1 /* 2 * Copyright (c) 1997, 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 "interp_masm_x86.hpp" 27 #include "interpreter/interpreter.hpp" 28 #include "interpreter/interpreterRuntime.hpp" 29 #include "logging/log.hpp" 30 #include "memory/vtBuffer.hpp" 31 #include "oops/arrayOop.hpp" 32 #include "oops/markOop.hpp" 33 #include "oops/methodData.hpp" 34 #include "oops/method.hpp" 35 #include "oops/valueKlass.hpp" 36 #include "prims/jvmtiExport.hpp" 37 #include "prims/jvmtiThreadState.hpp" 38 #include "runtime/basicLock.hpp" 39 #include "runtime/biasedLocking.hpp" 40 #include "runtime/frame.inline.hpp" 41 #include "runtime/safepointMechanism.hpp" 42 #include "runtime/sharedRuntime.hpp" 43 #include "runtime/thread.inline.hpp" 44 45 // Implementation of InterpreterMacroAssembler 46 47 void InterpreterMacroAssembler::jump_to_entry(address entry) { 48 assert(entry, "Entry must have been generated by now"); 49 jump(RuntimeAddress(entry)); 50 } 51 52 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) { 53 Label update, next, none; 54 55 verify_oop(obj); 56 57 testptr(obj, obj); 58 jccb(Assembler::notZero, update); 59 orptr(mdo_addr, TypeEntries::null_seen); 60 jmpb(next); 61 62 bind(update); 63 load_klass(obj, obj); 64 65 xorptr(obj, mdo_addr); 66 testptr(obj, TypeEntries::type_klass_mask); 67 jccb(Assembler::zero, next); // klass seen before, nothing to 68 // do. The unknown bit may have been 69 // set already but no need to check. 70 71 testptr(obj, TypeEntries::type_unknown); 72 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 73 74 cmpptr(mdo_addr, 0); 75 jccb(Assembler::equal, none); 76 cmpptr(mdo_addr, TypeEntries::null_seen); 77 jccb(Assembler::equal, none); 78 // There is a chance that the checks above (re-reading profiling 79 // data from memory) fail if another thread has just set the 80 // profiling to this obj's klass 81 xorptr(obj, mdo_addr); 82 testptr(obj, TypeEntries::type_klass_mask); 83 jccb(Assembler::zero, next); 84 85 // different than before. Cannot keep accurate profile. 86 orptr(mdo_addr, TypeEntries::type_unknown); 87 jmpb(next); 88 89 bind(none); 90 // first time here. Set profile type. 91 movptr(mdo_addr, obj); 92 93 bind(next); 94 } 95 96 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) { 97 if (!ProfileInterpreter) { 98 return; 99 } 100 101 if (MethodData::profile_arguments() || MethodData::profile_return()) { 102 Label profile_continue; 103 104 test_method_data_pointer(mdp, profile_continue); 105 106 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size()); 107 108 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag); 109 jcc(Assembler::notEqual, profile_continue); 110 111 if (MethodData::profile_arguments()) { 112 Label done; 113 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset()); 114 addptr(mdp, off_to_args); 115 116 for (int i = 0; i < TypeProfileArgsLimit; i++) { 117 if (i > 0 || MethodData::profile_return()) { 118 // If return value type is profiled we may have no argument to profile 119 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 120 subl(tmp, i*TypeStackSlotEntries::per_arg_count()); 121 cmpl(tmp, TypeStackSlotEntries::per_arg_count()); 122 jcc(Assembler::less, done); 123 } 124 movptr(tmp, Address(callee, Method::const_offset())); 125 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset())); 126 // stack offset o (zero based) from the start of the argument 127 // list, for n arguments translates into offset n - o - 1 from 128 // the end of the argument list 129 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args)); 130 subl(tmp, 1); 131 Address arg_addr = argument_address(tmp); 132 movptr(tmp, arg_addr); 133 134 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args); 135 profile_obj_type(tmp, mdo_arg_addr); 136 137 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size()); 138 addptr(mdp, to_add); 139 off_to_args += to_add; 140 } 141 142 if (MethodData::profile_return()) { 143 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 144 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count()); 145 } 146 147 bind(done); 148 149 if (MethodData::profile_return()) { 150 // We're right after the type profile for the last 151 // argument. tmp is the number of cells left in the 152 // CallTypeData/VirtualCallTypeData to reach its end. Non null 153 // if there's a return to profile. 154 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type"); 155 shll(tmp, exact_log2(DataLayout::cell_size)); 156 addptr(mdp, tmp); 157 } 158 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp); 159 } else { 160 assert(MethodData::profile_return(), "either profile call args or call ret"); 161 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size())); 162 } 163 164 // mdp points right after the end of the 165 // CallTypeData/VirtualCallTypeData, right after the cells for the 166 // return value type if there's one 167 168 bind(profile_continue); 169 } 170 } 171 172 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) { 173 assert_different_registers(mdp, ret, tmp, _bcp_register); 174 if (ProfileInterpreter && MethodData::profile_return()) { 175 Label profile_continue, done; 176 177 test_method_data_pointer(mdp, profile_continue); 178 179 if (MethodData::profile_return_jsr292_only()) { 180 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2"); 181 182 // If we don't profile all invoke bytecodes we must make sure 183 // it's a bytecode we indeed profile. We can't go back to the 184 // begining of the ProfileData we intend to update to check its 185 // type because we're right after it and we don't known its 186 // length 187 Label do_profile; 188 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic); 189 jcc(Assembler::equal, do_profile); 190 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle); 191 jcc(Assembler::equal, do_profile); 192 get_method(tmp); 193 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm); 194 jcc(Assembler::notEqual, profile_continue); 195 196 bind(do_profile); 197 } 198 199 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size())); 200 mov(tmp, ret); 201 profile_obj_type(tmp, mdo_ret_addr); 202 203 bind(profile_continue); 204 } 205 } 206 207 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) { 208 if (ProfileInterpreter && MethodData::profile_parameters()) { 209 Label profile_continue, done; 210 211 test_method_data_pointer(mdp, profile_continue); 212 213 // Load the offset of the area within the MDO used for 214 // parameters. If it's negative we're not profiling any parameters 215 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()))); 216 testl(tmp1, tmp1); 217 jcc(Assembler::negative, profile_continue); 218 219 // Compute a pointer to the area for parameters from the offset 220 // and move the pointer to the slot for the last 221 // parameters. Collect profiling from last parameter down. 222 // mdo start + parameters offset + array length - 1 223 addptr(mdp, tmp1); 224 movptr(tmp1, Address(mdp, ArrayData::array_len_offset())); 225 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 226 227 Label loop; 228 bind(loop); 229 230 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0)); 231 int type_base = in_bytes(ParametersTypeData::type_offset(0)); 232 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size); 233 Address arg_off(mdp, tmp1, per_arg_scale, off_base); 234 Address arg_type(mdp, tmp1, per_arg_scale, type_base); 235 236 // load offset on the stack from the slot for this parameter 237 movptr(tmp2, arg_off); 238 negptr(tmp2); 239 // read the parameter from the local area 240 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale())); 241 242 // profile the parameter 243 profile_obj_type(tmp2, arg_type); 244 245 // go to next parameter 246 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 247 jcc(Assembler::positive, loop); 248 249 bind(profile_continue); 250 } 251 } 252 253 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, 254 int number_of_arguments) { 255 // interpreter specific 256 // 257 // Note: No need to save/restore bcp & locals registers 258 // since these are callee saved registers and no blocking/ 259 // GC can happen in leaf calls. 260 // Further Note: DO NOT save/restore bcp/locals. If a caller has 261 // already saved them so that it can use rsi/rdi as temporaries 262 // then a save/restore here will DESTROY the copy the caller 263 // saved! There used to be a save_bcp() that only happened in 264 // the ASSERT path (no restore_bcp). Which caused bizarre failures 265 // when jvm built with ASSERTs. 