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#
# 2012-01-31, Lars Bilke
# - Enable Code Coverage
#
# 2013-09-17, Joakim Söderberg
# - Added support for Clang.
# - Some additional usage instructions.
#
# USAGE:
# 1. Copy this file into your cmake modules path.
#
# 2. Add the following line to your CMakeLists.txt:
# INCLUDE(CodeCoverage)
#
# 3. Set compiler flags to turn off optimization and enable coverage:
# SET(CMAKE_CXX_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
# SET(CMAKE_C_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
#
# 3. Use the function SETUP_TARGET_FOR_COVERAGE to create a custom make target
# which runs your test executable and produces a lcov code coverage report:
# Example:
# SETUP_TARGET_FOR_COVERAGE(
# my_coverage_target # Name for custom target.
# test_driver # Name of the test driver executable that runs the tests.
# # NOTE! This should always have a ZERO as exit code
# # otherwise the coverage generation will not complete.
# coverage # Name of output directory.
# )
#
# 4. Build a Debug build:
# cmake -DCMAKE_BUILD_TYPE=Debug ..
# make
# make my_coverage_target
#
#
# Check prereqs
FIND_PROGRAM( GCOV_PATH NAMES gcov-8 gcov )
FIND_PROGRAM( LCOV_PATH lcov )
FIND_PROGRAM( GREP_PATH grep )
FIND_PROGRAM( GENHTML_PATH genhtml )
FIND_PROGRAM( GCOVR_PATH gcovr PATHS ${CMAKE_SOURCE_DIR}/tests)
IF(NOT GCOV_PATH)
MESSAGE(FATAL_ERROR "gcov not found! Aborting...")
ENDIF() # NOT GCOV_PATH
IF(NOT CMAKE_COMPILER_IS_GNUCXX)
# Clang version 3.0.0 and greater now supports gcov as well.
MESSAGE(WARNING "Compiler is not GNU gcc! Clang Version 3.0.0 and greater supports gcov as well, but older versions don't.")
IF(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
MESSAGE(FATAL_ERROR "Compiler is not GNU gcc! Aborting...")
ENDIF()
ENDIF() # NOT CMAKE_COMPILER_IS_GNUCXX
SET(CMAKE_CXX_FLAGS_COVERAGE
"-g -O0 --coverage -fprofile-arcs -ftest-coverage"
CACHE STRING "Flags used by the C++ compiler during coverage builds."
FORCE )
SET(CMAKE_C_FLAGS_COVERAGE
"-g -O0 --coverage -fprofile-arcs -ftest-coverage"
CACHE STRING "Flags used by the C compiler during coverage builds."
FORCE )
SET(CMAKE_EXE_LINKER_FLAGS_COVERAGE
""
CACHE STRING "Flags used for linking binaries during coverage builds."
FORCE )
SET(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
""
CACHE STRING "Flags used by the shared libraries linker during coverage builds."
FORCE )
MARK_AS_ADVANCED(
CMAKE_CXX_FLAGS_COVERAGE
CMAKE_C_FLAGS_COVERAGE
CMAKE_EXE_LINKER_FLAGS_COVERAGE
CMAKE_SHARED_LINKER_FLAGS_COVERAGE )
IF ( NOT (CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "Coverage"))
MESSAGE( WARNING "Code coverage results with an optimized (non-Debug) build may be misleading" )
ENDIF() # NOT CMAKE_BUILD_TYPE STREQUAL "Debug"
# Param _targetname The name of new the custom make target
# Param _testrunner The name of the target which runs the tests.
# MUST return ZERO always, even on errors.
# If not, no coverage report will be created!
# Param _outputname lcov output is generated as _outputname.info
# HTML report is generated in _outputname/index.html
# Optional fourth parameter is passed as arguments to _testrunner
# Pass them in list form, e.g.: "-j;2" for -j 2
FUNCTION(SETUP_TARGET_FOR_COVERAGE _targetname _testrunner _outputname)
IF(NOT LCOV_PATH)
MESSAGE(FATAL_ERROR "lcov not found! Aborting...")
ENDIF() # NOT LCOV_PATH
IF(NOT GENHTML_PATH)
MESSAGE(FATAL_ERROR "genhtml not found! Aborting...")
ENDIF() # NOT GENHTML_PATH
IF(NOT GREP_PATH)
MESSAGE(FATAL_ERROR "grep not found! Run code coverage on linux or mac.")
ENDIF()
# Setup target
ADD_CUSTOM_TARGET(${_targetname}
COMMAND ${CMAKE_COMMAND} -E remove ${_outputname}.info.cleaned
${_outputname}.info
# Capturing lcov counters and generating report
COMMAND ${LCOV_PATH} -q --no-checksum --directory ${PROJECT_BINARY_DIR}
--gcov-tool ${GCOV_PATH} --capture --output-file ${_outputname}.info 2>/dev/null
COMMAND ${LCOV_PATH} -q --remove ${_outputname}.info
--gcov-tool ${GCOV_PATH} '*/test/*' '/usr/*' '*_TEST*' --output-file ${_outputname}.info.cleaned
COMMAND ${GENHTML_PATH} -q --legend -o ${_outputname}
${_outputname}.info.cleaned
COMMAND ${LCOV_PATH} --summary ${_outputname}.info.cleaned 2>&1 | grep "lines" | cut -d ' ' -f 4 | cut -d '%' -f 1 > coverage/lines.txt
COMMAND ${LCOV_PATH} --summary ${_outputname}.info.cleaned 2>&1 | grep "functions" | cut -d ' ' -f 4 | cut -d '%' -f 1 > coverage/functions.txt
COMMAND ${CMAKE_COMMAND} -E rename ${_outputname}.info.cleaned
${_outputname}.info
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
COMMENT "Resetting code coverage counters to zero.\n"
"Processing code coverage counters and generating report."
)
# Show info where to find the report
ADD_CUSTOM_COMMAND(TARGET ${_targetname} POST_BUILD
COMMAND COMMAND ${LCOV_PATH} -q --zerocounters --directory ${PROJECT_BINARY_DIR};
COMMENT "Open ./${_outputname}/index.html in your browser to view the coverage report."
)
ENDFUNCTION() # SETUP_TARGET_FOR_COVERAGE
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