1 /*
2 * Copyright (c) 1997, 2018, 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 "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markWord.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "oops/valueKlass.hpp"
35 #include "prims/jvmtiExport.hpp"
36 #include "prims/jvmtiThreadState.hpp"
37 #include "runtime/basicLock.hpp"
38 #include "runtime/biasedLocking.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/safepointMechanism.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/thread.inline.hpp"
43
44 // Implementation of InterpreterMacroAssembler
45
46 void InterpreterMacroAssembler::jump_to_entry(address entry) {
47 assert(entry, "Entry must have been generated by now");
48 jump(RuntimeAddress(entry));
49 }
50
51 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
52 Label update, next, none;
53
54 verify_oop(obj);
55
56 testptr(obj, obj);
57 jccb(Assembler::notZero, update);
58 orptr(mdo_addr, TypeEntries::null_seen);
59 jmpb(next);
60
61 bind(update);
62 load_klass(obj, obj);
63
64 xorptr(obj, mdo_addr);
65 testptr(obj, TypeEntries::type_klass_mask);
66 jccb(Assembler::zero, next); // klass seen before, nothing to
67 // do. The unknown bit may have been
68 // set already but no need to check.
69
70 testptr(obj, TypeEntries::type_unknown);
71 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
72
73 cmpptr(mdo_addr, 0);
74 jccb(Assembler::equal, none);
75 cmpptr(mdo_addr, TypeEntries::null_seen);
76 jccb(Assembler::equal, none);
77 // There is a chance that the checks above (re-reading profiling
78 // data from memory) fail if another thread has just set the
79 // profiling to this obj's klass
80 xorptr(obj, mdo_addr);
81 testptr(obj, TypeEntries::type_klass_mask);
82 jccb(Assembler::zero, next);
83
84 // different than before. Cannot keep accurate profile.
85 orptr(mdo_addr, TypeEntries::type_unknown);
86 jmpb(next);
87
88 bind(none);
89 // first time here. Set profile type.
90 movptr(mdo_addr, obj);
91
92 bind(next);
93 }
94
95 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
96 if (!ProfileInterpreter) {
97 return;
98 }
99
100 if (MethodData::profile_arguments() || MethodData::profile_return()) {
101 Label profile_continue;
102
103 test_method_data_pointer(mdp, profile_continue);
104
105 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
106
107 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
108 jcc(Assembler::notEqual, profile_continue);
109
110 if (MethodData::profile_arguments()) {
111 Label done;
112 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
113 addptr(mdp, off_to_args);
114
115 for (int i = 0; i < TypeProfileArgsLimit; i++) {
116 if (i > 0 || MethodData::profile_return()) {
117 // If return value type is profiled we may have no argument to profile
118 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
119 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
120 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
121 jcc(Assembler::less, done);
122 }
123 movptr(tmp, Address(callee, Method::const_offset()));
124 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
125 // stack offset o (zero based) from the start of the argument
126 // list, for n arguments translates into offset n - o - 1 from
127 // the end of the argument list
128 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
129 subl(tmp, 1);
130 Address arg_addr = argument_address(tmp);
131 movptr(tmp, arg_addr);
132
133 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
134 profile_obj_type(tmp, mdo_arg_addr);
135
136 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
137 addptr(mdp, to_add);
138 off_to_args += to_add;
139 }
140
141 if (MethodData::profile_return()) {
142 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
143 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
144 }
145
146 bind(done);
147
148 if (MethodData::profile_return()) {
149 // We're right after the type profile for the last
150 // argument. tmp is the number of cells left in the
151 // CallTypeData/VirtualCallTypeData to reach its end. Non null
152 // if there's a return to profile.
153 assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
154 shll(tmp, exact_log2(DataLayout::cell_size));
155 addptr(mdp, tmp);
156 }
157 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
158 } else {
159 assert(MethodData::profile_return(), "either profile call args or call ret");
160 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
161 }
162
163 // mdp points right after the end of the
164 // CallTypeData/VirtualCallTypeData, right after the cells for the
165 // return value type if there's one
166
167 bind(profile_continue);
168 }
169 }
170
171 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
172 assert_different_registers(mdp, ret, tmp, _bcp_register);
173 if (ProfileInterpreter && MethodData::profile_return()) {
174 Label profile_continue;
175
176 test_method_data_pointer(mdp, profile_continue);
177
178 if (MethodData::profile_return_jsr292_only()) {
179 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
180
181 // If we don't profile all invoke bytecodes we must make sure
182 // it's a bytecode we indeed profile. We can't go back to the
183 // begining of the ProfileData we intend to update to check its
184 // type because we're right after it and we don't known its
185 // length
186 Label do_profile;
187 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
188 jcc(Assembler::equal, do_profile);
189 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
190 jcc(Assembler::equal, do_profile);
191 get_method(tmp);
192 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
193 jcc(Assembler::notEqual, profile_continue);
194
195 bind(do_profile);
196 }
197
198 Address mdo_ret_addr(mdp, -in_bytes(SingleTypeEntry::size()));
199 mov(tmp, ret);
200 profile_obj_type(tmp, mdo_ret_addr);
201
202 bind(profile_continue);
203 }
204 }
205
206 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
207 if (ProfileInterpreter && MethodData::profile_parameters()) {
208 Label profile_continue;
209
210 test_method_data_pointer(mdp, profile_continue);
211
212 // Load the offset of the area within the MDO used for
213 // parameters. If it's negative we're not profiling any parameters
214 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
215 testl(tmp1, tmp1);
216 jcc(Assembler::negative, profile_continue);
217
218 // Compute a pointer to the area for parameters from the offset
219 // and move the pointer to the slot for the last
220 // parameters. Collect profiling from last parameter down.
221 // mdo start + parameters offset + array length - 1
222 addptr(mdp, tmp1);
223 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
224 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
225
226 Label loop;
227 bind(loop);
228
229 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
230 int type_base = in_bytes(ParametersTypeData::type_offset(0));
231 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
232 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
233 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
234
235 // load offset on the stack from the slot for this parameter
236 movptr(tmp2, arg_off);
237 negptr(tmp2);
238 // read the parameter from the local area
239 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
240
241 // profile the parameter
242 profile_obj_type(tmp2, arg_type);
243
244 // go to next parameter
245 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
246 jcc(Assembler::positive, loop);
247
248 bind(profile_continue);
249 }
250 }
251
252 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
253 int number_of_arguments) {
254 // interpreter specific
255 //
256 // Note: No need to save/restore bcp & locals registers
257 // since these are callee saved registers and no blocking/
258 // GC can happen in leaf calls.
259 // Further Note: DO NOT save/restore bcp/locals. If a caller has
260 // already saved them so that it can use rsi/rdi as temporaries
261 // then a save/restore here will DESTROY the copy the caller
262 // saved! There used to be a save_bcp() that only happened in
263 // the ASSERT path (no restore_bcp). Which caused bizarre failures
264 // when jvm built with ASSERTs.
265 #ifdef ASSERT
266 {
267 Label L;
268 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
269 jcc(Assembler::equal, L);
270 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
271 " last_sp != NULL");
272 bind(L);
273 }
274 #endif
275 // super call
276 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
277 // interpreter specific
278 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
279 // but since they may not have been saved (and we don't want to
280 // save them here (see note above) the assert is invalid.
281 }
282
283 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
284 Register java_thread,
285 Register last_java_sp,
286 address entry_point,
287 int number_of_arguments,
288 bool check_exceptions) {
289 // interpreter specific
290 //
291 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
292 // really make a difference for these runtime calls, since they are
293 // slow anyway. Btw., bcp must be saved/restored since it may change
294 // due to GC.
295 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
296 save_bcp();
297 #ifdef ASSERT
298 {
299 Label L;
300 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
301 jcc(Assembler::equal, L);
302 stop("InterpreterMacroAssembler::call_VM_base:"
303 " last_sp != NULL");
304 bind(L);
305 }
306 #endif /* ASSERT */
307 // super call
308 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
309 entry_point, number_of_arguments,
310 check_exceptions);
311 // interpreter specific
312 restore_bcp();
313 restore_locals();
314 }
315
316 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
317 if (JvmtiExport::can_pop_frame()) {
318 Label L;
319 // Initiate popframe handling only if it is not already being
320 // processed. If the flag has the popframe_processing bit set, it
321 // means that this code is called *during* popframe handling - we
322 // don't want to reenter.
