1 /*
2 * Copyright (c) 1997, 2022, 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/inlineKlass.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "prims/jvmtiThreadState.hpp"
38 #include "runtime/basicLock.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/javaThread.hpp"
41 #include "runtime/safepointMechanism.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "utilities/powerOfTwo.hpp"
44
45 // Implementation of InterpreterMacroAssembler
46
47 void InterpreterMacroAssembler::jump_to_entry(address entry) {
48 assert(entry, "Entry must have been generated by now");
49 jump(RuntimeAddress(entry));
50 }
51
52 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
53 Label update, next, none;
54
55 interp_verify_oop(obj, atos);
56
57 testptr(obj, obj);
58 jccb(Assembler::notZero, update);
59 orptr(mdo_addr, TypeEntries::null_seen);
60 jmpb(next);
61
62 bind(update);
63 load_klass(obj, obj, rscratch1);
64
65 xorptr(obj, mdo_addr);
66 testptr(obj, TypeEntries::type_klass_mask);
67 jccb(Assembler::zero, next); // klass seen before, nothing to
68 // do. The unknown bit may have been
69 // set already but no need to check.
70
71 testptr(obj, TypeEntries::type_unknown);
72 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
73
74 cmpptr(mdo_addr, 0);
75 jccb(Assembler::equal, none);
76 cmpptr(mdo_addr, TypeEntries::null_seen);
77 jccb(Assembler::equal, none);
78 // There is a chance that the checks above (re-reading profiling
79 // data from memory) fail if another thread has just set the
80 // profiling to this obj's klass
81 xorptr(obj, mdo_addr);
82 testptr(obj, TypeEntries::type_klass_mask);
83 jccb(Assembler::zero, next);
84
85 // different than before. Cannot keep accurate profile.
86 orptr(mdo_addr, TypeEntries::type_unknown);
87 jmpb(next);
88
89 bind(none);
90 // first time here. Set profile type.
91 movptr(mdo_addr, obj);
92
93 bind(next);
94 }
95
96 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
97 if (!ProfileInterpreter) {
98 return;
99 }
100
101 if (MethodData::profile_arguments() || MethodData::profile_return()) {
102 Label profile_continue;
103
104 test_method_data_pointer(mdp, profile_continue);
105
106 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
107
108 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
109 jcc(Assembler::notEqual, profile_continue);
110
111 if (MethodData::profile_arguments()) {
112 Label done;
113 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
114 addptr(mdp, off_to_args);
115
116 for (int i = 0; i < TypeProfileArgsLimit; i++) {
117 if (i > 0 || MethodData::profile_return()) {
118 // If return value type is profiled we may have no argument to profile
119 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
120 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
121 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
122 jcc(Assembler::less, done);
123 }
124 movptr(tmp, Address(callee, Method::const_offset()));
125 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
126 // stack offset o (zero based) from the start of the argument
127 // list, for n arguments translates into offset n - o - 1 from
128 // the end of the argument list
129 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
130 subl(tmp, 1);
131 Address arg_addr = argument_address(tmp);
132 movptr(tmp, arg_addr);
133
134 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
135 profile_obj_type(tmp, mdo_arg_addr);
136
137 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
138 addptr(mdp, to_add);
139 off_to_args += to_add;
140 }
141
142 if (MethodData::profile_return()) {
143 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
144 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
145 }
146
147 bind(done);
148
149 if (MethodData::profile_return()) {
150 // We're right after the type profile for the last
151 // argument. tmp is the number of cells left in the
152 // CallTypeData/VirtualCallTypeData to reach its end. Non null
153 // if there's a return to profile.
154 assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
155 shll(tmp, log2i_exact((int)DataLayout::cell_size));
156 addptr(mdp, tmp);
157 }
158 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
159 } else {
160 assert(MethodData::profile_return(), "either profile call args or call ret");
161 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
162 }
163
164 // mdp points right after the end of the
165 // CallTypeData/VirtualCallTypeData, right after the cells for the
166 // return value type if there's one
167
168 bind(profile_continue);
169 }
170 }
171
172 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
173 assert_different_registers(mdp, ret, tmp, _bcp_register);
174 if (ProfileInterpreter && MethodData::profile_return()) {
175 Label profile_continue;
176
177 test_method_data_pointer(mdp, profile_continue);
178
179 if (MethodData::profile_return_jsr292_only()) {
180 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
181
182 // If we don't profile all invoke bytecodes we must make sure
183 // it's a bytecode we indeed profile. We can't go back to the
184 // beginning of the ProfileData we intend to update to check its
185 // type because we're right after it and we don't known its
186 // length
187 Label do_profile;
188 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
189 jcc(Assembler::equal, do_profile);
190 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
191 jcc(Assembler::equal, do_profile);
192 get_method(tmp);
193 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), static_cast<int>(vmIntrinsics::_compiledLambdaForm));
194 jcc(Assembler::notEqual, profile_continue);
195
196 bind(do_profile);
197 }
198
199 Address mdo_ret_addr(mdp, -in_bytes(SingleTypeEntry::size()));
200 mov(tmp, ret);
201 profile_obj_type(tmp, mdo_ret_addr);
202
203 bind(profile_continue);
204 }
205 }
206
207 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
208 if (ProfileInterpreter && MethodData::profile_parameters()) {
209 Label profile_continue;
210
211 test_method_data_pointer(mdp, profile_continue);
212
213 // Load the offset of the area within the MDO used for
214 // parameters. If it's negative we're not profiling any parameters
215 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
216 testl(tmp1, tmp1);
217 jcc(Assembler::negative, profile_continue);
218
219 // Compute a pointer to the area for parameters from the offset
220 // and move the pointer to the slot for the last
221 // parameters. Collect profiling from last parameter down.
222 // mdo start + parameters offset + array length - 1
223 addptr(mdp, tmp1);
224 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
225 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
226
227 Label loop;
228 bind(loop);
229
230 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
231 int type_base = in_bytes(ParametersTypeData::type_offset(0));
232 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
233 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
234 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
235
236 // load offset on the stack from the slot for this parameter
237 movptr(tmp2, arg_off);
238 negptr(tmp2);
239 // read the parameter from the local area
240 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
241
242 // profile the parameter
243 profile_obj_type(tmp2, arg_type);
244
245 // go to next parameter
246 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
247 jcc(Assembler::positive, loop);
248
249 bind(profile_continue);
250 }
251 }
252
253 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
254 int number_of_arguments) {
255 // interpreter specific
256 //
257 // Note: No need to save/restore bcp & locals registers
258 // since these are callee saved registers and no blocking/
259 // GC can happen in leaf calls.
260 // Further Note: DO NOT save/restore bcp/locals. If a caller has
261 // already saved them so that it can use rsi/rdi as temporaries
262 // then a save/restore here will DESTROY the copy the caller
263 // saved! There used to be a save_bcp() that only happened in
264 // the ASSERT path (no restore_bcp). Which caused bizarre failures
265 // when jvm built with ASSERTs.
266 #ifdef ASSERT
267 {
268 Label L;
269 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
270 jcc(Assembler::equal, L);
271 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
272 " last_sp != NULL");
273 bind(L);
274 }
275 #endif
276 // super call
277 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
278 // interpreter specific
279 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
280 // but since they may not have been saved (and we don't want to
281 // save them here (see note above) the assert is invalid.
282 }
283
284 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
285 Register java_thread,
286 Register last_java_sp,
287 address entry_point,
288 int number_of_arguments,
289 bool check_exceptions) {
290 // interpreter specific
291 //
292 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
293 // really make a difference for these runtime calls, since they are
294 // slow anyway. Btw., bcp must be saved/restored since it may change
295 // due to GC.
296 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
297 save_bcp();
298 #ifdef ASSERT
299 {
300 Label L;
301 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
302 jcc(Assembler::equal, L);
303 stop("InterpreterMacroAssembler::call_VM_base:"
304 " last_sp != NULL");
305 bind(L);
306 }
307 #endif /* ASSERT */
308 // super call
309 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
310 entry_point, number_of_arguments,
311 check_exceptions);
312 // interpreter specific
313 restore_bcp();
314 restore_locals();
315 }
316
317 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
318 if (JvmtiExport::can_pop_frame()) {
319 Label L;
320 // Initiate popframe handling only if it is not already being
321 // processed. If the flag has the popframe_processing bit set, it
322 // means that this code is called *during* popframe handling - we
323 // don't want to reenter.
324 // This method is only called just after the call into the vm in
325 // call_VM_base, so the arg registers are available.
326 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
327 LP64_ONLY(c_rarg0);
328 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
329 testl(pop_cond, JavaThread::popframe_pending_bit);
330 jcc(Assembler::zero, L);
331 testl(pop_cond, JavaThread::popframe_processing_bit);
332 jcc(Assembler::notZero, L);
333 // Call Interpreter::remove_activation_preserving_args_entry() to get the
334 // address of the same-named entrypoint in the generated interpreter code.
