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 "compiler/disassembler.hpp"
28 #include "gc/shared/barrierSetAssembler.hpp"
29 #include "interpreter/bytecodeHistogram.hpp"
30 #include "interpreter/interp_masm.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/templateInterpreterGenerator.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "oops/arrayOop.hpp"
36 #include "oops/methodData.hpp"
37 #include "oops/method.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "prims/jvmtiThreadState.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/deoptimization.hpp"
43 #include "runtime/frame.inline.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/stubRoutines.hpp"
46 #include "runtime/synchronizer.hpp"
47 #include "runtime/timer.hpp"
48 #include "runtime/vframeArray.hpp"
49 #include "utilities/debug.hpp"
50 #include "utilities/macros.hpp"
51
52 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
53
54 // Size of interpreter code. Increase if too small. Interpreter will
55 // fail with a guarantee ("not enough space for interpreter generation");
56 // if too small.
57 // Run with +PrintInterpreter to get the VM to print out the size.
58 // Max size with JVMTI
59 #ifdef AMD64
60 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(268) NOT_JVMCI(256) * 1024;
61 #else
62 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
63 #endif // AMD64
64
65 // Global Register Names
66 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
67 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
68
69 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
70 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
71 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
72
73
74 //-----------------------------------------------------------------------------
75
76 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
77 address entry = __ pc();
78
79 #ifdef ASSERT
80 {
81 Label L;
82 __ lea(rax, Address(rbp,
83 frame::interpreter_frame_monitor_block_top_offset *
84 wordSize));
85 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
86 // grows negative)
87 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
88 __ stop ("interpreter frame not set up");
89 __ bind(L);
90 }
91 #endif // ASSERT
92 // Restore bcp under the assumption that the current frame is still
93 // interpreted
94 __ restore_bcp();
95
96 // expression stack must be empty before entering the VM if an
97 // exception happened
98 __ empty_expression_stack();
99 // throw exception
100 __ call_VM(noreg,
101 CAST_FROM_FN_PTR(address,
102 InterpreterRuntime::throw_StackOverflowError));
103 return entry;
104 }
105
106 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
107 address entry = __ pc();
108 // The expression stack must be empty before entering the VM if an
109 // exception happened.
110 __ empty_expression_stack();
111
112 // Setup parameters.
113 // ??? convention: expect aberrant index in register ebx/rbx.
114 // Pass array to create more detailed exceptions.
115 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
116 __ call_VM(noreg,
117 CAST_FROM_FN_PTR(address,
118 InterpreterRuntime::
119 throw_ArrayIndexOutOfBoundsException),
120 rarg, rbx);
121 return entry;
122 }
123
124 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
125 address entry = __ pc();
126
127 // object is at TOS
128 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
129 __ pop(rarg);
130
131 // expression stack must be empty before entering the VM if an
132 // exception happened
133 __ empty_expression_stack();
134
135 __ call_VM(noreg,
136 CAST_FROM_FN_PTR(address,
137 InterpreterRuntime::
138 throw_ClassCastException),
139 rarg);
140 return entry;
141 }
142
143 address TemplateInterpreterGenerator::generate_exception_handler_common(
144 const char* name, const char* message, bool pass_oop) {
145 assert(!pass_oop || message == NULL, "either oop or message but not both");
146 address entry = __ pc();
147
148 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
149 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
150
151 if (pass_oop) {
152 // object is at TOS
153 __ pop(rarg2);
154 }
155 // expression stack must be empty before entering the VM if an
156 // exception happened
157 __ empty_expression_stack();
158 // setup parameters
159 __ lea(rarg, ExternalAddress((address)name));
160 if (pass_oop) {
161 __ call_VM(rax, CAST_FROM_FN_PTR(address,
162 InterpreterRuntime::
163 create_klass_exception),
164 rarg, rarg2);
165 } else {
166 __ lea(rarg2, ExternalAddress((address)message));
167 __ call_VM(rax,
168 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
169 rarg, rarg2);
170 }
171 // throw exception
172 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
173 return entry;
174 }
175
176 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
177 address entry = __ pc();
178
179 #ifndef _LP64
180 #ifdef COMPILER2
181 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
182 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
183 for (int i = 1; i < 8; i++) {
184 __ ffree(i);
185 }
186 } else if (UseSSE < 2) {
187 __ empty_FPU_stack();
188 }
189 #endif // COMPILER2
190 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
191 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
192 } else {
193 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
194 }
195
196 if (state == ftos) {
197 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
198 } else if (state == dtos) {
199 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
200 }
201 #endif // _LP64
202
203 // Restore stack bottom in case i2c adjusted stack
204 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
205 // and NULL it as marker that esp is now tos until next java call
206 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
207
208 __ restore_bcp();
209 __ restore_locals();
210
211 if (state == atos) {
212 Register mdp = rbx;
213 Register tmp = rcx;
214 __ profile_return_type(mdp, rax, tmp);
215 }
216
217 const Register cache = rbx;
218 const Register index = rcx;
219 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
220
221 const Register flags = cache;
222 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
223 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
224 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
225
226 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
227 if (JvmtiExport::can_pop_frame()) {
228 NOT_LP64(__ get_thread(java_thread));
229 __ check_and_handle_popframe(java_thread);
230 }
231 if (JvmtiExport::can_force_early_return()) {
232 NOT_LP64(__ get_thread(java_thread));
233 __ check_and_handle_earlyret(java_thread);
234 }
235
236 __ dispatch_next(state, step);
237
238 return entry;
239 }
240
241
242 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
243 address entry = __ pc();
244
245 #ifndef _LP64
246 if (state == ftos) {
247 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
248 } else if (state == dtos) {
249 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
250 }
251 #endif // _LP64
252
253 // NULL last_sp until next java call
254 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
255 __ restore_bcp();
256 __ restore_locals();
257 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
258 NOT_LP64(__ get_thread(thread));
259 #if INCLUDE_JVMCI
260 // Check if we need to take lock at entry of synchronized method. This can
261 // only occur on method entry so emit it only for vtos with step 0.
262 if ((EnableJVMCI || UseAOT) && state == vtos && step == 0) {
263 Label L;
264 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
265 __ jcc(Assembler::zero, L);
266 // Clear flag.
267 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
268 // Satisfy calling convention for lock_method().
269 __ get_method(rbx);
270 // Take lock.
