796 "Restrict @Contended to trusted classes") \
797 \
798 product(intx, DiagnoseSyncOnValueBasedClasses, 0, DIAGNOSTIC, \
799 "Detect and take action upon identifying synchronization on " \
800 "value based classes. Modes: " \
801 "0: off; " \
802 "1: exit with fatal error; " \
803 "2: log message to stdout. Output file can be specified with " \
804 " -Xlog:valuebasedclasses. If JFR is running it will " \
805 " also generate JFR events.") \
806 range(0, 2) \
807 \
808 product(bool, ExitOnOutOfMemoryError, false, \
809 "JVM exits on the first occurrence of an out-of-memory error " \
810 "thrown from JVM") \
811 \
812 product(bool, CrashOnOutOfMemoryError, false, \
813 "JVM aborts, producing an error log and core/mini dump, on the " \
814 "first occurrence of an out-of-memory error thrown from JVM") \
815 \
816 /* tracing */ \
817 \
818 develop(bool, StressRewriter, false, \
819 "Stress linktime bytecode rewriting") \
820 \
821 product(ccstr, TraceJVMTI, NULL, \
822 "Trace flags for JVMTI functions and events") \
823 \
824 product(bool, StressLdcRewrite, false, DIAGNOSTIC, \
825 "Force ldc -> ldc_w rewrite during RedefineClasses. " \
826 "This option can change an EMCP method into an obsolete method " \
827 "and can affect tests that expect specific methods to be EMCP. " \
828 "This option should be used with caution.") \
829 \
830 product(bool, AllowRedefinitionToAddDeleteMethods, false, \
831 "(Deprecated) Allow redefinition to add and delete private " \
832 "static or final methods for compatibility with old releases") \
833 \
834 develop(bool, TraceBytecodes, false, \
835 "Trace bytecode execution") \
1713 product_pd(bool, TieredCompilation, \
1714 "Enable tiered compilation") \
1715 \
1716 /* Properties for Java libraries */ \
1717 \
1718 product(uint64_t, MaxDirectMemorySize, 0, \
1719 "Maximum total size of NIO direct-buffer allocations") \
1720 range(0, max_jlong) \
1721 \
1722 /* Flags used for temporary code during development */ \
1723 \
1724 product(bool, UseNewCode, false, DIAGNOSTIC, \
1725 "Testing Only: Use the new version while testing") \
1726 \
1727 product(bool, UseNewCode2, false, DIAGNOSTIC, \
1728 "Testing Only: Use the new version while testing") \
1729 \
1730 product(bool, UseNewCode3, false, DIAGNOSTIC, \
1731 "Testing Only: Use the new version while testing") \
1732 \
1733 notproduct(bool, UseDebuggerErgo, false, \
1734 "Debugging Only: Adjust the VM to be more debugger-friendly. " \
1735 "Turns on the other UseDebuggerErgo* flags") \
1736 \
1737 notproduct(bool, UseDebuggerErgo1, false, \
1738 "Debugging Only: Enable workarounds for debugger induced " \
1739 "os::processor_id() >= os::processor_count() problems") \
1740 \
1741 notproduct(bool, UseDebuggerErgo2, false, \
1742 "Debugging Only: Limit the number of spawned JVM threads") \
1743 \
1744 notproduct(bool, EnableJVMTIStackDepthAsserts, true, \
1745 "Enable JVMTI asserts related to stack depth checks") \
1746 \
1747 /* flags for performance data collection */ \
1748 \
1749 product(bool, UsePerfData, true, \
1750 "Flag to disable jvmstat instrumentation for performance testing "\
1751 "and problem isolation purposes") \
1752 \
1839 \
1840 product(ccstr, SharedArchiveConfigFile, NULL, \
1841 "Data to add to the CDS archive file") \
1842 \
1843 product(uintx, SharedSymbolTableBucketSize, 4, \
1844 "Average number of symbols per bucket in shared table") \
1845 range(2, 246) \
1846 \
1847 product(bool, AllowArchivingWithJavaAgent, false, DIAGNOSTIC, \
1848 "Allow Java agent to be run with CDS dumping") \
1849 \
1850 product(bool, PrintMethodHandleStubs, false, DIAGNOSTIC, \
1851 "Print generated stub code for method handles") \
1852 \
1853 product(bool, VerifyMethodHandles, trueInDebug, DIAGNOSTIC, \
