| /* |
| * Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.internal.runtime; |
| |
| import static jdk.nashorn.internal.lookup.Lookup.MH; |
| |
| import java.io.IOException; |
| import java.lang.invoke.MethodHandle; |
| import java.lang.invoke.MethodHandles; |
| import java.lang.invoke.MethodType; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeMap; |
| |
| import jdk.internal.dynalink.support.NameCodec; |
| import jdk.nashorn.internal.codegen.CompileUnit; |
| import jdk.nashorn.internal.codegen.Compiler; |
| import jdk.nashorn.internal.codegen.Compiler.CompilationPhases; |
| import jdk.nashorn.internal.codegen.CompilerConstants; |
| import jdk.nashorn.internal.codegen.FunctionSignature; |
| import jdk.nashorn.internal.codegen.OptimisticTypesPersistence; |
| import jdk.nashorn.internal.codegen.TypeMap; |
| import jdk.nashorn.internal.codegen.types.Type; |
| import jdk.nashorn.internal.ir.FunctionNode; |
| import jdk.nashorn.internal.ir.LexicalContext; |
| import jdk.nashorn.internal.ir.visitor.NodeVisitor; |
| import jdk.nashorn.internal.objects.Global; |
| import jdk.nashorn.internal.parser.Parser; |
| import jdk.nashorn.internal.parser.Token; |
| import jdk.nashorn.internal.parser.TokenType; |
| import jdk.nashorn.internal.runtime.logging.DebugLogger; |
| import jdk.nashorn.internal.runtime.logging.Loggable; |
| import jdk.nashorn.internal.runtime.logging.Logger; |
| |
| /** |
| * This is a subclass that represents a script function that may be regenerated, |
| * for example with specialization based on call site types, or lazily generated. |
| * The common denominator is that it can get new invokers during its lifespan, |
| * unlike {@code FinalScriptFunctionData} |
| */ |
| @Logger(name="recompile") |
| public final class RecompilableScriptFunctionData extends ScriptFunctionData implements Loggable { |
| /** Prefix used for all recompiled script classes */ |
| public static final String RECOMPILATION_PREFIX = "Recompilation$"; |
| |
| /** Unique function node id for this function node */ |
| private final int functionNodeId; |
| |
| private final String functionName; |
| |
| // TODO: try to eliminate the need for this somehow, either by allowing Source to change its name, allowing a |
| // function to internally replace its Source with one of a different name, or storing this additional field in the |
| // Source object. |
| private final String sourceURL; |
| |
| /** The line number where this function begins. */ |
| private final int lineNumber; |
| |
| /** Source from which FunctionNode was parsed. */ |
| private transient Source source; |
| |
| /** Token of this function within the source. */ |
| private final long token; |
| |
| /** Allocator map from makeMap() */ |
| private final PropertyMap allocatorMap; |
| |
| /** Code installer used for all further recompilation/specialization of this ScriptFunction */ |
| private transient CodeInstaller<ScriptEnvironment> installer; |
| |
| /** Name of class where allocator function resides */ |
| private final String allocatorClassName; |
| |
| /** lazily generated allocator */ |
| private transient MethodHandle allocator; |
| |
| private final Map<Integer, RecompilableScriptFunctionData> nestedFunctions; |
| |
| /** Id to parent function if one exists */ |
| private RecompilableScriptFunctionData parent; |
| |
| private final boolean isDeclared; |
| private final boolean isAnonymous; |
| private final boolean needsCallee; |
| |
| private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup(); |
| |
| private transient DebugLogger log; |
| |
| private final Map<String, Integer> externalScopeDepths; |
| |
| private final Set<String> internalSymbols; |
| |
| private static final int GET_SET_PREFIX_LENGTH = "*et ".length(); |
| |
