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[64BIT...] VFP 9.0 FIX - SYS(9084) RETURNS THE AMOUNT OF LARGE MEMORY USED
January 2024
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CCB
1. THE SYS(9084) FUNCTION:
SYS(9084) - Returns the amount of large memory used
Returns the amount of large memory used.
SYS(9084 [, nMemoryID])
Parameters
nMemoryID
Specifies the Memory ID.
The following list contains the Memory IDs supported in Visual FoxPro Advanced 10.2 or later:
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| nMemoryID | Memory Description |
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| 1 | The maximum count of memory used in Visual FoxPro Large Memory Manager. |
| 2 | The count of memory used in Visual FoxPro Large Memory Manager. |
| 3 | The amount of memory used in Visual FoxPro Large Memory Manager. |
| 4 | The maximum count of memory used in the current process. |
| 5 | The count of memory used in the current process. |
| 6 | The amount of memory used in the current process. |
| 7 | The maximum count of temp memory used in the current process. |
| 8 | The count of temp memory used in the current process. |
| 9 | The amount of temp memory used in the current process. |
| 10 | The using file data buffer maximum count in the current process. |
| 11 | The using file data buffer count in the current process. |
| 12 | The using file data buffer size in the current process (SYS(1105)). |
| 13 | Large memory object memory use. |
| 14 | The maximum count of VFPAWE memory used in the current process. |
| 15 | The count of VFPAWE memory used in the current process. |
| 16 | The amount of VFPAWE memory used in the current process. |
| 17 | The maximum count of VFPLMD memory used in the current process. |
| 18 | The count of VFPLMD memory used in the current process. |
| 19 | The amount of VFPLMD memory used in the current process. |
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Return Value
Character
Remarks
SYS(9084) ALWAYS returns "0" in Visual FoxPro Advanced 10.0 and 10.1.
SYS(9084) returns the amount of large memory used in Visual FoxPro Advanced 10.2 or later,
SYS(9084) = SYS(9084,3) + SYS(9084,16) + SYS(9084,19).
SYS(3050, nType, nBuffMemSize) returns nBuffMemSize in Visual FoxPro Advanced 10.0 and 10.1.
SYS(3050, nType, nBuffMemSize) returns nBuffMemSize + the number of processes for Visual FoxPro Large Memory Manager * 2 GB
in Visual FoxPro Advanced 32-bit 10.2 or later.
SYS(3050, nType, nBuffMemSize) returns nBuffMemSize + the maximum buffer memory size in Visual FoxPro Large Memory Manager
in Visual FoxPro Advanced 64-bit 10.2 or later.
SYS(1001) returns 4 * 256 MB = 1 GB in Visual FoxPro Advanced 10.0 and 10.1.
SYS(1001) returns four times the total amount of physical memory in Visual FoxPro Advanced 10.2 or later.
SYS(1101) returns the maximum buffer memory size.
When Visual FoxPro is running in the foreground, SYS(1101) returns SYS(3050,1).
When Visual FoxPro is running in the background, SYS(1101) returns SYS(3050,2).
SYS(1102) returns the using buffer memory size.
SYS(1103) returns the using buffer memory size - the cached virtual memory size (it can be purged in Visual FoxPro Advanced 10.0 or later).
SYS(1104) Purges Cached Memory.
SYS(1104) does not purge cached virtual memory in Visual FoxPro earlier versions.
SYS(1104) purges cached virtual memory in Visual FoxPro Advanced 10.0 or later.
SYS(1105) returns the file data buffer memory size.
SYS(1105,1) returns the using file data buffer size (low address memory) of all opened files.
SYS(1105,2) returns the using file data buffer size (large memory) of all opened files.
2. CAUSE:
There are some BUGs in the following code.
3. RESOLUTION:
We can write some code to fix the BUG.
