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[NEW.....] VFP 9.0 FIX - THE BUFFERSIZE TERM IN THE CONFIGURATION FILE
January 2024
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CCB
1. THE BUFFERSIZE TERM:
BUFFERSIZE - Specifies the maximum amount of memory in pages for file data buffer
Specifies the maximum amount of memory in pages for file data buffer.
BUFFERSIZE = nMemoryPages
Parameters
nMemoryPages
The nMemoryPages parameter specifies the maximum amount of memory in pages for file data buffer.
The range for nMemoryPages is 1 page (64 KB) to 256 pages (16 MB).
The default value is 1 page (64 KB) for Visual FoxPro Advanced 10.0 and 10.1.
The default value is 16 pages (1 MB) for Visual FoxPro Advanced 10.2 or later.
Remarks
If we set BUFFERSIZE = 1 page, the maximum amount of memory is equal to 64 KB for file data buffer.
If we set BUFFERSIZE = 16 pages, the maximum amount of memory is equal to 1 MB for file data buffer.
If we set BUFFERSIZE = 256 pages, the maximum amount of memory is equal to 16 MB for file data buffer.
For some performance reasons, we ALWAYS set BUFFERSIZE = 1 page (64 KB) for Visual FoxPro Large Memory Manager (VFPLMM)
and Visual FoxPro Address Windowing Extensions (VFPAWE).
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 BUFFERSIZE TERM IN THE CONFIGURATION FILE
; September 2023
; ---------------------------------------------------------------------
; CCB
;
; The BUFFERSIZE term in the configuration file.
;
; 2023/9/19, by ccb
;
lea ecx , dword ptr [ ebp + 0FFFFFF60h ]
vfpa_config_buffersize_startstart:
cmp byte ptr [ecx] , 042h ;; B
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+1] , 055h ;; U
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+2] , 046h ;; F
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+3] , 046h ;; F
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+4] , 045h ;; E
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+5] , 052h ;; R
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+6] , 053h ;; S
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+7] , 049h ;; I
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+8] , 05Ah ;; Z
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+9] , 045h ;; E
jne vfpa_config_buffersize_end
cmp byte ptr [ecx+10] , 000h
jne vfpa_config_buffersize_end
xor edi , edi
inc edi
push ebx
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
push ebx
push edi
push ebx
lea eax , dword ptr [ ebp + 0FFFFFF38h ]
push eax
call Fun430428
cmp eax , 05h
jne Label5d6256
mov eax , dword ptr [ Data937fdc ]
pushd 100h
pushd 01h
lea esi , dword ptr [ ebp + 0FFFFFF38h ]
mov dword ptr [ ebp + 0FFFFFF58h ] , eax
mov byte ptr [ ebp + 0FFFFFF38h ] , 07h
call Fun87e084
cmp eax , 0FFFFFFFFh
je Label5d6256
vfpa_config_buffersize_validbuffersize_start:
cmp eax , 100h
jae vfpa_config_buffersize_validbuffersize_256
cmp eax , 80h
jae vfpa_config_buffersize_validbuffersize_128
cmp eax , 40h
jae vfpa_config_buffersize_validbuffersize_64
cmp eax , 20h
jae vfpa_config_buffersize_validbuffersize_32
cmp eax , 10h
jae vfpa_config_buffersize_validbuffersize_16
cmp eax , 08h
jae vfpa_config_buffersize_validbuffersize_8
cmp eax , 04h
jae vfpa_config_buffersize_validbuffersize_4
cmp eax , 02h
jae vfpa_config_buffersize_validbuffersize_2
cmp eax , 01h
jae vfpa_config_buffersize_validbuffersize_1
jmp vfpa_config_buffersize_validbuffersize_1
vfpa_config_buffersize_validbuffersize_256:
mov eax , 100h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_128:
mov eax , 80h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_64:
mov eax , 40h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_32:
mov eax , 20h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_16:
mov eax , 10h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_8:
mov eax , 08h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_4:
