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std::abort

From cppreference.com
< cpp‎ | utility‎ | program

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

Causes abnormal program termination unless SIGABRT is being caught by a signal handler passed to signal and the handler does not return.

Destructors of variables with automatic, thread local and static storage durations are not called. Functions passed to std::atexit() are also not called. Whether open resources such as files are closed is implementation defined. Implementation defined status is returned to the host environment that indicates unsuccessful execution.

Contents

[edit] Parameters

(none)

[edit] Return value

(none)

[edit] Exceptions

(none) (until C++11)
noexcept specification:  
noexcept
  
(since C++11)

[edit] Example

#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

[edit] See also

causes normal program termination with cleaning up
(function) [edit]
registers a function to be called on std::exit() invocation
(function) [edit]
causes quick program termination without completely cleaning up
(function) [edit]
sets a signal handler for particular signal
(function) [edit]
C documentation for abort