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 "asm/macroAssembler.inline.hpp"
27 #include "c1/c1_Defs.hpp"
28 #include "c1/c1_MacroAssembler.hpp"
29 #include "c1/c1_Runtime1.hpp"
30 #include "ci/ciUtilities.hpp"
31 #include "gc/shared/cardTable.hpp"
32 #include "gc/shared/cardTableBarrierSet.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/universe.hpp"
35 #include "nativeInst_sparc.hpp"
36 #include "oops/compiledICHolder.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "runtime/sharedRuntime.hpp"
40 #include "runtime/signature.hpp"
41 #include "runtime/vframeArray.hpp"
42 #include "utilities/macros.hpp"
43 #include "utilities/align.hpp"
44 #include "vmreg_sparc.inline.hpp"
45
46 // Implementation of StubAssembler
47
48 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) {
49 // for sparc changing the number of arguments doesn't change
50 // anything about the frame size so we'll always lie and claim that
51 // we are only passing 1 argument.
52 set_num_rt_args(1);
53
54 assert_not_delayed();
55 // bang stack before going to runtime
56 set(-os::vm_page_size() + STACK_BIAS, G3_scratch);
57 st(G0, SP, G3_scratch);
58
59 // debugging support
60 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
61
62 set_last_Java_frame(SP, noreg);
63 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early
64 save_thread(L7_thread_cache);
65 // do the call
66 call(entry_point, relocInfo::runtime_call_type);
67 if (!VerifyThread) {
68 delayed()->mov(G2_thread, O0); // pass thread as first argument
69 } else {
70 delayed()->nop(); // (thread already passed)
71 }
72 int call_offset = offset(); // offset of return address
73 restore_thread(L7_thread_cache);
74 reset_last_Java_frame();
75
76 // check for pending exceptions
77 { Label L;
78 Address exception_addr(G2_thread, Thread::pending_exception_offset());
79 ld_ptr(exception_addr, Gtemp);
80 br_null_short(Gtemp, pt, L);
81 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
82 st_ptr(G0, vm_result_addr);
83 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
84 st_ptr(G0, vm_result_addr_2);
85
86 if (frame_size() == no_frame_size) {
87 // we use O7 linkage so that forward_exception_entry has the issuing PC
88 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
89 delayed()->restore();
90 } else if (_stub_id == Runtime1::forward_exception_id) {
91 should_not_reach_here();
92 } else {
93 AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id));
94 jump_to(exc, G4);
95 delayed()->nop();
96 }
97 bind(L);
98 }
99
100 // get oop result if there is one and reset the value in the thread
101 if (oop_result1->is_valid()) { // get oop result if there is one and reset it in the thread
102 get_vm_result (oop_result1);
103 } else {
104 // be a little paranoid and clear the result
105 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
106 st_ptr(G0, vm_result_addr);
107 }
108
109 // get second result if there is one and reset the value in the thread
110 if (metadata_result->is_valid()) {
111 get_vm_result_2 (metadata_result);
112 } else {
113 // be a little paranoid and clear the result
114 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
115 st_ptr(G0, vm_result_addr_2);
116 }
117
118 return call_offset;
119 }
120
121
122 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
123 // O0 is reserved for the thread
124 mov(arg1, O1);
125 return call_RT(oop_result1, metadata_result, entry, 1);
126 }
127
128
129 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
130 // O0 is reserved for the thread
131 mov(arg1, O1);
132 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
133 return call_RT(oop_result1, metadata_result, entry, 2);
134 }
135
136
137 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
138 // O0 is reserved for the thread
139 mov(arg1, O1);
140 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
141 mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument");
142 return call_RT(oop_result1, metadata_result, entry, 3);
143 }
144
145 void StubAssembler::prologue(const char* name, bool must_gc_arguments) {
146 set_info(name, must_gc_arguments);
147 }
148
149 void StubAssembler::epilogue() {
150 delayed()->restore();
151 }
152
153 // Implementation of Runtime1
154
155
156 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
157 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
158 static int reg_save_size_in_words;
159 static int frame_size_in_bytes = -1;
160
161 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
162 assert(frame_size_in_bytes == sasm->total_frame_size_in_bytes(reg_save_size_in_words),
163 "mismatch in calculation");
164 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
165 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
166 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
167
168 int i;
169 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
170 Register r = as_Register(i);
171 if (r == G1 || r == G3 || r == G4 || r == G5) {
172 int sp_offset = cpu_reg_save_offsets[i];
173 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
174 r->as_VMReg());
175 }
176 }
177
178 if (save_fpu_registers) {
179 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
180 FloatRegister r = as_FloatRegister(i);
181 int sp_offset = fpu_reg_save_offsets[i];
182 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
183 r->as_VMReg());
184 }
185 }
186 return oop_map;
187 }
188
189 #define __ this->
190
191 void C1_MacroAssembler::save_live_registers_no_oop_map(bool save_fpu_registers) {
192 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
193 "mismatch in calculation");
194 __ save_frame_c1(frame_size_in_bytes);
195
196 // Record volatile registers as callee-save values in an OopMap so their save locations will be
197 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for
198 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers
199 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame
200 // (as the stub's I's) when the runtime routine called by the stub creates its frame.
