Quelle  wip.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include <linux/ftrace.h>
#include <linux/tracepoint.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/rv.h>
#include <rv/instrumentation.h>
#include <rv/da_monitor.h>

#define MODULE_NAME "wip"

#include <rv_trace.h>
#include <trace/events/sched.h>
#include <trace/events/preemptirq.h>

#include "wip.h"

static struct rv_monitor rv_wip;
DECLARE_DA_MON_PER_CPU(wip, unsigned char);

static void handle_preempt_disable(void *data, unsigned long ip, unsigned long parent_ip)
{
 da_handle_event_wip(preempt_disable_wip);
}

static void handle_preempt_enable(void *data, unsigned long ip, unsigned long parent_ip)
{
 da_handle_start_event_wip(preempt_enable_wip);
}

static void handle_sched_waking(void *data, struct task_struct *task)
{
 da_handle_event_wip(sched_waking_wip);
}

static int enable_wip(void)
{
 int retval;

 retval = da_monitor_init_wip();
 if (retval)
  return retval;

 rv_attach_trace_probe("wip", preempt_enable, handle_preempt_enable);
 rv_attach_trace_probe("wip", sched_waking, handle_sched_waking);
 rv_attach_trace_probe("wip", preempt_disable, handle_preempt_disable);

 return 0;
}

static void disable_wip(void)
{
 rv_wip.enabled = 0;

 rv_detach_trace_probe("wip", preempt_disable, handle_preempt_disable);
 rv_detach_trace_probe("wip", preempt_enable, handle_preempt_enable);
 rv_detach_trace_probe("wip", sched_waking, handle_sched_waking);

 da_monitor_destroy_wip();
}

static struct rv_monitor rv_wip = {
 .name = "wip",
 .description = "wakeup in preemptive per-cpu testing monitor.",
 .enable = enable_wip,
 .disable = disable_wip,
 .reset = da_monitor_reset_all_wip,
 .enabled = 0,
};

static int __init register_wip(void)
{
 return rv_register_monitor(&rv_wip, NULL);
}

static void __exit unregister_wip(void)
{
 rv_unregister_monitor(&rv_wip);
}

module_init(register_wip);
module_exit(unregister_wip);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Daniel Bristot de Oliveira ");
MODULE_DESCRIPTION("wip: wakeup in preemptive - per-cpu sample monitor.");