1 /*
2 * Copyright (c) 2003, 2015, 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/interp_masm.hpp"
32 #include "interpreter/templateTable.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/deoptimization.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/synchronizer.hpp"
45 #include "runtime/timer.hpp"
46 #include "runtime/vframeArray.hpp"
47 #include "utilities/debug.hpp"
48 #include "utilities/macros.hpp"
49
50 #define __ _masm->
51
52 #ifndef CC_INTERP
53
54 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
55 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
56 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
57
58 //-----------------------------------------------------------------------------
59
60 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
61 address entry = __ pc();
62
63 #ifdef ASSERT
64 {
65 Label L;
66 __ lea(rax, Address(rbp,
67 frame::interpreter_frame_monitor_block_top_offset *
68 wordSize));
69 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
70 // grows negative)
71 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
72 __ stop ("interpreter frame not set up");
73 __ bind(L);
74 }
75 #endif // ASSERT
76 // Restore bcp under the assumption that the current frame is still
77 // interpreted
78 __ restore_bcp();
79
80 // expression stack must be empty before entering the VM if an
81 // exception happened
82 __ empty_expression_stack();
83 // throw exception
84 __ call_VM(noreg,
85 CAST_FROM_FN_PTR(address,
86 InterpreterRuntime::throw_StackOverflowError));
87 return entry;
88 }
89
90 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
91 const char* name) {
92 address entry = __ pc();
93 // expression stack must be empty before entering the VM if an
94 // exception happened
95 __ empty_expression_stack();
96 // setup parameters
97 // ??? convention: expect aberrant index in register ebx
98 __ lea(c_rarg1, ExternalAddress((address)name));
99 __ call_VM(noreg,
100 CAST_FROM_FN_PTR(address,
101 InterpreterRuntime::
102 throw_ArrayIndexOutOfBoundsException),
103 c_rarg1, rbx);
104 return entry;
105 }
106
107 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
108 address entry = __ pc();
109
110 // object is at TOS
111 __ pop(c_rarg1);
112
113 // expression stack must be empty before entering the VM if an
114 // exception happened
115 __ empty_expression_stack();
116
117 __ call_VM(noreg,
118 CAST_FROM_FN_PTR(address,
119 InterpreterRuntime::
120 throw_ClassCastException),
121 c_rarg1);
122 return entry;
123 }
124
125 address TemplateInterpreterGenerator::generate_exception_handler_common(
126 const char* name, const char* message, bool pass_oop) {
127 assert(!pass_oop || message == NULL, "either oop or message but not both");
128 address entry = __ pc();
129 if (pass_oop) {
130 // object is at TOS
131 __ pop(c_rarg2);
132 }
133 // expression stack must be empty before entering the VM if an
134 // exception happened
135 __ empty_expression_stack();
136 // setup parameters
137 __ lea(c_rarg1, ExternalAddress((address)name));
138 if (pass_oop) {
139 __ call_VM(rax, CAST_FROM_FN_PTR(address,
140 InterpreterRuntime::
141 create_klass_exception),
142 c_rarg1, c_rarg2);
143 } else {
144 // kind of lame ExternalAddress can't take NULL because
145 // external_word_Relocation will assert.
146 if (message != NULL) {
147 __ lea(c_rarg2, ExternalAddress((address)message));
148 } else {
149 __ movptr(c_rarg2, NULL_WORD);
150 }
151 __ call_VM(rax,
152 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
153 c_rarg1, c_rarg2);
154 }
155 // throw exception
156 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
157 return entry;
158 }
159
160
161 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
162 address entry = __ pc();
163 // NULL last_sp until next java call
164 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
165 __ dispatch_next(state);
166 return entry;
167 }
168
169
170 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
171 address entry = __ pc();
172
173 // Restore stack bottom in case i2c adjusted stack
174 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
175 // and NULL it as marker that esp is now tos until next java call
176 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
177
178 __ restore_bcp();
179 __ restore_locals();
180
181 if (state == atos) {
182 Register mdp = rbx;
183 Register tmp = rcx;
184 __ profile_return_type(mdp, rax, tmp);
185 }
186
187 const Register cache = rbx;
188 const Register index = rcx;
189 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
190
191 const Register flags = cache;
192 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
193 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
194 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
195 __ dispatch_next(state, step);
196
197 return entry;
198 }
199
200
201 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
202 int step) {
203 address entry = __ pc();
204 // NULL last_sp until next java call
205 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
206 __ restore_bcp();
207 __ restore_locals();
208 // handle exceptions
209 {
210 Label L;
211 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
212 __ jcc(Assembler::zero, L);
213 __ call_VM(noreg,
214 CAST_FROM_FN_PTR(address,
215 InterpreterRuntime::throw_pending_exception));
216 __ should_not_reach_here();
217 __ bind(L);
218 }
219 __ dispatch_next(state, step);
220 return entry;
221 }
222
223 int AbstractInterpreter::BasicType_as_index(BasicType type) {
224 int i = 0;
225 switch (type) {
226 case T_BOOLEAN: i = 0; break;
227 case T_CHAR : i = 1; break;
228 case T_BYTE : i = 2; break;
229 case T_SHORT : i = 3; break;
230 case T_INT : i = 4; break;
231 case T_LONG : i = 5; break;
232 case T_VOID : i = 6; break;
233 case T_FLOAT : i = 7; break;
234 case T_DOUBLE : i = 8; break;
235 case T_OBJECT : i = 9; break;
236 case T_ARRAY : i = 9; break;
237 default : ShouldNotReachHere();
238 }
239 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
240 "index out of bounds");
241 return i;
242 }
243
244
245 address TemplateInterpreterGenerator::generate_result_handler_for(
246 BasicType type) {
247 address entry = __ pc();
248 switch (type) {
249 case T_BOOLEAN: __ c2bool(rax); break;
250 case T_CHAR : __ movzwl(rax, rax); break;
251 case T_BYTE : __ sign_extend_byte(rax); break;
252 case T_SHORT : __ sign_extend_short(rax); break;
253 case T_INT : /* nothing to do */ break;
254 case T_LONG : /* nothing to do */ break;
255 case T_VOID : /* nothing to do */ break;
256 case T_FLOAT : /* nothing to do */ break;
257 case T_DOUBLE : /* nothing to do */ break;
258 case T_OBJECT :
259 // retrieve result from frame
260 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
261 // and verify it
262 __ verify_oop(rax);
263 break;
264 default : ShouldNotReachHere();
265 }
266 __ ret(0); // return from result handler
267 return entry;
268 }
269
270 address TemplateInterpreterGenerator::generate_safept_entry_for(
271 TosState state,
272 address runtime_entry) {
273 address entry = __ pc();
274 __ push(state);
275 __ call_VM(noreg, runtime_entry);
276 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
277 return entry;
278 }
279
280
281
282 // Helpers for commoning out cases in the various type of method entries.
