1// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
2// RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
3// RUN: %clangxx_asan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
4// RUN: %clangxx_asan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
5// XFAIL: arm-linux-gnueabi
6
7// Test use-after-free report in the case when access is at the right border of
8// the allocation.
9
10#include <stdlib.h>
11int main() {
12  volatile char *x = (char*)malloc(sizeof(char));
13  free((void*)x);
14  *x = 42;
15  // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
16  // CHECK:   {{0x.* at pc 0x.* bp 0x.* sp 0x.*}}
17  // CHECK: {{WRITE of size 1 at 0x.* thread T0}}
18  // CHECK: {{    #0 0x.* in main .*use-after-free-right.cc:}}[[@LINE-4]]
19  // CHECK: {{0x.* is located 0 bytes inside of 1-byte region .0x.*,0x.*}}
20  // CHECK: {{freed by thread T0 here:}}
21
22  // CHECK-Linux: {{    #0 0x.* in .*free}}
23  // CHECK-Linux: {{    #1 0x.* in main .*use-after-free-right.cc:}}[[@LINE-10]]
24
25  // CHECK-Darwin: {{    #0 0x.* in wrap_free}}
26  // CHECK-Darwin: {{    #1 0x.* in main .*use-after-free-right.cc:}}[[@LINE-13]]
27
28  // CHECK: {{previously allocated by thread T0 here:}}
29
30  // CHECK-Linux: {{    #0 0x.* in .*malloc}}
31  // CHECK-Linux: {{    #1 0x.* in main .*use-after-free-right.cc:}}[[@LINE-19]]
32
33  // CHECK-Darwin: {{    #0 0x.* in wrap_malloc.*}}
34  // CHECK-Darwin: {{    #1 0x.* in main .*use-after-free-right.cc:}}[[@LINE-22]]
35}
36