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 "incls/_precompiled.incl"
26 #include "incls/_c1_CodeStubs_sparc.cpp.incl"
27
28 #define __ ce->masm()->
29
30 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
31 bool throw_index_out_of_bounds_exception)
32 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
33 , _index(index)
34 {
35 _info = new CodeEmitInfo(info);
36 }
37
38
39 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
40 __ bind(_entry);
41
42 if (_index->is_register()) {
43 __ mov(_index->as_register(), G4);
44 } else {
45 __ set(_index->as_jint(), G4);
46 }
47 if (_throw_index_out_of_bounds_exception) {
48 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
49 } else {
50 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
51 }
52 __ delayed()->nop();
53 ce->add_call_info_here(_info);
54 ce->verify_oop_map(_info);
55 #ifdef ASSERT
56 __ should_not_reach_here();
57 #endif
58 }
59
60
61 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
62 __ bind(_entry);
63 __ set(_bci, G4);
64 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
65 __ delayed()->mov_or_nop(_method->as_register(), G5);
66 ce->add_call_info_here(_info);
67 ce->verify_oop_map(_info);
68
69 __ br(Assembler::always, true, Assembler::pt, _continuation);
70 __ delayed()->nop();
71 }
72
73
74 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
75 if (_offset != -1) {
76 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
77 }
78 __ bind(_entry);
79 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
80 __ delayed()->nop();
81 ce->add_call_info_here(_info);
82 ce->verify_oop_map(_info);
83 #ifdef ASSERT
84 __ should_not_reach_here();
85 #endif
86 }
87
88
89 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
90 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
91 __ bind(_entry);
92 __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
93 relocInfo::runtime_call_type);
94 __ delayed()->nop();
95 ce->add_call_info_here(_info);
96 ce->verify_oop_map(_info);
97 #ifdef ASSERT
98 __ should_not_reach_here();
99 #endif
100 }
101
102
103 // Implementation of SimpleExceptionStub
104 // Note: %g1 and %g3 are already in use
105 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
106 __ bind(_entry);
107 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
108
109 if (_obj->is_valid()) {
110 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
111 } else {
112 __ delayed()->mov(G0, G4);
113 }
114 ce->add_call_info_here(_info);
115 #ifdef ASSERT
116 __ should_not_reach_here();
117 #endif
118 }
119
120
121 // Implementation of ArrayStoreExceptionStub
122
123 ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info):
124 _info(info) {
125 }
126
127
128 void ArrayStoreExceptionStub::emit_code(LIR_Assembler* ce) {
129 __ bind(_entry);
130 __ call(Runtime1::entry_for(Runtime1::throw_array_store_exception_id), relocInfo::runtime_call_type);
131 __ delayed()->nop();
132 ce->add_call_info_here(_info);
133 ce->verify_oop_map(_info);
134 #ifdef ASSERT
135 __ should_not_reach_here();
136 #endif
137 }
138
139
140
141
142 // Implementation of NewInstanceStub
143
144 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
145 _result = result;
146 _klass = klass;
147 _klass_reg = klass_reg;
148 _info = new CodeEmitInfo(info);
149 assert(stub_id == Runtime1::new_instance_id ||
150 stub_id == Runtime1::fast_new_instance_id ||
151 stub_id == Runtime1::fast_new_instance_init_check_id,
152 "need new_instance id");
153 _stub_id = stub_id;
154 }
155
156
157 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
158 __ bind(_entry);
159 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
160 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
161 ce->add_call_info_here(_info);
162 ce->verify_oop_map(_info);
163 __ br(Assembler::always, false, Assembler::pt, _continuation);
164 __ delayed()->mov_or_nop(O0, _result->as_register());
165 }
166
167
168 // Implementation of NewTypeArrayStub
169 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
170 _klass_reg = klass_reg;
171 _length = length;
172 _result = result;
173 _info = new CodeEmitInfo(info);
174 }
175
176
177 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
178 __ bind(_entry);
179
180 __ mov(_length->as_register(), G4);
181 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
182 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
183 ce->add_call_info_here(_info);
184 ce->verify_oop_map(_info);
185 __ br(Assembler::always, false, Assembler::pt, _continuation);