| private static final long serialVersionUID = 4914839316174633726L; |
| |
| /** |
| * Constructor - public as scripts use it |
| * |
| * @param functionNode functionNode that represents this function code |
| * @param installer installer for code regeneration versions of this function |
| * @param allocatorClassName name of our allocator class, will be looked up dynamically if used as a constructor |
| * @param allocatorMap allocator map to seed instances with, when constructing |
| * @param nestedFunctions nested function map |
| * @param sourceURL source URL |
| * @param externalScopeDepths external scope depths |
| * @param internalSymbols internal symbols to method, defined in its scope |
| */ |
| public RecompilableScriptFunctionData( |
| final FunctionNode functionNode, |
| final CodeInstaller<ScriptEnvironment> installer, |
| final String allocatorClassName, |
| final PropertyMap allocatorMap, |
| final Map<Integer, RecompilableScriptFunctionData> nestedFunctions, |
| final String sourceURL, |
| final Map<String, Integer> externalScopeDepths, |
| final Set<String> internalSymbols) { |
| |
| super(functionName(functionNode), |
| Math.min(functionNode.getParameters().size(), MAX_ARITY), |
| getFlags(functionNode)); |
| |
| this.functionName = functionNode.getName(); |
| this.lineNumber = functionNode.getLineNumber(); |
| this.isDeclared = functionNode.isDeclared(); |
| this.needsCallee = functionNode.needsCallee(); |
| this.isAnonymous = functionNode.isAnonymous(); |
| this.functionNodeId = functionNode.getId(); |
| this.source = functionNode.getSource(); |
| this.token = tokenFor(functionNode); |
| this.installer = installer; |
| this.sourceURL = sourceURL; |
| this.allocatorClassName = allocatorClassName; |
| this.allocatorMap = allocatorMap; |
| this.nestedFunctions = nestedFunctions; |
| this.externalScopeDepths = externalScopeDepths; |
| this.internalSymbols = new HashSet<>(internalSymbols); |
| |
| for (final RecompilableScriptFunctionData nfn : nestedFunctions.values()) { |
| assert nfn.getParent() == null; |
| nfn.setParent(this); |
| } |
| |
| createLogger(); |
| } |
| |
| @Override |
| public DebugLogger getLogger() { |
| return log; |
| } |
| |
| @Override |
| public DebugLogger initLogger(final Context ctxt) { |
| return ctxt.getLogger(this.getClass()); |
| } |
| |
| /** |
| * Check if a symbol is internally defined in a function. For example |
| * if "undefined" is internally defined in the outermost program function, |
| * it has not been reassigned or overridden and can be optimized |
| * |
| * @param symbolName symbol name |
| * @return true if symbol is internal to this ScriptFunction |
| */ |
| |
| public boolean hasInternalSymbol(final String symbolName) { |
| return internalSymbols.contains(symbolName); |
| } |
| |
| /** |
| * Return the external symbol table |
| * @param symbolName symbol name |
| * @return the external symbol table with proto depths |
| */ |
| public int getExternalSymbolDepth(final String symbolName) { |
| final Map<String, Integer> map = externalScopeDepths; |
| if (map == null) { |
| return -1; |
| } |
| final Integer depth = map.get(symbolName); |
| if (depth == null) { |
| return -1; |
| } |
| return depth; |
| } |
| |
| /** |
| * Get the parent of this RecompilableScriptFunctionData. If we are |
| * a nested function, we have a parent. Note that "null" return value |
| * can also mean that we have a parent but it is unknown, so this can |
| * only be used for conservative assumptions. |
| * @return parent data, or null if non exists and also null IF UNKNOWN. |
| */ |
| public RecompilableScriptFunctionData getParent() { |
| return parent; |
| } |
| |
| void setParent(final RecompilableScriptFunctionData parent) { |
| this.parent = parent; |
| } |
| |
