1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "logging/log.hpp"
30 #include "oops/arrayOop.hpp"
31 #include "oops/markOop.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/method.hpp"
34 #include "prims/jvmtiExport.hpp"
35 #include "prims/jvmtiThreadState.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/safepointMechanism.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/thread.inline.hpp"
41
42 // Implementation of InterpreterMacroAssembler
43
44 void InterpreterMacroAssembler::jump_to_entry(address entry) {
45 assert(entry, "Entry must have been generated by now");
46 jump(RuntimeAddress(entry));
47 }
48
49 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
50 Label update, next, none;
51
52 verify_oop(obj);
53
54 testptr(obj, obj);
55 jccb(Assembler::notZero, update);
56 orptr(mdo_addr, TypeEntries::null_seen);
57 jmpb(next);
58
59 bind(update);
60 load_klass(obj, obj);
61
62 xorptr(obj, mdo_addr);
63 testptr(obj, TypeEntries::type_klass_mask);
64 jccb(Assembler::zero, next); // klass seen before, nothing to
65 // do. The unknown bit may have been
66 // set already but no need to check.
67
68 testptr(obj, TypeEntries::type_unknown);
69 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
70
71 cmpptr(mdo_addr, 0);
72 jccb(Assembler::equal, none);
73 cmpptr(mdo_addr, TypeEntries::null_seen);
74 jccb(Assembler::equal, none);
75 // There is a chance that the checks above (re-reading profiling
76 // data from memory) fail if another thread has just set the
77 // profiling to this obj's klass
78 xorptr(obj, mdo_addr);
79 testptr(obj, TypeEntries::type_klass_mask);
80 jccb(Assembler::zero, next);
81
82 // different than before. Cannot keep accurate profile.
83 orptr(mdo_addr, TypeEntries::type_unknown);
84 jmpb(next);
85
86 bind(none);
87 // first time here. Set profile type.
88 movptr(mdo_addr, obj);
89
90 bind(next);
91 }
92
93 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
94 if (!ProfileInterpreter) {
95 return;
96 }
97
98 if (MethodData::profile_arguments() || MethodData::profile_return()) {
99 Label profile_continue;
100
101 test_method_data_pointer(mdp, profile_continue);
102
103 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
104
105 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
106 jcc(Assembler::notEqual, profile_continue);
107
108 if (MethodData::profile_arguments()) {
109 Label done;
110 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
111 addptr(mdp, off_to_args);
112
113 for (int i = 0; i < TypeProfileArgsLimit; i++) {
114 if (i > 0 || MethodData::profile_return()) {
115 // If return value type is profiled we may have no argument to profile
116 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
117 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
118 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
119 jcc(Assembler::less, done);
120 }
121 movptr(tmp, Address(callee, Method::const_offset()));
122 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
123 // stack offset o (zero based) from the start of the argument
124 // list, for n arguments translates into offset n - o - 1 from
125 // the end of the argument list
126 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
127 subl(tmp, 1);
128 Address arg_addr = argument_address(tmp);
129 movptr(tmp, arg_addr);
130
131 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
132 profile_obj_type(tmp, mdo_arg_addr);
133
134 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
135 addptr(mdp, to_add);
136 off_to_args += to_add;
137 }
138
139 if (MethodData::profile_return()) {
140 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
141 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
142 }
143
144 bind(done);
145
146 if (MethodData::profile_return()) {
147 // We're right after the type profile for the last
148 // argument. tmp is the number of cells left in the
149 // CallTypeData/VirtualCallTypeData to reach its end. Non null
150 // if there's a return to profile.
151 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
152 shll(tmp, exact_log2(DataLayout::cell_size));
153 addptr(mdp, tmp);
154 }
155 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
156 } else {
157 assert(MethodData::profile_return(), "either profile call args or call ret");
158 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
159 }
160
161 // mdp points right after the end of the
162 // CallTypeData/VirtualCallTypeData, right after the cells for the
163 // return value type if there's one
164
165 bind(profile_continue);
166 }
167 }
168
169 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
170 assert_different_registers(mdp, ret, tmp, _bcp_register);
171 if (ProfileInterpreter && MethodData::profile_return()) {
172 Label profile_continue, done;
173
174 test_method_data_pointer(mdp, profile_continue);
175
176 if (MethodData::profile_return_jsr292_only()) {
177 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
178
179 // If we don't profile all invoke bytecodes we must make sure
180 // it's a bytecode we indeed profile. We can't go back to the
181 // begining of the ProfileData we intend to update to check its
182 // type because we're right after it and we don't known its
183 // length
184 Label do_profile;
185 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
186 jcc(Assembler::equal, do_profile);
187 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
188 jcc(Assembler::equal, do_profile);
189 get_method(tmp);
190 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
191 jcc(Assembler::notEqual, profile_continue);
192
193 bind(do_profile);
194 }
195
196 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
197 mov(tmp, ret);
198 profile_obj_type(tmp, mdo_ret_addr);
199
200 bind(profile_continue);
201 }
202 }
203
204 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
205 if (ProfileInterpreter && MethodData::profile_parameters()) {
206 Label profile_continue, done;
207
208 test_method_data_pointer(mdp, profile_continue);
209
210 // Load the offset of the area within the MDO used for
211 // parameters. If it's negative we're not profiling any parameters
212 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
213 testl(tmp1, tmp1);
214 jcc(Assembler::negative, profile_continue);
215
216 // Compute a pointer to the area for parameters from the offset
217 // and move the pointer to the slot for the last
218 // parameters. Collect profiling from last parameter down.
219 // mdo start + parameters offset + array length - 1
220 addptr(mdp, tmp1);
221 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
222 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
223
224 Label loop;
225 bind(loop);
226
227 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
228 int type_base = in_bytes(ParametersTypeData::type_offset(0));
229 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
230 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
231 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
232
233 // load offset on the stack from the slot for this parameter
234 movptr(tmp2, arg_off);
235 negptr(tmp2);
236 // read the parameter from the local area
237 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
238
239 // profile the parameter
240 profile_obj_type(tmp2, arg_type);
241
242 // go to next parameter
243 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
244 jcc(Assembler::positive, loop);
245
246 bind(profile_continue);
247 }
248 }
249
250 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
251 int number_of_arguments) {
252 // interpreter specific
253 //
254 // Note: No need to save/restore bcp & locals registers
255 // since these are callee saved registers and no blocking/
256 // GC can happen in leaf calls.
257 // Further Note: DO NOT save/restore bcp/locals. If a caller has
258 // already saved them so that it can use rsi/rdi as temporaries
259 // then a save/restore here will DESTROY the copy the caller
260 // saved! There used to be a save_bcp() that only happened in
261 // the ASSERT path (no restore_bcp). Which caused bizarre failures
262 // when jvm built with ASSERTs.
263 #ifdef ASSERT
264 {
265 Label L;
266 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
267 jcc(Assembler::equal, L);
268 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
269 " last_sp != NULL");
270 bind(L);
271 }
272 #endif
273 // super call
274 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
275 // interpreter specific
276 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
277 // but since they may not have been saved (and we don't want to
278 // save them here (see note above) the assert is invalid.
279 }
280
281 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
282 Register java_thread,
283 Register last_java_sp,
284 address entry_point,
285 int number_of_arguments,
286 bool check_exceptions) {
287 // interpreter specific
288 //
289 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
290 // really make a difference for these runtime calls, since they are
291 // slow anyway. Btw., bcp must be saved/restored since it may change
292 // due to GC.
