From: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
Date: Fri, 9 May 2014 20:54:59 +0000 (-0400)
Subject: ftrace: Add trampolines to enabled_functions debug file
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9674b2fadab636b1fe27b282f9a9fa0f9d8c9839;p=openwrt%2Fstaging%2Fblogic.git

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>
---

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;