1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "interp_masm_x86_32.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "oops/arrayOop.hpp"
30 #include "oops/markOop.hpp"
31 #include "oops/methodDataOop.hpp"
32 #include "oops/methodOop.hpp"
33 #include "prims/jvmtiExport.hpp"
34 #include "prims/jvmtiRedefineClassesTrace.hpp"
35 #include "prims/jvmtiThreadState.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #ifdef TARGET_OS_FAMILY_linux
40 # include "thread_linux.inline.hpp"
41 #endif
42 #ifdef TARGET_OS_FAMILY_solaris
43 # include "thread_solaris.inline.hpp"
44 #endif
45 #ifdef TARGET_OS_FAMILY_windows
46 # include "thread_windows.inline.hpp"
47 #endif
48 #ifdef TARGET_OS_FAMILY_bsd
49 # include "thread_bsd.inline.hpp"
50 #endif
51
52
53 // Implementation of InterpreterMacroAssembler
54 #ifdef CC_INTERP
55 void InterpreterMacroAssembler::get_method(Register reg) {
56 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
57 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
58 }
59 #endif // CC_INTERP
60
61
62 #ifndef CC_INTERP
63 void InterpreterMacroAssembler::call_VM_leaf_base(
64 address entry_point,
65 int number_of_arguments
66 ) {
67 // interpreter specific
68 //
69 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer
70 // since these are callee saved registers and no blocking/
71 // GC can happen in leaf calls.
72 // Further Note: DO NOT save/restore bcp/locals. If a caller has
73 // already saved them so that it can use rsi/rdi as temporaries
74 // then a save/restore here will DESTROY the copy the caller
75 // saved! There used to be a save_bcp() that only happened in
76 // the ASSERT path (no restore_bcp). Which caused bizarre failures
77 // when jvm built with ASSERTs.
78 #ifdef ASSERT
79 { Label L;
80 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
81 jcc(Assembler::equal, L);
82 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
83 bind(L);
84 }
85 #endif
86 // super call
87 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
88 // interpreter specific
89
90 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals
91 // but since they may not have been saved (and we don't want to
92 // save them here (see note above) the assert is invalid.
93 }
94
95
96 void InterpreterMacroAssembler::call_VM_base(
97 Register oop_result,
98 Register java_thread,
99 Register last_java_sp,
100 address entry_point,
101 int number_of_arguments,
102 bool check_exceptions
103 ) {
104 #ifdef ASSERT
105 { Label L;
106 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
107 jcc(Assembler::equal, L);
108 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
109 bind(L);
110 }
111 #endif /* ASSERT */
112 // interpreter specific
113 //
114 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
115 // really make a difference for these runtime calls, since they are
116 // slow anyway. Btw., bcp must be saved/restored since it may change
117 // due to GC.
118 assert(java_thread == noreg , "not expecting a precomputed java thread");
119 save_bcp();
120 // super call
121 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
122 // interpreter specific
123 restore_bcp();
124 restore_locals();
125 }
126
127
128 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
129 if (JvmtiExport::can_pop_frame()) {
130 Label L;
131 // Initiate popframe handling only if it is not already being processed. If the flag
132 // has the popframe_processing bit set, it means that this code is called *during* popframe
133 // handling - we don't want to reenter.
134 Register pop_cond = java_thread; // Not clear if any other register is available...
135 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
136 testl(pop_cond, JavaThread::popframe_pending_bit);
137 jcc(Assembler::zero, L);
138 testl(pop_cond, JavaThread::popframe_processing_bit);
139 jcc(Assembler::notZero, L);
140 // Call Interpreter::remove_activation_preserving_args_entry() to get the
141 // address of the same-named entrypoint in the generated interpreter code.
142 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
143 jmp(rax);
144 bind(L);
145 get_thread(java_thread);
146 }
147 }
148
149
150 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
151 get_thread(rcx);
152 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
153 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset());
154 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset());
155 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset());
156 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
157 + in_ByteSize(wordSize));
158 switch (state) {
159 case atos: movptr(rax, oop_addr);
160 movptr(oop_addr, NULL_WORD);
161 verify_oop(rax, state); break;
162 case ltos:
163 movl(rdx, val_addr1); // fall through
164 case btos: // fall through
165 case ctos: // fall through
166 case stos: // fall through
167 case itos: movl(rax, val_addr); break;
168 case ftos: fld_s(val_addr); break;
169 case dtos: fld_d(val_addr); break;
170 case vtos: /* nothing to do */ break;
171 default : ShouldNotReachHere();
172 }
173 // Clean up tos value in the thread object
174 movl(tos_addr, (int32_t) ilgl);
175 movptr(val_addr, NULL_WORD);
176 NOT_LP64(movptr(val_addr1, NULL_WORD));
177 }
178
179
180 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
181 if (JvmtiExport::can_force_early_return()) {
182 Label L;
183 Register tmp = java_thread;
184 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
185 testptr(tmp, tmp);
186 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
187
188 // Initiate earlyret handling only if it is not already being processed.
