1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "oops/valueKlass.hpp"
35 #include "prims/jvmtiExport.hpp"
36 #include "prims/jvmtiThreadState.hpp"
37 #include "runtime/basicLock.hpp"
38 #include "runtime/biasedLocking.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/safepointMechanism.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/thread.inline.hpp"
43
44 // Implementation of InterpreterMacroAssembler
45
46 void InterpreterMacroAssembler::jump_to_entry(address entry) {
47 assert(entry, "Entry must have been generated by now");
48 jump(RuntimeAddress(entry));
49 }
50
51 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
52 Label update, next, none;
53
54 verify_oop(obj);
55
56 testptr(obj, obj);
57 jccb(Assembler::notZero, update);
58 orptr(mdo_addr, TypeEntries::null_seen);
59 jmpb(next);
60
61 bind(update);
62 load_klass(obj, obj);
63
64 xorptr(obj, mdo_addr);
65 testptr(obj, TypeEntries::type_klass_mask);
66 jccb(Assembler::zero, next); // klass seen before, nothing to
67 // do. The unknown bit may have been
68 // set already but no need to check.
69
70 testptr(obj, TypeEntries::type_unknown);
71 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
72
73 cmpptr(mdo_addr, 0);
74 jccb(Assembler::equal, none);
75 cmpptr(mdo_addr, TypeEntries::null_seen);
76 jccb(Assembler::equal, none);
77 // There is a chance that the checks above (re-reading profiling
78 // data from memory) fail if another thread has just set the
79 // profiling to this obj's klass
80 xorptr(obj, mdo_addr);
81 testptr(obj, TypeEntries::type_klass_mask);
82 jccb(Assembler::zero, next);
83
84 // different than before. Cannot keep accurate profile.
85 orptr(mdo_addr, TypeEntries::type_unknown);
86 jmpb(next);
87
88 bind(none);
89 // first time here. Set profile type.
90 movptr(mdo_addr, obj);
91
92 bind(next);
93 }
94
95 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
96 if (!ProfileInterpreter) {
97 return;
98 }
99
100 if (MethodData::profile_arguments() || MethodData::profile_return()) {
101 Label profile_continue;
102
103 test_method_data_pointer(mdp, profile_continue);
104
105 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
106
107 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
108 jcc(Assembler::notEqual, profile_continue);
109
110 if (MethodData::profile_arguments()) {
111 Label done;
112 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
113 addptr(mdp, off_to_args);
114
115 for (int i = 0; i < TypeProfileArgsLimit; i++) {
116 if (i > 0 || MethodData::profile_return()) {
117 // If return value type is profiled we may have no argument to profile
118 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
119 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
120 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
121 jcc(Assembler::less, done);
122 }
123 movptr(tmp, Address(callee, Method::const_offset()));
124 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
125 // stack offset o (zero based) from the start of the argument
126 // list, for n arguments translates into offset n - o - 1 from
127 // the end of the argument list
128 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
129 subl(tmp, 1);
130 Address arg_addr = argument_address(tmp);
131 movptr(tmp, arg_addr);
132
133 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
134 profile_obj_type(tmp, mdo_arg_addr);
135
136 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
137 addptr(mdp, to_add);
138 off_to_args += to_add;
139 }
140
141 if (MethodData::profile_return()) {
142 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
143 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
144 }
145
146 bind(done);
147
148 if (MethodData::profile_return()) {
149 // We're right after the type profile for the last
150 // argument. tmp is the number of cells left in the
151 // CallTypeData/VirtualCallTypeData to reach its end. Non null
152 // if there's a return to profile.
153 assert(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;
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;
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, Register tmp) {
507 assert_different_registers(result, index);
508
509 get_constant_pool(result);
510 // load pointer for resolved_references[] objArray
511 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
512 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
513 resolve_oop_handle(result, tmp);
514 load_heap_oop(result, Address(result, index,
515 UseCompressedOops ? Address::times_4 : Address::times_ptr,
516 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
517 }
518
519 // load cpool->resolved_klass_at(index)
520 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool,
521 Register index, Register klass) {
522 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
523 Register resolved_klasses = cpool;
524 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
525 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
526 }
527
528 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
529 // subtype of super_klass.
530 //
531 // Args:
532 // rax: superklass
533 // Rsub_klass: subklass
534 //
535 // Kills:
536 // rcx, rdi
537 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
538 Label& ok_is_subtype) {
539 assert(Rsub_klass != rax, "rax holds superklass");
540 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
541 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
542 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
543 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
544
545 // Profile the not-null value's klass.
546 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
547
548 // Do the check.
549 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
550
551 // Profile the failure of the check.
