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[NEW.....] VFP 9.0 FIX - THE VFPAWE TERM IN THE CONFIGURATION FILE
January 2024
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CCB
1. THE VFPAWE TERM:
VFPAWE - Enables or disables using VFPAWE memory
Enables or disables using VFPAWE memory.
VFPAWE = ON | OFF
Parameters
ON
Enables using VFPAWE memory. ON is the startup default for Visual FoxPro Advanced 10.2 or later.
OFF
Disables using VFPAWE memory. OFF is the startup default for Visual FoxPro Advanced 10.0 and 10.1.
Remarks
If we set VFPAWE = ON, Visual FoxPro Advanced 10.2 or later version will use Visual FoxPro Address Windowing Extensions (VFPAWE).
If we set VFPAWE = OFF, Visual FoxPro Advanced 10.2 or later version will not use Visual FoxPro Address Windowing Extensions (VFPAWE).
If Visual FoxPro Advanced 10.2 or later version can use Visual FoxPro Address Windowing Extensions (VFPAWE),
when Visual FoxPro Advanced 32-bit 10.2 or later version is running on Windows 32-bit system,
it can use 4 GB memory (Disabling Physical Address Extension (PAE)) or 64 GB (maximum, Enabling Physical Address Extension (PAE)) memory,
when Visual FoxPro Advanced 32-bit 10.2 or later version is running on Windows 64-bit system, it can use 64 GB (maximum) memory,
when Visual FoxPro Advanced 64-bit 10.2 or later version is running on Windows 64-bit system, it can use 64 GB (maximum) memory.
For more information about Address Windowing Extensions (AWE), please refer to:
https://learn.microsoft.com/en-us/windows/win32/memory/address-windowing-extensions
An application must have the Lock Pages in Memory privilege to use AWE.
To obtain this privilege, an administrator must add Lock Pages in Memory to the user's User Rights Assignments.
For more information on how to do this, see "User Rights" in the operating system help.
https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/enable-the-lock-pages-in-memory-option-windows
To enable the lock pages in memory option,
1, On the Start menu, select Run. In the Open box, type gpedit.msc. The Group Policy dialog box opens.
2, On the Local Group Group Policy console, expand Computer Configuration.
3, Expand Windows Settings.
4, Expand Security Settings.
5, Expand Local Policies.
6, Select the User Rights Assignment folder. The policies will be displayed in the details pane.
7, In the pane, scroll to and double-click the Lock pages in memory policy.
8, In the Local Security Policy Setting dialog box, select "Add User or Group" to add the user or group account.
For more information about Physical Address Extension (PAE), please refer to:
https://learn.microsoft.com/en-us/windows/win32/memory/physical-address-extension
https://www.geoffchappell.com/notes/windows/license/memory.htm
2. CAUSE:
There are some BUGs in the following code.
3. RESOLUTION:
We can write some code to fix the BUG.
Fun40a45d :: ; proc near
push ebp ;0x0040a45d : 55
