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 "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
224 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
225 if (JvmtiExport::can_pop_frame()) {
226 NOT_LP64(__ get_thread(java_thread));
227 __ check_and_handle_popframe(java_thread);
228 }
229 if (JvmtiExport::can_force_early_return()) {
230 NOT_LP64(__ get_thread(java_thread));
231 __ check_and_handle_earlyret(java_thread);
232 }
233
234 __ dispatch_next(state, step);
235
236 return entry;
237 }
238
239
240 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
241 address entry = __ pc();
242
243 #ifndef _LP64
244 if (state == ftos) {
245 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
246 } else if (state == dtos) {
247 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
248 }
249 #endif // _LP64
250
251 // NULL last_sp until next java call
252 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
253 __ restore_bcp();
254 __ restore_locals();
255 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
256 NOT_LP64(__ get_thread(thread));
257 #if INCLUDE_JVMCI
258 // Check if we need to take lock at entry of synchronized method. This can
259 // only occur on method entry so emit it only for vtos with step 0.
260 if ((EnableJVMCI || UseAOT) && state == vtos && step == 0) {
261 Label L;
262 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
263 __ jcc(Assembler::zero, L);
264 // Clear flag.
265 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
266 // Satisfy calling convention for lock_method().
267 __ get_method(rbx);
268 // Take lock.
269 lock_method();
270 __ bind(L);
271 } else {
272 #ifdef ASSERT
273 if (EnableJVMCI) {
274 Label L;
275 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
276 __ jccb(Assembler::zero, L);
277 __ stop("unexpected pending monitor in deopt entry");
278 __ bind(L);
279 }
280 #endif
281 }
282 #endif
283 // handle exceptions
284 {
285 Label L;
286 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
287 __ jcc(Assembler::zero, L);
288 __ call_VM(noreg,
289 CAST_FROM_FN_PTR(address,
290 InterpreterRuntime::throw_pending_exception));
291 __ should_not_reach_here();
292 __ bind(L);
293 }
294 if (continuation == NULL) {
295 __ dispatch_next(state, step);
296 } else {
297 __ jump_to_entry(continuation);
298 }
299 return entry;
300 }
301
302 address TemplateInterpreterGenerator::generate_result_handler_for(
303 BasicType type) {
304 address entry = __ pc();
305 switch (type) {
306 case T_BOOLEAN: __ c2bool(rax); break;
307 #ifndef _LP64
308 case T_CHAR : __ andptr(rax, 0xFFFF); break;
309 #else
310 case T_CHAR : __ movzwl(rax, rax); break;
311 #endif // _LP64
312 case T_BYTE : __ sign_extend_byte(rax); break;
313 case T_SHORT : __ sign_extend_short(rax); break;
314 case T_INT : /* nothing to do */ break;
315 case T_LONG : /* nothing to do */ break;
316 case T_VOID : /* nothing to do */ break;
317 #ifndef _LP64
318 case T_DOUBLE :
319 case T_FLOAT :
320 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
321 __ pop(t); // remove return address first
322 // Must return a result for interpreter or compiler. In SSE
323 // mode, results are returned in xmm0 and the FPU stack must
324 // be empty.
325 if (type == T_FLOAT && UseSSE >= 1) {
326 // Load ST0
327 __ fld_d(Address(rsp, 0));
328 // Store as float and empty fpu stack
329 __ fstp_s(Address(rsp, 0));
330 // and reload
331 __ movflt(xmm0, Address(rsp, 0));
332 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
333 __ movdbl(xmm0, Address(rsp, 0));
334 } else {
335 // restore ST0
336 __ fld_d(Address(rsp, 0));
337 }
338 // and pop the temp
339 __ addptr(rsp, 2 * wordSize);
340 __ push(t); // restore return address
341 }
342 break;
343 #else
344 case T_FLOAT : /* nothing to do */ break;
345 case T_DOUBLE : /* nothing to do */ break;
346 #endif // _LP64
347
348 case T_OBJECT :
349 // retrieve result from frame
350 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
351 // and verify it
352 __ verify_oop(rax);
353 break;
354 default : ShouldNotReachHere();
355 }
356 __ ret(0); // return from result handler
357 return entry;
358 }
359
360 address TemplateInterpreterGenerator::generate_safept_entry_for(
361 TosState state,
362 address runtime_entry) {
363 address entry = __ pc();
364 __ push(state);
365 __ call_VM(noreg, runtime_entry);
366 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
367 return entry;
368 }
369
370
371
372 // Helpers for commoning out cases in the various type of method entries.
373 //
374
375
376 // increment invocation count & check for overflow
377 //
378 // Note: checking for negative value instead of overflow
379 // so we have a 'sticky' overflow test
380 //
381 // rbx: method
382 // rcx: invocation counter
383 //
384 void TemplateInterpreterGenerator::generate_counter_incr(
385 Label* overflow,
386 Label* profile_method,
387 Label* profile_method_continue) {
388 Label done;
389 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
390 if (TieredCompilation) {
391 int increment = InvocationCounter::count_increment;
392 Label no_mdo;
393 if (ProfileInterpreter) {
394 // Are we profiling?
395 __ movptr(rax, Address(rbx, Method::method_data_offset()));
396 __ testptr(rax, rax);
397 __ jccb(Assembler::zero, no_mdo);
398 // Increment counter in the MDO
399 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
400 in_bytes(InvocationCounter::counter_offset()));
401 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
402 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
403 __ jmp(done);
404 }
405 __ bind(no_mdo);
406 // Increment counter in MethodCounters
407 const Address invocation_counter(rax,
408 MethodCounters::invocation_counter_offset() +
409 InvocationCounter::counter_offset());
410 __ get_method_counters(rbx, rax, done);
411 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
412 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
413 false, Assembler::zero, overflow);
414 __ bind(done);
415 } else { // not TieredCompilation
416 const Address backedge_counter(rax,
417 MethodCounters::backedge_counter_offset() +
418 InvocationCounter::counter_offset());
419 const Address invocation_counter(rax,
420 MethodCounters::invocation_counter_offset() +
421 InvocationCounter::counter_offset());
422
423 __ get_method_counters(rbx, rax, done);
424
425 if (ProfileInterpreter) {
426 __ incrementl(Address(rax,
427 MethodCounters::interpreter_invocation_counter_offset()));
428 }
429 // Update standard invocation counters
430 __ movl(rcx, invocation_counter);
431 __ incrementl(rcx, InvocationCounter::count_increment);
432 __ movl(invocation_counter, rcx); // save invocation count
433
434 __ movl(rax, backedge_counter); // load backedge counter
435 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
436
437 __ addl(rcx, rax); // add both counters
438
439 // profile_method is non-null only for interpreted method so
440 // profile_method != NULL == !native_call
441
442 if (ProfileInterpreter && profile_method != NULL) {
443 // Test to see if we should create a method data oop
444 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
445 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
446 __ jcc(Assembler::less, *profile_method_continue);
447
448 // if no method data exists, go to profile_method
449 __ test_method_data_pointer(rax, *profile_method);
450 }
451
452 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
453 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
454 __ jcc(Assembler::aboveEqual, *overflow);
455 __ bind(done);
456 }
457 }
458
459 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
460
461 // Asm interpreter on entry
462 // r14/rdi - locals
463 // r13/rsi - bcp
464 // rbx - method
465 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
466 // rbp - interpreter frame
467
468 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
469 // Everything as it was on entry
470 // rdx is not restored. Doesn't appear to really be set.
