1 /*
2 * Copyright (c) 2003, 2022, 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 "classfile/javaClasses.hpp"
28 #include "compiler/compiler_globals.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc/shared/barrierSetAssembler.hpp"
31 #include "interpreter/bytecodeHistogram.hpp"
32 #include "interpreter/interp_masm.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/templateInterpreterGenerator.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "oops/arrayOop.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/method.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "oops/inlineKlass.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiThreadState.hpp"
44 #include "runtime/continuation.hpp"
45 #include "runtime/deoptimization.hpp"
46 #include "runtime/frame.inline.hpp"
47 #include "runtime/globals.hpp"
48 #include "runtime/jniHandles.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "runtime/stubRoutines.hpp"
51 #include "runtime/synchronizer.hpp"
52 #include "runtime/timer.hpp"
53 #include "runtime/vframeArray.hpp"
54 #include "utilities/debug.hpp"
55 #include "utilities/macros.hpp"
56
57 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
58
59 // Size of interpreter code. Increase if too small. Interpreter will
60 // fail with a guarantee ("not enough space for interpreter generation");
61 // if too small.
62 // Run with +PrintInterpreter to get the VM to print out the size.
63 // Max size with JVMTI
64 #ifdef AMD64
65 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(280) NOT_JVMCI(268) * 1024;
66 #else
67 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
68 #endif // AMD64
69
70 // Global Register Names
71 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
72 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
73
74 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
75 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
76 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
77
78
79 //-----------------------------------------------------------------------------
80
81 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
82 address entry = __ pc();
83
84 #ifdef ASSERT
85 {
86 Label L;
87 __ lea(rax, Address(rbp,
88 frame::interpreter_frame_monitor_block_top_offset *
89 wordSize));
90 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
91 // grows negative)
92 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
93 __ stop ("interpreter frame not set up");
94 __ bind(L);
95 }
96 #endif // ASSERT
97 // Restore bcp under the assumption that the current frame is still
98 // interpreted
99 __ restore_bcp();
100
101 // expression stack must be empty before entering the VM if an
102 // exception happened
103 __ empty_expression_stack();
104 // throw exception
105 __ call_VM(noreg,
106 CAST_FROM_FN_PTR(address,
107 InterpreterRuntime::throw_StackOverflowError));
108 return entry;
109 }
110
111 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
112 address entry = __ pc();
113 // The expression stack must be empty before entering the VM if an
114 // exception happened.
115 __ empty_expression_stack();
116
117 // Setup parameters.
118 // ??? convention: expect aberrant index in register ebx/rbx.
119 // Pass array to create more detailed exceptions.
120 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
121 __ call_VM(noreg,
122 CAST_FROM_FN_PTR(address,
123 InterpreterRuntime::
124 throw_ArrayIndexOutOfBoundsException),
125 rarg, rbx);
126 return entry;
127 }
128
129 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
130 address entry = __ pc();
131
132 // object is at TOS
133 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
134 __ pop(rarg);
135
136 // expression stack must be empty before entering the VM if an
137 // exception happened
138 __ empty_expression_stack();
139
140 __ call_VM(noreg,
141 CAST_FROM_FN_PTR(address,
142 InterpreterRuntime::
143 throw_ClassCastException),
144 rarg);
145 return entry;
146 }
147
148 address TemplateInterpreterGenerator::generate_exception_handler_common(
149 const char* name, const char* message, bool pass_oop) {
150 assert(!pass_oop || message == NULL, "either oop or message but not both");
151 address entry = __ pc();
152
153 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
154 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
155
156 if (pass_oop) {
157 // object is at TOS
158 __ pop(rarg2);
159 }
160 // expression stack must be empty before entering the VM if an
161 // exception happened
162 __ empty_expression_stack();
163 // setup parameters
164 __ lea(rarg, ExternalAddress((address)name));
165 if (pass_oop) {
166 __ call_VM(rax, CAST_FROM_FN_PTR(address,
167 InterpreterRuntime::
168 create_klass_exception),
169 rarg, rarg2);
170 } else {
171 __ lea(rarg2, ExternalAddress((address)message));
172 __ call_VM(rax,
173 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
174 rarg, rarg2);
175 }
176 // throw exception
177 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
178 return entry;
179 }
180
181 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
182 address entry = __ pc();
183
184 #ifndef _LP64
185 #ifdef COMPILER2
186 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
187 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
188 for (int i = 1; i < 8; i++) {
189 __ ffree(i);
190 }
191 } else if (UseSSE < 2) {
192 __ empty_FPU_stack();
193 }
194 #endif // COMPILER2
195 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
196 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
197 } else {
198 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
199 }
200
201 if (state == ftos) {
202 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
203 } else if (state == dtos) {
204 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
205 }
206 #endif // _LP64
207
208 // Restore stack bottom in case i2c adjusted stack
209 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
210 // and NULL it as marker that esp is now tos until next java call
211 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
212
213 if (state == atos && InlineTypeReturnedAsFields) {
214 __ store_inline_type_fields_to_buf(NULL);
215 }
216
217 __ restore_bcp();
218 __ restore_locals();
219
220 if (state == atos) {
221 Register mdp = rbx;
222 Register tmp = rcx;
223 __ profile_return_type(mdp, rax, tmp);
224 }
225
226 const Register cache = rbx;
227 const Register index = rcx;
228 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
229
230 const Register flags = cache;
231 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
232 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
233 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
234
235 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
236 if (JvmtiExport::can_pop_frame()) {
237 NOT_LP64(__ get_thread(java_thread));
238 __ check_and_handle_popframe(java_thread);
239 }
240 if (JvmtiExport::can_force_early_return()) {
241 NOT_LP64(__ get_thread(java_thread));
242 __ check_and_handle_earlyret(java_thread);
243 }
244
245 __ dispatch_next(state, step);
246
247 return entry;
248 }
249
250
251 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
252 address entry = __ pc();
253
254 #ifndef _LP64
255 if (state == ftos) {
256 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
257 } else if (state == dtos) {
258 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
259 }
260 #endif // _LP64
261
262 // NULL last_sp until next java call
263 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
264 __ restore_bcp();
265 __ restore_locals();
266 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
267 NOT_LP64(__ get_thread(thread));
268 #if INCLUDE_JVMCI
269 // Check if we need to take lock at entry of synchronized method. This can
270 // only occur on method entry so emit it only for vtos with step 0.
271 if (EnableJVMCI && state == vtos && step == 0) {
272 Label L;
273 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
274 __ jcc(Assembler::zero, L);
275 // Clear flag.
276 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
277 // Satisfy calling convention for lock_method().
278 __ get_method(rbx);
279 // Take lock.
