[asan] add racy double-free test

llvm-svn: 153586

1 files changed, 32 insertions, 0 deletions

diff --git a/compiler-rt/lib/asan/tests/asan_racy_double_free_test.cc b/compiler-rt/lib/asan/tests/asan_racy_double_free_test.cc
new file mode 100644
index 00000000000..12be9af2647
--- /dev/null
+++ b/compiler-rt/lib/asan/tests/asan_racy_double_free_test.cc
@@ -0,0 +1,32 @@
+#include <pthread.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+const int N = 1000;
+void *x[N];
+
+void *Thread1(void *) {
+  for (int i = 0; i < N; i++) {
+    fprintf(stderr, "%s %d\n", __FUNCTION__, i);
+    free(x[i]);
+  }
+  return NULL;
+}
+
+void *Thread2(void *) {
+  for (int i = 0; i < N; i++) {
+    fprintf(stderr, "%s %d\n", __FUNCTION__, i);
+    free(x[i]);
+  }
+  return NULL;
+}
+
+int main() {
+  for (int i = 0; i < N; i++)
+    x[i] = malloc(128);
+  pthread_t t[2];
+  pthread_create(&t[0], 0, Thread1, 0);
+  pthread_create(&t[1], 0, Thread2, 0);
+  pthread_join(t[0], 0);
+  pthread_join(t[1], 0);
+}