src/jdk/internal/dynalink/DynamicLinkerFactory.java

Wed, 20 Aug 2014 10:26:01 +0200

author
attila
date
Wed, 20 Aug 2014 10:26:01 +0200
changeset 963
e2497b11a021
parent 962
ac62e33a99b0
child 1090
99571b7922c0
permissions
-rw-r--r--

8027043: Turn global accesses into MethodHandle.constant, with one chance of reassignment, e.g. x = value occuring once in the global scope is ok, twice is not.
8027958: NASHORN TEST: Create tests to test markdown javascript engine work with Nashorn
8028345: Remove nashorn repo "bin" scripts to avoid confusion with JDK bin launcher programs
8029090: Developers should be able to pass nashorn properties and enable/disable JFR from command line
8030169: Need regression test for bug JDK-8010731
8033105: Make sure Nashorn test harness can run zlib benchmark
8033334: Make sure that scope depth information is maintained in the RecompilableScriptFunctionDatas, to avoid unnecessary slow proto linkage when doing on demand compilation
8034206: Make parts of code pipeline reusable in order to facilitate faster warmup and faster lazy compilation.
8035820: Optimistic recompilation
8035836: Array performance improvements
8036127: Prototype filter needs to be applied to getter guard as well, not just getter
8036986: Test should check that correctly type is returned running with optimistic. If optimistic assumption was wrong we should get the right one.
8037086: Check that deoptimizing recompilations are correct
8037177: -Dnashorn.optimistic should be enabled by default, meaning that it has to be explicitly set to false to run with the jdk 8 style conservative types
8037534: Use scope types to determine optimistic types
8037572: Add more test cases to check static types
8037967: Broke the build, by commiting without saving the last review comment
8038223: Symbol trace debug output takes time
8038396: fix for the compiler expression evaluator to be more inquisitive about types
8038398: OptimisticRecompilationTest fails on staging repo nashorn/jdk9/nashorn due to test framework
8038406: Testability: as a first step of moving loggers away from the process global space, the Debug object now supports logging POJOs from log entries as an event queue, which can be introspected from test scripts. This is way better than screen scraping brittle and subject-to-change log output.
8038413: NPE in unboxInteger
8038416: Access to undefined scoped variables deoptimized too much
8038426: Move all loggers from process wide scope into Global scope
8038799: Guard and unbox boxed primitives types on setting them in Properties to avoid megamorphisism
8038945: Simplify strict undefined checks
8039044: Expand undefined intrinsics for all commutative combinators of scrict undefined checks
8039746: Transform applies to calls wherever possible, for ScriptFunctions and JSObjects.
8040024: BranchOptimizer produces bad code for NaN FP comparison
8040089: Apply to call transform was incomplete. Now passes all tests and performance is back
8040093: Make sure that optimistic splitting works in optimistic types
8040102: Remove all references to Unsafe and definition of anonymous clases from the code
8040655: When processing a RewriteException debug object, the return value has already been reset to null. We need to catch this value before that.
8041434: Add synchronization to the common global constants structure
8041625: AccessorProperty currentType must only by Object.class when non-primitive, and scoping followup problem for lazily generated with bodies
8041905: Fix apply2call bug that prevented avatar.js unit tests from running correctly
8041995: Problems when loading tree expressions with several optimistic program points when optimistically initializing ObjectNodes
8042118: Separate types from symbols
8043002: Improve performance of Nashorn equality operators
8043003: Use strongly referenced generic invokers
8043004: Reduce variability at JavaAdapter call sites
8043132: Nashorn : all tests failed with java.security.AccessControlException
8043133: Fix corner cases of JDK-8041995
8043137: Collapse long sequences of NOP in Nashorn bytecode output
8043232: Index selection of overloaded java new constructors
8043235: Type-based optimizations interfere with continuation methods
8043431: Fix yet another corner case of JDK-8041995
8043504: Octane test harness was missing argument to print_always at one callsite, causing erroneous logging
8043605: Enable history for empty property maps
8043608: Make equality tests inline better
8043611: Move timing dependent benchmark for apply2call specialization to currently_failing. It is dependent that nothing takes machine time when doing the two runs, causing spurious assertions. Suggest running octane.raytrace manually instead to verify that this works, or incorporating it in the nightly test suite
8043632: Parallelize class installation and various script fixes.