280 lock_method();
281 __ bind(L);
282 } else {
283 #ifdef ASSERT
284 if (EnableJVMCI) {
285 Label L;
286 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
287 __ jcc(Assembler::zero, L);
288 __ stop("unexpected pending monitor in deopt entry");
289 __ bind(L);
290 }
291 #endif
292 }
293 #endif
294 // handle exceptions
295 {
296 Label L;
297 __ cmpptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
298 __ jcc(Assembler::zero, L);
299 __ call_VM(noreg,
300 CAST_FROM_FN_PTR(address,
301 InterpreterRuntime::throw_pending_exception));
302 __ should_not_reach_here();
303 __ bind(L);
304 }
305 if (continuation == NULL) {
306 __ dispatch_next(state, step);
307 } else {
308 __ jump_to_entry(continuation);
309 }
310 return entry;
311 }
312
313 address TemplateInterpreterGenerator::generate_result_handler_for(
314 BasicType type) {
315 address entry = __ pc();
316 switch (type) {
317 case T_BOOLEAN: __ c2bool(rax); break;
318 #ifndef _LP64
319 case T_CHAR : __ andptr(rax, 0xFFFF); break;
320 #else
321 case T_CHAR : __ movzwl(rax, rax); break;
322 #endif // _LP64
323 case T_BYTE : __ sign_extend_byte(rax); break;
324 case T_SHORT : __ sign_extend_short(rax); break;
325 case T_INT : /* nothing to do */ break;
326 case T_LONG : /* nothing to do */ break;
327 case T_VOID : /* nothing to do */ break;
328 #ifndef _LP64
329 case T_DOUBLE :
330 case T_FLOAT :
331 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
332 __ pop(t); // remove return address first
333 // Must return a result for interpreter or compiler. In SSE
334 // mode, results are returned in xmm0 and the FPU stack must
335 // be empty.
336 if (type == T_FLOAT && UseSSE >= 1) {
337 // Load ST0
338 __ fld_d(Address(rsp, 0));
339 // Store as float and empty fpu stack
340 __ fstp_s(Address(rsp, 0));
341 // and reload
342 __ movflt(xmm0, Address(rsp, 0));
343 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
344 __ movdbl(xmm0, Address(rsp, 0));
345 } else {
346 // restore ST0
347 __ fld_d(Address(rsp, 0));
348 }
349 // and pop the temp
350 __ addptr(rsp, 2 * wordSize);
351 __ push(t); // restore return address
352 }
353 break;
354 #else
355 case T_FLOAT : /* nothing to do */ break;
356 case T_DOUBLE : /* nothing to do */ break;
357 #endif // _LP64
358
359 case T_PRIMITIVE_OBJECT: // fall through (inline types are handled with oops)
360 case T_OBJECT :
361 // retrieve result from frame
362 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
363 // and verify it
364 __ verify_oop(rax);
365 break;
366 default : ShouldNotReachHere();
367 }
368 __ ret(0); // return from result handler
369 return entry;
370 }
371
372 address TemplateInterpreterGenerator::generate_safept_entry_for(
373 TosState state,
374 address runtime_entry) {
375 address entry = __ pc();
376
377 __ push(state);
378 __ push_cont_fastpath();
379 __ call_VM(noreg, runtime_entry);
380 __ pop_cont_fastpath();
381
382 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
383 return entry;
384 }
385
386
387
388 // Helpers for commoning out cases in the various type of method entries.
389 //
390
391
392 // increment invocation count & check for overflow
393 //
394 // Note: checking for negative value instead of overflow
395 // so we have a 'sticky' overflow test
396 //
397 // rbx: method
398 // rcx: invocation counter
399 //
400 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow) {
401 Label done;
402 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
403 Label no_mdo;
404 if (ProfileInterpreter) {
405 // Are we profiling?
406 __ movptr(rax, Address(rbx, Method::method_data_offset()));
407 __ testptr(rax, rax);
408 __ jccb(Assembler::zero, no_mdo);
409 // Increment counter in the MDO
410 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
411 in_bytes(InvocationCounter::counter_offset()));
412 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
413 __ increment_mask_and_jump(mdo_invocation_counter, mask, rcx, overflow);
414 __ jmp(done);
415 }
416 __ bind(no_mdo);
417 // Increment counter in MethodCounters
418 const Address invocation_counter(rax,
419 MethodCounters::invocation_counter_offset() +
420 InvocationCounter::counter_offset());
421 __ get_method_counters(rbx, rax, done);
422 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
423 __ increment_mask_and_jump(invocation_counter, mask, rcx, overflow);
424 __ bind(done);
425 }
426
427 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
428
429 // Asm interpreter on entry
430 // r14/rdi - locals
431 // r13/rsi - bcp
432 // rbx - method
433 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
434 // rbp - interpreter frame
435
436 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
437 // Everything as it was on entry
438 // rdx is not restored. Doesn't appear to really be set.
439
440 // InterpreterRuntime::frequency_counter_overflow takes two
441 // arguments, the first (thread) is passed by call_VM, the second
442 // indicates if the counter overflow occurs at a backwards branch
443 // (NULL bcp). We pass zero for it. The call returns the address
444 // of the verified entry point for the method or NULL if the
445 // compilation did not complete (either went background or bailed
446 // out).
447 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
448 __ movl(rarg, 0);
449 __ call_VM(noreg,
450 CAST_FROM_FN_PTR(address,
451 InterpreterRuntime::frequency_counter_overflow),
452 rarg);
453
454 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
455 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
456 // and jump to the interpreted entry.
457 __ jmp(do_continue, relocInfo::none);
458 }
459
460 // See if we've got enough room on the stack for locals plus overhead below
461 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
462 // without going through the signal handler, i.e., reserved and yellow zones
463 // will not be made usable. The shadow zone must suffice to handle the
464 // overflow.
465 // The expression stack grows down incrementally, so the normal guard
466 // page mechanism will work for that.
467 //
468 // NOTE: Since the additional locals are also always pushed (wasn't
469 // obvious in generate_fixed_frame) so the guard should work for them
470 // too.
471 //
472 // Args:
473 // rdx: number of additional locals this frame needs (what we must check)
474 // rbx: Method*
475 //
476 // Kills:
477 // rax
478 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
479
480 // monitor entry size: see picture of stack in frame_x86.hpp
481 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
482
483 // total overhead size: entry_size + (saved rbp through expr stack
484 // bottom). be sure to change this if you add/subtract anything
485 // to/from the overhead area
486 const int overhead_size =
487 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
488
489 const int page_size = os::vm_page_size();
490
491 Label after_frame_check;
492
493 // see if the frame is greater than one page in size. If so,
494 // then we need to verify there is enough stack space remaining
495 // for the additional locals.
496 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
497 __ jcc(Assembler::belowEqual, after_frame_check);
498
499 // compute rsp as if this were going to be the last frame on
500 // the stack before the red zone
501
502 Label after_frame_check_pop;
503 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
504 #ifndef _LP64
505 __ push(thread);
506 __ get_thread(thread);
507 #endif
508
509 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
510
511 // locals + overhead, in bytes
512 __ mov(rax, rdx);
513 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
514 __ addptr(rax, overhead_size);
515
516 #ifdef ASSERT
517 Label limit_okay;
518 // Verify that thread stack overflow limit is non-zero.
519 __ cmpptr(stack_limit, NULL_WORD);
520 __ jcc(Assembler::notEqual, limit_okay);
521 __ stop("stack overflow limit is zero");
522 __ bind(limit_okay);
523 #endif
524
525 // Add locals/frame size to stack limit.
526 __ addptr(rax, stack_limit);
527
528 // Check against the current stack bottom.
