1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "interpreter/bytecodeHistogram.hpp"
28 #include "interpreter/interp_masm.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/templateInterpreterGenerator.hpp"
32 #include "interpreter/templateTable.hpp"
33 #include "oops/arrayOop.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "oops/valueKlass.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiThreadState.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/deoptimization.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/stubRoutines.hpp"
45 #include "runtime/synchronizer.hpp"
46 #include "runtime/timer.hpp"
47 #include "runtime/vframeArray.hpp"
48 #include "utilities/debug.hpp"
49 #include "utilities/macros.hpp"
50
51 #define __ _masm->
52
53 // Size of interpreter code. Increase if too small. Interpreter will
54 // fail with a guarantee ("not enough space for interpreter generation");
55 // if too small.
56 // Run with +PrintInterpreter to get the VM to print out the size.
57 // Max size with JVMTI
58 #ifdef AMD64
59 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(280) NOT_JVMCI(268) * 1024;
60 #else
61 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
62 #endif // AMD64
63
64 // Global Register Names
65 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
66 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
67
68 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
69 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
70 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
71
72
73 //-----------------------------------------------------------------------------
74
75 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
76 address entry = __ pc();
77
78 #ifdef ASSERT
79 {
80 Label L;
81 __ lea(rax, Address(rbp,
82 frame::interpreter_frame_monitor_block_top_offset *
83 wordSize));
84 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
85 // grows negative)
86 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
87 __ stop ("interpreter frame not set up");
88 __ bind(L);
89 }
90 #endif // ASSERT
91 // Restore bcp under the assumption that the current frame is still
92 // interpreted
93 __ restore_bcp();
94
95 // expression stack must be empty before entering the VM if an
96 // exception happened
97 __ empty_expression_stack();
98 // throw exception
99 __ call_VM(noreg,
100 CAST_FROM_FN_PTR(address,
101 InterpreterRuntime::throw_StackOverflowError));
102 return entry;
103 }
104
105 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
106 const char* name) {
107 address entry = __ pc();
108 // expression stack must be empty before entering the VM if an
109 // exception happened
110 __ empty_expression_stack();
111 // setup parameters
112 // ??? convention: expect aberrant index in register ebx
113 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
114 __ lea(rarg, ExternalAddress((address)name));
115 __ call_VM(noreg,
116 CAST_FROM_FN_PTR(address,
117 InterpreterRuntime::
118 throw_ArrayIndexOutOfBoundsException),
119 rarg, rbx);
120 return entry;
121 }
122
123 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
124 address entry = __ pc();
125
126 // object is at TOS
127 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
128 __ pop(rarg);
129
130 // expression stack must be empty before entering the VM if an
131 // exception happened
132 __ empty_expression_stack();
133
134 __ call_VM(noreg,
135 CAST_FROM_FN_PTR(address,
136 InterpreterRuntime::
137 throw_ClassCastException),
138 rarg);
139 return entry;
140 }
141
142 address TemplateInterpreterGenerator::generate_exception_handler_common(
143 const char* name, const char* message, bool pass_oop) {
144 assert(!pass_oop || message == NULL, "either oop or message but not both");
145 address entry = __ pc();
146
147 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
148 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
149
150 if (pass_oop) {
151 // object is at TOS
152 __ pop(rarg2);
153 }
154 // expression stack must be empty before entering the VM if an
155 // exception happened
156 __ empty_expression_stack();
157 // setup parameters
158 __ lea(rarg, ExternalAddress((address)name));
159 if (pass_oop) {
160 __ call_VM(rax, CAST_FROM_FN_PTR(address,
161 InterpreterRuntime::
162 create_klass_exception),
163 rarg, rarg2);
164 } else {
165 __ lea(rarg2, ExternalAddress((address)message));
166 __ call_VM(rax,
167 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
168 rarg, rarg2);
169 }
170 // throw exception
171 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
172 return entry;
173 }
174
175 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
176 address entry = __ pc();
177
178 #ifndef _LP64
179 #ifdef COMPILER2
180 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
181 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
182 for (int i = 1; i < 8; i++) {
183 __ ffree(i);
184 }
185 } else if (UseSSE < 2) {
186 __ empty_FPU_stack();
187 }
188 #endif // COMPILER2
189 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
190 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
191 } else {
192 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
193 }
194
195 if (state == ftos) {
196 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
197 } else if (state == dtos) {
198 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
199 }
200 #endif // _LP64
201
202 // Restore stack bottom in case i2c adjusted stack
203 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
204 // and NULL it as marker that esp is now tos until next java call
205 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
206
207 if (/*state == qtos*/ false && ValueTypeReturnedAsFields) {
208 #ifndef _LP64
209 __ super_call_VM_leaf(StubRoutines::store_value_type_fields_to_buf());
210 #else
211 // A value type is being returned. If fields are in registers we
212 // need to allocate a value type instance and initialize it with
213 // the value of the fields.
214 Label skip, slow_case;
215 // We only need a new buffered value if a new one is not returned
216 __ testptr(rax, 1);
217 __ jcc(Assembler::zero, skip);
218
219 // Try to allocate a new buffered value (from the heap)
220 if (UseTLAB) {
221 __ mov(rbx, rax);
222 __ andptr(rbx, -2);
223
224 __ movl(r14, Address(rbx, Klass::layout_helper_offset()));
225
226 __ movptr(r13, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())));
227 __ lea(r14, Address(r13, r14, Address::times_1));
228 __ cmpptr(r14, Address(r15_thread, in_bytes(JavaThread::tlab_end_offset())));
229 __ jcc(Assembler::above, slow_case);
230 __ movptr(Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())), r14);
231
232 if (UseBiasedLocking) {
233 __ movptr(rax, Address(rbx, Klass::prototype_header_offset()));
234 __ movptr(Address(r13, oopDesc::mark_offset_in_bytes ()), rax);
235 } else {
236 __ movptr(Address(r13, oopDesc::mark_offset_in_bytes ()),
237 (intptr_t)markOopDesc::prototype());
238 }
239 __ xorl(rax, rax); // use zero reg to clear memory (shorter code)
240 __ store_klass_gap(r13, rax); // zero klass gap for compressed oops
241 __ mov(rax, rbx);
242 __ store_klass(r13, rbx); // klass
243
244 // We have our new buffered value, initialize its fields with a
245 // value class specific handler
246 __ movptr(rbx, Address(rax, ValueKlass::pack_handler_offset()));
247 __ mov(rax, r13);
248 __ call(rbx);
249 __ jmp(skip);
250 }
251
252 __ bind(slow_case);
253 // We failed to allocate a new value, fall back to a runtime
254 // call. Some oop field may be live in some registers but we can't
255 // tell. That runtime call will take care of preserving them
256 // across a GC if there's one.
257 __ super_call_VM_leaf(StubRoutines::store_value_type_fields_to_buf());
258 __ bind(skip);
259 #endif
260 }
261
262 __ restore_bcp();
263 __ restore_locals();
264
265 if (state == atos) {
266 Register mdp = rbx;
267 Register tmp = rcx;
268 __ profile_return_type(mdp, rax, tmp);
269 }
270
271 const Register cache = rbx;
272 const Register index = rcx;
273 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
274
275 const Register flags = cache;
276 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
277 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
278 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
279
280 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
281 if (JvmtiExport::can_pop_frame()) {
282 NOT_LP64(__ get_thread(java_thread));
283 __ check_and_handle_popframe(java_thread);
284 }
285 if (JvmtiExport::can_force_early_return()) {
286 NOT_LP64(__ get_thread(java_thread));
287 __ check_and_handle_earlyret(java_thread);
288 }
289
290 __ dispatch_next(state, step);
291
292 return entry;
293 }
294
295
296 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
297 address entry = __ pc();
298
299 #ifndef _LP64
300 if (state == ftos) {
301 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
302 } else if (state == dtos) {
303 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
304 }
305 #endif // _LP64
306
307 // NULL last_sp until next java call
308 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
309 __ restore_bcp();
310 __ restore_locals();
311 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
312 NOT_LP64(__ get_thread(thread));
313 #if INCLUDE_JVMCI
314 // Check if we need to take lock at entry of synchronized method. This can
315 // only occur on method entry so emit it only for vtos with step 0.
