1 /*
2 * Copyright (c) 1999, 2015, 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 "interpreter/interpreter.hpp"
30 #include "nativeInst_sparc.hpp"
31 #include "oops/compiledICHolder.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "prims/jvmtiExport.hpp"
34 #include "runtime/sharedRuntime.hpp"
35 #include "runtime/signature.hpp"
36 #include "runtime/vframeArray.hpp"
37 #include "utilities/macros.hpp"
38 #include "vmreg_sparc.inline.hpp"
39 #if INCLUDE_ALL_GCS
40 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
41 #endif
42
43 // Implementation of StubAssembler
44
45 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) {
46 // for sparc changing the number of arguments doesn't change
47 // anything about the frame size so we'll always lie and claim that
48 // we are only passing 1 argument.
49 set_num_rt_args(1);
50
51 assert_not_delayed();
52 // bang stack before going to runtime
53 set(-os::vm_page_size() + STACK_BIAS, G3_scratch);
54 st(G0, SP, G3_scratch);
55
56 // debugging support
57 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
58
59 set_last_Java_frame(SP, noreg);
60 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early
61 save_thread(L7_thread_cache);
62 // do the call
63 call(entry_point, relocInfo::runtime_call_type);
64 if (!VerifyThread) {
65 delayed()->mov(G2_thread, O0); // pass thread as first argument
66 } else {
67 delayed()->nop(); // (thread already passed)
68 }
69 int call_offset = offset(); // offset of return address
70 restore_thread(L7_thread_cache);
71 reset_last_Java_frame();
72
73 // check for pending exceptions
74 { Label L;
75 Address exception_addr(G2_thread, Thread::pending_exception_offset());
76 ld_ptr(exception_addr, Gtemp);
77 br_null_short(Gtemp, pt, L);
78 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
79 st_ptr(G0, vm_result_addr);
80 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
81 st_ptr(G0, vm_result_addr_2);
82
83 if (frame_size() == no_frame_size) {
84 // we use O7 linkage so that forward_exception_entry has the issuing PC
85 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
86 delayed()->restore();
87 } else if (_stub_id == Runtime1::forward_exception_id) {
88 should_not_reach_here();
89 } else {
90 AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id));
91 jump_to(exc, G4);
92 delayed()->nop();
93 }
94 bind(L);
95 }
96
97 // get oop result if there is one and reset the value in the thread
98 if (oop_result1->is_valid()) { // get oop result if there is one and reset it in the thread
99 get_vm_result (oop_result1);
100 } else {
101 // be a little paranoid and clear the result
102 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
103 st_ptr(G0, vm_result_addr);
104 }
105
106 // get second result if there is one and reset the value in the thread
107 if (metadata_result->is_valid()) {
108 get_vm_result_2 (metadata_result);
109 } else {
110 // be a little paranoid and clear the result
111 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
112 st_ptr(G0, vm_result_addr_2);
113 }
114
115 return call_offset;
116 }
117
118
119 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
120 // O0 is reserved for the thread
121 mov(arg1, O1);
122 return call_RT(oop_result1, metadata_result, entry, 1);
123 }
124
125
126 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
127 // O0 is reserved for the thread
128 mov(arg1, O1);
129 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
130 return call_RT(oop_result1, metadata_result, entry, 2);
131 }
132
133
134 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
135 // O0 is reserved for the thread
136 mov(arg1, O1);
137 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
138 mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument");
139 return call_RT(oop_result1, metadata_result, entry, 3);
140 }
141
142
143 // Implementation of Runtime1
144
145 #define __ sasm->
146
147 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
148 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
149 static int reg_save_size_in_words;
150 static int frame_size_in_bytes = -1;
151
152 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
153 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
154 "mismatch in calculation");
155 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
156 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
157 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
158
159 int i;
160 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
161 Register r = as_Register(i);
162 if (r == G1 || r == G3 || r == G4 || r == G5) {
163 int sp_offset = cpu_reg_save_offsets[i];
164 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
165 r->as_VMReg());
166 }
167 }
168
169 if (save_fpu_registers) {
170 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
171 FloatRegister r = as_FloatRegister(i);
172 int sp_offset = fpu_reg_save_offsets[i];
173 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
174 r->as_VMReg());
175 }
176 }
177 return oop_map;
178 }
179
180 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) {
181 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
182 "mismatch in calculation");
183 __ save_frame_c1(frame_size_in_bytes);
184
185 // Record volatile registers as callee-save values in an OopMap so their save locations will be
186 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for
187 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers
188 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame
189 // (as the stub's I's) when the runtime routine called by the stub creates its frame.
