1 /*
2 * Copyright (c) 1997, 2014, 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 (r13 & r14) pointer
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 esi/edi 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 // 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: movflt(xmm0, val_addr); break;
359 case dtos: movdbl(xmm0, 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: fld_s(val_addr); break;
380 case dtos: fld_d(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 #ifdef _LP64
582 void InterpreterMacroAssembler::pop_i(Register r) {
583 // XXX can't use pop currently, upper half non clean
584 movl(r, Address(rsp, 0));
585 addptr(rsp, wordSize);
586 }
587
588 void InterpreterMacroAssembler::pop_l(Register r) {
589 movq(r, Address(rsp, 0));
590 addptr(rsp, 2 * Interpreter::stackElementSize);
591 }
592
593 void InterpreterMacroAssembler::pop_f(XMMRegister r) {
594 movflt(r, Address(rsp, 0));
595 addptr(rsp, wordSize);
596 }
597
598 void InterpreterMacroAssembler::pop_d(XMMRegister r) {
599 movdbl(r, Address(rsp, 0));
600 addptr(rsp, 2 * Interpreter::stackElementSize);
601 }
602
603 void InterpreterMacroAssembler::push_l(Register r) {
604 subptr(rsp, 2 * wordSize);
605 movq(Address(rsp, 0), r);
606 }
607
608 void InterpreterMacroAssembler::push_f(XMMRegister r) {
609 subptr(rsp, wordSize);
610 movflt(Address(rsp, 0), r);
611 }
612
613 void InterpreterMacroAssembler::push_d(XMMRegister r) {
614 subptr(rsp, 2 * wordSize);
615 movdbl(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(); break;
627 case dtos: pop_d(); 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(); break;
644 case dtos: push_d(); 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: pop_f(); break;
679 case dtos: pop_d(); break;
680 case vtos: /* nothing to do */ break;
681 default : ShouldNotReachHere();
682 }
683 verify_oop(rax, state);
684 }
685
686
687 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
688 push(hi);
689 push(lo);
690 }
691
692 void InterpreterMacroAssembler::push_f() {
693 // Do not schedule for no AGI! Never write beyond rsp!
694 subptr(rsp, 1 * wordSize);
695 fstp_s(Address(rsp, 0));
696 }
697
698 void InterpreterMacroAssembler::push_d(Register r) {
699 // Do not schedule for no AGI! Never write beyond rsp!
700 subptr(rsp, 2 * wordSize);
701 fstp_d(Address(rsp, 0));
702 }
703
704
705 void InterpreterMacroAssembler::push(TosState state) {
706 verify_oop(rax, state);
707 switch (state) {
708 case atos: push_ptr(rax); break;
709 case btos: // fall through
710 case ctos: // fall through
711 case stos: // fall through
712 case itos: push_i(rax); break;
713 case ltos: push_l(rax, rdx); break;
714 case ftos: push_f(); break;
715 case dtos: push_d(rax); break;
716 case vtos: /* nothing to do */ break;
717 default : ShouldNotReachHere();
718 }
719 }
720 #endif // _LP64
721
722
723 // Helpers for swap and dup
724 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
725 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
726 }
727
728 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
729 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
730 }
731
732
733 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
734 // set sender sp
735 lea(_bcp_register, Address(rsp, wordSize));
736 // record last_sp
737 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
738 }
739
740
741 // Jump to from_interpreted entry of a call unless single stepping is possible
742 // in this thread in which case we must call the i2i entry
743 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
744 prepare_to_jump_from_interpreted();
745
746 if (JvmtiExport::can_post_interpreter_events()) {
747 Label run_compiled_code;
748 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
749 // compiled code in threads for which the event is enabled. Check here for
750 // interp_only_mode if these events CAN be enabled.
751 // interp_only is an int, on little endian it is sufficient to test the byte only
752 // Is a cmpl faster?
753 LP64_ONLY(temp = r15_thread;)
754 NOT_LP64(get_thread(temp);)
755 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
756 jccb(Assembler::zero, run_compiled_code);
757 jmp(Address(method, Method::interpreter_entry_offset()));
758 bind(run_compiled_code);
759 }
760
761 jmp(Address(method, Method::from_interpreted_offset()));
762 }
763
764 // The following two routines provide a hook so that an implementation
765 // can schedule the dispatch in two parts. x86 does not do this.
