RFR: 8294972: Convert jdk.jlink internal plugins to use the Classfile API [v4]

[Mandy Chung]

On Fri, 10 Mar 2023 12:45:05 GMT, Adam Sotona <asotona at openjdk.org> wrote:

>> jdk.jlink internal plugins are heavily using ASM
>> 
>> This patch converts ASM calls to Classfile API.
>> 
>> Please review.
>> Thanks,
>> Adam
>
> Adam Sotona has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 208 commits:
> 
>  - Merge branch 'master' into JDK-8294972-jlink-plugins
>    
>    # Conflicts:
>    #	src/java.base/share/classes/module-info.java
>  - Merge branch 'master' into JDK-8294972-jlink-plugins
>  - fixed SystemModulesPlugin formatting
>  - 8303624: The java.lang.Thread.FieldHolder can be null for JNI attaching threads
>    
>    Reviewed-by: alanb, dcubed
>  - 8302360: Atomic*.compareAndExchange Javadoc unclear
>    
>    Reviewed-by: martin, dholmes
>  - 8302779: HelidonAppTest.java fails with "assert(_cb == CodeCache::find_blob(pc())) failed: Must be the same" or SIGSEGV
>    
>    Reviewed-by: coleenp, sspitsyn
>  - 8303691: Fedora based devkit build should load more packages from archive location
>    
>    Reviewed-by: mbaesken, erikj
>  - 8303924: ProblemList serviceability/sa/UniqueVtableTest.java on Linux
>    
>    Reviewed-by: dcubed
>  - 8303609: ProblemList serviceability/sa/TestSysProps.java with ZGC
>    
>    Reviewed-by: dcubed
>  - 8289765: JDI EventSet/resume/resume008 failed with "ERROR: suspendCounts don't match for : VirtualThread-unparker"
>    
>    Reviewed-by: sspitsyn, kevinw
>  - ... and 198 more: https://git.openjdk.org/jdk/compare/b1d89f30...cfc612ec

src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/StripJavaDebugAttributesPlugin.java line 62:

> 60:                         // XXX. Do we have debug info? Is Asm ready for module-info?
> 61:                     } else {
> 62:                         byte[] content = newClassReader(path, resource, Classfile.Option.processDebug(false))

ASM `ClassReader.SKIP_DEBUG` flag indicates to skip  the SourceFile, SourceDebugExtension, LocalVariableTable, LocalVariableTypeTable, LineNumberTable and MethodParameters attributes.

`Classfile.Option.processDebug(false)` only skips LocalVariableTable, LocalVariableTypeTable, CHARACTER_RANGE_TABLE attributes.   To implement the same behavior as `SKIP_DEBUG`, it needs `Classfile.Option.processLineNumbers(false)` and skipping other attributes.

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PR: https://git.openjdk.org/jdk/pull/12944