1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_interp_masm_x86_64.cpp.incl"
27
28
29 // Implementation of InterpreterMacroAssembler
30
31 #ifdef CC_INTERP
32 void InterpreterMacroAssembler::get_method(Register reg) {
33 movptr(reg, Address(rbp, -((int)sizeof(BytecodeInterpreter) + 2 * wordSize)));
34 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
35 }
36 #endif // CC_INTERP
37
38 #ifndef CC_INTERP
39
40 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
41 int number_of_arguments) {
42 // interpreter specific
43 //
44 // Note: No need to save/restore bcp & locals (r13 & r14) pointer
45 // since these are callee saved registers and no blocking/
46 // GC can happen in leaf calls.
47 // Further Note: DO NOT save/restore bcp/locals. If a caller has
48 // already saved them so that it can use esi/edi as temporaries
49 // then a save/restore here will DESTROY the copy the caller
50 // saved! There used to be a save_bcp() that only happened in
51 // the ASSERT path (no restore_bcp). Which caused bizarre failures
52 // when jvm built with ASSERTs.
53 #ifdef ASSERT
54 {
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:"
59 " last_sp != NULL");
60 bind(L);
61 }
62 #endif
63 // super call
64 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
65 // interpreter specific
66 // Used to ASSERT that r13/r14 were equal to frame's bcp/locals
67 // but since they may not have been saved (and we don't want to
68 // save thme here (see note above) the assert is invalid.
69 }
70
71 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
72 Register java_thread,
73 Register last_java_sp,
74 address entry_point,
75 int number_of_arguments,
76 bool check_exceptions) {
77 // interpreter specific
78 //
79 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
80 // really make a difference for these runtime calls, since they are
81 // slow anyway. Btw., bcp must be saved/restored since it may change
82 // due to GC.
83 // assert(java_thread == noreg , "not expecting a precomputed java thread");
84 save_bcp();
85 #ifdef ASSERT
86 {
87 Label L;
88 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
89 jcc(Assembler::equal, L);
90 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
91 " last_sp != NULL");
92 bind(L);
93 }
94 #endif /* ASSERT */
95 // super call
96 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
97 entry_point, number_of_arguments,
98 check_exceptions);
99 // interpreter specific
100 restore_bcp();
101 restore_locals();
102 }
103
104
105 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
106 if (JvmtiExport::can_pop_frame()) {
107 Label L;
108 // Initiate popframe handling only if it is not already being
109 // processed. If the flag has the popframe_processing bit set, it
110 // means that this code is called *during* popframe handling - we
111 // don't want to reenter.
112 // This method is only called just after the call into the vm in
113 // call_VM_base, so the arg registers are available.
114 movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset()));
115 testl(c_rarg0, JavaThread::popframe_pending_bit);
116 jcc(Assembler::zero, L);
117 testl(c_rarg0, JavaThread::popframe_processing_bit);
118 jcc(Assembler::notZero, L);
119 // Call Interpreter::remove_activation_preserving_args_entry() to get the
120 // address of the same-named entrypoint in the generated interpreter code.
121 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
122 jmp(rax);
123 bind(L);
124 }
125 }
126
127
128 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
129 movptr(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
130 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
131 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
132 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
133 switch (state) {
134 case atos: movptr(rax, oop_addr);
135 movptr(oop_addr, (int32_t)NULL_WORD);
136 verify_oop(rax, state); break;
137 case ltos: movptr(rax, val_addr); break;
138 case btos: // fall through
139 case ctos: // fall through
140 case stos: // fall through
141 case itos: movl(rax, val_addr); break;
142 case ftos: movflt(xmm0, val_addr); break;
143 case dtos: movdbl(xmm0, val_addr); break;
144 case vtos: /* nothing to do */ break;
145 default : ShouldNotReachHere();
146 }
147 // Clean up tos value in the thread object
148 movl(tos_addr, (int) ilgl);
149 movl(val_addr, (int32_t) NULL_WORD);
150 }
151
152
153 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
154 if (JvmtiExport::can_force_early_return()) {
155 Label L;
156 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
157 testptr(c_rarg0, c_rarg0);
158 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
159
160 // Initiate earlyret handling only if it is not already being processed.
161 // If the flag has the earlyret_processing bit set, it means that this code
162 // is called *during* earlyret handling - we don't want to reenter.
163 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset()));
164 cmpl(c_rarg0, JvmtiThreadState::earlyret_pending);
165 jcc(Assembler::notEqual, L);
166
167 // Call Interpreter::remove_activation_early_entry() to get the address of the
168 // same-named entrypoint in the generated interpreter code.
169 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
170 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset()));
171 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0);
172 jmp(rax);
173 bind(L);
174 }
175 }
176
177
178 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(
179 Register reg,
180 int bcp_offset) {
181 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
182 movl(reg, Address(r13, bcp_offset));
183 bswapl(reg);
184 shrl(reg, 16);
185 }
186
187
188 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
189 int bcp_offset,
190 size_t index_size) {
191 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
192 if (index_size == sizeof(u2)) {
193 load_unsigned_short(index, Address(r13, bcp_offset));
194 } else if (index_size == sizeof(u4)) {
195 assert(EnableInvokeDynamic, "giant index used only for EnableInvokeDynamic");
196 movl(index, Address(r13, bcp_offset));
197 // Check if the secondary index definition is still ~x, otherwise
198 // we have to change the following assembler code to calculate the
199 // plain index.