283 //
284
285
286 // increment invocation count & check for overflow
287 //
288 // Note: checking for negative value instead of overflow
289 // so we have a 'sticky' overflow test
290 //
291 // rbx: method
292 // ecx: invocation counter
293 //
294 void InterpreterGenerator::generate_counter_incr(
295 Label* overflow,
296 Label* profile_method,
297 Label* profile_method_continue) {
298 Label done;
299 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
300 if (TieredCompilation) {
301 int increment = InvocationCounter::count_increment;
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 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
312 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
313 __ jmp(done);
314 }
315 __ bind(no_mdo);
316 // Increment counter in MethodCounters
317 const Address invocation_counter(rax,
318 MethodCounters::invocation_counter_offset() +
319 InvocationCounter::counter_offset());
320 __ get_method_counters(rbx, rax, done);
321 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
322 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
323 false, Assembler::zero, overflow);
324 __ bind(done);
325 } else { // not TieredCompilation
326 const Address backedge_counter(rax,
327 MethodCounters::backedge_counter_offset() +
328 InvocationCounter::counter_offset());
329 const Address invocation_counter(rax,
330 MethodCounters::invocation_counter_offset() +
331 InvocationCounter::counter_offset());
332
333 __ get_method_counters(rbx, rax, done);
334
335 if (ProfileInterpreter) {
336 __ incrementl(Address(rax,
337 MethodCounters::interpreter_invocation_counter_offset()));
338 }
339 // Update standard invocation counters
340 __ movl(rcx, invocation_counter);
341 __ incrementl(rcx, InvocationCounter::count_increment);
342 __ movl(invocation_counter, rcx); // save invocation count
343
344 __ movl(rax, backedge_counter); // load backedge counter
345 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
346
347 __ addl(rcx, rax); // add both counters
348
349 // profile_method is non-null only for interpreted method so
350 // profile_method != NULL == !native_call
351
352 if (ProfileInterpreter && profile_method != NULL) {
353 // Test to see if we should create a method data oop
354 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
355 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
356 __ jcc(Assembler::less, *profile_method_continue);
357
358 // if no method data exists, go to profile_method
359 __ test_method_data_pointer(rax, *profile_method);
360 }
361
362 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
363 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
364 __ jcc(Assembler::aboveEqual, *overflow);
365 __ bind(done);
366 }
367 }
368
369 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
370
371 // Asm interpreter on entry
372 // r14 - locals
373 // r13 - bcp
374 // rbx - method
375 // edx - cpool --- DOES NOT APPEAR TO BE TRUE
376 // rbp - interpreter frame
377
378 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
379 // Everything as it was on entry
380 // rdx is not restored. Doesn't appear to really be set.
381
382 // InterpreterRuntime::frequency_counter_overflow takes two
383 // arguments, the first (thread) is passed by call_VM, the second
384 // indicates if the counter overflow occurs at a backwards branch
385 // (NULL bcp). We pass zero for it. The call returns the address
386 // of the verified entry point for the method or NULL if the
387 // compilation did not complete (either went background or bailed
388 // out).
389 __ movl(c_rarg1, 0);
390 __ call_VM(noreg,
391 CAST_FROM_FN_PTR(address,
392 InterpreterRuntime::frequency_counter_overflow),
393 c_rarg1);
394
395 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
396 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
397 // and jump to the interpreted entry.
398 __ jmp(*do_continue, relocInfo::none);
399 }
400
401 // See if we've got enough room on the stack for locals plus overhead.
402 // The expression stack grows down incrementally, so the normal guard
403 // page mechanism will work for that.
404 //
405 // NOTE: Since the additional locals are also always pushed (wasn't
406 // obvious in generate_fixed_frame) so the guard should work for them
407 // too.
408 //
409 // Args:
410 // rdx: number of additional locals this frame needs (what we must check)
411 // rbx: Method*
412 //
413 // Kills:
414 // rax
415 void InterpreterGenerator::generate_stack_overflow_check(void) {
416
417 // monitor entry size: see picture of stack in frame_x86.hpp
418 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
419
420 // total overhead size: entry_size + (saved rbp through expr stack
421 // bottom). be sure to change this if you add/subtract anything
422 // to/from the overhead area
423 const int overhead_size =
424 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
425
426 const int page_size = os::vm_page_size();
427
428 Label after_frame_check;
429
430 // see if the frame is greater than one page in size. If so,
431 // then we need to verify there is enough stack space remaining
432 // for the additional locals.
433 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
434 __ jcc(Assembler::belowEqual, after_frame_check);
435
436 // compute rsp as if this were going to be the last frame on
437 // the stack before the red zone
438
439 const Address stack_base(r15_thread, Thread::stack_base_offset());
440 const Address stack_size(r15_thread, Thread::stack_size_offset());
441
442 // locals + overhead, in bytes
443 __ mov(rax, rdx);
444 __ shlptr(rax, Interpreter::logStackElementSize); // 2 slots per parameter.
445 __ addptr(rax, overhead_size);
446
447 #ifdef ASSERT
448 Label stack_base_okay, stack_size_okay;
449 // verify that thread stack base is non-zero
450 __ cmpptr(stack_base, (int32_t)NULL_WORD);
451 __ jcc(Assembler::notEqual, stack_base_okay);
452 __ stop("stack base is zero");
453 __ bind(stack_base_okay);
454 // verify that thread stack size is non-zero
455 __ cmpptr(stack_size, 0);
456 __ jcc(Assembler::notEqual, stack_size_okay);
457 __ stop("stack size is zero");
458 __ bind(stack_size_okay);
459 #endif
460
461 // Add stack base to locals and subtract stack size
462 __ addptr(rax, stack_base);
463 __ subptr(rax, stack_size);
464
465 // Use the maximum number of pages we might bang.
466 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
467 (StackRedPages+StackYellowPages);
468
469 // add in the red and yellow zone sizes
470 __ addptr(rax, max_pages * page_size);
471
472 // check against the current stack bottom
473 __ cmpptr(rsp, rax);
474 __ jcc(Assembler::above, after_frame_check);
475
476 // Restore sender's sp as SP. This is necessary if the sender's
477 // frame is an extended compiled frame (see gen_c2i_adapter())
478 // and safer anyway in case of JSR292 adaptations.
479
480 __ pop(rax); // return address must be moved if SP is changed
481 __ mov(rsp, r13);
482 __ push(rax);
483
484 // Note: the restored frame is not necessarily interpreted.
485 // Use the shared runtime version of the StackOverflowError.
