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