200 assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line");
201 notl(index); // convert to plain index
202 } else if (index_size == sizeof(u1)) {
203 assert(EnableMethodHandles, "tiny index used only for EnableMethodHandles");
204 load_unsigned_byte(index, Address(r13, bcp_offset));
205 } else {
206 ShouldNotReachHere();
207 }
208 }
209
210
211 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
212 Register index,
213 int bcp_offset,
214 size_t index_size) {
215 assert(cache != index, "must use different registers");
216 get_cache_index_at_bcp(index, bcp_offset, index_size);
217 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
218 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
219 // convert from field index to ConstantPoolCacheEntry index
220 shll(index, 2);
221 }
222
223
224 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
225 Register tmp,
226 int bcp_offset,
227 size_t index_size) {
228 assert(cache != tmp, "must use different register");
229 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
230 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
231 // convert from field index to ConstantPoolCacheEntry index
232 // and from word offset to byte offset
233 shll(tmp, 2 + LogBytesPerWord);
234 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
235 // skip past the header
236 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset()));
237 addptr(cache, tmp); // construct pointer to cache entry
238 }
239
240
241 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
242 // subtype of super_klass.
243 //
244 // Args:
245 // rax: superklass
246 // Rsub_klass: subklass
247 //
248 // Kills:
249 // rcx, rdi
250 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
251 Label& ok_is_subtype) {
252 assert(Rsub_klass != rax, "rax holds superklass");
253 assert(Rsub_klass != r14, "r14 holds locals");
254 assert(Rsub_klass != r13, "r13 holds bcp");
255 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
256 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
257
258 // Profile the not-null value's klass.
259 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
260
261 // Do the check.
262 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
263
264 // Profile the failure of the check.
265 profile_typecheck_failed(rcx); // blows rcx
266 }
267
268
269
270 // Java Expression Stack
271
272 void InterpreterMacroAssembler::pop_ptr(Register r) {
273 pop(r);
274 }
275
276 void InterpreterMacroAssembler::pop_i(Register r) {
277 // XXX can't use pop currently, upper half non clean
278 movl(r, Address(rsp, 0));
279 addptr(rsp, wordSize);
280 }
281
282 void InterpreterMacroAssembler::pop_l(Register r) {
283 movq(r, Address(rsp, 0));
284 addptr(rsp, 2 * Interpreter::stackElementSize);
285 }
286
287 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
288 movflt(r, Address(rsp, 0));
289 addptr(rsp, wordSize);
290 }
291
292 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
293 movdbl(r, Address(rsp, 0));
294 addptr(rsp, 2 * Interpreter::stackElementSize);
295 }
296
297 void InterpreterMacroAssembler::push_ptr(Register r) {
298 push(r);
299 }
300
301 void InterpreterMacroAssembler::push_i(Register r) {
302 push(r);
303 }
304
305 void InterpreterMacroAssembler::push_l(Register r) {
306 subptr(rsp, 2 * wordSize);
307 movq(Address(rsp, 0), r);
308 }
309
310 void InterpreterMacroAssembler::push_f(XMMRegister r) {
311 subptr(rsp, wordSize);
312 movflt(Address(rsp, 0), r);
313 }
314
315 void InterpreterMacroAssembler::push_d(XMMRegister r) {
316 subptr(rsp, 2 * wordSize);
317 movdbl(Address(rsp, 0), r);
318 }
319
320 void InterpreterMacroAssembler::pop(TosState state) {
321 switch (state) {
322 case atos: pop_ptr(); break;
323 case btos:
324 case ctos:
325 case stos:
326 case itos: pop_i(); break;
327 case ltos: pop_l(); break;
328 case ftos: pop_f(); break;
329 case dtos: pop_d(); break;
330 case vtos: /* nothing to do */ break;
331 default: ShouldNotReachHere();
332 }
333 verify_oop(rax, state);
334 }
335
336 void InterpreterMacroAssembler::push(TosState state) {
337 verify_oop(rax, state);
338 switch (state) {
339 case atos: push_ptr(); break;
340 case btos:
341 case ctos:
342 case stos:
343 case itos: push_i(); break;
344 case ltos: push_l(); break;
345 case ftos: push_f(); break;
346 case dtos: push_d(); break;
347 case vtos: /* nothing to do */ break;
348 default : ShouldNotReachHere();
349 }
350 }
351
352
353 // Helpers for swap and dup
354 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
355 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
356 }
357
358 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
359 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
360 }
361
362
363 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) {
364 MacroAssembler::call_VM_leaf_base(entry_point, 0);
365 }
366
367
368 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
369 Register arg_1) {
370 if (c_rarg0 != arg_1) {
371 mov(c_rarg0, arg_1);
372 }
373 MacroAssembler::call_VM_leaf_base(entry_point, 1);
374 }
375
376
377 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
378 Register arg_1,
379 Register arg_2) {
380 assert(c_rarg0 != arg_2, "smashed argument");
381 assert(c_rarg1 != arg_1, "smashed argument");
382 if (c_rarg0 != arg_1) {
383 mov(c_rarg0, arg_1);
384 }
385 if (c_rarg1 != arg_2) {
386 mov(c_rarg1, arg_2);
387 }
388 MacroAssembler::call_VM_leaf_base(entry_point, 2);
389 }
390
391 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
392 Register arg_1,
393 Register arg_2,
394 Register arg_3) {
395 assert(c_rarg0 != arg_2, "smashed argument");
396 assert(c_rarg0 != arg_3, "smashed argument");
397 assert(c_rarg1 != arg_1, "smashed argument");
398 assert(c_rarg1 != arg_3, "smashed argument");
399 assert(c_rarg2 != arg_1, "smashed argument");
400 assert(c_rarg2 != arg_2, "smashed argument");
401 if (c_rarg0 != arg_1) {
402 mov(c_rarg0, arg_1);
403 }
404 if (c_rarg1 != arg_2) {
405 mov(c_rarg1, arg_2);
406 }
407 if (c_rarg2 != arg_3) {
408 mov(c_rarg2, arg_3);
409 }
410 MacroAssembler::call_VM_leaf_base(entry_point, 3);
411 }
412
413 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
414 // set sender sp
415 lea(r13, Address(rsp, wordSize));
416 // record last_sp
417 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13);
418 }
419
420
421 // Jump to from_interpreted entry of a call unless single stepping is possible
422 // in this thread in which case we must call the i2i entry
423 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
424 prepare_to_jump_from_interpreted();
425
426 if (JvmtiExport::can_post_interpreter_events()) {
427 Label run_compiled_code;
428 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
429 // compiled code in threads for which the event is enabled. Check here for
430 // interp_only_mode if these events CAN be enabled.
