author | lana |
Thu, 25 Oct 2012 20:32:10 -0700 | |
changeset 14230 | 40cfabf65fc7 |
parent 14089 | 0a41b980d62a |
parent 14222 | 58f55d4dde46 |
child 14852 | d513c47448f4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.lang.invoke; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.HashMap; |
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import sun.invoke.empty.Empty; |
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import sun.invoke.util.ValueConversions; |
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import sun.invoke.util.VerifyType; |
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import sun.invoke.util.Wrapper; |
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import static java.lang.invoke.LambdaForm.*; |
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import static java.lang.invoke.MethodHandleStatics.*; |
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import static java.lang.invoke.MethodHandles.Lookup.IMPL_LOOKUP; |
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/** |
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* Trusted implementation code for MethodHandle. |
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* @author jrose |
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*/ |
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/*non-public*/ abstract class MethodHandleImpl { |
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/// Factory methods to create method handles: |
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static void initStatics() { |
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// Trigger selected static initializations. |
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MemberName.Factory.INSTANCE.getClass(); |
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} |
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static MethodHandle makeArrayElementAccessor(Class<?> arrayClass, boolean isSetter) { |
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if (!arrayClass.isArray()) |
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throw newIllegalArgumentException("not an array: "+arrayClass); |
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MethodHandle accessor = ArrayAccessor.getAccessor(arrayClass, isSetter); |
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MethodType srcType = accessor.type().erase(); |
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MethodType lambdaType = srcType.invokerType(); |
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Name[] names = arguments(1, lambdaType); |
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Name[] args = Arrays.copyOfRange(names, 1, 1 + srcType.parameterCount()); |
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names[names.length - 1] = new Name(accessor.asType(srcType), (Object[]) args); |
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LambdaForm form = new LambdaForm("getElement", lambdaType.parameterCount(), names); |
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MethodHandle mh = SimpleMethodHandle.make(srcType, form); |
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if (ArrayAccessor.needCast(arrayClass)) { |
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mh = mh.bindTo(arrayClass); |
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} |
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mh = mh.asType(ArrayAccessor.correctType(arrayClass, isSetter)); |
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return mh; |
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} |
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static final class ArrayAccessor { |
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/// Support for array element access |
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static final HashMap<Class<?>, MethodHandle> GETTER_CACHE = new HashMap<>(); // TODO use it |
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static final HashMap<Class<?>, MethodHandle> SETTER_CACHE = new HashMap<>(); // TODO use it |
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static int getElementI(int[] a, int i) { return a[i]; } |
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static long getElementJ(long[] a, int i) { return a[i]; } |
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static float getElementF(float[] a, int i) { return a[i]; } |
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static double getElementD(double[] a, int i) { return a[i]; } |
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static boolean getElementZ(boolean[] a, int i) { return a[i]; } |
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static byte getElementB(byte[] a, int i) { return a[i]; } |
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static short getElementS(short[] a, int i) { return a[i]; } |
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static char getElementC(char[] a, int i) { return a[i]; } |
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static Object getElementL(Object[] a, int i) { return a[i]; } |
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static void setElementI(int[] a, int i, int x) { a[i] = x; } |
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static void setElementJ(long[] a, int i, long x) { a[i] = x; } |
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static void setElementF(float[] a, int i, float x) { a[i] = x; } |
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static void setElementD(double[] a, int i, double x) { a[i] = x; } |
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static void setElementZ(boolean[] a, int i, boolean x) { a[i] = x; } |
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static void setElementB(byte[] a, int i, byte x) { a[i] = x; } |
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static void setElementS(short[] a, int i, short x) { a[i] = x; } |
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static void setElementC(char[] a, int i, char x) { a[i] = x; } |
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static void setElementL(Object[] a, int i, Object x) { a[i] = x; } |
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static Object getElementL(Class<?> arrayClass, Object[] a, int i) { arrayClass.cast(a); return a[i]; } |
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static void setElementL(Class<?> arrayClass, Object[] a, int i, Object x) { arrayClass.cast(a); a[i] = x; } |
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// Weakly typed wrappers of Object[] accessors: |
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static Object getElementL(Object a, int i) { return getElementL((Object[])a, i); } |
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static void setElementL(Object a, int i, Object x) { setElementL((Object[]) a, i, x); } |
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static Object getElementL(Object arrayClass, Object a, int i) { return getElementL((Class<?>) arrayClass, (Object[])a, i); } |
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static void setElementL(Object arrayClass, Object a, int i, Object x) { setElementL((Class<?>) arrayClass, (Object[])a, i, x); } |
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static boolean needCast(Class<?> arrayClass) { |
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Class<?> elemClass = arrayClass.getComponentType(); |
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return !elemClass.isPrimitive() && elemClass != Object.class; |
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} |
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static String name(Class<?> arrayClass, boolean isSetter) { |
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Class<?> elemClass = arrayClass.getComponentType(); |
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if (elemClass == null) throw new IllegalArgumentException(); |
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return (!isSetter ? "getElement" : "setElement") + Wrapper.basicTypeChar(elemClass); |
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} |
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static final boolean USE_WEAKLY_TYPED_ARRAY_ACCESSORS = false; // FIXME: decide |
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static MethodType type(Class<?> arrayClass, boolean isSetter) { |
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Class<?> elemClass = arrayClass.getComponentType(); |
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Class<?> arrayArgClass = arrayClass; |
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if (!elemClass.isPrimitive()) { |
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arrayArgClass = Object[].class; |
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if (USE_WEAKLY_TYPED_ARRAY_ACCESSORS) |
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arrayArgClass = Object.class; |
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} |
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if (!needCast(arrayClass)) { |
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return !isSetter ? |
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MethodType.methodType(elemClass, arrayArgClass, int.class) : |
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MethodType.methodType(void.class, arrayArgClass, int.class, elemClass); |
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} else { |
