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