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| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-02-23 15:28:27 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-02 07:50:36 +0200 |
| commit | 896e30f76840c9cc196927ee69109745fb23d499 (patch) | |
| tree | cd360f566860b3a865a6a988c8e26db1a6c9bcd9 /samples | |
| parent | 5724654a084f701dc64b08d34a0e800f22f0e6e4 (diff) | |
| download | linux-896e30f76840c9cc196927ee69109745fb23d499.tar.gz linux-896e30f76840c9cc196927ee69109745fb23d499.tar.bz2 linux-896e30f76840c9cc196927ee69109745fb23d499.zip | |
tracing: Add __string_len() example
[ Upstream commit dd6ae6d90a84d4bec49887c7aa2b22aa1c8b2897 ]
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>
Stable-dep-of: ea8d7647f9dd ("tracing: Verify event formats that have "%*p.."")
Signed-off-by: Sasha Levin <sashal@kernel.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 1c6b843b8c4e..04541dfbd44c 100644 --- a/samples/trace_events/trace-events-sample.h +++ b/samples/trace_events/trace-events-sample.h @@ -302,6 +302,7 @@ 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( @@ -310,12 +311,13 @@ 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: @@ -359,7 +361,8 @@ 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)) ); |