1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/jdk/nashorn/internal/lookup/MethodHandleFactory.java Wed Apr 27 01:36:41 2016 +0800
1.3 @@ -0,0 +1,646 @@
1.4 +/*
1.5 + * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package jdk.nashorn.internal.lookup;
1.30 +
1.31 +import java.io.ByteArrayOutputStream;
1.32 +import java.io.PrintStream;
1.33 +import java.lang.invoke.MethodHandle;
1.34 +import java.lang.invoke.MethodHandles;
1.35 +import java.lang.invoke.MethodType;
1.36 +import java.lang.invoke.SwitchPoint;
1.37 +import java.lang.reflect.Method;
1.38 +import java.util.ArrayList;
1.39 +import java.util.Arrays;
1.40 +import java.util.List;
1.41 +import java.util.logging.Level;
1.42 +import jdk.nashorn.internal.runtime.ConsString;
1.43 +import jdk.nashorn.internal.runtime.Debug;
1.44 +import jdk.nashorn.internal.runtime.DebugLogger;
1.45 +import jdk.nashorn.internal.runtime.ScriptObject;
1.46 +import jdk.nashorn.internal.runtime.options.Options;
1.47 +
1.48 +/**
1.49 + * This class is abstraction for all method handle, switchpoint and method type
1.50 + * operations. This enables the functionality interface to be subclassed and
1.51 + * intrumensted, as it has been proven vital to keep the number of method
1.52 + * handles in the system down.
1.53 + *
1.54 + * All operations of the above type should go through this class, and not
1.55 + * directly into java.lang.invoke
1.56 + *
1.57 + */
1.58 +public final class MethodHandleFactory {
1.59 +
1.60 + private static final MethodHandles.Lookup PUBLIC_LOOKUP = MethodHandles.publicLookup();
1.61 + private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
1.62 +
1.63 + private static final Level TRACE_LEVEL = Level.INFO;
1.64 +
1.65 + private MethodHandleFactory() {
1.66 + }
1.67 +
1.68 + /**
1.69 + * Runtime exception that collects every reason that a method handle lookup operation can go wrong
1.70 + */
1.71 + @SuppressWarnings("serial")
1.72 + public static class LookupException extends RuntimeException {
1.73 + /**
1.74 + * Constructor
1.75 + * @param e causing exception
1.76 + */
1.77 + public LookupException(final Exception e) {
1.78 + super(e);
1.79 + }
1.80 + }
1.81 +
1.82 + /**
1.83 + * Helper function that takes a class or an object with a toString override
1.84 + * and shortens it to notation after last dot. This is used to facilitiate
1.85 + * pretty printouts in various debug loggers - internal only
1.86 + *
1.87 + * @param obj class or object
1.88 + *
1.89 + * @return pretty version of object as string
1.90 + */
1.91 + public static String stripName(final Object obj) {
1.92 + if (obj == null) {
1.93 + return "null";
1.94 + }
1.95 +
1.96 + if (obj instanceof Class) {
1.97 + return ((Class<?>)obj).getSimpleName();
1.98 + }
1.99 + return obj.toString();
1.100 + }
1.101 +
1.102 + private static final MethodHandleFunctionality STANDARD = new StandardMethodHandleFunctionality();
1.103 + private static final MethodHandleFunctionality FUNC;
1.104 +
1.105 + private static final String DEBUG_PROPERTY = "nashorn.methodhandles.debug";
1.106 + private static final DebugLogger LOG = new DebugLogger("methodhandles", DEBUG_PROPERTY);
1.107 +
1.108 + static {
1.109 + if (LOG.isEnabled() || Options.getBooleanProperty(DEBUG_PROPERTY)) {
1.110 + if (Options.getStringProperty(DEBUG_PROPERTY, "").equals("create")) {
1.111 + FUNC = new TraceCreateMethodHandleFunctionality();
1.112 + } else {
1.113 + FUNC = new TraceMethodHandleFunctionality();
1.114 + }
1.115 + } else {
1.116 + FUNC = STANDARD;
1.117 + }
1.118 + }
1.119 +
1.120 + private static final boolean PRINT_STACKTRACE = Options.getBooleanProperty("nashorn.methodhandles.debug.stacktrace");
1.121 +
1.122 +
1.123 + /**
1.124 + * Return the method handle functionality used for all method handle operations
1.125 + * @return a method handle functionality implementation
1.126 + */
1.127 + public static MethodHandleFunctionality getFunctionality() {
1.128 + return FUNC;
1.129 + }
