1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "prims/jvmtiExport.hpp"
35 #include "prims/jvmtiThreadState.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/frame.inline.hpp"
39 #include "runtime/safepointMechanism.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/thread.inline.hpp"
42
43 // Implementation of InterpreterMacroAssembler
44
45 void InterpreterMacroAssembler::jump_to_entry(address entry) {
46 assert(entry, "Entry must have been generated by now");
47 jump(RuntimeAddress(entry));
48 }
49
50 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
51 Label update, next, none;
52
53 verify_oop(obj);
54
55 testptr(obj, obj);
56 jccb(Assembler::notZero, update);
57 orptr(mdo_addr, TypeEntries::null_seen);
58 jmpb(next);
59
60 bind(update);
61 load_klass(obj, obj);
62
63 xorptr(obj, mdo_addr);
64 testptr(obj, TypeEntries::type_klass_mask);
65 jccb(Assembler::zero, next); // klass seen before, nothing to
66 // do. The unknown bit may have been
67 // set already but no need to check.
68
69 testptr(obj, TypeEntries::type_unknown);
70 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
71
72 cmpptr(mdo_addr, 0);
73 jccb(Assembler::equal, none);
74 cmpptr(mdo_addr, TypeEntries::null_seen);
75 jccb(Assembler::equal, none);
76 // There is a chance that the checks above (re-reading profiling
77 // data from memory) fail if another thread has just set the
78 // profiling to this obj's klass
79 xorptr(obj, mdo_addr);
80 testptr(obj, TypeEntries::type_klass_mask);
81 jccb(Assembler::zero, next);
82
83 // different than before. Cannot keep accurate profile.
84 orptr(mdo_addr, TypeEntries::type_unknown);
85 jmpb(next);
86
87 bind(none);
88 // first time here. Set profile type.
89 movptr(mdo_addr, obj);
90
91 bind(next);
92 }
93
94 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
95 if (!ProfileInterpreter) {
96 return;
97 }
98
99 if (MethodData::profile_arguments() || MethodData::profile_return()) {
100 Label profile_continue;
101
102 test_method_data_pointer(mdp, profile_continue);
103
104 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
105
106 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
107 jcc(Assembler::notEqual, profile_continue);
108
109 if (MethodData::profile_arguments()) {
110 Label done;
111 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
112 addptr(mdp, off_to_args);
113
114 for (int i = 0; i < TypeProfileArgsLimit; i++) {
115 if (i > 0 || MethodData::profile_return()) {
116 // If return value type is profiled we may have no argument to profile
117 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
118 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
119 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
120 jcc(Assembler::less, done);
121 }
122 movptr(tmp, Address(callee, Method::const_offset()));
123 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
124 // stack offset o (zero based) from the start of the argument
125 // list, for n arguments translates into offset n - o - 1 from
126 // the end of the argument list
127 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
128 subl(tmp, 1);
129 Address arg_addr = argument_address(tmp);
130 movptr(tmp, arg_addr);
131
132 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
133 profile_obj_type(tmp, mdo_arg_addr);
134
135 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
136 addptr(mdp, to_add);
137 off_to_args += to_add;
138 }
139
140 if (MethodData::profile_return()) {
141 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
142 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
143 }
144
145 bind(done);
146
147 if (MethodData::profile_return()) {
148 // We're right after the type profile for the last
149 // argument. tmp is the number of cells left in the
150 // CallTypeData/VirtualCallTypeData to reach its end. Non null
151 // if there's a return to profile.
152 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
153 shll(tmp, exact_log2(DataLayout::cell_size));
154 addptr(mdp, tmp);
155 }
156 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
157 } else {
158 assert(MethodData::profile_return(), "either profile call args or call ret");
159 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
160 }
161
162 // mdp points right after the end of the
163 // CallTypeData/VirtualCallTypeData, right after the cells for the
164 // return value type if there's one
165
166 bind(profile_continue);
167 }
168 }
169
170 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
171 assert_different_registers(mdp, ret, tmp, _bcp_register);
172 if (ProfileInterpreter && MethodData::profile_return()) {
173 Label profile_continue, done;
174
175 test_method_data_pointer(mdp, profile_continue);
176
177 if (MethodData::profile_return_jsr292_only()) {
178 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
179
180 // If we don't profile all invoke bytecodes we must make sure
181 // it's a bytecode we indeed profile. We can't go back to the
182 // begining of the ProfileData we intend to update to check its
183 // type because we're right after it and we don't known its
184 // length
185 Label do_profile;
186 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
187 jcc(Assembler::equal, do_profile);
188 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
189 jcc(Assembler::equal, do_profile);
190 get_method(tmp);
191 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
192 jcc(Assembler::notEqual, profile_continue);
193
194 bind(do_profile);
195 }
196
197 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
198 mov(tmp, ret);
199 profile_obj_type(tmp, mdo_ret_addr);
200
201 bind(profile_continue);
202 }
203 }
204
205 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
206 if (ProfileInterpreter && MethodData::profile_parameters()) {
207 Label profile_continue, done;
208
209 test_method_data_pointer(mdp, profile_continue);
210
211 // Load the offset of the area within the MDO used for
212 // parameters. If it's negative we're not profiling any parameters
213 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
214 testl(tmp1, tmp1);
215 jcc(Assembler::negative, profile_continue);
216
217 // Compute a pointer to the area for parameters from the offset
218 // and move the pointer to the slot for the last
219 // parameters. Collect profiling from last parameter down.
220 // mdo start + parameters offset + array length - 1
221 addptr(mdp, tmp1);
222 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
223 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
224
225 Label loop;
226 bind(loop);
227
228 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
229 int type_base = in_bytes(ParametersTypeData::type_offset(0));
230 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
231 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
232 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
233
234 // load offset on the stack from the slot for this parameter
235 movptr(tmp2, arg_off);
236 negptr(tmp2);
237 // read the parameter from the local area
238 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
239
240 // profile the parameter
241 profile_obj_type(tmp2, arg_type);
242
243 // go to next parameter
244 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
245 jcc(Assembler::positive, loop);
246
247 bind(profile_continue);
248 }
249 }
250
251 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
252 int number_of_arguments) {
253 // interpreter specific
254 //
255 // Note: No need to save/restore bcp & locals registers
256 // since these are callee saved registers and no blocking/
257 // GC can happen in leaf calls.
258 // Further Note: DO NOT save/restore bcp/locals. If a caller has
259 // already saved them so that it can use rsi/rdi as temporaries
260 // then a save/restore here will DESTROY the copy the caller
261 // saved! There used to be a save_bcp() that only happened in
262 // the ASSERT path (no restore_bcp). Which caused bizarre failures
263 // when jvm built with ASSERTs.
264 #ifdef ASSERT
265 {
266 Label L;
267 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
268 jcc(Assembler::equal, L);
269 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
270 " last_sp != NULL");
271 bind(L);
272 }
273 #endif
274 // super call
275 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
276 // interpreter specific
277 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
278 // but since they may not have been saved (and we don't want to
279 // save them here (see note above) the assert is invalid.
280 }
281
282 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
283 Register java_thread,
284 Register last_java_sp,
285 address entry_point,
286 int number_of_arguments,
287 bool check_exceptions) {
288 // interpreter specific
289 //
290 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
291 // really make a difference for these runtime calls, since they are
292 // slow anyway. Btw., bcp must be saved/restored since it may change
293 // due to GC.
