1 /*
2 * Copyright (c) 2003, 2016, 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 "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/interp_masm.hpp"
32 #include "interpreter/templateInterpreterGenerator.hpp"
33 #include "interpreter/templateTable.hpp"
34 #include "interpreter/bytecodeTracer.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/arrayOop.hpp"
37 #include "oops/methodData.hpp"
38 #include "oops/method.hpp"
39 #include "oops/oop.inline.hpp"
40 #include "prims/jvmtiExport.hpp"
41 #include "prims/jvmtiThreadState.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/deoptimization.hpp"
44 #include "runtime/frame.inline.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "runtime/synchronizer.hpp"
48 #include "runtime/timer.hpp"
49 #include "runtime/vframeArray.hpp"
50 #include "utilities/debug.hpp"
51 #include <sys/types.h>
52
53 #ifndef PRODUCT
54 #include "oops/method.hpp"
55 #endif // !PRODUCT
56
57 #ifdef BUILTIN_SIM
58 #include "../../../../../../simulator/simulator.hpp"
59 #endif
60
61 // Size of interpreter code. Increase if too small. Interpreter will
62 // fail with a guarantee ("not enough space for interpreter generation");
63 // if too small.
64 // Run with +PrintInterpreter to get the VM to print out the size.
65 // Max size with JVMTI
66 int TemplateInterpreter::InterpreterCodeSize = 200 * 1024;
67
68 #define __ _masm->
69
70 //-----------------------------------------------------------------------------
71
72 extern "C" void entry(CodeBuffer*);
73
74 //-----------------------------------------------------------------------------
75
76 address TemplateInterpreterGenerator::generate_slow_signature_handler() {
77 address entry = __ pc();
78
79 __ andr(esp, esp, -16);
80 __ mov(c_rarg3, esp);
81 // rmethod
82 // rlocals
83 // c_rarg3: first stack arg - wordSize
84
85 // adjust sp
86 __ sub(sp, c_rarg3, 18 * wordSize);
87 __ str(lr, Address(__ pre(sp, -2 * wordSize)));
88 __ call_VM(noreg,
89 CAST_FROM_FN_PTR(address,
90 InterpreterRuntime::slow_signature_handler),
91 rmethod, rlocals, c_rarg3);
92
93 // r0: result handler
94
95 // Stack layout:
96 // rsp: return address <- sp
97 // 1 garbage
98 // 8 integer args (if static first is unused)
99 // 1 float/double identifiers
100 // 8 double args
101 // stack args <- esp
102 // garbage
103 // expression stack bottom
104 // bcp (NULL)
105 // ...
106
107 // Restore LR
108 __ ldr(lr, Address(__ post(sp, 2 * wordSize)));
109
110 // Do FP first so we can use c_rarg3 as temp
111 __ ldrw(c_rarg3, Address(sp, 9 * wordSize)); // float/double identifiers
112
113 for (int i = 0; i < Argument::n_float_register_parameters_c; i++) {
114 const FloatRegister r = as_FloatRegister(i);
115
116 Label d, done;
117
118 __ tbnz(c_rarg3, i, d);
119 __ ldrs(r, Address(sp, (10 + i) * wordSize));
120 __ b(done);
121 __ bind(d);
122 __ ldrd(r, Address(sp, (10 + i) * wordSize));
123 __ bind(done);
124 }
125
126 // c_rarg0 contains the result from the call of
127 // InterpreterRuntime::slow_signature_handler so we don't touch it
128 // here. It will be loaded with the JNIEnv* later.
129 __ ldr(c_rarg1, Address(sp, 1 * wordSize));
130 for (int i = c_rarg2->encoding(); i <= c_rarg7->encoding(); i += 2) {
131 Register rm = as_Register(i), rn = as_Register(i+1);
132 __ ldp(rm, rn, Address(sp, i * wordSize));
133 }
134
135 __ add(sp, sp, 18 * wordSize);
136 __ ret(lr);
137
138 return entry;
139 }
140
141
142 //
143 // Various method entries
144 //
145
146 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
147 // rmethod: Method*
148 // r13: sender sp
149 // esp: args
150
151 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
152
153 // These don't need a safepoint check because they aren't virtually
154 // callable. We won't enter these intrinsics from compiled code.
155 // If in the future we added an intrinsic which was virtually callable
156 // we'd have to worry about how to safepoint so that this code is used.
157
158 // mathematical functions inlined by compiler
159 // (interpreter must provide identical implementation
160 // in order to avoid monotonicity bugs when switching
161 // from interpreter to compiler in the middle of some
162 // computation)
163 //
164 // stack:
165 // [ arg ] <-- esp
166 // [ arg ]
167 // retaddr in lr
168
169 address entry_point = NULL;
170 Register continuation = lr;
171 switch (kind) {
172 case Interpreter::java_lang_math_abs:
173 entry_point = __ pc();
174 __ ldrd(v0, Address(esp));
175 __ fabsd(v0, v0);
176 __ mov(sp, r13); // Restore caller's SP
177 break;
178 case Interpreter::java_lang_math_sqrt:
179 entry_point = __ pc();
180 __ ldrd(v0, Address(esp));
181 __ fsqrtd(v0, v0);
182 __ mov(sp, r13);
183 break;
184 case Interpreter::java_lang_math_sin :
185 case Interpreter::java_lang_math_cos :
186 case Interpreter::java_lang_math_tan :
187 case Interpreter::java_lang_math_log :
188 case Interpreter::java_lang_math_log10 :
189 case Interpreter::java_lang_math_exp :
190 entry_point = __ pc();
191 __ ldrd(v0, Address(esp));
192 __ mov(sp, r13);
193 __ mov(r19, lr);
194 continuation = r19; // The first callee-saved register
195 generate_transcendental_entry(kind, 1);
196 break;
197 case Interpreter::java_lang_math_pow :
198 entry_point = __ pc();
199 __ mov(r19, lr);
200 continuation = r19;
201 __ ldrd(v0, Address(esp, 2 * Interpreter::stackElementSize));
202 __ ldrd(v1, Address(esp));
203 __ mov(sp, r13);
204 generate_transcendental_entry(kind, 2);
205 break;
206 default:
207 ;
208 }
209 if (entry_point) {
210 __ br(continuation);
211 }
212
213 return entry_point;
214 }
215
216 // double trigonometrics and transcendentals
217 // static jdouble dsin(jdouble x);
218 // static jdouble dcos(jdouble x);
219 // static jdouble dtan(jdouble x);
220 // static jdouble dlog(jdouble x);
221 // static jdouble dlog10(jdouble x);
222 // static jdouble dexp(jdouble x);
223 // static jdouble dpow(jdouble x, jdouble y);
224
225 void TemplateInterpreterGenerator::generate_transcendental_entry(AbstractInterpreter::MethodKind kind, int fpargs) {
226 address fn;
227 switch (kind) {
228 case Interpreter::java_lang_math_sin :
229 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
230 break;
231 case Interpreter::java_lang_math_cos :
232 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
233 break;
234 case Interpreter::java_lang_math_tan :
235 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
236 break;
237 case Interpreter::java_lang_math_log :
238 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
239 break;
240 case Interpreter::java_lang_math_log10 :
241 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
242 break;
243 case Interpreter::java_lang_math_exp :
244 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dexp);
245 break;
246 case Interpreter::java_lang_math_pow :
247 fpargs = 2;
248 fn = CAST_FROM_FN_PTR(address, SharedRuntime::dpow);
249 break;
250 default:
251 ShouldNotReachHere();
252 fn = NULL; // unreachable
253 }
254 const int gpargs = 0, rtype = 3;
255 __ mov(rscratch1, fn);
256 __ blrt(rscratch1, gpargs, fpargs, rtype);
257 }
258
259 // Abstract method entry
260 // Attempt to execute abstract method. Throw exception
261 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
262 // rmethod: Method*
263 // r13: sender SP
264
265 address entry_point = __ pc();
266
267 // abstract method entry
268
269 // pop return address, reset last_sp to NULL
270 __ empty_expression_stack();
271 __ restore_bcp(); // bcp must be correct for exception handler (was destroyed)
272 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
273
274 // throw exception
275 __ call_VM(noreg, CAST_FROM_FN_PTR(address,
276 InterpreterRuntime::throw_AbstractMethodError));
277 // the call_VM checks for exception, so we should never return here.
