1 /*
2 * Copyright (c) 1997, 2013, 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_32.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
42 // Implementation of InterpreterMacroAssembler
43 #ifdef CC_INTERP
44 void InterpreterMacroAssembler::get_method(Register reg) {
45 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
46 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
47 }
48 #endif // CC_INTERP
49
50
51 #ifndef CC_INTERP
52 void InterpreterMacroAssembler::call_VM_leaf_base(
53 address entry_point,
54 int number_of_arguments
55 ) {
56 // interpreter specific
57 //
58 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer
59 // since these are callee saved registers and no blocking/
60 // GC can happen in leaf calls.
61 // Further Note: DO NOT save/restore bcp/locals. If a caller has
62 // already saved them so that it can use rsi/rdi as temporaries
63 // then a save/restore here will DESTROY the copy the caller
64 // saved! There used to be a save_bcp() that only happened in
65 // the ASSERT path (no restore_bcp). Which caused bizarre failures
66 // when jvm built with ASSERTs.
67 #ifdef ASSERT
68 { Label L;
69 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
70 jcc(Assembler::equal, L);
71 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
72 bind(L);
73 }
74 #endif
75 // super call
76 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
77 // interpreter specific
78
79 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals
80 // but since they may not have been saved (and we don't want to
81 // save them here (see note above) the assert is invalid.
82 }
83
84
85 void InterpreterMacroAssembler::call_VM_base(
86 Register oop_result,
87 Register java_thread,
88 Register last_java_sp,
89 address entry_point,
90 int number_of_arguments,
91 bool check_exceptions
92 ) {
93 #ifdef ASSERT
94 { Label L;
95 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
96 jcc(Assembler::equal, L);
97 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
98 bind(L);
99 }
100 #endif /* ASSERT */
101 // interpreter specific
102 //
103 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
104 // really make a difference for these runtime calls, since they are
105 // slow anyway. Btw., bcp must be saved/restored since it may change
106 // due to GC.
107 assert(java_thread == noreg , "not expecting a precomputed java thread");
108 save_bcp();
109 // super call
110 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
111 // interpreter specific
112 restore_bcp();
113 restore_locals();
114 }
115
116
117 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
118 if (JvmtiExport::can_pop_frame()) {
119 Label L;
120 // Initiate popframe handling only if it is not already being processed. If the flag
121 // has the popframe_processing bit set, it means that this code is called *during* popframe
122 // handling - we don't want to reenter.
123 Register pop_cond = java_thread; // Not clear if any other register is available...
124 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
125 testl(pop_cond, JavaThread::popframe_pending_bit);
126 jcc(Assembler::zero, L);
127 testl(pop_cond, JavaThread::popframe_processing_bit);
128 jcc(Assembler::notZero, L);
129 // Call Interpreter::remove_activation_preserving_args_entry() to get the
130 // address of the same-named entrypoint in the generated interpreter code.
131 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
132 jmp(rax);
133 bind(L);
134 get_thread(java_thread);
135 }
136 }
137
138
139 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
140 get_thread(rcx);
141 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
142 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset());
143 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset());
144 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset());
145 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
146 + in_ByteSize(wordSize));
147 switch (state) {
148 case atos: movptr(rax, oop_addr);
149 movptr(oop_addr, NULL_WORD);
150 verify_oop(rax, state); break;
151 case ltos:
152 movl(rdx, val_addr1); // fall through
153 case btos: // fall through
154 case ctos: // fall through
155 case stos: // fall through
156 case itos: movl(rax, val_addr); break;
157 case ftos: fld_s(val_addr); break;
158 case dtos: fld_d(val_addr); break;
159 case vtos: /* nothing to do */ break;
160 default : ShouldNotReachHere();
161 }
162 // Clean up tos value in the thread object
163 movl(tos_addr, (int32_t) ilgl);
164 movptr(val_addr, NULL_WORD);
165 NOT_LP64(movptr(val_addr1, NULL_WORD));
166 }
167
168
169 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
170 if (JvmtiExport::can_force_early_return()) {
171 Label L;
172 Register tmp = java_thread;
173 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset()));
174 testptr(tmp, tmp);
175 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
176
177 // Initiate earlyret handling only if it is not already being processed.
178 // If the flag has the earlyret_processing bit set, it means that this code
179 // is called *during* earlyret handling - we don't want to reenter.
180 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
181 cmpl(tmp, JvmtiThreadState::earlyret_pending);
182 jcc(Assembler::notEqual, L);
183
184 // Call Interpreter::remove_activation_early_entry() to get the address of the
185 // same-named entrypoint in the generated interpreter code.
186 get_thread(java_thread);
187 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset()));
188 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
189 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
190 jmp(rax);
191 bind(L);
192 get_thread(java_thread);
193 }
194 }
195
196
197 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
198 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
199 movl(reg, Address(rsi, bcp_offset));
200 bswapl(reg);
201 shrl(reg, 16);
202 }
203
204
205 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) {
206 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
207 if (index_size == sizeof(u2)) {
208 load_unsigned_short(reg, Address(rsi, bcp_offset));
209 } else if (index_size == sizeof(u4)) {
210 assert(EnableInvokeDynamic, "giant index used only for JSR 292");
211 movl(reg, Address(rsi, bcp_offset));
212 // Check if the secondary index definition is still ~x, otherwise
213 // we have to change the following assembler code to calculate the
214 // plain index.
