1 /*
2 * Copyright (c) 2003, 2026, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2020, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "asm/macroAssembler.inline.hpp"
27 #include "compiler/compiler_globals.hpp"
28 #include "gc/shared/barrierSet.hpp"
29 #include "gc/shared/barrierSetAssembler.hpp"
30 #include "interp_masm_aarch64.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "logging/log.hpp"
34 #include "oops/arrayOop.hpp"
35 #include "oops/constMethodFlags.hpp"
36 #include "oops/markWord.hpp"
37 #include "oops/method.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/inlineKlass.hpp"
40 #include "oops/resolvedFieldEntry.hpp"
41 #include "oops/resolvedIndyEntry.hpp"
42 #include "oops/resolvedMethodEntry.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "prims/jvmtiThreadState.hpp"
45 #include "runtime/basicLock.hpp"
46 #include "runtime/frame.inline.hpp"
47 #include "runtime/javaThread.hpp"
48 #include "runtime/safepointMechanism.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "utilities/powerOfTwo.hpp"
51
52 void InterpreterMacroAssembler::narrow(Register result) {
53
54 // Get method->_constMethod->_result_type
55 ldr(rscratch1, Address(rfp, frame::interpreter_frame_method_offset * wordSize));
56 ldr(rscratch1, Address(rscratch1, Method::const_offset()));
57 ldrb(rscratch1, Address(rscratch1, ConstMethod::result_type_offset()));
58
59 Label done, notBool, notByte, notChar;
60
61 // common case first
62 cmpw(rscratch1, T_INT);
63 br(Assembler::EQ, done);
64
65 // mask integer result to narrower return type.
66 cmpw(rscratch1, T_BOOLEAN);
67 br(Assembler::NE, notBool);
68 andw(result, result, 0x1);
69 b(done);
70
71 bind(notBool);
72 cmpw(rscratch1, T_BYTE);
73 br(Assembler::NE, notByte);
74 sbfx(result, result, 0, 8);
75 b(done);
76
77 bind(notByte);
78 cmpw(rscratch1, T_CHAR);
79 br(Assembler::NE, notChar);
80 ubfx(result, result, 0, 16); // truncate upper 16 bits
81 b(done);
82
83 bind(notChar);
84 sbfx(result, result, 0, 16); // sign-extend short
85
86 // Nothing to do for T_INT
87 bind(done);
88 }
89
90 void InterpreterMacroAssembler::jump_to_entry(address entry) {
91 assert(entry, "Entry must have been generated by now");
92 b(entry);
93 }
94
95 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
96 if (JvmtiExport::can_pop_frame()) {
97 Label L;
98 // Initiate popframe handling only if it is not already being
99 // processed. If the flag has the popframe_processing bit set, it
100 // means that this code is called *during* popframe handling - we
101 // don't want to reenter.
102 // This method is only called just after the call into the vm in
103 // call_VM_base, so the arg registers are available.
104 ldrw(rscratch1, Address(rthread, JavaThread::popframe_condition_offset()));
105 tbz(rscratch1, exact_log2(JavaThread::popframe_pending_bit), L);
106 tbnz(rscratch1, exact_log2(JavaThread::popframe_processing_bit), L);
107 // Call Interpreter::remove_activation_preserving_args_entry() to get the
108 // address of the same-named entrypoint in the generated interpreter code.
109 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
110 br(r0);
111 bind(L);
112 }
113 }
114
115
116 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
117 ldr(r2, Address(rthread, JavaThread::jvmti_thread_state_offset()));
118 const Address tos_addr(r2, JvmtiThreadState::earlyret_tos_offset());
119 const Address oop_addr(r2, JvmtiThreadState::earlyret_oop_offset());
120 const Address val_addr(r2, JvmtiThreadState::earlyret_value_offset());
121 switch (state) {
122 case atos: ldr(r0, oop_addr);
123 str(zr, oop_addr);
124 interp_verify_oop(r0, state); break;
125 case ltos: ldr(r0, val_addr); break;
126 case btos: // fall through
127 case ztos: // fall through
128 case ctos: // fall through
129 case stos: // fall through
130 case itos: ldrw(r0, val_addr); break;
131 case ftos: ldrs(v0, val_addr); break;
132 case dtos: ldrd(v0, val_addr); break;
133 case vtos: /* nothing to do */ break;
134 default : ShouldNotReachHere();
135 }
136 // Clean up tos value in the thread object
137 movw(rscratch1, (int) ilgl);
138 strw(rscratch1, tos_addr);
139 strw(zr, val_addr);
140 }
141
142
143 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
144 if (JvmtiExport::can_force_early_return()) {
145 Label L;
146 ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset()));
147 cbz(rscratch1, L); // if (thread->jvmti_thread_state() == nullptr) exit;
148
149 // Initiate earlyret handling only if it is not already being processed.
150 // If the flag has the earlyret_processing bit set, it means that this code
151 // is called *during* earlyret handling - we don't want to reenter.
152 ldrw(rscratch1, Address(rscratch1, JvmtiThreadState::earlyret_state_offset()));
153 cmpw(rscratch1, JvmtiThreadState::earlyret_pending);
154 br(Assembler::NE, L);
155
156 // Call Interpreter::remove_activation_early_entry() to get the address of the
157 // same-named entrypoint in the generated interpreter code.
158 ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset()));
159 ldrw(rscratch1, Address(rscratch1, JvmtiThreadState::earlyret_tos_offset()));
160 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), rscratch1);
161 br(r0);
162 bind(L);
163 }
164 }
165
166 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(
167 Register reg,
168 int bcp_offset) {
169 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
170 ldrh(reg, Address(rbcp, bcp_offset));
171 rev16(reg, reg);
172 }
173
174 void InterpreterMacroAssembler::get_dispatch() {
175 uint64_t offset;
176 adrp(rdispatch, ExternalAddress((address)Interpreter::dispatch_table()), offset);
177 // Use add() here after ARDP, rather than lea().
178 // lea() does not generate anything if its offset is zero.
179 // However, relocs expect to find either an ADD or a load/store
180 // insn after an ADRP. add() always generates an ADD insn, even
181 // for add(Rn, Rn, 0).
182 add(rdispatch, rdispatch, offset);
183 }
184
185 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
186 int bcp_offset,
187 size_t index_size) {
188 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
189 if (index_size == sizeof(u2)) {
190 load_unsigned_short(index, Address(rbcp, bcp_offset));
191 } else if (index_size == sizeof(u4)) {
192 // assert(EnableInvokeDynamic, "giant index used only for JSR 292");
193 ldrw(index, Address(rbcp, bcp_offset));
194 } else if (index_size == sizeof(u1)) {
195 load_unsigned_byte(index, Address(rbcp, bcp_offset));
196 } else {
197 ShouldNotReachHere();
198 }
199 }
200
201 void InterpreterMacroAssembler::get_method_counters(Register method,
202 Register mcs, Label& skip) {
203 Label has_counters;
204 ldr(mcs, Address(method, Method::method_counters_offset()));
205 cbnz(mcs, has_counters);
206 call_VM(noreg, CAST_FROM_FN_PTR(address,
207 InterpreterRuntime::build_method_counters), method);
208 ldr(mcs, Address(method, Method::method_counters_offset()));
209 cbz(mcs, skip); // No MethodCounters allocated, OutOfMemory
210 bind(has_counters);
211 }
212
213 void InterpreterMacroAssembler::read_flat_field(Register entry, Register obj) {
214 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field), obj, entry);
215 }
216
217 void InterpreterMacroAssembler::write_flat_field(Register entry, Register field_offset,
218 Register tmp1, Register tmp2,
219 Register obj) {
220 assert_different_registers(entry, field_offset, tmp1, tmp2, obj);
221 Label slow_path, done;
222
223 load_unsigned_byte(tmp1, Address(entry, in_bytes(ResolvedFieldEntry::flags_offset())));
224 test_field_is_not_null_free_inline_type(tmp1, noreg /* temp */, slow_path);
225
226 null_check(r0); // FIXME JDK-8341120
227
228 add(obj, obj, field_offset);
229
230 load_klass(tmp1, r0);
231 payload_address(r0, r0, tmp1);
232
233 Register layout_info = field_offset;
234 load_unsigned_short(tmp1, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
235 ldr(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_holder_offset())));
236 inline_layout_info(tmp2, tmp1, layout_info);
237
238 flat_field_copy(IN_HEAP, r0, obj, layout_info);
239 b(done);
240
241 bind(slow_path);
242 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::write_flat_field), obj, r0, entry);
243 bind(done);
244 }
245
246 // Load object from cpool->resolved_references(index)
247 void InterpreterMacroAssembler::load_resolved_reference_at_index(
248 Register result, Register index, Register tmp) {
249 assert_different_registers(result, index);
250
251 get_constant_pool(result);
252 // load pointer for resolved_references[] objArray
253 ldr(result, Address(result, ConstantPool::cache_offset()));
254 ldr(result, Address(result, ConstantPoolCache::resolved_references_offset()));
255 resolve_oop_handle(result, tmp, rscratch2);
256 // Add in the index
257 add(index, index, arrayOopDesc::base_offset_in_bytes(T_OBJECT) >> LogBytesPerHeapOop);
258 load_heap_oop(result, Address(result, index, Address::uxtw(LogBytesPerHeapOop)), tmp, rscratch2);
259 }
260
261 void InterpreterMacroAssembler::load_resolved_klass_at_offset(
262 Register cpool, Register index, Register klass, Register temp) {
263 add(temp, cpool, index, LSL, LogBytesPerWord);
264 ldrh(temp, Address(temp, sizeof(ConstantPool))); // temp = resolved_klass_index
265 ldr(klass, Address(cpool, ConstantPool::resolved_klasses_offset())); // klass = cpool->_resolved_klasses
266 add(klass, klass, temp, LSL, LogBytesPerWord);
267 ldr(klass, Address(klass, Array<Klass*>::base_offset_in_bytes()));
268 }
269
270 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
271 // subtype of super_klass.
