1 /*
2 * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2020, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "compiler/compiler_globals.hpp"
30 #include "gc/shared/barrierSetAssembler.hpp"
31 #include "interpreter/bytecodeHistogram.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/interpreterRuntime.hpp"
34 #include "interpreter/interp_masm.hpp"
35 #include "interpreter/templateInterpreterGenerator.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "interpreter/bytecodeTracer.hpp"
38 #include "memory/resourceArea.hpp"
39 #include "oops/arrayOop.hpp"
40 #include "oops/methodData.hpp"
41 #include "oops/method.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/inlineKlass.hpp"
44 #include "prims/jvmtiExport.hpp"
45 #include "prims/jvmtiThreadState.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "runtime/frame.inline.hpp"
49 #include "runtime/jniHandles.hpp"
50 #include "runtime/sharedRuntime.hpp"
51 #include "runtime/stubRoutines.hpp"
52 #include "runtime/synchronizer.hpp"
53 #include "runtime/timer.hpp"
54 #include "runtime/vframeArray.hpp"
55 #include "utilities/debug.hpp"
56 #include "utilities/powerOfTwo.hpp"
57 #include <sys/types.h>
58
59 #ifndef PRODUCT
60 #include "oops/method.hpp"
61 #endif // !PRODUCT
62
63 // Size of interpreter code. Increase if too small. Interpreter will
64 // fail with a guarantee ("not enough space for interpreter generation");
65 // if too small.
66 // Run with +PrintInterpreter to get the VM to print out the size.
67 // Max size with JVMTI
68 int TemplateInterpreter::InterpreterCodeSize = 200 * 1024;
69
70 #define __ _masm->
71
72 //-----------------------------------------------------------------------------
73
74 extern "C" void entry(CodeBuffer*);
75
76 //-----------------------------------------------------------------------------
77
78 address TemplateInterpreterGenerator::generate_slow_signature_handler() {
79 address entry = __ pc();
80
81 __ andr(esp, esp, -16);
82 __ mov(c_rarg3, esp);
83 // rmethod
84 // rlocals
85 // c_rarg3: first stack arg - wordSize
86
87 // adjust sp
88 __ sub(sp, c_rarg3, 18 * wordSize);
89 __ str(lr, Address(__ pre(sp, -2 * wordSize)));
90 __ call_VM(noreg,
91 CAST_FROM_FN_PTR(address,
92 InterpreterRuntime::slow_signature_handler),
93 rmethod, rlocals, c_rarg3);
94
95 // r0: result handler
96
97 // Stack layout:
98 // rsp: return address <- sp
99 // 1 garbage
100 // 8 integer args (if static first is unused)
101 // 1 float/double identifiers
102 // 8 double args
103 // stack args <- esp
104 // garbage
105 // expression stack bottom
106 // bcp (NULL)
107 // ...
108
109 // Restore LR
110 __ ldr(lr, Address(__ post(sp, 2 * wordSize)));
111
112 // Do FP first so we can use c_rarg3 as temp
113 __ ldrw(c_rarg3, Address(sp, 9 * wordSize)); // float/double identifiers
114
115 for (int i = 0; i < Argument::n_float_register_parameters_c; i++) {
116 const FloatRegister r = as_FloatRegister(i);
117
118 Label d, done;
119
120 __ tbnz(c_rarg3, i, d);
121 __ ldrs(r, Address(sp, (10 + i) * wordSize));
122 __ b(done);
123 __ bind(d);
124 __ ldrd(r, Address(sp, (10 + i) * wordSize));
125 __ bind(done);
126 }
127
128 // c_rarg0 contains the result from the call of
129 // InterpreterRuntime::slow_signature_handler so we don't touch it
130 // here. It will be loaded with the JNIEnv* later.
131 __ ldr(c_rarg1, Address(sp, 1 * wordSize));
132 for (int i = c_rarg2->encoding(); i <= c_rarg7->encoding(); i += 2) {
133 Register rm = as_Register(i), rn = as_Register(i+1);
134 __ ldp(rm, rn, Address(sp, i * wordSize));
135 }
136
137 __ add(sp, sp, 18 * wordSize);
138 __ ret(lr);
139
140 return entry;
141 }
142
143
144 //
145 // Various method entries
146 //
147
148 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
149 // rmethod: Method*
150 // r13: sender sp
151 // esp: args
152
153 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
154
155 // These don't need a safepoint check because they aren't virtually
156 // callable. We won't enter these intrinsics from compiled code.
157 // If in the future we added an intrinsic which was virtually callable
158 // we'd have to worry about how to safepoint so that this code is used.
159
160 // mathematical functions inlined by compiler
161 // (interpreter must provide identical implementation
162 // in order to avoid monotonicity bugs when switching
163 // from interpreter to compiler in the middle of some
164 // computation)
165 //
166 // stack:
167 // [ arg ] <-- esp
168 // [ arg ]
169 // retaddr in lr
170
171 address entry_point = NULL;
172 Register continuation = lr;
173 switch (kind) {
174 case Interpreter::java_lang_math_abs:
175 entry_point = __ pc();
176 __ ldrd(v0, Address(esp));
177 __ fabsd(v0, v0);
178 __ mov(sp, r13); // Restore caller's SP
179 break;
180 case Interpreter::java_lang_math_sqrt:
181 entry_point = __ pc();
182 __ ldrd(v0, Address(esp));
183 __ fsqrtd(v0, v0);
184 __ mov(sp, r13);
185 break;
186 case Interpreter::java_lang_math_sin :
187 case Interpreter::java_lang_math_cos :
188 case Interpreter::java_lang_math_tan :
189 case Interpreter::java_lang_math_log :
190 case Interpreter::java_lang_math_log10 :
191 case Interpreter::java_lang_math_exp :
192 entry_point = __ pc();
193 __ ldrd(v0, Address(esp));
194 __ mov(sp, r13);
195 __ mov(r19, lr);
196 continuation = r19; // The first callee-saved register
197 generate_transcendental_entry(kind, 1);
198 break;
199 case Interpreter::java_lang_math_pow :
200 entry_point = __ pc();
201 __ mov(r19, lr);
202 continuation = r19;
203 __ ldrd(v0, Address(esp, 2 * Interpreter::stackElementSize));
204 __ ldrd(v1, Address(esp));
205 __ mov(sp, r13);
206 generate_transcendental_entry(kind, 2);
207 break;
208 case Interpreter::java_lang_math_fmaD :
209 if (UseFMA) {
210 entry_point = __ pc();
211 __ ldrd(v0, Address(esp, 4 * Interpreter::stackElementSize));
212 __ ldrd(v1, Address(esp, 2 * Interpreter::stackElementSize));
213 __ ldrd(v2, Address(esp));
214 __ fmaddd(v0, v0, v1, v2);
215 __ mov(sp, r13); // Restore caller's SP
216 }
217 break;
218 case Interpreter::java_lang_math_fmaF :
219 if (UseFMA) {
220 entry_point = __ pc();
221 __ ldrs(v0, Address(esp, 2 * Interpreter::stackElementSize));
222 __ ldrs(v1, Address(esp, Interpreter::stackElementSize));
223 __ ldrs(v2, Address(esp));
224 __ fmadds(v0, v0, v1, v2);
225 __ mov(sp, r13); // Restore caller's SP
226 }
227 break;
228 default:
229 ;
230 }
231 if (entry_point) {
232 __ br(continuation);
233 }
234
235 return entry_point;
236 }
237
238 // double trigonometrics and transcendentals
239 // static jdouble dsin(jdouble x);
240 // static jdouble dcos(jdouble x);
241 // static jdouble dtan(jdouble x);
242 // static jdouble dlog(jdouble x);
243 // static jdouble dlog10(jdouble x);
244 // static jdouble dexp(jdouble x);
245 // static jdouble dpow(jdouble x, jdouble y);
246
247 void TemplateInterpreterGenerator::generate_transcendental_entry(AbstractInterpreter::MethodKind kind, int fpargs) {
248 address fn;
249 switch (kind) {
250 case Interpreter::java_lang_math_sin :
251 if (StubRoutines::dsin() == NULL) {
252 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
253 } else {
254 fn = CAST_FROM_FN_PTR(address, StubRoutines::dsin());
255 }
256 break;
257 case Interpreter::java_lang_math_cos :
258 if (StubRoutines::dcos() == NULL) {
259 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
260 } else {
261 fn = CAST_FROM_FN_PTR(address, StubRoutines::dcos());
262 }
263 break;
264 case Interpreter::java_lang_math_tan :
265 if (StubRoutines::dtan() == NULL) {
266 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
267 } else {
268 fn = CAST_FROM_FN_PTR(address, StubRoutines::dtan());
269 }
270 break;
271 case Interpreter::java_lang_math_log :
272 if (StubRoutines::dlog() == NULL) {
273 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
274 } else {
275 fn = CAST_FROM_FN_PTR(address, StubRoutines::dlog());
276 }
277 break;
278 case Interpreter::java_lang_math_log10 :
279 if (StubRoutines::dlog10() == NULL) {
280 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
281 } else {
282 fn = CAST_FROM_FN_PTR(address, StubRoutines::dlog10());
283 }
284 break;
285 case Interpreter::java_lang_math_exp :
286 if (StubRoutines::dexp() == NULL) {
287 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dexp);
288 } else {
289 fn = CAST_FROM_FN_PTR(address, StubRoutines::dexp());
290 }
291 break;
292 case Interpreter::java_lang_math_pow :
293 if (StubRoutines::dpow() == NULL) {
294 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dpow);
295 } else {
296 fn = CAST_FROM_FN_PTR(address, StubRoutines::dpow());
297 }
298 break;
299 default:
300 ShouldNotReachHere();
301 fn = NULL; // unreachable
302 }
303 __ mov(rscratch1, fn);
304 __ blr(rscratch1);
305 }
306
307 // Abstract method entry
308 // Attempt to execute abstract method. Throw exception
309 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
310 // rmethod: Method*
311 // r13: sender SP
312
313 address entry_point = __ pc();
314
315 // abstract method entry
316
317 // pop return address, reset last_sp to NULL
318 __ empty_expression_stack();
319 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
320 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
321
322 // throw exception
323 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
324 InterpreterRuntime::throw_AbstractMethodErrorWithMethod),
325 rmethod);
326 // the call_VM checks for exception, so we should never return here.
