1 /* 2 * Copyright (c) 2003, 2013, 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 25 package sun.jvm.hotspot.debugger.linux.amd64; 26 27 import sun.jvm.hotspot.debugger.*; 28 import sun.jvm.hotspot.debugger.amd64.*; 29 import sun.jvm.hotspot.debugger.linux.*; 30 import sun.jvm.hotspot.debugger.cdbg.*; 31 import sun.jvm.hotspot.debugger.cdbg.basic.*; 32 33 final public class LinuxAMD64CFrame extends BasicCFrame { 34 public LinuxAMD64CFrame(LinuxDebugger dbg, Address rbp, Address rip) { 35 super(dbg.getCDebugger()); 36 this.rbp = rbp; 37 this.rip = rip; 38 this.dbg = dbg; 39 } 40 41 // override base class impl to avoid ELF parsing 42 public ClosestSymbol closestSymbolToPC() { 43 // try native lookup in debugger. 44 return dbg.lookup(dbg.getAddressValue(pc())); 45 } 46 47 public Address pc() { 48 return rip; 49 } 50 51 public Address localVariableBase() { 52 return rbp; 53 } 54 55 public CFrame sender(ThreadProxy thread) { 56 AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext(); 57 Address rsp = context.getRegisterAsAddress(AMD64ThreadContext.RSP); 58 59 if ( (rbp == null) || rbp.lessThan(rsp) ) { 60 return null; 61 } 62 63 // Check alignment of rbp 64 if ( dbg.getAddressValue(rbp) % ADDRESS_SIZE != 0) { 65 return null; 66 } 67 68 Address nextRBP = rbp.getAddressAt( 0 * ADDRESS_SIZE); 69 if (nextRBP == null || nextRBP.lessThanOrEqual(rbp)) { 70 return null; 71 } 72 Address nextPC = rbp.getAddressAt( 1 * ADDRESS_SIZE); 73 if (nextPC == null) { 74 return null; 75 } 76 return new LinuxAMD64CFrame(dbg, nextRBP, nextPC); 77 } 78 79 // package/class internals only 80 private static final int ADDRESS_SIZE = 8; 81 private Address rip; 82 private Address rbp; 83 private LinuxDebugger dbg; 84 }