1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_CodeStubs.hpp"
27 #include "c1/c1_FrameMap.hpp"
28 #include "c1/c1_LIRAssembler.hpp"
29 #include "c1/c1_MacroAssembler.hpp"
30 #include "c1/c1_Runtime1.hpp"
31 #include "nativeInst_sparc.hpp"
32 #include "runtime/sharedRuntime.hpp"
33 #include "vmreg_sparc.inline.hpp"
34 #ifndef SERIALGC
35 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
36 #endif
37
38 #define __ ce->masm()->
39
40 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
41 bool throw_index_out_of_bounds_exception)
42 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
43 , _index(index)
44 {
45 assert(info != NULL, "must have info");
46 _info = new CodeEmitInfo(info);
47 }
48
49
50 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
51 __ bind(_entry);
52
53 if (_index->is_register()) {
54 __ mov(_index->as_register(), G4);
55 } else {
56 __ set(_index->as_jint(), G4);
57 }
58 if (_throw_index_out_of_bounds_exception) {
59 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
60 } else {
61 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
62 }
63 __ delayed()->nop();
64 ce->add_call_info_here(_info);
65 ce->verify_oop_map(_info);
66 #ifdef ASSERT
67 __ should_not_reach_here();
68 #endif
69 }
70
71
72 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
73 __ bind(_entry);
74 __ set(_bci, G4);
75 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
76 __ delayed()->mov_or_nop(_method->as_register(), G5);
77 ce->add_call_info_here(_info);
78 ce->verify_oop_map(_info);
79
80 __ br(Assembler::always, true, Assembler::pt, _continuation);
81 __ delayed()->nop();
82 }
83
84
85 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
86 if (_offset != -1) {
87 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
88 }
89 __ bind(_entry);
90 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
91 __ delayed()->nop();
92 ce->add_call_info_here(_info);
93 ce->verify_oop_map(_info);
94 #ifdef ASSERT
95 __ should_not_reach_here();
96 #endif
97 }
98
99
100 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
101 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
102 __ bind(_entry);
103 __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
104 relocInfo::runtime_call_type);
105 __ delayed()->nop();
106 ce->add_call_info_here(_info);
107 ce->verify_oop_map(_info);
108 #ifdef ASSERT
109 __ should_not_reach_here();
110 #endif
111 }
112
113
114 // Implementation of SimpleExceptionStub
115 // Note: %g1 and %g3 are already in use
116 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
117 __ bind(_entry);
118 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
119
120 if (_obj->is_valid()) {
121 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
122 } else {
123 __ delayed()->mov(G0, G4);
124 }
125 ce->add_call_info_here(_info);
126 #ifdef ASSERT
127 __ should_not_reach_here();
128 #endif
129 }
130
131
132 // Implementation of ArrayStoreExceptionStub
133
134 ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info):
135 _info(info) {
136 }
137
138
139 void ArrayStoreExceptionStub::emit_code(LIR_Assembler* ce) {
140 __ bind(_entry);
141 __ call(Runtime1::entry_for(Runtime1::throw_array_store_exception_id), relocInfo::runtime_call_type);
142 __ delayed()->nop();
143 ce->add_call_info_here(_info);
144 ce->verify_oop_map(_info);
145 #ifdef ASSERT
146 __ should_not_reach_here();
147 #endif
148 }
149
150
151
152
153 // Implementation of NewInstanceStub
154
155 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
156 _result = result;
157 _klass = klass;
158 _klass_reg = klass_reg;
159 _info = new CodeEmitInfo(info);
160 assert(stub_id == Runtime1::new_instance_id ||
161 stub_id == Runtime1::fast_new_instance_id ||
162 stub_id == Runtime1::fast_new_instance_init_check_id,
163 "need new_instance id");
164 _stub_id = stub_id;
165 }
166
167
168 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
169 __ bind(_entry);
170 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
171 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
172 ce->add_call_info_here(_info);
173 ce->verify_oop_map(_info);
174 __ br(Assembler::always, false, Assembler::pt, _continuation);
175 __ delayed()->mov_or_nop(O0, _result->as_register());
176 }
177
178
179 // Implementation of NewTypeArrayStub
180 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
181 _klass_reg = klass_reg;
182 _length = length;
183 _result = result;
184 _info = new CodeEmitInfo(info);
185 }
186
187
188 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
189 __ bind(_entry);
190
191 __ mov(_length->as_register(), G4);
192 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
193 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
194 ce->add_call_info_here(_info);
195 ce->verify_oop_map(_info);
196 __ br(Assembler::always, false, Assembler::pt, _continuation);
