Mercurial > hg > graal-compiler
comparison src/share/vm/interpreter/bytecode.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | be93aad57795 |
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1 /* | |
2 * Copyright 1997-2002 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 // Base class for different kinds of abstractions working | |
26 // relative to an objects 'this' pointer. | |
27 | |
28 class ThisRelativeObj VALUE_OBJ_CLASS_SPEC { | |
29 private: | |
30 int sign_extend (int x, int size) const { const int s = (BytesPerInt - size)*BitsPerByte; return (x << s) >> s; } | |
31 | |
32 public: | |
33 // Address computation | |
34 address addr_at (int offset) const { return (address)this + offset; } | |
35 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } | |
36 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } | |
37 | |
38 // Java unsigned accessors (using Java spec byte ordering) | |
39 int java_byte_at (int offset) const { return *(jubyte*)addr_at(offset); } | |
40 int java_hwrd_at (int offset) const { return java_byte_at(offset) << (1 * BitsPerByte) | java_byte_at(offset + 1); } | |
41 int java_word_at (int offset) const { return java_hwrd_at(offset) << (2 * BitsPerByte) | java_hwrd_at(offset + 2); } | |
42 | |
43 // Java signed accessors (using Java spec byte ordering) | |
44 int java_signed_byte_at(int offset) const { return sign_extend(java_byte_at(offset), 1); } | |
45 int java_signed_hwrd_at(int offset) const { return sign_extend(java_hwrd_at(offset), 2); } | |
46 int java_signed_word_at(int offset) const { return java_word_at(offset) ; } | |
47 | |
48 // Fast accessors (using the machine's natural byte ordering) | |
49 int fast_byte_at (int offset) const { return *(jubyte *)addr_at(offset); } | |
50 int fast_hwrd_at (int offset) const { return *(jushort*)addr_at(offset); } | |
51 int fast_word_at (int offset) const { return *(juint *)addr_at(offset); } | |
52 | |
53 // Fast signed accessors (using the machine's natural byte ordering) | |
54 int fast_signed_byte_at(int offset) const { return *(jbyte *)addr_at(offset); } | |
55 int fast_signed_hwrd_at(int offset) const { return *(jshort*)addr_at(offset); } | |
56 int fast_signed_word_at(int offset) const { return *(jint *)addr_at(offset); } | |
57 | |
58 // Fast manipulators (using the machine's natural byte ordering) | |
59 void set_fast_byte_at (int offset, int x) const { *(jbyte *)addr_at(offset) = (jbyte )x; } | |
60 void set_fast_hwrd_at (int offset, int x) const { *(jshort*)addr_at(offset) = (jshort)x; } | |
61 void set_fast_word_at (int offset, int x) const { *(jint *)addr_at(offset) = (jint )x; } | |
62 }; | |
63 | |
64 | |
65 // The base class for different kinds of bytecode abstractions. | |
66 // Provides the primitive operations to manipulate code relative | |
67 // to an objects 'this' pointer. | |
68 // | |
69 // Note: Even though it seems that the fast_index & set_fast_index | |
70 // functions are machine specific, they're not. They only use | |
71 // the natural way to store a 16bit index on a given machine, | |
72 // independent of the particular byte ordering. Since all other | |
73 // places in the system that refer to these indices use the | |
74 // same method (the natural byte ordering on the platform) | |
75 // this will always work and be machine-independent). | |
76 | |
77 class Bytecode: public ThisRelativeObj { | |
78 protected: | |
79 u_char byte_at(int offset) const { return *addr_at(offset); } | |
80 bool check_must_rewrite() const; | |
81 | |
82 public: | |
83 // Attributes | |
84 address bcp() const { return addr_at(0); } | |
85 address next_bcp() const { return addr_at(0) + Bytecodes::length_at(bcp()); } | |
86 | |
87 Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); } | |
88 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } | |
89 bool must_rewrite() const { return Bytecodes::can_rewrite(code()) && check_must_rewrite(); } | |
90 bool is_active_breakpoint() const { return Bytecodes::is_active_breakpoint_at(bcp()); } | |
91 | |
92 int one_byte_index() const { return byte_at(1); } | |
93 int two_byte_index() const { return (byte_at(1) << 8) + byte_at(2); } | |
94 int offset() const { return (two_byte_index() << 16) >> 16; } | |
95 address destination() const { return bcp() + offset(); } | |
96 int fast_index() const { return Bytes::get_native_u2(addr_at(1)); } | |
97 | |
98 // Attribute modification | |
99 void set_code(Bytecodes::Code code); | |
100 void set_fast_index(int i); | |
101 | |
102 // Creation | |
103 inline friend Bytecode* Bytecode_at(address bcp); | |
