Commit 84bde62c authored by Steven Rostedt (Red Hat)'s avatar Steven Rostedt (Red Hat) Committed by Steven Rostedt

ftrace: Add sanity check when unregistering last ftrace_ops

When the last ftrace_ops is unregistered, all the function records should
have a zeroed flags value. Make sure that is the case when the last ftrace_ops
is unregistered.
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent fb5a613b
...@@ -2416,6 +2416,21 @@ static int ftrace_shutdown(struct ftrace_ops *ops, int command) ...@@ -2416,6 +2416,21 @@ static int ftrace_shutdown(struct ftrace_ops *ops, int command)
ftrace_run_update_code(command); ftrace_run_update_code(command);
/*
* If there's no more ops registered with ftrace, run a
* sanity check to make sure all rec flags are cleared.
*/
if (ftrace_ops_list == &ftrace_list_end) {
struct ftrace_page *pg;
struct dyn_ftrace *rec;
do_for_each_ftrace_rec(pg, rec) {
if (FTRACE_WARN_ON_ONCE(rec->flags))
pr_warn(" %pS flags:%lx\n",
(void *)rec->ip, rec->flags);
} while_for_each_ftrace_rec();
}
ops->old_hash.filter_hash = NULL; ops->old_hash.filter_hash = NULL;
ops->old_hash.notrace_hash = NULL; ops->old_hash.notrace_hash = NULL;
......
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