Using static immutable Exceptions (or other way for NON-GC exceptions)

[Iain Buclaw via D.gnu]

On 18 February 2015 at 11:57, Liran Zvibel via D.gnu
<d.gnu at puremagic.com> wrote:
> Hi,
>
> We would like to use exceptions in some cases, but we don't want to allocate
> them when we send them.
> What we do with dmd is create bunch of "static immutable Throwable" members
> in our objects during creation (for every possible case), then we just throw
> these members in the code.
>
> When compiling with GDC we get a segfault in the code that tries to generate
> the backtrace.
>
> We will start investigate this now so we can create a bug report, I would
> just like to ask whether anyone else has seen this behavior, and what is the
> recommended way to raise an exception without GC allocations in GDC.
>

You can't throw without a GC allocation currently.  I'm open to
suggestions and patches welcome.

See here:  https://github.com/D-Programming-GDC/GDC/blob/master/libphobos/libdruntime/gcc/deh.d#L152


Iain.