189 // If the flag has the earlyret_processing bit set, it means that this code
190 // is called *during* earlyret handling - we don't want to reenter.
191 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
192 cmpl(tmp, JvmtiThreadState::earlyret_pending);
193 jcc(Assembler::notEqual, L);
194
195 // Call Interpreter::remove_activation_early_entry() to get the address of the
196 // same-named entrypoint in the generated interpreter code.
197 get_thread(java_thread);
198 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
199 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
200 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
201 jmp(rax);
202 bind(L);
203 get_thread(java_thread);
204 }
205 }
206
207
208 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
209 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
210 movl(reg, Address(rsi, bcp_offset));
211 bswapl(reg);
212 shrl(reg, 16);
213 }
214
215
216 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) {
217 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
218 if (index_size == sizeof(u2)) {
219 load_unsigned_short(reg, Address(rsi, bcp_offset));
220 } else if (index_size == sizeof(u4)) {
221 assert(EnableInvokeDynamic, "giant index used only for JSR 292");
222 movl(reg, Address(rsi, bcp_offset));
223 // Check if the secondary index definition is still ~x, otherwise
224 // we have to change the following assembler code to calculate the
225 // plain index.
226 assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line");
227 notl(reg); // convert to plain index
228 } else if (index_size == sizeof(u1)) {
229 assert(EnableInvokeDynamic, "tiny index used only for JSR 292");
230 load_unsigned_byte(reg, Address(rsi, bcp_offset));
231 } else {
232 ShouldNotReachHere();
233 }
234 }
235
236
237 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index,
238 int bcp_offset, size_t index_size) {
239 assert_different_registers(cache, index);
240 get_cache_index_at_bcp(index, bcp_offset, index_size);
241 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
242 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
243 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index
244 }
245
246
247 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
248 Register index,
249 Register bytecode,
250 int byte_no,
251 int bcp_offset,
252 size_t index_size) {
253 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
254 movptr(bytecode, Address(cache, index, Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset()));
255 const int shift_count = (1 + byte_no) * BitsPerByte;
256 shrptr(bytecode, shift_count);
257 andptr(bytecode, 0xFF);
258 }
259
260
261 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
262 int bcp_offset, size_t index_size) {
263 assert(cache != tmp, "must use different register");
264 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
265 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
266 // convert from field index to ConstantPoolCacheEntry index
267 // and from word offset to byte offset
268 shll(tmp, 2 + LogBytesPerWord);
269 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
270 // skip past the header
271 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset()));
272 addptr(cache, tmp); // construct pointer to cache entry
273 }
274
275
276 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
277 // a subtype of super_klass. EAX holds the super_klass. Blows ECX.
278 // Resets EDI to locals. Register sub_klass cannot be any of the above.
279 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
280 assert( Rsub_klass != rax, "rax, holds superklass" );
281 assert( Rsub_klass != rcx, "used as a temp" );
282 assert( Rsub_klass != rdi, "used as a temp, restored from locals" );
283
284 // Profile the not-null value's klass.
285 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
286
287 // Do the check.
288 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
289
290 // Profile the failure of the check.
291 profile_typecheck_failed(rcx); // blows rcx
292 }
293
294 void InterpreterMacroAssembler::f2ieee() {
295 if (IEEEPrecision) {
296 fstp_s(Address(rsp, 0));
297 fld_s(Address(rsp, 0));
298 }
299 }
300
301
302 void InterpreterMacroAssembler::d2ieee() {
303 if (IEEEPrecision) {
304 fstp_d(Address(rsp, 0));
305 fld_d(Address(rsp, 0));
306 }
307 }
308
309 // Java Expression Stack
310
311 void InterpreterMacroAssembler::pop_ptr(Register r) {
312 pop(r);
313 }
314
315 void InterpreterMacroAssembler::pop_i(Register r) {
316 pop(r);
317 }
318
319 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
320 pop(lo);
321 pop(hi);
322 }
323
324 void InterpreterMacroAssembler::pop_f() {
325 fld_s(Address(rsp, 0));
326 addptr(rsp, 1 * wordSize);
327 }
328
329 void InterpreterMacroAssembler::pop_d() {
330 fld_d(Address(rsp, 0));
331 addptr(rsp, 2 * wordSize);
332 }
333
334
335 void InterpreterMacroAssembler::pop(TosState state) {
336 switch (state) {
337 case atos: pop_ptr(rax); break;
338 case btos: // fall through
339 case ctos: // fall through
340 case stos: // fall through
341 case itos: pop_i(rax); break;
342 case ltos: pop_l(rax, rdx); break;
343 case ftos: pop_f(); break;
344 case dtos: pop_d(); break;
345 case vtos: /* nothing to do */ break;
346 default : ShouldNotReachHere();
347 }
348 verify_oop(rax, state);
349 }
350
351 void InterpreterMacroAssembler::push_ptr(Register r) {
352 push(r);
353 }
354
355 void InterpreterMacroAssembler::push_i(Register r) {
356 push(r);
357 }
358
359 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
360 push(hi);
361 push(lo);
362 }
363
364 void InterpreterMacroAssembler::push_f() {
365 // Do not schedule for no AGI! Never write beyond rsp!