766 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
767 // Nothing x86 specific to be done here
768 }
769
770 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
771 dispatch_next(state, step);
772 }
773
774 void InterpreterMacroAssembler::dispatch_base(TosState state,
775 address* table,
776 bool verifyoop) {
777 verify_FPU(1, state);
778 if (VerifyActivationFrameSize) {
779 Label L;
780 mov(rcx, rbp);
781 subptr(rcx, rsp);
782 int32_t min_frame_size =
783 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
784 wordSize;
785 cmpptr(rcx, (int32_t)min_frame_size);
786 jcc(Assembler::greaterEqual, L);
787 stop("broken stack frame");
788 bind(L);
789 }
790 if (verifyoop) {
791 verify_oop(rax, state);
792 }
793 #ifdef _LP64
794 lea(rscratch1, ExternalAddress((address)table));
795 jmp(Address(rscratch1, rbx, Address::times_8));
796 #else
797 Address index(noreg, rbx, Address::times_ptr);
798 ExternalAddress tbl((address)table);
799 ArrayAddress dispatch(tbl, index);
800 jump(dispatch);
801 #endif // _LP64
802 }
803
804 void InterpreterMacroAssembler::dispatch_only(TosState state) {
805 dispatch_base(state, Interpreter::dispatch_table(state));
806 }
807
808 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
809 dispatch_base(state, Interpreter::normal_table(state));
810 }
811
812 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
813 dispatch_base(state, Interpreter::normal_table(state), false);
814 }
815
816
817 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
818 // load next bytecode (load before advancing _bcp_register to prevent AGI)
819 load_unsigned_byte(rbx, Address(_bcp_register, step));
820 // advance _bcp_register
821 increment(_bcp_register, step);
822 dispatch_base(state, Interpreter::dispatch_table(state));
823 }
824
825 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
826 // load current bytecode
827 load_unsigned_byte(rbx, Address(_bcp_register, 0));
828 dispatch_base(state, table);
829 }
830
831 // remove activation
832 //
833 // Unlock the receiver if this is a synchronized method.
834 // Unlock any Java monitors from syncronized blocks.
835 // Remove the activation from the stack.
836 //
837 // If there are locked Java monitors
838 // If throw_monitor_exception
839 // throws IllegalMonitorStateException
840 // Else if install_monitor_exception
841 // installs IllegalMonitorStateException
842 // Else
843 // no error processing
844 void InterpreterMacroAssembler::remove_activation(
845 TosState state,
846 Register ret_addr,
847 bool throw_monitor_exception,
848 bool install_monitor_exception,
849 bool notify_jvmdi) {
850 // Note: Registers rdx xmm0 may be in use for the
851 // result check if synchronized method
852 Label unlocked, unlock, no_unlock;
853
854 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
855 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
856 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
857 // monitor pointers need different register
858 // because rdx may have the result in it
859 NOT_LP64(get_thread(rcx);)
860
861 // get the value of _do_not_unlock_if_synchronized into rdx
862 const Address do_not_unlock_if_synchronized(rthread,
863 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
864 movbool(rbx, do_not_unlock_if_synchronized);
865 movbool(do_not_unlock_if_synchronized, false); // reset the flag
866
867 // get method access flags
868 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
869 movl(rcx, Address(rcx, Method::access_flags_offset()));
870 testl(rcx, JVM_ACC_SYNCHRONIZED);
871 jcc(Assembler::zero, unlocked);
872
873 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
874 // is set.
875 testbool(rbx);
876 jcc(Assembler::notZero, no_unlock);
877
878 // unlock monitor
879 push(state); // save result
880
881 // BasicObjectLock will be first in list, since this is a
882 // synchronized method. However, need to check that the object has
883 // not been unlocked by an explicit monitorexit bytecode.
884 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset *
885 wordSize - (int) sizeof(BasicObjectLock));
886 // We use c_rarg1/rdx so that if we go slow path it will be the correct
887 // register for unlock_object to pass to VM directly
888 lea(robj, monitor); // address of first monitor
889
890 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
891 testptr(rax, rax);
892 jcc(Assembler::notZero, unlock);
893
894 pop(state);
895 if (throw_monitor_exception) {
896 // Entry already unlocked, need to throw exception
897 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
898 call_VM(noreg, CAST_FROM_FN_PTR(address,
899 InterpreterRuntime::throw_illegal_monitor_state_exception));
900 should_not_reach_here();
901 } else {
902 // Monitor already unlocked during a stack unroll. If requested,
903 // install an illegal_monitor_state_exception. Continue with
904 // stack unrolling.
905 if (install_monitor_exception) {
906 NOT_LP64(empty_FPU_stack();)
907 call_VM(noreg, CAST_FROM_FN_PTR(address,
908 InterpreterRuntime::new_illegal_monitor_state_exception));
909 }
910 jmp(unlocked);
911 }
912
913 bind(unlock);
914 unlock_object(robj);
915 pop(state);
916
917 // Check that for block-structured locking (i.e., that all locked
918 // objects has been unlocked)
919 bind(unlocked);
920
921 // rax, rdx: Might contain return value
922
923 // Check that all monitors are unlocked
924 {
925 Label loop, exception, entry, restart;
926 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
927 const Address monitor_block_top(
928 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
929 const Address monitor_block_bot(
930 rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
931
932 bind(restart);
933 // We use c_rarg1 so that if we go slow path it will be the correct
934 // register for unlock_object to pass to VM directly
935 movptr(rmon, monitor_block_top); // points to current entry, starting
936 // with top-most entry
937 lea(rbx, monitor_block_bot); // points to word before bottom of
938 // monitor block
939 jmp(entry);
940
941 // Entry already locked, need to throw exception
942 bind(exception);
943
944 if (throw_monitor_exception) {
945 // Throw exception
946 NOT_LP64(empty_FPU_stack();)
947 MacroAssembler::call_VM(noreg,
948 CAST_FROM_FN_PTR(address, InterpreterRuntime::
949 throw_illegal_monitor_state_exception));
950 should_not_reach_here();
951 } else {
952 // Stack unrolling. Unlock object and install illegal_monitor_exception.
