2023-05-25 09:12:13

by sunliming

[permalink] [raw]
Subject: [PATCH] tracing: Modify print_fields() for fields output order

Now the print_fields() print trace event fields in reverse order. Modify
it to the positive sequence.

Example outputs for a user event:
test0 u32 count1; u32 count2

Output before:
example-2547 [000] ..... 325.666387: test0: count2=0x2 (2) count1=0x1 (1)

Output after:
example-2742 [002] ..... 429.769370: test0: count1=0x1 (1) count2=0x2 (2)

Signed-off-by: sunliming <[email protected]>
---
kernel/trace/trace_output.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 15f05faaae44..1e33f367783e 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -847,7 +847,7 @@ static void print_fields(struct trace_iterator *iter, struct trace_event_call *c
int ret;
void *pos;

- list_for_each_entry(field, head, link) {
+ list_for_each_entry_reverse(field, head, link) {
trace_seq_printf(&iter->seq, " %s=", field->name);
if (field->offset + field->size > iter->ent_size) {
trace_seq_puts(&iter->seq, "<OVERFLOW>");
--
2.25.1