Mercurial > hg > truffle
annotate src/share/vm/shark/sharkTopLevelBlock.cpp @ 17977:0b9500028980
8029381: assert(is_method_type()) failed: bad cast
Summary: Access to method_type and appendix from constant pool (cpcache) needs to be guarded by is_f1_null() because of racy update/initialization.
Reviewed-by: kvn, coleenp, jrose
author | drchase |
---|---|
date | Mon, 02 Jun 2014 14:32:29 -0400 |
parents | 55fb97c4c58d |
children | 4ca6dc0799b6 |
rev | line source |
---|---|
1692 | 1 /* |
17467
55fb97c4c58d
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
mikael
parents:
7601
diff
changeset
|
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
1692 | 3 * Copyright 2008, 2009, 2010 Red Hat, Inc. |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
1972 | 26 #include "precompiled.hpp" |
27 #include "ci/ciField.hpp" | |
28 #include "ci/ciInstance.hpp" | |
29 #include "ci/ciObjArrayKlass.hpp" | |
30 #include "ci/ciStreams.hpp" | |
31 #include "ci/ciType.hpp" | |
32 #include "ci/ciTypeFlow.hpp" | |
33 #include "interpreter/bytecodes.hpp" | |
34 #include "memory/allocation.hpp" | |
35 #include "runtime/deoptimization.hpp" | |
36 #include "shark/llvmHeaders.hpp" | |
37 #include "shark/llvmValue.hpp" | |
38 #include "shark/sharkBuilder.hpp" | |
39 #include "shark/sharkCacheDecache.hpp" | |
40 #include "shark/sharkConstant.hpp" | |
41 #include "shark/sharkInliner.hpp" | |
42 #include "shark/sharkState.hpp" | |
43 #include "shark/sharkTopLevelBlock.hpp" | |
44 #include "shark/sharkValue.hpp" | |
45 #include "shark/shark_globals.hpp" | |
46 #include "utilities/debug.hpp" | |
1692 | 47 |
48 using namespace llvm; | |
49 | |
50 void SharkTopLevelBlock::scan_for_traps() { | |
51 // If typeflow found a trap then don't scan past it | |
52 int limit_bci = ciblock()->has_trap() ? ciblock()->trap_bci() : limit(); | |
53 | |
54 // Scan the bytecode for traps that are always hit | |
55 iter()->reset_to_bci(start()); | |
56 while (iter()->next_bci() < limit_bci) { | |
57 iter()->next(); | |
58 | |
59 ciField *field; | |
60 ciMethod *method; | |
61 ciInstanceKlass *klass; | |
62 bool will_link; | |
63 bool is_field; | |
64 | |
65 switch (bc()) { | |
66 case Bytecodes::_ldc: | |
67 case Bytecodes::_ldc_w: | |
7195 | 68 case Bytecodes::_ldc2_w: |
1692 | 69 if (!SharkConstant::for_ldc(iter())->is_loaded()) { |
70 set_trap( | |
71 Deoptimization::make_trap_request( | |
72 Deoptimization::Reason_uninitialized, | |
73 Deoptimization::Action_reinterpret), bci()); | |
74 return; | |
75 } | |
76 break; | |
77 | |
78 case Bytecodes::_getfield: | |
79 case Bytecodes::_getstatic: | |
80 case Bytecodes::_putfield: | |
81 case Bytecodes::_putstatic: | |
82 field = iter()->get_field(will_link); | |
83 assert(will_link, "typeflow responsibility"); | |
84 is_field = (bc() == Bytecodes::_getfield || bc() == Bytecodes::_putfield); | |
85 | |
86 // If the bytecode does not match the field then bail out to | |
87 // the interpreter to throw an IncompatibleClassChangeError | |
88 if (is_field == field->is_static()) { | |
89 set_trap( | |
90 Deoptimization::make_trap_request( | |
91 Deoptimization::Reason_unhandled, | |
92 Deoptimization::Action_none), bci()); | |
93 return; | |
94 } | |
95 | |
96 // Bail out if we are trying to access a static variable | |
97 // before the class initializer has completed. | |
98 if (!is_field && !field->holder()->is_initialized()) { | |
99 if (!static_field_ok_in_clinit(field)) { | |
100 set_trap( | |
101 Deoptimization::make_trap_request( | |
102 Deoptimization::Reason_uninitialized, | |
103 Deoptimization::Action_reinterpret), bci()); | |
104 return; | |
105 } | |
106 } | |
107 break; | |
108 | |
109 case Bytecodes::_invokestatic: | |
110 case Bytecodes::_invokespecial: | |
111 case Bytecodes::_invokevirtual: | |
112 case Bytecodes::_invokeinterface: | |
7195 | 113 ciSignature* sig; |
114 method = iter()->get_method(will_link, &sig); | |
1692 | 115 assert(will_link, "typeflow responsibility"); |
7601 | 116 // We can't compile calls to method handle intrinsics, because we use |
117 // the interpreter entry points and they expect the top frame to be an | |
118 // interpreter frame. We need to implement the intrinsics for Shark. | |
119 if (method->is_method_handle_intrinsic() || method->is_compiled_lambda_form()) { | |
120 if (SharkPerformanceWarnings) { | |
121 warning("JSR292 optimization not yet implemented in Shark"); | |
122 } | |
123 set_trap( | |
124 Deoptimization::make_trap_request( | |
125 Deoptimization::Reason_unhandled, | |
126 Deoptimization::Action_make_not_compilable), bci()); | |
127 return; | |
128 } | |
1692 | 129 if (!method->holder()->is_linked()) { |
130 set_trap( | |
131 Deoptimization::make_trap_request( | |
132 Deoptimization::Reason_uninitialized, | |
133 Deoptimization::Action_reinterpret), bci()); | |
134 return; | |
135 } | |
136 | |
137 if (bc() == Bytecodes::_invokevirtual) { | |
138 klass = ciEnv::get_instance_klass_for_declared_method_holder( | |
139 iter()->get_declared_method_holder()); | |
140 if (!klass->is_linked()) { | |
141 set_trap( | |
142 Deoptimization::make_trap_request( | |
143 Deoptimization::Reason_uninitialized, | |
144 Deoptimization::Action_reinterpret), bci()); | |
145 return; | |
146 } | |
147 } | |
148 break; | |
149 | |
150 case Bytecodes::_new: | |
151 klass = iter()->get_klass(will_link)->as_instance_klass(); | |
152 assert(will_link, "typeflow responsibility"); | |
153 | |
154 // Bail out if the class is unloaded | |
155 if (iter()->is_unresolved_klass() || !klass->is_initialized()) { | |
156 set_trap( | |
157 Deoptimization::make_trap_request( | |
158 Deoptimization::Reason_uninitialized, | |
159 Deoptimization::Action_reinterpret), bci()); | |
160 return; | |
161 } | |
162 | |
163 // Bail out if the class cannot be instantiated | |
164 if (klass->is_abstract() || klass->is_interface() || | |
165 klass->name() == ciSymbol::java_lang_Class()) { | |
166 set_trap( | |
167 Deoptimization::make_trap_request( | |
168 Deoptimization::Reason_unhandled, | |
169 Deoptimization::Action_reinterpret), bci()); | |
170 return; | |
171 } | |
172 break; | |
7601 | 173 case Bytecodes::_invokedynamic: |
174 case Bytecodes::_invokehandle: | |
175 if (SharkPerformanceWarnings) { | |
176 warning("JSR292 optimization not yet implemented in Shark"); | |
177 } | |
178 set_trap( | |
179 Deoptimization::make_trap_request( | |
180 Deoptimization::Reason_unhandled, | |
181 Deoptimization::Action_make_not_compilable), bci()); | |
182 return; | |
1692 | 183 } |
184 } | |
185 | |
186 // Trap if typeflow trapped (and we didn't before) | |
187 if (ciblock()->has_trap()) { | |
188 set_trap( | |
189 Deoptimization::make_trap_request( | |
190 Deoptimization::Reason_unloaded, | |
191 Deoptimization::Action_reinterpret, | |
192 ciblock()->trap_index()), ciblock()->trap_bci()); | |
193 return; | |
194 } | |
195 } | |
196 | |
197 bool SharkTopLevelBlock::static_field_ok_in_clinit(ciField* field) { | |
198 assert(field->is_static(), "should be"); | |
199 | |
200 // This code is lifted pretty much verbatim from C2's | |
201 // Parse::static_field_ok_in_clinit() in parse3.cpp. | |
202 bool access_OK = false; | |
203 if (target()->holder()->is_subclass_of(field->holder())) { | |
204 if (target()->is_static()) { | |
205 if (target()->name() == ciSymbol::class_initializer_name()) { | |
206 // It's OK to access static fields from the class initializer | |
207 access_OK = true; | |
208 } | |
209 } | |
210 else { | |
211 if (target()->name() == ciSymbol::object_initializer_name()) { | |
212 // It's also OK to access static fields inside a constructor, | |
213 // because any thread calling the constructor must first have | |
214 // synchronized on the class by executing a "new" bytecode. | |
215 access_OK = true; | |
216 } | |
217 } | |
218 } | |
219 return access_OK; | |
220 } | |
221 | |
222 SharkState* SharkTopLevelBlock::entry_state() { | |
223 if (_entry_state == NULL) { | |
224 assert(needs_phis(), "should do"); | |
225 _entry_state = new SharkPHIState(this); | |
226 } | |
227 return _entry_state; | |
228 } | |
229 | |
230 void SharkTopLevelBlock::add_incoming(SharkState* incoming_state) { | |
231 if (needs_phis()) { | |
232 ((SharkPHIState *) entry_state())->add_incoming(incoming_state); | |
233 } | |
234 else if (_entry_state == NULL) { | |
235 _entry_state = incoming_state; | |
236 } | |
237 else { | |
238 assert(entry_state()->equal_to(incoming_state), "should be"); | |
239 } | |
240 } | |
241 | |
242 void SharkTopLevelBlock::enter(SharkTopLevelBlock* predecessor, | |
243 bool is_exception) { | |
244 // This block requires phis: | |
245 // - if it is entered more than once | |
246 // - if it is an exception handler, because in which | |
247 // case we assume it's entered more than once. | |
248 // - if the predecessor will be compiled after this | |
249 // block, in which case we can't simple propagate | |
250 // the state forward. | |
251 if (!needs_phis() && | |
252 (entered() || | |
253 is_exception || | |
254 (predecessor && predecessor->index() >= index()))) | |
255 _needs_phis = true; | |
256 | |
257 // Recurse into the tree | |
258 if (!entered()) { | |
259 _entered = true; | |
260 | |
261 scan_for_traps(); | |
262 if (!has_trap()) { | |
263 for (int i = 0; i < num_successors(); i++) { | |
264 successor(i)->enter(this, false); | |
265 } | |
266 } | |
267 compute_exceptions(); | |
268 for (int i = 0; i < num_exceptions(); i++) { | |
269 SharkTopLevelBlock *handler = exception(i); | |
270 if (handler) | |
271 handler->enter(this, true); | |
272 } | |
273 } | |
274 } | |
275 | |
276 void SharkTopLevelBlock::initialize() { | |
277 char name[28]; | |
