[all-commits] [llvm/llvm-project] 046fd1: UBSan: Use ubsan_interface.h for synthetic debug i...

[Vitaly Buka via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 046fd10b5e2592f10b4b0f90279d53ad24e71af6
      https://github.com/llvm/llvm-project/commit/046fd10b5e2592f10b4b0f90279d53ad24e71af6
  Author: Vitaly Buka <vitalybuka at google.com>
  Date:   2026-04-16 (Thu, 16 Apr 2026)

  Changed paths:
    M clang/lib/CodeGen/CGDebugInfo.cpp
    M clang/lib/CodeGen/CGDebugInfo.h
    M clang/test/DebugInfo/Generic/bounds-checking-debuginfo.c
    M clang/test/DebugInfo/Generic/cfi-check-fail-debuginfo.c
    M clang/test/DebugInfo/Generic/cfi-icall-generalize-debuginfo.c
    M clang/test/DebugInfo/Generic/cfi-icall-normalize2-debuginfo.c
    M clang/test/DebugInfo/Generic/ubsan-function-debuginfo.c
    M clang/test/DebugInfo/Generic/unsigned-promotion-debuginfo.c

  Log Message:
  -----------
  UBSan: Use ubsan_interface.h for synthetic debug info (#171929)

Before the patch, even with the same synthetic function name, they
counted as different functions, because the file name was different.

This makes it easier to analyze data in performance profiles.

`pprof -lines -top <somefile> | grep __ubsan_check_pointer_overflow`

Before:
```
60368049443  6.26%  6.26% 60383492016  6.26%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/TSVC/tsc.inc (inline)
43746146224  4.53% 10.79% 43763767409  4.54%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/SciMark2-C/SparseCompRow.c (inline)
11670846196  1.21% 26.03% 11673592781  1.21%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/ASC_Sequoia/AMGmk/csr_matvec.c (inline)
7948730683  0.82% 29.07% 7949496154  0.82%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/ASC_Sequoia/IRSmk/rmatmult3.c (inline)
7442972883  0.77% 30.62% 7447647795  0.77%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/mafft/Galign11.c (inline)
7181873035  0.74% 32.88% 7182846509  0.74%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/ASC_Sequoia/AMGmk/relax.c (inline)
7086681860  0.73% 33.61% 7086681860  0.73%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/SciMark2-C/FFT.c (inline)
6634628163  0.69% 35.03% 6644529197  0.69%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/Olden/em3d/make_graph.c (inline)
5778832834   0.6% 37.55% 5778832835   0.6%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/SciMark2-C/LU.c (inline)
5707159214  0.59% 38.14% 5707159214  0.59%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/SciMark2-C/Random.c (inline)
5265117200  0.55% 40.99% 5266753453  0.55%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/Trimaran/netbench-url/search.c (inline)
```

After:
```
143372006423 14.76% 14.76% 143426398982 14.76%  __ubsan_check_pointer_overflow sanitizer/ubsan_interface.h (inline)
16972753760  1.75% 31.03% 16979483803  1.75%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/TSVC/tsc.inc (inline)
14296973786  1.47% 32.50% 14297951231  1.47%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/SciMark2-C/SparseCompRow.c (inline)
7857020738  0.81% 36.93% 7857966628  0.81%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/ASC_Sequoia/AMGmk/csr_matvec.c (inline)
6956467376  0.72% 41.47% 6958074907  0.72%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/Olden/em3d/make_graph.c (inline)
5502783427  0.57% 45.07% 5502783429  0.57%  __ubsan_check_pointer_overflow test-suite/MultiSource/Benchmarks/SciMark2-C/LU.c (inline)
```



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