1.130 +
1.131 + private static final MethodHandle TRACE = STANDARD.findStatic(LOOKUP, MethodHandleFactory.class, "traceArgs", MethodType.methodType(void.class, DebugLogger.class, String.class, int.class, Object[].class));
1.132 + private static final MethodHandle TRACE_RETURN = STANDARD.findStatic(LOOKUP, MethodHandleFactory.class, "traceReturn", MethodType.methodType(Object.class, DebugLogger.class, Object.class));
1.133 +
1.134 + /**
1.135 + * Tracer that is applied before a value is returned from the traced function. It will output the return
1.136 + * value and its class
1.137 + *
1.138 + * @param value return value for filter
1.139 + * @return return value unmodified
1.140 + */
1.141 + static Object traceReturn(final DebugLogger logger, final Object value) {
1.142 + final String str = "\treturn: " + stripName(value) + " [type=" + (value == null ? "null" : stripName(value.getClass()) + ']');
1.143 + logger.log(TRACE_LEVEL, str);
1.144 + return value;
1.145 + }
1.146 +
1.147 + /**
1.148 + * Tracer that is applied before a function is called, printing the arguments
1.149 + *
1.150 + * @param tag tag to start the debug printout string
1.151 + * @param paramStart param index to start outputting from
1.152 + * @param args arguments to the function
1.153 + */
1.154 + static void traceArgs(final DebugLogger logger, final String tag, final int paramStart, final Object... args) {
1.155 + final StringBuilder sb = new StringBuilder();
1.156 +
1.157 + sb.append(tag);
1.158 +
1.159 + for (int i = paramStart; i < args.length; i++) {
1.160 + if (i == paramStart) {
1.161 + sb.append(" => args: ");
1.162 + }
1.163 +
1.164 + sb.append('\'').
1.165 + append(stripName(argString(args[i]))).
1.166 + append('\'').
1.167 + append(' ').
1.168 + append('[').
1.169 + append("type=").
1.170 + append(args[i] == null ? "null" : stripName(args[i].getClass())).
1.171 + append(']');
1.172 +
1.173 + if (i + 1 < args.length) {
1.174 + sb.append(", ");
1.175 + }
1.176 + }
1.177 +
1.178 + assert logger != null;
1.179 + logger.log(TRACE_LEVEL, sb);
1.180 + stacktrace(logger);
1.181 + }
1.182 +
1.183 + private static void stacktrace(final DebugLogger logger) {
1.184 + if (!PRINT_STACKTRACE) {
1.185 + return;
1.186 + }
1.187 + final ByteArrayOutputStream baos = new ByteArrayOutputStream();
1.188 + final PrintStream ps = new PrintStream(baos);
1.189 + new Throwable().printStackTrace(ps);
1.190 + logger.log(TRACE_LEVEL, baos.toString());
1.191 + }
1.192 +
1.193 + private static String argString(final Object arg) {
1.194 + if (arg == null) {
1.195 + return "null";
1.196 + }
1.197 +
1.198 + if (arg.getClass().isArray()) {
1.199 + final List<Object> list = new ArrayList<>();
1.200 + for (final Object elem : (Object[])arg) {
1.201 + list.add('\'' + argString(elem) + '\'');
1.202 + }
1.203 +
1.204 + return list.toString();
1.205 + }
1.206 +
1.207 + if (arg instanceof ScriptObject) {
1.208 + return arg.toString() +
1.209 + " (map=" + Debug.id((((ScriptObject)arg).getMap())) +
1.210 + ")";
1.211 + }
1.212 +
1.213 + return arg.toString();
1.214 + }
1.215 +
1.216 + /**
1.217 + * Add a debug printout to a method handle, tracing parameters and return values
1.218 + *
1.219 + * @param logger a specific logger to which to write the output
1.220 + * @param mh method handle to trace
1.221 + * @param tag start of trace message
1.222 + * @return traced method handle
1.223 + */
1.224 + public static MethodHandle addDebugPrintout(final DebugLogger logger, final MethodHandle mh, final Object tag) {
1.225 + return addDebugPrintout(logger, mh, 0, true, tag);
1.226 + }
1.227 +
1.228 +
1.229 + /**
1.230 + * Add a debug printout to a method handle, tracing parameters and return values
1.231 + *
1.232 + * @param logger a specific logger to which to write the output
1.233 + * @param mh method handle to trace
1.234 + * @param paramStart first param to print/trace
1.235 + * @param printReturnValue should we print/trace return value if available?
