1 /*
2 * Copyright 1999-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_c1_Runtime1_sparc.cpp.incl"
27
28 // Implementation of StubAssembler
29
30 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry_point, int number_of_arguments) {
31 // for sparc changing the number of arguments doesn't change
32 // anything about the frame size so we'll always lie and claim that
33 // we are only passing 1 argument.
34 set_num_rt_args(1);
35
36 assert_not_delayed();
37 // bang stack before going to runtime
38 set(-os::vm_page_size() + STACK_BIAS, G3_scratch);
39 st(G0, SP, G3_scratch);
40
41 // debugging support
42 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
43
44 set_last_Java_frame(SP, noreg);
45 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early
46 save_thread(L7_thread_cache);
47 // do the call
48 call(entry_point, relocInfo::runtime_call_type);
49 if (!VerifyThread) {
50 delayed()->mov(G2_thread, O0); // pass thread as first argument
51 } else {
52 delayed()->nop(); // (thread already passed)
53 }
54 int call_offset = offset(); // offset of return address
55 restore_thread(L7_thread_cache);
56 reset_last_Java_frame();
57
58 // check for pending exceptions
59 { Label L;
60 Address exception_addr(G2_thread, Thread::pending_exception_offset());
61 ld_ptr(exception_addr, Gtemp);
62 br_null(Gtemp, false, pt, L);
63 delayed()->nop();
64 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
65 st_ptr(G0, vm_result_addr);
66 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
67 st_ptr(G0, vm_result_addr_2);
68
69 if (frame_size() == no_frame_size) {
70 // we use O7 linkage so that forward_exception_entry has the issuing PC
71 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
72 delayed()->restore();
73 } else if (_stub_id == Runtime1::forward_exception_id) {
74 should_not_reach_here();
75 } else {
76 AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id));
77 jump_to(exc, G4);
78 delayed()->nop();
79 }
80 bind(L);
81 }
82
83 // get oop result if there is one and reset the value in the thread
84 if (oop_result1->is_valid()) { // get oop result if there is one and reset it in the thread
85 get_vm_result (oop_result1);
86 } else {
87 // be a little paranoid and clear the result
88 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
89 st_ptr(G0, vm_result_addr);
90 }
91
92 if (oop_result2->is_valid()) {
93 get_vm_result_2(oop_result2);
94 } else {
95 // be a little paranoid and clear the result
96 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
97 st_ptr(G0, vm_result_addr_2);
98 }
99
100 return call_offset;
101 }
102
103
104 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1) {
105 // O0 is reserved for the thread
106 mov(arg1, O1);
107 return call_RT(oop_result1, oop_result2, entry, 1);
108 }
109
110
111 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1, Register arg2) {
112 // O0 is reserved for the thread
113 mov(arg1, O1);
114 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
115 return call_RT(oop_result1, oop_result2, entry, 2);
116 }
117
118
119 int StubAssembler::call_RT(Register oop_result1, Register oop_result2, address entry, Register arg1, Register arg2, Register arg3) {
120 // O0 is reserved for the thread
121 mov(arg1, O1);
122 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
123 mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument");
124 return call_RT(oop_result1, oop_result2, entry, 3);
125 }
126
127
128 // Implementation of Runtime1
129
130 #define __ sasm->
131
132 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
133 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
134 static int reg_save_size_in_words;
135 static int frame_size_in_bytes = -1;
136
137 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
138 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
139 " mismatch in calculation");
140 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
141 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
142 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
143
144 int i;
145 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
146 Register r = as_Register(i);
147 if (r == G1 || r == G3 || r == G4 || r == G5) {
148 int sp_offset = cpu_reg_save_offsets[i];
149 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
150 r->as_VMReg());
151 }
152 }
153
154 if (save_fpu_registers) {
155 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
156 FloatRegister r = as_FloatRegister(i);
157 int sp_offset = fpu_reg_save_offsets[i];
158 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
159 r->as_VMReg());
160 }
161 }
162 return oop_map;
163 }
164
165 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) {
166 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
167 " mismatch in calculation");
168 __ save_frame_c1(frame_size_in_bytes);
169 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
170
171 // Record volatile registers as callee-save values in an OopMap so their save locations will be
172 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for
173 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers
174 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame
175 // (as the stub's I's) when the runtime routine called by the stub creates its frame.
