1 /*
2 * Copyright (c) 1997, 2014, 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.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "oops/arrayOop.hpp"
30 #include "oops/markOop.hpp"
31 #include "oops/methodData.hpp"
32 #include "oops/method.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 #include "runtime/thread.inline.hpp"
40
41
42 // Implementation of InterpreterMacroAssembler
43 #ifdef CC_INTERP
44 void InterpreterMacroAssembler::get_method(Register reg) {
45 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
46 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
47 }
48 #endif // CC_INTERP
49
50
51 #ifndef CC_INTERP
52 void InterpreterMacroAssembler::call_VM_leaf_base(
53 address entry_point,
54 int number_of_arguments
55 ) {
56 // interpreter specific
57 //
58 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer
59 // since these are callee saved registers and no blocking/
60 // GC can happen in leaf calls.
61 // Further Note: DO NOT save/restore bcp/locals. If a caller has
62 // already saved them so that it can use rsi/rdi as temporaries
63 // then a save/restore here will DESTROY the copy the caller
64 // saved! There used to be a save_bcp() that only happened in
65 // the ASSERT path (no restore_bcp). Which caused bizarre failures
66 // when jvm built with ASSERTs.
67 #ifdef ASSERT
68 { Label L;
69 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
70 jcc(Assembler::equal, L);
71 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
72 bind(L);
73 }
74 #endif
75 // super call
76 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
77 // interpreter specific
78
79 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals
80 // but since they may not have been saved (and we don't want to
81 // save them here (see note above) the assert is invalid.
82 }
83
84
85 void InterpreterMacroAssembler::call_VM_base(
86 Register oop_result,
87 Register java_thread,
88 Register last_java_sp,
89 address entry_point,
90 int number_of_arguments,
91 bool check_exceptions
92 ) {
93 #ifdef ASSERT
94 { Label L;
95 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
96 jcc(Assembler::equal, L);
97 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
98 bind(L);
99 }
100 #endif /* ASSERT */
101 // interpreter specific
102 //
103 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
104 // really make a difference for these runtime calls, since they are
105 // slow anyway. Btw., bcp must be saved/restored since it may change
106 // due to GC.
107 assert(java_thread == noreg , "not expecting a precomputed java thread");
108 save_bcp();
109 // super call
110 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
111 // interpreter specific
112 restore_bcp();
113 restore_locals();
114 }
115
116
117 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
118 if (JvmtiExport::can_pop_frame()) {
119 Label L;
120 // Initiate popframe handling only if it is not already being processed. If the flag
121 // has the popframe_processing bit set, it means that this code is called *during* popframe
122 // handling - we don't want to reenter.
123 Register pop_cond = java_thread; // Not clear if any other register is available...
124 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
125 testl(pop_cond, JavaThread::popframe_pending_bit);
126 jcc(Assembler::zero, L);
127 testl(pop_cond, JavaThread::popframe_processing_bit);
128 jcc(Assembler::notZero, L);
129 // Call Interpreter::remove_activation_preserving_args_entry() to get the
130 // address of the same-named entrypoint in the generated interpreter code.
131 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
132 jmp(rax);
133 bind(L);
134 get_thread(java_thread);
135 }
136 }
137
138
139 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
140 get_thread(rcx);
141 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
142 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset());
143 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset());
144 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset());
145 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
146 + in_ByteSize(wordSize));
147 switch (state) {
148 case atos: movptr(rax, oop_addr);
149 movptr(oop_addr, NULL_WORD);
150 verify_oop(rax, state); break;
151 case ltos:
152 movl(rdx, val_addr1); // fall through
153 case btos: // fall through
154 case ctos: // fall through
155 case stos: // fall through
156 case itos: movl(rax, val_addr); break;
157 case ftos: fld_s(val_addr); break;
158 case dtos: fld_d(val_addr); break;
159 case vtos: /* nothing to do */ break;
160 default : ShouldNotReachHere();
161 }
162 // Clean up tos value in the thread object
163 movl(tos_addr, (int32_t) ilgl);
164 movptr(val_addr, NULL_WORD);
165 NOT_LP64(movptr(val_addr1, NULL_WORD));
166 }
167
168
169 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
170 if (JvmtiExport::can_force_early_return()) {
171 Label L;
172 Register tmp = java_thread;
173 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
174 testptr(tmp, tmp);
175 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
176
177 // Initiate earlyret handling only if it is not already being processed.
178 // If the flag has the earlyret_processing bit set, it means that this code
179 // is called *during* earlyret handling - we don't want to reenter.
180 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
181 cmpl(tmp, JvmtiThreadState::earlyret_pending);
182 jcc(Assembler::notEqual, L);
183
184 // Call Interpreter::remove_activation_early_entry() to get the address of the
185 // same-named entrypoint in the generated interpreter code.