272 //
273 // Args:
274 // r0: superklass
275 // Rsub_klass: subklass
276 //
277 // Kills:
278 // r2
279 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
280 Label& ok_is_subtype,
281 bool profile) {
282 assert(Rsub_klass != r0, "r0 holds superklass");
283 assert(Rsub_klass != r2, "r2 holds 2ndary super array length");
284
285 // Profile the not-null value's klass.
286 if (profile) {
287 profile_typecheck(r2, Rsub_klass); // blows r2
288 }
289 // Do the check.
290 check_klass_subtype(Rsub_klass, r0, r2, ok_is_subtype); // blows r2
291 }
292
293 // Java Expression Stack
294
295 void InterpreterMacroAssembler::pop_ptr(Register r) {
296 ldr(r, post(esp, wordSize));
297 }
298
299 void InterpreterMacroAssembler::pop_i(Register r) {
300 ldrw(r, post(esp, wordSize));
301 }
302
303 void InterpreterMacroAssembler::pop_l(Register r) {
304 ldr(r, post(esp, 2 * Interpreter::stackElementSize));
305 }
306
307 void InterpreterMacroAssembler::push_ptr(Register r) {
308 str(r, pre(esp, -wordSize));
309 }
310
311 void InterpreterMacroAssembler::push_i(Register r) {
312 str(r, pre(esp, -wordSize));
313 }
314
315 void InterpreterMacroAssembler::push_l(Register r) {
316 str(zr, pre(esp, -wordSize));
317 str(r, pre(esp, - wordSize));
318 }
319
320 void InterpreterMacroAssembler::pop_f(FloatRegister r) {
321 ldrs(r, post(esp, wordSize));
322 }
323
324 void InterpreterMacroAssembler::pop_d(FloatRegister r) {
325 ldrd(r, post(esp, 2 * Interpreter::stackElementSize));
326 }
327
328 void InterpreterMacroAssembler::push_f(FloatRegister r) {
329 strs(r, pre(esp, -wordSize));
330 }
331
332 void InterpreterMacroAssembler::push_d(FloatRegister r) {
333 strd(r, pre(esp, 2* -wordSize));
334 }
335
336 void InterpreterMacroAssembler::pop(TosState state) {
337 switch (state) {
338 case atos: pop_ptr(); break;
339 case btos:
340 case ztos:
341 case ctos:
342 case stos:
343 case itos: pop_i(); break;
344 case ltos: pop_l(); break;
345 case ftos: pop_f(); break;
346 case dtos: pop_d(); break;
347 case vtos: /* nothing to do */ break;
348 default: ShouldNotReachHere();
349 }
350 interp_verify_oop(r0, state);
351 }
352
353 void InterpreterMacroAssembler::push(TosState state) {
354 interp_verify_oop(r0, state);
355 switch (state) {
356 case atos: push_ptr(); break;
357 case btos:
358 case ztos:
359 case ctos:
360 case stos:
361 case itos: push_i(); break;
362 case ltos: push_l(); break;
363 case ftos: push_f(); break;
364 case dtos: push_d(); break;
365 case vtos: /* nothing to do */ break;
366 default : ShouldNotReachHere();
367 }
368 }
369
370 // Helpers for swap and dup
371 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
372 ldr(val, Address(esp, Interpreter::expr_offset_in_bytes(n)));
373 }
374
375 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
376 str(val, Address(esp, Interpreter::expr_offset_in_bytes(n)));
377 }
378
379 void InterpreterMacroAssembler::load_float(Address src) {
380 ldrs(v0, src);
381 }
382
383 void InterpreterMacroAssembler::load_double(Address src) {
384 ldrd(v0, src);
385 }
386
387 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
388 // set sender sp
389 mov(r19_sender_sp, sp);
390 // record last_sp
391 sub(rscratch1, esp, rfp);
392 asr(rscratch1, rscratch1, Interpreter::logStackElementSize);
393 str(rscratch1, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
394 }
395
396 // Jump to from_interpreted entry of a call unless single stepping is possible
397 // in this thread in which case we must call the i2i entry
398 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
399 prepare_to_jump_from_interpreted();
400
401 if (JvmtiExport::can_post_interpreter_events()) {
402 Label run_compiled_code;
403 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
404 // compiled code in threads for which the event is enabled. Check here for
405 // interp_only_mode if these events CAN be enabled.
406 ldrw(rscratch1, Address(rthread, JavaThread::interp_only_mode_offset()));
407 cbzw(rscratch1, run_compiled_code);
408 ldr(rscratch1, Address(method, Method::interpreter_entry_offset()));
409 br(rscratch1);
410 bind(run_compiled_code);
411 }
412
413 ldr(rscratch1, Address(method, Method::from_interpreted_offset()));
414 br(rscratch1);
415 }
416
417 // The following two routines provide a hook so that an implementation
418 // can schedule the dispatch in two parts. amd64 does not do this.
419 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
420 }
421
422 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
423 dispatch_next(state, step);
424 }
425
426 void InterpreterMacroAssembler::dispatch_base(TosState state,
427 address* table,
428 bool verifyoop,
429 bool generate_poll) {
430 if (VerifyActivationFrameSize) {
431 Label L;
432 sub(rscratch2, rfp, esp);
433 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
434 subs(rscratch2, rscratch2, min_frame_size);
435 br(Assembler::GE, L);
436 stop("broken stack frame");
437 bind(L);
438 }
439 if (verifyoop) {
440 interp_verify_oop(r0, state);
441 }
442
443 Label safepoint;
444 address* const safepoint_table = Interpreter::safept_table(state);
445 bool needs_thread_local_poll = generate_poll && table != safepoint_table;
446
447 if (needs_thread_local_poll) {
448 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
449 ldr(rscratch2, Address(rthread, JavaThread::polling_word_offset()));
450 tbnz(rscratch2, exact_log2(SafepointMechanism::poll_bit()), safepoint);
451 }
452
453 if (table == Interpreter::dispatch_table(state)) {
454 addw(rscratch2, rscratch1, Interpreter::distance_from_dispatch_table(state));
455 ldr(rscratch2, Address(rdispatch, rscratch2, Address::uxtw(3)));
456 } else {
457 mov(rscratch2, (address)table);
458 ldr(rscratch2, Address(rscratch2, rscratch1, Address::uxtw(3)));
459 }
460 br(rscratch2);
461
462 if (needs_thread_local_poll) {
463 bind(safepoint);
464 lea(rscratch2, ExternalAddress((address)safepoint_table));
465 ldr(rscratch2, Address(rscratch2, rscratch1, Address::uxtw(3)));
466 br(rscratch2);
467 }
468 }
469
470 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
471 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
472 }
473
474 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
475 dispatch_base(state, Interpreter::normal_table(state));
476 }
477
478 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
479 dispatch_base(state, Interpreter::normal_table(state), false);
480 }
481
482
483 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
484 // load next bytecode
485 ldrb(rscratch1, Address(pre(rbcp, step)));
486 dispatch_base(state, Interpreter::dispatch_table(state), /*verifyoop*/true, generate_poll);
487 }
488
489 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
490 // load current bytecode
491 ldrb(rscratch1, Address(rbcp, 0));
492 dispatch_base(state, table);
493 }
494
495 // remove activation
496 //
497 // Unlock the receiver if this is a synchronized method.
