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perf callchain: Check return value of append_chain_children() 

Now it can check the error case, so check and pass it to the caller.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1455631723-17345-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2016-02-16 23:08:24 +09:00 committed by Arnaldo Carvalho de Melo
parent f2bb4c5af4
commit dca0d122e4
1 changed files with 12 additions and 6 deletions
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18
tools/perf/util/callchain.c
View File

@ -586,7 +586,7 @@ append_chain(struct callchain_node *root,
struct callchain_cursor *cursor,
u64 period);
static void
static int
append_chain_children(struct callchain_node *root,
struct callchain_cursor *cursor,
u64 period)
@ -598,7 +598,7 @@ append_chain_children(struct callchain_node *root,
node = callchain_cursor_current(cursor);
if (!node)
return;
return -1;
/* lookup in childrens */
while (*p) {
@ -611,6 +611,8 @@ append_chain_children(struct callchain_node *root,
ret = append_chain(rnode, cursor, period);
if (ret == MATCH_EQ)
goto inc_children_hit;
if (ret == MATCH_ERROR)
return -1;
if (ret == MATCH_LT)
p = &parent->rb_left;
@ -620,7 +622,7 @@ append_chain_children(struct callchain_node *root,
/* nothing in children, add to the current node */
rnode = add_child(root, cursor, period);
if (rnode == NULL)
return;
return -1;
rb_link_node(&rnode->rb_node_in, parent, p);
rb_insert_color(&rnode->rb_node_in, &root->rb_root_in);
@ -628,6 +630,7 @@ append_chain_children(struct callchain_node *root,
inc_children_hit:
root->children_hit += period;
root->children_count++;
return 0;
}
static enum match_result
@ -688,7 +691,8 @@ append_chain(struct callchain_node *root,
}
/* We match the node and still have a part remaining */
append_chain_children(root, cursor, period);
if (append_chain_children(root, cursor, period) < 0)
return MATCH_ERROR;
return MATCH_EQ;
}
@ -702,7 +706,8 @@ int callchain_append(struct callchain_root *root,
callchain_cursor_commit(cursor);
append_chain_children(&root->node, cursor, period);
if (append_chain_children(&root->node, cursor, period) < 0)
return -1;
if (cursor->nr > root->max_depth)
root->max_depth = cursor->nr;
@ -730,7 +735,8 @@ merge_chain_branch(struct callchain_cursor *cursor,
if (src->hit) {
callchain_cursor_commit(cursor);
append_chain_children(dst, cursor, src->hit);
if (append_chain_children(dst, cursor, src->hit) < 0)
return -1;
}
n = rb_first(&src->rb_root_in);