431 get_thread(temp);
432 // interp_only is an int, on little endian it is sufficient to test the byte only
433 // Is a cmpl faster (ce
434 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
435 jcc(Assembler::zero, run_compiled_code);
436 jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
437 bind(run_compiled_code);
438 }
439
440 jmp(Address(method, methodOopDesc::from_interpreted_offset()));
441
442 }
443
444
445 // The following two routines provide a hook so that an implementation
446 // can schedule the dispatch in two parts. amd64 does not do this.
447 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
448 // Nothing amd64 specific to be done here
449 }
450
451 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
452 dispatch_next(state, step);
453 }
454
455 void InterpreterMacroAssembler::dispatch_base(TosState state,
456 address* table,
457 bool verifyoop) {
458 verify_FPU(1, state);
459 if (VerifyActivationFrameSize) {
460 Label L;
461 mov(rcx, rbp);
462 subptr(rcx, rsp);
463 int32_t min_frame_size =
464 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
465 wordSize;
466 cmpptr(rcx, (int32_t)min_frame_size);
467 jcc(Assembler::greaterEqual, L);
468 stop("broken stack frame");
469 bind(L);
470 }
471 if (verifyoop) {
472 verify_oop(rax, state);
473 }
474 lea(rscratch1, ExternalAddress((address)table));
475 jmp(Address(rscratch1, rbx, Address::times_8));
476 }
477
478 void InterpreterMacroAssembler::dispatch_only(TosState state) {
479 dispatch_base(state, Interpreter::dispatch_table(state));
480 }
481
482 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
483 dispatch_base(state, Interpreter::normal_table(state));
484 }
485
486 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
487 dispatch_base(state, Interpreter::normal_table(state), false);
488 }
489
490
491 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
492 // load next bytecode (load before advancing r13 to prevent AGI)
493 load_unsigned_byte(rbx, Address(r13, step));
494 // advance r13
495 increment(r13, step);
496 dispatch_base(state, Interpreter::dispatch_table(state));
497 }
498
499 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
500 // load current bytecode
501 load_unsigned_byte(rbx, Address(r13, 0));
502 dispatch_base(state, table);
503 }
504
505 // remove activation
506 //
507 // Unlock the receiver if this is a synchronized method.
508 // Unlock any Java monitors from syncronized blocks.
509 // Remove the activation from the stack.
510 //
511 // If there are locked Java monitors
512 // If throw_monitor_exception
513 // throws IllegalMonitorStateException
514 // Else if install_monitor_exception
515 // installs IllegalMonitorStateException
516 // Else
517 // no error processing
518 void InterpreterMacroAssembler::remove_activation(
519 TosState state,
520 Register ret_addr,
521 bool throw_monitor_exception,
522 bool install_monitor_exception,
523 bool notify_jvmdi) {
524 // Note: Registers rdx xmm0 may be in use for the
525 // result check if synchronized method
526 Label unlocked, unlock, no_unlock;
527
528 // get the value of _do_not_unlock_if_synchronized into rdx
529 const Address do_not_unlock_if_synchronized(r15_thread,
530 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
531 movbool(rdx, do_not_unlock_if_synchronized);
532 movbool(do_not_unlock_if_synchronized, false); // reset the flag
533
534 // get method access flags
535 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
536 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset()));
537 testl(rcx, JVM_ACC_SYNCHRONIZED);
538 jcc(Assembler::zero, unlocked);
539
540 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
541 // is set.
542 testbool(rdx);
543 jcc(Assembler::notZero, no_unlock);
544
545 // unlock monitor
546 push(state); // save result
547
548 // BasicObjectLock will be first in list, since this is a
549 // synchronized method. However, need to check that the object has
550 // not been unlocked by an explicit monitorexit bytecode.
551 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
552 wordSize - (int) sizeof(BasicObjectLock));
553 // We use c_rarg1 so that if we go slow path it will be the correct
554 // register for unlock_object to pass to VM directly
555 lea(c_rarg1, monitor); // address of first monitor
556
557 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
558 testptr(rax, rax);
559 jcc(Assembler::notZero, unlock);
560
561 pop(state);
562 if (throw_monitor_exception) {
563 // Entry already unlocked, need to throw exception
564 call_VM(noreg, CAST_FROM_FN_PTR(address,
565 InterpreterRuntime::throw_illegal_monitor_state_exception));
566 should_not_reach_here();
567 } else {
568 // Monitor already unlocked during a stack unroll. If requested,
569 // install an illegal_monitor_state_exception. Continue with
570 // stack unrolling.