327 __ should_not_reach_here();
328
329 return entry_point;
330 }
331
332 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
333 address entry = __ pc();
334
335 #ifdef ASSERT
336 {
337 Label L;
338 __ ldr(rscratch1, Address(rfp,
339 frame::interpreter_frame_monitor_block_top_offset *
340 wordSize));
341 __ mov(rscratch2, sp);
342 __ cmp(rscratch1, rscratch2); // maximal rsp for current rfp (stack
343 // grows negative)
344 __ br(Assembler::HS, L); // check if frame is complete
345 __ stop ("interpreter frame not set up");
346 __ bind(L);
347 }
348 #endif // ASSERT
349 // Restore bcp under the assumption that the current frame is still
350 // interpreted
351 __ restore_bcp();
352
353 // expression stack must be empty before entering the VM if an
354 // exception happened
355 __ empty_expression_stack();
356 // throw exception
357 __ call_VM(noreg,
358 CAST_FROM_FN_PTR(address,
359 InterpreterRuntime::throw_StackOverflowError));
360 return entry;
361 }
362
363 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
364 address entry = __ pc();
365 // expression stack must be empty before entering the VM if an
366 // exception happened
367 __ empty_expression_stack();
368 // setup parameters
369
370 // ??? convention: expect aberrant index in register r1
371 __ movw(c_rarg2, r1);
372 // ??? convention: expect array in register r3
373 __ mov(c_rarg1, r3);
374 __ call_VM(noreg,
375 CAST_FROM_FN_PTR(address,
376 InterpreterRuntime::
377 throw_ArrayIndexOutOfBoundsException),
378 c_rarg1, c_rarg2);
379 return entry;
380 }
381
382 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
383 address entry = __ pc();
384
385 // object is at TOS
386 __ pop(c_rarg1);
387
388 // expression stack must be empty before entering the VM if an
389 // exception happened
390 __ empty_expression_stack();
391
392 __ call_VM(noreg,
393 CAST_FROM_FN_PTR(address,
394 InterpreterRuntime::
395 throw_ClassCastException),
396 c_rarg1);
397 return entry;
398 }
399
400 address TemplateInterpreterGenerator::generate_exception_handler_common(
401 const char* name, const char* message, bool pass_oop) {
402 assert(!pass_oop || message == NULL, "either oop or message but not both");
403 address entry = __ pc();
404 if (pass_oop) {
405 // object is at TOS
406 __ pop(c_rarg2);
407 }
408 // expression stack must be empty before entering the VM if an
409 // exception happened
410 __ empty_expression_stack();
411 // setup parameters
412 __ lea(c_rarg1, Address((address)name));
413 if (pass_oop) {
414 __ call_VM(r0, CAST_FROM_FN_PTR(address,
415 InterpreterRuntime::
416 create_klass_exception),
417 c_rarg1, c_rarg2);
418 } else {
419 // kind of lame ExternalAddress can't take NULL because
420 // external_word_Relocation will assert.
421 if (message != NULL) {
422 __ lea(c_rarg2, Address((address)message));
423 } else {
424 __ mov(c_rarg2, NULL_WORD);
425 }
426 __ call_VM(r0,
427 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
428 c_rarg1, c_rarg2);
429 }
430 // throw exception
431 __ b(address(Interpreter::throw_exception_entry()));
432 return entry;
433 }
434
435 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
436 address entry = __ pc();
437
438 // Restore stack bottom in case i2c adjusted stack
439 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
440 // and NULL it as marker that esp is now tos until next java call
441 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
442
443 if (state == atos && InlineTypeReturnedAsFields) {
444 __ store_inline_type_fields_to_buf(NULL, true);
445 }
446
447 __ restore_bcp();
448 __ restore_locals();
449 __ restore_constant_pool_cache();
450 __ get_method(rmethod);
451
452 if (state == atos) {
453 Register obj = r0;
454 Register mdp = r1;
455 Register tmp = r2;
456 __ profile_return_type(mdp, obj, tmp);
457 }
458
459 // Pop N words from the stack
460 __ get_cache_and_index_at_bcp(r1, r2, 1, index_size);
461 __ ldr(r1, Address(r1, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
462 __ andr(r1, r1, ConstantPoolCacheEntry::parameter_size_mask);
463
464 __ add(esp, esp, r1, Assembler::LSL, 3);
465
466 // Restore machine SP
467 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
468 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
469 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
470 __ ldr(rscratch2,
471 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
472 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
473 __ andr(sp, rscratch1, -16);
474
475 __ check_and_handle_popframe(rthread);
476 __ check_and_handle_earlyret(rthread);
477
478 __ get_dispatch();
479 __ dispatch_next(state, step);
480
481 return entry;
482 }
483
484 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
485 int step,
486 address continuation) {
487 address entry = __ pc();
488 __ restore_bcp();
489 __ restore_locals();
490 __ restore_constant_pool_cache();
491 __ get_method(rmethod);
492 __ get_dispatch();
493
494 // Calculate stack limit
495 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
496 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
497 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
498 __ ldr(rscratch2,
499 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
500 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
501 __ andr(sp, rscratch1, -16);
502
503 // Restore expression stack pointer
504 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
505 // NULL last_sp until next java call
506 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
507
508 #if INCLUDE_JVMCI
509 // Check if we need to take lock at entry of synchronized method. This can
510 // only occur on method entry so emit it only for vtos with step 0.
511 if (EnableJVMCI && state == vtos && step == 0) {
512 Label L;
513 __ ldrb(rscratch1, Address(rthread, JavaThread::pending_monitorenter_offset()));
514 __ cbz(rscratch1, L);
515 // Clear flag.
516 __ strb(zr, Address(rthread, JavaThread::pending_monitorenter_offset()));
517 // Take lock.
518 lock_method();
519 __ bind(L);
520 } else {
521 #ifdef ASSERT
522 if (EnableJVMCI) {
523 Label L;
524 __ ldrb(rscratch1, Address(rthread, JavaThread::pending_monitorenter_offset()));
525 __ cbz(rscratch1, L);
526 __ stop("unexpected pending monitor in deopt entry");
527 __ bind(L);
528 }
529 #endif
530 }
531 #endif
532 // handle exceptions
533 {
534 Label L;
535 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
536 __ cbz(rscratch1, L);
537 __ call_VM(noreg,
538 CAST_FROM_FN_PTR(address,
539 InterpreterRuntime::throw_pending_exception));
540 __ should_not_reach_here();
541 __ bind(L);
542 }
543
544 if (continuation == NULL) {
545 __ dispatch_next(state, step);
546 } else {
547 __ jump_to_entry(continuation);
548 }
549 return entry;
550 }
551
552 address TemplateInterpreterGenerator::generate_result_handler_for(
553 BasicType type) {
554 address entry = __ pc();
555 switch (type) {
556 case T_BOOLEAN: __ c2bool(r0); break;
557 case T_CHAR : __ uxth(r0, r0); break;
558 case T_BYTE : __ sxtb(r0, r0); break;
559 case T_SHORT : __ sxth(r0, r0); break;
560 case T_INT : __ uxtw(r0, r0); break; // FIXME: We almost certainly don't need this
561 case T_LONG : /* nothing to do */ break;
562 case T_VOID : /* nothing to do */ break;
563 case T_FLOAT : /* nothing to do */ break;
564 case T_DOUBLE : /* nothing to do */ break;
565 case T_PRIMITIVE_OBJECT: // fall through (value types are handled with oops)
566 case T_OBJECT :
567 // retrieve result from frame
568 __ ldr(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
569 // and verify it
570 __ verify_oop(r0);
571 break;
572 default : ShouldNotReachHere();
573 }
574 __ ret(lr); // return from result handler
575 return entry;
576 }
577
578 address TemplateInterpreterGenerator::generate_safept_entry_for(
579 TosState state,
580 address runtime_entry) {
581 address entry = __ pc();
582 __ push(state);
583 __ call_VM(noreg, runtime_entry);
584 __ membar(Assembler::AnyAny);
585 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
586 return entry;
587 }
588
589 // Helpers for commoning out cases in the various type of method entries.