186 get_thread(java_thread);
187 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
188 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
189 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
190 jmp(rax);
191 bind(L);
192 get_thread(java_thread);
193 }
194 }
195
196
197 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
198 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
199 load_unsigned_short(reg, Address(rsi, bcp_offset));
200 bswapl(reg);
201 shrl(reg, 16);
202 }
203
204
205 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) {
206 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
207 if (index_size == sizeof(u2)) {
208 load_unsigned_short(reg, Address(rsi, bcp_offset));
209 } else if (index_size == sizeof(u4)) {
210 movl(reg, Address(rsi, bcp_offset));
211 // Check if the secondary index definition is still ~x, otherwise
212 // we have to change the following assembler code to calculate the
213 // plain index.
214 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
215 notl(reg); // convert to plain index
216 } else if (index_size == sizeof(u1)) {
217 load_unsigned_byte(reg, Address(rsi, bcp_offset));
218 } else {
219 ShouldNotReachHere();
220 }
221 }
222
223
224 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index,
225 int bcp_offset, size_t index_size) {
226 assert_different_registers(cache, index);
227 get_cache_index_at_bcp(index, bcp_offset, index_size);
228 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
229 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
230 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
231 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index
232 }
233
234
235 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
236 Register index,
237 Register bytecode,
238 int byte_no,
239 int bcp_offset,
240 size_t index_size) {
241 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
242 movptr(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
243 const int shift_count = (1 + byte_no) * BitsPerByte;
244 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
245 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
246 "correct shift count");
247 shrptr(bytecode, shift_count);
248 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
249 andptr(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
250 }
251
252
253 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
254 int bcp_offset, size_t index_size) {
255 assert(cache != tmp, "must use different register");
256 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
257 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
258 // convert from field index to ConstantPoolCacheEntry index
259 // and from word offset to byte offset
260 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
261 shll(tmp, 2 + LogBytesPerWord);
262 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
263 // skip past the header
264 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
265 addptr(cache, tmp); // construct pointer to cache entry
266 }
267
268 // Load object from cpool->resolved_references(index)
269 void InterpreterMacroAssembler::load_resolved_reference_at_index(
270 Register result, Register index) {
271 assert_different_registers(result, index);
272 // convert from field index to resolved_references() index and from
273 // word index to byte offset. Since this is a java object, it can be compressed
274 Register tmp = index; // reuse
275 shll(tmp, LogBytesPerHeapOop);
276
277 get_constant_pool(result);
278 // load pointer for resolved_references[] objArray
279 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes()));
280 // JNIHandles::resolve(obj);
281 movptr(result, Address(result, 0));
282 // Add in the index
283 addptr(result, tmp);
284 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
285 }
286
287 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
288 // a subtype of super_klass. EAX holds the super_klass. Blows ECX.
289 // Resets EDI to locals. Register sub_klass cannot be any of the above.
290 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
291 assert( Rsub_klass != rax, "rax, holds superklass" );
292 assert( Rsub_klass != rcx, "used as a temp" );
293 assert( Rsub_klass != rdi, "used as a temp, restored from locals" );
294
295 // Profile the not-null value's klass.
296 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
297
298 // Do the check.
299 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
300
301 // Profile the failure of the check.
302 profile_typecheck_failed(rcx); // blows rcx
303 }
304
305 void InterpreterMacroAssembler::f2ieee() {
306 if (IEEEPrecision) {
307 fstp_s(Address(rsp, 0));
308 fld_s(Address(rsp, 0));
309 }
310 }
311
312
313 void InterpreterMacroAssembler::d2ieee() {
314 if (IEEEPrecision) {
315 fstp_d(Address(rsp, 0));
316 fld_d(Address(rsp, 0));
317 }
318 }
319
320 // Java Expression Stack
321
322 void InterpreterMacroAssembler::pop_ptr(Register r) {
323 pop(r);
324 }
325
326 void InterpreterMacroAssembler::pop_i(Register r) {
327 pop(r);
328 }
329
330 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
331 pop(lo);
332 pop(hi);
333 }
334
335 void InterpreterMacroAssembler::pop_f() {
336 fld_s(Address(rsp, 0));
337 addptr(rsp, 1 * wordSize);
338 }
339
340 void InterpreterMacroAssembler::pop_d() {
341 fld_d(Address(rsp, 0));
342 addptr(rsp, 2 * wordSize);
343 }
344
345
346 void InterpreterMacroAssembler::pop(TosState state) {
347 switch (state) {
348 case atos: pop_ptr(rax); break;
349 case btos: // fall through
350 case ctos: // fall through
351 case stos: // fall through
352 case itos: pop_i(rax); break;
353 case ltos: pop_l(rax, rdx); break;
354 case ftos: pop_f(); break;
355 case dtos: pop_d(); break;
356 case vtos: /* nothing to do */ break;
357 default : ShouldNotReachHere();
358 }
359 verify_oop(rax, state);
360 }
361
362 void InterpreterMacroAssembler::push_ptr(Register r) {
363 push(r);
364 }
365
366 void InterpreterMacroAssembler::push_i(Register r) {
367 push(r);
368 }
369
370 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
371 push(hi);
372 push(lo);
373 }
374
375 void InterpreterMacroAssembler::push_f() {
376 // Do not schedule for no AGI! Never write beyond rsp!
