1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "compiler/compiler_globals.hpp"
27 #include "interp_masm_x86.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterRuntime.hpp"
30 #include "logging/log.hpp"
31 #include "oops/arrayOop.hpp"
32 #include "oops/markWord.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/method.hpp"
35 #include "oops/resolvedFieldEntry.hpp"
36 #include "oops/resolvedIndyEntry.hpp"
37 #include "oops/resolvedMethodEntry.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiThreadState.hpp"
40 #include "runtime/basicLock.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/javaThread.hpp"
43 #include "runtime/safepointMechanism.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "utilities/powerOfTwo.hpp"
46
47 // Implementation of InterpreterMacroAssembler
48
49 void InterpreterMacroAssembler::jump_to_entry(address entry) {
50 assert(entry, "Entry must have been generated by now");
51 jump(RuntimeAddress(entry));
52 }
53
54 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
55 Label update, next, none;
56
57 #ifdef _LP64
58 assert_different_registers(obj, rscratch1, mdo_addr.base(), mdo_addr.index());
59 #else
60 assert_different_registers(obj, mdo_addr.base(), mdo_addr.index());
61 #endif
62
63 interp_verify_oop(obj, atos);
64
65 testptr(obj, obj);
66 jccb(Assembler::notZero, update);
67 testptr(mdo_addr, TypeEntries::null_seen);
68 jccb(Assembler::notZero, next); // null already seen. Nothing to do anymore.
69 // atomic update to prevent overwriting Klass* with 0
70 lock();
71 orptr(mdo_addr, TypeEntries::null_seen);
72 jmpb(next);
73
74 bind(update);
75 load_klass(obj, obj, rscratch1);
76 #ifdef _LP64
77 mov(rscratch1, obj);
78 #endif
79
80 xorptr(obj, mdo_addr);
81 testptr(obj, TypeEntries::type_klass_mask);
82 jccb(Assembler::zero, next); // klass seen before, nothing to
83 // do. The unknown bit may have been
84 // set already but no need to check.
85
86 testptr(obj, TypeEntries::type_unknown);
87 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
88
89 cmpptr(mdo_addr, 0);
90 jccb(Assembler::equal, none);
91 cmpptr(mdo_addr, TypeEntries::null_seen);
92 jccb(Assembler::equal, none);
93 #ifdef _LP64
94 // There is a chance that the checks above (re-reading profiling
95 // data from memory) fail if another thread has just set the
96 // profiling to this obj's klass
97 mov(obj, rscratch1);
98 xorptr(obj, mdo_addr);
99 testptr(obj, TypeEntries::type_klass_mask);
100 jccb(Assembler::zero, next);
101 #endif
102
103 // different than before. Cannot keep accurate profile.
104 orptr(mdo_addr, TypeEntries::type_unknown);
105 jmpb(next);
106
107 bind(none);
108 // first time here. Set profile type.
109 movptr(mdo_addr, obj);
110 #ifdef ASSERT
111 andptr(obj, TypeEntries::type_klass_mask);
112 verify_klass_ptr(obj);
113 #endif
114
115 bind(next);
116 }
117
118 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
119 if (!ProfileInterpreter) {
120 return;
121 }
122
123 if (MethodData::profile_arguments() || MethodData::profile_return()) {
124 Label profile_continue;
125
126 test_method_data_pointer(mdp, profile_continue);
127
128 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
129
130 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
131 jcc(Assembler::notEqual, profile_continue);
132
133 if (MethodData::profile_arguments()) {
134 Label done;
135 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
136 addptr(mdp, off_to_args);
137
138 for (int i = 0; i < TypeProfileArgsLimit; i++) {
139 if (i > 0 || MethodData::profile_return()) {
140 // If return value type is profiled we may have no argument to profile
141 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
142 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
143 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
144 jcc(Assembler::less, done);
145 }
146 movptr(tmp, Address(callee, Method::const_offset()));
147 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
148 // stack offset o (zero based) from the start of the argument
149 // list, for n arguments translates into offset n - o - 1 from
150 // the end of the argument list
151 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
152 subl(tmp, 1);
153 Address arg_addr = argument_address(tmp);
154 movptr(tmp, arg_addr);
155
156 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
157 profile_obj_type(tmp, mdo_arg_addr);
158
159 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
160 addptr(mdp, to_add);
161 off_to_args += to_add;
162 }
163
164 if (MethodData::profile_return()) {
165 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
166 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
167 }
168
169 bind(done);
170
171 if (MethodData::profile_return()) {
172 // We're right after the type profile for the last
173 // argument. tmp is the number of cells left in the
174 // CallTypeData/VirtualCallTypeData to reach its end. Non null
175 // if there's a return to profile.
176 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
177 shll(tmp, log2i_exact((int)DataLayout::cell_size));
178 addptr(mdp, tmp);
179 }
180 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
181 } else {
182 assert(MethodData::profile_return(), "either profile call args or call ret");
183 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
184 }
185
186 // mdp points right after the end of the
187 // CallTypeData/VirtualCallTypeData, right after the cells for the
188 // return value type if there's one
189
190 bind(profile_continue);
191 }
192 }
193
194 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
195 assert_different_registers(mdp, ret, tmp, _bcp_register);
196 if (ProfileInterpreter && MethodData::profile_return()) {
197 Label profile_continue;
198
199 test_method_data_pointer(mdp, profile_continue);
200
201 if (MethodData::profile_return_jsr292_only()) {
202 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
203
204 // If we don't profile all invoke bytecodes we must make sure
205 // it's a bytecode we indeed profile. We can't go back to the
206 // beginning of the ProfileData we intend to update to check its
207 // type because we're right after it and we don't known its
208 // length
209 Label do_profile;
210 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
211 jcc(Assembler::equal, do_profile);
212 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
213 jcc(Assembler::equal, do_profile);
214 get_method(tmp);
215 cmpw(Address(tmp, Method::intrinsic_id_offset()), static_cast<int>(vmIntrinsics::_compiledLambdaForm));
216 jcc(Assembler::notEqual, profile_continue);
217
218 bind(do_profile);
219 }
220
221 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
222 mov(tmp, ret);
223 profile_obj_type(tmp, mdo_ret_addr);
224
225 bind(profile_continue);
226 }
227 }
228
229 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
230 if (ProfileInterpreter && MethodData::profile_parameters()) {
231 Label profile_continue;
232
233 test_method_data_pointer(mdp, profile_continue);
234
235 // Load the offset of the area within the MDO used for
236 // parameters. If it's negative we're not profiling any parameters
237 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
238 testl(tmp1, tmp1);
239 jcc(Assembler::negative, profile_continue);
240
241 // Compute a pointer to the area for parameters from the offset
242 // and move the pointer to the slot for the last
243 // parameters. Collect profiling from last parameter down.
244 // mdo start + parameters offset + array length - 1
245 addptr(mdp, tmp1);
246 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
247 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
248
249 Label loop;
250 bind(loop);
251
252 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
253 int type_base = in_bytes(ParametersTypeData::type_offset(0));
254 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
255 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
256 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
257
258 // load offset on the stack from the slot for this parameter
259 movptr(tmp2, arg_off);
260 negptr(tmp2);
261 // read the parameter from the local area
262 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
263
264 // profile the parameter
265 profile_obj_type(tmp2, arg_type);
266
267 // go to next parameter
268 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
269 jcc(Assembler::positive, loop);
270
271 bind(profile_continue);
272 }
273 }
274
275 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
276 int number_of_arguments) {
277 // interpreter specific
278 //
279 // Note: No need to save/restore bcp & locals registers
280 // since these are callee saved registers and no blocking/
281 // GC can happen in leaf calls.
282 // Further Note: DO NOT save/restore bcp/locals. If a caller has
283 // already saved them so that it can use rsi/rdi as temporaries
284 // then a save/restore here will DESTROY the copy the caller
285 // saved! There used to be a save_bcp() that only happened in
286 // the ASSERT path (no restore_bcp). Which caused bizarre failures
287 // when jvm built with ASSERTs.
