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, 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 report 18 heap_ptr[0] = 'A'; // BOOM 19 return 0; 20 } 21 22 // If we use %p with MSVC, it comes out all upper case. Use %08x to get 23 // lowercase hex. 24 #ifdef _MSC_VER 25 # ifdef _WIN64 26 # define PTR_FMT "0x%08llx" 27 # else 28 # define PTR_FMT "0x%08x" 29 # endif 30 #else 31 # define PTR_FMT "%p" 32 #endif 33 34 void __asan_on_error() { 35 int present = __asan_report_present(); 36 void *pc = __asan_get_report_pc(); 37 void *bp = __asan_get_report_bp(); 38 void *sp = __asan_get_report_sp(); 39 void *addr = __asan_get_report_address(); 40 int is_write = __asan_get_report_access_type(); 41 size_t access_size = __asan_get_report_access_size(); 42 const char *description = __asan_get_report_description(); 43 44 fprintf(stderr, "%s\n", (present == 1) ? "report" : ""); 45 // CHECK: report 46 fprintf(stderr, "pc: " PTR_FMT "\n", pc); 47 // CHECK: pc: 0x[[PC:[0-9a-f]+]] 48 fprintf(stderr, "bp: " PTR_FMT "\n", bp); 49 // CHECK: bp: 0x[[BP:[0-9a-f]+]] 50 fprintf(stderr, "sp: " PTR_FMT "\n", sp); 51 // CHECK: sp: 0x[[SP:[0-9a-f]+]] 52 fprintf(stderr, "addr: " PTR_FMT "\n", addr); 53 // CHECK: addr: 0x[[ADDR:[0-9a-f]+]] 54 fprintf(stderr, "type: %s\n", (is_write ? "write" : "read")); 55 // CHECK: type: write 56 fprintf(stderr, "access_size: %ld\n", access_size); 57 // CHECK: access_size: 1 58 fprintf(stderr, "description: %s\n", description); 59 // CHECK: description: heap-use-after-free 60 } 61 62 // CHECK: AddressSanitizer: heap-use-after-free on address {{0x0*}}[[ADDR]] at pc {{0x0*}}[[PC]] bp {{0x0*}}[[BP]] sp {{0x0*}}[[SP]] 63 // CHECK: WRITE of size 1 at {{0x0*}}[[ADDR]] thread T0 64