197 __ delayed()->mov_or_nop(O0, _result->as_register());
198 }
199
200
201 // Implementation of NewObjectArrayStub
202
203 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
204 _klass_reg = klass_reg;
205 _length = length;
206 _result = result;
207 _info = new CodeEmitInfo(info);
208 }
209
210
211 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
212 __ bind(_entry);
213
214 __ mov(_length->as_register(), G4);
215 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
216 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
217 ce->add_call_info_here(_info);
218 ce->verify_oop_map(_info);
219 __ br(Assembler::always, false, Assembler::pt, _continuation);
220 __ delayed()->mov_or_nop(O0, _result->as_register());
221 }
222
223
224 // Implementation of MonitorAccessStubs
225 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
226 : MonitorAccessStub(obj_reg, lock_reg) {
227 _info = new CodeEmitInfo(info);
228 }
229
230
231 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
232 __ bind(_entry);
233 __ mov(_obj_reg->as_register(), G4);
234 if (ce->compilation()->has_fpu_code()) {
235 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
236 } else {
237 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
238 }
239 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
240 ce->add_call_info_here(_info);
241 ce->verify_oop_map(_info);
242 __ br(Assembler::always, true, Assembler::pt, _continuation);
243 __ delayed()->nop();
244 }
245
246
247 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
248 __ bind(_entry);
249 if (_compute_lock) {
250 ce->monitor_address(_monitor_ix, _lock_reg);
251 }
252 if (ce->compilation()->has_fpu_code()) {
253 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
254 } else {
255 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
256 }
257
258 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
259 __ br(Assembler::always, true, Assembler::pt, _continuation);
260 __ delayed()->nop();
261 }
262
263 // Implementation of patching:
264 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
265 // - Replace original code with a call to the stub
266 // At Runtime:
267 // - call to stub, jump to runtime
268 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
269 // - in runtime: after initializing class, restore original code, reexecute instruction
270
271 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
272
273 void PatchingStub::align_patch_site(MacroAssembler* ) {
274 // patch sites on sparc are always properly aligned.
275 }
276
277 void PatchingStub::emit_code(LIR_Assembler* ce) {
278 // copy original code here
279 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
280 "not enough room for call");
281 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
282
283 Label call_patch;
284
285 int being_initialized_entry = __ offset();
286
287 if (_id == load_klass_id) {
288 // produce a copy of the load klass instruction for use by the being initialized case
289 #ifdef ASSERT
290 address start = __ pc();
291 #endif
292 AddressLiteral addrlit(NULL, oop_Relocation::spec(_oop_index));
293 __ patchable_set(addrlit, _obj);
294
295 #ifdef ASSERT
296 for (int i = 0; i < _bytes_to_copy; i++) {
297 address ptr = (address)(_pc_start + i);
298 int a_byte = (*ptr) & 0xFF;
299 assert(a_byte == *start++, "should be the same code");
300 }
301 #endif
302 } else {
303 // make a copy the code which is going to be patched.
304 for (int i = 0; i < _bytes_to_copy; i++) {
305 address ptr = (address)(_pc_start + i);
306 int a_byte = (*ptr) & 0xFF;
307 __ a_byte (a_byte);
308 }
309 }
310
311 address end_of_patch = __ pc();
312 int bytes_to_skip = 0;
313 if (_id == load_klass_id) {
314 int offset = __ offset();
315 if (CommentedAssembly) {
316 __ block_comment(" being_initialized check");
317 }
318
319 // static field accesses have special semantics while the class
320 // initializer is being run so we emit a test which can be used to
321 // check that this code is being executed by the initializing
322 // thread.
323 assert(_obj != noreg, "must be a valid register");
324 assert(_oop_index >= 0, "must have oop index");
325 __ ld_ptr(_obj, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3);
326 __ cmp(G2_thread, G3);
327 __ br(Assembler::notEqual, false, Assembler::pn, call_patch);
328 __ delayed()->nop();
329
330 // load_klass patches may execute the patched code before it's
331 // copied back into place so we need to jump back into the main
332 // code of the nmethod to continue execution.
333 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
334 __ delayed()->nop();
335
336 // make sure this extra code gets skipped
337 bytes_to_skip += __ offset() - offset;
338 }
339
340 // Now emit the patch record telling the runtime how to find the
341 // pieces of the patch. We only need 3 bytes but it has to be
342 // aligned as an instruction so emit 4 bytes.
