1 /*
2 * Copyright (c) 2003, 2016, 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 "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/synchronizer.hpp"
45 #include "runtime/timer.hpp"
46 #include "runtime/vframeArray.hpp"
47 #include "utilities/debug.hpp"
48 #include "utilities/macros.hpp"
49
50 #define __ _masm->
51
52 // Size of interpreter code. Increase if too small. Interpreter will
53 // fail with a guarantee ("not enough space for interpreter generation");
54 // if too small.
55 // Run with +PrintInterpreter to get the VM to print out the size.
56 // Max size with JVMTI
57 #ifdef AMD64
58 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(268) NOT_JVMCI(256) * 1024;
59 #else
60 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
61 #endif // AMD64
62
63 // Global Register Names
64 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
65 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
66
67 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
68 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
69 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
70
71
72 //-----------------------------------------------------------------------------
73
74 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
75 address entry = __ pc();
76
77 #ifdef ASSERT
78 {
79 Label L;
80 __ lea(rax, Address(rbp,
81 frame::interpreter_frame_monitor_block_top_offset *
82 wordSize));
83 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
84 // grows negative)
85 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
86 __ stop ("interpreter frame not set up");
87 __ bind(L);
88 }
89 #endif // ASSERT
90 // Restore bcp under the assumption that the current frame is still
91 // interpreted
92 __ restore_bcp();
93
94 // expression stack must be empty before entering the VM if an
95 // exception happened
96 __ empty_expression_stack();
97 // throw exception
98 __ call_VM(noreg,
99 CAST_FROM_FN_PTR(address,
100 InterpreterRuntime::throw_StackOverflowError));
101 return entry;
102 }
103
104 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
105 const char* name) {
106 address entry = __ pc();
107 // expression stack must be empty before entering the VM if an
108 // exception happened
109 __ empty_expression_stack();
110 // setup parameters
111 // ??? convention: expect aberrant index in register ebx
112 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
113 __ lea(rarg, ExternalAddress((address)name));
114 __ call_VM(noreg,
115 CAST_FROM_FN_PTR(address,
116 InterpreterRuntime::
117 throw_ArrayIndexOutOfBoundsException),
118 rarg, rbx);
119 return entry;
120 }
121
122 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
123 address entry = __ pc();
124
125 // object is at TOS
126 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
127 __ pop(rarg);
128
129 // expression stack must be empty before entering the VM if an
130 // exception happened
131 __ empty_expression_stack();
132
133 __ call_VM(noreg,
134 CAST_FROM_FN_PTR(address,
135 InterpreterRuntime::
136 throw_ClassCastException),
137 rarg);
138 return entry;
139 }
140
141 address TemplateInterpreterGenerator::generate_exception_handler_common(
142 const char* name, const char* message, bool pass_oop) {
143 assert(!pass_oop || message == NULL, "either oop or message but not both");
144 address entry = __ pc();
145
146 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
147 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
148
149 if (pass_oop) {
150 // object is at TOS
151 __ pop(rarg2);
152 }
153 // expression stack must be empty before entering the VM if an
154 // exception happened
155 __ empty_expression_stack();
156 // setup parameters
157 __ lea(rarg, ExternalAddress((address)name));
158 if (pass_oop) {
159 __ call_VM(rax, CAST_FROM_FN_PTR(address,
160 InterpreterRuntime::
161 create_klass_exception),
162 rarg, rarg2);
163 } else {
164 __ lea(rarg2, ExternalAddress((address)message));
165 __ call_VM(rax,
166 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
167 rarg, rarg2);
168 }
169 // throw exception
170 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
171 return entry;
172 }
173
174 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
175 address entry = __ pc();
176
177 #ifndef _LP64
178 #ifdef COMPILER2
179 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
180 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
181 for (int i = 1; i < 8; i++) {
182 __ ffree(i);
183 }
184 } else if (UseSSE < 2) {
185 __ empty_FPU_stack();
186 }
187 #endif // COMPILER2
188 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
189 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
190 } else {
191 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
192 }
193
194 if (state == ftos) {
195 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
196 } else if (state == dtos) {
197 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
198 }
199 #endif // _LP64
200
201 // Restore stack bottom in case i2c adjusted stack
202 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
203 // and NULL it as marker that esp is now tos until next java call
204 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
205
206 __ restore_bcp();
207 __ restore_locals();
208
209 if (state == atos) {
210 Register mdp = rbx;
211 Register tmp = rcx;
212 __ profile_return_type(mdp, rax, tmp);
213 }
214
215 const Register cache = rbx;
216 const Register index = rcx;
217 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
218
219 const Register flags = cache;
220 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
221 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
222 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
223 __ dispatch_next(state, step);
224
225 return entry;
226 }
227
228
229 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
230 address entry = __ pc();
231
232 #ifndef _LP64
233 if (state == ftos) {
234 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
235 } else if (state == dtos) {
236 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
237 }
238 #endif // _LP64
239
240 // NULL last_sp until next java call
241 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
242 __ restore_bcp();
243 __ restore_locals();
244 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
245 NOT_LP64(__ get_thread(thread));
246 #if INCLUDE_JVMCI
247 // Check if we need to take lock at entry of synchronized method. This can
248 // only occur on method entry so emit it only for vtos with step 0.
249 if (UseJVMCICompiler && state == vtos && step == 0) {
250 Label L;
251 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
252 __ jcc(Assembler::zero, L);
253 // Clear flag.
254 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
255 // Satisfy calling convention for lock_method().
256 __ get_method(rbx);
257 // Take lock.
258 lock_method();
259 __ bind(L);
260 } else {
261 #ifdef ASSERT
262 if (UseJVMCICompiler) {
263 Label L;
264 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
265 __ jccb(Assembler::zero, L);
266 __ stop("unexpected pending monitor in deopt entry");
267 __ bind(L);
268 }
269 #endif
270 }
271 #endif
272 // handle exceptions
273 {
274 Label L;
275 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
276 __ jcc(Assembler::zero, L);
277 __ call_VM(noreg,
278 CAST_FROM_FN_PTR(address,
279 InterpreterRuntime::throw_pending_exception));
280 __ should_not_reach_here();
281 __ bind(L);
282 }
283 __ dispatch_next(state, step);
284 return entry;
285 }
286
287 address TemplateInterpreterGenerator::generate_result_handler_for(
288 BasicType type) {
289 address entry = __ pc();
290 switch (type) {
291 case T_BOOLEAN: __ c2bool(rax); break;
292 #ifndef _LP64
293 case T_CHAR : __ andptr(rax, 0xFFFF); break;
294 #else
295 case T_CHAR : __ movzwl(rax, rax); break;
296 #endif // _LP64
297 case T_BYTE : __ sign_extend_byte(rax); break;
298 case T_SHORT : __ sign_extend_short(rax); break;
299 case T_INT : /* nothing to do */ break;
300 case T_LONG : /* nothing to do */ break;
301 case T_VOID : /* nothing to do */ break;
302 #ifndef _LP64
303 case T_DOUBLE :
304 case T_FLOAT :
305 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
306 __ pop(t); // remove return address first
307 // Must return a result for interpreter or compiler. In SSE
308 // mode, results are returned in xmm0 and the FPU stack must
309 // be empty.