271 lock_method();
272 __ bind(L);
273 } else {
274 #ifdef ASSERT
275 if (EnableJVMCI) {
276 Label L;
277 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
278 __ jcc(Assembler::zero, L);
279 __ stop("unexpected pending monitor in deopt entry");
280 __ bind(L);
281 }
282 #endif
283 }
284 #endif
285 // handle exceptions
286 {
287 Label L;
288 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
289 __ jcc(Assembler::zero, L);
290 __ call_VM(noreg,
291 CAST_FROM_FN_PTR(address,
292 InterpreterRuntime::throw_pending_exception));
293 __ should_not_reach_here();
294 __ bind(L);
295 }
296 if (continuation == NULL) {
297 __ dispatch_next(state, step);
298 } else {
299 __ jump_to_entry(continuation);
300 }
301 return entry;
302 }
303
304 address TemplateInterpreterGenerator::generate_result_handler_for(
305 BasicType type) {
306 address entry = __ pc();
307 switch (type) {
308 case T_BOOLEAN: __ c2bool(rax); break;
309 #ifndef _LP64
310 case T_CHAR : __ andptr(rax, 0xFFFF); break;
311 #else
312 case T_CHAR : __ movzwl(rax, rax); break;
313 #endif // _LP64
314 case T_BYTE : __ sign_extend_byte(rax); break;
315 case T_SHORT : __ sign_extend_short(rax); break;
316 case T_INT : /* nothing to do */ break;
317 case T_LONG : /* nothing to do */ break;
318 case T_VOID : /* nothing to do */ break;
319 #ifndef _LP64
320 case T_DOUBLE :
321 case T_FLOAT :
322 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
323 __ pop(t); // remove return address first
324 // Must return a result for interpreter or compiler. In SSE
325 // mode, results are returned in xmm0 and the FPU stack must
326 // be empty.
327 if (type == T_FLOAT && UseSSE >= 1) {
328 // Load ST0
329 __ fld_d(Address(rsp, 0));
330 // Store as float and empty fpu stack
331 __ fstp_s(Address(rsp, 0));
332 // and reload
333 __ movflt(xmm0, Address(rsp, 0));
334 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
335 __ movdbl(xmm0, Address(rsp, 0));
336 } else {
337 // restore ST0
338 __ fld_d(Address(rsp, 0));
339 }
340 // and pop the temp
341 __ addptr(rsp, 2 * wordSize);
342 __ push(t); // restore return address
343 }
344 break;
345 #else
346 case T_FLOAT : /* nothing to do */ break;
347 case T_DOUBLE : /* nothing to do */ break;
348 #endif // _LP64
349
350 case T_OBJECT :
351 // retrieve result from frame
352 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
353 // and verify it
354 __ verify_oop(rax);
355 break;
356 default : ShouldNotReachHere();
357 }
358 __ ret(0); // return from result handler
359 return entry;
360 }
361
362 address TemplateInterpreterGenerator::generate_safept_entry_for(
363 TosState state,
364 address runtime_entry) {
365 address entry = __ pc();
366 __ push(state);
367 __ call_VM(noreg, runtime_entry);
368 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
369 return entry;
370 }
371
372
373
374 // Helpers for commoning out cases in the various type of method entries.
375 //
376
377
378 // increment invocation count & check for overflow
379 //
380 // Note: checking for negative value instead of overflow
381 // so we have a 'sticky' overflow test
382 //
383 // rbx: method
384 // rcx: invocation counter
385 //
386 void TemplateInterpreterGenerator::generate_counter_incr(
387 Label* overflow,
388 Label* profile_method,
389 Label* profile_method_continue) {
390 Label done;
391 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
392 if (TieredCompilation) {
393 int increment = InvocationCounter::count_increment;
394 Label no_mdo;
395 if (ProfileInterpreter) {
396 // Are we profiling?
397 __ movptr(rax, Address(rbx, Method::method_data_offset()));
398 __ testptr(rax, rax);
399 __ jccb(Assembler::zero, no_mdo);
400 // Increment counter in the MDO
401 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
402 in_bytes(InvocationCounter::counter_offset()));
403 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
404 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
405 __ jmp(done);
406 }
407 __ bind(no_mdo);
408 // Increment counter in MethodCounters
409 const Address invocation_counter(rax,
410 MethodCounters::invocation_counter_offset() +
411 InvocationCounter::counter_offset());
412 __ get_method_counters(rbx, rax, done);
413 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
414 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
415 false, Assembler::zero, overflow);
416 __ bind(done);
417 } else { // not TieredCompilation
418 const Address backedge_counter(rax,
419 MethodCounters::backedge_counter_offset() +
420 InvocationCounter::counter_offset());
421 const Address invocation_counter(rax,
422 MethodCounters::invocation_counter_offset() +
423 InvocationCounter::counter_offset());
424
425 __ get_method_counters(rbx, rax, done);
426
427 if (ProfileInterpreter) {
428 __ incrementl(Address(rax,
429 MethodCounters::interpreter_invocation_counter_offset()));
430 }
431 // Update standard invocation counters
432 __ movl(rcx, invocation_counter);
433 __ incrementl(rcx, InvocationCounter::count_increment);
434 __ movl(invocation_counter, rcx); // save invocation count
435
436 __ movl(rax, backedge_counter); // load backedge counter
437 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
438
439 __ addl(rcx, rax); // add both counters
440
441 // profile_method is non-null only for interpreted method so
442 // profile_method != NULL == !native_call
443
444 if (ProfileInterpreter && profile_method != NULL) {
445 // Test to see if we should create a method data oop
446 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
447 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
448 __ jcc(Assembler::less, *profile_method_continue);
449
450 // if no method data exists, go to profile_method
451 __ test_method_data_pointer(rax, *profile_method);
452 }
453
454 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
455 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
456 __ jcc(Assembler::aboveEqual, *overflow);
457 __ bind(done);
458 }
459 }
460
461 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
462
463 // Asm interpreter on entry
464 // r14/rdi - locals
465 // r13/rsi - bcp
466 // rbx - method
467 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
468 // rbp - interpreter frame
469
470 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
471 // Everything as it was on entry
472 // rdx is not restored. Doesn't appear to really be set.
473
474 // InterpreterRuntime::frequency_counter_overflow takes two
475 // arguments, the first (thread) is passed by call_VM, the second
476 // indicates if the counter overflow occurs at a backwards branch
477 // (NULL bcp). We pass zero for it. The call returns the address
478 // of the verified entry point for the method or NULL if the
479 // compilation did not complete (either went background or bailed
480 // out).
481 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
482 __ movl(rarg, 0);
483 __ call_VM(noreg,
484 CAST_FROM_FN_PTR(address,
485 InterpreterRuntime::frequency_counter_overflow),
486 rarg);
487
488 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
489 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
490 // and jump to the interpreted entry.
491 __ jmp(do_continue, relocInfo::none);
492 }
493
494 // See if we've got enough room on the stack for locals plus overhead below
495 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
496 // without going through the signal handler, i.e., reserved and yellow zones
497 // will not be made usable. The shadow zone must suffice to handle the
498 // overflow.
499 // The expression stack grows down incrementally, so the normal guard
500 // page mechanism will work for that.
501 //
502 // NOTE: Since the additional locals are also always pushed (wasn't
503 // obvious in generate_fixed_frame) so the guard should work for them
504 // too.
505 //
506 // Args:
507 // rdx: number of additional locals this frame needs (what we must check)
508 // rbx: Method*
509 //
510 // Kills:
511 // rax
512 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
513
514 // monitor entry size: see picture of stack in frame_x86.hpp
515 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
516
517 // total overhead size: entry_size + (saved rbp through expr stack
518 // bottom). be sure to change this if you add/subtract anything
519 // to/from the overhead area
520 const int overhead_size =
521 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
522
523 const int page_size = os::vm_page_size();
524
525 Label after_frame_check;
526
527 // see if the frame is greater than one page in size. If so,
528 // then we need to verify there is enough stack space remaining
529 // for the additional locals.