486 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
487 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
488
489 // all done with frame size check
490 __ bind(after_frame_check);
491 }
492
493 // Allocate monitor and lock method (asm interpreter)
494 //
495 // Args:
496 // rbx: Method*
497 // r14: locals
498 //
499 // Kills:
500 // rax
501 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
502 // rscratch1, rscratch2 (scratch regs)
503 void InterpreterGenerator::lock_method(void) {
504 // synchronize method
505 const Address access_flags(rbx, Method::access_flags_offset());
506 const Address monitor_block_top(
507 rbp,
508 frame::interpreter_frame_monitor_block_top_offset * wordSize);
509 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
510
511 #ifdef ASSERT
512 {
513 Label L;
514 __ movl(rax, access_flags);
515 __ testl(rax, JVM_ACC_SYNCHRONIZED);
516 __ jcc(Assembler::notZero, L);
517 __ stop("method doesn't need synchronization");
518 __ bind(L);
519 }
520 #endif // ASSERT
521
522 // get synchronization object
523 {
524 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
525 Label done;
526 __ movl(rax, access_flags);
527 __ testl(rax, JVM_ACC_STATIC);
528 // get receiver (assume this is frequent case)
529 __ movptr(rax, Address(r14, Interpreter::local_offset_in_bytes(0)));
530 __ jcc(Assembler::zero, done);
531 __ movptr(rax, Address(rbx, Method::const_offset()));
532 __ movptr(rax, Address(rax, ConstMethod::constants_offset()));
533 __ movptr(rax, Address(rax,
534 ConstantPool::pool_holder_offset_in_bytes()));
535 __ movptr(rax, Address(rax, mirror_offset));
536
537 #ifdef ASSERT
538 {
539 Label L;
540 __ testptr(rax, rax);
541 __ jcc(Assembler::notZero, L);
542 __ stop("synchronization object is NULL");
543 __ bind(L);
544 }
545 #endif // ASSERT
546
547 __ bind(done);
548 }
549
550 // add space for monitor & lock
551 __ subptr(rsp, entry_size); // add space for a monitor entry
552 __ movptr(monitor_block_top, rsp); // set new monitor block top
553 // store object
554 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
555 __ movptr(c_rarg1, rsp); // object address
556 __ lock_object(c_rarg1);
557 }
558
559 // Generate a fixed interpreter frame. This is identical setup for
560 // interpreted methods and for native methods hence the shared code.
561 //
562 // Args:
563 // rax: return address
564 // rbx: Method*
565 // r14: pointer to locals
566 // r13: sender sp
567 // rdx: cp cache
568 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
569 // initialize fixed part of activation frame
570 __ push(rax); // save return address
571 __ enter(); // save old & set new rbp
572 __ push(r13); // set sender sp
573 __ push((int)NULL_WORD); // leave last_sp as null
574 __ movptr(r13, Address(rbx, Method::const_offset())); // get ConstMethod*
575 __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase
576 __ push(rbx); // save Method*
577 if (ProfileInterpreter) {
578 Label method_data_continue;
579 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
580 __ testptr(rdx, rdx);
581 __ jcc(Assembler::zero, method_data_continue);
582 __ addptr(rdx, in_bytes(MethodData::data_offset()));
583 __ bind(method_data_continue);
584 __ push(rdx); // set the mdp (method data pointer)
585 } else {
586 __ push(0);
587 }
588
589 __ movptr(rdx, Address(rbx, Method::const_offset()));
590 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
591 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
592 __ push(rdx); // set constant pool cache
593 __ push(r14); // set locals pointer
594 if (native_call) {
595 __ push(0); // no bcp
596 } else {
597 __ push(r13); // set bcp
598 }
599 __ push(0); // reserve word for pointer to expression stack bottom
600 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
601 }
602
603 // End of helpers
604
605 // Method entry for java.lang.ref.Reference.get.
606 address InterpreterGenerator::generate_Reference_get_entry(void) {
607 #if INCLUDE_ALL_GCS
608 // Code: _aload_0, _getfield, _areturn
609 // parameter size = 1
610 //
611 // The code that gets generated by this routine is split into 2 parts:
612 // 1. The "intrinsified" code for G1 (or any SATB based GC),
613 // 2. The slow path - which is an expansion of the regular method entry.
614 //
615 // Notes:-
616 // * In the G1 code we do not check whether we need to block for
617 // a safepoint. If G1 is enabled then we must execute the specialized
618 // code for Reference.get (except when the Reference object is null)
619 // so that we can log the value in the referent field with an SATB
620 // update buffer.
621 // If the code for the getfield template is modified so that the
622 // G1 pre-barrier code is executed when the current method is
623 // Reference.get() then going through the normal method entry
624 // will be fine.
625 // * The G1 code can, however, check the receiver object (the instance
626 // of java.lang.Reference) and jump to the slow path if null. If the
627 // Reference object is null then we obviously cannot fetch the referent
628 // and so we don't need to call the G1 pre-barrier. Thus we can use the
629 // regular method entry code to generate the NPE.
630 //
631 // rbx: Method*
632
633 // r13: senderSP must preserve for slow path, set SP to it on fast path
634
635 address entry = __ pc();
636
637 const int referent_offset = java_lang_ref_Reference::referent_offset;
638 guarantee(referent_offset > 0, "referent offset not initialized");
639
640 if (UseG1GC) {
641 Label slow_path;
642 // rbx: method
643
644 // Check if local 0 != NULL
645 // If the receiver is null then it is OK to jump to the slow path.
646 __ movptr(rax, Address(rsp, wordSize));
647
648 __ testptr(rax, rax);
649 __ jcc(Assembler::zero, slow_path);
650
651 // rax: local 0
652 // rbx: method (but can be used as scratch now)
653 // rdx: scratch
654 // rdi: scratch
655
656 // Generate the G1 pre-barrier code to log the value of
657 // the referent field in an SATB buffer.
658
659 // Load the value of the referent field.
660 const Address field_address(rax, referent_offset);
661 __ load_heap_oop(rax, field_address);
662
663 // Generate the G1 pre-barrier code to log the value of
664 // the referent field in an SATB buffer.
665 __ g1_write_barrier_pre(noreg /* obj */,
666 rax /* pre_val */,
667 r15_thread /* thread */,
668 rbx /* tmp */,
669 true /* tosca_live */,
670 true /* expand_call */);
671
672 // _areturn
673 __ pop(rdi); // get return address
674 __ mov(rsp, r13); // set sp to sender sp
675 __ jmp(rdi);
676 __ ret(0);
677
678 // generate a vanilla interpreter entry as the slow path
679 __ bind(slow_path);
680 (void) generate_normal_entry(false);
681
682 return entry;
683 }
684 #endif // INCLUDE_ALL_GCS
685
686 // If G1 is not enabled then attempt to go through the accessor entry point
687 // Reference.get is an accessor
688 return generate_jump_to_normal_entry();
689 }
690
691 /**
692 * Method entry for static native methods:
693 * int java.util.zip.CRC32.update(int crc, int b)
694 */
695 address InterpreterGenerator::generate_CRC32_update_entry() {
696 if (UseCRC32Intrinsics) {
697 address entry = __ pc();
698
699 // rbx,: Method*
700 // r13: senderSP must preserved for slow path, set SP to it on fast path
701 // c_rarg0: scratch (rdi on non-Win64, rcx on Win64)
702 // c_rarg1: scratch (rsi on non-Win64, rdx on Win64)
703
704 Label slow_path;
705 // If we need a safepoint check, generate full interpreter entry.
706 ExternalAddress state(SafepointSynchronize::address_of_state());
707 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
708 SafepointSynchronize::_not_synchronized);
709 __ jcc(Assembler::notEqual, slow_path);
710
711 // We don't generate local frame and don't align stack because
712 // we call stub code and there is no safepoint on this path.