953 // Unlock does not block, so don't have to worry about the frame.
954 // We don't have to preserve c_rarg1 since we are going to throw an exception.
955
956 push(state);
957 mov(robj, rmon); // nop if robj and rmon are the same
958 unlock_object(robj);
959 pop(state);
960
961 if (install_monitor_exception) {
962 NOT_LP64(empty_FPU_stack();)
963 call_VM(noreg, CAST_FROM_FN_PTR(address,
964 InterpreterRuntime::
965 new_illegal_monitor_state_exception));
966 }
967
968 jmp(restart);
969 }
970
971 bind(loop);
972 // check if current entry is used
973 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
974 jcc(Assembler::notEqual, exception);
975
976 addptr(rmon, entry_size); // otherwise advance to next entry
977 bind(entry);
978 cmpptr(rmon, rbx); // check if bottom reached
979 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
980 }
981
982 bind(no_unlock);
983
984 // jvmti support
985 if (notify_jvmdi) {
986 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
987 } else {
988 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
989 }
990
991 // remove activation
992 // get sender sp
993 movptr(rbx,
994 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
995 leave(); // remove frame anchor
996 pop(ret_addr); // get return address
997 mov(rsp, rbx); // set sp to sender sp
998 #ifndef _LP64
999 if (UseSSE) {
1000 // float and double are returned in xmm register in SSE-mode
1001 if (state == ftos && UseSSE >= 1) {
1002 subptr(rsp, wordSize);
1003 fstp_s(Address(rsp, 0));
1004 movflt(xmm0, Address(rsp, 0));
1005 addptr(rsp, wordSize);
1006 } else if (state == dtos && UseSSE >= 2) {
1007 subptr(rsp, 2*wordSize);
1008 fstp_d(Address(rsp, 0));
1009 movdbl(xmm0, Address(rsp, 0));
1010 addptr(rsp, 2*wordSize);
1011 }
1012 }
1013 #endif // _LP64
1014 }
1015 #endif /* !CC_INTERP */
1016
1017 void InterpreterMacroAssembler::get_method_counters(Register method,
1018 Register mcs, Label& skip) {
1019 Label has_counters;
1020 movptr(mcs, Address(method, Method::method_counters_offset()));
1021 testptr(mcs, mcs);
1022 jcc(Assembler::notZero, has_counters);
1023 call_VM(noreg, CAST_FROM_FN_PTR(address,
1024 InterpreterRuntime::build_method_counters), method);
1025 movptr(mcs, Address(method,Method::method_counters_offset()));
1026 testptr(mcs, mcs);
1027 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
1028 bind(has_counters);
1029 }
1030
1031
1032 // Lock object
1033 //
1034 // Args:
1035 // rdx, c_rarg1: BasicObjectLock to be used for locking
1036 //
1037 // Kills:
1038 // rax
1039 // rscratch1 (scratch regs)
1040 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
1041 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1042 "The argument is only for looks. It must be c_rarg1");
1043
1044 if (UseHeavyMonitors) {
1045 call_VM(noreg,
1046 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1047 lock_reg);
1048 } else {
1049 Label done;
1050
1051 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1052 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1053
1054 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
1055 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
1056 const int mark_offset = lock_offset +
1057 BasicLock::displaced_header_offset_in_bytes();
1058
1059 Label slow_case;
1060
1061 // Load object pointer into obj_reg
1062 movptr(obj_reg, Address(lock_reg, obj_offset));
1063
1064 if (UseBiasedLocking) {
1065 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case);
1066 }
1067
1068 // Load immediate 1 into swap_reg %rax
1069 movl(swap_reg, (int32_t)1);
1070
1071 // Load (object->mark() | 1) into swap_reg %rax
1072 orptr(swap_reg, Address(obj_reg, 0));
1073
1074 // Save (object->mark() | 1) into BasicLock's displaced header
1075 movptr(Address(lock_reg, mark_offset), swap_reg);
1076
1077 assert(lock_offset == 0,
1078 "displached header must be first word in BasicObjectLock");
1079
1080 if (os::is_MP()) lock();
1081 cmpxchgptr(lock_reg, Address(obj_reg, 0));
1082 if (PrintBiasedLockingStatistics) {
1083 cond_inc32(Assembler::zero,
1084 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1085 }
1086 jcc(Assembler::zero, done);
1087
1088 const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
1089
1090 // Test if the oopMark is an obvious stack pointer, i.e.,
1091 // 1) (mark & zero_bits) == 0, and
1092 // 2) rsp <= mark < mark + os::pagesize()
1093 //
1094 // These 3 tests can be done by evaluating the following
1095 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
1096 // assuming both stack pointer and pagesize have their
1097 // least significant bits clear.
