1 | // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
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2 | |
3 | #include <sanitizer/asan_interface.h> |
4 | #include <stdio.h> |
5 | #include <stdlib.h> |
6 | |
7 | // If we use %p with MS CRTs, it comes out all upper case. Use %08x to get |
8 | // lowercase hex. |
9 | #ifdef _WIN32 |
10 | # ifdef _WIN64 |
11 | # define PTR_FMT "0x%08llx" |
12 | # else |
13 | # define PTR_FMT "0x%08x" |
14 | # endif |
15 | // Solaris libc omits the leading 0x. |
16 | #elif defined(__sun__) && defined(__svr4__) |
17 | # define PTR_FMT "0x%p" |
18 | #else |
19 | # define PTR_FMT "%p" |
20 | #endif |
21 | |
22 | char *heap_ptr; |
23 | |
24 | int main() { |
25 | // Disable stderr buffering. Needed on Windows. |
26 | setvbuf(stderr, NULL, _IONBF, n: 0); |
27 | |
28 | heap_ptr = (char *)malloc(size: 10); |
29 | fprintf(stderr, format: "heap_ptr: "PTR_FMT "\n", heap_ptr); |
30 | // CHECK: heap_ptr: 0x[[ADDR:[0-9a-f]+]] |
31 | |
32 | free(ptr: heap_ptr); |
33 | free(ptr: heap_ptr); // BOOM |
34 | return 0; |
35 | } |
36 | |
37 | // Required for dyld macOS 12.0+ |
38 | #if (__APPLE__) |
39 | __attribute__((weak)) |
40 | #endif |
41 | extern "C"void |
42 | __asan_on_error() { |
43 | int present = __asan_report_present(); |
44 | void *addr = __asan_get_report_address(); |
45 | const char *description = __asan_get_report_description(); |
46 | |
47 | fprintf(stderr, format: "%s\n", (present == 1) ? "report present": ""); |
48 | // CHECK: report present |
49 | fprintf(stderr, format: "addr: "PTR_FMT "\n", addr); |
50 | // CHECK: addr: {{0x0*}}[[ADDR]] |
51 | fprintf(stderr, format: "description: %s\n", description); |
52 | // CHECK: description: double-free |
53 | } |
54 | |
55 | // CHECK: AddressSanitizer: attempting double-free on {{0x0*}}[[ADDR]] in thread T0 |
56 |