trace-graph: Fix start and end event info box

The event info box was showing the wrong task if the pointer was before
the first record or after the last.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 22 insertions, 4 deletions

diff --git a/trace-graph.c b/trace-graph.c
index 8204fc9..8676d6a 100644
--- a/trace-graph.c
+++ b/trace-graph.c
@@ -901,8 +901,10 @@ static void draw_cpu_info(struct graph_info *ginfo, gint cpu, gint x, gint y)
                                 trace_seq_putc(&s, '\n');
                         } else
                                 trace_seq_printf(&s, "UNKNOW EVENT %d\n", type);
-                } else
-                        check_sched_switch(ginfo, record, &pid, &comm);
+                } else {
+                        if (record->ts < time)
+                                check_sched_switch(ginfo, record, &pid, &comm);
+                }
 
                 trace_seq_printf(&s, "%lu.%06lu", sec, usec);
                 if (pid)
@@ -912,8 +914,24 @@ static void draw_cpu_info(struct graph_info *ginfo, gint cpu, gint x, gint y)
 
                 free_record(record);
 
-        } else
-                trace_seq_printf(&s, "%lu.%06lu", sec, usec);
+        } else {
+                record = tracecmd_read_cpu_last(ginfo->handle, cpu);
+                if (record->ts < time) {
+                        if (!check_sched_switch(ginfo, record, &pid, &comm)) {
+                                pid = pevent_data_pid(ginfo->pevent, record);
+                                comm = pevent_data_comm_from_pid(ginfo->pevent, pid);
+                        }
+
+                        trace_seq_printf(&s, "%lu.%06lu", sec, usec);
+                        if (pid)
+                                trace_seq_printf(&s, " %s-%d", comm, pid);
+                        else
+                                trace_seq_puts(&s, " <idle>");
+
+                } else
+                        trace_seq_printf(&s, "%lu.%06lu", sec, usec);
+                free_record(record);
+        }
 
         trace_seq_putc(&s, 0);