compiler-rt/test/hwasan/TestCases/short-granule-disabled.cpp

   1 // RUN: %clangxx_hwasan %s -o %t && %run %t 2>&1
   2
   3 #include <sanitizer/hwasan_interface.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 // Regression test for https://reviews.llvm.org/D107938#2961070, where, on
   9 // reusing an allocation, we forgot to reset the short granule tag if the
  10 // allocator was disabled. This lead to a false positive magic-string mismatch.
  11
  12 int main() {
  13   void *p = malloc(16);
  14   memset(p, 0xff, 16);
  15   free(p);
  16
  17   // Relies on the LRU cache immediately recycling the allocation above.
  18   p = malloc(8);
  19   free(p); // Regression was here, in the magic-string check in the runtime.
  20   return 0;
  21 }