335 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
336 jmp(rax);
337 bind(L);
338 NOT_LP64(get_thread(java_thread);)
339 }
340 }
341
342 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
343 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
344 NOT_LP64(get_thread(thread);)
345 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
346 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
347 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
348 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
349 #ifdef _LP64
350 switch (state) {
351 case atos: movptr(rax, oop_addr);
352 movptr(oop_addr, NULL_WORD);
353 interp_verify_oop(rax, state); break;
354 case ltos: movptr(rax, val_addr); break;
355 case btos: // fall through
356 case ztos: // fall through
357 case ctos: // fall through
358 case stos: // fall through
359 case itos: movl(rax, val_addr); break;
360 case ftos: load_float(val_addr); break;
361 case dtos: load_double(val_addr); break;
362 case vtos: /* nothing to do */ break;
363 default : ShouldNotReachHere();
364 }
365 // Clean up tos value in the thread object
366 movl(tos_addr, ilgl);
367 movl(val_addr, NULL_WORD);
368 #else
369 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
370 + in_ByteSize(wordSize));
371 switch (state) {
372 case atos: movptr(rax, oop_addr);
373 movptr(oop_addr, NULL_WORD);
374 interp_verify_oop(rax, state); break;
375 case ltos:
376 movl(rdx, val_addr1); // fall through
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 #endif // _LP64
388 // Clean up tos value in the thread object
389 movl(tos_addr, ilgl);
390 movptr(val_addr, NULL_WORD);
391 NOT_LP64(movptr(val_addr1, NULL_WORD);)
392 }
393
394
395 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
396 if (JvmtiExport::can_force_early_return()) {
397 Label L;
398 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
399 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
400
401 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
402 testptr(tmp, tmp);
403 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
404
405 // Initiate earlyret handling only if it is not already being processed.
406 // If the flag has the earlyret_processing bit set, it means that this code
407 // is called *during* earlyret handling - we don't want to reenter.
408 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
409 cmpl(tmp, JvmtiThreadState::earlyret_pending);
410 jcc(Assembler::notEqual, L);
411
412 // Call Interpreter::remove_activation_early_entry() to get the address of the
413 // same-named entrypoint in the generated interpreter code.
414 NOT_LP64(get_thread(java_thread);)
415 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
416 #ifdef _LP64
417 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
418 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
419 #else
420 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
421 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
422 #endif // _LP64
423 jmp(rax);
424 bind(L);
425 NOT_LP64(get_thread(java_thread);)
426 }
427 }
428
429 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
430 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
431 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
432 bswapl(reg);
433 shrl(reg, 16);
434 }
435
436 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
437 int bcp_offset,
438 size_t index_size) {
439 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
440 if (index_size == sizeof(u2)) {
441 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
442 } else if (index_size == sizeof(u4)) {
443 movl(index, Address(_bcp_register, bcp_offset));
444 // Check if the secondary index definition is still ~x, otherwise
445 // we have to change the following assembler code to calculate the
446 // plain index.
447 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
448 notl(index); // convert to plain index
449 } else if (index_size == sizeof(u1)) {
450 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
451 } else {
452 ShouldNotReachHere();
453 }
454 }
455
456 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
457 Register index,
458 int bcp_offset,
459 size_t index_size) {
460 assert_different_registers(cache, index);
461 get_cache_index_at_bcp(index, bcp_offset, index_size);
462 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
463 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
464 // convert from field index to ConstantPoolCacheEntry index
465 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
466 shll(index, 2);
467 }
468
469 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
470 Register index,
471 Register bytecode,
472 int byte_no,
473 int bcp_offset,
474 size_t index_size) {
475 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
476 // We use a 32-bit load here since the layout of 64-bit words on
477 // little-endian machines allow us that.
478 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
479 const int shift_count = (1 + byte_no) * BitsPerByte;
480 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
481 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
482 "correct shift count");
483 shrl(bytecode, shift_count);
484 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
485 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
486 }
487
488 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
489 Register tmp,
490 int bcp_offset,
491 size_t index_size) {
492 assert_different_registers(cache, tmp);
493
494 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
495 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
496 // convert from field index to ConstantPoolCacheEntry index
497 // and from word offset to byte offset
498 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
499 shll(tmp, 2 + LogBytesPerWord);
500 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
501 // skip past the header
502 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
503 addptr(cache, tmp); // construct pointer to cache entry
504 }
505
506 // Load object from cpool->resolved_references(index)
507 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result,
508 Register index,
509 Register tmp) {
510 assert_different_registers(result, index);
511
512 get_constant_pool(result);
513 // load pointer for resolved_references[] objArray
514 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
515 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
516 resolve_oop_handle(result, tmp);
517 load_heap_oop(result, Address(result, index,
518 UseCompressedOops ? Address::times_4 : Address::times_ptr,
519 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
520 }
521
522 // load cpool->resolved_klass_at(index)
523 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass,
524 Register cpool,
525 Register index) {
526 assert_different_registers(cpool, index);
527
528 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
529 Register resolved_klasses = cpool;
530 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
531 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
532 }
533
534 void InterpreterMacroAssembler::load_resolved_method_at_index(int byte_no,
535 Register method,
536 Register cache,
537 Register index) {
538 assert_different_registers(cache, index);
539
540 const int method_offset = in_bytes(
541 ConstantPoolCache::base_offset() +
542 ((byte_no == TemplateTable::f2_byte)
543 ? ConstantPoolCacheEntry::f2_offset()
544 : ConstantPoolCacheEntry::f1_offset()));
545
546 movptr(method, Address(cache, index, Address::times_ptr, method_offset)); // get f1 Method*
547 }
548
549 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
550 // subtype of super_klass.
551 //
552 // Args:
553 // rax: superklass
554 // Rsub_klass: subklass
555 //
556 // Kills:
557 // rcx, rdi
558 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
559 Label& ok_is_subtype,
560 bool profile) {
561 assert(Rsub_klass != rax, "rax holds superklass");
562 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
563 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
564 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
565 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
566
567 // Profile the not-null value's klass.
568 if (profile) {
569 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
570 }
571
572 // Do the check.
573 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
574
575 // Profile the failure of the check.
576 if (profile) {
577 profile_typecheck_failed(rcx); // blows rcx
578 }
579 }
580
581
582 #ifndef _LP64
583 void InterpreterMacroAssembler::f2ieee() {
584 if (IEEEPrecision) {
585 fstp_s(Address(rsp, 0));
586 fld_s(Address(rsp, 0));
587 }
588 }
589
590
591 void InterpreterMacroAssembler::d2ieee() {
592 if (IEEEPrecision) {
593 fstp_d(Address(rsp, 0));
594 fld_d(Address(rsp, 0));
595 }
596 }
597 #endif // _LP64
598
599 // Java Expression Stack
600
601 void InterpreterMacroAssembler::pop_ptr(Register r) {
602 pop(r);
603 }
604
605 void InterpreterMacroAssembler::push_ptr(Register r) {
606 push(r);
607 }
608
609 void InterpreterMacroAssembler::push_i(Register r) {
610 push(r);
611 }
612
613 void InterpreterMacroAssembler::push_i_or_ptr(Register r) {
614 push(r);
615 }
616
617 void InterpreterMacroAssembler::push_f(XMMRegister r) {
618 subptr(rsp, wordSize);
619 movflt(Address(rsp, 0), r);
620 }
621
622 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
623 movflt(r, Address(rsp, 0));
624 addptr(rsp, wordSize);
625 }
626
627 void InterpreterMacroAssembler::push_d(XMMRegister r) {
628 subptr(rsp, 2 * wordSize);
629 movdbl(Address(rsp, 0), r);
630 }
631
632 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
633 movdbl(r, Address(rsp, 0));
634 addptr(rsp, 2 * Interpreter::stackElementSize);
635 }
636
637 #ifdef _LP64
638 void InterpreterMacroAssembler::pop_i(Register r) {
639 // XXX can't use pop currently, upper half non clean
640 movl(r, Address(rsp, 0));
641 addptr(rsp, wordSize);
642 }
643
644 void InterpreterMacroAssembler::pop_l(Register r) {
645 movq(r, Address(rsp, 0));
646 addptr(rsp, 2 * Interpreter::stackElementSize);
647 }
648
649 void InterpreterMacroAssembler::push_l(Register r) {
650 subptr(rsp, 2 * wordSize);
651 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
652 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
653 }
654
655 void InterpreterMacroAssembler::pop(TosState state) {
656 switch (state) {
657 case atos: pop_ptr(); break;
658 case btos:
659 case ztos:
660 case ctos:
661 case stos:
662 case itos: pop_i(); break;
663 case ltos: pop_l(); break;
664 case ftos: pop_f(xmm0); break;
665 case dtos: pop_d(xmm0); break;
666 case vtos: /* nothing to do */ break;
667 default: ShouldNotReachHere();
668 }
669 interp_verify_oop(rax, state);
670 }
671
672 void InterpreterMacroAssembler::push(TosState state) {
673 interp_verify_oop(rax, state);
674 switch (state) {
675 case atos: push_ptr(); break;
676 case btos:
677 case ztos:
678 case ctos:
679 case stos:
680 case itos: push_i(); break;
681 case ltos: push_l(); break;
682 case ftos: push_f(xmm0); break;
683 case dtos: push_d(xmm0); break;
684 case vtos: /* nothing to do */ break;
685 default : ShouldNotReachHere();
686 }
687 }
688 #else
689 void InterpreterMacroAssembler::pop_i(Register r) {
690 pop(r);
691 }
692
693 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
694 pop(lo);
695 pop(hi);
696 }
697
698 void InterpreterMacroAssembler::pop_f() {
699 fld_s(Address(rsp, 0));
700 addptr(rsp, 1 * wordSize);
701 }
702
703 void InterpreterMacroAssembler::pop_d() {
704 fld_d(Address(rsp, 0));
705 addptr(rsp, 2 * wordSize);
706 }
707
708
709 void InterpreterMacroAssembler::pop(TosState state) {
710 switch (state) {
711 case atos: pop_ptr(rax); break;
712 case btos: // fall through
713 case ztos: // fall through
714 case ctos: // fall through
715 case stos: // fall through
716 case itos: pop_i(rax); break;
717 case ltos: pop_l(rax, rdx); break;
718 case ftos:
719 if (UseSSE >= 1) {
720 pop_f(xmm0);
721 } else {
722 pop_f();
723 }
724 break;
725 case dtos:
726 if (UseSSE >= 2) {
727 pop_d(xmm0);
728 } else {
729 pop_d();
730 }
731 break;
732 case vtos: /* nothing to do */ break;
733 default : ShouldNotReachHere();
734 }
735 interp_verify_oop(rax, state);
736 }
737
738
739 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
740 push(hi);
741 push(lo);
742 }
743
744 void InterpreterMacroAssembler::push_f() {
745 // Do not schedule for no AGI! Never write beyond rsp!
