[all-commits] [llvm/llvm-project] a07f90: [lit] Avoid profraw filename collisions with --per...

[Bryson Miller via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a07f90ba94938e61f81612bb00b568cb4503f3d4
      https://github.com/llvm/llvm-project/commit/a07f90ba94938e61f81612bb00b568cb4503f3d4
  Author: Bryson Miller <bryson at efficient.computer>
  Date:   2026-06-16 (Tue, 16 Jun 2026)

  Changed paths:
    M llvm/utils/lit/lit/TestRunner.py
    A llvm/utils/lit/tests/Inputs/per-test-coverage-by-lit-cfg/name-collision/a/test.py
    A llvm/utils/lit/tests/Inputs/per-test-coverage-by-lit-cfg/name-collision/b/test.py
    M llvm/utils/lit/tests/Inputs/per-test-coverage-by-lit-cfg/per-test-coverage-by-lit-cfg.py
    M llvm/utils/lit/tests/Inputs/per-test-coverage/per-test-coverage.py
    M llvm/utils/lit/tests/per-test-coverage-by-lit-cfg.py
    M llvm/utils/lit/tests/per-test-coverage.py

  Log Message:
  -----------
  [lit] Avoid profraw filename collisions with --per-test-coverage (#203998)

Per-test-coverage derived the `LLVM_PROFILE_FILE` name from the test's
basename with its extension removed, so siblings that share a basename
but differ by directory or extension (e.g. foo.c and foo.cpp in one
directory) wrote into the same profraw file and raced on it.

This PR builds the name from the full path in the suite and adds the
`%p` and `%m` placeholders so a test that runs several instrumented
binaries gets a distinct file per process and per binary, even across
exec chains or recycled process ids.



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