NetBSD Problem Report #57638
From martin@duskware.de Sat Sep 30 17:50:06 2023
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From: martin@NetBSD.org
Reply-To: martin@NetBSD.org
To: gnats-bugs@NetBSD.org
Subject: thread local storage broken on evbarm (armv5)
X-Send-Pr-Version: 3.95
>Number: 57638
>Category: lib
>Synopsis: thread local storage broken on evbarm (armv5)
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: lib-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Sep 30 17:55:00 +0000 2023
>Originator: Martin Husemann
>Release: NetBSD 10.99.9
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD unpluged.duskware.de 10.99.9 NetBSD 10.99.9 (UNPLUGED) #521: Sat Sep 30 13:40:22 CEST 2023 martin@seven-days-to-the-wolves.aprisoft.de:/work/src/sys/arch/evbarm/compile/UNPLUGED evbarm
Architecture: earmv5
Machine: evbarm
>Description:
Many (all?) TLS related tests crash on evbarm, like:
tp-start: 1696095219.51665, t_tls_extern, 21
tc-start: 1696095219.52148, dynamic_abusedef
tc-se:Test program crashed; attempting to get stack trace
Unfortunately gdb is not helpfull (11.0.50 hangs, 13.2 crashes).
Extracting the core and examining with gdb 11.0.50 shows:
Core was generated by `t_tls_extern'.
Program terminated with signal SIGBUS, Bus error.
#0 0xbbed8c78 in _rtld_symlook_list (
name=name@entry=0xbbbc0233 "__aeabi_read_tp", hash=hash@entry=0xbfffe624,
objlist=0xbbef1258 <_rtld_list_main>,
defobj_out=defobj_out@entry=0xbfffe5d8, flags=flags@entry=1,
ventry=ventry@entry=0x0, dlp=dlp@entry=0xbfffe5dc)
at /work/src/libexec/ld.elf_so/symbol.c:88
88 /work/src/libexec/ld.elf_so/symbol.c: No such file or directory.
(gdb) info thread
Id Target Id Frame
* 1 process 9670 0xbbed8c78 in _rtld_symlook_list (
name=name@entry=0xbbbc0233 "__aeabi_read_tp", hash=hash@entry=0xbfffe624,
objlist=0xbbef1258 <_rtld_list_main>,
defobj_out=defobj_out@entry=0xbfffe5d8, flags=flags@entry=1,
ventry=ventry@entry=0x0, dlp=dlp@entry=0xbfffe5dc)
at /work/src/libexec/ld.elf_so/symbol.c:88
(gdb) info locals
symp = <optimized out>
def = 0x0
defobj = 0x0
elm = 0xbbef80e0
(gdb) p *elm
$1 = {link = {sqe_next = 0xbbef8140}, obj = 0xbbefc000}
(gdb) info dll
From To Syms Read Shared Object Library
0xbbea4270 0xbbead1c8 Yes /usr/lib/libatf-c.so.0
0xbbd3df60 0xbbe3f104 Yes /usr/lib/libc.so.12
0xbbbe0320 0xbbbe040c Yes /usr/tests/libexec/ld.elf_so/libh_use_static.so
0xbbbc0328 0xbbbc0414 Yes /usr/tests/libexec/ld.elf_so/libh_def_static.so.1
0xbbed0608 0xbbedd154 Yes /usr/libexec/ld.elf_so
(gdb) info reg
r0 0xbbbc0233 3149660723
r1 0xbfffe624 3221218852
r2 0xbbef1258 3153007192
r3 0xbfffe5d8 3221218776
r4 0xbbef80e0 3153035488
r5 0xbfffe5dc 3221218780
r6 0xbbbc0233 3149660723
r7 0x0 0
r8 0x1 1
r9 0xbfffe5d8 3221218776
r10 0xbfffe624 3221218852
r11 0xbfffe610 3221218832
r12 0x40 64
sp 0xbfffe55c 0xbfffe55c
lr 0xbbed91b8 3152908728
pc 0xbbed8c78 0xbbed8c78 <_rtld_symlook_list+24>
cpsr 0xa0000010 2684354576
(gdb) x/16i _rtld_symlook_list
0xbbed8c60 <_rtld_symlook_list>:
push {r4, r5, r6, r7, r8, r9, r10, r11, lr}
0xbbed8c64 <_rtld_symlook_list+4>: ldr r4, [r2]
0xbbed8c68 <_rtld_symlook_list+8>: sub sp, sp, #20
0xbbed8c6c <_rtld_symlook_list+12>: cmp r4, #0
0xbbed8c70 <_rtld_symlook_list+16>: ldr r5, [sp, #64] ; 0x40
0xbbed8c74 <_rtld_symlook_list+20>: str r3, [sp, #12]
=> 0xbbed8c78 <_rtld_symlook_list+24>: ldrd r8, [sp, #56] ; 0x38
0xbbed8c7c <_rtld_symlook_list+28>:
beq 0xbbed8d70 <_rtld_symlook_list+272>
0xbbed8c80 <_rtld_symlook_list+32>: mov r10, #0
0xbbed8c84 <_rtld_symlook_list+36>: mov r7, r0
0xbbed8c88 <_rtld_symlook_list+40>: mov r11, r1
0xbbed8c8c <_rtld_symlook_list+44>: mov r6, r10
0xbbed8c90 <_rtld_symlook_list+48>: ldr r12, [r5, #8]
0xbbed8c94 <_rtld_symlook_list+52>: ldr r2, [r4, #4]
0xbbed8c98 <_rtld_symlook_list+56>: cmp r12, #0
0xbbed8c9c <_rtld_symlook_list+60>:
beq 0xbbed8cf0 <_rtld_symlook_list+144>
... which looks exactly like the crash gdb 13.2 dies with.
>How-To-Repeat:
s/a
>Fix:
n/a
(Contact us)
$NetBSD: query-full-pr,v 1.47 2022/09/11 19:34:41 kim Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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