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 "oops/arrayOop.hpp" 31 #include "oops/markWord.hpp" 32 #include "oops/methodData.hpp" 33 #include "oops/method.hpp" 34 #include "oops/valueKlass.hpp" 35 #include "prims/jvmtiExport.hpp" 36 #include "prims/jvmtiThreadState.hpp" 37 #include "runtime/basicLock.hpp" 38 #include "runtime/biasedLocking.hpp" 39 #include "runtime/frame.inline.hpp" 40 #include "runtime/safepointMechanism.hpp" 41 #include "runtime/sharedRuntime.hpp" 42 #include "runtime/thread.inline.hpp" 43 44 // Implementation of InterpreterMacroAssembler 45 46 void InterpreterMacroAssembler::jump_to_entry(address entry) { 47 assert(entry, "Entry must have been generated by now"); 48 jump(RuntimeAddress(entry)); 49 } 50 51 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) { 52 Label update, next, none; 53 54 verify_oop(obj); 55 56 testptr(obj, obj); 57 jccb(Assembler::notZero, update); 58 orptr(mdo_addr, TypeEntries::null_seen); 59 jmpb(next); 60 61 bind(update); 62 load_klass(obj, obj); 63 64 xorptr(obj, mdo_addr); 65 testptr(obj, TypeEntries::type_klass_mask); 66 jccb(Assembler::zero, next); // klass seen before, nothing to 67 // do. The unknown bit may have been 68 // set already but no need to check. 69 70 testptr(obj, TypeEntries::type_unknown); 71 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 72 73 cmpptr(mdo_addr, 0); 74 jccb(Assembler::equal, none); 75 cmpptr(mdo_addr, TypeEntries::null_seen); 76 jccb(Assembler::equal, none); 77 // There is a chance that the checks above (re-reading profiling 78 // data from memory) fail if another thread has just set the 79 // profiling to this obj's klass 80 xorptr(obj, mdo_addr); 81 testptr(obj, TypeEntries::type_klass_mask); 82 jccb(Assembler::zero, next); 83 84 // different than before. Cannot keep accurate profile. 85 orptr(mdo_addr, TypeEntries::type_unknown); 86 jmpb(next); 87 88 bind(none); 89 // first time here. Set profile type. 90 movptr(mdo_addr, obj); 91 92 bind(next); 93 } 94 95 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) { 96 if (!ProfileInterpreter) { 97 return; 98 } 99 100 if (MethodData::profile_arguments() || MethodData::profile_return()) { 101 Label profile_continue; 102 103 test_method_data_pointer(mdp, profile_continue); 104 105 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size()); 106 107 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag); 108 jcc(Assembler::notEqual, profile_continue); 109 110 if (MethodData::profile_arguments()) { 111 Label done; 112 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset()); 113 addptr(mdp, off_to_args); 114 115 for (int i = 0; i < TypeProfileArgsLimit; i++) { 116 if (i > 0 || MethodData::profile_return()) { 117 // If return value type is profiled we may have no argument to profile 118 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 119 subl(tmp, i*TypeStackSlotEntries::per_arg_count()); 120 cmpl(tmp, TypeStackSlotEntries::per_arg_count()); 121 jcc(Assembler::less, done); 122 } 123 movptr(tmp, Address(callee, Method::const_offset())); 124 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset())); 125 // stack offset o (zero based) from the start of the argument 126 // list, for n arguments translates into offset n - o - 1 from 127 // the end of the argument list 128 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args)); 129 subl(tmp, 1); 130 Address arg_addr = argument_address(tmp); 131 movptr(tmp, arg_addr); 132 133 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args); 134 profile_obj_type(tmp, mdo_arg_addr); 135 136 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size()); 137 addptr(mdp, to_add); 138 off_to_args += to_add; 139 } 140 141 if (MethodData::profile_return()) { 142 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 143 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count()); 144 } 145 146 bind(done); 147 148 if (MethodData::profile_return()) { 149 // We're right after the type profile for the last 150 // argument. tmp is the number of cells left in the 151 // CallTypeData/VirtualCallTypeData to reach its end. Non null 152 // if there's a return to profile. 153 assert(SingleTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type"); 154 shll(tmp, exact_log2(DataLayout::cell_size)); 155 addptr(mdp, tmp); 156 } 157 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp); 158 } else { 159 assert(MethodData::profile_return(), "either profile call args or call ret"); 160 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size())); 161 } 162 163 // mdp points right after the end of the 164 // CallTypeData/VirtualCallTypeData, right after the cells for the 165 // return value type if there's one 166 167 bind(profile_continue); 168 } 169 } 170 171 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) { 172 assert_different_registers(mdp, ret, tmp, _bcp_register); 173 if (ProfileInterpreter && MethodData::profile_return()) { 174 Label profile_continue; 175 176 test_method_data_pointer(mdp, profile_continue); 177 178 if (MethodData::profile_return_jsr292_only()) { 179 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2"); 180 181 // If we don't profile all invoke bytecodes we must make sure 182 // it's a bytecode we indeed profile. We can't go back to the 183 // begining of the ProfileData we intend to update to check its 184 // type because we're right after it and we don't known its 185 // length 186 Label do_profile; 187 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic); 188 jcc(Assembler::equal, do_profile); 189 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle); 190 jcc(Assembler::equal, do_profile); 191 get_method(tmp); 192 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm); 193 jcc(Assembler::notEqual, profile_continue); 194 195 bind(do_profile); 196 } 197 198 Address mdo_ret_addr(mdp, -in_bytes(SingleTypeEntry::size())); 199 mov(tmp, ret); 200 profile_obj_type(tmp, mdo_ret_addr); 201 202 bind(profile_continue); 203 } 204 } 205 206 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) { 207 if (ProfileInterpreter && MethodData::profile_parameters()) { 208 Label profile_continue; 209 210 test_method_data_pointer(mdp, profile_continue); 211 212 // Load the offset of the area within the MDO used for 213 // parameters. If it's negative we're not profiling any parameters 214 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()))); 215 testl(tmp1, tmp1); 216 jcc(Assembler::negative, profile_continue); 217 218 // Compute a pointer to the area for parameters from the offset 219 // and move the pointer to the slot for the last 220 // parameters. Collect profiling from last parameter down. 221 // mdo start + parameters offset + array length - 1 222 addptr(mdp, tmp1); 223 movptr(tmp1, Address(mdp, ArrayData::array_len_offset())); 224 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 225 226 Label loop; 227 bind(loop); 228 229 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0)); 230 int type_base = in_bytes(ParametersTypeData::type_offset(0)); 231 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size); 232 Address arg_off(mdp, tmp1, per_arg_scale, off_base); 233 Address arg_type(mdp, tmp1, per_arg_scale, type_base); 234 235 // load offset on the stack from the slot for this parameter 236 movptr(tmp2, arg_off); 237 negptr(tmp2); 238 // read the parameter from the local area 239 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale())); 240 241 // profile the parameter 242 profile_obj_type(tmp2, arg_type); 243 244 // go to next parameter 245 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 246 jcc(Assembler::positive, loop); 247 248 bind(profile_continue); 249 } 250 } 251 252 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, 253 int number_of_arguments) { 254 // interpreter specific 255 // 256 // Note: No need to save/restore bcp & locals registers 257 // since these are callee saved registers and no blocking/ 258 // GC can happen in leaf calls. 259 // Further Note: DO NOT save/restore bcp/locals. If a caller has 260 // already saved them so that it can use rsi/rdi as temporaries 261 // then a save/restore here will DESTROY the copy the caller 262 // saved! There used to be a save_bcp() that only happened in 263 // the ASSERT path (no restore_bcp). Which caused bizarre failures 264 // when jvm built with ASSERTs. 265 #ifdef ASSERT 266 { 267 Label L; 268 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 269 jcc(Assembler::equal, L); 270 stop("InterpreterMacroAssembler::call_VM_leaf_base:" 271 " last_sp != NULL"); 272 bind(L); 273 } 274 #endif 275 // super call 276 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 277 // interpreter specific 278 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals 279 // but since they may not have been saved (and we don't want to 280 // save them here (see note above) the assert is invalid. 