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Diffstat (limited to 'clang/docs/SourceBasedCodeCoverage.rst')
| -rw-r--r-- | clang/docs/SourceBasedCodeCoverage.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/clang/docs/SourceBasedCodeCoverage.rst b/clang/docs/SourceBasedCodeCoverage.rst index 5f4bcf8e0ff0..f92e8d8fc4d6 100644 --- a/clang/docs/SourceBasedCodeCoverage.rst +++ b/clang/docs/SourceBasedCodeCoverage.rst @@ -127,6 +127,11 @@ copy that's mapped into memory). This implementation can be also enabled for other platforms by passing the ``-runtime-counter-relocation`` option to the backend during compilation. +For a program such as the :doc:`Lit <CommandGuide/lit>` testing tool which +invokes other programs, it may be necessary to set ``LLVM_PROFILE_FILE`` for +each invocation. The pattern strings "%p" or "%Nm" may help to avoid +corruption due to concurrency. + .. code-block:: console % clang++ -fprofile-instr-generate -fcoverage-mapping -mllvm -runtime-counter-relocation foo.cc -o foo @@ -143,6 +148,9 @@ coverage reports. This is done using the "merge" tool in ``llvm-profdata`` # Step 3(a): Index the raw profile. % llvm-profdata merge -sparse foo.profraw -o foo.profdata +For an example of merging multiple profiles created by testing, +see the LLVM `coverage build script <https://github.com/llvm/llvm-zorg/blob/main/zorg/jenkins/jobs/jobs/llvm-coverage>`_. + There are multiple different ways to render coverage reports. The simplest option is to generate a line-oriented report: |