377 subptr(rsp, 1 * wordSize);
378 fstp_s(Address(rsp, 0));
379 }
380
381 void InterpreterMacroAssembler::push_d(Register r) {
382 // Do not schedule for no AGI! Never write beyond rsp!
383 subptr(rsp, 2 * wordSize);
384 fstp_d(Address(rsp, 0));
385 }
386
387
388 void InterpreterMacroAssembler::push(TosState state) {
389 verify_oop(rax, state);
390 switch (state) {
391 case atos: push_ptr(rax); break;
392 case btos: // fall through
393 case ctos: // fall through
394 case stos: // fall through
395 case itos: push_i(rax); break;
396 case ltos: push_l(rax, rdx); break;
397 case ftos: push_f(); break;
398 case dtos: push_d(rax); break;
399 case vtos: /* nothing to do */ break;
400 default : ShouldNotReachHere();
401 }
402 }
403
404
405 // Helpers for swap and dup
406 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
407 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
408 }
409
410 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
411 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
412 }
413
414 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
415 // set sender sp
416 lea(rsi, Address(rsp, wordSize));
417 // record last_sp
418 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
419 }
420
421
422 // Jump to from_interpreted entry of a call unless single stepping is possible
423 // in this thread in which case we must call the i2i entry
424 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
425 prepare_to_jump_from_interpreted();
426
427 if (JvmtiExport::can_post_interpreter_events()) {
428 Label run_compiled_code;
429 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
430 // compiled code in threads for which the event is enabled. Check here for
431 // interp_only_mode if these events CAN be enabled.
432 get_thread(temp);
433 // interp_only is an int, on little endian it is sufficient to test the byte only
434 // Is a cmpl faster?
435 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
436 jccb(Assembler::zero, run_compiled_code);
437 jmp(Address(method, Method::interpreter_entry_offset()));
438 bind(run_compiled_code);
439 }
440
441 jmp(Address(method, Method::from_interpreted_offset()));
442
443 }
444
445
446 // The following two routines provide a hook so that an implementation
447 // can schedule the dispatch in two parts. Intel does not do this.
448 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
449 // Nothing Intel-specific to be done here.
450 }
451
452 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
453 dispatch_next(state, step);
454 }
455
456 void InterpreterMacroAssembler::dispatch_base(TosState state, 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 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
464 cmpptr(rcx, min_frame_size);
465 jcc(Assembler::greaterEqual, L);
466 stop("broken stack frame");
467 bind(L);
468 }
469 if (verifyoop) verify_oop(rax, state);
470 Address index(noreg, rbx, Address::times_ptr);
471 ExternalAddress tbl((address)table);
472 ArrayAddress dispatch(tbl, index);
473 jump(dispatch);
474 }
475
476
477 void InterpreterMacroAssembler::dispatch_only(TosState state) {
478 dispatch_base(state, Interpreter::dispatch_table(state));
479 }
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 rsi to prevent AGI)
493 load_unsigned_byte(rbx, Address(rsi, step));
494 // advance rsi
495 increment(rsi, step);
496 dispatch_base(state, Interpreter::dispatch_table(state));
497 }
498
499
500 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
501 // load current bytecode
502 load_unsigned_byte(rbx, Address(rsi, 0));
503 dispatch_base(state, table);
504 }
505
506 // remove activation
507 //
508 // Unlock the receiver if this is a synchronized method.
509 // Unlock any Java monitors from syncronized blocks.
510 // Remove the activation from the stack.
511 //
512 // If there are locked Java monitors
513 // If throw_monitor_exception
514 // throws IllegalMonitorStateException
515 // Else if install_monitor_exception
516 // installs IllegalMonitorStateException
517 // Else
518 // no error processing
519 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
520 bool throw_monitor_exception,
521 bool install_monitor_exception,
522 bool notify_jvmdi) {
523 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
524 // check if synchronized method
525 Label unlocked, unlock, no_unlock;
526
527 get_thread(rcx);
528 const Address do_not_unlock_if_synchronized(rcx,
529 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
530
531 movbool(rbx, do_not_unlock_if_synchronized);
532 mov(rdi,rbx);
533 movbool(do_not_unlock_if_synchronized, false); // reset the flag
534
535 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
536 movl(rcx, Address(rbx, Method::access_flags_offset()));
537
538 testl(rcx, JVM_ACC_SYNCHRONIZED);
539 jcc(Assembler::zero, unlocked);
540
541 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
542 // is set.