281 } 282 283 void InterpreterMacroAssembler::call_VM_base(Register oop_result, 284 Register java_thread, 285 Register last_java_sp, 286 address entry_point, 287 int number_of_arguments, 288 bool check_exceptions) { 289 // interpreter specific 290 // 291 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't 292 // really make a difference for these runtime calls, since they are 293 // slow anyway. Btw., bcp must be saved/restored since it may change 294 // due to GC. 295 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");) 296 save_bcp(); 297 #ifdef ASSERT 298 { 299 Label L; 300 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 301 jcc(Assembler::equal, L); 302 stop("InterpreterMacroAssembler::call_VM_base:" 303 " last_sp != NULL"); 304 bind(L); 305 } 306 #endif /* ASSERT */ 307 // super call 308 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, 309 entry_point, number_of_arguments, 310 check_exceptions); 311 // interpreter specific 312 restore_bcp(); 313 restore_locals(); 314 } 315 316 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { 317 if (JvmtiExport::can_pop_frame()) { 318 Label L; 319 // Initiate popframe handling only if it is not already being 320 // processed. If the flag has the popframe_processing bit set, it 321 // means that this code is called *during* popframe handling - we 322 // don't want to reenter. 323 // This method is only called just after the call into the vm in 324 // call_VM_base, so the arg registers are available. 325 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit 326 LP64_ONLY(c_rarg0); 327 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset())); 328 testl(pop_cond, JavaThread::popframe_pending_bit); 329 jcc(Assembler::zero, L); 330 testl(pop_cond, JavaThread::popframe_processing_bit); 331 jcc(Assembler::notZero, L); 332 // Call Interpreter::remove_activation_preserving_args_entry() to get the 333 // address of the same-named entrypoint in the generated interpreter code. 334 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); 335 jmp(rax); 336 bind(L); 337 NOT_LP64(get_thread(java_thread);) 338 } 339 } 340 341 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { 342 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 343 NOT_LP64(get_thread(thread);) 344 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 345 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); 346 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); 347 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); 348 #ifdef _LP64 349 switch (state) { 350 case atos: movptr(rax, oop_addr); 351 movptr(oop_addr, (int32_t)NULL_WORD); 352 verify_oop(rax, state); break; 353 case ltos: movptr(rax, val_addr); break; 354 case btos: // fall through 355 case ztos: // fall through 356 case ctos: // fall through 357 case stos: // fall through 358 case itos: movl(rax, val_addr); break; 359 case ftos: load_float(val_addr); break; 360 case dtos: load_double(val_addr); break; 361 case vtos: /* nothing to do */ break; 362 default : ShouldNotReachHere(); 363 } 364 // Clean up tos value in the thread object 365 movl(tos_addr, (int) ilgl); 366 movl(val_addr, (int32_t) NULL_WORD); 367 #else 368 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() 369 + in_ByteSize(wordSize)); 370 switch (state) { 371 case atos: movptr(rax, oop_addr); 372 movptr(oop_addr, NULL_WORD); 373 verify_oop(rax, state); break; 374 case ltos: 375 movl(rdx, val_addr1); // fall through 376 case btos: // fall through 377 case ztos: // fall through 378 case ctos: // fall through 379 case stos: // fall through 380 case itos: movl(rax, val_addr); break; 381 case ftos: load_float(val_addr); break; 382 case dtos: load_double(val_addr); break; 383 case vtos: /* nothing to do */ break; 384 default : ShouldNotReachHere(); 385 } 386 #endif // _LP64 387 // Clean up tos value in the thread object 388 movl(tos_addr, (int32_t) ilgl); 389 movptr(val_addr, NULL_WORD); 390 NOT_LP64(movptr(val_addr1, NULL_WORD);) 391 } 392 393 394 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { 395 if (JvmtiExport::can_force_early_return()) { 396 Label L; 397 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread); 398 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread); 399 400 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 401 testptr(tmp, tmp); 402 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; 403 404 // Initiate earlyret handling only if it is not already being processed. 405 // If the flag has the earlyret_processing bit set, it means that this code 406 // is called *during* earlyret handling - we don't want to reenter. 407 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset())); 408 cmpl(tmp, JvmtiThreadState::earlyret_pending); 409 jcc(Assembler::notEqual, L); 410 411 // Call Interpreter::remove_activation_early_entry() to get the address of the 412 // same-named entrypoint in the generated interpreter code. 413 NOT_LP64(get_thread(java_thread);) 414 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 415 #ifdef _LP64 416 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 417 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp); 418 #else 419 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 420 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1); 421 #endif // _LP64 422 jmp(rax); 423 bind(L); 424 NOT_LP64(get_thread(java_thread);) 425 } 426 } 427 428 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) { 429 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); 430 load_unsigned_short(reg, Address(_bcp_register, bcp_offset)); 431 bswapl(reg); 432 shrl(reg, 16); 433 } 434 435 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, 436 int bcp_offset, 437 size_t index_size) { 438 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); 439 if (index_size == sizeof(u2)) { 440 load_unsigned_short(index, Address(_bcp_register, bcp_offset)); 441 } else if (index_size == sizeof(u4)) { 442 movl(index, Address(_bcp_register, bcp_offset)); 443 // Check if the secondary index definition is still ~x, otherwise 444 // we have to change the following assembler code to calculate the 445 // plain index. 446 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); 447 notl(index); // convert to plain index 448 } else if (index_size == sizeof(u1)) { 449 load_unsigned_byte(index, Address(_bcp_register, bcp_offset)); 450 } else { 451 ShouldNotReachHere(); 452 } 453 } 454 455 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, 456 Register index, 457 int bcp_offset, 458 size_t index_size) { 459 assert_different_registers(cache, index); 460 get_cache_index_at_bcp(index, bcp_offset, index_size); 461 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 462 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 463 // convert from field index to ConstantPoolCacheEntry index 464 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); 465 shll(index, 2); 466 } 467 468 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, 469 Register index, 470 Register bytecode, 471 int byte_no, 472 int bcp_offset, 473 size_t index_size) { 474 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); 475 // We use a 32-bit load here since the layout of 64-bit words on 476 // little-endian machines allow us that. 477 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); 478 const int shift_count = (1 + byte_no) * BitsPerByte; 479 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || 480 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), 481 "correct shift count"); 482 shrl(bytecode, shift_count); 483 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); 484 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); 485 } 486 487 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, 488 Register tmp, 489 int bcp_offset, 490 size_t index_size) { 491 assert_different_registers(cache, tmp); 492 493 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(Register result, 507 Register index, 508 Register tmp) { 509 assert_different_registers(result, index); 510 511 get_constant_pool(result); 512 // load pointer for resolved_references[] objArray 513 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes())); 514 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes())); 515 resolve_oop_handle(result, tmp); 516 load_heap_oop(result, Address(result, index, 517 UseCompressedOops ? Address::times_4 : Address::times_ptr, 518 arrayOopDesc::base_offset_in_bytes(T_OBJECT)), tmp); 519 } 520 521 // load cpool->resolved_klass_at(index) 522 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register klass, 523 Register cpool, 524 Register index) { 525 assert_different_registers(cpool, index); 526 527 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool))); 528 Register resolved_klasses = cpool; 529 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes())); 530 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes())); 531 } 532 533 void InterpreterMacroAssembler::load_resolved_method_at_index(int byte_no, 534 Register method, 535 Register cache, 536 Register index) { 537 assert_different_registers(cache, index); 538 539 const int method_offset = in_bytes( 540 ConstantPoolCache::base_offset() + 541 ((byte_no == TemplateTable::f2_byte) 542 ? ConstantPoolCacheEntry::f2_offset() 543 : ConstantPoolCacheEntry::f1_offset())); 544 545 movptr(method, Address(cache, index, Address::times_ptr, method_offset)); // get f1 Method* 546 } 547 548 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a 549 // subtype of super_klass. 