1 /*
2 * Copyright (c) 2003, 2017, 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 "gc/shared/barrierSetCodeGen.hpp"
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/interp_masm.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/templateInterpreterGenerator.hpp"
33 #include "interpreter/templateTable.hpp"
34 #include "oops/arrayOop.hpp"
35 #include "oops/methodData.hpp"
36 #include "oops/method.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiThreadState.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/deoptimization.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/stubRoutines.hpp"
45 #include "runtime/synchronizer.hpp"
46 #include "runtime/timer.hpp"
47 #include "runtime/vframeArray.hpp"
48 #include "utilities/debug.hpp"
49 #include "utilities/macros.hpp"
50
51 #define __ _masm->
52
53 // Size of interpreter code. Increase if too small. Interpreter will
54 // fail with a guarantee ("not enough space for interpreter generation");
55 // if too small.
56 // Run with +PrintInterpreter to get the VM to print out the size.
57 // Max size with JVMTI
58 #ifdef AMD64
59 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(268) NOT_JVMCI(256) * 1024;
60 #else
61 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
62 #endif // AMD64
63
64 // Global Register Names
65 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
66 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
67
68 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
69 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
70 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
71
72
73 //-----------------------------------------------------------------------------
74
75 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
76 address entry = __ pc();
77
78 #ifdef ASSERT
79 {
80 Label L;
81 __ lea(rax, Address(rbp,
82 frame::interpreter_frame_monitor_block_top_offset *
83 wordSize));
84 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
85 // grows negative)
86 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
87 __ stop ("interpreter frame not set up");
88 __ bind(L);
89 }
90 #endif // ASSERT
91 // Restore bcp under the assumption that the current frame is still
92 // interpreted
93 __ restore_bcp();
94
95 // expression stack must be empty before entering the VM if an
96 // exception happened
97 __ empty_expression_stack();
98 // throw exception
99 __ call_VM(noreg,
100 CAST_FROM_FN_PTR(address,
101 InterpreterRuntime::throw_StackOverflowError));
102 return entry;
103 }
104
105 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
106 const char* name) {
107 address entry = __ pc();
108 // expression stack must be empty before entering the VM if an
109 // exception happened
110 __ empty_expression_stack();
111 // setup parameters
112 // ??? convention: expect aberrant index in register ebx
113 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
114 __ lea(rarg, ExternalAddress((address)name));
115 __ call_VM(noreg,
116 CAST_FROM_FN_PTR(address,
117 InterpreterRuntime::
118 throw_ArrayIndexOutOfBoundsException),
119 rarg, rbx);
120 return entry;
121 }
122
123 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
124 address entry = __ pc();
125
126 // object is at TOS
127 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
128 __ pop(rarg);
129
130 // expression stack must be empty before entering the VM if an
131 // exception happened
132 __ empty_expression_stack();
133
134 __ call_VM(noreg,
135 CAST_FROM_FN_PTR(address,
136 InterpreterRuntime::
137 throw_ClassCastException),
138 rarg);
139 return entry;
140 }
141
142 address TemplateInterpreterGenerator::generate_exception_handler_common(
143 const char* name, const char* message, bool pass_oop) {
144 assert(!pass_oop || message == NULL, "either oop or message but not both");
145 address entry = __ pc();
146
147 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
148 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
149
150 if (pass_oop) {
151 // object is at TOS
152 __ pop(rarg2);
153 }
154 // expression stack must be empty before entering the VM if an
155 // exception happened
156 __ empty_expression_stack();
157 // setup parameters
158 __ lea(rarg, ExternalAddress((address)name));
159 if (pass_oop) {
160 __ call_VM(rax, CAST_FROM_FN_PTR(address,
161 InterpreterRuntime::
162 create_klass_exception),
163 rarg, rarg2);
164 } else {
165 __ lea(rarg2, ExternalAddress((address)message));
166 __ call_VM(rax,
167 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
168 rarg, rarg2);
169 }
170 // throw exception
171 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
172 return entry;
173 }
174
175 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
176 address entry = __ pc();
177
178 #ifndef _LP64
179 #ifdef COMPILER2
180 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
181 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
182 for (int i = 1; i < 8; i++) {
183 __ ffree(i);
184 }
185 } else if (UseSSE < 2) {
186 __ empty_FPU_stack();
187 }
188 #endif // COMPILER2
189 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
190 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
191 } else {
192 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
193 }
194
195 if (state == ftos) {
196 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
197 } else if (state == dtos) {
198 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
199 }
200 #endif // _LP64
201
202 // Restore stack bottom in case i2c adjusted stack
203 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
204 // and NULL it as marker that esp is now tos until next java call
205 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
206
207 __ restore_bcp();
208 __ restore_locals();
209
210 if (state == atos) {
211 Register mdp = rbx;
212 Register tmp = rcx;
213 __ profile_return_type(mdp, rax, tmp);
214 }
215
216 const Register cache = rbx;
217 const Register index = rcx;
218 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
219
220 const Register flags = cache;
221 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
222 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
223 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
224
225 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
226 if (JvmtiExport::can_pop_frame()) {
227 NOT_LP64(__ get_thread(java_thread));
228 __ check_and_handle_popframe(java_thread);
229 }
230 if (JvmtiExport::can_force_early_return()) {
231 NOT_LP64(__ get_thread(java_thread));
232 __ check_and_handle_earlyret(java_thread);
233 }
234
235 __ dispatch_next(state, step);
236
237 return entry;
238 }
239
240
241 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
242 address entry = __ pc();
243
244 #ifndef _LP64
245 if (state == ftos) {
246 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
247 } else if (state == dtos) {
248 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
249 }
250 #endif // _LP64
251
252 // NULL last_sp until next java call
253 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
254 __ restore_bcp();
255 __ restore_locals();
256 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
257 NOT_LP64(__ get_thread(thread));
258 #if INCLUDE_JVMCI
259 // Check if we need to take lock at entry of synchronized method. This can
260 // only occur on method entry so emit it only for vtos with step 0.
261 if ((UseJVMCICompiler || UseAOT) && state == vtos && step == 0) {
262 Label L;
263 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
264 __ jcc(Assembler::zero, L);
265 // Clear flag.
266 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
267 // Satisfy calling convention for lock_method().
268 __ get_method(rbx);
269 // Take lock.
270 lock_method();
271 __ bind(L);
272 } else {
273 #ifdef ASSERT
274 if (UseJVMCICompiler) {
275 Label L;
276 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
277 __ jccb(Assembler::zero, L);
278 __ stop("unexpected pending monitor in deopt entry");
279 __ bind(L);
280 }
281 #endif
282 }
283 #endif
284 // handle exceptions
285 {
286 Label L;
287 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
288 __ jcc(Assembler::zero, L);
289 __ call_VM(noreg,
290 CAST_FROM_FN_PTR(address,
291 InterpreterRuntime::throw_pending_exception));
292 __ should_not_reach_here();
293 __ bind(L);
294 }
295 __ dispatch_next(state, step);
296 return entry;
297 }
298
299 address TemplateInterpreterGenerator::generate_result_handler_for(
300 BasicType type) {
301 address entry = __ pc();
302 switch (type) {
303 case T_BOOLEAN: __ c2bool(rax); break;
304 #ifndef _LP64
305 case T_CHAR : __ andptr(rax, 0xFFFF); break;
306 #else
307 case T_CHAR : __ movzwl(rax, rax); break;
308 #endif // _LP64
309 case T_BYTE : __ sign_extend_byte(rax); break;
310 case T_SHORT : __ sign_extend_short(rax); break;
311 case T_INT : /* nothing to do */ break;
312 case T_LONG : /* nothing to do */ break;
313 case T_VOID : /* nothing to do */ break;
314 #ifndef _LP64
315 case T_DOUBLE :
316 case T_FLOAT :
317 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
318 __ pop(t); // remove return address first
319 // Must return a result for interpreter or compiler. In SSE
320 // mode, results are returned in xmm0 and the FPU stack must
321 // be empty.
