From patchwork Thu Nov 14 14:47:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 1194875 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="TwSDotmQ"; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47DPXs4f4Nz9sP4 for ; Fri, 15 Nov 2019 01:50:21 +1100 (AEDT) Received: from localhost ([::1]:58370 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVGRu-0001Y8-Hn for incoming@patchwork.ozlabs.org; Thu, 14 Nov 2019 09:50:18 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52662) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iVGPM-0000EJ-VI for qemu-devel@nongnu.org; Thu, 14 Nov 2019 09:47:42 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iVGPJ-0004jA-Nw for qemu-devel@nongnu.org; Thu, 14 Nov 2019 09:47:39 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:46108 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iVGPJ-0004hq-He for qemu-devel@nongnu.org; Thu, 14 Nov 2019 09:47:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1573742856; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Sda8jhAYFmaT4wNFwT/2rbIqomRyFRvTlCBB/wU359U=; b=TwSDotmQySD1vUvPY/oTyP5QpFpXpSdgoQGgsR3b/f4Xsoxuxj9jlLq985WfdRjIhh1oha qLygAjzpJ1t2AK/euPw2g/wRioo+9tzjuaZyFSHjkAjRtK7dIEXo4wmn4vyEUCVlXr3amg YWQZdt16Pm82uSaJzRFecGANHZhsLRU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-285-1zTNCVlFOAinLNgcF3RHKQ-1; Thu, 14 Nov 2019 09:47:35 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 814531005511 for ; Thu, 14 Nov 2019 14:47:34 +0000 (UTC) Received: from localhost (ovpn-112-38.ams2.redhat.com [10.36.112.38]) by smtp.corp.redhat.com (Postfix) with ESMTP id 227195C1C3; Thu, 14 Nov 2019 14:47:29 +0000 (UTC) From: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= To: qemu-devel@nongnu.org Subject: [PATCH v3] qemu-gdb: add an Object pretty printer Date: Thu, 14 Nov 2019 18:47:25 +0400 Message-Id: <20191114144725.2310-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-MC-Unique: 1zTNCVlFOAinLNgcF3RHKQ-1 X-Mimecast-Spam-Score: 0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , ehabkost@redhat.com, crosa@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Inspired by GObject/GType pretty printer. Example: machine_set_accel (obj=0x555556807550 [pc-i440fx-4.0-machine],... Signed-off-by: Marc-André Lureau --- scripts/qemu-gdb.py | 58 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) mode change 100644 => 100755 scripts/qemu-gdb.py diff --git a/scripts/qemu-gdb.py b/scripts/qemu-gdb.py old mode 100644 new mode 100755 index f2a305c42e..b9fc1d10d4 --- a/scripts/qemu-gdb.py +++ b/scripts/qemu-gdb.py @@ -18,6 +18,9 @@ import gdb import os, sys +if sys.version_info[0] < 3: + int = long + # Annoyingly, gdb doesn't put the directory of scripts onto the # module search path. Do it manually. @@ -44,3 +47,58 @@ coroutine.CoroutinePCFunction() # Default to silently passing through SIGUSR1, because QEMU sends it # to itself a lot. gdb.execute('handle SIGUSR1 pass noprint nostop') + + +def is_object(val): + def is_object_helper(type): + if str(type) == "Object": + return True + + while type.code == gdb.TYPE_CODE_TYPEDEF: + type = type.target() + + if type.code != gdb.TYPE_CODE_STRUCT: + return False + + fields = type.fields() + if len (fields) < 1: + return False + + first_field = fields[0] + return is_object_helper(first_field.type) + + type = val.type + if type.code != gdb.TYPE_CODE_PTR: + return False + type = type.target() + return is_object_helper (type) + + +def object_class_name(instance): + try: + inst = instance.cast(gdb.lookup_type("Object").pointer()) + klass = inst["class"] + typ = klass["type"] + return typ["name"].string() + except RuntimeError: + pass + + +class ObjectPrinter: + def __init__(self, val): + self.val = val + + def to_string(self): + name = object_class_name(self.val) + if name: + return ("0x%x [%s]")% (int(self.val), name) + return ("0x%x") % (int(self.val)) + + +def lookup_type(val): + if is_object(val): + return ObjectPrinter(val) + return None + + +gdb.pretty_printers.append(lookup_type)