wrapper to access context fields

[lttngtop.git] / src / common.c

diff --git a/src/common.c b/src/common.c
index f628ed56d5961673017aef03c3f256913b23f080..d9ec95b33281f07628cece74325414109647fac5 100644 (file)
--- a/src/common.c
+++ b/src/common.c
@@ -16,6 +16,7 @@
  * MA 02111-1307, USA.
  */
 
+#include <babeltrace/ctf/events.h>
 #include <stdlib.h>
 #include <string.h>
 #include "common.h"
@@ -35,6 +36,70 @@ uint64_t get_cpu_id(struct bt_ctf_event *event)
        return cpu_id;
 }
 
+uint64_t get_context_tid(struct bt_ctf_event *event)
+{
+       struct definition *scope;
+       uint64_t tid;
+
+       scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
+       tid = bt_ctf_get_int64(bt_ctf_get_field(event,
+                               scope, "_tid"));
+       if (bt_ctf_field_get_error()) {
+               fprintf(stderr, "Missing tid context info\n");
+               return -1ULL;
+       }
+
+       return tid;
+}
+
+uint64_t get_context_pid(struct bt_ctf_event *event)
+{
+       struct definition *scope;
+       uint64_t pid;
+
+       scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
+       pid = bt_ctf_get_int64(bt_ctf_get_field(event,
+                               scope, "_pid"));
+       if (bt_ctf_field_get_error()) {
+               fprintf(stderr, "Missing pid context info\n");
+               return -1ULL;
+       }
+
+       return pid;
+}
+
+uint64_t get_context_ppid(struct bt_ctf_event *event)
+{
+       struct definition *scope;
+       uint64_t ppid;
+
+       scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
+       ppid = bt_ctf_get_int64(bt_ctf_get_field(event,
+                               scope, "_ppid"));
+       if (bt_ctf_field_get_error()) {
+               fprintf(stderr, "Missing ppid context info\n");
+               return -1ULL;
+       }
+
+       return ppid;
+}
+
+char *get_context_comm(struct bt_ctf_event *event)
+{
+       struct definition *scope;
+       char *comm;
+
+       scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
+       comm = bt_ctf_get_char_array(bt_ctf_get_field(event,
+                               scope, "_procname"));
+       if (bt_ctf_field_get_error()) {
+               fprintf(stderr, "Missing comm context info\n");
+               return NULL;
+       }
+
+       return comm;
+}
+
 struct processtop *find_process_tid(struct lttngtop *ctx, int tid, char *comm)
 {
        gint i;