1 /*
2 * Copyright (c) 1999, 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 "c1/c1_Defs.hpp"
27 #include "c1/c1_MacroAssembler.hpp"
28 #include "c1/c1_Runtime1.hpp"
29 #include "ci/ciUtilities.hpp"
30 #include "gc/shared/cardTable.hpp"
31 #include "gc/shared/cardTableBarrierSet.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "nativeInst_sparc.hpp"
34 #include "oops/compiledICHolder.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/jvmtiExport.hpp"
37 #include "runtime/sharedRuntime.hpp"
38 #include "runtime/signature.hpp"
39 #include "runtime/vframeArray.hpp"
40 #include "utilities/macros.hpp"
41 #include "utilities/align.hpp"
42 #include "vmreg_sparc.inline.hpp"
43 #if INCLUDE_ALL_GCS
44 #include "gc/g1/g1BarrierSet.hpp"
45 #include "gc/g1/g1CardTable.hpp"
46 #endif
47
48 // Implementation of StubAssembler
49
50 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) {
51 // for sparc changing the number of arguments doesn't change
52 // anything about the frame size so we'll always lie and claim that
53 // we are only passing 1 argument.
54 set_num_rt_args(1);
55
56 assert_not_delayed();
57 // bang stack before going to runtime
58 set(-os::vm_page_size() + STACK_BIAS, G3_scratch);
59 st(G0, SP, G3_scratch);
60
61 // debugging support
62 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
63
64 set_last_Java_frame(SP, noreg);
65 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early
66 save_thread(L7_thread_cache);
67 // do the call
68 call(entry_point, relocInfo::runtime_call_type);
69 if (!VerifyThread) {
70 delayed()->mov(G2_thread, O0); // pass thread as first argument
71 } else {
72 delayed()->nop(); // (thread already passed)
73 }
74 int call_offset = offset(); // offset of return address
75 restore_thread(L7_thread_cache);
76 reset_last_Java_frame();
77
78 // check for pending exceptions
79 { Label L;
80 Address exception_addr(G2_thread, Thread::pending_exception_offset());
81 ld_ptr(exception_addr, Gtemp);
82 br_null_short(Gtemp, pt, L);
83 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
84 st_ptr(G0, vm_result_addr);
85 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
86 st_ptr(G0, vm_result_addr_2);
87
88 if (frame_size() == no_frame_size) {
89 // we use O7 linkage so that forward_exception_entry has the issuing PC
90 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
91 delayed()->restore();
92 } else if (_stub_id == Runtime1::forward_exception_id) {
93 should_not_reach_here();
94 } else {
95 AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id));
96 jump_to(exc, G4);
97 delayed()->nop();
98 }
99 bind(L);
100 }
101
102 // get oop result if there is one and reset the value in the thread
103 if (oop_result1->is_valid()) { // get oop result if there is one and reset it in the thread
104 get_vm_result (oop_result1);
105 } else {
106 // be a little paranoid and clear the result
107 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
108 st_ptr(G0, vm_result_addr);
109 }
110
111 // get second result if there is one and reset the value in the thread
112 if (metadata_result->is_valid()) {
113 get_vm_result_2 (metadata_result);
114 } else {
115 // be a little paranoid and clear the result
116 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
117 st_ptr(G0, vm_result_addr_2);
118 }
119
120 return call_offset;
121 }
122
123
124 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
125 // O0 is reserved for the thread
126 mov(arg1, O1);
127 return call_RT(oop_result1, metadata_result, entry, 1);
128 }
129
130
131 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
132 // O0 is reserved for the thread
133 mov(arg1, O1);
134 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
135 return call_RT(oop_result1, metadata_result, entry, 2);
136 }
137
138
139 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
140 // O0 is reserved for the thread
141 mov(arg1, O1);
142 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
143 mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument");
144 return call_RT(oop_result1, metadata_result, entry, 3);
145 }
146
147
148 // Implementation of Runtime1
149
150 #define __ sasm->
151
152 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
153 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
154 static int reg_save_size_in_words;
155 static int frame_size_in_bytes = -1;
156
157 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
158 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
159 "mismatch in calculation");
160 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
161 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
162 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
163
164 int i;
165 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
166 Register r = as_Register(i);
167 if (r == G1 || r == G3 || r == G4 || r == G5) {
168 int sp_offset = cpu_reg_save_offsets[i];
169 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
170 r->as_VMReg());
171 }
172 }
173
174 if (save_fpu_registers) {
175 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
176 FloatRegister r = as_FloatRegister(i);
177 int sp_offset = fpu_reg_save_offsets[i];
178 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
179 r->as_VMReg());
180 }
181 }
182 return oop_map;
183 }
184
185 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) {
186 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
187 "mismatch in calculation");
188 __ save_frame_c1(frame_size_in_bytes);
189
190 // Record volatile registers as callee-save values in an OopMap so their save locations will be
191 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for
192 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers
193 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame
194 // (as the stub's I's) when the runtime routine called by the stub creates its frame.
