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