[Vm-dev] Errored: OpenSmalltalk/opensmalltalk-vm#1814 (Cog - 352de13)

[Eliot Miranda]

Hi All,

    can a linux expert take a look at the failing Travis CI build?

The following packages have unmet dependencies:
231 libpango1.0-dev:i386 : Depends: libcairo2-dev:i386 (>= 1.12.10)
but it is not going to be installed
232E: Unable to correct problems, you have held broken packages.
233The command "./scripts/ci/travis_install.sh" failed and exited with
100 during .


On Sat, Oct 5, 2019 at 8:00 PM Travis CI <builds at travis-ci.org> wrote:

>
>
> OpenSmalltalk
>
> /
>
> opensmalltalk-vm
>
> <https://travis-ci.org/OpenSmalltalk/opensmalltalk-vm?utm_medium=notification&utm_source=email>
>
> [image: branch icon]Cog
> <https://github.com/OpenSmalltalk/opensmalltalk-vm/tree/Cog>
> [image: build has errored]
> Build #1814 has errored
> <https://travis-ci.org/OpenSmalltalk/opensmalltalk-vm/builds/594102107?utm_medium=notification&utm_source=email>
> [image: arrow to build time]
> [image: clock icon]11 mins and 44 secs
>
> [image: Eliot Miranda avatar]Eliot Miranda
> 352de13 CHANGESET →
> <https://github.com/OpenSmalltalk/opensmalltalk-vm/compare/c114ece5b581...352de13869ef>
>
> Ensure that sigaltstack is used to establish an alternative signal stack on
> Unix platforms, and that the SIGIO handler (forceInterruptCheck) runs on
> that
> stack. Although we don't have absolute proof we have strong evidence to
> suggest
> that on recent macOS versions (e.g. 10.13) the first delivery of SIGIO to
> the
> VM causes corruption of the code zone if the VM is in or transitioning to
> machine code. This is similar to crashes seen in the Newspeak VM on linux
> using
> the ITIMER heartbeat. There-on the issue was that the dynamic linker would
> be
> called within the signal handler on first invocation, and that this would
> cause
> the dynamic linker to traverse the Smalltalk JIT code stack, misinteerpret
> Smalltalk stack frames as ABI-compliant stack frames and cause corruption
> as
> a result.
>
> Since the code is now system wide on Unix, not merely confined to the
> ITIMER VM,
> move the sigaltstack initialization to platforms/unix/vm/aio.c and delete
> the
> duplications in the ITIMER heartbeat variants.
>
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-- 
_,,,^..^,,,_
best, Eliot
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