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/*
 * Copyright (c) 2013, 2022, 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
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package jdk.graal.compiler.phases;

import java.util.Optional;

import jdk.graal.compiler.nodes.CallTargetNode;
import jdk.graal.compiler.nodes.GraphState;
import jdk.graal.compiler.nodes.Invoke;
import jdk.graal.compiler.nodes.StructuredGraph;

import jdk.vm.ci.meta.MetaAccessProvider;
import jdk.vm.ci.meta.ResolvedJavaType;

/***
 * Verifies a {@linkplain #verify graph} or {@linkplain #verifyClass class} against one or more
 * invariants.
 */
public abstract class VerifyPhase extends BasePhase {

    /**
     * Thrown when verification performed by a {@link VerifyPhase} fails.
     */
    @SuppressWarnings("serial")
    public static class VerificationError extends AssertionError {

        public VerificationError(String format, Object... args) {
            super(String.format(format, args));
        }

        public VerificationError(String message, Throwable cause) {
            super(message, cause);
        }

        public VerificationError(Invoke invoke, String format, Object... args) {
            this(String.format("In %s: %s", invoke.asNode().graph().method().asStackTraceElement(invoke.bci()), format), args);
        }

        public VerificationError(CallTargetNode target, String format, Object... args) {
            this(target.invoke(), format, args);
        }
    }

    @Override
    public Optional notApplicableTo(GraphState graphState) {
        return ALWAYS_APPLICABLE;
    }

    @Override
    protected final void run(StructuredGraph graph, C context) {
        verify(graph, context);
    }

    /**
     * Checks {@code graph} against some invariants.
     *
     * @throws VerificationError if the verification fails
     */
    protected abstract void verify(StructuredGraph graph, C context);

    /**
     * Checks {@code clazz} against some invariants.
     *
     * @param clazz the class to verify
     * @param metaAccess an object to get a {@link ResolvedJavaType} for {@code clazz}
     * @throws VerificationError if the class violates some invariant
     */
    public void verifyClass(Class clazz, MetaAccessProvider metaAccess) {
    }
}