Passing native build flags to GraalVM

[dcelasun]

Is there a way to do this? For example, to reduce parallelism, I tried:

$ ./mvnw clean package -Pmariadb -Pnative -DskipTests -H:parallelism=1

Unable to parse command line options: Unrecognized option: -H:parallelism=1

But that fails. MAVEN_OPTS="-H:parallelism=1" fails as well.

[Athou]

Haven't tried it but according to the Quarkus documentation you should be able to pass something like : -Dquarkus.native.additional-build-args=...

[dcelasun]

Hmm, that doesn't seem to be it. If I specify -Dquarkus.native.additional-build-args="-H:parallelism=1" it fails with:

Error: Could not find option 'parallelism' from 'user'. Use -H:PrintFlags= to list all available options.

So I tried H:PrintFlags= as the error message suggests, which gave me the output below, but that list doesn't match the flags documented here.

Output of H:PrintFlags=

``` -H:±AOTInline Deprecated. Default: + (enabled). -H:±AOTTrivialInline Perform trivial method inlining in the AOT compiled native image. Default: + (enabled). -H:APIFunctionPrefix="graal_" Prefix that is added to the names of API functions. -H:±AbortOnBenchmarkCounterOverflow Abort VM with SIGILL if benchmark counters controlled by the (Generic|Timed|Benchmark)DynamicCounters. Default: - (disabled). [Extra help available] -H:AbortOnFieldReachable=* Print a trace and abort the build process if any field matching the specified pattern becomes reachable. -H:AbortOnMethodReachable=* Print a trace and abort the build process if any method matching the specified pattern becomes reachable. -H:AbortOnTypeReachable=* Print a trace and abort the build process if any type matching the specified pattern becomes reachable. -H:±AddAllCharsets Make all hosted charsets available at run time. Default: - (disabled). -H:±AddAllFileSystemProviders Make all supported providers returned by FileSystemProvider.installedProviders() available at run time. Default: + (enabled). -H:AddExports=* Value /=(,)* updates to export to , regardless of module declaration. can be ALL-UNNAMED to export to all unnamed modules. -H:AddOpens=* Value /=(,)* updates to open to , regardless of module declaration. -H:AddReads=* Value =(,)* updates to read , regardless of module declaration. can be ALL-UNNAMED to read all unnamed modules. -H:AdditionalHeaderBytes=0 Add additional header bytes to each object, for diagnostic purposes. -H:AdditionalSecurityProviders=* Comma-separated list of additional security provider fully qualified class names to mark as used.Note that this option is only necessary if you use custom engine classes not available in JCA that are not JCA compliant. -H:AdditionalSecurityServiceTypes=* Comma-separated list of additional security service types (fully qualified class names) for automatic registration. Note that these must be JCA compliant. -H:AggregatedMetricsFile=... File to which aggregated metrics are dumped at shutdown. A CSV format is used if the file ends with .csv otherwise a more human readable format is used. If not specified, metrics are dumped to the console. Default: None -H:±AliasArrayTypeFlows Model all array type flows using a unique elements type flow abstraction. Default: + (enabled). -H:AlignedHeapChunkSize=524288 The size of an aligned chunk. Serial and epsilon GC only. -H:AllocateInstancePrefetchLines=1 Number of cache lines to load after the object address using prefetch instructions. -H:AllocatePrefetchDistance=192 Sets the size (in bytes) of the prefetch distance for object allocation. Memory about to be written with the value of new objects is prefetched up to this distance starting from the address of the last allocated object. Each Java thread has its own allocation point. -H:AllocatePrefetchInstr=0 Sets the prefetch instruction to prefetch ahead of the allocation pointer. Possible values are from 0 to 3. The actual instructions behind the values depend on the platform. -H:AllocatePrefetchLines=4 Number of cache lines to load after the array allocation using prefetch instructions. -H:AllocatePrefetchStepSize=64 Sets the step size (in bytes) for sequential prefetch instructions. -H:AllocatePrefetchStyle=1 Generated code style for prefetch instructions: for 0 or less no prefetch instructions are generated and for 1 or more prefetch instructions are introduced after each allocation. -H:±AllocationProfiling Enable runtime profiling of allocation. Default: - (disabled). -H:±AllocationSiteSensitiveHeap A context sensitive heap means that each heap allocated object is modeled by using at least the allocation site. Default: - (disabled). -H:±AllowDeprecatedAutomaticFeature Allow using deprecated @AutomaticFeature annotation. If set to false, an error is shown instead of a warning. Default: + (enabled). -H:±AllowDeprecatedBuilderClassesOnImageClasspath Instead of abort, only warn if image builder classes are found on the image class-path. Default: - (disabled). -H:±AllowDeprecatedInitializeAllClassesAtBuildTime Instead of abort, only warn if --initialize-at-build-time= is used. Default: - (disabled). -H:±AllowFoldMethods Allow MethodTypeFlow to see @Fold methods. Default: - (disabled). -H:±AllowIncompleteClasspath Deprecated. Default: - (disabled). -H:±AllowJRTFileSystem Enable support for reading Java modules (jimage format) and the jrt:// file system. Requires java.home to be set at runtime. Default: - (disabled). -H:±AllowVMInspection Enables features that allow the VM to be inspected during run time. Default: - (disabled). -H:±AllowVMInternalThreads Determines if VM internal threads (e.g., a dedicated VM operation or reference handling thread) are allowed in this image. Default: + (enabled). -H:±AlwaysInlineIntrinsics Unconditionally inline intrinsics. Default: - (disabled). -H:±AlwaysInlineVTableStubs Default: - (disabled). -H:AnalysisContextSensitivity="insens" Controls the static analysis context sensitivity. Available values: insens (context insensitive analysis), allocsens (context insensitive analysis, context insensitive heap, allocation site sensitive heap), _1obj (1 object sensitive analysis with a context insensitive heap), _2obj1h (2 object sensitive with a 1 context sensitive heap). -H:AnalysisSizeCutoff=8 The maximum size of type and method profiles returned by the static analysis. -1 indicates no limitation. -H:ArrayRegionEqualsConstantLimit=4096 Array region equality checks will be evaluated at compile time if the receiver is a constant and its length is smaller than this value. -H:±AssertInitializationSpecifiedForAllClasses Assert class initialization is specified for all classes. Default: - (disabled). -H:±AsyncSignalSafeDiagnostics Only print diagnostic output that is async signal safe. Default: - (disabled). -H:±BenchmarkCounterPrintingCutoff Use a cutoff to print only most significant counters. Default: + (enabled). -H:±BenchmarkCountersDumpDynamic Dump dynamic counters. Default: + (enabled). -H:±BenchmarkCountersDumpStatic Dump static counters. Default: - (disabled). -H:BenchmarkCountersFile=... File to which benchmark counters are dumped. A CSV format is used if the file ends with .csv otherwise a more human readable format is used. The fields in the CSV format are: category, group, name, value. Default: None -H:BenchmarkDynamicCounters=... Turn on the benchmark counters. The format of this option is:. Default: None [Extra help available] -H:±BootstrapInitializeOnly Do not compile anything on bootstrap but just initialize the compiler. Default: - (disabled). -H:BootstrapTimeout=15.0 Maximum time in minutes to spend bootstrapping (0 to disable this limit). -H:BootstrapWatchDogCriticalRateRatio=0.25 Ratio of the maximum compilation rate below which the bootstrap compilation rate must not fall (0 or less disables monitoring). -H:±BuildOutputBreakdowns Show code and heap breakdowns as part of the build output. Default: + (enabled). -H:±BuildOutputColorful Color build output (enabled by default if colors are supported by terminal). Default: - (disabled). -H:±BuildOutputGCWarnings Print GC warnings as part of build output. Default: + (enabled). -H:BuildOutputJSONFile=* Print build output statistics as JSON to the specified file. The output conforms to the JSON schema located at: docs/reference-manual/native-image/assets/build-output-schema-v0.9.2.json. -H:±BuildOutputLinks Show links in build output (defaults to the value of BuildOutputColorful). Default: - (disabled). -H:±BuildOutputPrefix Prefix build output with ':'. Default: - (disabled). -H:±BuildOutputProgress Report progress in build output (default is adaptive). Default: - (disabled). -H:±BuildOutputRecommendations Show recommendations as part of the build output. Default: + (enabled). -H:±BuildOutputSilent Silence build output. Default: - (disabled). -H:CAPCacheDir="" Directory where information generated by the CAnnotation Processor are cached. -H:CCompilerOption=* Provide custom C compiler option used for query code compilation. -H:CCompilerPath=... Provide custom path to C compiler used for query code compilation and linking. Default: None -H:CLibraryPath=* Search path for C libraries passed to the linker (list of comma-separated directories). -H:CPUFeatures=* Comma separated list of CPU features that will be enabled while building the target executable, irrespective of whether they are supported by the hosted environment. Note that enabling features not present within the target environment may result in application crashes. The specific options available are target platform dependent. See --list-cpu-features for feature list. These features are in addition to -march. -H:CStandard="C89" C standard to use in header files. Possible values are 'C89', 'C99', and 'C11'. -H:±CanonicalGraphStringsCheckConstants Exclude virtual nodes when dumping canonical text for graphs. Default: - (disabled). -H:±CanonicalGraphStringsExcludeVirtuals Exclude virtual nodes when dumping canonical text for graphs. Default: + (enabled). -H:±CanonicalGraphStringsRemoveIdentities Attempts to remove object identity hashes when dumping canonical text for graphs. Default: + (enabled). -H:CheckBootModuleDependencies=1 Temporary option to disable checking of image builder module dependencies or increasing its verbosity. -H:±CheckIsolateThreadAtEntry At CEntryPoints check that the passed