Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/compiler/OopMapSet.java @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
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date | Tue, 05 Apr 2011 14:12:31 -0700 |
parents | c18cbe5936b8 |
children | 7588156f5cf9 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2008, 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.compiler; | |
26 | |
27 import java.util.*; | |
28 | |
29 import sun.jvm.hotspot.code.*; | |
30 import sun.jvm.hotspot.debugger.*; | |
31 import sun.jvm.hotspot.runtime.*; | |
32 import sun.jvm.hotspot.types.*; | |
33 import sun.jvm.hotspot.utilities.*; | |
34 | |
35 public class OopMapSet extends VMObject { | |
36 private static final boolean DEBUG = System.getProperty("sun.jvm.hotspot.compiler.OopMapSet.DEBUG") != null; | |
37 | |
38 private static CIntegerField omCountField; | |
39 private static CIntegerField omSizeField; | |
40 private static AddressField omDataField; | |
41 private static int REG_COUNT; | |
42 private static int SAVED_ON_ENTRY_REG_COUNT; | |
43 private static int C_SAVED_ON_ENTRY_REG_COUNT; | |
44 private static class MyVisitor implements OopMapVisitor { | |
45 private AddressVisitor addressVisitor; | |
46 | |
47 public MyVisitor(AddressVisitor oopVisitor) { | |
48 setAddressVisitor(oopVisitor); | |
49 } | |
50 | |
51 public void setAddressVisitor(AddressVisitor addressVisitor) { | |
52 this.addressVisitor = addressVisitor; | |
53 } | |
54 | |
55 public void visitOopLocation(Address oopAddr) { | |
56 addressVisitor.visitAddress(oopAddr); | |
57 } | |
58 | |
59 public void visitDerivedOopLocation(Address baseOopAddr, Address derivedOopAddr) { | |
60 if (VM.getVM().isClientCompiler()) { | |
61 Assert.that(false, "should not reach here"); | |
62 } else if (VM.getVM().isServerCompiler() && | |
63 VM.getVM().useDerivedPointerTable()) { | |
64 Assert.that(false, "FIXME: add derived pointer table"); | |
65 } | |
66 } | |
67 | |
68 public void visitValueLocation(Address valueAddr) { | |
69 } | |
70 | |
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71 public void visitNarrowOopLocation(Address narrowOopAddr) { |
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72 addressVisitor.visitCompOopAddress(narrowOopAddr); |
0 | 73 } |
74 } | |
75 | |
76 static { | |
77 VM.registerVMInitializedObserver(new Observer() { | |
78 public void update(Observable o, Object data) { | |
79 initialize(VM.getVM().getTypeDataBase()); | |
80 } | |
81 }); | |
82 } | |
83 | |
84 private static void initialize(TypeDataBase db) { | |
85 Type type = db.lookupType("OopMapSet"); | |
86 | |
87 omCountField = type.getCIntegerField("_om_count"); | |
88 omSizeField = type.getCIntegerField("_om_size"); | |
89 omDataField = type.getAddressField("_om_data"); | |
90 | |
91 if (!VM.getVM().isCore()) { | |
92 REG_COUNT = db.lookupIntConstant("REG_COUNT").intValue(); | |
93 if (VM.getVM().isServerCompiler()) { | |
94 SAVED_ON_ENTRY_REG_COUNT = (int) db.lookupIntConstant("SAVED_ON_ENTRY_REG_COUNT").intValue(); | |
95 C_SAVED_ON_ENTRY_REG_COUNT = (int) db.lookupIntConstant("C_SAVED_ON_ENTRY_REG_COUNT").intValue(); | |
96 } | |
97 } | |
98 } | |
99 | |
100 public OopMapSet(Address addr) { | |
101 super(addr); | |
102 } | |
103 | |
104 /** Returns the number of OopMaps in this OopMapSet */ | |
105 public long getSize() { | |
106 return omCountField.getValue(addr); | |
107 } | |
108 | |
109 /** returns the OopMap at a given index */ | |
110 public OopMap getMapAt(int index) { | |
111 if (Assert.ASSERTS_ENABLED) { | |
112 Assert.that((index >= 0) && (index <= getSize()),"bad index"); | |
113 } | |
114 Address omDataAddr = omDataField.getValue(addr); | |