323 // This method is only called just after the call into the vm in
324 // call_VM_base, so the arg registers are available.
325 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
326 LP64_ONLY(c_rarg0);
327 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
328 testl(pop_cond, JavaThread::popframe_pending_bit);
329 jcc(Assembler::zero, L);
330 testl(pop_cond, JavaThread::popframe_processing_bit);
331 jcc(Assembler::notZero, L);
332 // Call Interpreter::remove_activation_preserving_args_entry() to get the
333 // address of the same-named entrypoint in the generated interpreter code.
334 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
335 jmp(rax);
336 bind(L);
337 NOT_LP64(get_thread(java_thread);)
338 }
339 }
340
341 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
342 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
343 NOT_LP64(get_thread(thread);)
344 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
345 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
346 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
347 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
348 #ifdef _LP64
349 switch (state) {
350 case atos: movptr(rax, oop_addr);
351 movptr(oop_addr, (int32_t)NULL_WORD);
352 verify_oop(rax, state); break;
353 case ltos: movptr(rax, val_addr); break;
354 case btos: // fall through
355 case ztos: // fall through
356 case ctos: // fall through
357 case stos: // fall through
358 case itos: movl(rax, val_addr); break;
359 case ftos: load_float(val_addr); break;
360 case dtos: load_double(val_addr); break;
361 case vtos: /* nothing to do */ break;
362 default : ShouldNotReachHere();
363 }
364 // Clean up tos value in the thread object
365 movl(tos_addr, (int) ilgl);
366 movl(val_addr, (int32_t) NULL_WORD);
367 #else
368 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
369 + in_ByteSize(wordSize));
370 switch (state) {
371 case atos: movptr(rax, oop_addr);
372 movptr(oop_addr, NULL_WORD);
373 verify_oop(rax, state); break;
374 case ltos:
375 movl(rdx, val_addr1); // fall through
376 case btos: // fall through
377 case ztos: // fall through
378 case ctos: // fall through
379 case stos: // fall through
380 case itos: movl(rax, val_addr); break;
381 case ftos: load_float(val_addr); break;
382 case dtos: load_double(val_addr); break;
383 case vtos: /* nothing to do */ break;
384 default : ShouldNotReachHere();
385 }
386 #endif // _LP64
387 // Clean up tos value in the thread object
388 movl(tos_addr, (int32_t) ilgl);
389 movptr(val_addr, NULL_WORD);
390 NOT_LP64(movptr(val_addr1, NULL_WORD);)
391 }
392
393
394 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
395 if (JvmtiExport::can_force_early_return()) {
396 Label L;
397 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
398 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
399
400 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
401 testptr(tmp, tmp);
402 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
403
404 // Initiate earlyret handling only if it is not already being processed.
405 // If the flag has the earlyret_processing bit set, it means that this code
406 // is called *during* earlyret handling - we don't want to reenter.
407 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
408 cmpl(tmp, JvmtiThreadState::earlyret_pending);
409 jcc(Assembler::notEqual, L);
410
411 // Call Interpreter::remove_activation_early_entry() to get the address of the
412 // same-named entrypoint in the generated interpreter code.
413 NOT_LP64(get_thread(java_thread);)
414 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
415 #ifdef _LP64
416 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
417 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
418 #else
419 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
420 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
421 #endif // _LP64
422 jmp(rax);
423 bind(L);
424 NOT_LP64(get_thread(java_thread);)
425 }
426 }
427
428 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
429 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
430 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
431 bswapl(reg);
432 shrl(reg, 16);
433 }
434
435 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
436 int bcp_offset,
437 size_t index_size) {
438 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
439 if (index_size == sizeof(u2)) {
440 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
441 } else if (index_size == sizeof(u4)) {
442 movl(index, Address(_bcp_register, bcp_offset));
443 // Check if the secondary index definition is still ~x, otherwise
444 // we have to change the following assembler code to calculate the
445 // plain index.
446 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
447 notl(index); // convert to plain index
448 } else if (index_size == sizeof(u1)) {
449 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
450 } else {
451 ShouldNotReachHere();
452 }
453 }
454
455 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
456 Register index,
457 int bcp_offset,
458 size_t index_size) {
459 assert_different_registers(cache, index);
460 get_cache_index_at_bcp(index, bcp_offset, index_size);
461 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
462 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
463 // convert from field index to ConstantPoolCacheEntry index
464 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
465 shll(index, 2);
466 }
467
468 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
469 Register index,
470 Register bytecode,
471 int byte_no,
472 int bcp_offset,
473 size_t index_size) {
474 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
475 // We use a 32-bit load here since the layout of 64-bit words on
476 // little-endian machines allow us that.
477 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
478 const int shift_count = (1 + byte_no) * BitsPerByte;
479 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
480 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
481 "correct shift count");
482 shrl(bytecode, shift_count);
483 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
484 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
485 }
486
487 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
488 Register tmp,
489 int bcp_offset,
490 size_t index_size) {
491 assert_different_registers(cache, tmp);
492
493 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
494 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
495 // convert from field index to ConstantPoolCacheEntry index
496 // and from word offset to byte offset
497 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
498 shll(tmp, 2 + LogBytesPerWord);
499 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
500 // skip past the header
501 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
502 addptr(cache, tmp); // construct pointer to cache entry
503 }
504
505 // Load object from cpool->resolved_references(index)
506 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result,
507 Register index,
508 Register tmp) {
509 assert_different_registers(result, index);
510
511 get_constant_pool(result);
512 // load pointer for resolved_references[] objArray
513 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
514 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
515 resolve_oop_handle(result, tmp);
516 load_heap_oop(result, Address(result, index,
517 UseCompressedOops ? Address::times_4 : Address::times_ptr,
518 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
519 }
520
521 // load cpool->resolved_klass_at(index)
522 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass,
523 Register cpool,
524 Register index) {
525 assert_different_registers(cpool, index);
526
527 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
528 Register resolved_klasses = cpool;
529 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
530 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
531 }
532
533 void InterpreterMacroAssembler::load_resolved_method_at_index(int byte_no,
534 Register method,
535 Register cache,
536 Register index) {
537 assert_different_registers(cache, index);
538
539 const int method_offset = in_bytes(
540 ConstantPoolCache::base_offset() +
541 ((byte_no == TemplateTable::f2_byte)
542 ? ConstantPoolCacheEntry::f2_offset()
543 : ConstantPoolCacheEntry::f1_offset()));
544
545 movptr(method, Address(cache, index, Address::times_ptr, method_offset)); // get f1 Method*
546 }
547
548 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
549 // subtype of super_klass.
550 //
551 // Args:
552 // rax: superklass
553 // Rsub_klass: subklass
554 //
555 // Kills:
556 // rcx, rdi
557 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
558 Label& ok_is_subtype,
559 bool profile) {
560 assert(Rsub_klass != rax, "rax holds superklass");
561 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
562 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
563 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
564 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
565
566 // Profile the not-null value's klass.
567 if (profile) {
568 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
569 }
570
571 // Do the check.
572 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
573
574 // Profile the failure of the check.
