Mercurial > hg > truffle
annotate src/share/vm/ci/ciStreams.cpp @ 1293:51db1e4b379d
6932536: JSR 292 modified JDK MethodHandlesTest fails on x86_64
Summary: A modified MethodHandlesTest revealed two bugs on x86_64.
Reviewed-by: never, jrose
author | twisti |
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date | Mon, 08 Mar 2010 04:46:30 -0800 |
parents | dd57230ba8fe |
children | c18cbe5936b8 ab102d5d923e |
rev | line source |
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0 | 1 /* |
844 | 2 * Copyright 1999-2009 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 #include "incls/_precompiled.incl" | |
26 #include "incls/_ciStreams.cpp.incl" | |
27 | |
28 // ciExceptionHandlerStream | |
29 // | |
30 // Walk over some selected set of a methods exception handlers. | |
31 | |
32 // ------------------------------------------------------------------ | |
33 // ciExceptionHandlerStream::count | |
34 // | |
35 // How many exception handlers are there in this stream? | |
36 // | |
37 // Implementation note: Compiler2 needs this functionality, so I had | |
38 int ciExceptionHandlerStream::count() { | |
39 int save_pos = _pos; | |
40 int save_end = _end; | |
41 | |
42 int count = 0; | |
43 | |
44 _pos = -1; | |
45 _end = _method->_handler_count; | |
46 | |
47 | |
48 next(); | |
49 while (!is_done()) { | |
50 count++; | |
51 next(); | |
52 } | |
53 | |
54 _pos = save_pos; | |
55 _end = save_end; | |
56 | |
57 return count; | |
58 } | |
59 | |
60 int ciExceptionHandlerStream::count_remaining() { | |
61 int save_pos = _pos; | |
62 int save_end = _end; | |
63 | |
64 int count = 0; | |
65 | |
66 while (!is_done()) { | |
67 count++; | |
68 next(); | |
69 } | |
70 | |
71 _pos = save_pos; | |
72 _end = save_end; | |
73 | |
74 return count; | |
75 } | |
76 | |
77 // ciBytecodeStream | |
78 // | |
79 // The class is used to iterate over the bytecodes of a method. | |
80 // It hides the details of constant pool structure/access by | |
81 // providing accessors for constant pool items. | |
82 | |
83 // ------------------------------------------------------------------ | |
84 // ciBytecodeStream::wide | |
85 // | |
86 // Special handling for the wide bytcode | |
87 Bytecodes::Code ciBytecodeStream::wide() | |
88 { | |
89 // Get following bytecode; do not return wide | |
90 Bytecodes::Code bc = (Bytecodes::Code)_pc[1]; | |
91 _pc += 2; // Skip both bytecodes | |
92 _pc += 2; // Skip index always | |
93 if( bc == Bytecodes::_iinc ) | |
94 _pc += 2; // Skip optional constant | |
95 _was_wide = _pc; // Flag last wide bytecode found | |
96 return bc; | |
97 } | |
98 | |
99 // ------------------------------------------------------------------ | |
100 // ciBytecodeStream::table | |
101 // | |
102 // Special handling for switch ops | |
103 Bytecodes::Code ciBytecodeStream::table( Bytecodes::Code bc ) { | |
104 switch( bc ) { // Check for special bytecode handling | |
105 | |
106 case Bytecodes::_lookupswitch: | |
107 _pc++; // Skip wide bytecode | |
108 _pc += (_start-_pc)&3; // Word align | |
109 _table_base = (jint*)_pc; // Capture for later usage | |
110 // table_base[0] is default far_dest | |
111 // Table has 2 lead elements (default, length), then pairs of u4 values. | |
112 // So load table length, and compute address at end of table | |
113 _pc = (address)&_table_base[2+ 2*Bytes::get_Java_u4((address)&_table_base[1])]; | |
114 break; | |
115 | |
116 case Bytecodes::_tableswitch: { | |
117 _pc++; // Skip wide bytecode | |
118 _pc += (_start-_pc)&3; // Word align | |
119 _table_base = (jint*)_pc; // Capture for later usage | |
120 // table_base[0] is default far_dest | |
121 int lo = Bytes::get_Java_u4((address)&_table_base[1]);// Low bound | |
122 int hi = Bytes::get_Java_u4((address)&_table_base[2]);// High bound | |
123 int len = hi - lo + 1; // Dense table size | |
124 _pc = (address)&_table_base[3+len]; // Skip past table | |
125 break; | |
126 } | |
127 | |
128 default: | |
129 fatal("unhandled bytecode"); | |
130 } | |
131 return bc; | |
132 } | |
133 | |
134 // ------------------------------------------------------------------ | |
135 // ciBytecodeStream::reset_to_bci | |
136 void ciBytecodeStream::reset_to_bci( int bci ) { | |
137 _bc_start=_was_wide=0; | |
138 _pc = _start+bci; | |
139 } | |
140 | |
141 // ------------------------------------------------------------------ | |
142 // ciBytecodeStream::force_bci | |
143 void ciBytecodeStream::force_bci(int bci) { | |
144 if (bci < 0) { | |
145 reset_to_bci(0); | |
146 _bc_start = _start + bci; | |
147 _bc = EOBC(); | |
148 } else { | |
149 reset_to_bci(bci); | |