529 __ cmpptr(rsp, rax);
530
531 __ jcc(Assembler::above, after_frame_check_pop);
532 NOT_LP64(__ pop(rsi)); // get saved bcp
533
534 // Restore sender's sp as SP. This is necessary if the sender's
535 // frame is an extended compiled frame (see gen_c2i_adapter())
536 // and safer anyway in case of JSR292 adaptations.
537
538 __ pop(rax); // return address must be moved if SP is changed
539 __ mov(rsp, rbcp);
540 __ push(rax);
541
542 // Note: the restored frame is not necessarily interpreted.
543 // Use the shared runtime version of the StackOverflowError.
544 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
545 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
546 // all done with frame size check
547 __ bind(after_frame_check_pop);
548 NOT_LP64(__ pop(rsi));
549
550 // all done with frame size check
551 __ bind(after_frame_check);
552 }
553
554 // Allocate monitor and lock method (asm interpreter)
555 //
556 // Args:
557 // rbx: Method*
558 // r14/rdi: locals
559 //
560 // Kills:
561 // rax
562 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
563 // rscratch1, rscratch2 (scratch regs)
564 void TemplateInterpreterGenerator::lock_method() {
565 // synchronize method
566 const Address access_flags(rbx, Method::access_flags_offset());
567 const Address monitor_block_top(
568 rbp,
569 frame::interpreter_frame_monitor_block_top_offset * wordSize);
570 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
571
572 #ifdef ASSERT
573 {
574 Label L;
575 __ movl(rax, access_flags);
576 __ testl(rax, JVM_ACC_SYNCHRONIZED);
577 __ jcc(Assembler::notZero, L);
578 __ stop("method doesn't need synchronization");
579 __ bind(L);
580 }
581 #endif // ASSERT
582
583 // get synchronization object
584 {
585 Label done;
586 __ movl(rax, access_flags);
587 __ testl(rax, JVM_ACC_STATIC);
588 // get receiver (assume this is frequent case)
589 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
590 __ jcc(Assembler::zero, done);
591 __ load_mirror(rax, rbx, rscratch2);
592
593 #ifdef ASSERT
594 {
595 Label L;
596 __ testptr(rax, rax);
597 __ jcc(Assembler::notZero, L);
598 __ stop("synchronization object is NULL");
599 __ bind(L);
600 }
601 #endif // ASSERT
602
603 __ bind(done);
604 }
605
606 // add space for monitor & lock
607 __ subptr(rsp, entry_size); // add space for a monitor entry
608 __ movptr(monitor_block_top, rsp); // set new monitor block top
609 // store object
610 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
611 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
612 __ movptr(lockreg, rsp); // object address
613 __ lock_object(lockreg);
614 }
615
616 // Generate a fixed interpreter frame. This is identical setup for
617 // interpreted methods and for native methods hence the shared code.
618 //
619 // Args:
620 // rax: return address
621 // rbx: Method*
622 // r14/rdi: pointer to locals
623 // r13/rsi: sender sp
624 // rdx: cp cache
625 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
626 // initialize fixed part of activation frame
627 __ push(rax); // save return address
628 __ enter(); // save old & set new rbp
629 __ push(rbcp); // set sender sp
630 __ push(NULL_WORD); // leave last_sp as null
631 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
632 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
633 __ push(rbx); // save Method*
634 // Get mirror and store it in the frame as GC root for this Method*
635 __ load_mirror(rdx, rbx, rscratch2);
636 __ push(rdx);
637 if (ProfileInterpreter) {
638 Label method_data_continue;
639 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
640 __ testptr(rdx, rdx);
641 __ jcc(Assembler::zero, method_data_continue);
642 __ addptr(rdx, in_bytes(MethodData::data_offset()));
643 __ bind(method_data_continue);
644 __ push(rdx); // set the mdp (method data pointer)
645 } else {
646 __ push(0);
647 }
648
649 __ movptr(rdx, Address(rbx, Method::const_offset()));
650 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
651 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
652 __ push(rdx); // set constant pool cache
653 __ push(rlocals); // set locals pointer
654 if (native_call) {
655 __ push(0); // no bcp
656 } else {
657 __ push(rbcp); // set bcp
658 }
659 __ push(0); // reserve word for pointer to expression stack bottom
660 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
661 }
662
663 // End of helpers
664
665 // Method entry for java.lang.ref.Reference.get.
666 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
667 // Code: _aload_0, _getfield, _areturn
668 // parameter size = 1
669 //
670 // The code that gets generated by this routine is split into 2 parts:
671 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load,
672 // 2. The slow path - which is an expansion of the regular method entry.
673 //
674 // Notes:-
675 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed.
676 // * We may jump to the slow path iff the receiver is null. If the
677 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load
678 // Thus we can use the regular method entry code to generate the NPE.
679 //
680 // rbx: Method*
681
682 // r13: senderSP must preserve for slow path, set SP to it on fast path
683
684 address entry = __ pc();
685
686 const int referent_offset = java_lang_ref_Reference::referent_offset();
687
688 Label slow_path;
689 // rbx: method
690
691 // Check if local 0 != NULL
692 // If the receiver is null then it is OK to jump to the slow path.
693 __ movptr(rax, Address(rsp, wordSize));
694
695 __ testptr(rax, rax);
696 __ jcc(Assembler::zero, slow_path);
697
698 // rax: local 0
699 // rbx: method (but can be used as scratch now)
700 // rdx: scratch
701 // rdi: scratch
702
703 // Preserve the sender sp in case the load barrier
704 // calls the runtime
705 NOT_LP64(__ push(rsi));
706
707 // Load the value of the referent field.
708 const Address field_address(rax, referent_offset);
709 __ load_heap_oop(rax, field_address, /*tmp1*/ rbx, /*tmp_thread*/ rdx, ON_WEAK_OOP_REF);
710
711 // _areturn
712 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
713 NOT_LP64(__ pop(rsi)); // get sender sp
714 __ pop(rdi); // get return address
715 __ mov(rsp, sender_sp); // set sp to sender sp
716 __ jmp(rdi);
717 __ ret(0);
718
719 // generate a vanilla interpreter entry as the slow path
720 __ bind(slow_path);
721 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
722 return entry;
723 }
724
725 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
726 // See more discussion in stackOverflow.hpp.
727
728 // Note that we do the banging after the frame is setup, since the exception
729 // handling code expects to find a valid interpreter frame on the stack.
730 // Doing the banging earlier fails if the caller frame is not an interpreter
731 // frame.
732 // (Also, the exception throwing code expects to unlock any synchronized
733 // method receiver, so do the banging after locking the receiver.)
