1/*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "interp_masm_x86.hpp"
27#include "interpreter/interpreter.hpp"
28#include "interpreter/interpreterRuntime.hpp"
29#include "logging/log.hpp"
30#include "oops/arrayOop.hpp"
31#include "oops/markOop.hpp"
32#include "oops/methodData.hpp"
33#include "oops/method.hpp"
34#include "prims/jvmtiExport.hpp"
35#include "prims/jvmtiThreadState.hpp"
36#include "runtime/basicLock.hpp"
37#include "runtime/biasedLocking.hpp"
38#include "runtime/frame.inline.hpp"
39#include "runtime/safepointMechanism.hpp"
40#include "runtime/sharedRuntime.hpp"
41#include "runtime/thread.inline.hpp"
42
43// Implementation of InterpreterMacroAssembler
44
45void InterpreterMacroAssembler::jump_to_entry(address entry) {
46 assert(entry, "Entry must have been generated by now");
47 jump(RuntimeAddress(entry));
48}
49
50void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
51 Label update, next, none;
52
53 verify_oop(obj);
54
55 testptr(obj, obj);
56 jccb(Assembler::notZero, update);
57 orptr(mdo_addr, TypeEntries::null_seen);
58 jmpb(next);
59
60 bind(update);
61 load_klass(obj, obj);
62
63 xorptr(obj, mdo_addr);
64 testptr(obj, TypeEntries::type_klass_mask);
65 jccb(Assembler::zero, next); // klass seen before, nothing to
66 // do. The unknown bit may have been
67 // set already but no need to check.
68
69 testptr(obj, TypeEntries::type_unknown);
70 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
71
72 cmpptr(mdo_addr, 0);
73 jccb(Assembler::equal, none);
74 cmpptr(mdo_addr, TypeEntries::null_seen);
75 jccb(Assembler::equal, none);
76 // There is a chance that the checks above (re-reading profiling
77 // data from memory) fail if another thread has just set the
78 // profiling to this obj's klass
79 xorptr(obj, mdo_addr);
80 testptr(obj, TypeEntries::type_klass_mask);
81 jccb(Assembler::zero, next);
82
83 // different than before. Cannot keep accurate profile.
84 orptr(mdo_addr, TypeEntries::type_unknown);
85 jmpb(next);
86
87 bind(none);
88 // first time here. Set profile type.
89 movptr(mdo_addr, obj);
90
91 bind(next);
92}
93
94void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
95 if (!ProfileInterpreter) {
96 return;
97 }
98
99 if (MethodData::profile_arguments() || MethodData::profile_return()) {
100 Label profile_continue;
101
102 test_method_data_pointer(mdp, profile_continue);
103
104 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
105
106 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
107 jcc(Assembler::notEqual, profile_continue);
108
109 if (MethodData::profile_arguments()) {
110 Label done;
111 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
112 addptr(mdp, off_to_args);
113
114 for (int i = 0; i < TypeProfileArgsLimit; i++) {
115 if (i > 0 || MethodData::profile_return()) {
116 // If return value type is profiled we may have no argument to profile
117 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
118 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
119 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
120 jcc(Assembler::less, done);
121 }
122 movptr(tmp, Address(callee, Method::const_offset()));
123 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
124 // stack offset o (zero based) from the start of the argument
125 // list, for n arguments translates into offset n - o - 1 from
126 // the end of the argument list
127 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
128 subl(tmp, 1);
129 Address arg_addr = argument_address(tmp);
130 movptr(tmp, arg_addr);
131
132 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
133 profile_obj_type(tmp, mdo_arg_addr);
134
135 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
136 addptr(mdp, to_add);
137 off_to_args += to_add;
138 }
139
140 if (MethodData::profile_return()) {
141 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
142 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
143 }
144
145 bind(done);
146
147 if (MethodData::profile_return()) {
148 // We're right after the type profile for the last
149 // argument. tmp is the number of cells left in the
150 // CallTypeData/VirtualCallTypeData to reach its end. Non null
151 // if there's a return to profile.
152 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
153 shll(tmp, exact_log2(DataLayout::cell_size));
154 addptr(mdp, tmp);
155 }
156 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
157 } else {
158 assert(MethodData::profile_return(), "either profile call args or call ret");
159 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
160 }
161
162 // mdp points right after the end of the
163 // CallTypeData/VirtualCallTypeData, right after the cells for the
164 // return value type if there's one
165
166 bind(profile_continue);
167 }
168}
169
170void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
171 assert_different_registers(mdp, ret, tmp, _bcp_register);
172 if (ProfileInterpreter && MethodData::profile_return()) {
173 Label profile_continue;
174
175 test_method_data_pointer(mdp, profile_continue);
176
177 if (MethodData::profile_return_jsr292_only()) {
178 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2");
179
180 // If we don't profile all invoke bytecodes we must make sure
181 // it's a bytecode we indeed profile. We can't go back to the
182 // begining of the ProfileData we intend to update to check its
183 // type because we're right after it and we don't known its
184 // length
185 Label do_profile;
186 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
187 jcc(Assembler::equal, do_profile);
188 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
189 jcc(Assembler::equal, do_profile);
190 get_method(tmp);
191 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
192 jcc(Assembler::notEqual, profile_continue);
193
194 bind(do_profile);
195 }
196
197 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
198 mov(tmp, ret);
199 profile_obj_type(tmp, mdo_ret_addr);
200
201 bind(profile_continue);
202 }
203}
204
205void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
206 if (ProfileInterpreter && MethodData::profile_parameters()) {
207 Label profile_continue;
208
209 test_method_data_pointer(mdp, profile_continue);
210
211 // Load the offset of the area within the MDO used for
212 // parameters. If it's negative we're not profiling any parameters
213 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
214 testl(tmp1, tmp1);
215 jcc(Assembler::negative, profile_continue);
216
217 // Compute a pointer to the area for parameters from the offset
218 // and move the pointer to the slot for the last
219 // parameters. Collect profiling from last parameter down.
220 // mdo start + parameters offset + array length - 1
221 addptr(mdp, tmp1);
222 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
223 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
224
225 Label loop;
226 bind(loop);
227
228 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
229 int type_base = in_bytes(ParametersTypeData::type_offset(0));
230 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
231 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
232 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
233
234 // load offset on the stack from the slot for this parameter
235 movptr(tmp2, arg_off);
236 negptr(tmp2);
237 // read the parameter from the local area
238 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
239
240 // profile the parameter
241 profile_obj_type(tmp2, arg_type);
242
243 // go to next parameter
244 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
245 jcc(Assembler::positive, loop);
246
247 bind(profile_continue);
248 }
249}
250
251void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
252 int number_of_arguments) {
253 // interpreter specific
254 //
255 // Note: No need to save/restore bcp & locals registers
256 // since these are callee saved registers and no blocking/
257 // GC can happen in leaf calls.
258 // Further Note: DO NOT save/restore bcp/locals. If a caller has
259 // already saved them so that it can use rsi/rdi as temporaries
260 // then a save/restore here will DESTROY the copy the caller
261 // saved! There used to be a save_bcp() that only happened in
262 // the ASSERT path (no restore_bcp). Which caused bizarre failures
263 // when jvm built with ASSERTs.
264#ifdef ASSERT
265 {
266 Label L;
267 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
268 jcc(Assembler::equal, L);
269 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
270 " last_sp != NULL");
271 bind(L);
272 }
273#endif
274 // super call
275 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
276 // interpreter specific
277 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
278 // but since they may not have been saved (and we don't want to
279 // save them here (see note above) the assert is invalid.