176 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint))
177
178 int i;
179 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
180 Register r = as_Register(i);
181 if (r == G1 || r == G3 || r == G4 || r == G5) {
182 int sp_offset = cpu_reg_save_offsets[i];
183 __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
184 }
185 }
186
187 if (save_fpu_registers) {
188 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
189 FloatRegister r = as_FloatRegister(i);
190 int sp_offset = fpu_reg_save_offsets[i];
191 __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
192 }
193 }
194
195 return generate_oop_map(sasm, save_fpu_registers);
196 }
197
198 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
199 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
200 Register r = as_Register(i);
201 if (r == G1 || r == G3 || r == G4 || r == G5) {
202 __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
203 }
204 }
205
206 if (restore_fpu_registers) {
207 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
208 FloatRegister r = as_FloatRegister(i);
209 __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
210 }
211 }
212 }
213
214
215 void Runtime1::initialize_pd() {
216 // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines
217 //
218 // A stub routine will have a frame that is at least large enough to hold
219 // a register window save area (obviously) and the volatile g registers
220 // and floating registers. A user of save_live_registers can have a frame
221 // that has more scratch area in it (although typically they will use L-regs).
222 // in that case the frame will look like this (stack growing down)
223 //
224 // FP -> | |
225 // | scratch mem |
226 // | " " |
227 // --------------
228 // | float regs |
229 // | " " |
230 // ---------------
231 // | G regs |
232 // | " " |
233 // ---------------
234 // | abi reg. |
235 // | window save |
236 // | area |
237 // SP -> ---------------
238 //
239 int i;
240 int sp_offset = round_to(frame::register_save_words, 2); // start doubleword aligned
241
242 // only G int registers are saved explicitly; others are found in register windows
243 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
244 Register r = as_Register(i);
245 if (r == G1 || r == G3 || r == G4 || r == G5) {
246 cpu_reg_save_offsets[i] = sp_offset;
247 sp_offset++;
248 }
249 }
250
251 // all float registers are saved explicitly
252 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
253 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
254 fpu_reg_save_offsets[i] = sp_offset;
255 sp_offset++;
256 }
257 reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset;
258 // this should match assembler::total_frame_size_in_bytes, which
259 // isn't callable from this context. It's checked by an assert when
260 // it's used though.
261 frame_size_in_bytes = align_size_up(sp_offset * wordSize, 8);
262 }
263
264
265 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
266 // make a frame and preserve the caller's caller-save registers
267 OopMap* oop_map = save_live_registers(sasm);
268 int call_offset;
269 if (!has_argument) {
270 call_offset = __ call_RT(noreg, noreg, target);
271 } else {
272 call_offset = __ call_RT(noreg, noreg, target, G4);
273 }
274 OopMapSet* oop_maps = new OopMapSet();
275 oop_maps->add_gc_map(call_offset, oop_map);
276
277 __ should_not_reach_here();
278 return oop_maps;
279 }
280
281
282 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
283 Register arg1, Register arg2, Register arg3) {
284 // make a frame and preserve the caller's caller-save registers
285 OopMap* oop_map = save_live_registers(sasm);
286
287 int call_offset;
288 if (arg1 == noreg) {
289 call_offset = __ call_RT(result, noreg, target);
290 } else if (arg2 == noreg) {
291 call_offset = __ call_RT(result, noreg, target, arg1);
292 } else if (arg3 == noreg) {
293 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
294 } else {
295 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
296 }
297 OopMapSet* oop_maps = NULL;
298
299 oop_maps = new OopMapSet();
300 oop_maps->add_gc_map(call_offset, oop_map);
301 restore_live_registers(sasm);
302
303 __ ret();
304 __ delayed()->restore();
305
306 return oop_maps;
307 }
308
309
310 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
311 // make a frame and preserve the caller's caller-save registers
312 OopMap* oop_map = save_live_registers(sasm);
313
314 // call the runtime patching routine, returns non-zero if nmethod got deopted.