294 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
295 save_bcp();
296 #ifdef ASSERT
297 {
298 Label L;
299 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
300 jcc(Assembler::equal, L);
301 stop("InterpreterMacroAssembler::call_VM_base:"
302 " last_sp != NULL");
303 bind(L);
304 }
305 #endif /* ASSERT */
306 // super call
307 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
308 entry_point, number_of_arguments,
309 check_exceptions);
310 // interpreter specific
311 restore_bcp();
312 restore_locals();
313 }
314
315 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
316 if (JvmtiExport::can_pop_frame()) {
317 Label L;
318 // Initiate popframe handling only if it is not already being
319 // processed. If the flag has the popframe_processing bit set, it
320 // means that this code is called *during* popframe handling - we
321 // don't want to reenter.
322 // This method is only called just after the call into the vm in
323 // call_VM_base, so the arg registers are available.
324 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
325 LP64_ONLY(c_rarg0);
326 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
327 testl(pop_cond, JavaThread::popframe_pending_bit);
328 jcc(Assembler::zero, L);
329 testl(pop_cond, JavaThread::popframe_processing_bit);
330 jcc(Assembler::notZero, L);
331 // Call Interpreter::remove_activation_preserving_args_entry() to get the
332 // address of the same-named entrypoint in the generated interpreter code.
333 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
334 jmp(rax);
335 bind(L);
336 NOT_LP64(get_thread(java_thread);)
337 }
338 }
339
340 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
341 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
342 NOT_LP64(get_thread(thread);)
343 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
344 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
345 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
346 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
347 #ifdef _LP64
348 switch (state) {
349 case atos: movptr(rax, oop_addr);
350 movptr(oop_addr, (int32_t)NULL_WORD);
351 verify_oop(rax, state); break;
352 case ltos: movptr(rax, val_addr); break;
353 case btos: // fall through
354 case ztos: // fall through
355 case ctos: // fall through
356 case stos: // fall through
357 case itos: movl(rax, val_addr); break;
358 case ftos: load_float(val_addr); break;
359 case dtos: load_double(val_addr); break;
360 case vtos: /* nothing to do */ break;
361 default : ShouldNotReachHere();
362 }
363 // Clean up tos value in the thread object
364 movl(tos_addr, (int) ilgl);
365 movl(val_addr, (int32_t) NULL_WORD);
366 #else
367 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
368 + in_ByteSize(wordSize));
369 switch (state) {
370 case atos: movptr(rax, oop_addr);
371 movptr(oop_addr, NULL_WORD);
372 verify_oop(rax, state); break;
373 case ltos:
374 movl(rdx, val_addr1); // fall through
375 case btos: // fall through
376 case ztos: // fall through
377 case ctos: // fall through
378 case stos: // fall through
379 case itos: movl(rax, val_addr); break;
380 case ftos: load_float(val_addr); break;
381 case dtos: load_double(val_addr); break;
382 case vtos: /* nothing to do */ break;
383 default : ShouldNotReachHere();
384 }
385 #endif // _LP64
386 // Clean up tos value in the thread object
387 movl(tos_addr, (int32_t) ilgl);
388 movptr(val_addr, NULL_WORD);
389 NOT_LP64(movptr(val_addr1, NULL_WORD);)
390 }
391
392
393 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
394 if (JvmtiExport::can_force_early_return()) {
395 Label L;
396 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
397 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
398
399 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
400 testptr(tmp, tmp);
401 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
402
403 // Initiate earlyret handling only if it is not already being processed.
404 // If the flag has the earlyret_processing bit set, it means that this code
405 // is called *during* earlyret handling - we don't want to reenter.
406 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
407 cmpl(tmp, JvmtiThreadState::earlyret_pending);
408 jcc(Assembler::notEqual, L);
409
410 // Call Interpreter::remove_activation_early_entry() to get the address of the
411 // same-named entrypoint in the generated interpreter code.
412 NOT_LP64(get_thread(java_thread);)
413 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
414 #ifdef _LP64
415 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
416 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
417 #else
418 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
419 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
420 #endif // _LP64
421 jmp(rax);
422 bind(L);
423 NOT_LP64(get_thread(java_thread);)
424 }
425 }
426
427 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
428 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
429 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
430 bswapl(reg);
431 shrl(reg, 16);
432 }
433
434 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
435 int bcp_offset,
436 size_t index_size) {
437 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
438 if (index_size == sizeof(u2)) {
439 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
440 } else if (index_size == sizeof(u4)) {
441 movl(index, Address(_bcp_register, bcp_offset));
442 // Check if the secondary index definition is still ~x, otherwise
443 // we have to change the following assembler code to calculate the
444 // plain index.
445 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
446 notl(index); // convert to plain index
447 } else if (index_size == sizeof(u1)) {
448 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
449 } else {
450 ShouldNotReachHere();
451 }
452 }
453
454 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
455 Register index,
456 int bcp_offset,
457 size_t index_size) {
458 assert_different_registers(cache, index);
459 get_cache_index_at_bcp(index, bcp_offset, index_size);
460 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
461 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
462 // convert from field index to ConstantPoolCacheEntry index
463 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
464 shll(index, 2);
465 }
466
467 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
468 Register index,
469 Register bytecode,
470 int byte_no,
471 int bcp_offset,
472 size_t index_size) {
473 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
474 // We use a 32-bit load here since the layout of 64-bit words on
475 // little-endian machines allow us that.
476 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
477 const int shift_count = (1 + byte_no) * BitsPerByte;
478 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
479 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
480 "correct shift count");
481 shrl(bytecode, shift_count);
482 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
483 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
484 }
485
486 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
487 Register tmp,
488 int bcp_offset,
489 size_t index_size) {
490 assert(cache != tmp, "must use different register");
491 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
492 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
493 // convert from field index to ConstantPoolCacheEntry index
494 // and from word offset to byte offset
495 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
496 shll(tmp, 2 + LogBytesPerWord);
497 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
498 // skip past the header
499 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
500 addptr(cache, tmp); // construct pointer to cache entry
501 }
502
503 // Load object from cpool->resolved_references(index)
504 void InterpreterMacroAssembler::load_resolved_reference_at_index(
505 Register result, Register index, Register tmp) {
506 assert_different_registers(result, index);
507
508 get_constant_pool(result);
509 // load pointer for resolved_references[] objArray
510 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
511 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
512 resolve_oop_handle(result, tmp);
513 load_heap_oop(result, Address(result, index,
514 UseCompressedOops ? Address::times_4 : Address::times_ptr,
515 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
516 }
517
518 // load cpool->resolved_klass_at(index)
519 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool,
520 Register index, Register klass) {
521 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
522 Register resolved_klasses = cpool;
523 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
524 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
525 }
526
527 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
528 // subtype of super_klass.
529 //
530 // Args:
531 // rax: superklass
532 // Rsub_klass: subklass
533 //
534 // Kills:
535 // rcx, rdi
536 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
537 Label& ok_is_subtype) {
538 assert(Rsub_klass != rax, "rax holds superklass");
539 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
540 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
541 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
542 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
543
544 // Profile the not-null value's klass.
545 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
546
547 // Do the check.
548 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
549
550 // Profile the failure of the check.
