From patchwork Fri Oct 8 04:27:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tzvetomir Stoyanov (VMware)" X-Patchwork-Id: 12544373 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23012C433EF for ; Fri, 8 Oct 2021 04:27:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 002A160F35 for ; Fri, 8 Oct 2021 04:27:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233346AbhJHE3L (ORCPT ); Fri, 8 Oct 2021 00:29:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51426 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236409AbhJHE3J (ORCPT ); Fri, 8 Oct 2021 00:29:09 -0400 Received: from mail-ed1-x52e.google.com (mail-ed1-x52e.google.com [IPv6:2a00:1450:4864:20::52e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A4E63C061755 for ; Thu, 7 Oct 2021 21:27:14 -0700 (PDT) Received: by mail-ed1-x52e.google.com with SMTP id v18so31594869edc.11 for ; Thu, 07 Oct 2021 21:27:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ouUPdX/PFfDz4Wyg9WnRuXzTY+cYqywgfcxBHCDWMBY=; b=XgRzZ6ysf3wj1ABKBwYL4VgxqlKT641fTPLcssj1v0ABclAe/zWGxg7d4Nsktcp452 IS0MMZJMfswQ3QKnhJx4GxqFkD8Bbkpt3EiXaKyAsiHNA/0L7c+kS0FYMDEXl5ae14g1 MnKH1dPdXPSsL8/o5VM6JJxKMPtJYUtqtfj0cI8cC4j6t7DWyBN/v9ATxVeAiEeJ9vVh z9a7OA2c8oSMoisaWwbei7REQNYA3zmkmAnIbhOOy3Ie7M+u+kZX2yB/TDzLtwRMd71I vsJATbfSNu98F+DoK/xarUJTTsiRxpaaRKOiHGxqAGbo88m+R5/6Rm9AQqvMoRBvXhYM p46w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ouUPdX/PFfDz4Wyg9WnRuXzTY+cYqywgfcxBHCDWMBY=; b=wBs2zCeckKa3gV1u1TASqfnZ4yxaCV7fyOR7VIxn1xuVpM58xwUZIvQdP+H6je53Jo ObJBPClSv++Y54n2MOrWeebVzaPDuqrwF0mp+xq04ssgy5ZCoNtyWnqjTbIf4BBgz4r3 8EdVm/okBT4tIMW84F0vQlKfotwsrnQYzC2MTWMfB1s0ToSzxURoAW09aFv6kavM5S4l hDT1EzuwPl4FcjjpYULxTE4CqZuNjkTEHm7p/6hr5CPQ+MaY3YDyHoBY8CBB0AvxaQP0 N5wk1/m78MJHvFsnHzZqtQBdbtgmNSAjv5YVeJCqJZvBRZarCJMGsluXF/zd5lMtClFi 4UoA== X-Gm-Message-State: AOAM5333EGQrqD2Kixzp93v0BIAlel+DHvIPMr7jaoeJKTHWxVi0jmoz PE3XzHQhxl88MUsQZJZ0cEqsSDumYy1eug== X-Google-Smtp-Source: ABdhPJznKyjyPtUEfS9+9GywvgXbXWPEbmTc9ah6t0/5xNjRgcv2AKMYFSioe4SZ0DMUuzLwo8udLw== X-Received: by 2002:a05:6402:7:: with SMTP id d7mr11960382edu.265.1633667233250; Thu, 07 Oct 2021 21:27:13 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id q6sm456536ejm.106.2021.10.07.21.27.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Oct 2021 21:27:12 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v3 09/10] trace-cmd dump: Add new argument --sections Date: Fri, 8 Oct 2021 07:27:00 +0300 Message-Id: <20211008042701.979075-10-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211008042701.979075-1-tz.stoyanov@gmail.com> References: <20211008042701.979075-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org The new "trace-cmd dump --sections" argument walks through the sections from a trace file version 7 and prints their headers. The logic does not rely on the options, describing these sections. It could be useful to dump broken or incomplete trace files. Signed-off-by: Tzvetomir Stoyanov (VMware) --- tracecmd/trace-dump.c | 71 +++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 68 insertions(+), 3 deletions(-) diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c index c222cd66..ab2fa2e5 100644 --- a/tracecmd/trace-dump.c +++ b/tracecmd/trace-dump.c @@ -686,7 +686,7 @@ static void dump_option_section(int