/*
* Copyright (c) 2001, 2013, 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 jdk.internal.reflect;
import java.lang.reflect.*;
import jdk.internal.misc.Unsafe;
/** Shared functionality for all accessor generators */
class AccessorGenerator implements ClassFileConstants {
static final Unsafe unsafe = Unsafe.getUnsafe();
// Constants because there's no way to say "short integer constant",
// i.e., "1S"
protected static final short S0 = (short) 0;
protected static final short S1 = (short) 1;
protected static final short S2 = (short) 2;
protected static final short S3 = (short) 3;
protected static final short S4 = (short) 4;
protected static final short S5 = (short) 5;
protected static final short S6 = (short) 6;
// Instance variables for shared functionality between
// FieldAccessorGenerator and MethodAccessorGenerator
protected ClassFileAssembler asm;
protected int modifiers;
protected short thisClass;
protected short superClass;
protected short targetClass;
// Common constant pool entries to FieldAccessor and MethodAccessor
protected short throwableClass;
protected short classCastClass;
protected short nullPointerClass;
protected short illegalArgumentClass;
protected short invocationTargetClass;
protected short initIdx;
protected short initNameAndTypeIdx;
protected short initStringNameAndTypeIdx;
protected short nullPointerCtorIdx;
protected short illegalArgumentCtorIdx;
protected short illegalArgumentStringCtorIdx;
protected short invocationTargetCtorIdx;
protected short superCtorIdx;
protected short objectClass;
protected short toStringIdx;
protected short codeIdx;
protected short exceptionsIdx;
// Boxing
protected short valueOfIdx;
protected short booleanIdx;
protected short booleanBoxIdx;
protected short booleanUnboxIdx;
protected short byteIdx;
protected short byteBoxIdx;
protected short byteUnboxIdx;
protected short characterIdx;
protected short characterBoxIdx;
protected short characterUnboxIdx;
protected short doubleIdx;
protected short doubleBoxIdx;
protected short doubleUnboxIdx;
protected short floatIdx;
protected short floatBoxIdx;
protected short floatUnboxIdx;
protected short integerIdx;
protected short integerBoxIdx;
protected short integerUnboxIdx;
protected short longIdx;
protected short longBoxIdx;
protected short longUnboxIdx;
protected short shortIdx;
protected short shortBoxIdx;
protected short shortUnboxIdx;
protected final short NUM_COMMON_CPOOL_ENTRIES = (short) 30;
protected final short NUM_BOXING_CPOOL_ENTRIES = (short) 73;
// Requires that superClass has been set up
protected void emitCommonConstantPoolEntries() {
// + [UTF-8] "java/lang/Throwable"
// + [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"
asm.emitConstantPoolUTF8("java/lang/Throwable");
asm.emitConstantPoolClass(asm.cpi());
throwableClass = asm.cpi();
asm.emitConstantPoolUTF8("java/lang/ClassCastException");
asm.emitConstantPoolClass(asm.cpi());
classCastClass = asm.cpi();
asm.emitConstantPoolUTF8("java/lang/NullPointerException");
asm.emitConstantPoolClass(asm.cpi());
nullPointerClass = asm.cpi();
asm.emitConstantPoolUTF8("java/lang/IllegalArgumentException");
asm.emitConstantPoolClass(asm.cpi());
illegalArgumentClass = asm.cpi();
asm.emitConstantPoolUTF8("java/lang/reflect/InvocationTargetException");
asm.emitConstantPoolClass(asm.cpi());
invocationTargetClass = asm.cpi();
asm.emitConstantPoolUTF8("<init>");
initIdx = asm.cpi();
asm.emitConstantPoolUTF8("()V");
asm.emitConstantPoolNameAndType(initIdx, asm.cpi());
initNameAndTypeIdx = asm.cpi();
asm.emitConstantPoolMethodref(nullPointerClass, initNameAndTypeIdx);
nullPointerCtorIdx = asm.cpi();
asm.emitConstantPoolMethodref(illegalArgumentClass, initNameAndTypeIdx);
illegalArgumentCtorIdx = asm.cpi();
