adress sanitizer no output with ctrl c

Suppose you have the following code, which has a clear memory leak, and you build it with adress sanitizer, if you hit ctrl-c you won't get any output from it, we'll explore why and how to fix this situation.

  
#include 

int main() {
    malloc(100);
    while (true) {
    }
}

  

The reason you don't see AddressSanitizer (ASan) reports when you terminate the program with Ctrl+C is that ASan reports memory leaks only when the program exits normally. When you send a SIGINT (Ctrl+C), the program terminates abruptly, and ASan doesn't get a chance to run its leak detection. We can fix this by handling the interrupt signal with a signal handler to exit gracefully, thus seeing the asan results:

  
#include 
#include 
#include 

void handle_signal(int) {
    std::exit(1);  // Clean exit triggers ASan
}

int main() {
    malloc(100);  // Memory leak
    std::signal(SIGINT, handle_signal);  // Handle Ctrl+C
    while (true) {}  // Infinite loop
}