Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/util/json/JSONObject.java @ 23:db918c531e6d
streamlined class init, which was a mixed case of registerClass()/initializeClass() and pushRequiredClinits(). Now it is a single initializeClass(ti) method which combines the previous initializeClass(), pushRequiredClinits() and pushClinit() methods. The reason for combining these is the forthcoming replacement of separately locked clinits from different DirectCallStackFrames with a single synthetic frame that calls clinits from nested synchronized blocks. This is required to model hotspot, which does cause deadlocks with concurrent init of classes that cause subclass init during their clinit executions.
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Wed, 15 Apr 2015 22:40:21 -0700 |
parents | 61d41facf527 |
children | 6774e2e08d37 |
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/* * Copyright (C) 2014, United States Government, as represented by the * Administrator of the National Aeronautics and Space Administration. * All rights reserved. * * The Java Pathfinder core (jpf-core) platform is licensed under the * Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0. * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package gov.nasa.jpf.util.json; import gov.nasa.jpf.JPF; import gov.nasa.jpf.JPFException; import gov.nasa.jpf.util.JPFLogger; import gov.nasa.jpf.util.ObjectConverter; import gov.nasa.jpf.vm.ChoiceGenerator; import gov.nasa.jpf.vm.ClassInfo; import gov.nasa.jpf.vm.ClinitRequired; import gov.nasa.jpf.vm.ElementInfo; import gov.nasa.jpf.vm.FieldInfo; import gov.nasa.jpf.vm.Fields; import gov.nasa.jpf.vm.MJIEnv; import gov.nasa.jpf.vm.ThreadInfo; import java.util.HashMap; import java.util.Set; /** * Object parsed from JSON document. * @author Ivan Mushketik */ public class JSONObject{ private static final JPFLogger logger = JPF.getLogger("gov.nasa.jpf.util.json.JSONObject"); private HashMap<String, Value> keyValues = new HashMap<String, Value>(); private HashMap<String, CGCall> cgCalls = new HashMap<String, CGCall>(); void addValue(String key, Value value) { if (keyValues.containsKey(key)) { throw new JPFException("Attempt to add two nodes with the same key in JSON object"); } keyValues.put(key, value); } /** * Get value read from JSON document with specified key. * @param key - value's key. * @return read value. */ public Value getValue(String key) { return keyValues.get(key); } public String[] getValuesKeys() { Set<String> valuesKeys = keyValues.keySet(); String[] result = new String[keyValues.size()]; valuesKeys.toArray(result); return result; } public void addCGCall(String key, CGCall cgCall) { if (cgCalls.containsKey(key)) { throw new JPFException("Attempt to add two CG with the same key in JSON object"); } cgCalls.put(key, cgCall); } public CGCall getCGCall(String key) { return cgCalls.get(key); } public String[] getCGCallsKeys() { Set<String> cgKeys = cgCalls.keySet(); String[] result = new String[cgKeys.size()]; cgKeys.toArray(result); return result; } /** * check if all required ClassInfos for this object have been initialized so * that the caller can decide if it has to re-execute before proceeding * * NOTE - this currently does not support concrete field types that are subtypes * of the respective field types */ public boolean requiresClinitExecution (ClassInfo ci, ThreadInfo ti){ while (ci != null){ if (ci.initializeClass(ti)){ return true; } for (FieldInfo fi : ci.getDeclaredInstanceFields()) { ClassInfo ciField = fi.getTypeClassInfo(); if (requiresClinitExecution(ciField, ti)){ return true; } } ci = ci.getSuperClass(); } return false; } //--- the fillers // NOTE - (pcm) before calling this method you have to make sure all required // types are initialized public int fillObject (MJIEnv env, ClassInfo ci, ChoiceGenerator<?