1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "compiler/compiler_globals.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/constMethodFlags.hpp"
32 #include "oops/markWord.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/method.hpp"
35 #include "oops/inlineKlass.hpp"
36 #include "oops/resolvedFieldEntry.hpp"
37 #include "oops/resolvedIndyEntry.hpp"
38 #include "oops/resolvedMethodEntry.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "prims/jvmtiThreadState.hpp"
41 #include "runtime/basicLock.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/javaThread.hpp"
44 #include "runtime/safepointMechanism.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "utilities/powerOfTwo.hpp"
47
48 // Implementation of InterpreterMacroAssembler
49
50 void InterpreterMacroAssembler::jump_to_entry(address entry) {
51 assert(entry, "Entry must have been generated by now");
52 jump(RuntimeAddress(entry));
53 }
54
55 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
56 Label update, next, none;
57
58 assert_different_registers(obj, rscratch1, mdo_addr.base(), mdo_addr.index());
59
60 interp_verify_oop(obj, atos);
61
62 testptr(obj, obj);
63 jccb(Assembler::notZero, update);
64 testptr(mdo_addr, TypeEntries::null_seen);
65 jccb(Assembler::notZero, next); // null already seen. Nothing to do anymore.
66 // atomic update to prevent overwriting Klass* with 0
67 lock();
68 orptr(mdo_addr, TypeEntries::null_seen);
69 jmpb(next);
70
71 bind(update);
72 load_klass(obj, obj, rscratch1);
73 mov(rscratch1, obj);
74
75 xorptr(obj, mdo_addr);
76 testptr(obj, TypeEntries::type_klass_mask);
77 jccb(Assembler::zero, next); // klass seen before, nothing to
78 // do. The unknown bit may have been
79 // set already but no need to check.
80
81 testptr(obj, TypeEntries::type_unknown);
82 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
83
84 cmpptr(mdo_addr, 0);
85 jccb(Assembler::equal, none);
86 cmpptr(mdo_addr, TypeEntries::null_seen);
87 jccb(Assembler::equal, none);
88
89 // There is a chance that the checks above (re-reading profiling
90 // data from memory) fail if another thread has just set the
91 // profiling to this obj's klass
92 mov(obj, rscratch1);
93 xorptr(obj, mdo_addr);
94 testptr(obj, TypeEntries::type_klass_mask);
95 jccb(Assembler::zero, next);
96
97 // different than before. Cannot keep accurate profile.
98 orptr(mdo_addr, TypeEntries::type_unknown);
99 jmpb(next);
100
101 bind(none);
102 // first time here. Set profile type.
103 movptr(mdo_addr, obj);
104 #ifdef ASSERT
105 andptr(obj, TypeEntries::type_klass_mask);
106 verify_klass_ptr(obj);
107 #endif
108
109 bind(next);
110 }
111
112 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
113 if (!ProfileInterpreter) {
114 return;
115 }
116
117 if (MethodData::profile_arguments() || MethodData::profile_return()) {
118 Label profile_continue;
119
120 test_method_data_pointer(mdp, profile_continue);
121
122 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
123
124 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
125 jcc(Assembler::notEqual, profile_continue);
126
127 if (MethodData::profile_arguments()) {
128 Label done;
129 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
130 addptr(mdp, off_to_args);
131
132 for (int i = 0; i < TypeProfileArgsLimit; i++) {
133 if (i > 0 || MethodData::profile_return()) {
134 // If return value type is profiled we may have no argument to profile
135 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
136 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
137 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
138 jcc(Assembler::less, done);
139 }
140 movptr(tmp, Address(callee, Method::const_offset()));
141 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
142 // stack offset o (zero based) from the start of the argument
143 // list, for n arguments translates into offset n - o - 1 from
144 // the end of the argument list
145 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
146 subl(tmp, 1);
147 Address arg_addr = argument_address(tmp);
148 movptr(tmp, arg_addr);
149
150 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
151 profile_obj_type(tmp, mdo_arg_addr);
152
153 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
154 addptr(mdp, to_add);
155 off_to_args += to_add;
156 }
157
158 if (MethodData::profile_return()) {
159 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
160 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
161 }
162
163 bind(done);
164
165 if (MethodData::profile_return()) {
166 // We're right after the type profile for the last
167 // argument. tmp is the number of cells left in the
168 // CallTypeData/VirtualCallTypeData to reach its end. Non null
169 // if there's a return to profile.
170 assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
171 shll(tmp, log2i_exact((int)DataLayout::cell_size));
172 addptr(mdp, tmp);
173 }
174 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
175 } else {
176 assert(MethodData::profile_return(), "either profile call args or call ret");
177 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
178 }
179
180 // mdp points right after the end of the
181 // CallTypeData/VirtualCallTypeData, right after the cells for the
182 // return value type if there's one
183
184 bind(profile_continue);
185 }
186 }
187
188 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
189 assert_different_registers(mdp, ret, tmp, _bcp_register);
190 if (ProfileInterpreter && MethodData::profile_return()) {
191 Label profile_continue;
192
193 test_method_data_pointer(mdp, profile_continue);
194
195 if (MethodData::profile_return_jsr292_only()) {
196 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
197
198 // If we don't profile all invoke bytecodes we must make sure
199 // it's a bytecode we indeed profile. We can't go back to the
200 // beginning of the ProfileData we intend to update to check its
201 // type because we're right after it and we don't known its
202 // length
203 Label do_profile;
204 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
205 jcc(Assembler::equal, do_profile);
206 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
207 jcc(Assembler::equal, do_profile);
208 get_method(tmp);
209 cmpw(Address(tmp, Method::intrinsic_id_offset()), static_cast<int>(vmIntrinsics::_compiledLambdaForm));
210 jcc(Assembler::notEqual, profile_continue);
211
212 bind(do_profile);
213 }
214
215 Address mdo_ret_addr(mdp, -in_bytes(SingleTypeEntry::size()));
216 mov(tmp, ret);
217 profile_obj_type(tmp, mdo_ret_addr);
218
219 bind(profile_continue);
220 }
221 }
222
223 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
224 if (ProfileInterpreter && MethodData::profile_parameters()) {
225 Label profile_continue;
226
227 test_method_data_pointer(mdp, profile_continue);
228
229 // Load the offset of the area within the MDO used for
230 // parameters. If it's negative we're not profiling any parameters
231 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
232 testl(tmp1, tmp1);
233 jcc(Assembler::negative, profile_continue);
234
235 // Compute a pointer to the area for parameters from the offset
236 // and move the pointer to the slot for the last
237 // parameters. Collect profiling from last parameter down.
238 // mdo start + parameters offset + array length - 1
239 addptr(mdp, tmp1);
240 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
241 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
242
243 Label loop;
244 bind(loop);
245
246 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
247 int type_base = in_bytes(ParametersTypeData::type_offset(0));
248 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
249 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
250 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
251
252 // load offset on the stack from the slot for this parameter
253 movptr(tmp2, arg_off);
254 negptr(tmp2);
255 // read the parameter from the local area
256 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
257
258 // profile the parameter
259 profile_obj_type(tmp2, arg_type);
260
261 // go to next parameter
262 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
263 jcc(Assembler::positive, loop);
264
265 bind(profile_continue);
266 }
267 }
268
269 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
270 int number_of_arguments) {
271 // interpreter specific
272 //
273 // Note: No need to save/restore bcp & locals registers
274 // since these are callee saved registers and no blocking/
275 // GC can happen in leaf calls.
276 // Further Note: DO NOT save/restore bcp/locals. If a caller has
277 // already saved them so that it can use rsi/rdi as temporaries
278 // then a save/restore here will DESTROY the copy the caller
279 // saved! There used to be a save_bcp() that only happened in
280 // the ASSERT path (no restore_bcp). Which caused bizarre failures
281 // when jvm built with ASSERTs.
282 #ifdef ASSERT
283 {
284 Label L;
285 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
286 jcc(Assembler::equal, L);
287 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
288 " last_sp != null");
289 bind(L);
290 }
291 #endif
292 // super call
293 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
294 // interpreter specific
295 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
296 // but since they may not have been saved (and we don't want to
297 // save them here (see note above) the assert is invalid.
298 }
299
300 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
301 Register last_java_sp,
302 address entry_point,
303 int number_of_arguments,
304 bool check_exceptions) {
305 // interpreter specific
306 //
307 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
308 // really make a difference for these runtime calls, since they are
309 // slow anyway. Btw., bcp must be saved/restored since it may change
310 // due to GC.
