diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2021-11-22 18:30:30 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-12-06 15:37:22 -0500 |
| commit | b466b13321648d3bd7bfceb9afcba5302b585cf8 (patch) | |
| tree | 6f5ef22ae41cd91c77ca54601d180a811a54c14f /samples | |
| parent | 55de2c0b5610cba5a5a93c0788031133c457e689 (diff) | |
| download | linux-b466b13321648d3bd7bfceb9afcba5302b585cf8.tar.bz2 | |
samples/trace_event: Add '__rel_loc' using sample event
Add '__rel_loc' using sample event for testing.
User can use this for testing purpose. There is
no reason to use this macro from the kernel.
Link: https://lkml.kernel.org/r/163757343050.510314.2876529802471645178.stgit@devnote2
Cc: Beau Belgrave <beaub@linux.microsoft.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/trace_events/trace-events-sample.c | 3 | ||||
| -rw-r--r-- | samples/trace_events/trace-events-sample.h | 33 |
2 files changed, 36 insertions, 0 deletions
diff --git a/samples/trace_events/trace-events-sample.c b/samples/trace_events/trace-events-sample.c index 1a72b7d95cdc..4d34dc0b0fee 100644 --- a/samples/trace_events/trace-events-sample.c +++ b/samples/trace_events/trace-events-sample.c @@ -21,6 +21,7 @@ static const char *random_strings[] = { static void simple_thread_func(int cnt) { + unsigned long bitmask[1] = {0xdeadbeefUL}; int array[6]; int len = cnt % 5; int i; @@ -43,6 +44,8 @@ static void simple_thread_func(int cnt) trace_foo_with_template_cond("prints other times", cnt); trace_foo_with_template_print("I have to be different", cnt); + + trace_foo_rel_loc("Hello __rel_loc", cnt, bitmask); } static int simple_thread(void *arg) diff --git a/samples/trace_events/trace-events-sample.h b/samples/trace_events/trace-events-sample.h index e61471ab7d14..5ab74fc9a2df 100644 --- a/samples/trace_events/trace-events-sample.h +++ b/samples/trace_events/trace-events-sample.h @@ -506,6 +506,39 @@ DEFINE_EVENT_PRINT(foo_template, foo_with_template_print, TP_ARGS(foo, bar), TP_printk("bar %s %d", __get_str(foo), __entry->bar)); +/* + * There are yet another __rel_loc dynamic data attribute. If you + * use __rel_dynamic_array() and __rel_string() etc. macros, you + * can use this attribute. There is no difference from the viewpoint + * of functionality with/without 'rel' but the encoding is a bit + * different. This is expected to be used with user-space event, + * there is no reason that the kernel event use this, but only for + * testing. + */ + +TRACE_EVENT(foo_rel_loc, + + TP_PROTO(const char *foo, int bar, unsigned long *mask), + + TP_ARGS(foo, bar, mask), + + TP_STRUCT__entry( + __rel_string( foo, foo ) + __field( int, bar ) + __rel_bitmask( bitmask, + BITS_PER_BYTE * sizeof(unsigned long) ) + ), + + TP_fast_assign( + __assign_rel_str(foo, foo); + __entry->bar = bar; + __assign_rel_bitmask(bitmask, mask, + BITS_PER_BYTE * sizeof(unsigned long)); + ), + + TP_printk("foo_rel_loc %s, %d, %s", __get_rel_str(foo), __entry->bar, + __get_rel_bitmask(bitmask)) +); #endif /***** NOTICE! The #if protection ends here. *****/ |