315 int call_offset = __ call_RT(noreg, noreg, target);
316 OopMapSet* oop_maps = new OopMapSet();
317 oop_maps->add_gc_map(call_offset, oop_map);
318
319 // re-execute the patched instruction or, if the nmethod was deoptmized, return to the
320 // deoptimization handler entry that will cause re-execution of the current bytecode
321 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
322 assert(deopt_blob != NULL, "deoptimization blob must have been created");
323
324 Label no_deopt;
325 __ tst(O0);
326 __ brx(Assembler::equal, false, Assembler::pt, no_deopt);
327 __ delayed()->nop();
328
329 // return to the deoptimization handler entry for unpacking and rexecute
330 // if we simply returned the we'd deopt as if any call we patched had just
331 // returned.
332
333 restore_live_registers(sasm);
334 __ restore();
335 __ br(Assembler::always, false, Assembler::pt, deopt_blob->unpack_with_reexecution(), relocInfo::runtime_call_type);
336 __ delayed()->nop();
337
338 __ bind(no_deopt);
339 restore_live_registers(sasm);
340 __ ret();
341 __ delayed()->restore();
342
343 return oop_maps;
344 }
345
346 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
347
348 OopMapSet* oop_maps = NULL;
349 // for better readability
350 const bool must_gc_arguments = true;
351 const bool dont_gc_arguments = false;
352
353 // stub code & info for the different stubs
354 switch (id) {
355 case forward_exception_id:
356 {
357 // we're handling an exception in the context of a compiled
358 // frame. The registers have been saved in the standard
359 // places. Perform an exception lookup in the caller and
360 // dispatch to the handler if found. Otherwise unwind and
361 // dispatch to the callers exception handler.
362
363 oop_maps = new OopMapSet();
364 OopMap* oop_map = generate_oop_map(sasm, true);
365
366 // transfer the pending exception to the exception_oop
367 __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception);
368 __ ld_ptr(Oexception, 0, G0);
369 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset()));
370 __ add(I7, frame::pc_return_offset, Oissuing_pc);
371
372 generate_handle_exception(sasm, oop_maps, oop_map);
373 __ should_not_reach_here();
374 }
375 break;
376
377 case new_instance_id:
378 case fast_new_instance_id:
379 case fast_new_instance_init_check_id:
380 {
381 Register G5_klass = G5; // Incoming
382 Register O0_obj = O0; // Outgoing
383
384 if (id == new_instance_id) {
385 __ set_info("new_instance", dont_gc_arguments);
386 } else if (id == fast_new_instance_id) {
387 __ set_info("fast new_instance", dont_gc_arguments);
388 } else {
389 assert(id == fast_new_instance_init_check_id, "bad StubID");
390 __ set_info("fast new_instance init check", dont_gc_arguments);
391 }
392
393 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
394 UseTLAB && FastTLABRefill) {
395 Label slow_path;
396 Register G1_obj_size = G1;
397 Register G3_t1 = G3;
398 Register G4_t2 = G4;
399 assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2);
400
401 // Push a frame since we may do dtrace notification for the
402 // allocation which requires calling out and we don't want
403 // to stomp the real return address.