498 // Unlock any Java monitors from synchronized blocks.
499 // Apply stack watermark barrier.
500 // Notify JVMTI.
501 // Remove the activation from the stack.
502 //
503 // If there are locked Java monitors
504 // If throw_monitor_exception
505 // throws IllegalMonitorStateException
506 // Else if install_monitor_exception
507 // installs IllegalMonitorStateException
508 // Else
509 // no error processing
510 void InterpreterMacroAssembler::remove_activation(TosState state,
511 bool throw_monitor_exception,
512 bool install_monitor_exception,
513 bool notify_jvmdi) {
514 // Note: Registers r3 xmm0 may be in use for the
515 // result check if synchronized method
516 Label unlocked, unlock, no_unlock;
517
518 #ifdef ASSERT
519 Label not_preempted;
520 ldr(rscratch1, Address(rthread, JavaThread::preempt_alternate_return_offset()));
521 cbz(rscratch1, not_preempted);
522 stop("remove_activation: should not have alternate return address set");
523 bind(not_preempted);
524 #endif /* ASSERT */
525
526 // get the value of _do_not_unlock_if_synchronized into r3
527 const Address do_not_unlock_if_synchronized(rthread,
528 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
529 ldrb(r3, do_not_unlock_if_synchronized);
530 strb(zr, do_not_unlock_if_synchronized); // reset the flag
531
532 // get method access flags
533 ldr(r1, Address(rfp, frame::interpreter_frame_method_offset * wordSize));
534 ldrh(r2, Address(r1, Method::access_flags_offset()));
535 tbz(r2, exact_log2(JVM_ACC_SYNCHRONIZED), unlocked);
536
537 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
538 // is set.
539 cbnz(r3, no_unlock);
540
541 // unlock monitor
542 push(state); // save result
543
544 // BasicObjectLock will be first in list, since this is a
545 // synchronized method. However, need to check that the object has
546 // not been unlocked by an explicit monitorexit bytecode.
547 const Address monitor(rfp, frame::interpreter_frame_initial_sp_offset *
548 wordSize - (int) sizeof(BasicObjectLock));
549 // We use c_rarg1 so that if we go slow path it will be the correct
550 // register for unlock_object to pass to VM directly
551 lea(c_rarg1, monitor); // address of first monitor
552
553 ldr(r0, Address(c_rarg1, BasicObjectLock::obj_offset()));
554 cbnz(r0, unlock);
555
556 pop(state);
557 if (throw_monitor_exception) {
558 // Entry already unlocked, need to throw exception
559 call_VM(noreg, CAST_FROM_FN_PTR(address,
560 InterpreterRuntime::throw_illegal_monitor_state_exception));
561 should_not_reach_here();
562 } else {
563 // Monitor already unlocked during a stack unroll. If requested,
564 // install an illegal_monitor_state_exception. Continue with
565 // stack unrolling.
566 if (install_monitor_exception) {
567 call_VM(noreg, CAST_FROM_FN_PTR(address,
568 InterpreterRuntime::new_illegal_monitor_state_exception));
569 }
570 b(unlocked);
571 }
572
573 bind(unlock);
574 unlock_object(c_rarg1);
575 pop(state);
576
577 // Check that for block-structured locking (i.e., that all locked
578 // objects has been unlocked)
579 bind(unlocked);
580
581 // r0: Might contain return value
582
583 // Check that all monitors are unlocked
584 {
585 Label loop, exception, entry, restart;
586 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
587 const Address monitor_block_top(
588 rfp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
589 const Address monitor_block_bot(
590 rfp, frame::interpreter_frame_initial_sp_offset * wordSize);
591
592 bind(restart);
593 // We use c_rarg1 so that if we go slow path it will be the correct
594 // register for unlock_object to pass to VM directly
595 ldr(c_rarg1, monitor_block_top); // derelativize pointer
596 lea(c_rarg1, Address(rfp, c_rarg1, Address::lsl(Interpreter::logStackElementSize)));
597 // c_rarg1 points to current entry, starting with top-most entry
598
599 lea(r19, monitor_block_bot); // points to word before bottom of
600 // monitor block
601 b(entry);
602
603 // Entry already locked, need to throw exception
604 bind(exception);
605
606 if (throw_monitor_exception) {
607 // Throw exception
608 MacroAssembler::call_VM(noreg,
609 CAST_FROM_FN_PTR(address, InterpreterRuntime::
610 throw_illegal_monitor_state_exception));
611 should_not_reach_here();
612 } else {
613 // Stack unrolling. Unlock object and install illegal_monitor_exception.
614 // Unlock does not block, so don't have to worry about the frame.
615 // We don't have to preserve c_rarg1 since we are going to throw an exception.
616
617 push(state);
618 unlock_object(c_rarg1);
619 pop(state);
620
621 if (install_monitor_exception) {
622 call_VM(noreg, CAST_FROM_FN_PTR(address,
623 InterpreterRuntime::
624 new_illegal_monitor_state_exception));
625 }
626
627 b(restart);
628 }
629
630 bind(loop);
631 // check if current entry is used
632 ldr(rscratch1, Address(c_rarg1, BasicObjectLock::obj_offset()));
633 cbnz(rscratch1, exception);
634
635 add(c_rarg1, c_rarg1, entry_size); // otherwise advance to next entry
636 bind(entry);
637 cmp(c_rarg1, r19); // check if bottom reached
638 br(Assembler::NE, loop); // if not at bottom then check this entry
639 }
640
641 bind(no_unlock);
642
643 JFR_ONLY(enter_jfr_critical_section();)
644
645 // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
646 // that would normally not be safe to use. Such bad returns into unsafe territory of
647 // the stack, will call InterpreterRuntime::at_unwind.
648 Label slow_path;
649 Label fast_path;
650 safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
651 br(Assembler::AL, fast_path);
652 bind(slow_path);
653 push(state);
654 set_last_Java_frame(esp, rfp, pc(), rscratch1);
655 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
656 reset_last_Java_frame(true);
657 pop(state);
658 bind(fast_path);
659
660 // JVMTI support. Make sure the safepoint poll test is issued prior.
661 if (notify_jvmdi) {
662 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
663 } else {
664 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
665 }
666
667 // remove activation
668 // get sender esp
669 ldr(rscratch2,
670 Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
671 if (StackReservedPages > 0) {
672 // testing if reserved zone needs to be re-enabled
673 Label no_reserved_zone_enabling;
674
675 // check if already enabled - if so no re-enabling needed
676 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
677 ldrw(rscratch1, Address(rthread, JavaThread::stack_guard_state_offset()));
678 cmpw(rscratch1, (u1)StackOverflow::stack_guard_enabled);
679 br(Assembler::EQ, no_reserved_zone_enabling);
680
681 // look for an overflow into the stack reserved zone, i.e.