366 subptr(rsp, 1 * wordSize);
367 fstp_s(Address(rsp, 0));
368 }
369
370 void InterpreterMacroAssembler::push_d(Register r) {
371 // Do not schedule for no AGI! Never write beyond rsp!
372 subptr(rsp, 2 * wordSize);
373 fstp_d(Address(rsp, 0));
374 }
375
376
377 void InterpreterMacroAssembler::push(TosState state) {
378 verify_oop(rax, state);
379 switch (state) {
380 case atos: push_ptr(rax); break;
381 case btos: // fall through
382 case ctos: // fall through
383 case stos: // fall through
384 case itos: push_i(rax); break;
385 case ltos: push_l(rax, rdx); break;
386 case ftos: push_f(); break;
387 case dtos: push_d(rax); break;
388 case vtos: /* nothing to do */ break;
389 default : ShouldNotReachHere();
390 }
391 }
392
393
394 // Helpers for swap and dup
395 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
396 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
397 }
398
399 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
400 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
401 }
402
403 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
404 // set sender sp
405 lea(rsi, Address(rsp, wordSize));
406 // record last_sp
407 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
408 }
409
410
411 // Jump to from_interpreted entry of a call unless single stepping is possible
412 // in this thread in which case we must call the i2i entry
413 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
414 prepare_to_jump_from_interpreted();
415
416 if (JvmtiExport::can_post_interpreter_events()) {
417 Label run_compiled_code;
418 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
419 // compiled code in threads for which the event is enabled. Check here for
420 // interp_only_mode if these events CAN be enabled.
421 get_thread(temp);
422 // interp_only is an int, on little endian it is sufficient to test the byte only
423 // Is a cmpl faster?
424 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
425 jccb(Assembler::zero, run_compiled_code);
426 jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
427 bind(run_compiled_code);
428 }
429
430 jmp(Address(method, methodOopDesc::from_interpreted_offset()));
431
432 }
433
434
435 // The following two routines provide a hook so that an implementation
436 // can schedule the dispatch in two parts. Intel does not do this.
437 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
438 // Nothing Intel-specific to be done here.
439 }
440
441 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
442 dispatch_next(state, step);
443 }
444
445 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
446 bool verifyoop) {
447 verify_FPU(1, state);
448 if (VerifyActivationFrameSize) {
449 Label L;
450 mov(rcx, rbp);
451 subptr(rcx, rsp);
452 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
453 cmpptr(rcx, min_frame_size);
454 jcc(Assembler::greaterEqual, L);
455 stop("broken stack frame");
456 bind(L);
457 }
458 if (verifyoop) verify_oop(rax, state);
459 Address index(noreg, rbx, Address::times_ptr);
460 ExternalAddress tbl((address)table);
461 ArrayAddress dispatch(tbl, index);
462 jump(dispatch);
463 }
464
465
466 void InterpreterMacroAssembler::dispatch_only(TosState state) {
467 dispatch_base(state, Interpreter::dispatch_table(state));
468 }
469
470
471 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
472 dispatch_base(state, Interpreter::normal_table(state));
473 }
474
475 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
476 dispatch_base(state, Interpreter::normal_table(state), false);
477 }
478
479
480 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
481 // load next bytecode (load before advancing rsi to prevent AGI)
482 load_unsigned_byte(rbx, Address(rsi, step));
483 // advance rsi
484 increment(rsi, step);
485 dispatch_base(state, Interpreter::dispatch_table(state));
486 }
487
488
489 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
490 // load current bytecode
491 load_unsigned_byte(rbx, Address(rsi, 0));
492 dispatch_base(state, table);
493 }
494
495 // remove activation
496 //
497 // Unlock the receiver if this is a synchronized method.
498 // Unlock any Java monitors from syncronized blocks.
499 // Remove the activation from the stack.
500 //
501 // If there are locked Java monitors
502 // If throw_monitor_exception
503 // throws IllegalMonitorStateException
504 // Else if install_monitor_exception
505 // installs IllegalMonitorStateException
506 // Else
507 // no error processing
508 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
509 bool throw_monitor_exception,
510 bool install_monitor_exception,
511 bool notify_jvmdi) {
512 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
513 // check if synchronized method
514 Label unlocked, unlock, no_unlock;
515
516 get_thread(rcx);
517 const Address do_not_unlock_if_synchronized(rcx,
518 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
519
520 movbool(rbx, do_not_unlock_if_synchronized);
521 mov(rdi,rbx);
522 movbool(do_not_unlock_if_synchronized, false); // reset the flag
523
524 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
525 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset()));
526
527 testl(rcx, JVM_ACC_SYNCHRONIZED);
528 jcc(Assembler::zero, unlocked);
529
530 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
531 // is set.
