[Issue 3428] New: OSX 10.6.1 Access violation when writing to global variables

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3428

           Summary: OSX 10.6.1 Access violation when writing to global
                    variables
           Product: D
           Version: 1.050
          Platform: x86_64
        OS/Version: Mac OS X
            Status: NEW
          Severity: critical
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: digitalmars at chrisoneill.co.uk


--- Comment #0 from Christopher O'Neill <digitalmars at chrisoneill.co.uk> 2009-10-20 14:40:22 PDT ---
DMD v1.050 (using pre-build binary)
gcc version 4.2.1 (Apple Inc. build 5646)
$ ld -v
@(#)PROGRAM:ld  PROJECT:ld64-95.2.12
DMD is creating a Mach-O executable i386

D source:

int q;
void main()
{
    q = 1;   // NB: Access violation occurs on WRITE only
}

Dump of assembler code for function _Dmain:
0x0000287c <_Dmain+0>:    push   %ebp
0x0000287d <_Dmain+1>:    mov    %esp,%ebp
0x0000287f <_Dmain+3>:    call   0x2884 <_Dmain+8>
0x00002884 <_Dmain+8>:    pop    %eax
0x00002885 <_Dmain+9>:    mov    0x1d0d0(%eax),%ecx
0x0000288b <_Dmain+15>:    movl   $0x1,(%ecx)  <-- Access Violation here
0x00002891 <_Dmain+21>:    xor    %eax,%eax
0x00002893 <_Dmain+23>:    pop    %ebp

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00002f10
0x0000288b in _Dmain ()

(gdb) x 0x2f10
0x2f10 <D6object6Object14notifyRegisterMFDFC6ObjectZvZv>:    0x83ec8b55

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