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src/cpu/x86/vm/templateInterpreter_x86_64.cpp@323bd24c6520
src/cpu/x86/vm/templateInterpreter_x86_64.cpp
Mon, 02 Nov 2009 11:17:55 +0100
- author
- roland
- date
- Mon, 02 Nov 2009 11:17:55 +0100
- changeset 1495
- 323bd24c6520
- parent 1494
- 389049f3f393
- child 1543
- 85f13cdfbc1d
- permissions
- -rw-r--r--
6769124: various 64-bit fixes for c1
Reviewed-by: never
1 /*
2 * Copyright 2003-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_interpreter_x86_64.cpp.incl"
28 #define __ _masm->
30 #ifndef CC_INTERP
32 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
33 const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize;
34 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
36 //-----------------------------------------------------------------------------
38 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
39 address entry = __ pc();
41 #ifdef ASSERT
42 {
43 Label L;
44 __ lea(rax, Address(rbp,
45 frame::interpreter_frame_monitor_block_top_offset *
46 wordSize));
47 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
48 // grows negative)
49 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
50 __ stop ("interpreter frame not set up");
51 __ bind(L);
52 }
53 #endif // ASSERT
54 // Restore bcp under the assumption that the current frame is still
55 // interpreted
56 __ restore_bcp();
58 // expression stack must be empty before entering the VM if an
59 // exception happened
60 __ empty_expression_stack();
61 // throw exception
62 __ call_VM(noreg,
63 CAST_FROM_FN_PTR(address,
64 InterpreterRuntime::throw_StackOverflowError));
65 return entry;
66 }
68 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
69 const char* name) {
70 address entry = __ pc();
71 // expression stack must be empty before entering the VM if an
72 // exception happened
73 __ empty_expression_stack();
74 // setup parameters
75 // ??? convention: expect aberrant index in register ebx
76 __ lea(c_rarg1, ExternalAddress((address)name));
77 __ call_VM(noreg,
78 CAST_FROM_FN_PTR(address,
79 InterpreterRuntime::
80 throw_ArrayIndexOutOfBoundsException),
81 c_rarg1, rbx);
82 return entry;
83 }
85 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
86 address entry = __ pc();
88 // object is at TOS
89 __ pop(c_rarg1);
91 // expression stack must be empty before entering the VM if an
92 // exception happened
93 __ empty_expression_stack();
95 __ call_VM(noreg,
96 CAST_FROM_FN_PTR(address,
97 InterpreterRuntime::
98 throw_ClassCastException),
99 c_rarg1);
100 return entry;
101 }
103 // Arguments are: required type in rarg1, failing object (or NULL) in rarg2
104 address TemplateInterpreterGenerator::generate_WrongMethodType_handler() {
105 address entry = __ pc();
107 __ pop(c_rarg2); // failing object is at TOS
108 __ pop(c_rarg1); // required type is at TOS+8
110 // expression stack must be empty before entering the VM if an
111 // exception happened
112 __ empty_expression_stack();
114 __ call_VM(noreg,
115 CAST_FROM_FN_PTR(address,
116 InterpreterRuntime::
117 throw_WrongMethodTypeException),
118 // pass required type, failing object (or NULL)
119 c_rarg1, c_rarg2);
120 return entry;
121 }
123 address TemplateInterpreterGenerator::generate_exception_handler_common(
124 const char* name, const char* message, bool pass_oop) {
125 assert(!pass_oop || message == NULL, "either oop or message but not both");
126 address entry = __ pc();
127 if (pass_oop) {
128 // object is at TOS
129 __ pop(c_rarg2);
130 }
131 // expression stack must be empty before entering the VM if an
132 // exception happened
133 __ empty_expression_stack();
134 // setup parameters
135 __ lea(c_rarg1, ExternalAddress((address)name));
136 if (pass_oop) {
137 __ call_VM(rax, CAST_FROM_FN_PTR(address,
138 InterpreterRuntime::
139 create_klass_exception),
140 c_rarg1, c_rarg2);
141 } else {
142 // kind of lame ExternalAddress can't take NULL because
143 // external_word_Relocation will assert.
144 if (message != NULL) {
145 __ lea(c_rarg2, ExternalAddress((address)message));
146 } else {
147 __ movptr(c_rarg2, NULL_WORD);
148 }
149 __ call_VM(rax,
150 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
151 c_rarg1, c_rarg2);
152 }
153 // throw exception
154 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
155 return entry;
156 }
159 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
160 address entry = __ pc();
161 // NULL last_sp until next java call
162 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
163 __ dispatch_next(state);
164 return entry;
165 }
168 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state,
169 int step) {
171 // amd64 doesn't need to do anything special about compiled returns
172 // to the interpreter so the code that exists on x86 to place a sentinel
173 // here and the specialized cleanup code is not needed here.
175 address entry = __ pc();
177 // Restore stack bottom in case i2c adjusted stack
178 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
179 // and NULL it as marker that esp is now tos until next java call
180 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
182 __ restore_bcp();
183 __ restore_locals();
185 __ get_cache_and_index_at_bcp(rbx, rcx, 1);
186 __ movl(rbx, Address(rbx, rcx,
187 Address::times_8,
188 in_bytes(constantPoolCacheOopDesc::base_offset()) +
189 3 * wordSize));
190 __ andl(rbx, 0xFF);
191 if (TaggedStackInterpreter) __ shll(rbx, 1); // 2 slots per parameter.
192 __ lea(rsp, Address(rsp, rbx, Address::times_8));
193 __ dispatch_next(state, step);
194 return entry;
195 }
198 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
199 int step) {
200 address entry = __ pc();
201 // NULL last_sp until next java call
202 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
203 __ restore_bcp();
204 __ restore_locals();
205 // handle exceptions
206 {
207 Label L;
208 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
209 __ jcc(Assembler::zero, L);
210 __ call_VM(noreg,
211 CAST_FROM_FN_PTR(address,
212 InterpreterRuntime::throw_pending_exception));
213 __ should_not_reach_here();
214 __ bind(L);
215 }
216 __ dispatch_next(state, step);
217 return entry;
218 }
220 int AbstractInterpreter::BasicType_as_index(BasicType type) {
221 int i = 0;
222 switch (type) {
223 case T_BOOLEAN: i = 0; break;
224 case T_CHAR : i = 1; break;
225 case T_BYTE : i = 2; break;
226 case T_SHORT : i = 3; break;
227 case T_INT : i = 4; break;
228 case T_LONG : i = 5; break;
229 case T_VOID : i = 6; break;
230 case T_FLOAT : i = 7; break;
231 case T_DOUBLE : i = 8; break;
232 case T_OBJECT : i = 9; break;
233 case T_ARRAY : i = 9; break;
234 default : ShouldNotReachHere();
235 }
236 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
237 "index out of bounds");
238 return i;
239 }
242 address TemplateInterpreterGenerator::generate_result_handler_for(
243 BasicType type) {
244 address entry = __ pc();
245 switch (type) {
246 case T_BOOLEAN: __ c2bool(rax); break;
247 case T_CHAR : __ movzwl(rax, rax); break;
248 case T_BYTE : __ sign_extend_byte(rax); break;
249 case T_SHORT : __ sign_extend_short(rax); break;
250 case T_INT : /* nothing to do */ break;
251 case T_LONG : /* nothing to do */ break;
252 case T_VOID : /* nothing to do */ break;
253 case T_FLOAT : /* nothing to do */ break;
254 case T_DOUBLE : /* nothing to do */ break;
255 case T_OBJECT :
256 // retrieve result from frame
257 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
258 // and verify it
259 __ verify_oop(rax);
260 break;
261 default : ShouldNotReachHere();
262 }
263 __ ret(0); // return from result handler
264 return entry;
265 }
267 address TemplateInterpreterGenerator::generate_safept_entry_for(
268 TosState state,
269 address runtime_entry) {
270 address entry = __ pc();
271 __ push(state);
272 __ call_VM(noreg, runtime_entry);
273 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
274 return entry;
275 }
279 // Helpers for commoning out cases in the various type of method entries.
