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import lit.formats
import os
import subprocess
import sys
config.name = 'cfi'
config.suffixes = ['.cpp']
config.test_source_root = os.path.dirname(__file__)
def is_darwin_lto_supported():
return os.path.exists(os.path.join(config.llvm_shlib_dir, 'libLTO.dylib'))
def is_linux_lto_supported():
if not os.path.exists(os.path.join(config.llvm_shlib_dir, 'LLVMgold.so')):
return False
ld_cmd = subprocess.Popen([config.gold_executable, '--help'], stdout = subprocess.PIPE)
ld_out = ld_cmd.stdout.read().decode()
ld_cmd.wait()
if not '-plugin' in ld_out:
return False
return True
clangxx = ' '.join([config.clang] + config.cxx_mode_flags)
config.substitutions.append((r"%clangxx ", clangxx + ' '))
if sys.platform == 'darwin' and is_darwin_lto_supported():
config.substitutions.append((r"%clangxx_cfi ", 'env DYLD_LIBRARY_PATH=' + config.llvm_shlib_dir + ' ' + clangxx + ' -fsanitize=cfi '))
elif sys.platform.startswith('linux') and is_linux_lto_supported():
config.substitutions.append((r"%clangxx_cfi ", clangxx + ' -fuse-ld=gold -fsanitize=cfi '))
else:
config.unsupported = True
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