1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "prims/jvmtiExport.hpp"
35 #include "prims/jvmtiThreadState.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/safepointMechanism.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/thread.inline.hpp"
41
42 // Implementation of InterpreterMacroAssembler
43
44 void InterpreterMacroAssembler::jump_to_entry(address entry) {
45 assert(entry, "Entry must have been generated by now");
46 jump(RuntimeAddress(entry));
47 }
48
49 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
50 Label update, next, none;
51
52 verify_oop(obj);
53
54 testptr(obj, obj);
55 jccb(Assembler::notZero, update);
56 orptr(mdo_addr, TypeEntries::null_seen);
57 jmpb(next);
58
59 bind(update);
60 load_klass(obj, obj);
61
62 xorptr(obj, mdo_addr);
63 testptr(obj, TypeEntries::type_klass_mask);
64 jccb(Assembler::zero, next); // klass seen before, nothing to
65 // do. The unknown bit may have been
66 // set already but no need to check.
67
68 testptr(obj, TypeEntries::type_unknown);
69 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
70
71 cmpptr(mdo_addr, 0);
72 jccb(Assembler::equal, none);
73 cmpptr(mdo_addr, TypeEntries::null_seen);
74 jccb(Assembler::equal, none);
75 // There is a chance that the checks above (re-reading profiling
76 // data from memory) fail if another thread has just set the
77 // profiling to this obj's klass
78 xorptr(obj, mdo_addr);
79 testptr(obj, TypeEntries::type_klass_mask);
80 jccb(Assembler::zero, next);
81
82 // different than before. Cannot keep accurate profile.
83 orptr(mdo_addr, TypeEntries::type_unknown);
84 jmpb(next);
85
86 bind(none);
87 // first time here. Set profile type.
88 movptr(mdo_addr, obj);
89
90 bind(next);
91 }
92
93 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
94 if (!ProfileInterpreter) {
95 return;
96 }
97
98 if (MethodData::profile_arguments() || MethodData::profile_return()) {
99 Label profile_continue;
100
101 test_method_data_pointer(mdp, profile_continue);
102
103 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
104
105 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
106 jcc(Assembler::notEqual, profile_continue);
107
108 if (MethodData::profile_arguments()) {
109 Label done;
110 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
111 addptr(mdp, off_to_args);
112
113 for (int i = 0; i < TypeProfileArgsLimit; i++) {
114 if (i > 0 || MethodData::profile_return()) {
115 // If return value type is profiled we may have no argument to profile
116 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
117 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
118 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
119 jcc(Assembler::less, done);
120 }
121 movptr(tmp, Address(callee, Method::const_offset()));
122 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
123 // stack offset o (zero based) from the start of the argument
124 // list, for n arguments translates into offset n - o - 1 from
125 // the end of the argument list
126 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
127 subl(tmp, 1);
128 Address arg_addr = argument_address(tmp);
129 movptr(tmp, arg_addr);
130
131 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
132 profile_obj_type(tmp, mdo_arg_addr);
133
134 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
135 addptr(mdp, to_add);
136 off_to_args += to_add;
137 }
138
139 if (MethodData::profile_return()) {
140 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
141 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
142 }
143
144 bind(done);
145
146 if (MethodData::profile_return()) {
147 // We're right after the type profile for the last
148 // argument. tmp is the number of cells left in the
149 // CallTypeData/VirtualCallTypeData to reach its end. Non null
150 // if there's a return to profile.
151 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
152 shll(tmp, exact_log2(DataLayout::cell_size));
153 addptr(mdp, tmp);
154 }
155 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
156 } else {
157 assert(MethodData::profile_return(), "either profile call args or call ret");
158 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
159 }
160
161 // mdp points right after the end of the
162 // CallTypeData/VirtualCallTypeData, right after the cells for the
163 // return value type if there's one
164
165 bind(profile_continue);
166 }
167 }
168
169 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
170 assert_different_registers(mdp, ret, tmp, _bcp_register);
171 if (ProfileInterpreter && MethodData::profile_return()) {
172 Label profile_continue, done;
173
174 test_method_data_pointer(mdp, profile_continue);
175
176 if (MethodData::profile_return_jsr292_only()) {
177 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
178
179 // If we don't profile all invoke bytecodes we must make sure
180 // it's a bytecode we indeed profile. We can't go back to the
181 // begining of the ProfileData we intend to update to check its
182 // type because we're right after it and we don't known its
183 // length
184 Label do_profile;
185 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
186 jcc(Assembler::equal, do_profile);
187 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
188 jcc(Assembler::equal, do_profile);
189 get_method(tmp);
190 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
191 jcc(Assembler::notEqual, profile_continue);
192
193 bind(do_profile);
194 }
195
196 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
197 mov(tmp, ret);
198 profile_obj_type(tmp, mdo_ret_addr);
199
200 bind(profile_continue);
201 }
202 }
203
204 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
205 if (ProfileInterpreter && MethodData::profile_parameters()) {
206 Label profile_continue, done;
207
208 test_method_data_pointer(mdp, profile_continue);
209
210 // Load the offset of the area within the MDO used for
211 // parameters. If it's negative we're not profiling any parameters
212 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
213 testl(tmp1, tmp1);
214 jcc(Assembler::negative, profile_continue);
215
216 // Compute a pointer to the area for parameters from the offset
217 // and move the pointer to the slot for the last
218 // parameters. Collect profiling from last parameter down.
219 // mdo start + parameters offset + array length - 1
220 addptr(mdp, tmp1);
221 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
222 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
223
224 Label loop;
225 bind(loop);
226
227 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
228 int type_base = in_bytes(ParametersTypeData::type_offset(0));
229 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
230 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
231 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
232
233 // load offset on the stack from the slot for this parameter
234 movptr(tmp2, arg_off);
235 negptr(tmp2);
236 // read the parameter from the local area
237 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
238
239 // profile the parameter
240 profile_obj_type(tmp2, arg_type);
241
242 // go to next parameter
243 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
244 jcc(Assembler::positive, loop);
245
246 bind(profile_continue);
247 }
248 }
249
250 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
251 int number_of_arguments) {
252 // interpreter specific
253 //
254 // Note: No need to save/restore bcp & locals registers
255 // since these are callee saved registers and no blocking/
256 // GC can happen in leaf calls.
257 // Further Note: DO NOT save/restore bcp/locals. If a caller has
258 // already saved them so that it can use rsi/rdi as temporaries
259 // then a save/restore here will DESTROY the copy the caller
260 // saved! There used to be a save_bcp() that only happened in
261 // the ASSERT path (no restore_bcp). Which caused bizarre failures
262 // when jvm built with ASSERTs.
263 #ifdef ASSERT
264 {
265 Label L;
266 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
267 jcc(Assembler::equal, L);
268 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
269 " last_sp != NULL");
270 bind(L);
271 }
272 #endif
273 // super call
274 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
275 // interpreter specific
276 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
277 // but since they may not have been saved (and we don't want to
278 // save them here (see note above) the assert is invalid.
279 }
280
281 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
282 Register java_thread,
283 Register last_java_sp,
284 address entry_point,
285 int number_of_arguments,
286 bool check_exceptions) {
287 // interpreter specific
288 //
289 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
290 // really make a difference for these runtime calls, since they are
291 // slow anyway. Btw., bcp must be saved/restored since it may change
292 // due to GC.
