1 /*
2 * Copyright (c) 1997, 2025, 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 "compiler/compiler_globals.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markWord.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "oops/resolvedFieldEntry.hpp"
35 #include "oops/resolvedIndyEntry.hpp"
36 #include "oops/resolvedMethodEntry.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/basicLock.hpp"
40 #include "runtime/frame.inline.hpp"
41 #include "runtime/javaThread.hpp"
42 #include "runtime/safepointMechanism.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "utilities/powerOfTwo.hpp"
45
46 // Implementation of InterpreterMacroAssembler
47
48 void InterpreterMacroAssembler::jump_to_entry(address entry) {
49 assert(entry, "Entry must have been generated by now");
50 jump(RuntimeAddress(entry));
51 }
52
53 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
54 Label update, next, none;
55
56 assert_different_registers(obj, rscratch1, mdo_addr.base(), mdo_addr.index());
57
58 interp_verify_oop(obj, atos);
59
60 testptr(obj, obj);
61 jccb(Assembler::notZero, update);
62 testptr(mdo_addr, TypeEntries::null_seen);
63 jccb(Assembler::notZero, next); // null already seen. Nothing to do anymore.
64 // atomic update to prevent overwriting Klass* with 0
65 lock();
66 orptr(mdo_addr, TypeEntries::null_seen);
67 jmpb(next);
68
69 bind(update);
70 load_klass(obj, obj, rscratch1);
71 mov(rscratch1, obj);
72
73 xorptr(obj, mdo_addr);
74 testptr(obj, TypeEntries::type_klass_mask);
75 jccb(Assembler::zero, next); // klass seen before, nothing to
76 // do. The unknown bit may have been
77 // set already but no need to check.
78
79 testptr(obj, TypeEntries::type_unknown);
80 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
81
82 cmpptr(mdo_addr, 0);
83 jccb(Assembler::equal, none);
84 cmpptr(mdo_addr, TypeEntries::null_seen);
85 jccb(Assembler::equal, none);
86
87 // There is a chance that the checks above (re-reading profiling
88 // data from memory) fail if another thread has just set the
89 // profiling to this obj's klass
90 mov(obj, rscratch1);
91 xorptr(obj, mdo_addr);
92 testptr(obj, TypeEntries::type_klass_mask);
93 jccb(Assembler::zero, next);
94
95 // different than before. Cannot keep accurate profile.
96 orptr(mdo_addr, TypeEntries::type_unknown);
97 jmpb(next);
98
99 bind(none);
100 // first time here. Set profile type.
101 movptr(mdo_addr, obj);
102 #ifdef ASSERT
103 andptr(obj, TypeEntries::type_klass_mask);
104 verify_klass_ptr(obj);
105 #endif
106
107 bind(next);
108 }
109
110 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
111 if (!ProfileInterpreter) {
112 return;
113 }
114
115 if (MethodData::profile_arguments() || MethodData::profile_return()) {
116 Label profile_continue;
117
118 test_method_data_pointer(mdp, profile_continue);
119
120 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
121
122 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
123 jcc(Assembler::notEqual, profile_continue);
124
125 if (MethodData::profile_arguments()) {
126 Label done;
127 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
128 addptr(mdp, off_to_args);
129
130 for (int i = 0; i < TypeProfileArgsLimit; i++) {
131 if (i > 0 || MethodData::profile_return()) {
132 // If return value type is profiled we may have no argument to profile
133 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
134 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
135 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
136 jcc(Assembler::less, done);
137 }
138 movptr(tmp, Address(callee, Method::const_offset()));
139 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
140 // stack offset o (zero based) from the start of the argument
141 // list, for n arguments translates into offset n - o - 1 from
142 // the end of the argument list
143 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
144 subl(tmp, 1);
145 Address arg_addr = argument_address(tmp);
146 movptr(tmp, arg_addr);
147
148 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
149 profile_obj_type(tmp, mdo_arg_addr);
150
151 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
152 addptr(mdp, to_add);
153 off_to_args += to_add;
154 }
155
156 if (MethodData::profile_return()) {
157 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
158 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
159 }
160
161 bind(done);
162
163 if (MethodData::profile_return()) {
164 // We're right after the type profile for the last
165 // argument. tmp is the number of cells left in the
166 // CallTypeData/VirtualCallTypeData to reach its end. Non null
167 // if there's a return to profile.
168 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
169 shll(tmp, log2i_exact((int)DataLayout::cell_size));
170 addptr(mdp, tmp);
171 }
172 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
173 } else {
174 assert(MethodData::profile_return(), "either profile call args or call ret");
175 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
176 }
177
178 // mdp points right after the end of the
179 // CallTypeData/VirtualCallTypeData, right after the cells for the
180 // return value type if there's one
181
182 bind(profile_continue);
183 }
184 }
185
186 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
187 assert_different_registers(mdp, ret, tmp, _bcp_register);
188 if (ProfileInterpreter && MethodData::profile_return()) {
189 Label profile_continue;
190
191 test_method_data_pointer(mdp, profile_continue);
192
193 if (MethodData::profile_return_jsr292_only()) {
194 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
195
196 // If we don't profile all invoke bytecodes we must make sure
197 // it's a bytecode we indeed profile. We can't go back to the
198 // beginning of the ProfileData we intend to update to check its
199 // type because we're right after it and we don't known its
200 // length
201 Label do_profile;
202 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
203 jcc(Assembler::equal, do_profile);
204 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
205 jcc(Assembler::equal, do_profile);
206 get_method(tmp);
207 cmpw(Address(tmp, Method::intrinsic_id_offset()), static_cast<int>(vmIntrinsics::_compiledLambdaForm));
208 jcc(Assembler::notEqual, profile_continue);
209
210 bind(do_profile);
211 }
212
213 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
214 mov(tmp, ret);
215 profile_obj_type(tmp, mdo_ret_addr);
216
217 bind(profile_continue);
218 }
219 }
220
221 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
222 if (ProfileInterpreter && MethodData::profile_parameters()) {
223 Label profile_continue;
224
225 test_method_data_pointer(mdp, profile_continue);
226
227 // Load the offset of the area within the MDO used for
228 // parameters. If it's negative we're not profiling any parameters
229 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
230 testl(tmp1, tmp1);
231 jcc(Assembler::negative, profile_continue);
232
233 // Compute a pointer to the area for parameters from the offset
234 // and move the pointer to the slot for the last
235 // parameters. Collect profiling from last parameter down.
236 // mdo start + parameters offset + array length - 1
237 addptr(mdp, tmp1);
238 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
239 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
240
241 Label loop;
242 bind(loop);
243
244 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
245 int type_base = in_bytes(ParametersTypeData::type_offset(0));
246 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
247 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
248 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
249
250 // load offset on the stack from the slot for this parameter
251 movptr(tmp2, arg_off);
252 negptr(tmp2);
253 // read the parameter from the local area
254 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
255
256 // profile the parameter
257 profile_obj_type(tmp2, arg_type);
258
259 // go to next parameter
260 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
261 jcc(Assembler::positive, loop);
262
263 bind(profile_continue);
264 }
265 }
266
267 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
268 int number_of_arguments) {
269 // interpreter specific
270 //
271 // Note: No need to save/restore bcp & locals registers
272 // since these are callee saved registers and no blocking/
273 // GC can happen in leaf calls.