293 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
294 save_bcp();
295 #ifdef ASSERT
296 {
297 Label L;
298 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
299 jcc(Assembler::equal, L);
300 stop("InterpreterMacroAssembler::call_VM_base:"
301 " last_sp != NULL");
302 bind(L);
303 }
304 #endif /* ASSERT */
305 // super call
306 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
307 entry_point, number_of_arguments,
308 check_exceptions);
309 // interpreter specific
310 restore_bcp();
311 restore_locals();
312 }
313
314 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
315 if (JvmtiExport::can_pop_frame()) {
316 Label L;
317 // Initiate popframe handling only if it is not already being
318 // processed. If the flag has the popframe_processing bit set, it
319 // means that this code is called *during* popframe handling - we
320 // don't want to reenter.
321 // This method is only called just after the call into the vm in
322 // call_VM_base, so the arg registers are available.
323 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
324 LP64_ONLY(c_rarg0);
325 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
326 testl(pop_cond, JavaThread::popframe_pending_bit);
327 jcc(Assembler::zero, L);
328 testl(pop_cond, JavaThread::popframe_processing_bit);
329 jcc(Assembler::notZero, L);
330 // Call Interpreter::remove_activation_preserving_args_entry() to get the
331 // address of the same-named entrypoint in the generated interpreter code.
332 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
333 jmp(rax);
334 bind(L);
335 NOT_LP64(get_thread(java_thread);)
336 }
337 }
338
339 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
340 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
341 NOT_LP64(get_thread(thread);)
342 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
343 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
344 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
345 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
346 #ifdef _LP64
347 switch (state) {
348 case atos: movptr(rax, oop_addr);
349 movptr(oop_addr, (int32_t)NULL_WORD);
350 verify_oop(rax, state); break;
351 case ltos: movptr(rax, val_addr); break;
352 case btos: // fall through
353 case ztos: // fall through
354 case ctos: // fall through
355 case stos: // fall through
356 case itos: movl(rax, val_addr); break;
357 case ftos: load_float(val_addr); break;
358 case dtos: load_double(val_addr); break;
359 case vtos: /* nothing to do */ break;
360 default : ShouldNotReachHere();
361 }
362 // Clean up tos value in the thread object
363 movl(tos_addr, (int) ilgl);
364 movl(val_addr, (int32_t) NULL_WORD);
365 #else
366 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
367 + in_ByteSize(wordSize));
368 switch (state) {
369 case atos: movptr(rax, oop_addr);
370 movptr(oop_addr, NULL_WORD);
371 verify_oop(rax, state); break;
372 case ltos:
373 movl(rdx, val_addr1); // fall through
374 case btos: // fall through
375 case ztos: // fall through
376 case ctos: // fall through
377 case stos: // fall through
378 case itos: movl(rax, val_addr); break;
379 case ftos: load_float(val_addr); break;
380 case dtos: load_double(val_addr); break;
381 case vtos: /* nothing to do */ break;
382 default : ShouldNotReachHere();
383 }
384 #endif // _LP64
385 // Clean up tos value in the thread object
386 movl(tos_addr, (int32_t) ilgl);
387 movptr(val_addr, NULL_WORD);
388 NOT_LP64(movptr(val_addr1, NULL_WORD);)
389 }
390
391
392 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
393 if (JvmtiExport::can_force_early_return()) {
394 Label L;
395 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
396 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
397
398 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
399 testptr(tmp, tmp);
400 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
401
402 // Initiate earlyret handling only if it is not already being processed.
403 // If the flag has the earlyret_processing bit set, it means that this code
404 // is called *during* earlyret handling - we don't want to reenter.
405 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
406 cmpl(tmp, JvmtiThreadState::earlyret_pending);
407 jcc(Assembler::notEqual, L);
408
409 // Call Interpreter::remove_activation_early_entry() to get the address of the
410 // same-named entrypoint in the generated interpreter code.
411 NOT_LP64(get_thread(java_thread);)
412 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
413 #ifdef _LP64
414 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
415 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
416 #else
417 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
418 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
419 #endif // _LP64
420 jmp(rax);
421 bind(L);
422 NOT_LP64(get_thread(java_thread);)
423 }
424 }
425
426 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
427 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
428 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
429 bswapl(reg);
430 shrl(reg, 16);
431 }
432
433 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
434 int bcp_offset,
435 size_t index_size) {
436 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
437 if (index_size == sizeof(u2)) {
438 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
439 } else if (index_size == sizeof(u4)) {
440 movl(index, Address(_bcp_register, bcp_offset));
441 // Check if the secondary index definition is still ~x, otherwise
442 // we have to change the following assembler code to calculate the
443 // plain index.
444 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
445 notl(index); // convert to plain index
446 } else if (index_size == sizeof(u1)) {
447 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
448 } else {
449 ShouldNotReachHere();
450 }
451 }
452
453 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
454 Register index,
455 int bcp_offset,
456 size_t index_size) {
457 assert_different_registers(cache, index);
458 get_cache_index_at_bcp(index, bcp_offset, index_size);
459 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
460 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
461 // convert from field index to ConstantPoolCacheEntry index
462 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
463 shll(index, 2);
464 }
465
466 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
467 Register index,
468 Register bytecode,
469 int byte_no,
470 int bcp_offset,
471 size_t index_size) {
472 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
473 // We use a 32-bit load here since the layout of 64-bit words on
474 // little-endian machines allow us that.
475 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
476 const int shift_count = (1 + byte_no) * BitsPerByte;
477 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
478 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
479 "correct shift count");
480 shrl(bytecode, shift_count);
481 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
482 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
483 }
484
485 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
486 Register tmp,
487 int bcp_offset,
488 size_t index_size) {
489 assert(cache != tmp, "must use different register");
490 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
491 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
492 // convert from field index to ConstantPoolCacheEntry index
493 // and from word offset to byte offset
494 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
495 shll(tmp, 2 + LogBytesPerWord);
496 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
497 // skip past the header
498 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
499 addptr(cache, tmp); // construct pointer to cache entry
500 }
501
502 // Load object from cpool->resolved_references(index)
503 void InterpreterMacroAssembler::load_resolved_reference_at_index(
504 Register result, Register index) {
505 assert_different_registers(result, index);
506 // convert from field index to resolved_references() index and from
507 // word index to byte offset. Since this is a java object, it can be compressed
508 Register tmp = index; // reuse
509 shll(tmp, LogBytesPerHeapOop);
510
511 get_constant_pool(result);
512 // load pointer for resolved_references[] objArray
513 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes()));
514 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes()));
515 resolve_oop_handle(result);
516 // Add in the index
517 addptr(result, tmp);
518 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
519 // The resulting oop is null if the reference is not yet resolved.
520 // It is Universe::the_null_sentinel() if the reference resolved to NULL via condy.
521 }
522
523 // load cpool->resolved_klass_at(index)
524 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool,
525 Register index, Register klass) {
526 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool)));
527 Register resolved_klasses = cpool;
528 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes()));
529 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes()));
530 }
531
532 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
533 // subtype of super_klass.
534 //
535 // Args:
536 // rax: superklass
537 // Rsub_klass: subklass
538 //
539 // Kills:
540 // rcx, rdi
541 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
542 Label& ok_is_subtype) {
543 assert(Rsub_klass != rax, "rax holds superklass");
544 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
545 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
546 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
547 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
548
549 // Profile the not-null value's klass.
