Migrate tracepoint instrumentation to TP_FIELDS

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

diff --git a/lttng-context-vtid.c b/lttng-context-vtid.c
index 8abba82bfc93c14cf88e19000be7f545a55c98ff..a264424fcf01510d766c1e053ea0e270dffd4efe 100644 (file)
--- a/lttng-context-vtid.c
+++ b/lttng-context-vtid.c
@@ -56,6 +56,22 @@ void vtid_record(struct lttng_ctx_field *field,
        chan->ops->event_write(ctx, &vtid, sizeof(vtid));
 }
 
+static
+void vtid_get_value(struct lttng_ctx_field *field,
+               union lttng_ctx_value *value)
+{
+       pid_t vtid;
+
+       /*
+        * nsproxy can be NULL when scheduled out of exit.
+        */
+       if (!current->nsproxy)
+               vtid = 0;
+       else
+               vtid = task_pid_vnr(current);
+       value->s64 = vtid;
+}
+
 int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx)
 {
        struct lttng_ctx_field *field;
@@ -77,6 +93,7 @@ int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx)
        field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
        field->get_size = vtid_get_size;
        field->record = vtid_record;
+       field->get_value = vtid_get_value;
        lttng_context_update(*ctx);
        wrapper_vmalloc_sync_all();
        return 0;