1 /* 2 * Copyright (c) 2008, 2020, 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 "classfile/javaClasses.hpp" 33 #include "memory/universe.hpp" 34 #include "nativeInst_arm.hpp" 35 #include "runtime/sharedRuntime.hpp" 36 #include "utilities/macros.hpp" 37 #include "vmreg_arm.inline.hpp" 38 39 #define __ ce->masm()-> 40 41 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) { 42 ShouldNotReachHere(); 43 } 44 45 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { 46 __ bind(_entry); 47 ce->store_parameter(_bci, 0); 48 ce->store_parameter(_method->as_constant_ptr()->as_metadata(), 1); 49 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type); 50 ce->add_call_info_here(_info); 51 ce->verify_oop_map(_info); 52 53 __ b(_continuation); 54 } 55 56 57 // TODO: ARM - is it possible to inline these stubs into the main code stream? 58 59 60 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array) 61 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) { 62 assert(info != NULL, "must have info"); 63 _info = new CodeEmitInfo(info); 64 } 65 66 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index) 67 : _index(index), _array(), _throw_index_out_of_bounds_exception(true) { 68 assert(info != NULL, "must have info"); 69 _info = new CodeEmitInfo(info); 70 } 71 72 void RangeCheckStub::emit_code(LIR_Assembler* ce) { 73 __ bind(_entry); 74 75 if (_info->deoptimize_on_exception()) { 76 __ call(Runtime1::entry_for(Runtime1::predicate_failed_trap_id), relocInfo::runtime_call_type); 77 ce->add_call_info_here(_info); 78 ce->verify_oop_map(_info); 79 debug_only(__ should_not_reach_here()); 80 return; 81 } 82 // Pass the array index on stack because all registers must be preserved 83 ce->verify_reserved_argument_area_size(_throw_index_out_of_bounds_exception ? 1 : 2); 84 if (_index->is_cpu_register()) { 85 __ str_32(_index->as_register(), Address(SP)); 86 } else { 87 __ mov_slow(Rtemp, _index->as_jint()); // Rtemp should be OK in C1 88 __ str_32(Rtemp, Address(SP)); 89 } 90 91 if (_throw_index_out_of_bounds_exception) { 92 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type); 93 } else { 94 __ str(_array->as_pointer_register(), Address(SP, BytesPerWord)); // ??? Correct offset? Correct instruction? 95 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type); 96 } 97 ce->add_call_info_here(_info); 98 ce->verify_oop_map(_info); 99 DEBUG_ONLY(STOP("RangeCheck");) 100 } 101 102 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { 103 _info = new CodeEmitInfo(info); 104 } 105 106 void PredicateFailedStub::emit_code(LIR_Assembler* ce) { 107 __ bind(_entry); 108 __ call(Runtime1::entry_for(Runtime1::predicate_failed_trap_id), relocInfo::runtime_call_type); 109 ce->add_call_info_here(_info); 110 ce->verify_oop_map(_info); 111 debug_only(__ should_not_reach_here()); 112 } 113 114 void DivByZeroStub::emit_code(LIR_Assembler* ce) { 115 if (_offset != -1) { 116 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 117 } 118 __ bind(_entry); 119 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), 120 relocInfo::runtime_call_type); 121 ce->add_call_info_here(_info); 122 DEBUG_ONLY(STOP("DivByZero");) 123 } 124 125 126 // Implementation of NewInstanceStub 127 128 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { 129 _result = result; 130 _klass = klass; 131 _klass_reg = klass_reg; 132 _info = new CodeEmitInfo(info); 133 assert(stub_id == Runtime1::new_instance_id || 134 stub_id == Runtime1::fast_new_instance_id || 135 stub_id == Runtime1::fast_new_instance_init_check_id, 136 "need new_instance id"); 137 _stub_id = stub_id; 138 } 139 140 141 void NewInstanceStub::emit_code(LIR_Assembler* ce) { 142 assert(_result->as_register() == R0, "runtime call setup"); 143 assert(_klass_reg->as_register() == R1, "runtime call setup"); 144 __ bind(_entry); 145 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type); 146 ce->add_call_info_here(_info); 147 ce->verify_oop_map(_info); 148 __ b(_continuation); 149 } 150 151 152 // Implementation of NewTypeArrayStub 153 154 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 155 _klass_reg = klass_reg; 156 _length = length; 157 _result = result; 158 _info = new CodeEmitInfo(info); 159 } 160 161 162 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { 163 assert(_result->as_register() == R0, "runtime call setup"); 164 assert(_klass_reg->as_register() == R1, "runtime call setup"); 165 assert(_length->as_register() == R2, "runtime call setup"); 166 __ bind(_entry); 167 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type); 168 ce->add_call_info_here(_info); 169 ce->verify_oop_map(_info); 170 __ b(_continuation); 171 } 172 173 174 // Implementation of NewObjectArrayStub 175 176 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { 177 _klass_reg = klass_reg; 178 _result = result; 179 _length = length; 180 _info = new CodeEmitInfo(info); 181 } 182 183 184 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { 185 assert(_result->as_register() == R0, "runtime call setup"); 186 assert(_klass_reg->as_register() == R1, "runtime call setup"); 187 assert(_length->as_register() == R2, "runtime call setup"); 188 __ bind(_entry); 189 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type); 190 ce->add_call_info_here(_info); 191 ce->verify_oop_map(_info); 192 __ b(_continuation); 193 } 194 195 196 // Implementation of MonitorAccessStubs 197 198 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) 199 : MonitorAccessStub(obj_reg, lock_reg) 200 { 201 _info = new CodeEmitInfo(info); 202 } 203 204 205 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { 206 __ bind(_entry); 207 const Register obj_reg = _obj_reg->as_pointer_register(); 208 const Register lock_reg = _lock_reg->as_pointer_register(); 209 210 ce->verify_reserved_argument_area_size(2); 211 if (obj_reg < lock_reg) { 212 __ stmia(SP, RegisterSet(obj_reg) | RegisterSet(lock_reg)); 213 } else { 214 __ str(obj_reg, Address(SP)); 215 __ str(lock_reg, Address(SP, BytesPerWord)); 216 } 217 218 Runtime1::StubID enter_id = ce->compilation()->has_fpu_code() ? 219 Runtime1::monitorenter_id : 220 Runtime1::monitorenter_nofpu_id; 221 __ call(Runtime1::entry_for(enter_id), relocInfo::runtime_call_type); 222 ce->add_call_info_here(_info); 223 ce->verify_oop_map(_info); 224 __ b(_continuation); 225 } 226 227 228 void MonitorExitStub::emit_code(LIR_Assembler* ce) { 229 __ bind(_entry); 230 if (_compute_lock) { 231 ce->monitor_address(_monitor_ix, _lock_reg); 232 } 233 const Register lock_reg = _lock_reg->as_pointer_register(); 234 235 ce->verify_reserved_argument_area_size(1); 236 __ str(lock_reg, Address(SP)); 237 238 // Non-blocking leaf routine - no call info needed 239 Runtime1::StubID exit_id = ce->compilation()->has_fpu_code() ? 240 Runtime1::monitorexit_id : 241 Runtime1::monitorexit_nofpu_id; 242 __ call(Runtime1::entry_for(exit_id), relocInfo::runtime_call_type); 243 __ b(_continuation); 244 } 245 246 void LoadKlassStub::emit_code(LIR_Assembler* ce) { 247 // Currently not needed. 248 Unimplemented(); 249 } 250 251 // Call return is directly after patch word 252 int PatchingStub::_patch_info_offset = 0; 253 254 void PatchingStub::align_patch_site(MacroAssembler* masm) { 255 #if 0 256 // TODO: investigate if we required to implement this 257 ShouldNotReachHere(); 258 #endif 259 } 260 261 void PatchingStub::emit_code(LIR_Assembler* ce) { 262 const int patchable_instruction_offset = 0; 263 264 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, 265 "not enough room for call"); 266 assert((_bytes_to_copy & 3) == 0, "must copy a multiple of four bytes"); 267 Label call_patch; 268 bool is_load = (_id == load_klass_id) || (_id == load_mirror_id) || (_id == load_appendix_id); 269 270 271 if (is_load && !VM_Version::supports_movw()) { 272 address start = __ pc(); 273 274 // The following sequence duplicates code provided in MacroAssembler::patchable_mov_oop() 275 // without creating relocation info entry. 276 277 assert((__ pc() - start) == patchable_instruction_offset, "should be"); 278 __ ldr(_obj, Address(PC)); 279 // Extra nop to handle case of large offset of oop placeholder (see NativeMovConstReg::set_data). 280 __ nop(); 281 282 #ifdef ASSERT 283 for (int i = 0; i < _bytes_to_copy; i++) { 284 assert(((address)_pc_start)[i] == start[i], "should be the same code"); 285 } 286 #endif // ASSERT 287 } 288 289 address being_initialized_entry = __ pc(); 290 if (CommentedAssembly) { 291 __ block_comment(" patch template"); 292 } 293 if (is_load) { 294 address start = __ pc(); 295 if (_id == load_mirror_id || _id == load_appendix_id) { 296 __ patchable_mov_oop(_obj, (jobject)Universe::non_oop_word(), _index); 297 } else { 298 __ patchable_mov_metadata(_obj, (Metadata*)Universe::non_oop_word(), _index); 299 } 300 #ifdef ASSERT 301 for (int i = 0; i < _bytes_to_copy; i++) { 302 assert(((address)_pc_start)[i] == start[i], "should be the same code"); 303 } 304 #endif // ASSERT 305 } else { 306 int* start = (int*)_pc_start; 307 int* end = start + (_bytes_to_copy / BytesPerInt); 308 while (start < end) { 309 __ emit_int32(*start++); 310 } 311 } 312 address end_of_patch = __ pc(); 313 314 int bytes_to_skip = 0; 315 if (_id == load_mirror_id) { 316 int offset = __ offset(); 317 if (CommentedAssembly) { 318 __ block_comment(" being_initialized check"); 319 } 320 321 