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128 |
Class<?> classArgClass = Class.class; |
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129 |
if (USE_WEAKLY_TYPED_ARRAY_ACCESSORS) |
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classArgClass = Object.class; |
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131 |
return !isSetter ? |
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132 |
MethodType.methodType(Object.class, classArgClass, arrayArgClass, int.class) : |
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133 |
MethodType.methodType(void.class, classArgClass, arrayArgClass, int.class, Object.class); |
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134 |
} |
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135 |
} |
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136 |
static MethodType correctType(Class<?> arrayClass, boolean isSetter) { |
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137 |
Class<?> elemClass = arrayClass.getComponentType(); |
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138 |
return !isSetter ? |
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139 |
MethodType.methodType(elemClass, arrayClass, int.class) : |
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140 |
MethodType.methodType(void.class, arrayClass, int.class, elemClass); |
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141 |
} |
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142 |
static MethodHandle getAccessor(Class<?> arrayClass, boolean isSetter) { |
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143 |
String name = name(arrayClass, isSetter); |
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144 |
MethodType type = type(arrayClass, isSetter); |
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145 |
try { |
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146 |
return IMPL_LOOKUP.findStatic(ArrayAccessor.class, name, type); |
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147 |
} catch (ReflectiveOperationException ex) { |
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148 |
throw uncaughtException(ex); |
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149 |
} |
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150 |
} |
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151 |
} |
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152 |
|
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153 |
/** |
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154 |
* Create a JVM-level adapter method handle to conform the given method |
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155 |
* handle to the similar newType, using only pairwise argument conversions. |
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156 |
* For each argument, convert incoming argument to the exact type needed. |
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157 |
* The argument conversions allowed are casting, boxing and unboxing, |
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158 |
* integral widening or narrowing, and floating point widening or narrowing. |
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159 |
* @param srcType required call type |
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160 |
* @param target original method handle |
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161 |
* @param level which strength of conversion is allowed |
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162 |
* @return an adapter to the original handle with the desired new type, |
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163 |
* or the original target if the types are already identical |
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164 |
* or null if the adaptation cannot be made |
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165 |
*/ |
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166 |
static MethodHandle makePairwiseConvert(MethodHandle target, MethodType srcType, int level) { |
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167 |
assert(level >= 0 && level <= 2); |
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168 |
MethodType dstType = target.type(); |
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169 |
assert(dstType.parameterCount() == target.type().parameterCount()); |
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170 |
if (srcType == dstType) |
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171 |
return target; |
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|
172 |
|
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173 |
// Calculate extra arguments (temporaries) required in the names array. |
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174 |
// FIXME: Use an ArrayList<Name>. Some arguments require more than one conversion step. |
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175 |
final int INARG_COUNT = srcType.parameterCount(); |
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176 |
int conversions = 0; |
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177 |
boolean[] needConv = new boolean[1+INARG_COUNT]; |
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178 |
for (int i = 0; i <= INARG_COUNT; i++) { |
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|
179 |
Class<?> src = (i == INARG_COUNT) ? dstType.returnType() : srcType.parameterType(i); |
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180 |
Class<?> dst = (i == INARG_COUNT) ? srcType.returnType() : dstType.parameterType(i); |
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181 |
if (!VerifyType.isNullConversion(src, dst) || |
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182 |
level <= 1 && dst.isInterface() && !dst.isAssignableFrom(src)) { |
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|
183 |
needConv[i] = true; |
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|
184 |
conversions++; |
4537 | 185 |
} |
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|
186 |
} |
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187 |
boolean retConv = needConv[INARG_COUNT]; |
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188 |
|
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|
189 |
final int IN_MH = 0; |
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190 |
final int INARG_BASE = 1; |
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191 |
final int INARG_LIMIT = INARG_BASE + INARG_COUNT; |
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192 |
final int NAME_LIMIT = INARG_LIMIT + conversions + 1; |
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193 |
final int RETURN_CONV = (!retConv ? -1 : NAME_LIMIT - 1); |
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|
194 |
final int OUT_CALL = (!retConv ? NAME_LIMIT : RETURN_CONV) - 1; |
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195 |
|
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|
196 |
// Now build a LambdaForm. |
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197 |
MethodType lambdaType = srcType.basicType().invokerType(); |
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|
198 |
Name[] names = arguments(NAME_LIMIT - INARG_LIMIT, lambdaType); |
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|
199 |
|
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|
200 |
// Collect the arguments to the outgoing call, maybe with conversions: |
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|
201 |
final int OUTARG_BASE = 0; // target MH is Name.function, name Name.arguments[0] |
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|
202 |
Object[] outArgs = new Object[OUTARG_BASE + INARG_COUNT]; |
13423
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|
203 |
|
13610
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|
204 |
int nameCursor = INARG_LIMIT; |
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|
205 |
for (int i = 0; i < INARG_COUNT; i++) { |
13423
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|
206 |
Class<?> src = srcType.parameterType(i); |
13610
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|
207 |
Class<?> dst = dstType.parameterType(i); |
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|
208 |
|
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|
209 |
if (!needConv[i]) { |
13423
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|
210 |
// do nothing: difference is trivial |
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|
211 |
outArgs[OUTARG_BASE + i] = names[INARG_BASE + i]; |
13423
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|
212 |
continue; |
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|
213 |
} |
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|
214 |
|
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|
215 |
// Tricky case analysis follows. |
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|
216 |
MethodHandle fn = null; |
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|
217 |
if (src.isPrimitive()) { |
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|
218 |
if (dst.isPrimitive()) { |
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|
219 |
fn = ValueConversions.convertPrimitive(src, dst); |
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|
220 |
} else { |
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|
221 |
Wrapper w = Wrapper.forPrimitiveType(src); |
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|