266 #ifdef ASSERT 267 { 268 Label L; 269 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 270 jcc(Assembler::equal, L); 271 stop("InterpreterMacroAssembler::call_VM_leaf_base:" 272 " last_sp != NULL"); 273 bind(L); 274 } 275 #endif 276 // super call 277 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 278 // interpreter specific 279 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals 280 // but since they may not have been saved (and we don't want to 281 // save them here (see note above) the assert is invalid. 282 } 283 284 void InterpreterMacroAssembler::call_VM_base(Register oop_result, 285 Register java_thread, 286 Register last_java_sp, 287 address entry_point, 288 int number_of_arguments, 289 bool check_exceptions) { 290 // interpreter specific 291 // 292 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't 293 // really make a difference for these runtime calls, since they are 294 // slow anyway. Btw., bcp must be saved/restored since it may change 295 // due to GC. 296 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");) 297 save_bcp(); 298 #ifdef ASSERT 299 { 300 Label L; 301 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 302 jcc(Assembler::equal, L); 303 stop("InterpreterMacroAssembler::call_VM_base:" 304 " last_sp != NULL"); 305 bind(L); 306 } 307 #endif /* ASSERT */ 308 // super call 309 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, 310 entry_point, number_of_arguments, 311 check_exceptions); 312 // interpreter specific 313 restore_bcp(); 314 restore_locals(); 315 } 316 317 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { 318 if (JvmtiExport::can_pop_frame()) { 319 Label L; 320 // Initiate popframe handling only if it is not already being 321 // processed. If the flag has the popframe_processing bit set, it 322 // means that this code is called *during* popframe handling - we 323 // don't want to reenter. 324 // This method is only called just after the call into the vm in 325 // call_VM_base, so the arg registers are available. 326 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit 327 LP64_ONLY(c_rarg0); 328 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset())); 329 testl(pop_cond, JavaThread::popframe_pending_bit); 330 jcc(Assembler::zero, L); 331 testl(pop_cond, JavaThread::popframe_processing_bit); 332 jcc(Assembler::notZero, L); 333 // Call Interpreter::remove_activation_preserving_args_entry() to get the 334 // address of the same-named entrypoint in the generated interpreter code. 335 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); 336 jmp(rax); 337 bind(L); 338 NOT_LP64(get_thread(java_thread);) 339 } 340 } 341 342 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { 343 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 344 NOT_LP64(get_thread(thread);) 345 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 346 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); 347 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); 348 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); 349 #ifdef _LP64 350 switch (state) { 351 case atos: movptr(rax, oop_addr); 352 movptr(oop_addr, (int32_t)NULL_WORD); 353 verify_oop(rax, state); break; 354 case ltos: movptr(rax, val_addr); break; 355 case btos: // fall through 356 case ztos: // fall through 357 case ctos: // fall through 358 case stos: // fall through 359 case itos: movl(rax, val_addr); break; 360 case ftos: load_float(val_addr); break; 361 case dtos: load_double(val_addr); break; 362 case vtos: /* nothing to do */ break; 363 default : ShouldNotReachHere(); 364 } 365 // Clean up tos value in the thread object 366 movl(tos_addr, (int) ilgl); 367 movl(val_addr, (int32_t) NULL_WORD); 368 #else 369 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() 370 + in_ByteSize(wordSize)); 371 switch (state) { 372 case atos: movptr(rax, oop_addr); 373 movptr(oop_addr, NULL_WORD); 374 verify_oop(rax, state); break; 375 case ltos: 376 movl(rdx, val_addr1); // fall through 377 case btos: // fall through 378 case ztos: // fall through 379 case ctos: // fall through 380 case stos: // fall through 381 case itos: movl(rax, val_addr); break; 382 case ftos: load_float(val_addr); break; 383 case dtos: load_double(val_addr); break; 384 case vtos: /* nothing to do */ break; 385 default : ShouldNotReachHere(); 386 } 387 #endif // _LP64 388 // Clean up tos value in the thread object 389 movl(tos_addr, (int32_t) ilgl); 390 movptr(val_addr, NULL_WORD); 391 NOT_LP64(movptr(val_addr1, NULL_WORD);) 392 } 393 394 395 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { 396 if (JvmtiExport::can_force_early_return()) { 397 Label L; 398 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread); 399 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread); 400 401 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 402 testptr(tmp, tmp); 403 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; 404 405 // Initiate earlyret handling only if it is not already being processed. 406 // If the flag has the earlyret_processing bit set, it means that this code 407 // is called *during* earlyret handling - we don't want to reenter. 408 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset())); 409 cmpl(tmp, JvmtiThreadState::earlyret_pending); 410 jcc(Assembler::notEqual, L); 411 412 // Call Interpreter::remove_activation_early_entry() to get the address of the 413 // same-named entrypoint in the generated interpreter code. 414 NOT_LP64(get_thread(java_thread);) 415 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 416 #ifdef _LP64 417 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 418 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp); 419 #else 420 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 421 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1); 422 #endif // _LP64 423 jmp(rax); 424 bind(L); 425 NOT_LP64(get_thread(java_thread);) 426 } 427 } 428 429 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) { 430 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); 431 load_unsigned_short(reg, Address(_bcp_register, bcp_offset)); 432 bswapl(reg); 433 shrl(reg, 16); 434 } 435 436 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, 437 int bcp_offset, 438 size_t index_size) { 439 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); 440 if (index_size == sizeof(u2)) { 441 load_unsigned_short(index, Address(_bcp_register, bcp_offset)); 442 } else if (index_size == sizeof(u4)) { 443 movl(index, Address(_bcp_register, bcp_offset)); 444 // Check if the secondary index definition is still ~x, otherwise 445 // we have to change the following assembler code to calculate the 446 // plain index. 447 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); 448 notl(index); // convert to plain index 449 } else if (index_size == sizeof(u1)) { 450 load_unsigned_byte(index, Address(_bcp_register, bcp_offset)); 451 } else { 452 ShouldNotReachHere(); 453 } 454 } 455 456 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, 457 Register index, 458 int bcp_offset, 459 size_t index_size) { 460 assert_different_registers(cache, index); 461 get_cache_index_at_bcp(index, bcp_offset, index_size); 462 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 463 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 464 // convert from field index to ConstantPoolCacheEntry index 465 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); 466 shll(index, 2); 467 } 468 469 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, 470 Register index, 471 Register bytecode, 472 int byte_no, 473 int bcp_offset, 474 size_t index_size) { 475 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); 476 // We use a 32-bit load here since the layout of 64-bit words on 477 // little-endian machines allow us that. 478 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); 479 const int shift_count = (1 + byte_no) * BitsPerByte; 480 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || 481 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), 482 "correct shift count"); 483 shrl(bytecode, shift_count); 484 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); 485 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); 486 } 487 488 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, 489 Register tmp, 490 int bcp_offset, 491 size_t index_size) { 492 assert(cache != tmp, "must use different register"); 493 get_cache_index_at_bcp(tmp, bcp_offset, index_size); 494 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 495 // convert from field index to ConstantPoolCacheEntry index 496 // and from word offset to byte offset 497 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); 498 shll(tmp, 2 + LogBytesPerWord); 499 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 500 // skip past the header 501 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 502 addptr(cache, tmp); // construct pointer to cache entry 503 } 504 505 // Load object from cpool->resolved_references(index) 506 void InterpreterMacroAssembler::load_resolved_reference_at_index( 507 Register result, Register index, Register tmp) { 508 assert_different_registers(result, index); 509 510 get_constant_pool(result); 511 // load pointer for resolved_references[] objArray 512 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes())); 513 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes())); 514 resolve_oop_handle(result, tmp); 515 load_heap_oop(result, Address(result, index, 516 UseCompressedOops ? Address::times_4 : Address::times_ptr, 517 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp); 518 } 519 520 // load cpool->resolved_klass_at(index) 521 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool, 522 Register index, Register klass) { 523 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool))); 524 Register resolved_klasses = cpool; 525 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes())); 526 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes())); 527 } 528 529 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a 530 // subtype of super_klass. 