1 /*
2 * Copyright (c) 1997, 2012, 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/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 #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(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
227 notl(reg); // convert to plain index
228 } else if (index_size == sizeof(u1)) {
229 load_unsigned_byte(reg, Address(rsi, bcp_offset));
230 } else {
231 ShouldNotReachHere();
232 }
233 }
234
235
236 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index,
237 int bcp_offset, size_t index_size) {
238 assert_different_registers(cache, index);
239 get_cache_index_at_bcp(index, bcp_offset, index_size);
240 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
241 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
242 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
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, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
255 const int shift_count = (1 + byte_no) * BitsPerByte;
256 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
257 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
258 "correct shift count");
259 shrptr(bytecode, shift_count);
260 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
261 andptr(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
262 }
263
264
265 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
266 int bcp_offset, size_t index_size) {
267 assert(cache != tmp, "must use different register");
268 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
269 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
270 // convert from field index to ConstantPoolCacheEntry index
271 // and from word offset to byte offset
272 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
273 shll(tmp, 2 + LogBytesPerWord);
274 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
275 // skip past the header
276 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
277 addptr(cache, tmp); // construct pointer to cache entry
278 }
279
280 // Load object from cpool->resolved_references(index)
281 void InterpreterMacroAssembler::load_resolved_reference_at_index(
282 Register result, Register index) {
283 assert_different_registers(result, index);
284 // convert from field index to resolved_references() index and from
285 // word index to byte offset. Since this is a java object, it can be compressed
286 Register tmp = index; // reuse
287 shll(tmp, LogBytesPerHeapOop);
288
289 get_constant_pool(result);
290 // load pointer for resolved_references[] objArray
291 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes()));
292 // JNIHandles::resolve(obj);
293 movptr(result, Address(result, 0));
294 // Add in the index
295 addptr(result, tmp);
296 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
297 }
298
299 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
300 // a subtype of super_klass. EAX holds the super_klass. Blows ECX.
301 // Resets EDI to locals. Register sub_klass cannot be any of the above.
302 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
303 assert( Rsub_klass != rax, "rax, holds superklass" );
304 assert( Rsub_klass != rcx, "used as a temp" );
305 assert( Rsub_klass != rdi, "used as a temp, restored from locals" );
306
307 // Profile the not-null value's klass.
308 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
309
310 // Do the check.
311 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
312
313 // Profile the failure of the check.
314 profile_typecheck_failed(rcx); // blows rcx
315 }
316
317 void InterpreterMacroAssembler::f2ieee() {
318 if (IEEEPrecision) {
319 fstp_s(Address(rsp, 0));
320 fld_s(Address(rsp, 0));
321 }
322 }
323
324
325 void InterpreterMacroAssembler::d2ieee() {
326 if (IEEEPrecision) {
327 fstp_d(Address(rsp, 0));
328 fld_d(Address(rsp, 0));
329 }
330 }
331
332 // Java Expression Stack
333
334 void InterpreterMacroAssembler::pop_ptr(Register r) {
335 pop(r);
336 }
337
338 void InterpreterMacroAssembler::pop_i(Register r) {
339 pop(r);
340 }
341
342 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
343 pop(lo);
344 pop(hi);
345 }
346
347 void InterpreterMacroAssembler::pop_f() {
348 fld_s(Address(rsp, 0));
349 addptr(rsp, 1 * wordSize);
350 }
351
352 void InterpreterMacroAssembler::pop_d() {
353 fld_d(Address(rsp, 0));
354 addptr(rsp, 2 * wordSize);
355 }
356
357
358 void InterpreterMacroAssembler::pop(TosState state) {
359 switch (state) {
360 case atos: pop_ptr(rax); break;
361 case btos: // fall through
362 case ctos: // fall through
363 case stos: // fall through
364 case itos: pop_i(rax); break;
365 case ltos: pop_l(rax, rdx); break;
366 case ftos: pop_f(); break;
367 case dtos: pop_d(); break;
368 case vtos: /* nothing to do */ break;
369 default : ShouldNotReachHere();
370 }
371 verify_oop(rax, state);
372 }
373
374 void InterpreterMacroAssembler::push_ptr(Register r) {
375 push(r);
376 }
377
378 void InterpreterMacroAssembler::push_i(Register r) {
379 push(r);
380 }
381
382 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
383 push(hi);
384 push(lo);
385 }
386
387 void InterpreterMacroAssembler::push_f() {
388 // Do not schedule for no AGI! Never write beyond rsp!
