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/safepointMechanism.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/thread.inline.hpp"
43
44 // Implementation of InterpreterMacroAssembler
45
46 void InterpreterMacroAssembler::jump_to_entry(address entry) {
47 assert(entry, "Entry must have been generated by now");
48 jump(RuntimeAddress(entry));
49 }
50
51 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
52 Label update, next, none;
53
54 verify_oop(obj);
55
56 testptr(obj, obj);
57 jccb(Assembler::notZero, update);
58 orptr(mdo_addr, TypeEntries::null_seen);
59 jmpb(next);
60
61 bind(update);
62 load_klass(obj, obj);
63
64 xorptr(obj, mdo_addr);
65 testptr(obj, TypeEntries::type_klass_mask);
66 jccb(Assembler::zero, next); // klass seen before, nothing to
67 // do. The unknown bit may have been
68 // set already but no need to check.
69
70 testptr(obj, TypeEntries::type_unknown);
71 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
72
73 cmpptr(mdo_addr, 0);
74 jccb(Assembler::equal, none);
75 cmpptr(mdo_addr, TypeEntries::null_seen);
76 jccb(Assembler::equal, none);
77 // There is a chance that the checks above (re-reading profiling
78 // data from memory) fail if another thread has just set the
79 // profiling to this obj's klass
80 xorptr(obj, mdo_addr);
81 testptr(obj, TypeEntries::type_klass_mask);
82 jccb(Assembler::zero, next);
83
84 // different than before. Cannot keep accurate profile.
85 orptr(mdo_addr, TypeEntries::type_unknown);
86 jmpb(next);
87
88 bind(none);
89 // first time here. Set profile type.
90 movptr(mdo_addr, obj);
91
92 bind(next);
93 }
94
95 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
96 if (!ProfileInterpreter) {
97 return;
98 }
99
100 if (MethodData::profile_arguments() || MethodData::profile_return()) {
101 Label profile_continue;
102
103 test_method_data_pointer(mdp, profile_continue);
104
105 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
106
107 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
108 jcc(Assembler::notEqual, profile_continue);
109
110 if (MethodData::profile_arguments()) {
111 Label done;
112 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
113 addptr(mdp, off_to_args);
114
115 for (int i = 0; i < TypeProfileArgsLimit; i++) {
116 if (i > 0 || MethodData::profile_return()) {
117 // If return value type is profiled we may have no argument to profile
118 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
119 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
120 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
121 jcc(Assembler::less, done);
122 }
123 movptr(tmp, Address(callee, Method::const_offset()));
124 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
125 // stack offset o (zero based) from the start of the argument
126 // list, for n arguments translates into offset n - o - 1 from
127 // the end of the argument list
128 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
129 subl(tmp, 1);
130 Address arg_addr = argument_address(tmp);
131 movptr(tmp, arg_addr);
132
133 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
134 profile_obj_type(tmp, mdo_arg_addr);
135
136 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
137 addptr(mdp, to_add);
138 off_to_args += to_add;
139 }
140
141 if (MethodData::profile_return()) {
142 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
143 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
144 }
145
146 bind(done);
147
148 if (MethodData::profile_return()) {
149 // We're right after the type profile for the last
150 // argument. tmp is the number of cells left in the
151 // CallTypeData/VirtualCallTypeData to reach its end. Non null
152 // if there's a return to profile.
153 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
154 shll(tmp, exact_log2(DataLayout::cell_size));
155 addptr(mdp, tmp);
156 }
157 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
158 } else {
159 assert(MethodData::profile_return(), "either profile call args or call ret");
160 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
161 }
162
163 // mdp points right after the end of the
164 // CallTypeData/VirtualCallTypeData, right after the cells for the
165 // return value type if there's one
166
167 bind(profile_continue);
168 }
169 }
170
171 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
172 assert_different_registers(mdp, ret, tmp, _bcp_register);
173 if (ProfileInterpreter && MethodData::profile_return()) {
174 Label profile_continue, done;
175
176 test_method_data_pointer(mdp, profile_continue);
177
178 if (MethodData::profile_return_jsr292_only()) {
179 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
180
181 // If we don't profile all invoke bytecodes we must make sure
182 // it's a bytecode we indeed profile. We can't go back to the
183 // begining of the ProfileData we intend to update to check its
184 // type because we're right after it and we don't known its
185 // length
186 Label do_profile;
187 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
188 jcc(Assembler::equal, do_profile);
189 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
190 jcc(Assembler::equal, do_profile);
191 get_method(tmp);
192 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
193 jcc(Assembler::notEqual, profile_continue);
194
195 bind(do_profile);
196 }
197
198 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
199 mov(tmp, ret);
200 profile_obj_type(tmp, mdo_ret_addr);
201
202 bind(profile_continue);
203 }
204 }
205
206 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
207 if (ProfileInterpreter && MethodData::profile_parameters()) {
208 Label profile_continue, done;
209
210 test_method_data_pointer(mdp, profile_continue);
211
212 // Load the offset of the area within the MDO used for
213 // parameters. If it's negative we're not profiling any parameters
214 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
215 testl(tmp1, tmp1);
216 jcc(Assembler::negative, profile_continue);
217
218 // Compute a pointer to the area for parameters from the offset
219 // and move the pointer to the slot for the last
220 // parameters. Collect profiling from last parameter down.
221 // mdo start + parameters offset + array length - 1
222 addptr(mdp, tmp1);
223 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
224 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
225
226 Label loop;
227 bind(loop);
228
229 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
230 int type_base = in_bytes(ParametersTypeData::type_offset(0));
231 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
232 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
233 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
234
235 // load offset on the stack from the slot for this parameter
236 movptr(tmp2, arg_off);
237 negptr(tmp2);
238 // read the parameter from the local area
239 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
240
241 // profile the parameter
242 profile_obj_type(tmp2, arg_type);
243
244 // go to next parameter
245 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
246 jcc(Assembler::positive, loop);
247
248 bind(profile_continue);
249 }
250 }
251
252 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
253 int number_of_arguments) {
254 // interpreter specific
255 //
256 // Note: No need to save/restore bcp & locals registers
257 // since these are callee saved registers and no blocking/
258 // GC can happen in leaf calls.
259 // Further Note: DO NOT save/restore bcp/locals. If a caller has
260 // already saved them so that it can use rsi/rdi as temporaries
261 // then a save/restore here will DESTROY the copy the caller
262 // saved! There used to be a save_bcp() that only happened in
263 // the ASSERT path (no restore_bcp). Which caused bizarre failures
264 // when jvm built with ASSERTs.
265 #ifdef ASSERT
266 {
267 Label L;
268 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
269 jcc(Assembler::equal, L);
270 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
271 " last_sp != NULL");
272 bind(L);
273 }
274 #endif
275 // super call
276 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
277 // interpreter specific
278 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
279 // but since they may not have been saved (and we don't want to
280 // save them here (see note above) the assert is invalid.
281 }
282
283 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
284 Register java_thread,
285 Register last_java_sp,
286 address entry_point,
287 int number_of_arguments,
288 bool check_exceptions) {
289 // interpreter specific
290 //
291 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
292 // really make a difference for these runtime calls, since they are
293 // slow anyway. Btw., bcp must be saved/restored since it may change
294 // due to GC.
295 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
296 save_bcp();
297 #ifdef ASSERT
298 {
299 Label L;
300 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
301 jcc(Assembler::equal, L);
302 stop("InterpreterMacroAssembler::call_VM_base:"
303 " last_sp != NULL");
304 bind(L);
305 }
306 #endif /* ASSERT */
307 // super call
308 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
309 entry_point, number_of_arguments,
310 check_exceptions);
311 // interpreter specific
312 restore_bcp();
313 restore_locals();
314 }
315
316 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
317 if (JvmtiExport::can_pop_frame()) {
318 Label L;
319 // Initiate popframe handling only if it is not already being
320 // processed. If the flag has the popframe_processing bit set, it
321 // means that this code is called *during* popframe handling - we
322 // don't want to reenter.
