1 | // Checks that the ASan debugging API for getting report information |
2 | // returns correct values. |
3 | // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
4 | |
5 | #include <sanitizer/asan_interface.h> |
6 | #include <stdio.h> |
7 | #include <stdlib.h> |
8 | |
9 | int main() { |
10 | // Disable stderr buffering. Needed on Windows. |
11 | setvbuf(stderr, NULL, _IONBF, n: 0); |
12 | |
13 | char *heap_ptr = (char *)malloc(size: 10); |
14 | free(ptr: heap_ptr); |
15 | int present = __asan_report_present(); |
16 | fprintf(stderr, format: "%s\n" , (present == 0) ? "no report" : "" ); |
17 | // CHECK: no report |
18 | heap_ptr[0] = 'A'; // BOOM |
19 | return 0; |
20 | } |
21 | |
22 | // If we use %p with MS CRTs, it comes out all upper case. Use %08x to get |
23 | // lowercase hex. |
24 | #ifdef _WIN32 |
25 | # ifdef _WIN64 |
26 | # define PTR_FMT "0x%08llx" |
27 | # else |
28 | # define PTR_FMT "0x%08x" |
29 | # endif |
30 | // Solaris libc omits the leading 0x. |
31 | #elif defined(__sun__) && defined(__svr4__) |
32 | # define PTR_FMT "0x%p" |
33 | #else |
34 | # define PTR_FMT "%p" |
35 | #endif |
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 *pc = __asan_get_report_pc(); |
45 | void *bp = __asan_get_report_bp(); |
46 | void *sp = __asan_get_report_sp(); |
47 | void *addr = __asan_get_report_address(); |
48 | int is_write = __asan_get_report_access_type(); |
49 | size_t access_size = __asan_get_report_access_size(); |
50 | const char *description = __asan_get_report_description(); |
51 | |
52 | fprintf(stderr, format: "%s\n" , (present == 1) ? "report" : "" ); |
53 | // CHECK: report |
54 | fprintf(stderr, format: "pc: " PTR_FMT "\n" , pc); |
55 | // CHECK: pc: 0x[[PC:[0-9a-f]+]] |
56 | fprintf(stderr, format: "bp: " PTR_FMT "\n" , bp); |
57 | // CHECK: bp: 0x[[BP:[0-9a-f]+]] |
58 | fprintf(stderr, format: "sp: " PTR_FMT "\n" , sp); |
59 | // CHECK: sp: 0x[[SP:[0-9a-f]+]] |
60 | fprintf(stderr, format: "addr: " PTR_FMT "\n" , addr); |
61 | // CHECK: addr: 0x[[ADDR:[0-9a-f]+]] |
62 | fprintf(stderr, format: "type: %s\n" , (is_write ? "write" : "read" )); |
63 | // CHECK: type: write |
64 | fprintf(stderr, format: "access_size: %ld\n" , access_size); |
65 | // CHECK: access_size: 1 |
66 | fprintf(stderr, format: "description: %s\n" , description); |
67 | // CHECK: description: heap-use-after-free |
68 | } |
69 | |
70 | // CHECK: AddressSanitizer: heap-use-after-free on address {{0x0*}}[[ADDR]] at pc {{0x0*}}[[PC]] bp {{0x0*}}[[BP]] sp {{0x0*}}[[SP]] |
71 | // CHECK: WRITE of size 1 at {{0x0*}}[[ADDR]] thread T0 |
72 | |