1 /*
2 * Copyright 1997-2008 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 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_interp_masm_x86_32.cpp.incl"
27
28
29 // Implementation of InterpreterMacroAssembler
30 #ifdef CC_INTERP
31 void InterpreterMacroAssembler::get_method(Register reg) {
32 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
33 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
34 }
35 #endif // CC_INTERP
36
37
38 #ifndef CC_INTERP
39 void InterpreterMacroAssembler::call_VM_leaf_base(
40 address entry_point,
41 int number_of_arguments
42 ) {
43 // interpreter specific
44 //
45 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer
46 // since these are callee saved registers and no blocking/
47 // GC can happen in leaf calls.
48 // Further Note: DO NOT save/restore bcp/locals. If a caller has
49 // already saved them so that it can use rsi/rdi as temporaries
50 // then a save/restore here will DESTROY the copy the caller
51 // saved! There used to be a save_bcp() that only happened in
52 // the ASSERT path (no restore_bcp). Which caused bizarre failures
53 // when jvm built with ASSERTs.
54 #ifdef ASSERT
55 { Label L;
56 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
57 jcc(Assembler::equal, L);
58 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
59 bind(L);
60 }
61 #endif
62 // super call
63 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
64 // interpreter specific
65
66 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals
67 // but since they may not have been saved (and we don't want to
68 // save them here (see note above) the assert is invalid.
69 }
70
71
72 void InterpreterMacroAssembler::call_VM_base(
73 Register oop_result,
74 Register java_thread,
75 Register last_java_sp,
76 address entry_point,
77 int number_of_arguments,
78 bool check_exceptions
79 ) {
80 #ifdef ASSERT
81 { Label L;
82 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
83 jcc(Assembler::equal, L);
84 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
85 bind(L);
86 }
87 #endif /* ASSERT */
88 // interpreter specific
89 //
90 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
91 // really make a difference for these runtime calls, since they are
92 // slow anyway. Btw., bcp must be saved/restored since it may change
93 // due to GC.
94 assert(java_thread == noreg , "not expecting a precomputed java thread");
95 save_bcp();
96 // super call
97 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
98 // interpreter specific
99 restore_bcp();
100 restore_locals();
101 }
102
103
104 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
105 if (JvmtiExport::can_pop_frame()) {
106 Label L;
107 // Initiate popframe handling only if it is not already being processed. If the flag
108 // has the popframe_processing bit set, it means that this code is called *during* popframe
109 // handling - we don't want to reenter.
110 Register pop_cond = java_thread; // Not clear if any other register is available...
111 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
112 testl(pop_cond, JavaThread::popframe_pending_bit);
113 jcc(Assembler::zero, L);
114 testl(pop_cond, JavaThread::popframe_processing_bit);
115 jcc(Assembler::notZero, L);
116 // Call Interpreter::remove_activation_preserving_args_entry() to get the
117 // address of the same-named entrypoint in the generated interpreter code.
118 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
119 jmp(rax);
120 bind(L);
121 get_thread(java_thread);
122 }
123 }
124
125
126 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
127 get_thread(rcx);
128 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
129 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset());
130 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset());
131 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset());
132 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
133 + in_ByteSize(wordSize));
134 switch (state) {
135 case atos: movptr(rax, oop_addr);
136 movptr(oop_addr, NULL_WORD);
137 verify_oop(rax, state); break;
138 case ltos:
139 movl(rdx, val_addr1); // fall through
140 case btos: // fall through
141 case ctos: // fall through
142 case stos: // fall through
143 case itos: movl(rax, val_addr); break;
144 case ftos: fld_s(val_addr); break;
145 case dtos: fld_d(val_addr); break;
146 case vtos: /* nothing to do */ break;
147 default : ShouldNotReachHere();
148 }
149 // Clean up tos value in the thread object
150 movl(tos_addr, (int32_t) ilgl);
151 movptr(val_addr, NULL_WORD);
152 NOT_LP64(movl(val_addr1, NULL_WORD));
153 }
154
155
156 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
157 if (JvmtiExport::can_force_early_return()) {
158 Label L;
159 Register tmp = java_thread;
160 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
161 testptr(tmp, tmp);
162 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
163
164 // Initiate earlyret handling only if it is not already being processed.
165 // If the flag has the earlyret_processing bit set, it means that this code
166 // is called *during* earlyret handling - we don't want to reenter.
167 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
168 cmpl(tmp, JvmtiThreadState::earlyret_pending);
169 jcc(Assembler::notEqual, L);
170
171 // Call Interpreter::remove_activation_early_entry() to get the address of the
172 // same-named entrypoint in the generated interpreter code.
173 get_thread(java_thread);
174 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
175 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
176 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
177 jmp(rax);
178 bind(L);
179 get_thread(java_thread);
180 }
181 }
182
183
184 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
185 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
186 movl(reg, Address(rsi, bcp_offset));
187 bswapl(reg);
188 shrl(reg, 16);
189 }
190
191
192 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset) {
193 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
194 assert(cache != index, "must use different registers");
195 load_unsigned_word(index, Address(rsi, bcp_offset));
196 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
197 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
198 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index
199 }
200
201
202 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset) {
203 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
204 assert(cache != tmp, "must use different register");
205 load_unsigned_word(tmp, Address(rsi, bcp_offset));
206 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
207 // convert from field index to ConstantPoolCacheEntry index
208 // and from word offset to byte offset
209 shll(tmp, 2 + LogBytesPerWord);
210 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
211 // skip past the header
212 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset()));
213 addptr(cache, tmp); // construct pointer to cache entry
214 }
215
216
217 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
218 // a subtype of super_klass. EAX holds the super_klass. Blows ECX.
219 // Resets EDI to locals. Register sub_klass cannot be any of the above.
