1 /*
2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "interpreter/bytecodeHistogram.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterGenerator.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/templateTable.hpp"
32 #include "oops/arrayOop.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/method.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "prims/jvmtiThreadState.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/deoptimization.hpp"
40 #include "runtime/frame.inline.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/stubRoutines.hpp"
43 #include "runtime/synchronizer.hpp"
44 #include "runtime/timer.hpp"
45 #include "runtime/vframeArray.hpp"
46 #include "utilities/debug.hpp"
47 #include "utilities/macros.hpp"
48
49 #define __ _masm->
50
51 #ifndef CC_INTERP
52
53 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
54 const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize;
55 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
56
57 //-----------------------------------------------------------------------------
58
59 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
60 address entry = __ pc();
61
62 #ifdef ASSERT
63 {
64 Label L;
65 __ lea(rax, Address(rbp,
66 frame::interpreter_frame_monitor_block_top_offset *
67 wordSize));
68 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
69 // grows negative)
70 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
71 __ stop ("interpreter frame not set up");
72 __ bind(L);
73 }
74 #endif // ASSERT
75 // Restore bcp under the assumption that the current frame is still
76 // interpreted
77 __ restore_bcp();
78
79 // expression stack must be empty before entering the VM if an
80 // exception happened
81 __ empty_expression_stack();
82 // throw exception
83 __ call_VM(noreg,
84 CAST_FROM_FN_PTR(address,
85 InterpreterRuntime::throw_StackOverflowError));
86 return entry;
87 }
88
89 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
90 const char* name) {
91 address entry = __ pc();
92 // expression stack must be empty before entering the VM if an
93 // exception happened
94 __ empty_expression_stack();
95 // setup parameters
96 // ??? convention: expect aberrant index in register ebx
97 __ lea(c_rarg1, ExternalAddress((address)name));
98 __ call_VM(noreg,
99 CAST_FROM_FN_PTR(address,
100 InterpreterRuntime::
101 throw_ArrayIndexOutOfBoundsException),
102 c_rarg1, rbx);
103 return entry;
104 }
105
106 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
107 address entry = __ pc();
108
109 // object is at TOS
110 __ pop(c_rarg1);
111
112 // expression stack must be empty before entering the VM if an
113 // exception happened
114 __ empty_expression_stack();
115
116 __ call_VM(noreg,
117 CAST_FROM_FN_PTR(address,
118 InterpreterRuntime::
119 throw_ClassCastException),
120 c_rarg1);
121 return entry;
122 }
123
124 address TemplateInterpreterGenerator::generate_exception_handler_common(
125 const char* name, const char* message, bool pass_oop) {
126 assert(!pass_oop || message == NULL, "either oop or message but not both");
127 address entry = __ pc();
128 if (pass_oop) {
129 // object is at TOS
130 __ pop(c_rarg2);
131 }
132 // expression stack must be empty before entering the VM if an
133 // exception happened
134 __ empty_expression_stack();
135 // setup parameters
136 __ lea(c_rarg1, ExternalAddress((address)name));
137 if (pass_oop) {
138 __ call_VM(rax, CAST_FROM_FN_PTR(address,
139 InterpreterRuntime::
140 create_klass_exception),
141 c_rarg1, c_rarg2);
142 } else {
143 // kind of lame ExternalAddress can't take NULL because
144 // external_word_Relocation will assert.
145 if (message != NULL) {
146 __ lea(c_rarg2, ExternalAddress((address)message));
147 } else {
148 __ movptr(c_rarg2, NULL_WORD);
149 }
150 __ call_VM(rax,
151 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
152 c_rarg1, c_rarg2);
153 }
154 // throw exception
155 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
156 return entry;
157 }
158
159
160 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
161 address entry = __ pc();
162 // NULL last_sp until next java call
163 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
164 __ dispatch_next(state);
165 return entry;
166 }
167
168
169 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
170 address entry = __ pc();
171
172 // Restore stack bottom in case i2c adjusted stack
173 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
174 // and NULL it as marker that esp is now tos until next java call
175 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
176
177 __ restore_bcp();
178 __ restore_locals();
179
180 if (state == atos) {
181 Register mdp = rbx;
182 Register tmp = rcx;
183 __ profile_return_type(mdp, rax, tmp);
184 }
185
186 const Register cache = rbx;
187 const Register index = rcx;
188 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
189
190 const Register flags = cache;
191 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
192 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
193 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
194 __ dispatch_next(state, step);
195
196 return entry;
197 }
198
199
200 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
201 int step) {
202 address entry = __ pc();
203 // NULL last_sp until next java call
204 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
205 __ restore_bcp();
206 __ restore_locals();
207 // handle exceptions
208 {
209 Label L;
210 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
211 __ jcc(Assembler::zero, L);
212 __ call_VM(noreg,
213 CAST_FROM_FN_PTR(address,
214 InterpreterRuntime::throw_pending_exception));
215 __ should_not_reach_here();
216 __ bind(L);
217 }
218 __ dispatch_next(state, step);
219 return entry;
220 }
221
222 int AbstractInterpreter::BasicType_as_index(BasicType type) {
223 int i = 0;
224 switch (type) {
225 case T_BOOLEAN: i = 0; break;
226 case T_CHAR : i = 1; break;
227 case T_BYTE : i = 2; break;
228 case T_SHORT : i = 3; break;
229 case T_INT : i = 4; break;
230 case T_LONG : i = 5; break;
231 case T_VOID : i = 6; break;
232 case T_FLOAT : i = 7; break;
233 case T_DOUBLE : i = 8; break;
234 case T_OBJECT : i = 9; break;
235 case T_ARRAY : i = 9; break;
236 default : ShouldNotReachHere();
237 }
238 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
239 "index out of bounds");
240 return i;
241 }
242
243
244 address TemplateInterpreterGenerator::generate_result_handler_for(
245 BasicType type) {
246 address entry = __ pc();
247 switch (type) {
248 case T_BOOLEAN: __ c2bool(rax); break;
249 case T_CHAR : __ movzwl(rax, rax); break;
250 case T_BYTE : __ sign_extend_byte(rax); break;
251 case T_SHORT : __ sign_extend_short(rax); break;
252 case T_INT : /* nothing to do */ break;
253 case T_LONG : /* nothing to do */ break;
254 case T_VOID : /* nothing to do */ break;
255 case T_FLOAT : /* nothing to do */ break;
256 case T_DOUBLE : /* nothing to do */ break;
257 case T_OBJECT :
258 // retrieve result from frame
259 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
260 // and verify it
261 __ verify_oop(rax);
262 break;
263 default : ShouldNotReachHere();
264 }
265 __ ret(0); // return from result handler
266 return entry;
267 }
268
269 address TemplateInterpreterGenerator::generate_safept_entry_for(
270 TosState state,
271 address runtime_entry) {
272 address entry = __ pc();
273 __ push(state);
274 __ call_VM(noreg, runtime_entry);
275 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
276 return entry;
277 }
278
279
280
281 // Helpers for commoning out cases in the various type of method entries.
282 //
283
284
285 // increment invocation count & check for overflow
286 //
287 // Note: checking for negative value instead of overflow
288 // so we have a 'sticky' overflow test
289 //
290 // rbx: method
291 // ecx: invocation counter
292 //
293 void InterpreterGenerator::generate_counter_incr(
294 Label* overflow,
295 Label* profile_method,
296 Label* profile_method_continue) {
297 Label done;
298 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
299 if (TieredCompilation) {
300 int increment = InvocationCounter::count_increment;
301 int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift;
302 Label no_mdo;
303 if (ProfileInterpreter) {
304 // Are we profiling?