1098 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
1099 subptr(swap_reg, rsp);
1100 andptr(swap_reg, zero_bits - os::vm_page_size());
1101
1102 // Save the test result, for recursive case, the result is zero
1103 movptr(Address(lock_reg, mark_offset), swap_reg);
1104
1105 if (PrintBiasedLockingStatistics) {
1106 cond_inc32(Assembler::zero,
1107 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
1108 }
1109 jcc(Assembler::zero, done);
1110
1111 bind(slow_case);
1112
1113 // Call the runtime routine for slow case
1114 call_VM(noreg,
1115 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
1116 lock_reg);
1117
1118 bind(done);
1119 }
1120 }
1121
1122
1123 // Unlocks an object. Used in monitorexit bytecode and
1124 // remove_activation. Throws an IllegalMonitorException if object is
1125 // not locked by current thread.
1126 //
1127 // Args:
1128 // rdx, c_rarg1: BasicObjectLock for lock
1129 //
1130 // Kills:
1131 // rax
1132 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
1133 // rscratch1, rscratch2 (scratch regs)
1134 // rax, rbx, rcx, rdx
1135 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1136 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
1137 "The argument is only for looks. It must be c_rarg1");
1138
1139 if (UseHeavyMonitors) {
1140 call_VM(noreg,
1141 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1142 lock_reg);
1143 } else {
1144 Label done;
1145
1146 const Register swap_reg = rax; // Must use rax for cmpxchg instruction
1147 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
1148 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
1149
1150 save_bcp(); // Save in case of exception
1151
1152 // Convert from BasicObjectLock structure to object and BasicLock
1153 // structure Store the BasicLock address into %rax
1154 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
1155
1156 // Load oop into obj_reg(%c_rarg3)
1157 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
1158
1159 // Free entry
1160 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
1161
1162 if (UseBiasedLocking) {
1163 biased_locking_exit(obj_reg, header_reg, done);
1164 }
1165
1166 // Load the old header from BasicLock structure
1167 movptr(header_reg, Address(swap_reg,
1168 BasicLock::displaced_header_offset_in_bytes()));
1169
1170 // Test for recursion
1171 testptr(header_reg, header_reg);
1172
1173 // zero for recursive case
1174 jcc(Assembler::zero, done);
1175
1176 // Atomic swap back the old header
1177 if (os::is_MP()) lock();
1178 cmpxchgptr(header_reg, Address(obj_reg, 0));
1179
1180 // zero for recursive case
1181 jcc(Assembler::zero, done);
1182
1183 // Call the runtime routine for slow case.
1184 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
1185 obj_reg); // restore obj
1186 call_VM(noreg,
1187 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
1188 lock_reg);
1189
1190 bind(done);
1191
1192 restore_bcp();
1193 }
1194 }
1195 #ifndef CC_INTERP
1196 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
1197 Label& zero_continue) {
1198 assert(ProfileInterpreter, "must be profiling interpreter");
1199 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
1200 testptr(mdp, mdp);
1201 jcc(Assembler::zero, zero_continue);
1202 }
1203
1204
1205 // Set the method data pointer for the current bcp.
1206 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1207 assert(ProfileInterpreter, "must be profiling interpreter");
1208 Label set_mdp;
1209 push(rax);
1210 push(rbx);
1211
1212 get_method(rbx);
1213 // Test MDO to avoid the call if it is NULL.
1214 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
1215 testptr(rax, rax);
1216 jcc(Assembler::zero, set_mdp);
1217 // rbx: method
1218 // _bcp_register: bcp
1219 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
1220 // rax: mdi
1221 // mdo is guaranteed to be non-zero here, we checked for it before the call.
1222 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
1223 addptr(rbx, in_bytes(MethodData::data_offset()));
1224 addptr(rax, rbx);
1225 bind(set_mdp);
1226 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
1227 pop(rbx);
1228 pop(rax);
1229 }
1230
1231 void InterpreterMacroAssembler::verify_method_data_pointer() {
1232 assert(ProfileInterpreter, "must be profiling interpreter");
1233 #ifdef ASSERT
1234 Label verify_continue;
1235 push(rax);
1236 push(rbx);
1237 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
1238 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
1239 push(arg3_reg);
1240 push(arg2_reg);
1241 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
1242 get_method(rbx);
1243
1244 // If the mdp is valid, it will point to a DataLayout header which is
1245 // consistent with the bcp. The converse is highly probable also.
