Date: Sat, 20 Jul 2024 11:57:26 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Mark Millard <marklmi@yahoo.com> Cc: arm@freebsd.org, current@freebsd.org Subject: Re: armv7-on-aarch64 stuck at urdlck: I got a replication of the "ampere2" bulk build hangup problem on a Windows DevKit 2023 Message-ID: <Zpt79jpCFDSiffcy@kib.kiev.ua> In-Reply-To: <A208F7C8-0D9E-402C-BB85-A5022B37E3EC@yahoo.com> References: <A3BBDBA3-FF7E-47B8-8B45-C3351918FC08@yahoo.com> <8214703E-AB28-4FB3-A3DD-03C87363D8C6@yahoo.com> <E40B106D-30B7-49DC-8540-911A56E53FCA@yahoo.com> <BFCA474F-78D4-4E98-8A9B-B92C2DB6B0DE@yahoo.com> <E40627DC-35A2-4D5E-A85C-73D7FFD426DF@yahoo.com> <A208F7C8-0D9E-402C-BB85-A5022B37E3EC@yahoo.com>
index | next in thread | previous in thread | raw e-mail
[Everything and everybody in Cc: are stripped for good]. On Fri, Jul 19, 2024 at 10:38:36PM -0700, Mark Millard wrote: > 0x201375c0 - 0x2014092c is .bss in /lib/libthr.so.3 > > (gdb) bt > #0 0x201aeec0 in __pthread_map_stacks_exec () from /lib/libc.so.7 > #1 0x2005d1e4 in ?? () from /libexec/ld-elf.so.1 > Backtrace stopped: previous frame identical to this frame (corrupt stack?) > (gdb) disass > Dump of assembler code for function __pthread_map_stacks_exec: > => 0x201aeec0 <+0>: ldr r0, [pc, #8] @ 0x201aeed0 <__pthread_map_stacks_exec+16> > 0x201aeec4 <+4>: add r0, pc, r0 > 0x201aeec8 <+8>: ldr r0, [r0, #156] @ 0x9c > 0x201aeecc <+12>: bx r0 > 0x201aeed0 <+16>: andseq r6, r7, r4, lsr #12 > End of assembler dump. > Do the following: 1. Rebuild rtld/libc/libthr with the debugging info and no optimization, i.e. ensure that flags are "-O0 -g" or "-Og -g" and not -O2. See the first comment in libexec/rtld-elf/Makefile for the hint how to do it. 2. Reproduce the issue under gdb, and backtrace all threads from userspace. I only need userspace backtrace, not either kernel-side stacks nor the syscall history. Are you sure that the issue is specific to armv7, might be it takes more efforts to reproduce on host native?home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Zpt79jpCFDSiffcy>