552 profile_typecheck_failed(rcx); // blows rcx
553 }
554
555
556 #ifndef _LP64
557 void InterpreterMacroAssembler::f2ieee() {
558 if (IEEEPrecision) {
559 fstp_s(Address(rsp, 0));
560 fld_s(Address(rsp, 0));
561 }
562 }
563
564
565 void InterpreterMacroAssembler::d2ieee() {
566 if (IEEEPrecision) {
567 fstp_d(Address(rsp, 0));
568 fld_d(Address(rsp, 0));
569 }
570 }
571 #endif // _LP64
572
573 // Java Expression Stack
574
575 void InterpreterMacroAssembler::pop_ptr(Register r) {
576 pop(r);
577 }
578
579 void InterpreterMacroAssembler::push_ptr(Register r) {
580 push(r);
581 }
582
583 void InterpreterMacroAssembler::push_i(Register r) {
584 push(r);
585 }
586
587 void InterpreterMacroAssembler::push_f(XMMRegister r) {
588 subptr(rsp, wordSize);
589 movflt(Address(rsp, 0), r);
590 }
591
592 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
593 movflt(r, Address(rsp, 0));
594 addptr(rsp, wordSize);
595 }
596
597 void InterpreterMacroAssembler::push_d(XMMRegister r) {
598 subptr(rsp, 2 * wordSize);
599 movdbl(Address(rsp, 0), r);
600 }
601
602 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
603 movdbl(r, Address(rsp, 0));
604 addptr(rsp, 2 * Interpreter::stackElementSize);
605 }
606
607 #ifdef _LP64
608 void InterpreterMacroAssembler::pop_i(Register r) {
609 // XXX can't use pop currently, upper half non clean
610 movl(r, Address(rsp, 0));
611 addptr(rsp, wordSize);
612 }
613
614 void InterpreterMacroAssembler::pop_l(Register r) {
615 movq(r, Address(rsp, 0));
616 addptr(rsp, 2 * Interpreter::stackElementSize);
617 }
618
619 void InterpreterMacroAssembler::push_l(Register r) {
620 subptr(rsp, 2 * wordSize);
621 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
622 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
623 }
624
625 void InterpreterMacroAssembler::pop(TosState state) {
626 switch (state) {
627 case atos: pop_ptr(); break;
628 case btos:
629 case ztos:
630 case ctos:
631 case stos:
632 case itos: pop_i(); break;
633 case ltos: pop_l(); break;
634 case ftos: pop_f(xmm0); break;
635 case dtos: pop_d(xmm0); break;
636 case vtos: /* nothing to do */ break;
637 default: ShouldNotReachHere();
638 }
639 verify_oop(rax, state);
640 }
641
642 void InterpreterMacroAssembler::push(TosState state) {
643 verify_oop(rax, state);
644 switch (state) {
645 case atos: push_ptr(); break;
646 case btos:
647 case ztos:
648 case ctos:
649 case stos:
650 case itos: push_i(); break;
651 case ltos: push_l(); break;
652 case ftos: push_f(xmm0); break;
653 case dtos: push_d(xmm0); break;
654 case vtos: /* nothing to do */ break;
655 default : ShouldNotReachHere();
656 }
657 }
658 #else
659 void InterpreterMacroAssembler::pop_i(Register r) {
660 pop(r);
661 }
662
663 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
664 pop(lo);
665 pop(hi);
666 }
667
668 void InterpreterMacroAssembler::pop_f() {
669 fld_s(Address(rsp, 0));
670 addptr(rsp, 1 * wordSize);
671 }
672
673 void InterpreterMacroAssembler::pop_d() {
674 fld_d(Address(rsp, 0));
675 addptr(rsp, 2 * wordSize);
676 }
677
678
679 void InterpreterMacroAssembler::pop(TosState state) {
680 switch (state) {
681 case atos: pop_ptr(rax); break;
682 case btos: // fall through
683 case ztos: // fall through
684 case ctos: // fall through
685 case stos: // fall through
686 case itos: pop_i(rax); break;
687 case ltos: pop_l(rax, rdx); break;
688 case ftos:
689 if (UseSSE >= 1) {
690 pop_f(xmm0);
691 } else {
692 pop_f();
693 }
694 break;
695 case dtos:
696 if (UseSSE >= 2) {
697 pop_d(xmm0);
698 } else {
699 pop_d();
700 }
701 break;
702 case vtos: /* nothing to do */ break;
703 default : ShouldNotReachHere();
704 }
705 verify_oop(rax, state);
706 }
707
708
709 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
710 push(hi);
711 push(lo);
712 }
713
714 void InterpreterMacroAssembler::push_f() {
715 // Do not schedule for no AGI! Never write beyond rsp!
716 subptr(rsp, 1 * wordSize);
717 fstp_s(Address(rsp, 0));
718 }
719
720 void InterpreterMacroAssembler::push_d() {
721 // Do not schedule for no AGI! Never write beyond rsp!
722 subptr(rsp, 2 * wordSize);
723 fstp_d(Address(rsp, 0));
724 }
725
726
727 void InterpreterMacroAssembler::push(TosState state) {
728 verify_oop(rax, state);
729 switch (state) {
730 case atos: push_ptr(rax); break;
731 case btos: // fall through
732 case ztos: // fall through
733 case ctos: // fall through
734 case stos: // fall through
735 case itos: push_i(rax); break;
736 case ltos: push_l(rax, rdx); break;
737 case ftos:
738 if (UseSSE >= 1) {
739 push_f(xmm0);
740 } else {
741 push_f();
742 }
743 break;
744 case dtos:
745 if (UseSSE >= 2) {
746 push_d(xmm0);
747 } else {
748 push_d();
749 }
750 break;
751 case vtos: /* nothing to do */ break;
752 default : ShouldNotReachHere();
753 }
754 }
755 #endif // _LP64
756
757
758 // Helpers for swap and dup
759 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
760 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
761 }
762
763 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
764 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
765 }
766
767
768 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
769 // set sender sp
770 lea(_bcp_register, Address(rsp, wordSize));
771 // record last_sp
772 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
773 }
774
775
776 // Jump to from_interpreted entry of a call unless single stepping is possible
777 // in this thread in which case we must call the i2i entry
778 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
779 prepare_to_jump_from_interpreted();
780
781 if (JvmtiExport::can_post_interpreter_events()) {
782 Label run_compiled_code;
783 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
784 // compiled code in threads for which the event is enabled. Check here for
785 // interp_only_mode if these events CAN be enabled.
786 // interp_only is an int, on little endian it is sufficient to test the byte only
787 // Is a cmpl faster?
788 LP64_ONLY(temp = r15_thread;)
789 NOT_LP64(get_thread(temp);)
790 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
791 jccb(Assembler::zero, run_compiled_code);
792 jmp(Address(method, Method::interpreter_entry_offset()));
793 bind(run_compiled_code);
794 }
795
796 jmp(Address(method, Method::from_interpreted_offset()));
797 }
798
799 // The following two routines provide a hook so that an implementation
800 // can schedule the dispatch in two parts. x86 does not do this.