532 mov(rcx,rdi);
533 testbool(rcx);
534 jcc(Assembler::notZero, no_unlock);
535
536 // unlock monitor
537 push(state); // save result
538
539 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
540 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
541 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
542 lea (rdx, monitor); // address of first monitor
543
544 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
545 testptr(rax, rax);
546 jcc (Assembler::notZero, unlock);
547
548 pop(state);
549 if (throw_monitor_exception) {
550 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
551
552 // Entry already unlocked, need to throw exception
553 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
554 should_not_reach_here();
555 } else {
556 // Monitor already unlocked during a stack unroll.
557 // If requested, install an illegal_monitor_state_exception.
558 // Continue with stack unrolling.
559 if (install_monitor_exception) {
560 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
561 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
562 }
563 jmp(unlocked);
564 }
565
566 bind(unlock);
567 unlock_object(rdx);
568 pop(state);
569
570 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
571 bind(unlocked);
572
573 // rax, rdx: Might contain return value
574
575 // Check that all monitors are unlocked
576 {
577 Label loop, exception, entry, restart;
578 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
579 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
580 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
581
582 bind(restart);
583 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry
584 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block
585 jmp(entry);
586
587 // Entry already locked, need to throw exception
588 bind(exception);
589
590 if (throw_monitor_exception) {
591 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
592
593 // Throw exception
594 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
595 should_not_reach_here();
596 } else {
597 // Stack unrolling. Unlock object and install illegal_monitor_exception
598 // Unlock does not block, so don't have to worry about the frame
599
600 push(state);
601 mov(rdx, rcx);
602 unlock_object(rdx);
603 pop(state);
604
605 if (install_monitor_exception) {
606 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
607 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
608 }
609
610 jmp(restart);
611 }
612
613 bind(loop);
614 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used
615 jcc(Assembler::notEqual, exception);
616
617 addptr(rcx, entry_size); // otherwise advance to next entry
618 bind(entry);
619 cmpptr(rcx, rbx); // check if bottom reached
620 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
621 }
622
623 bind(no_unlock);
624
625 // jvmti support
626 if (notify_jvmdi) {
627 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
628 } else {
629 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
630 }
631
632 // remove activation
633 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
634 leave(); // remove frame anchor
635 pop(ret_addr); // get return address
636 mov(rsp, rbx); // set sp to sender sp
637 if (UseSSE) {
638 // float and double are returned in xmm register in SSE-mode
639 if (state == ftos && UseSSE >= 1) {
640 subptr(rsp, wordSize);
641 fstp_s(Address(rsp, 0));
642 movflt(xmm0, Address(rsp, 0));
643 addptr(rsp, wordSize);
644 } else if (state == dtos && UseSSE >= 2) {
645 subptr(rsp, 2*wordSize);
646 fstp_d(Address(rsp, 0));
647 movdbl(xmm0, Address(rsp, 0));
648 addptr(rsp, 2*wordSize);
649 }
650 }
651 }
652
653 #endif /* !CC_INTERP */
654
655
656 // Lock object
657 //
658 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
659 // be initialized with object to lock
660 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
661 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
662
663 if (UseHeavyMonitors) {
664 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
665 } else {
666
667 Label done;
668
669 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
670 const Register obj_reg = rcx; // Will contain the oop
671
672 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
673 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
674 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
675
676 Label slow_case;
677
678 // Load object pointer into obj_reg %rcx
679 movptr(obj_reg, Address(lock_reg, obj_offset));
680
681 if (UseBiasedLocking) {
682 // Note: we use noreg for the temporary register since it's hard
683 // to come up with a free register on all incoming code paths
684 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
685 }
686
687 // Load immediate 1 into swap_reg %rax,
688 movptr(swap_reg, (int32_t)1);
689
690 // Load (object->mark() | 1) into swap_reg %rax,
691 orptr(swap_reg, Address(obj_reg, 0));
692
693 // Save (object->mark() | 1) into BasicLock's displaced header
694 movptr(Address(lock_reg, mark_offset), swap_reg);
695
696 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
697 if (os::is_MP()) {
698 lock();
699 }
700 cmpxchgptr(lock_reg, Address(obj_reg, 0));
701 if (PrintBiasedLockingStatistics) {
702 cond_inc32(Assembler::zero,
703 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
704 }
705 jcc(Assembler::zero, done);
706
707 // Test if the oopMark is an obvious stack pointer, i.e.,
708 // 1) (mark & 3) == 0, and
709 // 2) rsp <= mark < mark + os::pagesize()
710 //
711 // These 3 tests can be done by evaluating the following
712 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
713 // assuming both stack pointer and pagesize have their
714 // least significant 2 bits clear.
