[Vm-dev] [squeak-dev] Next Release Candidate?

Marcel Taeumel marcel.taeumel at hpi.de
Mon Dec 13 08:57:10 UTC 2021

Hi Eliot, hi all --

VM 202112111958 is still crashing on Windows 10 (64-bit). File name for crash dump still with Chinese characters :-O

(Smalltalk classNamed: #CryptoHashFunctionTest) run: #testHMACSHA512Spec

Fatal Squeak VM error
Sorry but the Squeak VM has crashed.

Exception code:    c0000005
Exception address: 0000000067b81940
Current byte code: -1
Primitive index:   0

Crashed in the VM thread

This information will be stored in the file

with a complete stack dump

Am 12.12.2021 19:17:30 schrieb Bruce O'Neel <bruce.oneel at pckswarms.ch>:

Thanks very much!

This version:


Date: Sat Dec 11 11:58:58 2021 CommitHash: 97b4903b4

and ran this test:

Installer ss

project: 'Registers';

install: 'Registers-Core'.

Installer ss

project: 'Cryptography';

addPackage: 'CryptographyHashing';

addPackage: 'CryptographyHashingTests';


(Smalltalk classNamed: #SHA256WithSHA2PluginTest) run: #testInputs


Linux64x64 had no crashes, but a few expected failures.

Linux64ARMv8 had no crashes but some unexpected test failures

Linux32ArmV6 had no crashes but some unexpected test failures.

So thanks, this bug seems squashed.



On 2021-12-11T21:02:23.000+01:00, Eliot Miranda <eliot.miranda at gmail.com> wrote:
Hi Both,

     see commit 97b4903b4b88f22c1bd11760f107852c63f9db40
Author: Eliot Miranda <eliot.miranda at gmail.com [mailto:eliot.miranda at gmail.com]>
Date:   Sat Dec 11 11:58:58 2021 -0800

    src/plugins/SHA2Plugin/SHA2Plugin.c as per CryptographyPlugins-eem.24

    Fix crashes in primitiveSHA256ProcessBufferUpdatingHash when compiling with
    Clang on x86_64 due to SSE instructions which require 128-bit stack alignment.

I need to know about any other such crashes pronto.

On Fri, Dec 10, 2021 at 4:43 AM Levente Uzonyi <leves at caesar.elte.hu [mailto:leves at caesar.elte.hu]> wrote:

Hi Marcel,

The SHA2 plugin (primitiveSHA256ProcessBufferUpdatingHash) still
crashes with that VM on 64-bit linux.
The plugin code works with earlier versions, so it's either a VM
change of the past 6-9 months, a code generator bug or a compiler bug IMO.

To reproduce the crash, evaluate the following:

Installer ss
        project: 'Registers';
        install: 'Registers-Core'.
Installer ss
        project: 'Cryptography';
        addPackage: 'CryptographyHashing';
        addPackage: 'CryptographyHashingTests';
(Smalltalk classNamed: #SHA256WithSHA2PluginTest) run: #testInputs

Interestingly another test (SHA512WithSHA2PluginTest) using a very
similar primitive but with DoubleWords works fine. So perhaps it's an
alignment issue.

Assert and debug VMs do not have that issue, so it's not that easy to
debug it. What I found was that buffer's value at
https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/99f1116c0f7a4ba9a0bf88cf7deb276325aa2d79/src/plugins/SHA2Plugin/SHA2Plugin.c#L277 [https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/99f1116c0f7a4ba9a0bf88cf7deb276325aa2d79/src/plugins/SHA2Plugin/SHA2Plugin.c#L277]
was not the expected pointer, so the subsequent copying into it resulted
in segmentation fault.




best, Eliot
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