1 /*
2 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/assembler.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/interp_masm.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "interpreter/interpreterRuntime.hpp"
32 #include "interpreter/templateInterpreterGenerator.hpp"
33 #include "interpreter/templateTable.hpp"
34 #include "oops/arrayOop.hpp"
35 #include "oops/methodData.hpp"
36 #include "oops/method.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiThreadState.hpp"
40 #include "prims/methodHandles.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/deoptimization.hpp"
43 #include "runtime/frame.inline.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/stubRoutines.hpp"
46 #include "runtime/synchronizer.hpp"
47 #include "runtime/timer.hpp"
48 #include "runtime/vframeArray.hpp"
49 #include "utilities/align.hpp"
50 #include "utilities/debug.hpp"
51 #include "utilities/macros.hpp"
52
53 // Size of interpreter code. Increase if too small. Interpreter will
54 // fail with a guarantee ("not enough space for interpreter generation");
55 // if too small.
56 // Run with +PrintInterpreter to get the VM to print out the size.
57 // Max size with JVMTI
58 int TemplateInterpreter::InterpreterCodeSize = 180 * 1024;
59
60 #define __ _masm->
61
62 //------------------------------------------------------------------------------------------------------------------------
63
64 address TemplateInterpreterGenerator::generate_slow_signature_handler() {
65 address entry = __ pc();
66
67 // callee-save register for saving LR, shared with generate_native_entry
68 const Register Rsaved_ret_addr = AARCH64_ONLY(R21) NOT_AARCH64(Rtmp_save0);
69
70 __ mov(Rsaved_ret_addr, LR);
71
72 __ mov(R1, Rmethod);
73 __ mov(R2, Rlocals);
74 __ mov(R3, SP);
75
76 #ifdef AARCH64
77 // expand expr. stack and extended SP to avoid cutting SP in call_VM
78 __ mov(Rstack_top, SP);
79 __ str(Rstack_top, Address(FP, frame::interpreter_frame_extended_sp_offset * wordSize));
80 __ check_stack_top();
81
82 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), R1, R2, R3, false);
83
84 __ ldp(ZR, c_rarg1, Address(SP, 2*wordSize, post_indexed));
85 __ ldp(c_rarg2, c_rarg3, Address(SP, 2*wordSize, post_indexed));
86 __ ldp(c_rarg4, c_rarg5, Address(SP, 2*wordSize, post_indexed));
87 __ ldp(c_rarg6, c_rarg7, Address(SP, 2*wordSize, post_indexed));
88
89 __ ldp_d(V0, V1, Address(SP, 2*wordSize, post_indexed));
90 __ ldp_d(V2, V3, Address(SP, 2*wordSize, post_indexed));
91 __ ldp_d(V4, V5, Address(SP, 2*wordSize, post_indexed));
92 __ ldp_d(V6, V7, Address(SP, 2*wordSize, post_indexed));
93 #else
94
95 // Safer to save R9 (when scratched) since callers may have been
96 // written assuming R9 survives. This is suboptimal but
97 // probably not important for this slow case call site.
98 // Note for R9 saving: slow_signature_handler may copy register
99 // arguments above the current SP (passed as R3). It is safe for
100 // call_VM to use push and pop to protect additional values on the
101 // stack if needed.
102 __ call_VM(CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), true /* save R9 if needed*/);
103 __ add(SP, SP, wordSize); // Skip R0
104 __ pop(RegisterSet(R1, R3)); // Load arguments passed in registers
105 #ifdef __ABI_HARD__
106 // Few alternatives to an always-load-FP-registers approach:
107 // - parse method signature to detect FP arguments
108 // - keep a counter/flag on a stack indicationg number of FP arguments in the method.
109 // The later has been originally implemented and tested but a conditional path could
110 // eliminate any gain imposed by avoiding 8 double word loads.
111 __ fldmiad(SP, FloatRegisterSet(D0, 8), writeback);
112 #endif // __ABI_HARD__
113 #endif // AARCH64
114
115 __ ret(Rsaved_ret_addr);
116
117 return entry;
118 }
119
120
121 //
122 // Various method entries (that c++ and asm interpreter agree upon)
123 //------------------------------------------------------------------------------------------------------------------------
124 //
125 //
126
127 // Abstract method entry
128 // Attempt to execute abstract method. Throw exception
129 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
130 address entry_point = __ pc();
131
132 #ifdef AARCH64
133 __ restore_sp_after_call(Rtemp);
134 __ restore_stack_top();
135 #endif
136
137 __ empty_expression_stack();
138
139 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
140
141 DEBUG_ONLY(STOP("generate_abstract_entry");) // Should not reach here
142 return entry_point;
143 }
144
145 address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
146 if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
147
148 // TODO: ARM
149 return NULL;
150
151 address entry_point = __ pc();
152 STOP("generate_math_entry");
153 return entry_point;
154 }
155
156 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
157 address entry = __ pc();
158
159 // Note: There should be a minimal interpreter frame set up when stack
160 // overflow occurs since we check explicitly for it now.
161 //
162 #ifdef ASSERT
163 { Label L;
164 __ sub(Rtemp, FP, - frame::interpreter_frame_monitor_block_top_offset * wordSize);
165 __ cmp(SP, Rtemp); // Rtemp = maximal SP for current FP,
166 // (stack grows negative)
167 __ b(L, ls); // check if frame is complete
168 __ stop ("interpreter frame not set up");
169 __ bind(L);
170 }
171 #endif // ASSERT
172
173 // Restore bcp under the assumption that the current frame is still
174 // interpreted
175 __ restore_bcp();
176
177 // expression stack must be empty before entering the VM if an exception
178 // happened
179 __ empty_expression_stack();
180
181 // throw exception
182 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
183
184 __ should_not_reach_here();
185
186 return entry;
187 }
188
189 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
190 address entry = __ pc();
191
192 // index is in R4_ArrayIndexOutOfBounds_index
193
194 // expression stack must be empty before entering the VM if an exception happened
195 __ empty_expression_stack();
196
197 // setup parameters
198 // Array expected in R1.
199 __ mov(R2, R4_ArrayIndexOutOfBounds_index);
200
201 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), R1, R2);
202
203 __ nop(); // to avoid filling CPU pipeline with invalid instructions
204 __ nop();
205 __ should_not_reach_here();
206
207 return entry;
208 }
209
210 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
211 address entry = __ pc();
212
213 // object is in R2_ClassCastException_obj
214
215 // expression stack must be empty before entering the VM if an exception
216 // happened
217 __ empty_expression_stack();
218
219 __ mov(R1, R2_ClassCastException_obj);
220 __ call_VM(noreg,
221 CAST_FROM_FN_PTR(address,
222 InterpreterRuntime::throw_ClassCastException),
223 R1);
224
225 __ should_not_reach_here();
226
227 return entry;
228 }
229
230 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
231 assert(!pass_oop || message == NULL, "either oop or message but not both");
232 address entry = __ pc();
233
234 InlinedString Lname(name);
235 InlinedString Lmessage(message);
236
237 if (pass_oop) {
238 // object is at TOS
239 __ pop_ptr(R2);
240 }
241
242 // expression stack must be empty before entering the VM if an exception happened
243 __ empty_expression_stack();
244
245 // setup parameters
246 __ ldr_literal(R1, Lname);
247
248 if (pass_oop) {
249 __ call_VM(Rexception_obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), R1, R2);
250 } else {
251 if (message != NULL) {
252 __ ldr_literal(R2, Lmessage);
253 } else {
254 __ mov(R2, 0);
255 }
256 __ call_VM(Rexception_obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), R1, R2);
257 }
258
259 // throw exception
260 __ b(Interpreter::throw_exception_entry());
261
262 __ nop(); // to avoid filling CPU pipeline with invalid instructions
263 __ nop();
264 __ bind_literal(Lname);
265 if (!pass_oop && (message != NULL)) {
266 __ bind_literal(Lmessage);
267 }
268
269 return entry;
270 }
271
272 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
273 address entry = __ pc();
274
275 __ interp_verify_oop(R0_tos, state, __FILE__, __LINE__);
276
277 #ifdef AARCH64
278 __ restore_sp_after_call(Rtemp); // Restore SP to extended SP
279 __ restore_stack_top();
280 #else
281 // Restore stack bottom in case i2c adjusted stack
282 __ ldr(SP, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
283 // and NULL it as marker that SP is now tos until next java call
284 __ mov(Rtemp, (int)NULL_WORD);
285 __ str(Rtemp, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
286 #endif // AARCH64
287
288 __ restore_method();
289 __ restore_bcp();
290 __ restore_dispatch();
291 __ restore_locals();
292
293 const Register Rcache = R2_tmp;
294 const Register Rindex = R3_tmp;
295 __ get_cache_and_index_at_bcp(Rcache, Rindex, 1, index_size);
296
297 __ add(Rtemp, Rcache, AsmOperand(Rindex, lsl, LogBytesPerWord));
298 __ ldrb(Rtemp, Address(Rtemp, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
299 __ check_stack_top();
300 __ add(Rstack_top, Rstack_top, AsmOperand(Rtemp, lsl, Interpreter::logStackElementSize));
301
302 #ifndef AARCH64
303 __ convert_retval_to_tos(state);
304 #endif // !AARCH64
305
306 __ check_and_handle_popframe();
307 __ check_and_handle_earlyret();
308
309 __ dispatch_next(state, step);
310
311 return entry;
312 }
313
314
315 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
316 address entry = __ pc();
317
318 __ interp_verify_oop(R0_tos, state, __FILE__, __LINE__);
319
320 #ifdef AARCH64
321 __ restore_sp_after_call(Rtemp); // Restore SP to extended SP
322 __ restore_stack_top();
323 #else
324 // The stack is not extended by deopt but we must NULL last_sp as this
325 // entry is like a "return".
