1 /*
2 * Copyright (c) 1997, 2023, 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 "compiler/compiler_globals.hpp"
27 #include "interp_masm_x86.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterRuntime.hpp"
30 #include "logging/log.hpp"
31 #include "oops/arrayOop.hpp"
32 #include "oops/markWord.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/method.hpp"
35 #include "prims/jvmtiExport.hpp"
36 #include "prims/jvmtiThreadState.hpp"
37 #include "runtime/basicLock.hpp"
38 #include "runtime/frame.inline.hpp"
39 #include "runtime/javaThread.hpp"
40 #include "runtime/safepointMechanism.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "utilities/powerOfTwo.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 interp_verify_oop(obj, atos);
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, rscratch1);
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, log2i_exact((int)DataLayout::cell_size));
155 addptr(mdp, tmp);
156 }
157 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
158 } else {
159 assert(MethodData::profile_return(), "either profile call args or call ret");
160 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
161 }
162
163 // mdp points right after the end of the
164 // CallTypeData/VirtualCallTypeData, right after the cells for the
165 // return value type if there's one
166
167 bind(profile_continue);
168 }
169 }
170
171 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
172 assert_different_registers(mdp, ret, tmp, _bcp_register);
173 if (ProfileInterpreter && MethodData::profile_return()) {
174 Label profile_continue;
175
176 test_method_data_pointer(mdp, profile_continue);
177
178 if (MethodData::profile_return_jsr292_only()) {
179 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
180
181 // If we don't profile all invoke bytecodes we must make sure
182 // it's a bytecode we indeed profile. We can't go back to the
183 // beginning 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()), static_cast<int>(vmIntrinsics::_compiledLambdaForm));
193 jcc(Assembler::notEqual, profile_continue);
194
195 bind(do_profile);
196 }
197
198 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
199 mov(tmp, ret);
200 profile_obj_type(tmp, mdo_ret_addr);
201
202 bind(profile_continue);
203 }
204 }
205
206 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
207 if (ProfileInterpreter && MethodData::profile_parameters()) {
208 Label profile_continue;
209
210 test_method_data_pointer(mdp, profile_continue);
211
212 // Load the offset of the area within the MDO used for
213 // parameters. If it's negative we're not profiling any parameters
214 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
215 testl(tmp1, tmp1);
216 jcc(Assembler::negative, profile_continue);
217
218 // Compute a pointer to the area for parameters from the offset
219 // and move the pointer to the slot for the last
220 // parameters. Collect profiling from last parameter down.
221 // mdo start + parameters offset + array length - 1
222 addptr(mdp, tmp1);
223 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
224 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
225
226 Label loop;
227 bind(loop);
228
229 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
230 int type_base = in_bytes(ParametersTypeData::type_offset(0));
231 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
232 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
233 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
234
235 // load offset on the stack from the slot for this parameter
236 movptr(tmp2, arg_off);
237 negptr(tmp2);
238 // read the parameter from the local area
239 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
240
241 // profile the parameter
242 profile_obj_type(tmp2, arg_type);
243
244 // go to next parameter
245 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
246 jcc(Assembler::positive, loop);
247
248 bind(profile_continue);
249 }
250 }
251
252 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
253 int number_of_arguments) {
254 // interpreter specific
255 //
256 // Note: No need to save/restore bcp & locals registers
257 // since these are callee saved registers and no blocking/
258 // GC can happen in leaf calls.
259 // Further Note: DO NOT save/restore bcp/locals. If a caller has
260 // already saved them so that it can use rsi/rdi as temporaries
261 // then a save/restore here will DESTROY the copy the caller
262 // saved! There used to be a save_bcp() that only happened in
263 // the ASSERT path (no restore_bcp). Which caused bizarre failures
264 // when jvm built with ASSERTs.
265 #ifdef ASSERT
266 {
267 Label L;
268 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), 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), NULL_WORD);
301 jcc(Assembler::equal, L);
302 stop("InterpreterMacroAssembler::call_VM_base:"
303 " last_sp != NULL");
304 bind(L);
305 }
306 #endif /* ASSERT */
307 // super call
308 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
309 entry_point, number_of_arguments,
310 check_exceptions);
311 // interpreter specific
312 restore_bcp();
313 restore_locals();
314 }
315
316 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
317 if (JvmtiExport::can_pop_frame()) {
318 Label L;
319 // Initiate popframe handling only if it is not already being
320 // processed. If the flag has the popframe_processing bit set, it
321 // means that this code is called *during* popframe handling - we
322 // don't want to reenter.
323 // This method is only called just after the call into the vm in
324 // call_VM_base, so the arg registers are available.
325 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
326 LP64_ONLY(c_rarg0);
327 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
328 testl(pop_cond, JavaThread::popframe_pending_bit);
329 jcc(Assembler::zero, L);
330 testl(pop_cond, JavaThread::popframe_processing_bit);
331 jcc(Assembler::notZero, L);
332 // Call Interpreter::remove_activation_preserving_args_entry() to get the
333 // address of the same-named entrypoint in the generated interpreter code.
334 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
335 jmp(rax);
336 bind(L);
337 NOT_LP64(get_thread(java_thread);)
338 }
339 }
340
341 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
342 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
343 NOT_LP64(get_thread(thread);)
344 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
345 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
346 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
347 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
348 #ifdef _LP64
349 switch (state) {
350 case atos: movptr(rax, oop_addr);
351 movptr(oop_addr, NULL_WORD);
352 interp_verify_oop(rax, state); break;
353 case ltos: movptr(rax, val_addr); break;
354 case btos: // fall through
355 case ztos: // fall through
356 case ctos: // fall through
357 case stos: // fall through
358 case itos: movl(rax, val_addr); break;
359 case ftos: load_float(val_addr); break;
360 case dtos: load_double(val_addr); break;
361 case vtos: /* nothing to do */ break;
362 default : ShouldNotReachHere();
363 }
364 // Clean up tos value in the thread object
365 movl(tos_addr, ilgl);
366 movl(val_addr, NULL_WORD);
367 #else
368 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
369 + in_ByteSize(wordSize));
370 switch (state) {
371 case atos: movptr(rax, oop_addr);
372 movptr(oop_addr, NULL_WORD);
373 interp_verify_oop(rax, state); break;
374 case ltos:
375 movl(rdx, val_addr1); // fall through
376 case btos: // fall through
377 case ztos: // fall through
378 case ctos: // fall through
379 case stos: // fall through
380 case itos: movl(rax, val_addr); break;
381 case ftos: load_float(val_addr); break;
382 case dtos: load_double(val_addr); break;
383 case vtos: /* nothing to do */ break;
384 default : ShouldNotReachHere();
385 }
386 #endif // _LP64
387 // Clean up tos value in the thread object
388 movl(tos_addr, ilgl);
389 movptr(val_addr, NULL_WORD);
390 NOT_LP64(movptr(val_addr1, NULL_WORD);)
391 }
392
393
394 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
395 if (JvmtiExport::can_force_early_return()) {
396 Label L;
397 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
398 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
399
400 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
401 testptr(tmp, tmp);
402 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
403
404 // Initiate earlyret handling only if it is not already being processed.