575 if (profile) {
576 profile_typecheck_failed(rcx); // blows rcx
577 }
578 }
579
580
581 #ifndef _LP64
582 void InterpreterMacroAssembler::f2ieee() {
583 if (IEEEPrecision) {
584 fstp_s(Address(rsp, 0));
585 fld_s(Address(rsp, 0));
586 }
587 }
588
589
590 void InterpreterMacroAssembler::d2ieee() {
591 if (IEEEPrecision) {
592 fstp_d(Address(rsp, 0));
593 fld_d(Address(rsp, 0));
594 }
595 }
596 #endif // _LP64
597
598 // Java Expression Stack
599
600 void InterpreterMacroAssembler::pop_ptr(Register r) {
601 pop(r);
602 }
603
604 void InterpreterMacroAssembler::push_ptr(Register r) {
605 push(r);
606 }
607
608 void InterpreterMacroAssembler::push_i(Register r) {
609 push(r);
610 }
611
612 void InterpreterMacroAssembler::push_f(XMMRegister r) {
613 subptr(rsp, wordSize);
614 movflt(Address(rsp, 0), r);
615 }
616
617 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
618 movflt(r, Address(rsp, 0));
619 addptr(rsp, wordSize);
620 }
621
622 void InterpreterMacroAssembler::push_d(XMMRegister r) {
623 subptr(rsp, 2 * wordSize);
624 movdbl(Address(rsp, 0), r);
625 }
626
627 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
628 movdbl(r, Address(rsp, 0));
629 addptr(rsp, 2 * Interpreter::stackElementSize);
630 }
631
632 #ifdef _LP64
633 void InterpreterMacroAssembler::pop_i(Register r) {
634 // XXX can't use pop currently, upper half non clean
635 movl(r, Address(rsp, 0));
636 addptr(rsp, wordSize);
637 }
638
639 void InterpreterMacroAssembler::pop_l(Register r) {
640 movq(r, Address(rsp, 0));
641 addptr(rsp, 2 * Interpreter::stackElementSize);
642 }
643
644 void InterpreterMacroAssembler::push_l(Register r) {
645 subptr(rsp, 2 * wordSize);
646 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
647 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
648 }
649
650 void InterpreterMacroAssembler::pop(TosState state) {
651 switch (state) {
652 case atos: pop_ptr(); break;
653 case btos:
654 case ztos:
655 case ctos:
656 case stos:
657 case itos: pop_i(); break;
658 case ltos: pop_l(); break;
659 case ftos: pop_f(xmm0); break;
660 case dtos: pop_d(xmm0); break;
661 case vtos: /* nothing to do */ break;
662 default: ShouldNotReachHere();
663 }
664 verify_oop(rax, state);
665 }
666
667 void InterpreterMacroAssembler::push(TosState state) {
668 verify_oop(rax, state);
669 switch (state) {
670 case atos: push_ptr(); break;
671 case btos:
672 case ztos:
673 case ctos:
674 case stos:
675 case itos: push_i(); break;
676 case ltos: push_l(); break;
677 case ftos: push_f(xmm0); break;
678 case dtos: push_d(xmm0); break;
679 case vtos: /* nothing to do */ break;
680 default : ShouldNotReachHere();
681 }
682 }
683 #else
684 void InterpreterMacroAssembler::pop_i(Register r) {
685 pop(r);
686 }
687
688 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
689 pop(lo);
690 pop(hi);
691 }
692
693 void InterpreterMacroAssembler::pop_f() {
694 fld_s(Address(rsp, 0));
695 addptr(rsp, 1 * wordSize);
696 }
697
698 void InterpreterMacroAssembler::pop_d() {
699 fld_d(Address(rsp, 0));
700 addptr(rsp, 2 * wordSize);
701 }
702
703
704 void InterpreterMacroAssembler::pop(TosState state) {
705 switch (state) {
706 case atos: pop_ptr(rax); break;
707 case btos: // fall through
708 case ztos: // fall through
709 case ctos: // fall through
710 case stos: // fall through
711 case itos: pop_i(rax); break;
712 case ltos: pop_l(rax, rdx); break;
713 case ftos:
714 if (UseSSE >= 1) {
715 pop_f(xmm0);
716 } else {
717 pop_f();
718 }
719 break;
720 case dtos:
721 if (UseSSE >= 2) {
722 pop_d(xmm0);
723 } else {
724 pop_d();
725 }
726 break;
727 case vtos: /* nothing to do */ break;
728 default : ShouldNotReachHere();
729 }
730 verify_oop(rax, state);
731 }
732
733
734 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
735 push(hi);
736 push(lo);
737 }
738
739 void InterpreterMacroAssembler::push_f() {
740 // Do not schedule for no AGI! Never write beyond rsp!
741 subptr(rsp, 1 * wordSize);
742 fstp_s(Address(rsp, 0));
743 }
744
745 void InterpreterMacroAssembler::push_d() {
746 // Do not schedule for no AGI! Never write beyond rsp!
747 subptr(rsp, 2 * wordSize);
748 fstp_d(Address(rsp, 0));
749 }
750
751
752 void InterpreterMacroAssembler::push(TosState state) {
753 verify_oop(rax, state);
754 switch (state) {
755 case atos: push_ptr(rax); break;
756 case btos: // fall through
757 case ztos: // fall through
758 case ctos: // fall through
759 case stos: // fall through
760 case itos: push_i(rax); break;
761 case ltos: push_l(rax, rdx); break;
762 case ftos:
763 if (UseSSE >= 1) {
764 push_f(xmm0);
765 } else {
766 push_f();
767 }
768 break;
769 case dtos:
770 if (UseSSE >= 2) {
771 push_d(xmm0);
772 } else {
773 push_d();
774 }
775 break;
776 case vtos: /* nothing to do */ break;
777 default : ShouldNotReachHere();
778 }
779 }
780 #endif // _LP64
781
782
783 // Helpers for swap and dup
784 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
785 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
786 }
787
788 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
789 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
790 }
791
792
793 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
794 // set sender sp
795 lea(_bcp_register, Address(rsp, wordSize));
796 // record last_sp
797 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
798 }
799
800
801 // Jump to from_interpreted entry of a call unless single stepping is possible
802 // in this thread in which case we must call the i2i entry
803 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
804 prepare_to_jump_from_interpreted();
805
806 if (JvmtiExport::can_post_interpreter_events()) {
807 Label run_compiled_code;
808 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
809 // compiled code in threads for which the event is enabled. Check here for
810 // interp_only_mode if these events CAN be enabled.
811 // interp_only is an int, on little endian it is sufficient to test the byte only
812 // Is a cmpl faster?
813 LP64_ONLY(temp = r15_thread;)
814 NOT_LP64(get_thread(temp);)
815 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
816 jccb(Assembler::zero, run_compiled_code);
817 jmp(Address(method, Method::interpreter_entry_offset()));
818 bind(run_compiled_code);
819 }
820
821 jmp(Address(method, Method::from_interpreted_offset()));
822 }
823
824 // The following two routines provide a hook so that an implementation
825 // can schedule the dispatch in two parts. x86 does not do this.
826 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
827 // Nothing x86 specific to be done here
828 }
829
830 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
831 dispatch_next(state, step);
832 }
833
834 void InterpreterMacroAssembler::dispatch_base(TosState state,
835 address* table,
836 bool verifyoop,
837 bool generate_poll) {
838 verify_FPU(1, state);
839 if (VerifyActivationFrameSize) {
840 Label L;
841 mov(rcx, rbp);
842 subptr(rcx, rsp);
843 int32_t min_frame_size =
844 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
845 wordSize;
846 cmpptr(rcx, (int32_t)min_frame_size);
847 jcc(Assembler::greaterEqual, L);
848 stop("broken stack frame");
849 bind(L);
850 }
851 if (verifyoop) {
852 verify_oop(rax, state);
853 }
854
855 address* const safepoint_table = Interpreter::safept_table(state);
856 #ifdef _LP64
857 Label no_safepoint, dispatch;
858 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
859 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
860 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
861
862 jccb(Assembler::zero, no_safepoint);
863 lea(rscratch1, ExternalAddress((address)safepoint_table));
864 jmpb(dispatch);
865 }
866
867 bind(no_safepoint);
868 lea(rscratch1, ExternalAddress((address)table));
869 bind(dispatch);
870 jmp(Address(rscratch1, rbx, Address::times_8));
871
872 #else
873 Address index(noreg, rbx, Address::times_ptr);
874 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
875 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
876 Label no_safepoint;
877 const Register thread = rcx;
878 get_thread(thread);
879 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
880
881 jccb(Assembler::zero, no_safepoint);
882 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
883 jump(dispatch_addr);
884 bind(no_safepoint);
885 }
886
887 {
888 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
889 jump(dispatch_addr);
890 }
891 #endif // _LP64
892 }
893
894 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
895 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
896 }
897
898 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
899 dispatch_base(state, Interpreter::normal_table(state));
900 }
901
902 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
903 dispatch_base(state, Interpreter::normal_table(state), false);
904 }
905
906
907 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
908 // load next bytecode (load before advancing _bcp_register to prevent AGI)
909 load_unsigned_byte(rbx, Address(_bcp_register, step));
910 // advance _bcp_register
911 increment(_bcp_register, step);
912 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
913 }
914
915 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
916 // load current bytecode
917 load_unsigned_byte(rbx, Address(_bcp_register, 0));
918 dispatch_base(state, table);
919 }
920
921 void InterpreterMacroAssembler::narrow(Register result) {
922
923 // Get method->_constMethod->_result_type
924 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
925 movptr(rcx, Address(rcx, Method::const_offset()));
926 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
927
928 Label done, notBool, notByte, notChar;
929
930 // common case first
931 cmpl(rcx, T_INT);
932 jcc(Assembler::equal, done);
933
934 // mask integer result to narrower return type.