| @Override |
| String toSource() { |
| if (source != null && token != 0) { |
| return source.getString(Token.descPosition(token), Token.descLength(token)); |
| } |
| |
| return "function " + (name == null ? "" : name) + "() { [native code] }"; |
| } |
| |
| /** |
| * Initialize transient fields on deserialized instances |
| * |
| * @param src source |
| * @param inst code installer |
| */ |
| public void initTransients(final Source src, final CodeInstaller<ScriptEnvironment> inst) { |
| if (this.source == null && this.installer == null) { |
| this.source = src; |
| this.installer = inst; |
| } else if (this.source != src || this.installer != inst) { |
| // Existing values must be same as those passed as parameters |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + '@' + functionNodeId; |
| } |
| |
| @Override |
| public String toStringVerbose() { |
| final StringBuilder sb = new StringBuilder(); |
| |
| sb.append("fnId=").append(functionNodeId).append(' '); |
| |
| if (source != null) { |
| sb.append(source.getName()) |
| .append(':') |
| .append(lineNumber) |
| .append(' '); |
| } |
| |
| return sb.toString() + super.toString(); |
| } |
| |
| @Override |
| public String getFunctionName() { |
| return functionName; |
| } |
| |
| @Override |
| public boolean inDynamicContext() { |
| return (flags & IN_DYNAMIC_CONTEXT) != 0; |
| } |
| |
| private static String functionName(final FunctionNode fn) { |
| if (fn.isAnonymous()) { |
| return ""; |
| } |
| final FunctionNode.Kind kind = fn.getKind(); |
| if (kind == FunctionNode.Kind.GETTER || kind == FunctionNode.Kind.SETTER) { |
| final String name = NameCodec.decode(fn.getIdent().getName()); |
| return name.substring(GET_SET_PREFIX_LENGTH); |
| } |
| return fn.getIdent().getName(); |
| } |
| |
| private static long tokenFor(final FunctionNode fn) { |
| final int position = Token.descPosition(fn.getFirstToken()); |
| final long lastToken = Token.withDelimiter(fn.getLastToken()); |
| // EOL uses length field to store the line number |
| final int length = Token.descPosition(lastToken) - position + (Token.descType(lastToken) == TokenType.EOL ? 0 : Token.descLength(lastToken)); |
| |
| return Token.toDesc(TokenType.FUNCTION, position, length); |
| } |
| |
| private static int getFlags(final FunctionNode functionNode) { |
| int flags = IS_CONSTRUCTOR; |
| if (functionNode.isStrict()) { |
| flags |= IS_STRICT; |
| } |
| if (functionNode.needsCallee()) { |
| flags |= NEEDS_CALLEE; |
| } |
| if (functionNode.usesThis() || functionNode.hasEval()) { |
| flags |= USES_THIS; |
| } |
| if (functionNode.isVarArg()) { |
| flags |= IS_VARIABLE_ARITY; |
| } |
| if (functionNode.inDynamicContext()) { |
| flags |= IN_DYNAMIC_CONTEXT; |
| } |
| return flags; |
| } |
| |
| @Override |
| PropertyMap getAllocatorMap() { |
| return allocatorMap; |
| } |
| |
| @Override |
| ScriptObject allocate(final PropertyMap map) { |
| try { |
| ensureHasAllocator(); //if allocatorClass name is set to null (e.g. for bound functions) we don't even try |
| return allocator == null ? null : (ScriptObject)allocator.invokeExact(map); |
| } catch (final RuntimeException | Error e) { |
| throw e; |
| } catch (final Throwable t) { |
| throw new RuntimeException(t); |
| } |
| } |
| |
| private void ensureHasAllocator() throws ClassNotFoundException { |
| if (allocator == null && allocatorClassName != null) { |
| this.allocator = MH.findStatic(LOOKUP, Context.forStructureClass(allocatorClassName), CompilerConstants.ALLOCATE.symbolName(), MH.type(ScriptObject.class, PropertyMap.class)); |
| } |
| } |
| |
| FunctionNode reparse() { |
| final boolean isProgram = functionNodeId == FunctionNode.FIRST_FUNCTION_ID; |
| // NOTE: If we aren't recompiling the top-level program, we decrease functionNodeId 'cause we'll have a synthetic program node |
