw#endif 98260684Skaiw#ifdef TARGET_OS_ARCH_linux_aarch64 99260684Skaiw# include "globals_linux_aarch64.hpp" 100260684Skaiw#endif 101260684Skaiw#ifdef TARGET_OS_ARCH_aix_ppc 102260684Skaiw# include "globals_aix_ppc.hpp" 103260684Skaiw#endif 104260684Skaiw#ifdef TARGET_OS_ARCH_bsd_x86 105260684Skaiw# include "globals_bsd_x86.hpp" 106260684Skaiw#endif 107260684Skaiw#ifdef TARGET_OS_ARCH_bsd_zero 108260684Skaiw# include "globals_bsd_zero.hpp" 109260684Skaiw#endif 110260684Skaiw#ifdef COMPILER1 111260684Skaiw#ifdef TARGET_ARCH_x86 112260684Skaiw# include "c1_globals_x86.hpp" 113260684Skaiw#endif 114260684Skaiw#ifdef TARGET_ARCH_sparc 115260684Skaiw# include "c1_globals_sparc.hpp" 116260684Skaiw#endif 117260684Skaiw#ifdef TARGET_ARCH_arm 118260684Skaiw# include "c1_globals_arm.hpp" 119260684Skaiw#endif 120260684Skaiw#ifdef TARGET_ARCH_aarch64 121260684Skaiw# include "c1_globals_aarch64.hpp" 122260684Skaiw#endif 123260684Skaiw#ifdef TARGET_OS_FAMILY_linux 124260684Skaiw# include "c1_globals_linux.hpp" 125260684Skaiw#endif 126260684Skaiw#ifdef TARGET_OS_FAMILY_solaris 127260684Skaiw# include "c1_globals_solaris.hpp" 128260684Skaiw#endif 129260684Skaiw#ifdef TARGET_OS_FAMILY_windows 130260684Skaiw# include "c1_globals_windows.hpp" 131260684Skaiw#endif 132260684Skaiw#ifdef TARGET_OS_FAMILY_aix 133260684Skaiw# include "c1_globals_aix.hpp" 134260684Skaiw#endif 135260684Skaiw#ifdef TARGET_OS_FAMILY_bsd 136260684Skaiw# include "c1_globals_bsd.hpp" 137260684Skaiw#endif 138260684Skaiw#ifdef TARGET_ARCH_ppc 139260684Skaiw# include "c1_globals_ppc.hpp" 140260684Skaiw#endif 141260684Skaiw#endif 142260684Skaiw#ifdef COMPILER2 143260684Skaiw#ifdef TARGET_ARCH_x86 144260684Skaiw# include "c2_globals_x86.hpp" 145260684Skaiw#endif 146260684Skaiw#ifdef TARGET_ARCH_sparc 147260684Skaiw# include "c2_globals_sparc.hpp" 148260684Skaiw#endif 149260684Skaiw#ifdef TARGET_ARCH_arm 150260684Skaiw# include "c2_globals_arm.hpp" 151260684Skaiw#endif 152260684Skaiw#ifdef TARGET_ARCH_ppc 153260684Skaiw# include "c2_globals_ppc.hpp" 154260684Skaiw#endif 155260684Skaiw#ifdef TARGET_ARCH_aarch64 156260684Skaiw# include "c2_globals_aarch64.hpp" 157260684Skaiw#endif 158260684Skaiw#ifdef TARGET_OS_FAMILY_linux 159260684Skaiw# include "c2_globals_linux.hpp" 160260684Skaiw#endif 161260684Skaiw#ifdef TARGET_OS_FAMILY_solaris 162260684Skaiw# include "c2_globals_solaris.hpp" 163260684Skaiw#endif 164260684Skaiw#ifdef TARGET_OS_FAMILY_windows 165260684Skaiw# include "c2_globals_windows.hpp" 166260684Skaiw#endif 167260684Skaiw#ifdef TARGET_OS_FAMILY_aix 168260684Skaiw# include "c2_globals_aix.hpp" 169260684Skaiw#endif 170260684Skaiw#ifdef TARGET_OS_FAMILY_bsd 171260684Skaiw# include "c2_globals_bsd.hpp" 172260684Skaiw#endif 173260684Skaiw#endif 174260684Skaiw#ifdef SHARK 175260684Skaiw#ifdef TARGET_ARCH_zero 176260684Skaiw# include "shark_globals_zero.hpp" 177260684Skaiw#endif 178260684Skaiw#endif 179260684Skaiw 180260684Skaiw#if !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK) && !INCLUDE_JVMCI 181260684Skaiwdefine_pd_global(bool, BackgroundCompilation, false); 182260684Skaiwdefine_pd_global(bool, UseTLAB, false); 183260684Skaiwdefine_pd_global(bool, CICompileOSR, false); 184260684Skaiwdefine_pd_global(bool, UseTypeProfile, false); 185260684Skaiwdefine_pd_global(bool, UseOnStackReplacement, false); 186260684Skaiwdefine_pd_global(bool, InlineIntrinsics, false); 187260684Skaiwdefine_pd_global(bool, PreferInterpreterNativeStubs, true); 188260684Skaiwdefine_pd_global(bool, ProfileInterpreter, false); 189260684Skaiwdefine_pd_global(bool, ProfileTraps, false); 190260684Skaiwdefine_pd_global(bool, TieredCompilation, false); 191260684Skaiw 192260684Skaiwdefine_pd_global(intx, CompileThreshold, 0); 193260684Skaiw 194260684Skaiwdefine_pd_global(intx, OnStackReplacePercentage, 0); 195260684Skaiwdefine_pd_global(bool, ResizeTLAB, false); 196260684Skaiwdefine_pd_global(intx, FreqInlineSize, 0); 197260684Skaiwdefine_pd_global(size_t, NewSizeThreadIncrease, 4*K); 198260684Skaiwdefine_pd_global(intx, InlineClassNatives, true); 199260684Skaiwdefine_pd_global(intx, InlineUnsafeOps, true); 200260684Skaiwdefine_pd_global(intx, InitialCodeCacheSize, 160*K); 201260684Skaiwdefine_pd_global(intx, ReservedCodeCacheSize, 32*M); 202260684Skaiwdefine_pd_global(intx, NonProfiledCodeHeapSize, 0); 203260684Skaiwdefine_pd_global(intx, ProfiledCodeHeapSize, 0); 204260684Skaiwdefine_pd_global(intx, NonNMethodCodeHeapSize, 32*M); 205260684Skaiw 206260684Skaiwdefine_pd_global(intx, CodeCacheExpansionSize, 32*K); 207260684Skaiwdefine_pd_global(intx, CodeCacheMinBlockLength, 1); 208260684Skaiwdefine_pd_global(intx, CodeCacheMinimumUseSpace, 200*K); 209260684Skaiwdefine_pd_global(size_t, MetaspaceSize, ScaleForWordSize(4*M)); 210260684Skaiwdefine_pd_global(bool, NeverActAsServerClassMachine, true); 211260684Skaiwdefine_pd_global(uint64_t,MaxRAM, 1ULL*G); 212260684Skaiw#define CI_COMPILER_COUNT 0 213260684Skaiw#else 214260684Skaiw 215260684Skaiw#if defined(COMPILER2) || INCLUDE_JVMCI 216260684Skaiw#define CI_COMPILER_COUNT 2 217260684Skaiw#else 218260684Skaiw#define CI_COMPILER_COUNT 1 219260684Skaiw#endif // COMPILER2 || INCLUDE_JVMCI 220260684Skaiw 221260684Skaiw#endif // no compilers 222260684Skaiw 223260684Skaiw// string type aliases used only in this file 224260684Skaiwtypedef const char* ccstr; 225260684Skaiwtypedef const char* ccstrlist; // represents string arguments which accumulate 226260684Skaiw 227260684Skaiw// function type that will construct default range string 228260684Skaiwtypedef const char* (*RangeStrFunc)(void); 229260684Skaiw 230260684Skaiwstruct Flag { 231260684Skaiw enum Flags { 232260684Skaiw // value origin 233260684Skaiw DEFAULT = 0, 234260684Skaiw COMMAND_LINE = 1, 235260684Skaiw ENVIRON_VAR = 2, 236260684Skaiw CONFIG_FILE = 3, 237260684Skaiw MANAGEMENT = 4, 238260684Skaiw ERGONOMIC = 5, 239260684Skaiw ATTACH_ON_DEMAND = 6, 240260684Skaiw INTERNAL = 7, 241260684Skaiw 242260684Skaiw LAST_VALUE_ORIGIN = INTERNAL, 243260684Skaiw VALUE_ORIGIN_BITS = 4, 244260684Skaiw VALUE_ORIGIN_MASK = right_n_bits(VALUE_ORIGIN_BITS), 245260684Skaiw 246260684Skaiw // flag kind 247260684Skaiw KIND_PRODUCT = 1 << 4, 248260684Skaiw KIND_MANAGEABLE = 1 << 5, 249260684Skaiw KIND_DIAGNOSTIC = 1 << 6, 250260684Skaiw KIND_EXPERIMENTAL = 1 << 7, 251260684Skaiw KIND_NOT_PRODUCT = 1 << 8, 252260684Skaiw KIND_DEVELOP = 1 << 9, 253260684Skaiw KIND_PLATFORM_DEPENDENT = 1 << 10, 254260684Skaiw KIND_READ_WRITE = 1 << 11, 255260684Skaiw KIND_C1 = 1 << 12, 256260684Skaiw KIND_C2 = 1 << 13, 257260684Skaiw KIND_ARCH = 1 << 14, 258260684Skaiw KIND_SHARK = 1 << 15, 259260684Skaiw KIND_LP64_PRODUCT = 1 << 16, 260260684Skaiw KIND_COMMERCIAL = 1 << 17, 261260684Skaiw KIND_JVMCI = 1 << 18, 262260684Skaiw 263260684Skaiw KIND_MASK = ~VALUE_ORIGIN_MASK 264260684Skaiw }; 265260684Skaiw 266260684Skaiw enum Error { 267260684Skaiw // no error 268260684Skaiw SUCCESS = 0, 269260684Skaiw // flag name is missing 270260684Skaiw MISSING_NAME, 271260684Skaiw // flag value is missing 272260684Skaiw MISSING_VALUE, 273260684Skaiw // error parsing the textual form of the value 274260684Skaiw WRONG_FORMAT, 275260684Skaiw // flag is not writeable 276260684Skaiw NON_WRITABLE, 277260684Skaiw // flag value is outside of its bounds 278260684Skaiw OUT_OF_BOUNDS, 279260684Skaiw // flag value violates its constraint 280260684Skaiw VIOLATES_CONSTRAINT, 281260684Skaiw // there is no flag with the given name 282260684Skaiw INVALID_FLAG, 283260684Skaiw // other, unspecified error related to setting the flag 284260684Skaiw ERR_OTHER 285260684Skaiw }; 286260684Skaiw 287260684Skaiw enum MsgType { 288260684Skaiw NONE = 0, 289260684Skaiw DIAGNOSTIC_FLAG_BUT_LOCKED, 290260684Skaiw EXPERIMENTAL_FLAG_BUT_LOCKED, 291260684Skaiw DEVELOPER_FLAG_BUT_PRODUCT_BUILD, 292260684Skaiw NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD 293260684Skaiw }; 294260684Skaiw 295260684Skaiw const char* _type; 296260684Skaiw const char* _name; 297260684Skaiw void* _addr; 298260684Skaiw NOT_PRODUCT(const char* _doc;) 299260684Skaiw Flags _flags; 300260684Skaiw 301260684Skaiw // points to all Flags static array 302260684Skaiw static Flag* flags; 303260684Skaiw 304260684Skaiw // number of flags 305260684Skaiw static size_t numFlags; 306260684Skaiw 307260684Skaiw static Flag* find_flag(const char* name) { return find_flag(name, strlen(name), true, true); }; 308260684Skaiw static Flag* find_flag(const char* name, size_t length, bool allow_locked = false, bool return_flag = false); 309260684Skaiw static Flag* fuzzy_match(const char* name, size_t length, bool allow_locked = false); 310260684Skaiw 311260684Skaiw static const char* get_int_default_range_str(); 312260684Skaiw static const char* get_uint_default_range_str(); 313260684Skaiw static const char* get_intx_default_range_str(); 314260684Skaiw static const char* get_uintx_default_range_str(); 315260684Skaiw static const char* get_uint64_t_default_range_str(); 316260684Skaiw static const char* get_size_t_default_range_str(); 317260684Skaiw static const char* get_double_default_range_str(); 318260684Skaiw 319260684Skaiw void check_writable(); 320260684Skaiw 321260684Skaiw bool is_bool() const; 322260684Skaiw bool get_bool() const; 323260684Skaiw void set_bool(bool value); 324260684Skaiw 325260684Skaiw bool is_int() const; 326260684Skaiw int get_int() const; 327260684Skaiw void set_int(int value); 328260684Skaiw 329260684Skaiw bool is_uint() const; 330260684Skaiw uint get_uint() const; 331260684Skaiw void set_uint(uint value); 332260684Skaiw 333260684Skaiw bool is_intx() const; 334260684Skaiw intx get_intx() const; 335260684Skaiw void set_intx(intx value); 336260684Skaiw 337260684Skaiw bool is_uintx() const; 338260684Skaiw uintx get_uintx() const; 339260684Skaiw void set_uintx(uintx value); 340260684Skaiw 341260684Skaiw bool is_uint64_t() const; 342260684Skaiw uint64_t get_uint64_t() const; 343260684Skaiw void set_uint64_t(uint64_t value); 344260684Skaiw 345260684Skaiw bool is_size_t() const; 346260684Skaiw size_t get_size_t() const; 347260684Skaiw void set_size_t(size_t value); 348260684Skaiw 349260684Skaiw bool is_double() const; 350260684Skaiw double get_double() const; 351260684Skaiw void set_double(double value); 352260684Skaiw 353260684Skaiw bool is_ccstr() const; 354260684Skaiw bool ccstr_accumulates() const; 355260684Skaiw ccstr get_ccstr() const; 356260684Skaiw void set_ccstr(ccstr value); 357260684Skaiw 358260684Skaiw Flags get_origin(); 359260684Skaiw void set_origin(Flags origin); 360260684Skaiw 361260684Skaiw bool is_default(); 362260684Skaiw bool is_ergonomic(); 363260684Skaiw bool is_command_line(); 364260684Skaiw 365260684Skaiw bool is_product() const; 366260684Skaiw bool is_manageable() const; 367260684Skaiw bool is_diagnostic() const; 368260684Skaiw bool is_experimental() const; 369260684Skaiw bool is_notproduct() const; 370260684Skaiw bool is_develop() const; 371260684Skaiw bool is_read_write() const; 372260684Skaiw bool is_commercial() const; 373260684Skaiw 374260684Skaiw bool is_constant_in_binary() const; 375260684Skaiw 376260684Skaiw bool is_unlocker() const; 377260684Skaiw bool is_unlocked() const; 378260684Skaiw bool is_writeable() const; 379260684Skaiw bool is_external() const; 380260684Skaiw 381260684Skaiw bool is_unlocker_ext() const; 382260684Skaiw bool is_unlocked_ext() const; 383260684Skaiw bool is_writeable_ext() const; 384260684Skaiw bool is_external_ext() const; 385260684Skaiw 386260684Skaiw void unlock_diagnostic(); 387260684Skaiw 388260684Skaiw Flag::MsgType get_locked_message(char*, int) const; 389260684Skaiw void get_locked_message_ext(char*, int) const; 390260684Skaiw 391260684Skaiw // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 392260684Skaiw void print_on(outputStream* st, bool withComments = false, bool printRanges = false); 393260684Skaiw void print_kind(outputStream* st); 394260684Skaiw void print_as_flag(outputStream* st); 395260684Skaiw 396260684Skaiw static const char* flag_error_str(Flag::Error error); 397260684Skaiw}; 398260684Skaiw 399260684Skaiw// debug flags control various aspects of the VM and are global accessible 400260684Skaiw 401260684Skaiw// use FlagSetting to temporarily change some debug flag 402260684Skaiw// e.g. FlagSetting fs(DebugThisAndThat, true); 403260684Skaiw// restored to previous value upon leaving scope 404260684Skaiwclass FlagSetting { 405260684Skaiw bool val; 406260684Skaiw bool* flag; 407260684Skaiw public: 408260684Skaiw FlagSetting(bool& fl, bool newValue) { flag = &fl; val = fl; fl = newValue; } 409260684Skaiw ~FlagSetting() { *flag = val; } 410260684Skaiw}; 411260684Skaiw 412260684Skaiw 413260684Skaiwclass CounterSetting { 414260684Skaiw intx* counter; 415260684Skaiw public: 416260684Skaiw CounterSetting(intx* cnt) { counter = cnt; (*counter)++; } 417260684Skaiw ~CounterSetting() { (*counter)--; } 418260684Skaiw}; 419260684Skaiw 420260684Skaiwclass IntFlagSetting { 421260684Skaiw int val; 422260684Skaiw int* flag; 423260684Skaiw public: 424260684Skaiw IntFlagSetting(int& fl, int newValue) { flag = &fl; val = fl; fl = newValue; } 425260684Skaiw ~IntFlagSetting() { *flag = val; } 426260684Skaiw}; 427260684Skaiw 428260684Skaiwclass UIntFlagSetting { 429260684Skaiw uint val; 430260684Skaiw uint* flag; 431260684Skaiw public: 432260684Skaiw UIntFlagSetting(uint& fl, uint newValue) { flag = &fl; val = fl; fl = newValue; } 433260684Skaiw ~UIntFlagSetting() { *flag = val; } 434260684Skaiw}; 435260684Skaiw 436260684Skaiwclass UIntXFlagSetting { 437260684Skaiw uintx val; 438260684Skaiw uintx* flag; 439260684Skaiw public: 440260684Skaiw UIntXFlagSetting(uintx& fl, uintx newValue) { flag = &fl; val = fl; fl = newValue; } 441260684Skaiw ~UIntXFlagSetting() { *flag = val; } 442260684Skaiw}; 443260684Skaiw 444260684Skaiwclass DoubleFlagSetting { 445260684Skaiw double val; 446260684Skaiw double* flag; 447260684Skaiw public: 448260684Skaiw DoubleFlagSetting(double& fl, double newValue) { flag = &fl; val = fl; fl = newValue; } 449260684Skaiw ~DoubleFlagSetting() { *flag = val; } 450260684Skaiw}; 451260684Skaiw 452260684Skaiwclass SizeTFlagSetting { 453260684Skaiw size_t val; 454260684Skaiw size_t* flag; 455260684Skaiw public: 456260684Skaiw SizeTFlagSetting(size_t& fl, size_t newValue) { flag = &fl; val = fl; fl = newValue; } 457260684Skaiw ~SizeTFlagSetting() { *flag = val; } 458260684Skaiw}; 459260684Skaiw 460260684Skaiw 461260684Skaiwclass CommandLineFlags { 462260684Skaiwpublic: 463260684Skaiw static Flag::Error boolAt(const char* name, size_t len, bool* value, bool allow_locked = false, bool return_flag = false); 464260684Skaiw 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); } 465260684Skaiw static Flag::Error boolAtPut(Flag* flag, bool* value, Flag::Flags origin); 466260684Skaiw static Flag::Error boolAtPut(const char* name, size_t len, bool* value, Flag::Flags origin); 467260684Skaiw static Flag::Error boolAtPut(const char* name, bool* value, Flag::Flags origin) { return boolAtPut(name, strlen(name), value, origin); } 468260684Skaiw 469260684Skaiw static Flag::Error intAt(const char* name, size_t len, int* value, bool allow_locked = false, bool return_flag = false); 470260684Skaiw 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); } 471260684Skaiw static Flag::Error intAtPut(Flag* flag, int* value, Flag::Flags origin); 472260684Skaiw static Flag::Error intAtPut(const char* name, size_t len, int* value, Flag::Flags origin); 473260684Skaiw static Flag::Error intAtPut(const char* name, int* value, Flag::Flags origin) { return intAtPut(name, strlen(name), value, origin); } 474260684Skaiw 475260684Skaiw static Flag::Error uintAt(const char* name, size_t len, uint* value, bool allow_locked = false, bool return_flag = false); 476260684Skaiw 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); } 477260684Skaiw static Flag::Error uintAtPut(Flag* flag, uint* value, Flag::Flags origin); 478260684Skaiw static Flag::Error uintAtPut(const char* name, size_t len, uint* value, Flag::Flags origin); 479260684Skaiw static Flag::Error uintAtPut(const char* name, uint* value, Flag::Flags origin) { return uintAtPut(name, strlen(name), value, origin); } 480260684Skaiw 481260684Skaiw static Flag::Error intxAt(const char* name, size_t len, intx* value, bool allow_locked = false, bool return_flag = false); 482260684Skaiw 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); } 483260684Skaiw static Flag::Error intxAtPut(Flag* flag, intx* value, Flag::Flags origin); 484260684Skaiw static Flag::Error intxAtPut(const char* name, size_t len, intx* value, Flag::Flags origin); 485260684Skaiw static Flag::Error intxAtPut(const char* name, intx* value, Flag::Flags origin) { return intxAtPut(name, strlen(name), value, origin); } 486260684Skaiw 487260684Skaiw static Flag::Error uintxAt(const char* name, size_t len, uintx* value, bool allow_locked = false, bool return_flag = false); 488260684Skaiw 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); } 489260684Skaiw static Flag::Error uintxAtPut(Flag* flag, uintx* value, Flag::Flags origin); 490260684Skaiw static Flag::Error uintxAtPut(const char* name, size_t len, uintx* value, Flag::Flags origin); 491260684Skaiw static Flag::Error uintxAtPut(const char* name, uintx* value, Flag::Flags origin) { return uintxAtPut(name, strlen(name), value, origin); } 492260684Skaiw 493260684Skaiw static Flag::Error size_tAt(const char* name, size_t len, size_t* value, bool allow_locked = false, bool return_flag = false); 494260684Skaiw 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); } 495260684Skaiw static Flag::Error size_tAtPut(Flag* flag, size_t* value, Flag::Flags origin); 496260684Skaiw static Flag::Error size_tAtPut(const char* name, size_t len, size_t* value, Flag::Flags origin); 497260684Skaiw static Flag::Error size_tAtPut(const char* name, size_t* value, Flag::Flags origin) { return size_tAtPut(name, strlen(name), value, origin); } 498260684Skaiw 499260684Skaiw static Flag::Error uint64_tAt(const char* name, size_t len, uint64_t* value, bool allow_locked = false, bool return_flag = false); 500260684Skaiw 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); } 501260684Skaiw static Flag::Error uint64_tAtPut(Flag* flag, uint64_t* value, Flag::Flags origin); 502260684Skaiw static Flag::Error uint64_tAtPut(const char* name, size_t len, uint64_t* value, Flag::Flags origin); 503260684Skaiw static Flag::Error uint64_tAtPut(const char* name, uint64_t* value, Flag::Flags origin) { return uint64_tAtPut(name, strlen(name), value, origin); } 504260684Skaiw 505260684Skaiw static Flag::Error doubleAt(const char* name, size_t len, double* value, bool allow_locked = false, bool return_flag = false); 506260684Skaiw 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); } 507260684Skaiw static Flag::Error doubleAtPut(Flag* flag, double* value, Flag::Flags origin); 508260684Skaiw static Flag::Error doubleAtPut(const char* name, size_t len, double* value, Flag::Flags origin); 509260684Skaiw static Flag::Error doubleAtPut(const char* name, double* value, Flag::Flags origin) { return doubleAtPut(name, strlen(name), value, origin); } 510260684Skaiw 511260684Skaiw static Flag::Error ccstrAt(const char* name, size_t len, ccstr* value, bool allow_locked = false, bool return_flag = false); 512260684Skaiw 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); } 513260684Skaiw // Contract: Flag will make private copy of the incoming value. 514260684Skaiw // Outgoing value is always malloc-ed, and caller MUST call free. 515260684Skaiw static Flag::Error ccstrAtPut(const char* name, size_t len, ccstr* value, Flag::Flags origin); 516260684Skaiw static Flag::Error ccstrAtPut(const char* name, ccstr* value, Flag::Flags origin) { return ccstrAtPut(name, strlen(name), value, origin); } 517260684Skaiw 518260684Skaiw // Returns false if name is not a command line flag. 519260684Skaiw static bool wasSetOnCmdline(const char* name, bool* value); 520276371Semaste static void printSetFlags(outputStream* out); 521260684Skaiw 522260684Skaiw // printRanges will print out flags type, name and range values as expected by -XX:+PrintFlagsRanges 523260684Skaiw static void printFlags(outputStream* out, bool withComments, bool printRanges = false); 524260684Skaiw 525260684Skaiw static void verify() PRODUCT_RETURN; 526260684Skaiw}; 527260684Skaiw 528260684Skaiw// use this for flags that are true by default in the debug version but 529260684Skaiw// false in the optimized version, and vice versa 530260684Skaiw#ifdef ASSERT 531260684Skaiw#define trueInDebug true 532260684Skaiw#define falseInDebug false 533260684Skaiw#else 534260684Skaiw#define trueInDebug false 535260684Skaiw#define falseInDebug true 536260684Skaiw#endif 537260684Skaiw 538260684Skaiw// use this for flags that are true per default in the product build 539260684Skaiw// but false in development builds, and vice versa 540260684Skaiw#ifdef PRODUCT 541260684Skaiw#define trueInProduct true 542260684Skaiw#define falseInProduct false 543260684Skaiw#else 544260684Skaiw#define trueInProduct false 545260684Skaiw#define falseInProduct true 546260684Skaiw#endif 547260684Skaiw 548260684Skaiw#ifdef JAVASE_EMBEDDED 549260684Skaiw#define falseInEmbedded false 550260684Skaiw#else 551260684Skaiw#define falseInEmbedded true 552260684Skaiw#endif 553260684Skaiw 554260684Skaiw// develop flags are settable / visible only during development and are constant in the PRODUCT version 555260684Skaiw// product flags are always settable / visible 556260684Skaiw// notproduct flags are settable / visible only during development and are not declared in the PRODUCT version 557260684Skaiw 558260684Skaiw// A flag must be declared with one of the following types: 559260684Skaiw// bool, int, uint, intx, uintx, size_t, ccstr, double, or uint64_t. 560260684Skaiw// The type "ccstr" is an alias for "const char*" and is used 561260684Skaiw// only in this file, because the macrology requires single-token type names. 