801 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
802 // Nothing x86 specific to be done here
803 }
804
805 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
806 dispatch_next(state, step);
807 }
808
809 void InterpreterMacroAssembler::dispatch_base(TosState state,
810 address* table,
811 bool verifyoop,
812 bool generate_poll) {
813 verify_FPU(1, state);
814 if (VerifyActivationFrameSize) {
815 Label L;
816 mov(rcx, rbp);
817 subptr(rcx, rsp);
818 int32_t min_frame_size =
819 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
820 wordSize;
821 cmpptr(rcx, (int32_t)min_frame_size);
822 jcc(Assembler::greaterEqual, L);
823 stop("broken stack frame");
824 bind(L);
825 }
826 if (verifyoop) {
827 verify_oop(rax, state);
828 }
829
830 address* const safepoint_table = Interpreter::safept_table(state);
831 #ifdef _LP64
832 Label no_safepoint, dispatch;
833 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
834 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
835 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
836
837 jccb(Assembler::zero, no_safepoint);
838 lea(rscratch1, ExternalAddress((address)safepoint_table));
839 jmpb(dispatch);
840 }
841
842 bind(no_safepoint);
843 lea(rscratch1, ExternalAddress((address)table));
844 bind(dispatch);
845 jmp(Address(rscratch1, rbx, Address::times_8));
846
847 #else
848 Address index(noreg, rbx, Address::times_ptr);
849 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
850 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
851 Label no_safepoint;
852 const Register thread = rcx;
853 get_thread(thread);
854 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
855
856 jccb(Assembler::zero, no_safepoint);
857 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
858 jump(dispatch_addr);
859 bind(no_safepoint);
860 }
861
862 {
863 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
864 jump(dispatch_addr);
865 }
866 #endif // _LP64
867 }
868
869 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
870 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
871 }
872
873 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
874 dispatch_base(state, Interpreter::normal_table(state));
875 }
876
877 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
878 dispatch_base(state, Interpreter::normal_table(state), false);
879 }
880
881
882 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
883 // load next bytecode (load before advancing _bcp_register to prevent AGI)
884 load_unsigned_byte(rbx, Address(_bcp_register, step));
885 // advance _bcp_register
886 increment(_bcp_register, step);
887 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
888 }
889
890 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
891 // load current bytecode
892 load_unsigned_byte(rbx, Address(_bcp_register, 0));
893 dispatch_base(state, table);
894 }
895
896 void InterpreterMacroAssembler::narrow(Register result) {
897
898 // Get method->_constMethod->_result_type
899 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
900 movptr(rcx, Address(rcx, Method::const_offset()));
901 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
902
903 Label done, notBool, notByte, notChar;
904
905 // common case first
906 cmpl(rcx, T_INT);
907 jcc(Assembler::equal, done);
908
909 // mask integer result to narrower return type.
910 cmpl(rcx, T_BOOLEAN);
911 jcc(Assembler::notEqual, notBool);
912 andl(result, 0x1);
913 jmp(done);
914
915 bind(notBool);
916 cmpl(rcx, T_BYTE);
917 jcc(Assembler::notEqual, notByte);
918 LP64_ONLY(movsbl(result, result);)
919 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
920 NOT_LP64(sarl(result, 24);) // and sign-extend byte
921 jmp(done);
922
923 bind(notByte);
924 cmpl(rcx, T_CHAR);
925 jcc(Assembler::notEqual, notChar);
926 LP64_ONLY(movzwl(result, result);)
927 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
928 jmp(done);
929
930 bind(notChar);
931 // cmpl(rcx, T_SHORT); // all that's left
932 // jcc(Assembler::notEqual, done);
933 LP64_ONLY(movswl(result, result);)
934 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
935 NOT_LP64(sarl(result, 16);) // and sign-extend short
936
937 // Nothing to do for T_INT
938 bind(done);
939 }
940
941 // remove activation
942 //
943 // Unlock the receiver if this is a synchronized method.
944 // Unlock any Java monitors from syncronized blocks.
945 // Remove the activation from the stack.
946 //
947 // If there are locked Java monitors
948 // If throw_monitor_exception
949 // throws IllegalMonitorStateException
950 // Else if install_monitor_exception
951 // installs IllegalMonitorStateException
952 // Else
953 // no error processing
954 void InterpreterMacroAssembler::remove_activation(
955 TosState state,
956 Register ret_addr,
957 bool throw_monitor_exception,
958 bool install_monitor_exception,
959 bool notify_jvmdi) {
960 // Note: Registers rdx xmm0 may be in use for the
961 // result check if synchronized method
962 Label unlocked, unlock, no_unlock;
963
964 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
965 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
966 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
967 // monitor pointers need different register
968 // because rdx may have the result in it
969 NOT_LP64(get_thread(rcx);)
970
971 // get the value of _do_not_unlock_if_synchronized into rdx
972 const Address do_not_unlock_if_synchronized(rthread,
973 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
974 movbool(rbx, do_not_unlock_if_synchronized);
975 movbool(do_not_unlock_if_synchronized, false); // reset the flag
976
977 // get method access flags
978 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
979 movl(rcx, Address(rcx, Method::access_flags_offset()));
980 testl(rcx, JVM_ACC_SYNCHRONIZED);
981 jcc(Assembler::zero, unlocked);
982
983 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
984 // is set.
985 testbool(rbx);
986 jcc(Assembler::notZero, no_unlock);
987
988 // unlock monitor
989 push(state); // save result
990
991 // BasicObjectLock will be first in list, since this is a
992 // synchronized method. However, need to check that the object has
993 // not been unlocked by an explicit monitorexit bytecode.
994 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
995 wordSize - (int) sizeof(BasicObjectLock));
996 // We use c_rarg1/rdx so that if we go slow path it will be the correct
997 // register for unlock_object to pass to VM directly
998 lea(robj, monitor); // address of first monitor
999
1000 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1001 testptr(rax, rax);
1002 jcc(Assembler::notZero, unlock);
1003
1004 pop(state);
1005 if (throw_monitor_exception) {
1006 // Entry already unlocked, need to throw exception
1007 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1008 call_VM(noreg, CAST_FROM_FN_PTR(address,
1009 InterpreterRuntime::throw_illegal_monitor_state_exception));
1010 should_not_reach_here();
1011 } else {
1012 // Monitor already unlocked during a stack unroll. If requested,
1013 // install an illegal_monitor_state_exception. Continue with
1014 // stack unrolling.
1015 if (install_monitor_exception) {
1016 NOT_LP64(empty_FPU_stack();)
1017 call_VM(noreg, CAST_FROM_FN_PTR(address,
1018 InterpreterRuntime::new_illegal_monitor_state_exception));
1019 }
1020 jmp(unlocked);
1021 }
1022
1023 bind(unlock);
1024 unlock_object(robj);
1025 pop(state);
1026
1027 // Check that for block-structured locking (i.e., that all locked
1028 // objects has been unlocked)
1029 bind(unlocked);
1030
1031 // rax, rdx: Might contain return value
1032
1033 // Check that all monitors are unlocked
1034 {
1035 Label loop, exception, entry, restart;
1036 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1037 const Address monitor_block_top(
1038 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1039 const Address monitor_block_bot(
1040 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1041
1042 bind(restart);
1043 // We use c_rarg1 so that if we go slow path it will be the correct
1044 // register for unlock_object to pass to VM directly
1045 movptr(rmon, monitor_block_top); // points to current entry, starting
1046 // with top-most entry
1047 lea(rbx, monitor_block_bot); // points to word before bottom of
1048 // monitor block
1049 jmp(entry);
1050
1051 // Entry already locked, need to throw exception
1052 bind(exception);
1053
1054 if (throw_monitor_exception) {
1055 // Throw exception
1056 NOT_LP64(empty_FPU_stack();)
1057 MacroAssembler::call_VM(noreg,
1058 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1059 throw_illegal_monitor_state_exception));
1060 should_not_reach_here();
1061 } else {
1062 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1063 // Unlock does not block, so don't have to worry about the frame.