343 int sizeof_patch_record = 4;
344 bytes_to_skip += sizeof_patch_record;
345
346 // emit the offsets needed to find the code to patch
347 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
348
349 // Emit the patch record. We need to emit a full word, so emit an extra empty byte
350 __ a_byte(0);
351 __ a_byte(being_initialized_entry_offset);
352 __ a_byte(bytes_to_skip);
353 __ a_byte(_bytes_to_copy);
354 address patch_info_pc = __ pc();
355 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
356
357 address entry = __ pc();
358 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
359 address target = NULL;
360 switch (_id) {
361 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
362 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
363 default: ShouldNotReachHere();
364 }
365 __ bind(call_patch);
366
367 if (CommentedAssembly) {
368 __ block_comment("patch entry point");
369 }
370 __ call(target, relocInfo::runtime_call_type);
371 __ delayed()->nop();
372 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
373 ce->add_call_info_here(_info);
374 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
375 __ delayed()->nop();
376 if (_id == load_klass_id) {
377 CodeSection* cs = __ code_section();
378 address pc = (address)_pc_start;
379 RelocIterator iter(cs, pc, pc + 1);
380 relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none);
381
382 pc = (address)(_pc_start + NativeMovConstReg::add_offset);
383 RelocIterator iter2(cs, pc, pc+1);
384 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none);
385 }
386
387 }
388
389
390 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
391 __ bind(_entry);
392 __ call(SharedRuntime::deopt_blob()->unpack_with_reexecution());
393 __ delayed()->nop();
394 ce->add_call_info_here(_info);
395 debug_only(__ should_not_reach_here());
396 }
397
398
399 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
400 //---------------slow case: call to native-----------------
401 __ bind(_entry);
402 __ mov(src()->as_register(), O0);
403 __ mov(src_pos()->as_register(), O1);
404 __ mov(dst()->as_register(), O2);
405 __ mov(dst_pos()->as_register(), O3);
406 __ mov(length()->as_register(), O4);
407
408 ce->emit_static_call_stub();
409
410 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
411 __ delayed()->nop();
412 ce->add_call_info_here(info());
413 ce->verify_oop_map(info());
414
415 #ifndef PRODUCT
416 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
417 __ ld(O0, 0, O1);
418 __ inc(O1);
419 __ st(O1, 0, O0);
420 #endif
421
422 __ br(Assembler::always, false, Assembler::pt, _continuation);
423 __ delayed()->nop();
424 }
425
426
427 ///////////////////////////////////////////////////////////////////////////////////
428 #ifndef SERIALGC
429
430 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
431 __ bind(_entry);
432
433 assert(pre_val()->is_register(), "Precondition.");
434
435 Register pre_val_reg = pre_val()->as_register();
436
437 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false);
438 if (__ is_in_wdisp16_range(_continuation)) {
439 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
440 pre_val_reg, _continuation);
441 } else {
442 __ cmp(pre_val_reg, G0);
443 __ brx(Assembler::equal, false, Assembler::pn, _continuation);
444 }
445 __ delayed()->nop();
446
447 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id));
448 __ delayed()->mov(pre_val_reg, G4);
449 __ br(Assembler::always, false, Assembler::pt, _continuation);
450 __ delayed()->nop();
451
452 }
453
454 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
455
456 jbyte* G1PostBarrierStub::byte_map_base_slow() {
457 BarrierSet* bs = Universe::heap()->barrier_set();
458 assert(bs->is_a(BarrierSet::G1SATBCTLogging),
459 "Must be if we're using this.");
460 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
461 }
462
463 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
464 __ bind(_entry);
465
466 assert(addr()->is_register(), "Precondition.");
467 assert(new_val()->is_register(), "Precondition.");
468 Register addr_reg = addr()->as_pointer_register();
469 Register new_val_reg = new_val()->as_register();
470 if (__ is_in_wdisp16_range(_continuation)) {
471 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
472 new_val_reg, _continuation);
473 } else {
474 __ cmp(new_val_reg, G0);
475 __ brx(Assembler::equal, false, Assembler::pn, _continuation);
476 }
477 __ delayed()->nop();
478
479 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id));
480 __ delayed()->mov(addr_reg, G4);
481 __ br(Assembler::always, false, Assembler::pt, _continuation);
482 __ delayed()->nop();
483 }
484
485 #endif // SERIALGC
486 ///////////////////////////////////////////////////////////////////////////////////
487
488 #undef __