Replace exception handler?

[Ali Çehreli]

On 02/27/2014 05:24 AM, Remo wrote:

 > Unfortunately I can not find a way to replace exception handler in D2.
 > Is there a way to do this?

I think you mean the unhandled exception handler. Otherwise, try+catch 
is the way to provide a handler. ;) I think that would not be the 
solution as it would kick in when the application (druntime?) was going 
down; hence it would be too late anyway.

 > The problem is that I load a Dll coded in D from Application coded in 
C++.
 > If this Dll throw and exception then there is no way to handle it from
 > the Application.

One way is to wrap every API function in a try+catch block on the dll 
side and return an error code and message. Not very pretty. :-/

Further, there may be a thin C++ layer that converts the error code and 
message to a C++ exception so that the C++ code need not deal with error 
codes. (I would definitely do this.)

 > Application will crash without any way to figure out where the D
 > exception was thrown.

One solution for that is to log a stack trace at the point of exception 
construction. We used libunwind in a C++ project but I haven't done 
anything similar in D.

Ali