215 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
216 notl(reg); // convert to plain index
217 } else if (index_size == sizeof(u1)) {
218 load_unsigned_byte(reg, Address(rsi, bcp_offset));
219 } else {
220 ShouldNotReachHere();
221 }
222 }
223
224
225 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index,
226 int bcp_offset, size_t index_size) {
227 assert_different_registers(cache, index);
228 get_cache_index_at_bcp(index, bcp_offset, index_size);
229 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
230 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
231 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
232 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index
233 }
234
235
236 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
237 Register index,
238 Register bytecode,
239 int byte_no,
240 int bcp_offset,
241 size_t index_size) {
242 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
243 movptr(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
244 const int shift_count = (1 + byte_no) * BitsPerByte;
245 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
246 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
247 "correct shift count");
248 shrptr(bytecode, shift_count);
249 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
250 andptr(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
251 }
252
253
254 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
255 int bcp_offset, size_t index_size) {
256 assert(cache != tmp, "must use different register");
257 get_cache_index_at_bcp(tmp, bcp_offset, index_size);
258 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below");
259 // convert from field index to ConstantPoolCacheEntry index
260 // and from word offset to byte offset
261 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
262 shll(tmp, 2 + LogBytesPerWord);
263 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
264 // skip past the header
265 addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
266 addptr(cache, tmp); // construct pointer to cache entry
267 }
268
269 void InterpreterMacroAssembler::get_method_counters(Register method,
270 Register mcs, Label& skip) {
271 Label has_counters;
272 movptr(mcs, Address(method, Method::method_counters_offset()));
273 testptr(mcs, mcs);
274 jcc(Assembler::notZero, has_counters);
275 call_VM(noreg, CAST_FROM_FN_PTR(address,
276 InterpreterRuntime::build_method_counters), method);
277 movptr(mcs, Address(method,Method::method_counters_offset()));
278 testptr(mcs, mcs);
279 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
280 bind(has_counters);
281 }
282
283 // Load object from cpool->resolved_references(index)
284 void InterpreterMacroAssembler::load_resolved_reference_at_index(
285 Register result, Register index) {
286 assert_different_registers(result, index);
287 // convert from field index to resolved_references() index and from
288 // word index to byte offset. Since this is a java object, it can be compressed
289 Register tmp = index; // reuse
290 shll(tmp, LogBytesPerHeapOop);
291
292 get_constant_pool(result);
293 // load pointer for resolved_references[] objArray
294 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes()));
295 // JNIHandles::resolve(obj);
296 movptr(result, Address(result, 0));
297 // Add in the index
298 addptr(result, tmp);
299 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
300 }
301
302 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
303 // a subtype of super_klass. EAX holds the super_klass. Blows ECX.
304 // Resets EDI to locals. Register sub_klass cannot be any of the above.
305 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) {
306 assert( Rsub_klass != rax, "rax, holds superklass" );
307 assert( Rsub_klass != rcx, "used as a temp" );
308 assert( Rsub_klass != rdi, "used as a temp, restored from locals" );
309
310 // Profile the not-null value's klass.
311 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
312
313 // Do the check.
314 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
315
316 // Profile the failure of the check.
317 profile_typecheck_failed(rcx); // blows rcx
318 }
319
320 void InterpreterMacroAssembler::f2ieee() {
321 if (IEEEPrecision) {
322 fstp_s(Address(rsp, 0));
323 fld_s(Address(rsp, 0));
324 }
325 }
326
327
328 void InterpreterMacroAssembler::d2ieee() {
329 if (IEEEPrecision) {
330 fstp_d(Address(rsp, 0));
331 fld_d(Address(rsp, 0));
332 }
333 }
334
335 // Java Expression Stack
336
337 void InterpreterMacroAssembler::pop_ptr(Register r) {
338 pop(r);
339 }
340
341 void InterpreterMacroAssembler::pop_i(Register r) {
342 pop(r);
343 }
344
345 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
346 pop(lo);
347 pop(hi);
348 }
349
350 void InterpreterMacroAssembler::pop_f() {
351 fld_s(Address(rsp, 0));
352 addptr(rsp, 1 * wordSize);
353 }
354
355 void InterpreterMacroAssembler::pop_d() {
356 fld_d(Address(rsp, 0));
357 addptr(rsp, 2 * wordSize);
358 }
359
360
361 void InterpreterMacroAssembler::pop(TosState state) {
362 switch (state) {
363 case atos: pop_ptr(rax); break;
364 case btos: // fall through
365 case ctos: // fall through
366 case stos: // fall through
367 case itos: pop_i(rax); break;
368 case ltos: pop_l(rax, rdx); break;
369 case ftos: pop_f(); break;
370 case dtos: pop_d(); break;
371 case vtos: /* nothing to do */ break;
372 default : ShouldNotReachHere();
373 }
374 verify_oop(rax, state);
375 }
376
377 void InterpreterMacroAssembler::push_ptr(Register r) {
378 push(r);
379 }
380
381 void InterpreterMacroAssembler::push_i(Register r) {
382 push(r);
383 }
384
385 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
386 push(hi);
387 push(lo);
388 }
389
390 void InterpreterMacroAssembler::push_f() {
391 // Do not schedule for no AGI! Never write beyond rsp!
392 subptr(rsp, 1 * wordSize);
393 fstp_s(Address(rsp, 0));
394 }
395
396 void InterpreterMacroAssembler::push_d(Register r) {
397 // Do not schedule for no AGI! Never write beyond rsp!