280}
281
282void InterpreterMacroAssembler::call_VM_base(Register oop_result,
283 Register java_thread,
284 Register last_java_sp,
285 address entry_point,
286 int number_of_arguments,
287 bool check_exceptions) {
288 // interpreter specific
289 //
290 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
291 // really make a difference for these runtime calls, since they are
292 // slow anyway. Btw., bcp must be saved/restored since it may change
293 // due to GC.
294 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
295 save_bcp();
296#ifdef ASSERT
297 {
298 Label L;
299 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
300 jcc(Assembler::equal, L);
301 stop("InterpreterMacroAssembler::call_VM_base:"
302 " last_sp != NULL");
303 bind(L);
304 }
305#endif /* ASSERT */
306 // super call
307 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
308 entry_point, number_of_arguments,
309 check_exceptions);
310 // interpreter specific
311 restore_bcp();
312 restore_locals();
313}
314
315void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
316 if (JvmtiExport::can_pop_frame()) {
317 Label L;
318 // Initiate popframe handling only if it is not already being
319 // processed. If the flag has the popframe_processing bit set, it
320 // means that this code is called *during* popframe handling - we
321 // don't want to reenter.
322 // This method is only called just after the call into the vm in
323 // call_VM_base, so the arg registers are available.
324 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
325 LP64_ONLY(c_rarg0);
326 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
327 testl(pop_cond, JavaThread::popframe_pending_bit);
328 jcc(Assembler::zero, L);
329 testl(pop_cond, JavaThread::popframe_processing_bit);
330 jcc(Assembler::notZero, L);
331 // Call Interpreter::remove_activation_preserving_args_entry() to get the
332 // address of the same-named entrypoint in the generated interpreter code.
333 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
334 jmp(rax);
335 bind(L);
336 NOT_LP64(get_thread(java_thread);)
337 }
338}
339
340void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
341 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
342 NOT_LP64(get_thread(thread);)
343 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
344 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
345 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
346 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
347#ifdef _LP64
348 switch (state) {
349 case atos: movptr(rax, oop_addr);
350 movptr(oop_addr, (int32_t)NULL_WORD);
351 verify_oop(rax, state); break;
352 case ltos: movptr(rax, val_addr); break;
353 case btos: // fall through
354 case ztos: // fall through
355 case ctos: // fall through
356 case stos: // fall through
357 case itos: movl(rax, val_addr); break;
358 case ftos: load_float(val_addr); break;
359 case dtos: load_double(val_addr); break;
360 case vtos: /* nothing to do */ break;
361 default : ShouldNotReachHere();
362 }
363 // Clean up tos value in the thread object
364 movl(tos_addr, (int) ilgl);
365 movl(val_addr, (int32_t) NULL_WORD);
366#else
367 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
368 + in_ByteSize(wordSize));
369 switch (state) {
370 case atos: movptr(rax, oop_addr);
371 movptr(oop_addr, NULL_WORD);
372 verify_oop(rax, state); break;
373 case ltos:
374 movl(rdx, val_addr1); // fall through
375 case btos: // fall through
376 case ztos: // fall through
377 case ctos: // fall through
378 case stos: // fall through
379 case itos: movl(rax, val_addr); break;
380 case ftos: load_float(val_addr); break;
381 case dtos: load_double(val_addr); break;
382 case vtos: /* nothing to do */ break;
383 default : ShouldNotReachHere();
384 }
385#endif // _LP64
386 // Clean up tos value in the thread object
387 movl(tos_addr, (int32_t) ilgl);
388 movptr(val_addr, NULL_WORD);
389 NOT_LP64(movptr(val_addr1, NULL_WORD);)
390}
391
392
393void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
394 if (JvmtiExport::can_force_early_return()) {
395 Label L;
396 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
397 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
398
399 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
400 testptr(tmp, tmp);
401 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
402
403 // Initiate earlyret handling only if it is not already being processed.
404 // If the flag has the earlyret_processing bit set, it means that this code
405 // is called *during* earlyret handling - we don't want to reenter.
406 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
407 cmpl(tmp, JvmtiThreadState::earlyret_pending);
408 jcc(Assembler::notEqual, L);
409
410 // Call Interpreter::remove_activation_early_entry() to get the address of the
411 // same-named entrypoint in the generated interpreter code.
412 NOT_LP64(get_thread(java_thread);)
413 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
414#ifdef _LP64
415 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
416 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
417#else
418 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
419 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
420#endif // _LP64
421 jmp(rax);
422 bind(L);
423 NOT_LP64(get_thread(java_thread);)
424 }
425}
426
427void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
428 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
429 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
430 bswapl(reg);
431 shrl(reg, 16);
432}
433
434void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
435 int bcp_offset,
436 size_t index_size) {
437 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
438 if (index_size == sizeof(u2)) {
439 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
440 } else if (index_size == sizeof(u4)) {
441 movl(index, Address(_bcp_register, bcp_offset));
442 // Check if the secondary index definition is still ~x, otherwise
443 // we have to change the following assembler code to calculate the
444 // plain index.
445 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
446 notl(index); // convert to plain index
447 } else if (index_size == sizeof(u1)) {
448 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
449 } else {
450 ShouldNotReachHere();
451 }
452}
453
454void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
455 Register index,
456 int bcp_offset,
457 size_t index_size) {
458 assert_different_registers(cache, index);
459 get_cache_index_at_bcp(index, bcp_offset, index_size);
460 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
461 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
462 // convert from field index to ConstantPoolCacheEntry index
463 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
464 shll(index, 2);
465}
466
467void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
468 Register index,
469 Register bytecode,
470 int byte_no,
471 int bcp_offset,
472 size_t index_size) {
473 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
474 // We use a 32-bit load here since the layout of 64-bit words on
475 // little-endian machines allow us that.
476 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
477 const int shift_count = (1 + byte_no) * BitsPerByte;
478 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
479 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
480 "correct shift count");
481 shrl(bytecode, shift_count);
482 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
483 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
484}
485
486void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
487 Register tmp,
488 int bcp_offset,
489 size_t index_size) {
490 assert_different_registers(cache, tmp);
491
492 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
493 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
494 // convert from field index to ConstantPoolCacheEntry index
495 // and from word offset to byte offset
496 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
497 shll(tmp, 2 + LogBytesPerWord);
498 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
499 // skip past the header
500 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
501 addptr(cache, tmp); // construct pointer to cache entry
502}
503
504// Load object from cpool->resolved_references(index)
505void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result,
506 Register index,
507 Register tmp) {
508 assert_different_registers(result, index);
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 resolve_oop_handle(result, tmp);
515 load_heap_oop(result, Address(result, index,
516 UseCompressedOops ? Address::times_4 : Address::times_ptr,
517 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp);
518}
519
520// load cpool->resolved_klass_at(index)
521void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass,
522 Register cpool,
523 Register index) {
524 assert_different_registers(cpool, index);
525
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
532void InterpreterMacroAssembler::load_resolved_method_at_index(int byte_no,
533 Register method,
534 Register cache,
535 Register index) {
536 assert_different_registers(cache, index);
537
538 const int method_offset = in_bytes(
539 ConstantPoolCache::base_offset() +
540 ((byte_no == TemplateTable::f2_byte)
541 ? ConstantPoolCacheEntry::f2_offset()
542 : ConstantPoolCacheEntry::f1_offset()));
543
544 movptr(method, Address(cache, index, Address::times_ptr, method_offset)); // get f1 Method*
545}
546
547// Generate a subtype check: branch to ok_is_subtype if sub_klass is a
548// subtype of super_klass.
