* [PATCH 09/10] use defined fields and print_fmt to print formats
@ 2009-12-09 7:16 Lai Jiangshan
0 siblings, 0 replies; 2+ messages in thread
From: Lai Jiangshan @ 2009-12-09 7:16 UTC (permalink / raw)
To: Ingo Molnar, Steven Rostedt, Frederic Weisbecker,
Masami Hiramatsu, Jason Baron, LKML
It seems that ftrace_format_##call() and ftrace_define_fields_##call()
are duplicate more or less.
trace_define_field() defines fields and links them into
strcut ftrace_event_call. We reuse them to print formats
and remove ftrace_format_##call(). It make all things simpler.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index bf2f1b9..d12e75c 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -551,9 +551,11 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
loff_t *ppos)
{
struct ftrace_event_call *call = filp->private_data;
+ struct ftrace_event_field *field;
struct trace_seq *s;
+ int common_field_count = 5;
char *buf;
- int r;
+ int r = 0;
if (*ppos)
return 0;
@@ -564,14 +566,42 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
trace_seq_init(s);
- /* If any of the first writes fail, so will the show_format. */
-
trace_seq_printf(s, "name: %s\n", call->name);
trace_seq_printf(s, "ID: %d\n", call->id);
trace_seq_printf(s, "format:\n");
- trace_write_header(s);
- r = call->show_format(call, s);
+ list_for_each_entry_reverse(field, &call->fields, link) {
+ const char *array_descriptor = strchr(field->type, '[');
+
+ if (!strncmp(field->type, "__data_loc", 10))
+ array_descriptor = NULL;
+
+ if (!array_descriptor) {
+ r = trace_seq_printf(s, "\tfield:%s %s;\toffset:%u;"
+ "\tsize:%u;\tsigned:%d;\n",
+ field->type, field->name, field->offset,
+ field->size, !!field->is_signed);
+ } else {
+ r = trace_seq_printf(s, "\tfield:%.*s %s%s;\toffset:%u;"
+ "\tsize:%u;\tsigned:%d;\n",
+ array_descriptor - field->type,
+ field->type, field->name,
+ array_descriptor, field->offset,
+ field->size, !!field->is_signed);
+ }
+
+ if (--common_field_count == 0)
+ r = trace_seq_printf(s, "\n");
+
+ if (!r)
+ break;
+ }
+
+ if (r) {
+ r = trace_seq_printf(s, "\nprint fmt: %s\n",
+ call->print_fmt);
+ }
+
if (!r) {
/*
* ug! The format output is bigger than a PAGE!!
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH 09/10] use defined fields and print_fmt to print formats
@ 2009-12-15 7:39 Lai Jiangshan
0 siblings, 0 replies; 2+ messages in thread
From: Lai Jiangshan @ 2009-12-15 7:39 UTC (permalink / raw)
To: Ingo Molnar, Steven Rostedt, Frederic Weisbecker,
Masami Hiramatsu, Jason Baron, LKML
It seems that ftrace_format_##call() and ftrace_define_fields_##call()
are duplicate more or less.
trace_define_field() defines fields and links them into
strcut ftrace_event_call. And previous patches introduce
print_fmt, we reuse them all to print formats:
print name
print ID
print string "format:"
use struct ftrace_event_call->fields to print fields
use struct ftrace_event_call->print_fmt to print "print fmt: XXXXXXXXXXX"
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 189b09b..38c7fd0 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -552,9 +552,11 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
loff_t *ppos)
{
struct ftrace_event_call *call = filp->private_data;
+ struct ftrace_event_field *field;
struct trace_seq *s;
+ int common_field_count = 5;
char *buf;
- int r;
+ int r = 0;
if (*ppos)
return 0;
@@ -565,14 +567,49 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
trace_seq_init(s);
- /* If any of the first writes fail, so will the show_format. */
-
trace_seq_printf(s, "name: %s\n", call->name);
trace_seq_printf(s, "ID: %d\n", call->id);
trace_seq_printf(s, "format:\n");
- trace_write_header(s);
- r = call->show_format(call, s);
+ list_for_each_entry_reverse(field, &call->fields, link) {
+ /*
+ * Smartly shows the array type(except dynamic array).
+ * Normal:
+ * field:TYPE VAR
+ * If TYPE := TYPE[LEN], it is shown:
+ * field:TYPE VAR[LEN]
+ */
+ const char *array_descriptor = strchr(field->type, '[');
+
+ if (!strncmp(field->type, "__data_loc", 10))
+ array_descriptor = NULL;
+
+ if (!array_descriptor) {
+ r = trace_seq_printf(s, "\tfield:%s %s;\toffset:%u;"
+ "\tsize:%u;\tsigned:%d;\n",
+ field->type, field->name, field->offset,
+ field->size, !!field->is_signed);
+ } else {
+ r = trace_seq_printf(s, "\tfield:%.*s %s%s;\toffset:%u;"
+ "\tsize:%u;\tsigned:%d;\n",
+ array_descriptor - field->type,
+ field->type, field->name,
+ array_descriptor, field->offset,
+ field->size, !!field->is_signed);
+ }
+
+ if (--common_field_count == 0)
+ r = trace_seq_printf(s, "\n");
+
+ if (!r)
+ break;
+ }
+
+ if (r) {
+ r = trace_seq_printf(s, "\nprint fmt: %s\n",
+ call->print_fmt);
+ }
+
if (!r) {
/*
* ug! The format output is bigger than a PAGE!!
^ permalink raw reply related [flat|nested] 2+ messages in thread
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