398 subptr(rsp, 2 * wordSize);
399 fstp_d(Address(rsp, 0));
400 }
401
402
403 void InterpreterMacroAssembler::push(TosState state) {
404 verify_oop(rax, state);
405 switch (state) {
406 case atos: push_ptr(rax); break;
407 case btos: // fall through
408 case ctos: // fall through
409 case stos: // fall through
410 case itos: push_i(rax); break;
411 case ltos: push_l(rax, rdx); break;
412 case ftos: push_f(); break;
413 case dtos: push_d(rax); break;
414 case vtos: /* nothing to do */ break;
415 default : ShouldNotReachHere();
416 }
417 }
418
419
420 // Helpers for swap and dup
421 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
422 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
423 }
424
425 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
426 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
427 }
428
429 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
430 // set sender sp
431 lea(rsi, Address(rsp, wordSize));
432 // record last_sp
433 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi);
434 }
435
436
437 // Jump to from_interpreted entry of a call unless single stepping is possible
438 // in this thread in which case we must call the i2i entry
439 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
440 prepare_to_jump_from_interpreted();
441
442 if (JvmtiExport::can_post_interpreter_events()) {
443 Label run_compiled_code;
444 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
445 // compiled code in threads for which the event is enabled. Check here for
446 // interp_only_mode if these events CAN be enabled.
447 get_thread(temp);
448 // interp_only is an int, on little endian it is sufficient to test the byte only
449 // Is a cmpl faster?
450 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
451 jccb(Assembler::zero, run_compiled_code);
452 jmp(Address(method, Method::interpreter_entry_offset()));
453 bind(run_compiled_code);
454 }
455
456 jmp(Address(method, Method::from_interpreted_offset()));
457
458 }
459
460
461 // The following two routines provide a hook so that an implementation
462 // can schedule the dispatch in two parts. Intel does not do this.
463 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
464 // Nothing Intel-specific to be done here.
465 }
466
467 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
468 dispatch_next(state, step);
469 }
470
471 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table,
472 bool verifyoop) {
473 verify_FPU(1, state);
474 if (VerifyActivationFrameSize) {
475 Label L;
476 mov(rcx, rbp);
477 subptr(rcx, rsp);
478 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize;
479 cmpptr(rcx, min_frame_size);
480 jcc(Assembler::greaterEqual, L);
481 stop("broken stack frame");
482 bind(L);
483 }
484 if (verifyoop) verify_oop(rax, state);
485 Address index(noreg, rbx, Address::times_ptr);
486 ExternalAddress tbl((address)table);
487 ArrayAddress dispatch(tbl, index);
488 jump(dispatch);
489 }
490
491
492 void InterpreterMacroAssembler::dispatch_only(TosState state) {
493 dispatch_base(state, Interpreter::dispatch_table(state));
494 }
495
496
497 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
498 dispatch_base(state, Interpreter::normal_table(state));
499 }
500
501 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
502 dispatch_base(state, Interpreter::normal_table(state), false);
503 }
504
505
506 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
507 // load next bytecode (load before advancing rsi to prevent AGI)
508 load_unsigned_byte(rbx, Address(rsi, step));
509 // advance rsi
510 increment(rsi, step);
511 dispatch_base(state, Interpreter::dispatch_table(state));
512 }
513
514
515 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
516 // load current bytecode
517 load_unsigned_byte(rbx, Address(rsi, 0));
518 dispatch_base(state, table);
519 }
520
521 // remove activation
522 //
523 // Unlock the receiver if this is a synchronized method.
524 // Unlock any Java monitors from syncronized blocks.
525 // Remove the activation from the stack.
526 //
527 // If there are locked Java monitors
528 // If throw_monitor_exception
529 // throws IllegalMonitorStateException
530 // Else if install_monitor_exception
531 // installs IllegalMonitorStateException
532 // Else
533 // no error processing
534 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr,
535 bool throw_monitor_exception,
536 bool install_monitor_exception,
537 bool notify_jvmdi) {
538 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result
539 // check if synchronized method
540 Label unlocked, unlock, no_unlock;
541
542 get_thread(rcx);
543 const Address do_not_unlock_if_synchronized(rcx,
544 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
545
546 movbool(rbx, do_not_unlock_if_synchronized);
547 mov(rdi,rbx);
548 movbool(do_not_unlock_if_synchronized, false); // reset the flag
549
550 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags
551 movl(rcx, Address(rbx, Method::access_flags_offset()));
552
553 testl(rcx, JVM_ACC_SYNCHRONIZED);
554 jcc(Assembler::zero, unlocked);
555
556 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
557 // is set.
558 mov(rcx,rdi);
559 testbool(rcx);
560 jcc(Assembler::notZero, no_unlock);
561
562 // unlock monitor
563 push(state); // save result
564
565 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
566 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
567 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
568 lea (rdx, monitor); // address of first monitor
569
570 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
571 testptr(rax, rax);
572 jcc (Assembler::notZero, unlock);
573
574 pop(state);
575 if (throw_monitor_exception) {
576 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
577
578 // Entry already unlocked, need to throw exception
579 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
580 should_not_reach_here();
581 } else {
582 // Monitor already unlocked during a stack unroll.
583 // If requested, install an illegal_monitor_state_exception.
584 // Continue with stack unrolling.
