compiler-rt/test/hwasan/TestCases/realloc-after-free.c

   1 // RUN: %clang_hwasan %s -o %t
   2 // RUN: not %run %t 50 2>&1 | FileCheck %s
   3 // RUN: not %run %t 40 2>&1 | FileCheck %s
   4 // RUN: not %run %t 30 2>&1 | FileCheck %s
   5
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <sanitizer/hwasan_interface.h>
   9
  10 int main(int argc, char **argv) {
  11   __hwasan_enable_allocator_tagging();
  12   if (argc != 2) return 0;
  13   int realloc_size = atoi(argv[1]);
  14   char * volatile x = (char*)malloc(40);
  15   free(x);
  16   x = realloc(x, realloc_size);
  17   // CHECK: ERROR: HWAddressSanitizer: invalid-free on address
  18   // CHECK: tags: [[PTR_TAG:..]]/[[MEM_TAG:..]] (ptr/mem)
  19   // CHECK: freed by thread {{.*}} here:
  20   // CHECK: previously allocated by thread {{.*}} here:
  21   // CHECK: Memory tags around the buggy address (one tag corresponds to 16 bytes):
  22   // CHECK: =>{{.*}}[[MEM_TAG]]
  23   fprintf(stderr, "DONE\n");
  24   __hwasan_disable_allocator_tagging();
  25 // CHECK-NOT: DONE
  26 }