compiler-rt/test/asan/TestCases/debug_report.cpp

   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 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
  41 extern "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, "%s\n", (present == 1) ? "report" : "");
  53   // CHECK: report
  54   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: write
  64   fprintf(stderr, "access_size: %ld\n", access_size);
  65   // CHECK: access_size: 1
  66   fprintf(stderr, "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