72 lines · cpp
1// Checks that the ASan debugging API for getting report information2// returns correct values.3// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s4 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, 0);12 13 char *heap_ptr = (char *)malloc(10);14 free(heap_ptr);15 int present = __asan_report_present();16 fprintf(stderr, "%s\n", (present == 0) ? "no report" : "");17 // CHECK: no report18 heap_ptr[0] = 'A'; // BOOM19 return 0;20}21 22// If we use %p with MS CRTs, it comes out all upper case. Use %08x to get23// lowercase hex.24#ifdef _WIN3225# ifdef _WIN6426# define PTR_FMT "0x%08llx"27# else28# define PTR_FMT "0x%08x"29# endif30// Solaris libc omits the leading 0x.31#elif defined(__sun__) && defined(__svr4__)32# define PTR_FMT "0x%p"33#else34# define PTR_FMT "%p"35#endif36 37// Required for dyld macOS 12.0+38#if (__APPLE__)39__attribute__((weak))40#endif41extern "C" void42__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, "%s\n", (present == 1) ? "report" : "");53 // CHECK: report54 fprintf(stderr, "pc: " PTR_FMT "\n", pc);55 // CHECK: pc: 0x[[PC:[0-9a-f]+]]56 fprintf(stderr, "bp: " PTR_FMT "\n", bp);57 // CHECK: bp: 0x[[BP:[0-9a-f]+]]58 fprintf(stderr, "sp: " PTR_FMT "\n", sp);59 // CHECK: sp: 0x[[SP:[0-9a-f]+]]60 fprintf(stderr, "addr: " PTR_FMT "\n", addr);61 // CHECK: addr: 0x[[ADDR:[0-9a-f]+]]62 fprintf(stderr, "type: %s\n", (is_write ? "write" : "read"));63 // CHECK: type: write64 fprintf(stderr, "access_size: %ld\n", access_size);65 // CHECK: access_size: 166 fprintf(stderr, "description: %s\n", description);67 // CHECK: description: heap-use-after-free68}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 T072