186 __ delayed()->mov_or_nop(O0, _result->as_register());
187 }
188
189
190 // Implementation of NewObjectArrayStub
191
192 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
193 _klass_reg = klass_reg;
194 _length = length;
195 _result = result;
196 _info = new CodeEmitInfo(info);
197 }
198
199
200 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
201 __ bind(_entry);
202
203 __ mov(_length->as_register(), G4);
204 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
205 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
206 ce->add_call_info_here(_info);
207 ce->verify_oop_map(_info);
208 __ br(Assembler::always, false, Assembler::pt, _continuation);
209 __ delayed()->mov_or_nop(O0, _result->as_register());
210 }
211
212
213 // Implementation of MonitorAccessStubs
214 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
215 : MonitorAccessStub(obj_reg, lock_reg) {
216 _info = new CodeEmitInfo(info);
217 }
218
219
220 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
221 __ bind(_entry);
222 __ mov(_obj_reg->as_register(), G4);
223 if (ce->compilation()->has_fpu_code()) {
224 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
225 } else {
226 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
227 }
228 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
229 ce->add_call_info_here(_info);
230 ce->verify_oop_map(_info);
231 __ br(Assembler::always, true, Assembler::pt, _continuation);
232 __ delayed()->nop();
233 }
234
235
236 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
237 __ bind(_entry);
238 if (_compute_lock) {
239 ce->monitor_address(_monitor_ix, _lock_reg);
240 }
241 if (ce->compilation()->has_fpu_code()) {
242 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
243 } else {
244 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
245 }
246
247 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
248 __ br(Assembler::always, true, Assembler::pt, _continuation);
249 __ delayed()->nop();
250 }
251
252 // Implementation of patching:
253 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
254 // - Replace original code with a call to the stub
255 // At Runtime:
256 // - call to stub, jump to runtime
257 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
258 // - in runtime: after initializing class, restore original code, reexecute instruction
259
260 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
261
262 void PatchingStub::align_patch_site(MacroAssembler* ) {
263 // patch sites on sparc are always properly aligned.
264 }
265
266 void PatchingStub::emit_code(LIR_Assembler* ce) {
267 // copy original code here
268 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
269 "not enough room for call");
270 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
271
272 Label call_patch;
273
274 int being_initialized_entry = __ offset();
275
276 if (_id == load_klass_id) {
277 // produce a copy of the load klass instruction for use by the being initialized case
278 #ifdef ASSERT
279 address start = __ pc();
280 #endif
281 AddressLiteral addrlit(NULL, oop_Relocation::spec(_oop_index));
282 __ patchable_set(addrlit, _obj);
283
284 #ifdef ASSERT
285 for (int i = 0; i < _bytes_to_copy; i++) {
286 address ptr = (address)(_pc_start + i);
287 int a_byte = (*ptr) & 0xFF;
288 assert(a_byte == *start++, "should be the same code");
289 }
290 #endif
291 } else {
292 // make a copy the code which is going to be patched.
293 for (int i = 0; i < _bytes_to_copy; i++) {
294 address ptr = (address)(_pc_start + i);
295 int a_byte = (*ptr) & 0xFF;
296 __ a_byte (a_byte);
297 }
298 }
299
300 address end_of_patch = __ pc();
301 int bytes_to_skip = 0;
302 if (_id == load_klass_id) {
303 int offset = __ offset();
304 if (CommentedAssembly) {
305 __ block_comment(" being_initialized check");
306 }
307
308 // static field accesses have special semantics while the class
309 // initializer is being run so we emit a test which can be used to
310 // check that this code is being executed by the initializing
311 // thread.
312 assert(_obj != noreg, "must be a valid register");
313 assert(_oop_index >= 0, "must have oop index");
314 __ ld_ptr(_obj, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3);
315 __ cmp(G2_thread, G3);
316 __ br(Assembler::notEqual, false, Assembler::pn, call_patch);
317 __ delayed()->nop();
318
319 // load_klass patches may execute the patched code before it's
320 // copied back into place so we need to jump back into the main
321 // code of the nmethod to continue execution.
