clang/gccでメモリチェック

#include <iostream>

int main() {
  int* p1 = new int(1);
  int* p2 = p1;
  std::cout << *p1 << std::endl;
  delete p1;
  std::cout << *p2 << std::endl;  // 解放メモリアクセス違反

  int* p3 = new int[10];
  std::cout << p3[5] << std::endl;  // 未初期化メモリアクセス

  int* p4 = new int(5);  // メモリ解放忘れ

  return 0;
}

% clang++ clang_memory_sanitizer.cc
% ./a.out
1
14686864
3

% clang++ -fsanitize=address clang_memory_sanitizer.cc
% ./a.out
1
==3610==ERROR: AddressSanitizer: heap-use-after-free on address ...