linux-stable.git/tools/lib/traceevent/event-plugin.c, branch master

tools lib traceevent: Remove libtraceevent

2022-12-14T14:16:12+00:00

libtraceevent is now out-of-date and it is better to depend on the
system version. Remove this code that is no longer depended upon by
any builds.

Committer notes:

Removed the removed tools/lib/traceevent/ from tools/perf/MANIFEST, so
that 'make perf-tar-src-pkg' works.

Signed-off-by: Ian Rogers 
Acked-by: Steven Rostedt (VMware) 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Masami Hiramatsu 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lore.kernel.org/lkml/20221130062935.2219247-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Hide non API functions

2020-10-13T14:47:38+00:00

There are internal library functions, which are not declared as a static.
They are used inside the library from different files. Hide them from
the library users, as they are not part of the API.
These functions are made hidden and are renamed without the prefix "tep_":
 tep_free_plugin_paths
 tep_peek_char
 tep_buffer_init
 tep_get_input_buf_ptr
 tep_get_input_buf
 tep_read_token
 tep_free_token
 tep_free_event
 tep_free_format_field
 __tep_parse_format

Link: https://lore.kernel.org/linux-trace-devel/e4afdd82deb5e023d53231bb13e08dca78085fb0.camel@decadent.org.uk/
Reported-by: Ben Hutchings 
Signed-off-by: Tzvetomir Stoyanov (VMware) 
Reviewed-by: Steven Rostedt (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200930110733.280534-1-tz.stoyanov@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Handle possible strdup() error in tep_add_plugin_path() API

2020-08-06T12:27:50+00:00

Free allocated resources and return -1 in case strdup() fails in
tep_add_plugin_path() API.

Link: https://lore.kernel.org/r/CAM9d7chfvJwodpVrHGc5E2J80peRojmYV_fD8x3cpn9HFRUw2g@mail.gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200714103027.2477584-9-tz.stoyanov@gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200716092014.2613403-9-tz.stoyanov@gmail.com

Suggested-by: Namhyung Kim 
Signed-off-by: Tzvetomir Stoyanov (VMware) 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200722011755.720803193@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

libtraceevent: Fixed description of tep_add_plugin_path() API

2020-08-06T12:27:33+00:00

Changed the description of tep_add_plugin_path() API to reflect the
logic of the function. The suffix of plugin files is not hardcoded
to ".so", it depends on the custom plugin loader callback.

Link: https://lore.kernel.org/CAM9d7cgMgqFDvKhs6xwdBSMsaG=3ZG0RtxwgQDCTLGkML1MY4Q@mail.gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200714103027.2477584-8-tz.stoyanov@gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200716092014.2613403-8-tz.stoyanov@gmail.com

Suggested-by: Namhyung Kim 
Signed-off-by: Tzvetomir Stoyanov (VMware) 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200722011755.581468845@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

libtraceevent: Improve error handling of tep_plugin_add_option() API

2020-08-06T12:26:33+00:00

In case of memory error, ensure all allocated resources are freed.
Do not append broken option in trace_plugin_options list.

Link: https://lore.kernel.org/r/CAM9d7cizjF+fbK7YzmsBDgrx__4YAOsmEq67D3sWET8FF+YdFA@mail.gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200714103027.2477584-5-tz.stoyanov@gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200716092014.2613403-5-tz.stoyanov@gmail.com

Suggested-by: Namhyung Kim 
Signed-off-by: Tzvetomir Stoyanov (VMware) 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200722011755.158091410@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

libtraceevent: Fix typo in tep_plugin_add_option() description

2020-08-06T12:26:30+00:00

A typo "optiona" -> "optional" is fixed in description of
tep_plugin_add_option() API.

Link: https://lore.kernel.org/r/CAM9d7cizjF+fbK7YzmsBDgrx__4YAOsmEq67D3sWET8FF+YdFA@mail.gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200714103027.2477584-4-tz.stoyanov@gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200716092014.2613403-4-tz.stoyanov@gmail.com

Suggested-by: Namhyung Kim 
Signed-off-by: Tzvetomir Stoyanov (VMware) 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200722011755.014613924@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

libtraceevent: Handle strdup() error in parse_option_name()

2020-08-06T12:26:28+00:00

Modified internal function parse_option_name() to return error and
handle that error in function callers in case strdup() fails.

Link: https://lore.kernel.org/r/CAM9d7cizjF+fbK7YzmsBDgrx__4YAOsmEq67D3sWET8FF+YdFA@mail.gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200714103027.2477584-3-tz.stoyanov@gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200716092014.2613403-3-tz.stoyanov@gmail.com

Suggested-by: Namhyung Kim 
Signed-off-by: Tzvetomir Stoyanov (VMware) 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200722011754.869289038@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

libtraceevent: Document tep_load_plugins_hook()

2020-08-06T12:26:23+00:00

Add description of tep_load_plugins_hook() traceevent API. Updated
library man pages with description of the tep_load_plugins_hook() API.

Link: https://lore.kernel.org/r/CAM9d7cgLBWCrEHwz+Lhv5x5EXGcNWB0QQoeGh3OKh2JfR=dV9Q@mail.gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200714103027.2477584-2-tz.stoyanov@gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200716092014.2613403-2-tz.stoyanov@gmail.com

Suggested-by: Namhyung Kim 
Signed-off-by: Tzvetomir Stoyanov (VMware) 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200722011754.720060785@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Introduced new traceevent API, for adding new plugins directories.

2020-07-06T11:35:23+00:00

Implement new traceevent plugin API, which can be used to add new plugins
directories:

enum tep_plugin_load_priority {
	TEP_PLUGIN_FIRST,
	TEP_PLUGIN_LAST,
};

int tep_add_plugin_path(struct tep_handle *tep, char *path,
			enum tep_plugin_load_priority prio);

It adds the "path" as new plugin directory, in the context of the
handler "tep". The tep_load_plugins() API searches for plugins in this
new location. Depending of the priority "prio", the plugins from this
directory are loaded before (TEP_PLUGIN_FIRST) or after
(TEP_PLUGIN_LAST) the ordinary libtraceevent plugin locations.

Link: http://lore.kernel.org/linux-trace-devel/20191007114947.17104-2-tz.stoyanov@gmail.com
Link: http://lore.kernel.org/linux-trace-devel/20200625100516.365338-6-tz.stoyanov@gmail.com

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200702185704.248123446@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Add interface for options to plugins

2020-07-06T11:35:23+00:00

Add tep_plugin_add_option() and tep_plugin_print_options() to lib
traceevent library that allows plugins to have their own options. For
example, the function plugin by default does not print the parent, as it
uses the parent to do the indenting. The "parent" option is created by
the function plugin that will print the parent of the function like it
does in the trace file.

The tep_plugin_print_options() will print out the list of options that a
Cc: Tzvetomir Stoyanov (VMware) 
plugin has defined.

Link: http://lore.kernel.org/linux-trace-devel/20190802110101.14759-3-tz.stoyanov@gmail.com
Link: http://lore.kernel.org/linux-trace-devel/20200625100516.365338-5-tz.stoyanov@gmail.com

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200702185704.092654084@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo