1 /*
2 * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 2020, Red Hat Inc. All rights reserved.
4 * Copyright (c) 2020, 2022, Huawei Technologies Co., Ltd. All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include "precompiled.hpp"
28 #include "asm/macroAssembler.inline.hpp"
29 #include "classfile/javaClasses.hpp"
30 #include "compiler/disassembler.hpp"
31 #include "gc/shared/barrierSetAssembler.hpp"
32 #include "interpreter/bytecodeHistogram.hpp"
33 #include "interpreter/bytecodeTracer.hpp"
34 #include "interpreter/interp_masm.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/interpreterRuntime.hpp"
37 #include "interpreter/templateInterpreterGenerator.hpp"
38 #include "interpreter/templateTable.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "oops/arrayOop.hpp"
41 #include "oops/method.inline.hpp"
42 #include "oops/methodData.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/resolvedIndyEntry.hpp"
45 #include "oops/resolvedMethodEntry.hpp"
46 #include "prims/jvmtiExport.hpp"
47 #include "prims/jvmtiThreadState.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/deoptimization.hpp"
50 #include "runtime/frame.inline.hpp"
51 #include "runtime/globals.hpp"
52 #include "runtime/jniHandles.hpp"
53 #include "runtime/sharedRuntime.hpp"
54 #include "runtime/stubRoutines.hpp"
55 #include "runtime/synchronizer.hpp"
56 #include "runtime/timer.hpp"
57 #include "runtime/vframeArray.hpp"
58 #include "utilities/checkedCast.hpp"
59 #include "utilities/debug.hpp"
60 #include "utilities/powerOfTwo.hpp"
61 #include <sys/types.h>
62
63 #ifndef PRODUCT
64 #include "oops/method.hpp"
65 #endif // !PRODUCT
66
67 // Size of interpreter code. Increase if too small. Interpreter will
68 // fail with a guarantee ("not enough space for interpreter generation");
69 // if too small.
70 // Run with +PrintInterpreter to get the VM to print out the size.
71 // Max size with JVMTI
72 int TemplateInterpreter::InterpreterCodeSize = 256 * 1024;
73
74 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
75
76 //-----------------------------------------------------------------------------
77
78 address TemplateInterpreterGenerator::generate_slow_signature_handler() {
79 address entry = __ pc();
80
81 __ andi(esp, esp, -16);
82 __ mv(c_rarg3, esp);
83 // xmethod
84 // xlocals
85 // c_rarg3: first stack arg - wordSize
86 // adjust sp
87
88 __ addi(sp, c_rarg3, -18 * wordSize);
89 __ addi(sp, sp, -2 * wordSize);
90 __ sd(ra, Address(sp, 0));
91
92 __ call_VM(noreg,
93 CAST_FROM_FN_PTR(address,
94 InterpreterRuntime::slow_signature_handler),
95 xmethod, xlocals, c_rarg3);
96
97 // x10: result handler
98
99 // Stack layout:
100 // sp: return address <- sp
101 // 1 garbage
102 // 8 integer args (if static first is unused)
103 // 1 float/double identifiers
104 // 8 double args
105 // stack args <- esp
106 // garbage
107 // expression stack bottom
108 // bcp (null)
109 // ...
110
111 // Restore ra
112 __ ld(ra, Address(sp, 0));
113 __ addi(sp, sp , 2 * wordSize);
114
115 // Do FP first so we can use c_rarg3 as temp
116 __ lwu(c_rarg3, Address(sp, 9 * wordSize)); // float/double identifiers
117
118 for (int i = 0; i < Argument::n_float_register_parameters_c; i++) {
119 const FloatRegister r = g_FPArgReg[i];
120 Label d, done;
121
122 __ test_bit(t0, c_rarg3, i);
123 __ bnez(t0, d);
124 __ flw(r, Address(sp, (10 + i) * wordSize));
125 __ j(done);
126 __ bind(d);
127 __ fld(r, Address(sp, (10 + i) * wordSize));
128 __ bind(done);
129 }
130
131 // c_rarg0 contains the result from the call of
132 // InterpreterRuntime::slow_signature_handler so we don't touch it
133 // here. It will be loaded with the JNIEnv* later.
134 for (int i = 1; i < Argument::n_int_register_parameters_c; i++) {
135 const Register rm = g_INTArgReg[i];
136 __ ld(rm, Address(sp, i * wordSize));
137 }
138
139 __ addi(sp, sp, 18 * wordSize);
140 __ ret();
141
142 return entry;
143 }
144
145 // Various method entries
146 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
147 // xmethod: Method*
148 // x19_sender_sp: sender sp
149 // esp: args
150
151 // These don't need a safepoint check because they aren't virtually
152 // callable. We won't enter these intrinsics from compiled code.
153 // If in the future we added an intrinsic which was virtually callable
154 // we'd have to worry about how to safepoint so that this code is used.
155
156 // mathematical functions inlined by compiler
157 // (interpreter must provide identical implementation
158 // in order to avoid monotonicity bugs when switching
159 // from interpreter to compiler in the middle of some
160 // computation)
161 //
162 // stack:
163 // [ arg ] <-- esp
164 // [ arg ]
165 // retaddr in ra
166
167 address fn = nullptr;
168 address entry_point = nullptr;
169 switch (kind) {
170 case Interpreter::java_lang_math_abs:
171 entry_point = __ pc();
172 __ fld(f10, Address(esp));
173 __ fabs_d(f10, f10);
174 __ mv(sp, x19_sender_sp); // Restore caller's SP
175 break;
176 case Interpreter::java_lang_math_sqrt:
177 entry_point = __ pc();
178 __ fld(f10, Address(esp));
179 __ fsqrt_d(f10, f10);
180 __ mv(sp, x19_sender_sp);
181 break;
182 case Interpreter::java_lang_math_sin :
183 entry_point = __ pc();
184 __ fld(f10, Address(esp));
185 __ mv(sp, x19_sender_sp);
186 __ mv(x9, ra);
187 if (StubRoutines::dsin() == nullptr) {
188 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
189 } else {
190 fn = CAST_FROM_FN_PTR(address, StubRoutines::dsin());
191 }
192 __ call(fn);
193 __ mv(ra, x9);
194 break;
195 case Interpreter::java_lang_math_cos :
196 entry_point = __ pc();
197 __ fld(f10, Address(esp));
198 __ mv(sp, x19_sender_sp);
199 __ mv(x9, ra);
200 if (StubRoutines::dcos() == nullptr) {
201 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
202 } else {
203 fn = CAST_FROM_FN_PTR(address, StubRoutines::dcos());
204 }
205 __ call(fn);
206 __ mv(ra, x9);
207 break;
208 case Interpreter::java_lang_math_tan :
209 entry_point = __ pc();
210 __ fld(f10, Address(esp));
211 __ mv(sp, x19_sender_sp);
212 __ mv(x9, ra);
213 if (StubRoutines::dtan() == nullptr) {
214 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
215 } else {
216 fn = CAST_FROM_FN_PTR(address, StubRoutines::dtan());
217 }
218 __ call(fn);
219 __ mv(ra, x9);
220 break;
221 case Interpreter::java_lang_math_log :
222 entry_point = __ pc();
223 __ fld(f10, Address(esp));
224 __ mv(sp, x19_sender_sp);
225 __ mv(x9, ra);
226 if (StubRoutines::dlog() == nullptr) {
227 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
228 } else {
229 fn = CAST_FROM_FN_PTR(address, StubRoutines::dlog());
230 }
231 __ call(fn);
232 __ mv(ra, x9);
233 break;
234 case Interpreter::java_lang_math_log10 :
235 entry_point = __ pc();
236 __ fld(f10, Address(esp));
237 __ mv(sp, x19_sender_sp);
238 __ mv(x9, ra);
239 if (StubRoutines::dlog10() == nullptr) {
240 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
241 } else {
242 fn = CAST_FROM_FN_PTR(address, StubRoutines::dlog10());
243 }
244 __ call(fn);
245 __ mv(ra, x9);
246 break;
247 case Interpreter::java_lang_math_exp :
248 entry_point = __ pc();
249 __ fld(f10, Address(esp));
250 __ mv(sp, x19_sender_sp);
251 __ mv(x9, ra);
252 if (StubRoutines::dexp() == nullptr) {
253 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dexp);
254 } else {
255 fn = CAST_FROM_FN_PTR(address, StubRoutines::dexp());
256 }
257 __ call(fn);
258 __ mv(ra, x9);
259 break;
260 case Interpreter::java_lang_math_pow :
261 entry_point = __ pc();
262 __ mv(x9, ra);
263 __ fld(f10, Address(esp, 2 * Interpreter::stackElementSize));
264 __ fld(f11, Address(esp));
265 __ mv(sp, x19_sender_sp);
266 if (StubRoutines::dpow() == nullptr) {
267 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dpow);
268 } else {
269 fn = CAST_FROM_FN_PTR(address, StubRoutines::dpow());
270 }
271 __ call(fn);
272 __ mv(ra, x9);
273 break;
274 case Interpreter::java_lang_math_fmaD :
275 if (UseFMA) {
276 entry_point = __ pc();
277 __ fld(f10, Address(esp, 4 * Interpreter::stackElementSize));
278 __ fld(f11, Address(esp, 2 * Interpreter::stackElementSize));
279 __ fld(f12, Address(esp));
280 __ fmadd_d(f10, f10, f11, f12);
281 __ mv(sp, x19_sender_sp); // Restore caller's SP
282 }
283 break;
284 case Interpreter::java_lang_math_fmaF :
285 if (UseFMA) {
286 entry_point = __ pc();
287 __ flw(f10, Address(esp, 2 * Interpreter::stackElementSize));
288 __ flw(f11, Address(esp, Interpreter::stackElementSize));
289 __ flw(f12, Address(esp));
290 __ fmadd_s(f10, f10, f11, f12);
291 __ mv(sp, x19_sender_sp); // Restore caller's SP
292 }
293 break;
294 default:
295 ;
296 }
297 if (entry_point != nullptr) {
298 __ ret();
299 }
300
301 return entry_point;
302 }
303
304 // Abstract method entry
305 // Attempt to execute abstract method. Throw exception
306 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
307 // xmethod: Method*
308 // x19_sender_sp: sender SP
309
310 address entry_point = __ pc();
311
312 // abstract method entry
313
314 // pop return address, reset last_sp to null
315 __ empty_expression_stack();
316 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
317 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
318
319 // throw exception
320 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
321 InterpreterRuntime::throw_AbstractMethodErrorWithMethod),
322 xmethod);
323 // the call_VM checks for exception, so we should never return here.