935 cmpl(rcx, T_BOOLEAN);
936 jcc(Assembler::notEqual, notBool);
937 andl(result, 0x1);
938 jmp(done);
939
940 bind(notBool);
941 cmpl(rcx, T_BYTE);
942 jcc(Assembler::notEqual, notByte);
943 LP64_ONLY(movsbl(result, result);)
944 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
945 NOT_LP64(sarl(result, 24);) // and sign-extend byte
946 jmp(done);
947
948 bind(notByte);
949 cmpl(rcx, T_CHAR);
950 jcc(Assembler::notEqual, notChar);
951 LP64_ONLY(movzwl(result, result);)
952 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
953 jmp(done);
954
955 bind(notChar);
956 // cmpl(rcx, T_SHORT); // all that's left
957 // jcc(Assembler::notEqual, done);
958 LP64_ONLY(movswl(result, result);)
959 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
960 NOT_LP64(sarl(result, 16);) // and sign-extend short
961
962 // Nothing to do for T_INT
963 bind(done);
964 }
965
966 // remove activation
967 //
968 // Unlock the receiver if this is a synchronized method.
969 // Unlock any Java monitors from syncronized blocks.
970 // Remove the activation from the stack.
971 //
972 // If there are locked Java monitors
973 // If throw_monitor_exception
974 // throws IllegalMonitorStateException
975 // Else if install_monitor_exception
976 // installs IllegalMonitorStateException
977 // Else
978 // no error processing
979 void InterpreterMacroAssembler::remove_activation(
980 TosState state,
981 Register ret_addr,
982 bool throw_monitor_exception,
983 bool install_monitor_exception,
984 bool notify_jvmdi) {
985 // Note: Registers rdx xmm0 may be in use for the
986 // result check if synchronized method
987 Label unlocked, unlock, no_unlock;
988
989 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
990 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
991 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
992 // monitor pointers need different register
993 // because rdx may have the result in it
994 NOT_LP64(get_thread(rcx);)
995
996 // get the value of _do_not_unlock_if_synchronized into rdx
997 const Address do_not_unlock_if_synchronized(rthread,
998 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
999 movbool(rbx, do_not_unlock_if_synchronized);
1000 movbool(do_not_unlock_if_synchronized, false); // reset the flag
1001
1002 // get method access flags
1003 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1004 movl(rcx, Address(rcx, Method::access_flags_offset()));
1005 testl(rcx, JVM_ACC_SYNCHRONIZED);
1006 jcc(Assembler::zero, unlocked);
1007
1008 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
1009 // is set.
1010 testbool(rbx);
1011 jcc(Assembler::notZero, no_unlock);
1012
1013 // unlock monitor
1014 push(state); // save result
1015
1016 // BasicObjectLock will be first in list, since this is a
1017 // synchronized method. However, need to check that the object has
1018 // not been unlocked by an explicit monitorexit bytecode.
1019 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
1020 wordSize - (int) sizeof(BasicObjectLock));
1021 // We use c_rarg1/rdx so that if we go slow path it will be the correct
1022 // register for unlock_object to pass to VM directly
1023 lea(robj, monitor); // address of first monitor
1024
1025 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1026 testptr(rax, rax);
1027 jcc(Assembler::notZero, unlock);
1028
1029 pop(state);
1030 if (throw_monitor_exception) {
1031 // Entry already unlocked, need to throw exception
1032 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1033 call_VM(noreg, CAST_FROM_FN_PTR(address,
1034 InterpreterRuntime::throw_illegal_monitor_state_exception));
1035 should_not_reach_here();
1036 } else {
1037 // Monitor already unlocked during a stack unroll. If requested,
1038 // install an illegal_monitor_state_exception. Continue with
1039 // stack unrolling.
1040 if (install_monitor_exception) {
1041 NOT_LP64(empty_FPU_stack();)
1042 call_VM(noreg, CAST_FROM_FN_PTR(address,
1043 InterpreterRuntime::new_illegal_monitor_state_exception));
1044 }
1045 jmp(unlocked);
1046 }
1047
1048 bind(unlock);
1049 unlock_object(robj);
1050 pop(state);
1051
1052 // Check that for block-structured locking (i.e., that all locked
1053 // objects has been unlocked)
1054 bind(unlocked);
1055
1056 // rax, rdx: Might contain return value
1057
1058 // Check that all monitors are unlocked
1059 {
1060 Label loop, exception, entry, restart;
1061 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1062 const Address monitor_block_top(
1063 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1064 const Address monitor_block_bot(
1065 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1066
1067 bind(restart);
1068 // We use c_rarg1 so that if we go slow path it will be the correct
1069 // register for unlock_object to pass to VM directly
1070 movptr(rmon, monitor_block_top); // points to current entry, starting
1071 // with top-most entry
1072 lea(rbx, monitor_block_bot); // points to word before bottom of
1073 // monitor block
1074 jmp(entry);
1075
1076 // Entry already locked, need to throw exception
1077 bind(exception);
1078
1079 if (throw_monitor_exception) {
1080 // Throw exception
1081 NOT_LP64(empty_FPU_stack();)
1082 MacroAssembler::call_VM(noreg,
1083 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1084 throw_illegal_monitor_state_exception));
1085 should_not_reach_here();
1086 } else {
1087 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1088 // Unlock does not block, so don't have to worry about the frame.
1089 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1090
1091 push(state);
1092 mov(robj, rmon); // nop if robj and rmon are the same
1093 unlock_object(robj);
1094 pop(state);
1095
1096 if (install_monitor_exception) {
1097 NOT_LP64(empty_FPU_stack();)
1098 call_VM(noreg, CAST_FROM_FN_PTR(address,
1099 InterpreterRuntime::
1100 new_illegal_monitor_state_exception));
1101 }
1102
1103 jmp(restart);
1104 }
1105
1106 bind(loop);
1107 // check if current entry is used
1108 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
1109 jcc(Assembler::notEqual, exception);
1110
1111 addptr(rmon, entry_size); // otherwise advance to next entry
1112 bind(entry);
1113 cmpptr(rmon, rbx); // check if bottom reached
1114 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1115 }
1116
1117 bind(no_unlock);
1118
1119 // jvmti support
1120 if (notify_jvmdi) {
1121 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1122 } else {
1123 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1124 }
1125
1126 if (StackReservedPages > 0) {
1127 movptr(rbx,
1128 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1129 // testing if reserved zone needs to be re-enabled
1130 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1131 Label no_reserved_zone_enabling;
1132
1133 NOT_LP64(get_thread(rthread);)
1134
1135 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1136 jcc(Assembler::equal, no_reserved_zone_enabling);
1137
1138 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1139 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1140
1141 call_VM_leaf(
1142 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1143 call_VM(noreg, CAST_FROM_FN_PTR(address,
1144 InterpreterRuntime::throw_delayed_StackOverflowError));
1145 should_not_reach_here();
1146
1147 bind(no_reserved_zone_enabling);
1148 }
1149
1150 // remove activation
1151 // get sender sp
1152 movptr(rbx,
1153 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1154
1155 if (state == atos && ValueTypeReturnedAsFields) {
1156 Label skip;
1157 // Test if the return type is a value type
1158 movptr(rdi, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1159 movptr(rdi, Address(rdi, Method::const_offset()));
1160 load_unsigned_byte(rdi, Address(rdi, ConstMethod::result_type_offset()));
1161 cmpl(rdi, T_VALUETYPE);
1162 jcc(Assembler::notEqual, skip);
1163
1164 // We are returning a value type, load its fields into registers
1165 #ifndef _LP64
1166 super_call_VM_leaf(StubRoutines::load_value_type_fields_in_regs());
1167 #else
1168 // Load fields from a buffered value with a value class specific handler
1169 load_klass(rdi, rax);
1170 movptr(rdi, Address(rdi, InstanceKlass::adr_valueklass_fixed_block_offset()));
1171 movptr(rdi, Address(rdi, ValueKlass::unpack_handler_offset()));
1172
1173 testptr(rdi, rdi);
1174 jcc(Assembler::equal, skip);
1175
1176 call(rdi);
1177 #endif
1178 // call above kills the value in rbx. Reload it.
