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
9int 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
41extern "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

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source code of compiler-rt/test/asan/TestCases/debug_report.cpp