311 save_bcp();
312 #ifdef ASSERT
313 {
314 Label L;
315 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
316 jcc(Assembler::equal, L);
317 stop("InterpreterMacroAssembler::call_VM_base:"
318 " last_sp isn't null");
319 bind(L);
320 }
321 #endif /* ASSERT */
322 // super call
323 MacroAssembler::call_VM_base(oop_result, last_java_sp,
324 entry_point, number_of_arguments,
325 check_exceptions);
326 // interpreter specific
327 restore_bcp();
328 restore_locals();
329 }
330
331 void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result,
332 address entry_point,
333 Register arg_1) {
334 assert(arg_1 == c_rarg1, "");
335 Label resume_pc, not_preempted;
336
337 #ifdef ASSERT
338 {
339 Label L;
340 cmpptr(Address(r15_thread, JavaThread::preempt_alternate_return_offset()), NULL_WORD);
341 jcc(Assembler::equal, L);
342 stop("Should not have alternate return address set");
343 bind(L);
344 }
345 #endif /* ASSERT */
346
347 // Force freeze slow path.
348 push_cont_fastpath();
349
350 // Make VM call. In case of preemption set last_pc to the one we want to resume to.
351 // Note: call_VM_helper requires last_Java_pc for anchor to be at the top of the stack.
352 lea(rscratch1, resume_pc);
353 push(rscratch1);
354 MacroAssembler::call_VM_helper(oop_result, entry_point, 1, false /*check_exceptions*/);
355 pop(rscratch1);
356
357 pop_cont_fastpath();
358
359 // Check if preempted.
360 movptr(rscratch1, Address(r15_thread, JavaThread::preempt_alternate_return_offset()));
361 cmpptr(rscratch1, NULL_WORD);
362 jccb(Assembler::zero, not_preempted);
363 movptr(Address(r15_thread, JavaThread::preempt_alternate_return_offset()), NULL_WORD);
364 jmp(rscratch1);
365
366 // In case of preemption, this is where we will resume once we finally acquire the monitor.
367 bind(resume_pc);
368 restore_after_resume(false /* is_native */);
369
370 bind(not_preempted);
371 }
372
373 void InterpreterMacroAssembler::restore_after_resume(bool is_native) {
374 lea(rscratch1, ExternalAddress(Interpreter::cont_resume_interpreter_adapter()));
375 call(rscratch1);
376 if (is_native) {
377 // On resume we need to set up stack as expected.
378 push(dtos);
379 push(ltos);
380 }
381 }
382
383 void InterpreterMacroAssembler::check_and_handle_popframe() {
384 if (JvmtiExport::can_pop_frame()) {
385 Label L;
386 // Initiate popframe handling only if it is not already being
387 // processed. If the flag has the popframe_processing bit set, it
388 // means that this code is called *during* popframe handling - we
389 // don't want to reenter.
390 // This method is only called just after the call into the vm in
391 // call_VM_base, so the arg registers are available.
392 Register pop_cond = c_rarg0;
393 movl(pop_cond, Address(r15_thread, JavaThread::popframe_condition_offset()));
394 testl(pop_cond, JavaThread::popframe_pending_bit);
395 jcc(Assembler::zero, L);
396 testl(pop_cond, JavaThread::popframe_processing_bit);
397 jcc(Assembler::notZero, L);
398 // Call Interpreter::remove_activation_preserving_args_entry() to get the
399 // address of the same-named entrypoint in the generated interpreter code.
400 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
401 jmp(rax);
402 bind(L);
403 }
404 }
405
406 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
407 movptr(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
408 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
409 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
410 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
411
412 switch (state) {
413 case atos: movptr(rax, oop_addr);
414 movptr(oop_addr, NULL_WORD);
415 interp_verify_oop(rax, state); break;
416 case ltos: movptr(rax, val_addr); break;
417 case btos: // fall through
418 case ztos: // fall through
419 case ctos: // fall through
420 case stos: // fall through
421 case itos: movl(rax, val_addr); break;
422 case ftos: movflt(xmm0, val_addr); break;
423 case dtos: movdbl(xmm0, val_addr); break;
424 case vtos: /* nothing to do */ break;
425 default : ShouldNotReachHere();
426 }
427
428 // Clean up tos value in the thread object
429 movl(tos_addr, ilgl);
430 movptr(val_addr, NULL_WORD);
431 }
432
433
434 void InterpreterMacroAssembler::check_and_handle_earlyret() {
435 if (JvmtiExport::can_force_early_return()) {
436 Label L;
437 Register tmp = c_rarg0;
438 Register rthread = r15_thread;
439
440 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
441 testptr(tmp, tmp);
442 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == nullptr) exit;
443
444 // Initiate earlyret handling only if it is not already being processed.
445 // If the flag has the earlyret_processing bit set, it means that this code
446 // is called *during* earlyret handling - we don't want to reenter.
447 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
448 cmpl(tmp, JvmtiThreadState::earlyret_pending);
449 jcc(Assembler::notEqual, L);
450
451 // Call Interpreter::remove_activation_early_entry() to get the address of the
452 // same-named entrypoint in the generated interpreter code.
453 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
454 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
455 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
456 jmp(rax);
457 bind(L);
458 }
459 }
460
461 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
462 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
463 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
464 bswapl(reg);
465 shrl(reg, 16);
466 }
467
468 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
469 int bcp_offset,
470 size_t index_size) {
471 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
472 if (index_size == sizeof(u2)) {
473 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
474 } else if (index_size == sizeof(u4)) {
475 movl(index, Address(_bcp_register, bcp_offset));
476 } else if (index_size == sizeof(u1)) {
477 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
478 } else {
479 ShouldNotReachHere();
480 }
481 }
482
483 // Load object from cpool->resolved_references(index)
484 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result,
485 Register index,
486 Register tmp) {
487 assert_different_registers(result, index);
488
489 get_constant_pool(result);
490 // load pointer for resolved_references[] objArray
491 movptr(result, Address(result, ConstantPool::cache_offset()));
492 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset()));
493 resolve_oop_handle(result, tmp);
494 load_heap_oop(result, Address(result, index,
495 UseCompressedOops ? Address::times_4 : Address::times_ptr,
496 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
497 }
498
499 // load cpool->resolved_klass_at(index)
500 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass,
501 Register cpool,
502 Register index) {
503 assert_different_registers(cpool, index);
504
505 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
506 Register resolved_klasses = cpool;
507 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset()));
508 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
509 }
510
511 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
512 // subtype of super_klass.
513 //
514 // Args:
515 // rax: superklass
516 // Rsub_klass: subklass
517 //
518 // Kills:
519 // rcx, rdi
520 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
521 Label& ok_is_subtype,
522 bool profile) {
523 assert(Rsub_klass != rax, "rax holds superklass");
524 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
525 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
526 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
527 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
528
529 // Profile the not-null value's klass.
530 if (profile) {
531 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
532 }
533
534 // Do the check.
