StackOverflowEx ception with attribute

[=?Utf-8?B?d2luZHNpbQ==?=]

Hi,
I have a project based on .Net 1.1 and VS 2003,now I am trying to upgrade it
to .Net 2.0 and VS 2005.The project passes the 'Build Solution',but When I
start Debug, it suddenly comes StackOverflowEx ception and Debug stops.

The main Exception point is the function below:

public System.Componen tModel.Property DescriptorColle ction
GetStatefulProp ertyDescriptors ()
{
DataObject.Stat efulPropertyAtt ribute a = new
StatefulPropert yAttribute();
return this.GetPropert ies(new Attribute[] { a }); //exception point
//class System.Attribut e that is base class for customer attributes
}

[AttributeUsage( AttributeTarget s.Property, AllowMultiple=f alse,
Inherited=true)]
public class StatefulPropert yAttribute : Attribute{}

Under .Net 1.1 and VS 2003 there is no problem, no exception for the
function, but why does it come StackOverflowEx ception under .Net 2.0 and How
to solve it?

--
windsim

[Marc Gravell]

Well, how is this.GetPropert ies(...) implemented? Is this an
ICustomTypeDesc riptor implementation? If so, what are you calling? It
should normally be something like
TypeDescriptor. GetProperties(G etType()) or (GetType(), attributes)...

Marc

[Nicholas Paldino [.NET/C# MVP]]

windsim,

Well, more likely than not you have a recursive call somewhere (or
something that results in an endless loop of calls). Have you set a
breakpoint and looked a the call stack to see where the calls are repeating
in a loop?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"windsim" <wi*****@discus sions.microsoft .comwrote in message
news:AB******** *************** ***********@mic rosoft.com...

Hi,
I have a project based on .Net 1.1 and VS 2003,now I am trying to upgrade
it
to .Net 2.0 and VS 2005.The project passes the 'Build Solution',but When I
start Debug, it suddenly comes StackOverflowEx ception and Debug stops.

The main Exception point is the function below:

public System.Componen tModel.Property DescriptorColle ction
GetStatefulProp ertyDescriptors ()
{
DataObject.Stat efulPropertyAtt ribute a = new
StatefulPropert yAttribute();
return this.GetPropert ies(new Attribute[] { a }); //exception point
//class System.Attribut e that is base class for customer attributes
}

[AttributeUsage( AttributeTarget s.Property, AllowMultiple=f alse,
Inherited=true)]
public class StatefulPropert yAttribute : Attribute{}

Under .Net 1.1 and VS 2003 there is no problem, no exception for the
function, but why does it come StackOverflowEx ception under .Net 2.0 and
How
to solve it?

--
windsim

[=?Utf-8?B?d2luZHNpbQ==?=]

this.GetPropert ies(...) is a member function of class
PropertyDescrip torCollection:
public PropertyDescrip torCollection GetProperties(A ttribute[] attributes){... }

where

class PropertyDescrip torCollection : IList, IDictionary, ICollection,
IEnumerable
--
windsim
"Marc Gravell" wrote:

Well, how is this.GetPropert ies(...) implemented? Is this an
ICustomTypeDesc riptor implementation? If so, what are you calling? It
should normally be something like
TypeDescriptor. GetProperties(G etType()) or (GetType(), attributes)...

Marc

[atlaste]

On May 11, 3:04 pm, windsim <wind...@discus sions.microsoft .comwrote:

this.GetPropert ies(...) is a member function of class
PropertyDescrip torCollection:
public PropertyDescrip torCollection GetProperties(A ttribute[] attributes){... }

where

class PropertyDescrip torCollection : IList, IDictionary, ICollection,
IEnumerable
--
windsim

"Marc Gravell" wrote:

Well, how is this.GetPropert ies(...) implemented? Is this an
ICustomTypeDesc riptor implementation? If so, what are you calling? It
should normally be something like
TypeDescriptor. GetProperties(G etType()) or (GetType(), attributes)...

Marc

The overflow exception is caused by the recursion depth that exceeds a
threshold value. If I understand this code correctly you should try
increasing this max recursion depth to solve the problem.

