1 /*
2 * Copyright (c) 1997, 2010, 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 "interp_masm_sparc.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "interpreter/interpreterRuntime.hpp"
29 #include "oops/arrayOop.hpp"
30 #include "oops/markOop.hpp"
31 #include "oops/methodDataOop.hpp"
32 #include "oops/methodOop.hpp"
33 #include "prims/jvmtiExport.hpp"
34 #include "prims/jvmtiRedefineClassesTrace.hpp"
35 #include "prims/jvmtiThreadState.hpp"
36 #include "runtime/basicLock.hpp"
37 #include "runtime/biasedLocking.hpp"
38 #include "runtime/sharedRuntime.hpp"
39 #ifdef TARGET_OS_FAMILY_linux
40 # include "thread_linux.inline.hpp"
41 #endif
42 #ifdef TARGET_OS_FAMILY_solaris
43 # include "thread_solaris.inline.hpp"
44 #endif
45
46 #ifndef CC_INTERP
47 #ifndef FAST_DISPATCH
48 #define FAST_DISPATCH 1
49 #endif
50 #undef FAST_DISPATCH
51
52 // Implementation of InterpreterMacroAssembler
53
54 // This file specializes the assember with interpreter-specific macros
55
56 const Address InterpreterMacroAssembler::l_tmp(FP, (frame::interpreter_frame_l_scratch_fp_offset * wordSize) + STACK_BIAS);
57 const Address InterpreterMacroAssembler::d_tmp(FP, (frame::interpreter_frame_d_scratch_fp_offset * wordSize) + STACK_BIAS);
58
59 #else // CC_INTERP
60 #ifndef STATE
61 #define STATE(field_name) Lstate, in_bytes(byte_offset_of(BytecodeInterpreter, field_name))
62 #endif // STATE
63
64 #endif // CC_INTERP
65
66 void InterpreterMacroAssembler::compute_extra_locals_size_in_bytes(Register args_size, Register locals_size, Register delta) {
67 // Note: this algorithm is also used by C1's OSR entry sequence.
68 // Any changes should also be applied to CodeEmitter::emit_osr_entry().
69 assert_different_registers(args_size, locals_size);
70 // max_locals*2 for TAGS. Assumes that args_size has already been adjusted.
71 subcc(locals_size, args_size, delta);// extra space for non-arguments locals in words
72 // Use br/mov combination because it works on both V8 and V9 and is
73 // faster.
74 Label skip_move;
75 br(Assembler::negative, true, Assembler::pt, skip_move);
76 delayed()->mov(G0, delta);
77 bind(skip_move);
78 round_to(delta, WordsPerLong); // make multiple of 2 (SP must be 2-word aligned)
79 sll(delta, LogBytesPerWord, delta); // extra space for locals in bytes
80 }
81
82 #ifndef CC_INTERP
83
84 // Dispatch code executed in the prolog of a bytecode which does not do it's
85 // own dispatch. The dispatch address is computed and placed in IdispatchAddress
86 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int bcp_incr) {
87 assert_not_delayed();
88 #ifdef FAST_DISPATCH
89 // FAST_DISPATCH and ProfileInterpreter are mutually exclusive since
90 // they both use I2.
91 assert(!ProfileInterpreter, "FAST_DISPATCH and +ProfileInterpreter are mutually exclusive");
92 ldub(Lbcp, bcp_incr, Lbyte_code); // load next bytecode
93 add(Lbyte_code, Interpreter::distance_from_dispatch_table(state), Lbyte_code);
94 // add offset to correct dispatch table
95 sll(Lbyte_code, LogBytesPerWord, Lbyte_code); // multiply by wordSize
96 ld_ptr(IdispatchTables, Lbyte_code, IdispatchAddress);// get entry addr
97 #else
98 ldub( Lbcp, bcp_incr, Lbyte_code); // load next bytecode
99 // dispatch table to use
100 AddressLiteral tbl(Interpreter::dispatch_table(state));
101 sll(Lbyte_code, LogBytesPerWord, Lbyte_code); // multiply by wordSize
102 set(tbl, G3_scratch); // compute addr of table
103 ld_ptr(G3_scratch, Lbyte_code, IdispatchAddress); // get entry addr
104 #endif
105 }
106
107
108 // Dispatch code executed in the epilog of a bytecode which does not do it's
109 // own dispatch. The dispatch address in IdispatchAddress is used for the
110 // dispatch.
111 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int bcp_incr) {
112 assert_not_delayed();
113 verify_FPU(1, state);
114 interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
115 jmp( IdispatchAddress, 0 );
116 if (bcp_incr != 0) delayed()->inc(Lbcp, bcp_incr);
117 else delayed()->nop();
118 }
119
120
121 void InterpreterMacroAssembler::dispatch_next(TosState state, int bcp_incr) {
122 // %%%% consider branching to a single shared dispatch stub (for each bcp_incr)
123 assert_not_delayed();
124 ldub( Lbcp, bcp_incr, Lbyte_code); // load next bytecode
125 dispatch_Lbyte_code(state, Interpreter::dispatch_table(state), bcp_incr);
126 }
127
128
129 void InterpreterMacroAssembler::dispatch_next_noverify_oop(TosState state, int bcp_incr) {
130 // %%%% consider branching to a single shared dispatch stub (for each bcp_incr)
131 assert_not_delayed();
132 ldub( Lbcp, bcp_incr, Lbyte_code); // load next bytecode
133 dispatch_Lbyte_code(state, Interpreter::dispatch_table(state), bcp_incr, false);
134 }
135
136
137 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
138 // load current bytecode
139 assert_not_delayed();
140 ldub( Lbcp, 0, Lbyte_code); // load next bytecode
141 dispatch_base(state, table);
142 }
143
144
145 void InterpreterMacroAssembler::call_VM_leaf_base(
146 Register java_thread,
147 address entry_point,
148 int number_of_arguments
149 ) {
150 if (!java_thread->is_valid())
151 java_thread = L7_thread_cache;
152 // super call
153 MacroAssembler::call_VM_leaf_base(java_thread, entry_point, number_of_arguments);
154 }
155
156
157 void InterpreterMacroAssembler::call_VM_base(
158 Register oop_result,
159 Register java_thread,
160 Register last_java_sp,
161 address entry_point,
162 int number_of_arguments,
163 bool check_exception
164 ) {
165 if (!java_thread->is_valid())
166 java_thread = L7_thread_cache;
167 // See class ThreadInVMfromInterpreter, which assumes that the interpreter
168 // takes responsibility for setting its own thread-state on call-out.
169 // However, ThreadInVMfromInterpreter resets the state to "in_Java".
170
171 //save_bcp(); // save bcp
172 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exception);
173 //restore_bcp(); // restore bcp
174 //restore_locals(); // restore locals pointer
175 }
176
177
178 void InterpreterMacroAssembler::check_and_handle_popframe(Register scratch_reg) {
179 if (JvmtiExport::can_pop_frame()) {
180 Label L;
181
182 // Check the "pending popframe condition" flag in the current thread
183 ld(G2_thread, JavaThread::popframe_condition_offset(), scratch_reg);
184
185 // Initiate popframe handling only if it is not already being processed. If the flag
186 // has the popframe_processing bit set, it means that this code is called *during* popframe
187 // handling - we don't want to reenter.
188 btst(JavaThread::popframe_pending_bit, scratch_reg);
189 br(zero, false, pt, L);
190 delayed()->nop();
191 btst(JavaThread::popframe_processing_bit, scratch_reg);
192 br(notZero, false, pt, L);
193 delayed()->nop();
194
195 // Call Interpreter::remove_activation_preserving_args_entry() to get the
196 // address of the same-named entrypoint in the generated interpreter code.
197 call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
198
199 // Jump to Interpreter::_remove_activation_preserving_args_entry
200 jmpl(O0, G0, G0);
201 delayed()->nop();
202 bind(L);
203 }
204 }
205
206
207 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
208 Register thr_state = G4_scratch;
209 ld_ptr(G2_thread, JavaThread::jvmti_thread_state_offset(), thr_state);
210 const Address tos_addr(thr_state, JvmtiThreadState::earlyret_tos_offset());
211 const Address oop_addr(thr_state, JvmtiThreadState::earlyret_oop_offset());
212 const Address val_addr(thr_state, JvmtiThreadState::earlyret_value_offset());
213 switch (state) {
214 case ltos: ld_long(val_addr, Otos_l); break;
215 case atos: ld_ptr(oop_addr, Otos_l);
216 st_ptr(G0, oop_addr); break;
217 case btos: // fall through
218 case ctos: // fall through
219 case stos: // fall through
220 case itos: ld(val_addr, Otos_l1); break;
221 case ftos: ldf(FloatRegisterImpl::S, val_addr, Ftos_f); break;
222 case dtos: ldf(FloatRegisterImpl::D, val_addr, Ftos_d); break;
223 case vtos: /* nothing to do */ break;
224 default : ShouldNotReachHere();
225 }
226 // Clean up tos value in the jvmti thread state
227 or3(G0, ilgl, G3_scratch);
228 stw(G3_scratch, tos_addr);
229 st_long(G0, val_addr);
230 interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
231 }
232
233
234 void InterpreterMacroAssembler::check_and_handle_earlyret(Register scratch_reg) {
235 if (JvmtiExport::can_force_early_return()) {
236 Label L;
237 Register thr_state = G3_scratch;
238 ld_ptr(G2_thread, JavaThread::jvmti_thread_state_offset(), thr_state);
239 tst(thr_state);
240 br(zero, false, pt, L); // if (thread->jvmti_thread_state() == NULL) exit;
241 delayed()->nop();
242
243 // Initiate earlyret handling only if it is not already being processed.
244 // If the flag has the earlyret_processing bit set, it means that this code
245 // is called *during* earlyret handling - we don't want to reenter.
246 ld(thr_state, JvmtiThreadState::earlyret_state_offset(), G4_scratch);
247 cmp(G4_scratch, JvmtiThreadState::earlyret_pending);
248 br(Assembler::notEqual, false, pt, L);
249 delayed()->nop();
250
251 // Call Interpreter::remove_activation_early_entry() to get the address of the
252 // same-named entrypoint in the generated interpreter code
253 ld(thr_state, JvmtiThreadState::earlyret_tos_offset(), Otos_l1);
254 call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), Otos_l1);
255
256 // Jump to Interpreter::_remove_activation_early_entry
257 jmpl(O0, G0, G0);
258 delayed()->nop();
259 bind(L);
260 }
261 }
262
263
264 void InterpreterMacroAssembler::super_call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2) {
265 mov(arg_1, O0);
266 mov(arg_2, O1);
267 MacroAssembler::call_VM_leaf_base(thread_cache, entry_point, 2);
268 }
269 #endif /* CC_INTERP */
270
271
272 #ifndef CC_INTERP
273
274 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table) {
275 assert_not_delayed();
276 dispatch_Lbyte_code(state, table);
277 }
278
279
280 void InterpreterMacroAssembler::dispatch_normal(TosState state) {
281 dispatch_base(state, Interpreter::normal_table(state));
282 }
283
284
285 void InterpreterMacroAssembler::dispatch_only(TosState state) {
286 dispatch_base(state, Interpreter::dispatch_table(state));
287 }
288
289
290 // common code to dispatch and dispatch_only
291 // dispatch value in Lbyte_code and increment Lbcp
292
293 void InterpreterMacroAssembler::dispatch_Lbyte_code(TosState state, address* table, int bcp_incr, bool verify) {
294 verify_FPU(1, state);
295 // %%%%% maybe implement +VerifyActivationFrameSize here
296 //verify_thread(); //too slow; we will just verify on method entry & exit
297 if (verify) interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
298 #ifdef FAST_DISPATCH
299 if (table == Interpreter::dispatch_table(state)) {
300 // use IdispatchTables
301 add(Lbyte_code, Interpreter::distance_from_dispatch_table(state), Lbyte_code);
302 // add offset to correct dispatch table
303 sll(Lbyte_code, LogBytesPerWord, Lbyte_code); // multiply by wordSize
304 ld_ptr(IdispatchTables, Lbyte_code, G3_scratch); // get entry addr
305 } else {
306 #endif
307 // dispatch table to use
308 AddressLiteral tbl(table);
309 sll(Lbyte_code, LogBytesPerWord, Lbyte_code); // multiply by wordSize
310 set(tbl, G3_scratch); // compute addr of table
311 ld_ptr(G3_scratch, Lbyte_code, G3_scratch); // get entry addr
312 #ifdef FAST_DISPATCH
313 }
314 #endif
315 jmp( G3_scratch, 0 );
316 if (bcp_incr != 0) delayed()->inc(Lbcp, bcp_incr);
317 else delayed()->nop();
318 }
319
320
321 // Helpers for expression stack
322
323 // Longs and doubles are Category 2 computational types in the
324 // JVM specification (section 3.11.1) and take 2 expression stack or
325 // local slots.
