compiler-rt/test/hwasan/TestCases/report-unmapped.cpp

   1 // RUN: %clangxx_hwasan %s -o %t && not %run %t 2>&1 | FileCheck %s
   2
   3 #include <sanitizer/hwasan_interface.h>
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <sys/mman.h>
   8 #include <unistd.h>
   9
  10 int main(int argc, char **argv) {
  11   const size_t kPS = sysconf(_SC_PAGESIZE);
  12
  13   void *r = nullptr;
  14   int res = posix_memalign(&r, kPS, 2 * kPS);
  15   if (res) {
  16     perror("Failed to mmap: ");
  17     abort();
  18   }
  19
  20   r = __hwasan_tag_pointer(r, 0);
  21   __hwasan_tag_memory(r, 1,  2 * kPS);
  22
  23   // Disable access to the page just after tag-mismatch report address.
  24   res = mprotect((char*)r + kPS, kPS, PROT_NONE);
  25   if (res) {
  26     perror("Failed to mprotect: ");
  27     abort();
  28   }
  29
  30   // Trigger tag-mismatch report.
  31   return *((char*)r + kPS - 1);
  32 }
  33
  34 // CHECK: ERROR: HWAddressSanitizer: tag-mismatch on address
  35 // CHECK: Memory tags around the buggy address
  36 // CHECK: Tags for short granules around
  37
  38 // Check that report is complete.
  39 // CHECK: SUMMARY: HWAddressSanitizer: tag-mismatch {{.*}} in main