405 // If the flag has the earlyret_processing bit set, it means that this code
406 // is called *during* earlyret handling - we don't want to reenter.
407 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
408 cmpl(tmp, JvmtiThreadState::earlyret_pending);
409 jcc(Assembler::notEqual, L);
410
411 // Call Interpreter::remove_activation_early_entry() to get the address of the
412 // same-named entrypoint in the generated interpreter code.
413 NOT_LP64(get_thread(java_thread);)
414 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
415 #ifdef _LP64
416 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
417 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
418 #else
419 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
420 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
421 #endif // _LP64
422 jmp(rax);
423 bind(L);
424 NOT_LP64(get_thread(java_thread);)
425 }
426 }
427
428 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
429 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
430 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
431 bswapl(reg);
432 shrl(reg, 16);
433 }
434
435 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
436 int bcp_offset,
437 size_t index_size) {
438 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
439 if (index_size == sizeof(u2)) {
440 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
441 } else if (index_size == sizeof(u4)) {
442 movl(index, Address(_bcp_register, bcp_offset));
443 // Check if the secondary index definition is still ~x, otherwise
444 // we have to change the following assembler code to calculate the
445 // plain index.
446 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
447 notl(index); // convert to plain index
448 } else if (index_size == sizeof(u1)) {
449 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
450 } else {
451 ShouldNotReachHere();
452 }
453 }
454
455 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
456 Register index,
457 int bcp_offset,
458 size_t index_size) {
459 assert_different_registers(cache, index);
460 get_cache_index_at_bcp(index, bcp_offset, index_size);
461 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
462 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
463 // convert from field index to ConstantPoolCacheEntry index
464 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
465 shll(index, 2);
466 }
467
468 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
469 Register index,
470 Register bytecode,
471 int byte_no,
472 int bcp_offset,
473 size_t index_size) {
474 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
475 // We use a 32-bit load here since the layout of 64-bit words on
476 // little-endian machines allow us that.
477 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
478 const int shift_count = (1 + byte_no) * BitsPerByte;
479 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
480 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
481 "correct shift count");
482 shrl(bytecode, shift_count);
483 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
484 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
485 }
486
487 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
488 Register tmp,
489 int bcp_offset,
490 size_t index_size) {
491 assert_different_registers(cache, tmp);
492
493 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
494 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
495 // convert from field index to ConstantPoolCacheEntry index
496 // and from word offset to byte offset
497 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
498 shll(tmp, 2 + LogBytesPerWord);
499 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
500 // skip past the header
501 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
502 addptr(cache, tmp); // construct pointer to cache entry
503 }
504
505 // Load object from cpool->resolved_references(index)
506 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result,
507 Register index,
508 Register tmp) {
509 assert_different_registers(result, index);
510
511 get_constant_pool(result);
512 // load pointer for resolved_references[] objArray
513 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
514 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
515 resolve_oop_handle(result, tmp);
516 load_heap_oop(result, Address(result, index,
517 UseCompressedOops ? Address::times_4 : Address::times_ptr,
518 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
519 }
520
521 // load cpool->resolved_klass_at(index)
522 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass,
523 Register cpool,
524 Register index) {
525 assert_different_registers(cpool, index);
526
527 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
528 Register resolved_klasses = cpool;
529 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
530 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
531 }
532
533 void InterpreterMacroAssembler::load_resolved_method_at_index(int byte_no,
534 Register method,
535 Register cache,
536 Register index) {
537 assert_different_registers(cache, index);
538
539 const int method_offset = in_bytes(
540 ConstantPoolCache::base_offset() +
541 ((byte_no == TemplateTable::f2_byte)
542 ? ConstantPoolCacheEntry::f2_offset()
543 : ConstantPoolCacheEntry::f1_offset()));
544
545 movptr(method, Address(cache, index, Address::times_ptr, method_offset)); // get f1 Method*
546 }
547
548 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
549 // subtype of super_klass.
550 //
551 // Args:
552 // rax: superklass
553 // Rsub_klass: subklass
554 //
555 // Kills:
556 // rcx, rdi
557 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
558 Label& ok_is_subtype) {
559 assert(Rsub_klass != rax, "rax holds superklass");
560 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
561 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
562 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
563 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
564
565 // Profile the not-null value's klass.
566 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
567
568 // Do the check.
569 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
570
571 // Profile the failure of the check.