404 __ save_frame(0);
405
406 if (id == fast_new_instance_init_check_id) {
407 // make sure the klass is initialized
408 __ ld(G5_klass, instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc), G3_t1);
409 __ cmp(G3_t1, instanceKlass::fully_initialized);
410 __ br(Assembler::notEqual, false, Assembler::pn, slow_path);
411 __ delayed()->nop();
412 }
413 #ifdef ASSERT
414 // assert object can be fast path allocated
415 {
416 Label ok, not_ok;
417 __ ld(G5_klass, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc), G1_obj_size);
418 __ cmp(G1_obj_size, 0); // make sure it's an instance (LH > 0)
419 __ br(Assembler::lessEqual, false, Assembler::pn, not_ok);
420 __ delayed()->nop();
421 __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size);
422 __ br(Assembler::zero, false, Assembler::pn, ok);
423 __ delayed()->nop();
424 __ bind(not_ok);
425 __ stop("assert(can be fast path allocated)");
426 __ should_not_reach_here();
427 __ bind(ok);
428 }
429 #endif // ASSERT
430 // if we got here then the TLAB allocation failed, so try
431 // refilling the TLAB or allocating directly from eden.
432 Label retry_tlab, try_eden;
433 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G5_klass
434
435 __ bind(retry_tlab);
436
437 // get the instance size
438 __ ld(G5_klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes(), G1_obj_size);
439 __ tlab_allocate(O0_obj, G1_obj_size, 0, G3_t1, slow_path);
440 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2);
441 __ verify_oop(O0_obj);
442 __ mov(O0, I0);
443 __ ret();
444 __ delayed()->restore();
445
446 __ bind(try_eden);
447 // get the instance size
448 __ ld(G5_klass, klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes(), G1_obj_size);
449 __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path);
450 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2);
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 #ifdef TIERED
469 case counter_overflow_id:
470 // G4 contains bci
471 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4);
472 break;
473 #endif // TIERED
474
475 case new_type_array_id:
476 case new_object_array_id:
477 {
478 Register G5_klass = G5; // Incoming
479 Register G4_length = G4; // Incoming
480 Register O0_obj = O0; // Outgoing
481
482 Address klass_lh(G5_klass, ((klassOopDesc::header_size() * HeapWordSize)
483 + Klass::layout_helper_offset_in_bytes()));
484 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
485 assert(Klass::_lh_header_size_mask == 0xFF, "bytewise");
486 // Use this offset to pick out an individual byte of the layout_helper:
487 const int klass_lh_header_size_offset = ((BytesPerInt - 1) // 3 - 2 selects byte {0,1,0,0}
488 - Klass::_lh_header_size_shift / BitsPerByte);
489
490 if (id == new_type_array_id) {
491 __ set_info("new_type_array", dont_gc_arguments);
492 } else {
493 __ set_info("new_object_array", dont_gc_arguments);
494 }
495
496 #ifdef ASSERT
497 // assert object type is really an array of the proper kind
498 {
499 Label ok;
500 Register G3_t1 = G3;
501 __ ld(klass_lh, G3_t1);
502 __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1);
503 int tag = ((id == new_type_array_id)
504 ? Klass::_lh_array_tag_type_value
505 : Klass::_lh_array_tag_obj_value);
506 __ cmp(G3_t1, tag);
507 __ brx(Assembler::equal, false, Assembler::pt, ok);
508 __ delayed()->nop();
509 __ stop("assert(is an array klass)");
510 __ should_not_reach_here();
511 __ bind(ok);
512 }
513 #endif // ASSERT
514
515 if (UseTLAB && FastTLABRefill) {
516 Label slow_path;
517 Register G1_arr_size = G1;
518 Register G3_t1 = G3;
519 Register O1_t2 = O1;
520 assert_different_registers(G5_klass, G4_length, G1_arr_size, G3_t1, O1_t2);
521
522 // check that array length is small enough for fast path
523 __ set(C1_MacroAssembler::max_array_allocation_length, G3_t1);
524 __ cmp(G4_length, G3_t1);
525 __ br(Assembler::greaterUnsigned, false, Assembler::pn, slow_path);
526 __ delayed()->nop();
527
528 // if we got here then the TLAB allocation failed, so try
529 // refilling the TLAB or allocating directly from eden.
