1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, 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.hpp"
28 #include "gc/shared/barrierSetAssembler.hpp"
29 #include "interpreter/bytecodeHistogram.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/interp_masm.hpp"
33 #include "interpreter/templateInterpreterGenerator.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "interpreter/bytecodeTracer.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "oops/arrayOop.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/method.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "prims/jvmtiThreadState.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/deoptimization.hpp"
45 #include "runtime/frame.inline.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "runtime/stubRoutines.hpp"
48 #include "runtime/synchronizer.hpp"
49 #include "runtime/timer.hpp"
50 #include "runtime/vframeArray.hpp"
51 #include "utilities/debug.hpp"
52 #include <sys/types.h>
53
54 #ifndef PRODUCT
55 #include "oops/method.hpp"
56 #endif // !PRODUCT
57
58 #ifdef BUILTIN_SIM
59 #include "../../../../../../simulator/simulator.hpp"
60 #endif
61
62 // Size of interpreter code. Increase if too small. Interpreter will
63 // fail with a guarantee ("not enough space for interpreter generation");
64 // if too small.
65 // Run with +PrintInterpreter to get the VM to print out the size.
66 // Max size with JVMTI
67 int TemplateInterpreter::InterpreterCodeSize = 200 * 1024;
68
69 #define __ _masm->
70
71 //-----------------------------------------------------------------------------
72
73 extern "C" void entry(CodeBuffer*);
74
75 //-----------------------------------------------------------------------------
76
77 address TemplateInterpreterGenerator::generate_slow_signature_handler() {
78 address entry = __ pc();
79
80 __ andr(esp, esp, -16);
81 __ mov(c_rarg3, esp);
82 // rmethod
83 // rlocals
84 // c_rarg3: first stack arg - wordSize
85
86 // adjust sp
87 __ sub(sp, c_rarg3, 18 * wordSize);
88 __ str(lr, Address(__ pre(sp, -2 * wordSize)));
89 __ call_VM(noreg,
90 CAST_FROM_FN_PTR(address,
91 InterpreterRuntime::slow_signature_handler),
92 rmethod, rlocals, c_rarg3);
93
94 // r0: result handler
95
96 // Stack layout:
97 // rsp: return address <- sp
98 // 1 garbage
99 // 8 integer args (if static first is unused)
100 // 1 float/double identifiers
101 // 8 double args
102 // stack args <- esp
103 // garbage
104 // expression stack bottom
105 // bcp (NULL)
106 // ...
107
108 // Restore LR
109 __ ldr(lr, Address(__ post(sp, 2 * wordSize)));
110
111 // Do FP first so we can use c_rarg3 as temp
112 __ ldrw(c_rarg3, Address(sp, 9 * wordSize)); // float/double identifiers
113
114 for (int i = 0; i < Argument::n_float_register_parameters_c; i++) {
115 const FloatRegister r = as_FloatRegister(i);
116
117 Label d, done;
118
119 __ tbnz(c_rarg3, i, d);
120 __ ldrs(r, Address(sp, (10 + i) * wordSize));
121 __ b(done);
122 __ bind(d);
123 __ ldrd(r, Address(sp, (10 + i) * wordSize));
124 __ bind(done);
125 }
126
127 // c_rarg0 contains the result from the call of
128 // InterpreterRuntime::slow_signature_handler so we don't touch it
129 // here. It will be loaded with the JNIEnv* later.
130 __ ldr(c_rarg1, Address(sp, 1 * wordSize));
131 for (int i = c_rarg2->encoding(); i <= c_rarg7->encoding(); i += 2) {
132 Register rm = as_Register(i), rn = as_Register(i+1);
133 __ ldp(rm, rn, Address(sp, i * wordSize));
134 }
135
136 __ add(sp, sp, 18 * wordSize);
137 __ ret(lr);
138
139 return entry;
140 }
141
142
143 //
144 // Various method entries
145 //
146
147 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
148 // rmethod: Method*
149 // r13: sender sp
150 // esp: args
151
152 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
153
154 // These don't need a safepoint check because they aren't virtually
155 // callable. We won't enter these intrinsics from compiled code.
156 // If in the future we added an intrinsic which was virtually callable
157 // we'd have to worry about how to safepoint so that this code is used.
158
159 // mathematical functions inlined by compiler
160 // (interpreter must provide identical implementation
161 // in order to avoid monotonicity bugs when switching
162 // from interpreter to compiler in the middle of some
163 // computation)
164 //
165 // stack:
166 // [ arg ] <-- esp
167 // [ arg ]
168 // retaddr in lr
169
170 address entry_point = NULL;
171 Register continuation = lr;
172 switch (kind) {
173 case Interpreter::java_lang_math_abs:
174 entry_point = __ pc();
175 __ ldrd(v0, Address(esp));
176 __ fabsd(v0, v0);
177 __ mov(sp, r13); // Restore caller's SP
178 break;
179 case Interpreter::java_lang_math_sqrt:
180 entry_point = __ pc();
181 __ ldrd(v0, Address(esp));
182 __ fsqrtd(v0, v0);
183 __ mov(sp, r13);
184 break;
185 case Interpreter::java_lang_math_sin :
186 case Interpreter::java_lang_math_cos :
187 case Interpreter::java_lang_math_tan :
188 case Interpreter::java_lang_math_log :
189 case Interpreter::java_lang_math_log10 :
190 case Interpreter::java_lang_math_exp :
191 entry_point = __ pc();
192 __ ldrd(v0, Address(esp));
193 __ mov(sp, r13);
194 __ mov(r19, lr);
195 continuation = r19; // The first callee-saved register
196 generate_transcendental_entry(kind, 1);
197 break;
198 case Interpreter::java_lang_math_pow :
199 entry_point = __ pc();
200 __ mov(r19, lr);
201 continuation = r19;
202 __ ldrd(v0, Address(esp, 2 * Interpreter::stackElementSize));
203 __ ldrd(v1, Address(esp));
204 __ mov(sp, r13);
205 generate_transcendental_entry(kind, 2);
206 break;
207 case Interpreter::java_lang_math_fmaD :
208 if (UseFMA) {
209 entry_point = __ pc();
210 __ ldrd(v0, Address(esp, 4 * Interpreter::stackElementSize));
211 __ ldrd(v1, Address(esp, 2 * Interpreter::stackElementSize));
212 __ ldrd(v2, Address(esp));
213 __ fmaddd(v0, v0, v1, v2);
214 __ mov(sp, r13); // Restore caller's SP
215 }
216 break;
217 case Interpreter::java_lang_math_fmaF :
218 if (UseFMA) {
219 entry_point = __ pc();
220 __ ldrs(v0, Address(esp, 2 * Interpreter::stackElementSize));
221 __ ldrs(v1, Address(esp, Interpreter::stackElementSize));
222 __ ldrs(v2, Address(esp));
223 __ fmadds(v0, v0, v1, v2);
224 __ mov(sp, r13); // Restore caller's SP
225 }
226 break;
227 default:
228 ;
229 }
230 if (entry_point) {
231 __ br(continuation);
232 }
233
234 return entry_point;
235 }
236
237 // double trigonometrics and transcendentals
238 // static jdouble dsin(jdouble x);
239 // static jdouble dcos(jdouble x);
240 // static jdouble dtan(jdouble x);
241 // static jdouble dlog(jdouble x);
242 // static jdouble dlog10(jdouble x);
243 // static jdouble dexp(jdouble x);
244 // static jdouble dpow(jdouble x, jdouble y);
245
246 void TemplateInterpreterGenerator::generate_transcendental_entry(AbstractInterpreter::MethodKind kind, int fpargs) {
247 address fn;
248 switch (kind) {
249 case Interpreter::java_lang_math_sin :
250 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
251 break;
252 case Interpreter::java_lang_math_cos :
253 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
254 break;
255 case Interpreter::java_lang_math_tan :
256 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
257 break;
258 case Interpreter::java_lang_math_log :
259 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
260 break;
261 case Interpreter::java_lang_math_log10 :
262 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
263 break;
264 case Interpreter::java_lang_math_exp :
265 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dexp);
266 break;
267 case Interpreter::java_lang_math_pow :
268 fpargs = 2;
269 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dpow);
270 break;
271 default:
272 ShouldNotReachHere();
273 fn = NULL; // unreachable
274 }
275 const int gpargs = 0, rtype = 3;
276 __ mov(rscratch1, fn);
277 __ blrt(rscratch1, gpargs, fpargs, rtype);
278 }
279
280 // Abstract method entry
281 // Attempt to execute abstract method. Throw exception
282 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
283 // rmethod: Method*
284 // r13: sender SP
285
286 address entry_point = __ pc();
287
288 // abstract method entry
289
290 // pop return address, reset last_sp to NULL
291 __ empty_expression_stack();
292 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
293 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
294
295 // throw exception
296 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
297 InterpreterRuntime::throw_AbstractMethodErrorWithMethod),
298 rmethod);
299 // the call_VM checks for exception, so we should never return here.
