RFR: 8357179: Deprecate VFORK launch mechanism from Process implementation (linux)

[Alan Bateman]

On Sat, 17 May 2025 06:49:37 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> For the ratio behind this please see the companion CSR: https://bugs.openjdk.org/browse/JDK-8357180.
> 
> We plan to deprecate this in JDK 25 and to remove it in JDK 26.
> 
> This patch just writes a deprecation message to stderr:
> 
> 
> 08:46:38 thomas at starfish java -Djdk.lang.Process.launchMechanism=VFORK SimpleSpawn ls
> VFORK MODE DEPRECATED
> The VFORK launch mechanism has been deprecated for being dangerous.
> It will be removed in a future java version. Either remove the
> jdk.lang.Process.launchMechanism property (preferred) or use FORK mode
> instead (-Djdk.lang.Process.launchMechanism=FORK).
> ...

src/java.base/unix/classes/java/lang/ProcessImpl.java line 111:

> 109:                                            "It will be removed in a future java version. Either remove the\n" +
> 110:                                            "jdk.lang.Process.launchMechanism property (preferred) or use FORK mode\n" +
> 111:                                            "instead (-Djdk.lang.Process.launchMechanism=FORK).");

This is okay although I could imagine someone wanting to replace this with a text block.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/25282#discussion_r2096052329