278 __ should_not_reach_here();
279
280 return entry_point;
281 }
282
283 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
284 address entry = __ pc();
285
286 #ifdef ASSERT
287 {
288 Label L;
289 __ ldr(rscratch1, Address(rfp,
290 frame::interpreter_frame_monitor_block_top_offset *
291 wordSize));
292 __ mov(rscratch2, sp);
293 __ cmp(rscratch1, rscratch2); // maximal rsp for current rfp (stack
294 // grows negative)
295 __ br(Assembler::HS, L); // check if frame is complete
296 __ stop ("interpreter frame not set up");
297 __ bind(L);
298 }
299 #endif // ASSERT
300 // Restore bcp under the assumption that the current frame is still
301 // interpreted
302 __ restore_bcp();
303
304 // expression stack must be empty before entering the VM if an
305 // exception happened
306 __ empty_expression_stack();
307 // throw exception
308 __ call_VM(noreg,
309 CAST_FROM_FN_PTR(address,
310 InterpreterRuntime::throw_StackOverflowError));
311 return entry;
312 }
313
314 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
315 const char* name) {
316 address entry = __ pc();
317 // expression stack must be empty before entering the VM if an
318 // exception happened
319 __ empty_expression_stack();
320 // setup parameters
321 // ??? convention: expect aberrant index in register r1
322 __ movw(c_rarg2, r1);
323 __ mov(c_rarg1, (address)name);
324 __ call_VM(noreg,
325 CAST_FROM_FN_PTR(address,
326 InterpreterRuntime::
327 throw_ArrayIndexOutOfBoundsException),
328 c_rarg1, c_rarg2);
329 return entry;
330 }
331
332 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
333 address entry = __ pc();
334
335 // object is at TOS
336 __ pop(c_rarg1);
337
338 // expression stack must be empty before entering the VM if an
339 // exception happened
340 __ empty_expression_stack();
341
342 __ call_VM(noreg,
343 CAST_FROM_FN_PTR(address,
344 InterpreterRuntime::
345 throw_ClassCastException),
346 c_rarg1);
347 return entry;
348 }
349
350 address TemplateInterpreterGenerator::generate_exception_handler_common(
351 const char* name, const char* message, bool pass_oop) {
352 assert(!pass_oop || message == NULL, "either oop or message but not both");
353 address entry = __ pc();
354 if (pass_oop) {
355 // object is at TOS
356 __ pop(c_rarg2);
357 }
358 // expression stack must be empty before entering the VM if an
359 // exception happened
360 __ empty_expression_stack();
361 // setup parameters
362 __ lea(c_rarg1, Address((address)name));
363 if (pass_oop) {
364 __ call_VM(r0, CAST_FROM_FN_PTR(address,
365 InterpreterRuntime::
366 create_klass_exception),
367 c_rarg1, c_rarg2);
368 } else {
369 // kind of lame ExternalAddress can't take NULL because
370 // external_word_Relocation will assert.
371 if (message != NULL) {
372 __ lea(c_rarg2, Address((address)message));
373 } else {
374 __ mov(c_rarg2, NULL_WORD);
375 }
376 __ call_VM(r0,
377 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
378 c_rarg1, c_rarg2);
379 }
380 // throw exception
381 __ b(address(Interpreter::throw_exception_entry()));
382 return entry;
383 }
384
385 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
386 address entry = __ pc();
387 // NULL last_sp until next java call
388 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
389 __ dispatch_next(state);
390 return entry;
391 }
392
393 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
394 address entry = __ pc();
395
396 // Restore stack bottom in case i2c adjusted stack
397 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
398 // and NULL it as marker that esp is now tos until next java call
399 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
400 __ restore_bcp();
401 __ restore_locals();
402 __ restore_constant_pool_cache();
403 __ get_method(rmethod);
404
405 // Pop N words from the stack
406 __ get_cache_and_index_at_bcp(r1, r2, 1, index_size);
407 __ ldr(r1, Address(r1, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
408 __ andr(r1, r1, ConstantPoolCacheEntry::parameter_size_mask);
409
410 __ add(esp, esp, r1, Assembler::LSL, 3);
411
412 // Restore machine SP
413 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
414 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
415 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
416 __ ldr(rscratch2,
417 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
418 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
419 __ andr(sp, rscratch1, -16);
420
421 #ifndef PRODUCT
422 // tell the simulator that the method has been reentered
423 if (NotifySimulator) {
424 __ notify(Assembler::method_reentry);
425 }
426 #endif
427 __ get_dispatch();
428 __ dispatch_next(state, step);
429
430 return entry;
431 }
432
433 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
434 int step) {
435 address entry = __ pc();
436 __ restore_bcp();
437 __ restore_locals();
438 __ restore_constant_pool_cache();
439 __ get_method(rmethod);
440 __ get_dispatch();
441
442 // Calculate stack limit
443 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
444 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
445 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
446 __ ldr(rscratch2,
447 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
448 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
449 __ andr(sp, rscratch1, -16);
450
451 // Restore expression stack pointer
452 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
453 // NULL last_sp until next java call
454 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
455
456 #if INCLUDE_JVMCI
457 // Check if we need to take lock at entry of synchronized method.
458 if (UseJVMCICompiler) {
459 Label L;
460 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
461 __ cbz(rscratch1, L);
462 // Clear flag.
463 __ strb(zr, Address(rthread, JavaThread::pending_monitorenter_offset()));
464 // Take lock.
465 lock_method();
466 __ bind(L);
467 }
468 #endif
469 // handle exceptions
470 {
471 Label L;
472 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
473 __ cbz(rscratch1, L);
474 __ call_VM(noreg,
475 CAST_FROM_FN_PTR(address,
476 InterpreterRuntime::throw_pending_exception));
477 __ should_not_reach_here();
478 __ bind(L);
479 }
480
481 __ dispatch_next(state, step);
482 return entry;
483 }
484
485 address TemplateInterpreterGenerator::generate_result_handler_for(
486 BasicType type) {
487 address entry = __ pc();
488 switch (type) {
489 case T_BOOLEAN: __ uxtb(r0, r0); break;
490 case T_CHAR : __ uxth(r0, r0); break;
491 case T_BYTE : __ sxtb(r0, r0); break;
492 case T_SHORT : __ sxth(r0, r0); break;
493 case T_INT : __ uxtw(r0, r0); break; // FIXME: We almost certainly don't need this
494 case T_LONG : /* nothing to do */ break;
495 case T_VOID : /* nothing to do */ break;
496 case T_FLOAT : /* nothing to do */ break;
497 case T_DOUBLE : /* nothing to do */ break;
498 case T_OBJECT :
499 // retrieve result from frame
500 __ ldr(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
501 // and verify it
502 __ verify_oop(r0);
503 break;
504 default : ShouldNotReachHere();
505 }
506 __ ret(lr); // return from result handler
507 return entry;
508 }
509
510 address TemplateInterpreterGenerator::generate_safept_entry_for(
511 TosState state,
512 address runtime_entry) {
513 address entry = __ pc();
514 __ push(state);
515 __ call_VM(noreg, runtime_entry);
516 __ membar(Assembler::AnyAny);
517 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
518 return entry;
519 }
520
521 // Helpers for commoning out cases in the various type of method entries.
522 //
523
524
525 // increment invocation count & check for overflow
526 //
527 // Note: checking for negative value instead of overflow
528 // so we have a 'sticky' overflow test
529 //
530 // rmethod: method
531 //
532 void TemplateInterpreterGenerator::generate_counter_incr(
533 Label* overflow,
534 Label* profile_method,
535 Label* profile_method_continue) {
536 Label done;
537 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
538 if (TieredCompilation) {
539 int increment = InvocationCounter::count_increment;
540 Label no_mdo;
541 if (ProfileInterpreter) {
542 // Are we profiling?
543 __ ldr(r0, Address(rmethod, Method::method_data_offset()));
544 __ cbz(r0, no_mdo);
545 // Increment counter in the MDO
546 const Address mdo_invocation_counter(r0, in_bytes(MethodData::invocation_counter_offset()) +
547 in_bytes(InvocationCounter::counter_offset()));
548 const Address mask(r0, in_bytes(MethodData::invoke_mask_offset()));
549 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rscratch1, rscratch2, false, Assembler::EQ, overflow);
550 __ b(done);
551 }
552 __ bind(no_mdo);
553 // Increment counter in MethodCounters
554 const Address invocation_counter(rscratch2,
555 MethodCounters::invocation_counter_offset() +
556 InvocationCounter::counter_offset());
557 __ get_method_counters(rmethod, rscratch2, done);
558 const Address mask(rscratch2, in_bytes(MethodCounters::invoke_mask_offset()));
559 __ increment_mask_and_jump(invocation_counter, increment, mask, rscratch1, r1, false, Assembler::EQ, overflow);
560 __ bind(done);
561 } else { // not TieredCompilation
562 const Address backedge_counter(rscratch2,
563 MethodCounters::backedge_counter_offset() +
564 InvocationCounter::counter_offset());
565 const Address invocation_counter(rscratch2,
566 MethodCounters::invocation_counter_offset() +
567 InvocationCounter::counter_offset());
568
569 __ get_method_counters(rmethod, rscratch2, done);
570
571 if (ProfileInterpreter) { // %%% Merge this into MethodData*
572 __ ldrw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset()));
573 __ addw(r1, r1, 1);
574 __ strw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset()));
575 }
576 // Update standard invocation counters
577 __ ldrw(r1, invocation_counter);
578 __ ldrw(r0, backedge_counter);
579
580 __ addw(r1, r1, InvocationCounter::count_increment);
581 __ andw(r0, r0, InvocationCounter::count_mask_value);
582
583 __ strw(r1, invocation_counter);
584 __ addw(r0, r0, r1); // add both counters
585
586 // profile_method is non-null only for interpreted method so
587 // profile_method != NULL == !native_call
588
589 if (ProfileInterpreter && profile_method != NULL) {
590 // Test to see if we should create a method data oop
591 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset()));
592 __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
593 __ cmpw(r0, rscratch2);
594 __ br(Assembler::LT, *profile_method_continue);
595
596 // if no method data exists, go to profile_method
597 __ test_method_data_pointer(rscratch2, *profile_method);
598 }
599
600 {
601 __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset()));
602 __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
603 __ cmpw(r0, rscratch2);
604 __ br(Assembler::HS, *overflow);
605 }
606 __ bind(done);
607 }
608 }
609
610 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
611
612 // Asm interpreter on entry
613 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
614 // Everything as it was on entry
615
616 // InterpreterRuntime::frequency_counter_overflow takes two
617 // arguments, the first (thread) is passed by call_VM, the second
618 // indicates if the counter overflow occurs at a backwards branch
619 // (NULL bcp). We pass zero for it. The call returns the address
620 // of the verified entry point for the method or NULL if the
621 // compilation did not complete (either went background or bailed
622 // out).