278 snprintf(name, sizeof(name), | |
279 "bci_%d%s", | |
280 start(), is_backedge_copy() ? "_backedge_copy" : ""); | |
281 _entry_block = function()->CreateBlock(name); | |
282 } | |
283 | |
284 void SharkTopLevelBlock::decache_for_Java_call(ciMethod *callee) { | |
285 SharkJavaCallDecacher(function(), bci(), callee).scan(current_state()); | |
286 for (int i = 0; i < callee->arg_size(); i++) | |
287 xpop(); | |
288 } | |
289 | |
290 void SharkTopLevelBlock::cache_after_Java_call(ciMethod *callee) { | |
291 if (callee->return_type()->size()) { | |
292 ciType *type; | |
293 switch (callee->return_type()->basic_type()) { | |
294 case T_BOOLEAN: | |
295 case T_BYTE: | |
296 case T_CHAR: | |
297 case T_SHORT: | |
298 type = ciType::make(T_INT); | |
299 break; | |
300 | |
301 default: | |
302 type = callee->return_type(); | |
303 } | |
304 | |
305 push(SharkValue::create_generic(type, NULL, false)); | |
306 } | |
307 SharkJavaCallCacher(function(), callee).scan(current_state()); | |
308 } | |
309 | |
310 void SharkTopLevelBlock::decache_for_VM_call() { | |
311 SharkVMCallDecacher(function(), bci()).scan(current_state()); | |
312 } | |
313 | |
314 void SharkTopLevelBlock::cache_after_VM_call() { | |
315 SharkVMCallCacher(function()).scan(current_state()); | |
316 } | |
317 | |
318 void SharkTopLevelBlock::decache_for_trap() { | |
319 SharkTrapDecacher(function(), bci()).scan(current_state()); | |
320 } | |
321 | |
322 void SharkTopLevelBlock::emit_IR() { | |
323 builder()->SetInsertPoint(entry_block()); | |
324 | |
325 // Parse the bytecode | |
326 parse_bytecode(start(), limit()); | |
327 | |
328 // If this block falls through to the next then it won't have been | |
329 // terminated by a bytecode and we have to add the branch ourselves | |
330 if (falls_through() && !has_trap()) | |
331 do_branch(ciTypeFlow::FALL_THROUGH); | |
332 } | |
333 | |
334 SharkTopLevelBlock* SharkTopLevelBlock::bci_successor(int bci) const { | |
335 // XXX now with Linear Search Technology (tm) | |
336 for (int i = 0; i < num_successors(); i++) { | |
337 ciTypeFlow::Block *successor = ciblock()->successors()->at(i); | |
338 if (successor->start() == bci) | |
339 return function()->block(successor->pre_order()); | |
340 } | |
341 ShouldNotReachHere(); | |
342 } | |
343 | |
344 void SharkTopLevelBlock::do_zero_check(SharkValue *value) { | |
345 if (value->is_phi() && value->as_phi()->all_incomers_zero_checked()) { | |
346 function()->add_deferred_zero_check(this, value); | |
347 } | |
348 else { | |
349 BasicBlock *continue_block = function()->CreateBlock("not_zero"); | |
350 SharkState *saved_state = current_state(); | |
351 set_current_state(saved_state->copy()); | |
352 zero_check_value(value, continue_block); | |
353 builder()->SetInsertPoint(continue_block); | |
354 set_current_state(saved_state); | |
355 } | |
356 | |
357 value->set_zero_checked(true); | |
358 } | |
359 | |
360 void SharkTopLevelBlock::do_deferred_zero_check(SharkValue* value, | |
361 int bci, | |
362 SharkState* saved_state, | |
363 BasicBlock* continue_block) { | |
364 if (value->as_phi()->all_incomers_zero_checked()) { | |
365 builder()->CreateBr(continue_block); | |
366 } | |
367 else { | |
368 iter()->force_bci(start()); | |
369 set_current_state(saved_state); | |
370 zero_check_value(value, continue_block); | |
371 } | |
372 } | |
373 | |
374 void SharkTopLevelBlock::zero_check_value(SharkValue* value, | |
375 BasicBlock* continue_block) { | |
376 BasicBlock *zero_block = builder()->CreateBlock(continue_block, "zero"); | |
377 | |
378 Value *a, *b; | |
379 switch (value->basic_type()) { | |
380 case T_BYTE: | |
381 case T_CHAR: | |
382 case T_SHORT: | |
383 case T_INT: | |
384 a = value->jint_value(); | |
385 b = LLVMValue::jint_constant(0); | |
386 break; | |
387 case T_LONG: | |
388 a = value->jlong_value(); | |
389 b = LLVMValue::jlong_constant(0); | |
390 break; | |
391 case T_OBJECT: | |
392 case T_ARRAY: | |
393 a = value->jobject_value(); | |
394 b = LLVMValue::LLVMValue::null(); | |
395 break; | |
396 default: | |
397 tty->print_cr("Unhandled type %s", type2name(value->basic_type())); | |
398 ShouldNotReachHere(); | |
399 } | |
400 | |
401 builder()->CreateCondBr( | |
402 builder()->CreateICmpNE(a, b), continue_block, zero_block); | |
403 | |
404 builder()->SetInsertPoint(zero_block); | |
405 if (value->is_jobject()) { | |
406 call_vm( | |
407 builder()->throw_NullPointerException(), | |
408 builder()->CreateIntToPtr( | |
409 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
410 PointerType::getUnqual(SharkType::jbyte_type())), | |
411 LLVMValue::jint_constant(__LINE__), | |
412 EX_CHECK_NONE); | |
413 } | |
414 else { | |
415 call_vm( | |
416 builder()->throw_ArithmeticException(), | |
417 builder()->CreateIntToPtr( | |
418 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
419 PointerType::getUnqual(SharkType::jbyte_type())), | |
420 LLVMValue::jint_constant(__LINE__), | |
421 EX_CHECK_NONE); | |
422 } | |
423 | |
424 Value *pending_exception = get_pending_exception(); | |
425 clear_pending_exception(); | |
426 handle_exception(pending_exception, EX_CHECK_FULL); | |
427 } | |
428 | |
429 void SharkTopLevelBlock::check_bounds(SharkValue* array, SharkValue* index) { | |
430 BasicBlock *out_of_bounds = function()->CreateBlock("out_of_bounds"); | |
431 BasicBlock *in_bounds = function()->CreateBlock("in_bounds"); | |
432 | |
433 Value *length = builder()->CreateArrayLength(array->jarray_value()); | |
434 // we use an unsigned comparison to catch negative values | |
435 builder()->CreateCondBr( | |
436 builder()->CreateICmpULT(index->jint_value(), length), | |
437 in_bounds, out_of_bounds); | |
438 | |
439 builder()->SetInsertPoint(out_of_bounds); | |
440 SharkState *saved_state = current_state()->copy(); | |
441 | |
442 call_vm( | |
443 builder()->throw_ArrayIndexOutOfBoundsException(), | |
444 builder()->CreateIntToPtr( | |
445 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
446 PointerType::getUnqual(SharkType::jbyte_type())), | |
447 LLVMValue::jint_constant(__LINE__), | |
448 index->jint_value(), | |
449 EX_CHECK_NONE); | |
450 | |
451 Value *pending_exception = get_pending_exception(); | |
452 clear_pending_exception(); | |
453 handle_exception(pending_exception, EX_CHECK_FULL); | |
454 | |
455 set_current_state(saved_state); | |
456 | |
457 builder()->SetInsertPoint(in_bounds); | |
458 } | |
459 | |
460 void SharkTopLevelBlock::check_pending_exception(int action) { | |
461 assert(action & EAM_CHECK, "should be"); | |
462 | |
463 BasicBlock *exception = function()->CreateBlock("exception"); | |
464 BasicBlock *no_exception = function()->CreateBlock("no_exception"); | |
465 | |
466 Value *pending_exception = get_pending_exception(); | |
467 builder()->CreateCondBr( | |
468 builder()->CreateICmpEQ(pending_exception, LLVMValue::null()), | |
469 no_exception, exception); | |
470 | |
471 builder()->SetInsertPoint(exception); | |
472 SharkState *saved_state = current_state()->copy(); | |
473 if (action & EAM_MONITOR_FUDGE) { | |
474 // The top monitor is marked live, but the exception was thrown | |
475 // while setting it up so we need to mark it dead before we enter | |
476 // any exception handlers as they will not expect it to be there. | |
477 set_num_monitors(num_monitors() - 1); | |
478 action ^= EAM_MONITOR_FUDGE; | |
479 } | |
480 clear_pending_exception(); | |
481 handle_exception(pending_exception, action); | |
482 set_current_state(saved_state); | |
483 | |
484 builder()->SetInsertPoint(no_exception); | |
485 } | |
486 | |
487 void SharkTopLevelBlock::compute_exceptions() { | |
488 ciExceptionHandlerStream str(target(), start()); | |
489 | |
490 int exc_count = str.count(); | |
491 _exc_handlers = new GrowableArray<ciExceptionHandler*>(exc_count); | |
492 _exceptions = new GrowableArray<SharkTopLevelBlock*>(exc_count); | |
493 | |
494 int index = 0; | |
495 for (; !str.is_done(); str.next()) { | |
496 ciExceptionHandler *handler = str.handler(); | |
497 if (handler->handler_bci() == -1) | |
498 break; | |
499 _exc_handlers->append(handler); | |
500 | |
501 // Try and get this exception's handler from typeflow. We should | |
502 // do it this way always, really, except that typeflow sometimes | |
503 // doesn't record exceptions, even loaded ones, and sometimes it | |
504 // returns them with a different handler bci. Why??? | |
505 SharkTopLevelBlock *block = NULL; | |
506 ciInstanceKlass* klass; | |
507 if (handler->is_catch_all()) { | |
508 klass = java_lang_Throwable_klass(); | |
509 } | |
510 else { | |
511 klass = handler->catch_klass(); | |
512 } | |
513 for (int i = 0; i < ciblock()->exceptions()->length(); i++) { | |
514 if (klass == ciblock()->exc_klasses()->at(i)) { | |
515 block = function()->block(ciblock()->exceptions()->at(i)->pre_order()); | |
516 if (block->start() == handler->handler_bci()) | |
517 break; | |
518 else | |
519 block = NULL; | |
520 } | |
521 } | |
522 | |
523 // If typeflow let us down then try and figure it out ourselves | |
524 if (block == NULL) { | |
525 for (int i = 0; i < function()->block_count(); i++) { | |
526 SharkTopLevelBlock *candidate = function()->block(i); | |
527 if (candidate->start() == handler->handler_bci()) { | |
528 if (block != NULL) { | |
529 NOT_PRODUCT(warning("there may be trouble ahead")); | |
530 block = NULL; | |
531 break; | |
532 } | |
533 block = candidate; | |
534 } | |
535 } | |
536 } | |
537 _exceptions->append(block); | |
538 } | |
539 } | |
540 | |
541 void SharkTopLevelBlock::handle_exception(Value* exception, int action) { | |
542 if (action & EAM_HANDLE && num_exceptions() != 0) { | |
543 // Clear the stack and push the exception onto it | |