274 // Further Note: DO NOT save/restore bcp/locals. If a caller has
275 // already saved them so that it can use rsi/rdi as temporaries
276 // then a save/restore here will DESTROY the copy the caller
277 // saved! There used to be a save_bcp() that only happened in
278 // the ASSERT path (no restore_bcp). Which caused bizarre failures
279 // when jvm built with ASSERTs.
280 #ifdef ASSERT
281 {
282 Label L;
283 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
284 jcc(Assembler::equal, L);
285 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
286 " last_sp != null");
287 bind(L);
288 }
289 #endif
290 // super call
291 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
292 // interpreter specific
293 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
294 // but since they may not have been saved (and we don't want to
295 // save them here (see note above) the assert is invalid.
296 }
297
298 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
299 Register last_java_sp,
300 address entry_point,
301 int number_of_arguments,
302 bool check_exceptions) {
303 // interpreter specific
304 //
305 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
306 // really make a difference for these runtime calls, since they are
307 // slow anyway. Btw., bcp must be saved/restored since it may change
308 // due to GC.
309 save_bcp();
310 #ifdef ASSERT
311 {
312 Label L;
313 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
314 jcc(Assembler::equal, L);
315 stop("InterpreterMacroAssembler::call_VM_base:"
316 " last_sp isn't null");
317 bind(L);
318 }
319 #endif /* ASSERT */
320 // super call
321 MacroAssembler::call_VM_base(oop_result, last_java_sp,
322 entry_point, number_of_arguments,
323 check_exceptions);
324 // interpreter specific
325 restore_bcp();
326 restore_locals();
327 }
328
329 void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result,
330 address entry_point,
331 Register arg_1) {
332 assert(arg_1 == c_rarg1, "");
333 Label resume_pc, not_preempted;
334
335 #ifdef ASSERT
336 {
337 Label L;
338 cmpptr(Address(r15_thread, JavaThread::preempt_alternate_return_offset()), NULL_WORD);
339 jcc(Assembler::equal, L);
340 stop("Should not have alternate return address set");
341 bind(L);
342 }
343 #endif /* ASSERT */
344
345 // Force freeze slow path.
346 push_cont_fastpath();
347
348 // Make VM call. In case of preemption set last_pc to the one we want to resume to.
349 // Note: call_VM_helper requires last_Java_pc for anchor to be at the top of the stack.
350 lea(rscratch1, resume_pc);
351 push(rscratch1);
352 MacroAssembler::call_VM_helper(oop_result, entry_point, 1, false /*check_exceptions*/);
353 pop(rscratch1);
354
355 pop_cont_fastpath();
356
357 // Check if preempted.
358 movptr(rscratch1, Address(r15_thread, JavaThread::preempt_alternate_return_offset()));
359 cmpptr(rscratch1, NULL_WORD);
360 jccb(Assembler::zero, not_preempted);
361 movptr(Address(r15_thread, JavaThread::preempt_alternate_return_offset()), NULL_WORD);
362 jmp(rscratch1);
363
364 // In case of preemption, this is where we will resume once we finally acquire the monitor.
365 bind(resume_pc);
366 restore_after_resume(false /* is_native */);
367
368 bind(not_preempted);
369 }
370
371 void InterpreterMacroAssembler::restore_after_resume(bool is_native) {
372 lea(rscratch1, ExternalAddress(Interpreter::cont_resume_interpreter_adapter()));
373 call(rscratch1);
374 if (is_native) {
375 // On resume we need to set up stack as expected.
376 push(dtos);
377 push(ltos);
378 }
379 }
380
381 void InterpreterMacroAssembler::check_and_handle_popframe() {
382 if (JvmtiExport::can_pop_frame()) {
383 Label L;
384 // Initiate popframe handling only if it is not already being
385 // processed. If the flag has the popframe_processing bit set, it
386 // means that this code is called *during* popframe handling - we
387 // don't want to reenter.
388 // This method is only called just after the call into the vm in
389 // call_VM_base, so the arg registers are available.
390 Register pop_cond = c_rarg0;
391 movl(pop_cond, Address(r15_thread, JavaThread::popframe_condition_offset()));
392 testl(pop_cond, JavaThread::popframe_pending_bit);
393 jcc(Assembler::zero, L);
394 testl(pop_cond, JavaThread::popframe_processing_bit);
395 jcc(Assembler::notZero, L);
396 // Call Interpreter::remove_activation_preserving_args_entry() to get the
397 // address of the same-named entrypoint in the generated interpreter code.
398 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
399 jmp(rax);
400 bind(L);
401 }
402 }
403
404 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
405 movptr(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
406 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
407 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
408 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
409
410 switch (state) {
411 case atos: movptr(rax, oop_addr);
412 movptr(oop_addr, NULL_WORD);
413 interp_verify_oop(rax, state); break;
414 case ltos: movptr(rax, val_addr); break;
415 case btos: // fall through
416 case ztos: // fall through
417 case ctos: // fall through
418 case stos: // fall through
419 case itos: movl(rax, val_addr); break;
420 case ftos: load_float(val_addr); break;
421 case dtos: load_double(val_addr); break;
422 case vtos: /* nothing to do */ break;
423 default : ShouldNotReachHere();
424 }
425
426 // Clean up tos value in the thread object
427 movl(tos_addr, ilgl);
428 movptr(val_addr, NULL_WORD);
429 }
430
431
432 void InterpreterMacroAssembler::check_and_handle_earlyret() {
433 if (JvmtiExport::can_force_early_return()) {
434 Label L;
435 Register tmp = c_rarg0;
436 Register rthread = r15_thread;
437
438 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
439 testptr(tmp, tmp);
440 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == nullptr) exit;
441
442 // Initiate earlyret handling only if it is not already being processed.
443 // If the flag has the earlyret_processing bit set, it means that this code
444 // is called *during* earlyret handling - we don't want to reenter.
445 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
446 cmpl(tmp, JvmtiThreadState::earlyret_pending);
447 jcc(Assembler::notEqual, L);
448
449 // Call Interpreter::remove_activation_early_entry() to get the address of the
450 // same-named entrypoint in the generated interpreter code.
451 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
452 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
453 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
454 jmp(rax);
455 bind(L);
456 }
457 }
458
459 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
460 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
461 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
462 bswapl(reg);
463 shrl(reg, 16);
464 }
465
466 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
467 int bcp_offset,
468 size_t index_size) {
469 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
470 if (index_size == sizeof(u2)) {
471 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
472 } else if (index_size == sizeof(u4)) {
473 movl(index, Address(_bcp_register, bcp_offset));
474 } else if (index_size == sizeof(u1)) {
475 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
476 } else {
477 ShouldNotReachHere();
478 }
479 }
480
481 // Load object from cpool->resolved_references(index)
482 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result,
483 Register index,
484 Register tmp) {
485 assert_different_registers(result, index);
486
487 get_constant_pool(result);
488 // load pointer for resolved_references[] objArray
489 movptr(result, Address(result, ConstantPool::cache_offset()));
490 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset()));
491 resolve_oop_handle(result, tmp);
492 load_heap_oop(result, Address(result, index,
493 UseCompressedOops ? Address::times_4 : Address::times_ptr,
494 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
495 }
496
497 // load cpool->resolved_klass_at(index)
498 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass,
499 Register cpool,
500 Register index) {
501 assert_different_registers(cpool, index);
502
503 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
504 Register resolved_klasses = cpool;
505 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset()));
506 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
507 }
508
509 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
510 // subtype of super_klass.