623 __ mov(c_rarg1, 0);
624 __ call_VM(noreg,
625 CAST_FROM_FN_PTR(address,
626 InterpreterRuntime::frequency_counter_overflow),
627 c_rarg1);
628
629 __ b(do_continue);
630 }
631
632 // See if we've got enough room on the stack for locals plus overhead
633 // below JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
634 // without going through the signal handler, i.e., reserved and yellow zones
635 // will not be made usable. The shadow zone must suffice to handle the
636 // overflow.
637 // The expression stack grows down incrementally, so the normal guard
638 // page mechanism will work for that.
639 //
640 // NOTE: Since the additional locals are also always pushed (wasn't
641 // obvious in generate_method_entry) so the guard should work for them
642 // too.
643 //
644 // Args:
645 // r3: number of additional locals this frame needs (what we must check)
646 // rmethod: Method*
647 //
648 // Kills:
649 // r0
650 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
651
652 // monitor entry size: see picture of stack set
653 // (generate_method_entry) and frame_amd64.hpp
654 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
655
656 // total overhead size: entry_size + (saved rbp through expr stack
657 // bottom). be sure to change this if you add/subtract anything
658 // to/from the overhead area
659 const int overhead_size =
660 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
661
662 const int page_size = os::vm_page_size();
663
664 Label after_frame_check;
665
666 // see if the frame is greater than one page in size. If so,
667 // then we need to verify there is enough stack space remaining
668 // for the additional locals.
669 //
670 // Note that we use SUBS rather than CMP here because the immediate
671 // field of this instruction may overflow. SUBS can cope with this
672 // because it is a macro that will expand to some number of MOV
673 // instructions and a register operation.
674 __ subs(rscratch1, r3, (page_size - overhead_size) / Interpreter::stackElementSize);
675 __ br(Assembler::LS, after_frame_check);
676
677 // compute rsp as if this were going to be the last frame on
678 // the stack before the red zone
679
680 // locals + overhead, in bytes
681 __ mov(r0, overhead_size);
682 __ add(r0, r0, r3, Assembler::LSL, Interpreter::logStackElementSize); // 2 slots per parameter.
683
684 const Address stack_limit(rthread, JavaThread::stack_overflow_limit_offset());
685 __ ldr(rscratch1, stack_limit);
686
687 #ifdef ASSERT
688 Label limit_okay;
689 // Verify that thread stack limit is non-zero.
690 __ cbnz(rscratch1, limit_okay);
691 __ stop("stack overflow limit is zero");
692 __ bind(limit_okay);
693 #endif
694
695 // Add stack limit to locals.
696 __ add(r0, r0, rscratch1);
697
698 // Check against the current stack bottom.
699 __ cmp(sp, r0);
700 __ br(Assembler::HI, after_frame_check);
701
702 // Remove the incoming args, peeling the machine SP back to where it
703 // was in the caller. This is not strictly necessary, but unless we
704 // do so the stack frame may have a garbage FP; this ensures a
705 // correct call stack that we can always unwind. The ANDR should be
706 // unnecessary because the sender SP in r13 is always aligned, but
707 // it doesn't hurt.
708 __ andr(sp, r13, -16);
709
710 // Note: the restored frame is not necessarily interpreted.
711 // Use the shared runtime version of the StackOverflowError.
712 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
713 __ far_jump(RuntimeAddress(StubRoutines::throw_StackOverflowError_entry()));
714
715 // all done with frame size check
716 __ bind(after_frame_check);
717 }
718
719 // Allocate monitor and lock method (asm interpreter)
720 //
721 // Args:
722 // rmethod: Method*
723 // rlocals: locals
724 //
725 // Kills:
726 // r0
727 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
728 // rscratch1, rscratch2 (scratch regs)
729 void TemplateInterpreterGenerator::lock_method() {
730 // synchronize method
731 const Address access_flags(rmethod, Method::access_flags_offset());
732 const Address monitor_block_top(
733 rfp,
734 frame::interpreter_frame_monitor_block_top_offset * wordSize);
735 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
736
737 #ifdef ASSERT
738 {
739 Label L;
740 __ ldrw(r0, access_flags);
741 __ tst(r0, JVM_ACC_SYNCHRONIZED);
742 __ br(Assembler::NE, L);
743 __ stop("method doesn't need synchronization");
744 __ bind(L);
745 }
746 #endif // ASSERT
747
748 // get synchronization object
749 {
750 Label done;
751 __ ldrw(r0, access_flags);
752 __ tst(r0, JVM_ACC_STATIC);
753 // get receiver (assume this is frequent case)
754 __ ldr(r0, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
755 __ br(Assembler::EQ, done);
756 __ load_mirror(r0, rmethod);
757
758 #ifdef ASSERT
759 {
760 Label L;
761 __ cbnz(r0, L);
762 __ stop("synchronization object is NULL");
763 __ bind(L);
764 }
765 #endif // ASSERT
766
767 __ bind(done);
768 }
769
770 // add space for monitor & lock
771 __ sub(sp, sp, entry_size); // add space for a monitor entry
772 __ sub(esp, esp, entry_size);
773 __ mov(rscratch1, esp);
774 __ str(rscratch1, monitor_block_top); // set new monitor block top
775 // store object
776 __ str(r0, Address(esp, BasicObjectLock::obj_offset_in_bytes()));
777 __ mov(c_rarg1, esp); // object address
778 __ lock_object(c_rarg1);
779 }
780
781 // Generate a fixed interpreter frame. This is identical setup for
782 // interpreted methods and for native methods hence the shared code.
783 //
784 // Args:
785 // lr: return address
786 // rmethod: Method*
787 // rlocals: pointer to locals
788 // rcpool: cp cache
789 // stack_pointer: previous sp
790 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
791 // initialize fixed part of activation frame
792 if (native_call) {
793 __ sub(esp, sp, 14 * wordSize);
794 __ mov(rbcp, zr);
795 __ stp(esp, zr, Address(__ pre(sp, -14 * wordSize)));
796 // add 2 zero-initialized slots for native calls
797 __ stp(zr, zr, Address(sp, 12 * wordSize));
798 } else {
799 __ sub(esp, sp, 12 * wordSize);
800 __ ldr(rscratch1, Address(rmethod, Method::const_offset())); // get ConstMethod
801 __ add(rbcp, rscratch1, in_bytes(ConstMethod::codes_offset())); // get codebase
802 __ stp(esp, rbcp, Address(__ pre(sp, -12 * wordSize)));
803 }
804
805 if (ProfileInterpreter) {
806 Label method_data_continue;
807 __ ldr(rscratch1, Address(rmethod, Method::method_data_offset()));
808 __ cbz(rscratch1, method_data_continue);
809 __ lea(rscratch1, Address(rscratch1, in_bytes(MethodData::data_offset())));
810 __ bind(method_data_continue);
811 __ stp(rscratch1, rmethod, Address(sp, 6 * wordSize)); // save Method* and mdp (method data pointer)
812 } else {
813 __ stp(zr, rmethod, Address(sp, 6 * wordSize)); // save Method* (no mdp)
814 }
815
816 // Get mirror and store it in the frame as GC root for this Method*
817 __ load_mirror(rscratch1, rmethod);
818 __ stp(rscratch1, zr, Address(sp, 4 * wordSize));
819
820 __ ldr(rcpool, Address(rmethod, Method::const_offset()));
821 __ ldr(rcpool, Address(rcpool, ConstMethod::constants_offset()));
822 __ ldr(rcpool, Address(rcpool, ConstantPool::cache_offset_in_bytes()));
823 __ stp(rlocals, rcpool, Address(sp, 2 * wordSize));
824
825 __ stp(rfp, lr, Address(sp, 10 * wordSize));
826 __ lea(rfp, Address(sp, 10 * wordSize));
827
828 // set sender sp
829 // leave last_sp as null
830 __ stp(zr, r13, Address(sp, 8 * wordSize));
831
832 // Move SP out of the way
833 if (! native_call) {
834 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
835 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
836 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
837 __ sub(rscratch1, sp, rscratch1, ext::uxtw, 3);
838 __ andr(sp, rscratch1, -16);
839 }
840 }
841
842 // End of helpers
843
844 // Various method entries
845 //------------------------------------------------------------------------------------------------------------------------
846 //
847 //
848
849 // Method entry for java.lang.ref.Reference.get.