150 next(); | |
151 } | |
152 } | |
153 | |
154 | |
155 // ------------------------------------------------------------------ | |
156 // Constant pool access | |
157 // ------------------------------------------------------------------ | |
158 | |
159 // ------------------------------------------------------------------ | |
160 // ciBytecodeStream::get_klass_index | |
161 // | |
162 // If this bytecodes references a klass, return the index of the | |
163 // referenced klass. | |
164 int ciBytecodeStream::get_klass_index() const { | |
165 switch(cur_bc()) { | |
166 case Bytecodes::_ldc: | |
167 return get_index(); | |
168 case Bytecodes::_ldc_w: | |
169 case Bytecodes::_ldc2_w: | |
170 case Bytecodes::_checkcast: | |
171 case Bytecodes::_instanceof: | |
172 case Bytecodes::_anewarray: | |
173 case Bytecodes::_multianewarray: | |
174 case Bytecodes::_new: | |
175 case Bytecodes::_newarray: | |
176 return get_index_big(); | |
177 default: | |
178 ShouldNotReachHere(); | |
179 return 0; | |
180 } | |
181 } | |
182 | |
183 // ------------------------------------------------------------------ | |
184 // ciBytecodeStream::get_klass | |
185 // | |
186 // If this bytecode is a new, newarray, multianewarray, instanceof, | |
187 // or checkcast, get the referenced klass. | |
188 ciKlass* ciBytecodeStream::get_klass(bool& will_link) { | |
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189 VM_ENTRY_MARK; |
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190 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
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191 return CURRENT_ENV->get_klass_by_index(cpool, get_klass_index(), will_link, _holder); |
0 | 192 } |
193 | |
194 // ------------------------------------------------------------------ | |
195 // ciBytecodeStream::get_constant_index | |
196 // | |
197 // If this bytecode is one of the ldc variants, get the index of the | |
198 // referenced constant. | |
199 int ciBytecodeStream::get_constant_index() const { | |
200 switch(cur_bc()) { | |
201 case Bytecodes::_ldc: | |
202 return get_index(); | |
203 case Bytecodes::_ldc_w: | |
204 case Bytecodes::_ldc2_w: | |
205 return get_index_big(); | |
206 default: | |
207 ShouldNotReachHere(); | |
208 return 0; | |
209 } | |
210 } | |
211 // ------------------------------------------------------------------ | |
212 // ciBytecodeStream::get_constant | |
213 // | |
214 // If this bytecode is one of the ldc variants, get the referenced | |
215 // constant. | |
216 ciConstant ciBytecodeStream::get_constant() { | |
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217 VM_ENTRY_MARK; |
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218 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
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219 return CURRENT_ENV->get_constant_by_index(cpool, get_constant_index(), _holder); |
0 | 220 } |
221 | |
222 // ------------------------------------------------------------------ | |
223 bool ciBytecodeStream::is_unresolved_string() const { | |
224 return CURRENT_ENV->is_unresolved_string(_holder, get_constant_index()); | |
225 } | |
226 | |
227 // ------------------------------------------------------------------ | |
228 bool ciBytecodeStream::is_unresolved_klass() const { | |
229 return CURRENT_ENV->is_unresolved_klass(_holder, get_klass_index()); | |
230 } | |
231 | |
232 // ------------------------------------------------------------------ | |
233 // ciBytecodeStream::get_field_index | |
234 // | |
235 // If this is a field access bytecode, get the constant pool | |
236 // index of the referenced field. | |
237 int ciBytecodeStream::get_field_index() { | |
238 assert(cur_bc() == Bytecodes::_getfield || | |
239 cur_bc() == Bytecodes::_putfield || | |
240 cur_bc() == Bytecodes::_getstatic || | |
241 cur_bc() == Bytecodes::_putstatic, "wrong bc"); | |
242 return get_index_big(); | |
243 } | |
244 | |
245 | |
246 // ------------------------------------------------------------------ | |
247 // ciBytecodeStream::get_field | |
248 // | |
249 // If this bytecode is one of get_field, get_static, put_field, | |
250 // or put_static, get the referenced field. | |
251 ciField* ciBytecodeStream::get_field(bool& will_link) { | |
252 ciField* f = CURRENT_ENV->get_field_by_index(_holder, get_field_index()); | |
253 will_link = f->will_link(_holder, _bc); | |
254 return f; | |
255 } | |
256 | |
257 | |
258 // ------------------------------------------------------------------ | |
259 // ciBytecodeStream::get_declared_field_holder | |
260 // | |