550 // 551 // Args: 552 // rax: superklass 553 // Rsub_klass: subklass 554 // 555 // Kills: 556 // rcx, rdi 557 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, 558 Label& ok_is_subtype, 559 bool profile) { 560 assert(Rsub_klass != rax, "rax holds superklass"); 561 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");) 562 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");) 563 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); 564 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); 565 566 // Profile the not-null value's klass. 567 if (profile) { 568 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 569 } 570 571 // Do the check. 572 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 573 574 // Profile the failure of the check. 575 if (profile) { 576 profile_typecheck_failed(rcx); // blows rcx 577 } 578 } 579 580 581 #ifndef _LP64 582 void InterpreterMacroAssembler::f2ieee() { 583 if (IEEEPrecision) { 584 fstp_s(Address(rsp, 0)); 585 fld_s(Address(rsp, 0)); 586 } 587 } 588 589 590 void InterpreterMacroAssembler::d2ieee() { 591 if (IEEEPrecision) { 592 fstp_d(Address(rsp, 0)); 593 fld_d(Address(rsp, 0)); 594 } 595 } 596 #endif // _LP64 597 598 // Java Expression Stack 599 600 void InterpreterMacroAssembler::pop_ptr(Register r) { 601 pop(r); 602 } 603 604 void InterpreterMacroAssembler::push_ptr(Register r) { 605 push(r); 606 } 607 608 void InterpreterMacroAssembler::push_i(Register r) { 609 push(r); 610 } 611 612 void InterpreterMacroAssembler::push_f(XMMRegister r) { 613 subptr(rsp, wordSize); 614 movflt(Address(rsp, 0), r); 615 } 616 617 void InterpreterMacroAssembler::pop_f(XMMRegister r) { 618 movflt(r, Address(rsp, 0)); 619 addptr(rsp, wordSize); 620 } 621 622 void InterpreterMacroAssembler::push_d(XMMRegister r) { 623 subptr(rsp, 2 * wordSize); 624 movdbl(Address(rsp, 0), r); 625 } 626 627 void InterpreterMacroAssembler::pop_d(XMMRegister r) { 628 movdbl(r, Address(rsp, 0)); 629 addptr(rsp, 2 * Interpreter::stackElementSize); 630 } 631 632 #ifdef _LP64 633 void InterpreterMacroAssembler::pop_i(Register r) { 634 // XXX can't use pop currently, upper half non clean 635 movl(r, Address(rsp, 0)); 636 addptr(rsp, wordSize); 637 } 638 639 void InterpreterMacroAssembler::pop_l(Register r) { 640 movq(r, Address(rsp, 0)); 641 addptr(rsp, 2 * Interpreter::stackElementSize); 642 } 643 644 void InterpreterMacroAssembler::push_l(Register r) { 645 subptr(rsp, 2 * wordSize); 646 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r ); 647 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD ); 648 } 649 650 void InterpreterMacroAssembler::pop(TosState state) { 651 switch (state) { 652 case atos: pop_ptr(); break; 653 case btos: 654 case ztos: 655 case ctos: 656 case stos: 657 case itos: pop_i(); break; 658 case ltos: pop_l(); break; 659 case ftos: pop_f(xmm0); break; 660 case dtos: pop_d(xmm0); break; 661 case vtos: /* nothing to do */ break; 662 default: ShouldNotReachHere(); 663 } 664 verify_oop(rax, state); 665 } 666 667 void InterpreterMacroAssembler::push(TosState state) { 668 verify_oop(rax, state); 669 switch (state) { 670 case atos: push_ptr(); break; 671 case btos: 672 case ztos: 673 case ctos: 674 case stos: 675 case itos: push_i(); break; 676 case ltos: push_l(); break; 677 case ftos: push_f(xmm0); break; 678 case dtos: push_d(xmm0); break; 679 case vtos: /* nothing to do */ break; 680 default : ShouldNotReachHere(); 681 } 682 } 683 #else 684 void InterpreterMacroAssembler::pop_i(Register r) { 685 pop(r); 686 } 687 688 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 689 pop(lo); 690 pop(hi); 691 } 692 693 void InterpreterMacroAssembler::pop_f() { 694 fld_s(Address(rsp, 0)); 695 addptr(rsp, 1 * wordSize); 696 } 697 698 void InterpreterMacroAssembler::pop_d() { 699 fld_d(Address(rsp, 0)); 700 addptr(rsp, 2 * wordSize); 701 } 702 703 704 void InterpreterMacroAssembler::pop(TosState state) { 705 switch (state) { 706 case atos: pop_ptr(rax); break; 707 case btos: // fall through 708 case ztos: // fall through 709 case ctos: // fall through 710 case stos: // fall through 711 case itos: pop_i(rax); break; 712 case ltos: pop_l(rax, rdx); break; 713 case ftos: 714 if (UseSSE >= 1) { 715 pop_f(xmm0); 716 } else { 717 pop_f(); 718 } 719 break; 720 case dtos: 721 if (UseSSE >= 2) { 722 pop_d(xmm0); 723 } else { 724 pop_d(); 725 } 726 break; 727 case vtos: /* nothing to do */ break; 728 default : ShouldNotReachHere(); 729 } 730 verify_oop(rax, state); 731 } 732 733 734 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 735 push(hi); 736 push(lo); 737 } 738 739 void InterpreterMacroAssembler::push_f() { 740 // Do not schedule for no AGI! Never write beyond rsp! 741 subptr(rsp, 1 * wordSize); 742 fstp_s(Address(rsp, 0)); 743 } 744 745 void InterpreterMacroAssembler::push_d() { 746 // Do not schedule for no AGI! Never write beyond rsp! 747 subptr(rsp, 2 * wordSize); 748 fstp_d(Address(rsp, 0)); 749 } 750 751 752 void InterpreterMacroAssembler::push(TosState state) { 753 verify_oop(rax, state); 754 switch (state) { 755 case atos: push_ptr(rax); break; 756 case btos: // fall through 757 case ztos: // fall through 758 case ctos: // fall through 759 case stos: // fall through 760 case itos: push_i(rax); break; 761 case ltos: push_l(rax, rdx); break; 762 case ftos: 763 if (UseSSE >= 1) { 764 push_f(xmm0); 765 } else { 766 push_f(); 767 } 768 break; 769 case dtos: 770 if (UseSSE >= 2) { 771 push_d(xmm0); 772 } else { 773 push_d(); 774 } 775 break; 776 case vtos: /* nothing to do */ break; 777 default : ShouldNotReachHere(); 778 } 779 } 780 #endif // _LP64 781 782 783 // Helpers for swap and dup 784 void InterpreterMacroAssembler::load_ptr(int n, Register val) { 785 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 786 } 787 788 void InterpreterMacroAssembler::store_ptr(int n, Register val) { 789 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 790 } 791 792 793 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 794 // set sender sp 795 lea(_bcp_register, Address(rsp, wordSize)); 796 // record last_sp 797 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register); 798 } 799 800 801 // Jump to from_interpreted entry of a call unless single stepping is possible 802 // in this thread in which case we must call the i2i entry 803 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 804 prepare_to_jump_from_interpreted(); 805 806 if (JvmtiExport::can_post_interpreter_events()) { 807 Label run_compiled_code; 808 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 809 // compiled code in threads for which the event is enabled. Check here for 810 // interp_only_mode if these events CAN be enabled. 811 // interp_only is an int, on little endian it is sufficient to test the byte only 812 // Is a cmpl faster? 