571 if (install_monitor_exception) {
572 call_VM(noreg, CAST_FROM_FN_PTR(address,
573 InterpreterRuntime::new_illegal_monitor_state_exception));
574 }
575 jmp(unlocked);
576 }
577
578 bind(unlock);
579 unlock_object(c_rarg1);
580 pop(state);
581
582 // Check that for block-structured locking (i.e., that all locked
583 // objects has been unlocked)
584 bind(unlocked);
585
586 // rax: Might contain return value
587
588 // Check that all monitors are unlocked
589 {
590 Label loop, exception, entry, restart;
591 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
592 const Address monitor_block_top(
593 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
594 const Address monitor_block_bot(
595 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
596
597 bind(restart);
598 // We use c_rarg1 so that if we go slow path it will be the correct
599 // register for unlock_object to pass to VM directly
600 movptr(c_rarg1, monitor_block_top); // points to current entry, starting
601 // with top-most entry
602 lea(rbx, monitor_block_bot); // points to word before bottom of
603 // monitor block
604 jmp(entry);
605
606 // Entry already locked, need to throw exception
607 bind(exception);
608
609 if (throw_monitor_exception) {
610 // Throw exception
611 MacroAssembler::call_VM(noreg,
612 CAST_FROM_FN_PTR(address, InterpreterRuntime::
613 throw_illegal_monitor_state_exception));
614 should_not_reach_here();
615 } else {
616 // Stack unrolling. Unlock object and install illegal_monitor_exception.
617 // Unlock does not block, so don't have to worry about the frame.
618 // We don't have to preserve c_rarg1 since we are going to throw an exception.
619
620 push(state);
621 unlock_object(c_rarg1);
622 pop(state);
623
624 if (install_monitor_exception) {
625 call_VM(noreg, CAST_FROM_FN_PTR(address,
626 InterpreterRuntime::
627 new_illegal_monitor_state_exception));
628 }
629
630 jmp(restart);
631 }
632
633 bind(loop);
634 // check if current entry is used
635 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
636 jcc(Assembler::notEqual, exception);
637
638 addptr(c_rarg1, entry_size); // otherwise advance to next entry
639 bind(entry);
640 cmpptr(c_rarg1, rbx); // check if bottom reached
641 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
642 }
643
644 bind(no_unlock);
645
646 // jvmti support
647 if (notify_jvmdi) {
648 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
649 } else {
650 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
651 }
652
653 // remove activation
654 // get sender sp
655 movptr(rbx,
656 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
657 leave(); // remove frame anchor
658 pop(ret_addr); // get return address
659 mov(rsp, rbx); // set sp to sender sp
660 }
661
662 #endif // C_INTERP
663
664 // Lock object
665 //
666 // Args:
667 // c_rarg1: BasicObjectLock to be used for locking
668 //
669 // Kills:
670 // rax
671 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs)
672 // rscratch1, rscratch2 (scratch regs)
673 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
674 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
675
676 if (UseHeavyMonitors) {
677 call_VM(noreg,
678 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
679 lock_reg);
680 } else {
681 Label done;
682
683 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
684 const Register obj_reg = c_rarg3; // Will contain the oop
685
686 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
687 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
688 const int mark_offset = lock_offset +
689 BasicLock::displaced_header_offset_in_bytes();
690
691 Label slow_case;
692
693 // Load object pointer into obj_reg %c_rarg3
694 movptr(obj_reg, Address(lock_reg, obj_offset));
695
696 if (UseBiasedLocking) {
697 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case);
698 }
699
700 // Load immediate 1 into swap_reg %rax
701 movl(swap_reg, 1);
702
703 // Load (object->mark() | 1) into swap_reg %rax
704 orptr(swap_reg, Address(obj_reg, 0));
705
706 // Save (object->mark() | 1) into BasicLock's displaced header
707 movptr(Address(lock_reg, mark_offset), swap_reg);
708
709 assert(lock_offset == 0,
710 "displached header must be first word in BasicObjectLock");
711
712 if (os::is_MP()) lock();
713 cmpxchgptr(lock_reg, Address(obj_reg, 0));
714 if (PrintBiasedLockingStatistics) {
715 cond_inc32(Assembler::zero,
716 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
717 }
718 jcc(Assembler::zero, done);
719
720 // Test if the oopMark is an obvious stack pointer, i.e.,
721 // 1) (mark & 7) == 0, and
722 // 2) rsp <= mark < mark + os::pagesize()
723 //
724 // These 3 tests can be done by evaluating the following
725 // expression: ((mark - rsp) & (7 - os::vm_page_size())),
726 // assuming both stack pointer and pagesize have their
727 // least significant 3 bits clear.
728 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
729 subptr(swap_reg, rsp);
730 andptr(swap_reg, 7 - os::vm_page_size());
731
732 // Save the test result, for recursive case, the result is zero
733 movptr(Address(lock_reg, mark_offset), swap_reg);
734
735 if (PrintBiasedLockingStatistics) {
736 cond_inc32(Assembler::zero,
737 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
738 }
739 jcc(Assembler::zero, done);
740
741 bind(slow_case);
742
743 // Call the runtime routine for slow case
744 call_VM(noreg,
745 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
746 lock_reg);
747
748 bind(done);
749 }
750 }
751
752
753 // Unlocks an object. Used in monitorexit bytecode and
754 // remove_activation. Throws an IllegalMonitorException if object is
755 // not locked by current thread.