551 profile_typecheck_failed(rcx); // blows rcx
552 }
553
554
555 #ifndef _LP64
556 void InterpreterMacroAssembler::f2ieee() {
557 if (IEEEPrecision) {
558 fstp_s(Address(rsp, 0));
559 fld_s(Address(rsp, 0));
560 }
561 }
562
563
564 void InterpreterMacroAssembler::d2ieee() {
565 if (IEEEPrecision) {
566 fstp_d(Address(rsp, 0));
567 fld_d(Address(rsp, 0));
568 }
569 }
570 #endif // _LP64
571
572 // Java Expression Stack
573
574 void InterpreterMacroAssembler::pop_ptr(Register r) {
575 pop(r);
576 }
577
578 void InterpreterMacroAssembler::push_ptr(Register r) {
579 push(r);
580 }
581
582 void InterpreterMacroAssembler::push_i(Register r) {
583 push(r);
584 }
585
586 void InterpreterMacroAssembler::push_f(XMMRegister r) {
587 subptr(rsp, wordSize);
588 movflt(Address(rsp, 0), r);
589 }
590
591 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
592 movflt(r, Address(rsp, 0));
593 addptr(rsp, wordSize);
594 }
595
596 void InterpreterMacroAssembler::push_d(XMMRegister r) {
597 subptr(rsp, 2 * wordSize);
598 movdbl(Address(rsp, 0), r);
599 }
600
601 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
602 movdbl(r, Address(rsp, 0));
603 addptr(rsp, 2 * Interpreter::stackElementSize);
604 }
605
606 #ifdef _LP64
607 void InterpreterMacroAssembler::pop_i(Register r) {
608 // XXX can't use pop currently, upper half non clean
609 movl(r, Address(rsp, 0));
610 addptr(rsp, wordSize);
611 }
612
613 void InterpreterMacroAssembler::pop_l(Register r) {
614 movq(r, Address(rsp, 0));
615 addptr(rsp, 2 * Interpreter::stackElementSize);
616 }
617
618 void InterpreterMacroAssembler::push_l(Register r) {
619 subptr(rsp, 2 * wordSize);
620 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
621 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
622 }
623
624 void InterpreterMacroAssembler::pop(TosState state) {
625 switch (state) {
626 case atos: pop_ptr(); break;
627 case btos:
628 case ztos:
629 case ctos:
630 case stos:
631 case itos: pop_i(); break;
632 case ltos: pop_l(); break;
633 case ftos: pop_f(xmm0); break;
634 case dtos: pop_d(xmm0); break;
635 case vtos: /* nothing to do */ break;
636 default: ShouldNotReachHere();
637 }
638 verify_oop(rax, state);
639 }
640
641 void InterpreterMacroAssembler::push(TosState state) {
642 verify_oop(rax, state);
643 switch (state) {
644 case atos: push_ptr(); break;
645 case btos:
646 case ztos:
647 case ctos:
648 case stos:
649 case itos: push_i(); break;
650 case ltos: push_l(); break;
651 case ftos: push_f(xmm0); break;
652 case dtos: push_d(xmm0); break;
653 case vtos: /* nothing to do */ break;
654 default : ShouldNotReachHere();
655 }
656 }
657 #else
658 void InterpreterMacroAssembler::pop_i(Register r) {
659 pop(r);
660 }
661
662 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
663 pop(lo);
664 pop(hi);
665 }
666
667 void InterpreterMacroAssembler::pop_f() {
668 fld_s(Address(rsp, 0));
669 addptr(rsp, 1 * wordSize);
670 }
671
672 void InterpreterMacroAssembler::pop_d() {
673 fld_d(Address(rsp, 0));
674 addptr(rsp, 2 * wordSize);
675 }
676
677
678 void InterpreterMacroAssembler::pop(TosState state) {
679 switch (state) {
680 case atos: pop_ptr(rax); break;
681 case btos: // fall through
682 case ztos: // fall through
683 case ctos: // fall through
684 case stos: // fall through
685 case itos: pop_i(rax); break;
686 case ltos: pop_l(rax, rdx); break;
687 case ftos:
688 if (UseSSE >= 1) {
689 pop_f(xmm0);
690 } else {
691 pop_f();
692 }
693 break;
694 case dtos:
695 if (UseSSE >= 2) {
696 pop_d(xmm0);
697 } else {
698 pop_d();
699 }
700 break;
701 case vtos: /* nothing to do */ break;
702 default : ShouldNotReachHere();
703 }
704 verify_oop(rax, state);
705 }
706
707
708 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
709 push(hi);
710 push(lo);
711 }
712
713 void InterpreterMacroAssembler::push_f() {
714 // Do not schedule for no AGI! Never write beyond rsp!
715 subptr(rsp, 1 * wordSize);
716 fstp_s(Address(rsp, 0));
717 }
718
719 void InterpreterMacroAssembler::push_d() {
720 // Do not schedule for no AGI! Never write beyond rsp!
721 subptr(rsp, 2 * wordSize);
722 fstp_d(Address(rsp, 0));
723 }
724
725
726 void InterpreterMacroAssembler::push(TosState state) {
727 verify_oop(rax, state);
728 switch (state) {
729 case atos: push_ptr(rax); break;
730 case btos: // fall through
731 case ztos: // fall through
732 case ctos: // fall through
733 case stos: // fall through
734 case itos: push_i(rax); break;
735 case ltos: push_l(rax, rdx); break;
736 case ftos:
737 if (UseSSE >= 1) {
738 push_f(xmm0);
739 } else {
740 push_f();
741 }
742 break;
743 case dtos:
744 if (UseSSE >= 2) {
745 push_d(xmm0);
746 } else {
747 push_d();
748 }
749 break;
750 case vtos: /* nothing to do */ break;
751 default : ShouldNotReachHere();
752 }
753 }
754 #endif // _LP64
755
756
757 // Helpers for swap and dup
758 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
759 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
760 }
761
762 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
763 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
764 }
765
766
767 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
768 // set sender sp
769 lea(_bcp_register, Address(rsp, wordSize));
770 // record last_sp
771 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
772 }
773
774
775 // Jump to from_interpreted entry of a call unless single stepping is possible
776 // in this thread in which case we must call the i2i entry
777 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
778 prepare_to_jump_from_interpreted();
779
780 if (JvmtiExport::can_post_interpreter_events()) {
781 Label run_compiled_code;
782 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
783 // compiled code in threads for which the event is enabled. Check here for
784 // interp_only_mode if these events CAN be enabled.
785 // interp_only is an int, on little endian it is sufficient to test the byte only
786 // Is a cmpl faster?
787 LP64_ONLY(temp = r15_thread;)
788 NOT_LP64(get_thread(temp);)
789 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
790 jccb(Assembler::zero, run_compiled_code);
791 jmp(Address(method, Method::interpreter_entry_offset()));
792 bind(run_compiled_code);
793 }
794
795 jmp(Address(method, Method::from_interpreted_offset()));
796 }
797
798 // void InterpreterMacroAssembler::resolve_special(Register rmethod, LinkInfo link_info) {
799 // CallInfo callinfo;
800 // LinkResolver::resolve_special_call(callinfo, Handle(), link_info, Thread::current());
801 // methodHandle methodh = callinfo.selected_method();
802 // assert(methodh.not_null(), "should have thrown exception");
803 // Method* method = methodh();
804 // tty->print_cr("call_Java_final method: %p name: %s", method, method->name()->as_C_string());
805 // // tty->print_cr("call_Java_final const: %p, params: %d locals %d", method->constMethod(), method->constMethod()->_size_of_parameters, method->constMethod()->_max_locals);
806
807 // movptr(rmethod, AddressLiteral((address)method, RelocationHolder::none).addr());
808 // }
809
810 // void InterpreterMacroAssembler::get_entry(Register entry, Register method) {
811 // // TODO: see InterpreterMacroAssembler::jump_from_interpreted for special cases
812 // Label done;
813 // // if (JvmtiExport::can_post_interpreter_events()) {
814 // // Register temp;
815 // // Label run_compiled_code;
816 // // // JVMTI events, such as single-stepping, are implemented partly by avoiding running
817 // // // compiled code in threads for which the event is enabled. Check here for
818 // // // interp_only_mode if these events CAN be enabled.
819 // // // interp_only is an int, on little endian it is sufficient to test the byte only
820 // // // Is a cmpl faster?
