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 "memory/vtBuffer.hpp"
31 #include "oops/arrayOop.hpp"
32 #include "oops/markOop.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/method.hpp"
35 #include "oops/valueKlass.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "prims/jvmtiThreadState.hpp"
38 #include "runtime/basicLock.hpp"
39 #include "runtime/biasedLocking.hpp"
40 #include "runtime/frame.inline.hpp"
41 #include "runtime/safepointMechanism.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/thread.inline.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 verify_oop(obj);
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);
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(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
155 shll(tmp, exact_log2(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, done;
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 // begining 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()), vmIntrinsics::_compiledLambdaForm);
194 jcc(Assembler::notEqual, profile_continue);
195
196 bind(do_profile);
197 }
198
199 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::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, done;
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), (int32_t)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), (int32_t)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, (int32_t)NULL_WORD);
353 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, (int) ilgl);
367 movl(val_addr, (int32_t) 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 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, (int32_t) 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(cache != tmp, "must use different register");
493 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
494 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
495 // convert from field index to ConstantPoolCacheEntry index
496 // and from word offset to byte offset
497 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
498 shll(tmp, 2 + LogBytesPerWord);
499 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
500 // skip past the header
501 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
502 addptr(cache, tmp); // construct pointer to cache entry
503 }
504
505 // Load object from cpool->resolved_references(index)
506 void InterpreterMacroAssembler::load_resolved_reference_at_index(
507 Register result, Register index, Register tmp) {
508 assert_different_registers(result, index);
509
510 get_constant_pool(result);
511 // load pointer for resolved_references[] objArray
512 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
513 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
514 resolve_oop_handle(result, tmp);
515 load_heap_oop(result, Address(result, index,
516 UseCompressedOops ? Address::times_4 : Address::times_ptr,
517 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
518 }
519
520 // load cpool->resolved_klass_at(index)
521 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool,
522 Register index, Register klass) {
523 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
524 Register resolved_klasses = cpool;
525 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
526 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
527 }
528
529 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
530 // subtype of super_klass.
531 //
532 // Args:
533 // rax: superklass
534 // Rsub_klass: subklass
535 //
536 // Kills:
537 // rcx, rdi
538 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
539 Label& ok_is_subtype) {
540 assert(Rsub_klass != rax, "rax holds superklass");
541 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
542 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
543 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
544 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
545
546 // Profile the not-null value's klass.
547 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
548
549 // Do the check.
550 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
551
552 // Profile the failure of the check.
553 profile_typecheck_failed(rcx); // blows rcx
554 }
555
556
557 #ifndef _LP64
558 void InterpreterMacroAssembler::f2ieee() {
559 if (IEEEPrecision) {
560 fstp_s(Address(rsp, 0));
561 fld_s(Address(rsp, 0));
562 }
563 }
564
565
566 void InterpreterMacroAssembler::d2ieee() {
567 if (IEEEPrecision) {
568 fstp_d(Address(rsp, 0));
569 fld_d(Address(rsp, 0));
570 }
571 }
572 #endif // _LP64
573
574 // Java Expression Stack
575
576 void InterpreterMacroAssembler::pop_ptr(Register r) {
577 pop(r);
578 }
579
580 void InterpreterMacroAssembler::push_ptr(Register r) {
581 push(r);
582 }
583
584 void InterpreterMacroAssembler::push_i(Register r) {
585 push(r);
586 }
587
588 void InterpreterMacroAssembler::push_f(XMMRegister r) {
589 subptr(rsp, wordSize);
590 movflt(Address(rsp, 0), r);
591 }
592
593 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
594 movflt(r, Address(rsp, 0));
595 addptr(rsp, wordSize);
596 }
597
598 void InterpreterMacroAssembler::push_d(XMMRegister r) {
599 subptr(rsp, 2 * wordSize);
600 movdbl(Address(rsp, 0), r);
601 }
602
603 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
604 movdbl(r, Address(rsp, 0));
605 addptr(rsp, 2 * Interpreter::stackElementSize);
606 }
607
608 #ifdef _LP64
609 void InterpreterMacroAssembler::pop_i(Register r) {
610 // XXX can't use pop currently, upper half non clean
611 movl(r, Address(rsp, 0));
612 addptr(rsp, wordSize);
613 }
614
615 void InterpreterMacroAssembler::pop_l(Register r) {
616 movq(r, Address(rsp, 0));
617 addptr(rsp, 2 * Interpreter::stackElementSize);
618 }
619
620 void InterpreterMacroAssembler::push_l(Register r) {
621 subptr(rsp, 2 * wordSize);
622 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
623 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
624 }
625
626 void InterpreterMacroAssembler::pop(TosState state) {
627 switch (state) {
628 case atos: pop_ptr(); break;
629 case btos:
630 case ztos:
631 case ctos:
632 case stos:
633 case itos: pop_i(); break;
634 case ltos: pop_l(); break;
635 case ftos: pop_f(xmm0); break;
636 case dtos: pop_d(xmm0); break;
637 case vtos: /* nothing to do */ break;
638 default: ShouldNotReachHere();
639 }
640 verify_oop(rax, state);
641 }
642
643 void InterpreterMacroAssembler::push(TosState state) {
644 verify_oop(rax, state);
645 switch (state) {
646 case atos: push_ptr(); break;
647 case btos:
648 case ztos:
649 case ctos:
650 case stos:
651 case itos: push_i(); break;
652 case ltos: push_l(); break;
653 case ftos: push_f(xmm0); break;
654 case dtos: push_d(xmm0); break;
655 case vtos: /* nothing to do */ break;
656 default : ShouldNotReachHere();
657 }
658 }
659 #else
660 void InterpreterMacroAssembler::pop_i(Register r) {
661 pop(r);
662 }
663
664 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
665 pop(lo);
666 pop(hi);
667 }
668
669 void InterpreterMacroAssembler::pop_f() {
670 fld_s(Address(rsp, 0));
671 addptr(rsp, 1 * wordSize);
672 }
673
674 void InterpreterMacroAssembler::pop_d() {
675 fld_d(Address(rsp, 0));
676 addptr(rsp, 2 * wordSize);
677 }
678
679
680 void InterpreterMacroAssembler::pop(TosState state) {
681 switch (state) {
682 case atos: pop_ptr(rax); break;
683 case btos: // fall through
684 case ztos: // fall through
685 case ctos: // fall through
686 case stos: // fall through
687 case itos: pop_i(rax); break;
688 case ltos: pop_l(rax, rdx); break;
689 case ftos:
690 if (UseSSE >= 1) {
691 pop_f(xmm0);
692 } else {
693 pop_f();
694 }
695 break;
696 case dtos:
697 if (UseSSE >= 2) {
698 pop_d(xmm0);
699 } else {
700 pop_d();
701 }
702 break;
703 case vtos: /* nothing to do */ break;
704 default : ShouldNotReachHere();
705 }
706 verify_oop(rax, state);
707 }
708
709
710 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
711 push(hi);
712 push(lo);
713 }
714
715 void InterpreterMacroAssembler::push_f() {
716 // Do not schedule for no AGI! Never write beyond rsp!
