Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/debugger/cdbg/basic/x86/X86CFrame.java @ 6163:b87e5a681416
6310967: SA: jstack -m produce failures in output
Summary: While looking for the sender frame check that the frame pointer should not be less than the stack pointer.
Reviewed-by: dholmes, sla
| author | poonam |
|---|---|
| date | Thu, 14 Jun 2012 02:12:46 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 6163 | 2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.debugger.cdbg.basic.x86; | |
| 26 | |
| 27 import sun.jvm.hotspot.debugger.*; | |
| 6163 | 28 import sun.jvm.hotspot.debugger.x86.*; |
| 0 | 29 import sun.jvm.hotspot.debugger.cdbg.*; |
| 30 import sun.jvm.hotspot.debugger.cdbg.basic.*; | |
| 31 | |
| 32 /** Basic X86 frame functionality providing sender() functionality. */ | |
| 33 | |
| 34 public class X86CFrame extends BasicCFrame { | |
| 35 private Address ebp; | |
| 36 private Address pc; | |
| 37 | |
| 38 private static final int ADDRESS_SIZE = 4; | |
| 39 | |
| 40 /** Constructor for topmost frame */ | |
| 41 public X86CFrame(CDebugger dbg, Address ebp, Address pc) { | |
| 42 super(dbg); | |
| 43 this.ebp = ebp; | |
| 44 this.pc = pc; | |
| 45 } | |
| 46 | |
| 6163 | 47 public CFrame sender(ThreadProxy thread) { |
| 48 X86ThreadContext context = (X86ThreadContext) thread.getContext(); | |
| 49 Address esp = context.getRegisterAsAddress(X86ThreadContext.ESP); | |
| 50 | |
| 51 if ( (ebp == null) || ebp.lessThan(esp) ) { | |
| 0 | 52 return null; |
| 53 } | |
| 54 | |
| 55 Address nextEBP = ebp.getAddressAt( 0 * ADDRESS_SIZE); | |
| 56 if (nextEBP == null) { | |
| 57 return null; | |
| 58 } | |
| 59 Address nextPC = ebp.getAddressAt( 1 * ADDRESS_SIZE); | |
| 60 if (nextPC == null) { | |
| 61 return null; | |
| 62 } | |
| 63 return new X86CFrame(dbg(), nextEBP, nextPC); | |
| 64 } | |
| 65 | |
| 66 public Address pc() { | |
| 67 return pc; | |
| 68 } | |
| 69 | |
| 70 public Address localVariableBase() { | |
| 71 return ebp; | |
| 72 } | |
| 73 } |