821 // // LP64_ONLY(temp = r15_thread;)
822 // // NOT_LP64(get_thread(temp);)
823 // // cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
824 // // jccb(Assembler::zero, run_compiled_code);
825 // // movptr(entry, Address(method, Method::interpreter_entry_offset()));
826 // // bind(run_compiled_code);
827 // // }
828 // movptr(entry, Address(method, Method::from_interpreted_offset()));
829 // bind(done);
830 // }
831
832 // // loads method into rbx
833 // void InterpreterMacroAssembler::get_entry(Register entry, LinkInfo link_info) {
834 // resolve_special(rbx, link_info);
835 // get_entry(entry, rbx);
836 // }
837
838 // void InterpreterMacroAssembler::call_Java_final(LinkInfo link_info) {
839 // Register rentry = rax;
840 // get_entry(rentry, link_info);
841
842 // // profile_call(rax); // ?? rax
843 // // profile_arguments_type(rax, rbx, rbcp, false);
844 // call(rentry);
845 // }
846
847 // void InterpreterMacroAssembler::jump_Java_final(LinkInfo link_info) {
848 // Register rentry = rax;
849 // get_entry(rentry, link_info);
850
851 // // profile_call(rax); // ?? rax
852 // // profile_arguments_type(rax, rbx, rbcp, false);
853 // jmp(rentry);
854 // }
855
856 // The following two routines provide a hook so that an implementation
857 // can schedule the dispatch in two parts. x86 does not do this.
858 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
859 // Nothing x86 specific to be done here
860 }
861
862 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
863 dispatch_next(state, step);
864 }
865
866 void InterpreterMacroAssembler::dispatch_base(TosState state,
867 address* table,
868 bool verifyoop,
869 bool generate_poll) {
870 verify_FPU(1, state);
871 if (VerifyActivationFrameSize) {
872 Label L;
873 mov(rcx, rbp);
874 subptr(rcx, rsp);
875 int32_t min_frame_size =
876 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
877 wordSize;
878 cmpptr(rcx, (int32_t)min_frame_size);
879 jcc(Assembler::greaterEqual, L);
880 stop("broken stack frame");
881 bind(L);
882 }
883 if (verifyoop) {
884 verify_oop(rax, state);
885 }
886
887 address* const safepoint_table = Interpreter::safept_table(state);
888 #ifdef _LP64
889 Label no_safepoint, dispatch;
890 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
891 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
892 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
893
894 jccb(Assembler::zero, no_safepoint);
895 lea(rscratch1, ExternalAddress((address)safepoint_table));
896 jmpb(dispatch);
897 }
898
899 bind(no_safepoint);
900 lea(rscratch1, ExternalAddress((address)table));
901 bind(dispatch);
902 jmp(Address(rscratch1, rbx, Address::times_8));
903
904 #else
905 Address index(noreg, rbx, Address::times_ptr);
906 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
907 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
908 Label no_safepoint;
909 const Register thread = rcx;
910 get_thread(thread);
911 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
912
913 jccb(Assembler::zero, no_safepoint);
914 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
915 jump(dispatch_addr);
916 bind(no_safepoint);
917 }
918
919 {
920 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
921 jump(dispatch_addr);
922 }
923 #endif // _LP64
924 }
925
926 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
927 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
928 }
929
930 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
931 dispatch_base(state, Interpreter::normal_table(state));
932 }
933
934 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
935 dispatch_base(state, Interpreter::normal_table(state), false);
936 }
937
938
939 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
940 // load next bytecode (load before advancing _bcp_register to prevent AGI)
941 load_unsigned_byte(rbx, Address(_bcp_register, step));
942 // advance _bcp_register
943 increment(_bcp_register, step);
944 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
945 }
946
947 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
948 // load current bytecode
949 load_unsigned_byte(rbx, Address(_bcp_register, 0));
950 dispatch_base(state, table);
951 }
952
953 void InterpreterMacroAssembler::narrow(Register result) {
954
955 // Get method->_constMethod->_result_type
956 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
957 movptr(rcx, Address(rcx, Method::const_offset()));
958 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
959
960 Label done, notBool, notByte, notChar;
961
962 // common case first
963 cmpl(rcx, T_INT);
964 jcc(Assembler::equal, done);
965
966 // mask integer result to narrower return type.
967 cmpl(rcx, T_BOOLEAN);
968 jcc(Assembler::notEqual, notBool);
969 andl(result, 0x1);
970 jmp(done);
971
972 bind(notBool);
973 cmpl(rcx, T_BYTE);
974 jcc(Assembler::notEqual, notByte);
975 LP64_ONLY(movsbl(result, result);)
976 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
977 NOT_LP64(sarl(result, 24);) // and sign-extend byte
978 jmp(done);
979
980 bind(notByte);
981 cmpl(rcx, T_CHAR);
982 jcc(Assembler::notEqual, notChar);
983 LP64_ONLY(movzwl(result, result);)
984 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
985 jmp(done);
986
987 bind(notChar);
988 // cmpl(rcx, T_SHORT); // all that's left
989 // jcc(Assembler::notEqual, done);
990 LP64_ONLY(movswl(result, result);)
991 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
992 NOT_LP64(sarl(result, 16);) // and sign-extend short
993
994 // Nothing to do for T_INT
995 bind(done);
996 }
997
998 // remove activation
999 //
1000 // Unlock the receiver if this is a synchronized method.
1001 // Unlock any Java monitors from syncronized blocks.
1002 // Remove the activation from the stack.
1003 //
1004 // If there are locked Java monitors
1005 // If throw_monitor_exception
1006 // throws IllegalMonitorStateException
1007 // Else if install_monitor_exception
1008 // installs IllegalMonitorStateException
1009 // Else
1010 // no error processing
1011 void InterpreterMacroAssembler::remove_activation(
1012 TosState state,
1013 Register ret_addr,
1014 bool throw_monitor_exception,
1015 bool install_monitor_exception,
1016 bool notify_jvmdi) {
1017 // Note: Registers rdx xmm0 may be in use for the
1018 // result check if synchronized method
1019 Label unlocked, unlock, no_unlock;
1020
1021 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1022 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
1023 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
1024 // monitor pointers need different register
1025 // because rdx may have the result in it
1026 NOT_LP64(get_thread(rcx);)
1027
1028 // get the value of _do_not_unlock_if_synchronized into rdx
1029 const Address do_not_unlock_if_synchronized(rthread,
1030 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1031 movbool(rbx, do_not_unlock_if_synchronized);
1032 movbool(do_not_unlock_if_synchronized, false); // reset the flag
1033
1034 // get method access flags
1035 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1036 movl(rcx, Address(rcx, Method::access_flags_offset()));
1037 testl(rcx, JVM_ACC_SYNCHRONIZED);
1038 jcc(Assembler::zero, unlocked);
1039
1040 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
1041 // is set.
1042 testbool(rbx);
1043 jcc(Assembler::notZero, no_unlock);
1044
1045 // unlock monitor
1046 push(state); // save result
1047
1048 // BasicObjectLock will be first in list, since this is a
1049 // synchronized method. However, need to check that the object has
1050 // not been unlocked by an explicit monitorexit bytecode.
1051 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
1052 wordSize - (int) sizeof(BasicObjectLock));
1053 // We use c_rarg1/rdx so that if we go slow path it will be the correct
1054 // register for unlock_object to pass to VM directly
1055 lea(robj, monitor); // address of first monitor
1056
1057 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1058 testptr(rax, rax);
1059 jcc(Assembler::notZero, unlock);
1060
1061 pop(state);
1062 if (throw_monitor_exception) {
1063 // Entry already unlocked, need to throw exception
1064 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1065 call_VM(noreg, CAST_FROM_FN_PTR(address,
1066 InterpreterRuntime::throw_illegal_monitor_state_exception));
1067 should_not_reach_here();
1068 } else {
1069 // Monitor already unlocked during a stack unroll. If requested,
1070 // install an illegal_monitor_state_exception. Continue with
1071 // stack unrolling.
