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我想运行由我的教授编写的代码。不幸的是,当我编译和运行代码,结果:x86汇编堆内存分配
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
以下结果:
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
有人能解释这是为什么。谢谢。我也很好奇堆内存分配以及Invoke
和处理程序和Proto
如何协同工作。我知道堆是用于动态内存分配的内存,与堆栈不同,没有设置内存如何分配或释放的模式。您可以随时随机分配和释放分配内存,随时释放分配的内存。另外,与堆栈不同,必须手动销毁堆内存以防止内存。
不幸的是,我尝试了这个建议,它没有奏效。谢谢。 –