RFR 8163553 java.lang.LinkageError from test java/lang/ThreadGroup/Stop.java

[Paul Sandoz]

Gentle reminder.

Paul.

> On 18 Oct 2016, at 11:41, Paul Sandoz <Paul.Sandoz at oracle.com> wrote:
> 
> Hi,
> 
> Please review:
> 
>  http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8163553-vh-mh-link-errors-not-wrapped/webrev/
> 
> This is the issue that motivated a change in the behaviour of indy wrapping Errors in BootstrapMethodError, JDK-8166974. I plan to push this issue with JDK-8166974 to hs, since they are related in behaviour even though there is no direct dependency between the patches.
> 
> 
> When invoking signature-polymorphic methods a similar but hardcoded dance occurs, with an appeal to Java code, to link the call site.
> 
> - MethodHandle.invoke/invokeExact (and the VH methods) would wrap all Errors in LinkageError. Now they are passed through, thus an Error like ThreadDeath is not wrapped.
> 
> - MethodHandle.invoke/invokeExact/invokeBasic throw Throwable, and in certain cases the Throwable is wrapped in an InternalError. In many other cases Error and RuntimeException are propagated, which i think in general is the right pattern, so i consistently applied that.
> 
> - I updated StringConcatFactory to also pass through Errors and avoid unduly wrapping StringConcatException in another instance of StringConcatException. (LambdaMetafactory and associated classes required no changes.)
> 
> Thanks,
> Paul.