590 //
591
592
593 // increment invocation count & check for overflow
594 //
595 // Note: checking for negative value instead of overflow
596 // so we have a 'sticky' overflow test
597 //
598 // rmethod: method
599 //
600 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow) {
601 Label done;
602 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
603 int increment = InvocationCounter::count_increment;
604 Label no_mdo;
605 if (ProfileInterpreter) {
606 // Are we profiling?
607 __ ldr(r0, Address(rmethod, Method::method_data_offset()));
608 __ cbz(r0, no_mdo);
609 // Increment counter in the MDO
610 const Address mdo_invocation_counter(r0, in_bytes(MethodData::invocation_counter_offset()) +
611 in_bytes(InvocationCounter::counter_offset()));
612 const Address mask(r0, in_bytes(MethodData::invoke_mask_offset()));
613 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rscratch1, rscratch2, false, Assembler::EQ, overflow);
614 __ b(done);
615 }
616 __ bind(no_mdo);
617 // Increment counter in MethodCounters
618 const Address invocation_counter(rscratch2,
619 MethodCounters::invocation_counter_offset() +
620 InvocationCounter::counter_offset());
621 __ get_method_counters(rmethod, rscratch2, done);
622 const Address mask(rscratch2, in_bytes(MethodCounters::invoke_mask_offset()));
623 __ increment_mask_and_jump(invocation_counter, increment, mask, rscratch1, r1, false, Assembler::EQ, overflow);
624 __ bind(done);
625 }
626
627 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
628
629 // Asm interpreter on entry
630 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
631 // Everything as it was on entry
632
633 // InterpreterRuntime::frequency_counter_overflow takes two
634 // arguments, the first (thread) is passed by call_VM, the second
635 // indicates if the counter overflow occurs at a backwards branch
636 // (NULL bcp). We pass zero for it. The call returns the address
637 // of the verified entry point for the method or NULL if the
638 // compilation did not complete (either went background or bailed
639 // out).
640 __ mov(c_rarg1, 0);
641 __ call_VM(noreg,
642 CAST_FROM_FN_PTR(address,
643 InterpreterRuntime::frequency_counter_overflow),
644 c_rarg1);
645
646 __ b(do_continue);
647 }
648
649 // See if we've got enough room on the stack for locals plus overhead
650 // below JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
651 // without going through the signal handler, i.e., reserved and yellow zones
652 // will not be made usable. The shadow zone must suffice to handle the
653 // overflow.
654 // The expression stack grows down incrementally, so the normal guard
655 // page mechanism will work for that.
656 //
657 // NOTE: Since the additional locals are also always pushed (wasn't
658 // obvious in generate_method_entry) so the guard should work for them
659 // too.
660 //
661 // Args:
662 // r3: number of additional locals this frame needs (what we must check)
663 // rmethod: Method*
664 //
665 // Kills:
666 // r0
667 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
668
669 // monitor entry size: see picture of stack set
670 // (generate_method_entry) and frame_amd64.hpp
671 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
672
673 // total overhead size: entry_size + (saved rbp through expr stack
674 // bottom). be sure to change this if you add/subtract anything
675 // to/from the overhead area
676 const int overhead_size =
677 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
678
679 const int page_size = os::vm_page_size();
680
681 Label after_frame_check;
682
683 // see if the frame is greater than one page in size. If so,
684 // then we need to verify there is enough stack space remaining
685 // for the additional locals.
686 //
687 // Note that we use SUBS rather than CMP here because the immediate
688 // field of this instruction may overflow. SUBS can cope with this
689 // because it is a macro that will expand to some number of MOV
690 // instructions and a register operation.
691 __ subs(rscratch1, r3, (page_size - overhead_size) / Interpreter::stackElementSize);
692 __ br(Assembler::LS, after_frame_check);
693
694 // compute rsp as if this were going to be the last frame on
695 // the stack before the red zone
696
697 // locals + overhead, in bytes
698 __ mov(r0, overhead_size);
699 __ add(r0, r0, r3, Assembler::LSL, Interpreter::logStackElementSize); // 2 slots per parameter.
700
701 const Address stack_limit(rthread, JavaThread::stack_overflow_limit_offset());
702 __ ldr(rscratch1, stack_limit);
703
704 #ifdef ASSERT
705 Label limit_okay;
706 // Verify that thread stack limit is non-zero.
707 __ cbnz(rscratch1, limit_okay);
708 __ stop("stack overflow limit is zero");
709 __ bind(limit_okay);
710 #endif
711
712 // Add stack limit to locals.
713 __ add(r0, r0, rscratch1);
714
715 // Check against the current stack bottom.
716 __ cmp(sp, r0);
717 __ br(Assembler::HI, after_frame_check);
718
719 // Remove the incoming args, peeling the machine SP back to where it
720 // was in the caller. This is not strictly necessary, but unless we
721 // do so the stack frame may have a garbage FP; this ensures a
722 // correct call stack that we can always unwind. The ANDR should be
723 // unnecessary because the sender SP in r13 is always aligned, but
724 // it doesn't hurt.
725 __ andr(sp, r13, -16);
726
727 // Note: the restored frame is not necessarily interpreted.
728 // Use the shared runtime version of the StackOverflowError.
729 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
730 __ far_jump(RuntimeAddress(StubRoutines::throw_StackOverflowError_entry()));
731
732 // all done with frame size check
733 __ bind(after_frame_check);
734 }
735
736 // Allocate monitor and lock method (asm interpreter)
737 //
738 // Args:
739 // rmethod: Method*
740 // rlocals: locals
741 //
742 // Kills:
743 // r0
744 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
745 // rscratch1, rscratch2 (scratch regs)
746 void TemplateInterpreterGenerator::lock_method() {
747 // synchronize method
748 const Address access_flags(rmethod, Method::access_flags_offset());
749 const Address monitor_block_top(
750 rfp,
751 frame::interpreter_frame_monitor_block_top_offset * wordSize);
752 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
753
754 #ifdef ASSERT
755 {
756 Label L;
757 __ ldrw(r0, access_flags);
758 __ tst(r0, JVM_ACC_SYNCHRONIZED);
759 __ br(Assembler::NE, L);
760 __ stop("method doesn't need synchronization");
761 __ bind(L);
762 }
763 #endif // ASSERT
764
765 // get synchronization object
766 {
767 Label done;
768 __ ldrw(r0, access_flags);
769 __ tst(r0, JVM_ACC_STATIC);
770 // get receiver (assume this is frequent case)
771 __ ldr(r0, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
772 __ br(Assembler::EQ, done);
773 __ load_mirror(r0, rmethod);
774
775 #ifdef ASSERT
776 {
777 Label L;
778 __ cbnz(r0, L);
779 __ stop("synchronization object is NULL");
780 __ bind(L);
781 }
782 #endif // ASSERT
783
784 __ bind(done);
785 }
786
787 // add space for monitor & lock
788 __ sub(sp, sp, entry_size); // add space for a monitor entry
789 __ sub(esp, esp, entry_size);
790 __ mov(rscratch1, esp);
791 __ str(rscratch1, monitor_block_top); // set new monitor block top
792 // store object
793 __ str(r0, Address(esp, BasicObjectLock::obj_offset_in_bytes()));
794 __ mov(c_rarg1, esp); // object address
795 __ lock_object(c_rarg1);
796 }
797
798 // Generate a fixed interpreter frame. This is identical setup for
799 // interpreted methods and for native methods hence the shared code.