324 __ should_not_reach_here();
325
326 return entry_point;
327 }
328
329 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
330 address entry = __ pc();
331
332 #ifdef ASSERT
333 {
334 Label L;
335 __ ld(t0, Address(fp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
336 __ shadd(t0, t0, fp, t0, LogBytesPerWord);
337 // maximal sp for current fp (stack grows negative)
338 // check if frame is complete
339 __ bge(t0, sp, L);
340 __ stop ("interpreter frame not set up");
341 __ bind(L);
342 }
343 #endif // ASSERT
344 // Restore bcp under the assumption that the current frame is still
345 // interpreted
346 __ restore_bcp();
347
348 // expression stack must be empty before entering the VM if an
349 // exception happened
350 __ empty_expression_stack();
351 // throw exception
352 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
353 return entry;
354 }
355
356 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
357 address entry = __ pc();
358 // expression stack must be empty before entering the VM if an
359 // exception happened
360 __ empty_expression_stack();
361 // setup parameters
362
363 // convention: expect aberrant index in register x11
364 __ zero_extend(c_rarg2, x11, 32);
365 // convention: expect array in register x13
366 __ mv(c_rarg1, x13);
367 __ call_VM(noreg,
368 CAST_FROM_FN_PTR(address,
369 InterpreterRuntime::
370 throw_ArrayIndexOutOfBoundsException),
371 c_rarg1, c_rarg2);
372 return entry;
373 }
374
375 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
376 address entry = __ pc();
377
378 // object is at TOS
379 __ pop_reg(c_rarg1);
380
381 // expression stack must be empty before entering the VM if an
382 // exception happened
383 __ empty_expression_stack();
384
385 __ call_VM(noreg,
386 CAST_FROM_FN_PTR(address,
387 InterpreterRuntime::
388 throw_ClassCastException),
389 c_rarg1);
390 return entry;
391 }
392
393 address TemplateInterpreterGenerator::generate_exception_handler_common(
394 const char* name, const char* message, bool pass_oop) {
395 assert(!pass_oop || message == nullptr, "either oop or message but not both");
396 address entry = __ pc();
397 if (pass_oop) {
398 // object is at TOS
399 __ pop_reg(c_rarg2);
400 }
401 // expression stack must be empty before entering the VM if an
402 // exception happened
403 __ empty_expression_stack();
404 // setup parameters
405 __ la(c_rarg1, Address((address)name));
406 if (pass_oop) {
407 __ call_VM(x10, CAST_FROM_FN_PTR(address,
408 InterpreterRuntime::
409 create_klass_exception),
410 c_rarg1, c_rarg2);
411 } else {
412 // kind of lame ExternalAddress can't take null because
413 // external_word_Relocation will assert.
414 if (message != nullptr) {
415 __ la(c_rarg2, Address((address)message));
416 } else {
417 __ mv(c_rarg2, NULL_WORD);
418 }
419 __ call_VM(x10,
420 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
421 c_rarg1, c_rarg2);
422 }
423 // throw exception
424 __ j(RuntimeAddress(Interpreter::throw_exception_entry()));
425 return entry;
426 }
427
428 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
429 address entry = __ pc();
430
431 // Restore stack bottom in case i2c adjusted stack
432 __ ld(t0, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
433 __ shadd(esp, t0, fp, t0, LogBytesPerWord);
434 // and null it as marker that esp is now tos until next java call
435 __ sd(zr, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
436 __ restore_bcp();
437 __ restore_locals();
438 __ restore_constant_pool_cache();
439 __ get_method(xmethod);
440
441 if (state == atos) {
442 Register obj = x10;
443 Register mdp = x11;
444 Register tmp = x12;
445 __ ld(mdp, Address(xmethod, Method::method_data_offset()));
446 __ profile_return_type(mdp, obj, tmp);
447 }
448
449 const Register cache = x11;
450 const Register index = x12;
451
452 if (index_size == sizeof(u4)) {
453 __ load_resolved_indy_entry(cache, index);
454 __ load_unsigned_short(cache, Address(cache, in_bytes(ResolvedIndyEntry::num_parameters_offset())));
455 __ shadd(esp, cache, esp, t0, 3);
456 } else {
457 // Pop N words from the stack
458 assert(index_size == sizeof(u2), "Can only be u2");
459 __ load_method_entry(cache, index);
460 __ load_unsigned_short(cache, Address(cache, in_bytes(ResolvedMethodEntry::num_parameters_offset())));
461
462 __ shadd(esp, cache, esp, t0, 3);
463 }
464
465 // Restore machine SP
466 __ restore_sp_after_call();
467
468 __ check_and_handle_popframe(xthread);
469 __ check_and_handle_earlyret(xthread);
470
471 __ get_dispatch();
472 __ dispatch_next(state, step);
473
474 return entry;
475 }
476
477 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
478 int step,
479 address continuation) {
480 address entry = __ pc();
481 __ restore_bcp();
482 __ restore_locals();
483 __ restore_constant_pool_cache();
484 __ get_method(xmethod);
485 __ get_dispatch();
486
487 __ restore_sp_after_call(); // Restore SP to extended SP
488
489 // Restore expression stack pointer
490 __ ld(t0, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
491 __ shadd(esp, t0, fp, t0, LogBytesPerWord);
492 // null last_sp until next java call
493 __ sd(zr, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
494
495 // handle exceptions
496 {
497 Label L;
498 __ ld(t0, Address(xthread, Thread::pending_exception_offset()));
499 __ beqz(t0, L);
500 __ call_VM(noreg,
501 CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
502 __ should_not_reach_here();
503 __ bind(L);
504 }
505
506 if (continuation == nullptr) {
507 __ dispatch_next(state, step);
508 } else {
509 __ jump_to_entry(continuation);
510 }
511 return entry;
512 }
513
514 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
515 address entry = __ pc();
516 if (type == T_OBJECT) {
517 // retrieve result from frame
518 __ ld(x10, Address(fp, frame::interpreter_frame_oop_temp_offset * wordSize));
519 // and verify it
520 __ verify_oop(x10);
521 } else {
522 __ cast_primitive_type(type, x10);
523 }
524
525 __ ret(); // return from result handler
526 return entry;
527 }
528
529 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state,
530 address runtime_entry) {
531 assert_cond(runtime_entry != nullptr);
532 address entry = __ pc();
533 __ push(state);
534 __ push_cont_fastpath(xthread);
535 __ call_VM(noreg, runtime_entry);
536 __ pop_cont_fastpath(xthread);
537 __ membar(MacroAssembler::AnyAny);
538 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
539 return entry;
540 }
541
542 address TemplateInterpreterGenerator::generate_cont_resume_interpreter_adapter() {
543 if (!Continuations::enabled()) return nullptr;
544 address start = __ pc();
545
546 __ restore_bcp();
547 __ restore_locals();
548
549 // Restore constant pool cache
550 __ ld(xcpool, Address(fp, frame::interpreter_frame_cache_offset * wordSize));
551
552 // Restore Java expression stack pointer
553 __ ld(t0, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
554 __ shadd(esp, t0, fp, t0, Interpreter::logStackElementSize);
555 // and NULL it as marker that esp is now tos until next java call
556 __ sd(zr, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
557
558 // Restore machine SP
559 __ ld(t0, Address(fp, frame::interpreter_frame_extended_sp_offset * wordSize));
560 __ shadd(sp, t0, fp, t0, LogBytesPerWord);
561
562 // Restore method
563 __ ld(xmethod, Address(fp, frame::interpreter_frame_method_offset * wordSize));
564
565 // Restore dispatch
566 __ la(xdispatch, ExternalAddress((address)Interpreter::dispatch_table()));
567
568 __ ret();
569
570 return start;
571 }
572
573
574 // Helpers for commoning out cases in the various type of method entries.
