RFR: 8283994: Make Xerces DatatypeException stackless

[Joe Wang]

On Wed, 30 Mar 2022 11:38:59 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See bug report for more details. This change improves SPECjvm2008:xml.validation for about +3%:
> 
> 
>  baseline: 298.353 ± 1.008  ops/min
>  patched:  309.912 ± 1.347  ops/min
> 
> Of course, the real improvements might be even higher, as exception might be thrown from much deeper call hierarchy.
> 
> Additional testing:
>  - [x] Linux x86_64 fastdebug, `jaxp_all`
>  - [x] Linux x86_64 fastdebug, `javax/xml`

Marked as reviewed by joehw (Reviewer).

src/java.xml/share/classes/com/sun/org/apache/xerces/internal/impl/dv/DatatypeException.java line 2:

> 1: /*
> 2:  * Copyright (c) 2017, 2022, Oracle and/or its affiliates. All rights reserved.

Update the LastModified tag below as well. Otherwise, looks good.

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PR: https://git.openjdk.java.net/jdk/pull/8036