> 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 2894 commits: - Merge remote-tracking branch 'valhalla/lworld' into 8317277 - Merge Merge jdk-28+5 - 8386602: [lworld] C2: assert(n != top() || r->in(pnum) == top()) failed: live value must not be garbage Reviewed-by: thartmann - 8386499: [lworld] java/util/Arrays/ArraysEqCmpTest.java fails with unexpected layoutKind 5 Reviewed-by: chagedorn - 8387629: [lworld] Don't use apiNote for some recent JDI spec updates Reviewed-by: sspitsyn - 8387682: [lworld] Mention preview API in description of can_support_value_objects capability Reviewed-by: cjplummer - 8387657: [lworld] Object Tags section of JVMTI spec should make it clear that ObjectFree event is not sent for value objects Reviewed-by: sspitsyn, cjplummer - 8382226: [lworld] C2: Fix _copyOf/_copyOfRange intrinsic for flat abstract value class arrays Reviewed-by: qamai, thartmann - 8387612: [lworld] C2: assert(array_type->is_flat() || ideal.ctrl()->in(0)->as_If()->is_flat_array_check(&_gvn)) failed: Should be found Co-authored-by: Marc Chevalier <[email protected]> Reviewed-by: thartmann - 8387458: [lworld] vmTestbase/nsk/jdi/Accessible/modifiers/modifiers001 failed after JDK-8387389 Reviewed-by: dholmes, alanb - ... and 2884 more: https://git.openjdk.org/jdk/compare/db987b1e...e51b762e ------------- Changes: https://git.openjdk.org/jdk/pull/31120/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31120&range=07 Stats: 210722 lines in 1883 files changed: 197550 ins; 3748 del; 9424 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
