Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/debugger/linux/x86/LinuxX86CFrame.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 | 651919d134f7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 6163 | 2 * Copyright (c) 2003, 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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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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6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.debugger.linux.x86; | |
| 26 | |
| 27 import sun.jvm.hotspot.debugger.*; | |
| 28 import sun.jvm.hotspot.debugger.linux.*; | |
| 29 import sun.jvm.hotspot.debugger.cdbg.*; | |
| 30 import sun.jvm.hotspot.debugger.cdbg.basic.*; | |
| 6163 | 31 import sun.jvm.hotspot.debugger.x86.*; |
| 0 | 32 |
| 33 final public class LinuxX86CFrame extends BasicCFrame { | |
| 34 // package/class internals only | |
| 35 public LinuxX86CFrame(LinuxDebugger 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 | |
| 6163 | 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) ) { | |
| 0 | 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 LinuxX86CFrame(dbg, nextEBP, nextPC); | |
| 73 } | |
| 74 | |
| 75 private static final int ADDRESS_SIZE = 4; | |
| 76 private Address pc; | |
| 77 private Address ebp; | |
| 78 private LinuxDebugger dbg; | |
| 79 } |