Created attachment 1681165 [details]
codegencommon-5bf5d9.sh

I've attached the files that are mentioned in the crash message.

Thanks Tom for the report. could you attach the preprocessed file to this bug? it's likely to be the output of

/usr/bin/clang-9 -E -D DEBUGGING_SUPPORTED -D DISABLE_CONTRACTS -D FEATURE_ARRAYSTUB_AS_IL -D FEATURE_BASICFREEZE -D FEATURE_CODE_VERSIONING -D FEATURE_COLLECTIBLE_TYPES -D FEATURE_CORECLR -D FEATURE_CORESYSTEM -D FEATURE_CORRUPTING_EXCEPTIONS -D FEATURE_DBGIPC_TRANSPORT_DI -D FEATURE_DBGIPC_TRANSPORT_VM -D FEATURE_DEFAULT_INTERFACES -D FEATURE_EH_FUNCLETS -D FEATURE_EVENTSOURCE_XPLAT -D FEATURE_EVENT_TRACE -D FEATURE_HIJACK -D FEATURE_HW_INTRINSICS -D FEATURE_ICASTABLE -D FEATURE_INSTANTIATINGSTUB_AS_IL -D FEATURE_ISYM_READER -D FEATURE_MANAGED_ETW -D FEATURE_MANAGED_ETW_CHANNELS -D FEATURE_MANUALLY_MANAGED_CARD_BUNDLES -D FEATURE_MULTICASTSTUB_AS_IL -D FEATURE_MULTICOREJIT -D FEATURE_MULTIREG_RETURN -D FEATURE_NO_HOST -D FEATURE_ON_STACK_REPLACEMENT -D FEATURE_PAL_ANSI -D FEATURE_PERFMAP -D FEATURE_PERFTRACING -D FEATURE_PORTABLE_SHUFFLE_THUNKS -D FEATURE_PROFAPI_ATTACH_DETACH -D FEATURE_READYTORUN -D FEATURE_READYTORUN_COMPILER -D FEATURE_REJIT -D FEATURE_REMOTE_PROC_MEM -D FEATURE_SIMD -D FEATURE_STANDALONE_GC -D FEATURE_STUBS_AS_IL -D FEATURE_SVR_GC -D FEATURE_SYMDIFF -D FEATURE_TIERED_COMPILATION -D FEATURE_USE_ASM_GC_WRITE_BARRIERS -D FEATURE_USE_SOFTWARE_WRITE_WATCH_FOR_GC_HEAP -D FEATURE_UTF8STRING -D FEATURE_WINMD_RESILIENT -D HOST_64BIT -D HOST_AMD64 -D HOST_UNIX -D JIT_BUILD -D NDEBUG -D PROFILING_SUPPORTED -D SELF_NO_HOST -D TARGET_64BIT -D TARGET_AMD64 -D TARGET_LINUX -D TARGET_UNIX -D UNICODE -D UNIX_AMD64_ABI -D UNIX_AMD64_ABI_ITF -D URTBLDENV_FRIENDLY=Retail -D _BLD_CLR -D _SECURE_SCL=0 -D _UNICODE -D clrjit_EXPORTS -I /home/tmds/repos/runtime/artifacts/obj/coreclr/Linux.x64.Release/src/jit/standalone -I /home/tmds/repos/runtime/src/coreclr/src/jit/standalone -I /home/tmds/repos/runtime/src/coreclr/src/pal/prebuilt/inc -I /home/tmds/repos/runtime/src/coreclr/../../artifacts/obj/coreclr -I /home/tmds/repos/runtime/src/coreclr/src/pal/inc -I /home/tmds/repos/runtime/src/coreclr/src/pal/inc/rt -I /home/tmds/repos/runtime/src/coreclr/src/pal/src/safecrt -I /home/tmds/repos/runtime/src/coreclr/src/inc -I /home/tmds/repos/runtime/src/coreclr/src/inc/winrt -I /home/tmds/repos/runtime/src/coreclr/src/debug/inc -I /home/tmds/repos/runtime/src/coreclr/src/debug/inc/amd64 -I /home/tmds/repos/runtime/src/coreclr/src/debug/inc/dump -I /home/tmds/repos/runtime/src/coreclr/src/md/inc -I /home/tmds/repos/runtime/src/coreclr/src/classlibnative/bcltype -I /home/tmds/repos/runtime/src/coreclr/src/classlibnative/cryptography -I /home/tmds/repos/runtime/src/coreclr/src/classlibnative/inc -I /home/tmds/repos/runtime/artifacts/obj/coreclr/Linux.x64.Release/src/inc -I /home/tmds/repos/runtime/src/coreclr/src/pal/inc/rt/cpp -I /home/tmds/repos/runtime/src/coreclr/src/nativeresources -I /home/tmds/repos/runtime/src/coreclr/src/jit/./jitstd -I /home/tmds/repos/runtime/src/coreclr/src/jit/../inc -D NDEBUG -O3 -Wall -Wno-null-conversion -Werror -Wno-unused-variable -Wno-unused-value -Wno-unused-function -Wno-invalid-offsetof -Wno-unused-private-field -Wno-microsoft -Wno-tautological-compare -Wno-constant-logical-operand -Wno-pragma-pack -Wno-unknown-warning-option -Wno-incompatible-ms-struct -Wno-profile-instr-out-of-date -Wno-profile-instr-unprofiled -std=gnu++11 -fdeprecated-macro -fvisibility hidden -fwrapv -stack-protector 2 -fms-extensions -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -vectorize-loops -vectorize-slp -faddrsig -o - /home/tmds/repos/runtime/src/coreclr/src/jit/codegencommon.cpp

