| 1 | // Checks that the ASan debugging API for getting report information |
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| 2 | // returns correct values. |
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| 3 | // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 4 | |
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| 5 | #include <sanitizer/asan_interface.h> |
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| 6 | #include <stdio.h> |
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| 7 | #include <stdlib.h> |
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| 8 | |
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| 9 | int main() { |
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| 10 | // Disable stderr buffering. Needed on Windows. |
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| 11 | setvbuf(stderr, NULL, _IONBF, n: 0); |
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| 12 | |
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| 13 | char *heap_ptr = (char *)malloc(size: 10); |
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| 14 | free(ptr: heap_ptr); |
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| 15 | int present = __asan_report_present(); |
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| 16 | fprintf(stderr, format: "%s\n" , (present == 0) ? "no report" : "" ); |
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| 17 | // CHECK: no report |
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| 18 | heap_ptr[0] = 'A'; // BOOM |
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| 19 | return 0; |
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| 20 | } |
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| 21 | |
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| 22 | // If we use %p with MS CRTs, it comes out all upper case. Use %08x to get |
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| 23 | // lowercase hex. |
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| 24 | #ifdef _WIN32 |
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| 25 | # ifdef _WIN64 |
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| 26 | # define PTR_FMT "0x%08llx" |
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| 27 | # else |
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| 28 | # define PTR_FMT "0x%08x" |
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| 29 | # endif |
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| 30 | // Solaris libc omits the leading 0x. |
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| 31 | #elif defined(__sun__) && defined(__svr4__) |
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| 32 | # define PTR_FMT "0x%p" |
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| 33 | #else |
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| 34 | # define PTR_FMT "%p" |
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| 35 | #endif |
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| 36 | |
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| 37 | // Required for dyld macOS 12.0+ |
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| 38 | #if (__APPLE__) |
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| 39 | __attribute__((weak)) |
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| 40 | #endif |
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| 41 | extern "C" void |
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| 42 | __asan_on_error() { |
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| 43 | int present = __asan_report_present(); |
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| 44 | void *pc = __asan_get_report_pc(); |
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| 45 | void *bp = __asan_get_report_bp(); |
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| 46 | void *sp = __asan_get_report_sp(); |
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| 47 | void *addr = __asan_get_report_address(); |
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| 48 | int is_write = __asan_get_report_access_type(); |
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| 49 | size_t access_size = __asan_get_report_access_size(); |
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| 50 | const char *description = __asan_get_report_description(); |
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| 51 | |
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| 52 | fprintf(stderr, format: "%s\n" , (present == 1) ? "report" : "" ); |
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| 53 | // CHECK: report |
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| 54 | fprintf(stderr, format: "pc: " PTR_FMT "\n" , pc); |
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| 55 | // CHECK: pc: 0x[[PC:[0-9a-f]+]] |
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| 56 | fprintf(stderr, format: "bp: " PTR_FMT "\n" , bp); |
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| 57 | // CHECK: bp: 0x[[BP:[0-9a-f]+]] |
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| 58 | fprintf(stderr, format: "sp: " PTR_FMT "\n" , sp); |
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| 59 | // CHECK: sp: 0x[[SP:[0-9a-f]+]] |
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| 60 | fprintf(stderr, format: "addr: " PTR_FMT "\n" , addr); |
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| 61 | // CHECK: addr: 0x[[ADDR:[0-9a-f]+]] |
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| 62 | fprintf(stderr, format: "type: %s\n" , (is_write ? "write" : "read" )); |
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| 63 | // CHECK: type: write |
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| 64 | fprintf(stderr, format: "access_size: %ld\n" , access_size); |
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| 65 | // CHECK: access_size: 1 |
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| 66 | fprintf(stderr, format: "description: %s\n" , description); |
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| 67 | // CHECK: description: heap-use-after-free |
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| 68 | } |
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| 69 | |
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| 70 | // CHECK: AddressSanitizer: heap-use-after-free on address {{0x0*}}[[ADDR]] at pc {{0x0*}}[[PC]] bp {{0x0*}}[[BP]] sp {{0x0*}}[[SP]] |
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| 71 | // CHECK: WRITE of size 1 at {{0x0*}}[[ADDR]] thread T0 |
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| 72 | |
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