850 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
851 #if INCLUDE_ALL_GCS
852 // Code: _aload_0, _getfield, _areturn
853 // parameter size = 1
854 //
855 // The code that gets generated by this routine is split into 2 parts:
856 // 1. The "intrinsified" code for G1 (or any SATB based GC),
857 // 2. The slow path - which is an expansion of the regular method entry.
858 //
859 // Notes:-
860 // * In the G1 code we do not check whether we need to block for
861 // a safepoint. If G1 is enabled then we must execute the specialized
862 // code for Reference.get (except when the Reference object is null)
863 // so that we can log the value in the referent field with an SATB
864 // update buffer.
865 // If the code for the getfield template is modified so that the
866 // G1 pre-barrier code is executed when the current method is
867 // Reference.get() then going through the normal method entry
868 // will be fine.
869 // * The G1 code can, however, check the receiver object (the instance
870 // of java.lang.Reference) and jump to the slow path if null. If the
871 // Reference object is null then we obviously cannot fetch the referent
872 // and so we don't need to call the G1 pre-barrier. Thus we can use the
873 // regular method entry code to generate the NPE.
874 //
875 // This code is based on generate_accessor_enty.
876 //
877 // rmethod: Method*
878 // r13: senderSP must preserve for slow path, set SP to it on fast path
879
880 address entry = __ pc();
881
882 const int referent_offset = java_lang_ref_Reference::referent_offset;
883 guarantee(referent_offset > 0, "referent offset not initialized");
884
885 if (UseG1GC) {
886 Label slow_path;
887 const Register local_0 = c_rarg0;
888 // Check if local 0 != NULL
889 // If the receiver is null then it is OK to jump to the slow path.
890 __ ldr(local_0, Address(esp, 0));
891 __ cbz(local_0, slow_path);
892
893
894 // Load the value of the referent field.
895 const Address field_address(local_0, referent_offset);
896 __ load_heap_oop(local_0, field_address);
897
898 // Generate the G1 pre-barrier code to log the value of
899 // the referent field in an SATB buffer.
900 __ enter(); // g1_write may call runtime
901 __ g1_write_barrier_pre(noreg /* obj */,
902 local_0 /* pre_val */,
903 rthread /* thread */,
904 rscratch2 /* tmp */,
905 true /* tosca_live */,
906 true /* expand_call */);
907 __ leave();
908 // areturn
909 __ andr(sp, r13, -16); // done with stack
910 __ ret(lr);
911
912 // generate a vanilla interpreter entry as the slow path
913 __ bind(slow_path);
914 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
915 return entry;
916 }
917 #endif // INCLUDE_ALL_GCS
918
919 // If G1 is not enabled then attempt to go through the accessor entry point
920 // Reference.get is an accessor
921 return NULL;
922 }
923
924 /**
925 * Method entry for static native methods:
926 * int java.util.zip.CRC32.update(int crc, int b)
927 */
928 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
929 if (UseCRC32Intrinsics) {
930 address entry = __ pc();
931
932 // rmethod: Method*
933 // r13: senderSP must preserved for slow path
934 // esp: args
935
936 Label slow_path;
937 // If we need a safepoint check, generate full interpreter entry.
938 ExternalAddress state(SafepointSynchronize::address_of_state());
939 unsigned long offset;
940 __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset);
941 __ ldrw(rscratch1, Address(rscratch1, offset));
942 assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code");
943 __ cbnz(rscratch1, slow_path);
944
945 // We don't generate local frame and don't align stack because
946 // we call stub code and there is no safepoint on this path.
947
948 // Load parameters
949 const Register crc = c_rarg0; // crc
950 const Register val = c_rarg1; // source java byte value
951 const Register tbl = c_rarg2; // scratch
952
953 // Arguments are reversed on java expression stack
954 __ ldrw(val, Address(esp, 0)); // byte value
955 __ ldrw(crc, Address(esp, wordSize)); // Initial CRC
956
957 __ adrp(tbl, ExternalAddress(StubRoutines::crc_table_addr()), offset);
958 __ add(tbl, tbl, offset);
959
960 __ ornw(crc, zr, crc); // ~crc
961 __ update_byte_crc32(crc, val, tbl);
962 __ ornw(crc, zr, crc); // ~crc
963
964 // result in c_rarg0
965
966 __ andr(sp, r13, -16);
967 __ ret(lr);
968
969 // generate a vanilla native entry as the slow path
970 __ bind(slow_path);
971 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
972 return entry;
973 }
974 return NULL;
975 }
976
977 /**
978 * Method entry for static native methods:
979 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
980 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
981 */
982 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
983 if (UseCRC32Intrinsics) {
984 address entry = __ pc();
985
986 // rmethod,: Method*
987 // r13: senderSP must preserved for slow path
988
989 Label slow_path;
990 // If we need a safepoint check, generate full interpreter entry.
991 ExternalAddress state(SafepointSynchronize::address_of_state());
992 unsigned long offset;
993 __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset);
994 __ ldrw(rscratch1, Address(rscratch1, offset));
995 assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code");
996 __ cbnz(rscratch1, slow_path);
997
998 // We don't generate local frame and don't align stack because
999 // we call stub code and there is no safepoint on this path.
1000
1001 // Load parameters
1002 const Register crc = c_rarg0; // crc
1003 const Register buf = c_rarg1; // source java byte array address
1004 const Register len = c_rarg2; // length
1005 const Register off = len; // offset (never overlaps with 'len')
1006
1007 // Arguments are reversed on java expression stack
1008 // Calculate address of start element
1009 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
1010 __ ldr(buf, Address(esp, 2*wordSize)); // long buf
1011 __ ldrw(off, Address(esp, wordSize)); // offset
1012 __ add(buf, buf, off); // + offset
1013 __ ldrw(crc, Address(esp, 4*wordSize)); // Initial CRC
1014 } else {
1015 __ ldr(buf, Address(esp, 2*wordSize)); // byte[] array
1016 __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
1017 __ ldrw(off, Address(esp, wordSize)); // offset
1018 __ add(buf, buf, off); // + offset
1019 __ ldrw(crc, Address(esp, 3*wordSize)); // Initial CRC
1020 }
1021 // Can now load 'len' since we're finished with 'off'
1022 __ ldrw(len, Address(esp, 0x0)); // Length
1023
1024 __ andr(sp, r13, -16); // Restore the caller's SP
1025
1026 // We are frameless so we can just jump to the stub.
1027 __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()));
1028
1029 // generate a vanilla native entry as the slow path
1030 __ bind(slow_path);
1031 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
1032 return entry;
1033 }
1034 return NULL;
1035 }
1036
1037 // Not supported
1038 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
1039 return NULL;
1040 }
1041
1042 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
1043 // Bang each page in the shadow zone. We can't assume it's been done for
1044 // an interpreter frame with greater than a page of locals, so each page
1045 // needs to be checked. Only true for non-native.
1046 if (UseStackBanging) {
1047 const int n_shadow_pages = JavaThread::stack_shadow_zone_size() / os::vm_page_size();
1048 const int start_page = native_call ? n_shadow_pages : 1;
1049 const int page_size = os::vm_page_size();
1050 for (int pages = start_page; pages <= n_shadow_pages ; pages++) {
1051 __ sub(rscratch2, sp, pages*page_size);
1052 __ str(zr, Address(rscratch2));
1053 }
1054 }
1055 }
1056
1057
1058 // Interpreter stub for calling a native method. (asm interpreter)
1059 // This sets up a somewhat different looking stack for calling the
1060 // native method than the typical interpreter frame setup.
1061 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
1062 // determine code generation flags
1063 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1064
1065 // r1: Method*
1066 // rscratch1: sender sp
1067
1068 address entry_point = __ pc();
1069
1070 const Address constMethod (rmethod, Method::const_offset());
1071 const Address access_flags (rmethod, Method::access_flags_offset());
1072 const Address size_of_parameters(r2, ConstMethod::
1073 size_of_parameters_offset());
1074
1075 // get parameter size (always needed)
1076 __ ldr(r2, constMethod);
1077 __ load_unsigned_short(r2, size_of_parameters);
1078
1079 // Native calls don't need the stack size check since they have no
1080 // expression stack and the arguments are already on the stack and
1081 // we only add a handful of words to the stack.
