C#中一些你可能沒用過的調試窗口的方法

2020-01-24 03:21:24

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來源：轉載

供稿：網友

首先說明：如果沒有進入調試模式的話，默認的調試窗口如下：

開始前的準備：

新建控制臺程序DebugWindowDemo：

修改Program.cs 的代碼為：

復制代碼代碼如下:

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();
    }