Mercurial > hg > truffle
annotate src/share/vm/interpreter/templateInterpreter.cpp @ 4724:0841c0ec2ed6
7123810: new hotspot build - hs23-b10
Reviewed-by: jcoomes
author | amurillo |
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date | Fri, 23 Dec 2011 15:29:34 -0800 |
parents | d83ac25d0304 |
children | 6759698e3140 |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, 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 * | |
1552
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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 #include "precompiled.hpp" |
26 #include "interpreter/interpreter.hpp" | |
27 #include "interpreter/interpreterGenerator.hpp" | |
28 #include "interpreter/interpreterRuntime.hpp" | |
29 #include "interpreter/templateTable.hpp" | |
0 | 30 |
31 #ifndef CC_INTERP | |
32 | |
33 # define __ _masm-> | |
34 | |
35 void TemplateInterpreter::initialize() { | |
36 if (_code != NULL) return; | |
37 // assertions | |
38 assert((int)Bytecodes::number_of_codes <= (int)DispatchTable::length, | |
39 "dispatch table too small"); | |
40 | |
41 AbstractInterpreter::initialize(); | |
42 | |
43 TemplateTable::initialize(); | |
44 | |
45 // generate interpreter | |
46 { ResourceMark rm; | |
47 TraceTime timer("Interpreter generation", TraceStartupTime); | |
48 int code_size = InterpreterCodeSize; | |
49 NOT_PRODUCT(code_size *= 4;) // debug uses extra interpreter code space | |
50 _code = new StubQueue(new InterpreterCodeletInterface, code_size, NULL, | |
51 "Interpreter"); | |
52 InterpreterGenerator g(_code); | |
53 if (PrintInterpreter) print(); | |
54 } | |
55 | |
56 // initialize dispatch table | |
57 _active_table = _normal_table; | |
58 } | |
59 | |
60 //------------------------------------------------------------------------------------------------------------------------ | |
61 // Implementation of EntryPoint | |
62 | |
63 EntryPoint::EntryPoint() { | |
64 assert(number_of_states == 9, "check the code below"); | |
65 _entry[btos] = NULL; | |
66 _entry[ctos] = NULL; | |
67 _entry[stos] = NULL; | |
68 _entry[atos] = NULL; | |
69 _entry[itos] = NULL; | |
70 _entry[ltos] = NULL; | |
71 _entry[ftos] = NULL; | |
72 _entry[dtos] = NULL; | |
73 _entry[vtos] = NULL; | |
74 } | |
75 | |
76 | |
77 EntryPoint::EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry) { | |
78 assert(number_of_states == 9, "check the code below"); | |
79 _entry[btos] = bentry; | |
80 _entry[ctos] = centry; | |
81 _entry[stos] = sentry; | |
82 _entry[atos] = aentry; | |
83 _entry[itos] = ientry; | |
84 _entry[ltos] = lentry; | |
85 _entry[ftos] = fentry; | |
86 _entry[dtos] = dentry; | |
87 _entry[vtos] = ventry; | |
88 } | |
89 | |
90 | |
91 void EntryPoint::set_entry(TosState state, address entry) { | |
92 assert(0 <= state && state < number_of_states, "state out of bounds"); | |
93 _entry[state] = entry; | |
94 } | |
95 | |
96 | |
97 address EntryPoint::entry(TosState state) const { | |
98 assert(0 <= state && state < number_of_states, "state out of bounds"); | |
99 return _entry[state]; | |
100 } | |
101 | |
102 | |
103 void EntryPoint::print() { | |
104 tty->print("["); | |
105 for (int i = 0; i < number_of_states; i++) { | |
106 if (i > 0) tty->print(", "); | |
107 tty->print(INTPTR_FORMAT, _entry[i]); | |
108 } | |
109 tty->print("]"); | |
110 } | |
111 | |
112 | |
113 bool EntryPoint::operator == (const EntryPoint& y) { | |
114 int i = number_of_states; | |
115 while (i-- > 0) { | |
116 if (_entry[i] != y._entry[i]) return false; | |
117 } | |
118 return true; | |
119 } | |
120 | |
121 | |
122 //------------------------------------------------------------------------------------------------------------------------ | |
123 // Implementation of DispatchTable | |
124 | |
125 EntryPoint DispatchTable::entry(int i) const { | |
126 assert(0 <= i && i < length, "index out of bounds"); | |
127 return | |
128 EntryPoint( | |
129 _table[btos][i], | |
130 _table[ctos][i], | |
131 _table[stos][i], | |
132 _table[atos][i], | |
133 _table[itos][i], | |
134 _table[ltos][i], | |
135 _table[ftos][i], | |
136 _table[dtos][i], | |
137 _table[vtos][i] | |
138 ); | |
139 } | |
140 | |
141 | |
142 void DispatchTable::set_entry(int i, EntryPoint& entry) { | |
143 assert(0 <= i && i < length, "index out of bounds"); | |
144 assert(number_of_states == 9, "check the code below"); | |
145 _table[btos][i] = entry.entry(btos); | |
146 _table[ctos][i] = entry.entry(ctos); | |
147 _table[stos][i] = entry.entry(stos); | |
148 _table[atos][i] = entry.entry(atos); | |
149 _table[itos][i] = entry.entry(itos); | |
150 _table[ltos][i] = entry.entry(ltos); | |
151 _table[ftos][i] = entry.entry(ftos); | |
152 _table[dtos][i] = entry.entry(dtos); | |
153 _table[vtos][i] = entry.entry(vtos); | |
154 } | |
155 | |
156 | |
157 bool DispatchTable::operator == (DispatchTable& y) { | |
158 int i = length; | |
159 while (i-- > 0) { | |
160 EntryPoint t = y.entry(i); // for compiler compatibility (BugId 4150096) | |
161 if (!(entry(i) == t)) return false; | |
162 } | |
163 return true; | |
164 } | |
165 | |
166 address TemplateInterpreter::_remove_activation_entry = NULL; | |
167 address TemplateInterpreter::_remove_activation_preserving_args_entry = NULL; | |
168 | |
169 | |
170 address TemplateInterpreter::_throw_ArrayIndexOutOfBoundsException_entry = NULL; | |
171 address TemplateInterpreter::_throw_ArrayStoreException_entry = NULL; | |
172 address TemplateInterpreter::_throw_ArithmeticException_entry = NULL; | |
173 address TemplateInterpreter::_throw_ClassCastException_entry = NULL; | |
174 address TemplateInterpreter::_throw_NullPointerException_entry = NULL; | |
175 address TemplateInterpreter::_throw_StackOverflowError_entry = NULL; | |
176 address TemplateInterpreter::_throw_exception_entry = NULL; | |
177 | |
178 #ifndef PRODUCT | |
179 EntryPoint TemplateInterpreter::_trace_code; | |
180 #endif // !PRODUCT | |
181 EntryPoint TemplateInterpreter::_return_entry[TemplateInterpreter::number_of_return_entries]; | |
182 EntryPoint TemplateInterpreter::_earlyret_entry; | |
183 EntryPoint TemplateInterpreter::_deopt_entry [TemplateInterpreter::number_of_deopt_entries ]; | |
184 EntryPoint TemplateInterpreter::_continuation_entry; | |
185 EntryPoint TemplateInterpreter::_safept_entry; | |
186 | |
187 address TemplateInterpreter::_return_3_addrs_by_index[TemplateInterpreter::number_of_return_addrs]; | |
188 address TemplateInterpreter::_return_5_addrs_by_index[TemplateInterpreter::number_of_return_addrs]; | |
189 | |
190 DispatchTable TemplateInterpreter::_active_table; | |
191 DispatchTable TemplateInterpreter::_normal_table; | |
192 DispatchTable TemplateInterpreter::_safept_table; | |
193 address TemplateInterpreter::_wentry_point[DispatchTable::length]; | |
194 | |
195 TemplateInterpreterGenerator::TemplateInterpreterGenerator(StubQueue* _code): AbstractInterpreterGenerator(_code) { | |
196 _unimplemented_bytecode = NULL; | |
197 _illegal_bytecode_sequence = NULL; | |
198 } | |
199 | |
200 static const BasicType types[Interpreter::number_of_result_handlers] = { | |
201 T_BOOLEAN, | |
202 T_CHAR , | |
203 T_BYTE , | |
204 T_SHORT , | |
205 T_INT , | |
206 T_LONG , | |
207 T_VOID , | |
208 T_FLOAT , | |
209 T_DOUBLE , | |
210 T_OBJECT | |
211 }; | |
212 | |
213 void TemplateInterpreterGenerator::generate_all() { | |
214 AbstractInterpreterGenerator::generate_all(); | |
215 | |
216 { CodeletMark cm(_masm, "error exits"); | |
217 _unimplemented_bytecode = generate_error_exit("unimplemented bytecode"); | |
218 _illegal_bytecode_sequence = generate_error_exit("illegal bytecode sequence - method not verified"); | |
219 } | |
220 | |
221 #ifndef PRODUCT | |
222 if (TraceBytecodes) { | |
223 CodeletMark cm(_masm, "bytecode tracing support"); | |
224 Interpreter::_trace_code = | |
225 EntryPoint( | |
226 generate_trace_code(btos), | |
227 generate_trace_code(ctos), | |
228 generate_trace_code(stos), | |
229 generate_trace_code(atos), | |
230 generate_trace_code(itos), | |
231 generate_trace_code(ltos), | |
232 generate_trace_code(ftos), | |
233 generate_trace_code(dtos), | |
234 generate_trace_code(vtos) | |
235 ); | |
236 } | |
237 #endif // !PRODUCT | |
238 | |
239 { CodeletMark cm(_masm, "return entry points"); | |
240 for (int i = 0; i < Interpreter::number_of_return_entries; i++) { | |
241 Interpreter::_return_entry[i] = | |
242 EntryPoint( | |
243 generate_return_entry_for(itos, i), | |
244 generate_return_entry_for(itos, i), | |
245 generate_return_entry_for(itos, i), | |
246 generate_return_entry_for(atos, i), | |
247 generate_return_entry_for(itos, i), | |
248 generate_return_entry_for(ltos, i), | |
249 generate_return_entry_for(ftos, i), | |
250 generate_return_entry_for(dtos, i), | |
251 generate_return_entry_for(vtos, i) | |
252 ); | |
253 } | |
254 } | |
255 | |
256 { CodeletMark cm(_masm, "earlyret entry points"); | |
257 Interpreter::_earlyret_entry = | |
258 EntryPoint( | |
259 generate_earlyret_entry_for(btos), | |
260 generate_earlyret_entry_for(ctos), | |
261 generate_earlyret_entry_for(stos), | |
262 generate_earlyret_entry_for(atos), | |
263 generate_earlyret_entry_for(itos), | |
264 generate_earlyret_entry_for(ltos), | |
265 generate_earlyret_entry_for(ftos), | |
266 generate_earlyret_entry_for(dtos), | |
267 generate_earlyret_entry_for(vtos) | |
268 ); | |
269 } | |
270 | |
271 { CodeletMark cm(_masm, "deoptimization entry points"); | |
272 for (int i = 0; i < Interpreter::number_of_deopt_entries; i++) { | |
273 Interpreter::_deopt_entry[i] = | |
274 EntryPoint( | |
275 generate_deopt_entry_for(itos, i), | |
276 generate_deopt_entry_for(itos, i), | |
277 generate_deopt_entry_for(itos, i), | |
278 generate_deopt_entry_for(atos, i), | |
279 generate_deopt_entry_for(itos, i), | |
280 generate_deopt_entry_for(ltos, i), | |
281 generate_deopt_entry_for(ftos, i), | |
282 generate_deopt_entry_for(dtos, i), | |
283 generate_deopt_entry_for(vtos, i) | |
284 ); | |
285 } | |
286 } | |
287 | |
288 { CodeletMark cm(_masm, "result handlers for native calls"); | |
289 // The various result converter stublets. | |
290 int is_generated[Interpreter::number_of_result_handlers]; | |
291 memset(is_generated, 0, sizeof(is_generated)); | |
292 | |
293 for (int i = 0; i < Interpreter::number_of_result_handlers; i++) { | |
294 BasicType type = types[i]; | |
295 if (!is_generated[Interpreter::BasicType_as_index(type)]++) { | |
296 Interpreter::_native_abi_to_tosca[Interpreter::BasicType_as_index(type)] = generate_result_handler_for(type); | |
297 } | |
298 } | |
299 } | |
300 | |
301 for (int j = 0; j < number_of_states; j++) { | |
302 const TosState states[] = {btos, ctos, stos, itos, ltos, ftos, dtos, atos, vtos}; | |
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303 int index = Interpreter::TosState_as_index(states[j]); |
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304 Interpreter::_return_3_addrs_by_index[index] = Interpreter::return_entry(states[j], 3); |
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305 Interpreter::_return_5_addrs_by_index[index] = Interpreter::return_entry(states[j], 5); |
0 | 306 } |
307 | |
308 { CodeletMark cm(_masm, "continuation entry points"); | |
309 Interpreter::_continuation_entry = | |
310 EntryPoint( | |
311 generate_continuation_for(btos), | |
312 generate_continuation_for(ctos), | |
313 generate_continuation_for(stos), | |
314 generate_continuation_for(atos), | |
315 generate_continuation_for(itos), | |
316 generate_continuation_for(ltos), | |
317 generate_continuation_for(ftos), | |
318 generate_continuation_for(dtos), | |
319 generate_continuation_for(vtos) | |
320 ); | |
321 } | |
322 | |
323 { CodeletMark cm(_masm, "safepoint entry points"); | |
324 Interpreter::_safept_entry = | |
325 EntryPoint( | |
