[GR-60044] Use runtime ClassLoader for unique name support.

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/SubstrateUtil.java

@@ -51,6 +51,7 @@
 import com.oracle.svm.core.annotate.RecomputeFieldValue;
 import com.oracle.svm.core.annotate.RecomputeFieldValue.Kind;
 import com.oracle.svm.core.annotate.TargetClass;
+import com.oracle.svm.core.util.HostedSubstrateUtil;
 import com.oracle.svm.core.util.VMError;
 import com.oracle.svm.util.ReflectionUtil;
 import com.oracle.svm.util.StringUtil;
@@ -376,12 +377,14 @@ public static String defaultUniqueShortName(Member m) {
      * @return A unique identifier for the classloader or the empty string when the loader is one of
      *         the special set whose method names do not need qualification.
      */
-    public static String classLoaderNameAndId(ClassLoader loader) {
-        if (loader == null) {
+    public static String runtimeClassLoaderNameAndId(ClassLoader loader) {
+        ClassLoader runtimeClassLoader = SubstrateUtil.HOSTED ? HostedSubstrateUtil.getRuntimeClassLoader(loader) : loader;
+
+        if (runtimeClassLoader == null) {
             return "";
         }
         try {
-            return (String) classLoaderNameAndId.get(loader);
+            return (String) classLoaderNameAndId.get(runtimeClassLoader);
         } catch (IllegalAccessException e) {
             throw VMError.shouldNotReachHere("Cannot reflectively access ClassLoader.nameAndId");
         }

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/UniqueShortNameProviderDefaultImpl.java

@@ -42,7 +42,7 @@
 public class UniqueShortNameProviderDefaultImpl implements UniqueShortNameProvider {
     @Override
     public String uniqueShortName(ClassLoader loader, ResolvedJavaType declaringClass, String methodName, Signature methodSignature, boolean isConstructor) {
-        return SubstrateUtil.defaultUniqueShortName(SubstrateUtil.classLoaderNameAndId(loader), declaringClass, methodName, methodSignature, isConstructor);
+        return SubstrateUtil.defaultUniqueShortName(SubstrateUtil.runtimeClassLoaderNameAndId(loader), declaringClass, methodName, methodSignature, isConstructor);
     }
 
     @Override
@@ -52,7 +52,7 @@ public String uniqueShortName(Member m) {
 
     @Override
     public String uniqueShortLoaderName(ClassLoader classLoader) {
-        return SubstrateUtil.classLoaderNameAndId(classLoader);
+        return SubstrateUtil.runtimeClassLoaderNameAndId(classLoader);
     }
 
     public static class UseDefault implements BooleanSupplier {

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/util/HostedSubstrateUtil.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2024, 2024, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.svm.core.util;
+
+import org.graalvm.nativeimage.ImageSingletons;
+import org.graalvm.nativeimage.Platform;
+import org.graalvm.nativeimage.Platforms;
+
+@Platforms(Platform.HOSTED_ONLY.class)
+public interface HostedSubstrateUtil {
+
+    static ClassLoader getRuntimeClassLoader(ClassLoader loader) {
+        return ImageSingletons.lookup(HostedSubstrateUtil.class).doGetRuntimeClassLoader(loader);
+    }
+
+    ClassLoader doGetRuntimeClassLoader(ClassLoader loader);
+}

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/image/NativeImageBFDNameProvider.java

@@ -87,7 +87,7 @@ public String uniqueShortLoaderName(ClassLoader loader) {
         if (isGraalImageLoader(loader)) {
             return "";
         }
-        String name = SubstrateUtil.classLoaderNameAndId(loader);
+        String name = SubstrateUtil.runtimeClassLoaderNameAndId(loader);
         // name will look like "org.foo.bar.FooBarClassLoader @1234"
         // trim it down to something more manageable
         // escaping quotes in the classlaoder name does not work in GDB