530 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
531 __ jcc(Assembler::belowEqual, after_frame_check);
532
533 // compute rsp as if this were going to be the last frame on
534 // the stack before the red zone
535
536 Label after_frame_check_pop;
537 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
538 #ifndef _LP64
539 __ push(thread);
540 __ get_thread(thread);
541 #endif
542
543 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
544
545 // locals + overhead, in bytes
546 __ mov(rax, rdx);
547 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
548 __ addptr(rax, overhead_size);
549
550 #ifdef ASSERT
551 Label limit_okay;
552 // Verify that thread stack overflow limit is non-zero.
553 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
554 __ jcc(Assembler::notEqual, limit_okay);
555 __ stop("stack overflow limit is zero");
556 __ bind(limit_okay);
557 #endif
558
559 // Add locals/frame size to stack limit.
560 __ addptr(rax, stack_limit);
561
562 // Check against the current stack bottom.
563 __ cmpptr(rsp, rax);
564
565 __ jcc(Assembler::above, after_frame_check_pop);
566 NOT_LP64(__ pop(rsi)); // get saved bcp
567
568 // Restore sender's sp as SP. This is necessary if the sender's
569 // frame is an extended compiled frame (see gen_c2i_adapter())
570 // and safer anyway in case of JSR292 adaptations.
571
572 __ pop(rax); // return address must be moved if SP is changed
573 __ mov(rsp, rbcp);
574 __ push(rax);
575
576 // Note: the restored frame is not necessarily interpreted.
577 // Use the shared runtime version of the StackOverflowError.
578 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
579 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
580 // all done with frame size check
581 __ bind(after_frame_check_pop);
582 NOT_LP64(__ pop(rsi));
583
584 // all done with frame size check
585 __ bind(after_frame_check);
586 }
587
588 // Allocate monitor and lock method (asm interpreter)
589 //
590 // Args:
591 // rbx: Method*
592 // r14/rdi: locals
593 //
594 // Kills:
595 // rax
596 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
597 // rscratch1, rscratch2 (scratch regs)
598 void TemplateInterpreterGenerator::lock_method() {
599 // synchronize method
600 const Address access_flags(rbx, Method::access_flags_offset());
601 const Address monitor_block_top(
602 rbp,
603 frame::interpreter_frame_monitor_block_top_offset * wordSize);
604 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
605
606 #ifdef ASSERT
607 {
608 Label L;
609 __ movl(rax, access_flags);
610 __ testl(rax, JVM_ACC_SYNCHRONIZED);
611 __ jcc(Assembler::notZero, L);
612 __ stop("method doesn't need synchronization");
613 __ bind(L);
614 }
615 #endif // ASSERT
616
617 // get synchronization object
618 {
619 Label done;
620 __ movl(rax, access_flags);
621 __ testl(rax, JVM_ACC_STATIC);
622 // get receiver (assume this is frequent case)
623 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
624 __ jcc(Assembler::zero, done);
625 __ load_mirror(rax, rbx);
626
627 #ifdef ASSERT
628 {
629 Label L;
630 __ testptr(rax, rax);
631 __ jcc(Assembler::notZero, L);
632 __ stop("synchronization object is NULL");
633 __ bind(L);
634 }
635 #endif // ASSERT
636
637 __ bind(done);
638 __ resolve(IS_NOT_NULL, rax);
639 }
640
641 // add space for monitor & lock
642 __ subptr(rsp, entry_size); // add space for a monitor entry
643 __ movptr(monitor_block_top, rsp); // set new monitor block top
644 // store object
645 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
646 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
647 __ movptr(lockreg, rsp); // object address
648 __ lock_object(lockreg);
649 }
650
651 // Generate a fixed interpreter frame. This is identical setup for
652 // interpreted methods and for native methods hence the shared code.
653 //
654 // Args:
655 // rax: return address
656 // rbx: Method*
657 // r14/rdi: pointer to locals
658 // r13/rsi: sender sp
659 // rdx: cp cache
660 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
661 // initialize fixed part of activation frame
662 __ push(rax); // save return address
663 __ enter(); // save old & set new rbp
664 __ push(rbcp); // set sender sp
665 __ push((int)NULL_WORD); // leave last_sp as null
666 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
667 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
668 __ push(rbx); // save Method*
669 // Get mirror and store it in the frame as GC root for this Method*
670 __ load_mirror(rdx, rbx);
671 __ push(rdx);
672 if (ProfileInterpreter) {
673 Label method_data_continue;
674 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
675 __ testptr(rdx, rdx);
676 __ jcc(Assembler::zero, method_data_continue);
677 __ addptr(rdx, in_bytes(MethodData::data_offset()));
678 __ bind(method_data_continue);
679 __ push(rdx); // set the mdp (method data pointer)
680 } else {
681 __ push(0);
682 }
683
684 __ movptr(rdx, Address(rbx, Method::const_offset()));
685 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
686 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
687 __ push(rdx); // set constant pool cache
688 __ push(rlocals); // set locals pointer
689 if (native_call) {
690 __ push(0); // no bcp
691 } else {
692 __ push(rbcp); // set bcp
693 }
694 __ push(0); // reserve word for pointer to expression stack bottom
695 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
696 }
697
698 // End of helpers
699
700 // Method entry for java.lang.ref.Reference.get.
701 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
702 // Code: _aload_0, _getfield, _areturn
703 // parameter size = 1
704 //
705 // The code that gets generated by this routine is split into 2 parts:
706 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load,
707 // 2. The slow path - which is an expansion of the regular method entry.
708 //
709 // Notes:-
710 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed.
711 // * We may jump to the slow path iff the receiver is null. If the
712 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load
713 // Thus we can use the regular method entry code to generate the NPE.
714 //
715 // rbx: Method*
716
717 // r13: senderSP must preserve for slow path, set SP to it on fast path
718
719 address entry = __ pc();
720
721 const int referent_offset = java_lang_ref_Reference::referent_offset;
722 guarantee(referent_offset > 0, "referent offset not initialized");
723
724 Label slow_path;
725 // rbx: method
726
727 // Check if local 0 != NULL
728 // If the receiver is null then it is OK to jump to the slow path.
729 __ movptr(rax, Address(rsp, wordSize));
730
731 __ testptr(rax, rax);
732 __ jcc(Assembler::zero, slow_path);
733
734 // rax: local 0
735 // rbx: method (but can be used as scratch now)
736 // rdx: scratch
737 // rdi: scratch
738
739 // Preserve the sender sp in case the load barrier
740 // calls the runtime
741 NOT_LP64(__ push(rsi));
742
743 // Load the value of the referent field.
744 const Address field_address(rax, referent_offset);
745 __ load_heap_oop(rax, field_address, /*tmp1*/ rbx, /*tmp_thread*/ rdx, ON_WEAK_OOP_REF);
746
747 // _areturn
748 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
749 NOT_LP64(__ pop(rsi)); // get sender sp
750 __ pop(rdi); // get return address
751 __ mov(rsp, sender_sp); // set sp to sender sp
752 __ jmp(rdi);
753 __ ret(0);
754
755 // generate a vanilla interpreter entry as the slow path
756 __ bind(slow_path);
757 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
758 return entry;
759 }
760
761 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
762 // Quick & dirty stack overflow checking: bang the stack & handle trap.