530 Label retry_tlab, try_eden;
531 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G4_length and G5_klass
532
533 __ bind(retry_tlab);
534
535 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size
536 __ ld(klass_lh, G3_t1);
537 __ sll(G4_length, G3_t1, G1_arr_size);
538 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1);
539 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1);
540 __ add(G1_arr_size, G3_t1, G1_arr_size);
541 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size); // align up
542 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size);
543
544 __ tlab_allocate(O0_obj, G1_arr_size, 0, G3_t1, slow_path); // preserves G1_arr_size
545
546 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2);
547 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset);
548 __ sub(G1_arr_size, G3_t1, O1_t2); // body length
549 __ add(O0_obj, G3_t1, G3_t1); // body start
550 __ initialize_body(G3_t1, O1_t2);
551 __ verify_oop(O0_obj);
552 __ retl();
553 __ delayed()->nop();
554
555 __ bind(try_eden);
556 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size
557 __ ld(klass_lh, G3_t1);
558 __ sll(G4_length, G3_t1, G1_arr_size);
559 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1);
560 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1);
561 __ add(G1_arr_size, G3_t1, G1_arr_size);
562 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size);
563 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size);
564
565 __ eden_allocate(O0_obj, G1_arr_size, 0, G3_t1, O1_t2, slow_path); // preserves G1_arr_size
566
567 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2);
568 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset);
569 __ sub(G1_arr_size, G3_t1, O1_t2); // body length
570 __ add(O0_obj, G3_t1, G3_t1); // body start
571 __ initialize_body(G3_t1, O1_t2);
572 __ verify_oop(O0_obj);
573 __ retl();
574 __ delayed()->nop();
575
576 __ bind(slow_path);
577 }
578
579 if (id == new_type_array_id) {
580 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length);
581 } else {
582 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length);
583 }
584 // I0 -> O0: new array
585 }
586 break;
587
588 case new_multi_array_id:
589 { // O0: klass
590 // O1: rank
591 // O2: address of 1st dimension
592 __ set_info("new_multi_array", dont_gc_arguments);
593 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2);
594 // I0 -> O0: new multi array
595 }
596 break;
597
598 case register_finalizer_id:
599 {
600 __ set_info("register_finalizer", dont_gc_arguments);
601
602 // load the klass and check the has finalizer flag
603 Label register_finalizer;
604 Register t = O1;
605 __ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), t);
606 __ ld(t, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc), t);
607 __ set(JVM_ACC_HAS_FINALIZER, G3);
608 __ andcc(G3, t, G0);
609 __ br(Assembler::notZero, false, Assembler::pt, register_finalizer);
610 __ delayed()->nop();
611
612 // do a leaf return
613 __ retl();
614 __ delayed()->nop();
615
616 __ bind(register_finalizer);
617 OopMap* oop_map = save_live_registers(sasm);
618 int call_offset = __ call_RT(noreg, noreg,
619 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0);
620 oop_maps = new OopMapSet();
621 oop_maps->add_gc_map(call_offset, oop_map);
622
623 // Now restore all the live registers
624 restore_live_registers(sasm);
625
626 __ ret();
627 __ delayed()->restore();
628 }
629 break;
630
631 case throw_range_check_failed_id:
632 { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded
633 // G4: index
634 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
635 }
636 break;
637
638 case throw_index_exception_id:
639 { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded
640 // G4: index
641 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
642 }
643 break;
644
645 case throw_div0_exception_id:
646 { __ set_info("throw_div0_exception", dont_gc_arguments);
647 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
648 }
649 break;
650
651 case throw_null_pointer_exception_id:
652 { __ set_info("throw_null_pointer_exception", dont_gc_arguments);
653 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
654 }
655 break;
656
657 case handle_exception_id:
658 {
659 __ set_info("handle_exception", dont_gc_arguments);
660 // make a frame and preserve the caller's caller-save registers
661
662 oop_maps = new OopMapSet();
663 OopMap* oop_map = save_live_registers(sasm);
664 __ mov(Oexception->after_save(), Oexception);
665 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
666 generate_handle_exception(sasm, oop_maps, oop_map);
667 }
668 break;
669
670 case unwind_exception_id:
671 {
672 // O0: exception
673 // I7: address of call to this method
674
675 __ set_info("unwind_exception", dont_gc_arguments);
676 __ mov(Oexception, Oexception->after_save());
677 __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());
678
679 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
680 G2_thread, Oissuing_pc->after_save());
681 __ verify_not_null_oop(Oexception->after_save());
682
683 // Restore SP from L7 if the exception PC is a MethodHandle call site.
