package main

/*
#define _GNU_SOURCE
#include <signal.h>
#include <stdbool.h>

// fixSigsegvOnStack adds SA_ONSTACK to the current SIGSEGV handler.
// Go 1.24+ requires all signal handlers to have SA_ONSTACK set,
// but WebKit/JavaScriptCore installs a SIGSEGV handler without it.
void fixSigsegvOnStack(void) {
	struct sigaction act;
	if (sigaction(SIGSEGV, NULL, &act) == 0) {
		if (!(act.sa_flags & SA_ONSTACK)) {
			act.sa_flags |= SA_ONSTACK;
			sigaction(SIGSEGV, &act, NULL);
		}
	}
}
*/
import "C"

import "time"

// ensureSignalOnStack periodically ensures SIGSEGV handler has SA_ONSTACK.
// This is needed because WebKit/JavaScriptCore installs a SIGSEGV handler
// without SA_ONSTACK, which causes Go 1.24+ to crash with:
//   "non-Go code set up signal handler without SA_ONSTACK flag"
func ensureSignalOnStack() {
	// Apply once after a short delay to let WebKit initialize
	go func() {
		// Retry a few times since WebKit may re-install its handler
		for i := 0; i < 10; i++ {
			time.Sleep(200 * time.Millisecond)
			C.fixSigsegvOnStack()
		}
	}()
}