543 mov(rcx,rdi);
544 testbool(rcx);
545 jcc(Assembler::notZero, no_unlock);
546
547 // unlock monitor
548 push(state); // save result
549
550 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
551 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
552 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
553 lea (rdx, monitor); // address of first monitor
554
555 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
556 testptr(rax, rax);
557 jcc (Assembler::notZero, unlock);
558
559 pop(state);
560 if (throw_monitor_exception) {
561 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
562
563 // Entry already unlocked, need to throw exception
564 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
565 should_not_reach_here();
566 } else {
567 // Monitor already unlocked during a stack unroll.
568 // If requested, install an illegal_monitor_state_exception.
569 // Continue with stack unrolling.
570 if (install_monitor_exception) {
571 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
572 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
573 }
574 jmp(unlocked);
575 }
576
577 bind(unlock);
578 unlock_object(rdx);
579 pop(state);
580
581 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
582 bind(unlocked);
583
584 // rax, rdx: Might contain return value
585
586 // Check that all monitors are unlocked
587 {
588 Label loop, exception, entry, restart;
589 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
590 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
591 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
592
593 bind(restart);
594 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry
595 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block
596 jmp(entry);
597
598 // Entry already locked, need to throw exception
599 bind(exception);
600
601 if (throw_monitor_exception) {
602 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
603
604 // Throw exception
605 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
606 should_not_reach_here();
607 } else {
608 // Stack unrolling. Unlock object and install illegal_monitor_exception
609 // Unlock does not block, so don't have to worry about the frame
610
611 push(state);
612 mov(rdx, rcx);
613 unlock_object(rdx);
614 pop(state);
615
616 if (install_monitor_exception) {
617 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
618 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
619 }
620
621 jmp(restart);
622 }
623
624 bind(loop);
625 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used
626 jcc(Assembler::notEqual, exception);
627
628 addptr(rcx, entry_size); // otherwise advance to next entry
629 bind(entry);
630 cmpptr(rcx, rbx); // check if bottom reached
631 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
632 }
633
634 bind(no_unlock);
635
636 // jvmti support
637 if (notify_jvmdi) {
638 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
639 } else {
640 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
641 }
642
643 // remove activation
644 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
645 leave(); // remove frame anchor
646 pop(ret_addr); // get return address
647 mov(rsp, rbx); // set sp to sender sp
648 if (UseSSE) {
649 // float and double are returned in xmm register in SSE-mode
650 if (state == ftos && UseSSE >= 1) {
651 subptr(rsp, wordSize);
652 fstp_s(Address(rsp, 0));
653 movflt(xmm0, Address(rsp, 0));
654 addptr(rsp, wordSize);
655 } else if (state == dtos && UseSSE >= 2) {
656 subptr(rsp, 2*wordSize);
657 fstp_d(Address(rsp, 0));
658 movdbl(xmm0, Address(rsp, 0));
659 addptr(rsp, 2*wordSize);
660 }
661 }
662 }
663
664 #endif /* !CC_INTERP */
665
666 void InterpreterMacroAssembler::get_method_counters(Register method,
667 Register mcs, Label& skip) {
668 Label has_counters;
669 movptr(mcs, Address(method, Method::method_counters_offset()));
670 testptr(mcs, mcs);
671 jcc(Assembler::notZero, has_counters);
672 call_VM(noreg, CAST_FROM_FN_PTR(address,
673 InterpreterRuntime::build_method_counters), method);
674 movptr(mcs, Address(method,Method::method_counters_offset()));
675 testptr(mcs, mcs);
676 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
677 bind(has_counters);
678 }
679
680
681 // Lock object
682 //
683 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
684 // be initialized with object to lock
685 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
686 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
687
688 if (UseHeavyMonitors) {
689 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
690 } else {
691
692 Label done;
693
694 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
695 const Register obj_reg = rcx; // Will contain the oop
696
697 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
698 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
699 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
700
701 Label slow_case;
702
703 // Load object pointer into obj_reg %rcx
704 movptr(obj_reg, Address(lock_reg, obj_offset));
705
706 if (UseBiasedLocking) {
707 // Note: we use noreg for the temporary register since it's hard
708 // to come up with a free register on all incoming code paths
709 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
710 }
711
712 // Load immediate 1 into swap_reg %rax,
713 movptr(swap_reg, (int32_t)1);
714
715 // Load (object->mark() | 1) into swap_reg %rax,
716 orptr(swap_reg, Address(obj_reg, 0));
717
718 // Save (object->mark() | 1) into BasicLock's displaced header
719 movptr(Address(lock_reg, mark_offset), swap_reg);
720
721 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
722 if (os::is_MP()) {
723 lock();
724 }
725 cmpxchgptr(lock_reg, Address(obj_reg, 0));
726 if (PrintBiasedLockingStatistics) {
727 cond_inc32(Assembler::zero,
728 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
729 }
730 jcc(Assembler::zero, done);
731
732 // Test if the oopMark is an obvious stack pointer, i.e.,
733 // 1) (mark & 3) == 0, and
734 // 2) rsp <= mark < mark + os::pagesize()
735 //
736 // These 3 tests can be done by evaluating the following
737 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
738 // assuming both stack pointer and pagesize have their
739 // least significant 2 bits clear.