Cheers,
Stefan.

[=?Utf-8?B?d2luZHNpbQ==?=]

Thanks guys!

public PropertyDescrip torCollection GetProperties(A ttribute[] attributes)
{
PropertyDescrip torCollection globalizedProps ;
PropertyDescrip torCollection baseProps =
TypeDescriptor. GetProperties(t his, attributes, true);
....
}
I can not set break point at above code line and I think the problem is
maybe TypeDescriptor. GetProperties(. ..)

The info from call stack looks like a endless loop below :
....
[External Code]

SystemFramework s.dll!SystemFra meworks.DataObj ect.GlobalizedO bject.GetProper ties(System.Att ribute[] attributes = {Dimensions:[1]}) Line 350 + 0xd bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetStatef ulPropertyDescr iptors() Line 92 + 0x26 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetModule PropertyListCur rent(SystemFram eworks.DataObje ct.ModuleProper ties
mp = {SystemFramewor ks.DataObject.D TMProperties}) Line 122 + 0x8 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.ToString( )
Line 350 + 0xb bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetHashCo de() Line 313 + 0x7 bytes C#
[External Code]

by the way how to increase this max recursion depth in VS 2005?
--
windsim
"Nicholas Paldino [.NET/C# MVP]" wrote:

windsim,

Well, more likely than not you have a recursive call somewhere (or
something that results in an endless loop of calls). Have you set a
breakpoint and looked a the call stack to see where the calls are repeating
in a loop?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"windsim" <wi*****@discus sions.microsoft .comwrote in message
news:AB******** *************** ***********@mic rosoft.com...

Hi,
I have a project based on .Net 1.1 and VS 2003,now I am trying to upgrade
it
to .Net 2.0 and VS 2005.The project passes the 'Build Solution',but When I
start Debug, it suddenly comes StackOverflowEx ception and Debug stops.

The main Exception point is the function below:

public System.Componen tModel.Property DescriptorColle ction
GetStatefulProp ertyDescriptors ()
{
DataObject.Stat efulPropertyAtt ribute a = new
StatefulPropert yAttribute();
return this.GetPropert ies(new Attribute[] { a }); //exception point
//class System.Attribut e that is base class for customer attributes
}

[AttributeUsage( AttributeTarget s.Property, AllowMultiple=f alse,
Inherited=true)]
public class StatefulPropert yAttribute : Attribute{}

Under .Net 1.1 and VS 2003 there is no problem, no exception for the
function, but why does it come StackOverflowEx ception under .Net 2.0 and
How
to solve it?

--
windsim

[Nicholas Paldino [.NET/C# MVP]]

I don't know what atlaste was trying to indicate by saying to raise the
maximum recursion depth, because in the end, if you have a loop that loops
infinitely, it's always going to be larger than whatever the threshold is.

To me, it would seem that the call to GetProperties on the
TypeDescriptor class is calling back into your GetProperities method, and
it's always going to instantiate another call.

You need to find some way to break this loop. What is it that you are
trying to do?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"windsim" <wi*****@discus sions.microsoft .comwrote in message
news:2C******** *************** ***********@mic rosoft.com...

Thanks guys!

public PropertyDescrip torCollection GetProperties(A ttribute[] attributes)
{
PropertyDescrip torCollection globalizedProps ;
PropertyDescrip torCollection baseProps =
TypeDescriptor. GetProperties(t his, attributes, true);
...
}
I can not set break point at above code line and I think the problem is
maybe TypeDescriptor. GetProperties(. ..)