572 profile_typecheck_failed(rcx); // blows rcx
573 }
574
575
576 #ifndef _LP64
577 void InterpreterMacroAssembler::f2ieee() {
578 if (IEEEPrecision) {
579 fstp_s(Address(rsp, 0));
580 fld_s(Address(rsp, 0));
581 }
582 }
583
584
585 void InterpreterMacroAssembler::d2ieee() {
586 if (IEEEPrecision) {
587 fstp_d(Address(rsp, 0));
588 fld_d(Address(rsp, 0));
589 }
590 }
591 #endif // _LP64
592
593 // Java Expression Stack
594
595 void InterpreterMacroAssembler::pop_ptr(Register r) {
596 pop(r);
597 }
598
599 void InterpreterMacroAssembler::push_ptr(Register r) {
600 push(r);
601 }
602
603 void InterpreterMacroAssembler::push_i(Register r) {
604 push(r);
605 }
606
607 void InterpreterMacroAssembler::push_i_or_ptr(Register r) {
608 push(r);
609 }
610
611 void InterpreterMacroAssembler::push_f(XMMRegister r) {
612 subptr(rsp, wordSize);
613 movflt(Address(rsp, 0), r);
614 }
615
616 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
617 movflt(r, Address(rsp, 0));
618 addptr(rsp, wordSize);
619 }
620
621 void InterpreterMacroAssembler::push_d(XMMRegister r) {
622 subptr(rsp, 2 * wordSize);
623 movdbl(Address(rsp, 0), r);
624 }
625
626 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
627 movdbl(r, Address(rsp, 0));
628 addptr(rsp, 2 * Interpreter::stackElementSize);
629 }
630
631 #ifdef _LP64
632 void InterpreterMacroAssembler::pop_i(Register r) {
633 // XXX can't use pop currently, upper half non clean
634 movl(r, Address(rsp, 0));
635 addptr(rsp, wordSize);
636 }
637
638 void InterpreterMacroAssembler::pop_l(Register r) {
639 movq(r, Address(rsp, 0));
640 addptr(rsp, 2 * Interpreter::stackElementSize);
641 }
642
643 void InterpreterMacroAssembler::push_l(Register r) {
644 subptr(rsp, 2 * wordSize);
645 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
646 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
647 }
648
649 void InterpreterMacroAssembler::pop(TosState state) {
650 switch (state) {
651 case atos: pop_ptr(); break;
652 case btos:
653 case ztos:
654 case ctos:
655 case stos:
656 case itos: pop_i(); break;
657 case ltos: pop_l(); break;
658 case ftos: pop_f(xmm0); break;
659 case dtos: pop_d(xmm0); break;
660 case vtos: /* nothing to do */ break;
661 default: ShouldNotReachHere();
662 }
663 interp_verify_oop(rax, state);
664 }
665
666 void InterpreterMacroAssembler::push(TosState state) {
667 interp_verify_oop(rax, state);
668 switch (state) {
669 case atos: push_ptr(); break;
670 case btos:
671 case ztos:
672 case ctos:
673 case stos:
674 case itos: push_i(); break;
675 case ltos: push_l(); break;
676 case ftos: push_f(xmm0); break;
677 case dtos: push_d(xmm0); break;
678 case vtos: /* nothing to do */ break;
679 default : ShouldNotReachHere();
680 }
681 }
682 #else
683 void InterpreterMacroAssembler::pop_i(Register r) {
684 pop(r);
685 }
686
687 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
688 pop(lo);
689 pop(hi);
690 }
691
692 void InterpreterMacroAssembler::pop_f() {
693 fld_s(Address(rsp, 0));
694 addptr(rsp, 1 * wordSize);
695 }
696
697 void InterpreterMacroAssembler::pop_d() {
698 fld_d(Address(rsp, 0));
699 addptr(rsp, 2 * wordSize);
700 }
701
702
703 void InterpreterMacroAssembler::pop(TosState state) {
704 switch (state) {
705 case atos: pop_ptr(rax); break;
706 case btos: // fall through
707 case ztos: // fall through
708 case ctos: // fall through
709 case stos: // fall through
710 case itos: pop_i(rax); break;
711 case ltos: pop_l(rax, rdx); break;
712 case ftos:
713 if (UseSSE >= 1) {
714 pop_f(xmm0);
715 } else {
716 pop_f();
717 }
718 break;
719 case dtos:
720 if (UseSSE >= 2) {
721 pop_d(xmm0);
722 } else {
723 pop_d();
724 }
725 break;
726 case vtos: /* nothing to do */ break;
727 default : ShouldNotReachHere();
728 }
729 interp_verify_oop(rax, state);
730 }
731
732
733 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
734 push(hi);
735 push(lo);
736 }
737
738 void InterpreterMacroAssembler::push_f() {
739 // Do not schedule for no AGI! Never write beyond rsp!
740 subptr(rsp, 1 * wordSize);
741 fstp_s(Address(rsp, 0));
742 }
743
744 void InterpreterMacroAssembler::push_d() {
745 // Do not schedule for no AGI! Never write beyond rsp!
746 subptr(rsp, 2 * wordSize);
747 fstp_d(Address(rsp, 0));
748 }
749
750
751 void InterpreterMacroAssembler::push(TosState state) {
752 interp_verify_oop(rax, state);
753 switch (state) {
754 case atos: push_ptr(rax); break;
755 case btos: // fall through
756 case ztos: // fall through
757 case ctos: // fall through
758 case stos: // fall through
759 case itos: push_i(rax); break;
760 case ltos: push_l(rax, rdx); break;
761 case ftos:
762 if (UseSSE >= 1) {
763 push_f(xmm0);
764 } else {
765 push_f();
766 }
767 break;
768 case dtos:
769 if (UseSSE >= 2) {
770 push_d(xmm0);
771 } else {
772 push_d();
773 }
774 break;
775 case vtos: /* nothing to do */ break;
776 default : ShouldNotReachHere();
777 }
778 }
779 #endif // _LP64
780
781
782 // Helpers for swap and dup
783 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
784 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
785 }
786
787 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
788 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
789 }
790
791
792 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
793 // set sender sp
794 lea(_bcp_register, Address(rsp, wordSize));
795 // record last_sp
796 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
797 }
798
799
800 // Jump to from_interpreted entry of a call unless single stepping is possible
801 // in this thread in which case we must call the i2i entry
802 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
803 prepare_to_jump_from_interpreted();
804
805 if (JvmtiExport::can_post_interpreter_events()) {
806 Label run_compiled_code;
807 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
808 // compiled code in threads for which the event is enabled. Check here for
809 // interp_only_mode if these events CAN be enabled.
810 // interp_only is an int, on little endian it is sufficient to test the byte only
811 // Is a cmpl faster?
812 LP64_ONLY(temp = r15_thread;)
813 NOT_LP64(get_thread(temp);)
814 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
815 jccb(Assembler::zero, run_compiled_code);
816 jmp(Address(method, Method::interpreter_entry_offset()));
817 bind(run_compiled_code);
818 }
819
820 jmp(Address(method, Method::from_interpreted_offset()));
821 }
822
823 // The following two routines provide a hook so that an implementation
824 // can schedule the dispatch in two parts. x86 does not do this.
