[tsan] Add a Darwin-specific lit test directory

[kubamracek]

Summary

To test Darwin-specific changes and bugs, this patch creates a test/Darwin/ directory, allows '.mm' file extension for tests and adds a simple test that verifies that an Obj-C program can run and quit successfully.

[glider]

LGTM

test/tsan/Darwin/objc_bootstrap.mm

1 ↗

(On Diff #40030)

Why is the file called "objc_bootstrap"? What are we bootstrapping here?

test/tsan/lit.cfg

67 ↗

(On Diff #40030)

What about .m files?

[kubamracek]

Why is the file called "objc_bootstrap"? What are we bootstrapping here?

It was meant that TSan can actually bootstrap fine. Never mind, renamed to "objc-simple".

What about .m files?

Added.

compiler-rt/trunk/test/tsan/Darwin/lit.local.cfg

+def getRoot(config):
+  if not config.parent:
+    return config
+  return getRoot(config.parent)
+
+root = getRoot(config)
+
+if root.host_os not in ['Darwin']:
+  config.unsupported = True

compiler-rt/trunk/test/tsan/Darwin/objc-simple.mm

+// Test that a simple Obj-C program runs and exits without any warnings.
+
+// RUN: %clang_tsan %s -o %t -framework Foundation
+// RUN: %run %t 2>&1
+
+#import <Foundation/Foundation.h>
+
+int main() {
+  NSLog(@"Hello world");
+}
+
+// CHECK: Hello world
+// CHECK-NOT: WARNING: ThreadSanitizer

compiler-rt/trunk/test/tsan/lit.cfg

 config.substitutions.append( ("%clangxx_tsan ", build_invocation(clang_tsan_cxxflags)) )
 
 # Define CHECK-%os to check for OS-dependent output.
 config.substitutions.append( ('CHECK-%os', ("CHECK-" + config.host_os)))
 
 config.substitutions.append( ("%deflake ", os.path.join(os.path.dirname(__file__), "deflake.bash")) )
 
 # Default test suffixes.
-config.suffixes = ['.c', '.cc', '.cpp']
+config.suffixes = ['.c', '.cc', '.cpp', '.m', '.mm']
 
 # ThreadSanitizer tests are currently supported on FreeBSD, Linux and Darwin.
 if config.host_os not in ['FreeBSD', 'Linux', 'Darwin']:
   config.unsupported = True
 
 # Allow tests to use REQUIRES=stable-runtime.  For use when you cannot use XFAIL
 # because the test hangs.
 if config.target_arch != 'aarch64':
   config.available_features.add('stable-runtime')