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annotate src/share/vm/code/debugInfo.hpp @ 21195:a4b60873851b
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author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 23 Apr 2015 11:30:06 +0200 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 | |
1972 | 25 #ifndef SHARE_VM_CODE_DEBUGINFO_HPP |
26 #define SHARE_VM_CODE_DEBUGINFO_HPP | |
27 | |
28 #include "code/compressedStream.hpp" | |
29 #include "code/location.hpp" | |
30 #include "code/nmethod.hpp" | |
31 #include "code/oopRecorder.hpp" | |
32 #include "runtime/stackValue.hpp" | |
33 #include "utilities/growableArray.hpp" | |
34 | |
0 | 35 // Classes used for serializing debugging information. |
36 // These abstractions are introducted to provide symmetric | |
37 // read and write operations. | |
38 | |
39 // ScopeValue describes the value of a variable/expression in a scope | |
40 // - LocationValue describes a value in a given location (in frame or register) | |
41 // - ConstantValue describes a constant | |
42 | |
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43 class ConstantOopReadValue; |
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44 class ObjectValue; |
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45 |
0 | 46 class ScopeValue: public ResourceObj { |
47 public: | |
48 // Testers | |
49 virtual bool is_location() const { return false; } | |
50 virtual bool is_object() const { return false; } | |
51 virtual bool is_constant_int() const { return false; } | |
52 virtual bool is_constant_double() const { return false; } | |
53 virtual bool is_constant_long() const { return false; } | |
54 virtual bool is_constant_oop() const { return false; } | |
55 virtual bool equals(ScopeValue* other) const { return false; } | |
56 | |
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57 ConstantOopReadValue* as_ConstantOopReadValue() { |
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58 assert(is_constant_oop(), "must be"); |
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59 return (ConstantOopReadValue*) this; |
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60 } |
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61 |
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62 ObjectValue* as_ObjectValue() { |
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63 assert(is_object(), "must be"); |
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64 return (ObjectValue*)this; |
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65 } |
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66 |
0 | 67 // Serialization of debugging information |
68 virtual void write_on(DebugInfoWriteStream* stream) = 0; | |
69 static ScopeValue* read_from(DebugInfoReadStream* stream); | |
70 }; | |
71 | |
72 | |
73 // A Location value describes a value in a given location; i.e. the corresponding | |
74 // logical entity (e.g., a method temporary) lives in this location. | |
75 | |
76 class LocationValue: public ScopeValue { | |
77 private: | |
78 Location _location; | |
79 public: | |
80 LocationValue(Location location) { _location = location; } | |
81 bool is_location() const { return true; } | |
82 Location location() const { return _location; } | |
83 | |
84 // Serialization of debugging information | |
85 LocationValue(DebugInfoReadStream* stream); | |
86 void write_on(DebugInfoWriteStream* stream); | |
87 | |
88 // Printing | |
89 void print_on(outputStream* st) const; | |
90 }; | |
91 | |
92 | |
93 // An ObjectValue describes an object eliminated by escape analysis. | |
94 | |
95 class ObjectValue: public ScopeValue { | |
96 private: | |
97 int _id; | |
98 ScopeValue* _klass; | |
99 GrowableArray<ScopeValue*> _field_values; | |
100 Handle _value; | |
101 bool _visited; | |
102 | |
103 public: | |
104 ObjectValue(int id, ScopeValue* klass) | |
105 : _id(id) | |
106 , _klass(klass) | |
107 , _field_values() | |
108 , _value() | |
109 , _visited(false) { | |
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110 assert(klass->is_constant_oop(), "should be constant java mirror oop"); |
0 | 111 } |
112 | |
113 ObjectValue(int id) | |
114 : _id(id) | |
115 , _klass(NULL) | |
116 , _field_values() | |
117 , _value() | |
118 , _visited(false) {} | |
119 | |
120 // Accessors | |
121 bool is_object() const { return true; } | |
122 int id() const { return _id; } | |
123 ScopeValue* klass() const { return _klass; } | |
124 GrowableArray<ScopeValue*>* field_values() { return &_field_values; } | |
125 ScopeValue* field_at(int i) const { return _field_values.at(i); } | |
126 int field_size() { return _field_values.length(); } | |
127 Handle value() const { return _value; } | |
128 bool is_visited() const { return _visited; } | |
129 | |
130 void set_value(oop value) { _value = Handle(value); } | |
131 void set_visited(bool visited) { _visited = false; } | |
132 | |
133 // Serialization of debugging information | |
134 void read_object(DebugInfoReadStream* stream); | |
135 void write_on(DebugInfoWriteStream* stream); | |
136 | |
137 // Printing | |
138 void print_on(outputStream* st) const; | |
139 void print_fields_on(outputStream* st) const; | |
140 }; | |
141 | |
142 | |
143 // A ConstantIntValue describes a constant int; i.e., the corresponding logical entity | |
144 // is either a source constant or its computation has been constant-folded. | |
145 | |
146 class ConstantIntValue: public ScopeValue { | |
147 private: | |
148 jint _value; | |
149 public: | |
150 ConstantIntValue(jint value) { _value = value; } | |
151 jint value() const { return _value; } | |
152 bool is_constant_int() const { return true; } | |
153 bool equals(ScopeValue* other) const { return false; } | |
154 | |
155 // Serialization of debugging information | |
156 ConstantIntValue(DebugInfoReadStream* stream); | |
157 void write_on(DebugInfoWriteStream* stream); | |
158 | |
159 // Printing | |
160 void print_on(outputStream* st) const; | |