222 |
MethodHandle boxMethod = ValueConversions.box(w); |
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|
223 |
if (dst == w.wrapperType()) |
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|
224 |
fn = boxMethod; |
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|
225 |
else |
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|
226 |
fn = boxMethod.asType(MethodType.methodType(dst, src)); |
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|
227 |
} |
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|
228 |
} else { |
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|
229 |
if (dst.isPrimitive()) { |
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|
230 |
// Caller has boxed a primitive. Unbox it for the target. |
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|
231 |
Wrapper w = Wrapper.forPrimitiveType(dst); |
17843fff200d
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|
232 |
if (level == 0 || VerifyType.isNullConversion(src, w.wrapperType())) { |
17843fff200d
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|
233 |
fn = ValueConversions.unbox(dst); |
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|
234 |
} else if (src == Object.class || !Wrapper.isWrapperType(src)) { |
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|
235 |
// Examples: Object->int, Number->int, Comparable->int; Byte->int, Character->int |
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|
236 |
// must include additional conversions |
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|
237 |
// src must be examined at runtime, to detect Byte, Character, etc. |
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|
238 |
MethodHandle unboxMethod = (level == 1 |
17843fff200d
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|
239 |
? ValueConversions.unbox(dst) |
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|
240 |
: ValueConversions.unboxCast(dst)); |
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|
241 |
fn = unboxMethod; |
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|
242 |
} else { |
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|
243 |
// Example: Byte->int |
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|
244 |
// Do this by reformulating the problem to Byte->byte. |
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|
245 |
Class<?> srcPrim = Wrapper.forWrapperType(src).primitiveType(); |
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|
246 |
MethodHandle unbox = ValueConversions.unbox(srcPrim); |
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|
247 |
// Compose the two conversions. FIXME: should make two Names for this job |
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|
248 |
fn = unbox.asType(MethodType.methodType(dst, src)); |
9780
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9752
diff
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|
249 |
} |
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250 |
} else { |
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251 |
// Simple reference conversion. |
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252 |
// Note: Do not check for a class hierarchy relation |
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253 |
// between src and dst. In all cases a 'null' argument |
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254 |
// will pass the cast conversion. |
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255 |
fn = ValueConversions.cast(dst); |
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256 |
} |
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|
257 |
} |
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258 |
Name conv = new Name(fn, names[INARG_BASE + i]); |
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259 |
assert(names[nameCursor] == null); |
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260 |
names[nameCursor++] = conv; |
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|
261 |
assert(outArgs[OUTARG_BASE + i] == null); |
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262 |
outArgs[OUTARG_BASE + i] = conv; |
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|
263 |
} |
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|
264 |
|
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|
265 |
// Build argument array for the call. |
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266 |
assert(nameCursor == OUT_CALL); |
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|
267 |
names[OUT_CALL] = new Name(target, outArgs); |
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|
268 |
|
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|
269 |
if (RETURN_CONV < 0) { |
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|
270 |
assert(OUT_CALL == names.length-1); |
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|
271 |
} else { |
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272 |
Class<?> needReturn = srcType.returnType(); |
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|
273 |
Class<?> haveReturn = dstType.returnType(); |
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|
274 |
MethodHandle fn; |
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|
275 |
Object[] arg = { names[OUT_CALL] }; |
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|
276 |
if (haveReturn == void.class) { |
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|
277 |
// synthesize a zero value for the given void |
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|
278 |
Object zero = Wrapper.forBasicType(needReturn).zero(); |
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279 |
fn = MethodHandles.constant(needReturn, zero); |
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280 |
arg = new Object[0]; // don't pass names[OUT_CALL] to conversion |
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|
281 |
} else { |
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|
282 |
MethodHandle identity = MethodHandles.identity(needReturn); |
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|
283 |
MethodType needConversion = identity.type().changeParameterType(0, haveReturn); |
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284 |
fn = makePairwiseConvert(identity, needConversion, level); |
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|
285 |
} |
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|
286 |
assert(names[RETURN_CONV] == null); |
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|
287 |
names[RETURN_CONV] = new Name(fn, arg); |
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|
288 |
assert(RETURN_CONV == names.length-1); |
4537 | 289 |
} |
290 |
||
13423
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|
291 |
LambdaForm form = new LambdaForm("convert", lambdaType.parameterCount(), names); |
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|
292 |
return SimpleMethodHandle.make(srcType, form); |
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|
293 |
} |
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|
294 |
|
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|
295 |
static MethodHandle makeReferenceIdentity(Class<?> refType) { |
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|
296 |
MethodType lambdaType = MethodType.genericMethodType(1).invokerType(); |
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|
297 |
Name[] names = arguments(1, lambdaType); |
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|
298 |
names[names.length - 1] = new Name(ValueConversions.identity(), names[1]); |
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|
299 |
LambdaForm form = new LambdaForm("identity", lambdaType.parameterCount(), names); |
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|
300 |
return SimpleMethodHandle.make(MethodType.methodType(refType, refType), form); |
13423
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|
301 |
} |
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|
302 |
|
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|
303 |
static MethodHandle makeVarargsCollector(MethodHandle target, Class<?> arrayType) { |
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|
304 |
MethodType type = target.type(); |
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|
305 |
int last = type.parameterCount() - 1; |
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|
306 |
if (type.parameterType(last) != arrayType) |
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|
307 |
target = target.asType(type.changeParameterType(last, arrayType)); |
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|
308 |
target = target.asFixedArity(); // make sure this attribute is turned off |
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|
309 |
return new AsVarargsCollector(target, target.type(), arrayType); |
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|
310 |
} |
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|
311 |
|
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|
312 |
static class AsVarargsCollector extends MethodHandle { |
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|
313 |
MethodHandle target; |
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|
314 |
final Class<?> arrayType; |
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|
315 |
MethodHandle cache; |
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changeset
|
316 |
|
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|
317 |