Created attachment 1681228 [details]
preprocessed.cpp

Hi Serge, I've added the preprocessed output.

I made some small changes to the command based on errors clang gave. This is what I ran:

/usr/bin/clang-9 -E -D DEBUGGING_SUPPORTED -D DISABLE_CONTRACTS -D FEATURE_ARRAYSTUB_AS_IL -D FEATURE_BASICFREEZE -D FEATURE_CODE_VERSIONING -D FEATURE_COLLECTIBLE_TYPES -D FEATURE_CORECLR -D FEATURE_CORESYSTEM -D FEATURE_CORRUPTING_EXCEPTIONS -D FEATURE_DBGIPC_TRANSPORT_DI -D FEATURE_DBGIPC_TRANSPORT_VM -D FEATURE_DEFAULT_INTERFACES -D FEATURE_EH_FUNCLETS -D FEATURE_EVENTSOURCE_XPLAT -D FEATURE_EVENT_TRACE -D FEATURE_HIJACK -D FEATURE_HW_INTRINSICS -D FEATURE_ICASTABLE -D FEATURE_INSTANTIATINGSTUB_AS_IL -D FEATURE_ISYM_READER -D FEATURE_MANAGED_ETW -D FEATURE_MANAGED_ETW_CHANNELS -D FEATURE_MANUALLY_MANAGED_CARD_BUNDLES -D FEATURE_MULTICASTSTUB_AS_IL -D FEATURE_MULTICOREJIT -D FEATURE_MULTIREG_RETURN -D FEATURE_NO_HOST -D FEATURE_ON_STACK_REPLACEMENT -D FEATURE_PAL_ANSI -D FEATURE_PERFMAP -D FEATURE_PERFTRACING -D FEATURE_PORTABLE_SHUFFLE_THUNKS -D FEATURE_PROFAPI_ATTACH_DETACH -D FEATURE_READYTORUN -D FEATURE_READYTORUN_COMPILER -D FEATURE_REJIT -D FEATURE_REMOTE_PROC_MEM -D FEATURE_SIMD -D FEATURE_STANDALONE_GC -D FEATURE_STUBS_AS_IL -D FEATURE_SVR_GC -D FEATURE_SYMDIFF -D FEATURE_TIERED_COMPILATION -D FEATURE_USE_ASM_GC_WRITE_BARRIERS -D FEATURE_USE_SOFTWARE_WRITE_WATCH_FOR_GC_HEAP -D FEATURE_UTF8STRING -D FEATURE_WINMD_RESILIENT -D HOST_64BIT -D HOST_AMD64 -D HOST_UNIX -D JIT_BUILD -D NDEBUG -D PROFILING_SUPPORTED -D SELF_NO_HOST -D TARGET_64BIT -D TARGET_AMD64 -D TARGET_LINUX -D TARGET_UNIX -D UNICODE -D UNIX_AMD64_ABI -D UNIX_AMD64_ABI_ITF -D URTBLDENV_FRIENDLY=Retail -D _BLD_CLR -D _SECURE_SCL=0 -D _UNICODE -D clrjit_EXPORTS -I /home/tmds/repos/runtime/artifacts/obj/coreclr/Linux.x64.Release/src/jit/standalone -I /home/tmds/repos/runtime/src/coreclr/src/jit/standalone -I /home/tmds/repos/runtime/src/coreclr/src/pal/prebuilt/inc -I /home/tmds/repos/runtime/src/coreclr/../../artifacts/obj/coreclr -I /home/tmds/repos/runtime/src/coreclr/src/pal/inc -I /home/tmds/repos/runtime/src/coreclr/src/pal/inc/rt -I /home/tmds/repos/runtime/src/coreclr/src/pal/src/safecrt -I /home/tmds/repos/runtime/src/coreclr/src/inc -I /home/tmds/repos/runtime/src/coreclr/src/inc/winrt -I /home/tmds/repos/runtime/src/coreclr/src/debug/inc -I /home/tmds/repos/runtime/src/coreclr/src/debug/inc/amd64 -I /home/tmds/repos/runtime/src/coreclr/src/debug/inc/dump -I /home/tmds/repos/runtime/src/coreclr/src/md/inc -I /home/tmds/repos/runtime/src/coreclr/src/classlibnative/bcltype -I /home/tmds/repos/runtime/src/coreclr/src/classlibnative/cryptography -I /home/tmds/repos/runtime/src/coreclr/src/classlibnative/inc -I /home/tmds/repos/runtime/artifacts/obj/coreclr/Linux.x64.Release/src/inc -I /home/tmds/repos/runtime/src/coreclr/src/pal/inc/rt/cpp -I /home/tmds/repos/runtime/src/coreclr/src/nativeresources -I /home/tmds/repos/runtime/src/coreclr/src/jit/./jitstd -I /home/tmds/repos/runtime/src/coreclr/src/jit/../inc -D NDEBUG -O3 -Wall -Wno-null-conversion -Werror -Wno-unused-variable -Wno-unused-value -Wno-unused-function -Wno-invalid-offsetof -Wno-unused-private-field -Wno-microsoft -Wno-tautological-compare -Wno-constant-logical-operand -Wno-pragma-pack -Wno-unknown-warning-option -Wno-incompatible-ms-struct -Wno-profile-instr-out-of-date -Wno-profile-instr-unprofiled -std=gnu++11 -fwrapv -fstack-protector -fms-extensions -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -faddrsig -o - /home/tmds/repos/runtime/src/coreclr/src/jit/codegencommon.cpp >/tmp/preprocessed.cpp