The info from call stack looks like a endless loop below :
...
[External Code]

SystemFramework s.dll!SystemFra meworks.DataObj ect.GlobalizedO bject.GetProper ties(System.Att ribute[]
attributes = {Dimensions:[1]}) Line 350 + 0xd bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetStatef ulPropertyDescr iptors()
Line 92 + 0x26 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetModule PropertyListCur rent(SystemFram eworks.DataObje ct.ModuleProper ties
mp = {SystemFramewor ks.DataObject.D TMProperties}) Line 122 + 0x8 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.ToString( )
Line 350 + 0xb bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetHashCo de()
Line 313 + 0x7 bytes C#
[External Code]

by the way how to increase this max recursion depth in VS 2005?
--
windsim
"Nicholas Paldino [.NET/C# MVP]" wrote:

>windsim,

Well, more likely than not you have a recursive call somewhere (or
something that results in an endless loop of calls). Have you set a
breakpoint and looked a the call stack to see where the calls are
repeating
in a loop?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"windsim" <wi*****@discus sions.microsoft .comwrote in message
news:AB******* *************** ************@mi crosoft.com...

Hi,
I have a project based on .Net 1.1 and VS 2003,now I am trying to
upgrade
it
to .Net 2.0 and VS 2005.The project passes the 'Build Solution',but
When I
start Debug, it suddenly comes StackOverflowEx ception and Debug stops.

The main Exception point is the function below:

public System.Componen tModel.Property DescriptorColle ction
GetStatefulProp ertyDescriptors ()
{
DataObject.Stat efulPropertyAtt ribute a = new
StatefulPropert yAttribute();
return this.GetPropert ies(new Attribute[] { a }); //exception
point
//class System.Attribut e that is base class for customer
attributes
}

[AttributeUsage( AttributeTarget s.Property, AllowMultiple=f alse,
Inherited=true)]
public class StatefulPropert yAttribute : Attribute{}

Under .Net 1.1 and VS 2003 there is no problem, no exception for the
function, but why does it come StackOverflowEx ception under .Net 2.0
and
How
to solve it?

--
windsim

[=?Utf-8?B?d2luZHNpbQ==?=]

One more thing: This is an implementation of the ICustomTypeDesc riptor
interface, class name is GlobalizedObjec t.

Thia whole loop starts when some external code calls the GetHashCode() of my
object of type DTMProperties (inherits from ModulePropertie s, inherits from
GlobalizedObjec t). The stack trace shows below shows that my
ModulePropertie s.GetHashCode() method calls ModulePropertie s.ToString().

The ToString method calls the GlobalizedObjec t.GetProperties (...) method in
order to return the name/value pairs of all properties that have a special
attribute.

The code that now executes does the following:

public PropertyDescrip torCollection GetProperties(A ttribute[] attributes)
{
PropertyDescrip torCollection globalizedProps ;
PropertyDescrip torCollection baseProps =
TypeDescriptor. GetProperties(t his, attributes, true);
....
}

The next thing happening according to the stack trace, is that we call into
some external code (probably the TypeDescriptor. GetProperties(. ..)), and then
we get back into the GetHashCode. Thus an infinite loop.

So the question is whether the .NET 2.0 implementation of
TypeDescriptor. GetProperties(. ..) calls the GetHashCode method for some
reason now? And was that not the case in 1.1?

Here is a more readable version of my stack trace:
..... (it just repeats itself from here)
[External Code]
SystemFramework s.DataObject.Gl obalizedObject. GetProperties(S ystem.Attribute[] attributes = {Dimensions:[1]})
SystemFramework s.DataObject.Mo duleProperties. GetStatefulProp ertyDescriptors ()
SystemFramework s.DataObject.Mo duleProperties. GetModuleProper tyListCurrent(S ystemFrameworks .DataObject.Mod uleProperties
mp = {SystemFramewor ks.DataObject.D TMProperties})
SystemFramework s.DataObject.Mo duleProperties. ToString()
SystemFramework s.DataObject.Mo duleProperties. GetHashCode()
[External Code]

SystemFramework s.DataObject.Gl obalizedObject. GetProperties(S ystem.Attribute[]
attributes = {Dimensions:[1]})
SystemFramework s.DataObject.Mo duleProperties. GetStatefulProp ertyDescriptors ()
SystemFramework s.DataObject.Mo duleProperties. GetModuleProper tyListCurrent(S ystemFrameworks .DataObject.Mod uleProperties
mp = {SystemFramewor ks.DataObject.D TMProperties})
SystemFramework s.DataObject.Mo duleProperties. ToString()
SystemFramework s.DataObject.Mo duleProperties. GetHashCode()
[External Code]

--
windsim
"windsim" wrote:

Thanks guys!

public PropertyDescrip torCollection GetProperties(A ttribute[] attributes)
{
PropertyDescrip torCollection globalizedProps ;
PropertyDescrip torCollection baseProps =
TypeDescriptor. GetProperties(t his, attributes, true);
...
}
I can not set break point at above code line and I think the problem is
maybe TypeDescriptor. GetProperties(. ..)