684 __ mov(O0, G5); // Save the target address.
685 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
686 __ tst(L0); // Condition codes are preserved over the restore.
687 __ restore();
688
689 __ jmp(G5, 0);
690 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7, SP); // Restore SP if required.
691 }
692 break;
693
694 case throw_array_store_exception_id:
695 {
696 __ set_info("throw_array_store_exception", dont_gc_arguments);
697 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), false);
698 }
699 break;
700
701 case throw_class_cast_exception_id:
702 {
703 // G4: object
704 __ set_info("throw_class_cast_exception", dont_gc_arguments);
705 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
706 }
707 break;
708
709 case throw_incompatible_class_change_error_id:
710 {
711 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
712 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
713 }
714 break;
715
716 case slow_subtype_check_id:
717 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
718 // Arguments :
719 //
720 // ret : G3
721 // sub : G3, argument, destroyed
722 // super: G1, argument, not changed
723 // raddr: O7, blown by call
724 Label miss;
725
726 __ save_frame(0); // Blow no registers!
727
728 __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss);
729
730 __ mov(1, G3);
731 __ ret(); // Result in G5 is 'true'
732 __ delayed()->restore(); // free copy or add can go here
733
734 __ bind(miss);
735 __ mov(0, G3);
736 __ ret(); // Result in G5 is 'false'
737 __ delayed()->restore(); // free copy or add can go here
738 }
739
740 case monitorenter_nofpu_id:
741 case monitorenter_id:
742 { // G4: object
743 // G5: lock address
744 __ set_info("monitorenter", dont_gc_arguments);
745
746 int save_fpu_registers = (id == monitorenter_id);
747 // make a frame and preserve the caller's caller-save registers
748 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
749
750 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5);
751
752 oop_maps = new OopMapSet();
753 oop_maps->add_gc_map(call_offset, oop_map);
754 restore_live_registers(sasm, save_fpu_registers);
755
756 __ ret();
757 __ delayed()->restore();
758 }
759 break;
760
761 case monitorexit_nofpu_id:
762 case monitorexit_id:
763 { // G4: lock address
764 // note: really a leaf routine but must setup last java sp
765 // => use call_RT for now (speed can be improved by
766 // doing last java sp setup manually)
767 __ set_info("monitorexit", dont_gc_arguments);
768
769 int save_fpu_registers = (id == monitorexit_id);
770 // make a frame and preserve the caller's caller-save registers
771 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
772
773 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4);
774
775 oop_maps = new OopMapSet();
776 oop_maps->add_gc_map(call_offset, oop_map);
777 restore_live_registers(sasm, save_fpu_registers);
778
779 __ ret();
780 __ delayed()->restore();
781
782 }
783 break;
784
785 case access_field_patching_id:
786 { __ set_info("access_field_patching", dont_gc_arguments);
787 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
788 }
789 break;
790
791 case load_klass_patching_id:
792 { __ set_info("load_klass_patching", dont_gc_arguments);
793 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
794 }
795 break;
796
797 case jvmti_exception_throw_id:
798 { // Oexception : exception
799 __ set_info("jvmti_exception_throw", dont_gc_arguments);
800 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, Runtime1::post_jvmti_exception_throw), I0);
801 }
802 break;
803
804 case dtrace_object_alloc_id:
805 { // O0: object
806 __ set_info("dtrace_object_alloc", dont_gc_arguments);
807 // we can't gc here so skip the oopmap but make sure that all
808 // the live registers get saved.