322 if (type == T_FLOAT && UseSSE >= 1) {
323 // Load ST0
324 __ fld_d(Address(rsp, 0));
325 // Store as float and empty fpu stack
326 __ fstp_s(Address(rsp, 0));
327 // and reload
328 __ movflt(xmm0, Address(rsp, 0));
329 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
330 __ movdbl(xmm0, Address(rsp, 0));
331 } else {
332 // restore ST0
333 __ fld_d(Address(rsp, 0));
334 }
335 // and pop the temp
336 __ addptr(rsp, 2 * wordSize);
337 __ push(t); // restore return address
338 }
339 break;
340 #else
341 case T_FLOAT : /* nothing to do */ break;
342 case T_DOUBLE : /* nothing to do */ break;
343 #endif // _LP64
344
345 case T_OBJECT :
346 // retrieve result from frame
347 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
348 // and verify it
349 __ verify_oop(rax);
350 break;
351 default : ShouldNotReachHere();
352 }
353 __ ret(0); // return from result handler
354 return entry;
355 }
356
357 address TemplateInterpreterGenerator::generate_safept_entry_for(
358 TosState state,
359 address runtime_entry) {
360 address entry = __ pc();
361 __ push(state);
362 __ call_VM(noreg, runtime_entry);
363 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
364 return entry;
365 }
366
367
368
369 // Helpers for commoning out cases in the various type of method entries.
370 //
371
372
373 // increment invocation count & check for overflow
374 //
375 // Note: checking for negative value instead of overflow
376 // so we have a 'sticky' overflow test
377 //
378 // rbx: method
379 // rcx: invocation counter
380 //
381 void TemplateInterpreterGenerator::generate_counter_incr(
382 Label* overflow,
383 Label* profile_method,
384 Label* profile_method_continue) {
385 Label done;
386 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
387 if (TieredCompilation) {
388 int increment = InvocationCounter::count_increment;
389 Label no_mdo;
390 if (ProfileInterpreter) {
391 // Are we profiling?
392 __ movptr(rax, Address(rbx, Method::method_data_offset()));
393 __ testptr(rax, rax);
394 __ jccb(Assembler::zero, no_mdo);
395 // Increment counter in the MDO
396 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
397 in_bytes(InvocationCounter::counter_offset()));
398 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
399 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
400 __ jmp(done);
401 }
402 __ bind(no_mdo);
403 // Increment counter in MethodCounters
404 const Address invocation_counter(rax,
405 MethodCounters::invocation_counter_offset() +
406 InvocationCounter::counter_offset());
407 __ get_method_counters(rbx, rax, done);
408 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
409 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
410 false, Assembler::zero, overflow);
411 __ bind(done);
412 } else { // not TieredCompilation
413 const Address backedge_counter(rax,
414 MethodCounters::backedge_counter_offset() +
415 InvocationCounter::counter_offset());
416 const Address invocation_counter(rax,
417 MethodCounters::invocation_counter_offset() +
418 InvocationCounter::counter_offset());
419
420 __ get_method_counters(rbx, rax, done);
421
422 if (ProfileInterpreter) {
423 __ incrementl(Address(rax,
424 MethodCounters::interpreter_invocation_counter_offset()));
425 }
426 // Update standard invocation counters
427 __ movl(rcx, invocation_counter);
428 __ incrementl(rcx, InvocationCounter::count_increment);
429 __ movl(invocation_counter, rcx); // save invocation count
430
431 __ movl(rax, backedge_counter); // load backedge counter
432 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
433
434 __ addl(rcx, rax); // add both counters
435
436 // profile_method is non-null only for interpreted method so
437 // profile_method != NULL == !native_call
438
439 if (ProfileInterpreter && profile_method != NULL) {
440 // Test to see if we should create a method data oop
441 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
442 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
443 __ jcc(Assembler::less, *profile_method_continue);
444
445 // if no method data exists, go to profile_method
446 __ test_method_data_pointer(rax, *profile_method);
447 }
448
449 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
450 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
451 __ jcc(Assembler::aboveEqual, *overflow);
452 __ bind(done);
453 }
454 }
455
456 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
457
458 // Asm interpreter on entry
459 // r14/rdi - locals
460 // r13/rsi - bcp
461 // rbx - method
462 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
463 // rbp - interpreter frame
464
465 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
466 // Everything as it was on entry
467 // rdx is not restored. Doesn't appear to really be set.
468
469 // InterpreterRuntime::frequency_counter_overflow takes two
470 // arguments, the first (thread) is passed by call_VM, the second
471 // indicates if the counter overflow occurs at a backwards branch
472 // (NULL bcp). We pass zero for it. The call returns the address
473 // of the verified entry point for the method or NULL if the
474 // compilation did not complete (either went background or bailed
475 // out).
476 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
477 __ movl(rarg, 0);
478 __ call_VM(noreg,
479 CAST_FROM_FN_PTR(address,
480 InterpreterRuntime::frequency_counter_overflow),
481 rarg);
482
483 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
484 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
485 // and jump to the interpreted entry.
486 __ jmp(do_continue, relocInfo::none);
487 }
488
489 // See if we've got enough room on the stack for locals plus overhead below
490 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
491 // without going through the signal handler, i.e., reserved and yellow zones
492 // will not be made usable. The shadow zone must suffice to handle the
493 // overflow.
494 // The expression stack grows down incrementally, so the normal guard
495 // page mechanism will work for that.
496 //
497 // NOTE: Since the additional locals are also always pushed (wasn't
498 // obvious in generate_fixed_frame) so the guard should work for them
499 // too.
500 //
501 // Args:
502 // rdx: number of additional locals this frame needs (what we must check)
503 // rbx: Method*
504 //
505 // Kills:
506 // rax
507 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
508
509 // monitor entry size: see picture of stack in frame_x86.hpp
510 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
511
512 // total overhead size: entry_size + (saved rbp through expr stack
513 // bottom). be sure to change this if you add/subtract anything
514 // to/from the overhead area
515 const int overhead_size =
516 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
517
518 const int page_size = os::vm_page_size();
519
520 Label after_frame_check;
521
522 // see if the frame is greater than one page in size. If so,
523 // then we need to verify there is enough stack space remaining
524 // for the additional locals.