575 //
576
577
578 // increment invocation count & check for overflow
579 //
580 // Note: checking for negative value instead of overflow
581 // so we have a 'sticky' overflow test
582 //
583 // xmethod: method
584 //
585 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow) {
586 Label done;
587 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
588 int increment = InvocationCounter::count_increment;
589 Label no_mdo;
590 if (ProfileInterpreter) {
591 // Are we profiling?
592 __ ld(x10, Address(xmethod, Method::method_data_offset()));
593 __ beqz(x10, no_mdo);
594 // Increment counter in the MDO
595 const Address mdo_invocation_counter(x10, in_bytes(MethodData::invocation_counter_offset()) +
596 in_bytes(InvocationCounter::counter_offset()));
597 const Address mask(x10, in_bytes(MethodData::invoke_mask_offset()));
598 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, t0, t1, false, overflow);
599 __ j(done);
600 }
601 __ bind(no_mdo);
602 // Increment counter in MethodCounters
603 const Address invocation_counter(t1,
604 MethodCounters::invocation_counter_offset() +
605 InvocationCounter::counter_offset());
606 __ get_method_counters(xmethod, t1, done);
607 const Address mask(t1, in_bytes(MethodCounters::invoke_mask_offset()));
608 __ increment_mask_and_jump(invocation_counter, increment, mask, t0, x11, false, overflow);
609 __ bind(done);
610 }
611
612 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
613 __ mv(c_rarg1, zr);
614 __ call_VM(noreg,
615 CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), c_rarg1);
616 __ j(do_continue);
617 }
618
619 // See if we've got enough room on the stack for locals plus overhead
620 // below JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
621 // without going through the signal handler, i.e., reserved and yellow zones
622 // will not be made usable. The shadow zone must suffice to handle the
623 // overflow.
624 // The expression stack grows down incrementally, so the normal guard
625 // page mechanism will work for that.
626 //
627 // NOTE: Since the additional locals are also always pushed (wasn't
628 // obvious in generate_method_entry) so the guard should work for them
629 // too.
630 //
631 // Args:
632 // x13: number of additional locals this frame needs (what we must check)
633 // xmethod: Method*
634 //
635 // Kills:
636 // x10
637 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
638
639 // monitor entry size: see picture of stack set
640 // (generate_method_entry) and frame_amd64.hpp
641 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
642
643 // total overhead size: entry_size + (saved fp through expr stack
644 // bottom). be sure to change this if you add/subtract anything
645 // to/from the overhead area
646 const int overhead_size =
647 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
648
649 const int page_size = (int)os::vm_page_size();
650
651 Label after_frame_check;
652
653 // see if the frame is greater than one page in size. If so,
654 // then we need to verify there is enough stack space remaining
655 // for the additional locals.
656 __ mv(t0, (page_size - overhead_size) / Interpreter::stackElementSize);
657 __ bleu(x13, t0, after_frame_check);
658
659 // compute sp as if this were going to be the last frame on
660 // the stack before the red zone
661
662 // locals + overhead, in bytes
663 __ mv(x10, overhead_size);
664 __ shadd(x10, x13, x10, t0, Interpreter::logStackElementSize); // 2 slots per parameter.
665
666 const Address stack_limit(xthread, JavaThread::stack_overflow_limit_offset());
667 __ ld(t0, stack_limit);
668
669 #ifdef ASSERT
670 Label limit_okay;
671 // Verify that thread stack limit is non-zero.
672 __ bnez(t0, limit_okay);
673 __ stop("stack overflow limit is zero");
674 __ bind(limit_okay);
675 #endif
676
677 // Add stack limit to locals.
678 __ add(x10, x10, t0);
679
680 // Check against the current stack bottom.
681 __ bgtu(sp, x10, after_frame_check);
682
683 // Remove the incoming args, peeling the machine SP back to where it
684 // was in the caller. This is not strictly necessary, but unless we
685 // do so the stack frame may have a garbage FP; this ensures a
686 // correct call stack that we can always unwind. The ANDI should be
687 // unnecessary because the sender SP in x19 is always aligned, but
688 // it doesn't hurt.
689 __ andi(sp, x19_sender_sp, -16);
690
691 // Note: the restored frame is not necessarily interpreted.
692 // Use the shared runtime version of the StackOverflowError.
693 assert(SharedRuntime::throw_StackOverflowError_entry() != nullptr, "stub not yet generated");
694 __ far_jump(RuntimeAddress(SharedRuntime::throw_StackOverflowError_entry()));
695
696 // all done with frame size check
697 __ bind(after_frame_check);
698 }
699
700 // Allocate monitor and lock method (asm interpreter)
701 //
702 // Args:
703 // xmethod: Method*
704 // xlocals: locals
705 //
706 // Kills:
707 // x10
708 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
709 // t0, t1 (temporary regs)
710 void TemplateInterpreterGenerator::lock_method() {
711 // synchronize method
712 const Address access_flags(xmethod, Method::access_flags_offset());
713 const Address monitor_block_top(fp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
714 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
715
716 #ifdef ASSERT
717 __ lwu(x10, access_flags);
718 __ verify_access_flags(x10, JVM_ACC_SYNCHRONIZED, "method doesn't need synchronization", false);
719 #endif // ASSERT
720
721 // get synchronization object
722 {
723 Label done;
724 __ lwu(x10, access_flags);
725 __ andi(t0, x10, JVM_ACC_STATIC);
726 // get receiver (assume this is frequent case)
727 __ ld(x10, Address(xlocals, Interpreter::local_offset_in_bytes(0)));
728 __ beqz(t0, done);
729 __ load_mirror(x10, xmethod, x15, t1);
730
731 #ifdef ASSERT
732 {
733 Label L;
734 __ bnez(x10, L);
735 __ stop("synchronization object is null");
736 __ bind(L);
737 }
738 #endif // ASSERT
739
740 __ bind(done);
741 }
742
743 // add space for monitor & lock
744 __ check_extended_sp();
745 __ add(sp, sp, - entry_size); // add space for a monitor entry
746 __ add(esp, esp, - entry_size);
747 __ sub(t0, sp, fp);
748 __ srai(t0, t0, Interpreter::logStackElementSize);
749 __ sd(t0, Address(fp, frame::interpreter_frame_extended_sp_offset * wordSize));
750 __ sub(t0, esp, fp);
751 __ srai(t0, t0, Interpreter::logStackElementSize);
752 __ sd(t0, monitor_block_top); // set new monitor block top
753 // store object
754 __ sd(x10, Address(esp, BasicObjectLock::obj_offset()));
755 __ mv(c_rarg1, esp); // object address
756 __ lock_object(c_rarg1);
757 }
758
759 // Generate a fixed interpreter frame. This is identical setup for
760 // interpreted methods and for native methods hence the shared code.
