1 /*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2007, 2008, 2009, 2010, 2011 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
26 #include "precompiled.hpp"
27 #include "asm/assembler.hpp"
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/cppInterpreter.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterGenerator.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "oops/arrayOop.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/atomic.inline.hpp"
41 #include "runtime/deoptimization.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/interfaceSupport.hpp"
44 #include "runtime/orderAccess.inline.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "runtime/synchronizer.hpp"
48 #include "runtime/timer.hpp"
49 #include "runtime/vframeArray.hpp"
50 #include "stack_zero.inline.hpp"
51 #include "utilities/debug.hpp"
52 #include "utilities/macros.hpp"
53 #ifdef SHARK
54 #include "shark/shark_globals.hpp"
55 #endif
56
57 #ifdef CC_INTERP
58
59 #define fixup_after_potential_safepoint() \
60 method = istate->method()
61
62 #define CALL_VM_NOCHECK_NOFIX(func) \
63 thread->set_last_Java_frame(); \
64 func; \
65 thread->reset_last_Java_frame();
66
67 #define CALL_VM_NOCHECK(func) \
68 CALL_VM_NOCHECK_NOFIX(func) \
69 fixup_after_potential_safepoint()
70
71 int CppInterpreter::normal_entry(Method* method, intptr_t UNUSED, TRAPS) {
72 JavaThread *thread = (JavaThread *) THREAD;
73
74 // Allocate and initialize our frame.
75 InterpreterFrame *frame = InterpreterFrame::build(method, CHECK_0);
76 thread->push_zero_frame(frame);
77
78 // Execute those bytecodes!
79 main_loop(0, THREAD);
80
81 // No deoptimized frames on the stack
82 return 0;
83 }
84
85 void CppInterpreter::main_loop(int recurse, TRAPS) {
86 JavaThread *thread = (JavaThread *) THREAD;
87 ZeroStack *stack = thread->zero_stack();
88
89 // If we are entering from a deopt we may need to call
90 // ourself a few times in order to get to our frame.
91 if (recurse)
92 main_loop(recurse - 1, THREAD);
93
94 InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame();
95 interpreterState istate = frame->interpreter_state();
96 Method* method = istate->method();
97
98 intptr_t *result = NULL;
99 int result_slots = 0;
100
101 while (true) {
102 // We can set up the frame anchor with everything we want at
103 // this point as we are thread_in_Java and no safepoints can
104 // occur until we go to vm mode. We do have to clear flags
105 // on return from vm but that is it.
106 thread->set_last_Java_frame();
107
108 // Call the interpreter
109 if (JvmtiExport::can_post_interpreter_events())
110 BytecodeInterpreter::runWithChecks(istate);
111 else
112 BytecodeInterpreter::run(istate);
113 fixup_after_potential_safepoint();
114
115 // Clear the frame anchor
116 thread->reset_last_Java_frame();
117
118 // Examine the message from the interpreter to decide what to do
119 if (istate->msg() == BytecodeInterpreter::call_method) {
120 Method* callee = istate->callee();
121
122 // Trim back the stack to put the parameters at the top
123 stack->set_sp(istate->stack() + 1);
124
125 // Make the call
126 Interpreter::invoke_method(callee, istate->callee_entry_point(), THREAD);
127 fixup_after_potential_safepoint();
128
129 // Convert the result
130 istate->set_stack(stack->sp() - 1);
131
132 // Restore the stack
133 stack->set_sp(istate->stack_limit() + 1);
134
135 // Resume the interpreter
136 istate->set_msg(BytecodeInterpreter::method_resume);
137 }
138 else if (istate->msg() == BytecodeInterpreter::more_monitors) {
139 int monitor_words = frame::interpreter_frame_monitor_size();
140
141 // Allocate the space
142 stack->overflow_check(monitor_words, THREAD);
143 if (HAS_PENDING_EXCEPTION)
144 break;
145 stack->alloc(monitor_words * wordSize);
146
147 // Move the expression stack contents
148 for (intptr_t *p = istate->stack() + 1; p < istate->stack_base(); p++)
149 *(p - monitor_words) = *p;
150
151 // Move the expression stack pointers
152 istate->set_stack_limit(istate->stack_limit() - monitor_words);
153 istate->set_stack(istate->stack() - monitor_words);
154 istate->set_stack_base(istate->stack_base() - monitor_words);
155
156 // Zero the new monitor so the interpreter can find it.