562260684Skaiw 563260684Skaiw// Note: Diagnostic options not meant for VM tuning or for product modes. 564260684Skaiw// They are to be used for VM quality assurance or field diagnosis 565260684Skaiw// of VM bugs. They are hidden so that users will not be encouraged to 566260684Skaiw// try them as if they were VM ordinary execution options. However, they 567260684Skaiw// are available in the product version of the VM. Under instruction 568260684Skaiw// from support engineers, VM customers can turn them on to collect 569260684Skaiw// diagnostic information about VM problems. To use a VM diagnostic 570260684Skaiw// option, you must first specify +UnlockDiagnosticVMOptions. 571260684Skaiw// (This master switch also affects the behavior of -Xprintflags.) 572260684Skaiw// 573260684Skaiw// experimental flags are in support of features that are not 574260684Skaiw// part of the officially supported product, but are available 575260684Skaiw// for experimenting with. They could, for example, be performance 576260684Skaiw// features that may not have undergone full or rigorous QA, but which may 577260684Skaiw// help performance in some cases and released for experimentation 578260684Skaiw// by the community of users and developers. This flag also allows one to 579260684Skaiw// be able to build a fully supported product that nonetheless also 580260684Skaiw// ships with some unsupported, lightly tested, experimental features. 581260684Skaiw// Like the UnlockDiagnosticVMOptions flag above, there is a corresponding 582260684Skaiw// UnlockExperimentalVMOptions flag, which allows the control and 583260684Skaiw// modification of the experimental flags. 584260684Skaiw// 585260684Skaiw// Nota bene: neither diagnostic nor experimental options should be used casually, 586260684Skaiw// and they are not supported on production loads, except under explicit 587260684Skaiw// direction from support engineers. 588260684Skaiw// 589260684Skaiw// manageable flags are writeable external product flags. 590260684Skaiw// They are dynamically writeable through the JDK management interface 591260684Skaiw// (com.sun.management.HotSpotDiagnosticMXBean API) and also through JConsole. 592260684Skaiw// These flags are external exported interface (see CCC). The list of 593260684Skaiw// manageable flags can be queried programmatically through the management 594260684Skaiw// interface. 595260684Skaiw// 596260684Skaiw// A flag can be made as "manageable" only if 597260684Skaiw// - the flag is defined in a CCC as an external exported interface. 598260684Skaiw// - the VM implementation supports dynamic setting of the flag. 599260684Skaiw// This implies that the VM must *always* query the flag variable 600260684Skaiw// and not reuse state related to the flag state at any given time. 601260684Skaiw// - you want the flag to be queried programmatically by the customers. 602260684Skaiw// 603260684Skaiw// product_rw flags are writeable internal product flags. 604260684Skaiw// They are like "manageable" flags but for internal/private use. 605260684Skaiw// The list of product_rw flags are internal/private flags which 606260684Skaiw// may be changed/removed in a future release. It can be set 607260684Skaiw// through the management interface to get/set value 608260684Skaiw// when the name of flag is supplied. 609260684Skaiw// 610260684Skaiw// A flag can be made as "product_rw" only if 611260684Skaiw// - the VM implementation supports dynamic setting of the flag. 612260684Skaiw// This implies that the VM must *always* query the flag variable 613260684Skaiw// and not reuse state related to the flag state at any given time. 614260684Skaiw// 615260684Skaiw// Note that when there is a need to support develop flags to be writeable, 616260684Skaiw// it can be done in the same way as product_rw. 617260684Skaiw// 618260684Skaiw// range is a macro that will expand to min and max arguments for range 619260684Skaiw// checking code if provided - see commandLineFlagRangeList.hpp 620260684Skaiw// 621260684Skaiw// constraint is a macro that will expand to custom function call 622260684Skaiw// for constraint checking if provided - see commandLineFlagConstraintList.hpp 623260684Skaiw// 624260684Skaiw 625260684Skaiw#define RUNTIME_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, lp64_product, range, constraint) \ 626260684Skaiw \ 627260684Skaiw lp64_product(bool, UseCompressedOops, false, \ 628276371Semaste "Use 32-bit object references in 64-bit VM. " \ 629276371Semaste "lp64_product means flag is always constant in 32 bit VM") \ 630276371Semaste \ 631260684Skaiw lp64_product(bool, UseCompressedClassPointers, false, \ 632260684Skaiw "Use 32-bit class pointers in 64-bit VM. " \ 633260684Skaiw "lp64_product means flag is always constant in 32 bit VM") \ 634260684Skaiw \ 635260684Skaiw notproduct(bool, CheckCompressedOops, true, \ 636260684Skaiw "Generate checks in encoding/decoding code in debug VM") \ 637260684Skaiw \ 638260684Skaiw product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \ 639260684Skaiw "Heap allocation steps through preferred address regions to find" \ 640260684Skaiw " where it can allocate the heap. Number of steps to take per " \ 641260684Skaiw "region.") \ 642260684Skaiw range(1, max_uintx) \ 643260684Skaiw \ 644260684Skaiw diagnostic(bool, PrintCompressedOopsMode, false, \ 645260684Skaiw "Print compressed oops base address and encoding mode") \ 646260684Skaiw \ 647260684Skaiw lp64_product(intx, ObjectAlignmentInBytes, 8, \ 648260684Skaiw "Default object alignment in bytes, 8 is minimum") \ 649260684Skaiw range(8, 256) \ 650260684Skaiw constraint(ObjectAlignmentInBytesConstraintFunc,AtParse) \ 651260684Skaiw \ 652260684Skaiw product(bool, AssumeMP, false, \ 653260684Skaiw "Instruct the VM to assume multiple processors are available") \ 654260684Skaiw \ 655260684Skaiw /* UseMembar is theoretically a temp flag used for memory barrier */ \ 656260684Skaiw /* removal testing. It was supposed to be removed before FCS but has */ \ 657260684Skaiw /* been re-added (see 6401008) */ \ 658260684Skaiw product_pd(bool, UseMembar, \ 659260684Skaiw "(Unstable) Issues membars on thread state transitions") \ 660260684Skaiw \ 661260684Skaiw develop(bool, CleanChunkPoolAsync, falseInEmbedded, \ 662260684Skaiw "Clean the chunk pool asynchronously") \ 663260684Skaiw \ 664260684Skaiw experimental(bool, AlwaysSafeConstructors, false, \ 665260684Skaiw "Force safe construction, as if all fields are final.") \ 666260684Skaiw \ 667260684Skaiw diagnostic(bool, UnlockDiagnosticVMOptions, trueInDebug, \ 668260684Skaiw "Enable normal processing of flags relating to field diagnostics")\ 669260684Skaiw \ 670260684Skaiw experimental(bool, UnlockExperimentalVMOptions, false, \ 671260684Skaiw "Enable normal processing of flags relating to experimental " \ 672260684Skaiw "features") \ 673260684Skaiw \ 674260684Skaiw product(bool, JavaMonitorsInStackTrace, true, \ 675260684Skaiw "Print information about Java monitor locks when the stacks are" \ 676260684Skaiw "dumped") \ 677260684Skaiw \ 678260684Skaiw product_pd(bool, UseLargePages, \ 679260684Skaiw "Use large page memory") \ 680260684Skaiw \ 681260684Skaiw product_pd(bool, UseLargePagesIndividualAllocation, \ 682260684Skaiw "Allocate large pages individually for better affinity") \ 683276371Semaste \ 684276371Semaste develop(bool, LargePagesIndividualAllocationInjectError, false, \ 685276371Semaste "Fail large pages individual allocation") \ 686276371Semaste \ 687276371Semaste product(bool, UseLargePagesInMetaspace, false, \ 688276371Semaste "Use large page memory in metaspace. " \ 689276371Semaste "Only used if UseLargePages is enabled.") \ 690276371Semaste \ 691276371Semaste develop(bool, TracePageSizes, false, \ 692276371Semaste "Trace page size selection and usage") \ 693260684Skaiw \ 694260684Skaiw product(bool, UseNUMA, false, \ 695260684Skaiw "Use NUMA if available") \ 696260684Skaiw \ 697260684Skaiw product(bool, UseNUMAInterleaving, false, \ 698260684Skaiw "Interleave memory across NUMA nodes if available") \ 699260684Skaiw \ 700260684Skaiw product(size_t, NUMAInterleaveGranularity, 2*M, \ 701260684Skaiw "Granularity to use for NUMA interleaving on Windows OS") \ 702260684Skaiw range(os::vm_allocation_granularity(), NOT_LP64(2*G) LP64_ONLY(8192*G)) \ 703260684Skaiw \ 704260684Skaiw product(bool, ForceNUMA, false, \ 705260684Skaiw "Force NUMA optimizations on single-node/UMA systems") \ 706260684Skaiw \ 707260684Skaiw product(uintx, NUMAChunkResizeWeight, 20, \ 708260684Skaiw "Percentage (0-100) used to weight the current sample when " \ 709260684Skaiw "computing exponentially decaying average for " \ 710260684Skaiw "AdaptiveNUMAChunkSizing") \ 711260684Skaiw range(0, 100) \ 712260684Skaiw \ 713260684Skaiw product(size_t, NUMASpaceResizeRate, 1*G, \ 714260684Skaiw "Do not reallocate more than this amount per collection") \ 715276371Semaste range(0, max_uintx) \ 716276371Semaste \ 717260684Skaiw product(bool, UseAdaptiveNUMAChunkSizing, true, \ 718260684Skaiw "Enable adaptive chunk sizing for NUMA") \ 719260684Skaiw \ 720260684Skaiw product(bool, NUMAStats, false, \ 721260684Skaiw "Print NUMA stats in detailed heap information") \ 722260684Skaiw \ 723260684Skaiw product(uintx, NUMAPageScanRate, 256, \ 724260684Skaiw "Maximum number of pages to include in the page scan procedure") \ 725260684Skaiw range(0, max_uintx) \ 726260684Skaiw \ 727260684Skaiw product_pd(bool, NeedsDeoptSuspend, \ 728260684Skaiw "True for register window machines (sparc/ia64)") \ 729260684Skaiw \ 730260684Skaiw product(intx, UseSSE, 99, \ 731260684Skaiw "Highest supported SSE instructions set on x86/x64") \ 732260684Skaiw range(0, 99) \ 733260684Skaiw \ 734260684Skaiw product(bool, UseAES, false, \ 735260684Skaiw "Control whether AES instructions can be used on x86/x64") \ 736260684Skaiw \ 737260684Skaiw product(bool, UseSHA, false, \ 738260684Skaiw "Control whether SHA instructions can be used " \ 739276371Semaste "on SPARC, on ARM and on x86") \ 740276371Semaste \ 741276371Semaste product(bool, UseGHASHIntrinsics, false, \ 742276371Semaste "Use intrinsics for GHASH versions of crypto") \ 743260684Skaiw \ 744260684Skaiw product(size_t, LargePageSizeInBytes, 0, \ 745260684Skaiw "Large page size (0 to let VM choose the page size)") \ 746260684Skaiw range(0, max_uintx) \ 747260684Skaiw \ 748260684Skaiw product(size_t, LargePageHeapSizeThreshold, 128*M, \ 749260684Skaiw "Use large pages if maximum heap is at least this big") \ 750260684Skaiw range(0, max_uintx) \ 751260684Skaiw \ 752260684Skaiw product(bool, ForceTimeHighResolution, false, \ 753260684Skaiw "Using high time resolution (for Win32 only)") \ 754260684Skaiw \ 755260684Skaiw develop(bool, TracePcPatching, false, \ 756276371Semaste "Trace usage of frame::patch_pc") \ 757276371Semaste \ 758276371Semaste develop(bool, TraceJumps, false, \ 759276371Semaste "Trace assembly jumps in thread ring buffer") \ 760276371Semaste \ 761260684Skaiw develop(bool, TraceRelocator, false, \ 762260684Skaiw "Trace the bytecode relocator") \ 763260684Skaiw \ 764260684Skaiw develop(bool, TraceLongCompiles, false, \ 765260684Skaiw "Print out every time compilation is longer than " \ 766276371Semaste "a given threshold") \ 767276371Semaste \ 768260684Skaiw develop(bool, SafepointALot, false, \ 769260684Skaiw "Generate a lot of safepoints. This works with " \ 770260684Skaiw "GuaranteedSafepointInterval") \ 771260684Skaiw \ 772260684Skaiw product_pd(bool, BackgroundCompilation, \ 773260684Skaiw "A thread requesting compilation is not blocked during " \ 774260684Skaiw "compilation") \ 775260684Skaiw \ 776260684Skaiw product(bool, PrintVMQWaitTime, false, \ 777260684Skaiw "Print out the waiting time in VM operation queue") \ 778260684Skaiw \ 779260684Skaiw develop(bool, TraceOopMapGeneration, false, \ 780260684Skaiw "Show OopMapGeneration") \ 781260684Skaiw \ 782260684Skaiw product(bool, MethodFlushing, true, \ 783260684Skaiw "Reclamation of zombie and not-entrant methods") \ 784260684Skaiw \ 785260684Skaiw develop(bool, VerifyStack, false, \ 786260684Skaiw "Verify stack of each thread when it is entering a runtime call") \ 787260684Skaiw \ 788260684Skaiw diagnostic(bool, ForceUnreachable, false, \ 789260684Skaiw "Make all non code cache addresses to be unreachable by " \ 790260684Skaiw "forcing use of 64bit literal fixups") \ 791260684Skaiw \ 792260684Skaiw notproduct(bool, StressDerivedPointers, false, \ 793276371Semaste "Force scavenge when a derived pointer is detected on stack " \ 794276371Semaste "after rtm call") \ 795260684Skaiw \ 796260684Skaiw develop(bool, TraceDerivedPointers, false, \ 797260684Skaiw "Trace traversal of derived pointers on stack") \ 798260684Skaiw \ 799260684Skaiw notproduct(bool, TraceCodeBlobStacks, false, \ 800260684Skaiw "Trace stack-walk of codeblobs") \ 801260684Skaiw \ 802260684Skaiw product(bool, PrintJNIResolving, false, \ 803260684Skaiw "Used to implement -v:jni") \ 804260684Skaiw \ 805260684Skaiw notproduct(bool, PrintRewrites, false, \ 806260684Skaiw "Print methods that are being rewritten") \ 807260684Skaiw \ 808260684Skaiw product(bool, UseInlineCaches, true, \ 809260684Skaiw "Use Inline Caches for virtual calls ") \ 810260684Skaiw \ 811260684Skaiw develop(bool, InlineArrayCopy, true, \ 812260684Skaiw "Inline arraycopy native that is known to be part of " \ 813260684Skaiw "base library DLL") \ 814260684Skaiw \ 815260684Skaiw develop(bool, InlineObjectHash, true, \ 816260684Skaiw "Inline Object::hashCode() native that is known to be part " \ 817260684Skaiw "of base library DLL") \ 818260684Skaiw \ 819260684Skaiw develop(bool, InlineNatives, true, \ 820260684Skaiw "Inline natives that are known to be part of base library DLL") \ 821260684Skaiw \ 822260684Skaiw develop(bool, InlineMathNatives, true, \ 823260684Skaiw "Inline SinD, CosD, etc.") \ 824260684Skaiw \ 825260684Skaiw develop(bool, InlineClassNatives, true, \ 826260684Skaiw "Inline Class.isInstance, etc") \ 827260684Skaiw \ 828260684Skaiw develop(bool, InlineThreadNatives, true, \ 829260684Skaiw "Inline Thread.currentThread, etc") \ 830260684Skaiw \ 831260684Skaiw develop(bool, InlineUnsafeOps, true, \ 832260684Skaiw "Inline memory ops (native methods) from Unsafe") \ 833260684Skaiw \ 834260684Skaiw product(bool, CriticalJNINatives, true, \ 835260684Skaiw "Check for critical JNI entry points") \ 836 \ 837 notproduct(bool, StressCriticalJNINatives, false, \ 838 "Exercise register saving code in critical natives") \ 839 \ 840 product(bool, UseAESIntrinsics, false, \ 841 "Use intrinsics for AES versions of crypto") \ 842 \ 843 product(bool, UseAESCTRIntrinsics, false, \ 844 "Use intrinsics for the paralleled version of AES/CTR crypto") \ 845 \ 846 product(bool, UseSHA1Intrinsics, false, \ 847 "Use intrinsics for SHA-1 crypto hash function. " \ 848 "Requires that UseSHA is enabled.") \ 849 \ 850 product(bool, UseSHA256Intrinsics, false, \ 851 "Use intrinsics for SHA-224 and SHA-256 crypto hash functions. " \ 852 "Requires that UseSHA is enabled.") \ 853 \ 854 product(bool, UseSHA512Intrinsics, false, \ 855 "Use intrinsics for SHA-384 and SHA-512 crypto hash functions. " \ 856 "Requires that UseSHA is enabled.") \ 857 \ 858 product(bool, UseCRC32Intrinsics, false, \ 859 "use intrinsics for java.util.zip.CRC32") \ 860 \ 861 product(bool, UseCRC32CIntrinsics, false, \ 862 "use intrinsics for java.util.zip.CRC32C") \ 863 \ 864 product(bool, UseAdler32Intrinsics, false, \ 865 "use intrinsics for java.util.zip.Adler32") \ 866 \ 867 product(bool, UseVectorizedMismatchIntrinsic, false, \ 868 "Enables intrinsification of ArraysSupport.vectorizedMismatch()") \ 869 \ 870 diagnostic(ccstrlist, DisableIntrinsic, "", \ 871 "do not expand intrinsics whose (internal) names appear here") \ 872 \ 873 develop(bool, TraceCallFixup, false, \ 874 "Trace all call fixups") \ 875 \ 876 develop(bool, DeoptimizeALot, false, \ 877 "Deoptimize at every exit from the runtime system") \ 878 \ 879 notproduct(ccstrlist, DeoptimizeOnlyAt, "", \ 880 "A comma separated list of bcis to deoptimize at") \ 881 \ 882 product(bool, DeoptimizeRandom, false, \ 883 "Deoptimize random frames on random exit from the runtime system")\ 884 \ 885 notproduct(bool, ZombieALot, false, \ 886 "Create zombies (non-entrant) at exit from the runtime system") \ 887 \ 888 product(bool, UnlinkSymbolsALot, false, \ 889 "Unlink unreferenced symbols from the symbol table at safepoints")\ 890 \ 891 notproduct(bool, WalkStackALot, false, \ 892 "Trace stack (no print) at every exit from the runtime system") \ 893 \ 894 product(bool, Debugging, false, \ 895 "Set when executing debug methods in debug.cpp " \ 896 "(to prevent triggering assertions)") \ 897 \ 898 notproduct(bool, StrictSafepointChecks, trueInDebug, \ 899 "Enable strict checks that safepoints cannot happen for threads " \ 900 "that use NoSafepointVerifier") \ 901 \ 902 notproduct(bool, VerifyLastFrame, false, \ 903 "Verify oops on last frame on entry to VM") \ 904 \ 905 product(bool, FailOverToOldVerifier, true, \ 906 "Fail over to old verifier when split verifier fails") \ 907 \ 908 develop(bool, ShowSafepointMsgs, false, \ 909 "Show message about safepoint synchronization") \ 910 \ 911 product(bool, SafepointTimeout, false, \ 912 "Time out and warn or fail after SafepointTimeoutDelay " \ 913 "milliseconds if failed to reach safepoint") \ 914 \ 915 develop(bool, DieOnSafepointTimeout, false, \ 916 "Die upon failure to reach safepoint (see SafepointTimeout)") \ 917 \ 918 /* 50 retries * (5 * current_retry_count) millis = ~6.375 seconds */ \ 919 /* typically, at most a few retries are needed */ \ 920 product(intx, SuspendRetryCount, 50, \ 921 "Maximum retry count for an external suspend request") \ 922 range(0, max_intx) \ 923 \ 924 product(intx, SuspendRetryDelay, 5, \ 925 "Milliseconds to delay per retry (* current_retry_count)") \ 926 range(0, max_intx) \ 927 \ 928 product(bool, AssertOnSuspendWaitFailure, false, \ 929 "Assert/Guarantee on external suspend wait failure") \ 930 \ 931 product(bool, TraceSuspendWaitFailures, false, \ 932 "Trace external suspend wait failures") \ 933 \ 934 product(bool, MaxFDLimit, true, \ 935 "Bump the number of file descriptors to maximum in Solaris") \ 936 \ 937 diagnostic(bool, LogEvents, true, \ 938 "Enable the various ring buffer event logs") \ 939 \ 940 diagnostic(uintx, LogEventsBufferEntries, 10, \ 941 "Number of ring buffer event logs") \ 942 range(1, NOT_LP64(1*K) LP64_ONLY(1*M)) \ 943 \ 944 product(bool, BytecodeVerificationRemote, true, \ 945 "Enable the Java bytecode verifier for remote classes") \ 946 \ 947 product(bool, BytecodeVerificationLocal, false, \ 948 "Enable the Java bytecode verifier for local classes") \ 949 \ 950 develop(bool, ForceFloatExceptions, trueInDebug, \ 951 "Force exceptions on FP stack under/overflow") \ 952 \ 953 develop(bool, VerifyStackAtCalls, false, \ 954 "Verify that the stack pointer is unchanged after calls") \ 955 \ 956 develop(bool, TraceJavaAssertions, false, \ 957 "Trace java language assertions") \ 958 \ 959 notproduct(bool, CheckAssertionStatusDirectives, false, \ 960 "Temporary - see javaClasses.cpp") \ 961 \ 962 notproduct(bool, PrintMallocFree, false, \ 963 "Trace calls to C heap malloc/free allocation") \ 964 \ 965 notproduct(bool, VerifyCodeCache, false, \ 966 "Verify code cache on memory allocation/deallocation") \ 967 \ 968 develop(bool, UseMallocOnly, false, \ 969 "Use only malloc/free for allocation (no resource area/arena)") \ 970 \ 971 develop(bool, PrintMalloc, false, \ 972 "Print all malloc/free calls") \ 973 \ 974 develop(bool, PrintMallocStatistics, false, \ 975 "Print malloc/free statistics") \ 976 \ 977 develop(bool, ZapResourceArea, trueInDebug, \ 978 "Zap freed resource/arena space with 0xABABABAB") \ 979 \ 980 notproduct(bool, ZapVMHandleArea, trueInDebug, \ 981 "Zap freed VM handle space with 0xBCBCBCBC") \ 982 \ 983 develop(bool, ZapJNIHandleArea, trueInDebug, \ 984 "Zap freed JNI handle space with 0xFEFEFEFE") \ 985 \ 986 notproduct(bool, ZapStackSegments, trueInDebug, \ 987 "Zap allocated/freed stack segments with 0xFADFADED") \ 988 \ 989 develop(bool, ZapUnusedHeapArea, trueInDebug, \ 990 "Zap unused heap space with 0xBAADBABE") \ 991 \ 992 develop(bool, CheckZapUnusedHeapArea, false, \ 993 "Check zapping of unused heap space") \ 994 \ 995 