310 if (type == T_FLOAT && UseSSE >= 1) {
311 // Load ST0
312 __ fld_d(Address(rsp, 0));
313 // Store as float and empty fpu stack
314 __ fstp_s(Address(rsp, 0));
315 // and reload
316 __ movflt(xmm0, Address(rsp, 0));
317 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
318 __ movdbl(xmm0, Address(rsp, 0));
319 } else {
320 // restore ST0
321 __ fld_d(Address(rsp, 0));
322 }
323 // and pop the temp
324 __ addptr(rsp, 2 * wordSize);
325 __ push(t); // restore return address
326 }
327 break;
328 #else
329 case T_FLOAT : /* nothing to do */ break;
330 case T_DOUBLE : /* nothing to do */ break;
331 #endif // _LP64
332
333 case T_OBJECT :
334 // retrieve result from frame
335 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
336 // and verify it
337 __ verify_oop(rax);
338 break;
339 default : ShouldNotReachHere();
340 }
341 __ ret(0); // return from result handler
342 return entry;
343 }
344
345 address TemplateInterpreterGenerator::generate_safept_entry_for(
346 TosState state,
347 address runtime_entry) {
348 address entry = __ pc();
349 __ push(state);
350 __ call_VM(noreg, runtime_entry);
351 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
352 return entry;
353 }
354
355
356
357 // Helpers for commoning out cases in the various type of method entries.
358 //
359
360
361 // increment invocation count & check for overflow
362 //
363 // Note: checking for negative value instead of overflow
364 // so we have a 'sticky' overflow test
365 //
366 // rbx: method
367 // rcx: invocation counter
368 //
369 void TemplateInterpreterGenerator::generate_counter_incr(
370 Label* overflow,
371 Label* profile_method,
372 Label* profile_method_continue) {
373 Label done;
374 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
375 if (TieredCompilation) {
376 int increment = InvocationCounter::count_increment;
377 Label no_mdo;
378 if (ProfileInterpreter) {
379 // Are we profiling?
380 __ movptr(rax, Address(rbx, Method::method_data_offset()));
381 __ testptr(rax, rax);
382 __ jccb(Assembler::zero, no_mdo);
383 // Increment counter in the MDO
384 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
385 in_bytes(InvocationCounter::counter_offset()));
386 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
387 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
388 __ jmp(done);
389 }
390 __ bind(no_mdo);
391 // Increment counter in MethodCounters
392 const Address invocation_counter(rax,
393 MethodCounters::invocation_counter_offset() +
394 InvocationCounter::counter_offset());
395 __ get_method_counters(rbx, rax, done);
396 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
397 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
398 false, Assembler::zero, overflow);
399 __ bind(done);
400 } else { // not TieredCompilation
401 const Address backedge_counter(rax,
402 MethodCounters::backedge_counter_offset() +
403 InvocationCounter::counter_offset());
404 const Address invocation_counter(rax,
405 MethodCounters::invocation_counter_offset() +
406 InvocationCounter::counter_offset());
407
408 __ get_method_counters(rbx, rax, done);
409
410 if (ProfileInterpreter) {
411 __ incrementl(Address(rax,
412 MethodCounters::interpreter_invocation_counter_offset()));
413 }
414 // Update standard invocation counters
415 __ movl(rcx, invocation_counter);
416 __ incrementl(rcx, InvocationCounter::count_increment);
417 __ movl(invocation_counter, rcx); // save invocation count
418
419 __ movl(rax, backedge_counter); // load backedge counter
420 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
421
422 __ addl(rcx, rax); // add both counters
423
424 // profile_method is non-null only for interpreted method so
425 // profile_method != NULL == !native_call
426
427 if (ProfileInterpreter && profile_method != NULL) {
428 // Test to see if we should create a method data oop
429 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
430 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
431 __ jcc(Assembler::less, *profile_method_continue);
432
433 // if no method data exists, go to profile_method
434 __ test_method_data_pointer(rax, *profile_method);
435 }
436
437 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
438 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
439 __ jcc(Assembler::aboveEqual, *overflow);
440 __ bind(done);
441 }
442 }
443
444 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
445
446 // Asm interpreter on entry
447 // r14/rdi - locals
448 // r13/rsi - bcp
449 // rbx - method
450 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
451 // rbp - interpreter frame
452
453 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
454 // Everything as it was on entry
455 // rdx is not restored. Doesn't appear to really be set.
456
457 // InterpreterRuntime::frequency_counter_overflow takes two
458 // arguments, the first (thread) is passed by call_VM, the second
459 // indicates if the counter overflow occurs at a backwards branch
460 // (NULL bcp). We pass zero for it. The call returns the address
461 // of the verified entry point for the method or NULL if the
462 // compilation did not complete (either went background or bailed
463 // out).
464 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
465 __ movl(rarg, 0);
466 __ call_VM(noreg,
467 CAST_FROM_FN_PTR(address,
468 InterpreterRuntime::frequency_counter_overflow),
469 rarg);
470
471 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
472 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
473 // and jump to the interpreted entry.
474 __ jmp(do_continue, relocInfo::none);
475 }
476
477 // See if we've got enough room on the stack for locals plus overhead below
478 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
479 // without going through the signal handler, i.e., reserved and yellow zones
480 // will not be made usable. The shadow zone must suffice to handle the
481 // overflow.
482 // The expression stack grows down incrementally, so the normal guard
483 // page mechanism will work for that.
484 //
485 // NOTE: Since the additional locals are also always pushed (wasn't
486 // obvious in generate_fixed_frame) so the guard should work for them
487 // too.
488 //
489 // Args:
490 // rdx: number of additional locals this frame needs (what we must check)
491 // rbx: Method*
492 //
493 // Kills:
494 // rax
495 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
496
497 // monitor entry size: see picture of stack in frame_x86.hpp
498 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
499
500 // total overhead size: entry_size + (saved rbp through expr stack
501 // bottom). be sure to change this if you add/subtract anything
502 // to/from the overhead area
503 const int overhead_size =
504 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
505
506 const int page_size = os::vm_page_size();
507
508 Label after_frame_check;
509
510 // see if the frame is greater than one page in size. If so,
511 // then we need to verify there is enough stack space remaining
512 // for the additional locals.
513 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
514 __ jcc(Assembler::belowEqual, after_frame_check);
515
516 // compute rsp as if this were going to be the last frame on
517 // the stack before the red zone
518
519 Label after_frame_check_pop;
520 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
521 #ifndef _LP64
522 __ push(thread);
523 __ get_thread(thread);
524 #endif
525
526 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
527
528 // locals + overhead, in bytes
529 __ mov(rax, rdx);
530 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
531 __ addptr(rax, overhead_size);
532
533 #ifdef ASSERT
534 Label limit_okay;
535 // Verify that thread stack overflow limit is non-zero.
536 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
537 __ jcc(Assembler::notEqual, limit_okay);
538 __ stop("stack overflow limit is zero");
539 __ bind(limit_okay);
540 #endif
541
542 // Add locals/frame size to stack limit.
543 __ addptr(rax, stack_limit);
544
545 // Check against the current stack bottom.