316 if ((EnableJVMCI || UseAOT) && state == vtos && step == 0) {
317 Label L;
318 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
319 __ jcc(Assembler::zero, L);
320 // Clear flag.
321 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
322 // Satisfy calling convention for lock_method().
323 __ get_method(rbx);
324 // Take lock.
325 lock_method();
326 __ bind(L);
327 } else {
328 #ifdef ASSERT
329 if (EnableJVMCI) {
330 Label L;
331 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
332 __ jccb(Assembler::zero, L);
333 __ stop("unexpected pending monitor in deopt entry");
334 __ bind(L);
335 }
336 #endif
337 }
338 #endif
339 // handle exceptions
340 {
341 Label L;
342 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
343 __ jcc(Assembler::zero, L);
344 __ call_VM(noreg,
345 CAST_FROM_FN_PTR(address,
346 InterpreterRuntime::throw_pending_exception));
347 __ should_not_reach_here();
348 __ bind(L);
349 }
350 if (continuation == NULL) {
351 __ dispatch_next(state, step);
352 } else {
353 __ jump_to_entry(continuation);
354 }
355 return entry;
356 }
357
358 address TemplateInterpreterGenerator::generate_result_handler_for(
359 BasicType type) {
360 address entry = __ pc();
361 switch (type) {
362 case T_BOOLEAN: __ c2bool(rax); break;
363 #ifndef _LP64
364 case T_CHAR : __ andptr(rax, 0xFFFF); break;
365 #else
366 case T_CHAR : __ movzwl(rax, rax); break;
367 #endif // _LP64
368 case T_BYTE : __ sign_extend_byte(rax); break;
369 case T_SHORT : __ sign_extend_short(rax); break;
370 case T_INT : /* nothing to do */ break;
371 case T_LONG : /* nothing to do */ break;
372 case T_VOID : /* nothing to do */ break;
373 #ifndef _LP64
374 case T_DOUBLE :
375 case T_FLOAT :
376 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
377 __ pop(t); // remove return address first
378 // Must return a result for interpreter or compiler. In SSE
379 // mode, results are returned in xmm0 and the FPU stack must
380 // be empty.
381 if (type == T_FLOAT && UseSSE >= 1) {
382 // Load ST0
383 __ fld_d(Address(rsp, 0));
384 // Store as float and empty fpu stack
385 __ fstp_s(Address(rsp, 0));
386 // and reload
387 __ movflt(xmm0, Address(rsp, 0));
388 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
389 __ movdbl(xmm0, Address(rsp, 0));
390 } else {
391 // restore ST0
392 __ fld_d(Address(rsp, 0));
393 }
394 // and pop the temp
395 __ addptr(rsp, 2 * wordSize);
396 __ push(t); // restore return address
397 }
398 break;
399 #else
400 case T_FLOAT : /* nothing to do */ break;
401 case T_DOUBLE : /* nothing to do */ break;
402 #endif // _LP64
403
404 case T_VALUETYPE: // fall through (value types are handled with oops)
405 case T_OBJECT :
406 // retrieve result from frame
407 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
408 // and verify it
409 __ verify_oop(rax);
410 break;
411 default : ShouldNotReachHere();
412 }
413 __ ret(0); // return from result handler
414 return entry;
415 }
416
417 address TemplateInterpreterGenerator::generate_safept_entry_for(
418 TosState state,
419 address runtime_entry) {
420 address entry = __ pc();
421 __ push(state);
422 __ call_VM(noreg, runtime_entry);
423 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
424 return entry;
425 }
426
427
428
429 // Helpers for commoning out cases in the various type of method entries.
430 //
431
432
433 // increment invocation count & check for overflow
434 //
435 // Note: checking for negative value instead of overflow
436 // so we have a 'sticky' overflow test
437 //
438 // rbx: method
439 // rcx: invocation counter
440 //
441 void TemplateInterpreterGenerator::generate_counter_incr(
442 Label* overflow,
443 Label* profile_method,
444 Label* profile_method_continue) {
445 Label done;
446 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
447 if (TieredCompilation) {
448 int increment = InvocationCounter::count_increment;
449 Label no_mdo;
450 if (ProfileInterpreter) {
451 // Are we profiling?
452 __ movptr(rax, Address(rbx, Method::method_data_offset()));
453 __ testptr(rax, rax);
454 __ jccb(Assembler::zero, no_mdo);
455 // Increment counter in the MDO
456 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
457 in_bytes(InvocationCounter::counter_offset()));
458 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
459 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
460 __ jmp(done);
461 }
462 __ bind(no_mdo);
463 // Increment counter in MethodCounters
464 const Address invocation_counter(rax,
465 MethodCounters::invocation_counter_offset() +
466 InvocationCounter::counter_offset());
467 __ get_method_counters(rbx, rax, done);
468 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
469 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
470 false, Assembler::zero, overflow);
471 __ bind(done);
472 } else { // not TieredCompilation
473 const Address backedge_counter(rax,
474 MethodCounters::backedge_counter_offset() +
475 InvocationCounter::counter_offset());
476 const Address invocation_counter(rax,
477 MethodCounters::invocation_counter_offset() +
478 InvocationCounter::counter_offset());
479
480 __ get_method_counters(rbx, rax, done);
481
482 if (ProfileInterpreter) {
483 __ incrementl(Address(rax,
484 MethodCounters::interpreter_invocation_counter_offset()));
485 }
486 // Update standard invocation counters
487 __ movl(rcx, invocation_counter);
488 __ incrementl(rcx, InvocationCounter::count_increment);
489 __ movl(invocation_counter, rcx); // save invocation count
490
491 __ movl(rax, backedge_counter); // load backedge counter
492 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
493
494 __ addl(rcx, rax); // add both counters
495
496 // profile_method is non-null only for interpreted method so
497 // profile_method != NULL == !native_call
498
499 if (ProfileInterpreter && profile_method != NULL) {
500 // Test to see if we should create a method data oop
501 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
502 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
503 __ jcc(Assembler::less, *profile_method_continue);
504
505 // if no method data exists, go to profile_method
506 __ test_method_data_pointer(rax, *profile_method);
507 }
508
509 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
510 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
511 __ jcc(Assembler::aboveEqual, *overflow);
512 __ bind(done);
513 }
514 }
515
516 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
517
518 // Asm interpreter on entry
519 // r14/rdi - locals
520 // r13/rsi - bcp
521 // rbx - method
522 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
523 // rbp - interpreter frame
524
525 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
526 // Everything as it was on entry
527 // rdx is not restored. Doesn't appear to really be set.
528
529 // InterpreterRuntime::frequency_counter_overflow takes two
530 // arguments, the first (thread) is passed by call_VM, the second
531 // indicates if the counter overflow occurs at a backwards branch
532 // (NULL bcp). We pass zero for it. The call returns the address
533 // of the verified entry point for the method or NULL if the
534 // compilation did not complete (either went background or bailed
535 // out).
