1 /*
2 * Copyright (c) 1997, 2018, 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 ztos: // fall through
155 case ctos: // fall through
156 case stos: // fall through
157 case itos: movl(rax, val_addr); break;
158 case ftos: fld_s(val_addr); break;
159 case dtos: fld_d(val_addr); break;
160 case vtos: /* nothing to do */ break;
161 default : ShouldNotReachHere();
162 }
163 // Clean up tos value in the thread object
164 movl(tos_addr, (int32_t) ilgl);
165 movptr(val_addr, NULL_WORD);
166 NOT_LP64(movptr(val_addr1, NULL_WORD));
167 }
168
169
170 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
171 if (JvmtiExport::can_force_early_return()) {
172 Label L;
173 Register tmp = java_thread;
174 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
175 testptr(tmp, tmp);
176 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
177
178 // Initiate earlyret handling only if it is not already being processed.
179 // If the flag has the earlyret_processing bit set, it means that this code
180 // is called *during* earlyret handling - we don't want to reenter.
181 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
182 cmpl(tmp, JvmtiThreadState::earlyret_pending);
183 jcc(Assembler::notEqual, L);
184
185 // Call Interpreter::remove_activation_early_entry() to get the address of the
186 // same-named entrypoint in the generated interpreter code.
187 get_thread(java_thread);
188 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
189 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
190 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
191 jmp(rax);
192 bind(L);
193 get_thread(java_thread);
194 }
195 }
196
197
198 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
199 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
200 load_unsigned_short(reg, Address(rsi, bcp_offset));
201 bswapl(reg);
202 shrl(reg, 16);
203 }
204
205
206 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) {
207 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
208 if (index_size == sizeof(u2)) {
209 load_unsigned_short(reg, Address(rsi, bcp_offset));
210 } else if (index_size == sizeof(u4)) {
211 assert(EnableInvokeDynamic, "giant index used only for JSR 292");
212 movl(reg, Address(rsi, bcp_offset));
213 // Check if the secondary index definition is still ~x, otherwise
214 // we have to change the following assembler code to calculate the
215 // plain index.
216 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
217 notl(reg); // convert to plain index
218 } else if (index_size == sizeof(u1)) {
219 load_unsigned_byte(reg, Address(rsi, bcp_offset));
220 } else {
221 ShouldNotReachHere();
222 }
223 }
224
225
226 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index,
227 int bcp_offset, size_t index_size) {
228 assert_different_registers(cache, index);
229 get_cache_index_at_bcp(index, bcp_offset, index_size);
230 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
231 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
232 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
233 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index
234 }
235
236
237 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
238 Register index,
239 Register bytecode,
240 int byte_no,
241 int bcp_offset,
242 size_t index_size) {
243 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
244 movptr(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
245 const int shift_count = (1 + byte_no) * BitsPerByte;
246 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
247 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
248 "correct shift count");
249 shrptr(bytecode, shift_count);
250 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
251 andptr(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
252 }
253
254
255 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
256 int bcp_offset, size_t index_size) {
257 assert(cache != tmp, "must use different register");
258 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
259 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
260 // convert from field index to ConstantPoolCacheEntry index
261 // and from word offset to byte offset
262 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
263 shll(tmp, 2 + LogBytesPerWord);
264 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
265 // skip past the header
266 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
267 addptr(cache, tmp); // construct pointer to cache entry
268 }
269
270 void InterpreterMacroAssembler::get_method_counters(Register method,
271 Register mcs, Label& skip) {
272 Label has_counters;
273 movptr(mcs, Address(method, Method::method_counters_offset()));
274 testptr(mcs, mcs);
275 jcc(Assembler::notZero, has_counters);
276 call_VM(noreg, CAST_FROM_FN_PTR(address,
277 InterpreterRuntime::build_method_counters), method);
278 movptr(mcs, Address(method,Method::method_counters_offset()));
279 testptr(mcs, mcs);
280 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
281 bind(has_counters);
282 }
283
284 // Load object from cpool->resolved_references(index)
285 void InterpreterMacroAssembler::load_resolved_reference_at_index(
286 Register result, Register index) {
287 assert_different_registers(result, index);
288 // convert from field index to resolved_references() index and from
289 // word index to byte offset. Since this is a java object, it can be compressed
290 Register tmp = index; // reuse
291 shll(tmp, LogBytesPerHeapOop);
292
293 get_constant_pool(result);
294 // load pointer for resolved_references[] objArray
295 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes()));
296 // JNIHandles::resolve(obj);
297 movptr(result, Address(result, 0));
298 // Add in the index
299 addptr(result, tmp);
300 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
301 }
302
303 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
304 // a subtype of super_klass. EAX holds the super_klass. Blows ECX.