511 //
512 // Args:
513 // rax: superklass
514 // Rsub_klass: subklass
515 //
516 // Kills:
517 // rcx, rdi
518 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
519 Label& ok_is_subtype) {
520 assert(Rsub_klass != rax, "rax holds superklass");
521 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
522 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
523 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
524 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
525
526 // Profile the not-null value's klass.
527 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
528
529 // Do the check.
530 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
531 }
532
533
534 // Java Expression Stack
535
536 void InterpreterMacroAssembler::pop_ptr(Register r) {
537 pop(r);
538 }
539
540 void InterpreterMacroAssembler::push_ptr(Register r) {
541 push(r);
542 }
543
544 void InterpreterMacroAssembler::push_i(Register r) {
545 push(r);
546 }
547
548 void InterpreterMacroAssembler::push_i_or_ptr(Register r) {
549 push(r);
550 }
551
552 void InterpreterMacroAssembler::push_f(XMMRegister r) {
553 subptr(rsp, wordSize);
554 movflt(Address(rsp, 0), r);
555 }
556
557 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
558 movflt(r, Address(rsp, 0));
559 addptr(rsp, wordSize);
560 }
561
562 void InterpreterMacroAssembler::push_d(XMMRegister r) {
563 subptr(rsp, 2 * wordSize);
564 movdbl(Address(rsp, 0), r);
565 }
566
567 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
568 movdbl(r, Address(rsp, 0));
569 addptr(rsp, 2 * Interpreter::stackElementSize);
570 }
571
572 void InterpreterMacroAssembler::pop_i(Register r) {
573 // XXX can't use pop currently, upper half non clean
574 movl(r, Address(rsp, 0));
575 addptr(rsp, wordSize);
576 }
577
578 void InterpreterMacroAssembler::pop_l(Register r) {
579 movq(r, Address(rsp, 0));
580 addptr(rsp, 2 * Interpreter::stackElementSize);
581 }
582
583 void InterpreterMacroAssembler::push_l(Register r) {
584 subptr(rsp, 2 * wordSize);
585 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
586 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
587 }
588
589 void InterpreterMacroAssembler::pop(TosState state) {
590 switch (state) {
591 case atos: pop_ptr(); break;
592 case btos:
593 case ztos:
594 case ctos:
595 case stos:
596 case itos: pop_i(); break;
597 case ltos: pop_l(); break;
598 case ftos: pop_f(xmm0); break;
599 case dtos: pop_d(xmm0); break;
600 case vtos: /* nothing to do */ break;
601 default: ShouldNotReachHere();
602 }
603 interp_verify_oop(rax, state);
604 }
605
606 void InterpreterMacroAssembler::push(TosState state) {
607 interp_verify_oop(rax, state);
608 switch (state) {
609 case atos: push_ptr(); break;
610 case btos:
611 case ztos:
612 case ctos:
613 case stos:
614 case itos: push_i(); break;
615 case ltos: push_l(); break;
616 case ftos: push_f(xmm0); break;
617 case dtos: push_d(xmm0); break;
618 case vtos: /* nothing to do */ break;
619 default : ShouldNotReachHere();
620 }
621 }
622
623 // Helpers for swap and dup
624 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
625 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
626 }
627
628 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
629 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
630 }
631
632
633 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
634 // set sender sp
635 lea(_bcp_register, Address(rsp, wordSize));
636 // record last_sp
637 mov(rcx, _bcp_register);
638 subptr(rcx, rbp);
639 sarptr(rcx, LogBytesPerWord);
640 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rcx);
641 }
642
643
644 // Jump to from_interpreted entry of a call unless single stepping is possible
645 // in this thread in which case we must call the i2i entry
646 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
647 prepare_to_jump_from_interpreted();
648
649 if (JvmtiExport::can_post_interpreter_events()) {
650 Label run_compiled_code;
651 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
652 // compiled code in threads for which the event is enabled. Check here for
653 // interp_only_mode if these events CAN be enabled.
654 // interp_only is an int, on little endian it is sufficient to test the byte only
655 // Is a cmpl faster?
656 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0);
657 jccb(Assembler::zero, run_compiled_code);
658 jmp(Address(method, Method::interpreter_entry_offset()));
659 bind(run_compiled_code);
660 }
661
662 jmp(Address(method, Method::from_interpreted_offset()));
663 }
664
665 // The following two routines provide a hook so that an implementation
666 // can schedule the dispatch in two parts. x86 does not do this.
667 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
668 // Nothing x86 specific to be done here
669 }
670
671 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
672 dispatch_next(state, step);
673 }
674
675 void InterpreterMacroAssembler::dispatch_base(TosState state,
676 address* table,
677 bool verifyoop,
678 bool generate_poll) {
679 if (VerifyActivationFrameSize) {
680 Label L;
681 mov(rcx, rbp);
682 subptr(rcx, rsp);
683 int32_t min_frame_size =
684 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
685 wordSize;
686 cmpptr(rcx, min_frame_size);
687 jcc(Assembler::greaterEqual, L);
688 stop("broken stack frame");
689 bind(L);
690 }
691 if (verifyoop) {
692 interp_verify_oop(rax, state);
693 }
694
695 address* const safepoint_table = Interpreter::safept_table(state);
696 Label no_safepoint, dispatch;
697 if (table != safepoint_table && generate_poll) {
698 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
699 testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
700
701 jccb(Assembler::zero, no_safepoint);
702 lea(rscratch1, ExternalAddress((address)safepoint_table));
703 jmpb(dispatch);
704 }
705
706 bind(no_safepoint);
707 lea(rscratch1, ExternalAddress((address)table));
708 bind(dispatch);
709 jmp(Address(rscratch1, rbx, Address::times_8));
710 }
711
712 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
713 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
714 }
715
716 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
717 dispatch_base(state, Interpreter::normal_table(state));
718 }
719
720 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
721 dispatch_base(state, Interpreter::normal_table(state), false);
722 }
723
724
725 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
726 // load next bytecode (load before advancing _bcp_register to prevent AGI)
727 load_unsigned_byte(rbx, Address(_bcp_register, step));
728 // advance _bcp_register
729 increment(_bcp_register, step);
730 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
731 }
732
733 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
734 // load current bytecode
735 load_unsigned_byte(rbx, Address(_bcp_register, 0));
736 dispatch_base(state, table);
737 }
738
739 void InterpreterMacroAssembler::narrow(Register result) {
740
741 // Get method->_constMethod->_result_type
742 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
743 movptr(rcx, Address(rcx, Method::const_offset()));
744 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
745
746 Label done, notBool, notByte, notChar;
747
748 // common case first
749 cmpl(rcx, T_INT);
750 jcc(Assembler::equal, done);
751
752 // mask integer result to narrower return type.