develop(bool, ZapFillerObjects, trueInDebug, \ 996 "Zap filler objects with 0xDEAFBABE") \ 997 \ 998 develop(bool, PrintVMMessages, true, \ 999 "Print VM messages on console") \ 1000 \ 1001 notproduct(uintx, ErrorHandlerTest, 0, \ 1002 "If > 0, provokes an error after VM initialization; the value " \ 1003 "determines which error to provoke. See test_error_handler() " \ 1004 "in debug.cpp.") \ 1005 \ 1006 notproduct(uintx, TestCrashInErrorHandler, 0, \ 1007 "If > 0, provokes an error inside VM error handler (a secondary " \ 1008 "crash). see test_error_handler() in debug.cpp.") \ 1009 \ 1010 notproduct(bool, TestSafeFetchInErrorHandler, false, \ 1011 "If true, tests SafeFetch inside error handler.") \ 1012 \ 1013 develop(bool, Verbose, false, \ 1014 "Print additional debugging information from other modes") \ 1015 \ 1016 develop(bool, PrintMiscellaneous, false, \ 1017 "Print uncategorized debugging information (requires +Verbose)") \ 1018 \ 1019 develop(bool, WizardMode, false, \ 1020 "Print much more debugging information") \ 1021 \ 1022 product(bool, ShowMessageBoxOnError, false, \ 1023 "Keep process alive on VM fatal error") \ 1024 \ 1025 product(bool, CreateCoredumpOnCrash, true, \ 1026 "Create core/mini dump on VM fatal error") \ 1027 \ 1028 product(uint64_t, ErrorLogTimeout, 2 * 60, \ 1029 "Timeout, in seconds, to limit the time spent on writing an " \ 1030 "error log in case of a crash.") \ 1031 range(0, (uint64_t)max_jlong/1000) \ 1032 \ 1033 product_pd(bool, UseOSErrorReporting, \ 1034 "Let VM fatal error propagate to the OS (ie. WER on Windows)") \ 1035 \ 1036 product(bool, SuppressFatalErrorMessage, false, \ 1037 "Report NO fatal error message (avoid deadlock)") \ 1038 \ 1039 product(ccstrlist, OnError, "", \ 1040 "Run user-defined commands on fatal error; see VMError.cpp " \ 1041 "for examples") \ 1042 \ 1043 product(ccstrlist, OnOutOfMemoryError, "", \ 1044 "Run user-defined commands on first java.lang.OutOfMemoryError") \ 1045 \ 1046 manageable(bool, HeapDumpBeforeFullGC, false, \ 1047 "Dump heap to file before any major stop-the-world GC") \ 1048 \ 1049 manageable(bool, HeapDumpAfterFullGC, false, \ 1050 "Dump heap to file after any major stop-the-world GC") \ 1051 \ 1052 manageable(bool, HeapDumpOnOutOfMemoryError, false, \ 1053 "Dump heap to file when java.lang.OutOfMemoryError is thrown") \ 1054 \ 1055 manageable(ccstr, HeapDumpPath, NULL, \ 1056 "When HeapDumpOnOutOfMemoryError is on, the path (filename or " \ 1057 "directory) of the dump file (defaults to java_pid<pid>.hprof " \ 1058 "in the working directory)") \ 1059 \ 1060 develop(bool, BreakAtWarning, false, \ 1061 "Execute breakpoint upon encountering VM warning") \ 1062 \ 1063 develop(bool, UseFakeTimers, false, \ 1064 "Tell whether the VM should use system time or a fake timer") \ 1065 \ 1066 product(ccstr, NativeMemoryTracking, "off", \ 1067 "Native memory tracking options") \ 1068 \ 1069 diagnostic(bool, PrintNMTStatistics, false, \ 1070 "Print native memory tracking summary data if it is on") \ 1071 \ 1072 diagnostic(bool, LogCompilation, false, \ 1073 "Log compilation activity in detail to LogFile") \ 1074 \ 1075 product(bool, PrintCompilation, false, \ 1076 "Print compilations") \ 1077 \ 1078 diagnostic(bool, TraceNMethodInstalls, false, \ 1079 "Trace nmethod installation") \ 1080 \ 1081 diagnostic(intx, ScavengeRootsInCode, 2, \ 1082 "0: do not allow scavengable oops in the code cache; " \ 1083 "1: allow scavenging from the code cache; " \ 1084 "2: emit as many constants as the compiler can see") \ 1085 range(0, 2) \ 1086 \ 1087 product(bool, AlwaysRestoreFPU, false, \ 1088 "Restore the FPU control word after every JNI call (expensive)") \ 1089 \ 1090 diagnostic(bool, PrintCompilation2, false, \ 1091 "Print additional statistics per compilation") \ 1092 \ 1093 diagnostic(bool, PrintAdapterHandlers, false, \ 1094 "Print code generated for i2c/c2i adapters") \ 1095 \ 1096 diagnostic(bool, VerifyAdapterCalls, trueInDebug, \ 1097 "Verify that i2c/c2i adapters are called properly") \ 1098 \ 1099 develop(bool, VerifyAdapterSharing, false, \ 1100 "Verify that the code for shared adapters is the equivalent") \ 1101 \ 1102 diagnostic(bool, PrintAssembly, false, \ 1103 "Print assembly code (using external disassembler.so)") \ 1104 \ 1105 diagnostic(ccstr, PrintAssemblyOptions, NULL, \ 1106 "Print options string passed to disassembler.so") \ 1107 \ 1108 notproduct(bool, PrintNMethodStatistics, false, \ 1109 "Print a summary statistic for the generated nmethods") \ 1110 \ 1111 diagnostic(bool, PrintNMethods, false, \ 1112 "Print assembly code for nmethods when generated") \ 1113 \ 1114 diagnostic(bool, PrintNativeNMethods, false, \ 1115 "Print assembly code for native nmethods when generated") \ 1116 \ 1117 develop(bool, PrintDebugInfo, false, \ 1118 "Print debug information for all nmethods when generated") \ 1119 \ 1120 develop(bool, PrintRelocations, false, \ 1121 "Print relocation information for all nmethods when generated") \ 1122 \ 1123 develop(bool, PrintDependencies, false, \ 1124 "Print dependency information for all nmethods when generated") \ 1125 \ 1126 develop(bool, PrintExceptionHandlers, false, \ 1127 "Print exception handler tables for all nmethods when generated") \ 1128 \ 1129 develop(bool, StressCompiledExceptionHandlers, false, \ 1130 "Exercise compiled exception handlers") \ 1131 \ 1132 develop(bool, InterceptOSException, false, \ 1133 "Start debugger when an implicit OS (e.g. NULL) " \ 1134 "exception happens") \ 1135 \ 1136 product(bool, PrintCodeCache, false, \ 1137 "Print the code cache memory usage when exiting") \ 1138 \ 1139 develop(bool, PrintCodeCache2, false, \ 1140 "Print detailed usage information on the code cache when exiting")\ 1141 \ 1142 product(bool, PrintCodeCacheOnCompilation, false, \ 1143 "Print the code cache memory usage each time a method is " \ 1144 "compiled") \ 1145 \ 1146 diagnostic(bool, PrintStubCode, false, \ 1147 "Print generated stub code") \ 1148 \ 1149 product(bool, StackTraceInThrowable, true, \ 1150 "Collect backtrace in throwable when exception happens") \ 1151 \ 1152 product(bool, OmitStackTraceInFastThrow, true, \ 1153 "Omit backtraces for some 'hot' exceptions in optimized code") \ 1154 \ 1155 product(bool, ProfilerPrintByteCodeStatistics, false, \ 1156 "Print bytecode statistics when dumping profiler output") \ 1157 \ 1158 product(bool, ProfilerRecordPC, false, \ 1159 "Collect ticks for each 16 byte interval of compiled code") \ 1160 \ 1161 product(bool, ProfileVM, false, \ 1162 "Profile ticks that fall within VM (either in the VM Thread " \ 1163 "or VM code called through stubs)") \ 1164 \ 1165 product(bool, ProfileIntervals, false, \ 1166 "Print profiles for each interval (see ProfileIntervalsTicks)") \ 1167 \ 1168 notproduct(bool, ProfilerCheckIntervals, false, \ 1169 "Collect and print information on spacing of profiler ticks") \ 1170 \ 1171 product(bool, PrintWarnings, true, \ 1172 "Print JVM warnings to output stream") \ 1173 \ 1174 notproduct(uintx, WarnOnStalledSpinLock, 0, \ 1175 "Print warnings for stalled SpinLocks") \ 1176 \ 1177 product(bool, RegisterFinalizersAtInit, true, \ 1178 "Register finalizable objects at end of Object.<init> or " \ 1179 "after allocation") \ 1180 \ 1181 develop(bool, RegisterReferences, true, \ 1182 "Tell whether the VM should register soft/weak/final/phantom " \ 1183 "references") \ 1184 \ 1185 develop(bool, IgnoreRewrites, false, \ 1186 "Suppress rewrites of bytecodes in the oopmap generator. " \ 1187 "This is unsafe!") \ 1188 \ 1189 develop(bool, PrintCodeCacheExtension, false, \ 1190 "Print extension of code cache") \ 1191 \ 1192 develop(bool, UsePrivilegedStack, true, \ 1193 "Enable the security JVM functions") \ 1194 \ 1195 develop(bool, ProtectionDomainVerification, true, \ 1196 "Verify protection domain before resolution in system dictionary")\ 1197 \ 1198 product(bool, ClassUnloading, true, \ 1199 "Do unloading of classes") \ 1200 \ 1201 product(bool, ClassUnloadingWithConcurrentMark, true, \ 1202 "Do unloading of classes with a concurrent marking cycle") \ 1203 \ 1204 develop(bool, DisableStartThread, false, \ 1205 "Disable starting of additional Java threads " \ 1206 "(for debugging only)") \ 1207 \ 1208 develop(bool, MemProfiling, false, \ 1209 "Write memory usage profiling to log file") \ 1210 \ 1211 notproduct(bool, PrintSystemDictionaryAtExit, false, \ 1212 "Print the system dictionary at exit") \ 1213 \ 1214 experimental(intx, PredictedLoadedClassCount, 0, \ 1215 "Experimental: Tune loaded class cache starting size") \ 1216 \ 1217 diagnostic(bool, UnsyncloadClass, false, \ 1218 "Unstable: VM calls loadClass unsynchronized. Custom " \ 1219 "class loader must call VM synchronized for findClass " \ 1220 "and defineClass.") \ 1221 \ 1222 product(bool, AlwaysLockClassLoader, false, \ 1223 "Require the VM to acquire the class loader lock before calling " \ 1224 "loadClass() even for class loaders registering " \ 1225 "as parallel capable") \ 1226 \ 1227 product(bool, AllowParallelDefineClass, false, \ 1228 "Allow parallel defineClass requests for class loaders " \ 1229 "registering as parallel capable") \ 1230 \ 1231 product(bool, MustCallLoadClassInternal, false, \ 1232 "Call loadClassInternal() rather than loadClass()") \ 1233 \ 1234 product_pd(bool, DontYieldALot, \ 1235 "Throw away obvious excess yield calls") \ 1236 \ 1237 product(bool, ConvertSleepToYield, true, \ 1238 "Convert sleep(0) to thread yield ") \ 1239 \ 1240 product(bool, ConvertYieldToSleep, false, \ 1241 "Convert yield to a sleep of MinSleepInterval to simulate Win32 " \ 1242 "behavior") \ 1243 \ 1244 develop(bool, UseDetachedThreads, true, \ 1245 "Use detached threads that are recycled upon termination " \ 1246 "(for Solaris only)") \ 1247 \ 1248 product(bool, UseLWPSynchronization, true, \ 1249 "Use LWP-based instead of libthread-based synchronization " \ 1250 "(SPARC only)") \ 1251 \ 1252 experimental(ccstr, SyncKnobs, NULL, \ 1253 "(Unstable) Various monitor synchronization tunables") \ 1254 \ 1255 experimental(intx, EmitSync, 0, \ 1256 "(Unsafe, Unstable) " \ 1257 "Control emission of inline sync fast-path code") \ 1258 \ 1259 product(intx, MonitorBound, 0, "Bound Monitor population") \ 1260 range(0, max_jint) \ 1261 \ 1262 product(bool, MonitorInUseLists, false, "Track Monitors for Deflation") \ 1263 \ 1264 experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) " \ 1265 "Experimental Sync flags") \ 1266 \ 1267 experimental(intx, SyncVerbose, 0, "(Unstable)") \ 1268 \ 1269 diagnostic(bool, InlineNotify, true, "intrinsify subset of notify") \ 1270 \ 1271 experimental(intx, ClearFPUAtPark, 0, "(Unsafe, Unstable)") \ 1272 \ 1273 experimental(intx, hashCode, 5, \ 1274 "(Unstable) select hashCode generation algorithm") \ 1275 \ 1276 product(bool, FilterSpuriousWakeups, true, \ 1277 "When true prevents OS-level spurious, or premature, wakeups " \ 1278 "from Object.wait (Ignored for Windows)") \ 1279 \ 1280 experimental(intx, NativeMonitorTimeout, -1, "(Unstable)") \ 1281 \ 1282 experimental(intx, NativeMonitorFlags, 0, "(Unstable)") \ 1283 \ 1284 experimental(intx, NativeMonitorSpinLimit, 20, "(Unstable)") \ 1285 \ 1286 develop(bool, UsePthreads, false, \ 1287 "Use pthread-based instead of libthread-based synchronization " \ 1288 "(SPARC only)") \ 1289 \ 1290 product(bool, ReduceSignalUsage, false, \ 1291 "Reduce the use of OS signals in Java and/or the VM") \ 1292 \ 1293 develop_pd(bool, ShareVtableStubs, \ 1294 "Share vtable stubs (smaller code but worse branch prediction") \ 1295 \ 1296 develop(bool, LoadLineNumberTables, true, \ 1297 "Tell whether the class file parser loads line number tables") \ 1298 \ 1299 develop(bool, LoadLocalVariableTables, true, \ 1300 "Tell whether the class file parser loads local variable tables") \ 1301 \ 1302 develop(bool, LoadLocalVariableTypeTables, true, \ 1303 "Tell whether the class file parser loads local variable type" \ 1304 "tables") \ 1305 \ 1306 product(bool, AllowUserSignalHandlers, false, \ 1307 "Do not complain if the application installs signal handlers " \ 1308 "(Solaris & Linux only)") \ 1309 \ 1310 product(bool, UseSignalChaining, true, \ 1311 "Use signal-chaining to invoke signal handlers installed " \ 1312 "by the application (Solaris & Linux only)") \ 1313 \ 1314 product(bool, AllowJNIEnvProxy, false, \ 1315 "Allow JNIEnv proxies for jdbx") \ 1316 \ 1317 product(bool, RestoreMXCSROnJNICalls, false, \ 1318 "Restore MXCSR when returning from JNI calls") \ 1319 \ 1320 product(bool, CheckJNICalls, false, \ 1321 "Verify all arguments to JNI calls") \ 1322 \ 1323 product(bool, CheckEndorsedAndExtDirs, false, \ 1324 "Verify the endorsed and extension directories are not used") \ 1325 \ 1326 product(bool, UseFastJNIAccessors, true, \ 1327 "Use optimized versions of Get<Primitive>Field") \ 1328 \ 1329 product(intx, MaxJNILocalCapacity, 65536, \ 1330 "Maximum allowable local JNI handle capacity to " \ 1331 "EnsureLocalCapacity() and PushLocalFrame(), " \ 1332 "where <= 0 is unlimited, default: 65536") \ 1333 range(min_intx, max_intx) \ 1334 \ 1335 product(bool, EagerXrunInit, false, \ 1336 "Eagerly initialize -Xrun libraries; allows startup profiling, " \ 1337 "but not all -Xrun libraries may support the state of the VM " \ 1338 "at this time") \ 1339 \ 1340 product(bool, PreserveAllAnnotations, false, \ 1341 "Preserve RuntimeInvisibleAnnotations as well " \ 1342 "as RuntimeVisibleAnnotations") \ 1343 \ 1344 develop(uintx, PreallocatedOutOfMemoryErrorCount, 4, \ 1345 "Number of OutOfMemoryErrors preallocated with backtrace") \ 1346 \ 1347 product(bool, UseXMMForArrayCopy, false, \ 1348 "Use SSE2 MOVQ instruction for Arraycopy") \ 1349 \ 1350 product(intx, FieldsAllocationStyle, 1, \ 1351 "0 - type based with oops first, " \ 1352 "1 - with oops last, " \ 1353 "2 - oops in super and sub classes are together") \ 1354 range(0, 2) \ 1355 \ 1356 product(bool, CompactFields, true, \ 1357 "Allocate nonstatic fields in gaps between previous fields") \ 1358 \ 1359 notproduct(bool, PrintFieldLayout, false, \ 1360 "Print field layout for each class") \ 1361 \ 1362 /* Need to limit the extent of the padding to reasonable size. */\ 1363 /* 8K is well beyond the reasonable HW cache line size, even with */\ 1364 /* aggressive prefetching, while still leaving the room for segregating */\ 1365 /* among the distinct pages. */\ 1366 product(intx, ContendedPaddingWidth, 128, \ 1367 "How many bytes to pad the fields/classes marked @Contended with")\ 1368 range(0, 8192) \ 1369 constraint(ContendedPaddingWidthConstraintFunc,AfterErgo) \ 1370 \ 1371 product(bool, EnableContended, true, \ 1372 "Enable @Contended annotation support") \ 1373 \ 1374 product(bool, RestrictContended, true, \ 1375 "Restrict @Contended to trusted classes") \ 1376 \ 1377 product(bool, UseBiasedLocking, true, \ 1378 "Enable biased locking in JVM") \ 1379 \ 1380 product(intx, BiasedLockingStartupDelay, 4000, \ 1381 "Number of milliseconds to wait before enabling biased locking") \ 1382 range(0, (intx)(max_jint-(max_jint%PeriodicTask::interval_gran))) \ 1383 constraint(BiasedLockingStartupDelayFunc,AfterErgo) \ 1384 \ 1385 diagnostic(bool, PrintBiasedLockingStatistics, false, \ 1386 "Print statistics of biased locking in JVM") \ 1387 \ 1388 product(intx, BiasedLockingBulkRebiasThreshold, 20, \ 1389 "Threshold of number of revocations per type to try to " \ 1390 "rebias all objects in the heap of that type") \ 1391 range(0, max_intx) \ 1392 constraint(BiasedLockingBulkRebiasThresholdFunc,AfterErgo) \ 1393 \ 1394 product(intx, BiasedLockingBulkRevokeThreshold, 40, \ 1395 "Threshold of number of revocations per type to permanently " \ 1396 "revoke biases of all objects in the heap of that type") \ 1397 range(0, max_intx) \ 1398 constraint(BiasedLockingBulkRevokeThresholdFunc,AfterErgo) \ 1399 \ 1400 product(intx, BiasedLockingDecayTime, 25000, \ 1401 "Decay time (in milliseconds) to re-enable bulk rebiasing of a " \ 1402 "type after previous bulk rebias") \ 1403 range(500, max_intx) \ 1404 constraint(BiasedLockingDecayTimeFunc,AfterErgo) \ 1405 \ 1406 product(bool, ExitOnOutOfMemoryError, false, \ 1407 "JVM exits on the first occurrence of an out-of-memory error") \ 1408 \ 1409 product(bool, CrashOnOutOfMemoryError, false, \ 1410 "JVM aborts, producing an error log and core/mini dump, on the " \ 1411 "first occurrence of an out-of-memory error") \ 1412 \ 1413 /* tracing */ \ 1414 \ 1415 develop(bool, StressRewriter, false, \ 1416 "Stress linktime bytecode rewriting") \ 1417 \ 1418 product(ccstr, TraceJVMTI, NULL, \ 1419 "Trace flags for JVMTI functions and events") \ 1420 \ 1421 /* This option can change an EMCP method into an obsolete method. */ \ 1422 /* This can affect tests that except specific methods to be EMCP. */ \ 1423 /* This option should be used with caution. */ \ 1424 product(bool, StressLdcRewrite, false, \ 1425 "Force ldc -> ldc_w rewrite during RedefineClasses") \ 1426 \ 1427 product(uintx, TraceRedefineClasses, 0, \ 1428 "Trace level for JVMTI RedefineClasses") \ 1429 range(0, 0xFFFFFFFF) \ 1430 \ 1431 /* change to false by default sometime after Mustang */ \ 1432 product(bool, VerifyMergedCPBytecodes, true, \ 1433 "Verify bytecodes after RedefineClasses constant pool merging") \ 1434 \ 1435 develop(bool, TraceBytecodes, false, \ 1436 "Trace bytecode execution") \ 1437 \ 1438 develop(bool, TraceICs, false, \ 1439 "Trace inline cache changes") \ 1440 \ 1441 notproduct(bool, TraceInvocationCounterOverflow, false, \ 1442 "Trace method invocation counter overflow") \ 1443 \ 1444 develop(bool, TraceInlineCacheClearing, false, \ 1445 "Trace clearing of inline caches in nmethods") \ 1446 \ 1447 develop(bool, TraceDependencies, false, \ 1448 "Trace dependencies") \ 1449 \ 1450 develop(bool, VerifyDependencies, trueInDebug, \ 1451 "Exercise and verify the compilation dependency mechanism") \ 1452 \ 1453 develop(bool, TraceNewOopMapGeneration, false, \ 1454 "Trace OopMapGeneration") \ 1455 \ 1456 develop(bool, TraceNewOopMapGenerationDetailed, false, \ 1457 "Trace OopMapGeneration: print detailed cell states") \ 1458 \ 1459 develop(bool, TimeOopMap, false, \ 1460 "Time calls to GenerateOopMap::compute_map() in sum") \ 1461 \ 1462 develop(bool, TimeOopMap2, false, \ 1463 "Time calls to GenerateOopMap::compute_map() individually") \ 1464 \ 1465 develop(bool, TraceOopMapRewrites, false, \ 1466 "Trace rewriting of method oops during oop map generation") \ 1467 \ 1468 develop(bool, TraceICBuffer, false, \ 1469 "Trace usage of IC buffer") \ 1470 \ 1471 develop(bool, TraceCompiledIC, false, \ 1472 "Trace changes of compiled IC") \ 1473 \ 1474 /* gc */ \ 1475 \ 1476 product(bool, UseSerialGC, false, \ 1477 "Use the Serial garbage collector") \ 1478 \ 1479 product(bool, UseG1GC, false, \ 1480 "Use the Garbage-First garbage collector") \ 1481 \ 1482 product(bool, UseParallelGC, false, \ 1483 "Use the Parallel Scavenge garbage collector") \ 1484 \ 1485 product(bool, UseParallelOldGC, false, \ 1486 "Use the Parallel Old garbage collector") \ 1487 \ 1488 product(uintx, HeapMaximumCompactionInterval, 20, \ 1489 "How often should we maximally compact the heap (not allowing " \ 1490 "any dead space)") \ 1491 range(0, max_uintx) \ 1492 \ 1493 product(uintx, HeapFirstMaximumCompactionCount, 3, \ 1494 "The collection count for the first maximum compaction") \ 1495 range(0, max_uintx) \ 1496 \ 1497 product(bool, UseMaximumCompactionOnSystemGC, true, \ 1498 "Use maximum compaction in the Parallel Old garbage collector " \ 1499 "for a system GC") \ 1500 \ 1501 product(uintx, ParallelOldDeadWoodLimiterMean, 50, \ 1502 "The mean used by the parallel compact dead wood " \ 1503 "limiter (a number between 0-100)") \ 1504 range(0, 100) \ 1505 \ 1506 product(uintx, ParallelOldDeadWoodLimiterStdDev, 80, \ 1507 "The standard deviation used by the parallel compact dead wood " \ 1508 "limiter (a number between 0-100)") \ 1509 range(0, 100) \ 1510 \ 1511 product(uint, ParallelGCThreads, 0, \ 1512 "Number of parallel threads parallel gc will use") \ 1513 constraint(ParallelGCThreadsConstraintFunc,AfterErgo) \ 1514 \ 1515 diagnostic(bool, UseSemaphoreGCThreadsSynchronization, true, \ 1516 "Use semaphore synchronization for the GC Threads, " \ 1517 "instead of synchronization based on mutexes") \ 1518 \ 1519 product(bool, UseDynamicNumberOfGCThreads, false, \ 1520 "Dynamically choose the number of parallel threads " \ 1521 "parallel gc will use") \ 1522 \ 1523 diagnostic(bool, ForceDynamicNumberOfGCThreads, false, \ 1524 "Force dynamic selection of the number of " \ 1525 "parallel threads parallel gc will use to aid debugging") \ 1526 \ 1527 product(size_t, HeapSizePerGCThread, ScaleForWordSize(64*M), \ 1528 "Size of heap (bytes) per GC thread used in calculating the " \ 1529 "number of GC threads") \ 1530 range((size_t)os::vm_page_size(), (size_t)max_uintx) \ 1531 \ 1532 product(uint, ConcGCThreads, 0, \ 1533 "Number of threads concurrent gc will use") \ 1534 constraint(ConcGCThreadsConstraintFunc,AfterErgo) \ 1535 \ 1536 product(uintx, GCTaskTimeStampEntries, 200, \ 1537 "Number of time stamp entries per gc worker thread") \ 