326 __ mov(Rtemp, 0);
327 __ str(Rtemp, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
328 #endif // AARCH64
329
330 __ restore_method();
331 __ restore_bcp();
332 __ restore_dispatch();
333 __ restore_locals();
334
335 // handle exceptions
336 { Label L;
337 __ ldr(Rtemp, Address(Rthread, Thread::pending_exception_offset()));
338 __ cbz(Rtemp, L);
339 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
340 __ should_not_reach_here();
341 __ bind(L);
342 }
343
344 if (continuation == NULL) {
345 __ dispatch_next(state, step);
346 } else {
347 __ jump_to_entry(continuation);
348 }
349
350 return entry;
351 }
352
353 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
354 #ifdef AARCH64
355 address entry = __ pc();
356 switch (type) {
357 case T_BOOLEAN:
358 __ tst(R0, 0xff);
359 __ cset(R0, ne);
360 break;
361 case T_CHAR : __ zero_extend(R0, R0, 16); break;
362 case T_BYTE : __ sign_extend(R0, R0, 8); break;
363 case T_SHORT : __ sign_extend(R0, R0, 16); break;
364 case T_INT : // fall through
365 case T_LONG : // fall through
366 case T_VOID : // fall through
367 case T_FLOAT : // fall through
368 case T_DOUBLE : /* nothing to do */ break;
369 case T_OBJECT :
370 // retrieve result from frame
371 __ ldr(R0, Address(FP, frame::interpreter_frame_oop_temp_offset * wordSize));
372 // and verify it
373 __ verify_oop(R0);
374 break;
375 default : ShouldNotReachHere();
376 }
377 __ ret();
378 return entry;
379 #else
380 // Result handlers are not used on 32-bit ARM
381 // since the returned value is already in appropriate format.
382 __ should_not_reach_here(); // to avoid empty code block
383
384 // The result handler non-zero indicates an object is returned and this is
385 // used in the native entry code.
386 return type == T_OBJECT ? (address)(-1) : NULL;
387 #endif // AARCH64
388 }
389
390 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {
391 address entry = __ pc();
392 __ push(state);
393 __ call_VM(noreg, runtime_entry);
394
395 // load current bytecode
396 __ ldrb(R3_bytecode, Address(Rbcp));
397 __ dispatch_only_normal(vtos);
398 return entry;
399 }
400
401
402 // Helpers for commoning out cases in the various type of method entries.
403 //
404
405 // increment invocation count & check for overflow
406 //
407 // Note: checking for negative value instead of overflow
408 // so we have a 'sticky' overflow test
409 //
410 // In: Rmethod.
411 //
412 // Uses R0, R1, Rtemp.
413 //
414 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow,
415 Label* profile_method,
416 Label* profile_method_continue) {
417 Label done;
418 const Register Rcounters = Rtemp;
419 const Address invocation_counter(Rcounters,
420 MethodCounters::invocation_counter_offset() +
421 InvocationCounter::counter_offset());
422
423 // Note: In tiered we increment either counters in MethodCounters* or
424 // in MDO depending if we're profiling or not.
425 if (TieredCompilation) {
426 int increment = InvocationCounter::count_increment;
427 Label no_mdo;
428 if (ProfileInterpreter) {
429 // Are we profiling?
430 __ ldr(R1_tmp, Address(Rmethod, Method::method_data_offset()));
431 __ cbz(R1_tmp, no_mdo);
432 // Increment counter in the MDO
433 const Address mdo_invocation_counter(R1_tmp,
434 in_bytes(MethodData::invocation_counter_offset()) +
435 in_bytes(InvocationCounter::counter_offset()));
436 const Address mask(R1_tmp, in_bytes(MethodData::invoke_mask_offset()));
437 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, R0_tmp, Rtemp, eq, overflow);
438 __ b(done);
439 }
440 __ bind(no_mdo);
441 __ get_method_counters(Rmethod, Rcounters, done);
442 const Address mask(Rcounters, in_bytes(MethodCounters::invoke_mask_offset()));
443 __ increment_mask_and_jump(invocation_counter, increment, mask, R0_tmp, R1_tmp, eq, overflow);
444 __ bind(done);
445 } else { // not TieredCompilation
446 const Address backedge_counter(Rcounters,
447 MethodCounters::backedge_counter_offset() +
448 InvocationCounter::counter_offset());
449
450 const Register Ricnt = R0_tmp; // invocation counter
451 const Register Rbcnt = R1_tmp; // backedge counter
452
453 __ get_method_counters(Rmethod, Rcounters, done);
454
455 if (ProfileInterpreter) {
456 const Register Riic = R1_tmp;
457 __ ldr_s32(Riic, Address(Rcounters, MethodCounters::interpreter_invocation_counter_offset()));
458 __ add(Riic, Riic, 1);
459 __ str_32(Riic, Address(Rcounters, MethodCounters::interpreter_invocation_counter_offset()));
460 }
461
462 // Update standard invocation counters
463
464 __ ldr_u32(Ricnt, invocation_counter);
465 __ ldr_u32(Rbcnt, backedge_counter);
466
467 __ add(Ricnt, Ricnt, InvocationCounter::count_increment);
468
469 #ifdef AARCH64
470 __ andr(Rbcnt, Rbcnt, (unsigned int)InvocationCounter::count_mask_value); // mask out the status bits
471 #else
472 __ bic(Rbcnt, Rbcnt, ~InvocationCounter::count_mask_value); // mask out the status bits
473 #endif // AARCH64
474
475 __ str_32(Ricnt, invocation_counter); // save invocation count
476 __ add(Ricnt, Ricnt, Rbcnt); // add both counters
477
478 // profile_method is non-null only for interpreted method so
479 // profile_method != NULL == !native_call
480 // BytecodeInterpreter only calls for native so code is elided.
481
482 if (ProfileInterpreter && profile_method != NULL) {
483 assert(profile_method_continue != NULL, "should be non-null");
484
485 // Test to see if we should create a method data oop
486 // Reuse R1_tmp as we don't need backedge counters anymore.
487 Address profile_limit(Rcounters, in_bytes(MethodCounters::interpreter_profile_limit_offset()));
488 __ ldr_s32(R1_tmp, profile_limit);
489 __ cmp_32(Ricnt, R1_tmp);
490 __ b(*profile_method_continue, lt);
491
492 // if no method data exists, go to profile_method
493 __ test_method_data_pointer(R1_tmp, *profile_method);
494 }
495
496 Address invoke_limit(Rcounters, in_bytes(MethodCounters::interpreter_invocation_limit_offset()));
497 __ ldr_s32(R1_tmp, invoke_limit);
498 __ cmp_32(Ricnt, R1_tmp);
499 __ b(*overflow, hs);
500 __ bind(done);
501 }
502 }
503
504 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
505 // InterpreterRuntime::frequency_counter_overflow takes one argument
506 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
507 // The call returns the address of the verified entry point for the method or NULL
508 // if the compilation did not complete (either went background or bailed out).
509 __ mov(R1, (int)false);
510 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R1);
511
512 // jump to the interpreted entry.
513 __ b(do_continue);
514 }
515
516 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
517 // Check if we've got enough room on the stack for
518 // - overhead;
519 // - locals;
520 // - expression stack.
521 //
522 // Registers on entry:
523 //
524 // R3 = number of additional locals
525 // R11 = max expression stack slots (AArch64 only)
526 // Rthread
527 // Rmethod
528 // Registers used: R0, R1, R2, Rtemp.
529
530 const Register Radditional_locals = R3;
531 const Register RmaxStack = AARCH64_ONLY(R11) NOT_AARCH64(R2);
532
533 // monitor entry size
534 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
535
536 // total overhead size: entry_size + (saved registers, thru expr stack bottom).
537 // be sure to change this if you add/subtract anything to/from the overhead area
538 const int overhead_size = (frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset)*wordSize + entry_size;
539
540 // Pages reserved for VM runtime calls and subsequent Java calls.
541 const int reserved_pages = JavaThread::stack_shadow_zone_size();
542
543 // Thread::stack_size() includes guard pages, and they should not be touched.
