1 /* 2 * Copyright (c) 1997, 2017, 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 qtos: // fall through 348 case atos: movptr(rax, oop_addr); 349 movptr(oop_addr, (int32_t)NULL_WORD); 350 verify_oop(rax, state); break; 351 case ltos: movptr(rax, val_addr); break; 352 case btos: // fall through 353 case ztos: // fall through 354 case ctos: // fall through 355 case stos: // fall through 356 case itos: movl(rax, val_addr); break; 357 case ftos: load_float(val_addr); break; 358 case dtos: load_double(val_addr); break; 359 case vtos: /* nothing to do */ break; 360 default : ShouldNotReachHere(); 361 } 362 // Clean up tos value in the thread object 363 movl(tos_addr, (int) ilgl); 364 movl(val_addr, (int32_t) NULL_WORD); 365 #else 366 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() 367 + in_ByteSize(wordSize)); 368 switch (state) { 369 case qtos: // fall through 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) { 506 assert_different_registers(result, index); 507 // convert from field index to resolved_references() index and from 508 // word index to byte offset. Since this is a java object, it can be compressed 509 Register tmp = index; // reuse 510 shll(tmp, LogBytesPerHeapOop); 511 512 get_constant_pool(result); 513 // load pointer for resolved_references[] objArray 514 movptr(result, Address(result, ConstantPool::cache_offset_in_bytes())); 515 movptr(result, Address(result, ConstantPoolCache::resolved_references_offset_in_bytes())); 516 // JNIHandles::resolve(obj); 517 movptr(result, Address(result, 0)); 518 // Add in the index 519 addptr(result, tmp); 520 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 521 } 522 523 // load cpool->resolved_klass_at(index) 524 void InterpreterMacroAssembler::load_resolved_klass_at_index(Register cpool, 525 Register index, Register klass) { 526 movw(index, Address(cpool, index, Address::times_ptr, sizeof(ConstantPool))); 527 Register resolved_klasses = cpool; 528 movptr(resolved_klasses, Address(cpool, ConstantPool::resolved_klasses_offset_in_bytes())); 529 movptr(klass, Address(resolved_klasses, index, Address::times_ptr, Array<Klass*>::base_offset_in_bytes())); 530 } 531 532 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a 533 // subtype of super_klass. 534 // 535 // Args: 536 // rax: superklass 537 // Rsub_klass: subklass 538 // 539 // Kills: 540 // rcx, rdi 541 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, 542 Label& ok_is_subtype) { 543 assert(Rsub_klass != rax, "rax holds superklass"); 544 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");) 545 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");) 546 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); 547 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); 548 549 // Profile the not-null value's klass. 550 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 551 552 // Do the check. 553 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 554 555 // Profile the failure of the check. 556 profile_typecheck_failed(rcx); // blows rcx 557 } 558 559 560 #ifndef _LP64 561 void InterpreterMacroAssembler::f2ieee() { 562 if (IEEEPrecision) { 563 fstp_s(Address(rsp, 0)); 564 fld_s(Address(rsp, 0)); 565 } 566 } 567 568 569 void InterpreterMacroAssembler::d2ieee() { 570 if (IEEEPrecision) { 571 fstp_d(Address(rsp, 0)); 572 fld_d(Address(rsp, 0)); 573 } 574 } 575 #endif // _LP64 576 577 // Java Expression Stack 578 579 void InterpreterMacroAssembler::pop_ptr(Register r) { 580 pop(r); 581 } 582 583 void InterpreterMacroAssembler::push_ptr(Register r) { 584 push(r); 585 } 586 587 void InterpreterMacroAssembler::push_i(Register r) { 588 push(r); 589 } 590 591 void InterpreterMacroAssembler::push_f(XMMRegister r) { 592 subptr(rsp, wordSize); 593 movflt(Address(rsp, 0), r); 594 } 595 596 void InterpreterMacroAssembler::pop_f(XMMRegister r) { 597 movflt(r, Address(rsp, 0)); 598 addptr(rsp, wordSize); 599 } 600 601 void InterpreterMacroAssembler::push_d(XMMRegister r) { 602 subptr(rsp, 2 * wordSize); 603 movdbl(Address(rsp, 0), r); 604 } 605 606 void InterpreterMacroAssembler::pop_d(XMMRegister r) { 607 movdbl(r, Address(rsp, 0)); 608 addptr(rsp, 2 * Interpreter::stackElementSize); 609 } 610 611 #ifdef _LP64 612 void InterpreterMacroAssembler::pop_i(Register r) { 613 // XXX can't use pop currently, upper half non clean 614 movl(r, Address(rsp, 0)); 615 addptr(rsp, wordSize); 616 } 617 618 void InterpreterMacroAssembler::pop_l(Register r) { 619 movq(r, Address(rsp, 0)); 620 addptr(rsp, 2 * Interpreter::stackElementSize); 621 } 622 623 void InterpreterMacroAssembler::push_l(Register r) { 624 subptr(rsp, 2 * wordSize); 625 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(0)), r ); 626 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(1)), NULL_WORD ); 627 } 628 629 void InterpreterMacroAssembler::pop(TosState state) { 630 switch (state) { 631 case qtos: // Fall through 632 case atos: pop_ptr(); break; 633 case btos: 634 case ztos: 635 case ctos: 636 case stos: 637 case itos: pop_i(); break; 638 case ltos: pop_l(); break; 639 case ftos: pop_f(xmm0); break; 640 case dtos: pop_d(xmm0); break; 641 case vtos: /* nothing to do */ break; 642 default: ShouldNotReachHere(); 643 } 644 verify_oop(rax, state); 645 } 646 647 void InterpreterMacroAssembler::push(TosState state) { 648 verify_oop(rax, state); 649 switch (state) { 650 case qtos: // Fall through 651 case atos: push_ptr(); break; 652 case btos: 653 case ztos: 654 case ctos: 655 case stos: 656 case itos: push_i(); break; 657 case ltos: push_l(); break; 658 case ftos: push_f(xmm0); break; 659 case dtos: push_d(xmm0); break; 660 case vtos: /* nothing to do */ break; 661 default : ShouldNotReachHere(); 662 } 663 } 664 #else 665 void InterpreterMacroAssembler::pop_i(Register r) { 666 pop(r); 667 } 668 669 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 670 pop(lo); 671 pop(hi); 672 } 673 674 void InterpreterMacroAssembler::pop_f() { 675 fld_s(Address(rsp, 0)); 676 addptr(rsp, 1 * wordSize); 677 } 678 679 void InterpreterMacroAssembler::pop_d() { 680 fld_d(Address(rsp, 0)); 681 addptr(rsp, 2 * wordSize); 682 } 683 684 685 void InterpreterMacroAssembler::pop(TosState state) { 686 switch (state) { 687 case qtos: // fall through 688 case atos: pop_ptr(rax); break; 689 case btos: // fall through 690 case ztos: // fall through 691 case ctos: // fall through 692 case stos: // fall through 693 case itos: pop_i(rax); break; 694 case ltos: pop_l(rax, rdx); break; 695 case ftos: 696 if (UseSSE >= 1) { 697 pop_f(xmm0); 698 } else { 699 pop_f(); 700 } 701 break; 702 case dtos: 703 if (UseSSE >= 2) { 704 pop_d(xmm0); 705 } else { 706 pop_d(); 707 } 708 break; 709 case vtos: /* nothing to do */ break; 710 default : ShouldNotReachHere(); 711 } 712 verify_oop(rax, state); 713 } 714 715 716 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 717 push(hi); 718 push(lo); 719 } 720 721 void InterpreterMacroAssembler::push_f() { 722 // Do not schedule for no AGI! Never write beyond rsp! 723 subptr(rsp, 1 * wordSize); 724 fstp_s(Address(rsp, 0)); 725 } 726 727 void InterpreterMacroAssembler::push_d() { 728 // Do not schedule for no AGI! Never write beyond rsp! 729 subptr(rsp, 2 * wordSize); 730 fstp_d(Address(rsp, 0)); 731 } 732 733 734 void InterpreterMacroAssembler::push(TosState state) { 735 verify_oop(rax, state); 736 switch (state) { 737 case qtos: // fall through 738 case atos: push_ptr(rax); break; 739 case btos: // fall through 740 case ztos: // fall through 741 case ctos: // fall through 742 case stos: // fall through 743 case itos: push_i(rax); break; 744 case ltos: push_l(rax, rdx); break; 745 case ftos: 746 if (UseSSE >= 1) { 747 push_f(xmm0); 748 } else { 749 push_f(); 750 } 751 break; 752 case dtos: 753 if (UseSSE >= 2) { 754 push_d(xmm0); 755 } else { 756 push_d(); 757 } 758 break; 759 case vtos: /* nothing to do */ break; 760 default : ShouldNotReachHere(); 761 } 762 } 763 #endif // _LP64 764 765 766 // Helpers for swap and dup 767 void InterpreterMacroAssembler::load_ptr(int n, Register val) { 768 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 769 } 770 771 void InterpreterMacroAssembler::store_ptr(int n, Register val) { 772 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 773 } 774 775 776 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 777 // set sender sp 778 lea(_bcp_register, Address(rsp, wordSize)); 779 // record last_sp 780 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register); 781 } 782 783 784 // Jump to from_interpreted entry of a call unless single stepping is possible 785 // in this thread in which case we must call the i2i entry 786 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 787 prepare_to_jump_from_interpreted(); 788 789 if (JvmtiExport::can_post_interpreter_events()) { 790 Label run_compiled_code; 791 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 792 // compiled code in threads for which the event is enabled. Check here for 793 // interp_only_mode if these events CAN be enabled. 794 // interp_only is an int, on little endian it is sufficient to test the byte only 795 // Is a cmpl faster? 796 LP64_ONLY(temp = r15_thread;) 797 NOT_LP64(get_thread(temp);) 798 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 799 jccb(Assembler::zero, run_compiled_code); 800 jmp(Address(method, Method::interpreter_entry_offset())); 801 bind(run_compiled_code); 802 } 803 804 jmp(Address(method, Method::from_interpreted_offset())); 805 } 806 807 // The following two routines provide a hook so that an implementation 808 // can schedule the dispatch in two parts. x86 does not do this. 809 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 810 // Nothing x86 specific to be done here 811 } 812 813 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 814 dispatch_next(state, step); 815 } 816 817 void InterpreterMacroAssembler::dispatch_base(TosState state, 818 address* table, 819 bool verifyoop) { 820 verify_FPU(1, state); 821 if (VerifyActivationFrameSize) { 822 Label L; 823 mov(rcx, rbp); 824 subptr(rcx, rsp); 825 int32_t min_frame_size = 826 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * 827 wordSize; 828 cmpptr(rcx, (int32_t)min_frame_size); 829 jcc(Assembler::greaterEqual, L); 830 stop("broken stack frame"); 831 bind(L); 832 } 833 if (verifyoop) { 834 verify_oop(rax, state); 835 } 836 #ifdef _LP64 837 lea(rscratch1, ExternalAddress((address)table)); 838 jmp(Address(rscratch1, rbx, Address::times_8)); 839 #else 840 Address index(noreg, rbx, Address::times_ptr); 841 ExternalAddress tbl((address)table); 842 ArrayAddress dispatch(tbl, index); 843 jump(dispatch); 844 #endif // _LP64 845 } 846 847 void InterpreterMacroAssembler::dispatch_only(TosState state) { 848 dispatch_base(state, Interpreter::dispatch_table(state)); 849 } 850 851 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 852 dispatch_base(state, Interpreter::normal_table(state)); 853 } 854 855 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 856 dispatch_base(state, Interpreter::normal_table(state), false); 857 } 858 859 860 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { 861 // load next bytecode (load before advancing _bcp_register to prevent AGI) 862 load_unsigned_byte(rbx, Address(_bcp_register, step)); 863 // advance _bcp_register 864 increment(_bcp_register, step); 865 dispatch_base(state, Interpreter::dispatch_table(state)); 866 } 867 868 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 869 // load current bytecode 870 load_unsigned_byte(rbx, Address(_bcp_register, 0)); 871 dispatch_base(state, table); 872 } 873 874 void InterpreterMacroAssembler::narrow(Register result) { 875 876 // Get method->_constMethod->_result_type 877 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 878 movptr(rcx, Address(rcx, Method::const_offset())); 879 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset())); 880 881 Label done, notBool, notByte, notChar; 882 883 // common case first 884 cmpl(rcx, T_INT); 885 jcc(Assembler::equal, done); 886 887 // mask integer result to narrower return type. 888 cmpl(rcx, T_BOOLEAN); 889 jcc(Assembler::notEqual, notBool); 890 andl(result, 0x1); 891 jmp(done); 892 893 bind(notBool); 894 cmpl(rcx, T_BYTE); 895 jcc(Assembler::notEqual, notByte); 896 LP64_ONLY(movsbl(result, result);) 897 NOT_LP64(shll(result, 24);) // truncate upper 24 bits 898 NOT_LP64(sarl(result, 24);) // and sign-extend byte 899 jmp(done); 900 901 bind(notByte); 902 cmpl(rcx, T_CHAR); 903 jcc(Assembler::notEqual, notChar); 904 LP64_ONLY(movzwl(result, result);) 905 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits 906 jmp(done); 907 908 bind(notChar); 909 // cmpl(rcx, T_SHORT); // all that's left 910 // jcc(Assembler::notEqual, done); 911 LP64_ONLY(movswl(result, result);) 912 NOT_LP64(shll(result, 16);) // truncate upper 16 bits 913 NOT_LP64(sarl(result, 16);) // and sign-extend short 914 915 // Nothing to do for T_INT 916 bind(done); 917 } 918 919 // remove activation 920 // 921 // Unlock the receiver if this is a synchronized method. 