220 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
221 assert( Rsub_klass != rax, "rax, holds superklass" );
222 assert( Rsub_klass != rcx, "rcx holds 2ndary super array length" );
223 assert( Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr" );
224 Label not_subtype, loop;
225
226 // Profile the not-null value's klass.
227 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, rdi
228
229 // Load the super-klass's check offset into ECX
230 movl( rcx, Address(rax, sizeof(oopDesc) + Klass::super_check_offset_offset_in_bytes() ) );
231 // Load from the sub-klass's super-class display list, or a 1-word cache of
232 // the secondary superclass list, or a failing value with a sentinel offset
233 // if the super-klass is an interface or exceptionally deep in the Java
234 // hierarchy and we have to scan the secondary superclass list the hard way.
235 // See if we get an immediate positive hit
236 cmpptr( rax, Address(Rsub_klass,rcx,Address::times_1) );
237 jcc( Assembler::equal,ok_is_subtype );
238
239 // Check for immediate negative hit
240 cmpl( rcx, sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes() );
241 jcc( Assembler::notEqual, not_subtype );
242 // Check for self
243 cmpptr( Rsub_klass, rax );
244 jcc( Assembler::equal, ok_is_subtype );
245
246 // Now do a linear scan of the secondary super-klass chain.
247 movptr( rdi, Address(Rsub_klass, sizeof(oopDesc) + Klass::secondary_supers_offset_in_bytes()) );
248 // EDI holds the objArrayOop of secondary supers.
249 movl( rcx, Address(rdi, arrayOopDesc::length_offset_in_bytes()));// Load the array length
250 // Skip to start of data; also clear Z flag incase ECX is zero
251 addptr( rdi, arrayOopDesc::base_offset_in_bytes(T_OBJECT) );
252 // Scan ECX words at [EDI] for occurance of EAX
253 // Set NZ/Z based on last compare
254 repne_scan();
255 restore_locals(); // Restore EDI; Must not blow flags
256 // Not equal?
257 jcc( Assembler::notEqual, not_subtype );
258 // Must be equal but missed in cache. Update cache.
259 movptr( Address(Rsub_klass, sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes()), rax );
260 jmp( ok_is_subtype );
261
262 bind(not_subtype);
263 profile_typecheck_failed(rcx); // blows rcx
264 }
265
266 void InterpreterMacroAssembler::f2ieee() {
267 if (IEEEPrecision) {
268 fstp_s(Address(rsp, 0));
269 fld_s(Address(rsp, 0));
270 }
271 }
272
273
274 void InterpreterMacroAssembler::d2ieee() {
275 if (IEEEPrecision) {
276 fstp_d(Address(rsp, 0));
277 fld_d(Address(rsp, 0));
278 }
279 }
280
281 // Java Expression Stack
282
283 #ifdef ASSERT
284 void InterpreterMacroAssembler::verify_stack_tag(frame::Tag t) {
285 if (TaggedStackInterpreter) {
286 Label okay;
287 cmpptr(Address(rsp, wordSize), (int32_t)t);
288 jcc(Assembler::equal, okay);
289 // Also compare if the stack value is zero, then the tag might
290 // not have been set coming from deopt.
291 cmpptr(Address(rsp, 0), 0);
292 jcc(Assembler::equal, okay);
293 stop("Java Expression stack tag value is bad");
294 bind(okay);
295 }
296 }
297 #endif // ASSERT
298
299 void InterpreterMacroAssembler::pop_ptr(Register r) {
300 debug_only(verify_stack_tag(frame::TagReference));
301 pop(r);
302 if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
303 }
304
305 void InterpreterMacroAssembler::pop_ptr(Register r, Register tag) {
306 pop(r);
307 // Tag may not be reference for jsr, can be returnAddress
308 if (TaggedStackInterpreter) pop(tag);
309 }
310
311 void InterpreterMacroAssembler::pop_i(Register r) {
312 debug_only(verify_stack_tag(frame::TagValue));
313 pop(r);
314 if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
315 }
316
317 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
318 debug_only(verify_stack_tag(frame::TagValue));
319 pop(lo);
320 if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
321 debug_only(verify_stack_tag(frame::TagValue));
322 pop(hi);
323 if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
324 }
325
326 void InterpreterMacroAssembler::pop_f() {
327 debug_only(verify_stack_tag(frame::TagValue));
328 fld_s(Address(rsp, 0));
329 addptr(rsp, 1 * wordSize);
330 if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
331 }
332
333 void InterpreterMacroAssembler::pop_d() {
334 // Write double to stack contiguously and load into ST0
335 pop_dtos_to_rsp();
336 fld_d(Address(rsp, 0));
337 addptr(rsp, 2 * wordSize);
338 }
339
340
341 // Pop the top of the java expression stack to execution stack (which
342 // happens to be the same place).