471
472 // InterpreterRuntime::frequency_counter_overflow takes two
473 // arguments, the first (thread) is passed by call_VM, the second
474 // indicates if the counter overflow occurs at a backwards branch
475 // (NULL bcp). We pass zero for it. The call returns the address
476 // of the verified entry point for the method or NULL if the
477 // compilation did not complete (either went background or bailed
478 // out).
479 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
480 __ movl(rarg, 0);
481 __ call_VM(noreg,
482 CAST_FROM_FN_PTR(address,
483 InterpreterRuntime::frequency_counter_overflow),
484 rarg);
485
486 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
487 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
488 // and jump to the interpreted entry.
489 __ jmp(do_continue, relocInfo::none);
490 }
491
492 // See if we've got enough room on the stack for locals plus overhead below
493 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
494 // without going through the signal handler, i.e., reserved and yellow zones
495 // will not be made usable. The shadow zone must suffice to handle the
496 // overflow.
497 // The expression stack grows down incrementally, so the normal guard
498 // page mechanism will work for that.
499 //
500 // NOTE: Since the additional locals are also always pushed (wasn't
501 // obvious in generate_fixed_frame) so the guard should work for them
502 // too.
503 //
504 // Args:
505 // rdx: number of additional locals this frame needs (what we must check)
506 // rbx: Method*
507 //
508 // Kills:
509 // rax
510 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
511
512 // monitor entry size: see picture of stack in frame_x86.hpp
513 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
514
515 // total overhead size: entry_size + (saved rbp through expr stack
516 // bottom). be sure to change this if you add/subtract anything
517 // to/from the overhead area
518 const int overhead_size =
519 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
520
521 const int page_size = os::vm_page_size();
522
523 Label after_frame_check;
524
525 // see if the frame is greater than one page in size. If so,
526 // then we need to verify there is enough stack space remaining
527 // for the additional locals.
528 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
529 __ jcc(Assembler::belowEqual, after_frame_check);
530
531 // compute rsp as if this were going to be the last frame on
532 // the stack before the red zone
533
534 Label after_frame_check_pop;
535 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
536 #ifndef _LP64
537 __ push(thread);
538 __ get_thread(thread);
539 #endif
540
541 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
542
543 // locals + overhead, in bytes
544 __ mov(rax, rdx);
545 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
546 __ addptr(rax, overhead_size);
547
548 #ifdef ASSERT
549 Label limit_okay;
550 // Verify that thread stack overflow limit is non-zero.
551 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
552 __ jcc(Assembler::notEqual, limit_okay);
553 __ stop("stack overflow limit is zero");
554 __ bind(limit_okay);
555 #endif
556
557 // Add locals/frame size to stack limit.
558 __ addptr(rax, stack_limit);
559
560 // Check against the current stack bottom.
561 __ cmpptr(rsp, rax);
562
563 __ jcc(Assembler::above, after_frame_check_pop);
564 NOT_LP64(__ pop(rsi)); // get saved bcp
565
566 // Restore sender's sp as SP. This is necessary if the sender's
567 // frame is an extended compiled frame (see gen_c2i_adapter())
568 // and safer anyway in case of JSR292 adaptations.
569
570 __ pop(rax); // return address must be moved if SP is changed
571 __ mov(rsp, rbcp);
572 __ push(rax);
573
574 // Note: the restored frame is not necessarily interpreted.
575 // Use the shared runtime version of the StackOverflowError.
576 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
577 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
578 // all done with frame size check
579 __ bind(after_frame_check_pop);
580 NOT_LP64(__ pop(rsi));
581
582 // all done with frame size check
583 __ bind(after_frame_check);
584 }
585
586 // Allocate monitor and lock method (asm interpreter)
587 //
588 // Args:
589 // rbx: Method*
590 // r14/rdi: locals
591 //
592 // Kills:
593 // rax
594 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
595 // rscratch1, rscratch2 (scratch regs)
596 void TemplateInterpreterGenerator::lock_method() {
597 // synchronize method
598 const Address access_flags(rbx, Method::access_flags_offset());
599 const Address monitor_block_top(
600 rbp,
601 frame::interpreter_frame_monitor_block_top_offset * wordSize);
602 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
603
604 #ifdef ASSERT
605 {
606 Label L;
607 __ movl(rax, access_flags);
608 __ testl(rax, JVM_ACC_SYNCHRONIZED);
609 __ jcc(Assembler::notZero, L);
610 __ stop("method doesn't need synchronization");
611 __ bind(L);
612 }
613 #endif // ASSERT
614
615 // get synchronization object
616 {
617 Label done;
618 __ movl(rax, access_flags);
619 __ testl(rax, JVM_ACC_STATIC);
620 // get receiver (assume this is frequent case)
621 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
622 __ jcc(Assembler::zero, done);
623 __ load_mirror(rax, rbx);
624
625 #ifdef ASSERT
626 {
627 Label L;
628 __ testptr(rax, rax);
629 __ jcc(Assembler::notZero, L);
630 __ stop("synchronization object is NULL");
631 __ bind(L);
632 }
633 #endif // ASSERT
634
635 __ bind(done);
636 __ resolve_for_write(0, rax);
637 }
638
639 // add space for monitor & lock
640 __ subptr(rsp, entry_size); // add space for a monitor entry
641 __ movptr(monitor_block_top, rsp); // set new monitor block top
642 // store object
643 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
644 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
645 __ movptr(lockreg, rsp); // object address
646 __ lock_object(lockreg);
647 }
648
649 // Generate a fixed interpreter frame. This is identical setup for
650 // interpreted methods and for native methods hence the shared code.