288 #ifdef ASSERT
289 {
290 Label L;
291 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
292 jcc(Assembler::equal, L);
293 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
294 " last_sp != null");
295 bind(L);
296 }
297 #endif
298 // super call
299 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
300 // interpreter specific
301 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
302 // but since they may not have been saved (and we don't want to
303 // save them here (see note above) the assert is invalid.
304 }
305
306 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
307 Register java_thread,
308 Register last_java_sp,
309 address entry_point,
310 int number_of_arguments,
311 bool check_exceptions) {
312 // interpreter specific
313 //
314 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
315 // really make a difference for these runtime calls, since they are
316 // slow anyway. Btw., bcp must be saved/restored since it may change
317 // due to GC.
318 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
319 save_bcp();
320 #ifdef ASSERT
321 {
322 Label L;
323 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
324 jcc(Assembler::equal, L);
325 stop("InterpreterMacroAssembler::call_VM_base:"
326 " last_sp isn't null");
327 bind(L);
328 }
329 #endif /* ASSERT */
330 // super call
331 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
332 entry_point, number_of_arguments,
333 check_exceptions);
334 // interpreter specific
335 restore_bcp();
336 restore_locals();
337 }
338
339 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
340 if (JvmtiExport::can_pop_frame()) {
341 Label L;
342 // Initiate popframe handling only if it is not already being
343 // processed. If the flag has the popframe_processing bit set, it
344 // means that this code is called *during* popframe handling - we
345 // don't want to reenter.
346 // This method is only called just after the call into the vm in
347 // call_VM_base, so the arg registers are available.
348 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
349 LP64_ONLY(c_rarg0);
350 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
351 testl(pop_cond, JavaThread::popframe_pending_bit);
352 jcc(Assembler::zero, L);
353 testl(pop_cond, JavaThread::popframe_processing_bit);
354 jcc(Assembler::notZero, L);
355 // Call Interpreter::remove_activation_preserving_args_entry() to get the
356 // address of the same-named entrypoint in the generated interpreter code.
357 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
358 jmp(rax);
359 bind(L);
360 NOT_LP64(get_thread(java_thread);)
361 }
362 }
363
364 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
365 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
366 NOT_LP64(get_thread(thread);)
367 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
368 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
369 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
370 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
371 #ifdef _LP64
372 switch (state) {
373 case atos: movptr(rax, oop_addr);
374 movptr(oop_addr, NULL_WORD);
375 interp_verify_oop(rax, state); break;
376 case ltos: movptr(rax, val_addr); break;
377 case btos: // fall through
378 case ztos: // fall through
379 case ctos: // fall through
380 case stos: // fall through
381 case itos: movl(rax, val_addr); break;
382 case ftos: load_float(val_addr); break;
383 case dtos: load_double(val_addr); break;
384 case vtos: /* nothing to do */ break;
385 default : ShouldNotReachHere();
386 }
387 // Clean up tos value in the thread object
388 movl(tos_addr, ilgl);
389 movl(val_addr, NULL_WORD);
390 #else
391 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
392 + in_ByteSize(wordSize));
393 switch (state) {
394 case atos: movptr(rax, oop_addr);
395 movptr(oop_addr, NULL_WORD);
396 interp_verify_oop(rax, state); break;
397 case ltos:
398 movl(rdx, val_addr1); // fall through
399 case btos: // fall through
400 case ztos: // fall through
401 case ctos: // fall through
402 case stos: // fall through
403 case itos: movl(rax, val_addr); break;
404 case ftos: load_float(val_addr); break;
405 case dtos: load_double(val_addr); break;
406 case vtos: /* nothing to do */ break;
407 default : ShouldNotReachHere();
408 }
409 #endif // _LP64
410 // Clean up tos value in the thread object
411 movl(tos_addr, ilgl);
412 movptr(val_addr, NULL_WORD);
413 NOT_LP64(movptr(val_addr1, NULL_WORD);)
414 }
415
416
417 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
418 if (JvmtiExport::can_force_early_return()) {
419 Label L;
420 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
421 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
422
423 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
424 testptr(tmp, tmp);
425 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == nullptr) exit;
426
427 // Initiate earlyret handling only if it is not already being processed.
428 // If the flag has the earlyret_processing bit set, it means that this code
429 // is called *during* earlyret handling - we don't want to reenter.
430 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
431 cmpl(tmp, JvmtiThreadState::earlyret_pending);
432 jcc(Assembler::notEqual, L);
433
434 // Call Interpreter::remove_activation_early_entry() to get the address of the
435 // same-named entrypoint in the generated interpreter code.
436 NOT_LP64(get_thread(java_thread);)
437 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
438 #ifdef _LP64
439 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
440 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
441 #else
442 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
443 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
444 #endif // _LP64
445 jmp(rax);
446 bind(L);
447 NOT_LP64(get_thread(java_thread);)
448 }
449 }
450
451 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
452 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
453 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
454 bswapl(reg);
455 shrl(reg, 16);
456 }
457
458 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
459 int bcp_offset,
460 size_t index_size) {
461 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
462 if (index_size == sizeof(u2)) {
463 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
464 } else if (index_size == sizeof(u4)) {
465 movl(index, Address(_bcp_register, bcp_offset));
466 } else if (index_size == sizeof(u1)) {
467 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
468 } else {
469 ShouldNotReachHere();
470 }
471 }
472
473 // Load object from cpool->resolved_references(index)
474 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result,
475 Register index,
476 Register tmp) {
477 assert_different_registers(result, index);
478
479 get_constant_pool(result);
480 // load pointer for resolved_references[] objArray
481 movptr(result, Address(result, ConstantPool::cache_offset()));
482 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset()));
483 resolve_oop_handle(result, tmp);
484 load_heap_oop(result, Address(result, index,
485 UseCompressedOops ? Address::times_4 : Address::times_ptr,
486 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
487 }
488
489 // load cpool->resolved_klass_at(index)
490 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass,
491 Register cpool,
492 Register index) {
493 assert_different_registers(cpool, index);
494
495 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
496 Register resolved_klasses = cpool;
497 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset()));
498 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
499 }
500
501 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
502 // subtype of super_klass.
503 //
504 // Args:
505 // rax: superklass
506 // Rsub_klass: subklass
507 //
508 // Kills:
509 // rcx, rdi
510 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
511 Label& ok_is_subtype) {
512 assert(Rsub_klass != rax, "rax holds superklass");
513 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
514 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
515 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
516 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
517
518 // Profile the not-null value's klass.
519 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
520
521 // Do the check.