AsVarargsCollector(MethodHandle target, MethodType type, Class<?> arrayType) { |
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|
318 |
super(type, reinvokerForm(type)); |
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|
319 |
this.target = target; |
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|
320 |
this.arrayType = arrayType; |
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|
321 |
this.cache = target.asCollector(arrayType, 0); |
4537 | 322 |
} |
13423
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|
323 |
|
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|
324 |
@Override MethodHandle reinvokerTarget() { return target; } |
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|
325 |
|
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|
326 |
@Override |
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|
327 |
public boolean isVarargsCollector() { |
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|
328 |
return true; |
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|
329 |
} |
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changeset
|
330 |
|
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|
331 |
@Override |
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|
332 |
public MethodHandle asFixedArity() { |
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|
333 |
return target; |
4537 | 334 |
} |
335 |
||
13423
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|
336 |
@Override |
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|
337 |
public MethodHandle asType(MethodType newType) { |
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|
338 |
MethodType type = this.type(); |
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|
339 |
int collectArg = type.parameterCount() - 1; |
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|
340 |
int newArity = newType.parameterCount(); |
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|
341 |
if (newArity == collectArg+1 && |
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|
342 |
type.parameterType(collectArg).isAssignableFrom(newType.parameterType(collectArg))) { |
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|
343 |
// if arity and trailing parameter are compatible, do normal thing |
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|
344 |
return asFixedArity().asType(newType); |
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|
345 |
} |
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|
346 |
// check cache |
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|
347 |
if (cache.type().parameterCount() == newArity) |
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|
348 |
return cache.asType(newType); |
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changeset
|
349 |
// build and cache a collector |
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|
350 |
int arrayLength = newArity - collectArg; |
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|
351 |
MethodHandle collector; |
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|
352 |
try { |
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|
353 |
collector = asFixedArity().asCollector(arrayType, arrayLength); |
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|
354 |
assert(collector.type().parameterCount() == newArity) : "newArity="+newArity+" but collector="+collector; |
13423
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|
355 |
} catch (IllegalArgumentException ex) { |
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|
356 |
throw new WrongMethodTypeException("cannot build collector", ex); |
13423
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|
357 |
} |
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|
358 |
cache = collector; |
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|
359 |
return collector.asType(newType); |
4537 | 360 |
} |
13423
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changeset
|
361 |
|
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|
362 |
@Override |
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changeset
|
363 |
MethodHandle setVarargs(MemberName member) { |
17843fff200d
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|
364 |
if (member.isVarargs()) return this; |
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changeset
|
365 |
return asFixedArity(); |
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changeset
|
366 |
} |
4537 | 367 |
|
13423
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|
368 |
@Override |
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|
369 |
MethodHandle viewAsType(MethodType newType) { |
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|
370 |
MethodHandle mh = super.viewAsType(newType); |
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changeset
|
371 |
// put back the varargs bit: |
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|
372 |
MethodType type = mh.type(); |
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changeset
|
373 |
int arity = type.parameterCount(); |
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|
374 |
return mh.asVarargsCollector(type.parameterType(arity-1)); |
4537 | 375 |
} |
13423
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changeset
|
376 |
|
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changeset
|
377 |
@Override |
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|
378 |
MemberName internalMemberName() { |
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changeset
|
379 |
return asFixedArity().internalMemberName(); |
4537 | 380 |
} |
13423
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|
381 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
382 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
383 |
@Override |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
384 |
MethodHandle bindArgument(int pos, char basicType, Object value) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
385 |
return asFixedArity().bindArgument(pos, basicType, value); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
386 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
13420
diff
changeset
|
387 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
388 |
@Override |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
389 |
MethodHandle bindReceiver(Object receiver) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
390 |
return asFixedArity().bindReceiver(receiver); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
391 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
392 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
393 |
@Override |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
394 |
MethodHandle dropArguments(MethodType srcType, int pos, int drops) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
395 |
return asFixedArity().dropArguments(srcType, pos, drops); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
396 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
397 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
398 |
@Override |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
399 |
MethodHandle permuteArguments(MethodType newType, int[] reorder) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
400 |
return asFixedArity().permuteArguments(newType, reorder); |
4537 | 401 |
} |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
402 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
403 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
404 |
/** Factory method: Spread selected argument. */ |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
405 |
static MethodHandle makeSpreadArguments(MethodHandle target, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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changeset
|
406 |
Class<?> spreadArgType, int spreadArgPos, int spreadArgCount) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
407 |
MethodType targetType = target.type(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
408 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
409 |
for (int i = 0; i < spreadArgCount; i++) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
410 |
Class<?> arg = VerifyType.spreadArgElementType(spreadArgType, i); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
411 |
if (arg == null) arg = Object.class; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
412 |
targetType = targetType.changeParameterType(spreadArgPos + i, arg); |
2764
2e45af54c0f9
6839839: access checking logic is wrong at three points in MethodHandles
jrose
parents:
2707
diff
changeset
|
413 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
13420
diff
changeset
|
414 |
target = target.asType(targetType); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
415 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
416 |
MethodType srcType = targetType |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
417 |
.replaceParameterTypes(spreadArgPos, spreadArgPos + spreadArgCount, spreadArgType); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
418 |
// Now build a LambdaForm. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
419 |
MethodType lambdaType = srcType.invokerType(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
420 |
Name[] names = arguments(spreadArgCount + 2, lambdaType); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
421 |
int nameCursor = lambdaType.parameterCount(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
422 |
