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Subject[PATCH 2/6] perf gtk/hists: Add support for callchains
Date
From: Namhyung Kim <namhyung.kim@lge.com>

Display callchain information in the symbol column. It's only enabled
when recorded with -g and has symbol sort key.

Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/ui/gtk/hists.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)

diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index cb6a9b45f789..226c7e10f3cc 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -124,6 +124,55 @@ void perf_gtk__init_hpp(void)
perf_gtk__hpp_color_overhead_guest_us;
}

+static void callchain_list__sym_name(struct callchain_list *cl,
+ char *bf, size_t bfsize)
+{
+ if (cl->ms.sym)
+ scnprintf(bf, bfsize, "%s", cl->ms.sym->name);
+ else
+ scnprintf(bf, bfsize, "%#" PRIx64, cl->ip);
+}
+
+static void perf_gtk__add_callchain(struct rb_root *root, GtkTreeStore *store,
+ GtkTreeIter *parent, int col)
+{
+ struct rb_node *nd;
+ bool has_single_node = (rb_first(root) == rb_last(root));
+
+ for (nd = rb_first(root); nd; nd = rb_next(nd)) {
+ struct callchain_node *node;
+ struct callchain_list *chain;
+ GtkTreeIter iter, new_parent;
+ bool need_new_parent;
+
+ node = rb_entry(nd, struct callchain_node, rb_node);
+
+ new_parent = *parent;
+ need_new_parent = !has_single_node && (node->val_nr > 1);
+
+ list_for_each_entry(chain, &node->val, list) {
+ char buf[128];
+
+ gtk_tree_store_append(store, &iter, &new_parent);
+
+ callchain_list__sym_name(chain, buf, sizeof(buf));
+ gtk_tree_store_set(store, &iter, col, buf, -1);
+
+ if (need_new_parent) {
+ /*
+ * Only show the top-most symbol in a callchain
+ * if it's not the only callchain.
+ */
+ new_parent = iter;
+ need_new_parent = false;
+ }
+ }
+
+ /* Now 'iter' contains info of the last callchain_list */
+ perf_gtk__add_callchain(&node->rb_root, store, &iter, col);
+ }
+}
+
static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
float min_pcnt)
{
@@ -135,6 +184,7 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
struct rb_node *nd;
GtkWidget *view;
int col_idx;
+ int sym_col = -1;
int nr_cols;
char s[512];

@@ -153,6 +203,9 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
if (se->elide)
continue;

+ if (se == &sort_sym)
+ sym_col = nr_cols;
+
col_types[nr_cols++] = G_TYPE_STRING;
}

@@ -183,6 +236,13 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,
col_idx++, NULL);
}

+ if (symbol_conf.use_callchain && sort__has_sym) {
+ GtkTreeViewColumn *column;
+
+ column = gtk_tree_view_get_column(GTK_TREE_VIEW(view), sym_col);
+ gtk_tree_view_set_expander_column(GTK_TREE_VIEW(view), column);
+ }
+
gtk_tree_view_set_model(GTK_TREE_VIEW(view), GTK_TREE_MODEL(store));

g_object_unref(GTK_TREE_MODEL(store));
@@ -221,6 +281,11 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists,

gtk_tree_store_set(store, &iter, col_idx++, s, -1);
}
+
+ if (symbol_conf.use_callchain && sort__has_sym) {
+ perf_gtk__add_callchain(&h->sorted_chain, store, &iter,
+ sym_col);
+ }
}

gtk_container_add(GTK_CONTAINER(window), view);
--
1.7.11.7


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