740 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
741 subptr(swap_reg, rsp);
742 andptr(swap_reg, 3 - os::vm_page_size());
743
744 // Save the test result, for recursive case, the result is zero
745 movptr(Address(lock_reg, mark_offset), swap_reg);
746
747 if (PrintBiasedLockingStatistics) {
748 cond_inc32(Assembler::zero,
749 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
750 }
751 jcc(Assembler::zero, done);
752
753 bind(slow_case);
754
755 // Call the runtime routine for slow case
756 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
757
758 bind(done);
759 }
760 }
761
762
763 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
764 //
765 // Argument: rdx : Points to BasicObjectLock structure for lock
766 // Throw an IllegalMonitorException if object is not locked by current thread
767 //
768 // Uses: rax, rbx, rcx, rdx
769 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
770 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
771
772 if (UseHeavyMonitors) {
773 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
774 } else {
775 Label done;
776
777 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
778 const Register header_reg = rbx; // Will contain the old oopMark
779 const Register obj_reg = rcx; // Will contain the oop
780
781 save_bcp(); // Save in case of exception
782
783 // Convert from BasicObjectLock structure to object and BasicLock structure
784 // Store the BasicLock address into %rax,
785 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
786
787 // Load oop into obj_reg(%rcx)
788 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
789
790 // Free entry
791 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
792
793 if (UseBiasedLocking) {
794 biased_locking_exit(obj_reg, header_reg, done);
795 }
796
797 // Load the old header from BasicLock structure
798 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
799
800 // Test for recursion
801 testptr(header_reg, header_reg);
802
803 // zero for recursive case
804 jcc(Assembler::zero, done);
805
806 // Atomic swap back the old header
807 if (os::is_MP()) lock();
808 cmpxchgptr(header_reg, Address(obj_reg, 0));
809
810 // zero for recursive case
811 jcc(Assembler::zero, done);
812
813 // Call the runtime routine for slow case.
814 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
815 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
816
817 bind(done);
818
819 restore_bcp();
820 }
821 }
822
823
824 #ifndef CC_INTERP
825
826 // Test ImethodDataPtr. If it is null, continue at the specified label
827 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
828 assert(ProfileInterpreter, "must be profiling interpreter");
829 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_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 set_mdp;
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(Method::method_data_offset())));
845 testptr(rax, rax);
846 jcc(Assembler::zero, set_mdp);
847 // rbx,: method
848 // rsi: bcp
849 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
850 // rax,: mdi
851 // mdo is guaranteed to be non-zero here, we checked for it before the call.
852 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
853 addptr(rbx, in_bytes(MethodData::data_offset()));
854 addptr(rax, rbx);
855 bind(set_mdp);
856 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
857 pop(rbx);
858 pop(rax);
859 }
860
861 void InterpreterMacroAssembler::verify_method_data_pointer() {
862 assert(ProfileInterpreter, "must be profiling interpreter");
863 #ifdef ASSERT
864 Label verify_continue;
865 push(rax);
866 push(rbx);
867 push(rcx);
868 push(rdx);
869 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
870 get_method(rbx);
871
872 // If the mdp is valid, it will point to a DataLayout header which is
873 // consistent with the bcp. The converse is highly probable also.
874 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
875 addptr(rdx, Address(rbx, Method::const_offset()));
876 lea(rdx, Address(rdx, ConstMethod::codes_offset()));
877 cmpptr(rdx, rsi);
878 jcc(Assembler::equal, verify_continue);
879 // rbx,: method
880 // rsi: bcp
881 // rcx: mdp
882 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
883 bind(verify_continue);
884 pop(rdx);
885 pop(rcx);
886 pop(rbx);
887 pop(rax);
888 #endif // ASSERT
889 }
890
891
892 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
893 // %%% this seems to be used to store counter data which is surely 32bits
894 // however 64bit side stores 64 bits which seems wrong
895 assert(ProfileInterpreter, "must be profiling interpreter");
896 Address data(mdp_in, constant);
897 movptr(data, value);
898 }
899
900
901 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
902 int constant,
903 bool decrement) {
904 // Counter address
905 Address data(mdp_in, constant);
906
907 increment_mdp_data_at(data, decrement);
908 }
909
910
911 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
912 bool decrement) {
913
914 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
915 assert(ProfileInterpreter, "must be profiling interpreter");
916
917 // %%% 64bit treats this as 64 bit which seems unlikely
918 if (decrement) {
919 // Decrement the register. Set condition codes.
920 addl(data, -DataLayout::counter_increment);
921 // If the decrement causes the counter to overflow, stay negative
922 Label L;
923 jcc(Assembler::negative, L);
924 addl(data, DataLayout::counter_increment);
925 bind(L);
926 } else {
927 assert(DataLayout::counter_increment == 1,
928 "flow-free idiom only works with 1");
929 // Increment the register. Set carry flag.