190 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint))
191
192 int i;
193 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
194 Register r = as_Register(i);
195 if (r == G1 || r == G3 || r == G4 || r == G5) {
196 int sp_offset = cpu_reg_save_offsets[i];
197 __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
198 }
199 }
200
201 if (save_fpu_registers) {
202 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
203 FloatRegister r = as_FloatRegister(i);
204 int sp_offset = fpu_reg_save_offsets[i];
205 __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
206 }
207 }
208
209 return generate_oop_map(sasm, save_fpu_registers);
210 }
211
212 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
213 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
214 Register r = as_Register(i);
215 if (r == G1 || r == G3 || r == G4 || r == G5) {
216 __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
217 }
218 }
219
220 if (restore_fpu_registers) {
221 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
222 FloatRegister r = as_FloatRegister(i);
223 __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
224 }
225 }
226 }
227
228
229 void Runtime1::initialize_pd() {
230 // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines
231 //
232 // A stub routine will have a frame that is at least large enough to hold
233 // a register window save area (obviously) and the volatile g registers
234 // and floating registers. A user of save_live_registers can have a frame
235 // that has more scratch area in it (although typically they will use L-regs).
236 // in that case the frame will look like this (stack growing down)
237 //
238 // FP -> | |
239 // | scratch mem |
240 // | " " |
241 // --------------
242 // | float regs |
243 // | " " |
244 // ---------------
245 // | G regs |
246 // | " " |
247 // ---------------
248 // | abi reg. |
249 // | window save |
250 // | area |
251 // SP -> ---------------
252 //
253 int i;
254 int sp_offset = round_to(frame::register_save_words, 2); // start doubleword aligned
255
256 // only G int registers are saved explicitly; others are found in register windows
257 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
258 Register r = as_Register(i);
259 if (r == G1 || r == G3 || r == G4 || r == G5) {
260 cpu_reg_save_offsets[i] = sp_offset;
261 sp_offset++;
262 }
263 }
264
265 // all float registers are saved explicitly
266 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
267 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
268 fpu_reg_save_offsets[i] = sp_offset;
269 sp_offset++;
270 }
271 reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset;
272 // this should match assembler::total_frame_size_in_bytes, which
273 // isn't callable from this context. It's checked by an assert when
274 // it's used though.
275 frame_size_in_bytes = align_size_up(sp_offset * wordSize, 8);
276 }
277
278
279 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
280 // make a frame and preserve the caller's caller-save registers
281 OopMap* oop_map = save_live_registers(sasm);
282 int call_offset;
283 if (!has_argument) {
284 call_offset = __ call_RT(noreg, noreg, target);
285 } else {
286 call_offset = __ call_RT(noreg, noreg, target, G4);
287 }
288 OopMapSet* oop_maps = new OopMapSet();
289 oop_maps->add_gc_map(call_offset, oop_map);
290
291 __ should_not_reach_here();
292 return oop_maps;
293 }
294
295
296 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
297 Register arg1, Register arg2, Register arg3) {
298 // make a frame and preserve the caller's caller-save registers
299 OopMap* oop_map = save_live_registers(sasm);
300
301 int call_offset;
302 if (arg1 == noreg) {
303 call_offset = __ call_RT(result, noreg, target);
304 } else if (arg2 == noreg) {
305 call_offset = __ call_RT(result, noreg, target, arg1);
306 } else if (arg3 == noreg) {
307 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
308 } else {
309 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
310 }
311 OopMapSet* oop_maps = NULL;
312
313 oop_maps = new OopMapSet();
314 oop_maps->add_gc_map(call_offset, oop_map);
315 restore_live_registers(sasm);
316
317 __ ret();
318 __ delayed()->restore();
319
320 return oop_maps;
321 }
322
323
324 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
325 // make a frame and preserve the caller's caller-save registers
326 OopMap* oop_map = save_live_registers(sasm);
327
328 // call the runtime patching routine, returns non-zero if nmethod got deopted.
