111 const size_t minimumStringTableSize = 128;
112 const size_t defaultSymbolTableSize = 32768; // 2^15
113 const size_t minimumSymbolTableSize = 1024;
114
115 #ifdef _LP64
116 #define LP64_RUNTIME_FLAGS(develop, \
117 develop_pd, \
118 product, \
119 product_pd, \
120 range, \
121 constraint) \
122 \
123 product(bool, UseCompressedOops, false, \
124 "Use 32-bit object references in 64-bit VM. " \
125 "lp64_product means flag is always constant in 32 bit VM") \
126 \
127 product(bool, UseCompressedClassPointers, true, \
128 "Use 32-bit class pointers in 64-bit VM. " \
129 "lp64_product means flag is always constant in 32 bit VM") \
130 \
131 product(bool, UseCompactObjectHeaders, false, EXPERIMENTAL, \
132 "Use compact 64-bit object headers in 64-bit VM") \
133 \
134 product(int, ObjectAlignmentInBytes, 8, \
135 "Default object alignment in bytes, 8 is minimum") \
136 range(8, 256) \
137 constraint(ObjectAlignmentInBytesConstraintFunc, AtParse)
138
139 #else
140 // !_LP64
141
142 #define LP64_RUNTIME_FLAGS(develop, \
143 develop_pd, \
144 product, \
145 product_pd, \
146 range, \
147 constraint)
148 const bool UseCompressedOops = false;
149 const bool UseCompressedClassPointers = false;
150 const bool UseCompactObjectHeaders = false;
363 "Enables intrinsification of ArraysSupport.vectorizedHashCode()") \
364 \
365 product(bool, UseCopySignIntrinsic, false, DIAGNOSTIC, \
366 "Enables intrinsification of Math.copySign") \
367 \
368 product(bool, UseSignumIntrinsic, false, DIAGNOSTIC, \
369 "Enables intrinsification of Math.signum") \
370 \
371 product_pd(bool, DelayCompilerStubsGeneration, DIAGNOSTIC, \
372 "Use Compiler thread for compiler's stubs generation") \
373 \
374 product(ccstrlist, DisableIntrinsic, "", DIAGNOSTIC, \
375 "do not expand intrinsics whose (internal) names appear here") \
376 constraint(DisableIntrinsicConstraintFunc,AfterErgo) \
377 \
378 product(ccstrlist, ControlIntrinsic, "", DIAGNOSTIC, \
379 "Control intrinsics using a list of +/- (internal) names, " \
380 "separated by commas") \
381 constraint(ControlIntrinsicConstraintFunc,AfterErgo) \
382 \
383 develop(bool, TraceCallFixup, false, \
384 "Trace all call fixups") \
385 \
386 develop(bool, DeoptimizeALot, false, \
387 "Deoptimize at every exit from the runtime system") \
388 \
389 develop(ccstrlist, DeoptimizeOnlyAt, "", \
390 "A comma separated list of bcis to deoptimize at") \
391 \
392 develop(bool, DeoptimizeRandom, false, \
393 "Deoptimize random frames on random exit from the runtime system")\
394 \
395 develop(bool, ZombieALot, false, \
396 "Create non-entrant nmethods at exit from the runtime system") \
397 \
398 develop(bool, WalkStackALot, false, \
399 "Trace stack (no print) at every exit from the runtime system") \
400 \
401 develop(bool, DeoptimizeObjectsALot, false, \
402 "For testing purposes concurrent threads revert optimizations " \
1003 "Print all VM flags after argument and ergonomic processing") \
1004 \
1005 develop(bool, PrintFlagsWithComments, false, \
1006 "Print all VM flags with default values and descriptions and " \
1007 "exit") \
1008 \
1009 product(bool, PrintFlagsRanges, false, \
1010 "Print VM flags and their ranges") \
1011 \
1012 product(bool, SerializeVMOutput, true, DIAGNOSTIC, \
1013 "Use a mutex to serialize output to tty and LogFile") \
1014 \
1015 product(bool, DisplayVMOutput, true, DIAGNOSTIC, \
1016 "Display all VM output on the tty, independently of LogVMOutput") \
1017 \
1018 product(bool, LogVMOutput, false, DIAGNOSTIC, \
1019 "Save VM output to LogFile") \
1020 \
1021 product(ccstr, LogFile, nullptr, DIAGNOSTIC, \