930 addl(data, DataLayout::counter_increment);
931 // If the increment causes the counter to overflow, pull back by 1.
932 sbbl(data, 0);
933 }
934 }
935
936
937 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
938 Register reg,
939 int constant,
940 bool decrement) {
941 Address data(mdp_in, reg, Address::times_1, constant);
942
943 increment_mdp_data_at(data, decrement);
944 }
945
946
947 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
948 assert(ProfileInterpreter, "must be profiling interpreter");
949 int header_offset = in_bytes(DataLayout::header_offset());
950 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
951 // Set the flag
952 orl(Address(mdp_in, header_offset), header_bits);
953 }
954
955
956
957 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
958 int offset,
959 Register value,
960 Register test_value_out,
961 Label& not_equal_continue) {
962 assert(ProfileInterpreter, "must be profiling interpreter");
963 if (test_value_out == noreg) {
964 cmpptr(value, Address(mdp_in, offset));
965 } else {
966 // Put the test value into a register, so caller can use it:
967 movptr(test_value_out, Address(mdp_in, offset));
968 cmpptr(test_value_out, value);
969 }
970 jcc(Assembler::notEqual, not_equal_continue);
971 }
972
973
974 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
975 assert(ProfileInterpreter, "must be profiling interpreter");
976 Address disp_address(mdp_in, offset_of_disp);
977 addptr(mdp_in,disp_address);
978 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
979 }
980
981
982 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
983 assert(ProfileInterpreter, "must be profiling interpreter");
984 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
985 addptr(mdp_in, disp_address);
986 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
987 }
988
989
990 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
991 assert(ProfileInterpreter, "must be profiling interpreter");
992 addptr(mdp_in, constant);
993 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
994 }
995
996
997 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
998 assert(ProfileInterpreter, "must be profiling interpreter");
999 push(return_bci); // save/restore across call_VM
1000 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
1001 pop(return_bci);
1002 }
1003
1004
1005 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
1006 if (ProfileInterpreter) {
1007 Label profile_continue;
1008
1009 // If no method data exists, go to profile_continue.
1010 // Otherwise, assign to mdp
1011 test_method_data_pointer(mdp, profile_continue);
1012
1013 // We are taking a branch. Increment the taken count.
1014 // We inline increment_mdp_data_at to return bumped_count in a register
1015 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1016 Address data(mdp, in_bytes(JumpData::taken_offset()));
1017
1018 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
1019 movl(bumped_count,data);
1020 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
1021 addl(bumped_count, DataLayout::counter_increment);
1022 sbbl(bumped_count, 0);
1023 movl(data,bumped_count); // Store back out
1024
1025 // The method data pointer needs to be updated to reflect the new target.
1026 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1027 bind (profile_continue);
1028 }
1029 }
1030
1031
1032 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1033 if (ProfileInterpreter) {
1034 Label profile_continue;
1035
1036 // If no method data exists, go to profile_continue.
1037 test_method_data_pointer(mdp, profile_continue);
1038
1039 // We are taking a branch. Increment the not taken count.
1040 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1041
1042 // The method data pointer needs to be updated to correspond to the next bytecode
1043 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1044 bind (profile_continue);
1045 }
1046 }
1047
1048 void InterpreterMacroAssembler::profile_call(Register mdp) {
1049 if (ProfileInterpreter) {
1050 Label profile_continue;
1051
1052 // If no method data exists, go to profile_continue.
1053 test_method_data_pointer(mdp, profile_continue);
1054
1055 // We are making a call. Increment the count.
1056 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1057
1058 // The method data pointer needs to be updated to reflect the new target.
1059 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1060 bind (profile_continue);
1061 }
1062 }
1063
1064
1065 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1066 if (ProfileInterpreter) {
1067 Label profile_continue;
1068
1069 // If no method data exists, go to profile_continue.
1070 test_method_data_pointer(mdp, profile_continue);
1071
1072 // We are making a call. Increment the count.
1073 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1074
1075 // The method data pointer needs to be updated to reflect the new target.
1076 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1077 bind (profile_continue);
1078 }
1079 }
1080
1081
1082 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp,
1083 Register reg2,
1084 bool receiver_can_be_null) {
1085 if (ProfileInterpreter) {
1086 Label profile_continue;
1087
1088 // If no method data exists, go to profile_continue.
1089 test_method_data_pointer(mdp, profile_continue);
1090
1091 Label skip_receiver_profile;
1092 if (receiver_can_be_null) {
1093 Label not_null;
1094 testptr(receiver, receiver);
1095 jccb(Assembler::notZero, not_null);
1096 // We are making a call. Increment the count for null receiver.
1097 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1098 jmp(skip_receiver_profile);
1099 bind(not_null);
1100 }
1101
1102 // Record the receiver type.