343 void InterpreterMacroAssembler::pop_dtos_to_rsp() {
344 if (TaggedStackInterpreter) {
345 // Pop double value into scratch registers
346 debug_only(verify_stack_tag(frame::TagValue));
347 pop(rax);
348 addptr(rsp, 1* wordSize);
349 debug_only(verify_stack_tag(frame::TagValue));
350 pop(rdx);
351 addptr(rsp, 1* wordSize);
352 push(rdx);
353 push(rax);
354 }
355 }
356
357 void InterpreterMacroAssembler::pop_ftos_to_rsp() {
358 if (TaggedStackInterpreter) {
359 debug_only(verify_stack_tag(frame::TagValue));
360 pop(rax);
361 addptr(rsp, 1 * wordSize);
362 push(rax); // ftos is at rsp
363 }
364 }
365
366 void InterpreterMacroAssembler::pop(TosState state) {
367 switch (state) {
368 case atos: pop_ptr(rax); break;
369 case btos: // fall through
370 case ctos: // fall through
371 case stos: // fall through
372 case itos: pop_i(rax); break;
373 case ltos: pop_l(rax, rdx); break;
374 case ftos: pop_f(); break;
375 case dtos: pop_d(); break;
376 case vtos: /* nothing to do */ break;
377 default : ShouldNotReachHere();
378 }
379 verify_oop(rax, state);
380 }
381
382 void InterpreterMacroAssembler::push_ptr(Register r) {
383 if (TaggedStackInterpreter) push(frame::TagReference);
384 push(r);
385 }
386
387 void InterpreterMacroAssembler::push_ptr(Register r, Register tag) {
388 if (TaggedStackInterpreter) push(tag); // tag first
389 push(r);
390 }
391
392 void InterpreterMacroAssembler::push_i(Register r) {
393 if (TaggedStackInterpreter) push(frame::TagValue);
394 push(r);
395 }
396
397 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
398 if (TaggedStackInterpreter) push(frame::TagValue);
399 push(hi);
400 if (TaggedStackInterpreter) push(frame::TagValue);
401 push(lo);
402 }
403
404 void InterpreterMacroAssembler::push_f() {
405 if (TaggedStackInterpreter) push(frame::TagValue);
406 // Do not schedule for no AGI! Never write beyond rsp!
407 subptr(rsp, 1 * wordSize);
408 fstp_s(Address(rsp, 0));
409 }
410
411 void InterpreterMacroAssembler::push_d(Register r) {
412 if (TaggedStackInterpreter) {
413 // Double values are stored as:
414 // tag
415 // high
416 // tag
417 // low
418 push(frame::TagValue);
419 subptr(rsp, 3 * wordSize);
420 fstp_d(Address(rsp, 0));
421 // move high word up to slot n-1
422 movl(r, Address(rsp, 1*wordSize));
423 movl(Address(rsp, 2*wordSize), r);
424 // move tag
425 movl(Address(rsp, 1*wordSize), frame::TagValue);
426 } else {
427 // Do not schedule for no AGI! Never write beyond rsp!
428 subptr(rsp, 2 * wordSize);
429 fstp_d(Address(rsp, 0));
430 }
431 }
432
433
434 void InterpreterMacroAssembler::push(TosState state) {
435 verify_oop(rax, state);
436 switch (state) {
437 case atos: push_ptr(rax); break;
438 case btos: // fall through
439 case ctos: // fall through
440 case stos: // fall through
441 case itos: push_i(rax); break;
442 case ltos: push_l(rax, rdx); break;
443 case ftos: push_f(); break;
444 case dtos: push_d(rax); break;
445 case vtos: /* nothing to do */ break;
446 default : ShouldNotReachHere();
447 }
448 }
449
450
451 // Tagged stack helpers for swap and dup
452 void InterpreterMacroAssembler::load_ptr_and_tag(int n, Register val,
453 Register tag) {
454 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
455 if (TaggedStackInterpreter) {
456 movptr(tag, Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)));
457 }
458 }
459
460 void InterpreterMacroAssembler::store_ptr_and_tag(int n, Register val,
461 Register tag) {
462 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
463 if (TaggedStackInterpreter) {
464 movptr(Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)), tag);
465 }
466 }
467
468
469 // Tagged local support
470 void InterpreterMacroAssembler::tag_local(frame::Tag tag, int n) {
471 if (TaggedStackInterpreter) {
472 if (tag == frame::TagCategory2) {
473 movptr(Address(rdi, Interpreter::local_tag_offset_in_bytes(n+1)), (int32_t)frame::TagValue);
474 movptr(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), (int32_t)frame::TagValue);
475 } else {
476 movptr(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), (int32_t)tag);
477 }
478 }
479 }
480
481 void InterpreterMacroAssembler::tag_local(frame::Tag tag, Register idx) {
482 if (TaggedStackInterpreter) {
483 if (tag == frame::TagCategory2) {
484 movptr(Address(rdi, idx, Interpreter::stackElementScale(),
485 Interpreter::local_tag_offset_in_bytes(1)), (int32_t)frame::TagValue);
486 movptr(Address(rdi, idx, Interpreter::stackElementScale(),
487 Interpreter::local_tag_offset_in_bytes(0)), (int32_t)frame::TagValue);
488 } else {
489 movptr(Address(rdi, idx, Interpreter::stackElementScale(),
490 Interpreter::local_tag_offset_in_bytes(0)), (int32_t)tag);
491 }
492 }
493 }
494
495 void InterpreterMacroAssembler::tag_local(Register tag, Register idx) {
496 if (TaggedStackInterpreter) {
497 // can only be TagValue or TagReference
498 movptr(Address(rdi, idx, Interpreter::stackElementScale(),
499 Interpreter::local_tag_offset_in_bytes(0)), tag);
500 }
501 }
502
503
504 void InterpreterMacroAssembler::tag_local(Register tag, int n) {
505 if (TaggedStackInterpreter) {
506 // can only be TagValue or TagReference
507 movptr(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), tag);
508 }
509 }
510
511 #ifdef ASSERT
512 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, int n) {
513 if (TaggedStackInterpreter) {
514 frame::Tag t = tag;
515 if (tag == frame::TagCategory2) {
516 Label nbl;
517 t = frame::TagValue; // change to what is stored in locals
518 cmpptr(Address(rdi, Interpreter::local_tag_offset_in_bytes(n+1)), (int32_t)t);
519 jcc(Assembler::equal, nbl);
520 stop("Local tag is bad for long/double");
521 bind(nbl);
522 }
523 Label notBad;
524 cmpptr(Address(rdi, Interpreter::local_tag_offset_in_bytes(n)), (int32_t)t);
525 jcc(Assembler::equal, notBad);
526 // Also compare if the local value is zero, then the tag might
527 // not have been set coming from deopt.