326 // Aligning them on 32 bit with tagged stacks is hard because the code generated
327 // for the dup* bytecodes depends on what types are already on the stack.
328 // If the types are split into the two stack/local slots, that is much easier
329 // (and we can use 0 for non-reference tags).
330
331 // Known good alignment in _LP64 but unknown otherwise
332 void InterpreterMacroAssembler::load_unaligned_double(Register r1, int offset, FloatRegister d) {
333 assert_not_delayed();
334
335 #ifdef _LP64
336 ldf(FloatRegisterImpl::D, r1, offset, d);
337 #else
338 ldf(FloatRegisterImpl::S, r1, offset, d);
339 ldf(FloatRegisterImpl::S, r1, offset + Interpreter::stackElementSize, d->successor());
340 #endif
341 }
342
343 // Known good alignment in _LP64 but unknown otherwise
344 void InterpreterMacroAssembler::store_unaligned_double(FloatRegister d, Register r1, int offset) {
345 assert_not_delayed();
346
347 #ifdef _LP64
348 stf(FloatRegisterImpl::D, d, r1, offset);
349 // store something more useful here
350 debug_only(stx(G0, r1, offset+Interpreter::stackElementSize);)
351 #else
352 stf(FloatRegisterImpl::S, d, r1, offset);
353 stf(FloatRegisterImpl::S, d->successor(), r1, offset + Interpreter::stackElementSize);
354 #endif
355 }
356
357
358 // Known good alignment in _LP64 but unknown otherwise
359 void InterpreterMacroAssembler::load_unaligned_long(Register r1, int offset, Register rd) {
360 assert_not_delayed();
361 #ifdef _LP64
362 ldx(r1, offset, rd);
363 #else
364 ld(r1, offset, rd);
365 ld(r1, offset + Interpreter::stackElementSize, rd->successor());
366 #endif
367 }
368
369 // Known good alignment in _LP64 but unknown otherwise
370 void InterpreterMacroAssembler::store_unaligned_long(Register l, Register r1, int offset) {
371 assert_not_delayed();
372
373 #ifdef _LP64
374 stx(l, r1, offset);
375 // store something more useful here
376 debug_only(stx(G0, r1, offset+Interpreter::stackElementSize);)
377 #else
378 st(l, r1, offset);
379 st(l->successor(), r1, offset + Interpreter::stackElementSize);
380 #endif
381 }
382
383 void InterpreterMacroAssembler::pop_i(Register r) {
384 assert_not_delayed();
385 ld(Lesp, Interpreter::expr_offset_in_bytes(0), r);
386 inc(Lesp, Interpreter::stackElementSize);
387 debug_only(verify_esp(Lesp));
388 }
389
390 void InterpreterMacroAssembler::pop_ptr(Register r, Register scratch) {
391 assert_not_delayed();
392 ld_ptr(Lesp, Interpreter::expr_offset_in_bytes(0), r);
393 inc(Lesp, Interpreter::stackElementSize);
394 debug_only(verify_esp(Lesp));
395 }
396
397 void InterpreterMacroAssembler::pop_l(Register r) {
398 assert_not_delayed();
399 load_unaligned_long(Lesp, Interpreter::expr_offset_in_bytes(0), r);
400 inc(Lesp, 2*Interpreter::stackElementSize);
401 debug_only(verify_esp(Lesp));
402 }
403
404
405 void InterpreterMacroAssembler::pop_f(FloatRegister f, Register scratch) {
406 assert_not_delayed();
407 ldf(FloatRegisterImpl::S, Lesp, Interpreter::expr_offset_in_bytes(0), f);
408 inc(Lesp, Interpreter::stackElementSize);
409 debug_only(verify_esp(Lesp));
410 }
411
412
413 void InterpreterMacroAssembler::pop_d(FloatRegister f, Register scratch) {
414 assert_not_delayed();
415 load_unaligned_double(Lesp, Interpreter::expr_offset_in_bytes(0), f);
416 inc(Lesp, 2*Interpreter::stackElementSize);
417 debug_only(verify_esp(Lesp));
418 }
419
420
421 void InterpreterMacroAssembler::push_i(Register r) {
422 assert_not_delayed();
423 debug_only(verify_esp(Lesp));
424 st(r, Lesp, 0);
425 dec(Lesp, Interpreter::stackElementSize);
426 }
427
428 void InterpreterMacroAssembler::push_ptr(Register r) {
429 assert_not_delayed();
430 st_ptr(r, Lesp, 0);
431 dec(Lesp, Interpreter::stackElementSize);
432 }
433
434 // remember: our convention for longs in SPARC is:
435 // O0 (Otos_l1) has high-order part in first word,
436 // O1 (Otos_l2) has low-order part in second word
437
438 void InterpreterMacroAssembler::push_l(Register r) {
439 assert_not_delayed();
440 debug_only(verify_esp(Lesp));
441 // Longs are stored in memory-correct order, even if unaligned.
442 int offset = -Interpreter::stackElementSize;
443 store_unaligned_long(r, Lesp, offset);
444 dec(Lesp, 2 * Interpreter::stackElementSize);
445 }
446
447
448 void InterpreterMacroAssembler::push_f(FloatRegister f) {
449 assert_not_delayed();
450 debug_only(verify_esp(Lesp));
451 stf(FloatRegisterImpl::S, f, Lesp, 0);
452 dec(Lesp, Interpreter::stackElementSize);
453 }
454
455
456 void InterpreterMacroAssembler::push_d(FloatRegister d) {
457 assert_not_delayed();
458 debug_only(verify_esp(Lesp));
459 // Longs are stored in memory-correct order, even if unaligned.
460 int offset = -Interpreter::stackElementSize;
461 store_unaligned_double(d, Lesp, offset);
462 dec(Lesp, 2 * Interpreter::stackElementSize);
463 }
464
465
466 void InterpreterMacroAssembler::push(TosState state) {
467 interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
468 switch (state) {
469 case atos: push_ptr(); break;
470 case btos: push_i(); break;
471 case ctos:
472 case stos: push_i(); break;
473 case itos: push_i(); break;
474 case ltos: push_l(); break;
475 case ftos: push_f(); break;
476 case dtos: push_d(); break;
477 case vtos: /* nothing to do */ break;
478 default : ShouldNotReachHere();
479 }
480 }
481
482
483 void InterpreterMacroAssembler::pop(TosState state) {
484 switch (state) {
485 case atos: pop_ptr(); break;
486 case btos: pop_i(); break;
487 case ctos:
488 case stos: pop_i(); break;
489 case itos: pop_i(); break;
490 case ltos: pop_l(); break;
491 case ftos: pop_f(); break;
492 case dtos: pop_d(); break;
493 case vtos: /* nothing to do */ break;
494 default : ShouldNotReachHere();
495 }
496 interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
497 }
498
499
500 // Helpers for swap and dup
501 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
502 ld_ptr(Lesp, Interpreter::expr_offset_in_bytes(n), val);
503 }
504 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
505 st_ptr(val, Lesp, Interpreter::expr_offset_in_bytes(n));
506 }
507
508
509 void InterpreterMacroAssembler::load_receiver(Register param_count,
510 Register recv) {
511 sll(param_count, Interpreter::logStackElementSize, param_count);
512 ld_ptr(Lesp, param_count, recv); // gets receiver Oop
513 }
514
515 void InterpreterMacroAssembler::empty_expression_stack() {
516 // Reset Lesp.
517 sub( Lmonitors, wordSize, Lesp );
518
519 // Reset SP by subtracting more space from Lesp.
520 Label done;
521 verify_oop(Lmethod);
522 assert(G4_scratch != Gframe_size, "Only you can prevent register aliasing!");
523
524 // A native does not need to do this, since its callee does not change SP.
525 ld(Lmethod, methodOopDesc::access_flags_offset(), Gframe_size); // Load access flags.
526 btst(JVM_ACC_NATIVE, Gframe_size);
527 br(Assembler::notZero, false, Assembler::pt, done);
528 delayed()->nop();
529
530 // Compute max expression stack+register save area
531 lduh(Lmethod, in_bytes(methodOopDesc::max_stack_offset()), Gframe_size); // Load max stack.
532 add( Gframe_size, frame::memory_parameter_word_sp_offset, Gframe_size );
533
534 //
535 // now set up a stack frame with the size computed above
536 //
537 //round_to( Gframe_size, WordsPerLong ); // -- moved down to the "and" below
538 sll( Gframe_size, LogBytesPerWord, Gframe_size );
539 sub( Lesp, Gframe_size, Gframe_size );
540 and3( Gframe_size, -(2 * wordSize), Gframe_size ); // align SP (downwards) to an 8/16-byte boundary
541 debug_only(verify_sp(Gframe_size, G4_scratch));
542 #ifdef _LP64
543 sub(Gframe_size, STACK_BIAS, Gframe_size );
544 #endif
545 mov(Gframe_size, SP);
546
547 bind(done);
548 }
549
550
551 #ifdef ASSERT
552 void InterpreterMacroAssembler::verify_sp(Register Rsp, Register Rtemp) {
553 Label Bad, OK;
554
555 // Saved SP must be aligned.
556 #ifdef _LP64
557 btst(2*BytesPerWord-1, Rsp);
558 #else
559 btst(LongAlignmentMask, Rsp);
560 #endif
561 br(Assembler::notZero, false, Assembler::pn, Bad);
562 delayed()->nop();
563
564 // Saved SP, plus register window size, must not be above FP.
565 add(Rsp, frame::register_save_words * wordSize, Rtemp);
566 #ifdef _LP64
567 sub(Rtemp, STACK_BIAS, Rtemp); // Bias Rtemp before cmp to FP
568 #endif
569 cmp(Rtemp, FP);
570 brx(Assembler::greaterUnsigned, false, Assembler::pn, Bad);
571 delayed()->nop();
572
573 // Saved SP must not be ridiculously below current SP.
574 size_t maxstack = MAX2(JavaThread::stack_size_at_create(), (size_t) 4*K*K);
575 set(maxstack, Rtemp);
576 sub(SP, Rtemp, Rtemp);
577 #ifdef _LP64
578 add(Rtemp, STACK_BIAS, Rtemp); // Unbias Rtemp before cmp to Rsp
579 #endif
580 cmp(Rsp, Rtemp);
581 brx(Assembler::lessUnsigned, false, Assembler::pn, Bad);
582 delayed()->nop();
583
584 br(Assembler::always, false, Assembler::pn, OK);
585 delayed()->nop();
586
587 bind(Bad);
588 stop("on return to interpreted call, restored SP is corrupted");
589
590 bind(OK);
591 }
592
593
594 void InterpreterMacroAssembler::verify_esp(Register Resp) {
595 // about to read or write Resp[0]
596 // make sure it is not in the monitors or the register save area
597 Label OK1, OK2;
598
599 cmp(Resp, Lmonitors);
600 brx(Assembler::lessUnsigned, true, Assembler::pt, OK1);
601 delayed()->sub(Resp, frame::memory_parameter_word_sp_offset * wordSize, Resp);
602 stop("too many pops: Lesp points into monitor area");
603 bind(OK1);
604 #ifdef _LP64
605 sub(Resp, STACK_BIAS, Resp);
606 #endif
607 cmp(Resp, SP);
608 brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, OK2);
609 delayed()->add(Resp, STACK_BIAS + frame::memory_parameter_word_sp_offset * wordSize, Resp);
610 stop("too many pushes: Lesp points into register window");
611 bind(OK2);
612 }
613 #endif // ASSERT
614
615 // Load compiled (i2c) or interpreter entry when calling from interpreted and
616 // do the call. Centralized so that all interpreter calls will do the same actions.