1082
1083 // rmethod: Method*
1084 // r2: size of parameters
1085 // rscratch1: sender sp
1086
1087 // for natives the size of locals is zero
1088
1089 // compute beginning of parameters (rlocals)
1090 __ add(rlocals, esp, r2, ext::uxtx, 3);
1091 __ add(rlocals, rlocals, -wordSize);
1092
1093 // Pull SP back to minimum size: this avoids holes in the stack
1094 __ andr(sp, esp, -16);
1095
1096 // initialize fixed part of activation frame
1097 generate_fixed_frame(true);
1098 #ifndef PRODUCT
1099 // tell the simulator that a method has been entered
1100 if (NotifySimulator) {
1101 __ notify(Assembler::method_entry);
1102 }
1103 #endif
1104
1105 // make sure method is native & not abstract
1106 #ifdef ASSERT
1107 __ ldrw(r0, access_flags);
1108 {
1109 Label L;
1110 __ tst(r0, JVM_ACC_NATIVE);
1111 __ br(Assembler::NE, L);
1112 __ stop("tried to execute non-native method as native");
1113 __ bind(L);
1114 }
1115 {
1116 Label L;
1117 __ tst(r0, JVM_ACC_ABSTRACT);
1118 __ br(Assembler::EQ, L);
1119 __ stop("tried to execute abstract method in interpreter");
1120 __ bind(L);
1121 }
1122 #endif
1123
1124 // Since at this point in the method invocation the exception
1125 // handler would try to exit the monitor of synchronized methods
1126 // which hasn't been entered yet, we set the thread local variable
1127 // _do_not_unlock_if_synchronized to true. The remove_activation
1128 // will check this flag.
1129
1130 const Address do_not_unlock_if_synchronized(rthread,
1131 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1132 __ mov(rscratch2, true);
1133 __ strb(rscratch2, do_not_unlock_if_synchronized);
1134
1135 // increment invocation count & check for overflow
1136 Label invocation_counter_overflow;
1137 if (inc_counter) {
1138 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1139 }
1140
1141 Label continue_after_compile;
1142 __ bind(continue_after_compile);
1143
1144 bang_stack_shadow_pages(true);
1145
1146 // reset the _do_not_unlock_if_synchronized flag
1147 __ strb(zr, do_not_unlock_if_synchronized);
1148
1149 // check for synchronized methods
1150 // Must happen AFTER invocation_counter check and stack overflow check,
1151 // so method is not locked if overflows.
1152 if (synchronized) {
1153 lock_method();
1154 } else {
1155 // no synchronization necessary
1156 #ifdef ASSERT
1157 {
1158 Label L;
1159 __ ldrw(r0, access_flags);
1160 __ tst(r0, JVM_ACC_SYNCHRONIZED);
1161 __ br(Assembler::EQ, L);
1162 __ stop("method needs synchronization");
1163 __ bind(L);
1164 }
1165 #endif
1166 }
1167
1168 // start execution
1169 #ifdef ASSERT
1170 {
1171 Label L;
1172 const Address monitor_block_top(rfp,
1173 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1174 __ ldr(rscratch1, monitor_block_top);
1175 __ cmp(esp, rscratch1);
1176 __ br(Assembler::EQ, L);
1177 __ stop("broken stack frame setup in interpreter");
1178 __ bind(L);
1179 }
1180 #endif
1181
1182 // jvmti support
1183 __ notify_method_entry();
1184
1185 // work registers
1186 const Register t = r17;
1187 const Register result_handler = r19;
1188
1189 // allocate space for parameters
1190 __ ldr(t, Address(rmethod, Method::const_offset()));
1191 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1192
1193 __ sub(rscratch1, esp, t, ext::uxtx, Interpreter::logStackElementSize);
1194 __ andr(sp, rscratch1, -16);
1195 __ mov(esp, rscratch1);
1196
1197 // get signature handler
1198 {
1199 Label L;
1200 __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
1201 __ cbnz(t, L);
1202 __ call_VM(noreg,
1203 CAST_FROM_FN_PTR(address,
1204 InterpreterRuntime::prepare_native_call),
1205 rmethod);
1206 __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
1207 __ bind(L);
1208 }
1209
1210 // call signature handler
1211 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
1212 "adjust this code");
1213 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == sp,
1214 "adjust this code");
1215 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
1216 "adjust this code");
1217
1218 // The generated handlers do not touch rmethod (the method).
1219 // However, large signatures cannot be cached and are generated
1220 // each time here. The slow-path generator can do a GC on return,
1221 // so we must reload it after the call.
1222 __ blr(t);
1223 __ get_method(rmethod); // slow path can do a GC, reload rmethod
1224
1225
1226 // result handler is in r0
1227 // set result handler
1228 __ mov(result_handler, r0);
1229 // pass mirror handle if static call
1230 {
1231 Label L;
1232 __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
1233 __ tbz(t, exact_log2(JVM_ACC_STATIC), L);
1234 // get mirror
1235 __ load_mirror(t, rmethod);
1236 // copy mirror into activation frame
1237 __ str(t, Address(rfp, frame::interpreter_frame_oop_temp_offset * wordSize));
1238 // pass handle to mirror
1239 __ add(c_rarg1, rfp, frame::interpreter_frame_oop_temp_offset * wordSize);
1240 __ bind(L);
1241 }
1242
1243 // get native function entry point in r10
1244 {
1245 Label L;
1246 __ ldr(r10, Address(rmethod, Method::native_function_offset()));
1247 address unsatisfied = (SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1248 __ mov(rscratch2, unsatisfied);
1249 __ ldr(rscratch2, rscratch2);
1250 __ cmp(r10, rscratch2);
1251 __ br(Assembler::NE, L);
1252 __ call_VM(noreg,
1253 CAST_FROM_FN_PTR(address,
1254 InterpreterRuntime::prepare_native_call),
1255 rmethod);
1256 __ get_method(rmethod);
1257 __ ldr(r10, Address(rmethod, Method::native_function_offset()));
1258 __ bind(L);
1259 }
1260
1261 // pass JNIEnv
1262 __ add(c_rarg0, rthread, in_bytes(JavaThread::jni_environment_offset()));
1263
1264 // It is enough that the pc() points into the right code
1265 // segment. It does not have to be the correct return pc.
1266 __ set_last_Java_frame(esp, rfp, (address)NULL, rscratch1);
1267
1268 // change thread state
1269 #ifdef ASSERT
1270 {
1271 Label L;
1272 __ ldrw(t, Address(rthread, JavaThread::thread_state_offset()));
1273 __ cmp(t, _thread_in_Java);
1274 __ br(Assembler::EQ, L);
1275 __ stop("Wrong thread state in native stub");
1276 __ bind(L);
1277 }
1278 #endif
1279
1280 // Change state to native
1281 __ mov(rscratch1, _thread_in_native);
1282 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1283 __ stlrw(rscratch1, rscratch2);
1284
1285 // Call the native method.
1286 __ blrt(r10, rscratch1);
1287 __ maybe_isb();
1288 __ get_method(rmethod);
1289 // result potentially in r0 or v0
1290
1291 // make room for the pushes we're about to do
1292 __ sub(rscratch1, esp, 4 * wordSize);
1293 __ andr(sp, rscratch1, -16);
1294
1295 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1296 // in order to extract the result of a method call. If the order of these
1297 // pushes change or anything else is added to the stack then the code in
1298 // interpreter_frame_result must also change.
1299 __ push(dtos);
1300 __ push(ltos);
1301
1302 // change thread state
1303 __ mov(rscratch1, _thread_in_native_trans);
1304 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1305 __ stlrw(rscratch1, rscratch2);
1306
1307 if (os::is_MP()) {
1308 if (UseMembar) {
1309 // Force this write out before the read below
1310 __ dsb(Assembler::SY);
1311 } else {
1312 // Write serialization page so VM thread can do a pseudo remote membar.
1313 // We use the current thread pointer to calculate a thread specific
1314 // offset to write to within the page. This minimizes bus traffic
1315 // due to cache line collision.
1316 __ serialize_memory(rthread, rscratch2);
1317 }
1318 }
1319
1320 // check for safepoint operation in progress and/or pending suspend requests
1321 {
1322 Label Continue;
1323 {
1324 unsigned long offset;
1325 __ adrp(rscratch2, SafepointSynchronize::address_of_state(), offset);
1326 __ ldrw(rscratch2, Address(rscratch2, offset));
1327 }
1328 assert(SafepointSynchronize::_not_synchronized == 0,
1329 "SafepointSynchronize::_not_synchronized");
1330 Label L;
1331 __ cbnz(rscratch2, L);
1332 __ ldrw(rscratch2, Address(rthread, JavaThread::suspend_flags_offset()));
1333 __ cbz(rscratch2, Continue);
1334 __ bind(L);
1335
1336 // Don't use call_VM as it will see a possible pending exception
1337 // and forward it and never return here preventing us from
1338 // clearing _last_native_pc down below. So we do a runtime call by
1339 // hand.
