Module wasmtime_jit_debug::perf_jitdump

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Support for jitdump files which can be used by perf for profiling jitted code. Spec definitions for the output format is as described here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/perf/Documentation/jitdump-specification.txt

Usage Example: Record sudo perf record -k 1 -e instructions:u target/debug/wasmtime -g –profile=jitdump test.wasm Combine sudo perf inject -v -j -i perf.data -o perf.jit.data Report sudo perf report -i perf.jit.data -F+period,srcline

Structs§

  • CodeLoadRecord
    The CodeLoadRecord is used for describing jitted functions
  • DebugEntry
    Describes source line information for a jitted function
  • DebugInfoRecord
    Describes debug information for a jitted function. An array of debug entries are appended to this record during writting. Note, this record must preceed the code load record that describes the same jitted function.
  • FileHeader
    Fixed-sized header for each jitdump file
  • JitDumpFile
    Interface for driving the creation of jitdump files
  • RecordHeader
    Each record starts with this fixed size record header which describes the record that follows

Enums§