1.236 + * @param tag start of trace message
1.237 + * @return traced method handle
1.238 + */
1.239 + public static MethodHandle addDebugPrintout(final DebugLogger logger, final MethodHandle mh, final int paramStart, final boolean printReturnValue, final Object tag) {
1.240 + final MethodType type = mh.type();
1.241 +
1.242 + if (logger != null && logger.levelAbove(TRACE_LEVEL)) {
1.243 + return mh;
1.244 + }
1.245 +
1.246 + assert logger != null;
1.247 + assert TRACE != null;
1.248 +
1.249 + MethodHandle trace = MethodHandles.insertArguments(TRACE, 0, logger, tag, paramStart);
1.250 +
1.251 + trace = MethodHandles.foldArguments(
1.252 + mh,
1.253 + trace.asCollector(
1.254 + Object[].class,
1.255 + type.parameterCount()).
1.256 + asType(type.changeReturnType(void.class)));
1.257 +
1.258 + final Class<?> retType = type.returnType();
1.259 + if (retType != void.class && printReturnValue) {
1.260 + final MethodHandle traceReturn = MethodHandles.insertArguments(TRACE_RETURN, 0, logger);
1.261 + trace = MethodHandles.filterReturnValue(trace,
1.262 + traceReturn.asType(
1.263 + traceReturn.type().changeParameterType(0, retType).changeReturnType(retType)));
1.264 + }
1.265 +
1.266 + return trace;
1.267 + }
1.268 +
1.269 + /**
1.270 + * The standard class that marshalls all method handle operations to the java.lang.invoke
1.271 + * package. This exists only so that it can be subclassed and method handles created from
1.272 + * Nashorn made possible to instrument.