544 const int guard_pages = JavaThread::stack_guard_zone_size();
545
546 __ ldr(R0, Address(Rthread, Thread::stack_base_offset()));
547 __ ldr(R1, Address(Rthread, Thread::stack_size_offset()));
548 #ifndef AARCH64
549 __ ldr(Rtemp, Address(Rmethod, Method::const_offset()));
550 __ ldrh(RmaxStack, Address(Rtemp, ConstMethod::max_stack_offset()));
551 #endif // !AARCH64
552 __ sub_slow(Rtemp, SP, overhead_size + reserved_pages + guard_pages + Method::extra_stack_words());
553
554 // reserve space for additional locals
555 __ sub(Rtemp, Rtemp, AsmOperand(Radditional_locals, lsl, Interpreter::logStackElementSize));
556
557 // stack size
558 __ sub(R0, R0, R1);
559
560 // reserve space for expression stack
561 __ sub(Rtemp, Rtemp, AsmOperand(RmaxStack, lsl, Interpreter::logStackElementSize));
562
563 __ cmp(Rtemp, R0);
564
565 #ifdef AARCH64
566 Label L;
567 __ b(L, hi);
568 __ mov(SP, Rsender_sp); // restore SP
569 __ b(StubRoutines::throw_StackOverflowError_entry());
570 __ bind(L);
571 #else
572 __ mov(SP, Rsender_sp, ls); // restore SP
573 __ b(StubRoutines::throw_StackOverflowError_entry(), ls);
574 #endif // AARCH64
575 }
576
577
578 // Allocate monitor and lock method (asm interpreter)
579 //
580 void TemplateInterpreterGenerator::lock_method() {
581 // synchronize method
582
583 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
584 assert ((entry_size % StackAlignmentInBytes) == 0, "should keep stack alignment");
585
586 #ifdef ASSERT
587 { Label L;
588 __ ldr_u32(Rtemp, Address(Rmethod, Method::access_flags_offset()));
589 __ tbnz(Rtemp, JVM_ACC_SYNCHRONIZED_BIT, L);
590 __ stop("method doesn't need synchronization");
591 __ bind(L);
592 }
593 #endif // ASSERT
594
595 // get synchronization object
596 { Label done;
597 __ ldr_u32(Rtemp, Address(Rmethod, Method::access_flags_offset()));
598 #ifdef AARCH64
599 __ ldr(R0, Address(Rlocals, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
600 __ tbz(Rtemp, JVM_ACC_STATIC_BIT, done);
601 #else
602 __ tst(Rtemp, JVM_ACC_STATIC);
603 __ ldr(R0, Address(Rlocals, Interpreter::local_offset_in_bytes(0)), eq); // get receiver (assume this is frequent case)
604 __ b(done, eq);
605 #endif // AARCH64
606 __ load_mirror(R0, Rmethod, Rtemp);
607 __ bind(done);
608 }
609
610 // add space for monitor & lock
611
612 #ifdef AARCH64
613 __ check_extended_sp(Rtemp);
614 __ sub(SP, SP, entry_size); // adjust extended SP
615 __ mov(Rtemp, SP);
616 __ str(Rtemp, Address(FP, frame::interpreter_frame_extended_sp_offset * wordSize));
617 #endif // AARCH64
618
619 __ sub(Rstack_top, Rstack_top, entry_size);
620 __ check_stack_top_on_expansion();
621 // add space for a monitor entry
622 __ str(Rstack_top, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize));
623 // set new monitor block top
624 __ str(R0, Address(Rstack_top, BasicObjectLock::obj_offset_in_bytes()));
625 // store object
626 __ mov(R1, Rstack_top); // monitor entry address
627 __ lock_object(R1);
628 }
629
630 #ifdef AARCH64
631
632 //
633 // Generate a fixed interpreter frame. This is identical setup for interpreted methods
634 // and for native methods hence the shared code.
635 //
636 // On entry:
637 // R10 = ConstMethod
638 // R11 = max expr. stack (in slots), if !native_call
639 //
640 // On exit:
641 // Rbcp, Rstack_top are initialized, SP is extended
642 //
643 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
644 // Incoming registers
645 const Register RconstMethod = R10;
646 const Register RmaxStack = R11;
647 // Temporary registers
648 const Register RextendedSP = R0;
649 const Register Rcache = R1;
650 const Register Rmdp = ProfileInterpreter ? R2 : ZR;
651
652 // Generates the following stack layout (stack grows up in this picture):
653 //
654 // [ expr. stack bottom ]
655 // [ saved Rbcp ]
656 // [ current Rlocals ]
657 // [ cache ]
658 // [ mdx ]
659 // [ mirror ]
660 // [ Method* ]
661 // [ extended SP ]
662 // [ expr. stack top ]
663 // [ sender_sp ]
664 // [ saved FP ] <--- FP
665 // [ saved LR ]
666
667 // initialize fixed part of activation frame
668 __ stp(FP, LR, Address(SP, -2*wordSize, pre_indexed));
669 __ mov(FP, SP); // establish new FP
670
671 // setup Rbcp
672 if (native_call) {
673 __ mov(Rbcp, ZR); // bcp = 0 for native calls
674 } else {
675 __ add(Rbcp, RconstMethod, in_bytes(ConstMethod::codes_offset())); // get codebase
676 }
677
678 // Rstack_top & RextendedSP
679 __ sub(Rstack_top, SP, 10*wordSize);
680 if (native_call) {
681 __ sub(RextendedSP, Rstack_top, align_up(wordSize, StackAlignmentInBytes)); // reserve 1 slot for exception handling
682 } else {
683 __ sub(RextendedSP, Rstack_top, AsmOperand(RmaxStack, lsl, Interpreter::logStackElementSize));
684 __ align_reg(RextendedSP, RextendedSP, StackAlignmentInBytes);
685 }
686 __ mov(SP, RextendedSP);
687 __ check_stack_top();
688
689 // Load Rmdp
690 if (ProfileInterpreter) {
691 __ ldr(Rtemp, Address(Rmethod, Method::method_data_offset()));
692 __ tst(Rtemp, Rtemp);
693 __ add(Rtemp, Rtemp, in_bytes(MethodData::data_offset()));
694 __ csel(Rmdp, ZR, Rtemp, eq);
695 }
696
697 // Load Rcache
698 __ ldr(Rtemp, Address(RconstMethod, ConstMethod::constants_offset()));
699 __ ldr(Rcache, Address(Rtemp, ConstantPool::cache_offset_in_bytes()));
700 // Get mirror and store it in the frame as GC root for this Method*
701 __ load_mirror(Rtemp, Rmethod, Rtemp);
702
703 // Build fixed frame
704 __ stp(Rstack_top, Rbcp, Address(FP, -10*wordSize));
705 __ stp(Rlocals, Rcache, Address(FP, -8*wordSize));
706 __ stp(Rmdp, Rtemp, Address(FP, -6*wordSize));
707 __ stp(Rmethod, RextendedSP, Address(FP, -4*wordSize));
708 __ stp(ZR, Rsender_sp, Address(FP, -2*wordSize));
709 assert(frame::interpreter_frame_initial_sp_offset == -10, "interpreter frame broken");
710 assert(frame::interpreter_frame_stack_top_offset == -2, "stack top broken");
711 }
712
713 #else // AARCH64
714
715 //
716 // Generate a fixed interpreter frame. This is identical setup for interpreted methods
717 // and for native methods hence the shared code.
718
719 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
720 // Generates the following stack layout:
721 //
722 // [ expr. stack bottom ]
723 // [ saved Rbcp ]
724 // [ current Rlocals ]
725 // [ cache ]
726 // [ mdx ]
727 // [ Method* ]
728 // [ last_sp ]
729 // [ sender_sp ]
730 // [ saved FP ] <--- FP
731 // [ saved LR ]
732
733 // initialize fixed part of activation frame
734 __ push(LR); // save return address
735 __ push(FP); // save FP
736 __ mov(FP, SP); // establish new FP
737
738 __ push(Rsender_sp);
739
740 __ mov(R0, 0);
741 __ push(R0); // leave last_sp as null
742
743 // setup Rbcp
744 if (native_call) {
745 __ mov(Rbcp, 0); // bcp = 0 for native calls
746 } else {
747 __ ldr(Rtemp, Address(Rmethod, Method::const_offset())); // get ConstMethod*
748 __ add(Rbcp, Rtemp, ConstMethod::codes_offset()); // get codebase
749 }
750
751 __ push(Rmethod); // save Method*
752 // Get mirror and store it in the frame as GC root for this Method*
753 __ load_mirror(Rtemp, Rmethod, Rtemp);
754 __ push(Rtemp);
755
756 if (ProfileInterpreter) {
757 __ ldr(Rtemp, Address(Rmethod, Method::method_data_offset()));
758 __ tst(Rtemp, Rtemp);
759 __ add(Rtemp, Rtemp, in_bytes(MethodData::data_offset()), ne);
760 __ push(Rtemp); // set the mdp (method data pointer)
761 } else {
762 __ push(R0);
763 }
764
765 __ ldr(Rtemp, Address(Rmethod, Method::const_offset()));
766 __ ldr(Rtemp, Address(Rtemp, ConstMethod::constants_offset()));
767 __ ldr(Rtemp, Address(Rtemp, ConstantPool::cache_offset_in_bytes()));
768 __ push(Rtemp); // set constant pool cache
769 __ push(Rlocals); // set locals pointer
770 __ push(Rbcp); // set bcp
771 __ push(R0); // reserve word for pointer to expression stack bottom
772 __ str(SP, Address(SP, 0)); // set expression stack bottom
773 }
774
775 #endif // AARCH64
776
777 // End of helpers
778
779 //------------------------------------------------------------------------------------------------------------------------
780 // Entry points
781 //
782 // Here we generate the various kind of entries into the interpreter.