544 while (xstack_depth()) | |
545 pop(); | |
546 push(SharkValue::create_jobject(exception, true)); | |
547 | |
548 // Work out how many options we have to check | |
549 bool has_catch_all = exc_handler(num_exceptions() - 1)->is_catch_all(); | |
550 int num_options = num_exceptions(); | |
551 if (has_catch_all) | |
552 num_options--; | |
553 | |
554 // Marshal any non-catch-all handlers | |
555 if (num_options > 0) { | |
556 bool all_loaded = true; | |
557 for (int i = 0; i < num_options; i++) { | |
558 if (!exc_handler(i)->catch_klass()->is_loaded()) { | |
559 all_loaded = false; | |
560 break; | |
561 } | |
562 } | |
563 | |
564 if (all_loaded) | |
565 marshal_exception_fast(num_options); | |
566 else | |
567 marshal_exception_slow(num_options); | |
568 } | |
569 | |
570 // Install the catch-all handler, if present | |
571 if (has_catch_all) { | |
572 SharkTopLevelBlock* handler = this->exception(num_options); | |
573 assert(handler != NULL, "catch-all handler cannot be unloaded"); | |
574 | |
575 builder()->CreateBr(handler->entry_block()); | |
576 handler->add_incoming(current_state()); | |
577 return; | |
578 } | |
579 } | |
580 | |
581 // No exception handler was found; unwind and return | |
582 handle_return(T_VOID, exception); | |
583 } | |
584 | |
585 void SharkTopLevelBlock::marshal_exception_fast(int num_options) { | |
586 Value *exception_klass = builder()->CreateValueOfStructEntry( | |
587 xstack(0)->jobject_value(), | |
588 in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
7195 | 589 SharkType::klass_type(), |
1692 | 590 "exception_klass"); |
591 | |
592 for (int i = 0; i < num_options; i++) { | |
593 Value *check_klass = | |
7195 | 594 builder()->CreateInlineMetadata(exc_handler(i)->catch_klass(), SharkType::klass_type()); |
1692 | 595 |
596 BasicBlock *not_exact = function()->CreateBlock("not_exact"); | |
597 BasicBlock *not_subtype = function()->CreateBlock("not_subtype"); | |
598 | |
599 builder()->CreateCondBr( | |
600 builder()->CreateICmpEQ(check_klass, exception_klass), | |
601 handler_for_exception(i), not_exact); | |
602 | |
603 builder()->SetInsertPoint(not_exact); | |
604 builder()->CreateCondBr( | |
605 builder()->CreateICmpNE( | |
606 builder()->CreateCall2( | |
607 builder()->is_subtype_of(), check_klass, exception_klass), | |
608 LLVMValue::jbyte_constant(0)), | |
609 handler_for_exception(i), not_subtype); | |
610 | |
611 builder()->SetInsertPoint(not_subtype); | |
612 } | |
613 } | |
614 | |
615 void SharkTopLevelBlock::marshal_exception_slow(int num_options) { | |
616 int *indexes = NEW_RESOURCE_ARRAY(int, num_options); | |
617 for (int i = 0; i < num_options; i++) | |
618 indexes[i] = exc_handler(i)->catch_klass_index(); | |
619 | |
620 Value *index = call_vm( | |
621 builder()->find_exception_handler(), | |
622 builder()->CreateInlineData( | |
623 indexes, | |
624 num_options * sizeof(int), | |
625 PointerType::getUnqual(SharkType::jint_type())), | |
626 LLVMValue::jint_constant(num_options), | |
627 EX_CHECK_NO_CATCH); | |
628 | |
629 BasicBlock *no_handler = function()->CreateBlock("no_handler"); | |
630 SwitchInst *switchinst = builder()->CreateSwitch( | |
631 index, no_handler, num_options); | |
632 | |
633 for (int i = 0; i < num_options; i++) { | |
634 switchinst->addCase( | |
635 LLVMValue::jint_constant(i), | |
636 handler_for_exception(i)); | |
637 } | |
638 | |
639 builder()->SetInsertPoint(no_handler); | |
640 } | |
641 | |
642 BasicBlock* SharkTopLevelBlock::handler_for_exception(int index) { | |
643 SharkTopLevelBlock *successor = this->exception(index); | |
644 if (successor) { | |
645 successor->add_incoming(current_state()); | |
646 return successor->entry_block(); | |
647 } | |
648 else { | |
649 return make_trap( | |
650 exc_handler(index)->handler_bci(), | |
651 Deoptimization::make_trap_request( | |
652 Deoptimization::Reason_unhandled, | |
653 Deoptimization::Action_reinterpret)); | |
654 } | |
655 } | |
656 | |
657 void SharkTopLevelBlock::maybe_add_safepoint() { | |
658 if (current_state()->has_safepointed()) | |
659 return; | |
660 | |
661 BasicBlock *orig_block = builder()->GetInsertBlock(); | |
662 SharkState *orig_state = current_state()->copy(); | |
663 | |
664 BasicBlock *do_safepoint = function()->CreateBlock("do_safepoint"); | |
665 BasicBlock *safepointed = function()->CreateBlock("safepointed"); | |
666 | |
667 Value *state = builder()->CreateLoad( | |
668 builder()->CreateIntToPtr( | |
669 LLVMValue::intptr_constant( | |
670 (intptr_t) SafepointSynchronize::address_of_state()), | |
671 PointerType::getUnqual(SharkType::jint_type())), | |
672 "state"); | |
673 | |
674 builder()->CreateCondBr( | |
675 builder()->CreateICmpEQ( | |
676 state, | |
677 LLVMValue::jint_constant(SafepointSynchronize::_synchronizing)), | |
678 do_safepoint, safepointed); | |
679 | |
680 builder()->SetInsertPoint(do_safepoint); | |
681 call_vm(builder()->safepoint(), EX_CHECK_FULL); | |
682 BasicBlock *safepointed_block = builder()->GetInsertBlock(); | |
683 builder()->CreateBr(safepointed); | |
684 | |
685 builder()->SetInsertPoint(safepointed); | |
686 current_state()->merge(orig_state, orig_block, safepointed_block); | |
687 | |
688 current_state()->set_has_safepointed(true); | |
689 } | |
690 | |
691 void SharkTopLevelBlock::maybe_add_backedge_safepoint() { | |
692 if (current_state()->has_safepointed()) | |
693 return; | |
694 | |
695 for (int i = 0; i < num_successors(); i++) { | |
696 if (successor(i)->can_reach(this)) { | |
697 maybe_add_safepoint(); | |
698 break; | |
699 } | |
700 } | |
701 } | |
702 | |
703 bool SharkTopLevelBlock::can_reach(SharkTopLevelBlock* other) { | |
704 for (int i = 0; i < function()->block_count(); i++) | |
705 function()->block(i)->_can_reach_visited = false; | |
706 | |
707 return can_reach_helper(other); | |
708 } | |
709 | |
710 bool SharkTopLevelBlock::can_reach_helper(SharkTopLevelBlock* other) { | |
711 if (this == other) | |
712 return true; | |
713 | |
714 if (_can_reach_visited) | |
715 return false; | |
716 _can_reach_visited = true; | |
717 | |
718 if (!has_trap()) { | |
719 for (int i = 0; i < num_successors(); i++) { | |
720 if (successor(i)->can_reach_helper(other)) | |
721 return true; | |
722 } | |
723 } | |
724 | |
725 for (int i = 0; i < num_exceptions(); i++) { | |
726 SharkTopLevelBlock *handler = exception(i); | |
727 if (handler && handler->can_reach_helper(other)) | |
728 return true; | |
729 } | |
730 | |
731 return false; | |
732 } | |
733 | |
734 BasicBlock* SharkTopLevelBlock::make_trap(int trap_bci, int trap_request) { | |
735 BasicBlock *trap_block = function()->CreateBlock("trap"); | |
736 BasicBlock *orig_block = builder()->GetInsertBlock(); | |
737 builder()->SetInsertPoint(trap_block); | |
738 | |
739 int orig_bci = bci(); | |
740 iter()->force_bci(trap_bci); | |
741 | |
742 do_trap(trap_request); | |
743 | |
744 builder()->SetInsertPoint(orig_block); | |
745 iter()->force_bci(orig_bci); | |
746 | |
747 return trap_block; | |
748 } | |
749 | |
750 void SharkTopLevelBlock::do_trap(int trap_request) { | |
751 decache_for_trap(); | |
752 builder()->CreateRet( | |
753 builder()->CreateCall2( | |
754 builder()->uncommon_trap(), | |
755 thread(), | |
756 LLVMValue::jint_constant(trap_request))); | |
757 } | |
758 | |
759 void SharkTopLevelBlock::call_register_finalizer(Value *receiver) { | |
760 BasicBlock *orig_block = builder()->GetInsertBlock(); | |
761 SharkState *orig_state = current_state()->copy(); | |
762 | |
763 BasicBlock *do_call = function()->CreateBlock("has_finalizer"); | |
764 BasicBlock *done = function()->CreateBlock("done"); | |
765 | |
766 Value *klass = builder()->CreateValueOfStructEntry( | |
767 receiver, | |
768 in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
769 SharkType::oop_type(), | |
770 "klass"); | |
771 | |
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772 Value *access_flags = builder()->CreateValueOfStructEntry( |
1692 | 773 klass, |
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774 Klass::access_flags_offset(), |
1692 | 775 SharkType::jint_type(), |
776 "access_flags"); | |
777 | |
778 builder()->CreateCondBr( | |
779 builder()->CreateICmpNE( | |
780 builder()->CreateAnd( | |
781 access_flags, | |
782 LLVMValue::jint_constant(JVM_ACC_HAS_FINALIZER)), | |
783 LLVMValue::jint_constant(0)), | |
784 do_call, done); | |
785 | |
786 builder()->SetInsertPoint(do_call); | |
787 call_vm(builder()->register_finalizer(), receiver, EX_CHECK_FULL); | |
788 BasicBlock *branch_block = builder()->GetInsertBlock(); | |
789 builder()->CreateBr(done); | |
790 | |
791 builder()->SetInsertPoint(done); | |
792 current_state()->merge(orig_state, orig_block, branch_block); | |
793 } | |
794 | |
795 void SharkTopLevelBlock::handle_return(BasicType type, Value* exception) { | |
796 assert (exception == NULL || type == T_VOID, "exception OR result, please"); | |
797 | |
798 if (num_monitors()) { | |
799 // Protect our exception across possible monitor release decaches | |
800 if (exception) | |
801 set_oop_tmp(exception); | |
802 | |
803 // We don't need to check for exceptions thrown here. If | |
804 // we're returning a value then we just carry on as normal: | |
805 // the caller will see the pending exception and handle it. | |
806 // If we're returning with an exception then that exception | |
807 // takes priority and the release_lock one will be ignored. | |
808 while (num_monitors()) | |
809 release_lock(EX_CHECK_NONE); | |
810 | |
811 // Reload the exception we're throwing | |
812 if (exception) | |
813 exception = get_oop_tmp(); | |
814 } | |
815 | |
816 if (exception) { | |
817 builder()->CreateStore(exception, pending_exception_address()); | |