389 subptr(rsp, 1 * wordSize);
390 fstp_s(Address(rsp, 0));
391 }
392
393 void InterpreterMacroAssembler::push_d(Register r) {
394 // Do not schedule for no AGI! Never write beyond rsp!
395 subptr(rsp, 2 * wordSize);
396 fstp_d(Address(rsp, 0));
397 }
398
399
400 void InterpreterMacroAssembler::push(TosState state) {
401 verify_oop(rax, state);
402 switch (state) {
403 case atos: push_ptr(rax); break;
404 case btos: // fall through
405 case ctos: // fall through
406 case stos: // fall through
407 case itos: push_i(rax); break;
408 case ltos: push_l(rax, rdx); break;
409 case ftos: push_f(); break;
410 case dtos: push_d(rax); break;
411 case vtos: /* nothing to do */ break;
412 default : ShouldNotReachHere();
413 }
414 }
415
416
417 // Helpers for swap and dup
418 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
419 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
420 }
421
422 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
423 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
424 }
425
426 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
427 // set sender sp
428 lea(rsi, Address(rsp, wordSize));
429 // record last_sp
430 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
431 }
432
433
434 // Jump to from_interpreted entry of a call unless single stepping is possible
435 // in this thread in which case we must call the i2i entry
436 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
437 prepare_to_jump_from_interpreted();
438
439 if (JvmtiExport::can_post_interpreter_events()) {
440 Label run_compiled_code;
441 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
442 // compiled code in threads for which the event is enabled. Check here for
443 // interp_only_mode if these events CAN be enabled.
444 get_thread(temp);
445 // interp_only is an int, on little endian it is sufficient to test the byte only
446 // Is a cmpl faster?
447 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
448 jccb(Assembler::zero, run_compiled_code);
449 jmp(Address(method, Method::interpreter_entry_offset()));
450 bind(run_compiled_code);
451 }
452
453 jmp(Address(method, Method::from_interpreted_offset()));
454
455 }
456
457
458 // The following two routines provide a hook so that an implementation
459 // can schedule the dispatch in two parts. Intel does not do this.
460 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
461 // Nothing Intel-specific to be done here.
462 }
463
464 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
465 dispatch_next(state, step);
466 }
467
468 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
469 bool verifyoop) {
470 verify_FPU(1, state);
471 if (VerifyActivationFrameSize) {
472 Label L;
473 mov(rcx, rbp);
474 subptr(rcx, rsp);
475 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
476 cmpptr(rcx, min_frame_size);
477 jcc(Assembler::greaterEqual, L);
478 stop("broken stack frame");
479 bind(L);
480 }
481 if (verifyoop) verify_oop(rax, state);
482 Address index(noreg, rbx, Address::times_ptr);
483 ExternalAddress tbl((address)table);
484 ArrayAddress dispatch(tbl, index);
485 jump(dispatch);
486 }
487
488
489 void InterpreterMacroAssembler::dispatch_only(TosState state) {
490 dispatch_base(state, Interpreter::dispatch_table(state));
491 }
492
493
494 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
495 dispatch_base(state, Interpreter::normal_table(state));
496 }
497
498 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
499 dispatch_base(state, Interpreter::normal_table(state), false);
500 }
501
502
503 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
504 // load next bytecode (load before advancing rsi to prevent AGI)
505 load_unsigned_byte(rbx, Address(rsi, step));
506 // advance rsi
507 increment(rsi, step);
508 dispatch_base(state, Interpreter::dispatch_table(state));
509 }
510
511
512 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
513 // load current bytecode
514 load_unsigned_byte(rbx, Address(rsi, 0));
515 dispatch_base(state, table);
516 }
517
518 // remove activation
519 //
520 // Unlock the receiver if this is a synchronized method.
521 // Unlock any Java monitors from syncronized blocks.
522 // Remove the activation from the stack.