293 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
294 save_bcp();
295 #ifdef ASSERT
296 {
297 Label L;
298 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
299 jcc(Assembler::equal, L);
300 stop("InterpreterMacroAssembler::call_VM_base:"
301 " last_sp != NULL");
302 bind(L);
303 }
304 #endif /* ASSERT */
305 // super call
306 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
307 entry_point, number_of_arguments,
308 check_exceptions);
309 // interpreter specific
310 restore_bcp();
311 restore_locals();
312 }
313
314 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
315 if (JvmtiExport::can_pop_frame()) {
316 Label L;
317 // Initiate popframe handling only if it is not already being
318 // processed. If the flag has the popframe_processing bit set, it
319 // means that this code is called *during* popframe handling - we
320 // don't want to reenter.
321 // This method is only called just after the call into the vm in
322 // call_VM_base, so the arg registers are available.
323 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
324 LP64_ONLY(c_rarg0);
325 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
326 testl(pop_cond, JavaThread::popframe_pending_bit);
327 jcc(Assembler::zero, L);
328 testl(pop_cond, JavaThread::popframe_processing_bit);
329 jcc(Assembler::notZero, L);
330 // Call Interpreter::remove_activation_preserving_args_entry() to get the
331 // address of the same-named entrypoint in the generated interpreter code.
332 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
333 jmp(rax);
334 bind(L);
335 NOT_LP64(get_thread(java_thread);)
336 }
337 }
338
339 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
340 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
341 NOT_LP64(get_thread(thread);)
342 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
343 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
344 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
345 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
346 #ifdef _LP64
347 switch (state) {
348 case atos: movptr(rax, oop_addr);
349 movptr(oop_addr, (int32_t)NULL_WORD);
350 verify_oop(rax, state); break;
351 case ltos: movptr(rax, val_addr); break;
352 case btos: // fall through
353 case ztos: // fall through
354 case ctos: // fall through
355 case stos: // fall through
356 case itos: movl(rax, val_addr); break;
357 case ftos: load_float(val_addr); break;
358 case dtos: load_double(val_addr); break;
359 case vtos: /* nothing to do */ break;
360 default : ShouldNotReachHere();
361 }
362 // Clean up tos value in the thread object
363 movl(tos_addr, (int) ilgl);
364 movl(val_addr, (int32_t) NULL_WORD);
365 #else
366 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
367 + in_ByteSize(wordSize));
368 switch (state) {
369 case atos: movptr(rax, oop_addr);
370 movptr(oop_addr, NULL_WORD);
371 verify_oop(rax, state); break;
372 case ltos:
373 movl(rdx, val_addr1); // fall through
374 case btos: // fall through
375 case ztos: // fall through
376 case ctos: // fall through
377 case stos: // fall through
378 case itos: movl(rax, val_addr); break;
379 case ftos: load_float(val_addr); break;
380 case dtos: load_double(val_addr); break;
381 case vtos: /* nothing to do */ break;
382 default : ShouldNotReachHere();
383 }
384 #endif // _LP64
385 // Clean up tos value in the thread object
386 movl(tos_addr, (int32_t) ilgl);
387 movptr(val_addr, NULL_WORD);
388 NOT_LP64(movptr(val_addr1, NULL_WORD);)
389 }
390
391
392 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
393 if (JvmtiExport::can_force_early_return()) {
394 Label L;
395 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
396 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
397
398 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
399 testptr(tmp, tmp);
400 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
401
402 // Initiate earlyret handling only if it is not already being processed.
403 // If the flag has the earlyret_processing bit set, it means that this code
404 // is called *during* earlyret handling - we don't want to reenter.
405 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
406 cmpl(tmp, JvmtiThreadState::earlyret_pending);
407 jcc(Assembler::notEqual, L);
408
409 // Call Interpreter::remove_activation_early_entry() to get the address of the
410 // same-named entrypoint in the generated interpreter code.
411 NOT_LP64(get_thread(java_thread);)
412 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
413 #ifdef _LP64
414 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
415 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
416 #else
417 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
418 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
419 #endif // _LP64
420 jmp(rax);
421 bind(L);
422 NOT_LP64(get_thread(java_thread);)
423 }
424 }
425
426 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
427 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
428 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
429 bswapl(reg);
430 shrl(reg, 16);
431 }
432
433 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
434 int bcp_offset,
435 size_t index_size) {
436 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
437 if (index_size == sizeof(u2)) {
438 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
439 } else if (index_size == sizeof(u4)) {
440 movl(index, Address(_bcp_register, bcp_offset));
441 // Check if the secondary index definition is still ~x, otherwise
442 // we have to change the following assembler code to calculate the
443 // plain index.
444 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
445 notl(index); // convert to plain index
446 } else if (index_size == sizeof(u1)) {
447 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
448 } else {
449 ShouldNotReachHere();
450 }
451 }
452
453 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
454 Register index,
455 int bcp_offset,
456 size_t index_size) {
457 assert_different_registers(cache, index);
458 get_cache_index_at_bcp(index, bcp_offset, index_size);
459 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
460 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
461 // convert from field index to ConstantPoolCacheEntry index
462 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
463 shll(index, 2);
464 }
465
466 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
467 Register index,
468 Register bytecode,
469 int byte_no,
470 int bcp_offset,
471 size_t index_size) {
472 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
473 // We use a 32-bit load here since the layout of 64-bit words on
474 // little-endian machines allow us that.
475 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
476 const int shift_count = (1 + byte_no) * BitsPerByte;
477 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
478 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
479 "correct shift count");
480 shrl(bytecode, shift_count);
481 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
482 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
483 }
484
485 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
486 Register tmp,
487 int bcp_offset,
488 size_t index_size) {
489 assert(cache != tmp, "must use different register");
490 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
491 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
492 // convert from field index to ConstantPoolCacheEntry index
493 // and from word offset to byte offset
494 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
495 shll(tmp, 2 + LogBytesPerWord);
496 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
497 // skip past the header
498 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
499 addptr(cache, tmp); // construct pointer to cache entry
500 }
501
502 // Load object from cpool->resolved_references(index)
503 void InterpreterMacroAssembler::load_resolved_reference_at_index(
504 Register result, Register index) {
505 assert_different_registers(result, index);
506 // convert from field index to resolved_references() index and from
507 // word index to byte offset. Since this is a java object, it can be compressed
508 Register tmp = index; // reuse
509 shll(tmp, LogBytesPerHeapOop);
510
511 get_constant_pool(result);
512 // load pointer for resolved_references[] objArray
513 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
514 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
515 resolve_oop_handle(result);
516 // Add in the index
517 addptr(result, tmp);
518 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
519 }
520
521 // load cpool->resolved_klass_at(index)
522 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool,
523 Register index, Register klass) {
524 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
525 Register resolved_klasses = cpool;
526 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
527 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
528 }
529
530 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
531 // subtype of super_klass.
532 //
533 // Args:
534 // rax: superklass
535 // Rsub_klass: subklass
536 //
537 // Kills:
538 // rcx, rdi
539 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
540 Label& ok_is_subtype) {
541 assert(Rsub_klass != rax, "rax holds superklass");
542 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
543 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
544 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
545 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
546
547 // Profile the not-null value's klass.
548 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
549
550 // Do the check.
551 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
552
553 // Profile the failure of the check.