157 ((BasicObjectLock *) istate->stack_base())->set_obj(NULL);
158
159 // Resume the interpreter
160 istate->set_msg(BytecodeInterpreter::got_monitors);
161 }
162 else if (istate->msg() == BytecodeInterpreter::return_from_method) {
163 // Copy the result into the caller's frame
164 result_slots = type2size[result_type_of(method)];
165 assert(result_slots >= 0 && result_slots <= 2, "what?");
166 result = istate->stack() + result_slots;
167 break;
168 }
169 else if (istate->msg() == BytecodeInterpreter::throwing_exception) {
170 assert(HAS_PENDING_EXCEPTION, "should do");
171 break;
172 }
173 else if (istate->msg() == BytecodeInterpreter::do_osr) {
174 // Unwind the current frame
175 thread->pop_zero_frame();
176
177 // Remove any extension of the previous frame
178 int extra_locals = method->max_locals() - method->size_of_parameters();
179 stack->set_sp(stack->sp() + extra_locals);
180
181 // Jump into the OSR method
182 Interpreter::invoke_osr(
183 method, istate->osr_entry(), istate->osr_buf(), THREAD);
184 return;
185 }
186 else {
187 ShouldNotReachHere();
188 }
189 }
190
191 // Unwind the current frame
192 thread->pop_zero_frame();
193
194 // Pop our local variables
195 stack->set_sp(stack->sp() + method->max_locals());
196
197 // Push our result
198 for (int i = 0; i < result_slots; i++)
199 stack->push(result[-i]);
200 }
201
202 int CppInterpreter::native_entry(Method* method, intptr_t UNUSED, TRAPS) {
203 // Make sure method is native and not abstract
204 assert(method->is_native() && !method->is_abstract(), "should be");
205
206 JavaThread *thread = (JavaThread *) THREAD;
207 ZeroStack *stack = thread->zero_stack();
208
209 // Allocate and initialize our frame
210 InterpreterFrame *frame = InterpreterFrame::build(method, CHECK_0);
211 thread->push_zero_frame(frame);
212 interpreterState istate = frame->interpreter_state();
213 intptr_t *locals = istate->locals();
214
215 // Update the invocation counter
216 if ((UseCompiler || CountCompiledCalls) && !method->is_synchronized()) {
217 MethodCounters* mcs = method->method_counters();
218 if (mcs == NULL) {
219 CALL_VM_NOCHECK(mcs = InterpreterRuntime::build_method_counters(thread, method));
220 if (HAS_PENDING_EXCEPTION)
221 goto unwind_and_return;
222 }
223 InvocationCounter *counter = mcs->invocation_counter();
224 counter->increment();
225 if (counter->reached_InvocationLimit(mcs->backedge_counter())) {
226 CALL_VM_NOCHECK(
227 InterpreterRuntime::frequency_counter_overflow(thread, NULL));
228 if (HAS_PENDING_EXCEPTION)
229 goto unwind_and_return;
230 }
231 }
232
233 // Lock if necessary
234 BasicObjectLock *monitor;
235 monitor = NULL;
236 if (method->is_synchronized()) {
237 monitor = (BasicObjectLock*) istate->stack_base();
238 oop lockee = monitor->obj();
239 markOop disp = lockee->mark()->set_unlocked();
240
241 monitor->lock()->set_displaced_header(disp);
242 if (Atomic::cmpxchg_ptr(monitor, lockee->mark_addr(), disp) != disp) {
243 if (thread->is_lock_owned((address) disp->clear_lock_bits())) {
244 monitor->lock()->set_displaced_header(NULL);
245 }
246 else {
247 CALL_VM_NOCHECK(InterpreterRuntime::monitorenter(thread, monitor));
248 if (HAS_PENDING_EXCEPTION)
249 goto unwind_and_return;
250 }
251 }
252 }
253
254 // Get the signature handler
255 InterpreterRuntime::SignatureHandler *handler; {
256 address handlerAddr = method->signature_handler();
257 if (handlerAddr == NULL) {
258 CALL_VM_NOCHECK(InterpreterRuntime::prepare_native_call(thread, method));
