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 __