[TSan] Add a test case for r209939

llvm-svn: 209940

compiler-rt/test/tsan/Helpers/blacklist.txt

@@ -1 +1,2 @@
 fun:*Blacklisted_Thread2*
+fun:*CallTouchGlobal*

compiler-rt/test/tsan/blacklist2.cc

@@ -0,0 +1,46 @@
+// Test that blacklisted functions are still contained in the stack trace.
+
+// RUN: %clangxx_tsan -O1 %s -fsanitize-blacklist=%p/Helpers/blacklist.txt -o %t
+// RUN: %deflake %run %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int Global;
+
+void *Thread1(void *x) {
+  sleep(1);
+  // CHECK: ThreadSanitizer: data race
+  // CHECK: Write of size 4
+  // CHECK: #0 Thread1{{.*}}blacklist2.cc:[[@LINE+1]]
+  Global++;
+  return NULL;
+}
+
+void TouchGlobal() {
+  // CHECK: Previous write of size 4
+  // CHECK: #0 TouchGlobal(){{.*}}blacklist2.cc:[[@LINE+1]]
+  Global--;
+}
+
+void CallTouchGlobal() {
+  // CHECK: #1 CallTouchGlobal{{.*}}blacklist2.cc:[[@LINE+1]]
+  TouchGlobal();
+}
+
+void *Blacklisted_Thread2(void *x) {
+  Global--;
+  // CHECK: #2 Blacklisted_Thread2{{.*}}blacklist2.cc:[[@LINE+1]]
+  CallTouchGlobal();
+  return NULL;
+}
+
+int main() {
+  pthread_t t[2];
+  pthread_create(&t[0], NULL, Thread1, NULL);
+  pthread_create(&t[1], NULL, Blacklisted_Thread2, NULL);
+  pthread_join(t[0], NULL);
+  pthread_join(t[1], NULL);
+  printf("PASS\n");
+  return 0;
+}