813 LP64_ONLY(temp = r15_thread;) 814 NOT_LP64(get_thread(temp);) 815 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 816 jccb(Assembler::zero, run_compiled_code); 817 jmp(Address(method, Method::interpreter_entry_offset())); 818 bind(run_compiled_code); 819 } 820 821 jmp(Address(method, Method::from_interpreted_offset())); 822 } 823 824 // The following two routines provide a hook so that an implementation 825 // can schedule the dispatch in two parts. x86 does not do this. 826 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 827 // Nothing x86 specific to be done here 828 } 829 830 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 831 dispatch_next(state, step); 832 } 833 834 void InterpreterMacroAssembler::dispatch_base(TosState state, 835 address* table, 836 bool verifyoop, 837 bool generate_poll) { 838 verify_FPU(1, state); 839 if (VerifyActivationFrameSize) { 840 Label L; 841 mov(rcx, rbp); 842 subptr(rcx, rsp); 843 int32_t min_frame_size = 844 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * 845 wordSize; 846 cmpptr(rcx, (int32_t)min_frame_size); 847 jcc(Assembler::greaterEqual, L); 848 stop("broken stack frame"); 849 bind(L); 850 } 851 if (verifyoop) { 852 verify_oop(rax, state); 853 } 854 855 address* const safepoint_table = Interpreter::safept_table(state); 856 #ifdef _LP64 857 Label no_safepoint, dispatch; 858 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) { 859 NOT_PRODUCT(block_comment("Thread-local Safepoint poll")); 860 testb(Address(r15_thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 861 862 jccb(Assembler::zero, no_safepoint); 863 lea(rscratch1, ExternalAddress((address)safepoint_table)); 864 jmpb(dispatch); 865 } 866 867 bind(no_safepoint); 868 lea(rscratch1, ExternalAddress((address)table)); 869 bind(dispatch); 870 jmp(Address(rscratch1, rbx, Address::times_8)); 871 872 #else 873 Address index(noreg, rbx, Address::times_ptr); 874 if (SafepointMechanism::uses_thread_local_poll() && table != safepoint_table && generate_poll) { 875 NOT_PRODUCT(block_comment("Thread-local Safepoint poll")); 876 Label no_safepoint; 877 const Register thread = rcx; 878 get_thread(thread); 879 testb(Address(thread, Thread::polling_page_offset()), SafepointMechanism::poll_bit()); 880 881 jccb(Assembler::zero, no_safepoint); 882 ArrayAddress dispatch_addr(ExternalAddress((address)safepoint_table), index); 883 jump(dispatch_addr); 884 bind(no_safepoint); 885 } 886 887 { 888 ArrayAddress dispatch_addr(ExternalAddress((address)table), index); 889 jump(dispatch_addr); 890 } 891 #endif // _LP64 892 } 893 894 void InterpreterMacroAssembler::dispatch_only(TosState state, bool generate_poll) { 895 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll); 896 } 897 898 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 899 dispatch_base(state, Interpreter::normal_table(state)); 900 } 901 902 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 903 dispatch_base(state, Interpreter::normal_table(state), false); 904 } 905 906 907 void InterpreterMacroAssembler::dispatch_next(TosState state, int step, bool generate_poll) { 908 // load next bytecode (load before advancing _bcp_register to prevent AGI) 909 load_unsigned_byte(rbx, Address(_bcp_register, step)); 910 // advance _bcp_register 911 increment(_bcp_register, step); 912 dispatch_base(state, Interpreter::dispatch_table(state), true, generate_poll); 913 } 914 915 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 916 // load current bytecode 917 load_unsigned_byte(rbx, Address(_bcp_register, 0)); 918 dispatch_base(state, table); 919 } 920 921 void InterpreterMacroAssembler::narrow(Register result) { 922 923 // Get method->_constMethod->_result_type 924 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 925 movptr(rcx, Address(rcx, Method::const_offset())); 926 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset())); 927 928 Label done, notBool, notByte, notChar; 929 930 // common case first 931 cmpl(rcx, T_INT); 932 jcc(Assembler::equal, done); 933 934 // mask integer result to narrower return type. 935 cmpl(rcx, T_BOOLEAN); 936 jcc(Assembler::notEqual, notBool); 937 andl(result, 0x1); 938 jmp(done); 939 940 bind(notBool); 941 cmpl(rcx, T_BYTE); 942 jcc(Assembler::notEqual, notByte); 943 LP64_ONLY(movsbl(result, result);) 944 NOT_LP64(shll(result, 24);) // truncate upper 24 bits 945 NOT_LP64(sarl(result, 24);) // and sign-extend byte 946 jmp(done); 947 948 bind(notByte); 949 cmpl(rcx, T_CHAR); 950 jcc(Assembler::notEqual, notChar); 951 LP64_ONLY(movzwl(result, result);) 952 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits 953 jmp(done); 954 955 bind(notChar); 956 // cmpl(rcx, T_SHORT); // all that's left 957 // jcc(Assembler::notEqual, done); 958 LP64_ONLY(movswl(result, result);) 959 NOT_LP64(shll(result, 16);) // truncate upper 16 bits 960 NOT_LP64(sarl(result, 16);) // and sign-extend short 961 962 // Nothing to do for T_INT 963 bind(done); 964 } 965 966 // remove activation 967 // 968 // Unlock the receiver if this is a synchronized method. 969 // Unlock any Java monitors from syncronized blocks. 970 // Remove the activation from the stack. 971 // 972 // If there are locked Java monitors 973 // If throw_monitor_exception 974 // throws IllegalMonitorStateException 975 // Else if install_monitor_exception 976 // installs IllegalMonitorStateException 977 // Else 978 // no error processing 979 void InterpreterMacroAssembler::remove_activation( 980 TosState state, 981 Register ret_addr, 982 bool throw_monitor_exception, 983 bool install_monitor_exception, 984 bool notify_jvmdi) { 985 // Note: Registers rdx xmm0 may be in use for the 986 // result check if synchronized method 987 Label unlocked, unlock, no_unlock; 988 989 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 990 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 991 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 992 // monitor pointers need different register 993 // because rdx may have the result in it 994 NOT_LP64(get_thread(rcx);) 995 996 // get the value of _do_not_unlock_if_synchronized into rdx 997 const Address do_not_unlock_if_synchronized(rthread, 998 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 999 movbool(rbx, do_not_unlock_if_synchronized); 1000 movbool(do_not_unlock_if_synchronized, false); // reset the flag 1001 1002 // get method access flags 1003 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 1004 movl(rcx, Address(rcx, Method::access_flags_offset())); 1005 testl(rcx, JVM_ACC_SYNCHRONIZED); 1006 jcc(Assembler::zero, unlocked); 1007 1008 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 1009 // is set. 1010 testbool(rbx); 1011 jcc(Assembler::notZero, no_unlock); 1012 1013 // unlock monitor 1014 push(state); // save result 1015 1016 // BasicObjectLock will be first in list, since this is a 1017 // synchronized method. However, need to check that the object has 1018 // not been unlocked by an explicit monitorexit bytecode. 1019 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * 1020 wordSize - (int) sizeof(BasicObjectLock)); 1021 // We use c_rarg1/rdx so that if we go slow path it will be the correct 1022 // register for unlock_object to pass to VM directly 1023 lea(robj, monitor); // address of first monitor 1024 1025 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes())); 1026 testptr(rax, rax); 1027 jcc(Assembler::notZero, unlock); 1028 1029 pop(state); 1030 if (throw_monitor_exception) { 1031 // Entry already unlocked, need to throw exception 1032 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow 1033 call_VM(noreg, CAST_FROM_FN_PTR(address, 1034 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1035 should_not_reach_here(); 1036 } else { 1037 // Monitor already unlocked during a stack unroll. If requested, 1038 // install an illegal_monitor_state_exception. Continue with 1039 // stack unrolling. 1040 if (install_monitor_exception) { 1041 NOT_LP64(empty_FPU_stack();) 1042 call_VM(noreg, CAST_FROM_FN_PTR(address, 1043 InterpreterRuntime::new_illegal_monitor_state_exception)); 1044 } 1045 jmp(unlocked); 1046 } 1047 1048 bind(unlock); 1049 unlock_object(robj); 1050 pop(state); 1051 1052 // Check that for block-structured locking (i.e., that all locked 1053 // objects has been unlocked) 1054 bind(unlocked); 1055 1056 // rax, rdx: Might contain return value 1057 1058 // Check that all monitors are unlocked 1059 { 1060 Label loop, exception, entry, restart; 1061 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 1062 const Address monitor_block_top( 1063 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 1064 const Address monitor_block_bot( 1065 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 1066 1067 bind(restart); 1068 // We use c_rarg1 so that if we go slow path it will be the correct 1069 // register for unlock_object to pass to VM directly 1070 movptr(rmon, monitor_block_top); // points to current entry, starting 1071 // with top-most entry 1072 lea(rbx, monitor_block_bot); // points to word before bottom of 1073 // monitor block 1074 jmp(entry); 1075 1076 // Entry already locked, need to throw exception 1077 bind(exception); 1078 1079 if (throw_monitor_exception) { 1080 // Throw exception 1081 NOT_LP64(empty_FPU_stack();) 1082 MacroAssembler::call_VM(noreg, 1083 CAST_FROM_FN_PTR(address, InterpreterRuntime:: 1084 throw_illegal_monitor_state_exception)); 1085 should_not_reach_here(); 1086 } else { 1087 // Stack unrolling. Unlock object and install illegal_monitor_exception. 1088 // Unlock does not block, so don't have to worry about the frame. 1089 // We don't have to preserve c_rarg1 since we are going to throw an exception. 