763 // Note that we do the banging after the frame is setup, since the exception
764 // handling code expects to find a valid interpreter frame on the stack.
765 // Doing the banging earlier fails if the caller frame is not an interpreter
766 // frame.
767 // (Also, the exception throwing code expects to unlock any synchronized
768 // method receiever, so do the banging after locking the receiver.)
769
770 // Bang each page in the shadow zone. We can't assume it's been done for
771 // an interpreter frame with greater than a page of locals, so each page
772 // needs to be checked. Only true for non-native.
773 if (UseStackBanging) {
774 const int page_size = os::vm_page_size();
775 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size;
776 const int start_page = native_call ? n_shadow_pages : 1;
777 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
778 __ bang_stack_with_offset(pages*page_size);
779 }
780 }
781 }
782
783 // Interpreter stub for calling a native method. (asm interpreter)
784 // This sets up a somewhat different looking stack for calling the
785 // native method than the typical interpreter frame setup.
786 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
787 // determine code generation flags
788 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
789
790 // rbx: Method*
791 // rbcp: sender sp
792
793 address entry_point = __ pc();
794
795 const Address constMethod (rbx, Method::const_offset());
796 const Address access_flags (rbx, Method::access_flags_offset());
797 const Address size_of_parameters(rcx, ConstMethod::
798 size_of_parameters_offset());
799
800
801 // get parameter size (always needed)
802 __ movptr(rcx, constMethod);
803 __ load_unsigned_short(rcx, size_of_parameters);
804
805 // native calls don't need the stack size check since they have no
806 // expression stack and the arguments are already on the stack and
807 // we only add a handful of words to the stack
808
809 // rbx: Method*
810 // rcx: size of parameters
811 // rbcp: sender sp
812 __ pop(rax); // get return address
813
814 // for natives the size of locals is zero
815
816 // compute beginning of parameters
817 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
818
819 // add 2 zero-initialized slots for native calls
820 // initialize result_handler slot
821 __ push((int) NULL_WORD);
822 // slot for oop temp
823 // (static native method holder mirror/jni oop result)
824 __ push((int) NULL_WORD);
825
826 // initialize fixed part of activation frame
827 generate_fixed_frame(true);
828
829 // make sure method is native & not abstract
830 #ifdef ASSERT
831 __ movl(rax, access_flags);
832 {
833 Label L;
834 __ testl(rax, JVM_ACC_NATIVE);
835 __ jcc(Assembler::notZero, L);
836 __ stop("tried to execute non-native method as native");
837 __ bind(L);
838 }
839 {
840 Label L;
841 __ testl(rax, JVM_ACC_ABSTRACT);
842 __ jcc(Assembler::zero, L);
843 __ stop("tried to execute abstract method in interpreter");
844 __ bind(L);
845 }
846 #endif
847
848 // Since at this point in the method invocation the exception handler
849 // would try to exit the monitor of synchronized methods which hasn't
850 // been entered yet, we set the thread local variable
851 // _do_not_unlock_if_synchronized to true. The remove_activation will
852 // check this flag.
853
854 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
855 NOT_LP64(__ get_thread(thread1));
856 const Address do_not_unlock_if_synchronized(thread1,
857 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
858 __ movbool(do_not_unlock_if_synchronized, true);
859
860 // increment invocation count & check for overflow
861 Label invocation_counter_overflow;
862 if (inc_counter) {
863 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
864 }
865
866 Label continue_after_compile;
867 __ bind(continue_after_compile);
868
869 bang_stack_shadow_pages(true);
870
871 // reset the _do_not_unlock_if_synchronized flag
872 NOT_LP64(__ get_thread(thread1));
873 __ movbool(do_not_unlock_if_synchronized, false);
874
875 // check for synchronized methods
876 // Must happen AFTER invocation_counter check and stack overflow check,
877 // so method is not locked if overflows.
878 if (synchronized) {
879 lock_method();
880 } else {
881 // no synchronization necessary
882 #ifdef ASSERT
883 {
884 Label L;
885 __ movl(rax, access_flags);
886 __ testl(rax, JVM_ACC_SYNCHRONIZED);
887 __ jcc(Assembler::zero, L);
888 __ stop("method needs synchronization");
889 __ bind(L);
890 }
891 #endif
892 }
893
894 // start execution
895 #ifdef ASSERT
896 {
897 Label L;
898 const Address monitor_block_top(rbp,
899 frame::interpreter_frame_monitor_block_top_offset * wordSize);
900 __ movptr(rax, monitor_block_top);
901 __ cmpptr(rax, rsp);
902 __ jcc(Assembler::equal, L);
903 __ stop("broken stack frame setup in interpreter");
904 __ bind(L);
905 }
906 #endif
907
908 // jvmti support
909 __ notify_method_entry();
910
911 // work registers
912 const Register method = rbx;
913 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
914 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
915
916 // allocate space for parameters
917 __ get_method(method);
918 __ movptr(t, Address(method, Method::const_offset()));
919 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
920
921 #ifndef _LP64
922 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
923 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
924 __ subptr(rsp, t);
925 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
926 #else
927 __ shll(t, Interpreter::logStackElementSize);
928
929 __ subptr(rsp, t);
930 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
931 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
932 #endif // _LP64
933
934 // get signature handler
935 {
936 Label L;
937 __ movptr(t, Address(method, Method::signature_handler_offset()));
938 __ testptr(t, t);
939 __ jcc(Assembler::notZero, L);
940 __ call_VM(noreg,
941 CAST_FROM_FN_PTR(address,
942 InterpreterRuntime::prepare_native_call),
943 method);
944 __ get_method(method);
945 __ movptr(t, Address(method, Method::signature_handler_offset()));
946 __ bind(L);
947 }
948
949 // call signature handler
950 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
951 "adjust this code");
952 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
953 "adjust this code");
954 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
955 "adjust this code");
956
957 // The generated handlers do not touch RBX (the method oop).
958 // However, large signatures cannot be cached and are generated
959 // each time here. The slow-path generator can do a GC on return,
960 // so we must reload it after the call.
961 __ call(t);
962 __ get_method(method); // slow path can do a GC, reload RBX
963
964
965 // result handler is in rax
966 // set result handler
967 __ movptr(Address(rbp,
968 (frame::interpreter_frame_result_handler_offset) * wordSize),
969 rax);
970
971 // pass mirror handle if static call
972 {
973 Label L;
974 __ movl(t, Address(method, Method::access_flags_offset()));
975 __ testl(t, JVM_ACC_STATIC);
976 __ jcc(Assembler::zero, L);
977 // get mirror
978 __ load_mirror(t, method, rax);
979 // copy mirror into activation frame
980 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
981 t);
982 // pass handle to mirror
983 #ifndef _LP64
984 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
985 __ movptr(Address(rsp, wordSize), t);
986 #else
987 __ lea(c_rarg1,
988 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
989 #endif // _LP64
990 __ bind(L);
991 }
992
993 // get native function entry point
994 {
995 Label L;
996 __ movptr(rax, Address(method, Method::native_function_offset()));
997 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
998 __ cmpptr(rax, unsatisfied.addr());
999 __ jcc(Assembler::notEqual, L);
1000 __ call_VM(noreg,
1001 CAST_FROM_FN_PTR(address,
1002 InterpreterRuntime::prepare_native_call),
1003 method);
1004 __ get_method(method);
1005 __ movptr(rax, Address(method, Method::native_function_offset()));
1006 __ bind(L);
1007 }
1008
1009 // pass JNIEnv
1010 #ifndef _LP64
1011 __ get_thread(thread);
1012 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1013 __ movptr(Address(rsp, 0), t);
1014
1015 // set_last_Java_frame_before_call
1016 // It is enough that the pc()
1017 // points into the right code segment. It does not have to be the correct return pc.