715 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
716 subptr(swap_reg, rsp);
717 andptr(swap_reg, 3 - os::vm_page_size());
718
719 // Save the test result, for recursive case, the result is zero
720 movptr(Address(lock_reg, mark_offset), swap_reg);
721
722 if (PrintBiasedLockingStatistics) {
723 cond_inc32(Assembler::zero,
724 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
725 }
726 jcc(Assembler::zero, done);
727
728 bind(slow_case);
729
730 // Call the runtime routine for slow case
731 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
732
733 bind(done);
734 }
735 }
736
737
738 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
739 //
740 // Argument: rdx : Points to BasicObjectLock structure for lock
741 // Throw an IllegalMonitorException if object is not locked by current thread
742 //
743 // Uses: rax, rbx, rcx, rdx
744 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
745 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
746
747 if (UseHeavyMonitors) {
748 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
749 } else {
750 Label done;
751
752 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
753 const Register header_reg = rbx; // Will contain the old oopMark
754 const Register obj_reg = rcx; // Will contain the oop
755
756 save_bcp(); // Save in case of exception
757
758 // Convert from BasicObjectLock structure to object and BasicLock structure
759 // Store the BasicLock address into %rax,
760 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
761
762 // Load oop into obj_reg(%rcx)
763 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
764
765 // Free entry
766 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
767
768 if (UseBiasedLocking) {
769 biased_locking_exit(obj_reg, header_reg, done);
770 }
771
772 // Load the old header from BasicLock structure
773 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
774
775 // Test for recursion
776 testptr(header_reg, header_reg);
777
778 // zero for recursive case
779 jcc(Assembler::zero, done);
780
781 // Atomic swap back the old header
782 if (os::is_MP()) lock();
783 cmpxchgptr(header_reg, Address(obj_reg, 0));
784
785 // zero for recursive case
786 jcc(Assembler::zero, done);
787
788 // Call the runtime routine for slow case.
789 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
790 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
791
792 bind(done);
793
794 restore_bcp();
795 }
796 }
797
798
799 #ifndef CC_INTERP
800
801 // Test ImethodDataPtr. If it is null, continue at the specified label
802 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
803 assert(ProfileInterpreter, "must be profiling interpreter");
804 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
805 testptr(mdp, mdp);
806 jcc(Assembler::zero, zero_continue);
807 }
808
809
810 // Set the method data pointer for the current bcp.
811 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
812 assert(ProfileInterpreter, "must be profiling interpreter");
813 Label set_mdp;
814 push(rax);
815 push(rbx);
816
817 get_method(rbx);
818 // Test MDO to avoid the call if it is NULL.
819 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
820 testptr(rax, rax);
821 jcc(Assembler::zero, set_mdp);
822 // rbx,: method
823 // rsi: bcp
824 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
825 // rax,: mdi
826 // mdo is guaranteed to be non-zero here, we checked for it before the call.
827 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
828 addptr(rbx, in_bytes(methodDataOopDesc::data_offset()));
829 addptr(rax, rbx);
830 bind(set_mdp);
831 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
832 pop(rbx);
833 pop(rax);
834 }
835
836 void InterpreterMacroAssembler::verify_method_data_pointer() {
837 assert(ProfileInterpreter, "must be profiling interpreter");
838 #ifdef ASSERT
839 Label verify_continue;
840 push(rax);
841 push(rbx);
842 push(rcx);
843 push(rdx);
844 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
845 get_method(rbx);
846
847 // If the mdp is valid, it will point to a DataLayout header which is
848 // consistent with the bcp. The converse is highly probable also.
849 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
850 addptr(rdx, Address(rbx, methodOopDesc::const_offset()));
851 lea(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
852 cmpptr(rdx, rsi);
853 jcc(Assembler::equal, verify_continue);
854 // rbx,: method
855 // rsi: bcp
856 // rcx: mdp
857 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
858 bind(verify_continue);
859 pop(rdx);
860 pop(rcx);
861 pop(rbx);
862 pop(rax);
863 #endif // ASSERT
864 }
865
866
867 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
868 // %%% this seems to be used to store counter data which is surely 32bits
869 // however 64bit side stores 64 bits which seems wrong
870 assert(ProfileInterpreter, "must be profiling interpreter");
871 Address data(mdp_in, constant);
872 movptr(data, value);
873 }
874
875
876 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
877 int constant,
878 bool decrement) {
879 // Counter address
880 Address data(mdp_in, constant);
881
882 increment_mdp_data_at(data, decrement);
883 }
884
885
886 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
887 bool decrement) {
888
889 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
890 assert(ProfileInterpreter, "must be profiling interpreter");
891
892 // %%% 64bit treats this as 64 bit which seems unlikely
893 if (decrement) {
894 // Decrement the register. Set condition codes.
895 addl(data, -DataLayout::counter_increment);
896 // If the decrement causes the counter to overflow, stay negative
897 Label L;
898 jcc(Assembler::negative, L);
899 addl(data, DataLayout::counter_increment);
900 bind(L);
901 } else {
902 assert(DataLayout::counter_increment == 1,
903 "flow-free idiom only works with 1");
904 // Increment the register. Set carry flag.
