1 /*
2 * Copyright (c) 1997, 2015, 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 "oops/arrayOop.hpp"
30 #include "oops/markOop.hpp"
31 #include "oops/methodData.hpp"
32 #include "oops/method.hpp"
33 #include "prims/jvmtiExport.hpp"
34 #include "prims/jvmtiRedefineClassesTrace.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 #ifndef CC_INTERP
44 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
45 Label update, next, none;
46
47 verify_oop(obj);
48
49 testptr(obj, obj);
50 jccb(Assembler::notZero, update);
51 orptr(mdo_addr, TypeEntries::null_seen);
52 jmpb(next);
53
54 bind(update);
55 load_klass(obj, obj);
56
57 xorptr(obj, mdo_addr);
58 testptr(obj, TypeEntries::type_klass_mask);
59 jccb(Assembler::zero, next); // klass seen before, nothing to
60 // do. The unknown bit may have been
61 // set already but no need to check.
62
63 testptr(obj, TypeEntries::type_unknown);
64 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
65
66 cmpptr(mdo_addr, 0);
67 jccb(Assembler::equal, none);
68 cmpptr(mdo_addr, TypeEntries::null_seen);
69 jccb(Assembler::equal, none);
70 // There is a chance that the checks above (re-reading profiling
71 // data from memory) fail if another thread has just set the
72 // profiling to this obj's klass
73 xorptr(obj, mdo_addr);
74 testptr(obj, TypeEntries::type_klass_mask);
75 jccb(Assembler::zero, next);
76
77 // different than before. Cannot keep accurate profile.
78 orptr(mdo_addr, TypeEntries::type_unknown);
79 jmpb(next);
80
81 bind(none);
82 // first time here. Set profile type.
83 movptr(mdo_addr, obj);
84
85 bind(next);
86 }
87
88 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
89 if (!ProfileInterpreter) {
90 return;
91 }
92
93 if (MethodData::profile_arguments() || MethodData::profile_return()) {
94 Label profile_continue;
95
96 test_method_data_pointer(mdp, profile_continue);
97
98 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
99
100 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
101 jcc(Assembler::notEqual, profile_continue);
102
103 if (MethodData::profile_arguments()) {
104 Label done;
105 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
106 addptr(mdp, off_to_args);
107
108 for (int i = 0; i < TypeProfileArgsLimit; i++) {
109 if (i > 0 || MethodData::profile_return()) {
110 // If return value type is profiled we may have no argument to profile
111 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
112 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
113 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
114 jcc(Assembler::less, done);
115 }
116 movptr(tmp, Address(callee, Method::const_offset()));
117 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
118 // stack offset o (zero based) from the start of the argument
119 // list, for n arguments translates into offset n - o - 1 from
120 // the end of the argument list
121 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
122 subl(tmp, 1);
123 Address arg_addr = argument_address(tmp);
124 movptr(tmp, arg_addr);
125
126 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
127 profile_obj_type(tmp, mdo_arg_addr);
128
129 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
130 addptr(mdp, to_add);
131 off_to_args += to_add;
132 }
133
134 if (MethodData::profile_return()) {
135 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
136 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
137 }
138
139 bind(done);
140
141 if (MethodData::profile_return()) {
142 // We're right after the type profile for the last
143 // argument. tmp is the number of cells left in the
144 // CallTypeData/VirtualCallTypeData to reach its end. Non null
145 // if there's a return to profile.
146 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
147 shll(tmp, exact_log2(DataLayout::cell_size));
148 addptr(mdp, tmp);
149 }
150 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp);
151 } else {
152 assert(MethodData::profile_return(), "either profile call args or call ret");
153 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
154 }
155
156 // mdp points right after the end of the
157 // CallTypeData/VirtualCallTypeData, right after the cells for the
158 // return value type if there's one
159
160 bind(profile_continue);
161 }
162 }
163
164 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
165 assert_different_registers(mdp, ret, tmp, _bcp_register);
166 if (ProfileInterpreter && MethodData::profile_return()) {
167 Label profile_continue, done;
168
169 test_method_data_pointer(mdp, profile_continue);
170
171 if (MethodData::profile_return_jsr292_only()) {
172 // If we don't profile all invoke bytecodes we must make sure
173 // it's a bytecode we indeed profile. We can't go back to the
174 // begining of the ProfileData we intend to update to check its
175 // type because we're right after it and we don't known its
176 // length
177 Label do_profile;
178 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
179 jcc(Assembler::equal, do_profile);
180 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
181 jcc(Assembler::equal, do_profile);
182 get_method(tmp);
183 cmpb(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
184 jcc(Assembler::notEqual, profile_continue);
185
186 bind(do_profile);
187 }
188
189 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
190 mov(tmp, ret);
191 profile_obj_type(tmp, mdo_ret_addr);
192
193 bind(profile_continue);
194 }
195 }
196
197 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
198 if (ProfileInterpreter && MethodData::profile_parameters()) {
199 Label profile_continue, done;
200
201 test_method_data_pointer(mdp, profile_continue);
202
203 // Load the offset of the area within the MDO used for
204 // parameters. If it's negative we're not profiling any parameters
205 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
206 testl(tmp1, tmp1);
207 jcc(Assembler::negative, profile_continue);
208
209 // Compute a pointer to the area for parameters from the offset
210 // and move the pointer to the slot for the last
211 // parameters. Collect profiling from last parameter down.
212 // mdo start + parameters offset + array length - 1
213 addptr(mdp, tmp1);
214 movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
215 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
216
217 Label loop;
218 bind(loop);
219
220 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
221 int type_base = in_bytes(ParametersTypeData::type_offset(0));
222 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
223 Address arg_off(mdp, tmp1, per_arg_scale, off_base);
224 Address arg_type(mdp, tmp1, per_arg_scale, type_base);
225
226 // load offset on the stack from the slot for this parameter
227 movptr(tmp2, arg_off);
228 negptr(tmp2);
229 // read the parameter from the local area
230 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
231
232 // profile the parameter
233 profile_obj_type(tmp2, arg_type);
234
235 // go to next parameter
236 decrement(tmp1, TypeStackSlotEntries::per_arg_count());
237 jcc(Assembler::positive, loop);
238
239 bind(profile_continue);
240 }
241 }
242 #endif
243
244 #ifdef CC_INTERP
245 void InterpreterMacroAssembler::get_method(Register reg) {
246 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
247 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
248 }
249 #endif // CC_INTERP
250
251 #ifndef CC_INTERP
252 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
253 int number_of_arguments) {
254 // interpreter specific
255 //
256 // Note: No need to save/restore bcp & locals registers
257 // since these are callee saved registers and no blocking/
258 // GC can happen in leaf calls.
259 // Further Note: DO NOT save/restore bcp/locals. If a caller has
260 // already saved them so that it can use rsi/rdi as temporaries
261 // then a save/restore here will DESTROY the copy the caller
262 // saved! There used to be a save_bcp() that only happened in
263 // the ASSERT path (no restore_bcp). Which caused bizarre failures
264 // when jvm built with ASSERTs.