717 subptr(rsp, 1 * wordSize);
718 fstp_s(Address(rsp, 0));
719 }
720
721 void InterpreterMacroAssembler::push_d() {
722 // Do not schedule for no AGI! Never write beyond rsp!
723 subptr(rsp, 2 * wordSize);
724 fstp_d(Address(rsp, 0));
725 }
726
727
728 void InterpreterMacroAssembler::push(TosState state) {
729 verify_oop(rax, state);
730 switch (state) {
731 case atos: push_ptr(rax); break;
732 case btos: // fall through
733 case ztos: // fall through
734 case ctos: // fall through
735 case stos: // fall through
736 case itos: push_i(rax); break;
737 case ltos: push_l(rax, rdx); break;
738 case ftos:
739 if (UseSSE >= 1) {
740 push_f(xmm0);
741 } else {
742 push_f();
743 }
744 break;
745 case dtos:
746 if (UseSSE >= 2) {
747 push_d(xmm0);
748 } else {
749 push_d();
750 }
751 break;
752 case vtos: /* nothing to do */ break;
753 default : ShouldNotReachHere();
754 }
755 }
756 #endif // _LP64
757
758
759 // Helpers for swap and dup
760 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
761 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
762 }
763
764 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
765 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
766 }
767
768
769 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
770 // set sender sp
771 lea(_bcp_register, Address(rsp, wordSize));
772 // record last_sp
773 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
774 }
775
776
777 // Jump to from_interpreted entry of a call unless single stepping is possible
778 // in this thread in which case we must call the i2i entry
779 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
780 prepare_to_jump_from_interpreted();
781
782 if (JvmtiExport::can_post_interpreter_events()) {
783 Label run_compiled_code;
784 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
785 // compiled code in threads for which the event is enabled. Check here for
786 // interp_only_mode if these events CAN be enabled.
787 // interp_only is an int, on little endian it is sufficient to test the byte only
788 // Is a cmpl faster?
789 LP64_ONLY(temp = r15_thread;)
790 NOT_LP64(get_thread(temp);)
791 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
792 jccb(Assembler::zero, run_compiled_code);
793 jmp(Address(method, Method::interpreter_entry_offset()));
794 bind(run_compiled_code);
795 }
796
797 jmp(Address(method, Method::from_interpreted_offset()));
798 }
799
800 // The following two routines provide a hook so that an implementation
801 // can schedule the dispatch in two parts. x86 does not do this.
802 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
803 // Nothing x86 specific to be done here
804 }
805
806 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
807 dispatch_next(state, step);
808 }
809
810 void InterpreterMacroAssembler::dispatch_base(TosState state,
811 address* table,
812 bool verifyoop,
813 bool generate_poll) {
814 verify_FPU(1, state);
815 if (VerifyActivationFrameSize) {
816 Label L;
817 mov(rcx, rbp);
818 subptr(rcx, rsp);
819 int32_t min_frame_size =
820 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
821 wordSize;
822 cmpptr(rcx, (int32_t)min_frame_size);
823 jcc(Assembler::greaterEqual, L);
824 stop("broken stack frame");
825 bind(L);
826 }
827 if (verifyoop) {
828 verify_oop(rax, state);
829 }
830
831 address* const safepoint_table = Interpreter::safept_table(state);
832 #ifdef _LP64
833 Label no_safepoint, dispatch;
834 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
835 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
836 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
837
838 jccb(Assembler::zero, no_safepoint);
839 lea(rscratch1, ExternalAddress((address)safepoint_table));
840 jmpb(dispatch);
841 }
842
843 bind(no_safepoint);
844 lea(rscratch1, ExternalAddress((address)table));
845 bind(dispatch);
846 jmp(Address(rscratch1, rbx, Address::times_8));
847
848 #else
849 Address index(noreg, rbx, Address::times_ptr);
850 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
851 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
852 Label no_safepoint;
853 const Register thread = rcx;
854 get_thread(thread);
855 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
856
857 jccb(Assembler::zero, no_safepoint);
858 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
859 jump(dispatch_addr);
860 bind(no_safepoint);
861 }
862
863 {
864 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
865 jump(dispatch_addr);
866 }
867 #endif // _LP64
868 }
869
870 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
871 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
872 }
873
874 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
875 dispatch_base(state, Interpreter::normal_table(state));
876 }
877
878 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
879 dispatch_base(state, Interpreter::normal_table(state), false);
880 }
881
882
883 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
884 // load next bytecode (load before advancing _bcp_register to prevent AGI)
885 load_unsigned_byte(rbx, Address(_bcp_register, step));
886 // advance _bcp_register
887 increment(_bcp_register, step);
888 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
889 }
890
891 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
892 // load current bytecode
893 load_unsigned_byte(rbx, Address(_bcp_register, 0));
894 dispatch_base(state, table);
895 }
896
897 void InterpreterMacroAssembler::narrow(Register result) {
898
899 // Get method->_constMethod->_result_type
900 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
901 movptr(rcx, Address(rcx, Method::const_offset()));
902 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
903
904 Label done, notBool, notByte, notChar;
905
906 // common case first
907 cmpl(rcx, T_INT);
908 jcc(Assembler::equal, done);
909
910 // mask integer result to narrower return type.