1.273 + *
1.274 + * All Nashorn classes should use the MethodHandleFactory for their method handle operations
1.275 + */
1.276 + private static class StandardMethodHandleFunctionality implements MethodHandleFunctionality {
1.277 +
1.278 + @Override
1.279 + public MethodHandle filterArguments(final MethodHandle target, final int pos, final MethodHandle... filters) {
1.280 + return MethodHandles.filterArguments(target, pos, filters);
1.281 + }
1.282 +
1.283 + @Override
1.284 + public MethodHandle filterReturnValue(final MethodHandle target, final MethodHandle filter) {
1.285 + return MethodHandles.filterReturnValue(target, filter);
1.286 + }
1.287 +
1.288 + @Override
1.289 + public MethodHandle guardWithTest(final MethodHandle test, final MethodHandle target, final MethodHandle fallback) {
1.290 + return MethodHandles.guardWithTest(test, target, fallback);
1.291 + }
1.292 +
1.293 + @Override
1.294 + public MethodHandle insertArguments(final MethodHandle target, final int pos, final Object... values) {
1.295 + return MethodHandles.insertArguments(target, pos, values);
1.296 + }
1.297 +
1.298 + @Override
1.299 + public MethodHandle dropArguments(final MethodHandle target, final int pos, final Class<?>... valueTypes) {
1.300 + return MethodHandles.dropArguments(target, pos, valueTypes);
1.301 + }
1.302 +
1.303 + @Override
1.304 + public MethodHandle dropArguments(final MethodHandle target, final int pos, final List<Class<?>> valueTypes) {
1.305 + return MethodHandles.dropArguments(target, pos, valueTypes);
1.306 + }
1.307 +
1.308 + @Override
1.309 + public MethodHandle asType(final MethodHandle handle, final MethodType type) {
1.310 + return handle.asType(type);
1.311 + }
1.312 +
1.313 + @Override
1.314 + public MethodHandle bindTo(final MethodHandle handle, final Object x) {
1.315 + return handle.bindTo(x);
1.316 + }
1.317 +
1.318 + @Override
1.319 + public MethodHandle foldArguments(final MethodHandle target, final MethodHandle combiner) {
1.320 + return MethodHandles.foldArguments(target, combiner);
1.321 + }
1.322 +
1.323 + @Override
1.324 + public MethodHandle explicitCastArguments(final MethodHandle target, final MethodType type) {
1.325 + return MethodHandles.explicitCastArguments(target, type);
1.326 + }
1.327 +
1.328 + @Override
1.329 + public MethodHandle arrayElementGetter(final Class<?> type) {
1.330 + return MethodHandles.arrayElementGetter(type);
1.331 + }
1.332 +
1.333 + @Override
1.334 + public MethodHandle arrayElementSetter(final Class<?> type) {
1.335 + return MethodHandles.arrayElementSetter(type);
1.336 + }
1.337 +
1.338 + @Override
1.339 + public MethodHandle throwException(final Class<?> returnType, final Class<? extends Throwable> exType) {
1.340 + return MethodHandles.throwException(returnType, exType);
1.341 + }
1.342 +
1.343 + @Override
1.344 + public MethodHandle constant(final Class<?> type, final Object value) {
1.345 + return MethodHandles.constant(type, value);
1.346 + }
1.347 +
1.348 + @Override
1.349 + public MethodHandle asCollector(final MethodHandle handle, final Class<?> arrayType, final int arrayLength) {
1.350 + return handle.asCollector(arrayType, arrayLength);
1.351 + }
1.352 +
1.353 + @Override
1.354 + public MethodHandle asSpreader(final MethodHandle handle, final Class<?> arrayType, final int arrayLength) {
1.355 + return handle.asSpreader(arrayType, arrayLength);
1.356 + }
1.357 +
1.358 + @Override
1.359 + public MethodHandle getter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.360 + try {
1.361 + return explicitLookup.findGetter(clazz, name, type);
1.362 + } catch (final NoSuchFieldException | IllegalAccessException e) {
1.363 + throw new LookupException(e);
1.364 + }
1.365 + }
1.366 +
1.367 + @Override
1.368 + public MethodHandle staticGetter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.369 + try {