326 generate_safept_entry_for(btos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
327 generate_safept_entry_for(ctos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
328 generate_safept_entry_for(stos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
329 generate_safept_entry_for(atos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
330 generate_safept_entry_for(itos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
331 generate_safept_entry_for(ltos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
332 generate_safept_entry_for(ftos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
333 generate_safept_entry_for(dtos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)), | |
334 generate_safept_entry_for(vtos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)) | |
335 ); | |
336 } | |
337 | |
338 { CodeletMark cm(_masm, "exception handling"); | |
339 // (Note: this is not safepoint safe because thread may return to compiled code) | |
340 generate_throw_exception(); | |
341 } | |
342 | |
343 { CodeletMark cm(_masm, "throw exception entrypoints"); | |
344 Interpreter::_throw_ArrayIndexOutOfBoundsException_entry = generate_ArrayIndexOutOfBounds_handler("java/lang/ArrayIndexOutOfBoundsException"); | |
345 Interpreter::_throw_ArrayStoreException_entry = generate_klass_exception_handler("java/lang/ArrayStoreException" ); | |
346 Interpreter::_throw_ArithmeticException_entry = generate_exception_handler("java/lang/ArithmeticException" , "/ by zero"); | |
347 Interpreter::_throw_ClassCastException_entry = generate_ClassCastException_handler(); | |
348 Interpreter::_throw_NullPointerException_entry = generate_exception_handler("java/lang/NullPointerException" , NULL ); | |
349 Interpreter::_throw_StackOverflowError_entry = generate_StackOverflowError_handler(); | |
350 } | |
351 | |
352 | |
353 | |
354 #define method_entry(kind) \ | |
355 { CodeletMark cm(_masm, "method entry point (kind = " #kind ")"); \ | |
356 Interpreter::_entry_table[Interpreter::kind] = generate_method_entry(Interpreter::kind); \ | |
357 } | |
358 | |
359 // all non-native method kinds | |
360 method_entry(zerolocals) | |
361 method_entry(zerolocals_synchronized) | |
362 method_entry(empty) | |
363 method_entry(accessor) | |
364 method_entry(abstract) | |
710 | 365 method_entry(method_handle) |
0 | 366 method_entry(java_lang_math_sin ) |
367 method_entry(java_lang_math_cos ) | |
368 method_entry(java_lang_math_tan ) | |
369 method_entry(java_lang_math_abs ) | |
370 method_entry(java_lang_math_sqrt ) | |
371 method_entry(java_lang_math_log ) | |
372 method_entry(java_lang_math_log10) | |
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373 method_entry(java_lang_ref_reference_get) |
0 | 374 |
375 // all native method kinds (must be one contiguous block) | |
376 Interpreter::_native_entry_begin = Interpreter::code()->code_end(); | |
377 method_entry(native) | |
378 method_entry(native_synchronized) | |
379 Interpreter::_native_entry_end = Interpreter::code()->code_end(); | |
380 | |
381 #undef method_entry | |
382 | |
383 // Bytecodes | |
384 set_entry_points_for_all_bytes(); | |
385 set_safepoints_for_all_bytes(); | |
386 } | |
387 | |
388 //------------------------------------------------------------------------------------------------------------------------ | |
389 | |
390 address TemplateInterpreterGenerator::generate_error_exit(const char* msg) { | |
391 address entry = __ pc(); | |
392 __ stop(msg); | |
393 return entry; | |
394 } | |
395 | |
396 | |
397 //------------------------------------------------------------------------------------------------------------------------ | |
398 | |
399 void TemplateInterpreterGenerator::set_entry_points_for_all_bytes() { | |
400 for (int i = 0; i < DispatchTable::length; i++) { | |
401 Bytecodes::Code code = (Bytecodes::Code)i; | |
402 if (Bytecodes::is_defined(code)) { | |
403 set_entry_points(code); | |
404 } else { | |
405 set_unimplemented(i); | |