IsolateThread is valid. Default: - (disabled). -H:±CheckRecurringCallbackOnNativeToJavaTransition Test whether a thread's recurring callback is pending on each transition from native code to Java. Default: - (disabled). -H:±CheckToolchain Check if native-toolchain is known to work with native-image. Default: + (enabled). -H:Class="" Class containing the default entry point method. Optional if --shared is used. -H:ClassInitialization=* A comma-separated list of classes appended with their initialization strategy (':build_time', ':rerun', or ':run_time'). -H:±ClearMetricsAfterBootstrap Clear the debug metrics after bootstrap. Default: - (disabled). -H:CodeAlignment=16 Alignment of AOT and JIT compiled code in bytes. -H:±CodeCacheCounters Count accesses to the image and runtime code info table. Default: - (disabled). -H:±CodeInfoEncoderCounters Statistics about code and deoptimization information. Default: - (disabled). -H:CodeInfoIndexGranularity=256 The granularity of the index for looking up code metadata. Should be a power of 2. Larger values make the index smaller, but access slower. -H:±CollectImageBuildStatistics Collect information during image build about devirtualized invokes and bytecode exceptions. Default: - (disabled). -H:Color="auto" Color build output ('always', 'never', or 'auto'). -H:±CompilationBailoutAsFailure Treat compilation bailouts like compilation failures. Default: - (disabled). -H:CompilationCountLimit=0 The number of compilations allowed for any method before the VM exits (a value of 0 means there is no limit). -H:CompilationExcludePhases=... Exclude certain phases from compilation, either unconditionally or with a method filter. Multiple exclusions can be specified separated by ':'. Phase names are matched as substrings, e.g.: CompilationExcludePhases=PartialEscape:Loop=A.*,B.foo excludes PartialEscapePhase from all compilations and any phase containing 'Loop' in its name from compilations of all methods in class A and of method B.foo. Default: None -H:CompilationExpirationPeriod=300.0 Time limit in seconds before a compilation expires (0 to disable the limit). A non-zero value for this option is doubled if assertions are enabled and quadrupled if DetailedAsserts is true. -H:CompilationFailureAction=Silent Specifies the action to take when compilation fails. [Extra help available] -H:CompilationWatchDogStartDelay=0 Delay in seconds before watch dog monitors a compilation (0 disables monitoring). -H:CompilationWatchDogVMExitDelay=0 Number of seconds after which a compilation appearing to make no progress causes the VM to exit (0 disables VM exiting). -H:±CompileGraalWithC1Only In tiered mode compile Graal and JVMCI using optimized first tier code. Default: + (enabled). -H:CompilerBackend="lir" Backend used by the compiler. -H:CompilerConfiguration=... Names the compiler configuration to use. If omitted, the compiler configuration with the highest auto-selection priority is used. To see the set of available configurations, supply the value 'help' to this option. Default: None -H:±ConditionalElimination Default: + (enabled). -H:±ConditionalEliminationBeforeAnalysis Run conditional elimination before static analysis. Default: + (enabled). -H:ConditionalEliminationMaxIterations=4 -H:ConfigurationFileDirectories=* Directories directly containing configuration files for dynamic features at runtime. -H:ConfigurationResourceRoots=* Resource path above configuration resources for dynamic features at runtime. -H:±ConfigureReflectionMetadata Enable runtime instantiation of reflection objects for non-invoked methods. Default: + (enabled). -H:ContendedPaddingWidth=128 How many bytes to pad fields and classes marked @Contended with. -H:Count=... Pattern for specifying scopes in which counters are enabled. See the Dump option for the pattern syntax. An empty value enables all counters unconditionally. Default: None -H:±CountWriteBarriers Instrument write barriers with counters. Serial GC only. Default: - (disabled). -H:Counters=... Comma separated names of counters that are enabled irrespective of the value for Count option. An empty value enables all counters unconditionally. Default: None -H:CrashAt=... Pattern for method(s) that will trigger an exception when compiled. This option exists to test handling compilation crashes gracefully. See the MethodFilter option for the pattern syntax. A ':Bailout' suffix will raise a bailout exception and a ':PermanentBailout' suffix will raise a permanent bailout exception. Default: None -H:±CreateJvmShim Create a `jvm` shim for native libraries that link against that library. Default: - (disabled). -H:±DashboardAll In the dashboard dump, include all available information about the native image (this takes precedence over more specific flags). Default: - (disabled). -H:±DashboardBgv Set dashboard to use BGV format for dump. Default: + (enabled). -H:±DashboardCode In the dashboard dump, include the breakdown of the code size across different packages. Default: - (disabled). -H:DashboardDump=... Enable dashboard dumps to the specified file. Default: None -H:±DashboardHeap In the dashboard dump, include the breakdown of the object sizes in the heap across different classes. Default: - (disabled). -H:±DashboardJson Set dashboard to use JSON format for dump. Default: - (disabled). -H:±DashboardPointsTo In the dashboard dump, include the information about the points-to analysis. Default: - (disabled). -H:±DashboardPretty Set dashboard to use pretty print in JSON format. Default: - (disabled). -H:±DeadlockWatchdogExitOnTimeout Exit the image builder VM after printing call stacks. Default: + (enabled). -H:DeadlockWatchdogInterval=10 The interval in minutes between watchdog checks (0 disables the watchdog). -H:DebugCodeInfoMaxDepth=2147483647 Specify maximum inlining depth to consider when building DebugCodeInfo. -H:±DebugCodeInfoUseSourceMappings Do not use SourceMappings for generating DebugCodeInfo (i.e. only use Infopoints). Default: - (disabled). -H:DebugInfoSourceCacheRoot="sources" Directory under which to create source file cache for Application or GraalVM classes. -H:DebugInfoSourceSearchPath=* Search path for source files for application or GraalVM classes (list of comma-separated directories or jar files). -H:±DebugStubsAndSnippets Enable debug output for stub code generation and snippet preparation. Default: - (disabled). -H:DefaultCharset="UTF-8" Default charset of the image, by the default it is the same as the default charset of the image builder. -H:DefaultLocale="en-US" Default locale of the image, by the default it is the same as the default locale of the image builder. -H:DefaultLoopFrequency=100.0 Default frequency for loops with unknown local frequency. -H:DefaultUnswitchFactor=0.7 Default unswitching factor for control split node with unkown profile data. -H:±DeleteLocalSymbols Use linker option to remove all local symbols from image. Default: + (enabled). -H:±DeoptALot Default: - (disabled). -H:±DeoptAfterOSR Deoptimize OSR compiled code when the OSR entry loop is finished if there is no mature profile available for the rest of the method. Default: + (enabled). -H:±DeoptimizeAll Compiles all methods as deoptimization targets for testing. Default: - (disabled). -H:DeoptsToDisableOptimisticOptimization=40 -H:±DetailedAsserts Enable expensive assertions if normal assertions (i.e. -ea or -esa) are enabled. Default: - (disabled). -H:±DetectUserDirectoriesInImageHeap When set to true, the image generator verifies that the image heap does not contain a home directory as a substring. Default: - (disabled). -H:DiagnoseDumpLevel=3 Specify the dump level if CompilationFailureAction#Diagnose is used.See CompilationFailureAction for details. file:doc-files/CompilationFailureActionHelp.txt. -H:DiagnosticBufferSize=30 Specifies the number of entries that diagnostic buffers have. -H:DiagnosticsDir=* Sets the dir where diagnostic information is dumped. -H:±DiagnosticsMode Enables the diagnostic mode. Default: - (disabled). -H:±DisableIntercept Disable intercepting exceptions in debug scopes. Default: - (disabled). -H:DisableIntrinsics=... Disable intrinsics matching the given method filter (see MethodFilter option for details). For example, 'DisableIntrinsics=String.equals' disables intrinsics for any method named 'equals' in a class whose simple name is 'String'. You can append ':verbose' at the end of the filter value to print out disabled intrinsics as they are encountered during compilation (e.g., 'String.equals:verbose'). Default: None -H:±DisableTypeIdResultVerification For internal purposes only. Disables type id result verification even when running with assertions enabled. Default: + (enabled). -H:DisableURLProtocols=* List of comma separated URL protocols that must never be included. -H:Dump=... Filter pattern for specifying scopes in which dumping is enabled. Default: None [Extra help available] -H:±DumpAfterEveryBCI Dump the current graph after every bci to IGV. Default: - (disabled). -H:±DumpEndVersusExitLoopFrequencies Debug flag to dump loop frequency differences computed based on loop end or exit nodes.If the frequencies diverge a lot, this may indicate missing profiles on control flowinside the loop body. Default: - (disabled). -H:±DumpFoldedReflectionElements Dump folded reflection elements. Default: - (disabled). -H:DumpHeap=* Dump the heap at a specific time during image building.The option accepts a list of comma separated phases, any of: during-analysis, after-analysis, before-compilation. -H:±DumpOnError Send compiler IR to dump handlers on error. Default: - (disabled). -H:DumpOnPhaseChange=... Dump a before and after graph if the named phase changes the graph.