523 //
524 // If there are locked Java monitors
525 // If throw_monitor_exception
526 // throws IllegalMonitorStateException
527 // Else if install_monitor_exception
528 // installs IllegalMonitorStateException
529 // Else
530 // no error processing
531 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
532 bool throw_monitor_exception,
533 bool install_monitor_exception,
534 bool notify_jvmdi) {
535 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
536 // check if synchronized method
537 Label unlocked, unlock, no_unlock;
538
539 get_thread(rcx);
540 const Address do_not_unlock_if_synchronized(rcx,
541 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
542
543 movbool(rbx, do_not_unlock_if_synchronized);
544 mov(rdi,rbx);
545 movbool(do_not_unlock_if_synchronized, false); // reset the flag
546
547 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
548 movl(rcx, Address(rbx, Method::access_flags_offset()));
549
550 testl(rcx, JVM_ACC_SYNCHRONIZED);
551 jcc(Assembler::zero, unlocked);
552
553 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
554 // is set.
555 mov(rcx,rdi);
556 testbool(rcx);
557 jcc(Assembler::notZero, no_unlock);
558
559 // unlock monitor
560 push(state); // save result
561
562 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
563 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
564 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
565 lea (rdx, monitor); // address of first monitor
566
567 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
568 testptr(rax, rax);
569 jcc (Assembler::notZero, unlock);
570
571 pop(state);
572 if (throw_monitor_exception) {
573 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
574
575 // Entry already unlocked, need to throw exception
576 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
577 should_not_reach_here();
578 } else {
579 // Monitor already unlocked during a stack unroll.
580 // If requested, install an illegal_monitor_state_exception.
581 // Continue with stack unrolling.
582 if (install_monitor_exception) {
583 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
584 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
585 }
586 jmp(unlocked);
587 }
588
589 bind(unlock);
590 unlock_object(rdx);
591 pop(state);
592
593 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
594 bind(unlocked);
595
596 // rax, rdx: Might contain return value
597
598 // Check that all monitors are unlocked
599 {
600 Label loop, exception, entry, restart;
601 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
602 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
603 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
604
605 bind(restart);
606 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry
607 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block
608 jmp(entry);
609
610 // Entry already locked, need to throw exception
611 bind(exception);
612
613 if (throw_monitor_exception) {
614 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
615
616 // Throw exception
617 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
618 should_not_reach_here();
619 } else {
620 // Stack unrolling. Unlock object and install illegal_monitor_exception
621 // Unlock does not block, so don't have to worry about the frame
622
623 push(state);
624 mov(rdx, rcx);
625 unlock_object(rdx);
626 pop(state);
627
628 if (install_monitor_exception) {
629 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
630 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
631 }
632
633 jmp(restart);
634 }
635
636 bind(loop);
637 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used
638 jcc(Assembler::notEqual, exception);
639
640 addptr(rcx, entry_size); // otherwise advance to next entry
641 bind(entry);
642 cmpptr(rcx, rbx); // check if bottom reached
643 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
644 }
645
646 bind(no_unlock);
647
648 // jvmti support
649 if (notify_jvmdi) {
650 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
651 } else {
652 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
653 }
654
655 // remove activation
656 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
657 leave(); // remove frame anchor
658 pop(ret_addr); // get return address
659 mov(rsp, rbx); // set sp to sender sp
660 if (UseSSE) {
661 // float and double are returned in xmm register in SSE-mode
662 if (state == ftos && UseSSE >= 1) {
663 subptr(rsp, wordSize);
664 fstp_s(Address(rsp, 0));
665 movflt(xmm0, Address(rsp, 0));
666 addptr(rsp, wordSize);
667 } else if (state == dtos && UseSSE >= 2) {
668 subptr(rsp, 2*wordSize);
669 fstp_d(Address(rsp, 0));
670 movdbl(xmm0, Address(rsp, 0));
671 addptr(rsp, 2*wordSize);
672 }
673 }
674 }
675
676 #endif /* !CC_INTERP */
677
678
679 // Lock object
680 //
681 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
682 // be initialized with object to lock
683 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
684 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
685
686 if (UseHeavyMonitors) {
687 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
688 } else {
689
690 Label done;
691
692 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
693 const Register obj_reg = rcx; // Will contain the oop
694
695 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
696 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
697 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
698
699 Label slow_case;
700
701 // Load object pointer into obj_reg %rcx
702 movptr(obj_reg, Address(lock_reg, obj_offset));
703
704 if (UseBiasedLocking) {
705 // Note: we use noreg for the temporary register since it's hard
706 // to come up with a free register on all incoming code paths
707 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
708 }
709
710 // Load immediate 1 into swap_reg %rax,
711 movptr(swap_reg, (int32_t)1);
712
713 // Load (object->mark() | 1) into swap_reg %rax,
714 orptr(swap_reg, Address(obj_reg, 0));
715
716 // Save (object->mark() | 1) into BasicLock's displaced header
717 movptr(Address(lock_reg, mark_offset), swap_reg);
718
719 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
720 if (os::is_MP()) {
721 lock();
722 }
723 cmpxchgptr(lock_reg, Address(obj_reg, 0));
724 if (PrintBiasedLockingStatistics) {
725 cond_inc32(Assembler::zero,
726 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
727 }
728 jcc(Assembler::zero, done);
729
730 // Test if the oopMark is an obvious stack pointer, i.e.,
731 // 1) (mark & 3) == 0, and
732 // 2) rsp <= mark < mark + os::pagesize()
733 //
734 // These 3 tests can be done by evaluating the following
735 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
736 // assuming both stack pointer and pagesize have their
737 // least significant 2 bits clear.
