From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 27B9A385843B; Wed, 24 Jan 2024 17:18:59 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 27B9A385843B
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org;
	s=default; t=1706116739;
	bh=LD6SgYh/G7dCyV3o8SLcSTH8HTZyj1XlgI5Zyew7dgM=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=SWNbpKpGTzA7/ddJqDRzS+/bpobM9C+VKjvxqITgkakqCxRbAzwOoQq8OKI42DKMX
	 xC7R3SpSibmRXGfR2WMh5UT/xU71/fDyxF5+10yjw0ScZ2gE7tux/l3LzVDlmXkYzH
	 IEEERaBsc5uCubewJ2oCmQYNhGp2JbO6mO04E6o8=
From: "simark at simark dot ca" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/31281] [gdb] intrusive_list.h:329: internal-error:
 push_back: Assertion elem_node->prev == INTRUSIVE_LIST_UNLINKED_VALUE failed.
Date: Wed, 24 Jan 2024 17:18:57 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gdb
X-Bugzilla-Component: gdb
X-Bugzilla-Version: HEAD
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: simark at simark dot ca
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-31281-4717-qlLNBu0lim@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-31281-4717@http.sourceware.org/bugzilla/>
References: <bug-31281-4717@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gdb-prs.sourceware.org>

https://sourceware.org/bugzilla/show_bug.cgi?id=3D31281

--- Comment #4 from Simon Marchi <simark at simark dot ca> ---
The problem appears to be with the computation of the node address, here:

---
/* For element types that keep the node as member field.  */

template<typename T, intrusive_list_node<T> T::*MemberNode>
struct intrusive_member_node
{
  static intrusive_list_node<T> *as_node (T *elem)
  { return &(elem->*MemberNode); }
};
---

I stopped at the first internal error.  Going up a few frames, the thread_i=
nfo
object's address is:

(gdb) p thread
$1 =3D (thread_info *) 0x517000050180

The address of its `resumed_with_pending_wait_status_node` member is (btw
printing this expression took like 10 seconds, it might be good to dig to s=
ee
if that's normal):

(gdb) p &thread->resumed_with_pending_wait_status_node=20
$2 =3D (intrusive_list_node<thread_info> *) 0x5170000503d0

However, in the `intrusive_list<thread_info>::push_back` frame, `elem_node`=
 is:

(gdb) p elem_node
$3 =3D (intrusive_list_node<thread_info> *) 0x5170000503d8

We would expect `elem_node` to be equal to `$2` above.

--=20
You are receiving this mail because:
You are on the CC list for the bug.=