682 // interpreter_frame_sender_sp <= JavaThread::reserved_stack_activation
683 ldr(rscratch1, Address(rthread, JavaThread::reserved_stack_activation_offset()));
684 cmp(rscratch2, rscratch1);
685 br(Assembler::LS, no_reserved_zone_enabling);
686
687 JFR_ONLY(leave_jfr_critical_section();)
688
689 call_VM_leaf(
690 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
691 call_VM(noreg, CAST_FROM_FN_PTR(address,
692 InterpreterRuntime::throw_delayed_StackOverflowError));
693 should_not_reach_here();
694
695 bind(no_reserved_zone_enabling);
696 }
697
698 if (state == atos && InlineTypeReturnedAsFields) {
699 Label skip;
700 Label not_null;
701 cbnz(r0, not_null);
702 // Returned value is null, zero all return registers because they may belong to oop fields
703 mov(j_rarg1, zr);
704 mov(j_rarg2, zr);
705 mov(j_rarg3, zr);
706 mov(j_rarg4, zr);
707 mov(j_rarg5, zr);
708 mov(j_rarg6, zr);
709 mov(j_rarg7, zr);
710 b(skip);
711 bind(not_null);
712
713 // Check if we are returning a non-null inline type and load its fields into registers
714 test_oop_is_not_inline_type(r0, rscratch2, skip, /* can_be_null= */ false);
715
716 // Load fields from a buffered value with an inline class specific handler
717 load_klass(rscratch1 /*dst*/, r0 /*src*/);
718 ldr(rscratch1, Address(rscratch1, InlineKlass::adr_members_offset()));
719 ldr(rscratch1, Address(rscratch1, InlineKlass::unpack_handler_offset()));
720 // Unpack handler can be null if inline type is not scalarizable in returns
721 cbz(rscratch1, skip);
722
723 blr(rscratch1);
724 bind(skip);
725 // Check above kills sender esp in rscratch2. Reload it.
726 ldr(rscratch2, Address(rfp, frame::interpreter_frame_sender_sp_offset * wordSize));
727 }
728
729 // remove frame anchor
730 leave();
731
732 JFR_ONLY(leave_jfr_critical_section();)
733
734 // restore sender esp
735 mov(esp, rscratch2);
736
737 // If we're returning to interpreted code we will shortly be
738 // adjusting SP to allow some space for ESP. If we're returning to
739 // compiled code the saved sender SP was saved in sender_sp, so this
740 // restores it.
741 andr(sp, esp, -16);
742 }
743
744 #if INCLUDE_JFR
745 void InterpreterMacroAssembler::enter_jfr_critical_section() {
746 const Address sampling_critical_section(rthread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
747 mov(rscratch1, true);
748 strb(rscratch1, sampling_critical_section);
749 }
750
751 void InterpreterMacroAssembler::leave_jfr_critical_section() {
752 const Address sampling_critical_section(rthread, in_bytes(SAMPLING_CRITICAL_SECTION_OFFSET_JFR));
753 strb(zr, sampling_critical_section);
754 }
755 #endif // INCLUDE_JFR
756
757 // Lock object
758 //
759 // Args:
760 // c_rarg1: BasicObjectLock to be used for locking
761 //
762 // Kills:
763 // r0
764 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, .. (param regs)
765 // rscratch1, rscratch2 (scratch regs)
766 void InterpreterMacroAssembler::lock_object(Register lock_reg)
767 {
768 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
769
770 const Register tmp = c_rarg2;
771 const Register obj_reg = c_rarg3; // Will contain the oop
772 const Register tmp2 = c_rarg4;
773 const Register tmp3 = c_rarg5;
774
775 // Load object pointer into obj_reg %c_rarg3
776 ldr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
777
778 Label slow_case, done;
779 fast_lock(lock_reg, obj_reg, tmp, tmp2, tmp3, slow_case);
780 b(done);
781
782 bind(slow_case);
783
784 // Call the runtime routine for slow case
785 call_VM_preemptable(noreg,
786 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
787 lock_reg);
788
789 bind(done);
790 }
791
792
793 // Unlocks an object. Used in monitorexit bytecode and
794 // remove_activation. Throws an IllegalMonitorException if object is
795 // not locked by current thread.
796 //
797 // Args:
798 // c_rarg1: BasicObjectLock for lock
799 //
800 // Kills:
801 // r0
802 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
803 // rscratch1, rscratch2 (scratch regs)
804 void InterpreterMacroAssembler::unlock_object(Register lock_reg)
805 {
806 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1");
807
808 const Register swap_reg = r0;
809 const Register header_reg = c_rarg2; // Will contain the old oopMark
810 const Register obj_reg = c_rarg3; // Will contain the oop
811 const Register tmp_reg = c_rarg4; // Temporary used by fast_unlock
812
813 save_bcp(); // Save in case of exception
814
815 // Load oop into obj_reg(%c_rarg3)
816 ldr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
817
818 // Free entry
819 str(zr, Address(lock_reg, BasicObjectLock::obj_offset()));
820
821 Label slow_case, done;
822 fast_unlock(obj_reg, header_reg, swap_reg, tmp_reg, slow_case);
823 b(done);
824
825 bind(slow_case);
826 // Call the runtime routine for slow case.
827 str(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset())); // restore obj
828 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
829 bind(done);
830 restore_bcp();
831 }
832
833 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
834 Label& zero_continue) {
835 assert(ProfileInterpreter, "must be profiling interpreter");
836 ldr(mdp, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
837 cbz(mdp, zero_continue);
838 }
839
840 // Set the method data pointer for the current bcp.
841 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
842 assert(ProfileInterpreter, "must be profiling interpreter");
843 Label set_mdp;
844 stp(r0, r1, Address(pre(sp, -2 * wordSize)));
845
846 // Test MDO to avoid the call if it is null.
847 ldr(r0, Address(rmethod, in_bytes(Method::method_data_offset())));
848 cbz(r0, set_mdp);
849 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rmethod, rbcp);
850 // r0: mdi
851 // mdo is guaranteed to be non-zero here, we checked for it before the call.
852 ldr(r1, Address(rmethod, in_bytes(Method::method_data_offset())));
853 lea(r1, Address(r1, in_bytes(MethodData::data_offset())));
854 add(r0, r1, r0);
855 str(r0, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
856 bind(set_mdp);
857 ldp(r0, r1, Address(post(sp, 2 * wordSize)));
858 }
859
860 void InterpreterMacroAssembler::verify_method_data_pointer() {
861 assert(ProfileInterpreter, "must be profiling interpreter");
862 #ifdef ASSERT
863 Label verify_continue;
864 stp(r0, r1, Address(pre(sp, -2 * wordSize)));
865 stp(r2, r3, Address(pre(sp, -2 * wordSize)));
866 test_method_data_pointer(r3, verify_continue); // If mdp is zero, continue
867 get_method(r1);
868
869 // If the mdp is valid, it will point to a DataLayout header which is
870 // consistent with the bcp. The converse is highly probable also.
