Integrated: 8357619: [JVMCI] Revisit phantom_ref parameter in JVMCINMethodData::get_nmethod_mirror

Doug Simon dnsimon at openjdk.org
Tue Jun 3 06:22:57 UTC 2025


On Wed, 28 May 2025 10:28:38 GMT, Doug Simon <dnsimon at openjdk.org> wrote:

> The point of the `phantom_ref` parameter (introduced by [JDK-8234359](https://bugs.openjdk.org/browse/JDK-8234359)) of `JVMCINMethodData::get_nmethod_mirror` is to avoid the special resurrection semantics of a phantom read when reading the field during GC, which is when `JVMCINMethodData::invalidate_nmethod_mirror` can be called.
> This case can be handled directly in `JVMCINMethodData::invalidate_nmethod_mirror` and so the `phantom_ref` parameter can be removed.

This pull request has now been integrated.

Changeset: 6cfd4057
Author:    Doug Simon <dnsimon at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/6cfd4057dce9262f54e71a3930e16da84aa0d9f1
Stats:     12 lines in 3 files changed: 0 ins; 4 del; 8 mod

8357619: [JVMCI] Revisit phantom_ref parameter in JVMCINMethodData::get_nmethod_mirror

Reviewed-by: eosterlund, never

-------------

PR: https://git.openjdk.org/jdk/pull/25488


More information about the hotspot-compiler-dev mailing list