800 //
801 // Args:
802 // lr: return address
803 // rmethod: Method*
804 // rlocals: pointer to locals
805 // rcpool: cp cache
806 // stack_pointer: previous sp
807 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
808 // initialize fixed part of activation frame
809 if (native_call) {
810 __ sub(esp, sp, 14 * wordSize);
811 __ mov(rbcp, zr);
812 __ stp(esp, zr, Address(__ pre(sp, -14 * wordSize)));
813 // add 2 zero-initialized slots for native calls
814 __ stp(zr, zr, Address(sp, 12 * wordSize));
815 } else {
816 __ sub(esp, sp, 12 * wordSize);
817 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); // get ConstMethod
818 __ add(rbcp, rscratch1, in_bytes(ConstMethod::codes_offset())); // get codebase
819 __ stp(esp, rbcp, Address(__ pre(sp, -12 * wordSize)));
820 }
821
822 if (ProfileInterpreter) {
823 Label method_data_continue;
824 __ ldr(rscratch1, Address(rmethod, Method::method_data_offset()));
825 __ cbz(rscratch1, method_data_continue);
826 __ lea(rscratch1, Address(rscratch1, in_bytes(MethodData::data_offset())));
827 __ bind(method_data_continue);
828 __ stp(rscratch1, rmethod, Address(sp, 6 * wordSize)); // save Method* and mdp (method data pointer)
829 } else {
830 __ stp(zr, rmethod, Address(sp, 6 * wordSize)); // save Method* (no mdp)
831 }
832
833 // Get mirror and store it in the frame as GC root for this Method*
834 __ load_mirror(r10, rmethod);
835 __ stp(r10, zr, Address(sp, 4 * wordSize));
836
837 __ ldr(rcpool, Address(rmethod, Method::const_offset()));
838 __ ldr(rcpool, Address(rcpool, ConstMethod::constants_offset()));
839 __ ldr(rcpool, Address(rcpool, ConstantPool::cache_offset_in_bytes()));
840 __ stp(rlocals, rcpool, Address(sp, 2 * wordSize));
841
842 __ protect_return_address();
843 __ stp(rfp, lr, Address(sp, 10 * wordSize));
844 __ lea(rfp, Address(sp, 10 * wordSize));
845
846 // set sender sp
847 // leave last_sp as null
848 __ stp(zr, r13, Address(sp, 8 * wordSize));
849
850 // Move SP out of the way
851 if (! native_call) {
852 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
853 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
854 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
855 __ sub(rscratch1, sp, rscratch1, ext::uxtw, 3);
856 __ andr(sp, rscratch1, -16);
857 }
858 }
859
860 // End of helpers
861
862 // Various method entries
863 //------------------------------------------------------------------------------------------------------------------------
864 //
865 //
866
867 // Method entry for java.lang.ref.Reference.get.
868 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
869 // Code: _aload_0, _getfield, _areturn
870 // parameter size = 1
871 //
872 // The code that gets generated by this routine is split into 2 parts:
873 // 1. The "intrinsified" code for G1 (or any SATB based GC),
874 // 2. The slow path - which is an expansion of the regular method entry.
875 //
876 // Notes:-
877 // * In the G1 code we do not check whether we need to block for
878 // a safepoint. If G1 is enabled then we must execute the specialized
879 // code for Reference.get (except when the Reference object is null)
880 // so that we can log the value in the referent field with an SATB
881 // update buffer.
882 // If the code for the getfield template is modified so that the
883 // G1 pre-barrier code is executed when the current method is
884 // Reference.get() then going through the normal method entry
885 // will be fine.
886 // * The G1 code can, however, check the receiver object (the instance
887 // of java.lang.Reference) and jump to the slow path if null. If the
888 // Reference object is null then we obviously cannot fetch the referent
889 // and so we don't need to call the G1 pre-barrier. Thus we can use the
890 // regular method entry code to generate the NPE.
891 //
892 // This code is based on generate_accessor_entry.
893 //
894 // rmethod: Method*
895 // r13: senderSP must preserve for slow path, set SP to it on fast path
896
897 // LR is live. It must be saved around calls.
898
899 address entry = __ pc();
900
901 const int referent_offset = java_lang_ref_Reference::referent_offset();
902
903 Label slow_path;
904 const Register local_0 = c_rarg0;
905 // Check if local 0 != NULL
906 // If the receiver is null then it is OK to jump to the slow path.
907 __ ldr(local_0, Address(esp, 0));
908 __ cbz(local_0, slow_path);
909
910 __ mov(r19, r13); // Move senderSP to a callee-saved register
911
912 // Load the value of the referent field.
913 const Address field_address(local_0, referent_offset);
914 BarrierSetAssembler *bs = BarrierSet::barrier_set()->barrier_set_assembler();
915 bs->load_at(_masm, IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT, local_0, field_address, /*tmp1*/ rscratch2, /*tmp2*/ rscratch1);
916
917 // areturn
918 __ andr(sp, r19, -16); // done with stack
919 __ ret(lr);
920
921 // generate a vanilla interpreter entry as the slow path
922 __ bind(slow_path);
923 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
924 return entry;
925
926 }
927
928 /**
929 * Method entry for static native methods:
930 * int java.util.zip.CRC32.update(int crc, int b)
931 */
932 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
933 if (UseCRC32Intrinsics) {
934 address entry = __ pc();
935
936 // rmethod: Method*
937 // r13: senderSP must preserved for slow path
938 // esp: args
939
940 Label slow_path;
941 // If we need a safepoint check, generate full interpreter entry.
942 __ safepoint_poll(slow_path, false /* at_return */, false /* acquire */, false /* in_nmethod */);
943
944 // We don't generate local frame and don't align stack because
945 // we call stub code and there is no safepoint on this path.
946
947 // Load parameters
948 const Register crc = c_rarg0; // crc
949 const Register val = c_rarg1; // source java byte value
950 const Register tbl = c_rarg2; // scratch
951
952 // Arguments are reversed on java expression stack
953 __ ldrw(val, Address(esp, 0)); // byte value
954 __ ldrw(crc, Address(esp, wordSize)); // Initial CRC
955
956 uint64_t offset;
957 __ adrp(tbl, ExternalAddress(StubRoutines::crc_table_addr()), offset);
958 __ add(tbl, tbl, offset);
959
960 __ mvnw(crc, crc); // ~crc
961 __ update_byte_crc32(crc, val, tbl);
962 __ mvnw(crc, crc); // ~crc
963
964 // result in c_rarg0
965
966 __ andr(sp, r13, -16);
967 __ ret(lr);
968
969 // generate a vanilla native entry as the slow path
970 __ bind(slow_path);
971 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
972 return entry;
973 }
974 return NULL;
975 }
976
977 /**
978 * Method entry for static native methods:
979 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
980 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
981 */
982 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
983 if (UseCRC32Intrinsics) {
984 address entry = __ pc();
985
986 // rmethod,: Method*
987 // r13: senderSP must preserved for slow path
988
989 Label slow_path;
990 // If we need a safepoint check, generate full interpreter entry.
991 __ safepoint_poll(slow_path, false /* at_return */, false /* acquire */, false /* in_nmethod */);
992
993 // We don't generate local frame and don't align stack because
994 // we call stub code and there is no safepoint on this path.
995
996 // Load parameters
997 const Register crc = c_rarg0; // crc
998 const Register buf = c_rarg1; // source java byte array address
999 const Register len = c_rarg2; // length
1000 const Register off = len; // offset (never overlaps with 'len')
1001
1002 // Arguments are reversed on java expression stack
1003 // Calculate address of start element
1004 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
1005 __ ldr(buf, Address(esp, 2*wordSize)); // long buf
1006 __ ldrw(off, Address(esp, wordSize)); // offset
1007 __ add(buf, buf, off); // + offset
1008 __ ldrw(crc, Address(esp, 4*wordSize)); // Initial CRC
1009 } else {
1010 __ ldr(buf, Address(esp, 2*wordSize)); // byte[] array
1011 __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
1012 __ ldrw(off, Address(esp, wordSize)); // offset
1013 __ add(buf, buf, off); // + offset
1014 __ ldrw(crc, Address(esp, 3*wordSize)); // Initial CRC
1015 }
1016 // Can now load 'len' since we're finished with 'off'
1017 __ ldrw(len, Address(esp, 0x0)); // Length
1018
1019 __ andr(sp, r13, -16); // Restore the caller's SP
1020
1021 // We are frameless so we can just jump to the stub.
