Trigger the reference handling after a Truffle compilation finishes in libgraal.

Author: christianhaeubl

compiler/src/org.graalvm.compiler.truffle.compiler.hotspot.libgraal/src/org/graalvm/compiler/truffle/compiler/hotspot/libgraal/TruffleToLibGraalEntryPoints.java

@@ -274,12 +274,17 @@ public static void closeCompilation(JNIEnv env, JClass hsClazz, @CEntryPoint.Iso
             } finally {
                 compilable.release(env);
                 HSObject.cleanHandles(env);
+                doReferenceHandling();
             }
         } catch (Throwable t) {
             JNIExceptionWrapper.throwInHotSpot(env, t);
         }
     }
 
+    private static void doReferenceHandling() {
+        // Substituted in LibGraalFeature.
+    }
+
     @TruffleToLibGraal(Shutdown)
     @SuppressWarnings({"unused", "try"})
     @CEntryPoint(name = "Java_org_graalvm_compiler_truffle_runtime_hotspot_libgraal_TruffleToLibGraalCalls_shutdown")

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/heap/Heap.java

@@ -38,7 +38,6 @@
 import org.graalvm.word.Pointer;
 import org.graalvm.word.UnsignedWord;
 
-import com.oracle.svm.core.SubstrateOptions;
 import com.oracle.svm.core.annotate.Uninterruptible;
 import com.oracle.svm.core.hub.DynamicHub;
 import com.oracle.svm.core.hub.PredefinedClassesSupport;
@@ -200,10 +199,10 @@ public List<Class<?>> getLoadedClasses() {
 
     /**
      * If the automatic reference handling is disabled (see
-     * {@link SubstrateOptions.ConcealedOptions#AutomaticReferenceHandling}), then this method can
-     * be called to do the reference handling manually. On execution, the current thread will
-     * enqueue pending {@link Reference}s into their corresponding {@link ReferenceQueue}s and it
-     * will execute pending cleaners.
+     * {@link com.oracle.svm.core.SubstrateOptions.ConcealedOptions#AutomaticReferenceHandling}),
+     * then this method can be called to do the reference handling manually. On execution, the
+     * current thread will enqueue pending {@link Reference}s into their corresponding
+     * {@link ReferenceQueue}s and it will execute pending cleaners.
      *
      * This method must not be called from within a VM operation as this could result in deadlocks.
      * Furthermore, it is up to the caller to ensure that this method is only called in places where

substratevm/src/com.oracle.svm.graal.hotspot.libgraal/src/com/oracle/svm/graal/hotspot/libgraal/LibGraalFeature.java

@@ -863,3 +863,12 @@ private static void notifyCrash(String crashMessage) {
 @Delete("shouldn't appear in libgraal")
 final class Target_org_graalvm_compiler_hotspot_SymbolicSnippetEncoder {
 }
+
+@TargetClass(className = "org.graalvm.compiler.truffle.compiler.hotspot.libgraal.TruffleToLibGraalEntryPoints", onlyWith = LibGraalFeature.IsEnabled.class)
+final class Target_org_graalvm_compiler_truffle_compiler_hotspot_libgraal_TruffleToLibGraalEntryPoints {
+    @SuppressWarnings("unused")
+    @Substitute
+    private static void doReferenceHandling() {
+        Heap.getHeap().doReferenceHandling();
+    }
+}