Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/code/CodeCache.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | b9a9ed0f8eeb |
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rev | line source |
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0 | 1 /* |
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7197424: update copyright year to match last edit in jdk8 hotspot repository
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2 * Copyright (c) 2000, 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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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 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); | |
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60 virtualConstructor.addMapping("AdapterBlob", AdapterBlob.class); |
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61 virtualConstructor.addMapping("MethodHandlesAdapterBlob", MethodHandlesAdapterBlob.class); |
0 | 62 virtualConstructor.addMapping("SafepointBlob", SafepointBlob.class); |
63 virtualConstructor.addMapping("DeoptimizationBlob", DeoptimizationBlob.class); | |
64 if (VM.getVM().isServerCompiler()) { | |
65 virtualConstructor.addMapping("ExceptionBlob", ExceptionBlob.class); | |
66 virtualConstructor.addMapping("UncommonTrapBlob", UncommonTrapBlob.class); | |
67 } | |
68 } | |
69 | |
70 public CodeCache() { | |
71 heap = (CodeHeap) VMObjectFactory.newObject(CodeHeap.class, heapField.getValue()); | |
72 } | |
73 | |
989 | 74 public NMethod scavengeRootMethods() { |
75 return (NMethod) VMObjectFactory.newObject(NMethod.class, scavengeRootNMethodsField.getValue()); | |
76 } | |
77 | |
0 | 78 public boolean contains(Address p) { |
79 return getHeap().contains(p); | |
80 } | |
81 | |
82 /** When VM.getVM().isDebugging() returns true, this behaves like | |
83 findBlobUnsafe */ | |
84 public CodeBlob findBlob(Address start) { | |
85 CodeBlob result = findBlobUnsafe(start); | |
86 if (result == null) return null; | |
87 if (VM.getVM().isDebugging()) { | |
88 return result; | |
89 } | |
90 // We could potientially look up non_entrant methods | |
91 // NOTE: this is effectively a "guarantee", and is slightly different from the one in the VM | |
92 if (Assert.ASSERTS_ENABLED) { | |
93 Assert.that(!(result.isZombie() || result.isLockedByVM()), "unsafe access to zombie method"); | |
94 } | |
95 return result; | |
96 } | |
97 | |
98 public CodeBlob findBlobUnsafe(Address start) { | |
99 CodeBlob result = null; | |
100 | |
101 try { | |
102 result = (CodeBlob) virtualConstructor.instantiateWrapperFor(getHeap().findStart(start)); | |
103 } | |
104 catch (WrongTypeException wte) { | |
105 Address cbAddr = null; | |
106 try { | |
107 cbAddr = getHeap().findStart(start); | |
108 } | |
109 catch (Exception findEx) { | |
110 findEx.printStackTrace(); | |
111 } | |
112 | |
113 String message = "Couldn't deduce type of CodeBlob "; | |
114 if (cbAddr != null) { | |
115 message = message + "@" + cbAddr + " "; | |
116 } | |
117 message = message + "for PC=" + start; | |
118 | |
119 throw new RuntimeException(message, wte); | |
120 } | |
121 if (result == null) return null; | |
122 if (Assert.ASSERTS_ENABLED) { | |
123 // The HeapBlock that contains this blob is outside of the blob | |
124 // but it shouldn't be an error to find a blob based on the | |
125 // pointer to the HeapBlock. | |
126 Assert.that(result.blobContains(start) || result.blobContains(start.addOffsetTo(8)), | |
127 "found wrong CodeBlob"); | |
128 } | |
129 return result; | |
130 } | |
131 | |
132 public NMethod findNMethod(Address start) { | |
133 CodeBlob cb = findBlob(start); | |
134 if (Assert.ASSERTS_ENABLED) { | |
135 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
136 } | |
137 return (NMethod) cb; | |
138 } | |
139 | |
140 public NMethod findNMethodUnsafe(Address start) { | |
141 CodeBlob cb = findBlobUnsafe(start); | |
142 if (Assert.ASSERTS_ENABLED) { | |
143 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
144 } | |
145 return (NMethod) cb; | |
146 } | |
147 | |
148 /** Routine for instantiating appropriately-typed wrapper for a | |
149 CodeBlob. Used by CodeCache, Runtime1, etc. */ | |
150 public CodeBlob createCodeBlobWrapper(Address codeBlobAddr) { | |
151 try { | |
152 return (CodeBlob) virtualConstructor.instantiateWrapperFor(codeBlobAddr); | |
153 } | |
154 catch (Exception e) { | |
155 String message = "Unable to deduce type of CodeBlob from address " + codeBlobAddr + | |
156 " (expected type nmethod, RuntimeStub, "; | |
157 if (VM.getVM().isClientCompiler()) { | |
158 message = message + " or "; | |
159 } | |
160 message = message + "SafepointBlob"; | |
161 if (VM.getVM().isServerCompiler()) { | |
162 message = message + ", DeoptimizationBlob, or ExceptionBlob"; | |
163 } | |
164 message = message + ")"; | |
165 throw new RuntimeException(message); | |
166 } | |
167 } | |
168 | |
169 public void iterate(CodeCacheVisitor visitor) { | |
170 CodeHeap heap = getHeap(); | |
171 Address ptr = heap.begin(); | |
172 Address end = heap.end(); | |
173 | |
174 visitor.prologue(ptr, end); | |
175 CodeBlob lastBlob = null; | |
176 while (ptr != null && ptr.lessThan(end)) { | |
177 try { | |
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178 // Use findStart to get a pointer inside blob other findBlob asserts |
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179 CodeBlob blob = findBlobUnsafe(heap.findStart(ptr)); |
0 | 180 if (blob != null) { |
181 visitor.visit(blob); | |
182 if (blob == lastBlob) { | |
183 throw new InternalError("saw same blob twice"); | |
184 } | |
185 lastBlob = blob; | |
186 } | |
187 } catch (RuntimeException e) { | |
188 e.printStackTrace(); | |
189 } | |
190 Address next = heap.nextBlock(ptr); | |
191 if (next != null && next.lessThan(ptr)) { | |
192 throw new InternalError("pointer moved backwards"); | |
193 } | |
194 ptr = next; | |
195 } | |
196 visitor.epilogue(); | |
197 } | |
198 | |
199 //-------------------------------------------------------------------------------- | |
200 // Internals only below this point | |
201 // | |
202 | |
203 private CodeHeap getHeap() { | |
204 return heap; | |
205 } | |
206 } |