> This pull request implements the first [preview](https://openjdk.org/jeps/12) > of [JEP 401: Value Classes and Objects](https://openjdk.org/jeps/401): > > - [JDK-8317277](https://bugs.openjdk.org/browse/JDK-8317277): Java language > implementation of value classes and objects > - https://github.com/openjdk/jdk/pull/31121 > - [JDK-8317278](https://bugs.openjdk.org/browse/JDK-8317278): JVM > implementation of value classes and objects > - https://github.com/openjdk/jdk/pull/31122 > - [JDK-8317279](https://bugs.openjdk.org/browse/JDK-8317279): Standard > library implementation of value classes and objects > - https://github.com/openjdk/jdk/pull/31123 > > This pull request also includes the implementation of [Strict Field > Initialization in the JVM (Preview)](https://openjdk.org/jeps/8350458) (yet > to have been assigned a JEP number). That work was implemented in the same > code base because JEP 401 depends on strict field initialization. > > This is the "*master pull request*" for the initial preview of [JEP > 401](https://openjdk.org/jeps/401). Comments and review for a change this > large will not scale well in a single pull request. This pull request serves > as the vehicle for sign-off and integration into > [`jdk/master`](https://github.com/openjdk/jdk). **Review comments should be > directed to the appropriate "*sub-review pull request*" listed above.** > >> [!NOTE] >> The "*sub-review pull requests*" contain the same full set of code changes >> as this "*master pull request*" to preserve the full implementation context; >> the language compiler, JVM, and standard library changes are intertwined. >> The separate pull requests exist only to subdivide the review and related >> discussion by area. > > Any resulting code changes should be made in > [`valhalla/lworld`](https://github.com/openjdk/valhalla/). > > `valhalla/lworld` is currently updated from `jdk/master` whenever a weekly > [`jdk` tag](https://github.com/openjdk/jdk/tags) is created. At that time, > code changes from `valhalla/lworld` will be propagated to this pull request > and to all sub-review pull requests. > > Ultimately, review sign-off will be recorded on this "*master pull request*", > and the "*sub-review pull requests*" will be closed without integration. > > This pull request has a large surface area and frequently conflicts with > `jdk/master`. Refer to > [`valhalla/lworld`](https://github.com/openjdk/valhalla/) for the latest > state of the project code, keeping in mind that it may lag several days > behind `jdk/master`. Both repositories may be needed as refe...
David Simms has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 2819 commits: - Merge remote-tracking branch 'valhalla/lworld' into 8317277 - 8386690: [lworld] cherry-pick JDK-8386124 Test serviceability/sa/TestG1HeapRegion.java failed: Address of G1HeapRegion does not match Reviewed-by: liach - 8385743: [lworld] investigate and address build related comments in the Valhalla PR Reviewed-by: liach, erikj - 8376346: [lworld] Basic Shenandoah support Reviewed-by: qamai - 8386598: [lworld] C1 acmp profiling fix and minor cleanup Reviewed-by: mchevalier - 8386618: [lworld] Remove unused entry_guard_Relocation Reviewed-by: chagedorn, jsjolen, jsikstro - Merge Merge jdk-28+2 - 8386623: [lworld] Cleanup module support for system modules in JDK exploded build with preview resources Reviewed-by: liach - 8386316: [lworld] Replace Valhalla since version with 28 Reviewed-by: darcy - 8386464: [lworld] Random core libs cleanup Reviewed-by: alanb, dlsmith - ... and 2809 more: https://git.openjdk.org/jdk/compare/6def7d55...7974808b ------------- Changes: https://git.openjdk.org/jdk/pull/31120/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31120&range=04 Stats: 204842 lines in 1840 files changed: 192261 ins; 3575 del; 9006 mod Patch: https://git.openjdk.org/jdk/pull/31120.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31120/head:pull/31120 PR: https://git.openjdk.org/jdk/pull/31120