549//
550// Args:
551// rax: superklass
552// Rsub_klass: subklass
553//
554// Kills:
555// rcx, rdi
556void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
557 Label& ok_is_subtype) {
558 assert(Rsub_klass != rax, "rax holds superklass");
559 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
560 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
561 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
562 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
563
564 // Profile the not-null value's klass.
565 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
566
567 // Do the check.
568 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
569
570 // Profile the failure of the check.
571 profile_typecheck_failed(rcx); // blows rcx
572}
573
574
575#ifndef _LP64
576void InterpreterMacroAssembler::f2ieee() {
577 if (IEEEPrecision) {
578 fstp_s(Address(rsp, 0));
579 fld_s(Address(rsp, 0));
580 }
581}
582
583
584void InterpreterMacroAssembler::d2ieee() {
585 if (IEEEPrecision) {
586 fstp_d(Address(rsp, 0));
587 fld_d(Address(rsp, 0));
588 }
589}
590#endif // _LP64
591
592// Java Expression Stack
593
594void InterpreterMacroAssembler::pop_ptr(Register r) {
595 pop(r);
596}
597
598void InterpreterMacroAssembler::push_ptr(Register r) {
599 push(r);
600}
601
602void InterpreterMacroAssembler::push_i(Register r) {
603 push(r);
604}
605
606void InterpreterMacroAssembler::push_f(XMMRegister r) {
607 subptr(rsp, wordSize);
608 movflt(Address(rsp, 0), r);
609}
610
611void InterpreterMacroAssembler::pop_f(XMMRegister r) {
612 movflt(r, Address(rsp, 0));
613 addptr(rsp, wordSize);
614}
615
616void InterpreterMacroAssembler::push_d(XMMRegister r) {
617 subptr(rsp, 2 * wordSize);
618 movdbl(Address(rsp, 0), r);
619}
620
621void InterpreterMacroAssembler::pop_d(XMMRegister r) {
622 movdbl(r, Address(rsp, 0));
623 addptr(rsp, 2 * Interpreter::stackElementSize);
624}
625
626#ifdef _LP64
627void InterpreterMacroAssembler::pop_i(Register r) {
628 // XXX can't use pop currently, upper half non clean
629 movl(r, Address(rsp, 0));
630 addptr(rsp, wordSize);
631}
632
633void InterpreterMacroAssembler::pop_l(Register r) {
634 movq(r, Address(rsp, 0));
635 addptr(rsp, 2 * Interpreter::stackElementSize);
636}
637
638void InterpreterMacroAssembler::push_l(Register r) {
639 subptr(rsp, 2 * wordSize);
640 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r );
641 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD );
642}
643
644void InterpreterMacroAssembler::pop(TosState state) {
645 switch (state) {
646 case atos: pop_ptr(); break;
647 case btos:
648 case ztos:
649 case ctos:
650 case stos:
651 case itos: pop_i(); break;
652 case ltos: pop_l(); break;
653 case ftos: pop_f(xmm0); break;
654 case dtos: pop_d(xmm0); break;
655 case vtos: /* nothing to do */ break;
656 default: ShouldNotReachHere();
657 }
658 verify_oop(rax, state);
659}
660
661void InterpreterMacroAssembler::push(TosState state) {
662 verify_oop(rax, state);
663 switch (state) {
664 case atos: push_ptr(); break;
665 case btos:
666 case ztos:
667 case ctos:
668 case stos:
669 case itos: push_i(); break;
670 case ltos: push_l(); break;
671 case ftos: push_f(xmm0); break;
672 case dtos: push_d(xmm0); break;
673 case vtos: /* nothing to do */ break;
674 default : ShouldNotReachHere();
675 }
676}
677#else
678void InterpreterMacroAssembler::pop_i(Register r) {
679 pop(r);
680}
681
682void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
683 pop(lo);
684 pop(hi);
685}
686
687void InterpreterMacroAssembler::pop_f() {
688 fld_s(Address(rsp, 0));
689 addptr(rsp, 1 * wordSize);
690}
691
692void InterpreterMacroAssembler::pop_d() {
693 fld_d(Address(rsp, 0));
694 addptr(rsp, 2 * wordSize);
695}
696
697
698void InterpreterMacroAssembler::pop(TosState state) {
699 switch (state) {
700 case atos: pop_ptr(rax); break;
701 case btos: // fall through
702 case ztos: // fall through
703 case ctos: // fall through
704 case stos: // fall through
705 case itos: pop_i(rax); break;
706 case ltos: pop_l(rax, rdx); break;
707 case ftos:
708 if (UseSSE >= 1) {
709 pop_f(xmm0);
710 } else {
711 pop_f();
712 }
713 break;
714 case dtos:
715 if (UseSSE >= 2) {
716 pop_d(xmm0);
717 } else {
718 pop_d();
719 }
720 break;
721 case vtos: /* nothing to do */ break;
722 default : ShouldNotReachHere();
723 }
724 verify_oop(rax, state);
725}
726
727
728void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
729 push(hi);
730 push(lo);
731}
732
733void InterpreterMacroAssembler::push_f() {
734 // Do not schedule for no AGI! Never write beyond rsp!
735 subptr(rsp, 1 * wordSize);
736 fstp_s(Address(rsp, 0));
737}
738
739void InterpreterMacroAssembler::push_d() {
740 // Do not schedule for no AGI! Never write beyond rsp!
741 subptr(rsp, 2 * wordSize);
742 fstp_d(Address(rsp, 0));
743}
744
745
746void InterpreterMacroAssembler::push(TosState state) {
747 verify_oop(rax, state);
748 switch (state) {
749 case atos: push_ptr(rax); break;
750 case btos: // fall through
751 case ztos: // fall through
752 case ctos: // fall through
753 case stos: // fall through
754 case itos: push_i(rax); break;
755 case ltos: push_l(rax, rdx); break;
756 case ftos:
757 if (UseSSE >= 1) {
758 push_f(xmm0);
759 } else {
760 push_f();
761 }
762 break;
763 case dtos:
764 if (UseSSE >= 2) {
765 push_d(xmm0);
766 } else {
767 push_d();
768 }
769 break;
770 case vtos: /* nothing to do */ break;
771 default : ShouldNotReachHere();
772 }
773}
774#endif // _LP64
775
776
777// Helpers for swap and dup
778void InterpreterMacroAssembler::load_ptr(int n, Register val) {
779 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
780}
781
782void InterpreterMacroAssembler::store_ptr(int n, Register val) {
783 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
784}
785
786
787void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
788 // set sender sp
789 lea(_bcp_register, Address(rsp, wordSize));
790 // record last_sp
791 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
792}
793
794
795// Jump to from_interpreted entry of a call unless single stepping is possible
796// in this thread in which case we must call the i2i entry
797void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
798 prepare_to_jump_from_interpreted();
799
800 if (JvmtiExport::can_post_interpreter_events()) {
801 Label run_compiled_code;
802 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
803 // compiled code in threads for which the event is enabled. Check here for
804 // interp_only_mode if these events CAN be enabled.
805 // interp_only is an int, on little endian it is sufficient to test the byte only
806 // Is a cmpl faster?
807 LP64_ONLY(temp = r15_thread;)
808 NOT_LP64(get_thread(temp);)
809 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
810 jccb(Assembler::zero, run_compiled_code);
811 jmp(Address(method, Method::interpreter_entry_offset()));
812 bind(run_compiled_code);
813 }
814
815 jmp(Address(method, Method::from_interpreted_offset()));
816}
817
818// The following two routines provide a hook so that an implementation
819// can schedule the dispatch in two parts. x86 does not do this.