1246 load_unsigned_short(arg2_reg,
1247 Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
1248 addptr(arg2_reg, Address(rbx, Method::const_offset()));
1249 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
1250 cmpptr(arg2_reg, _bcp_register);
1251 jcc(Assembler::equal, verify_continue);
1252 // rbx: method
1253 // _bcp_register: bcp
1254 // c_rarg3: mdp
1255 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
1256 rbx, _bcp_register, arg3_reg);
1257 bind(verify_continue);
1258 pop(arg2_reg);
1259 pop(arg3_reg);
1260 pop(rbx);
1261 pop(rax);
1262 #endif // ASSERT
1263 }
1264
1265
1266 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
1267 int constant,
1268 Register value) {
1269 assert(ProfileInterpreter, "must be profiling interpreter");
1270 Address data(mdp_in, constant);
1271 movptr(data, value);
1272 }
1273
1274
1275 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1276 int constant,
1277 bool decrement) {
1278 // Counter address
1279 Address data(mdp_in, constant);
1280
1281 increment_mdp_data_at(data, decrement);
1282 }
1283
1284 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
1285 bool decrement) {
1286 assert(ProfileInterpreter, "must be profiling interpreter");
1287 // %%% this does 64bit counters at best it is wasting space
1288 // at worst it is a rare bug when counters overflow
1289
1290 if (decrement) {
1291 // Decrement the register. Set condition codes.
1292 addptr(data, (int32_t) -DataLayout::counter_increment);
1293 // If the decrement causes the counter to overflow, stay negative
1294 Label L;
1295 jcc(Assembler::negative, L);
1296 addptr(data, (int32_t) DataLayout::counter_increment);
1297 bind(L);
1298 } else {
1299 assert(DataLayout::counter_increment == 1,
1300 "flow-free idiom only works with 1");
1301 // Increment the register. Set carry flag.
1302 addptr(data, DataLayout::counter_increment);
1303 // If the increment causes the counter to overflow, pull back by 1.
1304 sbbptr(data, (int32_t)0);
1305 }
1306 }
1307
1308
1309 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
1310 Register reg,
1311 int constant,
1312 bool decrement) {
1313 Address data(mdp_in, reg, Address::times_1, constant);
1314
1315 increment_mdp_data_at(data, decrement);
1316 }
1317
1318 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
1319 int flag_byte_constant) {
1320 assert(ProfileInterpreter, "must be profiling interpreter");
1321 int header_offset = in_bytes(DataLayout::header_offset());
1322 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
1323 // Set the flag
1324 orl(Address(mdp_in, header_offset), header_bits);
1325 }
1326
1327
1328
1329 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
1330 int offset,
1331 Register value,
1332 Register test_value_out,
1333 Label& not_equal_continue) {
1334 assert(ProfileInterpreter, "must be profiling interpreter");
1335 if (test_value_out == noreg) {
1336 cmpptr(value, Address(mdp_in, offset));
1337 } else {
1338 // Put the test value into a register, so caller can use it:
1339 movptr(test_value_out, Address(mdp_in, offset));
1340 cmpptr(test_value_out, value);
1341 }
1342 jcc(Assembler::notEqual, not_equal_continue);
1343 }
1344
1345
1346 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1347 int offset_of_disp) {
1348 assert(ProfileInterpreter, "must be profiling interpreter");
1349 Address disp_address(mdp_in, offset_of_disp);
1350 addptr(mdp_in, disp_address);
1351 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1352 }
1353
1354
1355 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
1356 Register reg,
1357 int offset_of_disp) {
1358 assert(ProfileInterpreter, "must be profiling interpreter");
1359 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
1360 addptr(mdp_in, disp_address);
1361 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1362 }
1363
1364
1365 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
1366 int constant) {
1367 assert(ProfileInterpreter, "must be profiling interpreter");
1368 addptr(mdp_in, constant);
1369 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
1370 }
1371
1372
1373 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
1374 assert(ProfileInterpreter, "must be profiling interpreter");
1375 push(return_bci); // save/restore across call_VM
1376 call_VM(noreg,
1377 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
1378 return_bci);
1379 pop(return_bci);
1380 }
1381
1382
1383 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
1384 Register bumped_count) {
1385 if (ProfileInterpreter) {
1386 Label profile_continue;
1387
1388 // If no method data exists, go to profile_continue.
1389 // Otherwise, assign to mdp
1390 test_method_data_pointer(mdp, profile_continue);
1391
1392 // We are taking a branch. Increment the taken count.
1393 // We inline increment_mdp_data_at to return bumped_count in a register
1394 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1395 Address data(mdp, in_bytes(JumpData::taken_offset()));
1396 movptr(bumped_count, data);
1397 assert(DataLayout::counter_increment == 1,
1398 "flow-free idiom only works with 1");
1399 addptr(bumped_count, DataLayout::counter_increment);
1400 sbbptr(bumped_count, 0);
1401 movptr(data, bumped_count); // Store back out
1402
1403 // The method data pointer needs to be updated to reflect the new target.