%nThe argument is substring matched against the simple name of the phase class. Default: None -H:DumpPath="graal_dumps" The directory where various Graal dump files are written. -H:±DumpRuntimeCompilationOnSignal Dumps all runtime compiled methods on SIGUSR2. Default: - (disabled). -H:±DumpTargetInfo Show native-toolchain information and image-build settings. Default: - (disabled). -H:±DumpThreadStacksOnSignal Dumps all thread stacktraces on SIGQUIT/SIGBREAK. Default: - (disabled). -H:±DumpingErrorsAreFatal Treat any exceptions during dumping as fatal. Default: - (disabled). -H:±DynamicCountersPrintGroupSeparator Use grouping separators for number printing. Default: + (enabled). -H:DynamicProxyConfigurationFiles=* One or several (comma-separated) paths to JSON files that specify lists of interfaces that define Java proxy classes. [Extra help available] -H:DynamicProxyConfigurationResources=* Resources describing program elements to be made available for reflection (see ProxyConfigurationFiles). -H:±DynamicProxyTracing Enable trace logging for dynamic proxy. Default: - (disabled). -H:±EagerSnippets Eagerly construct extra snippet info. Default: - (disabled). -H:±EarlyCodeEmissionOrder Enable early code emission order computation instead of late code emission order computation. Default: - (disabled). -H:±EarlyGVN Perform early global value numbering. Default: + (enabled). -H:±EarlyLICM Perform early loop invariant code motion. Default: + (enabled). -H:±EmitStringSubstitutions Emit substitutions for String methods. Default: + (enabled). -H:±EnableAllSecurityServices Add all security service classes to the generated image. Default: - (disabled). -H:±EnableLoggingFeature Enable the feature that provides support for logging. Default: + (enabled). -H:EnableMonitoringFeatures=* Enable monitoring features that allow the VM to be inspected at run time. Comma-separated list can contain 'heapdump', 'jfr', 'jvmstat', 'jmxserver' (experimental), 'jmxclient' (experimental), or 'all' (deprecated behavior: defaults to 'all' if no argument is provided). For example: '--enable-monitoring=heapdump,jfr'. -H:±EnableSecurityServicesFeature Enable automatic registration of security services. Default: + (enabled). -H:EnableURLProtocols=* List of comma separated URL protocols to enable. -H:±EnableWildcardExpansion Enable wildcard expansion in command line arguments on Windows. Default: + (enabled). -H:±EnforceMaxRuntimeCompileMethods Enforce checking of maximum number of methods allowed for runtime compilation. Useful for checking in the gate that the number of methods does not go up without a good reason. Default: - (disabled). -H:EntryPointNamePrefix="" Prefix that is added to the names of entry point methods. -H:ErrorFile="svm_err_b_%t_pid%p.md" If an error occurs, save a build error report to this file [default: svm_err_b_%t_pid%p.md] (%p replaced with pid, %t with timestamp).). -H:±EscapeAnalysisBeforeAnalysis Run partial escape analysis on compiler graphs before static analysis. Default: + (enabled). -H:EscapeAnalysisIterations=2 -H:EscapeAnalysisLoopCutoff=20 -H:EscapeAnalyzeOnly=... Default: None -H:ExactFullUnrollMaxNodes=800 -H:ExactPartialUnrollMaxNodes=200 -H:ExcludeResources=* Regexp to match names of resources to be excluded from the image. -H:±ExhaustiveHeapScan Scan all objects reachable from roots for analysis. By default false. Default: - (disabled). -H:±ExitAfterAnalysis Exit after analysis. Default: - (disabled). -H:±ExitAfterCAPCache Exit image generation after C Annotation Processor Cache creation. Default: - (disabled). -H:±ExitAfterQueryCodeGeneration Output query code for target platform without executing it. Default: - (disabled). -H:±ExitAfterRelocatableImageWrite Exit after writing relocatable file. Default: - (disabled). -H:±ExtendedAsserts Enable extended asserts which slow down analysis. Default: - (disabled). -H:±FailedLoopExplosionIsFatal Do not bail out but throw an exception on failed loop explosion. Default: - (disabled). -H:FallbackExecutorClasspath=... Internal option used to specify Classpath for FallbackExecutor. Default: None -H:FallbackExecutorJavaArg=* Internal option used to specify java arguments for FallbackExecutor. -H:FallbackExecutorMainClass=... Internal option used to specify MainClass for FallbackExecutor. Default: None -H:FallbackExecutorSystemProperty=* Internal option used to specify system properties for FallbackExecutor. -H:FallbackThreshold=5 Define when fallback-image generation should be used. -H:Features=* A comma-separated list of fully qualified Feature implementation classes. -H:±FloatingDivNodes Try to float non-constant division operations to expose global value numbering of divisions. Default: + (enabled). -H:±FoldSecurityManagerGetter Fold SecurityManager getter. Default: + (enabled). -H:±ForceAdversarialLayout Place N-byte constants in the data section such that they are misaligned with respect to N*2. For example, place 4 byte constants at offset 4, 12 or 20, etc. This layout is used to detect instructions that load constants with alignment smaller than the fetch size. For instance, an XORPS instruction that does a 16-byte fetch of a 4-byte float not aligned to 16 bytes will cause a segfault. Default: - (disabled). -H:±ForceExplicitReachabilityFence Force an explicit compiler node for Reference.reachabilityFence, instead of relying on FrameState liveness. Default: - (disabled). -H:±ForceNoROSectionRelocations Use only a writable native image heap (requires ld.gold linker). Default: - (disabled). -H:ForeignConfigurationFiles=* Files describing stubs allowing foreign calls. -H:ForeignResources=* Resources describing stubs allowing foreign calls. -H:±FullUnroll Default: + (enabled). -H:FullUnrollCodeSizeBudgetFactorForLargeGraphs=2.0 Maximum factor by which full unrolling can increase code size for large graphs. The FullUnrollSmallGraphThreshold option determines which graphs are small. -H:FullUnrollCodeSizeBudgetFactorForSmallGraphs=10.0 Maximum factor by which full unrolling can increase code size for small graphs. The FullUnrollSmallGraphThreshold option determines which graphs are small. -H:FullUnrollConstantCompareBoost=15 -H:FullUnrollMaxApplication=60 -H:FullUnrollMaxIterations=600 -H:FullUnrollMaxNodes=700 -H:FullUnrollSmallGraphThreshold=1000 The threshold in terms of NodeSize for a graph to be considered small for the purpose of full unrolling. Applied in conjunction with the FullUnrollCodeSizeBudgetFactorForSmallGraphs and FullUnrollCodeSizeBudgetFactorForLargeGraphs options. -H:GCDebugStartCycle=-1 Start tracing compiled GC barriers after N garbage collections (disabled if N <= 0). -H:±GatherSafepointStatistics Gather statistics about each safepoint. Default: - (disabled). -H:±GenLoopSafepoints Default: + (enabled). -H:±GenerateBuildArtifactsFile Create a build-artifacts.json file in the build directory. The output conforms to the JSON schema located at: docs/reference-manual/native-image/assets/build-artifacts-schema-v0.9.0.json. Default: - (disabled). -H:GenerateDebugInfo=0 Insert debug info into the generated native image or library. -H:±GenericDynamicCounters Turn on the benchmark counters, and displays the results on VM shutdown. Default: - (disabled). -H:±GraalArithmeticStubs Use Graal arithmetic stubs instead of HotSpot stubs where possible. Default: + (enabled). -H:GraalCompileOnly=... A filter applied to a method the VM has selected for compilation by Graal. A method not matching the filter is redirected to a lower tier compiler. The filter format is the same as for the MethodFilter option. Default: None -H:GraphCompressionThreshold=70 Graal graph compression is performed when percent of live nodes falls below this value. -H:±GreyToBlackObjRefDemographics Develop demographics of the object references visited. Serial GC only. Default: - (disabled). -H:±GuaranteeSubstrateTypesLinked Ensure all created SubstrateTypes are linked. Default: - (disabled). -H:±GuardPriorities Default: + (enabled). -H:HeapChunkHeaderPadding=0 Number of bytes at the beginning of each heap chunk that are not used for payload data, i.e., can be freely used as metadata by the heap chunk provider. Serial and epsilon GC only. -H:HeapDumpDefaultFilenamePrefix="svm-heapdump-" A prefix that is used for heap dump filenames if no heap dump filename was specified explicitly. -H:HeapVerifierVerbosity=0 Control heap verifier verbosity level: 0 - quiet, 1 - info, 2 - warning, 3 - all. -H:HotCodeMinSelfTime=0.001 Minimal self time for a compilation unit to be considered hot globally. -H:±HotSpotDeoptExplicitExceptions Testing only option that forces deopts for exception throws. Default: - (disabled). -H:±HotSpotPostOnExceptions Testing only option that forces deopts for exception throws. Default: - (disabled). -H:±HotSpotPrintInlining Print inlining optimizations. Default: - (disabled). -H:±HybridStaticContext Enable hybrid context for static methods, i.e. uses invocation site as context for static methods. Default: - (disabled). -H:±IgnoreMaxHeapSizeWhileInVMOperation Ignore the maximum heap size while a VM operation is executed. Default: - (disabled). -H:ImageBuildID="" Image Build ID is a 128-bit UUID string generated randomly, once per bundle or digest of input args when bundles are not used. -H:±ImageHeapCardMarking Enables card marking for image heap objects, which arranges them in chunks. Automatically enabled when supported. Serial GC only. -H:ImageObjectTreeExpandRoots="" Override the default suppression of specified roots. See: StaticAnalysisReports.md. -H:ImageObjectTreeExpandTypes="" Override the default suppression of specified types. See: StaticAnalysisReports.md. -H:ImageObjectTreeSuppressRoots="" Suppress the expansion of specified roots. See: StaticAnalysisReports.md. -H:ImageObjectTreeSuppressTypes="" Suppress the expansion of specified types. See: StaticAnalysisReports.md. -H:ImageSymbolsPrefix="" Common prefix used by method symbols in image. -H:±IncludeAllLocales Make all hosted locales available at run time. Default: - (disabled). -H:±IncludeAllTimeZones When true, all time zones will be pre-initialized in the image. Default: - (disabled). -H:±IncludeDebugHelperMethods Determines if debugging-specific helper methods are embedded into the image. Those methods can be called directly from the debugger to obtain or print additional information. Default: - (disabled). -H:IncludeLocales=* Comma separated list of locales to be included into the image. The default locale is included in the list automatically if not present. -H:±IncludeMethodData Include a list of methods included in the image for runtime inspection. Default: + (enabled). -H:±IncludeNodeSourcePositions Track NodeSourcePositions during runtime-compilation. Default: - (disabled). -H:IncludeResourceBundles=* Comma separated list of bundles to be included into the image. -H:IncludeResources=* Regexp to match