Delphi SetWindowsHookEx内螺纹不稳定
好的,伙计们,我会尽量用一种非常完整的形式来解释我的问题。我正在使用一个DLL注入另一个进程(使用VirtualAllocEx/WriteProcessMemory/CreateRemoteThread注入,但这并不重要),在入口点中运行时,此DLL只有一个功能:Delphi SetWindowsHookEx内螺纹不稳定,delphi,hook,Delphi,Hook,好的,伙计们,我会尽量用一种非常完整的形式来解释我的问题。我正在使用一个DLL注入另一个进程(使用VirtualAllocEx/WriteProcessMemory/CreateRemoteThread注入,但这并不重要),在入口点中运行时,此DLL只有一个功能: procedure EntryPoint(Reason: integer); begin if Reason = DLL_PROCESS_ATTACH then begin MyMainThread.Creat
procedure EntryPoint(Reason: integer);
begin
if Reason = DLL_PROCESS_ATTACH then
begin
MyMainThread.Create;
end
好的,我所有的工作都是在这个MyMainThread(TThread)中完成的。。。我在MyMainThread中所做的基本上是设置2个计时器,并使用SetWindowsHookEx(WH_keyboard_LL)钩住键盘事件。单独使用时一切正常,这是:或SetWindowsHookEx或2个计时器当我出于某种未知的原因将这两件事结合在一起时,钩子对键盘上键入的几个字符有效(少于10个),计时器只是停止,但MyMain线程不会终止。我在Windows 7/2008上的测试非常完美,但在Windows 2003中运行时问题就开始了。MyMainThread执行如下操作:
procedure MyMainThread.Execute;
begin
while not Terminated do
begin
MyThread:= Self;
StartKeyboardHook;
StartUp;
SetTimer(0, 0, 600000, @MyMainThread.ContactHome);
SetTimer(0, 0, 40000, @MyMainThread.MapProc);
CreateMessagePump;
end;
end;
这两个计时器和“启动”可以通过Indy doing POST/GET请求联系一个php,列出正在运行的进程,以及类似的事情。。。StartKeyboardHook很简单,如下所示:
procedure MyMainThread.StartKeyboardHook;
begin
if llKeyboardHook = 0 then
llKeyboardHook:= SetWindowsHookEx(WH_KEYBOARD_LL, @LowLevelKeyboardHook, HInstance, 0);
end;
正如您所看到的,这个StartKeyboardHook在MyMain线程中,而llKeyboardHook/LowLevelKeyboardHook是全局变量/方法。。。如果我把低水平的KeyboardHook程序放在线程中,就不要使用钩子。我相信问题不在我的低级键盘钩子(代码本身),因为正如我所说的,如果我不设置2个计时器,钩子工作得很好,但是如果你愿意,我可以在这里发布它。正如我所说,钩子是在线程内部启动的,但是回调过程和hhook变量是全局的(也许这就是问题所在)。。。CreateMessagePump(线程执行中的最后一个调用)过程对于计时器和钩子是必需的,因为它是低级钩子,我需要一个消息队列。为什么我会出现这种不稳定性(我的测试只在Win2k3中显示),如果我只放了没有计时器的键盘挂钩,或者只放了没有挂钩的计时器,一切都正常?
信息泵是:
procedure MyMainThread.CreateMessagePump;
var
AppMsg: TMsg;
begin
while GetMessage(AppMsg, 0, 0, 0) do
begin
TranslateMessage(AppMsg);
DispatchMessage(AppMsg);
end;
//if needed to quit this procedure use PostQuitMessage(0);
end;
首先:不推荐使用全局变量联系线程。。 您正在将LowLevelKeyboardHook用作全局过程。您应该将LowLevelKeyboardHook声明到主线程中: 不幸的是,您不能将回调函数声明为对象(类、对象、线程等),因此您需要将LowLevel KeyboardHook作为类函数,当然它应该是静态函数。(或者您可以使用MakeObjectInstance函数从回调函数创建对象。): 现在您可以设置挂钩:
llKeyboardHook := SetWindowsHookEx(WH_KEYBOARD_LL,
@TMyMainThread.LowLevelKeyboardHook, HInstance, 0);
第二:线程的execute方法永远运行,当它每次调用SetTimer时都运行。您应该只调用SetTimer一次
procedure TMyMainThread.Execute;
begin
while not Terminated do
begin
{Set FirstTime to true on TMyMainThread.Create}
if FirstTime then
begin
FirstTime := False;
SetTimer();
...