1072 if (install_monitor_exception) {
1073 NOT_LP64(empty_FPU_stack();)
1074 call_VM(noreg, CAST_FROM_FN_PTR(address,
1075 InterpreterRuntime::new_illegal_monitor_state_exception));
1076 }
1077 jmp(unlocked);
1078 }
1079
1080 bind(unlock);
1081 unlock_object(robj);
1082 pop(state);
1083
1084 // Check that for block-structured locking (i.e., that all locked
1085 // objects has been unlocked)
1086 bind(unlocked);
1087
1088 // rax, rdx: Might contain return value
1089
1090 // Check that all monitors are unlocked
1091 {
1092 Label loop, exception, entry, restart;
1093 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1094 const Address monitor_block_top(
1095 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1096 const Address monitor_block_bot(
1097 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1098
1099 bind(restart);
1100 // We use c_rarg1 so that if we go slow path it will be the correct
1101 // register for unlock_object to pass to VM directly
1102 movptr(rmon, monitor_block_top); // points to current entry, starting
1103 // with top-most entry
1104 lea(rbx, monitor_block_bot); // points to word before bottom of
1105 // monitor block
1106 jmp(entry);
1107
1108 // Entry already locked, need to throw exception
1109 bind(exception);
1110
1111 if (throw_monitor_exception) {
1112 // Throw exception
1113 NOT_LP64(empty_FPU_stack();)
1114 MacroAssembler::call_VM(noreg,
1115 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1116 throw_illegal_monitor_state_exception));
1117 should_not_reach_here();
1118 } else {
1119 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1120 // Unlock does not block, so don't have to worry about the frame.
1121 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1122
1123 push(state);
1124 mov(robj, rmon); // nop if robj and rmon are the same
1125 unlock_object(robj);
1126 pop(state);
1127
1128 if (install_monitor_exception) {
1129 NOT_LP64(empty_FPU_stack();)
1130 call_VM(noreg, CAST_FROM_FN_PTR(address,
1131 InterpreterRuntime::
1132 new_illegal_monitor_state_exception));
1133 }
1134
1135 jmp(restart);
1136 }
1137
1138 bind(loop);
1139 // check if current entry is used
1140 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
1141 jcc(Assembler::notEqual, exception);
1142
1143 addptr(rmon, entry_size); // otherwise advance to next entry
1144 bind(entry);
1145 cmpptr(rmon, rbx); // check if bottom reached
1146 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1147 }
1148
1149 bind(no_unlock);
1150
1151 // jvmti support
1152 if (notify_jvmdi) {
1153 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1154 } else {
1155 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1156 }
1157
1158 // remove activation
1159 // get sender sp
1160 movptr(rbx,
1161 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1162 if (StackReservedPages > 0) {
1163 // testing if reserved zone needs to be re-enabled
1164 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1165 Label no_reserved_zone_enabling;
1166
1167 NOT_LP64(get_thread(rthread);)
1168
1169 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1170 jcc(Assembler::equal, no_reserved_zone_enabling);
1171
1172 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1173 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1174
1175 call_VM_leaf(
1176 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1177 call_VM(noreg, CAST_FROM_FN_PTR(address,
1178 InterpreterRuntime::throw_delayed_StackOverflowError));
1179 should_not_reach_here();
1180
1181 bind(no_reserved_zone_enabling);
1182 }
1183 leave(); // remove frame anchor
1184 pop(ret_addr); // get return address
1185 mov(rsp, rbx); // set sp to sender sp
1186 }
1187
1188 void InterpreterMacroAssembler::get_method_counters(Register method,
1189 Register mcs, Label& skip) {
1190 Label has_counters;
1191 movptr(mcs, Address(method, Method::method_counters_offset()));
1192 testptr(mcs, mcs);
1193 jcc(Assembler::notZero, has_counters);
1194 call_VM(noreg, CAST_FROM_FN_PTR(address,
1195 InterpreterRuntime::build_method_counters), method);
1196 movptr(mcs, Address(method,Method::method_counters_offset()));
1197 testptr(mcs, mcs);
1198 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1199 bind(has_counters);
1200 }
1201
1202
1203 // Lock object
1204 //
1205 // Args:
1206 // rdx, c_rarg1: BasicObjectLock to be used for locking
1207 //
1208 // Kills:
1209 // rax, rbx
1210 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1211 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1212 "The argument is only for looks. It must be c_rarg1");
1213
1214 if (UseHeavyMonitors) {
1215 call_VM(noreg,
1216 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1217 lock_reg);
1218 } else {
1219 Label done;
1220
1221 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1222 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1223 // problematic case where tmp_reg = no_reg.
1224 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1225
1226 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1227 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1228 const int mark_offset = lock_offset +
1229 BasicLock::displaced_header_offset_in_bytes();
1230
1231 Label slow_case;
1232
1233 // Load object pointer into obj_reg
1234 movptr(obj_reg, Address(lock_reg, obj_offset));
1235
1236 if (UseBiasedLocking) {
1237 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1238 }
1239
1240 // Load immediate 1 into swap_reg %rax
1241 movl(swap_reg, (int32_t)1);
1242
1243 // Load (object->mark() | 1) into swap_reg %rax
1244 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1245
1246 // Save (object->mark() | 1) into BasicLock's displaced header
1247 movptr(Address(lock_reg, mark_offset), swap_reg);
1248
1249 assert(lock_offset == 0,
1250 "displaced header must be first word in BasicObjectLock");
1251
1252 if (os::is_MP()) lock();
1253 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1254 if (PrintBiasedLockingStatistics) {
1255 cond_inc32(Assembler::zero,
1256 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1257 }
1258 jcc(Assembler::zero, done);
1259
1260 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1261
1262 // Test if the oopMark is an obvious stack pointer, i.e.,
1263 // 1) (mark & zero_bits) == 0, and
1264 // 2) rsp <= mark < mark + os::pagesize()
1265 //
1266 // These 3 tests can be done by evaluating the following
1267 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1268 // assuming both stack pointer and pagesize have their
1269 // least significant bits clear.
1270 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1271 subptr(swap_reg, rsp);
1272 andptr(swap_reg, zero_bits - os::vm_page_size());
1273
1274 // Save the test result, for recursive case, the result is zero
1275 movptr(Address(lock_reg, mark_offset), swap_reg);
1276
1277 if (PrintBiasedLockingStatistics) {
1278 cond_inc32(Assembler::zero,
1279 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1280 }
1281 jcc(Assembler::zero, done);
1282
1283 bind(slow_case);
1284
1285 // Call the runtime routine for slow case
1286 call_VM(noreg,
1287 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1288 lock_reg);
1289
1290 bind(done);
1291 }
1292 }
1293
1294
1295 // Unlocks an object. Used in monitorexit bytecode and
1296 // remove_activation. Throws an IllegalMonitorException if object is
1297 // not locked by current thread.