734
735 const int shadow_zone_size = checked_cast<int>(StackOverflow::stack_shadow_zone_size());
736 const int page_size = os::vm_page_size();
737 const int n_shadow_pages = shadow_zone_size / page_size;
738
739 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
740 #ifndef _LP64
741 __ push(thread);
742 __ get_thread(thread);
743 #endif
744
745 #ifdef ASSERT
746 Label L_good_limit;
747 __ cmpptr(Address(thread, JavaThread::shadow_zone_safe_limit()), NULL_WORD);
748 __ jcc(Assembler::notEqual, L_good_limit);
749 __ stop("shadow zone safe limit is not initialized");
750 __ bind(L_good_limit);
751
752 Label L_good_watermark;
753 __ cmpptr(Address(thread, JavaThread::shadow_zone_growth_watermark()), NULL_WORD);
754 __ jcc(Assembler::notEqual, L_good_watermark);
755 __ stop("shadow zone growth watermark is not initialized");
756 __ bind(L_good_watermark);
757 #endif
758
759 Label L_done;
760
761 __ cmpptr(rsp, Address(thread, JavaThread::shadow_zone_growth_watermark()));
762 __ jcc(Assembler::above, L_done);
763
764 for (int p = 1; p <= n_shadow_pages; p++) {
765 __ bang_stack_with_offset(p*page_size);
766 }
767
768 // Record the new watermark, but only if update is above the safe limit.
769 // Otherwise, the next time around the check above would pass the safe limit.
770 __ cmpptr(rsp, Address(thread, JavaThread::shadow_zone_safe_limit()));
771 __ jccb(Assembler::belowEqual, L_done);
772 __ movptr(Address(thread, JavaThread::shadow_zone_growth_watermark()), rsp);
773
774 __ bind(L_done);
775
776 #ifndef _LP64
777 __ pop(thread);
778 #endif
779 }
780
781 // Interpreter stub for calling a native method. (asm interpreter)
782 // This sets up a somewhat different looking stack for calling the
783 // native method than the typical interpreter frame setup.
784 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
785 // determine code generation flags
786 bool inc_counter = UseCompiler || CountCompiledCalls;
787
788 // rbx: Method*
789 // rbcp: sender sp
790
791 address entry_point = __ pc();
792
793 const Address constMethod (rbx, Method::const_offset());
794 const Address access_flags (rbx, Method::access_flags_offset());
795 const Address size_of_parameters(rcx, ConstMethod::
796 size_of_parameters_offset());
797
798
799 // get parameter size (always needed)
800 __ movptr(rcx, constMethod);
801 __ load_unsigned_short(rcx, size_of_parameters);
802
803 // native calls don't need the stack size check since they have no
804 // expression stack and the arguments are already on the stack and
805 // we only add a handful of words to the stack
806
807 // rbx: Method*
808 // rcx: size of parameters
809 // rbcp: sender sp
810 __ pop(rax); // get return address
811
812 // for natives the size of locals is zero
813
814 // compute beginning of parameters
815 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
816
817 // add 2 zero-initialized slots for native calls
818 // initialize result_handler slot
819 __ push(NULL_WORD);
820 // slot for oop temp
821 // (static native method holder mirror/jni oop result)
822 __ push(NULL_WORD);
823
824 // initialize fixed part of activation frame
825 generate_fixed_frame(true);
826
827 // make sure method is native & not abstract
828 #ifdef ASSERT
829 __ movl(rax, access_flags);
830 {
831 Label L;
832 __ testl(rax, JVM_ACC_NATIVE);
833 __ jcc(Assembler::notZero, L);
834 __ stop("tried to execute non-native method as native");
835 __ bind(L);
836 }
837 {
838 Label L;
839 __ testl(rax, JVM_ACC_ABSTRACT);
840 __ jcc(Assembler::zero, L);
841 __ stop("tried to execute abstract method in interpreter");
842 __ bind(L);
843 }
844 #endif
845
846 // Since at this point in the method invocation the exception handler
847 // would try to exit the monitor of synchronized methods which hasn't
848 // been entered yet, we set the thread local variable
849 // _do_not_unlock_if_synchronized to true. The remove_activation will
850 // check this flag.
851
852 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
853 NOT_LP64(__ get_thread(thread1));
854 const Address do_not_unlock_if_synchronized(thread1,
855 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
856 __ movbool(do_not_unlock_if_synchronized, true);
857
858 // increment invocation count & check for overflow
859 Label invocation_counter_overflow;
860 if (inc_counter) {
861 generate_counter_incr(&invocation_counter_overflow);
862 }
863
864 Label continue_after_compile;
865 __ bind(continue_after_compile);
866
867 bang_stack_shadow_pages(true);
868
869 // reset the _do_not_unlock_if_synchronized flag
870 NOT_LP64(__ get_thread(thread1));
871 __ movbool(do_not_unlock_if_synchronized, false);
872
873 // check for synchronized methods
874 // Must happen AFTER invocation_counter check and stack overflow check,
875 // so method is not locked if overflows.
876 if (synchronized) {
877 lock_method();
878 } else {
879 // no synchronization necessary
880 #ifdef ASSERT
881 {
882 Label L;
883 __ movl(rax, access_flags);
884 __ testl(rax, JVM_ACC_SYNCHRONIZED);
885 __ jcc(Assembler::zero, L);
886 __ stop("method needs synchronization");
887 __ bind(L);
888 }
889 #endif
890 }
891
892 // start execution
893 #ifdef ASSERT
894 {
895 Label L;
896 const Address monitor_block_top(rbp,
897 frame::interpreter_frame_monitor_block_top_offset * wordSize);
898 __ movptr(rax, monitor_block_top);
899 __ cmpptr(rax, rsp);
900 __ jcc(Assembler::equal, L);
901 __ stop("broken stack frame setup in interpreter 5");
902 __ bind(L);
903 }
904 #endif
905
906 // jvmti support
907 __ notify_method_entry();
908
909 // work registers
910 const Register method = rbx;
911 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
912 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
913
914 // allocate space for parameters
915 __ get_method(method);
916 __ movptr(t, Address(method, Method::const_offset()));
917 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
918
919 #ifndef _LP64
920 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
921 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
922 __ subptr(rsp, t);
923 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
924 #else
925 __ shll(t, Interpreter::logStackElementSize);
926
927 __ subptr(rsp, t);
928 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
929 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
930 #endif // _LP64
931
932 // get signature handler
933 {
934 Label L;
935 __ movptr(t, Address(method, Method::signature_handler_offset()));
936 __ testptr(t, t);
937 __ jcc(Assembler::notZero, L);
938 __ call_VM(noreg,
939 CAST_FROM_FN_PTR(address,
940 InterpreterRuntime::prepare_native_call),
941 method);
942 __ get_method(method);
943 __ movptr(t, Address(method, Method::signature_handler_offset()));
944 __ bind(L);
945 }
946
947 // call signature handler
948 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
949 "adjust this code");
950 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
951 "adjust this code");
952 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
953 "adjust this code");
954
955 // The generated handlers do not touch RBX (the method).
956 // However, large signatures cannot be cached and are generated
957 // each time here. The slow-path generator can do a GC on return,
958 // so we must reload it after the call.