300 __ should_not_reach_here();
301
302 return entry_point;
303 }
304
305 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
306 address entry = __ pc();
307
308 #ifdef ASSERT
309 {
310 Label L;
311 __ ldr(rscratch1, Address(rfp,
312 frame::interpreter_frame_monitor_block_top_offset *
313 wordSize));
314 __ mov(rscratch2, sp);
315 __ cmp(rscratch1, rscratch2); // maximal rsp for current rfp (stack
316 // grows negative)
317 __ br(Assembler::HS, L); // check if frame is complete
318 __ stop ("interpreter frame not set up");
319 __ bind(L);
320 }
321 #endif // ASSERT
322 // Restore bcp under the assumption that the current frame is still
323 // interpreted
324 __ restore_bcp();
325
326 // expression stack must be empty before entering the VM if an
327 // exception happened
328 __ empty_expression_stack();
329 // throw exception
330 __ call_VM(noreg,
331 CAST_FROM_FN_PTR(address,
332 InterpreterRuntime::throw_StackOverflowError));
333 return entry;
334 }
335
336 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
337 const char* name) {
338 address entry = __ pc();
339 // expression stack must be empty before entering the VM if an
340 // exception happened
341 __ empty_expression_stack();
342 // setup parameters
343 // ??? convention: expect aberrant index in register r1
344 __ movw(c_rarg2, r1);
345 __ mov(c_rarg1, (address)name);
346 __ call_VM(noreg,
347 CAST_FROM_FN_PTR(address,
348 InterpreterRuntime::
349 throw_ArrayIndexOutOfBoundsException),
350 c_rarg1, c_rarg2);
351 return entry;
352 }
353
354 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
355 address entry = __ pc();
356
357 // object is at TOS
358 __ pop(c_rarg1);
359
360 // expression stack must be empty before entering the VM if an
361 // exception happened
362 __ empty_expression_stack();
363
364 __ call_VM(noreg,
365 CAST_FROM_FN_PTR(address,
366 InterpreterRuntime::
367 throw_ClassCastException),
368 c_rarg1);
369 return entry;
370 }
371
372 address TemplateInterpreterGenerator::generate_exception_handler_common(
373 const char* name, const char* message, bool pass_oop) {
374 assert(!pass_oop || message == NULL, "either oop or message but not both");
375 address entry = __ pc();
376 if (pass_oop) {
377 // object is at TOS
378 __ pop(c_rarg2);
379 }
380 // expression stack must be empty before entering the VM if an
381 // exception happened
382 __ empty_expression_stack();
383 // setup parameters
384 __ lea(c_rarg1, Address((address)name));
385 if (pass_oop) {
386 __ call_VM(r0, CAST_FROM_FN_PTR(address,
387 InterpreterRuntime::
388 create_klass_exception),
389 c_rarg1, c_rarg2);
390 } else {
391 // kind of lame ExternalAddress can't take NULL because
392 // external_word_Relocation will assert.
393 if (message != NULL) {
394 __ lea(c_rarg2, Address((address)message));
395 } else {
396 __ mov(c_rarg2, NULL_WORD);
397 }
398 __ call_VM(r0,
399 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
400 c_rarg1, c_rarg2);
401 }
402 // throw exception
403 __ b(address(Interpreter::throw_exception_entry()));
404 return entry;
405 }
406
407 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
408 address entry = __ pc();
409
410 // Restore stack bottom in case i2c adjusted stack
411 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
412 // and NULL it as marker that esp is now tos until next java call
413 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
414 __ restore_bcp();
415 __ restore_locals();
416 __ restore_constant_pool_cache();
417 __ get_method(rmethod);
418
419 if (state == atos) {
420 Register obj = r0;
421 Register mdp = r1;
422 Register tmp = r2;
423 __ ldr(mdp, Address(rmethod, Method::method_data_offset()));
424 __ profile_return_type(mdp, obj, tmp);
425 }
426
427 // Pop N words from the stack
428 __ get_cache_and_index_at_bcp(r1, r2, 1, index_size);
429 __ ldr(r1, Address(r1, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
430 __ andr(r1, r1, ConstantPoolCacheEntry::parameter_size_mask);
431
432 __ add(esp, esp, r1, Assembler::LSL, 3);
433
434 // Restore machine SP
435 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
436 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
437 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
438 __ ldr(rscratch2,
439 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
440 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
441 __ andr(sp, rscratch1, -16);
442
443 #ifndef PRODUCT
444 // tell the simulator that the method has been reentered
445 if (NotifySimulator) {
446 __ notify(Assembler::method_reentry);
447 }
448 #endif
449
450 __ check_and_handle_popframe(rthread);
451 __ check_and_handle_earlyret(rthread);
452
453 __ get_dispatch();
454 __ dispatch_next(state, step);
455
456 return entry;
457 }
458
459 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
460 int step,
461 address continuation) {
462 address entry = __ pc();
463 __ restore_bcp();
464 __ restore_locals();
465 __ restore_constant_pool_cache();
466 __ get_method(rmethod);
467 __ get_dispatch();
468
469 // Calculate stack limit
470 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
471 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
472 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
473 __ ldr(rscratch2,
474 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
475 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
476 __ andr(sp, rscratch1, -16);
477
478 // Restore expression stack pointer
479 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
480 // NULL last_sp until next java call
481 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
482
483 #if INCLUDE_JVMCI
484 // Check if we need to take lock at entry of synchronized method. This can
485 // only occur on method entry so emit it only for vtos with step 0.
486 if (EnableJVMCI && state == vtos && step == 0) {
487 Label L;
488 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
489 __ cbz(rscratch1, L);
490 // Clear flag.
491 __ strb(zr, Address(rthread, JavaThread::pending_monitorenter_offset()));
492 // Take lock.
493 lock_method();
494 __ bind(L);
495 } else {
496 #ifdef ASSERT
497 if (EnableJVMCI) {
498 Label L;
499 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
500 __ cbz(rscratch1, L);
501 __ stop("unexpected pending monitor in deopt entry");
502 __ bind(L);
503 }
504 #endif
505 }
506 #endif
507 // handle exceptions
508 {
509 Label L;
510 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
511 __ cbz(rscratch1, L);
512 __ call_VM(noreg,
513 CAST_FROM_FN_PTR(address,
514 InterpreterRuntime::throw_pending_exception));
515 __ should_not_reach_here();
516 __ bind(L);
517 }
518
519 if (continuation == NULL) {
520 __ dispatch_next(state, step);
521 } else {
522 __ jump_to_entry(continuation);
523 }
524 return entry;
525 }
526
527 address TemplateInterpreterGenerator::generate_result_handler_for(
528 BasicType type) {
529 address entry = __ pc();
530 switch (type) {
531 case T_BOOLEAN: __ uxtb(r0, r0); break;
532 case T_CHAR : __ uxth(r0, r0); break;
533 case T_BYTE : __ sxtb(r0, r0); break;
534 case T_SHORT : __ sxth(r0, r0); break;
535 case T_INT : __ uxtw(r0, r0); break; // FIXME: We almost certainly don't need this
536 case T_LONG : /* nothing to do */ break;
537 case T_VOID : /* nothing to do */ break;
538 case T_FLOAT : /* nothing to do */ break;
539 case T_DOUBLE : /* nothing to do */ break;
540 case T_OBJECT :
541 // retrieve result from frame
542 __ ldr(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
543 // and verify it
544 __ verify_oop(r0);
545 break;
546 default : ShouldNotReachHere();
547 }
548 __ ret(lr); // return from result handler
549 return entry;
550 }
551
552 address TemplateInterpreterGenerator::generate_safept_entry_for(
553 TosState state,
554 address runtime_entry) {
555 address entry = __ pc();
556 __ push(state);
557 __ call_VM(noreg, runtime_entry);
558 __ membar(Assembler::AnyAny);
559 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
560 return entry;
561 }
562
563 // Helpers for commoning out cases in the various type of method entries.
564 //
565
566
567 // increment invocation count & check for overflow
568 //
569 // Note: checking for negative value instead of overflow
570 // so we have a 'sticky' overflow test
571 //
572 // rmethod: method
573 //
574 void TemplateInterpreterGenerator::generate_counter_incr(
575 Label* overflow,
576 Label* profile_method,
577 Label* profile_method_continue) {
578 Label done;
579 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
580 if (TieredCompilation) {
581 int increment = InvocationCounter::count_increment;
582 Label no_mdo;
583 if (ProfileInterpreter) {
584 // Are we profiling?