905 addl(data, DataLayout::counter_increment);
906 // If the increment causes the counter to overflow, pull back by 1.
907 sbbl(data, 0);
908 }
909 }
910
911
912 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
913 Register reg,
914 int constant,
915 bool decrement) {
916 Address data(mdp_in, reg, Address::times_1, constant);
917
918 increment_mdp_data_at(data, decrement);
919 }
920
921
922 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
923 assert(ProfileInterpreter, "must be profiling interpreter");
924 int header_offset = in_bytes(DataLayout::header_offset());
925 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
926 // Set the flag
927 orl(Address(mdp_in, header_offset), header_bits);
928 }
929
930
931
932 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
933 int offset,
934 Register value,
935 Register test_value_out,
936 Label& not_equal_continue) {
937 assert(ProfileInterpreter, "must be profiling interpreter");
938 if (test_value_out == noreg) {
939 cmpptr(value, Address(mdp_in, offset));
940 } else {
941 // Put the test value into a register, so caller can use it:
942 movptr(test_value_out, Address(mdp_in, offset));
943 cmpptr(test_value_out, value);
944 }
945 jcc(Assembler::notEqual, not_equal_continue);
946 }
947
948
949 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
950 assert(ProfileInterpreter, "must be profiling interpreter");
951 Address disp_address(mdp_in, offset_of_disp);
952 addptr(mdp_in,disp_address);
953 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
954 }
955
956
957 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
958 assert(ProfileInterpreter, "must be profiling interpreter");
959 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
960 addptr(mdp_in, disp_address);
961 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
962 }
963
964
965 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
966 assert(ProfileInterpreter, "must be profiling interpreter");
967 addptr(mdp_in, constant);
968 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
969 }
970
971
972 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
973 assert(ProfileInterpreter, "must be profiling interpreter");
974 push(return_bci); // save/restore across call_VM
975 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
976 pop(return_bci);
977 }
978
979
980 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
981 if (ProfileInterpreter) {
982 Label profile_continue;
983
984 // If no method data exists, go to profile_continue.
985 // Otherwise, assign to mdp
986 test_method_data_pointer(mdp, profile_continue);
987
988 // We are taking a branch. Increment the taken count.
989 // We inline increment_mdp_data_at to return bumped_count in a register
990 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
991 Address data(mdp, in_bytes(JumpData::taken_offset()));
992
993 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
994 movl(bumped_count,data);
995 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
996 addl(bumped_count, DataLayout::counter_increment);
997 sbbl(bumped_count, 0);
998 movl(data,bumped_count); // Store back out
999
1000 // The method data pointer needs to be updated to reflect the new target.
1001 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1002 bind (profile_continue);
1003 }
1004 }
1005
1006
1007 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1008 if (ProfileInterpreter) {
1009 Label profile_continue;
1010
1011 // If no method data exists, go to profile_continue.
1012 test_method_data_pointer(mdp, profile_continue);
1013
1014 // We are taking a branch. Increment the not taken count.
1015 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1016
1017 // The method data pointer needs to be updated to correspond to the next bytecode
1018 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1019 bind (profile_continue);
1020 }
1021 }
1022
1023
1024 void InterpreterMacroAssembler::profile_call(Register mdp) {
1025 if (ProfileInterpreter) {
1026 Label profile_continue;
1027
1028 // If no method data exists, go to profile_continue.
1029 test_method_data_pointer(mdp, profile_continue);
1030
1031 // We are making a call. Increment the count.
1032 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1033
1034 // The method data pointer needs to be updated to reflect the new target.
1035 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1036 bind (profile_continue);
1037 }
1038 }
1039
1040
1041 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1042 if (ProfileInterpreter) {
1043 Label profile_continue;
1044
1045 // If no method data exists, go to profile_continue.
1046 test_method_data_pointer(mdp, profile_continue);
1047
1048 // We are making a call. Increment the count.
1049 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1050
1051 // The method data pointer needs to be updated to reflect the new target.
1052 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1053 bind (profile_continue);
1054 }
1055 }
1056
1057
1058 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp,
1059 Register reg2,
1060 bool receiver_can_be_null) {
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 Label skip_receiver_profile;
1068 if (receiver_can_be_null) {
1069 Label not_null;
1070 testptr(receiver, receiver);
1071 jccb(Assembler::notZero, not_null);
1072 // We are making a call. Increment the count for null receiver.
1073 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1074 jmp(skip_receiver_profile);
1075 bind(not_null);
1076 }
1077
1078 // Record the receiver type.
1079 record_klass_in_profile(receiver, mdp, reg2, true);
1080 bind(skip_receiver_profile);
1081
1082 // The method data pointer needs to be updated to reflect the new target.