525 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
526 __ jcc(Assembler::belowEqual, after_frame_check);
527
528 // compute rsp as if this were going to be the last frame on
529 // the stack before the red zone
530
531 Label after_frame_check_pop;
532 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
533 #ifndef _LP64
534 __ push(thread);
535 __ get_thread(thread);
536 #endif
537
538 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
539
540 // locals + overhead, in bytes
541 __ mov(rax, rdx);
542 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
543 __ addptr(rax, overhead_size);
544
545 #ifdef ASSERT
546 Label limit_okay;
547 // Verify that thread stack overflow limit is non-zero.
548 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
549 __ jcc(Assembler::notEqual, limit_okay);
550 __ stop("stack overflow limit is zero");
551 __ bind(limit_okay);
552 #endif
553
554 // Add locals/frame size to stack limit.
555 __ addptr(rax, stack_limit);
556
557 // Check against the current stack bottom.
558 __ cmpptr(rsp, rax);
559
560 __ jcc(Assembler::above, after_frame_check_pop);
561 NOT_LP64(__ pop(rsi)); // get saved bcp
562
563 // Restore sender's sp as SP. This is necessary if the sender's
564 // frame is an extended compiled frame (see gen_c2i_adapter())
565 // and safer anyway in case of JSR292 adaptations.
566
567 __ pop(rax); // return address must be moved if SP is changed
568 __ mov(rsp, rbcp);
569 __ push(rax);
570
571 // Note: the restored frame is not necessarily interpreted.
572 // Use the shared runtime version of the StackOverflowError.
573 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
574 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
575 // all done with frame size check
576 __ bind(after_frame_check_pop);
577 NOT_LP64(__ pop(rsi));
578
579 // all done with frame size check
580 __ bind(after_frame_check);
581 }
582
583 // Allocate monitor and lock method (asm interpreter)
584 //
585 // Args:
586 // rbx: Method*
587 // r14/rdi: locals
588 //
589 // Kills:
590 // rax
591 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
592 // rscratch1, rscratch2 (scratch regs)
593 void TemplateInterpreterGenerator::lock_method() {
594 // synchronize method
595 const Address access_flags(rbx, Method::access_flags_offset());
596 const Address monitor_block_top(
597 rbp,
598 frame::interpreter_frame_monitor_block_top_offset * wordSize);
599 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
600
601 #ifdef ASSERT
602 {
603 Label L;
604 __ movl(rax, access_flags);
605 __ testl(rax, JVM_ACC_SYNCHRONIZED);
606 __ jcc(Assembler::notZero, L);
607 __ stop("method doesn't need synchronization");
608 __ bind(L);
609 }
610 #endif // ASSERT
611
612 // get synchronization object
613 {
614 Label done;
615 __ movl(rax, access_flags);
616 __ testl(rax, JVM_ACC_STATIC);
617 // get receiver (assume this is frequent case)
618 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
619 __ jcc(Assembler::zero, done);
620 __ load_mirror(rax, rbx);
621
622 #ifdef ASSERT
623 {
624 Label L;
625 __ testptr(rax, rax);
626 __ jcc(Assembler::notZero, L);
627 __ stop("synchronization object is NULL");
628 __ bind(L);
629 }
630 #endif // ASSERT
631
632 __ bind(done);
633 }
634
635 // add space for monitor & lock
636 __ subptr(rsp, entry_size); // add space for a monitor entry
637 __ movptr(monitor_block_top, rsp); // set new monitor block top
638 // store object
639 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
640 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
641 __ movptr(lockreg, rsp); // object address
642 __ lock_object(lockreg);
643 }
644
645 // Generate a fixed interpreter frame. This is identical setup for
646 // interpreted methods and for native methods hence the shared code.
647 //
648 // Args:
649 // rax: return address
650 // rbx: Method*
651 // r14/rdi: pointer to locals
652 // r13/rsi: sender sp
653 // rdx: cp cache
654 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
655 // initialize fixed part of activation frame
656 __ push(rax); // save return address
657 __ enter(); // save old & set new rbp
658 __ push(rbcp); // set sender sp
659 __ push((int)NULL_WORD); // leave last_sp as null
660 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
661 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
662 __ push(rbx); // save Method*
663 // Get mirror and store it in the frame as GC root for this Method*
664 __ load_mirror(rdx, rbx);
665 __ push(rdx);
666 if (ProfileInterpreter) {
667 Label method_data_continue;
668 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
669 __ testptr(rdx, rdx);
670 __ jcc(Assembler::zero, method_data_continue);
671 __ addptr(rdx, in_bytes(MethodData::data_offset()));
672 __ bind(method_data_continue);
673 __ push(rdx); // set the mdp (method data pointer)
674 } else {
675 __ push(0);
676 }
677
678 __ movptr(rdx, Address(rbx, Method::const_offset()));
679 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
680 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
681 __ push(rdx); // set constant pool cache
682 __ push(rlocals); // set locals pointer
683 if (native_call) {
684 __ push(0); // no bcp
685 } else {
686 __ push(rbcp); // set bcp
687 }
688 __ push(0); // reserve word for pointer to expression stack bottom
689 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
690 }
691
692 // End of helpers
693
694 // Method entry for java.lang.ref.Reference.get.
695 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
696 // Code: _aload_0, _getfield, _areturn
697 // parameter size = 1
698 //
699 // The code that gets generated by this routine is split into 2 parts:
700 // 1. The "intrinsified" code for G1 (or any SATB based GC),
701 // 2. The slow path - which is an expansion of the regular method entry.
702 //
703 // Notes:-
704 // * In the G1 code we do not check whether we need to block for
705 // a safepoint. If G1 is enabled then we must execute the specialized
706 // code for Reference.get (except when the Reference object is null)
707 // so that we can log the value in the referent field with an SATB
708 // update buffer.
709 // If the code for the getfield template is modified so that the
710 // G1 pre-barrier code is executed when the current method is
711 // Reference.get() then going through the normal method entry
712 // will be fine.
713 // * The G1 code can, however, check the receiver object (the instance
714 // of java.lang.Reference) and jump to the slow path if null. If the
715 // Reference object is null then we obviously cannot fetch the referent
716 // and so we don't need to call the G1 pre-barrier. Thus we can use the
717 // regular method entry code to generate the NPE.
718 //
719 // rbx: Method*
720
721 // r13: senderSP must preserve for slow path, set SP to it on fast path
722
723 address entry = __ pc();
724
725 const int referent_offset = java_lang_ref_Reference::referent_offset;
726 guarantee(referent_offset > 0, "referent offset not initialized");
727
728 Label slow_path;
729 // rbx: method
730
731 // Check if local 0 != NULL
732 // If the receiver is null then it is OK to jump to the slow path.
733 __ movptr(rax, Address(rsp, wordSize));
734
735 __ testptr(rax, rax);
736 __ jcc(Assembler::zero, slow_path);
737
738 // rax: local 0
739 // rbx: method (but can be used as scratch now)
740 // rdx: scratch
741 // rdi: scratch
742
743 // Preserve the sender sp in case the pre-barrier
744 // calls the runtime
745 NOT_LP64(__ push(rsi));
746
747 // Load the value of the referent field.