871 ldrsh(r2, Address(r3, in_bytes(DataLayout::bci_offset())));
872 ldr(rscratch1, Address(r1, Method::const_offset()));
873 add(r2, r2, rscratch1, Assembler::LSL);
874 lea(r2, Address(r2, ConstMethod::codes_offset()));
875 cmp(r2, rbcp);
876 br(Assembler::EQ, verify_continue);
877 // r1: method
878 // rbcp: bcp // rbcp == 22
879 // r3: mdp
880 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
881 r1, rbcp, r3);
882 bind(verify_continue);
883 ldp(r2, r3, Address(post(sp, 2 * wordSize)));
884 ldp(r0, r1, Address(post(sp, 2 * wordSize)));
885 #endif // ASSERT
886 }
887
888
889 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
890 int constant,
891 Register value) {
892 assert(ProfileInterpreter, "must be profiling interpreter");
893 Address data(mdp_in, constant);
894 str(value, data);
895 }
896
897
898 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
899 int constant) {
900 increment_mdp_data_at(mdp_in, noreg, constant);
901 }
902
903 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
904 Register index,
905 int constant) {
906 assert(ProfileInterpreter, "must be profiling interpreter");
907
908 assert_different_registers(rscratch2, rscratch1, mdp_in, index);
909
910 Address addr1(mdp_in, constant);
911 Address addr2(rscratch2, index, Address::lsl(0));
912 Address &addr = addr1;
913 if (index != noreg) {
914 lea(rscratch2, addr1);
915 addr = addr2;
916 }
917
918 increment(addr, DataLayout::counter_increment);
919 }
920
921 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
922 int flag_byte_constant) {
923 assert(ProfileInterpreter, "must be profiling interpreter");
924 int flags_offset = in_bytes(DataLayout::flags_offset());
925 // Set the flag
926 ldrb(rscratch1, Address(mdp_in, flags_offset));
927 orr(rscratch1, rscratch1, flag_byte_constant);
928 strb(rscratch1, Address(mdp_in, flags_offset));
929 }
930
931
932 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
933 int offset,
934 Register value,
935 Register test_value_out,
936 Label& not_equal_continue) {
937 assert(ProfileInterpreter, "must be profiling interpreter");
938 if (test_value_out == noreg) {
939 ldr(rscratch1, Address(mdp_in, offset));
940 cmp(value, rscratch1);
941 } else {
942 // Put the test value into a register, so caller can use it:
943 ldr(test_value_out, Address(mdp_in, offset));
944 cmp(value, test_value_out);
945 }
946 br(Assembler::NE, not_equal_continue);
947 }
948
949
950 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
951 int offset_of_disp) {
952 assert(ProfileInterpreter, "must be profiling interpreter");
953 ldr(rscratch1, Address(mdp_in, offset_of_disp));
954 add(mdp_in, mdp_in, rscratch1, LSL);
955 str(mdp_in, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
956 }
957
958
959 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
960 Register reg,
961 int offset_of_disp) {
962 assert(ProfileInterpreter, "must be profiling interpreter");
963 lea(rscratch1, Address(mdp_in, offset_of_disp));
964 ldr(rscratch1, Address(rscratch1, reg, Address::lsl(0)));
965 add(mdp_in, mdp_in, rscratch1, LSL);
966 str(mdp_in, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
967 }
968
969
970 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
971 int constant) {
972 assert(ProfileInterpreter, "must be profiling interpreter");
973 add(mdp_in, mdp_in, (unsigned)constant);
974 str(mdp_in, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
975 }
976
977
978 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
979 assert(ProfileInterpreter, "must be profiling interpreter");
980 // save/restore across call_VM
981 stp(zr, return_bci, Address(pre(sp, -2 * wordSize)));
982 call_VM(noreg,
983 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
984 return_bci);
985 ldp(zr, return_bci, Address(post(sp, 2 * wordSize)));
986 }
987
988
989 void InterpreterMacroAssembler::profile_taken_branch(Register mdp) {
990 if (ProfileInterpreter) {
991 Label profile_continue;
992
993 // If no method data exists, go to profile_continue.
994 test_method_data_pointer(mdp, profile_continue);
995
996 // We are taking a branch. Increment the taken count.
997 increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
998
999 // The method data pointer needs to be updated to reflect the new target.
1000 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1001 bind(profile_continue);
1002 }
1003 }
1004
1005
1006 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp, bool acmp) {
1007 if (ProfileInterpreter) {
1008 Label profile_continue;
1009
1010 // If no method data exists, go to profile_continue.
1011 test_method_data_pointer(mdp, profile_continue);
1012
1013 // We are not taking a branch. Increment the not taken count.
1014 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1015
1016 // The method data pointer needs to be updated to correspond to
1017 // the next bytecode
1018 update_mdp_by_constant(mdp, acmp ? in_bytes(ACmpData::acmp_data_size()) : in_bytes(BranchData::branch_data_size()));
1019 bind(profile_continue);
1020 }
1021 }
1022
1023
1024 void InterpreterMacroAssembler::profile_call(Register mdp) {
1025 if (ProfileInterpreter) {
1026 Label profile_continue;
1027
1028 // If no method data exists, go to profile_continue.
1029 test_method_data_pointer(mdp, profile_continue);
1030
1031 // We are making a call. Increment the count.
1032 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1033
1034 // The method data pointer needs to be updated to reflect the new target.
1035 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1036 bind(profile_continue);
1037 }
1038 }
1039
1040 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1041 if (ProfileInterpreter) {
1042 Label profile_continue;
1043
1044 // If no method data exists, go to profile_continue.
1045 test_method_data_pointer(mdp, profile_continue);
1046
1047 // We are making a call. Increment the count.
1048 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1049
1050 // The method data pointer needs to be updated to reflect the new target.
1051 update_mdp_by_constant(mdp,
1052 in_bytes(VirtualCallData::
1053 virtual_call_data_size()));
1054 bind(profile_continue);
1055 }
1056 }
1057
1058
1059 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1060 Register mdp) {
1061 if (ProfileInterpreter) {
1062 Label profile_continue;
1063
1064 // If no method data exists, go to profile_continue.
1065 test_method_data_pointer(mdp, profile_continue);
1066
1067 // Record the receiver type.
1068 profile_receiver_type(receiver, mdp, 0);
1069
1070 // The method data pointer needs to be updated to reflect the new target.
1071 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1072 bind(profile_continue);
1073 }
1074 }
1075
1076 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1077 Register mdp) {
1078 if (ProfileInterpreter) {
1079 Label profile_continue;
1080 uint row;
1081
1082 // If no method data exists, go to profile_continue.
1083 test_method_data_pointer(mdp, profile_continue);
1084
1085 // Update the total ret count.
1086 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1087
1088 for (row = 0; row < RetData::row_limit(); row++) {
1089 Label next_test;
1090
1091 // See if return_bci is equal to bci[n]:
1092 test_mdp_data_at(mdp,
1093 in_bytes(RetData::bci_offset(row)),
1094 return_bci, noreg,
1095 next_test);
1096
1097 // return_bci is equal to bci[n]. Increment the count.
1098 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1099
1100 // The method data pointer needs to be updated to reflect the new target.
1101 update_mdp_by_offset(mdp,
1102 in_bytes(RetData::bci_displacement_offset(row)));
1103 b(profile_continue);
1104 bind(next_test);
1105 }
1106
1107 update_mdp_for_ret(return_bci);
1108
1109 bind(profile_continue);
1110 }
1111 }
1112
1113 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1114 if (ProfileInterpreter) {
1115 Label profile_continue;
1116
1117 // If no method data exists, go to profile_continue.
1118 test_method_data_pointer(mdp, profile_continue);
1119
1120 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1121
1122 // The method data pointer needs to be updated.
1123 int mdp_delta = in_bytes(BitData::bit_data_size());
1124 if (TypeProfileCasts) {
1125 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1126 }
1127 update_mdp_by_constant(mdp, mdp_delta);
1128
1129 bind(profile_continue);
1130 }
1131 }
1132
1133 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass) {
1134 if (ProfileInterpreter) {
1135 Label profile_continue;
1136
1137 // If no method data exists, go to profile_continue.
1138 test_method_data_pointer(mdp, profile_continue);
1139
1140 // The method data pointer needs to be updated.
1141 int mdp_delta = in_bytes(BitData::bit_data_size());
1142 if (TypeProfileCasts) {
1143 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1144
1145 // Record the object type.
1146 profile_receiver_type(klass, mdp, 0);
1147 }
1148 update_mdp_by_constant(mdp, mdp_delta);
1149
1150 bind(profile_continue);
1151 }
1152 }
1153
1154 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1155 if (ProfileInterpreter) {
1156 Label profile_continue;
1157
1158 // If no method data exists, go to profile_continue.
1159 test_method_data_pointer(mdp, profile_continue);
1160
1161 // Update the default case count
1162 increment_mdp_data_at(mdp,
1163 in_bytes(MultiBranchData::default_count_offset()));
1164
1165 // The method data pointer needs to be updated.
1166 update_mdp_by_offset(mdp,
1167 in_bytes(MultiBranchData::
1168 default_displacement_offset()));
1169
1170 bind(profile_continue);
1171 }
1172 }
1173
1174 void InterpreterMacroAssembler::profile_switch_case(Register index,
1175 Register mdp,
1176 Register reg2) {
1177 if (ProfileInterpreter) {
1178 Label profile_continue;
1179
1180 // If no method data exists, go to profile_continue.
