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      1 # -*- Python -*-
      2 
      3 import os
      4 
      5 def 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.
     15 config.name = 'ThreadSanitizer' + config.name_suffix
     16 
     17 # Setup source root.
     18 config.test_source_root = os.path.dirname(__file__)
     19 
     20 # Setup environment variables for running ThreadSanitizer.
     21 default_tsan_opts = "atexit_sleep_ms=0"
     22 
     23 if 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.
     29 if default_tsan_opts:
     30   config.environment['TSAN_OPTIONS'] = default_tsan_opts
     31   default_tsan_opts += ':'
     32 config.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.
     36 if config.compiler_id == 'GNU':
     37   extra_cflags = ["-fPIE", "-pthread", "-ldl", "-lstdc++", "-lrt", "-pie"]
     38 else:
     39   extra_cflags = []
     40 
     41 # Setup default compiler flags used with -fsanitize=thread option.
     42 clang_tsan_cflags = (["-fsanitize=thread",
     43                       "-Wall"] +
     44                       [config.target_cflags] +
     45                       config.debug_info_flags +
     46                       extra_cflags)
     47 clang_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.
     50 if 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 
     63 def build_invocation(compile_flags):
     64   return " " + " ".join([config.clang] + compile_flags) + " "
     65 
     66 config.substitutions.append( ("%clang_tsan ", build_invocation(clang_tsan_cflags)) )
     67 config.substitutions.append( ("%clangxx_tsan ", build_invocation(clang_tsan_cxxflags)) )
     68 
     69 # Define CHECK-%os to check for OS-dependent output.
     70 config.substitutions.append( ('CHECK-%os', ("CHECK-" + config.host_os)))
     71 
     72 config.substitutions.append( ("%deflake ", os.path.join(os.path.dirname(__file__), "deflake.bash")) )
     73 
     74 # Default test suffixes.
     75 config.suffixes = ['.c', '.cc', '.cpp', '.m', '.mm']
     76 
     77 # ThreadSanitizer tests are currently supported on FreeBSD, Linux and Darwin.
     78 if 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.
     83 if config.target_arch != 'aarch64':
     84   config.available_features.add('stable-runtime')
     85