8043633: In order to remove global state outside of contexts, make sure Timing class is an instance and not a static global collection of data. Move into Context. Move -Dnashorn.timing to an official logging option.
8043956: Make code caching work with optimistic typing and lazy compilation
8044012: Integrate the latest best known performance flags int ant octane jobs, and make sure that it's easy to compare 'ant octane-nashorn' and 'ant octane-v8' at the push of a button. (or rather; the entry of a command line)
8044102: Ensure bechmark exclude list for Octane benchmarks is in only one place, project.properties, and fix benchmark harness
8044154: Nashorn : all tests failed with java.security.AccessControlException
8044171: Make optimistic exception handlers smaller
8044502: Get rid of global optimistic flag
8044518: Ensure exceptions related to optimistic recompilation are not serializable
8044533: Deoptimizing negation produces wrong result for zero
8044534: Constant folding for unary + should produce int for boolean literals
8044760: Avoid PropertyMap duplicate for global instances
8044786: Some tests fail with non-optimistic compilation
8044803: Unnecessary restOf check
8044816: On-demand compiled top-level program doesn't need :createProgramFunction
8044851: nashorn properties leak memory
8046013: TypeError: Cannot apply "with" to non script object
8046014: MultiGlobalCompiledScript should cache :createProgramFunction handle
8046025: AccessorProperty.getGetter is not threadsafe
8046026: CompiledFunction.relinkComposableInvoker assert is being hit
8046201: Avoid repeated flattening of nested ConsStrings
8046215: Running uncompilable scripts throws NullPointerException
8046898: Make sure that lazy compilation is the default, remove redundant "enable lazy compilation" flags, added warning message if compile logging is enabled and lazy is switched off. Verified existing test suite code coverage equivalence between lazy and eager.
8046905: apply on apply is broken
8046921: Deoptimization type information peristence
8047035: (function() "hello")() crashes in Lexer with jdk9
8047057: Add a regression test for the passing test cases from JDK-8042304
8047067: all eval arguments need to be copied in Lower
8047078: Fuzzing bug discovered when ArrayLiteralNodes weren't immutable
8047166: 'do with({}) break ; while(0);' crashes in CodeGenerator
8047331: Assertion in CompiledFunction when running earley-boyer after Merge
8047357: More precise synthetic return + unreachable throw
8047359: large string size RangeError should be thrown rather than reporting negative length
8047369: Add regression tests for passing test cases of JDK-8024971
8047371: local variable declaration in TypeEvaluator should use ScriptObject.addOwnProperty instead of .set
8047728: (function(x){var o={x:0}; with(o){delete x} return o.x})() evaluates to 0 instead of undefined
8047959: bindings created for declarations in eval code are not mutable
8048009: Type info caching accidentally defeated
8048071: eval within 'with' statement does not use correct scope if with scope expression has a copy of eval
8048079: Persistent code store is broken after optimistic types merge
8048505: ScriptingFunctions.readFully couldn't handle file names represented as ConsStrings
8048586: String concatenation with optimistic types is slow
8048718: JSON.parse('{"0":0, "64":0}') throws ArrayindexOutOfBoundsException
8048869: Reduce compile time by about 5% by removing the Class.casts from the AST nodes
8049086: Minor API convenience functions on "Java" object
8049222: JSType class exposes public mutable arrays
8049223: RewriteException class exposes public mutable arrays
8049242: Explicit constructor overload selection should work with StaticClass as well
8049318: Test hideLocationProperties.js fails on Window due to backslash in path
8049524: Global object initialization via javax.script API should be minimal
8050432: javax.script.filename variable should not be enumerable with nashorn engine's ENGINE_SCOPE bindings
8050964: OptimisticTypesPersistence.java should use java.util.Date instead of java.sql.Date
8051019: Separate src and test execution sandbox directories
