[Bug 22722] New: Wine running out of address space (MacOS)

http://bugs.winehq.org/show_bug.cgi?id=22722

Summary: Wine running out of address space (MacOS)
           Product: Wine
           Version: unspecified
          Platform: x86
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

This is the MacOS variant of bug #13335: mmap failures on 32bit Mac OS X 10.5.8
+ NVidia

After upgrading my Mac from 1GB RAM to 4GB, Lego Star Wars 2 started crashing
in Wine-1.1.24 after a variable amount of play time. The error always starts
with:

wine(6017,0xa022e720) malloc: *** mmap(size=16777216) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug

This is repeated 6/8/10 times, size always 16MB, followed by a crash like:
wine: Unhandled page fault on write access to 0x0000003c at address 0x7305cadb
(thread 0018), starting debugger...
The backtrace shows nothing particular.

The machine is an "early 2009" Mac mini 2GHz core duo with Nvidia 9400 graphics
processor. Using Mac OS X 10.5.8 and XQuartz 2.3.3.2. So this is a strict 32bit
system.

The crashes occur sometimes after half an hour, sometime after an hour of game
play. I'm pretty confident that the RAM upgrade is the cause because
- no SW upgrade of any kind was done around that time
   (let's hope I got no trojan),
- I'm using LSW2 in wine-1.1.24 with a prefix distinct from
  my git snapshot work,
- the app has been very stable in the past (the children played for hours),
- another app started failing as well (see next comment),
- syslogs prove the mmap failures began following the RAM upgrade,
- the crashes appear in levels the children played in the past, not new ones,
- such a huge RAM upgrade affects the memory mapping. Among others, the Nvidia
chip is said to make use of more main memory when the machine has more than 1GB
RAM (256MB? instead of 128MB).

Obviously the machine is not running out of memory.  It now has more than
before.  Instead, I believe this confirms the hypothesis about running out of
address space, c.f. R. Colenbrander in bug #13335, comment #96.

I have no reasons to believe that the new RAM is faulty.  The machine is very
stable and only 2 apps in Wine are affected. I'm not going to remove the RAM
because of the effort it was to open the Mac mini box (the back sat so tight
that you couldn't slide in a putty knife, not even a sheet of paper).

Perhaps somebody knows a SW tool that can simulate a Mac equipped with 1GB RAM
only?

Few people ever reported the dependency of the mmap failure on the amount of
RAM. http://forums.adobe.com/message/1875853 mentions a perhaps similar failure
with native Photoshop.

Because of bug #22029 I cannot test the app in current Wine. It's unfortunate
that this mmap issue affects wine-1.1.24 because this release was excellent at
3D games with the 1GB Mac Mini.