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 "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 "utilities/macros.hpp"
34 #include "vmreg_sparc.inline.hpp"
35
36 #define __ ce->masm()->
37
38 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
39 bool throw_index_out_of_bounds_exception)
40 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
41 , _index(index)
42 {
43 assert(info != NULL, "must have info");
44 _info = new CodeEmitInfo(info);
45 }
46
47
48 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
49 __ bind(_entry);
50
51 if (_info->deoptimize_on_exception()) {
52 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
53 __ call(a, relocInfo::runtime_call_type);
54 __ delayed()->nop();
55 ce->add_call_info_here(_info);
56 ce->verify_oop_map(_info);
57 debug_only(__ should_not_reach_here());
58 return;
59 }
60
61 if (_index->is_register()) {
62 __ mov(_index->as_register(), G4);
63 } else {
64 __ set(_index->as_jint(), G4);
65 }
66 if (_throw_index_out_of_bounds_exception) {
67 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
68 } else {
69 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
70 }
71 __ delayed()->nop();
72 ce->add_call_info_here(_info);
73 ce->verify_oop_map(_info);
74 debug_only(__ should_not_reach_here());
75 }
76
77 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
78 _info = new CodeEmitInfo(info);
79 }
80
81 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
82 __ bind(_entry);
83 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
84 __ call(a, relocInfo::runtime_call_type);
85 __ delayed()->nop();
86 ce->add_call_info_here(_info);
87 ce->verify_oop_map(_info);
88 debug_only(__ should_not_reach_here());
89 }
90
91 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
92 __ bind(_entry);
93 __ set(_bci, G4);
94 Metadata *m = _method->as_constant_ptr()->as_metadata();
95 __ set_metadata_constant(m, G5);
96 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
97 __ delayed()->nop();
98 ce->add_call_info_here(_info);
99 ce->verify_oop_map(_info);
100
101 __ br(Assembler::always, true, Assembler::pt, _continuation);
102 __ delayed()->nop();
103 }
104
105
106 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
107 if (_offset != -1) {
108 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
109 }
110 __ bind(_entry);
111 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
112 __ delayed()->nop();
113 ce->add_call_info_here(_info);
114 ce->verify_oop_map(_info);
115 #ifdef ASSERT
116 __ should_not_reach_here();
117 #endif
118 }
119
120
121 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
122 address a;
123 if (_info->deoptimize_on_exception()) {
124 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
125 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
126 } else {
127 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
128 }
129
130 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
131 __ bind(_entry);
132 __ call(a, relocInfo::runtime_call_type);
133 __ delayed()->nop();
134 ce->add_call_info_here(_info);
135 ce->verify_oop_map(_info);
136 #ifdef ASSERT
137 __ should_not_reach_here();
138 #endif
139 }
140
141
142 // Implementation of SimpleExceptionStub
143 // Note: %g1 and %g3 are already in use
144 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
145 __ bind(_entry);
146 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
147
148 if (_obj->is_valid()) {
149 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
150 } else {
151 __ delayed()->mov(G0, G4);
152 }
153 ce->add_call_info_here(_info);
154 #ifdef ASSERT
155 __ should_not_reach_here();
156 #endif
157 }
158
159
160 // Implementation of NewInstanceStub
161
162 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
163 _result = result;
164 _klass = klass;
165 _klass_reg = klass_reg;
166 _info = new CodeEmitInfo(info);
167 assert(stub_id == Runtime1::new_instance_id ||
168 stub_id == Runtime1::fast_new_instance_id ||
169 stub_id == Runtime1::fast_new_instance_init_check_id,
170 "need new_instance id");
171 _stub_id = stub_id;
172 }
173
174
175 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
176 __ bind(_entry);
177 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
178 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
179 ce->add_call_info_here(_info);
180 ce->verify_oop_map(_info);
181 __ br(Assembler::always, false, Assembler::pt, _continuation);
182 __ delayed()->mov_or_nop(O0, _result->as_register());
183 }
184
185
186 // Implementation of NewTypeArrayStub