753 cmpl(rcx, T_BOOLEAN);
754 jcc(Assembler::notEqual, notBool);
755 andl(result, 0x1);
756 jmp(done);
757
758 bind(notBool);
759 cmpl(rcx, T_BYTE);
760 jcc(Assembler::notEqual, notByte);
761 movsbl(result, result);
762 jmp(done);
763
764 bind(notByte);
765 cmpl(rcx, T_CHAR);
766 jcc(Assembler::notEqual, notChar);
767 movzwl(result, result);
768 jmp(done);
769
770 bind(notChar);
771 // cmpl(rcx, T_SHORT); // all that's left
772 // jcc(Assembler::notEqual, done);
773 movswl(result, result);
774
775 // Nothing to do for T_INT
776 bind(done);
777 }
778
779 // remove activation
780 //
781 // Apply stack watermark barrier.
782 // Unlock the receiver if this is a synchronized method.
783 // Unlock any Java monitors from synchronized blocks.
784 // Remove the activation from the stack.
785 //
786 // If there are locked Java monitors
787 // If throw_monitor_exception
788 // throws IllegalMonitorStateException
789 // Else if install_monitor_exception
790 // installs IllegalMonitorStateException
791 // Else
792 // no error processing
793 void InterpreterMacroAssembler::remove_activation(
794 TosState state,
795 Register ret_addr,
796 bool throw_monitor_exception,
797 bool install_monitor_exception,
798 bool notify_jvmdi) {
799 // Note: Registers rdx xmm0 may be in use for the
800 // result check if synchronized method
801 Label unlocked, unlock, no_unlock;
802
803 const Register rthread = r15_thread;
804 const Register robj = c_rarg1;
805 const Register rmon = c_rarg1;
806
807 // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
808 // that would normally not be safe to use. Such bad returns into unsafe territory of
809 // the stack, will call InterpreterRuntime::at_unwind.
810 Label slow_path;
811 Label fast_path;
812 safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
813 jmp(fast_path);
814 bind(slow_path);
815 push(state);
816 set_last_Java_frame(noreg, rbp, (address)pc(), rscratch1);
817 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
818 reset_last_Java_frame(true);
819 pop(state);
820 bind(fast_path);
821
822 // get the value of _do_not_unlock_if_synchronized into rdx
823 const Address do_not_unlock_if_synchronized(rthread,
824 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
825 movbool(rbx, do_not_unlock_if_synchronized);
826 movbool(do_not_unlock_if_synchronized, false); // reset the flag
827
828 // get method access flags
829 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
830 load_unsigned_short(rcx, Address(rcx, Method::access_flags_offset()));
831 testl(rcx, JVM_ACC_SYNCHRONIZED);
832 jcc(Assembler::zero, unlocked);
833
834 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
835 // is set.
836 testbool(rbx);
837 jcc(Assembler::notZero, no_unlock);
838
839 // unlock monitor
840 push(state); // save result
841
842 // BasicObjectLock will be first in list, since this is a
843 // synchronized method. However, need to check that the object has
844 // not been unlocked by an explicit monitorexit bytecode.
845 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
846 wordSize - (int) sizeof(BasicObjectLock));
847 // We use c_rarg1/rdx so that if we go slow path it will be the correct
848 // register for unlock_object to pass to VM directly
849 lea(robj, monitor); // address of first monitor
850
851 movptr(rax, Address(robj, BasicObjectLock::obj_offset()));
852 testptr(rax, rax);
853 jcc(Assembler::notZero, unlock);
854
855 pop(state);
856 if (throw_monitor_exception) {
857 // Entry already unlocked, need to throw exception
858 call_VM(noreg, CAST_FROM_FN_PTR(address,
859 InterpreterRuntime::throw_illegal_monitor_state_exception));
860 should_not_reach_here();
861 } else {
862 // Monitor already unlocked during a stack unroll. If requested,
863 // install an illegal_monitor_state_exception. Continue with
864 // stack unrolling.
865 if (install_monitor_exception) {
866 call_VM(noreg, CAST_FROM_FN_PTR(address,
867 InterpreterRuntime::new_illegal_monitor_state_exception));
868 }
869 jmp(unlocked);
870 }
871
872 bind(unlock);
873 unlock_object(robj);
874 pop(state);
875
876 // Check that for block-structured locking (i.e., that all locked
877 // objects has been unlocked)
878 bind(unlocked);
879
880 // rax, rdx: Might contain return value
881
882 // Check that all monitors are unlocked
883 {
884 Label loop, exception, entry, restart;
885 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
886 const Address monitor_block_top(
887 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
888 const Address monitor_block_bot(
889 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
890
891 bind(restart);
892 // We use c_rarg1 so that if we go slow path it will be the correct
893 // register for unlock_object to pass to VM directly
894 movptr(rmon, monitor_block_top); // derelativize pointer
895 lea(rmon, Address(rbp, rmon, Address::times_ptr));
896 // c_rarg1 points to current entry, starting with top-most entry
897
898 lea(rbx, monitor_block_bot); // points to word before bottom of
899 // monitor block
900 jmp(entry);
901
902 // Entry already locked, need to throw exception
903 bind(exception);
904
905 if (throw_monitor_exception) {
906 // Throw exception
907 MacroAssembler::call_VM(noreg,
908 CAST_FROM_FN_PTR(address, InterpreterRuntime::
909 throw_illegal_monitor_state_exception));
910 should_not_reach_here();
911 } else {
912 // Stack unrolling. Unlock object and install illegal_monitor_exception.
913 // Unlock does not block, so don't have to worry about the frame.
914 // We don't have to preserve c_rarg1 since we are going to throw an exception.
