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 04FDFCA9EAF for ; Thu, 24 Oct 2019 19:03:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C4C832070B for ; Thu, 24 Oct 2019 19:03:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="t7KJKTpn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437219AbfJXTDE (ORCPT ); Thu, 24 Oct 2019 15:03:04 -0400 Received: from mail-pg1-f202.google.com ([209.85.215.202]:43688 "EHLO mail-pg1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2504272AbfJXTCQ (ORCPT ); Thu, 24 Oct 2019 15:02:16 -0400 Received: by mail-pg1-f202.google.com with SMTP id i4so12551493pgh.10 for ; Thu, 24 Oct 2019 12:02:15 -0700 (PDT) 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=+BLwqukjEjSzyRsrVOMoR9T3IlY0GDPVz6roAVxq3yY=; b=t7KJKTpnHF3ZC04GAfov7AIuzmHbGyRQPlZ9mNgn4WFbdmAzVeA3ChR9XF+XttPnTf 75zhk2kZQS2H08vWZ0KAjkFIC8V9IkLKQpluChH+lg/MnJuKr5kCVY9jw5PIOMNuUG0v anCFzMEgznP21uSnkF6N+V6o/0oK5xhEfGJh11ocATY8YuykY+p/p+swR8vkKlsRnfLB tK7un0pAXk7/PR1+clMIhuk9I3sOOVftIxSWxeoxvfFn4oUhFZIpVGQTeMahrHAXmAJ9 tWCiLish5zUvhxogmHs2c/n+8gLy3wvOevOQOoU0z4JrHSf1zsOhHgFYlXTgrTerzBGJ K+Tw== 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=+BLwqukjEjSzyRsrVOMoR9T3IlY0GDPVz6roAVxq3yY=; b=nenclxzmqRMIr/EzeDry0ulW/FsshMIn7uWzfCJtbu6+uvPUlLiK4YNPAiPm9hfXBU pyn8tfa2dOThw3jusf9RImGW/yJKlcJwUOMVuWpWRJC0Icw/FK4AKGyxbwIYQ8IrBD63 eZX9U3n6F4oebr03yxvHZ4y8cry3ttlL/z/xHxtUIyJw8PiRF0sq9HiBcSro1IgflkeF Jj8jjqDrcWdqyWR20Q8BOaEIEI1AkwUztLcEYw4eyyBEsxMqv3xxSTKdVjqIndYIzL0W qSooX7/mLu5u0LioxmuCJF05ycXqy+zjBbCo1ENKKK4m71We+Rh/pPLD1bh5ZwBvdI2A ZYRw== X-Gm-Message-State: APjAAAWxE58dnvZh928UP0whazzdDNGVRfTHWPo7t3XGrspVWN8xstTZ oeAOrZHL/LMGfeyvWhGvJa80vAhY/U28 X-Google-Smtp-Source: APXvYqzxIMOjHfrLCzoADHIQ+vCqU6Dp5CTsgb4D41Uy4S5lE49mdz54PDDtLJ3H/apOgnqz2EcWiMrex7l0 X-Received: by 2002:a63:7218:: with SMTP id n24mr5945150pgc.100.1571943735169; Thu, 24 Oct 2019 12:02:15 -0700 (PDT) Date: Thu, 24 Oct 2019 12:01:56 -0700 In-Reply-To: <20191024190202.109403-1-irogers@google.com> Message-Id: <20191024190202.109403-4-irogers@google.com> Mime-Version: 1.0 References: <20191023005337.196160-1-irogers@google.com> <20191024190202.109403-1-irogers@google.com> X-Mailer: git-send-email 2.23.0.866.gb869b98d4c-goog Subject: [PATCH v3 3/9] 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: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@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 f0d50f079d2f..dc5862a663b5 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1430,7 +1430,6 @@ 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; @@ -1447,19 +1446,30 @@ 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++; } @@ -1468,8 +1478,10 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state, } } } - if (!ok) + if (!ok) { + free(list); return -1; + } *listp = list; return 0; } @@ -2764,30 +2776,51 @@ 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 48126ae4cd13..27d6b187c9b1 100644 --- a/tools/perf/util/parse-events.y +++ b/tools/perf/util/parse-events.y @@ -644,9 +644,11 @@ 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; } -- 2.23.0.866.gb869b98d4c-goog