/* * Copyright (c) 2001, 2008, 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 * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.reflect; import java.lang.reflect.*;import java.security.AccessController;import java.security.PrivilegedAction;import sun.misc.Unsafe; /** Generator for sun.reflect.MethodAccessor and sun.reflect.ConstructorAccessor objects using bytecodes to implement reflection. A java.lang.reflect.Method or java.lang.reflect.Constructor object can delegate its invoke or newInstance method to an accessor using native code or to one generated by this class. (Methods and Constructors were merged together in this class to ensure maximum code sharing.) */ class MethodAccessorGenerator extends AccessorGenerator { private static final short NUM_BASE_CPOOL_ENTRIES = (short) 12; // One for invoke() plus one for constructor private static final short NUM_METHODS = (short) 2; // Only used if forSerialization is true private static final short NUM_SERIALIZATION_CPOOL_ENTRIES = (short) 2; private static volatile int methodSymnum = 0; private static volatile int constructorSymnum = 0; private static volatile int serializationConstructorSymnum = 0; private Class declaringClass; private Class[] parameterTypes; private Class returnType; private boolean isConstructor; private boolean forSerialization; private short targetMethodRef; private short invokeIdx; private short invokeDescriptorIdx; // Constant pool index of CONSTANT_Class_info for first // non-primitive parameter type. Should be incremented by 2. private short nonPrimitiveParametersBaseIdx; MethodAccessorGenerator() { } /** This routine is not thread-safe */ public MethodAccessor generateMethod(Class declaringClass, String name, Class[] parameterTypes, Class returnType, Class[] checkedExceptions, int modifiers) { return (MethodAccessor) generate(declaringClass, name, parameterTypes, returnType, checkedExceptions, modifiers, false, false, null); } /** This routine is not thread-safe */ public ConstructorAccessor generateConstructor(Class declaringClass, Class[] parameterTypes, Class[] checkedExceptions, int modifiers) { return (ConstructorAccessor) generate(declaringClass, "<init>", parameterTypes, Void.TYPE, checkedExceptions, modifiers, true, false, null); } /** This routine is not thread-safe */ public SerializationConstructorAccessorImpl generateSerializationConstructor(Class declaringClass, Class[] parameterTypes, Class[] checkedExceptions, int modifiers, Class targetConstructorClass) { return (SerializationConstructorAccessorImpl) generate(declaringClass, "<init>", parameterTypes, Void.TYPE, checkedExceptions, modifiers, true, true, targetConstructorClass); } /** This routine is not thread-safe */ private MagicAccessorImpl generate(final Class declaringClass, String name, Class[] parameterTypes, Class returnType, Class[] checkedExceptions, int modifiers, boolean isConstructor, boolean forSerialization, Class serializationTargetClass) { ByteVector vec = ByteVectorFactory.create(); asm = new ClassFileAssembler(vec); this.declaringClass = declaringClass; this.parameterTypes = parameterTypes; this.returnType = returnType; this.modifiers = modifiers; this.isConstructor = isConstructor; this.forSerialization = forSerialization; asm.emitMagicAndVersion(); // Constant pool entries: // ( * = Boxing information: optional) // (+ = Shared entries provided by AccessorGenerator) // (^ = Only present if generating SerializationConstructorAccessor) // [UTF-8] [This class's name] // [CONSTANT_Class_info] for above // [UTF-8] "sun/reflect/{MethodAccessorImpl,ConstructorAccessorImpl,SerializationConstructorAccessorImpl}" // [CONSTANT_Class_info] for above // [UTF-8] [Target class's name] // [CONSTANT_Class_info] for above // ^ [UTF-8] [Serialization: Class's name in which to invoke constructor] // ^ [CONSTANT_Class_info] for above // [UTF-8] target method