From c877bbd8eceb14c5eac6779cc804fa8b34044736 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Tue, 3 Dec 2013 14:09:16 +0100 Subject: tools lib traceevent: Add plugin support Backporting plugin support for traceevent lib. Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb): git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git It's now possible to use following interface to load plugins (shared objects) to enhance pevent object functionality. The plugin interface/hooks are as follows: (taken from event-parse.h comments) - 'pevent_plugin_loader' (required) The function name to initialized the plugin. int pevent_plugin_loader(struct pevent *pevent) - 'pevent_plugin_unloader' (optional) The function called just before unloading int pevent_plugin_unloader(void) - 'pevent_plugin_options' (optional) Plugin options that can be set before loading struct plugin_option pevent_plugin_options[] = { { .name = "option-name", .plugin_alias = "overide-file-name", (optional) .description = "description of option to show users", }, { .name = NULL, }, }; Array must end with .name = NULL; The plugin_alias (below) can be used to give a shorter name to access the variable. Useful if a plugin handles more than one event. NOTE options support is not backported yet. - 'pevent_plugin_alias' (optional) The name to use for finding options (uses filename if not defined) New traceevent functions are added to search and load available plugins: struct plugin_list* traceevent_load_plugins(struct pevent *pevent) - loads plusing for 'struct pevent' object and returns loaded plugins list void traceevent_unload_plugins(struct plugin_list *plugin_list); - unload plugin list Signed-off-by: Jiri Olsa Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1386076182-14484-3-git-send-email-jolsa@redhat.com Signed-off-by: Steven Rostedt Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/Makefile | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'tools/lib/traceevent/Makefile') diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile index fc1502098595..2ccb5bc800e8 100644 --- a/tools/lib/traceevent/Makefile +++ b/tools/lib/traceevent/Makefile @@ -180,7 +180,11 @@ $(obj)/%.o: $(src)/%.c %.o: $(src)/%.c $(Q)$(call do_compile) -PEVENT_LIB_OBJS = event-parse.o trace-seq.o parse-filter.o parse-utils.o +PEVENT_LIB_OBJS = event-parse.o +PEVENT_LIB_OBJS += event-plugin.o +PEVENT_LIB_OBJS += trace-seq.o +PEVENT_LIB_OBJS += parse-filter.o +PEVENT_LIB_OBJS += parse-utils.o PEVENT_LIB_OBJS += kbuffer-parse.o ALL_OBJS = $(PEVENT_LIB_OBJS) -- cgit v1.2.3