1538 range(1, max_uintx) \ 1539 \ 1540 product(bool, AlwaysTenure, false, \ 1541 "Always tenure objects in eden (ParallelGC only)") \ 1542 \ 1543 product(bool, NeverTenure, false, \ 1544 "Never tenure objects in eden, may tenure on overflow " \ 1545 "(ParallelGC only)") \ 1546 \ 1547 product(bool, ScavengeBeforeFullGC, true, \ 1548 "Scavenge youngest generation before each full GC.") \ 1549 \ 1550 product(bool, UseConcMarkSweepGC, false, \ 1551 "Use Concurrent Mark-Sweep GC in the old generation") \ 1552 \ 1553 product(bool, ExplicitGCInvokesConcurrent, false, \ 1554 "A System.gc() request invokes a concurrent collection; " \ 1555 "(effective only when using concurrent collectors)") \ 1556 \ 1557 product(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false, \ 1558 "A System.gc() request invokes a concurrent collection and " \ 1559 "also unloads classes during such a concurrent gc cycle " \ 1560 "(effective only when UseConcMarkSweepGC)") \ 1561 \ 1562 product(bool, GCLockerInvokesConcurrent, false, \ 1563 "The exit of a JNI critical section necessitating a scavenge, " \ 1564 "also kicks off a background concurrent collection") \ 1565 \ 1566 product(uintx, GCLockerEdenExpansionPercent, 5, \ 1567 "How much the GC can expand the eden by while the GC locker " \ 1568 "is active (as a percentage)") \ 1569 range(0, 100) \ 1570 \ 1571 diagnostic(uintx, GCLockerRetryAllocationCount, 2, \ 1572 "Number of times to retry allocations when " \ 1573 "blocked by the GC locker") \ 1574 range(0, max_uintx) \ 1575 \ 1576 product(bool, UseCMSBestFit, true, \ 1577 "Use CMS best fit allocation strategy") \ 1578 \ 1579 product(bool, UseParNewGC, false, \ 1580 "Use parallel threads in the new generation") \ 1581 \ 1582 product(uintx, ParallelGCBufferWastePct, 10, \ 1583 "Wasted fraction of parallel allocation buffer") \ 1584 range(0, 100) \ 1585 \ 1586 product(uintx, TargetPLABWastePct, 10, \ 1587 "Target wasted space in last buffer as percent of overall " \ 1588 "allocation") \ 1589 range(1, 100) \ 1590 \ 1591 product(uintx, PLABWeight, 75, \ 1592 "Percentage (0-100) used to weight the current sample when " \ 1593 "computing exponentially decaying average for ResizePLAB") \ 1594 range(0, 100) \ 1595 \ 1596 product(bool, ResizePLAB, true, \ 1597 "Dynamically resize (survivor space) promotion LAB's") \ 1598 \ 1599 product(int, ParGCArrayScanChunk, 50, \ 1600 "Scan a subset of object array and push remainder, if array is " \ 1601 "bigger than this") \ 1602 range(1, max_jint/3) \ 1603 \ 1604 product(bool, ParGCUseLocalOverflow, false, \ 1605 "Instead of a global overflow list, use local overflow stacks") \ 1606 \ 1607 product(bool, ParGCTrimOverflow, true, \ 1608 "Eagerly trim the local overflow lists " \ 1609 "(when ParGCUseLocalOverflow)") \ 1610 \ 1611 notproduct(bool, ParGCWorkQueueOverflowALot, false, \ 1612 "Simulate work queue overflow in ParNew") \ 1613 \ 1614 notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ 1615 "An `interval' counter that determines how frequently " \ 1616 "we simulate overflow; a smaller number increases frequency") \ 1617 \ 1618 product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ 1619 "The desired number of objects to claim from the overflow list") \ 1620 range(0, max_uintx) \ 1621 \ 1622 diagnostic(uintx, ParGCStridesPerThread, 2, \ 1623 "The number of strides per worker thread that we divide up the " \ 1624 "card table scanning work into") \ 1625 range(1, max_uintx) \ 1626 constraint(ParGCStridesPerThreadConstraintFunc,AfterErgo) \ 1627 \ 1628 diagnostic(intx, ParGCCardsPerStrideChunk, 256, \ 1629 "The number of cards in each chunk of the parallel chunks used " \ 1630 "during card table scanning") \ 1631 range(1, max_intx) \ 1632 \ 1633 product(uintx, OldPLABWeight, 50, \ 1634 "Percentage (0-100) used to weight the current sample when " \ 1635 "computing exponentially decaying average for resizing " \ 1636 "OldPLABSize") \ 1637 range(0, 100) \ 1638 \ 1639 product(bool, ResizeOldPLAB, true, \ 1640 "Dynamically resize (old gen) promotion LAB's") \ 1641 \ 1642 product(size_t, CMSOldPLABMax, 1024, \ 1643 "Maximum size of CMS gen promotion LAB caches per worker " \ 1644 "per block size") \ 1645 range(1, max_uintx) \ 1646 constraint(CMSOldPLABMaxConstraintFunc,AfterMemoryInit) \ 1647 \ 1648 product(size_t, CMSOldPLABMin, 16, \ 1649 "Minimum size of CMS gen promotion LAB caches per worker " \ 1650 "per block size") \ 1651 range(1, max_uintx) \ 1652 constraint(CMSOldPLABMinConstraintFunc,AfterMemoryInit) \ 1653 \ 1654 product(uintx, CMSOldPLABNumRefills, 4, \ 1655 "Nominal number of refills of CMS gen promotion LAB cache " \ 1656 "per worker per block size") \ 1657 range(1, max_uintx) \ 1658 \ 1659 product(bool, CMSOldPLABResizeQuicker, false, \ 1660 "React on-the-fly during a scavenge to a sudden " \ 1661 "change in block demand rate") \ 1662 \ 1663 product(uintx, CMSOldPLABToleranceFactor, 4, \ 1664 "The tolerance of the phase-change detector for on-the-fly " \ 1665 "PLAB resizing during a scavenge") \ 1666 range(1, max_uintx) \ 1667 \ 1668 product(uintx, CMSOldPLABReactivityFactor, 2, \ 1669 "The gain in the feedback loop for on-the-fly PLAB resizing " \ 1670 "during a scavenge") \ 1671 range(1, max_uintx) \ 1672 \ 1673 product(bool, AlwaysPreTouch, false, \ 1674 "Force all freshly committed pages to be pre-touched") \ 1675 \ 1676 product_pd(size_t, CMSYoungGenPerWorker, \ 1677 "The maximum size of young gen chosen by default per GC worker " \ 1678 "thread available") \ 1679 range(1, max_uintx) \ 1680 \ 1681 product(uintx, CMSIncrementalSafetyFactor, 10, \ 1682 "Percentage (0-100) used to add conservatism when computing the " \ 1683 "duty cycle") \ 1684 range(0, 100) \ 1685 \ 1686 product(uintx, CMSExpAvgFactor, 50, \ 1687 "Percentage (0-100) used to weight the current sample when " \ 1688 "computing exponential averages for CMS statistics") \ 1689 range(0, 100) \ 1690 \ 1691 product(uintx, CMS_FLSWeight, 75, \ 1692 "Percentage (0-100) used to weight the current sample when " \ 1693 "computing exponentially decaying averages for CMS FLS " \ 1694 "statistics") \ 1695 range(0, 100) \ 1696 \ 1697 product(uintx, CMS_FLSPadding, 1, \ 1698 "The multiple of deviation from mean to use for buffering " \ 1699 "against volatility in free list demand") \ 1700 range(0, max_juint) \ 1701 \ 1702 product(uintx, FLSCoalescePolicy, 2, \ 1703 "CMS: aggressiveness level for coalescing, increasing " \ 1704 "from 0 to 4") \ 1705 range(0, 4) \ 1706 \ 1707 product(bool, FLSAlwaysCoalesceLarge, false, \ 1708 "CMS: larger free blocks are always available for coalescing") \ 1709 \ 1710 product(double, FLSLargestBlockCoalesceProximity, 0.99, \ 1711 "CMS: the smaller the percentage the greater the coalescing " \ 1712 "force") \ 1713 range(0.0, 1.0) \ 1714 \ 1715 product(double, CMSSmallCoalSurplusPercent, 1.05, \ 1716 "CMS: the factor by which to inflate estimated demand of small " \ 1717 "block sizes to prevent coalescing with an adjoining block") \ 1718 range(0.0, DBL_MAX) \ 1719 \ 1720 product(double, CMSLargeCoalSurplusPercent, 0.95, \ 1721 "CMS: the factor by which to inflate estimated demand of large " \ 1722 "block sizes to prevent coalescing with an adjoining block") \ 1723 range(0.0, DBL_MAX) \ 1724 \ 1725 product(double, CMSSmallSplitSurplusPercent, 1.10, \ 1726 "CMS: the factor by which to inflate estimated demand of small " \ 1727 "block sizes to prevent splitting to supply demand for smaller " \ 1728 "blocks") \ 1729 range(0.0, DBL_MAX) \ 1730 \ 1731 product(double, CMSLargeSplitSurplusPercent, 1.00, \ 1732 "CMS: the factor by which to inflate estimated demand of large " \ 1733 "block sizes to prevent splitting to supply demand for smaller " \ 1734 "blocks") \ 1735 range(0.0, DBL_MAX) \ 1736 \ 1737 product(bool, CMSExtrapolateSweep, false, \ 1738 "CMS: cushion for block demand during sweep") \ 1739 \ 1740 product(uintx, CMS_SweepWeight, 75, \ 1741 "Percentage (0-100) used to weight the current sample when " \ 1742 "computing exponentially decaying average for inter-sweep " \ 1743 "duration") \ 1744 range(0, 100) \ 1745 \ 1746 product(uintx, CMS_SweepPadding, 1, \ 1747 "The multiple of deviation from mean to use for buffering " \ 1748 "against volatility in inter-sweep duration") \ 1749 range(0, max_juint) \ 1750 \ 1751 product(uintx, CMS_SweepTimerThresholdMillis, 10, \ 1752 "Skip block flux-rate sampling for an epoch unless inter-sweep " \ 1753 "duration exceeds this threshold in milliseconds") \ 1754 range(0, max_uintx) \ 1755 \ 1756 product(bool, CMSClassUnloadingEnabled, true, \ 1757 "Whether class unloading enabled when using CMS GC") \ 1758 \ 1759 product(uintx, CMSClassUnloadingMaxInterval, 0, \ 1760 "When CMS class unloading is enabled, the maximum CMS cycle " \ 1761 "count for which classes may not be unloaded") \ 1762 range(0, max_uintx) \ 1763 \ 1764 product(uintx, CMSIndexedFreeListReplenish, 4, \ 1765 "Replenish an indexed free list with this number of chunks") \ 1766 range(1, max_uintx) \ 1767 \ 1768 product(bool, CMSReplenishIntermediate, true, \ 1769 "Replenish all intermediate free-list caches") \ 1770 \ 1771 product(bool, CMSSplitIndexedFreeListBlocks, true, \ 1772 "When satisfying batched demand, split blocks from the " \ 1773 "IndexedFreeList whose size is a multiple of requested size") \ 1774 \ 1775 product(bool, CMSLoopWarn, false, \ 1776 "Warn in case of excessive CMS looping") \ 1777 \ 1778 /* where does the range max value of (max_jint - 1) come from? */ \ 1779 product(size_t, MarkStackSizeMax, NOT_LP64(4*M) LP64_ONLY(512*M), \ 1780 "Maximum size of marking stack") \ 1781 range(1, (max_jint - 1)) \ 1782 \ 1783 product(size_t, MarkStackSize, NOT_LP64(32*K) LP64_ONLY(4*M), \ 1784 "Size of marking stack") \ 1785 constraint(MarkStackSizeConstraintFunc,AfterErgo) \ 1786 \ 1787 notproduct(bool, CMSMarkStackOverflowALot, false, \ 1788 "Simulate frequent marking stack / work queue overflow") \ 1789 \ 1790 notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ 1791 "An \"interval\" counter that determines how frequently " \ 1792 "to simulate overflow; a smaller number increases frequency") \ 1793 \ 1794 product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ 1795 "Maximum number of abortable preclean iterations, if > 0") \ 1796 range(0, max_uintx) \ 1797 \ 1798 product(intx, CMSMaxAbortablePrecleanTime, 5000, \ 1799 "Maximum time in abortable preclean (in milliseconds)") \ 1800 range(0, max_intx) \ 1801 \ 1802 product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \ 1803 "Nominal minimum work per abortable preclean iteration") \ 1804 range(0, max_uintx) \ 1805 \ 1806 manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \ 1807 "Time that we sleep between iterations when not given " \ 1808 "enough work per iteration") \ 1809 range(0, max_intx) \ 1810 \ 1811 product(size_t, CMSRescanMultiple, 32, \ 1812 "Size (in cards) of CMS parallel rescan task") \ 1813 range(1, max_uintx) \ 1814 \ 1815 product(size_t, CMSConcMarkMultiple, 32, \ 1816 "Size (in cards) of CMS concurrent MT marking task") \ 1817 range(1, max_uintx) \ 1818 \ 1819 product(bool, CMSAbortSemantics, false, \ 1820 "Whether abort-on-overflow semantics is implemented") \ 1821 \ 1822 product(bool, CMSParallelInitialMarkEnabled, true, \ 1823 "Use the parallel initial mark.") \ 1824 \ 1825 product(bool, CMSParallelRemarkEnabled, true, \ 1826 "Whether parallel remark enabled (only if ParNewGC)") \ 1827 \ 1828 product(bool, CMSParallelSurvivorRemarkEnabled, true, \ 1829 "Whether parallel remark of survivor space " \ 1830 "enabled (effective only if CMSParallelRemarkEnabled)") \ 1831 \ 1832 product(bool, CMSPLABRecordAlways, true, \ 1833 "Always record survivor space PLAB boundaries (effective only " \ 1834 "if CMSParallelSurvivorRemarkEnabled)") \ 1835 \ 1836 product(bool, CMSEdenChunksRecordAlways, true, \ 1837 "Always record eden chunks used for the parallel initial mark " \ 1838 "or remark of eden") \ 1839 \ 1840 product(bool, CMSConcurrentMTEnabled, true, \ 1841 "Whether multi-threaded concurrent work enabled " \ 1842 "(effective only if ParNewGC)") \ 1843 \ 1844 product(bool, CMSPrecleaningEnabled, true, \ 1845 "Whether concurrent precleaning enabled") \ 1846 \ 1847 product(uintx, CMSPrecleanIter, 3, \ 1848 "Maximum number of precleaning iteration passes") \ 1849 range(0, 9) \ 1850 \ 1851 product(uintx, CMSPrecleanDenominator, 3, \ 1852 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1853 "ratio") \ 1854 range(1, max_uintx) \ 1855 constraint(CMSPrecleanDenominatorConstraintFunc,AfterErgo) \ 1856 \ 1857 product(uintx, CMSPrecleanNumerator, 2, \ 1858 "CMSPrecleanNumerator:CMSPrecleanDenominator yields convergence " \ 1859 "ratio") \ 1860 range(0, max_uintx-1) \ 1861 constraint(CMSPrecleanNumeratorConstraintFunc,AfterErgo) \ 1862 \ 1863 product(bool, CMSPrecleanRefLists1, true, \ 1864 "Preclean ref lists during (initial) preclean phase") \ 1865 \ 1866 product(bool, CMSPrecleanRefLists2, false, \ 1867 "Preclean ref lists during abortable preclean phase") \ 1868 \ 1869 product(bool, CMSPrecleanSurvivors1, false, \ 1870 "Preclean survivors during (initial) preclean phase") \ 1871 \ 1872 product(bool, CMSPrecleanSurvivors2, true, \ 1873 "Preclean survivors during abortable preclean phase") \ 1874 \ 1875 product(uintx, CMSPrecleanThreshold, 1000, \ 1876 "Do not iterate again if number of dirty cards is less than this")\ 1877 range(100, max_uintx) \ 1878 \ 1879 product(bool, CMSCleanOnEnter, true, \ 1880 "Clean-on-enter optimization for reducing number of dirty cards") \ 1881 \ 1882 product(uintx, CMSRemarkVerifyVariant, 1, \ 1883 "Choose variant (1,2) of verification following remark") \ 1884 range(1, 2) \ 1885 \ 1886 product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \ 1887 "If Eden size is below this, do not try to schedule remark") \ 1888 range(0, max_uintx) \ 1889 \ 1890 product(uintx, CMSScheduleRemarkEdenPenetration, 50, \ 1891 "The Eden occupancy percentage (0-100) at which " \ 1892 "to try and schedule remark pause") \ 1893 range(0, 100) \ 1894 \ 1895 product(uintx, CMSScheduleRemarkSamplingRatio, 5, \ 1896 "Start sampling eden top at least before young gen " \ 1897 "occupancy reaches 1/<ratio> of the size at which " \ 1898 "we plan to schedule remark") \ 1899 range(1, max_uintx) \ 1900 \ 1901 product(uintx, CMSSamplingGrain, 16*K, \ 1902 "The minimum distance between eden samples for CMS (see above)") \ 1903 range(ObjectAlignmentInBytes, max_uintx) \ 1904 constraint(CMSSamplingGrainConstraintFunc,AfterMemoryInit) \ 1905 \ 1906 product(bool, CMSScavengeBeforeRemark, false, \ 1907 "Attempt scavenge before the CMS remark step") \ 1908 \ 1909 product(uintx, CMSWorkQueueDrainThreshold, 10, \ 1910 "Don't drain below this size per parallel worker/thief") \ 1911 range(1, max_juint) \ 1912 constraint(CMSWorkQueueDrainThresholdConstraintFunc,AfterErgo) \ 1913 \ 1914 manageable(intx, CMSWaitDuration, 2000, \ 1915 "Time in milliseconds that CMS thread waits for young GC") \ 1916 range(min_jint, max_jint) \ 1917 \ 1918 develop(uintx, CMSCheckInterval, 1000, \ 1919 "Interval in milliseconds that CMS thread checks if it " \ 1920 "should start a collection cycle") \ 1921 \ 1922 product(bool, CMSYield, true, \ 1923 "Yield between steps of CMS") \ 1924 \ 1925 product(size_t, CMSBitMapYieldQuantum, 10*M, \ 1926 "Bitmap operations should process at most this many bits " \ 1927 "between yields") \ 1928 range(1, max_uintx) \ 1929 \ 1930 product(bool, CMSPrintChunksInDump, false, \ 1931 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1932 "trace level include more detailed information about the" \ 1933 "free chunks") \ 1934 \ 1935 product(bool, CMSPrintObjectsInDump, false, \ 1936 "If logging for the \"gc\" and \"promotion\" tags is enabled on" \ 1937 "trace level include more detailed information about the" \ 1938 "allocated objects") \ 1939 \ 1940 diagnostic(bool, FLSVerifyAllHeapReferences, false, \ 1941 "Verify that all references across the FLS boundary " \ 1942 "are to valid objects") \ 1943 \ 1944 diagnostic(bool, FLSVerifyLists, false, \ 1945 "Do lots of (expensive) FreeListSpace verification") \ 1946 \ 1947 diagnostic(bool, FLSVerifyIndexTable, false, \ 1948 "Do lots of (expensive) FLS index table verification") \ 1949 \ 1950 develop(bool, FLSVerifyDictionary, false, \ 1951 "Do lots of (expensive) FLS dictionary verification") \ 1952 \ 1953 develop(bool, VerifyBlockOffsetArray, false, \ 1954 "Do (expensive) block offset array verification") \ 1955 \ 1956 diagnostic(bool, BlockOffsetArrayUseUnallocatedBlock, false, \ 1957 "Maintain _unallocated_block in BlockOffsetArray " \ 1958 "(currently applicable only to CMS collector)") \ 1959 \ 1960 product(intx, RefDiscoveryPolicy, 0, \ 1961 "Select type of reference discovery policy: " \ 1962 "reference-based(0) or referent-based(1)") \ 1963 range(ReferenceProcessor::DiscoveryPolicyMin, \ 1964 ReferenceProcessor::DiscoveryPolicyMax) \ 1965 \ 1966 product(bool, ParallelRefProcEnabled, false, \ 1967 "Enable parallel reference processing whenever possible") \ 1968 \ 1969 product(bool, ParallelRefProcBalancingEnabled, true, \ 1970 "Enable balancing of reference processing queues") \ 1971 \ 1972 product(uintx, CMSTriggerRatio, 80, \ 1973 "Percentage of MinHeapFreeRatio in CMS generation that is " \ 1974 "allocated before a CMS collection cycle commences") \ 1975 range(0, 100) \ 1976 \ 1977 product(uintx, CMSBootstrapOccupancy, 50, \ 1978 "Percentage CMS generation occupancy at which to " \ 1979 "initiate CMS collection for bootstrapping collection stats") \ 1980 range(0, 100) \ 1981 \ 1982 product(intx, CMSInitiatingOccupancyFraction, -1, \ 1983 "Percentage CMS generation occupancy to start a CMS collection " \ 1984 "cycle. A negative value means that CMSTriggerRatio is used") \ 1985 range(min_intx, 100) \ 1986 \ 1987 product(uintx, InitiatingHeapOccupancyPercent, 45, \ 1988 "The percent occupancy (IHOP) of the current old generation " \ 1989 "capacity above which a concurrent mark cycle will be initiated " \ 1990 "Its value may change over time if adaptive IHOP is enabled, " \ 1991 "otherwise the value remains constant. " \ 1992 "In the latter case a value of 0 will result as frequent as " \ 1993 "possible concurrent marking cycles. A value of 100 disables " \ 1994 "concurrent marking. " \ 1995 "Fragmentation waste in the old generation is not considered " \ 1996 "free space in this calculation. (G1 collector only)") \ 1997 range(0, 100) \ 1998 \ 1999 manageable(intx, CMSTriggerInterval, -1, \ 2000 "Commence a CMS collection cycle (at least) every so many " \ 2001 "milliseconds (0 permanently, -1 disabled)") \ 2002 range(-1, max_intx) \ 2003 \ 2004 product(bool, UseCMSInitiatingOccupancyOnly, false, \ 2005 "Only use occupancy as a criterion for starting a CMS collection")\ 2006 \ 2007 product(uintx, CMSIsTooFullPercentage, 98, \ 2008 "An absolute ceiling above which CMS will always consider the " \ 2009 "unloading of classes when class unloading is enabled") \ 2010 range(0, 100) \ 2011 \ 2012 develop(bool, CMSTestInFreeList, false, \ 2013 "Check if the coalesced range is already in the " \ 2014 "free lists as claimed") \ 2015 \ 2016 notproduct(bool, CMSVerifyReturnedBytes, false, \ 2017 "Check that all the garbage collected was returned to the " \ 2018 "free lists") \ 2019 \ 2020 notproduct(bool, ScavengeALot, false, \ 2021 "Force scavenge at every Nth exit from the runtime system " \ 2022 "(N=ScavengeALotInterval)") \ 2023 \ 2024 develop(bool, FullGCALot, false, \ 2025 "Force full gc at every Nth exit from the runtime system " \ 2026 "(N=FullGCALotInterval)") \ 2027 \ 2028 notproduct(bool, GCALotAtAllSafepoints, false, \ 2029 "Enforce ScavengeALot/GCALot at all potential safepoints") \ 2030 \ 2031 notproduct(bool, PromotionFailureALot, false, \ 2032 "Use promotion failure handling on every youngest generation " \ 2033 "collection") \ 2034 \ 2035 develop(uintx, PromotionFailureALotCount, 1000, \ 2036 "Number of promotion failures occurring at PLAB " \ 2037 "refill attempts (ParNew) or promotion attempts " \ 2038 "(other young collectors)") \ 2039 \ 2040 develop(uintx, PromotionFailureALotInterval, 5, \ 2041 "Total collections between promotion failures a lot") \ 2042 \ 2043 experimental(uintx, WorkStealingSleepMillis, 1, \ 2044 "Sleep time when sleep is used for yields") \ 2045 \ 2046 experimental(uintx, WorkStealingYieldsBeforeSleep, 5000, \ 2047 "Number of yields before a sleep is done during work stealing") \ 2048 \ 2049 experimental(uintx, WorkStealingHardSpins, 4096, \ 2050 "Number of iterations in a spin loop between checks on " \ 2051 "time out of hard spin") \ 2052 \ 2053 experimental(uintx, WorkStealingSpinToYieldRatio, 10, \ 2054 "Ratio of hard spins to calls to yield") \ 2055 \ 2056 develop(uintx, ObjArrayMarkingStride, 512, \ 2057 "Number of object array elements to push onto the marking stack " \ 2058 "before pushing a continuation entry") \ 2059 \ 2060 develop(bool, MetadataAllocationFailALot, false, \ 2061 "Fail metadata allocations at intervals controlled by " \ 2062 "MetadataAllocationFailALotInterval") \ 2063 \ 2064 develop(uintx, MetadataAllocationFailALotInterval, 