1090 1091 push(state); 1092 mov(robj, rmon); // nop if robj and rmon are the same 1093 unlock_object(robj); 1094 pop(state); 1095 1096 if (install_monitor_exception) { 1097 NOT_LP64(empty_FPU_stack();) 1098 call_VM(noreg, CAST_FROM_FN_PTR(address, 1099 InterpreterRuntime:: 1100 new_illegal_monitor_state_exception)); 1101 } 1102 1103 jmp(restart); 1104 } 1105 1106 bind(loop); 1107 // check if current entry is used 1108 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); 1109 jcc(Assembler::notEqual, exception); 1110 1111 addptr(rmon, entry_size); // otherwise advance to next entry 1112 bind(entry); 1113 cmpptr(rmon, rbx); // check if bottom reached 1114 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 1115 } 1116 1117 bind(no_unlock); 1118 1119 // jvmti support 1120 if (notify_jvmdi) { 1121 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 1122 } else { 1123 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 1124 } 1125 1126 if (StackReservedPages > 0) { 1127 movptr(rbx, 1128 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1129 // testing if reserved zone needs to be re-enabled 1130 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1131 Label no_reserved_zone_enabling; 1132 1133 NOT_LP64(get_thread(rthread);) 1134 1135 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled); 1136 jcc(Assembler::equal, no_reserved_zone_enabling); 1137 1138 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset())); 1139 jcc(Assembler::lessEqual, no_reserved_zone_enabling); 1140 1141 call_VM_leaf( 1142 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread); 1143 call_VM(noreg, CAST_FROM_FN_PTR(address, 1144 InterpreterRuntime::throw_delayed_StackOverflowError)); 1145 should_not_reach_here(); 1146 1147 bind(no_reserved_zone_enabling); 1148 } 1149 1150 // remove activation 1151 // get sender sp 1152 movptr(rbx, 1153 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1154 1155 if (state == atos && ValueTypeReturnedAsFields) { 1156 Label skip; 1157 // Test if the return type is a value type 1158 movptr(rdi, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 1159 movptr(rdi, Address(rdi, Method::const_offset())); 1160 load_unsigned_byte(rdi, Address(rdi, ConstMethod::result_type_offset())); 1161 cmpl(rdi, T_VALUETYPE); 1162 jcc(Assembler::notEqual, skip); 1163 1164 // We are returning a value type, load its fields into registers 1165 #ifndef _LP64 1166 super_call_VM_leaf(StubRoutines::load_value_type_fields_in_regs()); 1167 #else 1168 // Load fields from a buffered value with a value class specific handler 1169 load_klass(rdi, rax); 1170 movptr(rdi, Address(rdi, InstanceKlass::adr_valueklass_fixed_block_offset())); 1171 movptr(rdi, Address(rdi, ValueKlass::unpack_handler_offset())); 1172 1173 testptr(rdi, rdi); 1174 jcc(Assembler::equal, skip); 1175 1176 call(rdi); 1177 #endif 1178 // call above kills the value in rbx. Reload it. 1179 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1180 bind(skip); 1181 } 1182 leave(); // remove frame anchor 1183 pop(ret_addr); // get return address 1184 mov(rsp, rbx); // set sp to sender sp 1185 } 1186 1187 void InterpreterMacroAssembler::get_method_counters(Register method, 1188 Register mcs, Label& skip) { 1189 Label has_counters; 1190 movptr(mcs, Address(method, Method::method_counters_offset())); 1191 testptr(mcs, mcs); 1192 jcc(Assembler::notZero, has_counters); 1193 call_VM(noreg, CAST_FROM_FN_PTR(address, 1194 InterpreterRuntime::build_method_counters), method); 1195 movptr(mcs, Address(method,Method::method_counters_offset())); 1196 testptr(mcs, mcs); 1197 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory 1198 bind(has_counters); 1199 } 1200 1201 1202 // Lock object 1203 // 1204 // Args: 1205 // rdx, c_rarg1: BasicObjectLock to be used for locking 1206 // 1207 // Kills: 1208 // rax, rbx 1209 void InterpreterMacroAssembler::lock_object(Register lock_reg) { 1210 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1211 "The argument is only for looks. It must be c_rarg1"); 1212 1213 if (UseHeavyMonitors) { 1214 call_VM(noreg, 1215 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1216 lock_reg); 1217 } else { 1218 Label done; 1219 1220 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1221 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a 1222 // problematic case where tmp_reg = no_reg. 1223 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1224 1225 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 1226 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 1227 const int mark_offset = lock_offset + 1228 BasicLock::displaced_header_offset_in_bytes(); 1229 1230 Label slow_case; 1231 1232 // Load object pointer into obj_reg 1233 movptr(obj_reg, Address(lock_reg, obj_offset)); 1234 1235 if (UseBiasedLocking) { 1236 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case); 1237 } 1238 1239 // Load immediate 1 into swap_reg %rax 1240 movl(swap_reg, (int32_t)1); 1241 1242 // Load (object->mark() | 1) into swap_reg %rax 1243 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1244 if (EnableValhalla && !UseBiasedLocking) { 1245 // For slow path is_always_locked, using biased, which is never natural for !UseBiasLocking 1246 andptr(swap_reg, ~((int) markWord::biased_lock_bit_in_place)); 1247 } 1248 1249 // Save (object->mark() | 1) into BasicLock's displaced header 1250 movptr(Address(lock_reg, mark_offset), swap_reg); 1251 1252 assert(lock_offset == 0, 1253 "displaced header must be first word in BasicObjectLock"); 1254 1255 lock(); 1256 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1257 if (PrintBiasedLockingStatistics) { 1258 cond_inc32(Assembler::zero, 1259 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1260 } 1261 jcc(Assembler::zero, done); 1262 1263 const int zero_bits = LP64_ONLY(7) NOT_LP64(3); 1264 1265 // Test if the oopMark is an obvious stack pointer, i.e., 1266 // 1) (mark & zero_bits) == 0, and 1267 // 2) rsp <= mark < mark + os::pagesize() 1268 // 1269 // These 3 tests can be done by evaluating the following 1270 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())), 1271 // assuming both stack pointer and pagesize have their 1272 // least significant bits clear. 1273 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg 1274 subptr(swap_reg, rsp); 1275 andptr(swap_reg, zero_bits - os::vm_page_size()); 1276 1277 // Save the test result, for recursive case, the result is zero 1278 movptr(Address(lock_reg, mark_offset), swap_reg); 1279 1280 if (PrintBiasedLockingStatistics) { 1281 cond_inc32(Assembler::zero, 1282 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1283 } 1284 jcc(Assembler::zero, done); 1285 1286 bind(slow_case); 1287 1288 // Call the runtime routine for slow case 1289 call_VM(noreg, 1290 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1291 lock_reg); 1292 1293 bind(done); 1294 } 1295 } 1296 1297 1298 // Unlocks an object. Used in monitorexit bytecode and 1299 // remove_activation. Throws an IllegalMonitorException if object is 1300 // not locked by current thread. 1301 // 1302 // Args: 1303 // rdx, c_rarg1: BasicObjectLock for lock 1304 // 1305 // Kills: 1306 // rax 1307 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) 1308 // rscratch1 (scratch reg) 1309 // rax, rbx, rcx, rdx 1310 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 1311 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1312 "The argument is only for looks. It must be c_rarg1"); 1313 1314 if (UseHeavyMonitors) { 1315 call_VM(noreg, 1316 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1317 lock_reg); 1318 } else { 1319 Label done; 1320 1321 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1322 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark 1323 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1324 1325 save_bcp(); // Save in case of exception 1326 1327 // Convert from BasicObjectLock structure to object and BasicLock 1328 // structure Store the BasicLock address into %rax 1329 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 1330 1331 // Load oop into obj_reg(%c_rarg3) 1332 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); 1333 1334 // Free entry 1335 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); 1336 1337 if (UseBiasedLocking) { 1338 biased_locking_exit(obj_reg, header_reg, done); 1339 } 1340 1341 // Load the old header from BasicLock structure 1342 movptr(header_reg, Address(swap_reg, 1343 BasicLock::displaced_header_offset_in_bytes())); 1344 1345 // Test for recursion 1346 testptr(header_reg, header_reg); 1347 1348 // zero for recursive case 1349 jcc(Assembler::zero, done); 1350 1351 // Atomic swap back the old header 1352 lock(); 1353 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1354 1355 // zero for simple unlock of a stack-lock case 1356 jcc(Assembler::zero, done); 1357 1358 // Call the runtime routine for slow case. 1359 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), 1360 obj_reg); // restore obj 1361 call_VM(noreg, 