names of resources to be included in the image. -H:IncludeTimeZones="" The time zones, in addition to the default zone of the host, that will be pre-initialized in the image. -H:±IndirectBranchTargetMarker Emit indirect branch target marker instructions. Default: - (disabled). -H:InitialCollectionPolicy="Adaptive" The garbage collection policy, either Adaptive (default) or BySpaceAndTime. Serial GC only. -H:InjectedCompilationDelay=0 The number of seconds by which to slow down each compilation. The compilations slowed down can be restricted with MethodFilter. This option exists to test the compilation watchdog. -H:±Inline Enable inlining. Default: + (enabled). -H:±InlineBeforeAnalysis Inline methods before static analysis. Default: + (enabled). -H:InlineBeforeAnalysisAllowedDepth=20 Maximum call depth for method inlined before static analysis. -H:InlineBeforeAnalysisAllowedInvokes=1 Maximum number of invokes for method inlined before static analysis. -H:InlineBeforeAnalysisAllowedNodes=1 Maximum number of computation nodes for method inlined before static analysis. -H:InlineBeforeAnalysisMethodHandleAllowedInvokes=20 Maximum number of invokes for method handle internals inlined before static analysis. -H:InlineBeforeAnalysisMethodHandleAllowedNodes=100 Maximum number of computation nodes for method handle internals inlined before static analysis. -H:±InlineDuringParsing Inlines trivial methods during bytecode parsing. Default: + (enabled). -H:InlineDuringParsingMaxDepth=10 Maximum depth when inlining during bytecode parsing. -H:±InlineEverything Default: - (disabled). -H:±InlineGraalStubs Embed all the emitted code for Graal-generated stubs. Default: - (disabled). -H:±InlineMegamorphicCalls Inline calls with megamorphic type profile (i.e., not all types could be recorded). Default: + (enabled). -H:±InlineMonomorphicCalls Inline calls with monomorphic type profile. Default: + (enabled). -H:±InlinePartialIntrinsicExitDuringParsing Inlines partial intrinsic exits during bytecode parsing when possible. A partial intrinsic exit is a call within an intrinsic to the method being intrinsified and denotes semantics of the original method that the intrinsic does not support. Default: + (enabled). -H:±InlinePolymorphicCalls Inline calls with polymorphic type profile. Default: + (enabled). -H:±InlineVTableStubs Default: + (enabled). -H:InliningDepthError=1000 Maximum inlining depth during partial evaluation before reporting an infinite recursion. -H:InspectServerContentPath="inspect" Path to the contents of the Inspect web server. -H:±InstallExitHandlers Provide java.lang.Terminator exit handlers. Default: - (disabled). -H:±InterceptBailout Intercept also bailout exceptions. Default: - (disabled). -H:±InternalSymbolsAreGlobal Compatibility option to make symbols used for the image heap global. Using global symbols is problematic for shared libraries because the loader implicitly changes the value when the symbol is already defined in the executable loading the library. Setting this option to true preserves the broken behavior of old Native Image versions. Default: - (disabled). -H:InternalThreadStackSize=2097152 The size of each internal thread stack, in bytes. -H:±Intrinsify Use compiler intrinsifications. Default: + (enabled). -H:IsolatedLoopHeaderAlignment=32 Alignment in bytes for loop header blocks that have no fall through paths. -H:IterativePeelingLimit=2 Allow iterative peeling of loops up to this many times (each time the peeling phase runs). -H:±JNI Enable Java Native Interface (JNI) support. Default: + (enabled). -H:JNIConfigurationFiles=* Files describing program elements to be made accessible via JNI (for syntax, see ReflectionConfigurationFiles). -H:JNIConfigurationResources=* Resources describing program elements to be made accessible via JNI (see JNIConfigurationFiles). -H:±JNIEnhancedErrorCodes JNI functions will return more specific error codes. Default: - (disabled). -H:±JNIExportSymbols Export Invocation API symbols. Default: + (enabled). -H:±JNIVerboseLookupErrors Report information about known JNI elements when lookup fails. Default: - (disabled). -H:±LIRDynMoveProfileMethod Enable dynamic move profiling per method. Default: - (disabled). -H:LIRInstructionVerifierPath=... Path to jar file containing LIR instruction verifier. Default: None -H:±LIROptConstantLoadOptimization Enable constant load optimization. -H:±LIROptControlFlowOptimizer -H:±LIROptEdgeMoveOptimizer -H:±LIROptLSRAEliminateSpillMoves Enable spill move elimination. -H:±LIROptLSRAOptimizeSpillPosition Enable spill position optimization. -H:±LIROptLSStackSlotAllocator Use linear scan stack slot allocation. -H:±LIROptNullCheckOptimizer -H:±LIROptRedundantMoveElimination -H:±LIROptStackMoveOptimizer -H:±LIROptimization Enable LIR level optimizations. Default: + (enabled). -H:±LIRProfileMethods Enables profiling of methods. Default: - (disabled). -H:±LIRProfileMoves Enables profiling of move types on LIR level. Move types are for example stores (register to stack), constant loads (constant to register) or copies (register to register). Default: - (disabled). -H:±LSRAOptSplitOnly LSRA optimization: Only split but do not reassign. Default: - (disabled). -H:±LSRAOptimization Enable LSRA optimization. Default: - (disabled). -H:LargeArrayThreshold=131072 The size at or above which an array will be allocated in its own unaligned chunk. Serial and epsilon GC only. -H:LimitInlinedInvokes=5.0 -H:±LimitObjectArrayLength Enable a limit for the number of objects recorded for each type of a type state before disabling heap sensitivity for that type. The analysis must be heap sensitive. Default: - (disabled). -H:LinkAtBuildTime=* Require types to be fully defined at image build-time. If used without args, all classes in scope of the option are required to be fully defined. [Extra help available] -H:LinkAtBuildTimePaths=* Require all types in given class or module-path entries to be fully defined at image build-time. [Extra help available] -H:LinkerRPath=* Path passed to the linker as the -rpath (list of comma-separated directories). -H:±ListCPUFeatures Show CPU features specific to the target platform and exit. Default: - (disabled). -H:±ListMetrics Lists on the console at VM shutdown the metric names available to the Timers, Counters and MemUseTrackers options. Note that this only lists the metrics that were initialized during the VM execution and so will not include metrics for compiler code that is not executed. Default: - (disabled). -H:±ListModules List observable modules and exit. Default: - (disabled). -H:±LoadExceptionObjectInVM Use a VM runtime call to load and clear the exception object from the thread at the start of a compiled exception handler. Default: - (disabled). -H:LoadProfiles=... Load per compilation profile information. Default: None -H:LocalizationCompressBundles=* Regular expressions matching which bundles should be compressed. -H:±LocalizationCompressInParallel Compress the bundles in parallel. Default: + (enabled). -H:±LocalizationOptimizedMode Optimize the resource bundle lookup using a simple map. Default: - (disabled). -H:±LocalizationSubstituteLoadLookup Store the resource bundle content more efficiently in the fallback mode. Default: + (enabled). -H:Log=... Pattern for specifying scopes in which logging is enabled. See the Dump option for the pattern syntax. Default: None -H:LogFile=... File to which logging is sent. A %p in the name will be replaced with a string identifying the process, usually the process id and %t will be replaced by System.currentTimeMillis(). If the current runtime is in an isolate, then %i will be replaced by '' otherwise %i is removed. An %I is the same as %i except that the replacement is '@'. Using %o as filename sends logging to System.out whereas %e sends logging to System.err. Default: None -H:±LogVerbose Enable more verbose log output when available. Default: - (disabled). -H:LoopExitVsLoopEndFrequencyDiff=1000.0 Scaling factor of frequency difference computed based on loop ends or exits. -H:LoopHeaderAlignment=16 Alignment in bytes for loop header blocks. -H:LoopMaxUnswitch=3 -H:±LoopPeeling Default: + (enabled). -H:±LoopPredication Hoists array bounds checks out of simple loops. This is ignored if SpeculativeGuardMovement is enabled. Default: + (enabled). -H:±LoopPredicationMainPath Restricts LoopPredication to only focus on array bounds checks that dominate the back edge of a loop. Default: + (enabled). -H:±LoopUnswitch Default: + (enabled). -H:LoopUnswitchFrequencyBoost=20.0 Number of nodes allowed for a loop unswitching per loop frequency. The number of nodes allowed for the unswitching is proportional to the relative frequency of the loop by this constant. -H:LoopUnswitchFrequencyMaxFactor=0.95 Maximun value for the frequency factor of an invariant. -H:LoopUnswitchFrequencyMinFactor=0.05 Minimum value for the frequency factor of an invariant. -H:LoopUnswitchMaxIncrease=2000 Maximum loop unswitching code size increase in nodes. -H:LoopUnswitchMinSplitFrequency=1.0 Lower bound for the minimun frequency of an invariant condition to be unswitched. -H:LoopUnswitchTrivial=20 Number of nodes allowed for a loop unswitching regardless of the loop frequency. -H:±MatchExpressions Allow backend to match complex expressions. Default: + (enabled). -H:MaxCallingContextDepth=0 The maximum length of the methods context chains. -H:MaxCallingContextWidth=0 The maximum number of contexts to record for a method. It only affects the analysis when the max and min calling context depth are different. -H:MaxCompilationProblemsPerAction=2 The maximum number of compilation failures to handle with the action specified by CompilationFailureAction before changing to a less verbose action. This does not apply to the ExitVM action. -H:MaxConstantObjectsPerType=0 The maximum number of constant objects recorded for each type before merging the constants into one unique constant object per type. If the value is 0 there is no limit. -H:MaxDuplicationFactor=2.0 Max amount of extra effort to expend handling irreducible loops. A value <= 1 disables support for irreducible loops. -H:MaxHeapContextDepth=0 The maximum length of the context used to model a heap object in addition to the allocation site; used only when ContextSensitiveHeap