531 // 532 // Args: 533 // rax: superklass 534 // Rsub_klass: subklass 535 // 536 // Kills: 537 // rcx, rdi 538 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, 539 Label& ok_is_subtype) { 540 assert(Rsub_klass != rax, "rax holds superklass"); 541 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");) 542 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");) 543 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); 544 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); 545 546 // Profile the not-null value's klass. 547 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 548 549 // Do the check. 550 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 551 552 // Profile the failure of the check. 553 profile_typecheck_failed(rcx); // blows rcx 554 } 555 556 557 #ifndef _LP64 558 void InterpreterMacroAssembler::f2ieee() { 559 if (IEEEPrecision) { 560 fstp_s(Address(rsp, 0)); 561 fld_s(Address(rsp, 0)); 562 } 563 } 564 565 566 void InterpreterMacroAssembler::d2ieee() { 567 if (IEEEPrecision) { 568 fstp_d(Address(rsp, 0)); 569 fld_d(Address(rsp, 0)); 570 } 571 } 572 #endif // _LP64 573 574 // Java Expression Stack 575 576 void InterpreterMacroAssembler::pop_ptr(Register r) { 577 pop(r); 578 } 579 580 void InterpreterMacroAssembler::push_ptr(Register r) { 581 push(r); 582 } 583 584 void InterpreterMacroAssembler::push_i(Register r) { 585 push(r); 586 } 587 588 void InterpreterMacroAssembler::push_f(XMMRegister r) { 589 subptr(rsp, wordSize); 590 movflt(Address(rsp, 0), r); 591 } 592 593 void InterpreterMacroAssembler::pop_f(XMMRegister r) { 594 movflt(r, Address(rsp, 0)); 595 addptr(rsp, wordSize); 596 } 597 598 void InterpreterMacroAssembler::push_d(XMMRegister r) { 599 subptr(rsp, 2 * wordSize); 600 movdbl(Address(rsp, 0), r); 601 } 602 603 void InterpreterMacroAssembler::pop_d(XMMRegister r) { 604 movdbl(r, Address(rsp, 0)); 605 addptr(rsp, 2 * Interpreter::stackElementSize); 606 } 607 608 #ifdef _LP64 609 void InterpreterMacroAssembler::pop_i(Register r) { 610 // XXX can't use pop currently, upper half non clean 611 movl(r, Address(rsp, 0)); 612 addptr(rsp, wordSize); 613 } 614 615 void InterpreterMacroAssembler::pop_l(Register r) { 616 movq(r, Address(rsp, 0)); 617 addptr(rsp, 2 * Interpreter::stackElementSize); 618 } 619 620 void InterpreterMacroAssembler::push_l(Register r) { 621 subptr(rsp, 2 * wordSize); 622 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r ); 623 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD ); 624 } 625 626 void InterpreterMacroAssembler::pop(TosState state) { 627 switch (state) { 628 case atos: pop_ptr(); break; 629 case btos: 630 case ztos: 631 case ctos: 632 case stos: 633 case itos: pop_i(); break; 634 case ltos: pop_l(); break; 635 case ftos: pop_f(xmm0); break; 636 case dtos: pop_d(xmm0); break; 637 case vtos: /* nothing to do */ break; 638 default: ShouldNotReachHere(); 639 } 640 verify_oop(rax, state); 641 } 642 643 void InterpreterMacroAssembler::push(TosState state) { 644 verify_oop(rax, state); 645 switch (state) { 646 case atos: push_ptr(); break; 647 case btos: 648 case ztos: 649 case ctos: 650 case stos: 651 case itos: push_i(); break; 652 case ltos: push_l(); break; 653 case ftos: push_f(xmm0); break; 654 case dtos: push_d(xmm0); break; 655 case vtos: /* nothing to do */ break; 656 default : ShouldNotReachHere(); 657 } 658 } 659 #else 660 void InterpreterMacroAssembler::pop_i(Register r) { 661 pop(r); 662 } 663 664 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 665 pop(lo); 666 pop(hi); 667 } 668 669 void InterpreterMacroAssembler::pop_f() { 670 fld_s(Address(rsp, 0)); 671 addptr(rsp, 1 * wordSize); 672 } 673 674 void InterpreterMacroAssembler::pop_d() { 675 fld_d(Address(rsp, 0)); 676 addptr(rsp, 2 * wordSize); 677 } 678 679 680 void InterpreterMacroAssembler::pop(TosState state) { 681 switch (state) { 682 case atos: pop_ptr(rax); break; 683 case btos: // fall through 684 case ztos: // fall through 685 case ctos: // fall through 686 case stos: // fall through 687 case itos: pop_i(rax); break; 688 case ltos: pop_l(rax, rdx); break; 689 case ftos: 690 if (UseSSE >= 1) { 691 pop_f(xmm0); 692 } else { 693 pop_f(); 694 } 695 break; 696 case dtos: 697 if (UseSSE >= 2) { 698 pop_d(xmm0); 699 } else { 700 pop_d(); 701 } 702 break; 703 case vtos: /* nothing to do */ break; 704 default : ShouldNotReachHere(); 705 } 706 verify_oop(rax, state); 707 } 708 709 710 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 711 push(hi); 712 push(lo); 713 } 714 715 void InterpreterMacroAssembler::push_f() { 716 // Do not schedule for no AGI! Never write beyond rsp! 717 subptr(rsp, 1 * wordSize); 718 fstp_s(Address(rsp, 0)); 719 } 720 721 void InterpreterMacroAssembler::push_d() { 722 // Do not schedule for no AGI! Never write beyond rsp! 723 subptr(rsp, 2 * wordSize); 724 fstp_d(Address(rsp, 0)); 725 } 726 727 728 void InterpreterMacroAssembler::push(TosState state) { 729 verify_oop(rax, state); 730 switch (state) { 731 case atos: push_ptr(rax); break; 732 case btos: // fall through 733 case ztos: // fall through 734 case ctos: // fall through 735 case stos: // fall through 736 case itos: push_i(rax); break; 737 case ltos: push_l(rax, rdx); break; 738 case ftos: 739 if (UseSSE >= 1) { 740 push_f(xmm0); 741 } else { 742 push_f(); 743 } 744 break; 745 case dtos: 746 if (UseSSE >= 2) { 747 push_d(xmm0); 748 } else { 749 push_d(); 750 } 751 break; 752 case vtos: /* nothing to do */ break; 753 default : ShouldNotReachHere(); 754 } 755 } 756 #endif // _LP64 757 758 759 // Helpers for swap and dup 760 void InterpreterMacroAssembler::load_ptr(int n, Register val) { 761 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 762 } 763 764 void InterpreterMacroAssembler::store_ptr(int n, Register val) { 765 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 766 } 767 768 769 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 770 // set sender sp 771 lea(_bcp_register, Address(rsp, wordSize)); 772 // record last_sp 773 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register); 774 } 775 776 777 // Jump to from_interpreted entry of a call unless single stepping is possible 778 // in this thread in which case we must call the i2i entry 779 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 780 prepare_to_jump_from_interpreted(); 781 782 if (JvmtiExport::can_post_interpreter_events()) { 783 Label run_compiled_code; 784 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 785 // compiled code in threads for which the event is enabled. Check here for 786 // interp_only_mode if these events CAN be enabled. 787 // interp_only is an int, on little endian it is sufficient to test the byte only 788 // Is a cmpl faster? 