911 cmpl(rcx, T_BOOLEAN);
912 jcc(Assembler::notEqual, notBool);
913 andl(result, 0x1);
914 jmp(done);
915
916 bind(notBool);
917 cmpl(rcx, T_BYTE);
918 jcc(Assembler::notEqual, notByte);
919 LP64_ONLY(movsbl(result, result);)
920 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
921 NOT_LP64(sarl(result, 24);) // and sign-extend byte
922 jmp(done);
923
924 bind(notByte);
925 cmpl(rcx, T_CHAR);
926 jcc(Assembler::notEqual, notChar);
927 LP64_ONLY(movzwl(result, result);)
928 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
929 jmp(done);
930
931 bind(notChar);
932 // cmpl(rcx, T_SHORT); // all that's left
933 // jcc(Assembler::notEqual, done);
934 LP64_ONLY(movswl(result, result);)
935 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
936 NOT_LP64(sarl(result, 16);) // and sign-extend short
937
938 // Nothing to do for T_INT
939 bind(done);
940 }
941
942 // remove activation
943 //
944 // Unlock the receiver if this is a synchronized method.
945 // Unlock any Java monitors from syncronized blocks.
946 // Remove the activation from the stack.
947 //
948 // If there are locked Java monitors
949 // If throw_monitor_exception
950 // throws IllegalMonitorStateException
951 // Else if install_monitor_exception
952 // installs IllegalMonitorStateException
953 // Else
954 // no error processing
955 void InterpreterMacroAssembler::remove_activation(
956 TosState state,
957 Register ret_addr,
958 bool throw_monitor_exception,
959 bool install_monitor_exception,
960 bool notify_jvmdi,
961 bool load_values) {
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 if (StackReservedPages > 0) {
1104 movptr(rbx,
1105 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1106 // testing if reserved zone needs to be re-enabled
1107 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1108 Label no_reserved_zone_enabling;
1109
1110 NOT_LP64(get_thread(rthread);)
1111
1112 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1113 jcc(Assembler::equal, no_reserved_zone_enabling);
1114
1115 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1116 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1117
1118 call_VM_leaf(
1119 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1120 call_VM(noreg, CAST_FROM_FN_PTR(address,
1121 InterpreterRuntime::throw_delayed_StackOverflowError));
1122 should_not_reach_here();
1123
1124 bind(no_reserved_zone_enabling);
1125 }
1126
1127 if (ValueTypesBufferMaxMemory > 0) {
1128 // Code below is taking care of recycling TLVB memory, no safepoint should
1129 // occur between this point and the end of the remove_activation() method
1130 Label vtbuffer_slow, vtbuffer_done, no_buffered_value_returned;
1131 const Register thread1 = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1132 const uintptr_t chunk_mask = VTBufferChunk::chunk_mask();
1133 NOT_LP64(get_thread(thread1));
1134 cmpptr(Address(thread1, JavaThread::return_buffered_value_offset()), (intptr_t)NULL_WORD);
1135 jcc(Assembler::equal, no_buffered_value_returned);
1136 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1137 call_VM_leaf(CAST_FROM_FN_PTR(address,
1138 InterpreterRuntime::return_value_step2), rax, rbx);
1139 NOT_LP64(get_thread(thread1));
1140 get_vm_result(rax, thread1);
1141 jmp(vtbuffer_done);
1142 bind(no_buffered_value_returned);
1143 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1144 NOT_LP64(get_thread(thread1));
1145 movptr(rcx, Address(thread1, JavaThread::vt_alloc_ptr_offset()));
1146 cmpptr(rbx, rcx);
1147 jcc(Assembler::equal, vtbuffer_done);
1148 andptr(rbx, chunk_mask);
1149 andptr(rcx, chunk_mask);
1150 cmpptr(rbx, rcx);
1151 jcc(Assembler::notEqual, vtbuffer_slow);
1152 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1153 movptr(Address(thread1, JavaThread::vt_alloc_ptr_offset()), rbx);
1154 jmp(vtbuffer_done);
1155 bind(vtbuffer_slow);
1156 push(state);
1157 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1158 call_VM_leaf(CAST_FROM_FN_PTR(address,
1159 InterpreterRuntime::recycle_vtbuffer), rbx);
1160 pop(state);
1161 bind(vtbuffer_done);
1162 }
1163
1164 // remove activation
1165 // get sender sp
1166 movptr(rbx,
1167 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1168
1169 if (load_values) {
1170 // We are returning a value type, load its fields into registers
1171 #ifndef _LP64
1172 super_call_VM_leaf(StubRoutines::load_value_type_fields_in_regs());
1173 #else
1174 load_klass(rdi, rax);
1175 movptr(rdi, Address(rdi, ValueKlass::unpack_handler_offset()));
1176
1177 Label skip;
1178 testptr(rdi, rdi);
1179 jcc(Assembler::equal, skip);
1180
1181 // Load fields from a buffered value with a value class specific
1182 // handler
1183 call(rdi);
1184
1185 bind(skip);
1186 #endif
1187 // call above kills the value in rbx. Reload it.