259 if (HAS_PENDING_EXCEPTION)
260 goto unlock_unwind_and_return;
261
262 handlerAddr = method->signature_handler();
263 assert(handlerAddr != NULL, "eh?");
264 }
265 if (handlerAddr == (address) InterpreterRuntime::slow_signature_handler) {
266 CALL_VM_NOCHECK(handlerAddr =
267 InterpreterRuntime::slow_signature_handler(thread, method, NULL,NULL));
268 if (HAS_PENDING_EXCEPTION)
269 goto unlock_unwind_and_return;
270 }
271 handler = \
272 InterpreterRuntime::SignatureHandler::from_handlerAddr(handlerAddr);
273 }
274
275 // Get the native function entry point
276 address function;
277 function = method->native_function();
278 assert(function != NULL, "should be set if signature handler is");
279
280 // Build the argument list
281 stack->overflow_check(handler->argument_count() * 2, THREAD);
282 if (HAS_PENDING_EXCEPTION)
283 goto unlock_unwind_and_return;
284
285 void **arguments;
286 void *mirror; {
287 arguments =
288 (void **) stack->alloc(handler->argument_count() * sizeof(void **));
289 void **dst = arguments;
290
291 void *env = thread->jni_environment();
292 *(dst++) = &env;
293
294 if (method->is_static()) {
295 istate->set_oop_temp(
296 method->constants()->pool_holder()->java_mirror());
297 mirror = istate->oop_temp_addr();
298 *(dst++) = &mirror;
299 }
300
301 intptr_t *src = locals;
302 for (int i = dst - arguments; i < handler->argument_count(); i++) {
303 ffi_type *type = handler->argument_type(i);
304 if (type == &ffi_type_pointer) {
305 if (*src) {
306 stack->push((intptr_t) src);
307 *(dst++) = stack->sp();
308 }
309 else {
310 *(dst++) = src;
311 }
312 src--;
313 }
314 else if (type->size == 4) {
315 *(dst++) = src--;
316 }
317 else if (type->size == 8) {
318 src--;
319 *(dst++) = src--;
320 }
321 else {
322 ShouldNotReachHere();
323 }
324 }
325 }
326
327 // Set up the Java frame anchor
328 thread->set_last_Java_frame();
329
330 // Change the thread state to _thread_in_native
331 ThreadStateTransition::transition_from_java(thread, _thread_in_native);
332
333 // Make the call
334 intptr_t result[4 - LogBytesPerWord];
335 ffi_call(handler->cif(), (void (*)()) function, result, arguments);
336
337 // Change the thread state back to _thread_in_Java.
338 // ThreadStateTransition::transition_from_native() cannot be used
339 // here because it does not check for asynchronous exceptions.
340 // We have to manage the transition ourself.
341 thread->set_thread_state(_thread_in_native_trans);
342
343 // Make sure new state is visible in the GC thread
344 if (os::is_MP()) {
345 if (UseMembar) {
346 OrderAccess::fence();
347 }
348 else {
349 InterfaceSupport::serialize_memory(thread);
350 }
351 }
352
353 // Handle safepoint operations, pending suspend requests,
354 // and pending asynchronous exceptions.
355 if (SafepointSynchronize::do_call_back() ||
356 thread->has_special_condition_for_native_trans()) {
357 JavaThread::check_special_condition_for_native_trans(thread);
358 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops());
359 }
360
361 // Finally we can change the thread state to _thread_in_Java.
362 thread->set_thread_state(_thread_in_Java);
363 fixup_after_potential_safepoint();
364
365 // Clear the frame anchor
366 thread->reset_last_Java_frame();
367
368 // If the result was an oop then unbox it and store it in
369 // oop_temp where the garbage collector can see it before
370 // we release the handle it might be protected by.
