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[BUG/PRB.] VFP 9.0 FIX - THE NUMBER OF TIMES TO TRY AGAIN AFTER PACK DBF FAILED
January 2024
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CCB
1. BUG:
In vfp9 (and vfp6, vfp7, vfp8), somtimes the pack dbf function runs failed on Windows Vista or later.
2. CAUSE:
There are some compatible problems when vfp calls the pack dbf function
for the Windows Defender program or the antivirus programs.
Now if vfp calls the pack dbf function failed,
it will call the pack dbf function many times again.
There are some BUGs in the following code.
3. RESOLUTION:
We can write some code to fix the BUG.
Label441dfa ::
mov eax , dword ptr [edi] ;0x00441dfa : 8b07
mov eax , dword ptr [eax] ;0x00441dfc : 8b00
push esi ;0x00441dfe : 56
call Fun413b37 ;0x00441dff : e8331dfdff
mov eax , dword ptr [edi] ;0x00441e04 : 8b07
mov ecx , dword ptr [ ebp - 52 ] ;0x00441e06 : 8b4dcc
push dword ptr [ ebp - 60 ] ;0x00441e09 : ff75c4
mov esi , edi ;0x00441e0c : 8bf7
mov dword ptr [ eax + 8 ] , ecx ;0x00441e0e : 894808
call Fun52e00c ;0x00441e11 : e8f6c10e00
mov ecx , edi ;0x00441e16 : 8bcf
call Fun43f9b2 ;0x00441e18 : e895dbffff
push ebx ;0x00441e1d : 53
call Fun441949 ;0x00441e1e : e826fbffff
mov esi , eax ;0x00441e23 : 8bf0
xor ecx , ecx ;0x00441e25 : 33c9
cmp esi , ecx ;0x00441e27 : 3bf1
jne Label5c42b0 ;0x00441e29 : 0f8581241800
Label441e2f ::
mov dword ptr [ ebx + 76 ] , ecx ;0x00441e2f : 894b4c
mov dword ptr [ ebx + 80 ] , ecx ;0x00441e32 : 894b50
mov ecx , ebx ;0x00441e35 : 8bcb
call Fun43f9b2 ;0x00441e37 : e876dbffff
;
; ------------------------------------------------------------------------------
; VFP 9.0 FIX - THE NUMBER OF TIMES TO TRY AGAIN AFTER PACK DBF FAILED
; December 2020
; ------------------------------------------------------------------------------
; CCB
;
; The number of times to try again after pack dbf failed.
;
; 2020/12/26, by ccb
;
; lea edi , dword ptr [ ebp + 0358h ] ;0x00441e3c : 8dbd58030000
; call Fun546c56 ;0x00441e42 : e80f4e1000
; lea eax , dword ptr [ ebp + 0250h ] ;0x00441e47 : 8d8550020000
; call Fun488609 ;0x00441e4d : e8b7670400
mov dword ptr vfpa_packdbf_packdbf_cnt,00h
Label441e3d ::
lea edi , dword ptr [ ebp + 0358h ]
call Fun546c56
test eax , eax
je Label441e47
mov ecx,dword ptr vfpa_sys9048_data
inc dword ptr vfpa_packdbf_packdbf_cnt
cmp dword ptr vfpa_packdbf_packdbf_cnt,ecx
ja Label441e47
push dword ptr vfpa_sys9074_data
call Sleep
jmp Label441e3d
Label441e47 ::
mov dword ptr vfpa_packdbf_packdbf_cnt,00h
Label441e48 ::
lea eax , dword ptr [ ebp + 0250h ]
call Fun488609
test eax , eax
je Label441e52
mov ecx,dword ptr vfpa_sys9048_data
inc dword ptr vfpa_packdbf_packdbf_cnt
cmp dword ptr vfpa_packdbf_packdbf_cnt,ecx
ja Label441e52
push dword ptr vfpa_sys9074_data
call Sleep
jmp Label441e48
Label441e52 ::
mov ebx , dword ptr [ ebp - 48 ] ;0x00441e52 : 8b5dd0
mov edi , eax ;0x00441e55 : 8bf8
call Fun41de4e ;0x00441e57 : e8f2bffdff
mov ebx , eax ;0x00441e5c : 8bd8
mov eax , dword ptr [ ebp - 40 ] ;0x00441e5e : 8b45d8
pushd 080004h ;0x00441e61 : 6804000800
push dword ptr [ ebp - 8 ] ;0x00441e66 : ff75f8
lea edx , dword ptr [ ebp + 0128h ] ;0x00441e69 : 8d9528010000
mov ecx , ebx ;0x00441e6f : 8bcb
mov dword ptr [ ebp + 0470h ] , ebx ;0x00441e71 : 899d70040000
mov dword ptr [ ebx + 68 ] , eax ;0x00441e77 : 894344
call Fun53170a ;0x00441e7a : e88bf80e00
test edi , edi ;0x00441e7f : 85ff
jne Label5c42c0 ;0x00441e81 : 0f8539241800
push dword ptr [ ebp + 0 ] ;0x00441e87 : ff7500
mov edi , dword ptr [ebx] ;0x00441e8a : 8b3b
push esi ;0x00441e8c : 56
call Fun441efb ;0x00441e8d : e869000000
mov dword ptr [ edi + 104 ] , eax ;0x00441e92 : 894768
mov eax , dword ptr [ebx] ;0x00441e95 : 8b03
lea ecx , dword ptr [ ebp + 24 ] ;0x00441e97 : 8d4d18
push ecx ;0x00441e9a : 51
mov ecx , dword ptr [ eax + 104 ] ;0x00441e9b : 8b4868
call Fun441db6 ;0x00441e9e : e813ffffff
test eax , eax ;0x00441ea3 : 85c0
mov dword ptr [ ebx + 52 ] , eax ;0x00441ea5 : 894334
jne Label5c42c8 ;0x00441ea8 : 0f851a241800
Label441eae ::
pushd 00h ;0x00441eae : 6a00
push ebx ;0x00441eb0 : 53
call Fun4d16fb ;0x00441eb1 : e845f80800
mov eax , dword ptr [ ebp - 56 ] ;0x00441eb6 : 8b45c8
