Date: Thu, 29 Jun 2023 13:52:52 +0200 From: Willem Jan Withagen <wjw@digiware.nl> To: Dimitry Andric <dim@FreeBSD.org> Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, current@freebsd.org Subject: Re: __cxa_thread_call_dtors: dtr 0x........ from unloaded dso, skipping Message-ID: <9e0a27a0-acb3-d30c-14db-ea59042d435b@digiware.nl> In-Reply-To: <CDF72440-A1AE-4278-B110-897655BCF9E8@FreeBSD.org> References: <46pq4r4n-p46r-47nn-r1ss-7r2984891pn7@yvfgf.mnoonqbm.arg> <16A8852E-DEA9-408E-80BC-94322FB2415E@FreeBSD.org> <p2p1n65r-511q-9oos-6369-0qnq2q7os4q7@yvfgf.mnoonqbm.arg> <0A55614E-3577-4933-9CCD-4D723DFA86E8@FreeBSD.org> <08035b3a-7356-efc8-616b-cbf46c1904e7@digiware.nl> <CDF72440-A1AE-4278-B110-897655BCF9E8@FreeBSD.org>
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On 29-6-2023 12:37, Dimitry Andric wrote: > On 29 Jun 2023, at 12:25, Willem Jan Withagen <wjw@digiware.nl> wrote: >> On 26-6-2023 17:38, Dimitry Andric wrote: >>> On 26 Jun 2023, at 17:29, Bjoern A. Zeeb <bzeeb-lists@lists.zabbadoz.net> wrote: >>>> On Mon, 26 Jun 2023, Dimitry Andric wrote: >>>> >>>>> On 26 Jun 2023, at 17:00, Bjoern A. Zeeb <bzeeb-lists@lists.zabbadoz.net> wrote: >>>>>> while building world and current I see a lot of: >>>>>> >>>>>> __cxa_thread_call_dtors: dtr 0x...... from unloaded dso, skipping >>>>>> >>>>>> Can anyone shed light on that? >>>>> You need (thanks to Kostik): >>>>> https://cgit.freebsd.org/src/commit/?id=42ceab3ea1a997db93b65404be0ee4b17b5382d7 >>>>> >>>>> Build libc and install it, then the messages should disappear. >>>> Great! Basically update world and it'll go. >>>> Do we add an UPDATING note for this or do we consider it developer noise? >>> I think the message has been there for a long time, but was not often >>> noticed. It happened when the buildworld bootstrap decides to build a >>> static bootstrap lld ("SYSTEM_LINKER: libclang will be built for >>> bootstrapping a cross-linker"), so usually when lld's version is bumped. >>> And that is because lld is one of the few threaded build tools in the >>> tree. >>> >>> The messages themselves are harmless and can be ignored. Feel free to >>> add an UPDATING note to that effect, otherwise worried users might think >>> something is off. :) >> Actually I had that in my Ceph-ports as well, and chose to ignore it.... >> Looked into the difference between FreeBSD and Linux. >> Linux prevents that message by counting the number of loads, and only unloads >> when the counter hits zero. FreeBSD just seems to unload, and report illegal access. > There is no "loading" and "unloading" going on, since this is about a > static executable. What happened was that __cxa_thread_call_dtors() was > giving a misleading message, because _rtld_addr_phdr() always returned > 0. Kostik has now made it so _rtld_addr_phdr() does the right thing for > static executables. So the "feature" I described is still in there? Any chance of that getting fixed? --WjW
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