Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/code/PCDesc.java @ 900:9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
Summary: developed a reexecute logic for the interpreter to reexecute the bytecode when deopt happens
Reviewed-by: kvn, never, jrose, twisti
author | cfang |
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date | Fri, 31 Jul 2009 17:12:33 -0700 |
parents | a61af66fc99e |
children | 72088be4b386 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2000-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.code; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.debugger.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 | |
33 /** PcDescs map a physical PC (given as offset from start of nmethod) | |
34 to the corresponding source scope and byte code index. */ | |
35 | |
36 public class PCDesc extends VMObject { | |
37 private static CIntegerField pcOffsetField; | |
38 private static CIntegerField scopeDecodeOffsetField; | |
39 | |
40 static { | |
41 VM.registerVMInitializedObserver(new Observer() { | |
42 public void update(Observable o, Object data) { | |
43 initialize(VM.getVM().getTypeDataBase()); | |
44 } | |
45 }); | |
46 } | |
47 | |
48 private static void initialize(TypeDataBase db) { | |
49 Type type = db.lookupType("PcDesc"); | |
50 | |
51 pcOffsetField = type.getCIntegerField("_pc_offset"); | |
52 scopeDecodeOffsetField = type.getCIntegerField("_scope_decode_offset"); | |
53 } | |
54 | |
55 public PCDesc(Address addr) { | |
56 super(addr); | |
57 } | |
58 | |
59 // FIXME: add additional constructor probably needed for ScopeDesc::sender() | |
60 | |
61 public int getPCOffset() { | |
62 return (int) pcOffsetField.getValue(addr); | |
63 } | |
64 | |
65 public int getScopeDecodeOffset() { | |
66 return ((int) scopeDecodeOffsetField.getValue(addr)); | |
67 } | |
68 | |
69 public Address getRealPC(NMethod code) { | |
70 return code.instructionsBegin().addOffsetTo(getPCOffset()); | |
71 } | |
72 | |
73 public void print(NMethod code) { | |
74 printOn(System.out, code); | |
75 } | |
76 | |
77 public void printOn(PrintStream tty, NMethod code) { | |
78 tty.println("PCDesc(" + getRealPC(code) + "):"); | |
79 for (ScopeDesc sd = code.getScopeDescAt(getRealPC(code)); | |
80 sd != null; | |
81 sd = sd.sender()) { | |
82 tty.print(" "); | |
83 sd.getMethod().printValueOn(tty); | |
84 tty.print(" @" + sd.getBCI()); | |
900
9987d9d5eb0e
6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
cfang
parents:
0
diff
changeset
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85 tty.print(" reexecute=" + sd.getReexecute()); |
0 | 86 tty.println(); |
87 } | |
88 } | |
89 } |