Automatically set path to sanitizer runtime when running tests on macOS.

[aprantl]

Summary

Automatically set path to sanitizer runtime when running tests on macOS.

rdar://problem/42984739

[vsk]

Thanks so much for doing this!

lit/Suite/lit.cfg

28

This might be easier to read as either import commands; commands.getoutput(...) or check_output(..., shell=True).strip(). Then it's possible to drop the [:-1], which is nice, because it's not clear that that strips a trailing newline.

31

The dash should be an underscore, and lldb hits false positives when the container overflow check is enabled. How about: ASAN_OPTIONS=detect_stack_use_after_return=1:container_overflow=0?

[vsk]

(LGTM with the second comment addressed.)

[aprantl]

Thanks, that was quite helpful!

lit/Suite/lit.cfg

 config.suffixes = ['.py']
 
 # test_source_root: The root path where tests are located.
 # test_exec_root: The root path where tests should be run.
 config.test_source_root = os.path.join(config.lldb_src_root, 'packages',
                                        'Python', 'lldbsuite', 'test')
 config.test_exec_root = config.test_source_root
 
+# macOS flags needed for LLDB built with address sanitizer.
+if 'Address' in config.llvm_use_sanitizer and \
+   'Darwin' in config.host_os and \
+   'x86' in config.host_triple:
+  import subprocess
+  resource_dir = subprocess.check_output(config.cmake_cxx_compiler +
+                                         ' -print-resource-dir', shell=True)
+  runtime = os.path.join(resource_dir[:-1],
+                         'lib/darwin/libclang_rt.asan_osx_dynamic.dylib')
+  config.environment['ASAN_OPTIONS'] =  'detect_stack_use-after_return=1'
+  config.environment['DYLD_INSERT_LIBRARIES'] = runtime
+
 # Build dotest command.
 dotest_cmd = [config.dotest_path, '-q']
 dotest_cmd.extend(config.dotest_args_str.split(';'))
 
 # We don't want to force users passing arguments to lit to use `;` as a
 # separator. We use Python's simple lexical analyzer to turn the args into a
 # list.
 if config.dotest_lit_args_str:
   dotest_cmd.extend(shlex.split(config.dotest_lit_args_str))
 
 # Load LLDB test format.
 sys.path.append(os.path.join(config.lldb_src_root, "lit", "Suite"))
 import lldbtest
 
 # testFormat: The test format to use to interpret tests.
 config.test_format = lldbtest.LLDBTest(dotest_cmd)

lit/Suite/lit.site.cfg.in

 @LIT_SITE_CFG_IN_HEADER@
 
 config.test_exec_root = "@LLVM_BINARY_DIR@"
 config.llvm_src_root = "@LLVM_SOURCE_DIR@"
 config.llvm_obj_root = "@LLVM_BINARY_DIR@"
 config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
 config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
 config.llvm_build_mode = "@LLVM_BUILD_MODE@"
 config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.lldb_obj_root = "@LLDB_BINARY_DIR@"
 config.lldb_src_root = "@LLDB_SOURCE_DIR@"
+config.cmake_cxx_compiler = "@CMAKE_CXX_COMPILER@"
+config.host_os = "@HOST_OS@"
+config.host_triple = "@LLVM_HOST_TRIPLE@"
+config.llvm_use_sanitizer = "@LLVM_USE_SANITIZER@"
 config.target_triple = "@TARGET_TRIPLE@"
 config.python_executable = "@PYTHON_EXECUTABLE@"
 config.dotest_path = "@LLDB_SOURCE_DIR@/test/dotest.py"
 config.dotest_args_str = "@LLDB_DOTEST_ARGS@"
 config.lldb_disable_python = @LLDB_DISABLE_PYTHON@
 config.dotest_lit_args_str = None
 
 # Additional dotest arguments can be passed to lit by providing a