756 //
757 // Args:
758 // c_rarg1: BasicObjectLock for lock
759 //
760 // Kills:
761 // rax
762 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
763 // rscratch1, rscratch2 (scratch regs)
764 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
765 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1");
766
767 if (UseHeavyMonitors) {
768 call_VM(noreg,
769 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
770 lock_reg);
771 } else {
772 Label done;
773
774 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
775 const Register header_reg = c_rarg2; // Will contain the old oopMark
776 const Register obj_reg = c_rarg3; // Will contain the oop
777
778 save_bcp(); // Save in case of exception
779
780 // Convert from BasicObjectLock structure to object and BasicLock
781 // structure Store the BasicLock address into %rax
782 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
783
784 // Load oop into obj_reg(%c_rarg3)
785 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
786
787 // Free entry
788 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
789
790 if (UseBiasedLocking) {
791 biased_locking_exit(obj_reg, header_reg, done);
792 }
793
794 // Load the old header from BasicLock structure
795 movptr(header_reg, Address(swap_reg,
796 BasicLock::displaced_header_offset_in_bytes()));
797
798 // Test for recursion
799 testptr(header_reg, header_reg);
800
801 // zero for recursive case
802 jcc(Assembler::zero, done);
803
804 // Atomic swap back the old header
805 if (os::is_MP()) lock();
806 cmpxchgptr(header_reg, Address(obj_reg, 0));
807
808 // zero for recursive case
809 jcc(Assembler::zero, done);
810
811 // Call the runtime routine for slow case.
812 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
813 obj_reg); // restore obj
814 call_VM(noreg,
815 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
816 lock_reg);
817
818 bind(done);
819
820 restore_bcp();
821 }
822 }
823
824 #ifndef CC_INTERP
825
826 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
827 Label& zero_continue) {
828 assert(ProfileInterpreter, "must be profiling interpreter");
829 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
830 testptr(mdp, mdp);
831 jcc(Assembler::zero, zero_continue);
832 }
833
834
835 // Set the method data pointer for the current bcp.
836 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
837 assert(ProfileInterpreter, "must be profiling interpreter");
838 Label zero_continue;
839 push(rax);
840 push(rbx);
841
842 get_method(rbx);
843 // Test MDO to avoid the call if it is NULL.
844 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
845 testptr(rax, rax);
846 jcc(Assembler::zero, zero_continue);
847
848 // rbx: method
849 // r13: bcp
850 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13);
851 // rax: mdi
852
853 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
854 testptr(rbx, rbx);
855 jcc(Assembler::zero, zero_continue);
856 addptr(rbx, in_bytes(methodDataOopDesc::data_offset()));
857 addptr(rbx, rax);
858 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rbx);
859
860 bind(zero_continue);
861 pop(rbx);
862 pop(rax);
863 }
864
865 void InterpreterMacroAssembler::verify_method_data_pointer() {
866 assert(ProfileInterpreter, "must be profiling interpreter");
867 #ifdef ASSERT
868 Label verify_continue;
869 push(rax);
870 push(rbx);
871 push(c_rarg3);
872 push(c_rarg2);
873 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue
874 get_method(rbx);
875
876 // If the mdp is valid, it will point to a DataLayout header which is
877 // consistent with the bcp. The converse is highly probable also.
878 load_unsigned_short(c_rarg2,
879 Address(c_rarg3, in_bytes(DataLayout::bci_offset())));
880 addptr(c_rarg2, Address(rbx, methodOopDesc::const_offset()));
881 lea(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset()));
882 cmpptr(c_rarg2, r13);
883 jcc(Assembler::equal, verify_continue);
884 // rbx: method
885 // r13: bcp
886 // c_rarg3: mdp
887 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
888 rbx, r13, c_rarg3);
889 bind(verify_continue);
890 pop(c_rarg2);
891 pop(c_rarg3);
892 pop(rbx);
893 pop(rax);
894 #endif // ASSERT
895 }
896
897
898 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
899 int constant,
900 Register value) {
901 assert(ProfileInterpreter, "must be profiling interpreter");
902 Address data(mdp_in, constant);
903 movptr(data, value);
904 }
905
906
907 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
908 int constant,
909 bool decrement) {
910 // Counter address
911 Address data(mdp_in, constant);
912
913 increment_mdp_data_at(data, decrement);
914 }
915
916 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
917 bool decrement) {
918 assert(ProfileInterpreter, "must be profiling interpreter");
919 // %%% this does 64bit counters at best it is wasting space
920 // at worst it is a rare bug when counters overflow
921
922 if (decrement) {
923 // Decrement the register. Set condition codes.
924 addptr(data, (int32_t) -DataLayout::counter_increment);
925 // If the decrement causes the counter to overflow, stay negative
926 Label L;
927 jcc(Assembler::negative, L);
928 addptr(data, (int32_t) DataLayout::counter_increment);
929 bind(L);
930 } else {
931 assert(DataLayout::counter_increment == 1,
932 "flow-free idiom only works with 1");
933 // Increment the register. Set carry flag.
934 addptr(data, DataLayout::counter_increment);
935 // If the increment causes the counter to overflow, pull back by 1.