195 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint))
196
197 int i;
198 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
199 Register r = as_Register(i);
200 if (r == G1 || r == G3 || r == G4 || r == G5) {
201 int sp_offset = cpu_reg_save_offsets[i];
202 __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
203 }
204 }
205
206 if (save_fpu_registers) {
207 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
208 FloatRegister r = as_FloatRegister(i);
209 int sp_offset = fpu_reg_save_offsets[i];
210 __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
211 }
212 }
213
214 return generate_oop_map(sasm, save_fpu_registers);
215 }
216
217 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
218 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
219 Register r = as_Register(i);
220 if (r == G1 || r == G3 || r == G4 || r == G5) {
221 __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
222 }
223 }
224
225 if (restore_fpu_registers) {
226 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
227 FloatRegister r = as_FloatRegister(i);
228 __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
229 }
230 }
231 }
232
233
234 void Runtime1::initialize_pd() {
235 // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines
236 //
237 // A stub routine will have a frame that is at least large enough to hold
238 // a register window save area (obviously) and the volatile g registers
239 // and floating registers. A user of save_live_registers can have a frame
240 // that has more scratch area in it (although typically they will use L-regs).
241 // in that case the frame will look like this (stack growing down)
242 //
243 // FP -> | |
244 // | scratch mem |
245 // | " " |
246 // --------------
247 // | float regs |
248 // | " " |
249 // ---------------
250 // | G regs |
251 // | " " |
252 // ---------------
253 // | abi reg. |
254 // | window save |
255 // | area |
256 // SP -> ---------------
257 //
258 int i;
259 int sp_offset = align_up((int)frame::register_save_words, 2); // start doubleword aligned
260
261 // only G int registers are saved explicitly; others are found in register windows
262 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
263 Register r = as_Register(i);
264 if (r == G1 || r == G3 || r == G4 || r == G5) {
265 cpu_reg_save_offsets[i] = sp_offset;
266 sp_offset++;
267 }
268 }
269
270 // all float registers are saved explicitly
271 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
272 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
273 fpu_reg_save_offsets[i] = sp_offset;
274 sp_offset++;
275 }
276 reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset;
277 // this should match assembler::total_frame_size_in_bytes, which
278 // isn't callable from this context. It's checked by an assert when
279 // it's used though.
