import os
import platform
import re
import subprocess
import sys
import lit.formats
import lit.util
from lit.llvm import llvm_config
from lit.llvm.subst import ToolSubst
# Configuration file for the 'lit' test runner.
# name: The name of this test suite.
config.name = "cross-project-tests"
# testFormat: The test format to use to interpret tests.
config.test_format = lit.formats.ShTest(not llvm_config.use_lit_shell)
# suffixes: A list of file extensions to treat as test files.
config.suffixes = [".c", ".cl", ".cpp", ".m"]
# excludes: A list of directories to exclude from the testsuite. The 'Inputs'
# subdirectories contain auxiliary inputs for various tests in their parent
# directories.
config.excludes = ["Inputs"]
# test_source_root: The root path where tests are located.
config.test_source_root = config.cross_project_tests_src_root
# test_exec_root: The root path where tests should be run.
config.test_exec_root = config.cross_project_tests_obj_root
llvm_config.use_default_substitutions()
tools = [
ToolSubst(
"%test_debuginfo",
command=os.path.join(
config.cross_project_tests_src_root,
"debuginfo-tests",
"llgdb-tests",
"test_debuginfo.pl",
),
),
ToolSubst("%llvm_src_root", config.llvm_src_root),
ToolSubst("%llvm_tools_dir", config.llvm_tools_dir),
]
def get_required_attr(config, attr_name):
attr_value = getattr(config, attr_name, None)
if attr_value == None:
lit_config.fatal(
"No attribute %r in test configuration! You may need to run "
"tests from your build directory or add this attribute "
"to lit.site.cfg " % attr_name
)
return attr_value
# If this is an MSVC environment, the tests at the root of the tree are
# unsupported. The local win_cdb test suite, however, is supported.
is_msvc = get_required_attr(config, "is_msvc")
if is_msvc:
config.available_features.add("msvc")
# FIXME: We should add some llvm lit utility code to find the Windows SDK
# and set up the environment appopriately.
win_sdk = "C:/Program Files (x86)/Windows Kits/10/"
arch = "x64"
llvm_config.with_system_environment(["LIB", "LIBPATH", "INCLUDE"])
# Clear _NT_SYMBOL_PATH to prevent cdb from attempting to load symbols from
# the network.
llvm_config.with_environment("_NT_SYMBOL_PATH", "")
tools.append(
ToolSubst("%cdb", '"%s"' % os.path.join(win_sdk, "Debuggers", arch, "cdb.exe"))
)
# clang_src_dir and lld_src_dir are not used by these tests, but are required by
# use_clang() and use_lld() respectively, so set them to "", if needed.
if not hasattr(config, "clang_src_dir"):
config.clang_src_dir = ""
llvm_config.use_clang(required=("clang" in config.llvm_enabled_projects))
if not hasattr(config, "lld_src_dir"):
config.lld_src_dir = ""
llvm_config.use_lld(required=("lld" in config.llvm_enabled_projects))
if "compiler-rt" in config.llvm_enabled_projects:
config.available_features.add("compiler-rt")
# Check which debuggers are available:
lldb_path = llvm_config.use_llvm_tool("lldb", search_env="LLDB")
if lldb_path is not None:
config.available_features.add("lldb")
def configure_dexter_substitutions():
"""Configure substitutions for host platform and return list of dependencies"""
# Produce dexter path, lldb path, and combine into the %dexter substitution
# for running a test.
dexter_path = os.path.join(
config.cross_project_tests_src_root, "debuginfo-tests", "dexter", "dexter.py"
)
dexter_test_cmd = '"{}" "{}" test'.format(sys.executable, dexter_path)
if lldb_path is not None:
dexter_test_cmd += ' --lldb-executable "{}"'.format(lldb_path)
tools.append(ToolSubst("%dexter", dexter_test_cmd))
# For testing other bits of dexter that aren't under the "test" subcommand,
# have a %dexter_base substitution.
dexter_base_cmd = '"{}" "{}"'.format(sys.executable, dexter_path)
tools.append(ToolSubst("%dexter_base", dexter_base_cmd))
# Set up commands for DexTer regression tests.
# Builder, debugger, optimisation level and several other flags differ
# depending on whether we're running a unix like or windows os.
if platform.system() == "Windows":
# The Windows builder script uses lld.
dependencies = ["clang", "lld-link"]
dexter_regression_test_builder = "clang-cl"
dexter_regression_test_debugger = "dbgeng"
dexter_regression_test_flags = "/Zi /Od"
else:
# Use lldb as the debugger on non-Windows platforms.
dependencies = ["clang", "lldb"]
dexter_regression_test_builder = "clang++"
dexter_regression_test_debugger = "lldb"
dexter_regression_test_flags = "-O0 -glldb -std=gnu++11"
tools.append(
ToolSubst("%dexter_regression_test_builder", dexter_regression_test_builder)
)
tools.append(
ToolSubst("%dexter_regression_test_debugger", dexter_regression_test_debugger)
)