| final int descPosition = Token.descPosition(token); |
| final Context context = Context.getContextTrusted(); |
| final Parser parser = new Parser( |
| context.getEnv(), |
| source, |
| new Context.ThrowErrorManager(), |
| isStrict(), |
| functionNodeId - (isProgram ? 0 : 1), |
| lineNumber - 1, |
| context.getLogger(Parser.class)); // source starts at line 0, so even though lineNumber is the correct declaration line, back off one to make it exclusive |
| |
| if (isAnonymous) { |
| parser.setFunctionName(functionName); |
| } |
| |
| final FunctionNode program = parser.parse(CompilerConstants.PROGRAM.symbolName(), descPosition, Token.descLength(token), true); |
| // Parser generates a program AST even if we're recompiling a single function, so when we are only recompiling a |
| // single function, extract it from the program. |
| return (isProgram ? program : extractFunctionFromScript(program)).setName(null, functionName).setSourceURL(null, sourceURL); |
| } |
| |
| TypeMap typeMap(final MethodType fnCallSiteType) { |
| if (fnCallSiteType == null) { |
| return null; |
| } |
| |
| if (CompiledFunction.isVarArgsType(fnCallSiteType)) { |
| return null; |
| } |
| |
| return new TypeMap(functionNodeId, explicitParams(fnCallSiteType), needsCallee()); |
| } |
| |
| private static ScriptObject newLocals(final ScriptObject runtimeScope) { |
| final ScriptObject locals = Global.newEmptyInstance(); |
| locals.setProto(runtimeScope); |
| return locals; |
| } |
| |
| private Compiler getCompiler(final FunctionNode fn, final MethodType actualCallSiteType, final ScriptObject runtimeScope) { |
| return getCompiler(fn, actualCallSiteType, newLocals(runtimeScope), null, null); |
| } |
| |
| Compiler getCompiler(final FunctionNode functionNode, final MethodType actualCallSiteType, |
| final ScriptObject runtimeScope, final Map<Integer, Type> invalidatedProgramPoints, |
| final int[] continuationEntryPoints) { |
| final TypeMap typeMap = typeMap(actualCallSiteType); |
| final Object typeInformationFile = OptimisticTypesPersistence.getLocationDescriptor(source, functionNodeId, typeMap == null ? null : typeMap.getParameterTypes(functionNodeId)); |
| final Context context = Context.getContextTrusted(); |
| return new Compiler( |
| context, |
| context.getEnv(), |
| installer, |
| functionNode.getSource(), // source |
| functionNode.getSourceURL(), |
| isStrict() | functionNode.isStrict(), // is strict |
| true, // is on demand |
| this, // compiledFunction, i.e. this RecompilableScriptFunctionData |
| typeMap(actualCallSiteType), // type map |
| getEffectiveInvalidatedProgramPoints(invalidatedProgramPoints, typeInformationFile), // invalidated program points |
| typeInformationFile, |
| continuationEntryPoints, // continuation entry points |
| runtimeScope); // runtime scope |
| } |
| |
| /** |
| * If the function being compiled already has its own invalidated program points map, use it. Otherwise, attempt to |
| * load invalidated program points map from the persistent type info cache. |
| * @param invalidatedProgramPoints the function's current invalidated program points map. Null if the function |
| * doesn't have it. |
| * @param typeInformationFile the object describing the location of the persisted type information. |
| * @return either the existing map, or a loaded map from the persistent type info cache, or a new empty map if |
| * neither an existing map or a persistent cached type info is available. |
| */ |
| private static Map<Integer, Type> getEffectiveInvalidatedProgramPoints( |
| final Map<Integer, Type> invalidatedProgramPoints, final Object typeInformationFile) { |
| if(invalidatedProgramPoints != null) { |
| return invalidatedProgramPoints; |
| } |