617 // If jvmti single stepping is on for a thread we must not call compiled code.
618 void InterpreterMacroAssembler::call_from_interpreter(Register target, Register scratch, Register Rret) {
619
620 // Assume we want to go compiled if available
621
622 ld_ptr(G5_method, in_bytes(methodOopDesc::from_interpreted_offset()), target);
623
624 if (JvmtiExport::can_post_interpreter_events()) {
625 // JVMTI events, such as single-stepping, are implemented partly by avoiding running
626 // compiled code in threads for which the event is enabled. Check here for
627 // interp_only_mode if these events CAN be enabled.
628 verify_thread();
629 Label skip_compiled_code;
630
631 const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset());
632 ld(interp_only, scratch);
633 tst(scratch);
634 br(Assembler::notZero, true, Assembler::pn, skip_compiled_code);
635 delayed()->ld_ptr(G5_method, in_bytes(methodOopDesc::interpreter_entry_offset()), target);
636 bind(skip_compiled_code);
637 }
638
639 // the i2c_adapters need methodOop in G5_method (right? %%%)
640 // do the call
641 #ifdef ASSERT
642 {
643 Label ok;
644 br_notnull(target, false, Assembler::pt, ok);
645 delayed()->nop();
646 stop("null entry point");
647 bind(ok);
648 }
649 #endif // ASSERT
650
651 // Adjust Rret first so Llast_SP can be same as Rret
652 add(Rret, -frame::pc_return_offset, O7);
653 add(Lesp, BytesPerWord, Gargs); // setup parameter pointer
654 // Record SP so we can remove any stack space allocated by adapter transition
655 jmp(target, 0);
656 delayed()->mov(SP, Llast_SP);
657 }
658
659 void InterpreterMacroAssembler::if_cmp(Condition cc, bool ptr_compare) {
660 assert_not_delayed();
661
662 Label not_taken;
663 if (ptr_compare) brx(cc, false, Assembler::pn, not_taken);
664 else br (cc, false, Assembler::pn, not_taken);
665 delayed()->nop();
666
667 TemplateTable::branch(false,false);
668
669 bind(not_taken);
670
671 profile_not_taken_branch(G3_scratch);
672 }
673
674
675 void InterpreterMacroAssembler::get_2_byte_integer_at_bcp(
676 int bcp_offset,
677 Register Rtmp,
678 Register Rdst,
679 signedOrNot is_signed,
680 setCCOrNot should_set_CC ) {
681 assert(Rtmp != Rdst, "need separate temp register");
682 assert_not_delayed();
683 switch (is_signed) {
684 default: ShouldNotReachHere();
685
686 case Signed: ldsb( Lbcp, bcp_offset, Rdst ); break; // high byte
687 case Unsigned: ldub( Lbcp, bcp_offset, Rdst ); break; // high byte
688 }
689 ldub( Lbcp, bcp_offset + 1, Rtmp ); // low byte
690 sll( Rdst, BitsPerByte, Rdst);
691 switch (should_set_CC ) {
692 default: ShouldNotReachHere();
693
694 case set_CC: orcc( Rdst, Rtmp, Rdst ); break;
695 case dont_set_CC: or3( Rdst, Rtmp, Rdst ); break;
696 }
697 }
698
699
700 void InterpreterMacroAssembler::get_4_byte_integer_at_bcp(
701 int bcp_offset,
702 Register Rtmp,
703 Register Rdst,
704 setCCOrNot should_set_CC ) {
705 assert(Rtmp != Rdst, "need separate temp register");
706 assert_not_delayed();
707 add( Lbcp, bcp_offset, Rtmp);
708 andcc( Rtmp, 3, G0);
709 Label aligned;
710 switch (should_set_CC ) {
711 default: ShouldNotReachHere();
712
713 case set_CC: break;
714 case dont_set_CC: break;
715 }
716
717 br(Assembler::zero, true, Assembler::pn, aligned);
718 #ifdef _LP64
719 delayed()->ldsw(Rtmp, 0, Rdst);
720 #else
721 delayed()->ld(Rtmp, 0, Rdst);
722 #endif
723
724 ldub(Lbcp, bcp_offset + 3, Rdst);
725 ldub(Lbcp, bcp_offset + 2, Rtmp); sll(Rtmp, 8, Rtmp); or3(Rtmp, Rdst, Rdst);
726 ldub(Lbcp, bcp_offset + 1, Rtmp); sll(Rtmp, 16, Rtmp); or3(Rtmp, Rdst, Rdst);
727 #ifdef _LP64
728 ldsb(Lbcp, bcp_offset + 0, Rtmp); sll(Rtmp, 24, Rtmp);
729 #else
730 // Unsigned load is faster than signed on some implementations
731 ldub(Lbcp, bcp_offset + 0, Rtmp); sll(Rtmp, 24, Rtmp);
732 #endif
733 or3(Rtmp, Rdst, Rdst );
734
735 bind(aligned);
736 if (should_set_CC == set_CC) tst(Rdst);
737 }
738
739
740 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register cache, Register tmp,
741 int bcp_offset, size_t index_size) {
742 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
743 if (index_size == sizeof(u2)) {
744 get_2_byte_integer_at_bcp(bcp_offset, cache, tmp, Unsigned);
745 } else if (index_size == sizeof(u4)) {
746 assert(EnableInvokeDynamic, "giant index used only for EnableInvokeDynamic");
747 get_4_byte_integer_at_bcp(bcp_offset, cache, tmp);
748 assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line");
749 xor3(tmp, -1, tmp); // convert to plain index
750 } else if (index_size == sizeof(u1)) {
751 assert(EnableMethodHandles, "tiny index used only for EnableMethodHandles");
752 ldub(Lbcp, bcp_offset, tmp);
753 } else {
754 ShouldNotReachHere();
755 }
756 }
757
758
759 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register tmp,
760 int bcp_offset, size_t index_size) {
761 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
762 assert_different_registers(cache, tmp);
763 assert_not_delayed();
764 get_cache_index_at_bcp(cache, tmp, bcp_offset, index_size);
765 // convert from field index to ConstantPoolCacheEntry index and from
766 // word index to byte offset
767 sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
768 add(LcpoolCache, tmp, cache);
769 }
770
771
772 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp,
773 int bcp_offset, size_t index_size) {
774 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
775 assert_different_registers(cache, tmp);
776 assert_not_delayed();
777 if (index_size == sizeof(u2)) {
778 get_2_byte_integer_at_bcp(bcp_offset, cache, tmp, Unsigned);
779 } else {
780 ShouldNotReachHere(); // other sizes not supported here
781 }
782 // convert from field index to ConstantPoolCacheEntry index
783 // and from word index to byte offset
784 sll(tmp, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord), tmp);
785 // skip past the header
786 add(tmp, in_bytes(constantPoolCacheOopDesc::base_offset()), tmp);
787 // construct pointer to cache entry
788 add(LcpoolCache, tmp, cache);
789 }
790
791
792 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
793 // a subtype of super_klass. Blows registers Rsuper_klass, Rsub_klass, tmp1, tmp2.
794 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
795 Register Rsuper_klass,
796 Register Rtmp1,
797 Register Rtmp2,
798 Register Rtmp3,
799 Label &ok_is_subtype ) {
800 Label not_subtype;
801
802 // Profile the not-null value's klass.
803 profile_typecheck(Rsub_klass, Rtmp1);
804
805 check_klass_subtype_fast_path(Rsub_klass, Rsuper_klass,
806 Rtmp1, Rtmp2,
807 &ok_is_subtype, ¬_subtype, NULL);
808
809 check_klass_subtype_slow_path(Rsub_klass, Rsuper_klass,
810 Rtmp1, Rtmp2, Rtmp3, /*hack:*/ noreg,
811 &ok_is_subtype, NULL);
812
813 bind(not_subtype);
814 profile_typecheck_failed(Rtmp1);
815 }
816
817 // Separate these two to allow for delay slot in middle
818 // These are used to do a test and full jump to exception-throwing code.
819
820 // %%%%% Could possibly reoptimize this by testing to see if could use
821 // a single conditional branch (i.e. if span is small enough.
822 // If you go that route, than get rid of the split and give up
823 // on the delay-slot hack.
824
825 void InterpreterMacroAssembler::throw_if_not_1_icc( Condition ok_condition,
826 Label& ok ) {
827 assert_not_delayed();
828 br(ok_condition, true, pt, ok);
829 // DELAY SLOT
830 }
831
832 void InterpreterMacroAssembler::throw_if_not_1_xcc( Condition ok_condition,
833 Label& ok ) {
834 assert_not_delayed();
835 bp( ok_condition, true, Assembler::xcc, pt, ok);
836 // DELAY SLOT
837 }
838
839 void InterpreterMacroAssembler::throw_if_not_1_x( Condition ok_condition,
840 Label& ok ) {
841 assert_not_delayed();
842 brx(ok_condition, true, pt, ok);
843 // DELAY SLOT
844 }
845
846 void InterpreterMacroAssembler::throw_if_not_2( address throw_entry_point,
847 Register Rscratch,
848 Label& ok ) {
849 assert(throw_entry_point != NULL, "entry point must be generated by now");
850 AddressLiteral dest(throw_entry_point);
851 jump_to(dest, Rscratch);
852 delayed()->nop();
853 bind(ok);
854 }
855
856
857 // And if you cannot use the delay slot, here is a shorthand:
858
859 void InterpreterMacroAssembler::throw_if_not_icc( Condition ok_condition,
860 address throw_entry_point,
861 Register Rscratch ) {
862 Label ok;
863 if (ok_condition != never) {
864 throw_if_not_1_icc( ok_condition, ok);
865 delayed()->nop();
866 }
867 throw_if_not_2( throw_entry_point, Rscratch, ok);
868 }
869 void InterpreterMacroAssembler::throw_if_not_xcc( Condition ok_condition,
870 address throw_entry_point,
871 Register Rscratch ) {
872 Label ok;
873 if (ok_condition != never) {
874 throw_if_not_1_xcc( ok_condition, ok);
875 delayed()->nop();
876 }
877 throw_if_not_2( throw_entry_point, Rscratch, ok);
878 }
879 void InterpreterMacroAssembler::throw_if_not_x( Condition ok_condition,
880 address throw_entry_point,
881 Register Rscratch ) {
882 Label ok;
883 if (ok_condition != never) {
884 throw_if_not_1_x( ok_condition, ok);
885 delayed()->nop();
886 }
887 throw_if_not_2( throw_entry_point, Rscratch, ok);
888 }
889
890 // Check that index is in range for array, then shift index by index_shift, and put arrayOop + shifted_index into res
891 // Note: res is still shy of address by array offset into object.