746 subptr(rsp, 1 * wordSize);
747 fstp_s(Address(rsp, 0));
748 }
749
750 void InterpreterMacroAssembler::push_d() {
751 // Do not schedule for no AGI! Never write beyond rsp!
752 subptr(rsp, 2 * wordSize);
753 fstp_d(Address(rsp, 0));
754 }
755
756
757 void InterpreterMacroAssembler::push(TosState state) {
758 interp_verify_oop(rax, state);
759 switch (state) {
760 case atos: push_ptr(rax); break;
761 case btos: // fall through
762 case ztos: // fall through
763 case ctos: // fall through
764 case stos: // fall through
765 case itos: push_i(rax); break;
766 case ltos: push_l(rax, rdx); break;
767 case ftos:
768 if (UseSSE >= 1) {
769 push_f(xmm0);
770 } else {
771 push_f();
772 }
773 break;
774 case dtos:
775 if (UseSSE >= 2) {
776 push_d(xmm0);
777 } else {
778 push_d();
779 }
780 break;
781 case vtos: /* nothing to do */ break;
782 default : ShouldNotReachHere();
783 }
784 }
785 #endif // _LP64
786
787
788 // Helpers for swap and dup
789 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
790 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
791 }
792
793 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
794 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
795 }
796
797
798 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
799 // set sender sp
800 lea(_bcp_register, Address(rsp, wordSize));
801 // record last_sp
802 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
803 }
804
805
806 // Jump to from_interpreted entry of a call unless single stepping is possible
807 // in this thread in which case we must call the i2i entry
808 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
809 prepare_to_jump_from_interpreted();
810
811 if (JvmtiExport::can_post_interpreter_events()) {
812 Label run_compiled_code;
813 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
814 // compiled code in threads for which the event is enabled. Check here for
815 // interp_only_mode if these events CAN be enabled.
816 // interp_only is an int, on little endian it is sufficient to test the byte only
817 // Is a cmpl faster?
818 LP64_ONLY(temp = r15_thread;)
819 NOT_LP64(get_thread(temp);)
820 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
821 jccb(Assembler::zero, run_compiled_code);
822 jmp(Address(method, Method::interpreter_entry_offset()));
823 bind(run_compiled_code);
824 }
825
826 jmp(Address(method, Method::from_interpreted_offset()));
827 }
828
829 // The following two routines provide a hook so that an implementation
830 // can schedule the dispatch in two parts. x86 does not do this.
831 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
832 // Nothing x86 specific to be done here
833 }
834
835 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
836 dispatch_next(state, step);
837 }
838
839 void InterpreterMacroAssembler::dispatch_base(TosState state,
840 address* table,
841 bool verifyoop,
842 bool generate_poll) {
843 verify_FPU(1, state);
844 if (VerifyActivationFrameSize) {
845 Label L;
846 mov(rcx, rbp);
847 subptr(rcx, rsp);
848 int32_t min_frame_size =
849 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
850 wordSize;
851 cmpptr(rcx, min_frame_size);
852 jcc(Assembler::greaterEqual, L);
853 stop("broken stack frame");
854 bind(L);
855 }
856 if (verifyoop) {
857 interp_verify_oop(rax, state);
858 }
859
860 address* const safepoint_table = Interpreter::safept_table(state);
861 #ifdef _LP64
862 Label no_safepoint, dispatch;
863 if (table != safepoint_table && generate_poll) {
864 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
865 testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
866
867 jccb(Assembler::zero, no_safepoint);
868 lea(rscratch1, ExternalAddress((address)safepoint_table));
869 jmpb(dispatch);
870 }
871
872 bind(no_safepoint);
873 lea(rscratch1, ExternalAddress((address)table));
874 bind(dispatch);
875 jmp(Address(rscratch1, rbx, Address::times_8));
876
877 #else
878 Address index(noreg, rbx, Address::times_ptr);
879 if (table != safepoint_table && generate_poll) {
880 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
881 Label no_safepoint;
882 const Register thread = rcx;
883 get_thread(thread);
884 testb(Address(thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
885
886 jccb(Assembler::zero, no_safepoint);
887 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
888 jump(dispatch_addr, noreg);
889 bind(no_safepoint);
890 }
891
892 {
893 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
894 jump(dispatch_addr, noreg);
895 }
896 #endif // _LP64
897 }
898
899 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
900 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
901 }
902
903 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
904 dispatch_base(state, Interpreter::normal_table(state));
905 }
906
907 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
908 dispatch_base(state, Interpreter::normal_table(state), false);
909 }
910
911
912 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
913 // load next bytecode (load before advancing _bcp_register to prevent AGI)
914 load_unsigned_byte(rbx, Address(_bcp_register, step));
915 // advance _bcp_register
916 increment(_bcp_register, step);
917 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
918 }
919
920 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
921 // load current bytecode
922 load_unsigned_byte(rbx, Address(_bcp_register, 0));
923 dispatch_base(state, table);
924 }
925
926 void InterpreterMacroAssembler::narrow(Register result) {
927
928 // Get method->_constMethod->_result_type
929 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
930 movptr(rcx, Address(rcx, Method::const_offset()));
931 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
932
933 Label done, notBool, notByte, notChar;
934
935 // common case first
936 cmpl(rcx, T_INT);
937 jcc(Assembler::equal, done);
938
939 // mask integer result to narrower return type.
940 cmpl(rcx, T_BOOLEAN);
941 jcc(Assembler::notEqual, notBool);
942 andl(result, 0x1);
943 jmp(done);
944
945 bind(notBool);
946 cmpl(rcx, T_BYTE);
947 jcc(Assembler::notEqual, notByte);
948 LP64_ONLY(movsbl(result, result);)
949 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
950 NOT_LP64(sarl(result, 24);) // and sign-extend byte
951 jmp(done);
952
953 bind(notByte);
954 cmpl(rcx, T_CHAR);
955 jcc(Assembler::notEqual, notChar);
956 LP64_ONLY(movzwl(result, result);)
957 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
958 jmp(done);
959
960 bind(notChar);
961 // cmpl(rcx, T_SHORT); // all that's left
962 // jcc(Assembler::notEqual, done);
963 LP64_ONLY(movswl(result, result);)
964 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
965 NOT_LP64(sarl(result, 16);) // and sign-extend short
966
967 // Nothing to do for T_INT
968 bind(done);
969 }
970
971 // remove activation
972 //
973 // Apply stack watermark barrier.
974 // Unlock the receiver if this is a synchronized method.
975 // Unlock any Java monitors from synchronized blocks.
