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