Mercurial > hg > truffle
annotate src/share/vm/interpreter/bytecode.hpp @ 1565:ab102d5d923e
6939207: refactor constant pool index processing
Summary: Factored cleanup of instruction decode which prepares for enhanced ldc semantics.
Reviewed-by: twisti
author | jrose |
---|---|
date | Sun, 23 May 2010 01:38:26 -0700 |
parents | dd57230ba8fe |
children | e9ff18c4ace7 |
rev | line source |
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0 | 1 /* |
1565 | 2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 * | |
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 public: | |
30 // Address computation | |
31 address addr_at (int offset) const { return (address)this + offset; } | |
1565 | 32 int byte_at (int offset) const { return *(addr_at(offset)); } |
0 | 33 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } |
34 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } | |
35 | |
1565 | 36 // Word access: |
37 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); } | |
38 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); } | |
39 int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); } | |
40 int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); } | |
0 | 41 }; |
42 | |
43 | |
44 // The base class for different kinds of bytecode abstractions. | |
45 // Provides the primitive operations to manipulate code relative | |
46 // to an objects 'this' pointer. | |
1565 | 47 // FIXME: Make this a ResourceObj, include the enclosing methodOop, and cache the opcode. |
0 | 48 |
49 class Bytecode: public ThisRelativeObj { | |
50 protected: | |
51 u_char byte_at(int offset) const { return *addr_at(offset); } | |
1565 | 52 bool check_must_rewrite(Bytecodes::Code bc) const; |
0 | 53 |
54 public: | |
55 // Attributes | |
56 address bcp() const { return addr_at(0); } | |
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57 int instruction_size() const { return Bytecodes::length_at(bcp()); } |
0 | 58 |
1565 | 59 // Warning: Use code() with caution on live bytecode streams. 4926272 |
0 | 60 Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); } |
61 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } | |
1565 | 62 bool must_rewrite(Bytecodes::Code code) const { return Bytecodes::can_rewrite(code) && check_must_rewrite(code); } |
0 | 63 |
64 // Creation | |
65 inline friend Bytecode* Bytecode_at(address bcp); | |
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66 |
1565 | 67 // Static functions for parsing bytecodes in place. |
68 int get_index_u1(Bytecodes::Code bc) const { | |
69 assert_same_format_as(bc); assert_index_size(1, bc); | |
70 return *(jubyte*)addr_at(1); | |
71 } | |
72 int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const { | |
73 assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide); | |
74 address p = addr_at(is_wide ? 2 : 1); | |
75 if (can_use_native_byte_order(bc, is_wide)) | |
76 return Bytes::get_native_u2(p); | |
77 else return Bytes::get_Java_u2(p); | |
78 } | |
79 int get_index_u2_cpcache(Bytecodes::Code bc) const { | |
80 assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc); | |
81 return Bytes::get_native_u2(addr_at(1)) DEBUG_ONLY(+ constantPoolOopDesc::CPCACHE_INDEX_TAG); | |
82 } | |
83 int get_index_u4(Bytecodes::Code bc) const { | |
84 assert_same_format_as(bc); assert_index_size(4, bc); | |
85 assert(can_use_native_byte_order(bc), ""); | |
86 return Bytes::get_native_u4(addr_at(1)); | |
87 } | |
88 bool has_index_u4(Bytecodes::Code bc) const { | |
89 return bc == Bytecodes::_invokedynamic; | |
90 } | |
91 | |
92 int get_offset_s2(Bytecodes::Code bc) const { | |
93 assert_same_format_as(bc); assert_offset_size(2, bc); | |
94 return (jshort) Bytes::get_Java_u2(addr_at(1)); | |
95 } | |
96 int get_offset_s4(Bytecodes::Code bc) const { | |
97 assert_same_format_as(bc); assert_offset_size(4, bc); | |
98 return (jint) Bytes::get_Java_u4(addr_at(1)); | |
99 } | |
100 | |
101 int get_constant_u1(int offset, Bytecodes::Code bc) const { | |
102 assert_same_format_as(bc); assert_constant_size(1, offset, bc); | |
103 return *(jbyte*)addr_at(offset); | |
104 } | |
105 int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const { | |
106 assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide); | |
107 return (jshort) Bytes::get_Java_u2(addr_at(offset)); | |
108 } | |
109 | |
110 // These are used locally and also from bytecode streams. | |
111 void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN; | |
112 static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
113 static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
114 static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
115 static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
116 static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) { | |
117 return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/)); | |
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118 } |
0 | 119 }; |
120 | |
121 inline Bytecode* Bytecode_at(address bcp) { | |
1565 | 122 // Warning: Use with caution on live bytecode streams. 4926272 |
0 | 123 return (Bytecode*)bcp; |
124 } | |
125 | |
126 | |
127 // Abstractions for lookupswitch bytecode | |
128 | |
129 class LookupswitchPair: ThisRelativeObj { | |
130 private: | |
131 int _match; | |
132 int _offset; | |
133 | |
134 public: | |
1565 | 135 int match() const { return get_Java_u4_at(0 * jintSize); } |
136 int offset() const { return get_Java_u4_at(1 * jintSize); } | |
0 | 137 }; |
138 | |
139 | |
140 class Bytecode_lookupswitch: public Bytecode { | |