783 // The two main entry type are generic bytecode methods and native call method.
784 // These both come in synchronized and non-synchronized versions but the
785 // frame layout they create is very similar. The other method entry
786 // types are really just special purpose entries that are really entry
787 // and interpretation all in one. These are for trivial methods like
788 // accessor, empty, or special math methods.
789 //
790 // When control flow reaches any of the entry types for the interpreter
791 // the following holds ->
792 //
793 // Arguments:
794 //
795 // Rmethod: Method*
796 // Rthread: thread
797 // Rsender_sp: sender sp
798 // Rparams (SP on 32-bit ARM): pointer to method parameters
799 //
800 // LR: return address
801 //
802 // Stack layout immediately at entry
803 //
804 // [ optional padding(*)] <--- SP (AArch64)
805 // [ parameter n ] <--- Rparams (SP on 32-bit ARM)
806 // ...
807 // [ parameter 1 ]
808 // [ expression stack ] (caller's java expression stack)
809
810 // Assuming that we don't go to one of the trivial specialized
811 // entries the stack will look like below when we are ready to execute
812 // the first bytecode (or call the native routine). The register usage
813 // will be as the template based interpreter expects.
814 //
815 // local variables follow incoming parameters immediately; i.e.
816 // the return address is saved at the end of the locals.
817 //
818 // [ reserved stack (*) ] <--- SP (AArch64)
819 // [ expr. stack ] <--- Rstack_top (SP on 32-bit ARM)
820 // [ monitor entry ]
821 // ...
822 // [ monitor entry ]
823 // [ expr. stack bottom ]
824 // [ saved Rbcp ]
825 // [ current Rlocals ]
826 // [ cache ]
827 // [ mdx ]
828 // [ mirror ]
829 // [ Method* ]
830 //
831 // 32-bit ARM:
832 // [ last_sp ]
833 //
834 // AArch64:
835 // [ extended SP (*) ]
836 // [ stack top (*) ]
837 //
838 // [ sender_sp ]
839 // [ saved FP ] <--- FP
840 // [ saved LR ]
841 // [ optional padding(*)]
842 // [ local variable m ]
843 // ...
844 // [ local variable 1 ]
845 // [ parameter n ]
846 // ...
847 // [ parameter 1 ] <--- Rlocals
848 //
849 // (*) - AArch64 only
850 //
851
852 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
853 // Code: _aload_0, _getfield, _areturn
854 // parameter size = 1
855 //
856 // The code that gets generated by this routine is split into 2 parts:
857 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load,
858 // 2. The slow path - which is an expansion of the regular method entry.
859 //
860 // Notes:-
861 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed.
862 // * We may jump to the slow path iff the receiver is null. If the
863 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load
864 // Thus we can use the regular method entry code to generate the NPE.
865 //
866 // Rmethod: Method*
867 // Rthread: thread
868 // Rsender_sp: sender sp, must be preserved for slow path, set SP to it on fast path
869 // Rparams: parameters
870
871 address entry = __ pc();
872 Label slow_path;
873 const Register Rthis = R0;
874 const Register Rret_addr = Rtmp_save1;
875 assert_different_registers(Rthis, Rret_addr, Rsender_sp);
876
877 const int referent_offset = java_lang_ref_Reference::referent_offset;
878 guarantee(referent_offset > 0, "referent offset not initialized");
879
880 // Check if local 0 != NULL
881 // If the receiver is null then it is OK to jump to the slow path.
882 __ ldr(Rthis, Address(Rparams));
883 __ cbz(Rthis, slow_path);
884
885 // Preserve LR
886 __ mov(Rret_addr, LR);
887
888 // Load the value of the referent field.
889 const Address field_address(Rthis, referent_offset);
890 __ load_heap_oop(R0, field_address, Rtemp, R1_tmp, R2_tmp, ON_WEAK_OOP_REF);
891
892 // _areturn
893 __ mov(SP, Rsender_sp);
894 __ ret(Rret_addr);
895
896 // generate a vanilla interpreter entry as the slow path
897 __ bind(slow_path);
898 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
899 return entry;
900 }
901
902 // Not supported
903 address TemplateInterpreterGenerator::generate_CRC32_update_entry() { return NULL; }
904 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { return NULL; }
905 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { return NULL; }
906
907 //
908 // Interpreter stub for calling a native method. (asm interpreter)
909 // This sets up a somewhat different looking stack for calling the native method
910 // than the typical interpreter frame setup.
911 //
912
913 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
914 // determine code generation flags
915 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
916
917 // Incoming registers:
918 //
919 // Rmethod: Method*
920 // Rthread: thread
921 // Rsender_sp: sender sp
922 // Rparams: parameters
923
924 address entry_point = __ pc();
925
926 // Register allocation
927 const Register Rsize_of_params = AARCH64_ONLY(R20) NOT_AARCH64(R6);
928 const Register Rsig_handler = AARCH64_ONLY(R21) NOT_AARCH64(Rtmp_save0 /* R4 */);
929 const Register Rnative_code = AARCH64_ONLY(R22) NOT_AARCH64(Rtmp_save1 /* R5 */);
930 const Register Rresult_handler = AARCH64_ONLY(Rsig_handler) NOT_AARCH64(R6);
931
932 #ifdef AARCH64
933 const Register RconstMethod = R10; // also used in generate_fixed_frame (should match)
934 const Register Rsaved_result = Rnative_code;
935 const FloatRegister Dsaved_result = V8;
936 #else
937 const Register Rsaved_result_lo = Rtmp_save0; // R4
938 const Register Rsaved_result_hi = Rtmp_save1; // R5
939 FloatRegister saved_result_fp;
940 #endif // AARCH64
941
942
943 #ifdef AARCH64
944 __ ldr(RconstMethod, Address(Rmethod, Method::const_offset()));
945 __ ldrh(Rsize_of_params, Address(RconstMethod, ConstMethod::size_of_parameters_offset()));
946 #else
947 __ ldr(Rsize_of_params, Address(Rmethod, Method::const_offset()));
948 __ ldrh(Rsize_of_params, Address(Rsize_of_params, ConstMethod::size_of_parameters_offset()));
949 #endif // AARCH64
950
951 // native calls don't need the stack size check since they have no expression stack
952 // and the arguments are already on the stack and we only add a handful of words
953 // to the stack
954
955 // compute beginning of parameters (Rlocals)
956 __ sub(Rlocals, Rparams, wordSize);
957 __ add(Rlocals, Rlocals, AsmOperand(Rsize_of_params, lsl, Interpreter::logStackElementSize));
958
959 #ifdef AARCH64
960 int extra_stack_reserve = 2*wordSize; // extra space for oop_temp
961 if(__ can_post_interpreter_events()) {
962 // extra space for saved results
963 extra_stack_reserve += 2*wordSize;
964 }
965 // reserve extra stack space and nullify oop_temp slot
966 __ stp(ZR, ZR, Address(SP, -extra_stack_reserve, pre_indexed));
967 #else
968 // reserve stack space for oop_temp
969 __ mov(R0, 0);
970 __ push(R0);
971 #endif // AARCH64
972
973 generate_fixed_frame(true); // Note: R9 is now saved in the frame
974
975 // make sure method is native & not abstract
976 #ifdef ASSERT
977 __ ldr_u32(Rtemp, Address(Rmethod, Method::access_flags_offset()));
978 {
979 Label L;
980 __ tbnz(Rtemp, JVM_ACC_NATIVE_BIT, L);
981 __ stop("tried to execute non-native method as native");
982 __ bind(L);
983 }
984 { Label L;
985 __ tbz(Rtemp, JVM_ACC_ABSTRACT_BIT, L);
986 __ stop("tried to execute abstract method in interpreter");
987 __ bind(L);
988 }
989 #endif
990
991 // increment invocation count & check for overflow
992 Label invocation_counter_overflow;
993 if (inc_counter) {
994 if (synchronized) {
995 // Avoid unlocking method's monitor in case of exception, as it has not
996 // been locked yet.
997 __ set_do_not_unlock_if_synchronized(true, Rtemp);
998 }
999 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1000 }
1001
1002 Label continue_after_compile;
1003 __ bind(continue_after_compile);
1004
1005 if (inc_counter && synchronized) {
1006 __ set_do_not_unlock_if_synchronized(false, Rtemp);
1007 }
1008
1009 // check for synchronized methods
1010 // Must happen AFTER invocation_counter check and stack overflow check,
1011 // so method is not locked if overflows.