1018 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1019 #else
1020 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1021
1022 // It is enough that the pc() points into the right code
1023 // segment. It does not have to be the correct return pc.
1024 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1025 #endif // _LP64
1026
1027 // change thread state
1028 #ifdef ASSERT
1029 {
1030 Label L;
1031 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1032 __ cmpl(t, _thread_in_Java);
1033 __ jcc(Assembler::equal, L);
1034 __ stop("Wrong thread state in native stub");
1035 __ bind(L);
1036 }
1037 #endif
1038
1039 // Change state to native
1040
1041 __ movl(Address(thread, JavaThread::thread_state_offset()),
1042 _thread_in_native);
1043
1044 // Call the native method.
1045 __ call(rax);
1046 // 32: result potentially in rdx:rax or ST0
1047 // 64: result potentially in rax or xmm0
1048
1049 // Verify or restore cpu control state after JNI call
1050 __ restore_cpu_control_state_after_jni();
1051
1052 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1053 // in order to extract the result of a method call. If the order of these
1054 // pushes change or anything else is added to the stack then the code in
1055 // interpreter_frame_result must also change.
1056
1057 #ifndef _LP64
1058 // save potential result in ST(0) & rdx:rax
1059 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1060 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1061 // It is safe to do this push because state is _thread_in_native and return address will be found
1062 // via _last_native_pc and not via _last_jave_sp
1063
1064 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1065 // If the order changes or anything else is added to the stack the code in
1066 // interpreter_frame_result will have to be changed.
1067
1068 { Label L;
1069 Label push_double;
1070 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1071 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1072 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1073 float_handler.addr());
1074 __ jcc(Assembler::equal, push_double);
1075 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1076 double_handler.addr());
1077 __ jcc(Assembler::notEqual, L);
1078 __ bind(push_double);
1079 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1080 __ bind(L);
1081 }
1082 #else
1083 __ push(dtos);
1084 #endif // _LP64
1085
1086 __ push(ltos);
1087
1088 // change thread state
1089 NOT_LP64(__ get_thread(thread));
1090 __ movl(Address(thread, JavaThread::thread_state_offset()),
1091 _thread_in_native_trans);
1092
1093 if (os::is_MP()) {
1094 if (UseMembar) {
1095 // Force this write out before the read below
1096 __ membar(Assembler::Membar_mask_bits(
1097 Assembler::LoadLoad | Assembler::LoadStore |
1098 Assembler::StoreLoad | Assembler::StoreStore));
1099 } else {
1100 // Write serialization page so VM thread can do a pseudo remote membar.
1101 // We use the current thread pointer to calculate a thread specific
1102 // offset to write to within the page. This minimizes bus traffic
1103 // due to cache line collision.
1104 __ serialize_memory(thread, rcx);
1105 }
1106 }
1107
1108 #ifndef _LP64
1109 if (AlwaysRestoreFPU) {
1110 // Make sure the control word is correct.
1111 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1112 }
1113 #endif // _LP64
1114
1115 // check for safepoint operation in progress and/or pending suspend requests
1116 {
1117 Label Continue;
1118 Label slow_path;
1119
1120 #ifndef _LP64
1121 __ safepoint_poll(slow_path, thread, noreg);
1122 #else
1123 __ safepoint_poll(slow_path, r15_thread, rscratch1);
1124 #endif
1125
1126 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1127 __ jcc(Assembler::equal, Continue);
1128 __ bind(slow_path);
1129
1130 // Don't use call_VM as it will see a possible pending exception
1131 // and forward it and never return here preventing us from
1132 // clearing _last_native_pc down below. Also can't use
1133 // call_VM_leaf either as it will check to see if r13 & r14 are
1134 // preserved and correspond to the bcp/locals pointers. So we do a
1135 // runtime call by hand.
1136 //
1137 #ifndef _LP64
1138 __ push(thread);
1139 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1140 JavaThread::check_special_condition_for_native_trans)));
1141 __ increment(rsp, wordSize);
1142 __ get_thread(thread);
1143 #else
1144 __ mov(c_rarg0, r15_thread);
1145 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1146 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1147 __ andptr(rsp, -16); // align stack as required by ABI
1148 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1149 __ mov(rsp, r12); // restore sp
1150 __ reinit_heapbase();
1151 #endif // _LP64
1152 __ bind(Continue);
1153 }
1154
1155 // change thread state
1156 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1157
1158 // reset_last_Java_frame
1159 __ reset_last_Java_frame(thread, true);
1160
1161 if (CheckJNICalls) {
1162 // clear_pending_jni_exception_check
1163 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1164 }
1165
1166 // reset handle block
1167 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1168 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1169
1170 // If result is an oop unbox and store it in frame where gc will see it
1171 // and result handler will pick it up
1172
1173 {
1174 Label no_oop, not_weak, store_result;
1175 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1176 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1177 __ jcc(Assembler::notEqual, no_oop);
1178 // retrieve result
1179 __ pop(ltos);
1180 // Unbox oop result, e.g. JNIHandles::resolve value.
1181 __ resolve_jobject(rax /* value */,
1182 thread /* thread */,
1183 t /* tmp */);
1184 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1185 // keep stack depth as expected by pushing oop which will eventually be discarded
1186 __ push(ltos);
1187 __ bind(no_oop);
1188 }
1189
1190
1191 {
1192 Label no_reguard;
1193 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1194 JavaThread::stack_guard_yellow_reserved_disabled);
1195 __ jcc(Assembler::notEqual, no_reguard);
1196
1197 __ pusha(); // XXX only save smashed registers
1198 #ifndef _LP64
1199 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1200 __ popa();
1201 #else
1202 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1203 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1204 __ andptr(rsp, -16); // align stack as required by ABI
1205 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1206 __ mov(rsp, r12); // restore sp
1207 __ popa(); // XXX only restore smashed registers
1208 __ reinit_heapbase();
1209 #endif // _LP64
1210
1211 __ bind(no_reguard);
1212 }
1213
1214
1215 // The method register is junk from after the thread_in_native transition
1216 // until here. Also can't call_VM until the bcp has been
1217 // restored. Need bcp for throwing exception below so get it now.
1218 __ get_method(method);
1219
1220 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1221 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1222 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1223
1224 // handle exceptions (exception handling will handle unlocking!)
