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tools lib traceevent: Add builtin handler for trace_marker_raw

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When something is written into trace_marker_raw, it goes in as a binary.
But the printk_fmt() of the event that is created (raw_data)'s format
file only prints the first byte of data:

  print fmt: "id:%04x %08x", REC->id, (int)REC->buf[0]

This is not very useful if we want to see the full data output.

Implement the processing of the raw_data event like it is in the kernel.

Link: http://lore.kernel.org/linux-trace-devel/20200702174950.123454-5-tz.stoyanov@gmail.com

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
[ Ported from trace-cmd.git ]
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200702185705.445969275@goodmis.org
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Steven Rostedt (VMware) 2020-07-02 14:53:57 -04:00 committed by Arnaldo Carvalho de Melo
parent 0dfceeffae
commit 9b8179b38b
1 changed files with 41 additions and 0 deletions
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41
tools/lib/traceevent/plugins/plugin_function.c
View file

@ -222,6 +222,44 @@ trace_stack_handler(struct trace_seq *s, struct tep_record *record,
return 0;
}
static int
trace_raw_data_handler(struct trace_seq *s, struct tep_record *record,
struct tep_event *event, void *context)
{
struct tep_format_field *field;
unsigned long long id;
int long_size;
void *data = record->data;
if (tep_get_field_val(s, event, "id", record, &id, 1))
return trace_seq_putc(s, '!');
trace_seq_printf(s, "# %llx", id);
field = tep_find_any_field(event, "buf");
if (!field) {
trace_seq_printf(s, "<CANT FIND FIELD %s>", "buf");
return 0;
}
long_size = tep_get_long_size(event->tep);
for (data += field->offset; data < record->data + record->size;
data += long_size) {
int size = sizeof(long);
int left = (record->data + record->size) - data;
int i;
if (size > left)
size = left;
for (i = 0; i < size; i++)
trace_seq_printf(s, " %02x", *(unsigned char *)(data + i));
}
return 0;
}
int TEP_PLUGIN_LOADER(struct tep_handle *tep)
{
tep_register_event_handler(tep, -1, "ftrace", "function",
@ -230,6 +268,9 @@ int TEP_PLUGIN_LOADER(struct tep_handle *tep)
tep_register_event_handler(tep, -1, "ftrace", "kernel_stack",
trace_stack_handler, NULL);
tep_register_event_handler(tep, -1, "ftrace", "raw_data",
trace_raw_data_handler, NULL);
tep_plugin_add_options("ftrace", plugin_options);
return 0;