1188 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1189 }
1190 leave(); // remove frame anchor
1191 pop(ret_addr); // get return address
1192 mov(rsp, rbx); // set sp to sender sp
1193 }
1194
1195 void InterpreterMacroAssembler::get_method_counters(Register method,
1196 Register mcs, Label& skip) {
1197 Label has_counters;
1198 movptr(mcs, Address(method, Method::method_counters_offset()));
1199 testptr(mcs, mcs);
1200 jcc(Assembler::notZero, has_counters);
1201 call_VM(noreg, CAST_FROM_FN_PTR(address,
1202 InterpreterRuntime::build_method_counters), method);
1203 movptr(mcs, Address(method,Method::method_counters_offset()));
1204 testptr(mcs, mcs);
1205 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1206 bind(has_counters);
1207 }
1208
1209
1210 // Lock object
1211 //
1212 // Args:
1213 // rdx, c_rarg1: BasicObjectLock to be used for locking
1214 //
1215 // Kills:
1216 // rax, rbx
1217 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1218 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1219 "The argument is only for looks. It must be c_rarg1");
1220
1221 if (UseHeavyMonitors) {
1222 call_VM(noreg,
1223 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1224 lock_reg);
1225 } else {
1226 Label done;
1227
1228 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1229 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1230 // problematic case where tmp_reg = no_reg.
1231 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1232
1233 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1234 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1235 const int mark_offset = lock_offset +
1236 BasicLock::displaced_header_offset_in_bytes();
1237
1238 Label slow_case;
1239
1240 // Load object pointer into obj_reg
1241 movptr(obj_reg, Address(lock_reg, obj_offset));
1242
1243 if (UseBiasedLocking) {
1244 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1245 }
1246
1247 // Load immediate 1 into swap_reg %rax
1248 movl(swap_reg, (int32_t)1);
1249
1250 // Load (object->mark() | 1) into swap_reg %rax
1251 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1252 if (EnableValhalla && !UseBiasedLocking) {
1253 // For slow path is_always_locked, using biased, which is never natural for !UseBiasLocking
1254 andptr(swap_reg, ~markOopDesc::biased_lock_bit_in_place);
1255 }
1256
1257 // Save (object->mark() | 1) into BasicLock's displaced header
1258 movptr(Address(lock_reg, mark_offset), swap_reg);
1259
1260 assert(lock_offset == 0,
1261 "displaced header must be first word in BasicObjectLock");
1262
1263 if (os::is_MP()) lock();
1264 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1265 if (PrintBiasedLockingStatistics) {
1266 cond_inc32(Assembler::zero,
1267 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1268 }
1269 jcc(Assembler::zero, done);
1270
1271 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1272
1273 // Test if the oopMark is an obvious stack pointer, i.e.,
1274 // 1) (mark & zero_bits) == 0, and
1275 // 2) rsp <= mark < mark + os::pagesize()
1276 //
1277 // These 3 tests can be done by evaluating the following
1278 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1279 // assuming both stack pointer and pagesize have their
1280 // least significant bits clear.
1281 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1282 subptr(swap_reg, rsp);
1283 andptr(swap_reg, zero_bits - os::vm_page_size());
1284
1285 // Save the test result, for recursive case, the result is zero
1286 movptr(Address(lock_reg, mark_offset), swap_reg);
1287
1288 if (PrintBiasedLockingStatistics) {
1289 cond_inc32(Assembler::zero,
1290 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1291 }
1292 jcc(Assembler::zero, done);
1293
1294 bind(slow_case);
1295
1296 // Call the runtime routine for slow case
1297 call_VM(noreg,
1298 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1299 lock_reg);
1300
1301 bind(done);
1302 }
1303 }
1304
1305
1306 // Unlocks an object. Used in monitorexit bytecode and
1307 // remove_activation. Throws an IllegalMonitorException if object is
1308 // not locked by current thread.
1309 //
1310 // Args:
1311 // rdx, c_rarg1: BasicObjectLock for lock
1312 //
1313 // Kills:
1314 // rax
1315 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1316 // rscratch1 (scratch reg)
1317 // rax, rbx, rcx, rdx
1318 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1319 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1320 "The argument is only for looks. It must be c_rarg1");
1321
1322 if (UseHeavyMonitors) {
1323 call_VM(noreg,
1324 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1325 lock_reg);
1326 } else {
1327 Label done;
1328
1329 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1330 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1331 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1332
1333 save_bcp(); // Save in case of exception
1334
1335 // Convert from BasicObjectLock structure to object and BasicLock
1336 // structure Store the BasicLock address into %rax
1337 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1338
1339 // Load oop into obj_reg(%c_rarg3)
1340 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1341
1342 // Free entry
1343 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1344
1345 if (UseBiasedLocking) {
1346 biased_locking_exit(obj_reg, header_reg, done);
1347 }
1348
1349 // Load the old header from BasicLock structure
1350 movptr(header_reg, Address(swap_reg,
1351 BasicLock::displaced_header_offset_in_bytes()));
1352
1353 // Test for recursion
1354 testptr(header_reg, header_reg);
1355
1356 // zero for recursive case
1357 jcc(Assembler::zero, done);
1358
1359 // Atomic swap back the old header
1360 if (os::is_MP()) lock();
1361 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1362
1363 // zero for simple unlock of a stack-lock case
1364 jcc(Assembler::zero, done);
1365
1366 // Call the runtime routine for slow case.
