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package org.graalvm.compiler.hotspot.phases;

import static org.graalvm.compiler.nodes.ConstantNode.getConstantNodes;

import org.graalvm.compiler.nodes.ConstantNode;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.nodes.spi.CoreProviders;
import org.graalvm.compiler.nodes.type.StampTool;
import org.graalvm.compiler.phases.VerifyPhase;

import jdk.vm.ci.hotspot.HotSpotObjectConstant;
import jdk.vm.ci.meta.JavaKind;

Checks for illegal object constants in a graph processed for AOT compilation.
See Also:
/** * Checks for {@link #isIllegalObjectConstant(ConstantNode) illegal} object constants in a graph * processed for AOT compilation. * * @see LoadJavaMirrorWithKlassPhase */
public class AheadOfTimeVerificationPhase extends VerifyPhase<CoreProviders> { @Override protected void verify(StructuredGraph graph, CoreProviders context) { for (ConstantNode node : getConstantNodes(graph)) { if (isIllegalObjectConstant(node)) { throw new VerificationError("illegal object constant: " + node); } } } public static boolean isIllegalObjectConstant(ConstantNode node) { return isObject(node) && !isNullReference(node) && !isInternedString(node) && !isDirectMethodHandle(node) && !isBoundMethodHandle(node) && !isVarHandle(node); } private static boolean isObject(ConstantNode node) { return node.getStackKind() == JavaKind.Object; } private static boolean isNullReference(ConstantNode node) { return isObject(node) && node.isNullConstant(); } private static boolean isDirectMethodHandle(ConstantNode node) { String typeName = StampTool.typeOrNull(node).getName(); if (!isObject(node)) { return false; } switch (typeName) { case "Ljava/lang/invoke/DirectMethodHandle;": case "Ljava/lang/invoke/DirectMethodHandle$StaticAccessor;": case "Ljava/lang/invoke/DirectMethodHandle$Accessor;": case "Ljava/lang/invoke/DirectMethodHandle$Constructor;": case "Ljava/lang/invoke/DirectMethodHandle$Special;": case "Ljava/lang/invoke/DirectMethodHandle$Interface;": return true; default: return false; } } private static boolean isBoundMethodHandle(ConstantNode node) { if (!isObject(node)) { return false; } return StampTool.typeOrNull(node).getName().startsWith("Ljava/lang/invoke/BoundMethodHandle"); } private static boolean isVarHandle(ConstantNode node) { if (!isObject(node)) { return false; } String name = StampTool.typeOrNull(node).getName(); return name.equals("Ljava/lang/invoke/VarHandle$AccessDescriptor;"); } private static boolean isInternedString(ConstantNode node) { if (!isObject(node)) { return false; } HotSpotObjectConstant c = (HotSpotObjectConstant) node.asConstant(); return c.isInternedString(); } }