329 int call_offset = __ call_RT(noreg, noreg, target);
330 OopMapSet* oop_maps = new OopMapSet();
331 oop_maps->add_gc_map(call_offset, oop_map);
332
333 // re-execute the patched instruction or, if the nmethod was deoptmized, return to the
334 // deoptimization handler entry that will cause re-execution of the current bytecode
335 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
336 assert(deopt_blob != NULL, "deoptimization blob must have been created");
337
338 Label no_deopt;
339 __ br_null_short(O0, Assembler::pt, no_deopt);
340
341 // return to the deoptimization handler entry for unpacking and rexecute
342 // if we simply returned the we'd deopt as if any call we patched had just
343 // returned.
344
345 restore_live_registers(sasm);
346
347 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
348 __ jump_to(dest, O0);
349 __ delayed()->restore();
350
351 __ bind(no_deopt);
352 restore_live_registers(sasm);
353 __ ret();
354 __ delayed()->restore();
355
356 return oop_maps;
357 }
358
359 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
360
361 OopMapSet* oop_maps = NULL;
362 // for better readability
363 const bool must_gc_arguments = true;
364 const bool dont_gc_arguments = false;
365
366 // stub code & info for the different stubs
367 switch (id) {
368 case forward_exception_id:
369 {
370 oop_maps = generate_handle_exception(id, sasm);
371 }
372 break;
373
374 case new_instance_id:
375 case fast_new_instance_id:
376 case fast_new_instance_init_check_id:
377 {
378 Register G5_klass = G5; // Incoming
379 Register O0_obj = O0; // Outgoing
380
381 if (id == new_instance_id) {
382 __ set_info("new_instance", dont_gc_arguments);
383 } else if (id == fast_new_instance_id) {
384 __ set_info("fast new_instance", dont_gc_arguments);
385 } else {
386 assert(id == fast_new_instance_init_check_id, "bad StubID");
387 __ set_info("fast new_instance init check", dont_gc_arguments);
388 }
389
390 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
391 UseTLAB && FastTLABRefill) {
392 Label slow_path;
393 Register G1_obj_size = G1;
394 Register G3_t1 = G3;
395 Register G4_t2 = G4;
396 assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2);
397
398 // Push a frame since we may do dtrace notification for the
399 // allocation which requires calling out and we don't want
400 // to stomp the real return address.
401 __ save_frame(0);
402
403 if (id == fast_new_instance_init_check_id) {
404 // make sure the klass is initialized
405 __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1);
406 __ cmp(G3_t1, InstanceKlass::fully_initialized);
407 __ br(Assembler::notEqual, false, Assembler::pn, slow_path);
408 __ delayed()->nop();
409 }
410 #ifdef ASSERT
411 // assert object can be fast path allocated
412 {
413 Label ok, not_ok;
414 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
415 // make sure it's an instance (LH > 0)
416 __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok);
417 __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size);
418 __ br(Assembler::zero, false, Assembler::pn, ok);
419 __ delayed()->nop();
420 __ bind(not_ok);
421 __ stop("assert(can be fast path allocated)");
422 __ should_not_reach_here();
423 __ bind(ok);
424 }
425 #endif // ASSERT
426 // if we got here then the TLAB allocation failed, so try
427 // refilling the TLAB or allocating directly from eden.
