[GR-60088] Add org.graalvm.nativeimage.libgraal module. #10380
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substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/RuntimeSupport.java
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* renamed LibGraalLoader.getModuleMap to getClassModuleMap * replaced LibGraalLoader.getJavaHome with a protocol shared between HostedLibGraalClassLoader and LibGraalFeature * removed LibGraalLoader.getRuntimeClassLoader * remove LibGraalLoader.getServiceModules
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This PR adds the
org.graalvm.nativeimage.libgraalmodule. This provides a stable API for use by libgraal that is an extension to the standard Native Image API (i.e., theorg.graalvm.nativeimage**packages here). Using this extended API,LibGraalFeature.javahas been moved intocompiler/, out ofsubstratevm/. It no longer depends on Native Image internals, allowing any GraalVM binary that supportsorg.graalvm.nativeimage.libgraalto be used as a tool for building libgraal. This is a step towards Project Galahad.Over time, some or all of
jdk.graal.nativeimagemay be moved intoorg.graalvm.nativeimage. This is a discussion to be had in follow-up PRs.The API changes can most easily been seen in:
sdk/src/org.graalvm.nativeimage/snapshot.sigtestsdk/src/org.graalvm.nativeimage.libgraal/snapshot.sigtestA large part of the code changes comes from the fact that
LibGraalFeatureitself is now loaded by the LibGraalClassLoader which is separate from the Native Image class loader. This means the use of method handles to communicate between the "hosted" parts of libgraal (those loaded by the Native Image class loader) and the "guest" parts of libgraal has been removed. This is a large code reduction and makes the logic much easier to follow. It also means no more need for@NativeImageReinitializeas the Graal classes loaded for compiling into libgraal are different from those loaded to do the compilation and thus no longer need re-initializing.Other changes of note:
-Djdk.graal.ShowConfiguration=infohas changed (and improved) slightly to also show the SVM GC algorithm used in libgraal.Before:
Using "Graal Enterprise compiler with Truffle extensions" loaded from a PGO optimized Native Image shared libraryAfter:
Using "Graal Enterprise compiler with Truffle extensions" loaded from a Native Image shared library (PGO optimized, gc=Serial GC)