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[209.132.180.67]) by mx.google.com with ESMTP id rt5si16248957pab.98.2016.02.19.04.06.43; Fri, 19 Feb 2016 04:06:43 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1428085AbcBSMGl (ORCPT + 30 others); Fri, 19 Feb 2016 07:06:41 -0500 Received: from szxga01-in.huawei.com ([58.251.152.64]:17118 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1947102AbcBSLqp (ORCPT ); Fri, 19 Feb 2016 06:46:45 -0500 Received: from 172.24.1.47 (EHLO szxeml434-hub.china.huawei.com) ([172.24.1.47]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DEW30856; Fri, 19 Feb 2016 19:45:08 +0800 (CST) Received: from linux-4hy3.site (10.107.193.248) by szxeml434-hub.china.huawei.com (10.82.67.225) with Microsoft SMTP Server id 14.3.235.1; Fri, 19 Feb 2016 19:45:00 +0800 From: Wang Nan To: Alexei Starovoitov , Arnaldo Carvalho de Melo , Arnaldo Carvalho de Melo , Brendan Gregg CC: Adrian Hunter , Cody P Schafer , "David S. Miller" , He Kuang , =?UTF-8?q?J=C3=A9r=C3=A9mie=20Galarneau?= , Jiri Olsa , Kirill Smelkov , Li Zefan , Masami Hiramatsu , Namhyung Kim , Peter Zijlstra , , Wang Nan , Subject: [PATCH 10/55] perf stat: Forbid user passing improper config terms Date: Fri, 19 Feb 2016 11:43:58 +0000 Message-ID: <1455882283-79592-11-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1455882283-79592-1-git-send-email-wangnan0@huawei.com> References: <1455882283-79592-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.56C70045.00A4, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 366d8c95664d28fa27cfbdfd75a8c341 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 'perf stat' accepts some config terms but doesn't apply them. For example: # perf stat -e 'instructions/no-inherit/' -e 'instructions/inherit/' bash # ls # exit Performance counter stats for 'bash': 266258061 instructions/no-inherit/ 266258061 instructions/inherit/ 1.402183915 seconds time elapsed The result is confusing, because user may expect the first 'instructions' event exclude the 'ls' command. This patch forbid most of these config terms for 'perf stat'. Result: # ./perf stat -e 'instructions/no-inherit/' -e 'instructions/inherit/' bash event syntax error: 'instructions/no-inherit/' \___ 'no-inherit' is not usable in 'perf stat' ... We can add blocked config terms back when 'perf stat' really supports them. This patch also removes unavailable config term from error message: # ./perf stat -e 'instructions/badterm/' ls event syntax error: 'instructions/badterm/' \___ unknown term valid terms: config,config1,config2,name # ./perf stat -e 'cpu/badterm/' ls event syntax error: 'cpu/badterm/' \___ unknown term valid terms: pc,any,inv,edge,cmask,event,in_tx,ldlat,umask,in_tx_cp,offcore_rsp,config,config1,config2,name Signed-off-by: Wang Nan Cc: He Kuang Cc: Jiri Olsa Cc: Alexei Starovoitov Cc: Arnaldo Carvalho de Melo Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com --- tools/perf/builtin-stat.c | 1 + tools/perf/util/parse-events.c | 48 ++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/parse-events.h | 1 + 3 files changed, 50 insertions(+) -- 1.8.3.4 diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 86289df..8c0bc0f 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1831,6 +1831,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused) if (evsel_list == NULL) return -ENOMEM; + parse_events__shrink_config_terms(); argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, (const char **) stat_usage, PARSE_OPT_STOP_AT_NON_OPTION); diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 3fe0d11..5b8a13b 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -816,6 +816,41 @@ static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = { [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit", }; +static bool config_term_shrinked; + +static bool +config_term_avail(int term_type, struct parse_events_error *err) +{ + if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) { + err->str = strdup("Invalid term_type"); + return false; + } + if (!config_term_shrinked) + return true; + + switch (term_type) { + case PARSE_EVENTS__TERM_TYPE_CONFIG: + case PARSE_EVENTS__TERM_TYPE_CONFIG1: + case PARSE_EVENTS__TERM_TYPE_CONFIG2: + case PARSE_EVENTS__TERM_TYPE_NAME: + return true; + default: + if (!err) + return false; + + /* term_type is validated so indexing is safe */ + if (asprintf(&err->str, "'%s' is not usable in 'perf stat'", + config_term_names[term_type]) < 0) + err->str = NULL; + return false; + } +} + +void parse_events__shrink_config_terms(void) +{ + config_term_shrinked = true; +} + typedef int config_term_func_t(struct perf_event_attr *attr, struct parse_events_term *term, struct parse_events_error *err); @@ -885,6 +920,17 @@ do { \ return -EINVAL; } + /* + * Check term availbility after basic checking so + * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered. + * + * If check availbility at the entry of this function, + * user will see "'' is not usable in 'perf stat'" + * if an invalid config term is provided for legacy events + * (for example, instructions/badterm/...), which is confusing. + */ + if (!config_term_avail(term->type_term, err)) + return -EINVAL; return 0; #undef CHECK_TYPE_VAL } @@ -2177,6 +2223,8 @@ static void config_terms_list(char *buf, size_t buf_sz) for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) { const char *name = config_term_names[i]; + if (!config_term_avail(i, NULL)) + continue; if (!name) continue; if (name[0] == '<') diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index 2196db9..b6afc57 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -106,6 +106,7 @@ struct parse_events_terms { struct list_head *terms; }; +void parse_events__shrink_config_terms(void); int parse_events__is_hardcoded_term(struct parse_events_term *term); int parse_events_term__num(struct parse_events_term **term, int type_term, char *config, u64 num,