diff options
| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-02-23 15:28:27 -0500 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-03-18 10:33:05 -0400 |
| commit | dd6ae6d90a84d4bec49887c7aa2b22aa1c8b2897 (patch) | |
| tree | bd1d405a43397778b194c8631175df5f5d583136 /samples | |
| parent | c759e609030ca37e59866cbc849fdc611cc56292 (diff) | |
tracing: Add __string_len() example
There's no example code that uses __string_len(), and since the sample
code is used for testing the event logic, add a use case.
Link: https://lore.kernel.org/linux-trace-kernel/20240223152827.5f9f78e2@gandalf.local.home
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/trace_events/trace-events-sample.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/samples/trace_events/trace-events-sample.h b/samples/trace_events/trace-events-sample.h index f2d2d56ce8e2..2dfaf7fc7bfa 100644 --- a/samples/trace_events/trace-events-sample.h +++ b/samples/trace_events/trace-events-sample.h @@ -303,6 +303,7 @@ TRACE_EVENT(foo_bar, __bitmask( cpus, num_possible_cpus() ) __cpumask( cpum ) __vstring( vstr, fmt, va ) + __string_len( lstr, foo, bar / 2 < strlen(foo) ? bar / 2 : strlen(foo) ) ), TP_fast_assign( @@ -311,12 +312,13 @@ TRACE_EVENT(foo_bar, memcpy(__get_dynamic_array(list), lst, __length_of(lst) * sizeof(int)); __assign_str(str, string); + __assign_str(lstr, foo); __assign_vstr(vstr, fmt, va); __assign_bitmask(cpus, cpumask_bits(mask), num_possible_cpus()); __assign_cpumask(cpum, cpumask_bits(mask)); ), - TP_printk("foo %s %d %s %s %s %s (%s) (%s) %s", __entry->foo, __entry->bar, + TP_printk("foo %s %d %s %s %s %s %s (%s) (%s) %s", __entry->foo, __entry->bar, /* * Notice here the use of some helper functions. This includes: @@ -360,7 +362,8 @@ TRACE_EVENT(foo_bar, __print_array(__get_dynamic_array(list), __get_dynamic_array_len(list) / sizeof(int), sizeof(int)), - __get_str(str), __get_bitmask(cpus), __get_cpumask(cpum), + __get_str(str), __get_str(lstr), + __get_bitmask(cpus), __get_cpumask(cpum), __get_str(vstr)) ); |