1// RUN: %clangxx_asan -O0 %s -o %t 2>&1
2// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX
3
4// Also works if no malloc context is available.
5// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
6// RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
7
8// RUN: %clangxx_asan -O0 -fsanitize-recover=address %s -o %t 2>&1
9// RUN: %env_asan_opts=halt_on_error=false %run %t 2>&1 | FileCheck %s --check-prefix CHECK-RECOVER
10
11// XFAIL: arm-linux-gnueabi
12// XFAIL: armv7l-unknown-linux-gnueabihf
13
14#include <stdlib.h>
15#include <string.h>
16int main(int argc, char **argv) {
17  char *x = (char*)malloc(10 * sizeof(char));
18  memset(x, 0, 10);
19  int res = x[argc];
20  free(x);
21  free(x + argc - 1);  // BOOM
22  // CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0
23  // CHECK: #0 0x{{.*}} in {{.*}}free
24  // CHECK: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-3]]
25  // CHECK: freed by thread T0 here:
26  // MALLOC-CTX: #0 0x{{.*}} in {{.*}}free
27  // MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-7]]
28  // CHECK: allocated by thread T0 here:
29  // MALLOC-CTX: double-free.cc:[[@LINE-12]]
30  // CHECK-RECOVER: AddressSanitizer: attempting double-free{{.*}}in thread T0
31  // CHECK-RECOVER-NOT: AddressSanitizer CHECK failed:
32  return res;
33}
34