[lttv.git] / trunk / tests / markers / probe.c

/* probe.c
 *
 * Loads a function at a marker call site.
 *
 * (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
 *
 * This file is released under the GPLv2.
 * See the file COPYING for more details.
 */

#include <linux/marker.h>
#include <linux/module.h>
#include <linux/kallsyms.h>

/* function to install */
#define DO_MARK1_FORMAT "%d %p"
void do_mark1(const char *format, ...)
{
#if 0
	va_list ap;
	int value;

	va_start(ap, format);
	value = va_arg(ap, int);
	printk("value is %d\n", value);
	
	va_end(ap);
#endif //0
}

int init_module(void)
{
	int result;
	result = marker_set_probe("subsys_mark1", DO_MARK1_FORMAT,
			(marker_probe_func*)do_mark1);
	if(!result) goto end;

	return 0;

end:
	marker_remove_probe(do_mark1);
	return -EPERM;
}

void cleanup_module(void)
{
	marker_remove_probe(do_mark1);
}

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mathieu Desnoyers");
MODULE_DESCRIPTION("Probe");
Commit	Line	Data
bc82195a	1	/* probe.c
	2	*
	3	* Loads a function at a marker call site.
	4	*
	5	* (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
	6	*
	7	* This file is released under the GPLv2.
	8	* See the file COPYING for more details.
	9	*/
	10
	11	#include <linux/marker.h>
	12	#include <linux/module.h>
	13	#include <linux/kallsyms.h>
	14
	15	/* function to install */
	16	#define DO_MARK1_FORMAT "%d %p"
	17	void do_mark1(const char *format, ...)
	18	{
	19	#if 0
	20	va_list ap;
	21	int value;
	22
	23	va_start(ap, format);
	24	value = va_arg(ap, int);
	25	printk("value is %d\n", value);
	26
	27	va_end(ap);
	28	#endif //0
	29	}
	30
	31	int init_module(void)
	32	{
	33	int result;
	34	result = marker_set_probe("subsys_mark1", DO_MARK1_FORMAT,
	35	(marker_probe_func*)do_mark1);
	36	if(!result) goto end;
	37
	38	return 0;
	39
	40	end:
	41	marker_remove_probe(do_mark1);
	42	return -EPERM;
	43	}
	44
	45	void cleanup_module(void)
	46	{
	47	marker_remove_probe(do_mark1);
	48	}
	49
	50	MODULE_LICENSE("GPL");
	51	MODULE_AUTHOR("Mathieu Desnoyers");
	52	MODULE_DESCRIPTION("Probe");