959 __ call(t);
960 __ get_method(method); // slow path can do a GC, reload RBX
961
962
963 // result handler is in rax
964 // set result handler
965 __ movptr(Address(rbp,
966 (frame::interpreter_frame_result_handler_offset) * wordSize),
967 rax);
968
969 // pass mirror handle if static call
970 {
971 Label L;
972 __ movl(t, Address(method, Method::access_flags_offset()));
973 __ testl(t, JVM_ACC_STATIC);
974 __ jcc(Assembler::zero, L);
975 // get mirror
976 __ load_mirror(t, method, rax);
977 // copy mirror into activation frame
978 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
979 t);
980 // pass handle to mirror
981 #ifndef _LP64
982 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
983 __ movptr(Address(rsp, wordSize), t);
984 #else
985 __ lea(c_rarg1,
986 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
987 #endif // _LP64
988 __ bind(L);
989 }
990
991 // get native function entry point
992 {
993 Label L;
994 __ movptr(rax, Address(method, Method::native_function_offset()));
995 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
996 __ cmpptr(rax, unsatisfied.addr(), rscratch1);
997 __ jcc(Assembler::notEqual, L);
998 __ call_VM(noreg,
999 CAST_FROM_FN_PTR(address,
1000 InterpreterRuntime::prepare_native_call),
1001 method);
1002 __ get_method(method);
1003 __ movptr(rax, Address(method, Method::native_function_offset()));
1004 __ bind(L);
1005 }
1006
1007 // pass JNIEnv
1008 #ifndef _LP64
1009 __ get_thread(thread);
1010 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1011 __ movptr(Address(rsp, 0), t);
1012
1013 // set_last_Java_frame_before_call
1014 // It is enough that the pc()
1015 // points into the right code segment. It does not have to be the correct return pc.
1016 __ set_last_Java_frame(thread, noreg, rbp, __ pc(), noreg);
1017 #else
1018 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1019
1020 // It is enough that the pc() points into the right code
1021 // segment. It does not have to be the correct return pc.
1022 __ set_last_Java_frame(rsp, rbp, (address) __ pc(), rscratch1);
1023 #endif // _LP64
1024
1025 // change thread state
1026 #ifdef ASSERT
1027 {
1028 Label L;
1029 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1030 __ cmpl(t, _thread_in_Java);
1031 __ jcc(Assembler::equal, L);
1032 __ stop("Wrong thread state in native stub");
1033 __ bind(L);
1034 }
1035 #endif
1036
1037 // Change state to native
1038
1039 __ movl(Address(thread, JavaThread::thread_state_offset()),
1040 _thread_in_native);
1041
1042 // Call the native method.
1043 __ call(rax);
1044 // 32: result potentially in rdx:rax or ST0
1045 // 64: result potentially in rax or xmm0
1046
1047 // Verify or restore cpu control state after JNI call
1048 __ restore_cpu_control_state_after_jni(rscratch1);
1049
1050 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1051 // in order to extract the result of a method call. If the order of these
1052 // pushes change or anything else is added to the stack then the code in
1053 // interpreter_frame_result must also change.
1054
1055 #ifndef _LP64
1056 // save potential result in ST(0) & rdx:rax
1057 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1058 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1059 // It is safe to do this push because state is _thread_in_native and return address will be found
1060 // via _last_native_pc and not via _last_jave_sp
1061
1062 // NOTE: the order of these push(es) is known to frame::interpreter_frame_result.
1063 // If the order changes or anything else is added to the stack the code in
1064 // interpreter_frame_result will have to be changed.
1065
1066 { Label L;
1067 Label push_double;
1068 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1069 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1070 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1071 float_handler.addr(), noreg);
1072 __ jcc(Assembler::equal, push_double);
1073 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1074 double_handler.addr(), noreg);
1075 __ jcc(Assembler::notEqual, L);
1076 __ bind(push_double);
1077 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1078 __ bind(L);
1079 }
1080 #else
1081 __ push(dtos);
1082 #endif // _LP64
1083
1084 __ push(ltos);
1085
1086 // change thread state
1087 NOT_LP64(__ get_thread(thread));
1088 __ movl(Address(thread, JavaThread::thread_state_offset()),
1089 _thread_in_native_trans);
1090
1091 // Force this write out before the read below
1092 if (!UseSystemMemoryBarrier) {
1093 __ membar(Assembler::Membar_mask_bits(
1094 Assembler::LoadLoad | Assembler::LoadStore |
1095 Assembler::StoreLoad | Assembler::StoreStore));
1096 }
1097 #ifndef _LP64
1098 if (AlwaysRestoreFPU) {
1099 // Make sure the control word is correct.
1100 __ fldcw(ExternalAddress(StubRoutines::x86::addr_fpu_cntrl_wrd_std()));
1101 }
1102 #endif // _LP64
1103
1104 // check for safepoint operation in progress and/or pending suspend requests
1105 {
1106 Label Continue;
1107 Label slow_path;
1108
1109 __ safepoint_poll(slow_path, thread, true /* at_return */, false /* in_nmethod */);
1110
1111 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1112 __ jcc(Assembler::equal, Continue);
1113 __ bind(slow_path);
1114
1115 // Don't use call_VM as it will see a possible pending exception
1116 // and forward it and never return here preventing us from
1117 // clearing _last_native_pc down below. Also can't use
1118 // call_VM_leaf either as it will check to see if r13 & r14 are
1119 // preserved and correspond to the bcp/locals pointers. So we do a
1120 // runtime call by hand.
1121 //
1122 #ifndef _LP64
1123 __ push(thread);
1124 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1125 JavaThread::check_special_condition_for_native_trans)));
1126 __ increment(rsp, wordSize);
1127 __ get_thread(thread);
1128 #else
1129 __ mov(c_rarg0, r15_thread);
1130 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1131 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1132 __ andptr(rsp, -16); // align stack as required by ABI
1133 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1134 __ mov(rsp, r12); // restore sp
1135 __ reinit_heapbase();
1136 #endif // _LP64
1137 __ bind(Continue);
1138 }
1139
1140 // change thread state
1141 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1142
1143 // reset_last_Java_frame
1144 __ reset_last_Java_frame(thread, true);
1145
1146 if (CheckJNICalls) {
1147 // clear_pending_jni_exception_check
1148 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1149 }
1150
1151 // reset handle block
1152 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1153 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD);
1154
1155 // If result is an oop unbox and store it in frame where gc will see it
1156 // and result handler will pick it up
1157
1158 {
1159 Label no_oop;
1160 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1161 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1162 __ jcc(Assembler::notEqual, no_oop);
1163 // retrieve result
1164 __ pop(ltos);
1165 // Unbox oop result, e.g. JNIHandles::resolve value.
1166 __ resolve_jobject(rax /* value */,
1167 thread /* thread */,
1168 t /* tmp */);
1169 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1170 // keep stack depth as expected by pushing oop which will eventually be discarded
1171 __ push(ltos);
1172 __ bind(no_oop);
1173 }
1174
1175
1176 {
1177 Label no_reguard;
1178 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1179 StackOverflow::stack_guard_yellow_reserved_disabled);
1180 __ jcc(Assembler::notEqual, no_reguard);
1181
1182 __ pusha(); // XXX only save smashed registers
1183 #ifndef _LP64
1184 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1185 __ popa();
1186 #else
1187 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1188 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1189 __ andptr(rsp, -16); // align stack as required by ABI
1190 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1191 __ mov(rsp, r12); // restore sp
1192 __ popa(); // XXX only restore smashed registers
1193 __ reinit_heapbase();
1194 #endif // _LP64
1195
1196 __ bind(no_reguard);
1197 }
1198
1199
1200 // The method register is junk from after the thread_in_native transition
1201 // until here. Also can't call_VM until the bcp has been
1202 // restored. Need bcp for throwing exception below so get it now.