522 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
523 }
524
525
526 #ifndef _LP64
527 void InterpreterMacroAssembler::f2ieee() {
528 if (IEEEPrecision) {
529 fstp_s(Address(rsp, 0));
530 fld_s(Address(rsp, 0));
531 }
532 }
533
534
535 void InterpreterMacroAssembler::d2ieee() {
536 if (IEEEPrecision) {
537 fstp_d(Address(rsp, 0));
538 fld_d(Address(rsp, 0));
539 }
540 }
541 #endif // _LP64
542
543 // Java Expression Stack
544
545 void InterpreterMacroAssembler::pop_ptr(Register r) {
546 pop(r);
547 }
548
549 void InterpreterMacroAssembler::push_ptr(Register r) {
550 push(r);
551 }
552
553 void InterpreterMacroAssembler::push_i(Register r) {
554 push(r);
555 }
556
557 void InterpreterMacroAssembler::push_i_or_ptr(Register r) {
558 push(r);
559 }
560
561 void InterpreterMacroAssembler::push_f(XMMRegister r) {
562 subptr(rsp, wordSize);
563 movflt(Address(rsp, 0), r);
564 }
565
566 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
567 movflt(r, Address(rsp, 0));
568 addptr(rsp, wordSize);
569 }
570
571 void InterpreterMacroAssembler::push_d(XMMRegister r) {
572 subptr(rsp, 2 * wordSize);
573 movdbl(Address(rsp, 0), r);
574 }
575
576 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
577 movdbl(r, Address(rsp, 0));
578 addptr(rsp, 2 * Interpreter::stackElementSize);
579 }
580
581 #ifdef _LP64
582 void InterpreterMacroAssembler::pop_i(Register r) {
583 // XXX can't use pop currently, upper half non clean
584 movl(r, Address(rsp, 0));
585 addptr(rsp, wordSize);
586 }
587
588 void InterpreterMacroAssembler::pop_l(Register r) {
589 movq(r, Address(rsp, 0));
590 addptr(rsp, 2 * Interpreter::stackElementSize);
591 }
592
593 void InterpreterMacroAssembler::push_l(Register r) {
594 subptr(rsp, 2 * wordSize);
595 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
596 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
597 }
598
599 void InterpreterMacroAssembler::pop(TosState state) {
600 switch (state) {
601 case atos: pop_ptr(); break;
602 case btos:
603 case ztos:
604 case ctos:
605 case stos:
606 case itos: pop_i(); break;
607 case ltos: pop_l(); break;
608 case ftos: pop_f(xmm0); break;
609 case dtos: pop_d(xmm0); break;
610 case vtos: /* nothing to do */ break;
611 default: ShouldNotReachHere();
612 }
613 interp_verify_oop(rax, state);
614 }
615
616 void InterpreterMacroAssembler::push(TosState state) {
617 interp_verify_oop(rax, state);
618 switch (state) {
619 case atos: push_ptr(); break;
620 case btos:
621 case ztos:
622 case ctos:
623 case stos:
624 case itos: push_i(); break;
625 case ltos: push_l(); break;
626 case ftos: push_f(xmm0); break;
627 case dtos: push_d(xmm0); break;
628 case vtos: /* nothing to do */ break;
629 default : ShouldNotReachHere();
630 }
631 }
632 #else
633 void InterpreterMacroAssembler::pop_i(Register r) {
634 pop(r);
635 }
636
637 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
638 pop(lo);
639 pop(hi);
640 }
641
642 void InterpreterMacroAssembler::pop_f() {
643 fld_s(Address(rsp, 0));
644 addptr(rsp, 1 * wordSize);
645 }
646
647 void InterpreterMacroAssembler::pop_d() {
648 fld_d(Address(rsp, 0));
649 addptr(rsp, 2 * wordSize);
650 }
651
652
653 void InterpreterMacroAssembler::pop(TosState state) {
654 switch (state) {
655 case atos: pop_ptr(rax); break;
656 case btos: // fall through
657 case ztos: // fall through
658 case ctos: // fall through
659 case stos: // fall through
660 case itos: pop_i(rax); break;
661 case ltos: pop_l(rax, rdx); break;
662 case ftos:
663 if (UseSSE >= 1) {
664 pop_f(xmm0);
665 } else {
666 pop_f();
667 }
668 break;
669 case dtos:
670 if (UseSSE >= 2) {
671 pop_d(xmm0);
672 } else {
673 pop_d();
674 }
675 break;
676 case vtos: /* nothing to do */ break;
677 default : ShouldNotReachHere();
678 }
679 interp_verify_oop(rax, state);
680 }
681
682
683 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
684 push(hi);
685 push(lo);
686 }
687
688 void InterpreterMacroAssembler::push_f() {
689 // Do not schedule for no AGI! Never write beyond rsp!
690 subptr(rsp, 1 * wordSize);
691 fstp_s(Address(rsp, 0));
692 }
693
694 void InterpreterMacroAssembler::push_d() {
695 // Do not schedule for no AGI! Never write beyond rsp!
696 subptr(rsp, 2 * wordSize);
697 fstp_d(Address(rsp, 0));
698 }
699
700
701 void InterpreterMacroAssembler::push(TosState state) {
702 interp_verify_oop(rax, state);
703 switch (state) {
704 case atos: push_ptr(rax); break;
705 case btos: // fall through
706 case ztos: // fall through
707 case ctos: // fall through
708 case stos: // fall through
709 case itos: push_i(rax); break;
710 case ltos: push_l(rax, rdx); break;
711 case ftos:
712 if (UseSSE >= 1) {
713 push_f(xmm0);
714 } else {
715 push_f();
716 }
717 break;
718 case dtos:
719 if (UseSSE >= 2) {
720 push_d(xmm0);
721 } else {
722 push_d();
723 }
724 break;
725 case vtos: /* nothing to do */ break;
726 default : ShouldNotReachHere();
727 }
728 }
729 #endif // _LP64
730
731
732 // Helpers for swap and dup
733 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
734 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
735 }
736
737 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
738 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
739 }
740
741
742 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
743 // set sender sp
744 lea(_bcp_register, Address(rsp, wordSize));
745 // record last_sp
746 mov(rcx, _bcp_register);
747 subptr(rcx, rbp);
748 sarptr(rcx, LogBytesPerWord);
749 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rcx);
750 }
751
752
753 // Jump to from_interpreted entry of a call unless single stepping is possible
754 // in this thread in which case we must call the i2i entry
755 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
756 prepare_to_jump_from_interpreted();
757
758 if (JvmtiExport::can_post_interpreter_events()) {
759 Label run_compiled_code;
760 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
761 // compiled code in threads for which the event is enabled. Check here for
762 // interp_only_mode if these events CAN be enabled.
763 // interp_only is an int, on little endian it is sufficient to test the byte only
764 // Is a cmpl faster?
765 LP64_ONLY(temp = r15_thread;)
766 NOT_LP64(get_thread(temp);)
767 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
768 jccb(Assembler::zero, run_compiled_code);
769 jmp(Address(method, Method::interpreter_entry_offset()));
770 bind(run_compiled_code);
771 }
772
773 jmp(Address(method, Method::from_interpreted_offset()));
774 }
775
776 // The following two routines provide a hook so that an implementation
777 // can schedule the dispatch in two parts. x86 does not do this.
778 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
779 // Nothing x86 specific to be done here
780 }
781
782 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
783 dispatch_next(state, step);
784 }
785
786 void InterpreterMacroAssembler::dispatch_base(TosState state,
787 address* table,
788 bool verifyoop,
789 bool generate_poll) {
790 verify_FPU(1, state);
791 if (VerifyActivationFrameSize) {
792 Label L;
793 mov(rcx, rbp);
794 subptr(rcx, rsp);
795 int32_t min_frame_size =
796 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
797 wordSize;
798 cmpptr(rcx, min_frame_size);
799 jcc(Assembler::greaterEqual, L);
800 stop("broken stack frame");
801 bind(L);
802 }
803 if (verifyoop) {
804 interp_verify_oop(rax, state);
805 }
806
807 address* const safepoint_table = Interpreter::safept_table(state);
808 #ifdef _LP64
809 Label no_safepoint, dispatch;
810 if (table != safepoint_table && generate_poll) {
811 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
812 testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
813
814 jccb(Assembler::zero, no_safepoint);
815 lea(rscratch1, ExternalAddress((address)safepoint_table));
816 jmpb(dispatch);
817 }
818
819 bind(no_safepoint);
820 lea(rscratch1, ExternalAddress((address)table));
821 bind(dispatch);
822 jmp(Address(rscratch1, rbx, Address::times_8));
823
824 #else
825 Address index(noreg, rbx, Address::times_ptr);
826 if (table != safepoint_table && generate_poll) {
827 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
828 Label no_safepoint;
829 const Register thread = rcx;
830 get_thread(thread);
831 testb(Address(thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
832
833 jccb(Assembler::zero, no_safepoint);
834 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
835 jump(dispatch_addr, noreg);
836 bind(no_safepoint);
837 }
838
839 {
840 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
841 jump(dispatch_addr, noreg);
842 }
843 #endif // _LP64
844 }
845
846 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
847 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
848 }
849
850 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
851 dispatch_base(state, Interpreter::normal_table(state));
852 }
853
854 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
855 dispatch_base(state, Interpreter::normal_table(state), false);
856 }
857
858
859 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
860 // load next bytecode (load before advancing _bcp_register to prevent AGI)
861 load_unsigned_byte(rbx, Address(_bcp_register, step));
862 // advance _bcp_register
863 increment(_bcp_register, step);
864 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
865 }
866
867 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
868 // load current bytecode
869 load_unsigned_byte(rbx, Address(_bcp_register, 0));
870 dispatch_base(state, table);
871 }
872
873 void InterpreterMacroAssembler::narrow(Register result) {
874
875 // Get method->_constMethod->_result_type
876 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
877 movptr(rcx, Address(rcx, Method::const_offset()));
878 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
879
880 Label done, notBool, notByte, notChar;
881
882 // common case first
883 cmpl(rcx, T_INT);
884 jcc(Assembler::equal, done);
885
886 // mask integer result to narrower return type.