265 #ifdef ASSERT
266 {
267 Label L;
268 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
269 jcc(Assembler::equal, L);
270 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
271 " last_sp != NULL");
272 bind(L);
273 }
274 #endif
275 // super call
276 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
277 // interpreter specific
278 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals
279 // but since they may not have been saved (and we don't want to
280 // save them here (see note above) the assert is invalid.
281 }
282
283 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
284 Register java_thread,
285 Register last_java_sp,
286 address entry_point,
287 int number_of_arguments,
288 bool check_exceptions) {
289 // interpreter specific
290 //
291 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
292 // really make a difference for these runtime calls, since they are
293 // slow anyway. Btw., bcp must be saved/restored since it may change
294 // due to GC.
295 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
296 save_bcp();
297 #ifdef ASSERT
298 {
299 Label L;
300 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
301 jcc(Assembler::equal, L);
302 stop("InterpreterMacroAssembler::call_VM_leaf_base:"
303 " last_sp != NULL");
304 bind(L);
305 }
306 #endif /* ASSERT */
307 // super call
308 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
309 entry_point, number_of_arguments,
310 check_exceptions);
311 // interpreter specific
312 restore_bcp();
313 restore_locals();
314 }
315
316 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
317 if (JvmtiExport::can_pop_frame()) {
318 Label L;
319 // Initiate popframe handling only if it is not already being
320 // processed. If the flag has the popframe_processing bit set, it
321 // means that this code is called *during* popframe handling - we
322 // don't want to reenter.
323 // This method is only called just after the call into the vm in
324 // call_VM_base, so the arg registers are available.
325 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
326 LP64_ONLY(c_rarg0);
327 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
328 testl(pop_cond, JavaThread::popframe_pending_bit);
329 jcc(Assembler::zero, L);
330 testl(pop_cond, JavaThread::popframe_processing_bit);
331 jcc(Assembler::notZero, L);
332 // Call Interpreter::remove_activation_preserving_args_entry() to get the
333 // address of the same-named entrypoint in the generated interpreter code.
334 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
335 jmp(rax);
336 bind(L);
337 NOT_LP64(get_thread(java_thread);)
338 }
339 }
340
341 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
342 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
343 NOT_LP64(get_thread(thread);)
344 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
345 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
346 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
347 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
348 #ifdef _LP64
349 switch (state) {
350 case atos: movptr(rax, oop_addr);
351 movptr(oop_addr, (int32_t)NULL_WORD);
352 verify_oop(rax, state); break;
353 case ltos: movptr(rax, val_addr); break;
354 case btos: // 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 ctos: // fall through
377 case stos: // fall through
378 case itos: movl(rax, val_addr); break;
379 case ftos: load_float(val_addr); break;
380 case dtos: load_double(val_addr); break;
381 case vtos: /* nothing to do */ break;
382 default : ShouldNotReachHere();
383 }
384 #endif // _LP64
385 // Clean up tos value in the thread object
386 movl(tos_addr, (int32_t) ilgl);
387 movptr(val_addr, NULL_WORD);
388 NOT_LP64(movptr(val_addr1, NULL_WORD);)
389 }
390
391
392 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
393 if (JvmtiExport::can_force_early_return()) {
394 Label L;
395 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
396 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
397
398 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
399 testptr(tmp, tmp);
400 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
401
402 // Initiate earlyret handling only if it is not already being processed.
403 // If the flag has the earlyret_processing bit set, it means that this code
404 // is called *during* earlyret handling - we don't want to reenter.
405 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
406 cmpl(tmp, JvmtiThreadState::earlyret_pending);
407 jcc(Assembler::notEqual, L);
408
409 // Call Interpreter::remove_activation_early_entry() to get the address of the
410 // same-named entrypoint in the generated interpreter code.
411 NOT_LP64(get_thread(java_thread);)
412 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
413 #ifdef _LP64
414 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
415 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
416 #else
417 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
418 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
419 #endif // _LP64
420 jmp(rax);
421 bind(L);
422 NOT_LP64(get_thread(java_thread);)
423 }
424 }
425
426 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
427 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
428 load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
429 bswapl(reg);
430 shrl(reg, 16);
431 }
432
433 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
434 int bcp_offset,
435 size_t index_size) {
436 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
437 if (index_size == sizeof(u2)) {
438 load_unsigned_short(index, Address(_bcp_register, bcp_offset));
439 } else if (index_size == sizeof(u4)) {
440 movl(index, Address(_bcp_register, bcp_offset));
441 // Check if the secondary index definition is still ~x, otherwise
442 // we have to change the following assembler code to calculate the
443 // plain index.
444 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
445 notl(index); // convert to plain index
446 } else if (index_size == sizeof(u1)) {
447 load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
448 } else {
449 ShouldNotReachHere();
450 }
451 }
452
453 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
454 Register index,
455 int bcp_offset,
456 size_t index_size) {
457 assert_different_registers(cache, index);
458 get_cache_index_at_bcp(index, bcp_offset, index_size);
459 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
460 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
461 // convert from field index to ConstantPoolCacheEntry index
462 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
463 shll(index, 2);
464 }
465
466 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
467 Register index,
468 Register bytecode,
469 int byte_no,
470 int bcp_offset,
471 size_t index_size) {
472 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
473 // We use a 32-bit load here since the layout of 64-bit words on
474 // little-endian machines allow us that.
475 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
476 const int shift_count = (1 + byte_no) * BitsPerByte;
477 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
478 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
479 "correct shift count");
480 shrl(bytecode, shift_count);
481 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
482 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
483 }
484
485 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
486 Register tmp,
487 int bcp_offset,
488 size_t index_size) {
489 assert(cache != tmp, "must use different register");
490 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
491 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
492 // convert from field index to ConstantPoolCacheEntry index
493 // and from word offset to byte offset
494 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
495 shll(tmp, 2 + LogBytesPerWord);
496 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
497 // skip past the header
498 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
499 addptr(cache, tmp); // construct pointer to cache entry
500 }
501
502 // Load object from cpool->resolved_references(index)
503 void InterpreterMacroAssembler::load_resolved_reference_at_index(
504 Register result, Register index) {
505 assert_different_registers(result, index);
506 // convert from field index to resolved_references() index and from
507 // word index to byte offset. Since this is a java object, it can be compressed
508 Register tmp = index; // reuse
509 shll(tmp, LogBytesPerHeapOop);
510
511 get_constant_pool(result);
512 // load pointer for resolved_references[] objArray
513 movptr(result, Address(result, ConstantPool::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
522 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
523 // subtype of super_klass.
524 //
525 // Args:
526 // rax: superklass
527 // Rsub_klass: subklass
528 //
529 // Kills:
530 // rcx, rdi
531 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
532 Label& ok_is_subtype) {
533 assert(Rsub_klass != rax, "rax holds superklass");
534 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
535 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
536 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
537 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
538
539 // Profile the not-null value's klass.