int[] indexes = new int[targetType.parameterCount()]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
423 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
424 |
for (int i = 0, argIndex = 1; i < targetType.parameterCount() + 1; i++, argIndex++) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
13420
diff
changeset
|
425 |
Class<?> src = lambdaType.parameterType(i); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
426 |
if (i == spreadArgPos) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
427 |
// Spread the array. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
428 |
MethodHandle aload = MethodHandles.arrayElementGetter(spreadArgType); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
429 |
Name array = names[argIndex]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
430 |
names[nameCursor++] = new Name(NF_checkSpreadArgument, array, spreadArgCount); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
13420
diff
changeset
|
431 |
for (int j = 0; j < spreadArgCount; i++, j++) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
432 |
indexes[i] = nameCursor; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
433 |
names[nameCursor++] = new Name(aload, array, j); |
4537 | 434 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
435 |
} else if (i < indexes.length) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
436 |
indexes[i] = argIndex; |
4537 | 437 |
} |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
8822
diff
changeset
|
438 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
439 |
assert(nameCursor == names.length-1); // leave room for the final call |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
440 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
441 |
// Build argument array for the call. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
442 |
Name[] targetArgs = new Name[targetType.parameterCount()]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
443 |
for (int i = 0; i < targetType.parameterCount(); i++) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
444 |
int idx = indexes[i]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
445 |
targetArgs[i] = names[idx]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
446 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
447 |
names[names.length - 1] = new Name(target, (Object[]) targetArgs); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
448 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
449 |
LambdaForm form = new LambdaForm("spread", lambdaType.parameterCount(), names); |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
450 |
return SimpleMethodHandle.make(srcType, form); |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
451 |
} |
4537 | 452 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
453 |
static void checkSpreadArgument(Object av, int n) { |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
454 |
// FIXME: regression test for bug 7141637 erroneously expects an NPE, and other tests may expect IAE |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
455 |
// but the actual exception raised by an arity mismatch should be WMTE |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
456 |
final boolean RAISE_RANDOM_EXCEPTIONS = true; // FIXME: delete in JSR 292 M1 |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
457 |
if (av == null) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
458 |
if (n == 0) return; |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
459 |
int len; |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
460 |
if (RAISE_RANDOM_EXCEPTIONS) |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
461 |
len = ((Object[])av).length; // throw NPE; but delete this after tests are fixed |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
462 |
} else if (av instanceof Object[]) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
463 |
int len = ((Object[])av).length; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
464 |
if (len == n) return; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
465 |
} else { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
466 |
int len = java.lang.reflect.Array.getLength(av); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
467 |
if (len == n) return; |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
8822
diff
changeset
|
468 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
469 |
// fall through to error: |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
470 |
if (RAISE_RANDOM_EXCEPTIONS) |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
471 |
throw newIllegalArgumentException("Array is not of length "+n); |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
472 |
throw new WrongMethodTypeException("Array is not of length "+n); |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
473 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
474 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
475 |
private static final NamedFunction NF_checkSpreadArgument; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
476 |
static { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
477 |
try { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
478 |
NF_checkSpreadArgument = new NamedFunction(MethodHandleImpl.class |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
479 |
.getDeclaredMethod("checkSpreadArgument", Object.class, int.class)); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
480 |
NF_checkSpreadArgument.resolve(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
481 |
} catch (ReflectiveOperationException ex) { |
14089
0a41b980d62a
8000989: smaller code changes to make future JSR 292 backports easier
twisti
parents:
13610
diff
changeset
|
482 |
throw newInternalError(ex); |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
8822
diff
changeset
|
483 |
} |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
8822
diff
changeset
|
484 |
} |
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
8822
diff
changeset
|
485 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
486 |
/** Factory method: Collect or filter selected argument(s). */ |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
487 |
static MethodHandle makeCollectArguments(MethodHandle target, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
488 |
MethodHandle collector, int collectArgPos, boolean retainOriginalArgs) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
489 |
MethodType targetType = target.type(); // (a..., c, [b...])=>r |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
490 |
MethodType collectorType = collector.type(); // (b...)=>c |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
491 |
int collectArgCount = collectorType.parameterCount(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
492 |
Class<?> collectValType = collectorType.returnType(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
493 |
int collectValCount = (collectValType == void.class ? 0 : 1); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
494 |
MethodType srcType = targetType // (a..., [b...])=>r |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
495 |
.dropParameterTypes(collectArgPos, collectArgPos+collectValCount); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
496 |
if (!retainOriginalArgs) { // (a..., b...)=>r |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
497 |
srcType = srcType.insertParameterTypes(collectArgPos, collectorType.parameterList()); |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
8822
diff
changeset
|
498 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
499 |
// in arglist: [0: ...keep1 | cpos: collect... | cpos+cacount: keep2... ] |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
500 |
// out arglist: [0: ...keep1 | cpos: collectVal? | cpos+cvcount: keep2... ] |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
501 |
// out(retain): [0: ...keep1 | cpos: cV? coll... | cpos+cvc+cac: keep2... ] |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
8822
diff
changeset
|
502 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
503 |
// Now build a LambdaForm. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
504 |
MethodType lambdaType = srcType.invokerType(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
505 |
Name[] names = arguments(2, lambdaType); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
506 |
final int collectNamePos = names.length - 2; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
507 |
final int targetNamePos = names.length - 1; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
508 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
509 |
Name[] collectorArgs = Arrays.copyOfRange(names, 1 + collectArgPos, 1 + collectArgPos + collectArgCount); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
510 |
names[collectNamePos] = new Name(collector, (Object[]) collectorArgs); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
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diff
changeset
|
511 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
512 |
// Build argument array for the target. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
513 |
// Incoming LF args to copy are: [ (mh) headArgs collectArgs tailArgs ]. |
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
514 |
// Output argument array is [ headArgs (collectVal)? (collectArgs)? tailArgs ]. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
515 |