# We don't need to distinguish cflags and ldflags because for Dexter
# regression tests we use clang to drive the linker, and so all flags will be
# passed in a single command.
tools.append(
ToolSubst("%dexter_regression_test_flags", dexter_regression_test_flags)
)
# Typical command would take the form:
# ./path_to_py/python.exe ./path_to_dex/dexter.py test --fail-lt 1.0 -w --binary %t --debugger lldb --cflags '-O0 -g'
dexter_regression_test_run = " ".join(
# "python", "dexter.py", test, fail_mode, builder, debugger, cflags, ldflags
[
'"{}"'.format(sys.executable),
'"{}"'.format(dexter_path),
"test",
"--fail-lt 1.0 -w",
"--debugger",
dexter_regression_test_debugger,
]
)
tools.append(ToolSubst("%dexter_regression_test_run", dexter_regression_test_run))
# Include build flags for %dexter_regression_test.
dexter_regression_test_build = " ".join(
[
dexter_regression_test_builder,
dexter_regression_test_flags,
]
)
tools.append(ToolSubst("%dexter_regression_test_build", dexter_regression_test_build))
return dependencies
def add_host_triple(clang):
return "{} --target={}".format(clang, config.host_triple)
# The set of arches we can build.
targets = set(config.targets_to_build)
# Add aliases to the target set.
if "AArch64" in targets:
targets.add("arm64")
if "ARM" in config.targets_to_build:
targets.add("thumbv7")
def can_target_host():
# Check if the targets set contains anything that looks like our host arch.
# The arch name in the triple and targets set may be spelled differently
# (e.g. x86 vs X86).
return any(config.host_triple.lower().startswith(x.lower()) for x in targets)
# Dexter tests run on the host machine. If the host arch is supported add
# 'dexter' as an available feature and force the dexter tests to use the host
# triple.
if can_target_host():
if config.host_triple != config.target_triple:
print("Forcing dexter tests to use host triple {}.".format(config.host_triple))
dependencies = configure_dexter_substitutions()
if all(d in config.available_features for d in dependencies):
config.available_features.add("dexter")
llvm_config.with_environment(
"PATHTOCLANG", add_host_triple(llvm_config.config.clang)
)
llvm_config.with_environment(
"PATHTOCLANGPP", add_host_triple(llvm_config.use_llvm_tool("clang++"))
)
llvm_config.with_environment(
"PATHTOCLANGCL", add_host_triple(llvm_config.use_llvm_tool("clang-cl"))
)
else:
print(
"Host triple {} not supported. Skipping dexter tests in the "
"debuginfo-tests project.".format(config.host_triple)
)
tool_dirs = [config.llvm_tools_dir]
llvm_config.add_tool_substitutions(tools, tool_dirs)
lit.util.usePlatformSdkOnDarwin(config, lit_config)
if platform.system() == "Darwin":
xcode_lldb_vers = subprocess.check_output(["xcrun", "lldb", "--version"]).decode(
"utf-8"
)
match = re.search("lldb-(\d+)", xcode_lldb_vers)
if match:
apple_lldb_vers = int(match.group(1))
if apple_lldb_vers < 1000:
config.available_features.add("apple-lldb-pre-1000")
def get_gdb_version_string():
"""Return gdb's version string, or None if gdb cannot be found or the
--version output is formatted unexpectedly.
"""
# See if we can get a gdb version, e.g.
# $ gdb --version
# GNU gdb (GDB) 10.2
# ...More stuff...
try:
gdb_vers_lines = (
subprocess.check_output(["gdb", "--version"]).decode().splitlines()
)
except:
return None # We coudln't find gdb or something went wrong running it.
if len(gdb_vers_lines) < 1:
print("Unkown GDB version format (too few lines)", file=sys.stderr)
return None
match = re.search("GNU gdb \(.*?\) ((\d|\.)+)", gdb_vers_lines[0].strip())
if match is None:
print(f"Unkown GDB version format: {gdb_vers_lines[0]}", file=sys.stderr)
return None
return match.group(1)
def get_clang_default_dwarf_version_string(triple):
"""Return the default dwarf version string for clang on this (host) platform
or None if we can't work it out.
"""
# Get the flags passed by the driver and look for -dwarf-version.
cmd = f'{llvm_config.use_llvm_tool("clang")} -g -xc -c - -v -### --target={triple}'
stderr = subprocess.run(cmd.split(), stderr=subprocess.PIPE).stderr.decode()
match = re.search("-dwarf-version=(\d+)", stderr)
if match is None:
print("Cannot determine default dwarf version", file=sys.stderr)
return None
return match.group(1)
# Some cross-project-tests use gdb, but not all versions of gdb are compatible
# with clang's dwarf. Add feature `gdb-clang-incompatibility` to signal that
# there's an incompatibility between clang's default dwarf version for this
# platform and the installed gdb version.
dwarf_version_string = get_clang_default_dwarf_version_string(config.host_triple)
gdb_version_string = get_gdb_version_string()
if dwarf_version_string and gdb_version_string:
if int(dwarf_version_string) >= 5:
try:
from packaging import version
except:
lit_config.fatal("Running gdb tests requires the packaging package")
if version.parse(gdb_version_string) < version.parse("10.1"):
# Example for llgdb-tests, which use lldb on darwin but gdb elsewhere:
# XFAIL: !system-darwin && gdb-clang-incompatibility
config.available_features.add("gdb-clang-incompatibility")
print(
"XFAIL some tests: use gdb version >= 10.1 to restore test coverage",
file=sys.stderr,
)
llvm_config.feature_config([("--build-mode", {"Debug|RelWithDebInfo": "debug-info"})])
# Allow 'REQUIRES: XXX-registered-target' in tests.
for arch in config.targets_to_build:
config.available_features.add(arch.lower() + "-registered-target")
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