1203 __ get_method(method);
1204
1205 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1206 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1207 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1208
1209 // handle exceptions (exception handling will handle unlocking!)
1210 {
1211 Label L;
1212 __ cmpptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
1213 __ jcc(Assembler::zero, L);
1214 // Note: At some point we may want to unify this with the code
1215 // used in call_VM_base(); i.e., we should use the
1216 // StubRoutines::forward_exception code. For now this doesn't work
1217 // here because the rsp is not correctly set at this point.
1218 __ MacroAssembler::call_VM(noreg,
1219 CAST_FROM_FN_PTR(address,
1220 InterpreterRuntime::throw_pending_exception));
1221 __ should_not_reach_here();
1222 __ bind(L);
1223 }
1224
1225 // do unlocking if necessary
1226 {
1227 Label L;
1228 __ movl(t, Address(method, Method::access_flags_offset()));
1229 __ testl(t, JVM_ACC_SYNCHRONIZED);
1230 __ jcc(Assembler::zero, L);
1231 // the code below should be shared with interpreter macro
1232 // assembler implementation
1233 {
1234 Label unlock;
1235 // BasicObjectLock will be first in list, since this is a
1236 // synchronized method. However, need to check that the object
1237 // has not been unlocked by an explicit monitorexit bytecode.
1238 const Address monitor(rbp,
1239 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1240 wordSize - (int)sizeof(BasicObjectLock)));
1241
1242 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1243
1244 // monitor expect in c_rarg1 for slow unlock path
1245 __ lea(regmon, monitor); // address of first monitor
1246
1247 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1248 __ testptr(t, t);
1249 __ jcc(Assembler::notZero, unlock);
1250
1251 // Entry already unlocked, need to throw exception
1252 __ MacroAssembler::call_VM(noreg,
1253 CAST_FROM_FN_PTR(address,
1254 InterpreterRuntime::throw_illegal_monitor_state_exception));
1255 __ should_not_reach_here();
1256
1257 __ bind(unlock);
1258 __ unlock_object(regmon);
1259 }
1260 __ bind(L);
1261 }
1262
1263 // jvmti support
1264 // Note: This must happen _after_ handling/throwing any exceptions since
1265 // the exception handler code notifies the runtime of method exits
1266 // too. If this happens before, method entry/exit notifications are
1267 // not properly paired (was bug - gri 11/22/99).
1268 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1269
1270 // restore potential result in edx:eax, call result handler to
1271 // restore potential result in ST0 & handle result
1272
1273 __ pop(ltos);
1274 LP64_ONLY( __ pop(dtos));
1275
1276 __ movptr(t, Address(rbp,
1277 (frame::interpreter_frame_result_handler_offset) * wordSize));
1278 __ call(t);
1279
1280 // remove activation
1281 __ movptr(t, Address(rbp,
1282 frame::interpreter_frame_sender_sp_offset *
1283 wordSize)); // get sender sp
1284 __ leave(); // remove frame anchor
1285 __ pop(rdi); // get return address
1286 __ mov(rsp, t); // set sp to sender sp
1287 __ jmp(rdi);
1288
1289 if (inc_counter) {
1290 // Handle overflow of counter and compile method
1291 __ bind(invocation_counter_overflow);
1292 generate_counter_overflow(continue_after_compile);
1293 }
1294
1295 return entry_point;
1296 }
1297
1298 // Abstract method entry
1299 // Attempt to execute abstract method. Throw exception
1300 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1301
1302 address entry_point = __ pc();
1303
1304 // abstract method entry
1305
1306 // pop return address, reset last_sp to NULL
1307 __ empty_expression_stack();
1308 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1309 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1310
1311 // throw exception
1312 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), rbx);
1313 // the call_VM checks for exception, so we should never return here.
1314 __ should_not_reach_here();
1315
1316 return entry_point;
1317 }
1318
1319 //
1320 // Generic interpreted method entry to (asm) interpreter
1321 //
1322 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1323 // determine code generation flags
1324 bool inc_counter = UseCompiler || CountCompiledCalls;
1325
1326 // ebx: Method*
1327 // rbcp: sender sp (set in InterpreterMacroAssembler::prepare_to_jump_from_interpreted / generate_call_stub)
1328 address entry_point = __ pc();
1329
1330 const Address constMethod(rbx, Method::const_offset());
1331 const Address access_flags(rbx, Method::access_flags_offset());
1332 const Address size_of_parameters(rdx,
1333 ConstMethod::size_of_parameters_offset());
1334 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1335
1336
1337 // get parameter size (always needed)
1338 __ movptr(rdx, constMethod);
1339 __ load_unsigned_short(rcx, size_of_parameters);
1340
1341 // rbx: Method*
1342 // rcx: size of parameters
1343 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1344
1345 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1346 __ subl(rdx, rcx); // rdx = no. of additional locals
1347
1348 // YYY
1349 // __ incrementl(rdx);
1350 // __ andl(rdx, -2);
1351
1352 // see if we've got enough room on the stack for locals plus overhead.
1353 generate_stack_overflow_check();
1354
1355 // get return address
1356 __ pop(rax);
1357
1358 // compute beginning of parameters
1359 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1360
1361 // rdx - # of additional locals
1362 // allocate space for locals
1363 // explicitly initialize locals
1364 {
1365 Label exit, loop;
1366 __ testl(rdx, rdx);
1367 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1368 __ bind(loop);
1369 __ push(NULL_WORD); // initialize local variables
1370 __ decrementl(rdx); // until everything initialized
1371 __ jcc(Assembler::greater, loop);
1372 __ bind(exit);
1373 }
1374
1375 // initialize fixed part of activation frame
1376 generate_fixed_frame(false);
1377
1378 // make sure method is not native & not abstract
1379 #ifdef ASSERT
1380 __ movl(rax, access_flags);
1381 {
1382 Label L;
1383 __ testl(rax, JVM_ACC_NATIVE);
1384 __ jcc(Assembler::zero, L);
1385 __ stop("tried to execute native method as non-native");
1386 __ bind(L);
1387 }
1388 {
1389 Label L;
1390 __ testl(rax, JVM_ACC_ABSTRACT);
1391 __ jcc(Assembler::zero, L);
1392 __ stop("tried to execute abstract method in interpreter");
1393 __ bind(L);
1394 }
1395 #endif
1396
1397 // Since at this point in the method invocation the exception
1398 // handler would try to exit the monitor of synchronized methods
1399 // which hasn't been entered yet, we set the thread local variable
1400 // _do_not_unlock_if_synchronized to true. The remove_activation
1401 // will check this flag.
1402
1403 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1404 NOT_LP64(__ get_thread(thread));
1405 const Address do_not_unlock_if_synchronized(thread,
1406 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1407 __ movbool(do_not_unlock_if_synchronized, true);
1408
1409 __ profile_parameters_type(rax, rcx, rdx);
1410 // increment invocation count & check for overflow
1411 Label invocation_counter_overflow;
1412 if (inc_counter) {
1413 generate_counter_incr(&invocation_counter_overflow);
1414 }
1415
1416 Label continue_after_compile;
1417 __ bind(continue_after_compile);
1418
1419 // check for synchronized interpreted methods
1420 bang_stack_shadow_pages(false);
1421
1422 // reset the _do_not_unlock_if_synchronized flag
1423 NOT_LP64(__ get_thread(thread));
1424 __ movbool(do_not_unlock_if_synchronized, false);
1425
1426 // check for synchronized methods
1427 // Must happen AFTER invocation_counter check and stack overflow check,
1428 // so method is not locked if overflows.