818 } | |
819 | |
820 Value *result_addr = stack()->CreatePopFrame(type2size[type]); | |
821 if (type != T_VOID) { | |
822 builder()->CreateStore( | |
823 pop_result(type)->generic_value(), | |
824 builder()->CreateIntToPtr( | |
825 result_addr, | |
826 PointerType::getUnqual(SharkType::to_stackType(type)))); | |
827 } | |
828 | |
829 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
830 } | |
831 | |
832 void SharkTopLevelBlock::do_arraylength() { | |
833 SharkValue *array = pop(); | |
834 check_null(array); | |
835 Value *length = builder()->CreateArrayLength(array->jarray_value()); | |
836 push(SharkValue::create_jint(length, false)); | |
837 } | |
838 | |
839 void SharkTopLevelBlock::do_aload(BasicType basic_type) { | |
840 SharkValue *index = pop(); | |
841 SharkValue *array = pop(); | |
842 | |
843 check_null(array); | |
844 check_bounds(array, index); | |
845 | |
846 Value *value = builder()->CreateLoad( | |
847 builder()->CreateArrayAddress( | |
848 array->jarray_value(), basic_type, index->jint_value())); | |
849 | |
7195 | 850 Type *stack_type = SharkType::to_stackType(basic_type); |
1692 | 851 if (value->getType() != stack_type) |
852 value = builder()->CreateIntCast(value, stack_type, basic_type != T_CHAR); | |
853 | |
854 switch (basic_type) { | |
855 case T_BYTE: | |
856 case T_CHAR: | |
857 case T_SHORT: | |
858 case T_INT: | |
859 push(SharkValue::create_jint(value, false)); | |
860 break; | |
861 | |
862 case T_LONG: | |
863 push(SharkValue::create_jlong(value, false)); | |
864 break; | |
865 | |
866 case T_FLOAT: | |
867 push(SharkValue::create_jfloat(value)); | |
868 break; | |
869 | |
870 case T_DOUBLE: | |
871 push(SharkValue::create_jdouble(value)); | |
872 break; | |
873 | |
874 case T_OBJECT: | |
875 // You might expect that array->type()->is_array_klass() would | |
876 // always be true, but it isn't. If ciTypeFlow detects that a | |
877 // value is always null then that value becomes an untyped null | |
878 // object. Shark doesn't presently support this, so a generic | |
879 // T_OBJECT is created. In this case we guess the type using | |
880 // the BasicType we were supplied. In reality the generated | |
881 // code will never be used, as the null value will be caught | |
882 // by the above null pointer check. | |
883 // http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=324 | |
884 push( | |
885 SharkValue::create_generic( | |
886 array->type()->is_array_klass() ? | |
887 ((ciArrayKlass *) array->type())->element_type() : | |
888 ciType::make(basic_type), | |
889 value, false)); | |
890 break; | |
891 | |
892 default: | |
893 tty->print_cr("Unhandled type %s", type2name(basic_type)); | |
894 ShouldNotReachHere(); | |
895 } | |
896 } | |
897 | |
898 void SharkTopLevelBlock::do_astore(BasicType basic_type) { | |
899 SharkValue *svalue = pop(); | |
900 SharkValue *index = pop(); | |
901 SharkValue *array = pop(); | |
902 | |
903 check_null(array); | |
904 check_bounds(array, index); | |
905 | |
906 Value *value; | |
907 switch (basic_type) { | |
908 case T_BYTE: | |
909 case T_CHAR: | |
910 case T_SHORT: | |
911 case T_INT: | |
912 value = svalue->jint_value(); | |
913 break; | |
914 | |
915 case T_LONG: | |
916 value = svalue->jlong_value(); | |
917 break; | |
918 | |
919 case T_FLOAT: | |
920 value = svalue->jfloat_value(); | |
921 break; | |
922 | |
923 case T_DOUBLE: | |
924 value = svalue->jdouble_value(); | |
925 break; | |
926 | |
927 case T_OBJECT: | |
928 value = svalue->jobject_value(); | |
929 // XXX assignability check | |
930 break; | |
931 | |
932 default: | |
933 tty->print_cr("Unhandled type %s", type2name(basic_type)); | |
934 ShouldNotReachHere(); | |
935 } | |
936 | |
7195 | 937 Type *array_type = SharkType::to_arrayType(basic_type); |
1692 | 938 if (value->getType() != array_type) |
939 value = builder()->CreateIntCast(value, array_type, basic_type != T_CHAR); | |
940 | |
941 Value *addr = builder()->CreateArrayAddress( | |
942 array->jarray_value(), basic_type, index->jint_value(), "addr"); | |
943 | |
944 builder()->CreateStore(value, addr); | |
945 | |
946 if (basic_type == T_OBJECT) // XXX or T_ARRAY? | |
947 builder()->CreateUpdateBarrierSet(oopDesc::bs(), addr); | |
948 } | |
949 | |
950 void SharkTopLevelBlock::do_return(BasicType type) { | |
951 if (target()->intrinsic_id() == vmIntrinsics::_Object_init) | |
952 call_register_finalizer(local(0)->jobject_value()); | |
953 maybe_add_safepoint(); | |
954 handle_return(type, NULL); | |
955 } | |
956 | |
957 void SharkTopLevelBlock::do_athrow() { | |
958 SharkValue *exception = pop(); | |
959 check_null(exception); | |
960 handle_exception(exception->jobject_value(), EX_CHECK_FULL); | |
961 } | |
962 | |
963 void SharkTopLevelBlock::do_goto() { | |
964 do_branch(ciTypeFlow::GOTO_TARGET); | |
965 } | |
966 | |
967 void SharkTopLevelBlock::do_jsr() { | |
968 push(SharkValue::address_constant(iter()->next_bci())); | |
969 do_branch(ciTypeFlow::GOTO_TARGET); | |
970 } | |
971 | |
972 void SharkTopLevelBlock::do_ret() { | |
973 assert(local(iter()->get_index())->address_value() == | |
974 successor(ciTypeFlow::GOTO_TARGET)->start(), "should be"); | |
975 do_branch(ciTypeFlow::GOTO_TARGET); | |
976 } | |
977 | |
978 // All propagation of state from one block to the next (via | |
979 // dest->add_incoming) is handled by these methods: | |
980 // do_branch | |
981 // do_if_helper | |
982 // do_switch | |
983 // handle_exception | |
984 | |
985 void SharkTopLevelBlock::do_branch(int successor_index) { | |
986 SharkTopLevelBlock *dest = successor(successor_index); | |
987 builder()->CreateBr(dest->entry_block()); | |
988 dest->add_incoming(current_state()); | |
989 } | |
990 | |
991 void SharkTopLevelBlock::do_if(ICmpInst::Predicate p, | |
992 SharkValue* b, | |
993 SharkValue* a) { | |
994 Value *llvm_a, *llvm_b; | |
995 if (a->is_jobject()) { | |
996 llvm_a = a->intptr_value(builder()); | |
997 llvm_b = b->intptr_value(builder()); | |
998 } | |
999 else { | |
1000 llvm_a = a->jint_value(); | |
1001 llvm_b = b->jint_value(); | |
1002 } | |
1003 do_if_helper(p, llvm_b, llvm_a, current_state(), current_state()); | |
1004 } | |
1005 | |
1006 void SharkTopLevelBlock::do_if_helper(ICmpInst::Predicate p, | |
1007 Value* b, | |
1008 Value* a, | |
1009 SharkState* if_taken_state, | |
1010 SharkState* not_taken_state) { | |
1011 SharkTopLevelBlock *if_taken = successor(ciTypeFlow::IF_TAKEN); | |
1012 SharkTopLevelBlock *not_taken = successor(ciTypeFlow::IF_NOT_TAKEN); | |
1013 | |
1014 builder()->CreateCondBr( | |
1015 builder()->CreateICmp(p, a, b), | |
1016 if_taken->entry_block(), not_taken->entry_block()); | |
1017 | |
1018 if_taken->add_incoming(if_taken_state); | |
1019 not_taken->add_incoming(not_taken_state); | |
1020 } | |
1021 | |
1022 void SharkTopLevelBlock::do_switch() { | |
1023 int len = switch_table_length(); | |
1024 | |
1025 SharkTopLevelBlock *dest_block = successor(ciTypeFlow::SWITCH_DEFAULT); | |
1026 SwitchInst *switchinst = builder()->CreateSwitch( | |
1027 pop()->jint_value(), dest_block->entry_block(), len); | |
1028 dest_block->add_incoming(current_state()); | |
1029 | |
1030 for (int i = 0; i < len; i++) { | |
1031 int dest_bci = switch_dest(i); | |
1032 if (dest_bci != switch_default_dest()) { | |
1033 dest_block = bci_successor(dest_bci); | |
1034 switchinst->addCase( | |
1035 LLVMValue::jint_constant(switch_key(i)), | |
1036 dest_block->entry_block()); | |
1037 dest_block->add_incoming(current_state()); | |
1038 } | |
1039 } | |
1040 } | |
1041 | |
1042 ciMethod* SharkTopLevelBlock::improve_virtual_call(ciMethod* caller, | |
1043 ciInstanceKlass* klass, | |
1044 ciMethod* dest_method, | |
1045 ciType* receiver_type) { | |
1046 // If the method is obviously final then we are already done | |
1047 if (dest_method->can_be_statically_bound()) | |
1048 return dest_method; | |
1049 | |
1050 // Array methods are all inherited from Object and are monomorphic | |
1051 if (receiver_type->is_array_klass() && | |
1052 dest_method->holder() == java_lang_Object_klass()) | |
1053 return dest_method; | |
1054 | |
1055 // This code can replace a virtual call with a direct call if this | |
1056 // class is the only one in the entire set of loaded classes that | |
1057 // implements this method. This makes the compiled code dependent | |
1058 // on other classes that implement the method not being loaded, a | |
1059 // condition which is enforced by the dependency tracker. If the | |
1060 // dependency tracker determines a method has become invalid it | |
1061 // will mark it for recompilation, causing running copies to be | |
1062 // deoptimized. Shark currently can't deoptimize arbitrarily like | |
1063 // that, so this optimization cannot be used. | |
1064 // http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=481 | |
1065 | |
1066 // All other interesting cases are instance classes | |
1067 if (!receiver_type->is_instance_klass()) | |
1068 return NULL; | |
1069 | |
1070 // Attempt to improve the receiver | |
1071 ciInstanceKlass* actual_receiver = klass; | |
1072 ciInstanceKlass *improved_receiver = receiver_type->as_instance_klass(); | |
1073 if (improved_receiver->is_loaded() && | |
1074 improved_receiver->is_initialized() && | |
1075 !improved_receiver->is_interface() && | |
1076 improved_receiver->is_subtype_of(actual_receiver)) { | |
1077 actual_receiver = improved_receiver; | |
1078 } | |
1079 | |
1080 // Attempt to find a monomorphic target for this call using | |
1081 // class heirachy analysis. | |
1082 ciInstanceKlass *calling_klass = caller->holder(); | |
1083 ciMethod* monomorphic_target = | |
