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Message-Id: <944694879f67c0e635815ac57154be477a1b9108.1655368610.git.bristot@kernel.org>
Date: Thu, 16 Jun 2022 10:44:53 +0200
From: Daniel Bristot de Oliveira <bristot@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Guenter Roeck <linux@...ck-us.net>,
Jonathan Corbet <corbet@....net>,
Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>,
Will Deacon <will@...nel.org>,
Catalin Marinas <catalin.marinas@....com>,
Marco Elver <elver@...gle.com>,
Dmitry Vyukov <dvyukov@...gle.com>,
"Paul E. McKenney" <paulmck@...nel.org>,
Shuah Khan <skhan@...uxfoundation.org>,
Gabriele Paoloni <gpaoloni@...hat.com>,
Juri Lelli <juri.lelli@...hat.com>,
Clark Williams <williams@...hat.com>,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-trace-devel@...r.kernel.org
Subject: [PATCH V4 11/20] rv/monitor: wwnr instrumentation and Makefile/Kconfig entries
Adds the instrumentation to the previously created wwnr monitor, as an
example of the developer work. It also adds a Makefile, Kconfig and
tracepoint entries.
Cc: Wim Van Sebroeck <wim@...ux-watchdog.org>
Cc: Guenter Roeck <linux@...ck-us.net>
Cc: Jonathan Corbet <corbet@....net>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Will Deacon <will@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Marco Elver <elver@...gle.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Cc: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Shuah Khan <skhan@...uxfoundation.org>
Cc: Gabriele Paoloni <gpaoloni@...hat.com>
Cc: Juri Lelli <juri.lelli@...hat.com>
Cc: Clark Williams <williams@...hat.com>
Cc: linux-doc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-trace-devel@...r.kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@...nel.org>
---
include/trace/events/rv.h | 12 +++++++++
kernel/trace/rv/Kconfig | 8 ++++++
kernel/trace/rv/Makefile | 1 +
kernel/trace/rv/monitors/wwnr/wwnr.c | 38 ++++++++++++----------------
4 files changed, 37 insertions(+), 22 deletions(-)
diff --git a/include/trace/events/rv.h b/include/trace/events/rv.h
index 4e0dabffcf29..00f11a8dac3b 100644
--- a/include/trace/events/rv.h
+++ b/include/trace/events/rv.h
@@ -122,6 +122,18 @@ DECLARE_EVENT_CLASS(error_da_monitor_id,
__entry->event,
__entry->state)
);
+
+#ifdef CONFIG_RV_MON_WWNR
+/* id is the pid of the task */
+DEFINE_EVENT(event_da_monitor_id, event_wwnr,
+ TP_PROTO(int id, char *state, char *event, char *next_state, bool safe),
+ TP_ARGS(id, state, event, next_state, safe));
+
+DEFINE_EVENT(error_da_monitor_id, error_wwnr,
+ TP_PROTO(int id, char *state, char *event),
+ TP_ARGS(id, state, event));
+#endif /* CONFIG_RV_MON_WWNR */
+
#endif /* CONFIG_DA_MON_EVENTS_ID */
#endif /* _TRACE_RV_H */
diff --git a/kernel/trace/rv/Kconfig b/kernel/trace/rv/Kconfig
index e9246b0bec9d..fba2ace2a22b 100644
--- a/kernel/trace/rv/Kconfig
+++ b/kernel/trace/rv/Kconfig
@@ -34,6 +34,14 @@ config RV_MON_WIP
Enable WIP sample monitor, this is a sample monitor that
illustrates the usage of per-cpu monitors.
+config RV_MON_WWNR
+ select DA_MON_EVENTS_ID
+ bool "WWNR monitor"
+ help
+ Enable WWNR sample monitor, this is a sample monitor that
+ illustrates the usage of per-task monitor. The model is
+ broken on purpose: it serves to test reactors.