922 // Unlock any Java monitors from syncronized blocks. 923 // Remove the activation from the stack. 924 // 925 // If there are locked Java monitors 926 // If throw_monitor_exception 927 // throws IllegalMonitorStateException 928 // Else if install_monitor_exception 929 // installs IllegalMonitorStateException 930 // Else 931 // no error processing 932 void InterpreterMacroAssembler::remove_activation( 933 TosState state, 934 Register ret_addr, 935 bool throw_monitor_exception, 936 bool install_monitor_exception, 937 bool notify_jvmdi) { 938 // Note: Registers rdx xmm0 may be in use for the 939 // result check if synchronized method 940 Label unlocked, unlock, no_unlock; 941 942 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 943 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 944 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 945 // monitor pointers need different register 946 // because rdx may have the result in it 947 NOT_LP64(get_thread(rcx);) 948 949 // get the value of _do_not_unlock_if_synchronized into rdx 950 const Address do_not_unlock_if_synchronized(rthread, 951 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 952 movbool(rbx, do_not_unlock_if_synchronized); 953 movbool(do_not_unlock_if_synchronized, false); // reset the flag 954 955 // get method access flags 956 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 957 movl(rcx, Address(rcx, Method::access_flags_offset())); 958 testl(rcx, JVM_ACC_SYNCHRONIZED); 959 jcc(Assembler::zero, unlocked); 960 961 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 962 // is set. 963 testbool(rbx); 964 jcc(Assembler::notZero, no_unlock); 965 966 // unlock monitor 967 push(state); // save result 968 969 // BasicObjectLock will be first in list, since this is a 970 // synchronized method. However, need to check that the object has 971 // not been unlocked by an explicit monitorexit bytecode. 972 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * 973 wordSize - (int) sizeof(BasicObjectLock)); 974 // We use c_rarg1/rdx so that if we go slow path it will be the correct 975 // register for unlock_object to pass to VM directly 976 lea(robj, monitor); // address of first monitor 977 978 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes())); 979 testptr(rax, rax); 980 jcc(Assembler::notZero, unlock); 981 982 pop(state); 983 if (throw_monitor_exception) { 984 // Entry already unlocked, need to throw exception 985 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow 986 call_VM(noreg, CAST_FROM_FN_PTR(address, 987 InterpreterRuntime::throw_illegal_monitor_state_exception)); 988 should_not_reach_here(); 989 } else { 990 // Monitor already unlocked during a stack unroll. If requested, 991 // install an illegal_monitor_state_exception. Continue with 992 // stack unrolling. 993 if (install_monitor_exception) { 994 NOT_LP64(empty_FPU_stack();) 995 call_VM(noreg, CAST_FROM_FN_PTR(address, 996 InterpreterRuntime::new_illegal_monitor_state_exception)); 997 } 998 jmp(unlocked); 999 } 1000 1001 bind(unlock); 1002 unlock_object(robj); 1003 pop(state); 1004 1005 // Check that for block-structured locking (i.e., that all locked 1006 // objects has been unlocked) 1007 bind(unlocked); 1008 1009 // rax, rdx: Might contain return value 1010 1011 // Check that all monitors are unlocked 1012 { 1013 Label loop, exception, entry, restart; 1014 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 1015 const Address monitor_block_top( 1016 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 1017 const Address monitor_block_bot( 1018 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 1019 1020 bind(restart); 1021 // We use c_rarg1 so that if we go slow path it will be the correct 1022 // register for unlock_object to pass to VM directly 1023 movptr(rmon, monitor_block_top); // points to current entry, starting 1024 // with top-most entry 1025 lea(rbx, monitor_block_bot); // points to word before bottom of 1026 // monitor block 1027 jmp(entry); 1028 1029 // Entry already locked, need to throw exception 1030 bind(exception); 1031 1032 if (throw_monitor_exception) { 1033 // Throw exception 1034 NOT_LP64(empty_FPU_stack();) 1035 MacroAssembler::call_VM(noreg, 1036 CAST_FROM_FN_PTR(address, InterpreterRuntime:: 1037 throw_illegal_monitor_state_exception)); 1038 should_not_reach_here(); 1039 } else { 1040 // Stack unrolling. Unlock object and install illegal_monitor_exception. 1041 // Unlock does not block, so don't have to worry about the frame. 1042 // We don't have to preserve c_rarg1 since we are going to throw an exception. 1043 1044 push(state); 1045 mov(robj, rmon); // nop if robj and rmon are the same 1046 unlock_object(robj); 1047 pop(state); 1048 1049 if (install_monitor_exception) { 1050 NOT_LP64(empty_FPU_stack();) 1051 call_VM(noreg, CAST_FROM_FN_PTR(address, 1052 InterpreterRuntime:: 1053 new_illegal_monitor_state_exception)); 1054 } 1055 1056 jmp(restart); 1057 } 1058 1059 bind(loop); 1060 // check if current entry is used 1061 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); 1062 jcc(Assembler::notEqual, exception); 1063 1064 addptr(rmon, entry_size); // otherwise advance to next entry 1065 bind(entry); 1066 cmpptr(rmon, rbx); // check if bottom reached 1067 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 1068 } 1069 1070 bind(no_unlock); 1071 1072 // jvmti support 1073 if (notify_jvmdi) { 1074 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 1075 } else { 1076 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 1077 } 1078 1079 // remove activation 1080 // get sender sp 1081 movptr(rbx, 1082 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1083 if (StackReservedPages > 0) { 1084 // testing if reserved zone needs to