115 Address oopMapAddr = omDataAddr.getAddressAt(index * VM.getVM().getAddressSize()); | |
116 if (oopMapAddr == null) { | |
117 return null; | |
118 } | |
119 return new OopMap(oopMapAddr); | |
120 } | |
121 | |
122 public OopMap findMapAtOffset(long pcOffset, boolean debugging) { | |
123 int i; | |
124 int len = (int) getSize(); | |
125 if (Assert.ASSERTS_ENABLED) { | |
126 Assert.that(len > 0, "must have pointer maps"); | |
127 } | |
128 | |
129 // Scan through oopmaps. Stop when current offset is either equal or greater | |
130 // than the one we are looking for. | |
131 for (i = 0; i < len; i++) { | |
132 if (getMapAt(i).getOffset() >= pcOffset) { | |
133 break; | |
134 } | |
135 } | |
136 | |
137 if (!debugging) { | |
138 if (Assert.ASSERTS_ENABLED) { | |
139 Assert.that(i < len, "oopmap not found for pcOffset = " + pcOffset + "; len = " + len); | |
140 Assert.that(getMapAt(i).getOffset() == pcOffset, "oopmap not found"); | |
141 } | |
142 } else { | |
143 if (i == len) { | |
144 if (DEBUG) { | |
145 System.out.println("can't find oopmap at " + pcOffset); | |
146 System.out.print("Oopmap offsets are [ "); | |
147 for (i = 0; i < len; i++) { | |
148 System.out.print(getMapAt(i).getOffset()); | |
149 } | |
150 System.out.println("]"); | |
151 } | |
152 i = len - 1; | |
153 return getMapAt(i); | |
154 } | |
155 } | |
156 | |
157 OopMap m = getMapAt(i); | |
158 return m; | |
159 } | |
160 | |
161 /** Visitation -- iterates through the frame for a compiled method. | |
162 This is a very generic mechanism that requires the Address to be | |
163 dereferenced by the callee. Other, more specialized, visitation | |
164 mechanisms are given below. */ | |
165 public static void oopsDo(Frame fr, CodeBlob cb, RegisterMap regMap, AddressVisitor oopVisitor, boolean debugging) { | |
166 allDo(fr, cb, regMap, new MyVisitor(oopVisitor), debugging); | |
167 } | |
168 | |
169 /** Note that there are 4 required AddressVisitors: one for oops, | |
170 one for derived oops, one for values, and one for dead values */ | |
171 public static void allDo(Frame fr, CodeBlob cb, RegisterMap regMap, OopMapVisitor visitor, boolean debugging) { | |
172 if (Assert.ASSERTS_ENABLED) { | |
173 CodeBlob tmpCB = VM.getVM().getCodeCache().findBlob(fr.getPC()); | |
174 Assert.that(tmpCB != null && cb.equals(tmpCB), "wrong codeblob passed in"); | |
175 } | |
176 | |
177 OopMapSet maps = cb.getOopMaps(); | |
178 OopMap map = cb.getOopMapForReturnAddress(fr.getPC(), debugging); | |
179 if (Assert.ASSERTS_ENABLED) { | |
180 Assert.that(map != null, "no ptr map found"); | |
181 } | |
182 | |
183 // handle derived pointers first (otherwise base pointer may be | |
184 // changed before derived pointer offset has been collected) | |
185 OopMapValue omv; | |
186 { | |
187 for (OopMapStream oms = new OopMapStream(map, OopMapValue.OopTypes.DERIVED_OOP_VALUE); !oms.isDone(); oms.next()) { | |
188 if (VM.getVM().isClientCompiler()) { | |
189 Assert.that(false, "should not reach here"); | |
190 } | |
191 omv = oms.getCurrent(); | |
192 Address loc = fr.oopMapRegToLocation(omv.getReg(), regMap); | |
193 if (loc != null) { | |
194 Address baseLoc = fr.oopMapRegToLocation(omv.getContentReg(), regMap); | |
195 Address derivedLoc = loc; | |
196 visitor.visitDerivedOopLocation(baseLoc, derivedLoc); | |
197 } | |
198 } | |
199 } | |
200 | |
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201 // We want narow oop, value and oop oop_types |
0 | 202 OopMapValue.OopTypes[] values = new OopMapValue.OopTypes[] { |
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203 OopMapValue.OopTypes.OOP_VALUE, OopMapValue.OopTypes.VALUE_VALUE, OopMapValue.OopTypes.NARROWOOP_VALUE |
