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