738 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
739 subptr(swap_reg, rsp);
740 andptr(swap_reg, 3 - os::vm_page_size());
741
742 // Save the test result, for recursive case, the result is zero
743 movptr(Address(lock_reg, mark_offset), swap_reg);
744
745 if (PrintBiasedLockingStatistics) {
746 cond_inc32(Assembler::zero,
747 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
748 }
749 jcc(Assembler::zero, done);
750
751 bind(slow_case);
752
753 // Call the runtime routine for slow case
754 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
755
756 bind(done);
757 }
758 }
759
760
761 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
762 //
763 // Argument: rdx : Points to BasicObjectLock structure for lock
764 // Throw an IllegalMonitorException if object is not locked by current thread
765 //
766 // Uses: rax, rbx, rcx, rdx
767 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
768 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
769
770 if (UseHeavyMonitors) {
771 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
772 } else {
773 Label done;
774
775 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
776 const Register header_reg = rbx; // Will contain the old oopMark
777 const Register obj_reg = rcx; // Will contain the oop
778
779 save_bcp(); // Save in case of exception
780
781 // Convert from BasicObjectLock structure to object and BasicLock structure
782 // Store the BasicLock address into %rax,
783 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
784
785 // Load oop into obj_reg(%rcx)
786 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
787
788 // Free entry
789 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
790
791 if (UseBiasedLocking) {
792 biased_locking_exit(obj_reg, header_reg, done);
793 }
794
795 // Load the old header from BasicLock structure
796 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
797
798 // Test for recursion
799 testptr(header_reg, header_reg);
800
801 // zero for recursive case
802 jcc(Assembler::zero, done);
803
804 // Atomic swap back the old header
805 if (os::is_MP()) lock();
806 cmpxchgptr(header_reg, Address(obj_reg, 0));
807
808 // zero for recursive case
809 jcc(Assembler::zero, done);
810
811 // Call the runtime routine for slow case.
812 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
813 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
814
815 bind(done);
816
817 restore_bcp();
818 }
819 }
820
821
822 #ifndef CC_INTERP
823
824 // Test ImethodDataPtr. If it is null, continue at the specified label
825 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
826 assert(ProfileInterpreter, "must be profiling interpreter");
827 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
828 testptr(mdp, mdp);
829 jcc(Assembler::zero, zero_continue);
830 }
831
832
833 // Set the method data pointer for the current bcp.
834 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
835 assert(ProfileInterpreter, "must be profiling interpreter");
836 Label set_mdp;
837 push(rax);
838 push(rbx);
839
840 get_method(rbx);
841 // Test MDO to avoid the call if it is NULL.
842 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
843 testptr(rax, rax);
844 jcc(Assembler::zero, set_mdp);
845 // rbx,: method
846 // rsi: bcp
847 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
848 // rax,: mdi
849 // mdo is guaranteed to be non-zero here, we checked for it before the call.
