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 "asm/macroAssembler.inline.hpp" 27 #include "c1/c1_CodeStubs.hpp" 28 #include "c1/c1_FrameMap.hpp" 29 #include "c1/c1_LIRAssembler.hpp" 30 #include "c1/c1_MacroAssembler.hpp" 31 #include "c1/c1_Runtime1.hpp" 32 #include "nativeInst_sparc.hpp" 33 #include "runtime/sharedRuntime.hpp" 34 #include "utilities/macros.hpp" 35 #include "vmreg_sparc.inline.hpp" 36 37 #define __ ce->masm()-> 38 39 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array) 40 : _throw_index_out_of_bounds_exception(false), _index(index), _array(array) { 41 assert(info != NULL, "must have info"); 42 _info = new CodeEmitInfo(info); 43 } 44 45 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index) 46 : _throw_index_out_of_bounds_exception(true), _index(index), _array(NULL) { 47 assert(info != NULL, "must have info"); 48 _info = new CodeEmitInfo(info); 49 } 50 51 void RangeCheckStub::emit_code(LIR_Assembler* ce) { 52 __ bind(_entry); 53 54 if (_info->deoptimize_on_exception()) { 55 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 56 __ call(a, relocInfo::runtime_call_type); 57 __ delayed()->nop(); 58 ce->add_call_info_here(_info); 59 ce->verify_oop_map(_info); 60 debug_only(__ should_not_reach_here()); 61 return; 62 } 63 64 if (_index->is_register()) { 65 __ mov(_index->as_register(), G4); 66 } else { 67 __ set(_index->as_jint(), G4); 68 } 69 if (_throw_index_out_of_bounds_exception) { 70 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type); 71 } else { 72 __ mov(_array->as_pointer_register(), G5); 73 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type); 74 } 75 __ delayed()->nop(); 76 ce->add_call_info_here(_info); 77 ce->verify_oop_map(_info); 78 debug_only(__ should_not_reach_here()); 79 } 80 81 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { 82 _info = new CodeEmitInfo(info); 83 } 84 85 void PredicateFailedStub::emit_code(LIR_Assembler* ce) { 86 __ bind(_entry); 87 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 88 __ call(a, relocInfo::runtime_call_type); 89 __ delayed()->nop(); 90 ce->add_call_info_here(_info); 91 ce->verify_oop_map(_info); 92 debug_only(__ should_not_reach_here()); 93 } 94 95 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { 96 __ bind(_entry); 97 __ set(_bci, G4); 98 Metadata *m = _method->as_constant_ptr()->as_metadata(); 99 __ set_metadata_constant(m, G5); 100 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type); 101 __ delayed()->nop(); 102 ce->add_call_info_here(_info); 103 ce->verify_oop_map(_info); 104 105 __ br(Assembler::always, true, Assembler::pt, _continuation); 106 __ delayed()->nop(); 107 } 108 109 110 void DivByZeroStub::emit_code(LIR_Assembler* ce) { 111 if (_offset != -1) { 112 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 113 } 114 __ bind(_entry); 115 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type); 116 __ delayed()->nop(); 117 ce->add_call_info_here(_info); 118 ce->verify_oop_map(_info); 119 #ifdef ASSERT 120 __ should_not_reach_here(); 121 #endif 122 } 123 124 125 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { 126 address a; 127 if (_info->deoptimize_on_exception()) { 128 // Deoptimize, do not throw the exception, because it is probably wrong to do it here. 129 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 130 } else { 131 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id); 132 } 133 134 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 135 __ bind(_entry); 136 __ call(a, relocInfo::runtime_call_type); 137 __ delayed()->nop(); 138 ce->add_call_info_here(_info); 139 ce->verify_oop_map(_info); 140 #ifdef ASSERT 141 __ should_not_reach_here(); 142 #endif 143 } 144 145 146 // Implementation of SimpleExceptionStub 147 // Note: %g1 and %g3 are already in use 148 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { 149 __ bind(_entry); 150 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type); 151 152 if (_obj->is_valid()) { 153 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub 154 } else { 155 __ delayed()->mov(G0, G4); 156 } 157 ce->add_call_info_here(_info); 158 #ifdef ASSERT 159 __ should_not_reach_here(); 160 #endif 161 } 162 163 164 // Implementation of NewInstanceStub 165 166 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { 167 _result = result; 168 _klass = klass; 169 _klass_reg = klass_reg; 170 _info = new CodeEmitInfo(info); 171 assert(stub_id == Runtime1::new_instance_id || 172 stub_id == Runtime1::fast_new_instance_id || 173 stub_id == Runtime1::fast_new_instance_init_check_id, 174 "need new_instance id"); 175 _stub_id = stub_id; 176 } 177 178 179 void NewInstanceStub::emit_code(LIR_Assembler* ce) { 