1012 //
1013 if (synchronized) {
1014 lock_method();
1015 } else {
1016 // no synchronization necessary
1017 #ifdef ASSERT
1018 { Label L;
1019 __ ldr_u32(Rtemp, Address(Rmethod, Method::access_flags_offset()));
1020 __ tbz(Rtemp, JVM_ACC_SYNCHRONIZED_BIT, L);
1021 __ stop("method needs synchronization");
1022 __ bind(L);
1023 }
1024 #endif
1025 }
1026
1027 // start execution
1028 #ifdef ASSERT
1029 { Label L;
1030 __ ldr(Rtemp, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize));
1031 __ cmp(Rtemp, Rstack_top);
1032 __ b(L, eq);
1033 __ stop("broken stack frame setup in interpreter");
1034 __ bind(L);
1035 }
1036 #endif
1037 __ check_extended_sp(Rtemp);
1038
1039 // jvmti/dtrace support
1040 __ notify_method_entry();
1041 #if R9_IS_SCRATCHED
1042 __ restore_method();
1043 #endif
1044
1045 {
1046 Label L;
1047 __ ldr(Rsig_handler, Address(Rmethod, Method::signature_handler_offset()));
1048 __ cbnz(Rsig_handler, L);
1049 __ mov(R1, Rmethod);
1050 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), R1, true);
1051 __ ldr(Rsig_handler, Address(Rmethod, Method::signature_handler_offset()));
1052 __ bind(L);
1053 }
1054
1055 {
1056 Label L;
1057 __ ldr(Rnative_code, Address(Rmethod, Method::native_function_offset()));
1058 __ cbnz(Rnative_code, L);
1059 __ mov(R1, Rmethod);
1060 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), R1);
1061 __ ldr(Rnative_code, Address(Rmethod, Method::native_function_offset()));
1062 __ bind(L);
1063 }
1064
1065 // Allocate stack space for arguments
1066
1067 #ifdef AARCH64
1068 __ sub(Rtemp, SP, Rsize_of_params, ex_uxtw, LogBytesPerWord);
1069 __ align_reg(SP, Rtemp, StackAlignmentInBytes);
1070
1071 // Allocate more stack space to accomodate all arguments passed on GP and FP registers:
1072 // 8 * wordSize for GPRs
1073 // 8 * wordSize for FPRs
1074 int reg_arguments = align_up(8*wordSize + 8*wordSize, StackAlignmentInBytes);
1075 #else
1076
1077 // C functions need aligned stack
1078 __ bic(SP, SP, StackAlignmentInBytes - 1);
1079 // Multiply by BytesPerLong instead of BytesPerWord, because calling convention
1080 // may require empty slots due to long alignment, e.g. func(int, jlong, int, jlong)
1081 __ sub(SP, SP, AsmOperand(Rsize_of_params, lsl, LogBytesPerLong));
1082
1083 #ifdef __ABI_HARD__
1084 // Allocate more stack space to accomodate all GP as well as FP registers:
1085 // 4 * wordSize
1086 // 8 * BytesPerLong
1087 int reg_arguments = align_up((4*wordSize) + (8*BytesPerLong), StackAlignmentInBytes);
1088 #else
1089 // Reserve at least 4 words on the stack for loading
1090 // of parameters passed on registers (R0-R3).
1091 // See generate_slow_signature_handler().
1092 // It is also used for JNIEnv & class additional parameters.
1093 int reg_arguments = 4 * wordSize;
1094 #endif // __ABI_HARD__
1095 #endif // AARCH64
1096
1097 __ sub(SP, SP, reg_arguments);
1098
1099
1100 // Note: signature handler blows R4 (32-bit ARM) or R21 (AArch64) besides all scratch registers.
1101 // See AbstractInterpreterGenerator::generate_slow_signature_handler().
1102 __ call(Rsig_handler);
1103 #if R9_IS_SCRATCHED
1104 __ restore_method();
1105 #endif
1106 __ mov(Rresult_handler, R0);
1107
1108 // Pass JNIEnv and mirror for static methods
1109 {
1110 Label L;
1111 __ ldr_u32(Rtemp, Address(Rmethod, Method::access_flags_offset()));
1112 __ add(R0, Rthread, in_bytes(JavaThread::jni_environment_offset()));
1113 __ tbz(Rtemp, JVM_ACC_STATIC_BIT, L);
1114 __ load_mirror(Rtemp, Rmethod, Rtemp);
1115 __ add(R1, FP, frame::interpreter_frame_oop_temp_offset * wordSize);
1116 __ str(Rtemp, Address(R1, 0));
1117 __ bind(L);
1118 }
1119
1120 __ set_last_Java_frame(SP, FP, true, Rtemp);
1121
1122 // Changing state to _thread_in_native must be the last thing to do
1123 // before the jump to native code. At this moment stack must be
1124 // safepoint-safe and completely prepared for stack walking.
1125 #ifdef ASSERT
1126 {
1127 Label L;
1128 __ ldr_u32(Rtemp, Address(Rthread, JavaThread::thread_state_offset()));
1129 __ cmp_32(Rtemp, _thread_in_Java);
1130 __ b(L, eq);
1131 __ stop("invalid thread state");
1132 __ bind(L);
1133 }
1134 #endif
1135
1136 #ifdef AARCH64
1137 __ mov(Rtemp, _thread_in_native);
1138 __ add(Rtemp2, Rthread, in_bytes(JavaThread::thread_state_offset()));
1139 // STLR is used to force all preceding writes to be observed prior to thread state change
1140 __ stlr_w(Rtemp, Rtemp2);
1141 #else
1142 // Force all preceding writes to be observed prior to thread state change
1143 __ membar(MacroAssembler::StoreStore, Rtemp);
1144
1145 __ mov(Rtemp, _thread_in_native);
1146 __ str(Rtemp, Address(Rthread, JavaThread::thread_state_offset()));
1147 #endif // AARCH64
1148
1149 __ call(Rnative_code);
1150 #if R9_IS_SCRATCHED
1151 __ restore_method();
1152 #endif
1153
1154 // Set FPSCR/FPCR to a known state
1155 if (AlwaysRestoreFPU) {
1156 __ restore_default_fp_mode();
1157 }
1158
1159 // Do safepoint check
1160 __ mov(Rtemp, _thread_in_native_trans);
1161 __ str_32(Rtemp, Address(Rthread, JavaThread::thread_state_offset()));
1162
1163 // Force this write out before the read below
1164 __ membar(MacroAssembler::StoreLoad, Rtemp);
1165
1166 __ ldr_global_s32(Rtemp, SafepointSynchronize::address_of_state());
1167
1168 // Protect the return value in the interleaved code: save it to callee-save registers.
1169 #ifdef AARCH64
1170 __ mov(Rsaved_result, R0);
1171 __ fmov_d(Dsaved_result, D0);
1172 #else
1173 __ mov(Rsaved_result_lo, R0);
1174 __ mov(Rsaved_result_hi, R1);
1175 #ifdef __ABI_HARD__
1176 // preserve native FP result in a callee-saved register
1177 saved_result_fp = D8;
1178 __ fcpyd(saved_result_fp, D0);
1179 #else
1180 saved_result_fp = fnoreg;
1181 #endif // __ABI_HARD__
1182 #endif // AARCH64
1183
1184 {
1185 __ ldr_u32(R3, Address(Rthread, JavaThread::suspend_flags_offset()));
1186 __ cmp(Rtemp, SafepointSynchronize::_not_synchronized);
1187 __ cond_cmp(R3, 0, eq);
1188
1189 #ifdef AARCH64
1190 Label L;
1191 __ b(L, eq);
1192 __ mov(R0, Rthread);
1193 __ call(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), relocInfo::none);
1194 __ bind(L);
1195 #else
1196 __ mov(R0, Rthread, ne);
1197 __ call(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), relocInfo::none, ne);
1198 #if R9_IS_SCRATCHED
1199 __ restore_method();
1200 #endif
1201 #endif // AARCH64
1202 }
1203
1204 // Perform Native->Java thread transition
1205 __ mov(Rtemp, _thread_in_Java);
1206 __ str_32(Rtemp, Address(Rthread, JavaThread::thread_state_offset()));
1207
1208 // Zero handles and last_java_sp
1209 __ reset_last_Java_frame(Rtemp);
1210 __ ldr(R3, Address(Rthread, JavaThread::active_handles_offset()));
1211 __ str_32(__ zero_register(Rtemp), Address(R3, JNIHandleBlock::top_offset_in_bytes()));
1212 if (CheckJNICalls) {
1213 __ str(__ zero_register(Rtemp), Address(Rthread, JavaThread::pending_jni_exception_check_fn_offset()));
1214 }
1215
1216 // Unbox oop result, e.g. JNIHandles::resolve result if it's an oop.
1217 {
1218 Label Lnot_oop;
1219 #ifdef AARCH64
1220 __ mov_slow(Rtemp, AbstractInterpreter::result_handler(T_OBJECT));
1221 __ cmp(Rresult_handler, Rtemp);
1222 __ b(Lnot_oop, ne);
1223 #else // !AARCH64
1224 // For ARM32, Rresult_handler is -1 for oop result, 0 otherwise.
1225 __ cbz(Rresult_handler, Lnot_oop);
1226 #endif // !AARCH64
1227 Register value = AARCH64_ONLY(Rsaved_result) NOT_AARCH64(Rsaved_result_lo);
1228 __ resolve_jobject(value, // value
1229 Rtemp, // tmp1
1230 R1_tmp); // tmp2
1231 // Store resolved result in frame for GC visibility.