713
714 // Load parameters
715 const Register crc = rax; // crc
716 const Register val = c_rarg0; // source java byte value
717 const Register tbl = c_rarg1; // scratch
718
719 // Arguments are reversed on java expression stack
720 __ movl(val, Address(rsp, wordSize)); // byte value
721 __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC
722
723 __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr()));
724 __ notl(crc); // ~crc
725 __ update_byte_crc32(crc, val, tbl);
726 __ notl(crc); // ~crc
727 // result in rax
728
729 // _areturn
730 __ pop(rdi); // get return address
731 __ mov(rsp, r13); // set sp to sender sp
732 __ jmp(rdi);
733
734 // generate a vanilla native entry as the slow path
735 __ bind(slow_path);
736
737 (void) generate_native_entry(false);
738
739 return entry;
740 }
741 return generate_native_entry(false);
742 }
743
744 /**
745 * Method entry for static native methods:
746 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
747 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
748 */
749 address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
750 if (UseCRC32Intrinsics) {
751 address entry = __ pc();
752
753 // rbx,: Method*
754 // r13: senderSP must preserved for slow path, set SP to it on fast path
755
756 Label slow_path;
757 // If we need a safepoint check, generate full interpreter entry.
758 ExternalAddress state(SafepointSynchronize::address_of_state());
759 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
760 SafepointSynchronize::_not_synchronized);
761 __ jcc(Assembler::notEqual, slow_path);
762
763 // We don't generate local frame and don't align stack because
764 // we call stub code and there is no safepoint on this path.
765
766 // Load parameters
767 const Register crc = c_rarg0; // crc
768 const Register buf = c_rarg1; // source java byte array address
769 const Register len = c_rarg2; // length
770 const Register off = len; // offset (never overlaps with 'len')
771
772 // Arguments are reversed on java expression stack
773 // Calculate address of start element
774 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
775 __ movptr(buf, Address(rsp, 3*wordSize)); // long buf
776 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
777 __ addq(buf, off); // + offset
778 __ movl(crc, Address(rsp, 5*wordSize)); // Initial CRC
779 } else {
780 __ movptr(buf, Address(rsp, 3*wordSize)); // byte[] array
781 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
782 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
783 __ addq(buf, off); // + offset
784 __ movl(crc, Address(rsp, 4*wordSize)); // Initial CRC
785 }
786 // Can now load 'len' since we're finished with 'off'
787 __ movl(len, Address(rsp, wordSize)); // Length
788
789 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len);
790 // result in rax
791
792 // _areturn
793 __ pop(rdi); // get return address
794 __ mov(rsp, r13); // set sp to sender sp
795 __ jmp(rdi);
796
797 // generate a vanilla native entry as the slow path
798 __ bind(slow_path);
799
800 (void) generate_native_entry(false);
801
802 return entry;
803 }
804 return generate_native_entry(false);
805 }
806
807 // Interpreter stub for calling a native method. (asm interpreter)
808 // This sets up a somewhat different looking stack for calling the
809 // native method than the typical interpreter frame setup.
810 address InterpreterGenerator::generate_native_entry(bool synchronized) {
811 // determine code generation flags
812 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
813
814 // rbx: Method*
815 // r13: sender sp
816
817 address entry_point = __ pc();
818
819 const Address constMethod (rbx, Method::const_offset());
820 const Address access_flags (rbx, Method::access_flags_offset());
821 const Address size_of_parameters(rcx, ConstMethod::
822 size_of_parameters_offset());
823
824
825 // get parameter size (always needed)
826 __ movptr(rcx, constMethod);
827 __ load_unsigned_short(rcx, size_of_parameters);
828
829 // native calls don't need the stack size check since they have no
830 // expression stack and the arguments are already on the stack and
831 // we only add a handful of words to the stack
832
833 // rbx: Method*
834 // rcx: size of parameters
835 // r13: sender sp
836 __ pop(rax); // get return address
837
838 // for natives the size of locals is zero
839
840 // compute beginning of parameters (r14)
841 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
842
843 // add 2 zero-initialized slots for native calls
844 // initialize result_handler slot
845 __ push((int) NULL_WORD);
846 // slot for oop temp
847 // (static native method holder mirror/jni oop result)
848 __ push((int) NULL_WORD);
849
850 // initialize fixed part of activation frame
851 generate_fixed_frame(true);
852
853 // make sure method is native & not abstract
854 #ifdef ASSERT
855 __ movl(rax, access_flags);
856 {
857 Label L;
858 __ testl(rax, JVM_ACC_NATIVE);
859 __ jcc(Assembler::notZero, L);
860 __ stop("tried to execute non-native method as native");
861 __ bind(L);
862 }
863 {
864 Label L;
865 __ testl(rax, JVM_ACC_ABSTRACT);
866 __ jcc(Assembler::zero, L);
867 __ stop("tried to execute abstract method in interpreter");
868 __ bind(L);
869 }
870 #endif
871
872 // Since at this point in the method invocation the exception handler
873 // would try to exit the monitor of synchronized methods which hasn't
874 // been entered yet, we set the thread local variable
875 // _do_not_unlock_if_synchronized to true. The remove_activation will
876 // check this flag.
877
878 const Address do_not_unlock_if_synchronized(r15_thread,
879 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
880 __ movbool(do_not_unlock_if_synchronized, true);
881
882 // increment invocation count & check for overflow
883 Label invocation_counter_overflow;
884 if (inc_counter) {
885 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
886 }
887
888 Label continue_after_compile;
889 __ bind(continue_after_compile);
890
891 bang_stack_shadow_pages(true);
892
893 // reset the _do_not_unlock_if_synchronized flag
894 __ movbool(do_not_unlock_if_synchronized, false);
895
896 // check for synchronized methods
897 // Must happen AFTER invocation_counter check and stack overflow check,
898 // so method is not locked if overflows.
899 if (synchronized) {
900 lock_method();
901 } else {
902 // no synchronization necessary
903 #ifdef ASSERT
904 {
905 Label L;
906 __ movl(rax, access_flags);
907 __ testl(rax, JVM_ACC_SYNCHRONIZED);
908 __ jcc(Assembler::zero, L);
909 __ stop("method needs synchronization");
910 __ bind(L);
911 }
912 #endif
913 }
914
915 // start execution
916 #ifdef ASSERT
917 {
918 Label L;
919 const Address monitor_block_top(rbp,
920 frame::interpreter_frame_monitor_block_top_offset * wordSize);
921 __ movptr(rax, monitor_block_top);
922 __ cmpptr(rax, rsp);
923 __ jcc(Assembler::equal, L);
924 __ stop("broken stack frame setup in interpreter");
925 __ bind(L);
926 }
927 #endif
928
929 // jvmti support
930 __ notify_method_entry();
931
932 // work registers
933 const Register method = rbx;
934 const Register t = r11;
935
936 // allocate space for parameters
937 __ get_method(method);
938 __ movptr(t, Address(method, Method::const_offset()));
939 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
940 __ shll(t, Interpreter::logStackElementSize);
941
942 __ subptr(rsp, t);
943 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
944 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
945
946 // get signature handler
947 {
948 Label L;
949 __ movptr(t, Address(method, Method::signature_handler_offset()));
950 __ testptr(t, t);
951 __ jcc(Assembler::notZero, L);
952 __ call_VM(noreg,
953 CAST_FROM_FN_PTR(address,
954 InterpreterRuntime::prepare_native_call),
955 method);
956 __ get_method(method);
957 __ movptr(t, Address(method, Method::signature_handler_offset()));
958 __ bind(L);
959 }
960
961 // call signature handler
962 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == r14,
963 "adjust this code");
964 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
965 "adjust this code");
966 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
967 "adjust this code");
968
969 // The generated handlers do not touch RBX (the method oop).