761 //
762 // Args:
763 // ra: return address
764 // xmethod: Method*
765 // xlocals: pointer to locals
766 // xcpool: cp cache
767 // stack_pointer: previous sp
768 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
769 // initialize fixed part of activation frame
770 if (native_call) {
771 __ add(esp, sp, - 14 * wordSize);
772 __ mv(xbcp, zr);
773 __ add(sp, sp, - 14 * wordSize);
774 // add 2 zero-initialized slots for native calls
775 __ sd(zr, Address(sp, 13 * wordSize));
776 __ sd(zr, Address(sp, 12 * wordSize));
777 } else {
778 __ add(esp, sp, - 12 * wordSize);
779 __ ld(t0, Address(xmethod, Method::const_offset())); // get ConstMethod
780 __ add(xbcp, t0, in_bytes(ConstMethod::codes_offset())); // get codebase
781 __ add(sp, sp, - 12 * wordSize);
782 }
783 __ sd(xbcp, Address(sp, wordSize));
784 __ mv(t0, frame::interpreter_frame_initial_sp_offset);
785 __ sd(t0, Address(sp, 0));
786
787 if (ProfileInterpreter) {
788 Label method_data_continue;
789 __ ld(t0, Address(xmethod, Method::method_data_offset()));
790 __ beqz(t0, method_data_continue);
791 __ la(t0, Address(t0, in_bytes(MethodData::data_offset())));
792 __ bind(method_data_continue);
793 }
794
795 __ sd(xmethod, Address(sp, 7 * wordSize));
796 __ sd(ProfileInterpreter ? t0 : zr, Address(sp, 6 * wordSize));
797
798 __ sd(ra, Address(sp, 11 * wordSize));
799 __ sd(fp, Address(sp, 10 * wordSize));
800 __ la(fp, Address(sp, 12 * wordSize)); // include ra & fp
801
802 __ ld(xcpool, Address(xmethod, Method::const_offset()));
803 __ ld(xcpool, Address(xcpool, ConstMethod::constants_offset()));
804 __ ld(xcpool, Address(xcpool, ConstantPool::cache_offset()));
805 __ sd(xcpool, Address(sp, 3 * wordSize));
806 __ sub(t0, xlocals, fp);
807 __ srai(t0, t0, Interpreter::logStackElementSize); // t0 = xlocals - fp();
808 // Store relativized xlocals, see frame::interpreter_frame_locals().
809 __ sd(t0, Address(sp, 2 * wordSize));
810
811 // set sender sp
812 // leave last_sp as null
813 __ sd(x19_sender_sp, Address(sp, 9 * wordSize));
814 __ sd(zr, Address(sp, 8 * wordSize));
815
816 // Get mirror and store it in the frame as GC root for this Method*
817 __ load_mirror(t2, xmethod, x15, t1);
818 __ sd(t2, Address(sp, 4 * wordSize));
819
820 if (!native_call) {
821 __ ld(t0, Address(xmethod, Method::const_offset()));
822 __ lhu(t0, Address(t0, ConstMethod::max_stack_offset()));
823 __ add(t0, t0, MAX2(3, Method::extra_stack_entries()));
824 __ slli(t0, t0, 3);
825 __ sub(t0, sp, t0);
826 __ andi(t0, t0, -16);
827 __ sub(t1, t0, fp);
828 __ srai(t1, t1, Interpreter::logStackElementSize);
829 // Store extended SP
830 __ sd(t1, Address(sp, 5 * wordSize));
831 // Move SP out of the way
832 __ mv(sp, t0);
833 } else {
834 // Make sure there is room for the exception oop pushed in case method throws
835 // an exception (see TemplateInterpreterGenerator::generate_throw_exception())
836 __ sub(t0, sp, 2 * wordSize);
837 __ sub(t1, t0, fp);
838 __ srai(t1, t1, Interpreter::logStackElementSize);
839 __ sd(t1, Address(sp, 5 * wordSize));
840 __ mv(sp, t0);
841 }
842 }
843
844 // End of helpers
845
846 // Various method entries
847 //------------------------------------------------------------------------------------------------------------------------
848 //
849 //
850
851 // Method entry for java.lang.ref.Reference.get.
852 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
853 // Code: _aload_0, _getfield, _areturn
854 // parameter size = 1
855 //
856 // The code that gets generated by this routine is split into 2 parts:
857 // 1. The "intrinsified" code for G1 (or any SATB based GC),
858 // 2. The slow path - which is an expansion of the regular method entry.
859 //
860 // Notes:-
861 // * In the G1 code we do not check whether we need to block for
862 // a safepoint. If G1 is enabled then we must execute the specialized
863 // code for Reference.get (except when the Reference object is null)
864 // so that we can log the value in the referent field with an SATB
865 // update buffer.
866 // If the code for the getfield template is modified so that the
867 // G1 pre-barrier code is executed when the current method is
868 // Reference.get() then going through the normal method entry
869 // will be fine.
870 // * The G1 code can, however, check the receiver object (the instance
871 // of java.lang.Reference) and jump to the slow path if null. If the
872 // Reference object is null then we obviously cannot fetch the referent
873 // and so we don't need to call the G1 pre-barrier. Thus we can use the
874 // regular method entry code to generate the NPE.
875 //
876 // This code is based on generate_accessor_entry.
877 //
878 // xmethod: Method*
879 // x19_sender_sp: senderSP must preserve for slow path, set SP to it on fast path
880
881 // ra is live. It must be saved around calls.
882
883 address entry = __ pc();
884
885 const int referent_offset = java_lang_ref_Reference::referent_offset();
886 guarantee(referent_offset > 0, "referent offset not initialized");
887
888 Label slow_path;
889 const Register local_0 = c_rarg0;
890 // Check if local 0 isn't null
891 // If the receiver is null then it is OK to jump to the slow path.
892 __ ld(local_0, Address(esp, 0));
893 __ beqz(local_0, slow_path);
894
895 // Load the value of the referent field.
896 const Address field_address(local_0, referent_offset);
897 BarrierSetAssembler *bs = BarrierSet::barrier_set()->barrier_set_assembler();
898 bs->load_at(_masm, IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT, local_0, field_address, /*tmp1*/ t0, /*tmp2*/ t1);
899
900 // areturn
901 __ andi(sp, x19_sender_sp, -16); // done with stack
902 __ ret();
903
904 // generate a vanilla interpreter entry as the slow path
905 __ bind(slow_path);
906 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
907 return entry;
908 }
909
910 /**
911 * Method entry for static native methods:
912 * int java.util.zip.CRC32.update(int crc, int b)
913 */
914 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
915 // TODO: Unimplemented generate_CRC32_update_entry
916 return nullptr;
917 }
918
919 /**
920 * Method entry for static native methods:
921 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
922 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
923 */
924 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
925 // TODO: Unimplemented generate_CRC32_updateBytes_entry
926 return nullptr;
927 }
928
929 /**
930 * Method entry for intrinsic-candidate (non-native) methods:
931 * int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end)
932 * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long buf, int off, int end)
933 * Unlike CRC32, CRC32C does not have any methods marked as native
934 * CRC32C also uses an "end" variable instead of the length variable CRC32 uses
935 */
936 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
937 // TODO: Unimplemented generate_CRC32C_updateBytes_entry
938 return nullptr;
939 }
940
941 // Not supported
942 address TemplateInterpreterGenerator::generate_Float_intBitsToFloat_entry() { return nullptr; }
943 address TemplateInterpreterGenerator::generate_Float_floatToRawIntBits_entry() { return nullptr; }
944 address TemplateInterpreterGenerator::generate_Double_longBitsToDouble_entry() { return nullptr; }
945 address TemplateInterpreterGenerator::generate_Double_doubleToRawLongBits_entry() { return nullptr; }
946 address TemplateInterpreterGenerator::generate_Float_float16ToFloat_entry() { return nullptr; }
947 address TemplateInterpreterGenerator::generate_Float_floatToFloat16_entry() { return nullptr; }
948
949 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
950 // See more discussion in stackOverflow.hpp.
951
952 const int shadow_zone_size = checked_cast<int>(StackOverflow::stack_shadow_zone_size());
953 const int page_size = (int)os::vm_page_size();
954 const int n_shadow_pages = shadow_zone_size / page_size;
955
956 #ifdef ASSERT
957 Label L_good_limit;
958 __ ld(t0, Address(xthread, JavaThread::shadow_zone_safe_limit()));
959 __ bnez(t0, L_good_limit);
960 __ stop("shadow zone safe limit is not initialized");
961 __ bind(L_good_limit);
962
963 Label L_good_watermark;
964 __ ld(t0, Address(xthread, JavaThread::shadow_zone_growth_watermark()));
965 __ bnez(t0, L_good_watermark);
966 __ stop("shadow zone growth watermark is not initialized");
967 __ bind(L_good_watermark);
968 #endif
969
970 Label L_done;
971
972 __ ld(t0, Address(xthread, JavaThread::shadow_zone_growth_watermark()));
973 __ bgtu(sp, t0, L_done);
974
975 for (int p = 1; p <= n_shadow_pages; p++) {
976 __ bang_stack_with_offset(p * page_size);
977 }
978
979 // Record the new watermark, but only if the update is above the safe limit.
980 // Otherwise, the next time around the check above would pass the safe limit.
981 __ ld(t0, Address(xthread, JavaThread::shadow_zone_safe_limit()));
982 __ bleu(sp, t0, L_done);
983 __ sd(sp, Address(xthread, JavaThread::shadow_zone_growth_watermark()));
984
985 __ bind(L_done);
986 }
987
988 // Interpreter stub for calling a native method. (asm interpreter)
989 // This sets up a somewhat different looking stack for calling the
990 // native method than the typical interpreter frame setup.