323 // This method is only called just after the call into the vm in
324 // call_VM_base, so the arg registers are available.
325 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
326 LP64_ONLY(c_rarg0);
327 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
328 testl(pop_cond, JavaThread::popframe_pending_bit);
329 jcc(Assembler::zero, L);
330 testl(pop_cond, JavaThread::popframe_processing_bit);
331 jcc(Assembler::notZero, L);
332 // Call Interpreter::remove_activation_preserving_args_entry() to get the
333 // address of the same-named entrypoint in the generated interpreter code.
334 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
335 jmp(rax);
336 bind(L);
337 NOT_LP64(get_thread(java_thread);)
338 }
339 }
340
341 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
342 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
343 NOT_LP64(get_thread(thread);)
344 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
345 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
346 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
347 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
348 #ifdef _LP64
349 switch (state) {
350 case atos: movptr(rax, oop_addr);
351 movptr(oop_addr, (int32_t)NULL_WORD);
352 verify_oop(rax, state); break;
353 case ltos: movptr(rax, val_addr); break;
354 case btos: // fall through
355 case ztos: // fall through
356 case ctos: // fall through
357 case stos: // fall through
358 case itos: movl(rax, val_addr); break;
359 case ftos: load_float(val_addr); break;
360 case dtos: load_double(val_addr); break;
361 case vtos: /* nothing to do */ break;
362 default : ShouldNotReachHere();
363 }
364 // Clean up tos value in the thread object
365 movl(tos_addr, (int) ilgl);
366 movl(val_addr, (int32_t) NULL_WORD);
367 #else
368 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
369 + in_ByteSize(wordSize));
370 switch (state) {
371 case atos: movptr(rax, oop_addr);
372 movptr(oop_addr, NULL_WORD);
373 verify_oop(rax, state); break;
374 case ltos:
375 movl(rdx, val_addr1); // fall through
376 case btos: // fall through
377 case ztos: // fall through
378 case ctos: // fall through
379 case stos: // fall through
380 case itos: movl(rax, val_addr); break;
381 case ftos: load_float(val_addr); break;
382 case dtos: load_double(val_addr); break;
383 case vtos: /* nothing to do */ break;
384 default : ShouldNotReachHere();
385 }
386 #endif // _LP64
387 // Clean up tos value in the thread object
388 movl(tos_addr, (int32_t) ilgl);
389 movptr(val_addr, NULL_WORD);
390 NOT_LP64(movptr(val_addr1, NULL_WORD);)
391 }
392
393
394 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
395 if (JvmtiExport::can_force_early_return()) {
396 Label L;
397 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
398 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
399
400 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
401 testptr(tmp, tmp);
402 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
403
404 // Initiate earlyret handling only if it is not already being processed.
405 // If the flag has the earlyret_processing bit set, it means that this code
406 // is called *during* earlyret handling - we don't want to reenter.
407 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
408 cmpl(tmp, JvmtiThreadState::earlyret_pending);
409 jcc(Assembler::notEqual, L);
410
411 // Call Interpreter::remove_activation_early_entry() to get the address of the
412 // same-named entrypoint in the generated interpreter code.
413 NOT_LP64(get_thread(java_thread);)
414 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
415 #ifdef _LP64
416 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
417 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
418 #else
419 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
420 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
421 #endif // _LP64
422 jmp(rax);
423 bind(L);
424 NOT_LP64(get_thread(java_thread);)
425 }
426 }
427
428 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
429 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
430 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
431 bswapl(reg);
432 shrl(reg, 16);
433 }
434
435 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
436 int bcp_offset,
437 size_t index_size) {
438 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
439 if (index_size == sizeof(u2)) {
440 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
441 } else if (index_size == sizeof(u4)) {
442 movl(index, Address(_bcp_register, bcp_offset));
443 // Check if the secondary index definition is still ~x, otherwise
444 // we have to change the following assembler code to calculate the
445 // plain index.
446 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
447 notl(index); // convert to plain index
448 } else if (index_size == sizeof(u1)) {
449 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
450 } else {
451 ShouldNotReachHere();
452 }
453 }
454
455 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
456 Register index,
457 int bcp_offset,
458 size_t index_size) {
459 assert_different_registers(cache, index);
460 get_cache_index_at_bcp(index, bcp_offset, index_size);
461 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
462 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
463 // convert from field index to ConstantPoolCacheEntry index
464 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
465 shll(index, 2);
466 }
467
468 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
469 Register index,
470 Register bytecode,
471 int byte_no,
472 int bcp_offset,
473 size_t index_size) {
474 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
475 // We use a 32-bit load here since the layout of 64-bit words on
476 // little-endian machines allow us that.
477 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
478 const int shift_count = (1 + byte_no) * BitsPerByte;
479 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
480 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
481 "correct shift count");
482 shrl(bytecode, shift_count);
483 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
484 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
485 }
486
487 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
488 Register tmp,
489 int bcp_offset,
490 size_t index_size) {
491 assert(cache != tmp, "must use different register");
492 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
493 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
494 // convert from field index to ConstantPoolCacheEntry index
495 // and from word offset to byte offset
496 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
497 shll(tmp, 2 + LogBytesPerWord);
498 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
499 // skip past the header
500 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
501 addptr(cache, tmp); // construct pointer to cache entry
502 }
503
504 // Load object from cpool->resolved_references(index)
505 void InterpreterMacroAssembler::load_resolved_reference_at_index(
506 Register result, Register index) {
507 assert_different_registers(result, index);
508 // convert from field index to resolved_references() index and from
509 // word index to byte offset. Since this is a java object, it can be compressed
510 Register tmp = index; // reuse
511 shll(tmp, LogBytesPerHeapOop);
512
513 get_constant_pool(result);
514 // load pointer for resolved_references[] objArray
515 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
516 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
517 resolve_oop_handle(result);
518 // Add in the index
519 addptr(result, tmp);
520 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
521 // The resulting oop is null if the reference is not yet resolved.
522 // It is Universe::the_null_sentinel() if the reference resolved to NULL via condy.
523 }
524
525 // load cpool->resolved_klass_at(index)
526 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool,
527 Register index, Register klass) {
528 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
529 Register resolved_klasses = cpool;
530 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
531 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
532 }
533
534 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
535 // subtype of super_klass.
536 //
537 // Args:
538 // rax: superklass
539 // Rsub_klass: subklass
540 //
541 // Kills:
542 // rcx, rdi
543 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
544 Label& ok_is_subtype) {
545 assert(Rsub_klass != rax, "rax holds superklass");
546 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
547 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
548 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
549 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
550
551 // Profile the not-null value's klass.
552 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
553
554 // Do the check.
555 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
556
557 // Profile the failure of the check.