540 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
541
542 // Do the check.
543 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
544
545 // Profile the failure of the check.
546 profile_typecheck_failed(rcx); // blows rcx
547 }
548
549
550 #ifndef _LP64
551 void InterpreterMacroAssembler::f2ieee() {
552 if (IEEEPrecision) {
553 fstp_s(Address(rsp, 0));
554 fld_s(Address(rsp, 0));
555 }
556 }
557
558
559 void InterpreterMacroAssembler::d2ieee() {
560 if (IEEEPrecision) {
561 fstp_d(Address(rsp, 0));
562 fld_d(Address(rsp, 0));
563 }
564 }
565 #endif // _LP64
566
567 // Java Expression Stack
568
569 void InterpreterMacroAssembler::pop_ptr(Register r) {
570 pop(r);
571 }
572
573 void InterpreterMacroAssembler::push_ptr(Register r) {
574 push(r);
575 }
576
577 void InterpreterMacroAssembler::push_i(Register r) {
578 push(r);
579 }
580
581 void InterpreterMacroAssembler::push_f(XMMRegister r) {
582 subptr(rsp, wordSize);
583 movflt(Address(rsp, 0), r);
584 }
585
586 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
587 movflt(r, Address(rsp, 0));
588 addptr(rsp, wordSize);
589 }
590
591 void InterpreterMacroAssembler::push_d(XMMRegister r) {
592 subptr(rsp, 2 * wordSize);
593 movdbl(Address(rsp, 0), r);
594 }
595
596 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
597 movdbl(r, Address(rsp, 0));
598 addptr(rsp, 2 * Interpreter::stackElementSize);
599 }
600
601 #ifdef _LP64
602 void InterpreterMacroAssembler::pop_i(Register r) {
603 // XXX can't use pop currently, upper half non clean
604 movl(r, Address(rsp, 0));
605 addptr(rsp, wordSize);
606 }
607
608 void InterpreterMacroAssembler::pop_l(Register r) {
609 movq(r, Address(rsp, 0));
610 addptr(rsp, 2 * Interpreter::stackElementSize);
611 }
612
613 void InterpreterMacroAssembler::push_l(Register r) {
614 subptr(rsp, 2 * wordSize);
615 movq(Address(rsp, 0), r);
616 }
617
618 void InterpreterMacroAssembler::pop(TosState state) {
619 switch (state) {
620 case atos: pop_ptr(); break;
621 case btos:
622 case ctos:
623 case stos:
624 case itos: pop_i(); break;
625 case ltos: pop_l(); break;
626 case ftos: pop_f(xmm0); break;
627 case dtos: pop_d(xmm0); break;
628 case vtos: /* nothing to do */ break;
629 default: ShouldNotReachHere();
630 }
631 verify_oop(rax, state);
632 }
633
634 void InterpreterMacroAssembler::push(TosState state) {
635 verify_oop(rax, state);
636 switch (state) {
637 case atos: push_ptr(); break;
638 case btos:
639 case ctos:
640 case stos:
641 case itos: push_i(); break;
642 case ltos: push_l(); break;
643 case ftos: push_f(xmm0); break;
644 case dtos: push_d(xmm0); break;
645 case vtos: /* nothing to do */ break;
646 default : ShouldNotReachHere();
647 }
648 }
649 #else
650 void InterpreterMacroAssembler::pop_i(Register r) {
651 pop(r);
652 }
653
654 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
655 pop(lo);
656 pop(hi);
657 }
658
659 void InterpreterMacroAssembler::pop_f() {
660 fld_s(Address(rsp, 0));
661 addptr(rsp, 1 * wordSize);
662 }
663
664 void InterpreterMacroAssembler::pop_d() {
665 fld_d(Address(rsp, 0));
666 addptr(rsp, 2 * wordSize);
667 }
668
669
670 void InterpreterMacroAssembler::pop(TosState state) {
671 switch (state) {
672 case atos: pop_ptr(rax); break;
673 case btos: // fall through
674 case ctos: // fall through
675 case stos: // fall through
676 case itos: pop_i(rax); break;
677 case ltos: pop_l(rax, rdx); break;
678 case ftos:
679 if (UseSSE >= 1) {
680 pop_f(xmm0);
681 } else {
682 pop_f();
683 }
684 break;
685 case dtos:
686 if (UseSSE >= 2) {
687 pop_d(xmm0);
688 } else {
689 pop_d();
690 }
691 break;
692 case vtos: /* nothing to do */ break;
693 default : ShouldNotReachHere();
694 }
695 verify_oop(rax, state);
696 }
697
698
699 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
700 push(hi);
701 push(lo);
702 }
703
704 void InterpreterMacroAssembler::push_f() {
705 // Do not schedule for no AGI! Never write beyond rsp!
706 subptr(rsp, 1 * wordSize);
707 fstp_s(Address(rsp, 0));
708 }
709
710 void InterpreterMacroAssembler::push_d() {
711 // Do not schedule for no AGI! Never write beyond rsp!
712 subptr(rsp, 2 * wordSize);
713 fstp_d(Address(rsp, 0));
714 }
715
716
717 void InterpreterMacroAssembler::push(TosState state) {
718 verify_oop(rax, state);
719 switch (state) {
720 case atos: push_ptr(rax); break;
721 case btos: // fall through
722 case ctos: // fall through
723 case stos: // fall through
724 case itos: push_i(rax); break;
725 case ltos: push_l(rax, rdx); break;
726 case ftos:
727 if (UseSSE >= 1) {
728 push_f(xmm0);
729 } else {
730 push_f();
731 }
732 break;
733 case dtos:
734 if (UseSSE >= 2) {
735 push_d(xmm0);
736 } else {
737 push_d();
738 }
739 break;
740 case vtos: /* nothing to do */ break;
741 default : ShouldNotReachHere();
742 }
743 }
744 #endif // _LP64
745
746
747 // Helpers for swap and dup
748 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
749 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
750 }
751
752 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
753 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
754 }
755
756
757 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
758 // set sender sp
759 lea(_bcp_register, Address(rsp, wordSize));
760 // record last_sp
761 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
762 }
763
764
765 // Jump to from_interpreted entry of a call unless single stepping is possible
766 // in this thread in which case we must call the i2i entry
767 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
768 prepare_to_jump_from_interpreted();
769
770 if (JvmtiExport::can_post_interpreter_events()) {
771 Label run_compiled_code;
772 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
773 // compiled code in threads for which the event is enabled. Check here for
774 // interp_only_mode if these events CAN be enabled.
775 // interp_only is an int, on little endian it is sufficient to test the byte only
776 // Is a cmpl faster?