850 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
851 addptr(rbx, in_bytes(MethodData::data_offset()));
852 addptr(rax, rbx);
853 bind(set_mdp);
854 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
855 pop(rbx);
856 pop(rax);
857 }
858
859 void InterpreterMacroAssembler::verify_method_data_pointer() {
860 assert(ProfileInterpreter, "must be profiling interpreter");
861 #ifdef ASSERT
862 Label verify_continue;
863 push(rax);
864 push(rbx);
865 push(rcx);
866 push(rdx);
867 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
868 get_method(rbx);
869
870 // If the mdp is valid, it will point to a DataLayout header which is
871 // consistent with the bcp. The converse is highly probable also.
872 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
873 addptr(rdx, Address(rbx, Method::const_offset()));
874 lea(rdx, Address(rdx, ConstMethod::codes_offset()));
875 cmpptr(rdx, rsi);
876 jcc(Assembler::equal, verify_continue);
877 // rbx,: method
878 // rsi: bcp
879 // rcx: mdp
880 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
881 bind(verify_continue);
882 pop(rdx);
883 pop(rcx);
884 pop(rbx);
885 pop(rax);
886 #endif // ASSERT
887 }
888
889
890 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
891 // %%% this seems to be used to store counter data which is surely 32bits
892 // however 64bit side stores 64 bits which seems wrong
893 assert(ProfileInterpreter, "must be profiling interpreter");
894 Address data(mdp_in, constant);
895 movptr(data, value);
896 }
897
898
899 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
900 int constant,
901 bool decrement) {
902 // Counter address
903 Address data(mdp_in, constant);
904
905 increment_mdp_data_at(data, decrement);
906 }
907
908
909 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
910 bool decrement) {
911
912 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
913 assert(ProfileInterpreter, "must be profiling interpreter");
914
915 // %%% 64bit treats this as 64 bit which seems unlikely
916 if (decrement) {
917 // Decrement the register. Set condition codes.
918 addl(data, -DataLayout::counter_increment);
919 // If the decrement causes the counter to overflow, stay negative
920 Label L;
921 jcc(Assembler::negative, L);
922 addl(data, DataLayout::counter_increment);
923 bind(L);
924 } else {
925 assert(DataLayout::counter_increment == 1,
926 "flow-free idiom only works with 1");
927 // Increment the register. Set carry flag.
928 addl(data, DataLayout::counter_increment);
929 // If the increment causes the counter to overflow, pull back by 1.
930 sbbl(data, 0);
931 }
932 }
933
934
935 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
936 Register reg,
937 int constant,
938 bool decrement) {
939 Address data(mdp_in, reg, Address::times_1, constant);
940
941 increment_mdp_data_at(data, decrement);
942 }
943
944
945 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
946 assert(ProfileInterpreter, "must be profiling interpreter");
947 int header_offset = in_bytes(DataLayout::header_offset());
948 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
949 // Set the flag
950 orl(Address(mdp_in, header_offset), header_bits);
951 }
952
953
954
955 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
956 int offset,
957 Register value,
958 Register test_value_out,
959 Label& not_equal_continue) {
960 assert(ProfileInterpreter, "must be profiling interpreter");
961 if (test_value_out == noreg) {
962 cmpptr(value, Address(mdp_in, offset));
963 } else {
964 // Put the test value into a register, so caller can use it:
965 movptr(test_value_out, Address(mdp_in, offset));
966 cmpptr(test_value_out, value);
967 }
968 jcc(Assembler::notEqual, not_equal_continue);
969 }
970
971
972 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
973 assert(ProfileInterpreter, "must be profiling interpreter");
974 Address disp_address(mdp_in, offset_of_disp);
975 addptr(mdp_in,disp_address);
976 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
977 }
978
979
980 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
981 assert(ProfileInterpreter, "must be profiling interpreter");
982 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
983 addptr(mdp_in, disp_address);
984 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
985 }
986
987
988 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
989 assert(ProfileInterpreter, "must be profiling interpreter");
990 addptr(mdp_in, constant);
991 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
992 }
993
994
995 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
996 assert(ProfileInterpreter, "must be profiling interpreter");
997 push(return_bci); // save/restore across call_VM
998 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
999 pop(return_bci);
1000 }
1001
1002
1003 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
1004 if (ProfileInterpreter) {
1005 Label profile_continue;
1006
1007 // If no method data exists, go to profile_continue.