1181 test_method_data_pointer(mdp, profile_continue);
1182
1183 // Build the base (index * per_case_size_in_bytes()) +
1184 // case_array_offset_in_bytes()
1185 movw(reg2, in_bytes(MultiBranchData::per_case_size()));
1186 movw(rscratch1, in_bytes(MultiBranchData::case_array_offset()));
1187 Assembler::maddw(index, index, reg2, rscratch1);
1188
1189 // Update the case count
1190 increment_mdp_data_at(mdp,
1191 index,
1192 in_bytes(MultiBranchData::relative_count_offset()));
1193
1194 // The method data pointer needs to be updated.
1195 update_mdp_by_offset(mdp,
1196 index,
1197 in_bytes(MultiBranchData::
1198 relative_displacement_offset()));
1199
1200 bind(profile_continue);
1201 }
1202 }
1203
1204 template <class ArrayData> void InterpreterMacroAssembler::profile_array_type(Register mdp,
1205 Register array,
1206 Register tmp) {
1207 if (ProfileInterpreter) {
1208 Label profile_continue;
1209
1210 // If no method data exists, go to profile_continue.
1211 test_method_data_pointer(mdp, profile_continue);
1212
1213 mov(tmp, array);
1214 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayData::array_offset())));
1215
1216 Label not_flat;
1217 test_non_flat_array_oop(array, tmp, not_flat);
1218
1219 set_mdp_flag_at(mdp, ArrayData::flat_array_byte_constant());
1220
1221 bind(not_flat);
1222
1223 Label not_null_free;
1224 test_non_null_free_array_oop(array, tmp, not_null_free);
1225
1226 set_mdp_flag_at(mdp, ArrayData::null_free_array_byte_constant());
1227
1228 bind(not_null_free);
1229
1230 bind(profile_continue);
1231 }
1232 }
1233
1234 template void InterpreterMacroAssembler::profile_array_type<ArrayLoadData>(Register mdp,
1235 Register array,
1236 Register tmp);
1237 template void InterpreterMacroAssembler::profile_array_type<ArrayStoreData>(Register mdp,
1238 Register array,
1239 Register tmp);
1240
1241 void InterpreterMacroAssembler::profile_multiple_element_types(Register mdp, Register element, Register tmp, const Register tmp2) {
1242 if (ProfileInterpreter) {
1243 Label profile_continue;
1244
1245 // If no method data exists, go to profile_continue.
1246 test_method_data_pointer(mdp, profile_continue);
1247
1248 Label done, update;
1249 cbnz(element, update);
1250 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1251 b(done);
1252
1253 bind(update);
1254 load_klass(tmp, element);
1255
1256 // Record the object type.
1257 profile_receiver_type(tmp, mdp, 0);
1258
1259 bind(done);
1260
1261 // The method data pointer needs to be updated.
1262 update_mdp_by_constant(mdp, in_bytes(ArrayStoreData::array_store_data_size()));
1263
1264 bind(profile_continue);
1265 }
1266 }
1267
1268
1269 void InterpreterMacroAssembler::profile_element_type(Register mdp,
1270 Register element,
1271 Register tmp) {
1272 if (ProfileInterpreter) {
1273 Label profile_continue;
1274
1275 // If no method data exists, go to profile_continue.
1276 test_method_data_pointer(mdp, profile_continue);
1277
1278 mov(tmp, element);
1279 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadData::element_offset())));
1280
1281 // The method data pointer needs to be updated.
1282 update_mdp_by_constant(mdp, in_bytes(ArrayLoadData::array_load_data_size()));
1283
1284 bind(profile_continue);
1285 }
1286 }
1287
1288 void InterpreterMacroAssembler::profile_acmp(Register mdp,
1289 Register left,
1290 Register right,
1291 Register tmp) {
1292 if (ProfileInterpreter) {
1293 Label profile_continue;
1294
1295 // If no method data exists, go to profile_continue.
1296 test_method_data_pointer(mdp, profile_continue);
1297
1298 mov(tmp, left);
1299 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::left_offset())));
1300
1301 Label left_not_inline_type;
1302 test_oop_is_not_inline_type(left, tmp, left_not_inline_type);
1303 set_mdp_flag_at(mdp, ACmpData::left_inline_type_byte_constant());
1304 bind(left_not_inline_type);
1305
1306 mov(tmp, right);
1307 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::right_offset())));
1308
1309 Label right_not_inline_type;
1310 test_oop_is_not_inline_type(right, tmp, right_not_inline_type);
1311 set_mdp_flag_at(mdp, ACmpData::right_inline_type_byte_constant());
1312 bind(right_not_inline_type);
1313
1314 bind(profile_continue);
1315 }
1316 }
1317
1318 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1319 if (state == atos) {
1320 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1321 }
1322 }
1323
1324 void InterpreterMacroAssembler::notify_method_entry() {
1325 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1326 // track stack depth. If it is possible to enter interp_only_mode we add
1327 // the code to check if the event should be sent.
1328 if (JvmtiExport::can_post_interpreter_events()) {
1329 Label L;
1330 ldrw(r3, Address(rthread, JavaThread::interp_only_mode_offset()));
1331 cbzw(r3, L);
1332 call_VM(noreg, CAST_FROM_FN_PTR(address,
1333 InterpreterRuntime::post_method_entry));
1334 bind(L);
1335 }
1336
1337 if (DTraceMethodProbes) {
1338 get_method(c_rarg1);
1339 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1340 rthread, c_rarg1);
1341 }
1342
1343 // RedefineClasses() tracing support for obsolete method entry
1344 if (log_is_enabled(Trace, redefine, class, obsolete)) {
1345 get_method(c_rarg1);
1346 call_VM_leaf(
1347 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1348 rthread, c_rarg1);
1349 }
1350
1351 }
1352
1353
1354 void InterpreterMacroAssembler::notify_method_exit(
1355 TosState state, NotifyMethodExitMode mode) {
1356 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1357 // track stack depth. If it is possible to enter interp_only_mode we add
1358 // the code to check if the event should be sent.
1359 if (mode == NotifyJVMTI && (JvmtiExport::can_post_interpreter_events() || JvmtiExport::can_post_frame_pop())) {
1360 Label L;
1361 // Note: frame::interpreter_frame_result has a dependency on how the
1362 // method result is saved across the call to post_method_exit. If this
1363 // is changed then the interpreter_frame_result implementation will
1364 // need to be updated too.
1365
1366 // template interpreter will leave the result on the top of the stack.
1367 push(state);
1368
1369 ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset()));
1370 cbz(rscratch1, L); // if (thread->jvmti_thread_state() == nullptr) exit;
1371
1372 ldrw(rscratch1, Address(rscratch1, JvmtiThreadState::frame_pop_cnt_offset()));
1373 ldrw(rscratch2, Address(rthread, JavaThread::interp_only_mode_offset()));
1374 orrw(rscratch1, rscratch1, rscratch2);
1375 cbzw(rscratch1, L);
1376
1377 call_VM(noreg,
1378 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1379 bind(L);
1380 pop(state);
1381 }
1382
1383 if (DTraceMethodProbes) {
1384 push(state);
1385 get_method(c_rarg1);
1386 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1387 rthread, c_rarg1);
1388 pop(state);
1389 }
1390 }
1391
1392
1393 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1394 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1395 int increment, Address mask,
1396 Register scratch, Register scratch2,
1397 bool preloaded, Condition cond,
1398 Label* where) {
1399 if (!preloaded) {
1400 ldrw(scratch, counter_addr);
1401 }
1402 add(scratch, scratch, increment);
1403 strw(scratch, counter_addr);
1404 ldrw(scratch2, mask);
1405 ands(scratch, scratch, scratch2);
1406 br(cond, *where);
1407 }
1408
1409 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
1410 int number_of_arguments) {
1411 // interpreter specific
1412 //
1413 // Note: No need to save/restore rbcp & rlocals pointer since these
1414 // are callee saved registers and no blocking/ GC can happen
1415 // in leaf calls.
1416 #ifdef ASSERT
1417 {
1418 Label L;
1419 ldr(rscratch1, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1420 cbz(rscratch1, L);
1421 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
1422 " last_sp != nullptr");
1423 bind(L);
1424 }
1425 #endif /* ASSERT */
1426 // super call
1427 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
1428 }
1429
1430 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
1431 Register java_thread,
1432 Register last_java_sp,
1433 Label* return_pc,
1434 address entry_point,
1435 int number_of_arguments,
1436 bool check_exceptions) {
1437 // interpreter specific
1438 //
1439 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
1440 // really make a difference for these runtime calls, since they are
1441 // slow anyway. Btw., bcp must be saved/restored since it may change
1442 // due to GC.