535 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
536 }
537
538
539 // Java Expression Stack
540
541 void InterpreterMacroAssembler::pop_ptr(Register r) {
542 pop(r);
543 }
544
545 void InterpreterMacroAssembler::push_ptr(Register r) {
546 push(r);
547 }
548
549 void InterpreterMacroAssembler::push_i(Register r) {
550 push(r);
551 }
552
553 void InterpreterMacroAssembler::push_i_or_ptr(Register r) {
554 push(r);
555 }
556
557 void InterpreterMacroAssembler::push_f(XMMRegister r) {
558 subptr(rsp, wordSize);
559 movflt(Address(rsp, 0), r);
560 }
561
562 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
563 movflt(r, Address(rsp, 0));
564 addptr(rsp, wordSize);
565 }
566
567 void InterpreterMacroAssembler::push_d(XMMRegister r) {
568 subptr(rsp, 2 * wordSize);
569 movdbl(Address(rsp, 0), r);
570 }
571
572 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
573 movdbl(r, Address(rsp, 0));
574 addptr(rsp, 2 * Interpreter::stackElementSize);
575 }
576
577 void InterpreterMacroAssembler::pop_i(Register r) {
578 // XXX can't use pop currently, upper half non clean
579 movl(r, Address(rsp, 0));
580 addptr(rsp, wordSize);
581 }
582
583 void InterpreterMacroAssembler::pop_l(Register r) {
584 movq(r, Address(rsp, 0));
585 addptr(rsp, 2 * Interpreter::stackElementSize);
586 }
587
588 void InterpreterMacroAssembler::push_l(Register r) {
589 subptr(rsp, 2 * wordSize);
590 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
591 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
592 }
593
594 void InterpreterMacroAssembler::pop(TosState state) {
595 switch (state) {
596 case atos: pop_ptr(); break;
597 case btos:
598 case ztos:
599 case ctos:
600 case stos:
601 case itos: pop_i(); break;
602 case ltos: pop_l(); break;
603 case ftos: pop_f(xmm0); break;
604 case dtos: pop_d(xmm0); break;
605 case vtos: /* nothing to do */ break;
606 default: ShouldNotReachHere();
607 }
608 interp_verify_oop(rax, state);
609 }
610
611 void InterpreterMacroAssembler::push(TosState state) {
612 interp_verify_oop(rax, state);
613 switch (state) {
614 case atos: push_ptr(); break;
615 case btos:
616 case ztos:
617 case ctos:
618 case stos:
619 case itos: push_i(); break;
620 case ltos: push_l(); break;
621 case ftos: push_f(xmm0); break;
622 case dtos: push_d(xmm0); break;
623 case vtos: /* nothing to do */ break;
624 default : ShouldNotReachHere();
625 }
626 }
627
628 // Helpers for swap and dup
629 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
630 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
631 }
632
633 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
634 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
635 }
636
637
638 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
639 // set sender sp
640 lea(_bcp_register, Address(rsp, wordSize));
641 // record last_sp
642 mov(rcx, _bcp_register);
643 subptr(rcx, rbp);
644 sarptr(rcx, LogBytesPerWord);
645 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rcx);
646 }
647
648
649 // Jump to from_interpreted entry of a call unless single stepping is possible
650 // in this thread in which case we must call the i2i entry
651 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
652 prepare_to_jump_from_interpreted();
653
654 if (JvmtiExport::can_post_interpreter_events()) {
655 Label run_compiled_code;
656 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
657 // compiled code in threads for which the event is enabled. Check here for
658 // interp_only_mode if these events CAN be enabled.
659 // interp_only is an int, on little endian it is sufficient to test the byte only
660 // Is a cmpl faster?
661 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0);
662 jccb(Assembler::zero, run_compiled_code);
663 jmp(Address(method, Method::interpreter_entry_offset()));
664 bind(run_compiled_code);
665 }
666
667 jmp(Address(method, Method::from_interpreted_offset()));
668 }
669
670 // The following two routines provide a hook so that an implementation
671 // can schedule the dispatch in two parts. x86 does not do this.
672 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
673 // Nothing x86 specific to be done here
674 }
675
676 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
677 dispatch_next(state, step);
678 }
679
680 void InterpreterMacroAssembler::dispatch_base(TosState state,
681 address* table,
682 bool verifyoop,
683 bool generate_poll) {
684 if (VerifyActivationFrameSize) {
685 Label L;
686 mov(rcx, rbp);
687 subptr(rcx, rsp);
688 int32_t min_frame_size =
689 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
690 wordSize;
691 cmpptr(rcx, min_frame_size);
692 jcc(Assembler::greaterEqual, L);
693 stop("broken stack frame");
694 bind(L);
695 }
696 if (verifyoop) {
697 interp_verify_oop(rax, state);
698 }
699
700 address* const safepoint_table = Interpreter::safept_table(state);
701 Label no_safepoint, dispatch;
702 if (table != safepoint_table && generate_poll) {
703 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
704 testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
705
706 jccb(Assembler::zero, no_safepoint);
707 lea(rscratch1, ExternalAddress((address)safepoint_table));
708 jmpb(dispatch);
709 }
710
711 bind(no_safepoint);
712 lea(rscratch1, ExternalAddress((address)table));
713 bind(dispatch);
714 jmp(Address(rscratch1, rbx, Address::times_8));
715 }
716
717 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
718 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
719 }
720
721 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
722 dispatch_base(state, Interpreter::normal_table(state));
723 }
724
725 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
726 dispatch_base(state, Interpreter::normal_table(state), false);
727 }
728
729
730 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
731 // load next bytecode (load before advancing _bcp_register to prevent AGI)
732 load_unsigned_byte(rbx, Address(_bcp_register, step));
733 // advance _bcp_register
734 increment(_bcp_register, step);
735 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
736 }
737
738 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
739 // load current bytecode
740 load_unsigned_byte(rbx, Address(_bcp_register, 0));
741 dispatch_base(state, table);
742 }
743
744 void InterpreterMacroAssembler::narrow(Register result) {
745
746 // Get method->_constMethod->_result_type
747 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
748 movptr(rcx, Address(rcx, Method::const_offset()));
749 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
750
751 Label done, notBool, notByte, notChar;
752
753 // common case first
754 cmpl(rcx, T_INT);
755 jcc(Assembler::equal, done);
756
757 // mask integer result to narrower return type.
758 cmpl(rcx, T_BOOLEAN);
759 jcc(Assembler::notEqual, notBool);
760 andl(result, 0x1);
761 jmp(done);
762
763 bind(notBool);
764 cmpl(rcx, T_BYTE);
765 jcc(Assembler::notEqual, notByte);
766 movsbl(result, result);
767 jmp(done);
768
769 bind(notByte);
770 cmpl(rcx, T_CHAR);
771 jcc(Assembler::notEqual, notChar);
772 movzwl(result, result);
773 jmp(done);
774
775 bind(notChar);
776 // cmpl(rcx, T_SHORT); // all that's left
777 // jcc(Assembler::notEqual, done);
778 movswl(result, result);
779
780 // Nothing to do for T_INT
781 bind(done);
782 }
783
784 // remove activation
785 //
786 // Apply stack watermark barrier.
787 // Unlock the receiver if this is a synchronized method.
788 // Unlock any Java monitors from synchronized blocks.
789 // Remove the activation from the stack.
790 //
791 // If there are locked Java monitors
792 // If throw_monitor_exception
793 // throws IllegalMonitorStateException
794 // Else if install_monitor_exception
795 // installs IllegalMonitorStateException
796 // Else
797 // no error processing
798 void InterpreterMacroAssembler::remove_activation(
799 TosState state,
800 Register ret_addr,
801 bool throw_monitor_exception,
802 bool install_monitor_exception,
803 bool notify_jvmdi) {
804 // Note: Registers rdx xmm0 may be in use for the
805 // result check if synchronized method
806 Label unlocked, unlock, no_unlock;
807
808 const Register rthread = r15_thread;
809 const Register robj = c_rarg1;
810 const Register rmon = c_rarg1;
811
812 // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
813 // that would normally not be safe to use. Such bad returns into unsafe territory of
814 // the stack, will call InterpreterRuntime::at_unwind.
815 Label slow_path;
816 Label fast_path;
817 safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */);
818 jmp(fast_path);
819 bind(slow_path);
820 push(state);
821 set_last_Java_frame(noreg, rbp, (address)pc(), rscratch1);
822 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
823 reset_last_Java_frame(true);
824 pop(state);
825 bind(fast_path);
826
827 // get the value of _do_not_unlock_if_synchronized into rdx
828 const Address do_not_unlock_if_synchronized(rthread,
829 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
830 movbool(rbx, do_not_unlock_if_synchronized);
831 movbool(do_not_unlock_if_synchronized, false); // reset the flag
832
833 // get method access flags
834 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
835 load_unsigned_short(rcx, Address(rcx, Method::access_flags_offset()));
836 testl(rcx, JVM_ACC_SYNCHRONIZED);
837 jcc(Assembler::zero, unlocked);
838
839 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
840 // is set.
841 testbool(rbx);
842 jcc(Assembler::notZero, no_unlock);
843
844 // unlock monitor
845 push(state); // save result
846
847 // BasicObjectLock will be first in list, since this is a
848 // synchronized method. However, need to check that the object has
849 // not been unlocked by an explicit monitorexit bytecode.