261 // Get the declared holder of the currently referenced field. | |
262 // | |
263 // Usage note: the holder() of a ciField class returns the canonical | |
264 // holder of the field, rather than the holder declared in the | |
265 // bytecodes. | |
266 // | |
267 // There is no "will_link" result passed back. The user is responsible | |
268 // for checking linkability when retrieving the associated field. | |
269 ciInstanceKlass* ciBytecodeStream::get_declared_field_holder() { | |
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270 VM_ENTRY_MARK; |
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271 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
0 | 272 int holder_index = get_field_holder_index(); |
273 bool ignore; | |
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274 return CURRENT_ENV->get_klass_by_index(cpool, holder_index, ignore, _holder) |
0 | 275 ->as_instance_klass(); |
276 } | |
277 | |
278 // ------------------------------------------------------------------ | |
279 // ciBytecodeStream::get_field_holder_index | |
280 // | |
281 // Get the constant pool index of the declared holder of the field | |
282 // referenced by the current bytecode. Used for generating | |
283 // deoptimization information. | |
284 int ciBytecodeStream::get_field_holder_index() { | |
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285 GUARDED_VM_ENTRY( |
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286 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); |
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287 return cpool->klass_ref_index_at(get_field_index()); |
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288 ) |
0 | 289 } |
290 | |
291 // ------------------------------------------------------------------ | |
292 // ciBytecodeStream::get_field_signature_index | |
293 // | |
294 // Get the constant pool index of the signature of the field | |
295 // referenced by the current bytecode. Used for generating | |
296 // deoptimization information. | |
297 int ciBytecodeStream::get_field_signature_index() { | |
298 VM_ENTRY_MARK; | |
299 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
300 int nt_index = cpool->name_and_type_ref_index_at(get_field_index()); | |
301 return cpool->signature_ref_index_at(nt_index); | |
302 } | |
303 | |
304 // ------------------------------------------------------------------ | |
305 // ciBytecodeStream::get_method_index | |
306 // | |
307 // If this is a method invocation bytecode, get the constant pool | |
308 // index of the invoked method. | |
309 int ciBytecodeStream::get_method_index() { | |
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310 #ifdef ASSERT |
0 | 311 switch (cur_bc()) { |
312 case Bytecodes::_invokeinterface: | |
313 case Bytecodes::_invokevirtual: | |
314 case Bytecodes::_invokespecial: | |
315 case Bytecodes::_invokestatic: | |
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316 case Bytecodes::_invokedynamic: |
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317 break; |
0 | 318 default: |
319 ShouldNotReachHere(); | |
320 } | |
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321 #endif |
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322 return get_index_int(); |
0 | 323 } |
324 | |
325 // ------------------------------------------------------------------ | |
326 // ciBytecodeStream::get_method | |
327 // | |
328 // If this is a method invocation bytecode, get the invoked method. | |
329 ciMethod* ciBytecodeStream::get_method(bool& will_link) { | |
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330 VM_ENTRY_MARK; |
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331 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
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332 ciMethod* m = CURRENT_ENV->get_method_by_index(cpool, get_method_index(), cur_bc(), _holder); |
0 | 333 will_link = m->is_loaded(); |
334 return m; | |
335 } | |
336 | |
337 // ------------------------------------------------------------------ | |
338 // ciBytecodeStream::get_declared_method_holder | |
339 // | |
340 // Get the declared holder of the currently referenced method. | |
341 // | |
342 // Usage note: the holder() of a ciMethod class returns the canonical | |
343 // holder of the method, rather than the holder declared in the | |
344 // bytecodes. | |
345 // | |
346 // There is no "will_link" result passed back. The user is responsible | |
347 // for checking linkability when retrieving the associated method. | |
348 ciKlass* ciBytecodeStream::get_declared_method_holder() { | |
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349 VM_ENTRY_MARK; |