651 //
652 // Args:
653 // rax: return address
654 // rbx: Method*
655 // r14/rdi: pointer to locals
656 // r13/rsi: sender sp
657 // rdx: cp cache
658 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
659 // initialize fixed part of activation frame
660 __ push(rax); // save return address
661 __ enter(); // save old & set new rbp
662 __ push(rbcp); // set sender sp
663 __ push((int)NULL_WORD); // leave last_sp as null
664 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
665 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
666 __ push(rbx); // save Method*
667 // Get mirror and store it in the frame as GC root for this Method*
668 __ load_mirror(rdx, rbx);
669 __ push(rdx);
670 if (ProfileInterpreter) {
671 Label method_data_continue;
672 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
673 __ testptr(rdx, rdx);
674 __ jcc(Assembler::zero, method_data_continue);
675 __ addptr(rdx, in_bytes(MethodData::data_offset()));
676 __ bind(method_data_continue);
677 __ push(rdx); // set the mdp (method data pointer)
678 } else {
679 __ push(0);
680 }
681
682 __ movptr(rdx, Address(rbx, Method::const_offset()));
683 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
684 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
685 __ push(rdx); // set constant pool cache
686 __ push(rlocals); // set locals pointer
687 if (native_call) {
688 __ push(0); // no bcp
689 } else {
690 __ push(rbcp); // set bcp
691 }
692 __ push(0); // reserve word for pointer to expression stack bottom
693 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
694 }
695
696 // End of helpers
697
698 // Method entry for java.lang.ref.Reference.get.
699 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
700 // Code: _aload_0, _getfield, _areturn
701 // parameter size = 1
702 //
703 // The code that gets generated by this routine is split into 2 parts:
704 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load,
705 // 2. The slow path - which is an expansion of the regular method entry.
706 //
707 // Notes:-
708 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed.
709 // * We may jump to the slow path iff the receiver is null. If the
710 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load
711 // Thus we can use the regular method entry code to generate the NPE.
712 //
713 // rbx: Method*
714
715 // r13: senderSP must preserve for slow path, set SP to it on fast path
716
717 address entry = __ pc();
718
719 const int referent_offset = java_lang_ref_Reference::referent_offset;
720 guarantee(referent_offset > 0, "referent offset not initialized");
721
722 Label slow_path;
723 // rbx: method
724
725 // Check if local 0 != NULL
726 // If the receiver is null then it is OK to jump to the slow path.
727 __ movptr(rax, Address(rsp, wordSize));
728
729 __ testptr(rax, rax);
730 __ jcc(Assembler::zero, slow_path);
731
732 // rax: local 0
733 // rbx: method (but can be used as scratch now)
734 // rdx: scratch
735 // rdi: scratch
736
737 // Preserve the sender sp in case the load barrier
738 // calls the runtime
739 NOT_LP64(__ push(rsi));
740
741 // Load the value of the referent field.
742 __ resolve_for_read(OOP_NOT_NULL, rax);
743 const Address field_address(rax, referent_offset);
744 __ load_heap_oop(rax, field_address, /*tmp1*/ rbx, /*tmp_thread*/ rdx, ON_WEAK_OOP_REF);
745
746 // _areturn
747 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
748 NOT_LP64(__ pop(rsi)); // get sender sp
749 __ pop(rdi); // get return address
750 __ mov(rsp, sender_sp); // set sp to sender sp
751 __ jmp(rdi);
752 __ ret(0);
753
754 // generate a vanilla interpreter entry as the slow path
755 __ bind(slow_path);
756 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
757 return entry;
758 }
759
760 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
761 // Quick & dirty stack overflow checking: bang the stack & handle trap.
762 // Note that we do the banging after the frame is setup, since the exception
763 // handling code expects to find a valid interpreter frame on the stack.
764 // Doing the banging earlier fails if the caller frame is not an interpreter
765 // frame.
766 // (Also, the exception throwing code expects to unlock any synchronized
767 // method receiever, so do the banging after locking the receiver.)
768
769 // Bang each page in the shadow zone. We can't assume it's been done for
770 // an interpreter frame with greater than a page of locals, so each page
771 // needs to be checked. Only true for non-native.
772 if (UseStackBanging) {
773 const int page_size = os::vm_page_size();
774 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size;
775 const int start_page = native_call ? n_shadow_pages : 1;
776 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
777 __ bang_stack_with_offset(pages*page_size);
778 }
779 }
780 }
781
782 // Interpreter stub for calling a native method. (asm interpreter)
783 // This sets up a somewhat different looking stack for calling the
784 // native method than the typical interpreter frame setup.
785 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
786 // determine code generation flags
787 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
788
789 // rbx: Method*
790 // rbcp: sender sp
791
792 address entry_point = __ pc();
793
794 const Address constMethod (rbx, Method::const_offset());
795 const Address access_flags (rbx, Method::access_flags_offset());
796 const Address size_of_parameters(rcx, ConstMethod::
797 size_of_parameters_offset());
798
799
800 // get parameter size (always needed)
801 __ movptr(rcx, constMethod);
802 __ load_unsigned_short(rcx, size_of_parameters);
803
804 // native calls don't need the stack size check since they have no
805 // expression stack and the arguments are already on the stack and
806 // we only add a handful of words to the stack
807
808 // rbx: Method*
809 // rcx: size of parameters
810 // rbcp: sender sp
811 __ pop(rax); // get return address
812
813 // for natives the size of locals is zero
814
815 // compute beginning of parameters
816 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
817
818 // add 2 zero-initialized slots for native calls
819 // initialize result_handler slot
820 __ push((int) NULL_WORD);
821 // slot for oop temp
822 // (static native method holder mirror/jni oop result)
823 __ push((int) NULL_WORD);
824
825 // initialize fixed part of activation frame
826 generate_fixed_frame(true);
827
828 // make sure method is native & not abstract
829 #ifdef ASSERT
830 __ movl(rax, access_flags);
831 {
832 Label L;
833 __ testl(rax, JVM_ACC_NATIVE);
834 __ jcc(Assembler::notZero, L);
835 __ stop("tried to execute non-native method as native");
836 __ bind(L);
837 }
838 {
839 Label L;
840 __ testl(rax, JVM_ACC_ABSTRACT);
841 __ jcc(Assembler::zero, L);
842 __ stop("tried to execute abstract method in interpreter");
843 __ bind(L);
844 }
845 #endif
846
847 // Since at this point in the method invocation the exception handler
848 // would try to exit the monitor of synchronized methods which hasn't
849 // been entered yet, we set the thread local variable
850 // _do_not_unlock_if_synchronized to true. The remove_activation will
851 // check this flag.
