1*673dc3d4SNico Weber // RUN: %clang_cl_asan -Od %s -Fe%t
2*673dc3d4SNico Weber // RUN: not %run %t 2>&1 | FileCheck %s
3*673dc3d4SNico Weber 
4*673dc3d4SNico Weber #include <malloc.h>
5*673dc3d4SNico Weber 
main()6*673dc3d4SNico Weber int main() {
7*673dc3d4SNico Weber   char *buffer = (char*)malloc(42);
8*673dc3d4SNico Weber   free(buffer);
9*673dc3d4SNico Weber   buffer[0] = 42;
10*673dc3d4SNico Weber // CHECK: AddressSanitizer: heap-use-after-free on address [[ADDR:0x[0-9a-f]+]]
11*673dc3d4SNico Weber // CHECK: WRITE of size 1 at [[ADDR]] thread T0
12*673dc3d4SNico Weber // CHECK-NEXT: {{#0 .* main .*malloc_uaf.cpp}}:[[@LINE-3]]
13*673dc3d4SNico Weber // CHECK: [[ADDR]] is located 0 bytes inside of 42-byte region
14*673dc3d4SNico Weber // CHECK: freed by thread T0 here:
15*673dc3d4SNico Weber // CHECK-NEXT: {{#0 .* free }}
16*673dc3d4SNico Weber // CHECK-NEXT: {{#1 .* main .*malloc_uaf.cpp}}:[[@LINE-8]]
17*673dc3d4SNico Weber // CHECK: previously allocated by thread T0 here:
18*673dc3d4SNico Weber // CHECK-NEXT: {{#0 .* malloc }}
19*673dc3d4SNico Weber // CHECK-NEXT: {{#1 .* main .*malloc_uaf.cpp}}:[[@LINE-12]]
20*673dc3d4SNico Weber }
21