789 LP64_ONLY(temp = r15_thread;) 790 NOT_LP64(get_thread(temp);) 791 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 792 jccb(Assembler::zero, run_compiled_code); 793 jmp(Address(method, Method::interpreter_entry_offset())); 794 bind(run_compiled_code); 795 } 796 797 jmp(Address(method, Method::from_interpreted_offset())); 798 } 799 800 // The following two routines provide a hook so that an implementation 801 // can schedule the dispatch in two parts. x86 does not do this. 802 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 803 // Nothing x86 specific to be done here 804 } 805 806 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 807 dispatch_next(state, step); 808 } 809 810 void InterpreterMacroAssembler::dispatch_base(TosState state, 811 address* table, 812 bool verifyoop, 813 bool generate_poll) { 814 verify_FPU(1, state); 815 if (VerifyActivationFrameSize) { 816 Label L; 817 mov(rcx, rbp); 818 subptr(rcx, rsp); 819 int32_t min_frame_size = 820 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * 821 wordSize; 822 cmpptr(rcx, (int32_t)min_frame_size); 823 jcc(Assembler::greaterEqual, L); 824 stop("broken stack frame"); 825 bind(L); 826 } 827 if (verifyoop) { 828 verify_oop(rax, state); 829 } 830 831 address* const safepoint_table = Interpreter::safept_table(state); 832 #ifdef _LP64 833 Label no_safepoint, dispatch; 834 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) { 835 NOT_PRODUCT(block_comment("Thread-local Safepoint poll")); 836 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 837 838 jccb(Assembler::zero, no_safepoint); 839 lea(rscratch1, ExternalAddress((address)safepoint_table)); 840 jmpb(dispatch); 841 } 842 843 bind(no_safepoint); 844 lea(rscratch1, ExternalAddress((address)table)); 845 bind(dispatch); 846 jmp(Address(rscratch1, rbx, Address::times_8)); 847 848 #else 849 Address index(noreg, rbx, Address::times_ptr); 850 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) { 851 NOT_PRODUCT(block_comment("Thread-local Safepoint poll")); 852 Label no_safepoint; 853 const Register thread = rcx; 854 get_thread(thread); 855 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 856 857 jccb(Assembler::zero, no_safepoint); 858 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index); 859 jump(dispatch_addr); 860 bind(no_safepoint); 861 } 862 863 { 864 ArrayAddress dispatch_addr(ExternalAddress((address)table), index); 865 jump(dispatch_addr); 866 } 867 #endif // _LP64 868 } 869 870 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) { 871 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll); 872 } 873 874 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 875 dispatch_base(state, Interpreter::normal_table(state)); 876 } 877 878 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 879 dispatch_base(state, Interpreter::normal_table(state), false); 880 } 881 882 883 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) { 884 // load next bytecode (load before advancing _bcp_register to prevent AGI) 885 load_unsigned_byte(rbx, Address(_bcp_register, step)); 886 // advance _bcp_register 887 increment(_bcp_register, step); 888 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll); 889 } 890 891 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 892 // load current bytecode 893 load_unsigned_byte(rbx, Address(_bcp_register, 0)); 894 dispatch_base(state, table); 895 } 896 897 void InterpreterMacroAssembler::narrow(Register result) { 898 899 // Get method->_constMethod->_result_type 900 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 901 movptr(rcx, Address(rcx, Method::const_offset())); 902 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset())); 903 904 Label done, notBool, notByte, notChar; 905 906 // common case first 907 cmpl(rcx, T_INT); 908 jcc(Assembler::equal, done); 909 910 // mask integer result to narrower return type. 911 cmpl(rcx, T_BOOLEAN); 912 jcc(Assembler::notEqual, notBool); 913 andl(result, 0x1); 914 jmp(done); 915 916 bind(notBool); 917 cmpl(rcx, T_BYTE); 918 jcc(Assembler::notEqual, notByte); 919 LP64_ONLY(movsbl(result, result);) 920 NOT_LP64(shll(result, 24);) // truncate upper 24 bits 921 NOT_LP64(sarl(result, 24);) // and sign-extend byte 922 jmp(done); 923 924 bind(notByte); 925 cmpl(rcx, T_CHAR); 926 jcc(Assembler::notEqual, notChar); 927 LP64_ONLY(movzwl(result, result);) 928 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits 929 jmp(done); 930 931 bind(notChar); 932 // cmpl(rcx, T_SHORT); // all that's left 933 // jcc(Assembler::notEqual, done); 934 LP64_ONLY(movswl(result, result);) 935 NOT_LP64(shll(result, 16);) // truncate upper 16 bits 936 NOT_LP64(sarl(result, 16);) // and sign-extend short 937 938 // Nothing to do for T_INT 939 bind(done); 940 } 941 942 // remove activation 943 // 944 // Unlock the receiver if this is a synchronized method. 945 // Unlock any Java monitors from syncronized blocks. 946 // Remove the activation from the stack. 947 // 948 // If there are locked Java monitors 949 // If throw_monitor_exception 950 // throws IllegalMonitorStateException 951 // Else if install_monitor_exception 952 // installs IllegalMonitorStateException 953 // Else 954 // no error processing 955 void InterpreterMacroAssembler::remove_activation( 956 TosState state, 957 Register ret_addr, 958 bool throw_monitor_exception, 959 bool install_monitor_exception, 960 bool notify_jvmdi, 961 bool load_values) { 962 // Note: Registers rdx xmm0 may be in use for the 963 // result check if synchronized method 964 Label unlocked, unlock, no_unlock; 965 966 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 967 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 968 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 969 // monitor pointers need different register 970 // because rdx may have the result in it 971 NOT_LP64(get_thread(rcx);) 972 973 // get the value of _do_not_unlock_if_synchronized into rdx 974 const Address do_not_unlock_if_synchronized(rthread, 975 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 976 movbool(rbx, do_not_unlock_if_synchronized); 977 movbool(do_not_unlock_if_synchronized, false); // reset the flag 978 979 // get method access flags 980 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 981 movl(rcx, Address(rcx, Method::access_flags_offset())); 982 testl(rcx, JVM_ACC_SYNCHRONIZED); 983 jcc(Assembler::zero, unlocked); 984 985 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 986 // is set. 987 testbool(rbx); 988 jcc(Assembler::notZero, no_unlock); 989 990 // unlock monitor 991 push(state); // save result 992 993 // BasicObjectLock will be first in list, since this is a 994 // synchronized method. However, need to check that the object has 995 // not been unlocked by an explicit monitorexit bytecode. 996 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * 997 wordSize - (int) sizeof(BasicObjectLock)); 998 // We use c_rarg1/rdx so that if we go slow path it will be the correct 999 // register for unlock_object to pass to VM directly 1000 lea(robj, monitor); // address of first monitor 1001 1002 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes())); 1003 testptr(rax, rax); 1004 jcc(Assembler::notZero, unlock); 1005 1006 pop(state); 1007 if (throw_monitor_exception) { 1008 // Entry already unlocked, need to throw exception 1009 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow 1010 call_VM(noreg, CAST_FROM_FN_PTR(address, 1011 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1012 should_not_reach_here(); 1013 } else { 1014 // Monitor already unlocked during a stack unroll. If requested, 1015 // install an illegal_monitor_state_exception. Continue with 1016 // stack unrolling. 1017 if (install_monitor_exception) { 1018 NOT_LP64(empty_FPU_stack();) 1019 call_VM(noreg, CAST_FROM_FN_PTR(address, 1020 InterpreterRuntime::new_illegal_monitor_state_exception)); 1021 } 1022 jmp(unlocked); 1023 } 1024 1025 bind(unlock); 1026 unlock_object(robj); 1027 pop(state); 1028 1029 // Check that for block-structured locking (i.e., that all locked 1030 // objects has been unlocked) 1031 bind(unlocked); 1032 1033 // rax, rdx: Might contain return value 1034 1035 // Check that all monitors are unlocked 1036 { 1037 Label loop, exception, entry, restart; 1038 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 1039 const Address monitor_block_top( 1040 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 1041 const Address monitor_block_bot( 1042 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 1043 1044 bind(restart); 1045 // We use c_rarg1 so that if we go slow path it will be the correct 1046 // register for unlock_object to pass to VM directly 1047 movptr(rmon, monitor_block_top); // points to current entry, starting 1048 // with top-most entry 1049 lea(rbx, monitor_block_bot); // points to word before bottom of 1050 // monitor block 1051 jmp(entry); 1052 1053 // Entry already locked, need to throw exception 1054 bind(exception); 1055 1056 if (throw_monitor_exception) { 1057 // Throw exception 1058 NOT_LP64(empty_FPU_stack();) 1059 MacroAssembler::call_VM(noreg, 1060 CAST_FROM_FN_PTR(address, InterpreterRuntime:: 1061 throw_illegal_monitor_state_exception)); 1062 should_not_reach_here(); 1063 } else { 1064 // Stack unrolling. Unlock object and install illegal_monitor_exception. 1065 // Unlock does not block, so don't have to worry about the frame. 1066 // We don't have to preserve c_rarg1 since we are going to throw an exception. 