This revision was automatically updated to reflect the committed changes.
Closed by commit rG01f13f487775: Explain code coverage with Lit in
docs/SourceBasedCodeCoverage.rst (authored by FlashSheridan, committed by
gkistanova).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D140730/new/
https://reviews.llvm.org/D140730
Files:
clang/docs/SourceBasedCodeCoverage.rst
Index: clang/docs/SourceBasedCodeCoverage.rst
===================================================================
--- clang/docs/SourceBasedCodeCoverage.rst
+++ clang/docs/SourceBasedCodeCoverage.rst
@@ -127,6 +127,11 @@
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 @@
# 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:
Index: clang/docs/SourceBasedCodeCoverage.rst
===================================================================
--- clang/docs/SourceBasedCodeCoverage.rst
+++ clang/docs/SourceBasedCodeCoverage.rst
@@ -127,6 +127,11 @@
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 @@
# 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:
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