end;
end;
end;
首先:不推荐使用全局变量联系线程。。 您正在将LowLevelKeyboardHook用作全局过程。您应该将LowLevelKeyboardHook声明到主线程中: 不幸的是,您不能将回调函数声明为对象(类、对象、线程等),因此您需要将LowLevel KeyboardHook作为类函数,当然它应该是静态函数。(或者您可以使用MakeObjectInstance函数从回调函数创建对象。): 现在您可以设置挂钩:
llKeyboardHook := SetWindowsHookEx(WH_KEYBOARD_LL,
@TMyMainThread.LowLevelKeyboardHook, HInstance, 0);
第二:线程的execute方法永远运行,当它每次调用SetTimer时都运行。您应该只调用SetTimer一次
procedure TMyMainThread.Execute;
begin
while not Terminated do
begin
{Set FirstTime to true on TMyMainThread.Create}
if FirstTime then
begin
FirstTime := False;
SetTimer();
...
end;
end;
end;
首先是一些非常笼统的建议 你问了一个问题,你以前的问题,关于如何组织线程的Execute方法。我当时给你的答案是准确的。你应该注意它 在您就这个主题提出的每个问题上,Sertac和其他人都告诉您Win32回调函数声明不匹配的问题。看来你没有听从建议。您继续使用RTL和@operator提供的中断API声明。在前面的问题中,Sertac向您展示了如何纠正RTL声明的失败。如果无法检查回调是否匹配,则必须让编译器进行检查 您在评论中说您尝试了Sertac的类型安全设置计时器,但它“不起作用”。这是一个错误的诊断。塞塔克的代码工作得很好。您收到的错误来自编译器检查回调声明是否正确。因为它不是,编译器停止了。这是理想的行为。您选择忽略编译器、抑制错误并继续执行中断的回调。正确的回答应该是修复您的回调 对你来说,不断地问问题、接受建议、不听劝告,然后一遍又一遍地问同样的问题是毫无意义的。如果你想取得进展,就必须听从这些建议。为什么还要问你是否愿意那样做
关于这里的细节,我看到两个主要问题:
首先是一些非常笼统的建议 你问了一个问题,你以前的问题,关于如何组织线程的Execute方法。我当时给你的答案是准确的。你应该注意它 在您就这个主题提出的每个问题上,Sertac和其他人都告诉您Win32回调函数声明不匹配的问题。看来你没有听从建议。您继续使用损坏的API d
procedure TForm3.FTimerMethod(_hwnd: HWND; uMsg: UINT; idEvent: UINT_PTR;
dwTime: DWORD); stdcall;
begin
{ Note : you can not access function params correctly }
{ & you should use Form3.ListBox2.Items to access the ListBox
instead of ListBox2.Items .
}
{
this Code will not work :
ListBox2.Items.add(IntToStr(_hwnd)); !!!
}
Form3.ListBox2.Items.add(IntToStr(_hwnd));
end;
unit uTimer;
{uTimer Unit by S.Mahdi}
interface
uses Windows;
type
TTimerStruct = record
_hwnd: HWND;
uMsg: UINT;
idEvent: UINT_PTR;
dwTime: DWORD;
end;
type
TTimerMethod = procedure(var Message: TTimerStruct) of object;
function MakeTimerObjectInstance(const AMethod: TTimerMethod): Pointer;
procedure FreeTimerObjectInstance(ObjectInstance: Pointer);
implementation
type
PObjectInstance = ^TObjectInstance;
TObjectInstance = packed record
Code: Byte;
Offset: Integer;
case Integer of
0:
(Next: PObjectInstance);
1:
(FMethod: TMethod);
end;
const
{$IF Defined(CPUX86)}
CodeBytes = 2;
{$ELSEIF Defined(CPUX64)}
CodeBytes = 8;
{$ENDIF CPU}
InstanceCount = (4096 - SizeOf(Pointer) * 2 - CodeBytes)
div SizeOf(TObjectInstance) - 1;
type
PInstanceBlock = ^TInstanceBlock;
TInstanceBlock = packed record
Next: PInstanceBlock;
Code: array [1 .. CodeBytes] of Byte;
WndProcPtr: Pointer;
Instances: array [0 .. InstanceCount] of TObjectInstance;
end;
var
InstBlockList: PInstanceBlock;
InstFreeList: PObjectInstance;
function CalcJmpOffset(Src, Dest: Pointer): Longint;
begin
Result := IntPtr(Dest) - (IntPtr(Src) + 5);
end;
procedure StdTimerProc(_hwnd: HWND; uMsg: UINT; idEvent: UINT_PTR;
dwTime: DWORD); stdcall;
var
TimerStruct: TTimerStruct;
{$IF Defined(CPUX86)}
{ In ECX = Address of method pointer }
asm
PUSH EBX
PUSH EDX
MOV EBX,_hwnd
XOR EDX,EDX
LEA EDX,TimerStruct
MOV [EDX].TTimerStruct._hwnd,EBX;
MOV EBX,uMsg
MOV [EDX].TTimerStruct.uMsg,EBX;
MOV EBX,idEvent
MOV [EDX].TTimerStruct.idEvent,EBX;
MOV EBX,dwTime
MOV [EDX].TTimerStruct.dwTime,EBX;
PUSH EDX
MOV EAX,[ECX].Longint[4]
CALL [ECX].Pointer
POP EDX
POP EBX
(* XOR EAX,EAX
PUSH EAX
PUSH dwTime
PUSH idEvent