mov eax , 04h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_2:
mov eax , 02h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_1:
mov eax , 01h
jmp vfpa_config_buffersize_validbuffersize_end
vfpa_config_buffersize_validbuffersize_end:
IF VFPA_VERSION GE 102
cmp dword ptr vfpa_sys9082_data[8],03h
jne vfpa_config_buffersize_start000
jmp vfpa_config_buffersize_start
vfpa_config_buffersize_start000:
cmp dword ptr vfpa_sys9082_data[8],02h
jne vfpa_config_buffersize_start00
mov eax , 01h
jmp vfpa_config_buffersize_start
vfpa_config_buffersize_start00:
cmp dword ptr vfpa_sys9082_data[8],01h
jne vfpa_config_buffersize_start0
mov eax , 01h
jmp vfpa_config_buffersize_start
vfpa_config_buffersize_start0:
cmp dword ptr vfpa_sys9082_data[8],00h
jne vfpa_config_buffersize_start
jmp vfpa_config_buffersize_start
vfpa_config_buffersize_start:
ENDIF
cmp dword ptr vfpa_config_buffersize_data,eax
je Label40a660
push eax
;; Purge Cached File Data Buffer
mov eax , 07FFFFFFFh
call Fun68507b
;; Purge Cached Virtual Memory
push esi
push ecx
lea esi , dword ptr [ esp ]
mov dword ptr [ esp ] , 07FFFFFFFh
call Fun7e0c91
pop ecx
pop esi
;; Purge Cached Large Memory
call vfpa_lmm_purgecachedmemory
;; Set Process Working Set Size for Large Memory
call vfpa_lmm_setprocessworkingsetsize
pop eax
mov ecx , dword ptr [ Data93bb40 ]
test ecx , ecx
jne Label40a660
mov dword ptr vfpa_config_buffersize_data , eax
shl eax , 10h
mov dword ptr vfpa_config_buffersize_data[8] , eax
vfpa_config_buffersize_resetbuffersize_start:
mov eax , dword ptr vfpa_config_buffersize_data
mov ecx , 0FFFF0000h
mov edx , 08000FFFFh
cmp eax , 100h
jae vfpa_config_buffersize_resetbuffersize_256
cmp eax , 80h
jae vfpa_config_buffersize_resetbuffersize_128
cmp eax , 40h
jae vfpa_config_buffersize_resetbuffersize_64
cmp eax , 20h
jae vfpa_config_buffersize_resetbuffersize_32
cmp eax , 10h
jae vfpa_config_buffersize_resetbuffersize_16
cmp eax , 08h
jae vfpa_config_buffersize_resetbuffersize_8
cmp eax , 04h
jae vfpa_config_buffersize_resetbuffersize_4
cmp eax , 02h
jae vfpa_config_buffersize_resetbuffersize_2
cmp eax , 01h
jae vfpa_config_buffersize_resetbuffersize_1
jmp vfpa_config_buffersize_resetbuffersize_1
vfpa_config_buffersize_resetbuffersize_256:
mov ecx , 0FF000000h
mov edx , 080FFFFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_128:
mov ecx , 0FF800000h
mov edx , 0807FFFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_64:
mov ecx , 0FFC00000h
mov edx , 0803FFFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_32:
mov ecx , 0FFE00000h
mov edx , 0801FFFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_16:
mov ecx , 0FFF00000h
mov edx , 0800FFFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_8:
mov ecx , 0FFF80000h
mov edx , 08007FFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_4:
mov ecx , 0FFFC0000h
mov edx , 08003FFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_2:
mov ecx , 0FFFE0000h
mov edx , 08001FFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_1:
mov ecx , 0FFFF0000h
mov edx , 08000FFFFh
jmp vfpa_config_buffersize_resetbuffersize_end
vfpa_config_buffersize_resetbuffersize_end:
mov dword ptr vfpa_config_buffersize_data[10h] , ecx
mov dword ptr vfpa_config_buffersize_data[18h] , edx
mov eax , dword ptr vfpa_config_buffersize_data
mov dword ptr vfpa_sys9140_data , eax
jmp Label40a660
vfpa_config_buffersize_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_vfp9fix271.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix282.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix283.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix284.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix286.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
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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