| final Map<Integer, Type> loadedProgramPoints = OptimisticTypesPersistence.load(typeInformationFile); |
| return loadedProgramPoints != null ? loadedProgramPoints : new TreeMap<Integer, Type>(); |
| } |
| |
| private TypeSpecializedFunction compileTypeSpecialization(final MethodType actualCallSiteType, final ScriptObject runtimeScope) { |
| // We're creating an empty script object for holding local variables. AssignSymbols will populate it with |
| // explicit Undefined values for undefined local variables (see AssignSymbols#defineSymbol() and |
| // CompilationEnvironment#declareLocalSymbol()). |
| |
| if (log.isEnabled()) { |
| log.info("Type specialization of '", functionName, "' signature: ", actualCallSiteType); |
| } |
| |
| final FunctionNode fn = reparse(); |
| final Compiler compiler = getCompiler(fn, actualCallSiteType, runtimeScope); |
| |
| final FunctionNode compiledFn = compiler.compile(fn, CompilationPhases.COMPILE_ALL); |
| return new TypeSpecializedFunction(compiledFn, compiler.getInvalidatedProgramPoints()); |
| } |
| |
| private static class TypeSpecializedFunction { |
| private final FunctionNode fn; |
| private final Map<Integer, Type> invalidatedProgramPoints; |
| |
| TypeSpecializedFunction(final FunctionNode fn, final Map<Integer, Type> invalidatedProgramPoints) { |
| this.fn = fn; |
| this.invalidatedProgramPoints = invalidatedProgramPoints; |
| } |
| } |
| |
| private MethodType explicitParams(final MethodType callSiteType) { |
| if (CompiledFunction.isVarArgsType(callSiteType)) { |
| return null; |
| } |
| |
| final MethodType noCalleeThisType = callSiteType.dropParameterTypes(0, 2); // (callee, this) is always in call site type |
| final int callSiteParamCount = noCalleeThisType.parameterCount(); |
| |
| // Widen parameters of reference types to Object as we currently don't care for specialization among reference |
| // types. E.g. call site saying (ScriptFunction, Object, String) should still link to (ScriptFunction, Object, Object) |
| final Class<?>[] paramTypes = noCalleeThisType.parameterArray(); |
| boolean changed = false; |
| for (int i = 0; i < paramTypes.length; ++i) { |
| final Class<?> paramType = paramTypes[i]; |
| if (!(paramType.isPrimitive() || paramType == Object.class)) { |
| paramTypes[i] = Object.class; |
| changed = true; |
| } |
| } |
| final MethodType generalized = changed ? MethodType.methodType(noCalleeThisType.returnType(), paramTypes) : noCalleeThisType; |
| |
| if (callSiteParamCount < getArity()) { |
| return generalized.appendParameterTypes(Collections.<Class<?>>nCopies(getArity() - callSiteParamCount, Object.class)); |
| } |
| return generalized; |
| } |
| |
| private FunctionNode extractFunctionFromScript(final FunctionNode script) { |
| final Set<FunctionNode> fns = new HashSet<>(); |
| script.getBody().accept(new NodeVisitor<LexicalContext>(new LexicalContext()) { |
| @Override |
| public boolean enterFunctionNode(final FunctionNode fn) { |
| fns.add(fn); |
| return false; |
| } |
| }); |
| assert fns.size() == 1 : "got back more than one method in recompilation"; |
| final FunctionNode f = fns.iterator().next(); |
| assert f.getId() == functionNodeId; |
| if (!isDeclared && f.isDeclared()) { |
| return f.clearFlag(null, FunctionNode.IS_DECLARED); |
| } |
| return f; |
| } |
| |
| MethodHandle lookup(final FunctionNode fn) { |
| final MethodType type = new FunctionSignature(fn).getMethodType(); |
| log.info("Looking up ", DebugLogger.quote(fn.getName()), " type=", type); |
| return lookupWithExplicitType(fn, new FunctionSignature(fn).getMethodType()); |
| } |
| |
| MethodHandle lookupWithExplicitType(final FunctionNode fn, final MethodType targetType) { |
| return lookupCodeMethod(fn.getCompileUnit(), targetType); |
| } |
| |