187 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
188 _klass_reg = klass_reg;
189 _length = length;
190 _result = result;
191 _info = new CodeEmitInfo(info);
192 }
193
194
195 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
196 __ bind(_entry);
197
198 __ mov(_length->as_register(), G4);
199 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
200 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
201 ce->add_call_info_here(_info);
202 ce->verify_oop_map(_info);
203 __ br(Assembler::always, false, Assembler::pt, _continuation);
204 __ delayed()->mov_or_nop(O0, _result->as_register());
205 }
206
207
208 // Implementation of NewObjectArrayStub
209
210 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
211 _klass_reg = klass_reg;
212 _length = length;
213 _result = result;
214 _info = new CodeEmitInfo(info);
215 }
216
217
218 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
219 __ bind(_entry);
220
221 __ mov(_length->as_register(), G4);
222 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
223 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
224 ce->add_call_info_here(_info);
225 ce->verify_oop_map(_info);
226 __ br(Assembler::always, false, Assembler::pt, _continuation);
227 __ delayed()->mov_or_nop(O0, _result->as_register());
228 }
229
230
231 // Implementation of MonitorAccessStubs
232 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
233 : MonitorAccessStub(obj_reg, lock_reg) {
234 _info = new CodeEmitInfo(info);
235 }
236
237
238 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
239 __ bind(_entry);
240 __ mov(_obj_reg->as_register(), G4);
241 if (ce->compilation()->has_fpu_code()) {
242 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
243 } else {
244 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
245 }
246 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
247 ce->add_call_info_here(_info);
248 ce->verify_oop_map(_info);
249 __ br(Assembler::always, true, Assembler::pt, _continuation);
250 __ delayed()->nop();
251 }
252
253
254 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
255 __ bind(_entry);
256 if (_compute_lock) {
257 ce->monitor_address(_monitor_ix, _lock_reg);
258 }
259 if (ce->compilation()->has_fpu_code()) {
260 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
261 } else {
262 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
263 }
264
265 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
266 __ br(Assembler::always, true, Assembler::pt, _continuation);
267 __ delayed()->nop();
268 }
269
270 // Implementation of patching:
271 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
272 // - Replace original code with a call to the stub
273 // At Runtime:
274 // - call to stub, jump to runtime
275 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
276 // - in runtime: after initializing class, restore original code, reexecute instruction
277
278 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
279
280 void PatchingStub::align_patch_site(MacroAssembler* ) {
281 // patch sites on sparc are always properly aligned.
282 }
283
284 void PatchingStub::emit_code(LIR_Assembler* ce) {
285 // copy original code here
286 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
287 "not enough room for call");
288 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
289
290 Label call_patch;
291
292 int being_initialized_entry = __ offset();
293
294 if (_id == load_klass_id) {
295 // produce a copy of the load klass instruction for use by the being initialized case
296 #ifdef ASSERT
297 address start = __ pc();
298 #endif
299 AddressLiteral addrlit(NULL, metadata_Relocation::spec(_index));
300 __ patchable_set(addrlit, _obj);
301
302 #ifdef ASSERT
303 for (int i = 0; i < _bytes_to_copy; i++) {
304 address ptr = (address)(_pc_start + i);
305 int a_byte = (*ptr) & 0xFF;
306 assert(a_byte == *start++, "should be the same code");
307 }
308 #endif
309 } else if (_id == load_mirror_id || _id == load_appendix_id) {
310 // produce a copy of the load mirror instruction for use by the being initialized case
311 #ifdef ASSERT
312 address start = __ pc();
313 #endif
314 AddressLiteral addrlit(NULL, oop_Relocation::spec(_index));
315 __ patchable_set(addrlit, _obj);
316
317 #ifdef ASSERT
318 for (int i = 0; i < _bytes_to_copy; i++) {
319 address ptr = (address)(_pc_start + i);
320 int a_byte = (*ptr) & 0xFF;
321 assert(a_byte == *start++, "should be the same code");
322 }
323 #endif
324 } else {
325 // make a copy the code which is going to be patched.