887 cmpl(rcx, T_BOOLEAN);
888 jcc(Assembler::notEqual, notBool);
889 andl(result, 0x1);
890 jmp(done);
891
892 bind(notBool);
893 cmpl(rcx, T_BYTE);
894 jcc(Assembler::notEqual, notByte);
895 LP64_ONLY(movsbl(result, result);)
896 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
897 NOT_LP64(sarl(result, 24);) // and sign-extend byte
898 jmp(done);
899
900 bind(notByte);
901 cmpl(rcx, T_CHAR);
902 jcc(Assembler::notEqual, notChar);
903 LP64_ONLY(movzwl(result, result);)
904 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
905 jmp(done);
906
907 bind(notChar);
908 // cmpl(rcx, T_SHORT); // all that's left
909 // jcc(Assembler::notEqual, done);
910 LP64_ONLY(movswl(result, result);)
911 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
912 NOT_LP64(sarl(result, 16);) // and sign-extend short
913
914 // Nothing to do for T_INT
915 bind(done);
916 }
917
918 // remove activation
919 //
920 // Apply stack watermark barrier.
921 // Unlock the receiver if this is a synchronized method.
922 // Unlock any Java monitors from synchronized blocks.
923 // Remove the activation from the stack.
924 //
925 // If there are locked Java monitors
926 // If throw_monitor_exception
927 // throws IllegalMonitorStateException
928 // Else if install_monitor_exception
929 // installs IllegalMonitorStateException
930 // Else
931 // no error processing
932 void InterpreterMacroAssembler::remove_activation(
933 TosState state,
934 Register ret_addr,
935 bool throw_monitor_exception,
936 bool install_monitor_exception,
937 bool notify_jvmdi) {
938 // Note: Registers rdx xmm0 may be in use for the
939 // result check if synchronized method
940 Label unlocked, unlock, no_unlock;
941
942 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
943 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
944 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
945 // monitor pointers need different register
946 // because rdx may have the result in it
947 NOT_LP64(get_thread(rthread);)
948
949 // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
950 // that would normally not be safe to use. Such bad returns into unsafe territory of
951 // the stack, will call InterpreterRuntime::at_unwind.
952 Label slow_path;
953 Label fast_path;
954 safepoint_poll(slow_path, rthread, true /* at_return */, false /* in_nmethod */);
955 jmp(fast_path);
956 bind(slow_path);
957 push(state);
958 set_last_Java_frame(rthread, noreg, rbp, (address)pc(), rscratch1);
959 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
960 NOT_LP64(get_thread(rthread);) // call_VM clobbered it, restore
961 reset_last_Java_frame(rthread, true);
962 pop(state);
963 bind(fast_path);
964
965 // get the value of _do_not_unlock_if_synchronized into rdx
966 const Address do_not_unlock_if_synchronized(rthread,
967 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
968 movbool(rbx, do_not_unlock_if_synchronized);
969 movbool(do_not_unlock_if_synchronized, false); // reset the flag
970
971 // get method access flags
972 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
973 movl(rcx, Address(rcx, Method::access_flags_offset()));
974 testl(rcx, JVM_ACC_SYNCHRONIZED);
975 jcc(Assembler::zero, unlocked);
976
977 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
978 // is set.
979 testbool(rbx);
980 jcc(Assembler::notZero, no_unlock);
981
982 // unlock monitor
983 push(state); // save result
984
985 // BasicObjectLock will be first in list, since this is a
986 // synchronized method. However, need to check that the object has
987 // not been unlocked by an explicit monitorexit bytecode.
988 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
989 wordSize - (int) sizeof(BasicObjectLock));
990 // We use c_rarg1/rdx so that if we go slow path it will be the correct
991 // register for unlock_object to pass to VM directly
992 lea(robj, monitor); // address of first monitor
993
994 movptr(rax, Address(robj, BasicObjectLock::obj_offset()));
995 testptr(rax, rax);
996 jcc(Assembler::notZero, unlock);
997
998 pop(state);
999 if (throw_monitor_exception) {
1000 // Entry already unlocked, need to throw exception
1001 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1002 call_VM(noreg, CAST_FROM_FN_PTR(address,
1003 InterpreterRuntime::throw_illegal_monitor_state_exception));
1004 should_not_reach_here();
1005 } else {
1006 // Monitor already unlocked during a stack unroll. If requested,
1007 // install an illegal_monitor_state_exception. Continue with
1008 // stack unrolling.
1009 if (install_monitor_exception) {
1010 NOT_LP64(empty_FPU_stack();)
1011 call_VM(noreg, CAST_FROM_FN_PTR(address,
1012 InterpreterRuntime::new_illegal_monitor_state_exception));
1013 }
1014 jmp(unlocked);
1015 }
1016
1017 bind(unlock);
1018 unlock_object(robj);
1019 pop(state);
1020
1021 // Check that for block-structured locking (i.e., that all locked
1022 // objects has been unlocked)
1023 bind(unlocked);
1024
1025 // rax, rdx: Might contain return value
1026
1027 // Check that all monitors are unlocked
1028 {
1029 Label loop, exception, entry, restart;
1030 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
1031 const Address monitor_block_top(
1032 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1033 const Address monitor_block_bot(
1034 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1035
1036 bind(restart);
1037 // We use c_rarg1 so that if we go slow path it will be the correct
1038 // register for unlock_object to pass to VM directly
1039 movptr(rmon, monitor_block_top); // derelativize pointer
1040 lea(rmon, Address(rbp, rmon, Address::times_ptr));
1041 // c_rarg1 points to current entry, starting with top-most entry
1042
1043 lea(rbx, monitor_block_bot); // points to word before bottom of
1044 // monitor block
1045 jmp(entry);
1046
1047 // Entry already locked, need to throw exception
1048 bind(exception);
1049
1050 if (throw_monitor_exception) {
1051 // Throw exception
1052 NOT_LP64(empty_FPU_stack();)
1053 MacroAssembler::call_VM(noreg,
1054 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1055 throw_illegal_monitor_state_exception));
1056 should_not_reach_here();
1057 } else {
1058 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1059 // Unlock does not block, so don't have to worry about the frame.
