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authorSteven Rostedt <rostedt@goodmis.org>2016-07-06 15:25:08 -0400
committerSteven Rostedt <rostedt@goodmis.org>2016-11-15 15:13:59 -0500
commitfa32e8557b470f5ff90babc6cbacc61535a81a0f (patch)
treefa3fdc74436987c4832e2941659efa1b6f22d874 /kernel/trace/trace_output.c
parent9648dc15772d77b5431cd5c11675d90eee1a4c2f (diff)
downloadlinux-fa32e8557b470f5ff90babc6cbacc61535a81a0f.tar.bz2
tracing: Add new trace_marker_raw
A new file is created: /sys/kernel/debug/tracing/trace_marker_raw This allows for appications to create data structures and write the binary data directly into it, and then read the trace data out from trace_pipe_raw into the same type of data structure. This saves on converting numbers into ASCII that would be required by trace_marker. Suggested-by: Olof Johansson <olof@lixom.net> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_output.c')
-rw-r--r--kernel/trace/trace_output.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 3fc20422c166..5d33a7352919 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -1288,6 +1288,35 @@ static struct trace_event trace_print_event = {
.funcs = &trace_print_funcs,
};
+static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
+ struct trace_event *event)
+{
+ struct raw_data_entry *field;
+ int i;
+
+ trace_assign_type(field, iter->ent);
+
+ trace_seq_printf(&iter->seq, "# %x buf:", field->id);
+
+ for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
+ trace_seq_printf(&iter->seq, " %02x",
+ (unsigned char)field->buf[i]);
+
+ trace_seq_putc(&iter->seq, '\n');
+
+ return trace_handle_return(&iter->seq);
+}
+
+static struct trace_event_functions trace_raw_data_funcs = {
+ .trace = trace_raw_data,
+ .raw = trace_raw_data,
+};
+
+static struct trace_event trace_raw_data_event = {
+ .type = TRACE_RAW_DATA,
+ .funcs = &trace_raw_data_funcs,
+};
+
static struct trace_event *events[] __initdata = {
&trace_fn_event,
@@ -1299,6 +1328,7 @@ static struct trace_event *events[] __initdata = {
&trace_bprint_event,
&trace_print_event,
&trace_hwlat_event,
+ &trace_raw_data_event,
NULL
};