991 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized, bool runtime_upcalls) {
992 // determine code generation flags
993 bool inc_counter = UseCompiler || CountCompiledCalls;
994
995 // x11: Method*
996 // x30: sender sp
997
998 address entry_point = __ pc();
999
1000 const Address constMethod (xmethod, Method::const_offset());
1001 const Address access_flags (xmethod, Method::access_flags_offset());
1002 const Address size_of_parameters(x12, ConstMethod::
1003 size_of_parameters_offset());
1004
1005 // get parameter size (always needed)
1006 __ ld(x12, constMethod);
1007 __ load_unsigned_short(x12, size_of_parameters);
1008
1009 // Native calls don't need the stack size check since they have no
1010 // expression stack and the arguments are already on the stack and
1011 // we only add a handful of words to the stack.
1012
1013 // xmethod: Method*
1014 // x12: size of parameters
1015 // x30: sender sp
1016
1017 // for natives the size of locals is zero
1018
1019 // compute beginning of parameters (xlocals)
1020 __ shadd(xlocals, x12, esp, xlocals, 3);
1021 __ addi(xlocals, xlocals, -wordSize);
1022
1023 // Pull SP back to minimum size: this avoids holes in the stack
1024 __ andi(sp, esp, -16);
1025
1026 // initialize fixed part of activation frame
1027 generate_fixed_frame(true);
1028
1029 // make sure method is native & not abstract
1030 #ifdef ASSERT
1031 __ lwu(x10, access_flags);
1032 __ verify_access_flags(x10, JVM_ACC_NATIVE, "tried to execute non-native method as native", false);
1033 __ verify_access_flags(x10, JVM_ACC_ABSTRACT, "tried to execute abstract method in interpreter");
1034 #endif
1035
1036 // Since at this point in the method invocation the exception
1037 // handler would try to exit the monitor of synchronized methods
1038 // which hasn't been entered yet, we set the thread local variable
1039 // _do_not_unlock_if_synchronized to true. The remove_activation
1040 // will check this flag.
1041
1042 const Address do_not_unlock_if_synchronized(xthread,
1043 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1044 __ mv(t1, true);
1045 __ sb(t1, do_not_unlock_if_synchronized);
1046
1047 // increment invocation count & check for overflow
1048 Label invocation_counter_overflow;
1049 if (inc_counter) {
1050 generate_counter_incr(&invocation_counter_overflow);
1051 }
1052
1053 Label continue_after_compile;
1054 __ bind(continue_after_compile);
1055
1056 bang_stack_shadow_pages(true);
1057
1058 // reset the _do_not_unlock_if_synchronized flag
1059 __ sb(zr, do_not_unlock_if_synchronized);
1060
1061 // check for synchronized methods
1062 // Must happen AFTER invocation_counter check and stack overflow check,
1063 // so method is not locked if overflows.
1064 if (synchronized) {
1065 lock_method();
1066 } else {
1067 // no synchronization necessary
1068 #ifdef ASSERT
1069 __ lwu(x10, access_flags);
1070 __ verify_access_flags(x10, JVM_ACC_SYNCHRONIZED, "method needs synchronization");
1071 #endif
1072 }
1073
1074 // start execution
1075 #ifdef ASSERT
1076 __ verify_frame_setup();
1077 #endif
1078
1079 // jvmti support
1080 __ notify_method_entry();
1081
1082 // work registers
1083 const Register t = x18;
1084 const Register result_handler = x19;
1085
1086 // allocate space for parameters
1087 __ ld(t, Address(xmethod, Method::const_offset()));
1088 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1089
1090 __ slli(t, t, Interpreter::logStackElementSize);
1091 __ sub(x30, esp, t);
1092 __ andi(sp, x30, -16);
1093 __ mv(esp, x30);
1094
1095 // get signature handler
1096 {
1097 Label L;
1098 __ ld(t, Address(xmethod, Method::signature_handler_offset()));
1099 __ bnez(t, L);
1100 __ call_VM(noreg,
1101 CAST_FROM_FN_PTR(address,
1102 InterpreterRuntime::prepare_native_call),
1103 xmethod);
1104 __ ld(t, Address(xmethod, Method::signature_handler_offset()));
1105 __ bind(L);
1106 }
1107
1108 // call signature handler
1109 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == xlocals,
1110 "adjust this code");
1111 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == sp,
1112 "adjust this code");
1113 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t0,
1114 "adjust this code");
1115
1116 // The generated handlers do not touch xmethod (the method).
1117 // However, large signatures cannot be cached and are generated
1118 // each time here. The slow-path generator can do a GC on return,
1119 // so we must reload it after the call.
1120 __ jalr(t);
1121 __ get_method(xmethod); // slow path can do a GC, reload xmethod
1122
1123
1124 // result handler is in x10
1125 // set result handler
1126 __ mv(result_handler, x10);
1127 // Save it in the frame in case of preemption; we cannot rely on callee saved registers.
1128 __ sd(x10, Address(fp, frame::interpreter_frame_result_handler_offset * wordSize));
1129
1130 // pass mirror handle if static call
1131 {
1132 Label L;
1133 __ lwu(t, Address(xmethod, Method::access_flags_offset()));
1134 __ test_bit(t0, t, exact_log2(JVM_ACC_STATIC));
1135 __ beqz(t0, L);
1136 // get mirror
1137 __ load_mirror(t, xmethod, x28, t1);
1138 // copy mirror into activation frame
1139 __ sd(t, Address(fp, frame::interpreter_frame_oop_temp_offset * wordSize));
1140 // pass handle to mirror
1141 __ addi(c_rarg1, fp, frame::interpreter_frame_oop_temp_offset * wordSize);
1142 __ bind(L);
1143 }
1144
1145 // get native function entry point in x28
1146 {
1147 Label L;
1148 __ ld(x28, Address(xmethod, Method::native_function_offset()));
1149 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1150 __ la(t, unsatisfied);
1151 __ load_long_misaligned(t1, Address(t, 0), t0, 2); // 2 bytes aligned, but not 4 or 8
1152
1153 __ bne(x28, t1, L);
1154 __ call_VM(noreg,
1155 CAST_FROM_FN_PTR(address,
1156 InterpreterRuntime::prepare_native_call),
1157 xmethod);
1158 __ get_method(xmethod);
1159 __ ld(x28, Address(xmethod, Method::native_function_offset()));
1160 __ bind(L);
1161 }
1162
1163 // pass JNIEnv
1164 __ add(c_rarg0, xthread, in_bytes(JavaThread::jni_environment_offset()));
1165
1166 // It is enough that the pc() points into the right code
1167 // segment. It does not have to be the correct return pc.
1168 // For convenience we use the pc we want to resume to in
1169 // case of preemption on Object.wait.
1170 Label native_return;
1171 __ set_last_Java_frame(esp, fp, native_return, x30);
1172
1173 // change thread state
1174 #ifdef ASSERT
1175 {
1176 Label L;
1177 __ lwu(t, Address(xthread, JavaThread::thread_state_offset()));
1178 __ addi(t0, zr, (u1)_thread_in_Java);
1179 __ beq(t, t0, L);
1180 __ stop("Wrong thread state in native stub");
1181 __ bind(L);
1182 }
1183 #endif
1184
1185 // Change state to native
1186 __ la(t1, Address(xthread, JavaThread::thread_state_offset()));
1187 __ mv(t0, _thread_in_native);
1188 __ membar(MacroAssembler::LoadStore | MacroAssembler::StoreStore);
1189 __ sw(t0, Address(t1));
1190
1191 __ push_cont_fastpath();
1192
1193 // Call the native method.
1194 __ jalr(x28);
1195
1196 __ pop_cont_fastpath();
1197
1198 __ get_method(xmethod);
1199 // result potentially in x10 or f10
1200
1201 // Restore cpu control state after JNI call
1202 __ restore_cpu_control_state_after_jni(t0);
1203
1204 // make room for the pushes we're about to do
1205 __ sub(t0, esp, 4 * wordSize);
1206 __ andi(sp, t0, -16);
1207
1208 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1209 // in order to extract the result of a method call. If the order of these
1210 // pushes change or anything else is added to the stack then the code in
1211 // interpreter_frame_result must also change.
1212 __ push(dtos);
1213 __ push(ltos);
1214
1215 // change thread state
1216 // Force all preceding writes to be observed prior to thread state change
1217 __ membar(MacroAssembler::LoadStore | MacroAssembler::StoreStore);
1218
1219 __ mv(t0, _thread_in_native_trans);
1220 __ sw(t0, Address(xthread, JavaThread::thread_state_offset()));
1221
1222 // Force this write out before the read below
1223 if (!UseSystemMemoryBarrier) {
1224 __ membar(MacroAssembler::AnyAny);
1225 }
1226
1227 // check for safepoint operation in progress and/or pending suspend requests
1228 {
1229 Label L, Continue;
1230
1231 // We need an acquire here to ensure that any subsequent load of the
1232 // global SafepointSynchronize::_state flag is ordered after this load
1233 // of the thread-local polling word. We don't want this poll to
1234 // return false (i.e. not safepointing) and a later poll of the global
1235 // SafepointSynchronize::_state spuriously to return true.
