Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/jdi/LocalVariableImpl.java @ 19491:4d66c000d253
Truffle/Instrumentation: more cleanup in Probe
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
---|---|
date | Wed, 18 Feb 2015 18:30:49 -0800 |
parents | 37be97a58393 |
children |
line wrap: on
line source
/* * Copyright (c) 2002, 2011, 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. * * 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 sun.jvm.hotspot.jdi; import com.sun.jdi.*; public class LocalVariableImpl extends MirrorImpl implements LocalVariable, ValueContainer { private final Method method; private final int slot; private final Location scopeStart; private final Location scopeEnd; private final String name; private final String signature; private final String genericSignature; LocalVariableImpl(VirtualMachine vm, Method method, int slot, Location scopeStart, Location scopeEnd, String name, String signature, String genericSignature) { super(vm); this.method = method; this.slot = slot; this.scopeStart = scopeStart; this.scopeEnd = scopeEnd; this.name = name; this.signature = signature; this.genericSignature = genericSignature; } public boolean equals(Object obj) { if ((obj != null) && (obj instanceof LocalVariableImpl)) { LocalVariableImpl other = (LocalVariableImpl)obj; return (method.equals(other.method) && slot() == other.slot() && super.equals(obj)); } else { return false; } } public int hashCode() { /* * TO DO: Better hash code */ return (int)method.hashCode() + slot(); } public int compareTo(LocalVariable localVar) { LocalVariableImpl other = (LocalVariableImpl) localVar; int rc = method.compareTo(other.method); if (rc == 0) { rc = slot() - other.slot(); } return rc; } public String name() { return name; } /** * @return a text representation of the declared type * of this variable. */ public String typeName() { JNITypeParser parser = new JNITypeParser(signature); return parser.typeName(); } public Type type() throws ClassNotLoadedException { return findType(signature()); } public Type findType(String signature) throws ClassNotLoadedException { ReferenceTypeImpl enclosing = (ReferenceTypeImpl)method.declaringType(); return enclosing.findType(signature); } public String signature() { return signature; } public String genericSignature() { return genericSignature; } public boolean isVisible(StackFrame frame) { //validateMirror(frame); Method frameMethod = frame.location().method(); if (!frameMethod.equals(method)) { throw new IllegalArgumentException( "frame method different than variable's method"); } // this is here to cover the possibility that we will // allow LocalVariables for native methods. If we do // so we will have to re-examinine this. if (frameMethod.isNative()) { return false; } return ((scopeStart.compareTo(frame.location()) <= 0) && (scopeEnd.compareTo(frame.location()) >= 0)); } public boolean isArgument() { try { MethodImpl method = (MethodImpl)scopeStart.method(); return (slot < method.argSlotCount()); } catch (AbsentInformationException e) { // If this variable object exists, there shouldn't be absent info throw (InternalException) new InternalException().initCause(e); } } int slot() { return slot; } /* * Compilers/VMs can have byte code ranges for variables of the * same names that overlap. This is because the byte code ranges * aren't necessarily scopes; they may have more to do with the * lifetime of the variable's slot, depending on implementation. * * This method determines whether this variable hides an * identically named variable; ie, their byte code ranges overlap * this one starts after the given one. If it returns true this * variable should be preferred when looking for a single variable * with its name when both variables are visible. */ boolean hides(LocalVariable other) { LocalVariableImpl otherImpl = (LocalVariableImpl)other; if (!method.equals(otherImpl.method) || !name.equals(otherImpl.name)) { return false; } else { return (scopeStart.compareTo(otherImpl.scopeStart) > 0); } } public String toString() { return name() + " in " + method.toString() + "@" + scopeStart.toString(); } }