is enabled. -H:MaxHeapContextWidth=0 The maximum number of contexts to record for a heap object. It only affects the analysis when the max and min calling context depth are different. -H:MaxInvokesInTrivialMethod=1 Maximum number of invokes in a method so that it is considered trivial (for testing only). -H:MaxNodesAfterTrivialInlining=2147483647 The maximum number of nodes in a graph allowed after trivial inlining. -H:MaxNodesInTrivialLeafMethod=40 Maximum number of nodes in a method so that it is considered trivial, if it does not have any invokes. -H:MaxNodesInTrivialMethod=20 Maximum number of nodes in a method so that it is considered trivial. -H:MaxObjectSetSize=100 The maximum number of objects recorded for each type of a type state before disabling heap sensitivity for that type. The analysis must be heap sensitive. It has a minimum value of 1. -H:MaxReachableTypes=-1 Maximum number of types allowed in the image. Used for tests where small number of types is necessary. -H:MaxRuntimeCompileMethods=* Maximum number of methods allowed for runtime compilation. -H:MaxSurvivorSpaces=... Maximum number of survivor spaces. Serial GC only. Default: None -H:MaxTemplatesPerSnippet=50 -H:MaxUnrolledObjectZeroingStores=8 Define the maximum number of stores for which the loop that zeroes out objects is unrolled. -H:MaxUnswitchSuccessors=64 Maximum number of split successors before aborting unswitching. -H:MaximumDesiredSize=20000 Maximum desired size of the compiler graph in nodes. -H:MaximumEscapeAnalysisArrayLength=128 The maximum length of an array that will be escape analyzed. -H:MaximumInliningSize=300 Inlining is explored up to this number of nodes in the graph for each call site. -H:MaximumLoopExplosionCount=10000 Max number of loop explosions per method. -H:MaximumRecursiveInlining=5 Maximum level of recursive inlining. -H:MegamorphicInliningMinMethodProbability=0.33 Minimum probability for methods to be inlined for megamorphic type profiles. -H:MemUseTrackers=... Comma separated names of memory usage trackers that are enabled irrespective of the value for TrackMemUse option. An empty value enables all memory usage trackers unconditionally. Default: None -H:Method="main" Name of the main entry point method. Optional if --shared is used. -H:MethodFilter=... Pattern for matching methods. The syntax for a pattern is:. Default: None [Extra help available] -H:±MethodFilterRootOnly Only check MethodFilter against the root method in the context if true, otherwise check all methods. Default: - (disabled). -H:MethodInlineBailoutLimit=5000 Per-compilation method inlining exploration limit before giving up (use 0 to disable). -H:MetricsFile=... File to which metrics are dumped per compilation. Default: None [Extra help available] -H:MicroArchitecture=... Generate instructions for a specific machine type. Defaults to 'x86-64-v3' on AMD64 and 'armv8-a' on AArch64. Use -march=compatibility for best compatibility, or -march=native for best performance if the native executable is deployed on the same machine or on a machine with the same CPU features. To list all available machine types, use -march=list. Default: None -H:MinCallingContextDepth=0 The minimum length of the methods context chains. -H:MinHeapContextDepth=0 The minimum length of the context used to model a heap object in addition to the allocation site; used only when ContextSensitiveHeap is enabled. -H:MinimalBulkZeroingSize=2048 If applicable, use bulk zeroing instructions when the zeroing size in bytes exceeds this threshold. -H:MinimalGraphNodeSizeCheckSize=1000 Minimal size in NodeSize to check the graph size increases of phases. -H:MinimumPeelFrequency=0.35 -H:MissingRegistrationReportingMode=Throw Select the mode in which the missing reflection registrations will be reported. [Extra help available] -H:Module="" Module containing the class that contains the main entry point. Optional if --shared is used. -H:±MoveGuardsUpwards Move guard nodes to earlier places in the dominator tree if all successors of basic block share a common guard condition. Default: + (enabled). -H:±MultiThreaded Enable support for threads and and thread-local variables (disable for single-threaded implementation). Default: + (enabled). -H:NDCV=0 Run level for NoDeadCodeVerifyHandler (0 = off, 1 = info, 2 = verbose, 3 = fatal). -H:Name="" Name of the output file to be generated. -H:±NativeArchitecture Uses the native architecture, i.e., the architecture of a machine that builds an image. Default: - (disabled). -H:NativeLinkerOption=* Pass the provided raw option that will be appended to the linker command to produce the final binary. The possible options are platform specific and passed through without any validation. -H:NeverInline=* Pattern for disabling inlining of methods during image generation. [Extra help available] -H:±NewCAPCache Create a C Annotation Processor Cache. Will erase any previous cache at that same location. Default: - (disabled). -H:NumberOfAnalysisThreads=-1 The number of threads to use for analysis during native image generation. The number must be smaller than the NumberOfThreads. -H:NumberOfThreads=28 The maximum number of threads to use concurrently during native image generation. -H:ObjdumpExecutables=... Comma separated list of candidate GNU objdump executables. If not specified, disassembling via GNU objdump is disabled. Otherwise, the first existing executable in the list is used. Default: None -H:±OmitHotExceptionStacktrace Default: - (disabled). -H:±OmitInlinedMethodDebugLineInfo Omit generation of DebugLineInfo originating from inlined methods. Default: - (disabled). -H:±OptAssumptions Default: + (enabled). -H:±OptConvertDeoptsToGuards Default: + (enabled). -H:±OptDeoptimizationGrouping Default: + (enabled). -H:±OptDevirtualizeInvokesOptimistically Default: + (enabled). -H:±OptEarlyReadElimination Default: + (enabled). -H:±OptEliminateGuards Default: + (enabled). -H:±OptFloatingReads Default: + (enabled). -H:±OptImplicitNullChecks Default: + (enabled). -H:±OptReadElimination Default: + (enabled). -H:±OptScheduleOutOfLoops Default: + (enabled). -H:±OptStaticFinalFieldFolding Optimize static final fields that get a constant assigned in the class initializer. Default: + (enabled). -H:OptimizationLog=... Enable the structured optimization log and specify where it is printed. Default: None [Extra help available] -H:OptimizationLogPath=... Path to the directory where the optimization log is saved if OptimizationLog is set to Directory. Directories are created if they do no exist. Default: None -H:Optimize="2" Control code optimizations: b - optimize for fastest build time, 0 - no optimizations, 1 - basic optimizations, 2 - advanced optimizations, 3 - all optimizations for best performance. -H:±OptimizeReturnedParameter Analysis: Detect methods that return one of their parameters and hardwire the parameter straight to the return. Default: + (enabled). -H:±OverrideProfiles Allow multiple compilations of the same method by overriding existing profiles. Default: - (disabled). -H:PageSize=0 Define PageSize of a machine that runs the image. The default = 0 (== same as host machine page size). -H:±ParseOnce When true, compiler graphs are parsed only once before static analysis. When false, compiler graphs are parsed for static analysis and again for AOT compilation. Default: + (enabled). -H:±ParseOnceJIT When true, each compiler graph version (DeoptTarget, AOT, JIT) needed for runtime compilation will be separately analyzed during static analysis.When false, only one version of the compiler graph (AOT) will be used in static analysis, and then three new versions will be parsed for compilation. Default: + (enabled). -H:±ParseRuntimeOptions Parse and consume standard options and system properties from the command line arguments when the VM is created. Default: + (enabled). -H:ParsingContextMaxDepth=100 Limit the parsing context depth. Default value is arbitrary set at 100. -H:±PartialEscapeAnalysis Default: + (enabled). -H:±PartialUnroll Default: + (enabled). -H:Path=... Directory of the image file to be generated. Default: None -H:±PeelALot Stress test for the loop peeling optimization by applying it aggressively. Default: - (disabled). -H:PeelOnlyLoopWithNodeID=-1 Peel only the loop with the specific loop begin node ID for debugging purposes. -H:±PerfDataMemoryMappedFile Determines if the collected performance data should be written to a memory-mapped file so that it can be accessed by external tools. Default: + (enabled). -H:±PinnedObjectAddressing Allows the addresses of pinned objects to be passed to other code. Default: + (enabled). -H:±PlatformInterfaceCompatibilityMode Enable the behavior of old GraalVM versions. When enabled, interfaces not available for the current platform are filtered. Default: - (disabled). -H:PredefinedClassesConfigurationFiles=* Files describing predefined classes that can be loaded at runtime according to the schema at https://github.com/oracle/graal/blob/master/docs/reference-manual/native-image/assets/predefined-classes-config-schema-v1.0.0.json. -H:PredefinedClassesConfigurationResources=* Resources describing predefined classes that can be loaded at runtime according to the schema at https://github.com/oracle/graal/blob/master/docs/reference-manual/native-image/assets/predefined-classes-config-schema-v1.0.0.json. -H:±PreferUnsignedComparison Rewrite signed comparisons to unsigned ones if the result is equal. Default: + (enabled). -H:±PreserveFramePointer Saves stack base pointer on the stack on method entry. Default: - (disabled). -H:±PrintAOTCompilation Print logging information during compilation. Default: - (disabled). -H:±PrintAnalysisCallTree Print analysis call tree, a breadth-first tree reduction of the call graph. Default: - (disabled). -H:PrintAnalysisCallTreeType=TXT Change the output format of the analysis call tree, available options are TXT and CSV. See: Reports.md. -H:±PrintAnalysisStatistics Print analysis results statistics. Default: - (disabled). -H:±PrintBBInfo Enables dumping of basic blocks relative PC and frequencies in the dump directory. Default: - (disabled). -H:±PrintBackendCFG Enable dumping scheduled HIR, LIR, register allocation and code generation info to the C1Visualizer. Default: - (disabled). -H:±PrintBlockMapping