585 if (install_monitor_exception) {
586 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
587 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
588 }
589 jmp(unlocked);
590 }
591
592 bind(unlock);
593 unlock_object(rdx);
594 pop(state);
595
596 // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
597 bind(unlocked);
598
599 // rax, rdx: Might contain return value
600
601 // Check that all monitors are unlocked
602 {
603 Label loop, exception, entry, restart;
604 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
605 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
606 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
607
608 bind(restart);
609 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry
610 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block
611 jmp(entry);
612
613 // Entry already locked, need to throw exception
614 bind(exception);
615
616 if (throw_monitor_exception) {
617 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
618
619 // Throw exception
620 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
621 should_not_reach_here();
622 } else {
623 // Stack unrolling. Unlock object and install illegal_monitor_exception
624 // Unlock does not block, so don't have to worry about the frame
625
626 push(state);
627 mov(rdx, rcx);
628 unlock_object(rdx);
629 pop(state);
630
631 if (install_monitor_exception) {
632 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow
633 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
634 }
635
636 jmp(restart);
637 }
638
639 bind(loop);
640 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used
641 jcc(Assembler::notEqual, exception);
642
643 addptr(rcx, entry_size); // otherwise advance to next entry
644 bind(entry);
645 cmpptr(rcx, rbx); // check if bottom reached
646 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
647 }
648
649 bind(no_unlock);
650
651 // jvmti support
652 if (notify_jvmdi) {
653 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
654 } else {
655 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
656 }
657
658 // remove activation
659 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
660 leave(); // remove frame anchor
661 pop(ret_addr); // get return address
662 mov(rsp, rbx); // set sp to sender sp
663 if (UseSSE) {
664 // float and double are returned in xmm register in SSE-mode
665 if (state == ftos && UseSSE >= 1) {
666 subptr(rsp, wordSize);
667 fstp_s(Address(rsp, 0));
668 movflt(xmm0, Address(rsp, 0));
669 addptr(rsp, wordSize);
670 } else if (state == dtos && UseSSE >= 2) {
671 subptr(rsp, 2*wordSize);
672 fstp_d(Address(rsp, 0));
673 movdbl(xmm0, Address(rsp, 0));
674 addptr(rsp, 2*wordSize);
675 }
676 }
677 }
678
679 #endif /* !CC_INTERP */
680
681
682 // Lock object
683 //
684 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must
685 // be initialized with object to lock
686 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
687 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
688
689 if (UseHeavyMonitors) {
690 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
691 } else {
692
693 Label done;
694
695 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
696 const Register obj_reg = rcx; // Will contain the oop
697
698 const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
699 const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
700 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes();
701
702 Label slow_case;
703
704 // Load object pointer into obj_reg %rcx
705 movptr(obj_reg, Address(lock_reg, obj_offset));
706
707 if (UseBiasedLocking) {
708 // Note: we use noreg for the temporary register since it's hard
709 // to come up with a free register on all incoming code paths
710 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case);
711 }
712
713 // Load immediate 1 into swap_reg %rax,
714 movptr(swap_reg, (int32_t)1);
715
716 // Load (object->mark() | 1) into swap_reg %rax,
717 orptr(swap_reg, Address(obj_reg, 0));
718
719 // Save (object->mark() | 1) into BasicLock's displaced header
720 movptr(Address(lock_reg, mark_offset), swap_reg);
721
722 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
723 if (os::is_MP()) {
724 lock();
725 }
726 cmpxchgptr(lock_reg, Address(obj_reg, 0));
727 if (PrintBiasedLockingStatistics) {
728 cond_inc32(Assembler::zero,
729 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
730 }
731 jcc(Assembler::zero, done);
732
733 // Test if the oopMark is an obvious stack pointer, i.e.,
734 // 1) (mark & 3) == 0, and
735 // 2) rsp <= mark < mark + os::pagesize()
736 //
737 // These 3 tests can be done by evaluating the following
738 // expression: ((mark - rsp) & (3 - os::vm_page_size())),
739 // assuming both stack pointer and pagesize have their
740 // least significant 2 bits clear.
741 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg
742 subptr(swap_reg, rsp);
743 andptr(swap_reg, 3 - os::vm_page_size());
744
745 // Save the test result, for recursive case, the result is zero
746 movptr(Address(lock_reg, mark_offset), swap_reg);
747
748 if (PrintBiasedLockingStatistics) {
749 cond_inc32(Assembler::zero,
750 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
751 }
752 jcc(Assembler::zero, done);
753
754 bind(slow_case);
755
756 // Call the runtime routine for slow case
757 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
758
759 bind(done);
760 }
761 }
762
763
764 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
765 //
766 // Argument: rdx : Points to BasicObjectLock structure for lock
767 // Throw an IllegalMonitorException if object is not locked by current thread
768 //
769 // Uses: rax, rbx, rcx, rdx
770 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
771 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx");
772
773 if (UseHeavyMonitors) {
774 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
775 } else {
776 Label done;
777
778 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction
779 const Register header_reg = rbx; // Will contain the old oopMark
780 const Register obj_reg = rcx; // Will contain the oop
781
782 save_bcp(); // Save in case of exception
783
784 // Convert from BasicObjectLock structure to object and BasicLock structure
785 // Store the BasicLock address into %rax,
786 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
787
788 // Load oop into obj_reg(%rcx)
789 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ()));
790
791 // Free entry
792 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD);
793
794 if (UseBiasedLocking) {
795 biased_locking_exit(obj_reg, header_reg, done);
796 }
797
798 // Load the old header from BasicLock structure
799 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes()));
800
801 // Test for recursion
802 testptr(header_reg, header_reg);
803
804 // zero for recursive case
805 jcc(Assembler::zero, done);
806
807 // Atomic swap back the old header
808 if (os::is_MP()) lock();
809 cmpxchgptr(header_reg, Address(obj_reg, 0));
810
811 // zero for recursive case
812 jcc(Assembler::zero, done);
813
814 // Call the runtime routine for slow case.