1854 "perform extra checks when constructing method handles") \
1855 \
1856 product(bool, ShowHiddenFrames, false, DIAGNOSTIC, \
1857 "show method handle implementation frames (usually hidden)") \
1858 \
1859 product(bool, TrustFinalNonStaticFields, false, EXPERIMENTAL, \
1860 "trust final non-static declarations for constant folding") \
1861 \
1862 product(bool, FoldStableValues, true, DIAGNOSTIC, \
1863 "Optimize loads from stable fields (marked w/ @Stable)") \
1864 \
1865 product(int, UseBootstrapCallInfo, 1, DIAGNOSTIC, \
1866 "0: when resolving InDy or ConDy, force all BSM arguments to be " \
1867 "resolved before the bootstrap method is called; 1: when a BSM " \
1868 "that may accept a BootstrapCallInfo is detected, use that API " \
1869 "to pass BSM arguments, which allows the BSM to delay their " \
1870 "resolution; 2+: stress test the BCI API by calling more BSMs " \
1871 "via that API, instead of with the eagerly-resolved array.") \
1872 \
1873 product(bool, PauseAtStartup, false, DIAGNOSTIC, \
1874 "Causes the VM to pause at startup time and wait for the pause " \
1875 "file to be removed (default: ./vm.paused.<pid>)") \
1876 \
1877 product(ccstr, PauseAtStartupFile, NULL, DIAGNOSTIC, \
1878 "The file to create and for whose removal to await when pausing " \
1995 "@IntrinsicCandidate annotation, that " \
1996 "(2) there is an intrinsic registered for all loaded methods " \
1997 "that are annotated with the @IntrinsicCandidate annotation, " \
1998 "and that " \
1999 "(3) no orphan methods exist for class C (i.e., methods for " \
2000 "which the VM declares an intrinsic but that are not declared "\
2001 "in the loaded class C. " \
2002 "Check (3) is available only in debug builds.") \
2003 \
2004 product_pd(intx, InitArrayShortSize, DIAGNOSTIC, \
2005 "Threshold small size (in bytes) for clearing arrays. " \
2006 "Anything this size or smaller may get converted to discrete " \
2007 "scalar stores.") \
2008 range(0, max_intx) \
2009 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \
2010 \
2011 product(ccstr, AllocateHeapAt, NULL, \
2012 "Path to the directory where a temporary file will be created " \
2013 "to use as the backing store for Java Heap.") \
2014 \
2015 develop(int, VerifyMetaspaceInterval, DEBUG_ONLY(500) NOT_DEBUG(0), \
2016 "Run periodic metaspace verifications (0 - none, " \
2017 "1 - always, >1 every nth interval)") \
2018 \
2019 product(bool, ShowRegistersOnAssert, true, DIAGNOSTIC, \
2020 "On internal errors, include registers in error report.") \
2021 \
2022 product(bool, UseSwitchProfiling, true, DIAGNOSTIC, \
2023 "leverage profiling for table/lookup switch") \
2024 \
2025 develop(bool, TraceMemoryWriteback, false, \
2026 "Trace memory writeback operations") \
2027 \
2028 JFR_ONLY(product(bool, FlightRecorder, false, \
2029 "(Deprecated) Enable Flight Recorder")) \
2030 \
2031 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \
2032 "Flight Recorder options")) \
2033 \
2034 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \
|
796 "Restrict @Contended to trusted classes") \
797 \
798 product(intx, DiagnoseSyncOnValueBasedClasses, 0, DIAGNOSTIC, \
799 "Detect and take action upon identifying synchronization on " \
800 "value based classes. Modes: " \
801 "0: off; " \
802 "1: exit with fatal error; " \
803 "2: log message to stdout. Output file can be specified with " \
804 " -Xlog:valuebasedclasses. If JFR is running it will " \
805 " also generate JFR events.") \
806 range(0, 2) \
807 \
808 product(bool, ExitOnOutOfMemoryError, false, \
809 "JVM exits on the first occurrence of an out-of-memory error " \
810 "thrown from JVM") \
811 \
812 product(bool, CrashOnOutOfMemoryError, false, \
813 "JVM aborts, producing an error log and core/mini dump, on the " \