1179 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1180 bind(skip);
1181 }
1182 leave(); // remove frame anchor
1183 pop(ret_addr); // get return address
1184 mov(rsp, rbx); // set sp to sender sp
1185 }
1186
1187 void InterpreterMacroAssembler::get_method_counters(Register method,
1188 Register mcs, Label& skip) {
1189 Label has_counters;
1190 movptr(mcs, Address(method, Method::method_counters_offset()));
1191 testptr(mcs, mcs);
1192 jcc(Assembler::notZero, has_counters);
1193 call_VM(noreg, CAST_FROM_FN_PTR(address,
1194 InterpreterRuntime::build_method_counters), method);
1195 movptr(mcs, Address(method,Method::method_counters_offset()));
1196 testptr(mcs, mcs);
1197 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1198 bind(has_counters);
1199 }
1200
1201 void InterpreterMacroAssembler::allocate_instance(Register klass, Register new_obj,
1202 Register t1, Register t2,
1203 bool clear_fields, Label& alloc_failed) {
1204 MacroAssembler::allocate_instance(klass, new_obj, t1, t2, clear_fields, alloc_failed);
1205 {
1206 SkipIfEqual skip_if(this, &DTraceAllocProbes, 0);
1207 // Trigger dtrace event for fastpath
1208 push(atos);
1209 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), new_obj);
1210 pop(atos);
1211 }
1212 }
1213
1214
1215 void InterpreterMacroAssembler::read_flattened_field(Register holder_klass,
1216 Register field_index, Register field_offset,
1217 Register obj) {
1218 Label alloc_failed, empty_value, done;
1219 const Register src = field_offset;
1220 const Register alloc_temp = LP64_ONLY(rscratch1) NOT_LP64(rsi);
1221 const Register dst_temp = LP64_ONLY(rscratch2) NOT_LP64(rdi);
1222 assert_different_registers(obj, holder_klass, field_index, field_offset, dst_temp);
1223
1224 // Grap the inline field klass
1225 push(holder_klass);
1226 const Register field_klass = holder_klass;
1227 get_value_field_klass(holder_klass, field_index, field_klass);
1228
1229 //check for empty value klass
1230 test_klass_is_empty_value(field_klass, dst_temp, empty_value);
1231
1232 // allocate buffer
1233 push(obj); // save holder
1234 allocate_instance(field_klass, obj, alloc_temp, dst_temp, false, alloc_failed);
1235
1236 // Have a oop instance buffer, copy into it
1237 data_for_oop(obj, dst_temp, field_klass);
1238 pop(alloc_temp); // restore holder
1239 lea(src, Address(alloc_temp, field_offset));
1240 // call_VM_leaf, clobbers a few regs, save restore new obj
1241 push(obj);
1242 access_value_copy(IS_DEST_UNINITIALIZED, src, dst_temp, field_klass);
1243 pop(obj);
1244 pop(holder_klass);
1245 jmp(done);
1246
1247 bind(empty_value);
1248 get_empty_value_oop(field_klass, dst_temp, obj);
1249 pop(holder_klass);
1250 jmp(done);
1251
1252 bind(alloc_failed);
1253 pop(obj);
1254 pop(holder_klass);
1255 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_flattened_field),
1256 obj, field_index, holder_klass);
1257
1258 bind(done);
1259 }
1260
1261 // Lock object
1262 //
1263 // Args:
1264 // rdx, c_rarg1: BasicObjectLock to be used for locking
1265 //
1266 // Kills:
1267 // rax, rbx
1268 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1269 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1270 "The argument is only for looks. It must be c_rarg1");
1271
1272 if (UseHeavyMonitors) {
1273 call_VM(noreg,
1274 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1275 lock_reg);
1276 } else {
1277 Label done;
1278
1279 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1280 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1281 // problematic case where tmp_reg = no_reg.
1282 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1283
1284 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1285 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1286 const int mark_offset = lock_offset +
1287 BasicLock::displaced_header_offset_in_bytes();
1288
1289 Label slow_case;
1290
1291 // Load object pointer into obj_reg
1292 movptr(obj_reg, Address(lock_reg, obj_offset));
1293
1294 if (UseBiasedLocking) {
1295 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1296 }
1297
1298 // Load immediate 1 into swap_reg %rax
1299 movl(swap_reg, (int32_t)1);
1300
1301 // Load (object->mark() | 1) into swap_reg %rax
1302 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1303 if (EnableValhalla && !UseBiasedLocking) {
1304 // For slow path is_always_locked, using biased, which is never natural for !UseBiasLocking
1305 andptr(swap_reg, ~((int) markWord::biased_lock_bit_in_place));
1306 }
1307
1308 // Save (object->mark() | 1) into BasicLock's displaced header
1309 movptr(Address(lock_reg, mark_offset), swap_reg);
1310
1311 assert(lock_offset == 0,
1312 "displaced header must be first word in BasicObjectLock");
1313
1314 lock();
1315 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1316 if (PrintBiasedLockingStatistics) {
1317 cond_inc32(Assembler::zero,
1318 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1319 }
1320 jcc(Assembler::zero, done);
1321
1322 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1323
1324 // Test if the oopMark is an obvious stack pointer, i.e.,
1325 // 1) (mark & zero_bits) == 0, and
1326 // 2) rsp <= mark < mark + os::pagesize()
1327 //
1328 // These 3 tests can be done by evaluating the following
1329 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1330 // assuming both stack pointer and pagesize have their
1331 // least significant bits clear.
1332 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1333 subptr(swap_reg, rsp);
1334 andptr(swap_reg, zero_bits - os::vm_page_size());
1335
1336 // Save the test result, for recursive case, the result is zero
1337 movptr(Address(lock_reg, mark_offset), swap_reg);
1338
1339 if (PrintBiasedLockingStatistics) {
1340 cond_inc32(Assembler::zero,
1341 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1342 }
1343 jcc(Assembler::zero, done);
1344
1345 bind(slow_case);
1346
1347 // Call the runtime routine for slow case
1348 call_VM(noreg,
1349 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1350 lock_reg);
1351
1352 bind(done);
1353 }
1354 }
1355
1356
1357 // Unlocks an object. Used in monitorexit bytecode and
1358 // remove_activation. Throws an IllegalMonitorException if object is
1359 // not locked by current thread.
1360 //
1361 // Args:
1362 // rdx, c_rarg1: BasicObjectLock for lock
1363 //
1364 // Kills:
1365 // rax
1366 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1367 // rscratch1 (scratch reg)
1368 // rax, rbx, rcx, rdx
1369 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1370 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1371 "The argument is only for looks. It must be c_rarg1");
1372
1373 if (UseHeavyMonitors) {
1374 call_VM(noreg,
1375 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1376 lock_reg);
1377 } else {
1378 Label done;
1379
1380 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1381 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1382 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1383
1384 save_bcp(); // Save in case of exception
1385
1386 // Convert from BasicObjectLock structure to object and BasicLock
1387 // structure Store the BasicLock address into %rax
1388 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1389
1390 // Load oop into obj_reg(%c_rarg3)
1391 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1392
1393 // Free entry
1394 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1395
1396 if (UseBiasedLocking) {
1397 biased_locking_exit(obj_reg, header_reg, done);
1398 }
1399
1400 // Load the old header from BasicLock structure
1401 movptr(header_reg, Address(swap_reg,
1402 BasicLock::displaced_header_offset_in_bytes()));
1403
1404 // Test for recursion
1405 testptr(header_reg, header_reg);
1406
1407 // zero for recursive case
1408 jcc(Assembler::zero, done);
1409
1410 // Atomic swap back the old header
1411 lock();
1412 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1413
1414 // zero for simple unlock of a stack-lock case
1415 jcc(Assembler::zero, done);
1416
1417 // Call the runtime routine for slow case.