558 profile_typecheck_failed(rcx); // blows rcx
559 }
560
561
562 #ifndef _LP64
563 void InterpreterMacroAssembler::f2ieee() {
564 if (IEEEPrecision) {
565 fstp_s(Address(rsp, 0));
566 fld_s(Address(rsp, 0));
567 }
568 }
569
570
571 void InterpreterMacroAssembler::d2ieee() {
572 if (IEEEPrecision) {
573 fstp_d(Address(rsp, 0));
574 fld_d(Address(rsp, 0));
575 }
576 }
577 #endif // _LP64
578
579 // Java Expression Stack
580
581 void InterpreterMacroAssembler::pop_ptr(Register r) {
582 pop(r);
583 }
584
585 void InterpreterMacroAssembler::push_ptr(Register r) {
586 push(r);
587 }
588
589 void InterpreterMacroAssembler::push_i(Register r) {
590 push(r);
591 }
592
593 void InterpreterMacroAssembler::push_f(XMMRegister r) {
594 subptr(rsp, wordSize);
595 movflt(Address(rsp, 0), r);
596 }
597
598 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
599 movflt(r, Address(rsp, 0));
600 addptr(rsp, wordSize);
601 }
602
603 void InterpreterMacroAssembler::push_d(XMMRegister r) {
604 subptr(rsp, 2 * wordSize);
605 movdbl(Address(rsp, 0), r);
606 }
607
608 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
609 movdbl(r, Address(rsp, 0));
610 addptr(rsp, 2 * Interpreter::stackElementSize);
611 }
612
613 #ifdef _LP64
614 void InterpreterMacroAssembler::pop_i(Register r) {
615 // XXX can't use pop currently, upper half non clean
616 movl(r, Address(rsp, 0));
617 addptr(rsp, wordSize);
618 }
619
620 void InterpreterMacroAssembler::pop_l(Register r) {
621 movq(r, Address(rsp, 0));
622 addptr(rsp, 2 * Interpreter::stackElementSize);
623 }
624
625 void InterpreterMacroAssembler::push_l(Register r) {
626 subptr(rsp, 2 * wordSize);
627 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
628 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
629 }
630
631 void InterpreterMacroAssembler::pop(TosState state) {
632 switch (state) {
633 case atos: pop_ptr(); break;
634 case btos:
635 case ztos:
636 case ctos:
637 case stos:
638 case itos: pop_i(); break;
639 case ltos: pop_l(); break;
640 case ftos: pop_f(xmm0); break;
641 case dtos: pop_d(xmm0); break;
642 case vtos: /* nothing to do */ break;
643 default: ShouldNotReachHere();
644 }
645 verify_oop(rax, state);
646 }
647
648 void InterpreterMacroAssembler::push(TosState state) {
649 verify_oop(rax, state);
650 switch (state) {
651 case atos: push_ptr(); break;
652 case btos:
653 case ztos:
654 case ctos:
655 case stos:
656 case itos: push_i(); break;
657 case ltos: push_l(); break;
658 case ftos: push_f(xmm0); break;
659 case dtos: push_d(xmm0); break;
660 case vtos: /* nothing to do */ break;
661 default : ShouldNotReachHere();
662 }
663 }
664 #else
665 void InterpreterMacroAssembler::pop_i(Register r) {
666 pop(r);
667 }
668
669 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
670 pop(lo);
671 pop(hi);
672 }
673
674 void InterpreterMacroAssembler::pop_f() {
675 fld_s(Address(rsp, 0));
676 addptr(rsp, 1 * wordSize);
677 }
678
679 void InterpreterMacroAssembler::pop_d() {
680 fld_d(Address(rsp, 0));
681 addptr(rsp, 2 * wordSize);
682 }
683
684
685 void InterpreterMacroAssembler::pop(TosState state) {
686 switch (state) {
687 case atos: pop_ptr(rax); break;
688 case btos: // fall through
689 case ztos: // fall through
690 case ctos: // fall through
691 case stos: // fall through
692 case itos: pop_i(rax); break;
693 case ltos: pop_l(rax, rdx); break;
694 case ftos:
695 if (UseSSE >= 1) {
696 pop_f(xmm0);
697 } else {
698 pop_f();
699 }
700 break;
701 case dtos:
702 if (UseSSE >= 2) {
703 pop_d(xmm0);
704 } else {
705 pop_d();
706 }
707 break;
708 case vtos: /* nothing to do */ break;
709 default : ShouldNotReachHere();
710 }
711 verify_oop(rax, state);
712 }
713
714
715 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
716 push(hi);
717 push(lo);
718 }
719
720 void InterpreterMacroAssembler::push_f() {
721 // Do not schedule for no AGI! Never write beyond rsp!
722 subptr(rsp, 1 * wordSize);
723 fstp_s(Address(rsp, 0));
724 }
725
726 void InterpreterMacroAssembler::push_d() {
727 // Do not schedule for no AGI! Never write beyond rsp!
728 subptr(rsp, 2 * wordSize);
729 fstp_d(Address(rsp, 0));
730 }
731
732
733 void InterpreterMacroAssembler::push(TosState state) {
734 verify_oop(rax, state);
735 switch (state) {
736 case atos: push_ptr(rax); break;
737 case btos: // fall through
738 case ztos: // fall through
739 case ctos: // fall through
740 case stos: // fall through
741 case itos: push_i(rax); break;
742 case ltos: push_l(rax, rdx); break;
743 case ftos:
744 if (UseSSE >= 1) {
745 push_f(xmm0);
746 } else {
747 push_f();
748 }
749 break;
750 case dtos:
751 if (UseSSE >= 2) {
752 push_d(xmm0);
753 } else {
754 push_d();
755 }
756 break;
757 case vtos: /* nothing to do */ break;
758 default : ShouldNotReachHere();
759 }
760 }
761 #endif // _LP64
762
763
764 // Helpers for swap and dup
765 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
766 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
767 }
768
769 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
770 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
771 }
772
773
774 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
775 // set sender sp
776 lea(_bcp_register, Address(rsp, wordSize));
777 // record last_sp
778 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
779 }
780
781
782 // Jump to from_interpreted entry of a call unless single stepping is possible
783 // in this thread in which case we must call the i2i entry
784 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
785 prepare_to_jump_from_interpreted();
786
787 if (JvmtiExport::can_post_interpreter_events()) {
788 Label run_compiled_code;
789 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
790 // compiled code in threads for which the event is enabled. Check here for
791 // interp_only_mode if these events CAN be enabled.
792 // interp_only is an int, on little endian it is sufficient to test the byte only
793 // Is a cmpl faster?
794 LP64_ONLY(temp = r15_thread;)
795 NOT_LP64(get_thread(temp);)
796 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
797 jccb(Assembler::zero, run_compiled_code);
798 jmp(Address(method, Method::interpreter_entry_offset()));
799 bind(run_compiled_code);
800 }
801
802 jmp(Address(method, Method::from_interpreted_offset()));
803 }
804
805 // The following two routines provide a hook so that an implementation
806 // can schedule the dispatch in two parts. x86 does not do this.
807 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
808 // Nothing x86 specific to be done here
809 }
810
811 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
812 dispatch_next(state, step);
813 }
814
815 void InterpreterMacroAssembler::dispatch_base(TosState state,
816 address* table,
817 bool verifyoop,
818 bool generate_poll) {
819 verify_FPU(1, state);
820 if (VerifyActivationFrameSize) {
821 Label L;
822 mov(rcx, rbp);
823 subptr(rcx, rsp);
824 int32_t min_frame_size =
825 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
826 wordSize;
827 cmpptr(rcx, (int32_t)min_frame_size);
828 jcc(Assembler::greaterEqual, L);
829 stop("broken stack frame");
830 bind(L);
831 }
832 if (verifyoop) {
833 verify_oop(rax, state);
834 }
835
836 address* const safepoint_table = Interpreter::safept_table(state);
837 #ifdef _LP64
838 Label no_safepoint, dispatch;
839 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
840 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
841 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
842
843 jccb(Assembler::zero, no_safepoint);
844 lea(rscratch1, ExternalAddress((address)safepoint_table));
845 jmpb(dispatch);
846 }
847
848 bind(no_safepoint);
849 lea(rscratch1, ExternalAddress((address)table));
850 bind(dispatch);
851 jmp(Address(rscratch1, rbx, Address::times_8));
852
853 #else
854 Address index(noreg, rbx, Address::times_ptr);
855 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
856 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
857 Label no_safepoint;
858 const Register thread = rcx;
859 get_thread(thread);
860 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
861
862 jccb(Assembler::zero, no_safepoint);
863 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
864 jump(dispatch_addr);
865 bind(no_safepoint);
866 }
867
868 {
869 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
870 jump(dispatch_addr);
871 }
872 #endif // _LP64
873 }
874
875 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
876 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
877 }
878
879 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
880 dispatch_base(state, Interpreter::normal_table(state));
881 }
882
883 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
884 dispatch_base(state, Interpreter::normal_table(state), false);
885 }
886
887
888 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
889 // load next bytecode (load before advancing _bcp_register to prevent AGI)
890 load_unsigned_byte(rbx, Address(_bcp_register, step));
891 // advance _bcp_register
892 increment(_bcp_register, step);
893 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
894 }
895
896 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
897 // load current bytecode
898 load_unsigned_byte(rbx, Address(_bcp_register, 0));
899 dispatch_base(state, table);
900 }
901
902 void InterpreterMacroAssembler::narrow(Register result) {
903
904 // Get method->_constMethod->_result_type
905 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
906 movptr(rcx, Address(rcx, Method::const_offset()));
907 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
908
909 Label done, notBool, notByte, notChar;
910
911 // common case first
912 cmpl(rcx, T_INT);
913 jcc(Assembler::equal, done);
914
915 // mask integer result to narrower return type.