536 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
537 __ movl(rarg, 0);
538 __ call_VM(noreg,
539 CAST_FROM_FN_PTR(address,
540 InterpreterRuntime::frequency_counter_overflow),
541 rarg);
542
543 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
544 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
545 // and jump to the interpreted entry.
546 __ jmp(do_continue, relocInfo::none);
547 }
548
549 // See if we've got enough room on the stack for locals plus overhead below
550 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
551 // without going through the signal handler, i.e., reserved and yellow zones
552 // will not be made usable. The shadow zone must suffice to handle the
553 // overflow.
554 // The expression stack grows down incrementally, so the normal guard
555 // page mechanism will work for that.
556 //
557 // NOTE: Since the additional locals are also always pushed (wasn't
558 // obvious in generate_fixed_frame) so the guard should work for them
559 // too.
560 //
561 // Args:
562 // rdx: number of additional locals this frame needs (what we must check)
563 // rbx: Method*
564 //
565 // Kills:
566 // rax
567 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
568
569 // monitor entry size: see picture of stack in frame_x86.hpp
570 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
571
572 // total overhead size: entry_size + (saved rbp through expr stack
573 // bottom). be sure to change this if you add/subtract anything
574 // to/from the overhead area
575 const int overhead_size =
576 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
577
578 const int page_size = os::vm_page_size();
579
580 Label after_frame_check;
581
582 // see if the frame is greater than one page in size. If so,
583 // then we need to verify there is enough stack space remaining
584 // for the additional locals.
585 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
586 __ jcc(Assembler::belowEqual, after_frame_check);
587
588 // compute rsp as if this were going to be the last frame on
589 // the stack before the red zone
590
591 Label after_frame_check_pop;
592 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
593 #ifndef _LP64
594 __ push(thread);
595 __ get_thread(thread);
596 #endif
597
598 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
599
600 // locals + overhead, in bytes
601 __ mov(rax, rdx);
602 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
603 __ addptr(rax, overhead_size);
604
605 #ifdef ASSERT
606 Label limit_okay;
607 // Verify that thread stack overflow limit is non-zero.
608 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
609 __ jcc(Assembler::notEqual, limit_okay);
610 __ stop("stack overflow limit is zero");
611 __ bind(limit_okay);
612 #endif
613
614 // Add locals/frame size to stack limit.
615 __ addptr(rax, stack_limit);
616
617 // Check against the current stack bottom.
618 __ cmpptr(rsp, rax);
619
620 __ jcc(Assembler::above, after_frame_check_pop);
621 NOT_LP64(__ pop(rsi)); // get saved bcp
622
623 // Restore sender's sp as SP. This is necessary if the sender's
624 // frame is an extended compiled frame (see gen_c2i_adapter())
625 // and safer anyway in case of JSR292 adaptations.
626
627 __ pop(rax); // return address must be moved if SP is changed
628 __ mov(rsp, rbcp);
629 __ push(rax);
630
631 // Note: the restored frame is not necessarily interpreted.
632 // Use the shared runtime version of the StackOverflowError.
633 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
634 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
635 // all done with frame size check
636 __ bind(after_frame_check_pop);
637 NOT_LP64(__ pop(rsi));
638
639 // all done with frame size check
640 __ bind(after_frame_check);
641 }
642
643 // Allocate monitor and lock method (asm interpreter)
644 //
645 // Args:
646 // rbx: Method*
647 // r14/rdi: locals
648 //
649 // Kills:
650 // rax
651 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
652 // rscratch1, rscratch2 (scratch regs)
653 void TemplateInterpreterGenerator::lock_method() {
654 // synchronize method
655 const Address access_flags(rbx, Method::access_flags_offset());
656 const Address monitor_block_top(
657 rbp,
658 frame::interpreter_frame_monitor_block_top_offset * wordSize);
659 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
660
661 #ifdef ASSERT
662 {
663 Label L;
664 __ movl(rax, access_flags);
665 __ testl(rax, JVM_ACC_SYNCHRONIZED);
666 __ jcc(Assembler::notZero, L);
667 __ stop("method doesn't need synchronization");
668 __ bind(L);
669 }
670 #endif // ASSERT
671
672 // get synchronization object
673 {
674 Label done;
675 __ movl(rax, access_flags);
676 __ testl(rax, JVM_ACC_STATIC);
677 // get receiver (assume this is frequent case)
678 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
679 __ jcc(Assembler::zero, done);
680 __ load_mirror(rax, rbx);
681
682 #ifdef ASSERT
683 {
684 Label L;
685 __ testptr(rax, rax);
686 __ jcc(Assembler::notZero, L);
687 __ stop("synchronization object is NULL");
688 __ bind(L);
689 }
690 #endif // ASSERT
691
692 __ bind(done);
693 }
694
695 // add space for monitor & lock
696 __ subptr(rsp, entry_size); // add space for a monitor entry
697 __ movptr(monitor_block_top, rsp); // set new monitor block top
698 // store object
699 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
700 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
701 __ movptr(lockreg, rsp); // object address
702 __ lock_object(lockreg);
703 }
704
705 // Generate a fixed interpreter frame. This is identical setup for
706 // interpreted methods and for native methods hence the shared code.
707 //
708 // Args:
709 // rax: return address
710 // rbx: Method*
711 // r14/rdi: pointer to locals
712 // r13/rsi: sender sp
713 // rdx: cp cache
714 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
715 // initialize fixed part of activation frame
716 __ push(rax); // save return address
717 __ enter(); // save old & set new rbp
718 __ push(rbcp); // set sender sp
719 __ push((int)NULL_WORD); // leave last_sp as null
720 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
721 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
722 __ push(rbx); // save Method*
723 // Get mirror and store it in the frame as GC root for this Method*
724 __ load_mirror(rdx, rbx);
725 __ push(rdx);
726 if (ProfileInterpreter) {
727 Label method_data_continue;
728 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
729 __ testptr(rdx, rdx);
730 __ jcc(Assembler::zero, method_data_continue);
731 __ addptr(rdx, in_bytes(MethodData::data_offset()));
732 __ bind(method_data_continue);
733 __ push(rdx); // set the mdp (method data pointer)
734 } else {
735 __ push(0);
736 }
737
738 __ movptr(rdx, Address(rbx, Method::const_offset()));
739 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
740 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
741 __ push(rdx); // set constant pool cache
742 const Register thread1 = NOT_LP64(rdx) LP64_ONLY(r15_thread);
743 NOT_LP64(__ get_thread(thread1));
744 __ movptr(rdx, Address(thread1, JavaThread::vt_alloc_ptr_offset()));
745 __ push(rdx); // value type allocation pointer when activation is created
746 __ push(rlocals); // set locals pointer
747 if (native_call) {
748 __ push(0); // no bcp
749 } else {
750 __ push(rbcp); // set bcp
751 }
752 __ push(0); // reserve word for pointer to expression stack bottom
753 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
754 }
755
756 // End of helpers
757
758 // Method entry for java.lang.ref.Reference.get.
759 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
760 #if INCLUDE_ALL_GCS
761 // Code: _aload_0, _getfield, _areturn
762 // parameter size = 1
763 //
764 // The code that gets generated by this routine is split into 2 parts:
765 // 1. The "intrinsified" code for G1 (or any SATB based GC),
766 // 2. The slow path - which is an expansion of the regular method entry.
767 //
768 // Notes:-
769 // * In the G1 code we do not check whether we need to block for
770 // a safepoint. If G1 is enabled then we must execute the specialized
771 // code for Reference.get (except when the Reference object is null)
772 // so that we can log the value in the referent field with an SATB
773 // update buffer.
774 // If the code for the getfield template is modified so that the
775 // G1 pre-barrier code is executed when the current method is
776 // Reference.get() then going through the normal method entry
777 // will be fine.