1232 __ str(value, Address(FP, frame::interpreter_frame_oop_temp_offset * wordSize));
1233 __ bind(Lnot_oop);
1234 }
1235
1236 #ifdef AARCH64
1237 // Restore SP (drop native parameters area), to keep SP in sync with extended_sp in frame
1238 __ restore_sp_after_call(Rtemp);
1239 __ check_stack_top();
1240 #endif // AARCH64
1241
1242 // reguard stack if StackOverflow exception happened while in native.
1243 {
1244 __ ldr_u32(Rtemp, Address(Rthread, JavaThread::stack_guard_state_offset()));
1245 __ cmp_32(Rtemp, JavaThread::stack_guard_yellow_reserved_disabled);
1246 #ifdef AARCH64
1247 Label L;
1248 __ b(L, ne);
1249 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages), relocInfo::none);
1250 __ bind(L);
1251 #else
1252 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages), relocInfo::none, eq);
1253 #if R9_IS_SCRATCHED
1254 __ restore_method();
1255 #endif
1256 #endif // AARCH64
1257 }
1258
1259 // check pending exceptions
1260 {
1261 __ ldr(Rtemp, Address(Rthread, Thread::pending_exception_offset()));
1262 #ifdef AARCH64
1263 Label L;
1264 __ cbz(Rtemp, L);
1265 __ mov_pc_to(Rexception_pc);
1266 __ b(StubRoutines::forward_exception_entry());
1267 __ bind(L);
1268 #else
1269 __ cmp(Rtemp, 0);
1270 __ mov(Rexception_pc, PC, ne);
1271 __ b(StubRoutines::forward_exception_entry(), ne);
1272 #endif // AARCH64
1273 }
1274
1275 if (synchronized) {
1276 // address of first monitor
1277 __ sub(R1, FP, - (frame::interpreter_frame_monitor_block_bottom_offset - frame::interpreter_frame_monitor_size()) * wordSize);
1278 __ unlock_object(R1);
1279 }
1280
1281 // jvmti/dtrace support
1282 // Note: This must happen _after_ handling/throwing any exceptions since
1283 // the exception handler code notifies the runtime of method exits
1284 // too. If this happens before, method entry/exit notifications are
1285 // not properly paired (was bug - gri 11/22/99).
1286 #ifdef AARCH64
1287 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI, true, Rsaved_result, noreg, Dsaved_result);
1288 #else
1289 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI, true, Rsaved_result_lo, Rsaved_result_hi, saved_result_fp);
1290 #endif // AARCH64
1291
1292 // Restore the result. Oop result is restored from the stack.
1293 #ifdef AARCH64
1294 __ mov(R0, Rsaved_result);
1295 __ fmov_d(D0, Dsaved_result);
1296
1297 __ blr(Rresult_handler);
1298 #else
1299 __ cmp(Rresult_handler, 0);
1300 __ ldr(R0, Address(FP, frame::interpreter_frame_oop_temp_offset * wordSize), ne);
1301 __ mov(R0, Rsaved_result_lo, eq);
1302 __ mov(R1, Rsaved_result_hi);
1303
1304 #ifdef __ABI_HARD__
1305 // reload native FP result
1306 __ fcpyd(D0, D8);
1307 #endif // __ABI_HARD__
1308
1309 #ifdef ASSERT
1310 if (VerifyOops) {
1311 Label L;
1312 __ cmp(Rresult_handler, 0);
1313 __ b(L, eq);
1314 __ verify_oop(R0);
1315 __ bind(L);
1316 }
1317 #endif // ASSERT
1318 #endif // AARCH64
1319
1320 // Restore FP/LR, sender_sp and return
1321 #ifdef AARCH64
1322 __ ldr(Rtemp, Address(FP, frame::interpreter_frame_sender_sp_offset * wordSize));
1323 __ ldp(FP, LR, Address(FP));
1324 __ mov(SP, Rtemp);
1325 #else
1326 __ mov(Rtemp, FP);
1327 __ ldmia(FP, RegisterSet(FP) | RegisterSet(LR));
1328 __ ldr(SP, Address(Rtemp, frame::interpreter_frame_sender_sp_offset * wordSize));
1329 #endif // AARCH64
1330
1331 __ ret();
1332
1333 if (inc_counter) {
1334 // Handle overflow of counter and compile method
1335 __ bind(invocation_counter_overflow);
1336 generate_counter_overflow(continue_after_compile);
1337 }
1338
1339 return entry_point;
1340 }
1341
1342 //
1343 // Generic interpreted method entry to (asm) interpreter
1344 //
1345 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1346 // determine code generation flags
1347 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1348
1349 // Rmethod: Method*
1350 // Rthread: thread
1351 // Rsender_sp: sender sp (could differ from SP if we were called via c2i)
1352 // Rparams: pointer to the last parameter in the stack
1353
1354 address entry_point = __ pc();
1355
1356 const Register RconstMethod = AARCH64_ONLY(R10) NOT_AARCH64(R3);
1357
1358 #ifdef AARCH64
1359 const Register RmaxStack = R11;
1360 const Register RlocalsBase = R12;
1361 #endif // AARCH64
1362
1363 __ ldr(RconstMethod, Address(Rmethod, Method::const_offset()));
1364
1365 __ ldrh(R2, Address(RconstMethod, ConstMethod::size_of_parameters_offset()));
1366 __ ldrh(R3, Address(RconstMethod, ConstMethod::size_of_locals_offset()));
1367
1368 // setup Rlocals
1369 __ sub(Rlocals, Rparams, wordSize);
1370 __ add(Rlocals, Rlocals, AsmOperand(R2, lsl, Interpreter::logStackElementSize));
1371
1372 __ sub(R3, R3, R2); // number of additional locals
1373
1374 #ifdef AARCH64
1375 // setup RmaxStack
1376 __ ldrh(RmaxStack, Address(RconstMethod, ConstMethod::max_stack_offset()));
1377 // We have to add extra reserved slots to max_stack. There are 3 users of the extra slots,
1378 // none of which are at the same time, so we just need to make sure there is enough room
1379 // for the biggest user:
1380 // -reserved slot for exception handler
1381 // -reserved slots for JSR292. Method::extra_stack_entries() is the size.
1382 // -3 reserved slots so get_method_counters() can save some registers before call_VM().
1383 __ add(RmaxStack, RmaxStack, MAX2(3, Method::extra_stack_entries()));
1384 #endif // AARCH64
1385
1386 // see if we've got enough room on the stack for locals plus overhead.
1387 generate_stack_overflow_check();
1388
1389 #ifdef AARCH64
1390
1391 // allocate space for locals
1392 {
1393 __ sub(RlocalsBase, Rparams, AsmOperand(R3, lsl, Interpreter::logStackElementSize));
1394 __ align_reg(SP, RlocalsBase, StackAlignmentInBytes);
1395 }
1396
1397 // explicitly initialize locals
1398 {
1399 Label zero_loop, done;
1400 __ cbz(R3, done);
1401
1402 __ tbz(R3, 0, zero_loop);
1403 __ subs(R3, R3, 1);
1404 __ str(ZR, Address(RlocalsBase, wordSize, post_indexed));
1405 __ b(done, eq);
1406
1407 __ bind(zero_loop);
1408 __ subs(R3, R3, 2);
1409 __ stp(ZR, ZR, Address(RlocalsBase, 2*wordSize, post_indexed));
1410 __ b(zero_loop, ne);
1411
1412 __ bind(done);
1413 }
1414
1415 #else
1416 // allocate space for locals
1417 // explicitly initialize locals
1418
1419 // Loop is unrolled 4 times
1420 Label loop;
1421 __ mov(R0, 0);
1422 __ bind(loop);
1423
1424 // #1
1425 __ subs(R3, R3, 1);
1426 __ push(R0, ge);
1427
1428 // #2
1429 __ subs(R3, R3, 1, ge);
1430 __ push(R0, ge);
1431
1432 // #3
1433 __ subs(R3, R3, 1, ge);
1434 __ push(R0, ge);
1435
1436 // #4
1437 __ subs(R3, R3, 1, ge);
1438 __ push(R0, ge);
1439
1440 __ b(loop, gt);
1441 #endif // AARCH64
1442
1443 // initialize fixed part of activation frame
1444 generate_fixed_frame(false);
1445
1446 __ restore_dispatch();
1447
1448 // make sure method is not native & not abstract
1449 #ifdef ASSERT
1450 __ ldr_u32(Rtemp, Address(Rmethod, Method::access_flags_offset()));
1451 {
1452 Label L;
1453 __ tbz(Rtemp, JVM_ACC_NATIVE_BIT, L);
1454 __ stop("tried to execute native method as non-native");
1455 __ bind(L);
1456 }
1457 { Label L;
1458 __ tbz(Rtemp, JVM_ACC_ABSTRACT_BIT, L);
1459 __ stop("tried to execute abstract method in interpreter");
1460 __ bind(L);
1461 }
1462 #endif
1463
1464 // increment invocation count & check for overflow
1465 Label invocation_counter_overflow;
1466 Label profile_method;
1467 Label profile_method_continue;
1468 if (inc_counter) {
1469 if (synchronized) {
1470 // Avoid unlocking method's monitor in case of exception, as it has not
1471 // been locked yet.
