| /* |
| * Copyright (c) 1998, 2017, 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 com.sun.tools.jdi; |
| |
| import com.sun.jdi.AbsentInformationException; |
| import com.sun.jdi.ClassNotLoadedException; |
| import com.sun.jdi.InternalException; |
| import com.sun.jdi.LocalVariable; |
| import com.sun.jdi.Location; |
| import com.sun.jdi.Method; |
| import com.sun.jdi.StackFrame; |
| import com.sun.jdi.Type; |
| import com.sun.jdi.VirtualMachine; |
| |
| 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 String genericSignature = null; |
| |
| 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; |
| if (genericSignature != null && genericSignature.length() > 0) { |
| this.genericSignature = genericSignature; |
| } else { |
| // The Spec says to return null for non-generic types |
| this.genericSignature = null; |
| } |
| } |
| |
| public boolean equals(Object obj) { |
| if ((obj != null) && (obj instanceof LocalVariableImpl)) { |
| LocalVariableImpl other = (LocalVariableImpl)obj; |
| return ((slot() == other.slot()) && |
| (scopeStart != null) && |
| (scopeStart.equals(other.scopeStart)) && |
| (super.equals(obj))); |
| } else { |
| return false; |
| } |
| } |
| |
| public int hashCode() { |
| /* |
| * TO DO: Better hash code |
| */ |
| return ((scopeStart.hashCode() << 4) + slot()); |
| } |
| |
| public int compareTo(LocalVariable object) { |
| LocalVariableImpl other = (LocalVariableImpl)object; |
| |
| int rc = scopeStart.compareTo(other.scopeStart); |
| 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 new InternalException(); |
| } |
| } |
| |
| 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(); |
| } |
| } |