Small program demonstrates use of ASan for detecting leaks.

asan-test.cpp

#include <iostream>
#include <stdlib.h>

#include <sanitizer/lsan_interface.h>

/**
 * clang++ -g -fsanitize=address asantest.cpp
 * ASAN_OPTIONS=detect_leaks=1 ./a.out
 *
 *  ASAN_OPTIONS=symbolize=1 ASAN_SYMBOLIZER_PATH=/usr/bin/llvm-symbolizer
 * ./a.out
 */

class Test1 {
  public:
    int i;
    Test1(int i) : i(i) {}
    ~Test1() {
      std::cout << "~Test1()" << std::endl;
    }
};

#define NOINLINE __attribute__((noinline))
void run() {
  Test1* t = new Test1(123);
  t = nullptr;
  //void* mem = malloc(300);
  //mem = 0;
  std::cout << "Leaving run() ..." << std::endl;
};

int main(int argc, char **argv) {
  std::cout << "Running..." << std::endl;

  int stack_array[100];
  stack_array[1] = 0;
  int val = 0; //stack_array[argc + 100];

  run();

  __lsan_do_leak_check();

  return val;
}