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/meta/HostedMethod.java

@@ -34,7 +34,6 @@
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
-import java.util.function.Function;
 
 import com.oracle.graal.pointsto.constraints.UnsupportedFeatureException;
 import com.oracle.graal.pointsto.infrastructure.OriginalMethodProvider;
@@ -150,20 +149,30 @@ static HostedMethod create(HostedUniverse universe, AnalysisMethod wrapped, Host
 
     private static HostedMethod create0(AnalysisMethod wrapped, HostedType holder, ResolvedSignature<HostedType> signature,
                     ConstantPool constantPool, ExceptionHandler[] handlers, MultiMethodKey key, Map<MultiMethodKey, MultiMethod> multiMethodMap, LocalVariableTable localVariableTable) {
-        Function<Integer, HostedMethodNameFactory.MethodNameInfo> nameGenerator = (collisionCount) -> {
-            String name = wrapped.wrapped.getName(); // want name w/o any multimethodkey suffix
-            if (key != ORIGINAL_METHOD) {
-                name += StableMethodNameFormatter.MULTI_METHOD_KEY_SEPARATOR + key;
-            }
-            if (collisionCount > 0) {
-                name = name + METHOD_NAME_COLLISION_SEPARATOR + collisionCount;
+        var generator = new HostedMethodNameFactory.NameGenerator() {
+
+            @Override
+            public HostedMethodNameFactory.MethodNameInfo generateMethodNameInfo(int collisionCount) {
+                String name = wrapped.wrapped.getName(); // want name w/o any multimethodkey suffix
+                if (key != ORIGINAL_METHOD) {
+                    name += StableMethodNameFormatter.MULTI_METHOD_KEY_SEPARATOR + key;
+                }
+                if (collisionCount > 0) {
+                    name = name + METHOD_NAME_COLLISION_SEPARATOR + collisionCount;
+                }
+
+                String uniqueShortName = generateUniqueName(name);
+
+                return new HostedMethodNameFactory.MethodNameInfo(name, uniqueShortName);
             }
-            String uniqueShortName = SubstrateUtil.uniqueShortName(holder.getJavaClass().getClassLoader(), holder, name, signature, wrapped.isConstructor());
 
-            return new HostedMethodNameFactory.MethodNameInfo(name, uniqueShortName);
+            @Override
+            public String generateUniqueName(String name) {
+                return SubstrateUtil.uniqueShortName(holder.getJavaClass().getClassLoader(), holder, name, signature, wrapped.isConstructor());
+            }
         };
 
-        HostedMethodNameFactory.MethodNameInfo names = HostedMethodNameFactory.singleton().createNames(nameGenerator, wrapped);
+        HostedMethodNameFactory.MethodNameInfo names = HostedMethodNameFactory.singleton().createNames(generator, wrapped);
 
         return new HostedMethod(wrapped, holder, signature, constantPool, handlers, names.name(), names.uniqueShortName(), localVariableTable, key, multiMethodMap);
     }

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/meta/HostedMethodNameFactory.java

@@ -27,35 +27,56 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.function.Function;
 
 import org.graalvm.nativeimage.ImageSingletons;
 
 import com.oracle.graal.pointsto.meta.AnalysisMethod;
 import com.oracle.svm.core.feature.AutomaticallyRegisteredFeature;
 import com.oracle.svm.core.feature.InternalFeature;
 import com.oracle.svm.core.imagelayer.ImageLayerBuildingSupport;
+import com.oracle.svm.core.option.HostedOptionKey;
 import com.oracle.svm.core.util.VMError;
 import com.oracle.svm.hosted.imagelayer.HostedDynamicLayerInfo;
+import com.oracle.svm.util.LogUtils;
+
+import jdk.graal.compiler.options.Option;
 