280 frame_size_in_bytes = align_up(sp_offset * wordSize, 8);
281 }
282
283
284 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
285 // make a frame and preserve the caller's caller-save registers
286 OopMap* oop_map = save_live_registers(sasm);
287 int call_offset;
288 if (!has_argument) {
289 call_offset = __ call_RT(noreg, noreg, target);
290 } else {
291 call_offset = __ call_RT(noreg, noreg, target, G4);
292 }
293 OopMapSet* oop_maps = new OopMapSet();
294 oop_maps->add_gc_map(call_offset, oop_map);
295
296 __ should_not_reach_here();
297 return oop_maps;
298 }
299
300
301 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
302 Register arg1, Register arg2, Register arg3) {
303 // make a frame and preserve the caller's caller-save registers
304 OopMap* oop_map = save_live_registers(sasm);
305
306 int call_offset;
307 if (arg1 == noreg) {
308 call_offset = __ call_RT(result, noreg, target);
309 } else if (arg2 == noreg) {
310 call_offset = __ call_RT(result, noreg, target, arg1);
311 } else if (arg3 == noreg) {
312 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
313 } else {
314 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
315 }
316 OopMapSet* oop_maps = NULL;
317
318 oop_maps = new OopMapSet();
319 oop_maps->add_gc_map(call_offset, oop_map);
320 restore_live_registers(sasm);
321
322 __ ret();
323 __ delayed()->restore();
324
325 return oop_maps;
326 }
327
328
329 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
330 // make a frame and preserve the caller's caller-save registers
331 OopMap* oop_map = save_live_registers(sasm);
332
333 // call the runtime patching routine, returns non-zero if nmethod got deopted.
334 int call_offset = __ call_RT(noreg, noreg, target);
335 OopMapSet* oop_maps = new OopMapSet();
336 oop_maps->add_gc_map(call_offset, oop_map);
337
338 // re-execute the patched instruction or, if the nmethod was deoptmized, return to the
339 // deoptimization handler entry that will cause re-execution of the current bytecode
340 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
341 assert(deopt_blob != NULL, "deoptimization blob must have been created");
342
343 Label no_deopt;
344 __ br_null_short(O0, Assembler::pt, no_deopt);
345
346 // return to the deoptimization handler entry for unpacking and rexecute
347 // if we simply returned the we'd deopt as if any call we patched had just
348 // returned.
349
350 restore_live_registers(sasm);
351
352 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
353 __ jump_to(dest, O0);
354 __ delayed()->restore();
355
356 __ bind(no_deopt);
357 restore_live_registers(sasm);
358 __ ret();
359 __ delayed()->restore();
360
361 return oop_maps;
362 }
363
364 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
365
366 OopMapSet* oop_maps = NULL;
367 // for better readability
368 const bool must_gc_arguments = true;
369 const bool dont_gc_arguments = false;
370
371 // stub code & info for the different stubs
372 switch (id) {
373 case forward_exception_id:
374 {
375 oop_maps = generate_handle_exception(id, sasm);
376 }
377 break;
378
379 case new_instance_id:
380 case fast_new_instance_id:
381 case fast_new_instance_init_check_id:
382 {
383 Register G5_klass = G5; // Incoming
384 Register O0_obj = O0; // Outgoing
385
386 if (id == new_instance_id) {
387 __ set_info("new_instance", dont_gc_arguments);
388 } else if (id == fast_new_instance_id) {
389 __ set_info("fast new_instance", dont_gc_arguments);
390 } else {
391 assert(id == fast_new_instance_init_check_id, "bad StubID");
392 __ set_info("fast new_instance init check", dont_gc_arguments);
393 }
394
395 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
396 UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
397 Label slow_path;
398 Register G1_obj_size = G1;
399 Register G3_t1 = G3;
400 Register G4_t2 = G4;
401 assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2);
402
403 // Push a frame since we may do dtrace notification for the
404 // allocation which requires calling out and we don't want
405 // to stomp the real return address.
406 __ save_frame(0);
407
408 if (id == fast_new_instance_init_check_id) {
409 // make sure the klass is initialized
410 __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1);
411 __ cmp(G3_t1, InstanceKlass::fully_initialized);
412 __ br(Assembler::notEqual, false, Assembler::pn, slow_path);
413 __ delayed()->nop();
414 }
415 #ifdef ASSERT
416 // assert object can be fast path allocated
417 {
418 Label ok, not_ok;
419 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
420 // make sure it's an instance (LH > 0)
421 __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok);
422 __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size);
423 __ br(Assembler::zero, false, Assembler::pn, ok);
424 __ delayed()->nop();
425 __ bind(not_ok);
426 __ stop("assert(can be fast path allocated)");
427 __ should_not_reach_here();
428 __ bind(ok);
429 }
430 #endif // ASSERT
431
432 // If we got here then the TLAB allocation failed, so try allocating directly from eden.