201 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint))
202
203 int i;
204 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
205 Register r = as_Register(i);
206 if (r == G1 || r == G3 || r == G4 || r == G5) {
207 int sp_offset = cpu_reg_save_offsets[i];
208 __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
209 }
210 }
211
212 if (save_fpu_registers) {
213 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
214 FloatRegister r = as_FloatRegister(i);
215 int sp_offset = fpu_reg_save_offsets[i];
216 __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
217 }
218 }
219 }
220
221 void C1_MacroAssembler::restore_live_registers(bool restore_fpu_registers) {
222 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
223 Register r = as_Register(i);
224 if (r == G1 || r == G3 || r == G4 || r == G5) {
225 __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
226 }
227 }
228
229 if (restore_fpu_registers) {
230 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
231 FloatRegister r = as_FloatRegister(i);
232 __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
233 }
234 }
235 }
236
237 #undef __
238 #define __ sasm->
239
240 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) {
241 __ save_live_registers_no_oop_map(save_fpu_registers);
242 return generate_oop_map(sasm, save_fpu_registers);
243 }
244
245 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
246 __ restore_live_registers(restore_fpu_registers);
247 }
248
249
250 void Runtime1::initialize_pd() {
251 // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines
252 //
253 // A stub routine will have a frame that is at least large enough to hold
254 // a register window save area (obviously) and the volatile g registers
255 // and floating registers. A user of save_live_registers can have a frame
256 // that has more scratch area in it (although typically they will use L-regs).
257 // in that case the frame will look like this (stack growing down)
258 //
259 // FP -> | |
260 // | scratch mem |
261 // | " " |
262 // --------------
263 // | float regs |
264 // | " " |
265 // ---------------
266 // | G regs |
267 // | " " |
268 // ---------------
269 // | abi reg. |
270 // | window save |
271 // | area |
272 // SP -> ---------------
273 //
274 int i;
275 int sp_offset = align_up((int)frame::register_save_words, 2); // start doubleword aligned
276
277 // only G int registers are saved explicitly; others are found in register windows
278 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
279 Register r = as_Register(i);
280 if (r == G1 || r == G3 || r == G4 || r == G5) {
281 cpu_reg_save_offsets[i] = sp_offset;
282 sp_offset++;
283 }
284 }
285
286 // all float registers are saved explicitly
287 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
288 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
289 fpu_reg_save_offsets[i] = sp_offset;
290 sp_offset++;
291 }
292 reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset;
293 // this should match assembler::total_frame_size_in_bytes, which
294 // isn't callable from this context. It's checked by an assert when
295 // it's used though.
296 frame_size_in_bytes = align_up(sp_offset * wordSize, 8);
297 }
298
299
300 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
301 // make a frame and preserve the caller's caller-save registers
302 OopMap* oop_map = save_live_registers(sasm);
303 int call_offset;
304 if (!has_argument) {
305 call_offset = __ call_RT(noreg, noreg, target);
306 } else {
307 call_offset = __ call_RT(noreg, noreg, target, G4, G5);
308 }
309 OopMapSet* oop_maps = new OopMapSet();
310 oop_maps->add_gc_map(call_offset, oop_map);
311
312 __ should_not_reach_here();
313 return oop_maps;
314 }
315
316
317 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
318 Register arg1, Register arg2, Register arg3) {
319 // make a frame and preserve the caller's caller-save registers
320 OopMap* oop_map = save_live_registers(sasm);
321
322 int call_offset;
323 if (arg1 == noreg) {
324 call_offset = __ call_RT(result, noreg, target);
325 } else if (arg2 == noreg) {
326 call_offset = __ call_RT(result, noreg, target, arg1);
327 } else if (arg3 == noreg) {
328 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
329 } else {
330 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
331 }
332 OopMapSet* oop_maps = NULL;
333
334 oop_maps = new OopMapSet();
335 oop_maps->add_gc_map(call_offset, oop_map);
336 restore_live_registers(sasm);
337
338 __ ret();
339 __ delayed()->restore();
340
341 return oop_maps;
342 }
343
344
345 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
346 // make a frame and preserve the caller's caller-save registers
347 OopMap* oop_map = save_live_registers(sasm);
348
349 // call the runtime patching routine, returns non-zero if nmethod got deopted.