1060 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1061
1062 push(state);
1063 mov(robj, rmon); // nop if robj and rmon are the same
1064 unlock_object(robj);
1065 pop(state);
1066
1067 if (install_monitor_exception) {
1068 NOT_LP64(empty_FPU_stack();)
1069 call_VM(noreg, CAST_FROM_FN_PTR(address,
1070 InterpreterRuntime::
1071 new_illegal_monitor_state_exception));
1072 }
1073
1074 jmp(restart);
1075 }
1076
1077 bind(loop);
1078 // check if current entry is used
1079 cmpptr(Address(rmon, BasicObjectLock::obj_offset()), NULL_WORD);
1080 jcc(Assembler::notEqual, exception);
1081
1082 addptr(rmon, entry_size); // otherwise advance to next entry
1083 bind(entry);
1084 cmpptr(rmon, rbx); // check if bottom reached
1085 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1086 }
1087
1088 bind(no_unlock);
1089
1090 // jvmti support
1091 if (notify_jvmdi) {
1092 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1093 } else {
1094 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1095 }
1096
1097 // remove activation
1098 // get sender sp
1099 movptr(rbx,
1100 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1101 if (StackReservedPages > 0) {
1102 // testing if reserved zone needs to be re-enabled
1103 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1104 Label no_reserved_zone_enabling;
1105
1106 NOT_LP64(get_thread(rthread);)
1107
1108 // check if already enabled - if so no re-enabling needed
1109 assert(sizeof(StackOverflow::StackGuardState) == 4, "unexpected size");
1110 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
1111 jcc(Assembler::equal, no_reserved_zone_enabling);
1112
1113 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1114 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1115
1116 call_VM_leaf(
1117 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1118 call_VM(noreg, CAST_FROM_FN_PTR(address,
1119 InterpreterRuntime::throw_delayed_StackOverflowError));
1120 should_not_reach_here();
1121
1122 bind(no_reserved_zone_enabling);
1123 }
1124 leave(); // remove frame anchor
1125 pop(ret_addr); // get return address
1126 mov(rsp, rbx); // set sp to sender sp
1127 pop_cont_fastpath();
1128 }
1129
1130 void InterpreterMacroAssembler::get_method_counters(Register method,
1131 Register mcs, Label& skip) {
1132 Label has_counters;
1133 movptr(mcs, Address(method, Method::method_counters_offset()));
1134 testptr(mcs, mcs);
1135 jcc(Assembler::notZero, has_counters);
1136 call_VM(noreg, CAST_FROM_FN_PTR(address,
1137 InterpreterRuntime::build_method_counters), method);
1138 movptr(mcs, Address(method,Method::method_counters_offset()));
1139 testptr(mcs, mcs);
1140 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1141 bind(has_counters);
1142 }
1143
1144
1145 // Lock object
1146 //
1147 // Args:
1148 // rdx, c_rarg1: BasicObjectLock to be used for locking
1149 //
1150 // Kills:
1151 // rax, rbx
1152 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1153 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1154 "The argument is only for looks. It must be c_rarg1");
1155
1156 if (LockingMode == LM_MONITOR) {
1157 call_VM(noreg,
1158 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1159 lock_reg);
1160 } else {
1161 Label count_locking, done, slow_case;
1162
1163 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1164 const Register tmp_reg = rbx;
1165 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1166 const Register rklass_decode_tmp = rscratch1;
1167
1168 const int obj_offset = in_bytes(BasicObjectLock::obj_offset());
1169 const int lock_offset = in_bytes(BasicObjectLock::lock_offset());
1170 const int mark_offset = lock_offset +
1171 BasicLock::displaced_header_offset_in_bytes();
1172
1173 // Load object pointer into obj_reg
1174 movptr(obj_reg, Address(lock_reg, obj_offset));
1175
1176 if (DiagnoseSyncOnValueBasedClasses != 0) {
1177 load_klass(tmp_reg, obj_reg, rklass_decode_tmp);
1178 testb(Address(tmp_reg, Klass::misc_flags_offset()), KlassFlags::_misc_is_value_based_class);
1179 jcc(Assembler::notZero, slow_case);
1180 }
1181
1182 if (LockingMode == LM_LIGHTWEIGHT) {
1183 #ifdef _LP64
1184 const Register thread = r15_thread;
1185 lightweight_lock(lock_reg, obj_reg, swap_reg, thread, tmp_reg, slow_case);
1186 #else
1187 // Lacking registers and thread on x86_32. Always take slow path.
1188 jmp(slow_case);
1189 #endif
1190 } else if (LockingMode == LM_LEGACY) {
1191 // Load immediate 1 into swap_reg %rax
1192 movl(swap_reg, 1);
1193
1194 // Load (object->mark() | 1) into swap_reg %rax
1195 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1196
1197 // Save (object->mark() | 1) into BasicLock's displaced header
1198 movptr(Address(lock_reg, mark_offset), swap_reg);
1199
1200 assert(lock_offset == 0,
1201 "displaced header must be first word in BasicObjectLock");
1202
1203 lock();
1204 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1205 jcc(Assembler::zero, count_locking);
1206
1207 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1208
1209 // Fast check for recursive lock.
1210 //
1211 // Can apply the optimization only if this is a stack lock
1212 // allocated in this thread. For efficiency, we can focus on
1213 // recently allocated stack locks (instead of reading the stack
1214 // base and checking whether 'mark' points inside the current
1215 // thread stack):
1216 // 1) (mark & zero_bits) == 0, and
1217 // 2) rsp <= mark < mark + os::pagesize()
1218 //
1219 // Warning: rsp + os::pagesize can overflow the stack base. We must
1220 // neither apply the optimization for an inflated lock allocated
1221 // just above the thread stack (this is why condition 1 matters)
1222 // nor apply the optimization if the stack lock is inside the stack
1223 // of another thread. The latter is avoided even in case of overflow
1224 // because we have guard pages at the end of all stacks. Hence, if
1225 // we go over the stack base and hit the stack of another thread,
1226 // this should not be in a writeable area that could contain a
1227 // stack lock allocated by that thread. As a consequence, a stack
1228 // lock less than page size away from rsp is guaranteed to be
1229 // owned by the current thread.
1230 //
1231 // These 3 tests can be done by evaluating the following
1232 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1233 // assuming both stack pointer and pagesize have their
1234 // least significant bits clear.
1235 // NOTE: the mark is in swap_reg %rax as the result of cmpxchg
1236 subptr(swap_reg, rsp);
1237 andptr(swap_reg, zero_bits - (int)os::vm_page_size());
1238
1239 // Save the test result, for recursive case, the result is zero
1240 movptr(Address(lock_reg, mark_offset), swap_reg);
1241 jcc(Assembler::notZero, slow_case);
1242
1243 bind(count_locking);
1244 }
1245 inc_held_monitor_count();
1246 jmp(done);
1247
1248 bind(slow_case);
1249
1250 // Call the runtime routine for slow case
1251 call_VM(noreg,
1252 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1253 lock_reg);
1254 bind(done);
1255 }
1256 }
1257
1258
1259 // Unlocks an object. Used in monitorexit bytecode and
1260 // remove_activation. Throws an IllegalMonitorException if object is
1261 // not locked by current thread.
1262 //
1263 // Args:
1264 // rdx, c_rarg1: BasicObjectLock for lock
1265 //
1266 // Kills:
1267 // rax
1268 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1269 // rscratch1 (scratch reg)
1270 // rax, rbx, rcx, rdx
1271 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1272 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1273 "The argument is only for looks. It must be c_rarg1");
1274
1275 if (LockingMode == LM_MONITOR) {
1276 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1277 } else {
1278 Label count_locking, done, slow_case;
1279
1280 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1281 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1282 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1283
1284 save_bcp(); // Save in case of exception
1285
1286 if (LockingMode != LM_LIGHTWEIGHT) {
1287 // Convert from BasicObjectLock structure to object and BasicLock
1288 // structure Store the BasicLock address into %rax
1289 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset()));
1290 }
1291
1292 // Load oop into obj_reg(%c_rarg3)
1293 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset()));
1294
1295 // Free entry
1296 movptr(Address(lock_reg, BasicObjectLock::obj_offset()), NULL_WORD);
1297
1298 if (LockingMode == LM_LIGHTWEIGHT) {
1299 #ifdef _LP64
1300 lightweight_unlock(obj_reg, swap_reg, r15_thread, header_reg, slow_case);
1301 #else
1302 // Lacking registers and thread on x86_32. Always take slow path.
