CTVMUtilities.java revision 11707:ad7af1afda7a 
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 */
23
24package compiler.jvmci.common;
25
26import jdk.internal.org.objectweb.asm.ClassReader;
27import jdk.internal.org.objectweb.asm.ClassVisitor;
28import jdk.internal.org.objectweb.asm.ClassWriter;
29import jdk.internal.org.objectweb.asm.Label;
30import jdk.internal.org.objectweb.asm.MethodVisitor;
31import jdk.internal.org.objectweb.asm.Opcodes;
32import jdk.internal.org.objectweb.asm.tree.ClassNode;
33import jdk.test.lib.Utils;
34import jdk.vm.ci.code.InstalledCode;
35import jdk.vm.ci.hotspot.CompilerToVMHelper;
36import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
37
38import java.io.IOException;
39import java.lang.reflect.Constructor;
40import java.lang.reflect.Executable;
41import java.lang.reflect.Field;
42import java.lang.reflect.Method;
43import java.lang.reflect.Modifier;
44import java.lang.reflect.Module;
45import java.lang.reflect.Parameter;
46import java.util.HashMap;
47import java.util.Map;
48import java.util.TreeMap;
49
50public class CTVMUtilities {
51    /*
52     * A method to return HotSpotResolvedJavaMethod object using class object
53     * and method as input
54     */
55    public static HotSpotResolvedJavaMethod getResolvedMethod(Class<?> cls,
56            Executable method) {
57        if (!(method instanceof Method || method instanceof Constructor)) {
58            throw new Error("wrong executable type " + method.getClass());
59        }
60        Field slotField;
61        int slot;
62        try {
63            slotField = method.getClass().getDeclaredField("slot");
64            boolean old = slotField.isAccessible();
65            slotField.setAccessible(true);
66            slot = slotField.getInt(method);
67            slotField.setAccessible(old);
68        } catch (ReflectiveOperationException e) {
69            throw new Error("TEST BUG: Can't get slot field", e);
70        }
71        return CompilerToVMHelper.getResolvedJavaMethodAtSlot(cls, slot);
72    }
73
74    public static HotSpotResolvedJavaMethod getResolvedMethod(
75            Executable method) {
76        return getResolvedMethod(method.getDeclaringClass(), method);
77    }
78
79    public static InstalledCode getInstalledCode(String name, long address,
80            long entryPoint) {
81        return new InstalledCodeStub(name, address, entryPoint);
82    }
83    private static class InstalledCodeStub extends InstalledCode {
84        private InstalledCodeStub(String name, long address, long entryPoint) {
85            super(name);
86            this.address = address;
87            this.entryPoint = entryPoint;
88        }
89    }
90    public static Map<Integer, Integer> getBciToLineNumber(Executable method) {
91        Map<Integer, Integer> lineNumbers = new TreeMap<>();
92        Class<?> aClass = method.getDeclaringClass();
93        ClassReader cr;
94        try {
95            Module aModule = aClass.getModule();
96            String name = aClass.getName();
97            cr = new ClassReader(aModule.getResourceAsStream(
98                    name.replace('.', '/') + ".class"));
99        } catch (IOException e) {
100                        throw new Error("TEST BUG: can read " + aClass.getName() + " : " + e, e);
101        }
102        ClassNode cn = new ClassNode();
103        cr.accept(cn, ClassReader.EXPAND_FRAMES);
104
105        Map<Label, Integer> labels = new HashMap<>();
106        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
107        ClassVisitor cv = new ClassVisitorForLabels(cw, labels, method);
108        cr.accept(cv, ClassReader.EXPAND_FRAMES);
109        labels.forEach((k, v) -> lineNumbers.put(k.getOffset(), v));
110        boolean isEmptyMethod = Modifier.isAbstract(method.getModifiers())
111                || Modifier.isNative(method.getModifiers());
112        if (lineNumbers.isEmpty() && !isEmptyMethod) {
113            throw new Error(method + " doesn't contains the line numbers table "
114                    +"(the method marked neither abstract nor native)");
115        }
116        return lineNumbers;
117    }
118
119    private static class ClassVisitorForLabels extends ClassVisitor {
120        private final Map<Label, Integer> lineNumbers;
121        private final String targetName;
122        private final String targetDesc;
123
124        public ClassVisitorForLabels(ClassWriter cw, Map<Label, Integer> lines,
125                                     Executable target) {
126            super(Opcodes.ASM5, cw);
127            this.lineNumbers = lines;
128
129            StringBuilder builder = new StringBuilder("(");
130            for (Parameter parameter : target.getParameters()) {
131                builder.append(Utils.toJVMTypeSignature(parameter.getType()));
132            }
133            builder.append(")");
134            if (target instanceof Constructor) {
135                targetName = "<init>";
136                builder.append("V");
137            } else {
138                targetName = target.getName();
139                builder.append(Utils.toJVMTypeSignature(
140                        ((Method) target).getReturnType()));
141            }
142            targetDesc = builder.toString();
143        }
144
145        @Override
146        public final MethodVisitor visitMethod(int access, String name,
147                                               String desc, String signature,
148                                               String[] exceptions) {
149            MethodVisitor mv = cv.visitMethod(access, name, desc, signature,
150                    exceptions);
151            if (targetDesc.equals(desc) && targetName.equals(name)) {
152                return new MethodVisitor(Opcodes.ASM5, mv) {
153                    @Override
154                    public void visitLineNumber(int i, Label label) {
155                        super.visitLineNumber(i, label);
156                        lineNumbers.put(label, i);
157                    }
158                };
159            }
160            return  mv;
161        }
162    }
163}
164