936 sbbptr(data, (int32_t)0);
937 }
938 }
939
940
941 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
942 Register reg,
943 int constant,
944 bool decrement) {
945 Address data(mdp_in, reg, Address::times_1, constant);
946
947 increment_mdp_data_at(data, decrement);
948 }
949
950 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
951 int flag_byte_constant) {
952 assert(ProfileInterpreter, "must be profiling interpreter");
953 int header_offset = in_bytes(DataLayout::header_offset());
954 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
955 // Set the flag
956 orl(Address(mdp_in, header_offset), header_bits);
957 }
958
959
960
961 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
962 int offset,
963 Register value,
964 Register test_value_out,
965 Label& not_equal_continue) {
966 assert(ProfileInterpreter, "must be profiling interpreter");
967 if (test_value_out == noreg) {
968 cmpptr(value, Address(mdp_in, offset));
969 } else {
970 // Put the test value into a register, so caller can use it:
971 movptr(test_value_out, Address(mdp_in, offset));
972 cmpptr(test_value_out, value);
973 }
974 jcc(Assembler::notEqual, not_equal_continue);
975 }
976
977
978 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
979 int offset_of_disp) {
980 assert(ProfileInterpreter, "must be profiling interpreter");
981 Address disp_address(mdp_in, offset_of_disp);
982 addptr(mdp_in, disp_address);
983 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
984 }
985
986
987 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
988 Register reg,
989 int offset_of_disp) {
990 assert(ProfileInterpreter, "must be profiling interpreter");
991 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
992 addptr(mdp_in, disp_address);
993 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
994 }
995
996
997 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
998 int constant) {
999 assert(ProfileInterpreter, "must be profiling interpreter");
1000 addptr(mdp_in, constant);
1001 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
1002 }
1003
1004
1005 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1006 assert(ProfileInterpreter, "must be profiling interpreter");
1007 push(return_bci); // save/restore across call_VM
1008 call_VM(noreg,
1009 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1010 return_bci);
1011 pop(return_bci);
1012 }
1013
1014
1015 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1016 Register bumped_count) {
1017 if (ProfileInterpreter) {
1018 Label profile_continue;
1019
1020 // If no method data exists, go to profile_continue.
1021 // Otherwise, assign to mdp
1022 test_method_data_pointer(mdp, profile_continue);
1023
1024 // We are taking a branch. Increment the taken count.
1025 // We inline increment_mdp_data_at to return bumped_count in a register
1026 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1027 Address data(mdp, in_bytes(JumpData::taken_offset()));
1028 movptr(bumped_count, data);
1029 assert(DataLayout::counter_increment == 1,
1030 "flow-free idiom only works with 1");
1031 addptr(bumped_count, DataLayout::counter_increment);
1032 sbbptr(bumped_count, 0);
1033 movptr(data, bumped_count); // Store back out
1034
1035 // The method data pointer needs to be updated to reflect the new target.
1036 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1037 bind(profile_continue);
1038 }
1039 }
1040
1041
1042 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1043 if (ProfileInterpreter) {
1044 Label profile_continue;
1045
1046 // If no method data exists, go to profile_continue.
1047 test_method_data_pointer(mdp, profile_continue);
1048
1049 // We are taking a branch. Increment the not taken count.
1050 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1051
1052 // The method data pointer needs to be updated to correspond to
1053 // the next bytecode
1054 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1055 bind(profile_continue);
1056 }
1057 }
1058
1059
1060 void InterpreterMacroAssembler::profile_call(Register mdp) {
1061 if (ProfileInterpreter) {
1062 Label profile_continue;
1063
1064 // If no method data exists, go to profile_continue.
1065 test_method_data_pointer(mdp, profile_continue);
1066
1067 // We are making a call. Increment the count.
1068 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1069
1070 // The method data pointer needs to be updated to reflect the new target.
1071 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1072 bind(profile_continue);
1073 }
1074 }
1075
1076
1077 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1078 if (ProfileInterpreter) {
1079 Label profile_continue;
1080
1081 // If no method data exists, go to profile_continue.
1082 test_method_data_pointer(mdp, profile_continue);
1083
1084 // We are making a call. Increment the count.
1085 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1086
1087 // The method data pointer needs to be updated to reflect the new target.
1088 update_mdp_by_constant(mdp,
1089 in_bytes(VirtualCallData::
1090 virtual_call_data_size()));
1091 bind(profile_continue);
1092 }
1093 }
1094
1095
1096 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1097 Register mdp,
1098 Register reg2,
1099 bool receiver_can_be_null) {
1100 if (ProfileInterpreter) {
1101 Label profile_continue;
1102
1103 // If no method data exists, go to profile_continue.
1104 test_method_data_pointer(mdp, profile_continue);
1105
1106 Label skip_receiver_profile;
1107 if (receiver_can_be_null) {
1108 Label not_null;
1109 testptr(receiver, receiver);
1110 jccb(Assembler::notZero, not_null);
1111 // We are making a call. Increment the count for null receiver.
1112 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1113 jmp(skip_receiver_profile);
1114 bind(not_null);
1115 }
1116
1117 // Record the receiver type.
1118 record_klass_in_profile(receiver, mdp, reg2, true);
1119 bind(skip_receiver_profile);
1120
1121 // The method data pointer needs to be updated to reflect the new target.
1122 update_mdp_by_constant(mdp,
1123 in_bytes(VirtualCallData::
1124 virtual_call_data_size()));
1125 bind(profile_continue);
1126 }
1127 }
1128
1129 // This routine creates a state machine for updating the multi-row
1130 // type profile at a virtual call site (or other type-sensitive bytecode).
1131 // The machine visits each row (of receiver/count) until the receiver type
1132 // is found, or until it runs out of rows. At the same time, it remembers
1133 // the location of the first empty row. (An empty row records null for its
1134 // receiver, and can be allocated for a newly-observed receiver type.)