305 // Resets EDI to locals. Register sub_klass cannot be any of the above.
306 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
307 assert( Rsub_klass != rax, "rax, holds superklass" );
308 assert( Rsub_klass != rcx, "used as a temp" );
309 assert( Rsub_klass != rdi, "used as a temp, restored from locals" );
310
311 // Profile the not-null value's klass.
312 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
313
314 // Do the check.
315 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
316
317 // Profile the failure of the check.
318 profile_typecheck_failed(rcx); // blows rcx
319 }
320
321 void InterpreterMacroAssembler::f2ieee() {
322 if (IEEEPrecision) {
323 fstp_s(Address(rsp, 0));
324 fld_s(Address(rsp, 0));
325 }
326 }
327
328
329 void InterpreterMacroAssembler::d2ieee() {
330 if (IEEEPrecision) {
331 fstp_d(Address(rsp, 0));
332 fld_d(Address(rsp, 0));
333 }
334 }
335
336 // Java Expression Stack
337
338 void InterpreterMacroAssembler::pop_ptr(Register r) {
339 pop(r);
340 }
341
342 void InterpreterMacroAssembler::pop_i(Register r) {
343 pop(r);
344 }
345
346 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
347 pop(lo);
348 pop(hi);
349 }
350
351 void InterpreterMacroAssembler::pop_f() {
352 fld_s(Address(rsp, 0));
353 addptr(rsp, 1 * wordSize);
354 }
355
356 void InterpreterMacroAssembler::pop_d() {
357 fld_d(Address(rsp, 0));
358 addptr(rsp, 2 * wordSize);
359 }
360
361
362 void InterpreterMacroAssembler::pop(TosState state) {
363 switch (state) {
364 case atos: pop_ptr(rax); break;
365 case btos: // fall through
366 case ztos: // fall through
367 case ctos: // fall through
368 case stos: // fall through
369 case itos: pop_i(rax); break;
370 case ltos: pop_l(rax, rdx); break;
371 case ftos: pop_f(); break;
372 case dtos: pop_d(); break;
373 case vtos: /* nothing to do */ break;
374 default : ShouldNotReachHere();
375 }
376 verify_oop(rax, state);
377 }
378
379 void InterpreterMacroAssembler::push_ptr(Register r) {
380 push(r);
381 }
382
383 void InterpreterMacroAssembler::push_i(Register r) {
384 push(r);
385 }
386
387 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
388 push(hi);
389 push(lo);
390 }
391
392 void InterpreterMacroAssembler::push_f() {
393 // Do not schedule for no AGI! Never write beyond rsp!
394 subptr(rsp, 1 * wordSize);
395 fstp_s(Address(rsp, 0));
396 }
397
398 void InterpreterMacroAssembler::push_d(Register r) {
399 // Do not schedule for no AGI! Never write beyond rsp!
400 subptr(rsp, 2 * wordSize);
401 fstp_d(Address(rsp, 0));
402 }
403
404
405 void InterpreterMacroAssembler::push(TosState state) {
406 verify_oop(rax, state);
407 switch (state) {
408 case atos: push_ptr(rax); break;
409 case btos: // fall through
410 case ztos: // fall through
411 case ctos: // fall through
412 case stos: // fall through
413 case itos: push_i(rax); break;
414 case ltos: push_l(rax, rdx); break;
415 case ftos: push_f(); break;
416 case dtos: push_d(rax); break;
417 case vtos: /* nothing to do */ break;
418 default : ShouldNotReachHere();
419 }
420 }
421
422
423 // Helpers for swap and dup
424 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
425 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
426 }
427
428 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
429 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
430 }
431
432 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
433 // set sender sp
434 lea(rsi, Address(rsp, wordSize));
435 // record last_sp
436 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
437 }
438
439
440 // Jump to from_interpreted entry of a call unless single stepping is possible
441 // in this thread in which case we must call the i2i entry
442 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
443 prepare_to_jump_from_interpreted();
444
445 if (JvmtiExport::can_post_interpreter_events()) {
446 Label run_compiled_code;
447 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
448 // compiled code in threads for which the event is enabled. Check here for
449 // interp_only_mode if these events CAN be enabled.
450 get_thread(temp);
451 // interp_only is an int, on little endian it is sufficient to test the byte only
452 // Is a cmpl faster?
453 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
454 jccb(Assembler::zero, run_compiled_code);
455 jmp(Address(method, Method::interpreter_entry_offset()));
456 bind(run_compiled_code);
457 }
458
459 jmp(Address(method, Method::from_interpreted_offset()));
460
461 }
462
463
464 // The following two routines provide a hook so that an implementation
465 // can schedule the dispatch in two parts. Intel does not do this.