8051346: Test262 tests for ECMAScript 5 now in branch "es5-tests"
8051439: Wrong type calculated for ADD operator with undefined operand
8051839: GuardedInvocation needs to clone an argument
8053908: jdeps is not PATH on Mac, results in ant clean test failure on Mac
8053910: ScriptObjectMirror causing havoc with Invocation interface
8053913: Auto format caused warning in CompositeTypeBasedGuardingDynamicLinker
8054223: Nashorn: AssertionError when use __DIR__ and ScriptEngine.eval()
8054411: Add nashorn.args.prepend system property
8054503: test/script/external/test262/test/suite/ch12/12.6/12.6.4/12.6.4-2.js fails with tip
8054651: Global.initConstructor and ScriptFunction.getPrototype(Object) can have stricter types
8054898: Avoid creation of empty type info files
8054993: type info cache may be disabled for test262 and tests explicitly changing that property should use @fork
8055034: jjs exits interactive mode if exception was thrown when trying to print value of last evaluated expression
8055042: Compile-time expression evaluator was missing variables
8055107: Extension directives to turn on callsite profiling, tracing, AST print and other debug features locally
8055139: test/script/trusted/JDK-8055107.js fails with access control exception
8055186: Backport Nashorn optimistic typing to 8u repository
8055529: Clean up the bin directory
Reviewed-by: jlaskey, lagergren, sundar
Contributed-by: marcus.largergren@oracle.com, hannes.wallnoefer@oracle.com, sundararajan.athijegannathan@oracle.com

attila@90 1 /*
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attila@90 26 /*
attila@90 27 * This file is available under and governed by the GNU General Public
attila@90 28 * License version 2 only, as published by the Free Software Foundation.
attila@90 29 * However, the following notice accompanied the original version of this
attila@90 30 * file, and Oracle licenses the original version of this file under the BSD
attila@90 31 * license:
attila@90 32 */
attila@90 33 /*
attila@90 34 Copyright 2009-2013 Attila Szegedi
attila@90 35
attila@90 36 Licensed under both the Apache License, Version 2.0 (the "Apache License")
attila@90 37 and the BSD License (the "BSD License"), with licensee being free to
attila@90 38 choose either of the two at their discretion.
attila@90 39
attila@90 40 You may not use this file except in compliance with either the Apache
attila@90 41 License or the BSD License.
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attila@90 43 If you choose to use this file in compliance with the Apache License, the
attila@90 44 following notice applies to you:
attila@90 45
attila@90 46 You may obtain a copy of the Apache License at
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attila@90 48 http://www.apache.org/licenses/LICENSE-2.0
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attila@90 50 Unless required by applicable law or agreed to in writing, software
attila@90 51 distributed under the License is distributed on an "AS IS" BASIS,
attila@90 52 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
attila@90 53 implied. See the License for the specific language governing
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attila@90 56 If you choose to use this file in compliance with the BSD License, the
attila@90 57 following notice applies to you:
attila@90 58
attila@90 59 Redistribution and use in source and binary forms, with or without
attila@90 60 modification, are permitted provided that the following conditions are
attila@90 61 met:
attila@90 62 * Redistributions of source code must retain the above copyright
attila@90 63 notice, this list of conditions and the following disclaimer.
attila@90 64 * Redistributions in binary form must reproduce the above copyright
attila@90 65 notice, this list of conditions and the following disclaimer in the
attila@90 66 documentation and/or other materials provided with the distribution.
attila@90 67 * Neither the name of the copyright holder nor the names of
attila@90 68 contributors may be used to endorse or promote products derived from
attila@90 69 this software without specific prior written permission.