Enable dumping CFG built during initial BciBlockMapping. Default: - (disabled). -H:±PrintCallEdges Print call edges with other analysis results statistics. Default: - (disabled). -H:PrintCanonicalGraphStringFlavor=0 Choose format used when dumping canonical text for graphs: 0 gives a scheduled graph (better for spotting changes involving the schedule) while 1 gives a CFG containing expressions rooted at fixed nodes (better for spotting small structure differences). -H:±PrintCanonicalGraphStrings Enable dumping canonical text from for graphs. Default: - (disabled). -H:±PrintClassInitialization Prints class initialization info for all classes detected by analysis. Default: - (disabled). -H:±PrintCompilation Print an informational line to the console for each completed compilation. Default: - (disabled). -H:±PrintFeatures Print a list of active features. Default: - (disabled). -H:PrintFlags=... Show available options based on comma-separated option-types (allowed categories: User, Expert, Debug). Default: None -H:PrintFlagsWithExtraHelp=... Print extra help, if available, based on comma-separated option names. Pass * to show all options that contain extra help. Default: None -H:PrintGraph=File Where IdealGraphVisualizer graph dumps triggered by Dump or DumpOnError should be written. [Extra help available] -H:±PrintGraphFile Setting to true sets PrintGraph=file, setting to false sets PrintGraph=network. Default: + (enabled). -H:PrintGraphHost="127.0.0.1" Host part of the address to which graphs are dumped. -H:PrintGraphPort=4445 Port part of the address to which graphs are dumped in binary format. -H:±PrintGraphStateDiff Prints the difference in the graph state caused by each phase of the suite. Default: - (disabled). -H:±PrintGraphWithSchedule Schedule graphs as they are dumped. Default: - (disabled). -H:±PrintHeapHistogram Print class statistics of native image heap. Default: - (disabled). -H:±PrintIRWithLIR Print HIR along side LIR as the latter is generated. Default: - (disabled). -H:±PrintImageElementSizes Print the sizes of the elements of the built image. Default: - (disabled). -H:±PrintImageHeapConnectedComponents A native-image run with the flag `-H:+PrintImageHeapConnectedComponents` will create reports that can help us debug which objects got into the native image heap and why. A component represents a set of objects in the image heap. Default: - (disabled). [Extra help available] -H:±PrintImageHeapPartitionSizes Print the sizes of the native image heap as the image is built. Default: - (disabled). -H:±PrintImageObjectTree Print image object hierarchy. Default: - (disabled). -H:±PrintJNIMethods Print JNI methods added to generated image. Default: - (disabled). -H:±PrintLIRWithAssembly Include the LIR as comments with the final assembly. Default: - (disabled). -H:±PrintLoweringScheduleToTTY Print schedule result pre lowering to TTY. Default: - (disabled). -H:±PrintMethodHistogram Print statistics of methods in native image heap. Default: - (disabled). -H:±PrintPointsToStatistics Report analysis statistics. Default: - (disabled). -H:±PrintProfileLoading Print to stdout when a profile is loaded. Default: - (disabled). -H:±PrintProfilingInformation Print profiling information when parsing a method's bytecode. Default: - (disabled). -H:±PrintRestrictHeapAccessPath Print path for @RestrictHeapAccess warnings. Default: + (enabled). -H:±PrintRestrictHeapAccessWarnings Print warnings for @RestrictHeapAccess annotations. Default: + (enabled). -H:±PrintRuntimeCompilationCallTree Print call tree of methods reachable for runtime compilation. Default: - (disabled). -H:±PrintRuntimeCompileMethods Print methods available for runtime compilation. Default: - (disabled). -H:±PrintSynchronizedAnalysis Print types used for Java synchronization. Default: - (disabled). -H:±PrintUninterruptibleCalleeDOTGraph Print (to stderr) a DOT graph of the @Uninterruptible annotations. Default: - (disabled). -H:±PrintUniverse Print information about classes, methods, and fields that are present in the native image. Default: - (disabled). -H:±PrintUnmodifiedGraphs Dump a graph even if it has not changed since it was last dumped. Change detection is based on adding and deleting nodes or changing inputs. Default: + (enabled). -H:±ProfileAllocations Enable profiling of allocation sites. Default: - (disabled). -H:ProfileAllocationsContext=AllocatingMethod Control the naming and granularity of the counters when using ProfileAllocations. [Extra help available] -H:±ProfileAnalysisOperations Track the progress of the static analysis. Default: - (disabled). -H:±ProfileCompiledMethods Default: - (disabled). -H:±ProfileConstantObjects Track the creation of constant objects. Default: - (disabled). -H:±ProfileDeoptimization Print logging information during object file writing. Default: - (disabled). -H:ProfileMethodFilter=... Restrict saving or loading of profiles based on this filter. See the MethodFilter option for the pattern syntax. Default: None -H:±ProfileMonitors Enable profiling of monitor operations. Default: - (disabled). -H:QueryCodeDir="" Directory where query code for target platform should be output. -H:±RawConditionalElimination Default: + (enabled). -H:ReadEliminationMaxLoopVisits=5 -H:±ReassociateExpressions Re-associate loop invariants and constants. Default: + (enabled). -H:±ReduceDCE Disable optional dead code eliminations. Default: + (enabled). -H:ReflectionConfigurationFiles=* One or several (comma-separated) paths to JSON files that specify which program elements should be made available via reflection. [Extra help available] -H:ReflectionConfigurationResources=* Resources describing program elements to be made available for reflection (see ReflectionConfigurationFiles). -H:±ReflectionPluginTracing Enable trace logging for reflection plugins. Default: - (disabled). -H:RegisterPressure=... Comma separated list of registers that register allocation is limited to. Default: None -H:±RelaxTypeFlowStateConstraints Allow a type flow state to contain types not compatible with its declared type. Default: + (enabled). -H:±RemoveLoopSafepoints Remove safepoints on counted loop ends. Default: + (enabled). -H:±RemoveNeverExecutedCode Default: + (enabled). -H:±RemoveSaturatedTypeFlows Enable the type flow saturation analysis performance optimization. Default: + (enabled). -H:±RemoveUnneededDeoptSupport Remove Deopt(Entries,Anchors,Proxies) determined to be unneeded after the runtime compiled graphs have been finalized. Default: + (enabled). -H:±RemoveUnusedSymbols Use linker option to prevent unreferenced symbols in image. Default: + (enabled). -H:±ReplaceInputsWithConstantsBasedOnStamps Default: + (enabled). -H:ReportAnalysisForbiddenType=* Report error if [:{,}] is discovered during analysis (valid values for UsageKind: InHeap, Allocated, Reachable). -H:±ReportExceptionStackTraces Show exception stack traces for exceptions during image building.). Default: - (disabled). -H:±ReportPerformedSubstitutions Report performed substitutions. Default: - (disabled). -H:±ReportUnsafeOffsetWarnings Print unsafe operation offset warnings.). Default: - (disabled). -H:±ReportUnsupportedElementsAtRuntime Report usage of unsupported methods and fields at run time when they are accessed the first time, instead of as an error during image building. Default: - (disabled). -H:ResourceConfigurationFiles=* Files describing Java resources to be included in the image according to the schema at https://github.com/oracle/graal/blob/master/docs/reference-manual/native-image/assets/resource-config-schema-v1.0.0.json. -H:ResourceConfigurationResources=* Resources describing Java resources to be included in the image according to the schema at https://github.com/oracle/graal/blob/master/docs/reference-manual/native-image/assets/resource-config-schema-v1.0.0.json. -H:±ReturnAfterAnalysis Return after analysis. Default: - (disabled). -H:±RunMainInNewThread Initializes and runs main entry point in a new native thread. Default: - (disabled). -H:±RunReachabilityHandlersConcurrently Run reachability handlers concurrently during analysis. Default: + (enabled). -H:RuntimeAssertions=* Enable or disable Java assert statements at run time. -H:RuntimeCheckedCPUFeatures=* Comma separated list of CPU features that will be enabled for runtime checks. The native image may check at run time if such features are supported by the target CPU, and can optimize certain operations based on this information. If a feature is not supported at run time, a less optimized variant will be executed. Because of the presence of multiple code variants, enabling runtime features can result in larger executables. To completely turn off runtime checked CPU features, set this option to the empty string. The specific options available are target platform dependent. See --list-cpu-features for feature list. The default values are: AMD64: 'AVX,AVX2'; AArch64: ''. -H:±RuntimeCompilationInlineBeforeAnalysis Perform InlineBeforeAnalysis on runtime compiled methods. Default: + (enabled). -H:±RuntimeSystemAssertions Enable or disable Java system assertions at run time. Default: - (disabled). -H:SafepointSamplerStats="" Dump some stats about the safepoint sampler into a file on this path. -H:±SaveProfiles Save per compilation profile information. Default: - (disabled). -H:SaveProfilesPath=... Path for saving compilation profiles. If the value is omitted the debug dump path will be used. Default: None -H:±ScanObjectsParallel Object scanning in parallel. Default: + (enabled). -H:SerializationConfigurationFiles=* One or several (comma-separated) paths to JSON files that specify lists of serialization configurations. [Extra help available] -H:SerializationConfigurationResources=* Resources describing program elements to be made available for serialization (see SerializationConfigurationFiles). -H:SerializationDenyConfigurationFiles=* One or several (comma-separated) paths to JSON files that specify lists of serialization configurations. [Extra help available] -H:SerializationDenyConfigurationResources=* Resources describing program elements that must not be made available for serialization. -H:ServiceLoaderFeatureExcludeServiceProviders=* Comma-separated list of service providers that should be