[lldb] Make TSan errors fatal when running the test suite

Set the halt_on_error runtime flag to make TSan errors fatal when
running the test suite. For the API tests the environment variables are
set conditionally on whether the TSan is enabled. The Shell and Unit
tests don't have that logic but setting the environment variable is
harmless. For consistency, I've also mirrored the ASAN option
(detect_stack_use_after_return=1) for the Shell tests.

Differential revision: https://reviews.llvm.org/D157152

lldb/test/API/lit.cfg.py

@@ -123,6 +123,7 @@ if is_configured("llvm_use_sanitizer"):
             )
 
     if "Thread" in config.llvm_use_sanitizer:
+        config.environment["TSAN_OPTIONS"] = "halt_on_error=1"
         if "Darwin" in config.host_os:
             config.environment["DYLD_INSERT_LIBRARIES"] = find_sanitizer_runtime(
                 "libclang_rt.tsan_osx_dynamic.dylib"

lldb/test/Shell/lit.cfg.py

@@ -48,6 +48,10 @@ llvm_config.with_system_environment(
     ]
 )
 
+# Enable sanitizer runtime flags.
+config.environment["ASAN_OPTIONS"] = "detect_stack_use_after_return=1"
+config.environment["TSAN_OPTIONS"] = "halt_on_error=1"
+
 # Support running the test suite under the lldb-repro wrapper. This makes it
 # possible to capture a test suite run and then rerun all the test from the
 # just captured reproducer.

lldb/test/Unit/lit.cfg.py

@@ -34,5 +34,9 @@ llvm_config.with_system_environment(
 )
 llvm_config.with_environment("PATH", os.path.dirname(sys.executable), append_path=True)
 
+# Enable sanitizer runtime flags.
+config.environment["ASAN_OPTIONS"] = "detect_stack_use_after_return=1"
+config.environment["TSAN_OPTIONS"] = "halt_on_error=1"
+
 # testFormat: The test format to use to interpret tests.
 config.test_format = lit.formats.GoogleTest(config.llvm_build_mode, "Tests")