820void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
821 // Nothing x86 specific to be done here
822}
823
824void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
825 dispatch_next(state, step);
826}
827
828void InterpreterMacroAssembler::dispatch_base(TosState state,
829 address* table,
830 bool verifyoop,
831 bool generate_poll) {
832 verify_FPU(1, state);
833 if (VerifyActivationFrameSize) {
834 Label L;
835 mov(rcx, rbp);
836 subptr(rcx, rsp);
837 int32_t min_frame_size =
838 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
839 wordSize;
840 cmpptr(rcx, (int32_t)min_frame_size);
841 jcc(Assembler::greaterEqual, L);
842 stop("broken stack frame");
843 bind(L);
844 }
845 if (verifyoop) {
846 verify_oop(rax, state);
847 }
848
849 address* const safepoint_table = Interpreter::safept_table(state);
850#ifdef _LP64
851 Label no_safepoint, dispatch;
852 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
853 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
854 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
855
856 jccb(Assembler::zero, no_safepoint);
857 lea(rscratch1, ExternalAddress((address)safepoint_table));
858 jmpb(dispatch);
859 }
860
861 bind(no_safepoint);
862 lea(rscratch1, ExternalAddress((address)table));
863 bind(dispatch);
864 jmp(Address(rscratch1, rbx, Address::times_8));
865
866#else
867 Address index(noreg, rbx, Address::times_ptr);
868 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) {
869 NOT_PRODUCT(block_comment("Thread-local Safepoint poll"));
870 Label no_safepoint;
871 const Register thread = rcx;
872 get_thread(thread);
873 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit());
874
875 jccb(Assembler::zero, no_safepoint);
876 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index);
877 jump(dispatch_addr);
878 bind(no_safepoint);
879 }
880
881 {
882 ArrayAddress dispatch_addr(ExternalAddress((address)table), index);
883 jump(dispatch_addr);
884 }
885#endif // _LP64
886}
887
888void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) {
889 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
890}
891
892void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
893 dispatch_base(state, Interpreter::normal_table(state));
894}
895
896void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
897 dispatch_base(state, Interpreter::normal_table(state), false);
898}
899
900
901void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) {
902 // load next bytecode (load before advancing _bcp_register to prevent AGI)
903 load_unsigned_byte(rbx, Address(_bcp_register, step));
904 // advance _bcp_register
905 increment(_bcp_register, step);
906 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll);
907}
908
909void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
910 // load current bytecode
911 load_unsigned_byte(rbx, Address(_bcp_register, 0));
912 dispatch_base(state, table);
913}
914
915void InterpreterMacroAssembler::narrow(Register result) {
916
917 // Get method->_constMethod->_result_type
918 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
919 movptr(rcx, Address(rcx, Method::const_offset()));
920 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
921
922 Label done, notBool, notByte, notChar;
923
924 // common case first
925 cmpl(rcx, T_INT);
926 jcc(Assembler::equal, done);
927
928 // mask integer result to narrower return type.
929 cmpl(rcx, T_BOOLEAN);
930 jcc(Assembler::notEqual, notBool);
931 andl(result, 0x1);
932 jmp(done);
933
934 bind(notBool);
935 cmpl(rcx, T_BYTE);
936 jcc(Assembler::notEqual, notByte);
937 LP64_ONLY(movsbl(result, result);)
938 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
939 NOT_LP64(sarl(result, 24);) // and sign-extend byte
940 jmp(done);
941
942 bind(notByte);
943 cmpl(rcx, T_CHAR);
944 jcc(Assembler::notEqual, notChar);
945 LP64_ONLY(movzwl(result, result);)
946 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
947 jmp(done);
948
949 bind(notChar);
950 // cmpl(rcx, T_SHORT); // all that's left
951 // jcc(Assembler::notEqual, done);
952 LP64_ONLY(movswl(result, result);)
953 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
954 NOT_LP64(sarl(result, 16);) // and sign-extend short
955
956 // Nothing to do for T_INT
957 bind(done);
958}
959
960// remove activation
961//
962// Unlock the receiver if this is a synchronized method.
963// Unlock any Java monitors from syncronized blocks.
964// Remove the activation from the stack.
965//
966// If there are locked Java monitors
967// If throw_monitor_exception
968// throws IllegalMonitorStateException
969// Else if install_monitor_exception
970// installs IllegalMonitorStateException
971// Else
972// no error processing
973void InterpreterMacroAssembler::remove_activation(
974 TosState state,
975 Register ret_addr,
976 bool throw_monitor_exception,
977 bool install_monitor_exception,
978 bool notify_jvmdi) {
979 // Note: Registers rdx xmm0 may be in use for the
980 // result check if synchronized method
981 Label unlocked, unlock, no_unlock;
982
983 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
984 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
985 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
986 // monitor pointers need different register
987 // because rdx may have the result in it
988 NOT_LP64(get_thread(rcx);)
989
990 // get the value of _do_not_unlock_if_synchronized into rdx
991 const Address do_not_unlock_if_synchronized(rthread,
992 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
993 movbool(rbx, do_not_unlock_if_synchronized);
994 movbool(do_not_unlock_if_synchronized, false); // reset the flag
995
996 // get method access flags
997 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
998 movl(rcx, Address(rcx, Method::access_flags_offset()));
999 testl(rcx, JVM_ACC_SYNCHRONIZED);
1000 jcc(Assembler::zero, unlocked);
1001
1002 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
1003 // is set.
1004 testbool(rbx);
1005 jcc(Assembler::notZero, no_unlock);
1006
1007 // unlock monitor
1008 push(state); // save result
1009
1010 // BasicObjectLock will be first in list, since this is a
1011 // synchronized method. However, need to check that the object has
1012 // not been unlocked by an explicit monitorexit bytecode.
1013 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
1014 wordSize - (int) sizeof(BasicObjectLock));
1015 // We use c_rarg1/rdx so that if we go slow path it will be the correct
1016 // register for unlock_object to pass to VM directly
1017 lea(robj, monitor); // address of first monitor
1018
1019 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
1020 testptr(rax, rax);
1021 jcc(Assembler::notZero, unlock);
1022
1023 pop(state);
1024 if (throw_monitor_exception) {
1025 // Entry already unlocked, need to throw exception
1026 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
1027 call_VM(noreg, CAST_FROM_FN_PTR(address,
1028 InterpreterRuntime::throw_illegal_monitor_state_exception));
1029 should_not_reach_here();
1030 } else {
1031 // Monitor already unlocked during a stack unroll. If requested,
1032 // install an illegal_monitor_state_exception. Continue with
1033 // stack unrolling.
1034 if (install_monitor_exception) {
1035 NOT_LP64(empty_FPU_stack();)
1036 call_VM(noreg, CAST_FROM_FN_PTR(address,
1037 InterpreterRuntime::new_illegal_monitor_state_exception));
1038 }
1039 jmp(unlocked);
1040 }
1041
1042 bind(unlock);
1043 unlock_object(robj);
1044 pop(state);
1045
1046 // Check that for block-structured locking (i.e., that all locked
1047 // objects has been unlocked)
1048 bind(unlocked);
1049
1050 // rax, rdx: Might contain return value
1051
1052 // Check that all monitors are unlocked
1053 {
1054 Label loop, exception, entry, restart;
1055 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
1056 const Address monitor_block_top(
1057 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
1058 const Address monitor_block_bot(
1059 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
1060
1061 bind(restart);
1062 // We use c_rarg1 so that if we go slow path it will be the correct
1063 // register for unlock_object to pass to VM directly
1064 movptr(rmon, monitor_block_top); // points to current entry, starting
1065 // with top-most entry
1066 lea(rbx, monitor_block_bot); // points to word before bottom of
1067 // monitor block
1068 jmp(entry);
1069
1070 // Entry already locked, need to throw exception
1071 bind(exception);
1072
1073 if (throw_monitor_exception) {
1074 // Throw exception
1075 NOT_LP64(empty_FPU_stack();)
1076 MacroAssembler::call_VM(noreg,
1077 CAST_FROM_FN_PTR(address, InterpreterRuntime::
1078 throw_illegal_monitor_state_exception));
1079 should_not_reach_here();
1080 } else {
1081 // Stack unrolling. Unlock object and install illegal_monitor_exception.