554 profile_typecheck_failed(rcx); // blows rcx
555 }
556
557
558 #ifndef _LP64
559 void InterpreterMacroAssembler::f2ieee() {
560 if (IEEEPrecision) {
561 fstp_s(Address(rsp, 0));
562 fld_s(Address(rsp, 0));
563 }
564 }
565
566
567 void InterpreterMacroAssembler::d2ieee() {
568 if (IEEEPrecision) {
569 fstp_d(Address(rsp, 0));
570 fld_d(Address(rsp, 0));
571 }
572 }
573 #endif // _LP64
574
575 // Java Expression Stack
576
577 void InterpreterMacroAssembler::pop_ptr(Register r) {
578 pop(r);
579 }
580
581 void InterpreterMacroAssembler::push_ptr(Register r) {
582 push(r);
583 }
584
585 void InterpreterMacroAssembler::push_i(Register r) {
586 push(r);
587 }
588
589 void InterpreterMacroAssembler::push_f(XMMRegister r) {
590 subptr(rsp, wordSize);
591 movflt(Address(rsp, 0), r);
592 }
593
594 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
595 movflt(r, Address(rsp, 0));
596 addptr(rsp, wordSize);
597 }
598
599 void InterpreterMacroAssembler::push_d(XMMRegister r) {
600 subptr(rsp, 2 * wordSize);
601 movdbl(Address(rsp, 0), r);
602 }
603
604 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
605 movdbl(r, Address(rsp, 0));
606 addptr(rsp, 2 * Interpreter::stackElementSize);
607 }
608
609 #ifdef _LP64
610 void InterpreterMacroAssembler::pop_i(Register r) {
611 // XXX can't use pop currently, upper half non clean
612 movl(r, Address(rsp, 0));
613 addptr(rsp, wordSize);
614 }
615
616 void InterpreterMacroAssembler::pop_l(Register r) {
617 movq(r, Address(rsp, 0));
618 addptr(rsp, 2 * Interpreter::stackElementSize);
619 }
620
621 void InterpreterMacroAssembler::push_l(Register r) {
622 subptr(rsp, 2 * wordSize);
623 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
624 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
625 }
626
627 void InterpreterMacroAssembler::pop(TosState state) {
628 switch (state) {
629 case atos: pop_ptr(); break;
630 case btos:
631 case ztos:
632 case ctos:
633 case stos:
634 case itos: pop_i(); break;
635 case ltos: pop_l(); break;
636 case ftos: pop_f(xmm0); break;
637 case dtos: pop_d(xmm0); break;
638 case vtos: /* nothing to do */ break;
639 default: ShouldNotReachHere();
640 }
641 verify_oop(rax, state);
642 }
643
644 void InterpreterMacroAssembler::push(TosState state) {
645 verify_oop(rax, state);
646 switch (state) {
647 case atos: push_ptr(); break;
648 case btos:
649 case ztos:
650 case ctos:
651 case stos:
652 case itos: push_i(); break;
653 case ltos: push_l(); break;
654 case ftos: push_f(xmm0); break;
655 case dtos: push_d(xmm0); break;
656 case vtos: /* nothing to do */ break;
657 default : ShouldNotReachHere();
658 }
659 }
660 #else
661 void InterpreterMacroAssembler::pop_i(Register r) {
662 pop(r);
663 }
664
665 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
666 pop(lo);
667 pop(hi);
668 }
669
670 void InterpreterMacroAssembler::pop_f() {
671 fld_s(Address(rsp, 0));
672 addptr(rsp, 1 * wordSize);
673 }
674
675 void InterpreterMacroAssembler::pop_d() {
676 fld_d(Address(rsp, 0));
677 addptr(rsp, 2 * wordSize);
678 }
679
680
681 void InterpreterMacroAssembler::pop(TosState state) {
682 switch (state) {
683 case atos: pop_ptr(rax); break;
684 case btos: // fall through
685 case ztos: // fall through
686 case ctos: // fall through
687 case stos: // fall through
688 case itos: pop_i(rax); break;
689 case ltos: pop_l(rax, rdx); break;
690 case ftos:
691 if (UseSSE >= 1) {
692 pop_f(xmm0);
693 } else {
694 pop_f();
695 }
696 break;
697 case dtos:
698 if (UseSSE >= 2) {
699 pop_d(xmm0);
700 } else {
701 pop_d();
702 }
703 break;
704 case vtos: /* nothing to do */ break;
705 default : ShouldNotReachHere();
706 }
707 verify_oop(rax, state);
708 }
709
710
711 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
712 push(hi);
713 push(lo);
714 }
715
716 void InterpreterMacroAssembler::push_f() {
717 // Do not schedule for no AGI! Never write beyond rsp!
718 subptr(rsp, 1 * wordSize);
719 fstp_s(Address(rsp, 0));
720 }
721
722 void InterpreterMacroAssembler::push_d() {
723 // Do not schedule for no AGI! Never write beyond rsp!
724 subptr(rsp, 2 * wordSize);
725 fstp_d(Address(rsp, 0));
726 }
727
728
729 void InterpreterMacroAssembler::push(TosState state) {
730 verify_oop(rax, state);
731 switch (state) {
732 case atos: push_ptr(rax); break;
733 case btos: // fall through
734 case ztos: // fall through
735 case ctos: // fall through
736 case stos: // fall through
737 case itos: push_i(rax); break;
738 case ltos: push_l(rax, rdx); break;
739 case ftos:
740 if (UseSSE >= 1) {
741 push_f(xmm0);
742 } else {
743 push_f();
744 }
745 break;
746 case dtos:
747 if (UseSSE >= 2) {
748 push_d(xmm0);
749 } else {
750 push_d();
751 }
752 break;
753 case vtos: /* nothing to do */ break;
754 default : ShouldNotReachHere();
755 }
756 }
757 #endif // _LP64
758
759
760 // Helpers for swap and dup
761 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
762 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
763 }
764
765 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
766 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
767 }
768
769
770 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
771 // set sender sp
772 lea(_bcp_register, Address(rsp, wordSize));
773 // record last_sp
774 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
775 }
776
777
778 // Jump to from_interpreted entry of a call unless single stepping is possible
779 // in this thread in which case we must call the i2i entry
780 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
781 prepare_to_jump_from_interpreted();
782
783 if (JvmtiExport::can_post_interpreter_events()) {
784 Label run_compiled_code;
785 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
786 // compiled code in threads for which the event is enabled. Check here for
787 // interp_only_mode if these events CAN be enabled.
788 // interp_only is an int, on little endian it is sufficient to test the byte only
789 // Is a cmpl faster?
790 LP64_ONLY(temp = r15_thread;)
791 NOT_LP64(get_thread(temp);)
792 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
793 jccb(Assembler::zero, run_compiled_code);
794 jmp(Address(method, Method::interpreter_entry_offset()));
795 bind(run_compiled_code);
796 }
797
798 jmp(Address(method, Method::from_interpreted_offset()));
799 }
800
801 // The following two routines provide a hook so that an implementation
802 // can schedule the dispatch in two parts. x86 does not do this.
