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