1298 //
1299 // Args:
1300 // rdx, c_rarg1: BasicObjectLock for lock
1301 //
1302 // Kills:
1303 // rax
1304 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1305 // rscratch1 (scratch reg)
1306 // rax, rbx, rcx, rdx
1307 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1308 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1309 "The argument is only for looks. It must be c_rarg1");
1310
1311 if (UseHeavyMonitors) {
1312 call_VM(noreg,
1313 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1314 lock_reg);
1315 } else {
1316 Label done;
1317
1318 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1319 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1320 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1321
1322 save_bcp(); // Save in case of exception
1323
1324 // Convert from BasicObjectLock structure to object and BasicLock
1325 // structure Store the BasicLock address into %rax
1326 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1327
1328 // Load oop into obj_reg(%c_rarg3)
1329 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1330
1331 // Free entry
1332 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1333
1334 if (UseBiasedLocking) {
1335 biased_locking_exit(obj_reg, header_reg, done);
1336 }
1337
1338 // Load the old header from BasicLock structure
1339 movptr(header_reg, Address(swap_reg,
1340 BasicLock::displaced_header_offset_in_bytes()));
1341
1342 // Test for recursion
1343 testptr(header_reg, header_reg);
1344
1345 // zero for recursive case
1346 jcc(Assembler::zero, done);
1347
1348 // Atomic swap back the old header
1349 if (os::is_MP()) lock();
1350 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1351
1352 // zero for simple unlock of a stack-lock case
1353 jcc(Assembler::zero, done);
1354
1355 // Call the runtime routine for slow case.
1356 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1357 obj_reg); // restore obj
1358 call_VM(noreg,
1359 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1360 lock_reg);
1361
1362 bind(done);
1363
1364 restore_bcp();
1365 }
1366 }
1367
1368 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1369 Label& zero_continue) {
1370 assert(ProfileInterpreter, "must be profiling interpreter");
1371 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1372 testptr(mdp, mdp);
1373 jcc(Assembler::zero, zero_continue);
1374 }
1375
1376
1377 // Set the method data pointer for the current bcp.
1378 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1379 assert(ProfileInterpreter, "must be profiling interpreter");
1380 Label set_mdp;
1381 push(rax);
1382 push(rbx);
1383
1384 get_method(rbx);
1385 // Test MDO to avoid the call if it is NULL.
1386 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1387 testptr(rax, rax);
1388 jcc(Assembler::zero, set_mdp);
1389 // rbx: method
1390 // _bcp_register: bcp
1391 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1392 // rax: mdi
1393 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1394 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1395 addptr(rbx, in_bytes(MethodData::data_offset()));
1396 addptr(rax, rbx);
1397 bind(set_mdp);
1398 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1399 pop(rbx);
1400 pop(rax);
1401 }
1402
1403 void InterpreterMacroAssembler::verify_method_data_pointer() {
1404 assert(ProfileInterpreter, "must be profiling interpreter");
1405 #ifdef ASSERT
1406 Label verify_continue;
1407 push(rax);
1408 push(rbx);
1409 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1410 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1411 push(arg3_reg);
1412 push(arg2_reg);
1413 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1414 get_method(rbx);
1415
1416 // If the mdp is valid, it will point to a DataLayout header which is
1417 // consistent with the bcp. The converse is highly probable also.
1418 load_unsigned_short(arg2_reg,
1419 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1420 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1421 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1422 cmpptr(arg2_reg, _bcp_register);
1423 jcc(Assembler::equal, verify_continue);
1424 // rbx: method
1425 // _bcp_register: bcp
1426 // c_rarg3: mdp
1427 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1428 rbx, _bcp_register, arg3_reg);
1429 bind(verify_continue);
1430 pop(arg2_reg);
1431 pop(arg3_reg);
1432 pop(rbx);
1433 pop(rax);
1434 #endif // ASSERT
1435 }
1436
1437
1438 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1439 int constant,
1440 Register value) {
1441 assert(ProfileInterpreter, "must be profiling interpreter");
1442 Address data(mdp_in, constant);
1443 movptr(data, value);
1444 }
1445
1446
1447 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1448 int constant,
1449 bool decrement) {
1450 // Counter address
1451 Address data(mdp_in, constant);
1452
1453 increment_mdp_data_at(data, decrement);
1454 }
1455
1456 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1457 bool decrement) {
1458 assert(ProfileInterpreter, "must be profiling interpreter");
1459 // %%% this does 64bit counters at best it is wasting space
1460 // at worst it is a rare bug when counters overflow
1461
1462 if (decrement) {
1463 // Decrement the register. Set condition codes.
1464 addptr(data, (int32_t) -DataLayout::counter_increment);
1465 // If the decrement causes the counter to overflow, stay negative
1466 Label L;
1467 jcc(Assembler::negative, L);
1468 addptr(data, (int32_t) DataLayout::counter_increment);
1469 bind(L);
1470 } else {
1471 assert(DataLayout::counter_increment == 1,
1472 "flow-free idiom only works with 1");
1473 // Increment the register. Set carry flag.
1474 addptr(data, DataLayout::counter_increment);
1475 // If the increment causes the counter to overflow, pull back by 1.
1476 sbbptr(data, (int32_t)0);
1477 }
1478 }
1479
1480
1481 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1482 Register reg,
1483 int constant,
1484 bool decrement) {
1485 Address data(mdp_in, reg, Address::times_1, constant);
1486
1487 increment_mdp_data_at(data, decrement);
1488 }
1489
1490 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1491 int flag_byte_constant) {
1492 assert(ProfileInterpreter, "must be profiling interpreter");
1493 int header_offset = in_bytes(DataLayout::header_offset());
1494 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1495 // Set the flag
1496 orl(Address(mdp_in, header_offset), header_bits);
1497 }
1498
1499
1500
1501 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1502 int offset,
1503 Register value,
1504 Register test_value_out,
1505 Label& not_equal_continue) {
1506 assert(ProfileInterpreter, "must be profiling interpreter");
1507 if (test_value_out == noreg) {
1508 cmpptr(value, Address(mdp_in, offset));
1509 } else {
1510 // Put the test value into a register, so caller can use it:
1511 movptr(test_value_out, Address(mdp_in, offset));
1512 cmpptr(test_value_out, value);
1513 }
1514 jcc(Assembler::notEqual, not_equal_continue);
1515 }
1516
1517
1518 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1519 int offset_of_disp) {
1520 assert(ProfileInterpreter, "must be profiling interpreter");
1521 Address disp_address(mdp_in, offset_of_disp);
1522 addptr(mdp_in, disp_address);
1523 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1524 }
1525
1526
1527 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1528 Register reg,
1529 int offset_of_disp) {
1530 assert(ProfileInterpreter, "must be profiling interpreter");
1531 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1532 addptr(mdp_in, disp_address);
1533 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1534 }
1535
1536
1537 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1538 int constant) {
1539 assert(ProfileInterpreter, "must be profiling interpreter");
1540 addptr(mdp_in, constant);
1541 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1542 }
1543
1544
1545 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1546 assert(ProfileInterpreter, "must be profiling interpreter");
1547 push(return_bci); // save/restore across call_VM
1548 call_VM(noreg,
1549 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1550 return_bci);
1551 pop(return_bci);
1552 }
1553
1554
1555 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1556 Register bumped_count) {
1557 if (ProfileInterpreter) {
1558 Label profile_continue;
1559
1560 // If no method data exists, go to profile_continue.
1561 // Otherwise, assign to mdp
1562 test_method_data_pointer(mdp, profile_continue);
1563
1564 // We are taking a branch. Increment the taken count.
1565 // We inline increment_mdp_data_at to return bumped_count in a register
1566 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1567 Address data(mdp, in_bytes(JumpData::taken_offset()));
1568 movptr(bumped_count, data);
1569 assert(DataLayout::counter_increment == 1,
1570 "flow-free idiom only works with 1");
1571 addptr(bumped_count, DataLayout::counter_increment);
1572 sbbptr(bumped_count, 0);
1573 movptr(data, bumped_count); // Store back out
1574
1575 // The method data pointer needs to be updated to reflect the new target.
1576 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1577 bind(profile_continue);
1578 }
1579 }
1580
1581
1582 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1583 if (ProfileInterpreter) {
1584 Label profile_continue;
1585
1586 // If no method data exists, go to profile_continue.