825 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
826 // Nothing x86 specific to be done here
827 }
828
829 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
830 dispatch_next(state, step);
831 }
832
833 void InterpreterMacroAssembler::dispatch_base(TosState state,
834 address* table,
835 bool verifyoop,
836 bool generate_poll) {
837 verify_FPU(1, state);
838 if (VerifyActivationFrameSize) {
839 Label L;
840 mov(rcx, rbp);
841 subptr(rcx, rsp);
842 int32_t min_frame_size =
843 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
844 wordSize;
845 cmpptr(rcx, min_frame_size);
846 jcc(Assembler::greaterEqual, L);
847 stop("broken stack frame");
848 bind(L);
849 }
850 if (verifyoop) {
851 interp_verify_oop(rax, state);
852 }
853
854 address* const safepoint_table = Interpreter::safept_table(state);
855 #ifdef _LP64
856 Label no_safepoint, dispatch;
857 if (table != safepoint_table && generate_poll) {
858 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
859 testb(Address(r15_thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
860
861 jccb(Assembler::zero, no_safepoint);
862 lea(rscratch1, ExternalAddress((address)safepoint_table));
863 jmpb(dispatch);
864 }
865
866 bind(no_safepoint);
867 lea(rscratch1, ExternalAddress((address)table));
868 bind(dispatch);
869 jmp(Address(rscratch1, rbx, Address::times_8));
870
871 #else
872 Address index(noreg, rbx, Address::times_ptr);
873 if (table != safepoint_table && generate_poll) {
874 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
875 Label no_safepoint;
876 const Register thread = rcx;
877 get_thread(thread);
878 testb(Address(thread, JavaThread::polling_word_offset()), SafepointMechanism::poll_bit());
879
880 jccb(Assembler::zero, no_safepoint);
881 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
882 jump(dispatch_addr, noreg);
883 bind(no_safepoint);
884 }
885
886 {
887 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
888 jump(dispatch_addr, noreg);
889 }
890 #endif // _LP64
891 }
892
893 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
894 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
895 }
896
897 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
898 dispatch_base(state, Interpreter::normal_table(state));
899 }
900
901 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
902 dispatch_base(state, Interpreter::normal_table(state), false);
903 }
904
905
906 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
907 // load next bytecode (load before advancing _bcp_register to prevent AGI)
908 load_unsigned_byte(rbx, Address(_bcp_register, step));
909 // advance _bcp_register
910 increment(_bcp_register, step);
911 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
912 }
913
914 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
915 // load current bytecode
916 load_unsigned_byte(rbx, Address(_bcp_register, 0));
917 dispatch_base(state, table);
918 }
919
920 void InterpreterMacroAssembler::narrow(Register result) {
921
922 // Get method->_constMethod->_result_type
923 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
924 movptr(rcx, Address(rcx, Method::const_offset()));
925 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
926
927 Label done, notBool, notByte, notChar;
928
929 // common case first
930 cmpl(rcx, T_INT);
931 jcc(Assembler::equal, done);
932
933 // mask integer result to narrower return type.
934 cmpl(rcx, T_BOOLEAN);
935 jcc(Assembler::notEqual, notBool);
936 andl(result, 0x1);
937 jmp(done);
938
939 bind(notBool);
940 cmpl(rcx, T_BYTE);
941 jcc(Assembler::notEqual, notByte);
942 LP64_ONLY(movsbl(result, result);)
943 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
944 NOT_LP64(sarl(result, 24);) // and sign-extend byte
945 jmp(done);
946
947 bind(notByte);
948 cmpl(rcx, T_CHAR);
949 jcc(Assembler::notEqual, notChar);
950 LP64_ONLY(movzwl(result, result);)
951 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
952 jmp(done);
953
954 bind(notChar);
955 // cmpl(rcx, T_SHORT); // all that's left
956 // jcc(Assembler::notEqual, done);
957 LP64_ONLY(movswl(result, result);)
958 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
959 NOT_LP64(sarl(result, 16);) // and sign-extend short
960
961 // Nothing to do for T_INT
962 bind(done);
963 }
964
965 // remove activation
966 //
967 // Apply stack watermark barrier.
968 // Unlock the receiver if this is a synchronized method.
969 // Unlock any Java monitors from synchronized blocks.
970 // Remove the activation from the stack.
971 //
972 // If there are locked Java monitors
973 // If throw_monitor_exception
974 // throws IllegalMonitorStateException
975 // Else if install_monitor_exception
976 // installs IllegalMonitorStateException
977 // Else
978 // no error processing
979 void InterpreterMacroAssembler::remove_activation(
980 TosState state,
981 Register ret_addr,
982 bool throw_monitor_exception,
983 bool install_monitor_exception,
984 bool notify_jvmdi) {
985 // Note: Registers rdx xmm0 may be in use for the
986 // result check if synchronized method
987 Label unlocked, unlock, no_unlock;
988
989 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
990 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
991 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
992 // monitor pointers need different register
993 // because rdx may have the result in it
994 NOT_LP64(get_thread(rthread);)
995
996 // The below poll is for the stack watermark barrier. It allows fixing up frames lazily,
997 // that would normally not be safe to use. Such bad returns into unsafe territory of
998 // the stack, will call InterpreterRuntime::at_unwind.
999 Label slow_path;
1000 Label fast_path;
1001 safepoint_poll(slow_path, rthread, true /* at_return */, false /* in_nmethod */);
1002 jmp(fast_path);
1003 bind(slow_path);
1004 push(state);
1005 set_last_Java_frame(rthread, noreg, rbp, (address)pc(), rscratch1);
1006 super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::at_unwind), rthread);
1007 NOT_LP64(get_thread(rthread);) // call_VM clobbered it, restore
1008 reset_last_Java_frame(rthread, true);
1009 pop(state);
1010 bind(fast_path);
1011
1012 // get the value of _do_not_unlock_if_synchronized into rdx
1013 const Address do_not_unlock_if_synchronized(rthread,
1014 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1015 movbool(rbx, do_not_unlock_if_synchronized);
1016 movbool(do_not_unlock_if_synchronized, false); // reset the flag
1017
1018 // get method access flags
1019 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
1020 movl(rcx, Address(rcx, Method::access_flags_offset()));
1021 testl(rcx, JVM_ACC_SYNCHRONIZED);
1022 jcc(Assembler::zero, unlocked);
1023
1024 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
1025 // is set.
1026 testbool(rbx);
1027 jcc(Assembler::notZero, no_unlock);
1028
1029 // unlock monitor
1030 push(state); // save result
1031
1032 // BasicObjectLock will be first in list, since this is a
1033 // synchronized method. However, need to check that the object has
1034 // not been unlocked by an explicit monitorexit bytecode.
1035 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
1036 wordSize - (int) sizeof(BasicObjectLock));
1037 // We use c_rarg1/rdx so that if we go slow path it will be the correct
1038 // register for unlock_object to pass to VM directly
1039 lea(robj, monitor); // address of first monitor
1040
1041 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1042 testptr(rax, rax);
1043 jcc(Assembler::notZero, unlock);
1044
1045 pop(state);
1046 if (throw_monitor_exception) {
1047 // Entry already unlocked, need to throw exception
1048 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1049 call_VM(noreg, CAST_FROM_FN_PTR(address,
1050 InterpreterRuntime::throw_illegal_monitor_state_exception));
1051 should_not_reach_here();
1052 } else {
1053 // Monitor already unlocked during a stack unroll. If requested,
1054 // install an illegal_monitor_state_exception. Continue with
1055 // stack unrolling.