161 }; | |
162 | |
163 class ConstantLongValue: public ScopeValue { | |
164 private: | |
165 jlong _value; | |
166 public: | |
167 ConstantLongValue(jlong value) { _value = value; } | |
168 jlong value() const { return _value; } | |
169 bool is_constant_long() const { return true; } | |
170 bool equals(ScopeValue* other) const { return false; } | |
171 | |
172 // Serialization of debugging information | |
173 ConstantLongValue(DebugInfoReadStream* stream); | |
174 void write_on(DebugInfoWriteStream* stream); | |
175 | |
176 // Printing | |
177 void print_on(outputStream* st) const; | |
178 }; | |
179 | |
180 class ConstantDoubleValue: public ScopeValue { | |
181 private: | |
182 jdouble _value; | |
183 public: | |
184 ConstantDoubleValue(jdouble value) { _value = value; } | |
185 jdouble value() const { return _value; } | |
186 bool is_constant_double() const { return true; } | |
187 bool equals(ScopeValue* other) const { return false; } | |
188 | |
189 // Serialization of debugging information | |
190 ConstantDoubleValue(DebugInfoReadStream* stream); | |
191 void write_on(DebugInfoWriteStream* stream); | |
192 | |
193 // Printing | |
194 void print_on(outputStream* st) const; | |
195 }; | |
196 | |
197 // A ConstantOopWriteValue is created by the compiler to | |
198 // be written as debugging information. | |
199 | |
200 class ConstantOopWriteValue: public ScopeValue { | |
201 private: | |
202 jobject _value; | |
203 public: | |
204 ConstantOopWriteValue(jobject value) { _value = value; } | |
205 jobject value() const { return _value; } | |
206 bool is_constant_oop() const { return true; } | |
207 bool equals(ScopeValue* other) const { return false; } | |
208 | |
209 // Serialization of debugging information | |
210 void write_on(DebugInfoWriteStream* stream); | |
211 | |
212 // Printing | |
213 void print_on(outputStream* st) const; | |
214 }; | |
215 | |
216 // A ConstantOopReadValue is created by the VM when reading | |
217 // debug information | |
218 | |
219 class ConstantOopReadValue: public ScopeValue { | |
220 private: | |
221 Handle _value; | |
222 public: | |
223 Handle value() const { return _value; } | |
224 bool is_constant_oop() const { return true; } | |
225 bool equals(ScopeValue* other) const { return false; } | |
226 | |
227 // Serialization of debugging information | |
228 ConstantOopReadValue(DebugInfoReadStream* stream); | |
229 void write_on(DebugInfoWriteStream* stream); | |
230 | |
231 // Printing | |
232 void print_on(outputStream* st) const; | |
233 }; | |
234 | |
235 // MonitorValue describes the pair used for monitor_enter and monitor_exit. | |
236 | |
237 class MonitorValue: public ResourceObj { | |
238 private: | |
239 ScopeValue* _owner; | |
240 Location _basic_lock; | |
241 bool _eliminated; | |
242 public: | |
243 // Constructor | |
244 MonitorValue(ScopeValue* owner, Location basic_lock, bool eliminated = false); | |
245 | |
246 // Accessors | |
247 ScopeValue* owner() const { return _owner; } | |
248 Location basic_lock() const { return _basic_lock; } | |
249 bool eliminated() const { return _eliminated; } | |
250 | |
251 // Serialization of debugging information | |
252 MonitorValue(DebugInfoReadStream* stream); | |
253 void write_on(DebugInfoWriteStream* stream); | |
254 | |
255 // Printing | |
256 void print_on(outputStream* st) const; | |
257 }; | |
258 | |
259 // DebugInfoReadStream specializes CompressedReadStream for reading | |
260 // debugging information. Used by ScopeDesc. | |
261 | |
262 class DebugInfoReadStream : public CompressedReadStream { | |
263 private: | |
264 const nmethod* _code; | |
265 const nmethod* code() const { return _code; } | |
266 GrowableArray<ScopeValue*>* _obj_pool; | |
267 public: | |
268 DebugInfoReadStream(const nmethod* code, int offset, GrowableArray<ScopeValue*>* obj_pool = NULL) : | |
269 CompressedReadStream(code->scopes_data_begin(), offset) { | |
270 _code = code; | |
271 _obj_pool = obj_pool; | |
272 | |
273 } ; | |
274 | |
275 oop read_oop() { | |
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276 oop o = code()->oop_at(read_int()); |
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277 assert(o == NULL || o->is_oop(), "oop only"); |
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278 return o; |
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279 } |
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280 Method* read_method() { |
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281 Method* o = (Method*)(code()->metadata_at(read_int())); |
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282 // is_metadata() is a faster check than is_metaspace_object() |
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283 assert(o == NULL || o->is_metadata(), "meta data only"); |
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284 return o; |
0 | 285 } |
286 ScopeValue* read_object_value(); | |
287 ScopeValue* get_cached_object(); | |
288 // BCI encoding is mostly unsigned, but -1 is a distinguished value | |
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289 int read_bci() { return read_int() + InvocationEntryBci; } |
0 | 290 }; |
291 | |
292 // DebugInfoWriteStream specializes CompressedWriteStream for | |
293 // writing debugging information. Used by ScopeDescRecorder. | |
294 | |
295 class DebugInfoWriteStream : public CompressedWriteStream { | |
296 private: | |
297 DebugInformationRecorder* _recorder; | |
298 DebugInformationRecorder* recorder() const { return _recorder; } | |
299 public: | |
300 DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size); | |
301 void write_handle(jobject h); | |
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302 void write_bci(int bci) { write_int(bci - InvocationEntryBci); } |
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303 |
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304 void write_metadata(Metadata* m); |
0 | 305 }; |
1972 | 306 |
307 #endif // SHARE_VM_CODE_DEBUGINFO_HPP |