[GR-64192] Native Image Builder Memory Footprint Optimizations

sdk/src/org.graalvm.collections.test/src/org/graalvm/collections/test/EmptyEconomicSetTest.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * The Universal Permissive License (UPL), Version 1.0
+ *
+ * Subject to the condition set forth below, permission is hereby granted to any
+ * person obtaining a copy of this software, associated documentation and/or
+ * data (collectively the "Software"), free of charge and under any and all
+ * copyright rights in the Software, and any and all patent rights owned or
+ * freely licensable by each licensor hereunder covering either (i) the
+ * unmodified Software as contributed to or provided by such licensor, or (ii)
+ * the Larger Works (as defined below), to deal in both
+ *
+ * (a) the Software, and
+ *
+ * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+ * one is included with the Software each a "Larger Work" to which the Software
+ * is contributed by such licensors),
+ *
+ * without restriction, including without limitation the rights to copy, create
+ * derivative works of, display, perform, and distribute the Software and make,
+ * use, sell, offer for sale, import, export, have made, and have sold the
+ * Software and the Larger Work(s), and to sublicense the foregoing rights on
+ * either these or other terms.
+ *
+ * This license is subject to the following condition:
+ *
+ * The above copyright notice and either this complete permission notice or at a
+ * minimum a reference to the UPL must be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.graalvm.collections.test;
+
+import java.util.NoSuchElementException;
+
+import org.graalvm.collections.EconomicSet;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class EmptyEconomicSetTest {
+
+    @Test
+    public void testIsEmpty() {
+        Assert.assertTrue(EconomicSet.emptySet().isEmpty());
+    }
+
+    @Test
+    public void testSizeZero() {
+        Assert.assertEquals(0, EconomicSet.emptySet().size());
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testAdd() {
+        EconomicSet.emptySet().add(1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testRemove() {
+        EconomicSet.emptySet().remove(1);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testClear() {
+        EconomicSet.emptySet().clear();
+    }
+
+    @Test
+    public void testContains() {
+        Assert.assertFalse(EconomicSet.emptySet().contains(1));
+    }
+
+    @Test
+    public void testIteratorAlwaysEmpty() {
+        Assert.assertFalse(EconomicSet.emptySet().iterator().hasNext());
+    }
+
+    @Test(expected = NoSuchElementException.class)
+    public void testIteratorThrowsException() {
+        EconomicSet.emptySet().iterator().next();
+    }
+}

sdk/src/org.graalvm.collections/snapshot.sigtest

@@ -136,6 +136,7 @@ meth public static <%0 extends java.lang.Object> org.graalvm.collections.Economi
 meth public static <%0 extends java.lang.Object> org.graalvm.collections.EconomicSet<{%%0}> create(org.graalvm.collections.Equivalence,int)
 meth public static <%0 extends java.lang.Object> org.graalvm.collections.EconomicSet<{%%0}> create(org.graalvm.collections.Equivalence,org.graalvm.collections.UnmodifiableEconomicSet<{%%0}>)
 meth public static <%0 extends java.lang.Object> org.graalvm.collections.EconomicSet<{%%0}> create(org.graalvm.collections.UnmodifiableEconomicSet<{%%0}>)
+meth public static org.graalvm.collections.EconomicSet emptySet()
 meth public void addAll(java.lang.Iterable<{org.graalvm.collections.EconomicSet%0}>)
 meth public void addAll(java.util.Iterator<{org.graalvm.collections.EconomicSet%0}>)
 meth public void addAll(org.graalvm.collections.EconomicSet<{org.graalvm.collections.EconomicSet%0}>)

sdk/src/org.graalvm.collections/src/org/graalvm/collections/EconomicSet.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -206,4 +206,14 @@ static <E> EconomicSet<E> create(Equivalence strategy, int initialCapacity) {
     static <E> EconomicSet<E> create(Equivalence strategy, UnmodifiableEconomicSet<E> c) {
         return EconomicMapImpl.create(strategy, c, true);
     }
+
+    /**
+     * Return an empty, unmodifiable {@link EconomicSet}.
+     *
+     * @since 25.0
+     */
+    @SuppressWarnings("unchecked")
+    static <E> EconomicSet<E> emptySet() {
+        return (EconomicSet<E>) EmptySet.EMPTY_SET;
+    }
 }