428 Label retry_tlab, try_eden;
429 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G5_klass
430
431 __ bind(retry_tlab);
432
433 // get the instance size
434 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
435
436 __ tlab_allocate(O0_obj, G1_obj_size, 0, G3_t1, slow_path);
437
438 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2, /* is_tlab_allocated */ true);
439 __ verify_oop(O0_obj);
440 __ mov(O0, I0);
441 __ ret();
442 __ delayed()->restore();
443
444 __ bind(try_eden);
445 // get the instance size
446 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
447 __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path);
448 __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2);
449
450 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2, /* is_tlab_allocated */ false);
451 __ verify_oop(O0_obj);
452 __ mov(O0, I0);
453 __ ret();
454 __ delayed()->restore();
455
456 __ bind(slow_path);
457
458 // pop this frame so generate_stub_call can push it's own
459 __ restore();
460 }
461
462 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass);
463 // I0->O0: new instance
464 }
465
466 break;
467
468 case counter_overflow_id:
469 // G4 contains bci, G5 contains method
470 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5);
471 break;
472
473 case new_type_array_id:
474 case new_object_array_id:
475 {
476 Register G5_klass = G5; // Incoming
477 Register G4_length = G4; // Incoming
478 Register O0_obj = O0; // Outgoing
479
480 Address klass_lh(G5_klass, Klass::layout_helper_offset());
481 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
482 assert(Klass::_lh_header_size_mask == 0xFF, "bytewise");
483 // Use this offset to pick out an individual byte of the layout_helper:
484 const int klass_lh_header_size_offset = ((BytesPerInt - 1) // 3 - 2 selects byte {0,1,0,0}
485 - Klass::_lh_header_size_shift / BitsPerByte);
486
487 if (id == new_type_array_id) {
488 __ set_info("new_type_array", dont_gc_arguments);
489 } else {
490 __ set_info("new_object_array", dont_gc_arguments);
491 }
492
493 #ifdef ASSERT
494 // assert object type is really an array of the proper kind
495 {
496 Label ok;
497 Register G3_t1 = G3;
498 __ ld(klass_lh, G3_t1);
499 __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1);
500 int tag = ((id == new_type_array_id)
501 ? Klass::_lh_array_tag_type_value
502 : Klass::_lh_array_tag_obj_value);
503 __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok);
504 __ stop("assert(is an array klass)");
505 __ should_not_reach_here();
506 __ bind(ok);
507 }
508 #endif // ASSERT
509
510 if (UseTLAB && FastTLABRefill) {
511 Label slow_path;
512 Register G1_arr_size = G1;
513 Register G3_t1 = G3;
514 Register O1_t2 = O1;
515 assert_different_registers(G5_klass, G4_length, G1_arr_size, G3_t1, O1_t2);
516
517 // check that array length is small enough for fast path
518 __ set(C1_MacroAssembler::max_array_allocation_length, G3_t1);
519 __ cmp(G4_length, G3_t1);
520 __ br(Assembler::greaterUnsigned, false, Assembler::pn, slow_path);
521 __ delayed()->nop();
522
523 // if we got here then the TLAB allocation failed, so try
524 // refilling the TLAB or allocating directly from eden.
525 Label retry_tlab, try_eden;
526 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G4_length and G5_klass
527
528 __ bind(retry_tlab);
529
530 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size
531 __ ld(klass_lh, G3_t1);
532 __ sll(G4_length, G3_t1, G1_arr_size);
533 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1);
534 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1);
535 __ add(G1_arr_size, G3_t1, G1_arr_size);
536 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size); // align up
537 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size);
538
539 __ tlab_allocate(O0_obj, G1_arr_size, 0, G3_t1, slow_path); // preserves G1_arr_size
540
541 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2);
542 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset);
543 __ sub(G1_arr_size, G3_t1, O1_t2); // body length
544 __ add(O0_obj, G3_t1, G3_t1); // body start
545 if (!ZeroTLAB) {
546 __ initialize_body(G3_t1, O1_t2);
547 }
548 __ verify_oop(O0_obj);
549 __ retl();
550 __ delayed()->nop();
551
552 __ bind(try_eden);
553 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size
554 __ ld(klass_lh, G3_t1);
555 __ sll(G4_length, G3_t1, G1_arr_size);
556 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1);
557 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1);
558 __ add(G1_arr_size, G3_t1, G1_arr_size);
559 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size);
560 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size);
561
562 __ eden_allocate(O0_obj, G1_arr_size, 0, G3_t1, O1_t2, slow_path); // preserves G1_arr_size