1225 {
1226 Label L;
1227 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1228 __ jcc(Assembler::zero, L);
1229 // Note: At some point we may want to unify this with the code
1230 // used in call_VM_base(); i.e., we should use the
1231 // StubRoutines::forward_exception code. For now this doesn't work
1232 // here because the rsp is not correctly set at this point.
1233 __ MacroAssembler::call_VM(noreg,
1234 CAST_FROM_FN_PTR(address,
1235 InterpreterRuntime::throw_pending_exception));
1236 __ should_not_reach_here();
1237 __ bind(L);
1238 }
1239
1240 // do unlocking if necessary
1241 {
1242 Label L;
1243 __ movl(t, Address(method, Method::access_flags_offset()));
1244 __ testl(t, JVM_ACC_SYNCHRONIZED);
1245 __ jcc(Assembler::zero, L);
1246 // the code below should be shared with interpreter macro
1247 // assembler implementation
1248 {
1249 Label unlock;
1250 // BasicObjectLock will be first in list, since this is a
1251 // synchronized method. However, need to check that the object
1252 // has not been unlocked by an explicit monitorexit bytecode.
1253 const Address monitor(rbp,
1254 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1255 wordSize - (int)sizeof(BasicObjectLock)));
1256
1257 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1258
1259 // monitor expect in c_rarg1 for slow unlock path
1260 __ lea(regmon, monitor); // address of first monitor
1261
1262 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1263 __ testptr(t, t);
1264 __ jcc(Assembler::notZero, unlock);
1265
1266 // Entry already unlocked, need to throw exception
1267 __ MacroAssembler::call_VM(noreg,
1268 CAST_FROM_FN_PTR(address,
1269 InterpreterRuntime::throw_illegal_monitor_state_exception));
1270 __ should_not_reach_here();
1271
1272 __ bind(unlock);
1273 __ unlock_object(regmon);
1274 }
1275 __ bind(L);
1276 }
1277
1278 // jvmti support
1279 // Note: This must happen _after_ handling/throwing any exceptions since
1280 // the exception handler code notifies the runtime of method exits
1281 // too. If this happens before, method entry/exit notifications are
1282 // not properly paired (was bug - gri 11/22/99).
1283 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1284
1285 // restore potential result in edx:eax, call result handler to
1286 // restore potential result in ST0 & handle result
1287
1288 __ pop(ltos);
1289 LP64_ONLY( __ pop(dtos));
1290
1291 __ movptr(t, Address(rbp,
1292 (frame::interpreter_frame_result_handler_offset) * wordSize));
1293 __ call(t);
1294
1295 // remove activation
1296 __ movptr(t, Address(rbp,
1297 frame::interpreter_frame_sender_sp_offset *
1298 wordSize)); // get sender sp
1299 __ leave(); // remove frame anchor
1300 __ pop(rdi); // get return address
1301 __ mov(rsp, t); // set sp to sender sp
1302 __ jmp(rdi);
1303
1304 if (inc_counter) {
1305 // Handle overflow of counter and compile method
1306 __ bind(invocation_counter_overflow);
1307 generate_counter_overflow(continue_after_compile);
1308 }
1309
1310 return entry_point;
1311 }
1312
1313 // Abstract method entry
1314 // Attempt to execute abstract method. Throw exception
1315 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1316
1317 address entry_point = __ pc();
1318
1319 // abstract method entry
1320
1321 // pop return address, reset last_sp to NULL
1322 __ empty_expression_stack();
1323 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1324 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1325
1326 // throw exception
1327 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), rbx);
1328 // the call_VM checks for exception, so we should never return here.
1329 __ should_not_reach_here();
1330
1331 return entry_point;
1332 }
1333
1334 //
1335 // Generic interpreted method entry to (asm) interpreter
1336 //
1337 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1338 // determine code generation flags
1339 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1340
1341 // ebx: Method*
1342 // rbcp: sender sp
1343 address entry_point = __ pc();
1344
1345 const Address constMethod(rbx, Method::const_offset());
1346 const Address access_flags(rbx, Method::access_flags_offset());
1347 const Address size_of_parameters(rdx,
1348 ConstMethod::size_of_parameters_offset());
1349 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1350
1351
1352 // get parameter size (always needed)
1353 __ movptr(rdx, constMethod);
1354 __ load_unsigned_short(rcx, size_of_parameters);
1355
1356 // rbx: Method*
1357 // rcx: size of parameters
1358 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1359
1360 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1361 __ subl(rdx, rcx); // rdx = no. of additional locals
1362
1363 // YYY
1364 // __ incrementl(rdx);
1365 // __ andl(rdx, -2);
1366
1367 // see if we've got enough room on the stack for locals plus overhead.
1368 generate_stack_overflow_check();
1369
1370 // get return address
1371 __ pop(rax);
1372
1373 // compute beginning of parameters
1374 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1375
1376 // rdx - # of additional locals
1377 // allocate space for locals
1378 // explicitly initialize locals
1379 {
1380 Label exit, loop;
1381 __ testl(rdx, rdx);
1382 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1383 __ bind(loop);
1384 __ push((int) NULL_WORD); // initialize local variables
1385 __ decrementl(rdx); // until everything initialized
1386 __ jcc(Assembler::greater, loop);
1387 __ bind(exit);
1388 }
1389
1390 // initialize fixed part of activation frame
1391 generate_fixed_frame(false);
1392
1393 // make sure method is not native & not abstract
1394 #ifdef ASSERT
1395 __ movl(rax, access_flags);
1396 {
1397 Label L;
1398 __ testl(rax, JVM_ACC_NATIVE);
1399 __ jcc(Assembler::zero, L);
1400 __ stop("tried to execute native method as non-native");
1401 __ bind(L);
1402 }
1403 {
1404 Label L;
1405 __ testl(rax, JVM_ACC_ABSTRACT);
1406 __ jcc(Assembler::zero, L);
1407 __ stop("tried to execute abstract method in interpreter");
1408 __ bind(L);
1409 }
1410 #endif
1411
1412 // Since at this point in the method invocation the exception
1413 // handler would try to exit the monitor of synchronized methods
1414 // which hasn't been entered yet, we set the thread local variable
1415 // _do_not_unlock_if_synchronized to true. The remove_activation
1416 // will check this flag.
1417
1418 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1419 NOT_LP64(__ get_thread(thread));
1420 const Address do_not_unlock_if_synchronized(thread,
1421 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1422 __ movbool(do_not_unlock_if_synchronized, true);
1423
1424 __ profile_parameters_type(rax, rcx, rdx);
1425 // increment invocation count & check for overflow
1426 Label invocation_counter_overflow;
1427 Label profile_method;
1428 Label profile_method_continue;
1429 if (inc_counter) {
1430 generate_counter_incr(&invocation_counter_overflow,
1431 &profile_method,
1432 &profile_method_continue);
1433 if (ProfileInterpreter) {
1434 __ bind(profile_method_continue);
1435 }
1436 }
1437
1438 Label continue_after_compile;
1439 __ bind(continue_after_compile);
1440
1441 // check for synchronized interpreted methods
1442 bang_stack_shadow_pages(false);
1443
1444 // reset the _do_not_unlock_if_synchronized flag
1445 NOT_LP64(__ get_thread(thread));
1446 __ movbool(do_not_unlock_if_synchronized, false);
1447
1448 // check for synchronized methods
1449 // Must happen AFTER invocation_counter check and stack overflow check,
1450 // so method is not locked if overflows.