803 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
804 // Nothing x86 specific to be done here
805 }
806
807 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
808 dispatch_next(state, step);
809 }
810
811 void InterpreterMacroAssembler::dispatch_base(TosState state,
812 address* table,
813 bool verifyoop,
814 bool generate_poll) {
815 verify_FPU(1, state);
816 if (VerifyActivationFrameSize) {
817 Label L;
818 mov(rcx, rbp);
819 subptr(rcx, rsp);
820 int32_t min_frame_size =
821 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
822 wordSize;
823 cmpptr(rcx, (int32_t)min_frame_size);
824 jcc(Assembler::greaterEqual, L);
825 stop("broken stack frame");
826 bind(L);
827 }
828 if (verifyoop) {
829 verify_oop(rax, state);
830 }
831 #ifdef _LP64
832
833 Label no_safepoint, dispatch;
834 address* const safepoint_table = Interpreter::safept_table(state);
835 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
836 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
837
838 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
839
840 jccb(Assembler::zero, no_safepoint);
841 lea(rscratch1, ExternalAddress((address)safepoint_table));
842 jmpb(dispatch);
843 }
844
845 bind(no_safepoint);
846 lea(rscratch1, ExternalAddress((address)table));
847 bind(dispatch);
848 jmp(Address(rscratch1, rbx, Address::times_8));
849
850 #else
851 Address index(noreg, rbx, Address::times_ptr);
852 ExternalAddress tbl((address)table);
853 ArrayAddress dispatch(tbl, index);
854 jump(dispatch);
855 #endif // _LP64
856 }
857
858 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
859 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
860 }
861
862 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
863 dispatch_base(state, Interpreter::normal_table(state));
864 }
865
866 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
867 dispatch_base(state, Interpreter::normal_table(state), false);
868 }
869
870
871 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
872 // load next bytecode (load before advancing _bcp_register to prevent AGI)
873 load_unsigned_byte(rbx, Address(_bcp_register, step));
874 // advance _bcp_register
875 increment(_bcp_register, step);
876 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
877 }
878
879 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
880 // load current bytecode
881 load_unsigned_byte(rbx, Address(_bcp_register, 0));
882 dispatch_base(state, table);
883 }
884
885 void InterpreterMacroAssembler::narrow(Register result) {
886
887 // Get method->_constMethod->_result_type
888 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
889 movptr(rcx, Address(rcx, Method::const_offset()));
890 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
891
892 Label done, notBool, notByte, notChar;
893
894 // common case first
895 cmpl(rcx, T_INT);
896 jcc(Assembler::equal, done);
897
898 // mask integer result to narrower return type.
899 cmpl(rcx, T_BOOLEAN);
900 jcc(Assembler::notEqual, notBool);
901 andl(result, 0x1);
902 jmp(done);
903
904 bind(notBool);
905 cmpl(rcx, T_BYTE);
906 jcc(Assembler::notEqual, notByte);
907 LP64_ONLY(movsbl(result, result);)
908 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
909 NOT_LP64(sarl(result, 24);) // and sign-extend byte
910 jmp(done);
911
912 bind(notByte);
913 cmpl(rcx, T_CHAR);
914 jcc(Assembler::notEqual, notChar);
915 LP64_ONLY(movzwl(result, result);)
916 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
917 jmp(done);
918
919 bind(notChar);
920 // cmpl(rcx, T_SHORT); // all that's left
921 // jcc(Assembler::notEqual, done);
922 LP64_ONLY(movswl(result, result);)
923 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
924 NOT_LP64(sarl(result, 16);) // and sign-extend short
925
926 // Nothing to do for T_INT
927 bind(done);
928 }
929
930 // remove activation
931 //
932 // Unlock the receiver if this is a synchronized method.
933 // Unlock any Java monitors from syncronized blocks.
934 // Remove the activation from the stack.
935 //
936 // If there are locked Java monitors
937 // If throw_monitor_exception
938 // throws IllegalMonitorStateException
939 // Else if install_monitor_exception
940 // installs IllegalMonitorStateException
941 // Else
942 // no error processing
943 void InterpreterMacroAssembler::remove_activation(
944 TosState state,
945 Register ret_addr,
946 bool throw_monitor_exception,
947 bool install_monitor_exception,
948 bool notify_jvmdi) {
949 // Note: Registers rdx xmm0 may be in use for the
950 // result check if synchronized method
951 Label unlocked, unlock, no_unlock;
952
953 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
954 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
955 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
956 // monitor pointers need different register
957 // because rdx may have the result in it
958 NOT_LP64(get_thread(rcx);)
959
960 // get the value of _do_not_unlock_if_synchronized into rdx
961 const Address do_not_unlock_if_synchronized(rthread,
962 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
963 movbool(rbx, do_not_unlock_if_synchronized);
964 movbool(do_not_unlock_if_synchronized, false); // reset the flag
965
966 // get method access flags
967 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
968 movl(rcx, Address(rcx, Method::access_flags_offset()));
969 testl(rcx, JVM_ACC_SYNCHRONIZED);
970 jcc(Assembler::zero, unlocked);
971
972 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
973 // is set.
974 testbool(rbx);
975 jcc(Assembler::notZero, no_unlock);
976
977 // unlock monitor
978 push(state); // save result
979
980 // BasicObjectLock will be first in list, since this is a
981 // synchronized method. However, need to check that the object has
982 // not been unlocked by an explicit monitorexit bytecode.
983 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
984 wordSize - (int) sizeof(BasicObjectLock));
985 // We use c_rarg1/rdx so that if we go slow path it will be the correct
986 // register for unlock_object to pass to VM directly
987 lea(robj, monitor); // address of first monitor
988
989 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
990 testptr(rax, rax);
991 jcc(Assembler::notZero, unlock);
992
993 pop(state);
994 if (throw_monitor_exception) {
995 // Entry already unlocked, need to throw exception
996 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
997 call_VM(noreg, CAST_FROM_FN_PTR(address,
998 InterpreterRuntime::throw_illegal_monitor_state_exception));
999 should_not_reach_here();
1000 } else {
1001 // Monitor already unlocked during a stack unroll. If requested,
1002 // install an illegal_monitor_state_exception. Continue with
1003 // stack unrolling.
1004 if (install_monitor_exception) {
1005 NOT_LP64(empty_FPU_stack();)
1006 call_VM(noreg, CAST_FROM_FN_PTR(address,
1007 InterpreterRuntime::new_illegal_monitor_state_exception));
1008 }
1009 jmp(unlocked);
1010 }
1011
1012 bind(unlock);
1013 unlock_object(robj);
1014 pop(state);
1015
1016 // Check that for block-structured locking (i.e., that all locked
1017 // objects has been unlocked)
1018 bind(unlocked);
1019
1020 // rax, rdx: Might contain return value
1021
1022 // Check that all monitors are unlocked
1023 {
1024 Label loop, exception, entry, restart;
1025 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1026 const Address monitor_block_top(
1027 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1028 const Address monitor_block_bot(
1029 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1030
1031 bind(restart);
1032 // We use c_rarg1 so that if we go slow path it will be the correct
1033 // register for unlock_object to pass to VM directly
1034 movptr(rmon, monitor_block_top); // points to current entry, starting
1035 // with top-most entry
1036 lea(rbx, monitor_block_bot); // points to word before bottom of
1037 // monitor block
1038 jmp(entry);
1039
1040 // Entry already locked, need to throw exception
1041 bind(exception);
1042
1043 if (throw_monitor_exception) {
1044 // Throw exception
1045 NOT_LP64(empty_FPU_stack();)
1046 MacroAssembler::call_VM(noreg,
1047 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1048 throw_illegal_monitor_state_exception));
1049 should_not_reach_here();
1050 } else {
1051 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1052 // Unlock does not block, so don't have to worry about the frame.