1429 if (synchronized) {
1430 // Allocate monitor and lock method
1431 lock_method();
1432 } else {
1433 // no synchronization necessary
1434 #ifdef ASSERT
1435 {
1436 Label L;
1437 __ movl(rax, access_flags);
1438 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1439 __ jcc(Assembler::zero, L);
1440 __ stop("method needs synchronization");
1441 __ bind(L);
1442 }
1443 #endif
1444 }
1445
1446 // start execution
1447 #ifdef ASSERT
1448 {
1449 Label L;
1450 const Address monitor_block_top (rbp,
1451 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1452 __ movptr(rax, monitor_block_top);
1453 __ cmpptr(rax, rsp);
1454 __ jcc(Assembler::equal, L);
1455 __ stop("broken stack frame setup in interpreter 6");
1456 __ bind(L);
1457 }
1458 #endif
1459
1460 // jvmti support
1461 __ notify_method_entry();
1462
1463 __ dispatch_next(vtos);
1464
1465 // invocation counter overflow
1466 if (inc_counter) {
1467 // Handle overflow of counter and compile method
1468 __ bind(invocation_counter_overflow);
1469 generate_counter_overflow(continue_after_compile);
1470 }
1471
1472 return entry_point;
1473 }
1474
1475 //-----------------------------------------------------------------------------
1476 // Exceptions
1477
1478 void TemplateInterpreterGenerator::generate_throw_exception() {
1479 // Entry point in previous activation (i.e., if the caller was
1480 // interpreted)
1481 Interpreter::_rethrow_exception_entry = __ pc();
1482 // Restore sp to interpreter_frame_last_sp even though we are going
1483 // to empty the expression stack for the exception processing.
1484 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1485 // rax: exception
1486 // rdx: return address/pc that threw exception
1487 __ restore_bcp(); // r13/rsi points to call/send
1488 __ restore_locals();
1489 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1490 // Entry point for exceptions thrown within interpreter code
1491 Interpreter::_throw_exception_entry = __ pc();
1492 // expression stack is undefined here
1493 // rax: exception
1494 // r13/rsi: exception bcp
1495 __ verify_oop(rax);
1496 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1497 LP64_ONLY(__ mov(c_rarg1, rax));
1498
1499 // expression stack must be empty before entering the VM in case of
1500 // an exception
1501 __ empty_expression_stack();
1502 // find exception handler address and preserve exception oop
1503 __ call_VM(rdx,
1504 CAST_FROM_FN_PTR(address,
1505 InterpreterRuntime::exception_handler_for_exception),
1506 rarg);
1507 // rax: exception handler entry point
1508 // rdx: preserved exception oop
1509 // r13/rsi: bcp for exception handler
1510 __ push_ptr(rdx); // push exception which is now the only value on the stack
1511 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1512
1513 // If the exception is not handled in the current frame the frame is
1514 // removed and the exception is rethrown (i.e. exception
1515 // continuation is _rethrow_exception).
1516 //
1517 // Note: At this point the bci is still the bxi for the instruction
1518 // which caused the exception and the expression stack is
1519 // empty. Thus, for any VM calls at this point, GC will find a legal
1520 // oop map (with empty expression stack).
1521
1522 // In current activation
1523 // tos: exception
1524 // esi: exception bcp
1525
1526 //
1527 // JVMTI PopFrame support
1528 //
1529
1530 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1531 __ empty_expression_stack();
1532 // Set the popframe_processing bit in pending_popframe_condition
1533 // indicating that we are currently handling popframe, so that
1534 // call_VMs that may happen later do not trigger new popframe
1535 // handling cycles.
1536 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1537 NOT_LP64(__ get_thread(thread));
1538 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1539 __ orl(rdx, JavaThread::popframe_processing_bit);
1540 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1541
1542 {
1543 // Check to see whether we are returning to a deoptimized frame.
1544 // (The PopFrame call ensures that the caller of the popped frame is
1545 // either interpreted or compiled and deoptimizes it if compiled.)
1546 // In this case, we can't call dispatch_next() after the frame is
1547 // popped, but instead must save the incoming arguments and restore
1548 // them after deoptimization has occurred.
1549 //
1550 // Note that we don't compare the return PC against the
1551 // deoptimization blob's unpack entry because of the presence of
1552 // adapter frames in C2.
1553 Label caller_not_deoptimized;
1554 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1555 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1556 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1557 InterpreterRuntime::interpreter_contains), rarg);
1558 __ testl(rax, rax);
1559 __ jcc(Assembler::notZero, caller_not_deoptimized);
1560
1561 // Compute size of arguments for saving when returning to
1562 // deoptimized caller
1563 __ get_method(rax);
1564 __ movptr(rax, Address(rax, Method::const_offset()));
1565 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1566 size_of_parameters_offset())));
1567 __ shll(rax, Interpreter::logStackElementSize);
1568 __ restore_locals();
1569 __ subptr(rlocals, rax);
1570 __ addptr(rlocals, wordSize);
1571 // Save these arguments
1572 NOT_LP64(__ get_thread(thread));
1573 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1574 Deoptimization::
1575 popframe_preserve_args),
1576 thread, rax, rlocals);
1577
1578 __ remove_activation(vtos, rdx,
1579 /* throw_monitor_exception */ false,
1580 /* install_monitor_exception */ false,
1581 /* notify_jvmdi */ false);
1582
1583 // Inform deoptimization that it is responsible for restoring
1584 // these arguments
1585 NOT_LP64(__ get_thread(thread));
1586 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1587 JavaThread::popframe_force_deopt_reexecution_bit);
1588
1589 // Continue in deoptimization handler
1590 __ jmp(rdx);
1591
1592 __ bind(caller_not_deoptimized);
1593 }
1594
1595 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1596 /* throw_monitor_exception */ false,
1597 /* install_monitor_exception */ false,
1598 /* notify_jvmdi */ false);
1599
1600 // Finish with popframe handling
1601 // A previous I2C followed by a deoptimization might have moved the
1602 // outgoing arguments further up the stack. PopFrame expects the
1603 // mutations to those outgoing arguments to be preserved and other
1604 // constraints basically require this frame to look exactly as
1605 // though it had previously invoked an interpreted activation with
1606 // no space between the top of the expression stack (current
1607 // last_sp) and the top of stack. Rather than force deopt to
1608 // maintain this kind of invariant all the time we call a small
1609 // fixup routine to move the mutated arguments onto the top of our
1610 // expression stack if necessary.
