1 /* 2 * Copyright (c) 1997, 2015, 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 "oops/arrayOop.hpp" 30 #include "oops/markOop.hpp" 31 #include "oops/methodData.hpp" 32 #include "oops/method.hpp" 33 #include "prims/jvmtiExport.hpp" 34 #include "prims/jvmtiRedefineClassesTrace.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 #ifndef CC_INTERP 49 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) { 50 Label update, next, none; 51 52 verify_oop(obj); 53 54 testptr(obj, obj); 55 jccb(Assembler::notZero, update); 56 orptr(mdo_addr, TypeEntries::null_seen); 57 jmpb(next); 58 59 bind(update); 60 load_klass(obj, obj); 61 62 xorptr(obj, mdo_addr); 63 testptr(obj, TypeEntries::type_klass_mask); 64 jccb(Assembler::zero, next); // klass seen before, nothing to 65 // do. The unknown bit may have been 66 // set already but no need to check. 67 68 testptr(obj, TypeEntries::type_unknown); 69 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 70 71 cmpptr(mdo_addr, 0); 72 jccb(Assembler::equal, none); 73 cmpptr(mdo_addr, TypeEntries::null_seen); 74 jccb(Assembler::equal, none); 75 // There is a chance that the checks above (re-reading profiling 76 // data from memory) fail if another thread has just set the 77 // profiling to this obj's klass 78 xorptr(obj, mdo_addr); 79 testptr(obj, TypeEntries::type_klass_mask); 80 jccb(Assembler::zero, next); 81 82 // different than before. Cannot keep accurate profile. 83 orptr(mdo_addr, TypeEntries::type_unknown); 84 jmpb(next); 85 86 bind(none); 87 // first time here. Set profile type. 88 movptr(mdo_addr, obj); 89 90 bind(next); 91 } 92 93 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) { 94 if (!ProfileInterpreter) { 95 return; 96 } 97 98 if (MethodData::profile_arguments() || MethodData::profile_return()) { 99 Label profile_continue; 100 101 test_method_data_pointer(mdp, profile_continue); 102 103 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size()); 104 105 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag); 106 jcc(Assembler::notEqual, profile_continue); 107 108 if (MethodData::profile_arguments()) { 109 Label done; 110 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset()); 111 addptr(mdp, off_to_args); 112 113 for (int i = 0; i < TypeProfileArgsLimit; i++) { 114 if (i > 0 || MethodData::profile_return()) { 115 // If return value type is profiled we may have no argument to profile 116 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 117 subl(tmp, i*TypeStackSlotEntries::per_arg_count()); 118 cmpl(tmp, TypeStackSlotEntries::per_arg_count()); 119 jcc(Assembler::less, done); 120 } 121 movptr(tmp, Address(callee, Method::const_offset())); 122 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset())); 123 // stack offset o (zero based) from the start of the argument 124 // list, for n arguments translates into offset n - o - 1 from 125 // the end of the argument list 126 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args)); 127 subl(tmp, 1); 128 Address arg_addr = argument_address(tmp); 129 movptr(tmp, arg_addr); 130 131 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args); 132 profile_obj_type(tmp, mdo_arg_addr); 133 134 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size()); 135 addptr(mdp, to_add); 136 off_to_args += to_add; 137 } 138 139 if (MethodData::profile_return()) { 140 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 141 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count()); 142 } 143 144 bind(done); 145 146 if (MethodData::profile_return()) { 147 // We're right after the type profile for the last 148 // argument. tmp is the number of cells left in the 149 // CallTypeData/VirtualCallTypeData to reach its end. Non null 150 // if there's a return to profile. 