be re-enabled 1085 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1086 Label no_reserved_zone_enabling; 1087 1088 NOT_LP64(get_thread(rthread);) 1089 1090 cmpl(Address(rthread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_enabled); 1091 jcc(Assembler::equal, no_reserved_zone_enabling); 1092 1093 cmpptr(rbx, Address(rthread, JavaThread::reserved_stack_activation_offset())); 1094 jcc(Assembler::lessEqual, no_reserved_zone_enabling); 1095 1096 call_VM_leaf( 1097 CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), rthread); 1098 push(rthread); 1099 call_VM(noreg, CAST_FROM_FN_PTR(address, 1100 InterpreterRuntime::throw_delayed_StackOverflowError)); 1101 should_not_reach_here(); 1102 1103 bind(no_reserved_zone_enabling); 1104 } 1105 leave(); // remove frame anchor 1106 pop(ret_addr); // get return address 1107 mov(rsp, rbx); // set sp to sender sp 1108 } 1109 1110 void InterpreterMacroAssembler::get_method_counters(Register method, 1111 Register mcs, Label& skip) { 1112 Label has_counters; 1113 movptr(mcs, Address(method, Method::method_counters_offset())); 1114 testptr(mcs, mcs); 1115 jcc(Assembler::notZero, has_counters); 1116 call_VM(noreg, CAST_FROM_FN_PTR(address, 1117 InterpreterRuntime::build_method_counters), method); 1118 movptr(mcs, Address(method,Method::method_counters_offset())); 1119 testptr(mcs, mcs); 1120 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory 1121 bind(has_counters); 1122 } 1123 1124 1125 // Lock object 1126 // 1127 // Args: 1128 // rdx, c_rarg1: BasicObjectLock to be used for locking 1129 // 1130 // Kills: 1131 // rax, rbx 1132 void InterpreterMacroAssembler::lock_object(Register lock_reg) { 1133 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1134 "The argument is only for looks. It must be c_rarg1"); 1135 1136 if (UseHeavyMonitors) { 1137 call_VM(noreg, 1138 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1139 lock_reg); 1140 } else { 1141 Label done; 1142 1143 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1144 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a 1145 // problematic case where tmp_reg = no_reg. 1146 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1147 1148 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 1149 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 1150 const int mark_offset = lock_offset + 1151 BasicLock::displaced_header_offset_in_bytes(); 1152 1153 Label slow_case; 1154 1155 // Load object pointer into obj_reg 1156 movptr(obj_reg, Address(lock_reg, obj_offset)); 1157 1158 if (UseBiasedLocking) { 1159 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case); 1160 } 1161 1162 // Load immediate 1 into swap_reg %rax 1163 movl(swap_reg, (int32_t)1); 1164 1165 // Load (object->mark() | 1) into swap_reg %rax 1166 orptr(swap_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1167 1168 // Save (object->mark() | 1) into BasicLock's displaced header 1169 movptr(Address(lock_reg, mark_offset), swap_reg); 1170 1171 assert(lock_offset == 0, 1172 "displaced header must be first word in BasicObjectLock"); 1173 1174 if (os::is_MP()) lock(); 1175 cmpxchgptr(lock_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1176 if (PrintBiasedLockingStatistics) { 1177 cond_inc32(Assembler::zero, 1178 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1179 } 1180 jcc(Assembler::zero, done); 1181 1182 const int zero_bits = LP64_ONLY(7) NOT_LP64(3); 1183 1184 // Test if the oopMark is an obvious stack pointer, i.e., 1185 // 1) (mark & zero_bits) == 0, and 1186 // 2) rsp <= mark < mark + os::pagesize() 1187 // 1188 // These 3 tests can be done by evaluating the following 1189 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())), 1190 // assuming both stack pointer and pagesize have their 1191 // least significant bits clear. 1192 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg 1193 subptr(swap_reg, rsp); 1194 andptr(swap_reg, zero_bits - os::vm_page_size()); 1195 1196 // Save the test result, for recursive case, the result is zero 1197 movptr(Address(lock_reg, mark_offset), swap_reg); 1198 1199 if (PrintBiasedLockingStatistics) { 1200 cond_inc32(Assembler::zero, 1201 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1202 } 1203 jcc(Assembler::zero, done); 1204 1205 bind(slow_case); 1206 1207 // Call the runtime routine for slow case 1208 call_VM(noreg, 1209 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1210 lock_reg); 1211 1212 bind(done); 1213 } 1214 } 1215 1216 1217 // Unlocks an object. Used in monitorexit bytecode and 1218 // remove_activation. Throws an IllegalMonitorException if object is 1219 // not locked by current thread. 1220 // 1221 // Args: 1222 // rdx, c_rarg1: BasicObjectLock for lock 1223 // 1224 // Kills: 1225 // rax 1226 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) 1227 // rscratch1 (scratch reg) 1228 // rax, rbx, rcx, rdx 1229 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 1230 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1231 "The argument is only for looks. It must be c_rarg1"); 1232 1233 if (UseHeavyMonitors) { 1234 call_VM(noreg, 1235 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1236 lock_reg); 1237 } else { 1238 Label done; 1239 1240 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1241 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark 1242 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1243 1244 save_bcp(); // Save in case of exception 1245 1246 // Convert from BasicObjectLock structure to object and BasicLock 1247 // structure Store the BasicLock address into %rax 1248 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 1249 1250 // Load oop into obj_reg(%c_rarg3) 1251 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); 1252 1253 // Free entry 1254 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); 1255 1256 if (UseBiasedLocking) { 1257 biased_locking_exit(obj_reg, header_reg, done); 1258 } 1259 1260 // Load the old header from BasicLock structure 1261 movptr(header_reg, Address(swap_reg, 1262 BasicLock::displaced_header_offset_in_bytes())); 1263 1264 // Test for recursion 1265 testptr(header_reg, header_reg); 1266 1267 // zero for recursive case 1268 jcc(Assembler::zero, done); 1269 1270 // Atomic swap back the old header 1271 if (os::is_MP()) lock(); 1272 cmpxchgptr(header_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes())); 1273 1274 // zero for simple unlock of a stack-lock case 1275 jcc(Assembler::zero, done); 1276 1277 // Call the runtime routine for slow case. 1278 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), 1279 obj_reg); // restore obj 1280 call_VM(noreg, 1281 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1282 lock_reg); 1283 1284 bind(done); 1285 1286 restore_bcp(); 1287 } 1288 } 1289 1290 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, 1291 Label& zero_continue) { 1292 assert(ProfileInterpreter, "must be profiling interpreter"); 1293 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize)); 1294 testptr(mdp, mdp); 1295 jcc(Assembler::zero, zero_continue); 1296 } 1297 1298 1299 // Set the method data pointer for the current bcp. 1300 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1301 assert(ProfileInterpreter, "must be profiling interpreter"); 1302 Label set_mdp; 1303 push(rax); 1304 push(rbx); 1305 1306 get_method(rbx); 1307 // Test MDO to avoid the call if it is NULL. 1308 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 1309 testptr(rax, rax); 1310 jcc(Assembler::zero, set_mdp); 1311 // rbx: method 1312 // _bcp_register: bcp 1313 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register); 1314 // rax: mdi 1315 // mdo is guaranteed to be non-zero here, we checked for it before the call. 1316 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 1317 addptr(rbx, in_bytes(MethodData::data_offset())); 1318 addptr(rax, rbx); 1319 bind(set_mdp); 1320 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax); 1321 pop(rbx); 1322 pop(rax); 1323 } 1324 1325 void InterpreterMacroAssembler::verify_method_data_pointer() { 1326 assert(ProfileInterpreter, "must be profiling interpreter"); 1327 #ifdef ASSERT 1328 Label verify_continue; 1329 push(rax); 1330 push(rbx); 1331 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 1332 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 1333 push(arg3_reg); 1334 push(arg2_reg); 1335 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue 1336 get_method(rbx); 1337 1338 // If the mdp is valid, it will point to a DataLayout header which is 1339 // consistent with the bcp. The converse is highly probable also. 1340 load_unsigned_short(arg2_reg, 1341 Address(arg3_reg, in_bytes(DataLayout::bci_offset()))); 1342 addptr(arg2_reg, Address(rbx, Method::const_offset())); 1343 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset())); 1344 cmpptr(arg2_reg, _bcp_register); 1345 jcc(Assembler::equal, verify_continue); 1346 // rbx: method 1347 // _bcp_register: bcp 1348 // c_rarg3: mdp 1349 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), 1350 rbx, _bcp_register, arg3_reg); 1351 bind(verify_continue); 1352 pop(arg2_reg); 1353 pop(arg3_reg); 1354 pop(rbx); 1355 pop(rax); 1356 #endif // ASSERT 1357 } 1358 1359 1360 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, 1361 int constant, 1362 Register value) { 1363 assert(ProfileInterpreter, "must be profiling interpreter"); 1364 Address data(mdp_in, constant); 1365 movptr(data, value); 1366 } 1367 1368 1369 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1370 int constant, 1371 bool decrement) { 1372 // Counter address 1373 Address data(mdp_in, constant); 1374 1375 increment_mdp_data_at(data, decrement); 1376 } 1377 1378 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 1379 bool decrement) { 1380 assert(ProfileInterpreter, "must be profiling interpreter"); 1381 // %%% this does 64bit counters at best it is wasting space 1382 // at worst it is a rare bug when counters overflow 1383 1384 if (decrement) { 1385 // Decrement the register. Set condition codes. 1386 addptr(data, (int32_t) -DataLayout::counter_increment); 1387 // If the decrement causes the counter to overflow, stay negative 1388 Label L; 1389 jcc(Assembler::negative, L); 1390 addptr(data, (int32_t) DataLayout::counter_increment); 1391 bind(L); 1392 } else { 1393 assert(DataLayout::counter_increment == 1, 1394 "flow-free idiom only works with 1"); 1395 // Increment the register. Set carry flag. 1396 addptr(data, DataLayout::counter_increment); 1397 // If the increment causes the counter to overflow, pull back by 1. 1398 sbbptr(data, (int32_t)0); 1399 } 1400 } 1401 1402 1403 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1404 Register reg, 1405 int constant, 1406 bool decrement) { 1407 Address data(mdp_in, reg, Address::times_1, constant); 1408 1409 increment_mdp_data_at(data, decrement); 1410 } 1411 1412 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, 1413 int flag_byte_constant) { 1414 assert(ProfileInterpreter, "must be profiling interpreter"); 1415 int header_offset = in_bytes(DataLayout::header_offset()); 1416 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); 1417 // Set the flag 1418 orl(Address(mdp_in, header_offset), header_bits); 1419 } 1420 1421 1422 1423 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 1424 int offset, 1425 Register value, 1426 Register test_value_out, 1427 Label& not_equal_continue) { 1428 assert(ProfileInterpreter, "must be profiling interpreter"); 1429 if (test_value_out == noreg) { 1430 cmpptr(value, Address(mdp_in, offset)); 1431 } else { 1432 // Put the test value into a register, so caller can use it: 1433 movptr(test_value_out, Address(mdp_in, offset)); 1434 cmpptr(test_value_out, value); 1435 } 1436 jcc(Assembler::notEqual, not_equal_continue); 1437 } 1438 1439 1440 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1441 int offset_of_disp) { 1442 assert(ProfileInterpreter, "must be profiling interpreter"); 1443 Address disp_address(mdp_in, offset_of_disp); 1444 addptr(mdp_in, disp_address); 1445 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1446 } 1447 1448 1449 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1450 Register reg, 1451 int offset_of_disp) { 1452 assert(ProfileInterpreter, "must be profiling interpreter"); 1453 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 1454 addptr(mdp_in, disp_address); 1455 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1456 } 1457 1458 1459 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, 1460 int constant) { 1461 assert(ProfileInterpreter, "must be profiling interpreter"); 1462 addptr(mdp_in, constant); 1463 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1464 } 1465 1466 1467 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 1468 assert(ProfileInterpreter, "must be profiling interpreter"); 1469 push(return_bci); // save/restore across call_VM 1470 call_VM(noreg, 1471 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), 1472 return_bci); 1473 pop(return_bci); 1474 } 1475 1476 1477 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, 1478 Register bumped_count) { 1479 if (ProfileInterpreter) { 1480 Label profile_continue; 1481 1482 // If no method data exists, go to profile_continue. 