asm.emitConstantPoolUTF8("(Ljava/lang/String;)V");
asm.emitConstantPoolNameAndType(initIdx, asm.cpi());
initStringNameAndTypeIdx = asm.cpi();
asm.emitConstantPoolMethodref(illegalArgumentClass, initStringNameAndTypeIdx);
illegalArgumentStringCtorIdx = asm.cpi();
asm.emitConstantPoolUTF8("(Ljava/lang/Throwable;)V");
asm.emitConstantPoolNameAndType(initIdx, asm.cpi());
asm.emitConstantPoolMethodref(invocationTargetClass, asm.cpi());
invocationTargetCtorIdx = asm.cpi();
asm.emitConstantPoolMethodref(superClass, initNameAndTypeIdx);
superCtorIdx = asm.cpi();
asm.emitConstantPoolUTF8("java/lang/Object");
asm.emitConstantPoolClass(asm.cpi());
objectClass = asm.cpi();
asm.emitConstantPoolUTF8("toString");
asm.emitConstantPoolUTF8("()Ljava/lang/String;");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(objectClass, asm.cpi());
toStringIdx = asm.cpi();
asm.emitConstantPoolUTF8("Code");
codeIdx = asm.cpi();
asm.emitConstantPoolUTF8("Exceptions");
exceptionsIdx = asm.cpi();
}
/** Constant pool entries required to be able to box/unbox primitive
types. Note that we don't emit these if we don't need them. */
protected void emitBoxingContantPoolEntries() {
// * [UTF-8] "valueOf"
// * [UTF-8] "java/lang/Boolean"
// * [CONSTANT_Class_info] for above
// * [UTF-8] "(Z)Ljava/lang/Boolean;"
// * [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)Ljava/lang/Byte;"
// * [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)Ljava/lang/Character;"
// * [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)Ljava/lang/Double;"
// * [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)Ljava/lang/Float;"
// * [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)Ljava/lang/Integer;"
// * [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)Ljava/lang/Long;"
// * [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)Ljava/lang/Short;"
// * [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
// valueOf-method name
asm.emitConstantPoolUTF8("valueOf");
valueOfIdx = asm.cpi();
// Boolean
asm.emitConstantPoolUTF8("java/lang/Boolean");
asm.emitConstantPoolClass(asm.cpi());
booleanIdx = asm.cpi();
asm.emitConstantPoolUTF8("(Z)Ljava/lang/Boolean;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
booleanBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("booleanValue");
asm.emitConstantPoolUTF8("()Z");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
booleanUnboxIdx = asm.cpi();
// Byte
asm.emitConstantPoolUTF8("java/lang/Byte");
asm.emitConstantPoolClass(asm.cpi());
byteIdx = asm.cpi();
asm.emitConstantPoolUTF8("(B)Ljava/lang/Byte;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
byteBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("byteValue");
asm.emitConstantPoolUTF8("()B");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
byteUnboxIdx = asm.cpi();
// Character
asm.emitConstantPoolUTF8("java/lang/Character");
asm.emitConstantPoolClass(asm.cpi());
characterIdx = asm.cpi();
asm.emitConstantPoolUTF8("(C)Ljava/lang/Character;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
characterBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("charValue");
asm.emitConstantPoolUTF8("()C");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
characterUnboxIdx = asm.cpi();
// Double
asm.emitConstantPoolUTF8("java/lang/Double");
asm.emitConstantPoolClass(asm.cpi());
doubleIdx = asm.cpi();
asm.emitConstantPoolUTF8("(D)Ljava/lang/Double;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
doubleBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("doubleValue");
asm.emitConstantPoolUTF8("()D");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
doubleUnboxIdx = asm.cpi();
// Float
asm.emitConstantPoolUTF8("java/lang/Float");