1362 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1363 lock_reg); 1364 1365 bind(done); 1366 1367 restore_bcp(); 1368 } 1369 } 1370 1371 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, 1372 Label& zero_continue) { 1373 assert(ProfileInterpreter, "must be profiling interpreter"); 1374 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize)); 1375 testptr(mdp, mdp); 1376 jcc(Assembler::zero, zero_continue); 1377 } 1378 1379 1380 // Set the method data pointer for the current bcp. 1381 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1382 assert(ProfileInterpreter, "must be profiling interpreter"); 1383 Label set_mdp; 1384 push(rax); 1385 push(rbx); 1386 1387 get_method(rbx); 1388 // Test MDO to avoid the call if it is NULL. 1389 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 1390 testptr(rax, rax); 1391 jcc(Assembler::zero, set_mdp); 1392 // rbx: method 1393 // _bcp_register: bcp 1394 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register); 1395 // rax: mdi 1396 // mdo is guaranteed to be non-zero here, we checked for it before the call. 1397 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 1398 addptr(rbx, in_bytes(MethodData::data_offset())); 1399 addptr(rax, rbx); 1400 bind(set_mdp); 1401 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax); 1402 pop(rbx); 1403 pop(rax); 1404 } 1405 1406 void InterpreterMacroAssembler::verify_method_data_pointer() { 1407 assert(ProfileInterpreter, "must be profiling interpreter"); 1408 #ifdef ASSERT 1409 Label verify_continue; 1410 push(rax); 1411 push(rbx); 1412 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 1413 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 1414 push(arg3_reg); 1415 push(arg2_reg); 1416 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue 1417 get_method(rbx); 1418 1419 // If the mdp is valid, it will point to a DataLayout header which is 1420 // consistent with the bcp. The converse is highly probable also. 1421 load_unsigned_short(arg2_reg, 1422 Address(arg3_reg, in_bytes(DataLayout::bci_offset()))); 1423 addptr(arg2_reg, Address(rbx, Method::const_offset())); 1424 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset())); 1425 cmpptr(arg2_reg, _bcp_register); 1426 jcc(Assembler::equal, verify_continue); 1427 // rbx: method 1428 // _bcp_register: bcp 1429 // c_rarg3: mdp 1430 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), 1431 rbx, _bcp_register, arg3_reg); 1432 bind(verify_continue); 1433 pop(arg2_reg); 1434 pop(arg3_reg); 1435 pop(rbx); 1436 pop(rax); 1437 #endif // ASSERT 1438 } 1439 1440 1441 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, 1442 int constant, 1443 Register value) { 1444 assert(ProfileInterpreter, "must be profiling interpreter"); 1445 Address data(mdp_in, constant); 1446 movptr(data, value); 1447 } 1448 1449 1450 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1451 int constant, 1452 bool decrement) { 1453 // Counter address 1454 Address data(mdp_in, constant); 1455 1456 increment_mdp_data_at(data, decrement); 1457 } 1458 1459 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 1460 bool decrement) { 1461 assert(ProfileInterpreter, "must be profiling interpreter"); 1462 // %%% this does 64bit counters at best it is wasting space 1463 // at worst it is a rare bug when counters overflow 1464 1465 if (decrement) { 1466 // Decrement the register. Set condition codes. 1467 addptr(data, (int32_t) -DataLayout::counter_increment); 1468 // If the decrement causes the counter to overflow, stay negative 1469 Label L; 1470 jcc(Assembler::negative, L); 1471 addptr(data, (int32_t) DataLayout::counter_increment); 1472 bind(L); 1473 } else { 1474 assert(DataLayout::counter_increment == 1, 1475 "flow-free idiom only works with 1"); 1476 // Increment the register. Set carry flag. 1477 addptr(data, DataLayout::counter_increment); 1478 // If the increment causes the counter to overflow, pull back by 1. 1479 sbbptr(data, (int32_t)0); 1480 } 1481 } 1482 1483 1484 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1485 Register reg, 1486 int constant, 1487 bool decrement) { 1488 Address data(mdp_in, reg, Address::times_1, constant); 1489 1490 increment_mdp_data_at(data, decrement); 1491 } 1492 1493 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, 1494 int flag_byte_constant) { 1495 assert(ProfileInterpreter, "must be profiling interpreter"); 1496 int header_offset = in_bytes(DataLayout::flags_offset()); 1497 int header_bits = flag_byte_constant; 1498 // Set the flag 1499 orb(Address(mdp_in, header_offset), header_bits); 1500 } 1501 1502 1503 1504 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 1505 int offset, 1506 Register value, 1507 Register test_value_out, 1508 Label& not_equal_continue) { 1509 assert(ProfileInterpreter, "must be profiling interpreter"); 1510 if (test_value_out == noreg) { 1511 cmpptr(value, Address(mdp_in, offset)); 1512 } else { 1513 // Put the test value into a register, so caller can use it: 1514 movptr(test_value_out, Address(mdp_in, offset)); 1515 cmpptr(test_value_out, value); 1516 } 1517 jcc(Assembler::notEqual, not_equal_continue); 1518 } 1519 1520 1521 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1522 int offset_of_disp) { 1523 assert(ProfileInterpreter, "must be profiling interpreter"); 1524 Address disp_address(mdp_in, offset_of_disp); 1525 addptr(mdp_in, disp_address); 1526 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1527 } 1528 1529 1530 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1531 Register reg, 1532 int offset_of_disp) { 1533 assert(ProfileInterpreter, "must be profiling interpreter"); 1534 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 1535 addptr(mdp_in, disp_address); 1536 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1537 } 1538 1539 1540 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, 1541 int constant) { 1542 assert(ProfileInterpreter, "must be profiling interpreter"); 1543 addptr(mdp_in, constant); 1544 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1545 } 1546 1547 1548 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 1549 assert(ProfileInterpreter, "must be profiling interpreter"); 1550 push(return_bci); // save/restore across call_VM 1551 call_VM(noreg, 1552 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), 1553 return_bci); 1554 pop(return_bci); 1555 } 1556 1557 1558 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, 1559 Register bumped_count) { 1560 if (ProfileInterpreter) { 1561 Label profile_continue; 1562 1563 // If no method data exists, go to profile_continue. 1564 // Otherwise, assign to mdp 1565 test_method_data_pointer(mdp, profile_continue); 1566 1567 // We are taking a branch. Increment the taken count. 1568 // We inline increment_mdp_data_at to return bumped_count in a register 1569 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1570 Address data(mdp, in_bytes(JumpData::taken_offset())); 1571 movptr(bumped_count, data); 1572 assert(DataLayout::counter_increment == 1, 1573 "flow-free idiom only works with 1"); 1574 addptr(bumped_count, DataLayout::counter_increment); 1575 sbbptr(bumped_count, 0); 1576 movptr(data, bumped_count); // Store back out 1577 1578 // The method data pointer needs to be updated to reflect the new target. 1579 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1580 bind(profile_continue); 1581 } 1582 } 1583 1584 1585 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1586 if (ProfileInterpreter) { 1587 Label profile_continue; 1588 1589 // If no method data exists, go to profile_continue. 1590 test_method_data_pointer(mdp, profile_continue); 1591 1592 // We are taking a branch. Increment the not taken count. 1593 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1594 1595 // The method data pointer needs to be updated to correspond to 1596 // the next bytecode 1597 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1598 bind(profile_continue); 1599 } 1600 } 1601 1602 void InterpreterMacroAssembler::profile_call(Register mdp) { 1603 if (ProfileInterpreter) { 1604 Label profile_continue; 1605 1606 // If no method data exists, go to profile_continue. 1607 test_method_data_pointer(mdp, profile_continue); 1608 1609 // We are making a call. Increment the count. 1610 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1611 1612 // The method data pointer needs to be updated to reflect the new target. 1613 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1614 bind(profile_continue); 1615 } 1616 } 1617 1618 1619 void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1620 if (ProfileInterpreter) { 1621 Label profile_continue; 1622 1623 // If no method data exists, go to profile_continue. 1624 test_method_data_pointer(mdp, profile_continue); 1625 1626 // We are making a call. Increment the count. 