546 __ cmpptr(rsp, rax);
547
548 __ jcc(Assembler::above, after_frame_check_pop);
549 NOT_LP64(__ pop(rsi)); // get saved bcp
550
551 // Restore sender's sp as SP. This is necessary if the sender's
552 // frame is an extended compiled frame (see gen_c2i_adapter())
553 // and safer anyway in case of JSR292 adaptations.
554
555 __ pop(rax); // return address must be moved if SP is changed
556 __ mov(rsp, rbcp);
557 __ push(rax);
558
559 // Note: the restored frame is not necessarily interpreted.
560 // Use the shared runtime version of the StackOverflowError.
561 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
562 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
563 // all done with frame size check
564 __ bind(after_frame_check_pop);
565 NOT_LP64(__ pop(rsi));
566
567 // all done with frame size check
568 __ bind(after_frame_check);
569 }
570
571 // Allocate monitor and lock method (asm interpreter)
572 //
573 // Args:
574 // rbx: Method*
575 // r14/rdi: locals
576 //
577 // Kills:
578 // rax
579 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
580 // rscratch1, rscratch2 (scratch regs)
581 void TemplateInterpreterGenerator::lock_method() {
582 // synchronize method
583 const Address access_flags(rbx, Method::access_flags_offset());
584 const Address monitor_block_top(
585 rbp,
586 frame::interpreter_frame_monitor_block_top_offset * wordSize);
587 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
588
589 #ifdef ASSERT
590 {
591 Label L;
592 __ movl(rax, access_flags);
593 __ testl(rax, JVM_ACC_SYNCHRONIZED);
594 __ jcc(Assembler::notZero, L);
595 __ stop("method doesn't need synchronization");
596 __ bind(L);
597 }
598 #endif // ASSERT
599
600 // get synchronization object
601 {
602 Label done;
603 __ movl(rax, access_flags);
604 __ testl(rax, JVM_ACC_STATIC);
605 // get receiver (assume this is frequent case)
606 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
607 __ jcc(Assembler::zero, done);
608 __ load_mirror(rax, rbx);
609
610 #ifdef ASSERT
611 {
612 Label L;
613 __ testptr(rax, rax);
614 __ jcc(Assembler::notZero, L);
615 __ stop("synchronization object is NULL");
616 __ bind(L);
617 }
618 #endif // ASSERT
619
620 __ bind(done);
621 }
622
623 // add space for monitor & lock
624 __ subptr(rsp, entry_size); // add space for a monitor entry
625 __ movptr(monitor_block_top, rsp); // set new monitor block top
626 // store object
627 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
628 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
629 __ movptr(lockreg, rsp); // object address
630 __ lock_object(lockreg);
631 }
632
633 // Generate a fixed interpreter frame. This is identical setup for
634 // interpreted methods and for native methods hence the shared code.
635 //
636 // Args:
637 // rax: return address
638 // rbx: Method*
639 // r14/rdi: pointer to locals
640 // r13/rsi: sender sp
641 // rdx: cp cache
642 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
643 // initialize fixed part of activation frame
644 __ push(rax); // save return address
645 __ enter(); // save old & set new rbp
646 __ push(rbcp); // set sender sp
647 __ push((int)NULL_WORD); // leave last_sp as null
648 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
649 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
650 __ push(rbx); // save Method*
651 // Get mirror and store it in the frame as GC root for this Method*
652 __ load_mirror(rdx, rbx);
653 __ push(rdx);
654 if (ProfileInterpreter) {
655 Label method_data_continue;
656 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
657 __ testptr(rdx, rdx);
658 __ jcc(Assembler::zero, method_data_continue);
659 __ addptr(rdx, in_bytes(MethodData::data_offset()));
660 __ bind(method_data_continue);
661 __ push(rdx); // set the mdp (method data pointer)
662 } else {
663 __ push(0);
664 }
665
666 __ movptr(rdx, Address(rbx, Method::const_offset()));
667 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
668 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
669 __ push(rdx); // set constant pool cache
670 __ push(rlocals); // set locals pointer
671 if (native_call) {
672 __ push(0); // no bcp
673 } else {
674 __ push(rbcp); // set bcp
675 }
676 __ push(0); // reserve word for pointer to expression stack bottom
677 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
678 }
679
680 // End of helpers
681
682 // Method entry for java.lang.ref.Reference.get.
683 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
684 #if INCLUDE_ALL_GCS
685 // Code: _aload_0, _getfield, _areturn
686 // parameter size = 1
687 //
688 // The code that gets generated by this routine is split into 2 parts:
689 // 1. The "intrinsified" code for G1 (or any SATB based GC),
690 // 2. The slow path - which is an expansion of the regular method entry.
691 //
692 // Notes:-
693 // * In the G1 code we do not check whether we need to block for
694 // a safepoint. If G1 is enabled then we must execute the specialized
695 // code for Reference.get (except when the Reference object is null)
696 // so that we can log the value in the referent field with an SATB
697 // update buffer.
698 // If the code for the getfield template is modified so that the
699 // G1 pre-barrier code is executed when the current method is
700 // Reference.get() then going through the normal method entry
701 // will be fine.
702 // * The G1 code can, however, check the receiver object (the instance
703 // of java.lang.Reference) and jump to the slow path if null. If the
704 // Reference object is null then we obviously cannot fetch the referent
705 // and so we don't need to call the G1 pre-barrier. Thus we can use the
706 // regular method entry code to generate the NPE.
707 //
708 // rbx: Method*
709
710 // r13: senderSP must preserve for slow path, set SP to it on fast path
711
712 address entry = __ pc();
713
714 const int referent_offset = java_lang_ref_Reference::referent_offset;
715 guarantee(referent_offset > 0, "referent offset not initialized");
716
717 if (UseG1GC) {
718 Label slow_path;
719 // rbx: method
720
721 // Check if local 0 != NULL
722 // If the receiver is null then it is OK to jump to the slow path.
723 __ movptr(rax, Address(rsp, wordSize));
724
725 __ testptr(rax, rax);
726 __ jcc(Assembler::zero, slow_path);
727
728 // rax: local 0
729 // rbx: method (but can be used as scratch now)
730 // rdx: scratch
731 // rdi: scratch
732
733 // Preserve the sender sp in case the pre-barrier
734 // calls the runtime
735 NOT_LP64(__ push(rsi));
736
737 // Generate the G1 pre-barrier code to log the value of
738 // the referent field in an SATB buffer.
739
740 // Load the value of the referent field.
741 const Address field_address(rax, referent_offset);
742 __ load_heap_oop(rax, field_address);
743
744 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
745 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
746 NOT_LP64(__ get_thread(thread));
747
748 // Generate the G1 pre-barrier code to log the value of
749 // the referent field in an SATB buffer.