| private MethodHandle lookupCodeMethod(final CompileUnit compileUnit, final MethodType targetType) { |
| return MH.findStatic(LOOKUP, compileUnit.getCode(), functionName, targetType); |
| } |
| |
| /** |
| * Initializes this function data with the eagerly generated version of the code. This method can only be invoked |
| * by the compiler internals in Nashorn and is public for implementation reasons only. Attempting to invoke it |
| * externally will result in an exception. |
| * @param functionNode the functionNode belonging to this data |
| */ |
| public void initializeCode(final FunctionNode functionNode) { |
| // Since the method is public, we double-check that we aren't invoked with an inappropriate compile unit. |
| if(!(code.isEmpty() && functionNode.getCompileUnit().isInitializing(this, functionNode))) { |
| throw new IllegalStateException(functionNode.getName() + " id=" + functionNode.getId()); |
| } |
| addCode(functionNode); |
| } |
| |
| private CompiledFunction addCode(final MethodHandle target, final Map<Integer, Type> invalidatedProgramPoints, final int fnFlags) { |
| final CompiledFunction cfn = new CompiledFunction(target, this, invalidatedProgramPoints, fnFlags); |
| code.add(cfn); |
| return cfn; |
| } |
| |
| private CompiledFunction addCode(final FunctionNode fn) { |
| return addCode(lookup(fn), null, fn.getFlags()); |
| } |
| |
| /** |
| * Add code with specific call site type. It will adapt the type of the looked up method handle to fit the call site |
| * type. This is necessary because even if we request a specialization that takes an "int" parameter, we might end |
| * up getting one that takes a "double" etc. because of internal function logic causes widening (e.g. assignment of |
| * a wider value to the parameter variable). However, we use the method handle type for matching subsequent lookups |
| * for the same specialization, so we must adapt the handle to the expected type. |
| * @param tfn the function |
| * @param callSiteType the call site type |
| * @return the compiled function object, with its type matching that of the call site type. |
| */ |
| private CompiledFunction addCode(final TypeSpecializedFunction tfn, final MethodType callSiteType) { |
| final FunctionNode fn = tfn.fn; |
| if (fn.isVarArg()) { |
| return addCode(fn); |
| } |
| |
| final MethodHandle handle = lookup(fn); |
| final MethodType fromType = handle.type(); |
| MethodType toType = needsCallee(fromType) ? callSiteType.changeParameterType(0, ScriptFunction.class) : callSiteType.dropParameterTypes(0, 1); |
| toType = toType.changeReturnType(fromType.returnType()); |
| |
| final int toCount = toType.parameterCount(); |
| final int fromCount = fromType.parameterCount(); |
| final int minCount = Math.min(fromCount, toCount); |
| for(int i = 0; i < minCount; ++i) { |
| final Class<?> fromParam = fromType.parameterType(i); |
| final Class<?> toParam = toType.parameterType(i); |
| // If method has an Object parameter, but call site had String, preserve it as Object. No need to narrow it |
| // artificially. Note that this is related to how CompiledFunction.matchesCallSite() works, specifically |
| // the fact that various reference types compare to equal (see "fnType.isEquivalentTo(csType)" there). |
| if (fromParam != toParam && !fromParam.isPrimitive() && !toParam.isPrimitive()) { |
| assert fromParam.isAssignableFrom(toParam); |
| toType = toType.changeParameterType(i, fromParam); |
| } |
| } |
| if (fromCount > toCount) { |
| toType = toType.appendParameterTypes(fromType.parameterList().subList(toCount, fromCount)); |
| } else if (fromCount < toCount) { |
| toType = toType.dropParameterTypes(fromCount, toCount); |
| } |
| |
| return addCode(lookup(fn).asType(toType), tfn.invalidatedProgramPoints, fn.getFlags()); |