280 //
283 // increment invocation count & check for overflow
284 //
285 // Note: checking for negative value instead of overflow
286 // so we have a 'sticky' overflow test
287 //
288 // rbx: method
289 // ecx: invocation counter
290 //
291 void InterpreterGenerator::generate_counter_incr(
292 Label* overflow,
293 Label* profile_method,
294 Label* profile_method_continue) {
296 const Address invocation_counter(rbx,
297 methodOopDesc::invocation_counter_offset() +
298 InvocationCounter::counter_offset());
299 const Address backedge_counter(rbx,
300 methodOopDesc::backedge_counter_offset() +
301 InvocationCounter::counter_offset());
303 if (ProfileInterpreter) { // %%% Merge this into methodDataOop
304 __ incrementl(Address(rbx,
305 methodOopDesc::interpreter_invocation_counter_offset()));
306 }
307 // Update standard invocation counters
308 __ movl(rax, backedge_counter); // load backedge counter
310 __ incrementl(rcx, InvocationCounter::count_increment);
311 __ andl(rax, InvocationCounter::count_mask_value); // mask out the
312 // status bits
314 __ movl(invocation_counter, rcx); // save invocation count
315 __ addl(rcx, rax); // add both counters
317 // profile_method is non-null only for interpreted method so
318 // profile_method != NULL == !native_call
320 if (ProfileInterpreter && profile_method != NULL) {
321 // Test to see if we should create a method data oop
322 __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));
323 __ jcc(Assembler::less, *profile_method_continue);
325 // if no method data exists, go to profile_method
326 __ test_method_data_pointer(rax, *profile_method);
327 }
329 __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));
330 __ jcc(Assembler::aboveEqual, *overflow);
331 }
333 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
335 // Asm interpreter on entry
336 // r14 - locals
337 // r13 - bcp
338 // rbx - method
339 // edx - cpool --- DOES NOT APPEAR TO BE TRUE
340 // rbp - interpreter frame
342 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
343 // Everything as it was on entry
344 // rdx is not restored. Doesn't appear to really be set.
346 const Address size_of_parameters(rbx,
347 methodOopDesc::size_of_parameters_offset());
349 // InterpreterRuntime::frequency_counter_overflow takes two
350 // arguments, the first (thread) is passed by call_VM, the second
351 // indicates if the counter overflow occurs at a backwards branch
352 // (NULL bcp). We pass zero for it. The call returns the address
353 // of the verified entry point for the method or NULL if the
354 // compilation did not complete (either went background or bailed
355 // out).
356 __ movl(c_rarg1, 0);
357 __ call_VM(noreg,
358 CAST_FROM_FN_PTR(address,
359 InterpreterRuntime::frequency_counter_overflow),
360 c_rarg1);
362 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop
363 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
364 // and jump to the interpreted entry.
365 __ jmp(*do_continue, relocInfo::none);
366 }
368 // See if we've got enough room on the stack for locals plus overhead.
369 // The expression stack grows down incrementally, so the normal guard
370 // page mechanism will work for that.
371 //
372 // NOTE: Since the additional locals are also always pushed (wasn't
373 // obvious in generate_method_entry) so the guard should work for them
374 // too.
375 //
376 // Args:
377 // rdx: number of additional locals this frame needs (what we must check)
378 // rbx: methodOop
379 //
380 // Kills:
381 // rax
382 void InterpreterGenerator::generate_stack_overflow_check(void) {
384 // monitor entry size: see picture of stack set
385 // (generate_method_entry) and frame_amd64.hpp
386 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
388 // total overhead size: entry_size + (saved rbp through expr stack
389 // bottom). be sure to change this if you add/subtract anything
390 // to/from the overhead area
391 const int overhead_size =
392 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
394 const int page_size = os::vm_page_size();
396 Label after_frame_check;
398 // see if the frame is greater than one page in size. If so,
399 // then we need to verify there is enough stack space remaining
400 // for the additional locals.
401 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize());
402 __ jcc(Assembler::belowEqual, after_frame_check);
404 // compute rsp as if this were going to be the last frame on
405 // the stack before the red zone
407 const Address stack_base(r15_thread, Thread::stack_base_offset());
408 const Address stack_size(r15_thread, Thread::stack_size_offset());
410 // locals + overhead, in bytes
411 __ mov(rax, rdx);
412 __ shlptr(rax, Interpreter::logStackElementSize()); // 2 slots per parameter.
413 __ addptr(rax, overhead_size);
415 #ifdef ASSERT
416 Label stack_base_okay, stack_size_okay;
417 // verify that thread stack base is non-zero
418 __ cmpptr(stack_base, (int32_t)NULL_WORD);
419 __ jcc(Assembler::notEqual, stack_base_okay);
420 __ stop("stack base is zero");
421 __ bind(stack_base_okay);
422 // verify that thread stack size is non-zero
423 __ cmpptr(stack_size, 0);
424 __ jcc(Assembler::notEqual, stack_size_okay);
425 __ stop("stack size is zero");
426 __ bind(stack_size_okay);
427 #endif
429 // Add stack base to locals and subtract stack size
430 __ addptr(rax, stack_base);
431 __ subptr(rax, stack_size);
433 // add in the red and yellow zone sizes
434 __ addptr(rax, (StackRedPages + StackYellowPages) * page_size);
436 // check against the current stack bottom
437 __ cmpptr(rsp, rax);
438 __ jcc(Assembler::above, after_frame_check);
440 __ pop(rax); // get return address
441 __ jump(ExternalAddress(Interpreter::throw_StackOverflowError_entry()));
443 // all done with frame size check
444 __ bind(after_frame_check);
445 }
447 // Allocate monitor and lock method (asm interpreter)
448 //
449 // Args:
450 // rbx: methodOop
451 // r14: locals
452 //
453 // Kills:
454 // rax
455 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
456 // rscratch1, rscratch2 (scratch regs)
457 void InterpreterGenerator::lock_method(void) {
458 // synchronize method
459 const Address access_flags(rbx, methodOopDesc::access_flags_offset());
460 const Address monitor_block_top(
461 rbp,
462 frame::interpreter_frame_monitor_block_top_offset * wordSize);
463 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
465 #ifdef ASSERT
466 {
467 Label L;
468 __ movl(rax, access_flags);
469 __ testl(rax, JVM_ACC_SYNCHRONIZED);
470 __ jcc(Assembler::notZero, L);
471 __ stop("method doesn't need synchronization");
472 __ bind(L);
473 }
474 #endif // ASSERT
476 // get synchronization object
477 {
478 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() +
479 Klass::java_mirror_offset_in_bytes();
480 Label done;
481 __ movl(rax, access_flags);
482 __ testl(rax, JVM_ACC_STATIC);
483 // get receiver (assume this is frequent case)
484 __ movptr(rax, Address(r14, Interpreter::local_offset_in_bytes(0)));
485 __ jcc(Assembler::zero, done);
486 __ movptr(rax, Address(rbx, methodOopDesc::constants_offset()));
487 __ movptr(rax, Address(rax,
488 constantPoolOopDesc::pool_holder_offset_in_bytes()));
489 __ movptr(rax, Address(rax, mirror_offset));
491 #ifdef ASSERT
492 {
493 Label L;
494 __ testptr(rax, rax);
495 __ jcc(Assembler::notZero, L);
496 __ stop("synchronization object is NULL");
497 __ bind(L);
498 }
499 #endif // ASSERT
501 __ bind(done);
502 }
504 // add space for monitor & lock
505 __ subptr(rsp, entry_size); // add space for a monitor entry
506 __ movptr(monitor_block_top, rsp); // set new monitor block top
507 // store object
508 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
509 __ movptr(c_rarg1, rsp); // object address
510 __ lock_object(c_rarg1);
511 }
513 // Generate a fixed interpreter frame. This is identical setup for
514 // interpreted methods and for native methods hence the shared code.