1.370 + return explicitLookup.findStaticGetter(clazz, name, type);
1.371 + } catch (final NoSuchFieldException | IllegalAccessException e) {
1.372 + throw new LookupException(e);
1.373 + }
1.374 + }
1.375 +
1.376 +
1.377 + @Override
1.378 + public MethodHandle setter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.379 + try {
1.380 + return explicitLookup.findSetter(clazz, name, type);
1.381 + } catch (final NoSuchFieldException | IllegalAccessException e) {
1.382 + throw new LookupException(e);
1.383 + }
1.384 + }
1.385 +
1.386 + @Override
1.387 + public MethodHandle staticSetter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.388 + try {
1.389 + return explicitLookup.findStaticSetter(clazz, name, type);
1.390 + } catch (final NoSuchFieldException | IllegalAccessException e) {
1.391 + throw new LookupException(e);
1.392 + }
1.393 + }
1.394 +
1.395 + @Override
1.396 + public MethodHandle find(final Method method) {
1.397 + try {
1.398 + return PUBLIC_LOOKUP.unreflect(method);
1.399 + } catch (final IllegalAccessException e) {
1.400 + throw new LookupException(e);
1.401 + }
1.402 + }
1.403 +
1.404 + @Override
1.405 + public MethodHandle findStatic(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final MethodType type) {
1.406 + try {
1.407 + return explicitLookup.findStatic(clazz, name, type);
1.408 + } catch (final NoSuchMethodException | IllegalAccessException e) {
1.409 + throw new LookupException(e);
1.410 + }
1.411 + }
1.412 +
1.413 + @Override
1.414 + public MethodHandle findVirtual(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final MethodType type) {
1.415 + try {
1.416 + return explicitLookup.findVirtual(clazz, name, type);
1.417 + } catch (final NoSuchMethodException | IllegalAccessException e) {
1.418 + throw new LookupException(e);
1.419 + }
1.420 + }
1.421 +
1.422 + @Override
1.423 + public SwitchPoint createSwitchPoint() {
1.424 + return new SwitchPoint();
1.425 + }
1.426 +
1.427 + @Override
1.428 + public MethodHandle guardWithTest(final SwitchPoint sp, final MethodHandle before, final MethodHandle after) {
1.429 + return sp.guardWithTest(before, after);
1.430 + }
1.431 +
1.432 + @Override
1.433 + public MethodType type(final Class<?> returnType, final Class<?>... paramTypes) {
1.434 + return MethodType.methodType(returnType, paramTypes);
1.435 + }
1.436 +
1.437 + }
1.438 +
1.439 + /**
1.440 + * Class used for instrumenting and debugging Nashorn generated method handles
1.441 + */
1.442 + private static class TraceMethodHandleFunctionality extends StandardMethodHandleFunctionality {
1.443 +
1.444 + protected static String describe(final Object... data) {
1.445 + final StringBuilder sb = new StringBuilder();
1.446 +
1.447 + for (int i = 0; i < data.length; i++) {
1.448 + final Object d = data[i];
1.449 + if (d == null) {
1.450 + sb.append("<null> ");
1.451 + } else if (d instanceof String || d instanceof ConsString) {
1.452 + sb.append(d.toString());
1.453 + sb.append(' ');
1.454 + } else if (d.getClass().isArray()) {
1.455 + sb.append("[ ");
1.456 + for (final Object da : (Object[])d) {
1.457 + sb.append(describe(new Object[]{ da })).append(' ');
1.458 + }
1.459 + sb.append("] ");
1.460 + } else {
1.461 + sb.append(d)
1.462 + .append('{')
1.463 + .append(Integer.toHexString(System.identityHashCode(d)))
1.464 + .append('}');
1.465 + }
1.466 +
1.467 + if (i + 1 < data.length) {
1.468 + sb.append(", ");
1.469 + }
1.470 + }
1.471 +
1.472 + return sb.toString();
1.473 + }
1.474 +
1.475 + public MethodHandle debug(final MethodHandle master, final String str, final Object... args) {
1.476 + return addDebugPrintout(LOG, master, Integer.MAX_VALUE, false, str + ' ' + describe(args));
1.477 + }
1.478 +
1.479 + @Override