1022 "If LogVMOutput or LogCompilation is on, save VM output to " \
1023 "this file [default: ./hotspot_pid%p.log] (%p replaced with pid)")\
1024 \
1025 product(ccstr, ErrorFile, nullptr, \
1026 "If an error occurs, save the error data to this file " \
1027 "[default: ./hs_err_pid%p.log] (%p replaced with pid)") \
1028 \
1029 product(bool, ExtensiveErrorReports, \
1030 PRODUCT_ONLY(false) NOT_PRODUCT(true), \
1031 "Error reports are more extensive.") \
1032 \
1033 product(bool, DisplayVMOutputToStderr, false, \
1034 "If DisplayVMOutput is true, display all VM output to stderr") \
1035 \
1036 product(bool, DisplayVMOutputToStdout, false, \
1037 "If DisplayVMOutput is true, display all VM output to stdout") \
1038 \
1039 product(bool, ErrorFileToStderr, false, \
1040 "If true, error data is printed to stderr instead of a file") \
1041 \
1042 product(bool, ErrorFileToStdout, false, \
1043 "If true, error data is printed to stdout instead of a file") \
1044 \
1045 develop(bool, VerifyHeavyMonitors, false, \
1046 "Checks that no stack locking happens when using " \
1047 "-XX:LockingMode=0 (LM_MONITOR)") \
1127 product(bool, UseInterpreter, true, \
1128 "Use interpreter for non-compiled methods") \
1129 \
1130 develop(bool, UseFastSignatureHandlers, true, \
1131 "Use fast signature handlers for native calls") \
1132 \
1133 product(bool, UseLoopCounter, true, \
1134 "Increment invocation counter on backward branch") \
1135 \
1136 product_pd(bool, UseOnStackReplacement, \
1137 "Use on stack replacement, calls runtime if invoc. counter " \
1138 "overflows in loop") \
1139 \
1140 develop(bool, TraceOnStackReplacement, false, \
1141 "Trace on stack replacement") \
1142 \
1143 product_pd(bool, PreferInterpreterNativeStubs, \
1144 "Use always interpreter stubs for native methods invoked via " \
1145 "interpreter") \
1146 \
1147 develop(bool, CountBytecodes, false, \
1148 "Count number of bytecodes executed") \
1149 \
1150 develop(bool, PrintBytecodeHistogram, false, \
1151 "Print histogram of the executed bytecodes") \
1152 \
1153 develop(bool, PrintBytecodePairHistogram, false, \
1154 "Print histogram of the executed bytecode pairs") \
1155 \
1156 product(bool, PrintSignatureHandlers, false, DIAGNOSTIC, \
1157 "Print code generated for native method signature handlers") \
1158 \
1159 develop(bool, VerifyOops, false, \
1160 "Do plausibility checks for oops") \
1161 \
1162 develop(bool, CheckUnhandledOops, false, \
1163 "Check for unhandled oops in VM code") \
1164 \
1165 develop(bool, VerifyJNIFields, trueInDebug, \
1166 "Verify jfieldIDs for instance fields") \
1167 \
1168 develop(bool, VerifyFPU, false, \
1169 "Verify FPU state (check for NaN's, etc.)") \
1170 \
1171 develop(bool, VerifyActivationFrameSize, false, \
1172 "Verify that activation frame didn't become smaller than its " \
1173 "minimal size") \
1174 \
1175 develop(bool, TraceFrequencyInlining, false, \
1176 "Trace frequency based inlining") \
1177 \
1178 develop_pd(bool, InlineIntrinsics, \
1179 "Use intrinsics in Interpreter that can be statically resolved") \
1180 \
1181 product_pd(bool, ProfileInterpreter, \
1182 "Profile at the bytecode level during interpretation") \
1183 \
1184 develop_pd(bool, ProfileTraps, \
1185 "Profile deoptimization traps at the bytecode level") \
1186 \
1187 product(intx, ProfileMaturityPercentage, 20, \
1188 "number of method invocations/branches (expressed as % of " \
1189 "CompileThreshold) before using the method's profile") \
1190 range(0, 100) \
1191 \
1192 product(bool, PrintMethodData, false, DIAGNOSTIC, \
1193 "Print the results of +ProfileInterpreter at end of run") \
1194 \
1195 develop(bool, VerifyDataPointer, trueInDebug, \