1472 __ set_do_not_unlock_if_synchronized(true, Rtemp);
1473 }
1474 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1475 if (ProfileInterpreter) {
1476 __ bind(profile_method_continue);
1477 }
1478 }
1479 Label continue_after_compile;
1480 __ bind(continue_after_compile);
1481
1482 if (inc_counter && synchronized) {
1483 __ set_do_not_unlock_if_synchronized(false, Rtemp);
1484 }
1485 #if R9_IS_SCRATCHED
1486 __ restore_method();
1487 #endif
1488
1489 // check for synchronized methods
1490 // Must happen AFTER invocation_counter check and stack overflow check,
1491 // so method is not locked if overflows.
1492 //
1493 if (synchronized) {
1494 // Allocate monitor and lock method
1495 lock_method();
1496 } else {
1497 // no synchronization necessary
1498 #ifdef ASSERT
1499 { Label L;
1500 __ ldr_u32(Rtemp, Address(Rmethod, Method::access_flags_offset()));
1501 __ tbz(Rtemp, JVM_ACC_SYNCHRONIZED_BIT, L);
1502 __ stop("method needs synchronization");
1503 __ bind(L);
1504 }
1505 #endif
1506 }
1507
1508 // start execution
1509 #ifdef ASSERT
1510 { Label L;
1511 __ ldr(Rtemp, Address(FP, frame::interpreter_frame_monitor_block_top_offset * wordSize));
1512 __ cmp(Rtemp, Rstack_top);
1513 __ b(L, eq);
1514 __ stop("broken stack frame setup in interpreter");
1515 __ bind(L);
1516 }
1517 #endif
1518 __ check_extended_sp(Rtemp);
1519
1520 // jvmti support
1521 __ notify_method_entry();
1522 #if R9_IS_SCRATCHED
1523 __ restore_method();
1524 #endif
1525
1526 __ dispatch_next(vtos);
1527
1528 // invocation counter overflow
1529 if (inc_counter) {
1530 if (ProfileInterpreter) {
1531 // We have decided to profile this method in the interpreter
1532 __ bind(profile_method);
1533
1534 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1535 __ set_method_data_pointer_for_bcp();
1536
1537 __ b(profile_method_continue);
1538 }
1539
1540 // Handle overflow of counter and compile method
1541 __ bind(invocation_counter_overflow);
1542 generate_counter_overflow(continue_after_compile);
1543 }
1544
1545 return entry_point;
1546 }
1547
1548 //------------------------------------------------------------------------------------------------------------------------
1549 // Exceptions
1550
1551 void TemplateInterpreterGenerator::generate_throw_exception() {
1552 // Entry point in previous activation (i.e., if the caller was interpreted)
1553 Interpreter::_rethrow_exception_entry = __ pc();
1554 // Rexception_obj: exception
1555
1556 #ifndef AARCH64
1557 // Clear interpreter_frame_last_sp.
1558 __ mov(Rtemp, 0);
1559 __ str(Rtemp, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
1560 #endif // !AARCH64
1561
1562 #if R9_IS_SCRATCHED
1563 __ restore_method();
1564 #endif
1565 __ restore_bcp();
1566 __ restore_dispatch();
1567 __ restore_locals();
1568
1569 #ifdef AARCH64
1570 __ restore_sp_after_call(Rtemp);
1571 #endif // AARCH64
1572
1573 // Entry point for exceptions thrown within interpreter code
1574 Interpreter::_throw_exception_entry = __ pc();
1575
1576 // expression stack is undefined here
1577 // Rexception_obj: exception
1578 // Rbcp: exception bcp
1579 __ verify_oop(Rexception_obj);
1580
1581 // expression stack must be empty before entering the VM in case of an exception
1582 __ empty_expression_stack();
1583 // find exception handler address and preserve exception oop
1584 __ mov(R1, Rexception_obj);
1585 __ call_VM(Rexception_obj, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), R1);
1586 // R0: exception handler entry point
1587 // Rexception_obj: preserved exception oop
1588 // Rbcp: bcp for exception handler
1589 __ push_ptr(Rexception_obj); // push exception which is now the only value on the stack
1590 __ jump(R0); // jump to exception handler (may be _remove_activation_entry!)
1591
1592 // If the exception is not handled in the current frame the frame is removed and
1593 // the exception is rethrown (i.e. exception continuation is _rethrow_exception).
1594 //
1595 // Note: At this point the bci is still the bxi for the instruction which caused
1596 // the exception and the expression stack is empty. Thus, for any VM calls
1597 // at this point, GC will find a legal oop map (with empty expression stack).
1598
1599 // In current activation
1600 // tos: exception
1601 // Rbcp: exception bcp
1602
1603 //
1604 // JVMTI PopFrame support
1605 //
1606 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1607
1608 #ifdef AARCH64
1609 __ restore_sp_after_call(Rtemp); // restore SP to extended SP
1610 #endif // AARCH64
1611
1612 __ empty_expression_stack();
1613
1614 // Set the popframe_processing bit in _popframe_condition indicating that we are
1615 // currently handling popframe, so that call_VMs that may happen later do not trigger new
1616 // popframe handling cycles.
1617
1618 __ ldr_s32(Rtemp, Address(Rthread, JavaThread::popframe_condition_offset()));
1619 __ orr(Rtemp, Rtemp, (unsigned)JavaThread::popframe_processing_bit);
1620 __ str_32(Rtemp, Address(Rthread, JavaThread::popframe_condition_offset()));
1621
1622 {
1623 // Check to see whether we are returning to a deoptimized frame.
1624 // (The PopFrame call ensures that the caller of the popped frame is
1625 // either interpreted or compiled and deoptimizes it if compiled.)
1626 // In this case, we can't call dispatch_next() after the frame is
1627 // popped, but instead must save the incoming arguments and restore
1628 // them after deoptimization has occurred.
1629 //
1630 // Note that we don't compare the return PC against the
1631 // deoptimization blob's unpack entry because of the presence of
1632 // adapter frames in C2.
1633 Label caller_not_deoptimized;
1634 __ ldr(R0, Address(FP, frame::return_addr_offset * wordSize));
1635 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), R0);
1636 __ cbnz_32(R0, caller_not_deoptimized);
1637 #ifdef AARCH64
1638 __ NOT_TESTED();
1639 #endif
1640
1641 // Compute size of arguments for saving when returning to deoptimized caller
1642 __ restore_method();
1643 __ ldr(R0, Address(Rmethod, Method::const_offset()));
1644 __ ldrh(R0, Address(R0, ConstMethod::size_of_parameters_offset()));
1645
1646 __ logical_shift_left(R1, R0, Interpreter::logStackElementSize);
1647 // Save these arguments
1648 __ restore_locals();
1649 __ sub(R2, Rlocals, R1);
1650 __ add(R2, R2, wordSize);
1651 __ mov(R0, Rthread);
1652 __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), R0, R1, R2);
1653
1654 __ remove_activation(vtos, LR,
1655 /* throw_monitor_exception */ false,
1656 /* install_monitor_exception */ false,
1657 /* notify_jvmdi */ false);
1658
1659 // Inform deoptimization that it is responsible for restoring these arguments
1660 __ mov(Rtemp, JavaThread::popframe_force_deopt_reexecution_bit);
1661 __ str_32(Rtemp, Address(Rthread, JavaThread::popframe_condition_offset()));
1662
1663 // Continue in deoptimization handler
1664 __ ret();
1665
1666 __ bind(caller_not_deoptimized);
1667 }
1668
1669 __ remove_activation(vtos, R4,
1670 /* throw_monitor_exception */ false,
1671 /* install_monitor_exception */ false,
1672 /* notify_jvmdi */ false);
1673
1674 #ifndef AARCH64
1675 // Finish with popframe handling
1676 // A previous I2C followed by a deoptimization might have moved the
1677 // outgoing arguments further up the stack. PopFrame expects the
1678 // mutations to those outgoing arguments to be preserved and other
1679 // constraints basically require this frame to look exactly as
1680 // though it had previously invoked an interpreted activation with
1681 // no space between the top of the expression stack (current
1682 // last_sp) and the top of stack. Rather than force deopt to
1683 // maintain this kind of invariant all the time we call a small
1684 // fixup routine to move the mutated arguments onto the top of our
1685 // expression stack if necessary.
1686 __ mov(R1, SP);
1687 __ ldr(R2, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
1688 // PC must point into interpreter here
1689 __ set_last_Java_frame(SP, FP, true, Rtemp);
1690 __ mov(R0, Rthread);
1691 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), R0, R1, R2);
1692 __ reset_last_Java_frame(Rtemp);
1693 #endif // !AARCH64
1694
1695 #ifdef AARCH64
1696 __ restore_sp_after_call(Rtemp);
1697 __ restore_stack_top();
1698 #else
1699 // Restore the last_sp and null it out
1700 __ ldr(SP, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
1701 __ mov(Rtemp, (int)NULL_WORD);
1702 __ str(Rtemp, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
1703 #endif // AARCH64
1704
1705 __ restore_bcp();
1706 __ restore_dispatch();
1707 __ restore_locals();
1708 __ restore_method();
1709
1710 // The method data pointer was incremented already during
1711 // call profiling. We have to restore the mdp for the current bcp.
