[all-commits] [llvm/llvm-project] 5301f4: [Sanitizer] Use % patterns in report paths (#141820)

[Ellis Hoag via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5301f4c469de1cd410dbc2fc953ead14296d4eb0
      https://github.com/llvm/llvm-project/commit/5301f4c469de1cd410dbc2fc953ead14296d4eb0
  Author: Ellis Hoag <ellis.sparky.hoag at gmail.com>
  Date:   2025-05-30 (Fri, 30 May 2025)

  Changed paths:
    M compiler-rt/lib/sanitizer_common/sanitizer_file.cpp
    A compiler-rt/test/sanitizer_common/TestCases/Posix/sanitizer_set_report_path_fail.cpp
    M compiler-rt/test/sanitizer_common/TestCases/Posix/sanitizer_set_report_path_test.cpp

  Log Message:
  -----------
  [Sanitizer] Use % patterns in report paths (#141820)

Support `%` patterns in sanitizer report paths, similar to the patterns
supported in IRPGO

https://github.com/llvm/llvm-project/blob/4bf67cdf026478c4bc3e708153c02f82e2c22524/compiler-rt/lib/profile/InstrProfilingFile.c#L999-L1017

* `%%` becomes `%`
* `%H` expands to the environment variable `HOME`
* `%t` expands to the environment variable `TMPDIR`
* `%p` expands to the process ID (PID)

In particular, the `%H` pattern is useful to resolve the home directory
at runtime, which is not possible before this PR.

Also, avoid using `Report()` before the report path has been set.



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