From 5fecaa044af3dc52e4bc138842bdf1c6676105b1 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Thu, 24 Jul 2014 16:00:31 -0400 Subject: [PATCH] ftrace: Grab any ops for a rec for enabled_functions output When dumping the enabled_functions, use the first op that is found with a trampoline to the record, as there should only be one, as only one ops can be registered to a function that has a trampoline. Signed-off-by: Steven Rostedt --- kernel/trace/ftrace.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 2c4eef49b1af..858ac16f8492 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1900,6 +1900,25 @@ int ftrace_test_record(struct dyn_ftrace *rec, int enable) return ftrace_check_record(rec, enable, 0); } +static struct ftrace_ops * +ftrace_find_tramp_ops_any(struct dyn_ftrace *rec) +{ + struct ftrace_ops *op; + + do_for_each_ftrace_op(op, ftrace_ops_list) { + + if (!op->trampoline) + continue; + + if (ftrace_lookup_ip(op->func_hash->filter_hash, rec->ip) && + (ftrace_hash_empty(op->func_hash->notrace_hash) || + !ftrace_lookup_ip(op->func_hash->notrace_hash, rec->ip))) + return op; + } while_for_each_ftrace_op(op); + + return NULL; +} + static struct ftrace_ops * ftrace_find_tramp_ops_curr(struct dyn_ftrace *rec) { @@ -2966,7 +2985,7 @@ static int t_show(struct seq_file *m, void *v) if (rec->flags & FTRACE_FL_TRAMP_EN) { struct ftrace_ops *ops; - ops = ftrace_find_tramp_ops_curr(rec); + ops = ftrace_find_tramp_ops_any(rec); if (ops && ops->trampoline) seq_printf(m, "\ttramp: %pS", (void *)ops->trampoline); -- 2.20.1