892
893 void InterpreterMacroAssembler::index_check_without_pop(Register array, Register index, int index_shift, Register tmp, Register res) {
894 assert_not_delayed();
895
896 verify_oop(array);
897 #ifdef _LP64
898 // sign extend since tos (index) can be a 32bit value
899 sra(index, G0, index);
900 #endif // _LP64
901
902 // check array
903 Label ptr_ok;
904 tst(array);
905 throw_if_not_1_x( notZero, ptr_ok );
906 delayed()->ld( array, arrayOopDesc::length_offset_in_bytes(), tmp ); // check index
907 throw_if_not_2( Interpreter::_throw_NullPointerException_entry, G3_scratch, ptr_ok);
908
909 Label index_ok;
910 cmp(index, tmp);
911 throw_if_not_1_icc( lessUnsigned, index_ok );
912 if (index_shift > 0) delayed()->sll(index, index_shift, index);
913 else delayed()->add(array, index, res); // addr - const offset in index
914 // convention: move aberrant index into G3_scratch for exception message
915 mov(index, G3_scratch);
916 throw_if_not_2( Interpreter::_throw_ArrayIndexOutOfBoundsException_entry, G4_scratch, index_ok);
917
918 // add offset if didn't do it in delay slot
919 if (index_shift > 0) add(array, index, res); // addr - const offset in index
920 }
921
922
923 void InterpreterMacroAssembler::index_check(Register array, Register index, int index_shift, Register tmp, Register res) {
924 assert_not_delayed();
925
926 // pop array
927 pop_ptr(array);
928
929 // check array
930 index_check_without_pop(array, index, index_shift, tmp, res);
931 }
932
933
934 void InterpreterMacroAssembler::get_constant_pool(Register Rdst) {
935 ld_ptr(Lmethod, in_bytes(methodOopDesc::constants_offset()), Rdst);
936 }
937
938
939 void InterpreterMacroAssembler::get_constant_pool_cache(Register Rdst) {
940 get_constant_pool(Rdst);
941 ld_ptr(Rdst, constantPoolOopDesc::cache_offset_in_bytes(), Rdst);
942 }
943
944
945 void InterpreterMacroAssembler::get_cpool_and_tags(Register Rcpool, Register Rtags) {
946 get_constant_pool(Rcpool);
947 ld_ptr(Rcpool, constantPoolOopDesc::tags_offset_in_bytes(), Rtags);
948 }
949
950
951 // unlock if synchronized method
952 //
953 // Unlock the receiver if this is a synchronized method.
954 // Unlock any Java monitors from syncronized blocks.
955 //
956 // If there are locked Java monitors
957 // If throw_monitor_exception
958 // throws IllegalMonitorStateException
959 // Else if install_monitor_exception
960 // installs IllegalMonitorStateException
961 // Else
962 // no error processing
963 void InterpreterMacroAssembler::unlock_if_synchronized_method(TosState state,
964 bool throw_monitor_exception,
965 bool install_monitor_exception) {
966 Label unlocked, unlock, no_unlock;
967
968 // get the value of _do_not_unlock_if_synchronized into G1_scratch
969 const Address do_not_unlock_if_synchronized(G2_thread,
970 JavaThread::do_not_unlock_if_synchronized_offset());
971 ldbool(do_not_unlock_if_synchronized, G1_scratch);
972 stbool(G0, do_not_unlock_if_synchronized); // reset the flag
973
974 // check if synchronized method
975 const Address access_flags(Lmethod, methodOopDesc::access_flags_offset());
976 interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
977 push(state); // save tos
978 ld(access_flags, G3_scratch); // Load access flags.
979 btst(JVM_ACC_SYNCHRONIZED, G3_scratch);
980 br(zero, false, pt, unlocked);
981 delayed()->nop();
982
983 // Don't unlock anything if the _do_not_unlock_if_synchronized flag
984 // is set.
985 tstbool(G1_scratch);
986 br(Assembler::notZero, false, pn, no_unlock);
987 delayed()->nop();
988
989 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
990 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
991
992 //Intel: if (throw_monitor_exception) ... else ...
993 // Entry already unlocked, need to throw exception
994 //...
995
996 // pass top-most monitor elem
997 add( top_most_monitor(), O1 );
998
999 ld_ptr(O1, BasicObjectLock::obj_offset_in_bytes(), G3_scratch);
1000 br_notnull(G3_scratch, false, pt, unlock);
1001 delayed()->nop();
1002
1003 if (throw_monitor_exception) {
1004 // Entry already unlocked need to throw an exception
1005 MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
1006 should_not_reach_here();
1007 } else {
1008 // Monitor already unlocked during a stack unroll.
1009 // If requested, install an illegal_monitor_state_exception.
1010 // Continue with stack unrolling.
1011 if (install_monitor_exception) {
1012 MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
1013 }
1014 ba(false, unlocked);
1015 delayed()->nop();
1016 }
1017
1018 bind(unlock);
1019
1020 unlock_object(O1);
1021
1022 bind(unlocked);
1023
1024 // I0, I1: Might contain return value
1025
1026 // Check that all monitors are unlocked
1027 { Label loop, exception, entry, restart;
1028
1029 Register Rmptr = O0;
1030 Register Rtemp = O1;
1031 Register Rlimit = Lmonitors;
1032 const jint delta = frame::interpreter_frame_monitor_size() * wordSize;
1033 assert( (delta & LongAlignmentMask) == 0,
1034 "sizeof BasicObjectLock must be even number of doublewords");
1035
1036 #ifdef ASSERT
1037 add(top_most_monitor(), Rmptr, delta);
1038 { Label L;
1039 // ensure that Rmptr starts out above (or at) Rlimit
1040 cmp(Rmptr, Rlimit);
1041 brx(Assembler::greaterEqualUnsigned, false, pn, L);
1042 delayed()->nop();
1043 stop("monitor stack has negative size");
1044 bind(L);
1045 }
1046 #endif
1047 bind(restart);
1048 ba(false, entry);
1049 delayed()->
1050 add(top_most_monitor(), Rmptr, delta); // points to current entry, starting with bottom-most entry
1051
1052 // Entry is still locked, need to throw exception
1053 bind(exception);
1054 if (throw_monitor_exception) {
1055 MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
1056 should_not_reach_here();
1057 } else {
1058 // Stack unrolling. Unlock object and if requested, install illegal_monitor_exception.
1059 // Unlock does not block, so don't have to worry about the frame
1060 unlock_object(Rmptr);
1061 if (install_monitor_exception) {
1062 MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception));
1063 }
1064 ba(false, restart);
1065 delayed()->nop();
1066 }
1067
1068 bind(loop);
1069 cmp(Rtemp, G0); // check if current entry is used
1070 brx(Assembler::notEqual, false, pn, exception);
1071 delayed()->
1072 dec(Rmptr, delta); // otherwise advance to next entry
1073 #ifdef ASSERT
1074 { Label L;
1075 // ensure that Rmptr has not somehow stepped below Rlimit
1076 cmp(Rmptr, Rlimit);
1077 brx(Assembler::greaterEqualUnsigned, false, pn, L);
1078 delayed()->nop();
1079 stop("ran off the end of the monitor stack");
1080 bind(L);
1081 }
1082 #endif
1083 bind(entry);
1084 cmp(Rmptr, Rlimit); // check if bottom reached
1085 brx(Assembler::notEqual, true, pn, loop); // if not at bottom then check this entry
1086 delayed()->
1087 ld_ptr(Rmptr, BasicObjectLock::obj_offset_in_bytes() - delta, Rtemp);
1088 }
1089
1090 bind(no_unlock);
1091 pop(state);
1092 interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
1093 }
1094
1095
1096 // remove activation
1097 //
1098 // Unlock the receiver if this is a synchronized method.
1099 // Unlock any Java monitors from syncronized blocks.
1100 // Remove the activation from the stack.
1101 //
1102 // If there are locked Java monitors
1103 // If throw_monitor_exception
1104 // throws IllegalMonitorStateException
1105 // Else if install_monitor_exception
1106 // installs IllegalMonitorStateException
1107 // Else
1108 // no error processing
1109 void InterpreterMacroAssembler::remove_activation(TosState state,
1110 bool throw_monitor_exception,
1111 bool install_monitor_exception) {
1112
1113 unlock_if_synchronized_method(state, throw_monitor_exception, install_monitor_exception);
1114
1115 // save result (push state before jvmti call and pop it afterwards) and notify jvmti
1116 notify_method_exit(false, state, NotifyJVMTI);
1117
1118 interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
1119 verify_oop(Lmethod);
1120 verify_thread();
1121
1122 // return tos
1123 assert(Otos_l1 == Otos_i, "adjust code below");
1124 switch (state) {
1125 #ifdef _LP64
1126 case ltos: mov(Otos_l, Otos_l->after_save()); break; // O0 -> I0
1127 #else
1128 case ltos: mov(Otos_l2, Otos_l2->after_save()); // fall through // O1 -> I1
1129 #endif
1130 case btos: // fall through
1131 case ctos:
1132 case stos: // fall through
1133 case atos: // fall through
1134 case itos: mov(Otos_l1, Otos_l1->after_save()); break; // O0 -> I0
1135 case ftos: // fall through
1136 case dtos: // fall through
1137 case vtos: /* nothing to do */ break;
1138 default : ShouldNotReachHere();
1139 }
1140
1141 #if defined(COMPILER2) && !defined(_LP64)
1142 if (state == ltos) {
1143 // C2 expects long results in G1 we can't tell if we're returning to interpreted
1144 // or compiled so just be safe use G1 and O0/O1
1145
1146 // Shift bits into high (msb) of G1
1147 sllx(Otos_l1->after_save(), 32, G1);
1148 // Zero extend low bits
1149 srl (Otos_l2->after_save(), 0, Otos_l2->after_save());
1150 or3 (Otos_l2->after_save(), G1, G1);
1151 }
1152 #endif /* COMPILER2 */
1153
1154 }
1155 #endif /* CC_INTERP */
1156
1157
1158 // Lock object
1159 //
1160 // Argument - lock_reg points to the BasicObjectLock to be used for locking,
1161 // it must be initialized with the object to lock
1162 void InterpreterMacroAssembler::lock_object(Register lock_reg, Register Object) {
1163 if (UseHeavyMonitors) {
1164 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
1165 }
1166 else {
1167 Register obj_reg = Object;
1168 Register mark_reg = G4_scratch;
1169 Register temp_reg = G1_scratch;
1170 Address lock_addr(lock_reg, BasicObjectLock::lock_offset_in_bytes());
1171 Address mark_addr(obj_reg, oopDesc::mark_offset_in_bytes());
1172 Label done;
1173
1174 Label slow_case;
1175
1176 assert_different_registers(lock_reg, obj_reg, mark_reg, temp_reg);
1177
1178 // load markOop from object into mark_reg
1179 ld_ptr(mark_addr, mark_reg);
1180
1181 if (UseBiasedLocking) {
1182 biased_locking_enter(obj_reg, mark_reg, temp_reg, done, &slow_case);
1183 }
1184
1185 // get the address of basicLock on stack that will be stored in the object
1186 // we need a temporary register here as we do not want to clobber lock_reg
1187 // (cas clobbers the destination register)
1188 mov(lock_reg, temp_reg);
1189 // set mark reg to be (markOop of object | UNLOCK_VALUE)
1190 or3(mark_reg, markOopDesc::unlocked_value, mark_reg);
1191 // initialize the box (Must happen before we update the object mark!)
1192 st_ptr(mark_reg, lock_addr, BasicLock::displaced_header_offset_in_bytes());
1193 // compare and exchange object_addr, markOop | 1, stack address of basicLock
1194 assert(mark_addr.disp() == 0, "cas must take a zero displacement");
1195 casx_under_lock(mark_addr.base(), mark_reg, temp_reg,
1196 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
1197
1198 // if the compare and exchange succeeded we are done (we saw an unlocked object)
1199 cmp(mark_reg, temp_reg);
1200 brx(Assembler::equal, true, Assembler::pt, done);
1201 delayed()->nop();
1202
1203 // We did not see an unlocked object so try the fast recursive case
1204
1205 // Check if owner is self by comparing the value in the markOop of object
1206 // with the stack pointer
1207 sub(temp_reg, SP, temp_reg);
1208 #ifdef _LP64
1209 sub(temp_reg, STACK_BIAS, temp_reg);
1210 #endif
1211 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant");
1212
1213 // Composite "andcc" test:
1214 // (a) %sp -vs- markword proximity check, and,
1215 // (b) verify mark word LSBs == 0 (Stack-locked).
1216 //
1217 // FFFFF003/FFFFFFFFFFFF003 is (markOopDesc::lock_mask_in_place | -os::vm_page_size())
1218 // Note that the page size used for %sp proximity testing is arbitrary and is
1219 // unrelated to the actual MMU page size. We use a 'logical' page size of
1220 // 4096 bytes. F..FFF003 is designed to fit conveniently in the SIMM13 immediate
1221 // field of the andcc instruction.