433 // get the instance size
434 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
435 __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path);
436 __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2);
437
438 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2, /* is_tlab_allocated */ false);
439 __ verify_oop(O0_obj);
440 __ mov(O0, I0);
441 __ ret();
442 __ delayed()->restore();
443
444 __ bind(slow_path);
445
446 // pop this frame so generate_stub_call can push it's own
447 __ restore();
448 }
449
450 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass);
451 // I0->O0: new instance
452 }
453
454 break;
455
456 case counter_overflow_id:
457 // G4 contains bci, G5 contains method
458 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5);
459 break;
460
461 case new_type_array_id:
462 case new_object_array_id:
463 {
464 Register G5_klass = G5; // Incoming
465 Register G4_length = G4; // Incoming
466 Register O0_obj = O0; // Outgoing
467
468 Address klass_lh(G5_klass, Klass::layout_helper_offset());
469 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
470 assert(Klass::_lh_header_size_mask == 0xFF, "bytewise");
471 // Use this offset to pick out an individual byte of the layout_helper:
472 const int klass_lh_header_size_offset = ((BytesPerInt - 1) // 3 - 2 selects byte {0,1,0,0}
473 - Klass::_lh_header_size_shift / BitsPerByte);
474
475 if (id == new_type_array_id) {
476 __ set_info("new_type_array", dont_gc_arguments);
477 } else {
478 __ set_info("new_object_array", dont_gc_arguments);
479 }
480
481 #ifdef ASSERT
482 // assert object type is really an array of the proper kind
483 {
484 Label ok;
485 Register G3_t1 = G3;
486 __ ld(klass_lh, G3_t1);
487 __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1);
488 int tag = ((id == new_type_array_id)
489 ? Klass::_lh_array_tag_type_value
490 : Klass::_lh_array_tag_obj_value);
491 __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok);
492 __ stop("assert(is an array klass)");
493 __ should_not_reach_here();
494 __ bind(ok);
495 }
496 #endif // ASSERT
497
498 if (id == new_type_array_id) {
499 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length);
500 } else {
501 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length);
502 }
503 // I0 -> O0: new array
504 }
505 break;
506
507 case new_multi_array_id:
508 { // O0: klass
509 // O1: rank
510 // O2: address of 1st dimension
511 __ set_info("new_multi_array", dont_gc_arguments);
512 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2);
513 // I0 -> O0: new multi array
514 }
515 break;
516
517 case register_finalizer_id:
518 {
519 __ set_info("register_finalizer", dont_gc_arguments);
520
521 // load the klass and check the has finalizer flag
522 Label register_finalizer;
523 Register t = O1;
524 __ load_klass(O0, t);
525 __ ld(t, in_bytes(Klass::access_flags_offset()), t);
526 __ set(JVM_ACC_HAS_FINALIZER, G3);
527 __ andcc(G3, t, G0);
528 __ br(Assembler::notZero, false, Assembler::pt, register_finalizer);
529 __ delayed()->nop();
530
531 // do a leaf return
532 __ retl();
533 __ delayed()->nop();
534
535 __ bind(register_finalizer);
536 OopMap* oop_map = save_live_registers(sasm);
537 int call_offset = __ call_RT(noreg, noreg,
538 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0);
539 oop_maps = new OopMapSet();
540 oop_maps->add_gc_map(call_offset, oop_map);
541
542 // Now restore all the live registers
543 restore_live_registers(sasm);
544
545 __ ret();
546 __ delayed()->restore();
547 }
548 break;
549
550 case throw_range_check_failed_id:
551 { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded
552 // G4: index
553 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
554 }
555 break;
556
557 case throw_index_exception_id:
558 { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded
559 // G4: index
560 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
561 }
562 break;
563
564 case throw_div0_exception_id:
565 { __ set_info("throw_div0_exception", dont_gc_arguments);
566 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
567 }
568 break;
569
570 case throw_null_pointer_exception_id:
571 { __ set_info("throw_null_pointer_exception", dont_gc_arguments);
572 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
573 }
574 break;
575
576 case handle_exception_id:
577 { __ set_info("handle_exception", dont_gc_arguments);
578 oop_maps = generate_handle_exception(id, sasm);
579 }
580 break;
581
582 case handle_exception_from_callee_id:
583 { __ set_info("handle_exception_from_callee", dont_gc_arguments);
584 oop_maps = generate_handle_exception(id, sasm);
585 }
586 break;
587
588 case unwind_exception_id:
589 {
590 // O0: exception
591 // I7: address of call to this method
592
593 __ set_info("unwind_exception", dont_gc_arguments);
594 __ mov(Oexception, Oexception->after_save());
595 __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());
596
597 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
598 G2_thread, Oissuing_pc->after_save());
599 __ verify_not_null_oop(Oexception->after_save());
600
601 // Restore SP from L7 if the exception PC is a method handle call site.
602 __ mov(O0, G5); // Save the target address.
603 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
604 __ tst(L0); // Condition codes are preserved over the restore.
605 __ restore();
606
607 __ jmp(G5, 0);
608 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
609 }
610 break;
611
612 case throw_array_store_exception_id:
613 {
614 __ set_info("throw_array_store_exception", dont_gc_arguments);
615 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
616 }
617 break;
618
619 case throw_class_cast_exception_id:
620 {
621 // G4: object
622 __ set_info("throw_class_cast_exception", dont_gc_arguments);
623 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
624 }
625 break;
626
627 case throw_incompatible_class_change_error_id:
628 {
629 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
630 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
631 }
632 break;
633
634 case slow_subtype_check_id:
635 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
636 // Arguments :
637 //
638 // ret : G3
639 // sub : G3, argument, destroyed
640 // super: G1, argument, not changed
641 // raddr: O7, blown by call
642 Label miss;
643
644 __ save_frame(0); // Blow no registers!
645
646 __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss);
647
648 __ mov(1, G3);
649 __ ret(); // Result in G5 is 'true'
650 __ delayed()->restore(); // free copy or add can go here
651
652 __ bind(miss);
653 __ mov(0, G3);
654 __ ret(); // Result in G5 is 'false'
655 __ delayed()->restore(); // free copy or add can go here
656 }
657
658 case monitorenter_nofpu_id:
659 case monitorenter_id:
660 { // G4: object
661 // G5: lock address
662 __ set_info("monitorenter", dont_gc_arguments);
663
664 int save_fpu_registers = (id == monitorenter_id);
665 // make a frame and preserve the caller's caller-save registers
666 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
667
668 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5);
669
670 oop_maps = new OopMapSet();
671 oop_maps->add_gc_map(call_offset, oop_map);
672 restore_live_registers(sasm, save_fpu_registers);
673
674 __ ret();
675 __ delayed()->restore();
676 }
677 break;
678
679 case monitorexit_nofpu_id:
680 case monitorexit_id:
681 { // G4: lock address
682 // note: really a leaf routine but must setup last java sp
683 // => use call_RT for now (speed can be improved by
684 // doing last java sp setup manually)
685 __ set_info("monitorexit", dont_gc_arguments);
686