563 __ incr_allocated_bytes(G1_arr_size, G3_t1, O1_t2);
564
565 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2);
566 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset);
567 __ sub(G1_arr_size, G3_t1, O1_t2); // body length
568 __ add(O0_obj, G3_t1, G3_t1); // body start
569 __ initialize_body(G3_t1, O1_t2);
570 __ verify_oop(O0_obj);
571 __ retl();
572 __ delayed()->nop();
573
574 __ bind(slow_path);
575 }
576
577 if (id == new_type_array_id) {
578 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length);
579 } else {
580 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length);
581 }
582 // I0 -> O0: new array
583 }
584 break;
585
586 case new_multi_array_id:
587 { // O0: klass
588 // O1: rank
589 // O2: address of 1st dimension
590 __ set_info("new_multi_array", dont_gc_arguments);
591 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2);
592 // I0 -> O0: new multi array
593 }
594 break;
595
596 case register_finalizer_id:
597 {
598 __ set_info("register_finalizer", dont_gc_arguments);
599
600 // load the klass and check the has finalizer flag
601 Label register_finalizer;
602 Register t = O1;
603 __ load_klass(O0, t);
604 __ ld(t, in_bytes(Klass::access_flags_offset()), t);
605 __ set(JVM_ACC_HAS_FINALIZER, G3);
606 __ andcc(G3, t, G0);
607 __ br(Assembler::notZero, false, Assembler::pt, register_finalizer);
608 __ delayed()->nop();
609
610 // do a leaf return
611 __ retl();
612 __ delayed()->nop();
613
614 __ bind(register_finalizer);
615 OopMap* oop_map = save_live_registers(sasm);
616 int call_offset = __ call_RT(noreg, noreg,
617 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0);
618 oop_maps = new OopMapSet();
619 oop_maps->add_gc_map(call_offset, oop_map);
620
621 // Now restore all the live registers
622 restore_live_registers(sasm);
623
624 __ ret();
625 __ delayed()->restore();
626 }
627 break;
628
629 case throw_range_check_failed_id:
630 { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded
631 // G4: index
632 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
633 }
634 break;
635
636 case throw_index_exception_id:
637 { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded
638 // G4: index
639 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
640 }
641 break;
642
643 case throw_div0_exception_id:
644 { __ set_info("throw_div0_exception", dont_gc_arguments);
645 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
646 }
647 break;
648
649 case throw_null_pointer_exception_id:
650 { __ set_info("throw_null_pointer_exception", dont_gc_arguments);
651 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
652 }
653 break;
654
655 case handle_exception_id:
656 { __ set_info("handle_exception", dont_gc_arguments);
657 oop_maps = generate_handle_exception(id, sasm);
658 }
659 break;
660
661 case handle_exception_from_callee_id:
662 { __ set_info("handle_exception_from_callee", dont_gc_arguments);
663 oop_maps = generate_handle_exception(id, sasm);
664 }
665 break;
666
667 case unwind_exception_id:
668 {
669 // O0: exception
670 // I7: address of call to this method
671
672 __ set_info("unwind_exception", dont_gc_arguments);
673 __ mov(Oexception, Oexception->after_save());
674 __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());
675
676 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
677 G2_thread, Oissuing_pc->after_save());
678 __ verify_not_null_oop(Oexception->after_save());
679
680 // Restore SP from L7 if the exception PC is a method handle call site.
681 __ mov(O0, G5); // Save the target address.
682 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
683 __ tst(L0); // Condition codes are preserved over the restore.
684 __ restore();
685
686 __ jmp(G5, 0);
687 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
688 }
689 break;
690
691 case throw_array_store_exception_id:
692 {
693 __ set_info("throw_array_store_exception", dont_gc_arguments);
694 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
695 }
696 break;
697
698 case throw_class_cast_exception_id:
699 {
700 // G4: object
701 __ set_info("throw_class_cast_exception", dont_gc_arguments);
702 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
703 }
704 break;
705
706 case throw_incompatible_class_change_error_id:
707 {
708 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
709 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
710 }
711 break;
712
713 case slow_subtype_check_id:
714 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
715 // Arguments :
716 //
717 // ret : G3
718 // sub : G3, argument, destroyed
719 // super: G1, argument, not changed
720 // raddr: O7, blown by call
721 Label miss;
722
723 __ save_frame(0); // Blow no registers!
