> This PR adds a new annotation, `@AOTInitialize` that forces a class to be (a) > initialized in the AOT assembly phase, and (b) stored in the AOT cache in an > already initialized state. This means that all the static fields in this > class will be immediately available upon JVM bootstrap when the AOT cache is > used in an application's production run. > > This PR annotates a single class, `jdk.internal.math.MathUtils` (also the > object hierarchy root class, `Object.class`, which has no associated AOT > initialization but is required for completeness). More classes will be added > in future PRs. > > If a class `K` has the `@AOTInitialize` annotation, the same annotation must > be also added to > - All of `K`'s super classes > - All of `K`'s super interfaces that require to be initialized when `K` is > initialized (see JVMS 5.5. Initialization, step 7; also C++ function > `InstanceKlass::interface_needs_clinit_execution_as_super()` > > Note, the check of the above requirement has been moved to > `AOTClassInitializer::check_aot_annotations()`. The previous check in > `ClassFileParser` was not executed because the class is loaded in the AOT > training run, where `CDSConfig::is_initing_classes_at_dump_time()` returns > `false` (this function returns `true` only in the AOT assembly phase). > > This annotation is awfully similar to `@AOTSafeClassInitializer`, and I am > not sure if we need both. Please see the javadoc in `@AOTInitialize` to see > the difference between the two annotations.
Ioi Lam has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 23 commits: - Updated requirements for annotations on supertypes for AOTInitialize and AOTSafeClassInitializer - Merge branch 'master' into aot-initialize-math-utils - Added logging about @AOTSafeClassInitializer classes that have not been initialized - Added comment about the order of FinalImageRecipes::apply_recipes() vs link_all_loaded_classes() - Exclude more GC heap size tests as AOT cache size has increased for "make test JTREG=AOT_JDK=onestep ..." - Added javadoc; added test case; code clean up - Merge branch 'master' into aot-initialize-math-utils - cleanup - Merge branch 'master' into aot-initialize-math-utils - Merge branch '8366477-refactor-aot-related-flag-bits-in-klass-hpp' into aot-initialize-math-utils - ... and 13 more: https://git.openjdk.org/jdk/compare/7ec3fa5f...d21bfb12 ------------- Changes: https://git.openjdk.org/jdk/pull/27024/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27024&range=04 Stats: 350 lines in 12 files changed: 288 ins; 54 del; 8 mod Patch: https://git.openjdk.org/jdk/pull/27024.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27024/head:pull/27024 PR: https://git.openjdk.org/jdk/pull/27024