+
config RV_REACTORS
bool "Runtime verification reactors"
default y if RV
diff --git a/kernel/trace/rv/Makefile b/kernel/trace/rv/Makefile
index b41109d2750a..af0ff9a46418 100644
--- a/kernel/trace/rv/Makefile
+++ b/kernel/trace/rv/Makefile
@@ -3,3 +3,4 @@
obj-$(CONFIG_RV) += rv.o
obj-$(CONFIG_RV_REACTORS) += rv_reactors.o
obj-$(CONFIG_RV_MON_WIP) += monitors/wip/wip.o
+obj-$(CONFIG_RV_MON_WWNR) += monitors/wwnr/wwnr.o
diff --git a/kernel/trace/rv/monitors/wwnr/wwnr.c b/kernel/trace/rv/monitors/wwnr/wwnr.c
index 8ba01f0f0df8..3fe1ad9125d3 100644
--- a/kernel/trace/rv/monitors/wwnr/wwnr.c
+++ b/kernel/trace/rv/monitors/wwnr/wwnr.c
@@ -10,11 +10,8 @@
#define MODULE_NAME "wwnr"
-/*
- * XXX: include required tracepoint headers, e.g.,
- * #include <linux/trace/events/sched.h>
- */
#include <trace/events/rv.h>
+#include <trace/events/sched.h>
/*
* This is the self-generated part of the monitor. Generally, there is no need
@@ -37,21 +34,20 @@ DECLARE_DA_MON_PER_TASK(wwnr, char);
* are translated into model's event.
*
*/
-static void handle_switch_in(void *data, /* XXX: fill header */)
+static void handle_switch(void *data, bool preempt, struct task_struct *p,
+ struct task_struct *n, unsigned int prev_state)
{
- struct task_struct *p = /* XXX: how do I get p? */;
- da_handle_event_wwnr(p, switch_in_wwnr);
-}
+ /* start monitoring only after the first suspension */
+ if (prev_state == TASK_INTERRUPTIBLE)
+ da_handle_init_event_wwnr(p, switch_out_wwnr);
+ else
+ da_handle_event_wwnr(p, switch_out_wwnr);
-static void handle_switch_out(void *data, /* XXX: fill header */)
-{
- struct task_struct *p = /* XXX: how do I get p? */;
- da_handle_event_wwnr(p, switch_out_wwnr);
+ da_handle_event_wwnr(n, switch_in_wwnr);
}
-static void handle_wakeup(void *data, /* XXX: fill header */)
+static void handle_wakeup(void *data, struct task_struct *p)
{
- struct task_struct *p = /* XXX: how do I get p? */;
da_handle_event_wwnr(p, wakeup_wwnr);
}
@@ -63,9 +59,8 @@ static int start_wwnr(void)
if (retval)
return retval;
- rv_attach_trace_probe("wwnr", /* XXX: tracepoint */, handle_switch_in);
- rv_attach_trace_probe("wwnr", /* XXX: tracepoint */, handle_switch_out);
- rv_attach_trace_probe("wwnr", /* XXX: tracepoint */, handle_wakeup);
+ rv_attach_trace_probe("wwnr", sched_switch, handle_switch);
+ rv_attach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
return 0;
}
@@ -74,9 +69,8 @@ static void stop_wwnr(void)
{
rv_wwnr.enabled = 0;
- rv_detach_trace_probe("wwnr", /* XXX: tracepoint */, handle_switch_in);
- rv_detach_trace_probe("wwnr", /* XXX: tracepoint */, handle_switch_out);
- rv_detach_trace_probe("wwnr", /* XXX: tracepoint */, handle_wakeup);
+ rv_detach_trace_probe("wwnr", sched_switch, handle_switch);
+ rv_detach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
da_monitor_destroy_wwnr();
}
@@ -111,5 +105,5 @@ module_init(register_wwnr);
module_exit(unregister_wwnr);
MODULE_LICENSE("GPL");
-MODULE_AUTHOR("dot2k: auto-generated");
-MODULE_DESCRIPTION("wwnr");
+MODULE_AUTHOR("Daniel Bristot de Oliveira <bristot@...nel.org>");
+MODULE_DESCRIPTION("wwnr: wakeup while not running monitor.");
--
2.35.1
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