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

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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) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200702185704.248123446@goodmis.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Tzvetomir Stoyanov (VMware)
2020-07-02 14:53:49 -04:00
committed by Arnaldo Carvalho de Melo
parent 74006289cf
commit 4d70caefd0
4 changed files with 82 additions and 1 deletions
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5
tools/lib/traceevent/event-parse-local.h
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@@ -13,6 +13,7 @@ struct func_map;
struct func_list;
struct event_handler;
struct func_resolver;
struct tep_plugins_dir;
struct tep_handle {
int ref_count;
@@ -47,7 +48,6 @@ struct tep_handle {
struct printk_list *printklist;
unsigned int printk_count;
struct tep_event **events;
int nr_events;
struct tep_event **sort_events;
@@ -81,10 +81,13 @@ struct tep_handle {
/* cache */
struct tep_event *last_event;
struct tep_plugins_dir *plugins_dir;
};
void tep_free_event(struct tep_event *event);
void tep_free_format_field(struct tep_format_field *field);
void tep_free_plugin_paths(struct tep_handle *tep);
unsigned short tep_data2host2(struct tep_handle *tep, unsigned short data);
unsigned int tep_data2host4(struct tep_handle *tep, unsigned int data);