141 public: | |
142 void verify() const PRODUCT_RETURN; | |
143 | |
144 // Attributes | |
1565 | 145 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } |
146 int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } | |
0 | 147 LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); |
148 return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); } | |
149 // Creation | |
150 inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp); | |
151 }; | |
152 | |
153 inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) { | |
154 Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp; | |
155 debug_only(b->verify()); | |
156 return b; | |
157 } | |
158 | |
159 | |
160 class Bytecode_tableswitch: public Bytecode { | |
161 public: | |
162 void verify() const PRODUCT_RETURN; | |
163 | |
164 // Attributes | |
1565 | 165 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } |
166 int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } | |
167 int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); } | |
0 | 168 int dest_offset_at(int i) const; |
169 int length() { return high_key()-low_key()+1; } | |
170 | |
171 // Creation | |
172 inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp); | |
173 }; | |
174 | |
175 inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) { | |
176 Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp; | |
177 debug_only(b->verify()); | |
178 return b; | |
179 } | |
180 | |
181 | |
182 // Abstraction for invoke_{virtual, static, interface, special} | |
183 | |
184 class Bytecode_invoke: public ResourceObj { | |
185 protected: | |
186 methodHandle _method; // method containing the bytecode | |
187 int _bci; // position of the bytecode | |
188 | |
189 Bytecode_invoke(methodHandle method, int bci) : _method(method), _bci(bci) {} | |
190 | |
191 public: | |
192 void verify() const; | |
193 | |
194 // Attributes | |
195 methodHandle method() const { return _method; } | |
196 int bci() const { return _bci; } | |
197 address bcp() const { return _method->bcp_from(bci()); } | |
198 | |
199 int index() const; // the constant pool index for the invoke | |
200 symbolOop name() const; // returns the name of the invoked method | |
201 symbolOop signature() const; // returns the signature of the invoked method | |
202 BasicType result_type(Thread *thread) const; // returns the result type of the invoke | |
203 | |
204 Bytecodes::Code code() const { return Bytecodes::code_at(bcp(), _method()); } | |
205 Bytecodes::Code adjusted_invoke_code() const { return Bytecodes::java_code(code()); } | |
206 | |
207 methodHandle static_target(TRAPS); // "specified" method (from constant pool) | |
208 | |
209 // Testers | |
210 bool is_invokeinterface() const { return adjusted_invoke_code() == Bytecodes::_invokeinterface; } | |
211 bool is_invokevirtual() const { return adjusted_invoke_code() == Bytecodes::_invokevirtual; } | |
212 bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; } | |
213 bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; } | |
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214 bool is_invokedynamic() const { return adjusted_invoke_code() == Bytecodes::_invokedynamic; } |
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215 |
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216 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); } |
0 | 217 |
218 bool is_valid() const { return is_invokeinterface() || | |
219 is_invokevirtual() || | |
220 is_invokestatic() || | |
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221 is_invokespecial() || |
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222 is_invokedynamic(); } |
0 | 223 |
224 // Creation | |
225 inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci); | |
226 | |
227 // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke. | |
228 inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci); | |
229 }; | |
230 | |
231 inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) { | |
232 Bytecode_invoke* b = new Bytecode_invoke(method, bci); | |
233 debug_only(b->verify()); | |
234 return b; | |
235 } | |
236 | |
237 inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) { | |
238 Bytecode_invoke* b = new Bytecode_invoke(method, bci); | |
239 return b->is_valid() ? b : NULL; | |
240 } | |
241 | |
242 | |
243 // Abstraction for all field accesses (put/get field/static_ | |
244 class Bytecode_field: public Bytecode { | |
245 public: | |
246 void verify() const; | |
247 | |
248 int index() const; | |
249 bool is_static() const; | |
250 | |
251 // Creation | |
252 inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp); | |
253 }; | |
254 | |
255 inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) { | |
256 Bytecode_field* b = (Bytecode_field*)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 | |
1565 | 269 long index() const { return get_index_u2(Bytecodes::_checkcast); }; |
0 | 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 | |
1565 | 289 long index() const { return get_index_u2(Bytecodes::_instanceof); }; |
0 | 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 | |
1565 | 307 long index() const { return get_index_u2(Bytecodes::_new); }; |
0 | 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 | |
1565 | 325 long index() const { return get_index_u2(Bytecodes::_multianewarray); }; |
0 | 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 | |
1565 | 343 long index() const { return get_index_u2(Bytecodes::_anewarray); }; |
0 | 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 } |