970 // However, large signatures cannot be cached and are generated
971 // each time here. The slow-path generator can do a GC on return,
972 // so we must reload it after the call.
973 __ call(t);
974 __ get_method(method); // slow path can do a GC, reload RBX
975
976
977 // result handler is in rax
978 // set result handler
979 __ movptr(Address(rbp,
980 (frame::interpreter_frame_result_handler_offset) * wordSize),
981 rax);
982
983 // pass mirror handle if static call
984 {
985 Label L;
986 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
987 __ movl(t, Address(method, Method::access_flags_offset()));
988 __ testl(t, JVM_ACC_STATIC);
989 __ jcc(Assembler::zero, L);
990 // get mirror
991 __ movptr(t, Address(method, Method::const_offset()));
992 __ movptr(t, Address(t, ConstMethod::constants_offset()));
993 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
994 __ movptr(t, Address(t, mirror_offset));
995 // copy mirror into activation frame
996 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
997 t);
998 // pass handle to mirror
999 __ lea(c_rarg1,
1000 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1001 __ bind(L);
1002 }
1003
1004 // get native function entry point
1005 {
1006 Label L;
1007 __ movptr(rax, Address(method, Method::native_function_offset()));
1008 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1009 __ movptr(rscratch2, unsatisfied.addr());
1010 __ cmpptr(rax, rscratch2);
1011 __ jcc(Assembler::notEqual, L);
1012 __ call_VM(noreg,
1013 CAST_FROM_FN_PTR(address,
1014 InterpreterRuntime::prepare_native_call),
1015 method);
1016 __ get_method(method);
1017 __ movptr(rax, Address(method, Method::native_function_offset()));
1018 __ bind(L);
1019 }
1020
1021 // pass JNIEnv
1022 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1023
1024 // It is enough that the pc() points into the right code
1025 // segment. It does not have to be the correct return pc.
1026 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1027
1028 // change thread state
1029 #ifdef ASSERT
1030 {
1031 Label L;
1032 __ movl(t, Address(r15_thread, JavaThread::thread_state_offset()));
1033 __ cmpl(t, _thread_in_Java);
1034 __ jcc(Assembler::equal, L);
1035 __ stop("Wrong thread state in native stub");
1036 __ bind(L);
1037 }
1038 #endif
1039
1040 // Change state to native
1041
1042 __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
1043 _thread_in_native);
1044
1045 // Call the native method.
1046 __ call(rax);
1047 // result potentially in rax or xmm0
1048
1049 // Verify or restore cpu control state after JNI call
1050 __ restore_cpu_control_state_after_jni();
1051
1052 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1053 // in order to extract the result of a method call. If the order of these
1054 // pushes change or anything else is added to the stack then the code in
1055 // interpreter_frame_result must also change.
1056
1057 __ push(dtos);
1058 __ push(ltos);
1059
1060 // change thread state
1061 __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
1062 _thread_in_native_trans);
1063
1064 if (os::is_MP()) {
1065 if (UseMembar) {
1066 // Force this write out before the read below
1067 __ membar(Assembler::Membar_mask_bits(
1068 Assembler::LoadLoad | Assembler::LoadStore |
1069 Assembler::StoreLoad | Assembler::StoreStore));
1070 } else {
1071 // Write serialization page so VM thread can do a pseudo remote membar.
1072 // We use the current thread pointer to calculate a thread specific
1073 // offset to write to within the page. This minimizes bus traffic
1074 // due to cache line collision.
1075 __ serialize_memory(r15_thread, rscratch2);
1076 }
1077 }
1078
1079 // check for safepoint operation in progress and/or pending suspend requests
1080 {
1081 Label Continue;
1082 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1083 SafepointSynchronize::_not_synchronized);
1084
1085 Label L;
1086 __ jcc(Assembler::notEqual, L);
1087 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0);
1088 __ jcc(Assembler::equal, Continue);
1089 __ bind(L);
1090
1091 // Don't use call_VM as it will see a possible pending exception
1092 // and forward it and never return here preventing us from
1093 // clearing _last_native_pc down below. Also can't use
1094 // call_VM_leaf either as it will check to see if r13 & r14 are
1095 // preserved and correspond to the bcp/locals pointers. So we do a
1096 // runtime call by hand.
1097 //
1098 __ mov(c_rarg0, r15_thread);
1099 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1100 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1101 __ andptr(rsp, -16); // align stack as required by ABI
1102 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1103 __ mov(rsp, r12); // restore sp
1104 __ reinit_heapbase();
1105 __ bind(Continue);
1106 }
1107
1108 // change thread state
1109 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java);
1110
1111 // reset_last_Java_frame
1112 __ reset_last_Java_frame(true, true);
1113
1114 // reset handle block
1115 __ movptr(t, Address(r15_thread, JavaThread::active_handles_offset()));
1116 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1117
1118 // If result is an oop unbox and store it in frame where gc will see it
1119 // and result handler will pick it up
1120
1121 {
1122 Label no_oop, store_result;
1123 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1124 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1125 __ jcc(Assembler::notEqual, no_oop);
1126 // retrieve result
1127 __ pop(ltos);
1128 __ testptr(rax, rax);
1129 __ jcc(Assembler::zero, store_result);
1130 __ movptr(rax, Address(rax, 0));
1131 __ bind(store_result);
1132 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1133 // keep stack depth as expected by pushing oop which will eventually be discarde
1134 __ push(ltos);
1135 __ bind(no_oop);
1136 }
1137
1138
1139 {
1140 Label no_reguard;
1141 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()),
1142 JavaThread::stack_guard_yellow_disabled);
1143 __ jcc(Assembler::notEqual, no_reguard);
1144
1145 __ pusha(); // XXX only save smashed registers
1146 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1147 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1148 __ andptr(rsp, -16); // align stack as required by ABI
1149 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1150 __ mov(rsp, r12); // restore sp
1151 __ popa(); // XXX only restore smashed registers
1152 __ reinit_heapbase();
1153
1154 __ bind(no_reguard);
1155 }
1156
1157
1158 // The method register is junk from after the thread_in_native transition
1159 // until here. Also can't call_VM until the bcp has been
1160 // restored. Need bcp for throwing exception below so get it now.
1161 __ get_method(method);
1162
1163 // restore r13 to have legal interpreter frame, i.e., bci == 0 <=>
1164 // r13 == code_base()
1165 __ movptr(r13, Address(method, Method::const_offset())); // get ConstMethod*
1166 __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase
1167 // handle exceptions (exception handling will handle unlocking!)
1168 {
1169 Label L;
1170 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1171 __ jcc(Assembler::zero, L);
1172 // Note: At some point we may want to unify this with the code
1173 // used in call_VM_base(); i.e., we should use the
1174 // StubRoutines::forward_exception code. For now this doesn't work
1175 // here because the rsp is not correctly set at this point.