180 __ bind(_entry); 181 __ call(Runtime1::entry_for(_stub_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 NewTypeArrayStub 191 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 192 _klass_reg = klass_reg; 193 _length = length; 194 _result = result; 195 _info = new CodeEmitInfo(info); 196 } 197 198 199 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { 200 __ bind(_entry); 201 202 __ mov(_length->as_register(), G4); 203 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type); 204 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 205 ce->add_call_info_here(_info); 206 ce->verify_oop_map(_info); 207 __ br(Assembler::always, false, Assembler::pt, _continuation); 208 __ delayed()->mov_or_nop(O0, _result->as_register()); 209 } 210 211 212 // Implementation of NewObjectArrayStub 213 214 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 215 _klass_reg = klass_reg; 216 _length = length; 217 _result = result; 218 _info = new CodeEmitInfo(info); 219 } 220 221 222 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { 223 __ bind(_entry); 224 225 __ mov(_length->as_register(), G4); 226 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type); 227 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); 228 ce->add_call_info_here(_info); 229 ce->verify_oop_map(_info); 230 __ br(Assembler::always, false, Assembler::pt, _continuation); 231 __ delayed()->mov_or_nop(O0, _result->as_register()); 232 } 233 234 235 // Implementation of MonitorAccessStubs 236 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) 237 : MonitorAccessStub(obj_reg, lock_reg) { 238 _info = new CodeEmitInfo(info); 239 } 240 241 242 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { 243 __ bind(_entry); 244 __ mov(_obj_reg->as_register(), G4); 245 if (ce->compilation()->has_fpu_code()) { 246 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type); 247 } else { 248 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type); 249 } 250 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5); 251 ce->add_call_info_here(_info); 252 ce->verify_oop_map(_info); 253 __ br(Assembler::always, true, Assembler::pt, _continuation); 254 __ delayed()->nop(); 255 } 256 257 258 void MonitorExitStub::emit_code(LIR_Assembler* ce) { 259 __ bind(_entry); 260 if (_compute_lock) { 261 ce->monitor_address(_monitor_ix, _lock_reg); 262 } 263 if (ce->compilation()->has_fpu_code()) { 264 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type); 265 } else { 266 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type); 267 } 268 269 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4); 270 __ br(Assembler::always, true, Assembler::pt, _continuation); 271 __ delayed()->nop(); 272 } 273 274 // Implementation of patching: 275 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) 276 // - Replace original code with a call to the stub 277 // At Runtime: 278 // - call to stub, jump to runtime 279 // - in runtime: preserve all registers (especially objects, i.e., source and destination object) 280 // - in runtime: after initializing class, restore original code, reexecute instruction 281 282 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; 283 284 void PatchingStub::align_patch_site(MacroAssembler* ) { 285 // patch sites on sparc are always properly aligned. 286 } 287 288 void PatchingStub::emit_code(LIR_Assembler* ce) { 289 // copy original code here 290 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, 291 "not enough room for call"); 292 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes"); 293 294 Label call_patch; 295 296 int being_initialized_entry = __ offset(); 297 298 if (_id == load_klass_id) { 299 // produce a copy of the load klass instruction for use by the being initialized case 300 #ifdef ASSERT 301 address start = __ pc(); 302 #endif 303 AddressLiteral addrlit(NULL, metadata_Relocation::spec(_index)); 304 __ patchable_set(addrlit, _obj); 305 306 #ifdef ASSERT 307 for (int i = 0; i < _bytes_to_copy; i++) { 308 address ptr = (address)(_pc_start + i); 309 int a_byte = (*ptr) & 0xFF; 310 assert(a_byte == *start++, "should be the same code"); 311 } 312 #endif 313 } else if (_id == load_mirror_id || _id == load_appendix_id) { 314 // produce a copy of the load mirror instruction for use by the being initialized case 315 #ifdef ASSERT 316 address start = __ pc(); 317 #endif 318 AddressLiteral addrlit(NULL, oop_Relocation::spec(_index)); 319 __ patchable_set(addrlit, _obj); 320 321 #ifdef ASSERT 322 for (int i = 0; i < _bytes_to_copy; i++) { 323 address ptr = (address)(_pc_start + i); 324 int a_byte = (*ptr) & 0xFF; 325 assert(a_byte == *start++, "should be the same code"); 326 } 327 #endif 328 } else { 329 // make a copy the code which is going to be patched. 