528 cmpptr(Address(rdi, Interpreter::local_offset_in_bytes(n)), 0);
529 jcc(Assembler::equal, notBad);
530 stop("Local tag is bad");
531 bind(notBad);
532 }
533 }
534
535 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, Register idx) {
536 if (TaggedStackInterpreter) {
537 frame::Tag t = tag;
538 if (tag == frame::TagCategory2) {
539 Label nbl;
540 t = frame::TagValue; // change to what is stored in locals
541 cmpptr(Address(rdi, idx, Interpreter::stackElementScale(),
542 Interpreter::local_tag_offset_in_bytes(1)), (int32_t)t);
543 jcc(Assembler::equal, nbl);
544 stop("Local tag is bad for long/double");
545 bind(nbl);
546 }
547 Label notBad;
548 cmpl(Address(rdi, idx, Interpreter::stackElementScale(),
549 Interpreter::local_tag_offset_in_bytes(0)), (int32_t)t);
550 jcc(Assembler::equal, notBad);
551 // Also compare if the local value is zero, then the tag might
552 // not have been set coming from deopt.
553 cmpptr(Address(rdi, idx, Interpreter::stackElementScale(),
554 Interpreter::local_offset_in_bytes(0)), 0);
555 jcc(Assembler::equal, notBad);
556 stop("Local tag is bad");
557 bind(notBad);
558
559 }
560 }
561 #endif // ASSERT
562
563 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) {
564 MacroAssembler::call_VM_leaf_base(entry_point, 0);
565 }
566
567
568 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1) {
569 push(arg_1);
570 MacroAssembler::call_VM_leaf_base(entry_point, 1);
571 }
572
573
574 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2) {
575 push(arg_2);
576 push(arg_1);
577 MacroAssembler::call_VM_leaf_base(entry_point, 2);
578 }
579
580
581 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3) {
582 push(arg_3);
583 push(arg_2);
584 push(arg_1);
585 MacroAssembler::call_VM_leaf_base(entry_point, 3);
586 }
587
588
589 // Jump to from_interpreted entry of a call unless single stepping is possible
590 // in this thread in which case we must call the i2i entry
591 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
592 // set sender sp
593 lea(rsi, Address(rsp, wordSize));
594 // record last_sp
595 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
596
597 if (JvmtiExport::can_post_interpreter_events()) {
598 Label run_compiled_code;
599 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
600 // compiled code in threads for which the event is enabled. Check here for
601 // interp_only_mode if these events CAN be enabled.
602 get_thread(temp);
603 // interp_only is an int, on little endian it is sufficient to test the byte only
604 // Is a cmpl faster (ce
605 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
606 jcc(Assembler::zero, run_compiled_code);
607 jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
608 bind(run_compiled_code);
609 }
610
611 jmp(Address(method, methodOopDesc::from_interpreted_offset()));
612
613 }
614
615
616 // The following two routines provide a hook so that an implementation
617 // can schedule the dispatch in two parts. Intel does not do this.
618 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
619 // Nothing Intel-specific to be done here.
620 }
621
622 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
623 dispatch_next(state, step);
624 }
625
626 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
627 bool verifyoop) {
628 verify_FPU(1, state);
629 if (VerifyActivationFrameSize) {
630 Label L;
631 mov(rcx, rbp);
632 subptr(rcx, rsp);
633 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
634 cmpptr(rcx, min_frame_size);
635 jcc(Assembler::greaterEqual, L);
636 stop("broken stack frame");
637 bind(L);
638 }
639 if (verifyoop) verify_oop(rax, state);
640 Address index(noreg, rbx, Address::times_ptr);
641 ExternalAddress tbl((address)table);
642 ArrayAddress dispatch(tbl, index);
643 jump(dispatch);
644 }
645
646
647 void InterpreterMacroAssembler::dispatch_only(TosState state) {
648 dispatch_base(state, Interpreter::dispatch_table(state));
649 }
650
651
652 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
653 dispatch_base(state, Interpreter::normal_table(state));
654 }
655
656 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
657 dispatch_base(state, Interpreter::normal_table(state), false);
658 }
659
660
661 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
662 // load next bytecode (load before advancing rsi to prevent AGI)
663 load_unsigned_byte(rbx, Address(rsi, step));
664 // advance rsi
665 increment(rsi, step);
666 dispatch_base(state, Interpreter::dispatch_table(state));
667 }
668
669
670 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
671 // load current bytecode
672 load_unsigned_byte(rbx, Address(rsi, 0));
673 dispatch_base(state, table);
674 }
675
676 // remove activation
677 //
678 // Unlock the receiver if this is a synchronized method.
679 // Unlock any Java monitors from syncronized blocks.
680 // Remove the activation from the stack.
681 //
682 // If there are locked Java monitors
683 // If throw_monitor_exception
684 // throws IllegalMonitorStateException
685 // Else if install_monitor_exception
686 // installs IllegalMonitorStateException
687 // Else
688 // no error processing
689 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
690 bool throw_monitor_exception,
691 bool install_monitor_exception,
692 bool notify_jvmdi) {
693 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
694 // check if synchronized method
695 Label unlocked, unlock, no_unlock;
696
697 get_thread(rcx);
698 const Address do_not_unlock_if_synchronized(rcx,
699 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
700
701 movbool(rbx, do_not_unlock_if_synchronized);
702 mov(rdi,rbx);
703 movbool(do_not_unlock_if_synchronized, false); // reset the flag
704
705 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
706 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset()));
707
708 testl(rcx, JVM_ACC_SYNCHRONIZED);
709 jcc(Assembler::zero, unlocked);
710
711 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
712 // is set.