550 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
551
552 // Do the check.
553 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
554
555 // Profile the failure of the check.
556 profile_typecheck_failed(rcx); // blows rcx
557 }
558
559
560 #ifndef _LP64
561 void InterpreterMacroAssembler::f2ieee() {
562 if (IEEEPrecision) {
563 fstp_s(Address(rsp, 0));
564 fld_s(Address(rsp, 0));
565 }
566 }
567
568
569 void InterpreterMacroAssembler::d2ieee() {
570 if (IEEEPrecision) {
571 fstp_d(Address(rsp, 0));
572 fld_d(Address(rsp, 0));
573 }
574 }
575 #endif // _LP64
576
577 // Java Expression Stack
578
579 void InterpreterMacroAssembler::pop_ptr(Register r) {
580 pop(r);
581 }
582
583 void InterpreterMacroAssembler::push_ptr(Register r) {
584 push(r);
585 }
586
587 void InterpreterMacroAssembler::push_i(Register r) {
588 push(r);
589 }
590
591 void InterpreterMacroAssembler::push_f(XMMRegister r) {
592 subptr(rsp, wordSize);
593 movflt(Address(rsp, 0), r);
594 }
595
596 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
597 movflt(r, Address(rsp, 0));
598 addptr(rsp, wordSize);
599 }
600
601 void InterpreterMacroAssembler::push_d(XMMRegister r) {
602 subptr(rsp, 2 * wordSize);
603 movdbl(Address(rsp, 0), r);
604 }
605
606 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
607 movdbl(r, Address(rsp, 0));
608 addptr(rsp, 2 * Interpreter::stackElementSize);
609 }
610
611 #ifdef _LP64
612 void InterpreterMacroAssembler::pop_i(Register r) {
613 // XXX can't use pop currently, upper half non clean
614 movl(r, Address(rsp, 0));
615 addptr(rsp, wordSize);
616 }
617
618 void InterpreterMacroAssembler::pop_l(Register r) {
619 movq(r, Address(rsp, 0));
620 addptr(rsp, 2 * Interpreter::stackElementSize);
621 }
622
623 void InterpreterMacroAssembler::push_l(Register r) {
624 subptr(rsp, 2 * wordSize);
625 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
626 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
627 }
628
629 void InterpreterMacroAssembler::pop(TosState state) {
630 switch (state) {
631 case atos: pop_ptr(); break;
632 case btos:
633 case ztos:
634 case ctos:
635 case stos:
636 case itos: pop_i(); break;
637 case ltos: pop_l(); break;
638 case ftos: pop_f(xmm0); break;
639 case dtos: pop_d(xmm0); break;
640 case vtos: /* nothing to do */ break;
641 default: ShouldNotReachHere();
642 }
643 verify_oop(rax, state);
644 }
645
646 void InterpreterMacroAssembler::push(TosState state) {
647 verify_oop(rax, state);
648 switch (state) {
649 case atos: push_ptr(); break;
650 case btos:
651 case ztos:
652 case ctos:
653 case stos:
654 case itos: push_i(); break;
655 case ltos: push_l(); break;
656 case ftos: push_f(xmm0); break;
657 case dtos: push_d(xmm0); break;
658 case vtos: /* nothing to do */ break;
659 default : ShouldNotReachHere();
660 }
661 }
662 #else
663 void InterpreterMacroAssembler::pop_i(Register r) {
664 pop(r);
665 }
666
667 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
668 pop(lo);
669 pop(hi);
670 }
671
672 void InterpreterMacroAssembler::pop_f() {
673 fld_s(Address(rsp, 0));
674 addptr(rsp, 1 * wordSize);
675 }
676
677 void InterpreterMacroAssembler::pop_d() {
678 fld_d(Address(rsp, 0));
679 addptr(rsp, 2 * wordSize);
680 }
681
682
683 void InterpreterMacroAssembler::pop(TosState state) {
684 switch (state) {
685 case atos: pop_ptr(rax); break;
686 case btos: // fall through
687 case ztos: // fall through
688 case ctos: // fall through
689 case stos: // fall through
690 case itos: pop_i(rax); break;
691 case ltos: pop_l(rax, rdx); break;
692 case ftos:
693 if (UseSSE >= 1) {
694 pop_f(xmm0);
695 } else {
696 pop_f();
697 }
698 break;
699 case dtos:
700 if (UseSSE >= 2) {
701 pop_d(xmm0);
702 } else {
703 pop_d();
704 }
705 break;
706 case vtos: /* nothing to do */ break;
707 default : ShouldNotReachHere();
708 }
709 verify_oop(rax, state);
710 }
711
712
713 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
714 push(hi);
715 push(lo);
716 }
717
718 void InterpreterMacroAssembler::push_f() {
719 // Do not schedule for no AGI! Never write beyond rsp!
720 subptr(rsp, 1 * wordSize);
721 fstp_s(Address(rsp, 0));
722 }
723
724 void InterpreterMacroAssembler::push_d() {
725 // Do not schedule for no AGI! Never write beyond rsp!
726 subptr(rsp, 2 * wordSize);
727 fstp_d(Address(rsp, 0));
728 }
729
730
731 void InterpreterMacroAssembler::push(TosState state) {
732 verify_oop(rax, state);
733 switch (state) {
734 case atos: push_ptr(rax); break;
735 case btos: // fall through
736 case ztos: // fall through
737 case ctos: // fall through
738 case stos: // fall through
739 case itos: push_i(rax); break;
740 case ltos: push_l(rax, rdx); break;
741 case ftos:
742 if (UseSSE >= 1) {
743 push_f(xmm0);
744 } else {
745 push_f();
746 }
747 break;
748 case dtos:
749 if (UseSSE >= 2) {
750 push_d(xmm0);
751 } else {
752 push_d();
753 }
754 break;
755 case vtos: /* nothing to do */ break;
756 default : ShouldNotReachHere();
757 }
758 }
759 #endif // _LP64
760
761
762 // Helpers for swap and dup
763 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
764 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
765 }
766
767 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
768 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
769 }
770
771
772 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
773 // set sender sp
774 lea(_bcp_register, Address(rsp, wordSize));
775 // record last_sp
776 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
777 }
778
779
780 // Jump to from_interpreted entry of a call unless single stepping is possible
781 // in this thread in which case we must call the i2i entry
782 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
783 prepare_to_jump_from_interpreted();
784
785 if (JvmtiExport::can_post_interpreter_events()) {
786 Label run_compiled_code;
787 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
788 // compiled code in threads for which the event is enabled. Check here for
789 // interp_only_mode if these events CAN be enabled.
790 // interp_only is an int, on little endian it is sufficient to test the byte only
791 // Is a cmpl faster?
792 LP64_ONLY(temp = r15_thread;)
793 NOT_LP64(get_thread(temp);)
794 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
795 jccb(Assembler::zero, run_compiled_code);
796 jmp(Address(method, Method::interpreter_entry_offset()));
797 bind(run_compiled_code);
798 }
799
800 jmp(Address(method, Method::from_interpreted_offset()));
801 }
802
803 // The following two routines provide a hook so that an implementation
804 // can schedule the dispatch in two parts. x86 does not do this.