1222 andcc (temp_reg, 0xFFFFF003, G0) ;
1223
1224 // if condition is true we are done and hence we can store 0 in the displaced
1225 // header indicating it is a recursive lock and be done
1226 brx(Assembler::zero, true, Assembler::pt, done);
1227 delayed()->st_ptr(G0, lock_addr, BasicLock::displaced_header_offset_in_bytes());
1228
1229 // none of the above fast optimizations worked so we have to get into the
1230 // slow case of monitor enter
1231 bind(slow_case);
1232 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
1233
1234 bind(done);
1235 }
1236 }
1237
1238 // Unlocks an object. Used in monitorexit bytecode and remove_activation.
1239 //
1240 // Argument - lock_reg points to the BasicObjectLock for lock
1241 // Throw IllegalMonitorException if object is not locked by current thread
1242 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
1243 if (UseHeavyMonitors) {
1244 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1245 } else {
1246 Register obj_reg = G3_scratch;
1247 Register mark_reg = G4_scratch;
1248 Register displaced_header_reg = G1_scratch;
1249 Address lockobj_addr(lock_reg, BasicObjectLock::obj_offset_in_bytes());
1250 Address mark_addr(obj_reg, oopDesc::mark_offset_in_bytes());
1251 Label done;
1252
1253 if (UseBiasedLocking) {
1254 // load the object out of the BasicObjectLock
1255 ld_ptr(lockobj_addr, obj_reg);
1256 biased_locking_exit(mark_addr, mark_reg, done, true);
1257 st_ptr(G0, lockobj_addr); // free entry
1258 }
1259
1260 // Test first if we are in the fast recursive case
1261 Address lock_addr(lock_reg, BasicObjectLock::lock_offset_in_bytes() + BasicLock::displaced_header_offset_in_bytes());
1262 ld_ptr(lock_addr, displaced_header_reg);
1263 br_null(displaced_header_reg, true, Assembler::pn, done);
1264 delayed()->st_ptr(G0, lockobj_addr); // free entry
1265
1266 // See if it is still a light weight lock, if so we just unlock
1267 // the object and we are done
1268
1269 if (!UseBiasedLocking) {
1270 // load the object out of the BasicObjectLock
1271 ld_ptr(lockobj_addr, obj_reg);
1272 }
1273
1274 // we have the displaced header in displaced_header_reg
1275 // we expect to see the stack address of the basicLock in case the
1276 // lock is still a light weight lock (lock_reg)
1277 assert(mark_addr.disp() == 0, "cas must take a zero displacement");
1278 casx_under_lock(mark_addr.base(), lock_reg, displaced_header_reg,
1279 (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
1280 cmp(lock_reg, displaced_header_reg);
1281 brx(Assembler::equal, true, Assembler::pn, done);
1282 delayed()->st_ptr(G0, lockobj_addr); // free entry
1283
1284 // The lock has been converted into a heavy lock and hence
1285 // we need to get into the slow case
1286
1287 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
1288
1289 bind(done);
1290 }
1291 }
1292
1293 #ifndef CC_INTERP
1294
1295 // Get the method data pointer from the methodOop and set the
1296 // specified register to its value.
1297
1298 void InterpreterMacroAssembler::set_method_data_pointer_offset(Register Roff) {
1299 assert(ProfileInterpreter, "must be profiling interpreter");
1300 Label get_continue;
1301
1302 ld_ptr(Lmethod, in_bytes(methodOopDesc::method_data_offset()), ImethodDataPtr);
1303 test_method_data_pointer(get_continue);
1304 add(ImethodDataPtr, in_bytes(methodDataOopDesc::data_offset()), ImethodDataPtr);
1305 if (Roff != noreg)
1306 // Roff contains a method data index ("mdi"). It defaults to zero.
1307 add(ImethodDataPtr, Roff, ImethodDataPtr);
1308 bind(get_continue);
1309 }
1310
1311 // Set the method data pointer for the current bcp.
1312
1313 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
1314 assert(ProfileInterpreter, "must be profiling interpreter");
1315 Label zero_continue;
1316
1317 // Test MDO to avoid the call if it is NULL.
1318 ld_ptr(Lmethod, methodOopDesc::method_data_offset(), ImethodDataPtr);
1319 test_method_data_pointer(zero_continue);
1320 call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), Lmethod, Lbcp);
1321 set_method_data_pointer_offset(O0);
1322 bind(zero_continue);
1323 }
1324
1325 // Test ImethodDataPtr. If it is null, continue at the specified label
1326
1327 void InterpreterMacroAssembler::test_method_data_pointer(Label& zero_continue) {
1328 assert(ProfileInterpreter, "must be profiling interpreter");
1329 #ifdef _LP64
1330 bpr(Assembler::rc_z, false, Assembler::pn, ImethodDataPtr, zero_continue);
1331 #else
1332 tst(ImethodDataPtr);
1333 br(Assembler::zero, false, Assembler::pn, zero_continue);
1334 #endif
1335 delayed()->nop();
1336 }
1337
1338 void InterpreterMacroAssembler::verify_method_data_pointer() {
1339 assert(ProfileInterpreter, "must be profiling interpreter");
1340 #ifdef ASSERT
1341 Label verify_continue;
1342 test_method_data_pointer(verify_continue);
1343
1344 // If the mdp is valid, it will point to a DataLayout header which is
1345 // consistent with the bcp. The converse is highly probable also.
1346 lduh(ImethodDataPtr, in_bytes(DataLayout::bci_offset()), G3_scratch);
1347 ld_ptr(Lmethod, methodOopDesc::const_offset(), O5);
1348 add(G3_scratch, in_bytes(constMethodOopDesc::codes_offset()), G3_scratch);
1349 add(G3_scratch, O5, G3_scratch);
1350 cmp(Lbcp, G3_scratch);
1351 brx(Assembler::equal, false, Assembler::pt, verify_continue);
1352
1353 Register temp_reg = O5;
1354 delayed()->mov(ImethodDataPtr, temp_reg);
1355 // %%% should use call_VM_leaf here?
1356 //call_VM_leaf(noreg, ..., Lmethod, Lbcp, ImethodDataPtr);
1357 save_frame_and_mov(sizeof(jdouble) / wordSize, Lmethod, O0, Lbcp, O1);
1358 Address d_save(FP, -sizeof(jdouble) + STACK_BIAS);
1359 stf(FloatRegisterImpl::D, Ftos_d, d_save);
1360 mov(temp_reg->after_save(), O2);
1361 save_thread(L7_thread_cache);
1362 call(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), relocInfo::none);
1363 delayed()->nop();
1364 restore_thread(L7_thread_cache);
1365 ldf(FloatRegisterImpl::D, d_save, Ftos_d);
1366 restore();
1367 bind(verify_continue);
1368 #endif // ASSERT
1369 }
1370
1371 void InterpreterMacroAssembler::test_invocation_counter_for_mdp(Register invocation_count,
1372 Register cur_bcp,
1373 Register Rtmp,
1374 Label &profile_continue) {
1375 assert(ProfileInterpreter, "must be profiling interpreter");
1376 // Control will flow to "profile_continue" if the counter is less than the
1377 // limit or if we call profile_method()
1378
1379 Label done;
1380
1381 // if no method data exists, and the counter is high enough, make one
1382 #ifdef _LP64
1383 bpr(Assembler::rc_nz, false, Assembler::pn, ImethodDataPtr, done);
1384 #else
1385 tst(ImethodDataPtr);
1386 br(Assembler::notZero, false, Assembler::pn, done);
1387 #endif
1388
1389 // Test to see if we should create a method data oop
1390 AddressLiteral profile_limit((address) &InvocationCounter::InterpreterProfileLimit);
1391 #ifdef _LP64
1392 delayed()->nop();
1393 sethi(profile_limit, Rtmp);
1394 #else
1395 delayed()->sethi(profile_limit, Rtmp);
1396 #endif
1397 ld(Rtmp, profile_limit.low10(), Rtmp);
1398 cmp(invocation_count, Rtmp);
1399 br(Assembler::lessUnsigned, false, Assembler::pn, profile_continue);
1400 delayed()->nop();
1401
1402 // Build it now.
1403 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), cur_bcp);
1404 set_method_data_pointer_offset(O0);
1405 ba(false, profile_continue);
1406 delayed()->nop();
1407 bind(done);
1408 }
1409
1410 // Store a value at some constant offset from the method data pointer.
1411
1412 void InterpreterMacroAssembler::set_mdp_data_at(int constant, Register value) {
1413 assert(ProfileInterpreter, "must be profiling interpreter");
1414 st_ptr(value, ImethodDataPtr, constant);
1415 }
1416
1417 void InterpreterMacroAssembler::increment_mdp_data_at(Address counter,
1418 Register bumped_count,
1419 bool decrement) {
1420 assert(ProfileInterpreter, "must be profiling interpreter");
1421
1422 // Load the counter.
1423 ld_ptr(counter, bumped_count);
1424
1425 if (decrement) {
1426 // Decrement the register. Set condition codes.
1427 subcc(bumped_count, DataLayout::counter_increment, bumped_count);
1428
1429 // If the decrement causes the counter to overflow, stay negative
1430 Label L;
1431 brx(Assembler::negative, true, Assembler::pn, L);
1432
1433 // Store the decremented counter, if it is still negative.
1434 delayed()->st_ptr(bumped_count, counter);
1435 bind(L);
1436 } else {
1437 // Increment the register. Set carry flag.
1438 addcc(bumped_count, DataLayout::counter_increment, bumped_count);
1439
1440 // If the increment causes the counter to overflow, pull back by 1.
1441 assert(DataLayout::counter_increment == 1, "subc works");
1442 subc(bumped_count, G0, bumped_count);
1443
1444 // Store the incremented counter.
1445 st_ptr(bumped_count, counter);
1446 }
1447 }
1448
1449 // Increment the value at some constant offset from the method data pointer.
1450
1451 void InterpreterMacroAssembler::increment_mdp_data_at(int constant,
1452 Register bumped_count,
1453 bool decrement) {
1454 // Locate the counter at a fixed offset from the mdp:
1455 Address counter(ImethodDataPtr, constant);
1456 increment_mdp_data_at(counter, bumped_count, decrement);
1457 }
1458
1459 // Increment the value at some non-fixed (reg + constant) offset from
1460 // the method data pointer.
1461
1462 void InterpreterMacroAssembler::increment_mdp_data_at(Register reg,
1463 int constant,
1464 Register bumped_count,
1465 Register scratch2,
1466 bool decrement) {
1467 // Add the constant to reg to get the offset.
1468 add(ImethodDataPtr, reg, scratch2);
1469 Address counter(scratch2, constant);
1470 increment_mdp_data_at(counter, bumped_count, decrement);
1471 }
1472
1473 // Set a flag value at the current method data pointer position.
1474 // Updates a single byte of the header, to avoid races with other header bits.
1475
1476 void InterpreterMacroAssembler::set_mdp_flag_at(int flag_constant,
1477 Register scratch) {
1478 assert(ProfileInterpreter, "must be profiling interpreter");
1479 // Load the data header
1480 ldub(ImethodDataPtr, in_bytes(DataLayout::flags_offset()), scratch);
1481
1482 // Set the flag
1483 or3(scratch, flag_constant, scratch);
1484
1485 // Store the modified header.
1486 stb(scratch, ImethodDataPtr, in_bytes(DataLayout::flags_offset()));
1487 }
1488
1489 // Test the location at some offset from the method data pointer.
1490 // If it is not equal to value, branch to the not_equal_continue Label.
1491 // Set condition codes to match the nullness of the loaded value.
1492
1493 void InterpreterMacroAssembler::test_mdp_data_at(int offset,
1494 Register value,
1495 Label& not_equal_continue,
1496 Register scratch) {
1497 assert(ProfileInterpreter, "must be profiling interpreter");
1498 ld_ptr(ImethodDataPtr, offset, scratch);
1499 cmp(value, scratch);
1500 brx(Assembler::notEqual, false, Assembler::pn, not_equal_continue);
1501 delayed()->tst(scratch);
1502 }
1503
1504 // Update the method data pointer by the displacement located at some fixed
1505 // offset from the method data pointer.