1196 "Verify the method data pointer during interpreter profiling") \
1197 \
1198 develop(bool, CrashGCForDumpingJavaThread, false, \
1199 "Manually make GC thread crash then dump java stack trace; " \
1200 "Test only") \
1201 \
1202 /* compilation */ \
1203 product(bool, UseCompiler, true, \
1204 "Use Just-In-Time compilation") \
1205 \
1206 product(bool, AlwaysCompileLoopMethods, false, \
1207 "When using recompilation, never interpret methods " \
1208 "containing loops") \
1209 \
1210 product(int, AllocatePrefetchStyle, 1, \
1211 "0 = no prefetch, " \
1712 product(bool, UsePerfData, true, \
1713 "Flag to disable jvmstat instrumentation for performance testing "\
1714 "and problem isolation purposes") \
1715 \
1716 product(bool, PerfDataSaveToFile, false, \
1717 "Save PerfData memory to hsperfdata_<pid> file on exit") \
1718 \
1719 product(ccstr, PerfDataSaveFile, nullptr, \
1720 "Save PerfData memory to the specified absolute pathname. " \
1721 "The string %p in the file name (if present) " \
1722 "will be replaced by pid") \
1723 \
1724 product(int, PerfDataSamplingInterval, 50, \
1725 "Data sampling interval (in milliseconds)") \
1726 range(PeriodicTask::min_interval, max_jint) \
1727 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \
1728 \
1729 product(bool, PerfDisableSharedMem, false, \
1730 "Store performance data in standard memory") \
1731 \
1732 product(int, PerfDataMemorySize, 32*K, \
1733 "Size of performance data memory region. Will be rounded " \
1734 "up to a multiple of the native os page size.") \
1735 range(128, 32*64*K) \
1736 \
1737 product(int, PerfMaxStringConstLength, 1024, \
1738 "Maximum PerfStringConstant string length before truncation") \
1739 range(32, 32*K) \
1740 \
1741 product(bool, PerfAllowAtExitRegistration, false, \
1742 "Allow registration of atexit() methods") \
1743 \
1744 product(bool, PerfBypassFileSystemCheck, false, \
1745 "Bypass Win32 file system criteria checks (Windows Only)") \
1746 \
1747 product(int, UnguardOnExecutionViolation, 0, \
1748 "Unguard page and retry on no-execute fault (Win32 only) " \
1749 "0=off, 1=conservative, 2=aggressive") \
1750 range(0, 2) \
1751 \
1752 /* Serviceability Support */ \
1959 range(0, 2) \
1960 \
1961 product(bool, UseObjectMonitorTable, false, DIAGNOSTIC, \
1962 "With Lightweight Locking mode, use a table to record inflated " \
1963 "monitors rather than the first word of the object.") \
1964 \
1965 product(int, LightweightFastLockingSpins, 13, DIAGNOSTIC, \
1966 "Specifies the number of times lightweight fast locking will " \
1967 "attempt to CAS the markWord before inflating. Between each " \
1968 "CAS it will spin for exponentially more time, resulting in " \
1969 "a total number of spins on the order of O(2^value)") \
1970 range(1, 30) \
1971 \
1972 product(uint, TrimNativeHeapInterval, 0, \
1973 "Interval, in ms, at which the JVM will trim the native heap if " \
1974 "the platform supports that. Lower values will reclaim memory " \
1975 "more eagerly at the cost of higher overhead. A value of 0 " \
1976 "(default) disables native heap trimming.") \
1977 range(0, UINT_MAX) \
1978 \
1979 develop(bool, SimulateFullAddressSpace, false, \
1980 "Simulates a very populated, fragmented address space; no " \
1981 "targeted reservations will succeed.") \
1982 \
1983 product(bool, ProfileExceptionHandlers, true, \
1984 "Profile exception handlers") \
1985 \
1986 product(bool, AlwaysRecordEvolDependencies, true, EXPERIMENTAL, \
1987 "Unconditionally record nmethod dependencies on class " \
1988 "rewriting/transformation independently of the JVMTI " \