lea ebp , dword ptr [ esp - 104 ] ;0x0040a45e : 8d6c2498
sub esp , 0454h ;0x0040a462 : 81ec54040000
mov eax , dword ptr [ Data937090 ] ;0x0040a468 : a190709300
mov ecx , dword ptr [ ebp + 112 ] ;0x0040a46d : 8b4d70
push ebx ;0x0040a470 : 53
push esi ;0x0040a471 : 56
mov esi , dword ptr [ ebp + 116 ] ;0x0040a472 : 8b7574
mov dword ptr [ ebp + 100 ] , eax ;0x0040a475 : 894564
lea eax , dword ptr [ esi + 0642h ] ;0x0040a478 : 8d8642060000
mov dword ptr [ ebp + 0FFFFFD04h ] , eax ;0x0040a47e : 898504fdffff
push edi ;0x0040a484 : 57
lea eax , dword ptr [ esi + 0A5Ch ] ;0x0040a485 : 8d865c0a0000
mov dword ptr [ ebp + 0FFFFFD24h ] , eax ;0x0040a48b : 898524fdffff
xor ebx , ebx ;0x0040a491 : 33db
xor eax , eax ;0x0040a493 : 33c0
inc eax ;0x0040a495 : 40
push ebx ;0x0040a496 : 53
push eax ;0x0040a497 : 50
mov dword ptr [ ebp + 0FFFFFD10h ] , eax ;0x0040a498 : 898510fdffff
push ebx ;0x0040a49e : 53
lea eax , dword ptr [ ebp + 0FFFFFF38h ] ;0x0040a49f : 8d8538ffffff
push eax ;0x0040a4a5 : 50
mov dword ptr [ ebp + 0FFFFFD28h ] , ebx ;0x0040a4a6 : 899d28fdffff
mov dword ptr [ ebp + 0FFFFFF58h ] , ecx ;0x0040a4ac : 898d58ffffff
call Fun430428 ;0x0040a4b2 : e8715f0200
cmp eax , 04h ;0x0040a4b7 : 83f804
jne Label40a660 ;0x0040a4ba : 0f85a0010000
lea ecx , dword ptr [ ebp + 0FFFFFF60h ] ;0x0040a4c0 : 8d8d60ffffff
mov edx , 0100h ;0x0040a4c6 : ba00010000
lea eax , dword ptr [ ebp + 0FFFFFE38h ] ;0x0040a4cb : 8d8538feffff
call Fun42c33e ;0x0040a4d1 : e8681e0200
cmp byte ptr [ ebp + 0FFFFFF60h ] , 05Fh ;0x0040a4d6 : 80bd60ffffff5f
jne Label40a540 ;0x0040a4dd : 7561
lea edi , dword ptr [ ebp + 0FFFFFF60h ] ;0x0040a4df : 8dbd60ffffff
call Fun43099a ;0x0040a4e5 : e8b0640200
mov edi , eax ;0x0040a4ea : 8bf8
lea eax , dword ptr [ edi - 36 ] ;0x0040a4ec : 8d47dc
cmp eax , 034h ;0x0040a4ef : 83f834
ja Label40a540 ;0x0040a4f2 : 774c
movzx eax ,byte ptr [ eax + offset Data4134f1 ] ;0x0040a4f4 : 0fb680f1344100
jmp dword ptr [ 4 * eax + offset DataPtr4134e9 ] ;0x0040a4fb : ff2485e9344100
Label40a502 ::
cmp dword ptr [ ebp + 120 ] , ebx ;0x0040a502 : 395d78
jne Label5d60f1 ;0x0040a505 : 0f85e6bb1c00
Label40a50b ::
xor eax , eax ;0x0040a50b : 33c0
lea ecx , dword ptr [ ebp + 0FFFFFF38h ] ;0x0040a50d : 8d8d38ffffff
call Fun43d764 ;0x0040a513 : e84c320300
lea eax , dword ptr [ ebp + 0FFFFFF60h ] ;0x0040a518 : 8d8560ffffff
push eax ;0x0040a51e : 50
mov eax , edi ;0x0040a51f : 8bc7
call Fun409f9c ;0x0040a521 : e876faffff
mov eax , edi ;0x0040a526 : 8bc7
sub eax , 04Dh ;0x0040a528 : 83e84d
je Label5d613c ;0x0040a52b : 0f840bbc1c00
dec eax ;0x0040a531 : 48
je Label5d611c ;0x0040a532 : 0f84e4bb1c00
Label40a538 ::
xor eax , eax ;0x0040a538 : 33c0
inc eax ;0x0040a53a : 40
jmp Label40a666 ;0x0040a53b : e926010000
Label40a540 ::
cmp dword ptr [ ebp + 0FFFFFF3Ch ] , 06D1h ;0x0040a540 : 81bd3cffffffd1060000
je Label5d615c ;0x0040a54a : 0f840cbc1c00
lea eax , dword ptr [ ebp + 0FFFFFF40h ] ;0x0040a550 : 8d8540ffffff