750 __ g1_write_barrier_pre(noreg /* obj */,
751 rax /* pre_val */,
752 thread /* thread */,
753 rbx /* tmp */,
754 true /* tosca_live */,
755 true /* expand_call */);
756
757 // _areturn
758 NOT_LP64(__ pop(rsi)); // get sender sp
759 __ pop(rdi); // get return address
760 __ mov(rsp, sender_sp); // set sp to sender sp
761 __ jmp(rdi);
762 __ ret(0);
763
764 // generate a vanilla interpreter entry as the slow path
765 __ bind(slow_path);
766 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
767 return entry;
768 }
769 #endif // INCLUDE_ALL_GCS
770
771 // If G1 is not enabled then attempt to go through the accessor entry point
772 // Reference.get is an accessor
773 return NULL;
774 }
775
776 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
777 // Quick & dirty stack overflow checking: bang the stack & handle trap.
778 // Note that we do the banging after the frame is setup, since the exception
779 // handling code expects to find a valid interpreter frame on the stack.
780 // Doing the banging earlier fails if the caller frame is not an interpreter
781 // frame.
782 // (Also, the exception throwing code expects to unlock any synchronized
783 // method receiever, so do the banging after locking the receiver.)
784
785 // Bang each page in the shadow zone. We can't assume it's been done for
786 // an interpreter frame with greater than a page of locals, so each page
787 // needs to be checked. Only true for non-native.
788 if (UseStackBanging) {
789 const int page_size = os::vm_page_size();
790 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size;
791 const int start_page = native_call ? n_shadow_pages : 1;
792 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
793 __ bang_stack_with_offset(pages*page_size);
794 }
795 }
796 }
797
798 // Interpreter stub for calling a native method. (asm interpreter)
799 // This sets up a somewhat different looking stack for calling the
800 // native method than the typical interpreter frame setup.
801 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
802 // determine code generation flags
803 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
804
805 // rbx: Method*
806 // rbcp: sender sp
807
808 address entry_point = __ pc();
809
810 const Address constMethod (rbx, Method::const_offset());
811 const Address access_flags (rbx, Method::access_flags_offset());
812 const Address size_of_parameters(rcx, ConstMethod::
813 size_of_parameters_offset());
814
815
816 // get parameter size (always needed)
817 __ movptr(rcx, constMethod);
818 __ load_unsigned_short(rcx, size_of_parameters);
819
820 // native calls don't need the stack size check since they have no
821 // expression stack and the arguments are already on the stack and
822 // we only add a handful of words to the stack
823
824 // rbx: Method*
825 // rcx: size of parameters
826 // rbcp: sender sp
827 __ pop(rax); // get return address
828
829 // for natives the size of locals is zero
830
831 // compute beginning of parameters
832 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
833
834 // add 2 zero-initialized slots for native calls
835 // initialize result_handler slot
836 __ push((int) NULL_WORD);
837 // slot for oop temp
838 // (static native method holder mirror/jni oop result)
839 __ push((int) NULL_WORD);
840
841 // initialize fixed part of activation frame
842 generate_fixed_frame(true);
843
844 // make sure method is native & not abstract
845 #ifdef ASSERT
846 __ movl(rax, access_flags);
847 {
848 Label L;
849 __ testl(rax, JVM_ACC_NATIVE);
850 __ jcc(Assembler::notZero, L);
851 __ stop("tried to execute non-native method as native");
852 __ bind(L);
853 }
854 {
855 Label L;
856 __ testl(rax, JVM_ACC_ABSTRACT);
857 __ jcc(Assembler::zero, L);
858 __ stop("tried to execute abstract method in interpreter");
859 __ bind(L);
860 }
861 #endif
862
863 // Since at this point in the method invocation the exception handler
864 // would try to exit the monitor of synchronized methods which hasn't
865 // been entered yet, we set the thread local variable
866 // _do_not_unlock_if_synchronized to true. The remove_activation will
867 // check this flag.
868
869 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
870 NOT_LP64(__ get_thread(thread1));
871 const Address do_not_unlock_if_synchronized(thread1,
872 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
873 __ movbool(do_not_unlock_if_synchronized, true);
874
875 // increment invocation count & check for overflow
876 Label invocation_counter_overflow;
877 if (inc_counter) {
878 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
879 }
880
881 Label continue_after_compile;
882 __ bind(continue_after_compile);
883
884 bang_stack_shadow_pages(true);
885
886 // reset the _do_not_unlock_if_synchronized flag
887 NOT_LP64(__ get_thread(thread1));
888 __ movbool(do_not_unlock_if_synchronized, false);
889
890 // check for synchronized methods
891 // Must happen AFTER invocation_counter check and stack overflow check,
892 // so method is not locked if overflows.
893 if (synchronized) {
894 lock_method();
895 } else {
896 // no synchronization necessary
897 #ifdef ASSERT
898 {
899 Label L;
900 __ movl(rax, access_flags);
901 __ testl(rax, JVM_ACC_SYNCHRONIZED);
902 __ jcc(Assembler::zero, L);
903 __ stop("method needs synchronization");
904 __ bind(L);
905 }
906 #endif
907 }
908
909 // start execution
910 #ifdef ASSERT
911 {
912 Label L;
913 const Address monitor_block_top(rbp,
914 frame::interpreter_frame_monitor_block_top_offset * wordSize);
915 __ movptr(rax, monitor_block_top);
916 __ cmpptr(rax, rsp);
917 __ jcc(Assembler::equal, L);
918 __ stop("broken stack frame setup in interpreter");
919 __ bind(L);
920 }
921 #endif
922
923 // jvmti support
924 __ notify_method_entry();
925
926 // work registers
927 const Register method = rbx;
928 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
929 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
930
931 // allocate space for parameters
932 __ get_method(method);
933 __ movptr(t, Address(method, Method::const_offset()));
934 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
935
936 #ifndef _LP64
937 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
938 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
939 __ subptr(rsp, t);
940 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
941 #else
942 __ shll(t, Interpreter::logStackElementSize);
943
944 __ subptr(rsp, t);
945 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
946 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
947 #endif // _LP64
948
949 // get signature handler
950 {
951 Label L;
952 __ movptr(t, Address(method, Method::signature_handler_offset()));
953 __ testptr(t, t);
954 __ jcc(Assembler::notZero, L);
955 __ call_VM(noreg,
956 CAST_FROM_FN_PTR(address,
957 InterpreterRuntime::prepare_native_call),
958 method);
959 __ get_method(method);
960 __ movptr(t, Address(method, Method::signature_handler_offset()));
961 __ bind(L);
962 }
963
964 // call signature handler
965 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
966 "adjust this code");
967 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
968 "adjust this code");
969 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
970 "adjust this code");
971
972 // The generated handlers do not touch RBX (the method oop).
973 // However, large signatures cannot be cached and are generated
974 // each time here. The slow-path generator can do a GC on return,
975 // so we must reload it after the call.