850 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
851 wordSize - (int) sizeof(BasicObjectLock));
852 // We use c_rarg1/rdx so that if we go slow path it will be the correct
853 // register for unlock_object to pass to VM directly
854 lea(robj, monitor); // address of first monitor
855
856 movptr(rax, Address(robj, BasicObjectLock::obj_offset()));
857 testptr(rax, rax);
858 jcc(Assembler::notZero, unlock);
859
860 pop(state);
861 if (throw_monitor_exception) {
862 // Entry already unlocked, need to throw exception
863 call_VM(noreg, CAST_FROM_FN_PTR(address,
864 InterpreterRuntime::throw_illegal_monitor_state_exception));
865 should_not_reach_here();
866 } else {
867 // Monitor already unlocked during a stack unroll. If requested,
868 // install an illegal_monitor_state_exception. Continue with
869 // stack unrolling.
870 if (install_monitor_exception) {
871 call_VM(noreg, CAST_FROM_FN_PTR(address,
872 InterpreterRuntime::new_illegal_monitor_state_exception));
873 }
874 jmp(unlocked);
875 }
876
877 bind(unlock);
878 unlock_object(robj);
879 pop(state);
880
881 // Check that for block-structured locking (i.e., that all locked
882 // objects has been unlocked)
883 bind(unlocked);
884
885 // rax, rdx: Might contain return value
886
887 // Check that all monitors are unlocked
888 {
889 Label loop, exception, entry, restart;
890 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
891 const Address monitor_block_top(
892 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
893 const Address monitor_block_bot(
894 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
895
896 bind(restart);
897 // We use c_rarg1 so that if we go slow path it will be the correct
898 // register for unlock_object to pass to VM directly
899 movptr(rmon, monitor_block_top); // derelativize pointer
900 lea(rmon, Address(rbp, rmon, Address::times_ptr));
901 // c_rarg1 points to current entry, starting with top-most entry
902
903 lea(rbx, monitor_block_bot); // points to word before bottom of
904 // monitor block
905 jmp(entry);
906
907 // Entry already locked, need to throw exception
908 bind(exception);
909
910 if (throw_monitor_exception) {
911 // Throw exception
912 MacroAssembler::call_VM(noreg,
913 CAST_FROM_FN_PTR(address, InterpreterRuntime::
914 throw_illegal_monitor_state_exception));
915 should_not_reach_here();
916 } else {
917 // Stack unrolling. Unlock object and install illegal_monitor_exception.
918 // Unlock does not block, so don't have to worry about the frame.
919 // We don't have to preserve c_rarg1 since we are going to throw an exception.
920
921 push(state);
922 mov(robj, rmon); // nop if robj and rmon are the same
923 unlock_object(robj);
924 pop(state);
925
926 if (install_monitor_exception) {
927 call_VM(noreg, CAST_FROM_FN_PTR(address,
928 InterpreterRuntime::
929 new_illegal_monitor_state_exception));
930 }
931
932 jmp(restart);
933 }
934
935 bind(loop);
936 // check if current entry is used
937 cmpptr(Address(rmon, BasicObjectLock::obj_offset()), NULL_WORD);
938 jcc(Assembler::notEqual, exception);
939
940 addptr(rmon, entry_size); // otherwise advance to next entry
941 bind(entry);
942 cmpptr(rmon, rbx); // check if bottom reached
943 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
944 }
945
946 bind(no_unlock);
947
948 // jvmti support
949 if (notify_jvmdi) {
950 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
951 } else {
952 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
953 }
954
955 if (StackReservedPages > 0) {
956 movptr(rbx,
957 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
958 // testing if reserved zone needs to be re-enabled
959 Register rthread = r15_thread;
960 Label no_reserved_zone_enabling;
961
962 // check if already enabled - if so no re-enabling needed
963 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
964 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
965 jcc(Assembler::equal, no_reserved_zone_enabling);
966
967 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
968 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
969
970 call_VM_leaf(
971 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
972 call_VM(noreg, CAST_FROM_FN_PTR(address,
973 InterpreterRuntime::throw_delayed_StackOverflowError));
974 should_not_reach_here();
975
976 bind(no_reserved_zone_enabling);
977 }
978
979 // remove activation
980 // get sender sp
981 movptr(rbx,
982 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
983
984 if (state == atos && InlineTypeReturnedAsFields) {
985 // Check if we are returning an non-null inline type and load its fields into registers
986 Label skip;
987 test_oop_is_not_inline_type(rax, rscratch1, skip);
988
989 #ifndef _LP64
990 super_call_VM_leaf(StubRoutines::load_inline_type_fields_in_regs());
991 #else
992 // Load fields from a buffered value with an inline class specific handler
993 load_klass(rdi, rax, rscratch1);
994 movptr(rdi, Address(rdi, InstanceKlass::adr_inlineklass_fixed_block_offset()));
995 movptr(rdi, Address(rdi, InlineKlass::unpack_handler_offset()));
996 // Unpack handler can be null if inline type is not scalarizable in returns
997 testptr(rdi, rdi);
998 jcc(Assembler::zero, skip);
999 call(rdi);
1000 #endif
1001 #ifdef ASSERT
1002 // TODO 8284443 Enable
1003 if (StressCallingConvention && false) {
1004 Label skip_stress;
1005 movptr(rscratch1, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1006 movl(rscratch1, Address(rscratch1, Method::flags_offset()));
1007 testl(rcx, MethodFlags::has_scalarized_return_flag());
1008 jcc(Assembler::zero, skip_stress);
1009 load_klass(rax, rax, rscratch1);
1010 orptr(rax, 1);
1011 bind(skip_stress);
1012 }
1013 #endif
1014 // call above kills the value in rbx. Reload it.
1015 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1016 bind(skip);
1017 }
1018 leave(); // remove frame anchor
1019 pop(ret_addr); // get return address
1020 mov(rsp, rbx); // set sp to sender sp
1021 pop_cont_fastpath();
1022 }
1023
1024 void InterpreterMacroAssembler::get_method_counters(Register method,
1025 Register mcs, Label& skip) {
1026 Label has_counters;
1027 movptr(mcs, Address(method, Method::method_counters_offset()));
1028 testptr(mcs, mcs);
1029 jcc(Assembler::notZero, has_counters);
1030 call_VM(noreg, CAST_FROM_FN_PTR(address,
1031 InterpreterRuntime::build_method_counters), method);
1032 movptr(mcs, Address(method,Method::method_counters_offset()));
1033 testptr(mcs, mcs);
1034 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1035 bind(has_counters);
1036 }
1037
1038 void InterpreterMacroAssembler::allocate_instance(Register klass, Register new_obj,
1039 Register t1, Register t2,
1040 bool clear_fields, Label& alloc_failed) {
1041 MacroAssembler::allocate_instance(klass, new_obj, t1, t2, clear_fields, alloc_failed);
1042 if (DTraceMethodProbes) {
1043 // Trigger dtrace event for fastpath
1044 push(atos);
1045 call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), new_obj);
1046 pop(atos);
1047 }
1048 }
1049
1050 void InterpreterMacroAssembler::read_flat_field(Register entry, Register tmp1, Register tmp2, Register obj) {
1051 Label alloc_failed, done;
1052 const Register alloc_temp = LP64_ONLY(rscratch1) NOT_LP64(rsi);
1053 const Register dst_temp = LP64_ONLY(rscratch2) NOT_LP64(rdi);
1054 assert_different_registers(obj, entry, tmp1, tmp2, dst_temp, r8, r9);
1055
1056 // FIXME: code below could be re-written to better use InlineLayoutInfo data structure
1057 // see aarch64 version
1058
1059 // Grap the inline field klass
1060 const Register field_klass = tmp1;
1061 load_unsigned_short(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1062 movptr(tmp1, Address(entry, ResolvedFieldEntry::field_holder_offset()));
1063 get_inline_type_field_klass(tmp1, tmp2, field_klass);
1064
1065 // allocate buffer
1066 push(obj); // push object being read from // FIXME spilling on stack could probably be avoided by using tmp2
1067 allocate_instance(field_klass, obj, alloc_temp, dst_temp, false, alloc_failed);
1068
1069 // Have an oop instance buffer, copy into it
1070 load_unsigned_short(r9, Address(entry, in_bytes(ResolvedFieldEntry::field_index_offset())));