805 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
806 // Nothing x86 specific to be done here
807 }
808
809 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
810 dispatch_next(state, step);
811 }
812
813 void InterpreterMacroAssembler::dispatch_base(TosState state,
814 address* table,
815 bool verifyoop,
816 bool generate_poll) {
817 verify_FPU(1, state);
818 if (VerifyActivationFrameSize) {
819 Label L;
820 mov(rcx, rbp);
821 subptr(rcx, rsp);
822 int32_t min_frame_size =
823 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
824 wordSize;
825 cmpptr(rcx, (int32_t)min_frame_size);
826 jcc(Assembler::greaterEqual, L);
827 stop("broken stack frame");
828 bind(L);
829 }
830 if (verifyoop) {
831 verify_oop(rax, state);
832 }
833
834 address* const safepoint_table = Interpreter::safept_table(state);
835 #ifdef _LP64
836 Label no_safepoint, dispatch;
837 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
838 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
839 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
840
841 jccb(Assembler::zero, no_safepoint);
842 lea(rscratch1, ExternalAddress((address)safepoint_table));
843 jmpb(dispatch);
844 }
845
846 bind(no_safepoint);
847 lea(rscratch1, ExternalAddress((address)table));
848 bind(dispatch);
849 jmp(Address(rscratch1, rbx, Address::times_8));
850
851 #else
852 Address index(noreg, rbx, Address::times_ptr);
853 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
854 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
855 Label no_safepoint;
856 const Register thread = rcx;
857 get_thread(thread);
858 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
859
860 jccb(Assembler::zero, no_safepoint);
861 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
862 jump(dispatch_addr);
863 bind(no_safepoint);
864 }
865
866 {
867 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
868 jump(dispatch_addr);
869 }
870 #endif // _LP64
871 }
872
873 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
874 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
875 }
876
877 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
878 dispatch_base(state, Interpreter::normal_table(state));
879 }
880
881 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
882 dispatch_base(state, Interpreter::normal_table(state), false);
883 }
884
885
886 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
887 // load next bytecode (load before advancing _bcp_register to prevent AGI)
888 load_unsigned_byte(rbx, Address(_bcp_register, step));
889 // advance _bcp_register
890 increment(_bcp_register, step);
891 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
892 }
893
894 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
895 // load current bytecode
896 load_unsigned_byte(rbx, Address(_bcp_register, 0));
897 dispatch_base(state, table);
898 }
899
900 void InterpreterMacroAssembler::narrow(Register result) {
901
902 // Get method->_constMethod->_result_type
903 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
904 movptr(rcx, Address(rcx, Method::const_offset()));
905 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
906
907 Label done, notBool, notByte, notChar;
908
909 // common case first
910 cmpl(rcx, T_INT);
911 jcc(Assembler::equal, done);
912
913 // mask integer result to narrower return type.
914 cmpl(rcx, T_BOOLEAN);
915 jcc(Assembler::notEqual, notBool);
916 andl(result, 0x1);
917 jmp(done);
918
919 bind(notBool);
920 cmpl(rcx, T_BYTE);
921 jcc(Assembler::notEqual, notByte);
922 LP64_ONLY(movsbl(result, result);)
923 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
924 NOT_LP64(sarl(result, 24);) // and sign-extend byte
925 jmp(done);
926
927 bind(notByte);
928 cmpl(rcx, T_CHAR);
929 jcc(Assembler::notEqual, notChar);
930 LP64_ONLY(movzwl(result, result);)
931 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
932 jmp(done);
933
934 bind(notChar);
935 // cmpl(rcx, T_SHORT); // all that's left
936 // jcc(Assembler::notEqual, done);
937 LP64_ONLY(movswl(result, result);)
938 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
939 NOT_LP64(sarl(result, 16);) // and sign-extend short
940
941 // Nothing to do for T_INT
942 bind(done);
943 }
944
945 // remove activation
946 //
947 // Unlock the receiver if this is a synchronized method.
948 // Unlock any Java monitors from syncronized blocks.
949 // Remove the activation from the stack.
950 //
951 // If there are locked Java monitors
952 // If throw_monitor_exception
953 // throws IllegalMonitorStateException
954 // Else if install_monitor_exception
955 // installs IllegalMonitorStateException
956 // Else
957 // no error processing
958 void InterpreterMacroAssembler::remove_activation(
959 TosState state,
960 Register ret_addr,
961 bool throw_monitor_exception,
962 bool install_monitor_exception,
963 bool notify_jvmdi) {
964 // Note: Registers rdx xmm0 may be in use for the
965 // result check if synchronized method
966 Label unlocked, unlock, no_unlock;
967
968 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
969 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
970 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
971 // monitor pointers need different register
972 // because rdx may have the result in it
973 NOT_LP64(get_thread(rcx);)
974
975 // get the value of _do_not_unlock_if_synchronized into rdx
976 const Address do_not_unlock_if_synchronized(rthread,
977 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
978 movbool(rbx, do_not_unlock_if_synchronized);
979 movbool(do_not_unlock_if_synchronized, false); // reset the flag
980
981 // get method access flags
982 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
983 movl(rcx, Address(rcx, Method::access_flags_offset()));
984 testl(rcx, JVM_ACC_SYNCHRONIZED);
985 jcc(Assembler::zero, unlocked);
986
987 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
988 // is set.
989 testbool(rbx);
990 jcc(Assembler::notZero, no_unlock);
991
992 // unlock monitor
993 push(state); // save result
994
995 // BasicObjectLock will be first in list, since this is a
996 // synchronized method. However, need to check that the object has
997 // not been unlocked by an explicit monitorexit bytecode.
998 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
999 wordSize - (int) sizeof(BasicObjectLock));
1000 // We use c_rarg1/rdx so that if we go slow path it will be the correct
1001 // register for unlock_object to pass to VM directly
1002 lea(robj, monitor); // address of first monitor
1003
1004 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1005 testptr(rax, rax);
1006 jcc(Assembler::notZero, unlock);
1007
1008 pop(state);
1009 if (throw_monitor_exception) {
1010 // Entry already unlocked, need to throw exception
1011 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1012 call_VM(noreg, CAST_FROM_FN_PTR(address,
1013 InterpreterRuntime::throw_illegal_monitor_state_exception));
1014 should_not_reach_here();
1015 } else {
1016 // Monitor already unlocked during a stack unroll. If requested,
1017 // install an illegal_monitor_state_exception. Continue with
1018 // stack unrolling.
1019 if (install_monitor_exception) {
1020 NOT_LP64(empty_FPU_stack();)
1021 call_VM(noreg, CAST_FROM_FN_PTR(address,
1022 InterpreterRuntime::new_illegal_monitor_state_exception));
1023 }
1024 jmp(unlocked);
1025 }
1026
1027 bind(unlock);
1028 unlock_object(robj);
1029 pop(state);
1030
1031 // Check that for block-structured locking (i.e., that all locked
1032 // objects has been unlocked)
1033 bind(unlocked);
1034
1035 // rax, rdx: Might contain return value
1036
1037 // Check that all monitors are unlocked
1038 {
1039 Label loop, exception, entry, restart;
1040 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1041 const Address monitor_block_top(
1042 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1043 const Address monitor_block_bot(
1044 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1045
1046 bind(restart);
1047 // We use c_rarg1 so that if we go slow path it will be the correct
1048 // register for unlock_object to pass to VM directly
1049 movptr(rmon, monitor_block_top); // points to current entry, starting
1050 // with top-most entry
1051 lea(rbx, monitor_block_bot); // points to word before bottom of
1052 // monitor block
1053 jmp(entry);
1054
1055 // Entry already locked, need to throw exception
1056 bind(exception);
1057
1058 if (throw_monitor_exception) {
1059 // Throw exception
1060 NOT_LP64(empty_FPU_stack();)
1061 MacroAssembler::call_VM(noreg,
1062 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1063 throw_illegal_monitor_state_exception));
1064 should_not_reach_here();
1065 } else {
1066 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1067 // Unlock does not block, so don't have to worry about the frame.
