catching segfault using try_ catch

[seany]

On Tuesday, 13 July 2021 at 17:49:54 UTC, Adam D Ruppe wrote:
> On Tuesday, 13 July 2021 at 16:52:43 UTC, seany wrote:
>> What will it return to me?
>
> true if it succeeded.
>
>> I want to catch the segfault and a segfault has occured, I 
>> want run a different code at that point.
>
> You mean transparently rerun some code? That's better done with 
> the lowlevel sigaction handler.
>
> But if you just want to standard try/catch then do something in 
> the catch block, this is fine.
>
>
> import etc.linux.memoryerror;
>
> void main() {
>         registerMemoryErrorHandler();
>         int* a;
>         try {
>                 *a = 4;
>         } catch(Throwable e) {
>                 import std.stdio;
>                 writeln("Caught");
>         }
> }
>
>
> It can be used on ldc2 too but it isn't as reliable since ldc 
> considers null access to be undefined behavior anyway and thus 
> may optimize out your catch....
>
> You also need to compile in the module with ldc so build it like
>
> $ ldc2 seg.d ~/d/ldc/import/etc/linux/memoryerror.d
>
> just including the memoryerror file o the command line lets it 
> link.


how can I specify this with dub ?


If i do `dub build -b release --compiler=ldc2 
/usr/include/dmd/druntime/import/etc/linux/memoryerror.d` ; I get 
: `Package 
'/usr/include/dmd/druntime/import/etc/linux/memoryerror.d' was 
neither found locally nor online.`