350 int call_offset = __ call_RT(noreg, noreg, target);
351 OopMapSet* oop_maps = new OopMapSet();
352 oop_maps->add_gc_map(call_offset, oop_map);
353
354 // re-execute the patched instruction or, if the nmethod was deoptmized, return to the
355 // deoptimization handler entry that will cause re-execution of the current bytecode
356 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
357 assert(deopt_blob != NULL, "deoptimization blob must have been created");
358
359 Label no_deopt;
360 __ br_null_short(O0, Assembler::pt, no_deopt);
361
362 // return to the deoptimization handler entry for unpacking and rexecute
363 // if we simply returned the we'd deopt as if any call we patched had just
364 // returned.
365
366 restore_live_registers(sasm);
367
368 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
369 __ jump_to(dest, O0);
370 __ delayed()->restore();
371
372 __ bind(no_deopt);
373 restore_live_registers(sasm);
374 __ ret();
375 __ delayed()->restore();
376
377 return oop_maps;
378 }
379
380 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
381
382 OopMapSet* oop_maps = NULL;
383 // for better readability
384 const bool must_gc_arguments = true;
385 const bool dont_gc_arguments = false;
386
387 // stub code & info for the different stubs
388 switch (id) {
389 case forward_exception_id:
390 {
391 oop_maps = generate_handle_exception(id, sasm);
392 }
393 break;
394
395 case new_instance_id:
396 case fast_new_instance_id:
397 case fast_new_instance_init_check_id:
398 {
399 Register G5_klass = G5; // Incoming
400 Register O0_obj = O0; // Outgoing
401
402 if (id == new_instance_id) {
403 __ set_info("new_instance", dont_gc_arguments);
404 } else if (id == fast_new_instance_id) {
405 __ set_info("fast new_instance", dont_gc_arguments);
406 } else {
407 assert(id == fast_new_instance_init_check_id, "bad StubID");
408 __ set_info("fast new_instance init check", dont_gc_arguments);
409 }
410
411 // If TLAB is disabled, see if there is support for inlining contiguous
412 // allocations.
413 // Otherwise, just go to the slow path.
414 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
415 !UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
416 Label slow_path;
417 Register G1_obj_size = G1;
418 Register G3_t1 = G3;
419 Register G4_t2 = G4;
420 assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2);
421
422 // Push a frame since we may do dtrace notification for the
423 // allocation which requires calling out and we don't want
424 // to stomp the real return address.
425 __ save_frame(0);
426
427 if (id == fast_new_instance_init_check_id) {
428 // make sure the klass is initialized
429 __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1);
430 __ cmp(G3_t1, InstanceKlass::fully_initialized);
431 __ br(Assembler::notEqual, false, Assembler::pn, slow_path);
432 __ delayed()->nop();
433 }
434 #ifdef ASSERT
435 // assert object can be fast path allocated
436 {
437 Label ok, not_ok;
438 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
439 // make sure it's an instance (LH > 0)
440 __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok);
441 __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size);
442 __ br(Assembler::zero, false, Assembler::pn, ok);
443 __ delayed()->nop();
444 __ bind(not_ok);
445 __ stop("assert(can be fast path allocated)");
446 __ should_not_reach_here();
447 __ bind(ok);
448 }
449 #endif // ASSERT
450
451 // If we got here then the TLAB allocation failed, so try allocating directly from eden.