1506
1507 void InterpreterMacroAssembler::update_mdp_by_offset(int offset_of_disp,
1508 Register scratch) {
1509 assert(ProfileInterpreter, "must be profiling interpreter");
1510 ld_ptr(ImethodDataPtr, offset_of_disp, scratch);
1511 add(ImethodDataPtr, scratch, ImethodDataPtr);
1512 }
1513
1514 // Update the method data pointer by the displacement located at the
1515 // offset (reg + offset_of_disp).
1516
1517 void InterpreterMacroAssembler::update_mdp_by_offset(Register reg,
1518 int offset_of_disp,
1519 Register scratch) {
1520 assert(ProfileInterpreter, "must be profiling interpreter");
1521 add(reg, offset_of_disp, scratch);
1522 ld_ptr(ImethodDataPtr, scratch, scratch);
1523 add(ImethodDataPtr, scratch, ImethodDataPtr);
1524 }
1525
1526 // Update the method data pointer by a simple constant displacement.
1527
1528 void InterpreterMacroAssembler::update_mdp_by_constant(int constant) {
1529 assert(ProfileInterpreter, "must be profiling interpreter");
1530 add(ImethodDataPtr, constant, ImethodDataPtr);
1531 }
1532
1533 // Update the method data pointer for a _ret bytecode whose target
1534 // was not among our cached targets.
1535
1536 void InterpreterMacroAssembler::update_mdp_for_ret(TosState state,
1537 Register return_bci) {
1538 assert(ProfileInterpreter, "must be profiling interpreter");
1539 push(state);
1540 st_ptr(return_bci, l_tmp); // protect return_bci, in case it is volatile
1541 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci);
1542 ld_ptr(l_tmp, return_bci);
1543 pop(state);
1544 }
1545
1546 // Count a taken branch in the bytecodes.
1547
1548 void InterpreterMacroAssembler::profile_taken_branch(Register scratch, Register bumped_count) {
1549 if (ProfileInterpreter) {
1550 Label profile_continue;
1551
1552 // If no method data exists, go to profile_continue.
1553 test_method_data_pointer(profile_continue);
1554
1555 // We are taking a branch. Increment the taken count.
1556 increment_mdp_data_at(in_bytes(JumpData::taken_offset()), bumped_count);
1557
1558 // The method data pointer needs to be updated to reflect the new target.
1559 update_mdp_by_offset(in_bytes(JumpData::displacement_offset()), scratch);
1560 bind (profile_continue);
1561 }
1562 }
1563
1564
1565 // Count a not-taken branch in the bytecodes.
1566
1567 void InterpreterMacroAssembler::profile_not_taken_branch(Register scratch) {
1568 if (ProfileInterpreter) {
1569 Label profile_continue;
1570
1571 // If no method data exists, go to profile_continue.
1572 test_method_data_pointer(profile_continue);
1573
1574 // We are taking a branch. Increment the not taken count.
1575 increment_mdp_data_at(in_bytes(BranchData::not_taken_offset()), scratch);
1576
1577 // The method data pointer needs to be updated to correspond to the
1578 // next bytecode.
1579 update_mdp_by_constant(in_bytes(BranchData::branch_data_size()));
1580 bind (profile_continue);
1581 }
1582 }
1583
1584
1585 // Count a non-virtual call in the bytecodes.
1586
1587 void InterpreterMacroAssembler::profile_call(Register scratch) {
1588 if (ProfileInterpreter) {
1589 Label profile_continue;
1590
1591 // If no method data exists, go to profile_continue.
1592 test_method_data_pointer(profile_continue);
1593
1594 // We are making a call. Increment the count.
1595 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
1596
1597 // The method data pointer needs to be updated to reflect the new target.
1598 update_mdp_by_constant(in_bytes(CounterData::counter_data_size()));
1599 bind (profile_continue);
1600 }
1601 }
1602
1603
1604 // Count a final call in the bytecodes.
1605
1606 void InterpreterMacroAssembler::profile_final_call(Register scratch) {
1607 if (ProfileInterpreter) {
1608 Label profile_continue;
1609
1610 // If no method data exists, go to profile_continue.
1611 test_method_data_pointer(profile_continue);
1612
1613 // We are making a call. Increment the count.
1614 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
1615
1616 // The method data pointer needs to be updated to reflect the new target.
1617 update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
1618 bind (profile_continue);
1619 }
1620 }
1621
1622
1623 // Count a virtual call in the bytecodes.
1624
1625 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
1626 Register scratch,
1627 bool receiver_can_be_null) {
1628 if (ProfileInterpreter) {
1629 Label profile_continue;
1630
1631 // If no method data exists, go to profile_continue.
1632 test_method_data_pointer(profile_continue);
1633
1634
1635 Label skip_receiver_profile;
1636 if (receiver_can_be_null) {
1637 Label not_null;
1638 tst(receiver);
1639 brx(Assembler::notZero, false, Assembler::pt, not_null);
1640 delayed()->nop();
1641 // We are making a call. Increment the count for null receiver.
1642 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
1643 ba(false, skip_receiver_profile);
1644 delayed()->nop();
1645 bind(not_null);
1646 }
1647
1648 // Record the receiver type.
1649 record_klass_in_profile(receiver, scratch, true);
1650 bind(skip_receiver_profile);
1651
1652 // The method data pointer needs to be updated to reflect the new target.
1653 update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size()));
1654 bind (profile_continue);
1655 }
1656 }
1657
1658 void InterpreterMacroAssembler::record_klass_in_profile_helper(
1659 Register receiver, Register scratch,
1660 int start_row, Label& done, bool is_virtual_call) {
1661 if (TypeProfileWidth == 0) {
1662 if (is_virtual_call) {
1663 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
1664 }
1665 return;
1666 }
1667
1668 int last_row = VirtualCallData::row_limit() - 1;
1669 assert(start_row <= last_row, "must be work left to do");
1670 // Test this row for both the receiver and for null.
1671 // Take any of three different outcomes:
1672 // 1. found receiver => increment count and goto done
1673 // 2. found null => keep looking for case 1, maybe allocate this cell
1674 // 3. found something else => keep looking for cases 1 and 2
1675 // Case 3 is handled by a recursive call.
1676 for (int row = start_row; row <= last_row; row++) {
1677 Label next_test;
1678 bool test_for_null_also = (row == start_row);
1679
1680 // See if the receiver is receiver[n].
1681 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
1682 test_mdp_data_at(recvr_offset, receiver, next_test, scratch);
1683 // delayed()->tst(scratch);
1684
1685 // The receiver is receiver[n]. Increment count[n].
1686 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
1687 increment_mdp_data_at(count_offset, scratch);
1688 ba(false, done);
1689 delayed()->nop();
1690 bind(next_test);
1691
1692 if (test_for_null_also) {
1693 Label found_null;
1694 // Failed the equality check on receiver[n]... Test for null.
1695 if (start_row == last_row) {
1696 // The only thing left to do is handle the null case.
1697 if (is_virtual_call) {
1698 brx(Assembler::zero, false, Assembler::pn, found_null);
1699 delayed()->nop();
1700 // Receiver did not match any saved receiver and there is no empty row for it.
1701 // Increment total counter to indicate polymorphic case.
1702 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
1703 ba(false, done);
1704 delayed()->nop();
1705 bind(found_null);
1706 } else {
1707 brx(Assembler::notZero, false, Assembler::pt, done);
1708 delayed()->nop();
1709 }
1710 break;
1711 }
1712 // Since null is rare, make it be the branch-taken case.
1713 brx(Assembler::zero, false, Assembler::pn, found_null);
1714 delayed()->nop();
1715
1716 // Put all the "Case 3" tests here.
1717 record_klass_in_profile_helper(receiver, scratch, start_row + 1, done, is_virtual_call);
1718
1719 // Found a null. Keep searching for a matching receiver,
1720 // but remember that this is an empty (unused) slot.
1721 bind(found_null);
1722 }
1723 }
1724
1725 // In the fall-through case, we found no matching receiver, but we
1726 // observed the receiver[start_row] is NULL.
1727
1728 // Fill in the receiver field and increment the count.
1729 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
1730 set_mdp_data_at(recvr_offset, receiver);
1731 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
1732 mov(DataLayout::counter_increment, scratch);
1733 set_mdp_data_at(count_offset, scratch);
1734 if (start_row > 0) {
1735 ba(false, done);
1736 delayed()->nop();
1737 }
1738 }
1739
1740 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
1741 Register scratch, bool is_virtual_call) {
1742 assert(ProfileInterpreter, "must be profiling");
1743 Label done;
1744
1745 record_klass_in_profile_helper(receiver, scratch, 0, done, is_virtual_call);
1746
1747 bind (done);
1748 }
1749
1750
1751 // Count a ret in the bytecodes.
1752
1753 void InterpreterMacroAssembler::profile_ret(TosState state,
1754 Register return_bci,
1755 Register scratch) {
1756 if (ProfileInterpreter) {
1757 Label profile_continue;
1758 uint row;
1759
1760 // If no method data exists, go to profile_continue.
1761 test_method_data_pointer(profile_continue);
1762
1763 // Update the total ret count.
1764 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch);
1765
1766 for (row = 0; row < RetData::row_limit(); row++) {
1767 Label next_test;
1768
1769 // See if return_bci is equal to bci[n]:
1770 test_mdp_data_at(in_bytes(RetData::bci_offset(row)),
1771 return_bci, next_test, scratch);
1772
1773 // return_bci is equal to bci[n]. Increment the count.
1774 increment_mdp_data_at(in_bytes(RetData::bci_count_offset(row)), scratch);
1775
1776 // The method data pointer needs to be updated to reflect the new target.
1777 update_mdp_by_offset(in_bytes(RetData::bci_displacement_offset(row)), scratch);
1778 ba(false, profile_continue);
1779 delayed()->nop();
1780 bind(next_test);
1781 }
1782
1783 update_mdp_for_ret(state, return_bci);
1784
1785 bind (profile_continue);
1786 }
1787 }
1788
1789 // Profile an unexpected null in the bytecodes.
1790 void InterpreterMacroAssembler::profile_null_seen(Register scratch) {
1791 if (ProfileInterpreter) {
1792 Label profile_continue;
1793
1794 // If no method data exists, go to profile_continue.
1795 test_method_data_pointer(profile_continue);
1796
1797 set_mdp_flag_at(BitData::null_seen_byte_constant(), scratch);
1798
1799 // The method data pointer needs to be updated.
1800 int mdp_delta = in_bytes(BitData::bit_data_size());
1801 if (TypeProfileCasts) {
1802 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1803 }
1804 update_mdp_by_constant(mdp_delta);
1805
1806 bind (profile_continue);
1807 }
1808 }
1809
1810 void InterpreterMacroAssembler::profile_typecheck(Register klass,
1811 Register scratch) {
1812 if (ProfileInterpreter) {
1813 Label profile_continue;
1814
1815 // If no method data exists, go to profile_continue.
1816 test_method_data_pointer(profile_continue);
1817
1818 int mdp_delta = in_bytes(BitData::bit_data_size());
1819 if (TypeProfileCasts) {
1820 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
1821
1822 // Record the object type.
1823 record_klass_in_profile(klass, scratch, false);
1824 }
1825
1826 // The method data pointer needs to be updated.
1827 update_mdp_by_constant(mdp_delta);
1828
1829 bind (profile_continue);
1830 }
1831 }
1832
1833 void InterpreterMacroAssembler::profile_typecheck_failed(Register scratch) {
1834 if (ProfileInterpreter && TypeProfileCasts) {
1835 Label profile_continue;
1836
1837 // If no method data exists, go to profile_continue.
1838 test_method_data_pointer(profile_continue);
1839
1840 int count_offset = in_bytes(CounterData::count_offset());
1841 // Back up the address, since we have already bumped the mdp.
1842 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
1843
1844 // *Decrement* the counter. We expect to see zero or small negatives.
1845 increment_mdp_data_at(count_offset, scratch, true);
1846
1847 bind (profile_continue);
1848 }
1849 }
1850
1851 // Count the default case of a switch construct.