1000, \ 2065 "Metadata allocation failure a lot interval") \ 2066 \ 2067 notproduct(bool, ExecuteInternalVMTests, false, \ 2068 "Enable execution of internal VM tests") \ 2069 \ 2070 notproduct(bool, VerboseInternalVMTests, false, \ 2071 "Turn on logging for internal VM tests.") \ 2072 \ 2073 product_pd(bool, UseTLAB, "Use thread-local object allocation") \ 2074 \ 2075 product_pd(bool, ResizeTLAB, \ 2076 "Dynamically resize TLAB size for threads") \ 2077 \ 2078 product(bool, ZeroTLAB, false, \ 2079 "Zero out the newly created TLAB") \ 2080 \ 2081 product(bool, FastTLABRefill, true, \ 2082 "Use fast TLAB refill code") \ 2083 \ 2084 product(bool, TLABStats, true, \ 2085 "Provide more detailed and expensive TLAB statistics.") \ 2086 \ 2087 product_pd(bool, NeverActAsServerClassMachine, \ 2088 "Never act like a server-class machine") \ 2089 \ 2090 product(bool, AlwaysActAsServerClassMachine, false, \ 2091 "Always act like a server-class machine") \ 2092 \ 2093 product_pd(uint64_t, MaxRAM, \ 2094 "Real memory size (in bytes) used to set maximum heap size") \ 2095 range(0, 0XFFFFFFFFFFFFFFFF) \ 2096 \ 2097 product(size_t, ErgoHeapSizeLimit, 0, \ 2098 "Maximum ergonomically set heap size (in bytes); zero means use " \ 2099 "MaxRAM / MaxRAMFraction") \ 2100 range(0, max_uintx) \ 2101 \ 2102 product(uintx, MaxRAMFraction, 4, \ 2103 "Maximum fraction (1/n) of real memory used for maximum heap " \ 2104 "size") \ 2105 range(1, max_uintx) \ 2106 \ 2107 product(uintx, MinRAMFraction, 2, \ 2108 "Minimum fraction (1/n) of real memory used for maximum heap " \ 2109 "size on systems with small physical memory size") \ 2110 range(1, max_uintx) \ 2111 \ 2112 product(uintx, InitialRAMFraction, 64, \ 2113 "Fraction (1/n) of real memory used for initial heap size") \ 2114 range(1, max_uintx) \ 2115 \ 2116 develop(uintx, MaxVirtMemFraction, 2, \ 2117 "Maximum fraction (1/n) of virtual memory used for ergonomically "\ 2118 "determining maximum heap size") \ 2119 \ 2120 product(bool, UseAutoGCSelectPolicy, false, \ 2121 "Use automatic collection selection policy") \ 2122 \ 2123 product(uintx, AutoGCSelectPauseMillis, 5000, \ 2124 "Automatic GC selection pause threshold in milliseconds") \ 2125 range(0, max_uintx) \ 2126 \ 2127 product(bool, UseAdaptiveSizePolicy, true, \ 2128 "Use adaptive generation sizing policies") \ 2129 \ 2130 product(bool, UsePSAdaptiveSurvivorSizePolicy, true, \ 2131 "Use adaptive survivor sizing policies") \ 2132 \ 2133 product(bool, UseAdaptiveGenerationSizePolicyAtMinorCollection, true, \ 2134 "Use adaptive young-old sizing policies at minor collections") \ 2135 \ 2136 product(bool, UseAdaptiveGenerationSizePolicyAtMajorCollection, true, \ 2137 "Use adaptive young-old sizing policies at major collections") \ 2138 \ 2139 product(bool, UseAdaptiveSizePolicyWithSystemGC, false, \ 2140 "Include statistics from System.gc() for adaptive size policy") \ 2141 \ 2142 product(bool, UseAdaptiveGCBoundary, false, \ 2143 "Allow young-old boundary to move") \ 2144 \ 2145 develop(intx, PSAdaptiveSizePolicyResizeVirtualSpaceAlot, -1, \ 2146 "Resize the virtual spaces of the young or old generations") \ 2147 range(-1, 1) \ 2148 \ 2149 product(uintx, AdaptiveSizeThroughPutPolicy, 0, \ 2150 "Policy for changing generation size for throughput goals") \ 2151 range(0, 1) \ 2152 \ 2153 product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \ 2154 "Number of steps where heuristics is used before data is used") \ 2155 range(0, max_uintx) \ 2156 \ 2157 develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \ 2158 "Number of collections before the adaptive sizing is started") \ 2159 \ 2160 product(uintx, AdaptiveSizePolicyOutputInterval, 0, \ 2161 "Collection interval for printing information; zero means never") \ 2162 range(0, max_uintx) \ 2163 \ 2164 product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \ 2165 "Use adaptive minimum footprint as a goal") \ 2166 \ 2167 product(uintx, AdaptiveSizePolicyWeight, 10, \ 2168 "Weight given to exponential resizing, between 0 and 100") \ 2169 range(0, 100) \ 2170 \ 2171 product(uintx, AdaptiveTimeWeight, 25, \ 2172 "Weight given to time in adaptive policy, between 0 and 100") \ 2173 range(0, 100) \ 2174 \ 2175 product(uintx, PausePadding, 1, \ 2176 "How much buffer to keep for pause time") \ 2177 range(0, max_juint) \ 2178 \ 2179 product(uintx, PromotedPadding, 3, \ 2180 "How much buffer to keep for promotion failure") \ 2181 range(0, max_juint) \ 2182 \ 2183 product(uintx, SurvivorPadding, 3, \ 2184 "How much buffer to keep for survivor overflow") \ 2185 range(0, max_juint) \ 2186 \ 2187 product(uintx, ThresholdTolerance, 10, \ 2188 "Allowed collection cost difference between generations") \ 2189 range(0, 100) \ 2190 \ 2191 product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \ 2192 "If collection costs are within margin, reduce both by full " \ 2193 "delta") \ 2194 range(0, 100) \ 2195 \ 2196 product(uintx, YoungGenerationSizeIncrement, 20, \ 2197 "Adaptive size percentage change in young generation") \ 2198 range(0, 100) \ 2199 \ 2200 product(uintx, YoungGenerationSizeSupplement, 80, \ 2201 "Supplement to YoungedGenerationSizeIncrement used at startup") \ 2202 range(0, 100) \ 2203 \ 2204 product(uintx, YoungGenerationSizeSupplementDecay, 8, \ 2205 "Decay factor to YoungedGenerationSizeSupplement") \ 2206 range(1, max_uintx) \ 2207 \ 2208 product(uintx, TenuredGenerationSizeIncrement, 20, \ 2209 "Adaptive size percentage change in tenured generation") \ 2210 range(0, 100) \ 2211 \ 2212 product(uintx, TenuredGenerationSizeSupplement, 80, \ 2213 "Supplement to TenuredGenerationSizeIncrement used at startup") \ 2214 range(0, 100) \ 2215 \ 2216 product(uintx, TenuredGenerationSizeSupplementDecay, 2, \ 2217 "Decay factor to TenuredGenerationSizeIncrement") \ 2218 range(1, max_uintx) \ 2219 \ 2220 product(uintx, MaxGCPauseMillis, max_uintx - 1, \ 2221 "Adaptive size policy maximum GC pause time goal in millisecond, "\ 2222 "or (G1 Only) the maximum GC time per MMU time slice") \ 2223 range(1, max_uintx - 1) \ 2224 constraint(MaxGCPauseMillisConstraintFunc,AfterMemoryInit) \ 2225 \ 2226 product(uintx, GCPauseIntervalMillis, 0, \ 2227 "Time slice for MMU specification") \ 2228 constraint(GCPauseIntervalMillisConstraintFunc,AfterMemoryInit) \ 2229 \ 2230 product(uintx, MaxGCMinorPauseMillis, max_uintx, \ 2231 "Adaptive size policy maximum GC minor pause time goal " \ 2232 "in millisecond") \ 2233 range(0, max_uintx) \ 2234 \ 2235 product(uintx, GCTimeRatio, 99, \ 2236 "Adaptive size policy application time to GC time ratio") \ 2237 range(0, max_juint) \ 2238 \ 2239 product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \ 2240 "Adaptive size scale down factor for shrinking") \ 2241 range(1, max_uintx) \ 2242 \ 2243 product(bool, UseAdaptiveSizeDecayMajorGCCost, true, \ 2244 "Adaptive size decays the major cost for long major intervals") \ 2245 \ 2246 product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \ 2247 "Time scale over which major costs decay") \ 2248 range(0, max_uintx) \ 2249 \ 2250 product(uintx, MinSurvivorRatio, 3, \ 2251 "Minimum ratio of young generation/survivor space size") \ 2252 range(3, max_uintx) \ 2253 \ 2254 product(uintx, InitialSurvivorRatio, 8, \ 2255 "Initial ratio of young generation/survivor space size") \ 2256 range(0, max_uintx) \ 2257 \ 2258 product(size_t, BaseFootPrintEstimate, 256*M, \ 2259 "Estimate of footprint other than Java Heap") \ 2260 range(0, max_uintx) \ 2261 \ 2262 product(bool, UseGCOverheadLimit, true, \ 2263 "Use policy to limit of proportion of time spent in GC " \ 2264 "before an OutOfMemory error is thrown") \ 2265 \ 2266 product(uintx, GCTimeLimit, 98, \ 2267 "Limit of the proportion of time spent in GC before " \ 2268 "an OutOfMemoryError is thrown (used with GCHeapFreeLimit)") \ 2269 range(0, 100) \ 2270 \ 2271 product(uintx, GCHeapFreeLimit, 2, \ 2272 "Minimum percentage of free space after a full GC before an " \ 2273 "OutOfMemoryError is thrown (used with GCTimeLimit)") \ 2274 range(0, 100) \ 2275 \ 2276 develop(uintx, AdaptiveSizePolicyGCTimeLimitThreshold, 5, \ 2277 "Number of consecutive collections before gc time limit fires") \ 2278 range(1, max_uintx) \ 2279 \ 2280 product(intx, PrefetchCopyIntervalInBytes, -1, \ 2281 "How far ahead to prefetch destination area (<= 0 means off)") \ 2282 range(-1, max_jint) \ 2283 \ 2284 product(intx, PrefetchScanIntervalInBytes, -1, \ 2285 "How far ahead to prefetch scan area (<= 0 means off)") \ 2286 range(-1, max_jint) \ 2287 \ 2288 product(intx, PrefetchFieldsAhead, -1, \ 2289 "How many fields ahead to prefetch in oop scan (<= 0 means off)") \ 2290 range(-1, max_jint) \ 2291 \ 2292 diagnostic(bool, VerifyDuringStartup, false, \ 2293 "Verify memory system before executing any Java code " \ 2294 "during VM initialization") \ 2295 \ 2296 diagnostic(bool, VerifyBeforeExit, trueInDebug, \ 2297 "Verify system before exiting") \ 2298 \ 2299 diagnostic(bool, VerifyBeforeGC, false, \ 2300 "Verify memory system before GC") \ 2301 \ 2302 diagnostic(bool, VerifyAfterGC, false, \ 2303 "Verify memory system after GC") \ 2304 \ 2305 diagnostic(bool, VerifyDuringGC, false, \ 2306 "Verify memory system during GC (between phases)") \ 2307 \ 2308 diagnostic(ccstrlist, VerifySubSet, "", \ 2309 "Memory sub-systems to verify when Verify*GC flag(s) " \ 2310 "are enabled. One or more sub-systems can be specified " \ 2311 "in a comma separated string. Sub-systems are: " \ 2312 "threads, heap, symbol_table, string_table, codecache, " \ 2313 "dictionary, classloader_data_graph, metaspace, jni_handles, " \ 2314 "c-heap, codecache_oops") \ 2315 \ 2316 diagnostic(bool, GCParallelVerificationEnabled, true, \ 2317 "Enable parallel memory system verification") \ 2318 \ 2319 diagnostic(bool, DeferInitialCardMark, false, \ 2320 "When +ReduceInitialCardMarks, explicitly defer any that " \ 2321 "may arise from new_pre_store_barrier") \ 2322 \ 2323 product(bool, UseCondCardMark, false, \ 2324 "Check for already marked card before updating card table") \ 2325 \ 2326 diagnostic(bool, VerifyRememberedSets, false, \ 2327 "Verify GC remembered sets") \ 2328 \ 2329 diagnostic(bool, VerifyObjectStartArray, true, \ 2330 "Verify GC object start array if verify before/after") \ 2331 \ 2332 product(bool, DisableExplicitGC, false, \ 2333 "Ignore calls to System.gc()") \ 2334 \ 2335 notproduct(bool, CheckMemoryInitialization, false, \ 2336 "Check memory initialization") \ 2337 \ 2338 diagnostic(bool, BindCMSThreadToCPU, false, \ 2339 "Bind CMS Thread to CPU if possible") \ 2340 \ 2341 diagnostic(uintx, CPUForCMSThread, 0, \ 2342 "When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \ 2343 range(0, max_juint) \ 2344 \ 2345 product(bool, BindGCTaskThreadsToCPUs, false, \ 2346 "Bind GCTaskThreads to CPUs if possible") \ 2347 \ 2348 product(bool, UseGCTaskAffinity, false, \ 2349 "Use worker affinity when asking for GCTasks") \ 2350 \ 2351 product(uintx, ProcessDistributionStride, 4, \ 2352 "Stride through processors when distributing processes") \ 2353 range(0, max_juint) \ 2354 \ 2355 product(uintx, CMSCoordinatorYieldSleepCount, 10, \ 2356 "Number of times the coordinator GC thread will sleep while " \ 2357 "yielding before giving up and resuming GC") \ 2358 range(0, max_juint) \ 2359 \ 2360 product(uintx, CMSYieldSleepCount, 0, \ 2361 "Number of times a GC thread (minus the coordinator) " \ 2362 "will sleep while yielding before giving up and resuming GC") \ 2363 range(0, max_juint) \ 2364 \ 2365 product(bool, PrintGC, false, \ 2366 "Print message at garbage collection. " \ 2367 "Deprecated, use -Xlog:gc instead.") \ 2368 \ 2369 product(bool, PrintGCDetails, false, \ 2370 "Print more details at garbage collection. " \ 2371 "Deprecated, use -Xlog:gc* instead.") \ 2372 \ 2373 develop(intx, ConcGCYieldTimeout, 0, \ 2374 "If non-zero, assert that GC threads yield within this " \ 2375 "number of milliseconds") \ 2376 range(0, max_intx) \ 2377 \ 2378 develop(bool, TraceFinalizerRegistration, false, \ 2379 "Trace registration of final references") \ 2380 \ 2381 notproduct(bool, TraceScavenge, false, \ 2382 "Trace scavenge") \ 2383 \ 2384 product(bool, IgnoreEmptyClassPaths, false, \ 2385 "Ignore empty path elements in -classpath") \ 2386 \ 2387 product(size_t, InitialBootClassLoaderMetaspaceSize, \ 2388 NOT_LP64(2200*K) LP64_ONLY(4*M), \ 2389 "Initial size of the boot class loader data metaspace") \ 2390 range(30*K, max_uintx/BytesPerWord) \ 2391 constraint(InitialBootClassLoaderMetaspaceSizeConstraintFunc, AfterErgo)\ 2392 \ 2393 product(bool, TraceYoungGenTime, false, \ 2394 "Trace accumulated time for young collection") \ 2395 \ 2396 product(bool, TraceOldGenTime, false, \ 2397 "Trace accumulated time for old collection") \ 2398 \ 2399 product(bool, PrintHeapAtSIGBREAK, true, \ 2400 "Print heap layout in response to SIGBREAK") \ 2401 \ 2402 manageable(bool, PrintClassHistogram, false, \ 2403 "Print a histogram of class instances") \ 2404 \ 2405 develop(bool, TraceWorkGang, false, \ 2406 "Trace activities of work gangs") \ 2407 \ 2408 develop(bool, TraceGCTaskManager, false, \ 2409 "Trace actions of the GC task manager") \ 2410 \ 2411 develop(bool, TraceGCTaskQueue, false, \ 2412 "Trace actions of the GC task queues") \ 2413 \ 2414 diagnostic(bool, TraceGCTaskThread, false, \ 2415 "Trace actions of the GC task threads") \ 2416 \ 2417 develop(bool, TraceParallelOldGCMarkingPhase, false, \ 2418 "Trace marking phase in ParallelOldGC") \ 2419 \ 2420 develop(bool, TraceParallelOldGCDensePrefix, false, \ 2421 "Trace dense prefix computation for ParallelOldGC") \ 2422 \ 2423 develop(bool, IgnoreLibthreadGPFault, false, \ 2424 "Suppress workaround for libthread GP fault") \ 2425 \ 2426 experimental(double, ObjectCountCutOffPercent, 0.5, \ 2427 "The percentage of the used heap that the instances of a class " \ 2428 "must occupy for the class to generate a trace event") \ 2429 range(0.0, 100.0) \ 2430 \ 2431 /* JVMTI heap profiling */ \ 2432 \ 2433 diagnostic(bool, TraceJVMTIObjectTagging, false, \ 2434 "Trace JVMTI object tagging calls") \ 2435 \ 2436 diagnostic(bool, VerifyBeforeIteration, false, \ 2437 "Verify memory system before JVMTI iteration") \ 2438 \ 2439 /* compiler interface */ \ 2440 \ 2441 develop(bool, CIPrintCompilerName, false, \ 2442 "when CIPrint is active, print the name of the active compiler") \ 2443 \ 2444 diagnostic(bool, CIPrintCompileQueue, false, \ 2445 "display the contents of the compile queue whenever a " \ 2446 "compilation is enqueued") \ 2447 \ 2448 develop(bool, CIPrintRequests, false, \ 2449 "display every request for compilation") \ 2450 \ 2451 product(bool, CITime, false, \ 2452 "collect timing information for compilation") \ 2453 \ 2454 develop(bool, CITimeVerbose, false, \ 2455 "be more verbose in compilation timings") \ 2456 \ 2457 develop(bool, CITimeEach, false, \ 2458 "display timing information after each successful compilation") \ 2459 \ 2460 develop(bool, CICountOSR, false, \ 2461 "use a separate counter when assigning ids to osr compilations") \ 2462 \ 2463 develop(bool, CICompileNatives, true, \ 2464 "compile native methods if supported by the compiler") \ 2465 \ 2466 develop_pd(bool, CICompileOSR, \ 2467 "compile on stack replacement methods if supported by the " \ 2468 "compiler") \ 2469 \ 2470 develop(bool, CIPrintMethodCodes, false, \ 2471 "print method bytecodes of the compiled code") \ 2472 \ 2473 develop(bool, CIPrintTypeFlow, false, \ 2474 "print the results of ciTypeFlow analysis") \ 2475 \ 2476 develop(bool, CITraceTypeFlow, false, \ 2477 "detailed per-bytecode tracing of ciTypeFlow analysis") \ 2478 \ 2479 develop(intx, OSROnlyBCI, -1, \ 2480 "OSR only at this bci. Negative values mean exclude that bci") \ 2481 \ 2482 /* compiler */ \ 2483 \ 2484 /* notice: the max range value here is max_jint, not max_intx */ \ 2485 /* because of overflow issue */ \ 2486 product(intx, CICompilerCount, CI_COMPILER_COUNT, \ 2487 "Number of compiler threads to run") \ 2488 range(0, max_jint) \ 2489 constraint(CICompilerCountConstraintFunc, AtParse) \ 2490 \ 2491 product(intx, CompilationPolicyChoice, 0, \ 2492 "which compilation policy (0-3)") \ 2493 range(0, 3) \ 2494 \ 2495 develop(bool, UseStackBanging, true, \ 2496 "use stack banging for stack overflow checks (required for " \ 2497 "proper StackOverflow handling; disable only to measure cost " \ 2498 "of stackbanging)") \ 2499 \ 2500 develop(bool, UseStrictFP, true, \ 2501 "use strict fp if modifier strictfp is set") \ 2502 \ 2503 develop(bool, GenerateSynchronizationCode, true, \ 2504 "generate locking/unlocking code for synchronized methods and " \ 2505 "monitors") \ 2506 \ 2507 develop(bool, GenerateCompilerNullChecks, true, \ 2508 "Generate explicit null checks for loads/stores/calls") \ 2509 \ 2510 develop(bool, GenerateRangeChecks, true, \ 2511 "Generate range checks for array accesses") \ 2512 \ 2513 develop_pd(bool, ImplicitNullChecks, \ 2514 "Generate code for implicit null checks") \ 2515 \ 2516 product_pd(bool, TrapBasedNullChecks, \ 2517 "Generate code for null checks that uses a cmp and trap " \ 2518 "instruction raising SIGTRAP. This is only used if an access to" \ 2519 "null (+offset) will not raise a SIGSEGV, i.e.," \ 2520 "ImplicitNullChecks don't work (PPC64).") \ 2521 \ 2522 product(bool, PrintSafepointStatistics, false, \ 2523 "Print statistics about safepoint synchronization") \ 2524 \ 2525 product(intx, PrintSafepointStatisticsCount, 300, \ 2526 "Total number of safepoint statistics collected " \ 2527 "before printing them out") \ 2528 range(1, max_intx) \ 2529 \ 2530 product(intx, PrintSafepointStatisticsTimeout, -1, \ 2531 "Print safepoint statistics only when safepoint takes " \ 2532 "more than PrintSafepointSatisticsTimeout in millis") \ 2533 LP64_ONLY(range(-1, max_intx/MICROUNITS)) \ 2534 NOT_LP64(range(-1, max_intx)) \ 2535 \ 2536 product(bool, Inline, true, \ 2537 "Enable inlining") \ 2538 \ 2539 product(bool, ClipInlining, true, \ 2540 "Clip inlining if aggregate method exceeds DesiredMethodLimit") \ 2541 \ 2542 develop(bool, UseCHA, true, \ 2543 "Enable CHA") \ 2544 \ 2545 product(bool, UseTypeProfile, true, \ 2546 "Check interpreter profile for historically monomorphic calls") \ 2547 \ 2548 diagnostic(bool, PrintInlining, false, \ 2549 "Print inlining optimizations") \ 2550 \ 2551 product(bool, UsePopCountInstruction, false, \ 2552 "Use population count instruction") \ 2553 \ 2554 develop(bool, EagerInitialization, false, \ 2555 "Eagerly initialize classes if possible") \ 2556 \ 2557 diagnostic(bool, LogTouchedMethods, false, \ 2558 "Log methods which have been ever touched in runtime") \ 2559 \ 2560 diagnostic(bool, PrintTouchedMethodsAtExit, false, \ 2561 "Print all methods that have been ever touched in runtime") \ 2562 \ 2563 develop(bool, TraceMethodReplacement, false, \ 2564 "Print when methods are replaced do to recompilation") \ 2565 \ 2566 develop(bool, PrintMethodFlushing, false, \ 2567 "Print the nmethods being flushed") \ 2568 \ 2569 diagnostic(bool, PrintMethodFlushingStatistics, false, \ 2570 "print statistics about method flushing") \ 2571 \ 2572 diagnostic(intx, HotMethodDetectionLimit, 100000, \ 2573 "Number of compiled code invocations after which " \ 2574 "the method is considered as hot by the flusher") \ 2575 range(1, max_jint) \ 2576 \ 2577 diagnostic(intx, MinPassesBeforeFlush, 10, \ 2578 "Minimum number of sweeper passes before an nmethod " \ 2579 "can be flushed") \ 2580 range(0, max_intx) \ 2581 \ 2582 product(bool, UseCodeAging, true, \ 2583 "Insert counter to detect warm methods") \ 2584 \ 2585 diagnostic(bool, StressCodeAging, false, \ 2586 "Start with counters compiled in") \ 2587 \ 2588 develop(bool, UseRelocIndex, false, \ 2589 "Use an index to speed random access to relocations") \ 2590 \ 2591 develop(bool, StressCodeBuffers, false, \ 2592 "Exercise code buffer expansion and other rare state changes") \ 2593 \ 2594 diagnostic(bool, DebugNonSafepoints, trueInDebug, \ 2595 "Generate extra debugging information for non-safepoints in " \ 2596 "nmethods") \ 2597 \ 2598 product(bool, PrintVMOptions, false, \ 2599 "Print flags that appeared on the command line") \ 2600 \ 2601 product(bool, IgnoreUnrecognizedVMOptions, false, \ 2602 "Ignore unrecognized VM options") \ 2603 \ 2604 product(bool, PrintCommandLineFlags, false, \ 2605 "Print flags specified on command line or set by ergonomics") \ 2606 \ 2607 product(bool, PrintFlagsInitial, false, \ 2608 "Print all VM flags before argument processing and exit VM") \ 2609 \ 2610 product(bool, PrintFlagsFinal, false, \ 2611 "Print all VM flags after argument and ergonomic processing") \ 2612 \ 2613 notproduct(bool, PrintFlagsWithComments, false, \ 2614 "Print all VM flags with default values and descriptions and " \ 2615 "exit") \ 2616 \ 2617 product(bool, PrintFlagsRanges, false, \ 2618 "Print VM flags and their ranges and exit VM") \ 2619 \ 2620 diagnostic(bool, SerializeVMOutput, true, \ 2621 "Use a mutex to serialize output to tty and LogFile") \ 2622 \ 2623 diagnostic(bool, DisplayVMOutput, true, \ 2624 "Display all VM