976 __ call(t);
977 __ get_method(method); // slow path can do a GC, reload RBX
978
979
980 // result handler is in rax
981 // set result handler
982 __ movptr(Address(rbp,
983 (frame::interpreter_frame_result_handler_offset) * wordSize),
984 rax);
985
986 // pass mirror handle if static call
987 {
988 Label L;
989 __ movl(t, Address(method, Method::access_flags_offset()));
990 __ testl(t, JVM_ACC_STATIC);
991 __ jcc(Assembler::zero, L);
992 // get mirror
993 __ load_mirror(t, method);
994 // copy mirror into activation frame
995 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
996 t);
997 // pass handle to mirror
998 #ifndef _LP64
999 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1000 __ movptr(Address(rsp, wordSize), t);
1001 #else
1002 __ lea(c_rarg1,
1003 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1004 #endif // _LP64
1005 __ bind(L);
1006 }
1007
1008 // get native function entry point
1009 {
1010 Label L;
1011 __ movptr(rax, Address(method, Method::native_function_offset()));
1012 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1013 __ cmpptr(rax, unsatisfied.addr());
1014 __ jcc(Assembler::notEqual, L);
1015 __ call_VM(noreg,
1016 CAST_FROM_FN_PTR(address,
1017 InterpreterRuntime::prepare_native_call),
1018 method);
1019 __ get_method(method);
1020 __ movptr(rax, Address(method, Method::native_function_offset()));
1021 __ bind(L);
1022 }
1023
1024 // pass JNIEnv
1025 #ifndef _LP64
1026 __ get_thread(thread);
1027 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1028 __ movptr(Address(rsp, 0), t);
1029
1030 // set_last_Java_frame_before_call
1031 // It is enough that the pc()
1032 // points into the right code segment. It does not have to be the correct return pc.
1033 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1034 #else
1035 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1036
1037 // It is enough that the pc() points into the right code
1038 // segment. It does not have to be the correct return pc.
1039 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1040 #endif // _LP64
1041
1042 // change thread state
1043 #ifdef ASSERT
1044 {
1045 Label L;
1046 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1047 __ cmpl(t, _thread_in_Java);
1048 __ jcc(Assembler::equal, L);
1049 __ stop("Wrong thread state in native stub");
1050 __ bind(L);
1051 }
1052 #endif
1053
1054 // Change state to native
1055
1056 __ movl(Address(thread, JavaThread::thread_state_offset()),
1057 _thread_in_native);
1058
1059 // Call the native method.
1060 __ call(rax);
1061 // 32: result potentially in rdx:rax or ST0
1062 // 64: result potentially in rax or xmm0
1063
1064 // Verify or restore cpu control state after JNI call
1065 __ restore_cpu_control_state_after_jni();
1066
1067 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1068 // in order to extract the result of a method call. If the order of these
1069 // pushes change or anything else is added to the stack then the code in
1070 // interpreter_frame_result must also change.
1071
1072 #ifndef _LP64
1073 // save potential result in ST(0) & rdx:rax
1074 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1075 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1076 // It is safe to do this push because state is _thread_in_native and return address will be found
1077 // via _last_native_pc and not via _last_jave_sp
1078
1079 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1080 // If the order changes or anything else is added to the stack the code in
1081 // interpreter_frame_result will have to be changed.
1082
1083 { Label L;
1084 Label push_double;
1085 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1086 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1087 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1088 float_handler.addr());
1089 __ jcc(Assembler::equal, push_double);
1090 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1091 double_handler.addr());
1092 __ jcc(Assembler::notEqual, L);
1093 __ bind(push_double);
1094 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1095 __ bind(L);
1096 }
1097 #else
1098 __ push(dtos);
1099 #endif // _LP64
1100
1101 __ push(ltos);
1102
1103 // change thread state
1104 NOT_LP64(__ get_thread(thread));
1105 __ movl(Address(thread, JavaThread::thread_state_offset()),
1106 _thread_in_native_trans);
1107
1108 if (os::is_MP()) {
1109 if (UseMembar) {
1110 // Force this write out before the read below
1111 __ membar(Assembler::Membar_mask_bits(
1112 Assembler::LoadLoad | Assembler::LoadStore |
1113 Assembler::StoreLoad | Assembler::StoreStore));
1114 } else {
1115 // Write serialization page so VM thread can do a pseudo remote membar.
1116 // We use the current thread pointer to calculate a thread specific
1117 // offset to write to within the page. This minimizes bus traffic
1118 // due to cache line collision.
1119 __ serialize_memory(thread, rcx);
1120 }
1121 }
1122
1123 #ifndef _LP64
1124 if (AlwaysRestoreFPU) {
1125 // Make sure the control word is correct.
1126 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1127 }
1128 #endif // _LP64
1129
1130 // check for safepoint operation in progress and/or pending suspend requests
1131 {
1132 Label Continue;
1133 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1134 SafepointSynchronize::_not_synchronized);
1135
1136 Label L;
1137 __ jcc(Assembler::notEqual, L);
1138 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1139 __ jcc(Assembler::equal, Continue);
1140 __ bind(L);
1141
1142 // Don't use call_VM as it will see a possible pending exception
1143 // and forward it and never return here preventing us from
1144 // clearing _last_native_pc down below. Also can't use
1145 // call_VM_leaf either as it will check to see if r13 & r14 are
1146 // preserved and correspond to the bcp/locals pointers. So we do a
1147 // runtime call by hand.
1148 //
1149 #ifndef _LP64
1150 __ push(thread);
1151 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1152 JavaThread::check_special_condition_for_native_trans)));
1153 __ increment(rsp, wordSize);
1154 __ get_thread(thread);
1155 #else
1156 __ mov(c_rarg0, r15_thread);
1157 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1158 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1159 __ andptr(rsp, -16); // align stack as required by ABI
1160 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1161 __ mov(rsp, r12); // restore sp
1162 __ reinit_heapbase();
1163 #endif // _LP64
1164 __ bind(Continue);
1165 }
1166
1167 // change thread state
1168 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1169
1170 // reset_last_Java_frame
1171 __ reset_last_Java_frame(thread, true);
1172
1173 if (CheckJNICalls) {
1174 // clear_pending_jni_exception_check
1175 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1176 }
1177
1178 // reset handle block
1179 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1180 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1181
1182 // If result is an oop unbox and store it in frame where gc will see it
1183 // and result handler will pick it up
1184
1185 {
1186 Label no_oop, store_result;
1187 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1188 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1189 __ jcc(Assembler::notEqual, no_oop);
1190 // retrieve result
1191 __ pop(ltos);
1192 __ testptr(rax, rax);
1193 __ jcc(Assembler::zero, store_result);
1194 __ movptr(rax, Address(rax, 0));
1195 __ bind(store_result);
1196 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1197 // keep stack depth as expected by pushing oop which will eventually be discarded
1198 __ push(ltos);
1199 __ bind(no_oop);
1200 }
1201
1202
1203 {
1204 Label no_reguard;
1205 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1206 JavaThread::stack_guard_yellow_reserved_disabled);
1207 __ jcc(Assembler::notEqual, no_reguard);
1208
1209 __ pusha(); // XXX only save smashed registers
1210 #ifndef _LP64
1211 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1212 __ popa();
1213 #else
1214 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1215 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1216 __ andptr(rsp, -16); // align stack as required by ABI
1217 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1218 __ mov(rsp, r12); // restore sp
1219 __ popa(); // XXX only restore smashed registers
1220 __ reinit_heapbase();
1221 #endif // _LP64
1222
1223 __ bind(no_reguard);
1224 }
1225
1226
1227 // The method register is junk from after the thread_in_native transition
1228 // until here. Also can't call_VM until the bcp has been
1229 // restored. Need bcp for throwing exception below so get it now.