Fun529fca :: ; proc near
push ebp ;0x00529fca : 55
mov ebp , esp ;0x00529fcb : 8bec
pushd 0FFFFFFFFh ;0x00529fcd : 6aff
pushd offset Data922268 ;0x00529fcf : 6868229200
pushd offset Label9160f9 ;0x00529fd4 : 68f9609100
mov eax , dword ptr fs:[00h] ;0x00529fd9 : 64a100000000
push eax ;0x00529fdf : 50
mov dword ptr fs:[00h] , esp ;0x00529fe0 : 64892500000000
push ecx ;0x00529fe7 : 51
push ecx ;0x00529fe8 : 51
mov eax , 02FBCh ;0x00529fe9 : b8bc2f0000
call Fun42c118 ;0x00529fee : e82521f0ff
mov eax , dword ptr [ Data937090 ] ;0x00529ff3 : a190709300
mov dword ptr [ ebp - 28 ] , eax ;0x00529ff8 : 8945e4
push ebx ;0x00529ffb : 53
push esi ;0x00529ffc : 56
push edi ;0x00529ffd : 57
mov dword ptr [ ebp - 24 ] , esp ;0x00529ffe : 8965e8
xor edi , edi ;0x0052a001 : 33ff
mov dword ptr [ ebp + 0FFFFD114h ] , edi ;0x0052a003 : 89bd14d1ffff
push edi ;0x0052a009 : 57
pushd 02710h ;0x0052a00a : 6810270000
push edi ;0x0052a00f : 57
mov ebx , dword ptr [ ebp + 8 ] ;0x0052a010 : 8b5d08
mov eax , ebx ;0x0052a013 : 8bc3
call Fun529bc5 ;0x0052a015 : e8abfbffff
mov dword ptr [ ebp + 0FFFFD0E4h ] , eax ;0x0052a01a : 8985e4d0ffff
mov dword ptr [ ebp + 0FFFFD10Ch ] , edi ;0x0052a020 : 89bd0cd1ffff
lea ecx , dword ptr [ ebp + 0FFFFFDE0h ] ;0x0052a026 : 8d8de0fdffff
mov dword ptr [ ebp + 0FFFFD100h ] , ecx ;0x0052a02c : 898d00d1ffff
mov byte ptr [ ebp + 0FFFFFDE0h ] , 00h ;0x0052a032 : c685e0fdffff00
movsx eax , ax ;0x0052a039 : 0fbfc0
;
; -------------------------------------------------------------------------
; VFP 9.0 FIX - SYS(9084) RETURNS THE AMOUNT OF LARGE MEMORY USED
; May 2020
; -------------------------------------------------------------------------
; CCB
;
; SYS(9084) - Returns the amount of large memory used.
;
; 2020/5/15, by ccb
;
cmp eax,9084
je vfpa_sys9084_start
pushd 064h ;0x0052a03c : 6a64
pop esi ;0x0052a03e : 5e
cmp eax , esi ;0x0052a03f : 3bc6
jle Label52a0d0 ;0x0052a041 : 0f8e89001000
mov ecx , 07EAh ;0x0052a047 : b9ea070000
cmp eax , ecx ;0x0052a04c : 3bc1
jg Label52a164 ;0x0052a04e : 0f8f10010000
je Label609b33 ;0x0052a054 : 0f84d9fa0d00
mov ecx , 04F6h ;0x0052a05a : b9f6040000
cmp eax , ecx ;0x0052a05f : 3bc1
jle Label52b6e0 ;0x0052a061 : 0f8e79160000
mov ecx , 07DBh ;0x0052a067 : b9db070000
cmp eax , ecx ;0x0052a06c : 3bc1
jg Label51f355 ;0x0052a06e : 0f8fe152ffff
je Label609700 ;0x0052a074 : 0f8486f60d00
add ecx , 0FFFFFFF9h ;0x0052a07a : 83c1f9
cmp eax , ecx ;0x0052a07d : 3bc1
jg Label4a4938 ;0x0052a07f : 0f8fb3a8f7ff
je Label4f6b07 ;0x0052a085 : 0f847ccafcff
sub eax , 04F7h ;0x0052a08b : 2df7040000
je Label60951e ;0x0052a090 : 0f8488f40d00
dec eax ;0x0052a096 : 48
je Label60950f ;0x0052a097 : 0f8472f40d00
sub eax , 0E4h ;0x0052a09d : 2de4000000
je Label609492 ;0x0052a0a2 : 0f84eaf30d00
sub eax , 01F4h ;0x0052a0a8 : 2df4010000
jne Label462026 ;0x0052a0ad : 0f85737ff3ff
lea eax , dword ptr [ ebp + 0FFFFFDE0h ] ;0x0052a0b3 : 8d85e0fdffff
push eax ;0x0052a0b9 : 50
push dword ptr [ ebp + 12 ] ;0x0052a0ba : ff750c
mov edx , ebx ;0x0052a0bd : 8bd3
call Fun4dc923 ;0x0052a0bf : e85f28fbff
4. APPLIES TO:
VFP 10 (VFP Advanced)
5. REFERENCE WEBSITES:
1, baiyujia.com:
http://www.baiyujia.com
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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