1483 // Otherwise, assign to mdp 1484 test_method_data_pointer(mdp, profile_continue); 1485 1486 // We are taking a branch. Increment the taken count. 1487 // We inline increment_mdp_data_at to return bumped_count in a register 1488 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1489 Address data(mdp, in_bytes(JumpData::taken_offset())); 1490 movptr(bumped_count, data); 1491 assert(DataLayout::counter_increment == 1, 1492 "flow-free idiom only works with 1"); 1493 addptr(bumped_count, DataLayout::counter_increment); 1494 sbbptr(bumped_count, 0); 1495 movptr(data, bumped_count); // Store back out 1496 1497 // The method data pointer needs to be updated to reflect the new target. 1498 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1499 bind(profile_continue); 1500 } 1501 } 1502 1503 1504 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1505 if (ProfileInterpreter) { 1506 Label profile_continue; 1507 1508 // If no method data exists, go to profile_continue. 1509 test_method_data_pointer(mdp, profile_continue); 1510 1511 // We are taking a branch. Increment the not taken count. 1512 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1513 1514 // The method data pointer needs to be updated to correspond to 1515 // the next bytecode 1516 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1517 bind(profile_continue); 1518 } 1519 } 1520 1521 void InterpreterMacroAssembler::profile_call(Register mdp) { 1522 if (ProfileInterpreter) { 1523 Label profile_continue; 1524 1525 // If no method data exists, go to profile_continue. 1526 test_method_data_pointer(mdp, profile_continue); 1527 1528 // We are making a call. Increment the count. 1529 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1530 1531 // The method data pointer needs to be updated to reflect the new target. 1532 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1533 bind(profile_continue); 1534 } 1535 } 1536 1537 1538 void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1539 if (ProfileInterpreter) { 1540 Label profile_continue; 1541 1542 // If no method data exists, go to profile_continue. 1543 test_method_data_pointer(mdp, profile_continue); 1544 1545 // We are making a call. Increment the count. 1546 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1547 1548 // The method data pointer needs to be updated to reflect the new target. 1549 update_mdp_by_constant(mdp, 1550 in_bytes(VirtualCallData:: 1551 virtual_call_data_size())); 1552 bind(profile_continue); 1553 } 1554 } 1555 1556 1557 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, 1558 Register mdp, 1559 Register reg2, 1560 bool receiver_can_be_null) { 1561 if (ProfileInterpreter) { 1562 Label profile_continue; 1563 1564 // If no method data exists, go to profile_continue. 1565 test_method_data_pointer(mdp, profile_continue); 1566 1567 Label skip_receiver_profile; 1568 if (receiver_can_be_null) { 1569 Label not_null; 1570 testptr(receiver, receiver); 1571 jccb(Assembler::notZero, not_null); 1572 // We are making a call. Increment the count for null receiver. 1573 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1574 jmp(skip_receiver_profile); 1575 bind(not_null); 1576 } 1577 1578 // Record the receiver type. 1579 record_klass_in_profile(receiver, mdp, reg2, true); 1580 bind(skip_receiver_profile); 1581 1582 // The method data pointer needs to be updated to reflect the new target. 1583 #if INCLUDE_JVMCI 1584 if (MethodProfileWidth == 0) { 1585 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1586 } 1587 #else // INCLUDE_JVMCI 1588 update_mdp_by_constant(mdp, 1589 in_bytes(VirtualCallData:: 1590 virtual_call_data_size())); 1591 #endif // INCLUDE_JVMCI 1592 bind(profile_continue); 1593 } 1594 } 1595 1596 #if INCLUDE_JVMCI 1597 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) { 1598 assert_different_registers(method, mdp, reg2); 1599 if (ProfileInterpreter && MethodProfileWidth > 0) { 1600 Label profile_continue; 1601 1602 // If no method data exists, go to profile_continue. 1603 test_method_data_pointer(mdp, profile_continue); 1604 1605 Label done; 1606 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth, 1607 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset())); 1608 bind(done); 1609 1610 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1611 bind(profile_continue); 1612 } 1613 } 1614 #endif // INCLUDE_JVMCI 1615 1616 // This routine creates a state machine for updating the multi-row 1617 // type profile at a virtual call site (or other type-sensitive bytecode). 1618 // The machine visits each row (of receiver/count) until the receiver type 1619 // is found, or until it runs out of rows. At the same time, it remembers 1620 // the location of the first empty row. (An empty row records null for its 1621 // receiver, and can be allocated for a newly-observed receiver type.) 1622 // Because there are two degrees of freedom in the state, a simple linear 1623 // search will not work; it must be a decision tree. Hence this helper 1624 // function is recursive, to generate the required tree structured code. 1625 // It's the interpreter, so we are trading off code space for speed. 