or constructor name // [UTF-8] target method or constructor signature // [CONSTANT_NameAndType_info] for above // [CONSTANT_Methodref_info or CONSTANT_InterfaceMethodref_info] for target method // [UTF-8] "invoke" or "newInstance" // [UTF-8] invoke or newInstance descriptor // [UTF-8] descriptor for type of non-primitive parameter 1 // [CONSTANT_Class_info] for type of non-primitive parameter 1 // ... // [UTF-8] descriptor for type of non-primitive parameter n // [CONSTANT_Class_info] for type of non-primitive parameter n // + [UTF-8] "java/lang/Exception" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/ClassCastException" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/NullPointerException" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/IllegalArgumentException" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/InvocationTargetException" // + [CONSTANT_Class_info] for above // + [UTF-8] "<init>" // + [UTF-8] "()V" // + [CONSTANT_NameAndType_info] for above // + [CONSTANT_Methodref_info] for NullPointerException's constructor // + [CONSTANT_Methodref_info] for IllegalArgumentException's constructor // + [UTF-8] "(Ljava/lang/String;)V" // + [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/String;)V" // + [CONSTANT_Methodref_info] for IllegalArgumentException's constructor taking a String // + [UTF-8] "(Ljava/lang/Throwable;)V" // + [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/Throwable;)V" // + [CONSTANT_Methodref_info] for InvocationTargetException's constructor // + [CONSTANT_Methodref_info] for "super()" // + [UTF-8] "java/lang/Object" // + [CONSTANT_Class_info] for above // + [UTF-8] "toString" // + [UTF-8] "()Ljava/lang/String;" // + [CONSTANT_NameAndType_info] for "toString()Ljava/lang/String;" // + [CONSTANT_Methodref_info] for Object's toString method // + [UTF-8] "Code" // + [UTF-8] "Exceptions" // * [UTF-8] "java/lang/Boolean" // * [CONSTANT_Class_info] for above // * [UTF-8] "(Z)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "booleanValue" // * [UTF-8] "()Z" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Byte" // * [CONSTANT_Class_info] for above // * [UTF-8] "(B)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "byteValue" // * [UTF-8] "()B" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Character" // * [CONSTANT_Class_info] for above // * [UTF-8] "(C)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "charValue" // * [UTF-8] "()C" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Double" // * [CONSTANT_Class_info] for above // * [UTF-8] "(D)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "doubleValue" // * [UTF-8] "()D" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Float" // * [CONSTANT_Class_info] for above // * [UTF-8] "(F)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "floatValue" // * [UTF-8] "()F" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Integer" // * [CONSTANT_Class_info] for above // * [UTF-8] "(I)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "intValue" // * [UTF-8] "()I" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Long" // * [CONSTANT_Class_info] for above // * [UTF-8] "(J)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "longValue" // * [UTF-8] "()J" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Short" // * [CONSTANT_Class_info] for above // * [UTF-8] "(S)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "shortValue" // * [UTF-8] "()S" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above short numCPEntries = NUM_BASE_CPOOL_ENTRIES + NUM_COMMON_CPOOL_ENTRIES; boolean usesPrimitives = usesPrimitiveTypes(); if (usesPrimitives) { numCPEntries += NUM_BOXING_CPOOL_ENTRIES; } if (forSerialization) { numCPEntries += NUM_SERIALIZATION_CPOOL_ENTRIES; } // Add in variable-length number of entries to be able to describe // non-primitive parameter types and checked exceptions. numCPEntries += (short) (2 * numNonPrimitiveParameterTypes()); asm.emitShort(add(numCPEntries, S1)); final String generatedName = generateName(isConstructor, forSerialization); asm.emitConstantPoolUTF8(generatedName); asm.emitConstantPoolClass(asm.cpi()); thisClass = asm.cpi(); if (isConstructor) { if (forSerialization) { asm.emitConstantPoolUTF8 ("sun/reflect/SerializationConstructorAccessorImpl"); } else { asm.emitConstantPoolUTF8("sun/reflect/ConstructorAccessorImpl"); } } else { asm.emitConstantPoolUTF8("sun/reflect/MethodAccessorImpl"); } asm.emitConstantPoolClass(asm.cpi()); superClass = asm.cpi(); asm.emitConstantPoolUTF8(getClassName(declaringClass, false)); asm.emitConstantPoolClass(asm.cpi()); targetClass = asm.cpi(); short serializationTargetClassIdx = (short) 0; if (forSerialization) { asm.emitConstantPoolUTF8(getClassName(serializationTargetClass, false)); asm.emitConstantPoolClass(asm.cpi()); serializationTargetClassIdx = asm.cpi(); } asm.emitConstantPoolUTF8(name); asm.emitConstantPoolUTF8(buildInternalSignature()); asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); if (isInterface()) { asm.emitConstantPoolInterfaceMethodref(targetClass, asm.cpi()); } else { if (forSerialization) { asm.emitConstantPoolMethodref(serializationTargetClassIdx, asm.cpi()); } else { asm.emitConstantPoolMethodref(targetClass, asm.cpi()); } } targetMethodRef = asm.cpi(); if (isConstructor) { asm.emitConstantPoolUTF8("newInstance"); } else { asm.emitConstantPoolUTF8("invoke"); } invokeIdx = asm.cpi(); if (isConstructor) { asm.emitConstantPoolUTF8("([Ljava/lang/Object;)Ljava/lang/Object;"); } else { asm.emitConstantPoolUTF8 ("(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;"); } invokeDescriptorIdx = asm.cpi(); // Output class information for non-primitive parameter types nonPrimitiveParametersBaseIdx = add(asm.cpi(), S2); for (int i = 0; i < parameterTypes.length; i++) { Class c = parameterTypes[i]; if (!isPrimitive(c)) { asm.emitConstantPoolUTF8(getClassName(c, false)); asm.emitConstantPoolClass(asm.cpi()); } } // Entries common to FieldAccessor, MethodAccessor and ConstructorAccessor emitCommonConstantPoolEntries(); // Boxing entries if (usesPrimitives) { emitBoxingContantPoolEntries(); } if (asm.cpi() != numCPEntries) { throw new InternalError("Adjust this code (cpi = " + asm.cpi() + ", numCPEntries = " + numCPEntries + ")"); } // Access flags asm.emitShort(ACC_PUBLIC); // This class asm.emitShort(thisClass); // Superclass asm.emitShort(superClass); // Interfaces count and interfaces asm.emitShort(S0); // Fields count and fields asm.emitShort(S0); // Methods count and methods asm.emitShort(NUM_METHODS); emitConstructor(); emitInvoke(); // Additional attributes (none) asm.emitShort(S0); // Load class vec.trim(); final byte[] bytes = vec.getData(); // Note: the class loader is the only thing that really matters // here -- it's important to get the generated code into the // same namespace as the target class. Since the generated code // is privileged anyway, the protection domain probably doesn't // matter. return AccessController.doPrivileged( new PrivilegedAction<MagicAccessorImpl>() { public MagicAccessorImpl run() { try { return (MagicAccessorImpl) ClassDefiner.defineClass (generatedName, bytes, 0, bytes.length, declaringClass.getClassLoader()).newInstance(); } catch (InstantiationException e) { throw (InternalError) new InternalError().initCause(e); } catch (IllegalAccessException e) { throw (InternalError) new InternalError().initCause(e); } } }); } /** This emits the code for either invoke() or newInstance() */ private void emitInvoke() { // NOTE that this code will only handle 65535 parameters since we // use the sipush instruction to get the array index on the // operand stack. if (parameterTypes.length > 65535) { throw new InternalError("Can't handle more than 65535 parameters"); } // Generate