1367 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1368 obj_reg); // restore obj
1369 call_VM(noreg,
1370 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1371 lock_reg);
1372
1373 bind(done);
1374
1375 restore_bcp();
1376 }
1377 }
1378
1379 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1380 Label& zero_continue) {
1381 assert(ProfileInterpreter, "must be profiling interpreter");
1382 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1383 testptr(mdp, mdp);
1384 jcc(Assembler::zero, zero_continue);
1385 }
1386
1387
1388 // Set the method data pointer for the current bcp.
1389 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1390 assert(ProfileInterpreter, "must be profiling interpreter");
1391 Label set_mdp;
1392 push(rax);
1393 push(rbx);
1394
1395 get_method(rbx);
1396 // Test MDO to avoid the call if it is NULL.
1397 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1398 testptr(rax, rax);
1399 jcc(Assembler::zero, set_mdp);
1400 // rbx: method
1401 // _bcp_register: bcp
1402 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1403 // rax: mdi
1404 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1405 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1406 addptr(rbx, in_bytes(MethodData::data_offset()));
1407 addptr(rax, rbx);
1408 bind(set_mdp);
1409 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1410 pop(rbx);
1411 pop(rax);
1412 }
1413
1414 void InterpreterMacroAssembler::verify_method_data_pointer() {
1415 assert(ProfileInterpreter, "must be profiling interpreter");
1416 #ifdef ASSERT
1417 Label verify_continue;
1418 push(rax);
1419 push(rbx);
1420 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1421 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1422 push(arg3_reg);
1423 push(arg2_reg);
1424 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1425 get_method(rbx);
1426
1427 // If the mdp is valid, it will point to a DataLayout header which is
1428 // consistent with the bcp. The converse is highly probable also.
1429 load_unsigned_short(arg2_reg,
1430 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1431 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1432 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1433 cmpptr(arg2_reg, _bcp_register);
1434 jcc(Assembler::equal, verify_continue);
1435 // rbx: method
1436 // _bcp_register: bcp
1437 // c_rarg3: mdp
1438 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1439 rbx, _bcp_register, arg3_reg);
1440 bind(verify_continue);
1441 pop(arg2_reg);
1442 pop(arg3_reg);
1443 pop(rbx);
1444 pop(rax);
1445 #endif // ASSERT
1446 }
1447
1448
1449 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1450 int constant,
1451 Register value) {
1452 assert(ProfileInterpreter, "must be profiling interpreter");
1453 Address data(mdp_in, constant);
1454 movptr(data, value);
1455 }
1456
1457
1458 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1459 int constant,
1460 bool decrement) {
1461 // Counter address
1462 Address data(mdp_in, constant);
1463
1464 increment_mdp_data_at(data, decrement);
1465 }
1466
1467 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1468 bool decrement) {
1469 assert(ProfileInterpreter, "must be profiling interpreter");
1470 // %%% this does 64bit counters at best it is wasting space
1471 // at worst it is a rare bug when counters overflow
1472
1473 if (decrement) {
1474 // Decrement the register. Set condition codes.
1475 addptr(data, (int32_t) -DataLayout::counter_increment);
1476 // If the decrement causes the counter to overflow, stay negative
1477 Label L;
1478 jcc(Assembler::negative, L);
1479 addptr(data, (int32_t) DataLayout::counter_increment);
1480 bind(L);
1481 } else {
1482 assert(DataLayout::counter_increment == 1,
1483 "flow-free idiom only works with 1");
1484 // Increment the register. Set carry flag.
1485 addptr(data, DataLayout::counter_increment);
1486 // If the increment causes the counter to overflow, pull back by 1.
1487 sbbptr(data, (int32_t)0);
1488 }
1489 }
1490
1491
1492 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1493 Register reg,
1494 int constant,
1495 bool decrement) {
1496 Address data(mdp_in, reg, Address::times_1, constant);
1497
1498 increment_mdp_data_at(data, decrement);
1499 }
1500
1501 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1502 int flag_byte_constant) {
1503 assert(ProfileInterpreter, "must be profiling interpreter");
1504 int header_offset = in_bytes(DataLayout::flags_offset());
1505 int header_bits = flag_byte_constant;
1506 // Set the flag
1507 orb(Address(mdp_in, header_offset), header_bits);
1508 }
1509
1510
1511
1512 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1513 int offset,
1514 Register value,
1515 Register test_value_out,
1516 Label& not_equal_continue) {
1517 assert(ProfileInterpreter, "must be profiling interpreter");
1518 if (test_value_out == noreg) {
1519 cmpptr(value, Address(mdp_in, offset));
1520 } else {
1521 // Put the test value into a register, so caller can use it:
1522 movptr(test_value_out, Address(mdp_in, offset));
1523 cmpptr(test_value_out, value);
1524 }
1525 jcc(Assembler::notEqual, not_equal_continue);
1526 }
1527
1528
1529 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1530 int offset_of_disp) {
1531 assert(ProfileInterpreter, "must be profiling interpreter");
1532 Address disp_address(mdp_in, offset_of_disp);
1533 addptr(mdp_in, disp_address);
1534 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1535 }
1536
1537
1538 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1539 Register reg,
1540 int offset_of_disp) {
1541 assert(ProfileInterpreter, "must be profiling interpreter");
1542 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1543 addptr(mdp_in, disp_address);
1544 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1545 }
1546
1547
1548 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1549 int constant) {
1550 assert(ProfileInterpreter, "must be profiling interpreter");
1551 addptr(mdp_in, constant);
1552 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1553 }
1554
1555
1556 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1557 assert(ProfileInterpreter, "must be profiling interpreter");
1558 push(return_bci); // save/restore across call_VM
1559 call_VM(noreg,
1560 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1561 return_bci);
1562 pop(return_bci);
1563 }
1564
1565
1566 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1567 Register bumped_count) {
1568 if (ProfileInterpreter) {
1569 Label profile_continue;
1570
1571 // If no method data exists, go to profile_continue.