1082 // Unlock does not block, so don't have to worry about the frame.
1083 // We don't have to preserve c_rarg1 since we are going to throw an exception.
1084
1085 push(state);
1086 mov(robj, rmon); // nop if robj and rmon are the same
1087 unlock_object(robj);
1088 pop(state);
1089
1090 if (install_monitor_exception) {
1091 NOT_LP64(empty_FPU_stack();)
1092 call_VM(noreg, CAST_FROM_FN_PTR(address,
1093 InterpreterRuntime::
1094 new_illegal_monitor_state_exception));
1095 }
1096
1097 jmp(restart);
1098 }
1099
1100 bind(loop);
1101 // check if current entry is used
1102 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
1103 jcc(Assembler::notEqual, exception);
1104
1105 addptr(rmon, entry_size); // otherwise advance to next entry
1106 bind(entry);
1107 cmpptr(rmon, rbx); // check if bottom reached
1108 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1109 }
1110
1111 bind(no_unlock);
1112
1113 // jvmti support
1114 if (notify_jvmdi) {
1115 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1116 } else {
1117 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1118 }
1119
1120 // remove activation
1121 // get sender sp
1122 movptr(rbx,
1123 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1124 if (StackReservedPages > 0) {
1125 // testing if reserved zone needs to be re-enabled
1126 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1127 Label no_reserved_zone_enabling;
1128
1129 NOT_LP64(get_thread(rthread);)
1130
1131 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled);
1132 jcc(Assembler::equal, no_reserved_zone_enabling);
1133
1134 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset()));
1135 jcc(Assembler::lessEqual, no_reserved_zone_enabling);
1136
1137 call_VM_leaf(
1138 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread);
1139 call_VM(noreg, CAST_FROM_FN_PTR(address,
1140 InterpreterRuntime::throw_delayed_StackOverflowError));
1141 should_not_reach_here();
1142
1143 bind(no_reserved_zone_enabling);
1144 }
1145 leave(); // remove frame anchor
1146 pop(ret_addr); // get return address
1147 mov(rsp, rbx); // set sp to sender sp
1148}
1149
1150void InterpreterMacroAssembler::get_method_counters(Register method,
1151 Register mcs, Label& skip) {
1152 Label has_counters;
1153 movptr(mcs, Address(method, Method::method_counters_offset()));
1154 testptr(mcs, mcs);
1155 jcc(Assembler::notZero, has_counters);
1156 call_VM(noreg, CAST_FROM_FN_PTR(address,
1157 InterpreterRuntime::build_method_counters), method);
1158 movptr(mcs, Address(method,Method::method_counters_offset()));
1159 testptr(mcs, mcs);
1160 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1161 bind(has_counters);
1162}
1163
1164
1165// Lock object
1166//
1167// Args:
1168// rdx, c_rarg1: BasicObjectLock to be used for locking
1169//
1170// Kills:
1171// rax, rbx
1172void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1173 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1174 "The argument is only for looks. It must be c_rarg1");
1175
1176 if (UseHeavyMonitors) {
1177 call_VM(noreg,
1178 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1179 lock_reg);
1180 } else {
1181 Label done;
1182
1183 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1184 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1185 // problematic case where tmp_reg = no_reg.
1186 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1187
1188 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1189 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1190 const int mark_offset = lock_offset +
1191 BasicLock::displaced_header_offset_in_bytes();
1192
1193 Label slow_case;
1194
1195 // Load object pointer into obj_reg
1196 movptr(obj_reg, Address(lock_reg, obj_offset));
1197
1198 if (UseBiasedLocking) {
1199 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1200 }
1201
1202 // Load immediate 1 into swap_reg %rax
1203 movl(swap_reg, (int32_t)1);
1204
1205 // Load (object->mark() | 1) into swap_reg %rax
1206 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1207
1208 // Save (object->mark() | 1) into BasicLock's displaced header
1209 movptr(Address(lock_reg, mark_offset), swap_reg);
1210
1211 assert(lock_offset == 0,
1212 "displaced header must be first word in BasicObjectLock");
1213
1214 lock();
1215 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1216 if (PrintBiasedLockingStatistics) {
1217 cond_inc32(Assembler::zero,
1218 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1219 }
1220 jcc(Assembler::zero, done);
1221
1222 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1223
1224 // Test if the oopMark is an obvious stack pointer, i.e.,
1225 // 1) (mark & zero_bits) == 0, and
1226 // 2) rsp <= mark < mark + os::pagesize()
1227 //
1228 // These 3 tests can be done by evaluating the following
1229 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1230 // assuming both stack pointer and pagesize have their
1231 // least significant bits clear.
1232 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1233 subptr(swap_reg, rsp);
1234 andptr(swap_reg, zero_bits - os::vm_page_size());
1235
1236 // Save the test result, for recursive case, the result is zero
1237 movptr(Address(lock_reg, mark_offset), swap_reg);
1238
1239 if (PrintBiasedLockingStatistics) {
1240 cond_inc32(Assembler::zero,
1241 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1242 }
1243 jcc(Assembler::zero, done);
1244
1245 bind(slow_case);
1246
1247 // Call the runtime routine for slow case
1248 call_VM(noreg,
1249 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1250 lock_reg);
1251
1252 bind(done);
1253 }
1254}
1255
1256
1257// Unlocks an object. Used in monitorexit bytecode and
1258// remove_activation. Throws an IllegalMonitorException if object is
1259// not locked by current thread.
1260//
1261// Args:
1262// rdx, c_rarg1: BasicObjectLock for lock
1263//
1264// Kills:
1265// rax
1266// c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1267// rscratch1 (scratch reg)
1268// rax, rbx, rcx, rdx
1269void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1270 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1271 "The argument is only for looks. It must be c_rarg1");
1272
1273 if (UseHeavyMonitors) {
1274 call_VM(noreg,
1275 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1276 lock_reg);
1277 } else {
1278 Label done;
1279
1280 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1281 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1282 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1283
1284 save_bcp(); // Save in case of exception
1285
1286 // Convert from BasicObjectLock structure to object and BasicLock
1287 // structure Store the BasicLock address into %rax
1288 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1289
1290 // Load oop into obj_reg(%c_rarg3)
1291 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1292
1293 // Free entry
1294 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1295
1296 if (UseBiasedLocking) {
1297 biased_locking_exit(obj_reg, header_reg, done);
1298 }
1299
1300 // Load the old header from BasicLock structure
1301 movptr(header_reg, Address(swap_reg,
1302 BasicLock::displaced_header_offset_in_bytes()));
1303
1304 // Test for recursion
1305 testptr(header_reg, header_reg);
1306
1307 // zero for recursive case
1308 jcc(Assembler::zero, done);
1309
1310 // Atomic swap back the old header
1311 lock();
1312 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
1313
1314 // zero for simple unlock of a stack-lock case
1315 jcc(Assembler::zero, done);
1316
1317 // Call the runtime routine for slow case.