1443 // assert(java_thread == noreg , "not expecting a precomputed java thread");
1444 save_bcp();
1445 #ifdef ASSERT
1446 {
1447 Label L;
1448 ldr(rscratch1, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1449 cbz(rscratch1, L);
1450 stop("InterpreterMacroAssembler::call_VM_base:"
1451 " last_sp != nullptr");
1452 bind(L);
1453 }
1454 #endif /* ASSERT */
1455 // super call
1456 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
1457 return_pc, entry_point,
1458 number_of_arguments, check_exceptions);
1459 // interpreter specific
1460 restore_bcp();
1461 restore_locals();
1462 }
1463
1464 void InterpreterMacroAssembler::call_VM_preemptable_helper(Register oop_result,
1465 address entry_point,
1466 int number_of_arguments,
1467 bool check_exceptions) {
1468 assert(InterpreterRuntime::is_preemptable_call(entry_point), "VM call not preemptable, should use call_VM()");
1469 Label resume_pc, not_preempted;
1470
1471 #ifdef ASSERT
1472 {
1473 Label L1, L2;
1474 ldr(rscratch1, Address(rthread, JavaThread::preempt_alternate_return_offset()));
1475 cbz(rscratch1, L1);
1476 stop("call_VM_preemptable_helper: Should not have alternate return address set");
1477 bind(L1);
1478 // We check this counter in patch_return_pc_with_preempt_stub() during freeze.
1479 incrementw(Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
1480 ldrw(rscratch1, Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
1481 cmpw(rscratch1, 0);
1482 br(Assembler::GT, L2);
1483 stop("call_VM_preemptable_helper: should be > 0");
1484 bind(L2);
1485 }
1486 #endif /* ASSERT */
1487
1488 // Force freeze slow path.
1489 push_cont_fastpath();
1490
1491 // Make VM call. In case of preemption set last_pc to the one we want to resume to.
1492 // Note: call_VM_base will use resume_pc label to set last_Java_pc.
1493 call_VM_base(noreg, noreg, noreg, &resume_pc, entry_point, number_of_arguments, false /*check_exceptions*/);
1494
1495 pop_cont_fastpath();
1496
1497 #ifdef ASSERT
1498 {
1499 Label L;
1500 decrementw(Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
1501 ldrw(rscratch1, Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
1502 cmpw(rscratch1, 0);
1503 br(Assembler::GE, L);
1504 stop("call_VM_preemptable_helper: should be >= 0");
1505 bind(L);
1506 }
1507 #endif /* ASSERT */
1508
1509 // Check if preempted.
1510 ldr(rscratch1, Address(rthread, JavaThread::preempt_alternate_return_offset()));
1511 cbz(rscratch1, not_preempted);
1512 str(zr, Address(rthread, JavaThread::preempt_alternate_return_offset()));
1513 br(rscratch1);
1514
1515 // In case of preemption, this is where we will resume once we finally acquire the monitor.
1516 bind(resume_pc);
1517 restore_after_resume(false /* is_native */);
1518
1519 bind(not_preempted);
1520 if (check_exceptions) {
1521 // check for pending exceptions
1522 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
1523 Label ok;
1524 cbz(rscratch1, ok);
1525 lea(rscratch1, RuntimeAddress(StubRoutines::forward_exception_entry()));
1526 br(rscratch1);
1527 bind(ok);
1528 }
1529
1530 // get oop result if there is one and reset the value in the thread
1531 if (oop_result->is_valid()) {
1532 get_vm_result_oop(oop_result, rthread);
1533 }
1534 }
1535
1536 static void pass_arg1(MacroAssembler* masm, Register arg) {
1537 if (c_rarg1 != arg ) {
1538 masm->mov(c_rarg1, arg);
1539 }
1540 }
1541
1542 static void pass_arg2(MacroAssembler* masm, Register arg) {
1543 if (c_rarg2 != arg ) {
1544 masm->mov(c_rarg2, arg);
1545 }
1546 }
1547
1548 void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result,
1549 address entry_point,
1550 Register arg_1,
1551 bool check_exceptions) {
1552 pass_arg1(this, arg_1);
1553 call_VM_preemptable_helper(oop_result, entry_point, 1, check_exceptions);
1554 }
1555
1556 void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result,
1557 address entry_point,
1558 Register arg_1,
1559 Register arg_2,
1560 bool check_exceptions) {
1561 LP64_ONLY(assert_different_registers(arg_1, c_rarg2));
1562 pass_arg2(this, arg_2);
1563 pass_arg1(this, arg_1);
1564 call_VM_preemptable_helper(oop_result, entry_point, 2, check_exceptions);
1565 }
1566
1567 void InterpreterMacroAssembler::restore_after_resume(bool is_native) {
1568 lea(rscratch1, ExternalAddress(Interpreter::cont_resume_interpreter_adapter()));
1569 blr(rscratch1);
1570 if (is_native) {
1571 // On resume we need to set up stack as expected
1572 push(dtos);
1573 push(ltos);
1574 }
1575 }
1576
1577 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
1578 assert_different_registers(obj, rscratch1, mdo_addr.base(), mdo_addr.index());
1579 Label update, next, none;
1580
1581 verify_oop(obj);
1582
1583 cbnz(obj, update);
1584 orptr(mdo_addr, TypeEntries::null_seen);
1585 b(next);
1586
1587 bind(update);
1588 load_klass(obj, obj);
1589
1590 ldr(rscratch1, mdo_addr);
1591 eor(obj, obj, rscratch1);
1592 tst(obj, TypeEntries::type_klass_mask);
1593 br(Assembler::EQ, next); // klass seen before, nothing to
1594 // do. The unknown bit may have been
1595 // set already but no need to check.
1596
1597 tbnz(obj, exact_log2(TypeEntries::type_unknown), next);
1598 // already unknown. Nothing to do anymore.
1599
1600 cbz(rscratch1, none);
1601 cmp(rscratch1, (u1)TypeEntries::null_seen);
1602 br(Assembler::EQ, none);
1603 // There is a chance that the checks above
1604 // fail if another thread has just set the
1605 // profiling to this obj's klass
1606 eor(obj, obj, rscratch1); // get back original value before XOR
1607 ldr(rscratch1, mdo_addr);
1608 eor(obj, obj, rscratch1);
1609 tst(obj, TypeEntries::type_klass_mask);
1610 br(Assembler::EQ, next);
1611
1612 // different than before. Cannot keep accurate profile.
1613 orptr(mdo_addr, TypeEntries::type_unknown);
1614 b(next);
1615
1616 bind(none);
1617 // first time here. Set profile type.
1618 str(obj, mdo_addr);
1619 #ifdef ASSERT
1620 andr(obj, obj, TypeEntries::type_mask);
1621 verify_klass_ptr(obj);
1622 #endif
1623
1624 bind(next);
1625 }
1626
1627 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
1628 if (!ProfileInterpreter) {
1629 return;
1630 }
1631
1632 if (MethodData::profile_arguments() || MethodData::profile_return()) {
1633 Label profile_continue;
1634
1635 test_method_data_pointer(mdp, profile_continue);
1636
1637 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
1638
1639 ldrb(rscratch1, Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start));
1640 cmp(rscratch1, u1(is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag));
1641 br(Assembler::NE, profile_continue);
1642
1643 if (MethodData::profile_arguments()) {
1644 Label done;
1645 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
1646
1647 for (int i = 0; i < TypeProfileArgsLimit; i++) {
1648 if (i > 0 || MethodData::profile_return()) {
1649 // If return value type is profiled we may have no argument to profile
1650 ldr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())));
1651 sub(tmp, tmp, i*TypeStackSlotEntries::per_arg_count());
1652 cmp(tmp, (u1)TypeStackSlotEntries::per_arg_count());
1653 add(rscratch1, mdp, off_to_args);
1654 br(Assembler::LT, done);
1655 }
1656 ldr(tmp, Address(callee, Method::const_offset()));
1657 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
1658 // stack offset o (zero based) from the start of the argument
1659 // list, for n arguments translates into offset n - o - 1 from
1660 // the end of the argument list
1661 ldr(rscratch1, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))));
1662 sub(tmp, tmp, rscratch1);
1663 sub(tmp, tmp, 1);
1664 Address arg_addr = argument_address(tmp);
1665 ldr(tmp, arg_addr);
1666
1667 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i)));
1668 profile_obj_type(tmp, mdo_arg_addr);
1669
1670 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
1671 off_to_args += to_add;
1672 }
1673
1674 if (MethodData::profile_return()) {
1675 ldr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())));
1676 sub(tmp, tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
1677 }
1678
1679 add(rscratch1, mdp, off_to_args);
1680 bind(done);
1681 mov(mdp, rscratch1);
1682
1683 if (MethodData::profile_return()) {
1684 // We're right after the type profile for the last
1685 // argument. tmp is the number of cells left in the
1686 // CallTypeData/VirtualCallTypeData to reach its end. Non null
1687 // if there's a return to profile.
