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