713 mov(rcx,rdi);
714 testbool(rcx);
715 jcc(Assembler::notZero, no_unlock);
716
717 // unlock monitor
718 push(state); // save result
719
720 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
721 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
722 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
723 lea (rdx, monitor); // address of first monitor
724
725 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
726 testptr(rax, rax);
727 jcc (Assembler::notZero, unlock);
728
729 pop(state);
730 if (throw_monitor_exception) {
731 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
732
733 // Entry already unlocked, need to throw exception
734 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
735 should_not_reach_here();
736 } else {
737 // Monitor already unlocked during a stack unroll.
738 // If requested, install an illegal_monitor_state_exception.
739 // Continue with stack unrolling.
740 if (install_monitor_exception) {
741 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
742 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
743 }
744 jmp(unlocked);
745 }
746
747 bind(unlock);
748 unlock_object(rdx);
749 pop(state);
750
751 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
752 bind(unlocked);
753
754 // rax, rdx: Might contain return value
755
756 // Check that all monitors are unlocked
757 {
758 Label loop, exception, entry, restart;
759 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
760 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
761 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
762
763 bind(restart);
764 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry
765 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block
766 jmp(entry);
767
768 // Entry already locked, need to throw exception
769 bind(exception);
770
771 if (throw_monitor_exception) {
772 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
773
774 // Throw exception
775 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
776 should_not_reach_here();
777 } else {
778 // Stack unrolling. Unlock object and install illegal_monitor_exception
779 // Unlock does not block, so don't have to worry about the frame
780
781 push(state);
782 mov(rdx, rcx);
783 unlock_object(rdx);
784 pop(state);
785
786 if (install_monitor_exception) {
787 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
788 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
789 }
790
791 jmp(restart);
792 }
793
794 bind(loop);
795 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used
796 jcc(Assembler::notEqual, exception);
797
798 addptr(rcx, entry_size); // otherwise advance to next entry
799 bind(entry);
800 cmpptr(rcx, rbx); // check if bottom reached
801 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
802 }
803
804 bind(no_unlock);
805
806 // jvmti support
807 if (notify_jvmdi) {
808 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
809 } else {
810 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
811 }
812
813 // remove activation
814 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
815 leave(); // remove frame anchor
816 pop(ret_addr); // get return address
817 mov(rsp, rbx); // set sp to sender sp
818 if (UseSSE) {
819 // float and double are returned in xmm register in SSE-mode
820 if (state == ftos && UseSSE >= 1) {
821 subptr(rsp, wordSize);
822 fstp_s(Address(rsp, 0));
823 movflt(xmm0, Address(rsp, 0));
824 addptr(rsp, wordSize);
825 } else if (state == dtos && UseSSE >= 2) {
826 subptr(rsp, 2*wordSize);
827 fstp_d(Address(rsp, 0));
828 movdbl(xmm0, Address(rsp, 0));
829 addptr(rsp, 2*wordSize);
830 }
831 }
832 }
833
834 #endif /* !CC_INTERP */
835
836
837 // Lock object
838 //
839 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
840 // be initialized with object to lock
841 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
842 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
843
844 if (UseHeavyMonitors) {
845 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
846 } else {
847
848 Label done;
849
850 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
851 const Register obj_reg = rcx; // Will contain the oop
852
853 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
854 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
855 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
856
857 Label slow_case;
858
859 // Load object pointer into obj_reg %rcx
860 movptr(obj_reg, Address(lock_reg, obj_offset));
861
862 if (UseBiasedLocking) {
863 // Note: we use noreg for the temporary register since it's hard
864 // to come up with a free register on all incoming code paths
865 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
866 }
867
868 // Load immediate 1 into swap_reg %rax,
869 movptr(swap_reg, (int32_t)1);
870
871 // Load (object->mark() | 1) into swap_reg %rax,
872 orptr(swap_reg, Address(obj_reg, 0));
873
874 // Save (object->mark() | 1) into BasicLock's displaced header
875 movptr(Address(lock_reg, mark_offset), swap_reg);
876
877 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
878 if (os::is_MP()) {
879 lock();
880 }
881 cmpxchgptr(lock_reg, Address(obj_reg, 0));
882 if (PrintBiasedLockingStatistics) {
883 cond_inc32(Assembler::zero,
884 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
885 }
886 jcc(Assembler::zero, done);
887
888 // Test if the oopMark is an obvious stack pointer, i.e.,
889 // 1) (mark & 3) == 0, and
890 // 2) rsp <= mark < mark + os::pagesize()
891 //
892 // These 3 tests can be done by evaluating the following
893 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
894 // assuming both stack pointer and pagesize have their
895 // least significant 2 bits clear.
896 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
897 subptr(swap_reg, rsp);
898 andptr(swap_reg, 3 - os::vm_page_size());
899
900 // Save the test result, for recursive case, the result is zero
901 movptr(Address(lock_reg, mark_offset), swap_reg);
902
903 if (PrintBiasedLockingStatistics) {
904 cond_inc32(Assembler::zero,
905 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
906 }
907 jcc(Assembler::zero, done);
908
909 bind(slow_case);
910
911 // Call the runtime routine for slow case
912 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
913
914 bind(done);
915 }
916 }
917
918
919 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
920 //
921 // Argument: rdx : Points to BasicObjectLock structure for lock
922 // Throw an IllegalMonitorException if object is not locked by current thread
923 //
924 // Uses: rax, rbx, rcx, rdx
925 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
926 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
927
928 if (UseHeavyMonitors) {
929 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
930 } else {
931 Label done;
932
933 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
934 const Register header_reg = rbx; // Will contain the old oopMark
935 const Register obj_reg = rcx; // Will contain the oop
936
937 save_bcp(); // Save in case of exception
938
939 // Convert from BasicObjectLock structure to object and BasicLock structure
940 // Store the BasicLock address into %rax,
941 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
942
943 // Load oop into obj_reg(%rcx)
944 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
945
946 // Free entry
947 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
948
949 if (UseBiasedLocking) {
950 biased_locking_exit(obj_reg, header_reg, done);
951 }
952
953 // Load the old header from BasicLock structure
954 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
955
956 // Test for recursion
957 testptr(header_reg, header_reg);
958
959 // zero for recursive case
960 jcc(Assembler::zero, done);
961
962 // Atomic swap back the old header
963 if (os::is_MP()) lock();
964 cmpxchgptr(header_reg, Address(obj_reg, 0));
965
966 // zero for recursive case
967 jcc(Assembler::zero, done);
968
969 // Call the runtime routine for slow case.