sdk/src/org.graalvm.collections/src/org/graalvm/collections/EmptySet.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * The Universal Permissive License (UPL), Version 1.0
+ *
+ * Subject to the condition set forth below, permission is hereby granted to any
+ * person obtaining a copy of this software, associated documentation and/or
+ * data (collectively the "Software"), free of charge and under any and all
+ * copyright rights in the Software, and any and all patent rights owned or
+ * freely licensable by each licensor hereunder covering either (i) the
+ * unmodified Software as contributed to or provided by such licensor, or (ii)
+ * the Larger Works (as defined below), to deal in both
+ *
+ * (a) the Software, and
+ *
+ * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
+ * one is included with the Software each a "Larger Work" to which the Software
+ * is contributed by such licensors),
+ *
+ * without restriction, including without limitation the rights to copy, create
+ * derivative works of, display, perform, and distribute the Software and make,
+ * use, sell, offer for sale, import, export, have made, and have sold the
+ * Software and the Larger Work(s), and to sublicense the foregoing rights on
+ * either these or other terms.
+ *
+ * This license is subject to the following condition:
+ *
+ * The above copyright notice and either this complete permission notice or at a
+ * minimum a reference to the UPL must be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.graalvm.collections;
+
+import java.util.Iterator;
+
+/**
+ * Singleton instance for empty set. Reuses empty iterator from {@link EmptyMap}.
+ */
+class EmptySet {
+    static final EconomicSet<Object> EMPTY_SET = new EconomicSet<>() {
+        @Override
+        public boolean add(Object element) {
+            throw new IllegalArgumentException("Cannot modify the always-empty set");
+        }
+
+        @Override
+        public void remove(Object element) {
+            throw new IllegalArgumentException("Cannot modify the always-empty set");
+        }
+
+        @Override
+        public void clear() {
+            throw new IllegalArgumentException("Cannot modify the always-empty set");
+        }
+
+        @Override
+        public boolean contains(Object element) {
+            return false;
+        }
+
+        @Override
+        public int size() {
+            return 0;
+        }
+
+        @Override
+        public boolean isEmpty() {
+            return true;
+        }
+
+        @Override
+        public Iterator<Object> iterator() {
+            return EmptyMap.EMPTY_ITERATOR;
+        }
+    };
+}

substratevm/src/com.oracle.graal.pointsto/src/com/oracle/graal/pointsto/PointsToAnalysis.java

@@ -45,6 +45,7 @@
 import com.oracle.graal.pointsto.api.HostVM;
 import com.oracle.graal.pointsto.api.PointstoOptions;
 import com.oracle.graal.pointsto.constraints.UnsupportedFeatures;
+import com.oracle.graal.pointsto.flow.AlwaysEnabledPredicateFlow;
 import com.oracle.graal.pointsto.flow.AnyPrimitiveSourceTypeFlow;
 import com.oracle.graal.pointsto.flow.FieldTypeFlow;
 import com.oracle.graal.pointsto.flow.FormalParamTypeFlow;
@@ -103,9 +104,9 @@ public abstract class PointsToAnalysis extends AbstractAnalysisEngine {
      */
     private final boolean trackPrimitiveValues;
     private final AnalysisType longType;
-    private final AnalysisType voidType;
     private final boolean usePredicates;
     private AnyPrimitiveSourceTypeFlow anyPrimitiveSourceTypeFlow;
+    private AlwaysEnabledPredicateFlow alwaysEnabledPredicateFlow;
 
     protected final boolean trackTypeFlowInputs;
     protected final boolean reportAnalysisStatistics;
@@ -127,12 +128,13 @@ public PointsToAnalysis(OptionValues options, AnalysisUniverse universe, HostVM
 
         this.objectType = metaAccess.lookupJavaType(Object.class);
         this.longType = metaAccess.lookupJavaType(long.class);
-        this.voidType = metaAccess.lookupJavaType(void.class);
 
         this.trackPrimitiveValues = PointstoOptions.TrackPrimitiveValues.getValue(options);
         this.usePredicates = PointstoOptions.UsePredicates.getValue(options);
         this.anyPrimitiveSourceTypeFlow = new AnyPrimitiveSourceTypeFlow(null, longType);
         this.anyPrimitiveSourceTypeFlow.enableFlow(null);
+        this.alwaysEnabledPredicateFlow = new AlwaysEnabledPredicateFlow();
+
         /*
          * Make sure the all-instantiated type flow is created early. We do not have any
          * instantiated types yet, so the state is empty at first.
@@ -292,6 +294,7 @@ public boolean trackConcreteAnalysisObjects(@SuppressWarnings("unused") Analysis
     public void cleanupAfterAnalysis() {
         super.cleanupAfterAnalysis();
         anyPrimitiveSourceTypeFlow = null;
+        alwaysEnabledPredicateFlow = null;
         unsafeLoads = null;
         unsafeStores = null;
 
@@ -310,10 +313,6 @@ public AnalysisType getLongType() {
         return longType;
     }
 
-    public AnalysisType getVoidType() {
-        return voidType;
-    }
-
     public AnalysisType getObjectArrayType() {
         return metaAccess.lookupJavaType(Object[].class);
     }
@@ -331,6 +330,10 @@ public AnyPrimitiveSourceTypeFlow getAnyPrimitiveSourceTypeFlow() {
         return anyPrimitiveSourceTypeFlow;
     }
 
