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 = 'MemorySanitizer'
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-msan")
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  msan_site_cfg = lit.params.get('msan_site_config', None)
31  if (msan_site_cfg) and (os.path.exists(msan_site_cfg)):
32    lit.load_config(config, msan_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  msan_site_cfg = os.path.join(llvm_obj_root, "projects", "compiler-rt",
44                               "lib", "msan", "lit_tests", "lit.site.cfg")
45  if (not msan_site_cfg) or (not os.path.exists(msan_site_cfg)):
46    DisplayNoConfigMessage()
47
48  lit.load_config(config, msan_site_cfg)
49  raise SystemExit
50
51# Setup default compiler flags used with -fsanitize=memory option.
52clang_msan_cflags = ["-fsanitize=memory",
53                     "-mno-omit-leaf-frame-pointer",
54                     "-fno-omit-frame-pointer",
55                     "-fno-optimize-sibling-calls",
56                     "-g"]
57clang_msan_cxxflags = ["--driver-mode=g++ "] + clang_msan_cflags
58config.substitutions.append( ("%clang_msan ",
59                              " ".join([config.clang] + clang_msan_cflags) + 
60                              " ") )
61config.substitutions.append( ("%clangxx_msan ",
62                              " ".join([config.clang] + clang_msan_cxxflags) + 
63                              " ") )
64
65# Setup path to external LLVM symbolizer to run MemorySanitizer output tests.
66config.environment['MSAN_SYMBOLIZER_PATH'] = config.llvm_symbolizer_path
67
68# Default test suffixes.
69config.suffixes = ['.c', '.cc', '.cpp']
70
71# MemorySanitizer tests are currently supported on Linux only.
72if config.host_os not in ['Linux']:
73  config.unsupported = True
74