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Coverage support with LCOV and GCOV

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This patch adds a `coverage` target that allows coverage statisitics to be
retrieved for the project. It requires that lcov and gcov is installed and
that the generator is unix makefiles but this can be improved upon in
future releases.

To make it work use the coverage build type:

```
cmake -DCMAKE_BUILD_TYPE=Coverage .
make coverage
```
This commit is contained in:
Matt Clarkson 2015-04-30 14:28:04 +01:00
parent 3314aa43c2
commit 36c1eb6975
3 changed files with 67 additions and 0 deletions
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4
.gitignore vendored
View File

@ -10,6 +10,10 @@
*.pyc
__pycache__
# lcov
*.lcov
/lcov
# cmake files.
/Testing
CMakeCache.txt

21
CMakeLists.txt
View File

@ -64,6 +64,27 @@ if (BENCHMARK_ENABLE_LTO)
endif()
endif()
# Coverage build type
set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}" CACHE STRING
"Flags used by the C++ compiler during coverage builds."
FORCE)
set(CMAKE_EXE_LINKER_FLAGS_COVERAGE
"${CMAKE_EXE_LINKER_FLAGS_DEBUG}" CACHE STRING
"Flags used for linking binaries during coverage builds."
FORCE)
set(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
"${CMAKE_SHARED_LINKER_FLAGS_DEBUG}" CACHE STRING
"Flags used by the shared libraries linker during coverage builds."
FORCE)
mark_as_advanced(
CMAKE_CXX_FLAGS_COVERAGE
CMAKE_EXE_LINKER_FLAGS_COVERAGE
CMAKE_SHARED_LINKER_FLAGS_COVERAGE)
set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage."
FORCE)
add_cxx_compiler_flag(--coverage COVERAGE)
# C++ feature checks
cxx_feature_check(STD_REGEX)
cxx_feature_check(GNU_POSIX_REGEX)

42
test/CMakeLists.txt
View File

@ -43,3 +43,45 @@ compile_benchmark_test(cxx03_test)
set_target_properties(cxx03_test
PROPERTIES COMPILE_FLAGS "${CXX03_FLAGS}")
add_test(cxx03 cxx03_test --benchmark_min_time=0.01)
# Add the coverage command(s)
string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
find_program(GCOV gcov)
find_program(LCOV lcov)
find_program(GENHTML genhtml)
find_program(CTEST ctest)
if (GCOV AND LCOV AND GENHTML AND CTEST AND HAVE_CXX_FLAG_COVERAGE)
add_custom_command(
OUTPUT ${CMAKE_BINARY_DIR}/lcov/index.html
COMMAND ${LCOV} -q -z -d .
COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o before.lcov -i
COMMAND ${CTEST} --force-new-ctest-process
COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o after.lcov
COMMAND ${LCOV} -q -a before.lcov -a after.lcov --output-file final.lcov
COMMAND ${LCOV} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/test/*'" -o final.lcov
COMMAND ${GENHTML} final.lcov -o lcov --demangle-cpp --sort -p "${CMAKE_BINARY_DIR}" -t benchmark
DEPENDS filter_test benchmark_test options_test basic_test fixture_test cxx03_test
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
COMMENT "Running LCOV"
)
add_custom_target(coverage
DEPENDS ${CMAKE_BINARY_DIR}/lcov/index.html
COMMENT "LCOV report at lcov/index.html"
)
message(STATUS "Coverage command added")
else()
if (HAVE_CXX_FLAG_COVERAGE)
set(CXX_FLAG_COVERAGE_MESSAGE supported)
else()
set(CXX_FLAG_COVERAGE_MESSAGE unavailable)
endif()
message(WARNING
"Coverage not available:\n"
" gcov: ${GCOV}\n"
" lcov: ${LCOV}\n"
" genhtml: ${GENHTML}\n"
" ctest: ${CTEST}\n"
" --coverage flag: ${CXX_FLAG_COVERAGE_MESSAGE}")
endif()
endif()