Date: Thu, 29 Oct 2020 17:13:48 +0100 From: Szabolcs Nagy <nsz@...t70.net> To: Milan P. Stanić <mps@...anta.net> Cc: musl@...ts.openwall.com Subject: Re: [PATCH v2] MT fork * Milan P. Stanić <mps@...anta.net> [2020-10-29 00:06:10 +0100]: > On Wed, 2020-10-28 at 14:56, Rich Felker wrote: > > On Tue, Oct 27, 2020 at 05:17:35PM -0400, Rich Felker wrote: > > > > > > > > > > Will follow up with draft patch for testing. > > > > > > > > Patch attached. It should suffice for testing and review of whether > > > > there are any locks/state I overlooked. It could possibly be made less > > > > ugly too. > > > > [...] > > > > > > Another bug: > > > [...] > > > > And an updated version of the patch with both previously reported bugs > > fixed, for the purpose of users/distros wanting to test without > > manually fixing up the patch. Attached. > > Applied this patch on top of current musl master, build it on Alpine and > installed. > > Tested by building ruby lang. Works fine. > Also tested building zig lang, works fine. > But crystal lang builds fine, but running it hangs. strace shows: > ------------- > [pid 5573] futex(0x7efc50fba9e4, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> > [pid 5568] futex(0x7efc5118f984, FUTEX_REQUEUE_PRIVATE, 0, 1, 0x7efc514b67a4) = 1 > [pid 5568] futex(0x7efc514b67a4, FUTEX_WAKE_PRIVATE, 1) = 1 > [pid 5571] <... futex resumed>) = 0 > [pid 5568] futex(0x7efc511099e4, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> > [pid 5571] futex(0x7efc510409e4, FUTEX_WAIT_PRIVATE, 2, NULL > ------------- > where it hangs. try to attach gdb to the process that hang and do thread apply all bt (make sure musl-dbg is installed)
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