From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by smtp.lore.kernel.org (Postfix) with ESMTP id C9C9EC25B0C
	for <linux-kernel@archiver.kernel.org>; Fri,  5 Aug 2022 15:46:18 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S241272AbiHEPqP (ORCPT <rfc822;linux-kernel@archiver.kernel.org>);
        Fri, 5 Aug 2022 11:46:15 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47978 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S241076AbiHEPph (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 5 Aug 2022 11:45:37 -0400
Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0008867CB6;
        Fri,  5 Aug 2022 08:44:11 -0700 (PDT)
Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140])
        (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
        (No client certificate requested)
        by ams.source.kernel.org (Postfix) with ESMTPS id AAC40B82985;
        Fri,  5 Aug 2022 15:44:10 +0000 (UTC)
Received: by smtp.kernel.org (Postfix) with ESMTPSA id E11BFC433C1;
        Fri,  5 Aug 2022 15:44:06 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;
        s=k20201202; t=1659714249;
        bh=NuOpRdMsihtMLYOwhaS3C4UEtVr+be11RVn2cwjc27A=;
        h=From:To:Cc:Subject:Date:In-Reply-To:References:From;
        b=bLUNXDszz/zBqQ3brx1rD/r7bdkpSyhZXciDVIvfIarmxR1WnGSa74LxDuUcI33XI
         dGcJxGZQj2taqZRKpOZhVCWP0WQT76D10FmmwH/4mX3Kwy6HPk7Gy8jjZdPj1963j2
         F5mh9r/0rLOdO5fmZb+qPv2WE3IxKqQUTUPEZkg6x5Gv0E6zto0I2bHcDR1ReL6vSf
         bcWE/gq0lY7tzsVSnrZ3DFs+ey6RrhDGOC9Ox2ZQn+p73D+pmuefTTJHL2g8vxZ6Vg
         cmn09dJMAemfoRXhr8M34QoqyyQWAVFAENaDrV5aUuNedV/eMEXSTzomRUzCmfX1G3
         +wMAopQNkWbOA==
From:   Miguel Ojeda <ojeda@kernel.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, patches@lists.linux.dev,
        Jarkko Sakkinen <jarkko@kernel.org>,
        Miguel Ojeda <ojeda@kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Alex Gaynor <alex.gaynor@gmail.com>,
        Wedson Almeida Filho <wedsonaf@google.com>
Subject: [PATCH v9 17/27] scripts: decode_stacktrace: demangle Rust symbols
Date:   Fri,  5 Aug 2022 17:42:02 +0200
Message-Id: <20220805154231.31257-18-ojeda@kernel.org>
In-Reply-To: <20220805154231.31257-1-ojeda@kernel.org>
References: <20220805154231.31257-1-ojeda@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Recent versions of both Binutils (`c++filt`) and LLVM (`llvm-cxxfilt`)
provide Rust v0 mangling support.

Reviewed-by: Kees Cook <keescook@chromium.org>
Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com>
Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
 scripts/decode_stacktrace.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 7075e26ab2c4..564c5632e1a2 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -8,6 +8,14 @@ usage() {
 	echo "	$0 -r <release> | <vmlinux> [<base path>|auto] [<modules path>]"
 }
 
+# Try to find a Rust demangler
+if type llvm-cxxfilt >/dev/null 2>&1 ; then
+	cppfilt=llvm-cxxfilt
+elif type c++filt >/dev/null 2>&1 ; then
+	cppfilt=c++filt
+	cppfilt_opts=-i
+fi
+
 if [[ $1 == "-r" ]] ; then
 	vmlinux=""
 	basepath="auto"
@@ -180,6 +188,12 @@ parse_symbol() {
 	# In the case of inlines, move everything to same line
 	code=${code//$'\n'/' '}
 
+	# Demangle if the name looks like a Rust symbol and if
+	# we got a Rust demangler
+	if [[ $name =~ ^_R && $cppfilt != "" ]] ; then
+		name=$("$cppfilt" "$cppfilt_opts" "$name")
+	fi
+
 	# Replace old address with pretty line numbers
 	symbol="$segment$name ($code)"
 }
-- 
2.37.1