From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756542Ab2IUP3W (ORCPT ); Fri, 21 Sep 2012 11:29:22 -0400 Received: from mail-gg0-f174.google.com ([209.85.161.174]:57160 "EHLO mail-gg0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753366Ab2IUP3P (ORCPT ); Fri, 21 Sep 2012 11:29:15 -0400 Date: Fri, 21 Sep 2012 08:29:05 -0700 From: Arnaldo Carvalho de Melo To: irina.tirdea@gmail.com Cc: mingo@redhat.com, a.p.zijlstra@chello.nl, rostedt@goodmis.org, paulus@samba.org, dsahern@gmail.com, namhyung.kim@lge.com, linux-kernel@vger.kernel.org, masami.hiramatsu.pt@hitachi.com, Irina Tirdea Subject: Re: [PATCH v2 1/1] perf tools: remove sscanf extension %as Message-ID: <20120921152905.GA22954@ghostprotocols.net> References: <1347574063-22521-2-git-send-email-irina.tirdea@intel.com> <1348173470-4936-1-git-send-email-irina.tirdea@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1348173470-4936-1-git-send-email-irina.tirdea@gmail.com> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Thu, Sep 20, 2012 at 11:37:50PM +0300, irina.tirdea@gmail.com escreveu: > From: Irina Tirdea > > perf uses sscanf extension %as to read and allocate a > string in the same step. This is a non-standard extension > only present in new versions of glibc. > > Replacing the use of sscanf and %as with strtok_r calls > in order to parse a given string into its components. > This is needed in Android since bionic does not support > %as extension for sscanf. Masami, can I have your Acked-by or even a Tested-by? - Arnaldo > Signed-off-by: Irina Tirdea > --- > tools/perf/util/probe-event.c | 36 ++++++++++++++++++++++++++++------- > tools/perf/util/trace-event-parse.c | 18 ++++++++---------- > 2 files changed, 37 insertions(+), 17 deletions(-) > > diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c > index 4ce04c2..49a256e 100644 > --- a/tools/perf/util/probe-event.c > +++ b/tools/perf/util/probe-event.c > @@ -1100,6 +1100,7 @@ static int parse_probe_trace_command(const char *cmd, > struct probe_trace_point *tp = &tev->point; > char pr; > char *p; > + char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str; > int ret, i, argc; > char **argv; > > @@ -1116,14 +1117,27 @@ static int parse_probe_trace_command(const char *cmd, > } > > /* Scan event and group name. */ > - ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]", > - &pr, (float *)(void *)&tev->group, > - (float *)(void *)&tev->event); > - if (ret != 3) { > + argv0_str = strdup(argv[0]); > + if (argv0_str == NULL) { > + ret = -ENOMEM; > + goto out; > + } > + fmt1_str = strtok_r(argv0_str, ":", &fmt); > + fmt2_str = strtok_r(NULL, "/", &fmt); > + fmt3_str = strtok_r(NULL, " \t", &fmt); > + if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL > + || fmt3_str == NULL) { > semantic_error("Failed to parse event name: %s\n", argv[0]); > ret = -EINVAL; > goto out; > } > + pr = fmt1_str[0]; > + tev->group = strdup(fmt2_str); > + tev->event = strdup(fmt3_str); > + if (tev->group == NULL || tev->event == NULL) { > + ret = -ENOMEM; > + goto out; > + } > pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr); > > tp->retprobe = (pr == 'r'); > @@ -1135,10 +1149,17 @@ static int parse_probe_trace_command(const char *cmd, > p++; > } else > p = argv[1]; > - ret = sscanf(p, "%a[^+]+%lu", (float *)(void *)&tp->symbol, > - &tp->offset); > - if (ret == 1) > + fmt1_str = strtok_r(p, "+", &fmt); > + tp->symbol = strdup(fmt1_str); > + if (tp->symbol == NULL) { > + ret = -ENOMEM; > + goto out; > + } > + fmt2_str = strtok_r(NULL, "", &fmt); > + if (fmt2_str == NULL) > tp->offset = 0; > + else > + tp->offset = strtoul(fmt2_str, NULL, 10); > > tev->nargs = argc - 2; > tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs); > @@ -1162,6 +1183,7 @@ static int parse_probe_trace_command(const char *cmd, > } > ret = 0; > out: > + free(argv0_str); > argv_free(argv); > return ret; > } > diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c > index aa4c860..3aabcd6 100644 > --- a/tools/perf/util/trace-event-parse.c > +++ b/tools/perf/util/trace-event-parse.c > @@ -229,24 +229,22 @@ void parse_proc_kallsyms(struct pevent *pevent, > char *next = NULL; > char *addr_str; > char *mod; > - char ch; > + char *fmt; > > line = strtok_r(file, "\n", &next); > while (line) { > mod = NULL; > - sscanf(line, "%as %c %as\t[%as", > - (float *)(void *)&addr_str, /* workaround gcc warning */ > - &ch, (float *)(void *)&func, (float *)(void *)&mod); > + addr_str = strtok_r(line, " ", &fmt); > addr = strtoull(addr_str, NULL, 16); > - free(addr_str); > - > - /* truncate the extra ']' */ > + /* skip character */ > + strtok_r(NULL, " ", &fmt); > + func = strtok_r(NULL, "\t", &fmt); > + mod = strtok_r(NULL, "]", &fmt); > + /* truncate the extra '[' */ > if (mod) > - mod[strlen(mod) - 1] = 0; > + mod = mod + 1; > > pevent_register_function(pevent, func, addr, mod); > - free(func); > - free(mod); > > line = strtok_r(NULL, "\n", &next); > } > -- > 1.7.9.5