profile.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

/*
 *	linux/arch/i386/kernel/profile.c
 *
 *	(C) 2002 John Levon <[e-mail]>
 *
 */

#include <linux/config.h>
#include <linux/sched.h>
#include <linux/profile.h>
#include <linux/spinlock.h>
#include <linux/notifier.h>
#include <asm/smp.h>
#include <linux/irq.h>
 
static struct notifier_block * profile_listeners;
static rwlock_t profile_lock = RW_LOCK_UNLOCKED;
 
int register_profile_notifier(struct notifier_block * nb)
{
	int err;
	write_lock_irq(&profile_lock);
	err = notifier_chain_register(&profile_listeners, nb);
	write_unlock_irq(&profile_lock);
	return err;
}


int unregister_profile_notifier(struct notifier_block * nb)
{
	int err;
	write_lock_irq(&profile_lock);
	err = notifier_chain_unregister(&profile_listeners, nb);
	write_unlock_irq(&profile_lock);
	return err;
}


void x86_profile_hook(struct pt_regs * regs)
{
	/* we would not even need this lock if
	 * we had a global cli() on register/unregister
	 */ 
	read_lock(&profile_lock);
	notifier_call_chain(&profile_listeners, 0, regs);
	read_unlock(&profile_lock);
}