author | never |
Mon, 05 Sep 2011 17:09:05 -0700 | |
changeset 10517 | f92c9ff3a15f |
parent 5547 | f4b087cbb361 |
child 28369 | a62a208f18de |
permissions | -rw-r--r-- |
1 | 1 |
/* |
5547
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1
diff
changeset
|
2 |
* Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved. |
1 | 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 |
* |
|
5547
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1
diff
changeset
|
21 |
* questions. |
1 | 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 |
||
10517
f92c9ff3a15f
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
5547
diff
changeset
|
80 |
if (f.isRuntimeFrame()) { |
1 | 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 |
} |