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

   1 // Test max_redzone runtime option.
   2
   3 // RUN: %clangxx_asan -O0 %s -o %t && %env_asan_opts=max_redzone=32 %run %t 0 2>&1
   4 // RUN: %clangxx_asan -O0 %s -o %t && %run %t 1 2>&1
   5 // RUN: %clangxx_asan -O3 %s -o %t && %env_asan_opts=max_redzone=32 %run %t 0 2>&1
   6 // RUN: %clangxx_asan -O3 %s -o %t && %run %t 1 2>&1
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <stdint.h>
  11 #include <sanitizer/allocator_interface.h>
  12
  13 int main(int argc, char **argv) {
  14   if (argc < 2)
  15     return 1;
  16   bool large_redzone = atoi(argv[1]);
  17   size_t before = __sanitizer_get_heap_size();
  18   void *pp[10000];
  19   for (int i = 0; i < 10000; ++i)
  20     pp[i] = malloc(4096 - 64);
  21   size_t after = __sanitizer_get_heap_size();
  22   for (int i = 0; i < 10000; ++i)
  23     free(pp[i]);
  24   size_t diff = after - before;
  25   return !(large_redzone ? diff > 46000000 : diff < 46000000);
  26 }