RFR: JDK-8202319: Fix compilation warnings in Solaris debug builds for DevStudio 12.6

[Kim Barrett]

> On Apr 27, 2018, at 2:11 AM, David Holmes <david.holmes at oracle.com> wrote:
> 
> On 27/04/2018 3:32 PM, Kim Barrett wrote:
>>> On Apr 26, 2018, at 6:49 PM, gary.adams at oracle.com wrote:
>>> 
>>> Adding build-dev and hotspot-runtime-dev aliases.
>>> 
>>> -------- Forwarded Message --------
>>> Subject: 	RFR: JDK-8202319: Fix compilation warnings in Solaris debug builds for DevStudio 12.6
>>> Date: 	Thu, 26 Apr 2018 12:35:28 -0400
>>> From: 	Gary Adams <gary.adams at oracle.com>
>>> Reply-To: 	gary.adams at oracle.com
>>> To: 	OpenJDK Serviceability <serviceability-dev at openjdk.java.net>
>>> 
>>> 
>>> 
>>> Getting the sources ready for the next Solaris developer studio toolchain.
>>> Some additional warnings were found in the debug build.
>>> 
>>>   Issue:https://bugs.openjdk.java.net/browse/JDK-8202319
>>>   Webrev:http://cr.openjdk.java.net/~gadams/8202319/webrev.00/
>>> 
>>> This update conditionally disables some new error checks, if the
>>> new toolchain is used.
>> I looked at these, and the warnings are correct, so just disabling them is a bit troubling.
>> The thing is, the code in both cases is attempting to intentionally provoke a crash.
>> But because the code is invoking undefined behavior, executing it might actually do
>> anything, or nothing at all.  So while suppressing the warning might permit compilation,
>> it’s not at all obvious that the compilation will produce anything like the desired code.
>> And that’s also true for platforms that aren’t warning…
> 
> True. Perhaps we should just raise a SEGV directly?
> 
> David

I like that idea.