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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2014-07-24 17:26:11 +0200
committerSteven Rostedt <rostedt@goodmis.org>2014-07-24 17:26:11 +0200
commitdc6f03f26f570104a2bb03f9d1deb588026d7c75 (patch)
treed2834b5e90000dee36132694395e0911e6c3f16e /kernel/trace/ftrace.c
parentftrace: Fix trampoline hash update check on rec->flags (diff)
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ftrace: Add warning if tramp hash does not match nr_trampolines
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>
Diffstat (limited to 'kernel/trace/ftrace.c')
-rw-r--r--kernel/trace/ftrace.c3
1 files changed, 3 insertions, 0 deletions
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;
}