attila@90 70
attila@90 71 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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attila@90 73 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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attila@90 75 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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attila@90 77 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
attila@90 78 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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attila@90 81 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
attila@90 82 */
attila@90 83
attila@90 84 package jdk.internal.dynalink;
attila@90 85
attila@90 86 import java.lang.invoke.MutableCallSite;
attila@488 87 import java.security.AccessController;
attila@488 88 import java.security.PrivilegedAction;
attila@90 89 import java.util.ArrayList;
attila@90 90 import java.util.Arrays;
attila@90 91 import java.util.Collections;
attila@90 92 import java.util.HashSet;
attila@90 93 import java.util.LinkedList;
attila@90 94 import java.util.List;
attila@90 95 import java.util.Set;
attila@90 96 import jdk.internal.dynalink.beans.BeansLinker;
attila@90 97 import jdk.internal.dynalink.linker.GuardingDynamicLinker;
attila@90 98 import jdk.internal.dynalink.linker.GuardingTypeConverterFactory;
attila@90 99 import jdk.internal.dynalink.linker.LinkRequest;
attila@90 100 import jdk.internal.dynalink.support.AutoDiscovery;
attila@90 101 import jdk.internal.dynalink.support.BottomGuardingDynamicLinker;
attila@494 102 import jdk.internal.dynalink.support.ClassLoaderGetterContextProvider;
attila@90 103 import jdk.internal.dynalink.support.CompositeGuardingDynamicLinker;
attila@90 104 import jdk.internal.dynalink.support.CompositeTypeBasedGuardingDynamicLinker;
attila@963 105 import jdk.internal.dynalink.support.DefaultPrelinkFilter;
attila@90 106 import jdk.internal.dynalink.support.LinkerServicesImpl;
attila@90 107 import jdk.internal.dynalink.support.TypeConverterFactory;
attila@90 108
attila@90 109 /**
attila@90 110 * A factory class for creating {@link DynamicLinker}s. The most usual dynamic linker is a linker that is a composition
attila@90 111 * of all {@link GuardingDynamicLinker}s known and pre-created by the caller as well as any
attila@963 112 * {@link AutoDiscovery automatically discovered} guarding linkers and the standard fallback {@link BeansLinker} and a
attila@963 113 * {@link DefaultPrelinkFilter}. See {@link DynamicLinker} documentation for tips on how to use this class.
attila@90 114 *
attila@90 115 * @author Attila Szegedi
attila@90 116 */
attila@90 117 public class DynamicLinkerFactory {
attila@90 118
attila@90 119 /**
attila@90 120 * Default value for {@link #setUnstableRelinkThreshold(int) unstable relink threshold}.
attila@90 121 */
attila@90 122 public static final int DEFAULT_UNSTABLE_RELINK_THRESHOLD = 8;
attila@90 123
attila@488 124 private boolean classLoaderExplicitlySet = false;
attila@488 125 private ClassLoader classLoader;
attila@488 126
attila@90 127 private List<? extends GuardingDynamicLinker> prioritizedLinkers;
attila@90 128 private List<? extends GuardingDynamicLinker> fallbackLinkers;
attila@90 129 private int runtimeContextArgCount = 0;
attila@90 130 private boolean syncOnRelink = false;
attila@90 131 private int unstableRelinkThreshold = DEFAULT_UNSTABLE_RELINK_THRESHOLD;
attila@963 132 private GuardedInvocationFilter prelinkFilter;
attila@90 133
attila@90 134 /**
attila@90 135 * Sets the class loader for automatic discovery of available linkers. If not set explicitly, then the thread
attila@488 136 * context class loader at the time of {@link #createLinker()} invocation will be used.
attila@90 137 *
attila@90 138 * @param classLoader the class loader used for the autodiscovery of available linkers.
attila@90 139 */
attila@962 140 public void setClassLoader(final ClassLoader classLoader) {
attila@90 141 this.classLoader = classLoader;
attila@488 142 classLoaderExplicitlySet = true;
attila@90 143 }
attila@90 144
attila@90 145 /**
attila@90 146 * Sets the prioritized linkers. Language runtimes using this framework will usually precreate at least the linker
attila@90 147 * for their own language. These linkers will be consulted first in the resulting dynamic linker, before any
attila@90 148 * autodiscovered linkers. If the framework also autodiscovers a linker of the same class as one of the prioritized
attila@90 149 * linkers, it will be ignored and the explicit prioritized instance will be used.
