[macios-devel] Signal-chaining & crash reporters

[Rolf Kvinge]

Hi,

> On 16/09/16 19:22, "Miguel de Icaza" <miguel at microsoft.com> wrote:
> 
> Hello,
> 
> Thanks for getting these proposals out Rolf.
> 
> I am not a fan of any of the provided options.
> 
> We have two issues here: Mono is doing the right thing by supporting “chained handlers”, but many of these libraries can not chain signal handlers.
> 
> Let me propose that we add a pair of methods, to undo the signal handling setup, and to restore the handling setup and surface those to managed code.
> 
> The code for things like HockeyApp would become:
> 
> 	Mono.UndoSignalHandlingSetup ();		// SIGSEGV points back to original handlers
> 	HockeyAppInstallHandlers ();			// SIGSEGV now points to HockeyApp handlers
> 	Mono.InstallSignalHandlers ();			// SIGSEGV now points to Mono handler, that have chained capabilities
> 
> The Undo/Install is necessary for the rare case of a library that can do proper chaining and might want to chain to another handler, so they would not chain back to Mono.

I think this could work.

Another advantage is that it would not require any code changes in the products, only Mono.

I can have a look at implementing (and testing) this, unless the runtime team wants to do it?

Rolf

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