1303 jmp(slow_case);
1304 #endif
1305 } else if (LockingMode == LM_LEGACY) {
1306 // Load the old header from BasicLock structure
1307 movptr(header_reg, Address(swap_reg,
1308 BasicLock::displaced_header_offset_in_bytes()));
1309
1310 // Test for recursion
1311 testptr(header_reg, header_reg);
1312
1313 // zero for recursive case
1314 jcc(Assembler::zero, count_locking);
1315
1316 // Atomic swap back the old header
1317 lock();
1318 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1319
1320 // zero for simple unlock of a stack-lock case
1321 jcc(Assembler::notZero, slow_case);
1322
1323 bind(count_locking);
1324 }
1325 dec_held_monitor_count();
1326 jmp(done);
1327
1328 bind(slow_case);
1329 // Call the runtime routine for slow case.
1330 movptr(Address(lock_reg, BasicObjectLock::obj_offset()), obj_reg); // restore obj
1331 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1332
1333 bind(done);
1334
1335 restore_bcp();
1336 }
1337 }
1338
1339 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1340 Label& zero_continue) {
1341 assert(ProfileInterpreter, "must be profiling interpreter");
1342 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1343 testptr(mdp, mdp);
1344 jcc(Assembler::zero, zero_continue);
1345 }
1346
1347
1348 // Set the method data pointer for the current bcp.
1349 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1350 assert(ProfileInterpreter, "must be profiling interpreter");
1351 Label set_mdp;
1352 push(rax);
1353 push(rbx);
1354
1355 get_method(rbx);
1356 // Test MDO to avoid the call if it is null.
1357 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1358 testptr(rax, rax);
1359 jcc(Assembler::zero, set_mdp);
1360 // rbx: method
1361 // _bcp_register: bcp
1362 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1363 // rax: mdi
1364 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1365 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1366 addptr(rbx, in_bytes(MethodData::data_offset()));
1367 addptr(rax, rbx);
1368 bind(set_mdp);
1369 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1370 pop(rbx);
1371 pop(rax);
1372 }
1373
1374 void InterpreterMacroAssembler::verify_method_data_pointer() {
1375 assert(ProfileInterpreter, "must be profiling interpreter");
1376 #ifdef ASSERT
1377 Label verify_continue;
1378 push(rax);
1379 push(rbx);
1380 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1381 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1382 push(arg3_reg);
1383 push(arg2_reg);
1384 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1385 get_method(rbx);
1386
1387 // If the mdp is valid, it will point to a DataLayout header which is
1388 // consistent with the bcp. The converse is highly probable also.
1389 load_unsigned_short(arg2_reg,
1390 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1391 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1392 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1393 cmpptr(arg2_reg, _bcp_register);
1394 jcc(Assembler::equal, verify_continue);
1395 // rbx: method
1396 // _bcp_register: bcp
1397 // c_rarg3: mdp
1398 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1399 rbx, _bcp_register, arg3_reg);
1400 bind(verify_continue);
1401 pop(arg2_reg);
1402 pop(arg3_reg);
1403 pop(rbx);
1404 pop(rax);
1405 #endif // ASSERT
1406 }
1407
1408
1409 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1410 int constant,
1411 Register value) {
1412 assert(ProfileInterpreter, "must be profiling interpreter");
1413 Address data(mdp_in, constant);
1414 movptr(data, value);
1415 }
1416
1417
1418 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1419 int constant,
1420 bool decrement) {
1421 // Counter address
1422 Address data(mdp_in, constant);
1423
1424 increment_mdp_data_at(data, decrement);
1425 }
1426
1427 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1428 bool decrement) {
1429 assert(ProfileInterpreter, "must be profiling interpreter");
1430 // %%% this does 64bit counters at best it is wasting space
1431 // at worst it is a rare bug when counters overflow
1432
1433 if (decrement) {
1434 // Decrement the register. Set condition codes.
1435 addptr(data, -DataLayout::counter_increment);
1436 // If the decrement causes the counter to overflow, stay negative
1437 Label L;
1438 jcc(Assembler::negative, L);
1439 addptr(data, DataLayout::counter_increment);
1440 bind(L);
1441 } else {
1442 assert(DataLayout::counter_increment == 1,
1443 "flow-free idiom only works with 1");
1444 // Increment the register. Set carry flag.
1445 addptr(data, DataLayout::counter_increment);
1446 // If the increment causes the counter to overflow, pull back by 1.
1447 sbbptr(data, 0);
1448 }
1449 }
1450
1451
1452 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1453 Register reg,
1454 int constant,
1455 bool decrement) {
1456 Address data(mdp_in, reg, Address::times_1, constant);
1457
1458 increment_mdp_data_at(data, decrement);
1459 }
1460
1461 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1462 int flag_byte_constant) {
1463 assert(ProfileInterpreter, "must be profiling interpreter");
1464 int header_offset = in_bytes(DataLayout::flags_offset());
1465 int header_bits = flag_byte_constant;
1466 // Set the flag
1467 orb(Address(mdp_in, header_offset), header_bits);
1468 }
1469
1470
1471
1472 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1473 int offset,
1474 Register value,
1475 Register test_value_out,
1476 Label& not_equal_continue) {
1477 assert(ProfileInterpreter, "must be profiling interpreter");
1478 if (test_value_out == noreg) {
1479 cmpptr(value, Address(mdp_in, offset));
1480 } else {
1481 // Put the test value into a register, so caller can use it:
1482 movptr(test_value_out, Address(mdp_in, offset));
1483 cmpptr(test_value_out, value);
1484 }
1485 jcc(Assembler::notEqual, not_equal_continue);
1486 }
1487
1488
1489 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1490 int offset_of_disp) {
1491 assert(ProfileInterpreter, "must be profiling interpreter");
1492 Address disp_address(mdp_in, offset_of_disp);
1493 addptr(mdp_in, disp_address);
1494 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1495 }
1496
1497
1498 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1499 Register reg,
1500 int offset_of_disp) {
1501 assert(ProfileInterpreter, "must be profiling interpreter");
1502 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1503 addptr(mdp_in, disp_address);
1504 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1505 }
1506
1507
1508 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1509 int constant) {
1510 assert(ProfileInterpreter, "must be profiling interpreter");
1511 addptr(mdp_in, constant);
1512 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1513 }
1514
1515
1516 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1517 assert(ProfileInterpreter, "must be profiling interpreter");
1518 push(return_bci); // save/restore across call_VM
1519 call_VM(noreg,
1520 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1521 return_bci);
1522 pop(return_bci);
1523 }
1524
1525
1526 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1527 Register bumped_count) {
1528 if (ProfileInterpreter) {
1529 Label profile_continue;
1530
1531 // If no method data exists, go to profile_continue.
1532 // Otherwise, assign to mdp
1533 test_method_data_pointer(mdp, profile_continue);
1534
1535 // We are taking a branch. Increment the taken count.
1536 // We inline increment_mdp_data_at to return bumped_count in a register
1537 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1538 Address data(mdp, in_bytes(JumpData::taken_offset()));
1539 movptr(bumped_count, data);
1540 assert(DataLayout::counter_increment == 1,
1541 "flow-free idiom only works with 1");
1542 addptr(bumped_count, DataLayout::counter_increment);
1543 sbbptr(bumped_count, 0);
1544 movptr(data, bumped_count); // Store back out
1545
1546 // The method data pointer needs to be updated to reflect the new target.
1547 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1548 bind(profile_continue);
1549 }
1550 }
1551
1552
1553 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1554 if (ProfileInterpreter) {
1555 Label profile_continue;
1556
1557 // If no method data exists, go to profile_continue.
1558 test_method_data_pointer(mdp, profile_continue);
1559
1560 // We are taking a branch. Increment the not taken count.