466 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
467 // Nothing Intel-specific to be done here.
468 }
469
470 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
471 dispatch_next(state, step);
472 }
473
474 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
475 bool verifyoop) {
476 verify_FPU(1, state);
477 if (VerifyActivationFrameSize) {
478 Label L;
479 mov(rcx, rbp);
480 subptr(rcx, rsp);
481 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
482 cmpptr(rcx, min_frame_size);
483 jcc(Assembler::greaterEqual, L);
484 stop("broken stack frame");
485 bind(L);
486 }
487 if (verifyoop) verify_oop(rax, state);
488 Address index(noreg, rbx, Address::times_ptr);
489 ExternalAddress tbl((address)table);
490 ArrayAddress dispatch(tbl, index);
491 jump(dispatch);
492 }
493
494
495 void InterpreterMacroAssembler::dispatch_only(TosState state) {
496 dispatch_base(state, Interpreter::dispatch_table(state));
497 }
498
499
500 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
501 dispatch_base(state, Interpreter::normal_table(state));
502 }
503
504 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
505 dispatch_base(state, Interpreter::normal_table(state), false);
506 }
507
508
509 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
510 // load next bytecode (load before advancing rsi to prevent AGI)
511 load_unsigned_byte(rbx, Address(rsi, step));
512 // advance rsi
513 increment(rsi, step);
514 dispatch_base(state, Interpreter::dispatch_table(state));
515 }
516
517
518 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
519 // load current bytecode
520 load_unsigned_byte(rbx, Address(rsi, 0));
521 dispatch_base(state, table);
522 }
523
524 // remove activation
525 //
526 // Unlock the receiver if this is a synchronized method.
527 // Unlock any Java monitors from syncronized blocks.
528 // Remove the activation from the stack.
529 //
530 // If there are locked Java monitors
531 // If throw_monitor_exception
532 // throws IllegalMonitorStateException
533 // Else if install_monitor_exception
534 // installs IllegalMonitorStateException
535 // Else
536 // no error processing
537 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
538 bool throw_monitor_exception,
539 bool install_monitor_exception,
540 bool notify_jvmdi) {
541 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
542 // check if synchronized method
543 Label unlocked, unlock, no_unlock;
544
545 get_thread(rcx);
546 const Address do_not_unlock_if_synchronized(rcx,
547 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
548
549 movbool(rbx, do_not_unlock_if_synchronized);
550 mov(rdi,rbx);
551 movbool(do_not_unlock_if_synchronized, false); // reset the flag
552
553 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
554 movl(rcx, Address(rbx, Method::access_flags_offset()));
555
556 testl(rcx, JVM_ACC_SYNCHRONIZED);
557 jcc(Assembler::zero, unlocked);
558
559 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
560 // is set.
561 mov(rcx,rdi);
562 testbool(rcx);
563 jcc(Assembler::notZero, no_unlock);
564
565 // unlock monitor
566 push(state); // save result
567
568 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
569 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
570 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
571 lea (rdx, monitor); // address of first monitor
572
573 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
574 testptr(rax, rax);
575 jcc (Assembler::notZero, unlock);
576
577 pop(state);
578 if (throw_monitor_exception) {
579 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
580
581 // Entry already unlocked, need to throw exception
582 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
583 should_not_reach_here();
584 } else {
585 // Monitor already unlocked during a stack unroll.
586 // If requested, install an illegal_monitor_state_exception.
587 // Continue with stack unrolling.