687 int save_fpu_registers = (id == monitorexit_id);
688 // make a frame and preserve the caller's caller-save registers
689 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
690
691 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4);
692
693 oop_maps = new OopMapSet();
694 oop_maps->add_gc_map(call_offset, oop_map);
695 restore_live_registers(sasm, save_fpu_registers);
696
697 __ ret();
698 __ delayed()->restore();
699 }
700 break;
701
702 case deoptimize_id:
703 {
704 __ set_info("deoptimize", dont_gc_arguments);
705 OopMap* oop_map = save_live_registers(sasm);
706 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), G4);
707 oop_maps = new OopMapSet();
708 oop_maps->add_gc_map(call_offset, oop_map);
709 restore_live_registers(sasm);
710 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
711 assert(deopt_blob != NULL, "deoptimization blob must have been created");
712 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
713 __ jump_to(dest, O0);
714 __ delayed()->restore();
715 }
716 break;
717
718 case access_field_patching_id:
719 { __ set_info("access_field_patching", dont_gc_arguments);
720 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
721 }
722 break;
723
724 case load_klass_patching_id:
725 { __ set_info("load_klass_patching", dont_gc_arguments);
726 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
727 }
728 break;
729
730 case load_mirror_patching_id:
731 { __ set_info("load_mirror_patching", dont_gc_arguments);
732 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
733 }
734 break;
735
736 case load_appendix_patching_id:
737 { __ set_info("load_appendix_patching", dont_gc_arguments);
738 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
739 }
740 break;
741
742 case dtrace_object_alloc_id:
743 { // O0: object
744 __ set_info("dtrace_object_alloc", dont_gc_arguments);
745 // we can't gc here so skip the oopmap but make sure that all
746 // the live registers get saved.
747 save_live_registers(sasm);
748
749 __ save_thread(L7_thread_cache);
750 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
751 relocInfo::runtime_call_type);
752 __ delayed()->mov(I0, O0);
753 __ restore_thread(L7_thread_cache);
754
755 restore_live_registers(sasm);
756 __ ret();
757 __ delayed()->restore();
758 }
759 break;
760
761 #if INCLUDE_ALL_GCS
762 case g1_pre_barrier_slow_id:
763 { // G4: previous value of memory
764 BarrierSet* bs = Universe::heap()->barrier_set();
765 if (bs->kind() != BarrierSet::G1BarrierSet) {
766 __ save_frame(0);
767 __ set((int)id, O1);
768 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
769 __ should_not_reach_here();
770 break;
771 }
772
773 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
774
775 Register pre_val = G4;
776 Register tmp = G1_scratch;
777 Register tmp2 = G3_scratch;
778
779 Label refill, restart;
780 int satb_q_active_byte_offset =
781 in_bytes(JavaThread::satb_mark_queue_offset() +
782 SATBMarkQueue::byte_offset_of_active());
783 int satb_q_index_byte_offset =
784 in_bytes(JavaThread::satb_mark_queue_offset() +
785 SATBMarkQueue::byte_offset_of_index());
786 int satb_q_buf_byte_offset =
787 in_bytes(JavaThread::satb_mark_queue_offset() +
788 SATBMarkQueue::byte_offset_of_buf());
789
790 // Is marking still active?
791 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
792 __ ld(G2_thread, satb_q_active_byte_offset, tmp);
793 } else {
794 assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
795 __ ldsb(G2_thread, satb_q_active_byte_offset, tmp);
796 }
797 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, restart);
798 __ retl();
799 __ delayed()->nop();
800
801 __ bind(restart);
802 // Load the index into the SATB buffer. SATBMarkQueue::_index is a
803 // size_t so ld_ptr is appropriate
804 __ ld_ptr(G2_thread, satb_q_index_byte_offset, tmp);
805
806 // index == 0?