1176 __ MacroAssembler::call_VM(noreg,
1177 CAST_FROM_FN_PTR(address,
1178 InterpreterRuntime::throw_pending_exception));
1179 __ should_not_reach_here();
1180 __ bind(L);
1181 }
1182
1183 // do unlocking if necessary
1184 {
1185 Label L;
1186 __ movl(t, Address(method, Method::access_flags_offset()));
1187 __ testl(t, JVM_ACC_SYNCHRONIZED);
1188 __ jcc(Assembler::zero, L);
1189 // the code below should be shared with interpreter macro
1190 // assembler implementation
1191 {
1192 Label unlock;
1193 // BasicObjectLock will be first in list, since this is a
1194 // synchronized method. However, need to check that the object
1195 // has not been unlocked by an explicit monitorexit bytecode.
1196 const Address monitor(rbp,
1197 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1198 wordSize - sizeof(BasicObjectLock)));
1199
1200 // monitor expect in c_rarg1 for slow unlock path
1201 __ lea(c_rarg1, monitor); // address of first monitor
1202
1203 __ movptr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
1204 __ testptr(t, t);
1205 __ jcc(Assembler::notZero, unlock);
1206
1207 // Entry already unlocked, need to throw exception
1208 __ MacroAssembler::call_VM(noreg,
1209 CAST_FROM_FN_PTR(address,
1210 InterpreterRuntime::throw_illegal_monitor_state_exception));
1211 __ should_not_reach_here();
1212
1213 __ bind(unlock);
1214 __ unlock_object(c_rarg1);
1215 }
1216 __ bind(L);
1217 }
1218
1219 // jvmti support
1220 // Note: This must happen _after_ handling/throwing any exceptions since
1221 // the exception handler code notifies the runtime of method exits
1222 // too. If this happens before, method entry/exit notifications are
1223 // not properly paired (was bug - gri 11/22/99).
1224 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1225
1226 // restore potential result in edx:eax, call result handler to
1227 // restore potential result in ST0 & handle result
1228
1229 __ pop(ltos);
1230 __ pop(dtos);
1231
1232 __ movptr(t, Address(rbp,
1233 (frame::interpreter_frame_result_handler_offset) * wordSize));
1234 __ call(t);
1235
1236 // remove activation
1237 __ movptr(t, Address(rbp,
1238 frame::interpreter_frame_sender_sp_offset *
1239 wordSize)); // get sender sp
1240 __ leave(); // remove frame anchor
1241 __ pop(rdi); // get return address
1242 __ mov(rsp, t); // set sp to sender sp
1243 __ jmp(rdi);
1244
1245 if (inc_counter) {
1246 // Handle overflow of counter and compile method
1247 __ bind(invocation_counter_overflow);
1248 generate_counter_overflow(&continue_after_compile);
1249 }
1250
1251 return entry_point;
1252 }
1253
1254 //
1255 // Generic interpreted method entry to (asm) interpreter
1256 //
1257 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1258 // determine code generation flags
1259 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1260
1261 // ebx: Method*
1262 // r13: sender sp
1263 address entry_point = __ pc();
1264
1265 const Address constMethod(rbx, Method::const_offset());
1266 const Address access_flags(rbx, Method::access_flags_offset());
1267 const Address size_of_parameters(rdx,
1268 ConstMethod::size_of_parameters_offset());
1269 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1270
1271
1272 // get parameter size (always needed)
1273 __ movptr(rdx, constMethod);
1274 __ load_unsigned_short(rcx, size_of_parameters);
1275
1276 // rbx: Method*
1277 // rcx: size of parameters
1278 // r13: sender_sp (could differ from sp+wordSize if we were called via c2i )
1279
1280 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1281 __ subl(rdx, rcx); // rdx = no. of additional locals
1282
1283 // YYY
1284 // __ incrementl(rdx);
1285 // __ andl(rdx, -2);
1286
1287 // see if we've got enough room on the stack for locals plus overhead.
1288 generate_stack_overflow_check();
1289
1290 // get return address
1291 __ pop(rax);
1292
1293 // compute beginning of parameters (r14)
1294 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
1295
1296 // rdx - # of additional locals
1297 // allocate space for locals
1298 // explicitly initialize locals
1299 {
1300 Label exit, loop;
1301 __ testl(rdx, rdx);
1302 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1303 __ bind(loop);
1304 __ push((int) NULL_WORD); // initialize local variables
1305 __ decrementl(rdx); // until everything initialized
1306 __ jcc(Assembler::greater, loop);
1307 __ bind(exit);
1308 }
1309
1310 // initialize fixed part of activation frame
1311 generate_fixed_frame(false);
1312
1313 // make sure method is not native & not abstract
1314 #ifdef ASSERT
1315 __ movl(rax, access_flags);
1316 {
1317 Label L;
1318 __ testl(rax, JVM_ACC_NATIVE);
1319 __ jcc(Assembler::zero, L);
1320 __ stop("tried to execute native method as non-native");
1321 __ bind(L);
1322 }
1323 {
1324 Label L;
1325 __ testl(rax, JVM_ACC_ABSTRACT);
1326 __ jcc(Assembler::zero, L);
1327 __ stop("tried to execute abstract method in interpreter");
1328 __ bind(L);
1329 }
1330 #endif
1331
1332 // Since at this point in the method invocation the exception
1333 // handler would try to exit the monitor of synchronized methods
1334 // which hasn't been entered yet, we set the thread local variable
1335 // _do_not_unlock_if_synchronized to true. The remove_activation
1336 // will check this flag.
1337
1338 const Address do_not_unlock_if_synchronized(r15_thread,
1339 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1340 __ movbool(do_not_unlock_if_synchronized, true);
1341
1342 __ profile_parameters_type(rax, rcx, rdx);
1343 // increment invocation count & check for overflow
1344 Label invocation_counter_overflow;
1345 Label profile_method;
1346 Label profile_method_continue;
1347 if (inc_counter) {
1348 generate_counter_incr(&invocation_counter_overflow,
1349 &profile_method,
1350 &profile_method_continue);
1351 if (ProfileInterpreter) {
1352 __ bind(profile_method_continue);
1353 }
1354 }
1355
1356 Label continue_after_compile;
1357 __ bind(continue_after_compile);
1358
1359 // check for synchronized interpreted methods
1360 bang_stack_shadow_pages(false);
1361
1362 // reset the _do_not_unlock_if_synchronized flag
1363 __ movbool(do_not_unlock_if_synchronized, false);
1364
1365 // check for synchronized methods
1366 // Must happen AFTER invocation_counter check and stack overflow check,
1367 // so method is not locked if overflows.