output on the tty, independently of LogVMOutput") \ 2625 \ 2626 diagnostic(bool, LogVMOutput, false, \ 2627 "Save VM output to LogFile") \ 2628 \ 2629 diagnostic(ccstr, LogFile, NULL, \ 2630 "If LogVMOutput or LogCompilation is on, save VM output to " \ 2631 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\ 2632 \ 2633 product(ccstr, ErrorFile, NULL, \ 2634 "If an error occurs, save the error data to this file " \ 2635 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \ 2636 \ 2637 product(bool, DisplayVMOutputToStderr, false, \ 2638 "If DisplayVMOutput is true, display all VM output to stderr") \ 2639 \ 2640 product(bool, DisplayVMOutputToStdout, false, \ 2641 "If DisplayVMOutput is true, display all VM output to stdout") \ 2642 \ 2643 product(bool, UseHeavyMonitors, false, \ 2644 "use heavyweight instead of lightweight Java monitors") \ 2645 \ 2646 product(bool, PrintStringTableStatistics, false, \ 2647 "print statistics about the StringTable and SymbolTable") \ 2648 \ 2649 diagnostic(bool, VerifyStringTableAtExit, false, \ 2650 "verify StringTable contents at exit") \ 2651 \ 2652 notproduct(bool, PrintSymbolTableSizeHistogram, false, \ 2653 "print histogram of the symbol table") \ 2654 \ 2655 notproduct(bool, ExitVMOnVerifyError, false, \ 2656 "standard exit from VM if bytecode verify error " \ 2657 "(only in debug mode)") \ 2658 \ 2659 diagnostic(ccstr, AbortVMOnException, NULL, \ 2660 "Call fatal if this exception is thrown. Example: " \ 2661 "java -XX:AbortVMOnException=java.lang.NullPointerException Foo") \ 2662 \ 2663 diagnostic(ccstr, AbortVMOnExceptionMessage, NULL, \ 2664 "Call fatal if the exception pointed by AbortVMOnException " \ 2665 "has this message") \ 2666 \ 2667 develop(bool, DebugVtables, false, \ 2668 "add debugging code to vtable dispatch") \ 2669 \ 2670 notproduct(bool, PrintVtableStats, false, \ 2671 "print vtables stats at end of run") \ 2672 \ 2673 develop(bool, TraceCreateZombies, false, \ 2674 "trace creation of zombie nmethods") \ 2675 \ 2676 notproduct(bool, IgnoreLockingAssertions, false, \ 2677 "disable locking assertions (for speed)") \ 2678 \ 2679 product(bool, RangeCheckElimination, true, \ 2680 "Eliminate range checks") \ 2681 \ 2682 develop_pd(bool, UncommonNullCast, \ 2683 "track occurrences of null in casts; adjust compiler tactics") \ 2684 \ 2685 develop(bool, TypeProfileCasts, true, \ 2686 "treat casts like calls for purposes of type profiling") \ 2687 \ 2688 develop(bool, DelayCompilationDuringStartup, true, \ 2689 "Delay invoking the compiler until main application class is " \ 2690 "loaded") \ 2691 \ 2692 develop(bool, CompileTheWorld, false, \ 2693 "Compile all methods in all classes in bootstrap class path " \ 2694 "(stress test)") \ 2695 \ 2696 develop(bool, CompileTheWorldPreloadClasses, true, \ 2697 "Preload all classes used by a class before start loading") \ 2698 \ 2699 notproduct(intx, CompileTheWorldSafepointInterval, 100, \ 2700 "Force a safepoint every n compiles so sweeper can keep up") \ 2701 \ 2702 develop(bool, FillDelaySlots, true, \ 2703 "Fill delay slots (on SPARC only)") \ 2704 \ 2705 develop(bool, TimeLivenessAnalysis, false, \ 2706 "Time computation of bytecode liveness analysis") \ 2707 \ 2708 develop(bool, TraceLivenessGen, false, \ 2709 "Trace the generation of liveness analysis information") \ 2710 \ 2711 notproduct(bool, TraceLivenessQuery, false, \ 2712 "Trace queries of liveness analysis information") \ 2713 \ 2714 notproduct(bool, CollectIndexSetStatistics, false, \ 2715 "Collect information about IndexSets") \ 2716 \ 2717 develop(bool, UseLoopSafepoints, true, \ 2718 "Generate Safepoint nodes in every loop") \ 2719 \ 2720 develop(intx, FastAllocateSizeLimit, 128*K, \ 2721 /* Note: This value is zero mod 1<<13 for a cheap sparc set. */ \ 2722 "Inline allocations larger than this in doublewords must go slow")\ 2723 \ 2724 product(bool, AggressiveOpts, false, \ 2725 "Enable aggressive optimizations - see arguments.cpp") \ 2726 \ 2727 product_pd(bool, CompactStrings, \ 2728 "Enable Strings to use single byte chars in backing store") \ 2729 \ 2730 product_pd(uintx, TypeProfileLevel, \ 2731 "=XYZ, with Z: Type profiling of arguments at call; " \ 2732 "Y: Type profiling of return value at call; " \ 2733 "X: Type profiling of parameters to methods; " \ 2734 "X, Y and Z in 0=off ; 1=jsr292 only; 2=all methods") \ 2735 constraint(TypeProfileLevelConstraintFunc, AfterErgo) \ 2736 \ 2737 product(intx, TypeProfileArgsLimit, 2, \ 2738 "max number of call arguments to consider for type profiling") \ 2739 range(0, 16) \ 2740 \ 2741 product(intx, TypeProfileParmsLimit, 2, \ 2742 "max number of incoming parameters to consider for type profiling"\ 2743 ", -1 for all") \ 2744 range(-1, 64) \ 2745 \ 2746 /* statistics */ \ 2747 develop(bool, CountCompiledCalls, false, \ 2748 "Count method invocations") \ 2749 \ 2750 notproduct(bool, CountRuntimeCalls, false, \ 2751 "Count VM runtime calls") \ 2752 \ 2753 develop(bool, CountJNICalls, false, \ 2754 "Count jni method invocations") \ 2755 \ 2756 notproduct(bool, CountJVMCalls, false, \ 2757 "Count jvm method invocations") \ 2758 \ 2759 notproduct(bool, CountRemovableExceptions, false, \ 2760 "Count exceptions that could be replaced by branches due to " \ 2761 "inlining") \ 2762 \ 2763 notproduct(bool, ICMissHistogram, false, \ 2764 "Produce histogram of IC misses") \ 2765 \ 2766 /* interpreter */ \ 2767 product_pd(bool, RewriteBytecodes, \ 2768 "Allow rewriting of bytecodes (bytecodes are not immutable)") \ 2769 \ 2770 product_pd(bool, RewriteFrequentPairs, \ 2771 "Rewrite frequently used bytecode pairs into a single bytecode") \ 2772 \ 2773 diagnostic(bool, PrintInterpreter, false, \ 2774 "Print the generated interpreter code") \ 2775 \ 2776 product(bool, UseInterpreter, true, \ 2777 "Use interpreter for non-compiled methods") \ 2778 \ 2779 develop(bool, UseFastSignatureHandlers, true, \ 2780 "Use fast signature handlers for native calls") \ 2781 \ 2782 product(bool, UseLoopCounter, true, \ 2783 "Increment invocation counter on backward branch") \ 2784 \ 2785 product_pd(bool, UseOnStackReplacement, \ 2786 "Use on stack replacement, calls runtime if invoc. counter " \ 2787 "overflows in loop") \ 2788 \ 2789 notproduct(bool, TraceOnStackReplacement, false, \ 2790 "Trace on stack replacement") \ 2791 \ 2792 product_pd(bool, PreferInterpreterNativeStubs, \ 2793 "Use always interpreter stubs for native methods invoked via " \ 2794 "interpreter") \ 2795 \ 2796 develop(bool, CountBytecodes, false, \ 2797 "Count number of bytecodes executed") \ 2798 \ 2799 develop(bool, PrintBytecodeHistogram, false, \ 2800 "Print histogram of the executed bytecodes") \ 2801 \ 2802 develop(bool, PrintBytecodePairHistogram, false, \ 2803 "Print histogram of the executed bytecode pairs") \ 2804 \ 2805 diagnostic(bool, PrintSignatureHandlers, false, \ 2806 "Print code generated for native method signature handlers") \ 2807 \ 2808 develop(bool, VerifyOops, false, \ 2809 "Do plausibility checks for oops") \ 2810 \ 2811 develop(bool, CheckUnhandledOops, false, \ 2812 "Check for unhandled oops in VM code") \ 2813 \ 2814 develop(bool, VerifyJNIFields, trueInDebug, \ 2815 "Verify jfieldIDs for instance fields") \ 2816 \ 2817 notproduct(bool, VerifyJNIEnvThread, false, \ 2818 "Verify JNIEnv.thread == Thread::current() when entering VM " \ 2819 "from JNI") \ 2820 \ 2821 develop(bool, VerifyFPU, false, \ 2822 "Verify FPU state (check for NaN's, etc.)") \ 2823 \ 2824 develop(bool, VerifyThread, false, \ 2825 "Watch the thread register for corruption (SPARC only)") \ 2826 \ 2827 develop(bool, VerifyActivationFrameSize, false, \ 2828 "Verify that activation frame didn't become smaller than its " \ 2829 "minimal size") \ 2830 \ 2831 develop(bool, TraceFrequencyInlining, false, \ 2832 "Trace frequency based inlining") \ 2833 \ 2834 develop_pd(bool, InlineIntrinsics, \ 2835 "Inline intrinsics that can be statically resolved") \ 2836 \ 2837 product_pd(bool, ProfileInterpreter, \ 2838 "Profile at the bytecode level during interpretation") \ 2839 \ 2840 develop(bool, TraceProfileInterpreter, false, \ 2841 "Trace profiling at the bytecode level during interpretation. " \ 2842 "This outputs the profiling information collected to improve " \ 2843 "jit compilation.") \ 2844 \ 2845 develop_pd(bool, ProfileTraps, \ 2846 "Profile deoptimization traps at the bytecode level") \ 2847 \ 2848 product(intx, ProfileMaturityPercentage, 20, \ 2849 "number of method invocations/branches (expressed as % of " \ 2850 "CompileThreshold) before using the method's profile") \ 2851 range(0, 100) \ 2852 \ 2853 diagnostic(bool, PrintMethodData, false, \ 2854 "Print the results of +ProfileInterpreter at end of run") \ 2855 \ 2856 develop(bool, VerifyDataPointer, trueInDebug, \ 2857 "Verify the method data pointer during interpreter profiling") \ 2858 \ 2859 develop(bool, VerifyCompiledCode, false, \ 2860 "Include miscellaneous runtime verifications in nmethod code; " \ 2861 "default off because it disturbs nmethod size heuristics") \ 2862 \ 2863 notproduct(bool, CrashGCForDumpingJavaThread, false, \ 2864 "Manually make GC thread crash then dump java stack trace; " \ 2865 "Test only") \ 2866 \ 2867 /* compilation */ \ 2868 product(bool, UseCompiler, true, \ 2869 "Use Just-In-Time compilation") \ 2870 \ 2871 develop(bool, TraceCompilationPolicy, false, \ 2872 "Trace compilation policy") \ 2873 \ 2874 develop(bool, TimeCompilationPolicy, false, \ 2875 "Time the compilation policy") \ 2876 \ 2877 product(bool, UseCounterDecay, true, \ 2878 "Adjust recompilation counters") \ 2879 \ 2880 develop(intx, CounterHalfLifeTime, 30, \ 2881 "Half-life time of invocation counters (in seconds)") \ 2882 \ 2883 develop(intx, CounterDecayMinIntervalLength, 500, \ 2884 "The minimum interval (in milliseconds) between invocation of " \ 2885 "CounterDecay") \ 2886 \ 2887 product(bool, AlwaysCompileLoopMethods, false, \ 2888 "When using recompilation, never interpret methods " \ 2889 "containing loops") \ 2890 \ 2891 product(bool, DontCompileHugeMethods, true, \ 2892 "Do not compile methods > HugeMethodLimit") \ 2893 \ 2894 /* Bytecode escape analysis estimation. */ \ 2895 product(bool, EstimateArgEscape, true, \ 2896 "Analyze bytecodes to estimate escape state of arguments") \ 2897 \ 2898 product(intx, BCEATraceLevel, 0, \ 2899 "How much tracing to do of bytecode escape analysis estimates " \ 2900 "(0-3)") \ 2901 range(0, 3) \ 2902 \ 2903 product(intx, MaxBCEAEstimateLevel, 5, \ 2904 "Maximum number of nested calls that are analyzed by BC EA") \ 2905 range(0, max_jint) \ 2906 \ 2907 product(intx, MaxBCEAEstimateSize, 150, \ 2908 "Maximum bytecode size of a method to be analyzed by BC EA") \ 2909 range(0, max_jint) \ 2910 \ 2911 product(intx, AllocatePrefetchStyle, 1, \ 2912 "0 = no prefetch, " \ 2913 "1 = prefetch instructions for each allocation, " \ 2914 "2 = use TLAB watermark to gate allocation prefetch, " \ 2915 "3 = use BIS instruction on Sparc for allocation prefetch") \ 2916 range(0, 3) \ 2917 \ 2918 product(intx, AllocatePrefetchDistance, -1, \ 2919 "Distance to prefetch ahead of allocation pointer. " \ 2920 "-1: use system-specific value (automatically determined") \ 2921 constraint(AllocatePrefetchDistanceConstraintFunc, AfterMemoryInit)\ 2922 \ 2923 product(intx, AllocatePrefetchLines, 3, \ 2924 "Number of lines to prefetch ahead of array allocation pointer") \ 2925 range(1, 64) \ 2926 \ 2927 product(intx, AllocateInstancePrefetchLines, 1, \ 2928 "Number of lines to prefetch ahead of instance allocation " \ 2929 "pointer") \ 2930 range(1, 64) \ 2931 \ 2932 product(intx, AllocatePrefetchStepSize, 16, \ 2933 "Step size in bytes of sequential prefetch instructions") \ 2934 range(1, 512) \ 2935 constraint(AllocatePrefetchStepSizeConstraintFunc,AfterMemoryInit)\ 2936 \ 2937 product(intx, AllocatePrefetchInstr, 0, \ 2938 "Prefetch instruction to prefetch ahead of allocation pointer") \ 2939 constraint(AllocatePrefetchInstrConstraintFunc, AfterErgo) \ 2940 \ 2941 /* deoptimization */ \ 2942 develop(bool, TraceDeoptimization, false, \ 2943 "Trace deoptimization") \ 2944 \ 2945 develop(bool, PrintDeoptimizationDetails, false, \ 2946 "Print more information about deoptimization") \ 2947 \ 2948 develop(bool, DebugDeoptimization, false, \ 2949 "Tracing various information while debugging deoptimization") \ 2950 \ 2951 product(intx, SelfDestructTimer, 0, \ 2952 "Will cause VM to terminate after a given time (in minutes) " \ 2953 "(0 means off)") \ 2954 range(0, max_intx) \ 2955 \ 2956 product(intx, MaxJavaStackTraceDepth, 1024, \ 2957 "The maximum number of lines in the stack trace for Java " \ 2958 "exceptions (0 means all)") \ 2959 range(0, max_jint/2) \ 2960 \ 2961 develop(bool, TraceStackWalk, false, \ 2962 "Trace stack walking") \ 2963 \ 2964 product(bool, MemberNameInStackFrame, true, \ 2965 "Use MemberName in StackFrame") \ 2966 \ 2967 /* notice: the max range value here is max_jint, not max_intx */ \ 2968 /* because of overflow issue */ \ 2969 NOT_EMBEDDED(diagnostic(intx, GuaranteedSafepointInterval, 1000, \ 2970 "Guarantee a safepoint (at least) every so many milliseconds " \ 2971 "(0 means none)")) \ 2972 NOT_EMBEDDED(range(0, max_jint)) \ 2973 \ 2974 EMBEDDED_ONLY(product(intx, GuaranteedSafepointInterval, 0, \ 2975 "Guarantee a safepoint (at least) every so many milliseconds " \ 2976 "(0 means none)")) \ 2977 EMBEDDED_ONLY(range(0, max_jint)) \ 2978 \ 2979 product(intx, SafepointTimeoutDelay, 10000, \ 2980 "Delay in milliseconds for option SafepointTimeout") \ 2981 LP64_ONLY(range(0, max_intx/MICROUNITS)) \ 2982 NOT_LP64(range(0, max_intx)) \ 2983 \ 2984 product(intx, NmethodSweepActivity, 10, \ 2985 "Removes cold nmethods from code cache if > 0. Higher values " \ 2986 "result in more aggressive sweeping") \ 2987 range(0, 2000) \ 2988 \ 2989 notproduct(bool, LogSweeper, false, \ 2990 "Keep a ring buffer of sweeper activity") \ 2991 \ 2992 notproduct(intx, SweeperLogEntries, 1024, \ 2993 "Number of records in the ring buffer of sweeper activity") \ 2994 \ 2995 notproduct(intx, MemProfilingInterval, 500, \ 2996 "Time between each invocation of the MemProfiler") \ 2997 \ 2998 develop(intx, MallocCatchPtr, -1, \ 2999 "Hit breakpoint when mallocing/freeing this pointer") \ 3000 \ 3001 notproduct(ccstrlist, SuppressErrorAt, "", \ 3002 "List of assertions (file:line) to muzzle") \ 3003 \ 3004 develop(intx, StackPrintLimit, 100, \ 3005 "number of stack frames to print in VM-level stack dump") \ 3006 \ 3007 notproduct(intx, MaxElementPrintSize, 256, \ 3008 "maximum number of elements to print") \ 3009 \ 3010 notproduct(intx, MaxSubklassPrintSize, 4, \ 3011 "maximum number of subklasses to print when printing klass") \ 3012 \ 3013 product(intx, MaxInlineLevel, 9, \ 3014 "maximum number of nested calls that are inlined") \ 3015 range(0, max_jint) \ 3016 \ 3017 product(intx, MaxRecursiveInlineLevel, 1, \ 3018 "maximum number of nested recursive calls that are inlined") \ 3019 range(0, max_jint) \ 3020 \ 3021 develop(intx, MaxForceInlineLevel, 100, \ 3022 "maximum number of nested calls that are forced for inlining " \ 3023 "(using CompileCommand or marked w/ @ForceInline)") \ 3024 range(0, max_jint) \ 3025 \ 3026 product_pd(intx, InlineSmallCode, \ 3027 "Only inline already compiled methods if their code size is " \ 3028 "less than this") \ 3029 range(0, max_jint) \ 3030 \ 3031 product(intx, MaxInlineSize, 35, \ 3032 "The maximum bytecode size of a method to be inlined") \ 3033 range(0, max_jint) \ 3034 \ 3035 product_pd(intx, FreqInlineSize, \ 3036 "The maximum bytecode size of a frequent method to be inlined") \ 3037 range(0, max_jint) \ 3038 \ 3039 product(intx, MaxTrivialSize, 6, \ 3040 "The maximum bytecode size of a trivial method to be inlined") \ 3041 range(0, max_jint) \ 3042 \ 3043 product(intx, MinInliningThreshold, 250, \ 3044 "The minimum invocation count a method needs to have to be " \ 3045 "inlined") \ 3046 range(0, max_jint) \ 3047 \ 3048 develop(intx, MethodHistogramCutoff, 100, \ 3049 "The cutoff value for method invocation histogram (+CountCalls)") \ 3050 \ 3051 diagnostic(intx, ProfilerNumberOfInterpretedMethods, 25, \ 3052 "Number of interpreted methods to show in profile") \ 3053 \ 3054 diagnostic(intx, ProfilerNumberOfCompiledMethods, 25, \ 3055 "Number of compiled methods to show in profile") \ 3056 \ 3057 diagnostic(intx, ProfilerNumberOfStubMethods, 25, \ 3058 "Number of stub methods to show in profile") \ 3059 \ 3060 diagnostic(intx, ProfilerNumberOfRuntimeStubNodes, 25, \ 3061 "Number of runtime stub nodes to show in profile") \ 3062 \ 3063 product(intx, ProfileIntervalsTicks, 100, \ 3064 "Number of ticks between printing of interval profile " \ 3065 "(+ProfileIntervals)") \ 3066 range(0, max_intx) \ 3067 \ 3068 notproduct(intx, ScavengeALotInterval, 1, \ 3069 "Interval between which scavenge will occur with +ScavengeALot") \ 3070 \ 3071 notproduct(intx, FullGCALotInterval, 1, \ 3072 "Interval between which full gc will occur with +FullGCALot") \ 3073 \ 3074 notproduct(intx, FullGCALotStart, 0, \ 3075 "For which invocation to start FullGCAlot") \ 3076 \ 3077 notproduct(intx, FullGCALotDummies, 32*K, \ 3078 "Dummy object allocated with +FullGCALot, forcing all objects " \ 3079 "to move") \ 3080 \ 3081 develop(intx, DontYieldALotInterval, 10, \ 3082 "Interval between which yields will be dropped (milliseconds)") \ 3083 \ 3084 develop(intx, MinSleepInterval, 1, \ 3085 "Minimum sleep() interval (milliseconds) when " \ 3086 "ConvertSleepToYield is off (used for Solaris)") \ 3087 \ 3088 develop(intx, ProfilerPCTickThreshold, 15, \ 3089 "Number of ticks in a PC buckets to be a hotspot") \ 3090 \ 3091 notproduct(intx, DeoptimizeALotInterval, 5, \ 3092 "Number of exits until DeoptimizeALot kicks in") \ 3093 \ 3094 notproduct(intx, ZombieALotInterval, 5, \ 3095 "Number of exits until ZombieALot kicks in") \ 3096 \ 3097 diagnostic(intx, MallocVerifyInterval, 0, \ 3098 "If non-zero, verify C heap after every N calls to " \ 3099 "malloc/realloc/free") \ 3100 range(0, max_intx) \ 3101 \ 3102 diagnostic(intx, MallocVerifyStart, 0, \ 3103 "If non-zero, start verifying C heap after Nth call to " \ 3104 "malloc/realloc/free") \ 3105 range(0, max_intx) \ 3106 \ 3107 diagnostic(uintx, MallocMaxTestWords, 0, \ 3108 "If non-zero, maximum number of words that malloc/realloc can " \ 3109 "allocate (for testing only)") \ 3110 range(0, max_uintx) \ 3111 \ 3112 product(intx, TypeProfileWidth, 2, \ 3113 "Number of receiver types to record in call/cast profile") \ 3114 range(0, 8) \ 3115 \ 3116 experimental(intx, MethodProfileWidth, 0, \ 3117 "Number of methods to record in call profile") \ 3118 \ 3119 develop(intx, BciProfileWidth, 2, \ 3120 "Number of return bci's to record in ret profile") \ 3121 \ 3122 product(intx, PerMethodRecompilationCutoff, 400, \ 3123 "After recompiling N times, stay in the interpreter (-1=>'Inf')") \ 3124 range(-1, max_intx) \ 3125 \ 3126 product(intx, PerBytecodeRecompilationCutoff, 200, \ 3127 "Per-BCI limit on repeated recompilation (-1=>'Inf')") \ 3128 range(-1, max_intx) \ 3129 \ 3130 product(intx, PerMethodTrapLimit, 100, \ 3131 "Limit on traps (of one kind) in a method (includes inlines)") \ 3132 range(0, max_jint) \ 3133 \ 3134 experimental(intx, PerMethodSpecTrapLimit, 5000, \ 3135 "Limit on speculative traps (of one kind) in a method " \ 3136 "(includes inlines)") \ 3137 range(0, max_jint) \ 3138 \ 3139 product(intx, PerBytecodeTrapLimit, 4, \ 3140 "Limit on traps (of one kind) at a particular BCI") \ 3141 range(0, max_jint) \ 3142 \ 3143 experimental(intx, SpecTrapLimitExtraEntries, 3, \ 3144 "Extra method data trap entries for speculation") \ 3145 \ 3146 develop(intx, InlineFrequencyRatio, 20, \ 3147 "Ratio of call site execution to caller method invocation") \ 3148 range(0, max_jint) \ 3149 \ 3150 develop_pd(intx, InlineFrequencyCount, \ 3151 "Count of call site execution necessary to trigger frequent " \ 3152 "inlining") \ 3153 range(0, max_jint) \ 3154 \ 3155 develop(intx, InlineThrowCount, 50, \ 3156 "Force inlining of interpreted methods that throw this often") \ 3157 range(0, max_jint) \ 3158 \ 3159 develop(intx, InlineThrowMaxSize, 200, \ 3160 "Force inlining of throwing methods smaller than this") \ 3161 range(0, max_jint) \ 3162 \ 3163 develop(intx, ProfilerNodeSize, 1024, \ 3164 "Size in K to allocate for the Profile Nodes of each thread") \ 3165 range(0, 1024) \ 3166 \ 3167 /* gc parameters */ \ 3168 product(size_t, InitialHeapSize, 0, \ 3169 "Initial heap size (in bytes); zero means use ergonomics") \ 3170 constraint(InitialHeapSizeConstraintFunc,AfterErgo) \ 3171 \ 3172 product(size_t, MaxHeapSize, ScaleForWordSize(96*M), \ 3173 "Maximum heap size (in bytes)") \ 3174 constraint(MaxHeapSizeConstraintFunc,AfterErgo) \ 3175 \ 3176 product(size_t, OldSize, ScaleForWordSize(4*M), \ 3177 "Initial tenured generation size (in bytes)") \ 3178 range(0, max_uintx) \ 3179 \ 3180 product(size_t, NewSize, ScaleForWordSize(1*M), \ 3181 "Initial new generation size (in bytes)") \ 3182 constraint(NewSizeConstraintFunc,AfterErgo) \ 3183 \ 3184 product(size_t, MaxNewSize, max_uintx, \ 3185 "Maximum new generation size (in bytes), max_uintx means set " \ 3186 "ergonomically") \ 3187 range(0, max_uintx) \ 3188 \ 3189 product_pd(size_t, HeapBaseMinAddress, \ 3190 "OS specific low limit for heap base address") \ 3191 constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \ 3192 \ 3193 product(size_t, PretenureSizeThreshold, 0, \ 3194 "Maximum size in bytes of objects allocated in DefNew " \ 3195 "generation; zero means no maximum") \ 3196 range(0, max_uintx) \ 3197 \ 3198 product(size_t, MinTLABSize, 2*K, \ 3199 "Minimum allowed TLAB size (in bytes)") \ 3200 range(1, max_uintx/2) \ 3201 constraint(MinTLABSizeConstraintFunc,AfterMemoryInit) \ 3202 \ 3203 product(size_t, TLABSize, 0, \ 3204 "Starting TLAB size (in bytes); zero means set ergonomically") \ 3205 constraint(TLABSizeConstraintFunc,AfterMemoryInit) \ 3206 \ 3207 product(size_t, YoungPLABSize, 4096, \ 3208 "Size of young gen promotion LAB's (in HeapWords)") \ 3209 constraint(YoungPLABSizeConstraintFunc,AfterMemoryInit) \ 3210 \ 3211 product(size_t, OldPLABSize, 1024, \ 3212 "Size of old gen promotion LAB's (in HeapWords), or Number " \ 3213 "of blocks to attempt to claim when refilling CMS LAB's") \ 3214 constraint(OldPLABSizeConstraintFunc,AfterMemoryInit) \ 3215 \ 3216 product(uintx, TLABAllocationWeight, 35, \ 3217 "Allocation averaging weight") \ 3218 range(0, 100) \ 3219 \ 3220 /* Limit the lower bound of this flag to 1 as it is used */ \ 3221 /* in a division expression. */ \ 3222 product(uintx, TLABWasteTargetPercent, 1, \ 3223 "Percentage of Eden that can be wasted") \ 3224 range(1, 100) \ 3225 \ 3226 product(uintx, TLABRefillWasteFraction, 64, \ 3227 "Maximum TLAB waste at a refill (internal fragmentation)") \ 3228 range(1, max_juint) \ 3229 \ 3230 product(uintx, TLABWasteIncrement, 4, \ 3231 "Increment allowed waste at slow allocation") \ 3232 range(0, max_jint) \ 3233 constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \ 3234 \ 3235 product(uintx, SurvivorRatio, 8, \ 3236 "Ratio of eden/survivor space size") \ 3237 range(1, max_uintx-2) \ 3238 constraint(SurvivorRatioConstraintFunc,AfterMemoryInit) \ 3239 \ 3240 product(uintx, NewRatio, 2, \ 3241 "Ratio of old/new generation sizes") \ 3242 range(0, max_uintx-1) \ 3243 \ 3244 product_pd(size_t, NewSizeThreadIncrease, \ 3245 "Additional size added to desired new generation size per " \ 3246 "non-daemon thread (in bytes)") \ 3247 range(0, max_uintx) \ 3248 \ 3249 product_pd(size_t, MetaspaceSize, \ 3250 "Initial threshold (in bytes) at which a garbage collection " \ 3251 "is done to reduce Metaspace usage") \ 3252 constraint(MetaspaceSizeConstraintFunc,AfterErgo) \ 3253 \ 3254 product(size_t, MaxMetaspaceSize, max_uintx, \ 3255 "Maximum size of Metaspaces (in bytes)") \ 3256 constraint(MaxMetaspaceSizeConstraintFunc,AfterErgo) \ 3257 \ 3258 product(size_t, CompressedClassSpaceSize, 1*G, \ 3259 "Maximum size of class area in Metaspace when compressed " \ 3260 "class pointers are used") \ 3261 range(1*M, 3*G) \ 3262 \ 3263 manageable(uintx, MinHeapFreeRatio, 40, \ 3264 "The minimum percentage of heap free after GC to avoid expansion."