515 //
516 // Args:
517 // rax: return address
518 // rbx: methodOop
519 // r14: pointer to locals
520 // r13: sender sp
521 // rdx: cp cache
522 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
523 // initialize fixed part of activation frame
524 __ push(rax); // save return address
525 __ enter(); // save old & set new rbp
526 __ push(r13); // set sender sp
527 __ push((int)NULL_WORD); // leave last_sp as null
528 __ movptr(r13, Address(rbx, methodOopDesc::const_offset())); // get constMethodOop
529 __ lea(r13, Address(r13, constMethodOopDesc::codes_offset())); // get codebase
530 __ push(rbx); // save methodOop
531 if (ProfileInterpreter) {
532 Label method_data_continue;
533 __ movptr(rdx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
534 __ testptr(rdx, rdx);
535 __ jcc(Assembler::zero, method_data_continue);
536 __ addptr(rdx, in_bytes(methodDataOopDesc::data_offset()));
537 __ bind(method_data_continue);
538 __ push(rdx); // set the mdp (method data pointer)
539 } else {
540 __ push(0);
541 }
543 __ movptr(rdx, Address(rbx, methodOopDesc::constants_offset()));
544 __ movptr(rdx, Address(rdx, constantPoolOopDesc::cache_offset_in_bytes()));
545 __ push(rdx); // set constant pool cache
546 __ push(r14); // set locals pointer
547 if (native_call) {
548 __ push(0); // no bcp
549 } else {
550 __ push(r13); // set bcp
551 }
552 __ push(0); // reserve word for pointer to expression stack bottom
553 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
554 }
556 // End of helpers
558 // Various method entries
559 //------------------------------------------------------------------------------------------------------------------------
560 //
561 //
563 // Call an accessor method (assuming it is resolved, otherwise drop
564 // into vanilla (slow path) entry
565 address InterpreterGenerator::generate_accessor_entry(void) {
566 // rbx: methodOop
568 // r13: senderSP must preserver for slow path, set SP to it on fast path
570 address entry_point = __ pc();
571 Label xreturn_path;
573 // do fastpath for resolved accessor methods
574 if (UseFastAccessorMethods) {
575 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites
576 // thereof; parameter size = 1
577 // Note: We can only use this code if the getfield has been resolved
578 // and if we don't have a null-pointer exception => check for
579 // these conditions first and use slow path if necessary.
580 Label slow_path;
581 // If we need a safepoint check, generate full interpreter entry.
582 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
583 SafepointSynchronize::_not_synchronized);
585 __ jcc(Assembler::notEqual, slow_path);
586 // rbx: method
587 __ movptr(rax, Address(rsp, wordSize));
589 // check if local 0 != NULL and read field
590 __ testptr(rax, rax);
591 __ jcc(Assembler::zero, slow_path);
593 __ movptr(rdi, Address(rbx, methodOopDesc::constants_offset()));
594 // read first instruction word and extract bytecode @ 1 and index @ 2
595 __ movptr(rdx, Address(rbx, methodOopDesc::const_offset()));
596 __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
597 // Shift codes right to get the index on the right.
598 // The bytecode fetched looks like <index><0xb4><0x2a>
599 __ shrl(rdx, 2 * BitsPerByte);
600 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
601 __ movptr(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes()));
603 // rax: local 0
604 // rbx: method
605 // rdx: constant pool cache index
606 // rdi: constant pool cache
608 // check if getfield has been resolved and read constant pool cache entry
609 // check the validity of the cache entry by testing whether _indices field
610 // contains Bytecode::_getfield in b1 byte.
611 assert(in_words(ConstantPoolCacheEntry::size()) == 4,
612 "adjust shift below");
613 __ movl(rcx,
614 Address(rdi,
615 rdx,
616 Address::times_8,
617 constantPoolCacheOopDesc::base_offset() +
618 ConstantPoolCacheEntry::indices_offset()));
619 __ shrl(rcx, 2 * BitsPerByte);
620 __ andl(rcx, 0xFF);
621 __ cmpl(rcx, Bytecodes::_getfield);
622 __ jcc(Assembler::notEqual, slow_path);
624 // Note: constant pool entry is not valid before bytecode is resolved
625 __ movptr(rcx,
626 Address(rdi,
627 rdx,
628 Address::times_8,
629 constantPoolCacheOopDesc::base_offset() +
630 ConstantPoolCacheEntry::f2_offset()));
631 // edx: flags
632 __ movl(rdx,
633 Address(rdi,
634 rdx,
635 Address::times_8,
636 constantPoolCacheOopDesc::base_offset() +
637 ConstantPoolCacheEntry::flags_offset()));
639 Label notObj, notInt, notByte, notShort;
640 const Address field_address(rax, rcx, Address::times_1);
642 // Need to differentiate between igetfield, agetfield, bgetfield etc.
643 // because they are different sizes.
644 // Use the type from the constant pool cache
645 __ shrl(rdx, ConstantPoolCacheEntry::tosBits);
646 // Make sure we don't need to mask edx for tosBits after the above shift
647 ConstantPoolCacheEntry::verify_tosBits();
649 __ cmpl(rdx, atos);
650 __ jcc(Assembler::notEqual, notObj);
651 // atos
652 __ load_heap_oop(rax, field_address);
653 __ jmp(xreturn_path);
655 __ bind(notObj);
656 __ cmpl(rdx, itos);
657 __ jcc(Assembler::notEqual, notInt);
658 // itos
659 __ movl(rax, field_address);
660 __ jmp(xreturn_path);
662 __ bind(notInt);
663 __ cmpl(rdx, btos);
664 __ jcc(Assembler::notEqual, notByte);
665 // btos
666 __ load_signed_byte(rax, field_address);
667 __ jmp(xreturn_path);
669 __ bind(notByte);
670 __ cmpl(rdx, stos);
671 __ jcc(Assembler::notEqual, notShort);
672 // stos
673 __ load_signed_short(rax, field_address);
674 __ jmp(xreturn_path);
676 __ bind(notShort);
677 #ifdef ASSERT
678 Label okay;
679 __ cmpl(rdx, ctos);
680 __ jcc(Assembler::equal, okay);
681 __ stop("what type is this?");
682 __ bind(okay);
683 #endif
684 // ctos
685 __ load_unsigned_short(rax, field_address);
687 __ bind(xreturn_path);
689 // _ireturn/_areturn
690 __ pop(rdi);
691 __ mov(rsp, r13);
692 __ jmp(rdi);
693 __ ret(0);
695 // generate a vanilla interpreter entry as the slow path
696 __ bind(slow_path);
697 (void) generate_normal_entry(false);
698 } else {
699 (void) generate_normal_entry(false);
700 }
702 return entry_point;
703 }
705 // Interpreter stub for calling a native method. (asm interpreter)
706 // This sets up a somewhat different looking stack for calling the
707 // native method than the typical interpreter frame setup.