1404 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1405 bind(profile_continue);
1406 }
1407 }
1408
1409
1410 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1411 if (ProfileInterpreter) {
1412 Label profile_continue;
1413
1414 // If no method data exists, go to profile_continue.
1415 test_method_data_pointer(mdp, profile_continue);
1416
1417 // We are taking a branch. Increment the not taken count.
1418 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1419
1420 // The method data pointer needs to be updated to correspond to
1421 // the next bytecode
1422 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1423 bind(profile_continue);
1424 }
1425 }
1426
1427 void InterpreterMacroAssembler::profile_call(Register mdp) {
1428 if (ProfileInterpreter) {
1429 Label profile_continue;
1430
1431 // If no method data exists, go to profile_continue.
1432 test_method_data_pointer(mdp, profile_continue);
1433
1434 // We are making a call. Increment the count.
1435 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1436
1437 // The method data pointer needs to be updated to reflect the new target.
1438 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1439 bind(profile_continue);
1440 }
1441 }
1442
1443
1444 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1445 if (ProfileInterpreter) {
1446 Label profile_continue;
1447
1448 // If no method data exists, go to profile_continue.
1449 test_method_data_pointer(mdp, profile_continue);
1450
1451 // We are making a call. Increment the count.
1452 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1453
1454 // The method data pointer needs to be updated to reflect the new target.
1455 update_mdp_by_constant(mdp,
1456 in_bytes(VirtualCallData::
1457 virtual_call_data_size()));
1458 bind(profile_continue);
1459 }
1460 }
1461
1462
1463 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1464 Register mdp,
1465 Register reg2,
1466 bool receiver_can_be_null) {
1467 if (ProfileInterpreter) {
1468 Label profile_continue;
1469
1470 // If no method data exists, go to profile_continue.
1471 test_method_data_pointer(mdp, profile_continue);
1472
1473 Label skip_receiver_profile;
1474 if (receiver_can_be_null) {
1475 Label not_null;
1476 testptr(receiver, receiver);
1477 jccb(Assembler::notZero, not_null);
1478 // We are making a call. Increment the count for null receiver.
1479 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1480 jmp(skip_receiver_profile);
1481 bind(not_null);
1482 }
1483
1484 // Record the receiver type.
1485 record_klass_in_profile(receiver, mdp, reg2, true);
1486 bind(skip_receiver_profile);
1487
1488 // The method data pointer needs to be updated to reflect the new target.
1489 update_mdp_by_constant(mdp,
1490 in_bytes(VirtualCallData::
1491 virtual_call_data_size()));
1492 bind(profile_continue);
1493 }
1494 }
1495
1496 // This routine creates a state machine for updating the multi-row
1497 // type profile at a virtual call site (or other type-sensitive bytecode).
1498 // The machine visits each row (of receiver/count) until the receiver type
1499 // is found, or until it runs out of rows. At the same time, it remembers
1500 // the location of the first empty row. (An empty row records null for its
1501 // receiver, and can be allocated for a newly-observed receiver type.)
1502 // Because there are two degrees of freedom in the state, a simple linear
1503 // search will not work; it must be a decision tree. Hence this helper
1504 // function is recursive, to generate the required tree structured code.
1505 // It's the interpreter, so we are trading off code space for speed.
1506 // See below for example code.
1507 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1508 Register receiver, Register mdp,
1509 Register reg2, int start_row,
1510 Label& done, bool is_virtual_call) {
1511 if (TypeProfileWidth == 0) {
1512 if (is_virtual_call) {
1513 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1514 }
1515 return;
1516 }
1517
1518 int last_row = VirtualCallData::row_limit() - 1;
1519 assert(start_row <= last_row, "must be work left to do");
1520 // Test this row for both the receiver and for null.
1521 // Take any of three different outcomes:
1522 // 1. found receiver => increment count and goto done
1523 // 2. found null => keep looking for case 1, maybe allocate this cell
1524 // 3. found something else => keep looking for cases 1 and 2
1525 // Case 3 is handled by a recursive call.
1526 for (int row = start_row; row <= last_row; row++) {
1527 Label next_test;
1528 bool test_for_null_also = (row == start_row);
1529
1530 // See if the receiver is receiver[n].
1531 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1532 test_mdp_data_at(mdp, recvr_offset, receiver,
1533 (test_for_null_also ? reg2 : noreg),
1534 next_test);
1535 // (Reg2 now contains the receiver from the CallData.)
1536
1537 // The receiver is receiver[n]. Increment count[n].
1538 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1539 increment_mdp_data_at(mdp, count_offset);
1540 jmp(done);
1541 bind(next_test);
1542
1543 if (test_for_null_also) {
1544 Label found_null;
1545 // Failed the equality check on receiver[n]... Test for null.
1546 testptr(reg2, reg2);
1547 if (start_row == last_row) {
1548 // The only thing left to do is handle the null case.
1549 if (is_virtual_call) {
1550 jccb(Assembler::zero, found_null);
1551 // Receiver did not match any saved receiver and there is no empty row for it.