976 // Remove the activation from the stack.
977 //
978 // If there are locked Java monitors
979 // If throw_monitor_exception
980 // throws IllegalMonitorStateException
981 // Else if install_monitor_exception
982 // installs IllegalMonitorStateException
983 // Else
984 // no error processing
985 void InterpreterMacroAssembler::remove_activation(
986 TosState state,
987 Register ret_addr,
988 bool throw_monitor_exception,
989 bool install_monitor_exception,
990 bool notify_jvmdi) {
991 // Note: Registers rdx xmm0 may be in use for the
992 // result check if synchronized method
993 Label unlocked, unlock, no_unlock;
994
995 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
996 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
997 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
998 // monitor pointers need different register
999 // because rdx may have the result in it
1000 NOT_LP64(get_thread(rthread);)
1001
1002 // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
1003 // that would normally not be safe to use. Such bad returns into unsafe territory of
1004 // the stack, will call InterpreterRuntime::at_unwind.
1005 Label slow_path;
1006 Label fast_path;
1007 safepoint_poll(slow_path, rthread, true /* at_return */, false /* in_nmethod */);
1008 jmp(fast_path);
1009 bind(slow_path);
1010 push(state);
1011 set_last_Java_frame(rthread, noreg, rbp, (address)pc(), rscratch1);
1012 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
1013 NOT_LP64(get_thread(rthread);) // call_VM clobbered it, restore
1014 reset_last_Java_frame(rthread, true);
1015 pop(state);
1016 bind(fast_path);
1017
1018 // get the value of _do_not_unlock_if_synchronized into rdx
1019 const Address do_not_unlock_if_synchronized(rthread,
1020 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1021 movbool(rbx, do_not_unlock_if_synchronized);
1022 movbool(do_not_unlock_if_synchronized, false); // reset the flag
1023
1024 // get method access flags
1025 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1026 movl(rcx, Address(rcx, Method::access_flags_offset()));
1027 testl(rcx, JVM_ACC_SYNCHRONIZED);
1028 jcc(Assembler::zero, unlocked);
1029
1030 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
1031 // is set.
1032 testbool(rbx);
1033 jcc(Assembler::notZero, no_unlock);
1034
1035 // unlock monitor
1036 push(state); // save result
1037
1038 // BasicObjectLock will be first in list, since this is a
1039 // synchronized method. However, need to check that the object has
1040 // not been unlocked by an explicit monitorexit bytecode.
1041 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
1042 wordSize - (int) sizeof(BasicObjectLock));
1043 // We use c_rarg1/rdx so that if we go slow path it will be the correct
1044 // register for unlock_object to pass to VM directly
1045 lea(robj, monitor); // address of first monitor
1046
1047 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1048 testptr(rax, rax);
1049 jcc(Assembler::notZero, unlock);
1050
1051 pop(state);
1052 if (throw_monitor_exception) {
1053 // Entry already unlocked, need to throw exception
1054 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1055 call_VM(noreg, CAST_FROM_FN_PTR(address,
1056 InterpreterRuntime::throw_illegal_monitor_state_exception));
1057 should_not_reach_here();
1058 } else {
1059 // Monitor already unlocked during a stack unroll. If requested,
1060 // install an illegal_monitor_state_exception. Continue with
1061 // stack unrolling.
1062 if (install_monitor_exception) {
1063 NOT_LP64(empty_FPU_stack();)
1064 call_VM(noreg, CAST_FROM_FN_PTR(address,
1065 InterpreterRuntime::new_illegal_monitor_state_exception));
1066 }
1067 jmp(unlocked);
1068 }
1069
1070 bind(unlock);
1071 unlock_object(robj);
1072 pop(state);
1073
1074 // Check that for block-structured locking (i.e., that all locked
1075 // objects has been unlocked)
1076 bind(unlocked);
1077
1078 // rax, rdx: Might contain return value
1079
1080 // Check that all monitors are unlocked
1081 {
1082 Label loop, exception, entry, restart;
1083 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1084 const Address monitor_block_top(
1085 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1086 const Address monitor_block_bot(
1087 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1088
1089 bind(restart);
1090 // We use c_rarg1 so that if we go slow path it will be the correct
1091 // register for unlock_object to pass to VM directly
1092 movptr(rmon, monitor_block_top); // points to current entry, starting
1093 // with top-most entry
1094 lea(rbx, monitor_block_bot); // points to word before bottom of
1095 // monitor block
1096 jmp(entry);
1097
1098 // Entry already locked, need to throw exception
1099 bind(exception);
1100
1101 if (throw_monitor_exception) {
1102 // Throw exception
1103 NOT_LP64(empty_FPU_stack();)
1104 MacroAssembler::call_VM(noreg,
1105 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1106 throw_illegal_monitor_state_exception));
1107 should_not_reach_here();
1108 } else {
1109 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1110 // Unlock does not block, so don't have to worry about the frame.
1111 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1112
1113 push(state);
1114 mov(robj, rmon); // nop if robj and rmon are the same
1115 unlock_object(robj);
1116 pop(state);
1117
1118 if (install_monitor_exception) {
1119 NOT_LP64(empty_FPU_stack();)
1120 call_VM(noreg, CAST_FROM_FN_PTR(address,
1121 InterpreterRuntime::
1122 new_illegal_monitor_state_exception));
1123 }
1124
1125 jmp(restart);
1126 }
1127
1128 bind(loop);
1129 // check if current entry is used
1130 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
1131 jcc(Assembler::notEqual, exception);
1132
1133 addptr(rmon, entry_size); // otherwise advance to next entry
1134 bind(entry);
1135 cmpptr(rmon, rbx); // check if bottom reached
1136 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1137 }
1138
1139 bind(no_unlock);
1140
1141 // jvmti support
1142 if (notify_jvmdi) {
1143 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1144 } else {
1145 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1146 }
1147
1148 if (StackReservedPages > 0) {
1149 movptr(rbx,
1150 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1151 // testing if reserved zone needs to be re-enabled
1152 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1153 Label no_reserved_zone_enabling;
1154
1155 NOT_LP64(get_thread(rthread);)
1156
1157 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
1158 jcc(Assembler::equal, no_reserved_zone_enabling);
1159
1160 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1161 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1162
1163 call_VM_leaf(
1164 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1165 call_VM(noreg, CAST_FROM_FN_PTR(address,
1166 InterpreterRuntime::throw_delayed_StackOverflowError));
1167 should_not_reach_here();
1168
1169 bind(no_reserved_zone_enabling);
1170 }
1171
1172 // remove activation
1173 // get sender sp
1174 movptr(rbx,
1175 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1176
1177 if (state == atos && InlineTypeReturnedAsFields) {
1178 // Check if we are returning an non-null inline type and load its fields into registers
1179 Label skip;
1180 test_oop_is_not_inline_type(rax, rscratch1, skip);
1181
1182 #ifndef _LP64
1183 super_call_VM_leaf(StubRoutines::load_inline_type_fields_in_regs());
1184 #else
1185 // Load fields from a buffered value with an inline class specific handler
1186 load_klass(rdi, rax, rscratch1);
1187 movptr(rdi, Address(rdi, InstanceKlass::adr_inlineklass_fixed_block_offset()));
1188 movptr(rdi, Address(rdi, InlineKlass::unpack_handler_offset()));
1189 // Unpack handler can be null if inline type is not scalarizable in returns
1190 testptr(rdi, rdi);
1191 jcc(Assembler::zero, skip);
1192 call(rdi);
1193 #endif
1194 #ifdef ASSERT
1195 if (StressInlineTypeReturnedAsFields) {
1196 // TODO 8284443 Enable this for value class returns (L-type descriptor)
1197 Label skip_stress;
1198 movptr(rscratch1, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1199 movptr(rscratch1, Address(rscratch1, Method::const_offset()));
1200 load_unsigned_byte(rscratch1, Address(rscratch1, ConstMethod::result_type_offset()));
1201 cmpl(rscratch1, T_PRIMITIVE_OBJECT);
1202 jcc(Assembler::notEqual, skip_stress);
1203 load_klass(rax, rax, rscratch1);
1204 orptr(rax, 1);
1205 bind(skip_stress);
1206 }
1207 #endif
1208 // call above kills the value in rbx. Reload it.
