| /* |
| * Copyright (c) 2003, 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.runtime.ia64; |
| |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.debugger.ia64.*; |
| import sun.jvm.hotspot.code.*; |
| import sun.jvm.hotspot.interpreter.*; |
| import sun.jvm.hotspot.runtime.*; |
| |
| /** <P> Should be able to be used on all ia64 platforms we support |
| (Win32, Linux) to implement JavaThread's |
| "currentFrameGuess()" functionality. Input is an IA64ThreadContext; |
| output is SP, FP, and PC for an IA64Frame. Instantiation of the |
| IA64Frame is left to the caller, since we may need to subclass |
| IA64Frame to support signal handler frames on Unix platforms. </P> |
| |
| <P> This is pretty much impossible on ia64. |
| </P> */ |
| |
| public class IA64CurrentFrameGuess { |
| private IA64ThreadContext context; |
| private JavaThread thread; |
| private Address spFound; |
| private Address fpFound; |
| private Address pcFound; |
| |
| private static final boolean DEBUG = false; |
| |
| public IA64CurrentFrameGuess(IA64ThreadContext context, |
| JavaThread thread) { |
| this.context = context; |
| this.thread = thread; |
| } |
| |
| /** Returns false if not able to find a frame within a reasonable range. */ |
| public boolean run(long regionInBytesToSearch) { |
| /* |
| Without using the stack walking library this is not possible on ia64. |
| There is also the issue of walking dynamic code where there is no |
| stack walking info generated. |
| */ |
| return false; |
| } |
| |
| public Address getSP() { return null; } |
| public Address getFP() { return null; } |
| /** May be null if getting values from thread-local storage; take |
| care to call the correct IA64Frame constructor to recover this if |
| necessary */ |
| public Address getPC() { return null; } |
| |
| private void setValues(Address sp, Address fp, Address pc) { |
| spFound = sp; |
| fpFound = fp; |
| pcFound = pc; |
| } |
| } |