[Mono-dev] signal issue? crash when debugger attached and web request fails

[Zoltan Varga]

Hi,

  Where is the crash location ? The runtime implements null reference
exception checking by catching the SIGSEGV signal, so if a nullref happens
in managed code while running under lldb, it will look like a crash.
Running with
MONO_DEBUG=explicit-null-checks
turns this behavior off.

            Zoltan

On Mon, Feb 20, 2017 at 11:00 AM, Jonathan Mitchell <lists at mugginsoft.com>
wrote:

> I embed Mono in my Obj-C app and develop in X-code on Mac OS
>
> If a managed web request is made and fails (due to a lack of network
> access) while LLDB is attached the Mono runtime crashes.
> Without the debugger attached things seem to be okay.
> So I presume that LLDB is intercepting a signal generated by the runtime
> when the underlying socket(?) request times out.
>
> Is that so?
> And where in the Mono source should I be looking to get a better
> understanding of what is happening here?
>
> Thanks
>
> Jonathan.
>
>
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