371 if (handler->result_type() == &ffi_type_pointer) {
372 if (result[0])
373 istate->set_oop_temp(*(oop *) result[0]);
374 else
375 istate->set_oop_temp(NULL);
376 }
377
378 // Reset handle block
379 thread->active_handles()->clear();
380
381 unlock_unwind_and_return:
382
383 // Unlock if necessary
384 if (monitor) {
385 BasicLock *lock = monitor->lock();
386 markOop header = lock->displaced_header();
387 oop rcvr = monitor->obj();
388 monitor->set_obj(NULL);
389
390 if (header != NULL) {
391 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) {
392 monitor->set_obj(rcvr); {
393 HandleMark hm(thread);
394 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(thread, monitor));
395 }
396 }
397 }
398 }
399
400 unwind_and_return:
401
402 // Unwind the current activation
403 thread->pop_zero_frame();
404
405 // Pop our parameters
406 stack->set_sp(stack->sp() + method->size_of_parameters());
407
408 // Push our result
409 if (!HAS_PENDING_EXCEPTION) {
410 BasicType type = result_type_of(method);
411 stack->set_sp(stack->sp() - type2size[type]);
412
413 switch (type) {
414 case T_VOID:
415 break;
416
417 case T_BOOLEAN:
418 #ifndef VM_LITTLE_ENDIAN
419 result[0] <<= (BitsPerWord - BitsPerByte);
420 #endif
421 SET_LOCALS_INT(*(jboolean *) result != 0, 0);
422 break;
423
424 case T_CHAR:
425 #ifndef VM_LITTLE_ENDIAN
426 result[0] <<= (BitsPerWord - BitsPerShort);
427 #endif
428 SET_LOCALS_INT(*(jchar *) result, 0);
429 break;
430
431 case T_BYTE:
432 #ifndef VM_LITTLE_ENDIAN
433 result[0] <<= (BitsPerWord - BitsPerByte);
434 #endif
435 SET_LOCALS_INT(*(jbyte *) result, 0);
436 break;
437
438 case T_SHORT:
439 #ifndef VM_LITTLE_ENDIAN
440 result[0] <<= (BitsPerWord - BitsPerShort);
441 #endif
442 SET_LOCALS_INT(*(jshort *) result, 0);
443 break;
444
445 case T_INT:
446 #ifndef VM_LITTLE_ENDIAN
447 result[0] <<= (BitsPerWord - BitsPerInt);
448 #endif
449 SET_LOCALS_INT(*(jint *) result, 0);
450 break;
451
452 case T_LONG:
453 SET_LOCALS_LONG(*(jlong *) result, 0);
454 break;
455
456 case T_FLOAT:
457 SET_LOCALS_FLOAT(*(jfloat *) result, 0);
458 break;
459
460 case T_DOUBLE:
461 SET_LOCALS_DOUBLE(*(jdouble *) result, 0);
462 break;
463
464 case T_OBJECT:
465 case T_ARRAY:
466 SET_LOCALS_OBJECT(istate->oop_temp(), 0);
467 break;
468
469 default:
470 ShouldNotReachHere();
471 }
472 }
473
474 // No deoptimized frames on the stack
475 return 0;
476 }
477
478 int CppInterpreter::accessor_entry(Method* method, intptr_t UNUSED, TRAPS) {
479 JavaThread *thread = (JavaThread *) THREAD;
480 ZeroStack *stack = thread->zero_stack();
481 intptr_t *locals = stack->sp();
482
483 // Drop into the slow path if we need a safepoint check
484 if (SafepointSynchronize::do_call_back()) {
485 return normal_entry(method, 0, THREAD);
486 }
487
488 // Load the object pointer and drop into the slow path
489 // if we have a NullPointerException
490 oop object = LOCALS_OBJECT(0);
491 if (object == NULL) {
492 return normal_entry(method, 0, THREAD);
493 }
494
495 // Read the field index from the bytecode, which looks like this:
496 // 0: aload_0
497 // 1: getfield
498 // 2: index
499 // 3: index
500 // 4: ireturn/areturn
501 // NB this is not raw bytecode: index is in machine order
502 u1 *code = method->code_base();
503 assert(code[0] == Bytecodes::_aload_0 &&