777 LP64_ONLY(temp = r15_thread;)
778 NOT_LP64(get_thread(temp);)
779 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
780 jccb(Assembler::zero, run_compiled_code);
781 jmp(Address(method, Method::interpreter_entry_offset()));
782 bind(run_compiled_code);
783 }
784
785 jmp(Address(method, Method::from_interpreted_offset()));
786 }
787
788 // The following two routines provide a hook so that an implementation
789 // can schedule the dispatch in two parts. x86 does not do this.
790 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
791 // Nothing x86 specific to be done here
792 }
793
794 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
795 dispatch_next(state, step);
796 }
797
798 void InterpreterMacroAssembler::dispatch_base(TosState state,
799 address* table,
800 bool verifyoop) {
801 verify_FPU(1, state);
802 if (VerifyActivationFrameSize) {
803 Label L;
804 mov(rcx, rbp);
805 subptr(rcx, rsp);
806 int32_t min_frame_size =
807 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
808 wordSize;
809 cmpptr(rcx, (int32_t)min_frame_size);
810 jcc(Assembler::greaterEqual, L);
811 stop("broken stack frame");
812 bind(L);
813 }
814 if (verifyoop) {
815 verify_oop(rax, state);
816 }
817 #ifdef _LP64
818 lea(rscratch1, ExternalAddress((address)table));
819 jmp(Address(rscratch1, rbx, Address::times_8));
820 #else
821 Address index(noreg, rbx, Address::times_ptr);
822 ExternalAddress tbl((address)table);
823 ArrayAddress dispatch(tbl, index);
824 jump(dispatch);
825 #endif // _LP64
826 }
827
828 void InterpreterMacroAssembler::dispatch_only(TosState state) {
829 dispatch_base(state, Interpreter::dispatch_table(state));
830 }
831
832 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
833 dispatch_base(state, Interpreter::normal_table(state));
834 }
835
836 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
837 dispatch_base(state, Interpreter::normal_table(state), false);
838 }
839
840
841 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
842 // load next bytecode (load before advancing _bcp_register to prevent AGI)
843 load_unsigned_byte(rbx, Address(_bcp_register, step));
844 // advance _bcp_register
845 increment(_bcp_register, step);
846 dispatch_base(state, Interpreter::dispatch_table(state));
847 }
848
849 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
850 // load current bytecode
851 load_unsigned_byte(rbx, Address(_bcp_register, 0));
852 dispatch_base(state, table);
853 }
854
855 // remove activation
856 //
857 // Unlock the receiver if this is a synchronized method.
858 // Unlock any Java monitors from syncronized blocks.
859 // Remove the activation from the stack.
860 //
861 // If there are locked Java monitors
862 // If throw_monitor_exception
863 // throws IllegalMonitorStateException
864 // Else if install_monitor_exception
865 // installs IllegalMonitorStateException
866 // Else
867 // no error processing
868 void InterpreterMacroAssembler::remove_activation(
869 TosState state,
870 Register ret_addr,
871 bool throw_monitor_exception,
872 bool install_monitor_exception,
873 bool notify_jvmdi) {
874 // Note: Registers rdx xmm0 may be in use for the
875 // result check if synchronized method
876 Label unlocked, unlock, no_unlock;
877
878 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
879 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
880 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
881 // monitor pointers need different register
882 // because rdx may have the result in it
883 NOT_LP64(get_thread(rcx);)
884
885 // get the value of _do_not_unlock_if_synchronized into rdx
886 const Address do_not_unlock_if_synchronized(rthread,
887 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
888 movbool(rbx, do_not_unlock_if_synchronized);
889 movbool(do_not_unlock_if_synchronized, false); // reset the flag
890
891 // get method access flags
892 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
893 movl(rcx, Address(rcx, Method::access_flags_offset()));
894 testl(rcx, JVM_ACC_SYNCHRONIZED);
895 jcc(Assembler::zero, unlocked);
896
897 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
898 // is set.
899 testbool(rbx);
900 jcc(Assembler::notZero, no_unlock);
901
902 // unlock monitor
903 push(state); // save result
904
905 // BasicObjectLock will be first in list, since this is a
906 // synchronized method. However, need to check that the object has
907 // not been unlocked by an explicit monitorexit bytecode.
908 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
909 wordSize - (int) sizeof(BasicObjectLock));
910 // We use c_rarg1/rdx so that if we go slow path it will be the correct
911 // register for unlock_object to pass to VM directly
912 lea(robj, monitor); // address of first monitor
913
914 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
915 testptr(rax, rax);
916 jcc(Assembler::notZero, unlock);
917
918 pop(state);
919 if (throw_monitor_exception) {
920 // Entry already unlocked, need to throw exception
921 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
922 call_VM(noreg, CAST_FROM_FN_PTR(address,
923 InterpreterRuntime::throw_illegal_monitor_state_exception));
924 should_not_reach_here();
925 } else {
926 // Monitor already unlocked during a stack unroll. If requested,
927 // install an illegal_monitor_state_exception. Continue with
928 // stack unrolling.
929 if (install_monitor_exception) {
930 NOT_LP64(empty_FPU_stack();)
931 call_VM(noreg, CAST_FROM_FN_PTR(address,
932 InterpreterRuntime::new_illegal_monitor_state_exception));
933 }
934 jmp(unlocked);
935 }
936
937 bind(unlock);
938 unlock_object(robj);
939 pop(state);
940
941 // Check that for block-structured locking (i.e., that all locked
942 // objects has been unlocked)
943 bind(unlocked);
944
945 // rax, rdx: Might contain return value
946
947 // Check that all monitors are unlocked
948 {
949 Label loop, exception, entry, restart;
950 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
951 const Address monitor_block_top(
952 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
953 const Address monitor_block_bot(
954 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
955
956 bind(restart);
957 // We use c_rarg1 so that if we go slow path it will be the correct
958 // register for unlock_object to pass to VM directly
959 movptr(rmon, monitor_block_top); // points to current entry, starting
960 // with top-most entry
961 lea(rbx, monitor_block_bot); // points to word before bottom of
962 // monitor block
963 jmp(entry);
964
965 // Entry already locked, need to throw exception
966 bind(exception);
967
968 if (throw_monitor_exception) {
969 // Throw exception
970 NOT_LP64(empty_FPU_stack();)
971 MacroAssembler::call_VM(noreg,
972 CAST_FROM_FN_PTR(address, InterpreterRuntime::
973 throw_illegal_monitor_state_exception));
974 should_not_reach_here();
975 } else {
976 // Stack unrolling. Unlock object and install illegal_monitor_exception.
977 // Unlock does not block, so don't have to worry about the frame.
978 // We don't have to preserve c_rarg1 since we are going to throw an exception.