1053 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1054
1055 push(state);
1056 mov(robj, rmon); // nop if robj and rmon are the same
1057 unlock_object(robj);
1058 pop(state);
1059
1060 if (install_monitor_exception) {
1061 NOT_LP64(empty_FPU_stack();)
1062 call_VM(noreg, CAST_FROM_FN_PTR(address,
1063 InterpreterRuntime::
1064 new_illegal_monitor_state_exception));
1065 }
1066
1067 jmp(restart);
1068 }
1069
1070 bind(loop);
1071 // check if current entry is used
1072 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
1073 jcc(Assembler::notEqual, exception);
1074
1075 addptr(rmon, entry_size); // otherwise advance to next entry
1076 bind(entry);
1077 cmpptr(rmon, rbx); // check if bottom reached
1078 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1079 }
1080
1081 bind(no_unlock);
1082
1083 // jvmti support
1084 if (notify_jvmdi) {
1085 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1086 } else {
1087 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1088 }
1089
1090 // remove activation
1091 // get sender sp
1092 movptr(rbx,
1093 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1094 if (StackReservedPages > 0) {
1095 // testing if reserved zone needs to be re-enabled
1096 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1097 Label no_reserved_zone_enabling;
1098
1099 NOT_LP64(get_thread(rthread);)
1100
1101 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1102 jcc(Assembler::equal, no_reserved_zone_enabling);
1103
1104 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1105 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1106
1107 call_VM_leaf(
1108 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1109 call_VM(noreg, CAST_FROM_FN_PTR(address,
1110 InterpreterRuntime::throw_delayed_StackOverflowError));
1111 should_not_reach_here();
1112
1113 bind(no_reserved_zone_enabling);
1114 }
1115 leave(); // remove frame anchor
1116 pop(ret_addr); // get return address
1117 mov(rsp, rbx); // set sp to sender sp
1118 }
1119
1120 void InterpreterMacroAssembler::get_method_counters(Register method,
1121 Register mcs, Label& skip) {
1122 Label has_counters;
1123 movptr(mcs, Address(method, Method::method_counters_offset()));
1124 testptr(mcs, mcs);
1125 jcc(Assembler::notZero, has_counters);
1126 call_VM(noreg, CAST_FROM_FN_PTR(address,
1127 InterpreterRuntime::build_method_counters), method);
1128 movptr(mcs, Address(method,Method::method_counters_offset()));
1129 testptr(mcs, mcs);
1130 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1131 bind(has_counters);
1132 }
1133
1134
1135 // Lock object
1136 //
1137 // Args:
1138 // rdx, c_rarg1: BasicObjectLock to be used for locking
1139 //
1140 // Kills:
1141 // rax, rbx
1142 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1143 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1144 "The argument is only for looks. It must be c_rarg1");
1145
1146 if (UseHeavyMonitors) {
1147 call_VM(noreg,
1148 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1149 lock_reg);
1150 } else {
1151 Label done;
1152
1153 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1154 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1155 // problematic case where tmp_reg = no_reg.
1156 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1157
1158 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1159 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1160 const int mark_offset = lock_offset +
1161 BasicLock::displaced_header_offset_in_bytes();
1162
1163 Label slow_case;
1164
1165 // Load object pointer into obj_reg
1166 movptr(obj_reg, Address(lock_reg, obj_offset));
1167
1168 if (UseBiasedLocking) {
1169 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1170 }
1171
1172 // Load immediate 1 into swap_reg %rax
1173 movl(swap_reg, (int32_t)1);
1174
1175 // Load (object->mark() | 1) into swap_reg %rax
1176 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1177
1178 // Save (object->mark() | 1) into BasicLock's displaced header
1179 movptr(Address(lock_reg, mark_offset), swap_reg);
1180
1181 assert(lock_offset == 0,
1182 "displaced header must be first word in BasicObjectLock");
1183
1184 if (os::is_MP()) lock();
1185 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1186 if (PrintBiasedLockingStatistics) {
1187 cond_inc32(Assembler::zero,
1188 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1189 }
1190 jcc(Assembler::zero, done);
1191
1192 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1193
1194 // Test if the oopMark is an obvious stack pointer, i.e.,
1195 // 1) (mark & zero_bits) == 0, and
1196 // 2) rsp <= mark < mark + os::pagesize()
1197 //
1198 // These 3 tests can be done by evaluating the following
1199 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1200 // assuming both stack pointer and pagesize have their
1201 // least significant bits clear.
1202 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1203 subptr(swap_reg, rsp);
1204 andptr(swap_reg, zero_bits - os::vm_page_size());
1205
1206 // Save the test result, for recursive case, the result is zero
1207 movptr(Address(lock_reg, mark_offset), swap_reg);
1208
1209 if (PrintBiasedLockingStatistics) {
1210 cond_inc32(Assembler::zero,
1211 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1212 }
1213 jcc(Assembler::zero, done);
1214
1215 bind(slow_case);
1216
1217 // Call the runtime routine for slow case
1218 call_VM(noreg,
1219 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1220 lock_reg);
1221
1222 bind(done);
1223 }
1224 }
1225
1226
1227 // Unlocks an object. Used in monitorexit bytecode and
1228 // remove_activation. Throws an IllegalMonitorException if object is
1229 // not locked by current thread.
1230 //
1231 // Args:
1232 // rdx, c_rarg1: BasicObjectLock for lock
1233 //
1234 // Kills:
1235 // rax
1236 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1237 // rscratch1 (scratch reg)
1238 // rax, rbx, rcx, rdx
1239 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1240 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1241 "The argument is only for looks. It must be c_rarg1");
1242
1243 if (UseHeavyMonitors) {
1244 call_VM(noreg,
1245 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1246 lock_reg);
1247 } else {
1248 Label done;
1249
1250 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1251 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1252 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1253
1254 save_bcp(); // Save in case of exception
1255
1256 // Convert from BasicObjectLock structure to object and BasicLock
1257 // structure Store the BasicLock address into %rax
1258 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1259
1260 // Load oop into obj_reg(%c_rarg3)
1261 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1262
1263 // Free entry
1264 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1265
1266 if (UseBiasedLocking) {
1267 biased_locking_exit(obj_reg, header_reg, done);
1268 }
1269
1270 // Load the old header from BasicLock structure
1271 movptr(header_reg, Address(swap_reg,
1272 BasicLock::displaced_header_offset_in_bytes()));
1273
1274 // Test for recursion
1275 testptr(header_reg, header_reg);
1276
1277 // zero for recursive case
1278 jcc(Assembler::zero, done);
1279
1280 // Atomic swap back the old header
1281 if (os::is_MP()) lock();
1282 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1283
1284 // zero for simple unlock of a stack-lock case
1285 jcc(Assembler::zero, done);
1286
1287 // Call the runtime routine for slow case.
1288 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1289 obj_reg); // restore obj
1290 call_VM(noreg,
1291 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1292 lock_reg);
1293
1294 bind(done);
1295
1296 restore_bcp();
1297 }
1298 }
1299
1300 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1301 Label& zero_continue) {
1302 assert(ProfileInterpreter, "must be profiling interpreter");
1303 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1304 testptr(mdp, mdp);
1305 jcc(Assembler::zero, zero_continue);
1306 }
1307
1308
1309 // Set the method data pointer for the current bcp.