1103 record_klass_in_profile(receiver, mdp, reg2, true);
1104 bind(skip_receiver_profile);
1105
1106 // The method data pointer needs to be updated to reflect the new target.
1107 update_mdp_by_constant(mdp,
1108 in_bytes(VirtualCallData::
1109 virtual_call_data_size()));
1110 bind(profile_continue);
1111 }
1112 }
1113
1114
1115 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1116 Register receiver, Register mdp,
1117 Register reg2, int start_row,
1118 Label& done, bool is_virtual_call) {
1119 if (TypeProfileWidth == 0) {
1120 if (is_virtual_call) {
1121 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1122 }
1123 return;
1124 }
1125
1126 int last_row = VirtualCallData::row_limit() - 1;
1127 assert(start_row <= last_row, "must be work left to do");
1128 // Test this row for both the receiver and for null.
1129 // Take any of three different outcomes:
1130 // 1. found receiver => increment count and goto done
1131 // 2. found null => keep looking for case 1, maybe allocate this cell
1132 // 3. found something else => keep looking for cases 1 and 2
1133 // Case 3 is handled by a recursive call.
1134 for (int row = start_row; row <= last_row; row++) {
1135 Label next_test;
1136 bool test_for_null_also = (row == start_row);
1137
1138 // See if the receiver is receiver[n].
1139 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1140 test_mdp_data_at(mdp, recvr_offset, receiver,
1141 (test_for_null_also ? reg2 : noreg),
1142 next_test);
1143 // (Reg2 now contains the receiver from the CallData.)
1144
1145 // The receiver is receiver[n]. Increment count[n].
1146 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1147 increment_mdp_data_at(mdp, count_offset);
1148 jmp(done);
1149 bind(next_test);
1150
1151 if (row == start_row) {
1152 Label found_null;
1153 // Failed the equality check on receiver[n]... Test for null.
1154 testptr(reg2, reg2);
1155 if (start_row == last_row) {
1156 // The only thing left to do is handle the null case.
1157 if (is_virtual_call) {
1158 jccb(Assembler::zero, found_null);
1159 // Receiver did not match any saved receiver and there is no empty row for it.
1160 // Increment total counter to indicate polymorphic case.
1161 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1162 jmp(done);
1163 bind(found_null);
1164 } else {
1165 jcc(Assembler::notZero, done);
1166 }
1167 break;
1168 }
1169 // Since null is rare, make it be the branch-taken case.
1170 jcc(Assembler::zero, found_null);
1171
1172 // Put all the "Case 3" tests here.
1173 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1174
1175 // Found a null. Keep searching for a matching receiver,
1176 // but remember that this is an empty (unused) slot.
1177 bind(found_null);
1178 }
1179 }
1180
1181 // In the fall-through case, we found no matching receiver, but we
1182 // observed the receiver[start_row] is NULL.
1183
1184 // Fill in the receiver field and increment the count.
1185 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1186 set_mdp_data_at(mdp, recvr_offset, receiver);
1187 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1188 movptr(reg2, (intptr_t)DataLayout::counter_increment);
1189 set_mdp_data_at(mdp, count_offset, reg2);
1190 if (start_row > 0) {
1191 jmp(done);
1192 }
1193 }
1194
1195 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1196 Register mdp, Register reg2,
1197 bool is_virtual_call) {
1198 assert(ProfileInterpreter, "must be profiling");
1199 Label done;
1200
1201 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1202
1203 bind (done);
1204 }
1205
1206 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
1207 if (ProfileInterpreter) {
1208 Label profile_continue;
1209 uint row;
1210
1211 // If no method data exists, go to profile_continue.
1212 test_method_data_pointer(mdp, profile_continue);
1213
1214 // Update the total ret count.
1215 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1216
1217 for (row = 0; row < RetData::row_limit(); row++) {
1218 Label next_test;
1219
1220 // See if return_bci is equal to bci[n]:
1221 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
1222 noreg, next_test);
1223
1224 // return_bci is equal to bci[n]. Increment the count.
1225 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1226
1227 // The method data pointer needs to be updated to reflect the new target.
1228 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
1229 jmp(profile_continue);
1230 bind(next_test);
1231 }
1232
1233 update_mdp_for_ret(return_bci);
1234
1235 bind (profile_continue);
1236 }
1237 }
1238
1239
1240 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1241 if (ProfileInterpreter) {
1242 Label profile_continue;
1243
1244 // If no method data exists, go to profile_continue.
1245 test_method_data_pointer(mdp, profile_continue);
1246
1247 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1248
1249 // The method data pointer needs to be updated.
1250 int mdp_delta = in_bytes(BitData::bit_data_size());
1251 if (TypeProfileCasts) {
1252 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1253 }
1254 update_mdp_by_constant(mdp, mdp_delta);
1255
1256 bind (profile_continue);
1257 }
1258 }
1259
1260
1261 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1262 if (ProfileInterpreter && TypeProfileCasts) {
1263 Label profile_continue;
1264
1265 // If no method data exists, go to profile_continue.