1084 dest_method->find_monomorphic_target(calling_klass, klass, actual_receiver); | |
1085 if (monomorphic_target != NULL) { | |
1086 assert(!monomorphic_target->is_abstract(), "shouldn't be"); | |
1087 | |
7599 | 1088 function()->dependencies()->assert_unique_concrete_method(actual_receiver, monomorphic_target); |
1089 | |
1692 | 1090 // Opto has a bunch of type checking here that I don't |
1091 // understand. It's to inhibit casting in one direction, | |
1092 // possibly because objects in Opto can have inexact | |
1093 // types, but I can't even tell which direction it | |
1094 // doesn't like. For now I'm going to block *any* cast. | |
1095 if (monomorphic_target != dest_method) { | |
1096 if (SharkPerformanceWarnings) { | |
1097 warning("found monomorphic target, but inhibited cast:"); | |
1098 tty->print(" dest_method = "); | |
1099 dest_method->print_short_name(tty); | |
1100 tty->cr(); | |
1101 tty->print(" monomorphic_target = "); | |
1102 monomorphic_target->print_short_name(tty); | |
1103 tty->cr(); | |
1104 } | |
1105 monomorphic_target = NULL; | |
1106 } | |
1107 } | |
1108 | |
1109 // Replace the virtual call with a direct one. This makes | |
1110 // us dependent on that target method not getting overridden | |
1111 // by dynamic class loading. | |
1112 if (monomorphic_target != NULL) { | |
1113 dependencies()->assert_unique_concrete_method( | |
1114 actual_receiver, monomorphic_target); | |
1115 return monomorphic_target; | |
1116 } | |
1117 | |
1118 // Because Opto distinguishes exact types from inexact ones | |
1119 // it can perform a further optimization to replace calls | |
1120 // with non-monomorphic targets if the receiver has an exact | |
1121 // type. We don't mark types this way, so we can't do this. | |
1122 | |
1123 | |
1124 return NULL; | |
1125 } | |
1126 | |
1127 Value *SharkTopLevelBlock::get_direct_callee(ciMethod* method) { | |
1128 return builder()->CreateBitCast( | |
7195 | 1129 builder()->CreateInlineMetadata(method, SharkType::Method_type()), |
1130 SharkType::Method_type(), | |
1131 "callee"); | |
1692 | 1132 } |
1133 | |
1134 Value *SharkTopLevelBlock::get_virtual_callee(SharkValue* receiver, | |
1135 int vtable_index) { | |
1136 Value *klass = builder()->CreateValueOfStructEntry( | |
1137 receiver->jobject_value(), | |
1138 in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
1139 SharkType::oop_type(), | |
1140 "klass"); | |
1141 | |
1142 return builder()->CreateLoad( | |
1143 builder()->CreateArrayAddress( | |
1144 klass, | |
7195 | 1145 SharkType::Method_type(), |
1692 | 1146 vtableEntry::size() * wordSize, |
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1147 in_ByteSize(InstanceKlass::vtable_start_offset() * wordSize), |
1692 | 1148 LLVMValue::intptr_constant(vtable_index)), |
1149 "callee"); | |
1150 } | |
1151 | |
1152 Value* SharkTopLevelBlock::get_interface_callee(SharkValue *receiver, | |
1153 ciMethod* method) { | |
1154 BasicBlock *loop = function()->CreateBlock("loop"); | |
1155 BasicBlock *got_null = function()->CreateBlock("got_null"); | |
1156 BasicBlock *not_null = function()->CreateBlock("not_null"); | |
1157 BasicBlock *next = function()->CreateBlock("next"); | |
1158 BasicBlock *got_entry = function()->CreateBlock("got_entry"); | |
1159 | |
1160 // Locate the receiver's itable | |
1161 Value *object_klass = builder()->CreateValueOfStructEntry( | |
1162 receiver->jobject_value(), in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
7195 | 1163 SharkType::klass_type(), |
1692 | 1164 "object_klass"); |
1165 | |
1166 Value *vtable_start = builder()->CreateAdd( | |
1167 builder()->CreatePtrToInt(object_klass, SharkType::intptr_type()), | |
1168 LLVMValue::intptr_constant( | |
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1169 InstanceKlass::vtable_start_offset() * HeapWordSize), |
1692 | 1170 "vtable_start"); |
1171 | |
1172 Value *vtable_length = builder()->CreateValueOfStructEntry( | |
1173 object_klass, | |
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1174 in_ByteSize(InstanceKlass::vtable_length_offset() * HeapWordSize), |
1692 | 1175 SharkType::jint_type(), |
1176 "vtable_length"); | |
1177 vtable_length = | |
1178 builder()->CreateIntCast(vtable_length, SharkType::intptr_type(), false); | |
1179 | |
1180 bool needs_aligning = HeapWordsPerLong > 1; | |
1181 Value *itable_start = builder()->CreateAdd( | |
1182 vtable_start, | |
1183 builder()->CreateShl( | |
1184 vtable_length, | |
1185 LLVMValue::intptr_constant(exact_log2(vtableEntry::size() * wordSize))), | |
1186 needs_aligning ? "" : "itable_start"); | |
1187 if (needs_aligning) { | |
1188 itable_start = builder()->CreateAnd( | |
1189 builder()->CreateAdd( | |
1190 itable_start, LLVMValue::intptr_constant(BytesPerLong - 1)), | |
1191 LLVMValue::intptr_constant(~(BytesPerLong - 1)), | |
1192 "itable_start"); | |
1193 } | |
1194 | |
1195 // Locate this interface's entry in the table | |
7195 | 1196 Value *iklass = builder()->CreateInlineMetadata(method->holder(), SharkType::klass_type()); |
1692 | 1197 BasicBlock *loop_entry = builder()->GetInsertBlock(); |
1198 builder()->CreateBr(loop); | |
1199 builder()->SetInsertPoint(loop); | |
1200 PHINode *itable_entry_addr = builder()->CreatePHI( | |
7195 | 1201 SharkType::intptr_type(), 0, "itable_entry_addr"); |
1692 | 1202 itable_entry_addr->addIncoming(itable_start, loop_entry); |
1203 | |
1204 Value *itable_entry = builder()->CreateIntToPtr( | |
1205 itable_entry_addr, SharkType::itableOffsetEntry_type(), "itable_entry"); | |
1206 | |
1207 Value *itable_iklass = builder()->CreateValueOfStructEntry( | |
1208 itable_entry, | |
1209 in_ByteSize(itableOffsetEntry::interface_offset_in_bytes()), | |
7195 | 1210 SharkType::klass_type(), |
1692 | 1211 "itable_iklass"); |
1212 | |
1213 builder()->CreateCondBr( | |
7195 | 1214 builder()->CreateICmpEQ(itable_iklass, LLVMValue::nullKlass()), |
1692 | 1215 got_null, not_null); |
1216 | |
1217 // A null entry means that the class doesn't implement the | |
1218 // interface, and wasn't the same as the class checked when | |
1219 // the interface was resolved. | |
1220 builder()->SetInsertPoint(got_null); | |
1221 builder()->CreateUnimplemented(__FILE__, __LINE__); | |
1222 builder()->CreateUnreachable(); | |
1223 | |
1224 builder()->SetInsertPoint(not_null); | |
1225 builder()->CreateCondBr( | |
1226 builder()->CreateICmpEQ(itable_iklass, iklass), | |
1227 got_entry, next); | |
1228 | |
1229 builder()->SetInsertPoint(next); | |
1230 Value *next_entry = builder()->CreateAdd( | |
1231 itable_entry_addr, | |
1232 LLVMValue::intptr_constant(itableOffsetEntry::size() * wordSize)); | |
1233 builder()->CreateBr(loop); | |
1234 itable_entry_addr->addIncoming(next_entry, next); | |
1235 | |
1236 // Locate the method pointer | |
1237 builder()->SetInsertPoint(got_entry); | |
1238 Value *offset = builder()->CreateValueOfStructEntry( | |
1239 itable_entry, | |
1240 in_ByteSize(itableOffsetEntry::offset_offset_in_bytes()), | |
1241 SharkType::jint_type(), | |
1242 "offset"); | |
1243 offset = | |
1244 builder()->CreateIntCast(offset, SharkType::intptr_type(), false); | |
1245 | |
1246 return builder()->CreateLoad( | |
1247 builder()->CreateIntToPtr( | |
1248 builder()->CreateAdd( | |
1249 builder()->CreateAdd( | |
1250 builder()->CreateAdd( | |
1251 builder()->CreatePtrToInt( | |
1252 object_klass, SharkType::intptr_type()), | |
1253 offset), | |
1254 LLVMValue::intptr_constant( | |
1255 method->itable_index() * itableMethodEntry::size() * wordSize)), | |
1256 LLVMValue::intptr_constant( | |
1257 itableMethodEntry::method_offset_in_bytes())), | |
7195 | 1258 PointerType::getUnqual(SharkType::Method_type())), |
1692 | 1259 "callee"); |
1260 } | |
1261 | |
1262 void SharkTopLevelBlock::do_call() { | |
1263 // Set frequently used booleans | |
1264 bool is_static = bc() == Bytecodes::_invokestatic; | |
1265 bool is_virtual = bc() == Bytecodes::_invokevirtual; | |
1266 bool is_interface = bc() == Bytecodes::_invokeinterface; | |
1267 | |
1268 // Find the method being called | |
1269 bool will_link; | |
7195 | 1270 ciSignature* sig; |
1271 ciMethod *dest_method = iter()->get_method(will_link, &sig); | |
1272 | |
1692 | 1273 assert(will_link, "typeflow responsibility"); |
1274 assert(dest_method->is_static() == is_static, "must match bc"); | |
1275 | |
1276 // Find the class of the method being called. Note | |
1277 // that the superclass check in the second assertion | |
1278 // is to cope with a hole in the spec that allows for | |
1279 // invokeinterface instructions where the resolved | |
1280 // method is a virtual method in java.lang.Object. | |
1281 // javac doesn't generate code like that, but there's | |
1282 // no reason a compliant Java compiler might not. | |
1283 ciInstanceKlass *holder_klass = dest_method->holder(); | |
1284 assert(holder_klass->is_loaded(), "scan_for_traps responsibility"); | |
1285 assert(holder_klass->is_interface() || | |
1286 holder_klass->super() == NULL || | |
1287 !is_interface, "must match bc"); | |
7195 | 1288 |
1289 bool is_forced_virtual = is_interface && holder_klass == java_lang_Object_klass(); | |
1290 | |
1692 | 1291 ciKlass *holder = iter()->get_declared_method_holder(); |
1292 ciInstanceKlass *klass = | |
1293 ciEnv::get_instance_klass_for_declared_method_holder(holder); | |
1294 | |
7195 | 1295 if (is_forced_virtual) { |
1296 klass = java_lang_Object_klass(); | |
1297 } | |
1298 | |
1692 | 1299 // Find the receiver in the stack. We do this before |
1300 // trying to inline because the inliner can only use | |
1301 // zero-checked values, not being able to perform the | |
1302 // check itself. | |
1303 SharkValue *receiver = NULL; | |
1304 if (!is_static) { | |
