On Thu, 15 May 2025 03:23:40 GMT, Ioi Lam <ik...@openjdk.org> wrote:

>> This is the implementation of the draft [JEP: Ahead-of-time Command Line 
>> Ergonomics](https://bugs.openjdk.org/browse/JDK-8350022)
>> 
>> - Implemented new flag `AOTCacheOutput`, which can be used to create an AOT 
>> cache using the "one-command workflow"
>> - Added processing of the `JAVA_AOT_OPTIONS` environment variable that can 
>> supply extra VM options when creating an AOT cache
>> - Added `%p` substitution for `AOTCache`, `AOTCacheOutput`, and 
>> `AOTConfiguration` options
>> 
>> Please see the [JEP](https://bugs.openjdk.org/browse/JDK-8350022) and 
>> [CSR](https://bugs.openjdk.org/browse/JDK-8356010) for detailed 
>> specification.
>> 
>> Examples:
>> 
>> 
>> # Create an AOT cache with a single command:
>> $ java -cp HelloWorld.jar -XX:AOTMode=record -XX:AOTCacheOutput=foo.aot 
>> HelloWorld
>> Hello World
>> Temporary AOTConfiguration recorded: foo.aot.config
>> Launching child process /usr/bin/java to assemble AOT cache foo.aot using 
>> configuration foo.aot.config
>> Picked up JAVA_TOOL_OPTIONS: -Djava.class.path=HelloWorld.jar 
>> -XX:AOTCacheOutput=foo.aot -XX:AOTConfiguration=foo.aot.config 
>> -XX:AOTMode=create
>> Reading AOTConfiguration foo.aot.config and writing AOTCache foo.aot
>> AOTCache creation is complete: foo.aot 10240000 bytes
>> 
>> # Create logging file for the AOT cache assembly phase
>> $ export AOT_TOOL_COMMAND=-Xlog:cds:file=log.txt
>> $ java -cp HelloWorld.jar -XX:AOTMode=record -XX:AOTCacheOutput=foo.aot 
>> HelloWorld
>> 
>> 
>> Note: the child process is launched with Java API because the HotSpot native 
>> APIs are not sufficient (no way to set env vars for child process).
>
> Ioi Lam has updated the pull request with a new target base due to a merge or 
> a rebase. The pull request now contains 22 commits:
> 
>  - @vnkozlov comments
>  - added info about JTREG/AOT_JDK testing
>  - fixed whitespace
>  - Merge branch 'master' into 8355798-implement-leyden-ergo-jep-8350022
>  - java.md updates from @rose00
>  - Resolved differences with CSR JDK-8356010
>  - Added param to makefile function SetupAOT for choosing onestep vs twostep
>  - Allow one-step training even when -XX:AOTMode=auto is specified
>  - Merge branch 'master' into 8355798-implement-leyden-ergo-jep-8350022
>  - Update java man page
>  - ... and 12 more: https://git.openjdk.org/jdk/compare/5e50a584...7f4c0e8b

Looks good.

-------------

Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24942#pullrequestreview-2842120535

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