1135 // Because there are two degrees of freedom in the state, a simple linear
1136 // search will not work; it must be a decision tree. Hence this helper
1137 // function is recursive, to generate the required tree structured code.
1138 // It's the interpreter, so we are trading off code space for speed.
1139 // See below for example code.
1140 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1141 Register receiver, Register mdp,
1142 Register reg2, int start_row,
1143 Label& done, bool is_virtual_call) {
1144 if (TypeProfileWidth == 0) {
1145 if (is_virtual_call) {
1146 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1147 }
1148 return;
1149 }
1150
1151 int last_row = VirtualCallData::row_limit() - 1;
1152 assert(start_row <= last_row, "must be work left to do");
1153 // Test this row for both the receiver and for null.
1154 // Take any of three different outcomes:
1155 // 1. found receiver => increment count and goto done
1156 // 2. found null => keep looking for case 1, maybe allocate this cell
1157 // 3. found something else => keep looking for cases 1 and 2
1158 // Case 3 is handled by a recursive call.
1159 for (int row = start_row; row <= last_row; row++) {
1160 Label next_test;
1161 bool test_for_null_also = (row == start_row);
1162
1163 // See if the receiver is receiver[n].
1164 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1165 test_mdp_data_at(mdp, recvr_offset, receiver,
1166 (test_for_null_also ? reg2 : noreg),
1167 next_test);
1168 // (Reg2 now contains the receiver from the CallData.)
1169
1170 // The receiver is receiver[n]. Increment count[n].
1171 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1172 increment_mdp_data_at(mdp, count_offset);
1173 jmp(done);
1174 bind(next_test);
1175
1176 if (test_for_null_also) {
1177 Label found_null;
1178 // Failed the equality check on receiver[n]... Test for null.
1179 testptr(reg2, reg2);
1180 if (start_row == last_row) {
1181 // The only thing left to do is handle the null case.
1182 if (is_virtual_call) {
1183 jccb(Assembler::zero, found_null);
1184 // Receiver did not match any saved receiver and there is no empty row for it.
1185 // Increment total counter to indicate polymorphic case.
1186 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1187 jmp(done);
1188 bind(found_null);
1189 } else {
1190 jcc(Assembler::notZero, done);
1191 }
1192 break;
1193 }
1194 // Since null is rare, make it be the branch-taken case.
1195 jcc(Assembler::zero, found_null);
1196
1197 // Put all the "Case 3" tests here.
1198 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1199
1200 // Found a null. Keep searching for a matching receiver,
1201 // but remember that this is an empty (unused) slot.
1202 bind(found_null);
1203 }
1204 }
1205
1206 // In the fall-through case, we found no matching receiver, but we
1207 // observed the receiver[start_row] is NULL.
1208
1209 // Fill in the receiver field and increment the count.
1210 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1211 set_mdp_data_at(mdp, recvr_offset, receiver);
1212 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1213 movl(reg2, DataLayout::counter_increment);
1214 set_mdp_data_at(mdp, count_offset, reg2);
1215 if (start_row > 0) {
1216 jmp(done);
1217 }
1218 }
1219
1220 // Example state machine code for three profile rows:
1221 // // main copy of decision tree, rooted at row[1]
1222 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1223 // if (row[0].rec != NULL) {
1224 // // inner copy of decision tree, rooted at row[1]
1225 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1226 // if (row[1].rec != NULL) {
1227 // // degenerate decision tree, rooted at row[2]
1228 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1229 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1230 // row[2].init(rec); goto done;
1231 // } else {
1232 // // remember row[1] is empty
1233 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1234 // row[1].init(rec); goto done;
1235 // }
1236 // } else {
1237 // // remember row[0] is empty
1238 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1239 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1240 // row[0].init(rec); goto done;
1241 // }
1242 // done:
1243
1244 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1245 Register mdp, Register reg2,
1246 bool is_virtual_call) {
1247 assert(ProfileInterpreter, "must be profiling");
1248 Label done;
1249
1250 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1251
1252 bind (done);
1253 }
1254
1255 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1256 Register mdp) {
1257 if (ProfileInterpreter) {
1258 Label profile_continue;
1259 uint row;
1260
1261 // If no method data exists, go to profile_continue.
1262 test_method_data_pointer(mdp, profile_continue);
1263
1264 // Update the total ret count.
1265 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1266
1267 for (row = 0; row < RetData::row_limit(); row++) {
1268 Label next_test;
1269
1270 // See if return_bci is equal to bci[n]:
1271 test_mdp_data_at(mdp,
1272 in_bytes(RetData::bci_offset(row)),
1273 return_bci, noreg,
1274 next_test);
1275
1276 // return_bci is equal to bci[n]. Increment the count.
1277 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1278
1279 // The method data pointer needs to be updated to reflect the new target.
1280 update_mdp_by_offset(mdp,
1281 in_bytes(RetData::bci_displacement_offset(row)));
1282 jmp(profile_continue);
1283 bind(next_test);
1284 }
1285
1286 update_mdp_for_ret(return_bci);
1287
1288 bind(profile_continue);
1289 }
1290 }
1291
1292
1293 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1294 if (ProfileInterpreter) {
1295 Label profile_continue;
1296
1297 // If no method data exists, go to profile_continue.
1298 test_method_data_pointer(mdp, profile_continue);
1299
1300 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1301
1302 // The method data pointer needs to be updated.
1303 int mdp_delta = in_bytes(BitData::bit_data_size());
1304 if (TypeProfileCasts) {
1305 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1306 }
1307 update_mdp_by_constant(mdp, mdp_delta);
1308
1309 bind(profile_continue);
1310 }
1311 }
1312
1313
1314 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1315 if (ProfileInterpreter && TypeProfileCasts) {
1316 Label profile_continue;
1317
1318 // If no method data exists, go to profile_continue.