585 __ ldr(r0, Address(rmethod, Method::method_data_offset()));
586 __ cbz(r0, no_mdo);
587 // Increment counter in the MDO
588 const Address mdo_invocation_counter(r0, in_bytes(MethodData::invocation_counter_offset()) +
589 in_bytes(InvocationCounter::counter_offset()));
590 const Address mask(r0, in_bytes(MethodData::invoke_mask_offset()));
591 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rscratch1, rscratch2, false, Assembler::EQ, overflow);
592 __ b(done);
593 }
594 __ bind(no_mdo);
595 // Increment counter in MethodCounters
596 const Address invocation_counter(rscratch2,
597 MethodCounters::invocation_counter_offset() +
598 InvocationCounter::counter_offset());
599 __ get_method_counters(rmethod, rscratch2, done);
600 const Address mask(rscratch2, in_bytes(MethodCounters::invoke_mask_offset()));
601 __ increment_mask_and_jump(invocation_counter, increment, mask, rscratch1, r1, false, Assembler::EQ, overflow);
602 __ bind(done);
603 } else { // not TieredCompilation
604 const Address backedge_counter(rscratch2,
605 MethodCounters::backedge_counter_offset() +
606 InvocationCounter::counter_offset());
607 const Address invocation_counter(rscratch2,
608 MethodCounters::invocation_counter_offset() +
609 InvocationCounter::counter_offset());
610
611 __ get_method_counters(rmethod, rscratch2, done);
612
613 if (ProfileInterpreter) { // %%% Merge this into MethodData*
614 __ ldrw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset()));
615 __ addw(r1, r1, 1);
616 __ strw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset()));
617 }
618 // Update standard invocation counters
619 __ ldrw(r1, invocation_counter);
620 __ ldrw(r0, backedge_counter);
621
622 __ addw(r1, r1, InvocationCounter::count_increment);
623 __ andw(r0, r0, InvocationCounter::count_mask_value);
624
625 __ strw(r1, invocation_counter);
626 __ addw(r0, r0, r1); // add both counters
627
628 // profile_method is non-null only for interpreted method so
629 // profile_method != NULL == !native_call
630
631 if (ProfileInterpreter && profile_method != NULL) {
632 // Test to see if we should create a method data oop
633 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset()));
634 __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
635 __ cmpw(r0, rscratch2);
636 __ br(Assembler::LT, *profile_method_continue);
637
638 // if no method data exists, go to profile_method
639 __ test_method_data_pointer(rscratch2, *profile_method);
640 }
641
642 {
643 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset()));
644 __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
645 __ cmpw(r0, rscratch2);
646 __ br(Assembler::HS, *overflow);
647 }
648 __ bind(done);
649 }
650 }
651
652 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
653
654 // Asm interpreter on entry
655 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
656 // Everything as it was on entry
657
658 // InterpreterRuntime::frequency_counter_overflow takes two
659 // arguments, the first (thread) is passed by call_VM, the second
660 // indicates if the counter overflow occurs at a backwards branch
661 // (NULL bcp). We pass zero for it. The call returns the address
662 // of the verified entry point for the method or NULL if the
663 // compilation did not complete (either went background or bailed
664 // out).
665 __ mov(c_rarg1, 0);
666 __ call_VM(noreg,
667 CAST_FROM_FN_PTR(address,
668 InterpreterRuntime::frequency_counter_overflow),
669 c_rarg1);
670
671 __ b(do_continue);
672 }
673
674 // See if we've got enough room on the stack for locals plus overhead
675 // below JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
676 // without going through the signal handler, i.e., reserved and yellow zones
677 // will not be made usable. The shadow zone must suffice to handle the
678 // overflow.
679 // The expression stack grows down incrementally, so the normal guard
680 // page mechanism will work for that.
681 //
682 // NOTE: Since the additional locals are also always pushed (wasn't
683 // obvious in generate_method_entry) so the guard should work for them
684 // too.
685 //
686 // Args:
687 // r3: number of additional locals this frame needs (what we must check)
688 // rmethod: Method*
689 //
690 // Kills:
691 // r0
692 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
693
694 // monitor entry size: see picture of stack set
695 // (generate_method_entry) and frame_amd64.hpp
696 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
697
698 // total overhead size: entry_size + (saved rbp through expr stack
699 // bottom). be sure to change this if you add/subtract anything
700 // to/from the overhead area
701 const int overhead_size =
702 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
703
704 const int page_size = os::vm_page_size();
705
706 Label after_frame_check;
707
708 // see if the frame is greater than one page in size. If so,
709 // then we need to verify there is enough stack space remaining
710 // for the additional locals.
711 //
712 // Note that we use SUBS rather than CMP here because the immediate
713 // field of this instruction may overflow. SUBS can cope with this
714 // because it is a macro that will expand to some number of MOV
715 // instructions and a register operation.
716 __ subs(rscratch1, r3, (page_size - overhead_size) / Interpreter::stackElementSize);
717 __ br(Assembler::LS, after_frame_check);
718
719 // compute rsp as if this were going to be the last frame on
720 // the stack before the red zone
721
722 // locals + overhead, in bytes
723 __ mov(r0, overhead_size);
724 __ add(r0, r0, r3, Assembler::LSL, Interpreter::logStackElementSize); // 2 slots per parameter.
725
726 const Address stack_limit(rthread, JavaThread::stack_overflow_limit_offset());
727 __ ldr(rscratch1, stack_limit);
728
729 #ifdef ASSERT
730 Label limit_okay;
731 // Verify that thread stack limit is non-zero.
732 __ cbnz(rscratch1, limit_okay);
733 __ stop("stack overflow limit is zero");
734 __ bind(limit_okay);
735 #endif
736
737 // Add stack limit to locals.
738 __ add(r0, r0, rscratch1);
739
740 // Check against the current stack bottom.
741 __ cmp(sp, r0);
742 __ br(Assembler::HI, after_frame_check);
743
744 // Remove the incoming args, peeling the machine SP back to where it
745 // was in the caller. This is not strictly necessary, but unless we
746 // do so the stack frame may have a garbage FP; this ensures a
747 // correct call stack that we can always unwind. The ANDR should be
748 // unnecessary because the sender SP in r13 is always aligned, but
749 // it doesn't hurt.
750 __ andr(sp, r13, -16);
751
752 // Note: the restored frame is not necessarily interpreted.
753 // Use the shared runtime version of the StackOverflowError.
754 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
755 __ far_jump(RuntimeAddress(StubRoutines::throw_StackOverflowError_entry()));
756
757 // all done with frame size check
758 __ bind(after_frame_check);
759 }
760
761 // Allocate monitor and lock method (asm interpreter)
762 //
763 // Args:
764 // rmethod: Method*
765 // rlocals: locals
766 //
767 // Kills:
768 // r0
769 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
770 // rscratch1, rscratch2 (scratch regs)
771 void TemplateInterpreterGenerator::lock_method() {
772 // synchronize method
773 const Address access_flags(rmethod, Method::access_flags_offset());
774 const Address monitor_block_top(
775 rfp,
776 frame::interpreter_frame_monitor_block_top_offset * wordSize);
777 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
778
779 #ifdef ASSERT
780 {
781 Label L;
782 __ ldrw(r0, access_flags);
783 __ tst(r0, JVM_ACC_SYNCHRONIZED);
784 __ br(Assembler::NE, L);
785 __ stop("method doesn't need synchronization");
786 __ bind(L);
787 }
788 #endif // ASSERT
789
790 // get synchronization object
791 {
792 Label done;
793 __ ldrw(r0, access_flags);
794 __ tst(r0, JVM_ACC_STATIC);
795 // get receiver (assume this is frequent case)
796 __ ldr(r0, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
797 __ br(Assembler::EQ, done);
798 __ load_mirror(r0, rmethod);
799
800 #ifdef ASSERT
801 {
802 Label L;
803 __ cbnz(r0, L);
804 __ stop("synchronization object is NULL");
805 __ bind(L);
806 }
807 #endif // ASSERT
808
809 __ bind(done);
810 }
811
812 // add space for monitor & lock
813 __ sub(sp, sp, entry_size); // add space for a monitor entry
814 __ sub(esp, esp, entry_size);
815 __ mov(rscratch1, esp);
816 __ str(rscratch1, monitor_block_top); // set new monitor block top
817 // store object
818 __ str(r0, Address(esp, BasicObjectLock::obj_offset_in_bytes()));
819 __ mov(c_rarg1, esp); // object address
820 __ lock_object(c_rarg1);
821 }
822
823 // Generate a fixed interpreter frame. This is identical setup for
824 // interpreted methods and for native methods hence the shared code.
825 //
826 // Args:
827 // lr: return address
828 // rmethod: Method*
829 // rlocals: pointer to locals
830 // rcpool: cp cache
831 // stack_pointer: previous sp
832 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
833 // initialize fixed part of activation frame
834 if (native_call) {
835 __ sub(esp, sp, 14 * wordSize);
836 __ mov(rbcp, zr);
837 __ stp(esp, zr, Address(__ pre(sp, -14 * wordSize)));
838 // add 2 zero-initialized slots for native calls
839 __ stp(zr, zr, Address(sp, 12 * wordSize));
840 } else {
841 __ sub(esp, sp, 12 * wordSize);
842 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); // get ConstMethod
843 __ add(rbcp, rscratch1, in_bytes(ConstMethod::codes_offset())); // get codebase
844 __ stp(esp, rbcp, Address(__ pre(sp, -12 * wordSize)));
845 }
846
847 if (ProfileInterpreter) {
848 Label method_data_continue;
849 __ ldr(rscratch1, Address(rmethod, Method::method_data_offset()));
850 __ cbz(rscratch1, method_data_continue);
851 __ lea(rscratch1, Address(rscratch1, in_bytes(MethodData::data_offset())));
852 __ bind(method_data_continue);
853 __ stp(rscratch1, rmethod, Address(sp, 6 * wordSize)); // save Method* and mdp (method data pointer)
854 } else {
855 __ stp(zr, rmethod, Address(sp, 6 * wordSize)); // save Method* (no mdp)
856 }
857
858 // Get mirror and store it in the frame as GC root for this Method*
859 __ load_mirror(rscratch1, rmethod);
860 __ stp(rscratch1, zr, Address(sp, 4 * wordSize));
861
862 __ ldr(rcpool, Address(rmethod, Method::const_offset()));
863 __ ldr(rcpool, Address(rcpool, ConstMethod::constants_offset()));
864 __ ldr(rcpool, Address(rcpool, ConstantPool::cache_offset_in_bytes()));
865 __ stp(rlocals, rcpool, Address(sp, 2 * wordSize));
866
867 __ stp(rfp, lr, Address(sp, 10 * wordSize));
868 __ lea(rfp, Address(sp, 10 * wordSize));
869
870 // set sender sp
871 // leave last_sp as null
872 __ stp(zr, r13, Address(sp, 8 * wordSize));
873
874 // Move SP out of the way
875 if (! native_call) {
876 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
877 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
878 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
879 __ sub(rscratch1, sp, rscratch1, ext::uxtw, 3);
880 __ andr(sp, rscratch1, -16);
881 }
882 }
883
884 // End of helpers
885
886 // Various method entries
887 //------------------------------------------------------------------------------------------------------------------------
888 //
889 //
890
891 // Method entry for java.lang.ref.Reference.get.