979
980 push(state);
981 mov(robj, rmon); // nop if robj and rmon are the same
982 unlock_object(robj);
983 pop(state);
984
985 if (install_monitor_exception) {
986 NOT_LP64(empty_FPU_stack();)
987 call_VM(noreg, CAST_FROM_FN_PTR(address,
988 InterpreterRuntime::
989 new_illegal_monitor_state_exception));
990 }
991
992 jmp(restart);
993 }
994
995 bind(loop);
996 // check if current entry is used
997 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
998 jcc(Assembler::notEqual, exception);
999
1000 addptr(rmon, entry_size); // otherwise advance to next entry
1001 bind(entry);
1002 cmpptr(rmon, rbx); // check if bottom reached
1003 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
1004 }
1005
1006 bind(no_unlock);
1007
1008 // jvmti support
1009 if (notify_jvmdi) {
1010 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
1011 } else {
1012 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
1013 }
1014
1015 // remove activation
1016 // get sender sp
1017 movptr(rbx,
1018 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
1019 leave(); // remove frame anchor
1020 pop(ret_addr); // get return address
1021 mov(rsp, rbx); // set sp to sender sp
1022 }
1023 #endif // !CC_INTERP
1024
1025 void InterpreterMacroAssembler::get_method_counters(Register method,
1026 Register mcs, Label& skip) {
1027 Label has_counters;
1028 movptr(mcs, Address(method, Method::method_counters_offset()));
1029 testptr(mcs, mcs);
1030 jcc(Assembler::notZero, has_counters);
1031 call_VM(noreg, CAST_FROM_FN_PTR(address,
1032 InterpreterRuntime::build_method_counters), method);
1033 movptr(mcs, Address(method,Method::method_counters_offset()));
1034 testptr(mcs, mcs);
1035 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1036 bind(has_counters);
1037 }
1038
1039
1040 // Lock object
1041 //
1042 // Args:
1043 // rdx, c_rarg1: BasicObjectLock to be used for locking
1044 //
1045 // Kills:
1046 // rax, rbx
1047 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1048 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1049 "The argument is only for looks. It must be c_rarg1");
1050
1051 if (UseHeavyMonitors) {
1052 call_VM(noreg,
1053 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1054 lock_reg);
1055 } else {
1056 Label done;
1057
1058 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1059 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a
1060 // problematic case where tmp_reg = no_reg.
1061 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1062
1063 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1064 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1065 const int mark_offset = lock_offset +
1066 BasicLock::displaced_header_offset_in_bytes();
1067
1068 Label slow_case;
1069
1070 // Load object pointer into obj_reg
1071 movptr(obj_reg, Address(lock_reg, obj_offset));
1072
1073 // Need to preemptively evacuate obj because we CAS the mark word later.
1074 oopDesc::bs()->interpreter_write_barrier(this, obj_reg);
1075
1076 if (UseBiasedLocking) {
1077 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case);
1078 }
1079
1080 // Load immediate 1 into swap_reg %rax
1081 movl(swap_reg, (int32_t)1);
1082
1083 // Load (object->mark() | 1) into swap_reg %rax
1084 orptr(swap_reg, Address(obj_reg, 0));
1085
1086 // Save (object->mark() | 1) into BasicLock's displaced header
1087 movptr(Address(lock_reg, mark_offset), swap_reg);
1088
1089 assert(lock_offset == 0,
1090 "displached header must be first word in BasicObjectLock");
1091
1092 if (os::is_MP()) lock();
1093 cmpxchgptr(lock_reg, Address(obj_reg, 0));
1094 if (PrintBiasedLockingStatistics) {
1095 cond_inc32(Assembler::zero,
1096 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1097 }
1098 jcc(Assembler::zero, done);
1099
1100 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1101
1102 // Test if the oopMark is an obvious stack pointer, i.e.,
1103 // 1) (mark & zero_bits) == 0, and
1104 // 2) rsp <= mark < mark + os::pagesize()
1105 //
1106 // These 3 tests can be done by evaluating the following
1107 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1108 // assuming both stack pointer and pagesize have their
1109 // least significant bits clear.
1110 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1111 subptr(swap_reg, rsp);
1112 andptr(swap_reg, zero_bits - os::vm_page_size());
1113
1114 // Save the test result, for recursive case, the result is zero
1115 movptr(Address(lock_reg, mark_offset), swap_reg);
1116
1117 if (PrintBiasedLockingStatistics) {
1118 cond_inc32(Assembler::zero,
1119 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1120 }
1121 jcc(Assembler::zero, done);
1122
1123 bind(slow_case);
1124
1125 // Call the runtime routine for slow case
1126 call_VM(noreg,
1127 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1128 lock_reg);
1129
1130 bind(done);
1131 }
1132 }
1133
1134
1135 // Unlocks an object. Used in monitorexit bytecode and
1136 // remove_activation. Throws an IllegalMonitorException if object is
1137 // not locked by current thread.
1138 //
1139 // Args:
1140 // rdx, c_rarg1: BasicObjectLock for lock
1141 //
1142 // Kills:
1143 // rax
1144 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1145 // rscratch1, rscratch2 (scratch regs)
1146 // rax, rbx, rcx, rdx
1147 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1148 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1149 "The argument is only for looks. It must be c_rarg1");
1150
1151 if (UseHeavyMonitors) {
1152 call_VM(noreg,
1153 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1154 lock_reg);
1155 } else {
1156 Label done;
1157
1158 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1159 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1160 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1161
1162 save_bcp(); // Save in case of exception
1163
1164 // Convert from BasicObjectLock structure to object and BasicLock
1165 // structure Store the BasicLock address into %rax
1166 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1167
1168 // Load oop into obj_reg(%c_rarg3)
1169 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1170
1171 // Need to preemptively evacuate obj because we CAS the mark word later.
1172 oopDesc::bs()->interpreter_write_barrier(this, obj_reg);
1173
1174 // Free entry
1175 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1176
1177 if (UseBiasedLocking) {
1178 biased_locking_exit(obj_reg, header_reg, done);
1179 }
1180
1181 // Load the old header from BasicLock structure
1182 movptr(header_reg, Address(swap_reg,
1183 BasicLock::displaced_header_offset_in_bytes()));
1184
1185 // Test for recursion
1186 testptr(header_reg, header_reg);
1187
1188 // zero for recursive case
1189 jcc(Assembler::zero, done);
1190
1191 // Atomic swap back the old header
1192 if (os::is_MP()) lock();
1193 cmpxchgptr(header_reg, Address(obj_reg, 0));
1194
1195 // zero for recursive case
1196 jcc(Assembler::zero, done);
1197
1198 // Call the runtime routine for slow case.
1199 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1200 obj_reg); // restore obj
1201 call_VM(noreg,
1202 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1203 lock_reg);
1204
1205 bind(done);
1206
1207 restore_bcp();
1208 }
1209 }
1210 #ifndef CC_INTERP
1211 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1212 Label& zero_continue) {
1213 assert(ProfileInterpreter, "must be profiling interpreter");
1214 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1215 testptr(mdp, mdp);
1216 jcc(Assembler::zero, zero_continue);
1217 }
1218
1219
1220 // Set the method data pointer for the current bcp.