1022 __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()));
1023
1024 // generate a vanilla native entry as the slow path
1025 __ bind(slow_path);
1026 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
1027 return entry;
1028 }
1029 return NULL;
1030 }
1031
1032 /**
1033 * Method entry for intrinsic-candidate (non-native) methods:
1034 * int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end)
1035 * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long buf, int off, int end)
1036 * Unlike CRC32, CRC32C does not have any methods marked as native
1037 * CRC32C also uses an "end" variable instead of the length variable CRC32 uses
1038 */
1039 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
1040 if (UseCRC32CIntrinsics) {
1041 address entry = __ pc();
1042
1043 // Prepare jump to stub using parameters from the stack
1044 const Register crc = c_rarg0; // initial crc
1045 const Register buf = c_rarg1; // source java byte array address
1046 const Register len = c_rarg2; // len argument to the kernel
1047
1048 const Register end = len; // index of last element to process
1049 const Register off = crc; // offset
1050
1051 __ ldrw(end, Address(esp)); // int end
1052 __ ldrw(off, Address(esp, wordSize)); // int offset
1053 __ sub(len, end, off);
1054 __ ldr(buf, Address(esp, 2*wordSize)); // byte[] buf | long buf
1055 __ add(buf, buf, off); // + offset
1056 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) {
1057 __ ldrw(crc, Address(esp, 4*wordSize)); // long crc
1058 } else {
1059 __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
1060 __ ldrw(crc, Address(esp, 3*wordSize)); // long crc
1061 }
1062
1063 __ andr(sp, r13, -16); // Restore the caller's SP
1064
1065 // Jump to the stub.
1066 __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32C()));
1067
1068 return entry;
1069 }
1070 return NULL;
1071 }
1072
1073 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
1074 // Bang each page in the shadow zone. We can't assume it's been done for
1075 // an interpreter frame with greater than a page of locals, so each page
1076 // needs to be checked. Only true for non-native.
1077 const int n_shadow_pages = (int)(StackOverflow::stack_shadow_zone_size() / os::vm_page_size());
1078 const int start_page = native_call ? n_shadow_pages : 1;
1079 const int page_size = os::vm_page_size();
1080 for (int pages = start_page; pages <= n_shadow_pages ; pages++) {
1081 __ sub(rscratch2, sp, pages*page_size);
1082 __ str(zr, Address(rscratch2));
1083 }
1084 }
1085
1086
1087 // Interpreter stub for calling a native method. (asm interpreter)
1088 // This sets up a somewhat different looking stack for calling the
1089 // native method than the typical interpreter frame setup.
1090 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
1091 // determine code generation flags
1092 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1093
1094 // r1: Method*
1095 // rscratch1: sender sp
1096
1097 address entry_point = __ pc();
1098
1099 const Address constMethod (rmethod, Method::const_offset());
1100 const Address access_flags (rmethod, Method::access_flags_offset());
1101 const Address size_of_parameters(r2, ConstMethod::
1102 size_of_parameters_offset());
1103
1104 // get parameter size (always needed)
1105 __ ldr(r2, constMethod);
1106 __ load_unsigned_short(r2, size_of_parameters);
1107
1108 // Native calls don't need the stack size check since they have no
1109 // expression stack and the arguments are already on the stack and
1110 // we only add a handful of words to the stack.
1111
1112 // rmethod: Method*
1113 // r2: size of parameters
1114 // rscratch1: sender sp
1115
1116 // for natives the size of locals is zero
1117
1118 // compute beginning of parameters (rlocals)
1119 __ add(rlocals, esp, r2, ext::uxtx, 3);
1120 __ add(rlocals, rlocals, -wordSize);
1121
1122 // Pull SP back to minimum size: this avoids holes in the stack
1123 __ andr(sp, esp, -16);
1124
1125 // initialize fixed part of activation frame
1126 generate_fixed_frame(true);
1127
1128 // make sure method is native & not abstract
1129 #ifdef ASSERT
1130 __ ldrw(r0, access_flags);
1131 {
1132 Label L;
1133 __ tst(r0, JVM_ACC_NATIVE);
1134 __ br(Assembler::NE, L);
1135 __ stop("tried to execute non-native method as native");
1136 __ bind(L);
1137 }
1138 {
1139 Label L;
1140 __ tst(r0, JVM_ACC_ABSTRACT);
1141 __ br(Assembler::EQ, L);
1142 __ stop("tried to execute abstract method in interpreter");
1143 __ bind(L);
1144 }
1145 #endif
1146
1147 // Since at this point in the method invocation the exception
1148 // handler would try to exit the monitor of synchronized methods
1149 // which hasn't been entered yet, we set the thread local variable
1150 // _do_not_unlock_if_synchronized to true. The remove_activation
1151 // will check this flag.
1152
1153 const Address do_not_unlock_if_synchronized(rthread,
1154 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1155 __ mov(rscratch2, true);
1156 __ strb(rscratch2, do_not_unlock_if_synchronized);
1157
1158 // increment invocation count & check for overflow
1159 Label invocation_counter_overflow;
1160 if (inc_counter) {
1161 generate_counter_incr(&invocation_counter_overflow);
1162 }
1163
1164 Label continue_after_compile;
1165 __ bind(continue_after_compile);
1166
1167 bang_stack_shadow_pages(true);
1168
1169 // reset the _do_not_unlock_if_synchronized flag
1170 __ strb(zr, do_not_unlock_if_synchronized);
1171
1172 // check for synchronized methods
1173 // Must happen AFTER invocation_counter check and stack overflow check,
1174 // so method is not locked if overflows.
1175 if (synchronized) {
1176 lock_method();
1177 } else {
1178 // no synchronization necessary
1179 #ifdef ASSERT
1180 {
1181 Label L;
1182 __ ldrw(r0, access_flags);
1183 __ tst(r0, JVM_ACC_SYNCHRONIZED);
1184 __ br(Assembler::EQ, L);
1185 __ stop("method needs synchronization");
1186 __ bind(L);
1187 }
1188 #endif
1189 }
1190
1191 // start execution
1192 #ifdef ASSERT
1193 {
1194 Label L;
1195 const Address monitor_block_top(rfp,
1196 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1197 __ ldr(rscratch1, monitor_block_top);
1198 __ cmp(esp, rscratch1);
1199 __ br(Assembler::EQ, L);
1200 __ stop("broken stack frame setup in interpreter");
1201 __ bind(L);
1202 }
1203 #endif
1204
1205 // jvmti support
1206 __ notify_method_entry();
1207
1208 // work registers
1209 const Register t = r17;
1210 const Register result_handler = r19;
1211
1212 // allocate space for parameters
1213 __ ldr(t, Address(rmethod, Method::const_offset()));
1214 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1215
1216 __ sub(rscratch1, esp, t, ext::uxtx, Interpreter::logStackElementSize);
1217 __ andr(sp, rscratch1, -16);
1218 __ mov(esp, rscratch1);
1219
1220 // get signature handler
1221 {
1222 Label L;
1223 __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
1224 __ cbnz(t, L);
1225 __ call_VM(noreg,
1226 CAST_FROM_FN_PTR(address,
1227 InterpreterRuntime::prepare_native_call),
1228 rmethod);
1229 __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
1230 __ bind(L);
1231 }
1232
1233 // call signature handler
1234 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
1235 "adjust this code");
1236 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == sp,
1237 "adjust this code");
1238 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
1239 "adjust this code");
1240
1241 // The generated handlers do not touch rmethod (the method).
1242 // However, large signatures cannot be cached and are generated
1243 // each time here. The slow-path generator can do a GC on return,
1244 // so we must reload it after the call.
1245 __ blr(t);
1246 __ get_method(rmethod); // slow path can do a GC, reload rmethod
1247
1248
1249 // result handler is in r0
1250 // set result handler
1251 __ mov(result_handler, r0);
1252 // pass mirror handle if static call
1253 {
1254 Label L;
1255 __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
1256 __ tbz(t, exact_log2(JVM_ACC_STATIC), L);
1257 // get mirror
1258 __ load_mirror(t, rmethod);
1259 // copy mirror into activation frame
1260 __ str(t, Address(rfp, frame::interpreter_frame_oop_temp_offset * wordSize));
1261 // pass handle to mirror
1262 __ add(c_rarg1, rfp, frame::interpreter_frame_oop_temp_offset * wordSize);
1263 __ bind(L);
1264 }
1265
1266 // get native function entry point in r10
1267 {
1268 Label L;
1269 __ ldr(r10, Address(rmethod, Method::native_function_offset()));
1270 address unsatisfied = (SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1271 __ mov(rscratch2, unsatisfied);
1272 __ ldr(rscratch2, rscratch2);
1273 __ cmp(r10, rscratch2);
1274 __ br(Assembler::NE, L);
1275 __ call_VM(noreg,
1276 CAST_FROM_FN_PTR(address,
1277 InterpreterRuntime::prepare_native_call),
1278 rmethod);
1279 __ get_method(rmethod);
1280 __ ldr(r10, Address(rmethod, Method::native_function_offset()));
1281 __ bind(L);
1282 }
1283
1284 // pass JNIEnv
1285 __ add(c_rarg0, rthread, in_bytes(JavaThread::jni_environment_offset()));
1286
1287 // Set the last Java PC in the frame anchor to be the return address from
1288 // the call to the native method: this will allow the debugger to
1289 // generate an accurate stack trace.