708 address InterpreterGenerator::generate_native_entry(bool synchronized) {
709 // determine code generation flags
710 bool inc_counter = UseCompiler || CountCompiledCalls;
712 // rbx: methodOop
713 // r13: sender sp
715 address entry_point = __ pc();
717 const Address size_of_parameters(rbx, methodOopDesc::
718 size_of_parameters_offset());
719 const Address invocation_counter(rbx, methodOopDesc::
720 invocation_counter_offset() +
721 InvocationCounter::counter_offset());
722 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
724 // get parameter size (always needed)
725 __ load_unsigned_short(rcx, size_of_parameters);
727 // native calls don't need the stack size check since they have no
728 // expression stack and the arguments are already on the stack and
729 // we only add a handful of words to the stack
731 // rbx: methodOop
732 // rcx: size of parameters
733 // r13: sender sp
734 __ pop(rax); // get return address
736 // for natives the size of locals is zero
738 // compute beginning of parameters (r14)
739 if (TaggedStackInterpreter) __ shll(rcx, 1); // 2 slots per parameter.
740 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
742 // add 2 zero-initialized slots for native calls
743 // initialize result_handler slot
744 __ push((int) NULL_WORD);
745 // slot for oop temp
746 // (static native method holder mirror/jni oop result)
747 __ push((int) NULL_WORD);
749 if (inc_counter) {
750 __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
751 }
753 // initialize fixed part of activation frame
754 generate_fixed_frame(true);
756 // make sure method is native & not abstract
757 #ifdef ASSERT
758 __ movl(rax, access_flags);
759 {
760 Label L;
761 __ testl(rax, JVM_ACC_NATIVE);
762 __ jcc(Assembler::notZero, L);
763 __ stop("tried to execute non-native method as native");
764 __ bind(L);
765 }
766 {
767 Label L;
768 __ testl(rax, JVM_ACC_ABSTRACT);
769 __ jcc(Assembler::zero, L);
770 __ stop("tried to execute abstract method in interpreter");
771 __ bind(L);
772 }
773 #endif
775 // Since at this point in the method invocation the exception handler
776 // would try to exit the monitor of synchronized methods which hasn't
777 // been entered yet, we set the thread local variable
778 // _do_not_unlock_if_synchronized to true. The remove_activation will
779 // check this flag.
781 const Address do_not_unlock_if_synchronized(r15_thread,
782 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
783 __ movbool(do_not_unlock_if_synchronized, true);
785 // increment invocation count & check for overflow
786 Label invocation_counter_overflow;
787 if (inc_counter) {
788 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
789 }
791 Label continue_after_compile;
792 __ bind(continue_after_compile);
794 bang_stack_shadow_pages(true);
796 // reset the _do_not_unlock_if_synchronized flag
797 __ movbool(do_not_unlock_if_synchronized, false);
799 // check for synchronized methods
800 // Must happen AFTER invocation_counter check and stack overflow check,
801 // so method is not locked if overflows.
802 if (synchronized) {
803 lock_method();
804 } else {
805 // no synchronization necessary
806 #ifdef ASSERT
807 {
808 Label L;
809 __ movl(rax, access_flags);
810 __ testl(rax, JVM_ACC_SYNCHRONIZED);
811 __ jcc(Assembler::zero, L);
812 __ stop("method needs synchronization");
813 __ bind(L);
814 }
815 #endif
816 }
818 // start execution
819 #ifdef ASSERT
820 {
821 Label L;
822 const Address monitor_block_top(rbp,
823 frame::interpreter_frame_monitor_block_top_offset * wordSize);
824 __ movptr(rax, monitor_block_top);
825 __ cmpptr(rax, rsp);
826 __ jcc(Assembler::equal, L);
827 __ stop("broken stack frame setup in interpreter");
828 __ bind(L);
829 }
830 #endif
832 // jvmti support
833 __ notify_method_entry();
835 // work registers
836 const Register method = rbx;
837 const Register t = r11;
839 // allocate space for parameters
840 __ get_method(method);
841 __ verify_oop(method);
842 __ load_unsigned_short(t,
843 Address(method,
844 methodOopDesc::size_of_parameters_offset()));
845 __ shll(t, Interpreter::logStackElementSize());
847 __ subptr(rsp, t);
848 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
849 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
851 // get signature handler
852 {
853 Label L;
854 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));
855 __ testptr(t, t);
856 __ jcc(Assembler::notZero, L);
857 __ call_VM(noreg,
858 CAST_FROM_FN_PTR(address,
859 InterpreterRuntime::prepare_native_call),
860 method);
861 __ get_method(method);
862 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));
863 __ bind(L);
864 }
866 // call signature handler
867 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == r14,
868 "adjust this code");
869 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
870 "adjust this code");
871 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
872 "adjust this code");
874 // The generated handlers do not touch RBX (the method oop).
875 // However, large signatures cannot be cached and are generated
876 // each time here. The slow-path generator can do a GC on return,
877 // so we must reload it after the call.
878 __ call(t);
879 __ get_method(method); // slow path can do a GC, reload RBX
882 // result handler is in rax
883 // set result handler
884 __ movptr(Address(rbp,
885 (frame::interpreter_frame_result_handler_offset) * wordSize),
886 rax);
888 // pass mirror handle if static call
889 {
890 Label L;
891 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() +
892 Klass::java_mirror_offset_in_bytes();
893 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
894 __ testl(t, JVM_ACC_STATIC);
895 __ jcc(Assembler::zero, L);
896 // get mirror
897 __ movptr(t, Address(method, methodOopDesc::constants_offset()));
898 __ movptr(t, Address(t, constantPoolOopDesc::pool_holder_offset_in_bytes()));
899 __ movptr(t, Address(t, mirror_offset));
900 // copy mirror into activation frame
901 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
902 t);
903 // pass handle to mirror
904 __ lea(c_rarg1,
905 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
906 __ bind(L);
907 }
909 // get native function entry point
910 {
911 Label L;
912 __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));
913 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
914 __ movptr(rscratch2, unsatisfied.addr());
915 __ cmpptr(rax, rscratch2);
916 __ jcc(Assembler::notEqual, L);
917 __ call_VM(noreg,
918 CAST_FROM_FN_PTR(address,
919 InterpreterRuntime::prepare_native_call),
920 method);
921 __ get_method(method);
922 __ verify_oop(method);
923 __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));
924 __ bind(L);
925 }
927 // pass JNIEnv
928 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
930 // It is enough that the pc() points into the right code
931 // segment. It does not have to be the correct return pc.
932 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
934 // change thread state
935 #ifdef ASSERT
936 {
937 Label L;
938 __ movl(t, Address(r15_thread, JavaThread::thread_state_offset()));
939 __ cmpl(t, _thread_in_Java);
940 __ jcc(Assembler::equal, L);
941 __ stop("Wrong thread state in native stub");
942 __ bind(L);
943 }
944 #endif
946 // Change state to native
948 __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
949 _thread_in_native);
951 // Call the native method.
952 __ call(rax);
953 // result potentially in rax or xmm0
955 // Depending on runtime options, either restore the MXCSR
956 // register after returning from the JNI Call or verify that
957 // it wasn't changed during -Xcheck:jni.
958 if (RestoreMXCSROnJNICalls) {
959 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std()));
960 }
961 else if (CheckJNICalls) {
962 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::verify_mxcsr_entry())));
963 }
965 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
966 // in order to extract the result of a method call. If the order of these
967 // pushes change or anything else is added to the stack then the code in
968 // interpreter_frame_result must also change.