1221 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1222 assert(ProfileInterpreter, "must be profiling interpreter");
1223 Label set_mdp;
1224 push(rax);
1225 push(rbx);
1226
1227 get_method(rbx);
1228 // Test MDO to avoid the call if it is NULL.
1229 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1230 testptr(rax, rax);
1231 jcc(Assembler::zero, set_mdp);
1232 // rbx: method
1233 // _bcp_register: bcp
1234 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1235 // rax: mdi
1236 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1237 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1238 addptr(rbx, in_bytes(MethodData::data_offset()));
1239 addptr(rax, rbx);
1240 bind(set_mdp);
1241 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1242 pop(rbx);
1243 pop(rax);
1244 }
1245
1246 void InterpreterMacroAssembler::verify_method_data_pointer() {
1247 assert(ProfileInterpreter, "must be profiling interpreter");
1248 #ifdef ASSERT
1249 Label verify_continue;
1250 push(rax);
1251 push(rbx);
1252 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1253 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1254 push(arg3_reg);
1255 push(arg2_reg);
1256 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1257 get_method(rbx);
1258
1259 // If the mdp is valid, it will point to a DataLayout header which is
1260 // consistent with the bcp. The converse is highly probable also.
1261 load_unsigned_short(arg2_reg,
1262 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1263 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1264 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1265 cmpptr(arg2_reg, _bcp_register);
1266 jcc(Assembler::equal, verify_continue);
1267 // rbx: method
1268 // _bcp_register: bcp
1269 // c_rarg3: mdp
1270 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1271 rbx, _bcp_register, arg3_reg);
1272 bind(verify_continue);
1273 pop(arg2_reg);
1274 pop(arg3_reg);
1275 pop(rbx);
1276 pop(rax);
1277 #endif // ASSERT
1278 }
1279
1280
1281 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1282 int constant,
1283 Register value) {
1284 assert(ProfileInterpreter, "must be profiling interpreter");
1285 Address data(mdp_in, constant);
1286 movptr(data, value);
1287 }
1288
1289
1290 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1291 int constant,
1292 bool decrement) {
1293 // Counter address
1294 Address data(mdp_in, constant);
1295
1296 increment_mdp_data_at(data, decrement);
1297 }
1298
1299 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1300 bool decrement) {
1301 assert(ProfileInterpreter, "must be profiling interpreter");
1302 // %%% this does 64bit counters at best it is wasting space
1303 // at worst it is a rare bug when counters overflow
1304
1305 if (decrement) {
1306 // Decrement the register. Set condition codes.
1307 addptr(data, (int32_t) -DataLayout::counter_increment);
1308 // If the decrement causes the counter to overflow, stay negative
1309 Label L;
1310 jcc(Assembler::negative, L);
1311 addptr(data, (int32_t) DataLayout::counter_increment);
1312 bind(L);
1313 } else {
1314 assert(DataLayout::counter_increment == 1,
1315 "flow-free idiom only works with 1");
1316 // Increment the register. Set carry flag.
1317 addptr(data, DataLayout::counter_increment);
1318 // If the increment causes the counter to overflow, pull back by 1.
1319 sbbptr(data, (int32_t)0);
1320 }
1321 }
1322
1323
1324 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1325 Register reg,
1326 int constant,
1327 bool decrement) {
1328 Address data(mdp_in, reg, Address::times_1, constant);
1329
1330 increment_mdp_data_at(data, decrement);
1331 }
1332
1333 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1334 int flag_byte_constant) {
1335 assert(ProfileInterpreter, "must be profiling interpreter");
1336 int header_offset = in_bytes(DataLayout::header_offset());
1337 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1338 // Set the flag
1339 orl(Address(mdp_in, header_offset), header_bits);
1340 }
1341
1342
1343
1344 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1345 int offset,
1346 Register value,
1347 Register test_value_out,
1348 Label& not_equal_continue) {
1349 assert(ProfileInterpreter, "must be profiling interpreter");
1350 if (test_value_out == noreg) {
1351 cmpptr(value, Address(mdp_in, offset));
1352 } else {
1353 // Put the test value into a register, so caller can use it:
1354 movptr(test_value_out, Address(mdp_in, offset));
1355 cmpptr(test_value_out, value);
1356 }
1357 jcc(Assembler::notEqual, not_equal_continue);
1358 }
1359
1360
1361 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1362 int offset_of_disp) {
1363 assert(ProfileInterpreter, "must be profiling interpreter");
1364 Address disp_address(mdp_in, offset_of_disp);
1365 addptr(mdp_in, disp_address);
1366 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1367 }
1368
1369
1370 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1371 Register reg,
1372 int offset_of_disp) {
1373 assert(ProfileInterpreter, "must be profiling interpreter");
1374 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1375 addptr(mdp_in, disp_address);
1376 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1377 }
1378
1379
1380 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1381 int constant) {
1382 assert(ProfileInterpreter, "must be profiling interpreter");
1383 addptr(mdp_in, constant);
1384 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1385 }
1386
1387
1388 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1389 assert(ProfileInterpreter, "must be profiling interpreter");
1390 push(return_bci); // save/restore across call_VM
1391 call_VM(noreg,
1392 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1393 return_bci);
1394 pop(return_bci);
1395 }
1396
1397
1398 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1399 Register bumped_count) {
1400 if (ProfileInterpreter) {
1401 Label profile_continue;
1402
1403 // If no method data exists, go to profile_continue.
1404 // Otherwise, assign to mdp
1405 test_method_data_pointer(mdp, profile_continue);
1406
1407 // We are taking a branch. Increment the taken count.
1408 // We inline increment_mdp_data_at to return bumped_count in a register
1409 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1410 Address data(mdp, in_bytes(JumpData::taken_offset()));
1411 movptr(bumped_count, data);
1412 assert(DataLayout::counter_increment == 1,
1413 "flow-free idiom only works with 1");
1414 addptr(bumped_count, DataLayout::counter_increment);
1415 sbbptr(bumped_count, 0);
1416 movptr(data, bumped_count); // Store back out
1417
1418 // The method data pointer needs to be updated to reflect the new target.
1419 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1420 bind(profile_continue);
1421 }
1422 }
1423
1424
1425 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1426 if (ProfileInterpreter) {
1427 Label profile_continue;
1428
1429 // If no method data exists, go to profile_continue.
1430 test_method_data_pointer(mdp, profile_continue);
1431
1432 // We are taking a branch. Increment the not taken count.
1433 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1434
1435 // The method data pointer needs to be updated to correspond to
1436 // the next bytecode
1437 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1438 bind(profile_continue);
1439 }
1440 }
1441
1442 void InterpreterMacroAssembler::profile_call(Register mdp) {
1443 if (ProfileInterpreter) {
1444 Label profile_continue;
1445
1446 // If no method data exists, go to profile_continue.
1447 test_method_data_pointer(mdp, profile_continue);
1448
1449 // We are making a call. Increment the count.