852
853 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
854 NOT_LP64(__ get_thread(thread1));
855 const Address do_not_unlock_if_synchronized(thread1,
856 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
857 __ movbool(do_not_unlock_if_synchronized, true);
858
859 // increment invocation count & check for overflow
860 Label invocation_counter_overflow;
861 if (inc_counter) {
862 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
863 }
864
865 Label continue_after_compile;
866 __ bind(continue_after_compile);
867
868 bang_stack_shadow_pages(true);
869
870 // reset the _do_not_unlock_if_synchronized flag
871 NOT_LP64(__ get_thread(thread1));
872 __ movbool(do_not_unlock_if_synchronized, false);
873
874 // check for synchronized methods
875 // Must happen AFTER invocation_counter check and stack overflow check,
876 // so method is not locked if overflows.
877 if (synchronized) {
878 lock_method();
879 } else {
880 // no synchronization necessary
881 #ifdef ASSERT
882 {
883 Label L;
884 __ movl(rax, access_flags);
885 __ testl(rax, JVM_ACC_SYNCHRONIZED);
886 __ jcc(Assembler::zero, L);
887 __ stop("method needs synchronization");
888 __ bind(L);
889 }
890 #endif
891 }
892
893 // start execution
894 #ifdef ASSERT
895 {
896 Label L;
897 const Address monitor_block_top(rbp,
898 frame::interpreter_frame_monitor_block_top_offset * wordSize);
899 __ movptr(rax, monitor_block_top);
900 __ cmpptr(rax, rsp);
901 __ jcc(Assembler::equal, L);
902 __ stop("broken stack frame setup in interpreter");
903 __ bind(L);
904 }
905 #endif
906
907 // jvmti support
908 __ notify_method_entry();
909
910 // work registers
911 const Register method = rbx;
912 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
913 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
914
915 // allocate space for parameters
916 __ get_method(method);
917 __ movptr(t, Address(method, Method::const_offset()));
918 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
919
920 #ifndef _LP64
921 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
922 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
923 __ subptr(rsp, t);
924 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
925 #else
926 __ shll(t, Interpreter::logStackElementSize);
927
928 __ subptr(rsp, t);
929 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
930 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
931 #endif // _LP64
932
933 // get signature handler
934 {
935 Label L;
936 __ movptr(t, Address(method, Method::signature_handler_offset()));
937 __ testptr(t, t);
938 __ jcc(Assembler::notZero, L);
939 __ call_VM(noreg,
940 CAST_FROM_FN_PTR(address,
941 InterpreterRuntime::prepare_native_call),
942 method);
943 __ get_method(method);
944 __ movptr(t, Address(method, Method::signature_handler_offset()));
945 __ bind(L);
946 }
947
948 // call signature handler
949 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
950 "adjust this code");
951 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
952 "adjust this code");
953 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
954 "adjust this code");
955
956 // The generated handlers do not touch RBX (the method oop).
957 // However, large signatures cannot be cached and are generated
958 // each time here. The slow-path generator can do a GC on return,
959 // so we must reload it after the call.
960 __ call(t);
961 __ get_method(method); // slow path can do a GC, reload RBX
962
963
964 // result handler is in rax
965 // set result handler
966 __ movptr(Address(rbp,
967 (frame::interpreter_frame_result_handler_offset) * wordSize),
968 rax);
969
970 // pass mirror handle if static call
971 {
972 Label L;
973 __ movl(t, Address(method, Method::access_flags_offset()));
974 __ testl(t, JVM_ACC_STATIC);
975 __ jcc(Assembler::zero, L);
976 // get mirror
977 __ load_mirror(t, method);
978 // copy mirror into activation frame
979 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
980 t);
981 // pass handle to mirror
982 #ifndef _LP64
983 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
984 __ movptr(Address(rsp, wordSize), t);
985 #else
986 __ lea(c_rarg1,
987 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
988 #endif // _LP64
989 __ bind(L);
990 }
991
992 // get native function entry point
993 {
994 Label L;
995 __ movptr(rax, Address(method, Method::native_function_offset()));
996 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
997 __ cmpptr(rax, unsatisfied.addr());
998 __ jcc(Assembler::notEqual, L);
999 __ call_VM(noreg,
1000 CAST_FROM_FN_PTR(address,
1001 InterpreterRuntime::prepare_native_call),
1002 method);
1003 __ get_method(method);
1004 __ movptr(rax, Address(method, Method::native_function_offset()));
1005 __ bind(L);
1006 }
1007
1008 // pass JNIEnv
1009 #ifndef _LP64
1010 __ get_thread(thread);
1011 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1012 __ movptr(Address(rsp, 0), t);
1013
1014 // set_last_Java_frame_before_call
1015 // It is enough that the pc()
1016 // points into the right code segment. It does not have to be the correct return pc.
1017 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1018 #else
1019 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1020
1021 // It is enough that the pc() points into the right code
1022 // segment. It does not have to be the correct return pc.
1023 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1024 #endif // _LP64
1025
1026 // change thread state
1027 #ifdef ASSERT
1028 {
1029 Label L;
1030 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1031 __ cmpl(t, _thread_in_Java);
1032 __ jcc(Assembler::equal, L);
1033 __ stop("Wrong thread state in native stub");
1034 __ bind(L);
1035 }
1036 #endif
1037
1038 // Change state to native
1039
1040 __ movl(Address(thread, JavaThread::thread_state_offset()),
1041 _thread_in_native);
1042
1043 // Call the native method.
1044 __ call(rax);
1045 // 32: result potentially in rdx:rax or ST0
1046 // 64: result potentially in rax or xmm0
1047
1048 // Verify or restore cpu control state after JNI call
1049 __ restore_cpu_control_state_after_jni();
1050
1051 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1052 // in order to extract the result of a method call. If the order of these
1053 // pushes change or anything else is added to the stack then the code in
1054 // interpreter_frame_result must also change.
1055
1056 #ifndef _LP64
1057 // save potential result in ST(0) & rdx:rax
1058 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1059 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1060 // It is safe to do this push because state is _thread_in_native and return address will be found
1061 // via _last_native_pc and not via _last_jave_sp
1062
1063 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1064 // If the order changes or anything else is added to the stack the code in
1065 // interpreter_frame_result will have to be changed.
