[GR-51945] [GR-71030] [GR-71031] Add BytecodeDescriptor. Add InstructionTracer. #12435
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…s parsing, (de)serialization, and instruction introspection; added instruction-level dynamic tracing via InstructionTracer and engine options engine.TraceBytecode, engine.BytecodeHistogram; added BytecodeDescriptor.update(Language, BytecodeConfig) to apply bytecode configuration (e.g. instrumentation, source info) to all existing and future roots for a language.
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MyBytecodeRootNodeGen.Bytecodeclass that can be accessed via theMyBytecodeRootNodeGen.BYTECODEsingleton. This new class allows you to parse, serialize, deserialize, and bytecode nodes in addition to the already existing static methods in the generated code.InstructionDescriptorgenerated implementation for the bytecode interpreter. The instructions can be accessed via the new BytecodeDescriptor like this:MyBytecodeRootNodeGen.BYTECODE.getInstructionDescriptors(). There is alsoMyBytecodeRootNodeGen.BYTECODE.dump()to produce a human-readable instruction format.BytecodeDescriptor.update(MyLanguage, BytecodeConfig)to update the bytecode config for all current and root nodes created in the future of a language.InstructionTracerwithonInstructionEnter(InstructionAccess, BytecodeNode, int, Frame). Tracers can be attached per root viaBytecodeRootNodes.addInstructionTracer(InstructionTracer)and per descriptor viaBytecodeDescriptor.addInstructionTracer(TruffleLanguage, InstructionTracer). Attaching a tracer invalidates affected roots and may trigger reparse and comes at a significant cost.PrintInstructionTracerandInstructionHistogramTracer. These are intended for diagnostics.engine.TraceBytecodeto enable printing each executed Bytecode DSL instruction. Use theengine.BytecodeMethodFilteroption to print instructions only for a given method.engine.BytecodeHistogramto enable printing a bytecode histogram on engine close. Useengine.BytecodeHistogramIntervalto configure the interval at which the histogram is reset and printed.