Native Image Committer and Community Meeting 2025-09-25

[wirthi]

List of all past and upcoming meetings: #3933

The meeting after this one is the GraalVM Community Summit in Zurich in October 2025 (there will be no online meeting in October). In November, we will have our meeting one week earlier than usual, on November 20th, in order not to collide with Thanksgiving.

New and Noteworthy

• General
  GraalVM Community Summit 22.-23. October 2025 in Zurich
  [GR-69677] Restore JDK dependency to version 25 #12210

• Native Image Layers and Analysis improvements
  [GR-58701] Define SVM API surface for base layer. #12111
  [GR-69136] Ensure fields position is stable between layers. #12085
  [GR-69089] Make CGlobalDataBasePointer layer aware #12216
  [GR-69604] Prevent constant folding of elements that should not be reflectively accessible #12190
  [GR-69102] Use AbstractImageHeapList to restrict SubstrateDiagnostics.thunks runtime type. #12132
  [GR-67494] Simplify and speed up lookup of fields in AnalysisType. #12133
  [GR-69565] Copy open type world data to the metaspace. #12134
  [GR-69548] Introduce -H:+PrintTypeStateMemoryFootprint #12143
  [GR-68726] Delay the folding of most @Stable fields until the analysis is finished #12146
  [GR-65971] Introduce onSingletonRegistration layered callback. #12124
  [GR-69273] Fix error in bad toString reporting. #12091
  [GR-69100] Automatically check for misplaced @UnknownPrimitiveField and @UnknownObjectField annotations #12066

• Crema
  [GR-60069] Field layout for Crema. #12200
  [GR-69094] Basic Reflection support for Crema. #12126

• Streamline reachability metadata
  [GR-68500] Enable --future-defaults for public gates. #11889
  [GR-65376] Print warning if provided pattern is invalid #12115

Note: please try (and test) your projects with --future-defaults=all. If need be adjust your framework with the following system properties: org.graalvm.nativeimage.future-defaults.complete-reflection-types,org.graalvm.nativeimage.future-defaults.run-time-initialize-file-system-providers, org.graalvm.nativeimage.future-defaults.run-time-initialize-security-providers.

PRs for GraalVM 21 and 17 are ready.

• Usability
  [GR-68890] Fix native Unsafe allocateInstance tracing. #12218
  [GR-36046] Remove legacy CalendarSubstitutions from Native Image #12160
  [GR-69696] Fix OptimizedLocalizationMode wrt CalendarProvider #12172
  [GR-69494] Support for build-time initialization of HijrahChronology in Native Image #12123 (external PR)
  [GR-68445] Filter out non-user class and module path entries when running -H:TrackDynamicAccess=all and make com.oracle.svm.hosted.NativeImageClassLoaderSupport#getModulePathsFinder public #12185
  [GR-69513] [GR-69514] [GR-69620] Fix proxy serialization errors at build time. #12153
  [GR-65850] [GR-68595] Fixing registration methods bypassing reachability handler creation and adding validation checks on registration methods. #12114
  [GR-65221] Issues when registering ResourceBundles with RuntimeResourceAccess #12112
  [GR-69576] Use KiB MiB GiB consistently in Native Image output #12149

• Monitoring / Tooling / Debugging
  [GR-69708] Improve crash log. #12205
  [GR-43070] Track warnings in Native Image build and list them (again) at the very end. #12162
  [GR-69654] Make JFR logging methods allocation free. #12159
  [GR-68594] Native Image object file alignment issue for glibc. #12139
  [GR-69419] Reset IgvDumpChannel.lastTargetAnnouncement. #12099
  [GR-69121] Skip emission of internal JFR ThreadPark events. #12073 (IBM/Red Hat)

• Garbage Collector / Memory Management
  Experimental in-place compacting garbage collection for the Serial GC old generation with -H:+CompactingOldGen.
  Integrate the Shenandoah/Generational-Shenandoah GC into Native Image

• Other & fixes
  [GR-68875] Fix class initialization problems. #12152
  [GR-67180] Mark compiler threads as crashed in both isolates. #12184
  [GR-43610] Separate builder and image output, show assertion status. #12108
  [GR-69533] Also replace bundle-input paths in output of bundle-builds. #12176
  [GR-69694] Fix stack walking of crashed threads. #12168
  [GR-69633] Refactor StrengthenGraph. #12165
  [GR-69306] Fix rare race conditions. #12158
  [GR-45822] Add AOT fallback compilation. #12147
  [GR-69332] Return UNCAUGHT_EXCEPTION for uncaught exceptions. #12137
  [GR-69529] Fix DebugLog. #12125
  [GR-69017] Fix pending JNI exception leak in native-image-agent. #12097
  [GR-69268] Reset GlobalAtomicLong.address. #12089
  [GR-61102] Migrate shaded ASM to Classfile API (JDK-8294982) #12069

Questions

Deep Dive: Gilles Duboscq: Project Crema

Looking into the goals and status of Project Crema: Open World for Native Image #11327