>[] cgs, String prefix) throws ClinitRequired { int newObjRef = env.newObject(ci); ElementInfo ei = env.getHeap().getModifiable(newObjRef); // Fill all fields for this class until it has a super class while (ci != null) { FieldInfo[] fields = ci.getDeclaredInstanceFields(); for (FieldInfo fi : fields) { String fieldName = fi.getName(); Value val = getValue(fieldName); CGCall cgCall = getCGCall(fieldName); // If a value was defined in JSON document if (val != null) { fillFromValue(fi, ei, val, env, cgs, prefix); } else if (cgCall != null) { // Value of this field should be taken from CG String cgId = prefix + fieldName; ChoiceGenerator<?> cg = getCGByID(cgs, cgId); assert cg != null : "Expected CG with id " + cgId; Object cgResult = cg.getNextChoice(); if (!fi.isReference()) { convertPrimititve(ei, fi, cgResult); } else { int newFieldRef = ObjectConverter.JPFObjectFromJavaObject(env, cgResult); ei.setReferenceField(fi, newFieldRef); } } else { logger.warning("Value for field ", fi.getFullName(), " isn't specified"); } } ci = ci.getSuperClass(); } return newObjRef; } private void fillFromValue(FieldInfo fi, ElementInfo ei, Value val, MJIEnv env, ChoiceGenerator<?>[] cgs, String prefix) { String fieldName = fi.getName(); // Handle primitive types if (!fi.isReference()) { fillPrimitive(ei, fi, val); } else { if (isArrayType(fi.getType())) { int newArrRef = createArray(env, fi.getTypeClassInfo(), val, cgs, prefix + fieldName); ei.setReferenceField(fi, newArrRef); } else { Creator creator = CreatorsFactory.getCreator(fi.getType()); if (creator != null) { int newSubObjRef = creator.create(env, fi.getType(), val); ei.setReferenceField(fi, newSubObjRef); } else { // Not a special case. Fill it recursively ClassInfo ciField = fi.getTypeClassInfo(); if (ciField.initializeClass(env.getThreadInfo())){ throw new ClinitRequired(ciField); } JSONObject jsonObj = val.getObject(); int fieldRef = MJIEnv.NULL; if (jsonObj != null) { fieldRef = jsonObj.fillObject(env, ciField, cgs, prefix + fieldName); } ei.setReferenceField(fi.getName(), fieldRef); } } } } private static void fillPrimitive(ElementInfo ei, FieldInfo fi, Value val) { String primitiveName = fi.getType(); if (primitiveName.equals("boolean")) { ei.setBooleanField(fi, val.getBoolean()); } else if (primitiveName.equals("byte")) { ei.setByteField(fi, val.getDouble().byteValue()); } else if (primitiveName.equals("short")) { ei.setShortField(fi, val.getDouble().shortValue()); } else if (primitiveName.equals("int")) { ei.setIntField(fi, val.getDouble().intValue()); } else if (primitiveName.equals("long")) { ei.setLongField(fi, val.getDouble().longValue()); } else if (primitiveName.equals("float")) { ei.setFloatField(fi, val.getDouble().floatValue()); } else if (primitiveName.equals("double")) { ei.setDoubleField(fi, val.getDouble()); } } public int createArray(MJIEnv env, ClassInfo ciArray, Value value, ChoiceGenerator<?>[] cgs, String prefix) { Value vals[] = value.getArray(); ClassInfo ciElement = ciArray.getComponentClassInfo(); String arrayElementType = ciElement.getName(); int arrayRef; // Handle arrays of primitive types if (arrayElementType.equals("boolean")) { arrayRef = env.newBooleanArray(vals.length); ElementInfo arrayEI = env.getHeap().getModifiable(arrayRef); boolean bools[] = arrayEI.asBooleanArray(); for (int i = 0; i < vals.length; i++) { bools[i] = vals[i].getBoolean(); } } else if (arrayElementType.equals("byte")) { arrayRef = env.newByteArray(vals.length); ElementInfo arrayEI = env.getHeap().getModifiable(arrayRef); byte bytes[] = arrayEI.asByteArray(); for (int i = 0; i < vals.length; i++) { bytes[i] = vals[i].getDouble().byteValue(); } } else if (arrayElementType.equals("short")) { arrayRef = env.newShortArray(vals.length); ElementInfo arrayEI = env.getHeap().getModifiable(arrayRef); short