1067 1068 push(state); 1069 mov(robj, rmon); // nop if robj and rmon are the same 1070 unlock_object(robj); 1071 pop(state); 1072 1073 if (install_monitor_exception) { 1074 NOT_LP64(empty_FPU_stack();) 1075 call_VM(noreg, CAST_FROM_FN_PTR(address, 1076 InterpreterRuntime:: 1077 new_illegal_monitor_state_exception)); 1078 } 1079 1080 jmp(restart); 1081 } 1082 1083 bind(loop); 1084 // check if current entry is used 1085 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); 1086 jcc(Assembler::notEqual, exception); 1087 1088 addptr(rmon, entry_size); // otherwise advance to next entry 1089 bind(entry); 1090 cmpptr(rmon, rbx); // check if bottom reached 1091 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 1092 } 1093 1094 bind(no_unlock); 1095 1096 // jvmti support 1097 if (notify_jvmdi) { 1098 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 1099 } else { 1100 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 1101 } 1102 1103 if (StackReservedPages > 0) { 1104 movptr(rbx, 1105 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1106 // testing if reserved zone needs to be re-enabled 1107 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1108 Label no_reserved_zone_enabling; 1109 1110 NOT_LP64(get_thread(rthread);) 1111 1112 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled); 1113 jcc(Assembler::equal, no_reserved_zone_enabling); 1114 1115 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset())); 1116 jcc(Assembler::lessEqual, no_reserved_zone_enabling); 1117 1118 call_VM_leaf( 1119 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread); 1120 call_VM(noreg, CAST_FROM_FN_PTR(address, 1121 InterpreterRuntime::throw_delayed_StackOverflowError)); 1122 should_not_reach_here(); 1123 1124 bind(no_reserved_zone_enabling); 1125 } 1126 1127 if (ValueTypesBufferMaxMemory > 0) { 1128 // Code below is taking care of recycling TLVB memory, no safepoint should 1129 // occur between this point and the end of the remove_activation() method 1130 Label vtbuffer_slow, vtbuffer_done, no_buffered_value_returned; 1131 const Register thread1 = NOT_LP64(rcx) LP64_ONLY(r15_thread); 1132 const uintptr_t chunk_mask = VTBufferChunk::chunk_mask(); 1133 NOT_LP64(get_thread(thread1)); 1134 cmpptr(Address(thread1, JavaThread::return_buffered_value_offset()), (intptr_t)NULL_WORD); 1135 jcc(Assembler::equal, no_buffered_value_returned); 1136 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize)); 1137 call_VM_leaf(CAST_FROM_FN_PTR(address, 1138 InterpreterRuntime::return_value_step2), rax, rbx); 1139 NOT_LP64(get_thread(thread1)); 1140 get_vm_result(rax, thread1); 1141 jmp(vtbuffer_done); 1142 bind(no_buffered_value_returned); 1143 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize)); 1144 NOT_LP64(get_thread(thread1)); 1145 movptr(rcx, Address(thread1, JavaThread::vt_alloc_ptr_offset())); 1146 cmpptr(rbx, rcx); 1147 jcc(Assembler::equal, vtbuffer_done); 1148 andptr(rbx, chunk_mask); 1149 andptr(rcx, chunk_mask); 1150 cmpptr(rbx, rcx); 1151 jcc(Assembler::notEqual, vtbuffer_slow); 1152 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize)); 1153 movptr(Address(thread1, JavaThread::vt_alloc_ptr_offset()), rbx); 1154 jmp(vtbuffer_done); 1155 bind(vtbuffer_slow); 1156 push(state); 1157 movptr(rbx, Address(rbp, frame::interpreter_frame_vt_alloc_ptr_offset * wordSize)); 1158 call_VM_leaf(CAST_FROM_FN_PTR(address, 1159 InterpreterRuntime::recycle_vtbuffer), rbx); 1160 pop(state); 1161 bind(vtbuffer_done); 1162 } 1163 1164 // remove activation 1165 // get sender sp 1166 movptr(rbx, 1167 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1168 1169 if (load_values) { 1170 // We are returning a value type, load its fields into registers 1171 #ifndef _LP64 1172 super_call_VM_leaf(StubRoutines::load_value_type_fields_in_regs()); 1173 #else 1174 load_klass(rdi, rax); 1175 movptr(rdi, Address(rdi, ValueKlass::unpack_handler_offset())); 1176 1177 Label skip; 1178 testptr(rdi, rdi); 1179 jcc(Assembler::equal, skip); 1180 1181 // Load fields from a buffered value with a value class specific 1182 // handler 1183 call(rdi); 1184 1185 bind(skip); 1186 #endif 1187 // call above kills the value in rbx. Reload it. 1188 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1189 } 1190 leave(); // remove frame anchor 1191 pop(ret_addr); // get return address 1192 mov(rsp, rbx); // set sp to sender sp 1193 } 1194 1195 void InterpreterMacroAssembler::get_method_counters(Register method, 1196 Register mcs, Label& skip) { 1197 Label has_counters; 1198 movptr(mcs, Address(method, Method::method_counters_offset())); 1199 testptr(mcs, mcs); 1200 jcc(Assembler::notZero, has_counters); 1201 call_VM(noreg, CAST_FROM_FN_PTR(address, 1202 InterpreterRuntime::build_method_counters), method); 1203 movptr(mcs, Address(method,Method::method_counters_offset())); 1204 testptr(mcs, mcs); 1205 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory 1206 bind(has_counters); 1207 } 1208 1209 1210 // Lock object 1211 // 1212 // Args: 1213 // rdx, c_rarg1: BasicObjectLock to be used for locking 1214 // 1215 // Kills: 1216 // rax, rbx 1217 void InterpreterMacroAssembler::lock_object(Register lock_reg) { 1218 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1219 "The argument is only for looks. It must be c_rarg1"); 1220 1221 if (UseHeavyMonitors) { 1222 call_VM(noreg, 1223 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1224 lock_reg); 1225 } else { 1226 Label done; 1227 1228 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1229 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a 1230 // problematic case where tmp_reg = no_reg. 1231 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1232 1233 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 1234 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 1235 const int mark_offset = lock_offset + 1236 BasicLock::displaced_header_offset_in_bytes(); 1237 1238 Label slow_case; 1239 1240 // Load object pointer into obj_reg 1241 movptr(obj_reg, Address(lock_reg, obj_offset)); 1242 1243 if (UseBiasedLocking) { 1244 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case); 1245 } 1246 1247 // Load immediate 1 into swap_reg %rax 1248 movl(swap_reg, (int32_t)1); 1249 1250 // Load (object->mark() | 1) into swap_reg %rax 1251 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1252 if (EnableValhalla && !UseBiasedLocking) { 1253 // For slow path is_always_locked, using biased, which is never natural for !UseBiasLocking 1254 andptr(swap_reg, ~markOopDesc::biased_lock_bit_in_place); 1255 } 1256 1257 // Save (object->mark() | 1) into BasicLock's displaced header 1258 movptr(Address(lock_reg, mark_offset), swap_reg); 1259 1260 assert(lock_offset == 0, 1261 "displaced header must be first word in BasicObjectLock"); 1262 1263 if (os::is_MP()) lock(); 1264 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1265 if (PrintBiasedLockingStatistics) { 1266 cond_inc32(Assembler::zero, 1267 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1268 } 1269 jcc(Assembler::zero, done); 1270 1271 const int zero_bits = LP64_ONLY(7) NOT_LP64(3); 1272 1273 // Test if the oopMark is an obvious stack pointer, i.e., 1274 // 1) (mark & zero_bits) == 0, and 1275 // 2) rsp <= mark < mark + os::pagesize() 1276 // 1277 // These 3 tests can be done by evaluating the following 1278 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())), 1279 // assuming both stack pointer and pagesize have their 1280 // least significant bits clear. 1281 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg 1282 subptr(swap_reg, rsp); 1283 andptr(swap_reg, zero_bits - os::vm_page_size()); 1284 1285 // Save the test result, for recursive case, the result is zero 1286 movptr(Address(lock_reg, mark_offset), swap_reg); 1287 1288 if (PrintBiasedLockingStatistics) { 1289 cond_inc32(Assembler::zero, 1290 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1291 } 1292 jcc(Assembler::zero, done); 1293 1294 bind(slow_case); 1295 1296 // Call the runtime routine for slow case 1297 call_VM(noreg, 1298 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1299 lock_reg); 1300 1301 bind(done); 1302 } 1303 } 1304 1305 1306 // Unlocks an object. Used in monitorexit bytecode and 1307 // remove_activation. Throws an IllegalMonitorException if object is 1308 // not locked by current thread. 