1064 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1065
1066 push(state);
1067 mov(robj, rmon); // nop if robj and rmon are the same
1068 unlock_object(robj);
1069 pop(state);
1070
1071 if (install_monitor_exception) {
1072 NOT_LP64(empty_FPU_stack();)
1073 call_VM(noreg, CAST_FROM_FN_PTR(address,
1074 InterpreterRuntime::
1075 new_illegal_monitor_state_exception));
1076 }
1077
1078 jmp(restart);
1079 }
1080
1081 bind(loop);
1082 // check if current entry is used
1083 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
1084 jcc(Assembler::notEqual, exception);
1085
1086 addptr(rmon, entry_size); // otherwise advance to next entry
1087 bind(entry);
1088 cmpptr(rmon, rbx); // check if bottom reached
1089 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1090 }
1091
1092 bind(no_unlock);
1093
1094 // jvmti support
1095 if (notify_jvmdi) {
1096 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1097 } else {
1098 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1099 }
1100
1101 if (StackReservedPages > 0) {
1102 movptr(rbx,
1103 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1104 // testing if reserved zone needs to be re-enabled
1105 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1106 Label no_reserved_zone_enabling;
1107
1108 NOT_LP64(get_thread(rthread);)
1109
1110 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1111 jcc(Assembler::equal, no_reserved_zone_enabling);
1112
1113 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1114 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1115
1116 call_VM_leaf(
1117 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1118 call_VM(noreg, CAST_FROM_FN_PTR(address,
1119 InterpreterRuntime::throw_delayed_StackOverflowError));
1120 should_not_reach_here();
1121
1122 bind(no_reserved_zone_enabling);
1123 }
1124
1125 // remove activation
1126 // get sender sp
1127 movptr(rbx,
1128 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1129
1130 if (state == atos && ValueTypeReturnedAsFields) {
1131 Label skip;
1132 // Test if the return type is a value type
1133 movptr(rdi, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1134 movptr(rdi, Address(rdi, Method::const_offset()));
1135 load_unsigned_byte(rdi, Address(rdi, ConstMethod::result_type_offset()));
1136 cmpl(rdi, T_VALUETYPE);
1137 jcc(Assembler::notEqual, skip);
1138
1139 // We are returning a value type, load its fields into registers
1140 #ifndef _LP64
1141 super_call_VM_leaf(StubRoutines::load_value_type_fields_in_regs());
1142 #else
1143 // Load fields from a buffered value with a value class specific handler
1144 load_klass(rdi, rax);
1145 movptr(rdi, Address(rdi, InstanceKlass::adr_valueklass_fixed_block_offset()));
1146 movptr(rdi, Address(rdi, ValueKlass::unpack_handler_offset()));
1147
1148 testptr(rdi, rdi);
1149 jcc(Assembler::equal, skip);
1150
1151 call(rdi);
1152 #endif
1153 // call above kills the value in rbx. Reload it.
1154 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1155 bind(skip);
1156 }
1157 leave(); // remove frame anchor
1158 pop(ret_addr); // get return address
1159 mov(rsp, rbx); // set sp to sender sp
1160 }
1161
1162 void InterpreterMacroAssembler::get_method_counters(Register method,
1163 Register mcs, Label& skip) {
1164 Label has_counters;
1165 movptr(mcs, Address(method, Method::method_counters_offset()));
1166 testptr(mcs, mcs);
1167 jcc(Assembler::notZero, has_counters);
1168 call_VM(noreg, CAST_FROM_FN_PTR(address,
1169 InterpreterRuntime::build_method_counters), method);
1170 movptr(mcs, Address(method,Method::method_counters_offset()));
1171 testptr(mcs, mcs);
1172 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1173 bind(has_counters);
1174 }
1175
1176
1177 // Lock object
1178 //
1179 // Args:
1180 // rdx, c_rarg1: BasicObjectLock to be used for locking
1181 //
1182 // Kills:
1183 // rax, rbx
1184 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1185 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1186 "The argument is only for looks. It must be c_rarg1");
1187
1188 if (UseHeavyMonitors) {
1189 call_VM(noreg,
1190 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1191 lock_reg);
1192 } else {
1193 Label done;
1194
1195 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1196 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1197 // problematic case where tmp_reg = no_reg.
1198 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1199
1200 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1201 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1202 const int mark_offset = lock_offset +
1203 BasicLock::displaced_header_offset_in_bytes();
1204
1205 Label slow_case;
1206
1207 // Load object pointer into obj_reg
1208 movptr(obj_reg, Address(lock_reg, obj_offset));
1209
1210 if (UseBiasedLocking) {
1211 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1212 }
1213
1214 // Load immediate 1 into swap_reg %rax
1215 movl(swap_reg, (int32_t)1);
1216
1217 // Load (object->mark() | 1) into swap_reg %rax
1218 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1219 if (EnableValhalla && !UseBiasedLocking) {
1220 // For slow path is_always_locked, using biased, which is never natural for !UseBiasLocking
1221 andptr(swap_reg, ~markOopDesc::biased_lock_bit_in_place);
1222 }
1223
1224 // Save (object->mark() | 1) into BasicLock's displaced header
1225 movptr(Address(lock_reg, mark_offset), swap_reg);
1226
1227 assert(lock_offset == 0,
1228 "displaced header must be first word in BasicObjectLock");
1229
1230 lock();
1231 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1232 if (PrintBiasedLockingStatistics) {
1233 cond_inc32(Assembler::zero,
1234 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1235 }
1236 jcc(Assembler::zero, done);
1237
1238 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1239
1240 // Test if the oopMark is an obvious stack pointer, i.e.,
1241 // 1) (mark & zero_bits) == 0, and
1242 // 2) rsp <= mark < mark + os::pagesize()
1243 //
1244 // These 3 tests can be done by evaluating the following
1245 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1246 // assuming both stack pointer and pagesize have their
1247 // least significant bits clear.