778 // * The G1 code can, however, check the receiver object (the instance
779 // of java.lang.Reference) and jump to the slow path if null. If the
780 // Reference object is null then we obviously cannot fetch the referent
781 // and so we don't need to call the G1 pre-barrier. Thus we can use the
782 // regular method entry code to generate the NPE.
783 //
784 // rbx: Method*
785
786 // r13: senderSP must preserve for slow path, set SP to it on fast path
787
788 address entry = __ pc();
789
790 const int referent_offset = java_lang_ref_Reference::referent_offset;
791 guarantee(referent_offset > 0, "referent offset not initialized");
792
793 if (UseG1GC) {
794 Label slow_path;
795 // rbx: method
796
797 // Check if local 0 != NULL
798 // If the receiver is null then it is OK to jump to the slow path.
799 __ movptr(rax, Address(rsp, wordSize));
800
801 __ testptr(rax, rax);
802 __ jcc(Assembler::zero, slow_path);
803
804 // rax: local 0
805 // rbx: method (but can be used as scratch now)
806 // rdx: scratch
807 // rdi: scratch
808
809 // Preserve the sender sp in case the pre-barrier
810 // calls the runtime
811 NOT_LP64(__ push(rsi));
812
813 // Generate the G1 pre-barrier code to log the value of
814 // the referent field in an SATB buffer.
815
816 // Load the value of the referent field.
817 const Address field_address(rax, referent_offset);
818 __ load_heap_oop(rax, field_address);
819
820 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
821 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
822 NOT_LP64(__ get_thread(thread));
823
824 // Generate the G1 pre-barrier code to log the value of
825 // the referent field in an SATB buffer.
826 __ g1_write_barrier_pre(noreg /* obj */,
827 rax /* pre_val */,
828 thread /* thread */,
829 rbx /* tmp */,
830 true /* tosca_live */,
831 true /* expand_call */);
832
833 // _areturn
834 NOT_LP64(__ pop(rsi)); // get sender sp
835 __ pop(rdi); // get return address
836 __ mov(rsp, sender_sp); // set sp to sender sp
837 __ jmp(rdi);
838 __ ret(0);
839
840 // generate a vanilla interpreter entry as the slow path
841 __ bind(slow_path);
842 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
843 return entry;
844 }
845 #endif // INCLUDE_ALL_GCS
846
847 // If G1 is not enabled then attempt to go through the accessor entry point
848 // Reference.get is an accessor
849 return NULL;
850 }
851
852 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
853 // Quick & dirty stack overflow checking: bang the stack & handle trap.
854 // Note that we do the banging after the frame is setup, since the exception
855 // handling code expects to find a valid interpreter frame on the stack.
856 // Doing the banging earlier fails if the caller frame is not an interpreter
857 // frame.
858 // (Also, the exception throwing code expects to unlock any synchronized
859 // method receiever, so do the banging after locking the receiver.)
860
861 // Bang each page in the shadow zone. We can't assume it's been done for
862 // an interpreter frame with greater than a page of locals, so each page
863 // needs to be checked. Only true for non-native.
864 if (UseStackBanging) {
865 const int page_size = os::vm_page_size();
866 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size;
867 const int start_page = native_call ? n_shadow_pages : 1;
868 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
869 __ bang_stack_with_offset(pages*page_size);
870 }
871 }
872 }
873
874 // Interpreter stub for calling a native method. (asm interpreter)
875 // This sets up a somewhat different looking stack for calling the
876 // native method than the typical interpreter frame setup.
877 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
878 // determine code generation flags
879 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
880
881 // rbx: Method*
882 // rbcp: sender sp
883
884 address entry_point = __ pc();
885
886 const Address constMethod (rbx, Method::const_offset());
887 const Address access_flags (rbx, Method::access_flags_offset());
888 const Address size_of_parameters(rcx, ConstMethod::
889 size_of_parameters_offset());
890
891
892 // get parameter size (always needed)
893 __ movptr(rcx, constMethod);
894 __ load_unsigned_short(rcx, size_of_parameters);
895
896 // native calls don't need the stack size check since they have no
897 // expression stack and the arguments are already on the stack and
898 // we only add a handful of words to the stack
899
900 // rbx: Method*
901 // rcx: size of parameters
902 // rbcp: sender sp
903 __ pop(rax); // get return address
904
905 // for natives the size of locals is zero
906
907 // compute beginning of parameters
908 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
909
910 // add 2 zero-initialized slots for native calls
911 // initialize result_handler slot
912 __ push((int) NULL_WORD);
913 // slot for oop temp
914 // (static native method holder mirror/jni oop result)
915 __ push((int) NULL_WORD);
916
917 // initialize fixed part of activation frame
918 generate_fixed_frame(true);
919
920 // make sure method is native & not abstract
921 #ifdef ASSERT
922 __ movl(rax, access_flags);
923 {
924 Label L;
925 __ testl(rax, JVM_ACC_NATIVE);
926 __ jcc(Assembler::notZero, L);
927 __ stop("tried to execute non-native method as native");
928 __ bind(L);
929 }
930 {
931 Label L;
932 __ testl(rax, JVM_ACC_ABSTRACT);
933 __ jcc(Assembler::zero, L);
934 __ stop("tried to execute abstract method in interpreter");
935 __ bind(L);
936 }
937 #endif
938
939 // Since at this point in the method invocation the exception handler
940 // would try to exit the monitor of synchronized methods which hasn't
941 // been entered yet, we set the thread local variable
942 // _do_not_unlock_if_synchronized to true. The remove_activation will
943 // check this flag.
944
945 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
946 NOT_LP64(__ get_thread(thread1));
947 const Address do_not_unlock_if_synchronized(thread1,
948 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
949 __ movbool(do_not_unlock_if_synchronized, true);
950
951 // increment invocation count & check for overflow
952 Label invocation_counter_overflow;
953 if (inc_counter) {
954 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
955 }
956
957 Label continue_after_compile;
958 __ bind(continue_after_compile);
959
960 bang_stack_shadow_pages(true);
961
962 // reset the _do_not_unlock_if_synchronized flag
963 NOT_LP64(__ get_thread(thread1));
964 __ movbool(do_not_unlock_if_synchronized, false);
965
966 // check for synchronized methods
967 // Must happen AFTER invocation_counter check and stack overflow check,
968 // so method is not locked if overflows.
969 if (synchronized) {
970 lock_method();
971 } else {
972 // no synchronization necessary
973 #ifdef ASSERT
974 {
975 Label L;
976 __ movl(rax, access_flags);
977 __ testl(rax, JVM_ACC_SYNCHRONIZED);
978 __ jcc(Assembler::zero, L);
979 __ stop("method needs synchronization");
980 __ bind(L);
981 }
982 #endif
983 }
984
985 // start execution
986 #ifdef ASSERT
987 {
988 Label L;
989 const Address monitor_block_top(rbp,
990 frame::interpreter_frame_monitor_block_top_offset * wordSize);
991 __ movptr(rax, monitor_block_top);
992 __ cmpptr(rax, rsp);
993 __ jcc(Assembler::equal, L);
994 __ stop("broken stack frame setup in interpreter");
995 __ bind(L);
996 }
997 #endif
998
999 // jvmti support
1000 __ notify_method_entry();
1001
1002 // work registers
1003 const Register method = rbx;
1004 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
1005 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
1006
1007 // allocate space for parameters
1008 __ get_method(method);
1009 __ movptr(t, Address(method, Method::const_offset()));
1010 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1011
1012 #ifndef _LP64
1013 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
1014 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
1015 __ subptr(rsp, t);
1016 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
1017 #else
1018 __ shll(t, Interpreter::logStackElementSize);
1019
1020 __ subptr(rsp, t);
1021 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1022 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
1023 #endif // _LP64
1024
1025 // get signature handler
1026 {
1027 Label L;
1028 __ movptr(t, Address(method, Method::signature_handler_offset()));
1029 __ testptr(t, t);
1030 __ jcc(Assembler::notZero, L);
1031 __ call_VM(noreg,
1032 CAST_FROM_FN_PTR(address,
1033 InterpreterRuntime::prepare_native_call),
1034 method);
1035 __ get_method(method);
1036 __ movptr(t, Address(method, Method::signature_handler_offset()));
1037 __ bind(L);
1038 }
1039
1040 // call signature handler
1041 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
1042 "adjust this code");
1043 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
1044 "adjust this code");
1045 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
1046 "adjust this code");
1047
1048 // The generated handlers do not touch RBX (the method oop).