Name[] targetArgs = new Name[targetType.parameterCount()]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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diff
changeset
|
516 |
int inputArgPos = 1; // incoming LF args to copy to target |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
517 |
int targetArgPos = 0; // fill pointer for targetArgs |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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changeset
|
518 |
int chunk = collectArgPos; // |headArgs| |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
519 |
System.arraycopy(names, inputArgPos, targetArgs, targetArgPos, chunk); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
520 |
inputArgPos += chunk; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
13420
diff
changeset
|
521 |
targetArgPos += chunk; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
522 |
if (collectValType != void.class) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
523 |
targetArgs[targetArgPos++] = names[collectNamePos]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
524 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
13420
diff
changeset
|
525 |
chunk = collectArgCount; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
526 |
if (retainOriginalArgs) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
527 |
System.arraycopy(names, inputArgPos, targetArgs, targetArgPos, chunk); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
528 |
targetArgPos += chunk; // optionally pass on the collected chunk |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
529 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
530 |
inputArgPos += chunk; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
531 |
chunk = targetArgs.length - targetArgPos; // all the rest |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
532 |
System.arraycopy(names, inputArgPos, targetArgs, targetArgPos, chunk); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
533 |
assert(inputArgPos + chunk == collectNamePos); // use of rest of input args also |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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parents:
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diff
changeset
|
534 |
names[targetNamePos] = new Name(target, (Object[]) targetArgs); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
535 |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
536 |
LambdaForm form = new LambdaForm("collect", lambdaType.parameterCount(), names); |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
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parents:
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changeset
|
537 |
return SimpleMethodHandle.make(srcType, form); |
4537 | 538 |
} |
539 |
||
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
540 |
static |
9730
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
541 |
MethodHandle selectAlternative(boolean testResult, MethodHandle target, MethodHandle fallback) { |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
542 |
return testResult ? target : fallback; |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
543 |
} |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
544 |
|
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
545 |
static MethodHandle SELECT_ALTERNATIVE; |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
546 |
static MethodHandle selectAlternative() { |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
547 |
if (SELECT_ALTERNATIVE != null) return SELECT_ALTERNATIVE; |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
548 |
try { |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
549 |
SELECT_ALTERNATIVE |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
550 |
= IMPL_LOOKUP.findStatic(MethodHandleImpl.class, "selectAlternative", |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
551 |
MethodType.methodType(MethodHandle.class, boolean.class, MethodHandle.class, MethodHandle.class)); |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
552 |
} catch (ReflectiveOperationException ex) { |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
553 |
throw new RuntimeException(ex); |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
554 |
} |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
555 |
return SELECT_ALTERNATIVE; |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
556 |
} |
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
557 |
|
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
558 |
static |
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
559 |
MethodHandle makeGuardWithTest(MethodHandle test, |
4537 | 560 |
MethodHandle target, |
561 |
MethodHandle fallback) { |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
562 |
MethodType basicType = target.type().basicType(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
563 |
MethodHandle invokeBasic = MethodHandles.basicInvoker(basicType); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
564 |
int arity = basicType.parameterCount(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
565 |
int extraNames = 3; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
566 |
MethodType lambdaType = basicType.invokerType(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
567 |
Name[] names = arguments(extraNames, lambdaType); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
568 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
569 |
Object[] testArgs = Arrays.copyOfRange(names, 1, 1 + arity, Object[].class); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
570 |
Object[] targetArgs = Arrays.copyOfRange(names, 0, 1 + arity, Object[].class); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
571 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
572 |
// call test |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
573 |
names[arity + 1] = new Name(test, testArgs); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
574 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
575 |
// call selectAlternative |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
576 |
Object[] selectArgs = { names[arity + 1], target, fallback }; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
577 |
names[arity + 2] = new Name(MethodHandleImpl.selectAlternative(), selectArgs); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
578 |
targetArgs[0] = names[arity + 2]; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
579 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
580 |
// call target or fallback |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
581 |
names[arity + 3] = new Name(new NamedFunction(invokeBasic), targetArgs); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
582 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
583 |
LambdaForm form = new LambdaForm("guard", lambdaType.parameterCount(), names); |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
584 |
return SimpleMethodHandle.make(target.type(), form); |
4537 | 585 |
} |
586 |
||
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
587 |
private static class GuardWithCatch { |
4537 | 588 |
private final MethodHandle target; |
589 |
private final Class<? extends Throwable> exType; |
|
590 |
private final MethodHandle catcher; |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
591 |
// FIXME: Build the control flow out of foldArguments. |
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
592 |
GuardWithCatch(MethodHandle target, Class<? extends Throwable> exType, MethodHandle catcher) { |
4537 | 593 |
this.target = target; |
594 |
this.exType = exType; |
|
595 |
this.catcher = catcher; |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
596 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
597 |
@LambdaForm.Hidden |
4537 | 598 |
private Object invoke_V(Object... av) throws Throwable { |
599 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
600 |
return target.invokeExact(av); |
4537 | 601 |
} catch (Throwable t) { |
602 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
603 |
return catcher.invokeExact(t, av); |
4537 | 604 |
} |
605 |
} |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
606 |
@LambdaForm.Hidden |
4537 | 607 |
private Object invoke_L0() throws Throwable { |
608 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
609 |
return target.invokeExact(); |
4537 | 610 |
} catch (Throwable t) { |
611 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
612 |
return catcher.invokeExact(t); |
4537 | 613 |
} |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
614 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
615 |
@LambdaForm.Hidden |
4537 | 616 |
private Object invoke_L1(Object a0) throws Throwable { |
617 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
618 |
return target.invokeExact(a0); |
4537 | 619 |
} catch (Throwable t) { |
620 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
621 |
return catcher.invokeExact(t, a0); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
622 |
} |
4537 | 623 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
624 |
@LambdaForm.Hidden |
4537 | 625 |
private Object invoke_L2(Object a0, Object a1) throws Throwable { |
626 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
627 |
return target.invokeExact(a0, a1); |
4537 | 628 |
} catch (Throwable t) { |
629 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
630 |
return catcher.invokeExact(t, a0, a1); |
4537 | 631 |
} |
632 |