1.480 + public MethodHandle filterArguments(final MethodHandle target, final int pos, final MethodHandle... filters) {
1.481 + final MethodHandle mh = super.filterArguments(target, pos, filters);
1.482 + return debug(mh, "filterArguments", target, pos, filters);
1.483 + }
1.484 +
1.485 + @Override
1.486 + public MethodHandle filterReturnValue(final MethodHandle target, final MethodHandle filter) {
1.487 + final MethodHandle mh = super.filterReturnValue(target, filter);
1.488 + return debug(mh, "filterReturnValue", target, filter);
1.489 + }
1.490 +
1.491 + @Override
1.492 + public MethodHandle guardWithTest(final MethodHandle test, final MethodHandle target, final MethodHandle fallback) {
1.493 + final MethodHandle mh = super.guardWithTest(test, target, fallback);
1.494 + return debug(mh, "guardWithTest", test, target, fallback);
1.495 + }
1.496 +
1.497 + @Override
1.498 + public MethodHandle insertArguments(final MethodHandle target, final int pos, final Object... values) {
1.499 + final MethodHandle mh = super.insertArguments(target, pos, values);
1.500 + return debug(mh, "insertArguments", target, pos, values);
1.501 + }
1.502 +
1.503 + @Override
1.504 + public MethodHandle dropArguments(final MethodHandle target, final int pos, final Class<?>... values) {
1.505 + final MethodHandle mh = super.dropArguments(target, pos, values);
1.506 + return debug(mh, "dropArguments", target, pos, values);
1.507 + }
1.508 +
1.509 + @Override
1.510 + public MethodHandle dropArguments(final MethodHandle target, final int pos, final List<Class<?>> values) {
1.511 + final MethodHandle mh = super.dropArguments(target, pos, values);
1.512 + return debug(mh, "dropArguments", target, pos, values);
1.513 + }
1.514 +
1.515 + @Override
1.516 + public MethodHandle asType(final MethodHandle handle, final MethodType type) {
1.517 + final MethodHandle mh = super.asType(handle, type);
1.518 + return debug(mh, "asType", handle, type);
1.519 + }
1.520 +
1.521 + @Override
1.522 + public MethodHandle bindTo(final MethodHandle handle, final Object x) {
1.523 + final MethodHandle mh = super.bindTo(handle, x);
1.524 + return debug(mh, "bindTo", handle, x);
1.525 + }
1.526 +
1.527 + @Override
1.528 + public MethodHandle foldArguments(final MethodHandle target, final MethodHandle combiner) {
1.529 + final MethodHandle mh = super.foldArguments(target, combiner);
1.530 + return debug(mh, "foldArguments", target, combiner);
1.531 + }
1.532 +
1.533 + @Override
1.534 + public MethodHandle explicitCastArguments(final MethodHandle target, final MethodType type) {
1.535 + final MethodHandle mh = super.explicitCastArguments(target, type);
1.536 + return debug(mh, "explicitCastArguments", target, type);
1.537 + }
1.538 +
1.539 + @Override
1.540 + public MethodHandle arrayElementGetter(final Class<?> type) {
1.541 + final MethodHandle mh = super.arrayElementGetter(type);
1.542 + return debug(mh, "arrayElementGetter", type);
1.543 + }
1.544 +
1.545 + @Override
1.546 + public MethodHandle arrayElementSetter(final Class<?> type) {
1.547 + final MethodHandle mh = super.arrayElementSetter(type);
1.548 + return debug(mh, "arrayElementSetter", type);
1.549 + }
1.550 +
1.551 + @Override
1.552 + public MethodHandle throwException(final Class<?> returnType, final Class<? extends Throwable> exType) {
1.553 + final MethodHandle mh = super.throwException(returnType, exType);
1.554 + return debug(mh, "throwException", returnType, exType);
1.555 + }
1.556 +
1.557 + @Override
1.558 + public MethodHandle constant(final Class<?> type, final Object value) {
1.559 + final MethodHandle mh = super.constant(type, value);
1.560 + return debug(mh, "constant", type, value);
1.561 + }
1.562 +
1.563 + @Override
1.564 + public MethodHandle asCollector(final MethodHandle handle, final Class<?> arrayType, final int arrayLength) {