1309 // 1310 // Args: 1311 // rdx, c_rarg1: BasicObjectLock for lock 1312 // 1313 // Kills: 1314 // rax 1315 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) 1316 // rscratch1 (scratch reg) 1317 // rax, rbx, rcx, rdx 1318 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 1319 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1320 "The argument is only for looks. It must be c_rarg1"); 1321 1322 if (UseHeavyMonitors) { 1323 call_VM(noreg, 1324 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1325 lock_reg); 1326 } else { 1327 Label done; 1328 1329 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1330 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark 1331 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1332 1333 save_bcp(); // Save in case of exception 1334 1335 // Convert from BasicObjectLock structure to object and BasicLock 1336 // structure Store the BasicLock address into %rax 1337 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 1338 1339 // Load oop into obj_reg(%c_rarg3) 1340 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); 1341 1342 // Free entry 1343 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); 1344 1345 if (UseBiasedLocking) { 1346 biased_locking_exit(obj_reg, header_reg, done); 1347 } 1348 1349 // Load the old header from BasicLock structure 1350 movptr(header_reg, Address(swap_reg, 1351 BasicLock::displaced_header_offset_in_bytes())); 1352 1353 // Test for recursion 1354 testptr(header_reg, header_reg); 1355 1356 // zero for recursive case 1357 jcc(Assembler::zero, done); 1358 1359 // Atomic swap back the old header 1360 if (os::is_MP()) lock(); 1361 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1362 1363 // zero for simple unlock of a stack-lock case 1364 jcc(Assembler::zero, done); 1365 1366 // Call the runtime routine for slow case. 1367 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), 1368 obj_reg); // restore obj 1369 call_VM(noreg, 1370 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1371 lock_reg); 1372 1373 bind(done); 1374 1375 restore_bcp(); 1376 } 1377 } 1378 1379 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, 1380 Label& zero_continue) { 1381 assert(ProfileInterpreter, "must be profiling interpreter"); 1382 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize)); 1383 testptr(mdp, mdp); 1384 jcc(Assembler::zero, zero_continue); 1385 } 1386 1387 1388 // Set the method data pointer for the current bcp. 1389 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1390 assert(ProfileInterpreter, "must be profiling interpreter"); 1391 Label set_mdp; 1392 push(rax); 1393 push(rbx); 1394 1395 get_method(rbx); 1396 // Test MDO to avoid the call if it is NULL. 1397 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 1398 testptr(rax, rax); 1399 jcc(Assembler::zero, set_mdp); 1400 // rbx: method 1401 // _bcp_register: bcp 1402 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register); 1403 // rax: mdi 1404 // mdo is guaranteed to be non-zero here, we checked for it before the call. 1405 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 1406 addptr(rbx, in_bytes(MethodData::data_offset())); 1407 addptr(rax, rbx); 1408 bind(set_mdp); 1409 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax); 1410 pop(rbx); 1411 pop(rax); 1412 } 1413 1414 void InterpreterMacroAssembler::verify_method_data_pointer() { 1415 assert(ProfileInterpreter, "must be profiling interpreter"); 1416 #ifdef ASSERT 1417 Label verify_continue; 1418 push(rax); 1419 push(rbx); 1420 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 1421 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 1422 push(arg3_reg); 1423 push(arg2_reg); 1424 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue 1425 get_method(rbx); 1426 1427 // If the mdp is valid, it will point to a DataLayout header which is 1428 // consistent with the bcp. The converse is highly probable also. 1429 load_unsigned_short(arg2_reg, 1430 Address(arg3_reg, in_bytes(DataLayout::bci_offset()))); 1431 addptr(arg2_reg, Address(rbx, Method::const_offset())); 1432 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset())); 1433 cmpptr(arg2_reg, _bcp_register); 1434 jcc(Assembler::equal, verify_continue); 1435 // rbx: method 1436 // _bcp_register: bcp 1437 // c_rarg3: mdp 1438 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), 1439 rbx, _bcp_register, arg3_reg); 1440 bind(verify_continue); 1441 pop(arg2_reg); 1442 pop(arg3_reg); 1443 pop(rbx); 1444 pop(rax); 1445 #endif // ASSERT 1446 } 1447 1448 1449 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, 1450 int constant, 1451 Register value) { 1452 assert(ProfileInterpreter, "must be profiling interpreter"); 1453 Address data(mdp_in, constant); 1454 movptr(data, value); 1455 } 1456 1457 1458 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1459 int constant, 1460 bool decrement) { 1461 // Counter address 1462 Address data(mdp_in, constant); 1463 1464 increment_mdp_data_at(data, decrement); 1465 } 1466 1467 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 1468 bool decrement) { 1469 assert(ProfileInterpreter, "must be profiling interpreter"); 1470 // %%% this does 64bit counters at best it is wasting space 1471 // at worst it is a rare bug when counters overflow 1472 1473 if (decrement) { 1474 // Decrement the register. Set condition codes. 1475 addptr(data, (int32_t) -DataLayout::counter_increment); 1476 // If the decrement causes the counter to overflow, stay negative 1477 Label L; 1478 jcc(Assembler::negative, L); 1479 addptr(data, (int32_t) DataLayout::counter_increment); 1480 bind(L); 1481 } else { 1482 assert(DataLayout::counter_increment == 1, 1483 "flow-free idiom only works with 1"); 1484 // Increment the register. Set carry flag. 1485 addptr(data, DataLayout::counter_increment); 1486 // If the increment causes the counter to overflow, pull back by 1. 1487 sbbptr(data, (int32_t)0); 1488 } 1489 } 1490 1491 1492 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1493 Register reg, 1494 int constant, 1495 bool decrement) { 1496 Address data(mdp_in, reg, Address::times_1, constant); 1497 1498 increment_mdp_data_at(data, decrement); 1499 } 1500 1501 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, 1502 int flag_byte_constant) { 1503 assert(ProfileInterpreter, "must be profiling interpreter"); 1504 int header_offset = in_bytes(DataLayout::flags_offset()); 1505 int header_bits = flag_byte_constant; 1506 // Set the flag 1507 orb(Address(mdp_in, header_offset), header_bits); 1508 } 1509 1510 1511 1512 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 1513 int offset, 1514 Register value, 1515 Register test_value_out, 1516 Label& not_equal_continue) { 1517 assert(ProfileInterpreter, "must be profiling interpreter"); 1518 if (test_value_out == noreg) { 1519 cmpptr(value, Address(mdp_in, offset)); 1520 } else { 1521 // Put the test value into a register, so caller can use it: 1522 movptr(test_value_out, Address(mdp_in, offset)); 1523 cmpptr(test_value_out, value); 1524 } 1525 jcc(Assembler::notEqual, not_equal_continue); 1526 } 1527 1528 1529 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1530 int offset_of_disp) { 1531 assert(ProfileInterpreter, "must be profiling interpreter"); 1532 Address disp_address(mdp_in, offset_of_disp); 1533 addptr(mdp_in, disp_address); 1534 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1535 } 1536 1537 1538 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1539 Register reg, 1540 int offset_of_disp) { 1541 assert(ProfileInterpreter, "must be profiling interpreter"); 1542 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 1543 addptr(mdp_in, disp_address); 1544 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1545 } 1546 1547 1548 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, 1549 int constant) { 1550 assert(ProfileInterpreter, "must be profiling interpreter"); 1551 addptr(mdp_in, constant); 1552 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1553 } 1554 1555 1556 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 1557 assert(ProfileInterpreter, "must be profiling interpreter"); 1558 push(return_bci); // save/restore across call_VM 1559 call_VM(noreg, 1560 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), 1561 return_bci); 1562 pop(return_bci); 1563 } 1564 1565 1566 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, 1567 Register bumped_count) { 1568 if (ProfileInterpreter) { 1569 Label profile_continue; 1570 1571 // If no method data exists, go to profile_continue. 1572 // Otherwise, assign to mdp 1573 test_method_data_pointer(mdp, profile_continue); 1574 1575 // We are taking a branch. Increment the taken count. 1576 // We inline increment_mdp_data_at to return bumped_count in a register 1577 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1578 Address data(mdp, in_bytes(JumpData::taken_offset())); 1579 movptr(bumped_count, data); 1580 assert(DataLayout::counter_increment == 1, 1581 "flow-free idiom only works with 1"); 1582 addptr(bumped_count, DataLayout::counter_increment); 1583 sbbptr(bumped_count, 0); 1584 movptr(data, bumped_count); // Store back out 1585 1586 // The method data pointer needs to be updated to reflect the new target. 