322 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
323 __ delayed()->nop();
324
325 // make sure this extra code gets skipped
326 bytes_to_skip += __ offset() - offset;
327 }
328
329 // Now emit the patch record telling the runtime how to find the
330 // pieces of the patch. We only need 3 bytes but it has to be
331 // aligned as an instruction so emit 4 bytes.
332 int sizeof_patch_record = 4;
333 bytes_to_skip += sizeof_patch_record;
334
335 // emit the offsets needed to find the code to patch
336 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
337
338 // Emit the patch record. We need to emit a full word, so emit an extra empty byte
339 __ a_byte(0);
340 __ a_byte(being_initialized_entry_offset);
341 __ a_byte(bytes_to_skip);
342 __ a_byte(_bytes_to_copy);
343 address patch_info_pc = __ pc();
344 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
345
346 address entry = __ pc();
347 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
348 address target = NULL;
349 switch (_id) {
350 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
351 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
352 default: ShouldNotReachHere();
353 }
354 __ bind(call_patch);
355
356 if (CommentedAssembly) {
357 __ block_comment("patch entry point");
358 }
359 __ call(target, relocInfo::runtime_call_type);
360 __ delayed()->nop();
361 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
362 ce->add_call_info_here(_info);
363 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
364 __ delayed()->nop();
365 if (_id == load_klass_id) {
366 CodeSection* cs = __ code_section();
367 address pc = (address)_pc_start;
368 RelocIterator iter(cs, pc, pc + 1);
369 relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none);
370
371 pc = (address)(_pc_start + NativeMovConstReg::add_offset);
372 RelocIterator iter2(cs, pc, pc+1);
373 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none);
374 }
375
376 }
377
378
379 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
380 __ bind(_entry);
381 __ call(SharedRuntime::deopt_blob()->unpack_with_reexecution());
382 __ delayed()->nop();
383 ce->add_call_info_here(_info);
384 debug_only(__ should_not_reach_here());
385 }
386
387
388 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
389 //---------------slow case: call to native-----------------
390 __ bind(_entry);
391 __ mov(src()->as_register(), O0);
392 __ mov(src_pos()->as_register(), O1);
393 __ mov(dst()->as_register(), O2);
394 __ mov(dst_pos()->as_register(), O3);
395 __ mov(length()->as_register(), O4);
396
397 ce->emit_static_call_stub();
398
399 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
400 __ delayed()->nop();
401 ce->add_call_info_here(info());
402 ce->verify_oop_map(info());
403
404 #ifndef PRODUCT
405 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
406 __ ld(O0, 0, O1);
407 __ inc(O1);
408 __ st(O1, 0, O0);
409 #endif
410
411 __ br(Assembler::always, false, Assembler::pt, _continuation);
412 __ delayed()->nop();
413 }
414
415
416 ///////////////////////////////////////////////////////////////////////////////////
417 #ifndef SERIALGC
418
419 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
420 __ bind(_entry);
421
422 assert(pre_val()->is_register(), "Precondition.");
423
424 Register pre_val_reg = pre_val()->as_register();
425
426 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false);
427 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
428 pre_val_reg, _continuation);
429 __ delayed()->nop();
430
431 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id));
432 __ delayed()->mov(pre_val_reg, G4);
433 __ br(Assembler::always, false, Assembler::pt, _continuation);
434 __ delayed()->nop();
435
436 }
437
438 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
439
440 jbyte* G1PostBarrierStub::byte_map_base_slow() {
441 BarrierSet* bs = Universe::heap()->barrier_set();
442 assert(bs->is_a(BarrierSet::G1SATBCTLogging),
443 "Must be if we're using this.");
444 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
445 }
446
447 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
448 __ bind(_entry);
449
450 assert(addr()->is_register(), "Precondition.");
451 assert(new_val()->is_register(), "Precondition.");
452 Register addr_reg = addr()->as_pointer_register();
453 Register new_val_reg = new_val()->as_register();
454 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
455 new_val_reg, _continuation);
456 __ delayed()->nop();
457
458 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id));
459 __ delayed()->mov(addr_reg, G4);
460 __ br(Assembler::always, false, Assembler::pt, _continuation);
461 __ delayed()->nop();
462 }
463
464 #endif // SERIALGC
465 ///////////////////////////////////////////////////////////////////////////////////
466
467 #undef __