406 } | |
407 } | |
408 } | |
409 | |
410 | |
411 void TemplateInterpreterGenerator::set_safepoints_for_all_bytes() { | |
412 for (int i = 0; i < DispatchTable::length; i++) { | |
413 Bytecodes::Code code = (Bytecodes::Code)i; | |
414 if (Bytecodes::is_defined(code)) Interpreter::_safept_table.set_entry(code, Interpreter::_safept_entry); | |
415 } | |
416 } | |
417 | |
418 | |
419 void TemplateInterpreterGenerator::set_unimplemented(int i) { | |
420 address e = _unimplemented_bytecode; | |
421 EntryPoint entry(e, e, e, e, e, e, e, e, e); | |
422 Interpreter::_normal_table.set_entry(i, entry); | |
423 Interpreter::_wentry_point[i] = _unimplemented_bytecode; | |
424 } | |
425 | |
426 | |
427 void TemplateInterpreterGenerator::set_entry_points(Bytecodes::Code code) { | |
428 CodeletMark cm(_masm, Bytecodes::name(code), code); | |
429 // initialize entry points | |
430 assert(_unimplemented_bytecode != NULL, "should have been generated before"); | |
431 assert(_illegal_bytecode_sequence != NULL, "should have been generated before"); | |
432 address bep = _illegal_bytecode_sequence; | |
433 address cep = _illegal_bytecode_sequence; | |
434 address sep = _illegal_bytecode_sequence; | |
435 address aep = _illegal_bytecode_sequence; | |
436 address iep = _illegal_bytecode_sequence; | |
437 address lep = _illegal_bytecode_sequence; | |
438 address fep = _illegal_bytecode_sequence; | |
439 address dep = _illegal_bytecode_sequence; | |
440 address vep = _unimplemented_bytecode; | |
441 address wep = _unimplemented_bytecode; | |
442 // code for short & wide version of bytecode | |
443 if (Bytecodes::is_defined(code)) { | |
444 Template* t = TemplateTable::template_for(code); | |
445 assert(t->is_valid(), "just checking"); | |
446 set_short_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep); | |
447 } | |
448 if (Bytecodes::wide_is_defined(code)) { | |
449 Template* t = TemplateTable::template_for_wide(code); | |
450 assert(t->is_valid(), "just checking"); | |
451 set_wide_entry_point(t, wep); | |
452 } | |
453 // set entry points | |
454 EntryPoint entry(bep, cep, sep, aep, iep, lep, fep, dep, vep); | |
455 Interpreter::_normal_table.set_entry(code, entry); | |
456 Interpreter::_wentry_point[code] = wep; | |
457 } | |
458 | |
459 | |
460 void TemplateInterpreterGenerator::set_wide_entry_point(Template* t, address& wep) { | |
461 assert(t->is_valid(), "template must exist"); | |
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462 assert(t->tos_in() == vtos, "only vtos tos_in supported for wide instructions"); |
0 | 463 wep = __ pc(); generate_and_dispatch(t); |
464 } | |
465 | |
466 | |
467 void TemplateInterpreterGenerator::set_short_entry_points(Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) { | |
468 assert(t->is_valid(), "template must exist"); | |
469 switch (t->tos_in()) { | |
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470 case btos: |
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471 case ctos: |
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472 case stos: |
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473 ShouldNotReachHere(); // btos/ctos/stos should use itos. |
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474 break; |
0 | 475 case atos: vep = __ pc(); __ pop(atos); aep = __ pc(); generate_and_dispatch(t); break; |
476 case itos: vep = __ pc(); __ pop(itos); iep = __ pc(); generate_and_dispatch(t); break; | |
477 case ltos: vep = __ pc(); __ pop(ltos); lep = __ pc(); generate_and_dispatch(t); break; | |
478 case ftos: vep = __ pc(); __ pop(ftos); fep = __ pc(); generate_and_dispatch(t); break; | |
479 case dtos: vep = __ pc(); __ pop(dtos); dep = __ pc(); generate_and_dispatch(t); break; | |
480 case vtos: set_vtos_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep); break; | |
481 default : ShouldNotReachHere(); break; | |
482 } | |
483 } | |
484 | |
485 | |