1305 receiver = xstack(dest_method->arg_size() - 1); | |
1306 check_null(receiver); | |
1307 } | |
1308 | |
1309 // Try to improve non-direct calls | |
1310 bool call_is_virtual = is_virtual || is_interface; | |
1311 ciMethod *call_method = dest_method; | |
1312 if (call_is_virtual) { | |
1313 ciMethod *optimized_method = improve_virtual_call( | |
1314 target(), klass, dest_method, receiver->type()); | |
1315 if (optimized_method) { | |
1316 call_method = optimized_method; | |
1317 call_is_virtual = false; | |
1318 } | |
1319 } | |
1320 | |
1321 // Try to inline the call | |
1322 if (!call_is_virtual) { | |
7599 | 1323 if (SharkInliner::attempt_inline(call_method, current_state())) { |
1692 | 1324 return; |
7599 | 1325 } |
1692 | 1326 } |
1327 | |
1328 // Find the method we are calling | |
1329 Value *callee; | |
1330 if (call_is_virtual) { | |
7195 | 1331 if (is_virtual || is_forced_virtual) { |
1692 | 1332 assert(klass->is_linked(), "scan_for_traps responsibility"); |
1333 int vtable_index = call_method->resolve_vtable_index( | |
1334 target()->holder(), klass); | |
1335 assert(vtable_index >= 0, "should be"); | |
1336 callee = get_virtual_callee(receiver, vtable_index); | |
1337 } | |
1338 else { | |
1339 assert(is_interface, "should be"); | |
1340 callee = get_interface_callee(receiver, call_method); | |
1341 } | |
1342 } | |
1343 else { | |
1344 callee = get_direct_callee(call_method); | |
1345 } | |
1346 | |
1347 // Load the SharkEntry from the callee | |
1348 Value *base_pc = builder()->CreateValueOfStructEntry( | |
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1349 callee, Method::from_interpreted_offset(), |
1692 | 1350 SharkType::intptr_type(), |
1351 "base_pc"); | |
1352 | |
1353 // Load the entry point from the SharkEntry | |
1354 Value *entry_point = builder()->CreateLoad( | |
1355 builder()->CreateIntToPtr( | |
1356 builder()->CreateAdd( | |
1357 base_pc, | |
1358 LLVMValue::intptr_constant(in_bytes(ZeroEntry::entry_point_offset()))), | |
1359 PointerType::getUnqual( | |
1360 PointerType::getUnqual(SharkType::entry_point_type()))), | |
1361 "entry_point"); | |
1362 | |
1363 // Make the call | |
1364 decache_for_Java_call(call_method); | |
1365 Value *deoptimized_frames = builder()->CreateCall3( | |
1366 entry_point, callee, base_pc, thread()); | |
1367 | |
1368 // If the callee got deoptimized then reexecute in the interpreter | |
1369 BasicBlock *reexecute = function()->CreateBlock("reexecute"); | |
1370 BasicBlock *call_completed = function()->CreateBlock("call_completed"); | |
1371 builder()->CreateCondBr( | |
1372 builder()->CreateICmpNE(deoptimized_frames, LLVMValue::jint_constant(0)), | |
1373 reexecute, call_completed); | |
1374 | |
1375 builder()->SetInsertPoint(reexecute); | |
1376 builder()->CreateCall2( | |
1377 builder()->deoptimized_entry_point(), | |
1378 builder()->CreateSub(deoptimized_frames, LLVMValue::jint_constant(1)), | |
1379 thread()); | |
1380 builder()->CreateBr(call_completed); | |
1381 | |
1382 // Cache after the call | |
1383 builder()->SetInsertPoint(call_completed); | |
1384 cache_after_Java_call(call_method); | |
1385 | |
1386 // Check for pending exceptions | |
1387 check_pending_exception(EX_CHECK_FULL); | |
1388 | |
1389 // Mark that a safepoint check has occurred | |
1390 current_state()->set_has_safepointed(true); | |
1391 } | |
1392 | |
1393 bool SharkTopLevelBlock::static_subtype_check(ciKlass* check_klass, | |
1394 ciKlass* object_klass) { | |
1395 // If the class we're checking against is java.lang.Object | |
1396 // then this is a no brainer. Apparently this can happen | |
1397 // in reflective code... | |
1398 if (check_klass == java_lang_Object_klass()) | |
1399 return true; | |
1400 | |
1401 // Perform a subtype check. NB in opto's code for this | |
1402 // (GraphKit::static_subtype_check) it says that static | |
1403 // interface types cannot be trusted, and if opto can't | |
1404 // trust them then I assume we can't either. | |
1405 if (object_klass->is_loaded() && !object_klass->is_interface()) { | |
1406 if (object_klass == check_klass) | |
1407 return true; | |
1408 | |
1409 if (check_klass->is_loaded() && object_klass->is_subtype_of(check_klass)) | |
1410 return true; | |
1411 } | |
1412 | |
1413 return false; | |
1414 } | |
1415 | |
1416 void SharkTopLevelBlock::do_instance_check() { | |
1417 // Get the class we're checking against | |
1418 bool will_link; | |
1419 ciKlass *check_klass = iter()->get_klass(will_link); | |
1420 | |
1421 // Get the class of the object we're checking | |
1422 ciKlass *object_klass = xstack(0)->type()->as_klass(); | |
1423 | |
1424 // Can we optimize this check away? | |
1425 if (static_subtype_check(check_klass, object_klass)) { | |
1426 if (bc() == Bytecodes::_instanceof) { | |
1427 pop(); | |
1428 push(SharkValue::jint_constant(1)); | |
1429 } | |
1430 return; | |
1431 } | |
1432 | |
1433 // Need to check this one at runtime | |
1434 if (will_link) | |
1435 do_full_instance_check(check_klass); | |
1436 else | |
1437 do_trapping_instance_check(check_klass); | |
1438 } | |
1439 | |
1440 bool SharkTopLevelBlock::maybe_do_instanceof_if() { | |
1441 // Get the class we're checking against | |
1442 bool will_link; | |
1443 ciKlass *check_klass = iter()->get_klass(will_link); | |
1444 | |
1445 // If the class is unloaded then the instanceof | |
1446 // cannot possibly succeed. | |
1447 if (!will_link) | |
1448 return false; | |
1449 | |
1450 // Keep a copy of the object we're checking | |
1451 SharkValue *old_object = xstack(0); | |
1452 | |
1453 // Get the class of the object we're checking | |
1454 ciKlass *object_klass = old_object->type()->as_klass(); | |
1455 | |
1456 // If the instanceof can be optimized away at compile time | |
1457 // then any subsequent checkcasts will be too so we handle | |
1458 // it normally. | |
1459 if (static_subtype_check(check_klass, object_klass)) | |
1460 return false; | |
1461 | |
1462 // Perform the instance check | |
1463 do_full_instance_check(check_klass); | |
1464 Value *result = pop()->jint_value(); | |
1465 | |
1466 // Create the casted object | |
1467 SharkValue *new_object = SharkValue::create_generic( | |
1468 check_klass, old_object->jobject_value(), old_object->zero_checked()); | |
1469 | |
1470 // Create two copies of the current state, one with the | |
1471 // original object and one with all instances of the | |
1472 // original object replaced with the new, casted object. | |
1473 SharkState *new_state = current_state(); | |
1474 SharkState *old_state = new_state->copy(); | |
1475 new_state->replace_all(old_object, new_object); | |
1476 | |
1477 // Perform the check-and-branch | |
1478 switch (iter()->next_bc()) { | |
1479 case Bytecodes::_ifeq: | |
1480 // branch if not an instance | |
1481 do_if_helper( | |
1482 ICmpInst::ICMP_EQ, | |
1483 LLVMValue::jint_constant(0), result, | |
1484 old_state, new_state); | |
1485 break; | |
1486 | |
1487 case Bytecodes::_ifne: | |
1488 // branch if an instance | |
1489 do_if_helper( | |
1490 ICmpInst::ICMP_NE, | |
1491 LLVMValue::jint_constant(0), result, | |
1492 new_state, old_state); | |
1493 break; | |
1494 | |
1495 default: | |
1496 ShouldNotReachHere(); | |
1497 } | |
1498 | |
1499 return true; | |
1500 } | |
1501 | |
1502 void SharkTopLevelBlock::do_full_instance_check(ciKlass* klass) { | |
1503 BasicBlock *not_null = function()->CreateBlock("not_null"); | |
1504 BasicBlock *subtype_check = function()->CreateBlock("subtype_check"); | |
1505 BasicBlock *is_instance = function()->CreateBlock("is_instance"); | |
1506 BasicBlock *not_instance = function()->CreateBlock("not_instance"); | |
1507 BasicBlock *merge1 = function()->CreateBlock("merge1"); | |
1508 BasicBlock *merge2 = function()->CreateBlock("merge2"); | |
1509 | |
1510 enum InstanceCheckStates { | |
1511 IC_IS_NULL, | |
1512 IC_IS_INSTANCE, | |
1513 IC_NOT_INSTANCE, | |
1514 }; | |
1515 | |
1516 // Pop the object off the stack | |
1517 Value *object = pop()->jobject_value(); | |
1518 | |
1519 // Null objects aren't instances of anything | |
1520 builder()->CreateCondBr( | |
1521 builder()->CreateICmpEQ(object, LLVMValue::null()), | |
1522 merge2, not_null); | |
1523 BasicBlock *null_block = builder()->GetInsertBlock(); | |
1524 | |
1525 // Get the class we're checking against | |
1526 builder()->SetInsertPoint(not_null); | |
7195 | 1527 Value *check_klass = builder()->CreateInlineMetadata(klass, SharkType::klass_type()); |
1692 | 1528 |
1529 // Get the class of the object being tested | |
1530 Value *object_klass = builder()->CreateValueOfStructEntry( | |
1531 object, in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
7195 | 1532 SharkType::klass_type(), |
1692 | 1533 "object_klass"); |
1534 | |
1535 // Perform the check | |
1536 builder()->CreateCondBr( | |
1537 builder()->CreateICmpEQ(check_klass, object_klass), | |
1538 is_instance, subtype_check); | |
1539 | |
1540 builder()->SetInsertPoint(subtype_check); | |
1541 builder()->CreateCondBr( | |
1542 builder()->CreateICmpNE( | |
1543 builder()->CreateCall2( | |
1544 builder()->is_subtype_of(), check_klass, object_klass), | |
1545 LLVMValue::jbyte_constant(0)), | |
1546 is_instance, not_instance); | |
1547 | |
1548 builder()->SetInsertPoint(is_instance); | |
1549 builder()->CreateBr(merge1); | |
1550 | |
1551 builder()->SetInsertPoint(not_instance); | |
1552 builder()->CreateBr(merge1); | |
1553 | |
1554 // First merge | |
1555 builder()->SetInsertPoint(merge1); | |
1556 PHINode *nonnull_result = builder()->CreatePHI( | |
7195 | 1557 SharkType::jint_type(), 0, "nonnull_result"); |
1692 | 1558 nonnull_result->addIncoming( |
1559 LLVMValue::jint_constant(IC_IS_INSTANCE), is_instance); | |
