compiler-rt/test/sanitizer_common/TestCases/reallocarray-overflow.cpp

   1 // RUN: %clangxx  -O0 %s -o %t
   2 // RUN: %env_tool_opts=allocator_may_return_null=0 not %run %t 2>&1 | FileCheck %s
   3 // RUN: %env_tool_opts=allocator_may_return_null=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-NULL
   4
   5 // REQUIRES: stable-runtime && !ubsan && !darwin
   6
   7 #include <stdio.h>
   8
   9 extern "C" void *reallocarray(void *, size_t, size_t);
  10
  11 int main() {
  12   void *p = reallocarray(nullptr, -1, 1000);
  13   // CHECK: {{ERROR: .*Sanitizer: reallocarray parameters overflow: count \* size \(.* \* 1000\) cannot be represented in type size_t}}
  14
  15   printf("reallocarray returned: %zu\n", (size_t)p);
  16   // CHECK-NULL: reallocarray returned: 0
  17
  18   return 0;
  19 }