asm.emitConstantPoolClass(asm.cpi());
floatIdx = asm.cpi();
asm.emitConstantPoolUTF8("(F)Ljava/lang/Float;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
floatBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("floatValue");
asm.emitConstantPoolUTF8("()F");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
floatUnboxIdx = asm.cpi();
// Integer
asm.emitConstantPoolUTF8("java/lang/Integer");
asm.emitConstantPoolClass(asm.cpi());
integerIdx = asm.cpi();
asm.emitConstantPoolUTF8("(I)Ljava/lang/Integer;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
integerBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("intValue");
asm.emitConstantPoolUTF8("()I");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
integerUnboxIdx = asm.cpi();
// Long
asm.emitConstantPoolUTF8("java/lang/Long");
asm.emitConstantPoolClass(asm.cpi());
longIdx = asm.cpi();
asm.emitConstantPoolUTF8("(J)Ljava/lang/Long;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
longBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("longValue");
asm.emitConstantPoolUTF8("()J");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
longUnboxIdx = asm.cpi();
// Short
asm.emitConstantPoolUTF8("java/lang/Short");
asm.emitConstantPoolClass(asm.cpi());
shortIdx = asm.cpi();
asm.emitConstantPoolUTF8("(S)Ljava/lang/Short;");
asm.emitConstantPoolNameAndType(valueOfIdx, asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S2), asm.cpi());
shortBoxIdx = asm.cpi();
asm.emitConstantPoolUTF8("shortValue");
asm.emitConstantPoolUTF8("()S");
asm.emitConstantPoolNameAndType(sub(asm.cpi(), S1), asm.cpi());
asm.emitConstantPoolMethodref(sub(asm.cpi(), S6), asm.cpi());
shortUnboxIdx = asm.cpi();
}
// Necessary because of Java's annoying promotion rules
protected static short add(short s1, short s2) {
return (short) (s1 + s2);
}
protected static short sub(short s1, short s2) {
return (short) (s1 - s2);
}
protected boolean isStatic() {
return Modifier.isStatic(modifiers);
}
protected boolean isPrivate() {
return Modifier.isPrivate(modifiers);
}
/** Returns class name in "internal" form (i.e., '/' separators
instead of '.') */
protected static String getClassName
(Class<?> c, boolean addPrefixAndSuffixForNonPrimitiveTypes)
{
if (c.isPrimitive()) {
if (c == Boolean.TYPE) {
return "Z";
} else if (c == Byte.TYPE) {
return "B";
} else if (c == Character.TYPE) {
return "C";
} else if (c == Double.TYPE) {
return "D";
} else if (c == Float.TYPE) {
return "F";
} else if (c == Integer.TYPE) {
return "I";
} else if (c == Long.TYPE) {
return "J";
} else if (c == Short.TYPE) {
return "S";
} else if (c == Void.TYPE) {
return "V";
}
throw new InternalError("Should have found primitive type");
} else if (c.isArray()) {
return "[" + getClassName(c.getComponentType(), true);
} else {
if (addPrefixAndSuffixForNonPrimitiveTypes) {
return internalize("L" + c.getName() + ";");
} else {
return internalize(c.getName());
}
}
}
private static String internalize(String className) {
return className.replace('.', '/');
}
protected void emitConstructor() {
// Generate code into fresh code buffer
ClassFileAssembler cb = new ClassFileAssembler();
// 0 incoming arguments
cb.setMaxLocals(1);
cb.opc_aload_0();
cb.opc_invokespecial(superCtorIdx, 0, 0);
cb.opc_return();
// Emit method
emitMethod(initIdx, cb.getMaxLocals(), cb, null, null);
}
// The descriptor's index in the constant pool must be (1 +
// nameIdx). "numArgs" must indicate ALL arguments, including the
// implicit "this" argument; double and long arguments each count
// as 2 in this count. The code buffer must NOT contain the code
// length. The exception table may be null, but if non-null must
// NOT contain the exception table's length. The checked exception
// indices may be null.
