X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttng-context-pid.c;h=698b242245a28b6e38484f65f21f129e53ab9774;hb=c595c36f753dde1bccbee455bbfeb8b31b7f41d1;hp=956920fd71709104ff84e071ef82fec57c36e37e;hpb=becb1a77f72c28357fc6509c1ec25dc8d4804b2c;p=lttng-modules.git

diff --git a/lttng-context-pid.c b/lttng-context-pid.c
index 956920fd..698b2422 100644
--- a/lttng-context-pid.c
+++ b/lttng-context-pid.c
@@ -32,7 +32,7 @@ void pid_record(struct lttng_ctx_field *field,
 {
 	pid_t pid;
 
-	pid = current->pid;
+	pid = task_tgid_nr(current);
 	lib_ring_buffer_align_ctx(ctx, ltt_alignof(pid));
 	chan->ops->event_write(ctx, &pid, sizeof(pid));
 }
@@ -40,11 +40,14 @@ void pid_record(struct lttng_ctx_field *field,
 int lttng_add_pid_to_ctx(struct lttng_ctx **ctx)
 {
 	struct lttng_ctx_field *field;
-	int ret;
 
 	field = lttng_append_context(ctx);
 	if (!field)
-		return ret;
+		return -ENOMEM;
+	if (lttng_find_context(*ctx, "pid")) {
+		lttng_remove_context_field(ctx, field);
+		return -EEXIST;
+	}
 	field->event_field.name = "pid";
 	field->event_field.type.atype = atype_integer;
 	field->event_field.type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;
@@ -62,4 +65,4 @@ EXPORT_SYMBOL_GPL(lttng_add_pid_to_ctx);
 
 MODULE_LICENSE("GPL and additional rights");
 MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit Perf Support");
+MODULE_DESCRIPTION("Linux Trace Toolkit PID Context");