748 const Address field_address(rax, referent_offset);
749 BarrierSetCodeGen *code_gen = Universe::heap()->barrier_set()->code_gen();
750 code_gen->load_at(_masm, ACCESS_ON_HEAP | GC_ACCESS_ON_WEAK, T_OBJECT, rax, field_address, /*tmp1*/ rbx, /*tmp2*/ rdx);
751
752 // _areturn
753 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
754 NOT_LP64(__ pop(rsi)); // get sender sp
755 __ pop(rdi); // get return address
756 __ mov(rsp, sender_sp); // set sp to sender sp
757 __ jmp(rdi);
758 __ ret(0);
759
760 // generate a vanilla interpreter entry as the slow path
761 __ bind(slow_path);
762 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
763 return entry;
764 }
765
766 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
767 // Quick & dirty stack overflow checking: bang the stack & handle trap.
768 // Note that we do the banging after the frame is setup, since the exception
769 // handling code expects to find a valid interpreter frame on the stack.
770 // Doing the banging earlier fails if the caller frame is not an interpreter
771 // frame.
772 // (Also, the exception throwing code expects to unlock any synchronized
773 // method receiever, so do the banging after locking the receiver.)
774
775 // Bang each page in the shadow zone. We can't assume it's been done for
776 // an interpreter frame with greater than a page of locals, so each page
777 // needs to be checked. Only true for non-native.
778 if (UseStackBanging) {
779 const int page_size = os::vm_page_size();
780 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size;
781 const int start_page = native_call ? n_shadow_pages : 1;
782 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
783 __ bang_stack_with_offset(pages*page_size);
784 }
785 }
786 }
787
788 // Interpreter stub for calling a native method. (asm interpreter)
789 // This sets up a somewhat different looking stack for calling the
790 // native method than the typical interpreter frame setup.
791 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
792 // determine code generation flags
793 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
794
795 // rbx: Method*
796 // rbcp: sender sp
797
798 address entry_point = __ pc();
799
800 const Address constMethod (rbx, Method::const_offset());
801 const Address access_flags (rbx, Method::access_flags_offset());
802 const Address size_of_parameters(rcx, ConstMethod::
803 size_of_parameters_offset());
804
805
806 // get parameter size (always needed)
807 __ movptr(rcx, constMethod);
808 __ load_unsigned_short(rcx, size_of_parameters);
809
810 // native calls don't need the stack size check since they have no
811 // expression stack and the arguments are already on the stack and
812 // we only add a handful of words to the stack
813
814 // rbx: Method*
815 // rcx: size of parameters
816 // rbcp: sender sp
817 __ pop(rax); // get return address
818
819 // for natives the size of locals is zero
820
821 // compute beginning of parameters
822 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
823
824 // add 2 zero-initialized slots for native calls
825 // initialize result_handler slot
826 __ push((int) NULL_WORD);
827 // slot for oop temp
828 // (static native method holder mirror/jni oop result)
829 __ push((int) NULL_WORD);
830
831 // initialize fixed part of activation frame
832 generate_fixed_frame(true);
833
834 // make sure method is native & not abstract
835 #ifdef ASSERT
836 __ movl(rax, access_flags);
837 {
838 Label L;
839 __ testl(rax, JVM_ACC_NATIVE);
840 __ jcc(Assembler::notZero, L);
841 __ stop("tried to execute non-native method as native");
842 __ bind(L);
843 }
844 {
845 Label L;
846 __ testl(rax, JVM_ACC_ABSTRACT);
847 __ jcc(Assembler::zero, L);
848 __ stop("tried to execute abstract method in interpreter");
849 __ bind(L);
850 }
851 #endif
852
853 // Since at this point in the method invocation the exception handler
854 // would try to exit the monitor of synchronized methods which hasn't
855 // been entered yet, we set the thread local variable
856 // _do_not_unlock_if_synchronized to true. The remove_activation will
857 // check this flag.
858
859 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
860 NOT_LP64(__ get_thread(thread1));
861 const Address do_not_unlock_if_synchronized(thread1,
862 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
863 __ movbool(do_not_unlock_if_synchronized, true);
864
865 // increment invocation count & check for overflow
866 Label invocation_counter_overflow;
867 if (inc_counter) {
868 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
869 }
870
871 Label continue_after_compile;
872 __ bind(continue_after_compile);
873
874 bang_stack_shadow_pages(true);
875
876 // reset the _do_not_unlock_if_synchronized flag
877 NOT_LP64(__ get_thread(thread1));
878 __ movbool(do_not_unlock_if_synchronized, false);
879
880 // check for synchronized methods
881 // Must happen AFTER invocation_counter check and stack overflow check,
882 // so method is not locked if overflows.
883 if (synchronized) {
884 lock_method();
885 } else {
886 // no synchronization necessary
887 #ifdef ASSERT
888 {
889 Label L;
890 __ movl(rax, access_flags);
891 __ testl(rax, JVM_ACC_SYNCHRONIZED);
892 __ jcc(Assembler::zero, L);
893 __ stop("method needs synchronization");
894 __ bind(L);
895 }
896 #endif
897 }
898
899 // start execution
900 #ifdef ASSERT
901 {
902 Label L;
903 const Address monitor_block_top(rbp,
904 frame::interpreter_frame_monitor_block_top_offset * wordSize);
905 __ movptr(rax, monitor_block_top);
906 __ cmpptr(rax, rsp);
907 __ jcc(Assembler::equal, L);
908 __ stop("broken stack frame setup in interpreter");
909 __ bind(L);
910 }
911 #endif
912
913 // jvmti support
914 __ notify_method_entry();
915
916 // work registers
917 const Register method = rbx;
918 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
919 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
920
921 // allocate space for parameters
922 __ get_method(method);
923 __ movptr(t, Address(method, Method::const_offset()));
924 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
925
926 #ifndef _LP64
927 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
928 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
929 __ subptr(rsp, t);
930 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
931 #else
932 __ shll(t, Interpreter::logStackElementSize);
933
934 __ subptr(rsp, t);
935 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
936 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
937 #endif // _LP64
938
939 // get signature handler
940 {
941 Label L;
942 __ movptr(t, Address(method, Method::signature_handler_offset()));
943 __ testptr(t, t);
944 __ jcc(Assembler::notZero, L);
945 __ call_VM(noreg,
946 CAST_FROM_FN_PTR(address,
947 InterpreterRuntime::prepare_native_call),
948 method);
949 __ get_method(method);
950 __ movptr(t, Address(method, Method::signature_handler_offset()));
951 __ bind(L);
952 }
953
954 // call signature handler
955 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
956 "adjust this code");
957 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
958 "adjust this code");
959 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
960 "adjust this code");
961
962 // The generated handlers do not touch RBX (the method oop).
963 // However, large signatures cannot be cached and are generated
964 // each time here. The slow-path generator can do a GC on return,
965 // so we must reload it after the call.
