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llvm-project/libcxx/cmake/Modules/CodeCoverage.cmake

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[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 `$CXX -print-search-dirs`. Let <library-dir> be the first library search directory. * `cmake <regular-options> -DLIBCXX_GENERATE_COVERAGE=ON -DLIBCXX_COVERAGE_LIBRARY=<library-dir>/lib/<platform>/libclang_rt.profile.a <source>` * `make cxx` * `make check-libcxx` * `make generate-libcxx-coverage` The reason I want this patch upstreamed is so I can setup a bot that generates code coverage and posts in online for every revision. Reviewers: mclow.lists, jroelofs, danalbert Reviewed By: danalbert Differential Revision: http://reviews.llvm.org/D8716 llvm-svn: 233669
2015-03-31 12:15:45 +08:00
find_program(CODE_COVERAGE_LCOV lcov)
if (NOT CODE_COVERAGE_LCOV)
message(FATAL_ERROR "Cannot find lcov...")
endif()
Change test coverage generation to use llvm-cov instead of gcov. Clang doesn't produce gcov compatible coverage files. This causes lcov to break because it uses gcov by default. This patch switches lcov to use llvm-cov as the gcov-tool. Unfortunatly llvm-cov doesn't provide a gcov like interface by default so it won't work with lcov. However `llvm-cov gcov` does. For this reason we generate 'llvm-cov-wrapper' script that always passes the gcov flag. llvm-svn: 297553
2017-03-11 11:24:18 +08:00
find_program(CODE_COVERAGE_LLVM_COV llvm-cov)
if (NOT CODE_COVERAGE_LLVM_COV)
message(FATAL_ERROR "Cannot find llvm-cov...")
endif()
[libcxx] Add code coverage configuration to CMake and LIT. Summary: This patch adds configuration to CMake and LIT for running the libc++ test-suite to generate code coverage. To use code coverage use following instructions. * Find the clang resource dir using `$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
2015-03-31 12:15:45 +08:00
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)
Change test coverage generation to use llvm-cov instead of gcov. Clang doesn't produce gcov compatible coverage files. This causes lcov to break because it uses gcov by default. This patch switches lcov to use llvm-cov as the gcov-tool. Unfortunatly llvm-cov doesn't provide a gcov like interface by default so it won't work with lcov. However `llvm-cov gcov` does. For this reason we generate 'llvm-cov-wrapper' script that always passes the gcov flag. llvm-svn: 297553
2017-03-11 11:24:18 +08:00
if (NOT DEFINED LIBCXX_BINARY_DIR)
message(FATAL_ERROR "Variable must be set")
endif()
set(GCOV_TOOL "${LIBCXX_BINARY_DIR}/llvm-cov-wrapper")
file(GENERATE OUTPUT ${GCOV_TOOL}
CONTENT "#!/usr/bin/env bash\n${CODE_COVERAGE_LLVM_COV} gcov \"$@\"\n")
[libcxx] Add code coverage configuration to CMake and LIT. Summary: This patch adds configuration to CMake and LIT for running the libc++ test-suite to generate code coverage. To use code coverage use following instructions. * Find the clang resource dir using `$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
2015-03-31 12:15:45 +08:00
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
Change test coverage generation to use llvm-cov instead of gcov. Clang doesn't produce gcov compatible coverage files. This causes lcov to break because it uses gcov by default. This patch switches lcov to use llvm-cov as the gcov-tool. Unfortunatly llvm-cov doesn't provide a gcov like interface by default so it won't work with lcov. However `llvm-cov gcov` does. For this reason we generate 'llvm-cov-wrapper' script that always passes the gcov flag. llvm-svn: 297553
2017-03-11 11:24:18 +08:00
COMMAND chmod +x ${GCOV_TOOL}
COMMAND ${CODE_COVERAGE_LCOV} --gcov-tool ${GCOV_TOOL} --capture ${CAPTURE_DIRS} -o test_coverage.info
COMMAND ${CODE_COVERAGE_LCOV} --gcov-tool ${GCOV_TOOL} --extract test_coverage.info ${EXTRACT_DIRS} -o test_coverage.info
[libcxx] Add code coverage configuration to CMake and LIT. Summary: This patch adds configuration to CMake and LIT for running the libc++ test-suite to generate code coverage. To use code coverage use following instructions. * Find the clang resource dir using `$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
2015-03-31 12:15:45 +08:00
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()