1.565 + final MethodHandle mh = super.asCollector(handle, arrayType, arrayLength);
1.566 + return debug(mh, "asCollector", handle, arrayType, arrayLength);
1.567 + }
1.568 +
1.569 + @Override
1.570 + public MethodHandle asSpreader(final MethodHandle handle, final Class<?> arrayType, final int arrayLength) {
1.571 + final MethodHandle mh = super.asSpreader(handle, arrayType, arrayLength);
1.572 + return debug(mh, "asSpreader", handle, arrayType, arrayLength);
1.573 + }
1.574 +
1.575 + @Override
1.576 + public MethodHandle getter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.577 + final MethodHandle mh = super.getter(explicitLookup, clazz, name, type);
1.578 + return debug(mh, "getter", explicitLookup, clazz, name, type);
1.579 + }
1.580 +
1.581 + @Override
1.582 + public MethodHandle staticGetter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.583 + final MethodHandle mh = super.staticGetter(explicitLookup, clazz, name, type);
1.584 + return debug(mh, "static getter", explicitLookup, clazz, name, type);
1.585 + }
1.586 +
1.587 + @Override
1.588 + public MethodHandle setter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.589 + final MethodHandle mh = super.setter(explicitLookup, clazz, name, type);
1.590 + return debug(mh, "setter", explicitLookup, clazz, name, type);
1.591 + }
1.592 +
1.593 + @Override
1.594 + public MethodHandle staticSetter(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final Class<?> type) {
1.595 + final MethodHandle mh = super.staticSetter(explicitLookup, clazz, name, type);
1.596 + return debug(mh, "static setter", explicitLookup, clazz, name, type);
1.597 + }
1.598 +
1.599 + @Override
1.600 + public MethodHandle find(final Method method) {
1.601 + final MethodHandle mh = super.find(method);
1.602 + return debug(mh, "find", method);
1.603 + }
1.604 +
1.605 + @Override
1.606 + public MethodHandle findStatic(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final MethodType type) {
1.607 + final MethodHandle mh = super.findStatic(explicitLookup, clazz, name, type);
1.608 + return debug(mh, "findStatic", explicitLookup, clazz, name, type);
1.609 + }
1.610 +
1.611 + @Override
1.612 + public MethodHandle findVirtual(final MethodHandles.Lookup explicitLookup, final Class<?> clazz, final String name, final MethodType type) {
1.613 + final MethodHandle mh = super.findVirtual(explicitLookup, clazz, name, type);
1.614 + return debug(mh, "findVirtual", explicitLookup, clazz, name, type);
1.615 + }
1.616 +
1.617 + @Override
1.618 + public SwitchPoint createSwitchPoint() {
1.619 + final SwitchPoint sp = super.createSwitchPoint();
1.620 + LOG.log(TRACE_LEVEL, "createSwitchPoint ", sp);
1.621 + return sp;
1.622 + }
1.623 +
1.624 + @Override
1.625 + public MethodHandle guardWithTest(final SwitchPoint sp, final MethodHandle before, final MethodHandle after) {
1.626 + final MethodHandle mh = super.guardWithTest(sp, before, after);
1.627 + return debug(mh, "guardWithTest", sp, before, after);
1.628 + }
1.629 +
1.630 + @Override
1.631 + public MethodType type(final Class<?> returnType, final Class<?>... paramTypes) {
1.632 + final MethodType mt = super.type(returnType, paramTypes);
1.633 + LOG.log(TRACE_LEVEL, "methodType ", returnType, " ", Arrays.toString(paramTypes), " ", mt);
1.634 + return mt;
1.635 + }
1.636 + }
1.637 +
1.638 + /**
1.639 + * Class used for debugging Nashorn generated method handles
1.640 + */
1.641 + private static class TraceCreateMethodHandleFunctionality extends TraceMethodHandleFunctionality {
1.642 + @Override
1.643 + public MethodHandle debug(final MethodHandle master, final String str, final Object... args) {
1.644 + LOG.log(TRACE_LEVEL, str, " ", describe(args));
1.645 + stacktrace(LOG);
1.646 + return master;
1.647 + }
1.648 + }
1.649 +}
