C#中一些你可能沒用過的調(diào)試窗口的方法
首先說明:如果沒有進入調(diào)試模式的話,默認(rèn)的調(diào)試窗口如下:
開始前的準(zhǔn)備:
新建控制臺程序DebugWindowDemo:
修改Program.cs 的代碼為:
using System;
using System.Threading;
using System.Threading.Tasks;
using System.Diagnostics;
class S
{
public static void Main()
{
pcount = Environment.ProcessorCount;
Console.WriteLine("Proc count = " + pcount);
ThreadPool.SetMinThreads(4, -1);
ThreadPool.SetMaxThreads(4, -1);
t1 = new Task(A, 1);
t2 = new Task(A, 2);
t3 = new Task(A, 3);
t4 = new Task(A, 4);
Console.WriteLine("Starting t1 " + t1.Id.ToString());
t1.Start();
Console.WriteLine("Starting t2 " + t2.Id.ToString());
t2.Start();
Console.WriteLine("Starting t3 " + t3.Id.ToString());
t3.Start();
Console.WriteLine("Starting t4 " + t4.Id.ToString());
t4.Start();
Console.ReadLine();
}
static void A(object o)
{
B(o);
}
static void B(object o)
{
C(o);
}
static void C(object o)
{
int temp = (int)o;
Interlocked.Increment(ref aa);
while (aa < 4)
{
}
if (temp == 1)
{
// BP1 - all tasks in C
Debugger.Break();
waitFor1 = false;
}
else
{
while (waitFor1)
{
}
}
switch (temp)
{
case 1:
D(o);
break;
case 2:
F(o);
break;
case 3:
case 4:
I(o);
break;
default:
Debug.Assert(false, "fool");
break;
}
}
static void D(object o)
{
E(o);
}
static void E(object o)
{
// break here at the same time as H and K
while (bb < 2)
{
}
//BP2 - 1 in E, 2 in H, 3 in J, 4 in K
Debugger.Break();
Interlocked.Increment(ref bb);
//after
L(o);
}
static void F(object o)
{
G(o);
}
static void G(object o)
{
H(o);
}
static void H(object o)
{
// break here at the same time as E and K
Interlocked.Increment(ref bb);
Monitor.Enter(mylock);
while (bb < 3)
{
}
Monitor.Exit(mylock);
//after
L(o);
}
static void I(object o)
{
J(o);
}
static void J(object o)
{
int temp2 = (int)o;
switch (temp2)
{
case 3:
t4.Wait();
break;
case 4:
K(o);
break;
default:
Debug.Assert(false, "fool2");
break;
}
}
static void K(object o)
{
// break here at the same time as E and H
Interlocked.Increment(ref bb);
Monitor.Enter(mylock);
while (bb < 3)
{
}
Monitor.Exit(mylock);
//after
L(o);
}
static void L(object oo)
{
int temp3 = (int)oo;
switch (temp3)
{
case 1:
M(oo);
break;
case 2:
N(oo);
break;
case 4:
O(oo);
break;
default:
Debug.Assert(false, "fool3");
break;
}
}
static void M(object o)
{
// breaks here at the same time as N and Q
Interlocked.Increment(ref cc);
while (cc < 3)
{
}
//BP3 - 1 in M, 2 in N, 3 still in J, 4 in O, 5 in Q
Debugger.Break();
Interlocked.Increment(ref cc);
while (true)
Thread.Sleep(500); // for ever
}
static void N(object o)
{
// breaks here at the same time as M and Q
Interlocked.Increment(ref cc);
while (cc < 4)
{
}
R(o);
}
static void O(object o)
{
Task t5 = Task.Factory.StartNew(P, TaskCreationOptions.AttachedToParent);
t5.Wait();
R(o);
}
static void P()
{
Console.WriteLine("t5 runs " + Task.CurrentId.ToString());
Q();
}
static void Q()
{
// breaks here at the same time as N and M
Interlocked.Increment(ref cc);
while (cc < 4)
{
}
// task 5 dies here freeing task 4 (its parent)
Console.WriteLine("t5 dies " + Task.CurrentId.ToString());
waitFor5 = false;
}
static void R(object o)
{
if ((int)o == 2)
{
//wait for task5 to die
while (waitFor5) { ;}
int i;
//spin up all procs
for (i = 0; i < pcount - 4; i++)
{
Task t = Task.Factory.StartNew(() => { while (true);});
Console.WriteLine("Started task " + t.Id.ToString());
}
Task.Factory.StartNew(T, i + 1 + 5, TaskCreationOptions.AttachedToParent); //scheduled
Task.Factory.StartNew(T, i + 2 + 5, TaskCreationOptions.AttachedToParent); //scheduled
Task.Factory.StartNew(T, i + 3 + 5, TaskCreationOptions.AttachedToParent); //scheduled
Task.Factory.StartNew(T, i + 4 + 5, TaskCreationOptions.AttachedToParent); //scheduled
Task.Factory.StartNew(T, (i + 5 + 5).ToString(), TaskCreationOptions.AttachedToParent); //scheduled
//BP4 - 1 in M, 2 in R, 3 in J, 4 in R, 5 died
Debugger.Break();
}
else
{
Debug.Assert((int)o == 4);
t3.Wait();
}
}
static void T(object o)
{
Console.WriteLine("Scheduled run " + Task.CurrentId.ToString());
}
static Task t1, t2, t3, t4;
static int aa = 0;
static int bb = 0;
static int cc = 0;
static bool waitFor1 = true;
static bool waitFor5 = true;
static int pcount;
static S mylock = new S();
}
按F5,開始運行:
由于Debugger.Break();
所以當(dāng)執(zhí)行到這里的時候,Debugger會中斷。
這個時候再看看調(diào)試窗口會發(fā)現(xiàn)多了幾個窗口:
點擊調(diào)試->窗口->并行任務(wù),界面如下:
按下F5,繼續(xù)運行:
雙擊查看相應(yīng)等待的任務(wù),就可以知道這個工作線程為什么等待了。
例如:
繼續(xù)按F5,運行,你應(yīng)該會看到:
總之關(guān)于當(dāng)前運行的并行任務(wù)你都可以看的到。
關(guān)閉程序,重新F5,進入調(diào)試模式
選擇調(diào)試->窗口->并行堆棧
可以看到:
其中藍線代表當(dāng)前正在執(zhí)行的線程。
如果右鍵點擊方法視圖的S.C ,可以看到右鍵菜單如下:
點擊切換方法視圖
可以看到:
關(guān)閉程序,重新F5,進入調(diào)試模式
點擊調(diào)試->窗口->線程:
可以看到:
當(dāng)前控制臺的所有線程都在這里。
在線程上點擊右鍵可以凍結(jié)線程:
凍結(jié)線程也就是Pause線程,
凍結(jié)的線程可以被解凍,也就是Resume。
其他的窗口:
調(diào)試->窗口->模塊:可以看到當(dāng)前程序加載的所有模塊。
調(diào)試->窗口->進程:
調(diào)試->窗口->反匯編:
調(diào)試->窗口->寄存器:
調(diào)試->窗口->調(diào)用堆棧:
調(diào)用堆棧窗口是比較常用的窗口:
上圖表示先調(diào)用A方法,接著B方法,接著C方法。
也可以認(rèn)為是C方法是B調(diào)用,而B方法是A調(diào)用的。
其他窗口比較常用,就不介紹了,是不是有一些你沒用到的窗口呢?
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