104 }; | |
105 | |
106 inline Bytecode* Bytecode_at(address bcp) { | |
107 return (Bytecode*)bcp; | |
108 } | |
109 | |
110 | |
111 // Abstractions for lookupswitch bytecode | |
112 | |
113 class LookupswitchPair: ThisRelativeObj { | |
114 private: | |
115 int _match; | |
116 int _offset; | |
117 | |
118 public: | |
119 int match() const { return java_signed_word_at(0 * jintSize); } | |
120 int offset() const { return java_signed_word_at(1 * jintSize); } | |
121 }; | |
122 | |
123 | |
124 class Bytecode_lookupswitch: public Bytecode { | |
125 public: | |
126 void verify() const PRODUCT_RETURN; | |
127 | |
128 // Attributes | |
129 int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } | |
130 int number_of_pairs() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } | |
131 LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); | |
132 return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); } | |
133 // Creation | |
134 inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp); | |
135 }; | |
136 | |
137 inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) { | |
138 Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp; | |
139 debug_only(b->verify()); | |
140 return b; | |
141 } | |
142 | |
143 | |
144 class Bytecode_tableswitch: public Bytecode { | |
145 public: | |
146 void verify() const PRODUCT_RETURN; | |
147 | |
148 // Attributes | |
149 int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } | |
150 int low_key() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } | |
151 int high_key() const { return java_signed_word_at(aligned_offset(1 + 2*jintSize)); } | |
152 int dest_offset_at(int i) const; | |
153 int length() { return high_key()-low_key()+1; } | |
154 | |
155 // Creation | |
156 inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp); | |
157 }; | |
158 | |
159 inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) { | |
160 Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp; | |
161 debug_only(b->verify()); | |
162 return b; | |
163 } | |
164 | |
165 | |
166 // Abstraction for invoke_{virtual, static, interface, special} | |
167 | |
168 class Bytecode_invoke: public ResourceObj { | |
169 protected: | |
170 methodHandle _method; // method containing the bytecode | |
171 int _bci; // position of the bytecode | |
172 | |
173 Bytecode_invoke(methodHandle method, int bci) : _method(method), _bci(bci) {} | |
174 | |
175 public: | |
176 void verify() const; | |
177 | |
178 // Attributes | |
179 methodHandle method() const { return _method; } | |
180 int bci() const { return _bci; } | |
181 address bcp() const { return _method->bcp_from(bci()); } | |
182 | |
183 int index() const; // the constant pool index for the invoke | |
184 symbolOop name() const; // returns the name of the invoked method | |
185 symbolOop signature() const; // returns the signature of the invoked method | |
186 BasicType result_type(Thread *thread) const; // returns the result type of the invoke | |
187 | |
188 Bytecodes::Code code() const { return Bytecodes::code_at(bcp(), _method()); } | |
189 Bytecodes::Code adjusted_invoke_code() const { return Bytecodes::java_code(code()); } | |
190 | |
191 methodHandle static_target(TRAPS); // "specified" method (from constant pool) | |
192 | |
193 // Testers | |
194 bool is_invokeinterface() const { return adjusted_invoke_code() == Bytecodes::_invokeinterface; } | |
195 bool is_invokevirtual() const { return adjusted_invoke_code() == Bytecodes::_invokevirtual; } | |
196 bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; } | |
197 bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; } | |
198 | |
199 bool is_valid() const { return is_invokeinterface() || | |
200 is_invokevirtual() || | |
201 is_invokestatic() || | |
202 is_invokespecial(); } | |
203 | |
204 // Creation | |
205 inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci); | |
206 | |
207 // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke. | |
208 inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci); | |
209 }; | |
210 | |
211 inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) { | |
212 Bytecode_invoke* b = new Bytecode_invoke(method, bci); | |
213 debug_only(b->verify()); | |
214 return b; | |
215 } | |
216 | |
217 inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) { | |
218 Bytecode_invoke* b = new Bytecode_invoke(method, bci); | |
219 return b->is_valid() ? b : NULL; | |
220 } | |
221 | |
222 | |
223 // Abstraction for all field accesses (put/get field/static_ | |
224 class Bytecode_field: public Bytecode { | |
