Here is my class
namespace MyNamespace
{
public class MyClass
{
private byte[] imageBytes = null;
public MyClass() { }
public void LoadImage(string filePath)
{
Image img = Image.FromFile(filePath);
using (MemoryStream mStream = new MemoryStream())
{
img.Save(mStream, img.RawFormat);
imageBytes = mStream.ToArray();
}
}
public void RemoveImage()
{
imageBytes = null;
}
}
}
And that's how it was used
static void Main(string[] args)
{
MyClass mc = new MyClass();
mc.LoadImage(@"C:\Images\myImage.jpg");
Console.WriteLine("take process dump now...");
Console.Read();
mc.RemoveImage();
}
I run the program and take a snapshot of the process. Not surprisingly, this is what I found about MyClass links.
0:000> !DumpHeap -type MyClass
Address MT Size
0000000002b92e08 000007fe73423a20 24
Statistics:
MT Count TotalSize Class Name
000007fe73423a20 1 24 MyNamespace.MyClass
Total 1 objects
0:000> !GCRoot 0000000002b92e08
Thread 3b3c:
00000000004eef90 000007fe7354011f MyTestApp.Program.Main(System.String[]) [c:\Projects\MyTestApp\Program.cs @ 17]
caller.rsp-30: 00000000004eefb0
-> 0000000002b92e08 MyNamespace.MyClass
Found 1 unique roots (run '!GCRoot -all' to see all roots).
Now I would like to see if I can get the same roots for the MyClass instance that is present in the same dump file using the CLR MD. For this, I use the GCRoot sample. One of the inputs to this application is ulong obj . I'm not sure how to get this for an instance of MyClass, so I did this in the following code in the main GCRoot sample method.
foreach (ulong obj2 in heap.EnumerateObjects())
{
ClrType type2 = heap.GetObjectType(obj2);
if (type2.Name.StartsWith("MyNamespace.MyClass") )
obj = obj2;
}
Thus, I see that obj is getting a valid value, but the problem is that the next line of code does not find node, as it always returns NULL.
Node path = FindPathToTarget(heap, root);
, MyClass . .