915
916 push(state);
917 mov(robj, rmon); // nop if robj and rmon are the same
918 unlock_object(robj);
919 pop(state);
920
921 if (install_monitor_exception) {
922 call_VM(noreg, CAST_FROM_FN_PTR(address,
923 InterpreterRuntime::
924 new_illegal_monitor_state_exception));
925 }
926
927 jmp(restart);
928 }
929
930 bind(loop);
931 // check if current entry is used
932 cmpptr(Address(rmon, BasicObjectLock::obj_offset()), NULL_WORD);
933 jcc(Assembler::notEqual, exception);
934
935 addptr(rmon, entry_size); // otherwise advance to next entry
936 bind(entry);
937 cmpptr(rmon, rbx); // check if bottom reached
938 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
939 }
940
941 bind(no_unlock);
942
943 // jvmti support
944 if (notify_jvmdi) {
945 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
946 } else {
947 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
948 }
949
950 // remove activation
951 // get sender sp
952 movptr(rbx,
953 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
954 if (StackReservedPages > 0) {
955 // testing if reserved zone needs to be re-enabled
956 Register rthread = r15_thread;
957 Label no_reserved_zone_enabling;
958
959 // check if already enabled - if so no re-enabling needed
960 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
961 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
962 jcc(Assembler::equal, no_reserved_zone_enabling);
963
964 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
965 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
966
967 call_VM_leaf(
968 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
969 call_VM(noreg, CAST_FROM_FN_PTR(address,
970 InterpreterRuntime::throw_delayed_StackOverflowError));
971 should_not_reach_here();
972
973 bind(no_reserved_zone_enabling);
974 }
975 leave(); // remove frame anchor
976 pop(ret_addr); // get return address
977 mov(rsp, rbx); // set sp to sender sp
978 pop_cont_fastpath();
979 }
980
981 void InterpreterMacroAssembler::get_method_counters(Register method,
982 Register mcs, Label& skip) {
983 Label has_counters;
984 movptr(mcs, Address(method, Method::method_counters_offset()));
985 testptr(mcs, mcs);
986 jcc(Assembler::notZero, has_counters);
987 call_VM(noreg, CAST_FROM_FN_PTR(address,
988 InterpreterRuntime::build_method_counters), method);
989 movptr(mcs, Address(method,Method::method_counters_offset()));
990 testptr(mcs, mcs);
991 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
992 bind(has_counters);
993 }
994
995
996 // Lock object
997 //
998 // Args:
999 // rdx, c_rarg1: BasicObjectLock to be used for locking
1000 //
1001 // Kills:
1002 // rax, rbx
1003 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1004 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1005
1006 if (LockingMode == LM_MONITOR) {
1007 call_VM_preemptable(noreg,
1008 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1009 lock_reg);
1010 } else {
1011 Label count_locking, done, slow_case;
1012
1013 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1014 const Register tmp_reg = rbx;
1015 const Register obj_reg = c_rarg3; // Will contain the oop
1016 const Register rklass_decode_tmp = rscratch1;
1017
1018 const int obj_offset = in_bytes(BasicObjectLock::obj_offset());
1019 const int lock_offset = in_bytes(BasicObjectLock::lock_offset());
1020 const int mark_offset = lock_offset +
1021 BasicLock::displaced_header_offset_in_bytes();
1022
1023 // Load object pointer into obj_reg
1024 movptr(obj_reg, Address(lock_reg, obj_offset));
1025
1026 if (DiagnoseSyncOnValueBasedClasses != 0) {
1027 load_klass(tmp_reg, obj_reg, rklass_decode_tmp);
1028 testb(Address(tmp_reg, Klass::misc_flags_offset()), KlassFlags::_misc_is_value_based_class);
1029 jcc(Assembler::notZero, slow_case);
1030 }
1031
1032 if (LockingMode == LM_LIGHTWEIGHT) {
1033 lightweight_lock(lock_reg, obj_reg, swap_reg, tmp_reg, slow_case);
1034 } else if (LockingMode == LM_LEGACY) {
1035 // Load immediate 1 into swap_reg %rax
1036 movl(swap_reg, 1);
1037
1038 // Load (object->mark() | 1) into swap_reg %rax
1039 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1040
1041 // Save (object->mark() | 1) into BasicLock's displaced header
1042 movptr(Address(lock_reg, mark_offset), swap_reg);
1043
1044 assert(lock_offset == 0,
1045 "displaced header must be first word in BasicObjectLock");
1046
1047 lock();
1048 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1049 jcc(Assembler::zero, count_locking);
1050
1051 const int zero_bits = 7;
1052
1053 // Fast check for recursive lock.
1054 //
1055 // Can apply the optimization only if this is a stack lock
1056 // allocated in this thread. For efficiency, we can focus on
1057 // recently allocated stack locks (instead of reading the stack
1058 // base and checking whether 'mark' points inside the current
1059 // thread stack):
1060 // 1) (mark & zero_bits) == 0, and
1061 // 2) rsp <= mark < mark + os::pagesize()
1062 //
1063 // Warning: rsp + os::pagesize can overflow the stack base. We must
1064 // neither apply the optimization for an inflated lock allocated
1065 // just above the thread stack (this is why condition 1 matters)
1066 // nor apply the optimization if the stack lock is inside the stack
1067 // of another thread. The latter is avoided even in case of overflow
1068 // because we have guard pages at the end of all stacks. Hence, if
1069 // we go over the stack base and hit the stack of another thread,
1070 // this should not be in a writeable area that could contain a
1071 // stack lock allocated by that thread. As a consequence, a stack
1072 // lock less than page size away from rsp is guaranteed to be
1073 // owned by the current thread.
1074 //
1075 // These 3 tests can be done by evaluating the following
1076 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1077 // assuming both stack pointer and pagesize have their
1078 // least significant bits clear.
1079 // NOTE: the mark is in swap_reg %rax as the result of cmpxchg
1080 subptr(swap_reg, rsp);
1081 andptr(swap_reg, zero_bits - (int)os::vm_page_size());
1082
1083 // Save the test result, for recursive case, the result is zero
1084 movptr(Address(lock_reg, mark_offset), swap_reg);
1085 jcc(Assembler::notZero, slow_case);
1086
1087 bind(count_locking);
1088 inc_held_monitor_count();
1089 }
1090 jmp(done);
1091
1092 bind(slow_case);
1093
1094 // Call the runtime routine for slow case
1095 call_VM_preemptable(noreg,
1096 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1097 lock_reg);
1098 bind(done);
1099 }
1100 }
1101
1102
1103 // Unlocks an object. Used in monitorexit bytecode and
1104 // remove_activation. Throws an IllegalMonitorException if object is
1105 // not locked by current thread.
1106 //
1107 // Args:
1108 // rdx, c_rarg1: BasicObjectLock for lock
1109 //
1110 // Kills:
1111 // rax
1112 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1113 // rscratch1 (scratch reg)
1114 // rax, rbx, rcx, rdx
1115 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1116 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1117
1118 if (LockingMode == LM_MONITOR) {
1119 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1120 } else {
1121 Label count_locking, done, slow_case;
1122
1123 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1124 const Register header_reg = c_rarg2; // Will contain the old oopMark
1125 const Register obj_reg = c_rarg3; // Will contain the oop
1126
1127 save_bcp(); // Save in case of exception
1128
1129 if (LockingMode != LM_LIGHTWEIGHT) {
1130 // Convert from BasicObjectLock structure to object and BasicLock
1131 // structure Store the BasicLock address into %rax
1132 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset()));
1133 }
1134
1135 // Load oop into obj_reg(%c_rarg3)
1136 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
1137
1138 // Free entry
1139 movptr(Address(lock_reg, BasicObjectLock::obj_offset()), NULL_WORD);
1140
1141 if (LockingMode == LM_LIGHTWEIGHT) {
1142 lightweight_unlock(obj_reg, swap_reg, header_reg, slow_case);
1143 } else if (LockingMode == LM_LEGACY) {
1144 // Load the old header from BasicLock structure
1145 movptr(header_reg, Address(swap_reg,
1146 BasicLock::displaced_header_offset_in_bytes()));
1147
1148 // Test for recursion
1149 testptr(header_reg, header_reg);
1150
1151 // zero for recursive case
1152 jcc(Assembler::zero, count_locking);
1153
1154 // Atomic swap back the old header
1155 lock();
1156 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1157
1158 // zero for simple unlock of a stack-lock case
1159 jcc(Assembler::notZero, slow_case);
1160
1161 bind(count_locking);
1162 dec_held_monitor_count();
1163 }
1164 jmp(done);
1165
1166 bind(slow_case);
1167 // Call the runtime routine for slow case.
1168 movptr(Address(lock_reg, BasicObjectLock::obj_offset()), obj_reg); // restore obj
1169 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1170
1171 bind(done);
1172
1173 restore_bcp();
1174 }
1175 }
1176
1177 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1178 Label& zero_continue) {
1179 assert(ProfileInterpreter, "must be profiling interpreter");
1180 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1181 testptr(mdp, mdp);
1182 jcc(Assembler::zero, zero_continue);
1183 }
1184
1185
1186 // Set the method data pointer for the current bcp.