1587 test_method_data_pointer(mdp, profile_continue);
1588
1589 // We are taking a branch. Increment the not taken count.
1590 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1591
1592 // The method data pointer needs to be updated to correspond to
1593 // the next bytecode
1594 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1595 bind(profile_continue);
1596 }
1597 }
1598
1599 void InterpreterMacroAssembler::profile_call(Register mdp) {
1600 if (ProfileInterpreter) {
1601 Label profile_continue;
1602
1603 // If no method data exists, go to profile_continue.
1604 test_method_data_pointer(mdp, profile_continue);
1605
1606 // We are making a call. Increment the count.
1607 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1608
1609 // The method data pointer needs to be updated to reflect the new target.
1610 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1611 bind(profile_continue);
1612 }
1613 }
1614
1615
1616 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
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 // We are making a call. Increment the count.
1624 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1625
1626 // The method data pointer needs to be updated to reflect the new target.
1627 update_mdp_by_constant(mdp,
1628 in_bytes(VirtualCallData::
1629 virtual_call_data_size()));
1630 bind(profile_continue);
1631 }
1632 }
1633
1634
1635 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1636 Register mdp,
1637 Register reg2,
1638 bool receiver_can_be_null) {
1639 if (ProfileInterpreter) {
1640 Label profile_continue;
1641
1642 // If no method data exists, go to profile_continue.
1643 test_method_data_pointer(mdp, profile_continue);
1644
1645 Label skip_receiver_profile;
1646 if (receiver_can_be_null) {
1647 Label not_null;
1648 testptr(receiver, receiver);
1649 jccb(Assembler::notZero, not_null);
1650 // We are making a call. Increment the count for null receiver.
1651 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1652 jmp(skip_receiver_profile);
1653 bind(not_null);
1654 }
1655
1656 // Record the receiver type.
1657 record_klass_in_profile(receiver, mdp, reg2, true);
1658 bind(skip_receiver_profile);
1659
1660 // The method data pointer needs to be updated to reflect the new target.
1661 #if INCLUDE_JVMCI
1662 if (MethodProfileWidth == 0) {
1663 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1664 }
1665 #else // INCLUDE_JVMCI
1666 update_mdp_by_constant(mdp,
1667 in_bytes(VirtualCallData::
1668 virtual_call_data_size()));
1669 #endif // INCLUDE_JVMCI
1670 bind(profile_continue);
1671 }
1672 }
1673
1674 #if INCLUDE_JVMCI
1675 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1676 assert_different_registers(method, mdp, reg2);
1677 if (ProfileInterpreter && MethodProfileWidth > 0) {
1678 Label profile_continue;
1679
1680 // If no method data exists, go to profile_continue.
1681 test_method_data_pointer(mdp, profile_continue);
1682
1683 Label done;
1684 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1685 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1686 bind(done);
1687
1688 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1689 bind(profile_continue);
1690 }
1691 }
1692 #endif // INCLUDE_JVMCI
1693
1694 // This routine creates a state machine for updating the multi-row
1695 // type profile at a virtual call site (or other type-sensitive bytecode).
1696 // The machine visits each row (of receiver/count) until the receiver type
1697 // is found, or until it runs out of rows. At the same time, it remembers
1698 // the location of the first empty row. (An empty row records null for its
1699 // receiver, and can be allocated for a newly-observed receiver type.)
1700 // Because there are two degrees of freedom in the state, a simple linear
1701 // search will not work; it must be a decision tree. Hence this helper
1702 // function is recursive, to generate the required tree structured code.
1703 // It's the interpreter, so we are trading off code space for speed.
1704 // See below for example code.
1705 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1706 Register receiver, Register mdp,
1707 Register reg2, int start_row,
1708 Label& done, bool is_virtual_call) {
1709 if (TypeProfileWidth == 0) {
1710 if (is_virtual_call) {
1711 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1712 }
1713 #if INCLUDE_JVMCI
1714 else if (EnableJVMCI) {
1715 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1716 }
1717 #endif // INCLUDE_JVMCI
1718 } else {
1719 int non_profiled_offset = -1;
1720 if (is_virtual_call) {
1721 non_profiled_offset = in_bytes(CounterData::count_offset());
1722 }
1723 #if INCLUDE_JVMCI
1724 else if (EnableJVMCI) {
1725 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1726 }
1727 #endif // INCLUDE_JVMCI
1728
1729 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1730 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1731 }
1732 }
1733
1734 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1735 Register reg2, int start_row, Label& done, int total_rows,
1736 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1737 int non_profiled_offset) {
1738 int last_row = total_rows - 1;
1739 assert(start_row <= last_row, "must be work left to do");
1740 // Test this row for both the item and for null.
1741 // Take any of three different outcomes:
1742 // 1. found item => increment count and goto done
1743 // 2. found null => keep looking for case 1, maybe allocate this cell
1744 // 3. found something else => keep looking for cases 1 and 2
1745 // Case 3 is handled by a recursive call.
1746 for (int row = start_row; row <= last_row; row++) {
1747 Label next_test;
1748 bool test_for_null_also = (row == start_row);
1749
1750 // See if the item is item[n].
1751 int item_offset = in_bytes(item_offset_fn(row));
1752 test_mdp_data_at(mdp, item_offset, item,
1753 (test_for_null_also ? reg2 : noreg),
1754 next_test);
1755 // (Reg2 now contains the item from the CallData.)
1756
1757 // The item is item[n]. Increment count[n].
1758 int count_offset = in_bytes(item_count_offset_fn(row));
1759 increment_mdp_data_at(mdp, count_offset);
1760 jmp(done);
1761 bind(next_test);
1762
1763 if (test_for_null_also) {
1764 Label found_null;
1765 // Failed the equality check on item[n]... Test for null.
1766 testptr(reg2, reg2);
1767 if (start_row == last_row) {
1768 // The only thing left to do is handle the null case.
1769 if (non_profiled_offset >= 0) {
1770 jccb(Assembler::zero, found_null);
1771 // Item did not match any saved item and there is no empty row for it.
1772 // Increment total counter to indicate polymorphic case.
1773 increment_mdp_data_at(mdp, non_profiled_offset);
1774 jmp(done);
1775 bind(found_null);
1776 } else {
1777 jcc(Assembler::notZero, done);
1778 }
1779 break;
1780 }
1781 // Since null is rare, make it be the branch-taken case.
1782 jcc(Assembler::zero, found_null);
1783
1784 // Put all the "Case 3" tests here.
1785 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1786 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1787
1788 // Found a null. Keep searching for a matching item,
1789 // but remember that this is an empty (unused) slot.
1790 bind(found_null);
1791 }
1792 }
1793
1794 // In the fall-through case, we found no matching item, but we
1795 // observed the item[start_row] is NULL.
1796
1797 // Fill in the item field and increment the count.
1798 int item_offset = in_bytes(item_offset_fn(start_row));
1799 set_mdp_data_at(mdp, item_offset, item);
1800 int count_offset = in_bytes(item_count_offset_fn(start_row));
1801 movl(reg2, DataLayout::counter_increment);
1802 set_mdp_data_at(mdp, count_offset, reg2);
1803 if (start_row > 0) {
1804 jmp(done);
1805 }
1806 }
1807
1808 // Example state machine code for three profile rows:
1809 // // main copy of decision tree, rooted at row[1]
1810 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1811 // if (row[0].rec != NULL) {
1812 // // inner copy of decision tree, rooted at row[1]
1813 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1814 // if (row[1].rec != NULL) {
1815 // // degenerate decision tree, rooted at row[2]
1816 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1817 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1818 // row[2].init(rec); goto done;
1819 // } else {
1820 // // remember row[1] is empty
1821 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1822 // row[1].init(rec); goto done;
1823 // }
1824 // } else {
1825 // // remember row[0] is empty
1826 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1827 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1828 // row[0].init(rec); goto done;
1829 // }
1830 // done:
1831
1832 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1833 Register mdp, Register reg2,
1834 bool is_virtual_call) {
1835 assert(ProfileInterpreter, "must be profiling");
1836 Label done;
1837
1838 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1839
1840 bind (done);
1841 }
1842
1843 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1844 Register mdp) {
1845 if (ProfileInterpreter) {
1846 Label profile_continue;
1847 uint row;
1848
1849 // If no method data exists, go to profile_continue.