588 if (install_monitor_exception) {
589 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
590 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
591 }
592 jmp(unlocked);
593 }
594
595 bind(unlock);
596 unlock_object(rdx);
597 pop(state);
598
599 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
600 bind(unlocked);
601
602 // rax, rdx: Might contain return value
603
604 // Check that all monitors are unlocked
605 {
606 Label loop, exception, entry, restart;
607 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
608 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
609 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
610
611 bind(restart);
612 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry
613 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block
614 jmp(entry);
615
616 // Entry already locked, need to throw exception
617 bind(exception);
618
619 if (throw_monitor_exception) {
620 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
621
622 // Throw exception
623 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
624 should_not_reach_here();
625 } else {
626 // Stack unrolling. Unlock object and install illegal_monitor_exception
627 // Unlock does not block, so don't have to worry about the frame
628
629 push(state);
630 mov(rdx, rcx);
631 unlock_object(rdx);
632 pop(state);
633
634 if (install_monitor_exception) {
635 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
636 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
637 }
638
639 jmp(restart);
640 }
641
642 bind(loop);
643 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used
644 jcc(Assembler::notEqual, exception);
645
646 addptr(rcx, entry_size); // otherwise advance to next entry
647 bind(entry);
648 cmpptr(rcx, rbx); // check if bottom reached
649 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
650 }
651
652 bind(no_unlock);
653
654 // jvmti support
655 if (notify_jvmdi) {
656 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
657 } else {
658 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
659 }
660
661 // remove activation
662 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
663 leave(); // remove frame anchor
664 pop(ret_addr); // get return address
665 mov(rsp, rbx); // set sp to sender sp
666 if (UseSSE) {
667 // float and double are returned in xmm register in SSE-mode
668 if (state == ftos && UseSSE >= 1) {
669 subptr(rsp, wordSize);
670 fstp_s(Address(rsp, 0));
671 movflt(xmm0, Address(rsp, 0));
672 addptr(rsp, wordSize);
673 } else if (state == dtos && UseSSE >= 2) {
674 subptr(rsp, 2*wordSize);
675 fstp_d(Address(rsp, 0));
676 movdbl(xmm0, Address(rsp, 0));
677 addptr(rsp, 2*wordSize);
678 }
679 }
680 }
681
682 #endif /* !CC_INTERP */
683
684
685 // Lock object
686 //
687 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
688 // be initialized with object to lock
689 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
690 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
691
692 if (UseHeavyMonitors) {
693 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
694 } else {
695
696 Label done;
697
698 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
699 const Register obj_reg = rcx; // Will contain the oop
700
701 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
702 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
703 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
704
705 Label slow_case;
706
707 // Load object pointer into obj_reg %rcx
708 movptr(obj_reg, Address(lock_reg, obj_offset));
709
710 if (UseBiasedLocking) {
711 // Note: we use noreg for the temporary register since it's hard
712 // to come up with a free register on all incoming code paths
713 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
714 }
715
716 // Load immediate 1 into swap_reg %rax,
717 movptr(swap_reg, (int32_t)1);
718
719 // Load (object->mark() | 1) into swap_reg %rax,
720 orptr(swap_reg, Address(obj_reg, 0));
721
722 // Save (object->mark() | 1) into BasicLock's displaced header
723 movptr(Address(lock_reg, mark_offset), swap_reg);
724
725 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
726 if (os::is_MP()) {
727 lock();
728 }
729 cmpxchgptr(lock_reg, Address(obj_reg, 0));
730 if (PrintBiasedLockingStatistics) {
731 cond_inc32(Assembler::zero,
732 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
733 }
734 jcc(Assembler::zero, done);
735
736 // Test if the oopMark is an obvious stack pointer, i.e.,
737 // 1) (mark & 3) == 0, and
738 // 2) rsp <= mark < mark + os::pagesize()
739 //
740 // These 3 tests can be done by evaluating the following
741 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
742 // assuming both stack pointer and pagesize have their
743 // least significant 2 bits clear.
744 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
745 subptr(swap_reg, rsp);
746 andptr(swap_reg, 3 - os::vm_page_size());
747
748 // Save the test result, for recursive case, the result is zero
749 movptr(Address(lock_reg, mark_offset), swap_reg);
750
751 if (PrintBiasedLockingStatistics) {
752 cond_inc32(Assembler::zero,
753 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
754 }
755 jcc(Assembler::zero, done);
756
757 bind(slow_case);
758
759 // Call the runtime routine for slow case
760 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
761
762 bind(done);
763 }
764 }
765
766
767 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
768 //
769 // Argument: rdx : Points to BasicObjectLock structure for lock
770 // Throw an IllegalMonitorException if object is not locked by current thread
771 //
772 // Uses: rax, rbx, rcx, rdx
773 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
774 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
775
776 if (UseHeavyMonitors) {
777 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
778 } else {
779 Label done;
780
781 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
782 const Register header_reg = rbx; // Will contain the old oopMark
783 const Register obj_reg = rcx; // Will contain the oop
784
785 save_bcp(); // Save in case of exception
786
787 // Convert from BasicObjectLock structure to object and BasicLock structure
788 // Store the BasicLock address into %rax,
789 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
790
791 // Load oop into obj_reg(%rcx)
792 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
793
794 // Free entry
795 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
796
797 if (UseBiasedLocking) {
798 biased_locking_exit(obj_reg, header_reg, done);
799 }
800
801 // Load the old header from BasicLock structure
802 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
803
804 // Test for recursion
805 testptr(header_reg, header_reg);
806
807 // zero for recursive case
808 jcc(Assembler::zero, done);
809
810 // Atomic swap back the old header
811 if (os::is_MP()) lock();
812 cmpxchgptr(header_reg, Address(obj_reg, 0));
813
814 // zero for recursive case
815 jcc(Assembler::zero, done);
816
817 // Call the runtime routine for slow case.
