> An indify tool in j.l.i tests (also in vmTestBase) convert some source-code > private static methods with MT_ MH_, and INDY_ prefixes into MethodHandle, > MethodType, and CallSite constants. > ### Purpose of Indify > > - **Transformation Tool**: `Indify` transforms existing class files to > leverage `invokedynamic` and other JSR 292 features. This transformation > allows for dynamic method calls. > > ### Key Functions > > - **Method Handle and Method Type Constants**: > - **MH_x and MT_x Methods**: These methods are used to generate > `MethodHandle` and `MethodType` constants. The tool transforms calls to these > methods into `CONSTANT_MethodHandle` and `CONSTANT_MethodType` "ldc" (load > constant) instructions. > - **Invokedynamic Call Sites**: > - **INDY_x Methods**: These methods generate `invokedynamic` call sites. > Each `INDY_x` method starts with a call to an `MH_x` method, which acts as > the bootstrap method. This is followed by an `invokeExact` call. > - **Transformation**: The tool transforms pairs of calls (to `INDY_x` > followed by `invokeExact`) into `invokedynamic` instructions. This mimics the > JVM's handling of `invokedynamic` instructions, creating dynamic call sites > that are linked at runtime. > > It currently uses ad-hoc code to process class files and intends to migrate > to ASM; but since we have the Classfile API, we can migrate to Classfile API > instead.
Oussama Louati has updated the pull request incrementally with 10 additional commits since the last revision: - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> - Update test/jdk/java/lang/invoke/indify/Indify.java Co-authored-by: ExE Boss <3889017+exe-b...@users.noreply.github.com> ------------- Changes: - all: https://git.openjdk.org/jdk/pull/18841/files - new: https://git.openjdk.org/jdk/pull/18841/files/02347415..8cedaeaf Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=18841&range=16 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18841&range=15-16 Stats: 11 lines in 1 file changed: 0 ins; 0 del; 11 mod Patch: https://git.openjdk.org/jdk/pull/18841.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18841/head:pull/18841 PR: https://git.openjdk.org/jdk/pull/18841