1418 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1419 obj_reg); // restore obj
1420 call_VM(noreg,
1421 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1422 lock_reg);
1423
1424 bind(done);
1425
1426 restore_bcp();
1427 }
1428 }
1429
1430 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1431 Label& zero_continue) {
1432 assert(ProfileInterpreter, "must be profiling interpreter");
1433 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1434 testptr(mdp, mdp);
1435 jcc(Assembler::zero, zero_continue);
1436 }
1437
1438
1439 // Set the method data pointer for the current bcp.
1440 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1441 assert(ProfileInterpreter, "must be profiling interpreter");
1442 Label set_mdp;
1443 push(rax);
1444 push(rbx);
1445
1446 get_method(rbx);
1447 // Test MDO to avoid the call if it is NULL.
1448 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1449 testptr(rax, rax);
1450 jcc(Assembler::zero, set_mdp);
1451 // rbx: method
1452 // _bcp_register: bcp
1453 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1454 // rax: mdi
1455 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1456 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1457 addptr(rbx, in_bytes(MethodData::data_offset()));
1458 addptr(rax, rbx);
1459 bind(set_mdp);
1460 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1461 pop(rbx);
1462 pop(rax);
1463 }
1464
1465 void InterpreterMacroAssembler::verify_method_data_pointer() {
1466 assert(ProfileInterpreter, "must be profiling interpreter");
1467 #ifdef ASSERT
1468 Label verify_continue;
1469 push(rax);
1470 push(rbx);
1471 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1472 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1473 push(arg3_reg);
1474 push(arg2_reg);
1475 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1476 get_method(rbx);
1477
1478 // If the mdp is valid, it will point to a DataLayout header which is
1479 // consistent with the bcp. The converse is highly probable also.
1480 load_unsigned_short(arg2_reg,
1481 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1482 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1483 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1484 cmpptr(arg2_reg, _bcp_register);
1485 jcc(Assembler::equal, verify_continue);
1486 // rbx: method
1487 // _bcp_register: bcp
1488 // c_rarg3: mdp
1489 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1490 rbx, _bcp_register, arg3_reg);
1491 bind(verify_continue);
1492 pop(arg2_reg);
1493 pop(arg3_reg);
1494 pop(rbx);
1495 pop(rax);
1496 #endif // ASSERT
1497 }
1498
1499
1500 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1501 int constant,
1502 Register value) {
1503 assert(ProfileInterpreter, "must be profiling interpreter");
1504 Address data(mdp_in, constant);
1505 movptr(data, value);
1506 }
1507
1508
1509 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1510 int constant,
1511 bool decrement) {
1512 // Counter address
1513 Address data(mdp_in, constant);
1514
1515 increment_mdp_data_at(data, decrement);
1516 }
1517
1518 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1519 bool decrement) {
1520 assert(ProfileInterpreter, "must be profiling interpreter");
1521 // %%% this does 64bit counters at best it is wasting space
1522 // at worst it is a rare bug when counters overflow
1523
1524 if (decrement) {
1525 // Decrement the register. Set condition codes.
1526 addptr(data, (int32_t) -DataLayout::counter_increment);
1527 // If the decrement causes the counter to overflow, stay negative
1528 Label L;
1529 jcc(Assembler::negative, L);
1530 addptr(data, (int32_t) DataLayout::counter_increment);
1531 bind(L);
1532 } else {
1533 assert(DataLayout::counter_increment == 1,
1534 "flow-free idiom only works with 1");
1535 // Increment the register. Set carry flag.
1536 addptr(data, DataLayout::counter_increment);
1537 // If the increment causes the counter to overflow, pull back by 1.
1538 sbbptr(data, (int32_t)0);
1539 }
1540 }
1541
1542
1543 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1544 Register reg,
1545 int constant,
1546 bool decrement) {
1547 Address data(mdp_in, reg, Address::times_1, constant);
1548
1549 increment_mdp_data_at(data, decrement);
1550 }
1551
1552 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1553 int flag_byte_constant) {
1554 assert(ProfileInterpreter, "must be profiling interpreter");
1555 int header_offset = in_bytes(DataLayout::flags_offset());
1556 int header_bits = flag_byte_constant;
1557 // Set the flag
1558 orb(Address(mdp_in, header_offset), header_bits);
1559 }
1560
1561
1562
1563 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1564 int offset,
1565 Register value,
1566 Register test_value_out,
1567 Label& not_equal_continue) {
1568 assert(ProfileInterpreter, "must be profiling interpreter");
1569 if (test_value_out == noreg) {
1570 cmpptr(value, Address(mdp_in, offset));
1571 } else {
1572 // Put the test value into a register, so caller can use it:
1573 movptr(test_value_out, Address(mdp_in, offset));
1574 cmpptr(test_value_out, value);
1575 }
1576 jcc(Assembler::notEqual, not_equal_continue);
1577 }
1578
1579
1580 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1581 int offset_of_disp) {
1582 assert(ProfileInterpreter, "must be profiling interpreter");
1583 Address disp_address(mdp_in, offset_of_disp);
1584 addptr(mdp_in, disp_address);
1585 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1586 }
1587
1588
1589 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1590 Register reg,
1591 int offset_of_disp) {
1592 assert(ProfileInterpreter, "must be profiling interpreter");
1593 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1594 addptr(mdp_in, disp_address);
1595 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1596 }
1597
1598
1599 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1600 int constant) {
1601 assert(ProfileInterpreter, "must be profiling interpreter");
1602 addptr(mdp_in, constant);
1603 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1604 }
1605
1606
1607 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1608 assert(ProfileInterpreter, "must be profiling interpreter");
1609 push(return_bci); // save/restore across call_VM
1610 call_VM(noreg,
1611 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1612 return_bci);
1613 pop(return_bci);
1614 }
1615
1616
1617 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1618 Register bumped_count) {
1619 if (ProfileInterpreter) {
1620 Label profile_continue;
1621
1622 // If no method data exists, go to profile_continue.
1623 // Otherwise, assign to mdp
1624 test_method_data_pointer(mdp, profile_continue);
1625
1626 // We are taking a branch. Increment the taken count.
1627 // We inline increment_mdp_data_at to return bumped_count in a register
1628 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1629 Address data(mdp, in_bytes(JumpData::taken_offset()));
1630 movptr(bumped_count, data);
1631 assert(DataLayout::counter_increment == 1,
1632 "flow-free idiom only works with 1");
1633 addptr(bumped_count, DataLayout::counter_increment);
1634 sbbptr(bumped_count, 0);
1635 movptr(data, bumped_count); // Store back out
1636
1637 // The method data pointer needs to be updated to reflect the new target.
1638 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1639 bind(profile_continue);
1640 }
1641 }
1642
1643
1644 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1645 if (ProfileInterpreter) {
1646 Label profile_continue;
1647
1648 // If no method data exists, go to profile_continue.
1649 test_method_data_pointer(mdp, profile_continue);
1650
1651 // We are taking a branch. Increment the not taken count.
1652 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1653
1654 // The method data pointer needs to be updated to correspond to
1655 // the next bytecode
1656 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1657 bind(profile_continue);
1658 }
1659 }
1660
1661 void InterpreterMacroAssembler::profile_call(Register mdp) {
1662 if (ProfileInterpreter) {
1663 Label profile_continue;
1664
1665 // If no method data exists, go to profile_continue.
1666 test_method_data_pointer(mdp, profile_continue);
1667
1668 // We are making a call. Increment the count.
1669 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1670
1671 // The method data pointer needs to be updated to reflect the new target.
1672 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1673 bind(profile_continue);
1674 }
1675 }
1676
1677
1678 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1679 if (ProfileInterpreter) {
1680 Label profile_continue;
1681
1682 // If no method data exists, go to profile_continue.
1683 test_method_data_pointer(mdp, profile_continue);
1684
1685 // We are making a call. Increment the count.