305 __ movptr(rax, Address(rbx, Method::method_data_offset()));
306 __ testptr(rax, rax);
307 __ jccb(Assembler::zero, no_mdo);
308 // Increment counter in the MDO
309 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
310 in_bytes(InvocationCounter::counter_offset()));
311 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
312 __ jmp(done);
313 }
314 __ bind(no_mdo);
315 // Increment counter in MethodCounters
316 const Address invocation_counter(rax,
317 MethodCounters::invocation_counter_offset() +
318 InvocationCounter::counter_offset());
319 __ get_method_counters(rbx, rax, done);
320 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
321 false, Assembler::zero, overflow);
322 __ bind(done);
323 } else {
324 const Address backedge_counter(rax,
325 MethodCounters::backedge_counter_offset() +
326 InvocationCounter::counter_offset());
327 const Address invocation_counter(rax,
328 MethodCounters::invocation_counter_offset() +
329 InvocationCounter::counter_offset());
330
331 __ get_method_counters(rbx, rax, done);
332
333 if (ProfileInterpreter) {
334 __ incrementl(Address(rax,
335 MethodCounters::interpreter_invocation_counter_offset()));
336 }
337 // Update standard invocation counters
338 __ movl(rcx, invocation_counter);
339 __ incrementl(rcx, InvocationCounter::count_increment);
340 __ movl(invocation_counter, rcx); // save invocation count
341
342 __ movl(rax, backedge_counter); // load backedge counter
343 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
344
345 __ addl(rcx, rax); // add both counters
346
347 // profile_method is non-null only for interpreted method so
348 // profile_method != NULL == !native_call
349
350 if (ProfileInterpreter && profile_method != NULL) {
351 // Test to see if we should create a method data oop
352 __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));
353 __ jcc(Assembler::less, *profile_method_continue);
354
355 // if no method data exists, go to profile_method
356 __ test_method_data_pointer(rax, *profile_method);
357 }
358
359 __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));
360 __ jcc(Assembler::aboveEqual, *overflow);
361 __ bind(done);
362 }
363 }
364
365 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
366
367 // Asm interpreter on entry
368 // r14 - locals
369 // r13 - bcp
370 // rbx - method
371 // edx - cpool --- DOES NOT APPEAR TO BE TRUE
372 // rbp - interpreter frame
373
374 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
375 // Everything as it was on entry
376 // rdx is not restored. Doesn't appear to really be set.
377
378 // InterpreterRuntime::frequency_counter_overflow takes two
379 // arguments, the first (thread) is passed by call_VM, the second
380 // indicates if the counter overflow occurs at a backwards branch
381 // (NULL bcp). We pass zero for it. The call returns the address
382 // of the verified entry point for the method or NULL if the
383 // compilation did not complete (either went background or bailed
384 // out).
385 __ movl(c_rarg1, 0);
386 __ call_VM(noreg,
387 CAST_FROM_FN_PTR(address,
388 InterpreterRuntime::frequency_counter_overflow),
389 c_rarg1);
390
391 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
392 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
393 // and jump to the interpreted entry.
394 __ jmp(*do_continue, relocInfo::none);
395 }
396
397 // See if we've got enough room on the stack for locals plus overhead.
398 // The expression stack grows down incrementally, so the normal guard
399 // page mechanism will work for that.
400 //
401 // NOTE: Since the additional locals are also always pushed (wasn't
402 // obvious in generate_method_entry) so the guard should work for them
403 // too.
404 //
405 // Args:
406 // rdx: number of additional locals this frame needs (what we must check)
407 // rbx: Method*
408 //
409 // Kills:
410 // rax
411 void InterpreterGenerator::generate_stack_overflow_check(void) {
412
413 // monitor entry size: see picture of stack set
414 // (generate_method_entry) and frame_amd64.hpp
415 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
416
417 // total overhead size: entry_size + (saved rbp through expr stack
418 // bottom). be sure to change this if you add/subtract anything
419 // to/from the overhead area
420 const int overhead_size =
421 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
422
423 const int page_size = os::vm_page_size();
424
425 Label after_frame_check;
426
427 // see if the frame is greater than one page in size. If so,
428 // then we need to verify there is enough stack space remaining
429 // for the additional locals.
430 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
431 __ jcc(Assembler::belowEqual, after_frame_check);
432
433 // compute rsp as if this were going to be the last frame on
434 // the stack before the red zone
435
436 const Address stack_base(r15_thread, Thread::stack_base_offset());
437 const Address stack_size(r15_thread, Thread::stack_size_offset());
438
439 // locals + overhead, in bytes
440 __ mov(rax, rdx);
441 __ shlptr(rax, Interpreter::logStackElementSize); // 2 slots per parameter.
442 __ addptr(rax, overhead_size);
443
444 #ifdef ASSERT
445 Label stack_base_okay, stack_size_okay;
446 // verify that thread stack base is non-zero
447 __ cmpptr(stack_base, (int32_t)NULL_WORD);
448 __ jcc(Assembler::notEqual, stack_base_okay);
449 __ stop("stack base is zero");
450 __ bind(stack_base_okay);
451 // verify that thread stack size is non-zero
452 __ cmpptr(stack_size, 0);
453 __ jcc(Assembler::notEqual, stack_size_okay);
454 __ stop("stack size is zero");
455 __ bind(stack_size_okay);
456 #endif
457
458 // Add stack base to locals and subtract stack size
459 __ addptr(rax, stack_base);
460 __ subptr(rax, stack_size);
461
462 // Use the maximum number of pages we might bang.
463 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
464 (StackRedPages+StackYellowPages);
465
466 // add in the red and yellow zone sizes
467 __ addptr(rax, max_pages * page_size);
468
469 // check against the current stack bottom
470 __ cmpptr(rsp, rax);
471 __ jcc(Assembler::above, after_frame_check);
472
473 // Restore sender's sp as SP. This is necessary if the sender's
474 // frame is an extended compiled frame (see gen_c2i_adapter())
475 // and safer anyway in case of JSR292 adaptations.
476
477 __ pop(rax); // return address must be moved if SP is changed
478 __ mov(rsp, r13);
479 __ push(rax);
480
481 // Note: the restored frame is not necessarily interpreted.
482 // Use the shared runtime version of the StackOverflowError.
483 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
484 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
485
486 // all done with frame size check
487 __ bind(after_frame_check);
488 }
489
490 // Allocate monitor and lock method (asm interpreter)
491 //
492 // Args:
493 // rbx: Method*
494 // r14: locals
495 //
496 // Kills:
497 // rax
498 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
499 // rscratch1, rscratch2 (scratch regs)
500 void InterpreterGenerator::lock_method(void) {
501 // synchronize method
502 const Address access_flags(rbx, Method::access_flags_offset());
503 const Address monitor_block_top(
504 rbp,
505 frame::interpreter_frame_monitor_block_top_offset * wordSize);
506 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
507
508 #ifdef ASSERT
509 {
510 Label L;
511 __ movl(rax, access_flags);
512 __ testl(rax, JVM_ACC_SYNCHRONIZED);
513 __ jcc(Assembler::notZero, L);
514 __ stop("method doesn't need synchronization");
515 __ bind(L);
516 }
517 #endif // ASSERT
518
519 // get synchronization object
520 {
521 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
522 Label done;
523 __ movl(rax, access_flags);
524 __ testl(rax, JVM_ACC_STATIC);
525 // get receiver (assume this is frequent case)
526 __ movptr(rax, Address(r14, Interpreter::local_offset_in_bytes(0)));
527 __ jcc(Assembler::zero, done);
528 __ movptr(rax, Address(rbx, Method::const_offset()));
529 __ movptr(rax, Address(rax, ConstMethod::constants_offset()));
530 __ movptr(rax, Address(rax,
531 ConstantPool::pool_holder_offset_in_bytes()));
532 __ movptr(rax, Address(rax, mirror_offset));
533
534 #ifdef ASSERT
535 {
536 Label L;
537 __ testptr(rax, rax);
538 __ jcc(Assembler::notZero, L);
539 __ stop("synchronization object is NULL");
540 __ bind(L);
541 }
542 #endif // ASSERT
543
544 __ bind(done);
545 }
546
547 // add space for monitor & lock
548 __ subptr(rsp, entry_size); // add space for a monitor entry
549 __ movptr(monitor_block_top, rsp); // set new monitor block top
550 // store object
551 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
552 __ movptr(c_rarg1, rsp); // object address
553 __ lock_object(c_rarg1);
554 }
555
556 // Generate a fixed interpreter frame. This is identical setup for
557 // interpreted methods and for native methods hence the shared code.