1083 update_mdp_by_constant(mdp,
1084 in_bytes(VirtualCallData::
1085 virtual_call_data_size()));
1086 bind(profile_continue);
1087 }
1088 }
1089
1090
1091 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1092 Register receiver, Register mdp,
1093 Register reg2, int start_row,
1094 Label& done, bool is_virtual_call) {
1095 if (TypeProfileWidth == 0) {
1096 if (is_virtual_call) {
1097 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1098 }
1099 return;
1100 }
1101
1102 int last_row = VirtualCallData::row_limit() - 1;
1103 assert(start_row <= last_row, "must be work left to do");
1104 // Test this row for both the receiver and for null.
1105 // Take any of three different outcomes:
1106 // 1. found receiver => increment count and goto done
1107 // 2. found null => keep looking for case 1, maybe allocate this cell
1108 // 3. found something else => keep looking for cases 1 and 2
1109 // Case 3 is handled by a recursive call.
1110 for (int row = start_row; row <= last_row; row++) {
1111 Label next_test;
1112 bool test_for_null_also = (row == start_row);
1113
1114 // See if the receiver is receiver[n].
1115 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1116 test_mdp_data_at(mdp, recvr_offset, receiver,
1117 (test_for_null_also ? reg2 : noreg),
1118 next_test);
1119 // (Reg2 now contains the receiver from the CallData.)
1120
1121 // The receiver is receiver[n]. Increment count[n].
1122 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1123 increment_mdp_data_at(mdp, count_offset);
1124 jmp(done);
1125 bind(next_test);
1126
1127 if (row == start_row) {
1128 Label found_null;
1129 // Failed the equality check on receiver[n]... Test for null.
1130 testptr(reg2, reg2);
1131 if (start_row == last_row) {
1132 // The only thing left to do is handle the null case.
1133 if (is_virtual_call) {
1134 jccb(Assembler::zero, found_null);
1135 // Receiver did not match any saved receiver and there is no empty row for it.
1136 // Increment total counter to indicate polymorphic case.
1137 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1138 jmp(done);
1139 bind(found_null);
1140 } else {
1141 jcc(Assembler::notZero, done);
1142 }
1143 break;
1144 }
1145 // Since null is rare, make it be the branch-taken case.
1146 jcc(Assembler::zero, found_null);
1147
1148 // Put all the "Case 3" tests here.
1149 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1150
1151 // Found a null. Keep searching for a matching receiver,
1152 // but remember that this is an empty (unused) slot.
1153 bind(found_null);
1154 }
1155 }
1156
1157 // In the fall-through case, we found no matching receiver, but we
1158 // observed the receiver[start_row] is NULL.
1159
1160 // Fill in the receiver field and increment the count.
1161 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1162 set_mdp_data_at(mdp, recvr_offset, receiver);
1163 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1164 movptr(reg2, (intptr_t)DataLayout::counter_increment);
1165 set_mdp_data_at(mdp, count_offset, reg2);
1166 if (start_row > 0) {
1167 jmp(done);
1168 }
1169 }
1170
1171 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1172 Register mdp, Register reg2,
1173 bool is_virtual_call) {
1174 assert(ProfileInterpreter, "must be profiling");
1175 Label done;
1176
1177 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1178
1179 bind (done);
1180 }
1181
1182 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
1183 if (ProfileInterpreter) {
1184 Label profile_continue;
1185 uint row;
1186
1187 // If no method data exists, go to profile_continue.
1188 test_method_data_pointer(mdp, profile_continue);
1189
1190 // Update the total ret count.
1191 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1192
1193 for (row = 0; row < RetData::row_limit(); row++) {
1194 Label next_test;
1195
1196 // See if return_bci is equal to bci[n]:
1197 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
1198 noreg, next_test);
1199
1200 // return_bci is equal to bci[n]. Increment the count.
1201 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1202
1203 // The method data pointer needs to be updated to reflect the new target.
1204 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
1205 jmp(profile_continue);
1206 bind(next_test);
1207 }
1208
1209 update_mdp_for_ret(return_bci);
1210
1211 bind (profile_continue);
1212 }
1213 }
1214
1215
1216 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1217 if (ProfileInterpreter) {
1218 Label profile_continue;
1219
1220 // If no method data exists, go to profile_continue.
1221 test_method_data_pointer(mdp, profile_continue);
1222
1223 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1224
1225 // The method data pointer needs to be updated.
1226 int mdp_delta = in_bytes(BitData::bit_data_size());
1227 if (TypeProfileCasts) {
1228 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1229 }
1230 update_mdp_by_constant(mdp, mdp_delta);
1231
1232 bind (profile_continue);
1233 }
1234 }
1235
1236
1237 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1238 if (ProfileInterpreter && TypeProfileCasts) {
1239 Label profile_continue;
1240
1241 // If no method data exists, go to profile_continue.
1242 test_method_data_pointer(mdp, profile_continue);
1243
1244 int count_offset = in_bytes(CounterData::count_offset());
1245 // Back up the address, since we have already bumped the mdp.