452 // get the instance size
453 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
454 __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path);
455 __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2);
456
457 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2, /* is_tlab_allocated */ false);
458 __ verify_oop(O0_obj);
459 __ mov(O0, I0);
460 __ ret();
461 __ delayed()->restore();
462
463 __ bind(slow_path);
464
465 // pop this frame so generate_stub_call can push it's own
466 __ restore();
467 }
468
469 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass);
470 // I0->O0: new instance
471 }
472
473 break;
474
475 case counter_overflow_id:
476 // G4 contains bci, G5 contains method
477 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5);
478 break;
479
480 case new_type_array_id:
481 case new_object_array_id:
482 {
483 Register G5_klass = G5; // Incoming
484 Register G4_length = G4; // Incoming
485 Register O0_obj = O0; // Outgoing
486
487 Address klass_lh(G5_klass, Klass::layout_helper_offset());
488 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
489 assert(Klass::_lh_header_size_mask == 0xFF, "bytewise");
490 // Use this offset to pick out an individual byte of the layout_helper:
491 const int klass_lh_header_size_offset = ((BytesPerInt - 1) // 3 - 2 selects byte {0,1,0,0}
492 - Klass::_lh_header_size_shift / BitsPerByte);
493
494 if (id == new_type_array_id) {
495 __ set_info("new_type_array", dont_gc_arguments);
496 } else {
497 __ set_info("new_object_array", dont_gc_arguments);
498 }
499
500 #ifdef ASSERT
501 // assert object type is really an array of the proper kind
502 {
503 Label ok;
504 Register G3_t1 = G3;
505 __ ld(klass_lh, G3_t1);
506 __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1);
507 int tag = ((id == new_type_array_id)
508 ? Klass::_lh_array_tag_type_value
509 : Klass::_lh_array_tag_obj_value);
510 __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok);
511 __ stop("assert(is an array klass)");
512 __ should_not_reach_here();
513 __ bind(ok);
514 }
515 #endif // ASSERT
516
517 if (id == new_type_array_id) {
518 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length);
519 } else {
520 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length);
521 }
522 // I0 -> O0: new array
523 }
524 break;
525
526 case new_multi_array_id:
527 { // O0: klass
528 // O1: rank
529 // O2: address of 1st dimension
530 __ set_info("new_multi_array", dont_gc_arguments);
531 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2);
532 // I0 -> O0: new multi array
533 }
534 break;
535
536 case register_finalizer_id:
537 {
538 __ set_info("register_finalizer", dont_gc_arguments);
539
540 // load the klass and check the has finalizer flag
541 Label register_finalizer;
542 Register t = O1;
543 __ load_klass(O0, t);
544 __ ld(t, in_bytes(Klass::access_flags_offset()), t);
545 __ set(JVM_ACC_HAS_FINALIZER, G3);
546 __ andcc(G3, t, G0);
547 __ br(Assembler::notZero, false, Assembler::pt, register_finalizer);
548 __ delayed()->nop();
549
550 // do a leaf return
551 __ retl();
552 __ delayed()->nop();
553
554 __ bind(register_finalizer);
555 OopMap* oop_map = save_live_registers(sasm);
556 int call_offset = __ call_RT(noreg, noreg,
557 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0);
558 oop_maps = new OopMapSet();
559 oop_maps->add_gc_map(call_offset, oop_map);
560
561 // Now restore all the live registers
562 restore_live_registers(sasm);
563
564 __ ret();
565 __ delayed()->restore();
566 }
567 break;
568
569 case throw_range_check_failed_id:
570 { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded
571 // G4: index
572 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
573 }
574 break;
575
576 case throw_index_exception_id:
577 { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded
578 // G4: index
579 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
580 }
581 break;
582
583 case throw_div0_exception_id:
584 { __ set_info("throw_div0_exception", dont_gc_arguments);
585 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
586 }
587 break;
588
589 case throw_null_pointer_exception_id:
590 { __ set_info("throw_null_pointer_exception", dont_gc_arguments);
591 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
592 }
593 break;
594
595 case handle_exception_id:
596 { __ set_info("handle_exception", dont_gc_arguments);
597 oop_maps = generate_handle_exception(id, sasm);
598 }
599 break;
600
601 case handle_exception_from_callee_id:
602 { __ set_info("handle_exception_from_callee", dont_gc_arguments);
603 oop_maps = generate_handle_exception(id, sasm);
604 }
605 break;
606
607 case unwind_exception_id:
608 {
609 // O0: exception
610 // I7: address of call to this method
611
612 __ set_info("unwind_exception", dont_gc_arguments);
613 __ mov(Oexception, Oexception->after_save());
614 __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());
615
616 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
617 G2_thread, Oissuing_pc->after_save());
618 __ verify_not_null_oop(Oexception->after_save());
619
620 // Restore SP from L7 if the exception PC is a method handle call site.