1626 // See below for example code. 1627 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1628 Register receiver, Register mdp, 1629 Register reg2, int start_row, 1630 Label& done, bool is_virtual_call) { 1631 if (TypeProfileWidth == 0) { 1632 if (is_virtual_call) { 1633 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1634 } 1635 #if INCLUDE_JVMCI 1636 else if (EnableJVMCI) { 1637 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset())); 1638 } 1639 #endif // INCLUDE_JVMCI 1640 } else { 1641 int non_profiled_offset = -1; 1642 if (is_virtual_call) { 1643 non_profiled_offset = in_bytes(CounterData::count_offset()); 1644 } 1645 #if INCLUDE_JVMCI 1646 else if (EnableJVMCI) { 1647 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()); 1648 } 1649 #endif // INCLUDE_JVMCI 1650 1651 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth, 1652 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset); 1653 } 1654 } 1655 1656 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, 1657 Register reg2, int start_row, Label& done, int total_rows, 1658 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn, 1659 int non_profiled_offset) { 1660 int last_row = total_rows - 1; 1661 assert(start_row <= last_row, "must be work left to do"); 1662 // Test this row for both the item and for null. 1663 // Take any of three different outcomes: 1664 // 1. found item => increment count and goto done 1665 // 2. found null => keep looking for case 1, maybe allocate this cell 1666 // 3. found something else => keep looking for cases 1 and 2 1667 // Case 3 is handled by a recursive call. 1668 for (int row = start_row; row <= last_row; row++) { 1669 Label next_test; 1670 bool test_for_null_also = (row == start_row); 1671 1672 // See if the item is item[n]. 1673 int item_offset = in_bytes(item_offset_fn(row)); 1674 test_mdp_data_at(mdp, item_offset, item, 1675 (test_for_null_also ? reg2 : noreg), 1676 next_test); 1677 // (Reg2 now contains the item from the CallData.) 1678 1679 // The item is item[n]. Increment count[n]. 1680 int count_offset = in_bytes(item_count_offset_fn(row)); 1681 increment_mdp_data_at(mdp, count_offset); 1682 jmp(done); 1683 bind(next_test); 1684 1685 if (test_for_null_also) { 1686 Label found_null; 1687 // Failed the equality check on item[n]... Test for null. 1688 testptr(reg2, reg2); 1689 if (start_row == last_row) { 1690 // The only thing left to do is handle the null case. 1691 if (non_profiled_offset >= 0) { 1692 jccb(Assembler::zero, found_null); 1693 // Item did not match any saved item and there is no empty row for it. 1694 // Increment total counter to indicate polymorphic case. 1695 increment_mdp_data_at(mdp, non_profiled_offset); 1696 jmp(done); 1697 bind(found_null); 1698 } else { 1699 jcc(Assembler::notZero, done); 1700 } 1701 break; 1702 } 1703 // Since null is rare, make it be the branch-taken case. 1704 jcc(Assembler::zero, found_null); 1705 1706 // Put all the "Case 3" tests here. 1707 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows, 1708 item_offset_fn, item_count_offset_fn, non_profiled_offset); 1709 1710 // Found a null. Keep searching for a matching item, 1711 // but remember that this is an empty (unused) slot. 1712 bind(found_null); 1713 } 1714 } 1715 1716 // In the fall-through case, we found no matching item, but we 1717 // observed the item[start_row] is NULL. 1718 1719 // Fill in the item field and increment the count. 1720 int item_offset = in_bytes(item_offset_fn(start_row)); 1721 set_mdp_data_at(mdp, item_offset, item); 1722 int count_offset = in_bytes(item_count_offset_fn(start_row)); 1723 movl(reg2, DataLayout::counter_increment); 1724 set_mdp_data_at(mdp, count_offset, reg2); 1725 if (start_row > 0) { 1726 jmp(done); 1727 } 1728 } 1729 1730 // Example state machine code for three profile rows: 1731 // // main copy of decision tree, rooted at row[1] 1732 // if (row[0].rec == rec) { row[0].incr(); goto done; } 1733 // if (row[0].rec != NULL) { 1734 // // inner copy of decision tree, rooted at row[1] 1735 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1736 // if (row[1].rec != NULL) { 1737 // // degenerate decision tree, rooted at row[2] 1738 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1739 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow 1740 // row[2].init(rec); goto done; 1741 // } else { 1742 // // remember row[1] is empty 1743 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1744 // row[1].init(rec); goto done; 1745 // } 1746 // } else { 1747 // // remember row[0] is empty 1748 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1749 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1750 // row[0].init(rec); goto done; 1751 // } 1752 // done: 1753 1754 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1755 Register mdp, Register reg2, 1756 bool is_virtual_call) { 1757 assert(ProfileInterpreter, "must be profiling"); 1758 Label done; 1759 1760 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1761 1762 bind (done); 1763 } 1764 1765 void InterpreterMacroAssembler::profile_ret(Register return_bci, 1766 Register mdp) { 1767 if (ProfileInterpreter) { 1768 Label profile_continue; 1769 uint row; 1770 1771 // If no method data exists, go to profile_continue. 1772 test_method_data_pointer(mdp, profile_continue); 1773 1774 // Update the total ret count. 1775 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1776 1777 for (row = 0; row < RetData::row_limit(); row++) { 1778 Label next_test; 1779 1780 // See if return_bci is equal to bci[n]: 1781 test_mdp_data_at(mdp, 1782 in_bytes(RetData::bci_offset(row)), 1783 return_bci, noreg, 1784 next_test); 1785 1786 // return_bci is equal to bci[n]. Increment the count. 1787 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1788 1789 // The method data pointer needs to be updated to reflect the new target. 1790 update_mdp_by_offset(mdp, 1791 in_bytes(RetData::bci_displacement_offset(row))); 1792 jmp(profile_continue); 1793 bind(next_test); 1794 } 1795 1796 update_mdp_for_ret(return_bci); 1797 1798 bind(profile_continue); 1799 } 1800 } 1801 1802 1803 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1804 if (ProfileInterpreter) { 1805 Label profile_continue; 1806 1807 // If no method data exists, go to profile_continue. 1808 test_method_data_pointer(mdp, profile_continue); 1809 1810 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1811 1812 // The method data pointer needs to be updated. 