trace-graph: Add find_record to plots for popup windows

The popup needs a record to use to determin if a task should be
added to the filter or not. Add the method find_record to the
plot callback structure.

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

1 files changed, 38 insertions, 1 deletions

diff --git a/trace-plot-cpu.c b/trace-plot-cpu.c
index b1adb91..5d37950 100644
--- a/trace-plot-cpu.c
+++ b/trace-plot-cpu.c
@@ -275,12 +275,49 @@ static int cpu_plot_event(struct graph_info *ginfo,
         return ret;
 }
 
+static struct record *
+find_record_on_cpu(struct graph_info *ginfo, gint cpu, guint64 time)
+{
+        struct record *record = NULL;
+        guint64 offset = 0;
+
+        tracecmd_set_cpu_to_timestamp(ginfo->handle, cpu, time);
+        do {
+                if (record) {
+                        offset = record->offset;
+                        free_record(record);
+                }
+                record = tracecmd_read_data(ginfo->handle, cpu);
+        } while (record && record->ts <= (time - 1 / ginfo->resolution));
+
+        if (record) {
+                if (record->ts > (time + 1 / ginfo->resolution) && offset) {
+                        free_record(record);
+                        record = tracecmd_read_at(ginfo->handle, offset, NULL);
+                }
+        }
+
+        return record;
+}
+
+static struct record *
+cpu_plot_find_record(struct graph_info *ginfo, struct graph_plot *plot,
+                     unsigned long long time)
+{
+        struct cpu_plot_info *cpu_info = plot->private;
+        int cpu;
+
+        cpu = cpu_info->cpu;
+
+        return find_record_on_cpu(ginfo, cpu, time);
+}
 
 static const struct plot_callbacks cpu_plot_cb = {
         .match_time             = cpu_plot_match_time,
         .plot_event             = cpu_plot_event,
         .start                  = cpu_plot_start,
-        .display_last_event     = cpu_plot_display_last_event
+        .display_last_event     = cpu_plot_display_last_event,
+        .find_record            = cpu_plot_find_record,
 };
 
 void graph_plot_init_cpus(struct graph_info *ginfo, int cpus)