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 // FIXME: Doesn't work with DLLs
10 // XFAIL: win32-dynamic-asan
11
main()12 int main() {
13 // Disable stderr buffering. Needed on Windows.
14 setvbuf(stderr, NULL, _IONBF, 0);
15
16 char *heap_ptr = (char *)malloc(10);
17 free(heap_ptr);
18 int present = __asan_report_present();
19 fprintf(stderr, "%s\n", (present == 0) ? "no report" : "");
20 // CHECK: no report
21 heap_ptr[0] = 'A'; // BOOM
22 return 0;
23 }
24
25 // If we use %p with MSVC, it comes out all upper case. Use %08x to get
26 // lowercase hex.
27 #ifdef _MSC_VER
28 # ifdef _WIN64
29 # define PTR_FMT "0x%08llx"
30 # else
31 # define PTR_FMT "0x%08x"
32 # endif
33 // Solaris libc omits the leading 0x.
34 #elif defined(__sun__) && defined(__svr4__)
35 # define PTR_FMT "0x%p"
36 #else
37 # define PTR_FMT "%p"
38 #endif
39
40 // Required for dyld macOS 12.0+
41 #if (__APPLE__)
42 __attribute__((weak))
43 #endif
44 extern "C" void
__asan_on_error()45 __asan_on_error() {
46 int present = __asan_report_present();
47 void *pc = __asan_get_report_pc();
48 void *bp = __asan_get_report_bp();
49 void *sp = __asan_get_report_sp();
50 void *addr = __asan_get_report_address();
51 int is_write = __asan_get_report_access_type();
52 size_t access_size = __asan_get_report_access_size();
53 const char *description = __asan_get_report_description();
54
55 fprintf(stderr, "%s\n", (present == 1) ? "report" : "");
56 // CHECK: report
57 fprintf(stderr, "pc: " PTR_FMT "\n", pc);
58 // CHECK: pc: 0x[[PC:[0-9a-f]+]]
59 fprintf(stderr, "bp: " PTR_FMT "\n", bp);
60 // CHECK: bp: 0x[[BP:[0-9a-f]+]]
61 fprintf(stderr, "sp: " PTR_FMT "\n", sp);
62 // CHECK: sp: 0x[[SP:[0-9a-f]+]]
63 fprintf(stderr, "addr: " PTR_FMT "\n", addr);
64 // CHECK: addr: 0x[[ADDR:[0-9a-f]+]]
65 fprintf(stderr, "type: %s\n", (is_write ? "write" : "read"));
66 // CHECK: type: write
67 fprintf(stderr, "access_size: %ld\n", access_size);
68 // CHECK: access_size: 1
69 fprintf(stderr, "description: %s\n", description);
70 // CHECK: description: heap-use-after-free
71 }
72
73 // CHECK: AddressSanitizer: heap-use-after-free on address {{0x0*}}[[ADDR]] at pc {{0x0*}}[[PC]] bp {{0x0*}}[[BP]] sp {{0x0*}}[[SP]]
74 // CHECK: WRITE of size 1 at {{0x0*}}[[ADDR]] thread T0
75