818 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
819 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
820
821 bind(done);
822
823 restore_bcp();
824 }
825 }
826
827
828 #ifndef CC_INTERP
829
830 // Test ImethodDataPtr. If it is null, continue at the specified label
831 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
832 assert(ProfileInterpreter, "must be profiling interpreter");
833 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
834 testptr(mdp, mdp);
835 jcc(Assembler::zero, zero_continue);
836 }
837
838
839 // Set the method data pointer for the current bcp.
840 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
841 assert(ProfileInterpreter, "must be profiling interpreter");
842 Label set_mdp;
843 push(rax);
844 push(rbx);
845
846 get_method(rbx);
847 // Test MDO to avoid the call if it is NULL.
848 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
849 testptr(rax, rax);
850 jcc(Assembler::zero, set_mdp);
851 // rbx,: method
852 // rsi: bcp
853 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
854 // rax,: mdi
855 // mdo is guaranteed to be non-zero here, we checked for it before the call.
856 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
857 addptr(rbx, in_bytes(MethodData::data_offset()));
858 addptr(rax, rbx);
859 bind(set_mdp);
860 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
861 pop(rbx);
862 pop(rax);
863 }
864
865 void InterpreterMacroAssembler::verify_method_data_pointer() {
866 assert(ProfileInterpreter, "must be profiling interpreter");
867 #ifdef ASSERT
868 Label verify_continue;
869 push(rax);
870 push(rbx);
871 push(rcx);
872 push(rdx);
873 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
874 get_method(rbx);
875
876 // If the mdp is valid, it will point to a DataLayout header which is
877 // consistent with the bcp. The converse is highly probable also.
878 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
879 addptr(rdx, Address(rbx, Method::const_offset()));
880 lea(rdx, Address(rdx, ConstMethod::codes_offset()));
881 cmpptr(rdx, rsi);
882 jcc(Assembler::equal, verify_continue);
883 // rbx,: method
884 // rsi: bcp
885 // rcx: mdp
886 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
887 bind(verify_continue);
888 pop(rdx);
889 pop(rcx);
890 pop(rbx);
891 pop(rax);
892 #endif // ASSERT
893 }
894
895
896 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
897 // %%% this seems to be used to store counter data which is surely 32bits
898 // however 64bit side stores 64 bits which seems wrong
899 assert(ProfileInterpreter, "must be profiling interpreter");
900 Address data(mdp_in, constant);
901 movptr(data, value);
902 }
903
904
905 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
906 int constant,
907 bool decrement) {
908 // Counter address
909 Address data(mdp_in, constant);
910
911 increment_mdp_data_at(data, decrement);
912 }
913
914
915 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
916 bool decrement) {
917
918 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
919 assert(ProfileInterpreter, "must be profiling interpreter");
920
921 // %%% 64bit treats this as 64 bit which seems unlikely
922 if (decrement) {
923 // Decrement the register. Set condition codes.
924 addl(data, -DataLayout::counter_increment);
925 // If the decrement causes the counter to overflow, stay negative
926 Label L;
927 jcc(Assembler::negative, L);
928 addl(data, DataLayout::counter_increment);
929 bind(L);
930 } else {
931 assert(DataLayout::counter_increment == 1,
932 "flow-free idiom only works with 1");
933 // Increment the register. Set carry flag.
934 addl(data, DataLayout::counter_increment);
935 // If the increment causes the counter to overflow, pull back by 1.
