From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89494C5DF60 for ; Thu, 7 Nov 2019 22:15:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 495A62166E for ; Thu, 7 Nov 2019 22:15:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="VEe+Gbab" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727827AbfKGWO5 (ORCPT ); Thu, 7 Nov 2019 17:14:57 -0500 Received: from mail-pf1-f201.google.com ([209.85.210.201]:55874 "EHLO mail-pf1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727794AbfKGWO4 (ORCPT ); Thu, 7 Nov 2019 17:14:56 -0500 Received: by mail-pf1-f201.google.com with SMTP id u21so2978308pfm.22 for ; Thu, 07 Nov 2019 14:14:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=TexSPagk/qPWLXB1RzSvRc/jlf08CXbHxdJXlTnMvco=; b=VEe+GbabvUQUCGQjQ0cFSPK/EMivJNfRV8phevAWwMQiHTIm2czJ1ctKmXYBOuDc3O JOUu0hFanG4X8lhfg5uBa19ZrBwMD1xEkqHTxrUZRnKopNnWYlhDqtyUhDrsU3V8Jlif ixU1rD365kH+9baQvNinFjVOn+lqaiiZsBCHLAtvnJlmLSlFW6/OpArU38Ngz+zbdl61 R0G/pnr/irlpLi70s/RVye6iOH0QTON41Qieru+j0XVJIGVU7kMmmjXQp77/HNWKtlRe BHq22/7qwzfeDKwmJPwGJRls0aJYCz9pWXPUMBPf165vVxtVomm2TRTKCxvSjN0Nw1qt f0FQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=TexSPagk/qPWLXB1RzSvRc/jlf08CXbHxdJXlTnMvco=; b=SSrwCiOou9wFoSbIEdRXejpAX1Rk6P7RojSLA+wdkQlOIqxguwEiMMoND0VEU0JHtV Iaa7Hc9iYCM5OtEDGeJS5kLjrC3Cl1liBnZOhttJ2aqOVJUQYYLqXh/5jlhjdtmpWyHn Qu3n12cEJrKNj0NvQeb0t2bbzOcts2pcKs6Qi1CKWfBYemukFE6EvpLiG479pvg24pxs rrtrTZZZPKk68wXT5u+2wjwf6dqTrJ4UkTtYmwO4wvI4bciTxBd1SFlXG6Vj70XNrpYQ 68W0eL5Fcw+F6l4HRdj3TKGnog5NowlXoHiwKs06EMdh8WutoPGniP7vSjs2ke/Zr95E DMvQ== X-Gm-Message-State: APjAAAVBBIPhXW9SDIadluF4qsRQEzweuQlTjRmHwOmg5gVbfjP0vWjr e4kPkKeALHRYdZqv/AMvVKPYuYsBku1H X-Google-Smtp-Source: APXvYqyG8V+eCsVX20ca+Wic+DKWJe5wpasiGhn90ZTqB0FeX9VNDqtcpQKogQ000xsOdPfwYhAuYfersV6L X-Received: by 2002:a63:eb47:: with SMTP id b7mr7374005pgk.179.1573164894908; Thu, 07 Nov 2019 14:14:54 -0800 (PST) Date: Thu, 7 Nov 2019 14:14:23 -0800 In-Reply-To: <20191107221428.168286-1-irogers@google.com> Message-Id: <20191107221428.168286-6-irogers@google.com> Mime-Version: 1.0 References: <20191030223448.12930-1-irogers@google.com> <20191107221428.168286-1-irogers@google.com> X-Mailer: git-send-email 2.24.0.432.g9d3f5f5b63-goog Subject: [PATCH v6 05/10] perf tools: ensure config and str in terms are unique From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andi Kleen , Jin Yao , Adrian Hunter , Kan Liang , John Garry , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, clang-built-linux@googlegroups.com Cc: Stephane Eranian , Ian Rogers Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Make it easier to release memory associated with parse event terms by duplicating the string for the config name and ensuring the val string is a duplicate. Currently the parser may memory leak terms and this is addressed in a later patch. Signed-off-by: Ian Rogers --- tools/perf/util/parse-events.c | 51 ++++++++++++++++++++++++++++------ tools/perf/util/parse-events.y | 4 ++- 2 files changed, 45 insertions(+), 10 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 03e54a2d8685..578288c94d2a 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1412,7 +1412,6 @@ int parse_events_add_pmu(struct parse_events_state *parse_state, int parse_events_multi_pmu_add(struct parse_events_state *parse_state, char *str, struct list_head **listp) { - struct list_head *head; struct parse_events_term *term; struct list_head *list; struct perf_pmu *pmu = NULL; @@ -1429,19 +1428,30 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state, list_for_each_entry(alias, &pmu->aliases, list) { if (!strcasecmp(alias->name, str)) { + struct list_head *head; + char *config; + head = malloc(sizeof(struct list_head)); if (!head) return -1; INIT_LIST_HEAD(head); - if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER, - str, 1, false, &str, NULL) < 0) + config = strdup(str); + if (!config) + return -1; + if (parse_events_term__num(&term, + PARSE_EVENTS__TERM_TYPE_USER, + config, 1, false, &config, + NULL) < 0) { + free(list); + free(config); return -1; + } list_add_tail(&term->list, head); if (!parse_events_add_pmu(parse_state, list, pmu->name, head, true, true)) { - pr_debug("%s -> %s/%s/\n", str, + pr_debug("%s -> %s/%s/\n", config, pmu->name, alias->str); ok++; } @@ -1450,8 +1460,10 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state, } } } - if (!ok) + if (!ok) { + free(list); return -1; + } *listp = list; return 0; } @@ -2746,30 +2758,51 @@ int parse_events_term__sym_hw(struct parse_events_term **term, char *config, unsigned idx) { struct event_symbol *sym; + char *str; struct parse_events_term temp = { .type_val = PARSE_EVENTS__TERM_TYPE_STR, .type_term = PARSE_EVENTS__TERM_TYPE_USER, - .config = config ?: (char *) "event", + .config = config, }; + if (!temp.config) { + temp.config = strdup("event"); + if (!temp.config) + return -ENOMEM; + } BUG_ON(idx >= PERF_COUNT_HW_MAX); sym = &event_symbols_hw[idx]; - return new_term(term, &temp, (char *) sym->symbol, 0); + str = strdup(sym->symbol); + if (!str) + return -ENOMEM; + return new_term(term, &temp, str, 0); } int parse_events_term__clone(struct parse_events_term **new, struct parse_events_term *term) { + char *str; struct parse_events_term temp = { .type_val = term->type_val, .type_term = term->type_term, - .config = term->config, + .config = NULL, .err_term = term->err_term, .err_val = term->err_val, }; - return new_term(new, &temp, term->val.str, term->val.num); + if (term->config) { + temp.config = strdup(term->config); + if (!temp.config) + return -ENOMEM; + } + if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM) + return new_term(new, &temp, NULL, term->val.num); + + str = strdup(term->val.str); + if (!str) + return -ENOMEM; + return new_term(new, &temp, str, 0); } int parse_events_copy_term_list(struct list_head *old, diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y index ffa1a1b63796..545ab7cefc20 100644 --- a/tools/perf/util/parse-events.y +++ b/tools/perf/util/parse-events.y @@ -665,9 +665,11 @@ PE_NAME array '=' PE_VALUE PE_DRV_CFG_TERM { struct parse_events_term *term; + char *config = strdup($1); + ABORT_ON(!config); ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_DRV_CFG, - $1, $1, &@1, NULL)); + config, $1, &@1, NULL)); $$ = term; } -- 2.24.0.432.g9d3f5f5b63-goog