1451 if (synchronized) {
1452 // Allocate monitor and lock method
1453 lock_method();
1454 } else {
1455 // no synchronization necessary
1456 #ifdef ASSERT
1457 {
1458 Label L;
1459 __ movl(rax, access_flags);
1460 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1461 __ jcc(Assembler::zero, L);
1462 __ stop("method needs synchronization");
1463 __ bind(L);
1464 }
1465 #endif
1466 }
1467
1468 // start execution
1469 #ifdef ASSERT
1470 {
1471 Label L;
1472 const Address monitor_block_top (rbp,
1473 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1474 __ movptr(rax, monitor_block_top);
1475 __ cmpptr(rax, rsp);
1476 __ jcc(Assembler::equal, L);
1477 __ stop("broken stack frame setup in interpreter");
1478 __ bind(L);
1479 }
1480 #endif
1481
1482 // jvmti support
1483 __ notify_method_entry();
1484
1485 __ dispatch_next(vtos);
1486
1487 // invocation counter overflow
1488 if (inc_counter) {
1489 if (ProfileInterpreter) {
1490 // We have decided to profile this method in the interpreter
1491 __ bind(profile_method);
1492 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1493 __ set_method_data_pointer_for_bcp();
1494 __ get_method(rbx);
1495 __ jmp(profile_method_continue);
1496 }
1497 // Handle overflow of counter and compile method
1498 __ bind(invocation_counter_overflow);
1499 generate_counter_overflow(continue_after_compile);
1500 }
1501
1502 return entry_point;
1503 }
1504
1505 //-----------------------------------------------------------------------------
1506 // Exceptions
1507
1508 void TemplateInterpreterGenerator::generate_throw_exception() {
1509 // Entry point in previous activation (i.e., if the caller was
1510 // interpreted)
1511 Interpreter::_rethrow_exception_entry = __ pc();
1512 // Restore sp to interpreter_frame_last_sp even though we are going
1513 // to empty the expression stack for the exception processing.
1514 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1515 // rax: exception
1516 // rdx: return address/pc that threw exception
1517 __ restore_bcp(); // r13/rsi points to call/send
1518 __ restore_locals();
1519 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1520 // Entry point for exceptions thrown within interpreter code
1521 Interpreter::_throw_exception_entry = __ pc();
1522 // expression stack is undefined here
1523 // rax: exception
1524 // r13/rsi: exception bcp
1525 __ verify_oop(rax);
1526 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1527 LP64_ONLY(__ mov(c_rarg1, rax));
1528
1529 // expression stack must be empty before entering the VM in case of
1530 // an exception
1531 __ empty_expression_stack();
1532 // find exception handler address and preserve exception oop
1533 __ call_VM(rdx,
1534 CAST_FROM_FN_PTR(address,
1535 InterpreterRuntime::exception_handler_for_exception),
1536 rarg);
1537 // rax: exception handler entry point
1538 // rdx: preserved exception oop
1539 // r13/rsi: bcp for exception handler
1540 __ push_ptr(rdx); // push exception which is now the only value on the stack
1541 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1542
1543 // If the exception is not handled in the current frame the frame is
1544 // removed and the exception is rethrown (i.e. exception
1545 // continuation is _rethrow_exception).
1546 //
1547 // Note: At this point the bci is still the bxi for the instruction
1548 // which caused the exception and the expression stack is
1549 // empty. Thus, for any VM calls at this point, GC will find a legal
1550 // oop map (with empty expression stack).
1551
1552 // In current activation
1553 // tos: exception
1554 // esi: exception bcp
1555
1556 //
1557 // JVMTI PopFrame support
1558 //
1559
1560 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1561 __ empty_expression_stack();
1562 // Set the popframe_processing bit in pending_popframe_condition
1563 // indicating that we are currently handling popframe, so that
1564 // call_VMs that may happen later do not trigger new popframe
1565 // handling cycles.
1566 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1567 NOT_LP64(__ get_thread(thread));
1568 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1569 __ orl(rdx, JavaThread::popframe_processing_bit);
1570 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1571
1572 {
1573 // Check to see whether we are returning to a deoptimized frame.
1574 // (The PopFrame call ensures that the caller of the popped frame is
1575 // either interpreted or compiled and deoptimizes it if compiled.)
1576 // In this case, we can't call dispatch_next() after the frame is
1577 // popped, but instead must save the incoming arguments and restore
1578 // them after deoptimization has occurred.
1579 //
1580 // Note that we don't compare the return PC against the
1581 // deoptimization blob's unpack entry because of the presence of
1582 // adapter frames in C2.
1583 Label caller_not_deoptimized;
1584 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1585 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1586 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1587 InterpreterRuntime::interpreter_contains), rarg);
1588 __ testl(rax, rax);
1589 __ jcc(Assembler::notZero, caller_not_deoptimized);
1590
1591 // Compute size of arguments for saving when returning to
1592 // deoptimized caller
1593 __ get_method(rax);
1594 __ movptr(rax, Address(rax, Method::const_offset()));
1595 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1596 size_of_parameters_offset())));
1597 __ shll(rax, Interpreter::logStackElementSize);
1598 __ restore_locals();
1599 __ subptr(rlocals, rax);
1600 __ addptr(rlocals, wordSize);
1601 // Save these arguments
1602 NOT_LP64(__ get_thread(thread));
1603 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1604 Deoptimization::
1605 popframe_preserve_args),
1606 thread, rax, rlocals);
1607
1608 __ remove_activation(vtos, rdx,
1609 /* throw_monitor_exception */ false,
1610 /* install_monitor_exception */ false,
1611 /* notify_jvmdi */ false);
1612
1613 // Inform deoptimization that it is responsible for restoring
1614 // these arguments
1615 NOT_LP64(__ get_thread(thread));
1616 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1617 JavaThread::popframe_force_deopt_reexecution_bit);
1618
1619 // Continue in deoptimization handler
1620 __ jmp(rdx);
1621
1622 __ bind(caller_not_deoptimized);
1623 }
1624
1625 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1626 /* throw_monitor_exception */ false,
1627 /* install_monitor_exception */ false,
1628 /* notify_jvmdi */ false);
1629
1630 // Finish with popframe handling
1631 // A previous I2C followed by a deoptimization might have moved the
1632 // outgoing arguments further up the stack. PopFrame expects the
1633 // mutations to those outgoing arguments to be preserved and other
1634 // constraints basically require this frame to look exactly as
1635 // though it had previously invoked an interpreted activation with
1636 // no space between the top of the expression stack (current
1637 // last_sp) and the top of stack. Rather than force deopt to
1638 // maintain this kind of invariant all the time we call a small
1639 // fixup routine to move the mutated arguments onto the top of our
1640 // expression stack if necessary.