1561 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1562
1563 // The method data pointer needs to be updated to correspond to
1564 // the next bytecode
1565 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1566 bind(profile_continue);
1567 }
1568 }
1569
1570 void InterpreterMacroAssembler::profile_call(Register mdp) {
1571 if (ProfileInterpreter) {
1572 Label profile_continue;
1573
1574 // If no method data exists, go to profile_continue.
1575 test_method_data_pointer(mdp, profile_continue);
1576
1577 // We are making a call. Increment the count.
1578 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1579
1580 // The method data pointer needs to be updated to reflect the new target.
1581 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1582 bind(profile_continue);
1583 }
1584 }
1585
1586
1587 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1588 if (ProfileInterpreter) {
1589 Label profile_continue;
1590
1591 // If no method data exists, go to profile_continue.
1592 test_method_data_pointer(mdp, profile_continue);
1593
1594 // We are making a call. Increment the count.
1595 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1596
1597 // The method data pointer needs to be updated to reflect the new target.
1598 update_mdp_by_constant(mdp,
1599 in_bytes(VirtualCallData::
1600 virtual_call_data_size()));
1601 bind(profile_continue);
1602 }
1603 }
1604
1605
1606 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1607 Register mdp,
1608 Register reg2,
1609 bool receiver_can_be_null) {
1610 if (ProfileInterpreter) {
1611 Label profile_continue;
1612
1613 // If no method data exists, go to profile_continue.
1614 test_method_data_pointer(mdp, profile_continue);
1615
1616 Label skip_receiver_profile;
1617 if (receiver_can_be_null) {
1618 Label not_null;
1619 testptr(receiver, receiver);
1620 jccb(Assembler::notZero, not_null);
1621 // We are making a call. Increment the count for null receiver.
1622 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1623 jmp(skip_receiver_profile);
1624 bind(not_null);
1625 }
1626
1627 // Record the receiver type.
1628 record_klass_in_profile(receiver, mdp, reg2, true);
1629 bind(skip_receiver_profile);
1630
1631 // The method data pointer needs to be updated to reflect the new target.
1632 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1633 bind(profile_continue);
1634 }
1635 }
1636
1637 // This routine creates a state machine for updating the multi-row
1638 // type profile at a virtual call site (or other type-sensitive bytecode).
1639 // The machine visits each row (of receiver/count) until the receiver type
1640 // is found, or until it runs out of rows. At the same time, it remembers
1641 // the location of the first empty row. (An empty row records null for its
1642 // receiver, and can be allocated for a newly-observed receiver type.)
1643 // Because there are two degrees of freedom in the state, a simple linear
1644 // search will not work; it must be a decision tree. Hence this helper
1645 // function is recursive, to generate the required tree structured code.
1646 // It's the interpreter, so we are trading off code space for speed.
1647 // See below for example code.
1648 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1649 Register receiver, Register mdp,
1650 Register reg2, int start_row,
1651 Label& done, bool is_virtual_call) {
1652 if (TypeProfileWidth == 0) {
1653 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1654 } else {
1655 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1656 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset);
1657 }
1658 }
1659
1660 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, Register reg2, int start_row,
1661 Label& done, int total_rows,
1662 OffsetFunction item_offset_fn,
1663 OffsetFunction item_count_offset_fn) {
1664 int last_row = total_rows - 1;
1665 assert(start_row <= last_row, "must be work left to do");
1666 // Test this row for both the item and for null.
1667 // Take any of three different outcomes:
1668 // 1. found item => increment count and goto done
1669 // 2. found null => keep looking for case 1, maybe allocate this cell
1670 // 3. found something else => keep looking for cases 1 and 2
1671 // Case 3 is handled by a recursive call.
1672 for (int row = start_row; row <= last_row; row++) {
1673 Label next_test;
1674 bool test_for_null_also = (row == start_row);
1675
1676 // See if the item is item[n].
1677 int item_offset = in_bytes(item_offset_fn(row));
1678 test_mdp_data_at(mdp, item_offset, item,
1679 (test_for_null_also ? reg2 : noreg),
1680 next_test);
1681 // (Reg2 now contains the item from the CallData.)
1682
1683 // The item is item[n]. Increment count[n].
1684 int count_offset = in_bytes(item_count_offset_fn(row));
1685 increment_mdp_data_at(mdp, count_offset);
1686 jmp(done);
1687 bind(next_test);
1688
1689 if (test_for_null_also) {
1690 // Failed the equality check on item[n]... Test for null.
1691 testptr(reg2, reg2);
1692 if (start_row == last_row) {
1693 // The only thing left to do is handle the null case.
1694 Label found_null;
1695 jccb(Assembler::zero, found_null);
1696 // Item did not match any saved item and there is no empty row for it.
1697 // Increment total counter to indicate polymorphic case.
1698 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1699 jmp(done);
1700 bind(found_null);
1701 break;
1702 }
1703 Label found_null;
1704 // Since null is rare, make it be the branch-taken case.
1705 jcc(Assembler::zero, found_null);
1706
1707 // Put all the "Case 3" tests here.
1708 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1709 item_offset_fn, item_count_offset_fn);
1710
1711 // Found a null. Keep searching for a matching item,
1712 // but remember that this is an empty (unused) slot.
1713 bind(found_null);
1714 }
1715 }
1716
1717 // In the fall-through case, we found no matching item, but we
1718 // observed the item[start_row] is null.
1719
1720 // Fill in the item field and increment the count.
1721 int item_offset = in_bytes(item_offset_fn(start_row));
1722 set_mdp_data_at(mdp, item_offset, item);
1723 int count_offset = in_bytes(item_count_offset_fn(start_row));
1724 movl(reg2, DataLayout::counter_increment);
1725 set_mdp_data_at(mdp, count_offset, reg2);
1726 if (start_row > 0) {
1727 jmp(done);
1728 }
1729 }
1730
1731 // Example state machine code for three profile rows:
1732 // // main copy of decision tree, rooted at row[1]
1733 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1734 // if (row[0].rec != nullptr) {
1735 // // inner copy of decision tree, rooted at row[1]
1736 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1737 // if (row[1].rec != nullptr) {
1738 // // degenerate decision tree, rooted at row[2]
1739 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1740 // if (row[2].rec != nullptr) { count.incr(); goto done; } // overflow
1741 // row[2].init(rec); goto done;
1742 // } else {
1743 // // remember row[1] is empty
1744 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1745 // row[1].init(rec); goto done;
1746 // }
1747 // } else {
1748 // // remember row[0] is empty
1749 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1750 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1751 // row[0].init(rec); goto done;
1752 // }
1753 // done:
1754
1755 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1756 Register mdp, Register reg2,
1757 bool is_virtual_call) {
1758 assert(ProfileInterpreter, "must be profiling");
1759 Label done;
1760
1761 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1762
1763 bind (done);
1764 }
1765
1766 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1767 Register mdp) {
1768 if (ProfileInterpreter) {
1769 Label profile_continue;
1770 uint row;
1771
1772 // If no method data exists, go to profile_continue.
1773 test_method_data_pointer(mdp, profile_continue);
1774
1775 // Update the total ret count.
1776 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1777
1778 for (row = 0; row < RetData::row_limit(); row++) {
1779 Label next_test;
1780
1781 // See if return_bci is equal to bci[n]:
1782 test_mdp_data_at(mdp,
1783 in_bytes(RetData::bci_offset(row)),
1784 return_bci, noreg,
1785 next_test);
1786
1787 // return_bci is equal to bci[n]. Increment the count.
1788 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1789
1790 // The method data pointer needs to be updated to reflect the new target.
1791 update_mdp_by_offset(mdp,
1792 in_bytes(RetData::bci_displacement_offset(row)));
1793 jmp(profile_continue);
1794 bind(next_test);
1795 }
1796
1797 update_mdp_for_ret(return_bci);
1798
1799 bind(profile_continue);
1800 }
1801 }
1802
1803
1804 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1805 if (ProfileInterpreter) {
1806 Label profile_continue;
1807
1808 // If no method data exists, go to profile_continue.