1310 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1311 assert(ProfileInterpreter, "must be profiling interpreter");
1312 Label set_mdp;
1313 push(rax);
1314 push(rbx);
1315
1316 get_method(rbx);
1317 // Test MDO to avoid the call if it is NULL.
1318 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1319 testptr(rax, rax);
1320 jcc(Assembler::zero, set_mdp);
1321 // rbx: method
1322 // _bcp_register: bcp
1323 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1324 // rax: mdi
1325 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1326 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1327 addptr(rbx, in_bytes(MethodData::data_offset()));
1328 addptr(rax, rbx);
1329 bind(set_mdp);
1330 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1331 pop(rbx);
1332 pop(rax);
1333 }
1334
1335 void InterpreterMacroAssembler::verify_method_data_pointer() {
1336 assert(ProfileInterpreter, "must be profiling interpreter");
1337 #ifdef ASSERT
1338 Label verify_continue;
1339 push(rax);
1340 push(rbx);
1341 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1342 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1343 push(arg3_reg);
1344 push(arg2_reg);
1345 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1346 get_method(rbx);
1347
1348 // If the mdp is valid, it will point to a DataLayout header which is
1349 // consistent with the bcp. The converse is highly probable also.
1350 load_unsigned_short(arg2_reg,
1351 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1352 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1353 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1354 cmpptr(arg2_reg, _bcp_register);
1355 jcc(Assembler::equal, verify_continue);
1356 // rbx: method
1357 // _bcp_register: bcp
1358 // c_rarg3: mdp
1359 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1360 rbx, _bcp_register, arg3_reg);
1361 bind(verify_continue);
1362 pop(arg2_reg);
1363 pop(arg3_reg);
1364 pop(rbx);
1365 pop(rax);
1366 #endif // ASSERT
1367 }
1368
1369
1370 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1371 int constant,
1372 Register value) {
1373 assert(ProfileInterpreter, "must be profiling interpreter");
1374 Address data(mdp_in, constant);
1375 movptr(data, value);
1376 }
1377
1378
1379 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1380 int constant,
1381 bool decrement) {
1382 // Counter address
1383 Address data(mdp_in, constant);
1384
1385 increment_mdp_data_at(data, decrement);
1386 }
1387
1388 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1389 bool decrement) {
1390 assert(ProfileInterpreter, "must be profiling interpreter");
1391 // %%% this does 64bit counters at best it is wasting space
1392 // at worst it is a rare bug when counters overflow
1393
1394 if (decrement) {
1395 // Decrement the register. Set condition codes.
1396 addptr(data, (int32_t) -DataLayout::counter_increment);
1397 // If the decrement causes the counter to overflow, stay negative
1398 Label L;
1399 jcc(Assembler::negative, L);
1400 addptr(data, (int32_t) DataLayout::counter_increment);
1401 bind(L);
1402 } else {
1403 assert(DataLayout::counter_increment == 1,
1404 "flow-free idiom only works with 1");
1405 // Increment the register. Set carry flag.
1406 addptr(data, DataLayout::counter_increment);
1407 // If the increment causes the counter to overflow, pull back by 1.
1408 sbbptr(data, (int32_t)0);
1409 }
1410 }
1411
1412
1413 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1414 Register reg,
1415 int constant,
1416 bool decrement) {
1417 Address data(mdp_in, reg, Address::times_1, constant);
1418
1419 increment_mdp_data_at(data, decrement);
1420 }
1421
1422 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1423 int flag_byte_constant) {
1424 assert(ProfileInterpreter, "must be profiling interpreter");
1425 int header_offset = in_bytes(DataLayout::header_offset());
1426 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1427 // Set the flag
1428 orl(Address(mdp_in, header_offset), header_bits);
1429 }
1430
1431
1432
1433 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1434 int offset,
1435 Register value,
1436 Register test_value_out,
1437 Label& not_equal_continue) {
1438 assert(ProfileInterpreter, "must be profiling interpreter");
1439 if (test_value_out == noreg) {
1440 cmpptr(value, Address(mdp_in, offset));
1441 } else {
1442 // Put the test value into a register, so caller can use it:
1443 movptr(test_value_out, Address(mdp_in, offset));
1444 cmpptr(test_value_out, value);
1445 }
1446 jcc(Assembler::notEqual, not_equal_continue);
1447 }
1448
1449
1450 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1451 int offset_of_disp) {
1452 assert(ProfileInterpreter, "must be profiling interpreter");
1453 Address disp_address(mdp_in, offset_of_disp);
1454 addptr(mdp_in, disp_address);
1455 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1456 }
1457
1458
1459 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1460 Register reg,
1461 int offset_of_disp) {
1462 assert(ProfileInterpreter, "must be profiling interpreter");
1463 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1464 addptr(mdp_in, disp_address);
1465 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1466 }
1467
1468
1469 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1470 int constant) {
1471 assert(ProfileInterpreter, "must be profiling interpreter");
1472 addptr(mdp_in, constant);
1473 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1474 }
1475
1476
1477 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1478 assert(ProfileInterpreter, "must be profiling interpreter");
1479 push(return_bci); // save/restore across call_VM
1480 call_VM(noreg,
1481 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1482 return_bci);
1483 pop(return_bci);
1484 }
1485
1486
1487 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1488 Register bumped_count) {
1489 if (ProfileInterpreter) {
1490 Label profile_continue;
1491
1492 // If no method data exists, go to profile_continue.
1493 // Otherwise, assign to mdp
1494 test_method_data_pointer(mdp, profile_continue);
1495
1496 // We are taking a branch. Increment the taken count.
1497 // We inline increment_mdp_data_at to return bumped_count in a register
1498 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1499 Address data(mdp, in_bytes(JumpData::taken_offset()));
1500 movptr(bumped_count, data);
1501 assert(DataLayout::counter_increment == 1,
1502 "flow-free idiom only works with 1");
1503 addptr(bumped_count, DataLayout::counter_increment);
1504 sbbptr(bumped_count, 0);
1505 movptr(data, bumped_count); // Store back out
1506
1507 // The method data pointer needs to be updated to reflect the new target.
1508 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1509 bind(profile_continue);
1510 }
1511 }
1512
1513
1514 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1515 if (ProfileInterpreter) {
1516 Label profile_continue;
1517
1518 // If no method data exists, go to profile_continue.
1519 test_method_data_pointer(mdp, profile_continue);
1520
1521 // We are taking a branch. Increment the not taken count.
1522 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1523
1524 // The method data pointer needs to be updated to correspond to
1525 // the next bytecode
1526 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1527 bind(profile_continue);
1528 }
1529 }
1530
1531 void InterpreterMacroAssembler::profile_call(Register mdp) {
1532 if (ProfileInterpreter) {
1533 Label profile_continue;
1534
1535 // If no method data exists, go to profile_continue.
1536 test_method_data_pointer(mdp, profile_continue);
1537
1538 // We are making a call. Increment the count.
1539 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1540
1541 // The method data pointer needs to be updated to reflect the new target.
1542 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1543 bind(profile_continue);
1544 }
1545 }
1546
1547
1548 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1549 if (ProfileInterpreter) {
1550 Label profile_continue;
1551
1552 // If no method data exists, go to profile_continue.