+    public AlwaysEnabledPredicateFlow getAlwaysEnabledPredicateFlow() {
+        return alwaysEnabledPredicateFlow;
+    }
+
     @Override
     public Iterable<AnalysisType> getAllSynchronizedTypes() {
         return getAllInstantiatedTypes();

substratevm/src/com.oracle.graal.pointsto/src/com/oracle/graal/pointsto/flow/MethodTypeFlowBuilder.java

@@ -208,7 +208,7 @@ public MethodTypeFlowBuilder(PointsToAnalysis bb, PointsToAnalysisMethod method,
         this.graphKind = graphKind;
         if (bb.trackPrimitiveValues()) {
             this.alwaysEnabled = bb.usePredicates()
-                            ? TypeFlowBuilder.create(bb, method, null, PointsToAnalysis.syntheticSourcePosition(method), AlwaysEnabledPredicateFlow.class, AlwaysEnabledPredicateFlow::new)
+                            ? TypeFlowBuilder.create(bb, method, null, PointsToAnalysis.syntheticSourcePosition(method), AlwaysEnabledPredicateFlow.class, bb::getAlwaysEnabledPredicateFlow)
                             : null;
             this.anyPrimitiveSourceTypeFlowBuilder = TypeFlowBuilder.create(bb, method, alwaysEnabled, null, AnyPrimitiveSourceTypeFlow.class, bb::getAnyPrimitiveSourceTypeFlow);
         } else {

substratevm/src/com.oracle.graal.pointsto/src/com/oracle/graal/pointsto/flow/TypeFlow.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -296,14 +296,14 @@ public void addPredicated(PointsToAnalysis bb, TypeFlow<?> predicatedFlow) {
         }
     }
 
-    private void removePredicated(TypeFlow<?> predicatedFlow) {
-        ConcurrentLightHashSet.removeElement(this, PREDICATED_FLOWS_UPDATER, predicatedFlow);
-    }
-
     public Collection<TypeFlow<?>> getPredicatedFlows() {
         return ConcurrentLightHashSet.getElements(this, PREDICATED_FLOWS_UPDATER);
     }
 
+    public void clearPredicatedFlows() {
+        ConcurrentLightHashSet.clear(this, PREDICATED_FLOWS_UPDATER);
+    }
+
     public boolean predicateAlreadyTriggered() {
         return AtomicUtils.isSet(this, PREDICATE_TRIGGERED_UPDATER);
     }
@@ -945,31 +945,34 @@ protected void onSaturated() {
     private void notifySaturated(PointsToAnalysis bb) {
         for (TypeFlow<?> use : getUses()) {
             notifyUseOfSaturation(bb, use);
-            removeUse(use);
         }
+        clearUses();
         for (TypeFlow<?> observer : getObservers()) {
             notifyObserverOfSaturation(bb, observer);
-            removeObserver(observer);
         }
+        clearObservers();
     }
 
     /** This flow will swap itself out at all uses and observers. */
     protected void swapOut(PointsToAnalysis bb, TypeFlow<?> newFlow) {
         assert isSaturated() : "This operation should only be called on saturated flows:" + this;
         for (TypeFlow<?> use : getUses()) {
-            swapAtUse(bb, newFlow, use);
+            newFlow.addUse(bb, use);
         }
+        clearUses();
         for (TypeFlow<?> observer : getObservers()) {
-            swapAtObserver(bb, newFlow, observer);
+            observer.replacedObservedWith(bb, newFlow);
         }
+        clearObservers();
         /*
          * Before performing the swap, make sure addPredicated will immediately enable any newly
          * added predicated flows.
          */
         AtomicUtils.atomicMark(this, PREDICATE_TRIGGERED_UPDATER);
         for (TypeFlow<?> predicatedFlow : getPredicatedFlows()) {
-            swapAtPredicated(bb, newFlow, predicatedFlow);
+            newFlow.addPredicated(bb, predicatedFlow);
         }
+        clearPredicatedFlows();
     }
 
     protected void swapAtUse(PointsToAnalysis bb, TypeFlow<?> newFlow, TypeFlow<?> use) {
@@ -983,11 +986,6 @@ protected void swapAtObserver(PointsToAnalysis bb, TypeFlow<?> newFlow, TypeFlow
         observer.replacedObservedWith(bb, newFlow);
     }
 
-    private void swapAtPredicated(PointsToAnalysis bb, TypeFlow<?> newFlow, TypeFlow<?> predicatedFlow) {
-        removePredicated(predicatedFlow);
-        newFlow.addPredicated(bb, predicatedFlow);
-    }
-
     /**
      * Notifies this flow that its input has saturated, but only runs the
      * {@link TypeFlow#onInputSaturated}} if this flow is enabled. Otherwise, the execution of