Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotVMConfigVerifier.java @ 23357:b05ad394cfd5
Add ResolvedJavaType.isAllocationClonable
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 28 Apr 2016 13:07:46 -0700 |
parents | d6cbb275d6ce |
children | a920338dd4d4 |
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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 jdk.vm.ci.hotspot; import static java.lang.String.format; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.Constructor; import java.lang.reflect.Executable; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.security.AccessControlException; import java.util.Arrays; import java.util.Objects; import jdk.vm.ci.common.JVMCIError; import jdk.internal.org.objectweb.asm.ClassReader; import jdk.internal.org.objectweb.asm.ClassVisitor; import jdk.internal.org.objectweb.asm.Label; import jdk.internal.org.objectweb.asm.MethodVisitor; import jdk.internal.org.objectweb.asm.Opcodes; import jdk.internal.org.objectweb.asm.Type; import sun.misc.Unsafe; /** * A verifier that checks that {@link HotSpotVMConfig} does not access {@link Unsafe} from any of * its non-static, non-constructor methods. This ensures that a deserialized {@link HotSpotVMConfig} * object does not perform any unsafe reads on addresses that are only valid in the context in which * the object was serialized. Note that this does not catch cases where a client uses an address * stored in a {@link HotSpotVMConfig} field. */ final class HotSpotVMConfigVerifier { public static boolean check() { Class<?> cls = HotSpotVMConfig.class; String classFilePath = "/" + cls.getName().replace('.', '/') + ".class"; try { InputStream classfile = cls.getResourceAsStream(classFilePath); ClassReader cr = new ClassReader(Objects.requireNonNull(classfile, "Could not find class file for " + cls.getName())); ClassVisitor cv = new Verifier(); cr.accept(cv, 0); return true; } catch (AccessControlException e) { /* * When running with a security manager and +UseJVMCIClassLoader the ASM classes might * not be accessible. */ return true; } catch (IOException e) { throw new JVMCIError(e); } } private static Class<?> resolve(String name) { try { return Class.forName(name.replace('/', '.')); } catch (ClassNotFoundException e) { throw new JVMCIError(e); } } private static class Verifier extends ClassVisitor { /** * Source file context for error reporting. */ String sourceFile = null; /** * Line number for error reporting. */ int lineNo = -1; Verifier() { super(Opcodes.ASM5); } @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: %s is not allowed in the context of compilation replay. The unsafe access should be moved into the %s constructor and the result cached in a field", sourceFile, lineNo, message, HotSpotVMConfig.class.getSimpleName()); throw new JVMCIError(errorMessage); } @Override public MethodVisitor visitMethod(int access, String name, String d, String signature, String[] exceptions) { if (!Modifier.isStatic(access) && Modifier.isPublic(access) && !name.equals("<init>")) { return new MethodVisitor(Opcodes.ASM5) { @Override public void visitLineNumber(int line, Label start) { lineNo = line; } private Executable resolveMethod(String owner, String methodName, String methodDesc) { Class<?> declaringClass = resolve(owner); while (declaringClass != null) { 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; } } } } } declaringClass = declaringClass.getSuperclass(); } throw new NoSuchMethodError(owner + "." + methodName + methodDesc); } /** * Checks whether a given method is allowed to be called. */ private boolean checkInvokeTarget(Executable method) { if (method.getDeclaringClass().equals(Unsafe.class)) { return false; } return true; } @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; } } } }