【超市管理系统源码下载】【图片文字转换源码】【叮咚recovery源码制作】suspendthread源码
1.易语言暂停多个进程
2.ART 深入浅出 - 为何 Thread.getStackTrace() 会崩溃?
3.ç¨vb6å¯ä¸å¯ä»¥è®¾è®¡å¤çº¿ç¨åºçåºç¨ç¨åºï¼å¦ä½å®ç°
易语言暂停多个进程
OpenProcess 取得 process handle 2.CreateToolhelpSnapshot 得到一个snapshot 3.然后调 ThreadFirst,ThreadNext 取线程
源码:.版本 2.DLL命令 暂停线程, 整数型, "kernel.dll", "SuspendThread" .参数 hThread, 整数型, , 线程句柄.DLL命令 恢复线程, 整数型, "kernel.dll", "ResumeThread", , 解除挂起 .参数 hThread, , , 线程句柄.DLL命令 创建线程, 整数型, "kernel.dll", "CreateThread" .参数 lpThreadAttributes, 整数型 .参数 dwStackSize, 整数型 .参数 子程序指针, 子程序指针 .参数 参数, 整数型 .参数 dwCreationFlags, 整数型 .参数 线程ID, 整数型, 传址.DLL命令 销毁线程, , "kernel.dll", "TerminateThread" .参数 线程ID, 整数型 .参数 dwExitCode, 整数型
ART 深入浅出 - 为何 Thread.getStackTrace() 会崩溃?
ART 深入浅出:Thread.getStackTrace() 崩溃原因剖析
Thread.getStackTrace() 在卡顿检测中常被调用,但频繁调用可能导致崩溃,崩溃堆栈通常显示为:VMStack_getThreadStackTrace() -> ThreadList::SuspendThreadByPeer() 等。本文将逐步解析其崩溃机制。超市管理系统源码下载
在 ART (Android Runtime) 的源码 Android 版本中,VMStack.cc 的 GetThreadStack 函数是关键,它涉及线程挂起和回调生成调用栈的过程。首先,通过 SuspendThreadByPeer() 函数挂起线程,然后回调生成调用栈,最后恢复线程。图片文字转换源码然而,这个过程可能因超时引发问题,例如当 SuspendThreadByPeer() 在线程状态检查中判断线程未挂起时,超时会触发 ThreadSuspendByPeerWarning(),严重时会导致 Runtime::Abort。叮咚recovery源码制作
通常,使用 ThreadList::SuspendThreadByThreadId() 函数可以避免这种 Crash,因为它在超时后只会产生警告,而不是终止。超时时间默认为 秒,织梦源码网站如果线程长时间未能挂起,可能源于 ART 挂起线程的机制。在旧版 ART 中,挂起线程通过 ModifySuspendCount() 函数设置标志位,但在新版本中,手机QQ界面源码这个逻辑已有所改变。
深入探究,Java 的 Check Point 概念在其中起关键作用。解释执行的 switch/case 语句和机器码执行都有检查点,这些检查点会暂停线程执行,进行垃圾回收、调试等操作。当 Thread.getStackTrace() 触发挂起时,会进入 CheckSuspend() 函数,依据状态标志位决定挂起或执行检查点。真正的挂起操作会在析构函数中执行,通过 wait 函数挂起线程,直到其他线程执行到唤醒操作。
总结来说,Thread.getStackTrace() 崩溃源于线程挂起操作与检查点执行的同步问题。当线程未能及时进入检查点,getStackTrace() 的等待时间过长,从而导致崩溃。理解了这个机制,就能避免此类问题的发生。
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Option Explicit
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Private Sub Command1_Click()
On Error Resume Next
With myThreadleft
.Initialize AddressOf Fillleft 'ä¼ éè¿ç¨å°åç»çº¿ç¨
.ThreadEnabled = True
End With
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.Initialize AddressOf Fillright
.ThreadEnabled = True
End With
With myThreadbottom
.Initialize AddressOf Fillbottom
.ThreadEnabled = True
End With
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Set myThreadleft = Nothing
Set myThreadright = Nothing
Set myThreadbottom = Nothing
End Sub
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Private Sub Command2_Click()
Unload Me
End Sub
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Option Explicit
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Private Declare Function GetTickCount Lib "kernel" () As Long
'声æcls_threadç±»ç对象åé
Public myThreadleft As New cls_thread, myThreadright As New cls_thread, myThreadbottom As New cls_thread
Sub Main()
Load Form1
Form1.Show
End Sub
Public Sub Fillleft()
Static Bkgcolor As Long
Dim LongTick As Long, Longcounter As Long
On Error Resume Next
For Longcounter = 0 To
DoEvents
Bkgcolor = Longcounter Mod
Form1.Picture1.BackColor = RGB(Bkgcolor, 0, 0)
LongTick = GetTickCount
While GetTickCount - LongTick < '延æ¶æ¯«ç§,ä¸å
Wend
Next
Set myThreadleft = Nothing 'å¦æ循ç¯ç»æåç»æ¢å½å线ç¨è¿è¡ï¼ä¸å
End Sub