1552 // Increment total counter to indicate polymorphic case.
1553 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1554 jmp(done);
1555 bind(found_null);
1556 } else {
1557 jcc(Assembler::notZero, done);
1558 }
1559 break;
1560 }
1561 // Since null is rare, make it be the branch-taken case.
1562 jcc(Assembler::zero, found_null);
1563
1564 // Put all the "Case 3" tests here.
1565 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1566
1567 // Found a null. Keep searching for a matching receiver,
1568 // but remember that this is an empty (unused) slot.
1569 bind(found_null);
1570 }
1571 }
1572
1573 // In the fall-through case, we found no matching receiver, but we
1574 // observed the receiver[start_row] is NULL.
1575
1576 // Fill in the receiver field and increment the count.
1577 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1578 set_mdp_data_at(mdp, recvr_offset, receiver);
1579 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1580 movl(reg2, DataLayout::counter_increment);
1581 set_mdp_data_at(mdp, count_offset, reg2);
1582 if (start_row > 0) {
1583 jmp(done);
1584 }
1585 }
1586
1587 // Example state machine code for three profile rows:
1588 // // main copy of decision tree, rooted at row[1]
1589 // if (row[0].rec == rec) { row[0].incr(); goto done; }
1590 // if (row[0].rec != NULL) {
1591 // // inner copy of decision tree, rooted at row[1]
1592 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1593 // if (row[1].rec != NULL) {
1594 // // degenerate decision tree, rooted at row[2]
1595 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1596 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
1597 // row[2].init(rec); goto done;
1598 // } else {
1599 // // remember row[1] is empty
1600 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1601 // row[1].init(rec); goto done;
1602 // }
1603 // } else {
1604 // // remember row[0] is empty
1605 // if (row[1].rec == rec) { row[1].incr(); goto done; }
1606 // if (row[2].rec == rec) { row[2].incr(); goto done; }
1607 // row[0].init(rec); goto done;
1608 // }
1609 // done:
1610
1611 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1612 Register mdp, Register reg2,
1613 bool is_virtual_call) {
1614 assert(ProfileInterpreter, "must be profiling");
1615 Label done;
1616
1617 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1618
1619 bind (done);
1620 }
1621
1622 void InterpreterMacroAssembler::profile_ret(Register return_bci,
1623 Register mdp) {
1624 if (ProfileInterpreter) {
1625 Label profile_continue;
1626 uint row;
1627
1628 // If no method data exists, go to profile_continue.
1629 test_method_data_pointer(mdp, profile_continue);
1630
1631 // Update the total ret count.
1632 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1633
1634 for (row = 0; row < RetData::row_limit(); row++) {
1635 Label next_test;
1636
1637 // See if return_bci is equal to bci[n]:
1638 test_mdp_data_at(mdp,
1639 in_bytes(RetData::bci_offset(row)),
1640 return_bci, noreg,
1641 next_test);
1642
1643 // return_bci is equal to bci[n]. Increment the count.
1644 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1645
1646 // The method data pointer needs to be updated to reflect the new target.
1647 update_mdp_by_offset(mdp,
1648 in_bytes(RetData::bci_displacement_offset(row)));
1649 jmp(profile_continue);
1650 bind(next_test);
1651 }
1652
1653 update_mdp_for_ret(return_bci);
1654
1655 bind(profile_continue);
1656 }
1657 }
1658
1659
1660 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1661 if (ProfileInterpreter) {
1662 Label profile_continue;
1663
1664 // If no method data exists, go to profile_continue.
1665 test_method_data_pointer(mdp, profile_continue);
1666
1667 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1668
1669 // The method data pointer needs to be updated.
1670 int mdp_delta = in_bytes(BitData::bit_data_size());
1671 if (TypeProfileCasts) {
1672 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1673 }
1674 update_mdp_by_constant(mdp, mdp_delta);
1675
1676 bind(profile_continue);
1677 }
1678 }
1679
1680
1681 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1682 if (ProfileInterpreter && TypeProfileCasts) {
1683 Label profile_continue;
1684
1685 // If no method data exists, go to profile_continue.
1686 test_method_data_pointer(mdp, profile_continue);
1687
1688 int count_offset = in_bytes(CounterData::count_offset());
1689 // Back up the address, since we have already bumped the mdp.
1690 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1691
1692 // *Decrement* the counter. We expect to see zero or small negatives.
1693 increment_mdp_data_at(mdp, count_offset, true);
1694
1695 bind (profile_continue);
1696 }
1697 }
1698
1699
1700 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
1701 if (ProfileInterpreter) {
1702 Label profile_continue;
1703
1704 // If no method data exists, go to profile_continue.
1705 test_method_data_pointer(mdp, profile_continue);
1706
1707 // The method data pointer needs to be updated.
1708 int mdp_delta = in_bytes(BitData::bit_data_size());
1709 if (TypeProfileCasts) {
1710 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1711
1712 // Record the object type.