815 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj
816 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
817
818 bind(done);
819
820 restore_bcp();
821 }
822 }
823
824
825 #ifndef CC_INTERP
826
827 // Test ImethodDataPtr. If it is null, continue at the specified label
828 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) {
829 assert(ProfileInterpreter, "must be profiling interpreter");
830 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize));
831 testptr(mdp, mdp);
832 jcc(Assembler::zero, zero_continue);
833 }
834
835
836 // Set the method data pointer for the current bcp.
837 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
838 assert(ProfileInterpreter, "must be profiling interpreter");
839 Label set_mdp;
840 push(rax);
841 push(rbx);
842
843 get_method(rbx);
844 // Test MDO to avoid the call if it is NULL.
845 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
846 testptr(rax, rax);
847 jcc(Assembler::zero, set_mdp);
848 // rbx,: method
849 // rsi: bcp
850 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi);
851 // rax,: mdi
852 // mdo is guaranteed to be non-zero here, we checked for it before the call.
853 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
854 addptr(rbx, in_bytes(MethodData::data_offset()));
855 addptr(rax, rbx);
856 bind(set_mdp);
857 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
858 pop(rbx);
859 pop(rax);
860 }
861
862 void InterpreterMacroAssembler::verify_method_data_pointer() {
863 assert(ProfileInterpreter, "must be profiling interpreter");
864 #ifdef ASSERT
865 Label verify_continue;
866 push(rax);
867 push(rbx);
868 push(rcx);
869 push(rdx);
870 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue
871 get_method(rbx);
872
873 // If the mdp is valid, it will point to a DataLayout header which is
874 // consistent with the bcp. The converse is highly probable also.
875 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset())));
876 addptr(rdx, Address(rbx, Method::const_offset()));
877 lea(rdx, Address(rdx, ConstMethod::codes_offset()));
878 cmpptr(rdx, rsi);
879 jcc(Assembler::equal, verify_continue);
880 // rbx,: method
881 // rsi: bcp
882 // rcx: mdp
883 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx);
884 bind(verify_continue);
885 pop(rdx);
886 pop(rcx);
887 pop(rbx);
888 pop(rax);
889 #endif // ASSERT
890 }
891
892
893 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) {
894 // %%% this seems to be used to store counter data which is surely 32bits
895 // however 64bit side stores 64 bits which seems wrong
896 assert(ProfileInterpreter, "must be profiling interpreter");
897 Address data(mdp_in, constant);
898 movptr(data, value);
899 }
900
901
902 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
903 int constant,
904 bool decrement) {
905 // Counter address
906 Address data(mdp_in, constant);
907
908 increment_mdp_data_at(data, decrement);
909 }
910
911
912 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
913 bool decrement) {
914
915 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
916 assert(ProfileInterpreter, "must be profiling interpreter");
917
918 // %%% 64bit treats this as 64 bit which seems unlikely
919 if (decrement) {
920 // Decrement the register. Set condition codes.
921 addl(data, -DataLayout::counter_increment);
922 // If the decrement causes the counter to overflow, stay negative
923 Label L;
924 jcc(Assembler::negative, L);
925 addl(data, DataLayout::counter_increment);
926 bind(L);
927 } else {
928 assert(DataLayout::counter_increment == 1,
929 "flow-free idiom only works with 1");
930 // Increment the register. Set carry flag.
931 addl(data, DataLayout::counter_increment);
932 // If the increment causes the counter to overflow, pull back by 1.
933 sbbl(data, 0);
934 }
935 }
936
937
938 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
939 Register reg,
940 int constant,
941 bool decrement) {
942 Address data(mdp_in, reg, Address::times_1, constant);
943
944 increment_mdp_data_at(data, decrement);
945 }
946
947
948 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) {
949 assert(ProfileInterpreter, "must be profiling interpreter");
950 int header_offset = in_bytes(DataLayout::header_offset());
951 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
952 // Set the flag
953 orl(Address(mdp_in, header_offset), header_bits);
954 }
955
956
957
958 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
959 int offset,
960 Register value,
961 Register test_value_out,
962 Label& not_equal_continue) {
963 assert(ProfileInterpreter, "must be profiling interpreter");
964 if (test_value_out == noreg) {
965 cmpptr(value, Address(mdp_in, offset));
966 } else {
967 // Put the test value into a register, so caller can use it:
968 movptr(test_value_out, Address(mdp_in, offset));
969 cmpptr(test_value_out, value);
970 }
971 jcc(Assembler::notEqual, not_equal_continue);
972 }
973
974
975 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) {
976 assert(ProfileInterpreter, "must be profiling interpreter");
977 Address disp_address(mdp_in, offset_of_disp);
978 addptr(mdp_in,disp_address);
979 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
980 }
981
982
983 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) {
984 assert(ProfileInterpreter, "must be profiling interpreter");
985 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
986 addptr(mdp_in, disp_address);
987 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
988 }
989
990
991 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) {
992 assert(ProfileInterpreter, "must be profiling interpreter");
993 addptr(mdp_in, constant);
994 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in);
995 }
996
997
998 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
999 assert(ProfileInterpreter, "must be profiling interpreter");
1000 push(return_bci); // save/restore across call_VM
1001 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
1002 pop(return_bci);
1003 }
1004
1005
1006 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) {
1007 if (ProfileInterpreter) {
1008 Label profile_continue;
1009
1010 // If no method data exists, go to profile_continue.
1011 // Otherwise, assign to mdp
1012 test_method_data_pointer(mdp, profile_continue);
1013
1014 // We are taking a branch. Increment the taken count.
