[libcxx] Add code coverage configuration to CMake and LIT.
Summary:
This patch adds configuration to CMake and LIT for running the libc++ test-suite to generate code coverage.
To use code coverage use following instructions.
* Find the clang resource dir using `$CXX -print-search-dirs`. Let <library-dir> be the first library search directory.
* `cmake <regular-options> -DLIBCXX_GENERATE_COVERAGE=ON -DLIBCXX_COVERAGE_LIBRARY=<library-dir>/lib/<platform>/libclang_rt.profile.a <source>`
* `make cxx`
* `make check-libcxx`
* `make generate-libcxx-coverage`
The reason I want this patch upstreamed is so I can setup a bot that generates code coverage and posts in online for every revision.
Reviewers: mclow.lists, jroelofs, danalbert
Reviewed By: danalbert
Differential Revision: http://reviews.llvm.org/D8716
llvm-svn: 233669
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 78fdf2d0f5274923fff06de4402d83bb9609d2b3
diff --git a/cmake/Modules/CodeCoverage.cmake b/cmake/Modules/CodeCoverage.cmake
new file mode 100644
index 0000000..addd10a
--- /dev/null
+++ b/cmake/Modules/CodeCoverage.cmake
@@ -0,0 +1,36 @@
+find_program(CODE_COVERAGE_LCOV lcov)
+if (NOT CODE_COVERAGE_LCOV)
+ message(FATAL_ERROR "Cannot find lcov...")
+endif()
+
+find_program(CODE_COVERAGE_GENHTML genhtml)
+if (NOT CODE_COVERAGE_GENHTML)
+ message(FATAL_ERROR "Cannot find genhtml...")
+endif()
+
+set(CMAKE_CXX_FLAGS_COVERAGE "-g -O0 --coverage")
+
+function(setup_lcov_test_target_coverage target_name output_dir capture_dirs source_dirs)
+ file(MAKE_DIRECTORY ${output_dir})
+
+ set(CAPTURE_DIRS "")
+ foreach(cdir ${capture_dirs})
+ list(APPEND CAPTURE_DIRS "-d;${cdir}")
+ endforeach()
+
+ set(EXTRACT_DIRS "")
+ foreach(sdir ${source_dirs})
+ list(APPEND EXTRACT_DIRS "'${sdir}/*'")
+ endforeach()
+
+ message(STATUS "Capture Directories: ${CAPTURE_DIRS}")
+ message(STATUS "Extract Directories: ${EXTRACT_DIRS}")
+
+ add_custom_target(generate-lib${target_name}-coverage
+ COMMAND ${CODE_COVERAGE_LCOV} --capture ${CAPTURE_DIRS} -o test_coverage.info
+ COMMAND ${CODE_COVERAGE_LCOV} --extract test_coverage.info ${EXTRACT_DIRS} -o test_coverage.info
+ COMMAND ${CODE_COVERAGE_GENHTML} --demangle-cpp test_coverage.info -o test_coverage
+ COMMAND ${CMAKE_COMMAND} -E remove test_coverage.info
+ WORKING_DIRECTORY ${output_dir}
+ COMMENT "Generating coverage results")
+endfunction()