1071 movptr(r8, Address(entry, in_bytes(ResolvedFieldEntry::field_holder_offset())));
1072 inline_layout_info(r8, r9, r8); // holder, index, info => InlineLayoutInfo into r8
1073
1074 payload_addr(obj, dst_temp, field_klass);
1075 pop(alloc_temp); // restore object being read from
1076 load_sized_value(tmp2, Address(entry, in_bytes(ResolvedFieldEntry::field_offset_offset())), sizeof(int), true /*is_signed*/);
1077 lea(tmp2, Address(alloc_temp, tmp2));
1078 // call_VM_leaf, clobbers a few regs, save restore new obj
1079 push(obj);
1080 // access_value_copy(IS_DEST_UNINITIALIZED, tmp2, dst_temp, field_klass);
1081 flat_field_copy(IS_DEST_UNINITIALIZED, tmp2, dst_temp, r8);
1082 pop(obj);
1083 jmp(done);
1084
1085 bind(alloc_failed);
1086 pop(obj);
1087 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flat_field),
1088 obj, entry);
1089 get_vm_result_oop(obj);
1090 bind(done);
1091 }
1092
1093 // Lock object
1094 //
1095 // Args:
1096 // rdx, c_rarg1: BasicObjectLock to be used for locking
1097 //
1098 // Kills:
1099 // rax, rbx
1100 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1101 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1102
1103 if (LockingMode == LM_MONITOR) {
1104 call_VM_preemptable(noreg,
1105 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1106 lock_reg);
1107 } else {
1108 Label count_locking, done, slow_case;
1109
1110 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1111 const Register tmp_reg = rbx;
1112 const Register obj_reg = c_rarg3; // Will contain the oop
1113 const Register rklass_decode_tmp = rscratch1;
1114
1115 const int obj_offset = in_bytes(BasicObjectLock::obj_offset());
1116 const int lock_offset = in_bytes(BasicObjectLock::lock_offset());
1117 const int mark_offset = lock_offset +
1118 BasicLock::displaced_header_offset_in_bytes();
1119
1120 // Load object pointer into obj_reg
1121 movptr(obj_reg, Address(lock_reg, obj_offset));
1122
1123 if (LockingMode == LM_LIGHTWEIGHT) {
1124 lightweight_lock(lock_reg, obj_reg, swap_reg, tmp_reg, slow_case);
1125 } else if (LockingMode == LM_LEGACY) {
1126 if (DiagnoseSyncOnValueBasedClasses != 0) {
1127 load_klass(tmp_reg, obj_reg, rklass_decode_tmp);
1128 testb(Address(tmp_reg, Klass::misc_flags_offset()), KlassFlags::_misc_is_value_based_class);
1129 jcc(Assembler::notZero, slow_case);
1130 }
1131
1132 // Load immediate 1 into swap_reg %rax
1133 movl(swap_reg, 1);
1134
1135 // Load (object->mark() | 1) into swap_reg %rax
1136 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1137 if (EnableValhalla) {
1138 // Mask inline_type bit such that we go to the slow path if object is an inline type
1139 andptr(swap_reg, ~((int) markWord::inline_type_bit_in_place));
1140 }
1141
1142 // Save (object->mark() | 1) into BasicLock's displaced header
1143 movptr(Address(lock_reg, mark_offset), swap_reg);
1144
1145 assert(lock_offset == 0,
1146 "displaced header must be first word in BasicObjectLock");
1147
1148 lock();
1149 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1150 jcc(Assembler::zero, count_locking);
1151
1152 const int zero_bits = 7;
1153
1154 // Fast check for recursive lock.
1155 //
1156 // Can apply the optimization only if this is a stack lock
1157 // allocated in this thread. For efficiency, we can focus on
1158 // recently allocated stack locks (instead of reading the stack
1159 // base and checking whether 'mark' points inside the current
1160 // thread stack):
1161 // 1) (mark & zero_bits) == 0, and
1162 // 2) rsp <= mark < mark + os::pagesize()
1163 //
1164 // Warning: rsp + os::pagesize can overflow the stack base. We must
1165 // neither apply the optimization for an inflated lock allocated
1166 // just above the thread stack (this is why condition 1 matters)
1167 // nor apply the optimization if the stack lock is inside the stack
1168 // of another thread. The latter is avoided even in case of overflow
1169 // because we have guard pages at the end of all stacks. Hence, if
1170 // we go over the stack base and hit the stack of another thread,
1171 // this should not be in a writeable area that could contain a
1172 // stack lock allocated by that thread. As a consequence, a stack
1173 // lock less than page size away from rsp is guaranteed to be
1174 // owned by the current thread.
1175 //
1176 // These 3 tests can be done by evaluating the following
1177 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1178 // assuming both stack pointer and pagesize have their
1179 // least significant bits clear.
1180 // NOTE: the mark is in swap_reg %rax as the result of cmpxchg
1181 subptr(swap_reg, rsp);
1182 andptr(swap_reg, zero_bits - (int)os::vm_page_size());
1183
1184 // Save the test result, for recursive case, the result is zero
1185 movptr(Address(lock_reg, mark_offset), swap_reg);
1186 jcc(Assembler::notZero, slow_case);
1187
1188 bind(count_locking);
1189 inc_held_monitor_count();
1190 }
1191 jmp(done);
1192
1193 bind(slow_case);
1194
1195 // Call the runtime routine for slow case
1196 call_VM_preemptable(noreg,
1197 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1198 lock_reg);
1199 bind(done);
1200 }
1201 }
1202
1203
1204 // Unlocks an object. Used in monitorexit bytecode and
1205 // remove_activation. Throws an IllegalMonitorException if object is
1206 // not locked by current thread.
1207 //
1208 // Args:
1209 // rdx, c_rarg1: BasicObjectLock for lock
1210 //
1211 // Kills:
1212 // rax
1213 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1214 // rscratch1 (scratch reg)
1215 // rax, rbx, rcx, rdx
1216 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1217 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1");
1218
1219 if (LockingMode == LM_MONITOR) {
1220 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1221 } else {
1222 Label count_locking, done, slow_case;
1223
1224 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1225 const Register header_reg = c_rarg2; // Will contain the old oopMark
1226 const Register obj_reg = c_rarg3; // Will contain the oop
1227
1228 save_bcp(); // Save in case of exception
1229
1230 if (LockingMode != LM_LIGHTWEIGHT) {
1231 // Convert from BasicObjectLock structure to object and BasicLock
1232 // structure Store the BasicLock address into %rax
1233 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset()));
1234 }
1235
1236 // Load oop into obj_reg(%c_rarg3)
1237 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
1238
1239 // Free entry
1240 movptr(Address(lock_reg, BasicObjectLock::obj_offset()), NULL_WORD);
1241
1242 if (LockingMode == LM_LIGHTWEIGHT) {
1243 lightweight_unlock(obj_reg, swap_reg, header_reg, slow_case);
1244 } else if (LockingMode == LM_LEGACY) {
1245 // Load the old header from BasicLock structure
1246 movptr(header_reg, Address(swap_reg,
1247 BasicLock::displaced_header_offset_in_bytes()));
1248
1249 // Test for recursion
1250 testptr(header_reg, header_reg);
1251
1252 // zero for recursive case
1253 jcc(Assembler::zero, count_locking);
1254
1255 // Atomic swap back the old header
1256 lock();
1257 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1258
1259 // zero for simple unlock of a stack-lock case
1260 jcc(Assembler::notZero, slow_case);
1261
1262 bind(count_locking);
1263 dec_held_monitor_count();
1264 }
1265 jmp(done);
1266
1267 bind(slow_case);
1268 // Call the runtime routine for slow case.
1269 movptr(Address(lock_reg, BasicObjectLock::obj_offset()), obj_reg); // restore obj
1270 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1271
1272 bind(done);
1273
1274 restore_bcp();
1275 }
1276 }
1277
1278 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1279 Label& zero_continue) {
1280 assert(ProfileInterpreter, "must be profiling interpreter");
1281 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1282 testptr(mdp, mdp);
1283 jcc(Assembler::zero, zero_continue);
1284 }
1285
1286
1287 // Set the method data pointer for the current bcp.
1288 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1289 assert(ProfileInterpreter, "must be profiling interpreter");
1290 Label set_mdp;
1291 push(rax);
1292 push(rbx);
1293
1294 get_method(rbx);
1295 // Test MDO to avoid the call if it is null.
