def test_ensure_file_error(self):
with named_directory() as d, working_directory(d):
self.assertFalse(os.path.exists('test'))
goma_link.ensure_file('test')
self.assertTrue(os.path.exists('test'))
self.assertRaises(OSError, goma_link.ensure_file,
'test/impossible')
def test_fallback_lto(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'main.cpp', '-o',
'main.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'foo.cpp', '-o',
'foo.o'
])
rc = goma_ld.GomaLinkUnix().main([
'goma_ld.py', '--gomacc', 'gomacc', '--',
self.clangxx(), '-fuse-ld=lld', '-flto=thin', 'main.o',
'foo.o', '-o', 'main'
])
# Should succeed.
self.assertEqual(rc, 0)
# lto.main directory should not be present.
self.assertFalse(os.path.exists(os.path.join(d, 'lto.main')))
# Check that main does not call foo.
disasm = subprocess.check_output(['llvm-objdump', '-d', 'main'])
main_idx = disasm.index(b' <main>:\n')
after_main_idx = disasm.index(b'\n\n', main_idx)
main_disasm = disasm[main_idx:after_main_idx]
self.assertNotIn(b'foo', main_disasm)
def test_no_gomacc(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'main.cpp', '-o',
'main.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'foo.cpp', '-o',
'foo.o'
])
rc = GomaLinkUnixWhitelistMain().main([
'goma_ld.py', '--no-gomacc', '-j', '16', '--',
self.clangxx(), '-fuse-ld=lld', '-flto=thin', 'main.o',
'foo.o', '-o', 'main'
])
# Should succeed.
self.assertEqual(rc, 0)
# build.ninja file should not have gomacc invocations in it.
with open(os.path.join(d, 'lto.main', 'build.ninja')) as f:
buildrules = f.read()
self.assertNotIn('gomacc ', buildrules)
self.assertIn('build lto.main/main.o : codegen ', buildrules)
self.assertIn('build lto.main/foo.o : codegen ', buildrules)
# Check that main does not call foo.
disasm = subprocess.check_output(['llvm-objdump', '-d', 'main'])
main_idx = disasm.index(b' <main>:\n')
after_main_idx = disasm.index(b'\n\n', main_idx)
main_disasm = disasm[main_idx:after_main_idx]
self.assertNotIn(b'foo', main_disasm)
def test_debug_params(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
os.makedirs('obj')
subprocess.check_call([
self.clangxx(), '-c', '-g', '-gsplit-dwarf', '-flto=thin',
'main.cpp', '-o', 'obj/main.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-g', '-gsplit-dwarf', '-flto=thin',
'foo.cpp', '-o', 'obj/foo.o'
])
with open('main.rsp', 'w') as f:
f.write('obj/main.o\n' 'obj/foo.o\n')
rc = GomaLinkUnixWhitelistMain().main([
'goma_ld.py',
self.clangxx(), '-fuse-ld=lld', '-flto=thin', '-g',
'-gsplit-dwarf', '-Wl,--lto-O2', '-o', 'main', '@main.rsp'
])
# Should succeed.
self.assertEqual(rc, 0)
# Check debug info present, refers to .dwo file, and does not
# contain full debug info for foo.cpp.
dbginfo = subprocess.check_output(
['llvm-dwarfdump', '-debug-info',
'main']).decode('utf-8', 'backslashreplace')
self.assertRegexpMatches(dbginfo,
'\\bDW_AT_GNU_dwo_name\\b.*\\.dwo"')
self.assertNotRegexpMatches(dbginfo,
'\\bDW_AT_name\\b.*foo\\.cpp"')
def test_override_allowlist(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'main.cpp', '-o',
'main.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'foo.cpp', '-o',
'foo.o'
])
rc = goma_ld.GomaLinkUnix().main([
'goma_ld.py', '--generate', '--allowlist', '--',
self.clangxx(), '-fuse-ld=lld', '-flto=thin', 'main.o',
'foo.o', '-o', 'main'
])
# Should succeed.
self.assertEqual(rc, 0)