807 __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pn, refill);
808
809 __ ld_ptr(G2_thread, satb_q_buf_byte_offset, tmp2);
810 __ sub(tmp, oopSize, tmp);
811
812 __ st_ptr(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
813 // Use return-from-leaf
814 __ retl();
815 __ delayed()->st_ptr(tmp, G2_thread, satb_q_index_byte_offset);
816
817 __ bind(refill);
818
819 save_live_registers(sasm);
820
821 __ call_VM_leaf(L7_thread_cache,
822 CAST_FROM_FN_PTR(address,
823 SATBMarkQueueSet::handle_zero_index_for_thread),
824 G2_thread);
825
826 restore_live_registers(sasm);
827
828 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
829 __ delayed()->restore();
830 }
831 break;
832
833 case g1_post_barrier_slow_id:
834 {
835 BarrierSet* bs = Universe::heap()->barrier_set();
836 if (bs->kind() != BarrierSet::G1BarrierSet) {
837 __ save_frame(0);
838 __ set((int)id, O1);
839 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
840 __ should_not_reach_here();
841 break;
842 }
843
844 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
845
846 Register addr = G4;
847 Register cardtable = G5;
848 Register tmp = G1_scratch;
849 Register tmp2 = G3_scratch;
850 jbyte* byte_map_base = ci_card_table_address();
851
852 Label not_already_dirty, restart, refill, young_card;
853
854 __ srlx(addr, CardTable::card_shift, addr);
855
856 AddressLiteral rs(byte_map_base);
857 __ set(rs, cardtable); // cardtable := <card table base>
858 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
859
860 __ cmp_and_br_short(tmp, G1CardTable::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card);
861
862 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
863 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
864
865 assert(CardTable::dirty_card_val() == 0, "otherwise check this code");
866 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty);
867
868 __ bind(young_card);
869 // We didn't take the branch, so we're already dirty: return.
870 // Use return-from-leaf
871 __ retl();
872 __ delayed()->nop();
873
874 // Not dirty.
875 __ bind(not_already_dirty);
876
877 // Get cardtable + tmp into a reg by itself
878 __ add(addr, cardtable, tmp2);
879
880 // First, dirty it.
881 __ stb(G0, tmp2, 0); // [cardPtr] := 0 (i.e., dirty).
882
883 Register tmp3 = cardtable;
884 Register tmp4 = tmp;
885
886 // these registers are now dead
887 addr = cardtable = tmp = noreg;
888
889 int dirty_card_q_index_byte_offset =
890 in_bytes(JavaThread::dirty_card_queue_offset() +
891 DirtyCardQueue::byte_offset_of_index());
892 int dirty_card_q_buf_byte_offset =
893 in_bytes(JavaThread::dirty_card_queue_offset() +
894 DirtyCardQueue::byte_offset_of_buf());
895
896 __ bind(restart);
897
898 // Get the index into the update buffer. DirtyCardQueue::_index is
899 // a size_t so ld_ptr is appropriate here.
900 __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, tmp3);
901
902 // index == 0?
903 __ cmp_and_brx_short(tmp3, G0, Assembler::equal, Assembler::pn, refill);
904
905 __ ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, tmp4);
906 __ sub(tmp3, oopSize, tmp3);
907
908 __ st_ptr(tmp2, tmp4, tmp3); // [_buf + index] := <address_of_card>
909 // Use return-from-leaf
910 __ retl();
911 __ delayed()->st_ptr(tmp3, G2_thread, dirty_card_q_index_byte_offset);
912
913 __ bind(refill);
914
915 save_live_registers(sasm);
916
917 __ call_VM_leaf(L7_thread_cache,
918 CAST_FROM_FN_PTR(address,
919 DirtyCardQueueSet::handle_zero_index_for_thread),
920 G2_thread);
921
922 restore_live_registers(sasm);
923
924 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
925 __ delayed()->restore();
926 }
927 break;
928 #endif // INCLUDE_ALL_GCS
929
930 case predicate_failed_trap_id:
931 {
932 __ set_info("predicate_failed_trap", dont_gc_arguments);
933 OopMap* oop_map = save_live_registers(sasm);
934
935 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
936
937 oop_maps = new OopMapSet();
938 oop_maps->add_gc_map(call_offset, oop_map);
939
940 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
941 assert(deopt_blob != NULL, "deoptimization blob must have been created");
942 restore_live_registers(sasm);
943
944 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
945 __ jump_to(dest, O0);
946 __ delayed()->restore();
947 }
948 break;
949
950 default:
951 { __ set_info("unimplemented entry", dont_gc_arguments);
952 __ save_frame(0);
953 __ set((int)id, O1);
954 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1);
955 __ should_not_reach_here();
956 }
957 break;
958 }
959 return oop_maps;
960 }
961
962
963 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
964 __ block_comment("generate_handle_exception");
965
966 // Save registers, if required.
