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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.fatal("No attribute %r in test configuration! You may need to run "
9              "tests from your build directory or add this attribute "
10              "to lit.site.cfg " % attr_name)
11  return attr_value
12
13# Setup config name.
14config.name = 'ThreadSanitizer'
15
16# Setup source root.
17config.test_source_root = os.path.dirname(__file__)
18
19def DisplayNoConfigMessage():
20  lit.fatal("No site specific configuration available! " +
21            "Try running your test from the build tree or running " +
22            "make check-tsan")
23
24# Figure out LLVM source root.
25llvm_src_root = getattr(config, 'llvm_src_root', None)
26if llvm_src_root is None:
27  # We probably haven't loaded the site-specific configuration: the user
28  # is likely trying to run a test file directly, and the site configuration
29  # wasn't created by the build system.
30  tsan_site_cfg = lit.params.get('tsan_site_config', None)
31  if (tsan_site_cfg) and (os.path.exists(tsan_site_cfg)):
32    lit.load_config(config, tsan_site_cfg)
33    raise SystemExit
34
35  # Try to guess the location of site-specific configuration using llvm-config
36  # util that can point where the build tree is.
37  llvm_config = lit.util.which("llvm-config", config.environment["PATH"])
38  if not llvm_config:
39    DisplayNoConfigMessage()
40
41  # Find out the presumed location of generated site config.
42  llvm_obj_root = lit.util.capture(["llvm-config", "--obj-root"]).strip()
43  tsan_site_cfg = os.path.join(llvm_obj_root, "projects", "compiler-rt",
44                               "lib", "tsan", "lit_tests", "lit.site.cfg")
45  if (not tsan_site_cfg) or (not os.path.exists(tsan_site_cfg)):
46    DisplayNoConfigMessage()
47
48  lit.load_config(config, tsan_site_cfg)
49  raise SystemExit
50
51# Setup environment variables for running ThreadSanitizer.
52tsan_options = "atexit_sleep_ms=0"
53# Set path to external LLVM symbolizer to run ThreadSanitizer output tests.
54tsan_options += " " + "external_symbolizer_path=" + config.llvm_symbolizer_path
55
56config.environment['TSAN_OPTIONS'] = tsan_options
57
58# Setup default compiler flags used with -fsanitize=thread option.
59# FIXME: Review the set of required flags and check if it can be reduced.
60clang_tsan_cflags = ("-fsanitize=thread "
61                      + "-g "
62                      + "-Wall "
63                      + "-lpthread "
64                      + "-ldl ")
65clang_tsan_cxxflags = "--driver-mode=g++ " + clang_tsan_cflags
66config.substitutions.append( ("%clangxx_tsan ", (" " + config.clang + " " +
67                                                clang_tsan_cxxflags + " ")) )
68config.substitutions.append( ("%clang_tsan ", (" " + config.clang + " " +
69                                              clang_tsan_cflags + " ")) )
70
71# Define CHECK-%os to check for OS-dependent output.
72config.substitutions.append( ('CHECK-%os', ("CHECK-" + config.host_os)))
73
74# Default test suffixes.
75config.suffixes = ['.c', '.cc', '.cpp']
76
77# ThreadSanitizer tests are currently supported on Linux only.
78if config.host_os not in ['Linux']:
79  config.unsupported = True
80