1248 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1249 subptr(swap_reg, rsp);
1250 andptr(swap_reg, zero_bits - os::vm_page_size());
1251
1252 // Save the test result, for recursive case, the result is zero
1253 movptr(Address(lock_reg, mark_offset), swap_reg);
1254
1255 if (PrintBiasedLockingStatistics) {
1256 cond_inc32(Assembler::zero,
1257 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1258 }
1259 jcc(Assembler::zero, done);
1260
1261 bind(slow_case);
1262
1263 // Call the runtime routine for slow case
1264 call_VM(noreg,
1265 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1266 lock_reg);
1267
1268 bind(done);
1269 }
1270 }
1271
1272
1273 // Unlocks an object. Used in monitorexit bytecode and
1274 // remove_activation. Throws an IllegalMonitorException if object is
1275 // not locked by current thread.
1276 //
1277 // Args:
1278 // rdx, c_rarg1: BasicObjectLock for lock
1279 //
1280 // Kills:
1281 // rax
1282 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1283 // rscratch1 (scratch reg)
1284 // rax, rbx, rcx, rdx
1285 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1286 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1287 "The argument is only for looks. It must be c_rarg1");
1288
1289 if (UseHeavyMonitors) {
1290 call_VM(noreg,
1291 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1292 lock_reg);
1293 } else {
1294 Label done;
1295
1296 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1297 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1298 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1299
1300 save_bcp(); // Save in case of exception
1301
1302 // Convert from BasicObjectLock structure to object and BasicLock
1303 // structure Store the BasicLock address into %rax
1304 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1305
1306 // Load oop into obj_reg(%c_rarg3)
1307 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1308
1309 // Free entry
1310 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1311
1312 if (UseBiasedLocking) {
1313 biased_locking_exit(obj_reg, header_reg, done);
1314 }
1315
1316 // Load the old header from BasicLock structure
1317 movptr(header_reg, Address(swap_reg,
1318 BasicLock::displaced_header_offset_in_bytes()));
1319
1320 // Test for recursion
1321 testptr(header_reg, header_reg);
1322
1323 // zero for recursive case
1324 jcc(Assembler::zero, done);
1325
1326 // Atomic swap back the old header
1327 lock();
1328 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1329
1330 // zero for simple unlock of a stack-lock case
1331 jcc(Assembler::zero, done);
1332
1333 // Call the runtime routine for slow case.
1334 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1335 obj_reg); // restore obj
1336 call_VM(noreg,
1337 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1338 lock_reg);
1339
1340 bind(done);
1341
1342 restore_bcp();
1343 }
1344 }
1345
1346 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1347 Label& zero_continue) {
1348 assert(ProfileInterpreter, "must be profiling interpreter");
1349 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1350 testptr(mdp, mdp);
1351 jcc(Assembler::zero, zero_continue);
1352 }
1353
1354
1355 // Set the method data pointer for the current bcp.
1356 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1357 assert(ProfileInterpreter, "must be profiling interpreter");
1358 Label set_mdp;
1359 push(rax);
1360 push(rbx);
1361
1362 get_method(rbx);
1363 // Test MDO to avoid the call if it is NULL.
1364 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1365 testptr(rax, rax);
1366 jcc(Assembler::zero, set_mdp);
1367 // rbx: method
1368 // _bcp_register: bcp
1369 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1370 // rax: mdi
1371 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1372 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1373 addptr(rbx, in_bytes(MethodData::data_offset()));
1374 addptr(rax, rbx);
1375 bind(set_mdp);
1376 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1377 pop(rbx);
1378 pop(rax);
1379 }
1380
1381 void InterpreterMacroAssembler::verify_method_data_pointer() {
1382 assert(ProfileInterpreter, "must be profiling interpreter");
1383 #ifdef ASSERT
1384 Label verify_continue;
1385 push(rax);
1386 push(rbx);
1387 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1388 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1389 push(arg3_reg);
1390 push(arg2_reg);
1391 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1392 get_method(rbx);
1393
1394 // If the mdp is valid, it will point to a DataLayout header which is
1395 // consistent with the bcp. The converse is highly probable also.
1396 load_unsigned_short(arg2_reg,
1397 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1398 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1399 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1400 cmpptr(arg2_reg, _bcp_register);
1401 jcc(Assembler::equal, verify_continue);
1402 // rbx: method
1403 // _bcp_register: bcp
1404 // c_rarg3: mdp
1405 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1406 rbx, _bcp_register, arg3_reg);
1407 bind(verify_continue);
1408 pop(arg2_reg);
1409 pop(arg3_reg);
1410 pop(rbx);
1411 pop(rax);
1412 #endif // ASSERT
1413 }
1414
1415
1416 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1417 int constant,
1418 Register value) {
1419 assert(ProfileInterpreter, "must be profiling interpreter");
1420 Address data(mdp_in, constant);
1421 movptr(data, value);
1422 }
1423
1424
1425 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1426 int constant,
1427 bool decrement) {
1428 // Counter address
1429 Address data(mdp_in, constant);
1430
1431 increment_mdp_data_at(data, decrement);
1432 }
1433
1434 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1435 bool decrement) {
1436 assert(ProfileInterpreter, "must be profiling interpreter");
1437 // %%% this does 64bit counters at best it is wasting space
1438 // at worst it is a rare bug when counters overflow
1439
1440 if (decrement) {
1441 // Decrement the register. Set condition codes.
1442 addptr(data, (int32_t) -DataLayout::counter_increment);
1443 // If the decrement causes the counter to overflow, stay negative
1444 Label L;
1445 jcc(Assembler::negative, L);
1446 addptr(data, (int32_t) DataLayout::counter_increment);
1447 bind(L);
1448 } else {
1449 assert(DataLayout::counter_increment == 1,
1450 "flow-free idiom only works with 1");
1451 // Increment the register. Set carry flag.
1452 addptr(data, DataLayout::counter_increment);
1453 // If the increment causes the counter to overflow, pull back by 1.