558 //
559 // Args:
560 // rax: return address
561 // rbx: Method*
562 // r14: pointer to locals
563 // r13: sender sp
564 // rdx: cp cache
565 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
566 // initialize fixed part of activation frame
567 __ push(rax); // save return address
568 __ enter(); // save old & set new rbp
569 __ push(r13); // set sender sp
570 __ push((int)NULL_WORD); // leave last_sp as null
571 __ movptr(r13, Address(rbx, Method::const_offset())); // get ConstMethod*
572 __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase
573 __ push(rbx); // save Method*
574 if (ProfileInterpreter) {
575 Label method_data_continue;
576 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
577 __ testptr(rdx, rdx);
578 __ jcc(Assembler::zero, method_data_continue);
579 __ addptr(rdx, in_bytes(MethodData::data_offset()));
580 __ bind(method_data_continue);
581 __ push(rdx); // set the mdp (method data pointer)
582 } else {
583 __ push(0);
584 }
585
586 __ movptr(rdx, Address(rbx, Method::const_offset()));
587 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
588 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
589 __ push(rdx); // set constant pool cache
590 __ push(r14); // set locals pointer
591 if (native_call) {
592 __ push(0); // no bcp
593 } else {
594 __ push(r13); // set bcp
595 }
596 __ push(0); // reserve word for pointer to expression stack bottom
597 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
598 }
599
600 // End of helpers
601
602 // Various method entries
603 //------------------------------------------------------------------------------------------------------------------------
604 //
605 //
606
607 // Call an accessor method (assuming it is resolved, otherwise drop
608 // into vanilla (slow path) entry
609 address InterpreterGenerator::generate_accessor_entry(void) {
610 // rbx: Method*
611
612 // r13: senderSP must preserver for slow path, set SP to it on fast path
613
614 address entry_point = __ pc();
615 Label xreturn_path;
616
617 // do fastpath for resolved accessor methods
618 if (UseFastAccessorMethods) {
619 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites
620 // thereof; parameter size = 1
621 // Note: We can only use this code if the getfield has been resolved
622 // and if we don't have a null-pointer exception => check for
623 // these conditions first and use slow path if necessary.
624 Label slow_path;
625 // If we need a safepoint check, generate full interpreter entry.
626 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
627 SafepointSynchronize::_not_synchronized);
628
629 __ jcc(Assembler::notEqual, slow_path);
630 // rbx: method
631 __ movptr(rax, Address(rsp, wordSize));
632
633 // check if local 0 != NULL and read field
634 __ testptr(rax, rax);
635 __ jcc(Assembler::zero, slow_path);
636
637 // read first instruction word and extract bytecode @ 1 and index @ 2
638 __ movptr(rdx, Address(rbx, Method::const_offset()));
639 __ movptr(rdi, Address(rdx, ConstMethod::constants_offset()));
640 __ movl(rdx, Address(rdx, ConstMethod::codes_offset()));
641 // Shift codes right to get the index on the right.
642 // The bytecode fetched looks like <index><0xb4><0x2a>
643 __ shrl(rdx, 2 * BitsPerByte);
644 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
645 __ movptr(rdi, Address(rdi, ConstantPool::cache_offset_in_bytes()));
646
647 // rax: local 0
648 // rbx: method
649 // rdx: constant pool cache index
650 // rdi: constant pool cache
651
652 // check if getfield has been resolved and read constant pool cache entry
653 // check the validity of the cache entry by testing whether _indices field
654 // contains Bytecode::_getfield in b1 byte.
655 assert(in_words(ConstantPoolCacheEntry::size()) == 4,
656 "adjust shift below");
657 __ movl(rcx,
658 Address(rdi,
659 rdx,
660 Address::times_8,
661 ConstantPoolCache::base_offset() +
662 ConstantPoolCacheEntry::indices_offset()));
663 __ shrl(rcx, 2 * BitsPerByte);
664 __ andl(rcx, 0xFF);
665 __ cmpl(rcx, Bytecodes::_getfield);
666 __ jcc(Assembler::notEqual, slow_path);
667
668 // Note: constant pool entry is not valid before bytecode is resolved
669 __ movptr(rcx,
670 Address(rdi,
671 rdx,
672 Address::times_8,
673 ConstantPoolCache::base_offset() +
674 ConstantPoolCacheEntry::f2_offset()));
675 // edx: flags
676 __ movl(rdx,
677 Address(rdi,
678 rdx,
679 Address::times_8,
680 ConstantPoolCache::base_offset() +
681 ConstantPoolCacheEntry::flags_offset()));
682
683 Label notObj, notInt, notByte, notBool, notShort;
684 const Address field_address(rax, rcx, Address::times_1);
685
686 // Need to differentiate between igetfield, agetfield, bgetfield etc.
687 // because they are different sizes.
688 // Use the type from the constant pool cache
689 __ shrl(rdx, ConstantPoolCacheEntry::tos_state_shift);
690 // Make sure we don't need to mask edx after the above shift
691 ConstantPoolCacheEntry::verify_tos_state_shift();
692
693 __ cmpl(rdx, atos);
694 __ jcc(Assembler::notEqual, notObj);
695 // atos
696 __ load_heap_oop(rax, field_address);
697 __ jmp(xreturn_path);
698
699 __ bind(notObj);
700 __ cmpl(rdx, itos);
701 __ jcc(Assembler::notEqual, notInt);
702 // itos
703 __ movl(rax, field_address);
704 __ jmp(xreturn_path);
705
706 __ bind(notInt);
707 __ cmpl(rdx, btos);
708 __ jcc(Assembler::notEqual, notByte);
709 // btos
710 __ load_signed_byte(rax, field_address);
711 __ jmp(xreturn_path);
712
713 __ bind(notByte);
714 __ cmpl(rdx, ztos);
715 __ jcc(Assembler::notEqual, notBool);
716 // ztos
717 __ load_signed_byte(rax, field_address);
718 __ jmp(xreturn_path);
719
720 __ bind(notBool);
721 __ cmpl(rdx, stos);
722 __ jcc(Assembler::notEqual, notShort);
723 // stos
724 __ load_signed_short(rax, field_address);
725 __ jmp(xreturn_path);
726
727 __ bind(notShort);
728 #ifdef ASSERT
729 Label okay;
730 __ cmpl(rdx, ctos);
731 __ jcc(Assembler::equal, okay);
732 __ stop("what type is this?");
733 __ bind(okay);
734 #endif
735 // ctos
736 __ load_unsigned_short(rax, field_address);
737
738 __ bind(xreturn_path);
739
740 // _ireturn/_areturn
741 __ pop(rdi);
742 __ mov(rsp, r13);
743 __ jmp(rdi);
744 __ ret(0);
745
746 // generate a vanilla interpreter entry as the slow path
747 __ bind(slow_path);
748 (void) generate_normal_entry(false);
749 } else {
750 (void) generate_normal_entry(false);
751 }
752
753 return entry_point;
754 }
755
756 // Method entry for java.lang.ref.Reference.get.
757 address InterpreterGenerator::generate_Reference_get_entry(void) {
758 #if INCLUDE_ALL_GCS
759 // Code: _aload_0, _getfield, _areturn
760 // parameter size = 1
761 //
762 // The code that gets generated by this routine is split into 2 parts:
763 // 1. The "intrinsified" code for G1 (or any SATB based GC),
764 // 2. The slow path - which is an expansion of the regular method entry.
765 //
766 // Notes:-
767 // * In the G1 code we do not check whether we need to block for
768 // a safepoint. If G1 is enabled then we must execute the specialized
769 // code for Reference.get (except when the Reference object is null)
770 // so that we can log the value in the referent field with an SATB
771 // update buffer.
772 // If the code for the getfield template is modified so that the
773 // G1 pre-barrier code is executed when the current method is
774 // Reference.get() then going through the normal method entry
775 // will be fine.
776 // * The G1 code can, however, check the receiver object (the instance
777 // of java.lang.Reference) and jump to the slow path if null. If the
778 // Reference object is null then we obviously cannot fetch the referent
779 // and so we don't need to call the G1 pre-barrier. Thus we can use the
780 // regular method entry code to generate the NPE.
781 //
782 // This code is based on generate_accessor_enty.
783 //
784 // rbx: Method*
785
786 // r13: senderSP must preserve for slow path, set SP to it on fast path
787
788 address entry = __ pc();
789
790 const int referent_offset = java_lang_ref_Reference::referent_offset;
791 guarantee(referent_offset > 0, "referent offset not initialized");
792
793 if (UseG1GC || UseShenandoahGC) {
794 Label slow_path;
795 // rbx: method
796
797 // Check if local 0 != NULL
798 // If the receiver is null then it is OK to jump to the slow path.
799 __ movptr(rax, Address(rsp, wordSize));
800
801 __ testptr(rax, rax);
802 __ jcc(Assembler::zero, slow_path);
803
804 // rax: local 0
805 // rbx: method (but can be used as scratch now)
806 // rdx: scratch
807 // rdi: scratch
808
809 // Generate the G1 pre-barrier code to log the value of
810 // the referent field in an SATB buffer.
811
812 // Load the value of the referent field.