PUSH uMsg
PUSH _hwnd
MOV EDX,ESP
MOV EAX,[ECX].Longint[4]
CALL [ECX].Pointer
ADD ESP,16
POP EAX *)
end;
{$ELSEIF Defined(CPUX64)}
{ In R11 = Address of method pointer }
asm
.PARAMS 1
MOV TimerStruct._hwnd,_hwnd;
MOV TimerStruct.uMsg,uMsg;
MOV TimerStruct.idEvent,idEvent;
MOV TimerStruct.dwTime,dwTime;
LEA RDX,TimerStruct
PUSH RCX
PUSH R11
MOV RCX,[R11].TMethod.Data
CALL [R11].TMethod.Code
POP R11
POP RCX
end;
{$ENDIF CPUX64}
function MakeTimerObjectInstance(const AMethod: TTimerMethod): Pointer;
const
BlockCode: array [1 .. CodeBytes] of Byte = (
{$IF Defined(CPUX86)}
$59, { POP ECX }
$E9); { JMP StdTimerProc }
{$ELSEIF Defined(CPUX64)}
$41, $5B, { POP R11 }
$FF, $25, $00, $00, $00, $00)
; { JMP [RIP+0] }
{$ENDIF}
PageSize = 4096;
var
Block: PInstanceBlock;
Instance: PObjectInstance;
begin
if InstFreeList = nil then
begin
Block := VirtualAlloc(nil, PageSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
Block^.Next := InstBlockList;
Move(BlockCode, Block^.Code, SizeOf(BlockCode));
{$IF Defined(CPUX86)}
Block^.WndProcPtr := Pointer(CalcJmpOffset(@Block^.Code[2],
@StdTimerProc));
{$ELSEIF Defined(CPUX64)}
Block^.WndProcPtr := @StdTimerProc;
{$ENDIF}
Instance := @Block^.Instances;
repeat
Instance^.Code := $E8; { CALL NEAR PTR Offset }
Instance^.Offset := CalcJmpOffset(Instance, @Block^.Code);
Instance^.Next := InstFreeList;
InstFreeList := Instance;
Inc(PByte(Instance), SizeOf(TObjectInstance));
until IntPtr(Instance) - IntPtr(Block) >= SizeOf(TInstanceBlock);
InstBlockList := Block;
end;
Result := InstFreeList;
Instance := InstFreeList;
InstFreeList := Instance^.Next;
Instance^.FMethod := TMethod(AMethod);
end;
procedure FreeTimerObjectInstance(ObjectInstance: Pointer);
begin
if ObjectInstance <> nil then
begin
PObjectInstance(ObjectInstance)^.Next := InstFreeList;
InstFreeList := ObjectInstance;
end;
end;
end.
unit uMain;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls,
uTimer;
type
TForm3 = class(TForm)
Button1: TButton;
ListBox1: TListBox;
Button2: TButton;
ListBox2: TListBox;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
IDTimer, IDTimer2: DWORD;
FObj: Pointer;
procedure FTimerMethod(_hwnd: HWND; uMsg: UINT; idEvent: UINT_PTR;
dwTime: DWORD); stdcall;
procedure FTimerMethod2(var Message: TTimerStruct);
public
{ Public declarations }
end;
var
Form3: TForm3;
implementation
{$R *.dfm}
procedure TForm3.Button2Click(Sender: TObject);
begin
KillTimer(Handle, IDTimer);
FreeTimerObjectInstance(FObj);
end;
procedure TForm3.FTimerMethod(_hwnd: HWND; uMsg: UINT; idEvent: UINT_PTR;
dwTime: DWORD); stdcall;
begin
{ Note : you can not access function params correctly }
{ & you should use Form3.ListBox2.Items to access the ListBox
instead of ListBox2.Items .
}
{
this Code will not work :
ListBox2.Items.add(IntToStr(_hwnd)); !!!
}
Form3.ListBox2.Items.add(IntToStr(_hwnd));
end;
procedure TForm3.FTimerMethod2(var Message: TTimerStruct);
begin
ListBox1.Items.add(IntToStr(Message._hwnd));
end;
procedure TForm3.Button1Click(Sender: TObject);
begin
ReportMemoryLeaksOnShutdown := True;
FObj := MakeTimerObjectInstance(FTimerMethod2);
IDTimer := SetTimer(Handle, 0, 1000, FObj);
IDTimer2 := SetTimer(Handle, 1, 1000, @TForm3.FTimerMethod);
end;
end.