1852
1853 void InterpreterMacroAssembler::profile_switch_default(Register scratch) {
1854 if (ProfileInterpreter) {
1855 Label profile_continue;
1856
1857 // If no method data exists, go to profile_continue.
1858 test_method_data_pointer(profile_continue);
1859
1860 // Update the default case count
1861 increment_mdp_data_at(in_bytes(MultiBranchData::default_count_offset()),
1862 scratch);
1863
1864 // The method data pointer needs to be updated.
1865 update_mdp_by_offset(
1866 in_bytes(MultiBranchData::default_displacement_offset()),
1867 scratch);
1868
1869 bind (profile_continue);
1870 }
1871 }
1872
1873 // Count the index'th case of a switch construct.
1874
1875 void InterpreterMacroAssembler::profile_switch_case(Register index,
1876 Register scratch,
1877 Register scratch2,
1878 Register scratch3) {
1879 if (ProfileInterpreter) {
1880 Label profile_continue;
1881
1882 // If no method data exists, go to profile_continue.
1883 test_method_data_pointer(profile_continue);
1884
1885 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
1886 set(in_bytes(MultiBranchData::per_case_size()), scratch);
1887 smul(index, scratch, scratch);
1888 add(scratch, in_bytes(MultiBranchData::case_array_offset()), scratch);
1889
1890 // Update the case count
1891 increment_mdp_data_at(scratch,
1892 in_bytes(MultiBranchData::relative_count_offset()),
1893 scratch2,
1894 scratch3);
1895
1896 // The method data pointer needs to be updated.
1897 update_mdp_by_offset(scratch,
1898 in_bytes(MultiBranchData::relative_displacement_offset()),
1899 scratch2);
1900
1901 bind (profile_continue);
1902 }
1903 }
1904
1905 // add a InterpMonitorElem to stack (see frame_sparc.hpp)
1906
1907 void InterpreterMacroAssembler::add_monitor_to_stack( bool stack_is_empty,
1908 Register Rtemp,
1909 Register Rtemp2 ) {
1910
1911 Register Rlimit = Lmonitors;
1912 const jint delta = frame::interpreter_frame_monitor_size() * wordSize;
1913 assert( (delta & LongAlignmentMask) == 0,
1914 "sizeof BasicObjectLock must be even number of doublewords");
1915
1916 sub( SP, delta, SP);
1917 sub( Lesp, delta, Lesp);
1918 sub( Lmonitors, delta, Lmonitors);
1919
1920 if (!stack_is_empty) {
1921
1922 // must copy stack contents down
1923
1924 Label start_copying, next;
1925
1926 // untested("monitor stack expansion");
1927 compute_stack_base(Rtemp);
1928 ba( false, start_copying );
1929 delayed()->cmp( Rtemp, Rlimit); // done? duplicated below
1930
1931 // note: must copy from low memory upwards
1932 // On entry to loop,
1933 // Rtemp points to new base of stack, Lesp points to new end of stack (1 past TOS)
1934 // Loop mutates Rtemp
1935
1936 bind( next);
1937
1938 st_ptr(Rtemp2, Rtemp, 0);
1939 inc(Rtemp, wordSize);
1940 cmp(Rtemp, Rlimit); // are we done? (duplicated above)
1941
1942 bind( start_copying );
1943
1944 brx( notEqual, true, pn, next );
1945 delayed()->ld_ptr( Rtemp, delta, Rtemp2 );
1946
1947 // done copying stack
1948 }
1949 }
1950
1951 // Locals
1952 void InterpreterMacroAssembler::access_local_ptr( Register index, Register dst ) {
1953 assert_not_delayed();
1954 sll(index, Interpreter::logStackElementSize, index);
1955 sub(Llocals, index, index);
1956 ld_ptr(index, 0, dst);
1957 // Note: index must hold the effective address--the iinc template uses it
1958 }
1959
1960 // Just like access_local_ptr but the tag is a returnAddress
1961 void InterpreterMacroAssembler::access_local_returnAddress(Register index,
1962 Register dst ) {
1963 assert_not_delayed();
1964 sll(index, Interpreter::logStackElementSize, index);
1965 sub(Llocals, index, index);
1966 ld_ptr(index, 0, dst);
1967 }
1968
1969 void InterpreterMacroAssembler::access_local_int( Register index, Register dst ) {
1970 assert_not_delayed();
1971 sll(index, Interpreter::logStackElementSize, index);
1972 sub(Llocals, index, index);
1973 ld(index, 0, dst);
1974 // Note: index must hold the effective address--the iinc template uses it
1975 }
1976
1977
1978 void InterpreterMacroAssembler::access_local_long( Register index, Register dst ) {
1979 assert_not_delayed();
1980 sll(index, Interpreter::logStackElementSize, index);
1981 sub(Llocals, index, index);
1982 // First half stored at index n+1 (which grows down from Llocals[n])
1983 load_unaligned_long(index, Interpreter::local_offset_in_bytes(1), dst);
1984 }
1985
1986
1987 void InterpreterMacroAssembler::access_local_float( Register index, FloatRegister dst ) {
1988 assert_not_delayed();
1989 sll(index, Interpreter::logStackElementSize, index);
1990 sub(Llocals, index, index);
1991 ldf(FloatRegisterImpl::S, index, 0, dst);
1992 }
1993
1994
1995 void InterpreterMacroAssembler::access_local_double( Register index, FloatRegister dst ) {
1996 assert_not_delayed();
1997 sll(index, Interpreter::logStackElementSize, index);
1998 sub(Llocals, index, index);
1999 load_unaligned_double(index, Interpreter::local_offset_in_bytes(1), dst);
2000 }
2001
2002
2003 #ifdef ASSERT
2004 void InterpreterMacroAssembler::check_for_regarea_stomp(Register Rindex, int offset, Register Rlimit, Register Rscratch, Register Rscratch1) {
2005 Label L;
2006
2007 assert(Rindex != Rscratch, "Registers cannot be same");
2008 assert(Rindex != Rscratch1, "Registers cannot be same");
2009 assert(Rlimit != Rscratch, "Registers cannot be same");
2010 assert(Rlimit != Rscratch1, "Registers cannot be same");
2011 assert(Rscratch1 != Rscratch, "Registers cannot be same");
2012
2013 // untested("reg area corruption");
2014 add(Rindex, offset, Rscratch);
2015 add(Rlimit, 64 + STACK_BIAS, Rscratch1);
2016 cmp(Rscratch, Rscratch1);
2017 brx(Assembler::greaterEqualUnsigned, false, pn, L);
2018 delayed()->nop();
2019 stop("regsave area is being clobbered");
2020 bind(L);
2021 }
2022 #endif // ASSERT
2023
2024
2025 void InterpreterMacroAssembler::store_local_int( Register index, Register src ) {
2026 assert_not_delayed();
2027 sll(index, Interpreter::logStackElementSize, index);
2028 sub(Llocals, index, index);
2029 debug_only(check_for_regarea_stomp(index, 0, FP, G1_scratch, G4_scratch);)
2030 st(src, index, 0);
2031 }
2032
2033 void InterpreterMacroAssembler::store_local_ptr( Register index, Register src ) {
2034 assert_not_delayed();
2035 sll(index, Interpreter::logStackElementSize, index);
2036 sub(Llocals, index, index);
2037 #ifdef ASSERT
2038 check_for_regarea_stomp(index, 0, FP, G1_scratch, G4_scratch);
2039 #endif
2040 st_ptr(src, index, 0);
2041 }
2042
2043
2044
2045 void InterpreterMacroAssembler::store_local_ptr( int n, Register src ) {
2046 st_ptr(src, Llocals, Interpreter::local_offset_in_bytes(n));
2047 }
2048
2049 void InterpreterMacroAssembler::store_local_long( Register index, Register src ) {
2050 assert_not_delayed();
2051 sll(index, Interpreter::logStackElementSize, index);
2052 sub(Llocals, index, index);
2053 #ifdef ASSERT
2054 check_for_regarea_stomp(index, Interpreter::local_offset_in_bytes(1), FP, G1_scratch, G4_scratch);
2055 #endif
2056 store_unaligned_long(src, index, Interpreter::local_offset_in_bytes(1)); // which is n+1
2057 }
2058
2059
2060 void InterpreterMacroAssembler::store_local_float( Register index, FloatRegister src ) {
2061 assert_not_delayed();
2062 sll(index, Interpreter::logStackElementSize, index);
2063 sub(Llocals, index, index);
2064 #ifdef ASSERT
2065 check_for_regarea_stomp(index, 0, FP, G1_scratch, G4_scratch);
2066 #endif
2067 stf(FloatRegisterImpl::S, src, index, 0);
2068 }
2069
2070
2071 void InterpreterMacroAssembler::store_local_double( Register index, FloatRegister src ) {
2072 assert_not_delayed();
2073 sll(index, Interpreter::logStackElementSize, index);
2074 sub(Llocals, index, index);
2075 #ifdef ASSERT
2076 check_for_regarea_stomp(index, Interpreter::local_offset_in_bytes(1), FP, G1_scratch, G4_scratch);
2077 #endif
2078 store_unaligned_double(src, index, Interpreter::local_offset_in_bytes(1));
2079 }
2080
2081
2082 int InterpreterMacroAssembler::top_most_monitor_byte_offset() {
2083 const jint delta = frame::interpreter_frame_monitor_size() * wordSize;
2084 int rounded_vm_local_words = ::round_to(frame::interpreter_frame_vm_local_words, WordsPerLong);
2085 return ((-rounded_vm_local_words * wordSize) - delta ) + STACK_BIAS;
2086 }
2087
2088
2089 Address InterpreterMacroAssembler::top_most_monitor() {
2090 return Address(FP, top_most_monitor_byte_offset());
2091 }
2092
2093
2094 void InterpreterMacroAssembler::compute_stack_base( Register Rdest ) {
2095 add( Lesp, wordSize, Rdest );
2096 }
2097
2098 #endif /* CC_INTERP */
2099
2100 void InterpreterMacroAssembler::increment_invocation_counter( Register Rtmp, Register Rtmp2 ) {
2101 assert(UseCompiler, "incrementing must be useful");
2102 #ifdef CC_INTERP
2103 Address inv_counter(G5_method, methodOopDesc::invocation_counter_offset() +
2104 InvocationCounter::counter_offset());
2105 Address be_counter (G5_method, methodOopDesc::backedge_counter_offset() +
2106 InvocationCounter::counter_offset());
2107 #else
2108 Address inv_counter(Lmethod, methodOopDesc::invocation_counter_offset() +
2109 InvocationCounter::counter_offset());
2110 Address be_counter (Lmethod, methodOopDesc::backedge_counter_offset() +
2111 InvocationCounter::counter_offset());
2112 #endif /* CC_INTERP */
2113 int delta = InvocationCounter::count_increment;
2114
2115 // Load each counter in a register
2116 ld( inv_counter, Rtmp );
2117 ld( be_counter, Rtmp2 );
2118
2119 assert( is_simm13( delta ), " delta too large.");
2120
2121 // Add the delta to the invocation counter and store the result
2122 add( Rtmp, delta, Rtmp );
2123
2124 // Mask the backedge counter
2125 and3( Rtmp2, InvocationCounter::count_mask_value, Rtmp2 );
2126
2127 // Store value
2128 st( Rtmp, inv_counter);
2129
2130 // Add invocation counter + backedge counter
2131 add( Rtmp, Rtmp2, Rtmp);
2132
2133 // Note that this macro must leave the backedge_count + invocation_count in Rtmp!