1553 test_method_data_pointer(mdp, profile_continue);
1554
1555 // We are making a call. Increment the count.
1556 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1557
1558 // The method data pointer needs to be updated to reflect the new target.
1559 update_mdp_by_constant(mdp,
1560 in_bytes(VirtualCallData::
1561 virtual_call_data_size()));
1562 bind(profile_continue);
1563 }
1564 }
1565
1566
1567 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1568 Register mdp,
1569 Register reg2,
1570 bool receiver_can_be_null) {
1571 if (ProfileInterpreter) {
1572 Label profile_continue;
1573
1574 // If no method data exists, go to profile_continue.
1575 test_method_data_pointer(mdp, profile_continue);
1576
1577 Label skip_receiver_profile;
1578 if (receiver_can_be_null) {
1579 Label not_null;
1580 testptr(receiver, receiver);
1581 jccb(Assembler::notZero, not_null);
1582 // We are making a call. Increment the count for null receiver.
1583 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1584 jmp(skip_receiver_profile);
1585 bind(not_null);
1586 }
1587
1588 // Record the receiver type.
1589 record_klass_in_profile(receiver, mdp, reg2, true);
1590 bind(skip_receiver_profile);
1591
1592 // The method data pointer needs to be updated to reflect the new target.
1593 #if INCLUDE_JVMCI
1594 if (MethodProfileWidth == 0) {
1595 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1596 }
1597 #else // INCLUDE_JVMCI
1598 update_mdp_by_constant(mdp,
1599 in_bytes(VirtualCallData::
1600 virtual_call_data_size()));
1601 #endif // INCLUDE_JVMCI
1602 bind(profile_continue);
1603 }
1604 }
1605
1606 #if INCLUDE_JVMCI
1607 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1608 assert_different_registers(method, mdp, reg2);
1609 if (ProfileInterpreter && MethodProfileWidth > 0) {
1610 Label profile_continue;
1611
1612 // If no method data exists, go to profile_continue.
1613 test_method_data_pointer(mdp, profile_continue);
1614
1615 Label done;
1616 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1617 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1618 bind(done);
1619
1620 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1621 bind(profile_continue);
1622 }
1623 }
1624 #endif // INCLUDE_JVMCI
1625
1626 // This routine creates a state machine for updating the multi-row
1627 // type profile at a virtual call site (or other type-sensitive bytecode).
1628 // The machine visits each row (of receiver/count) until the receiver type
1629 // is found, or until it runs out of rows. At the same time, it remembers
1630 // the location of the first empty row. (An empty row records null for its
1631 // receiver, and can be allocated for a newly-observed receiver type.)
1632 // Because there are two degrees of freedom in the state, a simple linear
1633 // search will not work; it must be a decision tree. Hence this helper
1634 // function is recursive, to generate the required tree structured code.
1635 // It's the interpreter, so we are trading off code space for speed.
1636 // See below for example code.
1637 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1638 Register receiver, Register mdp,
1639 Register reg2, int start_row,
1640 Label& done, bool is_virtual_call) {
1641 if (TypeProfileWidth == 0) {
1642 if (is_virtual_call) {
1643 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1644 }
1645 #if INCLUDE_JVMCI
1646 else if (EnableJVMCI) {
1647 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1648 }
1649 #endif // INCLUDE_JVMCI
1650 } else {
1651 int non_profiled_offset = -1;
1652 if (is_virtual_call) {
1653 non_profiled_offset = in_bytes(CounterData::count_offset());
1654 }
1655 #if INCLUDE_JVMCI
1656 else if (EnableJVMCI) {
1657 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1658 }
1659 #endif // INCLUDE_JVMCI
1660
1661 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1662 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1663 }
1664 }
1665
1666 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1667 Register reg2, int start_row, Label& done, int total_rows,
1668 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1669 int non_profiled_offset) {
1670 int last_row = total_rows - 1;
1671 assert(start_row <= last_row, "must be work left to do");
1672 // Test this row for both the item and for null.
1673 // Take any of three different outcomes:
1674 // 1. found item => increment count and goto done
1675 // 2. found null => keep looking for case 1, maybe allocate this cell
1676 // 3. found something else => keep looking for cases 1 and 2
1677 // Case 3 is handled by a recursive call.
1678 for (int row = start_row; row <= last_row; row++) {
1679 Label next_test;
1680 bool test_for_null_also = (row == start_row);
1681
1682 // See if the item is item[n].
1683 int item_offset = in_bytes(item_offset_fn(row));
1684 test_mdp_data_at(mdp, item_offset, item,
1685 (test_for_null_also ? reg2 : noreg),
1686 next_test);
1687 // (Reg2 now contains the item from the CallData.)
1688
1689 // The item is item[n]. Increment count[n].
1690 int count_offset = in_bytes(item_count_offset_fn(row));
1691 increment_mdp_data_at(mdp, count_offset);
1692 jmp(done);
1693 bind(next_test);
1694
1695 if (test_for_null_also) {
1696 Label found_null;
1697 // Failed the equality check on item[n]... Test for null.
1698 testptr(reg2, reg2);
1699 if (start_row == last_row) {
1700 // The only thing left to do is handle the null case.
1701 if (non_profiled_offset >= 0) {
1702 jccb(Assembler::zero, found_null);
1703 // Item did not match any saved item and there is no empty row for it.
1704 // Increment total counter to indicate polymorphic case.
1705 increment_mdp_data_at(mdp, non_profiled_offset);
1706 jmp(done);
1707 bind(found_null);
1708 } else {
1709 jcc(Assembler::notZero, done);
1710 }
1711 break;
1712 }
1713 // Since null is rare, make it be the branch-taken case.
1714 jcc(Assembler::zero, found_null);
1715
1716 // Put all the "Case 3" tests here.
1717 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1718 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1719
1720 // Found a null. Keep searching for a matching item,
1721 // but remember that this is an empty (unused) slot.
1722 bind(found_null);
1723 }
1724 }
1725
1726 // In the fall-through case, we found no matching item, but we
1727 // observed the item[start_row] is NULL.
1728
1729 // Fill in the item field and increment the count.
1730 int item_offset = in_bytes(item_offset_fn(start_row));
1731 set_mdp_data_at(mdp, item_offset, item);
1732 int count_offset = in_bytes(item_count_offset_fn(start_row));
1733 movl(reg2, DataLayout::counter_increment);
1734 set_mdp_data_at(mdp, count_offset, reg2);
1735 if (start_row > 0) {
1736 jmp(done);
1737 }
1738 }
1739
1740 // Example state machine code for three profile rows:
1741 // // main copy of decision tree, rooted at row[1]
1742 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1743 // if (row[0].rec != NULL) {
1744 // // inner copy of decision tree, rooted at row[1]
1745 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1746 // if (row[1].rec != NULL) {
1747 // // degenerate decision tree, rooted at row[2]
1748 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1749 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1750 // row[2].init(rec); goto done;
1751 // } else {
1752 // // remember row[1] is empty
1753 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1754 // row[1].init(rec); goto done;
1755 // }
1756 // } else {
1757 // // remember row[0] is empty
1758 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1759 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1760 // row[0].init(rec); goto done;
1761 // }
1762 // done:
1763
1764 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1765 Register mdp, Register reg2,
1766 bool is_virtual_call) {
1767 assert(ProfileInterpreter, "must be profiling");
1768 Label done;
1769
1770 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1771
1772 bind (done);
1773 }
1774
1775 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1776 Register mdp) {
1777 if (ProfileInterpreter) {
1778 Label profile_continue;
1779 uint row;
1780
1781 // If no method data exists, go to profile_continue.