1587 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1588 bind(profile_continue); 1589 } 1590 } 1591 1592 1593 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1594 if (ProfileInterpreter) { 1595 Label profile_continue; 1596 1597 // If no method data exists, go to profile_continue. 1598 test_method_data_pointer(mdp, profile_continue); 1599 1600 // We are taking a branch. Increment the not taken count. 1601 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1602 1603 // The method data pointer needs to be updated to correspond to 1604 // the next bytecode 1605 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1606 bind(profile_continue); 1607 } 1608 } 1609 1610 void InterpreterMacroAssembler::profile_call(Register mdp) { 1611 if (ProfileInterpreter) { 1612 Label profile_continue; 1613 1614 // If no method data exists, go to profile_continue. 1615 test_method_data_pointer(mdp, profile_continue); 1616 1617 // We are making a call. Increment the count. 1618 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1619 1620 // The method data pointer needs to be updated to reflect the new target. 1621 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1622 bind(profile_continue); 1623 } 1624 } 1625 1626 1627 void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1628 if (ProfileInterpreter) { 1629 Label profile_continue; 1630 1631 // If no method data exists, go to profile_continue. 1632 test_method_data_pointer(mdp, profile_continue); 1633 1634 // We are making a call. Increment the count. 1635 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1636 1637 // The method data pointer needs to be updated to reflect the new target. 1638 update_mdp_by_constant(mdp, 1639 in_bytes(VirtualCallData:: 1640 virtual_call_data_size())); 1641 bind(profile_continue); 1642 } 1643 } 1644 1645 1646 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, 1647 Register mdp, 1648 Register reg2, 1649 bool receiver_can_be_null) { 1650 if (ProfileInterpreter) { 1651 Label profile_continue; 1652 1653 // If no method data exists, go to profile_continue. 1654 test_method_data_pointer(mdp, profile_continue); 1655 1656 Label skip_receiver_profile; 1657 if (receiver_can_be_null) { 1658 Label not_null; 1659 testptr(receiver, receiver); 1660 jccb(Assembler::notZero, not_null); 1661 // We are making a call. Increment the count for null receiver. 1662 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1663 jmp(skip_receiver_profile); 1664 bind(not_null); 1665 } 1666 1667 // Record the receiver type. 1668 record_klass_in_profile(receiver, mdp, reg2, true); 1669 bind(skip_receiver_profile); 1670 1671 // The method data pointer needs to be updated to reflect the new target. 1672 #if INCLUDE_JVMCI 1673 if (MethodProfileWidth == 0) { 1674 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1675 } 1676 #else // INCLUDE_JVMCI 1677 update_mdp_by_constant(mdp, 1678 in_bytes(VirtualCallData:: 1679 virtual_call_data_size())); 1680 #endif // INCLUDE_JVMCI 1681 bind(profile_continue); 1682 } 1683 } 1684 1685 #if INCLUDE_JVMCI 1686 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) { 1687 assert_different_registers(method, mdp, reg2); 1688 if (ProfileInterpreter && MethodProfileWidth > 0) { 1689 Label profile_continue; 1690 1691 // If no method data exists, go to profile_continue. 1692 test_method_data_pointer(mdp, profile_continue); 1693 1694 Label done; 1695 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth, 1696 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset())); 1697 bind(done); 1698 1699 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1700 bind(profile_continue); 1701 } 1702 } 1703 #endif // INCLUDE_JVMCI 1704 1705 // This routine creates a state machine for updating the multi-row 1706 // type profile at a virtual call site (or other type-sensitive bytecode). 1707 // The machine visits each row (of receiver/count) until the receiver type 1708 // is found, or until it runs out of rows. At the same time, it remembers 1709 // the location of the first empty row. (An empty row records null for its 1710 // receiver, and can be allocated for a newly-observed receiver type.) 1711 // Because there are two degrees of freedom in the state, a simple linear 1712 // search will not work; it must be a decision tree. Hence this helper 1713 // function is recursive, to generate the required tree structured code. 1714 // It's the interpreter, so we are trading off code space for speed. 1715 // See below for example code. 1716 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1717 Register receiver, Register mdp, 1718 Register reg2, int start_row, 1719 Label& done, bool is_virtual_call) { 1720 if (TypeProfileWidth == 0) { 1721 if (is_virtual_call) { 1722 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1723 } 1724 #if INCLUDE_JVMCI 1725 else if (EnableJVMCI) { 1726 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset())); 1727 } 1728 #endif // INCLUDE_JVMCI 1729 } else { 1730 int non_profiled_offset = -1; 1731 if (is_virtual_call) { 1732 non_profiled_offset = in_bytes(CounterData::count_offset()); 1733 } 1734 #if INCLUDE_JVMCI 1735 else if (EnableJVMCI) { 1736 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()); 1737 } 1738 #endif // INCLUDE_JVMCI 1739 1740 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth, 1741 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset); 1742 } 1743 } 1744 1745 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, 1746 Register reg2, int start_row, Label& done, int total_rows, 1747 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn, 1748 int non_profiled_offset) { 1749 int last_row = total_rows - 1; 1750 assert(start_row <= last_row, "must be work left to do"); 1751 // Test this row for both the item and for null. 1752 // Take any of three different outcomes: 1753 // 1. found item => increment count and goto done 1754 // 2. found null => keep looking for case 1, maybe allocate this cell 1755 // 3. found something else => keep looking for cases 1 and 2 1756 // Case 3 is handled by a recursive call. 1757 for (int row = start_row; row <= last_row; row++) { 1758 Label next_test; 1759 bool test_for_null_also = (row == start_row); 1760 1761 // See if the item is item[n]. 1762 int item_offset = in_bytes(item_offset_fn(row)); 1763 test_mdp_data_at(mdp, item_offset, item, 1764 (test_for_null_also ? reg2 : noreg), 1765 next_test); 1766 // (Reg2 now contains the item from the CallData.) 1767 1768 // The item is item[n]. Increment count[n]. 1769 int count_offset = in_bytes(item_count_offset_fn(row)); 1770 increment_mdp_data_at(mdp, count_offset); 1771 jmp(done); 1772 bind(next_test); 1773 1774 if (test_for_null_also) { 1775 Label found_null; 1776 // Failed the equality check on item[n]... Test for null. 1777 testptr(reg2, reg2); 1778 if (start_row == last_row) { 1779 // The only thing left to do is handle the null case. 1780 if (non_profiled_offset >= 0) { 1781 jccb(Assembler::zero, found_null); 1782 // Item did not match any saved item and there is no empty row for it. 1783 // Increment total counter to indicate polymorphic case. 1784 increment_mdp_data_at(mdp, non_profiled_offset); 1785 jmp(done); 1786 bind(found_null); 1787 } else { 1788 jcc(Assembler::notZero, done); 1789 } 1790 break; 1791 } 1792 // Since null is rare, make it be the branch-taken case. 1793 jcc(Assembler::zero, found_null); 1794 1795 // Put all the "Case 3" tests here. 1796 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows, 1797 item_offset_fn, item_count_offset_fn, non_profiled_offset); 1798 1799 // Found a null. Keep searching for a matching item, 1800 // but remember that this is an empty (unused) slot. 1801 bind(found_null); 1802 } 1803 } 1804 1805 // In the fall-through case, we found no matching item, but we 1806 // observed the item[start_row] is NULL. 1807 1808 // Fill in the item field and increment the count. 