Fix: update writeback instrumentation for kernel 4.14

[lttng-modules.git] / lttng-context-pid.c

diff --git a/lttng-context-pid.c b/lttng-context-pid.c
index cb64ff11422820111747591a6d379b9e5659916c..4cff30768d1da7a43f37a94df1c2b7b629a64884 100644 (file)
--- a/lttng-context-pid.c
+++ b/lttng-context-pid.c
@@ -23,10 +23,10 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
-#include "lttng-events.h"
-#include "wrapper/ringbuffer/frontend_types.h"
-#include "wrapper/vmalloc.h"
-#include "lttng-tracer.h"
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <lttng-tracer.h>
 
 static
 size_t pid_get_size(size_t offset)
@@ -50,6 +50,14 @@ void pid_record(struct lttng_ctx_field *field,
        chan->ops->event_write(ctx, &pid, sizeof(pid));
 }
 
+static
+void pid_get_value(struct lttng_ctx_field *field,
+               struct lttng_probe_ctx *lttng_probe_ctx,
+               union lttng_ctx_value *value)
+{
+       value->s64 = task_tgid_nr(current);
+}
+
 int lttng_add_pid_to_ctx(struct lttng_ctx **ctx)
 {
        struct lttng_ctx_field *field;
@@ -71,11 +79,9 @@ int lttng_add_pid_to_ctx(struct lttng_ctx **ctx)
        field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
        field->get_size = pid_get_size;
        field->record = pid_record;
+       field->get_value = pid_get_value;
+       lttng_context_update(*ctx);
        wrapper_vmalloc_sync_all();
        return 0;
 }
 EXPORT_SYMBOL_GPL(lttng_add_pid_to_ctx);
-
-MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit PID Context");