1056 if (install_monitor_exception) {
1057 NOT_LP64(empty_FPU_stack();)
1058 call_VM(noreg, CAST_FROM_FN_PTR(address,
1059 InterpreterRuntime::new_illegal_monitor_state_exception));
1060 }
1061 jmp(unlocked);
1062 }
1063
1064 bind(unlock);
1065 unlock_object(robj);
1066 pop(state);
1067
1068 // Check that for block-structured locking (i.e., that all locked
1069 // objects has been unlocked)
1070 bind(unlocked);
1071
1072 // rax, rdx: Might contain return value
1073
1074 // Check that all monitors are unlocked
1075 {
1076 Label loop, exception, entry, restart;
1077 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1078 const Address monitor_block_top(
1079 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1080 const Address monitor_block_bot(
1081 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1082
1083 bind(restart);
1084 // We use c_rarg1 so that if we go slow path it will be the correct
1085 // register for unlock_object to pass to VM directly
1086 movptr(rmon, monitor_block_top); // points to current entry, starting
1087 // with top-most entry
1088 lea(rbx, monitor_block_bot); // points to word before bottom of
1089 // monitor block
1090 jmp(entry);
1091
1092 // Entry already locked, need to throw exception
1093 bind(exception);
1094
1095 if (throw_monitor_exception) {
1096 // Throw exception
1097 NOT_LP64(empty_FPU_stack();)
1098 MacroAssembler::call_VM(noreg,
1099 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1100 throw_illegal_monitor_state_exception));
1101 should_not_reach_here();
1102 } else {
1103 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1104 // Unlock does not block, so don't have to worry about the frame.
1105 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1106
1107 push(state);
1108 mov(robj, rmon); // nop if robj and rmon are the same
1109 unlock_object(robj);
1110 pop(state);
1111
1112 if (install_monitor_exception) {
1113 NOT_LP64(empty_FPU_stack();)
1114 call_VM(noreg, CAST_FROM_FN_PTR(address,
1115 InterpreterRuntime::
1116 new_illegal_monitor_state_exception));
1117 }
1118
1119 jmp(restart);
1120 }
1121
1122 bind(loop);
1123 // check if current entry is used
1124 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
1125 jcc(Assembler::notEqual, exception);
1126
1127 addptr(rmon, entry_size); // otherwise advance to next entry
1128 bind(entry);
1129 cmpptr(rmon, rbx); // check if bottom reached
1130 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1131 }
1132
1133 bind(no_unlock);
1134
1135 // jvmti support
1136 if (notify_jvmdi) {
1137 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1138 } else {
1139 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1140 }
1141
1142 // remove activation
1143 // get sender sp
1144 movptr(rbx,
1145 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1146 if (StackReservedPages > 0) {
1147 // testing if reserved zone needs to be re-enabled
1148 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1149 Label no_reserved_zone_enabling;
1150
1151 NOT_LP64(get_thread(rthread);)
1152
1153 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), StackOverflow::stack_guard_enabled);
1154 jcc(Assembler::equal, no_reserved_zone_enabling);
1155
1156 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1157 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1158
1159 call_VM_leaf(
1160 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1161 call_VM(noreg, CAST_FROM_FN_PTR(address,
1162 InterpreterRuntime::throw_delayed_StackOverflowError));
1163 should_not_reach_here();
1164
1165 bind(no_reserved_zone_enabling);
1166 }
1167 leave(); // remove frame anchor
1168 pop(ret_addr); // get return address
1169 mov(rsp, rbx); // set sp to sender sp
1170 pop_cont_fastpath();
1171 }
1172
1173 void InterpreterMacroAssembler::get_method_counters(Register method,
1174 Register mcs, Label& skip) {
1175 Label has_counters;
1176 movptr(mcs, Address(method, Method::method_counters_offset()));
1177 testptr(mcs, mcs);
1178 jcc(Assembler::notZero, has_counters);
1179 call_VM(noreg, CAST_FROM_FN_PTR(address,
1180 InterpreterRuntime::build_method_counters), method);
1181 movptr(mcs, Address(method,Method::method_counters_offset()));
1182 testptr(mcs, mcs);
1183 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1184 bind(has_counters);
1185 }
1186
1187
1188 // Lock object
1189 //
1190 // Args:
1191 // rdx, c_rarg1: BasicObjectLock to be used for locking
1192 //
1193 // Kills:
1194 // rax, rbx
1195 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1196 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1197 "The argument is only for looks. It must be c_rarg1");
1198
1199 if (UseHeavyMonitors) {
1200 call_VM(noreg,
1201 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1202 lock_reg);
1203 } else {
1204 Label count_locking, done, slow_case;
1205
1206 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1207 const Register tmp_reg = rbx;
1208 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1209 const Register rklass_decode_tmp = rscratch1;
1210
1211 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1212 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1213 const int mark_offset = lock_offset +
1214 BasicLock::displaced_header_offset_in_bytes();
1215
1216 // Load object pointer into obj_reg
1217 movptr(obj_reg, Address(lock_reg, obj_offset));
1218
1219 if (DiagnoseSyncOnValueBasedClasses != 0) {
1220 load_klass(tmp_reg, obj_reg, rklass_decode_tmp);
1221 movl(tmp_reg, Address(tmp_reg, Klass::access_flags_offset()));
1222 testl(tmp_reg, JVM_ACC_IS_VALUE_BASED_CLASS);
1223 jcc(Assembler::notZero, slow_case);
1224 }
1225
1226 if (UseFastLocking) {
1227 #ifdef _LP64
1228 const Register thread = r15_thread;
1229 #else
1230 const Register thread = lock_reg;
1231 get_thread(thread);
1232 #endif
1233 // Load object header, prepare for CAS from unlocked to locked.
1234 movptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1235 fast_lock_impl(obj_reg, swap_reg, thread, tmp_reg, slow_case);
1236 } else {
1237 // Load immediate 1 into swap_reg %rax
1238 movl(swap_reg, 1);
1239
1240 // Load (object->mark() | 1) into swap_reg %rax
1241 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1242
1243 // Save (object->mark() | 1) into BasicLock's displaced header
1244 movptr(Address(lock_reg, mark_offset), swap_reg);
1245
1246 assert(lock_offset == 0,
1247 "displaced header must be first word in BasicObjectLock");
1248
1249 lock();
1250 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1251 jcc(Assembler::zero, count_locking);
1252
1253 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1254
1255 // Fast check for recursive lock.
