Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/code/CodeCache.java @ 1040:873ec3787992
6892186: SA does not dump debug info for scalar replaced objects
Summary: Implement scalar replaced objects debug info dump in SA.
Reviewed-by: twisti
author | kvn |
---|---|
date | Wed, 21 Oct 2009 09:15:33 -0700 |
parents | 148e5441d916 |
children | c18cbe5936b8 |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 2000-2005 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.util.*; | |
28 import sun.jvm.hotspot.debugger.*; | |
29 import sun.jvm.hotspot.memory.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 import sun.jvm.hotspot.utilities.*; | |
33 | |
34 public class CodeCache { | |
35 private static AddressField heapField; | |
989 | 36 private static AddressField scavengeRootNMethodsField; |
0 | 37 private static VirtualConstructor virtualConstructor; |
38 | |
39 private CodeHeap heap; | |
40 | |
41 static { | |
42 VM.registerVMInitializedObserver(new Observer() { | |
43 public void update(Observable o, Object data) { | |
44 initialize(VM.getVM().getTypeDataBase()); | |
45 } | |
46 }); | |
47 } | |
48 | |
49 private static synchronized void initialize(TypeDataBase db) { | |
50 Type type = db.lookupType("CodeCache"); | |
51 | |
52 heapField = type.getAddressField("_heap"); | |
989 | 53 scavengeRootNMethodsField = type.getAddressField("_scavenge_root_nmethods"); |
0 | 54 |
55 virtualConstructor = new VirtualConstructor(db); | |
56 // Add mappings for all possible CodeBlob subclasses | |
57 virtualConstructor.addMapping("BufferBlob", BufferBlob.class); | |
58 virtualConstructor.addMapping("nmethod", NMethod.class); | |
59 virtualConstructor.addMapping("RuntimeStub", RuntimeStub.class); | |
60 virtualConstructor.addMapping("SafepointBlob", SafepointBlob.class); | |
61 virtualConstructor.addMapping("DeoptimizationBlob", DeoptimizationBlob.class); | |
62 if (VM.getVM().isServerCompiler()) { | |
63 virtualConstructor.addMapping("ExceptionBlob", ExceptionBlob.class); | |
64 virtualConstructor.addMapping("UncommonTrapBlob", UncommonTrapBlob.class); | |
65 } | |
66 } | |
67 | |
68 public CodeCache() { | |
69 heap = (CodeHeap) VMObjectFactory.newObject(CodeHeap.class, heapField.getValue()); | |
70 } | |
71 | |
989 | 72 public NMethod scavengeRootMethods() { |
73 return (NMethod) VMObjectFactory.newObject(NMethod.class, scavengeRootNMethodsField.getValue()); | |
74 } | |
75 | |
0 | 76 public boolean contains(Address p) { |
77 return getHeap().contains(p); | |
78 } | |
79 | |
80 /** When VM.getVM().isDebugging() returns true, this behaves like | |
81 findBlobUnsafe */ | |
82 public CodeBlob findBlob(Address start) { | |
83 CodeBlob result = findBlobUnsafe(start); | |
84 if (result == null) return null; | |
85 if (VM.getVM().isDebugging()) { | |
86 return result; | |
87 } | |
88 // We could potientially look up non_entrant methods | |
89 // NOTE: this is effectively a "guarantee", and is slightly different from the one in the VM | |
90 if (Assert.ASSERTS_ENABLED) { | |
91 Assert.that(!(result.isZombie() || result.isLockedByVM()), "unsafe access to zombie method"); | |
92 } | |
93 return result; | |
94 } | |
95 | |
96 public CodeBlob findBlobUnsafe(Address start) { | |
97 CodeBlob result = null; | |
98 | |
99 try { | |
100 result = (CodeBlob) virtualConstructor.instantiateWrapperFor(getHeap().findStart(start)); | |
101 } | |
102 catch (WrongTypeException wte) { | |
103 Address cbAddr = null; | |
104 try { | |
105 cbAddr = getHeap().findStart(start); | |
106 } | |