1572 // Otherwise, assign to mdp
1573 test_method_data_pointer(mdp, profile_continue);
1574
1575 // We are taking a branch. Increment the taken count.
1576 // We inline increment_mdp_data_at to return bumped_count in a register
1577 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1578 Address data(mdp, in_bytes(JumpData::taken_offset()));
1579 movptr(bumped_count, data);
1580 assert(DataLayout::counter_increment == 1,
1581 "flow-free idiom only works with 1");
1582 addptr(bumped_count, DataLayout::counter_increment);
1583 sbbptr(bumped_count, 0);
1584 movptr(data, bumped_count); // Store back out
1585
1586 // The method data pointer needs to be updated to reflect the new target.
1587 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1588 bind(profile_continue);
1589 }
1590 }
1591
1592
1593 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1594 if (ProfileInterpreter) {
1595 Label profile_continue;
1596
1597 // If no method data exists, go to profile_continue.
1598 test_method_data_pointer(mdp, profile_continue);
1599
1600 // We are taking a branch. Increment the not taken count.
1601 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1602
1603 // The method data pointer needs to be updated to correspond to
1604 // the next bytecode
1605 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1606 bind(profile_continue);
1607 }
1608 }
1609
1610 void InterpreterMacroAssembler::profile_call(Register mdp) {
1611 if (ProfileInterpreter) {
1612 Label profile_continue;
1613
1614 // If no method data exists, go to profile_continue.
1615 test_method_data_pointer(mdp, profile_continue);
1616
1617 // We are making a call. Increment the count.
1618 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1619
1620 // The method data pointer needs to be updated to reflect the new target.
1621 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1622 bind(profile_continue);
1623 }
1624 }
1625
1626
1627 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1628 if (ProfileInterpreter) {
1629 Label profile_continue;
1630
1631 // If no method data exists, go to profile_continue.
1632 test_method_data_pointer(mdp, profile_continue);
1633
1634 // We are making a call. Increment the count.
1635 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1636
1637 // The method data pointer needs to be updated to reflect the new target.
1638 update_mdp_by_constant(mdp,
1639 in_bytes(VirtualCallData::
1640 virtual_call_data_size()));
1641 bind(profile_continue);
1642 }
1643 }
1644
1645
1646 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1647 Register mdp,
1648 Register reg2,
1649 bool receiver_can_be_null) {
1650 if (ProfileInterpreter) {
1651 Label profile_continue;
1652
1653 // If no method data exists, go to profile_continue.
1654 test_method_data_pointer(mdp, profile_continue);
1655
1656 Label skip_receiver_profile;
1657 if (receiver_can_be_null) {
1658 Label not_null;
1659 testptr(receiver, receiver);
1660 jccb(Assembler::notZero, not_null);
1661 // We are making a call. Increment the count for null receiver.
1662 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1663 jmp(skip_receiver_profile);
1664 bind(not_null);
1665 }
1666
1667 // Record the receiver type.
1668 record_klass_in_profile(receiver, mdp, reg2, true);
1669 bind(skip_receiver_profile);
1670
1671 // The method data pointer needs to be updated to reflect the new target.
1672 #if INCLUDE_JVMCI
1673 if (MethodProfileWidth == 0) {
1674 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1675 }
1676 #else // INCLUDE_JVMCI
1677 update_mdp_by_constant(mdp,
1678 in_bytes(VirtualCallData::
1679 virtual_call_data_size()));
1680 #endif // INCLUDE_JVMCI
1681 bind(profile_continue);
1682 }
1683 }
1684
1685 #if INCLUDE_JVMCI
1686 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1687 assert_different_registers(method, mdp, reg2);
1688 if (ProfileInterpreter && MethodProfileWidth > 0) {
1689 Label profile_continue;
1690
1691 // If no method data exists, go to profile_continue.
1692 test_method_data_pointer(mdp, profile_continue);
1693
1694 Label done;
1695 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1696 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1697 bind(done);
1698
1699 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1700 bind(profile_continue);
1701 }
1702 }
1703 #endif // INCLUDE_JVMCI
1704
1705 // This routine creates a state machine for updating the multi-row
1706 // type profile at a virtual call site (or other type-sensitive bytecode).
1707 // The machine visits each row (of receiver/count) until the receiver type
1708 // is found, or until it runs out of rows. At the same time, it remembers
1709 // the location of the first empty row. (An empty row records null for its
1710 // receiver, and can be allocated for a newly-observed receiver type.)
1711 // Because there are two degrees of freedom in the state, a simple linear
1712 // search will not work; it must be a decision tree. Hence this helper
1713 // function is recursive, to generate the required tree structured code.
1714 // It's the interpreter, so we are trading off code space for speed.
1715 // See below for example code.
1716 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1717 Register receiver, Register mdp,
1718 Register reg2, int start_row,
1719 Label& done, bool is_virtual_call) {
1720 if (TypeProfileWidth == 0) {
1721 if (is_virtual_call) {
1722 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1723 }
1724 #if INCLUDE_JVMCI
1725 else if (EnableJVMCI) {
1726 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1727 }
1728 #endif // INCLUDE_JVMCI
1729 } else {
1730 int non_profiled_offset = -1;
1731 if (is_virtual_call) {
1732 non_profiled_offset = in_bytes(CounterData::count_offset());
1733 }
1734 #if INCLUDE_JVMCI
1735 else if (EnableJVMCI) {
1736 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1737 }
1738 #endif // INCLUDE_JVMCI
1739
1740 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1741 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1742 }
1743 }
1744
1745 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1746 Register reg2, int start_row, Label& done, int total_rows,
1747 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1748 int non_profiled_offset) {
1749 int last_row = total_rows - 1;
1750 assert(start_row <= last_row, "must be work left to do");
1751 // Test this row for both the item and for null.