The info from call stack looks like a endless loop below :
...
[External Code]

SystemFramework s.dll!SystemFra meworks.DataObj ect.GlobalizedO bject.GetProper ties(System.Att ribute[] attributes = {Dimensions:[1]}) Line 350 + 0xd bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetStatef ulPropertyDescr iptors() Line 92 + 0x26 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetModule PropertyListCur rent(SystemFram eworks.DataObje ct.ModuleProper ties
mp = {SystemFramewor ks.DataObject.D TMProperties}) Line 122 + 0x8 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.ToString( )
Line 350 + 0xb bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetHashCo de() Line 313 + 0x7 bytes C#
[External Code]

by the way how to increase this max recursion depth in VS 2005?
--
windsim
"Nicholas Paldino [.NET/C# MVP]" wrote:

windsim,

Well, more likely than not you have a recursive call somewhere (or
something that results in an endless loop of calls). Have you set a
breakpoint and looked a the call stack to see where the calls are repeating
in a loop?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"windsim" <wi*****@discus sions.microsoft .comwrote in message
news:AB******** *************** ***********@mic rosoft.com...

Hi,
I have a project based on .Net 1.1 and VS 2003,now I am trying to upgrade
it
to .Net 2.0 and VS 2005.The project passes the 'Build Solution',but When I
start Debug, it suddenly comes StackOverflowEx ception and Debug stops.
>
The main Exception point is the function below:
>
public System.Componen tModel.Property DescriptorColle ction
GetStatefulProp ertyDescriptors ()
{
DataObject.Stat efulPropertyAtt ribute a = new
StatefulPropert yAttribute();
return this.GetPropert ies(new Attribute[] { a }); //exception point
//class System.Attribut e that is base class for customer attributes
}
>
[AttributeUsage( AttributeTarget s.Property, AllowMultiple=f alse,
Inherited=true)]
public class StatefulPropert yAttribute : Attribute{}
>
Under .Net 1.1 and VS 2003 there is no problem, no exception for the
function, but why does it come StackOverflowEx ception under .Net 2.0 and
How
to solve it?
>
--
windsim

[atlaste]

I figured that the recursion wasn't infinite (but just deep). Since
semantics of methods (like GetProperties) change that could explain
the behaviour (it worked in 1.1 but not in 2.0). Changing the max
recursion depth not only helps to identify the problem in that
particular case but also helps to solve the special case problem. I
used to have these kind of problems all the time...

However, it seems like it's the GetHashCode that makes the thing
infinite so you were right after all.

I can think of a dozen reasons why they opted for using GetHashCode in
2.0 and not in 1.1. After all, the features of the language evolved. I
would make a new implementation of getHashcode and equals.

Cheers,
Stefan.
On May 11, 4:00 pm, "Nicholas Paldino [.NET/C# MVP]"
<[e-mail] d.caspershouse. comwrote:

I don't know what atlaste was trying to indicate by saying to raise the
maximum recursion depth, because in the end, if you have a loop that loops
infinitely, it's always going to be larger than whatever the threshold is.

To me, it would seem that the call to GetProperties on the
TypeDescriptor class is calling back into your GetProperities method, and
it's always going to instantiate another call.

You need to find some way to break this loop. What is it that you are
trying to do?

--
- Nicholas Paldino [.NET/C# MVP]
- [e-mail] .caspershouse.c om

"windsim" <wind...@discus sions.microsoft .comwrote in message

news:2C******** *************** ***********@mic rosoft.com...