# build.ninja file should have rules for main and foo.
ninjafile = os.path.join(d, 'lto.main', 'build.ninja')
self.assertTrue(os.path.exists(ninjafile))
with open(ninjafile) as f:
buildrules = f.read()
self.assertIn('build lto.main/main.o.stamp : codegen ',
buildrules)
self.assertIn('build lto.main/foo.o.stamp : codegen ',
buildrules)
def test_distributed_lto_common_objs(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
os.makedirs('obj')
subprocess.check_call([
self.clangcl(), '-c', '-Os', '-flto=thin', 'main.cpp',
'-Foobj/main.obj'
])
subprocess.check_call([
self.clangcl(), '-c', '-Os', '-flto=thin', 'foo.cpp',
'-Foobj/foo.obj'
])
subprocess.check_call([
self.clangcl(), '-c', '-Os', '-flto=thin', 'bar.cpp',
'-Foobj/bar.obj'
])
subprocess.check_call([
'llvm-ar', 'crsT', 'obj/foobar.lib', 'obj/bar.obj',
'obj/foo.obj'
])
with open('main.rsp', 'w') as f:
f.write('obj/main.obj\n' 'obj/foobar.lib\n')
with open('my_goma.sh', 'w') as f:
f.write('#! /bin/sh\n\ngomacc "$@"\n')
os.chmod('my_goma.sh', 0o755)
rc = goma_link.GomaLinkWindows().main([
'goma_link.py', '--gomacc', './my_goma.sh', '--',
self.lld_link(), '-nodefaultlib', '-entry:main',
'-out:main.exe', '@main.rsp'
])
# Should succeed.
self.assertEqual(rc, 0)
# Check codegen parameters.
with open(os.path.join(d, 'lto.main.exe', 'build.ninja')) as f:
buildrules = f.read()
codegen_match = re.search('^rule codegen\\b.*?^[^ ]',
buildrules, re.MULTILINE | re.DOTALL)
self.assertIsNotNone(codegen_match)
codegen_text = codegen_match.group(0)
self.assertIn('my_goma.sh', codegen_text)
self.assertNotIn('-flto', codegen_text)
self.assertIn(
'build common_objs/obj/main.obj.stamp : codegen ',
buildrules)
self.assertIn('build common_objs/obj/foo.obj.stamp : codegen ',
buildrules)
self.assertIn(' index = common_objs/empty.thinlto.bc',
buildrules)
link_match = re.search(
'^build main.exe : native-link\\b.*?^[^ ]', buildrules,
re.MULTILINE | re.DOTALL)
self.assertIsNotNone(link_match)
link_text = link_match.group(0)
self.assertNotIn('main.exe.split.obj', link_text)
# Check that main does not call foo.
disasm = subprocess.check_output(
['llvm-objdump', '-d', 'main.exe'])
# There are no symbols in the disassembly, but we're expecting two
# functions, one of which calls the other.
self.assertTrue(b'call' in disasm or b'jmp' in disasm)
def test_distributed_lto_allowlist(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
os.makedirs('obj')
subprocess.check_call([
self.clangcl(), '-c', '-Os', '-flto=thin', '-m32', 'main.cpp',
'-Foobj/main.obj'
])
subprocess.check_call([
self.clangcl(), '-c', '-Os', '-flto=thin', '-m32', 'foo.cpp',
'-Foobj/foo.obj'
])
subprocess.check_call([
self.clangcl(), '-c', '-Os', '-flto=thin', '-m32', 'bar.cpp',
'-Foobj/bar.obj'
])
subprocess.check_call([
'llvm-ar', 'crsT', 'obj/foobar.lib', 'obj/bar.obj',
'obj/foo.obj'
])
with open('main.rsp', 'w') as f:
f.write('obj/main.obj\n' 'obj/foobar.lib\n')
rc = GomaLinkWindowsAllowMain().main([
'goma_link.py', '--gomacc', 'gomacc', '--',
self.lld_link(), '-nodefaultlib', '-entry:main',
'-machine:X86', '-opt:lldlto=2',
'-mllvm:-import-instr-limit=10', '-out:main.exe', '@main.rsp'
])
# Should succeed.
self.assertEqual(rc, 0)