1560 nonnull_result->addIncoming( | |
1561 LLVMValue::jint_constant(IC_NOT_INSTANCE), not_instance); | |
1562 BasicBlock *nonnull_block = builder()->GetInsertBlock(); | |
1563 builder()->CreateBr(merge2); | |
1564 | |
1565 // Second merge | |
1566 builder()->SetInsertPoint(merge2); | |
1567 PHINode *result = builder()->CreatePHI( | |
7195 | 1568 SharkType::jint_type(), 0, "result"); |
1692 | 1569 result->addIncoming(LLVMValue::jint_constant(IC_IS_NULL), null_block); |
1570 result->addIncoming(nonnull_result, nonnull_block); | |
1571 | |
1572 // Handle the result | |
1573 if (bc() == Bytecodes::_checkcast) { | |
1574 BasicBlock *failure = function()->CreateBlock("failure"); | |
1575 BasicBlock *success = function()->CreateBlock("success"); | |
1576 | |
1577 builder()->CreateCondBr( | |
1578 builder()->CreateICmpNE( | |
1579 result, LLVMValue::jint_constant(IC_NOT_INSTANCE)), | |
1580 success, failure); | |
1581 | |
1582 builder()->SetInsertPoint(failure); | |
1583 SharkState *saved_state = current_state()->copy(); | |
1584 | |
1585 call_vm( | |
1586 builder()->throw_ClassCastException(), | |
1587 builder()->CreateIntToPtr( | |
1588 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
1589 PointerType::getUnqual(SharkType::jbyte_type())), | |
1590 LLVMValue::jint_constant(__LINE__), | |
1591 EX_CHECK_NONE); | |
1592 | |
1593 Value *pending_exception = get_pending_exception(); | |
1594 clear_pending_exception(); | |
1595 handle_exception(pending_exception, EX_CHECK_FULL); | |
1596 | |
1597 set_current_state(saved_state); | |
1598 builder()->SetInsertPoint(success); | |
1599 push(SharkValue::create_generic(klass, object, false)); | |
1600 } | |
1601 else { | |
1602 push( | |
1603 SharkValue::create_jint( | |
1604 builder()->CreateIntCast( | |
1605 builder()->CreateICmpEQ( | |
1606 result, LLVMValue::jint_constant(IC_IS_INSTANCE)), | |
1607 SharkType::jint_type(), false), false)); | |
1608 } | |
1609 } | |
1610 | |
1611 void SharkTopLevelBlock::do_trapping_instance_check(ciKlass* klass) { | |
1612 BasicBlock *not_null = function()->CreateBlock("not_null"); | |
1613 BasicBlock *is_null = function()->CreateBlock("null"); | |
1614 | |
1615 // Leave the object on the stack so it's there if we trap | |
1616 builder()->CreateCondBr( | |
1617 builder()->CreateICmpEQ(xstack(0)->jobject_value(), LLVMValue::null()), | |
1618 is_null, not_null); | |
1619 SharkState *saved_state = current_state()->copy(); | |
1620 | |
1621 // If it's not null then we need to trap | |
1622 builder()->SetInsertPoint(not_null); | |
1623 set_current_state(saved_state->copy()); | |
1624 do_trap( | |
1625 Deoptimization::make_trap_request( | |
1626 Deoptimization::Reason_uninitialized, | |
1627 Deoptimization::Action_reinterpret)); | |
1628 | |
1629 // If it's null then we're ok | |
1630 builder()->SetInsertPoint(is_null); | |
1631 set_current_state(saved_state); | |
1632 if (bc() == Bytecodes::_checkcast) { | |
1633 push(SharkValue::create_generic(klass, pop()->jobject_value(), false)); | |
1634 } | |
1635 else { | |
1636 pop(); | |
1637 push(SharkValue::jint_constant(0)); | |
1638 } | |
1639 } | |
1640 | |
1641 void SharkTopLevelBlock::do_new() { | |
1642 bool will_link; | |
1643 ciInstanceKlass* klass = iter()->get_klass(will_link)->as_instance_klass(); | |
1644 assert(will_link, "typeflow responsibility"); | |
1645 | |
1646 BasicBlock *got_tlab = NULL; | |
1647 BasicBlock *heap_alloc = NULL; | |
1648 BasicBlock *retry = NULL; | |
1649 BasicBlock *got_heap = NULL; | |
1650 BasicBlock *initialize = NULL; | |
1651 BasicBlock *got_fast = NULL; | |
1652 BasicBlock *slow_alloc_and_init = NULL; | |
1653 BasicBlock *got_slow = NULL; | |
1654 BasicBlock *push_object = NULL; | |
1655 | |
1656 SharkState *fast_state = NULL; | |
1657 | |
1658 Value *tlab_object = NULL; | |
1659 Value *heap_object = NULL; | |
1660 Value *fast_object = NULL; | |
1661 Value *slow_object = NULL; | |
1662 Value *object = NULL; | |
1663 | |
1664 // The fast path | |
1665 if (!Klass::layout_helper_needs_slow_path(klass->layout_helper())) { | |
1666 if (UseTLAB) { | |
1667 got_tlab = function()->CreateBlock("got_tlab"); | |
1668 heap_alloc = function()->CreateBlock("heap_alloc"); | |
1669 } | |
1670 retry = function()->CreateBlock("retry"); | |
1671 got_heap = function()->CreateBlock("got_heap"); | |
1672 initialize = function()->CreateBlock("initialize"); | |
1673 slow_alloc_and_init = function()->CreateBlock("slow_alloc_and_init"); | |
1674 push_object = function()->CreateBlock("push_object"); | |
1675 | |
1676 size_t size_in_bytes = klass->size_helper() << LogHeapWordSize; | |
1677 | |
1678 // Thread local allocation | |
1679 if (UseTLAB) { | |
1680 Value *top_addr = builder()->CreateAddressOfStructEntry( | |
1681 thread(), Thread::tlab_top_offset(), | |
1682 PointerType::getUnqual(SharkType::intptr_type()), | |
1683 "top_addr"); | |
1684 | |
1685 Value *end = builder()->CreateValueOfStructEntry( | |
1686 thread(), Thread::tlab_end_offset(), | |
1687 SharkType::intptr_type(), | |
1688 "end"); | |
1689 | |
1690 Value *old_top = builder()->CreateLoad(top_addr, "old_top"); | |
1691 Value *new_top = builder()->CreateAdd( | |
1692 old_top, LLVMValue::intptr_constant(size_in_bytes)); | |
1693 | |
1694 builder()->CreateCondBr( | |
1695 builder()->CreateICmpULE(new_top, end), | |
1696 got_tlab, heap_alloc); | |
1697 | |
1698 builder()->SetInsertPoint(got_tlab); | |
1699 tlab_object = builder()->CreateIntToPtr( | |
1700 old_top, SharkType::oop_type(), "tlab_object"); | |
1701 | |
1702 builder()->CreateStore(new_top, top_addr); | |
1703 builder()->CreateBr(initialize); | |
1704 | |
1705 builder()->SetInsertPoint(heap_alloc); | |
1706 } | |
1707 | |
1708 // Heap allocation | |
1709 Value *top_addr = builder()->CreateIntToPtr( | |
1710 LLVMValue::intptr_constant((intptr_t) Universe::heap()->top_addr()), | |
1711 PointerType::getUnqual(SharkType::intptr_type()), | |
1712 "top_addr"); | |
1713 | |
1714 Value *end = builder()->CreateLoad( | |
1715 builder()->CreateIntToPtr( | |
1716 LLVMValue::intptr_constant((intptr_t) Universe::heap()->end_addr()), | |
1717 PointerType::getUnqual(SharkType::intptr_type())), | |
1718 "end"); | |
1719 | |
1720 builder()->CreateBr(retry); | |
1721 builder()->SetInsertPoint(retry); | |
1722 | |
1723 Value *old_top = builder()->CreateLoad(top_addr, "top"); | |
1724 Value *new_top = builder()->CreateAdd( | |
1725 old_top, LLVMValue::intptr_constant(size_in_bytes)); | |
1726 | |
1727 builder()->CreateCondBr( | |
1728 builder()->CreateICmpULE(new_top, end), | |
1729 got_heap, slow_alloc_and_init); | |
1730 | |
1731 builder()->SetInsertPoint(got_heap); | |
1732 heap_object = builder()->CreateIntToPtr( | |
1733 old_top, SharkType::oop_type(), "heap_object"); | |
1734 | |
7195 | 1735 Value *check = builder()->CreateAtomicCmpXchg(top_addr, old_top, new_top, llvm::SequentiallyConsistent); |
1692 | 1736 builder()->CreateCondBr( |
1737 builder()->CreateICmpEQ(old_top, check), | |
1738 initialize, retry); | |
1739 | |
1740 // Initialize the object | |
1741 builder()->SetInsertPoint(initialize); | |
1742 if (tlab_object) { | |
1743 PHINode *phi = builder()->CreatePHI( | |
7195 | 1744 SharkType::oop_type(), 0, "fast_object"); |
1692 | 1745 phi->addIncoming(tlab_object, got_tlab); |
1746 phi->addIncoming(heap_object, got_heap); | |
1747 fast_object = phi; | |
1748 } | |
1749 else { | |
1750 fast_object = heap_object; | |
1751 } | |
1752 | |
1753 builder()->CreateMemset( | |
1754 builder()->CreateBitCast( | |
1755 fast_object, PointerType::getUnqual(SharkType::jbyte_type())), | |
1756 LLVMValue::jbyte_constant(0), | |
1757 LLVMValue::jint_constant(size_in_bytes), | |
1758 LLVMValue::jint_constant(HeapWordSize)); | |
1759 | |
1760 Value *mark_addr = builder()->CreateAddressOfStructEntry( | |
1761 fast_object, in_ByteSize(oopDesc::mark_offset_in_bytes()), | |
1762 PointerType::getUnqual(SharkType::intptr_type()), | |
1763 "mark_addr"); | |
1764 | |
1765 Value *klass_addr = builder()->CreateAddressOfStructEntry( | |
1766 fast_object, in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
7195 | 1767 PointerType::getUnqual(SharkType::klass_type()), |
1692 | 1768 "klass_addr"); |
1769 | |
1770 // Set the mark | |
1771 intptr_t mark; | |
1772 if (UseBiasedLocking) { | |
1773 Unimplemented(); | |
1774 } | |
1775 else { | |
1776 mark = (intptr_t) markOopDesc::prototype(); | |
1777 } | |
1778 builder()->CreateStore(LLVMValue::intptr_constant(mark), mark_addr); | |
1779 | |
1780 // Set the class | |
7195 | 1781 Value *rtklass = builder()->CreateInlineMetadata(klass, SharkType::klass_type()); |
1692 | 1782 builder()->CreateStore(rtklass, klass_addr); |
1783 got_fast = builder()->GetInsertBlock(); | |
1784 | |
1785 builder()->CreateBr(push_object); | |
1786 builder()->SetInsertPoint(slow_alloc_and_init); | |
1787 fast_state = current_state()->copy(); | |
1788 } | |
1789 | |
1790 // The slow path | |
1791 call_vm( | |
1792 builder()->new_instance(), | |
1793 LLVMValue::jint_constant(iter()->get_klass_index()), | |
1794 EX_CHECK_FULL); | |
1795 slow_object = get_vm_result(); | |
1796 got_slow = builder()->GetInsertBlock(); | |
1797 | |
1798 // Push the object | |
1799 if (push_object) { | |
1800 builder()->CreateBr(push_object); | |
1801 builder()->SetInsertPoint(push_object); | |
1802 } | |
1803 if (fast_object) { | |
7195 | 1804 PHINode *phi = builder()->CreatePHI(SharkType::oop_type(), 0, "object"); |
1692 | 1805 phi->addIncoming(fast_object, got_fast); |
1806 phi->addIncoming(slow_object, got_slow); | |
1807 object = phi; | |
1808 current_state()->merge(fast_state, got_fast, got_slow); | |
1809 } | |
1810 else { | |
