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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2014-05-09 16:54:59 -0400
committerSteven Rostedt <rostedt@goodmis.org>2014-07-01 07:13:32 -0400
commit9674b2fadab636b1fe27b282f9a9fa0f9d8c9839 (patch)
treed20059fdcca82f88b45c17f1ef99dc399c19449d
parent79922b8009c074e30d3a97f5a24519f11814ad03 (diff)
downloadlinux-9674b2fadab636b1fe27b282f9a9fa0f9d8c9839.tar.gz
ftrace: Add trampolines to enabled_functions debug file
The enabled_functions is used to help debug the dynamic function tracing. Adding what trampolines are attached to files is useful for debugging. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
-rw-r--r--kernel/trace/ftrace.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 5d15eb8146a7..3ded796e10e0 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2903,10 +2903,22 @@ static int t_show(struct seq_file *m, void *v)
return 0;
seq_printf(m, "%ps", (void *)rec->ip);
- if (iter->flags & FTRACE_ITER_ENABLED)
+ if (iter->flags & FTRACE_ITER_ENABLED) {
seq_printf(m, " (%ld)%s",
ftrace_rec_count(rec),
- rec->flags & FTRACE_FL_REGS ? " R" : "");
+ rec->flags & FTRACE_FL_REGS ? " R" : " ");
+ if (rec->flags & FTRACE_FL_TRAMP_EN) {
+ struct ftrace_ops *ops;
+
+ ops = ftrace_find_tramp_ops_curr(rec);
+ if (ops && ops->trampoline)
+ seq_printf(m, "\ttramp: %pS",
+ (void *)ops->trampoline);
+ else
+ seq_printf(m, "\ttramp: ERROR!");
+ }
+ }
+
seq_printf(m, "\n");
return 0;