1049 // However, large signatures cannot be cached and are generated
1050 // each time here. The slow-path generator can do a GC on return,
1051 // so we must reload it after the call.
1052 __ call(t);
1053 __ get_method(method); // slow path can do a GC, reload RBX
1054
1055
1056 // result handler is in rax
1057 // set result handler
1058 __ movptr(Address(rbp,
1059 (frame::interpreter_frame_result_handler_offset) * wordSize),
1060 rax);
1061
1062 // pass mirror handle if static call
1063 {
1064 Label L;
1065 __ movl(t, Address(method, Method::access_flags_offset()));
1066 __ testl(t, JVM_ACC_STATIC);
1067 __ jcc(Assembler::zero, L);
1068 // get mirror
1069 __ load_mirror(t, method);
1070 // copy mirror into activation frame
1071 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
1072 t);
1073 // pass handle to mirror
1074 #ifndef _LP64
1075 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1076 __ movptr(Address(rsp, wordSize), t);
1077 #else
1078 __ lea(c_rarg1,
1079 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1080 #endif // _LP64
1081 __ bind(L);
1082 }
1083
1084 // get native function entry point
1085 {
1086 Label L;
1087 __ movptr(rax, Address(method, Method::native_function_offset()));
1088 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1089 __ cmpptr(rax, unsatisfied.addr());
1090 __ jcc(Assembler::notEqual, L);
1091 __ call_VM(noreg,
1092 CAST_FROM_FN_PTR(address,
1093 InterpreterRuntime::prepare_native_call),
1094 method);
1095 __ get_method(method);
1096 __ movptr(rax, Address(method, Method::native_function_offset()));
1097 __ bind(L);
1098 }
1099
1100 // pass JNIEnv
1101 #ifndef _LP64
1102 __ get_thread(thread);
1103 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1104 __ movptr(Address(rsp, 0), t);
1105
1106 // set_last_Java_frame_before_call
1107 // It is enough that the pc()
1108 // points into the right code segment. It does not have to be the correct return pc.
1109 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1110 #else
1111 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1112
1113 // It is enough that the pc() points into the right code
1114 // segment. It does not have to be the correct return pc.
1115 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1116 #endif // _LP64
1117
1118 // change thread state
1119 #ifdef ASSERT
1120 {
1121 Label L;
1122 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1123 __ cmpl(t, _thread_in_Java);
1124 __ jcc(Assembler::equal, L);
1125 __ stop("Wrong thread state in native stub");
1126 __ bind(L);
1127 }
1128 #endif
1129
1130 // Change state to native
1131
1132 __ movl(Address(thread, JavaThread::thread_state_offset()),
1133 _thread_in_native);
1134
1135 // Call the native method.
1136 __ call(rax);
1137 // 32: result potentially in rdx:rax or ST0
1138 // 64: result potentially in rax or xmm0
1139
1140 // Verify or restore cpu control state after JNI call
1141 __ restore_cpu_control_state_after_jni();
1142
1143 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1144 // in order to extract the result of a method call. If the order of these
1145 // pushes change or anything else is added to the stack then the code in
1146 // interpreter_frame_result must also change.
1147
1148 #ifndef _LP64
1149 // save potential result in ST(0) & rdx:rax
1150 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1151 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1152 // It is safe to do this push because state is _thread_in_native and return address will be found
1153 // via _last_native_pc and not via _last_jave_sp
1154
1155 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1156 // If the order changes or anything else is added to the stack the code in
1157 // interpreter_frame_result will have to be changed.
1158
1159 { Label L;
1160 Label push_double;
1161 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1162 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1163 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1164 float_handler.addr());
1165 __ jcc(Assembler::equal, push_double);
1166 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1167 double_handler.addr());
1168 __ jcc(Assembler::notEqual, L);
1169 __ bind(push_double);
1170 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1171 __ bind(L);
1172 }
1173 #else
1174 __ push(dtos);
1175 #endif // _LP64
1176
1177 __ push(ltos);
1178
1179 // change thread state
1180 NOT_LP64(__ get_thread(thread));
1181 __ movl(Address(thread, JavaThread::thread_state_offset()),
1182 _thread_in_native_trans);
1183
1184 if (os::is_MP()) {
1185 if (UseMembar) {
1186 // Force this write out before the read below
1187 __ membar(Assembler::Membar_mask_bits(
1188 Assembler::LoadLoad | Assembler::LoadStore |
1189 Assembler::StoreLoad | Assembler::StoreStore));
1190 } else {
1191 // Write serialization page so VM thread can do a pseudo remote membar.
1192 // We use the current thread pointer to calculate a thread specific
1193 // offset to write to within the page. This minimizes bus traffic
1194 // due to cache line collision.
1195 __ serialize_memory(thread, rcx);
1196 }
1197 }
1198
1199 #ifndef _LP64
1200 if (AlwaysRestoreFPU) {
1201 // Make sure the control word is correct.
1202 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1203 }
1204 #endif // _LP64
1205
1206 // check for safepoint operation in progress and/or pending suspend requests
1207 {
1208 Label Continue;
1209 Label slow_path;
1210
1211 #ifndef _LP64
1212 __ safepoint_poll(slow_path, thread, noreg);
1213 #else
1214 __ safepoint_poll(slow_path, r15_thread, rscratch1);
1215 #endif
1216
1217 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1218 __ jcc(Assembler::equal, Continue);
1219 __ bind(slow_path);
1220
1221 // Don't use call_VM as it will see a possible pending exception
1222 // and forward it and never return here preventing us from
1223 // clearing _last_native_pc down below. Also can't use
1224 // call_VM_leaf either as it will check to see if r13 & r14 are
1225 // preserved and correspond to the bcp/locals pointers. So we do a
1226 // runtime call by hand.
1227 //
1228 #ifndef _LP64
1229 __ push(thread);
1230 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1231 JavaThread::check_special_condition_for_native_trans)));
1232 __ increment(rsp, wordSize);
1233 __ get_thread(thread);
1234 #else
1235 __ mov(c_rarg0, r15_thread);
1236 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1237 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1238 __ andptr(rsp, -16); // align stack as required by ABI
1239 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1240 __ mov(rsp, r12); // restore sp
1241 __ reinit_heapbase();
1242 #endif // _LP64
1243 __ bind(Continue);
1244 }
1245
1246 // change thread state
1247 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1248
1249 // reset_last_Java_frame
1250 __ reset_last_Java_frame(thread, true);
1251
1252 if (CheckJNICalls) {
1253 // clear_pending_jni_exception_check
1254 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1255 }
1256
1257 // reset handle block
1258 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1259 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1260
1261 // If result is an oop unbox and store it in frame where gc will see it
1262 // and result handler will pick it up
1263
1264 {
1265 Label no_oop, not_weak, store_result;
1266 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1267 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1268 __ jcc(Assembler::notEqual, no_oop);
1269 // retrieve result
1270 __ pop(ltos);
1271 // Unbox oop result, e.g. JNIHandles::resolve value.
