1
我想運行由我的教授編寫的代碼。不幸的是,當我編譯和運行代碼,結果:x86彙編堆內存分配
INCLUDE Irvine32.inc
.data
ARRAY_SIZE = 1000
FILL_VAL EQU 0FFh
hHeap HANDLE ? ;Handle to the process heap
pArray DWORD ? ;pointer to block of memory
newHeap DWORD ? ;handle to new heap
str1 BYTE "Heap size is: ",0
GetProcessHeap PROTO
.code
main PROC
INVOKE GetProcessHeap ;get handle prog's heap
.IF eax = NULL ;If failed, display message
call WriteWindowsMsg
jmp quit
.ELSE
mov hHeap, eax ;success
.ENDIF
call allocate_array
jnc arrayOk ;failed (CF = 1)?
call WriteWindowsMsg
call Crlf
jmp quit
arrayOk:
call fill_array
call display_array
call Crlf
;free the array
INVOKE HeapFree, hHeap, 0, pArray
quit:
exit
main ENDP
;-------------------------------------------------------
allocate_array PROC USES eax
;
;Dynamically allocates space for the array
;Receives: EAX = handle to the program heap
;Returns: CF = 0 if the memory allocation succeeds
;-------------------------------------------------------
INVOKE HeapAlloc, hHeap, HEAP_ZERO_MEMORY, ARRAY_SIZE
.IF eax == NULL
stc ;return with CF = 1
.ELSE
mov pArray, eax ;save the pointer
clc ;return with CF = 0
.ENDIF
ret
allocate_array ENDP
;--------------------------------------------------------
fill_array PROC USES ecx edx esi
;
;Fills all array positions with a single character
;Receives: nothing
;Returns: nothing
;---------------------------------------------------------
mov ecx, ARRAY_SIZE ;loop counter
mov esi, pArray ;point to the array
L1: mov BYTE PTR [esi], FILL_VAL ;fill each byte
inc esi ;next location
loop L1
ret
fill_array ENDP
;---------------------------------------------------------
display_array PROC USES eax ebx ecx esi
; Displays the array
; Receives: nothing
; Returns: nothing
mov ecx, ARRAY_SIZE ;loop counter
mov esi, pArray ;point to the array
L1: mov al, [esi] ;get a byte
mov ebx, TYPE BYTE
call WriteHexB ;display it
inc esi ;next location
loop L1
ret
display_array ENDP
END main
以下結果:
bobnew.asm(41) : error A2006: undefined symbol : HeapFree
bobnew.asm(56) : error A2006: undefined symbol : HeapAlloc
bobnew.asm(22) : error A2006: undefined symbol : WriteWindowsMsg
bobnew.asm(30) : error A2006: undefined symbol : WriteWindowsMsg
bobnew.asm(97) : error A2006: undefined symbol : WriteHexB
有人能解釋這是爲什麼。謝謝。我也很好奇堆內存分配以及Invoke
和處理程序和Proto
如何協同工作。我知道堆是用於動態內存分配的內存,與堆棧不同,沒有設置內存如何分配或釋放的模式。您可以隨時隨機分配和釋放分配內存,隨時釋放分配的內存。另外,與堆棧不同,必須手動銷燬堆內存以防止內存。
不幸的是,我嘗試了這個建議,它沒有奏效。謝謝。 –