1318 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1319 obj_reg); // restore obj
1320 call_VM(noreg,
1321 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1322 lock_reg);
1323
1324 bind(done);
1325
1326 restore_bcp();
1327 }
1328}
1329
1330void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1331 Label& zero_continue) {
1332 assert(ProfileInterpreter, "must be profiling interpreter");
1333 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1334 testptr(mdp, mdp);
1335 jcc(Assembler::zero, zero_continue);
1336}
1337
1338
1339// Set the method data pointer for the current bcp.
1340void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1341 assert(ProfileInterpreter, "must be profiling interpreter");
1342 Label set_mdp;
1343 push(rax);
1344 push(rbx);
1345
1346 get_method(rbx);
1347 // Test MDO to avoid the call if it is NULL.
1348 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1349 testptr(rax, rax);
1350 jcc(Assembler::zero, set_mdp);
1351 // rbx: method
1352 // _bcp_register: bcp
1353 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1354 // rax: mdi
1355 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1356 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1357 addptr(rbx, in_bytes(MethodData::data_offset()));
1358 addptr(rax, rbx);
1359 bind(set_mdp);
1360 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1361 pop(rbx);
1362 pop(rax);
1363}
1364
1365void InterpreterMacroAssembler::verify_method_data_pointer() {
1366 assert(ProfileInterpreter, "must be profiling interpreter");
1367#ifdef ASSERT
1368 Label verify_continue;
1369 push(rax);
1370 push(rbx);
1371 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1372 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1373 push(arg3_reg);
1374 push(arg2_reg);
1375 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1376 get_method(rbx);
1377
1378 // If the mdp is valid, it will point to a DataLayout header which is
1379 // consistent with the bcp. The converse is highly probable also.
1380 load_unsigned_short(arg2_reg,
1381 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1382 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1383 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1384 cmpptr(arg2_reg, _bcp_register);
1385 jcc(Assembler::equal, verify_continue);
1386 // rbx: method
1387 // _bcp_register: bcp
1388 // c_rarg3: mdp
1389 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1390 rbx, _bcp_register, arg3_reg);
1391 bind(verify_continue);
1392 pop(arg2_reg);
1393 pop(arg3_reg);
1394 pop(rbx);
1395 pop(rax);
1396#endif // ASSERT
1397}
1398
1399
1400void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1401 int constant,
1402 Register value) {
1403 assert(ProfileInterpreter, "must be profiling interpreter");
1404 Address data(mdp_in, constant);
1405 movptr(data, value);
1406}
1407
1408
1409void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1410 int constant,
1411 bool decrement) {
1412 // Counter address
1413 Address data(mdp_in, constant);
1414
1415 increment_mdp_data_at(data, decrement);
1416}
1417
1418void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1419 bool decrement) {
1420 assert(ProfileInterpreter, "must be profiling interpreter");
1421 // %%% this does 64bit counters at best it is wasting space
1422 // at worst it is a rare bug when counters overflow
1423
1424 if (decrement) {
1425 // Decrement the register. Set condition codes.
1426 addptr(data, (int32_t) -DataLayout::counter_increment);
1427 // If the decrement causes the counter to overflow, stay negative
1428 Label L;
1429 jcc(Assembler::negative, L);
1430 addptr(data, (int32_t) DataLayout::counter_increment);
1431 bind(L);
1432 } else {
1433 assert(DataLayout::counter_increment == 1,
1434 "flow-free idiom only works with 1");
1435 // Increment the register. Set carry flag.
1436 addptr(data, DataLayout::counter_increment);
1437 // If the increment causes the counter to overflow, pull back by 1.
1438 sbbptr(data, (int32_t)0);
1439 }
1440}
1441
1442
1443void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1444 Register reg,
1445 int constant,
1446 bool decrement) {
1447 Address data(mdp_in, reg, Address::times_1, constant);
1448
1449 increment_mdp_data_at(data, decrement);
1450}
1451
1452void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1453 int flag_byte_constant) {
1454 assert(ProfileInterpreter, "must be profiling interpreter");
1455 int header_offset = in_bytes(DataLayout::flags_offset());
1456 int header_bits = flag_byte_constant;
1457 // Set the flag
1458 orb(Address(mdp_in, header_offset), header_bits);
1459}
1460
1461
1462
1463void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1464 int offset,
1465 Register value,
1466 Register test_value_out,
1467 Label& not_equal_continue) {
1468 assert(ProfileInterpreter, "must be profiling interpreter");
1469 if (test_value_out == noreg) {
1470 cmpptr(value, Address(mdp_in, offset));
1471 } else {
1472 // Put the test value into a register, so caller can use it:
1473 movptr(test_value_out, Address(mdp_in, offset));
1474 cmpptr(test_value_out, value);
1475 }
1476 jcc(Assembler::notEqual, not_equal_continue);
1477}
1478
1479
1480void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1481 int offset_of_disp) {
1482 assert(ProfileInterpreter, "must be profiling interpreter");
1483 Address disp_address(mdp_in, offset_of_disp);
1484 addptr(mdp_in, disp_address);
1485 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1486}
1487
1488
1489void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1490 Register reg,
1491 int offset_of_disp) {
1492 assert(ProfileInterpreter, "must be profiling interpreter");
1493 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1494 addptr(mdp_in, disp_address);
1495 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1496}
1497
1498
1499void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1500 int constant) {
1501 assert(ProfileInterpreter, "must be profiling interpreter");
1502 addptr(mdp_in, constant);
1503 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1504}
1505
1506
1507void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1508 assert(ProfileInterpreter, "must be profiling interpreter");
1509 push(return_bci); // save/restore across call_VM
1510 call_VM(noreg,
1511 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1512 return_bci);
1513 pop(return_bci);
1514}
1515
1516
1517void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1518 Register bumped_count) {
1519 if (ProfileInterpreter) {
1520 Label profile_continue;
1521
1522 // If no method data exists, go to profile_continue.
1523 // Otherwise, assign to mdp
1524 test_method_data_pointer(mdp, profile_continue);
1525
1526 // We are taking a branch. Increment the taken count.
1527 // We inline increment_mdp_data_at to return bumped_count in a register
1528 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1529 Address data(mdp, in_bytes(JumpData::taken_offset()));
1530 movptr(bumped_count, data);
1531 assert(DataLayout::counter_increment == 1,
1532 "flow-free idiom only works with 1");
1533 addptr(bumped_count, DataLayout::counter_increment);
1534 sbbptr(bumped_count, 0);
1535 movptr(data, bumped_count); // Store back out
1536
1537 // The method data pointer needs to be updated to reflect the new target.
1538 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1539 bind(profile_continue);
1540 }
1541}
1542
1543
1544void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1545 if (ProfileInterpreter) {
1546 Label profile_continue;
1547
1548 // If no method data exists, go to profile_continue.
1549 test_method_data_pointer(mdp, profile_continue);
1550
1551 // We are taking a branch. Increment the not taken count.
1552 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1553
1554 // The method data pointer needs to be updated to correspond to
1555 // the next bytecode
1556 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1557 bind(profile_continue);
1558 }
1559}
1560
1561void InterpreterMacroAssembler::profile_call(Register mdp) {
1562 if (ProfileInterpreter) {
1563 Label profile_continue;
1564
1565 // If no method data exists, go to profile_continue.
1566 test_method_data_pointer(mdp, profile_continue);
1567
1568 // We are making a call. Increment the count.
1569 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1570
1571 // The method data pointer needs to be updated to reflect the new target.
1572 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1573 bind(profile_continue);
1574 }
1575}
1576
1577
1578void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1579 if (ProfileInterpreter) {
1580 Label profile_continue;
1581
1582 // If no method data exists, go to profile_continue.
1583 test_method_data_pointer(mdp, profile_continue);
1584
1585 // We are making a call. Increment the count.