1340 //
1341 __ mov(c_rarg0, rthread);
1342 __ mov(rscratch2, CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
1343 __ blrt(rscratch2, 1, 0, 0);
1344 __ maybe_isb();
1345 __ get_method(rmethod);
1346 __ reinit_heapbase();
1347 __ bind(Continue);
1348 }
1349
1350 // change thread state
1351 __ mov(rscratch1, _thread_in_Java);
1352 __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
1353 __ stlrw(rscratch1, rscratch2);
1354
1355 // reset_last_Java_frame
1356 __ reset_last_Java_frame(true);
1357
1358 if (CheckJNICalls) {
1359 // clear_pending_jni_exception_check
1360 __ str(zr, Address(rthread, JavaThread::pending_jni_exception_check_fn_offset()));
1361 }
1362
1363 // reset handle block
1364 __ ldr(t, Address(rthread, JavaThread::active_handles_offset()));
1365 __ str(zr, Address(t, JNIHandleBlock::top_offset_in_bytes()));
1366
1367 // If result is an oop unbox and store it in frame where gc will see it
1368 // and result handler will pick it up
1369
1370 {
1371 Label no_oop, store_result;
1372 __ adr(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1373 __ cmp(t, result_handler);
1374 __ br(Assembler::NE, no_oop);
1375 // retrieve result
1376 __ pop(ltos);
1377 __ cbz(r0, store_result);
1378 __ ldr(r0, Address(r0, 0));
1379 __ bind(store_result);
1380 __ str(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
1381 // keep stack depth as expected by pushing oop which will eventually be discarded
1382 __ push(ltos);
1383 __ bind(no_oop);
1384 }
1385
1386 {
1387 Label no_reguard;
1388 __ lea(rscratch1, Address(rthread, in_bytes(JavaThread::stack_guard_state_offset())));
1389 __ ldrw(rscratch1, Address(rscratch1));
1390 __ cmp(rscratch1, JavaThread::stack_guard_yellow_reserved_disabled);
1391 __ br(Assembler::NE, no_reguard);
1392
1393 __ pusha(); // XXX only save smashed registers
1394 __ mov(c_rarg0, rthread);
1395 __ mov(rscratch2, CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages));
1396 __ blrt(rscratch2, 0, 0, 0);
1397 __ popa(); // XXX only restore smashed registers
1398 __ bind(no_reguard);
1399 }
1400
1401 // The method register is junk from after the thread_in_native transition
1402 // until here. Also can't call_VM until the bcp has been
1403 // restored. Need bcp for throwing exception below so get it now.
1404 __ get_method(rmethod);
1405
1406 // restore bcp to have legal interpreter frame, i.e., bci == 0 <=>
1407 // rbcp == code_base()
1408 __ ldr(rbcp, Address(rmethod, Method::const_offset())); // get ConstMethod*
1409 __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); // get codebase
1410 // handle exceptions (exception handling will handle unlocking!)
1411 {
1412 Label L;
1413 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
1414 __ cbz(rscratch1, L);
1415 // Note: At some point we may want to unify this with the code
1416 // used in call_VM_base(); i.e., we should use the
1417 // StubRoutines::forward_exception code. For now this doesn't work
1418 // here because the rsp is not correctly set at this point.
1419 __ MacroAssembler::call_VM(noreg,
1420 CAST_FROM_FN_PTR(address,
1421 InterpreterRuntime::throw_pending_exception));
1422 __ should_not_reach_here();
1423 __ bind(L);
1424 }
1425
1426 // do unlocking if necessary
1427 {
1428 Label L;
1429 __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
1430 __ tbz(t, exact_log2(JVM_ACC_SYNCHRONIZED), L);
1431 // the code below should be shared with interpreter macro
1432 // assembler implementation
1433 {
1434 Label unlock;
1435 // BasicObjectLock will be first in list, since this is a
1436 // synchronized method. However, need to check that the object
1437 // has not been unlocked by an explicit monitorexit bytecode.
1438
1439 // monitor expect in c_rarg1 for slow unlock path
1440 __ lea (c_rarg1, Address(rfp, // address of first monitor
1441 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1442 wordSize - sizeof(BasicObjectLock))));
1443
1444 __ ldr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
1445 __ cbnz(t, unlock);
1446
1447 // Entry already unlocked, need to throw exception
1448 __ MacroAssembler::call_VM(noreg,
1449 CAST_FROM_FN_PTR(address,
1450 InterpreterRuntime::throw_illegal_monitor_state_exception));
1451 __ should_not_reach_here();
1452
1453 __ bind(unlock);
1454 __ unlock_object(c_rarg1);
1455 }
1456 __ bind(L);
1457 }
1458
1459 // jvmti support
1460 // Note: This must happen _after_ handling/throwing any exceptions since
1461 // the exception handler code notifies the runtime of method exits
1462 // too. If this happens before, method entry/exit notifications are
1463 // not properly paired (was bug - gri 11/22/99).
1464 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1465
1466 // restore potential result in r0:d0, call result handler to
1467 // restore potential result in ST0 & handle result
1468
1469 __ pop(ltos);
1470 __ pop(dtos);
1471
1472 __ blr(result_handler);
1473
1474 // remove activation
1475 __ ldr(esp, Address(rfp,
1476 frame::interpreter_frame_sender_sp_offset *
1477 wordSize)); // get sender sp
1478 // remove frame anchor
1479 __ leave();
1480
1481 // resture sender sp
1482 __ mov(sp, esp);
1483
1484 __ ret(lr);
1485
1486 if (inc_counter) {
1487 // Handle overflow of counter and compile method
1488 __ bind(invocation_counter_overflow);
1489 generate_counter_overflow(continue_after_compile);
1490 }
1491
1492 return entry_point;
1493 }
1494
1495 //
1496 // Generic interpreted method entry to (asm) interpreter
1497 //
1498 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1499 // determine code generation flags
1500 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1501
1502 // rscratch1: sender sp
1503 address entry_point = __ pc();
1504
1505 const Address constMethod(rmethod, Method::const_offset());
1506 const Address access_flags(rmethod, Method::access_flags_offset());
1507 const Address size_of_parameters(r3,
1508 ConstMethod::size_of_parameters_offset());
1509 const Address size_of_locals(r3, ConstMethod::size_of_locals_offset());
1510
1511 // get parameter size (always needed)
1512 // need to load the const method first
1513 __ ldr(r3, constMethod);
1514 __ load_unsigned_short(r2, size_of_parameters);
1515
1516 // r2: size of parameters
1517
1518 __ load_unsigned_short(r3, size_of_locals); // get size of locals in words
1519 __ sub(r3, r3, r2); // r3 = no. of additional locals
1520
1521 // see if we've got enough room on the stack for locals plus overhead.
1522 generate_stack_overflow_check();
1523
1524 // compute beginning of parameters (rlocals)
1525 __ add(rlocals, esp, r2, ext::uxtx, 3);
1526 __ sub(rlocals, rlocals, wordSize);
1527
1528 // Make room for locals
1529 __ sub(rscratch1, esp, r3, ext::uxtx, 3);
1530 __ andr(sp, rscratch1, -16);
1531
1532 // r3 - # of additional locals
1533 // allocate space for locals
1534 // explicitly initialize locals
1535 {
1536 Label exit, loop;
1537 __ ands(zr, r3, r3);
1538 __ br(Assembler::LE, exit); // do nothing if r3 <= 0
1539 __ bind(loop);
1540 __ str(zr, Address(__ post(rscratch1, wordSize)));
1541 __ sub(r3, r3, 1); // until everything initialized
1542 __ cbnz(r3, loop);
1543 __ bind(exit);
1544 }
1545
1546 // And the base dispatch table
1547 __ get_dispatch();
1548
1549 // initialize fixed part of activation frame
1550 generate_fixed_frame(false);
1551 #ifndef PRODUCT
1552 // tell the simulator that a method has been entered
1553 if (NotifySimulator) {
1554 __ notify(Assembler::method_entry);
1555 }
1556 #endif
1557 // make sure method is not native & not abstract
1558 #ifdef ASSERT
1559 __ ldrw(r0, access_flags);
1560 {
1561 Label L;
1562 __ tst(r0, JVM_ACC_NATIVE);
1563 __ br(Assembler::EQ, L);
1564 __ stop("tried to execute native method as non-native");
1565 __ bind(L);
1566 }
1567 {
1568 Label L;
1569 __ tst(r0, JVM_ACC_ABSTRACT);
1570 __ br(Assembler::EQ, L);
1571 __ stop("tried to execute abstract method in interpreter");
1572 __ bind(L);
1573 }
1574 #endif
1575
1576 // Since at this point in the method invocation the exception
1577 // handler would try to exit the monitor of synchronized methods
1578 // which hasn't been entered yet, we set the thread local variable
1579 // _do_not_unlock_if_synchronized to true. The remove_activation
1580 // will check this flag.
1581
1582 const Address do_not_unlock_if_synchronized(rthread,
1583 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1584 __ mov(rscratch2, true);
1585 __ strb(rscratch2, do_not_unlock_if_synchronized);
1586
1587 // increment invocation count & check for overflow
1588 Label invocation_counter_overflow;
1589 Label profile_method;
1590 Label profile_method_continue;
1591 if (inc_counter) {
1592 generate_counter_incr(&invocation_counter_overflow,
1593 &profile_method,
1594 &profile_method_continue);
1595 if (ProfileInterpreter) {
1596 __ bind(profile_method_continue);
1597 }
1598 }
1599
1600 Label continue_after_compile;
1601 __ bind(continue_after_compile);
1602
1603 bang_stack_shadow_pages(false);
1604
1605 // reset the _do_not_unlock_if_synchronized flag
1606 __ strb(zr, do_not_unlock_if_synchronized);
1607
1608 // check for synchronized methods
1609 // Must happen AFTER invocation_counter check and stack overflow check,
1610 // so method is not locked if overflows.