916 cmpl(rcx, T_BOOLEAN);
917 jcc(Assembler::notEqual, notBool);
918 andl(result, 0x1);
919 jmp(done);
920
921 bind(notBool);
922 cmpl(rcx, T_BYTE);
923 jcc(Assembler::notEqual, notByte);
924 LP64_ONLY(movsbl(result, result);)
925 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
926 NOT_LP64(sarl(result, 24);) // and sign-extend byte
927 jmp(done);
928
929 bind(notByte);
930 cmpl(rcx, T_CHAR);
931 jcc(Assembler::notEqual, notChar);
932 LP64_ONLY(movzwl(result, result);)
933 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
934 jmp(done);
935
936 bind(notChar);
937 // cmpl(rcx, T_SHORT); // all that's left
938 // jcc(Assembler::notEqual, done);
939 LP64_ONLY(movswl(result, result);)
940 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
941 NOT_LP64(sarl(result, 16);) // and sign-extend short
942
943 // Nothing to do for T_INT
944 bind(done);
945 }
946
947 // remove activation
948 //
949 // Unlock the receiver if this is a synchronized method.
950 // Unlock any Java monitors from syncronized blocks.
951 // Remove the activation from the stack.
952 //
953 // If there are locked Java monitors
954 // If throw_monitor_exception
955 // throws IllegalMonitorStateException
956 // Else if install_monitor_exception
957 // installs IllegalMonitorStateException
958 // Else
959 // no error processing
960 void InterpreterMacroAssembler::remove_activation(
961 TosState state,
962 Register ret_addr,
963 bool throw_monitor_exception,
964 bool install_monitor_exception,
965 bool notify_jvmdi,
966 bool load_values) {
967 // Note: Registers rdx xmm0 may be in use for the
968 // result check if synchronized method
969 Label unlocked, unlock, no_unlock;
970
971 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
972 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
973 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
974 // monitor pointers need different register
975 // because rdx may have the result in it
976 NOT_LP64(get_thread(rcx);)
977
978 // get the value of _do_not_unlock_if_synchronized into rdx
979 const Address do_not_unlock_if_synchronized(rthread,
980 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
981 movbool(rbx, do_not_unlock_if_synchronized);
982 movbool(do_not_unlock_if_synchronized, false); // reset the flag
983
984 // get method access flags
985 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
986 movl(rcx, Address(rcx, Method::access_flags_offset()));
987 testl(rcx, JVM_ACC_SYNCHRONIZED);
988 jcc(Assembler::zero, unlocked);
989
990 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
991 // is set.
992 testbool(rbx);
993 jcc(Assembler::notZero, no_unlock);
994
995 // unlock monitor
996 push(state); // save result
997
998 // BasicObjectLock will be first in list, since this is a
999 // synchronized method. However, need to check that the object has
1000 // not been unlocked by an explicit monitorexit bytecode.
1001 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
1002 wordSize - (int) sizeof(BasicObjectLock));
1003 // We use c_rarg1/rdx so that if we go slow path it will be the correct
1004 // register for unlock_object to pass to VM directly
1005 lea(robj, monitor); // address of first monitor
1006
1007 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1008 testptr(rax, rax);
1009 jcc(Assembler::notZero, unlock);
1010
1011 pop(state);
1012 if (throw_monitor_exception) {
1013 // Entry already unlocked, need to throw exception
1014 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1015 call_VM(noreg, CAST_FROM_FN_PTR(address,
1016 InterpreterRuntime::throw_illegal_monitor_state_exception));
1017 should_not_reach_here();
1018 } else {
1019 // Monitor already unlocked during a stack unroll. If requested,
1020 // install an illegal_monitor_state_exception. Continue with
1021 // stack unrolling.
1022 if (install_monitor_exception) {
1023 NOT_LP64(empty_FPU_stack();)
1024 call_VM(noreg, CAST_FROM_FN_PTR(address,
1025 InterpreterRuntime::new_illegal_monitor_state_exception));
1026 }
1027 jmp(unlocked);
1028 }
1029
1030 bind(unlock);
1031 unlock_object(robj);
1032 pop(state);
1033
1034 // Check that for block-structured locking (i.e., that all locked
1035 // objects has been unlocked)
1036 bind(unlocked);
1037
1038 // rax, rdx: Might contain return value
1039
1040 // Check that all monitors are unlocked
1041 {
1042 Label loop, exception, entry, restart;
1043 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1044 const Address monitor_block_top(
1045 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1046 const Address monitor_block_bot(
1047 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1048
1049 bind(restart);
1050 // We use c_rarg1 so that if we go slow path it will be the correct
1051 // register for unlock_object to pass to VM directly
1052 movptr(rmon, monitor_block_top); // points to current entry, starting
1053 // with top-most entry
1054 lea(rbx, monitor_block_bot); // points to word before bottom of
1055 // monitor block
1056 jmp(entry);
1057
1058 // Entry already locked, need to throw exception
1059 bind(exception);
1060
1061 if (throw_monitor_exception) {
1062 // Throw exception
1063 NOT_LP64(empty_FPU_stack();)
1064 MacroAssembler::call_VM(noreg,
1065 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1066 throw_illegal_monitor_state_exception));
1067 should_not_reach_here();
1068 } else {
1069 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1070 // Unlock does not block, so don't have to worry about the frame.