\ 3265 " For most GCs this applies to the old generation. In G1 and" \ 3266 " ParallelGC it applies to the whole heap.") \ 3267 range(0, 100) \ 3268 constraint(MinHeapFreeRatioConstraintFunc,AfterErgo) \ 3269 \ 3270 manageable(uintx, MaxHeapFreeRatio, 70, \ 3271 "The maximum percentage of heap free after GC to avoid shrinking."\ 3272 " For most GCs this applies to the old generation. In G1 and" \ 3273 " ParallelGC it applies to the whole heap.") \ 3274 range(0, 100) \ 3275 constraint(MaxHeapFreeRatioConstraintFunc,AfterErgo) \ 3276 \ 3277 product(bool, ShrinkHeapInSteps, true, \ 3278 "When disabled, informs the GC to shrink the java heap directly" \ 3279 " to the target size at the next full GC rather than requiring" \ 3280 " smaller steps during multiple full GCs.") \ 3281 \ 3282 product(intx, SoftRefLRUPolicyMSPerMB, 1000, \ 3283 "Number of milliseconds per MB of free space in the heap") \ 3284 range(0, max_intx) \ 3285 constraint(SoftRefLRUPolicyMSPerMBConstraintFunc,AfterMemoryInit) \ 3286 \ 3287 product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \ 3288 "The minimum change in heap space due to GC (in bytes)") \ 3289 range(0, max_uintx) \ 3290 \ 3291 product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \ 3292 "The minimum expansion of Metaspace (in bytes)") \ 3293 range(0, max_uintx) \ 3294 \ 3295 product(uintx, MaxMetaspaceFreeRatio, 70, \ 3296 "The maximum percentage of Metaspace free after GC to avoid " \ 3297 "shrinking") \ 3298 range(0, 100) \ 3299 constraint(MaxMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3300 \ 3301 product(uintx, MinMetaspaceFreeRatio, 40, \ 3302 "The minimum percentage of Metaspace free after GC to avoid " \ 3303 "expansion") \ 3304 range(0, 99) \ 3305 constraint(MinMetaspaceFreeRatioConstraintFunc,AfterErgo) \ 3306 \ 3307 product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \ 3308 "The maximum expansion of Metaspace without full GC (in bytes)") \ 3309 range(0, max_uintx) \ 3310 \ 3311 product(uintx, QueuedAllocationWarningCount, 0, \ 3312 "Number of times an allocation that queues behind a GC " \ 3313 "will retry before printing a warning") \ 3314 range(0, max_uintx) \ 3315 \ 3316 diagnostic(uintx, VerifyGCStartAt, 0, \ 3317 "GC invoke count where +VerifyBefore/AfterGC kicks in") \ 3318 range(0, max_uintx) \ 3319 \ 3320 diagnostic(intx, VerifyGCLevel, 0, \ 3321 "Generation level at which to start +VerifyBefore/AfterGC") \ 3322 range(0, 1) \ 3323 \ 3324 product(uintx, MaxTenuringThreshold, 15, \ 3325 "Maximum value for tenuring threshold") \ 3326 range(0, markOopDesc::max_age + 1) \ 3327 constraint(MaxTenuringThresholdConstraintFunc,AfterErgo) \ 3328 \ 3329 product(uintx, InitialTenuringThreshold, 7, \ 3330 "Initial value for tenuring threshold") \ 3331 range(0, markOopDesc::max_age + 1) \ 3332 constraint(InitialTenuringThresholdConstraintFunc,AfterErgo) \ 3333 \ 3334 product(uintx, TargetSurvivorRatio, 50, \ 3335 "Desired percentage of survivor space used after scavenge") \ 3336 range(0, 100) \ 3337 \ 3338 product(uintx, MarkSweepDeadRatio, 5, \ 3339 "Percentage (0-100) of the old gen allowed as dead wood. " \ 3340 "Serial mark sweep treats this as both the minimum and maximum " \ 3341 "value. " \ 3342 "CMS uses this value only if it falls back to mark sweep. " \ 3343 "Par compact uses a variable scale based on the density of the " \ 3344 "generation and treats this as the maximum value when the heap " \ 3345 "is either completely full or completely empty. Par compact " \ 3346 "also has a smaller default value; see arguments.cpp.") \ 3347 range(0, 100) \ 3348 \ 3349 product(uint, MarkSweepAlwaysCompactCount, 4, \ 3350 "How often should we fully compact the heap (ignoring the dead " \ 3351 "space parameters)") \ 3352 range(1, max_juint) \ 3353 \ 3354 develop(uintx, GCExpandToAllocateDelayMillis, 0, \ 3355 "Delay between expansion and allocation (in milliseconds)") \ 3356 \ 3357 develop(uintx, GCWorkerDelayMillis, 0, \ 3358 "Delay in scheduling GC workers (in milliseconds)") \ 3359 \ 3360 product(intx, DeferThrSuspendLoopCount, 4000, \ 3361 "(Unstable) Number of times to iterate in safepoint loop " \ 3362 "before blocking VM threads ") \ 3363 range(-1, max_jint-1) \ 3364 \ 3365 product(intx, DeferPollingPageLoopCount, -1, \ 3366 "(Unsafe,Unstable) Number of iterations in safepoint loop " \ 3367 "before changing safepoint polling page to RO ") \ 3368 range(-1, max_jint-1) \ 3369 \ 3370 product(intx, SafepointSpinBeforeYield, 2000, "(Unstable)") \ 3371 range(0, max_intx) \ 3372 \ 3373 product(bool, PSChunkLargeArrays, true, \ 3374 "Process large arrays in chunks") \ 3375 \ 3376 product(uintx, GCDrainStackTargetSize, 64, \ 3377 "Number of entries we will try to leave on the stack " \ 3378 "during parallel gc") \ 3379 range(0, max_juint) \ 3380 \ 3381 /* stack parameters */ \ 3382 product_pd(intx, StackYellowPages, \ 3383 "Number of yellow zone (recoverable overflows) pages of size " \ 3384 "4KB. If pages are bigger yellow zone is aligned up.") \ 3385 range(MIN_STACK_YELLOW_PAGES, (DEFAULT_STACK_YELLOW_PAGES+5)) \ 3386 \ 3387 product_pd(intx, StackRedPages, \ 3388 "Number of red zone (unrecoverable overflows) pages of size " \ 3389 "4KB. If pages are bigger red zone is aligned up.") \ 3390 range(MIN_STACK_RED_PAGES, (DEFAULT_STACK_RED_PAGES+2)) \ 3391 \ 3392 product_pd(intx, StackReservedPages, \ 3393 "Number of reserved zone (reserved to annotated methods) pages" \ 3394 " of size 4KB. If pages are bigger reserved zone is aligned up.") \ 3395 range(MIN_STACK_RESERVED_PAGES, (DEFAULT_STACK_RESERVED_PAGES+10))\ 3396 \ 3397 product(bool, RestrictReservedStack, true, \ 3398 "Restrict @ReservedStackAccess to trusted classes") \ 3399 \ 3400 /* greater stack shadow pages can't generate instruction to bang stack */ \ 3401 product_pd(intx, StackShadowPages, \ 3402 "Number of shadow zone (for overflow checking) pages of size " \ 3403 "4KB. If pages are bigger shadow zone is aligned up. " \ 3404 "This should exceed the depth of the VM and native call stack.") \ 3405 range(MIN_STACK_SHADOW_PAGES, (DEFAULT_STACK_SHADOW_PAGES+30)) \ 3406 \ 3407 product_pd(intx, ThreadStackSize, \ 3408 "Thread Stack Size (in Kbytes)") \ 3409 range(0, (max_intx-os::vm_page_size())/(1 * K)) \ 3410 \ 3411 product_pd(intx, VMThreadStackSize, \ 3412 "Non-Java Thread Stack Size (in Kbytes)") \ 3413 range(0, max_intx/(1 * K)) \ 3414 \ 3415 product_pd(intx, CompilerThreadStackSize, \ 3416 "Compiler Thread Stack Size (in Kbytes)") \ 3417 range(0, max_intx/(1 * K)) \ 3418 \ 3419 develop_pd(size_t, JVMInvokeMethodSlack, \ 3420 "Stack space (bytes) required for JVM_InvokeMethod to complete") \ 3421 \ 3422 /* code cache parameters */ \ 3423 /* ppc64/tiered compilation has large code-entry alignment. */ \ 3424 develop(uintx, CodeCacheSegmentSize, \ 3425 64 PPC64_ONLY(+64) NOT_PPC64(TIERED_ONLY(+64)), \ 3426 "Code cache segment size (in bytes) - smallest unit of " \ 3427 "allocation") \ 3428 range(1, 1024) \ 3429 constraint(CodeCacheSegmentSizeConstraintFunc, AfterErgo) \ 3430 \ 3431 develop_pd(intx, CodeEntryAlignment, \ 3432 "Code entry alignment for generated code (in bytes)") \ 3433 constraint(CodeEntryAlignmentConstraintFunc, AfterErgo) \ 3434 \ 3435 product_pd(intx, OptoLoopAlignment, \ 3436 "Align inner loops to zero relative to this modulus") \ 3437 range(1, 16) \ 3438 constraint(OptoLoopAlignmentConstraintFunc, AfterErgo) \ 3439 \ 3440 product_pd(uintx, InitialCodeCacheSize, \ 3441 "Initial code cache size (in bytes)") \ 3442 range(0, max_uintx) \ 3443 \ 3444 develop_pd(uintx, CodeCacheMinimumUseSpace, \ 3445 "Minimum code cache size (in bytes) required to start VM.") \ 3446 range(0, max_uintx) \ 3447 \ 3448 product(bool, SegmentedCodeCache, false, \ 3449 "Use a segmented code cache") \ 3450 \ 3451 product_pd(uintx, ReservedCodeCacheSize, \ 3452 "Reserved code cache size (in bytes) - maximum code cache size") \ 3453 range(0, max_uintx) \ 3454 \ 3455 product_pd(uintx, NonProfiledCodeHeapSize, \ 3456 "Size of code heap with non-profiled methods (in bytes)") \ 3457 range(0, max_uintx) \ 3458 \ 3459 product_pd(uintx, ProfiledCodeHeapSize, \ 3460 "Size of code heap with profiled methods (in bytes)") \ 3461 range(0, max_uintx) \ 3462 \ 3463 product_pd(uintx, NonNMethodCodeHeapSize, \ 3464 "Size of code heap with non-nmethods (in bytes)") \ 3465 range(0, max_uintx) \ 3466 \ 3467 product_pd(uintx, CodeCacheExpansionSize, \ 3468 "Code cache expansion size (in bytes)") \ 3469 range(0, max_uintx) \ 3470 \ 3471 develop_pd(uintx, CodeCacheMinBlockLength, \ 3472 "Minimum number of segments in a code cache block") \ 3473 range(1, 100) \ 3474 \ 3475 notproduct(bool, ExitOnFullCodeCache, false, \ 3476 "Exit the VM if we fill the code cache") \ 3477 \ 3478 product(bool, UseCodeCacheFlushing, true, \ 3479 "Remove cold/old nmethods from the code cache") \ 3480 \ 3481 product(uintx, StartAggressiveSweepingAt, 10, \ 3482 "Start aggressive sweeping if X[%] of the code cache is free." \ 3483 "Segmented code cache: X[%] of the non-profiled heap." \ 3484 "Non-segmented code cache: X[%] of the total code cache") \ 3485 range(0, 100) \ 3486 \ 3487 /* interpreter debugging */ \ 3488 develop(intx, BinarySwitchThreshold, 5, \ 3489 "Minimal number of lookupswitch entries for rewriting to binary " \ 3490 "switch") \ 3491 \ 3492 develop(intx, StopInterpreterAt, 0, \ 3493 "Stop interpreter execution at specified bytecode number") \ 3494 \ 3495 develop(intx, TraceBytecodesAt, 0, \ 3496 "Trace bytecodes starting with specified bytecode number") \ 3497 \ 3498 /* compiler interface */ \ 3499 develop(intx, CIStart, 0, \ 3500 "The id of the first compilation to permit") \ 3501 \ 3502 develop(intx, CIStop, max_jint, \ 3503 "The id of the last compilation to permit") \ 3504 \ 3505 develop(intx, CIStartOSR, 0, \ 3506 "The id of the first osr compilation to permit " \ 3507 "(CICountOSR must be on)") \ 3508 \ 3509 develop(intx, CIStopOSR, max_jint, \ 3510 "The id of the last osr compilation to permit " \ 3511 "(CICountOSR must be on)") \ 3512 \ 3513 develop(intx, CIBreakAtOSR, -1, \ 3514 "The id of osr compilation to break at") \ 3515 \ 3516 develop(intx, CIBreakAt, -1, \ 3517 "The id of compilation to break at") \ 3518 \ 3519 product(ccstrlist, CompileOnly, "", \ 3520 "List of methods (pkg/class.name) to restrict compilation to") \ 3521 \ 3522 product(ccstr, CompileCommandFile, NULL, \ 3523 "Read compiler commands from this file [.hotspot_compiler]") \ 3524 \ 3525 diagnostic(ccstr, CompilerDirectivesFile, NULL, \ 3526 "Read compiler directives from this file") \ 3527 \ 3528 product(ccstrlist, CompileCommand, "", \ 3529 "Prepend to .hotspot_compiler; e.g. log,java/lang/String.<init>") \ 3530 \ 3531 develop(bool, ReplayCompiles, false, \ 3532 "Enable replay of compilations from ReplayDataFile") \ 3533 \ 3534 product(ccstr, ReplayDataFile, NULL, \ 3535 "File containing compilation replay information" \ 3536 "[default: ./replay_pid%p.log] (%p replaced with pid)") \ 3537 \ 3538 product(ccstr, InlineDataFile, NULL, \ 3539 "File containing inlining replay information" \ 3540 "[default: ./inline_pid%p.log] (%p replaced with pid)") \ 3541 \ 3542 develop(intx, ReplaySuppressInitializers, 2, \ 3543 "Control handling of class initialization during replay: " \ 3544 "0 - don't do anything special; " \ 3545 "1 - treat all class initializers as empty; " \ 3546 "2 - treat class initializers for application classes as empty; " \ 3547 "3 - allow all class initializers to run during bootstrap but " \ 3548 " pretend they are empty after starting replay") \ 3549 range(0, 3) \ 3550 \ 3551 develop(bool, ReplayIgnoreInitErrors, false, \ 3552 "Ignore exceptions thrown during initialization for replay") \ 3553 \ 3554 product(bool, DumpReplayDataOnError, true, \ 3555 "Record replay data for crashing compiler threads") \ 3556 \ 3557 product(bool, CICompilerCountPerCPU, false, \ 3558 "1 compiler thread for log(N CPUs)") \ 3559 \ 3560 develop(intx, CIFireOOMAt, -1, \ 3561 "Fire OutOfMemoryErrors throughout CI for testing the compiler " \ 3562 "(non-negative value throws OOM after this many CI accesses " \ 3563 "in each compile)") \ 3564 notproduct(intx, CICrashAt, -1, \ 3565 "id of compilation to trigger assert in compiler thread for " \ 3566 "the purpose of testing, e.g. generation of replay data") \ 3567 notproduct(bool, CIObjectFactoryVerify, false, \ 3568 "enable potentially expensive verification in ciObjectFactory") \ 3569 \ 3570 /* Priorities */ \ 3571 product_pd(bool, UseThreadPriorities, "Use native thread priorities") \ 3572 \ 3573 product(intx, ThreadPriorityPolicy, 0, \ 3574 "0 : Normal. "\ 3575 " VM chooses priorities that are appropriate for normal "\ 3576 " applications. On Solaris NORM_PRIORITY and above are mapped "\ 3577 " to normal native priority. Java priorities below " \ 3578 " NORM_PRIORITY map to lower native priority values. On "\ 3579 " Windows applications are allowed to use higher native "\ 3580 " priorities. However, with ThreadPriorityPolicy=0, VM will "\ 3581 " not use the highest possible native priority, "\ 3582 " THREAD_PRIORITY_TIME_CRITICAL, as it may interfere with "\ 3583 " system threads. On Linux thread priorities are ignored "\ 3584 " because the OS does not support static priority in "\ 3585 " SCHED_OTHER scheduling class which is the only choice for "\ 3586 " non-root, non-realtime applications. "\ 3587 "1 : Aggressive. "\ 3588 " Java thread priorities map over to the entire range of "\ 3589 " native thread priorities. Higher Java thread priorities map "\ 3590 " to higher native thread priorities. This policy should be "\ 3591 " used with care, as sometimes it can cause performance "\ 3592 " degradation in the application and/or the entire system. On "\ 3593 " Linux this policy requires root privilege.") \ 3594 range(0, 1) \ 3595 \ 3596 product(bool, ThreadPriorityVerbose, false, \ 3597 "Print priority changes") \ 3598 \ 3599 product(intx, CompilerThreadPriority, -1, \ 3600 "The native priority at which compiler threads should run " \ 3601 "(-1 means no change)") \ 3602 range(min_jint, max_jint) \ 3603 constraint(CompilerThreadPriorityConstraintFunc, AfterErgo) \ 3604 \ 3605 product(intx, VMThreadPriority, -1, \ 3606 "The native priority at which the VM thread should run " \ 3607 "(-1 means no change)") \ 3608 range(-1, 127) \ 3609 \ 3610 product(bool, CompilerThreadHintNoPreempt, true, \ 3611 "(Solaris only) Give compiler threads an extra quanta") \ 3612 \ 3613 product(bool, VMThreadHintNoPreempt, false, \ 3614 "(Solaris only) Give VM thread an extra quanta") \ 3615 \ 3616 product(intx, JavaPriority1_To_OSPriority, -1, \ 3617 "Map Java priorities to OS priorities") \ 3618 range(-1, 127) \ 3619 \ 3620 product(intx, JavaPriority2_To_OSPriority, -1, \ 3621 "Map Java priorities to OS priorities") \ 3622 range(-1, 127) \ 3623 \ 3624 product(intx, JavaPriority3_To_OSPriority, -1, \ 3625 "Map Java priorities to OS priorities") \ 3626 range(-1, 127) \ 3627 \ 3628 product(intx, JavaPriority4_To_OSPriority, -1, \ 3629 "Map Java priorities to OS priorities") \ 3630 range(-1, 127) \ 3631 \ 3632 product(intx, JavaPriority5_To_OSPriority, -1, \ 3633 "Map Java priorities to OS priorities") \ 3634 range(-1, 127) \ 3635 \ 3636 product(intx, JavaPriority6_To_OSPriority, -1, \ 3637 "Map Java priorities to OS priorities") \ 3638 range(-1, 127) \ 3639 \ 3640 product(intx, JavaPriority7_To_OSPriority, -1, \ 3641 "Map Java priorities to OS priorities") \ 3642 range(-1, 127) \ 3643 \ 3644 product(intx, JavaPriority8_To_OSPriority, -1, \ 3645 "Map Java priorities to OS priorities") \ 3646 range(-1, 127) \ 3647 \ 3648 product(intx, JavaPriority9_To_OSPriority, -1, \ 3649 "Map Java priorities to OS priorities") \ 3650 range(-1, 127) \ 3651 \ 3652 product(intx, JavaPriority10_To_OSPriority,-1, \ 3653 "Map Java priorities to OS priorities") \ 3654 range(-1, 127) \ 3655 \ 3656 experimental(bool, UseCriticalJavaThreadPriority, false, \ 3657 "Java thread priority 10 maps to critical scheduling priority") \ 3658 \ 3659 experimental(bool, UseCriticalCompilerThreadPriority, false, \ 3660 "Compiler thread(s) run at critical scheduling priority") \ 3661 \ 3662 experimental(bool, UseCriticalCMSThreadPriority, false, \ 3663 "ConcurrentMarkSweep thread runs at critical scheduling priority")\ 3664 \ 3665 /* compiler debugging */ \ 3666 notproduct(intx, CompileTheWorldStartAt, 1, \ 3667 "First class to consider when using +CompileTheWorld") \ 3668 \ 3669 notproduct(intx, CompileTheWorldStopAt, max_jint, \ 3670 "Last class to consider when using +CompileTheWorld") \ 3671 \ 3672 develop(intx, NewCodeParameter, 0, \ 3673 "Testing Only: Create a dedicated integer parameter before " \ 3674 "putback") \ 3675 \ 3676 /* new oopmap storage allocation */ \ 3677 develop(intx, MinOopMapAllocation, 8, \ 3678 "Minimum number of OopMap entries in an OopMapSet") \ 3679 \ 3680 /* Background Compilation */ \ 3681 develop(intx, LongCompileThreshold, 50, \ 3682 "Used with +TraceLongCompiles") \ 3683 \ 3684 /* recompilation */ \ 3685 product_pd(intx, CompileThreshold, \ 3686 "number of interpreted method invocations before (re-)compiling") \ 3687 constraint(CompileThresholdConstraintFunc, AfterErgo) \ 3688 \ 3689 product(double, CompileThresholdScaling, 1.0, \ 3690 "Factor to control when first compilation happens " \ 3691 "(both with and without tiered compilation): " \ 3692 "values greater than 1.0 delay counter overflow, " \ 3693 "values between 0 and 1.0 rush counter overflow, " \ 3694 "value of 1.0 leaves compilation thresholds unchanged " \ 3695 "value of 0.0 is equivalent to -Xint. " \ 3696 "" \ 3697 "Flag can be set as per-method option. " \ 3698 "If a value is specified for a method, compilation thresholds " \ 3699 "for that method are scaled by both the value of the global flag "\ 3700 "and the value of the per-method flag.") \ 3701 range(0.0, DBL_MAX) \ 3702 \ 3703 product(intx, Tier0InvokeNotifyFreqLog, 7, \ 3704 "Interpreter (tier 0) invocation notification frequency") \ 3705 range(0, 30) \ 