From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757219Ab2IXQEL (ORCPT ); Mon, 24 Sep 2012 12:04:11 -0400 Received: from casper.infradead.org ([85.118.1.10]:41454 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756687Ab2IXQAA (ORCPT ); Mon, 24 Sep 2012 12:00:00 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Stephane Eranian , Steven Rostedt Subject: [PATCH 27/30] tools lib traceevent: Carve out events format parsing routine Date: Mon, 24 Sep 2012 12:59:41 -0300 Message-Id: <1348502384-14442-28-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.7.9.2.358.g22243 In-Reply-To: <1348502384-14442-1-git-send-email-acme@infradead.org> References: <1348502384-14442-1-git-send-email-acme@infradead.org> Content-Type: text/plain; charset="UTF-8" X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnaldo Carvalho de Melo The pevent_parse_event() routine will parse a events/sys/tp/format file and add an event_format instance to the pevent struct. This patch introduces a pevent_parse_format() routine with just the bits needed to parse the event/sys/tp/format file and just return the event_format instance, useful for when all we want is to parse the format file, without requiring the pevent struct. Acked-by: Steven Rostedt Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Steven Rostedt Link: http://lkml.kernel.org/n/tip-lge0afl47arh86om0m6a5bqr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/event-parse.c | 96 +++++++++++++++++++++++++++--------- tools/lib/traceevent/event-parse.h | 3 + 2 files changed, 75 insertions(+), 24 deletions(-) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index b3bc130..1fa71ca 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -4794,8 +4794,7 @@ static int find_event_handle(struct pevent *pevent, struct event_format *event) } /** - * pevent_parse_event - parse the event format - * @pevent: the handle to the pevent + * __pevent_parse_format - parse the event format * @buf: the buffer storing the event format string * @size: the size of @buf * @sys: the system the event belongs to @@ -4807,15 +4806,16 @@ static int find_event_handle(struct pevent *pevent, struct event_format *event) * * /sys/kernel/debug/tracing/events/.../.../format */ -enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, - unsigned long size, const char *sys) +enum pevent_errno __pevent_parse_format(struct event_format **eventp, + struct pevent *pevent, const char *buf, + unsigned long size, const char *sys) { struct event_format *event; int ret; init_input_buf(buf, size); - event = alloc_event(); + *eventp = event = alloc_event(); if (!event) return PEVENT_ERRNO__MEM_ALLOC_FAILED; @@ -4849,9 +4849,6 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, goto event_alloc_failed; } - /* Add pevent to event so that it can be referenced */ - event->pevent = pevent; - ret = event_read_format(event); if (ret < 0) { ret = PEVENT_ERRNO__READ_FORMAT_FAILED; @@ -4862,19 +4859,16 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, * If the event has an override, don't print warnings if the event * print format fails to parse. */ - if (find_event_handle(pevent, event)) + if (pevent && find_event_handle(pevent, event)) show_warning = 0; ret = event_read_print(event); + show_warning = 1; + if (ret < 0) { - show_warning = 1; ret = PEVENT_ERRNO__READ_PRINT_FAILED; goto event_parse_failed; } - show_warning = 1; - - if (add_event(pevent, event)) - goto event_alloc_failed; if (!ret && (event->flags & EVENT_FL_ISFTRACE)) { struct format_field *field; @@ -4898,24 +4892,78 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, return 0; } -#define PRINT_ARGS 0 - if (PRINT_ARGS && event->print_fmt.args) - print_args(event->print_fmt.args); - return 0; event_parse_failed: event->flags |= EVENT_FL_FAILED; - /* still add it even if it failed */ - if (add_event(pevent, event)) - goto event_alloc_failed; - return ret; event_alloc_failed: free(event->system); free(event->name); free(event); + *eventp = NULL; + return ret; +} + +/** + * pevent_parse_format - parse the event format + * @buf: the buffer storing the event format string + * @size: the size of @buf + * @sys: the system the event belongs to + * + * This parses the event format and creates an event structure + * to quickly parse raw data for a given event. + * + * These files currently come from: + * + * /sys/kernel/debug/tracing/events/.../.../format + */ +enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf, + unsigned long size, const char *sys) +{ + return __pevent_parse_format(eventp, NULL, buf, size, sys); +} + +/** + * pevent_parse_event - parse the event format + * @pevent: the handle to the pevent + * @buf: the buffer storing the event format string + * @size: the size of @buf + * @sys: the system the event belongs to + * + * This parses the event format and creates an event structure + * to quickly parse raw data for a given event. + * + * These files currently come from: + * + * /sys/kernel/debug/tracing/events/.../.../format + */ +enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, + unsigned long size, const char *sys) +{ + struct event_format *event = NULL; + int ret = __pevent_parse_format(&event, pevent, buf, size, sys); + + if (event == NULL) + return ret; + + /* Add pevent to event so that it can be referenced */ + event->pevent = pevent; + + if (add_event(pevent, event)) + goto event_add_failed; + +#define PRINT_ARGS 0 + if (PRINT_ARGS && event->print_fmt.args) + print_args(event->print_fmt.args); + + return 0; + +event_add_failed: + free(event->system); + free(event->name); + free(event); return ret; } @@ -5365,7 +5413,7 @@ static void free_formats(struct format *format) free_format_fields(format->fields); } -static void free_event(struct event_format *event) +void pevent_free_format(struct event_format *event) { free(event->name); free(event->system); @@ -5451,7 +5499,7 @@ void pevent_free(struct pevent *pevent) } for (i = 0; i < pevent->nr_events; i++) - free_event(pevent->events[i]); + pevent_free_format(pevent->events[i]); while (pevent->handlers) { handle = pevent->handlers; diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index a4bbe24..24a4bba 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -540,6 +540,9 @@ int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long siz enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, unsigned long size, const char *sys); +enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf, + unsigned long size, const char *sys); +void pevent_free_format(struct event_format *event); void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event, const char *name, struct pevent_record *record, -- 1.7.1