504 code[1] == Bytecodes::_getfield &&
505 (code[4] == Bytecodes::_ireturn ||
506 code[4] == Bytecodes::_areturn), "should do");
507 u2 index = Bytes::get_native_u2(&code[2]);
508
509 // Get the entry from the constant pool cache, and drop into
510 // the slow path if it has not been resolved
511 ConstantPoolCache* cache = method->constants()->cache();
512 ConstantPoolCacheEntry* entry = cache->entry_at(index);
513 if (!entry->is_resolved(Bytecodes::_getfield)) {
514 return normal_entry(method, 0, THREAD);
515 }
516
517 // Get the result and push it onto the stack
518 switch (entry->flag_state()) {
519 case ltos:
520 case dtos:
521 stack->overflow_check(1, CHECK_0);
522 stack->alloc(wordSize);
523 break;
524 }
525 if (entry->is_volatile()) {
526 switch (entry->flag_state()) {
527 case ctos:
528 SET_LOCALS_INT(object->char_field_acquire(entry->f2_as_index()), 0);
529 break;
530
531 case btos:
532 SET_LOCALS_INT(object->byte_field_acquire(entry->f2_as_index()), 0);
533 break;
534
535 case stos:
536 SET_LOCALS_INT(object->short_field_acquire(entry->f2_as_index()), 0);
537 break;
538
539 case itos:
540 SET_LOCALS_INT(object->int_field_acquire(entry->f2_as_index()), 0);
541 break;
542
543 case ltos:
544 SET_LOCALS_LONG(object->long_field_acquire(entry->f2_as_index()), 0);
545 break;
546
547 case ftos:
548 SET_LOCALS_FLOAT(object->float_field_acquire(entry->f2_as_index()), 0);
549 break;
550
551 case dtos:
552 SET_LOCALS_DOUBLE(object->double_field_acquire(entry->f2_as_index()), 0);
553 break;
554
555 case atos:
556 SET_LOCALS_OBJECT(object->obj_field_acquire(entry->f2_as_index()), 0);
557 break;
558
559 default:
560 ShouldNotReachHere();
561 }
562 }
563 else {
564 switch (entry->flag_state()) {
565 case ctos:
566 SET_LOCALS_INT(object->char_field(entry->f2_as_index()), 0);
567 break;
568
569 case btos:
570 SET_LOCALS_INT(object->byte_field(entry->f2_as_index()), 0);
571 break;
572
573 case stos:
574 SET_LOCALS_INT(object->short_field(entry->f2_as_index()), 0);
575 break;
576
577 case itos:
578 SET_LOCALS_INT(object->int_field(entry->f2_as_index()), 0);
579 break;
580
581 case ltos:
582 SET_LOCALS_LONG(object->long_field(entry->f2_as_index()), 0);
583 break;
584
585 case ftos:
586 SET_LOCALS_FLOAT(object->float_field(entry->f2_as_index()), 0);
587 break;
588
589 case dtos:
590 SET_LOCALS_DOUBLE(object->double_field(entry->f2_as_index()), 0);
591 break;
592
593 case atos:
594 SET_LOCALS_OBJECT(object->obj_field(entry->f2_as_index()), 0);
595 break;
596
597 default:
598 ShouldNotReachHere();
599 }
600 }
601
602 // No deoptimized frames on the stack
603 return 0;
604 }
605
606 int CppInterpreter::empty_entry(Method* method, intptr_t UNUSED, TRAPS) {
607 JavaThread *thread = (JavaThread *) THREAD;
608 ZeroStack *stack = thread->zero_stack();
609
610 // Drop into the slow path if we need a safepoint check
611 if (SafepointSynchronize::do_call_back()) {
612 return normal_entry(method, 0, THREAD);
613 }
614
615 // Pop our parameters
616 stack->set_sp(stack->sp() + method->size_of_parameters());
617
618 // No deoptimized frames on the stack
619 return 0;
620 }
621
622 // The new slots will be inserted before slot insert_before.
623 // Slots < insert_before will have the same slot number after the insert.
624 // Slots >= insert_before will become old_slot + num_slots.