1368 if (synchronized) {
1369 // Allocate monitor and lock method
1370 lock_method();
1371 } else {
1372 // no synchronization necessary
1373 #ifdef ASSERT
1374 {
1375 Label L;
1376 __ movl(rax, access_flags);
1377 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1378 __ jcc(Assembler::zero, L);
1379 __ stop("method needs synchronization");
1380 __ bind(L);
1381 }
1382 #endif
1383 }
1384
1385 // start execution
1386 #ifdef ASSERT
1387 {
1388 Label L;
1389 const Address monitor_block_top (rbp,
1390 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1391 __ movptr(rax, monitor_block_top);
1392 __ cmpptr(rax, rsp);
1393 __ jcc(Assembler::equal, L);
1394 __ stop("broken stack frame setup in interpreter");
1395 __ bind(L);
1396 }
1397 #endif
1398
1399 // jvmti support
1400 __ notify_method_entry();
1401
1402 __ dispatch_next(vtos);
1403
1404 // invocation counter overflow
1405 if (inc_counter) {
1406 if (ProfileInterpreter) {
1407 // We have decided to profile this method in the interpreter
1408 __ bind(profile_method);
1409 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1410 __ set_method_data_pointer_for_bcp();
1411 __ get_method(rbx);
1412 __ jmp(profile_method_continue);
1413 }
1414 // Handle overflow of counter and compile method
1415 __ bind(invocation_counter_overflow);
1416 generate_counter_overflow(&continue_after_compile);
1417 }
1418
1419 return entry_point;
1420 }
1421
1422
1423 // These should never be compiled since the interpreter will prefer
1424 // the compiled version to the intrinsic version.
1425 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
1426 switch (method_kind(m)) {
1427 case Interpreter::java_lang_math_sin : // fall thru
1428 case Interpreter::java_lang_math_cos : // fall thru
1429 case Interpreter::java_lang_math_tan : // fall thru
1430 case Interpreter::java_lang_math_abs : // fall thru
1431 case Interpreter::java_lang_math_log : // fall thru
1432 case Interpreter::java_lang_math_log10 : // fall thru
1433 case Interpreter::java_lang_math_sqrt : // fall thru
1434 case Interpreter::java_lang_math_pow : // fall thru
1435 case Interpreter::java_lang_math_exp :
1436 return false;
1437 default:
1438 return true;
1439 }
1440 }
1441
1442 // How much stack a method activation needs in words.
1443 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
1444 const int entry_size = frame::interpreter_frame_monitor_size();
1445
1446 // total overhead size: entry_size + (saved rbp thru expr stack
1447 // bottom). be sure to change this if you add/subtract anything
1448 // to/from the overhead area
1449 const int overhead_size =
1450 -(frame::interpreter_frame_initial_sp_offset) + entry_size;
1451
1452 const int stub_code = frame::entry_frame_after_call_words;
1453 const int method_stack = (method->max_locals() + method->max_stack()) *
1454 Interpreter::stackElementWords;
1455 return (overhead_size + method_stack + stub_code);
1456 }
1457
1458 //-----------------------------------------------------------------------------
1459 // Exceptions
1460
1461 void TemplateInterpreterGenerator::generate_throw_exception() {
1462 // Entry point in previous activation (i.e., if the caller was
1463 // interpreted)
1464 Interpreter::_rethrow_exception_entry = __ pc();
1465 // Restore sp to interpreter_frame_last_sp even though we are going
1466 // to empty the expression stack for the exception processing.
1467 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1468 // rax: exception
1469 // rdx: return address/pc that threw exception
1470 __ restore_bcp(); // r13 points to call/send
1471 __ restore_locals();
1472 __ reinit_heapbase(); // restore r12 as heapbase.
1473 // Entry point for exceptions thrown within interpreter code
1474 Interpreter::_throw_exception_entry = __ pc();
1475 // expression stack is undefined here
1476 // rax: exception
1477 // r13: exception bcp
1478 __ verify_oop(rax);
1479 __ mov(c_rarg1, rax);
1480
1481 // expression stack must be empty before entering the VM in case of
1482 // an exception
1483 __ empty_expression_stack();
1484 // find exception handler address and preserve exception oop
1485 __ call_VM(rdx,
1486 CAST_FROM_FN_PTR(address,
1487 InterpreterRuntime::exception_handler_for_exception),
1488 c_rarg1);
1489 // rax: exception handler entry point
1490 // rdx: preserved exception oop
1491 // r13: bcp for exception handler
1492 __ push_ptr(rdx); // push exception which is now the only value on the stack
1493 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1494
1495 // If the exception is not handled in the current frame the frame is
1496 // removed and the exception is rethrown (i.e. exception
1497 // continuation is _rethrow_exception).
1498 //
1499 // Note: At this point the bci is still the bxi for the instruction
1500 // which caused the exception and the expression stack is
1501 // empty. Thus, for any VM calls at this point, GC will find a legal
1502 // oop map (with empty expression stack).
1503
1504 // In current activation
1505 // tos: exception
1506 // esi: exception bcp
1507
1508 //
1509 // JVMTI PopFrame support
1510 //
1511
1512 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1513 __ empty_expression_stack();
1514 // Set the popframe_processing bit in pending_popframe_condition
1515 // indicating that we are currently handling popframe, so that
1516 // call_VMs that may happen later do not trigger new popframe
1517 // handling cycles.
1518 __ movl(rdx, Address(r15_thread, JavaThread::popframe_condition_offset()));
1519 __ orl(rdx, JavaThread::popframe_processing_bit);
1520 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), rdx);
1521
1522 {
1523 // Check to see whether we are returning to a deoptimized frame.
1524 // (The PopFrame call ensures that the caller of the popped frame is
1525 // either interpreted or compiled and deoptimizes it if compiled.)
1526 // In this case, we can't call dispatch_next() after the frame is
1527 // popped, but instead must save the incoming arguments and restore
1528 // them after deoptimization has occurred.
1529 //
1530 // Note that we don't compare the return PC against the
1531 // deoptimization blob's unpack entry because of the presence of
1532 // adapter frames in C2.
1533 Label caller_not_deoptimized;
1534 __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize));
1535 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1536 InterpreterRuntime::interpreter_contains), c_rarg1);
1537 __ testl(rax, rax);
1538 __ jcc(Assembler::notZero, caller_not_deoptimized);
1539
1540 // Compute size of arguments for saving when returning to
1541 // deoptimized caller
1542 __ get_method(rax);
1543 __ movptr(rax, Address(rax, Method::const_offset()));
1544 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1545 size_of_parameters_offset())));
1546 __ shll(rax, Interpreter::logStackElementSize);
1547 __ restore_locals(); // XXX do we need this?
1548 __ subptr(r14, rax);
1549 __ addptr(r14, wordSize);
1550 // Save these arguments
1551 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1552 Deoptimization::
1553 popframe_preserve_args),
1554 r15_thread, rax, r14);
1555
1556 __ remove_activation(vtos, rdx,
1557 /* throw_monitor_exception */ false,
1558 /* install_monitor_exception */ false,
1559 /* notify_jvmdi */ false);
1560
1561 // Inform deoptimization that it is responsible for restoring
1562 // these arguments
1563 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1564 JavaThread::popframe_force_deopt_reexecution_bit);
1565
1566 // Continue in deoptimization handler
1567 __ jmp(rdx);
1568
1569 __ bind(caller_not_deoptimized);
1570 }
1571
1572 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1573 /* throw_monitor_exception */ false,
1574 /* install_monitor_exception */ false,
1575 /* notify_jvmdi */ false);
1576
1577 // Finish with popframe handling
1578 // A previous I2C followed by a deoptimization might have moved the
1579 // outgoing arguments further up the stack. PopFrame expects the
1580 // mutations to those outgoing arguments to be preserved and other
1581 // constraints basically require this frame to look exactly as
1582 // though it had previously invoked an interpreted activation with
1583 // no space between the top of the expression stack (current
1584 // last_sp) and the top of stack. Rather than force deopt to
1585 // maintain this kind of invariant all the time we call a small
1586 // fixup routine to move the mutated arguments onto the top of our
1587 // expression stack if necessary.