1454 sbbptr(data, (int32_t)0);
1455 }
1456 }
1457
1458
1459 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1460 Register reg,
1461 int constant,
1462 bool decrement) {
1463 Address data(mdp_in, reg, Address::times_1, constant);
1464
1465 increment_mdp_data_at(data, decrement);
1466 }
1467
1468 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1469 int flag_byte_constant) {
1470 assert(ProfileInterpreter, "must be profiling interpreter");
1471 int header_offset = in_bytes(DataLayout::flags_offset());
1472 int header_bits = flag_byte_constant;
1473 // Set the flag
1474 orb(Address(mdp_in, header_offset), header_bits);
1475 }
1476
1477
1478
1479 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1480 int offset,
1481 Register value,
1482 Register test_value_out,
1483 Label& not_equal_continue) {
1484 assert(ProfileInterpreter, "must be profiling interpreter");
1485 if (test_value_out == noreg) {
1486 cmpptr(value, Address(mdp_in, offset));
1487 } else {
1488 // Put the test value into a register, so caller can use it:
1489 movptr(test_value_out, Address(mdp_in, offset));
1490 cmpptr(test_value_out, value);
1491 }
1492 jcc(Assembler::notEqual, not_equal_continue);
1493 }
1494
1495
1496 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1497 int offset_of_disp) {
1498 assert(ProfileInterpreter, "must be profiling interpreter");
1499 Address disp_address(mdp_in, offset_of_disp);
1500 addptr(mdp_in, disp_address);
1501 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1502 }
1503
1504
1505 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1506 Register reg,
1507 int offset_of_disp) {
1508 assert(ProfileInterpreter, "must be profiling interpreter");
1509 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1510 addptr(mdp_in, disp_address);
1511 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1512 }
1513
1514
1515 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1516 int constant) {
1517 assert(ProfileInterpreter, "must be profiling interpreter");
1518 addptr(mdp_in, constant);
1519 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1520 }
1521
1522
1523 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1524 assert(ProfileInterpreter, "must be profiling interpreter");
1525 push(return_bci); // save/restore across call_VM
1526 call_VM(noreg,
1527 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1528 return_bci);
1529 pop(return_bci);
1530 }
1531
1532
1533 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1534 Register bumped_count) {
1535 if (ProfileInterpreter) {
1536 Label profile_continue;
1537
1538 // If no method data exists, go to profile_continue.
1539 // Otherwise, assign to mdp
1540 test_method_data_pointer(mdp, profile_continue);
1541
1542 // We are taking a branch. Increment the taken count.
1543 // We inline increment_mdp_data_at to return bumped_count in a register
1544 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1545 Address data(mdp, in_bytes(JumpData::taken_offset()));
1546 movptr(bumped_count, data);
1547 assert(DataLayout::counter_increment == 1,
1548 "flow-free idiom only works with 1");
1549 addptr(bumped_count, DataLayout::counter_increment);
1550 sbbptr(bumped_count, 0);
1551 movptr(data, bumped_count); // Store back out
1552
1553 // The method data pointer needs to be updated to reflect the new target.
1554 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1555 bind(profile_continue);
1556 }
1557 }
1558
1559
1560 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1561 if (ProfileInterpreter) {
1562 Label profile_continue;
1563
1564 // If no method data exists, go to profile_continue.
1565 test_method_data_pointer(mdp, profile_continue);
1566
1567 // We are taking a branch. Increment the not taken count.
1568 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1569
1570 // The method data pointer needs to be updated to correspond to
1571 // the next bytecode
1572 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1573 bind(profile_continue);
1574 }
1575 }
1576
1577 void InterpreterMacroAssembler::profile_call(Register mdp) {
1578 if (ProfileInterpreter) {
1579 Label profile_continue;
1580
1581 // If no method data exists, go to profile_continue.
1582 test_method_data_pointer(mdp, profile_continue);
1583
1584 // We are making a call. Increment the count.
1585 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1586
1587 // The method data pointer needs to be updated to reflect the new target.
1588 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1589 bind(profile_continue);
1590 }
1591 }
1592
1593
1594 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1595 if (ProfileInterpreter) {
1596 Label profile_continue;
1597
1598 // If no method data exists, go to profile_continue.
1599 test_method_data_pointer(mdp, profile_continue);
1600
1601 // We are making a call. Increment the count.
1602 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1603
1604 // The method data pointer needs to be updated to reflect the new target.
1605 update_mdp_by_constant(mdp,
1606 in_bytes(VirtualCallData::
1607 virtual_call_data_size()));
1608 bind(profile_continue);
1609 }
1610 }
1611
1612
1613 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1614 Register mdp,
1615 Register reg2,
1616 bool receiver_can_be_null) {
1617 if (ProfileInterpreter) {
1618 Label profile_continue;
1619
1620 // If no method data exists, go to profile_continue.
1621 test_method_data_pointer(mdp, profile_continue);
1622
1623 Label skip_receiver_profile;
1624 if (receiver_can_be_null) {
1625 Label not_null;
1626 testptr(receiver, receiver);
1627 jccb(Assembler::notZero, not_null);
1628 // We are making a call. Increment the count for null receiver.
1629 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1630 jmp(skip_receiver_profile);
1631 bind(not_null);
1632 }
1633
1634 // Record the receiver type.
1635 record_klass_in_profile(receiver, mdp, reg2, true);
1636 bind(skip_receiver_profile);
1637
1638 // The method data pointer needs to be updated to reflect the new target.
1639 #if INCLUDE_JVMCI
1640 if (MethodProfileWidth == 0) {
1641 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1642 }
1643 #else // INCLUDE_JVMCI
1644 update_mdp_by_constant(mdp,
1645 in_bytes(VirtualCallData::
1646 virtual_call_data_size()));
1647 #endif // INCLUDE_JVMCI
1648 bind(profile_continue);
1649 }
1650 }
1651
1652 #if INCLUDE_JVMCI
1653 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1654 assert_different_registers(method, mdp, reg2);
1655 if (ProfileInterpreter && MethodProfileWidth > 0) {
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 done;
1662 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1663 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1664 bind(done);
1665
1666 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1667 bind(profile_continue);
1668 }
1669 }
1670 #endif // INCLUDE_JVMCI
1671
1672 // This routine creates a state machine for updating the multi-row
1673 // type profile at a virtual call site (or other type-sensitive bytecode).