1752 // Take any of three different outcomes:
1753 // 1. found item => increment count and goto done
1754 // 2. found null => keep looking for case 1, maybe allocate this cell
1755 // 3. found something else => keep looking for cases 1 and 2
1756 // Case 3 is handled by a recursive call.
1757 for (int row = start_row; row <= last_row; row++) {
1758 Label next_test;
1759 bool test_for_null_also = (row == start_row);
1760
1761 // See if the item is item[n].
1762 int item_offset = in_bytes(item_offset_fn(row));
1763 test_mdp_data_at(mdp, item_offset, item,
1764 (test_for_null_also ? reg2 : noreg),
1765 next_test);
1766 // (Reg2 now contains the item from the CallData.)
1767
1768 // The item is item[n]. Increment count[n].
1769 int count_offset = in_bytes(item_count_offset_fn(row));
1770 increment_mdp_data_at(mdp, count_offset);
1771 jmp(done);
1772 bind(next_test);
1773
1774 if (test_for_null_also) {
1775 Label found_null;
1776 // Failed the equality check on item[n]... Test for null.
1777 testptr(reg2, reg2);
1778 if (start_row == last_row) {
1779 // The only thing left to do is handle the null case.
1780 if (non_profiled_offset >= 0) {
1781 jccb(Assembler::zero, found_null);
1782 // Item did not match any saved item and there is no empty row for it.
1783 // Increment total counter to indicate polymorphic case.
1784 increment_mdp_data_at(mdp, non_profiled_offset);
1785 jmp(done);
1786 bind(found_null);
1787 } else {
1788 jcc(Assembler::notZero, done);
1789 }
1790 break;
1791 }
1792 // Since null is rare, make it be the branch-taken case.
1793 jcc(Assembler::zero, found_null);
1794
1795 // Put all the "Case 3" tests here.
1796 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1797 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1798
1799 // Found a null. Keep searching for a matching item,
1800 // but remember that this is an empty (unused) slot.
1801 bind(found_null);
1802 }
1803 }
1804
1805 // In the fall-through case, we found no matching item, but we
1806 // observed the item[start_row] is NULL.
1807
1808 // Fill in the item field and increment the count.
1809 int item_offset = in_bytes(item_offset_fn(start_row));
1810 set_mdp_data_at(mdp, item_offset, item);
1811 int count_offset = in_bytes(item_count_offset_fn(start_row));
1812 movl(reg2, DataLayout::counter_increment);
1813 set_mdp_data_at(mdp, count_offset, reg2);
1814 if (start_row > 0) {
1815 jmp(done);
1816 }
1817 }
1818
1819 // Example state machine code for three profile rows:
1820 // // main copy of decision tree, rooted at row[1]
1821 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1822 // if (row[0].rec != NULL) {
1823 // // inner copy of decision tree, rooted at row[1]
1824 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1825 // if (row[1].rec != NULL) {
1826 // // degenerate decision tree, rooted at row[2]
1827 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1828 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1829 // row[2].init(rec); goto done;
1830 // } else {
1831 // // remember row[1] is empty
1832 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1833 // row[1].init(rec); goto done;
1834 // }
1835 // } else {
1836 // // remember row[0] is empty
1837 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1838 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1839 // row[0].init(rec); goto done;
1840 // }
1841 // done:
1842
1843 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1844 Register mdp, Register reg2,
1845 bool is_virtual_call) {
1846 assert(ProfileInterpreter, "must be profiling");
1847 Label done;
1848
1849 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1850
1851 bind (done);
1852 }
1853
1854 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1855 Register mdp) {
1856 if (ProfileInterpreter) {
1857 Label profile_continue;
1858 uint row;
1859
1860 // If no method data exists, go to profile_continue.
1861 test_method_data_pointer(mdp, profile_continue);
1862
1863 // Update the total ret count.
1864 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1865
1866 for (row = 0; row < RetData::row_limit(); row++) {
1867 Label next_test;
1868
1869 // See if return_bci is equal to bci[n]:
1870 test_mdp_data_at(mdp,
1871 in_bytes(RetData::bci_offset(row)),
1872 return_bci, noreg,
1873 next_test);
1874
1875 // return_bci is equal to bci[n]. Increment the count.
1876 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1877
1878 // The method data pointer needs to be updated to reflect the new target.
1879 update_mdp_by_offset(mdp,
1880 in_bytes(RetData::bci_displacement_offset(row)));
1881 jmp(profile_continue);
1882 bind(next_test);
1883 }
1884
1885 update_mdp_for_ret(return_bci);
1886
1887 bind(profile_continue);
1888 }
1889 }
1890
1891
1892 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1893 if (ProfileInterpreter) {
1894 Label profile_continue;
1895
1896 // If no method data exists, go to profile_continue.
1897 test_method_data_pointer(mdp, profile_continue);
1898
1899 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1900
1901 // The method data pointer needs to be updated.
1902 int mdp_delta = in_bytes(BitData::bit_data_size());
1903 if (TypeProfileCasts) {
1904 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1905 }
1906 update_mdp_by_constant(mdp, mdp_delta);
1907
1908 bind(profile_continue);
1909 }
1910 }
1911
1912
1913 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1914 if (ProfileInterpreter && TypeProfileCasts) {
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 int count_offset = in_bytes(CounterData::count_offset());
1921 // Back up the address, since we have already bumped the mdp.