1296 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1297 testptr(rax, rax);
1298 jcc(Assembler::zero, set_mdp);
1299 // rbx: method
1300 // _bcp_register: bcp
1301 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1302 // rax: mdi
1303 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1304 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1305 addptr(rbx, in_bytes(MethodData::data_offset()));
1306 addptr(rax, rbx);
1307 bind(set_mdp);
1308 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1309 pop(rbx);
1310 pop(rax);
1311 }
1312
1313 void InterpreterMacroAssembler::verify_method_data_pointer() {
1314 assert(ProfileInterpreter, "must be profiling interpreter");
1315 #ifdef ASSERT
1316 Label verify_continue;
1317 push(rax);
1318 push(rbx);
1319 Register arg3_reg = c_rarg3;
1320 Register arg2_reg = c_rarg2;
1321 push(arg3_reg);
1322 push(arg2_reg);
1323 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1324 get_method(rbx);
1325
1326 // If the mdp is valid, it will point to a DataLayout header which is
1327 // consistent with the bcp. The converse is highly probable also.
1328 load_unsigned_short(arg2_reg,
1329 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1330 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1331 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1332 cmpptr(arg2_reg, _bcp_register);
1333 jcc(Assembler::equal, verify_continue);
1334 // rbx: method
1335 // _bcp_register: bcp
1336 // c_rarg3: mdp
1337 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1338 rbx, _bcp_register, arg3_reg);
1339 bind(verify_continue);
1340 pop(arg2_reg);
1341 pop(arg3_reg);
1342 pop(rbx);
1343 pop(rax);
1344 #endif // ASSERT
1345 }
1346
1347
1348 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1349 int constant,
1350 Register value) {
1351 assert(ProfileInterpreter, "must be profiling interpreter");
1352 Address data(mdp_in, constant);
1353 movptr(data, value);
1354 }
1355
1356
1357 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1358 int constant,
1359 bool decrement) {
1360 // Counter address
1361 Address data(mdp_in, constant);
1362
1363 increment_mdp_data_at(data, decrement);
1364 }
1365
1366 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1367 bool decrement) {
1368 assert(ProfileInterpreter, "must be profiling interpreter");
1369 // %%% this does 64bit counters at best it is wasting space
1370 // at worst it is a rare bug when counters overflow
1371
1372 if (decrement) {
1373 // Decrement the register. Set condition codes.
1374 addptr(data, -DataLayout::counter_increment);
1375 // If the decrement causes the counter to overflow, stay negative
1376 Label L;
1377 jcc(Assembler::negative, L);
1378 addptr(data, DataLayout::counter_increment);
1379 bind(L);
1380 } else {
1381 assert(DataLayout::counter_increment == 1,
1382 "flow-free idiom only works with 1");
1383 // Increment the register. Set carry flag.
1384 addptr(data, DataLayout::counter_increment);
1385 // If the increment causes the counter to overflow, pull back by 1.
1386 sbbptr(data, 0);
1387 }
1388 }
1389
1390
1391 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1392 Register reg,
1393 int constant,
1394 bool decrement) {
1395 Address data(mdp_in, reg, Address::times_1, constant);
1396
1397 increment_mdp_data_at(data, decrement);
1398 }
1399
1400 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1401 int flag_byte_constant) {
1402 assert(ProfileInterpreter, "must be profiling interpreter");
1403 int header_offset = in_bytes(DataLayout::flags_offset());
1404 int header_bits = flag_byte_constant;
1405 // Set the flag
1406 orb(Address(mdp_in, header_offset), header_bits);
1407 }
1408
1409
1410
1411 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1412 int offset,
1413 Register value,
1414 Register test_value_out,
1415 Label& not_equal_continue) {
1416 assert(ProfileInterpreter, "must be profiling interpreter");
1417 if (test_value_out == noreg) {
1418 cmpptr(value, Address(mdp_in, offset));
1419 } else {
1420 // Put the test value into a register, so caller can use it:
1421 movptr(test_value_out, Address(mdp_in, offset));
1422 cmpptr(test_value_out, value);
1423 }
1424 jcc(Assembler::notEqual, not_equal_continue);
1425 }
1426
1427
1428 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1429 int offset_of_disp) {
1430 assert(ProfileInterpreter, "must be profiling interpreter");
1431 Address disp_address(mdp_in, offset_of_disp);
1432 addptr(mdp_in, disp_address);
1433 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1434 }
1435
1436
1437 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1438 Register reg,
1439 int offset_of_disp) {
1440 assert(ProfileInterpreter, "must be profiling interpreter");
1441 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1442 addptr(mdp_in, disp_address);
1443 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1444 }
1445
1446
1447 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1448 int constant) {
1449 assert(ProfileInterpreter, "must be profiling interpreter");
1450 addptr(mdp_in, constant);
1451 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1452 }
1453
1454
1455 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1456 assert(ProfileInterpreter, "must be profiling interpreter");
1457 push(return_bci); // save/restore across call_VM
1458 call_VM(noreg,
1459 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1460 return_bci);
1461 pop(return_bci);
1462 }
1463
1464
1465 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1466 Register bumped_count) {
1467 if (ProfileInterpreter) {
1468 Label profile_continue;
1469
1470 // If no method data exists, go to profile_continue.
1471 // Otherwise, assign to mdp
1472 test_method_data_pointer(mdp, profile_continue);
1473
1474 // We are taking a branch. Increment the taken count.
1475 // We inline increment_mdp_data_at to return bumped_count in a register
1476 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1477 Address data(mdp, in_bytes(JumpData::taken_offset()));
1478 movptr(bumped_count, data);
1479 assert(DataLayout::counter_increment == 1,
1480 "flow-free idiom only works with 1");
1481 addptr(bumped_count, DataLayout::counter_increment);
1482 sbbptr(bumped_count, 0);
1483 movptr(data, bumped_count); // Store back out
1484
1485 // The method data pointer needs to be updated to reflect the new target.
1486 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1487 bind(profile_continue);
1488 }
1489 }
1490
1491
1492 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp, bool acmp) {
1493 if (ProfileInterpreter) {
1494 Label profile_continue;
1495
1496 // If no method data exists, go to profile_continue.
1497 test_method_data_pointer(mdp, profile_continue);
1498
1499 // We are taking a branch. Increment the not taken count.
1500 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1501
1502 // The method data pointer needs to be updated to correspond to
1503 // the next bytecode
1504 update_mdp_by_constant(mdp, acmp ? in_bytes(ACmpData::acmp_data_size()): in_bytes(BranchData::branch_data_size()));
1505 bind(profile_continue);
1506 }
1507 }
1508
1509 void InterpreterMacroAssembler::profile_call(Register mdp) {
1510 if (ProfileInterpreter) {
1511 Label profile_continue;
1512
1513 // If no method data exists, go to profile_continue.
1514 test_method_data_pointer(mdp, profile_continue);
1515
1516 // We are making a call. Increment the count.
1517 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1518
1519 // The method data pointer needs to be updated to reflect the new target.
1520 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1521 bind(profile_continue);
1522 }
1523 }
1524
1525
1526 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1527 if (ProfileInterpreter) {
1528 Label profile_continue;
1529
1530 // If no method data exists, go to profile_continue.
1531 test_method_data_pointer(mdp, profile_continue);
1532
1533 // We are making a call. Increment the count.
1534 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1535
1536 // The method data pointer needs to be updated to reflect the new target.
1537 update_mdp_by_constant(mdp,
1538 in_bytes(VirtualCallData::
1539 virtual_call_data_size()));
1540 bind(profile_continue);
1541 }
1542 }
1543
1544
1545 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1546 Register mdp,
1547 Register reg2,
1548 bool receiver_can_be_null) {
1549 if (ProfileInterpreter) {
1550 Label profile_continue;
1551
1552 // If no method data exists, go to profile_continue.
1553 test_method_data_pointer(mdp, profile_continue);
1554
1555 Label skip_receiver_profile;
1556 if (receiver_can_be_null) {
1557 Label not_null;
1558 testptr(receiver, receiver);
1559 jccb(Assembler::notZero, not_null);
1560 // We are making a call. Increment the count for null receiver.
1561 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1562 jmp(skip_receiver_profile);
1563 bind(not_null);
1564 }
1565
1566 // Record the receiver type.
1567 record_klass_in_profile(receiver, mdp, reg2);
1568 bind(skip_receiver_profile);
1569
1570 // The method data pointer needs to be updated to reflect the new target.
1571 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1572 bind(profile_continue);
1573 }
1574 }
1575
1576 // This routine creates a state machine for updating the multi-row
1577 // type profile at a virtual call site (or other type-sensitive bytecode).
1578 // The machine visits each row (of receiver/count) until the receiver type
1579 // is found, or until it runs out of rows. At the same time, it remembers
1580 // the location of the first empty row. (An empty row records null for its
1581 // receiver, and can be allocated for a newly-observed receiver type.)
