On Wed, Feb 8, 2023 at 6:05 PM ClearScript Developers < clearscript...@gmail.com> wrote:
> Hi Clemens, > > >Which toolchain do you use where you see crashes? > > Our hack to retain compatibility with old distros is probably bogus and > unsupported, so if you know of a better way, please share it :) > > Anyway, what we (try to) do is roll back V8's Linux build tools to their > state as of the last version that supported Ubuntu 16.04 LTS with > glibc-2.23. After running "gclient sync" normally, we reset the "build" and > "tools/clang" repositories to specific commits, then use install-sysroot to > install specific "last known good" sysroots. > That indeed sounds like a case we don't really want to encourage :D Anyway, we just landed a CL to restrict the use of preserve_most to clang 17, which has a fix which we will start to rely on ( https://reviews.llvm.org/D143425). That should also fix your use case. Do you need us to merge that back to v8 11.1, or can you just disable that on your side until you upgrade to a recent version of v8? > > Cheers! > > On Wednesday, February 8, 2023 at 6:33:44 AM UTC-5 clem...@google.com > wrote: > >> Thanks for reaching out! Indeed, preserve_most support turned out to be a >> bit incomplete, so we tried to restrict it to the most important platforms >> and toolchains used for Chromium. It's restricted to clang anyway, and I >> didn't find any relevant fixes since the introduction in 2016. Which >> toolchain do you use where you see crashes? Maybe we can restrict it >> further to the most recent clang versions. >> >> On Wed, Feb 8, 2023 at 7:25 AM Jakob Gruber <jgr...@chromium.org> wrote: >> >>> +cle...@chromium.org >>> >>> On Tue, Feb 7, 2023 at 3:55 PM ClearScript Developers < >>> clearsc...@gmail.com> wrote: >>> >>>> Greetings! >>>> >>>> We've noticed that preserve_most was disabled >>>> <https://chromium.googlesource.com/v8/v8.git/+/d0b1dac0f9f3c5c1bbf296bd84c8f362d4832a88> >>>> for Windows/arm64 on the 11.1 branch tip today. >>>> >>>> We'd actually been struggling with extreme instability in 11.1 release >>>> builds on Linux x64, so we tried disabling preserve_most for *all* >>>> platforms, and, surprisingly, that seems to have stabilized our Linux >>>> builds completely. >>>> >>>> So, it would appear that preserve_most issues go beyond Windows/arm64. >>>> In case it matters, we do use a relatively old toolchain to preserve >>>> compatibility with older distros. >>>> >>>> Anyone have any other experiences with preserve_most? >>>> >>>> -- >>>> -- >>>> v8-users mailing list >>>> v8-u...@googlegroups.com >>>> http://groups.google.com/group/v8-users >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "v8-users" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to v8-users+u...@googlegroups.com. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/v8-users/cb4f9835-165f-4e66-81e8-0de6164e0803n%40googlegroups.com >>>> <https://groups.google.com/d/msgid/v8-users/cb4f9835-165f-4e66-81e8-0de6164e0803n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> >> >> -- >> >> Clemens Backes >> >> Software Engineer >> >> clem...@google.com >> >> Google Germany GmbH >> >> Erika-Mann-Straße 33 >> >> 80636 München >> >> Geschäftsführer: Paul Manicle, Liana Sebastian >> >> Registergericht und -nummer: Hamburg, HRB 86891 >> >> Sitz der Gesellschaft: Hamburg >> >> Diese E-Mail ist vertraulich. Falls sie diese fälschlicherweise erhalten >> haben sollten, leiten Sie diese bitte nicht an jemand anderes weiter, >> löschen Sie alle Kopien und Anhänge davon und lassen Sie mich bitte wissen, >> dass die E-Mail an die falsche Person gesendet wurde. >> >> >> This e-mail is confidential. If you received this communication by >> mistake, please don't forward it to anyone else, please erase all copies >> and attachments, and please let me know that it has gone to the wrong >> person. >> >> >> -- > -- > v8-users mailing list > v8-users@googlegroups.com > http://groups.google.com/group/v8-users > --- > You received this message because you are subscribed to the Google Groups > "v8-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to v8-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/v8-users/83ea2cb4-fa2e-4c52-94a6-2de1f6a32b5dn%40googlegroups.com > <https://groups.google.com/d/msgid/v8-users/83ea2cb4-fa2e-4c52-94a6-2de1f6a32b5dn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Clemens Backes Software Engineer cleme...@google.com Google Germany GmbH Erika-Mann-Straße 33 80636 München Geschäftsführer: Paul Manicle, Liana Sebastian Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg Diese E-Mail ist vertraulich. Falls sie diese fälschlicherweise erhalten haben sollten, leiten Sie diese bitte nicht an jemand anderes weiter, löschen Sie alle Kopien und Anhänge davon und lassen Sie mich bitte wissen, dass die E-Mail an die falsche Person gesendet wurde. This e-mail is confidential. If you received this communication by mistake, please don't forward it to anyone else, please erase all copies and attachments, and please let me know that it has gone to the wrong person. -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/CAGO%3DqhDxJOiSSNvmKWa52C2Q1wc%3D-XY9StQULrBDn40zGDb%3D8A%40mail.gmail.com.