1272 __ resolve_jobject(rax /* value */,
1273 thread /* thread */,
1274 t /* tmp */);
1275 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1276 // keep stack depth as expected by pushing oop which will eventually be discarded
1277 __ push(ltos);
1278 __ bind(no_oop);
1279 }
1280
1281
1282 {
1283 Label no_reguard;
1284 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1285 JavaThread::stack_guard_yellow_reserved_disabled);
1286 __ jcc(Assembler::notEqual, no_reguard);
1287
1288 __ pusha(); // XXX only save smashed registers
1289 #ifndef _LP64
1290 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1291 __ popa();
1292 #else
1293 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1294 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1295 __ andptr(rsp, -16); // align stack as required by ABI
1296 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1297 __ mov(rsp, r12); // restore sp
1298 __ popa(); // XXX only restore smashed registers
1299 __ reinit_heapbase();
1300 #endif // _LP64
1301
1302 __ bind(no_reguard);
1303 }
1304
1305
1306 // The method register is junk from after the thread_in_native transition
1307 // until here. Also can't call_VM until the bcp has been
1308 // restored. Need bcp for throwing exception below so get it now.
1309 __ get_method(method);
1310
1311 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1312 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1313 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1314
1315 // handle exceptions (exception handling will handle unlocking!)
1316 {
1317 Label L;
1318 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1319 __ jcc(Assembler::zero, L);
1320 // Note: At some point we may want to unify this with the code
1321 // used in call_VM_base(); i.e., we should use the
1322 // StubRoutines::forward_exception code. For now this doesn't work
1323 // here because the rsp is not correctly set at this point.
1324 __ MacroAssembler::call_VM(noreg,
1325 CAST_FROM_FN_PTR(address,
1326 InterpreterRuntime::throw_pending_exception));
1327 __ should_not_reach_here();
1328 __ bind(L);
1329 }
1330
1331 // do unlocking if necessary
1332 {
1333 Label L;
1334 __ movl(t, Address(method, Method::access_flags_offset()));
1335 __ testl(t, JVM_ACC_SYNCHRONIZED);
1336 __ jcc(Assembler::zero, L);
1337 // the code below should be shared with interpreter macro
1338 // assembler implementation
1339 {
1340 Label unlock;
1341 // BasicObjectLock will be first in list, since this is a
1342 // synchronized method. However, need to check that the object
1343 // has not been unlocked by an explicit monitorexit bytecode.
1344 const Address monitor(rbp,
1345 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1346 wordSize - (int)sizeof(BasicObjectLock)));
1347
1348 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1349
1350 // monitor expect in c_rarg1 for slow unlock path
1351 __ lea(regmon, monitor); // address of first monitor
1352
1353 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1354 __ testptr(t, t);
1355 __ jcc(Assembler::notZero, unlock);
1356
1357 // Entry already unlocked, need to throw exception
1358 __ MacroAssembler::call_VM(noreg,
1359 CAST_FROM_FN_PTR(address,
1360 InterpreterRuntime::throw_illegal_monitor_state_exception));
1361 __ should_not_reach_here();
1362
1363 __ bind(unlock);
1364 __ unlock_object(regmon);
1365 }
1366 __ bind(L);
1367 }
1368
1369 // jvmti support
1370 // Note: This must happen _after_ handling/throwing any exceptions since
1371 // the exception handler code notifies the runtime of method exits
1372 // too. If this happens before, method entry/exit notifications are
1373 // not properly paired (was bug - gri 11/22/99).
1374 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1375
1376 // restore potential result in edx:eax, call result handler to
1377 // restore potential result in ST0 & handle result
1378
1379 __ pop(ltos);
1380 LP64_ONLY( __ pop(dtos));
1381
1382 __ movptr(t, Address(rbp,
1383 (frame::interpreter_frame_result_handler_offset) * wordSize));
1384 __ call(t);
1385
1386 // remove activation
1387 __ movptr(t, Address(rbp,
1388 frame::interpreter_frame_sender_sp_offset *
1389 wordSize)); // get sender sp
1390 __ leave(); // remove frame anchor
1391 __ pop(rdi); // get return address
1392 __ mov(rsp, t); // set sp to sender sp
1393 __ jmp(rdi);
1394
1395 if (inc_counter) {
1396 // Handle overflow of counter and compile method
1397 __ bind(invocation_counter_overflow);
1398 generate_counter_overflow(continue_after_compile);
1399 }
1400
1401 return entry_point;
1402 }
1403
1404 // Abstract method entry
1405 // Attempt to execute abstract method. Throw exception
1406 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1407
1408 address entry_point = __ pc();
1409
1410 // abstract method entry
1411
1412 // pop return address, reset last_sp to NULL
1413 __ empty_expression_stack();
1414 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1415 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1416
1417 // throw exception
1418 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
1419 // the call_VM checks for exception, so we should never return here.
1420 __ should_not_reach_here();
1421
1422 return entry_point;
1423 }
1424
1425 //
1426 // Generic interpreted method entry to (asm) interpreter
1427 //
1428 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1429 // determine code generation flags
1430 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1431
1432 // ebx: Method*
1433 // rbcp: sender sp
1434 address entry_point = __ pc();
1435
1436 const Address constMethod(rbx, Method::const_offset());
1437 const Address access_flags(rbx, Method::access_flags_offset());
1438 const Address size_of_parameters(rdx,
1439 ConstMethod::size_of_parameters_offset());
1440 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1441
1442
1443 // get parameter size (always needed)
1444 __ movptr(rdx, constMethod);
1445 __ load_unsigned_short(rcx, size_of_parameters);
1446
1447 // rbx: Method*
1448 // rcx: size of parameters
1449 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1450
1451 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1452 __ subl(rdx, rcx); // rdx = no. of additional locals
1453
1454 // YYY
1455 // __ incrementl(rdx);
1456 // __ andl(rdx, -2);
1457
1458 // see if we've got enough room on the stack for locals plus overhead.
1459 generate_stack_overflow_check();
1460
1461 // get return address
1462 __ pop(rax);
1463
1464 // compute beginning of parameters
1465 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1466
1467 // rdx - # of additional locals
1468 // allocate space for locals
1469 // explicitly initialize locals
1470 {
1471 Label exit, loop;
1472 __ testl(rdx, rdx);
1473 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1474 __ bind(loop);
1475 __ push((int) NULL_WORD); // initialize local variables
1476 __ decrementl(rdx); // until everything initialized
1477 __ jcc(Assembler::greater, loop);
1478 __ bind(exit);
1479 }
1480
1481 // initialize fixed part of activation frame
1482 generate_fixed_frame(false);
1483
1484 // make sure method is not native & not abstract
1485 #ifdef ASSERT
1486 __ movl(rax, access_flags);
1487 {
1488 Label L;
1489 __ testl(rax, JVM_ACC_NATIVE);
1490 __ jcc(Assembler::zero, L);
1491 __ stop("tried to execute native method as non-native");
1492 __ bind(L);
1493 }
1494 {
1495 Label L;
1496 __ testl(rax, JVM_ACC_ABSTRACT);
1497 __ jcc(Assembler::zero, L);
1498 __ stop("tried to execute abstract method in interpreter");
1499 __ bind(L);
1500 }
1501 #endif
1502
1503 // Since at this point in the method invocation the exception
1504 // handler would try to exit the monitor of synchronized methods
1505 // which hasn't been entered yet, we set the thread local variable
1506 // _do_not_unlock_if_synchronized to true. The remove_activation
1507 // will check this flag.
