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1# -*- Python -*-
2
3import os
4
5def get_required_attr(config, attr_name):
6  attr_value = getattr(config, attr_name, None)
7  if not attr_value:
8    lit_config.fatal(
9      "No attribute %r in test configuration! You may need to run "
10      "tests from your build directory or add this attribute "
11      "to lit.site.cfg " % attr_name)
12  return attr_value
13
14# Setup config name.
15config.name = 'ThreadSanitizer' + config.name_suffix
16
17# Setup source root.
18config.test_source_root = os.path.dirname(__file__)
19
20# Setup environment variables for running ThreadSanitizer.
21default_tsan_opts = "atexit_sleep_ms=0"
22
23if config.host_os == 'Darwin':
24  # On Darwin, we default to `abort_on_error=1`, which would make tests run
25  # much slower. Let's override this and run lit tests with 'abort_on_error=0'.
26  default_tsan_opts += ':abort_on_error=0'
27
28# Platform-specific default TSAN_OPTIONS for lit tests.
29if default_tsan_opts:
30  config.environment['TSAN_OPTIONS'] = default_tsan_opts
31  default_tsan_opts += ':'
32config.substitutions.append(('%env_tsan_opts=',
33                             'env TSAN_OPTIONS=' + default_tsan_opts))
34
35# GCC driver doesn't add necessary compile/link flags with -fsanitize=thread.
36if config.compiler_id == 'GNU':
37  extra_cflags = ["-fPIE", "-pthread", "-ldl", "-lstdc++", "-lrt", "-pie"]
38else:
39  extra_cflags = []
40
41# Setup default compiler flags used with -fsanitize=thread option.
42clang_tsan_cflags = (["-fsanitize=thread",
43                      "-Wall"] +
44                      [config.target_cflags] +
45                      config.debug_info_flags +
46                      extra_cflags)
47clang_tsan_cxxflags = config.cxx_mode_flags + clang_tsan_cflags
48# Add additional flags if we're using instrumented libc++.
49# Instrumented libcxx currently not supported on Darwin.
50if config.has_libcxx and config.host_os != 'Darwin':
51  # FIXME: Dehardcode this path somehow.
52  libcxx_path = os.path.join(config.compiler_rt_obj_root, "lib",
53                             "tsan", "libcxx_tsan_" + config.target_arch)
54  libcxx_incdir = os.path.join(libcxx_path, "include", "c++", "v1")
55  libcxx_libdir = os.path.join(libcxx_path, "lib")
56  libcxx_so = os.path.join(libcxx_libdir, "libc++.so")
57  clang_tsan_cxxflags += ["-std=c++11",
58                          "-nostdinc++",
59                          "-I%s" % libcxx_incdir,
60                          libcxx_so,
61                          "-Wl,-rpath=%s" % libcxx_libdir]
62
63def build_invocation(compile_flags):
64  return " " + " ".join([config.clang] + compile_flags) + " "
65
66config.substitutions.append( ("%clang_tsan ", build_invocation(clang_tsan_cflags)) )
67config.substitutions.append( ("%clangxx_tsan ", build_invocation(clang_tsan_cxxflags)) )
68
69# Define CHECK-%os to check for OS-dependent output.
70config.substitutions.append( ('CHECK-%os', ("CHECK-" + config.host_os)))
71
72config.substitutions.append( ("%deflake ", os.path.join(os.path.dirname(__file__), "deflake.bash")) )
73
74# Default test suffixes.
75config.suffixes = ['.c', '.cc', '.cpp', '.m', '.mm']
76
77# ThreadSanitizer tests are currently supported on FreeBSD, Linux and Darwin.
78if config.host_os not in ['FreeBSD', 'Linux', 'Darwin']:
79  config.unsupported = True
80
81# Allow tests to use REQUIRES=stable-runtime.  For use when you cannot use XFAIL
82# because the test hangs.
83if config.target_arch != 'aarch64':
84  config.available_features.add('stable-runtime')
85