892 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
893 // Code: _aload_0, _getfield, _areturn
894 // parameter size = 1
895 //
896 // The code that gets generated by this routine is split into 2 parts:
897 // 1. The "intrinsified" code for G1 (or any SATB based GC),
898 // 2. The slow path - which is an expansion of the regular method entry.
899 //
900 // Notes:-
901 // * In the G1 code we do not check whether we need to block for
902 // a safepoint. If G1 is enabled then we must execute the specialized
903 // code for Reference.get (except when the Reference object is null)
904 // so that we can log the value in the referent field with an SATB
905 // update buffer.
906 // If the code for the getfield template is modified so that the
907 // G1 pre-barrier code is executed when the current method is
908 // Reference.get() then going through the normal method entry
909 // will be fine.
910 // * The G1 code can, however, check the receiver object (the instance
911 // of java.lang.Reference) and jump to the slow path if null. If the
912 // Reference object is null then we obviously cannot fetch the referent
913 // and so we don't need to call the G1 pre-barrier. Thus we can use the
914 // regular method entry code to generate the NPE.
915 //
916 // This code is based on generate_accessor_entry.
917 //
918 // rmethod: Method*
919 // r13: senderSP must preserve for slow path, set SP to it on fast path
920
921 address entry = __ pc();
922
923 const int referent_offset = java_lang_ref_Reference::referent_offset;
924 guarantee(referent_offset > 0, "referent offset not initialized");
925
926 Label slow_path;
927 const Register local_0 = c_rarg0;
928 // Check if local 0 != NULL
929 // If the receiver is null then it is OK to jump to the slow path.
930 __ ldr(local_0, Address(esp, 0));
931 __ cbz(local_0, slow_path);
932
933 __ mov(r19, r13); // Move senderSP to a callee-saved register
934
935 // Load the value of the referent field.
936 const Address field_address(local_0, referent_offset);
937 BarrierSetAssembler *bs = BarrierSet::barrier_set()->barrier_set_assembler();
938 bs->load_at(_masm, IN_HEAP | ON_WEAK_OOP_REF, T_OBJECT, local_0, field_address, /*tmp1*/ rscratch2, /*tmp2*/ rscratch1);
939
940 // areturn
941 __ andr(sp, r19, -16); // done with stack
942 __ ret(lr);
943
944 // generate a vanilla interpreter entry as the slow path
945 __ bind(slow_path);
946 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
947 return entry;
948
949 }
950
951 /**
952 * Method entry for static native methods:
953 * int java.util.zip.CRC32.update(int crc, int b)
954 */
955 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
956 if (UseCRC32Intrinsics) {
957 address entry = __ pc();
958
959 // rmethod: Method*
960 // r13: senderSP must preserved for slow path
961 // esp: args
962
963 Label slow_path;
964 // If we need a safepoint check, generate full interpreter entry.
965 __ safepoint_poll(slow_path);
966
967 // We don't generate local frame and don't align stack because
968 // we call stub code and there is no safepoint on this path.
969
970 // Load parameters
971 const Register crc = c_rarg0; // crc
972 const Register val = c_rarg1; // source java byte value
973 const Register tbl = c_rarg2; // scratch
974
975 // Arguments are reversed on java expression stack
976 __ ldrw(val, Address(esp, 0)); // byte value
977 __ ldrw(crc, Address(esp, wordSize)); // Initial CRC
978
979 unsigned long offset;
980 __ adrp(tbl, ExternalAddress(StubRoutines::crc_table_addr()), offset);
981 __ add(tbl, tbl, offset);
982
983 __ mvnw(crc, crc); // ~crc
984 __ update_byte_crc32(crc, val, tbl);
985 __ mvnw(crc, crc); // ~crc
986
987 // result in c_rarg0
988
989 __ andr(sp, r13, -16);
990 __ ret(lr);
991
992 // generate a vanilla native entry as the slow path
993 __ bind(slow_path);
994 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
995 return entry;
996 }
997 return NULL;
998 }
999
1000 /**
1001 * Method entry for static native methods:
1002 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
1003 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
1004 */
1005 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
1006 if (UseCRC32Intrinsics) {
1007 address entry = __ pc();
1008
1009 // rmethod,: Method*
1010 // r13: senderSP must preserved for slow path
1011
1012 Label slow_path;
1013 // If we need a safepoint check, generate full interpreter entry.
1014 __ safepoint_poll(slow_path);
1015
1016 // We don't generate local frame and don't align stack because
1017 // we call stub code and there is no safepoint on this path.
1018
1019 // Load parameters
1020 const Register crc = c_rarg0; // crc
1021 const Register buf = c_rarg1; // source java byte array address
1022 const Register len = c_rarg2; // length
1023 const Register off = len; // offset (never overlaps with 'len')
1024
1025 // Arguments are reversed on java expression stack
1026 // Calculate address of start element
1027 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
1028 __ ldr(buf, Address(esp, 2*wordSize)); // long buf
1029 __ ldrw(off, Address(esp, wordSize)); // offset
1030 __ add(buf, buf, off); // + offset
1031 __ ldrw(crc, Address(esp, 4*wordSize)); // Initial CRC
1032 } else {
1033 __ ldr(buf, Address(esp, 2*wordSize)); // byte[] array
1034 __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
1035 __ ldrw(off, Address(esp, wordSize)); // offset
1036 __ add(buf, buf, off); // + offset
1037 __ ldrw(crc, Address(esp, 3*wordSize)); // Initial CRC
1038 }
1039 // Can now load 'len' since we're finished with 'off'
1040 __ ldrw(len, Address(esp, 0x0)); // Length
1041
1042 __ andr(sp, r13, -16); // Restore the caller's SP
1043
1044 // We are frameless so we can just jump to the stub.
1045 __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()));
1046
1047 // generate a vanilla native entry as the slow path
1048 __ bind(slow_path);
1049 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
1050 return entry;
1051 }
1052 return NULL;
1053 }
1054
1055 /**
1056 * Method entry for intrinsic-candidate (non-native) methods:
1057 * int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end)
1058 * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long buf, int off, int end)
1059 * Unlike CRC32, CRC32C does not have any methods marked as native
1060 * CRC32C also uses an "end" variable instead of the length variable CRC32 uses
1061 */
1062 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
1063 if (UseCRC32CIntrinsics) {
1064 address entry = __ pc();
1065
1066 // Prepare jump to stub using parameters from the stack
1067 const Register crc = c_rarg0; // initial crc
1068 const Register buf = c_rarg1; // source java byte array address
1069 const Register len = c_rarg2; // len argument to the kernel
1070
1071 const Register end = len; // index of last element to process
1072 const Register off = crc; // offset
1073
1074 __ ldrw(end, Address(esp)); // int end
1075 __ ldrw(off, Address(esp, wordSize)); // int offset
1076 __ sub(len, end, off);
1077 __ ldr(buf, Address(esp, 2*wordSize)); // byte[] buf | long buf
1078 __ add(buf, buf, off); // + offset
1079 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) {
1080 __ ldrw(crc, Address(esp, 4*wordSize)); // long crc
1081 } else {
1082 __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
1083 __ ldrw(crc, Address(esp, 3*wordSize)); // long crc
1084 }
1085
1086 __ andr(sp, r13, -16); // Restore the caller's SP
1087
1088 // Jump to the stub.
1089 __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32C()));
1090
1091 return entry;
1092 }
1093 return NULL;
1094 }
1095
1096 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
1097 // Bang each page in the shadow zone. We can't assume it's been done for
1098 // an interpreter frame with greater than a page of locals, so each page
1099 // needs to be checked. Only true for non-native.
1100 if (UseStackBanging) {
1101 const int n_shadow_pages = JavaThread::stack_shadow_zone_size() / os::vm_page_size();
1102 const int start_page = native_call ? n_shadow_pages : 1;
1103 const int page_size = os::vm_page_size();
1104 for (int pages = start_page; pages <= n_shadow_pages ; pages++) {
1105 __ sub(rscratch2, sp, pages*page_size);
1106 __ str(zr, Address(rscratch2));
1107 }
1108 }
1109 }
1110
1111
1112 // Interpreter stub for calling a native method. (asm interpreter)
1113 // This sets up a somewhat different looking stack for calling the
1114 // native method than the typical interpreter frame setup.
1115 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
1116 // determine code generation flags
1117 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1118
1119 // r1: Method*
1120 // rscratch1: sender sp
1121
1122 address entry_point = __ pc();
1123
1124 const Address constMethod (rmethod, Method::const_offset());
1125 const Address access_flags (rmethod, Method::access_flags_offset());
1126 const Address size_of_parameters(r2, ConstMethod::
1127 size_of_parameters_offset());
1128
1129 // get parameter size (always needed)
1130 __ ldr(r2, constMethod);
1131 __ load_unsigned_short(r2, size_of_parameters);
1132
1133 // Native calls don't need the stack size check since they have no
1134 // expression stack and the arguments are already on the stack and
1135 // we only add a handful of words to the stack.
