1/* 2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25package sun.jvm.hotspot.debugger.bsd.x86; 26 27import sun.jvm.hotspot.debugger.*; 28import sun.jvm.hotspot.debugger.bsd.*; 29import sun.jvm.hotspot.debugger.cdbg.*; 30import sun.jvm.hotspot.debugger.cdbg.basic.*; 31import sun.jvm.hotspot.debugger.x86.*; 32 33final public class BsdX86CFrame extends BasicCFrame { 34 // package/class internals only 35 public BsdX86CFrame(BsdDebugger dbg, Address ebp, Address pc) { 36 super(dbg.getCDebugger()); 37 this.ebp = ebp; 38 this.pc = pc; 39 this.dbg = dbg; 40 } 41 42 // override base class impl to avoid ELF parsing 43 public ClosestSymbol closestSymbolToPC() { 44 // try native lookup in debugger. 45 return dbg.lookup(dbg.getAddressValue(pc())); 46 } 47 48 public Address pc() { 49 return pc; 50 } 51 52 public Address localVariableBase() { 53 return ebp; 54 } 55 56 public CFrame sender(ThreadProxy thread) { 57 X86ThreadContext context = (X86ThreadContext) thread.getContext(); 58 Address esp = context.getRegisterAsAddress(X86ThreadContext.ESP); 59 60 if ( (ebp == null) || ebp.lessThan(esp) ) { 61 return null; 62 } 63 64 Address nextEBP = ebp.getAddressAt( 0 * ADDRESS_SIZE); 65 if (nextEBP == null) { 66 return null; 67 } 68 Address nextPC = ebp.getAddressAt( 1 * ADDRESS_SIZE); 69 if (nextPC == null) { 70 return null; 71 } 72 return new BsdX86CFrame(dbg, nextEBP, nextPC); 73 } 74 75 private static final int ADDRESS_SIZE = 4; 76 private Address pc; 77 private Address ebp; 78 private BsdDebugger dbg; 79} 80