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-rw-r--r--test/tsan/thread_detach2.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/test/tsan/thread_detach2.c b/test/tsan/thread_detach2.c
new file mode 100644
index 000000000000..8133980ba5a1
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+++ b/test/tsan/thread_detach2.c
@@ -0,0 +1,28 @@
+// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+#include "test.h"
+
+// Test for https://llvm.org/bugs/show_bug.cgi?id=23235
+// The bug was that synchronization between thread creation and thread start
+// is not established if pthread_create is followed by pthread_detach.
+
+int x;
+
+void *Thread(void *a) {
+ x = 42;
+ barrier_wait(&barrier);
+ return 0;
+}
+
+int main() {
+ barrier_init(&barrier, 2);
+ pthread_t t;
+ x = 43;
+ pthread_create(&t, 0, Thread, 0);
+ pthread_detach(t);
+ barrier_wait(&barrier);
+ printf("PASS\n");
+ return 0;
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer: data race
+// CHECK: PASS