[Mono-list] Apache+mono+mod_mono_server with '--gc=sgen' fails on start-up

[Tymek Majewski]

Hi gurus,

I have a Apache+mono+mod_mono_server setup and I would like to
experiment with the new garbage collector, but when I start mono with
--gc=sgen reports a 'Stack overflow' problem on start-up.

The test case is:
/usr/local/mono-2.10.1/bin/mono --debug --gc=sgen
/usr/local/mono-2.10.1/lib/mono/4.0/mod-mono-server4.exe --filename
/tmp/.mono_unix_socket_app1 --applications /app1/:/home/me/app1
--nonstop

The output is:
Stack overflow: IP: 0x404e9fe2, fault addr: (nil)
Stacktrace:
  at System.Exception.ToString () [0x00000] in
/home/tym/mono/mono-2.10.1/mcs/class/corlib/System/Exception.cs:285
  <...>
  at (wrapper runtime-invoke) <Module>.runtime_invoke_object__this__
(object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

Just to reiterate without "--gc=sgen" it's all good.

If I run mono --version it reports correctly that GC is set to 'sgen':
tym at tym-pc:~$ /usr/local/mono-2.10.1/bin/mono --gc=sgen --version
Mono JIT compiler version 2.10.1 (tarball Mon Apr 11 05:13:56 UTC 2011)
Copyright (C) 2002-2011 Novell, Inc and Contributors. www.mono-project.com
        TLS:           normal
        SIGSEGV:       altstack
        Notifications: epoll
        Architecture:  amd64
        Disabled:      none
        Misc:          softdebug
        LLVM:          supported, not enabled.
        GC:            sgen


Do I have to do something else, like recompile mod_mono with some special flags?

Thanks in advance for any help.

Regards,
Tymek Majewski