1230 __ get_method(method);
1231
1232 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1233 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1234 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1235
1236 // handle exceptions (exception handling will handle unlocking!)
1237 {
1238 Label L;
1239 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1240 __ jcc(Assembler::zero, L);
1241 // Note: At some point we may want to unify this with the code
1242 // used in call_VM_base(); i.e., we should use the
1243 // StubRoutines::forward_exception code. For now this doesn't work
1244 // here because the rsp is not correctly set at this point.
1245 __ MacroAssembler::call_VM(noreg,
1246 CAST_FROM_FN_PTR(address,
1247 InterpreterRuntime::throw_pending_exception));
1248 __ should_not_reach_here();
1249 __ bind(L);
1250 }
1251
1252 // do unlocking if necessary
1253 {
1254 Label L;
1255 __ movl(t, Address(method, Method::access_flags_offset()));
1256 __ testl(t, JVM_ACC_SYNCHRONIZED);
1257 __ jcc(Assembler::zero, L);
1258 // the code below should be shared with interpreter macro
1259 // assembler implementation
1260 {
1261 Label unlock;
1262 // BasicObjectLock will be first in list, since this is a
1263 // synchronized method. However, need to check that the object
1264 // has not been unlocked by an explicit monitorexit bytecode.
1265 const Address monitor(rbp,
1266 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1267 wordSize - (int)sizeof(BasicObjectLock)));
1268
1269 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1270
1271 // monitor expect in c_rarg1 for slow unlock path
1272 __ lea(regmon, monitor); // address of first monitor
1273
1274 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1275 __ testptr(t, t);
1276 __ jcc(Assembler::notZero, unlock);
1277
1278 // Entry already unlocked, need to throw exception
1279 __ MacroAssembler::call_VM(noreg,
1280 CAST_FROM_FN_PTR(address,
1281 InterpreterRuntime::throw_illegal_monitor_state_exception));
1282 __ should_not_reach_here();
1283
1284 __ bind(unlock);
1285 __ unlock_object(regmon);
1286 }
1287 __ bind(L);
1288 }
1289
1290 // jvmti support
1291 // Note: This must happen _after_ handling/throwing any exceptions since
1292 // the exception handler code notifies the runtime of method exits
1293 // too. If this happens before, method entry/exit notifications are
1294 // not properly paired (was bug - gri 11/22/99).
1295 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1296
1297 // restore potential result in edx:eax, call result handler to
1298 // restore potential result in ST0 & handle result
1299
1300 __ pop(ltos);
1301 LP64_ONLY( __ pop(dtos));
1302
1303 __ movptr(t, Address(rbp,
1304 (frame::interpreter_frame_result_handler_offset) * wordSize));
1305 __ call(t);
1306
1307 // remove activation
1308 __ movptr(t, Address(rbp,
1309 frame::interpreter_frame_sender_sp_offset *
1310 wordSize)); // get sender sp
1311 __ leave(); // remove frame anchor
1312 __ pop(rdi); // get return address
1313 __ mov(rsp, t); // set sp to sender sp
1314 __ jmp(rdi);
1315
1316 if (inc_counter) {
1317 // Handle overflow of counter and compile method
1318 __ bind(invocation_counter_overflow);
1319 generate_counter_overflow(continue_after_compile);
1320 }
1321
1322 return entry_point;
1323 }
1324
1325 // Abstract method entry
1326 // Attempt to execute abstract method. Throw exception
1327 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1328
1329 address entry_point = __ pc();
1330
1331 // abstract method entry
1332
1333 // pop return address, reset last_sp to NULL
1334 __ empty_expression_stack();
1335 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1336 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1337
1338 // throw exception
1339 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
1340 // the call_VM checks for exception, so we should never return here.
1341 __ should_not_reach_here();
1342
1343 return entry_point;
1344 }
1345
1346 //
1347 // Generic interpreted method entry to (asm) interpreter
1348 //
1349 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1350 // determine code generation flags
1351 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1352
1353 // ebx: Method*
1354 // rbcp: sender sp
1355 address entry_point = __ pc();
1356
1357 const Address constMethod(rbx, Method::const_offset());
1358 const Address access_flags(rbx, Method::access_flags_offset());
1359 const Address size_of_parameters(rdx,
1360 ConstMethod::size_of_parameters_offset());
1361 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1362
1363
1364 // get parameter size (always needed)
1365 __ movptr(rdx, constMethod);
1366 __ load_unsigned_short(rcx, size_of_parameters);
1367
1368 // rbx: Method*
1369 // rcx: size of parameters
1370 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1371
1372 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1373 __ subl(rdx, rcx); // rdx = no. of additional locals
1374
1375 // YYY
1376 // __ incrementl(rdx);
1377 // __ andl(rdx, -2);
1378
1379 // see if we've got enough room on the stack for locals plus overhead.
1380 generate_stack_overflow_check();
1381
1382 // get return address
1383 __ pop(rax);
1384
1385 // compute beginning of parameters
1386 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1387
1388 // rdx - # of additional locals
1389 // allocate space for locals
1390 // explicitly initialize locals
1391 {
1392 Label exit, loop;
1393 __ testl(rdx, rdx);
1394 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1395 __ bind(loop);
1396 __ push((int) NULL_WORD); // initialize local variables
1397 __ decrementl(rdx); // until everything initialized
1398 __ jcc(Assembler::greater, loop);
1399 __ bind(exit);
1400 }
1401
1402 // initialize fixed part of activation frame
1403 generate_fixed_frame(false);
1404
1405 // make sure method is not native & not abstract
1406 #ifdef ASSERT
1407 __ movl(rax, access_flags);
1408 {
1409 Label L;
1410 __ testl(rax, JVM_ACC_NATIVE);
1411 __ jcc(Assembler::zero, L);
1412 __ stop("tried to execute native method as non-native");
1413 __ bind(L);
1414 }
1415 {
1416 Label L;
1417 __ testl(rax, JVM_ACC_ABSTRACT);
1418 __ jcc(Assembler::zero, L);
1419 __ stop("tried to execute abstract method in interpreter");
1420 __ bind(L);
1421 }
1422 #endif
1423
1424 // Since at this point in the method invocation the exception
1425 // handler would try to exit the monitor of synchronized methods
1426 // which hasn't been entered yet, we set the thread local variable
1427 // _do_not_unlock_if_synchronized to true. The remove_activation
1428 // will check this flag.
1429
1430 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1431 NOT_LP64(__ get_thread(thread));
1432 const Address do_not_unlock_if_synchronized(thread,
1433 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1434 __ movbool(do_not_unlock_if_synchronized, true);
1435
1436 __ profile_parameters_type(rax, rcx, rdx);
1437 // increment invocation count & check for overflow
1438 Label invocation_counter_overflow;
1439 Label profile_method;
1440 Label profile_method_continue;
1441 if (inc_counter) {
1442 generate_counter_incr(&invocation_counter_overflow,
1443 &profile_method,
1444 &profile_method_continue);
1445 if (ProfileInterpreter) {
1446 __ bind(profile_method_continue);
1447 }
1448 }
1449
1450 Label continue_after_compile;
1451 __ bind(continue_after_compile);
1452
1453 // check for synchronized interpreted methods
1454 bang_stack_shadow_pages(false);
1455
1456 // reset the _do_not_unlock_if_synchronized flag
1457 NOT_LP64(__ get_thread(thread));
1458 __ movbool(do_not_unlock_if_synchronized, false);
1459
1460 // check for synchronized methods
1461 // Must happen AFTER invocation_counter check and stack overflow check,
1462 // so method is not locked if overflows.
