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>

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;