1290 Label native_return;
1291 __ set_last_Java_frame(esp, rfp, native_return, rscratch1);
1292
1293 // change thread state
1294 #ifdef ASSERT
1295 {
1296 Label L;
1297 __ ldrw(t, Address(rthread, JavaThread::thread_state_offset()));
1298 __ cmp(t, (u1)_thread_in_Java);
1299 __ br(Assembler::EQ, L);
1300 __ stop("Wrong thread state in native stub");
1301 __ bind(L);
1302 }
1303 #endif
1304
1305 // Change state to native
1306 __ mov(rscratch1, _thread_in_native);
1307 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1308 __ stlrw(rscratch1, rscratch2);
1309
1310 // Call the native method.
1311 __ blr(r10);
1312 __ bind(native_return);
1313 __ get_method(rmethod);
1314 // result potentially in r0 or v0
1315
1316 // make room for the pushes we're about to do
1317 __ sub(rscratch1, esp, 4 * wordSize);
1318 __ andr(sp, rscratch1, -16);
1319
1320 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1321 // in order to extract the result of a method call. If the order of these
1322 // pushes change or anything else is added to the stack then the code in
1323 // interpreter_frame_result must also change.
1324 __ push(dtos);
1325 __ push(ltos);
1326
1327 __ verify_sve_vector_length();
1328
1329 // change thread state
1330 __ mov(rscratch1, _thread_in_native_trans);
1331 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1332 __ stlrw(rscratch1, rscratch2);
1333
1334 // Force this write out before the read below
1335 __ dmb(Assembler::ISH);
1336
1337 // check for safepoint operation in progress and/or pending suspend requests
1338 {
1339 Label L, Continue;
1340
1341 // We need an acquire here to ensure that any subsequent load of the
1342 // global SafepointSynchronize::_state flag is ordered after this load
1343 // of the thread-local polling word. We don't want this poll to
1344 // return false (i.e. not safepointing) and a later poll of the global
1345 // SafepointSynchronize::_state spuriously to return true.
1346 //
1347 // This is to avoid a race when we're in a native->Java transition
1348 // racing the code which wakes up from a safepoint.
1349 __ safepoint_poll(L, true /* at_return */, true /* acquire */, false /* in_nmethod */);
1350 __ ldrw(rscratch2, Address(rthread, JavaThread::suspend_flags_offset()));
1351 __ cbz(rscratch2, Continue);
1352 __ bind(L);
1353
1354 // Don't use call_VM as it will see a possible pending exception
1355 // and forward it and never return here preventing us from
1356 // clearing _last_native_pc down below. So we do a runtime call by
1357 // hand.
1358 //
1359 __ mov(c_rarg0, rthread);
1360 __ mov(rscratch2, CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
1361 __ blr(rscratch2);
1362 __ get_method(rmethod);
1363 __ reinit_heapbase();
1364 __ bind(Continue);
1365 }
1366
1367 // change thread state
1368 __ mov(rscratch1, _thread_in_Java);
1369 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1370 __ stlrw(rscratch1, rscratch2);
1371
1372 // reset_last_Java_frame
1373 __ reset_last_Java_frame(true);
1374
1375 if (CheckJNICalls) {
1376 // clear_pending_jni_exception_check
1377 __ str(zr, Address(rthread, JavaThread::pending_jni_exception_check_fn_offset()));
1378 }
1379
1380 // reset handle block
1381 __ ldr(t, Address(rthread, JavaThread::active_handles_offset()));
1382 __ str(zr, Address(t, JNIHandleBlock::top_offset_in_bytes()));
1383
1384 // If result is an oop unbox and store it in frame where gc will see it
1385 // and result handler will pick it up
1386
1387 {
1388 Label no_oop;
1389 __ adr(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1390 __ cmp(t, result_handler);
1391 __ br(Assembler::NE, no_oop);
1392 // Unbox oop result, e.g. JNIHandles::resolve result.
1393 __ pop(ltos);
1394 __ resolve_jobject(r0, rthread, t);
1395 __ str(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
1396 // keep stack depth as expected by pushing oop which will eventually be discarded
1397 __ push(ltos);
1398 __ bind(no_oop);
1399 }
1400
1401 {
1402 Label no_reguard;
1403 __ lea(rscratch1, Address(rthread, in_bytes(JavaThread::stack_guard_state_offset())));
1404 __ ldrw(rscratch1, Address(rscratch1));
1405 __ cmp(rscratch1, (u1)StackOverflow::stack_guard_yellow_reserved_disabled);
1406 __ br(Assembler::NE, no_reguard);
1407
1408 __ push_call_clobbered_registers();
1409 __ mov(c_rarg0, rthread);
1410 __ mov(rscratch2, CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages));
1411 __ blr(rscratch2);
1412 __ pop_call_clobbered_registers();
1413
1414 __ bind(no_reguard);
1415 }
1416
1417 // The method register is junk from after the thread_in_native transition
1418 // until here. Also can't call_VM until the bcp has been
1419 // restored. Need bcp for throwing exception below so get it now.
1420 __ get_method(rmethod);
1421
1422 // restore bcp to have legal interpreter frame, i.e., bci == 0 <=>
1423 // rbcp == code_base()
1424 __ ldr(rbcp, Address(rmethod, Method::const_offset())); // get ConstMethod*
1425 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); // get codebase
1426 // handle exceptions (exception handling will handle unlocking!)
1427 {
1428 Label L;
1429 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
1430 __ cbz(rscratch1, L);
1431 // Note: At some point we may want to unify this with the code
1432 // used in call_VM_base(); i.e., we should use the
1433 // StubRoutines::forward_exception code. For now this doesn't work
1434 // here because the rsp is not correctly set at this point.
1435 __ MacroAssembler::call_VM(noreg,
1436 CAST_FROM_FN_PTR(address,
1437 InterpreterRuntime::throw_pending_exception));
1438 __ should_not_reach_here();
1439 __ bind(L);
1440 }
1441
1442 // do unlocking if necessary
1443 {
1444 Label L;
1445 __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
1446 __ tbz(t, exact_log2(JVM_ACC_SYNCHRONIZED), L);
1447 // the code below should be shared with interpreter macro
1448 // assembler implementation
1449 {
1450 Label unlock;
1451 // BasicObjectLock will be first in list, since this is a
1452 // synchronized method. However, need to check that the object
1453 // has not been unlocked by an explicit monitorexit bytecode.
1454
1455 // monitor expect in c_rarg1 for slow unlock path
1456 __ lea (c_rarg1, Address(rfp, // address of first monitor
1457 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1458 wordSize - sizeof(BasicObjectLock))));
1459
1460 __ ldr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
1461 __ cbnz(t, unlock);
1462
1463 // Entry already unlocked, need to throw exception
1464 __ MacroAssembler::call_VM(noreg,
1465 CAST_FROM_FN_PTR(address,
1466 InterpreterRuntime::throw_illegal_monitor_state_exception));
1467 __ should_not_reach_here();
1468
1469 __ bind(unlock);
1470 __ unlock_object(c_rarg1);
1471 }
1472 __ bind(L);
1473 }
1474
1475 // jvmti support
1476 // Note: This must happen _after_ handling/throwing any exceptions since
1477 // the exception handler code notifies the runtime of method exits
1478 // too. If this happens before, method entry/exit notifications are
1479 // not properly paired (was bug - gri 11/22/99).
1480 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1481
1482 // restore potential result in r0:d0, call result handler to
1483 // restore potential result in ST0 & handle result
1484
1485 __ pop(ltos);
1486 __ pop(dtos);
1487
1488 __ blr(result_handler);
1489
1490 // remove activation
1491 __ ldr(esp, Address(rfp,
1492 frame::interpreter_frame_sender_sp_offset *
1493 wordSize)); // get sender sp
1494 // remove frame anchor
1495 __ leave();
1496
1497 // resture sender sp
1498 __ mov(sp, esp);
1499
1500 __ ret(lr);
1501
1502 if (inc_counter) {
1503 // Handle overflow of counter and compile method
1504 __ bind(invocation_counter_overflow);
1505 generate_counter_overflow(continue_after_compile);
1506 }
1507
1508 return entry_point;
1509 }
1510
1511 //
1512 // Generic interpreted method entry to (asm) interpreter
1513 //
1514 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1515 // determine code generation flags
1516 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1517
1518 // rscratch1: sender sp
1519 address entry_point = __ pc();
1520
1521 const Address constMethod(rmethod, Method::const_offset());
1522 const Address access_flags(rmethod, Method::access_flags_offset());
1523 const Address size_of_parameters(r3,
1524 ConstMethod::size_of_parameters_offset());
1525 const Address size_of_locals(r3, ConstMethod::size_of_locals_offset());
1526
1527 // get parameter size (always needed)
1528 // need to load the const method first
1529 __ ldr(r3, constMethod);
1530 __ load_unsigned_short(r2, size_of_parameters);
1531
1532 // r2: size of parameters
1533
1534 __ load_unsigned_short(r3, size_of_locals); // get size of locals in words
1535 __ sub(r3, r3, r2); // r3 = no. of additional locals
1536
1537 // see if we've got enough room on the stack for locals plus overhead.
