Resguardo inicial

linux-7.2.3/kernel/trace/rv/monitors/wwnr/Kconfig

@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+config RV_MON_WWNR
+	depends on RV
+	select DA_MON_EVENTS_ID
+	bool "wwnr monitor"
+	help
+	  Enable wwnr (wakeup while not running) sample monitor, this is a
+	  sample monitor that illustrates the usage of per-task monitor.
+	  The model is borken on purpose: it serves to test reactors.
+
+	  For further information, see:
+	    Documentation/trace/rv/monitor_wwnr.rst

linux-7.2.3/kernel/trace/rv/monitors/wwnr/wwnr.c

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+// 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>
+
+#define MODULE_NAME "wwnr"
+
+#include <rv_trace.h>
+#include <trace/events/sched.h>
+
+#define RV_MON_TYPE RV_MON_PER_TASK
+#include "wwnr.h"
+#include <rv/da_monitor.h>
+
+static void handle_switch(void *data, bool preempt, struct task_struct *p,
+			  struct task_struct *n, unsigned int prev_state)
+{
+	/* start monitoring only after the first suspension */
+	if (prev_state == TASK_INTERRUPTIBLE)
+		da_handle_start_event(p, switch_out_wwnr);
+	else
+		da_handle_event(p, switch_out_wwnr);
+
+	da_handle_event(n, switch_in_wwnr);
+}
+
+static void handle_wakeup(void *data, struct task_struct *p)
+{
+	da_handle_event(p, wakeup_wwnr);
+}
+
+static int enable_wwnr(void)
+{
+	int retval;
+
+	retval = da_monitor_init();
+	if (retval)
+		return retval;
+
+	rv_attach_trace_probe("wwnr", sched_switch, handle_switch);
+	rv_attach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
+
+	return 0;
+}
+
+static void disable_wwnr(void)
+{
+	rv_this.enabled = 0;
+
+	rv_detach_trace_probe("wwnr", sched_switch, handle_switch);
+	rv_detach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
+
+	da_monitor_destroy();
+}
+
+static struct rv_monitor rv_this = {
+	.name = "wwnr",
+	.description = "wakeup while not running per-task testing model.",
+	.enable = enable_wwnr,
+	.disable = disable_wwnr,
+	.reset = da_monitor_reset_all,
+	.enabled = 0,
+};
+
+static int __init register_wwnr(void)
+{
+	return rv_register_monitor(&rv_this, NULL);
+}
+
+static void __exit unregister_wwnr(void)
+{
+	rv_unregister_monitor(&rv_this);
+}
+
+module_init(register_wwnr);
+module_exit(unregister_wwnr);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Daniel Bristot de Oliveira <bristot@kernel.org>");
+MODULE_DESCRIPTION("wwnr: wakeup while not running monitor");

linux-7.2.3/kernel/trace/rv/monitors/wwnr/wwnr.h

@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Automatically generated C representation of wwnr automaton
+ * For further information about this format, see kernel documentation:
+ *   Documentation/trace/rv/deterministic_automata.rst
+ */
+
+#define MONITOR_NAME wwnr
+
+enum states_wwnr {
+	not_running_wwnr,
+	running_wwnr,
+	state_max_wwnr,
+};
+
+#define INVALID_STATE state_max_wwnr
+
+enum events_wwnr {
+	switch_in_wwnr,
+	switch_out_wwnr,
+	wakeup_wwnr,
+	event_max_wwnr,
+};
+
+struct automaton_wwnr {
+	char *state_names[state_max_wwnr];
+	char *event_names[event_max_wwnr];
+	unsigned char function[state_max_wwnr][event_max_wwnr];
+	unsigned char initial_state;
+	bool final_states[state_max_wwnr];
+};
+
+static const struct automaton_wwnr automaton_wwnr = {
+	.state_names = {
+		"not_running",
+		"running",
+	},
+	.event_names = {
+		"switch_in",
+		"switch_out",
+		"wakeup",
+	},
+	.function = {
+		{       running_wwnr,      INVALID_STATE,   not_running_wwnr },
+		{      INVALID_STATE,   not_running_wwnr,      INVALID_STATE },
+	},
+	.initial_state = not_running_wwnr,
+	.final_states = { 1, 0 },
+};

linux-7.2.3/kernel/trace/rv/monitors/wwnr/wwnr_trace.h

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * Snippet to be included in rv_trace.h
+ */
+
+#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 final_state),
+	     TP_ARGS(id, state, event, next_state, final_state));
+
+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 */