Add fprintf debug output for TSan acquire/release

Julian Lettner · Julian Lettner · commit 864026699ddb · 2021-06-24T18:15:58.000-07:00
diff --git a/stdlib/public/Concurrency/ThreadSanitizer.cpp b/stdlib/public/Concurrency/ThreadSanitizer.cpp
@@ -31,12 +31,18 @@ TSanFunc *tsan_acquire, *tsan_release;
 void swift::_swift_tsan_acquire(void *addr) {
   if (tsan_acquire) {
     tsan_acquire(addr);
+#if SWIFT_TASK_PRINTF_DEBUG
+    fprintf(stderr, "[%lu] tsan_acquire on %p\n", _swift_get_thread_id(), addr);
+#endif
   }
 }
 
 void swift::_swift_tsan_release(void *addr) {
   if (tsan_release) {
     tsan_release(addr);
+#if SWIFT_TASK_PRINTF_DEBUG
+    fprintf(stderr, "[%lu] tsan_release on %p\n", _swift_get_thread_id(), addr);
+#endif
   }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -31,12 +31,18 @@ TSanFunc tsan_acquire, tsan_release;`
`31`	`31`	`void swift::_swift_tsan_acquire(void *addr) {`
`32`	`32`	`if (tsan_acquire) {`
`33`	`33`	`tsan_acquire(addr);`
	`34`	`+#if SWIFT_TASK_PRINTF_DEBUG`
	`35`	`+ fprintf(stderr, "[%lu] tsan_acquire on %p\n", _swift_get_thread_id(), addr);`
	`36`	`+#endif`
`34`	`37`	`}`
`35`	`38`	`}`
`36`	`39`
`37`	`40`	`void swift::_swift_tsan_release(void *addr) {`
`38`	`41`	`if (tsan_release) {`
`39`	`42`	`tsan_release(addr);`
	`43`	`+#if SWIFT_TASK_PRINTF_DEBUG`
	`44`	`+ fprintf(stderr, "[%lu] tsan_release on %p\n", _swift_get_thread_id(), addr);`
	`45`	`+#endif`
`40`	`46`	`}`
`41`	`47`	`}`
`42`	`48`