1015 // We inline increment_mdp_data_at to return bumped_count in a register
1016 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
1017 Address data(mdp, in_bytes(JumpData::taken_offset()));
1018
1019 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit
1020 movl(bumped_count,data);
1021 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" );
1022 addl(bumped_count, DataLayout::counter_increment);
1023 sbbl(bumped_count, 0);
1024 movl(data,bumped_count); // Store back out
1025
1026 // The method data pointer needs to be updated to reflect the new target.
1027 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
1028 bind (profile_continue);
1029 }
1030 }
1031
1032
1033 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
1034 if (ProfileInterpreter) {
1035 Label profile_continue;
1036
1037 // If no method data exists, go to profile_continue.
1038 test_method_data_pointer(mdp, profile_continue);
1039
1040 // We are taking a branch. Increment the not taken count.
1041 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
1042
1043 // The method data pointer needs to be updated to correspond to the next bytecode
1044 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
1045 bind (profile_continue);
1046 }
1047 }
1048
1049 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
1050 Label update, next, none;
1051
1052 verify_oop(obj);
1053
1054 testptr(obj, obj);
1055 jccb(Assembler::notZero, update);
1056 orptr(mdo_addr, TypeEntries::null_seen);
1057 jmpb(next);
1058
1059 bind(update);
1060 load_klass(obj, obj);
1061
1062 xorptr(obj, mdo_addr);
1063 testptr(obj, TypeEntries::type_klass_mask);
1064 jccb(Assembler::zero, next); // klass seen before, nothing to
1065 // do. The unknown bit may have been
1066 // set already but no need to check.
1067
1068 testptr(obj, TypeEntries::type_unknown);
1069 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
1070
1071 cmpptr(mdo_addr, 0);
1072 jccb(Assembler::equal, none);
1073 cmpptr(mdo_addr, TypeEntries::null_seen);
1074 jccb(Assembler::equal, none);
1075 // There is a chance that the checks above (re-reading profiling
1076 // data from memory) fail if another thread has just set the
1077 // profiling to this obj's klass
1078 xorptr(obj, mdo_addr);
1079 testptr(obj, TypeEntries::type_klass_mask);
1080 jccb(Assembler::zero, next);
1081
1082 // different than before. Cannot keep accurate profile.
1083 orptr(mdo_addr, TypeEntries::type_unknown);
1084 jmpb(next);
1085
1086 bind(none);
1087 // first time here. Set profile type.
1088 movptr(mdo_addr, obj);
1089
1090 bind(next);
1091 }
1092
1093 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
1094 if (!ProfileInterpreter) {
1095 return;
1096 }
1097
1098 if (MethodData::profile_arguments() || MethodData::profile_return()) {
1099 Label profile_continue;
1100
1101 test_method_data_pointer(mdp, profile_continue);
1102
1103 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
1104
1105 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
1106 jcc(Assembler::notEqual, profile_continue);
1107
1108 if (MethodData::profile_arguments()) {
1109 Label done;
1110 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
1111 addptr(mdp, off_to_args);
1112
1113 for (int i = 0; i < TypeProfileArgsLimit; i++) {
1114 if (i > 0 || MethodData::profile_return()) {
1115 // If return value type is profiled we may have no argument to profile
1116 movl(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
1117 subl(tmp, i*TypeStackSlotEntries::per_arg_count());
1118 cmpl(tmp, TypeStackSlotEntries::per_arg_count());
1119 jcc(Assembler::less, done);
1120 }
1121 movptr(tmp, Address(callee, Method::const_offset()));
1122 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
1123 subl(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
1124 subl(tmp, 1);
1125 Address arg_addr = argument_address(tmp);
1126 movptr(tmp, arg_addr);
1127
1128 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
1129 profile_obj_type(tmp, mdo_arg_addr);
1130
1131 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
1132 addptr(mdp, to_add);
1133 off_to_args += to_add;
1134 }
1135
1136 if (MethodData::profile_return()) {
1137 movl(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
1138 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
1139 }
1140
1141 bind(done);
1142
1143 if (MethodData::profile_return()) {
1144 // We're right after the type profile for the last
1145 // argument. tmp is the number of cell left in the
1146 // CallTypeData/VirtualCallTypeData to reach its end. Non null
1147 // if there's a return to profile.
1148 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
1149 shll(tmp, exact_log2(DataLayout::cell_size));
1150 addptr(mdp, tmp);
1151 }
1152 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp);
1153 } else {
1154 assert(MethodData::profile_return(), "either profile call args or call ret");
1155 update_mdp_by_constant(mdp, in_bytes(ReturnTypeEntry::size()));
1156 }
1157
1158 // mdp points right after the end of the
1159 // CallTypeData/VirtualCallTypeData, right after the cells for the
1160 // return value type if there's one
1161
1162 bind(profile_continue);
1163 }
1164 }
1165
1166 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
1167 if (ProfileInterpreter && MethodData::profile_return()) {
1168 Label profile_continue, done;
1169
1170 test_method_data_pointer(mdp, profile_continue);
1171
1172 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
1173 mov(tmp, ret);
1174 profile_obj_type(tmp, mdo_ret_addr);
1175
1176 bind(profile_continue);
1177 }
1178 }
1179
1180 void InterpreterMacroAssembler::profile_call(Register mdp) {
1181 if (ProfileInterpreter) {
1182 Label profile_continue;
1183
1184 // If no method data exists, go to profile_continue.
1185 test_method_data_pointer(mdp, profile_continue);
1186
1187 // We are making a call. Increment the count.
1188 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1189
1190 // The method data pointer needs to be updated to reflect the new target.
1191 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
1192 bind (profile_continue);
1193 }
1194 }
1195
1196
1197 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
1198 if (ProfileInterpreter) {
1199 Label profile_continue;
1200
1201 // If no method data exists, go to profile_continue.