1319 test_method_data_pointer(mdp, profile_continue);
1320
1321 int count_offset = in_bytes(CounterData::count_offset());
1322 // Back up the address, since we have already bumped the mdp.
1323 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1324
1325 // *Decrement* the counter. We expect to see zero or small negatives.
1326 increment_mdp_data_at(mdp, count_offset, true);
1327
1328 bind (profile_continue);
1329 }
1330 }
1331
1332
1333 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1334 if (ProfileInterpreter) {
1335 Label profile_continue;
1336
1337 // If no method data exists, go to profile_continue.
1338 test_method_data_pointer(mdp, profile_continue);
1339
1340 // The method data pointer needs to be updated.
1341 int mdp_delta = in_bytes(BitData::bit_data_size());
1342 if (TypeProfileCasts) {
1343 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1344
1345 // Record the object type.
1346 record_klass_in_profile(klass, mdp, reg2, false);
1347 }
1348 update_mdp_by_constant(mdp, mdp_delta);
1349
1350 bind(profile_continue);
1351 }
1352 }
1353
1354
1355 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1356 if (ProfileInterpreter) {
1357 Label profile_continue;
1358
1359 // If no method data exists, go to profile_continue.
1360 test_method_data_pointer(mdp, profile_continue);
1361
1362 // Update the default case count
1363 increment_mdp_data_at(mdp,
1364 in_bytes(MultiBranchData::default_count_offset()));
1365
1366 // The method data pointer needs to be updated.
1367 update_mdp_by_offset(mdp,
1368 in_bytes(MultiBranchData::
1369 default_displacement_offset()));
1370
1371 bind(profile_continue);
1372 }
1373 }
1374
1375
1376 void InterpreterMacroAssembler::profile_switch_case(Register index,
1377 Register mdp,
1378 Register reg2) {
1379 if (ProfileInterpreter) {
1380 Label profile_continue;
1381
1382 // If no method data exists, go to profile_continue.
1383 test_method_data_pointer(mdp, profile_continue);
1384
1385 // Build the base (index * per_case_size_in_bytes()) +
1386 // case_array_offset_in_bytes()
1387 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1388 imulptr(index, reg2); // XXX l ?
1389 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1390
1391 // Update the case count
1392 increment_mdp_data_at(mdp,
1393 index,
1394 in_bytes(MultiBranchData::relative_count_offset()));
1395
1396 // The method data pointer needs to be updated.
1397 update_mdp_by_offset(mdp,
1398 index,
1399 in_bytes(MultiBranchData::
1400 relative_displacement_offset()));
1401
1402 bind(profile_continue);
1403 }
1404 }
1405
1406
1407
1408 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1409 if (state == atos) {
1410 MacroAssembler::verify_oop(reg);
1411 }
1412 }
1413
1414 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1415 }
1416 #endif // !CC_INTERP
1417
1418
1419 void InterpreterMacroAssembler::notify_method_entry() {
1420 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1421 // track stack depth. If it is possible to enter interp_only_mode we add
1422 // the code to check if the event should be sent.
1423 if (JvmtiExport::can_post_interpreter_events()) {
1424 Label L;
1425 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset()));
1426 testl(rdx, rdx);
1427 jcc(Assembler::zero, L);
1428 call_VM(noreg, CAST_FROM_FN_PTR(address,
1429 InterpreterRuntime::post_method_entry));
1430 bind(L);
1431 }
1432
1433 {
1434 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1435 get_method(c_rarg1);
1436 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1437 r15_thread, c_rarg1);
1438 }
1439
1440 // RedefineClasses() tracing support for obsolete method entry
1441 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1442 get_method(c_rarg1);
1443 call_VM_leaf(
1444 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1445 r15_thread, c_rarg1);
1446 }
1447 }
1448
1449
1450 void InterpreterMacroAssembler::notify_method_exit(
1451 TosState state, NotifyMethodExitMode mode) {
1452 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1453 // track stack depth. If it is possible to enter interp_only_mode we add
1454 // the code to check if the event should be sent.
1455 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1456 Label L;
1457 // Note: frame::interpreter_frame_result has a dependency on how the
1458 // method result is saved across the call to post_method_exit. If this
1459 // is changed then the interpreter_frame_result implementation will
1460 // need to be updated too.
1461
1462 // For c++ interpreter the result is always stored at a known location in the frame
1463 // template interpreter will leave it on the top of the stack.
1464 NOT_CC_INTERP(push(state);)
1465 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset()));
1466 testl(rdx, rdx);
1467 jcc(Assembler::zero, L);
1468 call_VM(noreg,
1469 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1470 bind(L);
1471 NOT_CC_INTERP(pop(state));
1472 }
1473
1474 {
1475 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1476 NOT_CC_INTERP(push(state));
1477 get_method(c_rarg1);
1478 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1479 r15_thread, c_rarg1);
1480 NOT_CC_INTERP(pop(state));
1481 }
1482 }
1483
1484 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1485 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1486 int increment, int mask,
1487 Register scratch, bool preloaded,
1488 Condition cond, Label* where) {
1489 if (!preloaded) {
1490 movl(scratch, counter_addr);
1491 }
1492 incrementl(scratch, increment);
1493 movl(counter_addr, scratch);
1494 andl(scratch, mask);
1495 jcc(cond, *where);
1496 }