936 sbbl(data, 0);
937 }
938 }
939
940
941 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
942 Register reg,
943 int constant,
944 bool decrement) {
945 Address data(mdp_in, reg, Address::times_1, constant);
946
947 increment_mdp_data_at(data, decrement);
948 }
949
950
951 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
952 assert(ProfileInterpreter, "must be profiling interpreter");
953 int header_offset = in_bytes(DataLayout::header_offset());
954 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
955 // Set the flag
956 orl(Address(mdp_in, header_offset), header_bits);
957 }
958
959
960
961 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
962 int offset,
963 Register value,
964 Register test_value_out,
965 Label& not_equal_continue) {
966 assert(ProfileInterpreter, "must be profiling interpreter");
967 if (test_value_out == noreg) {
968 cmpptr(value, Address(mdp_in, offset));
969 } else {
970 // Put the test value into a register, so caller can use it:
971 movptr(test_value_out, Address(mdp_in, offset));
972 cmpptr(test_value_out, value);
973 }
974 jcc(Assembler::notEqual, not_equal_continue);
975 }
976
977
978 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
979 assert(ProfileInterpreter, "must be profiling interpreter");
980 Address disp_address(mdp_in, offset_of_disp);
981 addptr(mdp_in,disp_address);
982 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
983 }
984
985
986 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
987 assert(ProfileInterpreter, "must be profiling interpreter");
988 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
989 addptr(mdp_in, disp_address);
990 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
991 }
992
993
994 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
995 assert(ProfileInterpreter, "must be profiling interpreter");
996 addptr(mdp_in, constant);
997 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
998 }
999
1000
1001 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1002 assert(ProfileInterpreter, "must be profiling interpreter");
1003 push(return_bci); // save/restore across call_VM
1004 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
1005 pop(return_bci);
1006 }
1007
1008
1009 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
1010 if (ProfileInterpreter) {
1011 Label profile_continue;
1012
1013 // If no method data exists, go to profile_continue.
1014 // Otherwise, assign to mdp
1015 test_method_data_pointer(mdp, profile_continue);
1016
1017 // We are taking a branch. Increment the taken count.
1018 // We inline increment_mdp_data_at to return bumped_count in a register
1019 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1020 Address data(mdp, in_bytes(JumpData::taken_offset()));
1021
1022 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
1023 movl(bumped_count,data);
1024 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
1025 addl(bumped_count, DataLayout::counter_increment);
1026 sbbl(bumped_count, 0);
1027 movl(data,bumped_count); // Store back out
1028
1029 // The method data pointer needs to be updated to reflect the new target.
1030 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1031 bind (profile_continue);
1032 }
1033 }
1034
1035
1036 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1037 if (ProfileInterpreter) {
1038 Label profile_continue;
1039
1040 // If no method data exists, go to profile_continue.
1041 test_method_data_pointer(mdp, profile_continue);
1042
1043 // We are taking a branch. Increment the not taken count.
1044 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1045
1046 // The method data pointer needs to be updated to correspond to the next bytecode
1047 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1048 bind (profile_continue);
1049 }
1050 }
1051
1052 void InterpreterMacroAssembler::profile_call(Register mdp) {
1053 if (ProfileInterpreter) {
1054 Label profile_continue;
1055
1056 // If no method data exists, go to profile_continue.
1057 test_method_data_pointer(mdp, profile_continue);
1058
1059 // We are making a call. Increment the count.
1060 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1061
1062 // The method data pointer needs to be updated to reflect the new target.
1063 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1064 bind (profile_continue);
1065 }
1066 }
1067
1068
1069 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1070 if (ProfileInterpreter) {
1071 Label profile_continue;
1072
1073 // If no method data exists, go to profile_continue.
1074 test_method_data_pointer(mdp, profile_continue);
1075
1076 // We are making a call. Increment the count.
1077 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1078
1079 // The method data pointer needs to be updated to reflect the new target.
1080 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1081 bind (profile_continue);
1082 }
1083 }
1084
1085
1086 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp,
1087 Register reg2,
1088 bool receiver_can_be_null) {
1089 if (ProfileInterpreter) {
1090 Label profile_continue;
1091
1092 // If no method data exists, go to profile_continue.
1093 test_method_data_pointer(mdp, profile_continue);
1094
1095 Label skip_receiver_profile;
1096 if (receiver_can_be_null) {
1097 Label not_null;
1098 testptr(receiver, receiver);
1099 jccb(Assembler::notZero, not_null);
1100 // We are making a call. Increment the count for null receiver.
1101 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1102 jmp(skip_receiver_profile);
1103 bind(not_null);
1104 }
1105
1106 // Record the receiver type.
1107 record_klass_in_profile(receiver, mdp, reg2, true);
1108 bind(skip_receiver_profile);
1109
1110 // The method data pointer needs to be updated to reflect the new target.
1111 update_mdp_by_constant(mdp,
1112 in_bytes(VirtualCallData::
1113 virtual_call_data_size()));
1114 bind(profile_continue);
1115 }
1116 }
1117
1118
1119 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1120 Register receiver, Register mdp,
1121 Register reg2, int start_row,
1122 Label& done, bool is_virtual_call) {
1123 if (TypeProfileWidth == 0) {
1124 if (is_virtual_call) {
1125 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1126 }
1127 return;
1128 }
1129
1130 int last_row = VirtualCallData::row_limit() - 1;
1131 assert(start_row <= last_row, "must be work left to do");
1132 // Test this row for both the receiver and for null.