1256 //
1257 // Can apply the optimization only if this is a stack lock
1258 // allocated in this thread. For efficiency, we can focus on
1259 // recently allocated stack locks (instead of reading the stack
1260 // base and checking whether 'mark' points inside the current
1261 // thread stack):
1262 // 1) (mark & zero_bits) == 0, and
1263 // 2) rsp <= mark < mark + os::pagesize()
1264 //
1265 // Warning: rsp + os::pagesize can overflow the stack base. We must
1266 // neither apply the optimization for an inflated lock allocated
1267 // just above the thread stack (this is why condition 1 matters)
1268 // nor apply the optimization if the stack lock is inside the stack
1269 // of another thread. The latter is avoided even in case of overflow
1270 // because we have guard pages at the end of all stacks. Hence, if
1271 // we go over the stack base and hit the stack of another thread,
1272 // this should not be in a writeable area that could contain a
1273 // stack lock allocated by that thread. As a consequence, a stack
1274 // lock less than page size away from rsp is guaranteed to be
1275 // owned by the current thread.
1276 //
1277 // These 3 tests can be done by evaluating the following
1278 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1279 // assuming both stack pointer and pagesize have their
1280 // least significant bits clear.
1281 // NOTE: the mark is in swap_reg %rax as the result of cmpxchg
1282 subptr(swap_reg, rsp);
1283 andptr(swap_reg, zero_bits - (int)os::vm_page_size());
1284
1285 // Save the test result, for recursive case, the result is zero
1286 movptr(Address(lock_reg, mark_offset), swap_reg);
1287 jcc(Assembler::notZero, slow_case);
1288
1289 bind(count_locking);
1290 }
1291 inc_held_monitor_count();
1292 jmp(done);
1293
1294 bind(slow_case);
1295
1296 // Call the runtime routine for slow case
1297 call_VM(noreg,
1298 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1299 UseFastLocking ? obj_reg : lock_reg);
1300
1301 bind(done);
1302 }
1303 }
1304
1305
1306 // Unlocks an object. Used in monitorexit bytecode and
1307 // remove_activation. Throws an IllegalMonitorException if object is
1308 // not locked by current thread.
1309 //
1310 // Args:
1311 // rdx, c_rarg1: BasicObjectLock for lock
1312 //
1313 // Kills:
1314 // rax
1315 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1316 // rscratch1 (scratch reg)
1317 // rax, rbx, rcx, rdx
1318 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1319 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1320 "The argument is only for looks. It must be c_rarg1");
1321
1322 if (UseHeavyMonitors) {
1323 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1324 } else {
1325 Label count_locking, done, slow_case;
1326
1327 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1328 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1329 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1330
1331 save_bcp(); // Save in case of exception
1332
1333 if (!UseFastLocking) {
1334 // Convert from BasicObjectLock structure to object and BasicLock
1335 // structure Store the BasicLock address into %rax
1336 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1337 }
1338
1339 // Load oop into obj_reg(%c_rarg3)
1340 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1341
1342 // Free entry
1343 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
1344
1345 if (UseFastLocking) {
1346 #ifdef _LP64
1347 const Register thread = r15_thread;
1348 #else
1349 const Register thread = header_reg;
1350 get_thread(thread);
1351 #endif
1352 // Handle unstructured locking.
1353 Register tmp = swap_reg;
1354 movptr(tmp, Address(thread, JavaThread::lock_stack_current_offset()));
1355 cmpptr(obj_reg, Address(tmp, -oopSize));
1356 jcc(Assembler::notEqual, slow_case);
1357 // Try to swing header from locked to unlock.
1358 movptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1359 andptr(swap_reg, ~(int32_t)markWord::lock_mask_in_place);
1360 fast_unlock_impl(obj_reg, swap_reg, header_reg, slow_case);
1361 } else {
1362 // Load the old header from BasicLock structure
1363 movptr(header_reg, Address(swap_reg,
1364 BasicLock::displaced_header_offset_in_bytes()));
1365
1366 // Test for recursion
1367 testptr(header_reg, header_reg);
1368
1369 // zero for recursive case
1370 jcc(Assembler::zero, count_locking);
1371
1372 // Atomic swap back the old header
1373 lock();
1374 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1375
1376 // zero for simple unlock of a stack-lock case
1377 jcc(Assembler::notZero, slow_case);
1378
1379 bind(count_locking);
1380 }
1381 dec_held_monitor_count();
1382 jmp(done);
1383
1384 bind(slow_case);
1385 // Call the runtime routine for slow case.
1386 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
1387 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1388
1389 bind(done);
1390
1391 restore_bcp();
1392 }
1393 }
1394
1395 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1396 Label& zero_continue) {
1397 assert(ProfileInterpreter, "must be profiling interpreter");
1398 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1399 testptr(mdp, mdp);
1400 jcc(Assembler::zero, zero_continue);
1401 }
1402
1403
1404 // Set the method data pointer for the current bcp.
1405 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1406 assert(ProfileInterpreter, "must be profiling interpreter");
1407 Label set_mdp;
1408 push(rax);
1409 push(rbx);
1410
1411 get_method(rbx);
1412 // Test MDO to avoid the call if it is NULL.
1413 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1414 testptr(rax, rax);
1415 jcc(Assembler::zero, set_mdp);
1416 // rbx: method
1417 // _bcp_register: bcp
1418 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1419 // rax: mdi
1420 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1421 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1422 addptr(rbx, in_bytes(MethodData::data_offset()));
1423 addptr(rax, rbx);
1424 bind(set_mdp);
1425 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1426 pop(rbx);
1427 pop(rax);
1428 }
1429
1430 void InterpreterMacroAssembler::verify_method_data_pointer() {
1431 assert(ProfileInterpreter, "must be profiling interpreter");
1432 #ifdef ASSERT
1433 Label verify_continue;
1434 push(rax);
1435 push(rbx);
1436 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1437 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1438 push(arg3_reg);
1439 push(arg2_reg);
1440 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1441 get_method(rbx);
1442
1443 // If the mdp is valid, it will point to a DataLayout header which is
1444 // consistent with the bcp. The converse is highly probable also.