1136
1137 // rmethod: Method*
1138 // r2: size of parameters
1139 // rscratch1: sender sp
1140
1141 // for natives the size of locals is zero
1142
1143 // compute beginning of parameters (rlocals)
1144 __ add(rlocals, esp, r2, ext::uxtx, 3);
1145 __ add(rlocals, rlocals, -wordSize);
1146
1147 // Pull SP back to minimum size: this avoids holes in the stack
1148 __ andr(sp, esp, -16);
1149
1150 // initialize fixed part of activation frame
1151 generate_fixed_frame(true);
1152 #ifndef PRODUCT
1153 // tell the simulator that a method has been entered
1154 if (NotifySimulator) {
1155 __ notify(Assembler::method_entry);
1156 }
1157 #endif
1158
1159 // make sure method is native & not abstract
1160 #ifdef ASSERT
1161 __ ldrw(r0, access_flags);
1162 {
1163 Label L;
1164 __ tst(r0, JVM_ACC_NATIVE);
1165 __ br(Assembler::NE, L);
1166 __ stop("tried to execute non-native method as native");
1167 __ bind(L);
1168 }
1169 {
1170 Label L;
1171 __ tst(r0, JVM_ACC_ABSTRACT);
1172 __ br(Assembler::EQ, L);
1173 __ stop("tried to execute abstract method in interpreter");
1174 __ bind(L);
1175 }
1176 #endif
1177
1178 // Since at this point in the method invocation the exception
1179 // handler would try to exit the monitor of synchronized methods
1180 // which hasn't been entered yet, we set the thread local variable
1181 // _do_not_unlock_if_synchronized to true. The remove_activation
1182 // will check this flag.
1183
1184 const Address do_not_unlock_if_synchronized(rthread,
1185 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1186 __ mov(rscratch2, true);
1187 __ strb(rscratch2, do_not_unlock_if_synchronized);
1188
1189 // increment invocation count & check for overflow
1190 Label invocation_counter_overflow;
1191 if (inc_counter) {
1192 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1193 }
1194
1195 Label continue_after_compile;
1196 __ bind(continue_after_compile);
1197
1198 bang_stack_shadow_pages(true);
1199
1200 // reset the _do_not_unlock_if_synchronized flag
1201 __ strb(zr, do_not_unlock_if_synchronized);
1202
1203 // check for synchronized methods
1204 // Must happen AFTER invocation_counter check and stack overflow check,
1205 // so method is not locked if overflows.
1206 if (synchronized) {
1207 lock_method();
1208 } else {
1209 // no synchronization necessary
1210 #ifdef ASSERT
1211 {
1212 Label L;
1213 __ ldrw(r0, access_flags);
1214 __ tst(r0, JVM_ACC_SYNCHRONIZED);
1215 __ br(Assembler::EQ, L);
1216 __ stop("method needs synchronization");
1217 __ bind(L);
1218 }
1219 #endif
1220 }
1221
1222 // start execution
1223 #ifdef ASSERT
1224 {
1225 Label L;
1226 const Address monitor_block_top(rfp,
1227 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1228 __ ldr(rscratch1, monitor_block_top);
1229 __ cmp(esp, rscratch1);
1230 __ br(Assembler::EQ, L);
1231 __ stop("broken stack frame setup in interpreter");
1232 __ bind(L);
1233 }
1234 #endif
1235
1236 // jvmti support
1237 __ notify_method_entry();
1238
1239 // work registers
1240 const Register t = r17;
1241 const Register result_handler = r19;
1242
1243 // allocate space for parameters
1244 __ ldr(t, Address(rmethod, Method::const_offset()));
1245 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1246
1247 __ sub(rscratch1, esp, t, ext::uxtx, Interpreter::logStackElementSize);
1248 __ andr(sp, rscratch1, -16);
1249 __ mov(esp, rscratch1);
1250
1251 // get signature handler
1252 {
1253 Label L;
1254 __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
1255 __ cbnz(t, L);
1256 __ call_VM(noreg,
1257 CAST_FROM_FN_PTR(address,
1258 InterpreterRuntime::prepare_native_call),
1259 rmethod);
1260 __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
1261 __ bind(L);
1262 }
1263
1264 // call signature handler
1265 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
1266 "adjust this code");
1267 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == sp,
1268 "adjust this code");
1269 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
1270 "adjust this code");
1271
1272 // The generated handlers do not touch rmethod (the method).
1273 // However, large signatures cannot be cached and are generated
1274 // each time here. The slow-path generator can do a GC on return,
1275 // so we must reload it after the call.
1276 __ blr(t);
1277 __ get_method(rmethod); // slow path can do a GC, reload rmethod
1278
1279
1280 // result handler is in r0
1281 // set result handler
1282 __ mov(result_handler, r0);
1283 // pass mirror handle if static call
1284 {
1285 Label L;
1286 __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
1287 __ tbz(t, exact_log2(JVM_ACC_STATIC), L);
1288 // get mirror
1289 __ load_mirror(t, rmethod);
1290 // copy mirror into activation frame
1291 __ str(t, Address(rfp, frame::interpreter_frame_oop_temp_offset * wordSize));
1292 // pass handle to mirror
1293 __ add(c_rarg1, rfp, frame::interpreter_frame_oop_temp_offset * wordSize);
1294 __ bind(L);
1295 }
1296
1297 // get native function entry point in r10
1298 {
1299 Label L;
1300 __ ldr(r10, Address(rmethod, Method::native_function_offset()));
1301 address unsatisfied = (SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1302 __ mov(rscratch2, unsatisfied);
1303 __ ldr(rscratch2, rscratch2);
1304 __ cmp(r10, rscratch2);
1305 __ br(Assembler::NE, L);
1306 __ call_VM(noreg,
1307 CAST_FROM_FN_PTR(address,
1308 InterpreterRuntime::prepare_native_call),
1309 rmethod);
1310 __ get_method(rmethod);
1311 __ ldr(r10, Address(rmethod, Method::native_function_offset()));
1312 __ bind(L);
1313 }
1314
1315 // pass JNIEnv
1316 __ add(c_rarg0, rthread, in_bytes(JavaThread::jni_environment_offset()));
1317
1318 // It is enough that the pc() points into the right code
1319 // segment. It does not have to be the correct return pc.
1320 __ set_last_Java_frame(esp, rfp, (address)NULL, rscratch1);
1321
1322 // change thread state
1323 #ifdef ASSERT
1324 {
1325 Label L;
1326 __ ldrw(t, Address(rthread, JavaThread::thread_state_offset()));
1327 __ cmp(t, _thread_in_Java);
1328 __ br(Assembler::EQ, L);
1329 __ stop("Wrong thread state in native stub");
1330 __ bind(L);
1331 }
1332 #endif
1333
1334 // Change state to native
1335 __ mov(rscratch1, _thread_in_native);
1336 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1337 __ stlrw(rscratch1, rscratch2);
1338
1339 // Call the native method.
1340 __ blrt(r10, rscratch1);
1341 __ maybe_isb();
1342 __ get_method(rmethod);
1343 // result potentially in r0 or v0
1344
1345 // make room for the pushes we're about to do
1346 __ sub(rscratch1, esp, 4 * wordSize);
1347 __ andr(sp, rscratch1, -16);
1348
1349 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1350 // in order to extract the result of a method call. If the order of these
1351 // pushes change or anything else is added to the stack then the code in
1352 // interpreter_frame_result must also change.
1353 __ push(dtos);
1354 __ push(ltos);
1355
1356 // change thread state
1357 __ mov(rscratch1, _thread_in_native_trans);
1358 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1359 __ stlrw(rscratch1, rscratch2);
1360
1361 if (os::is_MP()) {
1362 if (UseMembar) {
1363 // Force this write out before the read below
1364 __ dmb(Assembler::ISH);
1365 } else {
1366 // Write serialization page so VM thread can do a pseudo remote membar.
1367 // We use the current thread pointer to calculate a thread specific
1368 // offset to write to within the page. This minimizes bus traffic
1369 // due to cache line collision.
1370 __ serialize_memory(rthread, rscratch2);
1371 }
1372 }
1373
1374 // check for safepoint operation in progress and/or pending suspend requests
1375 {
1376 Label L, Continue;
1377 __ safepoint_poll_acquire(L);
1378 __ ldrw(rscratch2, Address(rthread, JavaThread::suspend_flags_offset()));
1379 __ cbz(rscratch2, Continue);
1380 __ bind(L);
1381
1382 // Don't use call_VM as it will see a possible pending exception
1383 // and forward it and never return here preventing us from
1384 // clearing _last_native_pc down below. So we do a runtime call by
1385 // hand.