lea ecx , dword ptr [ ebp + 0FFFFFF60h ] ;0x0040a556 : 8d8d60ffffff
call Fun415309 ;0x0040a55c : e8a8ad0000
cmp eax , 07h ;0x0040a561 : 83f807
mov dword ptr [ ebp + 0FFFFFD18h ] , eax ;0x0040a564 : 898518fdffff
je Label40a5e2 ;0x0040a56a : 7476
cmp eax , 067h ;0x0040a56c : 83f867
je Label40a5e2 ;0x0040a56f : 7471
cmp eax , 030h ;0x0040a571 : 83f830
je Label5d61b3 ;0x0040a574 : 0f8439bc1c00
mov edi , strncmp ;0x0040a57a : 8b3dcc799100
pushd 04h ;0x0040a580 : 6a04
lea eax , dword ptr [ ebp + 0FFFFFE38h ] ;0x0040a582 : 8d8538feffff
pushd offset Data9191dc ;0x0040a588 : 68dc919100
push eax ;0x0040a58d : 50
call edi ;0x0040a58e : ffd7
add esp , 0Ch ;0x0040a590 : 83c40c
test eax , eax ;0x0040a593 : 85c0
je Label5d61fb ;0x0040a595 : 0f8460bc1c00
pushd 05h ;0x0040a59b : 6a05
lea eax , dword ptr [ ebp + 0FFFFFE38h ] ;0x0040a59d : 8d8538feffff
pushd offset Data91cc84 ;0x0040a5a3 : 6884cc9100
push eax ;0x0040a5a8 : 50
call edi ;0x0040a5a9 : ffd7
add esp , 0Ch ;0x0040a5ab : 83c40c
test eax , eax ;0x0040a5ae : 85c0
je Label5d61fb ;0x0040a5b0 : 0f8445bc1c00
Label40a5b6 ::
cmp dword ptr [ ebp + 120 ] , ebx ;0x0040a5b6 : 395d78
je Label40a5e2 ;0x0040a5b9 : 7427
;
; -----------------------------------------------------------------
; VFP 9.0 FIX - THE VFPAWE TERM IN THE CONFIGURATION FILE
; August 2023
; -----------------------------------------------------------------
; CCB
;
; The VFPAWE term in the configuration file.
;
; 2023/8/21, by ccb
;
lea ecx , dword ptr [ ebp + 0FFFFFF60h ]
vfpa_config_vfpawe_start:
cmp byte ptr [ecx] , 056h ;; V
jne vfpa_config_vfpawe_end
cmp byte ptr [ecx+1] , 046h ;; F
jne vfpa_config_vfpawe_end
cmp byte ptr [ecx+2] , 050h ;; P
jne vfpa_config_vfpawe_end
cmp byte ptr [ecx+3] , 041h ;; A
jne vfpa_config_vfpawe_end
cmp byte ptr [ecx+4] , 057h ;; W
jne vfpa_config_vfpawe_end
cmp byte ptr [ecx+5] , 045h ;; E
jne vfpa_config_vfpawe_end
cmp byte ptr [ecx+6] , 000h
jne vfpa_config_vfpawe_end
push ebx
xor edi , edi
inc edi
push edi
push ebx
lea eax , dword ptr [ ebp + 0FFFFFF38h ]
push eax
call Fun430428
cmp eax , edi
jne Label5d6256
cmp dword ptr [ ebp + 0FFFFFF3Ch ] , 010h
jne Label5d6256
lea eax , dword ptr [ ebp + 0FFFFFF38h ]
lea edi , dword ptr [ ebp + 0FFFFFD0Ch ]
call Fun87dfe0
cmp eax , 01h
jne vfpa_config_vfpawe_default
xor eax , eax
cmp dword ptr [ ebp + 0FFFFFD0Ch ] , 00h
setne al
IF VFPA_VERSION GE 102
mov dword ptr vfpa_config_vfpawe_data,eax
ELSE
mov dword ptr vfpa_config_vfpawe_data,00h
ENDIF
jmp Label40a660
vfpa_config_vfpawe_default:
cmp dword ptr [ ebp + 0FFFFFF3Ch ] , 0Eh
jne Label5d6256
IF VFPA_VERSION GE 102
mov dword ptr vfpa_config_vfpawe_data,01h
ELSE
mov dword ptr vfpa_config_vfpawe_data,00h
ENDIF
jmp Label40a660
vfpa_config_vfpawe_end:
push ebx ;0x0040a5bb : 53
xor edi , edi ;0x0040a5bc : 33ff
inc edi ;0x0040a5be : 47
push edi ;0x0040a5bf : 57
push ebx ;0x0040a5c0 : 53
lea eax , dword ptr [ ebp + 0FFFFFF38h ] ;0x0040a5c1 : 8d8538ffffff
push eax ;0x0040a5c7 : 50
call Fun430428 ;0x0040a5c8 : e85b5e0200