486 //------------------------------------------------------------------------------------------------------------------------ | |
487 | |
488 void TemplateInterpreterGenerator::generate_and_dispatch(Template* t, TosState tos_out) { | |
489 if (PrintBytecodeHistogram) histogram_bytecode(t); | |
490 #ifndef PRODUCT | |
491 // debugging code | |
492 if (CountBytecodes || TraceBytecodes || StopInterpreterAt > 0) count_bytecode(); | |
493 if (PrintBytecodePairHistogram) histogram_bytecode_pair(t); | |
494 if (TraceBytecodes) trace_bytecode(t); | |
495 if (StopInterpreterAt > 0) stop_interpreter_at(); | |
496 __ verify_FPU(1, t->tos_in()); | |
497 #endif // !PRODUCT | |
498 int step; | |
499 if (!t->does_dispatch()) { | |
500 step = t->is_wide() ? Bytecodes::wide_length_for(t->bytecode()) : Bytecodes::length_for(t->bytecode()); | |
501 if (tos_out == ilgl) tos_out = t->tos_out(); | |
502 // compute bytecode size | |
503 assert(step > 0, "just checkin'"); | |
504 // setup stuff for dispatching next bytecode | |
505 if (ProfileInterpreter && VerifyDataPointer | |
506 && methodDataOopDesc::bytecode_has_profile(t->bytecode())) { | |
507 __ verify_method_data_pointer(); | |
508 } | |
509 __ dispatch_prolog(tos_out, step); | |
510 } | |
511 // generate template | |
512 t->generate(_masm); | |
513 // advance | |
514 if (t->does_dispatch()) { | |
515 #ifdef ASSERT | |
516 // make sure execution doesn't go beyond this point if code is broken | |
517 __ should_not_reach_here(); | |
518 #endif // ASSERT | |
519 } else { | |
520 // dispatch to next bytecode | |
521 __ dispatch_epilog(tos_out, step); | |
522 } | |
523 } | |
524 | |
525 //------------------------------------------------------------------------------------------------------------------------ | |
526 // Entry points | |
527 | |
528 address TemplateInterpreter::return_entry(TosState state, int length) { | |
529 guarantee(0 <= length && length < Interpreter::number_of_return_entries, "illegal length"); | |
530 return _return_entry[length].entry(state); | |
531 } | |
532 | |
533 | |
534 address TemplateInterpreter::deopt_entry(TosState state, int length) { | |
535 guarantee(0 <= length && length < Interpreter::number_of_deopt_entries, "illegal length"); | |
536 return _deopt_entry[length].entry(state); | |
537 } | |
538 | |
539 //------------------------------------------------------------------------------------------------------------------------ | |
540 // Suport for invokes | |
541 | |
542 int TemplateInterpreter::TosState_as_index(TosState state) { | |
543 assert( state < number_of_states , "Invalid state in TosState_as_index"); | |
544 assert(0 <= (int)state && (int)state < TemplateInterpreter::number_of_return_addrs, "index out of bounds"); | |
545 return (int)state; | |
546 } | |
547 | |
548 | |
549 //------------------------------------------------------------------------------------------------------------------------ | |
550 // Safepoint suppport | |
551 | |
552 static inline void copy_table(address* from, address* to, int size) { | |
553 // Copy non-overlapping tables. The copy has to occur word wise for MT safety. | |
554 while (size-- > 0) *to++ = *from++; | |
555 } | |
556 | |
557 void TemplateInterpreter::notice_safepoints() { | |
558 if (!_notice_safepoints) { | |
559 // switch to safepoint dispatch table | |
560 _notice_safepoints = true; | |
561 copy_table((address*)&_safept_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address)); | |
562 } | |
563 } | |
564 | |
565 // switch from the dispatch table which notices safepoints back to the | |
566 // normal dispatch table. So that we can notice single stepping points, | |
567 // keep the safepoint dispatch table if we are single stepping in JVMTI. | |
568 // Note that the should_post_single_step test is exactly as fast as the | |
569 // JvmtiExport::_enabled test and covers both cases. | |
570 void TemplateInterpreter::ignore_safepoints() { | |
571 if (_notice_safepoints) { | |