1386 //
1387 __ mov(c_rarg0, rthread);
1388 __ mov(rscratch2, CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
1389 __ blrt(rscratch2, 1, 0, 0);
1390 __ maybe_isb();
1391 __ get_method(rmethod);
1392 __ reinit_heapbase();
1393 __ bind(Continue);
1394 }
1395
1396 // change thread state
1397 __ mov(rscratch1, _thread_in_Java);
1398 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1399 __ stlrw(rscratch1, rscratch2);
1400
1401 // reset_last_Java_frame
1402 __ reset_last_Java_frame(true);
1403
1404 if (CheckJNICalls) {
1405 // clear_pending_jni_exception_check
1406 __ str(zr, Address(rthread, JavaThread::pending_jni_exception_check_fn_offset()));
1407 }
1408
1409 // reset handle block
1410 __ ldr(t, Address(rthread, JavaThread::active_handles_offset()));
1411 __ str(zr, Address(t, JNIHandleBlock::top_offset_in_bytes()));
1412
1413 // If result is an oop unbox and store it in frame where gc will see it
1414 // and result handler will pick it up
1415
1416 {
1417 Label no_oop, not_weak, store_result;
1418 __ adr(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1419 __ cmp(t, result_handler);
1420 __ br(Assembler::NE, no_oop);
1421 // Unbox oop result, e.g. JNIHandles::resolve result.
1422 __ pop(ltos);
1423 __ resolve_jobject(r0, rthread, t);
1424 __ str(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
1425 // keep stack depth as expected by pushing oop which will eventually be discarded
1426 __ push(ltos);
1427 __ bind(no_oop);
1428 }
1429
1430 {
1431 Label no_reguard;
1432 __ lea(rscratch1, Address(rthread, in_bytes(JavaThread::stack_guard_state_offset())));
1433 __ ldrw(rscratch1, Address(rscratch1));
1434 __ cmp(rscratch1, JavaThread::stack_guard_yellow_reserved_disabled);
1435 __ br(Assembler::NE, no_reguard);
1436
1437 __ pusha(); // XXX only save smashed registers
1438 __ mov(c_rarg0, rthread);
1439 __ mov(rscratch2, CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages));
1440 __ blrt(rscratch2, 0, 0, 0);
1441 __ popa(); // XXX only restore smashed registers
1442 __ bind(no_reguard);
1443 }
1444
1445 // The method register is junk from after the thread_in_native transition
1446 // until here. Also can't call_VM until the bcp has been
1447 // restored. Need bcp for throwing exception below so get it now.
1448 __ get_method(rmethod);
1449
1450 // restore bcp to have legal interpreter frame, i.e., bci == 0 <=>
1451 // rbcp == code_base()
1452 __ ldr(rbcp, Address(rmethod, Method::const_offset())); // get ConstMethod*
1453 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); // get codebase
1454 // handle exceptions (exception handling will handle unlocking!)
1455 {
1456 Label L;
1457 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
1458 __ cbz(rscratch1, L);
1459 // Note: At some point we may want to unify this with the code
1460 // used in call_VM_base(); i.e., we should use the
1461 // StubRoutines::forward_exception code. For now this doesn't work
1462 // here because the rsp is not correctly set at this point.
1463 __ MacroAssembler::call_VM(noreg,
1464 CAST_FROM_FN_PTR(address,
1465 InterpreterRuntime::throw_pending_exception));
1466 __ should_not_reach_here();
1467 __ bind(L);
1468 }
1469
1470 // do unlocking if necessary
1471 {
1472 Label L;
1473 __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
1474 __ tbz(t, exact_log2(JVM_ACC_SYNCHRONIZED), L);
1475 // the code below should be shared with interpreter macro
1476 // assembler implementation
1477 {
1478 Label unlock;
1479 // BasicObjectLock will be first in list, since this is a
1480 // synchronized method. However, need to check that the object
1481 // has not been unlocked by an explicit monitorexit bytecode.
1482
1483 // monitor expect in c_rarg1 for slow unlock path
1484 __ lea (c_rarg1, Address(rfp, // address of first monitor
1485 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1486 wordSize - sizeof(BasicObjectLock))));
1487
1488 __ ldr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
1489 __ cbnz(t, unlock);
1490
1491 // Entry already unlocked, need to throw exception
1492 __ MacroAssembler::call_VM(noreg,
1493 CAST_FROM_FN_PTR(address,
1494 InterpreterRuntime::throw_illegal_monitor_state_exception));
1495 __ should_not_reach_here();
1496
1497 __ bind(unlock);
1498 __ unlock_object(c_rarg1);
1499 }
1500 __ bind(L);
1501 }
1502
1503 // jvmti support
1504 // Note: This must happen _after_ handling/throwing any exceptions since
1505 // the exception handler code notifies the runtime of method exits
1506 // too. If this happens before, method entry/exit notifications are
1507 // not properly paired (was bug - gri 11/22/99).
1508 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1509
1510 // restore potential result in r0:d0, call result handler to
1511 // restore potential result in ST0 & handle result
1512
1513 __ pop(ltos);
1514 __ pop(dtos);
1515
1516 __ blr(result_handler);
1517
1518 // remove activation
1519 __ ldr(esp, Address(rfp,
1520 frame::interpreter_frame_sender_sp_offset *
1521 wordSize)); // get sender sp
1522 // remove frame anchor
1523 __ leave();
1524
1525 // resture sender sp
1526 __ mov(sp, esp);
1527
1528 __ ret(lr);
1529
1530 if (inc_counter) {
1531 // Handle overflow of counter and compile method
1532 __ bind(invocation_counter_overflow);
1533 generate_counter_overflow(continue_after_compile);
1534 }
1535
1536 return entry_point;
1537 }
1538
1539 //
1540 // Generic interpreted method entry to (asm) interpreter
1541 //
1542 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1543 // determine code generation flags
1544 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1545
1546 // rscratch1: sender sp
1547 address entry_point = __ pc();
1548
1549 const Address constMethod(rmethod, Method::const_offset());
1550 const Address access_flags(rmethod, Method::access_flags_offset());
1551 const Address size_of_parameters(r3,
1552 ConstMethod::size_of_parameters_offset());
1553 const Address size_of_locals(r3, ConstMethod::size_of_locals_offset());
1554
1555 // get parameter size (always needed)
1556 // need to load the const method first
1557 __ ldr(r3, constMethod);
1558 __ load_unsigned_short(r2, size_of_parameters);
1559
1560 // r2: size of parameters
1561
1562 __ load_unsigned_short(r3, size_of_locals); // get size of locals in words
1563 __ sub(r3, r3, r2); // r3 = no. of additional locals
1564
1565 // see if we've got enough room on the stack for locals plus overhead.
1566 generate_stack_overflow_check();
1567
1568 // compute beginning of parameters (rlocals)
1569 __ add(rlocals, esp, r2, ext::uxtx, 3);
1570 __ sub(rlocals, rlocals, wordSize);
1571
1572 // Make room for locals
1573 __ sub(rscratch1, esp, r3, ext::uxtx, 3);
1574 __ andr(sp, rscratch1, -16);
1575
1576 // r3 - # of additional locals
1577 // allocate space for locals
1578 // explicitly initialize locals
1579 {
1580 Label exit, loop;
1581 __ ands(zr, r3, r3);
1582 __ br(Assembler::LE, exit); // do nothing if r3 <= 0
1583 __ bind(loop);
1584 __ str(zr, Address(__ post(rscratch1, wordSize)));
1585 __ sub(r3, r3, 1); // until everything initialized
1586 __ cbnz(r3, loop);
1587 __ bind(exit);
1588 }
1589
1590 // And the base dispatch table
1591 __ get_dispatch();
1592
1593 // initialize fixed part of activation frame
1594 generate_fixed_frame(false);
1595 #ifndef PRODUCT
1596 // tell the simulator that a method has been entered
1597 if (NotifySimulator) {
1598 __ notify(Assembler::method_entry);
1599 }
1600 #endif
1601 // make sure method is not native & not abstract
1602 #ifdef ASSERT
1603 __ ldrw(r0, access_flags);
1604 {
1605 Label L;
1606 __ tst(r0, JVM_ACC_NATIVE);
1607 __ br(Assembler::EQ, L);
1608 __ stop("tried to execute native method as non-native");
1609 __ bind(L);
1610 }
1611 {
1612 Label L;
1613 __ tst(r0, JVM_ACC_ABSTRACT);
1614 __ br(Assembler::EQ, L);
1615 __ stop("tried to execute abstract method in interpreter");
1616 __ bind(L);
1617 }
1618 #endif
1619
1620 // Since at this point in the method invocation the exception
1621 // handler would try to exit the monitor of synchronized methods
1622 // which hasn't been entered yet, we set the thread local variable
1623 // _do_not_unlock_if_synchronized to true. The remove_activation
1624 // will check this flag.
1625
1626 const Address do_not_unlock_if_synchronized(rthread,
1627 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1628 __ mov(rscratch2, true);
1629 __ strb(rscratch2, do_not_unlock_if_synchronized);
1630
1631 Label no_mdp;
1632 Register mdp = r3;
1633 __ ldr(mdp, Address(rmethod, Method::method_data_offset()));
1634 __ cbz(mdp, no_mdp);
1635 __ add(mdp, mdp, in_bytes(MethodData::data_offset()));
1636 __ profile_parameters_type(mdp, r1, r2);
1637 __ bind(no_mdp);
1638
1639 // increment invocation count & check for overflow
1640 Label invocation_counter_overflow;
1641 Label profile_method;
1642 Label profile_method_continue;
1643 if (inc_counter) {
1644 generate_counter_incr(&invocation_counter_overflow,
1645 &profile_method,
1646 &profile_method_continue);
1647 if (ProfileInterpreter) {
1648 __ bind(profile_method_continue);
1649 }
1650 }
1651
1652 Label continue_after_compile;
1653 __ bind(continue_after_compile);
1654
1655 bang_stack_shadow_pages(false);
1656
1657 // reset the _do_not_unlock_if_synchronized flag
1658 __ strb(zr, do_not_unlock_if_synchronized);
1659
1660 // check for synchronized methods
1661 // Must happen AFTER invocation_counter check and stack overflow check,
1662 // so method is not locked if overflows.