1066
1067 { Label L;
1068 Label push_double;
1069 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1070 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1071 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1072 float_handler.addr());
1073 __ jcc(Assembler::equal, push_double);
1074 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1075 double_handler.addr());
1076 __ jcc(Assembler::notEqual, L);
1077 __ bind(push_double);
1078 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1079 __ bind(L);
1080 }
1081 #else
1082 __ push(dtos);
1083 #endif // _LP64
1084
1085 __ push(ltos);
1086
1087 // change thread state
1088 NOT_LP64(__ get_thread(thread));
1089 __ movl(Address(thread, JavaThread::thread_state_offset()),
1090 _thread_in_native_trans);
1091
1092 if (os::is_MP()) {
1093 if (UseMembar) {
1094 // Force this write out before the read below
1095 __ membar(Assembler::Membar_mask_bits(
1096 Assembler::LoadLoad | Assembler::LoadStore |
1097 Assembler::StoreLoad | Assembler::StoreStore));
1098 } else {
1099 // Write serialization page so VM thread can do a pseudo remote membar.
1100 // We use the current thread pointer to calculate a thread specific
1101 // offset to write to within the page. This minimizes bus traffic
1102 // due to cache line collision.
1103 __ serialize_memory(thread, rcx);
1104 }
1105 }
1106
1107 #ifndef _LP64
1108 if (AlwaysRestoreFPU) {
1109 // Make sure the control word is correct.
1110 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1111 }
1112 #endif // _LP64
1113
1114 // check for safepoint operation in progress and/or pending suspend requests
1115 {
1116 Label Continue;
1117 Label slow_path;
1118
1119 #ifndef _LP64
1120 __ safepoint_poll(slow_path, thread, noreg);
1121 #else
1122 __ safepoint_poll(slow_path, r15_thread, rscratch1);
1123 #endif
1124
1125 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1126 __ jcc(Assembler::equal, Continue);
1127 __ bind(slow_path);
1128
1129 // Don't use call_VM as it will see a possible pending exception
1130 // and forward it and never return here preventing us from
1131 // clearing _last_native_pc down below. Also can't use
1132 // call_VM_leaf either as it will check to see if r13 & r14 are
1133 // preserved and correspond to the bcp/locals pointers. So we do a
1134 // runtime call by hand.
1135 //
1136 #ifndef _LP64
1137 __ push(thread);
1138 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1139 JavaThread::check_special_condition_for_native_trans)));
1140 __ increment(rsp, wordSize);
1141 __ get_thread(thread);
1142 #else
1143 __ mov(c_rarg0, r15_thread);
1144 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1145 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1146 __ andptr(rsp, -16); // align stack as required by ABI
1147 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1148 __ mov(rsp, r12); // restore sp
1149 __ reinit_heapbase();
1150 #endif // _LP64
1151 __ bind(Continue);
1152 }
1153
1154 // change thread state
1155 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1156
1157 // reset_last_Java_frame
1158 __ reset_last_Java_frame(thread, true);
1159
1160 if (CheckJNICalls) {
1161 // clear_pending_jni_exception_check
1162 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1163 }
1164
1165 // reset handle block
1166 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1167 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1168
1169 // If result is an oop unbox and store it in frame where gc will see it
1170 // and result handler will pick it up
1171
1172 {
1173 Label no_oop, not_weak, store_result;
1174 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1175 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1176 __ jcc(Assembler::notEqual, no_oop);
1177 // retrieve result
1178 __ pop(ltos);
1179 // Unbox oop result, e.g. JNIHandles::resolve value.
1180 __ resolve_jobject(rax /* value */,
1181 thread /* thread */,
1182 t /* tmp */);
1183 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1184 // keep stack depth as expected by pushing oop which will eventually be discarded
1185 __ push(ltos);
1186 __ bind(no_oop);
1187 }
1188
1189
1190 {
1191 Label no_reguard;
1192 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1193 JavaThread::stack_guard_yellow_reserved_disabled);
1194 __ jcc(Assembler::notEqual, no_reguard);
1195
1196 __ pusha(); // XXX only save smashed registers
1197 #ifndef _LP64
1198 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1199 __ popa();
1200 #else
1201 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1202 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1203 __ andptr(rsp, -16); // align stack as required by ABI
1204 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1205 __ mov(rsp, r12); // restore sp
1206 __ popa(); // XXX only restore smashed registers
1207 __ reinit_heapbase();
1208 #endif // _LP64
1209
1210 __ bind(no_reguard);
1211 }
1212
1213
1214 // The method register is junk from after the thread_in_native transition
1215 // until here. Also can't call_VM until the bcp has been
1216 // restored. Need bcp for throwing exception below so get it now.
1217 __ get_method(method);
1218
1219 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1220 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1221 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1222
1223 // handle exceptions (exception handling will handle unlocking!)
1224 {
1225 Label L;
1226 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1227 __ jcc(Assembler::zero, L);
1228 // Note: At some point we may want to unify this with the code
1229 // used in call_VM_base(); i.e., we should use the
1230 // StubRoutines::forward_exception code. For now this doesn't work
1231 // here because the rsp is not correctly set at this point.
1232 __ MacroAssembler::call_VM(noreg,
1233 CAST_FROM_FN_PTR(address,
1234 InterpreterRuntime::throw_pending_exception));
1235 __ should_not_reach_here();
1236 __ bind(L);
1237 }
1238
1239 // do unlocking if necessary
1240 {
1241 Label L;
1242 __ movl(t, Address(method, Method::access_flags_offset()));
1243 __ testl(t, JVM_ACC_SYNCHRONIZED);
1244 __ jcc(Assembler::zero, L);
1245 // the code below should be shared with interpreter macro
1246 // assembler implementation
1247 {
1248 Label unlock;
1249 // BasicObjectLock will be first in list, since this is a
1250 // synchronized method. However, need to check that the object
1251 // has not been unlocked by an explicit monitorexit bytecode.
1252 const Address monitor(rbp,
1253 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1254 wordSize - (int)sizeof(BasicObjectLock)));
1255
1256 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1257
1258 // monitor expect in c_rarg1 for slow unlock path
1259 __ lea(regmon, monitor); // address of first monitor
1260
1261 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1262 __ testptr(t, t);
1263 __ jcc(Assembler::notZero, unlock);
1264
1265 // Entry already unlocked, need to throw exception
1266 __ MacroAssembler::call_VM(noreg,
1267 CAST_FROM_FN_PTR(address,
1268 InterpreterRuntime::throw_illegal_monitor_state_exception));
1269 __ should_not_reach_here();
1270
1271 __ bind(unlock);
1272 __ unlock_object(regmon);
1273 }
1274 __ bind(L);
1275 }
1276
1277 // jvmti support
1278 // Note: This must happen _after_ handling/throwing any exceptions since
1279 // the exception handler code notifies the runtime of method exits
1280 // too. If this happens before, method entry/exit notifications are
1281 // not properly paired (was bug - gri 11/22/99).