 @AutomaticallyRegisteredFeature
 public class HostedMethodNameFactory implements InternalFeature {
+    public static final class Options {
+        @Option(help = "Log unique names which do not match across layers. This is an experimental option which will be removed.") //
+        public static final HostedOptionKey<Boolean> LogUniqueNameInconsistencies = new HostedOptionKey<>(false);
+    }
+
     private Map<String, Integer> methodNameCount = new ConcurrentHashMap<>();
     private Set<String> uniqueShortNames = ConcurrentHashMap.newKeySet();
     private final boolean buildingExtensionLayer = ImageLayerBuildingSupport.buildingExtensionLayer();
     private Set<String> reservedUniqueShortNames = buildingExtensionLayer ? HostedDynamicLayerInfo.singleton().getReservedNames() : null;
+    private final boolean logUniqueNameInconsistencies = Options.LogUniqueNameInconsistencies.getValue();
 
     public record MethodNameInfo(String name, String uniqueShortName) {
     }
 
+    public interface NameGenerator {
+        MethodNameInfo generateMethodNameInfo(int collisionCount);
+
+        String generateUniqueName(String name);
+    }
+
     public static HostedMethodNameFactory singleton() {
         return ImageSingletons.lookup(HostedMethodNameFactory.class);
     }
 
-    MethodNameInfo createNames(Function<Integer, MethodNameInfo> nameGenerator, AnalysisMethod aMethod) {
+    MethodNameInfo createNames(NameGenerator generator, AnalysisMethod aMethod) {
         MethodNameInfo result = buildingExtensionLayer ? HostedDynamicLayerInfo.singleton().loadMethodNameInfo(aMethod) : null;
         if (result != null) {
             assert reservedUniqueShortNames.contains(result.uniqueShortName()) : result;
+            if (logUniqueNameInconsistencies) {
+                boolean consistentNames = generator.generateUniqueName(result.name()).equals(result.uniqueShortName);
+                if (!consistentNames) {
+                    LogUtils.warning("Unique names are inconsistent for %s", aMethod.getQualifiedName());
+                }
+            }
 
             boolean added = uniqueShortNames.add(result.uniqueShortName());
             if (added) {
@@ -67,13 +88,13 @@ MethodNameInfo createNames(Function<Integer, MethodNameInfo> nameGenerator, Anal
             }
         }
 
-        MethodNameInfo initialName = nameGenerator.apply(0);
+        MethodNameInfo initialName = generator.generateMethodNameInfo(0);
         result = initialName;
 
         do {
             int collisionCount = methodNameCount.merge(initialName.uniqueShortName(), 0, (oldValue, value) -> oldValue + 1);
             if (collisionCount != 0) {
-                result = nameGenerator.apply(collisionCount);
+                result = generator.generateMethodNameInfo(collisionCount);
             }
             /*
              * Redo if the short name is reserved.

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/meta/HostedUniverse.java

@@ -671,7 +671,7 @@ public int compare(HostedType o1, HostedType o2) {
 
             ClassLoader l1 = Optional.ofNullable(o1.getJavaClass()).map(Class::getClassLoader).orElse(null);
             ClassLoader l2 = Optional.ofNullable(o2.getJavaClass()).map(Class::getClassLoader).orElse(null);
-            result = SubstrateUtil.classLoaderNameAndId(l1).compareTo(SubstrateUtil.classLoaderNameAndId(l2));
+            result = SubstrateUtil.runtimeClassLoaderNameAndId(l1).compareTo(SubstrateUtil.runtimeClassLoaderNameAndId(l2));
             VMError.guarantee(result != 0, "HostedType objects not distinguishable by name and classloader: %s, %s", o1, o2);
             return result;
         }

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/util/HostedSubstrateUtilDefaultImpl.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2024, 2024, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.svm.hosted.util;
+
+import com.oracle.svm.core.feature.AutomaticallyRegisteredImageSingleton;
+import com.oracle.svm.core.util.HostedSubstrateUtil;
+import com.oracle.svm.hosted.ClassLoaderFeature;
+
+@AutomaticallyRegisteredImageSingleton(value = HostedSubstrateUtil.class)
+public class HostedSubstrateUtilDefaultImpl implements HostedSubstrateUtil {
+
+    @Override
+    public ClassLoader doGetRuntimeClassLoader(ClassLoader loader) {
+        return ClassLoaderFeature.getRuntimeClassLoader(loader);
+    }
+}