[PATCH v6 05/25] perf callchain: Check return value of split_add_child()

Namhyung Kim
2016-02-16T14:18:46Z

Now create_child() and add_child() return errors so check and pass it
to the caller.

Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/callchain.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index dab2c1f1e86b..5259379892e1 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -508,7 +508,7 @@ static enum match_result match_chain(struct callchain_cursor_node *node,
* give a part of its callchain to the created child.
* Then create another child to host the given callchain of new branch
*/
-static void
+static int
split_add_child(struct callchain_node *parent,
struct callchain_cursor *cursor,
struct callchain_list *to_split,
@@ -520,6 +520,8 @@ split_add_child(struct callchain_node *parent,

/* split */
new = create_child(parent, true);
+ if (new == NULL)
+ return -1;

/* split the callchain and move a part to the new child */
old_tail = parent->val.prev;
@@ -554,7 +556,7 @@ split_add_child(struct callchain_node *parent,
node = callchain_cursor_current(cursor);
new = add_child(parent, cursor, period);
if (new == NULL)
- return;
+ return -1;

/*
* This is second child since we moved parent's children
@@ -576,6 +578,7 @@ split_add_child(struct callchain_node *parent,
parent->hit = period;
parent->count = 1;
}
+ return 0;
}

static enum match_result
@@ -670,7 +673,10 @@ append_chain(struct callchain_node *root,

/* we match only a part of the node. Split it and add the new chain */
if (matches < root->val_nr) {
- split_add_child(root, cursor, cnode, start, matches, period);
+ if (split_add_child(root, cursor, cnode, start, matches,
+ period) < 0)
+ return MATCH_ERROR;
+
return MATCH_EQ;
}

--
2.7.1