Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VFrame.java @ 3908:7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
Reviewed-by: kvn
| author | never |
|---|---|
| date | Mon, 05 Sep 2011 17:09:05 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2000, 2006, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import sun.jvm.hotspot.code.*; | |
| 29 import sun.jvm.hotspot.utilities.*; | |
| 30 | |
| 31 public class VFrame { | |
| 32 protected Frame fr; | |
| 33 protected RegisterMap regMap; | |
| 34 protected JavaThread thread; | |
| 35 | |
| 36 protected VFrame(Frame f, RegisterMap regMap, JavaThread thread) { | |
| 37 this.regMap = (RegisterMap) regMap.clone(); | |
| 38 | |
| 39 if (f != null) { | |
| 40 // the frame is null if we create a deoptimizedVFrame from a vframeArray | |
| 41 fr = (Frame) f.clone(); | |
| 42 } | |
| 43 | |
| 44 this.thread = thread; | |
| 45 } | |
| 46 | |
| 47 /** Factory method for creating vframes. The "unsafe" flag turns off | |
| 48 an assertion which the runtime system uses to ensure integrity, | |
| 49 but which must not be applied in the debugging situation. The | |
| 50 "mayBeImprecise" flag should be set to true for the case of the | |
| 51 top frame in the debugging system (obtained via | |
| 52 JavaThread.getCurrentFrameGuess()). */ | |
| 53 public static VFrame newVFrame(Frame f, RegisterMap regMap, JavaThread thread, boolean unsafe, boolean mayBeImprecise) { | |
| 54 if (f.isInterpretedFrame()) { | |
| 55 return new InterpretedVFrame(f, regMap, thread); | |
| 56 } | |
| 57 | |
| 58 if (!VM.getVM().isCore()) { | |
| 59 CodeBlob cb; | |
| 60 if (unsafe) { | |
| 61 cb = VM.getVM().getCodeCache().findBlobUnsafe(f.getPC()); | |
| 62 } else { | |
| 63 cb = VM.getVM().getCodeCache().findBlob(f.getPC()); | |
| 64 } | |
| 65 | |
| 66 if (cb != null) { | |
| 67 if (cb.isNMethod()) { | |
| 68 NMethod nm = (NMethod) cb; | |
| 69 // Compiled method (native stub or Java code) | |
| 70 ScopeDesc scope = null; | |
| 71 // FIXME: should revisit the check of isDebugging(); should not be necessary | |
| 72 if (mayBeImprecise || VM.getVM().isDebugging()) { | |
| 73 scope = nm.getScopeDescNearDbg(f.getPC()); | |
| 74 } else { | |
| 75 scope = nm.getScopeDescAt(f.getPC()); | |
| 76 } | |
| 77 return new CompiledVFrame(f, regMap, thread, scope, mayBeImprecise); | |
| 78 } | |
| 79 | |
|
3908
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
1552
diff
changeset
|
80 if (f.isRuntimeFrame()) { |
| 0 | 81 // This is a conversion frame. Skip this frame and try again. |
| 82 RegisterMap tempMap = regMap.copy(); | |
| 83 Frame s = f.sender(tempMap); | |
| 84 return newVFrame(s, tempMap, thread, unsafe, false); | |
| 85 } | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 // External frame | |
| 90 return new ExternalVFrame(f, regMap, thread, mayBeImprecise); | |
| 91 } | |
| 92 | |
| 93 /** Factory method for creating vframes. This is equivalent to | |
| 94 calling the above version with the "unsafe" and "imprecise" | |
| 95 flags set to false. */ | |
| 96 public static VFrame newVFrame(Frame f, RegisterMap regMap, JavaThread thread) { | |
| 97 return newVFrame(f, regMap, thread, false, false); | |
| 98 } | |
| 99 | |
| 100 /** Accessors */ | |
| 101 public Frame getFrame() { return fr; } | |
| 102 public RegisterMap getRegisterMap() { return regMap; } | |
| 103 public JavaThread getThread() { return thread; } | |
| 104 | |
| 105 /** Returns the sender vframe */ | |
| 106 public VFrame sender() { | |
| 107 if (Assert.ASSERTS_ENABLED) { | |
| 108 Assert.that(isTop(), "just checking"); | |