1688 assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
1689 add(mdp, mdp, tmp, LSL, exact_log2(DataLayout::cell_size));
1690 }
1691 str(mdp, Address(rfp, frame::interpreter_frame_mdp_offset * wordSize));
1692 } else {
1693 assert(MethodData::profile_return(), "either profile call args or call ret");
1694 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
1695 }
1696
1697 // mdp points right after the end of the
1698 // CallTypeData/VirtualCallTypeData, right after the cells for the
1699 // return value type if there's one
1700
1701 bind(profile_continue);
1702 }
1703 }
1704
1705 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
1706 assert_different_registers(mdp, ret, tmp, rbcp);
1707 if (ProfileInterpreter && MethodData::profile_return()) {
1708 Label profile_continue, done;
1709
1710 test_method_data_pointer(mdp, profile_continue);
1711
1712 if (MethodData::profile_return_jsr292_only()) {
1713 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
1714
1715 // If we don't profile all invoke bytecodes we must make sure
1716 // it's a bytecode we indeed profile. We can't go back to the
1717 // beginning of the ProfileData we intend to update to check its
1718 // type because we're right after it and we don't known its
1719 // length
1720 Label do_profile;
1721 ldrb(rscratch1, Address(rbcp, 0));
1722 cmp(rscratch1, (u1)Bytecodes::_invokedynamic);
1723 br(Assembler::EQ, do_profile);
1724 cmp(rscratch1, (u1)Bytecodes::_invokehandle);
1725 br(Assembler::EQ, do_profile);
1726 get_method(tmp);
1727 ldrh(rscratch1, Address(tmp, Method::intrinsic_id_offset()));
1728 subs(zr, rscratch1, static_cast<int>(vmIntrinsics::_compiledLambdaForm));
1729 br(Assembler::NE, profile_continue);
1730
1731 bind(do_profile);
1732 }
1733
1734 Address mdo_ret_addr(mdp, -in_bytes(SingleTypeEntry::size()));
1735 mov(tmp, ret);
1736 profile_obj_type(tmp, mdo_ret_addr);
1737
1738 bind(profile_continue);
1739 }
1740 }
1741
1742 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
1743 assert_different_registers(rscratch1, rscratch2, mdp, tmp1, tmp2);
1744 if (ProfileInterpreter && MethodData::profile_parameters()) {
1745 Label profile_continue, done;
1746
1747 test_method_data_pointer(mdp, profile_continue);
1748
1749 // Load the offset of the area within the MDO used for
1750 // parameters. If it's negative we're not profiling any parameters
1751 ldrw(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
1752 tbnz(tmp1, 31, profile_continue); // i.e. sign bit set
1753
1754 // Compute a pointer to the area for parameters from the offset
1755 // and move the pointer to the slot for the last
1756 // parameters. Collect profiling from last parameter down.
1757 // mdo start + parameters offset + array length - 1
1758 add(mdp, mdp, tmp1);
1759 ldr(tmp1, Address(mdp, ArrayData::array_len_offset()));
1760 sub(tmp1, tmp1, TypeStackSlotEntries::per_arg_count());
1761
1762 Label loop;
1763 bind(loop);
1764
1765 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
1766 int type_base = in_bytes(ParametersTypeData::type_offset(0));
1767 int per_arg_scale = exact_log2(DataLayout::cell_size);
1768 add(rscratch1, mdp, off_base);
1769 add(rscratch2, mdp, type_base);
1770
1771 Address arg_off(rscratch1, tmp1, Address::lsl(per_arg_scale));
1772 Address arg_type(rscratch2, tmp1, Address::lsl(per_arg_scale));
1773
1774 // load offset on the stack from the slot for this parameter
1775 ldr(tmp2, arg_off);
1776 neg(tmp2, tmp2);
1777 // read the parameter from the local area
1778 ldr(tmp2, Address(rlocals, tmp2, Address::lsl(Interpreter::logStackElementSize)));
1779
1780 // profile the parameter
1781 profile_obj_type(tmp2, arg_type);
1782
1783 // go to next parameter
1784 subs(tmp1, tmp1, TypeStackSlotEntries::per_arg_count());
1785 br(Assembler::GE, loop);
1786
1787 bind(profile_continue);
1788 }
1789 }
1790
1791 void InterpreterMacroAssembler::load_resolved_indy_entry(Register cache, Register index) {
1792 // Get index out of bytecode pointer, get_cache_entry_pointer_at_bcp
1793 get_cache_index_at_bcp(index, 1, sizeof(u4));
1794 // Get address of invokedynamic array
1795 ldr(cache, Address(rcpool, in_bytes(ConstantPoolCache::invokedynamic_entries_offset())));
1796 // Scale the index to be the entry index * sizeof(ResolvedIndyEntry)
1797 lsl(index, index, log2i_exact(sizeof(ResolvedIndyEntry)));
1798 add(cache, cache, Array<ResolvedIndyEntry>::base_offset_in_bytes());
1799 lea(cache, Address(cache, index));
1800 }
1801
1802 void InterpreterMacroAssembler::load_field_entry(Register cache, Register index, int bcp_offset) {
1803 // Get index out of bytecode pointer
1804 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
1805 // Take shortcut if the size is a power of 2
1806 if (is_power_of_2(sizeof(ResolvedFieldEntry))) {
1807 lsl(index, index, log2i_exact(sizeof(ResolvedFieldEntry))); // Scale index by power of 2
1808 } else {
1809 mov(cache, sizeof(ResolvedFieldEntry));
1810 mul(index, index, cache); // Scale the index to be the entry index * sizeof(ResolvedFieldEntry)
1811 }
1812 // Get address of field entries array
1813 ldr(cache, Address(rcpool, ConstantPoolCache::field_entries_offset()));
1814 add(cache, cache, Array<ResolvedFieldEntry>::base_offset_in_bytes());
1815 lea(cache, Address(cache, index));
1816 // Prevents stale data from being read after the bytecode is patched to the fast bytecode
1817 membar(MacroAssembler::LoadLoad);
1818 }
1819
1820 void InterpreterMacroAssembler::load_method_entry(Register cache, Register index, int bcp_offset) {
1821 // Get index out of bytecode pointer
1822 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
1823 mov(cache, sizeof(ResolvedMethodEntry));
1824 mul(index, index, cache); // Scale the index to be the entry index * sizeof(ResolvedMethodEntry)
1825
1826 // Get address of field entries array
1827 ldr(cache, Address(rcpool, ConstantPoolCache::method_entries_offset()));
1828 add(cache, cache, Array<ResolvedMethodEntry>::base_offset_in_bytes());
1829 lea(cache, Address(cache, index));
1830 }
1831
1832 #ifdef ASSERT
1833 void InterpreterMacroAssembler::verify_field_offset(Register reg) {
1834 // Verify the field offset is not in the header, implicitly checks for 0
1835 Label L;
1836 subs(zr, reg, oopDesc::base_offset_in_bytes());
1837 br(Assembler::GE, L);
1838 stop("bad field offset");
1839 bind(L);
1840 }
1841 #endif