1246 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1247
1248 // *Decrement* the counter. We expect to see zero or small negatives.
1249 increment_mdp_data_at(mdp, count_offset, true);
1250
1251 bind (profile_continue);
1252 }
1253 }
1254
1255
1256 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
1257 {
1258 if (ProfileInterpreter) {
1259 Label profile_continue;
1260
1261 // If no method data exists, go to profile_continue.
1262 test_method_data_pointer(mdp, profile_continue);
1263
1264 // The method data pointer needs to be updated.
1265 int mdp_delta = in_bytes(BitData::bit_data_size());
1266 if (TypeProfileCasts) {
1267 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1268
1269 // Record the object type.
1270 record_klass_in_profile(klass, mdp, reg2, false);
1271 assert(reg2 == rdi, "we know how to fix this blown reg");
1272 restore_locals(); // Restore EDI
1273 }
1274 update_mdp_by_constant(mdp, mdp_delta);
1275
1276 bind(profile_continue);
1277 }
1278 }
1279
1280
1281 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1282 if (ProfileInterpreter) {
1283 Label profile_continue;
1284
1285 // If no method data exists, go to profile_continue.
1286 test_method_data_pointer(mdp, profile_continue);
1287
1288 // Update the default case count
1289 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1290
1291 // The method data pointer needs to be updated.
1292 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
1293
1294 bind (profile_continue);
1295 }
1296 }
1297
1298
1299 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
1300 if (ProfileInterpreter) {
1301 Label profile_continue;
1302
1303 // If no method data exists, go to profile_continue.
1304 test_method_data_pointer(mdp, profile_continue);
1305
1306 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1307 movptr(reg2, (intptr_t)in_bytes(MultiBranchData::per_case_size()));
1308 // index is positive and so should have correct value if this code were
1309 // used on 64bits
1310 imulptr(index, reg2);
1311 addptr(index, in_bytes(MultiBranchData::case_array_offset()));
1312
1313 // Update the case count
1314 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1315
1316 // The method data pointer needs to be updated.
1317 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
1318
1319 bind (profile_continue);
1320 }
1321 }
1322
1323 #endif // !CC_INTERP
1324
1325
1326
1327 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1328 if (state == atos) MacroAssembler::verify_oop(reg);
1329 }
1330
1331
1332 #ifndef CC_INTERP
1333 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1334 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1335 }
1336
1337 #endif /* CC_INTERP */
1338
1339
1340 void InterpreterMacroAssembler::notify_method_entry() {
1341 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1342 // track stack depth. If it is possible to enter interp_only_mode we add
1343 // the code to check if the event should be sent.
1344 if (JvmtiExport::can_post_interpreter_events()) {
1345 Label L;
1346 get_thread(rcx);
1347 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1348 testl(rcx,rcx);
1349 jcc(Assembler::zero, L);
1350 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
1351 bind(L);
1352 }
1353
1354 {
1355 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1356 get_thread(rcx);
1357 get_method(rbx);
1358 call_VM_leaf(
1359 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
1360 }
1361
1362 // RedefineClasses() tracing support for obsolete method entry
1363 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1364 get_thread(rcx);
1365 get_method(rbx);
1366 call_VM_leaf(
1367 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1368 rcx, rbx);
1369 }
1370 }
1371
1372
1373 void InterpreterMacroAssembler::notify_method_exit(
1374 TosState state, NotifyMethodExitMode mode) {
1375 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1376 // track stack depth. If it is possible to enter interp_only_mode we add
1377 // the code to check if the event should be sent.
1378 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1379 Label L;
1380 // Note: frame::interpreter_frame_result has a dependency on how the
1381 // method result is saved across the call to post_method_exit. If this
1382 // is changed then the interpreter_frame_result implementation will
1383 // need to be updated too.
1384
1385 // For c++ interpreter the result is always stored at a known location in the frame
1386 // template interpreter will leave it on the top of the stack.
1387 NOT_CC_INTERP(push(state);)
1388 get_thread(rcx);
1389 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1390 testl(rcx,rcx);
1391 jcc(Assembler::zero, L);
1392 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1393 bind(L);
1394 NOT_CC_INTERP(pop(state);)
1395 }
1396
1397 {
1398 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1399 NOT_CC_INTERP(push(state));
1400 get_thread(rbx);
1401 get_method(rcx);
1402 call_VM_leaf(
1403 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1404 rbx, rcx);
1405 NOT_CC_INTERP(pop(state));
1406 }
1407 }
1408
1409 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1410 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1411 int increment, int mask,
1412 Register scratch, bool preloaded,
1413 Condition cond, Label* where) {
1414 if (!preloaded) {
1415 movl(scratch, counter_addr);
1416 }
1417 incrementl(scratch, increment);
1418 movl(counter_addr, scratch);
1419 andl(scratch, mask);
1420 jcc(cond, *where);
1421 }