Thanks Tom! I'd also need this file: /home/tmds/.nuget/packages/optimization.linux-x64.pgo.coreclr/99.99.99-master-20200228.3/data/clrjit.profdata

Created attachment 1684786 [details]
clrjit.profdata

Thanks. i've been able to reproduce using Fedora's rpm, but currently fails to reproduce using self-built versions. I'm investigating :-)

Tom, I've been digging (a lot) in that issue, and the profile info fail to load correctly whatever the clang version, from 9.0.1 to master version. I also see that the profile information are downloaded instead of being produced, so there's a risk of mismatch here. Does that ring any bell?

Serge, thank you for investigating this!

Given the path, I also think the pgo data is downloaded.
If you think the root cause is likely to be a version mismatch, we can create an issue for it in .NET Core repo.
The repo is at https://github.com/dotnet/runtime. You can create the issue, or I can do it if you like. My handle is @tmds.


I think the first question we may get is: what kind of compatibility there is between versions.

Thanks for the hint. I'm unsure of the wording, but I opened https://github.com/dotnet/runtime/issues/36344

https://reviews.llvm.org/D79961 should fix the issue. This turned to be an important bug, thanks *a lot* Tom for raising it.

Hi Serge, great that you found the root cause!

I had a look at the bug report, do I understand correctly that pgo data for .NET Core will need to be regenerated?

That's the easier and safer path, yes. Ideally use the same compiler version to generate and use the profdata. The patch landed upstream but won't be available until clang-11.

Small update: the patch is in the release/11.x branch of llvm, so the bug is going to be fixed once llvm 11 lands in rawhide.

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