attila@90 150 *
attila@90 151 * @param prioritizedLinkers the list of prioritized linkers. Null can be passed to indicate no prioritized linkers
attila@90 152 * (this is also the default value).
attila@90 153 */
attila@962 154 public void setPrioritizedLinkers(final List<? extends GuardingDynamicLinker> prioritizedLinkers) {
attila@90 155 this.prioritizedLinkers =
attila@90 156 prioritizedLinkers == null ? null : new ArrayList<>(prioritizedLinkers);
attila@90 157 }
attila@90 158
attila@90 159 /**
attila@90 160 * Sets the prioritized linkers. Language runtimes using this framework will usually precreate at least the linker
attila@90 161 * for their own language. These linkers will be consulted first in the resulting dynamic linker, before any
attila@90 162 * autodiscovered linkers. If the framework also autodiscovers a linker of the same class as one of the prioritized
attila@90 163 * linkers, it will be ignored and the explicit prioritized instance will be used.
attila@90 164 *
attila@90 165 * @param prioritizedLinkers a list of prioritized linkers.
attila@90 166 */
attila@962 167 public void setPrioritizedLinkers(final GuardingDynamicLinker... prioritizedLinkers) {
attila@90 168 setPrioritizedLinkers(Arrays.asList(prioritizedLinkers));
attila@90 169 }
attila@90 170
attila@90 171 /**
attila@90 172 * Sets a single prioritized linker. Identical to calling {@link #setPrioritizedLinkers(List)} with a single-element
attila@90 173 * list.
attila@90 174 *
attila@90 175 * @param prioritizedLinker the single prioritized linker. Must not be null.
attila@90 176 * @throws IllegalArgumentException if null is passed.
attila@90 177 */
attila@962 178 public void setPrioritizedLinker(final GuardingDynamicLinker prioritizedLinker) {
attila@90 179 if(prioritizedLinker == null) {
attila@90 180 throw new IllegalArgumentException("prioritizedLinker == null");
attila@90 181 }
attila@90 182 this.prioritizedLinkers = Collections.singletonList(prioritizedLinker);
attila@90 183 }
attila@90 184
attila@90 185 /**
attila@90 186 * Sets the fallback linkers. These linkers will be consulted last in the resulting composite linker, after any
attila@90 187 * autodiscovered linkers. If the framework also autodiscovers a linker of the same class as one of the fallback
attila@90 188 * linkers, it will be ignored and the explicit fallback instance will be used.
attila@90 189 *
attila@90 190 * @param fallbackLinkers the list of fallback linkers. Can be empty to indicate the caller wishes to set no
attila@90 191 * fallback linkers.
attila@90 192 */
attila@962 193 public void setFallbackLinkers(final List<? extends GuardingDynamicLinker> fallbackLinkers) {
attila@90 194 this.fallbackLinkers = fallbackLinkers == null ? null : new ArrayList<>(fallbackLinkers);
attila@90 195 }
attila@90 196
attila@90 197 /**
attila@90 198 * Sets the fallback linkers. These linkers will be consulted last in the resulting composite linker, after any
attila@90 199 * autodiscovered linkers. If the framework also autodiscovers a linker of the same class as one of the fallback
attila@90 200 * linkers, it will be ignored and the explicit fallback instance will be used.
attila@90 201 *
attila@90 202 * @param fallbackLinkers the list of fallback linkers. Can be empty to indicate the caller wishes to set no
attila@90 203 * fallback linkers. If it is left as null, the standard fallback {@link BeansLinker} will be used.