excluded. -H:ServiceLoaderFeatureExcludeServices=* Comma-separated list of services that should be excluded. -H:±SharedLibrary Build shared library. Default: - (disabled). -H:ShowConfiguration=none Writes to the VM log information about the compiler configuration selected. -H:±ShowDumpFiles Print the name of each dump file path as it's created. Default: - (disabled). -H:±ShowSubstitutionSourceInfo Controls whether the source position information of snippets and method substitutions are exposed to HotSpot. Can be useful when profiling to get more precise position information. Default: - (disabled). -H:±SignalHandlerBasedExecutionSampler Determines if JFR uses a signal handler for execution sampling. Default: - (disabled). -H:±SimpleFastInflatedLocking Handle simple cases for inflated monitors in the fast-path. Default: + (enabled). -H:±SimulateClassInitializer Simulate the effects of class initializer at image build time, to avoid class initialization at run time. Default: + (enabled). -H:±SimulateClassInitializerCollectAllReasons Configuration for SimulateClassInitializer: Collect all reasons why a class initializer cannot be simulated. Default: - (disabled). -H:SimulateClassInitializerMaxAllocatedBytes=40000 Configuration for SimulateClassInitializer: Maximum number of bytes allocated in the image heap for each class initializer. -H:SimulateClassInitializerMaxInlineDepth=200 Configuration for SimulateClassInitializer: Maximum inlining depth during simulation. -H:SimulateClassInitializerMaxLoopIterations=2000 Configuration for SimulateClassInitializer: Maximum number of loop iterations that are unrolled during simulation. -H:SmallCompiledLowLevelGraphSize=330 If the previous low-level graph size of the method exceeds the threshold, it is not inlined. -H:±SnippetCounters Enable counters for various paths in snippets. Default: - (disabled). -H:SoftRefLRUPolicyMSPerMB=1000 This number of milliseconds multiplied by the free heap memory in MByte is the time span for which a soft reference will keep its referent alive after its last access. Serial GC only. -H:±SourceLevelDebug Preserve the local variable information for every Java source line to allow line-by-line stepping in the debugger. Allow the lookup of Java-level method information, e.g., in stack traces. Default: - (disabled). -H:SourceLevelDebugFilter=* Constrain debug info generation to the comma-separated list of package prefixes given to this option. -H:±SpawnIsolates Support multiple isolates. Default: + (enabled). -H:SpectrePHTBarriers=None Select a strategy to mitigate speculative bounds check bypass (aka Spectre-PHT or Spectre V1). [Extra help available] -H:±SpectrePHTIndexMasking Mask indices to scope access to allocation size after bounds check. Default: - (disabled). -H:±SpeculativeExecutionBarriers Stop speculative execution on all branch targets with execution barrier instructions. Default: - (disabled). -H:±SpeculativeGuardMovement Move loop invariant guards (e.g., array bounds checks) out of loops. Default: + (enabled). -H:StackRedZoneSize=8192 Size (in bytes) of the red zone reserved at the end of the stack. This stack space can only be used by critical VM code and C code, e.g., to report fatal errors. -H:±StackTrace Deprecated, has no effect. Default: + (enabled). -H:StackYellowZoneSize=32768 Size (in bytes) of the yellow zone reserved at the end of the stack. This stack space is reserved for VM use and cannot be used by the application. -H:±StaticExecutable Build statically linked executable (requires static libc and zlib). Default: - (disabled). -H:±StaticExecutableWithDynamicLibC Builds a statically linked executable with libc dynamically linked. Default: - (disabled). -H:±StrengthenGraphWithConstants Perform constant folding in StrengthenGraphs. Default: + (enabled). -H:±StressExplicitExceptionCode Stress the code emitting explicit exception throwing code. Default: - (disabled). -H:±StressInvokeWithExceptionNode Stress the code emitting invokes with explicit exception edges. Default: - (disabled). -H:±StressTestEarlyReads Stress the code by emitting reads at earliest instead of latest point. Default: - (disabled). -H:±StrictConfiguration When configuration files do not match their schema, abort the image build instead of emitting a warning. Default: - (disabled). -H:±StrictDeoptInsertionChecks Perform checks that guards and deopts aren't introduced in graphs that should handle exceptions explicitly. Default: - (disabled). -H:±StrictImageHeap Enable the strict image heap mode that allows all classes to be used at build-time but also requires types of all objects in the heap to be explicitly marked for build-time initialization. Default: - (disabled). -H:±StrictProfiles Throw an error if an attempt is made to overwrite/update a profile loaded from disk. Default: + (enabled). -H:±StrictQueryCodeCompilation Use strict checks when performing query code compilation. Default: + (enabled). -H:StringIndexOfConstantLimit=4096 String.indexOf invocations will be evaluated at compile time if the receiver is a constant and its length is smaller than this value. -H:±StripDebugInfo Use a separate file for debug info. Default: + (enabled). -H:±SupportCompileInIsolates Support runtime compilation in separate isolates (enable at runtime with option CompileInIsolates). -H:±SupportJsrBytecodes Default: + (enabled). -H:±SupportOSRWithLocks Support OSR compilations with locks. If DeoptAfterOSR is true we can per definition not have unbalanced enter/exits mappings. If DeoptAfterOSR is false insert artificial monitor enters after the OSRStart to have balanced enter/exits in the graph. Default: + (enabled). -H:±SupportPredefinedClasses Enable support for predefining additional classes. Default: + (enabled). -H:±SupportRecurringCallback Support a per-thread timer that is called at a specific interval. Default: + (enabled). -H:±SuppressStderr Suppress console error output for unittests. Default: - (disabled). -H:±SuppressStdout Suppress console normal output for unittests. Default: - (disabled). -H:SystemicCompilationFailureRate=1 Compilation failure rate indicating a systemic compilation problem that will issue a warning. The value is made absolute and clamped to produce P, a value between 0 and 100. Systemic failure is detected if the percent of failing compilations in a sliding time window >= P. A negative value will cause the VM to exit after issuing the warning. Set to 0 to disable systemic compilation problem detection. -H:TargetPlatform="" Selects native-image compilation target (in - format). Defaults to host's OS-architecture pair. -H:TempDirectory=* Directory for temporary files generated during native image generation. If this option is specified, the temporary files are not deleted so that you can inspect them after native image generation. -H:±ThrowLinkAtBuildTimeIOExceptions Instead of warning, throw IOExceptions for link-at-build-time resources at build time. Default: - (disabled). -H:ThrowMissingRegistrationErrors=* Throw Native Image-specific errors when trying to access an element that has not been registered. [Extra help available] -H:ThrowMissingRegistrationErrorsPaths=* Trigger missing registration errors from all types in the given class or module-path entries. [Extra help available] -H:±ThrowUnsafeOffsetErrors Throw unsafe operation offset errors.). Default: + (enabled). -H:Time=... Pattern for specifying scopes in which timing is enabled. See the Dump option for the pattern syntax. An empty value enables all timers unconditionally. Default: None -H:TimedDynamicCounters=-1 Turn on the benchmark counters, and displays the results every n milliseconds. -H:Timers=... Comma separated names of timers that are enabled irrespective of the value for Time option. An empty value enables all timers unconditionally. Default: None -H:TraceBytecodeParserLevel=0 The trace level for the bytecode parser. A value of 1 enables instruction tracing and any greater value emits a frame state trace just prior to each instruction trace.Instruction tracing output from multiple compiler threads will be interleaved so use of this option make most sense for single threaded compilation. The MethodFilter option can be used to refine tracing to selected methods. -H:TraceClassInitialization=* Comma-separated list of fully-qualified class names that class initialization is traced for. -H:±TraceEscapeAnalysis Default: - (disabled). -H:±TraceExceptionHandlerStub Trace execution of stub used to handle an exception thrown by a callee. Default: - (disabled). -H:±TraceInlineDuringParsing Traces inlining performed during bytecode parsing. Default: - (disabled). -H:±TraceInlining Enable tracing of inlining decisions. Default: - (disabled). [Extra help available] -H:±TraceInliningForStubsAndSnippets Enable inlining decision tracing in stubs and snippets. Default: - (disabled). -H:TraceLIRGeneratorLevel=0 The trace level for the LIR generator. -H:±TraceLocalizationFeature When enabled, localization feature details are printed. Default: - (disabled). -H:±TraceLoggingFeature When enabled, logging feature details are printed. Default: - (disabled). -H:TraceMonitorsMethodFilter=... Trace monitor operations in methods whose fully qualified name contains this substring. Default: None -H:TraceMonitorsTypeFilter=... Trace monitor operations on objects whose type contains this substring. Default: None -H:±TraceNativeToolUsage Trace all native tool invocations as part of image building. Default: - (disabled). -H:TraceObjectInstantiation=* Comma-separated list of fully-qualified class names that object instantiation is traced for. -H:±TraceParserPlugins Traces use of plugins during bytecode parsing. Default: - (disabled). -H:±TraceSecurityServices Enable tracing of security services automatic registration. Default: - (disabled). -H:±TraceUnwindStub Trace execution of the stub that routes an exception to a handler in the calling frame. Default: - (disabled). -H:±TraceVMOperations Trace VMOperation execution. Default: - (disabled). -H:±TrackAccessChain Track the callers for methods and accessing methods for fields. Default: - (disabled). -H:±TrackInputFlows Track the input for type flows. Default: - (disabled). -H:TrackMemUse=... Pattern for specifying scopes in which memory use tracking is enabled. See the Dump option for the