shorts[] = arrayEI.asShortArray(); for (int i = 0; i < vals.length; i++) { shorts[i] = vals[i].getDouble().shortValue(); } } else if (arrayElementType.equals("int")) { arrayRef = env.newIntArray(vals.length); ElementInfo arrayEI = env.getHeap().getModifiable(arrayRef); int[] ints = arrayEI.asIntArray(); for (int i = 0; i < vals.length; i++) { ints[i] = vals[i].getDouble().intValue(); } } else if (arrayElementType.equals("long")) { arrayRef = env.newLongArray(vals.length); ElementInfo arrayEI = env.getHeap().getModifiable(arrayRef); long[] longs = arrayEI.asLongArray(); for (int i = 0; i < vals.length; i++) { longs[i] = vals[i].getDouble().longValue(); } } else if (arrayElementType.equals("float")) { arrayRef = env.newFloatArray(vals.length); ElementInfo arrayEI = env.getHeap().getModifiable(arrayRef); float[] floats = arrayEI.asFloatArray(); for (int i = 0; i < vals.length; i++) { floats[i] = vals[i].getDouble().floatValue(); } } else if (arrayElementType.equals("double")) { arrayRef = env.newDoubleArray(vals.length); ElementInfo arrayEI = env.getHeap().getModifiable(arrayRef); double[] doubles = arrayEI.asDoubleArray(); for (int i = 0; i < vals.length; i++) { doubles[i] = vals[i].getDouble(); } } else { // Not an array of primitive types arrayRef = env.newObjectArray(arrayElementType, vals.length); ElementInfo arrayEI = env.getModifiableElementInfo(arrayRef); Fields fields = arrayEI.getFields(); Creator creator = CreatorsFactory.getCreator(arrayElementType); for (int i = 0; i < vals.length; i++) { int newObjRef; if (creator != null) { newObjRef = creator.create(env, arrayElementType, vals[i]); } else{ if (isArrayType(arrayElementType)) { newObjRef = createArray(env, ciElement, vals[i], cgs, prefix + "[" + i); } else { JSONObject jsonObj = vals[i].getObject(); if (jsonObj != null) { newObjRef = jsonObj.fillObject(env, ciElement, cgs, prefix + "[" + i); } else { newObjRef = MJIEnv.NULL; } } } fields.setReferenceValue(i, newObjRef); } } return arrayRef; } private boolean isArrayType(String typeName) { return typeName.lastIndexOf('[') >= 0; } /** * This is method is used to set field of primitive type from CG result object * @param ei - ElementInfo to set field in * @param fi - FieldInfo of a field we want to set * @param cgResult - result of CG call */ private void convertPrimititve(ElementInfo ei, FieldInfo fi, Object cgResult) { String primitiveName = fi.getType(); if (primitiveName.equals("boolean") && cgResult instanceof Boolean) { Boolean bool = (Boolean) cgResult; ei.setBooleanField(fi, bool.booleanValue()); } else if (cgResult instanceof Number) { Number number = (Number) cgResult; if (primitiveName.equals("byte")) { ei.setByteField(fi, number.byteValue()); } else if (primitiveName.equals("short")) { ei.setShortField(fi, number.shortValue()); } else if (primitiveName.equals("int")) { ei.setIntField(fi, number.intValue()); } else if (primitiveName.equals("long")) { ei.setLongField(fi, number.longValue()); } else if (primitiveName.equals("float")) { ei.setFloatField(fi, number.floatValue()); } else if (primitiveName.equals("double")) { ei.setDoubleField(fi, number.doubleValue()); } } else if (cgResult instanceof Character) { Character c = (Character) cgResult; ei.setCharField(fi, c); } else { throw new JPFException("Can't convert " + cgResult.getClass().getCanonicalName() + " to " + primitiveName); } } /** * Get CG from current state CG list by it's ID * @param cgs - array of CG from current state * @param id - id of the CG that we search for * @return - CG with a specified id or null if no id with such name found */ private ChoiceGenerator<?> getCGByID(ChoiceGenerator<?>[] cgs, String id) { if (cgs == null) { return null; } for (int i = 0; i < cgs.length; i++) { if (cgs[i].getId().equals(id)) { return cgs[i]; } } return null; } }