1133 // Take any of three different outcomes:
1134 // 1. found receiver => increment count and goto done
1135 // 2. found null => keep looking for case 1, maybe allocate this cell
1136 // 3. found something else => keep looking for cases 1 and 2
1137 // Case 3 is handled by a recursive call.
1138 for (int row = start_row; row <= last_row; row++) {
1139 Label next_test;
1140 bool test_for_null_also = (row == start_row);
1141
1142 // See if the receiver is receiver[n].
1143 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1144 test_mdp_data_at(mdp, recvr_offset, receiver,
1145 (test_for_null_also ? reg2 : noreg),
1146 next_test);
1147 // (Reg2 now contains the receiver from the CallData.)
1148
1149 // The receiver is receiver[n]. Increment count[n].
1150 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1151 increment_mdp_data_at(mdp, count_offset);
1152 jmp(done);
1153 bind(next_test);
1154
1155 if (row == start_row) {
1156 Label found_null;
1157 // Failed the equality check on receiver[n]... Test for null.
1158 testptr(reg2, reg2);
1159 if (start_row == last_row) {
1160 // The only thing left to do is handle the null case.
1161 if (is_virtual_call) {
1162 jccb(Assembler::zero, found_null);
1163 // Receiver did not match any saved receiver and there is no empty row for it.
1164 // Increment total counter to indicate polymorphic case.
1165 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1166 jmp(done);
1167 bind(found_null);
1168 } else {
1169 jcc(Assembler::notZero, done);
1170 }
1171 break;
1172 }
1173 // Since null is rare, make it be the branch-taken case.
1174 jcc(Assembler::zero, found_null);
1175
1176 // Put all the "Case 3" tests here.
1177 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1178
1179 // Found a null. Keep searching for a matching receiver,
1180 // but remember that this is an empty (unused) slot.
1181 bind(found_null);
1182 }
1183 }
1184
1185 // In the fall-through case, we found no matching receiver, but we
1186 // observed the receiver[start_row] is NULL.
1187
1188 // Fill in the receiver field and increment the count.
1189 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1190 set_mdp_data_at(mdp, recvr_offset, receiver);
1191 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1192 movptr(reg2, (intptr_t)DataLayout::counter_increment);
1193 set_mdp_data_at(mdp, count_offset, reg2);
1194 if (start_row > 0) {
1195 jmp(done);
1196 }
1197 }
1198
1199 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1200 Register mdp, Register reg2,
1201 bool is_virtual_call) {
1202 assert(ProfileInterpreter, "must be profiling");
1203 Label done;
1204
1205 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1206
1207 bind (done);
1208 }
1209
1210 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
1211 if (ProfileInterpreter) {
1212 Label profile_continue;
1213 uint row;
1214
1215 // If no method data exists, go to profile_continue.
1216 test_method_data_pointer(mdp, profile_continue);
1217
1218 // Update the total ret count.
1219 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1220
1221 for (row = 0; row < RetData::row_limit(); row++) {
1222 Label next_test;
1223
1224 // See if return_bci is equal to bci[n]:
1225 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
1226 noreg, next_test);
1227
1228 // return_bci is equal to bci[n]. Increment the count.
1229 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1230
1231 // The method data pointer needs to be updated to reflect the new target.
1232 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
1233 jmp(profile_continue);
1234 bind(next_test);
1235 }
1236
1237 update_mdp_for_ret(return_bci);
1238
1239 bind (profile_continue);
1240 }
1241 }
1242
1243
1244 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1245 if (ProfileInterpreter) {
1246 Label profile_continue;
1247
1248 // If no method data exists, go to profile_continue.
1249 test_method_data_pointer(mdp, profile_continue);
1250
1251 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1252
1253 // The method data pointer needs to be updated.
1254 int mdp_delta = in_bytes(BitData::bit_data_size());
1255 if (TypeProfileCasts) {
1256 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1257 }
1258 update_mdp_by_constant(mdp, mdp_delta);
1259
1260 bind (profile_continue);
1261 }
1262 }
1263
1264
1265 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1266 if (ProfileInterpreter && TypeProfileCasts) {
1267 Label profile_continue;
1268
1269 // If no method data exists, go to profile_continue.
1270 test_method_data_pointer(mdp, profile_continue);
1271
1272 int count_offset = in_bytes(CounterData::count_offset());
1273 // Back up the address, since we have already bumped the mdp.
1274 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1275
1276 // *Decrement* the counter. We expect to see zero or small negatives.
1277 increment_mdp_data_at(mdp, count_offset, true);
1278
1279 bind (profile_continue);
1280 }
1281 }
1282
1283
1284 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
1285 {
1286 if (ProfileInterpreter) {
1287 Label profile_continue;
1288
1289 // If no method data exists, go to profile_continue.