970 __ push(dtos);
971 __ push(ltos);
973 // change thread state
974 __ movl(Address(r15_thread, JavaThread::thread_state_offset()),
975 _thread_in_native_trans);
977 if (os::is_MP()) {
978 if (UseMembar) {
979 // Force this write out before the read below
980 __ membar(Assembler::Membar_mask_bits(
981 Assembler::LoadLoad | Assembler::LoadStore |
982 Assembler::StoreLoad | Assembler::StoreStore));
983 } else {
984 // Write serialization page so VM thread can do a pseudo remote membar.
985 // We use the current thread pointer to calculate a thread specific
986 // offset to write to within the page. This minimizes bus traffic
987 // due to cache line collision.
988 __ serialize_memory(r15_thread, rscratch2);
989 }
990 }
992 // check for safepoint operation in progress and/or pending suspend requests
993 {
994 Label Continue;
995 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
996 SafepointSynchronize::_not_synchronized);
998 Label L;
999 __ jcc(Assembler::notEqual, L);
1000 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0);
1001 __ jcc(Assembler::equal, Continue);
1002 __ bind(L);
1004 // Don't use call_VM as it will see a possible pending exception
1005 // and forward it and never return here preventing us from
1006 // clearing _last_native_pc down below. Also can't use
1007 // call_VM_leaf either as it will check to see if r13 & r14 are
1008 // preserved and correspond to the bcp/locals pointers. So we do a
1009 // runtime call by hand.
1010 //
1011 __ mov(c_rarg0, r15_thread);
1012 __ mov(r12, rsp); // remember sp
1013 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1014 __ andptr(rsp, -16); // align stack as required by ABI
1015 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1016 __ mov(rsp, r12); // restore sp
1017 __ reinit_heapbase();
1018 __ bind(Continue);
1019 }
1021 // change thread state
1022 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java);
1024 // reset_last_Java_frame
1025 __ reset_last_Java_frame(true, true);
1027 // reset handle block
1028 __ movptr(t, Address(r15_thread, JavaThread::active_handles_offset()));
1029 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1031 // If result is an oop unbox and store it in frame where gc will see it
1032 // and result handler will pick it up
1034 {
1035 Label no_oop, store_result;
1036 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1037 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1038 __ jcc(Assembler::notEqual, no_oop);
1039 // retrieve result
1040 __ pop(ltos);
1041 __ testptr(rax, rax);
1042 __ jcc(Assembler::zero, store_result);
1043 __ movptr(rax, Address(rax, 0));
1044 __ bind(store_result);
1045 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1046 // keep stack depth as expected by pushing oop which will eventually be discarde
1047 __ push(ltos);
1048 __ bind(no_oop);
1049 }
1052 {
1053 Label no_reguard;
1054 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()),
1055 JavaThread::stack_guard_yellow_disabled);
1056 __ jcc(Assembler::notEqual, no_reguard);
1058 __ pusha(); // XXX only save smashed registers
1059 __ mov(r12, rsp); // remember sp
1060 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1061 __ andptr(rsp, -16); // align stack as required by ABI
1062 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1063 __ mov(rsp, r12); // restore sp
1064 __ popa(); // XXX only restore smashed registers
1065 __ reinit_heapbase();
1067 __ bind(no_reguard);
1068 }
1071 // The method register is junk from after the thread_in_native transition
1072 // until here. Also can't call_VM until the bcp has been
1073 // restored. Need bcp for throwing exception below so get it now.
1074 __ get_method(method);
1075 __ verify_oop(method);
1077 // restore r13 to have legal interpreter frame, i.e., bci == 0 <=>
1078 // r13 == code_base()
1079 __ movptr(r13, Address(method, methodOopDesc::const_offset())); // get constMethodOop
1080 __ lea(r13, Address(r13, constMethodOopDesc::codes_offset())); // get codebase
1081 // handle exceptions (exception handling will handle unlocking!)
1082 {
1083 Label L;
1084 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1085 __ jcc(Assembler::zero, L);
1086 // Note: At some point we may want to unify this with the code
1087 // used in call_VM_base(); i.e., we should use the
1088 // StubRoutines::forward_exception code. For now this doesn't work
1089 // here because the rsp is not correctly set at this point.
1090 __ MacroAssembler::call_VM(noreg,
1091 CAST_FROM_FN_PTR(address,
1092 InterpreterRuntime::throw_pending_exception));
1093 __ should_not_reach_here();
1094 __ bind(L);
1095 }
1097 // do unlocking if necessary
1098 {
1099 Label L;
1100 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
1101 __ testl(t, JVM_ACC_SYNCHRONIZED);
1102 __ jcc(Assembler::zero, L);
1103 // the code below should be shared with interpreter macro
1104 // assembler implementation
1105 {
1106 Label unlock;
1107 // BasicObjectLock will be first in list, since this is a
1108 // synchronized method. However, need to check that the object
1109 // has not been unlocked by an explicit monitorexit bytecode.
1110 const Address monitor(rbp,
1111 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1112 wordSize - sizeof(BasicObjectLock)));
1114 // monitor expect in c_rarg1 for slow unlock path
1115 __ lea(c_rarg1, monitor); // address of first monitor
1117 __ movptr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
1118 __ testptr(t, t);
1119 __ jcc(Assembler::notZero, unlock);
1121 // Entry already unlocked, need to throw exception
1122 __ MacroAssembler::call_VM(noreg,
1123 CAST_FROM_FN_PTR(address,
1124 InterpreterRuntime::throw_illegal_monitor_state_exception));
1125 __ should_not_reach_here();
1127 __ bind(unlock);
1128 __ unlock_object(c_rarg1);
1129 }
1130 __ bind(L);
1131 }
1133 // jvmti support
1134 // Note: This must happen _after_ handling/throwing any exceptions since
1135 // the exception handler code notifies the runtime of method exits
1136 // too. If this happens before, method entry/exit notifications are
1137 // not properly paired (was bug - gri 11/22/99).
1138 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1140 // restore potential result in edx:eax, call result handler to
1141 // restore potential result in ST0 & handle result
1143 __ pop(ltos);
1144 __ pop(dtos);
1146 __ movptr(t, Address(rbp,
1147 (frame::interpreter_frame_result_handler_offset) * wordSize));
1148 __ call(t);
1150 // remove activation
1151 __ movptr(t, Address(rbp,
1152 frame::interpreter_frame_sender_sp_offset *
1153 wordSize)); // get sender sp
1154 __ leave(); // remove frame anchor
1155 __ pop(rdi); // get return address
1156 __ mov(rsp, t); // set sp to sender sp
1157 __ jmp(rdi);
1159 if (inc_counter) {
1160 // Handle overflow of counter and compile method
1161 __ bind(invocation_counter_overflow);
1162 generate_counter_overflow(&continue_after_compile);
1163 }
1165 return entry_point;
1166 }
1168 //
1169 // Generic interpreted method entry to (asm) interpreter
1170 //
1171 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1172 // determine code generation flags
1173 bool inc_counter = UseCompiler || CountCompiledCalls;
1175 // ebx: methodOop
1176 // r13: sender sp
1177 address entry_point = __ pc();
1179 const Address size_of_parameters(rbx,
1180 methodOopDesc::size_of_parameters_offset());
1181 const Address size_of_locals(rbx, methodOopDesc::size_of_locals_offset());
1182 const Address invocation_counter(rbx,
1183 methodOopDesc::invocation_counter_offset() +
1184 InvocationCounter::counter_offset());
1185 const Address access_flags(rbx, methodOopDesc::access_flags_offset());
1187 // get parameter size (always needed)
1188 __ load_unsigned_short(rcx, size_of_parameters);
1190 // rbx: methodOop
1191 // rcx: size of parameters
1192 // r13: sender_sp (could differ from sp+wordSize if we were called via c2i )
1194 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1195 __ subl(rdx, rcx); // rdx = no. of additional locals
1197 // YYY
1198 // __ incrementl(rdx);
1199 // __ andl(rdx, -2);
1201 // see if we've got enough room on the stack for locals plus overhead.
