Messages in this thread Patch in this message | | | Date | Fri, 25 Jul 2014 10:05:18 -0400 | From | Steven Rostedt <> | Subject | [for-next][PATCH 4/4] ftrace: Add warning if tramp hash does not match nr_trampolines |
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From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
After adding all the records to the tramp_hash, add a check that makes sure that the number of records added matches the number of records expected to match and do a WARN_ON and disable ftrace if they do not match.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- kernel/trace/ftrace.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 6ef1989c2b2e..979bd8cb4349 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2226,6 +2226,9 @@ static int ftrace_save_ops_tramp_hash(struct ftrace_ops *ops) } } while_for_each_ftrace_rec(); + /* The number of recs in the hash must match nr_trampolines */ + FTRACE_WARN_ON(ops->tramp_hash->count != ops->nr_trampolines); + return 0; } -- 2.0.1
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