1071 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1072
1073 push(state);
1074 mov(robj, rmon); // nop if robj and rmon are the same
1075 unlock_object(robj);
1076 pop(state);
1077
1078 if (install_monitor_exception) {
1079 NOT_LP64(empty_FPU_stack();)
1080 call_VM(noreg, CAST_FROM_FN_PTR(address,
1081 InterpreterRuntime::
1082 new_illegal_monitor_state_exception));
1083 }
1084
1085 jmp(restart);
1086 }
1087
1088 bind(loop);
1089 // check if current entry is used
1090 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
1091 jcc(Assembler::notEqual, exception);
1092
1093 addptr(rmon, entry_size); // otherwise advance to next entry
1094 bind(entry);
1095 cmpptr(rmon, rbx); // check if bottom reached
1096 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1097 }
1098
1099 bind(no_unlock);
1100
1101 // jvmti support
1102 if (notify_jvmdi) {
1103 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1104 } else {
1105 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1106 }
1107
1108 if (StackReservedPages > 0) {
1109 movptr(rbx,
1110 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1111 // testing if reserved zone needs to be re-enabled
1112 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1113 Label no_reserved_zone_enabling;
1114
1115 NOT_LP64(get_thread(rthread);)
1116
1117 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1118 jcc(Assembler::equal, no_reserved_zone_enabling);
1119
1120 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1121 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1122
1123 call_VM_leaf(
1124 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1125 call_VM(noreg, CAST_FROM_FN_PTR(address,
1126 InterpreterRuntime::throw_delayed_StackOverflowError));
1127 should_not_reach_here();
1128
1129 bind(no_reserved_zone_enabling);
1130 }
1131
1132 if (ValueTypesBufferMaxMemory > 0) {
1133 // Code below is taking care of recycling TLVB memory, no safepoint should
1134 // occur between this point and the end of the remove_activation() method
1135 Label vtbuffer_slow, vtbuffer_done, no_buffered_value_returned;
1136 const Register thread1 = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1137 const uintptr_t chunk_mask = VTBufferChunk::chunk_mask();
1138 NOT_LP64(get_thread(thread1));
1139 cmpptr(Address(thread1, JavaThread::return_buffered_value_offset()), (intptr_t)NULL_WORD);
1140 jcc(Assembler::equal, no_buffered_value_returned);
1141 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1142 call_VM_leaf(CAST_FROM_FN_PTR(address,
1143 InterpreterRuntime::return_value_step2), rax, rbx);
1144 NOT_LP64(get_thread(thread1));
1145 get_vm_result(rax, thread1);
1146 jmp(vtbuffer_done);
1147 bind(no_buffered_value_returned);
1148 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1149 NOT_LP64(get_thread(thread1));
1150 movptr(rcx, Address(thread1, JavaThread::vt_alloc_ptr_offset()));
1151 cmpptr(rbx, rcx);
1152 jcc(Assembler::equal, vtbuffer_done);
1153 andptr(rbx, chunk_mask);
1154 andptr(rcx, chunk_mask);
1155 cmpptr(rbx, rcx);
1156 jcc(Assembler::notEqual, vtbuffer_slow);
1157 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1158 movptr(Address(thread1, JavaThread::vt_alloc_ptr_offset()), rbx);
1159 jmp(vtbuffer_done);
1160 bind(vtbuffer_slow);
1161 push(state);
1162 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize));
1163 call_VM_leaf(CAST_FROM_FN_PTR(address,
1164 InterpreterRuntime::recycle_vtbuffer), rbx);
1165 pop(state);
1166 bind(vtbuffer_done);
1167 }
1168
1169 // remove activation
1170 // get sender sp
1171 movptr(rbx,
1172 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1173
1174 if (load_values) {
1175 // We are returning a value type, load its fields into registers
1176 #ifndef _LP64
1177 super_call_VM_leaf(StubRoutines::load_value_type_fields_in_regs());
1178 #else
1179 load_klass(rdi, rax);
1180 movptr(rdi, Address(rdi, ValueKlass::unpack_handler_offset()));
1181
1182 Label skip;
1183 testptr(rdi, rdi);
1184 jcc(Assembler::equal, skip);
1185
1186 // Load fields from a buffered value with a value class specific
1187 // handler
1188 call(rdi);
1189
1190 bind(skip);
1191 #endif
1192 // call above kills the value in rbx. Reload it.
1193 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1194 }
1195 leave(); // remove frame anchor
1196 pop(ret_addr); // get return address
1197 mov(rsp, rbx); // set sp to sender sp
1198 }
1199
1200 void InterpreterMacroAssembler::get_method_counters(Register method,
1201 Register mcs, Label& skip) {
1202 Label has_counters;
1203 movptr(mcs, Address(method, Method::method_counters_offset()));
1204 testptr(mcs, mcs);
1205 jcc(Assembler::notZero, has_counters);
1206 call_VM(noreg, CAST_FROM_FN_PTR(address,
1207 InterpreterRuntime::build_method_counters), method);
1208 movptr(mcs, Address(method,Method::method_counters_offset()));
1209 testptr(mcs, mcs);
1210 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1211 bind(has_counters);
1212 }
1213
1214
1215 // Lock object
1216 //
1217 // Args:
1218 // rdx, c_rarg1: BasicObjectLock to be used for locking
1219 //
1220 // Kills:
1221 // rax, rbx
1222 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1223 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1224 "The argument is only for looks. It must be c_rarg1");
1225
1226 if (UseHeavyMonitors) {
1227 call_VM(noreg,
1228 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1229 lock_reg);
1230 } else {
1231 Label done;
1232
1233 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1234 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1235 // problematic case where tmp_reg = no_reg.
1236 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1237
1238 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1239 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1240 const int mark_offset = lock_offset +
1241 BasicLock::displaced_header_offset_in_bytes();
1242
1243 Label slow_case;
1244
1245 // Load object pointer into obj_reg
1246 movptr(obj_reg, Address(lock_reg, obj_offset));
1247
1248 if (UseBiasedLocking) {
1249 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1250 }
1251
1252 // Load immediate 1 into swap_reg %rax
1253 movl(swap_reg, (int32_t)1);
1254
1255 // Load (object->mark() | 1) into swap_reg %rax
1256 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1257 if (EnableValhalla && !UseBiasedLocking) {
1258 // For slow path is_always_locked, using biased, which is never natural for !UseBiasLocking
1259 andptr(swap_reg, ~markOopDesc::biased_lock_bit_in_place);
1260 }
1261
1262 // Save (object->mark() | 1) into BasicLock's displaced header
1263 movptr(Address(lock_reg, mark_offset), swap_reg);
1264
1265 assert(lock_offset == 0,
1266 "displaced header must be first word in BasicObjectLock");
1267
1268 if (os::is_MP()) lock();
1269 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1270 if (PrintBiasedLockingStatistics) {
1271 cond_inc32(Assembler::zero,
1272 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1273 }
1274 jcc(Assembler::zero, done);
1275
1276 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1277
1278 // Test if the oopMark is an obvious stack pointer, i.e.,
1279 // 1) (mark & zero_bits) == 0, and
1280 // 2) rsp <= mark < mark + os::pagesize()
1281 //
1282 // These 3 tests can be done by evaluating the following
1283 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1284 // assuming both stack pointer and pagesize have their
1285 // least significant bits clear.
1286 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1287 subptr(swap_reg, rsp);
1288 andptr(swap_reg, zero_bits - os::vm_page_size());
1289
1290 // Save the test result, for recursive case, the result is zero
1291 movptr(Address(lock_reg, mark_offset), swap_reg);
1292
1293 if (PrintBiasedLockingStatistics) {
1294 cond_inc32(Assembler::zero,
1295 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1296 }
1297 jcc(Assembler::zero, done);
1298
1299 bind(slow_case);
1300
1301 // Call the runtime routine for slow case
1302 call_VM(noreg,
1303 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1304 lock_reg);
1305
1306 bind(done);
1307 }
1308 }
1309
1310
1311 // Unlocks an object. Used in monitorexit bytecode and
1312 // remove_activation. Throws an IllegalMonitorException if object is
1313 // not locked by current thread.
1314 //
1315 // Args:
1316 // rdx, c_rarg1: BasicObjectLock for lock
1317 //
1318 // Kills:
1319 // rax
1320 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1321 // rscratch1 (scratch reg)
1322 // rax, rbx, rcx, rdx
1323 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1324 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1325 "The argument is only for looks. It must be c_rarg1");
1326
1327 if (UseHeavyMonitors) {
1328 call_VM(noreg,
1329 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1330 lock_reg);
1331 } else {
1332 Label done;
1333
1334 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1335 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1336 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1337
1338 save_bcp(); // Save in case of exception
1339
1340 // Convert from BasicObjectLock structure to object and BasicLock
1341 // structure Store the BasicLock address into %rax
1342 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1343
1344 // Load oop into obj_reg(%c_rarg3)
1345 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1346
1347 // Free entry
1348 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1349
1350 if (UseBiasedLocking) {
1351 biased_locking_exit(obj_reg, header_reg, done);
1352 }
1353
1354 // Load the old header from BasicLock structure
1355 movptr(header_reg, Address(swap_reg,
1356 BasicLock::displaced_header_offset_in_bytes()));
1357
1358 // Test for recursion
1359 testptr(header_reg, header_reg);
1360
1361 // zero for recursive case
1362 jcc(Assembler::zero, done);
1363
1364 // Atomic swap back the old header
1365 if (os::is_MP()) lock();
1366 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1367
1368 // zero for simple unlock of a stack-lock case
1369 jcc(Assembler::zero, done);
1370
1371 // Call the runtime routine for slow case.