1068 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1069
1070 push(state);
1071 mov(robj, rmon); // nop if robj and rmon are the same
1072 unlock_object(robj);
1073 pop(state);
1074
1075 if (install_monitor_exception) {
1076 NOT_LP64(empty_FPU_stack();)
1077 call_VM(noreg, CAST_FROM_FN_PTR(address,
1078 InterpreterRuntime::
1079 new_illegal_monitor_state_exception));
1080 }
1081
1082 jmp(restart);
1083 }
1084
1085 bind(loop);
1086 // check if current entry is used
1087 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
1088 jcc(Assembler::notEqual, exception);
1089
1090 addptr(rmon, entry_size); // otherwise advance to next entry
1091 bind(entry);
1092 cmpptr(rmon, rbx); // check if bottom reached
1093 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1094 }
1095
1096 bind(no_unlock);
1097
1098 // jvmti support
1099 if (notify_jvmdi) {
1100 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1101 } else {
1102 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1103 }
1104
1105 // remove activation
1106 // get sender sp
1107 movptr(rbx,
1108 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1109 if (StackReservedPages > 0) {
1110 // testing if reserved zone needs to be re-enabled
1111 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1112 Label no_reserved_zone_enabling;
1113
1114 NOT_LP64(get_thread(rthread);)
1115
1116 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1117 jcc(Assembler::equal, no_reserved_zone_enabling);
1118
1119 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1120 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1121
1122 call_VM_leaf(
1123 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1124 call_VM(noreg, CAST_FROM_FN_PTR(address,
1125 InterpreterRuntime::throw_delayed_StackOverflowError));
1126 should_not_reach_here();
1127
1128 bind(no_reserved_zone_enabling);
1129 }
1130 leave(); // remove frame anchor
1131 pop(ret_addr); // get return address
1132 mov(rsp, rbx); // set sp to sender sp
1133 }
1134
1135 void InterpreterMacroAssembler::get_method_counters(Register method,
1136 Register mcs, Label& skip) {
1137 Label has_counters;
1138 movptr(mcs, Address(method, Method::method_counters_offset()));
1139 testptr(mcs, mcs);
1140 jcc(Assembler::notZero, has_counters);
1141 call_VM(noreg, CAST_FROM_FN_PTR(address,
1142 InterpreterRuntime::build_method_counters), method);
1143 movptr(mcs, Address(method,Method::method_counters_offset()));
1144 testptr(mcs, mcs);
1145 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1146 bind(has_counters);
1147 }
1148
1149
1150 // Lock object
1151 //
1152 // Args:
1153 // rdx, c_rarg1: BasicObjectLock to be used for locking
1154 //
1155 // Kills:
1156 // rax, rbx
1157 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1158 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1159 "The argument is only for looks. It must be c_rarg1");
1160
1161 if (UseHeavyMonitors) {
1162 call_VM(noreg,
1163 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1164 lock_reg);
1165 } else {
1166 Label done;
1167
1168 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1169 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1170 // problematic case where tmp_reg = no_reg.
1171 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1172
1173 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1174 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1175 const int mark_offset = lock_offset +
1176 BasicLock::displaced_header_offset_in_bytes();
1177
1178 Label slow_case;
1179
1180 // Load object pointer into obj_reg
1181 movptr(obj_reg, Address(lock_reg, obj_offset));
1182
1183 if (UseBiasedLocking) {
1184 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1185 }
1186
1187 // Load immediate 1 into swap_reg %rax
1188 movl(swap_reg, (int32_t)1);
1189
1190 // Load (object->mark() | 1) into swap_reg %rax
1191 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1192
1193 // Save (object->mark() | 1) into BasicLock's displaced header
1194 movptr(Address(lock_reg, mark_offset), swap_reg);
1195
1196 assert(lock_offset == 0,
1197 "displaced header must be first word in BasicObjectLock");
1198
1199 if (os::is_MP()) lock();
1200 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1201 if (PrintBiasedLockingStatistics) {
1202 cond_inc32(Assembler::zero,
1203 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1204 }
1205 jcc(Assembler::zero, done);
1206
1207 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1208
1209 // Test if the oopMark is an obvious stack pointer, i.e.,
1210 // 1) (mark & zero_bits) == 0, and
1211 // 2) rsp <= mark < mark + os::pagesize()
1212 //
1213 // These 3 tests can be done by evaluating the following
1214 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1215 // assuming both stack pointer and pagesize have their
1216 // least significant bits clear.
1217 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1218 subptr(swap_reg, rsp);
1219 andptr(swap_reg, zero_bits - os::vm_page_size());
1220
1221 // Save the test result, for recursive case, the result is zero
1222 movptr(Address(lock_reg, mark_offset), swap_reg);
1223
1224 if (PrintBiasedLockingStatistics) {
1225 cond_inc32(Assembler::zero,
1226 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1227 }
1228 jcc(Assembler::zero, done);
1229
1230 bind(slow_case);
1231
1232 // Call the runtime routine for slow case
1233 call_VM(noreg,
1234 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1235 lock_reg);
1236
1237 bind(done);
1238 }
1239 }
1240
1241
1242 // Unlocks an object. Used in monitorexit bytecode and
1243 // remove_activation. Throws an IllegalMonitorException if object is
1244 // not locked by current thread.
1245 //
1246 // Args:
1247 // rdx, c_rarg1: BasicObjectLock for lock
1248 //
1249 // Kills:
1250 // rax
1251 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1252 // rscratch1 (scratch reg)
1253 // rax, rbx, rcx, rdx
1254 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1255 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1256 "The argument is only for looks. It must be c_rarg1");
1257
1258 if (UseHeavyMonitors) {
1259 call_VM(noreg,
1260 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1261 lock_reg);
1262 } else {
1263 Label done;
1264
1265 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1266 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1267 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1268
1269 save_bcp(); // Save in case of exception
1270
1271 // Convert from BasicObjectLock structure to object and BasicLock
1272 // structure Store the BasicLock address into %rax
1273 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1274
1275 // Load oop into obj_reg(%c_rarg3)
1276 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1277
1278 // Free entry
1279 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1280
1281 if (UseBiasedLocking) {
1282 biased_locking_exit(obj_reg, header_reg, done);
1283 }
1284
1285 // Load the old header from BasicLock structure
1286 movptr(header_reg, Address(swap_reg,
1287 BasicLock::displaced_header_offset_in_bytes()));
1288
1289 // Test for recursion
1290 testptr(header_reg, header_reg);
1291
1292 // zero for recursive case
1293 jcc(Assembler::zero, done);
1294
1295 // Atomic swap back the old header
1296 if (os::is_MP()) lock();
1297 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1298
1299 // zero for simple unlock of a stack-lock case
1300 jcc(Assembler::zero, done);
1301
1302 // Call the runtime routine for slow case.
1303 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1304 obj_reg); // restore obj
1305 call_VM(noreg,
1306 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1307 lock_reg);
1308
1309 bind(done);
1310
1311 restore_bcp();
1312 }
1313 }
1314
1315 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1316 Label& zero_continue) {
1317 assert(ProfileInterpreter, "must be profiling interpreter");
1318 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1319 testptr(mdp, mdp);
1320 jcc(Assembler::zero, zero_continue);
1321 }
1322
1323
1324 // Set the method data pointer for the current bcp.
