linux-stable.git/tools/lib/traceevent/event-plugin.c, branch v4.19.78

libtraceevent: Change users plugin directory

2019-10-05T11:09:53+00:00

[ Upstream commit e97fd1383cd77c467d2aed7fa4e596789df83977 ]

To be compliant with XDG user directory layout, the user's plugin
directory is changed from ~/.traceevent/plugins to
~/.local/lib/traceevent/plugins/

Suggested-by: Patrick McLean 
Signed-off-by: Tzvetomir Stoyanov 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Patrick McLean 
Cc: linux-trace-devel@vger.kernel.org
Link: https://lore.kernel.org/linux-trace-devel/20190313144206.41e75cf8@patrickm/
Link: http://lore.kernel.org/linux-trace-devel/20190801074959.22023-4-tz.stoyanov@gmail.com
Link: http://lore.kernel.org/lkml/20190805204355.344622683@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

tools lib traceevent: Change to SPDX License format

2018-08-20T11:54:58+00:00

Replace the GPL text with SPDX tags in the tools/lib/traceevent files.

Signed-off-by: Steven Rostedt 
Cc: Jiri Olsa 
Cc: Tzvetomir Stoyanov (VMware) 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180816111015.125e0f25@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename traceevent_plugin_* APIs

2018-08-13T18:25:36+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "traceevent_". This changes
APIs: traceevent_plugin_list_options, traceevent_plugin_free_options_list,
traceevent_plugin_add_options, traceevent_plugin_remove_options,
traceevent_print_plugins

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180702.089951638@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename 'enum pevent_flag' to 'enum tep_flag'

2018-08-13T18:22:18+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
pevent_get_page_size API and enum pevent_flag to enum tep_flag

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180701.623942406@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename traceevent_* APIs

2018-08-13T18:22:16+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "traceevent_". This
changes APIs: traceevent_host_bigendian, traceevent_load_plugins and
traceevent_unload_plugins

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180701.484691639@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename pevent plugin related APIs

2018-08-13T18:21:39+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
the pevent plugin related API.

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180700.005287044@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename struct pevent to struct tep_handle

2018-08-10T18:29:35+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
the struct pevent to struct tep_handle.

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180659.706175783@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Use asprintf when possible

2018-01-17T13:22:19+00:00

It makes the code clearer and less error prone.

clearer:
- less code
- the code is now using the same format to create strings dynamically

less error prone:
- no magic number +2 +9 +5 to compute the size
- no copy&paste of the strings to compute the size and to concatenate

The function `asprintf` is not POSIX standard but the program
was already using it. Later it can be decided to use only POSIX
functions, then we can easly replace all the `asprintf(3)` with a local
implementation of that function.

Signed-off-by: Federico Vaga 
Acked-by: Namhyung Kim 
Cc: Andrew Morton 
Cc: Federico Vaga 
Link: http://lkml.kernel.org/r/20170802221558.9684-2-federico.vaga@vaga.pv.it
Link: http://lkml.kernel.org/r/20180112004822.686281649@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Make plugin options either string or boolean

2015-03-24T15:20:09+00:00

When a plugin option is defined, by default it is a boolean (true or false).

If the option is something else, then it needs to set its "value" field to
a default string other than NULL (can be just "").

If the value is not set then the option is considered boolean, and the
updating of the option value will be handled accordingly.

Signed-off-by: Steven Rostedt 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: http://lkml.kernel.org/r/20150324135923.308372986@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent: Add options to plugins

2014-06-07T21:33:36+00:00

The traceevent plugins allows developers to have their events print out
information that is more advanced than what can be achieved by the
trace event format files.

As these plugins are used on the userspace side of the tracing tools, it
is only logical that the tools should be able to produce different types
of output for the events. The types of events still need to be defined by
the plugins thus we need a way to pass information from the tool to the
plugin to specify what type of information to be shown.

Not only does the information need to be passed by the tool to plugin, but
the plugin also requires a way to notify the tool of what options it can
provide.

This builds the plugin option infrastructure that is taken from trace-cmd
that is used to allow plugins to produce different output based on the
options specified by the tool.

Signed-off-by: Steven Rostedt 
Acked-by: Namhyung Kim 
Link: http://lkml.kernel.org/r/20140603184154.0a4c031c@gandalf.local.home
Signed-off-by: Jiri Olsa