linux/tools/lib/traceevent/event-parse.h

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22 KiB

perf tools: Use __maybe_used for unused variables perf defines both __used and __unused variables to use for marking unused variables. The variable __used is defined to __attribute__((__unused__)), which contradicts the kernel definition to __attribute__((__used__)) for new gcc versions. On Android, __used is also defined in system headers and this leads to warnings like: warning: '__used__' attribute ignored __unused is not defined in the kernel and is not a standard definition. If __unused is included everywhere instead of __used, this leads to conflicts with glibc headers, since glibc has a variables with this name in its headers. The best approach is to use __maybe_unused, the definition used in the kernel for __attribute__((unused)). In this way there is only one definition in perf sources (instead of 2 definitions that point to the same thing: __used and __unused) and it works on both Linux and Android. This patch simply replaces all instances of __used and __unused with __maybe_unused. Signed-off-by: Irina Tirdea <irina.tirdea@intel.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1347315303-29906-7-git-send-email-irina.tirdea@intel.com [ committer note: fixed up conflict with a116e05 in builtin-sched.c ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-09-11 01:15:03 +03:00
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 <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1386076182-14484-3-git-send-email-jolsa@redhat.com Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2013-12-03 14:09:16 +01:00
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 <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1386076182-14484-3-git-send-email-jolsa@redhat.com Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2013-12-03 14:09:16 +01:00