1850 test_method_data_pointer(mdp, profile_continue);
1851
1852 // Update the total ret count.
1853 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1854
1855 for (row = 0; row < RetData::row_limit(); row++) {
1856 Label next_test;
1857
1858 // See if return_bci is equal to bci[n]:
1859 test_mdp_data_at(mdp,
1860 in_bytes(RetData::bci_offset(row)),
1861 return_bci, noreg,
1862 next_test);
1863
1864 // return_bci is equal to bci[n]. Increment the count.
1865 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1866
1867 // The method data pointer needs to be updated to reflect the new target.
1868 update_mdp_by_offset(mdp,
1869 in_bytes(RetData::bci_displacement_offset(row)));
1870 jmp(profile_continue);
1871 bind(next_test);
1872 }
1873
1874 update_mdp_for_ret(return_bci);
1875
1876 bind(profile_continue);
1877 }
1878 }
1879
1880
1881 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1882 if (ProfileInterpreter) {
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 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1889
1890 // The method data pointer needs to be updated.
1891 int mdp_delta = in_bytes(BitData::bit_data_size());
1892 if (TypeProfileCasts) {
1893 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1894 }
1895 update_mdp_by_constant(mdp, mdp_delta);
1896
1897 bind(profile_continue);
1898 }
1899 }
1900
1901
1902 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1903 if (ProfileInterpreter && TypeProfileCasts) {
1904 Label profile_continue;
1905
1906 // If no method data exists, go to profile_continue.
1907 test_method_data_pointer(mdp, profile_continue);
1908
1909 int count_offset = in_bytes(CounterData::count_offset());
1910 // Back up the address, since we have already bumped the mdp.
1911 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1912
1913 // *Decrement* the counter. We expect to see zero or small negatives.
1914 increment_mdp_data_at(mdp, count_offset, true);
1915
1916 bind (profile_continue);
1917 }
1918 }
1919
1920
1921 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1922 if (ProfileInterpreter) {
1923 Label profile_continue;
1924
1925 // If no method data exists, go to profile_continue.
1926 test_method_data_pointer(mdp, profile_continue);
1927
1928 // The method data pointer needs to be updated.
1929 int mdp_delta = in_bytes(BitData::bit_data_size());
1930 if (TypeProfileCasts) {
1931 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1932
1933 // Record the object type.
1934 record_klass_in_profile(klass, mdp, reg2, false);
1935 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1936 NOT_LP64(restore_locals();) // Restore EDI
1937 }
1938 update_mdp_by_constant(mdp, mdp_delta);
1939
1940 bind(profile_continue);
1941 }
1942 }
1943
1944
1945 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1946 if (ProfileInterpreter) {
1947 Label profile_continue;
1948
1949 // If no method data exists, go to profile_continue.
1950 test_method_data_pointer(mdp, profile_continue);
1951
1952 // Update the default case count
1953 increment_mdp_data_at(mdp,
1954 in_bytes(MultiBranchData::default_count_offset()));
1955
1956 // The method data pointer needs to be updated.
1957 update_mdp_by_offset(mdp,
1958 in_bytes(MultiBranchData::
1959 default_displacement_offset()));
1960
1961 bind(profile_continue);
1962 }
1963 }
1964
1965
1966 void InterpreterMacroAssembler::profile_switch_case(Register index,
1967 Register mdp,
1968 Register reg2) {
1969 if (ProfileInterpreter) {
1970 Label profile_continue;
1971
1972 // If no method data exists, go to profile_continue.
1973 test_method_data_pointer(mdp, profile_continue);
1974
1975 // Build the base (index * per_case_size_in_bytes()) +
1976 // case_array_offset_in_bytes()
1977 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1978 imulptr(index, reg2); // XXX l ?
1979 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1980
1981 // Update the case count
1982 increment_mdp_data_at(mdp,
1983 index,
1984 in_bytes(MultiBranchData::relative_count_offset()));
1985
1986 // The method data pointer needs to be updated.
1987 update_mdp_by_offset(mdp,
1988 index,
1989 in_bytes(MultiBranchData::
1990 relative_displacement_offset()));
1991
1992 bind(profile_continue);
1993 }
1994 }
1995
1996
1997
1998 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1999 if (state == atos) {
2000 MacroAssembler::verify_oop(reg);
2001 }
2002 }
2003
2004 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
2005 #ifndef _LP64
2006 if ((state == ftos && UseSSE < 1) ||
2007 (state == dtos && UseSSE < 2)) {
2008 MacroAssembler::verify_FPU(stack_depth);
2009 }
2010 #endif
2011 }
2012
2013 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
2014 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
2015 int increment, Address mask,
2016 Register scratch, bool preloaded,
2017 Condition cond, Label* where) {
2018 if (!preloaded) {
2019 movl(scratch, counter_addr);
2020 }
2021 incrementl(scratch, increment);
2022 movl(counter_addr, scratch);
2023 andl(scratch, mask);
2024 jcc(cond, *where);
2025 }
2026
2027 void InterpreterMacroAssembler::notify_method_entry() {
2028 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2029 // track stack depth. If it is possible to enter interp_only_mode we add
2030 // the code to check if the event should be sent.
2031 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2032 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2033 if (JvmtiExport::can_post_interpreter_events()) {
2034 Label L;
2035 NOT_LP64(get_thread(rthread);)
2036 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2037 testl(rdx, rdx);
2038 jcc(Assembler::zero, L);
2039 call_VM(noreg, CAST_FROM_FN_PTR(address,
2040 InterpreterRuntime::post_method_entry));
2041 bind(L);
2042 }
2043
2044 {
2045 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2046 NOT_LP64(get_thread(rthread);)
2047 get_method(rarg);
2048 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2049 rthread, rarg);
2050 }
2051
2052 // RedefineClasses() tracing support for obsolete method entry
2053 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2054 NOT_LP64(get_thread(rthread);)
2055 get_method(rarg);
2056 call_VM_leaf(
2057 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2058 rthread, rarg);
2059 }
2060 }
2061
2062
2063 void InterpreterMacroAssembler::notify_method_exit(
2064 TosState state, NotifyMethodExitMode mode) {
2065 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2066 // track stack depth. If it is possible to enter interp_only_mode we add
2067 // the code to check if the event should be sent.
2068 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2069 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2070 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2071 Label L;
2072 // Note: frame::interpreter_frame_result has a dependency on how the
2073 // method result is saved across the call to post_method_exit. If this
2074 // is changed then the interpreter_frame_result implementation will
2075 // need to be updated too.
2076
2077 // template interpreter will leave the result on the top of the stack.
2078 push(state);
2079 NOT_LP64(get_thread(rthread);)
2080 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2081 testl(rdx, rdx);
2082 jcc(Assembler::zero, L);
2083 call_VM(noreg,
2084 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2085 bind(L);
2086 pop(state);
2087 }
2088
2089 {
2090 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2091 push(state);
2092 NOT_LP64(get_thread(rthread);)
2093 get_method(rarg);
2094 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2095 rthread, rarg);
2096 pop(state);
2097 }
2098 }