813 const Address field_address(rax, referent_offset);
814 __ load_heap_oop(rax, field_address);
815
816 // Generate the G1 pre-barrier code to log the value of
817 // the referent field in an SATB buffer.
818 __ g1_write_barrier_pre(noreg /* obj */,
819 rax /* pre_val */,
820 r15_thread /* thread */,
821 rbx /* tmp */,
822 true /* tosca_live */,
823 true /* expand_call */);
824
825 // _areturn
826 __ pop(rdi); // get return address
827 __ mov(rsp, r13); // set sp to sender sp
828 __ jmp(rdi);
829 __ ret(0);
830
831 // generate a vanilla interpreter entry as the slow path
832 __ bind(slow_path);
833 (void) generate_normal_entry(false);
834
835 return entry;
836 }
837 #endif // INCLUDE_ALL_GCS
838
839 // If G1 is not enabled then attempt to go through the accessor entry point
840 // Reference.get is an accessor
841 return generate_accessor_entry();
842 }
843
844 /**
845 * Method entry for static native methods:
846 * int java.util.zip.CRC32.update(int crc, int b)
847 */
848 address InterpreterGenerator::generate_CRC32_update_entry() {
849 if (UseCRC32Intrinsics) {
850 address entry = __ pc();
851
852 // rbx,: Method*
853 // r13: senderSP must preserved for slow path, set SP to it on fast path
854 // c_rarg0: scratch (rdi on non-Win64, rcx on Win64)
855 // c_rarg1: scratch (rsi on non-Win64, rdx on Win64)
856
857 Label slow_path;
858 // If we need a safepoint check, generate full interpreter entry.
859 ExternalAddress state(SafepointSynchronize::address_of_state());
860 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
861 SafepointSynchronize::_not_synchronized);
862 __ jcc(Assembler::notEqual, slow_path);
863
864 // We don't generate local frame and don't align stack because
865 // we call stub code and there is no safepoint on this path.
866
867 // Load parameters
868 const Register crc = rax; // crc
869 const Register val = c_rarg0; // source java byte value
870 const Register tbl = c_rarg1; // scratch
871
872 // Arguments are reversed on java expression stack
873 __ movl(val, Address(rsp, wordSize)); // byte value
874 __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC
875
876 __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr()));
877 __ notl(crc); // ~crc
878 __ update_byte_crc32(crc, val, tbl);
879 __ notl(crc); // ~crc
880 // result in rax
881
882 // _areturn
883 __ pop(rdi); // get return address
884 __ mov(rsp, r13); // set sp to sender sp
885 __ jmp(rdi);
886
887 // generate a vanilla native entry as the slow path
888 __ bind(slow_path);
889
890 (void) generate_native_entry(false);
891
892 return entry;
893 }
894 return generate_native_entry(false);
895 }
896
897 /**
898 * Method entry for static native methods:
899 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
900 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
901 */
902 address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
903 if (UseCRC32Intrinsics) {
904 address entry = __ pc();
905
906 // rbx,: Method*
907 // r13: senderSP must preserved for slow path, set SP to it on fast path
908
909 Label slow_path;
910 // If we need a safepoint check, generate full interpreter entry.
911 ExternalAddress state(SafepointSynchronize::address_of_state());
912 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
913 SafepointSynchronize::_not_synchronized);
914 __ jcc(Assembler::notEqual, slow_path);
915
916 // We don't generate local frame and don't align stack because
917 // we call stub code and there is no safepoint on this path.
918
919 // Load parameters
920 const Register crc = c_rarg0; // crc
921 const Register buf = c_rarg1; // source java byte array address
922 const Register len = c_rarg2; // length
923 const Register off = len; // offset (never overlaps with 'len')
924
925 // Arguments are reversed on java expression stack
926 // Calculate address of start element
927 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
928 __ movptr(buf, Address(rsp, 3*wordSize)); // long buf
929 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
930 __ addq(buf, off); // + offset
931 __ movl(crc, Address(rsp, 5*wordSize)); // Initial CRC
932 } else {
933 __ movptr(buf, Address(rsp, 3*wordSize)); // byte[] array
934 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
935 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
936 __ addq(buf, off); // + offset
937 __ movl(crc, Address(rsp, 4*wordSize)); // Initial CRC
938 }
939 // Can now load 'len' since we're finished with 'off'
940 __ movl(len, Address(rsp, wordSize)); // Length
941
942 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len);
943 // result in rax
944
945 // _areturn
946 __ pop(rdi); // get return address
947 __ mov(rsp, r13); // set sp to sender sp
948 __ jmp(rdi);
949
950 // generate a vanilla native entry as the slow path
951 __ bind(slow_path);
952
953 (void) generate_native_entry(false);
954
955 return entry;
956 }
957 return generate_native_entry(false);
958 }
959
960 // Interpreter stub for calling a native method. (asm interpreter)
961 // This sets up a somewhat different looking stack for calling the
962 // native method than the typical interpreter frame setup.
963 address InterpreterGenerator::generate_native_entry(bool synchronized) {
964 // determine code generation flags
965 bool inc_counter = UseCompiler || CountCompiledCalls;
966
967 // rbx: Method*
968 // r13: sender sp
969
970 address entry_point = __ pc();
971
972 const Address constMethod (rbx, Method::const_offset());
973 const Address access_flags (rbx, Method::access_flags_offset());
974 const Address size_of_parameters(rcx, ConstMethod::
975 size_of_parameters_offset());
976
977
978 // get parameter size (always needed)
979 __ movptr(rcx, constMethod);
980 __ load_unsigned_short(rcx, size_of_parameters);
981
982 // native calls don't need the stack size check since they have no
983 // expression stack and the arguments are already on the stack and
984 // we only add a handful of words to the stack
985
986 // rbx: Method*
987 // rcx: size of parameters
988 // r13: sender sp
989 __ pop(rax); // get return address
990
991 // for natives the size of locals is zero
992
993 // compute beginning of parameters (r14)
994 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
995
996 // add 2 zero-initialized slots for native calls
997 // initialize result_handler slot
998 __ push((int) NULL_WORD);
999 // slot for oop temp
1000 // (static native method holder mirror/jni oop result)
1001 __ push((int) NULL_WORD);
1002
1003 // initialize fixed part of activation frame
1004 generate_fixed_frame(true);
1005
1006 // make sure method is native & not abstract
1007 #ifdef ASSERT
1008 __ movl(rax, access_flags);
1009 {
1010 Label L;
1011 __ testl(rax, JVM_ACC_NATIVE);
1012 __ jcc(Assembler::notZero, L);
1013 __ stop("tried to execute non-native method as native");
1014 __ bind(L);
1015 }
1016 {
1017 Label L;
1018 __ testl(rax, JVM_ACC_ABSTRACT);
1019 __ jcc(Assembler::zero, L);
1020 __ stop("tried to execute abstract method in interpreter");
1021 __ bind(L);
1022 }
1023 #endif
1024
1025 // Since at this point in the method invocation the exception handler
1026 // would try to exit the monitor of synchronized methods which hasn't
1027 // been entered yet, we set the thread local variable
1028 // _do_not_unlock_if_synchronized to true. The remove_activation will
1029 // check this flag.
1030
1031 const Address do_not_unlock_if_synchronized(r15_thread,
1032 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1033 __ movbool(do_not_unlock_if_synchronized, true);
1034
1035 // increment invocation count & check for overflow
1036 Label invocation_counter_overflow;
1037 if (inc_counter) {
1038 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1039 }
1040
1041 Label continue_after_compile;
1042 __ bind(continue_after_compile);
1043
1044 bang_stack_shadow_pages(true);
1045
1046 // reset the _do_not_unlock_if_synchronized flag
1047 __ movbool(do_not_unlock_if_synchronized, false);
1048
1049 // check for synchronized methods
1050 // Must happen AFTER invocation_counter check and stack overflow check,
1051 // so method is not locked if overflows.