814 "first occurrence of an out-of-memory error thrown from JVM") \
815 \
816 product(bool, DetectLocksInCompiledFrames, true, \
817 "Detect monitors in continuation compiled frames") \
818 \
819 /* tracing */ \
820 \
821 develop(bool, StressRewriter, false, \
822 "Stress linktime bytecode rewriting") \
823 \
824 product(ccstr, TraceJVMTI, NULL, \
825 "Trace flags for JVMTI functions and events") \
826 \
827 product(bool, StressLdcRewrite, false, DIAGNOSTIC, \
828 "Force ldc -> ldc_w rewrite during RedefineClasses. " \
829 "This option can change an EMCP method into an obsolete method " \
830 "and can affect tests that expect specific methods to be EMCP. " \
831 "This option should be used with caution.") \
832 \
833 product(bool, AllowRedefinitionToAddDeleteMethods, false, \
834 "(Deprecated) Allow redefinition to add and delete private " \
835 "static or final methods for compatibility with old releases") \
836 \
837 develop(bool, TraceBytecodes, false, \
838 "Trace bytecode execution") \
1716 product_pd(bool, TieredCompilation, \
1717 "Enable tiered compilation") \
1718 \
1719 /* Properties for Java libraries */ \
1720 \
1721 product(uint64_t, MaxDirectMemorySize, 0, \
1722 "Maximum total size of NIO direct-buffer allocations") \
1723 range(0, max_jlong) \
1724 \
1725 /* Flags used for temporary code during development */ \
1726 \
1727 product(bool, UseNewCode, false, DIAGNOSTIC, \
1728 "Testing Only: Use the new version while testing") \
1729 \
1730 product(bool, UseNewCode2, false, DIAGNOSTIC, \
1731 "Testing Only: Use the new version while testing") \
1732 \
1733 product(bool, UseNewCode3, false, DIAGNOSTIC, \
1734 "Testing Only: Use the new version while testing") \
1735 \
1736 product(intx, ContPerfTest, 1000, DIAGNOSTIC, \
1737 "Testing Only: Use the new version while testing") \
1738 \
1739 notproduct(bool, UseDebuggerErgo, false, \
1740 "Debugging Only: Adjust the VM to be more debugger-friendly. " \
1741 "Turns on the other UseDebuggerErgo* flags") \
1742 \
1743 notproduct(bool, UseDebuggerErgo1, false, \
1744 "Debugging Only: Enable workarounds for debugger induced " \
1745 "os::processor_id() >= os::processor_count() problems") \
1746 \
1747 notproduct(bool, UseDebuggerErgo2, false, \
1748 "Debugging Only: Limit the number of spawned JVM threads") \
1749 \
1750 notproduct(bool, EnableJVMTIStackDepthAsserts, true, \
1751 "Enable JVMTI asserts related to stack depth checks") \
1752 \
1753 /* flags for performance data collection */ \
1754 \
1755 product(bool, UsePerfData, true, \
1756 "Flag to disable jvmstat instrumentation for performance testing "\
1757 "and problem isolation purposes") \
1758 \
1845 \
1846 product(ccstr, SharedArchiveConfigFile, NULL, \
1847 "Data to add to the CDS archive file") \
1848 \
1849 product(uintx, SharedSymbolTableBucketSize, 4, \
1850 "Average number of symbols per bucket in shared table") \
1851 range(2, 246) \
1852 \
1853 product(bool, AllowArchivingWithJavaAgent, false, DIAGNOSTIC, \
1854 "Allow Java agent to be run with CDS dumping") \
1855 \
1856 product(bool, PrintMethodHandleStubs, false, DIAGNOSTIC, \
1857 "Print generated stub code for method handles") \
1858 \
1859 product(bool, VerifyMethodHandles, trueInDebug, DIAGNOSTIC, \
1860 "perform extra checks when constructing method handles") \
1861 \
1862 product(bool, ShowHiddenFrames, false, DIAGNOSTIC, \
1863 "show method handle implementation frames (usually hidden)") \
1864 \
1865 product(bool, ShowCarrierFrames, false, DIAGNOSTIC, \
1866 "show virtual threads' carrier frames in exceptions") \
1867 \
1868 product(bool, TrustFinalNonStaticFields, false, EXPERIMENTAL, \
1869 "trust final non-static declarations for constant folding") \
1870 \
1871 product(bool, FoldStableValues, true, DIAGNOSTIC, \