3706 \ 3707 product(intx, Tier2InvokeNotifyFreqLog, 11, \ 3708 "C1 without MDO (tier 2) invocation notification frequency") \ 3709 range(0, 30) \ 3710 \ 3711 product(intx, Tier3InvokeNotifyFreqLog, 10, \ 3712 "C1 with MDO profiling (tier 3) invocation notification " \ 3713 "frequency") \ 3714 range(0, 30) \ 3715 \ 3716 product(intx, Tier23InlineeNotifyFreqLog, 20, \ 3717 "Inlinee invocation (tiers 2 and 3) notification frequency") \ 3718 range(0, 30) \ 3719 \ 3720 product(intx, Tier0BackedgeNotifyFreqLog, 10, \ 3721 "Interpreter (tier 0) invocation notification frequency") \ 3722 range(0, 30) \ 3723 \ 3724 product(intx, Tier2BackedgeNotifyFreqLog, 14, \ 3725 "C1 without MDO (tier 2) invocation notification frequency") \ 3726 range(0, 30) \ 3727 \ 3728 product(intx, Tier3BackedgeNotifyFreqLog, 13, \ 3729 "C1 with MDO profiling (tier 3) invocation notification " \ 3730 "frequency") \ 3731 range(0, 30) \ 3732 \ 3733 product(intx, Tier2CompileThreshold, 0, \ 3734 "threshold at which tier 2 compilation is invoked") \ 3735 range(0, max_jint) \ 3736 \ 3737 product(intx, Tier2BackEdgeThreshold, 0, \ 3738 "Back edge threshold at which tier 2 compilation is invoked") \ 3739 range(0, max_jint) \ 3740 \ 3741 product(intx, Tier3InvocationThreshold, 200, \ 3742 "Compile if number of method invocations crosses this " \ 3743 "threshold") \ 3744 range(0, max_jint) \ 3745 \ 3746 product(intx, Tier3MinInvocationThreshold, 100, \ 3747 "Minimum invocation to compile at tier 3") \ 3748 range(0, max_jint) \ 3749 \ 3750 product(intx, Tier3CompileThreshold, 2000, \ 3751 "Threshold at which tier 3 compilation is invoked (invocation " \ 3752 "minimum must be satisfied)") \ 3753 range(0, max_jint) \ 3754 \ 3755 product(intx, Tier3BackEdgeThreshold, 60000, \ 3756 "Back edge threshold at which tier 3 OSR compilation is invoked") \ 3757 range(0, max_jint) \ 3758 \ 3759 product(intx, Tier4InvocationThreshold, 5000, \ 3760 "Compile if number of method invocations crosses this " \ 3761 "threshold") \ 3762 range(0, max_jint) \ 3763 \ 3764 product(intx, Tier4MinInvocationThreshold, 600, \ 3765 "Minimum invocation to compile at tier 4") \ 3766 range(0, max_jint) \ 3767 \ 3768 product(intx, Tier4CompileThreshold, 15000, \ 3769 "Threshold at which tier 4 compilation is invoked (invocation " \ 3770 "minimum must be satisfied") \ 3771 range(0, max_jint) \ 3772 \ 3773 product(intx, Tier4BackEdgeThreshold, 40000, \ 3774 "Back edge threshold at which tier 4 OSR compilation is invoked") \ 3775 range(0, max_jint) \ 3776 \ 3777 product(intx, Tier3DelayOn, 5, \ 3778 "If C2 queue size grows over this amount per compiler thread " \ 3779 "stop compiling at tier 3 and start compiling at tier 2") \ 3780 range(0, max_jint) \ 3781 \ 3782 product(intx, Tier3DelayOff, 2, \ 3783 "If C2 queue size is less than this amount per compiler thread " \ 3784 "allow methods compiled at tier 2 transition to tier 3") \ 3785 range(0, max_jint) \ 3786 \ 3787 product(intx, Tier3LoadFeedback, 5, \ 3788 "Tier 3 thresholds will increase twofold when C1 queue size " \ 3789 "reaches this amount per compiler thread") \ 3790 range(0, max_jint) \ 3791 \ 3792 product(intx, Tier4LoadFeedback, 3, \ 3793 "Tier 4 thresholds will increase twofold when C2 queue size " \ 3794 "reaches this amount per compiler thread") \ 3795 range(0, max_jint) \ 3796 \ 3797 product(intx, TieredCompileTaskTimeout, 50, \ 3798 "Kill compile task if method was not used within " \ 3799 "given timeout in milliseconds") \ 3800 range(0, max_intx) \ 3801 \ 3802 product(intx, TieredStopAtLevel, 4, \ 3803 "Stop at given compilation level") \ 3804 range(0, 4) \ 3805 \ 3806 product(intx, Tier0ProfilingStartPercentage, 200, \ 3807 "Start profiling in interpreter if the counters exceed tier 3 " \ 3808 "thresholds by the specified percentage") \ 3809 range(0, max_jint) \ 3810 \ 3811 product(uintx, IncreaseFirstTierCompileThresholdAt, 50, \ 3812 "Increase the compile threshold for C1 compilation if the code " \ 3813 "cache is filled by the specified percentage") \ 3814 range(0, 99) \ 3815 \ 3816 product(intx, TieredRateUpdateMinTime, 1, \ 3817 "Minimum rate sampling interval (in milliseconds)") \ 3818 range(0, max_intx) \ 3819 \ 3820 product(intx, TieredRateUpdateMaxTime, 25, \ 3821 "Maximum rate sampling interval (in milliseconds)") \ 3822 range(0, max_intx) \ 3823 \ 3824 product_pd(bool, TieredCompilation, \ 3825 "Enable tiered compilation") \ 3826 \ 3827 product(bool, PrintTieredEvents, false, \ 3828 "Print tiered events notifications") \ 3829 \ 3830 product_pd(intx, OnStackReplacePercentage, \ 3831 "NON_TIERED number of method invocations/branches (expressed as " \ 3832 "% of CompileThreshold) before (re-)compiling OSR code") \ 3833 constraint(OnStackReplacePercentageConstraintFunc, AfterErgo) \ 3834 \ 3835 product(intx, InterpreterProfilePercentage, 33, \ 3836 "NON_TIERED number of method invocations/branches (expressed as " \ 3837 "% of CompileThreshold) before profiling in the interpreter") \ 3838 range(0, 100) \ 3839 \ 3840 develop(intx, MaxRecompilationSearchLength, 10, \ 3841 "The maximum number of frames to inspect when searching for " \ 3842 "recompilee") \ 3843 \ 3844 develop(intx, MaxInterpretedSearchLength, 3, \ 3845 "The maximum number of interpreted frames to skip when searching "\ 3846 "for recompilee") \ 3847 \ 3848 develop(intx, DesiredMethodLimit, 8000, \ 3849 "The desired maximum method size (in bytecodes) after inlining") \ 3850 \ 3851 develop(intx, HugeMethodLimit, 8000, \ 3852 "Don't compile methods larger than this if " \ 3853 "+DontCompileHugeMethods") \ 3854 \ 3855 /* New JDK 1.4 reflection implementation */ \ 3856 \ 3857 develop(intx, FastSuperclassLimit, 8, \ 3858 "Depth of hardwired instanceof accelerator array") \ 3859 \ 3860 /* Properties for Java libraries */ \ 3861 \ 3862 product(size_t, MaxDirectMemorySize, 0, \ 3863 "Maximum total size of NIO direct-buffer allocations") \ 3864 range(0, (size_t)SIZE_MAX) \ 3865 \ 3866 /* Flags used for temporary code during development */ \ 3867 \ 3868 diagnostic(bool, UseNewCode, false, \ 3869 "Testing Only: Use the new version while testing") \ 3870 \ 3871 diagnostic(bool, UseNewCode2, false, \ 3872 "Testing Only: Use the new version while testing") \ 3873 \ 3874 diagnostic(bool, UseNewCode3, false, \ 3875 "Testing Only: Use the new version while testing") \ 3876 \ 3877 /* flags for performance data collection */ \ 3878 \ 3879 product(bool, UsePerfData, falseInEmbedded, \ 3880 "Flag to disable jvmstat instrumentation for performance testing "\ 3881 "and problem isolation purposes") \ 3882 \ 3883 product(bool, PerfDataSaveToFile, false, \ 3884 "Save PerfData memory to hsperfdata_<pid> file on exit") \ 3885 \ 3886 product(ccstr, PerfDataSaveFile, NULL, \ 3887 "Save PerfData memory to the specified absolute pathname. " \ 3888 "The string %p in the file name (if present) " \ 3889 "will be replaced by pid") \ 3890 \ 3891 product(intx, PerfDataSamplingInterval, 50, \ 3892 "Data sampling interval (in milliseconds)") \ 3893 range(PeriodicTask::min_interval, max_jint) \ 3894 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \ 3895 \ 3896 develop(bool, PerfTraceDataCreation, false, \ 3897 "Trace creation of Performance Data Entries") \ 3898 \ 3899 develop(bool, PerfTraceMemOps, false, \ 3900 "Trace PerfMemory create/attach/detach calls") \ 3901 \ 3902 product(bool, PerfDisableSharedMem, false, \ 3903 "Store performance data in standard memory") \ 3904 \ 3905 product(intx, PerfDataMemorySize, 32*K, \ 3906 "Size of performance data memory region. Will be rounded " \ 3907 "up to a multiple of the native os page size.") \ 3908 range(128, 32*64*K) \ 3909 \ 3910 product(intx, PerfMaxStringConstLength, 1024, \ 3911 "Maximum PerfStringConstant string length before truncation") \ 3912 range(32, 32*K) \ 3913 \ 3914 product(bool, PerfAllowAtExitRegistration, false, \ 3915 "Allow registration of atexit() methods") \ 3916 \ 3917 product(bool, PerfBypassFileSystemCheck, false, \ 3918 "Bypass Win32 file system criteria checks (Windows Only)") \ 3919 \ 3920 product(intx, UnguardOnExecutionViolation, 0, \ 3921 "Unguard page and retry on no-execute fault (Win32 only) " \ 3922 "0=off, 1=conservative, 2=aggressive") \ 3923 range(0, 2) \ 3924 \ 3925 /* Serviceability Support */ \ 3926 \ 3927 product(bool, ManagementServer, false, \ 3928 "Create JMX Management Server") \ 3929 \ 3930 product(bool, DisableAttachMechanism, false, \ 3931 "Disable mechanism that allows tools to attach to this VM") \ 3932 \ 3933 product(bool, StartAttachListener, false, \ 3934 "Always start Attach Listener at VM startup") \ 3935 \ 3936 manageable(bool, PrintConcurrentLocks, false, \ 3937 "Print java.util.concurrent locks in thread dump") \ 3938 \ 3939 product(bool, TransmitErrorReport, false, \ 3940 "Enable error report transmission on erroneous termination") \ 3941 \ 3942 product(ccstr, ErrorReportServer, NULL, \ 3943 "Override built-in error report server address") \ 3944 \ 3945 /* Shared spaces */ \ 3946 \ 3947 product(bool, UseSharedSpaces, true, \ 3948 "Use shared spaces for metadata") \ 3949 \ 3950 product(bool, VerifySharedSpaces, false, \ 3951 "Verify shared spaces (false for default archive, true for " \ 3952 "archive specified by -XX:SharedArchiveFile)") \ 3953 \ 3954 product(bool, RequireSharedSpaces, false, \ 3955 "Require shared spaces for metadata") \ 3956 \ 3957 product(bool, DumpSharedSpaces, false, \ 3958 "Special mode: JVM reads a class list, loads classes, builds " \ 3959 "shared spaces, and dumps the shared spaces to a file to be " \ 3960 "used in future JVM runs") \ 3961 \ 3962 product(bool, PrintSharedSpaces, false, \ 3963 "Print usage of shared spaces") \ 3964 \ 3965 product(bool, PrintSharedArchiveAndExit, false, \ 3966 "Print shared archive file contents") \ 3967 \ 3968 product(bool, PrintSharedDictionary, false, \ 3969 "If PrintSharedArchiveAndExit is true, also print the shared " \ 3970 "dictionary") \ 3971 \ 3972 product(size_t, SharedReadWriteSize, DEFAULT_SHARED_READ_WRITE_SIZE, \ 3973 "Size of read-write space for metadata (in bytes)") \ 3974 range(MIN_SHARED_READ_WRITE_SIZE, MAX_SHARED_READ_WRITE_SIZE) \ 3975 \ 3976 product(size_t, SharedReadOnlySize, DEFAULT_SHARED_READ_ONLY_SIZE, \ 3977 "Size of read-only space for metadata (in bytes)") \ 3978 range(MIN_SHARED_READ_ONLY_SIZE, MAX_SHARED_READ_ONLY_SIZE) \ 3979 \ 3980 product(size_t, SharedMiscDataSize, DEFAULT_SHARED_MISC_DATA_SIZE, \ 3981 "Size of the shared miscellaneous data area (in bytes)") \ 3982 range(MIN_SHARED_MISC_DATA_SIZE, MAX_SHARED_MISC_DATA_SIZE) \ 3983 \ 3984 product(size_t, SharedMiscCodeSize, DEFAULT_SHARED_MISC_CODE_SIZE, \ 3985 "Size of the shared miscellaneous code area (in bytes)") \ 3986 range(MIN_SHARED_MISC_CODE_SIZE, MAX_SHARED_MISC_CODE_SIZE) \ 3987 \ 3988 product(size_t, SharedBaseAddress, LP64_ONLY(32*G) \ 3989 NOT_LP64(LINUX_ONLY(2*G) NOT_LINUX(0)), \ 3990 "Address to allocate shared memory region for class data") \ 3991 range(0, SIZE_MAX) \ 3992 \ 3993 product(uintx, SharedSymbolTableBucketSize, 4, \ 3994 "Average number of symbols per bucket in shared table") \ 3995 range(2, 246) \ 3996 \ 3997 diagnostic(bool, IgnoreUnverifiableClassesDuringDump, false, \ 3998 "Do not quit -Xshare:dump even if we encounter unverifiable " \ 3999 "classes. Just exclude them from the shared dictionary.") \ 4000 \ 4001 diagnostic(bool, PrintMethodHandleStubs, false, \ 4002 "Print generated stub code for method handles") \ 4003 \ 4004 develop(bool, TraceMethodHandles, false, \ 4005 "trace internal method handle operations") \ 4006 \ 4007 diagnostic(bool, VerifyMethodHandles, trueInDebug, \ 4008 "perform extra checks when constructing method handles") \ 4009 \ 4010 diagnostic(bool, ShowHiddenFrames, false, \ 4011 "show method handle implementation frames (usually hidden)") \ 4012 \ 4013 experimental(bool, TrustFinalNonStaticFields, false, \ 4014 "trust final non-static declarations for constant folding") \ 4015 \ 4016 diagnostic(bool, FoldStableValues, true, \ 4017 "Optimize loads from stable fields (marked w/ @Stable)") \ 4018 \ 4019 develop(bool, TraceInvokeDynamic, false, \ 4020 "trace internal invoke dynamic operations") \ 4021 \ 4022 diagnostic(bool, PauseAtStartup, false, \ 4023 "Causes the VM to pause at startup time and wait for the pause " \ 4024 "file to be removed (default: ./vm.paused.<pid>)") \ 4025 \ 4026 diagnostic(ccstr, PauseAtStartupFile, NULL, \ 4027 "The file to create and for whose removal to await when pausing " \ 4028 "at startup. (default: ./vm.paused.<pid>)") \ 4029 \ 4030 diagnostic(bool, PauseAtExit, false, \ 4031 "Pause and wait for keypress on exit if a debugger is attached") \ 4032 \ 4033 product(bool, ExtendedDTraceProbes, false, \ 4034 "Enable performance-impacting dtrace probes") \ 4035 \ 4036 product(bool, DTraceMethodProbes, false, \ 4037 "Enable dtrace probes for method-entry and method-exit") \ 4038 \ 4039 product(bool, DTraceAllocProbes, false, \ 4040 "Enable dtrace probes for object allocation") \ 4041 \ 4042 product(bool, DTraceMonitorProbes, false, \ 4043 "Enable dtrace probes for monitor events") \ 4044 \ 4045 product(bool, RelaxAccessControlCheck, false, \ 4046 "Relax the access control checks in the verifier") \ 4047 \ 4048 product(uintx, StringTableSize, defaultStringTableSize, \ 4049 "Number of buckets in the interned String table") \ 4050 range(minimumStringTableSize, 111*defaultStringTableSize) \ 4051 \ 4052 experimental(uintx, SymbolTableSize, defaultSymbolTableSize, \ 4053 "Number of buckets in the JVM internal Symbol table") \ 4054 range(minimumSymbolTableSize, 111*defaultSymbolTableSize) \ 4055 \ 4056 product(bool, UseStringDeduplication, false, \ 4057 "Use string deduplication") \ 4058 \ 4059 product(uintx, StringDeduplicationAgeThreshold, 3, \ 4060 "A string must reach this age (or be promoted to an old region) " \ 4061 "to be considered for deduplication") \ 4062 range(1, markOopDesc::max_age) \ 4063 \ 4064 diagnostic(bool, StringDeduplicationResizeALot, false, \ 4065 "Force table resize every time the table is scanned") \ 4066 \ 4067 diagnostic(bool, StringDeduplicationRehashALot, false, \ 4068 "Force table rehash every time the table is scanned") \ 4069 \ 4070 diagnostic(bool, WhiteBoxAPI, false, \ 4071 "Enable internal testing APIs") \ 4072 \ 4073 experimental(intx, SurvivorAlignmentInBytes, 0, \ 4074 "Default survivor space alignment in bytes") \ 4075 constraint(SurvivorAlignmentInBytesConstraintFunc,AfterErgo) \ 4076 \ 4077 product(bool , AllowNonVirtualCalls, false, \ 4078 "Obey the ACC_SUPER flag and allow invokenonvirtual calls") \ 4079 \ 4080 product(ccstr, DumpLoadedClassList, NULL, \ 4081 "Dump the names all loaded classes, that could be stored into " \ 4082 "the CDS archive, in the specified file") \ 4083 \ 4084 product(ccstr, SharedClassListFile, NULL, \ 4085 "Override the default CDS class list") \ 4086 \ 4087 diagnostic(ccstr, SharedArchiveFile, NULL, \ 4088 "Override the default location of the CDS archive file") \ 4089 \ 4090 product(ccstr, ExtraSharedClassListFile, NULL, \ 4091 "Extra classlist for building the CDS archive file") \ 4092 \ 4093 experimental(size_t, ArrayAllocatorMallocLimit, \ 4094 SOLARIS_ONLY(64*K) NOT_SOLARIS((size_t)-1), \ 4095 "Allocation less than this value will be allocated " \ 4096 "using malloc. Larger allocations will use mmap.") \ 4097 \ 4098 experimental(bool, AlwaysAtomicAccesses, false, \ 4099 "Accesses to all variables should always be atomic") \ 4100 \ 4101 product(bool, EnableTracing, false, \ 4102 "Enable event-based tracing") \ 4103 \ 4104 product(bool, UseLockedTracing, false, \ 4105 "Use locked-tracing when doing event-based tracing") \ 4106 \ 4107 diagnostic(bool, UseUnalignedAccesses, false, \ 4108 "Use unaligned memory accesses in Unsafe") \ 4109 \ 4110 product_pd(bool, PreserveFramePointer, \ 4111 "Use the FP register for holding the frame pointer " \ 4112 "and not as a general purpose register.") \ 4113 \ 4114 diagnostic(bool, CheckIntrinsics, true, \ 4115 "When a class C is loaded, check that " \ 4116 "(1) all intrinsics defined by the VM for class C are present "\ 4117 "in the loaded class file and are marked with the " \ 4118 "@HotSpotIntrinsicCandidate annotation, that " \ 4119 "(2) there is an intrinsic registered for all loaded methods " \ 4120 "that are annotated with the @HotSpotIntrinsicCandidate " \ 4121 "annotation, and that " \ 4122 "(3) no orphan methods exist for class C (i.e., methods for " \ 4123 "which the VM declares an intrinsic but that are not declared "\ 4124 "in the loaded class C. " \ 4125 "Check (3) is available only in debug builds.") \ 4126 \ 4127 develop_pd(intx, InitArrayShortSize, \ 4128 "Threshold small size (in bytes) for clearing arrays. " \ 4129 "Anything this size or smaller may get converted to discrete " \ 4130 "scalar stores.") \ 4131 range(0, max_intx) \ 4132 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ 4133 \ 4134 diagnostic(bool, CompilerDirectivesIgnoreCompileCommands, false, \ 4135 "Disable backwards compatibility for compile commands.") \ 4136 \ 4137 diagnostic(bool, CompilerDirectivesPrint, false, \ 4138 "Print compiler directives on installation.") \ 4139 diagnostic(int, CompilerDirectivesLimit, 50, \ 4140 "Limit on number of compiler directives.") 4141 4142 4143/* 4144 * Macros for factoring of globals 4145 */ 4146 4147// Interface macros 4148#define DECLARE_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4149#define DECLARE_PD_PRODUCT_FLAG(type, name, doc) extern "C" type name; 4150#define DECLARE_DIAGNOSTIC_FLAG(type, name, value, doc) extern "C" type name; 4151#define DECLARE_EXPERIMENTAL_FLAG(type, name, value, doc) extern "C" type name; 4152#define DECLARE_MANAGEABLE_FLAG(type, name, value, doc) extern "C" type name; 4153#define DECLARE_PRODUCT_RW_FLAG(type, name, value, doc) extern "C" type name; 4154#ifdef PRODUCT 4155#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) const type name = value; 4156#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) const type name = pd_##name; 4157#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) const type name = value; 4158#else 4159#define DECLARE_DEVELOPER_FLAG(type, name, value, doc) extern "C" type name; 4160#define DECLARE_PD_DEVELOPER_FLAG(type, name, doc) extern "C" type name; 4161#define DECLARE_NOTPRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4162#endif // PRODUCT 4163// Special LP64 flags, product only needed for now. 4164#ifdef _LP64 4165#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) extern "C" type name; 4166#else 4167#define DECLARE_LP64_PRODUCT_FLAG(type, name, value, doc) const type name = value; 4168#endif // _LP64 4169 4170// Implementation macros 4171#define MATERIALIZE_PRODUCT_FLAG(type, name, value, doc) type name = value; 4172#define MATERIALIZE_PD_PRODUCT_FLAG(type, name, doc) type name = pd_##name; 4173#define MATERIALIZE_DIAGNOSTIC_FLAG(type, name, value, doc) type name = value; 4174#define MATERIALIZE_EXPERIMENTAL_FLAG(type, name, value, doc) type name = value; 4175#define MATERIALIZE_MANAGEABLE_FLAG(type, name, value, doc) type name = value; 4176#define MATERIALIZE_PRODUCT_RW_FLAG(type, name, value, doc) type name = value; 4177#ifdef PRODUCT 4178#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) 4179#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) 4180#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) 4181#else 4182#define MATERIALIZE_DEVELOPER_FLAG(type, name, value, doc) type name = value; 4183#define MATERIALIZE_PD_DEVELOPER_FLAG(type, name, doc) type name = pd_##name; 4184#define MATERIALIZE_NOTPRODUCT_FLAG(type, name, value, doc) type name = value; 4185#endif // PRODUCT 4186#ifdef _LP64 4187#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) type name = value; 4188#else 4189#define MATERIALIZE_LP64_PRODUCT_FLAG(type, name, value, doc) /* flag is constant */ 4190#endif // _LP64 4191 4192// Only materialize src code for range checking when required, ignore otherwise 4193#define IGNORE_RANGE(a, b) 4194// Only materialize src code for contraint checking when required, ignore otherwise 4195#define IGNORE_CONSTRAINT(func,type) 4196 4197RUNTIME_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4198 DECLARE_PD_DEVELOPER_FLAG, \ 4199 DECLARE_PRODUCT_FLAG, \ 4200 DECLARE_PD_PRODUCT_FLAG, \ 4201 DECLARE_DIAGNOSTIC_FLAG, \ 4202 DECLARE_EXPERIMENTAL_FLAG, \ 4203 DECLARE_NOTPRODUCT_FLAG, \ 4204 DECLARE_MANAGEABLE_FLAG, \ 4205 DECLARE_PRODUCT_RW_FLAG, \ 4206 DECLARE_LP64_PRODUCT_FLAG, \ 4207 IGNORE_RANGE, \ 4208 IGNORE_CONSTRAINT) 4209 4210RUNTIME_OS_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4211 DECLARE_PD_DEVELOPER_FLAG, \ 4212 DECLARE_PRODUCT_FLAG, \ 4213 DECLARE_PD_PRODUCT_FLAG, \ 4214 DECLARE_DIAGNOSTIC_FLAG, \ 4215 DECLARE_NOTPRODUCT_FLAG, \ 4216 IGNORE_RANGE, \ 4217 IGNORE_CONSTRAINT) 4218 4219ARCH_FLAGS(DECLARE_DEVELOPER_FLAG, \ 4220 DECLARE_PRODUCT_FLAG, \ 4221 DECLARE_DIAGNOSTIC_FLAG, \ 4222 DECLARE_EXPERIMENTAL_FLAG, \ 4223 DECLARE_NOTPRODUCT_FLAG, \ 4224 IGNORE_RANGE, \ 4225 IGNORE_CONSTRAINT) 4226 4227// Extensions 4228 4229#include "runtime/globals_ext.hpp" 4230 4231#endif // SHARE_VM_RUNTIME_GLOBALS_HPP 4232