326 for (int i = 0; i < _bytes_to_copy; i++) {
327 address ptr = (address)(_pc_start + i);
328 int a_byte = (*ptr) & 0xFF;
329 __ emit_int8 (a_byte);
330 }
331 }
332
333 address end_of_patch = __ pc();
334 int bytes_to_skip = 0;
335 if (_id == load_mirror_id) {
336 int offset = __ offset();
337 if (CommentedAssembly) {
338 __ block_comment(" being_initialized check");
339 }
340
341 // static field accesses have special semantics while the class
342 // initializer is being run so we emit a test which can be used to
343 // check that this code is being executed by the initializing
344 // thread.
345 assert(_obj != noreg, "must be a valid register");
346 assert(_index >= 0, "must have oop index");
347 __ ld_ptr(_obj, java_lang_Class::klass_offset_in_bytes(), G3);
348 __ ld_ptr(G3, in_bytes(InstanceKlass::init_thread_offset()), G3);
349 __ cmp_and_brx_short(G2_thread, G3, Assembler::notEqual, Assembler::pn, call_patch);
350
351 // load_klass patches may execute the patched code before it's
352 // copied back into place so we need to jump back into the main
353 // code of the nmethod to continue execution.
354 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
355 __ delayed()->nop();
356
357 // make sure this extra code gets skipped
358 bytes_to_skip += __ offset() - offset;
359 }
360
361 // Now emit the patch record telling the runtime how to find the
362 // pieces of the patch. We only need 3 bytes but it has to be
363 // aligned as an instruction so emit 4 bytes.
364 int sizeof_patch_record = 4;
365 bytes_to_skip += sizeof_patch_record;
366
367 // emit the offsets needed to find the code to patch
368 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
369
370 // Emit the patch record. We need to emit a full word, so emit an extra empty byte
371 __ emit_int8(0);
372 __ emit_int8(being_initialized_entry_offset);
373 __ emit_int8(bytes_to_skip);
374 __ emit_int8(_bytes_to_copy);
375 address patch_info_pc = __ pc();
376 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
377
378 address entry = __ pc();
379 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
380 address target = NULL;
381 relocInfo::relocType reloc_type = relocInfo::none;
382 switch (_id) {
383 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
384 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
385 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
386 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break;
387 default: ShouldNotReachHere();
388 }
389 __ bind(call_patch);
390
391 if (CommentedAssembly) {
392 __ block_comment("patch entry point");
393 }
394 __ call(target, relocInfo::runtime_call_type);
395 __ delayed()->nop();
396 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
397 ce->add_call_info_here(_info);
398 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
399 __ delayed()->nop();
400 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
401 CodeSection* cs = __ code_section();
402 address pc = (address)_pc_start;
403 RelocIterator iter(cs, pc, pc + 1);
404 relocInfo::change_reloc_info_for_address(&iter, (address) pc, reloc_type, relocInfo::none);
405
406 pc = (address)(_pc_start + NativeMovConstReg::add_offset);
407 RelocIterator iter2(cs, pc, pc+1);
408 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, reloc_type, relocInfo::none);
409 }
410
411 }
412
413
414 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
415 __ bind(_entry);
416 __ set(_trap_request, G4);
417 __ call(Runtime1::entry_for(Runtime1::deoptimize_id), relocInfo::runtime_call_type);
418 __ delayed()->nop();
419 ce->add_call_info_here(_info);
420 DEBUG_ONLY(__ should_not_reach_here());
421 }
422
423
424 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
425 //---------------slow case: call to native-----------------
426 __ bind(_entry);
427 __ mov(src()->as_register(), O0);
428 __ mov(src_pos()->as_register(), O1);
429 __ mov(dst()->as_register(), O2);
430 __ mov(dst_pos()->as_register(), O3);
431 __ mov(length()->as_register(), O4);
432
433 ce->emit_static_call_stub();
434 if (ce->compilation()->bailed_out()) {
435 return; // CodeCache is full
436 }
437
438 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
439 __ delayed()->nop();
440 ce->add_call_info_here(info());
441 ce->verify_oop_map(info());
442
443 #ifndef PRODUCT
444 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
445 __ ld(O0, 0, O1);
446 __ inc(O1);
447 __ st(O1, 0, O0);
448 #endif
449
450 __ br(Assembler::always, false, Assembler::pt, _continuation);
451 __ delayed()->nop();
452 }
453
454 #undef __