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src/share/vm/interpreter/templateInterpreter.cpp@6759698e3140
src/share/vm/interpreter/templateInterpreter.cpp
Tue, 15 May 2012 10:10:23 +0200
- author
- roland
- date
- Tue, 15 May 2012 10:10:23 +0200
- changeset 3787
- 6759698e3140
- parent 2978
- d83ac25d0304
- child 3969
- 1d7922586cf6
- permissions
- -rw-r--r--
7133857: exp() and pow() should use the x87 ISA on x86
Summary: use x87 instructions to implement exp() and pow() in interpreter/c1/c2.
Reviewed-by: kvn, never, twisti
1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "interpreter/interpreter.hpp"
27 #include "interpreter/interpreterGenerator.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "interpreter/templateTable.hpp"
31 #ifndef CC_INTERP
33 # define __ _masm->
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");
41 AbstractInterpreter::initialize();
43 TemplateTable::initialize();
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 }
56 // initialize dispatch table
57 _active_table = _normal_table;
58 }
60 //------------------------------------------------------------------------------------------------------------------------
61 // Implementation of EntryPoint
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 }
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 }
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 }
97 address EntryPoint::entry(TosState state) const {
98 assert(0 <= state && state < number_of_states, "state out of bounds");
99 return _entry[state];
100 }
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 }
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 }
122 //------------------------------------------------------------------------------------------------------------------------
123 // Implementation of DispatchTable
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 }
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 }
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 }
166 address TemplateInterpreter::_remove_activation_entry = NULL;
167 address TemplateInterpreter::_remove_activation_preserving_args_entry = NULL;
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;
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;
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];
190 DispatchTable TemplateInterpreter::_active_table;
191 DispatchTable TemplateInterpreter::_normal_table;
192 DispatchTable TemplateInterpreter::_safept_table;
193 address TemplateInterpreter::_wentry_point[DispatchTable::length];
195 TemplateInterpreterGenerator::TemplateInterpreterGenerator(StubQueue* _code): AbstractInterpreterGenerator(_code) {
196 _unimplemented_bytecode = NULL;
197 _illegal_bytecode_sequence = NULL;
198 }
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 };
213 void TemplateInterpreterGenerator::generate_all() {
214 AbstractInterpreterGenerator::generate_all();
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 }
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
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 }
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 }
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 }
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));
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 }
301 for (int j = 0; j < number_of_states; j++) {
302 const TosState states[] = {btos, ctos, stos, itos, ltos, ftos, dtos, atos, vtos};
303 int index = Interpreter::TosState_as_index(states[j]);
304 Interpreter::_return_3_addrs_by_index[index] = Interpreter::return_entry(states[j], 3);
305 Interpreter::_return_5_addrs_by_index[index] = Interpreter::return_entry(states[j], 5);
306 }
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 }
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 }
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 }
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 }
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 }
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)
365 method_entry(method_handle)
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)
373 method_entry(java_lang_math_exp )
374 method_entry(java_lang_math_pow )
375 method_entry(java_lang_ref_reference_get)
377 // all native method kinds (must be one contiguous block)
378 Interpreter::_native_entry_begin = Interpreter::code()->code_end();
379 method_entry(native)
380 method_entry(native_synchronized)
381 Interpreter::_native_entry_end = Interpreter::code()->code_end();
383 #undef method_entry
385 // Bytecodes
386 set_entry_points_for_all_bytes();
387 set_safepoints_for_all_bytes();
388 }
390 //------------------------------------------------------------------------------------------------------------------------
