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