# Check codegen parameters.
with open(os.path.join(d, 'lto.main.exe', 'build.ninja')) as f:
buildrules = f.read()
codegen_match = re.search('^rule codegen\\b.*?^[^ ]',
buildrules, re.MULTILINE | re.DOTALL)
self.assertIsNotNone(codegen_match)
codegen_text = codegen_match.group(0)
self.assertIn('gomacc', codegen_text)
self.assertIn('-m32', codegen_text)
self.assertIn('-mllvm -import-instr-limit=10', codegen_text)
self.assertNotIn('-flto', codegen_text)
self.assertIn(
'build lto.main.exe/obj/main.obj.stamp : codegen ',
buildrules)
self.assertIn(
'build lto.main.exe/obj/foo.obj.stamp : codegen ',
buildrules)
link_match = re.search(
'^build main.exe : native-link\\b.*?^[^ ]', buildrules,
re.MULTILINE | re.DOTALL)
self.assertIsNotNone(link_match)
link_text = link_match.group(0)
self.assertIn('main.exe.split.obj', link_text)
# Check that main does not call foo.
disasm = subprocess.check_output(
['llvm-objdump', '-d', 'main.exe'])
# There are no symbols in the disassembly, but we're expecting a single
# function, with no calls or jmps.
self.assertNotIn(b'jmp', disasm)
self.assertNotIn(b'call', disasm)
def test_ensure_file_existing(self):
with named_directory() as d, working_directory(d):
self.assertFalse(os.path.exists('foo/test'))
goma_link.ensure_file('foo/test')
self.assertTrue(os.path.exists('foo/test'))
os.utime('foo/test', (0, 0))
statresult = os.stat('foo/test')
goma_link.ensure_file('foo/test')
self.assertTrue(os.path.exists('foo/test'))
newstatresult = os.stat('foo/test')
self.assertEqual(newstatresult.st_mtime, statresult.st_mtime)
def test_generate_no_codegen(self):
with named_directory() as d, working_directory(d):
with open('main.o', 'wb') as f:
f.write(b'\7fELF')
with mock.patch('sys.stderr', new_callable=StringIO) as stderr:
rc = GomaLinkUnixAllowMain().main([
'goma_ld.py', '--generate', '--',
self.clangxx(), 'main.o', '-o', 'main'
])
self.assertEqual(rc, 5)
self.assertIn('no ninja file generated.\n', stderr.getvalue())
def test_generate(self):
with named_directory() as d, working_directory(d):
with open('main.o', 'wb') as f:
f.write(b'BC\xc0\xde')
with mock.patch('sys.stderr', new_callable=StringIO) as stderr:
rc = GomaLinkUnixAllowMain().main([
'goma_ld.py', '--generate', '--',
self.clangxx(), 'main.o', '-o', 'main'
])
self.assertEqual(rc, 0)
m = re.search('ninja file (.*)', stderr.getvalue())
self.assertIsNotNone(m)
path = shlex.split(m.group(1))[0]
self.assertTrue(os.path.exists(path))
content = open(path).read()
self.assertRegex(
content,
re.compile('^build [^:]+/main\\.o\\.stamp : codegen ',
re.MULTILINE))
def test_distributed_lto_thin_archive_subdir(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
os.makedirs('obj')
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'main.cpp', '-o',
'obj/main.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'foo.cpp', '-o',
'obj/foo.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', 'bar.cpp', '-o',
'obj/bar.o'
])
subprocess.check_call([
'llvm-ar', 'crsT', 'obj/libfoobar.a', 'obj/bar.o', 'obj/foo.o'
])
rc = GomaLinkUnixAllowMain().main([
'goma_ld.py',
self.clangxx(), '-fuse-ld=lld', '-flto=thin', 'obj/main.o',
'obj/libfoobar.a', '-o', 'main'
])
# Should succeed.
self.assertEqual(rc, 0)
# build.ninja file should have gomacc invocations in it.
with open(os.path.join(d, 'lto.main', 'build.ninja')) as f:
buildrules = f.read()
self.assertIn('gomacc ', buildrules)
self.assertIn('build lto.main/obj/main.o.stamp : codegen ',
buildrules)
self.assertIn('build lto.main/obj/foo.o.stamp : codegen ',
buildrules)
# Check that main does not call foo.
disasm = subprocess.check_output(['llvm-objdump', '-d', 'main'])
main_idx = disasm.index(b' <main>:\n')
after_main_idx = disasm.index(b'\n\n', main_idx)
main_disasm = disasm[main_idx:after_main_idx]
self.assertNotIn(b'foo', main_disasm)
def test_override_allowlist(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
os.makedirs('obj')
subprocess.check_call([
self.clangcl(), '-c', '-O2', '-flto=thin', 'main.cpp',
'-Foobj/main.obj'
])
subprocess.check_call([
self.clangcl(), '-c', '-O2', '-flto=thin', 'foo.cpp',
'-Foobj/foo.obj'
])
rc = goma_link.GomaLinkWindows().main([
'goma_link.py', '--generate', '--allowlist', '--',
self.lld_link(), '-nodefaultlib', '-entry:main',
'-opt:lldlto=2', '-out:main.exe', 'obj/main.obj', 'obj/foo.obj'
])