809 save_live_registers(sasm);
810
811 __ save_thread(L7_thread_cache);
812 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
813 relocInfo::runtime_call_type);
814 __ delayed()->mov(I0, O0);
815 __ restore_thread(L7_thread_cache);
816
817 restore_live_registers(sasm);
818 __ ret();
819 __ delayed()->restore();
820 }
821 break;
822
823 #ifndef SERIALGC
824 case g1_pre_barrier_slow_id:
825 { // G4: previous value of memory
826 BarrierSet* bs = Universe::heap()->barrier_set();
827 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
828 __ save_frame(0);
829 __ set((int)id, O1);
830 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
831 __ should_not_reach_here();
832 break;
833 }
834
835 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
836
837 Register pre_val = G4;
838 Register tmp = G1_scratch;
839 Register tmp2 = G3_scratch;
840
841 Label refill, restart;
842 bool with_frame = false; // I don't know if we can do with-frame.
843 int satb_q_index_byte_offset =
844 in_bytes(JavaThread::satb_mark_queue_offset() +
845 PtrQueue::byte_offset_of_index());
846 int satb_q_buf_byte_offset =
847 in_bytes(JavaThread::satb_mark_queue_offset() +
848 PtrQueue::byte_offset_of_buf());
849 __ bind(restart);
850 __ ld_ptr(G2_thread, satb_q_index_byte_offset, tmp);
851
852 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false,
853 Assembler::pn, tmp, refill);
854
855 // If the branch is taken, no harm in executing this in the delay slot.
856 __ delayed()->ld_ptr(G2_thread, satb_q_buf_byte_offset, tmp2);
857 __ sub(tmp, oopSize, tmp);
858
859 __ st_ptr(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
860 // Use return-from-leaf
861 __ retl();
862 __ delayed()->st_ptr(tmp, G2_thread, satb_q_index_byte_offset);
863
864 __ bind(refill);
865 __ save_frame(0);
866
867 __ mov(pre_val, L0);
868 __ mov(tmp, L1);
869 __ mov(tmp2, L2);
870
871 __ call_VM_leaf(L7_thread_cache,
872 CAST_FROM_FN_PTR(address,
873 SATBMarkQueueSet::handle_zero_index_for_thread),
874 G2_thread);
875
876 __ mov(L0, pre_val);
877 __ mov(L1, tmp);
878 __ mov(L2, tmp2);
879
880 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
881 __ delayed()->restore();
882 }
883 break;
884
885 case g1_post_barrier_slow_id:
886 {
887 BarrierSet* bs = Universe::heap()->barrier_set();
888 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
889 __ save_frame(0);
890 __ set((int)id, O1);
891 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
892 __ should_not_reach_here();
893 break;
894 }
895
896 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
897
898 Register addr = G4;
899 Register cardtable = G5;
900 Register tmp = G1_scratch;
901 Register tmp2 = G3_scratch;
902 jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base;
903
904 Label not_already_dirty, restart, refill;
905
906 #ifdef _LP64
907 __ srlx(addr, CardTableModRefBS::card_shift, addr);
908 #else
909 __ srl(addr, CardTableModRefBS::card_shift, addr);
910 #endif
911
912 AddressLiteral rs(byte_map_base);
913 __ set(rs, cardtable); // cardtable := <card table base>
914 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
915
916 __ br_on_reg_cond(Assembler::rc_nz, /*annul*/false, Assembler::pt,
917 tmp, not_already_dirty);
918 // Get cardtable + tmp into a reg by itself -- useful in the take-the-branch
919 // case, harmless if not.