225 public: | |
226 void verify() const; | |
227 | |
228 int index() const; | |
229 bool is_static() const; | |
230 | |
231 // Creation | |
232 inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp); | |
233 }; | |
234 | |
235 inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) { | |
236 Bytecode_field* b = (Bytecode_field*)bcp; | |
237 debug_only(b->verify()); | |
238 return b; | |
239 } | |
240 | |
241 | |
242 // Abstraction for {get,put}static | |
243 | |
244 class Bytecode_static: public Bytecode { | |
245 public: | |
246 void verify() const; | |
247 | |
248 // Returns the result type of the send by inspecting the field ref | |
249 BasicType result_type(methodOop method) const; | |
250 | |
251 // Creation | |
252 inline friend Bytecode_static* Bytecode_static_at(const methodOop method, address bcp); | |
253 }; | |
254 | |
255 inline Bytecode_static* Bytecode_static_at(const methodOop method, address bcp) { | |
256 Bytecode_static* b = (Bytecode_static*)bcp; | |
257 debug_only(b->verify()); | |
258 return b; | |
259 } | |
260 | |
261 | |
262 // Abstraction for checkcast | |
263 | |
264 class Bytecode_checkcast: public Bytecode { | |
265 public: | |
266 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); } | |
267 | |
268 // Returns index | |
269 long index() const { return java_hwrd_at(1); }; | |
270 | |
271 // Creation | |
272 inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp); | |
273 }; | |
274 | |
275 inline Bytecode_checkcast* Bytecode_checkcast_at(address bcp) { | |
276 Bytecode_checkcast* b = (Bytecode_checkcast*)bcp; | |
277 debug_only(b->verify()); | |
278 return b; | |
279 } | |
280 | |
281 | |
282 // Abstraction for instanceof | |
283 | |
284 class Bytecode_instanceof: public Bytecode { | |
285 public: | |
286 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); } | |
287 | |
288 // Returns index | |
289 long index() const { return java_hwrd_at(1); }; | |
290 | |
291 // Creation | |
292 inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp); | |
293 }; | |
294 | |
295 inline Bytecode_instanceof* Bytecode_instanceof_at(address bcp) { | |
296 Bytecode_instanceof* b = (Bytecode_instanceof*)bcp; | |
297 debug_only(b->verify()); | |
298 return b; | |
299 } | |
300 | |
301 | |
302 class Bytecode_new: public Bytecode { | |
303 public: | |
304 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); } | |
305 | |
306 // Returns index | |
307 long index() const { return java_hwrd_at(1); }; | |
308 | |
309 // Creation | |
310 inline friend Bytecode_new* Bytecode_new_at(address bcp); | |
311 }; | |
312 | |
313 inline Bytecode_new* Bytecode_new_at(address bcp) { | |
314 Bytecode_new* b = (Bytecode_new*)bcp; | |
315 debug_only(b->verify()); | |
316 return b; | |
317 } | |
318 | |
319 | |
320 class Bytecode_multianewarray: public Bytecode { | |
321 public: | |
322 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); } | |
323 | |
324 // Returns index | |
325 long index() const { return java_hwrd_at(1); }; | |
326 | |
327 // Creation | |
328 inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp); | |
329 }; | |
330 | |
331 inline Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp) { | |
332 Bytecode_multianewarray* b = (Bytecode_multianewarray*)bcp; | |
333 debug_only(b->verify()); | |
334 return b; | |
335 } | |
336 | |
337 | |
338 class Bytecode_anewarray: public Bytecode { | |
339 public: | |
340 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); } | |
341 | |
342 // Returns index | |
343 long index() const { return java_hwrd_at(1); }; | |
344 | |
345 // Creation | |
346 inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp); | |
347 }; | |
348 | |
349 inline Bytecode_anewarray* Bytecode_anewarray_at(address bcp) { | |
350 Bytecode_anewarray* b = (Bytecode_anewarray*)bcp; | |
351 debug_only(b->verify()); | |
352 return b; | |
353 } | |
354 | |
355 | |
356 // Abstraction for ldc, ldc_w and ldc2_w | |
357 | |
358 class Bytecode_loadconstant: public Bytecode { | |
359 public: | |
360 void verify() const { | |
361 Bytecodes::Code stdc = Bytecodes::java_code(code()); | |
362 assert(stdc == Bytecodes::_ldc || | |
363 stdc == Bytecodes::_ldc_w || | |
364 stdc == Bytecodes::_ldc2_w, "load constant"); | |
365 } | |
366 | |
367 int index() const; | |
368 | |
369 inline friend Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp); | |
370 }; | |
371 | |
372 inline Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp) { | |
373 Bytecode_loadconstant* b = (Bytecode_loadconstant*)bcp; | |
374 debug_only(b->verify()); | |
375 return b; | |
376 } |