| } |
| |
| |
| @Override |
| CompiledFunction getBest(final MethodType callSiteType, final ScriptObject runtimeScope) { |
| synchronized (code) { |
| CompiledFunction existingBest = super.getBest(callSiteType, runtimeScope); |
| if (existingBest == null) { |
| existingBest = addCode(compileTypeSpecialization(callSiteType, runtimeScope), callSiteType); |
| } |
| |
| assert existingBest != null; |
| //we are calling a vararg method with real args |
| boolean applyToCall = existingBest.isVarArg() && !CompiledFunction.isVarArgsType(callSiteType); |
| |
| //if the best one is an apply to call, it has to match the callsite exactly |
| //or we need to regenerate |
| if (existingBest.isApplyToCall()) { |
| final CompiledFunction best = code.lookupExactApplyToCall(callSiteType); |
| if (best != null) { |
| return best; |
| } |
| applyToCall = true; |
| } |
| |
| if (applyToCall) { |
| final TypeSpecializedFunction tfn = compileTypeSpecialization(callSiteType, runtimeScope); |
| if (tfn.fn.hasOptimisticApplyToCall()) { //did the specialization work |
| existingBest = addCode(tfn, callSiteType); |
| } |
| } |
| |
| return existingBest; |
| } |
| } |
| |
| @Override |
| boolean isRecompilable() { |
| return true; |
| } |
| |
| @Override |
| public boolean needsCallee() { |
| return needsCallee; |
| } |
| |
| @Override |
| MethodType getGenericType() { |
| // 2 is for (callee, this) |
| if (isVariableArity()) { |
| return MethodType.genericMethodType(2, true); |
| } |
| return MethodType.genericMethodType(2 + getArity()); |
| } |
| |
| /** |
| * Return a script function data based on a function id, either this function if |
| * the id matches or a nested function based on functionId. This goes down into |
| * nested functions until all leaves are exhausted. |
| * |
| * @param functionId function id |
| * @return script function data or null if invalid id |
| */ |
| public RecompilableScriptFunctionData getScriptFunctionData(final int functionId) { |
| if (functionId == functionNodeId) { |
| return this; |
| } |
| RecompilableScriptFunctionData data; |
| |
| data = nestedFunctions == null ? null : nestedFunctions.get(functionId); |
| if (data != null) { |
| return data; |
| } |
| for (final RecompilableScriptFunctionData ndata : nestedFunctions.values()) { |
| data = ndata.getScriptFunctionData(functionId); |
| if (data != null) { |
| return data; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Get the uppermost parent, the program, for this data |
| * @return program |
| */ |
| public RecompilableScriptFunctionData getProgram() { |
| RecompilableScriptFunctionData program = this; |
| while (true) { |
| final RecompilableScriptFunctionData p = program.getParent(); |
| if (p == null) { |
| return program; |
| } |
| program = p; |
| } |
| } |
| |
| /** |
| * Check whether a certain name is a global symbol, i.e. only exists as defined |
| * in outermost scope and not shadowed by being parameter or assignment in inner |
| * scopes |
| * |
| * @param functionNode function node to check |
| * @param symbolName symbol name |
| * @return true if global symbol |
| */ |
| public boolean isGlobalSymbol(final FunctionNode functionNode, final String symbolName) { |
| RecompilableScriptFunctionData data = getScriptFunctionData(functionNode.getId()); |
| assert data != null; |
| |
| do { |
| if (data.hasInternalSymbol(symbolName)) { |
| return false; |
| } |
| data = data.getParent(); |
| } while(data != null); |
| |
| return true; |
| } |
| |
| private void readObject(final java.io.ObjectInputStream in) throws IOException, ClassNotFoundException { |
| in.defaultReadObject(); |
| createLogger(); |
| } |
| |
| private void createLogger() { |
| log = initLogger(Context.getContextTrusted()); |
| } |
| } |