1627 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1628 1629 // The method data pointer needs to be updated to reflect the new target. 1630 update_mdp_by_constant(mdp, 1631 in_bytes(VirtualCallData:: 1632 virtual_call_data_size())); 1633 bind(profile_continue); 1634 } 1635 } 1636 1637 1638 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, 1639 Register mdp, 1640 Register reg2, 1641 bool receiver_can_be_null) { 1642 if (ProfileInterpreter) { 1643 Label profile_continue; 1644 1645 // If no method data exists, go to profile_continue. 1646 test_method_data_pointer(mdp, profile_continue); 1647 1648 Label skip_receiver_profile; 1649 if (receiver_can_be_null) { 1650 Label not_null; 1651 testptr(receiver, receiver); 1652 jccb(Assembler::notZero, not_null); 1653 // We are making a call. Increment the count for null receiver. 1654 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1655 jmp(skip_receiver_profile); 1656 bind(not_null); 1657 } 1658 1659 // Record the receiver type. 1660 record_klass_in_profile(receiver, mdp, reg2, true); 1661 bind(skip_receiver_profile); 1662 1663 // The method data pointer needs to be updated to reflect the new target. 1664 #if INCLUDE_JVMCI 1665 if (MethodProfileWidth == 0) { 1666 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1667 } 1668 #else // INCLUDE_JVMCI 1669 update_mdp_by_constant(mdp, 1670 in_bytes(VirtualCallData:: 1671 virtual_call_data_size())); 1672 #endif // INCLUDE_JVMCI 1673 bind(profile_continue); 1674 } 1675 } 1676 1677 #if INCLUDE_JVMCI 1678 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) { 1679 assert_different_registers(method, mdp, reg2); 1680 if (ProfileInterpreter && MethodProfileWidth > 0) { 1681 Label profile_continue; 1682 1683 // If no method data exists, go to profile_continue. 1684 test_method_data_pointer(mdp, profile_continue); 1685 1686 Label done; 1687 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth, 1688 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset())); 1689 bind(done); 1690 1691 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1692 bind(profile_continue); 1693 } 1694 } 1695 #endif // INCLUDE_JVMCI 1696 1697 // This routine creates a state machine for updating the multi-row 1698 // type profile at a virtual call site (or other type-sensitive bytecode). 1699 // The machine visits each row (of receiver/count) until the receiver type 1700 // is found, or until it runs out of rows. At the same time, it remembers 1701 // the location of the first empty row. (An empty row records null for its 1702 // receiver, and can be allocated for a newly-observed receiver type.) 1703 // Because there are two degrees of freedom in the state, a simple linear 1704 // search will not work; it must be a decision tree. Hence this helper 1705 // function is recursive, to generate the required tree structured code. 1706 // It's the interpreter, so we are trading off code space for speed. 1707 // See below for example code. 1708 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1709 Register receiver, Register mdp, 1710 Register reg2, int start_row, 1711 Label& done, bool is_virtual_call) { 1712 if (TypeProfileWidth == 0) { 1713 if (is_virtual_call) { 1714 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1715 } 1716 #if INCLUDE_JVMCI 1717 else if (EnableJVMCI) { 1718 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset())); 1719 } 1720 #endif // INCLUDE_JVMCI 1721 } else { 1722 int non_profiled_offset = -1; 1723 if (is_virtual_call) { 1724 non_profiled_offset = in_bytes(CounterData::count_offset()); 1725 } 1726 #if INCLUDE_JVMCI 1727 else if (EnableJVMCI) { 1728 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()); 1729 } 1730 #endif // INCLUDE_JVMCI 1731 1732 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth, 1733 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset); 1734 } 1735 } 1736 1737 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, 1738 Register reg2, int start_row, Label& done, int total_rows, 1739 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn, 1740 int non_profiled_offset) { 1741 int last_row = total_rows - 1; 1742 assert(start_row <= last_row, "must be work left to do"); 1743 // Test this row for both the item and for null. 1744 // Take any of three different outcomes: 1745 // 1. found item => increment count and goto done 1746 // 2. found null => keep looking for case 1, maybe allocate this cell 1747 // 3. found something else => keep looking for cases 1 and 2 1748 // Case 3 is handled by a recursive call. 1749 for (int row = start_row; row <= last_row; row++) { 1750 Label next_test; 1751 bool test_for_null_also = (row == start_row); 1752 1753 // See if the item is item[n]. 1754 int item_offset = in_bytes(item_offset_fn(row)); 1755 test_mdp_data_at(mdp, item_offset, item, 1756 (test_for_null_also ? reg2 : noreg), 1757 next_test); 1758 // (Reg2 now contains the item from the CallData.) 1759 1760 // The item is item[n]. Increment count[n]. 1761 int count_offset = in_bytes(item_count_offset_fn(row)); 1762 increment_mdp_data_at(mdp, count_offset); 1763 jmp(done); 1764 bind(next_test); 1765 1766 if (test_for_null_also) { 1767 // Failed the equality check on item[n]... Test for null. 1768 testptr(reg2, reg2); 1769 if (start_row == last_row) { 1770 // The only thing left to do is handle the null case. 1771 if (non_profiled_offset >= 0) { 1772 Label found_null; 1773 jccb(Assembler::zero, found_null); 1774 // Item did not match any saved item and there is no empty row for it. 1775 // Increment total counter to indicate polymorphic case. 1776 increment_mdp_data_at(mdp, non_profiled_offset); 1777 jmp(done); 1778 bind(found_null); 1779 } else { 1780 jcc(Assembler::notZero, done); 1781 } 1782 break; 1783 } 1784 Label found_null; 1785 // Since null is rare, make it be the branch-taken case. 1786 jcc(Assembler::zero, found_null); 1787 1788 // Put all the "Case 3" tests here. 1789 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows, 1790 item_offset_fn, item_count_offset_fn, non_profiled_offset); 1791 1792 // Found a null. Keep searching for a matching item, 1793 // but remember that this is an empty (unused) slot. 1794 bind(found_null); 1795 } 1796 } 1797 1798 // In the fall-through case, we found no matching item, but we 1799 // observed the item[start_row] is NULL. 1800 1801 // Fill in the item field and increment the count. 1802 int item_offset = in_bytes(item_offset_fn(start_row)); 1803 set_mdp_data_at(mdp, item_offset, item); 1804 int count_offset = in_bytes(item_count_offset_fn(start_row)); 1805 movl(reg2, DataLayout::counter_increment); 1806 set_mdp_data_at(mdp, count_offset, reg2); 1807 if (start_row > 0) { 1808 jmp(done); 1809 } 1810 } 1811 1812 // Example state machine code for three profile rows: 1813 // // main copy of decision tree, rooted at row[1] 1814 // if (row[0].rec == rec) { row[0].incr(); goto done; } 1815 // if (row[0].rec != NULL) { 1816 // // inner copy of decision tree, rooted at row[1] 1817 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1818 // if (row[1].rec != NULL) { 1819 // // degenerate decision tree, rooted at row[2] 1820 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1821 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow 1822 // row[2].init(rec); goto done; 1823 // } else { 1824 // // remember row[1] is empty 1825 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1826 // row[1].init(rec); goto done; 1827 // } 1828 // } else { 1829 // // remember row[0] is empty 1830 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1831 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1832 // row[0].init(rec); goto done; 1833 // } 1834 // done: 1835 1836 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1837 Register mdp, Register reg2, 1838 bool is_virtual_call) { 1839 assert(ProfileInterpreter, "must be profiling"); 1840 Label done; 1841 1842 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1843 1844 bind (done); 1845 } 1846 1847 void InterpreterMacroAssembler::profile_ret(Register return_bci, 1848 Register mdp) { 1849 if (ProfileInterpreter) { 1850 Label profile_continue; 1851 uint row; 1852 1853 // If no method data exists, go to profile_continue. 1854 test_method_data_pointer(mdp, profile_continue); 1855 1856 // Update the total ret count. 1857 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1858 1859 for (row = 0; row < RetData::row_limit(); row++) { 1860 Label next_test; 1861 1862 // See if return_bci is equal to bci[n]: 1863 test_mdp_data_at(mdp, 1864 in_bytes(RetData::bci_offset(row)), 1865 return_bci, noreg, 1866 next_test); 1867 1868 // return_bci is equal to bci[n]. Increment the count. 