1266 test_method_data_pointer(mdp, profile_continue);
1267
1268 int count_offset = in_bytes(CounterData::count_offset());
1269 // Back up the address, since we have already bumped the mdp.
1270 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1271
1272 // *Decrement* the counter. We expect to see zero or small negatives.
1273 increment_mdp_data_at(mdp, count_offset, true);
1274
1275 bind (profile_continue);
1276 }
1277 }
1278
1279
1280 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
1281 {
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 // The method data pointer needs to be updated.
1289 int mdp_delta = in_bytes(BitData::bit_data_size());
1290 if (TypeProfileCasts) {
1291 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1292
1293 // Record the object type.
1294 record_klass_in_profile(klass, mdp, reg2, false);
1295 assert(reg2 == rdi, "we know how to fix this blown reg");
1296 restore_locals(); // Restore EDI
1297 }
1298 update_mdp_by_constant(mdp, mdp_delta);
1299
1300 bind(profile_continue);
1301 }
1302 }
1303
1304
1305 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1306 if (ProfileInterpreter) {
1307 Label profile_continue;
1308
1309 // If no method data exists, go to profile_continue.
1310 test_method_data_pointer(mdp, profile_continue);
1311
1312 // Update the default case count
1313 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1314
1315 // The method data pointer needs to be updated.
1316 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
1317
1318 bind (profile_continue);
1319 }
1320 }
1321
1322
1323 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
1324 if (ProfileInterpreter) {
1325 Label profile_continue;
1326
1327 // If no method data exists, go to profile_continue.
1328 test_method_data_pointer(mdp, profile_continue);
1329
1330 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1331 movptr(reg2, (intptr_t)in_bytes(MultiBranchData::per_case_size()));
1332 // index is positive and so should have correct value if this code were
1333 // used on 64bits
1334 imulptr(index, reg2);
1335 addptr(index, in_bytes(MultiBranchData::case_array_offset()));
1336
1337 // Update the case count
1338 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1339
1340 // The method data pointer needs to be updated.
1341 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
1342
1343 bind (profile_continue);
1344 }
1345 }
1346
1347 #endif // !CC_INTERP
1348
1349
1350
1351 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1352 if (state == atos) MacroAssembler::verify_oop(reg);
1353 }
1354
1355
1356 #ifndef CC_INTERP
1357 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1358 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1359 }
1360
1361 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1362 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1363 int increment, Address mask,
1364 Register scratch, bool preloaded,
1365 Condition cond, Label* where) {
1366 if (!preloaded) {
1367 movl(scratch, counter_addr);
1368 }
1369 incrementl(scratch, increment);
1370 movl(counter_addr, scratch);
1371 andl(scratch, mask);
1372 jcc(cond, *where);
1373 }
1374 #endif /* CC_INTERP */
1375
1376
1377 void InterpreterMacroAssembler::notify_method_entry() {
1378 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1379 // track stack depth. If it is possible to enter interp_only_mode we add
1380 // the code to check if the event should be sent.
1381 if (JvmtiExport::can_post_interpreter_events()) {
1382 Label L;
1383 get_thread(rcx);
1384 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1385 testl(rcx,rcx);
1386 jcc(Assembler::zero, L);
1387 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
1388 bind(L);
1389 }
1390
1391 {
1392 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1393 get_thread(rcx);
1394 get_method(rbx);
1395 call_VM_leaf(
1396 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
1397 }
1398
1399 // RedefineClasses() tracing support for obsolete method entry
1400 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1401 get_thread(rcx);
1402 get_method(rbx);
1403 call_VM_leaf(
1404 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1405 rcx, rbx);
1406 }
1407 }
1408
1409
1410 void InterpreterMacroAssembler::notify_method_exit(
1411 TosState state, NotifyMethodExitMode mode) {
1412 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1413 // track stack depth. If it is possible to enter interp_only_mode we add
1414 // the code to check if the event should be sent.
1415 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1416 Label L;
1417 // Note: frame::interpreter_frame_result has a dependency on how the
1418 // method result is saved across the call to post_method_exit. If this
1419 // is changed then the interpreter_frame_result implementation will
1420 // need to be updated too.
1421
1422 // For c++ interpreter the result is always stored at a known location in the frame
1423 // template interpreter will leave it on the top of the stack.
1424 NOT_CC_INTERP(push(state);)
1425 get_thread(rcx);
1426 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1427 testl(rcx,rcx);
1428 jcc(Assembler::zero, L);
1429 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1430 bind(L);
1431 NOT_CC_INTERP(pop(state);)
1432 }
1433
1434 {
1435 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1436 NOT_CC_INTERP(push(state));
1437 get_thread(rbx);
1438 get_method(rcx);
1439 call_VM_leaf(
1440 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1441 rbx, rcx);
1442 NOT_CC_INTERP(pop(state));
1443 }
1444 }