1611 #ifndef _LP64
1612 __ mov(rax, rsp);
1613 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1614 __ get_thread(thread);
1615 // PC must point into interpreter here
1616 __ set_last_Java_frame(thread, noreg, rbp, __ pc(), noreg);
1617 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1618 __ get_thread(thread);
1619 #else
1620 __ mov(c_rarg1, rsp);
1621 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1622 // PC must point into interpreter here
1623 __ set_last_Java_frame(noreg, rbp, __ pc(), rscratch1);
1624 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1625 #endif
1626 __ reset_last_Java_frame(thread, true);
1627
1628 // Restore the last_sp and null it out
1629 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1630 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1631
1632 __ restore_bcp();
1633 __ restore_locals();
1634 // The method data pointer was incremented already during
1635 // call profiling. We have to restore the mdp for the current bcp.
1636 if (ProfileInterpreter) {
1637 __ set_method_data_pointer_for_bcp();
1638 }
1639
1640 // Clear the popframe condition flag
1641 NOT_LP64(__ get_thread(thread));
1642 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1643 JavaThread::popframe_inactive);
1644
1645 #if INCLUDE_JVMTI
1646 {
1647 Label L_done;
1648 const Register local0 = rlocals;
1649
1650 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1651 __ jcc(Assembler::notEqual, L_done);
1652
1653 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1654 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1655
1656 __ get_method(rdx);
1657 __ movptr(rax, Address(local0, 0));
1658 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1659
1660 __ testptr(rax, rax);
1661 __ jcc(Assembler::zero, L_done);
1662
1663 __ movptr(Address(rbx, 0), rax);
1664 __ bind(L_done);
1665 }
1666 #endif // INCLUDE_JVMTI
1667
1668 __ dispatch_next(vtos);
1669 // end of PopFrame support
1670
1671 Interpreter::_remove_activation_entry = __ pc();
1672
1673 // preserve exception over this code sequence
1674 __ pop_ptr(rax);
1675 NOT_LP64(__ get_thread(thread));
1676 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1677 // remove the activation (without doing throws on illegalMonitorExceptions)
1678 __ remove_activation(vtos, rdx, false, true, false);
1679 // restore exception
1680 NOT_LP64(__ get_thread(thread));
1681 __ get_vm_result(rax, thread);
1682
1683 // In between activations - previous activation type unknown yet
1684 // compute continuation point - the continuation point expects the
1685 // following registers set up:
1686 //
1687 // rax: exception
1688 // rdx: return address/pc that threw exception
1689 // rsp: expression stack of caller
1690 // rbp: ebp of caller
1691 __ push(rax); // save exception
1692 __ push(rdx); // save return address
1693 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1694 SharedRuntime::exception_handler_for_return_address),
1695 thread, rdx);
1696 __ mov(rbx, rax); // save exception handler
1697 __ pop(rdx); // restore return address
1698 __ pop(rax); // restore exception
1699 // Note that an "issuing PC" is actually the next PC after the call
1700 __ jmp(rbx); // jump to exception
1701 // handler of caller
1702 }
1703
1704
1705 //
1706 // JVMTI ForceEarlyReturn support
1707 //
1708 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1709 address entry = __ pc();
1710
1711 __ restore_bcp();
1712 __ restore_locals();
1713 __ empty_expression_stack();
1714 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1715
1716 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1717 NOT_LP64(__ get_thread(thread));
1718 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1719 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1720
1721 // Clear the earlyret state
1722 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1723
1724 __ remove_activation(state, rsi,
1725 false, /* throw_monitor_exception */
1726 false, /* install_monitor_exception */
1727 true); /* notify_jvmdi */
1728 __ jmp(rsi);
1729
1730 return entry;
1731 } // end of ForceEarlyReturn support
1732
1733
1734 //-----------------------------------------------------------------------------
1735 // Helper for vtos entry point generation
1736
1737 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1738 address& bep,
1739 address& cep,
1740 address& sep,
1741 address& aep,
1742 address& iep,
1743 address& lep,
1744 address& fep,
1745 address& dep,
1746 address& vep) {
1747 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1748 Label L;
1749 #ifndef _LP64
1750 fep = __ pc(); // ftos entry point
1751 __ push(ftos);
1752 __ jmpb(L);
1753 dep = __ pc(); // dtos entry point
1754 __ push(dtos);
1755 __ jmpb(L);
1756 #else
1757 fep = __ pc(); // ftos entry point
1758 __ push_f(xmm0);
1759 __ jmpb(L);
1760 dep = __ pc(); // dtos entry point
1761 __ push_d(xmm0);
1762 __ jmpb(L);
1763 #endif // _LP64
1764 lep = __ pc(); // ltos entry point
1765 __ push_l();
1766 __ jmpb(L);
1767 aep = bep = cep = sep = iep = __ pc(); // [abcsi]tos entry point
1768 __ push_i_or_ptr();
1769 vep = __ pc(); // vtos entry point
1770 __ bind(L);
1771 generate_and_dispatch(t);
1772 }
1773
1774 //-----------------------------------------------------------------------------
1775
1776 // Non-product code
1777 #ifndef PRODUCT
1778
1779 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1780 address entry = __ pc();
1781
1782 #ifndef _LP64
1783 // prepare expression stack
1784 __ pop(rcx); // pop return address so expression stack is 'pure'
1785 __ push(state); // save tosca
1786
1787 // pass tosca registers as arguments & call tracer
1788 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1789 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1790 __ pop(state); // restore tosca
1791
1792 // return
1793 __ jmp(rcx);
1794 #else
1795 __ push(state);
1796 __ push(c_rarg0);
1797 __ push(c_rarg1);
1798 __ push(c_rarg2);
1799 __ push(c_rarg3);
1800 __ mov(c_rarg2, rax); // Pass itos
1801 #ifdef _WIN64
1802 __ movflt(xmm3, xmm0); // Pass ftos
1803 #endif
1804 __ call_VM(noreg,
1805 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1806 c_rarg1, c_rarg2, c_rarg3);
1807 __ pop(c_rarg3);
1808 __ pop(c_rarg2);
1809 __ pop(c_rarg1);
1810 __ pop(c_rarg0);
1811 __ pop(state);
1812 __ ret(0); // return from result handler
1813 #endif // _LP64
1814
1815 return entry;
1816 }
1817
1818 void TemplateInterpreterGenerator::count_bytecode() {
1819 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value), rscratch1);
1820 }
1821
1822 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1823 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]), rscratch1);
1824 }
1825
1826 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1827 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1828 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1829 __ orl(rbx,
1830 ((int) t->bytecode()) <<
1831 BytecodePairHistogram::log2_number_of_codes);
1832 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx, rscratch1);
1833 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1834 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1835 }
1836
1837
1838 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1839 // Call a little run-time stub to avoid blow-up for each bytecode.
1840 // The run-time runtime saves the right registers, depending on
1841 // the tosca in-state for the given template.
1842
1843 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1844 "entry must have been generated");
1845 #ifndef _LP64
1846 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1847 #else
1848 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1849 __ andptr(rsp, -16); // align stack as required by ABI
1850 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1851 __ mov(rsp, r12); // restore sp
1852 __ reinit_heapbase();
1853 #endif // _LP64
1854 }
1855
1856
1857 void TemplateInterpreterGenerator::stop_interpreter_at() {
1858 Label L;
1859 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1860 StopInterpreterAt,
1861 rscratch1);
1862 __ jcc(Assembler::notEqual, L);
1863 __ int3();
1864 __ bind(L);
1865 }
1866 #endif // !PRODUCT