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350 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
0 | 351 bool ignore; |
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352 // report as InvokeDynamic for invokedynamic, which is syntactically classless |
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353 if (cur_bc() == Bytecodes::_invokedynamic) |
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354 return CURRENT_ENV->get_klass_by_name(_holder, ciSymbol::java_dyn_InvokeDynamic(), false); |
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355 return CURRENT_ENV->get_klass_by_index(cpool, get_method_holder_index(), ignore, _holder); |
0 | 356 } |
357 | |
358 // ------------------------------------------------------------------ | |
359 // ciBytecodeStream::get_method_holder_index | |
360 // | |
361 // Get the constant pool index of the declared holder of the method | |
362 // referenced by the current bytecode. Used for generating | |
363 // deoptimization information. | |
364 int ciBytecodeStream::get_method_holder_index() { | |
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365 constantPoolOop cpool = _method->get_methodOop()->constants(); |
0 | 366 return cpool->klass_ref_index_at(get_method_index()); |
367 } | |
368 | |
369 // ------------------------------------------------------------------ | |
370 // ciBytecodeStream::get_method_signature_index | |
371 // | |
372 // Get the constant pool index of the signature of the method | |
373 // referenced by the current bytecode. Used for generating | |
374 // deoptimization information. | |
375 int ciBytecodeStream::get_method_signature_index() { | |
376 VM_ENTRY_MARK; | |
377 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
378 int method_index = get_method_index(); | |
379 int name_and_type_index = cpool->name_and_type_ref_index_at(method_index); | |
380 return cpool->signature_ref_index_at(name_and_type_index); | |
381 } | |
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382 |
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383 // ------------------------------------------------------------------ |
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384 // ciBytecodeStream::get_cpcache |
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385 ciCPCache* ciBytecodeStream::get_cpcache() { |
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386 VM_ENTRY_MARK; |
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387 // Get the constant pool. |
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388 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); |
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389 constantPoolCacheOop cpcache = cpool->cache(); |
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390 |
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391 return CURRENT_ENV->get_object(cpcache)->as_cpcache(); |
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392 } |
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393 |
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394 // ------------------------------------------------------------------ |
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395 // ciBytecodeStream::get_call_site |
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396 ciCallSite* ciBytecodeStream::get_call_site() { |
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397 VM_ENTRY_MARK; |
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398 // Get the constant pool. |
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399 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); |
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400 constantPoolCacheOop cpcache = cpool->cache(); |
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401 |
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402 // Get the CallSite from the constant pool cache. |
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403 int method_index = get_method_index(); |
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404 ConstantPoolCacheEntry* cpcache_entry = cpcache->secondary_entry_at(method_index); |
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405 oop call_site_oop = cpcache_entry->f1(); |
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406 |
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407 // Create a CallSite object and return it. |
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408 return CURRENT_ENV->get_object(call_site_oop)->as_call_site(); |
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409 } |