Import compiler-rt r160957.vendor/compiler-rt/compiler-rt-r160957

1 files changed, 65 insertions, 0 deletions

diff --git a/lib/tsan/output_tests/simple_stack.c b/lib/tsan/output_tests/simple_stack.c
new file mode 100644
index 000000000000..2e94f23f3c46
--- /dev/null
+++ b/lib/tsan/output_tests/simple_stack.c
@@ -0,0 +1,65 @@
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int Global;
+
+void __attribute__((noinline)) foo1() {
+  Global = 42;
+}
+
+void __attribute__((noinline)) bar1() {
+  volatile int tmp = 42; (void)tmp;
+  foo1();
+}
+
+void __attribute__((noinline)) foo2() {
+  volatile int v = Global; (void)v;
+}
+
+void __attribute__((noinline)) bar2() {
+  volatile int tmp = 42; (void)tmp;
+  foo2();
+}
+
+void *Thread1(void *x) {
+  usleep(1000000);
+  bar1();
+  return NULL;
+}
+
+void *Thread2(void *x) {
+  bar2();
+  return NULL;
+}
+
+void StartThread(pthread_t *t, void *(*f)(void*)) {
+  pthread_create(t, NULL, f, NULL);
+}
+
+int main() {
+  pthread_t t[2];
+  StartThread(&t[0], Thread1);
+  StartThread(&t[1], Thread2);
+  pthread_join(t[0], NULL);
+  pthread_join(t[1], NULL);
+  return 0;
+}
+
+// CHECK:      WARNING: ThreadSanitizer: data race
+// CHECK-NEXT:   Write of size 4 at {{.*}} by thread 1:
+// CHECK-NEXT:     #0 foo1 {{.*}}simple_stack.c:8{{(:3)?}} ({{.*}})
+// CHECK-NEXT:     #1 bar1 {{.*}}simple_stack.c:13{{(:3)?}} ({{.*}})
+// CHECK-NEXT:     #2 Thread1 {{.*}}simple_stack.c:27{{(:3)?}} ({{.*}})
+// CHECK-NEXT:   Previous read of size 4 at {{.*}} by thread 2:
+// CHECK-NEXT:     #0 foo2 {{.*}}simple_stack.c:17{{(:26)?}} ({{.*}})
+// CHECK-NEXT:     #1 bar2 {{.*}}simple_stack.c:22{{(:3)?}} ({{.*}})
+// CHECK-NEXT:     #2 Thread2 {{.*}}simple_stack.c:32{{(:3)?}} ({{.*}})
+// CHECK-NEXT:   Thread 1 (running) created at:
+// CHECK-NEXT:     #0 pthread_create {{.*}} ({{.*}})
+// CHECK-NEXT:     #1 StartThread {{.*}}simple_stack.c:37{{(:3)?}} ({{.*}})
+// CHECK-NEXT:     #2 main {{.*}}simple_stack.c:42{{(:3)?}} ({{.*}})
+// CHECK-NEXT:   Thread 2 ({{.*}}) created at:
+// CHECK-NEXT:     #0 pthread_create {{.*}} ({{.*}})
+// CHECK-NEXT:     #1 StartThread {{.*}}simple_stack.c:37{{(:3)?}} ({{.*}})
+// CHECK-NEXT:     #2 main {{.*}}simple_stack.c:43{{(:3)?}} ({{.*}})