1282 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1283
1284 // restore potential result in edx:eax, call result handler to
1285 // restore potential result in ST0 & handle result
1286
1287 __ pop(ltos);
1288 LP64_ONLY( __ pop(dtos));
1289
1290 __ movptr(t, Address(rbp,
1291 (frame::interpreter_frame_result_handler_offset) * wordSize));
1292 __ call(t);
1293
1294 // remove activation
1295 __ movptr(t, Address(rbp,
1296 frame::interpreter_frame_sender_sp_offset *
1297 wordSize)); // get sender sp
1298 __ leave(); // remove frame anchor
1299 __ pop(rdi); // get return address
1300 __ mov(rsp, t); // set sp to sender sp
1301 __ jmp(rdi);
1302
1303 if (inc_counter) {
1304 // Handle overflow of counter and compile method
1305 __ bind(invocation_counter_overflow);
1306 generate_counter_overflow(continue_after_compile);
1307 }
1308
1309 return entry_point;
1310 }
1311
1312 // Abstract method entry
1313 // Attempt to execute abstract method. Throw exception
1314 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1315
1316 address entry_point = __ pc();
1317
1318 // abstract method entry
1319
1320 // pop return address, reset last_sp to NULL
1321 __ empty_expression_stack();
1322 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1323 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1324
1325 // throw exception
1326 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), rbx);
1327 // the call_VM checks for exception, so we should never return here.
1328 __ should_not_reach_here();
1329
1330 return entry_point;
1331 }
1332
1333 //
1334 // Generic interpreted method entry to (asm) interpreter
1335 //
1336 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1337 // determine code generation flags
1338 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1339
1340 // ebx: Method*
1341 // rbcp: sender sp
1342 address entry_point = __ pc();
1343
1344 const Address constMethod(rbx, Method::const_offset());
1345 const Address access_flags(rbx, Method::access_flags_offset());
1346 const Address size_of_parameters(rdx,
1347 ConstMethod::size_of_parameters_offset());
1348 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1349
1350
1351 // get parameter size (always needed)
1352 __ movptr(rdx, constMethod);
1353 __ load_unsigned_short(rcx, size_of_parameters);
1354
1355 // rbx: Method*
1356 // rcx: size of parameters
1357 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1358
1359 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1360 __ subl(rdx, rcx); // rdx = no. of additional locals
1361
1362 // YYY
1363 // __ incrementl(rdx);
1364 // __ andl(rdx, -2);
1365
1366 // see if we've got enough room on the stack for locals plus overhead.
1367 generate_stack_overflow_check();
1368
1369 // get return address
1370 __ pop(rax);
1371
1372 // compute beginning of parameters
1373 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1374
1375 // rdx - # of additional locals
1376 // allocate space for locals
1377 // explicitly initialize locals
1378 {
1379 Label exit, loop;
1380 __ testl(rdx, rdx);
1381 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1382 __ bind(loop);
1383 __ push((int) NULL_WORD); // initialize local variables
1384 __ decrementl(rdx); // until everything initialized
1385 __ jcc(Assembler::greater, loop);
1386 __ bind(exit);
1387 }
1388
1389 // initialize fixed part of activation frame
1390 generate_fixed_frame(false);
1391
1392 // make sure method is not native & not abstract
1393 #ifdef ASSERT
1394 __ movl(rax, access_flags);
1395 {
1396 Label L;
1397 __ testl(rax, JVM_ACC_NATIVE);
1398 __ jcc(Assembler::zero, L);
1399 __ stop("tried to execute native method as non-native");
1400 __ bind(L);
1401 }
1402 {
1403 Label L;
1404 __ testl(rax, JVM_ACC_ABSTRACT);
1405 __ jcc(Assembler::zero, L);
1406 __ stop("tried to execute abstract method in interpreter");
1407 __ bind(L);
1408 }
1409 #endif
1410
1411 // Since at this point in the method invocation the exception
1412 // handler would try to exit the monitor of synchronized methods
1413 // which hasn't been entered yet, we set the thread local variable
1414 // _do_not_unlock_if_synchronized to true. The remove_activation
1415 // will check this flag.
1416
1417 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1418 NOT_LP64(__ get_thread(thread));
1419 const Address do_not_unlock_if_synchronized(thread,
1420 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1421 __ movbool(do_not_unlock_if_synchronized, true);
1422
1423 __ profile_parameters_type(rax, rcx, rdx);
1424 // increment invocation count & check for overflow
1425 Label invocation_counter_overflow;
1426 Label profile_method;
1427 Label profile_method_continue;
1428 if (inc_counter) {
1429 generate_counter_incr(&invocation_counter_overflow,
1430 &profile_method,
1431 &profile_method_continue);
1432 if (ProfileInterpreter) {
1433 __ bind(profile_method_continue);
1434 }
1435 }
1436
1437 Label continue_after_compile;
1438 __ bind(continue_after_compile);
1439
1440 // check for synchronized interpreted methods
1441 bang_stack_shadow_pages(false);
1442
1443 // reset the _do_not_unlock_if_synchronized flag
1444 NOT_LP64(__ get_thread(thread));
1445 __ movbool(do_not_unlock_if_synchronized, false);
1446
1447 // check for synchronized methods
1448 // Must happen AFTER invocation_counter check and stack overflow check,
1449 // so method is not locked if overflows.