1989 "can_{retransform/redefine}_classes capabilities.") \
1990 \
1991 product(bool, UseSecondarySupersCache, true, DIAGNOSTIC, \
1992 "Use secondary supers cache during subtype checks.") \
1993 \
1994 product(bool, UseSecondarySupersTable, false, DIAGNOSTIC, \
1995 "Use hash table to lookup secondary supers.") \
1996 \
1997 product(bool, VerifySecondarySupers, false, DIAGNOSTIC, \
1998 "Check that linear and hashed secondary lookups return the same result.") \
1999 \
2000 product(bool, StressSecondarySupers, false, DIAGNOSTIC, \
2001 "Use a terrible hash function in order to generate many collisions.") \
2002 \
2003 product(bool, UseThreadsLockThrottleLock, true, DIAGNOSTIC, \
2004 "Use an extra lock during Thread start and exit to alleviate" \
2005 "contention on Threads_lock.") \
2006
2007 // end of RUNTIME_FLAGS
2008
2009 DECLARE_FLAGS(LP64_RUNTIME_FLAGS)
2010 DECLARE_ARCH_FLAGS(ARCH_FLAGS)
2011 DECLARE_FLAGS(RUNTIME_FLAGS)
2012 DECLARE_FLAGS(RUNTIME_OS_FLAGS)
2013
2014 #endif // SHARE_RUNTIME_GLOBALS_HPP
|
111 const size_t minimumStringTableSize = 128;
112 const size_t defaultSymbolTableSize = 32768; // 2^15
113 const size_t minimumSymbolTableSize = 1024;
114
115 #ifdef _LP64
116 #define LP64_RUNTIME_FLAGS(develop, \
117 develop_pd, \
118 product, \
119 product_pd, \
120 range, \
121 constraint) \
122 \
123 product(bool, UseCompressedOops, false, \
124 "Use 32-bit object references in 64-bit VM. " \
125 "lp64_product means flag is always constant in 32 bit VM") \
126 \
127 product(bool, UseCompressedClassPointers, true, \
128 "Use 32-bit class pointers in 64-bit VM. " \
129 "lp64_product means flag is always constant in 32 bit VM") \
130 \
131 /* Leyden */ \
132 product(bool, UseCompatibleCompressedOops, false, \
133 "Always use HeapBasedNarrowOop mode, so that AOT code can be " \
134 "always work regardless of runtime heap range") \
135 \
136 product(bool, UseCompactObjectHeaders, false, EXPERIMENTAL, \
137 "Use compact 64-bit object headers in 64-bit VM") \
138 \
139 product(int, ObjectAlignmentInBytes, 8, \
140 "Default object alignment in bytes, 8 is minimum") \
141 range(8, 256) \
142 constraint(ObjectAlignmentInBytesConstraintFunc, AtParse)
143
144 #else
145 // !_LP64
146
147 #define LP64_RUNTIME_FLAGS(develop, \
148 develop_pd, \
149 product, \
150 product_pd, \
151 range, \
152 constraint)
153 const bool UseCompressedOops = false;
154 const bool UseCompressedClassPointers = false;
155 const bool UseCompactObjectHeaders = false;
368 "Enables intrinsification of ArraysSupport.vectorizedHashCode()") \
369 \
370 product(bool, UseCopySignIntrinsic, false, DIAGNOSTIC, \
371 "Enables intrinsification of Math.copySign") \
372 \
373 product(bool, UseSignumIntrinsic, false, DIAGNOSTIC, \
374 "Enables intrinsification of Math.signum") \
375 \
376 product_pd(bool, DelayCompilerStubsGeneration, DIAGNOSTIC, \
377 "Use Compiler thread for compiler's stubs generation") \
378 \
379 product(ccstrlist, DisableIntrinsic, "", DIAGNOSTIC, \
380 "do not expand intrinsics whose (internal) names appear here") \
381 constraint(DisableIntrinsicConstraintFunc,AfterErgo) \
382 \
383 product(ccstrlist, ControlIntrinsic, "", DIAGNOSTIC, \
384 "Control intrinsics using a list of +/- (internal) names, " \
385 "separated by commas") \
386 constraint(ControlIntrinsicConstraintFunc,AfterErgo) \
387 \
388 develop(ccstr, AddRuntimeUpcallsNOP, nullptr, \
389 "Register a runtime upcall for testing." \
390 "Format is '[upcallType]:[methodFilter]'" \
391 "where upcallType is one of 'onMethodEntry', 'onMethodExit'" \
392 "and methodFilter is one of 'none', 'all'") \
393 \
394 develop(bool, TraceCallFixup, false, \