1611 if (synchronized) {
1612 // Allocate monitor and lock method
1613 lock_method();
1614 } else {
1615 // no synchronization necessary
1616 #ifdef ASSERT
1617 {
1618 Label L;
1619 __ ldrw(r0, access_flags);
1620 __ tst(r0, JVM_ACC_SYNCHRONIZED);
1621 __ br(Assembler::EQ, L);
1622 __ stop("method needs synchronization");
1623 __ bind(L);
1624 }
1625 #endif
1626 }
1627
1628 // start execution
1629 #ifdef ASSERT
1630 {
1631 Label L;
1632 const Address monitor_block_top (rfp,
1633 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1634 __ ldr(rscratch1, monitor_block_top);
1635 __ cmp(esp, rscratch1);
1636 __ br(Assembler::EQ, L);
1637 __ stop("broken stack frame setup in interpreter");
1638 __ bind(L);
1639 }
1640 #endif
1641
1642 // jvmti support
1643 __ notify_method_entry();
1644
1645 __ dispatch_next(vtos);
1646
1647 // invocation counter overflow
1648 if (inc_counter) {
1649 if (ProfileInterpreter) {
1650 // We have decided to profile this method in the interpreter
1651 __ bind(profile_method);
1652 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1653 __ set_method_data_pointer_for_bcp();
1654 // don't think we need this
1655 __ get_method(r1);
1656 __ b(profile_method_continue);
1657 }
1658 // Handle overflow of counter and compile method
1659 __ bind(invocation_counter_overflow);
1660 generate_counter_overflow(continue_after_compile);
1661 }
1662
1663 return entry_point;
1664 }
1665
1666 //-----------------------------------------------------------------------------
1667 // Exceptions
1668
1669 void TemplateInterpreterGenerator::generate_throw_exception() {
1670 // Entry point in previous activation (i.e., if the caller was
1671 // interpreted)
1672 Interpreter::_rethrow_exception_entry = __ pc();
1673 // Restore sp to interpreter_frame_last_sp even though we are going
1674 // to empty the expression stack for the exception processing.
1675 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1676 // r0: exception
1677 // r3: return address/pc that threw exception
1678 __ restore_bcp(); // rbcp points to call/send
1679 __ restore_locals();
1680 __ restore_constant_pool_cache();
1681 __ reinit_heapbase(); // restore rheapbase as heapbase.
1682 __ get_dispatch();
1683
1684 #ifndef PRODUCT
1685 // tell the simulator that the caller method has been reentered
1686 if (NotifySimulator) {
1687 __ get_method(rmethod);
1688 __ notify(Assembler::method_reentry);
1689 }
1690 #endif
1691 // Entry point for exceptions thrown within interpreter code
1692 Interpreter::_throw_exception_entry = __ pc();
1693 // If we came here via a NullPointerException on the receiver of a
1694 // method, rmethod may be corrupt.
1695 __ get_method(rmethod);
1696 // expression stack is undefined here
1697 // r0: exception
1698 // rbcp: exception bcp
1699 __ verify_oop(r0);
1700 __ mov(c_rarg1, r0);
1701
1702 // expression stack must be empty before entering the VM in case of
1703 // an exception
1704 __ empty_expression_stack();
1705 // find exception handler address and preserve exception oop
1706 __ call_VM(r3,
1707 CAST_FROM_FN_PTR(address,
1708 InterpreterRuntime::exception_handler_for_exception),
1709 c_rarg1);
1710
1711 // Calculate stack limit
1712 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
1713 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
1714 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
1715 __ ldr(rscratch2,
1716 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
1717 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
1718 __ andr(sp, rscratch1, -16);
1719
1720 // r0: exception handler entry point
1721 // r3: preserved exception oop
1722 // rbcp: bcp for exception handler
1723 __ push_ptr(r3); // push exception which is now the only value on the stack
1724 __ br(r0); // jump to exception handler (may be _remove_activation_entry!)
1725
1726 // If the exception is not handled in the current frame the frame is
1727 // removed and the exception is rethrown (i.e. exception
1728 // continuation is _rethrow_exception).
1729 //
1730 // Note: At this point the bci is still the bxi for the instruction
1731 // which caused the exception and the expression stack is
1732 // empty. Thus, for any VM calls at this point, GC will find a legal
1733 // oop map (with empty expression stack).
1734
1735 //
1736 // JVMTI PopFrame support
1737 //
1738
1739 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1740 __ empty_expression_stack();
1741 // Set the popframe_processing bit in pending_popframe_condition
1742 // indicating that we are currently handling popframe, so that
1743 // call_VMs that may happen later do not trigger new popframe
1744 // handling cycles.
1745 __ ldrw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
1746 __ orr(r3, r3, JavaThread::popframe_processing_bit);
1747 __ strw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
1748
1749 {
1750 // Check to see whether we are returning to a deoptimized frame.
1751 // (The PopFrame call ensures that the caller of the popped frame is
1752 // either interpreted or compiled and deoptimizes it if compiled.)
1753 // In this case, we can't call dispatch_next() after the frame is
1754 // popped, but instead must save the incoming arguments and restore
1755 // them after deoptimization has occurred.
1756 //
1757 // Note that we don't compare the return PC against the
1758 // deoptimization blob's unpack entry because of the presence of
1759 // adapter frames in C2.
1760 Label caller_not_deoptimized;
1761 __ ldr(c_rarg1, Address(rfp, frame::return_addr_offset * wordSize));
1762 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1763 InterpreterRuntime::interpreter_contains), c_rarg1);
1764 __ cbnz(r0, caller_not_deoptimized);
1765
1766 // Compute size of arguments for saving when returning to
1767 // deoptimized caller
1768 __ get_method(r0);
1769 __ ldr(r0, Address(r0, Method::const_offset()));
1770 __ load_unsigned_short(r0, Address(r0, in_bytes(ConstMethod::
1771 size_of_parameters_offset())));
1772 __ lsl(r0, r0, Interpreter::logStackElementSize);
1773 __ restore_locals(); // XXX do we need this?
1774 __ sub(rlocals, rlocals, r0);
1775 __ add(rlocals, rlocals, wordSize);
1776 // Save these arguments
1777 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1778 Deoptimization::
1779 popframe_preserve_args),
1780 rthread, r0, rlocals);
1781
1782 __ remove_activation(vtos,
1783 /* throw_monitor_exception */ false,
1784 /* install_monitor_exception */ false,
1785 /* notify_jvmdi */ false);
1786
1787 // Inform deoptimization that it is responsible for restoring
1788 // these arguments
1789 __ mov(rscratch1, JavaThread::popframe_force_deopt_reexecution_bit);
1790 __ strw(rscratch1, Address(rthread, JavaThread::popframe_condition_offset()));
1791
1792 // Continue in deoptimization handler
1793 __ ret(lr);
1794
1795 __ bind(caller_not_deoptimized);
1796 }
1797
1798 __ remove_activation(vtos,
1799 /* throw_monitor_exception */ false,
1800 /* install_monitor_exception */ false,
1801 /* notify_jvmdi */ false);
1802
1803 // Restore the last_sp and null it out
1804 __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1805 __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
1806
1807 __ restore_bcp();
1808 __ restore_locals();
1809 __ restore_constant_pool_cache();
1810 __ get_method(rmethod);
1811
1812 // The method data pointer was incremented already during
1813 // call profiling. We have to restore the mdp for the current bcp.