Thanks guys!

public PropertyDescrip torCollection GetProperties(A ttribute[] attributes)
{
PropertyDescrip torCollection globalizedProps ;
PropertyDescrip torCollection baseProps =
TypeDescriptor. GetProperties(t his, attributes, true);
...
}
I can not set break point at above code line and I think the problem is
maybe TypeDescriptor. GetProperties(. ..)

The info from call stack looks like a endless loop below :
...
[External Code]

SystemFramework s.dll!SystemFra meworks.DataObj ect.GlobalizedO bject.GetProper ties(System.Att ribute[]
attributes = {Dimensions:[1]}) Line 350 + 0xd bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetStatef ulPropertyDescr iptors()
Line 92 + 0x26 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetModule PropertyListCur rent(SystemFram eworks.DataObje ct.ModuleProper ties
mp = {SystemFramewor ks.DataObject.D TMProperties}) Line 122 + 0x8 bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.ToString( )
Line 350 + 0xb bytes C#

SystemFramework s.dll!SystemFra meworks.DataObj ect.ModulePrope rties.GetHashCo de()
Line 313 + 0x7 bytes C#
[External Code]

by the way how to increase this max recursion depth in VS 2005?
--
windsim

"Nicholas Paldino [.NET/C# MVP]" wrote:

windsim,

Well, more likely than not you have a recursive call somewhere (or
something that results in an endless loop of calls). Have you set a
breakpoint and looked a the call stack to see where the calls are
repeating
in a loop?

--
- Nicholas Paldino [.NET/C# MVP]
- [e-mail] .caspershouse.c om

"windsim" <wind...@discus sions.microsoft .comwrote in message
news:AB******* *************** ************@mi crosoft.com...
Hi,
I have a project based on .Net 1.1 and VS 2003,now I am trying to
upgrade
it
to .Net 2.0 and VS 2005.The project passes the 'Build Solution',but
When I
start Debug, it suddenly comes StackOverflowEx ception and Debug stops.

The main Exception point is the function below:

public System.Componen tModel.Property DescriptorColle ction
GetStatefulProp ertyDescriptors ()
{
DataObject.Stat efulPropertyAtt ribute a = new
StatefulPropert yAttribute();
return this.GetPropert ies(new Attribute[] { a }); //exception
point
//class System.Attribut e that is base class for customer
attributes
}

[AttributeUsage( AttributeTarget s.Property, AllowMultiple=f alse,
Inherited=true)]
public class StatefulPropert yAttribute : Attribute{}

Under .Net 1.1 and VS 2003 there is no problem, no exception for the
function, but why does it come StackOverflowEx ception under .Net 2.0
and
How
to solve it?

--
windsim

[Marc Gravell]

MGWell, how is this.GetPropert ies(...) implemented? Is this an
MGICustomTypeDe scriptor implementation?
---
wthis.GetProper ties(...) is a member function of class
wPropertyDescri ptorCollection:
wpublic PropertyDescrip torCollection GetProperties(A ttribute[]
attributes){... }
---
wThis is an implementation of the ICustomTypeDesc riptor
winterface, class name is GlobalizedObjec t.
---
Why didn't you say that the first time? Anyways... in the general
case, I would *definitely* be treating this as a huge warning sign;
you shouldn't be coming anywhere *near* blowing the stack just to read
metadata. For reference, I still think there is a loop in here: your
ICustomTypeDesc riptor implementation uses the *instance* form of
TypeDescriptor. GetProperties.. . and the first thing that does is ask
"does this instance implement ICustomTypeDesc riptor? If so, call that
instead..." - which is why I posted about using the *Type* form of
TypeDescriptor. GetProperties.

Actually, to avoid this hell, I quite like tke 2.0 approach of
TypeDescription Provider; this allows you to delegate metadata
provision to a separate class (helping keep each class targetted to
doing one job) - but more importantly it makes the distinction between
the *instance* and *Type* forms disappear; your CustomTypeDescr iptor
subclass can of course choose whether to care about instances or not.

Marc