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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 6BCD4C48BC2 for ; Mon, 21 Jun 2021 15:05:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5690B610C7 for ; Mon, 21 Jun 2021 15:05:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230512AbhFUPIC (ORCPT ); Mon, 21 Jun 2021 11:08:02 -0400 Received: from mga02.intel.com ([134.134.136.20]:58587 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230423AbhFUPHu (ORCPT ); Mon, 21 Jun 2021 11:07:50 -0400 IronPort-SDR: SFbLS8GZk1Uixoy9u2Q181FgIGYmcajngkMVJBaEioVh7h2swALeHpflUhc3pVbergg0Kp2tvr 8wfHyChrALyg== X-IronPort-AV: E=McAfee;i="6200,9189,10022"; a="193998987" X-IronPort-AV: E=Sophos;i="5.83,289,1616482800"; d="scan'208";a="193998987" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2021 08:05:34 -0700 IronPort-SDR: P0a/YXa1/SzlVpAEpaN+PV4sj9FANBqevN2482jk2KoRV9v83PQ/79h+OxS+iFKiqL/Hu5TbZs 5tlVf6Z/5JdA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.83,289,1616482800"; d="scan'208";a="486519627" Received: from ahunter-desktop.fi.intel.com ([10.237.72.79]) by orsmga001.jf.intel.com with ESMTP; 21 Jun 2021 08:05:31 -0700 From: Adrian Hunter To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , Andi Kleen , Peter Zijlstra , Ingo Molnar , Mark Rutland , Namhyung Kim , Leo Yan , Kan Liang , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC 11/11] perf dlfilter: Add object_code() to perf_dlfilter_fns Date: Mon, 21 Jun 2021 18:05:14 +0300 Message-Id: <20210621150514.32159-12-adrian.hunter@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210621150514.32159-1-adrian.hunter@intel.com> References: <20210621150514.32159-1-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a function, for use by dlfilters, to read object code. Signed-off-by: Adrian Hunter --- tools/perf/Documentation/perf-dlfilter.txt | 5 +++- tools/perf/util/dlfilter.c | 34 ++++++++++++++++++++++ tools/perf/util/perf_dlfilter.h | 4 ++- 3 files changed, 41 insertions(+), 2 deletions(-) diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt index d37913343449..8a6d21e30fc5 100644 --- a/tools/perf/Documentation/perf-dlfilter.txt +++ b/tools/perf/Documentation/perf-dlfilter.txt @@ -113,7 +113,8 @@ struct perf_dlfilter_fns { const __u8 *(*insn)(void *ctx, __u32 *length); const char *(*srcline)(void *ctx, __u32 *line_number); struct perf_event_attr *(*attr)(void *ctx); - void *(*reserved[122])(void *); + __s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len); + void *(*reserved[121])(void *); }; ---- @@ -130,6 +131,8 @@ before calling. Returns 0 on success, -1 otherwise. 'attr' returns perf_event_attr, refer . +'object_code' reads object code and returns the number of bytes read. + The perf_dlfilter_al structure ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/tools/perf/util/dlfilter.c b/tools/perf/util/dlfilter.c index 2e89f322ff60..fa087422baa1 100644 --- a/tools/perf/util/dlfilter.c +++ b/tools/perf/util/dlfilter.c @@ -227,6 +227,39 @@ static struct perf_event_attr *dlfilter__attr(void *ctx) return &d->evsel->core.attr; } +static __s32 dlfilter__object_code(void *ctx, __u64 ip, void *buf, __u32 len) +{ + struct dlfilter *d = (struct dlfilter *)ctx; + struct addr_location *al; + struct addr_location a; + struct map *map; + u64 offset; + + if (!d->ctx_valid) + return -1; + + al = get_al(d); + if (!al) + return -1; + + map = al->map; + + if (map && ip >= map->start && ip < map->end && + machine__kernel_ip(d->machine, ip) == machine__kernel_ip(d->machine, d->sample->ip)) + goto have_map; + + thread__find_map_fb(al->thread, d->sample->cpumode, ip, &a); + if (!a.map) + return -1; + + map = a.map; +have_map: + offset = map->map_ip(map, ip); + if (ip + len >= map->end) + len = map->end - ip; + return dso__data_read_offset(map->dso, d->machine, offset, buf, len); +} + static const struct perf_dlfilter_fns perf_dlfilter_fns = { .resolve_ip = dlfilter__resolve_ip, .resolve_addr = dlfilter__resolve_addr, @@ -234,6 +267,7 @@ static const struct perf_dlfilter_fns perf_dlfilter_fns = { .insn = dlfilter__insn, .srcline = dlfilter__srcline, .attr = dlfilter__attr, + .object_code = dlfilter__object_code, }; #define CHECK_FLAG(x) BUILD_BUG_ON((u64)PERF_DLFILTER_FLAG_ ## x != (u64)PERF_IP_FLAG_ ## x) diff --git a/tools/perf/util/perf_dlfilter.h b/tools/perf/util/perf_dlfilter.h index e2cdf416b22e..4429f3836fa7 100644 --- a/tools/perf/util/perf_dlfilter.h +++ b/tools/perf/util/perf_dlfilter.h @@ -101,8 +101,10 @@ struct perf_dlfilter_fns { const char *(*srcline)(void *ctx, __u32 *line_number); /* Return perf_event_attr, refer */ struct perf_event_attr *(*attr)(void *ctx); + /* Read object code, return numbers of bytes read */ + __s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len); /* Reserved */ - void *(*reserved[122])(void *); + void *(*reserved[121])(void *); }; /* -- 2.17.1