970 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
971 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
972
973 bind(done);
974
975 restore_bcp();
976 }
977 }
978
979
980 #ifndef CC_INTERP
981
982 // Test ImethodDataPtr. If it is null, continue at the specified label
983 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
984 assert(ProfileInterpreter, "must be profiling interpreter");
985 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
986 testptr(mdp, mdp);
987 jcc(Assembler::zero, zero_continue);
988 }
989
990
991 // Set the method data pointer for the current bcp.
992 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
993 assert(ProfileInterpreter, "must be profiling interpreter");
994 Label zero_continue;
995 push(rax);
996 push(rbx);
997
998 get_method(rbx);
999 // Test MDO to avoid the call if it is NULL.
1000 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
1001 testptr(rax, rax);
1002 jcc(Assembler::zero, zero_continue);
1003
1004 // rbx,: method
1005 // rsi: bcp
1006 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
1007 // rax,: mdi
1008
1009 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
1010 testptr(rbx, rbx);
1011 jcc(Assembler::zero, zero_continue);
1012 addptr(rbx, in_bytes(methodDataOopDesc::data_offset()));
1013 addptr(rbx, rax);
1014 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx);
1015
1016 bind(zero_continue);
1017 pop(rbx);
1018 pop(rax);
1019 }
1020
1021 void InterpreterMacroAssembler::verify_method_data_pointer() {
1022 assert(ProfileInterpreter, "must be profiling interpreter");
1023 #ifdef ASSERT
1024 Label verify_continue;
1025 push(rax);
1026 push(rbx);
1027 push(rcx);
1028 push(rdx);
1029 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
1030 get_method(rbx);
1031
1032 // If the mdp is valid, it will point to a DataLayout header which is
1033 // consistent with the bcp. The converse is highly probable also.
1034 load_unsigned_word(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
1035 addptr(rdx, Address(rbx, methodOopDesc::const_offset()));
1036 lea(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
1037 cmpptr(rdx, rsi);
1038 jcc(Assembler::equal, verify_continue);
1039 // rbx,: method
1040 // rsi: bcp
1041 // rcx: mdp
1042 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
1043 bind(verify_continue);
1044 pop(rdx);
1045 pop(rcx);
1046 pop(rbx);
1047 pop(rax);
1048 #endif // ASSERT
1049 }
1050
1051
1052 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
1053 // %%% this seems to be used to store counter data which is surely 32bits
1054 // however 64bit side stores 64 bits which seems wrong
1055 assert(ProfileInterpreter, "must be profiling interpreter");
1056 Address data(mdp_in, constant);
1057 movptr(data, value);
1058 }
1059
1060
1061 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1062 int constant,
1063 bool decrement) {
1064 // Counter address
1065 Address data(mdp_in, constant);
1066
1067 increment_mdp_data_at(data, decrement);
1068 }
1069
1070
1071 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1072 bool decrement) {
1073
1074 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
1075 assert(ProfileInterpreter, "must be profiling interpreter");
1076
1077 // %%% 64bit treats this as 64 bit which seems unlikely
1078 if (decrement) {
1079 // Decrement the register. Set condition codes.
1080 addl(data, -DataLayout::counter_increment);
1081 // If the decrement causes the counter to overflow, stay negative
1082 Label L;
1083 jcc(Assembler::negative, L);
1084 addl(data, DataLayout::counter_increment);
1085 bind(L);
1086 } else {
1087 assert(DataLayout::counter_increment == 1,
1088 "flow-free idiom only works with 1");
1089 // Increment the register. Set carry flag.
1090 addl(data, DataLayout::counter_increment);
1091 // If the increment causes the counter to overflow, pull back by 1.
1092 sbbl(data, 0);
1093 }
1094 }
1095
1096
1097 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1098 Register reg,
1099 int constant,
1100 bool decrement) {
1101 Address data(mdp_in, reg, Address::times_1, constant);
1102
1103 increment_mdp_data_at(data, decrement);
1104 }
1105
1106
1107 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
1108 assert(ProfileInterpreter, "must be profiling interpreter");
1109 int header_offset = in_bytes(DataLayout::header_offset());
1110 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1111 // Set the flag
1112 orl(Address(mdp_in, header_offset), header_bits);
1113 }
1114
1115
1116
1117 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1118 int offset,
1119 Register value,
1120 Register test_value_out,
1121 Label& not_equal_continue) {
1122 assert(ProfileInterpreter, "must be profiling interpreter");
1123 if (test_value_out == noreg) {
1124 cmpptr(value, Address(mdp_in, offset));
1125 } else {
1126 // Put the test value into a register, so caller can use it:
1127 movptr(test_value_out, Address(mdp_in, offset));
1128 cmpptr(test_value_out, value);
1129 }
1130 jcc(Assembler::notEqual, not_equal_continue);
1131 }
1132
1133
1134 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
1135 assert(ProfileInterpreter, "must be profiling interpreter");
1136 Address disp_address(mdp_in, offset_of_disp);
1137 addptr(mdp_in,disp_address);
1138 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
1139 }
1140
1141
1142 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
1143 assert(ProfileInterpreter, "must be profiling interpreter");
1144 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1145 addptr(mdp_in, disp_address);
1146 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
1147 }
1148
1149
1150 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
1151 assert(ProfileInterpreter, "must be profiling interpreter");
1152 addptr(mdp_in, constant);
1153 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
1154 }
1155
1156
1157 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1158 assert(ProfileInterpreter, "must be profiling interpreter");
1159 push(return_bci); // save/restore across call_VM
1160 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
1161 pop(return_bci);
1162 }
1163
1164
1165 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
1166 if (ProfileInterpreter) {
1167 Label profile_continue;
1168
1169 // If no method data exists, go to profile_continue.
