Enhance logging of stubs through the PerfMap on Linux #113943
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davidwrighton
commented
Mar 26, 2025
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davidwrighton
commented
- Add reporting for all of the stub types that I am aware which are used on Linux
- Unboxing stubs
- Instantiating stubs
- Delegate shuffle thunks
- FixupPrecode
- StubPrecode
- DynamicHelpers for R2R
- CallCounting stubs
- Jump stubs
- Add support for a less granular stub reporting model as the default (which is MUCH more suitable for the StubPrecode and FixupPrecode model). Its slightly less accurate on the type of stub, but it should make the impact of adding those stubs to the maps much less. Some stubs do not yet have reporting in fully granular mode, but I believe I've captured the critical ones there too.
- DOTNET_PerfMapStubGranularity .... set this to 0 for minimum granularity of stub reporting, and to 3 for maximum. I don't believe that documenting the details of this switch are necessary at this time, but I wanted to have some control in case I was wrong about the cost of reduced granularity
- Add support for recording the location of the copy of the writer barriers into the heap. This enables support for good perfmap data in W^X mode
- Add reporting for all of the stub types that I am aware which are used on Linux - Unboxing stubs - Instantiating stubs - Delegate shuffle thunks - FixupPrecode - StubPrecode - DynamicHelpers for R2R - CallCounting stubs - Jump stubs - Add support for a less granular stub reporting model (which is MUCH more suitable for the StubPrecode and FixupPrecode model). Its slightly less accurate on the type of stub, but it should make the impact of adding those stubs to the maps much less. Some stubs do not yet have reporting in fully granular mode, but I believe I've captured the critical ones there too. - Add support for recording the location of the copy of the writer barriers into the heap. This enables support for good perfmap data in W^X mode
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- src/coreclr/inc/clrconfigvalues.h: Language not supported
- src/coreclr/utilcode/loaderheap.cpp: Language not supported
- src/coreclr/vm/amd64/cgenamd64.cpp: Language not supported
- src/coreclr/vm/arm/stubs.cpp: Language not supported
- src/coreclr/vm/arm64/stubs.cpp: Language not supported
- src/coreclr/vm/ceemain.cpp: Language not supported
- src/coreclr/vm/codeman.cpp: Language not supported
- src/coreclr/vm/codeman.h: Language not supported
- src/coreclr/vm/comdelegate.cpp: Language not supported
- src/coreclr/vm/dllimportcallback.cpp: Language not supported
- src/coreclr/vm/i386/cgenx86.cpp: Language not supported
- src/coreclr/vm/i386/jitinterfacex86.cpp: Language not supported
- src/coreclr/vm/loaderallocator.hpp: Language not supported
- src/coreclr/vm/loongarch64/stubs.cpp: Language not supported
- src/coreclr/vm/perfmap.cpp: Language not supported
- src/coreclr/vm/perfmap.h: Language not supported
- src/coreclr/vm/precode.cpp: Language not supported
- src/coreclr/vm/prestub.cpp: Language not supported
- src/coreclr/vm/readytoruninfo.cpp: Language not supported
- src/coreclr/vm/riscv64/stubs.cpp: Language not supported
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This was referenced Mar 27, 2025
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