1813 int mdp_delta = in_bytes(BitData::bit_data_size()); 1814 if (TypeProfileCasts) { 1815 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1816 } 1817 update_mdp_by_constant(mdp, mdp_delta); 1818 1819 bind(profile_continue); 1820 } 1821 } 1822 1823 1824 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1825 if (ProfileInterpreter && TypeProfileCasts) { 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 int count_offset = in_bytes(CounterData::count_offset()); 1832 // Back up the address, since we have already bumped the mdp. 1833 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1834 1835 // *Decrement* the counter. We expect to see zero or small negatives. 1836 increment_mdp_data_at(mdp, count_offset, true); 1837 1838 bind (profile_continue); 1839 } 1840 } 1841 1842 1843 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { 1844 if (ProfileInterpreter) { 1845 Label profile_continue; 1846 1847 // If no method data exists, go to profile_continue. 1848 test_method_data_pointer(mdp, profile_continue); 1849 1850 // The method data pointer needs to be updated. 1851 int mdp_delta = in_bytes(BitData::bit_data_size()); 1852 if (TypeProfileCasts) { 1853 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1854 1855 // Record the object type. 1856 record_klass_in_profile(klass, mdp, reg2, false); 1857 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");) 1858 NOT_LP64(restore_locals();) // Restore EDI 1859 } 1860 update_mdp_by_constant(mdp, mdp_delta); 1861 1862 bind(profile_continue); 1863 } 1864 } 1865 1866 1867 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1868 if (ProfileInterpreter) { 1869 Label profile_continue; 1870 1871 // If no method data exists, go to profile_continue. 1872 test_method_data_pointer(mdp, profile_continue); 1873 1874 // Update the default case count 1875 increment_mdp_data_at(mdp, 1876 in_bytes(MultiBranchData::default_count_offset())); 1877 1878 // The method data pointer needs to be updated. 1879 update_mdp_by_offset(mdp, 1880 in_bytes(MultiBranchData:: 1881 default_displacement_offset())); 1882 1883 bind(profile_continue); 1884 } 1885 } 1886 1887 1888 void InterpreterMacroAssembler::profile_switch_case(Register index, 1889 Register mdp, 1890 Register reg2) { 1891 if (ProfileInterpreter) { 1892 Label profile_continue; 1893 1894 // If no method data exists, go to profile_continue. 1895 test_method_data_pointer(mdp, profile_continue); 1896 1897 // Build the base (index * per_case_size_in_bytes()) + 1898 // case_array_offset_in_bytes() 1899 movl(reg2, in_bytes(MultiBranchData::per_case_size())); 1900 imulptr(index, reg2); // XXX l ? 1901 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? 1902 1903 // Update the case count 1904 increment_mdp_data_at(mdp, 1905 index, 1906 in_bytes(MultiBranchData::relative_count_offset())); 1907 1908 // The method data pointer needs to be updated. 1909 update_mdp_by_offset(mdp, 1910 index, 1911 in_bytes(MultiBranchData:: 1912 relative_displacement_offset())); 1913 1914 bind(profile_continue); 1915 } 1916 } 1917 1918 1919 1920 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 1921 if (state == atos) { 1922 MacroAssembler::verify_oop(reg); 1923 } 1924 } 1925 1926 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 1927 #ifndef _LP64 1928 if ((state == ftos && UseSSE < 1) || 1929 (state == dtos && UseSSE < 2)) { 1930 MacroAssembler::verify_FPU(stack_depth); 1931 } 1932 #endif 1933 } 1934 1935 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. 1936 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 1937 int increment, Address mask, 1938 Register scratch, bool preloaded, 1939 Condition cond, Label* where) { 1940 if (!preloaded) { 1941 movl(scratch, counter_addr); 1942 } 1943 incrementl(scratch, increment); 1944 movl(counter_addr, scratch); 1945 andl(scratch, mask); 1946 jcc(cond, *where); 1947 } 1948 1949 void InterpreterMacroAssembler::notify_method_entry() { 1950 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1951 // track stack depth. If it is possible to enter interp_only_mode we add 1952 // the code to check if the event should be sent. 1953 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1954 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1955 if (JvmtiExport::can_post_interpreter_events()) { 1956 Label L; 1957 NOT_LP64(get_thread(rthread);) 1958 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1959 testl(rdx, rdx); 1960 jcc(Assembler::zero, L); 1961 call_VM(noreg, CAST_FROM_FN_PTR(address, 1962 InterpreterRuntime::post_method_entry)); 1963 bind(L); 1964 } 1965 1966 { 1967 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1968 NOT_LP64(get_thread(rthread);) 1969 get_method(rarg); 1970 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), 1971 rthread, rarg); 1972 } 1973 1974 // RedefineClasses() tracing support for obsolete method entry 1975 if (log_is_enabled(Trace, redefine, class, obsolete)) { 1976 NOT_LP64(get_thread(rthread);) 1977 get_method(rarg); 1978 call_VM_leaf( 1979 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 1980 rthread, rarg); 1981 } 1982 } 1983 1984 1985 void InterpreterMacroAssembler::notify_method_exit( 1986 TosState state, NotifyMethodExitMode mode) { 1987 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1988 // track stack depth. If it is possible to enter interp_only_mode we add 1989 // the code to check if the event should be sent. 1990 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1991 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1992 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 1993 Label L; 1994 // Note: frame::interpreter_frame_result has a dependency on how the 1995 // method result is saved across the call to post_method_exit. If this 1996 // is changed then the interpreter_frame_result implementation will 1997 // need to be updated too. 1998 1999 // template interpreter will leave the result on the top of the stack. 2000 push(state); 2001 NOT_LP64(get_thread(rthread);) 2002 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 2003 testl(rdx, rdx); 2004 jcc(Assembler::zero, L); 2005 call_VM(noreg, 2006 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 2007 bind(L); 2008 pop(state); 2009 } 2010 2011 { 2012 SkipIfEqual skip(this, &DTraceMethodProbes, false); 2013 push(state); 2014 NOT_LP64(get_thread(rthread);) 2015 get_method(rarg); 2016 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 2017 rthread, rarg); 2018 pop(state); 2019 } 2020 }