std::abort (3) - Linux Manuals

std::abort: std::abort

NAME

std::abort - std::abort

Synopsis

Defined in header <cstdlib>
void abort(); (until C++11)
[[noreturn]] void abort() noexcept; (since C++11)

Causes abnormal program termination unless SIGABRT is being caught by a signal handler passed to std::signal and the handler does not return.
Destructors of variables with automatic,
thread local
(since C++11) and static storage_durations are not called. Functions registered with std::atexit()
and std::at_quick_exit
(since C++11) are also not called. Whether open resources such as files are closed is implementation defined. An implementation defined status is returned to the host environment that indicates unsuccessful execution.

Parameters

(none)

Return value

(none)

Exceptions

(none)

Notes

POSIX specifies that the abort() function overrides blocking or ignoring the SIGABRT signal.

Example

// Run this code

  #include <csignal>
  #include <iostream>
  #include <cstdlib>

  class Tester {
  public:
      Tester() { std::cout << "Tester ctor\n"; }
      ~Tester() { std::cout << "Tester dtor\n"; }
  };

  Tester static_tester; // Destructor not called

  void signal_handler(int signal)
  {
      if (signal == SIGABRT) {
          std::cerr << "SIGABRT received\n";
      } else {
          std::cerr << "Unexpected signal " << signal << " received\n";
      }
      std::_Exit(EXIT_FAILURE);
  }

  int main()
  {
      Tester automatic_tester; // Destructor not called

      // Setup handler
      auto previous_handler = std::signal(SIGABRT, signal_handler);
      if (previous_handler == SIG_ERR) {
          std::cerr << "Setup failed\n";
          return EXIT_FAILURE;
      }

      std::abort(); // Raise SIGABRT
      std::cout << "This code is unreachable\n";
  }

Output:

  Tester ctor
  Tester ctor
  SIGABRT received