1008 // Otherwise, assign to mdp
1009 test_method_data_pointer(mdp, profile_continue);
1010
1011 // We are taking a branch. Increment the taken count.
1012 // We inline increment_mdp_data_at to return bumped_count in a register
1013 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1014 Address data(mdp, in_bytes(JumpData::taken_offset()));
1015
1016 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
1017 movl(bumped_count,data);
1018 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
1019 addl(bumped_count, DataLayout::counter_increment);
1020 sbbl(bumped_count, 0);
1021 movl(data,bumped_count); // Store back out
1022
1023 // The method data pointer needs to be updated to reflect the new target.
1024 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1025 bind (profile_continue);
1026 }
1027 }
1028
1029
1030 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1031 if (ProfileInterpreter) {
1032 Label profile_continue;
1033
1034 // If no method data exists, go to profile_continue.
1035 test_method_data_pointer(mdp, profile_continue);
1036
1037 // We are taking a branch. Increment the not taken count.
1038 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1039
1040 // The method data pointer needs to be updated to correspond to the next bytecode
1041 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1042 bind (profile_continue);
1043 }
1044 }
1045
1046
1047 void InterpreterMacroAssembler::profile_call(Register mdp) {
1048 if (ProfileInterpreter) {
1049 Label profile_continue;
1050
1051 // If no method data exists, go to profile_continue.
1052 test_method_data_pointer(mdp, profile_continue);
1053
1054 // We are making a call. Increment the count.
1055 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1056
1057 // The method data pointer needs to be updated to reflect the new target.
1058 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1059 bind (profile_continue);
1060 }
1061 }
1062
1063
1064 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1065 if (ProfileInterpreter) {
1066 Label profile_continue;
1067
1068 // If no method data exists, go to profile_continue.
1069 test_method_data_pointer(mdp, profile_continue);
1070
1071 // We are making a call. Increment the count.
1072 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1073
1074 // The method data pointer needs to be updated to reflect the new target.
1075 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1076 bind (profile_continue);
1077 }
1078 }
1079
1080
1081 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp,
1082 Register reg2,
1083 bool receiver_can_be_null) {
1084 if (ProfileInterpreter) {
1085 Label profile_continue;
1086
1087 // If no method data exists, go to profile_continue.
1088 test_method_data_pointer(mdp, profile_continue);
1089
1090 Label skip_receiver_profile;
1091 if (receiver_can_be_null) {
1092 Label not_null;
1093 testptr(receiver, receiver);
1094 jccb(Assembler::notZero, not_null);
1095 // We are making a call. Increment the count for null receiver.
1096 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1097 jmp(skip_receiver_profile);
1098 bind(not_null);
1099 }
1100
1101 // Record the receiver type.
1102 record_klass_in_profile(receiver, mdp, reg2, true);
1103 bind(skip_receiver_profile);
1104
1105 // The method data pointer needs to be updated to reflect the new target.
1106 update_mdp_by_constant(mdp,
1107 in_bytes(VirtualCallData::
1108 virtual_call_data_size()));
1109 bind(profile_continue);
1110 }
1111 }
1112
1113
1114 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1115 Register receiver, Register mdp,
1116 Register reg2, int start_row,
1117 Label& done, bool is_virtual_call) {
1118 if (TypeProfileWidth == 0) {
1119 if (is_virtual_call) {
1120 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1121 }
1122 return;
1123 }
1124
1125 int last_row = VirtualCallData::row_limit() - 1;
1126 assert(start_row <= last_row, "must be work left to do");
1127 // Test this row for both the receiver and for null.
1128 // Take any of three different outcomes:
1129 // 1. found receiver => increment count and goto done
1130 // 2. found null => keep looking for case 1, maybe allocate this cell
1131 // 3. found something else => keep looking for cases 1 and 2
1132 // Case 3 is handled by a recursive call.
1133 for (int row = start_row; row <= last_row; row++) {
1134 Label next_test;
1135 bool test_for_null_also = (row == start_row);
1136
1137 // See if the receiver is receiver[n].
1138 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1139 test_mdp_data_at(mdp, recvr_offset, receiver,
1140 (test_for_null_also ? reg2 : noreg),
1141 next_test);
1142 // (Reg2 now contains the receiver from the CallData.)
1143
1144 // The receiver is receiver[n]. Increment count[n].