1202 generate_stack_overflow_check();
1204 // get return address
1205 __ pop(rax);
1207 // compute beginning of parameters (r14)
1208 if (TaggedStackInterpreter) __ shll(rcx, 1); // 2 slots per parameter.
1209 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize));
1211 // rdx - # of additional locals
1212 // allocate space for locals
1213 // explicitly initialize locals
1214 {
1215 Label exit, loop;
1216 __ testl(rdx, rdx);
1217 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1218 __ bind(loop);
1219 if (TaggedStackInterpreter) __ push((int) NULL_WORD); // push tag
1220 __ push((int) NULL_WORD); // initialize local variables
1221 __ decrementl(rdx); // until everything initialized
1222 __ jcc(Assembler::greater, loop);
1223 __ bind(exit);
1224 }
1226 // (pre-)fetch invocation count
1227 if (inc_counter) {
1228 __ movl(rcx, invocation_counter);
1229 }
1230 // initialize fixed part of activation frame
1231 generate_fixed_frame(false);
1233 // make sure method is not native & not abstract
1234 #ifdef ASSERT
1235 __ movl(rax, access_flags);
1236 {
1237 Label L;
1238 __ testl(rax, JVM_ACC_NATIVE);
1239 __ jcc(Assembler::zero, L);
1240 __ stop("tried to execute native method as non-native");
1241 __ bind(L);
1242 }
1243 {
1244 Label L;
1245 __ testl(rax, JVM_ACC_ABSTRACT);
1246 __ jcc(Assembler::zero, L);
1247 __ stop("tried to execute abstract method in interpreter");
1248 __ bind(L);
1249 }
1250 #endif
1252 // Since at this point in the method invocation the exception
1253 // handler would try to exit the monitor of synchronized methods
1254 // which hasn't been entered yet, we set the thread local variable
1255 // _do_not_unlock_if_synchronized to true. The remove_activation
1256 // will check this flag.
1258 const Address do_not_unlock_if_synchronized(r15_thread,
1259 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1260 __ movbool(do_not_unlock_if_synchronized, true);
1262 // increment invocation count & check for overflow
1263 Label invocation_counter_overflow;
1264 Label profile_method;
1265 Label profile_method_continue;
1266 if (inc_counter) {
1267 generate_counter_incr(&invocation_counter_overflow,
1268 &profile_method,
1269 &profile_method_continue);
1270 if (ProfileInterpreter) {
1271 __ bind(profile_method_continue);
1272 }
1273 }
1275 Label continue_after_compile;
1276 __ bind(continue_after_compile);
1278 // check for synchronized interpreted methods
1279 bang_stack_shadow_pages(false);
1281 // reset the _do_not_unlock_if_synchronized flag
1282 __ movbool(do_not_unlock_if_synchronized, false);
1284 // check for synchronized methods
1285 // Must happen AFTER invocation_counter check and stack overflow check,
1286 // so method is not locked if overflows.
1287 if (synchronized) {
1288 // Allocate monitor and lock method
1289 lock_method();
1290 } else {
1291 // no synchronization necessary
1292 #ifdef ASSERT
1293 {
1294 Label L;
1295 __ movl(rax, access_flags);
1296 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1297 __ jcc(Assembler::zero, L);
1298 __ stop("method needs synchronization");
1299 __ bind(L);
1300 }
1301 #endif
1302 }
1304 // start execution
1305 #ifdef ASSERT
1306 {
1307 Label L;
1308 const Address monitor_block_top (rbp,
1309 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1310 __ movptr(rax, monitor_block_top);
1311 __ cmpptr(rax, rsp);
1312 __ jcc(Assembler::equal, L);
1313 __ stop("broken stack frame setup in interpreter");
1314 __ bind(L);
1315 }
1316 #endif
1318 // jvmti support
1319 __ notify_method_entry();
1321 __ dispatch_next(vtos);
1323 // invocation counter overflow
1324 if (inc_counter) {
1325 if (ProfileInterpreter) {
1326 // We have decided to profile this method in the interpreter
1327 __ bind(profile_method);
1329 __ call_VM(noreg,
1330 CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method),
1331 r13, true);
1333 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop
1334 __ movptr(rax, Address(rbx,
1335 in_bytes(methodOopDesc::method_data_offset())));
1336 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize),
1337 rax);
1338 __ test_method_data_pointer(rax, profile_method_continue);
1339 __ addptr(rax, in_bytes(methodDataOopDesc::data_offset()));
1340 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize),
1341 rax);
1342 __ jmp(profile_method_continue);
1343 }
1344 // Handle overflow of counter and compile method
1345 __ bind(invocation_counter_overflow);
1346 generate_counter_overflow(&continue_after_compile);
1347 }
1349 return entry_point;
1350 }
1352 // Entry points
1353 //
1354 // Here we generate the various kind of entries into the interpreter.
1355 // The two main entry type are generic bytecode methods and native
1356 // call method. These both come in synchronized and non-synchronized
1357 // versions but the frame layout they create is very similar. The
1358 // other method entry types are really just special purpose entries
1359 // that are really entry and interpretation all in one. These are for
1360 // trivial methods like accessor, empty, or special math methods.
1361 //
1362 // When control flow reaches any of the entry types for the interpreter
1363 // the following holds ->
1364 //
1365 // Arguments:
1366 //
1367 // rbx: methodOop
1368 //
1369 // Stack layout immediately at entry
1370 //
1371 // [ return address ] <--- rsp
1372 // [ parameter n ]
1373 // ...
1374 // [ parameter 1 ]
1375 // [ expression stack ] (caller's java expression stack)
1377 // Assuming that we don't go to one of the trivial specialized entries
1378 // the stack will look like below when we are ready to execute the
1379 // first bytecode (or call the native routine). The register usage
1380 // will be as the template based interpreter expects (see
1381 // interpreter_amd64.hpp).
1382 //
1383 // local variables follow incoming parameters immediately; i.e.
1384 // the return address is moved to the end of the locals).
1385 //
1386 // [ monitor entry ] <--- rsp
1387 // ...
1388 // [ monitor entry ]
1389 // [ expr. stack bottom ]
1390 // [ saved r13 ]
1391 // [ current r14 ]
1392 // [ methodOop ]
1393 // [ saved ebp ] <--- rbp
1394 // [ return address ]
1395 // [ local variable m ]
1396 // ...
1397 // [ local variable 1 ]
1398 // [ parameter n ]
1399 // ...
1400 // [ parameter 1 ] <--- r14
1402 address AbstractInterpreterGenerator::generate_method_entry(
1403 AbstractInterpreter::MethodKind kind) {
1404 // determine code generation flags
1405 bool synchronized = false;
1406 address entry_point = NULL;
1408 switch (kind) {
1409 case Interpreter::zerolocals : break;
1410 case Interpreter::zerolocals_synchronized: synchronized = true; break;
1411 case Interpreter::native : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(false); break;
1412 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(true); break;
1413 case Interpreter::empty : entry_point = ((InterpreterGenerator*) this)->generate_empty_entry(); break;
1414 case Interpreter::accessor : entry_point = ((InterpreterGenerator*) this)->generate_accessor_entry(); break;
1415 case Interpreter::abstract : entry_point = ((InterpreterGenerator*) this)->generate_abstract_entry(); break;
1416 case Interpreter::method_handle : entry_point = ((InterpreterGenerator*) this)->generate_method_handle_entry();break;
1418 case Interpreter::java_lang_math_sin : // fall thru
1419 case Interpreter::java_lang_math_cos : // fall thru
1420 case Interpreter::java_lang_math_tan : // fall thru
1421 case Interpreter::java_lang_math_abs : // fall thru
1422 case Interpreter::java_lang_math_log : // fall thru
1423 case Interpreter::java_lang_math_log10 : // fall thru
1424 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*) this)->generate_math_entry(kind); break;
1425 default : ShouldNotReachHere(); break;
1426 }
1428 if (entry_point) {
1429 return entry_point;
1430 }
1432 return ((InterpreterGenerator*) this)->
1433 generate_normal_entry(synchronized);
1434 }
1436 // How much stack a method activation needs in words.