625 void CppInterpreter::insert_vmslots(int insert_before, int num_slots, TRAPS) {
626 JavaThread *thread = (JavaThread *) THREAD;
627 ZeroStack *stack = thread->zero_stack();
628
629 // Allocate the space
630 stack->overflow_check(num_slots, CHECK);
631 stack->alloc(num_slots * wordSize);
632 intptr_t *vmslots = stack->sp();
633
634 // Shuffle everything up
635 for (int i = 0; i < insert_before; i++)
636 SET_VMSLOTS_SLOT(VMSLOTS_SLOT(i + num_slots), i);
637 }
638
639 void CppInterpreter::remove_vmslots(int first_slot, int num_slots, TRAPS) {
640 JavaThread *thread = (JavaThread *) THREAD;
641 ZeroStack *stack = thread->zero_stack();
642 intptr_t *vmslots = stack->sp();
643
644 // Move everything down
645 for (int i = first_slot - 1; i >= 0; i--)
646 SET_VMSLOTS_SLOT(VMSLOTS_SLOT(i), i + num_slots);
647
648 // Deallocate the space
649 stack->set_sp(stack->sp() + num_slots);
650 }
651
652 BasicType CppInterpreter::result_type_of_handle(oop method_handle) {
653 oop method_type = java_lang_invoke_MethodHandle::type(method_handle);
654 oop return_type = java_lang_invoke_MethodType::rtype(method_type);
655 return java_lang_Class::as_BasicType(return_type, (Klass* *) NULL);
656 }
657
658 intptr_t* CppInterpreter::calculate_unwind_sp(ZeroStack* stack,
659 oop method_handle) {
660 oop method_type = java_lang_invoke_MethodHandle::type(method_handle);
661 int argument_slots = java_lang_invoke_MethodType::ptype_slot_count(method_type);
662
663 return stack->sp() + argument_slots;
664 }
665
666 IRT_ENTRY(void, CppInterpreter::throw_exception(JavaThread* thread,
667 Symbol* name,
668 char* message))
669 THROW_MSG(name, message);
670 IRT_END
671
672 InterpreterFrame *InterpreterFrame::build(Method* const method, TRAPS) {
673 JavaThread *thread = (JavaThread *) THREAD;
674 ZeroStack *stack = thread->zero_stack();
675
676 // Calculate the size of the frame we'll build, including
677 // any adjustments to the caller's frame that we'll make.
678 int extra_locals = 0;
679 int monitor_words = 0;
680 int stack_words = 0;
681
682 if (!method->is_native()) {
683 extra_locals = method->max_locals() - method->size_of_parameters();
684 stack_words = method->max_stack();
685 }
686 if (method->is_synchronized()) {
687 monitor_words = frame::interpreter_frame_monitor_size();
688 }
689 stack->overflow_check(
690 extra_locals + header_words + monitor_words + stack_words, CHECK_NULL);
691
692 // Adjust the caller's stack frame to accomodate any additional
693 // local variables we have contiguously with our parameters.
694 for (int i = 0; i < extra_locals; i++)
695 stack->push(0);
696
697 intptr_t *locals;
698 if (method->is_native())
699 locals = stack->sp() + (method->size_of_parameters() - 1);
700 else
701 locals = stack->sp() + (method->max_locals() - 1);
702
703 stack->push(0); // next_frame, filled in later
704 intptr_t *fp = stack->sp();
705 assert(fp - stack->sp() == next_frame_off, "should be");
706
707 stack->push(INTERPRETER_FRAME);
708 assert(fp - stack->sp() == frame_type_off, "should be");
709
710 interpreterState istate =
711 (interpreterState) stack->alloc(sizeof(BytecodeInterpreter));
712 assert(fp - stack->sp() == istate_off, "should be");
713
714 istate->set_locals(locals);
715 istate->set_method(method);
716 istate->set_self_link(istate);
717 istate->set_prev_link(NULL);
718 istate->set_thread(thread);
719 istate->set_bcp(method->is_native() ? NULL : method->code_base());
720 istate->set_constants(method->constants()->cache());
721 istate->set_msg(BytecodeInterpreter::method_entry);
722 istate->set_oop_temp(NULL);
723 istate->set_mdx(NULL);
724 istate->set_callee(NULL);
725
726 istate->set_monitor_base((BasicObjectLock *) stack->sp());
727 if (method->is_synchronized()) {
728 BasicObjectLock *monitor =
729 (BasicObjectLock *) stack->alloc(monitor_words * wordSize);
730 oop object;
731 if (method->is_static())
732 object = method->constants()->pool_holder()->java_mirror();
733 else
734 object = (oop) (void*)locals[0];
735 monitor->set_obj(object);
736 }
737
738 istate->set_stack_base(stack->sp());
739 istate->set_stack(stack->sp() - 1);
740 if (stack_words)
741 stack->alloc(stack_words * wordSize);
742 istate->set_stack_limit(stack->sp() - 1);
743
744 return (InterpreterFrame *) fp;
745 }
746
747 int AbstractInterpreter::BasicType_as_index(BasicType type) {
748 int i = 0;
749 switch (type) {
750 case T_BOOLEAN: i = 0; break;
751 case T_CHAR : i = 1; break;
752 case T_BYTE : i = 2; break;
753 case T_SHORT : i = 3; break;
754 case T_INT : i = 4; break;
755 case T_LONG : i = 5; break;
756 case T_VOID : i = 6; break;
757 case T_FLOAT : i = 7; break;