1782 test_method_data_pointer(mdp, profile_continue);
1783
1784 // Update the total ret count.
1785 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1786
1787 for (row = 0; row < RetData::row_limit(); row++) {
1788 Label next_test;
1789
1790 // See if return_bci is equal to bci[n]:
1791 test_mdp_data_at(mdp,
1792 in_bytes(RetData::bci_offset(row)),
1793 return_bci, noreg,
1794 next_test);
1795
1796 // return_bci is equal to bci[n]. Increment the count.
1797 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1798
1799 // The method data pointer needs to be updated to reflect the new target.
1800 update_mdp_by_offset(mdp,
1801 in_bytes(RetData::bci_displacement_offset(row)));
1802 jmp(profile_continue);
1803 bind(next_test);
1804 }
1805
1806 update_mdp_for_ret(return_bci);
1807
1808 bind(profile_continue);
1809 }
1810 }
1811
1812
1813 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1814 if (ProfileInterpreter) {
1815 Label profile_continue;
1816
1817 // If no method data exists, go to profile_continue.
1818 test_method_data_pointer(mdp, profile_continue);
1819
1820 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1821
1822 // The method data pointer needs to be updated.
1823 int mdp_delta = in_bytes(BitData::bit_data_size());
1824 if (TypeProfileCasts) {
1825 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1826 }
1827 update_mdp_by_constant(mdp, mdp_delta);
1828
1829 bind(profile_continue);
1830 }
1831 }
1832
1833
1834 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1835 if (ProfileInterpreter && TypeProfileCasts) {
1836 Label profile_continue;
1837
1838 // If no method data exists, go to profile_continue.
1839 test_method_data_pointer(mdp, profile_continue);
1840
1841 int count_offset = in_bytes(CounterData::count_offset());
1842 // Back up the address, since we have already bumped the mdp.
1843 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1844
1845 // *Decrement* the counter. We expect to see zero or small negatives.
1846 increment_mdp_data_at(mdp, count_offset, true);
1847
1848 bind (profile_continue);
1849 }
1850 }
1851
1852
1853 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1854 if (ProfileInterpreter) {
1855 Label profile_continue;
1856
1857 // If no method data exists, go to profile_continue.
1858 test_method_data_pointer(mdp, profile_continue);
1859
1860 // The method data pointer needs to be updated.
1861 int mdp_delta = in_bytes(BitData::bit_data_size());
1862 if (TypeProfileCasts) {
1863 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1864
1865 // Record the object type.
1866 record_klass_in_profile(klass, mdp, reg2, false);
1867 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1868 NOT_LP64(restore_locals();) // Restore EDI
1869 }
1870 update_mdp_by_constant(mdp, mdp_delta);
1871
1872 bind(profile_continue);
1873 }
1874 }
1875
1876
1877 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1878 if (ProfileInterpreter) {
1879 Label profile_continue;
1880
1881 // If no method data exists, go to profile_continue.
1882 test_method_data_pointer(mdp, profile_continue);
1883
1884 // Update the default case count
1885 increment_mdp_data_at(mdp,
1886 in_bytes(MultiBranchData::default_count_offset()));
1887
1888 // The method data pointer needs to be updated.
1889 update_mdp_by_offset(mdp,
1890 in_bytes(MultiBranchData::
1891 default_displacement_offset()));
1892
1893 bind(profile_continue);
1894 }
1895 }
1896
1897
1898 void InterpreterMacroAssembler::profile_switch_case(Register index,
1899 Register mdp,
1900 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 // Build the base (index * per_case_size_in_bytes()) +
1908 // case_array_offset_in_bytes()
1909 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1910 imulptr(index, reg2); // XXX l ?
1911 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1912
1913 // Update the case count
1914 increment_mdp_data_at(mdp,
1915 index,
1916 in_bytes(MultiBranchData::relative_count_offset()));
1917
1918 // The method data pointer needs to be updated.
1919 update_mdp_by_offset(mdp,
1920 index,
1921 in_bytes(MultiBranchData::
1922 relative_displacement_offset()));
1923
1924 bind(profile_continue);
1925 }
1926 }
1927
1928
1929
1930 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1931 if (state == atos) {
1932 MacroAssembler::verify_oop(reg);
1933 }
1934 }
1935
1936 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1937 #ifndef _LP64
1938 if ((state == ftos && UseSSE < 1) ||
1939 (state == dtos && UseSSE < 2)) {
1940 MacroAssembler::verify_FPU(stack_depth);
1941 }
1942 #endif
1943 }
1944
1945 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1946 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1947 int increment, Address mask,
1948 Register scratch, bool preloaded,
1949 Condition cond, Label* where) {
1950 if (!preloaded) {
1951 movl(scratch, counter_addr);
1952 }
1953 incrementl(scratch, increment);
1954 movl(counter_addr, scratch);
1955 andl(scratch, mask);
1956 jcc(cond, *where);
1957 }
1958
1959 void InterpreterMacroAssembler::notify_method_entry() {
1960 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1961 // track stack depth. If it is possible to enter interp_only_mode we add
1962 // the code to check if the event should be sent.
1963 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1964 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1965 if (JvmtiExport::can_post_interpreter_events()) {
1966 Label L;
1967 NOT_LP64(get_thread(rthread);)
1968 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1969 testl(rdx, rdx);
1970 jcc(Assembler::zero, L);
1971 call_VM(noreg, CAST_FROM_FN_PTR(address,
1972 InterpreterRuntime::post_method_entry));
1973 bind(L);
1974 }
1975
1976 {
1977 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1978 NOT_LP64(get_thread(rthread);)
1979 get_method(rarg);
1980 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1981 rthread, rarg);
1982 }
1983
1984 // RedefineClasses() tracing support for obsolete method entry
1985 if (log_is_enabled(Trace, redefine, class, obsolete)) {
1986 NOT_LP64(get_thread(rthread);)
1987 get_method(rarg);
1988 call_VM_leaf(
1989 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1990 rthread, rarg);
1991 }
1992 }
1993
1994
1995 void InterpreterMacroAssembler::notify_method_exit(
1996 TosState state, NotifyMethodExitMode mode) {
1997 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1998 // track stack depth. If it is possible to enter interp_only_mode we add
1999 // the code to check if the event should be sent.
2000 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2001 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2002 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2003 Label L;
2004 // Note: frame::interpreter_frame_result has a dependency on how the
2005 // method result is saved across the call to post_method_exit. If this
2006 // is changed then the interpreter_frame_result implementation will
2007 // need to be updated too.
2008
2009 // template interpreter will leave the result on the top of the stack.
2010 push(state);
2011 NOT_LP64(get_thread(rthread);)
2012 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2013 testl(rdx, rdx);
2014 jcc(Assembler::zero, L);
2015 call_VM(noreg,
2016 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2017 bind(L);
2018 pop(state);
2019 }
2020
2021 {
2022 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2023 push(state);
2024 NOT_LP64(get_thread(rthread);)
2025 get_method(rarg);
2026 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2027 rthread, rarg);
2028 pop(state);
2029 }
2030 }