1508
1509 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1510 NOT_LP64(__ get_thread(thread));
1511 const Address do_not_unlock_if_synchronized(thread,
1512 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1513 __ movbool(do_not_unlock_if_synchronized, true);
1514
1515 __ profile_parameters_type(rax, rcx, rdx);
1516 // increment invocation count & check for overflow
1517 Label invocation_counter_overflow;
1518 Label profile_method;
1519 Label profile_method_continue;
1520 if (inc_counter) {
1521 generate_counter_incr(&invocation_counter_overflow,
1522 &profile_method,
1523 &profile_method_continue);
1524 if (ProfileInterpreter) {
1525 __ bind(profile_method_continue);
1526 }
1527 }
1528
1529 Label continue_after_compile;
1530 __ bind(continue_after_compile);
1531
1532 // check for synchronized interpreted methods
1533 bang_stack_shadow_pages(false);
1534
1535 // reset the _do_not_unlock_if_synchronized flag
1536 NOT_LP64(__ get_thread(thread));
1537 __ movbool(do_not_unlock_if_synchronized, false);
1538
1539 // check for synchronized methods
1540 // Must happen AFTER invocation_counter check and stack overflow check,
1541 // so method is not locked if overflows.
1542 if (synchronized) {
1543 // Allocate monitor and lock method
1544 lock_method();
1545 } else {
1546 // no synchronization necessary
1547 #ifdef ASSERT
1548 {
1549 Label L;
1550 __ movl(rax, access_flags);
1551 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1552 __ jcc(Assembler::zero, L);
1553 __ stop("method needs synchronization");
1554 __ bind(L);
1555 }
1556 #endif
1557 }
1558
1559 // start execution
1560 #ifdef ASSERT
1561 {
1562 Label L;
1563 const Address monitor_block_top (rbp,
1564 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1565 __ movptr(rax, monitor_block_top);
1566 __ cmpptr(rax, rsp);
1567 __ jcc(Assembler::equal, L);
1568 __ stop("broken stack frame setup in interpreter");
1569 __ bind(L);
1570 }
1571 #endif
1572
1573 // jvmti support
1574 __ notify_method_entry();
1575
1576 __ dispatch_next(vtos);
1577
1578 // invocation counter overflow
1579 if (inc_counter) {
1580 if (ProfileInterpreter) {
1581 // We have decided to profile this method in the interpreter
1582 __ bind(profile_method);
1583 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1584 __ set_method_data_pointer_for_bcp();
1585 __ get_method(rbx);
1586 __ jmp(profile_method_continue);
1587 }
1588 // Handle overflow of counter and compile method
1589 __ bind(invocation_counter_overflow);
1590 generate_counter_overflow(continue_after_compile);
1591 }
1592
1593 return entry_point;
1594 }
1595
1596 //-----------------------------------------------------------------------------
1597 // Exceptions
1598
1599 void TemplateInterpreterGenerator::generate_throw_exception() {
1600 // Entry point in previous activation (i.e., if the caller was
1601 // interpreted)
1602 Interpreter::_rethrow_exception_entry = __ pc();
1603 // Restore sp to interpreter_frame_last_sp even though we are going
1604 // to empty the expression stack for the exception processing.
1605 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1606 // rax: exception
1607 // rdx: return address/pc that threw exception
1608 __ restore_bcp(); // r13/rsi points to call/send
1609 __ restore_locals();
1610 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1611 // Entry point for exceptions thrown within interpreter code
1612 Interpreter::_throw_exception_entry = __ pc();
1613 // expression stack is undefined here
1614 // rax: exception
1615 // r13/rsi: exception bcp
1616 __ verify_oop(rax);
1617 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1618 LP64_ONLY(__ mov(c_rarg1, rax));
1619
1620 // expression stack must be empty before entering the VM in case of
1621 // an exception
1622 __ empty_expression_stack();
1623 // find exception handler address and preserve exception oop
1624 __ call_VM(rdx,
1625 CAST_FROM_FN_PTR(address,
1626 InterpreterRuntime::exception_handler_for_exception),
1627 rarg);
1628 // rax: exception handler entry point
1629 // rdx: preserved exception oop
1630 // r13/rsi: bcp for exception handler
1631 __ push_ptr(rdx); // push exception which is now the only value on the stack
1632 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1633
1634 // If the exception is not handled in the current frame the frame is
1635 // removed and the exception is rethrown (i.e. exception
1636 // continuation is _rethrow_exception).
1637 //
1638 // Note: At this point the bci is still the bxi for the instruction
1639 // which caused the exception and the expression stack is
1640 // empty. Thus, for any VM calls at this point, GC will find a legal
1641 // oop map (with empty expression stack).
1642
1643 // In current activation
1644 // tos: exception
1645 // esi: exception bcp
1646
1647 //
1648 // JVMTI PopFrame support
1649 //
1650
1651 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1652 __ empty_expression_stack();
1653 // Set the popframe_processing bit in pending_popframe_condition
1654 // indicating that we are currently handling popframe, so that
1655 // call_VMs that may happen later do not trigger new popframe
1656 // handling cycles.
1657 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1658 NOT_LP64(__ get_thread(thread));
1659 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1660 __ orl(rdx, JavaThread::popframe_processing_bit);
1661 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1662
1663 {
1664 // Check to see whether we are returning to a deoptimized frame.
1665 // (The PopFrame call ensures that the caller of the popped frame is
1666 // either interpreted or compiled and deoptimizes it if compiled.)
1667 // In this case, we can't call dispatch_next() after the frame is
1668 // popped, but instead must save the incoming arguments and restore
1669 // them after deoptimization has occurred.
1670 //
1671 // Note that we don't compare the return PC against the
1672 // deoptimization blob's unpack entry because of the presence of
1673 // adapter frames in C2.
1674 Label caller_not_deoptimized;
1675 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1676 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1677 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1678 InterpreterRuntime::interpreter_contains), rarg);
1679 __ testl(rax, rax);
1680 __ jcc(Assembler::notZero, caller_not_deoptimized);
1681
1682 // Compute size of arguments for saving when returning to
1683 // deoptimized caller
1684 __ get_method(rax);
1685 __ movptr(rax, Address(rax, Method::const_offset()));
1686 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1687 size_of_parameters_offset())));
1688 __ shll(rax, Interpreter::logStackElementSize);
1689 __ restore_locals();
1690 __ subptr(rlocals, rax);
1691 __ addptr(rlocals, wordSize);
1692 // Save these arguments
1693 NOT_LP64(__ get_thread(thread));
1694 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1695 Deoptimization::
1696 popframe_preserve_args),
1697 thread, rax, rlocals);
1698
1699 __ remove_activation(vtos, rdx,
1700 /* throw_monitor_exception */ false,
1701 /* install_monitor_exception */ false,
1702 /* notify_jvmdi */ false);
1703
1704 // Inform deoptimization that it is responsible for restoring
1705 // these arguments
1706 NOT_LP64(__ get_thread(thread));
1707 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1708 JavaThread::popframe_force_deopt_reexecution_bit);
1709
1710 // Continue in deoptimization handler
1711 __ jmp(rdx);
1712
1713 __ bind(caller_not_deoptimized);
1714 }
1715
1716 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1717 /* throw_monitor_exception */ false,
1718 /* install_monitor_exception */ false,
1719 /* notify_jvmdi */ false);
1720
1721 // Finish with popframe handling
1722 // A previous I2C followed by a deoptimization might have moved the
1723 // outgoing arguments further up the stack. PopFrame expects the
1724 // mutations to those outgoing arguments to be preserved and other
1725 // constraints basically require this frame to look exactly as
1726 // though it had previously invoked an interpreted activation with
1727 // no space between the top of the expression stack (current
1728 // last_sp) and the top of stack. Rather than force deopt to
1729 // maintain this kind of invariant all the time we call a small
1730 // fixup routine to move the mutated arguments onto the top of our
1731 // expression stack if necessary.
