[all-commits] [llvm/llvm-project] 81f7b9: [sanitizer] Print errno for report file open failure

[Teresa Johnson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 81f7b96ed0a2295e0b82ca185019370ac8e1895e
      https://github.com/llvm/llvm-project/commit/81f7b96ed0a2295e0b82ca185019370ac8e1895e
  Author: Teresa Johnson <tejohnson at google.com>
  Date:   2020-10-29 (Thu, 29 Oct 2020)

  Changed paths:
    M compiler-rt/lib/sanitizer_common/sanitizer_file.cpp
    M compiler-rt/test/memprof/TestCases/log_path_test.cpp

  Log Message:
  -----------
  [sanitizer] Print errno for report file open failure

To help debug failures, specifically the llvm-avr-linux bot failure from
5c20d7db9f2791367b9311130eb44afecb16829c:

http://lab.llvm.org:8011/#/builders/112/builds/407/steps/5/logs/FAIL__MemProfiler-x86_64-linux-dynamic__log_path_t

Also re-enable the failing test which I temporarily disabled, to
see if this change will help identify why that particular log file can't
be opened for write on that bot (when another log file in the same
directory could earlier in the test).

Differential Revision: https://reviews.llvm.org/D90120