1202 test_method_data_pointer(mdp, profile_continue);
1203
1204 // We are making a call. Increment the count.
1205 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1206
1207 // The method data pointer needs to be updated to reflect the new target.
1208 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
1209 bind (profile_continue);
1210 }
1211 }
1212
1213
1214 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp,
1215 Register reg2,
1216 bool receiver_can_be_null) {
1217 if (ProfileInterpreter) {
1218 Label profile_continue;
1219
1220 // If no method data exists, go to profile_continue.
1221 test_method_data_pointer(mdp, profile_continue);
1222
1223 Label skip_receiver_profile;
1224 if (receiver_can_be_null) {
1225 Label not_null;
1226 testptr(receiver, receiver);
1227 jccb(Assembler::notZero, not_null);
1228 // We are making a call. Increment the count for null receiver.
1229 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1230 jmp(skip_receiver_profile);
1231 bind(not_null);
1232 }
1233
1234 // Record the receiver type.
1235 record_klass_in_profile(receiver, mdp, reg2, true);
1236 bind(skip_receiver_profile);
1237
1238 // The method data pointer needs to be updated to reflect the new target.
1239 update_mdp_by_constant(mdp,
1240 in_bytes(VirtualCallData::
1241 virtual_call_data_size()));
1242 bind(profile_continue);
1243 }
1244 }
1245
1246
1247 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1248 Register receiver, Register mdp,
1249 Register reg2, int start_row,
1250 Label& done, bool is_virtual_call) {
1251 if (TypeProfileWidth == 0) {
1252 if (is_virtual_call) {
1253 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1254 }
1255 return;
1256 }
1257
1258 int last_row = VirtualCallData::row_limit() - 1;
1259 assert(start_row <= last_row, "must be work left to do");
1260 // Test this row for both the receiver and for null.
1261 // Take any of three different outcomes:
1262 // 1. found receiver => increment count and goto done
1263 // 2. found null => keep looking for case 1, maybe allocate this cell
1264 // 3. found something else => keep looking for cases 1 and 2
1265 // Case 3 is handled by a recursive call.
1266 for (int row = start_row; row <= last_row; row++) {
1267 Label next_test;
1268 bool test_for_null_also = (row == start_row);
1269
1270 // See if the receiver is receiver[n].
1271 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1272 test_mdp_data_at(mdp, recvr_offset, receiver,
1273 (test_for_null_also ? reg2 : noreg),
1274 next_test);
1275 // (Reg2 now contains the receiver from the CallData.)
1276
1277 // The receiver is receiver[n]. Increment count[n].
1278 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1279 increment_mdp_data_at(mdp, count_offset);
1280 jmp(done);
1281 bind(next_test);
1282
1283 if (row == start_row) {
1284 Label found_null;
1285 // Failed the equality check on receiver[n]... Test for null.
1286 testptr(reg2, reg2);
1287 if (start_row == last_row) {
1288 // The only thing left to do is handle the null case.
1289 if (is_virtual_call) {
1290 jccb(Assembler::zero, found_null);
1291 // Receiver did not match any saved receiver and there is no empty row for it.
1292 // Increment total counter to indicate polymorphic case.
1293 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1294 jmp(done);
1295 bind(found_null);
1296 } else {
1297 jcc(Assembler::notZero, done);
1298 }
1299 break;
1300 }
1301 // Since null is rare, make it be the branch-taken case.
1302 jcc(Assembler::zero, found_null);
1303
1304 // Put all the "Case 3" tests here.
1305 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
1306
1307 // Found a null. Keep searching for a matching receiver,
1308 // but remember that this is an empty (unused) slot.
1309 bind(found_null);
1310 }
1311 }
1312
1313 // In the fall-through case, we found no matching receiver, but we
1314 // observed the receiver[start_row] is NULL.
1315
1316 // Fill in the receiver field and increment the count.
1317 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1318 set_mdp_data_at(mdp, recvr_offset, receiver);
1319 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1320 movptr(reg2, (intptr_t)DataLayout::counter_increment);
1321 set_mdp_data_at(mdp, count_offset, reg2);
1322 if (start_row > 0) {
1323 jmp(done);
1324 }
1325 }
1326
1327 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1328 Register mdp, Register reg2,
1329 bool is_virtual_call) {
1330 assert(ProfileInterpreter, "must be profiling");
1331 Label done;
1332
1333 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
1334
1335 bind (done);
1336 }
1337
1338 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) {
1339 if (ProfileInterpreter) {
1340 Label profile_continue;
1341 uint row;
1342
1343 // If no method data exists, go to profile_continue.
1344 test_method_data_pointer(mdp, profile_continue);
1345
1346 // Update the total ret count.
1347 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
1348
1349 for (row = 0; row < RetData::row_limit(); row++) {
1350 Label next_test;
1351
1352 // See if return_bci is equal to bci[n]:
1353 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci,
1354 noreg, next_test);
1355
1356 // return_bci is equal to bci[n]. Increment the count.
1357 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
1358
1359 // The method data pointer needs to be updated to reflect the new target.
1360 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row)));
1361 jmp(profile_continue);
1362 bind(next_test);
1363 }
1364
1365 update_mdp_for_ret(return_bci);
1366
1367 bind (profile_continue);
1368 }
1369 }
1370
1371
1372 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
1373 if (ProfileInterpreter) {
1374 Label profile_continue;
1375
1376 // If no method data exists, go to profile_continue.
1377 test_method_data_pointer(mdp, profile_continue);
1378
1379 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
1380
1381 // The method data pointer needs to be updated.
