Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/jvm/bytecode/NEW.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 |
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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.jvm.bytecode; import gov.nasa.jpf.vm.bytecode.NewInstruction; import gov.nasa.jpf.vm.ClassInfo; import gov.nasa.jpf.vm.ElementInfo; import gov.nasa.jpf.vm.Heap; import gov.nasa.jpf.vm.Instruction; import gov.nasa.jpf.vm.LoadOnJPFRequired; import gov.nasa.jpf.vm.MJIEnv; import gov.nasa.jpf.vm.StackFrame; import gov.nasa.jpf.vm.ThreadInfo; import gov.nasa.jpf.vm.Types; /** * Create new object * ... => ..., objectref */ public class NEW extends NewInstruction implements JVMInstruction { protected String cname; protected int newObjRef = MJIEnv.NULL; public NEW (String clsDescriptor){ cname = Types.getClassNameFromTypeName(clsDescriptor); } public String getClassName(){ // Needed for Java Race Finder return(cname); } @Override public Instruction execute (ThreadInfo ti) { Heap heap = ti.getHeap(); ClassInfo ci; // resolve the referenced class try { ci = ti.resolveReferencedClass(cname); } catch(LoadOnJPFRequired lre) { return ti.getPC(); } if (ci.initializeClass(ti)){ // continue with the topframe and re-exec this insn once the clinits are done return ti.getPC(); } if (heap.isOutOfMemory()) { // simulate OutOfMemoryError return ti.createAndThrowException("java.lang.OutOfMemoryError", "trying to allocate new " + cname); } ElementInfo ei = heap.newObject(ci, ti); int objRef = ei.getObjectRef(); newObjRef = objRef; // pushes the return value onto the stack StackFrame frame = ti.getModifiableTopFrame(); frame.pushRef( objRef); return getNext(ti); } @Override public int getLength() { return 3; // opcode, index1, index2 } @Override public int getByteCode () { return 0xBB; } @Override public void accept(JVMInstructionVisitor insVisitor) { insVisitor.visit(this); } public int getNewObjectRef() { return newObjRef; } @Override public String toString() { if (newObjRef != MJIEnv.NULL){ return "new " + cname + '@' + Integer.toHexString(newObjRef); } else { return "new " + cname; } } }