protected void emitMethod(short nameIdx,
int numArgs,
ClassFileAssembler code,
ClassFileAssembler exceptionTable,
short[] checkedExceptionIndices)
{
int codeLen = code.getLength();
int excLen = 0;
if (exceptionTable != null) {
excLen = exceptionTable.getLength();
if ((excLen % 8) != 0) {
throw new IllegalArgumentException("Illegal exception table");
}
}
int attrLen = 12 + codeLen + excLen;
excLen = excLen / 8; // No-op if no exception table
asm.emitShort(ACC_PUBLIC);
asm.emitShort(nameIdx);
asm.emitShort(add(nameIdx, S1));
if (checkedExceptionIndices == null) {
// Code attribute only
asm.emitShort(S1);
} else {
// Code and Exceptions attributes
asm.emitShort(S2);
}
// Code attribute
asm.emitShort(codeIdx);
asm.emitInt(attrLen);
asm.emitShort(code.getMaxStack());
asm.emitShort((short) Math.max(numArgs, code.getMaxLocals()));
asm.emitInt(codeLen);
asm.append(code);
asm.emitShort((short) excLen);
if (exceptionTable != null) {
asm.append(exceptionTable);
}
asm.emitShort(S0); // No additional attributes for Code attribute
if (checkedExceptionIndices != null) {
// Exceptions attribute
asm.emitShort(exceptionsIdx);
asm.emitInt(2 + 2 * checkedExceptionIndices.length);
asm.emitShort((short) checkedExceptionIndices.length);
for (int i = 0; i < checkedExceptionIndices.length; i++) {
asm.emitShort(checkedExceptionIndices[i]);
}
}
}
protected short indexForPrimitiveType(Class<?> type) {
if (type == Boolean.TYPE) {
return booleanIdx;
} else if (type == Byte.TYPE) {
return byteIdx;
} else if (type == Character.TYPE) {
return characterIdx;
} else if (type == Double.TYPE) {
return doubleIdx;
} else if (type == Float.TYPE) {
return floatIdx;
} else if (type == Integer.TYPE) {
return integerIdx;
} else if (type == Long.TYPE) {
return longIdx;
} else if (type == Short.TYPE) {
return shortIdx;
}
throw new InternalError("Should have found primitive type");
}
protected short boxingMethodForPrimitiveType(Class<?> type) {
if (type == Boolean.TYPE) {
return booleanBoxIdx;
} else if (type == Byte.TYPE) {
return byteBoxIdx;
} else if (type == Character.TYPE) {
return characterBoxIdx;
} else if (type == Double.TYPE) {
return doubleBoxIdx;
} else if (type == Float.TYPE) {
return floatBoxIdx;
} else if (type == Integer.TYPE) {
return integerBoxIdx;
} else if (type == Long.TYPE) {
return longBoxIdx;
} else if (type == Short.TYPE) {
return shortBoxIdx;
}
throw new InternalError("Should have found primitive type");
}
/** Returns true for widening or identity conversions for primitive
types only */
protected static boolean canWidenTo(Class<?> type, Class<?> otherType) {
if (!type.isPrimitive()) {
return false;
}
// Widening conversions (from JVM spec):
// byte to short, int, long, float, or double
// short to int, long, float, or double
// char to int, long, float, or double
// int to long, float, or double
// long to float or double
// float to double
if (type == Boolean.TYPE) {
if (otherType == Boolean.TYPE) {
return true;
}
} else if (type == Byte.TYPE) {
if ( otherType == Byte.TYPE
|| otherType == Short.TYPE
|| otherType == Integer.TYPE
|| otherType == Long.TYPE
|| otherType == Float.TYPE
|| otherType == Double.TYPE) {
return true;
}
} else if (type == Short.TYPE) {
if ( otherType == Short.TYPE
|| otherType == Integer.TYPE
|| otherType == Long.TYPE
|| otherType == Float.TYPE
|| otherType == Double.TYPE) {
return true;
}
} else if (type == Character.TYPE) {
if ( otherType == Character.TYPE
|| otherType == Integer.TYPE
|| otherType == Long.TYPE
|| otherType == Float.TYPE
|| otherType == Double.TYPE) {
return true;
}
} else if (type == Integer.TYPE) {
if ( otherType == Integer.TYPE
|| otherType == Long.TYPE
|| otherType == Float.TYPE
|| otherType == Double.TYPE) {
return true;
}
} else if (type == Long.TYPE) {
if ( otherType == Long.TYPE
|| otherType == Float.TYPE
|| otherType == Double.TYPE) {
return true;
}
} else if (type == Float.TYPE) {
if ( otherType == Float.TYPE
|| otherType == Double.TYPE) {
return true;
}
} else if (type == Double.TYPE) {
if (otherType == Double.TYPE) {
return true;
}
}
return false;
}
/** Emits the widening bytecode for the given primitive conversion
(or none if the identity conversion). Requires that a primitive
conversion exists; i.e., canWidenTo must have already been
called and returned true. */
protected static void emitWideningBytecodeForPrimitiveConversion
(ClassFileAssembler cb,
Class<?> fromType,
Class<?> toType)
{
// Note that widening conversions for integral types (i.e., "b2s",
// "s2i") are no-ops since values on the Java stack are
// sign-extended.