1236 //
1237 // This is to avoid a race when we're in a native->Java transition
1238 // racing the code which wakes up from a safepoint.
1239 __ safepoint_poll(L, true /* at_return */, true /* acquire */, false /* in_nmethod */);
1240 __ lwu(t1, Address(xthread, JavaThread::suspend_flags_offset()));
1241 __ beqz(t1, Continue);
1242 __ bind(L);
1243
1244 // Don't use call_VM as it will see a possible pending exception
1245 // and forward it and never return here preventing us from
1246 // clearing _last_native_pc down below. So we do a runtime call by
1247 // hand.
1248 //
1249 __ mv(c_rarg0, xthread);
1250 __ rt_call(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
1251 __ get_method(xmethod);
1252 __ reinit_heapbase();
1253 __ bind(Continue);
1254 }
1255
1256 // change thread state
1257 // Force all preceding writes to be observed prior to thread state change
1258 __ membar(MacroAssembler::LoadStore | MacroAssembler::StoreStore);
1259
1260 __ mv(t0, _thread_in_Java);
1261 __ sw(t0, Address(xthread, JavaThread::thread_state_offset()));
1262
1263 if (LockingMode != LM_LEGACY) {
1264 // Check preemption for Object.wait()
1265 Label not_preempted;
1266 __ ld(t1, Address(xthread, JavaThread::preempt_alternate_return_offset()));
1267 __ beqz(t1, not_preempted);
1268 __ sd(zr, Address(xthread, JavaThread::preempt_alternate_return_offset()));
1269 __ jr(t1);
1270 __ bind(native_return);
1271 __ restore_after_resume(true /* is_native */);
1272 // reload result_handler
1273 __ ld(result_handler, Address(fp, frame::interpreter_frame_result_handler_offset * wordSize));
1274 __ bind(not_preempted);
1275 } else {
1276 // any pc will do so just use this one for LM_LEGACY to keep code together.
1277 __ bind(native_return);
1278 }
1279
1280 // reset_last_Java_frame
1281 __ reset_last_Java_frame(true);
1282
1283 if (CheckJNICalls) {
1284 // clear_pending_jni_exception_check
1285 __ sd(zr, Address(xthread, JavaThread::pending_jni_exception_check_fn_offset()));
1286 }
1287
1288 // reset handle block
1289 __ ld(t, Address(xthread, JavaThread::active_handles_offset()));
1290 __ sd(zr, Address(t, JNIHandleBlock::top_offset()));
1291
1292 // If result is an oop unbox and store it in frame where gc will see it
1293 // and result handler will pick it up
1294
1295 {
1296 Label no_oop;
1297 __ la(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1298 __ bne(t, result_handler, no_oop);
1299 // Unbox oop result, e.g. JNIHandles::resolve result.
1300 __ pop(ltos);
1301 __ resolve_jobject(x10, t, t1);
1302 __ sd(x10, Address(fp, frame::interpreter_frame_oop_temp_offset * wordSize));
1303 // keep stack depth as expected by pushing oop which will eventually be discarded
1304 __ push(ltos);
1305 __ bind(no_oop);
1306 }
1307
1308 {
1309 Label no_reguard;
1310 __ lwu(t0, Address(xthread, in_bytes(JavaThread::stack_guard_state_offset())));
1311 __ addi(t1, zr, (u1)StackOverflow::stack_guard_yellow_reserved_disabled);
1312 __ bne(t0, t1, no_reguard);
1313
1314 __ push_call_clobbered_registers();
1315 __ mv(c_rarg0, xthread);
1316 __ rt_call(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages));
1317 __ pop_call_clobbered_registers();
1318 __ bind(no_reguard);
1319 }
1320
1321 // The method register is junk from after the thread_in_native transition
1322 // until here. Also can't call_VM until the bcp has been
1323 // restored. Need bcp for throwing exception below so get it now.
1324 __ get_method(xmethod);
1325
1326 // restore bcp to have legal interpreter frame, i.e., bci == 0 <=>
1327 // xbcp == code_base()
1328 __ ld(xbcp, Address(xmethod, Method::const_offset())); // get ConstMethod*
1329 __ add(xbcp, xbcp, in_bytes(ConstMethod::codes_offset())); // get codebase
1330 // handle exceptions (exception handling will handle unlocking!)
1331 {
1332 Label L;
1333 __ ld(t0, Address(xthread, Thread::pending_exception_offset()));
1334 __ beqz(t0, L);
1335 // Note: At some point we may want to unify this with the code
1336 // used in call_VM_base(); i.e., we should use the
1337 // StubRoutines::forward_exception code. For now this doesn't work
1338 // here because the sp is not correctly set at this point.
1339 __ MacroAssembler::call_VM(noreg,
1340 CAST_FROM_FN_PTR(address,
1341 InterpreterRuntime::throw_pending_exception));
1342 __ should_not_reach_here();
1343 __ bind(L);
1344 }
1345
1346 // do unlocking if necessary
1347 {
1348 Label L;
1349 __ lwu(t, Address(xmethod, Method::access_flags_offset()));
1350 __ test_bit(t0, t, exact_log2(JVM_ACC_SYNCHRONIZED));
1351 __ beqz(t0, L);
1352 // the code below should be shared with interpreter macro
1353 // assembler implementation
1354 {
1355 Label unlock;
1356 // BasicObjectLock will be first in list, since this is a
1357 // synchronized method. However, need to check that the object
1358 // has not been unlocked by an explicit monitorexit bytecode.
1359
1360 // monitor expect in c_rarg1 for slow unlock path
1361 __ la(c_rarg1, Address(fp, // address of first monitor
1362 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1363 wordSize - sizeof(BasicObjectLock))));
1364
1365 __ ld(t, Address(c_rarg1, BasicObjectLock::obj_offset()));
1366 __ bnez(t, unlock);
1367
1368 // Entry already unlocked, need to throw exception
1369 __ MacroAssembler::call_VM(noreg,
1370 CAST_FROM_FN_PTR(address,
1371 InterpreterRuntime::throw_illegal_monitor_state_exception));
1372 __ should_not_reach_here();
1373
1374 __ bind(unlock);
1375 __ unlock_object(c_rarg1);
1376 }
1377 __ bind(L);
1378 }
1379
1380 // jvmti support
1381 // Note: This must happen _after_ handling/throwing any exceptions since
1382 // the exception handler code notifies the runtime of method exits
1383 // too. If this happens before, method entry/exit notifications are
1384 // not properly paired (was bug - gri 11/22/99).
1385 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1386
1387 __ pop(ltos);
1388 __ pop(dtos);
1389
1390 __ jalr(result_handler);
1391
1392 // remove activation
1393 __ ld(esp, Address(fp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
1394 // remove frame anchor
1395 __ leave();
1396
1397 // restore sender sp
1398 __ mv(sp, esp);
1399
1400 __ ret();
1401
1402 if (inc_counter) {
1403 // Handle overflow of counter and compile method
1404 __ bind(invocation_counter_overflow);
1405 generate_counter_overflow(continue_after_compile);
1406 }
1407
1408 return entry_point;
1409 }
1410
1411 //
1412 // Generic interpreted method entry to (asm) interpreter
1413 //
1414 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized, bool runtime_upcalls) {
1415
1416 // determine code generation flags
1417 const bool inc_counter = UseCompiler || CountCompiledCalls;
1418
1419 // t0: sender sp
1420 address entry_point = __ pc();
1421
1422 const Address constMethod(xmethod, Method::const_offset());
1423 const Address access_flags(xmethod, Method::access_flags_offset());
1424 const Address size_of_parameters(x13,
1425 ConstMethod::size_of_parameters_offset());
1426 const Address size_of_locals(x13, ConstMethod::size_of_locals_offset());
1427
1428 // get parameter size (always needed)
1429 // need to load the const method first
1430 __ ld(x13, constMethod);
1431 __ load_unsigned_short(x12, size_of_parameters);
1432
1433 // x12: size of parameters
1434
1435 __ load_unsigned_short(x13, size_of_locals); // get size of locals in words
1436 __ sub(x13, x13, x12); // x13 = no. of additional locals
1437
1438 // see if we've got enough room on the stack for locals plus overhead.
1439 generate_stack_overflow_check();
1440
1441 // compute beginning of parameters (xlocals)
1442 __ shadd(xlocals, x12, esp, t1, 3);
1443 __ add(xlocals, xlocals, -wordSize);
1444
1445 // Make room for additional locals
1446 __ slli(t1, x13, 3);
1447 __ sub(t0, esp, t1);
1448
1449 // Padding between locals and fixed part of activation frame to ensure
1450 // SP is always 16-byte aligned.