1641 #ifndef _LP64
1642 __ mov(rax, rsp);
1643 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1644 __ get_thread(thread);
1645 // PC must point into interpreter here
1646 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1647 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1648 __ get_thread(thread);
1649 #else
1650 __ mov(c_rarg1, rsp);
1651 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1652 // PC must point into interpreter here
1653 __ set_last_Java_frame(noreg, rbp, __ pc());
1654 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1655 #endif
1656 __ reset_last_Java_frame(thread, true);
1657
1658 // Restore the last_sp and null it out
1659 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1660 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1661
1662 __ restore_bcp();
1663 __ restore_locals();
1664 // The method data pointer was incremented already during
1665 // call profiling. We have to restore the mdp for the current bcp.
1666 if (ProfileInterpreter) {
1667 __ set_method_data_pointer_for_bcp();
1668 }
1669
1670 // Clear the popframe condition flag
1671 NOT_LP64(__ get_thread(thread));
1672 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1673 JavaThread::popframe_inactive);
1674
1675 #if INCLUDE_JVMTI
1676 {
1677 Label L_done;
1678 const Register local0 = rlocals;
1679
1680 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1681 __ jcc(Assembler::notEqual, L_done);
1682
1683 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1684 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1685
1686 __ get_method(rdx);
1687 __ movptr(rax, Address(local0, 0));
1688 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1689
1690 __ testptr(rax, rax);
1691 __ jcc(Assembler::zero, L_done);
1692
1693 __ movptr(Address(rbx, 0), rax);
1694 __ bind(L_done);
1695 }
1696 #endif // INCLUDE_JVMTI
1697
1698 __ dispatch_next(vtos);
1699 // end of PopFrame support
1700
1701 Interpreter::_remove_activation_entry = __ pc();
1702
1703 // preserve exception over this code sequence
1704 __ pop_ptr(rax);
1705 NOT_LP64(__ get_thread(thread));
1706 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1707 // remove the activation (without doing throws on illegalMonitorExceptions)
1708 __ remove_activation(vtos, rdx, false, true, false);
1709 // restore exception
1710 NOT_LP64(__ get_thread(thread));
1711 __ get_vm_result(rax, thread);
1712
1713 // In between activations - previous activation type unknown yet
1714 // compute continuation point - the continuation point expects the
1715 // following registers set up:
1716 //
1717 // rax: exception
1718 // rdx: return address/pc that threw exception
1719 // rsp: expression stack of caller
1720 // rbp: ebp of caller
1721 __ push(rax); // save exception
1722 __ push(rdx); // save return address
1723 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1724 SharedRuntime::exception_handler_for_return_address),
1725 thread, rdx);
1726 __ mov(rbx, rax); // save exception handler
1727 __ pop(rdx); // restore return address
1728 __ pop(rax); // restore exception
1729 // Note that an "issuing PC" is actually the next PC after the call
1730 __ jmp(rbx); // jump to exception
1731 // handler of caller
1732 }
1733
1734
1735 //
1736 // JVMTI ForceEarlyReturn support
1737 //
1738 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1739 address entry = __ pc();
1740
1741 __ restore_bcp();
1742 __ restore_locals();
1743 __ empty_expression_stack();
1744 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1745
1746 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1747 NOT_LP64(__ get_thread(thread));
1748 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1749 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1750
1751 // Clear the earlyret state
1752 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1753
1754 __ remove_activation(state, rsi,
1755 false, /* throw_monitor_exception */
1756 false, /* install_monitor_exception */
1757 true); /* notify_jvmdi */
1758 __ jmp(rsi);
1759
1760 return entry;
1761 } // end of ForceEarlyReturn support
1762
1763
1764 //-----------------------------------------------------------------------------
1765 // Helper for vtos entry point generation
1766
1767 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1768 address& bep,
1769 address& cep,
1770 address& sep,
1771 address& aep,
1772 address& iep,
1773 address& lep,
1774 address& fep,
1775 address& dep,
1776 address& vep) {
1777 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1778 Label L;
1779 aep = __ pc(); // atos entry point
1780 __ push_ptr();
1781 __ jmp(L);
1782 #ifndef _LP64
1783 fep = __ pc(); // ftos entry point
1784 __ push(ftos);
1785 __ jmp(L);
1786 dep = __ pc(); // dtos entry point
1787 __ push(dtos);
1788 __ jmp(L);
1789 #else
1790 fep = __ pc(); // ftos entry point
1791 __ push_f(xmm0);
1792 __ jmp(L);
1793 dep = __ pc(); // dtos entry point
1794 __ push_d(xmm0);
1795 __ jmp(L);
1796 #endif // _LP64
1797 lep = __ pc(); // ltos entry point
1798 __ push_l();
1799 __ jmp(L);
1800 bep = cep = sep = iep = __ pc(); // [bcsi]tos entry point
1801 __ push_i();
1802 vep = __ pc(); // vtos entry point
1803 __ bind(L);
1804 generate_and_dispatch(t);
1805 }
1806
1807 //-----------------------------------------------------------------------------
1808
1809 // Non-product code
1810 #ifndef PRODUCT
1811
1812 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1813 address entry = __ pc();
1814
1815 #ifndef _LP64
1816 // prepare expression stack
1817 __ pop(rcx); // pop return address so expression stack is 'pure'
1818 __ push(state); // save tosca
1819
1820 // pass tosca registers as arguments & call tracer
1821 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1822 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1823 __ pop(state); // restore tosca
1824
1825 // return
1826 __ jmp(rcx);
1827 #else
1828 __ push(state);
1829 __ push(c_rarg0);
1830 __ push(c_rarg1);
1831 __ push(c_rarg2);
1832 __ push(c_rarg3);
1833 __ mov(c_rarg2, rax); // Pass itos
1834 #ifdef _WIN64
1835 __ movflt(xmm3, xmm0); // Pass ftos
1836 #endif
1837 __ call_VM(noreg,
1838 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1839 c_rarg1, c_rarg2, c_rarg3);
1840 __ pop(c_rarg3);
1841 __ pop(c_rarg2);
1842 __ pop(c_rarg1);
1843 __ pop(c_rarg0);
1844 __ pop(state);
1845 __ ret(0); // return from result handler
1846 #endif // _LP64
1847
1848 return entry;
1849 }
1850
1851 void TemplateInterpreterGenerator::count_bytecode() {
1852 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1853 }
1854
1855 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1856 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1857 }
1858
1859 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1860 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1861 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1862 __ orl(rbx,
1863 ((int) t->bytecode()) <<
1864 BytecodePairHistogram::log2_number_of_codes);
1865 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1866 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1867 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1868 }
1869
1870
1871 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1872 // Call a little run-time stub to avoid blow-up for each bytecode.
1873 // The run-time runtime saves the right registers, depending on
1874 // the tosca in-state for the given template.
1875
1876 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1877 "entry must have been generated");
1878 #ifndef _LP64
1879 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1880 #else
1881 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1882 __ andptr(rsp, -16); // align stack as required by ABI
1883 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1884 __ mov(rsp, r12); // restore sp
1885 __ reinit_heapbase();
1886 #endif // _LP64
1887 }
1888
1889
1890 void TemplateInterpreterGenerator::stop_interpreter_at() {
1891 Label L;
1892 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1893 StopInterpreterAt);
1894 __ jcc(Assembler::notEqual, L);
1895 __ int3();
1896 __ bind(L);
1897 }
1898 #endif // !PRODUCT