1674 // The machine visits each row (of receiver/count) until the receiver type
1675 // is found, or until it runs out of rows. At the same time, it remembers
1676 // the location of the first empty row. (An empty row records null for its
1677 // receiver, and can be allocated for a newly-observed receiver type.)
1678 // Because there are two degrees of freedom in the state, a simple linear
1679 // search will not work; it must be a decision tree. Hence this helper
1680 // function is recursive, to generate the required tree structured code.
1681 // It's the interpreter, so we are trading off code space for speed.
1682 // See below for example code.
1683 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1684 Register receiver, Register mdp,
1685 Register reg2, int start_row,
1686 Label& done, bool is_virtual_call) {
1687 if (TypeProfileWidth == 0) {
1688 if (is_virtual_call) {
1689 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1690 }
1691 #if INCLUDE_JVMCI
1692 else if (EnableJVMCI) {
1693 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1694 }
1695 #endif // INCLUDE_JVMCI
1696 } else {
1697 int non_profiled_offset = -1;
1698 if (is_virtual_call) {
1699 non_profiled_offset = in_bytes(CounterData::count_offset());
1700 }
1701 #if INCLUDE_JVMCI
1702 else if (EnableJVMCI) {
1703 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1704 }
1705 #endif // INCLUDE_JVMCI
1706
1707 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1708 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1709 }
1710 }
1711
1712 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1713 Register reg2, int start_row, Label& done, int total_rows,
1714 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1715 int non_profiled_offset) {
1716 int last_row = total_rows - 1;
1717 assert(start_row <= last_row, "must be work left to do");
1718 // Test this row for both the item and for null.
1719 // Take any of three different outcomes:
1720 // 1. found item => increment count and goto done
1721 // 2. found null => keep looking for case 1, maybe allocate this cell
1722 // 3. found something else => keep looking for cases 1 and 2
1723 // Case 3 is handled by a recursive call.
1724 for (int row = start_row; row <= last_row; row++) {
1725 Label next_test;
1726 bool test_for_null_also = (row == start_row);
1727
1728 // See if the item is item[n].
1729 int item_offset = in_bytes(item_offset_fn(row));
1730 test_mdp_data_at(mdp, item_offset, item,
1731 (test_for_null_also ? reg2 : noreg),
1732 next_test);
1733 // (Reg2 now contains the item from the CallData.)
1734
1735 // The item is item[n]. Increment count[n].
1736 int count_offset = in_bytes(item_count_offset_fn(row));
1737 increment_mdp_data_at(mdp, count_offset);
1738 jmp(done);
1739 bind(next_test);
1740
1741 if (test_for_null_also) {
1742 // Failed the equality check on item[n]... Test for null.
1743 testptr(reg2, reg2);
1744 if (start_row == last_row) {
1745 // The only thing left to do is handle the null case.
1746 if (non_profiled_offset >= 0) {
1747 Label found_null;
1748 jccb(Assembler::zero, found_null);
1749 // Item did not match any saved item and there is no empty row for it.
1750 // Increment total counter to indicate polymorphic case.
1751 increment_mdp_data_at(mdp, non_profiled_offset);
1752 jmp(done);
1753 bind(found_null);
1754 } else {
1755 jcc(Assembler::notZero, done);
1756 }
1757 break;
1758 }
1759 Label found_null;
1760 // Since null is rare, make it be the branch-taken case.
1761 jcc(Assembler::zero, found_null);
1762
1763 // Put all the "Case 3" tests here.
1764 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1765 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1766
1767 // Found a null. Keep searching for a matching item,
1768 // but remember that this is an empty (unused) slot.
1769 bind(found_null);
1770 }
1771 }
1772
1773 // In the fall-through case, we found no matching item, but we
1774 // observed the item[start_row] is NULL.
1775
1776 // Fill in the item field and increment the count.
1777 int item_offset = in_bytes(item_offset_fn(start_row));
1778 set_mdp_data_at(mdp, item_offset, item);
1779 int count_offset = in_bytes(item_count_offset_fn(start_row));
1780 movl(reg2, DataLayout::counter_increment);
1781 set_mdp_data_at(mdp, count_offset, reg2);
1782 if (start_row > 0) {
1783 jmp(done);
1784 }
1785 }
1786
1787 // Example state machine code for three profile rows:
1788 // // main copy of decision tree, rooted at row[1]
1789 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1790 // if (row[0].rec != NULL) {
1791 // // inner copy of decision tree, rooted at row[1]
1792 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1793 // if (row[1].rec != NULL) {
1794 // // degenerate decision tree, rooted at row[2]
1795 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1796 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1797 // row[2].init(rec); goto done;
1798 // } else {
1799 // // remember row[1] is empty
1800 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1801 // row[1].init(rec); goto done;
1802 // }
1803 // } else {
1804 // // remember row[0] is empty
1805 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1806 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1807 // row[0].init(rec); goto done;
1808 // }
1809 // done:
1810
1811 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1812 Register mdp, Register reg2,
1813 bool is_virtual_call) {
1814 assert(ProfileInterpreter, "must be profiling");
1815 Label done;
1816
1817 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1818
1819 bind (done);
1820 }
1821
1822 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1823 Register mdp) {
1824 if (ProfileInterpreter) {
1825 Label profile_continue;
1826 uint row;
1827
1828 // If no method data exists, go to profile_continue.
1829 test_method_data_pointer(mdp, profile_continue);
1830
1831 // Update the total ret count.
1832 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1833
1834 for (row = 0; row < RetData::row_limit(); row++) {
1835 Label next_test;
1836
1837 // See if return_bci is equal to bci[n]:
1838 test_mdp_data_at(mdp,
1839 in_bytes(RetData::bci_offset(row)),
1840 return_bci, noreg,
1841 next_test);
1842
1843 // return_bci is equal to bci[n]. Increment the count.
1844 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1845
1846 // The method data pointer needs to be updated to reflect the new target.
1847 update_mdp_by_offset(mdp,
1848 in_bytes(RetData::bci_displacement_offset(row)));
1849 jmp(profile_continue);
1850 bind(next_test);
1851 }
1852
1853 update_mdp_for_ret(return_bci);
1854
1855 bind(profile_continue);
1856 }
1857 }
1858
1859
1860 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1861 if (ProfileInterpreter) {
1862 Label profile_continue;
1863
1864 // If no method data exists, go to profile_continue.