1811 object = slow_object; | |
1812 } | |
1813 | |
1814 push(SharkValue::create_jobject(object, true)); | |
1815 } | |
1816 | |
1817 void SharkTopLevelBlock::do_newarray() { | |
1818 BasicType type = (BasicType) iter()->get_index(); | |
1819 | |
1820 call_vm( | |
1821 builder()->newarray(), | |
1822 LLVMValue::jint_constant(type), | |
1823 pop()->jint_value(), | |
1824 EX_CHECK_FULL); | |
1825 | |
1826 ciArrayKlass *array_klass = ciArrayKlass::make(ciType::make(type)); | |
1827 push(SharkValue::create_generic(array_klass, get_vm_result(), true)); | |
1828 } | |
1829 | |
1830 void SharkTopLevelBlock::do_anewarray() { | |
1831 bool will_link; | |
1832 ciKlass *klass = iter()->get_klass(will_link); | |
1833 assert(will_link, "typeflow responsibility"); | |
1834 | |
1835 ciObjArrayKlass *array_klass = ciObjArrayKlass::make(klass); | |
1836 if (!array_klass->is_loaded()) { | |
1837 Unimplemented(); | |
1838 } | |
1839 | |
1840 call_vm( | |
1841 builder()->anewarray(), | |
1842 LLVMValue::jint_constant(iter()->get_klass_index()), | |
1843 pop()->jint_value(), | |
1844 EX_CHECK_FULL); | |
1845 | |
1846 push(SharkValue::create_generic(array_klass, get_vm_result(), true)); | |
1847 } | |
1848 | |
1849 void SharkTopLevelBlock::do_multianewarray() { | |
1850 bool will_link; | |
1851 ciArrayKlass *array_klass = iter()->get_klass(will_link)->as_array_klass(); | |
1852 assert(will_link, "typeflow responsibility"); | |
1853 | |
1854 // The dimensions are stack values, so we use their slots for the | |
1855 // dimensions array. Note that we are storing them in the reverse | |
1856 // of normal stack order. | |
1857 int ndims = iter()->get_dimensions(); | |
1858 | |
1859 Value *dimensions = stack()->slot_addr( | |
1860 stack()->stack_slots_offset() + max_stack() - xstack_depth(), | |
1861 ArrayType::get(SharkType::jint_type(), ndims), | |
1862 "dimensions"); | |
1863 | |
1864 for (int i = 0; i < ndims; i++) { | |
1865 builder()->CreateStore( | |
1866 xstack(ndims - 1 - i)->jint_value(), | |
1867 builder()->CreateStructGEP(dimensions, i)); | |
1868 } | |
1869 | |
1870 call_vm( | |
1871 builder()->multianewarray(), | |
1872 LLVMValue::jint_constant(iter()->get_klass_index()), | |
1873 LLVMValue::jint_constant(ndims), | |
1874 builder()->CreateStructGEP(dimensions, 0), | |
1875 EX_CHECK_FULL); | |
1876 | |
1877 // Now we can pop the dimensions off the stack | |
1878 for (int i = 0; i < ndims; i++) | |
1879 pop(); | |
1880 | |
1881 push(SharkValue::create_generic(array_klass, get_vm_result(), true)); | |
1882 } | |
1883 | |
1884 void SharkTopLevelBlock::acquire_method_lock() { | |
1885 Value *lockee; | |
7195 | 1886 if (target()->is_static()) { |
1692 | 1887 lockee = builder()->CreateInlineOop(target()->holder()->java_mirror()); |
7195 | 1888 } |
1692 | 1889 else |
1890 lockee = local(0)->jobject_value(); | |
1891 | |
1892 iter()->force_bci(start()); // for the decache in acquire_lock | |
1893 acquire_lock(lockee, EX_CHECK_NO_CATCH); | |
1894 } | |
1895 | |
1896 void SharkTopLevelBlock::do_monitorenter() { | |
1897 SharkValue *lockee = pop(); | |
1898 check_null(lockee); | |
1899 acquire_lock(lockee->jobject_value(), EX_CHECK_FULL); | |
1900 } | |
1901 | |
1902 void SharkTopLevelBlock::do_monitorexit() { | |
1903 pop(); // don't need this (monitors are block structured) | |
1904 release_lock(EX_CHECK_NO_CATCH); | |
1905 } | |
1906 | |
1907 void SharkTopLevelBlock::acquire_lock(Value *lockee, int exception_action) { | |
1908 BasicBlock *try_recursive = function()->CreateBlock("try_recursive"); | |
1909 BasicBlock *got_recursive = function()->CreateBlock("got_recursive"); | |
1910 BasicBlock *not_recursive = function()->CreateBlock("not_recursive"); | |
1911 BasicBlock *acquired_fast = function()->CreateBlock("acquired_fast"); | |
1912 BasicBlock *lock_acquired = function()->CreateBlock("lock_acquired"); | |
1913 | |
1914 int monitor = num_monitors(); | |
1915 Value *monitor_addr = stack()->monitor_addr(monitor); | |
1916 Value *monitor_object_addr = stack()->monitor_object_addr(monitor); | |
1917 Value *monitor_header_addr = stack()->monitor_header_addr(monitor); | |
1918 | |
1919 // Store the object and mark the slot as live | |
1920 builder()->CreateStore(lockee, monitor_object_addr); | |
1921 set_num_monitors(monitor + 1); | |
1922 | |
1923 // Try a simple lock | |
1924 Value *mark_addr = builder()->CreateAddressOfStructEntry( | |
1925 lockee, in_ByteSize(oopDesc::mark_offset_in_bytes()), | |
1926 PointerType::getUnqual(SharkType::intptr_type()), | |
1927 "mark_addr"); | |
1928 | |
1929 Value *mark = builder()->CreateLoad(mark_addr, "mark"); | |
1930 Value *disp = builder()->CreateOr( | |
1931 mark, LLVMValue::intptr_constant(markOopDesc::unlocked_value), "disp"); | |
1932 builder()->CreateStore(disp, monitor_header_addr); | |
1933 | |
1934 Value *lock = builder()->CreatePtrToInt( | |
1935 monitor_header_addr, SharkType::intptr_type()); | |
7195 | 1936 Value *check = builder()->CreateAtomicCmpXchg(mark_addr, disp, lock, llvm::Acquire); |
1692 | 1937 builder()->CreateCondBr( |
1938 builder()->CreateICmpEQ(disp, check), | |
1939 acquired_fast, try_recursive); | |
1940 | |
1941 // Locking failed, but maybe this thread already owns it | |
1942 builder()->SetInsertPoint(try_recursive); | |
1943 Value *addr = builder()->CreateAnd( | |
1944 disp, | |
1945 LLVMValue::intptr_constant(~markOopDesc::lock_mask_in_place)); | |
1946 | |
1947 // NB we use the entire stack, but JavaThread::is_lock_owned() | |
1948 // uses a more limited range. I don't think it hurts though... | |
1949 Value *stack_limit = builder()->CreateValueOfStructEntry( | |
1950 thread(), Thread::stack_base_offset(), | |
1951 SharkType::intptr_type(), | |
1952 "stack_limit"); | |
1953 | |
1954 assert(sizeof(size_t) == sizeof(intptr_t), "should be"); | |
1955 Value *stack_size = builder()->CreateValueOfStructEntry( | |
1956 thread(), Thread::stack_size_offset(), | |
1957 SharkType::intptr_type(), | |
1958 "stack_size"); | |
1959 | |
1960 Value *stack_start = | |
1961 builder()->CreateSub(stack_limit, stack_size, "stack_start"); | |
1962 | |
1963 builder()->CreateCondBr( | |
1964 builder()->CreateAnd( | |
1965 builder()->CreateICmpUGE(addr, stack_start), | |
1966 builder()->CreateICmpULT(addr, stack_limit)), | |
1967 got_recursive, not_recursive); | |
1968 | |
1969 builder()->SetInsertPoint(got_recursive); | |
1970 builder()->CreateStore(LLVMValue::intptr_constant(0), monitor_header_addr); | |
1971 builder()->CreateBr(acquired_fast); | |
1972 | |
1973 // Create an edge for the state merge | |
1974 builder()->SetInsertPoint(acquired_fast); | |
1975 SharkState *fast_state = current_state()->copy(); | |
1976 builder()->CreateBr(lock_acquired); | |
1977 | |
1978 // It's not a recursive case so we need to drop into the runtime | |
1979 builder()->SetInsertPoint(not_recursive); | |
1980 call_vm( | |
1981 builder()->monitorenter(), monitor_addr, | |
1982 exception_action | EAM_MONITOR_FUDGE); | |
1983 BasicBlock *acquired_slow = builder()->GetInsertBlock(); | |
1984 builder()->CreateBr(lock_acquired); | |
1985 | |
1986 // All done | |
1987 builder()->SetInsertPoint(lock_acquired); | |
1988 current_state()->merge(fast_state, acquired_fast, acquired_slow); | |
1989 } | |
1990 | |
1991 void SharkTopLevelBlock::release_lock(int exception_action) { | |
1992 BasicBlock *not_recursive = function()->CreateBlock("not_recursive"); | |
1993 BasicBlock *released_fast = function()->CreateBlock("released_fast"); | |
1994 BasicBlock *slow_path = function()->CreateBlock("slow_path"); | |
1995 BasicBlock *lock_released = function()->CreateBlock("lock_released"); | |
1996 | |
1997 int monitor = num_monitors() - 1; | |
1998 Value *monitor_addr = stack()->monitor_addr(monitor); | |
1999 Value *monitor_object_addr = stack()->monitor_object_addr(monitor); | |
2000 Value *monitor_header_addr = stack()->monitor_header_addr(monitor); | |
2001 | |
2002 // If it is recursive then we're already done | |
2003 Value *disp = builder()->CreateLoad(monitor_header_addr); | |
2004 builder()->CreateCondBr( | |
2005 builder()->CreateICmpEQ(disp, LLVMValue::intptr_constant(0)), | |
2006 released_fast, not_recursive); | |
2007 | |
2008 // Try a simple unlock | |
2009 builder()->SetInsertPoint(not_recursive); | |
2010 | |
2011 Value *lock = builder()->CreatePtrToInt( | |
2012 monitor_header_addr, SharkType::intptr_type()); | |
2013 | |
2014 Value *lockee = builder()->CreateLoad(monitor_object_addr); | |
2015 | |
2016 Value *mark_addr = builder()->CreateAddressOfStructEntry( | |
2017 lockee, in_ByteSize(oopDesc::mark_offset_in_bytes()), | |
2018 PointerType::getUnqual(SharkType::intptr_type()), | |
2019 "mark_addr"); | |
2020 | |
7195 | 2021 Value *check = builder()->CreateAtomicCmpXchg(mark_addr, lock, disp, llvm::Release); |
1692 | 2022 builder()->CreateCondBr( |
2023 builder()->CreateICmpEQ(lock, check), | |
2024 released_fast, slow_path); | |
2025 | |
2026 // Create an edge for the state merge | |
2027 builder()->SetInsertPoint(released_fast); | |
2028 SharkState *fast_state = current_state()->copy(); | |
2029 builder()->CreateBr(lock_released); | |
2030 | |
2031 // Need to drop into the runtime to release this one | |
2032 builder()->SetInsertPoint(slow_path); | |
2033 call_vm(builder()->monitorexit(), monitor_addr, exception_action); | |
2034 BasicBlock *released_slow = builder()->GetInsertBlock(); | |
2035 builder()->CreateBr(lock_released); | |
2036 | |
2037 // All done | |
2038 builder()->SetInsertPoint(lock_released); | |
2039 current_state()->merge(fast_state, released_fast, released_slow); | |
2040 | |
2041 // The object slot is now dead | |
2042 set_num_monitors(monitor); | |
2043 } |