1445 load_unsigned_short(arg2_reg,
1446 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1447 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1448 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1449 cmpptr(arg2_reg, _bcp_register);
1450 jcc(Assembler::equal, verify_continue);
1451 // rbx: method
1452 // _bcp_register: bcp
1453 // c_rarg3: mdp
1454 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1455 rbx, _bcp_register, arg3_reg);
1456 bind(verify_continue);
1457 pop(arg2_reg);
1458 pop(arg3_reg);
1459 pop(rbx);
1460 pop(rax);
1461 #endif // ASSERT
1462 }
1463
1464
1465 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1466 int constant,
1467 Register value) {
1468 assert(ProfileInterpreter, "must be profiling interpreter");
1469 Address data(mdp_in, constant);
1470 movptr(data, value);
1471 }
1472
1473
1474 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1475 int constant,
1476 bool decrement) {
1477 // Counter address
1478 Address data(mdp_in, constant);
1479
1480 increment_mdp_data_at(data, decrement);
1481 }
1482
1483 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1484 bool decrement) {
1485 assert(ProfileInterpreter, "must be profiling interpreter");
1486 // %%% this does 64bit counters at best it is wasting space
1487 // at worst it is a rare bug when counters overflow
1488
1489 if (decrement) {
1490 // Decrement the register. Set condition codes.
1491 addptr(data, -DataLayout::counter_increment);
1492 // If the decrement causes the counter to overflow, stay negative
1493 Label L;
1494 jcc(Assembler::negative, L);
1495 addptr(data, DataLayout::counter_increment);
1496 bind(L);
1497 } else {
1498 assert(DataLayout::counter_increment == 1,
1499 "flow-free idiom only works with 1");
1500 // Increment the register. Set carry flag.
1501 addptr(data, DataLayout::counter_increment);
1502 // If the increment causes the counter to overflow, pull back by 1.
1503 sbbptr(data, 0);
1504 }
1505 }
1506
1507
1508 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1509 Register reg,
1510 int constant,
1511 bool decrement) {
1512 Address data(mdp_in, reg, Address::times_1, constant);
1513
1514 increment_mdp_data_at(data, decrement);
1515 }
1516
1517 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1518 int flag_byte_constant) {
1519 assert(ProfileInterpreter, "must be profiling interpreter");
1520 int header_offset = in_bytes(DataLayout::flags_offset());
1521 int header_bits = flag_byte_constant;
1522 // Set the flag
1523 orb(Address(mdp_in, header_offset), header_bits);
1524 }
1525
1526
1527
1528 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1529 int offset,
1530 Register value,
1531 Register test_value_out,
1532 Label& not_equal_continue) {
1533 assert(ProfileInterpreter, "must be profiling interpreter");
1534 if (test_value_out == noreg) {
1535 cmpptr(value, Address(mdp_in, offset));
1536 } else {
1537 // Put the test value into a register, so caller can use it:
1538 movptr(test_value_out, Address(mdp_in, offset));
1539 cmpptr(test_value_out, value);
1540 }
1541 jcc(Assembler::notEqual, not_equal_continue);
1542 }
1543
1544
1545 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1546 int offset_of_disp) {
1547 assert(ProfileInterpreter, "must be profiling interpreter");
1548 Address disp_address(mdp_in, offset_of_disp);
1549 addptr(mdp_in, disp_address);
1550 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1551 }
1552
1553
1554 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1555 Register reg,
1556 int offset_of_disp) {
1557 assert(ProfileInterpreter, "must be profiling interpreter");
1558 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1559 addptr(mdp_in, disp_address);
1560 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1561 }
1562
1563
1564 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1565 int constant) {
1566 assert(ProfileInterpreter, "must be profiling interpreter");
1567 addptr(mdp_in, constant);
1568 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1569 }
1570
1571
1572 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1573 assert(ProfileInterpreter, "must be profiling interpreter");
1574 push(return_bci); // save/restore across call_VM
1575 call_VM(noreg,
1576 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1577 return_bci);
1578 pop(return_bci);
1579 }
1580
1581
1582 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1583 Register bumped_count) {
1584 if (ProfileInterpreter) {
1585 Label profile_continue;
1586
1587 // If no method data exists, go to profile_continue.
1588 // Otherwise, assign to mdp
1589 test_method_data_pointer(mdp, profile_continue);
1590
1591 // We are taking a branch. Increment the taken count.
1592 // We inline increment_mdp_data_at to return bumped_count in a register
1593 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1594 Address data(mdp, in_bytes(JumpData::taken_offset()));
1595 movptr(bumped_count, data);
1596 assert(DataLayout::counter_increment == 1,
1597 "flow-free idiom only works with 1");
1598 addptr(bumped_count, DataLayout::counter_increment);
1599 sbbptr(bumped_count, 0);
1600 movptr(data, bumped_count); // Store back out
1601
1602 // The method data pointer needs to be updated to reflect the new target.
1603 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1604 bind(profile_continue);
1605 }
1606 }
1607
1608
1609 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1610 if (ProfileInterpreter) {
1611 Label profile_continue;
1612
1613 // If no method data exists, go to profile_continue.
1614 test_method_data_pointer(mdp, profile_continue);
1615
1616 // We are taking a branch. Increment the not taken count.
1617 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1618
1619 // The method data pointer needs to be updated to correspond to
1620 // the next bytecode
1621 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1622 bind(profile_continue);
1623 }
1624 }
1625
1626 void InterpreterMacroAssembler::profile_call(Register mdp) {
1627 if (ProfileInterpreter) {
1628 Label profile_continue;
1629
1630 // If no method data exists, go to profile_continue.
1631 test_method_data_pointer(mdp, profile_continue);
1632
1633 // We are making a call. Increment the count.
1634 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1635
1636 // The method data pointer needs to be updated to reflect the new target.
1637 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1638 bind(profile_continue);
1639 }
1640 }
1641
1642
1643 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1644 if (ProfileInterpreter) {
1645 Label profile_continue;
1646
1647 // If no method data exists, go to profile_continue.
1648 test_method_data_pointer(mdp, profile_continue);
1649
1650 // We are making a call. Increment the count.
1651 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1652
1653 // The method data pointer needs to be updated to reflect the new target.
1654 update_mdp_by_constant(mdp,
1655 in_bytes(VirtualCallData::
1656 virtual_call_data_size()));
1657 bind(profile_continue);
1658 }
1659 }
1660
1661
1662 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1663 Register mdp,
1664 Register reg2,
1665 bool receiver_can_be_null) {
1666 if (ProfileInterpreter) {
1667 Label profile_continue;
1668
1669 // If no method data exists, go to profile_continue.
1670 test_method_data_pointer(mdp, profile_continue);
1671
1672 Label skip_receiver_profile;
1673 if (receiver_can_be_null) {
1674 Label not_null;
1675 testptr(receiver, receiver);
1676 jccb(Assembler::notZero, not_null);
1677 // We are making a call. Increment the count for null receiver.
1678 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1679 jmp(skip_receiver_profile);
1680 bind(not_null);
1681 }
1682
1683 // Record the receiver type.
1684 record_klass_in_profile(receiver, mdp, reg2, true);
1685 bind(skip_receiver_profile);
1686
1687 // The method data pointer needs to be updated to reflect the new target.