assert(_obj != noreg, "must be a valid register"); 322 // Rtemp should be OK in C1 323 __ ldr(Rtemp, Address(_obj, java_lang_Class::klass_offset())); 324 __ ldr(Rtemp, Address(Rtemp, InstanceKlass::init_thread_offset())); 325 __ cmp(Rtemp, Rthread); 326 __ b(call_patch, ne); 327 __ b(_patch_site_continuation); 328 329 bytes_to_skip += __ offset() - offset; 330 } 331 332 if (CommentedAssembly) { 333 __ block_comment("patch data - 3 high bytes of the word"); 334 } 335 const int sizeof_patch_record = 4; 336 bytes_to_skip += sizeof_patch_record; 337 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record; 338 __ emit_int32(0xff | being_initialized_entry_offset << 8 | bytes_to_skip << 16 | _bytes_to_copy << 24); 339 340 address patch_info_pc = __ pc(); 341 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); 342 343 // runtime call will return here 344 Label call_return; 345 __ bind(call_return); 346 ce->add_call_info_here(_info); 347 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); 348 __ b(_patch_site_entry); 349 350 address entry = __ pc(); 351 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); 352 address target = NULL; 353 relocInfo::relocType reloc_type = relocInfo::none; 354 switch (_id) { 355 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; 356 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break; 357 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break; 358 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break; 359 default: ShouldNotReachHere(); 360 } 361 __ bind(call_patch); 362 363 if (CommentedAssembly) { 364 __ block_comment("patch entry point"); 365 } 366 367 // arrange for call to return just after patch word 368 __ adr(LR, call_return); 369 __ jump(target, relocInfo::runtime_call_type, Rtemp); 370 371 if (is_load) { 372 CodeSection* cs = __ code_section(); 373 address pc = (address)_pc_start; 374 RelocIterator iter(cs, pc, pc + 1); 375 relocInfo::change_reloc_info_for_address(&iter, pc, reloc_type, relocInfo::none); 376 } 377 } 378 379 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { 380 __ bind(_entry); 381 __ mov_slow(Rtemp, _trap_request); 382 ce->verify_reserved_argument_area_size(1); 383 __ str(Rtemp, Address(SP)); 384 __ call(Runtime1::entry_for(Runtime1::deoptimize_id), relocInfo::runtime_call_type); 385 ce->add_call_info_here(_info); 386 DEBUG_ONLY(__ should_not_reach_here()); 387 } 388 389 390 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { 391 address a; 392 if (_info->deoptimize_on_exception()) { 393 // Deoptimize, do not throw the exception, because it is 394 // probably wrong to do it here. 395 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); 396 } else { 397 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id); 398 } 399 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); 400 __ bind(_entry); 401 __ call(a, relocInfo::runtime_call_type); 402 ce->add_call_info_here(_info); 403 ce->verify_oop_map(_info); 404 DEBUG_ONLY(STOP("ImplicitNullCheck");) 405 } 406 407 408 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { 409 __ bind(_entry); 410 // Pass the object on stack because all registers must be preserved 411 if (_obj->is_cpu_register()) { 412 ce->verify_reserved_argument_area_size(1); 413 __ str(_obj->as_pointer_register(), Address(SP)); 414 } else { 415 assert(_obj->is_illegal(), "should be"); 416 } 417 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type); 418 ce->add_call_info_here(_info); 419 DEBUG_ONLY(STOP("SimpleException");) 420 } 421 422 423 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { 424 __ bind(_entry); 425 426 VMRegPair args[5]; 427 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT }; 428 SharedRuntime::java_calling_convention(signature, args, 5); 429 430 Register r[5]; 431 r[0] = src()->as_pointer_register(); 432 r[1] = src_pos()->as_register(); 433 r[2] = dst()->as_pointer_register(); 434 r[3] = dst_pos()->as_register(); 435 r[4] = length()->as_register(); 436 437 for (int i = 0; i < 5; i++) { 438 VMReg arg = args[i].first(); 439 if (arg->is_stack()) { 440 __ str(r[i], Address(SP, arg->reg2stack() * VMRegImpl::stack_slot_size)); 441 } else { 442 assert(r[i] == arg->as_Register(), "Calling conventions must match"); 443 } 444 } 445 446 ce->emit_static_call_stub(); 447 if (ce->compilation()->bailed_out()) { 448 return; // CodeCache is full 449 } 450 int ret_addr_offset = __ patchable_call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type); 451 assert(ret_addr_offset == __ offset(), "embedded return address not allowed"); 452 ce->add_call_info_here(info()); 453 ce->verify_oop_map(info()); 454 __ b(_continuation); 455 } 456 457 #undef __