1052 if (synchronized) {
1053 lock_method();
1054 } else {
1055 // no synchronization necessary
1056 #ifdef ASSERT
1057 {
1058 Label L;
1059 __ movl(rax, access_flags);
1060 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1061 __ jcc(Assembler::zero, L);
1062 __ stop("method needs synchronization");
1063 __ bind(L);
1064 }
1065 #endif
1066 }
1067
1068 // start execution
1069 #ifdef ASSERT
1070 {
1071 Label L;
1072 const Address monitor_block_top(rbp,
1073 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1074 __ movptr(rax, monitor_block_top);
1075 __ cmpptr(rax, rsp);
1076 __ jcc(Assembler::equal, L);
1077 __ stop("broken stack frame setup in interpreter");
1078 __ bind(L);
1079 }
1080 #endif
1081
1082 // jvmti support
1083 __ notify_method_entry();
1084
1085 // work registers
1086 const Register method = rbx;
1087 const Register t = r11;
1088
1089 // allocate space for parameters
1090 __ get_method(method);
1091 __ movptr(t, Address(method, Method::const_offset()));
1092 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1093 __ shll(t, Interpreter::logStackElementSize);
1094
1095 __ subptr(rsp, t);
1096 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1097 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
1098
1099 // get signature handler
1100 {
1101 Label L;
1102 __ movptr(t, Address(method, Method::signature_handler_offset()));
1103 __ testptr(t, t);
1104 __ jcc(Assembler::notZero, L);
1105 __ call_VM(noreg,
1106 CAST_FROM_FN_PTR(address,
1107 InterpreterRuntime::prepare_native_call),
1108 method);
1109 __ get_method(method);
1110 __ movptr(t, Address(method, Method::signature_handler_offset()));
1111 __ bind(L);
1112 }
1113
1114 // call signature handler
1115 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == r14,
1116 "adjust this code");
1117 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
1118 "adjust this code");
1119 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
1120 "adjust this code");
1121
1122 // The generated handlers do not touch RBX (the method oop).
1123 // However, large signatures cannot be cached and are generated
1124 // each time here. The slow-path generator can do a GC on return,
1125 // so we must reload it after the call.
1126 __ call(t);
1127 __ get_method(method); // slow path can do a GC, reload RBX
1128
1129
1130 // result handler is in rax
1131 // set result handler
1132 __ movptr(Address(rbp,
1133 (frame::interpreter_frame_result_handler_offset) * wordSize),
1134 rax);
1135
1136 // pass mirror handle if static call
1137 {
1138 Label L;
1139 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
1140 __ movl(t, Address(method, Method::access_flags_offset()));
1141 __ testl(t, JVM_ACC_STATIC);
1142 __ jcc(Assembler::zero, L);
1143 // get mirror
1144 __ movptr(t, Address(method, Method::const_offset()));
1145 __ movptr(t, Address(t, ConstMethod::constants_offset()));
1146 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
1147 __ movptr(t, Address(t, mirror_offset));
1148 // copy mirror into activation frame
1149 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
1150 t);
1151 // pass handle to mirror
1152 __ lea(c_rarg1,
1153 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1154 __ bind(L);
1155 }
1156
1157 // get native function entry point
1158 {
1159 Label L;
1160 __ movptr(rax, Address(method, Method::native_function_offset()));
1161 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1162 __ movptr(rscratch2, unsatisfied.addr());
1163 __ cmpptr(rax, rscratch2);
1164 __ jcc(Assembler::notEqual, L);
1165 __ call_VM(noreg,
1166 CAST_FROM_FN_PTR(address,
1167 InterpreterRuntime::prepare_native_call),
1168 method);
1169 __ get_method(method);
1170 __ movptr(rax, Address(method, Method::native_function_offset()));
1171 __ bind(L);
1172 }
1173
1174 // pass JNIEnv
1175 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1176
1177 // It is enough that the pc() points into the right code
1178 // segment. It does not have to be the correct return pc.
1179 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1180
1181 // change thread state
1182 #ifdef ASSERT
1183 {
1184 Label L;
1185 __ movl(t, Address(r15_thread, JavaThread::thread_state_offset()));
1186 __ cmpl(t, _thread_in_Java);
1187 __ jcc(Assembler::equal, L);
1188 __ stop("Wrong thread state in native stub");
1189 __ bind(L);
1190 }
1191 #endif
1192
1193 // Change state to native
1194
1195 __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
1196 _thread_in_native);
1197
1198 // Call the native method.
1199 __ call(rax);
1200 // result potentially in rax or xmm0
1201
1202 // Verify or restore cpu control state after JNI call
1203 __ restore_cpu_control_state_after_jni();
1204
1205 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1206 // in order to extract the result of a method call. If the order of these
1207 // pushes change or anything else is added to the stack then the code in
1208 // interpreter_frame_result must also change.
1209
1210 __ push(dtos);
1211 __ push(ltos);
1212
1213 // change thread state
1214 __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
1215 _thread_in_native_trans);
1216
1217 if (os::is_MP()) {
1218 if (UseMembar) {
1219 // Force this write out before the read below
1220 __ membar(Assembler::Membar_mask_bits(
1221 Assembler::LoadLoad | Assembler::LoadStore |
1222 Assembler::StoreLoad | Assembler::StoreStore));
1223 } else {
1224 // Write serialization page so VM thread can do a pseudo remote membar.
1225 // We use the current thread pointer to calculate a thread specific
1226 // offset to write to within the page. This minimizes bus traffic
1227 // due to cache line collision.
1228 __ serialize_memory(r15_thread, rscratch2);
1229 }
1230 }
1231
1232 // check for safepoint operation in progress and/or pending suspend requests
1233 {
1234 Label Continue;
1235 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1236 SafepointSynchronize::_not_synchronized);
1237
1238 Label L;
1239 __ jcc(Assembler::notEqual, L);
1240 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0);
1241 __ jcc(Assembler::equal, Continue);
1242 __ bind(L);
1243
1244 // Don't use call_VM as it will see a possible pending exception
1245 // and forward it and never return here preventing us from
1246 // clearing _last_native_pc down below. Also can't use
1247 // call_VM_leaf either as it will check to see if r13 & r14 are
1248 // preserved and correspond to the bcp/locals pointers. So we do a
1249 // runtime call by hand.
1250 //
1251 __ mov(c_rarg0, r15_thread);
1252 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1253 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1254 __ andptr(rsp, -16); // align stack as required by ABI
1255 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1256 __ mov(rsp, r12); // restore sp
1257 __ reinit_heapbase();
1258 __ bind(Continue);
1259 }
1260
1261 // change thread state
1262 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java);
1263
1264 // reset_last_Java_frame
1265 __ reset_last_Java_frame(r15_thread, true);
1266
1267 // reset handle block
1268 __ movptr(t, Address(r15_thread, JavaThread::active_handles_offset()));
1269 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1270
1271 // If result is an oop unbox and store it in frame where gc will see it
1272 // and result handler will pick it up
1273
1274 {
1275 Label no_oop;
1276 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1277 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1278 __ jcc(Assembler::notEqual, no_oop);
1279 // retrieve result
1280 __ pop(ltos);
1281 // Unbox oop result, e.g. JNIHandles::resolve value.
1282 __ resolve_jobject(rax /* value */,
1283 r15_thread /* thread */,
1284 t /* tmp */);
1285 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1286 // keep stack depth as expected by pushing oop which will eventually be discarde
1287 __ push(ltos);
1288 __ bind(no_oop);
1289 }
1290
1291
1292 {
1293 Label no_reguard;
1294 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()),
1295 JavaThread::stack_guard_yellow_disabled);
1296 __ jcc(Assembler::notEqual, no_reguard);
1297
1298 __ pusha(); // XXX only save smashed registers
1299 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1300 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1301 __ andptr(rsp, -16); // align stack as required by ABI
1302 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1303 __ mov(rsp, r12); // restore sp
1304 __ popa(); // XXX only restore smashed registers
1305 __ reinit_heapbase();
1306
1307 __ bind(no_reguard);
1308 }
1309
1310
1311 // The method register is junk from after the thread_in_native transition
1312 // until here. Also can't call_VM until the bcp has been
1313 // restored. Need bcp for throwing exception below so get it now.
1314 __ get_method(method);
1315
1316 // restore r13 to have legal interpreter frame, i.e., bci == 0 <=>
1317 // r13 == code_base()
1318 __ movptr(r13, Address(method, Method::const_offset())); // get ConstMethod*
1319 __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase
1320 // handle exceptions (exception handling will handle unlocking!)
1321 {
1322 Label L;
1323 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1324 __ jcc(Assembler::zero, L);
1325 // Note: At some point we may want to unify this with the code
1326 // used in call_VM_base(); i.e., we should use the
1327 // StubRoutines::forward_exception code. For now this doesn't work
1328 // here because the rsp is not correctly set at this point.