1450 if (synchronized) {
1451 // Allocate monitor and lock method
1452 lock_method();
1453 } else {
1454 // no synchronization necessary
1455 #ifdef ASSERT
1456 {
1457 Label L;
1458 __ movl(rax, access_flags);
1459 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1460 __ jcc(Assembler::zero, L);
1461 __ stop("method needs synchronization");
1462 __ bind(L);
1463 }
1464 #endif
1465 }
1466
1467 // start execution
1468 #ifdef ASSERT
1469 {
1470 Label L;
1471 const Address monitor_block_top (rbp,
1472 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1473 __ movptr(rax, monitor_block_top);
1474 __ cmpptr(rax, rsp);
1475 __ jcc(Assembler::equal, L);
1476 __ stop("broken stack frame setup in interpreter");
1477 __ bind(L);
1478 }
1479 #endif
1480
1481 // jvmti support
1482 __ notify_method_entry();
1483
1484 __ dispatch_next(vtos);
1485
1486 // invocation counter overflow
1487 if (inc_counter) {
1488 if (ProfileInterpreter) {
1489 // We have decided to profile this method in the interpreter
1490 __ bind(profile_method);
1491 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1492 __ set_method_data_pointer_for_bcp();
1493 __ get_method(rbx);
1494 __ jmp(profile_method_continue);
1495 }
1496 // Handle overflow of counter and compile method
1497 __ bind(invocation_counter_overflow);
1498 generate_counter_overflow(continue_after_compile);
1499 }
1500
1501 return entry_point;
1502 }
1503
1504 //-----------------------------------------------------------------------------
1505 // Exceptions
1506
1507 void TemplateInterpreterGenerator::generate_throw_exception() {
1508 // Entry point in previous activation (i.e., if the caller was
1509 // interpreted)
1510 Interpreter::_rethrow_exception_entry = __ pc();
1511 // Restore sp to interpreter_frame_last_sp even though we are going
1512 // to empty the expression stack for the exception processing.
1513 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1514 // rax: exception
1515 // rdx: return address/pc that threw exception
1516 __ restore_bcp(); // r13/rsi points to call/send
1517 __ restore_locals();
1518 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1519 // Entry point for exceptions thrown within interpreter code
1520 Interpreter::_throw_exception_entry = __ pc();
1521 // expression stack is undefined here
1522 // rax: exception
1523 // r13/rsi: exception bcp
1524 __ verify_oop(rax);
1525 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1526 LP64_ONLY(__ mov(c_rarg1, rax));
1527
1528 // expression stack must be empty before entering the VM in case of
1529 // an exception
1530 __ empty_expression_stack();
1531 // find exception handler address and preserve exception oop
1532 __ call_VM(rdx,
1533 CAST_FROM_FN_PTR(address,
1534 InterpreterRuntime::exception_handler_for_exception),
1535 rarg);
1536 // rax: exception handler entry point
1537 // rdx: preserved exception oop
1538 // r13/rsi: bcp for exception handler
1539 __ push_ptr(rdx); // push exception which is now the only value on the stack
1540 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1541
1542 // If the exception is not handled in the current frame the frame is
1543 // removed and the exception is rethrown (i.e. exception
1544 // continuation is _rethrow_exception).
1545 //
1546 // Note: At this point the bci is still the bxi for the instruction
1547 // which caused the exception and the expression stack is
1548 // empty. Thus, for any VM calls at this point, GC will find a legal
1549 // oop map (with empty expression stack).
1550
1551 // In current activation
1552 // tos: exception
1553 // esi: exception bcp
1554
1555 //
1556 // JVMTI PopFrame support
1557 //
1558
1559 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1560 __ empty_expression_stack();
1561 // Set the popframe_processing bit in pending_popframe_condition
1562 // indicating that we are currently handling popframe, so that
1563 // call_VMs that may happen later do not trigger new popframe
1564 // handling cycles.
1565 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1566 NOT_LP64(__ get_thread(thread));
1567 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1568 __ orl(rdx, JavaThread::popframe_processing_bit);
1569 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1570
1571 {
1572 // Check to see whether we are returning to a deoptimized frame.
1573 // (The PopFrame call ensures that the caller of the popped frame is
1574 // either interpreted or compiled and deoptimizes it if compiled.)
1575 // In this case, we can't call dispatch_next() after the frame is
1576 // popped, but instead must save the incoming arguments and restore
1577 // them after deoptimization has occurred.
1578 //
1579 // Note that we don't compare the return PC against the
1580 // deoptimization blob's unpack entry because of the presence of
1581 // adapter frames in C2.
1582 Label caller_not_deoptimized;
1583 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1584 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1585 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1586 InterpreterRuntime::interpreter_contains), rarg);
1587 __ testl(rax, rax);
1588 __ jcc(Assembler::notZero, caller_not_deoptimized);
1589
1590 // Compute size of arguments for saving when returning to
1591 // deoptimized caller
1592 __ get_method(rax);
1593 __ movptr(rax, Address(rax, Method::const_offset()));
1594 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1595 size_of_parameters_offset())));
1596 __ shll(rax, Interpreter::logStackElementSize);
1597 __ restore_locals();
1598 __ subptr(rlocals, rax);
1599 __ addptr(rlocals, wordSize);
1600 // Save these arguments
1601 NOT_LP64(__ get_thread(thread));
1602 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1603 Deoptimization::
1604 popframe_preserve_args),
1605 thread, rax, rlocals);
1606
1607 __ remove_activation(vtos, rdx,
1608 /* throw_monitor_exception */ false,
1609 /* install_monitor_exception */ false,
1610 /* notify_jvmdi */ false);
1611
1612 // Inform deoptimization that it is responsible for restoring
1613 // these arguments
1614 NOT_LP64(__ get_thread(thread));
1615 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1616 JavaThread::popframe_force_deopt_reexecution_bit);
1617
1618 // Continue in deoptimization handler
1619 __ jmp(rdx);
1620
1621 __ bind(caller_not_deoptimized);
1622 }
1623
1624 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1625 /* throw_monitor_exception */ false,
1626 /* install_monitor_exception */ false,
1627 /* notify_jvmdi */ false);
1628
1629 // Finish with popframe handling
1630 // A previous I2C followed by a deoptimization might have moved the
1631 // outgoing arguments further up the stack. PopFrame expects the
1632 // mutations to those outgoing arguments to be preserved and other
1633 // constraints basically require this frame to look exactly as
1634 // though it had previously invoked an interpreted activation with
1635 // no space between the top of the expression stack (current
1636 // last_sp) and the top of stack. Rather than force deopt to
1637 // maintain this kind of invariant all the time we call a small
1638 // fixup routine to move the mutated arguments onto the top of our
1639 // expression stack if necessary.
1640 #ifndef _LP64
1641 __ mov(rax, rsp);
1642 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1643 __ get_thread(thread);
1644 // PC must point into interpreter here
1645 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1646 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1647 __ get_thread(thread);
1648 #else
1649 __ mov(c_rarg1, rsp);
1650 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1651 // PC must point into interpreter here
1652 __ set_last_Java_frame(noreg, rbp, __ pc());
1653 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1654 #endif
1655 __ reset_last_Java_frame(thread, true);
1656
1657 // Restore the last_sp and null it out
1658 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1659 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1660
1661 __ restore_bcp();
1662 __ restore_locals();
1663 // The method data pointer was incremented already during
1664 // call profiling. We have to restore the mdp for the current bcp.
