Adds the instrumentation to the previously created wwnr monitor, as an
example of the developer work. It also adds a Makefile and Kconfig
entries.
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxx>
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Cc: Gabriele Paoloni <gpaoloni@xxxxxxxxxx>
Cc: Juri Lelli <juri.lelli@xxxxxxxxxx>
Cc: Clark Williams <williams@xxxxxxxxxx>
Cc: linux-doc@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-trace-devel@xxxxxxxxxxxxxxx
Signed-off-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
---
kernel/trace/rv/Kconfig | 7 ++++++
kernel/trace/rv/Makefile | 1 +
kernel/trace/rv/monitor_wwnr/wwnr.c | 35 +++++++++++++----------------
kernel/trace/rv/monitor_wwnr/wwnr.h | 2 +-
4 files changed, 24 insertions(+), 21 deletions(-)
diff --git a/kernel/trace/rv/Kconfig b/kernel/trace/rv/Kconfig
index 7338e661d78f..f2d0bed05a55 100644
--- a/kernel/trace/rv/Kconfig
+++ b/kernel/trace/rv/Kconfig
@@ -20,6 +20,13 @@ 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
+ tristate "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 20f30741b933..edad01bb2b5d 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-$(CONFIG_RV_MON_WIP) += monitor_wip/wip.o
+obj-$(CONFIG_RV_MON_WWNR) += monitor_wwnr/wwnr.o
diff --git a/kernel/trace/rv/monitor_wwnr/wwnr.c b/kernel/trace/rv/monitor_wwnr/wwnr.c
index 91cb3b70a6a7..cb364a02639b 100644
--- a/kernel/trace/rv/monitor_wwnr/wwnr.c
+++ b/kernel/trace/rv/monitor_wwnr/wwnr.c
@@ -33,39 +33,34 @@ DECLARE_DA_MON_PER_TASK(wwnr, char);
*
*/
-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)
{
- pid_t pid = /* XXX how do I get the pid? */;
- da_handle_event_wwnr(pid, switch_in);
-}
+ int ppid = p->pid;
+ int npid = n->pid;
-void handle_switch_out(void *data, /* XXX: fill header */)
-{
- pid_t pid = /* XXX how do I get the pid? */;
- da_handle_event_wwnr(pid, switch_out);
+ if (ppid && ppid < MAX_PID)
+ da_handle_init_event_wwnr(ppid, switch_out);
+
+ if (npid && npid < MAX_PID)
+ da_handle_event_wwnr(npid, switch_in);
}
-void handle_wakeup(void *data, /* XXX: fill header */)
+static void handle_wakeup(void *data, struct task_struct *p)
{
- pid_t pid = /* XXX how do I get the pid? */;
- da_handle_event_wwnr(pid, wakeup);
+ if (p->pid && p->pid < MAX_PID)
+ da_handle_event_wwnr(p->pid, wakeup);
}
-#define NR_TP 3
+#define NR_TP 2
static struct tracepoint_hook_helper tracepoints_to_hook[NR_TP] = {
{
- .probe = handle_switch_in,
- .name = /* XXX: tracepoint name here */,
- .registered = 0
- },
- {
- .probe = handle_switch_out,
- .name = /* XXX: tracepoint name here */,
+ .probe = handle_switch,
+ .name = "sched_switch",
.registered = 0
},
{
.probe = handle_wakeup,
- .name = /* XXX: tracepoint name here */,
+ .name = "sched_wakeup",
.registered = 0
},
};
diff --git a/kernel/trace/rv/monitor_wwnr/wwnr.h b/kernel/trace/rv/monitor_wwnr/wwnr.h
index 4af1827d2f16..387f5a83ee7c 100644
--- a/kernel/trace/rv/monitor_wwnr/wwnr.h
+++ b/kernel/trace/rv/monitor_wwnr/wwnr.h
@@ -65,6 +65,6 @@ TRACE_EVENT(error_wwnr,
/* This part ust be outside protection */
#undef TRACE_INCLUDE_PATH
-#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_PATH ../kernel/trace/rv/monitor_wwnr/
#define TRACE_INCLUDE_FILE wwnr
#include <trace/define_trace.h>
--
2.33.1