1538 generate_stack_overflow_check();
1539
1540 // compute beginning of parameters (rlocals)
1541 __ add(rlocals, esp, r2, ext::uxtx, 3);
1542 __ sub(rlocals, rlocals, wordSize);
1543
1544 __ mov(rscratch1, esp);
1545
1546 // r3 - # of additional locals
1547 // allocate space for locals
1548 // explicitly initialize locals
1549 // Initializing memory allocated for locals in the same direction as
1550 // the stack grows to ensure page initialization order according
1551 // to windows-aarch64 stack page growth requirement (see
1552 // https://docs.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-160#stack)
1553 {
1554 Label exit, loop;
1555 __ ands(zr, r3, r3);
1556 __ br(Assembler::LE, exit); // do nothing if r3 <= 0
1557 __ bind(loop);
1558 __ str(zr, Address(__ pre(rscratch1, -wordSize)));
1559 __ sub(r3, r3, 1); // until everything initialized
1560 __ cbnz(r3, loop);
1561 __ bind(exit);
1562 }
1563
1564 // Padding between locals and fixed part of activation frame to ensure
1565 // SP is always 16-byte aligned.
1566 __ andr(sp, rscratch1, -16);
1567
1568 // And the base dispatch table
1569 __ get_dispatch();
1570
1571 // initialize fixed part of activation frame
1572 generate_fixed_frame(false);
1573
1574 // make sure method is not native & not abstract
1575 #ifdef ASSERT
1576 __ ldrw(r0, access_flags);
1577 {
1578 Label L;
1579 __ tst(r0, JVM_ACC_NATIVE);
1580 __ br(Assembler::EQ, L);
1581 __ stop("tried to execute native method as non-native");
1582 __ bind(L);
1583 }
1584 {
1585 Label L;
1586 __ tst(r0, JVM_ACC_ABSTRACT);
1587 __ br(Assembler::EQ, L);
1588 __ stop("tried to execute abstract method in interpreter");
1589 __ bind(L);
1590 }
1591 #endif
1592
1593 // Since at this point in the method invocation the exception
1594 // handler would try to exit the monitor of synchronized methods
1595 // which hasn't been entered yet, we set the thread local variable
1596 // _do_not_unlock_if_synchronized to true. The remove_activation
1597 // will check this flag.
1598
1599 const Address do_not_unlock_if_synchronized(rthread,
1600 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1601 __ mov(rscratch2, true);
1602 __ strb(rscratch2, do_not_unlock_if_synchronized);
1603
1604 Register mdp = r3;
1605 __ profile_parameters_type(mdp, r1, r2);
1606
1607 // increment invocation count & check for overflow
1608 Label invocation_counter_overflow;
1609 if (inc_counter) {
1610 generate_counter_incr(&invocation_counter_overflow);
1611 }
1612
1613 Label continue_after_compile;
1614 __ bind(continue_after_compile);
1615
1616 bang_stack_shadow_pages(false);
1617
1618 // reset the _do_not_unlock_if_synchronized flag
1619 __ strb(zr, do_not_unlock_if_synchronized);
1620
1621 // check for synchronized methods
1622 // Must happen AFTER invocation_counter check and stack overflow check,
1623 // so method is not locked if overflows.
1624 if (synchronized) {
1625 // Allocate monitor and lock method
1626 lock_method();
1627 } else {
1628 // no synchronization necessary
1629 #ifdef ASSERT
1630 {
1631 Label L;
1632 __ ldrw(r0, access_flags);
1633 __ tst(r0, JVM_ACC_SYNCHRONIZED);
1634 __ br(Assembler::EQ, L);
1635 __ stop("method needs synchronization");
1636 __ bind(L);
1637 }
1638 #endif
1639 }
1640
1641 // start execution
1642 #ifdef ASSERT
1643 {
1644 Label L;
1645 const Address monitor_block_top (rfp,
1646 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1647 __ ldr(rscratch1, monitor_block_top);
1648 __ cmp(esp, rscratch1);
1649 __ br(Assembler::EQ, L);
1650 __ stop("broken stack frame setup in interpreter");
1651 __ bind(L);
1652 }
1653 #endif
1654
1655 // jvmti support
1656 __ notify_method_entry();
1657
1658 __ dispatch_next(vtos);
1659
1660 // invocation counter overflow
1661 if (inc_counter) {
1662 // Handle overflow of counter and compile method
1663 __ bind(invocation_counter_overflow);
1664 generate_counter_overflow(continue_after_compile);
1665 }
1666
1667 return entry_point;
1668 }
1669
1670 //-----------------------------------------------------------------------------
1671 // Exceptions
1672
1673 void TemplateInterpreterGenerator::generate_throw_exception() {
1674 // Entry point in previous activation (i.e., if the caller was
1675 // interpreted)
1676 Interpreter::_rethrow_exception_entry = __ pc();
1677 // Restore sp to interpreter_frame_last_sp even though we are going
1678 // to empty the expression stack for the exception processing.
1679 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1680 // r0: exception
1681 // r3: return address/pc that threw exception
1682 __ restore_bcp(); // rbcp points to call/send
1683 __ restore_locals();
1684 __ restore_constant_pool_cache();
1685 __ reinit_heapbase(); // restore rheapbase as heapbase.
1686 __ get_dispatch();
1687
1688 // Entry point for exceptions thrown within interpreter code
1689 Interpreter::_throw_exception_entry = __ pc();
1690 // If we came here via a NullPointerException on the receiver of a
1691 // method, rmethod may be corrupt.
1692 __ get_method(rmethod);
1693 // expression stack is undefined here
1694 // r0: exception
1695 // rbcp: exception bcp
1696 __ verify_oop(r0);
1697 __ mov(c_rarg1, r0);
1698
1699 // expression stack must be empty before entering the VM in case of
1700 // an exception
1701 __ empty_expression_stack();
1702 // find exception handler address and preserve exception oop
1703 __ call_VM(r3,
1704 CAST_FROM_FN_PTR(address,
1705 InterpreterRuntime::exception_handler_for_exception),
1706 c_rarg1);
1707
1708 // Calculate stack limit
1709 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
1710 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
1711 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
1712 __ ldr(rscratch2,
1713 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
1714 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
1715 __ andr(sp, rscratch1, -16);
1716
1717 // r0: exception handler entry point
1718 // r3: preserved exception oop
1719 // rbcp: bcp for exception handler
1720 __ push_ptr(r3); // push exception which is now the only value on the stack
1721 __ br(r0); // jump to exception handler (may be _remove_activation_entry!)
1722
1723 // If the exception is not handled in the current frame the frame is
1724 // removed and the exception is rethrown (i.e. exception
1725 // continuation is _rethrow_exception).
1726 //
1727 // Note: At this point the bci is still the bxi for the instruction
1728 // which caused the exception and the expression stack is
1729 // empty. Thus, for any VM calls at this point, GC will find a legal
1730 // oop map (with empty expression stack).
1731
1732 //
1733 // JVMTI PopFrame support
1734 //
1735
1736 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1737 __ empty_expression_stack();
1738 // Set the popframe_processing bit in pending_popframe_condition
1739 // indicating that we are currently handling popframe, so that
1740 // call_VMs that may happen later do not trigger new popframe
1741 // handling cycles.
1742 __ ldrw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
1743 __ orr(r3, r3, JavaThread::popframe_processing_bit);
1744 __ strw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
1745
1746 {
1747 // Check to see whether we are returning to a deoptimized frame.
1748 // (The PopFrame call ensures that the caller of the popped frame is
1749 // either interpreted or compiled and deoptimizes it if compiled.)
1750 // In this case, we can't call dispatch_next() after the frame is
1751 // popped, but instead must save the incoming arguments and restore
1752 // them after deoptimization has occurred.
1753 //
1754 // Note that we don't compare the return PC against the
1755 // deoptimization blob's unpack entry because of the presence of
1756 // adapter frames in C2.
1757 Label caller_not_deoptimized;
1758 __ ldr(c_rarg1, Address(rfp, frame::return_addr_offset * wordSize));
1759 // This is a return address, so requires authenticating for PAC.