0 | 204 }; |
205 | |
206 { | |
207 for (OopMapStream oms = new OopMapStream(map, values); !oms.isDone(); oms.next()) { | |
208 omv = oms.getCurrent(); | |
209 Address loc = fr.oopMapRegToLocation(omv.getReg(), regMap); | |
210 if (loc != null) { | |
211 if (omv.getType() == OopMapValue.OopTypes.OOP_VALUE) { | |
212 // This assert commented out because this will be useful | |
213 // to detect in the debugging system | |
214 // assert(Universe::is_heap_or_null(*loc), "found non oop pointer"); | |
215 visitor.visitOopLocation(loc); | |
216 } else if (omv.getType() == OopMapValue.OopTypes.VALUE_VALUE) { | |
217 visitor.visitValueLocation(loc); | |
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218 } else if (omv.getType() == OopMapValue.OopTypes.NARROWOOP_VALUE) { |
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219 visitor.visitNarrowOopLocation(loc); |
0 | 220 } |
221 } | |
222 } | |
223 } | |
224 } | |
225 | |
226 /** Update callee-saved register info for the following frame. | |
227 Should only be called in non-core builds. */ | |
228 public static void updateRegisterMap(Frame fr, CodeBlob cb, RegisterMap regMap, boolean debugging) { | |
229 if (Assert.ASSERTS_ENABLED) { | |
230 Assert.that(!VM.getVM().isCore(), "non-core builds only"); | |
231 } | |
232 | |
233 if (!VM.getVM().isDebugging()) { | |
234 if (Assert.ASSERTS_ENABLED) { | |
235 OopMapSet maps = cb.getOopMaps(); | |
236 Assert.that((maps != null) && (maps.getSize() > 0), "found null or empty OopMapSet for CodeBlob"); | |
237 } | |
238 } else { | |
239 // Hack for some topmost frames that have been found with empty | |
240 // OopMapSets. (Actually have not seen the null case, but don't | |
241 // want to take any chances.) See HSDB.showThreadStackMemory(). | |
242 OopMapSet maps = cb.getOopMaps(); | |
243 if ((maps == null) || (maps.getSize() == 0)) { | |
244 return; | |
245 } | |
246 } | |
247 | |
248 // Check if caller must update oop argument | |
249 regMap.setIncludeArgumentOops(cb.callerMustGCArguments(regMap.getThread())); | |
250 | |
251 int nofCallee = 0; | |
252 Address[] locs = new Address[2 * REG_COUNT + 1]; | |
253 VMReg [] regs = new VMReg [2 * REG_COUNT + 1]; | |
254 // ("+1" because REG_COUNT might be zero) | |
255 | |
256 // Scan through oopmap and find location of all callee-saved registers | |
257 // (we do not do update in place, since info could be overwritten) | |
258 OopMap map = cb.getOopMapForReturnAddress(fr.getPC(), debugging); | |
259 if (Assert.ASSERTS_ENABLED) { | |
260 Assert.that(map != null, "no ptr map found"); | |
261 } | |
262 | |
263 OopMapValue omv = null; | |
264 for(OopMapStream oms = new OopMapStream(map, OopMapValue.OopTypes.CALLEE_SAVED_VALUE); !oms.isDone(); oms.next()) { | |
265 omv = oms.getCurrent(); | |
266 if (Assert.ASSERTS_ENABLED) { | |
267 Assert.that(nofCallee < 2 * REG_COUNT, "overflow"); | |
268 } | |
269 regs[nofCallee] = omv.getContentReg(); | |
270 locs[nofCallee] = fr.oopMapRegToLocation(omv.getReg(), regMap); | |
271 nofCallee++; | |
272 } | |
273 | |
274 // Check that runtime stubs save all callee-saved registers | |
275 // After adapter frames were deleted C2 doesn't use callee save registers at present | |
276 if (Assert.ASSERTS_ENABLED) { | |
277 if (VM.getVM().isServerCompiler()) { | |
278 Assert.that(!cb.isRuntimeStub() || | |
279 (nofCallee >= SAVED_ON_ENTRY_REG_COUNT || nofCallee >= C_SAVED_ON_ENTRY_REG_COUNT), | |
280 "must save all"); | |
281 } | |
282 } | |
283 | |
284 // Copy found callee-saved register to reg_map | |
285 for (int i = 0; i < nofCallee; i++) { | |
286 regMap.setLocation(regs[i], locs[i]); | |
287 } | |
288 } | |
289 } |