1686 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1687
1688 // The method data pointer needs to be updated to reflect the new target.
1689 update_mdp_by_constant(mdp,
1690 in_bytes(VirtualCallData::
1691 virtual_call_data_size()));
1692 bind(profile_continue);
1693 }
1694 }
1695
1696
1697 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1698 Register mdp,
1699 Register reg2,
1700 bool receiver_can_be_null) {
1701 if (ProfileInterpreter) {
1702 Label profile_continue;
1703
1704 // If no method data exists, go to profile_continue.
1705 test_method_data_pointer(mdp, profile_continue);
1706
1707 Label skip_receiver_profile;
1708 if (receiver_can_be_null) {
1709 Label not_null;
1710 testptr(receiver, receiver);
1711 jccb(Assembler::notZero, not_null);
1712 // We are making a call. Increment the count for null receiver.
1713 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1714 jmp(skip_receiver_profile);
1715 bind(not_null);
1716 }
1717
1718 // Record the receiver type.
1719 record_klass_in_profile(receiver, mdp, reg2, true);
1720 bind(skip_receiver_profile);
1721
1722 // The method data pointer needs to be updated to reflect the new target.
1723 #if INCLUDE_JVMCI
1724 if (MethodProfileWidth == 0) {
1725 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1726 }
1727 #else // INCLUDE_JVMCI
1728 update_mdp_by_constant(mdp,
1729 in_bytes(VirtualCallData::
1730 virtual_call_data_size()));
1731 #endif // INCLUDE_JVMCI
1732 bind(profile_continue);
1733 }
1734 }
1735
1736 #if INCLUDE_JVMCI
1737 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1738 assert_different_registers(method, mdp, reg2);
1739 if (ProfileInterpreter && MethodProfileWidth > 0) {
1740 Label profile_continue;
1741
1742 // If no method data exists, go to profile_continue.
1743 test_method_data_pointer(mdp, profile_continue);
1744
1745 Label done;
1746 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1747 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1748 bind(done);
1749
1750 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1751 bind(profile_continue);
1752 }
1753 }
1754 #endif // INCLUDE_JVMCI
1755
1756 // This routine creates a state machine for updating the multi-row
1757 // type profile at a virtual call site (or other type-sensitive bytecode).
1758 // The machine visits each row (of receiver/count) until the receiver type
1759 // is found, or until it runs out of rows. At the same time, it remembers
1760 // the location of the first empty row. (An empty row records null for its
1761 // receiver, and can be allocated for a newly-observed receiver type.)
1762 // Because there are two degrees of freedom in the state, a simple linear
1763 // search will not work; it must be a decision tree. Hence this helper
1764 // function is recursive, to generate the required tree structured code.
1765 // It's the interpreter, so we are trading off code space for speed.
1766 // See below for example code.
1767 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1768 Register receiver, Register mdp,
1769 Register reg2, int start_row,
1770 Label& done, bool is_virtual_call) {
1771 if (TypeProfileWidth == 0) {
1772 if (is_virtual_call) {
1773 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1774 }
1775 #if INCLUDE_JVMCI
1776 else if (EnableJVMCI) {
1777 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1778 }
1779 #endif // INCLUDE_JVMCI
1780 } else {
1781 int non_profiled_offset = -1;
1782 if (is_virtual_call) {
1783 non_profiled_offset = in_bytes(CounterData::count_offset());
1784 }
1785 #if INCLUDE_JVMCI
1786 else if (EnableJVMCI) {
1787 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1788 }
1789 #endif // INCLUDE_JVMCI
1790
1791 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1792 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1793 }
1794 }
1795
1796 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1797 Register reg2, int start_row, Label& done, int total_rows,
1798 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1799 int non_profiled_offset) {
1800 int last_row = total_rows - 1;
1801 assert(start_row <= last_row, "must be work left to do");
1802 // Test this row for both the item and for null.
1803 // Take any of three different outcomes:
1804 // 1. found item => increment count and goto done
1805 // 2. found null => keep looking for case 1, maybe allocate this cell
1806 // 3. found something else => keep looking for cases 1 and 2
1807 // Case 3 is handled by a recursive call.
1808 for (int row = start_row; row <= last_row; row++) {
1809 Label next_test;
1810 bool test_for_null_also = (row == start_row);
1811
1812 // See if the item is item[n].
1813 int item_offset = in_bytes(item_offset_fn(row));
1814 test_mdp_data_at(mdp, item_offset, item,
1815 (test_for_null_also ? reg2 : noreg),
1816 next_test);
1817 // (Reg2 now contains the item from the CallData.)
1818
1819 // The item is item[n]. Increment count[n].
1820 int count_offset = in_bytes(item_count_offset_fn(row));
1821 increment_mdp_data_at(mdp, count_offset);
1822 jmp(done);
1823 bind(next_test);
1824
1825 if (test_for_null_also) {
1826 // Failed the equality check on item[n]... Test for null.
1827 testptr(reg2, reg2);
1828 if (start_row == last_row) {
1829 // The only thing left to do is handle the null case.
1830 if (non_profiled_offset >= 0) {
1831 Label found_null;
1832 jccb(Assembler::zero, found_null);
1833 // Item did not match any saved item and there is no empty row for it.
1834 // Increment total counter to indicate polymorphic case.
1835 increment_mdp_data_at(mdp, non_profiled_offset);
1836 jmp(done);
1837 bind(found_null);
1838 } else {
1839 jcc(Assembler::notZero, done);
1840 }
1841 break;
1842 }
1843 Label found_null;
1844 // Since null is rare, make it be the branch-taken case.
1845 jcc(Assembler::zero, found_null);
1846
1847 // Put all the "Case 3" tests here.
1848 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1849 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1850
1851 // Found a null. Keep searching for a matching item,
1852 // but remember that this is an empty (unused) slot.
1853 bind(found_null);
1854 }
1855 }
1856
1857 // In the fall-through case, we found no matching item, but we
1858 // observed the item[start_row] is NULL.
1859
1860 // Fill in the item field and increment the count.
1861 int item_offset = in_bytes(item_offset_fn(start_row));
1862 set_mdp_data_at(mdp, item_offset, item);
1863 int count_offset = in_bytes(item_count_offset_fn(start_row));
1864 movl(reg2, DataLayout::counter_increment);
1865 set_mdp_data_at(mdp, count_offset, reg2);
1866 if (start_row > 0) {
1867 jmp(done);
1868 }
1869 }
1870
1871 // Example state machine code for three profile rows:
1872 // // main copy of decision tree, rooted at row[1]
1873 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1874 // if (row[0].rec != NULL) {
1875 // // inner copy of decision tree, rooted at row[1]
1876 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1877 // if (row[1].rec != NULL) {
1878 // // degenerate decision tree, rooted at row[2]
1879 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1880 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1881 // row[2].init(rec); goto done;
1882 // } else {
1883 // // remember row[1] is empty
1884 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1885 // row[1].init(rec); goto done;
1886 // }
1887 // } else {
1888 // // remember row[0] is empty
1889 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1890 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1891 // row[0].init(rec); goto done;
1892 // }
1893 // done:
1894
1895 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1896 Register mdp, Register reg2,
1897 bool is_virtual_call) {
1898 assert(ProfileInterpreter, "must be profiling");
1899 Label done;
1900
1901 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1902
1903 bind (done);
1904 }
1905
1906 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1907 Register mdp) {
1908 if (ProfileInterpreter) {
1909 Label profile_continue;
1910 uint row;
1911
1912 // If no method data exists, go to profile_continue.
1913 test_method_data_pointer(mdp, profile_continue);
1914
1915 // Update the total ret count.
1916 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1917
1918 for (row = 0; row < RetData::row_limit(); row++) {
1919 Label next_test;
1920
1921 // See if return_bci is equal to bci[n]:
1922 test_mdp_data_at(mdp,
1923 in_bytes(RetData::bci_offset(row)),
1924 return_bci, noreg,
1925 next_test);
1926
1927 // return_bci is equal to bci[n]. Increment the count.
1928 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1929
1930 // The method data pointer needs to be updated to reflect the new target.