1665 if (ProfileInterpreter) {
1666 __ set_method_data_pointer_for_bcp();
1667 }
1668
1669 // Clear the popframe condition flag
1670 NOT_LP64(__ get_thread(thread));
1671 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1672 JavaThread::popframe_inactive);
1673
1674 #if INCLUDE_JVMTI
1675 {
1676 Label L_done;
1677 const Register local0 = rlocals;
1678
1679 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1680 __ jcc(Assembler::notEqual, L_done);
1681
1682 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1683 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1684
1685 __ get_method(rdx);
1686 __ movptr(rax, Address(local0, 0));
1687 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1688
1689 __ testptr(rax, rax);
1690 __ jcc(Assembler::zero, L_done);
1691
1692 __ movptr(Address(rbx, 0), rax);
1693 __ bind(L_done);
1694 }
1695 #endif // INCLUDE_JVMTI
1696
1697 __ dispatch_next(vtos);
1698 // end of PopFrame support
1699
1700 Interpreter::_remove_activation_entry = __ pc();
1701
1702 // preserve exception over this code sequence
1703 __ pop_ptr(rax);
1704 NOT_LP64(__ get_thread(thread));
1705 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1706 // remove the activation (without doing throws on illegalMonitorExceptions)
1707 __ remove_activation(vtos, rdx, false, true, false);
1708 // restore exception
1709 NOT_LP64(__ get_thread(thread));
1710 __ get_vm_result(rax, thread);
1711
1712 // In between activations - previous activation type unknown yet
1713 // compute continuation point - the continuation point expects the
1714 // following registers set up:
1715 //
1716 // rax: exception
1717 // rdx: return address/pc that threw exception
1718 // rsp: expression stack of caller
1719 // rbp: ebp of caller
1720 __ push(rax); // save exception
1721 __ push(rdx); // save return address
1722 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1723 SharedRuntime::exception_handler_for_return_address),
1724 thread, rdx);
1725 __ mov(rbx, rax); // save exception handler
1726 __ pop(rdx); // restore return address
1727 __ pop(rax); // restore exception
1728 // Note that an "issuing PC" is actually the next PC after the call
1729 __ jmp(rbx); // jump to exception
1730 // handler of caller
1731 }
1732
1733
1734 //
1735 // JVMTI ForceEarlyReturn support
1736 //
1737 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1738 address entry = __ pc();
1739
1740 __ restore_bcp();
1741 __ restore_locals();
1742 __ empty_expression_stack();
1743 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1744
1745 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1746 NOT_LP64(__ get_thread(thread));
1747 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1748 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1749
1750 // Clear the earlyret state
1751 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1752
1753 __ remove_activation(state, rsi,
1754 false, /* throw_monitor_exception */
1755 false, /* install_monitor_exception */
1756 true); /* notify_jvmdi */
1757 __ jmp(rsi);
1758
1759 return entry;
1760 } // end of ForceEarlyReturn support
1761
1762
1763 //-----------------------------------------------------------------------------
1764 // Helper for vtos entry point generation
1765
1766 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1767 address& bep,
1768 address& cep,
1769 address& sep,
1770 address& aep,
1771 address& iep,
1772 address& lep,
1773 address& fep,
1774 address& dep,
1775 address& vep) {
1776 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1777 Label L;
1778 aep = __ pc(); __ push_ptr(); __ jmp(L);
1779 #ifndef _LP64
1780 fep = __ pc(); __ push(ftos); __ jmp(L);
1781 dep = __ pc(); __ push(dtos); __ jmp(L);
1782 #else
1783 fep = __ pc(); __ push_f(xmm0); __ jmp(L);
1784 dep = __ pc(); __ push_d(xmm0); __ jmp(L);
1785 #endif // _LP64
1786 lep = __ pc(); __ push_l(); __ jmp(L);
1787 bep = cep = sep =
1788 iep = __ pc(); __ push_i();
1789 vep = __ pc();
1790 __ bind(L);
1791 generate_and_dispatch(t);
1792 }
1793
1794 //-----------------------------------------------------------------------------
1795
1796 // Non-product code
1797 #ifndef PRODUCT
1798
1799 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1800 address entry = __ pc();
1801
1802 #ifndef _LP64
1803 // prepare expression stack
1804 __ pop(rcx); // pop return address so expression stack is 'pure'
1805 __ push(state); // save tosca
1806
1807 // pass tosca registers as arguments & call tracer
1808 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1809 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1810 __ pop(state); // restore tosca
1811
1812 // return
1813 __ jmp(rcx);
1814 #else
1815 __ push(state);
1816 __ push(c_rarg0);
1817 __ push(c_rarg1);
1818 __ push(c_rarg2);
1819 __ push(c_rarg3);
1820 __ mov(c_rarg2, rax); // Pass itos
1821 #ifdef _WIN64
1822 __ movflt(xmm3, xmm0); // Pass ftos
1823 #endif
1824 __ call_VM(noreg,
1825 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1826 c_rarg1, c_rarg2, c_rarg3);
1827 __ pop(c_rarg3);
1828 __ pop(c_rarg2);
1829 __ pop(c_rarg1);
1830 __ pop(c_rarg0);
1831 __ pop(state);
1832 __ ret(0); // return from result handler
1833 #endif // _LP64
1834
1835 return entry;
1836 }
1837
1838 void TemplateInterpreterGenerator::count_bytecode() {
1839 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1840 }
1841
1842 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1843 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1844 }
1845
1846 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1847 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1848 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1849 __ orl(rbx,
1850 ((int) t->bytecode()) <<
1851 BytecodePairHistogram::log2_number_of_codes);
1852 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1853 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1854 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1855 }
1856
1857
1858 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1859 // Call a little run-time stub to avoid blow-up for each bytecode.
1860 // The run-time runtime saves the right registers, depending on
1861 // the tosca in-state for the given template.
1862
1863 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1864 "entry must have been generated");
1865 #ifndef _LP64
1866 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1867 #else
1868 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1869 __ andptr(rsp, -16); // align stack as required by ABI
1870 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1871 __ mov(rsp, r12); // restore sp
1872 __ reinit_heapbase();
1873 #endif // _LP64
1874 }
1875
1876
1877 void TemplateInterpreterGenerator::stop_interpreter_at() {
1878 Label L;
1879 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1880 StopInterpreterAt);
1881 __ jcc(Assembler::notEqual, L);
1882 __ int3();
1883 __ bind(L);
1884 }
1885 #endif // !PRODUCT