attila@90 204 */
attila@962 205 public void setFallbackLinkers(final GuardingDynamicLinker... fallbackLinkers) {
attila@90 206 setFallbackLinkers(Arrays.asList(fallbackLinkers));
attila@90 207 }
attila@90 208
attila@90 209 /**
attila@90 210 * Sets the number of arguments in the call sites that represent the stack context of the language runtime creating
attila@90 211 * the linker. If the language runtime uses no context information passed on stack, then it should be zero
attila@90 212 * (the default value). If it is set to nonzero value, then every dynamic call site emitted by this runtime must
attila@90 213 * have the argument list of the form: {@code (this, contextArg1[, contextArg2[, ...]], normalArgs)}. It is
attila@90 214 * advisable to only pass one context-specific argument, though, of an easily recognizable, runtime specific type
attila@90 215 * encapsulating the runtime thread local state.
attila@90 216 *
attila@90 217 * @param runtimeContextArgCount the number of language runtime context arguments in call sites.
attila@90 218 */
attila@962 219 public void setRuntimeContextArgCount(final int runtimeContextArgCount) {
attila@90 220 if(runtimeContextArgCount < 0) {
attila@90 221 throw new IllegalArgumentException("runtimeContextArgCount < 0");
attila@90 222 }
attila@90 223 this.runtimeContextArgCount = runtimeContextArgCount;
attila@90 224 }
attila@90 225
attila@90 226 /**
attila@90 227 * Sets whether the linker created by this factory will invoke {@link MutableCallSite#syncAll(MutableCallSite[])}
attila@90 228 * after a call site is relinked. Defaults to false. You probably want to set it to true if your runtime supports
attila@90 229 * multithreaded execution of dynamically linked code.
attila@90 230 * @param syncOnRelink true for invoking sync on relink, false otherwise.
attila@90 231 */
attila@962 232 public void setSyncOnRelink(final boolean syncOnRelink) {
attila@90 233 this.syncOnRelink = syncOnRelink;
attila@90 234 }
attila@90 235
attila@90 236 /**
attila@90 237 * Sets the unstable relink threshold; the number of times a call site is relinked after which it will be
attila@90 238 * considered unstable, and subsequent link requests for it will indicate this.
attila@90 239 * @param unstableRelinkThreshold the new threshold. Must not be less than zero. The value of zero means that
attila@90 240 * call sites will never be considered unstable.
attila@90 241 * @see LinkRequest#isCallSiteUnstable()
attila@90 242 */
attila@962 243 public void setUnstableRelinkThreshold(final int unstableRelinkThreshold) {
attila@90 244 if(unstableRelinkThreshold < 0) {
attila@90 245 throw new IllegalArgumentException("unstableRelinkThreshold < 0");
attila@90 246 }
attila@90 247 this.unstableRelinkThreshold = unstableRelinkThreshold;
attila@90 248 }
attila@90 249
attila@90 250 /**
attila@963 251 * Set the pre-link filter. This is a {@link GuardedInvocationFilter} that will get the final chance to modify the
attila@963 252 * guarded invocation after it has been created by a component linker and before the dynamic linker links it into
attila@963 253 * the call site. It is normally used to adapt the return value type of the invocation to the type of the call site.
attila@963 254 * When not set explicitly, {@link DefaultPrelinkFilter} will be used.
attila@963 255 * @param prelinkFilter the pre-link filter for the dynamic linker.
attila@963 256 */
attila@963 257 public void setPrelinkFilter(final GuardedInvocationFilter prelinkFilter) {
attila@963 258 this.prelinkFilter = prelinkFilter;
attila@963 259 }
attila@963 260
attila@963 261 /**
attila@963 262 * Creates a new dynamic linker consisting of all the prioritized, autodiscovered, and fallback linkers as well as
attila@963 263 * the pre-link filter.
attila@90 264 *
attila@90 265 * @return the new dynamic Linker
attila@90 266 */
attila@90 267 public DynamicLinker createLinker() {
attila@90 268 // Treat nulls appropriately
attila@90 269 if(prioritizedLinkers == null) {
attila@90 270 prioritizedLinkers = Collections.emptyList();
attila@90 271 }
attila@90 272 if(fallbackLinkers == null) {
attila@90 273 fallbackLinkers = Collections.singletonList(new BeansLinker());
attila@90 274 }
attila@90 275
attila@90 276 // Gather classes of all precreated (prioritized and fallback) linkers.
