/*
 * Copyright (c) 2015, 2018, 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.
 *
 * 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.
 *
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package jdk.vm.ci.hotspot;

import jdk.vm.ci.code.stack.InspectedFrameVisitor;
import jdk.vm.ci.code.stack.StackIntrospection;
import jdk.vm.ci.meta.ResolvedJavaMethod;

public class HotSpotStackIntrospection implements StackIntrospection {

    protected final HotSpotJVMCIRuntime runtime;

    public HotSpotStackIntrospection(HotSpotJVMCIRuntime runtime) {
        this.runtime = runtime;
    }

    @Override
    public <T> T iterateFrames(ResolvedJavaMethod[] initialMethods, ResolvedJavaMethod[] matchingMethods, int initialSkip, InspectedFrameVisitor<T> visitor) {
        CompilerToVM compilerToVM = runtime.getCompilerToVM();
        return compilerToVM.iterateFrames(initialMethods, matchingMethods, initialSkip, visitor);
    }

    @Override
    public boolean canMaterializeVirtualObjects() {
        // Virtual threads do not support materializing locals (JDK-8307125)
        return !Thread.currentThread().isVirtual();
    }
}