1588 __ mov(c_rarg1, rsp);
1589 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1590 // PC must point into interpreter here
1591 __ set_last_Java_frame(noreg, rbp, __ pc());
1592 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1593 __ reset_last_Java_frame(true, true);
1594 // Restore the last_sp and null it out
1595 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1596 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1597
1598 __ restore_bcp(); // XXX do we need this?
1599 __ restore_locals(); // XXX do we need this?
1600 // The method data pointer was incremented already during
1601 // call profiling. We have to restore the mdp for the current bcp.
1602 if (ProfileInterpreter) {
1603 __ set_method_data_pointer_for_bcp();
1604 }
1605
1606 // Clear the popframe condition flag
1607 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1608 JavaThread::popframe_inactive);
1609
1610 #if INCLUDE_JVMTI
1611 {
1612 Label L_done;
1613 const Register local0 = r14;
1614
1615 __ cmpb(Address(r13, 0), Bytecodes::_invokestatic);
1616 __ jcc(Assembler::notEqual, L_done);
1617
1618 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1619 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1620
1621 __ get_method(rdx);
1622 __ movptr(rax, Address(local0, 0));
1623 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, r13);
1624
1625 __ testptr(rax, rax);
1626 __ jcc(Assembler::zero, L_done);
1627
1628 __ movptr(Address(rbx, 0), rax);
1629 __ bind(L_done);
1630 }
1631 #endif // INCLUDE_JVMTI
1632
1633 __ dispatch_next(vtos);
1634 // end of PopFrame support
1635
1636 Interpreter::_remove_activation_entry = __ pc();
1637
1638 // preserve exception over this code sequence
1639 __ pop_ptr(rax);
1640 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), rax);
1641 // remove the activation (without doing throws on illegalMonitorExceptions)
1642 __ remove_activation(vtos, rdx, false, true, false);
1643 // restore exception
1644 __ get_vm_result(rax, r15_thread);
1645
1646 // In between activations - previous activation type unknown yet
1647 // compute continuation point - the continuation point expects the
1648 // following registers set up:
1649 //
1650 // rax: exception
1651 // rdx: return address/pc that threw exception
1652 // rsp: expression stack of caller
1653 // rbp: ebp of caller
1654 __ push(rax); // save exception
1655 __ push(rdx); // save return address
1656 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1657 SharedRuntime::exception_handler_for_return_address),
1658 r15_thread, rdx);
1659 __ mov(rbx, rax); // save exception handler
1660 __ pop(rdx); // restore return address
1661 __ pop(rax); // restore exception
1662 // Note that an "issuing PC" is actually the next PC after the call
1663 __ jmp(rbx); // jump to exception
1664 // handler of caller
1665 }
1666
1667
1668 //
1669 // JVMTI ForceEarlyReturn support
1670 //
1671 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1672 address entry = __ pc();
1673
1674 __ restore_bcp();
1675 __ restore_locals();
1676 __ empty_expression_stack();
1677 __ load_earlyret_value(state);
1678
1679 __ movptr(rdx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
1680 Address cond_addr(rdx, JvmtiThreadState::earlyret_state_offset());
1681
1682 // Clear the earlyret state
1683 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1684
1685 __ remove_activation(state, rsi,
1686 false, /* throw_monitor_exception */
1687 false, /* install_monitor_exception */
1688 true); /* notify_jvmdi */
1689 __ jmp(rsi);
1690
1691 return entry;
1692 } // end of ForceEarlyReturn support
1693
1694
1695 //-----------------------------------------------------------------------------
1696 // Helper for vtos entry point generation
1697
1698 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1699 address& bep,
1700 address& cep,
1701 address& sep,
1702 address& aep,
1703 address& iep,
1704 address& lep,
1705 address& fep,
1706 address& dep,
1707 address& vep) {
1708 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1709 Label L;
1710 aep = __ pc(); __ push_ptr(); __ jmp(L);
1711 fep = __ pc(); __ push_f(xmm0); __ jmp(L);
1712 dep = __ pc(); __ push_d(xmm0); __ jmp(L);
1713 lep = __ pc(); __ push_l(); __ jmp(L);
1714 bep = cep = sep =
1715 iep = __ pc(); __ push_i();
1716 vep = __ pc();
1717 __ bind(L);
1718 generate_and_dispatch(t);
1719 }
1720
1721
1722 //-----------------------------------------------------------------------------
1723 // Generation of individual instructions
1724
1725 // helpers for generate_and_dispatch
1726
1727
1728 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1729 : TemplateInterpreterGenerator(code) {
1730 generate_all(); // down here so it can be "virtual"
1731 }
1732
1733 //-----------------------------------------------------------------------------
1734
1735 // Non-product code
1736 #ifndef PRODUCT
1737 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1738 address entry = __ pc();
1739
1740 __ push(state);
1741 __ push(c_rarg0);
1742 __ push(c_rarg1);
1743 __ push(c_rarg2);
1744 __ push(c_rarg3);
1745 __ mov(c_rarg2, rax); // Pass itos
1746 #ifdef _WIN64
1747 __ movflt(xmm3, xmm0); // Pass ftos
1748 #endif
1749 __ call_VM(noreg,
1750 CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode),
1751 c_rarg1, c_rarg2, c_rarg3);
1752 __ pop(c_rarg3);
1753 __ pop(c_rarg2);
1754 __ pop(c_rarg1);
1755 __ pop(c_rarg0);
1756 __ pop(state);
1757 __ ret(0); // return from result handler
1758
1759 return entry;
1760 }
1761
1762 void TemplateInterpreterGenerator::count_bytecode() {
1763 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1764 }
1765
1766 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1767 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1768 }
1769
1770 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1771 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1772 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1773 __ orl(rbx,
1774 ((int) t->bytecode()) <<
1775 BytecodePairHistogram::log2_number_of_codes);
1776 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1777 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1778 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1779 }
1780
1781
1782 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1783 // Call a little run-time stub to avoid blow-up for each bytecode.
1784 // The run-time runtime saves the right registers, depending on
1785 // the tosca in-state for the given template.
1786
1787 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1788 "entry must have been generated");
1789 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1790 __ andptr(rsp, -16); // align stack as required by ABI
1791 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1792 __ mov(rsp, r12); // restore sp
1793 __ reinit_heapbase();
1794 }
1795
1796
1797 void TemplateInterpreterGenerator::stop_interpreter_at() {
1798 Label L;
1799 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1800 StopInterpreterAt);
1801 __ jcc(Assembler::notEqual, L);
1802 __ int3();
1803 __ bind(L);
1804 }
1805 #endif // !PRODUCT
1806 #endif // ! CC_INTERP