1814 if (ProfileInterpreter) {
1815 __ set_method_data_pointer_for_bcp();
1816 }
1817
1818 // Clear the popframe condition flag
1819 __ strw(zr, Address(rthread, JavaThread::popframe_condition_offset()));
1820 assert(JavaThread::popframe_inactive == 0, "fix popframe_inactive");
1821
1822 #if INCLUDE_JVMTI
1823 {
1824 Label L_done;
1825
1826 __ ldrb(rscratch1, Address(rbcp, 0));
1827 __ cmpw(r1, Bytecodes::_invokestatic);
1828 __ br(Assembler::EQ, L_done);
1829
1830 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1831 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1832
1833 __ ldr(c_rarg0, Address(rlocals, 0));
1834 __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), c_rarg0, rmethod, rbcp);
1835
1836 __ cbz(r0, L_done);
1837
1838 __ str(r0, Address(esp, 0));
1839 __ bind(L_done);
1840 }
1841 #endif // INCLUDE_JVMTI
1842
1843 // Restore machine SP
1844 __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
1845 __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
1846 __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
1847 __ ldr(rscratch2,
1848 Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
1849 __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
1850 __ andr(sp, rscratch1, -16);
1851
1852 __ dispatch_next(vtos);
1853 // end of PopFrame support
1854
1855 Interpreter::_remove_activation_entry = __ pc();
1856
1857 // preserve exception over this code sequence
1858 __ pop_ptr(r0);
1859 __ str(r0, Address(rthread, JavaThread::vm_result_offset()));
1860 // remove the activation (without doing throws on illegalMonitorExceptions)
1861 __ remove_activation(vtos, false, true, false);
1862 // restore exception
1863 // restore exception
1864 __ get_vm_result(r0, rthread);
1865
1866 // In between activations - previous activation type unknown yet
1867 // compute continuation point - the continuation point expects the
1868 // following registers set up:
1869 //
1870 // r0: exception
1871 // lr: return address/pc that threw exception
1872 // rsp: expression stack of caller
1873 // rfp: fp of caller
1874 // FIXME: There's no point saving LR here because VM calls don't trash it
1875 __ stp(r0, lr, Address(__ pre(sp, -2 * wordSize))); // save exception & return address
1876 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1877 SharedRuntime::exception_handler_for_return_address),
1878 rthread, lr);
1879 __ mov(r1, r0); // save exception handler
1880 __ ldp(r0, lr, Address(__ post(sp, 2 * wordSize))); // restore exception & return address
1881 // We might be returning to a deopt handler that expects r3 to
1882 // contain the exception pc
1883 __ mov(r3, lr);
1884 // Note that an "issuing PC" is actually the next PC after the call
1885 __ br(r1); // jump to exception
1886 // handler of caller
1887 }
1888
1889
1890 //
1891 // JVMTI ForceEarlyReturn support
1892 //
1893 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1894 address entry = __ pc();
1895
1896 __ restore_bcp();
1897 __ restore_locals();
1898 __ empty_expression_stack();
1899 __ load_earlyret_value(state);
1900
1901 __ ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset()));
1902 Address cond_addr(rscratch1, JvmtiThreadState::earlyret_state_offset());
1903
1904 // Clear the earlyret state
1905 assert(JvmtiThreadState::earlyret_inactive == 0, "should be");
1906 __ str(zr, cond_addr);
1907
1908 __ remove_activation(state,
1909 false, /* throw_monitor_exception */
1910 false, /* install_monitor_exception */
1911 true); /* notify_jvmdi */
1912 __ ret(lr);
1913
1914 return entry;
1915 } // end of ForceEarlyReturn support
1916
1917
1918
1919 //-----------------------------------------------------------------------------
1920 // Helper for vtos entry point generation
1921
1922 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1923 address& bep,
1924 address& cep,
1925 address& sep,
1926 address& aep,
1927 address& iep,
1928 address& lep,
1929 address& fep,
1930 address& dep,
1931 address& vep) {
1932 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1933 Label L;
1934 aep = __ pc(); __ push_ptr(); __ b(L);
1935 fep = __ pc(); __ push_f(); __ b(L);
1936 dep = __ pc(); __ push_d(); __ b(L);
1937 lep = __ pc(); __ push_l(); __ b(L);
1938 bep = cep = sep =
1939 iep = __ pc(); __ push_i();
1940 vep = __ pc();
1941 __ bind(L);
1942 generate_and_dispatch(t);
1943 }
1944
1945 //-----------------------------------------------------------------------------
1946
1947 // Non-product code
1948 #ifndef PRODUCT
1949 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1950 address entry = __ pc();
1951
1952 __ push(lr);
1953 __ push(state);
1954 __ push(RegSet::range(r0, r15), sp);
1955 __ mov(c_rarg2, r0); // Pass itos
1956 __ call_VM(noreg,
1957 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1958 c_rarg1, c_rarg2, c_rarg3);
1959 __ pop(RegSet::range(r0, r15), sp);
1960 __ pop(state);
1961 __ pop(lr);
1962 __ ret(lr); // return from result handler
1963
1964 return entry;
1965 }
1966
1967 void TemplateInterpreterGenerator::count_bytecode() {
1968 Register rscratch3 = r0;
1969 __ push(rscratch1);
1970 __ push(rscratch2);
1971 __ push(rscratch3);
1972 __ mov(rscratch3, (address) &BytecodeCounter::_counter_value);
1973 __ atomic_add(noreg, 1, rscratch3);
1974 __ pop(rscratch3);
1975 __ pop(rscratch2);
1976 __ pop(rscratch1);
1977 }
1978
1979 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { ; }
1980
1981 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { ; }
1982
1983
1984 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1985 // Call a little run-time stub to avoid blow-up for each bytecode.
1986 // The run-time runtime saves the right registers, depending on
1987 // the tosca in-state for the given template.
1988
1989 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1990 "entry must have been generated");
1991 __ bl(Interpreter::trace_code(t->tos_in()));
1992 __ reinit_heapbase();
1993 }
1994
1995
1996 void TemplateInterpreterGenerator::stop_interpreter_at() {
1997 Label L;
1998 __ push(rscratch1);
1999 __ mov(rscratch1, (address) &BytecodeCounter::_counter_value);
2000 __ ldr(rscratch1, Address(rscratch1));
2001 __ mov(rscratch2, StopInterpreterAt);
2002 __ cmpw(rscratch1, rscratch2);
2003 __ br(Assembler::NE, L);
2004 __ brk(0);
2005 __ bind(L);
2006 __ pop(rscratch1);
2007 }
2008
2009 #ifdef BUILTIN_SIM
2010
2011 #include <sys/mman.h>
2012 #include <unistd.h>
2013
2014 extern "C" {
2015 static int PAGESIZE = getpagesize();
2016 int is_mapped_address(u_int64_t address)
2017 {
2018 address = (address & ~((u_int64_t)PAGESIZE - 1));
2019 if (msync((void *)address, PAGESIZE, MS_ASYNC) == 0) {
2020 return true;
2021 }
2022 if (errno != ENOMEM) {
2023 return true;
2024 }
2025 return false;
2026 }
2027
2028 void bccheck1(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode)
2029 {
2030 if (method != 0) {
2031 method[0] = '\0';
2032 }
2033 if (bcidx != 0) {
2034 *bcidx = -2;
2035 }
2036 if (decode != 0) {
2037 decode[0] = 0;
2038 }
2039
2040 if (framesize != 0) {
2041 *framesize = -1;
2042 }
2043
2044 if (Interpreter::contains((address)pc)) {
2045 AArch64Simulator *sim = AArch64Simulator::get_current(UseSimulatorCache, DisableBCCheck);
2046 Method* meth;
2047 address bcp;
2048 if (fp) {
2049 #define FRAME_SLOT_METHOD 3
2050 #define FRAME_SLOT_BCP 7
2051 meth = (Method*)sim->getMemory()->loadU64(fp - (FRAME_SLOT_METHOD << 3));
2052 bcp = (address)sim->getMemory()->loadU64(fp - (FRAME_SLOT_BCP << 3));
2053 #undef FRAME_SLOT_METHOD
2054 #undef FRAME_SLOT_BCP
2055 } else {
2056 meth = (Method*)sim->getCPUState().xreg(RMETHOD, 0);
2057 bcp = (address)sim->getCPUState().xreg(RBCP, 0);
2058 }
2059 if (meth->is_native()) {
2060 return;
2061 }
2062 if(method && meth->is_method()) {
2063 ResourceMark rm;
2064 method[0] = 'I';
2065 method[1] = ' ';
2066 meth->name_and_sig_as_C_string(method + 2, 398);
2067 }
2068 if (bcidx) {
2069 if (meth->contains(bcp)) {
2070 *bcidx = meth->bci_from(bcp);
2071 } else {
2072 *bcidx = -2;
2073 }
2074 }
2075 if (decode) {
2076 if (!BytecodeTracer::closure()) {
2077 BytecodeTracer::set_closure(BytecodeTracer::std_closure());
2078 }
2079 stringStream str(decode, 400);
2080 BytecodeTracer::trace(meth, bcp, &str);
2081 }
2082 } else {
2083 if (method) {
2084 CodeBlob *cb = CodeCache::find_blob((address)pc);
2085 if (cb != NULL) {
2086 if (cb->is_nmethod()) {
2087 ResourceMark rm;
2088 nmethod* nm = (nmethod*)cb;
2089 method[0] = 'C';
2090 method[1] = ' ';
2091 nm->method()->name_and_sig_as_C_string(method + 2, 398);
2092 } else if (cb->is_adapter_blob()) {
2093 strcpy(method, "B adapter blob");
2094 } else if (cb->is_runtime_stub()) {
2095 strcpy(method, "B runtime stub");
2096 } else if (cb->is_exception_stub()) {
2097 strcpy(method, "B exception stub");
2098 } else if (cb->is_deoptimization_stub()) {
2099 strcpy(method, "B deoptimization stub");
2100 } else if (cb->is_safepoint_stub()) {
2101 strcpy(method, "B safepoint stub");
2102 } else if (cb->is_uncommon_trap_stub()) {
2103 strcpy(method, "B uncommon trap stub");
2104 } else if (cb->contains((address)StubRoutines::call_stub())) {
2105 strcpy(method, "B call stub");
2106 } else {
2107 strcpy(method, "B unknown blob : ");
2108 strcat(method, cb->name());
2109 }
2110 if (framesize != NULL) {
2111 *framesize = cb->frame_size();
2112 }
2113 }
2114 }
2115 }
2116 }
2117
2118
2119 JNIEXPORT void bccheck(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode)
2120 {
2121 bccheck1(pc, fp, method, bcidx, framesize, decode);
2122 }
2123 }
2124
2125 #endif // BUILTIN_SIM
2126 #endif // !PRODUCT