pattern syntax. An empty value enables all memory use trackers unconditionally. Default: None -H:±TrackNodeInsertion Track source stack trace where a node was inserted into the graph. Default: - (disabled). -H:±TrackNodeSourcePosition Track the NodeSourcePosition. Default: - (disabled). -H:±TreatRuntimeCodeInfoReferencesAsWeak Determines if references from runtime-compiled code to Java heap objects should be treated as strong or weak. Default: + (enabled). -H:TrivialInliningSize=10 Graphs with less than this number of nodes are trivial and therefore always inlined. -H:TruffleCompilerConfiguration=... Select a compiler configuration for Truffle compilation (default: use Graal system compiler configuration). Default: None -H:±TruffleHostInlining Whether Truffle host inlining is enabled. Default: + (enabled). -H:TruffleHostInliningBaseBudget=5000 Maximum budget for Truffle host inlining for runtime compiled methods. -H:TruffleHostInliningByteCodeInterpreterBudget=100000 Maximum budget for Truffle host inlining for runtime compiled methods with a BytecodeInterpreterSwitch annotation. -H:TruffleHostInliningMaxExplorationDepth=1000 Determines the maximum call depth for exploration during host inlining. -H:TruffleHostInliningMaxSubtreeInvokes=20 Maximum number of subtree invokes for a subtree to get inlined until it is considered too complex. -H:TruffleHostInliningMinFrequency=0.001 Minimum relative frequency for calls to get inlined. Default 0.001 on HotSpot and no minimum frequency on SVM. -H:±TruffleHostInliningPrintExplored When logging is activated for this phase enables printing of only explored, but ultimately not inlined call trees. Default: - (disabled). -H:±TruffleImmutableFrameFields Whether Truffle should mark final frame fields as immutable. Default: + (enabled). -H:±TruffleTrustedNonNullCast Whether Truffle trusted non-null casts are enabled. Default: + (enabled). -H:±TruffleTrustedTypeCast Whether Truffle trusted type casts are enabled. Default: + (enabled). -H:±TrustFinalDefaultFields Determines whether to treat final fields with default values as constant. Default: + (enabled). -H:TypeCheckMaxHints=2 The maximum number of profiled types that will be used when compiling a profiled type check. Note that TypeCheckMinProfileHitProbability also influences whether profiling info is used in compiled type checks. -H:TypeCheckMinProfileHitProbability=0.5 If the probability that a type check will hit one the profiled types (up to TypeCheckMaxHints) is below this value, the type check will be compiled without profiling info. -H:TypeFlowSaturationCutoff=20 The maximum number of types recorded in a type flow. -1 indicates no limitation. -H:±UnlockExperimentalVMOptions Enable and disable normal processing of flags relating to experimental options. Default: - (disabled). -H:±UnresolvedIsError Report unresolved elements as errors. Default: + (enabled). -H:UnrollMaxIterations=16 -H:UnsafeAutomaticSubstitutionsLogLevel=1 Unsafe automatic substitutions logging level: Disabled=0, Basic=1, Info=2, Debug=3.). -H:±UnsafeOffsetWarningsAreFatal Print unsafe operation offset warnings.). Default: - (disabled). -H:±UseApplicationCodeSourceLocation Return the application path as the Class.getProtectionDomain().getCodeSource().getLocation() for all classes that have no explicit ProtectionDomain. -H:±UseBranchesWithin32ByteBoundary Force branch instructions to align with 32-bytes boundary, to mitigate the jcc erratum. See https://www.intel.com/content/dam/support/us/en/documents/processors/mitigations-jump-conditional-code-erratum.pdf for more details. If not set explicitly, the default value will be determined according to the CPU model. Default: - (disabled). -H:±UseCAPCache Indicate the C Annotation Processor to use previously cached native information when generating C Type information. Default: - (disabled). -H:±UseCalleeSavedRegisters Use callee saved registers to reduce spilling for low-frequency calls to stubs (if callee saved registers are supported by the architecture). Default: + (enabled). -H:±UseCompilationStatistics Enables CompilationStatistics. Default: - (disabled). -H:±UseContainerSupport Enable detection and runtime container configuration support. Default: + (enabled). -H:±UseDedicatedVMOperationThread Determines if VM operations should be executed in a dedicated thread. Default: - (disabled). -H:±UseDirectCallTrampolinesALot Force many trampolines to be needed for inter-method calls. Normally trampolines are only used when a method destination is outside the range of a pc-relative branch instruction. Default: - (disabled). -H:±UseEpsilonGC Use a no-op GC. Default: - (disabled). -H:±UseExceptionProbability Default: + (enabled). -H:±UseExperimentalReachabilityAnalysis Use experimental Reachability Analysis instead of points-to. Default: - (disabled). -H:±UseImagebuildDebugSections Emit debuginfo debug.svm.imagebuild.* sections with detailed image-build options. Default: + (enabled). -H:UseLibC=... Selects the libc implementation to use. Available implementations: glibc, musl, bionic. Default: None -H:±UseLoopEndFrequencies Derive loop frequencies only from backedge frequencies instead of from loop exit frequencies. Default: - (disabled). -H:±UseLoopLimitChecks Default: + (enabled). -H:±UseNullRegion Determines if a null region is present between the heap base and the image heap. Default: + (enabled). -H:±UseOldMethodHandleIntrinsics Force using legacy method handle intrinsics. Default: - (disabled). -H:±UseReachabilityMethodSummaries Use method summaries for Reachability Analysis. Default: - (disabled). -H:±UseRememberedSet Determines if a remembered sets is used, which is necessary for collecting the young and old generation independently. Default: + (enabled). -H:±UseSerialGC Use a serial GC. Default: + (enabled). -H:±UseServiceLoaderFeature Automatically register services for run-time lookup using ServiceLoader. Default: + (enabled). -H:±UseSnippetGraphCache Use a cache for snippet graphs. Default: + (enabled). -H:±UseSnippetTemplateCache Use a LRU cache for snippet templates. Default: + (enabled). -H:±UseTrappingNullChecks Use traps for null checks instead of explicit null-checks. Default: + (enabled). -H:±UseTypeCheckHints Default: + (enabled). -H:Verify=... Pattern for specifying scopes in which logging is enabled. See the Dump option for the pattern syntax. Default: None -H:±VerifyAfterGC Verify the heap after doing a garbage collection if VerifyHeap is enabled. Serial GC only. Default: + (enabled). -H:±VerifyBalancedMonitors Emit extra code to dynamically check monitor operations are balanced. Default: - (disabled). -H:±VerifyBeforeGC Verify the heap before doing a garbage collection if VerifyHeap is enabled. Serial GC only. Default: + (enabled). -H:±VerifyDeoptimizationEntryPoints Verify that all possible deoptimization entry points have been properly compiled and registered in the metadata. Default: - (disabled). -H:±VerifyGraalGraphEdges Perform expensive verification of graph inputs, usages, successors and predecessors. Default: - (disabled). -H:±VerifyGraalGraphs Verify graphs often during compilation when assertions are turned on. Default: + (enabled). -H:±VerifyGraalPhasesSize Verify before - after relation of the relative, computed, code size of a graph. Default: - (disabled). -H:±VerifyHeap Verify the heap before and after each collection. Default: - (disabled). -H:±VerifyHeapAtReturn Perform platform dependent validation of the Java heap at returns. Default: - (disabled). -H:±VerifyKillCFGUnusedNodes Verify that there are no new unused nodes when performing killCFG. Default: - (disabled). -H:±VerifyNamingConventions Verify naming conventions during image construction. Default: - (disabled). -H:±VerifyPhases Default: - (disabled). -H:±VerifyReferences Verify all object references if VerifyHeap is enabled. Serial GC only. Default: + (enabled). -H:±VerifyReferencesPointIntoValidChunk Verify that object references point into valid heap chunks if VerifyHeap is enabled. Serial GC only. Default: - (disabled). -H:±VerifyRememberedSet Verify the remembered set if VerifyHeap is enabled. Serial GC only. Default: + (enabled). -H:±VerifyTypes Verify type states computed by the static analysis at run time. This is useful when diagnosing problems in the static analysis, but reduces peak performance significantly. Default: - (disabled). -H:±VerifyWriteBarriers Verify write barriers. Serial GC only. Default: - (disabled). -H:±WarnAboutCodeSignatureMismatch Print to stdout when a compilation performed with different profiles generates different backend code. Default: + (enabled). -H:±WarnAboutGraphSignatureMismatch Print to stdout when a compilation performed with different profiles generates different frontend IR. Default: + (enabled). -H:±WarnAboutMissingReflectionOrJNIMetadataElements Warn when reflection and JNI configuration files have elements that could not be found on the classpath or modulepath. Default: - (disabled). -H:±WarnAboutNotCachedLoadedAccess Print to stdout when requesting profiling info not present in a loaded profile. Default: + (enabled). -H:±WarnMissingIntrinsic Print a warning when a missing intrinsic is seen. Default: - (disabled). -H:±ZapChunks Fill unused memory chunks with a sentinel value. Serial and epsilon GC only. Default: - (disabled). -H:±ZapConsumedHeapChunks After use, Fill memory chunks with a sentinel value. Serial and epsilon GC only. Default: - (disabled). -H:±ZapProducedHeapChunks Before use, fill memory chunks with a sentinel value. Serial and epsilon GC only. Default: - (disabled). -H:±ZapStackOnMethodEntry Default: - (disabled). ```

[Athou]

I don't think you need the -H: part, according to example given in the documentation:

On Linux it’s possible to package a native executable that doesn’t depend on any system shared library. There are some system requirements to be fulfilled and additional build arguments to be used along with the native-image invocation, a minimum is -Dquarkus.native.additional-build-args="--static","--libc=musl".

So this should work

./mvnw clean package -Pmariadb -Pnative -DskipTests -Dquarkus.native.additional-build-args="--parallelism=1"

[dcelasun]

That does indeed work, though it seems minimum value is 2 for --parallelism. Thanks for the help :)