1372 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1373 obj_reg); // restore obj
1374 call_VM(noreg,
1375 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1376 lock_reg);
1377
1378 bind(done);
1379
1380 restore_bcp();
1381 }
1382 }
1383
1384 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1385 Label& zero_continue) {
1386 assert(ProfileInterpreter, "must be profiling interpreter");
1387 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1388 testptr(mdp, mdp);
1389 jcc(Assembler::zero, zero_continue);
1390 }
1391
1392
1393 // Set the method data pointer for the current bcp.
1394 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1395 assert(ProfileInterpreter, "must be profiling interpreter");
1396 Label set_mdp;
1397 push(rax);
1398 push(rbx);
1399
1400 get_method(rbx);
1401 // Test MDO to avoid the call if it is NULL.
1402 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1403 testptr(rax, rax);
1404 jcc(Assembler::zero, set_mdp);
1405 // rbx: method
1406 // _bcp_register: bcp
1407 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1408 // rax: mdi
1409 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1410 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1411 addptr(rbx, in_bytes(MethodData::data_offset()));
1412 addptr(rax, rbx);
1413 bind(set_mdp);
1414 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1415 pop(rbx);
1416 pop(rax);
1417 }
1418
1419 void InterpreterMacroAssembler::verify_method_data_pointer() {
1420 assert(ProfileInterpreter, "must be profiling interpreter");
1421 #ifdef ASSERT
1422 Label verify_continue;
1423 push(rax);
1424 push(rbx);
1425 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1426 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1427 push(arg3_reg);
1428 push(arg2_reg);
1429 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1430 get_method(rbx);
1431
1432 // If the mdp is valid, it will point to a DataLayout header which is
1433 // consistent with the bcp. The converse is highly probable also.
1434 load_unsigned_short(arg2_reg,
1435 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1436 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1437 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1438 cmpptr(arg2_reg, _bcp_register);
1439 jcc(Assembler::equal, verify_continue);
1440 // rbx: method
1441 // _bcp_register: bcp
1442 // c_rarg3: mdp
1443 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1444 rbx, _bcp_register, arg3_reg);
1445 bind(verify_continue);
1446 pop(arg2_reg);
1447 pop(arg3_reg);
1448 pop(rbx);
1449 pop(rax);
1450 #endif // ASSERT
1451 }
1452
1453
1454 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1455 int constant,
1456 Register value) {
1457 assert(ProfileInterpreter, "must be profiling interpreter");
1458 Address data(mdp_in, constant);
1459 movptr(data, value);
1460 }
1461
1462
1463 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1464 int constant,
1465 bool decrement) {
1466 // Counter address
1467 Address data(mdp_in, constant);
1468
1469 increment_mdp_data_at(data, decrement);
1470 }
1471
1472 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1473 bool decrement) {
1474 assert(ProfileInterpreter, "must be profiling interpreter");
1475 // %%% this does 64bit counters at best it is wasting space
1476 // at worst it is a rare bug when counters overflow
1477
1478 if (decrement) {
1479 // Decrement the register. Set condition codes.
1480 addptr(data, (int32_t) -DataLayout::counter_increment);
1481 // If the decrement causes the counter to overflow, stay negative
1482 Label L;
1483 jcc(Assembler::negative, L);
1484 addptr(data, (int32_t) DataLayout::counter_increment);
1485 bind(L);
1486 } else {
1487 assert(DataLayout::counter_increment == 1,
1488 "flow-free idiom only works with 1");
1489 // Increment the register. Set carry flag.
1490 addptr(data, DataLayout::counter_increment);
1491 // If the increment causes the counter to overflow, pull back by 1.
1492 sbbptr(data, (int32_t)0);
1493 }
1494 }
1495
1496
1497 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1498 Register reg,
1499 int constant,
1500 bool decrement) {
1501 Address data(mdp_in, reg, Address::times_1, constant);
1502
1503 increment_mdp_data_at(data, decrement);
1504 }
1505
1506 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1507 int flag_byte_constant) {
1508 assert(ProfileInterpreter, "must be profiling interpreter");
1509 int header_offset = in_bytes(DataLayout::header_offset());
1510 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1511 // Set the flag
1512 orl(Address(mdp_in, header_offset), header_bits);
1513 }
1514
1515
1516
1517 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1518 int offset,
1519 Register value,
1520 Register test_value_out,
1521 Label& not_equal_continue) {
1522 assert(ProfileInterpreter, "must be profiling interpreter");
1523 if (test_value_out == noreg) {
1524 cmpptr(value, Address(mdp_in, offset));
1525 } else {
1526 // Put the test value into a register, so caller can use it:
1527 movptr(test_value_out, Address(mdp_in, offset));
1528 cmpptr(test_value_out, value);
1529 }
1530 jcc(Assembler::notEqual, not_equal_continue);
1531 }
1532
1533
1534 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1535 int offset_of_disp) {
1536 assert(ProfileInterpreter, "must be profiling interpreter");
1537 Address disp_address(mdp_in, offset_of_disp);
1538 addptr(mdp_in, disp_address);
1539 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1540 }
1541
1542
1543 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1544 Register reg,
1545 int offset_of_disp) {
1546 assert(ProfileInterpreter, "must be profiling interpreter");
1547 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1548 addptr(mdp_in, disp_address);
1549 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1550 }
1551
1552
1553 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1554 int constant) {
1555 assert(ProfileInterpreter, "must be profiling interpreter");
1556 addptr(mdp_in, constant);
1557 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1558 }
1559
1560
1561 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1562 assert(ProfileInterpreter, "must be profiling interpreter");
1563 push(return_bci); // save/restore across call_VM
1564 call_VM(noreg,
1565 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1566 return_bci);
1567 pop(return_bci);
1568 }
1569
1570
1571 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1572 Register bumped_count) {
1573 if (ProfileInterpreter) {
1574 Label profile_continue;
1575
1576 // If no method data exists, go to profile_continue.
1577 // Otherwise, assign to mdp
1578 test_method_data_pointer(mdp, profile_continue);
1579
1580 // We are taking a branch. Increment the taken count.
1581 // We inline increment_mdp_data_at to return bumped_count in a register
1582 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1583 Address data(mdp, in_bytes(JumpData::taken_offset()));
1584 movptr(bumped_count, data);
1585 assert(DataLayout::counter_increment == 1,
1586 "flow-free idiom only works with 1");
1587 addptr(bumped_count, DataLayout::counter_increment);
1588 sbbptr(bumped_count, 0);
1589 movptr(data, bumped_count); // Store back out
1590
1591 // The method data pointer needs to be updated to reflect the new target.
1592 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1593 bind(profile_continue);
1594 }
1595 }
1596
1597
1598 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1599 if (ProfileInterpreter) {
1600 Label profile_continue;
1601
1602 // If no method data exists, go to profile_continue.
1603 test_method_data_pointer(mdp, profile_continue);
1604
1605 // We are taking a branch. Increment the not taken count.