mov ecx , dword ptr [ ebp - 32 ] ;0x00441eb9 : 8b4de0
push dword ptr [ ebp - 36 ] ;0x00441ebc : ff75dc
mov dword ptr [ ebx + 76 ] , eax ;0x00441ebf : 89434c
mov eax , dword ptr [ ebp - 28 ] ;0x00441ec2 : 8b45e4
mov dword ptr [ ebx + 80 ] , eax ;0x00441ec5 : 894350
mov eax , dword ptr [ebx] ;0x00441ec8 : 8b03
shl ecx , 011h ;0x00441eca : c1e111
xor ecx , dword ptr [ eax + 32 ] ;0x00441ecd : 334820
mov esi , ebx ;0x00441ed0 : 8bf3
and ecx , 020000h ;0x00441ed2 : 81e100000200
xor dword ptr [ eax + 32 ] , ecx ;0x00441ed8 : 314820
mov eax , dword ptr [ ebp - 12 ] ;0x00441edb : 8b45f4
call Fun41dd89 ;0x00441ede : e8a6befdff
mov eax , dword ptr [ebx] ;0x00441ee3 : 8b03
mov ecx , dword ptr [ ebp - 16 ] ;0x00441ee5 : 8b4df0
mov dword ptr [ eax + 0C0h ] , ecx ;0x00441ee8 : 8988c0000000
mov eax , dword ptr [ebx] ;0x00441eee : 8b03
mov ecx , dword ptr [ ebp - 24 ] ;0x00441ef0 : 8b4de8
mov dword ptr [ eax + 80 ] , ecx ;0x00441ef3 : 894850
jmp Label4ec48b ;0x00441ef6 : e990a50a00
4. APPLIES TO:
VFP 6.0.8167.0
VFP 6.0.8961.0 (SP5)
VFP 7.0.0.9262
VFP 7.0.0.9465 (SP1)
VFP 8.0.0.2521
VFP 8.0.0.3117 (SP1)
VFP 9.0.0.2412
VFP 9.0.0.3504 (SP1)
VFP 9.0.0.4611 (SP2)
VFP 9.0.0.5015 (SP2)
VFP 9.0.0.5411 (SP2)
VFP 9.0.0.5721 (SP2)
VFP 9.0.0.5815 (SP2)
VFP 9.0.0.6303 (SP2)
VFP 9.0.0.6602 (SP2)
VFP 9.0.0.7423 (SP2)
The bug has been fixed in VFP Advanced.
IMPORTANT NOTE:
The following commands and functions have been fixed for the pack dbf function:
PACK command
COMPILE command
MODIFY CLASS command
MODIFY PROJECT command: check project
BUILD command: check project
SOURCE CONTROL: check project
RESOURCE FILE: check resource file
; for the pack dbf function, please refer to the following pseudo code:
;
; * temp.dbf is a temporary file name, for example, 000001aa000a.tmp.
;
; use test.dbf
; copy to temp.dbf for !dele()
; use
;
; delete file test.dbf && if delete file failed, it will try many (SYS(9048)) times again.
;
; rename temp.dbf to test.dbf && if rename file failed, it will try many (SYS(9048)) times again.
;
; * there is no any changes for the memo file test.fpt.
5. REFERENCE WEBSITES:
1, baiyujia.com:
http://www.baiyujia.com
http://www.baiyujia.com/vfpdocuments/f_vfp9fix147.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix65.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix66.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix67.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix68.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix69.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix70.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix71.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix72.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix73.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix74.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix84.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix85.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix107.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix108.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix109.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix110.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix143.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix144.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix145.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix146.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix149.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix150.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix203.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix261.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix262.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix269.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix270.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix278.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix279.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix348.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix349.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix350.asp
http://www.baiyujia.com/vfpdocuments/f_vfp9fix351.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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