1187 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1188 assert(ProfileInterpreter, "must be profiling interpreter");
1189 Label set_mdp;
1190 push(rax);
1191 push(rbx);
1192
1193 get_method(rbx);
1194 // Test MDO to avoid the call if it is null.
1195 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1196 testptr(rax, rax);
1197 jcc(Assembler::zero, set_mdp);
1198 // rbx: method
1199 // _bcp_register: bcp
1200 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1201 // rax: mdi
1202 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1203 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1204 addptr(rbx, in_bytes(MethodData::data_offset()));
1205 addptr(rax, rbx);
1206 bind(set_mdp);
1207 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1208 pop(rbx);
1209 pop(rax);
1210 }
1211
1212 void InterpreterMacroAssembler::verify_method_data_pointer() {
1213 assert(ProfileInterpreter, "must be profiling interpreter");
1214 #ifdef ASSERT
1215 Label verify_continue;
1216 push(rax);
1217 push(rbx);
1218 Register arg3_reg = c_rarg3;
1219 Register arg2_reg = c_rarg2;
1220 push(arg3_reg);
1221 push(arg2_reg);
1222 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1223 get_method(rbx);
1224
1225 // If the mdp is valid, it will point to a DataLayout header which is
1226 // consistent with the bcp. The converse is highly probable also.
1227 load_unsigned_short(arg2_reg,
1228 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1229 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1230 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1231 cmpptr(arg2_reg, _bcp_register);
1232 jcc(Assembler::equal, verify_continue);
1233 // rbx: method
1234 // _bcp_register: bcp
1235 // c_rarg3: mdp
1236 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1237 rbx, _bcp_register, arg3_reg);
1238 bind(verify_continue);
1239 pop(arg2_reg);
1240 pop(arg3_reg);
1241 pop(rbx);
1242 pop(rax);
1243 #endif // ASSERT
1244 }
1245
1246
1247 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1248 int constant,
1249 Register value) {
1250 assert(ProfileInterpreter, "must be profiling interpreter");
1251 Address data(mdp_in, constant);
1252 movptr(data, value);
1253 }
1254
1255
1256 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1257 int constant,
1258 bool decrement) {
1259 // Counter address
1260 Address data(mdp_in, constant);
1261
1262 increment_mdp_data_at(data, decrement);
1263 }
1264
1265 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1266 bool decrement) {
1267 assert(ProfileInterpreter, "must be profiling interpreter");
1268 // %%% this does 64bit counters at best it is wasting space
1269 // at worst it is a rare bug when counters overflow
1270
1271 if (decrement) {
1272 // Decrement the register. Set condition codes.
1273 addptr(data, -DataLayout::counter_increment);
1274 // If the decrement causes the counter to overflow, stay negative
1275 Label L;
1276 jcc(Assembler::negative, L);
1277 addptr(data, DataLayout::counter_increment);
1278 bind(L);
1279 } else {
1280 assert(DataLayout::counter_increment == 1,
1281 "flow-free idiom only works with 1");
1282 // Increment the register. Set carry flag.
1283 addptr(data, DataLayout::counter_increment);
1284 // If the increment causes the counter to overflow, pull back by 1.
1285 sbbptr(data, 0);
1286 }
1287 }
1288
1289
1290 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1291 Register reg,
1292 int constant,
1293 bool decrement) {
1294 Address data(mdp_in, reg, Address::times_1, constant);
1295
1296 increment_mdp_data_at(data, decrement);
1297 }
1298
1299 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1300 int flag_byte_constant) {
1301 assert(ProfileInterpreter, "must be profiling interpreter");
1302 int header_offset = in_bytes(DataLayout::flags_offset());
1303 int header_bits = flag_byte_constant;
1304 // Set the flag
1305 orb(Address(mdp_in, header_offset), header_bits);
1306 }
1307
1308
1309
1310 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1311 int offset,
1312 Register value,
1313 Register test_value_out,
1314 Label& not_equal_continue) {
1315 assert(ProfileInterpreter, "must be profiling interpreter");
1316 if (test_value_out == noreg) {
1317 cmpptr(value, Address(mdp_in, offset));
1318 } else {
1319 // Put the test value into a register, so caller can use it:
1320 movptr(test_value_out, Address(mdp_in, offset));
1321 cmpptr(test_value_out, value);
1322 }
1323 jcc(Assembler::notEqual, not_equal_continue);
1324 }
1325
1326
1327 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1328 int offset_of_disp) {
1329 assert(ProfileInterpreter, "must be profiling interpreter");
1330 Address disp_address(mdp_in, offset_of_disp);
1331 addptr(mdp_in, disp_address);
1332 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1333 }
1334
1335
1336 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1337 Register reg,
1338 int offset_of_disp) {
1339 assert(ProfileInterpreter, "must be profiling interpreter");
1340 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1341 addptr(mdp_in, disp_address);
1342 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1343 }
1344
1345
1346 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1347 int constant) {
1348 assert(ProfileInterpreter, "must be profiling interpreter");
1349 addptr(mdp_in, constant);
1350 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1351 }
1352
1353
1354 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1355 assert(ProfileInterpreter, "must be profiling interpreter");
1356 push(return_bci); // save/restore across call_VM
1357 call_VM(noreg,
1358 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1359 return_bci);
1360 pop(return_bci);
1361 }
1362
1363
1364 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1365 Register bumped_count) {
1366 if (ProfileInterpreter) {
1367 Label profile_continue;
1368
1369 // If no method data exists, go to profile_continue.
1370 // Otherwise, assign to mdp
1371 test_method_data_pointer(mdp, profile_continue);
1372
1373 // We are taking a branch. Increment the taken count.
1374 // We inline increment_mdp_data_at to return bumped_count in a register
1375 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1376 Address data(mdp, in_bytes(JumpData::taken_offset()));
1377 movptr(bumped_count, data);
1378 assert(DataLayout::counter_increment == 1,
1379 "flow-free idiom only works with 1");
1380 addptr(bumped_count, DataLayout::counter_increment);
1381 sbbptr(bumped_count, 0);
1382 movptr(data, bumped_count); // Store back out
1383
1384 // The method data pointer needs to be updated to reflect the new target.
1385 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1386 bind(profile_continue);
1387 }
1388 }
1389
1390
1391 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1392 if (ProfileInterpreter) {
1393 Label profile_continue;
1394
1395 // If no method data exists, go to profile_continue.
1396 test_method_data_pointer(mdp, profile_continue);
1397
1398 // We are taking a branch. Increment the not taken count.
1399 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1400
1401 // The method data pointer needs to be updated to correspond to
1402 // the next bytecode
1403 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1404 bind(profile_continue);
1405 }
1406 }
1407
1408 void InterpreterMacroAssembler::profile_call(Register mdp) {
1409 if (ProfileInterpreter) {
1410 Label profile_continue;
1411
1412 // If no method data exists, go to profile_continue.
1413 test_method_data_pointer(mdp, profile_continue);
1414
1415 // We are making a call. Increment the count.
1416 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1417
1418 // The method data pointer needs to be updated to reflect the new target.
1419 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1420 bind(profile_continue);
1421 }
1422 }
1423
1424
1425 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1426 if (ProfileInterpreter) {
1427 Label profile_continue;
1428
1429 // If no method data exists, go to profile_continue.
1430 test_method_data_pointer(mdp, profile_continue);
1431
1432 // We are making a call. Increment the count.