1606 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1607
1608 // The method data pointer needs to be updated to correspond to
1609 // the next bytecode
1610 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1611 bind(profile_continue);
1612 }
1613 }
1614
1615 void InterpreterMacroAssembler::profile_call(Register mdp) {
1616 if (ProfileInterpreter) {
1617 Label profile_continue;
1618
1619 // If no method data exists, go to profile_continue.
1620 test_method_data_pointer(mdp, profile_continue);
1621
1622 // We are making a call. Increment the count.
1623 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1624
1625 // The method data pointer needs to be updated to reflect the new target.
1626 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1627 bind(profile_continue);
1628 }
1629 }
1630
1631
1632 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1633 if (ProfileInterpreter) {
1634 Label profile_continue;
1635
1636 // If no method data exists, go to profile_continue.
1637 test_method_data_pointer(mdp, profile_continue);
1638
1639 // We are making a call. Increment the count.
1640 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1641
1642 // The method data pointer needs to be updated to reflect the new target.
1643 update_mdp_by_constant(mdp,
1644 in_bytes(VirtualCallData::
1645 virtual_call_data_size()));
1646 bind(profile_continue);
1647 }
1648 }
1649
1650
1651 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1652 Register mdp,
1653 Register reg2,
1654 bool receiver_can_be_null) {
1655 if (ProfileInterpreter) {
1656 Label profile_continue;
1657
1658 // If no method data exists, go to profile_continue.
1659 test_method_data_pointer(mdp, profile_continue);
1660
1661 Label skip_receiver_profile;
1662 if (receiver_can_be_null) {
1663 Label not_null;
1664 testptr(receiver, receiver);
1665 jccb(Assembler::notZero, not_null);
1666 // We are making a call. Increment the count for null receiver.
1667 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1668 jmp(skip_receiver_profile);
1669 bind(not_null);
1670 }
1671
1672 // Record the receiver type.
1673 record_klass_in_profile(receiver, mdp, reg2, true);
1674 bind(skip_receiver_profile);
1675
1676 // The method data pointer needs to be updated to reflect the new target.
1677 #if INCLUDE_JVMCI
1678 if (MethodProfileWidth == 0) {
1679 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1680 }
1681 #else // INCLUDE_JVMCI
1682 update_mdp_by_constant(mdp,
1683 in_bytes(VirtualCallData::
1684 virtual_call_data_size()));
1685 #endif // INCLUDE_JVMCI
1686 bind(profile_continue);
1687 }
1688 }
1689
1690 #if INCLUDE_JVMCI
1691 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1692 assert_different_registers(method, mdp, reg2);
1693 if (ProfileInterpreter && MethodProfileWidth > 0) {
1694 Label profile_continue;
1695
1696 // If no method data exists, go to profile_continue.
1697 test_method_data_pointer(mdp, profile_continue);
1698
1699 Label done;
1700 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1701 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1702 bind(done);
1703
1704 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1705 bind(profile_continue);
1706 }
1707 }
1708 #endif // INCLUDE_JVMCI
1709
1710 // This routine creates a state machine for updating the multi-row
1711 // type profile at a virtual call site (or other type-sensitive bytecode).
1712 // The machine visits each row (of receiver/count) until the receiver type
1713 // is found, or until it runs out of rows. At the same time, it remembers
1714 // the location of the first empty row. (An empty row records null for its
1715 // receiver, and can be allocated for a newly-observed receiver type.)
1716 // Because there are two degrees of freedom in the state, a simple linear
1717 // search will not work; it must be a decision tree. Hence this helper
1718 // function is recursive, to generate the required tree structured code.
1719 // It's the interpreter, so we are trading off code space for speed.
1720 // See below for example code.
1721 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1722 Register receiver, Register mdp,
1723 Register reg2, int start_row,
1724 Label& done, bool is_virtual_call) {
1725 if (TypeProfileWidth == 0) {
1726 if (is_virtual_call) {
1727 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1728 }
1729 #if INCLUDE_JVMCI
1730 else if (EnableJVMCI) {
1731 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1732 }
1733 #endif // INCLUDE_JVMCI
1734 } else {
1735 int non_profiled_offset = -1;
1736 if (is_virtual_call) {
1737 non_profiled_offset = in_bytes(CounterData::count_offset());
1738 }
1739 #if INCLUDE_JVMCI
1740 else if (EnableJVMCI) {
1741 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1742 }
1743 #endif // INCLUDE_JVMCI
1744
1745 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1746 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1747 }
1748 }
1749
1750 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1751 Register reg2, int start_row, Label& done, int total_rows,
1752 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1753 int non_profiled_offset) {
1754 int last_row = total_rows - 1;
1755 assert(start_row <= last_row, "must be work left to do");
1756 // Test this row for both the item and for null.
1757 // Take any of three different outcomes:
1758 // 1. found item => increment count and goto done
1759 // 2. found null => keep looking for case 1, maybe allocate this cell
1760 // 3. found something else => keep looking for cases 1 and 2
1761 // Case 3 is handled by a recursive call.
1762 for (int row = start_row; row <= last_row; row++) {
1763 Label next_test;
1764 bool test_for_null_also = (row == start_row);
1765
1766 // See if the item is item[n].
1767 int item_offset = in_bytes(item_offset_fn(row));
1768 test_mdp_data_at(mdp, item_offset, item,
1769 (test_for_null_also ? reg2 : noreg),
1770 next_test);
1771 // (Reg2 now contains the item from the CallData.)
1772
1773 // The item is item[n]. Increment count[n].
1774 int count_offset = in_bytes(item_count_offset_fn(row));
1775 increment_mdp_data_at(mdp, count_offset);
1776 jmp(done);
1777 bind(next_test);
1778
1779 if (test_for_null_also) {
1780 Label found_null;
1781 // Failed the equality check on item[n]... Test for null.
1782 testptr(reg2, reg2);
1783 if (start_row == last_row) {
1784 // The only thing left to do is handle the null case.
1785 if (non_profiled_offset >= 0) {
1786 jccb(Assembler::zero, found_null);
1787 // Item did not match any saved item and there is no empty row for it.
1788 // Increment total counter to indicate polymorphic case.
1789 increment_mdp_data_at(mdp, non_profiled_offset);
1790 jmp(done);
1791 bind(found_null);
1792 } else {
1793 jcc(Assembler::notZero, done);
1794 }
1795 break;
1796 }
1797 // Since null is rare, make it be the branch-taken case.
1798 jcc(Assembler::zero, found_null);
1799
1800 // Put all the "Case 3" tests here.
1801 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1802 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1803
1804 // Found a null. Keep searching for a matching item,
1805 // but remember that this is an empty (unused) slot.
1806 bind(found_null);
1807 }
1808 }
1809
1810 // In the fall-through case, we found no matching item, but we
1811 // observed the item[start_row] is NULL.
1812
1813 // Fill in the item field and increment the count.
1814 int item_offset = in_bytes(item_offset_fn(start_row));
1815 set_mdp_data_at(mdp, item_offset, item);
1816 int count_offset = in_bytes(item_count_offset_fn(start_row));
1817 movl(reg2, DataLayout::counter_increment);
1818 set_mdp_data_at(mdp, count_offset, reg2);
1819 if (start_row > 0) {
1820 jmp(done);
1821 }
1822 }
1823
1824 // Example state machine code for three profile rows:
1825 // // main copy of decision tree, rooted at row[1]
1826 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1827 // if (row[0].rec != NULL) {
1828 // // inner copy of decision tree, rooted at row[1]
1829 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1830 // if (row[1].rec != NULL) {
1831 // // degenerate decision tree, rooted at row[2]
1832 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1833 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1834 // row[2].init(rec); goto done;
1835 // } else {
1836 // // remember row[1] is empty
1837 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1838 // row[1].init(rec); goto done;
1839 // }
1840 // } else {
1841 // // remember row[0] is empty
1842 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1843 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1844 // row[0].init(rec); goto done;
1845 // }
1846 // done:
1847
1848 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1849 Register mdp, Register reg2,
1850 bool is_virtual_call) {
1851 assert(ProfileInterpreter, "must be profiling");
1852 Label done;
1853
1854 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1855
1856 bind (done);
1857 }
1858
1859 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1860 Register mdp) {
1861 if (ProfileInterpreter) {
1862 Label profile_continue;
1863 uint row;
1864
1865 // If no method data exists, go to profile_continue.