1586 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1587
1588 // The method data pointer needs to be updated to reflect the new target.
1589 update_mdp_by_constant(mdp,
1590 in_bytes(VirtualCallData::
1591 virtual_call_data_size()));
1592 bind(profile_continue);
1593 }
1594}
1595
1596
1597void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1598 Register mdp,
1599 Register reg2,
1600 bool receiver_can_be_null) {
1601 if (ProfileInterpreter) {
1602 Label profile_continue;
1603
1604 // If no method data exists, go to profile_continue.
1605 test_method_data_pointer(mdp, profile_continue);
1606
1607 Label skip_receiver_profile;
1608 if (receiver_can_be_null) {
1609 Label not_null;
1610 testptr(receiver, receiver);
1611 jccb(Assembler::notZero, not_null);
1612 // We are making a call. Increment the count for null receiver.
1613 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1614 jmp(skip_receiver_profile);
1615 bind(not_null);
1616 }
1617
1618 // Record the receiver type.
1619 record_klass_in_profile(receiver, mdp, reg2, true);
1620 bind(skip_receiver_profile);
1621
1622 // The method data pointer needs to be updated to reflect the new target.
1623#if INCLUDE_JVMCI
1624 if (MethodProfileWidth == 0) {
1625 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1626 }
1627#else // INCLUDE_JVMCI
1628 update_mdp_by_constant(mdp,
1629 in_bytes(VirtualCallData::
1630 virtual_call_data_size()));
1631#endif // INCLUDE_JVMCI
1632 bind(profile_continue);
1633 }
1634}
1635
1636#if INCLUDE_JVMCI
1637void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) {
1638 assert_different_registers(method, mdp, reg2);
1639 if (ProfileInterpreter && MethodProfileWidth > 0) {
1640 Label profile_continue;
1641
1642 // If no method data exists, go to profile_continue.
1643 test_method_data_pointer(mdp, profile_continue);
1644
1645 Label done;
1646 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth,
1647 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset()));
1648 bind(done);
1649
1650 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1651 bind(profile_continue);
1652 }
1653}
1654#endif // INCLUDE_JVMCI
1655
1656// This routine creates a state machine for updating the multi-row
1657// type profile at a virtual call site (or other type-sensitive bytecode).
1658// The machine visits each row (of receiver/count) until the receiver type
1659// is found, or until it runs out of rows. At the same time, it remembers
1660// the location of the first empty row. (An empty row records null for its
1661// receiver, and can be allocated for a newly-observed receiver type.)
1662// Because there are two degrees of freedom in the state, a simple linear
1663// search will not work; it must be a decision tree. Hence this helper
1664// function is recursive, to generate the required tree structured code.
1665// It's the interpreter, so we are trading off code space for speed.
1666// See below for example code.
1667void InterpreterMacroAssembler::record_klass_in_profile_helper(
1668 Register receiver, Register mdp,
1669 Register reg2, int start_row,
1670 Label& done, bool is_virtual_call) {
1671 if (TypeProfileWidth == 0) {
1672 if (is_virtual_call) {
1673 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1674 }
1675#if INCLUDE_JVMCI
1676 else if (EnableJVMCI) {
1677 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()));
1678 }
1679#endif // INCLUDE_JVMCI
1680 } else {
1681 int non_profiled_offset = -1;
1682 if (is_virtual_call) {
1683 non_profiled_offset = in_bytes(CounterData::count_offset());
1684 }
1685#if INCLUDE_JVMCI
1686 else if (EnableJVMCI) {
1687 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset());
1688 }
1689#endif // INCLUDE_JVMCI
1690
1691 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth,
1692 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset);
1693 }
1694}
1695
1696void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp,
1697 Register reg2, int start_row, Label& done, int total_rows,
1698 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,
1699 int non_profiled_offset) {
1700 int last_row = total_rows - 1;
1701 assert(start_row <= last_row, "must be work left to do");
1702 // Test this row for both the item and for null.
1703 // Take any of three different outcomes:
1704 // 1. found item => increment count and goto done
1705 // 2. found null => keep looking for case 1, maybe allocate this cell
1706 // 3. found something else => keep looking for cases 1 and 2
1707 // Case 3 is handled by a recursive call.
1708 for (int row = start_row; row <= last_row; row++) {
1709 Label next_test;
1710 bool test_for_null_also = (row == start_row);
1711
1712 // See if the item is item[n].
1713 int item_offset = in_bytes(item_offset_fn(row));
1714 test_mdp_data_at(mdp, item_offset, item,
1715 (test_for_null_also ? reg2 : noreg),
1716 next_test);
1717 // (Reg2 now contains the item from the CallData.)
1718
1719 // The item is item[n]. Increment count[n].
1720 int count_offset = in_bytes(item_count_offset_fn(row));
1721 increment_mdp_data_at(mdp, count_offset);
1722 jmp(done);
1723 bind(next_test);
1724
1725 if (test_for_null_also) {
1726 // Failed the equality check on item[n]... Test for null.
1727 testptr(reg2, reg2);
1728 if (start_row == last_row) {
1729 // The only thing left to do is handle the null case.
1730 if (non_profiled_offset >= 0) {
1731 Label found_null;
1732 jccb(Assembler::zero, found_null);
1733 // Item did not match any saved item and there is no empty row for it.
1734 // Increment total counter to indicate polymorphic case.
1735 increment_mdp_data_at(mdp, non_profiled_offset);
1736 jmp(done);
1737 bind(found_null);
1738 } else {
1739 jcc(Assembler::notZero, done);
1740 }
1741 break;
1742 }
1743 Label found_null;
1744 // Since null is rare, make it be the branch-taken case.
1745 jcc(Assembler::zero, found_null);
1746
1747 // Put all the "Case 3" tests here.
1748 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows,
1749 item_offset_fn, item_count_offset_fn, non_profiled_offset);
1750
1751 // Found a null. Keep searching for a matching item,
1752 // but remember that this is an empty (unused) slot.
1753 bind(found_null);
1754 }
1755 }
1756
1757 // In the fall-through case, we found no matching item, but we
1758 // observed the item[start_row] is NULL.
1759
1760 // Fill in the item field and increment the count.
1761 int item_offset = in_bytes(item_offset_fn(start_row));
1762 set_mdp_data_at(mdp, item_offset, item);
1763 int count_offset = in_bytes(item_count_offset_fn(start_row));
1764 movl(reg2, DataLayout::counter_increment);
1765 set_mdp_data_at(mdp, count_offset, reg2);
1766 if (start_row > 0) {
1767 jmp(done);
1768 }
1769}
1770
1771// Example state machine code for three profile rows:
1772// // main copy of decision tree, rooted at row[1]
1773// if (row[0].rec == rec) { row[0].incr(); goto done; }
1774// if (row[0].rec != NULL) {
1775// // inner copy of decision tree, rooted at row[1]
1776// if (row[1].rec == rec) { row[1].incr(); goto done; }
1777// if (row[1].rec != NULL) {
1778// // degenerate decision tree, rooted at row[2]
1779// if (row[2].rec == rec) { row[2].incr(); goto done; }
1780// if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1781// row[2].init(rec); goto done;
1782// } else {
1783// // remember row[1] is empty
1784// if (row[2].rec == rec) { row[2].incr(); goto done; }
1785// row[1].init(rec); goto done;
1786// }
1787// } else {
1788// // remember row[0] is empty
1789// if (row[1].rec == rec) { row[1].incr(); goto done; }
1790// if (row[2].rec == rec) { row[2].incr(); goto done; }
1791// row[0].init(rec); goto done;
1792// }
1793// done:
1794
1795void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1796 Register mdp, Register reg2,
1797 bool is_virtual_call) {
1798 assert(ProfileInterpreter, "must be profiling");
1799 Label done;
1800
1801 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1802
1803 bind (done);
1804}
1805
1806void InterpreterMacroAssembler::profile_ret(Register return_bci,
1807 Register mdp) {
1808 if (ProfileInterpreter) {
1809 Label profile_continue;
1810 uint row;
1811
1812 // If no method data exists, go to profile_continue.