1663 if (synchronized) {
1664 // Allocate monitor and lock method
1665 lock_method();
1666 } else {
1667 // no synchronization necessary
1668 #ifdef ASSERT
1669 {
1670 Label L;
1671 __ ldrw(r0, access_flags);
1672 __ tst(r0, JVM_ACC_SYNCHRONIZED);
1673 __ br(Assembler::EQ, L);
1674 __ stop("method needs synchronization");
1675 __ bind(L);
1676 }
1677 #endif
1678 }
1679
1680 // start execution
1681 #ifdef ASSERT
1682 {
1683 Label L;
1684 const Address monitor_block_top (rfp,
1685 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1686 __ ldr(rscratch1, monitor_block_top);
1687 __ cmp(esp, rscratch1);
1688 __ br(Assembler::EQ, L);
1689 __ stop("broken stack frame setup in interpreter");
1690 __ bind(L);
1691 }
1692 #endif
1693
1694 // jvmti support
1695 __ notify_method_entry();
1696
1697 __ dispatch_next(vtos);
1698
1699 // invocation counter overflow
1700 if (inc_counter) {
1701 if (ProfileInterpreter) {
1702 // We have decided to profile this method in the interpreter
1703 __ bind(profile_method);
1704 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1705 __ set_method_data_pointer_for_bcp();
1706 // don't think we need this
1707 __ get_method(r1);
1708 __ b(profile_method_continue);
1709 }
1710 // Handle overflow of counter and compile method
1711 __ bind(invocation_counter_overflow);
1712 generate_counter_overflow(continue_after_compile);
1713 }
1714
1715 return entry_point;
1716 }
1717
1718 //-----------------------------------------------------------------------------
1719 // Exceptions
1720
1721 void TemplateInterpreterGenerator::generate_throw_exception() {
1722 // Entry point in previous activation (i.e., if the caller was
1723 // interpreted)
1724 Interpreter::_rethrow_exception_entry = __ pc();
1725 // Restore sp to interpreter_frame_last_sp even though we are going
1726 // to empty the expression stack for the exception processing.
1727 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1728 // r0: exception
1729 // r3: return address/pc that threw exception
1730 __ restore_bcp(); // rbcp points to call/send
1731 __ restore_locals();
1732 __ restore_constant_pool_cache();
1733 __ reinit_heapbase(); // restore rheapbase as heapbase.
1734 __ get_dispatch();
1735
1736 #ifndef PRODUCT
1737 // tell the simulator that the caller method has been reentered
1738 if (NotifySimulator) {
1739 __ get_method(rmethod);
1740 __ notify(Assembler::method_reentry);
1741 }
1742 #endif
1743 // Entry point for exceptions thrown within interpreter code
1744 Interpreter::_throw_exception_entry = __ pc();
1745 // If we came here via a NullPointerException on the receiver of a
1746 // method, rmethod may be corrupt.
1747 __ get_method(rmethod);
1748 // expression stack is undefined here
1749 // r0: exception
1750 // rbcp: exception bcp
1751 __ verify_oop(r0);
1752 __ mov(c_rarg1, r0);
1753
1754 // expression stack must be empty before entering the VM in case of
1755 // an exception
1756 __ empty_expression_stack();
1757 // find exception handler address and preserve exception oop
1758 __ call_VM(r3,
1759 CAST_FROM_FN_PTR(address,
1760 InterpreterRuntime::exception_handler_for_exception),
1761 c_rarg1);
1762
1763 // Calculate stack limit
1764 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
1765 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
1766 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
1767 __ ldr(rscratch2,
1768 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
1769 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
1770 __ andr(sp, rscratch1, -16);
1771
1772 // r0: exception handler entry point
1773 // r3: preserved exception oop
1774 // rbcp: bcp for exception handler
1775 __ push_ptr(r3); // push exception which is now the only value on the stack
1776 __ br(r0); // jump to exception handler (may be _remove_activation_entry!)
1777
1778 // If the exception is not handled in the current frame the frame is
1779 // removed and the exception is rethrown (i.e. exception
1780 // continuation is _rethrow_exception).
1781 //
1782 // Note: At this point the bci is still the bxi for the instruction
1783 // which caused the exception and the expression stack is
1784 // empty. Thus, for any VM calls at this point, GC will find a legal
1785 // oop map (with empty expression stack).
1786
1787 //
1788 // JVMTI PopFrame support
1789 //
1790
1791 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1792 __ empty_expression_stack();
1793 // Set the popframe_processing bit in pending_popframe_condition
1794 // indicating that we are currently handling popframe, so that
1795 // call_VMs that may happen later do not trigger new popframe
1796 // handling cycles.
1797 __ ldrw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
1798 __ orr(r3, r3, JavaThread::popframe_processing_bit);
1799 __ strw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
1800
1801 {
1802 // Check to see whether we are returning to a deoptimized frame.
1803 // (The PopFrame call ensures that the caller of the popped frame is
1804 // either interpreted or compiled and deoptimizes it if compiled.)
1805 // In this case, we can't call dispatch_next() after the frame is
1806 // popped, but instead must save the incoming arguments and restore
1807 // them after deoptimization has occurred.
1808 //
1809 // Note that we don't compare the return PC against the
1810 // deoptimization blob's unpack entry because of the presence of
1811 // adapter frames in C2.
1812 Label caller_not_deoptimized;
1813 __ ldr(c_rarg1, Address(rfp, frame::return_addr_offset * wordSize));
1814 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1815 InterpreterRuntime::interpreter_contains), c_rarg1);
1816 __ cbnz(r0, caller_not_deoptimized);
1817
1818 // Compute size of arguments for saving when returning to
1819 // deoptimized caller
1820 __ get_method(r0);
1821 __ ldr(r0, Address(r0, Method::const_offset()));
1822 __ load_unsigned_short(r0, Address(r0, in_bytes(ConstMethod::
1823 size_of_parameters_offset())));
1824 __ lsl(r0, r0, Interpreter::logStackElementSize);
1825 __ restore_locals(); // XXX do we need this?
1826 __ sub(rlocals, rlocals, r0);
1827 __ add(rlocals, rlocals, wordSize);
1828 // Save these arguments
1829 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1830 Deoptimization::
1831 popframe_preserve_args),
1832 rthread, r0, rlocals);
1833
1834 __ remove_activation(vtos,
1835 /* throw_monitor_exception */ false,
1836 /* install_monitor_exception */ false,
1837 /* notify_jvmdi */ false);
1838
1839 // Inform deoptimization that it is responsible for restoring
1840 // these arguments
1841 __ mov(rscratch1, JavaThread::popframe_force_deopt_reexecution_bit);
1842 __ strw(rscratch1, Address(rthread, JavaThread::popframe_condition_offset()));
1843
1844 // Continue in deoptimization handler
1845 __ ret(lr);
1846
1847 __ bind(caller_not_deoptimized);
1848 }
1849
1850 __ remove_activation(vtos,
1851 /* throw_monitor_exception */ false,
1852 /* install_monitor_exception */ false,
1853 /* notify_jvmdi */ false);
1854
1855 // Restore the last_sp and null it out
1856 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1857 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1858
1859 __ restore_bcp();
1860 __ restore_locals();
1861 __ restore_constant_pool_cache();
1862 __ get_method(rmethod);
1863
1864 // The method data pointer was incremented already during
1865 // call profiling. We have to restore the mdp for the current bcp.