1437 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) {
1438 const int entry_size = frame::interpreter_frame_monitor_size();
1440 // total overhead size: entry_size + (saved rbp thru expr stack
1441 // bottom). be sure to change this if you add/subtract anything
1442 // to/from the overhead area
1443 const int overhead_size =
1444 -(frame::interpreter_frame_initial_sp_offset) + entry_size;
1446 const int stub_code = frame::entry_frame_after_call_words;
1447 const int extra_stack = methodOopDesc::extra_stack_entries();
1448 const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) *
1449 Interpreter::stackElementWords();
1450 return (overhead_size + method_stack + stub_code);
1451 }
1453 int AbstractInterpreter::layout_activation(methodOop method,
1454 int tempcount,
1455 int popframe_extra_args,
1456 int moncount,
1457 int callee_param_count,
1458 int callee_locals,
1459 frame* caller,
1460 frame* interpreter_frame,
1461 bool is_top_frame) {
1462 // Note: This calculation must exactly parallel the frame setup
1463 // in AbstractInterpreterGenerator::generate_method_entry.
1464 // If interpreter_frame!=NULL, set up the method, locals, and monitors.
1465 // The frame interpreter_frame, if not NULL, is guaranteed to be the
1466 // right size, as determined by a previous call to this method.
1467 // It is also guaranteed to be walkable even though it is in a skeletal state
1469 // fixed size of an interpreter frame:
1470 int max_locals = method->max_locals() * Interpreter::stackElementWords();
1471 int extra_locals = (method->max_locals() - method->size_of_parameters()) *
1472 Interpreter::stackElementWords();
1474 int overhead = frame::sender_sp_offset -
1475 frame::interpreter_frame_initial_sp_offset;
1476 // Our locals were accounted for by the caller (or last_frame_adjust
1477 // on the transistion) Since the callee parameters already account
1478 // for the callee's params we only need to account for the extra
1479 // locals.
1480 int size = overhead +
1481 (callee_locals - callee_param_count)*Interpreter::stackElementWords() +
1482 moncount * frame::interpreter_frame_monitor_size() +
1483 tempcount* Interpreter::stackElementWords() + popframe_extra_args;
1484 if (interpreter_frame != NULL) {
1485 #ifdef ASSERT
1486 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(),
1487 "Frame not properly walkable");
1488 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");
1489 #endif
1491 interpreter_frame->interpreter_frame_set_method(method);
1492 // NOTE the difference in using sender_sp and
1493 // interpreter_frame_sender_sp interpreter_frame_sender_sp is
1494 // the original sp of the caller (the unextended_sp) and
1495 // sender_sp is fp+16 XXX
1496 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
1498 interpreter_frame->interpreter_frame_set_locals(locals);
1499 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
1500 BasicObjectLock* monbot = montop - moncount;
1501 interpreter_frame->interpreter_frame_set_monitor_end(monbot);
1503 // Set last_sp
1504 intptr_t* esp = (intptr_t*) monbot -
1505 tempcount*Interpreter::stackElementWords() -
1506 popframe_extra_args;
1507 interpreter_frame->interpreter_frame_set_last_sp(esp);
1509 // All frames but the initial (oldest) interpreter frame we fill in have
1510 // a value for sender_sp that allows walking the stack but isn't
1511 // truly correct. Correct the value here.
1512 if (extra_locals != 0 &&
1513 interpreter_frame->sender_sp() ==
1514 interpreter_frame->interpreter_frame_sender_sp()) {
1515 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() +
1516 extra_locals);
1517 }
1518 *interpreter_frame->interpreter_frame_cache_addr() =
1519 method->constants()->cache();
1520 }
1521 return size;
1522 }
1524 //-----------------------------------------------------------------------------
1525 // Exceptions
1527 void TemplateInterpreterGenerator::generate_throw_exception() {
1528 // Entry point in previous activation (i.e., if the caller was
1529 // interpreted)
1530 Interpreter::_rethrow_exception_entry = __ pc();
1531 // Restore sp to interpreter_frame_last_sp even though we are going
1532 // to empty the expression stack for the exception processing.
1533 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1534 // rax: exception
1535 // rdx: return address/pc that threw exception
1536 __ restore_bcp(); // r13 points to call/send
1537 __ restore_locals();
1538 __ reinit_heapbase(); // restore r12 as heapbase.
1539 // Entry point for exceptions thrown within interpreter code
1540 Interpreter::_throw_exception_entry = __ pc();
1541 // expression stack is undefined here
1542 // rax: exception
1543 // r13: exception bcp
1544 __ verify_oop(rax);
1545 __ mov(c_rarg1, rax);
1547 // expression stack must be empty before entering the VM in case of
1548 // an exception
1549 __ empty_expression_stack();
1550 // find exception handler address and preserve exception oop
1551 __ call_VM(rdx,
1552 CAST_FROM_FN_PTR(address,
1553 InterpreterRuntime::exception_handler_for_exception),
1554 c_rarg1);
1555 // rax: exception handler entry point
1556 // rdx: preserved exception oop
1557 // r13: bcp for exception handler
1558 __ push_ptr(rdx); // push exception which is now the only value on the stack
1559 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1561 // If the exception is not handled in the current frame the frame is
1562 // removed and the exception is rethrown (i.e. exception
1563 // continuation is _rethrow_exception).
1564 //
1565 // Note: At this point the bci is still the bxi for the instruction
1566 // which caused the exception and the expression stack is
1567 // empty. Thus, for any VM calls at this point, GC will find a legal
1568 // oop map (with empty expression stack).
1570 // In current activation
1571 // tos: exception
1572 // esi: exception bcp
1574 //
1575 // JVMTI PopFrame support
1576 //
1578 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1579 __ empty_expression_stack();
1580 // Set the popframe_processing bit in pending_popframe_condition
1581 // indicating that we are currently handling popframe, so that
1582 // call_VMs that may happen later do not trigger new popframe
1583 // handling cycles.
1584 __ movl(rdx, Address(r15_thread, JavaThread::popframe_condition_offset()));
1585 __ orl(rdx, JavaThread::popframe_processing_bit);
1586 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), rdx);
1588 {
1589 // Check to see whether we are returning to a deoptimized frame.
1590 // (The PopFrame call ensures that the caller of the popped frame is
1591 // either interpreted or compiled and deoptimizes it if compiled.)
1592 // In this case, we can't call dispatch_next() after the frame is
1593 // popped, but instead must save the incoming arguments and restore
1594 // them after deoptimization has occurred.
1595 //
1596 // Note that we don't compare the return PC against the
1597 // deoptimization blob's unpack entry because of the presence of
1598 // adapter frames in C2.