1209 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1210 bind(skip);
1211 }
1212 leave(); // remove frame anchor
1213 pop(ret_addr); // get return address
1214 mov(rsp, rbx); // set sp to sender sp
1215 pop_cont_fastpath();
1216 }
1217
1218 void InterpreterMacroAssembler::get_method_counters(Register method,
1219 Register mcs, Label& skip) {
1220 Label has_counters;
1221 movptr(mcs, Address(method, Method::method_counters_offset()));
1222 testptr(mcs, mcs);
1223 jcc(Assembler::notZero, has_counters);
1224 call_VM(noreg, CAST_FROM_FN_PTR(address,
1225 InterpreterRuntime::build_method_counters), method);
1226 movptr(mcs, Address(method,Method::method_counters_offset()));
1227 testptr(mcs, mcs);
1228 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1229 bind(has_counters);
1230 }
1231
1232 void InterpreterMacroAssembler::allocate_instance(Register klass, Register new_obj,
1233 Register t1, Register t2,
1234 bool clear_fields, Label& alloc_failed) {
1235 MacroAssembler::allocate_instance(klass, new_obj, t1, t2, clear_fields, alloc_failed);
1236 {
1237 SkipIfEqual skip_if(this, &DTraceAllocProbes, 0, rscratch1);
1238 // Trigger dtrace event for fastpath
1239 push(atos);
1240 call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), new_obj);
1241 pop(atos);
1242 }
1243 }
1244
1245
1246 void InterpreterMacroAssembler::read_inlined_field(Register holder_klass,
1247 Register field_index, Register field_offset,
1248 Register obj) {
1249 Label alloc_failed, empty_value, done;
1250 const Register src = field_offset;
1251 const Register alloc_temp = LP64_ONLY(rscratch1) NOT_LP64(rsi);
1252 const Register dst_temp = LP64_ONLY(rscratch2) NOT_LP64(rdi);
1253 assert_different_registers(obj, holder_klass, field_index, field_offset, dst_temp);
1254
1255 // Grap the inline field klass
1256 push(holder_klass);
1257 const Register field_klass = holder_klass;
1258 get_inline_type_field_klass(holder_klass, field_index, field_klass);
1259
1260 //check for empty value klass
1261 test_klass_is_empty_inline_type(field_klass, dst_temp, empty_value);
1262
1263 // allocate buffer
1264 push(obj); // save holder
1265 allocate_instance(field_klass, obj, alloc_temp, dst_temp, false, alloc_failed);
1266
1267 // Have an oop instance buffer, copy into it
1268 data_for_oop(obj, dst_temp, field_klass);
1269 pop(alloc_temp); // restore holder
1270 lea(src, Address(alloc_temp, field_offset));
1271 // call_VM_leaf, clobbers a few regs, save restore new obj
1272 push(obj);
1273 access_value_copy(IS_DEST_UNINITIALIZED, src, dst_temp, field_klass);
1274 pop(obj);
1275 pop(holder_klass);
1276 jmp(done);
1277
1278 bind(empty_value);
1279 get_empty_inline_type_oop(field_klass, dst_temp, obj);
1280 pop(holder_klass);
1281 jmp(done);
1282
1283 bind(alloc_failed);
1284 pop(obj);
1285 pop(holder_klass);
1286 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::read_inlined_field),
1287 obj, field_index, holder_klass);
1288
1289 bind(done);
1290 }
1291
1292 void InterpreterMacroAssembler::read_flattened_element(Register array, Register index,
1293 Register t1, Register t2,
1294 Register obj) {
1295 assert_different_registers(array, index, t1, t2);
1296 Label alloc_failed, empty_value, done;
1297 const Register array_klass = t2;
1298 const Register elem_klass = t1;
1299 const Register alloc_temp = LP64_ONLY(rscratch1) NOT_LP64(rsi);
1300 const Register dst_temp = LP64_ONLY(rscratch2) NOT_LP64(rdi);
1301
1302 // load in array->klass()->element_klass()
1303 Register tmp_load_klass = LP64_ONLY(rscratch1) NOT_LP64(noreg);
1304 load_klass(array_klass, array, tmp_load_klass);
1305 movptr(elem_klass, Address(array_klass, ArrayKlass::element_klass_offset()));
1306
1307 //check for empty value klass
1308 test_klass_is_empty_inline_type(elem_klass, dst_temp, empty_value);
1309
1310 // calc source into "array_klass" and free up some regs
1311 const Register src = array_klass;
1312 push(index); // preserve index reg in case alloc_failed
1313 data_for_value_array_index(array, array_klass, index, src);
1314
1315 allocate_instance(elem_klass, obj, alloc_temp, dst_temp, false, alloc_failed);
1316 // Have an oop instance buffer, copy into it
1317 store_ptr(0, obj); // preserve obj (overwrite index, no longer needed)
1318 data_for_oop(obj, dst_temp, elem_klass);
1319 access_value_copy(IS_DEST_UNINITIALIZED, src, dst_temp, elem_klass);
1320 pop(obj);
1321 jmp(done);
1322
1323 bind(empty_value);
1324 get_empty_inline_type_oop(elem_klass, dst_temp, obj);
1325 jmp(done);
1326
1327 bind(alloc_failed);
1328 pop(index);
1329 if (array == c_rarg2) {
1330 mov(elem_klass, array);
1331 array = elem_klass;
1332 }
1333 call_VM(obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::value_array_load), array, index);
1334
1335 bind(done);
1336 }
1337
1338
1339 // Lock object
1340 //
1341 // Args:
1342 // rdx, c_rarg1: BasicObjectLock to be used for locking
1343 //
1344 // Kills:
1345 // rax, rbx
1346 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1347 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1348 "The argument is only for looks. It must be c_rarg1");
1349
1350 if (UseHeavyMonitors) {
1351 call_VM(noreg,
1352 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1353 lock_reg);
1354 } else {
1355 Label count_locking, done, slow_case;
1356
1357 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1358 const Register tmp_reg = rbx;
1359 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1360 const Register rklass_decode_tmp = rscratch1;
1361
1362 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1363 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1364 const int mark_offset = lock_offset +
1365 BasicLock::displaced_header_offset_in_bytes();
1366
1367 // Load object pointer into obj_reg
1368 movptr(obj_reg, Address(lock_reg, obj_offset));
1369
1370 if (DiagnoseSyncOnValueBasedClasses != 0) {
1371 load_klass(tmp_reg, obj_reg, rklass_decode_tmp);
1372 movl(tmp_reg, Address(tmp_reg, Klass::access_flags_offset()));
1373 testl(tmp_reg, JVM_ACC_IS_VALUE_BASED_CLASS);
1374 jcc(Assembler::notZero, slow_case);
1375 }
1376
1377 // Load immediate 1 into swap_reg %rax
1378 movl(swap_reg, 1);
1379
1380 // Load (object->mark() | 1) into swap_reg %rax
1381 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1382 if (EnableValhalla) {
1383 // Mask inline_type bit such that we go to the slow path if object is an inline type
1384 andptr(swap_reg, ~((int) markWord::inline_type_bit_in_place));
1385 }
1386
1387 // Save (object->mark() | 1) into BasicLock's displaced header
1388 movptr(Address(lock_reg, mark_offset), swap_reg);
1389
1390 assert(lock_offset == 0,
1391 "displaced header must be first word in BasicObjectLock");
1392
1393 lock();
1394 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1395 jcc(Assembler::zero, count_locking);
1396
1397 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1398
1399 // Fast check for recursive lock.
1400 //
1401 // Can apply the optimization only if this is a stack lock
1402 // allocated in this thread. For efficiency, we can focus on
1403 // recently allocated stack locks (instead of reading the stack
1404 // base and checking whether 'mark' points inside the current
1405 // thread stack):
1406 // 1) (mark & zero_bits) == 0, and
1407 // 2) rsp <= mark < mark + os::pagesize()
1408 //
1409 // Warning: rsp + os::pagesize can overflow the stack base. We must
1410 // neither apply the optimization for an inflated lock allocated
1411 // just above the thread stack (this is why condition 1 matters)
1412 // nor apply the optimization if the stack lock is inside the stack
1413 // of another thread. The latter is avoided even in case of overflow
1414 // because we have guard pages at the end of all stacks. Hence, if
1415 // we go over the stack base and hit the stack of another thread,
1416 // this should not be in a writeable area that could contain a
1417 // stack lock allocated by that thread. As a consequence, a stack
1418 // lock less than page size away from rsp is guaranteed to be
1419 // owned by the current thread.
1420 //
1421 // These 3 tests can be done by evaluating the following
1422 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1423 // assuming both stack pointer and pagesize have their
1424 // least significant bits clear.
1425 // NOTE: the mark is in swap_reg %rax as the result of cmpxchg
1426 subptr(swap_reg, rsp);
1427 andptr(swap_reg, zero_bits - os::vm_page_size());
1428
1429 // Save the test result, for recursive case, the result is zero
1430 movptr(Address(lock_reg, mark_offset), swap_reg);
1431 jcc(Assembler::notZero, slow_case);
1432
1433 bind(count_locking);
1434 inc_held_monitor_count();
1435 jmp(done);
1436
1437 bind(slow_case);
1438
1439 // Call the runtime routine for slow case
1440 call_VM(noreg,
1441 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1442 lock_reg);
1443
1444 bind(done);
1445 }
1446 }
1447
1448
1449 // Unlocks an object. Used in monitorexit bytecode and
1450 // remove_activation. Throws an IllegalMonitorException if object is
1451 // not locked by current thread.
