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Code Issues Releases Wiki Activity

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 <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2014-07-24 16:00:31 -04:00 committed by Steven Rostedt
parent 3296fc4e25
commit 5fecaa044a
1 changed files with 20 additions and 1 deletions
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21
kernel/trace/ftrace.c
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@ -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);