1329 __ MacroAssembler::call_VM(noreg,
1330 CAST_FROM_FN_PTR(address,
1331 InterpreterRuntime::throw_pending_exception));
1332 __ should_not_reach_here();
1333 __ bind(L);
1334 }
1335
1336 // do unlocking if necessary
1337 {
1338 Label L;
1339 __ movl(t, Address(method, Method::access_flags_offset()));
1340 __ testl(t, JVM_ACC_SYNCHRONIZED);
1341 __ jcc(Assembler::zero, L);
1342 // the code below should be shared with interpreter macro
1343 // assembler implementation
1344 {
1345 Label unlock;
1346 // BasicObjectLock will be first in list, since this is a
1347 // synchronized method. However, need to check that the object
1348 // has not been unlocked by an explicit monitorexit bytecode.
1349 const Address monitor(rbp,
1350 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1351 wordSize - sizeof(BasicObjectLock)));
1352
1353 // monitor expect in c_rarg1 for slow unlock path
1354 __ lea(c_rarg1, monitor); // address of first monitor
1355
1356 __ movptr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
1357 __ testptr(t, t);
1358 __ jcc(Assembler::notZero, unlock);
1359
1360 // Entry already unlocked, need to throw exception
1361 __ MacroAssembler::call_VM(noreg,
1362 CAST_FROM_FN_PTR(address,
1363 InterpreterRuntime::throw_illegal_monitor_state_exception));
1364 __ should_not_reach_here();
1365
1366 __ bind(unlock);
1367 __ unlock_object(c_rarg1);
1368 }
1369 __ bind(L);
1370 }
1371
1372 // jvmti support
1373 // Note: This must happen _after_ handling/throwing any exceptions since
1374 // the exception handler code notifies the runtime of method exits
1375 // too. If this happens before, method entry/exit notifications are
1376 // not properly paired (was bug - gri 11/22/99).
1377 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1378
1379 // restore potential result in edx:eax, call result handler to
1380 // restore potential result in ST0 & handle result
1381
1382 __ pop(ltos);
1383 __ pop(dtos);
1384
1385 __ movptr(t, Address(rbp,
1386 (frame::interpreter_frame_result_handler_offset) * wordSize));
1387 __ call(t);
1388
1389 // remove activation
1390 __ movptr(t, Address(rbp,
1391 frame::interpreter_frame_sender_sp_offset *
1392 wordSize)); // get sender sp
1393 __ leave(); // remove frame anchor
1394 __ pop(rdi); // get return address
1395 __ mov(rsp, t); // set sp to sender sp
1396 __ jmp(rdi);
1397
1398 if (inc_counter) {
1399 // Handle overflow of counter and compile method
1400 __ bind(invocation_counter_overflow);
1401 generate_counter_overflow(&continue_after_compile);
1402 }
1403
1404 return entry_point;
1405 }
1406
1407 //
1408 // Generic interpreted method entry to (asm) interpreter
1409 //
1410 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1411 // determine code generation flags
1412 bool inc_counter = UseCompiler || CountCompiledCalls;
1413
1414 // ebx: Method*
1415 // r13: sender sp
1416 address entry_point = __ pc();
1417
1418 const Address constMethod(rbx, Method::const_offset());
1419 const Address access_flags(rbx, Method::access_flags_offset());
1420 const Address size_of_parameters(rdx,
1421 ConstMethod::size_of_parameters_offset());
1422 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1423
1424
1425 // get parameter size (always needed)
1426 __ movptr(rdx, constMethod);
1427 __ load_unsigned_short(rcx, size_of_parameters);
1428
1429 // rbx: Method*
1430 // rcx: size of parameters
1431 // r13: sender_sp (could differ from sp+wordSize if we were called via c2i )
1432
1433 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1434 __ subl(rdx, rcx); // rdx = no. of additional locals
1435
1436 // YYY
1437 // __ incrementl(rdx);
1438 // __ andl(rdx, -2);
1439
1440 // see if we've got enough room on the stack for locals plus overhead.
1441 generate_stack_overflow_check();
1442
1443 // get return address
1444 __ pop(rax);
1445
1446 // compute beginning of parameters (r14)
1447 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
1448
1449 // rdx - # of additional locals
1450 // allocate space for locals
1451 // explicitly initialize locals
1452 {
1453 Label exit, loop;
1454 __ testl(rdx, rdx);
1455 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1456 __ bind(loop);
1457 __ push((int) NULL_WORD); // initialize local variables
1458 __ decrementl(rdx); // until everything initialized
1459 __ jcc(Assembler::greater, loop);
1460 __ bind(exit);
1461 }
1462
1463 // initialize fixed part of activation frame
1464 generate_fixed_frame(false);
1465
1466 // make sure method is not native & not abstract
1467 #ifdef ASSERT
1468 __ movl(rax, access_flags);
1469 {
1470 Label L;
1471 __ testl(rax, JVM_ACC_NATIVE);
1472 __ jcc(Assembler::zero, L);
1473 __ stop("tried to execute native method as non-native");
1474 __ bind(L);
1475 }
1476 {
1477 Label L;
1478 __ testl(rax, JVM_ACC_ABSTRACT);
1479 __ jcc(Assembler::zero, L);
1480 __ stop("tried to execute abstract method in interpreter");
1481 __ bind(L);
1482 }
1483 #endif
1484
1485 // Since at this point in the method invocation the exception
1486 // handler would try to exit the monitor of synchronized methods
1487 // which hasn't been entered yet, we set the thread local variable
1488 // _do_not_unlock_if_synchronized to true. The remove_activation
1489 // will check this flag.
1490
1491 const Address do_not_unlock_if_synchronized(r15_thread,
1492 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1493 __ movbool(do_not_unlock_if_synchronized, true);
1494
1495 __ profile_parameters_type(rax, rcx, rdx);
1496 // increment invocation count & check for overflow
1497 Label invocation_counter_overflow;
1498 Label profile_method;
1499 Label profile_method_continue;
1500 if (inc_counter) {
1501 generate_counter_incr(&invocation_counter_overflow,
1502 &profile_method,
1503 &profile_method_continue);
1504 if (ProfileInterpreter) {
1505 __ bind(profile_method_continue);
1506 }
1507 }
1508
1509 Label continue_after_compile;
1510 __ bind(continue_after_compile);
1511
1512 // check for synchronized interpreted methods
1513 bang_stack_shadow_pages(false);
1514
1515 // reset the _do_not_unlock_if_synchronized flag
1516 __ movbool(do_not_unlock_if_synchronized, false);
1517
1518 // check for synchronized methods
1519 // Must happen AFTER invocation_counter check and stack overflow check,
1520 // so method is not locked if overflows.
1521 if (synchronized) {
1522 // Allocate monitor and lock method
1523 lock_method();
1524 } else {
1525 // no synchronization necessary
1526 #ifdef ASSERT
1527 {
1528 Label L;
1529 __ movl(rax, access_flags);
1530 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1531 __ jcc(Assembler::zero, L);
1532 __ stop("method needs synchronization");
1533 __ bind(L);
1534 }
1535 #endif
1536 }
1537
1538 // start execution
1539 #ifdef ASSERT
1540 {
1541 Label L;
1542 const Address monitor_block_top (rbp,
1543 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1544 __ movptr(rax, monitor_block_top);
1545 __ cmpptr(rax, rsp);
1546 __ jcc(Assembler::equal, L);
1547 __ stop("broken stack frame setup in interpreter");
1548 __ bind(L);
1549 }
1550 #endif
1551
1552 // jvmti support
1553 __ notify_method_entry();
1554
1555 __ dispatch_next(vtos);
1556
1557 // invocation counter overflow
1558 if (inc_counter) {
1559 if (ProfileInterpreter) {
1560 // We have decided to profile this method in the interpreter
1561 __ bind(profile_method);
1562 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1563 __ set_method_data_pointer_for_bcp();
1564 __ get_method(rbx);
1565 __ jmp(profile_method_continue);
1566 }
1567 // Handle overflow of counter and compile method
1568 __ bind(invocation_counter_overflow);
1569 generate_counter_overflow(&continue_after_compile);
1570 }
1571
1572 return entry_point;
1573 }
1574
1575 // Entry points
1576 //
1577 // Here we generate the various kind of entries into the interpreter.
1578 // The two main entry type are generic bytecode methods and native
1579 // call method. These both come in synchronized and non-synchronized
1580 // versions but the frame layout they create is very similar. The
1581 // other method entry types are really just special purpose entries
1582 // that are really entry and interpretation all in one. These are for
1583 // trivial methods like accessor, empty, or special math methods.