1813 test_method_data_pointer(mdp, profile_continue);
1814
1815 // Update the total ret count.
1816 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1817
1818 for (row = 0; row < RetData::row_limit(); row++) {
1819 Label next_test;
1820
1821 // See if return_bci is equal to bci[n]:
1822 test_mdp_data_at(mdp,
1823 in_bytes(RetData::bci_offset(row)),
1824 return_bci, noreg,
1825 next_test);
1826
1827 // return_bci is equal to bci[n]. Increment the count.
1828 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1829
1830 // The method data pointer needs to be updated to reflect the new target.
1831 update_mdp_by_offset(mdp,
1832 in_bytes(RetData::bci_displacement_offset(row)));
1833 jmp(profile_continue);
1834 bind(next_test);
1835 }
1836
1837 update_mdp_for_ret(return_bci);
1838
1839 bind(profile_continue);
1840 }
1841}
1842
1843
1844void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1845 if (ProfileInterpreter) {
1846 Label profile_continue;
1847
1848 // If no method data exists, go to profile_continue.
1849 test_method_data_pointer(mdp, profile_continue);
1850
1851 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1852
1853 // The method data pointer needs to be updated.
1854 int mdp_delta = in_bytes(BitData::bit_data_size());
1855 if (TypeProfileCasts) {
1856 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1857 }
1858 update_mdp_by_constant(mdp, mdp_delta);
1859
1860 bind(profile_continue);
1861 }
1862}
1863
1864
1865void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1866 if (ProfileInterpreter && TypeProfileCasts) {
1867 Label profile_continue;
1868
1869 // If no method data exists, go to profile_continue.
1870 test_method_data_pointer(mdp, profile_continue);
1871
1872 int count_offset = in_bytes(CounterData::count_offset());
1873 // Back up the address, since we have already bumped the mdp.
1874 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1875
1876 // *Decrement* the counter. We expect to see zero or small negatives.
1877 increment_mdp_data_at(mdp, count_offset, true);
1878
1879 bind (profile_continue);
1880 }
1881}
1882
1883
1884void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, 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 // The method data pointer needs to be updated.
1892 int mdp_delta = in_bytes(BitData::bit_data_size());
1893 if (TypeProfileCasts) {
1894 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1895
1896 // Record the object type.
1897 record_klass_in_profile(klass, mdp, reg2, false);
1898 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1899 NOT_LP64(restore_locals();) // Restore EDI
1900 }
1901 update_mdp_by_constant(mdp, mdp_delta);
1902
1903 bind(profile_continue);
1904 }
1905}
1906
1907
1908void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1909 if (ProfileInterpreter) {
1910 Label profile_continue;
1911
1912 // If no method data exists, go to profile_continue.
1913 test_method_data_pointer(mdp, profile_continue);
1914
1915 // Update the default case count
1916 increment_mdp_data_at(mdp,
1917 in_bytes(MultiBranchData::default_count_offset()));
1918
1919 // The method data pointer needs to be updated.
1920 update_mdp_by_offset(mdp,
1921 in_bytes(MultiBranchData::
1922 default_displacement_offset()));
1923
1924 bind(profile_continue);
1925 }
1926}
1927
1928
1929void InterpreterMacroAssembler::profile_switch_case(Register index,
1930 Register mdp,
1931 Register reg2) {
1932 if (ProfileInterpreter) {
1933 Label profile_continue;
1934
1935 // If no method data exists, go to profile_continue.
1936 test_method_data_pointer(mdp, profile_continue);
1937
1938 // Build the base (index * per_case_size_in_bytes()) +
1939 // case_array_offset_in_bytes()
1940 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1941 imulptr(index, reg2); // XXX l ?
1942 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1943
1944 // Update the case count
1945 increment_mdp_data_at(mdp,
1946 index,
1947 in_bytes(MultiBranchData::relative_count_offset()));
1948
1949 // The method data pointer needs to be updated.
1950 update_mdp_by_offset(mdp,
1951 index,
1952 in_bytes(MultiBranchData::
1953 relative_displacement_offset()));
1954
1955 bind(profile_continue);
1956 }
1957}
1958
1959
1960
1961void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1962 if (state == atos) {
1963 MacroAssembler::verify_oop(reg);
1964 }
1965}
1966
1967void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1968#ifndef _LP64
1969 if ((state == ftos && UseSSE < 1) ||
1970 (state == dtos && UseSSE < 2)) {
1971 MacroAssembler::verify_FPU(stack_depth);
1972 }
1973#endif
1974}
1975
1976// Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1977void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1978 int increment, Address mask,
1979 Register scratch, bool preloaded,
1980 Condition cond, Label* where) {
1981 if (!preloaded) {
1982 movl(scratch, counter_addr);
1983 }
1984 incrementl(scratch, increment);
1985 movl(counter_addr, scratch);
1986 andl(scratch, mask);
1987 if (where != NULL) {
1988 jcc(cond, *where);
1989 }
1990}
1991
1992void InterpreterMacroAssembler::notify_method_entry() {
1993 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1994 // track stack depth. If it is possible to enter interp_only_mode we add
1995 // the code to check if the event should be sent.
1996 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1997 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1998 if (JvmtiExport::can_post_interpreter_events()) {
1999 Label L;
2000 NOT_LP64(get_thread(rthread);)
2001 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2002 testl(rdx, rdx);
2003 jcc(Assembler::zero, L);
2004 call_VM(noreg, CAST_FROM_FN_PTR(address,
2005 InterpreterRuntime::post_method_entry));
2006 bind(L);
2007 }
2008
2009 {
2010 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2011 NOT_LP64(get_thread(rthread);)
2012 get_method(rarg);
2013 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2014 rthread, rarg);
2015 }
2016
2017 // RedefineClasses() tracing support for obsolete method entry
2018 if (log_is_enabled(Trace, redefine, class, obsolete)) {
2019 NOT_LP64(get_thread(rthread);)
2020 get_method(rarg);
2021 call_VM_leaf(
2022 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2023 rthread, rarg);
2024 }
2025}
2026
2027
2028void InterpreterMacroAssembler::notify_method_exit(
2029 TosState state, NotifyMethodExitMode mode) {
2030 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
2031 // track stack depth. If it is possible to enter interp_only_mode we add
2032 // the code to check if the event should be sent.
2033 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
2034 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
2035 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2036 Label L;
2037 // Note: frame::interpreter_frame_result has a dependency on how the
2038 // method result is saved across the call to post_method_exit. If this
2039 // is changed then the interpreter_frame_result implementation will
2040 // need to be updated too.
2041
2042 // template interpreter will leave the result on the top of the stack.
2043 push(state);
2044 NOT_LP64(get_thread(rthread);)
2045 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
2046 testl(rdx, rdx);
2047 jcc(Assembler::zero, L);
2048 call_VM(noreg,
2049 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2050 bind(L);
2051 pop(state);
2052 }
2053
2054 {
2055 SkipIfEqual skip(this, &DTraceMethodProbes, false);
2056 push(state);
2057 NOT_LP64(get_thread(rthread);)
2058 get_method(rarg);
2059 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2060 rthread, rarg);
2061 pop(state);
2062 }
2063}
2064