1865 test_method_data_pointer(mdp, profile_continue);
1866
1867 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1868
1869 // The method data pointer needs to be updated.
1870 int mdp_delta = in_bytes(BitData::bit_data_size());
1871 if (TypeProfileCasts) {
1872 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1873 }
1874 update_mdp_by_constant(mdp, mdp_delta);
1875
1876 bind(profile_continue);
1877 }
1878 }
1879
1880
1881 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1882 if (ProfileInterpreter && TypeProfileCasts) {
1883 Label profile_continue;
1884
1885 // If no method data exists, go to profile_continue.
1886 test_method_data_pointer(mdp, profile_continue);
1887
1888 int count_offset = in_bytes(CounterData::count_offset());
1889 // Back up the address, since we have already bumped the mdp.
1890 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1891
1892 // *Decrement* the counter. We expect to see zero or small negatives.
1893 increment_mdp_data_at(mdp, count_offset, true);
1894
1895 bind (profile_continue);
1896 }
1897 }
1898
1899
1900 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1901 if (ProfileInterpreter) {
1902 Label profile_continue;
1903
1904 // If no method data exists, go to profile_continue.
1905 test_method_data_pointer(mdp, profile_continue);
1906
1907 // The method data pointer needs to be updated.
1908 int mdp_delta = in_bytes(BitData::bit_data_size());
1909 if (TypeProfileCasts) {
1910 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1911
1912 // Record the object type.
1913 record_klass_in_profile(klass, mdp, reg2, false);
1914 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1915 NOT_LP64(restore_locals();) // Restore EDI
1916 }
1917 update_mdp_by_constant(mdp, mdp_delta);
1918
1919 bind(profile_continue);
1920 }
1921 }
1922
1923
1924 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1925 if (ProfileInterpreter) {
1926 Label profile_continue;
1927
1928 // If no method data exists, go to profile_continue.
1929 test_method_data_pointer(mdp, profile_continue);
1930
1931 // Update the default case count
1932 increment_mdp_data_at(mdp,
1933 in_bytes(MultiBranchData::default_count_offset()));
1934
1935 // The method data pointer needs to be updated.
1936 update_mdp_by_offset(mdp,
1937 in_bytes(MultiBranchData::
1938 default_displacement_offset()));
1939
1940 bind(profile_continue);
1941 }
1942 }
1943
1944
1945 void InterpreterMacroAssembler::profile_switch_case(Register index,
1946 Register mdp,
1947 Register reg2) {
1948 if (ProfileInterpreter) {
1949 Label profile_continue;
1950
1951 // If no method data exists, go to profile_continue.
1952 test_method_data_pointer(mdp, profile_continue);
1953
1954 // Build the base (index * per_case_size_in_bytes()) +
1955 // case_array_offset_in_bytes()
1956 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1957 imulptr(index, reg2); // XXX l ?
1958 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1959
1960 // Update the case count
1961 increment_mdp_data_at(mdp,
1962 index,
1963 in_bytes(MultiBranchData::relative_count_offset()));
1964
1965 // The method data pointer needs to be updated.
1966 update_mdp_by_offset(mdp,
1967 index,
1968 in_bytes(MultiBranchData::
1969 relative_displacement_offset()));
1970
1971 bind(profile_continue);
1972 }
1973 }
1974
1975
1976
1977 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1978 if (state == atos) {
1979 MacroAssembler::verify_oop(reg);
1980 }
1981 }
1982
1983 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1984 #ifndef _LP64
1985 if ((state == ftos && UseSSE < 1) ||
1986 (state == dtos && UseSSE < 2)) {
1987 MacroAssembler::verify_FPU(stack_depth);
1988 }
1989 #endif
1990 }
1991
1992 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1993 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1994 int increment, Address mask,
1995 Register scratch, bool preloaded,
1996 Condition cond, Label* where) {
1997 if (!preloaded) {
1998 movl(scratch, counter_addr);
1999 }
2000 incrementl(scratch, increment);
2001 movl(counter_addr, scratch);
2002 andl(scratch, mask);
2003 if (where != NULL) {
2004 jcc(cond, *where);
2005 }
2006 }
2007
2008 void InterpreterMacroAssembler::notify_method_entry() {
2009 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2010 // track stack depth. If it is possible to enter interp_only_mode we add
2011 // the code to check if the event should be sent.
2012 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2013 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2014 if (JvmtiExport::can_post_interpreter_events()) {
2015 Label L;
2016 NOT_LP64(get_thread(rthread);)
2017 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2018 testl(rdx, rdx);
2019 jcc(Assembler::zero, L);
2020 call_VM(noreg, CAST_FROM_FN_PTR(address,
2021 InterpreterRuntime::post_method_entry));
2022 bind(L);
2023 }
2024
2025 {
2026 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2027 NOT_LP64(get_thread(rthread);)
2028 get_method(rarg);
2029 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2030 rthread, rarg);
2031 }
2032
2033 // RedefineClasses() tracing support for obsolete method entry
2034 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2035 NOT_LP64(get_thread(rthread);)
2036 get_method(rarg);
2037 call_VM_leaf(
2038 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2039 rthread, rarg);
2040 }
2041 }
2042
2043
2044 void InterpreterMacroAssembler::notify_method_exit(
2045 TosState state, NotifyMethodExitMode mode) {
2046 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2047 // track stack depth. If it is possible to enter interp_only_mode we add
2048 // the code to check if the event should be sent.
2049 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2050 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2051 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2052 Label L;
2053 // Note: frame::interpreter_frame_result has a dependency on how the
2054 // method result is saved across the call to post_method_exit. If this
2055 // is changed then the interpreter_frame_result implementation will
2056 // need to be updated too.
2057
2058 // template interpreter will leave the result on the top of the stack.
2059 push(state);
2060 NOT_LP64(get_thread(rthread);)
2061 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2062 testl(rdx, rdx);
2063 jcc(Assembler::zero, L);
2064 call_VM(noreg,
2065 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2066 bind(L);
2067 pop(state);
2068 }
2069
2070 {
2071 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2072 push(state);
2073 NOT_LP64(get_thread(rthread);)
2074 get_method(rarg);
2075 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2076 rthread, rarg);
2077 pop(state);
2078 }
2079 }