1712 if (ProfileInterpreter) {
1713 __ set_method_data_pointer_for_bcp();
1714 }
1715
1716 // Clear the popframe condition flag
1717 assert(JavaThread::popframe_inactive == 0, "adjust this code");
1718 __ str_32(__ zero_register(Rtemp), Address(Rthread, JavaThread::popframe_condition_offset()));
1719
1720 #if INCLUDE_JVMTI
1721 {
1722 Label L_done;
1723
1724 __ ldrb(Rtemp, Address(Rbcp, 0));
1725 __ cmp(Rtemp, Bytecodes::_invokestatic);
1726 __ b(L_done, ne);
1727
1728 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1729 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1730
1731 // get local0
1732 __ ldr(R1, Address(Rlocals, 0));
1733 __ mov(R2, Rmethod);
1734 __ mov(R3, Rbcp);
1735 __ call_VM(R0, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), R1, R2, R3);
1736
1737 __ cbz(R0, L_done);
1738
1739 __ str(R0, Address(Rstack_top));
1740 __ bind(L_done);
1741 }
1742 #endif // INCLUDE_JVMTI
1743
1744 __ dispatch_next(vtos);
1745 // end of PopFrame support
1746
1747 Interpreter::_remove_activation_entry = __ pc();
1748
1749 // preserve exception over this code sequence
1750 __ pop_ptr(R0_tos);
1751 __ str(R0_tos, Address(Rthread, JavaThread::vm_result_offset()));
1752 // remove the activation (without doing throws on illegalMonitorExceptions)
1753 __ remove_activation(vtos, Rexception_pc, false, true, false);
1754 // restore exception
1755 __ get_vm_result(Rexception_obj, Rtemp);
1756
1757 // Inbetween activations - previous activation type unknown yet
1758 // compute continuation point - the continuation point expects
1759 // the following registers set up:
1760 //
1761 // Rexception_obj: exception
1762 // Rexception_pc: return address/pc that threw exception
1763 // SP: expression stack of caller
1764 // FP: frame pointer of caller
1765 __ mov(c_rarg0, Rthread);
1766 __ mov(c_rarg1, Rexception_pc);
1767 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), c_rarg0, c_rarg1);
1768 // Note that an "issuing PC" is actually the next PC after the call
1769
1770 __ jump(R0); // jump to exception handler of caller
1771 }
1772
1773
1774 //
1775 // JVMTI ForceEarlyReturn support
1776 //
1777 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1778 address entry = __ pc();
1779
1780 #ifdef AARCH64
1781 __ restore_sp_after_call(Rtemp); // restore SP to extended SP
1782 #endif // AARCH64
1783
1784 __ restore_bcp();
1785 __ restore_dispatch();
1786 __ restore_locals();
1787
1788 __ empty_expression_stack();
1789
1790 __ load_earlyret_value(state);
1791
1792 // Clear the earlyret state
1793 __ ldr(Rtemp, Address(Rthread, JavaThread::jvmti_thread_state_offset()));
1794
1795 assert(JvmtiThreadState::earlyret_inactive == 0, "adjust this code");
1796 __ str_32(__ zero_register(R2), Address(Rtemp, JvmtiThreadState::earlyret_state_offset()));
1797
1798 __ remove_activation(state, LR,
1799 false, /* throw_monitor_exception */
1800 false, /* install_monitor_exception */
1801 true); /* notify_jvmdi */
1802
1803 #ifndef AARCH64
1804 // According to interpreter calling conventions, result is returned in R0/R1,
1805 // so ftos (S0) and dtos (D0) are moved to R0/R1.
1806 // This conversion should be done after remove_activation, as it uses
1807 // push(state) & pop(state) to preserve return value.
1808 __ convert_tos_to_retval(state);
1809 #endif // !AARCH64
1810 __ ret();
1811
1812 return entry;
1813 } // end of ForceEarlyReturn support
1814
1815
1816 //------------------------------------------------------------------------------------------------------------------------
1817 // Helper for vtos entry point generation
1818
1819 void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) {
1820 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1821 Label L;
1822
1823 #ifdef __SOFTFP__
1824 dep = __ pc(); // fall through
1825 #else
1826 fep = __ pc(); __ push(ftos); __ b(L);
1827 dep = __ pc(); __ push(dtos); __ b(L);
1828 #endif // __SOFTFP__
1829
1830 lep = __ pc(); __ push(ltos); __ b(L);
1831
1832 if (AARCH64_ONLY(true) NOT_AARCH64(VerifyOops)) { // can't share atos entry with itos on AArch64 or if VerifyOops
1833 aep = __ pc(); __ push(atos); __ b(L);
1834 } else {
1835 aep = __ pc(); // fall through
1836 }
1837
1838 #ifdef __SOFTFP__
1839 fep = __ pc(); // fall through
1840 #endif // __SOFTFP__
1841
1842 bep = cep = sep = // fall through
1843 iep = __ pc(); __ push(itos); // fall through
1844 vep = __ pc(); __ bind(L); // fall through
1845 generate_and_dispatch(t);
1846 }
1847
1848 //------------------------------------------------------------------------------------------------------------------------
1849
1850 // Non-product code
1851 #ifndef PRODUCT
1852 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1853 address entry = __ pc();
1854
1855 // prepare expression stack
1856 __ push(state); // save tosca
1857
1858 // pass tosca registers as arguments
1859 __ mov(R2, R0_tos);
1860 #ifdef AARCH64
1861 __ mov(R3, ZR);
1862 #else
1863 __ mov(R3, R1_tos_hi);
1864 #endif // AARCH64
1865 __ mov(R1, LR); // save return address
1866
1867 // call tracer
1868 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), R1, R2, R3);
1869
1870 __ mov(LR, R0); // restore return address
1871 __ pop(state); // restore tosca
1872
1873 // return
1874 __ ret();
1875
1876 return entry;
1877 }
1878
1879
1880 void TemplateInterpreterGenerator::count_bytecode() {
1881 __ inc_global_counter((address) &BytecodeCounter::_counter_value, 0, Rtemp, R2_tmp, true);
1882 }
1883
1884
1885 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1886 __ inc_global_counter((address)&BytecodeHistogram::_counters[0], sizeof(BytecodeHistogram::_counters[0]) * t->bytecode(), Rtemp, R2_tmp, true);
1887 }
1888
1889
1890 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1891 const Register Rindex_addr = R2_tmp;
1892 Label Lcontinue;
1893 InlinedAddress Lcounters((address)BytecodePairHistogram::_counters);
1894 InlinedAddress Lindex((address)&BytecodePairHistogram::_index);
1895 const Register Rcounters_addr = R2_tmp;
1896 const Register Rindex = R4_tmp;
1897
1898 // calculate new index for counter:
1899 // index = (_index >> log2_number_of_codes) | (bytecode << log2_number_of_codes).
1900 // (_index >> log2_number_of_codes) is previous bytecode
1901
1902 __ ldr_literal(Rindex_addr, Lindex);
1903 __ ldr_s32(Rindex, Address(Rindex_addr));
1904 __ mov_slow(Rtemp, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
1905 __ orr(Rindex, Rtemp, AsmOperand(Rindex, lsr, BytecodePairHistogram::log2_number_of_codes));
1906 __ str_32(Rindex, Address(Rindex_addr));
1907
1908 // Rindex (R4) contains index of counter
1909
1910 __ ldr_literal(Rcounters_addr, Lcounters);
1911 __ ldr_s32(Rtemp, Address::indexed_32(Rcounters_addr, Rindex));
1912 __ adds_32(Rtemp, Rtemp, 1);
1913 __ b(Lcontinue, mi); // avoid overflow
1914 __ str_32(Rtemp, Address::indexed_32(Rcounters_addr, Rindex));
1915
1916 __ b(Lcontinue);
1917
1918 __ bind_literal(Lindex);
1919 __ bind_literal(Lcounters);
1920
1921 __ bind(Lcontinue);
1922 }
1923
1924
1925 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1926 // Call a little run-time stub to avoid blow-up for each bytecode.
1927 // The run-time runtime saves the right registers, depending on
1928 // the tosca in-state for the given template.
1929 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1930 "entry must have been generated");
1931 address trace_entry = Interpreter::trace_code(t->tos_in());
1932 __ call(trace_entry, relocInfo::none);
1933 }
1934
1935
1936 void TemplateInterpreterGenerator::stop_interpreter_at() {
1937 Label Lcontinue;
1938 const Register stop_at = R2_tmp;
1939
1940 __ ldr_global_s32(Rtemp, (address) &BytecodeCounter::_counter_value);
1941 __ mov_slow(stop_at, StopInterpreterAt);
1942
1943 // test bytecode counter
1944 __ cmp(Rtemp, stop_at);
1945 __ b(Lcontinue, ne);
1946
1947 __ trace_state("stop_interpreter_at");
1948 __ breakpoint();
1949
1950 __ bind(Lcontinue);
1951 }
1952 #endif // !PRODUCT