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Add support for collating profiles for use with code coverage

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Differential Revision: http://reviews.llvm.org/D20993

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272599 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vedant Kumar 2016-06-13 23:33:48 +00:00
parent ba53b88904
commit d1714dc208
3 changed files with 79 additions and 1 deletions
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15
CMakeLists.txt
View File

@ -430,6 +430,21 @@ else()
set(LLVM_ADD_NATIVE_VISUALIZERS_TO_SOLUTION FALSE CACHE INTERNAL "For Visual Studio 2013, manually copy natvis files to Documents\\Visual Studio 2013\\Visualizers" FORCE)
endif()
if (LLVM_BUILD_INSTRUMENTED OR LLVM_BUILD_INSTRUMENTED_COVERAGE)
if(NOT LLVM_PROFILE_MERGE_POOL_SIZE)
# A pool size of 1-2 is probably sufficient on a SSD. 3-4 should be fine
# for spining disks. Anything higher may only help on slower mediums.
set(LLVM_PROFILE_MERGE_POOL_SIZE "4")
endif()
if(NOT LLVM_PROFILE_FILE_PATTERN)
if(NOT LLVM_PROFILE_DATA_DIR)
set(LLVM_PROFILE_FILE_PATTERN "%${LLVM_PROFILE_MERGE_POOL_SIZE}m.profraw")
else()
file(TO_NATIVE_PATH "${LLVM_PROFILE_DATA_DIR}/%${LLVM_PROFILE_MERGE_POOL_SIZE}m.profraw" LLVM_PROFILE_FILE_PATTERN)
endif()
endif()
endif()
# All options referred to from HandleLLVMOptions have to be specified
# BEFORE this include, otherwise options will not be correctly set on
# first cmake run

10
cmake/modules/HandleLLVMOptions.cmake
View File

@ -598,7 +598,15 @@ endif()
option(LLVM_BUILD_INSTRUMENTED "Build LLVM and tools with PGO instrumentation (experimental)" Off)
mark_as_advanced(LLVM_BUILD_INSTRUMENTED)
append_if(LLVM_BUILD_INSTRUMENTED "-fprofile-instr-generate"
append_if(LLVM_BUILD_INSTRUMENTED "-fprofile-instr-generate='${LLVM_PROFILE_FILE_PATTERN}'"
CMAKE_CXX_FLAGS
CMAKE_C_FLAGS
CMAKE_EXE_LINKER_FLAGS
CMAKE_SHARED_LINKER_FLAGS)
option(LLVM_BUILD_INSTRUMENTED_COVERAGE "Build LLVM and tools with Code Coverage instrumentation (experimental)" Off)
mark_as_advanced(LLVM_BUILD_INSTRUMENTED_COVERAGE)
append_if(LLVM_BUILD_INSTRUMENTED_COVERAGE "-fprofile-instr-generate='${LLVM_PROFILE_FILE_PATTERN}' -fcoverage-mapping"
CMAKE_CXX_FLAGS
CMAKE_C_FLAGS
CMAKE_EXE_LINKER_FLAGS

55
utils/prepare-code-coverage-artifact.py Normal file
View File

@ -0,0 +1,55 @@
#!/usr/bin/env python
'''Prepare a code coverage artifact.
- Collate raw profiles into one indexed profile.
- Delete the raw profiles.
- Copy the coverage mappings in the binaries directory.
'''
import argparse
import glob
import os
import subprocess
import sys
def merge_raw_profiles(host_llvm_profdata, profile_data_dir):
print ':: Merging raw profiles...',
sys.stdout.flush()
raw_profiles = glob.glob(os.path.join(profile_data_dir, '*.profraw'))
manifest_path = os.path.join(profile_data_dir, 'profiles.manifest')
profdata_path = os.path.join(profile_data_dir, 'Coverage.profdata')
with open(manifest_path, 'w') as manifest:
manifest.write('\n'.join(raw_profiles))
subprocess.check_call([host_llvm_profdata, 'merge', '-sparse', '-f',
manifest_path, '-o', profdata_path])
for raw_profile in raw_profiles:
os.remove(raw_profile)
print 'Done!'
def extract_covmappings(host_llvm_cov, profile_data_dir, llvm_bin_dir):
print ':: Extracting covmappings...',
sys.stdout.flush()
for prog in os.listdir(llvm_bin_dir):
if prog == 'llvm-lit':
continue
covmapping_path = os.path.join(profile_data_dir,
os.path.basename(prog) + '.covmapping')
subprocess.check_call([host_llvm_cov, 'convert-for-testing',
os.path.join(llvm_bin_dir, prog), '-o',
covmapping_path])
print 'Done!'
if __name__ == '__main__':
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('host_llvm_profdata', help='Path to llvm-profdata')
parser.add_argument('host_llvm_cov', help='Path to llvm-cov')
parser.add_argument('profile_data_dir',
help='Path to the directory containing the raw profiles')
parser.add_argument('llvm_bin_dir',
help='Path to the directory containing llvm binaries')
args = parser.parse_args()
merge_raw_profiles(args.host_llvm_profdata, args.profile_data_dir)
extract_covmappings(args.host_llvm_cov, args.profile_data_dir,
args.llvm_bin_dir)