395 "Trace all call fixups") \
396 \
397 develop(bool, DeoptimizeALot, false, \
398 "Deoptimize at every exit from the runtime system") \
399 \
400 develop(ccstrlist, DeoptimizeOnlyAt, "", \
401 "A comma separated list of bcis to deoptimize at") \
402 \
403 develop(bool, DeoptimizeRandom, false, \
404 "Deoptimize random frames on random exit from the runtime system")\
405 \
406 develop(bool, ZombieALot, false, \
407 "Create non-entrant nmethods at exit from the runtime system") \
408 \
409 develop(bool, WalkStackALot, false, \
410 "Trace stack (no print) at every exit from the runtime system") \
411 \
412 develop(bool, DeoptimizeObjectsALot, false, \
413 "For testing purposes concurrent threads revert optimizations " \
1014 "Print all VM flags after argument and ergonomic processing") \
1015 \
1016 develop(bool, PrintFlagsWithComments, false, \
1017 "Print all VM flags with default values and descriptions and " \
1018 "exit") \
1019 \
1020 product(bool, PrintFlagsRanges, false, \
1021 "Print VM flags and their ranges") \
1022 \
1023 product(bool, SerializeVMOutput, true, DIAGNOSTIC, \
1024 "Use a mutex to serialize output to tty and LogFile") \
1025 \
1026 product(bool, DisplayVMOutput, true, DIAGNOSTIC, \
1027 "Display all VM output on the tty, independently of LogVMOutput") \
1028 \
1029 product(bool, LogVMOutput, false, DIAGNOSTIC, \
1030 "Save VM output to LogFile") \
1031 \
1032 product(ccstr, LogFile, nullptr, DIAGNOSTIC, \
1033 "If LogVMOutput or LogCompilation is on, save VM output to " \
1034 "this file [default: ./hotspot_%p.log] (%p replaced with pidNNN)")\
1035 \
1036 product(ccstr, ErrorFile, nullptr, \
1037 "If an error occurs, save the error data to this file " \
1038 "[default: ./hs_err_%p.log] (%p replaced with pidNNN)") \
1039 \
1040 product(bool, ExtensiveErrorReports, \
1041 PRODUCT_ONLY(false) NOT_PRODUCT(true), \
1042 "Error reports are more extensive.") \
1043 \
1044 product(bool, DisplayVMOutputToStderr, false, \
1045 "If DisplayVMOutput is true, display all VM output to stderr") \
1046 \
1047 product(bool, DisplayVMOutputToStdout, false, \
1048 "If DisplayVMOutput is true, display all VM output to stdout") \
1049 \
1050 product(bool, ErrorFileToStderr, false, \
1051 "If true, error data is printed to stderr instead of a file") \
1052 \
1053 product(bool, ErrorFileToStdout, false, \
1054 "If true, error data is printed to stdout instead of a file") \
1055 \
1056 develop(bool, VerifyHeavyMonitors, false, \
1057 "Checks that no stack locking happens when using " \
1058 "-XX:LockingMode=0 (LM_MONITOR)") \
1138 product(bool, UseInterpreter, true, \
1139 "Use interpreter for non-compiled methods") \
1140 \
1141 develop(bool, UseFastSignatureHandlers, true, \
1142 "Use fast signature handlers for native calls") \
1143 \
1144 product(bool, UseLoopCounter, true, \
1145 "Increment invocation counter on backward branch") \
1146 \
1147 product_pd(bool, UseOnStackReplacement, \
1148 "Use on stack replacement, calls runtime if invoc. counter " \
1149 "overflows in loop") \
1150 \
1151 develop(bool, TraceOnStackReplacement, false, \
1152 "Trace on stack replacement") \
1153 \
1154 product_pd(bool, PreferInterpreterNativeStubs, \
1155 "Use always interpreter stubs for native methods invoked via " \
1156 "interpreter") \
1157 \
1158 product(bool, CountBytecodes, false, DIAGNOSTIC, \
1159 "Count number of bytecodes executed") \
1160 \
1161 product(bool, CountBytecodesPerThread, false, DIAGNOSTIC, \
1162 "Count number of bytecodes executed per thread") \
1163 \
1164 product(bool, PrintBytecodeHistogram, false, DIAGNOSTIC, \
1165 "Print histogram of the executed bytecodes") \