} |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
633 |
@LambdaForm.Hidden |
4537 | 634 |
private Object invoke_L3(Object a0, Object a1, Object a2) throws Throwable { |
635 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
636 |
return target.invokeExact(a0, a1, a2); |
4537 | 637 |
} catch (Throwable t) { |
638 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
639 |
return catcher.invokeExact(t, a0, a1, a2); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
640 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
641 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
642 |
@LambdaForm.Hidden |
4537 | 643 |
private Object invoke_L4(Object a0, Object a1, Object a2, Object a3) throws Throwable { |
644 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
645 |
return target.invokeExact(a0, a1, a2, a3); |
4537 | 646 |
} catch (Throwable t) { |
647 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
648 |
return catcher.invokeExact(t, a0, a1, a2, a3); |
4537 | 649 |
} |
650 |
} |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
651 |
@LambdaForm.Hidden |
4537 | 652 |
private Object invoke_L5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { |
653 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
654 |
return target.invokeExact(a0, a1, a2, a3, a4); |
4537 | 655 |
} catch (Throwable t) { |
656 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
657 |
return catcher.invokeExact(t, a0, a1, a2, a3, a4); |
4537 | 658 |
} |
659 |
} |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
660 |
@LambdaForm.Hidden |
4537 | 661 |
private Object invoke_L6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { |
662 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
663 |
return target.invokeExact(a0, a1, a2, a3, a4, a5); |
4537 | 664 |
} catch (Throwable t) { |
665 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
666 |
return catcher.invokeExact(t, a0, a1, a2, a3, a4, a5); |
4537 | 667 |
} |
668 |
} |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
669 |
@LambdaForm.Hidden |
4537 | 670 |
private Object invoke_L7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { |
671 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
672 |
return target.invokeExact(a0, a1, a2, a3, a4, a5, a6); |
4537 | 673 |
} catch (Throwable t) { |
674 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
675 |
return catcher.invokeExact(t, a0, a1, a2, a3, a4, a5, a6); |
4537 | 676 |
} |
677 |
} |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
678 |
@LambdaForm.Hidden |
4537 | 679 |
private Object invoke_L8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { |
680 |
try { |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
681 |
return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7); |
4537 | 682 |
} catch (Throwable t) { |
683 |
if (!exType.isInstance(t)) throw t; |
|
7556
4a5711d43948
6979327: method handle invocation should use casts instead of type parameters to specify return type
jrose
parents:
7555
diff
changeset
|
684 |
return catcher.invokeExact(t, a0, a1, a2, a3, a4, a5, a6, a7); |
4537 | 685 |
} |
686 |
} |
|
687 |
static MethodHandle[] makeInvokes() { |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
688 |
ArrayList<MethodHandle> invokes = new ArrayList<>(); |
4537 | 689 |
MethodHandles.Lookup lookup = IMPL_LOOKUP; |
690 |
for (;;) { |
|
691 |
int nargs = invokes.size(); |
|
692 |
String name = "invoke_L"+nargs; |
|
693 |
MethodHandle invoke = null; |
|
694 |
try { |
|
695 |
invoke = lookup.findVirtual(GuardWithCatch.class, name, MethodType.genericMethodType(nargs)); |
|
8347
e5daa5772ffd
7013730: JSR 292 reflective operations should report errors with standard exception types
jrose
parents:
8346
diff
changeset
|
696 |
} catch (ReflectiveOperationException ex) { |
4537 | 697 |
} |
698 |
if (invoke == null) break; |
|
699 |
invokes.add(invoke); |
|
700 |
} |
|
701 |
assert(invokes.size() == 9); // current number of methods |
|
702 |
return invokes.toArray(new MethodHandle[0]); |
|
703 |
}; |
|
704 |
static final MethodHandle[] INVOKES = makeInvokes(); |
|
705 |
// For testing use this: |
|
706 |
//static final MethodHandle[] INVOKES = Arrays.copyOf(makeInvokes(), 2); |
|
707 |
static final MethodHandle VARARGS_INVOKE; |
|
708 |
static { |
|
709 |
try { |
|
710 |
VARARGS_INVOKE = IMPL_LOOKUP.findVirtual(GuardWithCatch.class, "invoke_V", MethodType.genericMethodType(0, true)); |
|
8347
e5daa5772ffd
7013730: JSR 292 reflective operations should report errors with standard exception types
jrose
parents:
8346
diff
changeset
|
711 |
} catch (ReflectiveOperationException ex) { |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
712 |
throw uncaughtException(ex); |
4537 | 713 |
} |
714 |
} |
|
715 |
} |
|
716 |
||
717 |
||
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
718 |
static |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
719 |
MethodHandle makeGuardWithCatch(MethodHandle target, |
4537 | 720 |
Class<? extends Throwable> exType, |
721 |
MethodHandle catcher) { |
|
722 |
MethodType type = target.type(); |
|
723 |
MethodType ctype = catcher.type(); |
|
724 |
int nargs = type.parameterCount(); |
|
725 |
if (nargs < GuardWithCatch.INVOKES.length) { |
|
726 |
MethodType gtype = type.generic(); |
|
727 |
MethodType gcatchType = gtype.insertParameterTypes(0, Throwable.class); |
|
9859
47e26ad535c4
7052202: JSR 292: Crash in sun.invoke.util.ValueConversions.fillArray
jrose
parents:
9780
diff
changeset
|
728 |
// Note: convertArguments(...2) avoids interface casts present in convertArguments(...0) |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
729 |
MethodHandle gtarget = makePairwiseConvert(target, gtype, 2); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
730 |
MethodHandle gcatcher = makePairwiseConvert(catcher, gcatchType, 2); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
731 |
GuardWithCatch gguard = new GuardWithCatch(gtarget, exType, gcatcher); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
732 |
if (gtarget == null || gcatcher == null) throw new InternalError(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
733 |
MethodHandle ginvoker = GuardWithCatch.INVOKES[nargs].bindReceiver(gguard); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
734 |
return makePairwiseConvert(ginvoker, type, 2); |
4537 | 735 |
} else { |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
736 |
MethodHandle gtarget = makeSpreadArguments(target, Object[].class, 0, nargs); |
9730
e4b334d47f4b
7032850: MethodHandle.invokeGeneric throws unspecified RuntimeException if parameterized method is called
jrose
parents:
9646
diff
changeset
|
737 |
catcher = catcher.asType(ctype.changeParameterType(0, Throwable.class)); |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
738 |
MethodHandle gcatcher = makeSpreadArguments(catcher, Object[].class, 1, nargs); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
739 |
GuardWithCatch gguard = new GuardWithCatch(gtarget, exType, gcatcher); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
740 |
if (gtarget == null || gcatcher == null) throw new InternalError(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
741 |
MethodHandle ginvoker = GuardWithCatch.VARARGS_INVOKE.bindReceiver(gguard); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
742 |
return makeCollectArguments(ginvoker, ValueConversions.varargsArray(nargs), 0, false); |
4537 | 743 |
} |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
744 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
745 |
|
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
746 |
static |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
747 |
MethodHandle throwException(MethodType type) { |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
748 |
assert(Throwable.class.isAssignableFrom(type.parameterType(0))); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
749 |
int arity = type.parameterCount(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
750 |
if (arity > 1) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
751 |
return throwException(type.dropParameterTypes(1, arity)).dropArguments(type, 1, arity-1); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
752 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
753 |
return makePairwiseConvert(throwException(), type, 2); |
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
754 |
} |
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
755 |
|
8821
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
756 |
static MethodHandle THROW_EXCEPTION; |
2836ee97ee27
6839872: remove implementation inheritance from JSR 292 APIs
jrose
parents:
8347
diff
changeset
|
757 |
static MethodHandle throwException() { |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
758 |
MethodHandle mh = THROW_EXCEPTION; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
759 |
if (mh != null) return mh; |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
760 |
try { |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
761 |
mh |
4537 | 762 |
= IMPL_LOOKUP.findStatic(MethodHandleImpl.class, "throwException", |
763 |
MethodType.methodType(Empty.class, Throwable.class)); |
|
8347
e5daa5772ffd
7013730: JSR 292 reflective operations should report errors with standard exception types
jrose
parents:
8346
diff
changeset
|
764 |
} catch (ReflectiveOperationException ex) { |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
765 |
throw new RuntimeException(ex); |
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