1452 //
1453 // Args:
1454 // rdx, c_rarg1: BasicObjectLock for lock
1455 //
1456 // Kills:
1457 // rax
1458 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1459 // rscratch1 (scratch reg)
1460 // rax, rbx, rcx, rdx
1461 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1462 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1463 "The argument is only for looks. It must be c_rarg1");
1464
1465 if (UseHeavyMonitors) {
1466 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1467 } else {
1468 Label count_locking, done, slow_case;
1469
1470 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1471 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1472 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1473
1474 save_bcp(); // Save in case of exception
1475
1476 // Convert from BasicObjectLock structure to object and BasicLock
1477 // structure Store the BasicLock address into %rax
1478 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1479
1480 // Load oop into obj_reg(%c_rarg3)
1481 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1482
1483 // Free entry
1484 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
1485
1486 // Load the old header from BasicLock structure
1487 movptr(header_reg, Address(swap_reg,
1488 BasicLock::displaced_header_offset_in_bytes()));
1489
1490 // Test for recursion
1491 testptr(header_reg, header_reg);
1492
1493 // zero for recursive case
1494 jcc(Assembler::zero, count_locking);
1495
1496 // Atomic swap back the old header
1497 lock();
1498 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1499
1500 // zero for simple unlock of a stack-lock case
1501 jcc(Assembler::notZero, slow_case);
1502
1503 bind(count_locking);
1504 dec_held_monitor_count();
1505 jmp(done);
1506
1507 bind(slow_case);
1508 // Call the runtime routine for slow case.
1509 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
1510 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1511
1512 bind(done);
1513
1514 restore_bcp();
1515 }
1516 }
1517
1518 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1519 Label& zero_continue) {
1520 assert(ProfileInterpreter, "must be profiling interpreter");
1521 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1522 testptr(mdp, mdp);
1523 jcc(Assembler::zero, zero_continue);
1524 }
1525
1526
1527 // Set the method data pointer for the current bcp.
1528 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1529 assert(ProfileInterpreter, "must be profiling interpreter");
1530 Label set_mdp;
1531 push(rax);
1532 push(rbx);
1533
1534 get_method(rbx);
1535 // Test MDO to avoid the call if it is NULL.
1536 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1537 testptr(rax, rax);
1538 jcc(Assembler::zero, set_mdp);
1539 // rbx: method
1540 // _bcp_register: bcp
1541 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1542 // rax: mdi
1543 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1544 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1545 addptr(rbx, in_bytes(MethodData::data_offset()));
1546 addptr(rax, rbx);
1547 bind(set_mdp);
1548 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1549 pop(rbx);
1550 pop(rax);
1551 }
1552
1553 void InterpreterMacroAssembler::verify_method_data_pointer() {
1554 assert(ProfileInterpreter, "must be profiling interpreter");
1555 #ifdef ASSERT
1556 Label verify_continue;
1557 push(rax);
1558 push(rbx);
1559 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1560 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1561 push(arg3_reg);
1562 push(arg2_reg);
1563 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1564 get_method(rbx);
1565
1566 // If the mdp is valid, it will point to a DataLayout header which is
1567 // consistent with the bcp. The converse is highly probable also.
1568 load_unsigned_short(arg2_reg,
1569 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1570 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1571 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1572 cmpptr(arg2_reg, _bcp_register);
1573 jcc(Assembler::equal, verify_continue);
1574 // rbx: method
1575 // _bcp_register: bcp
1576 // c_rarg3: mdp
1577 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1578 rbx, _bcp_register, arg3_reg);
1579 bind(verify_continue);
1580 pop(arg2_reg);
1581 pop(arg3_reg);
1582 pop(rbx);
1583 pop(rax);
1584 #endif // ASSERT
1585 }
1586
1587
1588 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1589 int constant,
1590 Register value) {
1591 assert(ProfileInterpreter, "must be profiling interpreter");
1592 Address data(mdp_in, constant);
1593 movptr(data, value);
1594 }
1595
1596
1597 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1598 int constant,
1599 bool decrement) {
1600 // Counter address
1601 Address data(mdp_in, constant);
1602
1603 increment_mdp_data_at(data, decrement);
1604 }
1605
1606 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1607 bool decrement) {
1608 assert(ProfileInterpreter, "must be profiling interpreter");
1609 // %%% this does 64bit counters at best it is wasting space
1610 // at worst it is a rare bug when counters overflow
1611
1612 if (decrement) {
1613 // Decrement the register. Set condition codes.
1614 addptr(data, -DataLayout::counter_increment);
1615 // If the decrement causes the counter to overflow, stay negative
1616 Label L;
1617 jcc(Assembler::negative, L);
1618 addptr(data, DataLayout::counter_increment);
1619 bind(L);
1620 } else {
1621 assert(DataLayout::counter_increment == 1,
1622 "flow-free idiom only works with 1");
1623 // Increment the register. Set carry flag.
1624 addptr(data, DataLayout::counter_increment);
1625 // If the increment causes the counter to overflow, pull back by 1.
1626 sbbptr(data, 0);
1627 }
1628 }
1629
1630
1631 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1632 Register reg,
1633 int constant,
1634 bool decrement) {
1635 Address data(mdp_in, reg, Address::times_1, constant);
1636
1637 increment_mdp_data_at(data, decrement);
1638 }
1639
1640 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1641 int flag_byte_constant) {
1642 assert(ProfileInterpreter, "must be profiling interpreter");
1643 int header_offset = in_bytes(DataLayout::flags_offset());
1644 int header_bits = flag_byte_constant;
1645 // Set the flag
1646 orb(Address(mdp_in, header_offset), header_bits);
1647 }
1648
1649
1650
1651 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1652 int offset,
1653 Register value,
1654 Register test_value_out,
1655 Label& not_equal_continue) {
1656 assert(ProfileInterpreter, "must be profiling interpreter");
1657 if (test_value_out == noreg) {
1658 cmpptr(value, Address(mdp_in, offset));
1659 } else {
1660 // Put the test value into a register, so caller can use it:
1661 movptr(test_value_out, Address(mdp_in, offset));
1662 cmpptr(test_value_out, value);
1663 }
1664 jcc(Assembler::notEqual, not_equal_continue);
1665 }
1666
1667
1668 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1669 int offset_of_disp) {
1670 assert(ProfileInterpreter, "must be profiling interpreter");
1671 Address disp_address(mdp_in, offset_of_disp);
1672 addptr(mdp_in, disp_address);
1673 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1674 }
1675
1676
1677 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1678 Register reg,
1679 int offset_of_disp) {
1680 assert(ProfileInterpreter, "must be profiling interpreter");
1681 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1682 addptr(mdp_in, disp_address);
1683 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1684 }
1685
1686
1687 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1688 int constant) {
1689 assert(ProfileInterpreter, "must be profiling interpreter");
1690 addptr(mdp_in, constant);
1691 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1692 }
1693
1694
1695 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1696 assert(ProfileInterpreter, "must be profiling interpreter");
1697 push(return_bci); // save/restore across call_VM
1698 call_VM(noreg,
1699 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1700 return_bci);
1701 pop(return_bci);
1702 }
1703
1704
1705 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1706 Register bumped_count) {
1707 if (ProfileInterpreter) {
1708 Label profile_continue;
1709
1710 // If no method data exists, go to profile_continue.
1711 // Otherwise, assign to mdp
1712 test_method_data_pointer(mdp, profile_continue);
1713
1714 // We are taking a branch. Increment the taken count.
1715 // We inline increment_mdp_data_at to return bumped_count in a register
1716 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1717 Address data(mdp, in_bytes(JumpData::taken_offset()));
1718 movptr(bumped_count, data);
1719 assert(DataLayout::counter_increment == 1,
1720 "flow-free idiom only works with 1");
1721 addptr(bumped_count, DataLayout::counter_increment);
1722 sbbptr(bumped_count, 0);
1723 movptr(data, bumped_count); // Store back out
1724
1725 // The method data pointer needs to be updated to reflect the new target.
1726 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1727 bind(profile_continue);
1728 }
1729 }
1730
1731
1732 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp, bool acmp) {
1733 if (ProfileInterpreter) {
1734 Label profile_continue;
1735
1736 // If no method data exists, go to profile_continue.
1737 test_method_data_pointer(mdp, profile_continue);
1738
1739 // We are taking a branch. Increment the not taken count.