1451 __ andi(sp, t0, -16);
1452
1453 // x13 - # of additional locals
1454 // allocate space for locals
1455 // explicitly initialize locals
1456 {
1457 Label exit, loop;
1458 __ blez(x13, exit); // do nothing if x13 <= 0
1459 __ bind(loop);
1460 __ sd(zr, Address(t0));
1461 __ add(t0, t0, wordSize);
1462 __ add(x13, x13, -1); // until everything initialized
1463 __ bnez(x13, loop);
1464 __ bind(exit);
1465 }
1466
1467 // And the base dispatch table
1468 __ get_dispatch();
1469
1470 // initialize fixed part of activation frame
1471 generate_fixed_frame(false);
1472
1473 // make sure method is not native & not abstract
1474 #ifdef ASSERT
1475 __ lwu(x10, access_flags);
1476 __ verify_access_flags(x10, JVM_ACC_NATIVE, "tried to execute native method as non-native");
1477 __ verify_access_flags(x10, JVM_ACC_ABSTRACT, "tried to execute abstract method in interpreter");
1478 #endif
1479
1480 // Since at this point in the method invocation the exception
1481 // handler would try to exit the monitor of synchronized methods
1482 // which hasn't been entered yet, we set the thread local variable
1483 // _do_not_unlock_if_synchronized to true. The remove_activation
1484 // will check this flag.
1485
1486 const Address do_not_unlock_if_synchronized(xthread,
1487 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1488 __ mv(t1, true);
1489 __ sb(t1, do_not_unlock_if_synchronized);
1490
1491 Label no_mdp;
1492 const Register mdp = x13;
1493 __ ld(mdp, Address(xmethod, Method::method_data_offset()));
1494 __ beqz(mdp, no_mdp);
1495 __ add(mdp, mdp, in_bytes(MethodData::data_offset()));
1496 __ profile_parameters_type(mdp, x11, x12, x14); // use x11, x12, x14 as tmp registers
1497 __ bind(no_mdp);
1498
1499 // increment invocation count & check for overflow
1500 Label invocation_counter_overflow;
1501 if (inc_counter) {
1502 generate_counter_incr(&invocation_counter_overflow);
1503 }
1504
1505 Label continue_after_compile;
1506 __ bind(continue_after_compile);
1507
1508 bang_stack_shadow_pages(false);
1509
1510 // reset the _do_not_unlock_if_synchronized flag
1511 __ sb(zr, do_not_unlock_if_synchronized);
1512
1513 // check for synchronized methods
1514 // Must happen AFTER invocation_counter check and stack overflow check,
1515 // so method is not locked if overflows.
1516 if (synchronized) {
1517 // Allocate monitor and lock method
1518 lock_method();
1519 } else {
1520 // no synchronization necessary
1521 #ifdef ASSERT
1522 __ lwu(x10, access_flags);
1523 __ verify_access_flags(x10, JVM_ACC_SYNCHRONIZED, "method needs synchronization");
1524 #endif
1525 }
1526
1527 // start execution
1528 #ifdef ASSERT
1529 __ verify_frame_setup();
1530 #endif
1531
1532 // jvmti support
1533 __ notify_method_entry();
1534
1535 __ dispatch_next(vtos);
1536
1537 // invocation counter overflow
1538 if (inc_counter) {
1539 // Handle overflow of counter and compile method
1540 __ bind(invocation_counter_overflow);
1541 generate_counter_overflow(continue_after_compile);
1542 }
1543
1544 return entry_point;
1545 }
1546
1547 // Method entry for java.lang.Thread.currentThread
1548 address TemplateInterpreterGenerator::generate_currentThread() {
1549 address entry_point = __ pc();
1550
1551 __ ld(x10, Address(xthread, JavaThread::vthread_offset()));
1552 __ resolve_oop_handle(x10, t0, t1);
1553 __ ret();
1554
1555 return entry_point;
1556 }
1557
1558 //-----------------------------------------------------------------------------
1559 // Exceptions
1560
1561 void TemplateInterpreterGenerator::generate_throw_exception() {
1562 // Entry point in previous activation (i.e., if the caller was
1563 // interpreted)
1564 Interpreter::_rethrow_exception_entry = __ pc();
1565 // Restore sp to interpreter_frame_last_sp even though we are going
1566 // to empty the expression stack for the exception processing.
1567 __ sd(zr, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
1568 // x10: exception
1569 // x13: return address/pc that threw exception
1570 __ restore_bcp(); // xbcp points to call/send
1571 __ restore_locals();
1572 __ restore_constant_pool_cache();
1573 __ reinit_heapbase(); // restore xheapbase as heapbase.
1574 __ get_dispatch();
1575
1576 // Entry point for exceptions thrown within interpreter code
1577 Interpreter::_throw_exception_entry = __ pc();
1578 // If we came here via a NullPointerException on the receiver of a
1579 // method, xthread may be corrupt.
1580 __ get_method(xmethod);
1581 // expression stack is undefined here
1582 // x10: exception
1583 // xbcp: exception bcp
1584 __ verify_oop(x10);
1585 __ mv(c_rarg1, x10);
1586
1587 // expression stack must be empty before entering the VM in case of
1588 // an exception
1589 __ empty_expression_stack();
1590 // find exception handler address and preserve exception oop
1591 __ call_VM(x13,
1592 CAST_FROM_FN_PTR(address,
1593 InterpreterRuntime::exception_handler_for_exception),
1594 c_rarg1);
1595
1596 // Restore machine SP
1597 __ restore_sp_after_call();
1598
1599 // x10: exception handler entry point
1600 // x13: preserved exception oop
1601 // xbcp: bcp for exception handler
1602 __ push_ptr(x13); // push exception which is now the only value on the stack
1603 __ jr(x10); // jump to exception handler (may be _remove_activation_entry!)
1604
1605 // If the exception is not handled in the current frame the frame is
1606 // removed and the exception is rethrown (i.e. exception
1607 // continuation is _rethrow_exception).
1608 //
1609 // Note: At this point the bci is still the bxi for the instruction
1610 // which caused the exception and the expression stack is
1611 // empty. Thus, for any VM calls at this point, GC will find a legal
1612 // oop map (with empty expression stack).
1613
1614 //
1615 // JVMTI PopFrame support
1616 //
1617
1618 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1619 __ empty_expression_stack();
1620 // Set the popframe_processing bit in pending_popframe_condition
1621 // indicating that we are currently handling popframe, so that
1622 // call_VMs that may happen later do not trigger new popframe
1623 // handling cycles.
1624 __ lwu(x13, Address(xthread, JavaThread::popframe_condition_offset()));
1625 __ ori(x13, x13, JavaThread::popframe_processing_bit);
1626 __ sw(x13, Address(xthread, JavaThread::popframe_condition_offset()));
1627
1628 {
1629 // Check to see whether we are returning to a deoptimized frame.
1630 // (The PopFrame call ensures that the caller of the popped frame is
1631 // either interpreted or compiled and deoptimizes it if compiled.)
1632 // In this case, we can't call dispatch_next() after the frame is
1633 // popped, but instead must save the incoming arguments and restore
1634 // them after deoptimization has occurred.
1635 //
1636 // Note that we don't compare the return PC against the
1637 // deoptimization blob's unpack entry because of the presence of
1638 // adapter frames in C2.
1639 Label caller_not_deoptimized;
1640 __ ld(c_rarg1, Address(fp, frame::return_addr_offset * wordSize));
1641 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), c_rarg1);
1642 __ bnez(x10, caller_not_deoptimized);
1643
1644 // Compute size of arguments for saving when returning to
1645 // deoptimized caller
1646 __ get_method(x10);
1647 __ ld(x10, Address(x10, Method::const_offset()));
1648 __ load_unsigned_short(x10, Address(x10, in_bytes(ConstMethod::
1649 size_of_parameters_offset())));
1650 __ slli(x10, x10, Interpreter::logStackElementSize);
1651 __ restore_locals();
1652 __ sub(xlocals, xlocals, x10);
1653 __ add(xlocals, xlocals, wordSize);
1654 // Save these arguments
1655 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1656 Deoptimization::
1657 popframe_preserve_args),
1658 xthread, x10, xlocals);
1659
1660 __ remove_activation(vtos,
1661 /* throw_monitor_exception */ false,
1662 /* install_monitor_exception */ false,
1663 /* notify_jvmdi */ false);
1664
1665 // Inform deoptimization that it is responsible for restoring
1666 // these arguments
1667 __ mv(t0, JavaThread::popframe_force_deopt_reexecution_bit);
1668 __ sw(t0, Address(xthread, JavaThread::popframe_condition_offset()));
1669
1670 // Continue in deoptimization handler
1671 __ ret();
1672
1673 __ bind(caller_not_deoptimized);
1674 }
1675
1676 __ remove_activation(vtos,
1677 /* throw_monitor_exception */ false,
1678 /* install_monitor_exception */ false,
1679 /* notify_jvmdi */ false);
1680
1681 // Restore the last_sp and null it out
1682 __ ld(t0, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
1683 __ shadd(esp, t0, fp, t0, LogBytesPerWord);
1684 __ sd(zr, Address(fp, frame::interpreter_frame_last_sp_offset * wordSize));
1685
1686 __ restore_bcp();
1687 __ restore_locals();
1688 __ restore_constant_pool_cache();
1689 __ get_method(xmethod);
1690 __ get_dispatch();
1691
1692 // The method data pointer was incremented already during
1693 // call profiling. We have to restore the mdp for the current bcp.