724
725 __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss);
726
727 __ mov(1, G3);
728 __ ret(); // Result in G5 is 'true'
729 __ delayed()->restore(); // free copy or add can go here
730
731 __ bind(miss);
732 __ mov(0, G3);
733 __ ret(); // Result in G5 is 'false'
734 __ delayed()->restore(); // free copy or add can go here
735 }
736
737 case monitorenter_nofpu_id:
738 case monitorenter_id:
739 { // G4: object
740 // G5: lock address
741 __ set_info("monitorenter", dont_gc_arguments);
742
743 int save_fpu_registers = (id == monitorenter_id);
744 // make a frame and preserve the caller's caller-save registers
745 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
746
747 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5);
748
749 oop_maps = new OopMapSet();
750 oop_maps->add_gc_map(call_offset, oop_map);
751 restore_live_registers(sasm, save_fpu_registers);
752
753 __ ret();
754 __ delayed()->restore();
755 }
756 break;
757
758 case monitorexit_nofpu_id:
759 case monitorexit_id:
760 { // G4: lock address
761 // note: really a leaf routine but must setup last java sp
762 // => use call_RT for now (speed can be improved by
763 // doing last java sp setup manually)
764 __ set_info("monitorexit", dont_gc_arguments);
765
766 int save_fpu_registers = (id == monitorexit_id);
767 // make a frame and preserve the caller's caller-save registers
768 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
769
770 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4);
771
772 oop_maps = new OopMapSet();
773 oop_maps->add_gc_map(call_offset, oop_map);
774 restore_live_registers(sasm, save_fpu_registers);
775
776 __ ret();
777 __ delayed()->restore();
778 }
779 break;
780
781 case deoptimize_id:
782 {
783 __ set_info("deoptimize", dont_gc_arguments);
784 OopMap* oop_map = save_live_registers(sasm);
785 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), G4);
786 oop_maps = new OopMapSet();
787 oop_maps->add_gc_map(call_offset, oop_map);
788 restore_live_registers(sasm);
789 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
790 assert(deopt_blob != NULL, "deoptimization blob must have been created");
791 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
792 __ jump_to(dest, O0);
793 __ delayed()->restore();
794 }
795 break;
796
797 case access_field_patching_id:
798 { __ set_info("access_field_patching", dont_gc_arguments);
799 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
800 }
801 break;
802
803 case load_klass_patching_id:
804 { __ set_info("load_klass_patching", dont_gc_arguments);
805 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
806 }
807 break;
808
809 case load_mirror_patching_id:
810 { __ set_info("load_mirror_patching", dont_gc_arguments);
811 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
812 }
813 break;
814
815 case load_appendix_patching_id:
816 { __ set_info("load_appendix_patching", dont_gc_arguments);
817 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
818 }
819 break;
820
821 case dtrace_object_alloc_id:
822 { // O0: object
823 __ set_info("dtrace_object_alloc", dont_gc_arguments);
824 // we can't gc here so skip the oopmap but make sure that all
825 // the live registers get saved.
826 save_live_registers(sasm);
827
828 __ save_thread(L7_thread_cache);
829 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
830 relocInfo::runtime_call_type);
831 __ delayed()->mov(I0, O0);
832 __ restore_thread(L7_thread_cache);
833
834 restore_live_registers(sasm);
835 __ ret();
836 __ delayed()->restore();
837 }
838 break;
839
840 #if INCLUDE_ALL_GCS
841 case g1_pre_barrier_slow_id:
842 { // G4: previous value of memory
843 BarrierSet* bs = Universe::heap()->barrier_set();
844 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
845 __ save_frame(0);
846 __ set((int)id, O1);
847 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
848 __ should_not_reach_here();
849 break;
850 }
851
852 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
853
854 Register pre_val = G4;
855 Register tmp = G1_scratch;
856 Register tmp2 = G3_scratch;
857
858 Label refill, restart;
859 bool with_frame = false; // I don't know if we can do with-frame.
860 int satb_q_index_byte_offset =
861 in_bytes(JavaThread::satb_mark_queue_offset() +
862 SATBMarkQueue::byte_offset_of_index());
863 int satb_q_buf_byte_offset =
864 in_bytes(JavaThread::satb_mark_queue_offset() +
865 SATBMarkQueue::byte_offset_of_buf());
866
867 __ bind(restart);
868 // Load the index into the SATB buffer. SATBMarkQueue::_index is a
869 // size_t so ld_ptr is appropriate
870 __ ld_ptr(G2_thread, satb_q_index_byte_offset, tmp);
871
872 // index == 0?