2134 }
2135
2136 void InterpreterMacroAssembler::increment_backedge_counter( Register Rtmp, Register Rtmp2 ) {
2137 assert(UseCompiler, "incrementing must be useful");
2138 #ifdef CC_INTERP
2139 Address be_counter (G5_method, methodOopDesc::backedge_counter_offset() +
2140 InvocationCounter::counter_offset());
2141 Address inv_counter(G5_method, methodOopDesc::invocation_counter_offset() +
2142 InvocationCounter::counter_offset());
2143 #else
2144 Address be_counter (Lmethod, methodOopDesc::backedge_counter_offset() +
2145 InvocationCounter::counter_offset());
2146 Address inv_counter(Lmethod, methodOopDesc::invocation_counter_offset() +
2147 InvocationCounter::counter_offset());
2148 #endif /* CC_INTERP */
2149 int delta = InvocationCounter::count_increment;
2150 // Load each counter in a register
2151 ld( be_counter, Rtmp );
2152 ld( inv_counter, Rtmp2 );
2153
2154 // Add the delta to the backedge counter
2155 add( Rtmp, delta, Rtmp );
2156
2157 // Mask the invocation counter, add to backedge counter
2158 and3( Rtmp2, InvocationCounter::count_mask_value, Rtmp2 );
2159
2160 // and store the result to memory
2161 st( Rtmp, be_counter );
2162
2163 // Add backedge + invocation counter
2164 add( Rtmp, Rtmp2, Rtmp );
2165
2166 // Note that this macro must leave backedge_count + invocation_count in Rtmp!
2167 }
2168
2169 #ifndef CC_INTERP
2170 void InterpreterMacroAssembler::test_backedge_count_for_osr( Register backedge_count,
2171 Register branch_bcp,
2172 Register Rtmp ) {
2173 Label did_not_overflow;
2174 Label overflow_with_error;
2175 assert_different_registers(backedge_count, Rtmp, branch_bcp);
2176 assert(UseOnStackReplacement,"Must UseOnStackReplacement to test_backedge_count_for_osr");
2177
2178 AddressLiteral limit(&InvocationCounter::InterpreterBackwardBranchLimit);
2179 load_contents(limit, Rtmp);
2180 cmp(backedge_count, Rtmp);
2181 br(Assembler::lessUnsigned, false, Assembler::pt, did_not_overflow);
2182 delayed()->nop();
2183
2184 // When ProfileInterpreter is on, the backedge_count comes from the
2185 // methodDataOop, which value does not get reset on the call to
2186 // frequency_counter_overflow(). To avoid excessive calls to the overflow
2187 // routine while the method is being compiled, add a second test to make sure
2188 // the overflow function is called only once every overflow_frequency.
2189 if (ProfileInterpreter) {
2190 const int overflow_frequency = 1024;
2191 andcc(backedge_count, overflow_frequency-1, Rtmp);
2192 brx(Assembler::notZero, false, Assembler::pt, did_not_overflow);
2193 delayed()->nop();
2194 }
2195
2196 // overflow in loop, pass branch bytecode
2197 set(6,Rtmp);
2198 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), branch_bcp, Rtmp);
2199
2200 // Was an OSR adapter generated?
2201 // O0 = osr nmethod
2202 tst(O0);
2203 brx(Assembler::zero, false, Assembler::pn, overflow_with_error);
2204 delayed()->nop();
2205
2206 // Has the nmethod been invalidated already?
2207 ld(O0, nmethod::entry_bci_offset(), O2);
2208 cmp(O2, InvalidOSREntryBci);
2209 br(Assembler::equal, false, Assembler::pn, overflow_with_error);
2210 delayed()->nop();
2211
2212 // migrate the interpreter frame off of the stack
2213
2214 mov(G2_thread, L7);
2215 // save nmethod
2216 mov(O0, L6);
2217 set_last_Java_frame(SP, noreg);
2218 call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin), L7);
2219 reset_last_Java_frame();
2220 mov(L7, G2_thread);
2221
2222 // move OSR nmethod to I1
2223 mov(L6, I1);
2224
2225 // OSR buffer to I0
2226 mov(O0, I0);
2227
2228 // remove the interpreter frame
2229 restore(I5_savedSP, 0, SP);
2230
2231 // Jump to the osr code.
2232 ld_ptr(O1, nmethod::osr_entry_point_offset(), O2);
2233 jmp(O2, G0);
2234 delayed()->nop();
2235
2236 bind(overflow_with_error);
2237
2238 bind(did_not_overflow);
2239 }
2240
2241
2242
2243 void InterpreterMacroAssembler::interp_verify_oop(Register reg, TosState state, const char * file, int line) {
2244 if (state == atos) { MacroAssembler::_verify_oop(reg, "broken oop ", file, line); }
2245 }
2246
2247
2248 // local helper function for the verify_oop_or_return_address macro
2249 static bool verify_return_address(methodOopDesc* m, int bci) {
2250 #ifndef PRODUCT
2251 address pc = (address)(m->constMethod())
2252 + in_bytes(constMethodOopDesc::codes_offset()) + bci;
2253 // assume it is a valid return address if it is inside m and is preceded by a jsr
2254 if (!m->contains(pc)) return false;
2255 address jsr_pc;
2256 jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr);
2257 if (*jsr_pc == Bytecodes::_jsr && jsr_pc >= m->code_base()) return true;
2258 jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr_w);
2259 if (*jsr_pc == Bytecodes::_jsr_w && jsr_pc >= m->code_base()) return true;
2260 #endif // PRODUCT
2261 return false;
2262 }
2263
2264
2265 void InterpreterMacroAssembler::verify_oop_or_return_address(Register reg, Register Rtmp) {
2266 if (!VerifyOops) return;
2267 // the VM documentation for the astore[_wide] bytecode allows
2268 // the TOS to be not only an oop but also a return address
2269 Label test;
2270 Label skip;
2271 // See if it is an address (in the current method):
2272
2273 mov(reg, Rtmp);
2274 const int log2_bytecode_size_limit = 16;
2275 srl(Rtmp, log2_bytecode_size_limit, Rtmp);
2276 br_notnull( Rtmp, false, pt, test );
2277 delayed()->nop();
2278
2279 // %%% should use call_VM_leaf here?
2280 save_frame_and_mov(0, Lmethod, O0, reg, O1);
2281 save_thread(L7_thread_cache);
2282 call(CAST_FROM_FN_PTR(address,verify_return_address), relocInfo::none);
2283 delayed()->nop();
2284 restore_thread(L7_thread_cache);
2285 br_notnull( O0, false, pt, skip );
2286 delayed()->restore();
2287
2288 // Perform a more elaborate out-of-line call
2289 // Not an address; verify it:
2290 bind(test);
2291 verify_oop(reg);
2292 bind(skip);
2293 }
2294
2295
2296 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
2297 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
2298 }
2299 #endif /* CC_INTERP */
2300
2301 // Inline assembly for:
2302 //
2303 // if (thread is in interp_only_mode) {
2304 // InterpreterRuntime::post_method_entry();
2305 // }
2306 // if (DTraceMethodProbes) {
2307 // SharedRuntime::dtrace_method_entry(method, receiver);
2308 // }
2309 // if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
2310 // SharedRuntime::rc_trace_method_entry(method, receiver);
2311 // }
2312
2313 void InterpreterMacroAssembler::notify_method_entry() {
2314
2315 // C++ interpreter only uses this for native methods.
2316
2317 // Whenever JVMTI puts a thread in interp_only_mode, method
2318 // entry/exit events are sent for that thread to track stack
2319 // depth. If it is possible to enter interp_only_mode we add
2320 // the code to check if the event should be sent.
2321 if (JvmtiExport::can_post_interpreter_events()) {
2322 Label L;
2323 Register temp_reg = O5;
2324 const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset());
2325 ld(interp_only, temp_reg);
2326 tst(temp_reg);
2327 br(zero, false, pt, L);
2328 delayed()->nop();
2329 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry));
2330 bind(L);
2331 }
2332
2333 {
2334 Register temp_reg = O5;
2335 SkipIfEqual skip_if(this, temp_reg, &DTraceMethodProbes, zero);
2336 call_VM_leaf(noreg,
2337 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
2338 G2_thread, Lmethod);
2339 }
2340
2341 // RedefineClasses() tracing support for obsolete method entry
2342 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
2343 call_VM_leaf(noreg,
2344 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
2345 G2_thread, Lmethod);
2346 }
2347 }
2348
2349
2350 // Inline assembly for:
2351 //
2352 // if (thread is in interp_only_mode) {
2353 // // save result
2354 // InterpreterRuntime::post_method_exit();
2355 // // restore result
2356 // }
2357 // if (DTraceMethodProbes) {
2358 // SharedRuntime::dtrace_method_exit(thread, method);
2359 // }
2360 //
2361 // Native methods have their result stored in d_tmp and l_tmp
2362 // Java methods have their result stored in the expression stack
2363
2364 void InterpreterMacroAssembler::notify_method_exit(bool is_native_method,
2365 TosState state,
2366 NotifyMethodExitMode mode) {
2367 // C++ interpreter only uses this for native methods.
2368
2369 // Whenever JVMTI puts a thread in interp_only_mode, method
2370 // entry/exit events are sent for that thread to track stack
2371 // depth. If it is possible to enter interp_only_mode we add
2372 // the code to check if the event should be sent.
2373 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
2374 Label L;
2375 Register temp_reg = O5;
2376 const Address interp_only(G2_thread, JavaThread::interp_only_mode_offset());
2377 ld(interp_only, temp_reg);
2378 tst(temp_reg);
2379 br(zero, false, pt, L);
2380 delayed()->nop();
2381
2382 // Note: frame::interpreter_frame_result has a dependency on how the
2383 // method result is saved across the call to post_method_exit. For
2384 // native methods it assumes the result registers are saved to
2385 // l_scratch and d_scratch. If this changes then the interpreter_frame_result
2386 // implementation will need to be updated too.
2387
2388 save_return_value(state, is_native_method);
2389 call_VM(noreg,
2390 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
2391 restore_return_value(state, is_native_method);
2392 bind(L);
2393 }
2394
2395 {
2396 Register temp_reg = O5;
2397 // Dtrace notification
2398 SkipIfEqual skip_if(this, temp_reg, &DTraceMethodProbes, zero);
2399 save_return_value(state, is_native_method);
2400 call_VM_leaf(
2401 noreg,
2402 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
2403 G2_thread, Lmethod);
2404 restore_return_value(state, is_native_method);
2405 }
2406 }
2407
2408 void InterpreterMacroAssembler::save_return_value(TosState state, bool is_native_call) {
2409 #ifdef CC_INTERP
2410 // result potentially in O0/O1: save it across calls
2411 stf(FloatRegisterImpl::D, F0, STATE(_native_fresult));
2412 #ifdef _LP64
2413 stx(O0, STATE(_native_lresult));
2414 #else
2415 std(O0, STATE(_native_lresult));
2416 #endif
2417 #else // CC_INTERP
2418 if (is_native_call) {
2419 stf(FloatRegisterImpl::D, F0, d_tmp);
2420 #ifdef _LP64
2421 stx(O0, l_tmp);
2422 #else
2423 std(O0, l_tmp);
2424 #endif
2425 } else {
2426 push(state);
2427 }
2428 #endif // CC_INTERP
2429 }
2430
2431 void InterpreterMacroAssembler::restore_return_value( TosState state, bool is_native_call) {
2432 #ifdef CC_INTERP
2433 ldf(FloatRegisterImpl::D, STATE(_native_fresult), F0);
2434 #ifdef _LP64
2435 ldx(STATE(_native_lresult), O0);
2436 #else
2437 ldd(STATE(_native_lresult), O0);
2438 #endif
2439 #else // CC_INTERP
2440 if (is_native_call) {
2441 ldf(FloatRegisterImpl::D, d_tmp, F0);
2442 #ifdef _LP64
2443 ldx(l_tmp, O0);
2444 #else
2445 ldd(l_tmp, O0);
2446 #endif
2447 } else {
2448 pop(state);
2449 }
2450 #endif // CC_INTERP
2451 }
2452
2453 // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
2454 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
2455 int increment, int mask,
2456 Register scratch1, Register scratch2,
2457 Condition cond, Label *where) {
2458 ld(counter_addr, scratch1);
2459 add(scratch1, increment, scratch1);
2460 if (is_simm13(mask)) {
2461 andcc(scratch1, mask, G0);
2462 } else {
2463 set(mask, scratch2);
2464 andcc(scratch1, scratch2, G0);
2465 }
2466 br(cond, false, Assembler::pn, *where);
2467 delayed()->st(scratch1, counter_addr);
2468 }