attila@90 277 // We'll filter out any discovered linkers of the same class.
attila@101 278 final Set<Class<? extends GuardingDynamicLinker>> knownLinkerClasses =
attila@101 279 new HashSet<>();
attila@90 280 addClasses(knownLinkerClasses, prioritizedLinkers);
attila@90 281 addClasses(knownLinkerClasses, fallbackLinkers);
attila@90 282
attila@488 283 final ClassLoader effectiveClassLoader = classLoaderExplicitlySet ? classLoader : getThreadContextClassLoader();
attila@488 284 final List<GuardingDynamicLinker> discovered = AutoDiscovery.loadLinkers(effectiveClassLoader);
attila@90 285 // Now, concatenate ...
attila@101 286 final List<GuardingDynamicLinker> linkers =
attila@101 287 new ArrayList<>(prioritizedLinkers.size() + discovered.size()
attila@101 288 + fallbackLinkers.size());
attila@90 289 // ... prioritized linkers, ...
attila@90 290 linkers.addAll(prioritizedLinkers);
attila@90 291 // ... filtered discovered linkers, ...
attila@962 292 for(final GuardingDynamicLinker linker: discovered) {
attila@90 293 if(!knownLinkerClasses.contains(linker.getClass())) {
attila@90 294 linkers.add(linker);
attila@90 295 }
attila@90 296 }
attila@90 297 // ... and finally fallback linkers.
attila@90 298 linkers.addAll(fallbackLinkers);
attila@90 299 final List<GuardingDynamicLinker> optimized = CompositeTypeBasedGuardingDynamicLinker.optimize(linkers);
attila@90 300 final GuardingDynamicLinker composite;
attila@90 301 switch(linkers.size()) {
attila@90 302 case 0: {
attila@90 303 composite = BottomGuardingDynamicLinker.INSTANCE;
attila@90 304 break;
attila@90 305 }
attila@90 306 case 1: {
attila@90 307 composite = optimized.get(0);
attila@90 308 break;
attila@90 309 }
attila@90 310 default: {
attila@90 311 composite = new CompositeGuardingDynamicLinker(optimized);
attila@90 312 break;
attila@90 313 }
attila@90 314 }
attila@90 315
attila@90 316 final List<GuardingTypeConverterFactory> typeConverters = new LinkedList<>();
attila@962 317 for(final GuardingDynamicLinker linker: linkers) {
attila@90 318 if(linker instanceof GuardingTypeConverterFactory) {
attila@90 319 typeConverters.add((GuardingTypeConverterFactory)linker);
attila@90 320 }
attila@90 321 }
attila@90 322
attila@963 323 if(prelinkFilter == null) {
attila@963 324 prelinkFilter = new DefaultPrelinkFilter();
attila@963 325 }
attila@963 326
attila@90 327 return new DynamicLinker(new LinkerServicesImpl(new TypeConverterFactory(typeConverters), composite),
attila@963 328 prelinkFilter, runtimeContextArgCount, syncOnRelink, unstableRelinkThreshold);
attila@90 329 }
attila@90 330
attila@488 331 private static ClassLoader getThreadContextClassLoader() {
attila@488 332 return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
attila@488 333 @Override
attila@488 334 public ClassLoader run() {
attila@488 335 return Thread.currentThread().getContextClassLoader();
attila@488 336 }
attila@494 337 }, ClassLoaderGetterContextProvider.GET_CLASS_LOADER_CONTEXT);
attila@488 338 }
attila@488 339
attila@962 340 private static void addClasses(final Set<Class<? extends GuardingDynamicLinker>> knownLinkerClasses,
attila@962 341 final List<? extends GuardingDynamicLinker> linkers) {
attila@962 342 for(final GuardingDynamicLinker linker: linkers) {
attila@90 343 knownLinkerClasses.add(linker.getClass());
attila@90 344 }
attila@90 345 }
attila@101 346 }

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