107 catch (Exception findEx) { | |
108 findEx.printStackTrace(); | |
109 } | |
110 | |
111 String message = "Couldn't deduce type of CodeBlob "; | |
112 if (cbAddr != null) { | |
113 message = message + "@" + cbAddr + " "; | |
114 } | |
115 message = message + "for PC=" + start; | |
116 | |
117 throw new RuntimeException(message, wte); | |
118 } | |
119 if (result == null) return null; | |
120 if (Assert.ASSERTS_ENABLED) { | |
121 // The HeapBlock that contains this blob is outside of the blob | |
122 // but it shouldn't be an error to find a blob based on the | |
123 // pointer to the HeapBlock. | |
124 Assert.that(result.blobContains(start) || result.blobContains(start.addOffsetTo(8)), | |
125 "found wrong CodeBlob"); | |
126 } | |
127 return result; | |
128 } | |
129 | |
130 public NMethod findNMethod(Address start) { | |
131 CodeBlob cb = findBlob(start); | |
132 if (Assert.ASSERTS_ENABLED) { | |
133 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
134 } | |
135 return (NMethod) cb; | |
136 } | |
137 | |
138 public NMethod findNMethodUnsafe(Address start) { | |
139 CodeBlob cb = findBlobUnsafe(start); | |
140 if (Assert.ASSERTS_ENABLED) { | |
141 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
142 } | |
143 return (NMethod) cb; | |
144 } | |
145 | |
146 /** Routine for instantiating appropriately-typed wrapper for a | |
147 CodeBlob. Used by CodeCache, Runtime1, etc. */ | |
148 public CodeBlob createCodeBlobWrapper(Address codeBlobAddr) { | |
149 try { | |
150 return (CodeBlob) virtualConstructor.instantiateWrapperFor(codeBlobAddr); | |
151 } | |
152 catch (Exception e) { | |
153 String message = "Unable to deduce type of CodeBlob from address " + codeBlobAddr + | |
154 " (expected type nmethod, RuntimeStub, "; | |
155 if (VM.getVM().isClientCompiler()) { | |
156 message = message + " or "; | |
157 } | |
158 message = message + "SafepointBlob"; | |
159 if (VM.getVM().isServerCompiler()) { | |
160 message = message + ", DeoptimizationBlob, or ExceptionBlob"; | |
161 } | |
162 message = message + ")"; | |
163 throw new RuntimeException(message); | |
164 } | |
165 } | |
166 | |
167 public void iterate(CodeCacheVisitor visitor) { | |
168 CodeHeap heap = getHeap(); | |
169 Address ptr = heap.begin(); | |
170 Address end = heap.end(); | |
171 | |
172 visitor.prologue(ptr, end); | |
173 CodeBlob lastBlob = null; | |
174 while (ptr != null && ptr.lessThan(end)) { | |
175 try { | |
1040
873ec3787992
6892186: SA does not dump debug info for scalar replaced objects
kvn
parents:
989
diff
changeset
|
176 // Use findStart to get a pointer inside blob other findBlob asserts |
873ec3787992
6892186: SA does not dump debug info for scalar replaced objects
kvn
parents:
989
diff
changeset
|
177 CodeBlob blob = findBlobUnsafe(heap.findStart(ptr)); |
0 | 178 if (blob != null) { |
179 visitor.visit(blob); | |
180 if (blob == lastBlob) { | |
181 throw new InternalError("saw same blob twice"); | |
182 } | |
183 lastBlob = blob; | |
184 } | |
185 } catch (RuntimeException e) { | |
186 e.printStackTrace(); | |
187 } | |
188 Address next = heap.nextBlock(ptr); | |
189 if (next != null && next.lessThan(ptr)) { | |
190 throw new InternalError("pointer moved backwards"); | |
191 } | |
192 ptr = next; | |
193 } | |
194 visitor.epilogue(); | |
195 } | |
196 | |
197 //-------------------------------------------------------------------------------- | |
198 // Internals only below this point | |
199 // | |
200 | |
201 private CodeHeap getHeap() { | |
202 return heap; | |
203 } | |
204 } |