1740 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1741
1742 // The method data pointer needs to be updated to correspond to
1743 // the next bytecode
1744 update_mdp_by_constant(mdp, acmp ? in_bytes(ACmpData::acmp_data_size()): in_bytes(BranchData::branch_data_size()));
1745 bind(profile_continue);
1746 }
1747 }
1748
1749 void InterpreterMacroAssembler::profile_call(Register mdp) {
1750 if (ProfileInterpreter) {
1751 Label profile_continue;
1752
1753 // If no method data exists, go to profile_continue.
1754 test_method_data_pointer(mdp, profile_continue);
1755
1756 // We are making a call. Increment the count.
1757 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1758
1759 // The method data pointer needs to be updated to reflect the new target.
1760 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1761 bind(profile_continue);
1762 }
1763 }
1764
1765
1766 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1767 if (ProfileInterpreter) {
1768 Label profile_continue;
1769
1770 // If no method data exists, go to profile_continue.
1771 test_method_data_pointer(mdp, profile_continue);
1772
1773 // We are making a call. Increment the count.
1774 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1775
1776 // The method data pointer needs to be updated to reflect the new target.
1777 update_mdp_by_constant(mdp,
1778 in_bytes(VirtualCallData::
1779 virtual_call_data_size()));
1780 bind(profile_continue);
1781 }
1782 }
1783
1784
1785 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1786 Register mdp,
1787 Register reg2,
1788 bool receiver_can_be_null) {
1789 if (ProfileInterpreter) {
1790 Label profile_continue;
1791
1792 // If no method data exists, go to profile_continue.
1793 test_method_data_pointer(mdp, profile_continue);
1794
1795 Label skip_receiver_profile;
1796 if (receiver_can_be_null) {
1797 Label not_null;
1798 testptr(receiver, receiver);
1799 jccb(Assembler::notZero, not_null);
1800 // We are making a call. Increment the count for null receiver.
1801 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1802 jmp(skip_receiver_profile);
1803 bind(not_null);
1804 }
1805
1806 // Record the receiver type.
1807 record_klass_in_profile(receiver, mdp, reg2, true);
1808 bind(skip_receiver_profile);
1809
1810 // The method data pointer needs to be updated to reflect the new target.
1811 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1812 bind(profile_continue);
1813 }
1814 }
1815
1816 // This routine creates a state machine for updating the multi-row
1817 // type profile at a virtual call site (or other type-sensitive bytecode).
1818 // The machine visits each row (of receiver/count) until the receiver type
1819 // is found, or until it runs out of rows. At the same time, it remembers
1820 // the location of the first empty row. (An empty row records null for its
1821 // receiver, and can be allocated for a newly-observed receiver type.)
1822 // Because there are two degrees of freedom in the state, a simple linear
1823 // search will not work; it must be a decision tree. Hence this helper
1824 // function is recursive, to generate the required tree structured code.
1825 // It's the interpreter, so we are trading off code space for speed.
1826 // See below for example code.
1827 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1828 Register receiver, Register mdp,
1829 Register reg2, int start_row,
1830 Label& done, bool is_virtual_call) {
1831 if (TypeProfileWidth == 0) {
1832 if (is_virtual_call) {
1833 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1834 }
1835 #if INCLUDE_JVMCI
1836 else if (EnableJVMCI) {
1837 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1838 }
1839 #endif // INCLUDE_JVMCI
1840 } else {
1841 int non_profiled_offset = -1;
1842 if (is_virtual_call) {
1843 non_profiled_offset = in_bytes(CounterData::count_offset());
1844 }
1845 #if INCLUDE_JVMCI
1846 else if (EnableJVMCI) {
1847 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1848 }
1849 #endif // INCLUDE_JVMCI
1850
1851 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1852 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1853 }
1854 }
1855
1856 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1857 Register reg2, int start_row, Label& done, int total_rows,
1858 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1859 int non_profiled_offset) {
1860 int last_row = total_rows - 1;
1861 assert(start_row <= last_row, "must be work left to do");
1862 // Test this row for both the item and for null.
1863 // Take any of three different outcomes:
1864 // 1. found item => increment count and goto done
1865 // 2. found null => keep looking for case 1, maybe allocate this cell
1866 // 3. found something else => keep looking for cases 1 and 2
1867 // Case 3 is handled by a recursive call.
1868 for (int row = start_row; row <= last_row; row++) {
1869 Label next_test;
1870 bool test_for_null_also = (row == start_row);
1871
1872 // See if the item is item[n].
1873 int item_offset = in_bytes(item_offset_fn(row));
1874 test_mdp_data_at(mdp, item_offset, item,
1875 (test_for_null_also ? reg2 : noreg),
1876 next_test);
1877 // (Reg2 now contains the item from the CallData.)
1878
1879 // The item is item[n]. Increment count[n].
1880 int count_offset = in_bytes(item_count_offset_fn(row));
1881 increment_mdp_data_at(mdp, count_offset);
1882 jmp(done);
1883 bind(next_test);
1884
1885 if (test_for_null_also) {
1886 // Failed the equality check on item[n]... Test for null.
1887 testptr(reg2, reg2);
1888 if (start_row == last_row) {
1889 // The only thing left to do is handle the null case.
1890 if (non_profiled_offset >= 0) {
1891 Label found_null;
1892 jccb(Assembler::zero, found_null);
1893 // Item did not match any saved item and there is no empty row for it.
1894 // Increment total counter to indicate polymorphic case.
1895 increment_mdp_data_at(mdp, non_profiled_offset);
1896 jmp(done);
1897 bind(found_null);
1898 } else {
1899 jcc(Assembler::notZero, done);
1900 }
1901 break;
1902 }
1903 Label found_null;
1904 // Since null is rare, make it be the branch-taken case.
1905 jcc(Assembler::zero, found_null);
1906
1907 // Put all the "Case 3" tests here.
1908 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1909 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1910
1911 // Found a null. Keep searching for a matching item,
1912 // but remember that this is an empty (unused) slot.
1913 bind(found_null);
1914 }
1915 }
1916
1917 // In the fall-through case, we found no matching item, but we
1918 // observed the item[start_row] is NULL.
1919
1920 // Fill in the item field and increment the count.
1921 int item_offset = in_bytes(item_offset_fn(start_row));
1922 set_mdp_data_at(mdp, item_offset, item);
1923 int count_offset = in_bytes(item_count_offset_fn(start_row));
1924 movl(reg2, DataLayout::counter_increment);
1925 set_mdp_data_at(mdp, count_offset, reg2);
1926 if (start_row > 0) {
1927 jmp(done);
1928 }
1929 }
1930
1931 // Example state machine code for three profile rows:
1932 // // main copy of decision tree, rooted at row[1]
1933 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1934 // if (row[0].rec != NULL) {
1935 // // inner copy of decision tree, rooted at row[1]
1936 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1937 // if (row[1].rec != NULL) {
1938 // // degenerate decision tree, rooted at row[2]
1939 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1940 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1941 // row[2].init(rec); goto done;
1942 // } else {
1943 // // remember row[1] is empty
1944 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1945 // row[1].init(rec); goto done;
1946 // }
1947 // } else {
1948 // // remember row[0] is empty
1949 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1950 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1951 // row[0].init(rec); goto done;
1952 // }
1953 // done:
1954
1955 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1956 Register mdp, Register reg2,
1957 bool is_virtual_call) {
1958 assert(ProfileInterpreter, "must be profiling");
1959 Label done;
1960
1961 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1962
1963 bind (done);
1964 }
1965
1966 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1967 Register mdp) {
1968 if (ProfileInterpreter) {
1969 Label profile_continue;
1970 uint row;
1971
1972 // If no method data exists, go to profile_continue.
1973 test_method_data_pointer(mdp, profile_continue);
1974
1975 // Update the total ret count.
1976 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1977
1978 for (row = 0; row < RetData::row_limit(); row++) {
1979 Label next_test;
1980
1981 // See if return_bci is equal to bci[n]:
1982 test_mdp_data_at(mdp,
1983 in_bytes(RetData::bci_offset(row)),
1984 return_bci, noreg,
1985 next_test);
1986
1987 // return_bci is equal to bci[n]. Increment the count.
1988 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1989
1990 // The method data pointer needs to be updated to reflect the new target.
1991 update_mdp_by_offset(mdp,
1992 in_bytes(RetData::bci_displacement_offset(row)));
1993 jmp(profile_continue);
1994 bind(next_test);
1995 }
1996
1997 update_mdp_for_ret(return_bci);
1998
1999 bind(profile_continue);
2000 }
2001 }
2002
2003
2004 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
2005 if (ProfileInterpreter) {
2006 Label profile_continue;
2007
2008 // If no method data exists, go to profile_continue.
2009 test_method_data_pointer(mdp, profile_continue);
2010
2011 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
2012
2013 // The method data pointer needs to be updated.
