[fpc-devel]some memory lost on exception

[Jonas Maebe]

On woensdag, januari 16, 2002, at 07:47 , Aleksey V. Vaneev wrote:

> ----
> uses SysUtils;
>
> begin
>     raise Exception.createFmt ('error %d', [1]);
> end.
> ----
>
> This small program reports a memory loss when compiling with -glh.

The reason is that you create an object in the raise statement. This 
(exception) object is not caught, so the program terminates (without 
doing any kind of cleanup).

> In fact this maybe not a problem at all, but if these losses could be
> eliminated that would result in a simpler debugging.

The memory blocks that are left allocated are 1 for the exception 
object, one for the ansistring message and one for the exception stack. 
I don't think it would be smart to try to deallocate all those things 
when the program terminates because of an exception, since the exception 
can also be caused by memory corruption or so and in that case trying to 
free all memory would cause additional exceptions and would make 
debugging even more complex.

> I'm using go32v2 compiler v1.1 snapshot dated 12-jan-2002.

It also happens under 1.0.5.


Jonas