1584 //
1585 // When control flow reaches any of the entry types for the interpreter
1586 // the following holds ->
1587 //
1588 // Arguments:
1589 //
1590 // rbx: Method*
1591 //
1592 // Stack layout immediately at entry
1593 //
1594 // [ return address ] <--- rsp
1595 // [ parameter n ]
1596 // ...
1597 // [ parameter 1 ]
1598 // [ expression stack ] (caller's java expression stack)
1599
1600 // Assuming that we don't go to one of the trivial specialized entries
1601 // the stack will look like below when we are ready to execute the
1602 // first bytecode (or call the native routine). The register usage
1603 // will be as the template based interpreter expects (see
1604 // interpreter_amd64.hpp).
1605 //
1606 // local variables follow incoming parameters immediately; i.e.
1607 // the return address is moved to the end of the locals).
1608 //
1609 // [ monitor entry ] <--- rsp
1610 // ...
1611 // [ monitor entry ]
1612 // [ expr. stack bottom ]
1613 // [ saved r13 ]
1614 // [ current r14 ]
1615 // [ Method* ]
1616 // [ saved ebp ] <--- rbp
1617 // [ return address ]
1618 // [ local variable m ]
1619 // ...
1620 // [ local variable 1 ]
1621 // [ parameter n ]
1622 // ...
1623 // [ parameter 1 ] <--- r14
1624
1625 address AbstractInterpreterGenerator::generate_method_entry(
1626 AbstractInterpreter::MethodKind kind) {
1627 // determine code generation flags
1628 bool synchronized = false;
1629 address entry_point = NULL;
1630 InterpreterGenerator* ig_this = (InterpreterGenerator*)this;
1631
1632 switch (kind) {
1633 case Interpreter::zerolocals : break;
1634 case Interpreter::zerolocals_synchronized: synchronized = true; break;
1635 case Interpreter::native : entry_point = ig_this->generate_native_entry(false); break;
1636 case Interpreter::native_synchronized : entry_point = ig_this->generate_native_entry(true); break;
1637 case Interpreter::empty : entry_point = ig_this->generate_empty_entry(); break;
1638 case Interpreter::accessor : entry_point = ig_this->generate_accessor_entry(); break;
1639 case Interpreter::abstract : entry_point = ig_this->generate_abstract_entry(); break;
1640
1641 case Interpreter::java_lang_math_sin : // fall thru
1642 case Interpreter::java_lang_math_cos : // fall thru
1643 case Interpreter::java_lang_math_tan : // fall thru
1644 case Interpreter::java_lang_math_abs : // fall thru
1645 case Interpreter::java_lang_math_log : // fall thru
1646 case Interpreter::java_lang_math_log10 : // fall thru
1647 case Interpreter::java_lang_math_sqrt : // fall thru
1648 case Interpreter::java_lang_math_pow : // fall thru
1649 case Interpreter::java_lang_math_exp : entry_point = ig_this->generate_math_entry(kind); break;
1650 case Interpreter::java_lang_ref_reference_get
1651 : entry_point = ig_this->generate_Reference_get_entry(); break;
1652 case Interpreter::java_util_zip_CRC32_update
1653 : entry_point = ig_this->generate_CRC32_update_entry(); break;
1654 case Interpreter::java_util_zip_CRC32_updateBytes
1655 : // fall thru
1656 case Interpreter::java_util_zip_CRC32_updateByteBuffer
1657 : entry_point = ig_this->generate_CRC32_updateBytes_entry(kind); break;
1658 default:
1659 fatal(err_msg("unexpected method kind: %d", kind));
1660 break;
1661 }
1662
1663 if (entry_point) {
1664 return entry_point;
1665 }
1666
1667 return ig_this->generate_normal_entry(synchronized);
1668 }
1669
1670 // These should never be compiled since the interpreter will prefer
1671 // the compiled version to the intrinsic version.
1672 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
1673 switch (method_kind(m)) {
1674 case Interpreter::java_lang_math_sin : // fall thru
1675 case Interpreter::java_lang_math_cos : // fall thru
1676 case Interpreter::java_lang_math_tan : // fall thru
1677 case Interpreter::java_lang_math_abs : // fall thru
1678 case Interpreter::java_lang_math_log : // fall thru
1679 case Interpreter::java_lang_math_log10 : // fall thru
1680 case Interpreter::java_lang_math_sqrt : // fall thru
1681 case Interpreter::java_lang_math_pow : // fall thru
1682 case Interpreter::java_lang_math_exp :
1683 return false;
1684 default:
1685 return true;
1686 }
1687 }
1688
1689 // How much stack a method activation needs in words.
1690 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
1691 const int entry_size = frame::interpreter_frame_monitor_size();
1692
1693 // total overhead size: entry_size + (saved rbp thru expr stack
1694 // bottom). be sure to change this if you add/subtract anything
1695 // to/from the overhead area
1696 const int overhead_size =
1697 -(frame::interpreter_frame_initial_sp_offset) + entry_size;
1698
1699 const int stub_code = frame::entry_frame_after_call_words;
1700 const int method_stack = (method->max_locals() + method->max_stack()) *
1701 Interpreter::stackElementWords;
1702 return (overhead_size + method_stack + stub_code);
1703 }
1704
1705 //-----------------------------------------------------------------------------
1706 // Exceptions
1707
1708 void TemplateInterpreterGenerator::generate_throw_exception() {
1709 // Entry point in previous activation (i.e., if the caller was
1710 // interpreted)
1711 Interpreter::_rethrow_exception_entry = __ pc();
1712 // Restore sp to interpreter_frame_last_sp even though we are going
1713 // to empty the expression stack for the exception processing.
1714 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1715 // rax: exception
1716 // rdx: return address/pc that threw exception
1717 __ restore_bcp(); // r13 points to call/send
1718 __ restore_locals();
1719 __ reinit_heapbase(); // restore r12 as heapbase.
1720 // Entry point for exceptions thrown within interpreter code
1721 Interpreter::_throw_exception_entry = __ pc();
1722 // expression stack is undefined here
1723 // rax: exception
1724 // r13: exception bcp
1725 __ verify_oop(rax);
1726 __ mov(c_rarg1, rax);
1727
1728 // expression stack must be empty before entering the VM in case of
1729 // an exception
1730 __ empty_expression_stack();
1731 // find exception handler address and preserve exception oop
1732 __ call_VM(rdx,
1733 CAST_FROM_FN_PTR(address,
1734 InterpreterRuntime::exception_handler_for_exception),
1735 c_rarg1);
1736 // rax: exception handler entry point
1737 // rdx: preserved exception oop
1738 // r13: bcp for exception handler
1739 __ push_ptr(rdx); // push exception which is now the only value on the stack
1740 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1741
1742 // If the exception is not handled in the current frame the frame is
1743 // removed and the exception is rethrown (i.e. exception
1744 // continuation is _rethrow_exception).
1745 //
1746 // Note: At this point the bci is still the bxi for the instruction
1747 // which caused the exception and the expression stack is
1748 // empty. Thus, for any VM calls at this point, GC will find a legal
1749 // oop map (with empty expression stack).
1750
1751 // In current activation
1752 // tos: exception
1753 // esi: exception bcp
1754
1755 //
1756 // JVMTI PopFrame support
1757 //
1758
1759 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1760 __ empty_expression_stack();
1761 // Set the popframe_processing bit in pending_popframe_condition
1762 // indicating that we are currently handling popframe, so that
1763 // call_VMs that may happen later do not trigger new popframe
1764 // handling cycles.
1765 __ movl(rdx, Address(r15_thread, JavaThread::popframe_condition_offset()));
1766 __ orl(rdx, JavaThread::popframe_processing_bit);
1767 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), rdx);
1768
1769 {
1770 // Check to see whether we are returning to a deoptimized frame.
1771 // (The PopFrame call ensures that the caller of the popped frame is
1772 // either interpreted or compiled and deoptimizes it if compiled.)
1773 // In this case, we can't call dispatch_next() after the frame is
1774 // popped, but instead must save the incoming arguments and restore
1775 // them after deoptimization has occurred.
1776 //
1777 // Note that we don't compare the return PC against the
1778 // deoptimization blob's unpack entry because of the presence of
1779 // adapter frames in C2.
1780 Label caller_not_deoptimized;
1781 __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize));
1782 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1783 InterpreterRuntime::interpreter_contains), c_rarg1);
1784 __ testl(rax, rax);
1785 __ jcc(Assembler::notZero, caller_not_deoptimized);
1786
1787 // Compute size of arguments for saving when returning to
1788 // deoptimized caller
1789 __ get_method(rax);
1790 __ movptr(rax, Address(rax, Method::const_offset()));
1791 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1792 size_of_parameters_offset())));
1793 __ shll(rax, Interpreter::logStackElementSize);
1794 __ restore_locals(); // XXX do we need this?
