1 files changed, 27 insertions, 0 deletions
diff --git a/test/asan/TestCases/double-free.cc b/test/asan/TestCases/double-free.cc
new file mode 100644
index 0000000000000..f0dd29174849a
--- /dev/null
+++ b/test/asan/TestCases/double-free.cc
@@ -0,0 +1,27 @@
+// RUN: %clangxx_asan -O0 %s -o %t 2>&1
+// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX
+
+// Also works if no malloc context is available.
+// RUN: env ASAN_OPTIONS=malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
+// RUN: env ASAN_OPTIONS=malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
+// XFAIL: arm-linux-gnueabi
+// XFAIL: armv7l-unknown-linux-gnueabihf
+
+#include <stdlib.h>
+#include <string.h>
+int main(int argc, char **argv) {
+  char *x = (char*)malloc(10 * sizeof(char));
+  memset(x, 0, 10);
+  int res = x[argc];
+  free(x);
+  free(x + argc - 1);  // BOOM
+  // CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0
+  // CHECK: #0 0x{{.*}} in {{.*}}free
+  // CHECK: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-3]]
+  // CHECK: freed by thread T0 here:
+  // MALLOC-CTX: #0 0x{{.*}} in {{.*}}free
+  // MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-7]]
+  // CHECK: allocated by thread T0 here:
+  // MALLOC-CTX: double-free.cc:[[@LINE-12]]
+  return res;
+}