766 |
} |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
767 |
THROW_EXCEPTION = mh; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
768 |
return mh; |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5725
diff
changeset
|
769 |
} |
4537 | 770 |
static <T extends Throwable> Empty throwException(T t) throws T { throw t; } |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
771 |
|
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
772 |
static MethodHandle FAKE_METHOD_HANDLE_INVOKE; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
773 |
static |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
774 |
MethodHandle fakeMethodHandleInvoke(MemberName method) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
775 |
MethodType type = method.getInvocationType(); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
776 |
assert(type.equals(MethodType.methodType(Object.class, Object[].class))); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
777 |
MethodHandle mh = FAKE_METHOD_HANDLE_INVOKE; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
778 |
if (mh != null) return mh; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
779 |
mh = throwException(type.insertParameterTypes(0, UnsupportedOperationException.class)); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
780 |
mh = mh.bindTo(new UnsupportedOperationException("cannot reflectively invoke MethodHandle")); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
781 |
FAKE_METHOD_HANDLE_INVOKE = mh; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
782 |
return mh; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
783 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13420
diff
changeset
|
784 |
|
14222 | 785 |
/** |
786 |
* Create an alias for the method handle which, when called, |
|
787 |
* appears to be called from the same class loader and protection domain |
|
788 |
* as hostClass. |
|
789 |
* This is an expensive no-op unless the method which is called |
|
790 |
* is sensitive to its caller. A small number of system methods |
|
791 |
* are in this category, including Class.forName and Method.invoke. |
|
792 |
*/ |
|
793 |
static |
|
794 |
MethodHandle bindCaller(MethodHandle mh, Class<?> hostClass) { |
|
795 |
return BindCaller.bindCaller(mh, hostClass); |
|
796 |
} |
|
797 |
||
798 |
// Put the whole mess into its own nested class. |
|
799 |
// That way we can lazily load the code and set up the constants. |
|
800 |
private static class BindCaller { |
|
801 |
static |
|
802 |
MethodHandle bindCaller(MethodHandle mh, Class<?> hostClass) { |
|
803 |
// Do not use this function to inject calls into system classes. |
|
804 |
if (hostClass == null) { |
|
805 |
hostClass = C_Trampoline; |
|
806 |
} else if (hostClass.isArray() || |
|
807 |
hostClass.isPrimitive() || |
|
808 |
hostClass.getName().startsWith("java.") || |
|
809 |
hostClass.getName().startsWith("sun.")) { |
|
810 |
throw new InternalError(); // does not happen, and should not anyway |
|
811 |
} |
|
812 |
// For simplicity, convert mh to a varargs-like method. |
|
813 |
MethodHandle vamh = prepareForInvoker(mh); |
|
814 |
// Cache the result of makeInjectedInvoker once per argument class. |
|
815 |
MethodHandle bccInvoker = CV_makeInjectedInvoker.get(hostClass); |
|
816 |
return restoreToType(bccInvoker.bindTo(vamh), mh.type()); |
|
817 |
} |
|
818 |
||
819 |
// This class ("Trampoline") is known to be inside a dead-end class loader. |
|
820 |
// Inject all doubtful calls into this class. |
|
821 |
private static Class<?> C_Trampoline; |
|
822 |
static { |
|
823 |
Class<?> tramp = null; |
|
824 |
try { |
|
825 |
final int FRAME_COUNT_ARG = 1; // [0] Reflection [1] Trampoline |
|
826 |
java.lang.reflect.Method gcc = sun.reflect.Reflection.class.getMethod("getCallerClass", int.class); |
|
827 |
tramp = (Class<?>) sun.reflect.misc.MethodUtil.invoke(gcc, null, new Object[]{ FRAME_COUNT_ARG }); |
|
828 |
if (tramp.getClassLoader() == BindCaller.class.getClassLoader()) |
|
829 |
throw new RuntimeException(tramp.getName()+" class loader"); |
|
830 |
} catch (Throwable ex) { |
|
831 |
throw new InternalError(ex); |
|
832 |
} |
|
833 |
C_Trampoline = tramp; |
|
834 |
} |
|
835 |
||
836 |
private static MethodHandle makeInjectedInvoker(Class<?> hostClass) { |
|
837 |
Class<?> bcc = UNSAFE.defineAnonymousClass(hostClass, T_BYTES, null); |
|
838 |
if (hostClass.getClassLoader() != bcc.getClassLoader()) |
|
839 |
throw new InternalError(hostClass.getName()+" (CL)"); |
|
840 |
try { |
|
841 |
if (hostClass.getProtectionDomain() != bcc.getProtectionDomain()) |
|
842 |
throw new InternalError(hostClass.getName()+" (PD)"); |
|
843 |
} catch (SecurityException ex) { |
|
844 |
// Self-check was blocked by security manager. This is OK. |
|
845 |
// In fact the whole try body could be turned into an assertion. |
|
846 |
} |
|
847 |
try { |
|
848 |
MethodHandle init = IMPL_LOOKUP.findStatic(bcc, "init", MethodType.methodType(void.class)); |
|
849 |
init.invokeExact(); // force initialization of the class |
|
850 |
} catch (Throwable ex) { |
|
851 |
throw uncaughtException(ex); |
|
852 |
} |
|
853 |
MethodHandle bccInvoker; |
|
854 |
try { |
|
855 |
MethodType invokerMT = MethodType.methodType(Object.class, MethodHandle.class, Object[].class); |
|
856 |
bccInvoker = IMPL_LOOKUP.findStatic(bcc, "invoke_V", invokerMT); |
|
857 |
} catch (ReflectiveOperationException ex) { |
|
858 |
throw uncaughtException(ex); |
|
859 |
} |
|
860 |
// Test the invoker, to ensure that it really injects into the right place. |
|
861 |
try { |
|
862 |
MethodHandle vamh = prepareForInvoker(MH_checkCallerClass); |
|
863 |
Object ok = bccInvoker.invokeExact(vamh, new Object[]{hostClass, bcc}); |
|
864 |
} catch (Throwable ex) { |
|
865 |
throw new InternalError(ex); |
|
866 |
} |
|
867 |
return bccInvoker; |
|
868 |
} |
|
869 |
private static ClassValue<MethodHandle> CV_makeInjectedInvoker = new ClassValue<MethodHandle>() { |
|
870 |
@Override protected MethodHandle computeValue(Class<?> hostClass) { |
|
871 |
return makeInjectedInvoker(hostClass); |
|
872 |
} |
|
873 |
}; |
|
874 |
||
875 |
// Adapt mh so that it can be called directly from an injected invoker: |
|
876 |
private static MethodHandle prepareForInvoker(MethodHandle mh) { |
|
877 |
mh = mh.asFixedArity(); |
|
878 |
MethodType mt = mh.type(); |
|
879 |
int arity = mt.parameterCount(); |
|
880 |
MethodHandle vamh = mh.asType(mt.generic()); |
|
881 |
vamh.internalForm().compileToBytecode(); // eliminate LFI stack frames |
|
882 |
vamh = vamh.asSpreader(Object[].class, arity); |
|
883 |
vamh.internalForm().compileToBytecode(); // eliminate LFI stack frames |
|
884 |
return vamh; |
|
885 |
} |
|
886 |
||
887 |
// Undo the adapter effect of prepareForInvoker: |
|
888 |
private static MethodHandle restoreToType(MethodHandle vamh, MethodType type) { |
|
889 |
return vamh.asCollector(Object[].class, type.parameterCount()).asType(type); |
|
890 |
} |
|
891 |
||
892 |
private static final MethodHandle MH_checkCallerClass; |
|
893 |
static { |
|
894 |
final Class<?> THIS_CLASS = BindCaller.class; |
|
895 |
assert(checkCallerClass(THIS_CLASS, THIS_CLASS)); |
|
896 |
try { |
|
897 |
MH_checkCallerClass = IMPL_LOOKUP |
|
898 |
.findStatic(THIS_CLASS, "checkCallerClass", |
|
899 |
MethodType.methodType(boolean.class, Class.class, Class.class)); |
|
900 |
assert((boolean) MH_checkCallerClass.invokeExact(THIS_CLASS, THIS_CLASS)); |
|
901 |
} catch (Throwable ex) { |
|
902 |
throw new InternalError(ex); |
|
903 |
} |
|
904 |
} |
|
905 |
||
906 |
private static boolean checkCallerClass(Class<?> expected, Class<?> expected2) { |
|
907 |
final int FRAME_COUNT_ARG = 2; // [0] Reflection [1] BindCaller [2] Expected |
|
908 |
Class<?> actual = sun.reflect.Reflection.getCallerClass(FRAME_COUNT_ARG); |
|
909 |
if (actual != expected && actual != expected2) |
|
910 |
throw new InternalError("found "+actual.getName()+", expected "+expected.getName() |
|
911 |
+(expected == expected2 ? "" : ", or else "+expected2.getName())); |
|
912 |
return true; |
|
913 |
} |
|
914 |
||
915 |
private static final byte[] T_BYTES; |
|
916 |
static { |
|
917 |
final Object[] values = {null}; |
|
918 |
AccessController.doPrivileged(new PrivilegedAction<Void>() { |
|
919 |
public Void run() { |
|
920 |
try { |
|
921 |
Class<T> tClass = T.class; |
|
922 |
String tName = tClass.getName(); |
|
923 |
String tResource = tName.substring(tName.lastIndexOf('.')+1)+".class"; |
|
924 |
java.net.URLConnection uconn = tClass.getResource(tResource).openConnection(); |
|
925 |
int len = uconn.getContentLength(); |
|
926 |
byte[] bytes = new byte[len]; |
|
927 |
try (java.io.InputStream str = uconn.getInputStream()) { |
|
928 |
int nr = str.read(bytes); |
|
929 |
if (nr != len) throw new java.io.IOException(tResource); |
|
930 |
} |
|
931 |
values[0] = bytes; |
|
932 |
} catch (java.io.IOException ex) { |
|
933 |
throw new InternalError(ex); |
|
934 |
} |
|
935 |
return null; |
|
936 |
} |
|
937 |
}); |
|
938 |
T_BYTES = (byte[]) values[0]; |
|
939 |
} |
|
940 |
||
941 |
// The following class is used as a template for Unsafe.defineAnonymousClass: |
|
942 |
private static class T { |
|
943 |
static void init() { } // side effect: initializes this class |
|
944 |
static Object invoke_V(MethodHandle vamh, Object[] args) throws Throwable { |
|
945 |
return vamh.invokeExact(args); |
|
946 |
} |
|
947 |
} |
|
948 |
} |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
949 |
} |