621 __ mov(O0, G5); // Save the target address.
622 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
623 __ tst(L0); // Condition codes are preserved over the restore.
624 __ restore();
625
626 __ jmp(G5, 0);
627 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
628 }
629 break;
630
631 case throw_array_store_exception_id:
632 {
633 __ set_info("throw_array_store_exception", dont_gc_arguments);
634 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
635 }
636 break;
637
638 case throw_class_cast_exception_id:
639 {
640 // G4: object
641 __ set_info("throw_class_cast_exception", dont_gc_arguments);
642 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
643 }
644 break;
645
646 case throw_incompatible_class_change_error_id:
647 {
648 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
649 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
650 }
651 break;
652
653 case slow_subtype_check_id:
654 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
655 // Arguments :
656 //
657 // ret : G3
658 // sub : G3, argument, destroyed
659 // super: G1, argument, not changed
660 // raddr: O7, blown by call
661 Label miss;
662
663 __ save_frame(0); // Blow no registers!
664
665 __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss);
666
667 __ mov(1, G3);
668 __ ret(); // Result in G5 is 'true'
669 __ delayed()->restore(); // free copy or add can go here
670
671 __ bind(miss);
672 __ mov(0, G3);
673 __ ret(); // Result in G5 is 'false'
674 __ delayed()->restore(); // free copy or add can go here
675 }
676
677 case monitorenter_nofpu_id:
678 case monitorenter_id:
679 { // G4: object
680 // G5: lock address
681 __ set_info("monitorenter", dont_gc_arguments);
682
683 int save_fpu_registers = (id == monitorenter_id);
684 // make a frame and preserve the caller's caller-save registers
685 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
686
687 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5);
688
689 oop_maps = new OopMapSet();
690 oop_maps->add_gc_map(call_offset, oop_map);
691 restore_live_registers(sasm, save_fpu_registers);
692
693 __ ret();
694 __ delayed()->restore();
695 }
696 break;
697
698 case monitorexit_nofpu_id:
699 case monitorexit_id:
700 { // G4: lock address
701 // note: really a leaf routine but must setup last java sp
702 // => use call_RT for now (speed can be improved by
703 // doing last java sp setup manually)
704 __ set_info("monitorexit", dont_gc_arguments);
705
706 int save_fpu_registers = (id == monitorexit_id);
707 // make a frame and preserve the caller's caller-save registers
708 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
709
710 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4);
711
712 oop_maps = new OopMapSet();
713 oop_maps->add_gc_map(call_offset, oop_map);
714 restore_live_registers(sasm, save_fpu_registers);
715
716 __ ret();
717 __ delayed()->restore();
718 }
719 break;
720
721 case deoptimize_id:
722 {
723 __ set_info("deoptimize", dont_gc_arguments);
724 OopMap* oop_map = save_live_registers(sasm);
725 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), G4);
726 oop_maps = new OopMapSet();
727 oop_maps->add_gc_map(call_offset, oop_map);
728 restore_live_registers(sasm);
729 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
730 assert(deopt_blob != NULL, "deoptimization blob must have been created");
731 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
732 __ jump_to(dest, O0);
733 __ delayed()->restore();
734 }
735 break;
736
737 case access_field_patching_id:
738 { __ set_info("access_field_patching", dont_gc_arguments);
739 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
740 }
741 break;
742
743 case load_klass_patching_id:
744 { __ set_info("load_klass_patching", dont_gc_arguments);
745 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
746 }
747 break;
748
749 case load_mirror_patching_id:
750 { __ set_info("load_mirror_patching", dont_gc_arguments);
751 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
752 }
753 break;
754
755 case load_appendix_patching_id:
756 { __ set_info("load_appendix_patching", dont_gc_arguments);
757 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
758 }
759 break;
760
761 case dtrace_object_alloc_id:
762 { // O0: object
763 __ set_info("dtrace_object_alloc", dont_gc_arguments);
764 // we can't gc here so skip the oopmap but make sure that all
765 // the live registers get saved.