1325 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1326 assert(ProfileInterpreter, "must be profiling interpreter");
1327 Label set_mdp;
1328 push(rax);
1329 push(rbx);
1330
1331 get_method(rbx);
1332 // Test MDO to avoid the call if it is NULL.
1333 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1334 testptr(rax, rax);
1335 jcc(Assembler::zero, set_mdp);
1336 // rbx: method
1337 // _bcp_register: bcp
1338 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1339 // rax: mdi
1340 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1341 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1342 addptr(rbx, in_bytes(MethodData::data_offset()));
1343 addptr(rax, rbx);
1344 bind(set_mdp);
1345 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1346 pop(rbx);
1347 pop(rax);
1348 }
1349
1350 void InterpreterMacroAssembler::verify_method_data_pointer() {
1351 assert(ProfileInterpreter, "must be profiling interpreter");
1352 #ifdef ASSERT
1353 Label verify_continue;
1354 push(rax);
1355 push(rbx);
1356 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1357 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1358 push(arg3_reg);
1359 push(arg2_reg);
1360 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1361 get_method(rbx);
1362
1363 // If the mdp is valid, it will point to a DataLayout header which is
1364 // consistent with the bcp. The converse is highly probable also.
1365 load_unsigned_short(arg2_reg,
1366 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1367 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1368 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1369 cmpptr(arg2_reg, _bcp_register);
1370 jcc(Assembler::equal, verify_continue);
1371 // rbx: method
1372 // _bcp_register: bcp
1373 // c_rarg3: mdp
1374 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1375 rbx, _bcp_register, arg3_reg);
1376 bind(verify_continue);
1377 pop(arg2_reg);
1378 pop(arg3_reg);
1379 pop(rbx);
1380 pop(rax);
1381 #endif // ASSERT
1382 }
1383
1384
1385 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1386 int constant,
1387 Register value) {
1388 assert(ProfileInterpreter, "must be profiling interpreter");
1389 Address data(mdp_in, constant);
1390 movptr(data, value);
1391 }
1392
1393
1394 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1395 int constant,
1396 bool decrement) {
1397 // Counter address
1398 Address data(mdp_in, constant);
1399
1400 increment_mdp_data_at(data, decrement);
1401 }
1402
1403 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1404 bool decrement) {
1405 assert(ProfileInterpreter, "must be profiling interpreter");
1406 // %%% this does 64bit counters at best it is wasting space
1407 // at worst it is a rare bug when counters overflow
1408
1409 if (decrement) {
1410 // Decrement the register. Set condition codes.
1411 addptr(data, (int32_t) -DataLayout::counter_increment);
1412 // If the decrement causes the counter to overflow, stay negative
1413 Label L;
1414 jcc(Assembler::negative, L);
1415 addptr(data, (int32_t) DataLayout::counter_increment);
1416 bind(L);
1417 } else {
1418 assert(DataLayout::counter_increment == 1,
1419 "flow-free idiom only works with 1");
1420 // Increment the register. Set carry flag.
1421 addptr(data, DataLayout::counter_increment);
1422 // If the increment causes the counter to overflow, pull back by 1.
1423 sbbptr(data, (int32_t)0);
1424 }
1425 }
1426
1427
1428 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1429 Register reg,
1430 int constant,
1431 bool decrement) {
1432 Address data(mdp_in, reg, Address::times_1, constant);
1433
1434 increment_mdp_data_at(data, decrement);
1435 }
1436
1437 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1438 int flag_byte_constant) {
1439 assert(ProfileInterpreter, "must be profiling interpreter");
1440 int header_offset = in_bytes(DataLayout::header_offset());
1441 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1442 // Set the flag
1443 orl(Address(mdp_in, header_offset), header_bits);
1444 }
1445
1446
1447
1448 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1449 int offset,
1450 Register value,
1451 Register test_value_out,
1452 Label& not_equal_continue) {
1453 assert(ProfileInterpreter, "must be profiling interpreter");
1454 if (test_value_out == noreg) {
1455 cmpptr(value, Address(mdp_in, offset));
1456 } else {
1457 // Put the test value into a register, so caller can use it:
1458 movptr(test_value_out, Address(mdp_in, offset));
1459 cmpptr(test_value_out, value);
1460 }
1461 jcc(Assembler::notEqual, not_equal_continue);
1462 }
1463
1464
1465 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1466 int offset_of_disp) {
1467 assert(ProfileInterpreter, "must be profiling interpreter");
1468 Address disp_address(mdp_in, offset_of_disp);
1469 addptr(mdp_in, disp_address);
1470 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1471 }
1472
1473
1474 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1475 Register reg,
1476 int offset_of_disp) {
1477 assert(ProfileInterpreter, "must be profiling interpreter");
1478 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1479 addptr(mdp_in, disp_address);
1480 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1481 }
1482
1483
1484 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1485 int constant) {
1486 assert(ProfileInterpreter, "must be profiling interpreter");
1487 addptr(mdp_in, constant);
1488 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1489 }
1490
1491
1492 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1493 assert(ProfileInterpreter, "must be profiling interpreter");
1494 push(return_bci); // save/restore across call_VM
1495 call_VM(noreg,
1496 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1497 return_bci);
1498 pop(return_bci);
1499 }
1500
1501
1502 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1503 Register bumped_count) {
1504 if (ProfileInterpreter) {
1505 Label profile_continue;
1506
1507 // If no method data exists, go to profile_continue.
1508 // Otherwise, assign to mdp
1509 test_method_data_pointer(mdp, profile_continue);
1510
1511 // We are taking a branch. Increment the taken count.
1512 // We inline increment_mdp_data_at to return bumped_count in a register
1513 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1514 Address data(mdp, in_bytes(JumpData::taken_offset()));
1515 movptr(bumped_count, data);
1516 assert(DataLayout::counter_increment == 1,
1517 "flow-free idiom only works with 1");
1518 addptr(bumped_count, DataLayout::counter_increment);
1519 sbbptr(bumped_count, 0);
1520 movptr(data, bumped_count); // Store back out
1521
1522 // The method data pointer needs to be updated to reflect the new target.
1523 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1524 bind(profile_continue);
1525 }
1526 }
1527
1528
1529 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1530 if (ProfileInterpreter) {
1531 Label profile_continue;
1532
1533 // If no method data exists, go to profile_continue.
1534 test_method_data_pointer(mdp, profile_continue);
1535
1536 // We are taking a branch. Increment the not taken count.
1537 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1538
1539 // The method data pointer needs to be updated to correspond to
1540 // the next bytecode
1541 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1542 bind(profile_continue);
1543 }
1544 }
1545
1546 void InterpreterMacroAssembler::profile_call(Register mdp) {
1547 if (ProfileInterpreter) {
1548 Label profile_continue;
1549
1550 // If no method data exists, go to profile_continue.
1551 test_method_data_pointer(mdp, profile_continue);
1552
1553 // We are making a call. Increment the count.
1554 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1555
1556 // The method data pointer needs to be updated to reflect the new target.
1557 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1558 bind(profile_continue);
1559 }
1560 }
1561
1562
1563 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1564 if (ProfileInterpreter) {
1565 Label profile_continue;
1566
1567 // If no method data exists, go to profile_continue.