fd, unsigned int size, do_print(OPTIONS, "%lld\n", sec->offset); } -static void dump_sections(int fd) +static void dump_sections(int fd, int count) { struct file_section *sec = sections; unsigned short flags; @@ -724,6 +724,7 @@ static void dump_sections(int fd) uncompress_reset(); sec = sec->next; } + do_print(SUMMARY|SECTIONS, "\t[%d sections]\n", count); } static int dump_options_read(int fd); @@ -937,17 +938,76 @@ static void dump_v6_file(int fd) dump_therest(fd); } +static int walk_v7_sections(int fd) +{ + unsigned long long offset, soffset; + unsigned short fl; + char buf[DUMP_SIZE]; + unsigned short id; + int size, csize, rsize; + int count = 0; + + offset = lseek64(fd, 0, SEEK_CUR); + do { + soffset = lseek64(fd, 0, SEEK_CUR); + if (read_file_number(fd, &id, 2)) + break; + if (id >= TRACECMD_OPTION_MAX) + die("Unknown section id %d", id); + if (read_file_string(fd, buf, DUMP_SIZE)) + die("cannot read section description"); + if (read_file_number(fd, &fl, 2)) + die("cannot read section flags"); + if (read_file_number(fd, &size, 4)) + die("cannot read section size"); + if (size <= 4) + die("Section %d (%s) is too small, %d bytes", id, buf, size); + count++; + if (fl & TRACECMD_SEC_FL_COMPRESS) { + if (id == TRACECMD_OPTION_BUFFER || + id == TRACECMD_OPTION_BUFFER_TEXT) { + do_print(SECTIONS, + "\t[Section %2d @ %-16lld\t\"%s\", flags 0x%X, " + "%d compressed bytes]\n", + id, soffset, buf, fl, size); + } else { + if (read_file_number(fd, &csize, 4)) + die("cannot read section size"); + if (read_file_number(fd, &rsize, 4)) + die("cannot read section size"); + do_print(SECTIONS, "\t[Section %2d @ %-16lld\t\"%s\", flags 0x%X, " + "%d compressed, %d uncompressed]\n", + id, soffset, buf, fl, csize, rsize); + size -= 8; + } + } else { + do_print(SECTIONS, "\t[Section %2d @ %-16lld\t\"%s\", flags 0x%X, %d bytes]\n", + id, soffset, buf, fl, size); + } + + if (lseek64(fd, size, SEEK_CUR) == (off_t)-1) + break; + } while (1); + + if (lseek64(fd, offset, SEEK_SET) == (off_t)-1) + die("cannot restore the original file location"); + return count; +} + static void dump_v7_file(int fd) { long long offset; + int sections; if (read_file_number(fd, &offset, 8)) die("cannot read offset of the first option section"); - if (lseek64(fd, offset, SEEK_SET) == (off64_t)-1) + sections = walk_v7_sections(fd); + + if (lseek64(fd, offset, SEEK_SET) == (off_t)-1) die("cannot goto options offset %lld", offset); dump_options(fd); - dump_sections(fd); + dump_sections(fd, sections); } static void free_sections(void) @@ -988,6 +1048,7 @@ static void dump_file(const char *file) } enum { + OPT_sections = 241, OPT_verbose = 242, OPT_clock = 243, OPT_all = 244, @@ -1031,6 +1092,7 @@ void trace_dump(int argc, char **argv) {"options", no_argument, NULL, OPT_options}, {"flyrecord", no_argument, NULL, OPT_flyrecord}, {"clock", no_argument, NULL, OPT_clock}, + {"sections", no_argument, NULL, OPT_sections}, {"validate", no_argument, NULL, 'v'}, {"help", no_argument, NULL, '?'}, {"verbose", optional_argument, NULL, OPT_verbose}, @@ -1094,6 +1156,9 @@ void trace_dump(int argc, char **argv) if (trace_set_verbose(optarg) < 0) die("invalid verbose level %s", optarg); break; + case OPT_sections: + verbosity |= SECTIONS; + break; default: usage(argv); }