1688 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1689 bind(profile_continue);
1690 }
1691 }
1692
1693 // This routine creates a state machine for updating the multi-row
1694 // type profile at a virtual call site (or other type-sensitive bytecode).
1695 // The machine visits each row (of receiver/count) until the receiver type
1696 // is found, or until it runs out of rows. At the same time, it remembers
1697 // the location of the first empty row. (An empty row records null for its
1698 // receiver, and can be allocated for a newly-observed receiver type.)
1699 // Because there are two degrees of freedom in the state, a simple linear
1700 // search will not work; it must be a decision tree. Hence this helper
1701 // function is recursive, to generate the required tree structured code.
1702 // It's the interpreter, so we are trading off code space for speed.
1703 // See below for example code.
1704 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1705 Register receiver, Register mdp,
1706 Register reg2, int start_row,
1707 Label& done, bool is_virtual_call) {
1708 if (TypeProfileWidth == 0) {
1709 if (is_virtual_call) {
1710 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1711 }
1712 #if INCLUDE_JVMCI
1713 else if (EnableJVMCI) {
1714 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1715 }
1716 #endif // INCLUDE_JVMCI
1717 } else {
1718 int non_profiled_offset = -1;
1719 if (is_virtual_call) {
1720 non_profiled_offset = in_bytes(CounterData::count_offset());
1721 }
1722 #if INCLUDE_JVMCI
1723 else if (EnableJVMCI) {
1724 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1725 }
1726 #endif // INCLUDE_JVMCI
1727
1728 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1729 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1730 }
1731 }
1732
1733 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1734 Register reg2, int start_row, Label& done, int total_rows,
1735 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1736 int non_profiled_offset) {
1737 int last_row = total_rows - 1;
1738 assert(start_row <= last_row, "must be work left to do");
1739 // Test this row for both the item and for null.
1740 // Take any of three different outcomes:
1741 // 1. found item => increment count and goto done
1742 // 2. found null => keep looking for case 1, maybe allocate this cell
1743 // 3. found something else => keep looking for cases 1 and 2
1744 // Case 3 is handled by a recursive call.
1745 for (int row = start_row; row <= last_row; row++) {
1746 Label next_test;
1747 bool test_for_null_also = (row == start_row);
1748
1749 // See if the item is item[n].
1750 int item_offset = in_bytes(item_offset_fn(row));
1751 test_mdp_data_at(mdp, item_offset, item,
1752 (test_for_null_also ? reg2 : noreg),
1753 next_test);
1754 // (Reg2 now contains the item from the CallData.)
1755
1756 // The item is item[n]. Increment count[n].
1757 int count_offset = in_bytes(item_count_offset_fn(row));
1758 increment_mdp_data_at(mdp, count_offset);
1759 jmp(done);
1760 bind(next_test);
1761
1762 if (test_for_null_also) {
1763 // Failed the equality check on item[n]... Test for null.
1764 testptr(reg2, reg2);
1765 if (start_row == last_row) {
1766 // The only thing left to do is handle the null case.
1767 if (non_profiled_offset >= 0) {
1768 Label found_null;
1769 jccb(Assembler::zero, found_null);
1770 // Item did not match any saved item and there is no empty row for it.
1771 // Increment total counter to indicate polymorphic case.
1772 increment_mdp_data_at(mdp, non_profiled_offset);
1773 jmp(done);
1774 bind(found_null);
1775 } else {
1776 jcc(Assembler::notZero, done);
1777 }
1778 break;
1779 }
1780 Label found_null;
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::_interp_verify_oop(Register reg, TosState state, const char* file, int line) {
1999 if (state == atos) {
2000 MacroAssembler::_verify_oop_checked(reg, "broken oop", file, line);
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) == 0
2014 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, Address mask,
2015 Register scratch, Label* where) {
2016 // This update is actually not atomic and can lose a number of updates
2017 // under heavy contention, but the alternative of using the (contended)
2018 // atomic update here penalizes profiling paths too much.
2019 movl(scratch, counter_addr);
2020 incrementl(scratch, InvocationCounter::count_increment);
2021 movl(counter_addr, scratch);
2022 andl(scratch, mask);
2023 if (where != NULL) {
2024 jcc(Assembler::zero, *where);
2025 }
2026 }
2027
2028 void InterpreterMacroAssembler::notify_method_entry() {
2029 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2030 // track stack depth. If it is possible to enter interp_only_mode we add
2031 // the code to check if the event should be sent.
2032 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2033 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2034 if (JvmtiExport::can_post_interpreter_events()) {
2035 Label L;
2036 NOT_LP64(get_thread(rthread);)
2037 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2038 testl(rdx, rdx);
2039 jcc(Assembler::zero, L);
2040 call_VM(noreg, CAST_FROM_FN_PTR(address,
2041 InterpreterRuntime::post_method_entry));
2042 bind(L);
2043 }
2044
2045 {
2046 SkipIfEqual skip(this, &DTraceMethodProbes, false, rscratch1);
2047 NOT_LP64(get_thread(rthread);)
2048 get_method(rarg);
2049 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2050 rthread, rarg);
2051 }
2052
2053 // RedefineClasses() tracing support for obsolete method entry
2054 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2055 NOT_LP64(get_thread(rthread);)
2056 get_method(rarg);
2057 call_VM_leaf(
2058 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2059 rthread, rarg);
2060 }
2061 }
2062
2063
2064 void InterpreterMacroAssembler::notify_method_exit(
2065 TosState state, NotifyMethodExitMode mode) {
2066 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2067 // track stack depth. If it is possible to enter interp_only_mode we add
2068 // the code to check if the event should be sent.
2069 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2070 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2071 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2072 Label L;
2073 // Note: frame::interpreter_frame_result has a dependency on how the
2074 // method result is saved across the call to post_method_exit. If this
2075 // is changed then the interpreter_frame_result implementation will
2076 // need to be updated too.
2077
2078 // template interpreter will leave the result on the top of the stack.
2079 push(state);
2080 NOT_LP64(get_thread(rthread);)
2081 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2082 testl(rdx, rdx);
2083 jcc(Assembler::zero, L);
2084 call_VM(noreg,
2085 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2086 bind(L);
2087 pop(state);
2088 }
2089
2090 {
2091 SkipIfEqual skip(this, &DTraceMethodProbes, false, rscratch1);
2092 push(state);
2093 NOT_LP64(get_thread(rthread);)
2094 get_method(rarg);
2095 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2096 rthread, rarg);
2097 pop(state);
2098 }
2099 }