// Widening conversions (from JVM spec):
// byte to short, int, long, float, or double
// short to int, long, float, or double
// char to int, long, float, or double
// int to long, float, or double
// long to float or double
// float to double
if ( fromType == Byte.TYPE
|| fromType == Short.TYPE
|| fromType == Character.TYPE
|| fromType == Integer.TYPE) {
if (toType == Long.TYPE) {
cb.opc_i2l();
} else if (toType == Float.TYPE) {
cb.opc_i2f();
} else if (toType == Double.TYPE) {
cb.opc_i2d();
}
} else if (fromType == Long.TYPE) {
if (toType == Float.TYPE) {
cb.opc_l2f();
} else if (toType == Double.TYPE) {
cb.opc_l2d();
}
} else if (fromType == Float.TYPE) {
if (toType == Double.TYPE) {
cb.opc_f2d();
}
}
// Otherwise, was identity or no-op conversion. Fall through.
}
protected short unboxingMethodForPrimitiveType(Class<?> primType) {
if (primType == Boolean.TYPE) {
return booleanUnboxIdx;
} else if (primType == Byte.TYPE) {
return byteUnboxIdx;
} else if (primType == Character.TYPE) {
return characterUnboxIdx;
} else if (primType == Short.TYPE) {
return shortUnboxIdx;
} else if (primType == Integer.TYPE) {
return integerUnboxIdx;
} else if (primType == Long.TYPE) {
return longUnboxIdx;
} else if (primType == Float.TYPE) {
return floatUnboxIdx;
} else if (primType == Double.TYPE) {
return doubleUnboxIdx;
}
throw new InternalError("Illegal primitive type " + primType.getName());
}
protected static final Class<?>[] primitiveTypes = new Class<?>[] {
Boolean.TYPE,
Byte.TYPE,
Character.TYPE,
Short.TYPE,
Integer.TYPE,
Long.TYPE,
Float.TYPE,
Double.TYPE
};
/** We don't consider "Void" to be a primitive type */
protected static boolean isPrimitive(Class<?> c) {
return (c.isPrimitive() && c != Void.TYPE);
}
protected int typeSizeInStackSlots(Class<?> c) {
if (c == Void.TYPE) {
return 0;
}
if (c == Long.TYPE || c == Double.TYPE) {
return 2;
}
return 1;
}
private ClassFileAssembler illegalArgumentCodeBuffer;
protected ClassFileAssembler illegalArgumentCodeBuffer() {
if (illegalArgumentCodeBuffer == null) {
illegalArgumentCodeBuffer = new ClassFileAssembler();
illegalArgumentCodeBuffer.opc_new(illegalArgumentClass);
illegalArgumentCodeBuffer.opc_dup();
illegalArgumentCodeBuffer.opc_invokespecial(illegalArgumentCtorIdx, 0, 0);
illegalArgumentCodeBuffer.opc_athrow();
}
return illegalArgumentCodeBuffer;
}
}