[PATCH] D157913: [Coverage] Allow Clang coverage to be used with debug info correlation.

[Zequan Wu via Phabricator via cfe-commits]

zequanwu marked an inline comment as done.
zequanwu added a comment.

For some unknown reasons, linker still generates __llvm_prf_names section in 
the final binary on mac even if the object file doesn't have this section. And 
I cannot use llvm-objdump to get anything from that section.

  $ llvm-readelf -S ../tmp/a.out
  ...
    Section {
      Index: 15
      Name: __llvm_prf_names (5F 5F 6C 6C 76 6D 5F 70 72 66 5F 6E 61 6D 65 73)
      Segment: __DATA (5F 5F 44 41 54 41 00 00 00 00 00 00 00 00 00 00)
      Address: 0x100018000
      Size: 0x0
      Offset: 98304
      Alignment: 0
      RelocationOffset: 0x0
      RelocationCount: 0
      Type: Regular (0x0)
      Attributes [ (0x0)
      ]
      Reserved1: 0x0
      Reserved2: 0x0
      Reserved3: 0x0
    }
  ...
  $ llvm-objdump --section=__llvm_prf_names --full-contents ../tmp/a.out
  ../tmp/a.out: file format mach-o arm64

I will delete the test for now as it's not working on mac: 
`compiler-rt/test/profile/Darwin/coverage-debug-info-correlate.cpp`


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D157913/new/

https://reviews.llvm.org/D157913

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