1145 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1146 increment_mdp_data_at(mdp, count_offset);
1147 jmp(done);
1148 bind(next_test);
1149
1150 if (row == start_row) {
1151 Label found_null;
1152 // Failed the equality check on receiver[n]... Test for null.
1153 testptr(reg2, reg2);
1154 if (start_row == last_row) {
1155 // The only thing left to do is handle the null case.
1156 if (is_virtual_call) {
1157 jccb(Assembler::zero, found_null);
1158 // Receiver did not match any saved receiver and there is no empty row for it.
1159 // Increment total counter to indicate polymorphic case.
1160 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1161 jmp(done);
1162 bind(found_null);
1163 } else {
1164 jcc(Assembler::notZero, done);
1165 }
1166 break;
1167 }
1168 // Since null is rare, make it be the branch-taken case.
1169 jcc(Assembler::zero, found_null);
1170
1171 // Put all the "Case 3" tests here.
1172 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1173
1174 // Found a null. Keep searching for a matching receiver,
1175 // but remember that this is an empty (unused) slot.
1176 bind(found_null);
1177 }
1178 }
1179
1180 // In the fall-through case, we found no matching receiver, but we
1181 // observed the receiver[start_row] is NULL.
1182
1183 // Fill in the receiver field and increment the count.
1184 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1185 set_mdp_data_at(mdp, recvr_offset, receiver);
1186 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1187 movptr(reg2, (intptr_t)DataLayout::counter_increment);
1188 set_mdp_data_at(mdp, count_offset, reg2);
1189 if (start_row > 0) {
1190 jmp(done);
1191 }
1192 }
1193
1194 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1195 Register mdp, Register reg2,
1196 bool is_virtual_call) {
1197 assert(ProfileInterpreter, "must be profiling");
1198 Label done;
1199
1200 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1201
1202 bind (done);
1203 }
1204
1205 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
1206 if (ProfileInterpreter) {
1207 Label profile_continue;
1208 uint row;
1209
1210 // If no method data exists, go to profile_continue.
1211 test_method_data_pointer(mdp, profile_continue);
1212
1213 // Update the total ret count.
1214 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1215
1216 for (row = 0; row < RetData::row_limit(); row++) {
1217 Label next_test;
1218
1219 // See if return_bci is equal to bci[n]:
1220 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
1221 noreg, next_test);
1222
1223 // return_bci is equal to bci[n]. Increment the count.
1224 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1225
1226 // The method data pointer needs to be updated to reflect the new target.
1227 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
1228 jmp(profile_continue);
1229 bind(next_test);
1230 }
1231
1232 update_mdp_for_ret(return_bci);
1233
1234 bind (profile_continue);
1235 }
1236 }
1237
1238
1239 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1240 if (ProfileInterpreter) {
1241 Label profile_continue;
1242
1243 // If no method data exists, go to profile_continue.
1244 test_method_data_pointer(mdp, profile_continue);
1245
1246 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1247
1248 // The method data pointer needs to be updated.
1249 int mdp_delta = in_bytes(BitData::bit_data_size());
1250 if (TypeProfileCasts) {
1251 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1252 }
1253 update_mdp_by_constant(mdp, mdp_delta);
1254
1255 bind (profile_continue);
1256 }
1257 }
1258
1259
1260 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1261 if (ProfileInterpreter && TypeProfileCasts) {
1262 Label profile_continue;
1263
1264 // If no method data exists, go to profile_continue.
1265 test_method_data_pointer(mdp, profile_continue);
1266
1267 int count_offset = in_bytes(CounterData::count_offset());
1268 // Back up the address, since we have already bumped the mdp.
1269 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1270
1271 // *Decrement* the counter. We expect to see zero or small negatives.
1272 increment_mdp_data_at(mdp, count_offset, true);
1273
1274 bind (profile_continue);
1275 }
1276 }
1277
1278
1279 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
1280 {
1281 if (ProfileInterpreter) {
1282 Label profile_continue;
1283
1284 // If no method data exists, go to profile_continue.
1285 test_method_data_pointer(mdp, profile_continue);
1286
1287 // The method data pointer needs to be updated.
1288 int mdp_delta = in_bytes(BitData::bit_data_size());
1289 if (TypeProfileCasts) {
1290 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1291
1292 // Record the object type.