873 __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pn, refill);
874
875 __ ld_ptr(G2_thread, satb_q_buf_byte_offset, tmp2);
876 __ sub(tmp, oopSize, tmp);
877
878 __ st_ptr(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
879 // Use return-from-leaf
880 __ retl();
881 __ delayed()->st_ptr(tmp, G2_thread, satb_q_index_byte_offset);
882
883 __ bind(refill);
884
885 save_live_registers(sasm);
886
887 __ call_VM_leaf(L7_thread_cache,
888 CAST_FROM_FN_PTR(address,
889 SATBMarkQueueSet::handle_zero_index_for_thread),
890 G2_thread);
891
892 restore_live_registers(sasm);
893
894 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
895 __ delayed()->restore();
896 }
897 break;
898
899 case g1_post_barrier_slow_id:
900 {
901 BarrierSet* bs = Universe::heap()->barrier_set();
902 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
903 __ save_frame(0);
904 __ set((int)id, O1);
905 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
906 __ should_not_reach_here();
907 break;
908 }
909
910 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
911
912 Register addr = G4;
913 Register cardtable = G5;
914 Register tmp = G1_scratch;
915 Register tmp2 = G3_scratch;
916 jbyte* byte_map_base = barrier_set_cast<CardTableModRefBS>(bs)->byte_map_base;
917
918 Label not_already_dirty, restart, refill, young_card;
919
920 #ifdef _LP64
921 __ srlx(addr, CardTableModRefBS::card_shift, addr);
922 #else
923 __ srl(addr, CardTableModRefBS::card_shift, addr);
924 #endif
925
926 AddressLiteral rs(byte_map_base);
927 __ set(rs, cardtable); // cardtable := <card table base>
928 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
929
930 __ cmp_and_br_short(tmp, G1SATBCardTableModRefBS::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card);
931
932 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
933 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
934
935 assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code");
936 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty);
937
938 __ bind(young_card);
939 // We didn't take the branch, so we're already dirty: return.
940 // Use return-from-leaf
941 __ retl();
942 __ delayed()->nop();
943
944 // Not dirty.
945 __ bind(not_already_dirty);
946
947 // Get cardtable + tmp into a reg by itself
948 __ add(addr, cardtable, tmp2);
949
950 // First, dirty it.
951 __ stb(G0, tmp2, 0); // [cardPtr] := 0 (i.e., dirty).
952
953 Register tmp3 = cardtable;
954 Register tmp4 = tmp;
955
956 // these registers are now dead
957 addr = cardtable = tmp = noreg;
958
959 int dirty_card_q_index_byte_offset =
960 in_bytes(JavaThread::dirty_card_queue_offset() +
961 DirtyCardQueue::byte_offset_of_index());
962 int dirty_card_q_buf_byte_offset =
963 in_bytes(JavaThread::dirty_card_queue_offset() +
964 DirtyCardQueue::byte_offset_of_buf());
965
966 __ bind(restart);
967
968 // Get the index into the update buffer. DirtyCardQueue::_index is
969 // a size_t so ld_ptr is appropriate here.
970 __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, tmp3);
971
972 // index == 0?
973 __ cmp_and_brx_short(tmp3, G0, Assembler::equal, Assembler::pn, refill);
974
975 __ ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, tmp4);
976 __ sub(tmp3, oopSize, tmp3);
977
978 __ st_ptr(tmp2, tmp4, tmp3); // [_buf + index] := <address_of_card>
979 // Use return-from-leaf
980 __ retl();
981 __ delayed()->st_ptr(tmp3, G2_thread, dirty_card_q_index_byte_offset);
982
983 __ bind(refill);
984
985 save_live_registers(sasm);
986
987 __ call_VM_leaf(L7_thread_cache,
988 CAST_FROM_FN_PTR(address,
989 DirtyCardQueueSet::handle_zero_index_for_thread),
990 G2_thread);
991
992 restore_live_registers(sasm);
993
994 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
995 __ delayed()->restore();
996 }
997 break;
998 #endif // INCLUDE_ALL_GCS
999
1000 case predicate_failed_trap_id:
1001 {
1002 __ set_info("predicate_failed_trap", dont_gc_arguments);
1003 OopMap* oop_map = save_live_registers(sasm);
1004
1005 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1006
1007 oop_maps = new OopMapSet();
1008 oop_maps->add_gc_map(call_offset, oop_map);
1009
1010 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1011 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1012 restore_live_registers(sasm);
1013
1014 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
1015 __ jump_to(dest, O0);
1016 __ delayed()->restore();
1017 }
1018 break;
1019
1020 default:
1021 { __ set_info("unimplemented entry", dont_gc_arguments);
1022 __ save_frame(0);
1023 __ set((int)id, O1);
1024 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1);
1025 __ should_not_reach_here();
1026 }
1027 break;
1028 }
1029 return oop_maps;
1030 }
1031
1032
1033 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
1034 __ block_comment("generate_handle_exception");
1035
1036 // Save registers, if required.