1866 if (ProfileInterpreter) {
1867 __ set_method_data_pointer_for_bcp();
1868 }
1869
1870 // Clear the popframe condition flag
1871 __ strw(zr, Address(rthread, JavaThread::popframe_condition_offset()));
1872 assert(JavaThread::popframe_inactive == 0, "fix popframe_inactive");
1873
1874 #if INCLUDE_JVMTI
1875 {
1876 Label L_done;
1877
1878 __ ldrb(rscratch1, Address(rbcp, 0));
1879 __ cmpw(r1, Bytecodes::_invokestatic);
1880 __ br(Assembler::EQ, L_done);
1881
1882 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1883 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1884
1885 __ ldr(c_rarg0, Address(rlocals, 0));
1886 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), c_rarg0, rmethod, rbcp);
1887
1888 __ cbz(r0, L_done);
1889
1890 __ str(r0, Address(esp, 0));
1891 __ bind(L_done);
1892 }
1893 #endif // INCLUDE_JVMTI
1894
1895 // Restore machine SP
1896 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
1897 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
1898 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
1899 __ ldr(rscratch2,
1900 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
1901 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
1902 __ andr(sp, rscratch1, -16);
1903
1904 __ dispatch_next(vtos);
1905 // end of PopFrame support
1906
1907 Interpreter::_remove_activation_entry = __ pc();
1908
1909 // preserve exception over this code sequence
1910 __ pop_ptr(r0);
1911 __ str(r0, Address(rthread, JavaThread::vm_result_offset()));
1912 // remove the activation (without doing throws on illegalMonitorExceptions)
1913 __ remove_activation(vtos, false, true, false);
1914 // restore exception
1915 // restore exception
1916 __ get_vm_result(r0, rthread);
1917
1918 // In between activations - previous activation type unknown yet
1919 // compute continuation point - the continuation point expects the
1920 // following registers set up:
1921 //
1922 // r0: exception
1923 // lr: return address/pc that threw exception
1924 // rsp: expression stack of caller
1925 // rfp: fp of caller
1926 // FIXME: There's no point saving LR here because VM calls don't trash it
1927 __ stp(r0, lr, Address(__ pre(sp, -2 * wordSize))); // save exception & return address
1928 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1929 SharedRuntime::exception_handler_for_return_address),
1930 rthread, lr);
1931 __ mov(r1, r0); // save exception handler
1932 __ ldp(r0, lr, Address(__ post(sp, 2 * wordSize))); // restore exception & return address
1933 // We might be returning to a deopt handler that expects r3 to
1934 // contain the exception pc
1935 __ mov(r3, lr);
1936 // Note that an "issuing PC" is actually the next PC after the call
1937 __ br(r1); // jump to exception
1938 // handler of caller
1939 }
1940
1941
1942 //
1943 // JVMTI ForceEarlyReturn support
1944 //
1945 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1946 address entry = __ pc();
1947
1948 __ restore_bcp();
1949 __ restore_locals();
1950 __ empty_expression_stack();
1951 __ load_earlyret_value(state);
1952
1953 __ ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset()));
1954 Address cond_addr(rscratch1, JvmtiThreadState::earlyret_state_offset());
1955
1956 // Clear the earlyret state
1957 assert(JvmtiThreadState::earlyret_inactive == 0, "should be");
1958 __ str(zr, cond_addr);
1959
1960 __ remove_activation(state,
1961 false, /* throw_monitor_exception */
1962 false, /* install_monitor_exception */
1963 true); /* notify_jvmdi */
1964 __ ret(lr);
1965
1966 return entry;
1967 } // end of ForceEarlyReturn support
1968
1969
1970
1971 //-----------------------------------------------------------------------------
1972 // Helper for vtos entry point generation
1973
1974 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1975 address& bep,
1976 address& cep,
1977 address& sep,
1978 address& aep,
1979 address& iep,
1980 address& lep,
1981 address& fep,
1982 address& dep,
1983 address& vep) {
1984 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1985 Label L;
1986 aep = __ pc(); __ push_ptr(); __ b(L);
1987 fep = __ pc(); __ push_f(); __ b(L);
1988 dep = __ pc(); __ push_d(); __ b(L);
1989 lep = __ pc(); __ push_l(); __ b(L);
1990 bep = cep = sep =
1991 iep = __ pc(); __ push_i();
1992 vep = __ pc();
1993 __ bind(L);
1994 generate_and_dispatch(t);
1995 }
1996
1997 //-----------------------------------------------------------------------------
1998
1999 // Non-product code
2000 #ifndef PRODUCT
2001 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
2002 address entry = __ pc();
2003
2004 __ push(lr);
2005 __ push(state);
2006 __ push(RegSet::range(r0, r15), sp);
2007 __ mov(c_rarg2, r0); // Pass itos
2008 __ call_VM(noreg,
2009 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
2010 c_rarg1, c_rarg2, c_rarg3);
2011 __ pop(RegSet::range(r0, r15), sp);
2012 __ pop(state);
2013 __ pop(lr);
2014 __ ret(lr); // return from result handler
2015
2016 return entry;
2017 }
2018
2019 void TemplateInterpreterGenerator::count_bytecode() {
2020 Register rscratch3 = r0;
2021 __ push(rscratch1);
2022 __ push(rscratch2);
2023 __ push(rscratch3);
2024 __ mov(rscratch3, (address) &BytecodeCounter::_counter_value);
2025 __ atomic_add(noreg, 1, rscratch3);
2026 __ pop(rscratch3);
2027 __ pop(rscratch2);
2028 __ pop(rscratch1);
2029 }
2030
2031 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { ; }
2032
2033 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { ; }
2034
2035
2036 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
2037 // Call a little run-time stub to avoid blow-up for each bytecode.
2038 // The run-time runtime saves the right registers, depending on
2039 // the tosca in-state for the given template.
2040
2041 assert(Interpreter::trace_code(t->tos_in()) != NULL,
2042 "entry must have been generated");
2043 __ bl(Interpreter::trace_code(t->tos_in()));
2044 __ reinit_heapbase();
2045 }
2046
2047
2048 void TemplateInterpreterGenerator::stop_interpreter_at() {
2049 Label L;
2050 __ push(rscratch1);
2051 __ mov(rscratch1, (address) &BytecodeCounter::_counter_value);
2052 __ ldr(rscratch1, Address(rscratch1));
2053 __ mov(rscratch2, StopInterpreterAt);
2054 __ cmpw(rscratch1, rscratch2);
2055 __ br(Assembler::NE, L);
2056 __ brk(0);
2057 __ bind(L);
2058 __ pop(rscratch1);
2059 }
2060
2061 #ifdef BUILTIN_SIM
2062
2063 #include <sys/mman.h>
2064 #include <unistd.h>
2065
2066 extern "C" {
2067 static int PAGESIZE = getpagesize();
2068 int is_mapped_address(u_int64_t address)
2069 {
2070 address = (address & ~((u_int64_t)PAGESIZE - 1));
2071 if (msync((void *)address, PAGESIZE, MS_ASYNC) == 0) {
2072 return true;
2073 }
2074 if (errno != ENOMEM) {
2075 return true;
2076 }
2077 return false;
2078 }
2079
2080 void bccheck1(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode)
2081 {
2082 if (method != 0) {
2083 method[0] = '\0';
2084 }
2085 if (bcidx != 0) {
2086 *bcidx = -2;
2087 }
2088 if (decode != 0) {
2089 decode[0] = 0;
2090 }
2091
2092 if (framesize != 0) {
2093 *framesize = -1;
2094 }
2095
2096 if (Interpreter::contains((address)pc)) {
2097 AArch64Simulator *sim = AArch64Simulator::get_current(UseSimulatorCache, DisableBCCheck);
2098 Method* meth;
2099 address bcp;
2100 if (fp) {
2101 #define FRAME_SLOT_METHOD 3
2102 #define FRAME_SLOT_BCP 7
2103 meth = (Method*)sim->getMemory()->loadU64(fp - (FRAME_SLOT_METHOD << 3));
2104 bcp = (address)sim->getMemory()->loadU64(fp - (FRAME_SLOT_BCP << 3));
2105 #undef FRAME_SLOT_METHOD
2106 #undef FRAME_SLOT_BCP
2107 } else {
2108 meth = (Method*)sim->getCPUState().xreg(RMETHOD, 0);
2109 bcp = (address)sim->getCPUState().xreg(RBCP, 0);
2110 }
2111 if (meth->is_native()) {
2112 return;
2113 }
2114 if(method && meth->is_method()) {
2115 ResourceMark rm;
2116 method[0] = 'I';
2117 method[1] = ' ';
2118 meth->name_and_sig_as_C_string(method + 2, 398);
2119 }
2120 if (bcidx) {
2121 if (meth->contains(bcp)) {
2122 *bcidx = meth->bci_from(bcp);
2123 } else {
2124 *bcidx = -2;
2125 }
2126 }
2127 if (decode) {
2128 if (!BytecodeTracer::closure()) {
2129 BytecodeTracer::set_closure(BytecodeTracer::std_closure());
2130 }
2131 stringStream str(decode, 400);
2132 BytecodeTracer::trace(meth, bcp, &str);
2133 }
2134 } else {
2135 if (method) {
2136 CodeBlob *cb = CodeCache::find_blob((address)pc);
2137 if (cb != NULL) {
2138 if (cb->is_nmethod()) {
2139 ResourceMark rm;
2140 nmethod* nm = (nmethod*)cb;
2141 method[0] = 'C';
2142 method[1] = ' ';
2143 nm->method()->name_and_sig_as_C_string(method + 2, 398);
2144 } else if (cb->is_adapter_blob()) {
2145 strcpy(method, "B adapter blob");
2146 } else if (cb->is_runtime_stub()) {
2147 strcpy(method, "B runtime stub");
2148 } else if (cb->is_exception_stub()) {
2149 strcpy(method, "B exception stub");
2150 } else if (cb->is_deoptimization_stub()) {
2151 strcpy(method, "B deoptimization stub");
2152 } else if (cb->is_safepoint_stub()) {
2153 strcpy(method, "B safepoint stub");
2154 } else if (cb->is_uncommon_trap_stub()) {
2155 strcpy(method, "B uncommon trap stub");
2156 } else if (cb->contains((address)StubRoutines::call_stub())) {
2157 strcpy(method, "B call stub");
2158 } else {
2159 strcpy(method, "B unknown blob : ");
2160 strcat(method, cb->name());
2161 }
2162 if (framesize != NULL) {
2163 *framesize = cb->frame_size();
2164 }
2165 }
2166 }
2167 }
2168 }
2169
2170
2171 JNIEXPORT void bccheck(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode)
2172 {
2173 bccheck1(pc, fp, method, bcidx, framesize, decode);
2174 }
2175 }
2176
2177 #endif // BUILTIN_SIM
2178 #endif // !PRODUCT