1713 record_klass_in_profile(klass, mdp, reg2, false);
1714 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
1715 NOT_LP64(restore_locals();) // Restore EDI
1716 }
1717 update_mdp_by_constant(mdp, mdp_delta);
1718
1719 bind(profile_continue);
1720 }
1721 }
1722
1723
1724 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1725 if (ProfileInterpreter) {
1726 Label profile_continue;
1727
1728 // If no method data exists, go to profile_continue.
1729 test_method_data_pointer(mdp, profile_continue);
1730
1731 // Update the default case count
1732 increment_mdp_data_at(mdp,
1733 in_bytes(MultiBranchData::default_count_offset()));
1734
1735 // The method data pointer needs to be updated.
1736 update_mdp_by_offset(mdp,
1737 in_bytes(MultiBranchData::
1738 default_displacement_offset()));
1739
1740 bind(profile_continue);
1741 }
1742 }
1743
1744
1745 void InterpreterMacroAssembler::profile_switch_case(Register index,
1746 Register mdp,
1747 Register reg2) {
1748 if (ProfileInterpreter) {
1749 Label profile_continue;
1750
1751 // If no method data exists, go to profile_continue.
1752 test_method_data_pointer(mdp, profile_continue);
1753
1754 // Build the base (index * per_case_size_in_bytes()) +
1755 // case_array_offset_in_bytes()
1756 movl(reg2, in_bytes(MultiBranchData::per_case_size()));
1757 imulptr(index, reg2); // XXX l ?
1758 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
1759
1760 // Update the case count
1761 increment_mdp_data_at(mdp,
1762 index,
1763 in_bytes(MultiBranchData::relative_count_offset()));
1764
1765 // The method data pointer needs to be updated.
1766 update_mdp_by_offset(mdp,
1767 index,
1768 in_bytes(MultiBranchData::
1769 relative_displacement_offset()));
1770
1771 bind(profile_continue);
1772 }
1773 }
1774
1775
1776
1777 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1778 if (state == atos) {
1779 MacroAssembler::verify_oop(reg);
1780 }
1781 }
1782
1783 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1784 #ifndef _LP64
1785 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1786 #endif
1787 }
1788
1789 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1790 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1791 int increment, Address mask,
1792 Register scratch, bool preloaded,
1793 Condition cond, Label* where) {
1794 if (!preloaded) {
1795 movl(scratch, counter_addr);
1796 }
1797 incrementl(scratch, increment);
1798 movl(counter_addr, scratch);
1799 andl(scratch, mask);
1800 jcc(cond, *where);
1801 }
1802 #endif /* CC_INTERP */
1803
1804 void InterpreterMacroAssembler::notify_method_entry() {
1805 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1806 // track stack depth. If it is possible to enter interp_only_mode we add
1807 // the code to check if the event should be sent.
1808 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1809 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1810 if (JvmtiExport::can_post_interpreter_events()) {
1811 Label L;
1812 NOT_LP64(get_thread(rthread);)
1813 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1814 testl(rdx, rdx);
1815 jcc(Assembler::zero, L);
1816 call_VM(noreg, CAST_FROM_FN_PTR(address,
1817 InterpreterRuntime::post_method_entry));
1818 bind(L);
1819 }
1820
1821 {
1822 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1823 NOT_LP64(get_thread(rthread);)
1824 get_method(rarg);
1825 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
1826 rthread, rarg);
1827 }
1828
1829 // RedefineClasses() tracing support for obsolete method entry
1830 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1831 NOT_LP64(get_thread(rthread);)
1832 get_method(rarg);
1833 call_VM_leaf(
1834 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1835 rthread, rarg);
1836 }
1837 }
1838
1839
1840 void InterpreterMacroAssembler::notify_method_exit(
1841 TosState state, NotifyMethodExitMode mode) {
1842 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1843 // track stack depth. If it is possible to enter interp_only_mode we add
1844 // the code to check if the event should be sent.
1845 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
1846 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
1847 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1848 Label L;
1849 // Note: frame::interpreter_frame_result has a dependency on how the
1850 // method result is saved across the call to post_method_exit. If this
1851 // is changed then the interpreter_frame_result implementation will
1852 // need to be updated too.
1853
1854 // For c++ interpreter the result is always stored at a known location in the frame
1855 // template interpreter will leave it on the top of the stack.
1856 NOT_CC_INTERP(push(state);)
1857 get_thread(rthread);
1858 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
1859 testl(rdx, rdx);
1860 jcc(Assembler::zero, L);
1861 call_VM(noreg,
1862 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1863 bind(L);
1864 NOT_CC_INTERP(pop(state));
1865 }
1866
1867 {
1868 SkipIfEqual skip(this, &DTraceMethodProbes, false);
1869 NOT_CC_INTERP(push(state));
1870 get_thread(rthread);
1871 get_method(rarg);
1872 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1873 rthread, rarg);
1874 NOT_CC_INTERP(pop(state));
1875 }
1876 }