| 109 } | |
| 110 return sender(false); | |
| 111 } | |
| 112 | |
| 113 /** Returns the sender vframe; takes argument for debugging situation */ | |
| 114 public VFrame sender(boolean mayBeImprecise) { | |
| 115 RegisterMap tempMap = (RegisterMap) getRegisterMap().clone(); | |
| 116 if (fr.isFirstFrame()) { | |
| 117 return null; | |
| 118 } | |
| 119 Frame s = fr.realSender(tempMap); | |
| 120 // ia64 in 1.4.1 only has java frames and no entryFrame | |
| 121 // so "s" can be null here for the first frame. | |
| 122 if (s == null) { | |
| 123 Assert.that(VM.getVM().getCPU().equals("ia64"), "Only ia64 should have null here"); | |
| 124 return null; | |
| 125 } | |
| 126 if (s.isFirstFrame()) { | |
| 127 return null; | |
| 128 } | |
| 129 return VFrame.newVFrame(s, tempMap, getThread(), VM.getVM().isDebugging(), mayBeImprecise); | |
| 130 } | |
| 131 | |
| 132 /** Returns the next javaVFrame on the stack (skipping all other | |
| 133 kinds of frames). In the debugging situation, allows the | |
| 134 "imprecise" flag to propagate up the stack. We must not assert | |
| 135 that a ScopeDesc exists for the topmost compiled frame on the | |
| 136 stack. */ | |
| 137 public JavaVFrame javaSender() { | |
| 138 boolean imprecise = false; | |
| 139 | |
| 140 // Hack for debugging | |
| 141 if (VM.getVM().isDebugging()) { | |
| 142 if (!isJavaFrame()) { | |
| 143 imprecise = mayBeImpreciseDbg(); | |
| 144 } | |
| 145 } | |
| 146 VFrame f = sender(imprecise); | |
| 147 while (f != null) { | |
| 148 if (f.isJavaFrame()) { | |
| 149 return (JavaVFrame) f; | |
| 150 } | |
| 151 f = f.sender(imprecise); | |
| 152 } | |
| 153 return null; | |
| 154 } | |
| 155 | |
| 156 /** Answers if the this is the top vframe in the frame, i.e., if the | |
| 157 sender vframe is in the caller frame */ | |
| 158 public boolean isTop() { | |
| 159 return true; | |
| 160 } | |
| 161 | |
| 162 /** Returns top vframe within same frame (see isTop()) */ | |
| 163 public VFrame top() { | |
| 164 VFrame vf = this; | |
| 165 while (!vf.isTop()) { | |
| 166 vf = vf.sender(); | |
| 167 } | |
| 168 return vf; | |
| 169 } | |
| 170 | |
| 171 /** Type testing operations */ | |
| 172 public boolean isEntryFrame() { return false; } | |
| 173 public boolean isJavaFrame() { return false; } | |
| 174 public boolean isInterpretedFrame() { return false; } | |
| 175 public boolean isCompiledFrame() { return false; } | |
| 176 public boolean isDeoptimized() { return false; } | |
| 177 | |
| 178 /** An indication of whether this VFrame is "precise" or a best | |
| 179 guess. This is used in the debugging system to handle the top | |
| 180 frame on the stack, which, since the system will in general not | |
| 181 be at a safepoint, has to make some guesses about exactly where | |
| 182 in the execution it is. Any debugger should indicate to the user | |
| 183 that the information for this frame may not be 100% correct. | |
| 184 FIXME: may need to move this up into VFrame instead of keeping | |
| 185 it in CompiledVFrame. */ | |
| 186 public boolean mayBeImpreciseDbg() { return false; } | |
| 187 | |
| 188 /** Printing operations */ | |
| 189 public void print() { | |
| 190 printOn(System.out); | |
| 191 } | |
| 192 | |
| 193 public void printOn(PrintStream tty) { | |
| 194 if (VM.getVM().wizardMode()) { | |
| 195 fr.printValueOn(tty); | |
| 196 } | |
| 197 } | |
| 198 | |
| 199 public void printValue() { | |
| 200 printValueOn(System.out); | |
| 201 } | |
| 202 | |
| 203 public void printValueOn(PrintStream tty) { | |
| 204 printOn(tty); | |
| 205 } | |
| 206 } |