> 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 incrementally with 10 additional commits since the last revision: - Merge remote-tracking branch 'valhalla/lworld' into 8317277 - 8387703: [lworld] address batch of comments in mainline PR Co-authored-by: Tobias Hartmann <[email protected]> Reviewed-by: thartmann, dlong - 8387661: [lworld] move generate_return_value_stub() to SharedRuntime Reviewed-by: adinn, thartmann - 8387405: [lworld] is_always_flat_in_array should be always false Reviewed-by: thartmann - 8387686: [lworld] Update the JNI specification version for value types Reviewed-by: alanb, dsimms - 8387726: [lworld] JVMTI/JDWP/JDI docs cleanup Reviewed-by: sspitsyn, cjplummer - 8387673: [lworld] C2: clone() intrinsic does not throw CloneNotSupportedException for value classes not implementing Cloneable Reviewed-by: thartmann - 8387709: [lworld] Split Valhalla tests from tier1_compiler_3 to avoid task timeouts Reviewed-by: chagedorn - 8387350: [lworld] ObjectOutputStream.writeObject() doesn't throw InvalidClassException for Serializable instance with strict init fields Reviewed-by: alanb, jpai, thartmann - 8387030: [lworld] two compiler/valhalla/inlinetypes/TestValueClasses.java sub-tests fail test3_verifier and test1_verifier Reviewed-by: thartmann ------------- Changes: - all: https://git.openjdk.org/jdk/pull/31120/files - new: https://git.openjdk.org/jdk/pull/31120/files/e51b762e..620ec3d6 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=31120&range=08 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=31120&range=07-08 Stats: 1379 lines in 54 files changed: 777 ins; 518 del; 84 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