1931 update_mdp_by_offset(mdp,
1932 in_bytes(RetData::bci_displacement_offset(row)));
1933 jmp(profile_continue);
1934 bind(next_test);
1935 }
1936
1937 update_mdp_for_ret(return_bci);
1938
1939 bind(profile_continue);
1940 }
1941 }
1942
1943
1944 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1945 if (ProfileInterpreter) {
1946 Label profile_continue;
1947
1948 // If no method data exists, go to profile_continue.
1949 test_method_data_pointer(mdp, profile_continue);
1950
1951 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1952
1953 // The method data pointer needs to be updated.
1954 int mdp_delta = in_bytes(BitData::bit_data_size());
1955 if (TypeProfileCasts) {
1956 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1957 }
1958 update_mdp_by_constant(mdp, mdp_delta);
1959
1960 bind(profile_continue);
1961 }
1962 }
1963
1964
1965 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1966 if (ProfileInterpreter && TypeProfileCasts) {
1967 Label profile_continue;
1968
1969 // If no method data exists, go to profile_continue.
1970 test_method_data_pointer(mdp, profile_continue);
1971
1972 int count_offset = in_bytes(CounterData::count_offset());
1973 // Back up the address, since we have already bumped the mdp.
1974 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1975
1976 // *Decrement* the counter. We expect to see zero or small negatives.
1977 increment_mdp_data_at(mdp, count_offset, true);
1978
1979 bind (profile_continue);
1980 }
1981 }
1982
1983
1984 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1985 if (ProfileInterpreter) {
1986 Label profile_continue;
1987
1988 // If no method data exists, go to profile_continue.
1989 test_method_data_pointer(mdp, profile_continue);
1990
1991 // The method data pointer needs to be updated.
1992 int mdp_delta = in_bytes(BitData::bit_data_size());
1993 if (TypeProfileCasts) {
1994 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1995
1996 // Record the object type.
1997 record_klass_in_profile(klass, mdp, reg2, false);
1998 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1999 NOT_LP64(restore_locals();) // Restore EDI
2000 }
2001 update_mdp_by_constant(mdp, mdp_delta);
2002
2003 bind(profile_continue);
2004 }
2005 }
2006
2007
2008 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
2009 if (ProfileInterpreter) {
2010 Label profile_continue;
2011
2012 // If no method data exists, go to profile_continue.
2013 test_method_data_pointer(mdp, profile_continue);
2014
2015 // Update the default case count
2016 increment_mdp_data_at(mdp,
2017 in_bytes(MultiBranchData::default_count_offset()));
2018
2019 // The method data pointer needs to be updated.
2020 update_mdp_by_offset(mdp,
2021 in_bytes(MultiBranchData::
2022 default_displacement_offset()));
2023
2024 bind(profile_continue);
2025 }
2026 }
2027
2028
2029 void InterpreterMacroAssembler::profile_switch_case(Register index,
2030 Register mdp,
2031 Register reg2) {
2032 if (ProfileInterpreter) {
2033 Label profile_continue;
2034
2035 // If no method data exists, go to profile_continue.
2036 test_method_data_pointer(mdp, profile_continue);
2037
2038 // Build the base (index * per_case_size_in_bytes()) +
2039 // case_array_offset_in_bytes()
2040 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
2041 imulptr(index, reg2); // XXX l ?
2042 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
2043
2044 // Update the case count
2045 increment_mdp_data_at(mdp,
2046 index,
2047 in_bytes(MultiBranchData::relative_count_offset()));
2048
2049 // The method data pointer needs to be updated.
2050 update_mdp_by_offset(mdp,
2051 index,
2052 in_bytes(MultiBranchData::
2053 relative_displacement_offset()));
2054
2055 bind(profile_continue);
2056 }
2057 }
2058
2059 void InterpreterMacroAssembler::profile_array(Register mdp,
2060 Register array,
2061 Register tmp) {
2062 if (ProfileInterpreter) {
2063 Label profile_continue;
2064
2065 // If no method data exists, go to profile_continue.
2066 test_method_data_pointer(mdp, profile_continue);
2067
2068 mov(tmp, array);
2069 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadStoreData::array_offset())));
2070
2071 Label not_flat;
2072 test_non_flattened_array_oop(array, tmp, not_flat);
2073
2074 set_mdp_flag_at(mdp, ArrayLoadStoreData::flat_array_byte_constant());
2075
2076 bind(not_flat);
2077
2078 Label not_null_free;
2079 test_non_null_free_array_oop(array, tmp, not_null_free);
2080
2081 set_mdp_flag_at(mdp, ArrayLoadStoreData::null_free_array_byte_constant());
2082
2083 bind(not_null_free);
2084
2085 bind(profile_continue);
2086 }
2087 }
2088
2089 void InterpreterMacroAssembler::profile_element(Register mdp,
2090 Register element,
2091 Register tmp) {
2092 if (ProfileInterpreter) {
2093 Label profile_continue;
2094
2095 // If no method data exists, go to profile_continue.
2096 test_method_data_pointer(mdp, profile_continue);
2097
2098 mov(tmp, element);
2099 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadStoreData::element_offset())));
2100
2101 // The method data pointer needs to be updated.
2102 update_mdp_by_constant(mdp, in_bytes(ArrayLoadStoreData::array_load_store_data_size()));
2103
2104 bind(profile_continue);
2105 }
2106 }
2107
2108 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
2109 if (state == atos) {
2110 MacroAssembler::verify_oop(reg);
2111 }
2112 }
2113
2114 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
2115 #ifndef _LP64
2116 if ((state == ftos && UseSSE < 1) ||
2117 (state == dtos && UseSSE < 2)) {
2118 MacroAssembler::verify_FPU(stack_depth);
2119 }
2120 #endif
2121 }
2122
2123 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
2124 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
2125 int increment, Address mask,
2126 Register scratch, bool preloaded,
2127 Condition cond, Label* where) {
2128 if (!preloaded) {
2129 movl(scratch, counter_addr);
2130 }
2131 incrementl(scratch, increment);
2132 movl(counter_addr, scratch);
2133 andl(scratch, mask);
2134 if (where != NULL) {
2135 jcc(cond, *where);
2136 }
2137 }
2138
2139 void InterpreterMacroAssembler::notify_method_entry() {
2140 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2141 // track stack depth. If it is possible to enter interp_only_mode we add
2142 // the code to check if the event should be sent.
2143 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2144 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2145 if (JvmtiExport::can_post_interpreter_events()) {
2146 Label L;
2147 NOT_LP64(get_thread(rthread);)
2148 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2149 testl(rdx, rdx);
2150 jcc(Assembler::zero, L);
2151 call_VM(noreg, CAST_FROM_FN_PTR(address,
2152 InterpreterRuntime::post_method_entry));
2153 bind(L);
2154 }
2155
2156 {
2157 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2158 NOT_LP64(get_thread(rthread);)
2159 get_method(rarg);
2160 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2161 rthread, rarg);
2162 }
2163
2164 // RedefineClasses() tracing support for obsolete method entry
2165 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2166 NOT_LP64(get_thread(rthread);)
2167 get_method(rarg);
2168 call_VM_leaf(
2169 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2170 rthread, rarg);
2171 }
2172 }
2173
2174
2175 void InterpreterMacroAssembler::notify_method_exit(
2176 TosState state, NotifyMethodExitMode mode) {
2177 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2178 // track stack depth. If it is possible to enter interp_only_mode we add
2179 // the code to check if the event should be sent.
2180 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2181 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2182 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2183 Label L;
2184 // Note: frame::interpreter_frame_result has a dependency on how the
2185 // method result is saved across the call to post_method_exit. If this
2186 // is changed then the interpreter_frame_result implementation will
2187 // need to be updated too.
2188
2189 // template interpreter will leave the result on the top of the stack.
2190 push(state);
2191 NOT_LP64(get_thread(rthread);)
2192 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2193 testl(rdx, rdx);
2194 jcc(Assembler::zero, L);
2195 call_VM(noreg,
2196 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2197 bind(L);
2198 pop(state);
2199 }
2200
2201 {
2202 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2203 push(state);
2204 NOT_LP64(get_thread(rthread);)
2205 get_method(rarg);
2206 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2207 rthread, rarg);
2208 pop(state);
2209 }
2210 }