766 save_live_registers(sasm);
767
768 __ save_thread(L7_thread_cache);
769 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
770 relocInfo::runtime_call_type);
771 __ delayed()->mov(I0, O0);
772 __ restore_thread(L7_thread_cache);
773
774 restore_live_registers(sasm);
775 __ ret();
776 __ delayed()->restore();
777 }
778 break;
779
780 case predicate_failed_trap_id:
781 {
782 __ set_info("predicate_failed_trap", dont_gc_arguments);
783 OopMap* oop_map = save_live_registers(sasm);
784
785 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
786
787 oop_maps = new OopMapSet();
788 oop_maps->add_gc_map(call_offset, oop_map);
789
790 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
791 assert(deopt_blob != NULL, "deoptimization blob must have been created");
792 restore_live_registers(sasm);
793
794 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
795 __ jump_to(dest, O0);
796 __ delayed()->restore();
797 }
798 break;
799
800 default:
801 { __ set_info("unimplemented entry", dont_gc_arguments);
802 __ save_frame(0);
803 __ set((int)id, O1);
804 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1);
805 __ should_not_reach_here();
806 }
807 break;
808 }
809 return oop_maps;
810 }
811
812
813 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
814 __ block_comment("generate_handle_exception");
815
816 // Save registers, if required.
817 OopMapSet* oop_maps = new OopMapSet();
818 OopMap* oop_map = NULL;
819 switch (id) {
820 case forward_exception_id:
821 // We're handling an exception in the context of a compiled frame.
822 // The registers have been saved in the standard places. Perform
823 // an exception lookup in the caller and dispatch to the handler
824 // if found. Otherwise unwind and dispatch to the callers
825 // exception handler.
826 oop_map = generate_oop_map(sasm, true);
827
828 // transfer the pending exception to the exception_oop
829 __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception);
830 __ ld_ptr(Oexception, 0, G0);
831 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset()));
832 __ add(I7, frame::pc_return_offset, Oissuing_pc);
833 break;
834 case handle_exception_id:
835 // At this point all registers MAY be live.
836 oop_map = save_live_registers(sasm);
837 __ mov(Oexception->after_save(), Oexception);
838 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
839 break;
840 case handle_exception_from_callee_id:
841 // At this point all registers except exception oop (Oexception)
842 // and exception pc (Oissuing_pc) are dead.
843 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
844 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
845 __ save_frame_c1(frame_size_in_bytes);
846 __ mov(Oexception->after_save(), Oexception);
847 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
848 break;
849 default: ShouldNotReachHere();
850 }
851
852 __ verify_not_null_oop(Oexception);
853
854 #ifdef ASSERT
855 // check that fields in JavaThread for exception oop and issuing pc are
856 // empty before writing to them
857 Label oop_empty;
858 Register scratch = I7; // We can use I7 here because it's overwritten later anyway.
859 __ ld_ptr(Address(G2_thread, JavaThread::exception_oop_offset()), scratch);
860 __ br_null(scratch, false, Assembler::pt, oop_empty);
861 __ delayed()->nop();
862 __ stop("exception oop already set");
863 __ bind(oop_empty);
864
865 Label pc_empty;
866 __ ld_ptr(Address(G2_thread, JavaThread::exception_pc_offset()), scratch);
867 __ br_null(scratch, false, Assembler::pt, pc_empty);
868 __ delayed()->nop();
869 __ stop("exception pc already set");
870 __ bind(pc_empty);
871 #endif
872
873 // save the exception and issuing pc in the thread
874 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset()));
875 __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
876
877 // use the throwing pc as the return address to lookup (has bci & oop map)
878 __ mov(Oissuing_pc, I7);
879 __ sub(I7, frame::pc_return_offset, I7);
880 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
881 oop_maps->add_gc_map(call_offset, oop_map);
882
883 // Note: if nmethod has been deoptimized then regardless of
884 // whether it had a handler or not we will deoptimize
885 // by entering the deopt blob with a pending exception.
886
887 // Restore the registers that were saved at the beginning, remove
888 // the frame and jump to the exception handler.
889 switch (id) {
890 case forward_exception_id:
891 case handle_exception_id:
892 restore_live_registers(sasm);
893 __ jmp(O0, 0);
894 __ delayed()->restore();
895 break;
896 case handle_exception_from_callee_id:
897 // Restore SP from L7 if the exception PC is a method handle call site.
898 __ mov(O0, G5); // Save the target address.
899 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
900 __ tst(L0); // Condition codes are preserved over the restore.
901 __ restore();
902
903 __ jmp(G5, 0); // jump to the exception handler
904 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
905 break;
906 default: ShouldNotReachHere();
907 }
908
909 return oop_maps;
910 }
911
912
913 #undef __
914
915 const char *Runtime1::pd_name_for_address(address entry) {
916 return "<unknown function>";
917 }