966 __ call(t);
967 __ get_method(method); // slow path can do a GC, reload RBX
968
969
970 // result handler is in rax
971 // set result handler
972 __ movptr(Address(rbp,
973 (frame::interpreter_frame_result_handler_offset) * wordSize),
974 rax);
975
976 // pass mirror handle if static call
977 {
978 Label L;
979 __ movl(t, Address(method, Method::access_flags_offset()));
980 __ testl(t, JVM_ACC_STATIC);
981 __ jcc(Assembler::zero, L);
982 // get mirror
983 __ load_mirror(t, method);
984 // copy mirror into activation frame
985 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
986 t);
987 // pass handle to mirror
988 #ifndef _LP64
989 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
990 __ movptr(Address(rsp, wordSize), t);
991 #else
992 __ lea(c_rarg1,
993 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
994 #endif // _LP64
995 __ bind(L);
996 }
997
998 // get native function entry point
999 {
1000 Label L;
1001 __ movptr(rax, Address(method, Method::native_function_offset()));
1002 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1003 __ cmpptr(rax, unsatisfied.addr());
1004 __ jcc(Assembler::notEqual, L);
1005 __ call_VM(noreg,
1006 CAST_FROM_FN_PTR(address,
1007 InterpreterRuntime::prepare_native_call),
1008 method);
1009 __ get_method(method);
1010 __ movptr(rax, Address(method, Method::native_function_offset()));
1011 __ bind(L);
1012 }
1013
1014 // pass JNIEnv
1015 #ifndef _LP64
1016 __ get_thread(thread);
1017 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1018 __ movptr(Address(rsp, 0), t);
1019
1020 // set_last_Java_frame_before_call
1021 // It is enough that the pc()
1022 // points into the right code segment. It does not have to be the correct return pc.
1023 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1024 #else
1025 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1026
1027 // It is enough that the pc() points into the right code
1028 // segment. It does not have to be the correct return pc.
1029 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1030 #endif // _LP64
1031
1032 // change thread state
1033 #ifdef ASSERT
1034 {
1035 Label L;
1036 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1037 __ cmpl(t, _thread_in_Java);
1038 __ jcc(Assembler::equal, L);
1039 __ stop("Wrong thread state in native stub");
1040 __ bind(L);
1041 }
1042 #endif
1043
1044 // Change state to native
1045
1046 __ movl(Address(thread, JavaThread::thread_state_offset()),
1047 _thread_in_native);
1048
1049 // Call the native method.
1050 __ call(rax);
1051 // 32: result potentially in rdx:rax or ST0
1052 // 64: result potentially in rax or xmm0
1053
1054 // Verify or restore cpu control state after JNI call
1055 __ restore_cpu_control_state_after_jni();
1056
1057 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1058 // in order to extract the result of a method call. If the order of these
1059 // pushes change or anything else is added to the stack then the code in
1060 // interpreter_frame_result must also change.
1061
1062 #ifndef _LP64
1063 // save potential result in ST(0) & rdx:rax
1064 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1065 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1066 // It is safe to do this push because state is _thread_in_native and return address will be found
1067 // via _last_native_pc and not via _last_jave_sp
1068
1069 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1070 // If the order changes or anything else is added to the stack the code in
1071 // interpreter_frame_result will have to be changed.
1072
1073 { Label L;
1074 Label push_double;
1075 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1076 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1077 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1078 float_handler.addr());
1079 __ jcc(Assembler::equal, push_double);
1080 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1081 double_handler.addr());
1082 __ jcc(Assembler::notEqual, L);
1083 __ bind(push_double);
1084 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1085 __ bind(L);
1086 }
1087 #else
1088 __ push(dtos);
1089 #endif // _LP64
1090
1091 __ push(ltos);
1092
1093 // change thread state
1094 NOT_LP64(__ get_thread(thread));
1095 __ movl(Address(thread, JavaThread::thread_state_offset()),
1096 _thread_in_native_trans);
1097
1098 if (os::is_MP()) {
1099 if (UseMembar) {
1100 // Force this write out before the read below
1101 __ membar(Assembler::Membar_mask_bits(
1102 Assembler::LoadLoad | Assembler::LoadStore |
1103 Assembler::StoreLoad | Assembler::StoreStore));
1104 } else {
1105 // Write serialization page so VM thread can do a pseudo remote membar.
1106 // We use the current thread pointer to calculate a thread specific
1107 // offset to write to within the page. This minimizes bus traffic
1108 // due to cache line collision.
1109 __ serialize_memory(thread, rcx);
1110 }
1111 }
1112
1113 #ifndef _LP64
1114 if (AlwaysRestoreFPU) {
1115 // Make sure the control word is correct.
1116 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1117 }
1118 #endif // _LP64
1119
1120 // check for safepoint operation in progress and/or pending suspend requests
1121 {
1122 Label Continue;
1123 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1124 SafepointSynchronize::_not_synchronized);
1125
1126 Label L;
1127 __ jcc(Assembler::notEqual, L);
1128 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1129 __ jcc(Assembler::equal, Continue);
1130 __ bind(L);
1131
1132 // Don't use call_VM as it will see a possible pending exception
1133 // and forward it and never return here preventing us from
1134 // clearing _last_native_pc down below. Also can't use
1135 // call_VM_leaf either as it will check to see if r13 & r14 are
1136 // preserved and correspond to the bcp/locals pointers. So we do a
1137 // runtime call by hand.
1138 //
1139 #ifndef _LP64
1140 __ push(thread);
1141 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1142 JavaThread::check_special_condition_for_native_trans)));
1143 __ increment(rsp, wordSize);
1144 __ get_thread(thread);
1145 #else
1146 __ mov(c_rarg0, r15_thread);
1147 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1148 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1149 __ andptr(rsp, -16); // align stack as required by ABI
1150 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1151 __ mov(rsp, r12); // restore sp
1152 __ reinit_heapbase();
1153 #endif // _LP64
1154 __ bind(Continue);
1155 }
1156
1157 // change thread state
1158 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1159
1160 // reset_last_Java_frame
1161 __ reset_last_Java_frame(thread, true);
1162
1163 if (CheckJNICalls) {
1164 // clear_pending_jni_exception_check
1165 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1166 }
1167
1168 // reset handle block
1169 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1170 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1171
1172 // If result is an oop unbox and store it in frame where gc will see it
1173 // and result handler will pick it up
1174
1175 {
1176 Label no_oop, not_weak, store_result;
1177 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1178 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1179 __ jcc(Assembler::notEqual, no_oop);
1180 // retrieve result
1181 __ pop(ltos);
1182 // Unbox oop result, e.g. JNIHandles::resolve value.
1183 __ resolve_jobject(rax /* value */,
1184 thread /* thread */,
1185 t /* tmp */);
1186 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1187 // keep stack depth as expected by pushing oop which will eventually be discarded
1188 __ push(ltos);
1189 __ bind(no_oop);
1190 }
1191
1192
1193 {
1194 Label no_reguard;
1195 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1196 JavaThread::stack_guard_yellow_reserved_disabled);
1197 __ jcc(Assembler::notEqual, no_reguard);
1198
1199 __ pusha(); // XXX only save smashed registers
1200 #ifndef _LP64
1201 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1202 __ popa();
1203 #else
1204 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1205 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1206 __ andptr(rsp, -16); // align stack as required by ABI
1207 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1208 __ mov(rsp, r12); // restore sp
1209 __ popa(); // XXX only restore smashed registers
1210 __ reinit_heapbase();
1211 #endif // _LP64
1212
1213 __ bind(no_reguard);
1214 }
1215
1216
1217 // The method register is junk from after the thread_in_native transition
1218 // until here. Also can't call_VM until the bcp has been
1219 // restored. Need bcp for throwing exception below so get it now.