1872 "Optimize loads from stable fields (marked w/ @Stable)") \
1873 \
1874 product(int, UseBootstrapCallInfo, 1, DIAGNOSTIC, \
1875 "0: when resolving InDy or ConDy, force all BSM arguments to be " \
1876 "resolved before the bootstrap method is called; 1: when a BSM " \
1877 "that may accept a BootstrapCallInfo is detected, use that API " \
1878 "to pass BSM arguments, which allows the BSM to delay their " \
1879 "resolution; 2+: stress test the BCI API by calling more BSMs " \
1880 "via that API, instead of with the eagerly-resolved array.") \
1881 \
1882 product(bool, PauseAtStartup, false, DIAGNOSTIC, \
1883 "Causes the VM to pause at startup time and wait for the pause " \
1884 "file to be removed (default: ./vm.paused.<pid>)") \
1885 \
1886 product(ccstr, PauseAtStartupFile, NULL, DIAGNOSTIC, \
1887 "The file to create and for whose removal to await when pausing " \
2004 "@IntrinsicCandidate annotation, that " \
2005 "(2) there is an intrinsic registered for all loaded methods " \
2006 "that are annotated with the @IntrinsicCandidate annotation, " \
2007 "and that " \
2008 "(3) no orphan methods exist for class C (i.e., methods for " \
2009 "which the VM declares an intrinsic but that are not declared "\
2010 "in the loaded class C. " \
2011 "Check (3) is available only in debug builds.") \
2012 \
2013 product_pd(intx, InitArrayShortSize, DIAGNOSTIC, \
2014 "Threshold small size (in bytes) for clearing arrays. " \
2015 "Anything this size or smaller may get converted to discrete " \
2016 "scalar stores.") \
2017 range(0, max_intx) \
2018 constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \
2019 \
2020 product(ccstr, AllocateHeapAt, NULL, \
2021 "Path to the directory where a temporary file will be created " \
2022 "to use as the backing store for Java Heap.") \
2023 \
2024 product(bool, LoomGenCode, true, \
2025 "Generate oopmap code") \
2026 \
2027 develop(bool, LoomDeoptAfterThaw, false, \
2028 "Deopt stack after thaw") \
2029 \
2030 develop(bool, LoomVerifyAfterThaw, false, \
2031 "Verify stack after thaw") \
2032 \
2033 product(bool, UseContinuationStrong, true, \
2034 "The weak keepalive is considered strong on stack") \
2035 \
2036 product(bool, TrimContinuationChunksInGC, false, \
2037 "Trim stack chunks when copying objects in GC") \
2038 \
2039 product(bool, UseChunkBitmaps, false, \
2040 "Generate oop bitmaps for continuation chunks") \
2041 \
2042 product(bool, UseContinuationFastPath, true, \
2043 "Use fast-path frame walking in continuations") \
2044 \
2045 product(bool, UseContinuationStreamingCopy, false, \
2046 "Use streaming memory when copying continuation stack chunks") \
2047 \
2048 develop(bool, VerifyContinuations, true, \
2049 "Verify continuation consistency") \
2050 \
2051 product(intx, ScopeLocalCacheSize, 16, \
2052 "Size of the cache for scoped values") \
2053 range(0, max_intx) \
2054 constraint(ScopeLocalCacheSizeConstraintFunc, AtParse) \
2055 \
2056 develop(int, VerifyMetaspaceInterval, DEBUG_ONLY(500) NOT_DEBUG(0), \
2057 "Run periodic metaspace verifications (0 - none, " \
2058 "1 - always, >1 every nth interval)") \
2059 \
2060 product(bool, ShowRegistersOnAssert, true, DIAGNOSTIC, \
2061 "On internal errors, include registers in error report.") \
2062 \
2063 product(bool, UseSwitchProfiling, true, DIAGNOSTIC, \
2064 "leverage profiling for table/lookup switch") \
2065 \
2066 develop(bool, TraceMemoryWriteback, false, \
2067 "Trace memory writeback operations") \
2068 \
2069 JFR_ONLY(product(bool, FlightRecorder, false, \
2070 "(Deprecated) Enable Flight Recorder")) \
2071 \
2072 JFR_ONLY(product(ccstr, FlightRecorderOptions, NULL, \
2073 "Flight Recorder options")) \
2074 \
2075 JFR_ONLY(product(ccstr, StartFlightRecording, NULL, \
|