1293 record_klass_in_profile(klass, mdp, reg2, false);
1294 assert(reg2 == rdi, "we know how to fix this blown reg");
1295 restore_locals(); // Restore EDI
1296 }
1297 update_mdp_by_constant(mdp, mdp_delta);
1298
1299 bind(profile_continue);
1300 }
1301 }
1302
1303
1304 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1305 if (ProfileInterpreter) {
1306 Label profile_continue;
1307
1308 // If no method data exists, go to profile_continue.
1309 test_method_data_pointer(mdp, profile_continue);
1310
1311 // Update the default case count
1312 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1313
1314 // The method data pointer needs to be updated.
1315 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
1316
1317 bind (profile_continue);
1318 }
1319 }
1320
1321
1322 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
1323 if (ProfileInterpreter) {
1324 Label profile_continue;
1325
1326 // If no method data exists, go to profile_continue.
1327 test_method_data_pointer(mdp, profile_continue);
1328
1329 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1330 movptr(reg2, (intptr_t)in_bytes(MultiBranchData::per_case_size()));
1331 // index is positive and so should have correct value if this code were
1332 // used on 64bits
1333 imulptr(index, reg2);
1334 addptr(index, in_bytes(MultiBranchData::case_array_offset()));
1335
1336 // Update the case count
1337 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1338
1339 // The method data pointer needs to be updated.
1340 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
1341
1342 bind (profile_continue);
1343 }
1344 }
1345
1346 #endif // !CC_INTERP
1347
1348
1349
1350 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1351 if (state == atos) MacroAssembler::verify_oop(reg);
1352 }
1353
1354
1355 #ifndef CC_INTERP
1356 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1357 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1358 }
1359
1360 #endif /* CC_INTERP */
1361
1362
1363 void InterpreterMacroAssembler::notify_method_entry() {
1364 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1365 // track stack depth. If it is possible to enter interp_only_mode we add
1366 // the code to check if the event should be sent.
1367 if (JvmtiExport::can_post_interpreter_events()) {
1368 Label L;
1369 get_thread(rcx);
1370 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1371 testl(rcx,rcx);
1372 jcc(Assembler::zero, L);
1373 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
1374 bind(L);
1375 }
1376
1377 {
1378 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1379 get_thread(rcx);
1380 get_method(rbx);
1381 call_VM_leaf(
1382 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
1383 }
1384
1385 // RedefineClasses() tracing support for obsolete method entry
1386 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1387 get_thread(rcx);
1388 get_method(rbx);
1389 call_VM_leaf(
1390 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1391 rcx, rbx);
1392 }
1393 }
1394
1395
1396 void InterpreterMacroAssembler::notify_method_exit(
1397 TosState state, NotifyMethodExitMode mode) {
1398 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1399 // track stack depth. If it is possible to enter interp_only_mode we add
1400 // the code to check if the event should be sent.
1401 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1402 Label L;
1403 // Note: frame::interpreter_frame_result has a dependency on how the
1404 // method result is saved across the call to post_method_exit. If this
1405 // is changed then the interpreter_frame_result implementation will
1406 // need to be updated too.
1407
1408 // For c++ interpreter the result is always stored at a known location in the frame
1409 // template interpreter will leave it on the top of the stack.
1410 NOT_CC_INTERP(push(state);)
1411 get_thread(rcx);
1412 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1413 testl(rcx,rcx);
1414 jcc(Assembler::zero, L);
1415 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1416 bind(L);
1417 NOT_CC_INTERP(pop(state);)
1418 }
1419
1420 {
1421 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1422 NOT_CC_INTERP(push(state));
1423 get_thread(rbx);
1424 get_method(rcx);
1425 call_VM_leaf(
1426 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1427 rbx, rcx);
1428 NOT_CC_INTERP(pop(state));
1429 }
1430 }
1431
1432 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1433 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1434 int increment, int mask,
1435 Register scratch, bool preloaded,
1436 Condition cond, Label* where) {
1437 if (!preloaded) {
1438 movl(scratch, counter_addr);
1439 }
1440 incrementl(scratch, increment);
1441 movl(counter_addr, scratch);
1442 andl(scratch, mask);
1443 jcc(cond, *where);
1444 }