1220 __ get_method(method);
1221
1222 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1223 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1224 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1225
1226 // handle exceptions (exception handling will handle unlocking!)
1227 {
1228 Label L;
1229 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1230 __ jcc(Assembler::zero, L);
1231 // Note: At some point we may want to unify this with the code
1232 // used in call_VM_base(); i.e., we should use the
1233 // StubRoutines::forward_exception code. For now this doesn't work
1234 // here because the rsp is not correctly set at this point.
1235 __ MacroAssembler::call_VM(noreg,
1236 CAST_FROM_FN_PTR(address,
1237 InterpreterRuntime::throw_pending_exception));
1238 __ should_not_reach_here();
1239 __ bind(L);
1240 }
1241
1242 // do unlocking if necessary
1243 {
1244 Label L;
1245 __ movl(t, Address(method, Method::access_flags_offset()));
1246 __ testl(t, JVM_ACC_SYNCHRONIZED);
1247 __ jcc(Assembler::zero, L);
1248 // the code below should be shared with interpreter macro
1249 // assembler implementation
1250 {
1251 Label unlock;
1252 // BasicObjectLock will be first in list, since this is a
1253 // synchronized method. However, need to check that the object
1254 // has not been unlocked by an explicit monitorexit bytecode.
1255 const Address monitor(rbp,
1256 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1257 wordSize - (int)sizeof(BasicObjectLock)));
1258
1259 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1260
1261 // monitor expect in c_rarg1 for slow unlock path
1262 __ lea(regmon, monitor); // address of first monitor
1263
1264 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1265 __ testptr(t, t);
1266 __ jcc(Assembler::notZero, unlock);
1267
1268 // Entry already unlocked, need to throw exception
1269 __ MacroAssembler::call_VM(noreg,
1270 CAST_FROM_FN_PTR(address,
1271 InterpreterRuntime::throw_illegal_monitor_state_exception));
1272 __ should_not_reach_here();
1273
1274 __ bind(unlock);
1275 __ unlock_object(regmon);
1276 }
1277 __ bind(L);
1278 }
1279
1280 // jvmti support
1281 // Note: This must happen _after_ handling/throwing any exceptions since
1282 // the exception handler code notifies the runtime of method exits
1283 // too. If this happens before, method entry/exit notifications are
1284 // not properly paired (was bug - gri 11/22/99).
1285 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1286
1287 // restore potential result in edx:eax, call result handler to
1288 // restore potential result in ST0 & handle result
1289
1290 __ pop(ltos);
1291 LP64_ONLY( __ pop(dtos));
1292
1293 __ movptr(t, Address(rbp,
1294 (frame::interpreter_frame_result_handler_offset) * wordSize));
1295 __ call(t);
1296
1297 // remove activation
1298 __ movptr(t, Address(rbp,
1299 frame::interpreter_frame_sender_sp_offset *
1300 wordSize)); // get sender sp
1301 __ leave(); // remove frame anchor
1302 __ pop(rdi); // get return address
1303 __ mov(rsp, t); // set sp to sender sp
1304 __ jmp(rdi);
1305
1306 if (inc_counter) {
1307 // Handle overflow of counter and compile method
1308 __ bind(invocation_counter_overflow);
1309 generate_counter_overflow(continue_after_compile);
1310 }
1311
1312 return entry_point;
1313 }
1314
1315 // Abstract method entry
1316 // Attempt to execute abstract method. Throw exception
1317 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1318
1319 address entry_point = __ pc();
1320
1321 // abstract method entry
1322
1323 // pop return address, reset last_sp to NULL
1324 __ empty_expression_stack();
1325 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1326 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1327
1328 // throw exception
1329 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
1330 // the call_VM checks for exception, so we should never return here.
1331 __ should_not_reach_here();
1332
1333 return entry_point;
1334 }
1335
1336 //
1337 // Generic interpreted method entry to (asm) interpreter
1338 //
1339 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1340 // determine code generation flags
1341 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1342
1343 // ebx: Method*
1344 // rbcp: sender sp
1345 address entry_point = __ pc();
1346
1347 const Address constMethod(rbx, Method::const_offset());
1348 const Address access_flags(rbx, Method::access_flags_offset());
1349 const Address size_of_parameters(rdx,
1350 ConstMethod::size_of_parameters_offset());
1351 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1352
1353
1354 // get parameter size (always needed)
1355 __ movptr(rdx, constMethod);
1356 __ load_unsigned_short(rcx, size_of_parameters);
1357
1358 // rbx: Method*
1359 // rcx: size of parameters
1360 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1361
1362 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1363 __ subl(rdx, rcx); // rdx = no. of additional locals
1364
1365 // YYY
1366 // __ incrementl(rdx);
1367 // __ andl(rdx, -2);
1368
1369 // see if we've got enough room on the stack for locals plus overhead.
1370 generate_stack_overflow_check();
1371
1372 // get return address
1373 __ pop(rax);
1374
1375 // compute beginning of parameters
1376 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1377
1378 // rdx - # of additional locals
1379 // allocate space for locals
1380 // explicitly initialize locals
1381 {
1382 Label exit, loop;
1383 __ testl(rdx, rdx);
1384 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1385 __ bind(loop);
1386 __ push((int) NULL_WORD); // initialize local variables
1387 __ decrementl(rdx); // until everything initialized
1388 __ jcc(Assembler::greater, loop);
1389 __ bind(exit);
1390 }
1391
1392 // initialize fixed part of activation frame
1393 generate_fixed_frame(false);
1394
1395 // make sure method is not native & not abstract
1396 #ifdef ASSERT
1397 __ movl(rax, access_flags);
1398 {
1399 Label L;
1400 __ testl(rax, JVM_ACC_NATIVE);
1401 __ jcc(Assembler::zero, L);
1402 __ stop("tried to execute native method as non-native");
1403 __ bind(L);
1404 }
1405 {
1406 Label L;
1407 __ testl(rax, JVM_ACC_ABSTRACT);
1408 __ jcc(Assembler::zero, L);
1409 __ stop("tried to execute abstract method in interpreter");
1410 __ bind(L);
1411 }
1412 #endif
1413
1414 // Since at this point in the method invocation the exception
1415 // handler would try to exit the monitor of synchronized methods
1416 // which hasn't been entered yet, we set the thread local variable
1417 // _do_not_unlock_if_synchronized to true. The remove_activation
1418 // will check this flag.
1419
1420 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1421 NOT_LP64(__ get_thread(thread));
1422 const Address do_not_unlock_if_synchronized(thread,
1423 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1424 __ movbool(do_not_unlock_if_synchronized, true);
1425
1426 __ profile_parameters_type(rax, rcx, rdx);
1427 // increment invocation count & check for overflow
1428 Label invocation_counter_overflow;
1429 Label profile_method;
1430 Label profile_method_continue;
1431 if (inc_counter) {
1432 generate_counter_incr(&invocation_counter_overflow,
1433 &profile_method,
1434 &profile_method_continue);
1435 if (ProfileInterpreter) {
1436 __ bind(profile_method_continue);
1437 }
1438 }
1439
1440 Label continue_after_compile;
1441 __ bind(continue_after_compile);
1442
1443 // check for synchronized interpreted methods
1444 bang_stack_shadow_pages(false);
1445
1446 // reset the _do_not_unlock_if_synchronized flag
1447 NOT_LP64(__ get_thread(thread));
1448 __ movbool(do_not_unlock_if_synchronized, false);
1449
1450 // check for synchronized methods
1451 // Must happen AFTER invocation_counter check and stack overflow check,
1452 // so method is not locked if overflows.
