[Mono-dev] Crashes In Mini-Runtime on Ubuntu 14.04

[Douglas Roffel]

According to that bug tracker, the issue was fixed in 3.13.0-54.91 for Trusty. My kernel version is 3.13.0-62-generic, which is newer than that.

From: Jerod Venema [mailto:jerod.venema at frozenmountain.com]
Sent: Thursday, September 03, 2015 12:58 PM
To: Douglas Roffel
Cc: mono-devel-list at lists.ximian.com
Subject: Re: [Mono-dev] Crashes In Mini-Runtime on Ubuntu 14.04

This bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450584

On Thu, Sep 3, 2015 at 3:51 PM, Douglas Roffel <droffel at commvault.com<mailto:droffel at commvault.com>> wrote:
I forgot to paste the backtrace, sorry about that: http://pastebin.com/raw.php?i=ULAcFYq1

From: Douglas Roffel
Sent: Thursday, September 03, 2015 12:48 PM
To: 'mono-devel-list at lists.ximian.com<mailto:mono-devel-list at lists.ximian.com>'
Subject: Crashes In Mini-Runtime on Ubuntu 14.04

Hey Mono-Dev,

I’ve recently been trying to debug a crash in the Mini-Runtime, and I’m unsure of where to look. The cause of the crash is a failed mono_domain_get (), which returns a null pointer at mini-runtime.c:2101
MonoDomain *domain = mono_domain_get ();

This causes a segfault at mini-runtime.c:2110
domain_info = domain_jit_info (domain);

Calling mono_domain_get after the segfault returns a valid appdomain, and this function is executed hundreds of times before segfaulting, so the appdomain has definitely been initialized properly.

Here is a backtrace of the state of all threads directly before the crash, the segfault occurs in thread 9.

I apparently don’t have the latest version of mini-runtime, so my line numbers are slightly off from master (I’m running Mono 4.3.0, pulled and compiled on august 18th, for reference). The line numbers I’m referencing are in the official repo at:
                https://github.com/mono/mono/blob/master/mono/mini/mini-runtime.c#L2097
                https://github.com/mono/mono/blob/master/mono/mini/mini-runtime.c#L2106


Any direction would be appreciated,


-          Douglas Roffel



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***************************Legal Disclaimer***************************
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