1382 int mdp_delta = in_bytes(BitData::bit_data_size());
1383 if (TypeProfileCasts) {
1384 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1385 }
1386 update_mdp_by_constant(mdp, mdp_delta);
1387
1388 bind (profile_continue);
1389 }
1390 }
1391
1392
1393 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
1394 if (ProfileInterpreter && TypeProfileCasts) {
1395 Label profile_continue;
1396
1397 // If no method data exists, go to profile_continue.
1398 test_method_data_pointer(mdp, profile_continue);
1399
1400 int count_offset = in_bytes(CounterData::count_offset());
1401 // Back up the address, since we have already bumped the mdp.
1402 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1403
1404 // *Decrement* the counter. We expect to see zero or small negatives.
1405 increment_mdp_data_at(mdp, count_offset, true);
1406
1407 bind (profile_continue);
1408 }
1409 }
1410
1411
1412 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2)
1413 {
1414 if (ProfileInterpreter) {
1415 Label profile_continue;
1416
1417 // If no method data exists, go to profile_continue.
1418 test_method_data_pointer(mdp, profile_continue);
1419
1420 // The method data pointer needs to be updated.
1421 int mdp_delta = in_bytes(BitData::bit_data_size());
1422 if (TypeProfileCasts) {
1423 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1424
1425 // Record the object type.
1426 record_klass_in_profile(klass, mdp, reg2, false);
1427 assert(reg2 == rdi, "we know how to fix this blown reg");
1428 restore_locals(); // Restore EDI
1429 }
1430 update_mdp_by_constant(mdp, mdp_delta);
1431
1432 bind(profile_continue);
1433 }
1434 }
1435
1436
1437 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
1438 if (ProfileInterpreter) {
1439 Label profile_continue;
1440
1441 // If no method data exists, go to profile_continue.
1442 test_method_data_pointer(mdp, profile_continue);
1443
1444 // Update the default case count
1445 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
1446
1447 // The method data pointer needs to be updated.
1448 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset()));
1449
1450 bind (profile_continue);
1451 }
1452 }
1453
1454
1455 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) {
1456 if (ProfileInterpreter) {
1457 Label profile_continue;
1458
1459 // If no method data exists, go to profile_continue.
1460 test_method_data_pointer(mdp, profile_continue);
1461
1462 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1463 movptr(reg2, (intptr_t)in_bytes(MultiBranchData::per_case_size()));
1464 // index is positive and so should have correct value if this code were
1465 // used on 64bits
1466 imulptr(index, reg2);
1467 addptr(index, in_bytes(MultiBranchData::case_array_offset()));
1468
1469 // Update the case count
1470 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
1471
1472 // The method data pointer needs to be updated.
1473 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset()));
1474
1475 bind (profile_continue);
1476 }
1477 }
1478
1479 #endif // !CC_INTERP
1480
1481
1482
1483 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
1484 if (state == atos) MacroAssembler::verify_oop(reg);
1485 }
1486
1487
1488 #ifndef CC_INTERP
1489 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
1490 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
1491 }
1492
1493 #endif /* CC_INTERP */
1494
1495
1496 void InterpreterMacroAssembler::notify_method_entry() {
1497 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1498 // track stack depth. If it is possible to enter interp_only_mode we add
1499 // the code to check if the event should be sent.
1500 if (JvmtiExport::can_post_interpreter_events()) {
1501 Label L;
1502 get_thread(rcx);
1503 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1504 testl(rcx,rcx);
1505 jcc(Assembler::zero, L);
1506 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
1507 bind(L);
1508 }
1509
1510 {
1511 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1512 get_thread(rcx);
1513 get_method(rbx);
1514 call_VM_leaf(
1515 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx);
1516 }
1517
1518 // RedefineClasses() tracing support for obsolete method entry
1519 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
1520 get_thread(rcx);
1521 get_method(rbx);
1522 call_VM_leaf(
1523 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
1524 rcx, rbx);
1525 }
1526 }
1527
1528
1529 void InterpreterMacroAssembler::notify_method_exit(
1530 TosState state, NotifyMethodExitMode mode) {
1531 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
1532 // track stack depth. If it is possible to enter interp_only_mode we add
1533 // the code to check if the event should be sent.
1534 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
1535 Label L;
1536 // Note: frame::interpreter_frame_result has a dependency on how the
1537 // method result is saved across the call to post_method_exit. If this
1538 // is changed then the interpreter_frame_result implementation will
1539 // need to be updated too.
1540
1541 // For c++ interpreter the result is always stored at a known location in the frame
1542 // template interpreter will leave it on the top of the stack.
1543 NOT_CC_INTERP(push(state);)
1544 get_thread(rcx);
1545 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset()));
1546 testl(rcx,rcx);
1547 jcc(Assembler::zero, L);
1548 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
1549 bind(L);
1550 NOT_CC_INTERP(pop(state);)
1551 }
1552
1553 {
1554 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
1555 NOT_CC_INTERP(push(state));
1556 get_thread(rbx);
1557 get_method(rcx);
1558 call_VM_leaf(
1559 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
1560 rbx, rcx);
1561 NOT_CC_INTERP(pop(state));
1562 }
1563 }
1564
1565 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
1566 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
1567 int increment, int mask,
1568 Register scratch, bool preloaded,
1569 Condition cond, Label* where) {
1570 if (!preloaded) {
1571 movl(scratch, counter_addr);
1572 }
1573 incrementl(scratch, increment);
1574 movl(counter_addr, scratch);
1575 andl(scratch, mask);
1576 jcc(cond, *where);
1577 }