code into fresh code buffer ClassFileAssembler cb = new ClassFileAssembler(); if (isConstructor) { // 1 incoming argument cb.setMaxLocals(2); } else { // 2 incoming arguments cb.setMaxLocals(3); } short illegalArgStartPC = 0; if (isConstructor) { // Instantiate target class before continuing // new <target class type> // dup cb.opc_new(targetClass); cb.opc_dup(); } else { // Setup before iterating down argument list if (isPrimitive(returnType)) { // new <boxing type for primitive type> // dup // ... (see below:) // invokespecial <constructor for boxing type for primitive type> // areturn cb.opc_new(indexForPrimitiveType(returnType)); cb.opc_dup(); } // Get target object on operand stack if necessary. // We need to do an explicit null check here; we won't see // NullPointerExceptions from the invoke bytecode, since it's // covered by an exception handler. if (!isStatic()) { // aload_1 // ifnonnull <checkcast label> // new <NullPointerException> // dup // invokespecial <NullPointerException ctor> // athrow // <checkcast label:> // aload_1 // checkcast <target class's type> cb.opc_aload_1(); Label l = new Label(); cb.opc_ifnonnull(l); cb.opc_new(nullPointerClass); cb.opc_dup(); cb.opc_invokespecial(nullPointerCtorIdx, 0, 0); cb.opc_athrow(); l.bind(); illegalArgStartPC = cb.getLength(); cb.opc_aload_1(); cb.opc_checkcast(targetClass); } } // Have to check length of incoming array and throw // IllegalArgumentException if not correct. A concession to the // JCK (isn't clearly specified in the spec): we allow null in the // case where the argument list is zero length. // if no-arg: // aload_2 | aload_1 (Method | Constructor) // ifnull <success label> // aload_2 | aload_1 // arraylength // sipush <num parameter types> // if_icmpeq <success label> // new <IllegalArgumentException> // dup // invokespecial <IllegalArgumentException ctor> // athrow // <success label:>Lines 1–500 of 782. Load more
/* * Copyright (c) 2001, 2008, 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 * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.reflect; import java.lang.reflect.*; import java.security.AccessController; import java.security.PrivilegedAction; import sun.misc.Unsafe; /** Generator for sun.reflect.MethodAccessor and sun.reflect.ConstructorAccessor objects using bytecodes to implement reflection. A java.lang.reflect.Method or java.lang.reflect.Constructor object can delegate its invoke or newInstance method to an accessor using native code or to one generated by this class. (Methods and Constructors were merged together in this class to ensure maximum code sharing.) */ class MethodAccessorGenerator extends AccessorGenerator { private static final short NUM_BASE_CPOOL_ENTRIES = (short) 12; // One for invoke() plus one for constructor private static final short NUM_METHODS = (short) 2; // Only used if forSerialization is true private static final short NUM_SERIALIZATION_CPOOL_ENTRIES = (short) 2; private static volatile int methodSymnum = 0; private static volatile int constructorSymnum = 0; private static volatile int serializationConstructorSymnum = 0; private Class declaringClass; private Class[] parameterTypes; private Class returnType; private boolean isConstructor; private boolean forSerialization; private short targetMethodRef; private short invokeIdx; private short invokeDescriptorIdx; // Constant pool index of CONSTANT_Class_info for first // non-primitive parameter type. Should be incremented by 2. private short nonPrimitiveParametersBaseIdx; MethodAccessorGenerator() { } /** This routine is not thread-safe */ public MethodAccessor generateMethod(Class declaringClass, String name, Class[] parameterTypes, Class returnType, Class[] checkedExceptions, int modifiers) { return (MethodAccessor) generate(declaringClass, name, parameterTypes, returnType, checkedExceptions, modifiers, false, false, null); } /** This