1433 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1434
1435 // The method data pointer needs to be updated to reflect the new target.
1436 update_mdp_by_constant(mdp,
1437 in_bytes(VirtualCallData::
1438 virtual_call_data_size()));
1439 bind(profile_continue);
1440 }
1441 }
1442
1443
1444 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1445 Register mdp,
1446 Register reg2,
1447 bool receiver_can_be_null) {
1448 if (ProfileInterpreter) {
1449 Label profile_continue;
1450
1451 // If no method data exists, go to profile_continue.
1452 test_method_data_pointer(mdp, profile_continue);
1453
1454 Label skip_receiver_profile;
1455 if (receiver_can_be_null) {
1456 Label not_null;
1457 testptr(receiver, receiver);
1458 jccb(Assembler::notZero, not_null);
1459 // We are making a call. Increment the count for null receiver.
1460 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1461 jmp(skip_receiver_profile);
1462 bind(not_null);
1463 }
1464
1465 // Record the receiver type.
1466 record_klass_in_profile(receiver, mdp, reg2, true);
1467 bind(skip_receiver_profile);
1468
1469 // The method data pointer needs to be updated to reflect the new target.
1470 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1471 bind(profile_continue);
1472 }
1473 }
1474
1475 // This routine creates a state machine for updating the multi-row
1476 // type profile at a virtual call site (or other type-sensitive bytecode).
1477 // The machine visits each row (of receiver/count) until the receiver type
1478 // is found, or until it runs out of rows. At the same time, it remembers
1479 // the location of the first empty row. (An empty row records null for its
1480 // receiver, and can be allocated for a newly-observed receiver type.)
1481 // Because there are two degrees of freedom in the state, a simple linear
1482 // search will not work; it must be a decision tree. Hence this helper
1483 // function is recursive, to generate the required tree structured code.
1484 // It's the interpreter, so we are trading off code space for speed.
1485 // See below for example code.
1486 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1487 Register receiver, Register mdp,
1488 Register reg2, int start_row,
1489 Label& done, bool is_virtual_call) {
1490 if (TypeProfileWidth == 0) {
1491 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1492 } else {
1493 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1494 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
1495 }
1496 }
1497
1498 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, Register reg2, int start_row,
1499 Label& done, int total_rows,
1500 OffsetFunction item_offset_fn,
1501 OffsetFunction item_count_offset_fn) {
1502 int last_row = total_rows - 1;
1503 assert(start_row <= last_row, "must be work left to do");
1504 // Test this row for both the item and for null.
1505 // Take any of three different outcomes:
1506 // 1. found item => increment count and goto done
1507 // 2. found null => keep looking for case 1, maybe allocate this cell
1508 // 3. found something else => keep looking for cases 1 and 2
1509 // Case 3 is handled by a recursive call.
1510 for (int row = start_row; row <= last_row; row++) {
1511 Label next_test;
1512 bool test_for_null_also = (row == start_row);
1513
1514 // See if the item is item[n].
1515 int item_offset = in_bytes(item_offset_fn(row));
1516 test_mdp_data_at(mdp, item_offset, item,
1517 (test_for_null_also ? reg2 : noreg),
1518 next_test);
1519 // (Reg2 now contains the item from the CallData.)
1520
1521 // The item is item[n]. Increment count[n].
1522 int count_offset = in_bytes(item_count_offset_fn(row));
1523 increment_mdp_data_at(mdp, count_offset);
1524 jmp(done);
1525 bind(next_test);
1526
1527 if (test_for_null_also) {
1528 // Failed the equality check on item[n]... Test for null.
1529 testptr(reg2, reg2);
1530 if (start_row == last_row) {
1531 // The only thing left to do is handle the null case.
1532 Label found_null;
1533 jccb(Assembler::zero, found_null);
1534 // Item did not match any saved item and there is no empty row for it.
1535 // Increment total counter to indicate polymorphic case.
1536 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1537 jmp(done);
1538 bind(found_null);
1539 break;
1540 }
1541 Label found_null;
1542 // Since null is rare, make it be the branch-taken case.
1543 jcc(Assembler::zero, found_null);
1544
1545 // Put all the "Case 3" tests here.
1546 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1547 item_offset_fn, item_count_offset_fn);
1548
1549 // Found a null. Keep searching for a matching item,
1550 // but remember that this is an empty (unused) slot.
1551 bind(found_null);
1552 }
1553 }
1554
1555 // In the fall-through case, we found no matching item, but we
1556 // observed the item[start_row] is null.
1557
1558 // Fill in the item field and increment the count.
1559 int item_offset = in_bytes(item_offset_fn(start_row));
1560 set_mdp_data_at(mdp, item_offset, item);
1561 int count_offset = in_bytes(item_count_offset_fn(start_row));
1562 movl(reg2, DataLayout::counter_increment);
1563 set_mdp_data_at(mdp, count_offset, reg2);
1564 if (start_row > 0) {
1565 jmp(done);
1566 }
1567 }
1568
1569 // Example state machine code for three profile rows:
1570 // // main copy of decision tree, rooted at row[1]
1571 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1572 // if (row[0].rec != nullptr) {
1573 // // inner copy of decision tree, rooted at row[1]
1574 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1575 // if (row[1].rec != nullptr) {
1576 // // degenerate decision tree, rooted at row[2]
1577 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1578 // if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
1579 // row[2].init(rec); goto done;
1580 // } else {
1581 // // remember row[1] is empty
1582 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1583 // row[1].init(rec); goto done;
1584 // }
1585 // } else {
1586 // // remember row[0] is empty
1587 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1588 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1589 // row[0].init(rec); goto done;
1590 // }
1591 // done:
1592
1593 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1594 Register mdp, Register reg2,
1595 bool is_virtual_call) {
1596 assert(ProfileInterpreter, "must be profiling");
1597 Label done;
1598
1599 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1600
1601 bind (done);
1602 }
1603
1604 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1605 Register mdp) {
1606 if (ProfileInterpreter) {
1607 Label profile_continue;
1608 uint row;
1609
1610 // If no method data exists, go to profile_continue.
1611 test_method_data_pointer(mdp, profile_continue);
1612
1613 // Update the total ret count.
1614 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1615
1616 for (row = 0; row < RetData::row_limit(); row++) {
1617 Label next_test;
1618
1619 // See if return_bci is equal to bci[n]:
1620 test_mdp_data_at(mdp,
1621 in_bytes(RetData::bci_offset(row)),
1622 return_bci, noreg,
1623 next_test);
1624
1625 // return_bci is equal to bci[n]. Increment the count.
1626 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1627
1628 // The method data pointer needs to be updated to reflect the new target.
1629 update_mdp_by_offset(mdp,
1630 in_bytes(RetData::bci_displacement_offset(row)));
1631 jmp(profile_continue);
1632 bind(next_test);
1633 }
1634
1635 update_mdp_for_ret(return_bci);
1636
1637 bind(profile_continue);
1638 }
1639 }
1640
1641
1642 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1643 if (ProfileInterpreter) {
1644 Label profile_continue;
1645
1646 // If no method data exists, go to profile_continue.
1647 test_method_data_pointer(mdp, profile_continue);
1648
1649 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1650
1651 // The method data pointer needs to be updated.