1582 // Because there are two degrees of freedom in the state, a simple linear
1583 // search will not work; it must be a decision tree. Hence this helper
1584 // function is recursive, to generate the required tree structured code.
1585 // It's the interpreter, so we are trading off code space for speed.
1586 // See below for example code.
1587 void InterpreterMacroAssembler::record_klass_in_profile_helper(Register receiver, Register mdp,
1588 Register reg2, int start_row,
1589 Label& done) {
1590 if (TypeProfileWidth == 0) {
1591 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1592 } else {
1593 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1594 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
1595 }
1596 }
1597
1598 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, Register reg2, int start_row,
1599 Label& done, int total_rows,
1600 OffsetFunction item_offset_fn,
1601 OffsetFunction item_count_offset_fn) {
1602 int last_row = total_rows - 1;
1603 assert(start_row <= last_row, "must be work left to do");
1604 // Test this row for both the item and for null.
1605 // Take any of three different outcomes:
1606 // 1. found item => increment count and goto done
1607 // 2. found null => keep looking for case 1, maybe allocate this cell
1608 // 3. found something else => keep looking for cases 1 and 2
1609 // Case 3 is handled by a recursive call.
1610 for (int row = start_row; row <= last_row; row++) {
1611 Label next_test;
1612 bool test_for_null_also = (row == start_row);
1613
1614 // See if the item is item[n].
1615 int item_offset = in_bytes(item_offset_fn(row));
1616 test_mdp_data_at(mdp, item_offset, item,
1617 (test_for_null_also ? reg2 : noreg),
1618 next_test);
1619 // (Reg2 now contains the item from the CallData.)
1620
1621 // The item is item[n]. Increment count[n].
1622 int count_offset = in_bytes(item_count_offset_fn(row));
1623 increment_mdp_data_at(mdp, count_offset);
1624 jmp(done);
1625 bind(next_test);
1626
1627 if (test_for_null_also) {
1628 // Failed the equality check on item[n]... Test for null.
1629 testptr(reg2, reg2);
1630 if (start_row == last_row) {
1631 // The only thing left to do is handle the null case.
1632 Label found_null;
1633 jccb(Assembler::zero, found_null);
1634 // Item did not match any saved item and there is no empty row for it.
1635 // Increment total counter to indicate polymorphic case.
1636 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1637 jmp(done);
1638 bind(found_null);
1639 break;
1640 }
1641 Label found_null;
1642 // Since null is rare, make it be the branch-taken case.
1643 jcc(Assembler::zero, found_null);
1644
1645 // Put all the "Case 3" tests here.
1646 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1647 item_offset_fn, item_count_offset_fn);
1648
1649 // Found a null. Keep searching for a matching item,
1650 // but remember that this is an empty (unused) slot.
1651 bind(found_null);
1652 }
1653 }
1654
1655 // In the fall-through case, we found no matching item, but we
1656 // observed the item[start_row] is null.
1657
1658 // Fill in the item field and increment the count.
1659 int item_offset = in_bytes(item_offset_fn(start_row));
1660 set_mdp_data_at(mdp, item_offset, item);
1661 int count_offset = in_bytes(item_count_offset_fn(start_row));
1662 movl(reg2, DataLayout::counter_increment);
1663 set_mdp_data_at(mdp, count_offset, reg2);
1664 if (start_row > 0) {
1665 jmp(done);
1666 }
1667 }
1668
1669 // Example state machine code for three profile rows:
1670 // // main copy of decision tree, rooted at row[1]
1671 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1672 // if (row[0].rec != nullptr) {
1673 // // inner copy of decision tree, rooted at row[1]
1674 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1675 // if (row[1].rec != nullptr) {
1676 // // degenerate decision tree, rooted at row[2]
1677 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1678 // if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
1679 // row[2].init(rec); goto done;
1680 // } else {
1681 // // remember row[1] is empty
1682 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1683 // row[1].init(rec); goto done;
1684 // }
1685 // } else {
1686 // // remember row[0] is empty
1687 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1688 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1689 // row[0].init(rec); goto done;
1690 // }
1691 // done:
1692
1693 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, Register mdp, Register reg2) {
1694 assert(ProfileInterpreter, "must be profiling");
1695 Label done;
1696
1697 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done);
1698
1699 bind (done);
1700 }
1701
1702 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1703 Register mdp) {
1704 if (ProfileInterpreter) {
1705 Label profile_continue;
1706 uint row;
1707
1708 // If no method data exists, go to profile_continue.
1709 test_method_data_pointer(mdp, profile_continue);
1710
1711 // Update the total ret count.
1712 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1713
1714 for (row = 0; row < RetData::row_limit(); row++) {
1715 Label next_test;
1716
1717 // See if return_bci is equal to bci[n]:
1718 test_mdp_data_at(mdp,
1719 in_bytes(RetData::bci_offset(row)),
1720 return_bci, noreg,
1721 next_test);
1722
1723 // return_bci is equal to bci[n]. Increment the count.
1724 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1725
1726 // The method data pointer needs to be updated to reflect the new target.
1727 update_mdp_by_offset(mdp,
1728 in_bytes(RetData::bci_displacement_offset(row)));
1729 jmp(profile_continue);
1730 bind(next_test);
1731 }
1732
1733 update_mdp_for_ret(return_bci);
1734
1735 bind(profile_continue);
1736 }
1737 }
1738
1739
1740 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1741 if (ProfileInterpreter) {
1742 Label profile_continue;
1743
1744 // If no method data exists, go to profile_continue.
1745 test_method_data_pointer(mdp, profile_continue);
1746
1747 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1748
1749 // The method data pointer needs to be updated.
1750 int mdp_delta = in_bytes(BitData::bit_data_size());
1751 if (TypeProfileCasts) {
1752 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1753 }
1754 update_mdp_by_constant(mdp, mdp_delta);
1755
1756 bind(profile_continue);
1757 }
1758 }
1759
1760
1761 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1762 if (ProfileInterpreter) {
1763 Label profile_continue;
1764
1765 // If no method data exists, go to profile_continue.
1766 test_method_data_pointer(mdp, profile_continue);
1767
1768 // The method data pointer needs to be updated.
1769 int mdp_delta = in_bytes(BitData::bit_data_size());
1770 if (TypeProfileCasts) {
1771 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1772
1773 // Record the object type.
1774 record_klass_in_profile(klass, mdp, reg2);
1775 }
1776 update_mdp_by_constant(mdp, mdp_delta);
1777
1778 bind(profile_continue);
1779 }
1780 }
1781
1782
1783 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1784 if (ProfileInterpreter) {
1785 Label profile_continue;
1786
1787 // If no method data exists, go to profile_continue.
1788 test_method_data_pointer(mdp, profile_continue);
1789
1790 // Update the default case count
1791 increment_mdp_data_at(mdp,
1792 in_bytes(MultiBranchData::default_count_offset()));
1793
1794 // The method data pointer needs to be updated.
1795 update_mdp_by_offset(mdp,
1796 in_bytes(MultiBranchData::
1797 default_displacement_offset()));
1798
1799 bind(profile_continue);
1800 }
1801 }
1802
1803
1804 void InterpreterMacroAssembler::profile_switch_case(Register index,
1805 Register mdp,
1806 Register reg2) {
1807 if (ProfileInterpreter) {
1808 Label profile_continue;
1809
1810 // If no method data exists, go to profile_continue.
1811 test_method_data_pointer(mdp, profile_continue);
1812
1813 // Build the base (index * per_case_size_in_bytes()) +
1814 // case_array_offset_in_bytes()
1815 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1816 imulptr(index, reg2); // XXX l ?
1817 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1818
1819 // Update the case count
1820 increment_mdp_data_at(mdp,
1821 index,
1822 in_bytes(MultiBranchData::relative_count_offset()));
1823
1824 // The method data pointer needs to be updated.
1825 update_mdp_by_offset(mdp,
1826 index,
1827 in_bytes(MultiBranchData::
1828 relative_displacement_offset()));
1829
1830 bind(profile_continue);
1831 }
1832 }
1833
1834 template <class ArrayData> void InterpreterMacroAssembler::profile_array_type(Register mdp,
1835 Register array,
1836 Register tmp) {
1837 if (ProfileInterpreter) {
1838 Label profile_continue;
1839
1840 // If no method data exists, go to profile_continue.