1760 __ authenticate_return_address(c_rarg1, rscratch1);
1761 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1762 InterpreterRuntime::interpreter_contains), c_rarg1);
1763 __ cbnz(r0, caller_not_deoptimized);
1764
1765 // Compute size of arguments for saving when returning to
1766 // deoptimized caller
1767 __ get_method(r0);
1768 __ ldr(r0, Address(r0, Method::const_offset()));
1769 __ load_unsigned_short(r0, Address(r0, in_bytes(ConstMethod::
1770 size_of_parameters_offset())));
1771 __ lsl(r0, r0, Interpreter::logStackElementSize);
1772 __ restore_locals(); // XXX do we need this?
1773 __ sub(rlocals, rlocals, r0);
1774 __ add(rlocals, rlocals, wordSize);
1775 // Save these arguments
1776 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1777 Deoptimization::
1778 popframe_preserve_args),
1779 rthread, r0, rlocals);
1780
1781 __ remove_activation(vtos,
1782 /* throw_monitor_exception */ false,
1783 /* install_monitor_exception */ false,
1784 /* notify_jvmdi */ false);
1785
1786 // Inform deoptimization that it is responsible for restoring
1787 // these arguments
1788 __ mov(rscratch1, JavaThread::popframe_force_deopt_reexecution_bit);
1789 __ strw(rscratch1, Address(rthread, JavaThread::popframe_condition_offset()));
1790
1791 // Continue in deoptimization handler
1792 __ ret(lr);
1793
1794 __ bind(caller_not_deoptimized);
1795 }
1796
1797 __ remove_activation(vtos,
1798 /* throw_monitor_exception */ false,
1799 /* install_monitor_exception */ false,
1800 /* notify_jvmdi */ false);
1801
1802 // Restore the last_sp and null it out
1803 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1804 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1805
1806 __ restore_bcp();
1807 __ restore_locals();
1808 __ restore_constant_pool_cache();
1809 __ get_method(rmethod);
1810 __ get_dispatch();
1811
1812 // The method data pointer was incremented already during
1813 // call profiling. We have to restore the mdp for the current bcp.
1814 if (ProfileInterpreter) {
1815 __ set_method_data_pointer_for_bcp();
1816 }
1817
1818 // Clear the popframe condition flag
1819 __ strw(zr, Address(rthread, JavaThread::popframe_condition_offset()));
1820 assert(JavaThread::popframe_inactive == 0, "fix popframe_inactive");
1821
1822 #if INCLUDE_JVMTI
1823 {
1824 Label L_done;
1825
1826 __ ldrb(rscratch1, Address(rbcp, 0));
1827 __ cmpw(rscratch1, Bytecodes::_invokestatic);
1828 __ br(Assembler::NE, L_done);
1829
1830 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1831 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1832
1833 __ ldr(c_rarg0, Address(rlocals, 0));
1834 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), c_rarg0, rmethod, rbcp);
1835
1836 __ cbz(r0, L_done);
1837
1838 __ str(r0, Address(esp, 0));
1839 __ bind(L_done);
1840 }
1841 #endif // INCLUDE_JVMTI
1842
1843 // Restore machine SP
1844 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
1845 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
1846 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
1847 __ ldr(rscratch2,
1848 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
1849 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
1850 __ andr(sp, rscratch1, -16);
1851
1852 __ dispatch_next(vtos);
1853 // end of PopFrame support
1854
1855 Interpreter::_remove_activation_entry = __ pc();
1856
1857 // preserve exception over this code sequence
1858 __ pop_ptr(r0);
1859 __ str(r0, Address(rthread, JavaThread::vm_result_offset()));
1860 // remove the activation (without doing throws on illegalMonitorExceptions)
1861 __ remove_activation(vtos, false, true, false);
1862 // restore exception
1863 __ get_vm_result(r0, rthread);
1864
1865 // In between activations - previous activation type unknown yet
1866 // compute continuation point - the continuation point expects the
1867 // following registers set up:
1868 //
1869 // r0: exception
1870 // lr: return address/pc that threw exception
1871 // esp: expression stack of caller
1872 // rfp: fp of caller
1873 __ stp(r0, lr, Address(__ pre(sp, -2 * wordSize))); // save exception & return address
1874 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1875 SharedRuntime::exception_handler_for_return_address),
1876 rthread, lr);
1877 __ mov(r1, r0); // save exception handler
1878 __ ldp(r0, lr, Address(__ post(sp, 2 * wordSize))); // restore exception & return address
1879 // We might be returning to a deopt handler that expects r3 to
1880 // contain the exception pc
1881 __ mov(r3, lr);
1882 // Note that an "issuing PC" is actually the next PC after the call
1883 __ br(r1); // jump to exception
1884 // handler of caller
1885 }
1886
1887
1888 //
1889 // JVMTI ForceEarlyReturn support
1890 //
1891 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1892 address entry = __ pc();
1893
1894 __ restore_bcp();
1895 __ restore_locals();
1896 __ empty_expression_stack();
1897 __ load_earlyret_value(state);
1898
1899 __ ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset()));
1900 Address cond_addr(rscratch1, JvmtiThreadState::earlyret_state_offset());
1901
1902 // Clear the earlyret state
1903 assert(JvmtiThreadState::earlyret_inactive == 0, "should be");
1904 __ str(zr, cond_addr);
1905
1906 __ remove_activation(state,
1907 false, /* throw_monitor_exception */
1908 false, /* install_monitor_exception */
1909 true); /* notify_jvmdi */
1910 __ ret(lr);
1911
1912 return entry;
1913 } // end of ForceEarlyReturn support
1914
1915
1916
1917 //-----------------------------------------------------------------------------
1918 // Helper for vtos entry point generation
1919
1920 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1921 address& bep,
1922 address& cep,
1923 address& sep,
1924 address& aep,
1925 address& iep,
1926 address& lep,
1927 address& fep,
1928 address& dep,
1929 address& vep) {
1930 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1931 Label L;
1932 aep = __ pc(); __ push_ptr(); __ b(L);
1933 fep = __ pc(); __ push_f(); __ b(L);
1934 dep = __ pc(); __ push_d(); __ b(L);
1935 lep = __ pc(); __ push_l(); __ b(L);
1936 bep = cep = sep =
1937 iep = __ pc(); __ push_i();
1938 vep = __ pc();
1939 __ bind(L);
1940 generate_and_dispatch(t);
1941 }
1942
1943 //-----------------------------------------------------------------------------
1944
1945 // Non-product code
1946 #ifndef PRODUCT
1947 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1948 address entry = __ pc();
1949
1950 __ protect_return_address();
1951 __ push(lr);
1952 __ push(state);
1953 __ push(RegSet::range(r0, r15), sp);
1954 __ mov(c_rarg2, r0); // Pass itos
1955 __ call_VM(noreg,
1956 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1957 c_rarg1, c_rarg2, c_rarg3);
1958 __ pop(RegSet::range(r0, r15), sp);
1959 __ pop(state);
1960 __ pop(lr);
1961 __ authenticate_return_address();
1962 __ ret(lr); // return from result handler
1963
1964 return entry;
1965 }
1966
1967 void TemplateInterpreterGenerator::count_bytecode() {
1968 Register rscratch3 = r0;
1969 __ push(rscratch1);
1970 __ push(rscratch2);
1971 __ push(rscratch3);
1972 __ mov(rscratch3, (address) &BytecodeCounter::_counter_value);
1973 __ atomic_add(noreg, 1, rscratch3);
1974 __ pop(rscratch3);
1975 __ pop(rscratch2);
1976 __ pop(rscratch1);
1977 }
1978
1979 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { ; }
1980
1981 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { ; }
1982
1983
1984 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1985 // Call a little run-time stub to avoid blow-up for each bytecode.
1986 // The run-time runtime saves the right registers, depending on
1987 // the tosca in-state for the given template.
1988
1989 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1990 "entry must have been generated");
1991 __ bl(Interpreter::trace_code(t->tos_in()));
1992 __ reinit_heapbase();
1993 }
1994
1995
1996 void TemplateInterpreterGenerator::stop_interpreter_at() {
1997 Label L;
1998 __ push(rscratch1);
1999 __ mov(rscratch1, (address) &BytecodeCounter::_counter_value);
2000 __ ldr(rscratch1, Address(rscratch1));
2001 __ mov(rscratch2, StopInterpreterAt);
2002 __ cmpw(rscratch1, rscratch2);
2003 __ br(Assembler::NE, L);
2004 __ brk(0);
2005 __ bind(L);
2006 __ pop(rscratch1);
2007 }
2008
2009 #endif // !PRODUCT