Mercurial > hg > truffle
view graal/com.oracle.jvmci.options.processor/src/com/oracle/jvmci/options/processor/OptionsVerifier.java @ 21654:cd6b1b2189a0
Remove GuardingPiNode and replace with FixedGuardNode + PiNode.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 02 Jun 2015 11:45:43 +0200 |
parents | 47bebae7454f |
children | 5b9adb645217 |
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/* * Copyright (c) 2014, 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.jvmci.options.processor; import static java.lang.String.*; import java.io.*; import java.lang.reflect.*; import java.util.*; import jdk.internal.org.objectweb.asm.*; import jdk.internal.org.objectweb.asm.Type; import com.oracle.jvmci.options.*; /** * A {@link ClassVisitor} that verifies a class declaring one or more {@linkplain OptionValue * options} has a class initializer that only initializes the option(s). This sanity check mitigates * the possibility of an option value being used before the code that sets the value (e.g., from the * command line) has been executed. */ final class OptionsVerifier extends ClassVisitor { public static void checkClass(Class<?> cls, OptionDescriptor option, Set<Class<?>> checked, GraalJars graalJars) throws IOException { if (!checked.contains(cls)) { checked.add(cls); Class<?> superclass = cls.getSuperclass(); if (superclass != null && !superclass.equals(Object.class)) { checkClass(superclass, option, checked, graalJars); } String classFilePath = cls.getName().replace('.', '/') + ".class"; ClassReader cr = new ClassReader(Objects.requireNonNull(graalJars.getInputStream(classFilePath), "Could not find class file for " + cls.getName())); ClassVisitor cv = new OptionsVerifier(cls, option); cr.accept(cv, 0); } } /** * The option field context of the verification. */ private final OptionDescriptor option; /** * The class in which {@link #option} is declared or a super-class of that class. This is the * class whose {@code <clinit>} method is being verified. */ private final Class<?> cls; /** * Source file context for error reporting. */ String sourceFile = null; /** * Line number for error reporting. */ int lineNo = -1; final Class<?>[] boxingTypes = {Boolean.class, Byte.class, Short.class, Character.class, Integer.class, Float.class, Long.class, Double.class}; private static Class<?> resolve(String name) { try { return Class.forName(name.replace('/', '.')); } catch (ClassNotFoundException e) { throw new InternalError(e); } } OptionsVerifier(Class<?> cls, OptionDescriptor desc) { super(Opcodes.ASM5); this.cls = cls; this.option = desc; } @Override public void visitSource(String source, String debug) { this.sourceFile = source; } void verify(boolean condition, String message) { if (!condition) { error(message); } } void error(String message) { String errorMessage = format("%s:%d: Illegal code in %s.<clinit> which may be executed when %s.%s is initialized:%n%n %s%n%n" + "The recommended solution is to move " + option.getName() + " into a separate class (e.g., %s.Options).%n", sourceFile, lineNo, cls.getSimpleName(), option.getDeclaringClass().getSimpleName(), option.getName(), message, option.getDeclaringClass().getSimpleName()); throw new InternalError(errorMessage); } @Override public MethodVisitor visitMethod(int access, String name, String d, String signature, String[] exceptions) { if (name.equals("<clinit>")) { return new MethodVisitor(Opcodes.ASM5) { @Override public void visitLineNumber(int line, Label start) { lineNo = line; } @Override public void visitFieldInsn(int opcode, String owner, String fieldName, String fieldDesc) { if (opcode == Opcodes.PUTFIELD || opcode == Opcodes.PUTSTATIC) { verify(resolve(owner).equals(option.getDeclaringClass()), format("store to field %s.%s", resolve(owner).getSimpleName(), fieldName)); verify(opcode != Opcodes.PUTFIELD, format("store to non-static field %s.%s", resolve(owner).getSimpleName(), fieldName)); } } private Executable resolveMethod(String owner, String methodName, String methodDesc) { Class<?> declaringClass = resolve(owner); if (methodName.equals("<init>")) { for (Constructor<?> c : declaringClass.getDeclaredConstructors()) { if (methodDesc.equals(Type.getConstructorDescriptor(c))) { return c; } } } else { Type[] argumentTypes = Type.getArgumentTypes(methodDesc); for (Method m : declaringClass.getDeclaredMethods()) { if (m.getName().equals(methodName)) { if (Arrays.equals(argumentTypes, Type.getArgumentTypes(m))) { if (Type.getReturnType(methodDesc).equals(Type.getReturnType(m))) { return m; } } } } } throw new NoSuchMethodError(declaringClass + "." + methodName + methodDesc); } /** * Checks whether a given method is allowed to be called. */ private boolean checkInvokeTarget(Executable method) { Class<?> holder = method.getDeclaringClass(); if (method instanceof Constructor) { if (OptionValue.class.isAssignableFrom(holder)) { return true; } } else if (Arrays.asList(boxingTypes).contains(holder)) { return method.getName().equals("valueOf"); } else if (method.getDeclaringClass().equals(Class.class)) { return method.getName().equals("desiredAssertionStatus"); } return false; } @Override public void visitMethodInsn(int opcode, String owner, String methodName, String methodDesc, boolean itf) { Executable callee = resolveMethod(owner, methodName, methodDesc); verify(checkInvokeTarget(callee), "invocation of " + callee); } }; } else { return null; } } }