since a couple of days, I am unable to debug inside threads with Visual Studio 2005
Something simple like below, leads to the effect, that the first breakpoint inside the thread function is hit, and when I step over, the program throws an C++ exception which is not catched by managed code, disassembly of the exception location is below the code:
using
System;using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace WindowsApplication60
{
public partial class Form1 : Form
{
private Thread myThread = null;
public Form1()
{
InitializeComponent();
myThread = new Thread(new ThreadStart(Perform));
myThread.Start();
}
public void Perform()
{
int li = 0;
while (li < 100000)
{
++li;
Thread.Sleep(250);
}
}}}
7C920560 jne 7C94BD4D
7C920566 mov al,1
7C920568 call 7C91EE02
7C92056D ret 0Ch <= Exception, always at this location
I have tested this code on different machines, and some have the same problem with debugging it, others have no problem, so it seems PC related.
I was wondering if it was the effect of one of the latest security patches from MS
Any help is appreciated
Can't debug threads anymore
Vhradice
Thank you very much for the detailed explanation. I don't know why it had worked for me before, or why I don't have this problem on other PCs.
Anyway based on your explanation I created the workaround to declare the thread function as static, if the task allows this it helps too.
arsonist
Hi,
This is a known issue to do with func eval aka property evaluation and WinForms applications. To work around this you can disable Tools -> Options -> Debugging -> General -> Enable property evaluation and other implicit function calls.
More details on this issue can be found here http://blogs.msdn.com/greggm/archive/2005/11/18/494648.aspx.
We are looking at this issue and hope to have something for future releases.
Azeem Khan
Visual Studio Debugger.
Keith Chapman
the rest of the project is the unaltered default code you get when creating a new project in VS
by the way I can't debug other threads too, so the code provided is just a simple example to show that nothing complicated is needed to reproduce the behaviour
The forms window is visible during debugging
Fillipe246466
That sounds weird - sorry, no idea other than reinstalling VS comes to my mind.
--
SvenC
bilalso
Hi,
what is the code of your Main function Does it show the form Is the form still visible when you debug the other thread
--
SvenC