2014 int mdp_delta = in_bytes(BitData::bit_data_size());
2015 if (TypeProfileCasts) {
2016 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
2017 }
2018 update_mdp_by_constant(mdp, mdp_delta);
2019
2020 bind(profile_continue);
2021 }
2022 }
2023
2024
2025 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
2026 if (ProfileInterpreter && TypeProfileCasts) {
2027 Label profile_continue;
2028
2029 // If no method data exists, go to profile_continue.
2030 test_method_data_pointer(mdp, profile_continue);
2031
2032 int count_offset = in_bytes(CounterData::count_offset());
2033 // Back up the address, since we have already bumped the mdp.
2034 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
2035
2036 // *Decrement* the counter. We expect to see zero or small negatives.
2037 increment_mdp_data_at(mdp, count_offset, true);
2038
2039 bind (profile_continue);
2040 }
2041 }
2042
2043
2044 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
2045 if (ProfileInterpreter) {
2046 Label profile_continue;
2047
2048 // If no method data exists, go to profile_continue.
2049 test_method_data_pointer(mdp, profile_continue);
2050
2051 // The method data pointer needs to be updated.
2052 int mdp_delta = in_bytes(BitData::bit_data_size());
2053 if (TypeProfileCasts) {
2054 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
2055
2056 // Record the object type.
2057 record_klass_in_profile(klass, mdp, reg2, false);
2058 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
2059 NOT_LP64(restore_locals();) // Restore EDI
2060 }
2061 update_mdp_by_constant(mdp, mdp_delta);
2062
2063 bind(profile_continue);
2064 }
2065 }
2066
2067
2068 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
2069 if (ProfileInterpreter) {
2070 Label profile_continue;
2071
2072 // If no method data exists, go to profile_continue.
2073 test_method_data_pointer(mdp, profile_continue);
2074
2075 // Update the default case count
2076 increment_mdp_data_at(mdp,
2077 in_bytes(MultiBranchData::default_count_offset()));
2078
2079 // The method data pointer needs to be updated.
2080 update_mdp_by_offset(mdp,
2081 in_bytes(MultiBranchData::
2082 default_displacement_offset()));
2083
2084 bind(profile_continue);
2085 }
2086 }
2087
2088
2089 void InterpreterMacroAssembler::profile_switch_case(Register index,
2090 Register mdp,
2091 Register reg2) {
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 // Build the base (index * per_case_size_in_bytes()) +
2099 // case_array_offset_in_bytes()
2100 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
2101 imulptr(index, reg2); // XXX l ?
2102 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
2103
2104 // Update the case count
2105 increment_mdp_data_at(mdp,
2106 index,
2107 in_bytes(MultiBranchData::relative_count_offset()));
2108
2109 // The method data pointer needs to be updated.
2110 update_mdp_by_offset(mdp,
2111 index,
2112 in_bytes(MultiBranchData::
2113 relative_displacement_offset()));
2114
2115 bind(profile_continue);
2116 }
2117 }
2118
2119 void InterpreterMacroAssembler::profile_array(Register mdp,
2120 Register array,
2121 Register tmp) {
2122 if (ProfileInterpreter) {
2123 Label profile_continue;
2124
2125 // If no method data exists, go to profile_continue.
2126 test_method_data_pointer(mdp, profile_continue);
2127
2128 mov(tmp, array);
2129 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadStoreData::array_offset())));
2130
2131 Label not_flat;
2132 test_non_flattened_array_oop(array, tmp, not_flat);
2133
2134 set_mdp_flag_at(mdp, ArrayLoadStoreData::flat_array_byte_constant());
2135
2136 bind(not_flat);
2137
2138 Label not_null_free;
2139 test_non_null_free_array_oop(array, tmp, not_null_free);
2140
2141 set_mdp_flag_at(mdp, ArrayLoadStoreData::null_free_array_byte_constant());
2142
2143 bind(not_null_free);
2144
2145 bind(profile_continue);
2146 }
2147 }
2148
2149 void InterpreterMacroAssembler::profile_element(Register mdp,
2150 Register element,
2151 Register tmp) {
2152 if (ProfileInterpreter) {
2153 Label profile_continue;
2154
2155 // If no method data exists, go to profile_continue.
2156 test_method_data_pointer(mdp, profile_continue);
2157
2158 mov(tmp, element);
2159 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadStoreData::element_offset())));
2160
2161 // The method data pointer needs to be updated.
2162 update_mdp_by_constant(mdp, in_bytes(ArrayLoadStoreData::array_load_store_data_size()));
2163
2164 bind(profile_continue);
2165 }
2166 }
2167
2168 void InterpreterMacroAssembler::profile_acmp(Register mdp,
2169 Register left,
2170 Register right,
2171 Register tmp) {
2172 if (ProfileInterpreter) {
2173 Label profile_continue;
2174
2175 // If no method data exists, go to profile_continue.
2176 test_method_data_pointer(mdp, profile_continue);
2177
2178 mov(tmp, left);
2179 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::left_offset())));
2180
2181 Label left_not_inline_type;
2182 test_oop_is_not_inline_type(left, tmp, left_not_inline_type);
2183 set_mdp_flag_at(mdp, ACmpData::left_inline_type_byte_constant());
2184 bind(left_not_inline_type);
2185
2186 mov(tmp, right);
2187 profile_obj_type(tmp, Address(mdp, in_bytes(ACmpData::right_offset())));
2188
2189 Label right_not_inline_type;
2190 test_oop_is_not_inline_type(right, tmp, right_not_inline_type);
2191 set_mdp_flag_at(mdp, ACmpData::right_inline_type_byte_constant());
2192 bind(right_not_inline_type);
2193
2194 bind(profile_continue);
2195 }
2196 }
2197
2198
2199 void InterpreterMacroAssembler::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
2200 if (state == atos) {
2201 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
2202 }
2203 }
2204
2205 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
2206 #ifndef _LP64
2207 if ((state == ftos && UseSSE < 1) ||
2208 (state == dtos && UseSSE < 2)) {
2209 MacroAssembler::verify_FPU(stack_depth);
2210 }
2211 #endif
2212 }
2213
2214 // Jump if ((*counter_addr += increment) & mask) == 0
2215 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
2216 Register scratch, Label* where) {
2217 // This update is actually not atomic and can lose a number of updates
2218 // under heavy contention, but the alternative of using the (contended)
2219 // atomic update here penalizes profiling paths too much.
2220 movl(scratch, counter_addr);
2221 incrementl(scratch, InvocationCounter::count_increment);
2222 movl(counter_addr, scratch);
2223 andl(scratch, mask);
2224 if (where != NULL) {
2225 jcc(Assembler::zero, *where);
2226 }
2227 }
2228
2229 void InterpreterMacroAssembler::notify_method_entry() {
2230 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2231 // track stack depth. If it is possible to enter interp_only_mode we add
2232 // the code to check if the event should be sent.
2233 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2234 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2235 if (JvmtiExport::can_post_interpreter_events()) {
2236 Label L;
2237 NOT_LP64(get_thread(rthread);)
2238 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2239 testl(rdx, rdx);
2240 jcc(Assembler::zero, L);
2241 call_VM(noreg, CAST_FROM_FN_PTR(address,
2242 InterpreterRuntime::post_method_entry));
2243 bind(L);
2244 }
2245
2246 {
2247 SkipIfEqual skip(this, &DTraceMethodProbes, false, rscratch1);
2248 NOT_LP64(get_thread(rthread);)
2249 get_method(rarg);
2250 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2251 rthread, rarg);
2252 }
2253
2254 // RedefineClasses() tracing support for obsolete method entry
2255 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2256 NOT_LP64(get_thread(rthread);)
2257 get_method(rarg);
2258 call_VM_leaf(
2259 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2260 rthread, rarg);
2261 }
2262 }
2263
2264
2265 void InterpreterMacroAssembler::notify_method_exit(
2266 TosState state, NotifyMethodExitMode mode) {
2267 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2268 // track stack depth. If it is possible to enter interp_only_mode we add
2269 // the code to check if the event should be sent.
2270 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2271 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2272 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2273 Label L;
2274 // Note: frame::interpreter_frame_result has a dependency on how the
2275 // method result is saved across the call to post_method_exit. If this
2276 // is changed then the interpreter_frame_result implementation will
2277 // need to be updated too.
2278
2279 // template interpreter will leave the result on the top of the stack.
2280 push(state);
2281 NOT_LP64(get_thread(rthread);)
2282 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2283 testl(rdx, rdx);
2284 jcc(Assembler::zero, L);
2285 call_VM(noreg,
2286 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2287 bind(L);
2288 pop(state);
2289 }
2290
2291 {
2292 SkipIfEqual skip(this, &DTraceMethodProbes, false, rscratch1);
2293 push(state);
2294 NOT_LP64(get_thread(rthread);)
2295 get_method(rarg);
2296 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2297 rthread, rarg);
2298 pop(state);
2299 }
2300 }