GeneratedInvocationPlugin.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.nodes.graphbuilderconf;
24
25import java.lang.reflect.Method;
26
27import org.graalvm.compiler.debug.GraalError;
28import org.graalvm.compiler.nodes.ValueNode;
29
30import jdk.vm.ci.meta.MetaAccessProvider;
31import jdk.vm.ci.meta.ResolvedJavaMethod;
32import jdk.vm.ci.meta.ResolvedJavaType;
33
34public abstract class GeneratedInvocationPlugin implements InvocationPlugin {
35
36    @Override
37    public abstract boolean execute(GraphBuilderContext b, ResolvedJavaMethod targetMethod, InvocationPlugin.Receiver receiver, ValueNode[] args);
38
39    @Override
40    public StackTraceElement getApplySourceLocation(MetaAccessProvider metaAccess) {
41        Class<?> c = getClass();
42        for (Method m : c.getDeclaredMethods()) {
43            if (m.getName().equals("execute")) {
44                return metaAccess.lookupJavaMethod(m).asStackTraceElement(0);
45            }
46        }
47        throw new GraalError("could not find method named \"execute\" in " + c.getName());
48    }
49
50    protected boolean checkInjectedArgument(GraphBuilderContext b, ValueNode arg, ResolvedJavaMethod foldAnnotatedMethod) {
51        if (arg.isNullConstant()) {
52            return true;
53        }
54
55        MetaAccessProvider metaAccess = b.getMetaAccess();
56        ResolvedJavaMethod executeMethod = metaAccess.lookupJavaMethod(getExecuteMethod());
57        ResolvedJavaType thisClass = metaAccess.lookupJavaType(getClass());
58        ResolvedJavaMethod thisExecuteMethod = thisClass.resolveConcreteMethod(executeMethod, thisClass);
59        if (b.getMethod().equals(thisExecuteMethod)) {
60            // The "execute" method of this plugin is itself being compiled. In (only) this context,
61            // the injected argument of the call to the @Fold annotated method will be non-null.
62            return true;
63        }
64        throw new AssertionError("must pass null to injected argument of " + foldAnnotatedMethod.format("%H.%n(%p)"));
65    }
66
67    private static Method getExecuteMethod() {
68        try {
69            return GeneratedInvocationPlugin.class.getMethod("execute", GraphBuilderContext.class, ResolvedJavaMethod.class, InvocationPlugin.Receiver.class, ValueNode[].class);
70        } catch (NoSuchMethodException | SecurityException e) {
71            throw new GraalError(e);
72        }
73    }
74}
75