[jdk8u-dev] RFR: 8287132: Retire Runtime.runFinalizersOnExit so that it always throws UOE

[Thorsten Glaser]

On Fri, 29 Jul 2022, David Holmes wrote:

>   Patch: https://git.openjdk.org/jdk8u-dev/pull/92.diff

From a distro maintainer PoV I do have a complaint about this.

Currently, JVM_Exit is an exported symbol of the shlib:

$ nm -D /usr/lib/jvm/java-1.8.0-openjdk-i386/jre/lib/i386/server/libjvm.so | fgrep Exit 
005cc5c0 T JVM_Exit
[…]

This patch will remove that, IIUC. This is an ABI break.

ABI breaks need the shlib major version to increase.
This shlib is unversioned, so this cannot be done.

Therefore this cannot be done in OpenJDK 8 at all, or in any
released version really.

To make this possible, add a dummy JVM_Exit() call, instead of
removing it altogether. Perhaps like this?

JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
  before_exit(thread);
  vm_exit(code);
JVM_END

I understand this is the same as JVM_Halt(), but this duplication
is necessary, mandatory even to avoid breaking existing applications.

bye,
//mirabilos
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