1866 test_method_data_pointer(mdp, profile_continue);
1867
1868 // Update the total ret count.
1869 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1870
1871 for (row = 0; row < RetData::row_limit(); row++) {
1872 Label next_test;
1873
1874 // See if return_bci is equal to bci[n]:
1875 test_mdp_data_at(mdp,
1876 in_bytes(RetData::bci_offset(row)),
1877 return_bci, noreg,
1878 next_test);
1879
1880 // return_bci is equal to bci[n]. Increment the count.
1881 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1882
1883 // The method data pointer needs to be updated to reflect the new target.
1884 update_mdp_by_offset(mdp,
1885 in_bytes(RetData::bci_displacement_offset(row)));
1886 jmp(profile_continue);
1887 bind(next_test);
1888 }
1889
1890 update_mdp_for_ret(return_bci);
1891
1892 bind(profile_continue);
1893 }
1894 }
1895
1896
1897 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1898 if (ProfileInterpreter) {
1899 Label profile_continue;
1900
1901 // If no method data exists, go to profile_continue.
1902 test_method_data_pointer(mdp, profile_continue);
1903
1904 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1905
1906 // The method data pointer needs to be updated.
1907 int mdp_delta = in_bytes(BitData::bit_data_size());
1908 if (TypeProfileCasts) {
1909 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1910 }
1911 update_mdp_by_constant(mdp, mdp_delta);
1912
1913 bind(profile_continue);
1914 }
1915 }
1916
1917
1918 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1919 if (ProfileInterpreter && TypeProfileCasts) {
1920 Label profile_continue;
1921
1922 // If no method data exists, go to profile_continue.
1923 test_method_data_pointer(mdp, profile_continue);
1924
1925 int count_offset = in_bytes(CounterData::count_offset());
1926 // Back up the address, since we have already bumped the mdp.
1927 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1928
1929 // *Decrement* the counter. We expect to see zero or small negatives.
1930 increment_mdp_data_at(mdp, count_offset, true);
1931
1932 bind (profile_continue);
1933 }
1934 }
1935
1936
1937 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1938 if (ProfileInterpreter) {
1939 Label profile_continue;
1940
1941 // If no method data exists, go to profile_continue.
1942 test_method_data_pointer(mdp, profile_continue);
1943
1944 // The method data pointer needs to be updated.
1945 int mdp_delta = in_bytes(BitData::bit_data_size());
1946 if (TypeProfileCasts) {
1947 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1948
1949 // Record the object type.
1950 record_klass_in_profile(klass, mdp, reg2, false);
1951 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1952 NOT_LP64(restore_locals();) // Restore EDI
1953 }
1954 update_mdp_by_constant(mdp, mdp_delta);
1955
1956 bind(profile_continue);
1957 }
1958 }
1959
1960
1961 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1962 if (ProfileInterpreter) {
1963 Label profile_continue;
1964
1965 // If no method data exists, go to profile_continue.
1966 test_method_data_pointer(mdp, profile_continue);
1967
1968 // Update the default case count
1969 increment_mdp_data_at(mdp,
1970 in_bytes(MultiBranchData::default_count_offset()));
1971
1972 // The method data pointer needs to be updated.
1973 update_mdp_by_offset(mdp,
1974 in_bytes(MultiBranchData::
1975 default_displacement_offset()));
1976
1977 bind(profile_continue);
1978 }
1979 }
1980
1981
1982 void InterpreterMacroAssembler::profile_switch_case(Register index,
1983 Register mdp,
1984 Register reg2) {
1985 if (ProfileInterpreter) {
1986 Label profile_continue;
1987
1988 // If no method data exists, go to profile_continue.
1989 test_method_data_pointer(mdp, profile_continue);
1990
1991 // Build the base (index * per_case_size_in_bytes()) +
1992 // case_array_offset_in_bytes()
1993 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1994 imulptr(index, reg2); // XXX l ?
1995 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1996
1997 // Update the case count
1998 increment_mdp_data_at(mdp,
1999 index,
2000 in_bytes(MultiBranchData::relative_count_offset()));
2001
2002 // The method data pointer needs to be updated.
2003 update_mdp_by_offset(mdp,
2004 index,
2005 in_bytes(MultiBranchData::
2006 relative_displacement_offset()));
2007
2008 bind(profile_continue);
2009 }
2010 }
2011
2012
2013
2014 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
2015 if (state == atos) {
2016 MacroAssembler::verify_oop(reg);
2017 }
2018 }
2019
2020 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
2021 #ifndef _LP64
2022 if ((state == ftos && UseSSE < 1) ||
2023 (state == dtos && UseSSE < 2)) {
2024 MacroAssembler::verify_FPU(stack_depth);
2025 }
2026 #endif
2027 }
2028
2029 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
2030 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
2031 int increment, Address mask,
2032 Register scratch, bool preloaded,
2033 Condition cond, Label* where) {
2034 if (!preloaded) {
2035 movl(scratch, counter_addr);
2036 }
2037 incrementl(scratch, increment);
2038 movl(counter_addr, scratch);
2039 andl(scratch, mask);
2040 jcc(cond, *where);
2041 }
2042
2043 void InterpreterMacroAssembler::notify_method_entry() {
2044 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2045 // track stack depth. If it is possible to enter interp_only_mode we add
2046 // the code to check if the event should be sent.
2047 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2048 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2049 if (JvmtiExport::can_post_interpreter_events()) {
2050 Label L;
2051 NOT_LP64(get_thread(rthread);)
2052 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2053 testl(rdx, rdx);
2054 jcc(Assembler::zero, L);
2055 call_VM(noreg, CAST_FROM_FN_PTR(address,
2056 InterpreterRuntime::post_method_entry));
2057 bind(L);
2058 }
2059
2060 {
2061 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2062 NOT_LP64(get_thread(rthread);)
2063 get_method(rarg);
2064 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2065 rthread, rarg);
2066 }
2067
2068 // RedefineClasses() tracing support for obsolete method entry
2069 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2070 NOT_LP64(get_thread(rthread);)
2071 get_method(rarg);
2072 call_VM_leaf(
2073 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2074 rthread, rarg);
2075 }
2076 }
2077
2078
2079 void InterpreterMacroAssembler::notify_method_exit(
2080 TosState state, NotifyMethodExitMode mode) {
2081 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2082 // track stack depth. If it is possible to enter interp_only_mode we add
2083 // the code to check if the event should be sent.
2084 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2085 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2086 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2087 Label L;
2088 // Note: frame::interpreter_frame_result has a dependency on how the
2089 // method result is saved across the call to post_method_exit. If this
2090 // is changed then the interpreter_frame_result implementation will
2091 // need to be updated too.
2092
2093 // template interpreter will leave the result on the top of the stack.
2094 push(state);
2095 NOT_LP64(get_thread(rthread);)
2096 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2097 testl(rdx, rdx);
2098 jcc(Assembler::zero, L);
2099 call_VM(noreg,
2100 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2101 bind(L);
2102 pop(state);
2103 }
2104
2105 {
2106 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2107 push(state);
2108 NOT_LP64(get_thread(rthread);)
2109 get_method(rarg);
2110 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2111 rthread, rarg);
2112 pop(state);
2113 }
2114 }