routine is not thread-safe */ public ConstructorAccessor generateConstructor(Class declaringClass, Class[] parameterTypes, Class[] checkedExceptions, int modifiers) { return (ConstructorAccessor) generate(declaringClass, "<init>", parameterTypes, Void.TYPE, checkedExceptions, modifiers, true, false, null); } /** This routine is not thread-safe */ public SerializationConstructorAccessorImpl generateSerializationConstructor(Class declaringClass, Class[] parameterTypes, Class[] checkedExceptions, int modifiers, Class targetConstructorClass) { return (SerializationConstructorAccessorImpl) generate(declaringClass, "<init>", parameterTypes, Void.TYPE, checkedExceptions, modifiers, true, true, targetConstructorClass); } /** This routine is not thread-safe */ private MagicAccessorImpl generate(final Class declaringClass, String name, Class[] parameterTypes, Class returnType, Class[] checkedExceptions, int modifiers, boolean isConstructor, boolean forSerialization, Class serializationTargetClass) { ByteVector vec = ByteVectorFactory.create(); asm = new ClassFileAssembler(vec); this.declaringClass = declaringClass; this.parameterTypes = parameterTypes; this.returnType = returnType; this.modifiers = modifiers; this.isConstructor = isConstructor; this.forSerialization = forSerialization; asm.emitMagicAndVersion(); // Constant pool entries: // ( * = Boxing information: optional) // (+ = Shared entries provided by AccessorGenerator) // (^ = Only present if generating SerializationConstructorAccessor) // [UTF-8] [This class's name] // [CONSTANT_Class_info] for above // [UTF-8] "sun/reflect/{MethodAccessorImpl,ConstructorAccessorImpl,SerializationConstructorAccessorImpl}" // [CONSTANT_Class_info] for above // [UTF-8] [Target class's name] // [CONSTANT_Class_info] for above // ^ [UTF-8] [Serialization: Class's name in which to invoke constructor] // ^ [CONSTANT_Class_info] for above // [UTF-8] target method or constructor name // [UTF-8] target method or constructor signature // [CONSTANT_NameAndType_info] for above // [CONSTANT_Methodref_info or CONSTANT_InterfaceMethodref_info] for target method // [UTF-8] "invoke" or "newInstance" // [UTF-8] invoke or newInstance descriptor // [UTF-8] descriptor for type of non-primitive parameter 1 // [CONSTANT_Class_info] for type of non-primitive parameter 1 // ... // [UTF-8] descriptor for type of non-primitive parameter n // [CONSTANT_Class_info] for type of non-primitive parameter n // + [UTF-8] "java/lang/Exception" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/ClassCastException" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/NullPointerException" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/IllegalArgumentException" // + [CONSTANT_Class_info] for above // + [UTF-8] "java/lang/InvocationTargetException" // + [CONSTANT_Class_info] for above // + [UTF-8] "<init>" // + [UTF-8] "()V" // + [CONSTANT_NameAndType_info] for above // + [CONSTANT_Methodref_info] for NullPointerException's constructor // + [CONSTANT_Methodref_info] for IllegalArgumentException's constructor // + [UTF-8] "(Ljava/lang/String;)V" // + [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/String;)V" // + [CONSTANT_Methodref_info] for IllegalArgumentException's constructor taking a String // + [UTF-8] "(Ljava/lang/Throwable;)V" // + [CONSTANT_NameAndType_info] for "<init>(Ljava/lang/Throwable;)V" // + [CONSTANT_Methodref_info] for InvocationTargetException's constructor // + [CONSTANT_Methodref_info] for "super()" // + [UTF-8] "java/lang/Object" // + [CONSTANT_Class_info] for above // + [UTF-8] "toString" // + [UTF-8] "()Ljava/lang/String;" // + [CONSTANT_NameAndType_info] for "toString()Ljava/lang/String;" // + [CONSTANT_Methodref_info] for Object's toString method // + [UTF-8] "Code" // + [UTF-8] "Exceptions" // * [UTF-8] "java/lang/Boolean" // * [CONSTANT_Class_info] for above // * [UTF-8] "(Z)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "booleanValue" // * [UTF-8] "()Z" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Byte" // * [CONSTANT_Class_info] for above // * [UTF-8] "(B)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "byteValue" // * [UTF-8] "()B" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Character" // * [CONSTANT_Class_info] for above // * [UTF-8] "(C)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "charValue" // * [UTF-8] "()C" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Double" // * [CONSTANT_Class_info] for above // * [UTF-8] "(D)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "doubleValue" // * [UTF-8] "()D" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Float" // * [CONSTANT_Class_info] for above // * [UTF-8] "(F)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "floatValue" // * [UTF-8] "()F" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Integer" // * [CONSTANT_Class_info] for above // * [UTF-8] "(I)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "intValue" // * [UTF-8] "()I" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Long" // * [CONSTANT_Class_info] for above // * [UTF-8] "(J)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "longValue" // * [UTF-8] "()J" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "java/lang/Short" // * [CONSTANT_Class_info] for above // * [UTF-8] "(S)V" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above // * [UTF-8] "shortValue" // * [UTF-8] "()S" // * [CONSTANT_NameAndType_info] for above // * [CONSTANT_Methodref_info] for above short numCPEntries = NUM_BASE_CPOOL_ENTRIES + NUM_COMMON_CPOOL_ENTRIES; boolean usesPrimitives = usesPrimitiveTypes(); if (usesPrimitives) { numCPEntries += NUM_BOXING_CPOOL_ENTRIES; } if (forSerialization) { numCPEntries += NUM_SERIALIZATION_CPOOL_ENTRIES; } // Add in variable-length number of entries to be able to describe // non-primitive parameter types and checked exceptions. numCPEntries += (short) (2 * numNonPrimitiveParameterTypes()); asm.emitShort(add(numCPEntries, S1)); final String generatedName = generateName(isConstructor, forSerialization); asm.emitConstantPoolUTF8(generatedName); asm.emitConstantPoolClass(asm.cpi()); thisClass = asm.cpi(); if (isConstructor) { if (forSerialization) { asm.emitConstantPoolUTF8 ("sun/reflect/SerializationConstructorAccessorImpl"); } else { asm.emitConstantPoolUTF8("sun/reflect/ConstructorAccessorImpl"); } } else { asm.emitConstantPoolUTF8("sun/reflect/MethodAccessorImpl"); } asm.emitConstantPoolClass(asm.cpi()); superClass = asm.cpi(); asm.emitConstantPoolUTF8(getClassName(declaringClass, false)); asm.emitConstantPoolClass(asm.cpi()); targetClass = asm.cpi(); short serializationTargetClassIdx = (short) 0; if (forSerialization) { asm.emitConstantPoolUTF8(getClassName(serializationTargetClass, false)); asm.emitConstantPoolClass(asm.cpi()); serializationTargetClassIdx = asm.cpi(); } asm.emitConstantPoolUTF8(name); asm.emitConstantPoolUTF8(buildInternalSignature()); asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi()); if (isInterface()) { asm.emitConstantPoolInterfaceMethodref(targetClass, asm.cpi()); } else { if (forSerialization) { asm.emitConstantPoolMethodref(serializationTargetClassIdx, asm.cpi()); } else { asm.emitConstantPoolMethodref(targetClass, asm.cpi()); } } targetMethodRef = asm.cpi(); if (isConstructor) { asm.emitConstantPoolUTF8("newInstance"); } else { asm.emitConstantPoolUTF8("invoke"); } invokeIdx = asm.cpi(); if (isConstructor) { asm.emitConstantPoolUTF8("([Ljava/lang/Object;)Ljava/lang/Object;"); } else { asm.emitConstantPoolUTF8 ("(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;"); } invokeDescriptorIdx = asm.cpi(); // Output class information for non-primitive parameter types nonPrimitiveParametersBaseIdx = add(asm.cpi(), S2); for (int i = 0; i < parameterTypes.length; i++) { Class c = parameterTypes[i]; if (!isPrimitive(c)) { asm.emitConstantPoolUTF8(getClassName(c, false)); asm.emitConstantPoolClass(asm.cpi()); } } // Entries common to FieldAccessor, MethodAccessor and ConstructorAccessor emitCommonConstantPoolEntries(); // Boxing entries if (usesPrimitives) { emitBoxingContantPoolEntries(); } if (asm.cpi() != numCPEntries) { throw new InternalError("Adjust this code (cpi = " + asm.cpi() + ", numCPEntries = " + numCPEntries + ")"); } // Access flags asm.emitShort(ACC_PUBLIC); // This class asm.emitShort(thisClass); // Superclass asm.emitShort(superClass); // Interfaces count and interfaces asm.emitShort(S0); // Fields count and fields asm.emitShort(S0); // Methods count and methods asm.emitShort(NUM_METHODS); emitConstructor(); emitInvoke(); // Additional attributes (none) asm.emitShort(S0); // Load class vec.trim(); final byte[] bytes = vec.getData(); // Note: the class loader is the only thing that really matters // here -- it's important to get the generated code into the // same namespace as the target class. Since the generated code // is privileged anyway, the protection domain probably doesn't // matter. return AccessController.doPrivileged( new PrivilegedAction<MagicAccessorImpl>() { public MagicAccessorImpl run() { try { return (MagicAccessorImpl) ClassDefiner.defineClass (generatedName, bytes, 0, bytes.length, declaringClass.getClassLoader()).newInstance(); } catch (InstantiationException e) { throw (InternalError) new InternalError().initCause(e); } catch (IllegalAccessException e) { throw (InternalError) new InternalError().initCause(e); } } }); } /** This emits the code for either invoke() or newInstance() */ private void emitInvoke() { // NOTE that this code will only handle 65535 parameters since we // use the sipush instruction to get the array index on the // operand stack. if (parameterTypes.length > 65535) { throw new InternalError("Can't handle more than 65535 parameters"); } // Generate code into fresh code buffer ClassFileAssembler cb = new ClassFileAssembler(); if (isConstructor) { // 1 incoming argument cb.setMaxLocals(2); } else { // 2 incoming arguments cb.setMaxLocals(3); } short illegalArgStartPC = 0; if (isConstructor) { // Instantiate target class before continuing // new <target class type> // dup cb.opc_new(targetClass); cb.opc_dup(); } else { // Setup before iterating down argument list if (isPrimitive(returnType)) { // new <boxing type for primitive type> // dup // ... (see below:) // invokespecial <constructor for boxing type for primitive type> // areturn cb.opc_new(indexForPrimitiveType(returnType)); cb.opc_dup(); } // Get target object on operand stack if necessary. // We need to do an explicit null check here; we won't see // NullPointerExceptions from the invoke bytecode, since it's // covered by an exception handler. if (!isStatic()) { // aload_1 // ifnonnull <checkcast label> // new <NullPointerException> // dup // invokespecial <NullPointerException ctor> // athrow // <checkcast label:> // aload_1 // checkcast <target class's type> cb.opc_aload_1(); Label l = new Label(); cb.opc_ifnonnull(l); cb.opc_new(nullPointerClass); cb.opc_dup(); cb.opc_invokespecial(nullPointerCtorIdx, 0, 0); cb.opc_athrow(); l.bind(); illegalArgStartPC = cb.getLength(); cb.opc_aload_1(); cb.opc_checkcast(targetClass); } } // Have to check length of incoming array and throw // IllegalArgumentException if not correct. A concession to the // JCK (isn't clearly specified in the spec): we allow null in the // case where the argument list is zero length. // if no-arg: // aload_2 | aload_1 (Method | Constructor) // ifnull <success label> // aload_2 | aload_1 // arraylength // sipush <num parameter types> // if_icmpeq <success label> // new <IllegalArgumentException> // dup // invokespecial <IllegalArgumentException ctor> // athrow // <success label:>