1166 \
1167 product(double, PrintBytecodeHistogramCutoff, 0.01, \
1168 "Print cutoff for histogram of the executed bytecodes") \
1169 range(0.0, 100.0) \
1170 \
1171 develop(bool, PrintBytecodePairHistogram, false, \
1172 "Print histogram of the executed bytecode pairs") \
1173 \
1174 product(bool, PrintSignatureHandlers, false, DIAGNOSTIC, \
1175 "Print code generated for native method signature handlers") \
1176 \
1177 develop(bool, VerifyOops, false, \
1178 "Do plausibility checks for oops") \
1179 \
1180 develop(bool, CheckUnhandledOops, false, \
1181 "Check for unhandled oops in VM code") \
1182 \
1183 develop(bool, VerifyJNIFields, trueInDebug, \
1184 "Verify jfieldIDs for instance fields") \
1185 \
1186 develop(bool, VerifyFPU, false, \
1187 "Verify FPU state (check for NaN's, etc.)") \
1188 \
1189 develop(bool, VerifyActivationFrameSize, false, \
1190 "Verify that activation frame didn't become smaller than its " \
1191 "minimal size") \
1192 \
1193 develop(bool, TraceFrequencyInlining, false, \
1194 "Trace frequency based inlining") \
1195 \
1196 develop_pd(bool, InlineIntrinsics, \
1197 "Use intrinsics in Interpreter that can be statically resolved") \
1198 \
1199 product_pd(bool, ProfileInterpreter, \
1200 "Profile at the bytecode level during interpretation") \
1201 \
1202 develop_pd(bool, ProfileTraps, \
1203 "Profile deoptimization traps at the bytecode level") \
1204 \
1205 product(intx, ProfileMaturityPercentage, 20, \
1206 "number of method invocations/branches (expressed as % of " \
1207 "CompileThreshold) before using the method's profile") \
1208 range(0, 100) \
1209 \
1210 product(bool, ForceProfiling, false, DIAGNOSTIC, \
1211 "Eagerly allocate MDOs") \
1212 \
1213 product(bool, PrintMethodData, false, DIAGNOSTIC, \
1214 "Print the results of +ProfileInterpreter at end of run") \
1215 \
1216 develop(bool, VerifyDataPointer, trueInDebug, \
1217 "Verify the method data pointer during interpreter profiling") \
1218 \
1219 develop(bool, CrashGCForDumpingJavaThread, false, \
1220 "Manually make GC thread crash then dump java stack trace; " \
1221 "Test only") \
1222 \
1223 /* compilation */ \
1224 product(bool, UseCompiler, true, \
1225 "Use Just-In-Time compilation") \
1226 \
1227 product(bool, AlwaysCompileLoopMethods, false, \
1228 "When using recompilation, never interpret methods " \
1229 "containing loops") \
1230 \
1231 product(int, AllocatePrefetchStyle, 1, \
1232 "0 = no prefetch, " \
1733 product(bool, UsePerfData, true, \
1734 "Flag to disable jvmstat instrumentation for performance testing "\
1735 "and problem isolation purposes") \
1736 \
1737 product(bool, PerfDataSaveToFile, false, \
1738 "Save PerfData memory to hsperfdata_<pid> file on exit") \
1739 \
1740 product(ccstr, PerfDataSaveFile, nullptr, \
1741 "Save PerfData memory to the specified absolute pathname. " \
1742 "The string %p in the file name (if present) " \
1743 "will be replaced by pid") \
1744 \
1745 product(int, PerfDataSamplingInterval, 50, \
1746 "Data sampling interval (in milliseconds)") \
1747 range(PeriodicTask::min_interval, max_jint) \
1748 constraint(PerfDataSamplingIntervalFunc, AfterErgo) \
1749 \
1750 product(bool, PerfDisableSharedMem, false, \
1751 "Store performance data in standard memory") \
1752 \
1753 product(int, PerfDataMemorySize, 64*K, \
1754 "Size of performance data memory region. Will be rounded " \
1755 "up to a multiple of the native os page size.") \
1756 range(128, 32*64*K) \
1757 \
1758 product(int, PerfMaxStringConstLength, 1024, \
1759 "Maximum PerfStringConstant string length before truncation") \
1760 range(32, 32*K) \
1761 \