1170 // Otherwise, assign to mdp
1171 test_method_data_pointer(mdp, profile_continue);
1172
1173 // We are taking a branch. Increment the taken count.
1174 // We inline increment_mdp_data_at to return bumped_count in a register
1175 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1176 Address data(mdp, in_bytes(JumpData::taken_offset()));
1177
1178 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
1179 movl(bumped_count,data);
1180 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
1181 addl(bumped_count, DataLayout::counter_increment);
1182 sbbl(bumped_count, 0);
1183 movl(data,bumped_count); // Store back out
1184
1185 // The method data pointer needs to be updated to reflect the new target.
1186 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1187 bind (profile_continue);
1188 }
1189 }
1190
1191
1192 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1193 if (ProfileInterpreter) {
1194 Label profile_continue;
1195
1196 // If no method data exists, go to profile_continue.
1197 test_method_data_pointer(mdp, profile_continue);
1198
1199 // We are taking a branch. Increment the not taken count.
1200 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1201
1202 // The method data pointer needs to be updated to correspond to the next bytecode
1203 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1204 bind (profile_continue);
1205 }
1206 }
1207
1208
1209 void InterpreterMacroAssembler::profile_call(Register mdp) {
1210 if (ProfileInterpreter) {
1211 Label profile_continue;
1212
1213 // If no method data exists, go to profile_continue.
1214 test_method_data_pointer(mdp, profile_continue);
1215
1216 // We are making a call. Increment the count.
1217 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1218
1219 // The method data pointer needs to be updated to reflect the new target.
1220 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1221 bind (profile_continue);
1222 }
1223 }
1224
1225
1226 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1227 if (ProfileInterpreter) {
1228 Label profile_continue;
1229
1230 // If no method data exists, go to profile_continue.
1231 test_method_data_pointer(mdp, profile_continue);
1232
1233 // We are making a call. Increment the count.
1234 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1235
1236 // The method data pointer needs to be updated to reflect the new target.
1237 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1238 bind (profile_continue);
1239 }
1240 }
1241
1242
1243 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp, Register reg2) {
1244 if (ProfileInterpreter) {
1245 Label profile_continue;
1246
1247 // If no method data exists, go to profile_continue.
1248 test_method_data_pointer(mdp, profile_continue);
1249
1250 // We are making a call. Increment the count.
1251 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1252
1253 // Record the receiver type.
1254 record_klass_in_profile(receiver, mdp, reg2);
1255
1256 // The method data pointer needs to be updated to reflect the new target.
1257 update_mdp_by_constant(mdp,
1258 in_bytes(VirtualCallData::
1259 virtual_call_data_size()));
1260 bind(profile_continue);
1261 }
1262 }
1263
1264
1265 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1266 Register receiver, Register mdp,
1267 Register reg2,
1268 int start_row, Label& done) {
1269 int last_row = VirtualCallData::row_limit() - 1;
1270 assert(start_row <= last_row, "must be work left to do");
1271 // Test this row for both the receiver and for null.
1272 // Take any of three different outcomes:
1273 // 1. found receiver => increment count and goto done
1274 // 2. found null => keep looking for case 1, maybe allocate this cell
1275 // 3. found something else => keep looking for cases 1 and 2
1276 // Case 3 is handled by a recursive call.
1277 for (int row = start_row; row <= last_row; row++) {
1278 Label next_test;
1279 bool test_for_null_also = (row == start_row);
1280
1281 // See if the receiver is receiver[n].
1282 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1283 test_mdp_data_at(mdp, recvr_offset, receiver,
1284 (test_for_null_also ? reg2 : noreg),
1285 next_test);
1286 // (Reg2 now contains the receiver from the CallData.)
1287
1288 // The receiver is receiver[n]. Increment count[n].
1289 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1290 increment_mdp_data_at(mdp, count_offset);
1291 jmp(done);
1292 bind(next_test);
1293
1294 if (row == start_row) {
1295 // Failed the equality check on receiver[n]... Test for null.
1296 testptr(reg2, reg2);
1297 if (start_row == last_row) {
1298 // The only thing left to do is handle the null case.
1299 jcc(Assembler::notZero, done);
1300 break;
1301 }
1302 // Since null is rare, make it be the branch-taken case.
1303 Label found_null;
1304 jcc(Assembler::zero, found_null);
1305
1306 // Put all the "Case 3" tests here.
1307 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done);
1308
1309 // Found a null. Keep searching for a matching receiver,
1310 // but remember that this is an empty (unused) slot.
1311 bind(found_null);
1312 }
1313 }
1314
1315 // In the fall-through case, we found no matching receiver, but we
1316 // observed the receiver[start_row] is NULL.
1317
1318 // Fill in the receiver field and increment the count.
1319 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1320 set_mdp_data_at(mdp, recvr_offset, receiver);
1321 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1322 movptr(reg2, (int32_t)DataLayout::counter_increment);
1323 set_mdp_data_at(mdp, count_offset, reg2);
1324 jmp(done);
1325 }
1326
1327 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1328 Register mdp,
1329 Register reg2) {
1330 assert(ProfileInterpreter, "must be profiling");
1331 Label done;
1332
1333 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done);
1334
1335 bind (done);
1336 }
1337
1338 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
1339 if (ProfileInterpreter) {
1340 Label profile_continue;
1341 uint row;
1342
1343 // If no method data exists, go to profile_continue.
