RFR: 8349009: JVM fails to start when AOTClassLinking is used with unverifiable old classes

[Vladimir Kozlov]

On Thu, 30 Jan 2025 02:40:10 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> During the testing of [JDK-8348752](https://bugs.openjdk.org/browse/JDK-8348752), we notice test failures caused by unverifiable old classes (i.e., classes with bad instructions and major version < 50).
> 
> The fix is simple. Simply exclude unlinked classes from the AOTCache when `-XX:+AOTClassLinking` is enabled.
> 
> Verified with JCK.

test/hotspot/jtreg/runtime/cds/appcds/aotClassLinking/BadOldClassA.jasm line 4:

> 2:  * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
> 3:  * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
> 4:  */

Header in 2 new tests should be open one, I think.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23361#discussion_r1934952133