330 for (int i = 0; i < _bytes_to_copy; i++) { 331 address ptr = (address)(_pc_start + i); 332 int a_byte = (*ptr) & 0xFF; 333 __ emit_int8 (a_byte); 334 } 335 } 336 337 address end_of_patch = __ pc(); 338 int bytes_to_skip = 0; 339 if (_id == load_mirror_id) { 340 int offset = __ offset(); 341 if (CommentedAssembly) { 342 __ block_comment(" being_initialized check"); 343 } 344 345 // static field accesses have special semantics while the class 346 // initializer is being run so we emit a test which can be used to 347 // check that this code is being executed by the initializing 348 // thread. 349 assert(_obj != noreg, "must be a valid register"); 350 assert(_index >= 0, "must have oop index"); 351 __ ld_ptr(_obj, java_lang_Class::klass_offset_in_bytes(), G3); 352 __ ld_ptr(G3, in_bytes(InstanceKlass::init_thread_offset()), G3); 353 __ cmp_and_brx_short(G2_thread, G3, Assembler::notEqual, Assembler::pn, call_patch); 354 355 // load_klass patches may execute the patched code before it's 356 // copied back into place so we need to jump back into the main 357 // code of the nmethod to continue execution. 358 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation); 359 __ delayed()->nop(); 360 361 // make sure this extra code gets skipped 362 bytes_to_skip += __ offset() - offset; 363 } 364 365 // Now emit the patch record telling the runtime how to find the 366 // pieces of the patch. We only need 3 bytes but it has to be 367 // aligned as an instruction so emit 4 bytes. 368 int sizeof_patch_record = 4; 369 bytes_to_skip += sizeof_patch_record; 370 371 // emit the offsets needed to find the code to patch 372 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record; 373 374 // Emit the patch record. We need to emit a full word, so emit an extra empty byte 375 __ emit_int8(0); 376 __ emit_int8(being_initialized_entry_offset); 377 __ emit_int8(bytes_to_skip); 378 __ emit_int8(_bytes_to_copy); 379 address patch_info_pc = __ pc(); 380 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); 381 382 address entry = __ pc(); 383 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); 384 address target = NULL; 385 relocInfo::relocType reloc_type = relocInfo::none; 386 switch (_id) { 387 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; 388 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break; 389 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break; 390 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break; 391 default: ShouldNotReachHere(); 392 } 393 __ bind(call_patch); 394 395 if (CommentedAssembly) { 396 __ block_comment("patch entry point"); 397 } 398 __ call(target, relocInfo::runtime_call_type); 399 __ delayed()->nop(); 400 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); 401 ce->add_call_info_here(_info); 402 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry); 403 __ delayed()->nop(); 404 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { 405 CodeSection* cs = __ code_section(); 406 address pc = (address)_pc_start; 407 RelocIterator iter(cs, pc, pc + 1); 408 relocInfo::change_reloc_info_for_address(&iter, (address) pc, reloc_type, relocInfo::none); 409 410 pc = (address)(_pc_start + NativeMovConstReg::add_offset); 411 RelocIterator iter2(cs, pc, pc+1); 412 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, reloc_type, relocInfo::none); 413 } 414 415 } 416 417 418 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { 419 __ bind(_entry); 420 __ set(_trap_request, G4); 421 __ call(Runtime1::entry_for(Runtime1::deoptimize_id), relocInfo::runtime_call_type); 422 __ delayed()->nop(); 423 ce->add_call_info_here(_info); 424 DEBUG_ONLY(__ should_not_reach_here()); 425 } 426 427 428 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { 429 //---------------slow case: call to native----------------- 430 __ bind(_entry); 431 __ mov(src()->as_register(), O0); 432 __ mov(src_pos()->as_register(), O1); 433 __ mov(dst()->as_register(), O2); 434 __ mov(dst_pos()->as_register(), O3); 435 __ mov(length()->as_register(), O4); 436 437 ce->emit_static_call_stub(); 438 if (ce->compilation()->bailed_out()) { 439 return; // CodeCache is full 440 } 441 442 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type); 443 __ delayed()->nop(); 444 ce->add_call_info_here(info()); 445 ce->verify_oop_map(info()); 446 447 #ifndef PRODUCT 448 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0); 449 __ ld(O0, 0, O1); 450 __ inc(O1); 451 __ st(O1, 0, O0); 452 #endif 453 454 __ br(Assembler::always, false, Assembler::pt, _continuation); 455 __ delayed()->nop(); 456 } 457 458 #undef __