compiler-rt/test/hwasan/TestCases/tag-ptr.cpp

   1 // RUN: %clangxx_hwasan -O0 %s -o %t && %run %t
   2
   3 #include <assert.h>
   4 #include <memory>
   5 #include <sanitizer/hwasan_interface.h>
   6 #include <set>
   7 #include <stdio.h>
   8
   9 int main() {
  10   auto p = std::make_unique<char>();
  11   std::set<void *> ptrs;
  12   for (unsigned i = 0;; ++i) {
  13     void *ptr = __hwasan_tag_pointer(p.get(), i);
  14     if (!ptrs.insert(ptr).second)
  15       break;
  16     fprintf(stderr, "%p, %u, %u\n", ptr, i, __hwasan_get_tag_from_pointer(ptr));
  17     assert(__hwasan_get_tag_from_pointer(ptr) == i);
  18   }
  19 #ifdef __x86_64__
  20   assert(ptrs.size() == 8 || ptrs.size() == 64);
  21 #else
  22   assert(ptrs.size() == 256);
  23 #endif
  24 }