1450 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1451
1452 // The method data pointer needs to be updated to reflect the new target.
1453 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1454 bind(profile_continue);
1455 }
1456 }
1457
1458
1459 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1460 if (ProfileInterpreter) {
1461 Label profile_continue;
1462
1463 // If no method data exists, go to profile_continue.
1464 test_method_data_pointer(mdp, profile_continue);
1465
1466 // We are making a call. Increment the count.
1467 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1468
1469 // The method data pointer needs to be updated to reflect the new target.
1470 update_mdp_by_constant(mdp,
1471 in_bytes(VirtualCallData::
1472 virtual_call_data_size()));
1473 bind(profile_continue);
1474 }
1475 }
1476
1477
1478 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1479 Register mdp,
1480 Register reg2,
1481 bool receiver_can_be_null) {
1482 if (ProfileInterpreter) {
1483 Label profile_continue;
1484
1485 // If no method data exists, go to profile_continue.
1486 test_method_data_pointer(mdp, profile_continue);
1487
1488 Label skip_receiver_profile;
1489 if (receiver_can_be_null) {
1490 Label not_null;
1491 testptr(receiver, receiver);
1492 jccb(Assembler::notZero, not_null);
1493 // We are making a call. Increment the count for null receiver.
1494 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1495 jmp(skip_receiver_profile);
1496 bind(not_null);
1497 }
1498
1499 // Record the receiver type.
1500 record_klass_in_profile(receiver, mdp, reg2, true);
1501 bind(skip_receiver_profile);
1502
1503 // The method data pointer needs to be updated to reflect the new target.
1504 update_mdp_by_constant(mdp,
1505 in_bytes(VirtualCallData::
1506 virtual_call_data_size()));
1507 bind(profile_continue);
1508 }
1509 }
1510
1511 // This routine creates a state machine for updating the multi-row
1512 // type profile at a virtual call site (or other type-sensitive bytecode).
1513 // The machine visits each row (of receiver/count) until the receiver type
1514 // is found, or until it runs out of rows. At the same time, it remembers
1515 // the location of the first empty row. (An empty row records null for its
1516 // receiver, and can be allocated for a newly-observed receiver type.)
1517 // Because there are two degrees of freedom in the state, a simple linear
1518 // search will not work; it must be a decision tree. Hence this helper
1519 // function is recursive, to generate the required tree structured code.
1520 // It's the interpreter, so we are trading off code space for speed.
1521 // See below for example code.
1522 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1523 Register receiver, Register mdp,
1524 Register reg2, int start_row,
1525 Label& done, bool is_virtual_call) {
1526 if (TypeProfileWidth == 0) {
1527 if (is_virtual_call) {
1528 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1529 }
1530 return;
1531 }
1532
1533 int last_row = VirtualCallData::row_limit() - 1;
1534 assert(start_row <= last_row, "must be work left to do");
1535 // Test this row for both the receiver and for null.
1536 // Take any of three different outcomes:
1537 // 1. found receiver => increment count and goto done
1538 // 2. found null => keep looking for case 1, maybe allocate this cell
1539 // 3. found something else => keep looking for cases 1 and 2
1540 // Case 3 is handled by a recursive call.
1541 for (int row = start_row; row <= last_row; row++) {
1542 Label next_test;
1543 bool test_for_null_also = (row == start_row);
1544
1545 // See if the receiver is receiver[n].
1546 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1547 test_mdp_data_at(mdp, recvr_offset, receiver,
1548 (test_for_null_also ? reg2 : noreg),
1549 next_test);
1550 // (Reg2 now contains the receiver from the CallData.)
1551
1552 // The receiver is receiver[n]. Increment count[n].
1553 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1554 increment_mdp_data_at(mdp, count_offset);
1555 jmp(done);
1556 bind(next_test);
1557
1558 if (test_for_null_also) {
1559 Label found_null;
1560 // Failed the equality check on receiver[n]... Test for null.
1561 testptr(reg2, reg2);
1562 if (start_row == last_row) {
1563 // The only thing left to do is handle the null case.
1564 if (is_virtual_call) {
1565 jccb(Assembler::zero, found_null);
1566 // Receiver did not match any saved receiver and there is no empty row for it.
1567 // Increment total counter to indicate polymorphic case.
1568 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1569 jmp(done);
1570 bind(found_null);
1571 } else {
1572 jcc(Assembler::notZero, done);
1573 }
1574 break;
1575 }
1576 // Since null is rare, make it be the branch-taken case.
1577 jcc(Assembler::zero, found_null);
1578
1579 // Put all the "Case 3" tests here.
1580 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1581
1582 // Found a null. Keep searching for a matching receiver,
1583 // but remember that this is an empty (unused) slot.
1584 bind(found_null);
1585 }
1586 }
1587
1588 // In the fall-through case, we found no matching receiver, but we
1589 // observed the receiver[start_row] is NULL.
1590
1591 // Fill in the receiver field and increment the count.
1592 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1593 set_mdp_data_at(mdp, recvr_offset, receiver);
1594 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1595 movl(reg2, DataLayout::counter_increment);
1596 set_mdp_data_at(mdp, count_offset, reg2);
1597 if (start_row > 0) {
1598 jmp(done);
1599 }
1600 }
1601
1602 // Example state machine code for three profile rows:
1603 // // main copy of decision tree, rooted at row[1]
1604 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1605 // if (row[0].rec != NULL) {
1606 // // inner copy of decision tree, rooted at row[1]
1607 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1608 // if (row[1].rec != NULL) {
1609 // // degenerate decision tree, rooted at row[2]
1610 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1611 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1612 // row[2].init(rec); goto done;
1613 // } else {
1614 // // remember row[1] is empty
1615 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1616 // row[1].init(rec); goto done;
1617 // }
1618 // } else {
1619 // // remember row[0] is empty
1620 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1621 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1622 // row[0].init(rec); goto done;
1623 // }
1624 // done:
1625
1626 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1627 Register mdp, Register reg2,
1628 bool is_virtual_call) {
1629 assert(ProfileInterpreter, "must be profiling");
1630 Label done;
1631
1632 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1633
1634 bind (done);
1635 }
1636
1637 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1638 Register mdp) {
1639 if (ProfileInterpreter) {
1640 Label profile_continue;
1641 uint row;
1642
1643 // If no method data exists, go to profile_continue.
1644 test_method_data_pointer(mdp, profile_continue);
1645
1646 // Update the total ret count.
1647 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1648
1649 for (row = 0; row < RetData::row_limit(); row++) {
1650 Label next_test;
1651
1652 // See if return_bci is equal to bci[n]:
1653 test_mdp_data_at(mdp,
1654 in_bytes(RetData::bci_offset(row)),
1655 return_bci, noreg,
1656 next_test);
1657
1658 // return_bci is equal to bci[n]. Increment the count.
1659 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1660
1661 // The method data pointer needs to be updated to reflect the new target.