1762 product(bool, PerfAllowAtExitRegistration, false, \
1763 "Allow registration of atexit() methods") \
1764 \
1765 product(bool, PerfBypassFileSystemCheck, false, \
1766 "Bypass Win32 file system criteria checks (Windows Only)") \
1767 \
1768 product(int, UnguardOnExecutionViolation, 0, \
1769 "Unguard page and retry on no-execute fault (Win32 only) " \
1770 "0=off, 1=conservative, 2=aggressive") \
1771 range(0, 2) \
1772 \
1773 /* Serviceability Support */ \
1980 range(0, 2) \
1981 \
1982 product(bool, UseObjectMonitorTable, false, DIAGNOSTIC, \
1983 "With Lightweight Locking mode, use a table to record inflated " \
1984 "monitors rather than the first word of the object.") \
1985 \
1986 product(int, LightweightFastLockingSpins, 13, DIAGNOSTIC, \
1987 "Specifies the number of times lightweight fast locking will " \
1988 "attempt to CAS the markWord before inflating. Between each " \
1989 "CAS it will spin for exponentially more time, resulting in " \
1990 "a total number of spins on the order of O(2^value)") \
1991 range(1, 30) \
1992 \
1993 product(uint, TrimNativeHeapInterval, 0, \
1994 "Interval, in ms, at which the JVM will trim the native heap if " \
1995 "the platform supports that. Lower values will reclaim memory " \
1996 "more eagerly at the cost of higher overhead. A value of 0 " \
1997 "(default) disables native heap trimming.") \
1998 range(0, UINT_MAX) \
1999 \
2000 product(bool, ProfileVMLocks, false, DIAGNOSTIC, \
2001 "Profile VM locks usage on main thread") \
2002 \
2003 product(bool, ProfileVMCalls, false, DIAGNOSTIC, \
2004 "Profile VM calls on main thread") \
2005 \
2006 product(bool, ProfileVMOps, true, DIAGNOSTIC, \
2007 "Profile VM operations on main thread") \
2008 \
2009 product(bool, ProfileRuntimeCalls, false, DIAGNOSTIC, \
2010 "Profile calls into VM runtime on main thread") \
2011 \
2012 develop(bool, SimulateFullAddressSpace, false, \
2013 "Simulates a very populated, fragmented address space; no " \
2014 "targeted reservations will succeed.") \
2015 \
2016 product(bool, ProfileExceptionHandlers, true, \
2017 "Profile exception handlers") \
2018 \
2019 product(bool, AlwaysRecordEvolDependencies, true, EXPERIMENTAL, \
2020 "Unconditionally record nmethod dependencies on class " \
2021 "rewriting/transformation independently of the JVMTI " \
2022 "can_{retransform/redefine}_classes capabilities.") \
2023 \
2024 product(bool, TraceThreadTime, false, \
2025 "Enable tracing of thread time in Perf counters") \
2026 \
2027 product(bool, UseSecondarySupersCache, true, DIAGNOSTIC, \
2028 "Use secondary supers cache during subtype checks.") \
2029 \
2030 product(bool, UseSecondarySupersTable, false, DIAGNOSTIC, \
2031 "Use hash table to lookup secondary supers.") \
2032 \
2033 product(bool, VerifySecondarySupers, false, DIAGNOSTIC, \
2034 "Check that linear and hashed secondary lookups return the same result.") \
2035 \
2036 product(bool, StressSecondarySupers, false, DIAGNOSTIC, \
2037 "Use a terrible hash function in order to generate many collisions.") \
2038 \
2039 develop(bool, TestAdapterLinkFailure, false, \
2040 "Test failure of adapter linking when loading from AOT cache.") \
2041 \
2042 product(bool, UseThreadsLockThrottleLock, true, DIAGNOSTIC, \
2043 "Use an extra lock during Thread start and exit to alleviate" \
2044 "contention on Threads_lock.") \
2045
2046
2047 // end of RUNTIME_FLAGS
2048
2049 DECLARE_FLAGS(LP64_RUNTIME_FLAGS)
2050 DECLARE_ARCH_FLAGS(ARCH_FLAGS)
2051 DECLARE_FLAGS(RUNTIME_FLAGS)
2052 DECLARE_FLAGS(RUNTIME_OS_FLAGS)
2053
2054 #endif // SHARE_RUNTIME_GLOBALS_HPP
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