1869 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1870 1871 // The method data pointer needs to be updated to reflect the new target. 1872 update_mdp_by_offset(mdp, 1873 in_bytes(RetData::bci_displacement_offset(row))); 1874 jmp(profile_continue); 1875 bind(next_test); 1876 } 1877 1878 update_mdp_for_ret(return_bci); 1879 1880 bind(profile_continue); 1881 } 1882 } 1883 1884 1885 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1886 if (ProfileInterpreter) { 1887 Label profile_continue; 1888 1889 // If no method data exists, go to profile_continue. 1890 test_method_data_pointer(mdp, profile_continue); 1891 1892 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1893 1894 // The method data pointer needs to be updated. 1895 int mdp_delta = in_bytes(BitData::bit_data_size()); 1896 if (TypeProfileCasts) { 1897 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1898 } 1899 update_mdp_by_constant(mdp, mdp_delta); 1900 1901 bind(profile_continue); 1902 } 1903 } 1904 1905 1906 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1907 if (ProfileInterpreter && TypeProfileCasts) { 1908 Label profile_continue; 1909 1910 // If no method data exists, go to profile_continue. 1911 test_method_data_pointer(mdp, profile_continue); 1912 1913 int count_offset = in_bytes(CounterData::count_offset()); 1914 // Back up the address, since we have already bumped the mdp. 1915 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1916 1917 // *Decrement* the counter. We expect to see zero or small negatives. 1918 increment_mdp_data_at(mdp, count_offset, true); 1919 1920 bind (profile_continue); 1921 } 1922 } 1923 1924 1925 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { 1926 if (ProfileInterpreter) { 1927 Label profile_continue; 1928 1929 // If no method data exists, go to profile_continue. 1930 test_method_data_pointer(mdp, profile_continue); 1931 1932 // The method data pointer needs to be updated. 1933 int mdp_delta = in_bytes(BitData::bit_data_size()); 1934 if (TypeProfileCasts) { 1935 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1936 1937 // Record the object type. 1938 record_klass_in_profile(klass, mdp, reg2, false); 1939 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");) 1940 NOT_LP64(restore_locals();) // Restore EDI 1941 } 1942 update_mdp_by_constant(mdp, mdp_delta); 1943 1944 bind(profile_continue); 1945 } 1946 } 1947 1948 1949 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1950 if (ProfileInterpreter) { 1951 Label profile_continue; 1952 1953 // If no method data exists, go to profile_continue. 1954 test_method_data_pointer(mdp, profile_continue); 1955 1956 // Update the default case count 1957 increment_mdp_data_at(mdp, 1958 in_bytes(MultiBranchData::default_count_offset())); 1959 1960 // The method data pointer needs to be updated. 1961 update_mdp_by_offset(mdp, 1962 in_bytes(MultiBranchData:: 1963 default_displacement_offset())); 1964 1965 bind(profile_continue); 1966 } 1967 } 1968 1969 1970 void InterpreterMacroAssembler::profile_switch_case(Register index, 1971 Register mdp, 1972 Register reg2) { 1973 if (ProfileInterpreter) { 1974 Label profile_continue; 1975 1976 // If no method data exists, go to profile_continue. 1977 test_method_data_pointer(mdp, profile_continue); 1978 1979 // Build the base (index * per_case_size_in_bytes()) + 1980 // case_array_offset_in_bytes() 1981 movl(reg2, in_bytes(MultiBranchData::per_case_size())); 1982 imulptr(index, reg2); // XXX l ? 1983 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? 1984 1985 // Update the case count 1986 increment_mdp_data_at(mdp, 1987 index, 1988 in_bytes(MultiBranchData::relative_count_offset())); 1989 1990 // The method data pointer needs to be updated. 1991 update_mdp_by_offset(mdp, 1992 index, 1993 in_bytes(MultiBranchData:: 1994 relative_displacement_offset())); 1995 1996 bind(profile_continue); 1997 } 1998 } 1999 2000 void InterpreterMacroAssembler::profile_array(Register mdp, 2001 Register array, 2002 Register tmp) { 2003 if (ProfileInterpreter) { 2004 Label profile_continue; 2005 2006 // If no method data exists, go to profile_continue. 2007 test_method_data_pointer(mdp, profile_continue); 2008 2009 mov(tmp, array); 2010 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadStoreData::array_offset()))); 2011 2012 Label not_flat; 2013 test_non_flattened_array_oop(array, tmp, not_flat); 2014 2015 set_mdp_flag_at(mdp, ArrayLoadStoreData::flat_array_byte_constant()); 2016 2017 bind(not_flat); 2018 2019 Label not_null_free; 2020 test_non_null_free_array_oop(array, tmp, not_null_free); 2021 2022 set_mdp_flag_at(mdp, ArrayLoadStoreData::null_free_array_byte_constant()); 2023 2024 bind(not_null_free); 2025 2026 bind(profile_continue); 2027 } 2028 } 2029 2030 void InterpreterMacroAssembler::profile_element(Register mdp, 2031 Register element, 2032 Register tmp) { 2033 if (ProfileInterpreter) { 2034 Label profile_continue; 2035 2036 // If no method data exists, go to profile_continue. 2037 test_method_data_pointer(mdp, profile_continue); 2038 2039 mov(tmp, element); 2040 profile_obj_type(tmp, Address(mdp, in_bytes(ArrayLoadStoreData::element_offset()))); 2041 2042 // The method data pointer needs to be updated. 2043 update_mdp_by_constant(mdp, in_bytes(ArrayLoadStoreData::array_load_store_data_size())); 2044 2045 bind(profile_continue); 2046 } 2047 } 2048 2049 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 2050 if (state == atos) { 2051 MacroAssembler::verify_oop(reg); 2052 } 2053 } 2054 2055 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 2056 #ifndef _LP64 2057 if ((state == ftos && UseSSE < 1) || 2058 (state == dtos && UseSSE < 2)) { 2059 MacroAssembler::verify_FPU(stack_depth); 2060 } 2061 #endif 2062 } 2063 2064 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. 2065 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 2066 int increment, Address mask, 2067 Register scratch, bool preloaded, 2068 Condition cond, Label* where) { 2069 if (!preloaded) { 2070 movl(scratch, counter_addr); 2071 } 2072 incrementl(scratch, increment); 2073 movl(counter_addr, scratch); 2074 andl(scratch, mask); 2075 if (where != NULL) { 2076 jcc(cond, *where); 2077 } 2078 } 2079 2080 void InterpreterMacroAssembler::notify_method_entry() { 2081 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 2082 // track stack depth. If it is possible to enter interp_only_mode we add 2083 // the code to check if the event should be sent. 2084 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 2085 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 2086 if (JvmtiExport::can_post_interpreter_events()) { 2087 Label L; 2088 NOT_LP64(get_thread(rthread);) 2089 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 2090 testl(rdx, rdx); 2091 jcc(Assembler::zero, L); 2092 call_VM(noreg, CAST_FROM_FN_PTR(address, 2093 InterpreterRuntime::post_method_entry)); 2094 bind(L); 2095 } 2096 2097 { 2098 SkipIfEqual skip(this, &DTraceMethodProbes, false); 2099 NOT_LP64(get_thread(rthread);) 2100 get_method(rarg); 2101 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), 2102 rthread, rarg); 2103 } 2104 2105 // RedefineClasses() tracing support for obsolete method entry 2106 if (log_is_enabled(Trace, redefine, class, obsolete)) { 2107 NOT_LP64(get_thread(rthread);) 2108 get_method(rarg); 2109 call_VM_leaf( 2110 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 2111 rthread, rarg); 2112 } 2113 } 2114 2115 2116 void InterpreterMacroAssembler::notify_method_exit( 2117 TosState state, NotifyMethodExitMode mode) { 2118 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 2119 // track stack depth. If it is possible to enter interp_only_mode we add 2120 // the code to check if the event should be sent. 2121 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 2122 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 2123 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 2124 Label L; 2125 // Note: frame::interpreter_frame_result has a dependency on how the 2126 // method result is saved across the call to post_method_exit. If this 2127 // is changed then the interpreter_frame_result implementation will 2128 // need to be updated too. 2129 2130 // template interpreter will leave the result on the top of the stack. 2131 push(state); 2132 NOT_LP64(get_thread(rthread);) 2133 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 2134 testl(rdx, rdx); 2135 jcc(Assembler::zero, L); 2136 call_VM(noreg, 2137 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 2138 bind(L); 2139 pop(state); 2140 } 2141 2142 { 2143 SkipIfEqual skip(this, &DTraceMethodProbes, false); 2144 push(state); 2145 NOT_LP64(get_thread(rthread);) 2146 get_method(rarg); 2147 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 2148 rthread, rarg); 2149 pop(state); 2150 } 2151 }