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Minimal Value Types flags:
| Flag | Description | |
|---|---|---|
| javac | ||
| -Xlint:values | Lint category for warnings associated to bad usage of value capable classes - examples:
| |
| java | ||
| -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES | Boolean value, default value is `false` into a directory named DUMP_CLASS_FILES under the current directory. | |
| -Dvalhalla.enableValueLambdaForms | Boolean value, default value is `true` and value-type specific byte code will be generated. | |
| -Dvalhalla.dumpProxyClasses | Boolean value, default value is `false` If true, dumps MVT lambda forms. | |
| -Dvalhalla.enablePoolPatches | Boolean value, default value is `false` will generate byte code with constant pool patching where appropriate. | |
| hotspot | ||
| REQUIRED | -XX:EnableMVT | Boolean value, default value is `false` If true enable support for minimal value types with a value capable class and an associated derived value type. |
| REQUIRED | -XVerify:none | Disable verification. Verification is not yet supported. |
| -XX:ValueArrayFlatten | Boolean value, default value is `true` Flatten arrays of values, if possible | |
| -XX:ValueArrayElemMaxFlatSize | Integer value, default is -1 Max size for flattening an array of values, < 0 means no limit | |
| -XX:ValueArrayElemMaxFlatOops | Integer value, default is 4 Max number of embedded object references in value type to flatten in an array, < 0 means no limit | |
| -XX:BigValueTypeThreshold | size_t value in bytes, default is 4 * BytesPerLong Max value type size for interpreter buffering of local variable table entries | |
| -XX:ValueTypesBufferMaxMemory | Integer value, default 128 (pages) Max memory used for value type buffers | |
| -XX:ValueTypesThreadLocalRecycling | Boolean value, default value is 'true' Enable thread local recycling of buffered values in the interpreter | |
| -XX:MinimumVTBufferChunkPerFrame | Integer value, default 2 Minimum number of VT buffer chunks allowed per frame | |
| -XX:ReportVTBufferRecyclingTimes | Boolean value, default false Print duration of each VTBuffer recycling for the interpreter | |
| -XX:ValueTypePassFieldsAsArgs | Non-product: Boolean value, default value is `true` Pass each value type field as an argument to a method call instead of a value type reference | |
| -XX:ValueTypeReturnedAsFields | Non-product: Boolean value, default value is `true` Return value type fields instead of a value type reference | |
| -XX:ValueArrayAtomicAccess | Boolean value, default value is `false` Enable atomic access to values in an array, by treating value types as references. | |
| -XX:-UseTLAB | To see heap allocations which do not use optimized Thread Local Allocation Buffers | |
| -XX:+PrintEliminateAllocations | Non-product builds: Print out when allocations are eliminated | |
| -XX:+PrintEscapeAnalysis | Non-product builds: Print results of escape analysis (e.g. if you believe boxing was not eliminated) | |
| java | ||
| -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES | Boolean value, default value is `false` into a directory named DUMP_CLASS_FILES under the current directory. | |
| -Dvalhalla.enableValueLambdaForms | Boolean value, default value is `true` and value-type specific byte code will be generated. | |
| -Dvalhalla.dumpProxyClasses | Boolean value, default value is `false` If true, dumps MVT lambda forms. | |
| -Dvalhalla.enablePoolPatches | Boolean value, default value is `false` will generate byte code with constant pool patching where appropriate. | |
| javac | ||
| -Xlint:values | Lint category for warnings associated to bad usage of value capable classes - examples:
|
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