1841 test_method_data_pointer(mdp, profile_continue);
1842
1843 mov(tmp, array);
1844 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayData::array_offset())));
1845
1846 Label not_flat;
1847 test_non_flat_array_oop(array, tmp, not_flat);
1848
1849 set_mdp_flag_at(mdp, ArrayData::flat_array_byte_constant());
1850
1851 bind(not_flat);
1852
1853 Label not_null_free;
1854 test_non_null_free_array_oop(array, tmp, not_null_free);
1855
1856 set_mdp_flag_at(mdp, ArrayData::null_free_array_byte_constant());
1857
1858 bind(not_null_free);
1859
1860 bind(profile_continue);
1861 }
1862 }
1863
1864 template void InterpreterMacroAssembler::profile_array_type<ArrayLoadData>(Register mdp,
1865 Register array,
1866 Register tmp);
1867 template void InterpreterMacroAssembler::profile_array_type<ArrayStoreData>(Register mdp,
1868 Register array,
1869 Register tmp);
1870
1871
1872 void InterpreterMacroAssembler::profile_multiple_element_types(Register mdp, Register element, Register tmp, const Register tmp2) {
1873 if (ProfileInterpreter) {
1874 Label profile_continue;
1875
1876 // If no method data exists, go to profile_continue.
1877 test_method_data_pointer(mdp, profile_continue);
1878
1879 Label done, update;
1880 testptr(element, element);
1881 jccb(Assembler::notZero, update);
1882 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1883 jmp(done);
1884
1885 bind(update);
1886 load_klass(tmp, element, rscratch1);
1887
1888 // Record the object type.
1889 record_klass_in_profile(tmp, mdp, tmp2);
1890
1891 bind(done);
1892
1893 // The method data pointer needs to be updated.
1894 update_mdp_by_constant(mdp, in_bytes(ArrayStoreData::array_store_data_size()));
1895
1896 bind(profile_continue);
1897 }
1898 }
1899
1900 void InterpreterMacroAssembler::profile_element_type(Register mdp,
1901 Register element,
1902 Register tmp) {
1903 if (ProfileInterpreter) {
1904 Label profile_continue;
1905
1906 // If no method data exists, go to profile_continue.
1907 test_method_data_pointer(mdp, profile_continue);
1908
1909 mov(tmp, element);
1910 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadData::element_offset())));
1911
1912 // The method data pointer needs to be updated.
1913 update_mdp_by_constant(mdp, in_bytes(ArrayLoadData::array_load_data_size()));
1914
1915 bind(profile_continue);
1916 }
1917 }
1918
1919 void InterpreterMacroAssembler::profile_acmp(Register mdp,
1920 Register left,
1921 Register right,
1922 Register tmp) {
1923 if (ProfileInterpreter) {
1924 Label profile_continue;
1925
1926 // If no method data exists, go to profile_continue.
1927 test_method_data_pointer(mdp, profile_continue);
1928
1929 mov(tmp, left);
1930 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::left_offset())));
1931
1932 Label left_not_inline_type;
1933 test_oop_is_not_inline_type(left, tmp, left_not_inline_type);
1934 set_mdp_flag_at(mdp, ACmpData::left_inline_type_byte_constant());
1935 bind(left_not_inline_type);
1936
1937 mov(tmp, right);
1938 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::right_offset())));
1939
1940 Label right_not_inline_type;
1941 test_oop_is_not_inline_type(right, tmp, right_not_inline_type);
1942 set_mdp_flag_at(mdp, ACmpData::right_inline_type_byte_constant());
1943 bind(right_not_inline_type);
1944
1945 bind(profile_continue);
1946 }
1947 }
1948
1949
1950 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1951 if (state == atos) {
1952 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1953 }
1954 }
1955
1956
1957 // Jump if ((*counter_addr += increment) & mask) == 0
1958 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
1959 Register scratch, Label* where) {
1960 // This update is actually not atomic and can lose a number of updates
1961 // under heavy contention, but the alternative of using the (contended)
1962 // atomic update here penalizes profiling paths too much.
1963 movl(scratch, counter_addr);
1964 incrementl(scratch, InvocationCounter::count_increment);
1965 movl(counter_addr, scratch);
1966 andl(scratch, mask);
1967 if (where != nullptr) {
1968 jcc(Assembler::zero, *where);
1969 }
1970 }
1971
1972 void InterpreterMacroAssembler::notify_method_entry() {
1973 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1974 // track stack depth. If it is possible to enter interp_only_mode we add
1975 // the code to check if the event should be sent.
1976 Register rthread = r15_thread;
1977 Register rarg = c_rarg1;
1978 if (JvmtiExport::can_post_interpreter_events()) {
1979 Label L;
1980 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1981 testl(rdx, rdx);
1982 jcc(Assembler::zero, L);
1983 call_VM(noreg, CAST_FROM_FN_PTR(address,
1984 InterpreterRuntime::post_method_entry));
1985 bind(L);
1986 }
1987
1988 if (DTraceMethodProbes) {
1989 get_method(rarg);
1990 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1991 rthread, rarg);
1992 }
1993
1994 // RedefineClasses() tracing support for obsolete method entry
1995 if (log_is_enabled(Trace, redefine, class, obsolete)) {
1996 get_method(rarg);
1997 call_VM_leaf(
1998 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1999 rthread, rarg);
2000 }
2001 }
2002
2003
2004 void InterpreterMacroAssembler::notify_method_exit(
2005 TosState state, NotifyMethodExitMode mode) {
2006 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2007 // track stack depth. If it is possible to enter interp_only_mode we add
2008 // the code to check if the event should be sent.
2009 Register rthread = r15_thread;
2010 Register rarg = c_rarg1;
2011 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2012 Label L;
2013 // Note: frame::interpreter_frame_result has a dependency on how the
2014 // method result is saved across the call to post_method_exit. If this
2015 // is changed then the interpreter_frame_result implementation will
2016 // need to be updated too.
2017
2018 // template interpreter will leave the result on the top of the stack.
2019 push(state);
2020 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2021 testl(rdx, rdx);
2022 jcc(Assembler::zero, L);
2023 call_VM(noreg,
2024 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2025 bind(L);
2026 pop(state);
2027 }
2028
2029 if (DTraceMethodProbes) {
2030 push(state);
2031 get_method(rarg);
2032 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2033 rthread, rarg);
2034 pop(state);
2035 }
2036 }
2037
2038 void InterpreterMacroAssembler::load_resolved_indy_entry(Register cache, Register index) {
2039 // Get index out of bytecode pointer
2040 get_cache_index_at_bcp(index, 1, sizeof(u4));
2041 // Get address of invokedynamic array
2042 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
2043 movptr(cache, Address(cache, in_bytes(ConstantPoolCache::invokedynamic_entries_offset())));
2044 if (is_power_of_2(sizeof(ResolvedIndyEntry))) {
2045 shll(index, log2i_exact(sizeof(ResolvedIndyEntry))); // Scale index by power of 2
2046 } else {
2047 imull(index, index, sizeof(ResolvedIndyEntry)); // Scale the index to be the entry index * sizeof(ResolvedIndyEntry)
2048 }
2049 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedIndyEntry>::base_offset_in_bytes()));
2050 }
2051
2052 void InterpreterMacroAssembler::load_field_entry(Register cache, Register index, int bcp_offset) {
2053 // Get index out of bytecode pointer
2054 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
2055 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
2056
2057 movptr(cache, Address(cache, ConstantPoolCache::field_entries_offset()));
2058 // Take shortcut if the size is a power of 2
2059 if (is_power_of_2(sizeof(ResolvedFieldEntry))) {
2060 shll(index, log2i_exact(sizeof(ResolvedFieldEntry))); // Scale index by power of 2
2061 } else {
2062 imull(index, index, sizeof(ResolvedFieldEntry)); // Scale the index to be the entry index * sizeof(ResolvedFieldEntry)
2063 }
2064 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedFieldEntry>::base_offset_in_bytes()));
2065 }
2066
2067 void InterpreterMacroAssembler::load_method_entry(Register cache, Register index, int bcp_offset) {
2068 // Get index out of bytecode pointer
2069 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
2070 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
2071
2072 movptr(cache, Address(cache, ConstantPoolCache::method_entries_offset()));
2073 imull(index, index, sizeof(ResolvedMethodEntry)); // Scale the index to be the entry index * sizeof(ResolvedMethodEntry)
2074 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedMethodEntry>::base_offset_in_bytes()));
2075 }