572 if (!JvmtiExport::should_post_single_step()) { | |
573 // switch to normal dispatch table | |
574 _notice_safepoints = false; | |
575 copy_table((address*)&_normal_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address)); | |
576 } | |
577 } | |
578 } | |
579 | |
900
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580 //------------------------------------------------------------------------------------------------------------------------ |
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581 // Deoptimization support |
0 | 582 |
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583 // If deoptimization happens, this function returns the point of next bytecode to continue execution |
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584 address TemplateInterpreter::deopt_continue_after_entry(methodOop method, address bcp, int callee_parameters, bool is_top_frame) { |
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585 return AbstractInterpreter::deopt_continue_after_entry(method, bcp, callee_parameters, is_top_frame); |
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586 } |
0 | 587 |
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588 // If deoptimization happens, this function returns the point where the interpreter reexecutes |
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589 // the bytecode. |
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590 // Note: Bytecodes::_athrow (C1 only) and Bytecodes::_return are the special cases |
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591 // that do not return "Interpreter::deopt_entry(vtos, 0)" |
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592 address TemplateInterpreter::deopt_reexecute_entry(methodOop method, address bcp) { |
0 | 593 assert(method->contains(bcp), "just checkin'"); |
2142 | 594 Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); |
0 | 595 if (code == Bytecodes::_return) { |
900
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596 // This is used for deopt during registration of finalizers |
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597 // during Object.<init>. We simply need to resume execution at |
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598 // the standard return vtos bytecode to pop the frame normally. |
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599 // reexecuting the real bytecode would cause double registration |
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600 // of the finalizable object. |
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601 return _normal_table.entry(Bytecodes::_return).entry(vtos); |
0 | 602 } else { |
900
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603 return AbstractInterpreter::deopt_reexecute_entry(method, bcp); |
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604 } |
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605 } |
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606 |
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607 // If deoptimization happens, the interpreter should reexecute this bytecode. |
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608 // This function mainly helps the compilers to set up the reexecute bit. |
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609 bool TemplateInterpreter::bytecode_should_reexecute(Bytecodes::Code code) { |
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610 if (code == Bytecodes::_return) { |
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611 //Yes, we consider Bytecodes::_return as a special case of reexecution |
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612 return true; |
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613 } else { |
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614 return AbstractInterpreter::bytecode_should_reexecute(code); |
0 | 615 } |
616 } | |
617 | |
618 #endif // !CC_INTERP |