Stack Size

[Ben R. Bolton]

The documentation indicates that the threads "default stack size" is 1MB.
The work "default" implies that it can be changed.

Is it possible to change the StackSize in .NET? If so how?

Is it possible to determine the amount of memory used in the current stack?

Any assistance would be appreciated.

Ben

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

Ben,

Unfortunately no. The documentation you were reading was for the
creation of new threads in the system, which is handled by the Thread class.
The CreateThread API function allows you to set the stack size and you can
call it from .NET. However, I don't know if that is a good idea, since I am
not sure how the runtime will perceive that thread.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- nick(dot)paldin o=at=exisconsul ting<dot>com

"Ben R. Bolton" <xb*******@hotm ail.com> wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..

The documentation indicates that the threads "default stack size" is 1MB.
The work "default" implies that it can be changed.

Is it possible to change the StackSize in .NET? If so how?

Is it possible to determine the amount of memory used in the current stack?
Any assistance would be appreciated.

Ben

[Ben R. Bolton]

Thanks Nicholas,

I hadassumed it couldn't be changed since I could find no reference as to
how to change it. But wanted to ask anyway.

Is it possible to determine how much of the 1MB of memory is currently being
used (is on the stack)?

Ben

"Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com> wrote
in message news:eO******** ******@TK2MSFTN GP09.phx.gbl...

Ben,

Unfortunately no. The documentation you were reading was for the
creation of new threads in the system, which is handled by the Thread class. The CreateThread API function allows you to set the stack size and you can
call it from .NET. However, I don't know if that is a good idea, since I am not sure how the runtime will perceive that thread.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- nick(dot)paldin o=at=exisconsul ting<dot>com

"Ben R. Bolton" <xb*******@hotm ail.com> wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..

The documentation indicates that the threads "default stack size" is 1MB. The work "default" implies that it can be changed.

Is it possible to change the StackSize in .NET? If so how?

Is it possible to determine the amount of memory used in the current

stack?

Any assistance would be appreciated.

Ben

[Jeffrey Tan[MSFT]]

Hi Ben,

It seems that there is no easy way to get the current used stack size of
the thread.
May be you can refer to the NtQueryInformat ionThread DDK function to get
the information of specified thread.
Because it is a DDK function, you must install the DDK first.

Hope this helps,

Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

--------------------
| Reply-To: "Ben R. Bolton" <xb*******@hotm ail.com>
| From: "Ben R. Bolton" <xb*******@hotm ail.com>
| References: <#o************ **@TK2MSFTNGP09 .phx.gbl>
<eO************ **@TK2MSFTNGP09 .phx.gbl>
| Subject: Re: Stack Size
| Date: Tue, 7 Oct 2003 12:48:13 -0700
| Lines: 51
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|
| Thanks Nicholas,
|
| I hadassumed it couldn't be changed since I could find no reference as to
| how to change it. But wanted to ask anyway.
|
| Is it possible to determine how much of the 1MB of memory is currently
being
| used (is on the stack)?
|
| Ben
|
|
|
| "Nicholas Paldino [.NET/C# MVP]" <ni************ **@exisconsulti ng.com>
wrote
| in message news:eO******** ******@TK2MSFTN GP09.phx.gbl...
| > Ben,
| >
| > Unfortunately no. The documentation you were reading was for the
| > creation of new threads in the system, which is handled by the Thread
| class.
| > The CreateThread API function allows you to set the stack size and you
can
| > call it from .NET. However, I don't know if that is a good idea, since
I
| am
| > not sure how the runtime will perceive that thread.
| >
| > Hope this helps.
| >
| >
| > --
| > - Nicholas Paldino [.NET/C# MVP]
| > - nick(dot)paldin o=at=exisconsul ting<dot>com
| >
| > "Ben R. Bolton" <xb*******@hotm ail.com> wrote in message
| > news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..
| > > The documentation indicates that the threads "default stack size" is
| 1MB.
| > > The work "default" implies that it can be changed.
| > >
| > > Is it possible to change the StackSize in .NET? If so how?
| > >
| > > Is it possible to determine the amount of memory used in the current
| > stack?
| > >
| > > Any assistance would be appreciated.
| > >
| > > Ben
| > >
| > >
| >
| >
|
|
|

[Mattias Sjögren]

Ben,

Is it possible to change the StackSize in .NET? If so how?

Editbin.exe /stack

should work, I think.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/
Please reply only to the newsgroup.

[Alan Pretre]

"Mattias Sjögren" <ma************ ********@mvps.o rg> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..

Ben,

Is it possible to change the StackSize in .NET? If so how?

Editbin.exe /stack
should work, I think.

That works.

Test:

class App {
private static long _Depth = 0;

private static void GoDeep() {
if ((++_Depth % 10000) == 0) System.Console. WriteLine("Dept h is " +
_Depth.ToString ());
GoDeep();
return;
}

public static void Main() {
try {
GoDeep();
} finally {
}
return;
}
}


editbin /stack:100000,10 00 q.exe
Depth is 10000
Depth is 20000

Unhandled Exception: StackOverflowEx ception.

editbin /stack:1000000,1 000 q.exe
Depth is 10000
Depth is 20000
Depth is 30000
Depth is 40000
Depth is 50000
Depth is 60000
Depth is 70000
Depth is 80000

Unhandled Exception: StackOverflowEx ception.
-- Alan

[Jeffrey Tan[MSFT]]

Hi Alan,

Yes, that should work, I have found Editbin may be useful for change the
stack size, but I have not had time to test for it.
Thanks for you test code.

Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

--------------------
| Reply-To: "Alan Pretre" <no@spam>
| From: "Alan Pretre" <no@spam>
| References: <#o************ **@TK2MSFTNGP09 .phx.gbl>
<#p************ **@TK2MSFTNGP11 .phx.gbl>
| Subject: Re: Stack Size
| Date: Thu, 9 Oct 2003 11:56:23 -0500
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|
| "Mattias Sjögren" <ma************ ********@mvps.o rg> wrote in message
| news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..
| > Ben,
| > >Is it possible to change the StackSize in .NET? If so how?
| > Editbin.exe /stack
| > should work, I think.
|
| That works.
|
| Test:
|
| class App {
| private static long _Depth = 0;
|
| private static void GoDeep() {
| if ((++_Depth % 10000) == 0) System.Console. WriteLine("Dept h is " +
| _Depth.ToString ());
| GoDeep();
| return;
| }
|
| public static void Main() {
| try {
| GoDeep();
| } finally {
| }
| return;
| }
| }
|
|
|
|
| editbin /stack:100000,10 00 q.exe
| Depth is 10000
| Depth is 20000
|
| Unhandled Exception: StackOverflowEx ception.
|
| editbin /stack:1000000,1 000 q.exe
| Depth is 10000
| Depth is 20000
| Depth is 30000
| Depth is 40000
| Depth is 50000
| Depth is 60000
| Depth is 70000
| Depth is 80000
|
| Unhandled Exception: StackOverflowEx ception.
|
|
| -- Alan
|
|
|

[Ben R. Bolton]

Thanks Mattias,

I had hoped there was a compiler option, but at least there is a way.

Ben
"Mattias Sjögren" <ma************ ********@mvps.o rg> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..

Ben,

Is it possible to change the StackSize in .NET? If so how?

Editbin.exe /stack

should work, I think.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/
Please reply only to the newsgroup.

[Fred Mellender]

If the answer is not too arcane can someone explain to me why the stack size
had to be set at compile/load time. Why did the c# designers not grow it
as required in virtual memory, which (so far as I know) is done by most
other language implementations , and let an "out of memory" exception occur?

In an object oriented language where most objects are allocated on the heap,
perhaps it is not so important. Nevertheless, some problems are most easily
coded as a recursive function and, if even a few value types are used, a 1MB
stack does not seem like much.

E.G. (not too realistic, maybe, given that a double would not hold the
answer anyway):
public static double fact(double x)

{

if (x <= 0)

return 1;

return x *fact(x-1);

}

overflows when fact(35000) is called. ("An unhandled exception of type
'System.StackOv erflowException ' occurred in Foo.exe"). So less than 35000
recursive calls can occur in a function that uses type double as a
parameter?

"Ben R. Bolton" <xb*******@hotm ail.com> wrote in message
news:OG******** ******@TK2MSFTN GP09.phx.gbl...

Thanks Mattias,

I had hoped there was a compiler option, but at least there is a way.

Ben
"Mattias Sjögren" <ma************ ********@mvps.o rg> wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..

Ben,

Is it possible to change the StackSize in .NET? If so how?

Editbin.exe /stack

should work, I think.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/
Please reply only to the newsgroup.

[Jeffrey Tan[MSFT]]

Hi Fred,

The stack is set to an arbitrarily small value when the program is first
loaded. The stack then grows on demand to meet the needs of the thread.
This is implemented by placing a page with PAGE_GUARD access at the end of
the current stack. When your code causes the stack pointer to point to an
address on this page, an exception occurs. The system will commit your
desired page. The 1M was the default maximum stack size that can be commit.

To work around the recursive problem, you can handle the over flow
exception, commit more page yourself, for more details please refer to
"Trapping the Exception with __try and __except (Full Solution)" in the
link below:
http://support.microsoft.com/default...b;en-us;315937

Hope this helps,
Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

--------------------
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|
| If the answer is not too arcane can someone explain to me why the stack
size
| had to be set at compile/load time. Why did the c# designers not grow it
| as required in virtual memory, which (so far as I know) is done by most
| other language implementations , and let an "out of memory" exception
occur?
|
| In an object oriented language where most objects are allocated on the
heap,
| perhaps it is not so important. Nevertheless, some problems are most
easily
| coded as a recursive function and, if even a few value types are used, a
1MB
| stack does not seem like much.
|
| E.G. (not too realistic, maybe, given that a double would not hold the
| answer anyway):
| public static double fact(double x)
|
| {
|
| if (x <= 0)
|
| return 1;
|
| return x *fact(x-1);
|
| }
|
| overflows when fact(35000) is called. ("An unhandled exception of type
| 'System.StackOv erflowException ' occurred in Foo.exe"). So less than 35000
| recursive calls can occur in a function that uses type double as a
| parameter?
|
| "Ben R. Bolton" <xb*******@hotm ail.com> wrote in message
| news:OG******** ******@TK2MSFTN GP09.phx.gbl...
| > Thanks Mattias,
| >
| > I had hoped there was a compiler option, but at least there is a way.
| >
| > Ben
| >
| >
| > "Mattias Sjögren" <ma************ ********@mvps.o rg> wrote in message
| > news:%2******** ********@TK2MSF TNGP11.phx.gbl. ..
| > > Ben,
| > >
| > > >Is it possible to change the StackSize in .NET? If so how?
| > >
| > > Editbin.exe /stack
| > >
| > > should work, I think.
| > >
| > >
| > >
| > > Mattias
| > >
| > > --
| > > Mattias Sjögren [MVP] mattias @ mvps.org
| > > http://www.msjogren.net/dotnet/
| > > Please reply only to the newsgroup.
| >
| >
|
|
|