• Jens Mueller <jens.k.mueller gmx.de> Nov 17 2010
• Sean Kelly <sean invisibleduck.org> Nov 21 2010
• Jens Mueller <jens.k.mueller gmx.de> Nov 21 2010

Jens Mueller <jens.k.mueller gmx.de> writes:

Hi,

I've written a small module for debugging on Posix systems.
It uses raise(SIGTRAP) and a custom errorHandlerType with
setAssertHandler. But setAssertHandler is deprecated.
Why is it deprecated? How should I do it instead?

I want to do it generally for Error and Exception. Don't know how yet.
How do you debug your programs? I've read that gdb has catch throw for
C++ to break when exceptions are thrown. I don't like changing gdb for
this.
My idea is that instead of throwing an Error/Exception I print it and
then raise SIGTRAP.

Jens

Sean Kelly <sean invisibleduck.org> writes:

Jens Mueller <jens.k.mueller gmx.de> wrote:
 Hi,
 
 I've written a small module for debugging on Posix systems.
 It uses raise(SIGTRAP) and a custom errorHandlerType with
 setAssertHandler. But setAssertHandler is deprecated.
 Why is it deprecated? How should I do it instead?
 
 I want to do it generally for Error and Exception. Don't know how yet.
 How do you debug your programs? I've read that gdb has catch throw for
 C++ to break when exceptions are thrown. I don't like changing gdb for
 this.
 My idea is that instead of throwing an Error/Exception I print it and
 then raise SIGTRAP.


It's deprecated because DMD doesn't generate a valid call stack when
generating an assert, so if you try to return from the assert handler
instead of throwing the app will crash.

Jens Mueller <jens.k.mueller gmx.de> writes:

Sean Kelly wrote:
 Jens Mueller <jens.k.mueller gmx.de> wrote:
 Hi,
 
 I've written a small module for debugging on Posix systems.
 It uses raise(SIGTRAP) and a custom errorHandlerType with
 setAssertHandler. But setAssertHandler is deprecated.
 Why is it deprecated? How should I do it instead?
 
 I want to do it generally for Error and Exception. Don't know how yet.
 How do you debug your programs? I've read that gdb has catch throw for
 C++ to break when exceptions are thrown. I don't like changing gdb for
 this.
 My idea is that instead of throwing an Error/Exception I print it and
 then raise SIGTRAP.


 It's deprecated because DMD doesn't generate a valid call stack when
 generating an assert, so if you try to return from the assert handler
 instead of throwing the app will crash.


Thanks.
That explains my segmentation fault. Is there going to be an alternative
way of doing it? Shouldn't one fix the problem in dmd instead of
deprecating the handler? In the meantime I will try using gdb reverse
debugging.

Jens