920 __ delayed()->add(addr, cardtable, tmp2);
921
922 // We didn't take the branch, so we're already dirty: return.
923 // Use return-from-leaf
924 __ retl();
925 __ delayed()->nop();
926
927 // Not dirty.
928 __ bind(not_already_dirty);
929 // First, dirty it.
930 __ stb(G0, tmp2, 0); // [cardPtr] := 0 (i.e., dirty).
931
932 Register tmp3 = cardtable;
933 Register tmp4 = tmp;
934
935 // these registers are now dead
936 addr = cardtable = tmp = noreg;
937
938 int dirty_card_q_index_byte_offset =
939 in_bytes(JavaThread::dirty_card_queue_offset() +
940 PtrQueue::byte_offset_of_index());
941 int dirty_card_q_buf_byte_offset =
942 in_bytes(JavaThread::dirty_card_queue_offset() +
943 PtrQueue::byte_offset_of_buf());
944 __ bind(restart);
945 __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, tmp3);
946
947 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pn,
948 tmp3, refill);
949 // If the branch is taken, no harm in executing this in the delay slot.
950 __ delayed()->ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, tmp4);
951 __ sub(tmp3, oopSize, tmp3);
952
953 __ st_ptr(tmp2, tmp4, tmp3); // [_buf + index] := <address_of_card>
954 // Use return-from-leaf
955 __ retl();
956 __ delayed()->st_ptr(tmp3, G2_thread, dirty_card_q_index_byte_offset);
957
958 __ bind(refill);
959 __ save_frame(0);
960
961 __ mov(tmp2, L0);
962 __ mov(tmp3, L1);
963 __ mov(tmp4, L2);
964
965 __ call_VM_leaf(L7_thread_cache,
966 CAST_FROM_FN_PTR(address,
967 DirtyCardQueueSet::handle_zero_index_for_thread),
968 G2_thread);
969
970 __ mov(L0, tmp2);
971 __ mov(L1, tmp3);
972 __ mov(L2, tmp4);
973
974 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
975 __ delayed()->restore();
976 }
977 break;
978 #endif // !SERIALGC
979
980 default:
981 { __ set_info("unimplemented entry", dont_gc_arguments);
982 __ save_frame(0);
983 __ set((int)id, O1);
984 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1);
985 __ should_not_reach_here();
986 }
987 break;
988 }
989 return oop_maps;
990 }
991
992
993 void Runtime1::generate_handle_exception(StubAssembler* sasm, OopMapSet* oop_maps, OopMap* oop_map, bool) {
994 Label no_deopt;
995
996 __ verify_not_null_oop(Oexception);
997
998 // save the exception and issuing pc in the thread
999 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset()));
1000 __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
1001
1002 // save the real return address and use the throwing pc as the return address to lookup (has bci & oop map)
1003 __ mov(I7, L0);
1004 __ mov(Oissuing_pc, I7);
1005 __ sub(I7, frame::pc_return_offset, I7);
1006 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
1007
1008 // Note: if nmethod has been deoptimized then regardless of
1009 // whether it had a handler or not we will deoptimize
1010 // by entering the deopt blob with a pending exception.
1011
1012 #ifdef ASSERT
1013 Label done;
1014 __ tst(O0);
1015 __ br(Assembler::notZero, false, Assembler::pn, done);
1016 __ delayed()->nop();
1017 __ stop("should have found address");
1018 __ bind(done);
1019 #endif
1020
1021 // restore the registers that were saved at the beginning and jump to the exception handler.
1022 restore_live_registers(sasm);
1023
1024 __ jmp(O0, 0);
1025 __ delayed()->restore();
1026
1027 oop_maps->add_gc_map(call_offset, oop_map);
1028 }
1029
1030
1031 #undef __
1032
1033 #define __ masm->