1344 test_method_data_pointer(mdp, profile_continue);
1345
1346 // Update the total ret count.
1347 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1348
1349 for (row = 0; row < RetData::row_limit(); row++) {
1350 Label next_test;
1351
1352 // See if return_bci is equal to bci[n]:
1353 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
1354 noreg, next_test);
1355
1356 // return_bci is equal to bci[n]. Increment the count.
1357 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1358
1359 // The method data pointer needs to be updated to reflect the new target.
1360 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
1361 jmp(profile_continue);
1362 bind(next_test);
1363 }
1364
1365 update_mdp_for_ret(return_bci);
1366
1367 bind (profile_continue);
1368 }
1369 }
1370
1371
1372 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1373 if (ProfileInterpreter) {
1374 Label profile_continue;
1375
1376 // If no method data exists, go to profile_continue.
1377 test_method_data_pointer(mdp, profile_continue);
1378
1379 // The method data pointer needs to be updated.
1380 int mdp_delta = in_bytes(BitData::bit_data_size());
1381 if (TypeProfileCasts) {
1382 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1383 }
1384 update_mdp_by_constant(mdp, mdp_delta);
1385
1386 bind (profile_continue);
1387 }
1388 }
1389
1390
1391 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1392 if (ProfileInterpreter && TypeProfileCasts) {
1393 Label profile_continue;
1394
1395 // If no method data exists, go to profile_continue.
1396 test_method_data_pointer(mdp, profile_continue);
1397
1398 int count_offset = in_bytes(CounterData::count_offset());
1399 // Back up the address, since we have already bumped the mdp.
1400 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1401
1402 // *Decrement* the counter. We expect to see zero or small negatives.
1403 increment_mdp_data_at(mdp, count_offset, true);
1404
1405 bind (profile_continue);
1406 }
1407 }
1408
1409
1410 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
1411 {
1412 if (ProfileInterpreter) {
1413 Label profile_continue;
1414
1415 // If no method data exists, go to profile_continue.
1416 test_method_data_pointer(mdp, profile_continue);
1417
1418 // The method data pointer needs to be updated.
1419 int mdp_delta = in_bytes(BitData::bit_data_size());
1420 if (TypeProfileCasts) {
1421 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1422
1423 // Record the object type.
1424 record_klass_in_profile(klass, mdp, reg2);
1425 assert(reg2 == rdi, "we know how to fix this blown reg");
1426 restore_locals(); // Restore EDI
1427 }
1428 update_mdp_by_constant(mdp, mdp_delta);
1429
1430 bind(profile_continue);
1431 }
1432 }
1433
1434
1435 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1436 if (ProfileInterpreter) {
1437 Label profile_continue;
1438
1439 // If no method data exists, go to profile_continue.
1440 test_method_data_pointer(mdp, profile_continue);
1441
1442 // Update the default case count
1443 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1444
1445 // The method data pointer needs to be updated.
1446 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
1447
1448 bind (profile_continue);
1449 }
1450 }
1451
1452
1453 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
1454 if (ProfileInterpreter) {
1455 Label profile_continue;
1456
1457 // If no method data exists, go to profile_continue.
1458 test_method_data_pointer(mdp, profile_continue);
1459
1460 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1461 movptr(reg2, (int32_t)in_bytes(MultiBranchData::per_case_size()));
1462 // index is positive and so should have correct value if this code were
1463 // used on 64bits
1464 imulptr(index, reg2);
1465 addptr(index, in_bytes(MultiBranchData::case_array_offset()));
1466
1467 // Update the case count
1468 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1469
1470 // The method data pointer needs to be updated.
1471 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
1472
1473 bind (profile_continue);
1474 }
1475 }
1476
1477 #endif // !CC_INTERP
1478
1479
1480
1481 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1482 if (state == atos) MacroAssembler::verify_oop(reg);
1483 }
1484
1485
1486 #ifndef CC_INTERP
1487 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1488 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1489 }
1490
1491 #endif /* CC_INTERP */
1492
1493
1494 void InterpreterMacroAssembler::notify_method_entry() {
1495 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1496 // track stack depth. If it is possible to enter interp_only_mode we add
1497 // the code to check if the event should be sent.
1498 if (JvmtiExport::can_post_interpreter_events()) {
1499 Label L;
1500 get_thread(rcx);
1501 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1502 testl(rcx,rcx);
1503 jcc(Assembler::zero, L);
1504 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
1505 bind(L);
1506 }
1507
1508 {
1509 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1510 get_thread(rcx);
1511 get_method(rbx);
1512 call_VM_leaf(
1513 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
1514 }
1515 }
1516
1517
1518 void InterpreterMacroAssembler::notify_method_exit(
1519 TosState state, NotifyMethodExitMode mode) {
1520 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1521 // track stack depth. If it is possible to enter interp_only_mode we add
1522 // the code to check if the event should be sent.
1523 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1524 Label L;
1525 // Note: frame::interpreter_frame_result has a dependency on how the
1526 // method result is saved across the call to post_method_exit. If this
1527 // is changed then the interpreter_frame_result implementation will
1528 // need to be updated too.
1529
1530 // For c++ interpreter the result is always stored at a known location in the frame
1531 // template interpreter will leave it on the top of the stack.
1532 NOT_CC_INTERP(push(state);)
1533 get_thread(rcx);
1534 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1535 testl(rcx,rcx);
1536 jcc(Assembler::zero, L);
1537 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1538 bind(L);
1539 NOT_CC_INTERP(pop(state);)
1540 }
1541
1542 {
1543 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1544 NOT_CC_INTERP(push(state));
1545 get_thread(rbx);
1546 get_method(rcx);
1547 call_VM_leaf(
1548 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1549 rbx, rcx);
1550 NOT_CC_INTERP(pop(state));
1551 }
1552 }