1// REQUIRES: gwp_asan
2// RUN: %clang_gwp_asan %s -g -o %t
3// RUN: %expect_crash %t 2>&1 | FileCheck %s
4
5#include <stdlib.h>
6
7__attribute__((noinline)) void *allocate_mem() { return malloc(1); }
8
9__attribute__((noinline)) void free_mem(void *ptr) { free(ptr); }
10
11__attribute__((noinline)) void touch_mem(void *ptr) {
12 volatile char sink = *((volatile char *)ptr);
13}
14
15// CHECK: Use After Free
16// CHECK: touch_mem
17// CHECK: was deallocated
18// CHECK: free_mem
19// CHECK: was allocated
20// CHECK: allocate_mem
21
22int main() {
23 for (unsigned i = 0; i < 0x10000; ++i) {
24 void *ptr = allocate_mem();
25 free_mem(ptr);
26 touch_mem(ptr);
27 }
28 return 0;
29}
30