1694 if (ProfileInterpreter) {
1695 __ set_method_data_pointer_for_bcp();
1696 }
1697
1698 // Clear the popframe condition flag
1699 __ sw(zr, Address(xthread, JavaThread::popframe_condition_offset()));
1700 assert(JavaThread::popframe_inactive == 0, "fix popframe_inactive");
1701
1702 #if INCLUDE_JVMTI
1703 {
1704 Label L_done;
1705
1706 __ lbu(t0, Address(xbcp, 0));
1707 __ mv(t1, Bytecodes::_invokestatic);
1708 __ bne(t1, t0, L_done);
1709
1710 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1711 // Detect such a case in the InterpreterRuntime function and return the member name argument,or null.
1712
1713 __ ld(c_rarg0, Address(xlocals, 0));
1714 __ call_VM(x10, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null),c_rarg0, xmethod, xbcp);
1715
1716 __ beqz(x10, L_done);
1717
1718 __ sd(x10, Address(esp, 0));
1719 __ bind(L_done);
1720 }
1721 #endif // INCLUDE_JVMTI
1722
1723 // Restore machine SP
1724 __ restore_sp_after_call();
1725
1726 __ dispatch_next(vtos);
1727 // end of PopFrame support
1728
1729 Interpreter::_remove_activation_entry = __ pc();
1730
1731 // preserve exception over this code sequence
1732 __ pop_ptr(x10);
1733 __ sd(x10, Address(xthread, JavaThread::vm_result_offset()));
1734 // remove the activation (without doing throws on illegalMonitorExceptions)
1735 __ remove_activation(vtos, false, true, false);
1736 // restore exception
1737 __ get_vm_result(x10, xthread);
1738
1739 // In between activations - previous activation type unknown yet
1740 // compute continuation point - the continuation point expects the
1741 // following registers set up:
1742 //
1743 // x10: exception
1744 // ra: return address/pc that threw exception
1745 // sp: expression stack of caller
1746 // fp: fp of caller
1747 // FIXME: There's no point saving ra here because VM calls don't trash it
1748 __ sub(sp, sp, 2 * wordSize);
1749 __ sd(x10, Address(sp, 0)); // save exception
1750 __ sd(ra, Address(sp, wordSize)); // save return address
1751 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1752 SharedRuntime::exception_handler_for_return_address),
1753 xthread, ra);
1754 __ mv(x11, x10); // save exception handler
1755 __ ld(x10, Address(sp, 0)); // restore exception
1756 __ ld(ra, Address(sp, wordSize)); // restore return address
1757 __ add(sp, sp, 2 * wordSize);
1758 // We might be returning to a deopt handler that expects x13 to
1759 // contain the exception pc
1760 __ mv(x13, ra);
1761 // Note that an "issuing PC" is actually the next PC after the call
1762 __ jr(x11); // jump to exception
1763 // handler of caller
1764 }
1765
1766 //
1767 // JVMTI ForceEarlyReturn support
1768 //
1769 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1770 address entry = __ pc();
1771
1772 __ restore_bcp();
1773 __ restore_locals();
1774 __ empty_expression_stack();
1775 __ load_earlyret_value(state);
1776
1777 __ ld(t0, Address(xthread, JavaThread::jvmti_thread_state_offset()));
1778 Address cond_addr(t0, JvmtiThreadState::earlyret_state_offset());
1779
1780 // Clear the earlyret state
1781 assert(JvmtiThreadState::earlyret_inactive == 0, "should be");
1782 __ sd(zr, cond_addr);
1783
1784 __ remove_activation(state,
1785 false, /* throw_monitor_exception */
1786 false, /* install_monitor_exception */
1787 true); /* notify_jvmdi */
1788 __ ret();
1789
1790 return entry;
1791 }
1792 // end of ForceEarlyReturn support
1793
1794 //-----------------------------------------------------------------------------
1795 // Helper for vtos entry point generation
1796
1797 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1798 address& bep,
1799 address& cep,
1800 address& sep,
1801 address& aep,
1802 address& iep,
1803 address& lep,
1804 address& fep,
1805 address& dep,
1806 address& vep) {
1807 assert(t != nullptr && t->is_valid() && t->tos_in() == vtos, "illegal template");
1808 Label L;
1809 aep = __ pc(); // atos entry point
1810 __ push_ptr();
1811 __ j(L);
1812 fep = __ pc(); // ftos entry point
1813 __ push_f();
1814 __ j(L);
1815 dep = __ pc(); // dtos entry point
1816 __ push_d();
1817 __ j(L);
1818 lep = __ pc(); // ltos entry point
1819 __ push_l();
1820 __ j(L);
1821 bep = cep = sep = iep = __ pc(); // [bcsi]tos entry point
1822 __ push_i();
1823 vep = __ pc(); // vtos entry point
1824 __ bind(L);
1825 generate_and_dispatch(t);
1826 }
1827
1828 //-----------------------------------------------------------------------------
1829
1830 void TemplateInterpreterGenerator::count_bytecode() {
1831 __ mv(x7, (address) &BytecodeCounter::_counter_value);
1832 __ atomic_addw(noreg, 1, x7);
1833 }
1834
1835 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1836 __ mv(x7, (address) &BytecodeHistogram::_counters[t->bytecode()]);
1837 __ atomic_addw(noreg, 1, x7);
1838 }
1839
1840 // Non-product code
1841 #ifndef PRODUCT
1842 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1843 address entry = __ pc();
1844
1845 __ push_reg(ra);
1846 __ push(state);
1847 __ push_reg(RegSet::range(x10, x17) + RegSet::range(x5, x7) + RegSet::range(x28, x31), sp);
1848 __ mv(c_rarg2, x10); // Pass itos
1849 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), c_rarg1, c_rarg2, c_rarg3);
1850 __ pop_reg(RegSet::range(x10, x17) + RegSet::range(x5, x7) + RegSet::range(x28, x31), sp);
1851 __ pop(state);
1852 __ pop_reg(ra);
1853 __ ret(); // return from result handler
1854
1855 return entry;
1856 }
1857
1858 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1859 // Calculate new index for counter:
1860 // _index = (_index >> log2_number_of_codes) |
1861 // (bytecode << log2_number_of_codes);
1862 Register index_addr = t1;
1863 Register index = t0;
1864 __ mv(index_addr, (address) &BytecodePairHistogram::_index);
1865 __ lw(index, index_addr);
1866 __ mv(x7, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
1867 __ srli(index, index, BytecodePairHistogram::log2_number_of_codes);
1868 __ orrw(index, x7, index);
1869 __ sw(index, index_addr);
1870 // Bump bucket contents:
1871 // _counters[_index] ++;
1872 Register counter_addr = t1;
1873 __ mv(x7, (address) &BytecodePairHistogram::_counters);
1874 __ shadd(counter_addr, index, x7, counter_addr, LogBytesPerInt);
1875 __ atomic_addw(noreg, 1, counter_addr);
1876 }
1877
1878 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1879 // Call a little run-time stub to avoid blow-up for each bytecode.
1880 // The run-time runtime saves the right registers, depending on
1881 // the tosca in-state for the given template.
1882
1883 assert(Interpreter::trace_code(t->tos_in()) != nullptr, "entry must have been generated");
1884 __ rt_call(Interpreter::trace_code(t->tos_in()));
1885 __ reinit_heapbase();
1886 }
1887
1888 void TemplateInterpreterGenerator::stop_interpreter_at() {
1889 Label L;
1890 __ push_reg(t0);
1891 __ mv(t0, (address) &BytecodeCounter::_counter_value);
1892 __ ld(t0, Address(t0));
1893 __ mv(t1, StopInterpreterAt);
1894 __ bne(t0, t1, L);
1895 __ ebreak();
1896 __ bind(L);
1897 __ pop_reg(t0);
1898 }
1899
1900 #endif // !PRODUCT