1568 test_method_data_pointer(mdp, profile_continue);
1569
1570 // We are making a call. Increment the count.
1571 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1572
1573 // The method data pointer needs to be updated to reflect the new target.
1574 update_mdp_by_constant(mdp,
1575 in_bytes(VirtualCallData::
1576 virtual_call_data_size()));
1577 bind(profile_continue);
1578 }
1579 }
1580
1581
1582 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1583 Register mdp,
1584 Register reg2,
1585 bool receiver_can_be_null) {
1586 if (ProfileInterpreter) {
1587 Label profile_continue;
1588
1589 // If no method data exists, go to profile_continue.
1590 test_method_data_pointer(mdp, profile_continue);
1591
1592 Label skip_receiver_profile;
1593 if (receiver_can_be_null) {
1594 Label not_null;
1595 testptr(receiver, receiver);
1596 jccb(Assembler::notZero, not_null);
1597 // We are making a call. Increment the count for null receiver.
1598 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1599 jmp(skip_receiver_profile);
1600 bind(not_null);
1601 }
1602
1603 // Record the receiver type.
1604 record_klass_in_profile(receiver, mdp, reg2, true);
1605 bind(skip_receiver_profile);
1606
1607 // The method data pointer needs to be updated to reflect the new target.
1608 #if INCLUDE_JVMCI
1609 if (MethodProfileWidth == 0) {
1610 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1611 }
1612 #else // INCLUDE_JVMCI
1613 update_mdp_by_constant(mdp,
1614 in_bytes(VirtualCallData::
1615 virtual_call_data_size()));
1616 #endif // INCLUDE_JVMCI
1617 bind(profile_continue);
1618 }
1619 }
1620
1621 #if INCLUDE_JVMCI
1622 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1623 assert_different_registers(method, mdp, reg2);
1624 if (ProfileInterpreter && MethodProfileWidth > 0) {
1625 Label profile_continue;
1626
1627 // If no method data exists, go to profile_continue.
1628 test_method_data_pointer(mdp, profile_continue);
1629
1630 Label done;
1631 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1632 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1633 bind(done);
1634
1635 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1636 bind(profile_continue);
1637 }
1638 }
1639 #endif // INCLUDE_JVMCI
1640
1641 // This routine creates a state machine for updating the multi-row
1642 // type profile at a virtual call site (or other type-sensitive bytecode).
1643 // The machine visits each row (of receiver/count) until the receiver type
1644 // is found, or until it runs out of rows. At the same time, it remembers
1645 // the location of the first empty row. (An empty row records null for its
1646 // receiver, and can be allocated for a newly-observed receiver type.)
1647 // Because there are two degrees of freedom in the state, a simple linear
1648 // search will not work; it must be a decision tree. Hence this helper
1649 // function is recursive, to generate the required tree structured code.
1650 // It's the interpreter, so we are trading off code space for speed.
1651 // See below for example code.
1652 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1653 Register receiver, Register mdp,
1654 Register reg2, int start_row,
1655 Label& done, bool is_virtual_call) {
1656 if (TypeProfileWidth == 0) {
1657 if (is_virtual_call) {
1658 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1659 }
1660 #if INCLUDE_JVMCI
1661 else if (EnableJVMCI) {
1662 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1663 }
1664 #endif // INCLUDE_JVMCI
1665 } else {
1666 int non_profiled_offset = -1;
1667 if (is_virtual_call) {
1668 non_profiled_offset = in_bytes(CounterData::count_offset());
1669 }
1670 #if INCLUDE_JVMCI
1671 else if (EnableJVMCI) {
1672 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1673 }
1674 #endif // INCLUDE_JVMCI
1675
1676 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1677 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1678 }
1679 }
1680
1681 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1682 Register reg2, int start_row, Label& done, int total_rows,
1683 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1684 int non_profiled_offset) {
1685 int last_row = total_rows - 1;
1686 assert(start_row <= last_row, "must be work left to do");
1687 // Test this row for both the item and for null.
1688 // Take any of three different outcomes:
1689 // 1. found item => increment count and goto done
1690 // 2. found null => keep looking for case 1, maybe allocate this cell
1691 // 3. found something else => keep looking for cases 1 and 2
1692 // Case 3 is handled by a recursive call.
1693 for (int row = start_row; row <= last_row; row++) {
1694 Label next_test;
1695 bool test_for_null_also = (row == start_row);
1696
1697 // See if the item is item[n].
1698 int item_offset = in_bytes(item_offset_fn(row));
1699 test_mdp_data_at(mdp, item_offset, item,
1700 (test_for_null_also ? reg2 : noreg),
1701 next_test);
1702 // (Reg2 now contains the item from the CallData.)
1703
1704 // The item is item[n]. Increment count[n].
1705 int count_offset = in_bytes(item_count_offset_fn(row));
1706 increment_mdp_data_at(mdp, count_offset);
1707 jmp(done);
1708 bind(next_test);
1709
1710 if (test_for_null_also) {
1711 Label found_null;
1712 // Failed the equality check on item[n]... Test for null.
1713 testptr(reg2, reg2);
1714 if (start_row == last_row) {
1715 // The only thing left to do is handle the null case.
1716 if (non_profiled_offset >= 0) {
1717 jccb(Assembler::zero, found_null);
1718 // Item did not match any saved item and there is no empty row for it.
1719 // Increment total counter to indicate polymorphic case.
1720 increment_mdp_data_at(mdp, non_profiled_offset);
1721 jmp(done);
1722 bind(found_null);
1723 } else {
1724 jcc(Assembler::notZero, done);
1725 }
1726 break;
1727 }
1728 // Since null is rare, make it be the branch-taken case.
1729 jcc(Assembler::zero, found_null);
1730
1731 // Put all the "Case 3" tests here.
1732 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1733 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1734
1735 // Found a null. Keep searching for a matching item,
1736 // but remember that this is an empty (unused) slot.
1737 bind(found_null);
1738 }
1739 }
1740
1741 // In the fall-through case, we found no matching item, but we
1742 // observed the item[start_row] is NULL.
1743
1744 // Fill in the item field and increment the count.
1745 int item_offset = in_bytes(item_offset_fn(start_row));
1746 set_mdp_data_at(mdp, item_offset, item);
1747 int count_offset = in_bytes(item_count_offset_fn(start_row));
1748 movl(reg2, DataLayout::counter_increment);
1749 set_mdp_data_at(mdp, count_offset, reg2);
1750 if (start_row > 0) {
1751 jmp(done);
1752 }
1753 }
1754
1755 // Example state machine code for three profile rows:
1756 // // main copy of decision tree, rooted at row[1]
1757 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1758 // if (row[0].rec != NULL) {
1759 // // inner copy of decision tree, rooted at row[1]
1760 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1761 // if (row[1].rec != NULL) {
1762 // // degenerate decision tree, rooted at row[2]
1763 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1764 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1765 // row[2].init(rec); goto done;
1766 // } else {
1767 // // remember row[1] is empty
1768 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1769 // row[1].init(rec); goto done;
1770 // }
1771 // } else {
1772 // // remember row[0] is empty
1773 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1774 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1775 // row[0].init(rec); goto done;
1776 // }
1777 // done:
1778
1779 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1780 Register mdp, Register reg2,
1781 bool is_virtual_call) {
1782 assert(ProfileInterpreter, "must be profiling");
1783 Label done;
1784
1785 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1786
1787 bind (done);
1788 }
1789
1790 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1791 Register mdp) {
1792 if (ProfileInterpreter) {
1793 Label profile_continue;
1794 uint row;
1795
1796 // If no method data exists, go to profile_continue.
