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