cmp eax , edi ;0x0040a5cd : 3bc7
jne Label5d6256 ;0x0040a5cf : 0f8581bc1c00
cmp dword ptr [ ebp + 0FFFFFF3Ch ] , 010h ;0x0040a5d5 : 83bd3cffffff10
jne Label5d6256 ;0x0040a5dc : 0f8574bc1c00
Label40a5e2 ::
mov eax , dword ptr [ ebp + 0FFFFFD18h ] ;0x0040a5e2 : 8b8518fdffff
cmp eax , 0F6h ;0x0040a5e8 : 3df6000000
ja Label5d6273 ;0x0040a5ed : 0f8780bc1c00
movzx eax ,byte ptr [ eax + offset Data413716 ] ;0x0040a5f3 : 0fb68016374100
jmp dword ptr [ 4 * eax + offset DataPtr413526 ] ;0x0040a5fa : ff248526354100
Label40a601 ::
lea edx , dword ptr [ ebp + 0FFFFFD00h ] ;0x0040a601 : 8d9500fdffff
lea eax , dword ptr [ ebp + 0FFFFFC68h ] ;0x0040a607 : 8d8568fcffff
call Fun42c27f ;0x0040a60d : e86d1c0200
push ebx ;0x0040a612 : 53
push eax ;0x0040a613 : 50
call Fun42c2be ;0x0040a614 : e8a51c0200
cmp eax , ebx ;0x0040a619 : 3bc3
pop ecx ;0x0040a61b : 59
pop ecx ;0x0040a61c : 59
jne Label40a64e ;0x0040a61d : 752f
lea eax , dword ptr [ ebp + 0FFFFFD1Ch ] ;0x0040a61f : 8d851cfdffff
push eax ;0x0040a625 : 50
lea eax , dword ptr [ ebp + 0FFFFFF38h ] ;0x0040a626 : 8d8538ffffff
call Fun40a75a ;0x0040a62c : e829010000
test eax , eax ;0x0040a631 : 85c0
je Label40a64e ;0x0040a633 : 7419
lea eax , dword ptr [ ebp + 0FFFFFD1Ch ] ;0x0040a635 : 8d851cfdffff
xor ecx , ecx ;0x0040a63b : 33c9
push eax ;0x0040a63d : 50
inc ecx ;0x0040a63e : 41
call Fun4157c8 ;0x0040a63f : e884b10000
mov eax , dword ptr [ ebp + 116 ] ;0x0040a644 : 8b4574
or dword ptr [ eax + 0A78h ] , 01h ;0x0040a647 : 8388780a000001
Label40a64e ::
lea eax , dword ptr [ ebp + 0FFFFFD00h ] ;0x0040a64e : 8d8500fdffff
push eax ;0x0040a654 : 50
lea eax , dword ptr [ ebp + 0FFFFFC68h ] ;0x0040a655 : 8d8568fcffff
Label40a65b ::
call Fun42d200 ;0x0040a65b : e8a02b0200
Label40a660 ::
mov eax , dword ptr [ ebp + 0FFFFFD10h ] ;0x0040a660 : 8b8510fdffff
Label40a666 ::
mov ecx , dword ptr [ ebp + 100 ] ;0x0040a666 : 8b4d64
call Fun42bf1d ;0x0040a669 : e8af180200
pop edi ;0x0040a66e : 5f
pop esi ;0x0040a66f : 5e
pop ebx ;0x0040a670 : 5b
add ebp , 068h ;0x0040a671 : 83c568
leave ;0x0040a674 : c9
ret 010h ;0x0040a675 : c21000
4. APPLIES TO:
VFP 10 (VFP Advanced)
5. REFERENCE WEBSITES:
1, baiyujia.com:
http://www.baiyujia.com
http://www.baiyujia.com/vfpdocuments/f_vfpconfigterms.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix113.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix282.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix284.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix285.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix294.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix296.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix302.asp
2, microsoft.com:
https://devblogs.microsoft.com/oldnewthing/20110128-00/?p=11643
6. OTHER:
For reference only, there is no guarantees.
Any questions or suggestions, please send me an email at ccb2000@163.com.
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