758 case T_DOUBLE : i = 8; break;
759 case T_OBJECT : i = 9; break;
760 case T_ARRAY : i = 9; break;
761 default : ShouldNotReachHere();
762 }
763 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
764 "index out of bounds");
765 return i;
766 }
767
768 BasicType CppInterpreter::result_type_of(Method* method) {
769 BasicType t;
770 switch (method->result_index()) {
771 case 0 : t = T_BOOLEAN; break;
772 case 1 : t = T_CHAR; break;
773 case 2 : t = T_BYTE; break;
774 case 3 : t = T_SHORT; break;
775 case 4 : t = T_INT; break;
776 case 5 : t = T_LONG; break;
777 case 6 : t = T_VOID; break;
778 case 7 : t = T_FLOAT; break;
779 case 8 : t = T_DOUBLE; break;
780 case 9 : t = T_OBJECT; break;
781 default: ShouldNotReachHere();
782 }
783 assert(AbstractInterpreter::BasicType_as_index(t) == method->result_index(),
784 "out of step with AbstractInterpreter::BasicType_as_index");
785 return t;
786 }
787
788 address InterpreterGenerator::generate_empty_entry() {
789 if (!UseFastEmptyMethods)
790 return NULL;
791
792 return generate_entry((address) CppInterpreter::empty_entry);
793 }
794
795 address InterpreterGenerator::generate_accessor_entry() {
796 if (!UseFastAccessorMethods)
797 return NULL;
798
799 return generate_entry((address) CppInterpreter::accessor_entry);
800 }
801
802 address InterpreterGenerator::generate_Reference_get_entry(void) {
803 #if INCLUDE_ALL_GCS
804 if (UseG1GC) {
805 // We need to generate have a routine that generates code to:
806 // * load the value in the referent field
807 // * passes that value to the pre-barrier.
808 //
809 // In the case of G1 this will record the value of the
810 // referent in an SATB buffer if marking is active.
811 // This will cause concurrent marking to mark the referent
812 // field as live.
813 Unimplemented();
814 }
815 #endif // INCLUDE_ALL_GCS
816
817 // If G1 is not enabled then attempt to go through the normal entry point
818 // Reference.get could be instrumented by jvmti
819 return generate_normal_entry(false);
820 }
821
822 address InterpreterGenerator::generate_native_entry(bool synchronized) {
823 return generate_entry((address) CppInterpreter::native_entry);
824 }
825
826 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
827 return generate_entry((address) CppInterpreter::normal_entry);
828 }
829
830
831 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
832 : CppInterpreterGenerator(code) {
833 generate_all();
834 }
835
836 // Deoptimization helpers
837
838 InterpreterFrame *InterpreterFrame::build(int size, TRAPS) {
839 ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
840
841 int size_in_words = size >> LogBytesPerWord;
842 assert(size_in_words * wordSize == size, "unaligned");
843 assert(size_in_words >= header_words, "too small");
844 stack->overflow_check(size_in_words, CHECK_NULL);
845
846 stack->push(0); // next_frame, filled in later
847 intptr_t *fp = stack->sp();
848 assert(fp - stack->sp() == next_frame_off, "should be");
849
850 stack->push(INTERPRETER_FRAME);
851 assert(fp - stack->sp() == frame_type_off, "should be");
852
853 interpreterState istate =
854 (interpreterState) stack->alloc(sizeof(BytecodeInterpreter));
855 assert(fp - stack->sp() == istate_off, "should be");
856 istate->set_self_link(NULL); // mark invalid
857
858 stack->alloc((size_in_words - header_words) * wordSize);
859
860 return (InterpreterFrame *) fp;
861 }
862
863 int AbstractInterpreter::size_activation(int max_stack,
864 int tempcount,
865 int extra_args,
866 int moncount,
867 int callee_param_count,
868 int callee_locals,
869 bool is_top_frame) {
870 int header_words = InterpreterFrame::header_words;
871 int monitor_words = moncount * frame::interpreter_frame_monitor_size();
872 int stack_words = is_top_frame ? max_stack : tempcount;
873 int callee_extra_locals = callee_locals - callee_param_count;
874
875 return header_words + monitor_words + stack_words + callee_extra_locals;
876 }
877
878 void AbstractInterpreter::layout_activation(Method* method,
879 int tempcount,
880 int popframe_extra_args,
881 int moncount,
882 int caller_actual_parameters,
883 int callee_param_count,
884 int callee_locals,
885 frame* caller,
886 frame* interpreter_frame,
887 bool is_top_frame,
888 bool is_bottom_frame) {
889 assert(popframe_extra_args == 0, "what to do?");
890 assert(!is_top_frame || (!callee_locals && !callee_param_count),
891 "top frame should have no caller");
892
893 // This code must exactly match what InterpreterFrame::build
894 // does (the full InterpreterFrame::build, that is, not the
895 // one that creates empty frames for the deoptimizer).