1809 test_method_data_pointer(mdp, profile_continue);
1810
1811 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1812
1813 // The method data pointer needs to be updated.
1814 int mdp_delta = in_bytes(BitData::bit_data_size());
1815 if (TypeProfileCasts) {
1816 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1817 }
1818 update_mdp_by_constant(mdp, mdp_delta);
1819
1820 bind(profile_continue);
1821 }
1822 }
1823
1824
1825 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1826 if (ProfileInterpreter) {
1827 Label profile_continue;
1828
1829 // If no method data exists, go to profile_continue.
1830 test_method_data_pointer(mdp, profile_continue);
1831
1832 // The method data pointer needs to be updated.
1833 int mdp_delta = in_bytes(BitData::bit_data_size());
1834 if (TypeProfileCasts) {
1835 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1836
1837 // Record the object type.
1838 record_klass_in_profile(klass, mdp, reg2, false);
1839 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1840 NOT_LP64(restore_locals();) // Restore EDI
1841 }
1842 update_mdp_by_constant(mdp, mdp_delta);
1843
1844 bind(profile_continue);
1845 }
1846 }
1847
1848
1849 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1850 if (ProfileInterpreter) {
1851 Label profile_continue;
1852
1853 // If no method data exists, go to profile_continue.
1854 test_method_data_pointer(mdp, profile_continue);
1855
1856 // Update the default case count
1857 increment_mdp_data_at(mdp,
1858 in_bytes(MultiBranchData::default_count_offset()));
1859
1860 // The method data pointer needs to be updated.
1861 update_mdp_by_offset(mdp,
1862 in_bytes(MultiBranchData::
1863 default_displacement_offset()));
1864
1865 bind(profile_continue);
1866 }
1867 }
1868
1869
1870 void InterpreterMacroAssembler::profile_switch_case(Register index,
1871 Register mdp,
1872 Register reg2) {
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 // Build the base (index * per_case_size_in_bytes()) +
1880 // case_array_offset_in_bytes()
1881 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1882 imulptr(index, reg2); // XXX l ?
1883 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1884
1885 // Update the case count
1886 increment_mdp_data_at(mdp,
1887 index,
1888 in_bytes(MultiBranchData::relative_count_offset()));
1889
1890 // The method data pointer needs to be updated.
1891 update_mdp_by_offset(mdp,
1892 index,
1893 in_bytes(MultiBranchData::
1894 relative_displacement_offset()));
1895
1896 bind(profile_continue);
1897 }
1898 }
1899
1900
1901
1902 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1903 if (state == atos) {
1904 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
1905 }
1906 }
1907
1908 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1909 #ifndef _LP64
1910 if ((state == ftos && UseSSE < 1) ||
1911 (state == dtos && UseSSE < 2)) {
1912 MacroAssembler::verify_FPU(stack_depth);
1913 }
1914 #endif
1915 }
1916
1917 // Jump if ((*counter_addr += increment) & mask) == 0
1918 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
1919 Register scratch, Label* where) {
1920 // This update is actually not atomic and can lose a number of updates
1921 // under heavy contention, but the alternative of using the (contended)
1922 // atomic update here penalizes profiling paths too much.
1923 movl(scratch, counter_addr);
1924 incrementl(scratch, InvocationCounter::count_increment);
1925 movl(counter_addr, scratch);
1926 andl(scratch, mask);
1927 if (where != nullptr) {
1928 jcc(Assembler::zero, *where);
1929 }
1930 }
1931
1932 void InterpreterMacroAssembler::notify_method_entry() {
1933 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1934 // track stack depth. If it is possible to enter interp_only_mode we add
1935 // the code to check if the event should be sent.
1936 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1937 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1938 if (JvmtiExport::can_post_interpreter_events()) {
1939 Label L;
1940 NOT_LP64(get_thread(rthread);)
1941 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1942 testl(rdx, rdx);
1943 jcc(Assembler::zero, L);
1944 call_VM(noreg, CAST_FROM_FN_PTR(address,
1945 InterpreterRuntime::post_method_entry));
1946 bind(L);
1947 }
1948
1949 if (DTraceMethodProbes) {
1950 NOT_LP64(get_thread(rthread);)
1951 get_method(rarg);
1952 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1953 rthread, rarg);
1954 }
1955
1956 // RedefineClasses() tracing support for obsolete method entry
1957 if (log_is_enabled(Trace, redefine, class, obsolete)) {
1958 NOT_LP64(get_thread(rthread);)
1959 get_method(rarg);
1960 call_VM_leaf(
1961 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1962 rthread, rarg);
1963 }
1964 }
1965
1966
1967 void InterpreterMacroAssembler::notify_method_exit(
1968 TosState state, NotifyMethodExitMode mode) {
1969 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1970 // track stack depth. If it is possible to enter interp_only_mode we add
1971 // the code to check if the event should be sent.
1972 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1973 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1974 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1975 Label L;
1976 // Note: frame::interpreter_frame_result has a dependency on how the
1977 // method result is saved across the call to post_method_exit. If this
1978 // is changed then the interpreter_frame_result implementation will
1979 // need to be updated too.
1980
1981 // template interpreter will leave the result on the top of the stack.
1982 push(state);
1983 NOT_LP64(get_thread(rthread);)
1984 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1985 testl(rdx, rdx);
1986 jcc(Assembler::zero, L);
1987 call_VM(noreg,
1988 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1989 bind(L);
1990 pop(state);
1991 }
1992
1993 if (DTraceMethodProbes) {
1994 push(state);
1995 NOT_LP64(get_thread(rthread);)
1996 get_method(rarg);
1997 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1998 rthread, rarg);
1999 pop(state);
2000 }
2001 }
2002
2003 void InterpreterMacroAssembler::load_resolved_indy_entry(Register cache, Register index) {
2004 // Get index out of bytecode pointer
2005 get_cache_index_at_bcp(index, 1, sizeof(u4));
2006 // Get address of invokedynamic array
2007 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
2008 movptr(cache, Address(cache, in_bytes(ConstantPoolCache::invokedynamic_entries_offset())));
2009 if (is_power_of_2(sizeof(ResolvedIndyEntry))) {
2010 shll(index, log2i_exact(sizeof(ResolvedIndyEntry))); // Scale index by power of 2
2011 } else {
2012 imull(index, index, sizeof(ResolvedIndyEntry)); // Scale the index to be the entry index * sizeof(ResolvedIndyEntry)
2013 }
2014 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedIndyEntry>::base_offset_in_bytes()));
2015 }
2016
2017 void InterpreterMacroAssembler::load_field_entry(Register cache, Register index, int bcp_offset) {
2018 // Get index out of bytecode pointer
2019 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
2020 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
2021
2022 movptr(cache, Address(cache, ConstantPoolCache::field_entries_offset()));
2023 // Take shortcut if the size is a power of 2
2024 if (is_power_of_2(sizeof(ResolvedFieldEntry))) {
2025 shll(index, log2i_exact(sizeof(ResolvedFieldEntry))); // Scale index by power of 2
2026 } else {
2027 imull(index, index, sizeof(ResolvedFieldEntry)); // Scale the index to be the entry index * sizeof(ResolvedFieldEntry)
2028 }
2029 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedFieldEntry>::base_offset_in_bytes()));
2030 }
2031
2032 void InterpreterMacroAssembler::load_method_entry(Register cache, Register index, int bcp_offset) {
2033 // Get index out of bytecode pointer
2034 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
2035 get_cache_index_at_bcp(index, bcp_offset, sizeof(u2));
2036
2037 movptr(cache, Address(cache, ConstantPoolCache::method_entries_offset()));
2038 imull(index, index, sizeof(ResolvedMethodEntry)); // Scale the index to be the entry index * sizeof(ResolvedMethodEntry)
2039 lea(cache, Address(cache, index, Address::times_1, Array<ResolvedMethodEntry>::base_offset_in_bytes()));
2040 }