/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * This source file is part of SableVM.                            *
 *                                                                 *
 * See the file "LICENSE" for the copyright information and for    *
 * the terms and conditions for copying, distribution and          *
 * modification of this source file.                               *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#define SA_SIGONFAULT	0x00000008u

static volatile u_int64_t page_faults = 0;

svm_static void
pagefault_handler(int signo, siginfo_t *info, void *dummy)
{
	page_faults++;
}

svm_static jint
_svmf_stats_init (void)
{
	struct sigaction sa;

	memset(&sa, 0, sizeof(struct sigaction));

	sa.sa_sigaction = pagefault_handler;
	sa.sa_flags = SA_SIGINFO | SA_SIGONFAULT;

	if (sigaction(SIGRTMIN+10, &sa, 0) != 0)
		return JNI_ERR;

	return JNI_OK;
}

svm_static u_int64_t
_svmf_stats_get_pagefaults (void)
{
	return page_faults;
}