1599 Label caller_not_deoptimized;
1600 __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize));
1601 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1602 InterpreterRuntime::interpreter_contains), c_rarg1);
1603 __ testl(rax, rax);
1604 __ jcc(Assembler::notZero, caller_not_deoptimized);
1606 // Compute size of arguments for saving when returning to
1607 // deoptimized caller
1608 __ get_method(rax);
1609 __ load_unsigned_short(rax, Address(rax, in_bytes(methodOopDesc::
1610 size_of_parameters_offset())));
1611 __ shll(rax, Interpreter::logStackElementSize());
1612 __ restore_locals(); // XXX do we need this?
1613 __ subptr(r14, rax);
1614 __ addptr(r14, wordSize);
1615 // Save these arguments
1616 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1617 Deoptimization::
1618 popframe_preserve_args),
1619 r15_thread, rax, r14);
1621 __ remove_activation(vtos, rdx,
1622 /* throw_monitor_exception */ false,
1623 /* install_monitor_exception */ false,
1624 /* notify_jvmdi */ false);
1626 // Inform deoptimization that it is responsible for restoring
1627 // these arguments
1628 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1629 JavaThread::popframe_force_deopt_reexecution_bit);
1631 // Continue in deoptimization handler
1632 __ jmp(rdx);
1634 __ bind(caller_not_deoptimized);
1635 }
1637 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1638 /* throw_monitor_exception */ false,
1639 /* install_monitor_exception */ false,
1640 /* notify_jvmdi */ false);
1642 // Finish with popframe handling
1643 // A previous I2C followed by a deoptimization might have moved the
1644 // outgoing arguments further up the stack. PopFrame expects the
1645 // mutations to those outgoing arguments to be preserved and other
1646 // constraints basically require this frame to look exactly as
1647 // though it had previously invoked an interpreted activation with
1648 // no space between the top of the expression stack (current
1649 // last_sp) and the top of stack. Rather than force deopt to
1650 // maintain this kind of invariant all the time we call a small
1651 // fixup routine to move the mutated arguments onto the top of our
1652 // expression stack if necessary.
1653 __ mov(c_rarg1, rsp);
1654 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1655 // PC must point into interpreter here
1656 __ set_last_Java_frame(noreg, rbp, __ pc());
1657 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1658 __ reset_last_Java_frame(true, true);
1659 // Restore the last_sp and null it out
1660 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1661 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1663 __ restore_bcp(); // XXX do we need this?
1664 __ restore_locals(); // XXX do we need this?
1665 // The method data pointer was incremented already during
1666 // call profiling. We have to restore the mdp for the current bcp.
1667 if (ProfileInterpreter) {
1668 __ set_method_data_pointer_for_bcp();
1669 }
1671 // Clear the popframe condition flag
1672 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()),
1673 JavaThread::popframe_inactive);
1675 __ dispatch_next(vtos);
1676 // end of PopFrame support
1678 Interpreter::_remove_activation_entry = __ pc();
1680 // preserve exception over this code sequence
1681 __ pop_ptr(rax);
1682 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), rax);
1683 // remove the activation (without doing throws on illegalMonitorExceptions)
1684 __ remove_activation(vtos, rdx, false, true, false);
1685 // restore exception
1686 __ movptr(rax, Address(r15_thread, JavaThread::vm_result_offset()));
1687 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int32_t)NULL_WORD);
1688 __ verify_oop(rax);
1690 // In between activations - previous activation type unknown yet
1691 // compute continuation point - the continuation point expects the
1692 // following registers set up:
1693 //
1694 // rax: exception
1695 // rdx: return address/pc that threw exception
1696 // rsp: expression stack of caller
1697 // rbp: ebp of caller
1698 __ push(rax); // save exception
1699 __ push(rdx); // save return address
1700 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1701 SharedRuntime::exception_handler_for_return_address),
1702 rdx);
1703 __ mov(rbx, rax); // save exception handler
1704 __ pop(rdx); // restore return address
1705 __ pop(rax); // restore exception
1706 // Note that an "issuing PC" is actually the next PC after the call
1707 __ jmp(rbx); // jump to exception
1708 // handler of caller
1709 }
1712 //
1713 // JVMTI ForceEarlyReturn support
1714 //
1715 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1716 address entry = __ pc();
1718 __ restore_bcp();
1719 __ restore_locals();
1720 __ empty_expression_stack();
1721 __ load_earlyret_value(state);
1723 __ movptr(rdx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
1724 Address cond_addr(rdx, JvmtiThreadState::earlyret_state_offset());
1726 // Clear the earlyret state
1727 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1729 __ remove_activation(state, rsi,
1730 false, /* throw_monitor_exception */
1731 false, /* install_monitor_exception */
1732 true); /* notify_jvmdi */
1733 __ jmp(rsi);
1735 return entry;
1736 } // end of ForceEarlyReturn support
1739 //-----------------------------------------------------------------------------
1740 // Helper for vtos entry point generation
1742 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1743 address& bep,
1744 address& cep,
1745 address& sep,
1746 address& aep,
1747 address& iep,
1748 address& lep,
1749 address& fep,
1750 address& dep,
1751 address& vep) {
1752 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1753 Label L;
1754 aep = __ pc(); __ push_ptr(); __ jmp(L);
1755 fep = __ pc(); __ push_f(); __ jmp(L);
1756 dep = __ pc(); __ push_d(); __ jmp(L);
1757 lep = __ pc(); __ push_l(); __ jmp(L);
1758 bep = cep = sep =
1759 iep = __ pc(); __ push_i();
1760 vep = __ pc();
1761 __ bind(L);
1762 generate_and_dispatch(t);
1763 }
1766 //-----------------------------------------------------------------------------
1767 // Generation of individual instructions
1769 // helpers for generate_and_dispatch
1772 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1773 : TemplateInterpreterGenerator(code) {
1774 generate_all(); // down here so it can be "virtual"
1775 }
1777 //-----------------------------------------------------------------------------
1779 // Non-product code
1780 #ifndef PRODUCT
1781 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1782 address entry = __ pc();
1784 __ push(state);
1785 __ push(c_rarg0);
1786 __ push(c_rarg1);
1787 __ push(c_rarg2);
1788 __ push(c_rarg3);
1789 __ mov(c_rarg2, rax); // Pass itos
1790 #ifdef _WIN64
1791 __ movflt(xmm3, xmm0); // Pass ftos
1792 #endif
1793 __ call_VM(noreg,
1794 CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode),
1795 c_rarg1, c_rarg2, c_rarg3);
1796 __ pop(c_rarg3);
1797 __ pop(c_rarg2);
1798 __ pop(c_rarg1);
1799 __ pop(c_rarg0);
1800 __ pop(state);
1801 __ ret(0); // return from result handler
1803 return entry;
1804 }
1806 void TemplateInterpreterGenerator::count_bytecode() {
1807 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1808 }
1810 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1811 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1812 }
1814 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1815 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1816 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1817 __ orl(rbx,
1818 ((int) t->bytecode()) <<
1819 BytecodePairHistogram::log2_number_of_codes);
1820 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1821 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1822 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1823 }
1826 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1827 // Call a little run-time stub to avoid blow-up for each bytecode.
1828 // The run-time runtime saves the right registers, depending on
1829 // the tosca in-state for the given template.
1831 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1832 "entry must have been generated");
1833 __ mov(r12, rsp); // remember sp
1834 __ andptr(rsp, -16); // align stack as required by ABI
1835 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1836 __ mov(rsp, r12); // restore sp
1837 __ reinit_heapbase();
1838 }
1841 void TemplateInterpreterGenerator::stop_interpreter_at() {
1842 Label L;
1843 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1844 StopInterpreterAt);
1845 __ jcc(Assembler::notEqual, L);
1846 __ int3();
1847 __ bind(L);
1848 }
1849 #endif // !PRODUCT
1850 #endif // ! CC_INTERP