1652 int mdp_delta = in_bytes(BitData::bit_data_size());
1653 if (TypeProfileCasts) {
1654 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1655 }
1656 update_mdp_by_constant(mdp, mdp_delta);
1657
1658 bind(profile_continue);
1659 }
1660 }
1661
1662
1663 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1664 if (ProfileInterpreter) {
1665 Label profile_continue;
1666
1667 // If no method data exists, go to profile_continue.
1668 test_method_data_pointer(mdp, profile_continue);
1669
1670 // The method data pointer needs to be updated.
1671 int mdp_delta = in_bytes(BitData::bit_data_size());
1672 if (TypeProfileCasts) {
1673 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1674
1675 // Record the object type.
1676 record_klass_in_profile(klass, mdp, reg2, false);
1677 }
1678 update_mdp_by_constant(mdp, mdp_delta);
1679
1680 bind(profile_continue);
1681 }
1682 }
1683
1684
1685 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1686 if (ProfileInterpreter) {
1687 Label profile_continue;
1688
1689 // If no method data exists, go to profile_continue.
1690 test_method_data_pointer(mdp, profile_continue);
1691
1692 // Update the default case count
1693 increment_mdp_data_at(mdp,
1694 in_bytes(MultiBranchData::default_count_offset()));
1695
1696 // The method data pointer needs to be updated.
1697 update_mdp_by_offset(mdp,
1698 in_bytes(MultiBranchData::
1699 default_displacement_offset()));
1700
1701 bind(profile_continue);
1702 }
1703 }
1704
1705
1706 void InterpreterMacroAssembler::profile_switch_case(Register index,
1707 Register mdp,
1708 Register reg2) {
1709 if (ProfileInterpreter) {
1710 Label profile_continue;
1711
1712 // If no method data exists, go to profile_continue.
1713 test_method_data_pointer(mdp, profile_continue);
1714
1715 // Build the base (index * per_case_size_in_bytes()) +
1716 // case_array_offset_in_bytes()
1717 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1718 imulptr(index, reg2); // XXX l ?
1719 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1720
1721 // Update the case count
1722 increment_mdp_data_at(mdp,
1723 index,
1724 in_bytes(MultiBranchData::relative_count_offset()));
1725
1726 // The method data pointer needs to be updated.
1727 update_mdp_by_offset(mdp,
1728 index,
1729 in_bytes(MultiBranchData::
1730 relative_displacement_offset()));
1731
1732 bind(profile_continue);
1733 }
1734 }
1735
1736
1737
1738 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1739 if (state == atos) {
1740 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1741 }
1742 }
1743
1744
1745 // Jump if ((*counter_addr += increment) & mask) == 0
1746 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
1747 Register scratch, Label* where) {
1748 // This update is actually not atomic and can lose a number of updates
1749 // under heavy contention, but the alternative of using the (contended)
1750 // atomic update here penalizes profiling paths too much.
1751 movl(scratch, counter_addr);
1752 incrementl(scratch, InvocationCounter::count_increment);
1753 movl(counter_addr, scratch);
1754 andl(scratch, mask);
1755 if (where != nullptr) {
1756 jcc(Assembler::zero, *where);
1757 }
1758 }
1759
1760 void InterpreterMacroAssembler::notify_method_entry() {
1761 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1762 // track stack depth. If it is possible to enter interp_only_mode we add
1763 // the code to check if the event should be sent.
1764 Register rthread = r15_thread;
1765 Register rarg = c_rarg1;
1766 if (JvmtiExport::can_post_interpreter_events()) {
1767 Label L;
1768 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1769 testl(rdx, rdx);
1770 jcc(Assembler::zero, L);
1771 call_VM(noreg, CAST_FROM_FN_PTR(address,
1772 InterpreterRuntime::post_method_entry));
1773 bind(L);
1774 }
1775
1776 if (DTraceMethodProbes) {
1777 get_method(rarg);
1778 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1779 rthread, rarg);
1780 }
1781
1782 // RedefineClasses() tracing support for obsolete method entry
1783 if (log_is_enabled(Trace, redefine, class, obsolete)) {
1784 get_method(rarg);
1785 call_VM_leaf(
1786 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1787 rthread, rarg);
1788 }
1789 }
1790
1791
1792 void InterpreterMacroAssembler::notify_method_exit(
1793 TosState state, NotifyMethodExitMode mode) {
1794 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1795 // track stack depth. If it is possible to enter interp_only_mode we add
1796 // the code to check if the event should be sent.
1797 Register rthread = r15_thread;
1798 Register rarg = c_rarg1;
1799 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1800 Label L;
1801 // Note: frame::interpreter_frame_result has a dependency on how the
1802 // method result is saved across the call to post_method_exit. If this
1803 // is changed then the interpreter_frame_result implementation will
1804 // need to be updated too.
1805
1806 // template interpreter will leave the result on the top of the stack.
1807 push(state);
1808 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1809 testl(rdx, rdx);
1810 jcc(Assembler::zero, L);
1811 call_VM(noreg,
1812 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1813 bind(L);
1814 pop(state);
1815 }
1816
1817 if (DTraceMethodProbes) {
1818 push(state);
1819 get_method(rarg);
1820 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1821 rthread, rarg);
1822 pop(state);
1823 }
1824 }
1825
1826 void InterpreterMacroAssembler::load_resolved_indy_entry(Register cache, Register index) {
1827 // Get index out of bytecode pointer
1828 get_cache_index_at_bcp(index, 1, sizeof(u4));
1829 // Get address of invokedynamic array
1830 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
1831 movptr(cache, Address(cache, in_bytes(ConstantPoolCache::invokedynamic_entries_offset())));
1832 if (is_power_of_2(sizeof(ResolvedIndyEntry))) {
1833 shll(index, log2i_exact(sizeof(ResolvedIndyEntry))); // Scale index by power of 2
1834 } else {
1835 imull(index, index, sizeof(ResolvedIndyEntry)); // Scale the index to be the entry index * sizeof(ResolvedIndyEntry)
1836 }
1837 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedIndyEntry>::base_offset_in_bytes()));
1838 }
1839
1840 void InterpreterMacroAssembler::load_field_entry(Register cache, Register index, int bcp_offset) {
1841 // Get index out of bytecode pointer
1842 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
1843 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
1844
1845 movptr(cache, Address(cache, ConstantPoolCache::field_entries_offset()));
1846 // Take shortcut if the size is a power of 2
1847 if (is_power_of_2(sizeof(ResolvedFieldEntry))) {
1848 shll(index, log2i_exact(sizeof(ResolvedFieldEntry))); // Scale index by power of 2
1849 } else {
1850 imull(index, index, sizeof(ResolvedFieldEntry)); // Scale the index to be the entry index * sizeof(ResolvedFieldEntry)
1851 }
1852 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedFieldEntry>::base_offset_in_bytes()));
1853 }
1854
1855 void InterpreterMacroAssembler::load_method_entry(Register cache, Register index, int bcp_offset) {
1856 // Get index out of bytecode pointer
1857 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
1858 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
1859
1860 movptr(cache, Address(cache, ConstantPoolCache::method_entries_offset()));
1861 imull(index, index, sizeof(ResolvedMethodEntry)); // Scale the index to be the entry index * sizeof(ResolvedMethodEntry)
1862 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedMethodEntry>::base_offset_in_bytes()));
1863 }