1463 if (synchronized) {
1464 // Allocate monitor and lock method
1465 lock_method();
1466 } else {
1467 // no synchronization necessary
1468 #ifdef ASSERT
1469 {
1470 Label L;
1471 __ movl(rax, access_flags);
1472 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1473 __ jcc(Assembler::zero, L);
1474 __ stop("method needs synchronization");
1475 __ bind(L);
1476 }
1477 #endif
1478 }
1479
1480 // start execution
1481 #ifdef ASSERT
1482 {
1483 Label L;
1484 const Address monitor_block_top (rbp,
1485 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1486 __ movptr(rax, monitor_block_top);
1487 __ cmpptr(rax, rsp);
1488 __ jcc(Assembler::equal, L);
1489 __ stop("broken stack frame setup in interpreter");
1490 __ bind(L);
1491 }
1492 #endif
1493
1494 // jvmti support
1495 __ notify_method_entry();
1496
1497 __ dispatch_next(vtos);
1498
1499 // invocation counter overflow
1500 if (inc_counter) {
1501 if (ProfileInterpreter) {
1502 // We have decided to profile this method in the interpreter
1503 __ bind(profile_method);
1504 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1505 __ set_method_data_pointer_for_bcp();
1506 __ get_method(rbx);
1507 __ jmp(profile_method_continue);
1508 }
1509 // Handle overflow of counter and compile method
1510 __ bind(invocation_counter_overflow);
1511 generate_counter_overflow(continue_after_compile);
1512 }
1513
1514 return entry_point;
1515 }
1516
1517 //-----------------------------------------------------------------------------
1518 // Exceptions
1519
1520 void TemplateInterpreterGenerator::generate_throw_exception() {
1521 // Entry point in previous activation (i.e., if the caller was
1522 // interpreted)
1523 Interpreter::_rethrow_exception_entry = __ pc();
1524 // Restore sp to interpreter_frame_last_sp even though we are going
1525 // to empty the expression stack for the exception processing.
1526 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1527 // rax: exception
1528 // rdx: return address/pc that threw exception
1529 __ restore_bcp(); // r13/rsi points to call/send
1530 __ restore_locals();
1531 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1532 // Entry point for exceptions thrown within interpreter code
1533 Interpreter::_throw_exception_entry = __ pc();
1534 // expression stack is undefined here
1535 // rax: exception
1536 // r13/rsi: exception bcp
1537 __ verify_oop(rax);
1538 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1539 LP64_ONLY(__ mov(c_rarg1, rax));
1540
1541 // expression stack must be empty before entering the VM in case of
1542 // an exception
1543 __ empty_expression_stack();
1544 // find exception handler address and preserve exception oop
1545 __ call_VM(rdx,
1546 CAST_FROM_FN_PTR(address,
1547 InterpreterRuntime::exception_handler_for_exception),
1548 rarg);
1549 // rax: exception handler entry point
1550 // rdx: preserved exception oop
1551 // r13/rsi: bcp for exception handler
1552 __ push_ptr(rdx); // push exception which is now the only value on the stack
1553 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1554
1555 // If the exception is not handled in the current frame the frame is
1556 // removed and the exception is rethrown (i.e. exception
1557 // continuation is _rethrow_exception).
1558 //
1559 // Note: At this point the bci is still the bxi for the instruction
1560 // which caused the exception and the expression stack is
1561 // empty. Thus, for any VM calls at this point, GC will find a legal
1562 // oop map (with empty expression stack).
1563
1564 // In current activation
1565 // tos: exception
1566 // esi: exception bcp
1567
1568 //
1569 // JVMTI PopFrame support
1570 //
1571
1572 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1573 __ empty_expression_stack();
1574 // Set the popframe_processing bit in pending_popframe_condition
1575 // indicating that we are currently handling popframe, so that
1576 // call_VMs that may happen later do not trigger new popframe
1577 // handling cycles.
1578 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1579 NOT_LP64(__ get_thread(thread));
1580 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1581 __ orl(rdx, JavaThread::popframe_processing_bit);
1582 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1583
1584 {
1585 // Check to see whether we are returning to a deoptimized frame.
1586 // (The PopFrame call ensures that the caller of the popped frame is
1587 // either interpreted or compiled and deoptimizes it if compiled.)
1588 // In this case, we can't call dispatch_next() after the frame is
1589 // popped, but instead must save the incoming arguments and restore
1590 // them after deoptimization has occurred.
1591 //
1592 // Note that we don't compare the return PC against the
1593 // deoptimization blob's unpack entry because of the presence of
1594 // adapter frames in C2.
1595 Label caller_not_deoptimized;
1596 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1597 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1598 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1599 InterpreterRuntime::interpreter_contains), rarg);
1600 __ testl(rax, rax);
1601 __ jcc(Assembler::notZero, caller_not_deoptimized);
1602
1603 // Compute size of arguments for saving when returning to
1604 // deoptimized caller
1605 __ get_method(rax);
1606 __ movptr(rax, Address(rax, Method::const_offset()));
1607 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1608 size_of_parameters_offset())));
1609 __ shll(rax, Interpreter::logStackElementSize);
1610 __ restore_locals();
1611 __ subptr(rlocals, rax);
1612 __ addptr(rlocals, wordSize);
1613 // Save these arguments
1614 NOT_LP64(__ get_thread(thread));
1615 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1616 Deoptimization::
1617 popframe_preserve_args),
1618 thread, rax, rlocals);
1619
1620 __ remove_activation(vtos, rdx,
1621 /* throw_monitor_exception */ false,
1622 /* install_monitor_exception */ false,
1623 /* notify_jvmdi */ false);
1624
1625 // Inform deoptimization that it is responsible for restoring
1626 // these arguments
1627 NOT_LP64(__ get_thread(thread));
1628 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1629 JavaThread::popframe_force_deopt_reexecution_bit);
1630
1631 // Continue in deoptimization handler
1632 __ jmp(rdx);
1633
1634 __ bind(caller_not_deoptimized);
1635 }
1636
1637 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1638 /* throw_monitor_exception */ false,
1639 /* install_monitor_exception */ false,
1640 /* notify_jvmdi */ false);
1641
1642 // Finish with popframe handling
1643 // A previous I2C followed by a deoptimization might have moved the
1644 // outgoing arguments further up the stack. PopFrame expects the
1645 // mutations to those outgoing arguments to be preserved and other
1646 // constraints basically require this frame to look exactly as
1647 // though it had previously invoked an interpreted activation with
1648 // no space between the top of the expression stack (current
1649 // last_sp) and the top of stack. Rather than force deopt to
1650 // maintain this kind of invariant all the time we call a small
1651 // fixup routine to move the mutated arguments onto the top of our
1652 // expression stack if necessary.