Public Sub Fillright()
Static Bkgcolor As Long
Dim LongTickValue As Long, Longcounter As Long
On Error Resume Next
For Longcounter = 0 To
DoEvents
Bkgcolor = Longcounter Mod
Form1.Picture2.BackColor = RGB(0, Bkgcolor, 0)
LongTickValue = GetTickCount
While GetTickCount - LongTickValue <
Wend
Next
Set myThreadright = Nothing
End Sub
Public Sub Fillbottom()
Static Bkgcolor As Long
Dim LongTick As Long, Longcounter As Long
On Error Resume Next
For Longcounter = 0 To
DoEvents
Bkgcolor = Longcounter Mod
Form1.Picture3.BackColor = RGB(0, 0, Bkgcolor)
LongTick = GetTickCount
While GetTickCount - LongTick <
Wend
Next
Set myThreadright = Nothing
End Sub
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'åè½ï¼å建å¤çº¿ç¨ç±»ï¼ç¨äºåå§å线ç¨ã ç±»åï¼cls_Thread
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' 2.è°ç¨å½¢å¼ï¼With mythread
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' .ThreadEnabled = True '(设置线ç¨æ¯å¦æ¿æ´»)
' End With
' 3.ç»æ¢è°ç¨ï¼ Set mythread = Nothing
' Crate By : éå® On .5. Copyright(C).Ldt By CY-soft --
' Email:4y4ycoco@.com
' Test Onï¼ VB6.0+Win AND VB6.0+WinXP It's Pass ï¼
Option Explicit
'å建线ç¨API
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Private Declare Function CreateThread Lib "kernel" (ByVal lpThreadAttributes As Any, ByVal dwStackSize As Long, ByVal lpStartAddress As Long, lpParameter As Any, ByVal dwCreationFlags As Long, LpthreadId As Long) As Long
'ç»æ¢çº¿ç¨API
Private Declare Function TerminateThread Lib "kernel" (ByVal hThread As Long, ByVal dwExitCode As Long) As Long
'æ¿æ´»çº¿ç¨API
Private Declare Function ResumeThread Lib "kernel" (ByVal hThread As Long) As Long
'æ起线ç¨API
Private Declare Function SuspendThread Lib "kernel" (ByVal hThread As Long) As Long
Private Const CREATE_SUSPENDED = &H4 '线ç¨æ起常é
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Private Type udtThread
Handle As Long
Enabled As Boolean
End Type
Private meTheard As udtThread
'åå§å线ç¨
Public Sub Initialize(ByVal LongPointFunction As Long)
Dim LongStackSize As Long, LongCreationFlags As Long, LpthreadId As Long, LongNull As Long
On Error Resume Next
LongNull = 0
LongStackSize = 0
LongCreationFlags = CREATE_SUSPENDED 'å建线ç¨åå æèµ·ï¼ç±ç¨åºæ¿æ´»çº¿ç¨
'å建线ç¨å¹¶è¿çº¿ç¨å¥æ
meTheard.Handle = CreateThread(LongNull, LongStackSize, ByVal LongPointFunction, LongNull, LongCreationFlags, LpthreadId)
If meTheard.Handle = LongNull Then
MsgBox "线ç¨å建失败ï¼", , "é误"
End If
End Sub
'è·å线ç¨æ¯å¦æ¿æ´»å±æ§
Public Property Get ThreadEnabled() As Boolean
On Error Resume Next
Enabled = meTheard.Enabled
End Property
'设置线ç¨æ¯å¦æ¿æ´»å±æ§
Public Property Let ThreadEnabled(ByVal Newvalue As Boolean)
On Error Resume Next
'è¥æ¿æ´»çº¿ç¨ï¼Newvalue为çï¼è®¾ä¸ºTRUEä¸æ¤çº¿ç¨åæ¥æ²¡ææ¿æ´»æ¶æ¿æ´»æ¤çº¿ç¨
If Newvalue And (Not meTheard.Enabled) Then
ResumeThread meTheard.Handle
meTheard.Enabled = True
Else 'è¥æ¿æ´»çº¿ç¨ï¼Newvalue为çï¼ä¸æ¤çº¿ç¨åæ¥å·²æ¿æ´»åæèµ·æ¤çº¿ç¨
If meTheard.Enabled Then
SuspendThread meTheard.Handle
meTheard.Enabled = False
End If
End If
End Property
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Private Sub Class_Terminate()
On Error Resume Next
Call TerminateThread(meTheard.Handle, 0)
End Sub