1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package jdk.test.lib.jittester.factories;
  25 
  26 import java.util.ArrayList;
  27 import java.util.Collection;
  28 import java.util.List;
  29 
  30 import jdk.test.lib.jittester.ProductionFailedException;
  31 import jdk.test.lib.jittester.Symbol;
  32 import jdk.test.lib.jittester.SymbolTable;
  33 import jdk.test.lib.jittester.Type;
  34 import jdk.test.lib.jittester.TypeList;
  35 import jdk.test.lib.jittester.VariableInfo;
  36 import jdk.test.lib.jittester.functions.ArgumentDeclaration;
  37 import jdk.test.lib.jittester.functions.FunctionDeclaration;
  38 import jdk.test.lib.jittester.functions.FunctionDefinition;
  39 import jdk.test.lib.jittester.functions.FunctionInfo;
  40 import jdk.test.lib.jittester.types.TypeKlass;
  41 import jdk.test.lib.jittester.utils.PseudoRandom;
  42 
  43 class FunctionDeclarationFactory extends Factory<FunctionDeclaration> {
  44     private final Type resultType;
  45     private final TypeKlass ownerClass;
  46     private final String name;
  47     private final int memberFunctionsArgLimit;
  48     private final int flags;
  49 
  50     FunctionDeclarationFactory(String name, TypeKlass ownerClass, Type resultType,
  51             int memberFunctionsArgLimit, int flags) {
  52         this.name = name;
  53         this.ownerClass = ownerClass;
  54         this.resultType = resultType;
  55         this.memberFunctionsArgLimit = memberFunctionsArgLimit;
  56         this.flags = flags;
  57     }
  58 
  59     @Override
  60     public FunctionDeclaration produce() throws ProductionFailedException {
  61         Type resType = resultType;
  62         if (resType == null) {
  63             List<Type> types = new ArrayList<>(TypeList.getAll());
  64             types.add(TypeList.VOID);
  65             resType = PseudoRandom.randomElement(types);
  66         }
  67         int argNumber = (int) (PseudoRandom.random() * memberFunctionsArgLimit);
  68         ArrayList<VariableInfo> argumentsInfo = new ArrayList<>(argNumber + 1);
  69         argumentsInfo.add(new VariableInfo("this", ownerClass, ownerClass,
  70                 VariableInfo.FINAL | VariableInfo.LOCAL | VariableInfo.INITIALIZED));
  71         ArrayList<ArgumentDeclaration> argumentsDeclaration = new ArrayList<>(argNumber);
  72         SymbolTable.push();
  73         FunctionInfo functionInfo;
  74         IRNodeBuilder builder = new IRNodeBuilder().setArgumentType(ownerClass);
  75         try {
  76             int i = 0;
  77             for (; i < argNumber; i++) {
  78                 ArgumentDeclaration d = builder.setVariableNumber(i)
  79                         .getArgumentDeclarationFactory().produce();
  80                 argumentsDeclaration.add(d);
  81                 argumentsInfo.add(d.variableInfo);
  82             }
  83             Collection<Symbol> thisKlassFuncs = SymbolTable
  84                     .getAllCombined(ownerClass, FunctionInfo.class);
  85             Collection<Symbol> parentFuncs = FunctionDefinition.getFuncsFromParents(ownerClass);
  86             while (true) {
  87                 functionInfo = new FunctionInfo(name, ownerClass, resType, 0, flags, argumentsInfo);
  88                 if (thisKlassFuncs.contains(functionInfo)
  89                         || FunctionDefinition.isInvalidOverride(functionInfo, parentFuncs)) {
  90                     // try changing the signature, and go checking again.
  91                     ArgumentDeclaration d = builder.setVariableNumber(i++)
  92                             .getArgumentDeclarationFactory().produce();
  93                     argumentsDeclaration.add(d);
  94                     argumentsInfo.add(d.variableInfo);
  95                 } else {
  96                     break;
  97                 }
  98             }
  99         } finally {
 100             SymbolTable.pop();
 101         }
 102         //addChildren(argumentsDeclaration); // not neccessary while complexity is 0
 103         functionInfo = new FunctionInfo(name, ownerClass, resType, 0, flags, argumentsInfo);
 104         // If it's all ok, add the function to the symbol table.
 105         SymbolTable.add(functionInfo);
 106         return new FunctionDeclaration(functionInfo, argumentsDeclaration);
 107     }
 108 }