From patchwork Fri Aug 24 00:10:47 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Kim Phillips X-Patchwork-Id: 10574693 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7115F5A4 for ; Fri, 24 Aug 2018 00:11:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 585A82C7EE for ; Fri, 24 Aug 2018 00:11:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 55B5A2C900; Fri, 24 Aug 2018 00:11:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A2FFE2C7EE for ; Fri, 24 Aug 2018 00:11:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Mime-Version:Message-Id:Subject:To:From :Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=F2oE5STPzUHBM/61pOtVvfps3sf8l7pYvUEI+5XeS9o=; b=lL3qziG9XRwIUi S7hzQesVRH82diBs4/W2Uk66nY6OWZfY9VSekeHHa8RVJaMGvmlaVZeEiXX1kyt9ic8W4c/HxEvmC MoUOC3nRN+esr0Uhej6RXpt0PL6kb+fvseQD30ipBxsljW81WKRLZ0J+GZsq+0Wpe7qk0Xe+YAfbr 4EeVCJ0vMjtOAGIvU8oYimxw3OiRZ6XwDDYPJ63YTgLt2uOsGC3dVVm3ycu/Qp301cCocaMMNypgH M0ZSElbO62dCKFqnqjJKBJ45/+J2iH6Xa2wTYXsAHLgYuyczFIYnNtznl6xGEN1bEru3621Ih0z1w IFTgqTnol5vDt3miuARw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fszgx-0001cD-7b; Fri, 24 Aug 2018 00:11:07 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fszgs-0001ao-Pi for linux-arm-kernel@lists.infradead.org; Fri, 24 Aug 2018 00:11:04 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7715C7A9; Thu, 23 Aug 2018 17:10:48 -0700 (PDT) Received: from dupont (dupont.austin.arm.com [10.118.16.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C331C3F2EA; Thu, 23 Aug 2018 17:10:47 -0700 (PDT) Date: Thu, 23 Aug 2018 19:10:47 -0500 From: Kim Phillips To: Arnaldo Carvalho de Melo Subject: [PATCH] perf annotate: fix parsing aarch64 branch instructions after objdump update Message-Id: <20180823191047.9260992844205984b75e6721@arm.com> Organization: Arm X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180823_171102_845393_4920B9A0 X-CRM114-Status: GOOD ( 18.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Alexander Shishkin , Jiri Olsa , Ravi Bangoria , linux-kernel@vger.kernel.org, perf group , Christian Borntraeger , Peter Zijlstra , Ingo Molnar , Anton Blanchard , Namhyung Kim , Robin Murphy , linux-arm-kernel@lists.infradead.org, Taeung Song Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Starting with binutils 2.28, aarch64 objdump adds comments to the disassembly output to show the alternative names of a condition code [1]. It is assumed that commas in objdump comments could occur in other arches now or in the future, so this fix is arch-independent. The fix could have been done with arm64 specific jump__parse and jump__scnprintf functions, but the jump__scnprintf instruction would have to have its comment character be a literal, since the scnprintf functions cannot receive a struct arch easily. This inconvenience also applies to the generic jump__scnprintf, which is why we add a raw_comment pointer to struct ins_operands, so the __parse function assigns it to be re-used by its corresponding __scnprintf function. Example differences in 'perf annotate --stdio2' output on an aarch64 perf.data file: BEFORE: → b.cs ffff200008133d1c // b.hs, dffff7ecc47b AFTER : ↓ b.cs 18c BEFORE: → b.cc ffff200008d8d9cc // b.lo, b.ul, dffff727295b AFTER : ↓ b.cc 31c The branch target labels 18c and 31c also now appear in the output: BEFORE: add x26, x29, #0x80 AFTER : 18c: add x26, x29, #0x80 BEFORE: add x21, x21, #0x8 AFTER : 31c: add x21, x21, #0x8 The Fixes: tag below is added so stable branches will get the update; it doesn't necessarily mean that commit was broken at the time, rather it didn't withstand the aarch64 objdump update. Tested no difference in output for sample x86_64, power arch perf.data files. [1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=bb7eff5206e4795ac79c177a80fe9f4630aaf730 Cc: Ravi Bangoria Cc: Anton Blanchard Cc: Robin Murphy Cc: Alexander Shishkin Cc: Christian Borntraeger Cc: Mark Rutland Cc: Peter Zijlstra Cc: Taeung Song Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Fixes: b13bbeee5ee6 ("perf annotate: Fix branch instruction with multiple operands") Signed-off-by: Kim Phillips --- tools/perf/util/annotate.c | 17 ++++++++++++++++- tools/perf/util/annotate.h | 1 + 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index e32ead4744bd..b83897dafbb0 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -282,7 +282,8 @@ bool ins__is_call(const struct ins *ins) return ins->ops == &call_ops || ins->ops == &s390_call_ops; } -static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *ops, struct map_symbol *ms) +static int jump__parse(struct arch *arch, struct ins_operands *ops, + struct map_symbol *ms) { struct map *map = ms->map; struct symbol *sym = ms->sym; @@ -291,6 +292,15 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op }; const char *c = strchr(ops->raw, ','); u64 start, end; + + /* + * Prevent from matching commas in the comment section, e.g.: + * ffff200008446e70: b.cs ffff2000084470f4 // b.hs, b.nlast + */ + ops->raw_comment = strchr(ops->raw, arch->objdump.comment_char); + if (c && ops->raw_comment && c > ops->raw_comment) + c = NULL; + /* * Examples of lines to parse for the _cpp_lex_token@@Base * function: @@ -367,6 +377,11 @@ static int jump__scnprintf(struct ins *ins, char *bf, size_t size, return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.sym->name); c = strchr(ops->raw, ','); + + /* Prevent from matching commas in the comment section */ + if (ops->raw_comment && c && c > ops->raw_comment) + c = NULL; + if (c != NULL) { const char *c2 = strchr(c + 1, ','); diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h index 005a5fe8a8c6..5399ba2321bb 100644 --- a/tools/perf/util/annotate.h +++ b/tools/perf/util/annotate.h @@ -22,6 +22,7 @@ struct ins { struct ins_operands { char *raw; + char *raw_comment; struct { char *raw; char *name;