1732 #ifndef _LP64
1733 __ mov(rax, rsp);
1734 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1735 __ get_thread(thread);
1736 // PC must point into interpreter here
1737 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1738 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1739 __ get_thread(thread);
1740 #else
1741 __ mov(c_rarg1, rsp);
1742 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1743 // PC must point into interpreter here
1744 __ set_last_Java_frame(noreg, rbp, __ pc());
1745 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1746 #endif
1747 __ reset_last_Java_frame(thread, true);
1748
1749 // Restore the last_sp and null it out
1750 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1751 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1752
1753 __ restore_bcp();
1754 __ restore_locals();
1755 // The method data pointer was incremented already during
1756 // call profiling. We have to restore the mdp for the current bcp.
1757 if (ProfileInterpreter) {
1758 __ set_method_data_pointer_for_bcp();
1759 }
1760
1761 // Clear the popframe condition flag
1762 NOT_LP64(__ get_thread(thread));
1763 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1764 JavaThread::popframe_inactive);
1765
1766 #if INCLUDE_JVMTI
1767 {
1768 Label L_done;
1769 const Register local0 = rlocals;
1770
1771 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1772 __ jcc(Assembler::notEqual, L_done);
1773
1774 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1775 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1776
1777 __ get_method(rdx);
1778 __ movptr(rax, Address(local0, 0));
1779 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1780
1781 __ testptr(rax, rax);
1782 __ jcc(Assembler::zero, L_done);
1783
1784 __ movptr(Address(rbx, 0), rax);
1785 __ bind(L_done);
1786 }
1787 #endif // INCLUDE_JVMTI
1788
1789 __ dispatch_next(vtos);
1790 // end of PopFrame support
1791
1792 Interpreter::_remove_activation_entry = __ pc();
1793
1794 // preserve exception over this code sequence
1795 __ pop_ptr(rax);
1796 NOT_LP64(__ get_thread(thread));
1797 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1798 // remove the activation (without doing throws on illegalMonitorExceptions)
1799 __ remove_activation(vtos, rdx, false, true, false);
1800 // restore exception
1801 NOT_LP64(__ get_thread(thread));
1802 __ get_vm_result(rax, thread);
1803
1804 // In between activations - previous activation type unknown yet
1805 // compute continuation point - the continuation point expects the
1806 // following registers set up:
1807 //
1808 // rax: exception
1809 // rdx: return address/pc that threw exception
1810 // rsp: expression stack of caller
1811 // rbp: ebp of caller
1812 __ push(rax); // save exception
1813 __ push(rdx); // save return address
1814 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1815 SharedRuntime::exception_handler_for_return_address),
1816 thread, rdx);
1817 __ mov(rbx, rax); // save exception handler
1818 __ pop(rdx); // restore return address
1819 __ pop(rax); // restore exception
1820 // Note that an "issuing PC" is actually the next PC after the call
1821 __ jmp(rbx); // jump to exception
1822 // handler of caller
1823 }
1824
1825
1826 //
1827 // JVMTI ForceEarlyReturn support
1828 //
1829 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1830 address entry = __ pc();
1831
1832 __ restore_bcp();
1833 __ restore_locals();
1834 __ empty_expression_stack();
1835 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1836
1837 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1838 NOT_LP64(__ get_thread(thread));
1839 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1840 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1841
1842 // Clear the earlyret state
1843 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1844
1845 __ remove_activation(state, rsi,
1846 false, /* throw_monitor_exception */
1847 false, /* install_monitor_exception */
1848 true); /* notify_jvmdi */
1849 __ jmp(rsi);
1850
1851 return entry;
1852 } // end of ForceEarlyReturn support
1853
1854
1855 //-----------------------------------------------------------------------------
1856 // Helper for vtos entry point generation
1857
1858 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1859 address& bep,
1860 address& cep,
1861 address& sep,
1862 address& aep,
1863 address& iep,
1864 address& lep,
1865 address& fep,
1866 address& dep,
1867 address& vep) {
1868 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1869 Label L;
1870 aep = __ pc(); __ push_ptr(); __ jmp(L);
1871 #ifndef _LP64
1872 fep = __ pc(); __ push(ftos); __ jmp(L);
1873 dep = __ pc(); __ push(dtos); __ jmp(L);
1874 #else
1875 fep = __ pc(); __ push_f(xmm0); __ jmp(L);
1876 dep = __ pc(); __ push_d(xmm0); __ jmp(L);
1877 #endif // _LP64
1878 lep = __ pc(); __ push_l(); __ jmp(L);
1879 bep = cep = sep =
1880 iep = __ pc(); __ push_i();
1881 vep = __ pc();
1882 __ bind(L);
1883 generate_and_dispatch(t);
1884 }
1885
1886 //-----------------------------------------------------------------------------
1887
1888 // Non-product code
1889 #ifndef PRODUCT
1890
1891 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1892 address entry = __ pc();
1893
1894 #ifndef _LP64
1895 // prepare expression stack
1896 __ pop(rcx); // pop return address so expression stack is 'pure'
1897 __ push(state); // save tosca
1898
1899 // pass tosca registers as arguments & call tracer
1900 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1901 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1902 __ pop(state); // restore tosca
1903
1904 // return
1905 __ jmp(rcx);
1906 #else
1907 __ push(state);
1908 __ push(c_rarg0);
1909 __ push(c_rarg1);
1910 __ push(c_rarg2);
1911 __ push(c_rarg3);
1912 __ mov(c_rarg2, rax); // Pass itos
1913 #ifdef _WIN64
1914 __ movflt(xmm3, xmm0); // Pass ftos
1915 #endif
1916 __ call_VM(noreg,
1917 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1918 c_rarg1, c_rarg2, c_rarg3);
1919 __ pop(c_rarg3);
1920 __ pop(c_rarg2);
1921 __ pop(c_rarg1);
1922 __ pop(c_rarg0);
1923 __ pop(state);
1924 __ ret(0); // return from result handler
1925 #endif // _LP64
1926
1927 return entry;
1928 }
1929
1930 void TemplateInterpreterGenerator::count_bytecode() {
1931 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1932 }
1933
1934 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1935 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1936 }
1937
1938 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1939 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1940 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1941 __ orl(rbx,
1942 ((int) t->bytecode()) <<
1943 BytecodePairHistogram::log2_number_of_codes);
1944 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1945 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1946 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1947 }
1948
1949
1950 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1951 // Call a little run-time stub to avoid blow-up for each bytecode.
1952 // The run-time runtime saves the right registers, depending on
1953 // the tosca in-state for the given template.
1954
1955 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1956 "entry must have been generated");
1957 #ifndef _LP64
1958 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1959 #else
1960 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1961 __ andptr(rsp, -16); // align stack as required by ABI
1962 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1963 __ mov(rsp, r12); // restore sp
1964 __ reinit_heapbase();
1965 #endif // _LP64
1966 }
1967
1968
1969 void TemplateInterpreterGenerator::stop_interpreter_at() {
1970 Label L;
1971 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1972 StopInterpreterAt);
1973 __ jcc(Assembler::notEqual, L);
1974 __ int3();
1975 __ bind(L);
1976 }
1977 #endif // !PRODUCT