896 //
897 // interpreter_frame will be filled in. It's size is determined by
898 // a previous call to the size_activation() method,
899 //
900 // Note that tempcount is the current size of the expression
901 // stack. For top most frames we will allocate a full sized
902 // expression stack and not the trimmed version that non-top
903 // frames have.
904
905 int monitor_words = moncount * frame::interpreter_frame_monitor_size();
906 intptr_t *locals = interpreter_frame->fp() + method->max_locals();
907 interpreterState istate = interpreter_frame->get_interpreterState();
908 intptr_t *monitor_base = (intptr_t*) istate;
909 intptr_t *stack_base = monitor_base - monitor_words;
910 intptr_t *stack = stack_base - tempcount - 1;
911
912 BytecodeInterpreter::layout_interpreterState(istate,
913 caller,
914 NULL,
915 method,
916 locals,
917 stack,
918 stack_base,
919 monitor_base,
920 NULL,
921 is_top_frame);
922 }
923
924 void BytecodeInterpreter::layout_interpreterState(interpreterState istate,
925 frame* caller,
926 frame* current,
927 Method* method,
928 intptr_t* locals,
929 intptr_t* stack,
930 intptr_t* stack_base,
931 intptr_t* monitor_base,
932 intptr_t* frame_bottom,
933 bool is_top_frame) {
934 istate->set_locals(locals);
935 istate->set_method(method);
936 istate->set_self_link(istate);
937 istate->set_prev_link(NULL);
938 // thread will be set by a hacky repurposing of frame::patch_pc()
939 // bcp will be set by vframeArrayElement::unpack_on_stack()
940 istate->set_constants(method->constants()->cache());
941 istate->set_msg(BytecodeInterpreter::method_resume);
942 istate->set_bcp_advance(0);
943 istate->set_oop_temp(NULL);
944 istate->set_mdx(NULL);
945 if (caller->is_interpreted_frame()) {
946 interpreterState prev = caller->get_interpreterState();
947 prev->set_callee(method);
948 if (*prev->bcp() == Bytecodes::_invokeinterface)
949 prev->set_bcp_advance(5);
950 else
951 prev->set_bcp_advance(3);
952 }
953 istate->set_callee(NULL);
954 istate->set_monitor_base((BasicObjectLock *) monitor_base);
955 istate->set_stack_base(stack_base);
956 istate->set_stack(stack);
957 istate->set_stack_limit(stack_base - method->max_stack() - 1);
958 }
959
960 address CppInterpreter::return_entry(TosState state, int length, Bytecodes::Code code) {
961 ShouldNotCallThis();
962 return NULL;
963 }
964
965 address CppInterpreter::deopt_entry(TosState state, int length) {
966 return NULL;
967 }
968
969 // Helper for (runtime) stack overflow checks
970
971 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
972 return 0;
973 }
974
975 // Helper for figuring out if frames are interpreter frames
976
977 bool CppInterpreter::contains(address pc) {
978 return false; // make frame::print_value_on work
979 }
980
981 // Result handlers and convertors
982
983 address CppInterpreterGenerator::generate_result_handler_for(
984 BasicType type) {
985 assembler()->advance(1);
986 return ShouldNotCallThisStub();
987 }
988
989 address CppInterpreterGenerator::generate_tosca_to_stack_converter(
990 BasicType type) {
991 assembler()->advance(1);
992 return ShouldNotCallThisStub();
993 }
994
995 address CppInterpreterGenerator::generate_stack_to_stack_converter(
996 BasicType type) {
997 assembler()->advance(1);
998 return ShouldNotCallThisStub();
999 }
1000
1001 address CppInterpreterGenerator::generate_stack_to_native_abi_converter(
1002 BasicType type) {
1003 assembler()->advance(1);
1004 return ShouldNotCallThisStub();
1005 }
1006
1007 #endif // CC_INTERP