392 address TemplateInterpreterGenerator::generate_error_exit(const char* msg) {
393 address entry = __ pc();
394 __ stop(msg);
395 return entry;
396 }
399 //------------------------------------------------------------------------------------------------------------------------
401 void TemplateInterpreterGenerator::set_entry_points_for_all_bytes() {
402 for (int i = 0; i < DispatchTable::length; i++) {
403 Bytecodes::Code code = (Bytecodes::Code)i;
404 if (Bytecodes::is_defined(code)) {
405 set_entry_points(code);
406 } else {
407 set_unimplemented(i);
408 }
409 }
410 }
413 void TemplateInterpreterGenerator::set_safepoints_for_all_bytes() {
414 for (int i = 0; i < DispatchTable::length; i++) {
415 Bytecodes::Code code = (Bytecodes::Code)i;
416 if (Bytecodes::is_defined(code)) Interpreter::_safept_table.set_entry(code, Interpreter::_safept_entry);
417 }
418 }
421 void TemplateInterpreterGenerator::set_unimplemented(int i) {
422 address e = _unimplemented_bytecode;
423 EntryPoint entry(e, e, e, e, e, e, e, e, e);
424 Interpreter::_normal_table.set_entry(i, entry);
425 Interpreter::_wentry_point[i] = _unimplemented_bytecode;
426 }
429 void TemplateInterpreterGenerator::set_entry_points(Bytecodes::Code code) {
430 CodeletMark cm(_masm, Bytecodes::name(code), code);
431 // initialize entry points
432 assert(_unimplemented_bytecode != NULL, "should have been generated before");
433 assert(_illegal_bytecode_sequence != NULL, "should have been generated before");
434 address bep = _illegal_bytecode_sequence;
435 address cep = _illegal_bytecode_sequence;
436 address sep = _illegal_bytecode_sequence;
437 address aep = _illegal_bytecode_sequence;
438 address iep = _illegal_bytecode_sequence;
439 address lep = _illegal_bytecode_sequence;
440 address fep = _illegal_bytecode_sequence;
441 address dep = _illegal_bytecode_sequence;
442 address vep = _unimplemented_bytecode;
443 address wep = _unimplemented_bytecode;
444 // code for short & wide version of bytecode
445 if (Bytecodes::is_defined(code)) {
446 Template* t = TemplateTable::template_for(code);
447 assert(t->is_valid(), "just checking");
448 set_short_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep);
449 }
450 if (Bytecodes::wide_is_defined(code)) {
451 Template* t = TemplateTable::template_for_wide(code);
452 assert(t->is_valid(), "just checking");
453 set_wide_entry_point(t, wep);
454 }
455 // set entry points
456 EntryPoint entry(bep, cep, sep, aep, iep, lep, fep, dep, vep);
457 Interpreter::_normal_table.set_entry(code, entry);
458 Interpreter::_wentry_point[code] = wep;
459 }
462 void TemplateInterpreterGenerator::set_wide_entry_point(Template* t, address& wep) {
463 assert(t->is_valid(), "template must exist");
464 assert(t->tos_in() == vtos, "only vtos tos_in supported for wide instructions");
465 wep = __ pc(); generate_and_dispatch(t);
466 }
469 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) {
470 assert(t->is_valid(), "template must exist");
471 switch (t->tos_in()) {
472 case btos:
473 case ctos:
474 case stos:
475 ShouldNotReachHere(); // btos/ctos/stos should use itos.
476 break;
477 case atos: vep = __ pc(); __ pop(atos); aep = __ pc(); generate_and_dispatch(t); break;
478 case itos: vep = __ pc(); __ pop(itos); iep = __ pc(); generate_and_dispatch(t); break;
479 case ltos: vep = __ pc(); __ pop(ltos); lep = __ pc(); generate_and_dispatch(t); break;
480 case ftos: vep = __ pc(); __ pop(ftos); fep = __ pc(); generate_and_dispatch(t); break;
481 case dtos: vep = __ pc(); __ pop(dtos); dep = __ pc(); generate_and_dispatch(t); break;
482 case vtos: set_vtos_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep); break;
483 default : ShouldNotReachHere(); break;
484 }
485 }
488 //------------------------------------------------------------------------------------------------------------------------
490 void TemplateInterpreterGenerator::generate_and_dispatch(Template* t, TosState tos_out) {
491 if (PrintBytecodeHistogram) histogram_bytecode(t);
492 #ifndef PRODUCT
493 // debugging code
494 if (CountBytecodes || TraceBytecodes || StopInterpreterAt > 0) count_bytecode();
495 if (PrintBytecodePairHistogram) histogram_bytecode_pair(t);
496 if (TraceBytecodes) trace_bytecode(t);
497 if (StopInterpreterAt > 0) stop_interpreter_at();
498 __ verify_FPU(1, t->tos_in());
499 #endif // !PRODUCT
500 int step;
501 if (!t->does_dispatch()) {
502 step = t->is_wide() ? Bytecodes::wide_length_for(t->bytecode()) : Bytecodes::length_for(t->bytecode());
503 if (tos_out == ilgl) tos_out = t->tos_out();
504 // compute bytecode size
505 assert(step > 0, "just checkin'");
506 // setup stuff for dispatching next bytecode
507 if (ProfileInterpreter && VerifyDataPointer
508 && methodDataOopDesc::bytecode_has_profile(t->bytecode())) {