1653 #ifndef _LP64
1654 __ mov(rax, rsp);
1655 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1656 __ get_thread(thread);
1657 // PC must point into interpreter here
1658 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1659 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1660 __ get_thread(thread);
1661 #else
1662 __ mov(c_rarg1, rsp);
1663 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1664 // PC must point into interpreter here
1665 __ set_last_Java_frame(noreg, rbp, __ pc());
1666 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1667 #endif
1668 __ reset_last_Java_frame(thread, true);
1669
1670 // Restore the last_sp and null it out
1671 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1672 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1673
1674 __ restore_bcp();
1675 __ restore_locals();
1676 // The method data pointer was incremented already during
1677 // call profiling. We have to restore the mdp for the current bcp.
1678 if (ProfileInterpreter) {
1679 __ set_method_data_pointer_for_bcp();
1680 }
1681
1682 // Clear the popframe condition flag
1683 NOT_LP64(__ get_thread(thread));
1684 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1685 JavaThread::popframe_inactive);
1686
1687 #if INCLUDE_JVMTI
1688 {
1689 Label L_done;
1690 const Register local0 = rlocals;
1691
1692 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1693 __ jcc(Assembler::notEqual, L_done);
1694
1695 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1696 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1697
1698 __ get_method(rdx);
1699 __ movptr(rax, Address(local0, 0));
1700 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1701
1702 __ testptr(rax, rax);
1703 __ jcc(Assembler::zero, L_done);
1704
1705 __ movptr(Address(rbx, 0), rax);
1706 __ bind(L_done);
1707 }
1708 #endif // INCLUDE_JVMTI
1709
1710 __ dispatch_next(vtos);
1711 // end of PopFrame support
1712
1713 Interpreter::_remove_activation_entry = __ pc();
1714
1715 // preserve exception over this code sequence
1716 __ pop_ptr(rax);
1717 NOT_LP64(__ get_thread(thread));
1718 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1719 // remove the activation (without doing throws on illegalMonitorExceptions)
1720 __ remove_activation(vtos, rdx, false, true, false);
1721 // restore exception
1722 NOT_LP64(__ get_thread(thread));
1723 __ get_vm_result(rax, thread);
1724
1725 // In between activations - previous activation type unknown yet
1726 // compute continuation point - the continuation point expects the
1727 // following registers set up:
1728 //
1729 // rax: exception
1730 // rdx: return address/pc that threw exception
1731 // rsp: expression stack of caller
1732 // rbp: ebp of caller
1733 __ push(rax); // save exception
1734 __ push(rdx); // save return address
1735 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1736 SharedRuntime::exception_handler_for_return_address),
1737 thread, rdx);
1738 __ mov(rbx, rax); // save exception handler
1739 __ pop(rdx); // restore return address
1740 __ pop(rax); // restore exception
1741 // Note that an "issuing PC" is actually the next PC after the call
1742 __ jmp(rbx); // jump to exception
1743 // handler of caller
1744 }
1745
1746
1747 //
1748 // JVMTI ForceEarlyReturn support
1749 //
1750 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1751 address entry = __ pc();
1752
1753 __ restore_bcp();
1754 __ restore_locals();
1755 __ empty_expression_stack();
1756 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1757
1758 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1759 NOT_LP64(__ get_thread(thread));
1760 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1761 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1762
1763 // Clear the earlyret state
1764 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1765
1766 __ remove_activation(state, rsi,
1767 false, /* throw_monitor_exception */
1768 false, /* install_monitor_exception */
1769 true); /* notify_jvmdi */
1770 __ jmp(rsi);
1771
1772 return entry;
1773 } // end of ForceEarlyReturn support
1774
1775
1776 //-----------------------------------------------------------------------------
1777 // Helper for vtos entry point generation
1778
1779 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1780 address& bep,
1781 address& cep,
1782 address& sep,
1783 address& aep,
1784 address& iep,
1785 address& lep,
1786 address& fep,
1787 address& dep,
1788 address& vep) {
1789 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1790 Label L;
1791 aep = __ pc(); __ push_ptr(); __ jmp(L);
1792 #ifndef _LP64
1793 fep = __ pc(); __ push(ftos); __ jmp(L);
1794 dep = __ pc(); __ push(dtos); __ jmp(L);
1795 #else
1796 fep = __ pc(); __ push_f(xmm0); __ jmp(L);
1797 dep = __ pc(); __ push_d(xmm0); __ jmp(L);
1798 #endif // _LP64
1799 lep = __ pc(); __ push_l(); __ jmp(L);
1800 bep = cep = sep =
1801 iep = __ pc(); __ push_i();
1802 vep = __ pc();
1803 __ bind(L);
1804 generate_and_dispatch(t);
1805 }
1806
1807 //-----------------------------------------------------------------------------
1808
1809 // Non-product code
1810 #ifndef PRODUCT
1811
1812 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1813 address entry = __ pc();
1814
1815 #ifndef _LP64
1816 // prepare expression stack
1817 __ pop(rcx); // pop return address so expression stack is 'pure'
1818 __ push(state); // save tosca
1819
1820 // pass tosca registers as arguments & call tracer
1821 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1822 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1823 __ pop(state); // restore tosca
1824
1825 // return
1826 __ jmp(rcx);
1827 #else
1828 __ push(state);
1829 __ push(c_rarg0);
1830 __ push(c_rarg1);
1831 __ push(c_rarg2);
1832 __ push(c_rarg3);
1833 __ mov(c_rarg2, rax); // Pass itos
1834 #ifdef _WIN64
1835 __ movflt(xmm3, xmm0); // Pass ftos
1836 #endif
1837 __ call_VM(noreg,
1838 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1839 c_rarg1, c_rarg2, c_rarg3);
1840 __ pop(c_rarg3);
1841 __ pop(c_rarg2);
1842 __ pop(c_rarg1);
1843 __ pop(c_rarg0);
1844 __ pop(state);
1845 __ ret(0); // return from result handler
1846 #endif // _LP64
1847
1848 return entry;
1849 }
1850
1851 void TemplateInterpreterGenerator::count_bytecode() {
1852 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1853 }
1854
1855 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1856 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1857 }
1858
1859 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1860 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1861 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1862 __ orl(rbx,
1863 ((int) t->bytecode()) <<
1864 BytecodePairHistogram::log2_number_of_codes);
1865 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1866 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1867 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1868 }
1869
1870
1871 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1872 // Call a little run-time stub to avoid blow-up for each bytecode.
1873 // The run-time runtime saves the right registers, depending on
1874 // the tosca in-state for the given template.
1875
1876 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1877 "entry must have been generated");
1878 #ifndef _LP64
1879 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1880 #else
1881 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1882 __ andptr(rsp, -16); // align stack as required by ABI
1883 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1884 __ mov(rsp, r12); // restore sp
1885 __ reinit_heapbase();
1886 #endif // _LP64
1887 }
1888
1889
1890 void TemplateInterpreterGenerator::stop_interpreter_at() {
1891 Label L;
1892 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1893 StopInterpreterAt);
1894 __ jcc(Assembler::notEqual, L);
1895 __ int3();
1896 __ bind(L);
1897 }
1898 #endif // !PRODUCT