1290 test_method_data_pointer(mdp, profile_continue);
1291
1292 // The method data pointer needs to be updated.
1293 int mdp_delta = in_bytes(BitData::bit_data_size());
1294 if (TypeProfileCasts) {
1295 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1296
1297 // Record the object type.
1298 record_klass_in_profile(klass, mdp, reg2, false);
1299 assert(reg2 == rdi, "we know how to fix this blown reg");
1300 restore_locals(); // Restore EDI
1301 }
1302 update_mdp_by_constant(mdp, mdp_delta);
1303
1304 bind(profile_continue);
1305 }
1306 }
1307
1308
1309 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1310 if (ProfileInterpreter) {
1311 Label profile_continue;
1312
1313 // If no method data exists, go to profile_continue.
1314 test_method_data_pointer(mdp, profile_continue);
1315
1316 // Update the default case count
1317 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1318
1319 // The method data pointer needs to be updated.
1320 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
1321
1322 bind (profile_continue);
1323 }
1324 }
1325
1326
1327 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
1328 if (ProfileInterpreter) {
1329 Label profile_continue;
1330
1331 // If no method data exists, go to profile_continue.
1332 test_method_data_pointer(mdp, profile_continue);
1333
1334 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1335 movptr(reg2, (intptr_t)in_bytes(MultiBranchData::per_case_size()));
1336 // index is positive and so should have correct value if this code were
1337 // used on 64bits
1338 imulptr(index, reg2);
1339 addptr(index, in_bytes(MultiBranchData::case_array_offset()));
1340
1341 // Update the case count
1342 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1343
1344 // The method data pointer needs to be updated.
1345 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
1346
1347 bind (profile_continue);
1348 }
1349 }
1350
1351 #endif // !CC_INTERP
1352
1353
1354
1355 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1356 if (state == atos) MacroAssembler::verify_oop(reg);
1357 }
1358
1359
1360 #ifndef CC_INTERP
1361 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1362 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1363 }
1364
1365 #endif /* CC_INTERP */
1366
1367
1368 void InterpreterMacroAssembler::notify_method_entry() {
1369 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1370 // track stack depth. If it is possible to enter interp_only_mode we add
1371 // the code to check if the event should be sent.
1372 if (JvmtiExport::can_post_interpreter_events()) {
1373 Label L;
1374 get_thread(rcx);
1375 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1376 testl(rcx,rcx);
1377 jcc(Assembler::zero, L);
1378 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
1379 bind(L);
1380 }
1381
1382 {
1383 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1384 get_thread(rcx);
1385 get_method(rbx);
1386 call_VM_leaf(
1387 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
1388 }
1389
1390 // RedefineClasses() tracing support for obsolete method entry
1391 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1392 get_thread(rcx);
1393 get_method(rbx);
1394 call_VM_leaf(
1395 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1396 rcx, rbx);
1397 }
1398 }
1399
1400
1401 void InterpreterMacroAssembler::notify_method_exit(
1402 TosState state, NotifyMethodExitMode mode) {
1403 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1404 // track stack depth. If it is possible to enter interp_only_mode we add
1405 // the code to check if the event should be sent.
1406 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1407 Label L;
1408 // Note: frame::interpreter_frame_result has a dependency on how the
1409 // method result is saved across the call to post_method_exit. If this
1410 // is changed then the interpreter_frame_result implementation will
1411 // need to be updated too.
1412
1413 // For c++ interpreter the result is always stored at a known location in the frame
1414 // template interpreter will leave it on the top of the stack.
1415 NOT_CC_INTERP(push(state);)
1416 get_thread(rcx);
1417 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1418 testl(rcx,rcx);
1419 jcc(Assembler::zero, L);
1420 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1421 bind(L);
1422 NOT_CC_INTERP(pop(state);)
1423 }
1424
1425 {
1426 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1427 NOT_CC_INTERP(push(state));
1428 get_thread(rbx);
1429 get_method(rcx);
1430 call_VM_leaf(
1431 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1432 rbx, rcx);
1433 NOT_CC_INTERP(pop(state));
1434 }
1435 }
1436
1437 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1438 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1439 int increment, int mask,
1440 Register scratch, bool preloaded,
1441 Condition cond, Label* where) {
1442 if (!preloaded) {
1443 movl(scratch, counter_addr);
1444 }
1445 incrementl(scratch, increment);
1446 movl(counter_addr, scratch);
1447 andl(scratch, mask);
1448 if (where != NULL) {
1449 jcc(cond, *where);
1450 }
1451 }