509 __ verify_method_data_pointer();
510 }
511 __ dispatch_prolog(tos_out, step);
512 }
513 // generate template
514 t->generate(_masm);
515 // advance
516 if (t->does_dispatch()) {
517 #ifdef ASSERT
518 // make sure execution doesn't go beyond this point if code is broken
519 __ should_not_reach_here();
520 #endif // ASSERT
521 } else {
522 // dispatch to next bytecode
523 __ dispatch_epilog(tos_out, step);
524 }
525 }
527 //------------------------------------------------------------------------------------------------------------------------
528 // Entry points
530 address TemplateInterpreter::return_entry(TosState state, int length) {
531 guarantee(0 <= length && length < Interpreter::number_of_return_entries, "illegal length");
532 return _return_entry[length].entry(state);
533 }
536 address TemplateInterpreter::deopt_entry(TosState state, int length) {
537 guarantee(0 <= length && length < Interpreter::number_of_deopt_entries, "illegal length");
538 return _deopt_entry[length].entry(state);
539 }
541 //------------------------------------------------------------------------------------------------------------------------
542 // Suport for invokes
544 int TemplateInterpreter::TosState_as_index(TosState state) {
545 assert( state < number_of_states , "Invalid state in TosState_as_index");
546 assert(0 <= (int)state && (int)state < TemplateInterpreter::number_of_return_addrs, "index out of bounds");
547 return (int)state;
548 }
551 //------------------------------------------------------------------------------------------------------------------------
552 // Safepoint suppport
554 static inline void copy_table(address* from, address* to, int size) {
555 // Copy non-overlapping tables. The copy has to occur word wise for MT safety.
556 while (size-- > 0) *to++ = *from++;
557 }
559 void TemplateInterpreter::notice_safepoints() {
560 if (!_notice_safepoints) {
561 // switch to safepoint dispatch table
562 _notice_safepoints = true;
563 copy_table((address*)&_safept_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address));
564 }
565 }
567 // switch from the dispatch table which notices safepoints back to the
568 // normal dispatch table. So that we can notice single stepping points,
569 // keep the safepoint dispatch table if we are single stepping in JVMTI.
570 // Note that the should_post_single_step test is exactly as fast as the
571 // JvmtiExport::_enabled test and covers both cases.
572 void TemplateInterpreter::ignore_safepoints() {
573 if (_notice_safepoints) {
574 if (!JvmtiExport::should_post_single_step()) {
575 // switch to normal dispatch table
576 _notice_safepoints = false;
577 copy_table((address*)&_normal_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address));
578 }
579 }
580 }
582 //------------------------------------------------------------------------------------------------------------------------
583 // Deoptimization support
585 // If deoptimization happens, this function returns the point of next bytecode to continue execution
586 address TemplateInterpreter::deopt_continue_after_entry(methodOop method, address bcp, int callee_parameters, bool is_top_frame) {
587 return AbstractInterpreter::deopt_continue_after_entry(method, bcp, callee_parameters, is_top_frame);
588 }
590 // If deoptimization happens, this function returns the point where the interpreter reexecutes
591 // the bytecode.
592 // Note: Bytecodes::_athrow (C1 only) and Bytecodes::_return are the special cases
593 // that do not return "Interpreter::deopt_entry(vtos, 0)"
594 address TemplateInterpreter::deopt_reexecute_entry(methodOop method, address bcp) {
595 assert(method->contains(bcp), "just checkin'");
596 Bytecodes::Code code = Bytecodes::java_code_at(method, bcp);
597 if (code == Bytecodes::_return) {
598 // This is used for deopt during registration of finalizers
599 // during Object.<init>. We simply need to resume execution at
600 // the standard return vtos bytecode to pop the frame normally.
601 // reexecuting the real bytecode would cause double registration
602 // of the finalizable object.
603 return _normal_table.entry(Bytecodes::_return).entry(vtos);
604 } else {
605 return AbstractInterpreter::deopt_reexecute_entry(method, bcp);
606 }
607 }
609 // If deoptimization happens, the interpreter should reexecute this bytecode.
610 // This function mainly helps the compilers to set up the reexecute bit.
611 bool TemplateInterpreter::bytecode_should_reexecute(Bytecodes::Code code) {
612 if (code == Bytecodes::_return) {
613 //Yes, we consider Bytecodes::_return as a special case of reexecution
614 return true;
615 } else {
616 return AbstractInterpreter::bytecode_should_reexecute(code);
617 }
618 }
620 #endif // !CC_INTERP
