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.
(none).
(none).
(none).
POSIX specifies that the abort() function overrides blocking or ignoring the SIGABRT signal.
#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
| causes normal program termination with cleaning up (function) |
|
registers a function to be called on std::exit() invocation (function) |
|
|
(C++11) | causes quick program termination without completely cleaning up (function) |
|
(C++11) | registers a function to be called on quick_exit invocation (function) |
| sets a signal handler for particular signal (function) |
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