1662 update_mdp_by_offset(mdp,
1663 in_bytes(RetData::bci_displacement_offset(row)));
1664 jmp(profile_continue);
1665 bind(next_test);
1666 }
1667
1668 update_mdp_for_ret(return_bci);
1669
1670 bind(profile_continue);
1671 }
1672 }
1673
1674
1675 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1676 if (ProfileInterpreter) {
1677 Label profile_continue;
1678
1679 // If no method data exists, go to profile_continue.
1680 test_method_data_pointer(mdp, profile_continue);
1681
1682 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1683
1684 // The method data pointer needs to be updated.
1685 int mdp_delta = in_bytes(BitData::bit_data_size());
1686 if (TypeProfileCasts) {
1687 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1688 }
1689 update_mdp_by_constant(mdp, mdp_delta);
1690
1691 bind(profile_continue);
1692 }
1693 }
1694
1695
1696 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1697 if (ProfileInterpreter && TypeProfileCasts) {
1698 Label profile_continue;
1699
1700 // If no method data exists, go to profile_continue.
1701 test_method_data_pointer(mdp, profile_continue);
1702
1703 int count_offset = in_bytes(CounterData::count_offset());
1704 // Back up the address, since we have already bumped the mdp.
1705 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1706
1707 // *Decrement* the counter. We expect to see zero or small negatives.
1708 increment_mdp_data_at(mdp, count_offset, true);
1709
1710 bind (profile_continue);
1711 }
1712 }
1713
1714
1715 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1716 if (ProfileInterpreter) {
1717 Label profile_continue;
1718
1719 // If no method data exists, go to profile_continue.
1720 test_method_data_pointer(mdp, profile_continue);
1721
1722 // The method data pointer needs to be updated.
1723 int mdp_delta = in_bytes(BitData::bit_data_size());
1724 if (TypeProfileCasts) {
1725 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1726
1727 // Record the object type.
1728 record_klass_in_profile(klass, mdp, reg2, false);
1729 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1730 NOT_LP64(restore_locals();) // Restore EDI
1731 }
1732 update_mdp_by_constant(mdp, mdp_delta);
1733
1734 bind(profile_continue);
1735 }
1736 }
1737
1738
1739 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1740 if (ProfileInterpreter) {
1741 Label profile_continue;
1742
1743 // If no method data exists, go to profile_continue.
1744 test_method_data_pointer(mdp, profile_continue);
1745
1746 // Update the default case count
1747 increment_mdp_data_at(mdp,
1748 in_bytes(MultiBranchData::default_count_offset()));
1749
1750 // The method data pointer needs to be updated.
1751 update_mdp_by_offset(mdp,
1752 in_bytes(MultiBranchData::
1753 default_displacement_offset()));
1754
1755 bind(profile_continue);
1756 }
1757 }
1758
1759
1760 void InterpreterMacroAssembler::profile_switch_case(Register index,
1761 Register mdp,
1762 Register reg2) {
1763 if (ProfileInterpreter) {
1764 Label profile_continue;
1765
1766 // If no method data exists, go to profile_continue.
1767 test_method_data_pointer(mdp, profile_continue);
1768
1769 // Build the base (index * per_case_size_in_bytes()) +
1770 // case_array_offset_in_bytes()
1771 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1772 imulptr(index, reg2); // XXX l ?
1773 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1774
1775 // Update the case count
1776 increment_mdp_data_at(mdp,
1777 index,
1778 in_bytes(MultiBranchData::relative_count_offset()));
1779
1780 // The method data pointer needs to be updated.
1781 update_mdp_by_offset(mdp,
1782 index,
1783 in_bytes(MultiBranchData::
1784 relative_displacement_offset()));
1785
1786 bind(profile_continue);
1787 }
1788 }
1789
1790
1791
1792 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1793 if (state == atos) {
1794 MacroAssembler::verify_oop(reg);
1795 }
1796 }
1797
1798 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1799 #ifndef _LP64
1800 if ((state == ftos && UseSSE < 1) ||
1801 (state == dtos && UseSSE < 2)) {
1802 MacroAssembler::verify_FPU(stack_depth);
1803 }
1804 #endif
1805 }
1806
1807 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1808 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1809 int increment, Address mask,
1810 Register scratch, bool preloaded,
1811 Condition cond, Label* where) {
1812 if (!preloaded) {
1813 movl(scratch, counter_addr);
1814 }
1815 incrementl(scratch, increment);
1816 movl(counter_addr, scratch);
1817 andl(scratch, mask);
1818 jcc(cond, *where);
1819 }
1820 #endif // CC_INTERP
1821
1822 void InterpreterMacroAssembler::notify_method_entry() {
1823 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1824 // track stack depth. If it is possible to enter interp_only_mode we add
1825 // the code to check if the event should be sent.
1826 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1827 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1828 if (JvmtiExport::can_post_interpreter_events()) {
1829 Label L;
1830 NOT_LP64(get_thread(rthread);)
1831 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1832 testl(rdx, rdx);
1833 jcc(Assembler::zero, L);
1834 call_VM(noreg, CAST_FROM_FN_PTR(address,
1835 InterpreterRuntime::post_method_entry));
1836 bind(L);
1837 }
1838
1839 {
1840 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1841 NOT_LP64(get_thread(rthread);)
1842 get_method(rarg);
1843 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1844 rthread, rarg);
1845 }
1846
1847 // RedefineClasses() tracing support for obsolete method entry
1848 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1849 NOT_LP64(get_thread(rthread);)
1850 get_method(rarg);
1851 call_VM_leaf(
1852 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1853 rthread, rarg);
1854 }
1855 }
1856
1857
1858 void InterpreterMacroAssembler::notify_method_exit(
1859 TosState state, NotifyMethodExitMode mode) {
1860 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1861 // track stack depth. If it is possible to enter interp_only_mode we add
1862 // the code to check if the event should be sent.
1863 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1864 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1865 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1866 Label L;
1867 // Note: frame::interpreter_frame_result has a dependency on how the
1868 // method result is saved across the call to post_method_exit. If this
1869 // is changed then the interpreter_frame_result implementation will
1870 // need to be updated too.
1871
1872 // For c++ interpreter the result is always stored at a known location in the frame
1873 // template interpreter will leave it on the top of the stack.
1874 NOT_CC_INTERP(push(state);)
1875 NOT_LP64(get_thread(rthread);)
1876 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1877 testl(rdx, rdx);
1878 jcc(Assembler::zero, L);
1879 call_VM(noreg,
1880 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1881 bind(L);
1882 NOT_CC_INTERP(pop(state));
1883 }
1884
1885 {
1886 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1887 NOT_CC_INTERP(push(state));
1888 NOT_LP64(get_thread(rthread);)
1889 get_method(rarg);
1890 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1891 rthread, rarg);
1892 NOT_CC_INTERP(pop(state));
1893 }
1894 }