Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 36 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/c-c++-common/tsan/write_in_reader_lock.c b/gcc-4.9/gcc/testsuite/c-c++-common/tsan/write_in_reader_lock.c
new file mode 100644
index 000000000..898d23d50
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/c-c++-common/tsan/write_in_reader_lock.c
@@ -0,0 +1,36 @@
+/* { dg-shouldfail "tsan" } */
+
+#include <pthread.h>
+#include <unistd.h>
+
+pthread_rwlock_t rwlock;
+int GLOB;
+
+void *Thread1(void *p) {
+ (void)p;
+  pthread_rwlock_rdlock(&rwlock);
+  // Write under reader lock.
+  sleep(1);
+  GLOB++;
+  pthread_rwlock_unlock(&rwlock);
+  return 0;
+}
+
+int main(int argc, char *argv[]) {
+  pthread_rwlock_init(&rwlock, NULL);
+  pthread_rwlock_rdlock(&rwlock);
+  pthread_t t;
+  pthread_create(&t, 0, Thread1, 0);
+  volatile int x = GLOB;
+ (void)x;
+  pthread_rwlock_unlock(&rwlock);
+  pthread_join(t, 0);
+  pthread_rwlock_destroy(&rwlock);
+  return 0;
+}
+
+/* { dg-output "WARNING: ThreadSanitizer: data race.*(\n|\r\n|\r)" } */
+/* { dg-output "  Write of size 4 at 0x\[0-9a-f\]+ by thread T1.*:(\n|\r\n|\r).*" } */
+/* { dg-output "    #0 Thread1.*\(write_in_reader_lock.c|\\?{2}\):\[0-9\]+ .*" } */
+/* { dg-output "  Previous read of size 4 at.* by main thread.*:(\n|\r\n|\r).*" } */
+/* { dg-output "    #0 main.*\(write_in_reader_lock.c|\\?{2}\):\[0-9\]+.*" } */