1037 OopMapSet* oop_maps = new OopMapSet();
1038 OopMap* oop_map = NULL;
1039 switch (id) {
1040 case forward_exception_id:
1041 // We're handling an exception in the context of a compiled frame.
1042 // The registers have been saved in the standard places. Perform
1043 // an exception lookup in the caller and dispatch to the handler
1044 // if found. Otherwise unwind and dispatch to the callers
1045 // exception handler.
1046 oop_map = generate_oop_map(sasm, true);
1047
1048 // transfer the pending exception to the exception_oop
1049 __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception);
1050 __ ld_ptr(Oexception, 0, G0);
1051 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset()));
1052 __ add(I7, frame::pc_return_offset, Oissuing_pc);
1053 break;
1054 case handle_exception_id:
1055 // At this point all registers MAY be live.
1056 oop_map = save_live_registers(sasm);
1057 __ mov(Oexception->after_save(), Oexception);
1058 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
1059 break;
1060 case handle_exception_from_callee_id:
1061 // At this point all registers except exception oop (Oexception)
1062 // and exception pc (Oissuing_pc) are dead.
1063 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
1064 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
1065 __ save_frame_c1(frame_size_in_bytes);
1066 __ mov(Oexception->after_save(), Oexception);
1067 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
1068 break;
1069 default: ShouldNotReachHere();
1070 }
1071
1072 __ verify_not_null_oop(Oexception);
1073
1074 #ifdef ASSERT
1075 // check that fields in JavaThread for exception oop and issuing pc are
1076 // empty before writing to them
1077 Label oop_empty;
1078 Register scratch = I7; // We can use I7 here because it's overwritten later anyway.
1079 __ ld_ptr(Address(G2_thread, JavaThread::exception_oop_offset()), scratch);
1080 __ br_null(scratch, false, Assembler::pt, oop_empty);
1081 __ delayed()->nop();
1082 __ stop("exception oop already set");
1083 __ bind(oop_empty);
1084
1085 Label pc_empty;
1086 __ ld_ptr(Address(G2_thread, JavaThread::exception_pc_offset()), scratch);
1087 __ br_null(scratch, false, Assembler::pt, pc_empty);
1088 __ delayed()->nop();
1089 __ stop("exception pc already set");
1090 __ bind(pc_empty);
1091 #endif
1092
1093 // save the exception and issuing pc in the thread
1094 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset()));
1095 __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
1096
1097 // use the throwing pc as the return address to lookup (has bci & oop map)
1098 __ mov(Oissuing_pc, I7);
1099 __ sub(I7, frame::pc_return_offset, I7);
1100 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
1101 oop_maps->add_gc_map(call_offset, oop_map);
1102
1103 // Note: if nmethod has been deoptimized then regardless of
1104 // whether it had a handler or not we will deoptimize
1105 // by entering the deopt blob with a pending exception.
1106
1107 // Restore the registers that were saved at the beginning, remove
1108 // the frame and jump to the exception handler.
1109 switch (id) {
1110 case forward_exception_id:
1111 case handle_exception_id:
1112 restore_live_registers(sasm);
1113 __ jmp(O0, 0);
1114 __ delayed()->restore();
1115 break;
1116 case handle_exception_from_callee_id:
1117 // Restore SP from L7 if the exception PC is a method handle call site.
1118 __ mov(O0, G5); // Save the target address.
1119 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
1120 __ tst(L0); // Condition codes are preserved over the restore.
1121 __ restore();
1122
1123 __ jmp(G5, 0); // jump to the exception handler
1124 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
1125 break;
1126 default: ShouldNotReachHere();
1127 }
1128
1129 return oop_maps;
1130 }
1131
1132
1133 #undef __
1134
1135 const char *Runtime1::pd_name_for_address(address entry) {
1136 return "<unknown function>";
1137 }