# Should succeed.
self.assertEqual(rc, 0)
# Check that we have rules for main and foo, and that they are
# not common objects.
with open(os.path.join(d, 'lto.main.exe', 'build.ninja')) as f:
buildrules = f.read()
codegen_match = re.search(r'^rule codegen\b.*?^[^ ]',
buildrules, re.MULTILINE | re.DOTALL)
self.assertIsNotNone(codegen_match)
codegen_text = codegen_match.group(0)
self.assertNotIn('-flto', codegen_text)
self.assertIn(
'build lto.main.exe/obj/main.obj.stamp : codegen ',
buildrules)
self.assertIn(
'build lto.main.exe/obj/foo.obj.stamp : codegen ',
buildrules)
link_match = re.search(
r'^build main.exe : native-link\b.*?^[^ ]', buildrules,
re.MULTILINE | re.DOTALL)
self.assertIsNotNone(link_match)
def test_ensure_file_no_dir(self):
with named_directory() as d, working_directory(d):
self.assertFalse(os.path.exists('test'))
goma_link.ensure_file('test')
self.assertTrue(os.path.exists('test'))
def test_distributed_lto_params(self):
with named_directory() as d, working_directory(d):
_create_inputs(d)
os.makedirs('obj')
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', '-m32',
'-fsplit-lto-unit', '-fwhole-program-vtables', 'main.cpp',
'-o', 'obj/main.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', '-m32',
'-fsplit-lto-unit', '-fwhole-program-vtables', 'foo.cpp', '-o',
'obj/foo.o'
])
subprocess.check_call([
self.clangxx(), '-c', '-Os', '-flto=thin', '-m32',
'-fsplit-lto-unit', '-fwhole-program-vtables', 'bar.cpp', '-o',
'obj/bar.o'
])
subprocess.check_call([
'llvm-ar', 'crsT', 'obj/libfoobar.a', 'obj/bar.o', 'obj/foo.o'
])
with open('main.rsp', 'w') as f:
f.write('-fsplit-lto-unit\n'
'-fwhole-program-vtables\n'
'obj/main.o\n'
'obj/libfoobar.a\n')
rc = GomaLinkUnixWhitelistMain().main([
'goma_ld.py',
self.clangxx(), '-fuse-ld=lld', '-flto=thin', '-m32',
'-Wl,-mllvm', '-Wl,-generate-type-units', '-Wl,--lto-O2', '-o',
'main', '-Wl,--start-group', '@main.rsp', '-Wl,--end-group'
])
# Should succeed.
self.assertEqual(rc, 0)
# Check codegen parameters.
with open(os.path.join(d, 'lto.main', 'build.ninja')) as f:
buildrules = f.read()
codegen_match = re.search('^rule codegen\\b.*?^[^ ]',
buildrules, re.MULTILINE | re.DOTALL)
self.assertIsNotNone(codegen_match)
codegen_text = codegen_match.group(0)
self.assertIn('gomacc', codegen_text)
self.assertIn('-m32', codegen_text)
self.assertIn('-mllvm -generate-type-units', codegen_text)
self.assertNotIn('-flto', codegen_text)
self.assertIn('build lto.main/obj/main.o : codegen ',
buildrules)
self.assertIn('build lto.main/obj/foo.o : codegen ',
buildrules)
link_match = re.search('^build main : native-link\\b.*?^[^ ]',
buildrules, re.MULTILINE | re.DOTALL)
self.assertIsNotNone(link_match)
link_text = link_match.group(0)
self.assertIn('main.split.o', link_text)
# Check that main does not call foo.
disasm = subprocess.check_output(['llvm-objdump', '-d', 'main'])
main_idx = disasm.index(b' <main>:\n')
after_main_idx = disasm.index(b'\n\n', main_idx)
main_disasm = disasm[main_idx:after_main_idx]
self.assertNotIn(b'foo', main_disasm)