1922 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1923
1924 // *Decrement* the counter. We expect to see zero or small negatives.
1925 increment_mdp_data_at(mdp, count_offset, true);
1926
1927 bind (profile_continue);
1928 }
1929 }
1930
1931
1932 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1933 if (ProfileInterpreter) {
1934 Label profile_continue;
1935
1936 // If no method data exists, go to profile_continue.
1937 test_method_data_pointer(mdp, profile_continue);
1938
1939 // The method data pointer needs to be updated.
1940 int mdp_delta = in_bytes(BitData::bit_data_size());
1941 if (TypeProfileCasts) {
1942 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1943
1944 // Record the object type.
1945 record_klass_in_profile(klass, mdp, reg2, false);
1946 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1947 NOT_LP64(restore_locals();) // Restore EDI
1948 }
1949 update_mdp_by_constant(mdp, mdp_delta);
1950
1951 bind(profile_continue);
1952 }
1953 }
1954
1955
1956 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1957 if (ProfileInterpreter) {
1958 Label profile_continue;
1959
1960 // If no method data exists, go to profile_continue.
1961 test_method_data_pointer(mdp, profile_continue);
1962
1963 // Update the default case count
1964 increment_mdp_data_at(mdp,
1965 in_bytes(MultiBranchData::default_count_offset()));
1966
1967 // The method data pointer needs to be updated.
1968 update_mdp_by_offset(mdp,
1969 in_bytes(MultiBranchData::
1970 default_displacement_offset()));
1971
1972 bind(profile_continue);
1973 }
1974 }
1975
1976
1977 void InterpreterMacroAssembler::profile_switch_case(Register index,
1978 Register mdp,
1979 Register reg2) {
1980 if (ProfileInterpreter) {
1981 Label profile_continue;
1982
1983 // If no method data exists, go to profile_continue.
1984 test_method_data_pointer(mdp, profile_continue);
1985
1986 // Build the base (index * per_case_size_in_bytes()) +
1987 // case_array_offset_in_bytes()
1988 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1989 imulptr(index, reg2); // XXX l ?
1990 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1991
1992 // Update the case count
1993 increment_mdp_data_at(mdp,
1994 index,
1995 in_bytes(MultiBranchData::relative_count_offset()));
1996
1997 // The method data pointer needs to be updated.
1998 update_mdp_by_offset(mdp,
1999 index,
2000 in_bytes(MultiBranchData::
2001 relative_displacement_offset()));
2002
2003 bind(profile_continue);
2004 }
2005 }
2006
2007
2008
2009 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
2010 if (state == atos) {
2011 MacroAssembler::verify_oop(reg);
2012 }
2013 }
2014
2015 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
2016 #ifndef _LP64
2017 if ((state == ftos && UseSSE < 1) ||
2018 (state == dtos && UseSSE < 2)) {
2019 MacroAssembler::verify_FPU(stack_depth);
2020 }
2021 #endif
2022 }
2023
2024 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
2025 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
2026 int increment, Address mask,
2027 Register scratch, bool preloaded,
2028 Condition cond, Label* where) {
2029 if (!preloaded) {
2030 movl(scratch, counter_addr);
2031 }
2032 incrementl(scratch, increment);
2033 movl(counter_addr, scratch);
2034 andl(scratch, mask);
2035 if (where != NULL) {
2036 jcc(cond, *where);
2037 }
2038 }
2039
2040 void InterpreterMacroAssembler::notify_method_entry() {
2041 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2042 // track stack depth. If it is possible to enter interp_only_mode we add
2043 // the code to check if the event should be sent.
2044 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2045 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2046 if (JvmtiExport::can_post_interpreter_events()) {
2047 Label L;
2048 NOT_LP64(get_thread(rthread);)
2049 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2050 testl(rdx, rdx);
2051 jcc(Assembler::zero, L);
2052 call_VM(noreg, CAST_FROM_FN_PTR(address,
2053 InterpreterRuntime::post_method_entry));
2054 bind(L);
2055 }
2056
2057 {
2058 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2059 NOT_LP64(get_thread(rthread);)
2060 get_method(rarg);
2061 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2062 rthread, rarg);
2063 }
2064
2065 // RedefineClasses() tracing support for obsolete method entry
2066 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2067 NOT_LP64(get_thread(rthread);)
2068 get_method(rarg);
2069 call_VM_leaf(
2070 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2071 rthread, rarg);
2072 }
2073 }
2074
2075
2076 void InterpreterMacroAssembler::notify_method_exit(
2077 TosState state, NotifyMethodExitMode mode) {
2078 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2079 // track stack depth. If it is possible to enter interp_only_mode we add
2080 // the code to check if the event should be sent.
2081 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2082 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2083 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2084 Label L;
2085 // Note: frame::interpreter_frame_result has a dependency on how the
2086 // method result is saved across the call to post_method_exit. If this
2087 // is changed then the interpreter_frame_result implementation will
2088 // need to be updated too.
2089
2090 // template interpreter will leave the result on the top of the stack.
2091 push(state);
2092 NOT_LP64(get_thread(rthread);)
2093 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2094 testl(rdx, rdx);
2095 jcc(Assembler::zero, L);
2096 call_VM(noreg,
2097 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2098 bind(L);
2099 pop(state);
2100 }
2101
2102 {
2103 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2104 push(state);
2105 NOT_LP64(get_thread(rthread);)
2106 get_method(rarg);
2107 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2108 rthread, rarg);
2109 pop(state);
2110 }
2111 }