[Bug 35256] New: Skyrim - "Not enough memory to run application" error

http://bugs.winehq.org/show_bug.cgi?id=35256

Bug ID: 35256
           Summary: Skyrim - "Not enough memory to run application" error
           Product: Wine
           Version: 1.7.8
          Hardware: x86-64
                OS: Mac OS X
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: kernel32
          Assignee: [e-mail]
          Reporter: [e-mail]
    Classification: Unclassified

Created attachment 47022
  --> http://bugs.winehq.org/attachment.cgi?id=47022
Wine identifies 200MB out of 30GB of available userland memory

Occasionally when attempting to run Skyrim (or other memory intensive programs)
through Wine on OS X, a "Memory Error: Not enough memory to run application"
popup will appear and the program will exit.

Simple workarounds: logging out and back in, rebooting.

I believe this is caused by GlobalMemoryStatusEx() in kernel32/heap.c returning
wildly incorrect values (see the attached log for an example from a system with
32GB of memory - most of it available).

On OS X and BSDs, GlobalMemoryStatusEx() still gets the total system memory
(ullTotalPhys) by asking sysctl() for the value of HW_PHYSMEM, which is capped
at 2GB. The available system memory (ullAvailPhys) is determined by asking
sysctl() for HW_USERMEM, which is also apparently 32-bit and overflows
dreadfully. On OS X,  Wine temporarily stores both values in an unsigned int.

I recompiled kernel32.dll.so using HW_MEMSIZE in place of HW_PHYSMEM and a
kludged value for ullAvailPhys; Skyrim now runs reliably. The example patch
will also be attached for anyone who can reproduce this issue.