1453 if (synchronized) {
1454 // Allocate monitor and lock method
1455 lock_method();
1456 } else {
1457 // no synchronization necessary
1458 #ifdef ASSERT
1459 {
1460 Label L;
1461 __ movl(rax, access_flags);
1462 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1463 __ jcc(Assembler::zero, L);
1464 __ stop("method needs synchronization");
1465 __ bind(L);
1466 }
1467 #endif
1468 }
1469
1470 // start execution
1471 #ifdef ASSERT
1472 {
1473 Label L;
1474 const Address monitor_block_top (rbp,
1475 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1476 __ movptr(rax, monitor_block_top);
1477 __ cmpptr(rax, rsp);
1478 __ jcc(Assembler::equal, L);
1479 __ stop("broken stack frame setup in interpreter");
1480 __ bind(L);
1481 }
1482 #endif
1483
1484 // jvmti support
1485 __ notify_method_entry();
1486
1487 __ dispatch_next(vtos);
1488
1489 // invocation counter overflow
1490 if (inc_counter) {
1491 if (ProfileInterpreter) {
1492 // We have decided to profile this method in the interpreter
1493 __ bind(profile_method);
1494 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1495 __ set_method_data_pointer_for_bcp();
1496 __ get_method(rbx);
1497 __ jmp(profile_method_continue);
1498 }
1499 // Handle overflow of counter and compile method
1500 __ bind(invocation_counter_overflow);
1501 generate_counter_overflow(continue_after_compile);
1502 }
1503
1504 return entry_point;
1505 }
1506
1507 //-----------------------------------------------------------------------------
1508 // Exceptions
1509
1510 void TemplateInterpreterGenerator::generate_throw_exception() {
1511 // Entry point in previous activation (i.e., if the caller was
1512 // interpreted)
1513 Interpreter::_rethrow_exception_entry = __ pc();
1514 // Restore sp to interpreter_frame_last_sp even though we are going
1515 // to empty the expression stack for the exception processing.
1516 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1517 // rax: exception
1518 // rdx: return address/pc that threw exception
1519 __ restore_bcp(); // r13/rsi points to call/send
1520 __ restore_locals();
1521 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1522 // Entry point for exceptions thrown within interpreter code
1523 Interpreter::_throw_exception_entry = __ pc();
1524 // expression stack is undefined here
1525 // rax: exception
1526 // r13/rsi: exception bcp
1527 __ verify_oop(rax);
1528 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1529 LP64_ONLY(__ mov(c_rarg1, rax));
1530
1531 // expression stack must be empty before entering the VM in case of
1532 // an exception
1533 __ empty_expression_stack();
1534 // find exception handler address and preserve exception oop
1535 __ call_VM(rdx,
1536 CAST_FROM_FN_PTR(address,
1537 InterpreterRuntime::exception_handler_for_exception),
1538 rarg);
1539 // rax: exception handler entry point
1540 // rdx: preserved exception oop
1541 // r13/rsi: bcp for exception handler
1542 __ push_ptr(rdx); // push exception which is now the only value on the stack
1543 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1544
1545 // If the exception is not handled in the current frame the frame is
1546 // removed and the exception is rethrown (i.e. exception
1547 // continuation is _rethrow_exception).
1548 //
1549 // Note: At this point the bci is still the bxi for the instruction
1550 // which caused the exception and the expression stack is
1551 // empty. Thus, for any VM calls at this point, GC will find a legal
1552 // oop map (with empty expression stack).
1553
1554 // In current activation
1555 // tos: exception
1556 // esi: exception bcp
1557
1558 //
1559 // JVMTI PopFrame support
1560 //
1561
1562 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1563 __ empty_expression_stack();
1564 // Set the popframe_processing bit in pending_popframe_condition
1565 // indicating that we are currently handling popframe, so that
1566 // call_VMs that may happen later do not trigger new popframe
1567 // handling cycles.
1568 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1569 NOT_LP64(__ get_thread(thread));
1570 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1571 __ orl(rdx, JavaThread::popframe_processing_bit);
1572 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1573
1574 {
1575 // Check to see whether we are returning to a deoptimized frame.
1576 // (The PopFrame call ensures that the caller of the popped frame is
1577 // either interpreted or compiled and deoptimizes it if compiled.)
1578 // In this case, we can't call dispatch_next() after the frame is
1579 // popped, but instead must save the incoming arguments and restore
1580 // them after deoptimization has occurred.
1581 //
1582 // Note that we don't compare the return PC against the
1583 // deoptimization blob's unpack entry because of the presence of
1584 // adapter frames in C2.
1585 Label caller_not_deoptimized;
1586 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1587 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1588 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1589 InterpreterRuntime::interpreter_contains), rarg);
1590 __ testl(rax, rax);
1591 __ jcc(Assembler::notZero, caller_not_deoptimized);
1592
1593 // Compute size of arguments for saving when returning to
1594 // deoptimized caller
1595 __ get_method(rax);
1596 __ movptr(rax, Address(rax, Method::const_offset()));
1597 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1598 size_of_parameters_offset())));
1599 __ shll(rax, Interpreter::logStackElementSize);
1600 __ restore_locals();
1601 __ subptr(rlocals, rax);
1602 __ addptr(rlocals, wordSize);
1603 // Save these arguments
1604 NOT_LP64(__ get_thread(thread));
1605 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1606 Deoptimization::
1607 popframe_preserve_args),
1608 thread, rax, rlocals);
1609
1610 __ remove_activation(vtos, rdx,
1611 /* throw_monitor_exception */ false,
1612 /* install_monitor_exception */ false,
1613 /* notify_jvmdi */ false);
1614
1615 // Inform deoptimization that it is responsible for restoring
1616 // these arguments
1617 NOT_LP64(__ get_thread(thread));
1618 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1619 JavaThread::popframe_force_deopt_reexecution_bit);
1620
1621 // Continue in deoptimization handler
1622 __ jmp(rdx);
1623
1624 __ bind(caller_not_deoptimized);
1625 }
1626
1627 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1628 /* throw_monitor_exception */ false,
1629 /* install_monitor_exception */ false,
1630 /* notify_jvmdi */ false);
1631
1632 // Finish with popframe handling
1633 // A previous I2C followed by a deoptimization might have moved the
1634 // outgoing arguments further up the stack. PopFrame expects the
1635 // mutations to those outgoing arguments to be preserved and other
1636 // constraints basically require this frame to look exactly as
1637 // though it had previously invoked an interpreted activation with
1638 // no space between the top of the expression stack (current
1639 // last_sp) and the top of stack. Rather than force deopt to
1640 // maintain this kind of invariant all the time we call a small
1641 // fixup routine to move the mutated arguments onto the top of our
1642 // expression stack if necessary.
