我相信 Windows 确实有一个堆栈，当您到达末尾时它会增长。
在 Visual Studio 编译器中，负责此操作的代码位于chkstk.obj module.
由于此代码是开源的，我可以将其发布在这里：
;***
;_chkstk - check stack upon procedure entry
;
;Purpose:
; Provide stack checking on procedure entry. Method is to simply probe
; each page of memory required for the stack in descending order. This
; causes the necessary pages of memory to be allocated via the guard
; page scheme, if possible. In the event of failure, the OS raises the
; _XCPT_UNABLE_TO_GROW_STACK exception.
;
; NOTE: Currently, the (EAX < _PAGESIZE_) code path falls through
; to the "lastpage" label of the (EAX >= _PAGESIZE_) code path. This
; is small; a minor speed optimization would be to special case
; this up top. This would avoid the painful save/restore of
; ecx and would shorten the code path by 4-6 instructions.
;
;Entry:
; EAX = size of local frame
;
;Exit:
; ESP = new stackframe, if successful
;
;Uses:
; EAX
;
;Exceptions:
; _XCPT_GUARD_PAGE_VIOLATION - May be raised on a page probe. NEVER TRAP
; THIS!!!! It is used by the OS to grow the
; stack on demand.
; _XCPT_UNABLE_TO_GROW_STACK - The stack cannot be grown. More precisely,
; the attempt by the OS memory manager to
; allocate another guard page in response
; to a _XCPT_GUARD_PAGE_VIOLATION has
; failed.
;
;*******************************************************************************
public _alloca_probe
_chkstk proc
_alloca_probe = _chkstk
push ecx
; Calculate new TOS.
lea ecx, [esp] + 8 - 4 ; TOS before entering function + size for ret value
sub ecx, eax ; new TOS
; Handle allocation size that results in wraparound.
; Wraparound will result in StackOverflow exception.
sbb eax, eax ; 0 if CF==0, ~0 if CF==1
not eax ; ~0 if TOS did not wrapped around, 0 otherwise
and ecx, eax ; set to 0 if wraparound
mov eax, esp ; current TOS
and eax, not ( _PAGESIZE_ - 1) ; Round down to current page boundary
cs10:
cmp ecx, eax ; Is new TOS
jb short cs20 ; in probed page?
mov eax, ecx ; yes.
pop ecx
xchg esp, eax ; update esp
mov eax, dword ptr [eax] ; get return address
mov dword ptr [esp], eax ; and put it at new TOS
ret
; Find next lower page and probe
cs20:
sub eax, _PAGESIZE_ ; decrease by PAGESIZE
test dword ptr [eax],eax ; probe page.
jmp short cs10
_chkstk endp
end