1795 __ subptr(r14, rax);
1796 __ addptr(r14, wordSize);
1797 // Save these arguments
1798 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1799 Deoptimization::
1800 popframe_preserve_args),
1801 r15_thread, rax, r14);
1802
1803 __ remove_activation(vtos, rdx,
1804 /* throw_monitor_exception */ false,
1805 /* install_monitor_exception */ false,
1806 /* notify_jvmdi */ false);
1807
1808 // Inform deoptimization that it is responsible for restoring
1809 // these arguments
1810 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1811 JavaThread::popframe_force_deopt_reexecution_bit);
1812
1813 // Continue in deoptimization handler
1814 __ jmp(rdx);
1815
1816 __ bind(caller_not_deoptimized);
1817 }
1818
1819 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1820 /* throw_monitor_exception */ false,
1821 /* install_monitor_exception */ false,
1822 /* notify_jvmdi */ false);
1823
1824 // Finish with popframe handling
1825 // A previous I2C followed by a deoptimization might have moved the
1826 // outgoing arguments further up the stack. PopFrame expects the
1827 // mutations to those outgoing arguments to be preserved and other
1828 // constraints basically require this frame to look exactly as
1829 // though it had previously invoked an interpreted activation with
1830 // no space between the top of the expression stack (current
1831 // last_sp) and the top of stack. Rather than force deopt to
1832 // maintain this kind of invariant all the time we call a small
1833 // fixup routine to move the mutated arguments onto the top of our
1834 // expression stack if necessary.
1835 __ mov(c_rarg1, rsp);
1836 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1837 // PC must point into interpreter here
1838 __ set_last_Java_frame(noreg, rbp, __ pc());
1839 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1840 __ reset_last_Java_frame(r15_thread, true);
1841 // Restore the last_sp and null it out
1842 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1843 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1844
1845 __ restore_bcp(); // XXX do we need this?
1846 __ restore_locals(); // XXX do we need this?
1847 // The method data pointer was incremented already during
1848 // call profiling. We have to restore the mdp for the current bcp.
1849 if (ProfileInterpreter) {
1850 __ set_method_data_pointer_for_bcp();
1851 }
1852
1853 // Clear the popframe condition flag
1854 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1855 JavaThread::popframe_inactive);
1856
1857 #if INCLUDE_JVMTI
1858 if (EnableInvokeDynamic) {
1859 Label L_done;
1860 const Register local0 = r14;
1861
1862 __ cmpb(Address(r13, 0), Bytecodes::_invokestatic);
1863 __ jcc(Assembler::notEqual, L_done);
1864
1865 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1866 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1867
1868 __ get_method(rdx);
1869 __ movptr(rax, Address(local0, 0));
1870 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, r13);
1871
1872 __ testptr(rax, rax);
1873 __ jcc(Assembler::zero, L_done);
1874
1875 __ movptr(Address(rbx, 0), rax);
1876 __ bind(L_done);
1877 }
1878 #endif // INCLUDE_JVMTI
1879
1880 __ dispatch_next(vtos);
1881 // end of PopFrame support
1882
1883 Interpreter::_remove_activation_entry = __ pc();
1884
1885 // preserve exception over this code sequence
1886 __ pop_ptr(rax);
1887 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), rax);
1888 // remove the activation (without doing throws on illegalMonitorExceptions)
1889 __ remove_activation(vtos, rdx, false, true, false);
1890 // restore exception
1891 __ get_vm_result(rax, r15_thread);
1892
1893 // In between activations - previous activation type unknown yet
1894 // compute continuation point - the continuation point expects the
1895 // following registers set up:
1896 //
1897 // rax: exception
1898 // rdx: return address/pc that threw exception
1899 // rsp: expression stack of caller
1900 // rbp: ebp of caller
1901 __ push(rax); // save exception
1902 __ push(rdx); // save return address
1903 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1904 SharedRuntime::exception_handler_for_return_address),
1905 r15_thread, rdx);
1906 __ mov(rbx, rax); // save exception handler
1907 __ pop(rdx); // restore return address
1908 __ pop(rax); // restore exception
1909 // Note that an "issuing PC" is actually the next PC after the call
1910 __ jmp(rbx); // jump to exception
1911 // handler of caller
1912 }
1913
1914
1915 //
1916 // JVMTI ForceEarlyReturn support
1917 //
1918 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1919 address entry = __ pc();
1920
1921 __ restore_bcp();
1922 __ restore_locals();
1923 __ empty_expression_stack();
1924 __ load_earlyret_value(state);
1925
1926 __ movptr(rdx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
1927 Address cond_addr(rdx, JvmtiThreadState::earlyret_state_offset());
1928
1929 // Clear the earlyret state
1930 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1931
1932 __ remove_activation(state, rsi,
1933 false, /* throw_monitor_exception */
1934 false, /* install_monitor_exception */
1935 true); /* notify_jvmdi */
1936 __ jmp(rsi);
1937
1938 return entry;
1939 } // end of ForceEarlyReturn support
1940
1941
1942 //-----------------------------------------------------------------------------
1943 // Helper for vtos entry point generation
1944
1945 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1946 address& bep,
1947 address& cep,
1948 address& sep,
1949 address& aep,
1950 address& iep,
1951 address& lep,
1952 address& fep,
1953 address& dep,
1954 address& vep) {
1955 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1956 Label L;
1957 aep = __ pc(); __ push_ptr(); __ jmp(L);
1958 fep = __ pc(); __ push_f(); __ jmp(L);
1959 dep = __ pc(); __ push_d(); __ jmp(L);
1960 lep = __ pc(); __ push_l(); __ jmp(L);
1961 bep = cep = sep =
1962 iep = __ pc(); __ push_i();
1963 vep = __ pc();
1964 __ bind(L);
1965 generate_and_dispatch(t);
1966 }
1967
1968
1969 //-----------------------------------------------------------------------------
1970 // Generation of individual instructions
1971
1972 // helpers for generate_and_dispatch
1973
1974
1975 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1976 : TemplateInterpreterGenerator(code) {
1977 generate_all(); // down here so it can be "virtual"
1978 }
1979
1980 //-----------------------------------------------------------------------------
1981
1982 // Non-product code
1983 #ifndef PRODUCT
1984 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1985 address entry = __ pc();
1986
1987 __ push(state);
1988 __ push(c_rarg0);
1989 __ push(c_rarg1);
1990 __ push(c_rarg2);
1991 __ push(c_rarg3);
1992 __ mov(c_rarg2, rax); // Pass itos
1993 #ifdef _WIN64
1994 __ movflt(xmm3, xmm0); // Pass ftos
1995 #endif
1996 __ call_VM(noreg,
1997 CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode),
1998 c_rarg1, c_rarg2, c_rarg3);
1999 __ pop(c_rarg3);
2000 __ pop(c_rarg2);
2001 __ pop(c_rarg1);
2002 __ pop(c_rarg0);
2003 __ pop(state);
2004 __ ret(0); // return from result handler
2005
2006 return entry;
2007 }
2008
2009 void TemplateInterpreterGenerator::count_bytecode() {
2010 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
2011 }
2012
2013 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
2014 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
2015 }
2016
2017 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
2018 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
2019 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
2020 __ orl(rbx,
2021 ((int) t->bytecode()) <<
2022 BytecodePairHistogram::log2_number_of_codes);
2023 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
2024 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
2025 __ incrementl(Address(rscratch1, rbx, Address::times_4));
2026 }
2027
2028
2029 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
2030 // Call a little run-time stub to avoid blow-up for each bytecode.
2031 // The run-time runtime saves the right registers, depending on
2032 // the tosca in-state for the given template.
2033
2034 assert(Interpreter::trace_code(t->tos_in()) != NULL,
2035 "entry must have been generated");
2036 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
2037 __ andptr(rsp, -16); // align stack as required by ABI
2038 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
2039 __ mov(rsp, r12); // restore sp
2040 __ reinit_heapbase();
2041 }
2042
2043
2044 void TemplateInterpreterGenerator::stop_interpreter_at() {
2045 Label L;
2046 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
2047 StopInterpreterAt);
2048 __ jcc(Assembler::notEqual, L);
2049 __ int3();
2050 __ bind(L);
2051 }
2052 #endif // !PRODUCT
2053 #endif // ! CC_INTERP