1643 #ifndef _LP64
1644 __ mov(rax, rsp);
1645 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1646 __ get_thread(thread);
1647 // PC must point into interpreter here
1648 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1649 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1650 __ get_thread(thread);
1651 #else
1652 __ mov(c_rarg1, rsp);
1653 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1654 // PC must point into interpreter here
1655 __ set_last_Java_frame(noreg, rbp, __ pc());
1656 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1657 #endif
1658 __ reset_last_Java_frame(thread, true);
1659
1660 // Restore the last_sp and null it out
1661 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1662 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1663
1664 __ restore_bcp();
1665 __ restore_locals();
1666 // The method data pointer was incremented already during
1667 // call profiling. We have to restore the mdp for the current bcp.
1668 if (ProfileInterpreter) {
1669 __ set_method_data_pointer_for_bcp();
1670 }
1671
1672 // Clear the popframe condition flag
1673 NOT_LP64(__ get_thread(thread));
1674 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1675 JavaThread::popframe_inactive);
1676
1677 #if INCLUDE_JVMTI
1678 {
1679 Label L_done;
1680 const Register local0 = rlocals;
1681
1682 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1683 __ jcc(Assembler::notEqual, L_done);
1684
1685 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1686 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1687
1688 __ get_method(rdx);
1689 __ movptr(rax, Address(local0, 0));
1690 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1691
1692 __ testptr(rax, rax);
1693 __ jcc(Assembler::zero, L_done);
1694
1695 __ movptr(Address(rbx, 0), rax);
1696 __ bind(L_done);
1697 }
1698 #endif // INCLUDE_JVMTI
1699
1700 __ dispatch_next(vtos);
1701 // end of PopFrame support
1702
1703 Interpreter::_remove_activation_entry = __ pc();
1704
1705 // preserve exception over this code sequence
1706 __ pop_ptr(rax);
1707 NOT_LP64(__ get_thread(thread));
1708 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1709 // remove the activation (without doing throws on illegalMonitorExceptions)
1710 __ remove_activation(vtos, rdx, false, true, false);
1711 // restore exception
1712 NOT_LP64(__ get_thread(thread));
1713 __ get_vm_result(rax, thread);
1714
1715 // In between activations - previous activation type unknown yet
1716 // compute continuation point - the continuation point expects the
1717 // following registers set up:
1718 //
1719 // rax: exception
1720 // rdx: return address/pc that threw exception
1721 // rsp: expression stack of caller
1722 // rbp: ebp of caller
1723 __ push(rax); // save exception
1724 __ push(rdx); // save return address
1725 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1726 SharedRuntime::exception_handler_for_return_address),
1727 thread, rdx);
1728 __ mov(rbx, rax); // save exception handler
1729 __ pop(rdx); // restore return address
1730 __ pop(rax); // restore exception
1731 // Note that an "issuing PC" is actually the next PC after the call
1732 __ jmp(rbx); // jump to exception
1733 // handler of caller
1734 }
1735
1736
1737 //
1738 // JVMTI ForceEarlyReturn support
1739 //
1740 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1741 address entry = __ pc();
1742
1743 __ restore_bcp();
1744 __ restore_locals();
1745 __ empty_expression_stack();
1746 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1747
1748 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1749 NOT_LP64(__ get_thread(thread));
1750 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1751 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1752
1753 // Clear the earlyret state
1754 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1755
1756 __ remove_activation(state, rsi,
1757 false, /* throw_monitor_exception */
1758 false, /* install_monitor_exception */
1759 true); /* notify_jvmdi */
1760 __ jmp(rsi);
1761
1762 return entry;
1763 } // end of ForceEarlyReturn support
1764
1765
1766 //-----------------------------------------------------------------------------
1767 // Helper for vtos entry point generation
1768
1769 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1770 address& bep,
1771 address& cep,
1772 address& sep,
1773 address& aep,
1774 address& iep,
1775 address& lep,
1776 address& fep,
1777 address& dep,
1778 address& vep) {
1779 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1780 Label L;
1781 aep = __ pc(); __ push_ptr(); __ jmp(L);
1782 #ifndef _LP64
1783 fep = __ pc(); __ push(ftos); __ jmp(L);
1784 dep = __ pc(); __ push(dtos); __ jmp(L);
1785 #else
1786 fep = __ pc(); __ push_f(xmm0); __ jmp(L);
1787 dep = __ pc(); __ push_d(xmm0); __ jmp(L);
1788 #endif // _LP64
1789 lep = __ pc(); __ push_l(); __ jmp(L);
1790 bep = cep = sep =
1791 iep = __ pc(); __ push_i();
1792 vep = __ pc();
1793 __ bind(L);
1794 generate_and_dispatch(t);
1795 }
1796
1797 //-----------------------------------------------------------------------------
1798
1799 // Non-product code
1800 #ifndef PRODUCT
1801
1802 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1803 address entry = __ pc();
1804
1805 #ifndef _LP64
1806 // prepare expression stack
1807 __ pop(rcx); // pop return address so expression stack is 'pure'
1808 __ push(state); // save tosca
1809
1810 // pass tosca registers as arguments & call tracer
1811 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1812 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1813 __ pop(state); // restore tosca
1814
1815 // return
1816 __ jmp(rcx);
1817 #else
1818 __ push(state);
1819 __ push(c_rarg0);
1820 __ push(c_rarg1);
1821 __ push(c_rarg2);
1822 __ push(c_rarg3);
1823 __ mov(c_rarg2, rax); // Pass itos
1824 #ifdef _WIN64
1825 __ movflt(xmm3, xmm0); // Pass ftos
1826 #endif
1827 __ call_VM(noreg,
1828 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1829 c_rarg1, c_rarg2, c_rarg3);
1830 __ pop(c_rarg3);
1831 __ pop(c_rarg2);
1832 __ pop(c_rarg1);
1833 __ pop(c_rarg0);
1834 __ pop(state);
1835 __ ret(0); // return from result handler
1836 #endif // _LP64
1837
1838 return entry;
1839 }
1840
1841 void TemplateInterpreterGenerator::count_bytecode() {
1842 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1843 }
1844
1845 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1846 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1847 }
1848
1849 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1850 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1851 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1852 __ orl(rbx,
1853 ((int) t->bytecode()) <<
1854 BytecodePairHistogram::log2_number_of_codes);
1855 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1856 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1857 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1858 }
1859
1860
1861 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1862 // Call a little run-time stub to avoid blow-up for each bytecode.
1863 // The run-time runtime saves the right registers, depending on
1864 // the tosca in-state for the given template.
1865
1866 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1867 "entry must have been generated");
1868 #ifndef _LP64
1869 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1870 #else
1871 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1872 __ andptr(rsp, -16); // align stack as required by ABI
1873 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1874 __ mov(rsp, r12); // restore sp
1875 __ reinit_heapbase();
1876 #endif // _LP64
1877 }
1878
1879
1880 void TemplateInterpreterGenerator::stop_interpreter_at() {
1881 Label L;
1882 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1883 StopInterpreterAt);
1884 __ jcc(Assembler::notEqual, L);
1885 __ int3();
1886 __ bind(L);
1887 }
1888 #endif // !PRODUCT