967 OopMapSet* oop_maps = new OopMapSet();
968 OopMap* oop_map = NULL;
969 switch (id) {
970 case forward_exception_id:
971 // We're handling an exception in the context of a compiled frame.
972 // The registers have been saved in the standard places. Perform
973 // an exception lookup in the caller and dispatch to the handler
974 // if found. Otherwise unwind and dispatch to the callers
975 // exception handler.
976 oop_map = generate_oop_map(sasm, true);
977
978 // transfer the pending exception to the exception_oop
979 __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception);
980 __ ld_ptr(Oexception, 0, G0);
981 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset()));
982 __ add(I7, frame::pc_return_offset, Oissuing_pc);
983 break;
984 case handle_exception_id:
985 // At this point all registers MAY be live.
986 oop_map = save_live_registers(sasm);
987 __ mov(Oexception->after_save(), Oexception);
988 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
989 break;
990 case handle_exception_from_callee_id:
991 // At this point all registers except exception oop (Oexception)
992 // and exception pc (Oissuing_pc) are dead.
993 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
994 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
995 __ save_frame_c1(frame_size_in_bytes);
996 __ mov(Oexception->after_save(), Oexception);
997 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
998 break;
999 default: ShouldNotReachHere();
1000 }
1001
1002 __ verify_not_null_oop(Oexception);
1003
1004 #ifdef ASSERT
1005 // check that fields in JavaThread for exception oop and issuing pc are
1006 // empty before writing to them
1007 Label oop_empty;
1008 Register scratch = I7; // We can use I7 here because it's overwritten later anyway.
1009 __ ld_ptr(Address(G2_thread, JavaThread::exception_oop_offset()), scratch);
1010 __ br_null(scratch, false, Assembler::pt, oop_empty);
1011 __ delayed()->nop();
1012 __ stop("exception oop already set");
1013 __ bind(oop_empty);
1014
1015 Label pc_empty;
1016 __ ld_ptr(Address(G2_thread, JavaThread::exception_pc_offset()), scratch);
1017 __ br_null(scratch, false, Assembler::pt, pc_empty);
1018 __ delayed()->nop();
1019 __ stop("exception pc already set");
1020 __ bind(pc_empty);
1021 #endif
1022
1023 // save the exception and issuing pc in the thread
1024 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset()));
1025 __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
1026
1027 // use the throwing pc as the return address to lookup (has bci & oop map)
1028 __ mov(Oissuing_pc, I7);
1029 __ sub(I7, frame::pc_return_offset, I7);
1030 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
1031 oop_maps->add_gc_map(call_offset, oop_map);
1032
1033 // Note: if nmethod has been deoptimized then regardless of
1034 // whether it had a handler or not we will deoptimize
1035 // by entering the deopt blob with a pending exception.
1036
1037 // Restore the registers that were saved at the beginning, remove
1038 // the frame and jump to the exception handler.
1039 switch (id) {
1040 case forward_exception_id:
1041 case handle_exception_id:
1042 restore_live_registers(sasm);
1043 __ jmp(O0, 0);
1044 __ delayed()->restore();
1045 break;
1046 case handle_exception_from_callee_id:
1047 // Restore SP from L7 if the exception PC is a method handle call site.
1048 __ mov(O0, G5); // Save the target address.
1049 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
1050 __ tst(L0); // Condition codes are preserved over the restore.
1051 __ restore();
1052
1053 __ jmp(G5, 0); // jump to the exception handler
1054 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
1055 break;
1056 default: ShouldNotReachHere();
1057 }
1058
1059 return oop_maps;
1060 }
1061
1062
1063 #undef __
1064
1065 const char *Runtime1::pd_name_for_address(address entry) {
1066 return "<unknown function>";
1067 }