[Simh] Recent build crashes on OSX

[Mark Pizzolato]

Hi Michael,

On Wednesday, February 17, 2016 at 11:48 AM, Michael Huff wrote:
> I grabbed simh_master.zip from github yesterday and compiled it on OSX and
> in a virtualbox instance of Linux Mint 17. OSX is the native OS, Linux is in a
> VM.
> 
> I have a 43BSD machine accessible to both on a shared drive. It will boot
> normally when I run vax780 inside of the Linux VM, but  when I run the
> vax780 binary I compiled in OSX it crashes.
> 
> I'm assuming I should file a bug report on the OSX build? Should I post that
> over at github and what do I need to include in the report?
> 
> I realize this is a very noob-ish mail, but I don't want to submit something
> long and involved and find it's entirely irrelevant, so I'm asking here first.
> 
> if it helps, this is what the crash looks like:
> ---
> Michaels-iMac:43BSD michael$ uname -a
> Darwin Michaels-iMac.local 15.3.0 Darwin Kernel Version 15.3.0: Thu Dec
> 10 18:40:58 PST 2015; root:xnu-3248.30.4~1/RELEASE_X86_64 x86_64
> Michaels-iMac:43BSD michael$ !va
> vax780 boot.ini.default
> 
> VAX 11/780 simulator V4.0-0 Beta        git commit id: aadd66c7
> loading ra(0,0)boot
> Boot
> : ra(0,0)vmunix
> 279844+80872+100324 start 0x12f8
> 
> Process PTE in P0 or P1 space, PC: 8002B82F (XORW3
> @-7035(R8), at D0FF6436, at -70B0(R1))
> sim> q
> Goodbye
> ---
> When I run that under my linux VM, I get:
> ---
> michael at michael-VirtualBox ~/simh/43BSD $ uname -a Linux michael-
> VirtualBox 3.13.0-24-generic #47-Ubuntu SMP Fri May 2
> 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux michael at michael-
> VirtualBox ~/simh/43BSD $ vax780 boot.ini.default
> 
> VAX 11/780 simulator V4.0-0 Beta        git commit id: aadd66c7
> loading ra(0,0)boot
> Boot
> : ra(0,0)vmunix
> 279844+80872+100324 start 0x12f8
> 4.3 BSD UNIX #1: Fri Jun  6 19:55:29 PDT 1986
>      karels at monet.Berkeley.EDU:/usr/src/sys/GENERIC
> real mem  = 8388608
> SYSPTSIZE limits number of buffers to 140 avail mem = 7187456 using 140
> buffers containing 524288 bytes of memory
> mcr0 at tr1
> mcr1 at tr2

Based on other discussion which has already taken place about this, 
I would appreciate it if you could create an issue at https://github.com/simh/simh/issues
In your description please provide the above AND:
1) The contents configuration file you are running the simulator with
2) The output of:
	sim> SHOW VERSION
     on both your failing OSX environment AND the succeeding Linux Mint environment
3) Possibly a pointer to the disk image you're booting (compressed and visible in a Google 
Drive or other publically accessible file exchange environment (web site, Sky Drive, DropBox, etc...).
4) As complete a description of your OSX system and compiler version as you 
can easily put together.

If I can reproduce the problem it certainly can be fixed.  Paul's observations about 
"does break strict-aliasing rules" might be relevant.

Thanks.

- Mark