1797 test_method_data_pointer(mdp, profile_continue);
1798
1799 // Update the total ret count.
1800 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1801
1802 for (row = 0; row < RetData::row_limit(); row++) {
1803 Label next_test;
1804
1805 // See if return_bci is equal to bci[n]:
1806 test_mdp_data_at(mdp,
1807 in_bytes(RetData::bci_offset(row)),
1808 return_bci, noreg,
1809 next_test);
1810
1811 // return_bci is equal to bci[n]. Increment the count.
1812 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1813
1814 // The method data pointer needs to be updated to reflect the new target.
1815 update_mdp_by_offset(mdp,
1816 in_bytes(RetData::bci_displacement_offset(row)));
1817 jmp(profile_continue);
1818 bind(next_test);
1819 }
1820
1821 update_mdp_for_ret(return_bci);
1822
1823 bind(profile_continue);
1824 }
1825 }
1826
1827
1828 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1829 if (ProfileInterpreter) {
1830 Label profile_continue;
1831
1832 // If no method data exists, go to profile_continue.
1833 test_method_data_pointer(mdp, profile_continue);
1834
1835 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1836
1837 // The method data pointer needs to be updated.
1838 int mdp_delta = in_bytes(BitData::bit_data_size());
1839 if (TypeProfileCasts) {
1840 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1841 }
1842 update_mdp_by_constant(mdp, mdp_delta);
1843
1844 bind(profile_continue);
1845 }
1846 }
1847
1848
1849 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1850 if (ProfileInterpreter && TypeProfileCasts) {
1851 Label profile_continue;
1852
1853 // If no method data exists, go to profile_continue.
1854 test_method_data_pointer(mdp, profile_continue);
1855
1856 int count_offset = in_bytes(CounterData::count_offset());
1857 // Back up the address, since we have already bumped the mdp.
1858 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1859
1860 // *Decrement* the counter. We expect to see zero or small negatives.
1861 increment_mdp_data_at(mdp, count_offset, true);
1862
1863 bind (profile_continue);
1864 }
1865 }
1866
1867
1868 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1869 if (ProfileInterpreter) {
1870 Label profile_continue;
1871
1872 // If no method data exists, go to profile_continue.
1873 test_method_data_pointer(mdp, profile_continue);
1874
1875 // The method data pointer needs to be updated.
1876 int mdp_delta = in_bytes(BitData::bit_data_size());
1877 if (TypeProfileCasts) {
1878 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1879
1880 // Record the object type.
1881 record_klass_in_profile(klass, mdp, reg2, false);
1882 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1883 NOT_LP64(restore_locals();) // Restore EDI
1884 }
1885 update_mdp_by_constant(mdp, mdp_delta);
1886
1887 bind(profile_continue);
1888 }
1889 }
1890
1891
1892 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1893 if (ProfileInterpreter) {
1894 Label profile_continue;
1895
1896 // If no method data exists, go to profile_continue.
1897 test_method_data_pointer(mdp, profile_continue);
1898
1899 // Update the default case count
1900 increment_mdp_data_at(mdp,
1901 in_bytes(MultiBranchData::default_count_offset()));
1902
1903 // The method data pointer needs to be updated.
1904 update_mdp_by_offset(mdp,
1905 in_bytes(MultiBranchData::
1906 default_displacement_offset()));
1907
1908 bind(profile_continue);
1909 }
1910 }
1911
1912
1913 void InterpreterMacroAssembler::profile_switch_case(Register index,
1914 Register mdp,
1915 Register reg2) {
1916 if (ProfileInterpreter) {
1917 Label profile_continue;
1918
1919 // If no method data exists, go to profile_continue.
1920 test_method_data_pointer(mdp, profile_continue);
1921
1922 // Build the base (index * per_case_size_in_bytes()) +
1923 // case_array_offset_in_bytes()
1924 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1925 imulptr(index, reg2); // XXX l ?
1926 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1927
1928 // Update the case count
1929 increment_mdp_data_at(mdp,
1930 index,
1931 in_bytes(MultiBranchData::relative_count_offset()));
1932
1933 // The method data pointer needs to be updated.
1934 update_mdp_by_offset(mdp,
1935 index,
1936 in_bytes(MultiBranchData::
1937 relative_displacement_offset()));
1938
1939 bind(profile_continue);
1940 }
1941 }
1942
1943
1944
1945 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1946 if (state == atos) {
1947 MacroAssembler::verify_oop(reg);
1948 }
1949 }
1950
1951 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1952 #ifndef _LP64
1953 if ((state == ftos && UseSSE < 1) ||
1954 (state == dtos && UseSSE < 2)) {
1955 MacroAssembler::verify_FPU(stack_depth);
1956 }
1957 #endif
1958 }
1959
1960 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1961 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1962 int increment, Address mask,
1963 Register scratch, bool preloaded,
1964 Condition cond, Label* where) {
1965 if (!preloaded) {
1966 movl(scratch, counter_addr);
1967 }
1968 incrementl(scratch, increment);
1969 movl(counter_addr, scratch);
1970 andl(scratch, mask);
1971 jcc(cond, *where);
1972 }
1973
1974 void InterpreterMacroAssembler::notify_method_entry() {
1975 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1976 // track stack depth. If it is possible to enter interp_only_mode we add
1977 // the code to check if the event should be sent.
1978 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1979 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1980 if (JvmtiExport::can_post_interpreter_events()) {
1981 Label L;
1982 NOT_LP64(get_thread(rthread);)
1983 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1984 testl(rdx, rdx);
1985 jcc(Assembler::zero, L);
1986 call_VM(noreg, CAST_FROM_FN_PTR(address,
1987 InterpreterRuntime::post_method_entry));
1988 bind(L);
1989 }
1990
1991 {
1992 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1993 NOT_LP64(get_thread(rthread);)
1994 get_method(rarg);
1995 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1996 rthread, rarg);
1997 }
1998
1999 // RedefineClasses() tracing support for obsolete method entry
2000 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2001 NOT_LP64(get_thread(rthread);)
2002 get_method(rarg);
2003 call_VM_leaf(
2004 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2005 rthread, rarg);
2006 }
2007 }
2008
2009
2010 void InterpreterMacroAssembler::notify_method_exit(
2011 TosState state, NotifyMethodExitMode mode) {
2012 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2013 // track stack depth. If it is possible to enter interp_only_mode we add
2014 // the code to check if the event should be sent.
2015 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2016 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2017 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2018 Label L;
2019 // Note: frame::interpreter_frame_result has a dependency on how the
2020 // method result is saved across the call to post_method_exit. If this
2021 // is changed then the interpreter_frame_result implementation will
2022 // need to be updated too.
2023
2024 // template interpreter will leave the result on the top of the stack.
2025 push(state);
2026 NOT_LP64(get_thread(rthread);)
2027 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2028 testl(rdx, rdx);
2029 jcc(Assembler::zero, L);
2030 call_VM(noreg,
2031 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2032 bind(L);
2033 pop(state);
2034 }
2035
2036 {
2037 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2038 push(state);
2039 NOT_LP64(get_thread(rthread);)
2040 get_method(rarg);
2041 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2042 rthread, rarg);
2043 pop(state);
2044 }
2045 }