Date: Mon, 26 Oct 2020 17:11:26 -0300 From: Érico Nogueira <ericonr@...root.org> To: <musl@...ts.openwall.com>, <musl@...ts.openwall.com> Subject: Re: Status report and MT fork On Mon Oct 26, 2020 at 12:52 PM -03, Rich Felker wrote: > On Mon, Oct 26, 2020 at 03:44:51PM -0300, Érico Nogueira wrote: > > Re. the patches, I am now able to import an image into gscan2pdf (a Perl > > GTK application) - though it required building Perl with a bigger thread > > stack size. With musl 1.2.1 it simply hung on a futex syscall. > > Great to hear! Was it "working" in earlier musl though? The crash (as > discussed on irc) was clearly a stack overflow but it seems odd that > it would be newly introduced, unless it was just really borderline on > fitting before. > > Rich I hadn't tested with any musl version but 1.2.1. A quick test with 1.1.24 shows that it didn't hang then, but hit the same segfault if using perl without a fixed thread stack size. The only reason the segfault seemed new to me was because the program had never reached past the hang in the futex syscall :) I will see if I can find the time to write some programs to torture test the impl further, assuming that would help. Cheers, Érico
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