1809 int item_offset = in_bytes(item_offset_fn(start_row)); 1810 set_mdp_data_at(mdp, item_offset, item); 1811 int count_offset = in_bytes(item_count_offset_fn(start_row)); 1812 movl(reg2, DataLayout::counter_increment); 1813 set_mdp_data_at(mdp, count_offset, reg2); 1814 if (start_row > 0) { 1815 jmp(done); 1816 } 1817 } 1818 1819 // Example state machine code for three profile rows: 1820 // // main copy of decision tree, rooted at row[1] 1821 // if (row[0].rec == rec) { row[0].incr(); goto done; } 1822 // if (row[0].rec != NULL) { 1823 // // inner copy of decision tree, rooted at row[1] 1824 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1825 // if (row[1].rec != NULL) { 1826 // // degenerate decision tree, rooted at row[2] 1827 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1828 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow 1829 // row[2].init(rec); goto done; 1830 // } else { 1831 // // remember row[1] is empty 1832 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1833 // row[1].init(rec); goto done; 1834 // } 1835 // } else { 1836 // // remember row[0] is empty 1837 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1838 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1839 // row[0].init(rec); goto done; 1840 // } 1841 // done: 1842 1843 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1844 Register mdp, Register reg2, 1845 bool is_virtual_call) { 1846 assert(ProfileInterpreter, "must be profiling"); 1847 Label done; 1848 1849 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1850 1851 bind (done); 1852 } 1853 1854 void InterpreterMacroAssembler::profile_ret(Register return_bci, 1855 Register mdp) { 1856 if (ProfileInterpreter) { 1857 Label profile_continue; 1858 uint row; 1859 1860 // If no method data exists, go to profile_continue. 1861 test_method_data_pointer(mdp, profile_continue); 1862 1863 // Update the total ret count. 1864 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1865 1866 for (row = 0; row < RetData::row_limit(); row++) { 1867 Label next_test; 1868 1869 // See if return_bci is equal to bci[n]: 1870 test_mdp_data_at(mdp, 1871 in_bytes(RetData::bci_offset(row)), 1872 return_bci, noreg, 1873 next_test); 1874 1875 // return_bci is equal to bci[n]. Increment the count. 1876 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1877 1878 // The method data pointer needs to be updated to reflect the new target. 1879 update_mdp_by_offset(mdp, 1880 in_bytes(RetData::bci_displacement_offset(row))); 1881 jmp(profile_continue); 1882 bind(next_test); 1883 } 1884 1885 update_mdp_for_ret(return_bci); 1886 1887 bind(profile_continue); 1888 } 1889 } 1890 1891 1892 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1893 if (ProfileInterpreter) { 1894 Label profile_continue; 1895 1896 // If no method data exists, go to profile_continue. 1897 test_method_data_pointer(mdp, profile_continue); 1898 1899 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1900 1901 // The method data pointer needs to be updated. 1902 int mdp_delta = in_bytes(BitData::bit_data_size()); 1903 if (TypeProfileCasts) { 1904 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1905 } 1906 update_mdp_by_constant(mdp, mdp_delta); 1907 1908 bind(profile_continue); 1909 } 1910 } 1911 1912 1913 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1914 if (ProfileInterpreter && TypeProfileCasts) { 1915 Label profile_continue; 1916 1917 // If no method data exists, go to profile_continue. 1918 test_method_data_pointer(mdp, profile_continue); 1919 1920 int count_offset = in_bytes(CounterData::count_offset()); 1921 // Back up the address, since we have already bumped the mdp. 1922 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1923 1924 // *Decrement* the counter. We expect to see zero or small negatives. 1925 increment_mdp_data_at(mdp, count_offset, true); 1926 1927 bind (profile_continue); 1928 } 1929 } 1930 1931 1932 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { 1933 if (ProfileInterpreter) { 1934 Label profile_continue; 1935 1936 // If no method data exists, go to profile_continue. 1937 test_method_data_pointer(mdp, profile_continue); 1938 1939 // The method data pointer needs to be updated. 1940 int mdp_delta = in_bytes(BitData::bit_data_size()); 1941 if (TypeProfileCasts) { 1942 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1943 1944 // Record the object type. 1945 record_klass_in_profile(klass, mdp, reg2, false); 1946 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");) 1947 NOT_LP64(restore_locals();) // Restore EDI 1948 } 1949 update_mdp_by_constant(mdp, mdp_delta); 1950 1951 bind(profile_continue); 1952 } 1953 } 1954 1955 1956 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1957 if (ProfileInterpreter) { 1958 Label profile_continue; 1959 1960 // If no method data exists, go to profile_continue. 1961 test_method_data_pointer(mdp, profile_continue); 1962 1963 // Update the default case count 1964 increment_mdp_data_at(mdp, 1965 in_bytes(MultiBranchData::default_count_offset())); 1966 1967 // The method data pointer needs to be updated. 1968 update_mdp_by_offset(mdp, 1969 in_bytes(MultiBranchData:: 1970 default_displacement_offset())); 1971 1972 bind(profile_continue); 1973 } 1974 } 1975 1976 1977 void InterpreterMacroAssembler::profile_switch_case(Register index, 1978 Register mdp, 1979 Register reg2) { 1980 if (ProfileInterpreter) { 1981 Label profile_continue; 1982 1983 // If no method data exists, go to profile_continue. 1984 test_method_data_pointer(mdp, profile_continue); 1985 1986 // Build the base (index * per_case_size_in_bytes()) + 1987 // case_array_offset_in_bytes() 1988 movl(reg2, in_bytes(MultiBranchData::per_case_size())); 1989 imulptr(index, reg2); // XXX l ? 1990 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? 1991 1992 // Update the case count 1993 increment_mdp_data_at(mdp, 1994 index, 1995 in_bytes(MultiBranchData::relative_count_offset())); 1996 1997 // The method data pointer needs to be updated. 1998 update_mdp_by_offset(mdp, 1999 index, 2000 in_bytes(MultiBranchData:: 2001 relative_displacement_offset())); 2002 2003 bind(profile_continue); 2004 } 2005 } 2006 2007 2008 2009 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 2010 if (state == atos) { 2011 MacroAssembler::verify_oop(reg); 2012 } 2013 } 2014 2015 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 2016 #ifndef _LP64 2017 if ((state == ftos && UseSSE < 1) || 2018 (state == dtos && UseSSE < 2)) { 2019 MacroAssembler::verify_FPU(stack_depth); 2020 } 2021 #endif 2022 } 2023 2024 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. 2025 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 2026 int increment, Address mask, 2027 Register scratch, bool preloaded, 2028 Condition cond, Label* where) { 2029 if (!preloaded) { 2030 movl(scratch, counter_addr); 2031 } 2032 incrementl(scratch, increment); 2033 movl(counter_addr, scratch); 2034 andl(scratch, mask); 2035 if (where != NULL) { 2036 jcc(cond, *where); 2037 } 2038 } 2039 2040 void InterpreterMacroAssembler::notify_method_entry() { 2041 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 2042 // track stack depth. If it is possible to enter interp_only_mode we add 2043 // the code to check if the event should be sent. 2044 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 2045 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 2046 if (JvmtiExport::can_post_interpreter_events()) { 2047 Label L; 2048 NOT_LP64(get_thread(rthread);) 2049 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 2050 testl(rdx, rdx); 2051 jcc(Assembler::zero, L); 2052 call_VM(noreg, CAST_FROM_FN_PTR(address, 2053 InterpreterRuntime::post_method_entry)); 2054 bind(L); 2055 } 2056 2057 { 2058 SkipIfEqual skip(this, &DTraceMethodProbes, false); 2059 NOT_LP64(get_thread(rthread);) 2060 get_method(rarg); 2061 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), 2062 rthread, rarg); 2063 } 2064 2065 // RedefineClasses() tracing support for obsolete method entry 2066 if (log_is_enabled(Trace, redefine, class, obsolete)) { 2067 NOT_LP64(get_thread(rthread);) 2068 get_method(rarg); 2069 call_VM_leaf( 2070 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 2071 rthread, rarg); 2072 } 2073 } 2074 2075 2076 void InterpreterMacroAssembler::notify_method_exit( 2077 TosState state, NotifyMethodExitMode mode) { 2078 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 2079 // track stack depth. If it is possible to enter interp_only_mode we add 2080 // the code to check if the event should be sent. 2081 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 2082 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 2083 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 2084 Label L; 2085 // Note: frame::interpreter_frame_result has a dependency on how the 2086 // method result is saved across the call to post_method_exit. If this 2087 // is changed then the interpreter_frame_result implementation will 2088 // need to be updated too. 2089 2090 // template interpreter will leave the result on the top of the stack. 2091 push(state); 2092 NOT_LP64(get_thread(rthread);) 2093 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 2094 testl(rdx, rdx); 2095 jcc(Assembler::zero, L); 2096 call_VM(noreg, 2097 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 2098 bind(L); 2099 pop(state); 2100 } 2101 2102 { 2103 SkipIfEqual skip(this, &DTraceMethodProbes, false); 2104 push(state); 2105 NOT_LP64(get_thread(rthread);) 2106 get_method(rarg); 2107 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 2108 rthread, rarg); 2109 pop(state); 2110 } 2111 }