151 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type"); 152 shll(tmp, exact_log2(DataLayout::cell_size)); 153 addptr(mdp, tmp); 154 } 155 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp); 156 } else { 157 assert(MethodData::profile_return(), "either profile call args or call ret"); 158 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size())); 159 } 160 161 // mdp points right after the end of the 162 // CallTypeData/VirtualCallTypeData, right after the cells for the 163 // return value type if there's one 164 165 bind(profile_continue); 166 } 167 } 168 169 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) { 170 assert_different_registers(mdp, ret, tmp, _bcp_register); 171 if (ProfileInterpreter && MethodData::profile_return()) { 172 Label profile_continue, done; 173 174 test_method_data_pointer(mdp, profile_continue); 175 176 if (MethodData::profile_return_jsr292_only()) { 177 assert(Method::intrinsic_id_size_in_bytes() == 2, "assuming Method::_intrinsic_id is u2"); 178 179 // If we don't profile all invoke bytecodes we must make sure 180 // it's a bytecode we indeed profile. We can't go back to the 181 // begining of the ProfileData we intend to update to check its 182 // type because we're right after it and we don't known its 183 // length 184 Label do_profile; 185 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic); 186 jcc(Assembler::equal, do_profile); 187 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle); 188 jcc(Assembler::equal, do_profile); 189 get_method(tmp); 190 cmpw(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm); 191 jcc(Assembler::notEqual, profile_continue); 192 193 bind(do_profile); 194 } 195 196 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size())); 197 mov(tmp, ret); 198 profile_obj_type(tmp, mdo_ret_addr); 199 200 bind(profile_continue); 201 } 202 } 203 204 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) { 205 if (ProfileInterpreter && MethodData::profile_parameters()) { 206 Label profile_continue, done; 207 208 test_method_data_pointer(mdp, profile_continue); 209 210 // Load the offset of the area within the MDO used for 211 // parameters. If it's negative we're not profiling any parameters 212 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()))); 213 testl(tmp1, tmp1); 214 jcc(Assembler::negative, profile_continue); 215 216 // Compute a pointer to the area for parameters from the offset 217 // and move the pointer to the slot for the last 218 // parameters. Collect profiling from last parameter down. 219 // mdo start + parameters offset + array length - 1 220 addptr(mdp, tmp1); 221 movptr(tmp1, Address(mdp, ArrayData::array_len_offset())); 222 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 223 224 Label loop; 225 bind(loop); 226 227 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0)); 228 int type_base = in_bytes(ParametersTypeData::type_offset(0)); 229 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size); 230 Address arg_off(mdp, tmp1, per_arg_scale, off_base); 231 Address arg_type(mdp, tmp1, per_arg_scale, type_base); 232 233 // load offset on the stack from the slot for this parameter 234 movptr(tmp2, arg_off); 235 negptr(tmp2); 236 // read the parameter from the local area 237 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale())); 238 239 // profile the parameter 240 profile_obj_type(tmp2, arg_type); 241 242 // go to next parameter 243 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 244 jcc(Assembler::positive, loop); 245 246 bind(profile_continue); 247 } 248 } 249 #endif 250 251 #ifdef CC_INTERP 252 void InterpreterMacroAssembler::get_method(Register reg) { 253 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize))); 254 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); 255 } 256 #endif // CC_INTERP 257 258 #ifndef CC_INTERP 259 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, 260 int number_of_arguments) { 261 // interpreter specific 262 // 263 // Note: No need to save/restore bcp & locals registers 264 // since these are callee saved registers and no blocking/ 265 // GC can happen in leaf calls. 266 // Further Note: DO NOT save/restore bcp/locals. If a caller has 267 // already saved them so that it can use rsi/rdi as temporaries 268 // then a save/restore here will DESTROY the copy the caller 269 // saved! There used to be a save_bcp() that only happened in 270 // the ASSERT path (no restore_bcp). Which caused bizarre failures 271 // when jvm built with ASSERTs. 272 #ifdef ASSERT 273 { 274 Label L; 275 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 276 jcc(Assembler::equal, L); 277 stop("InterpreterMacroAssembler::call_VM_leaf_base:" 278 " last_sp != NULL"); 279 bind(L); 280 } 281 #endif 282 // super call 283 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 284 // interpreter specific 285 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals 286 // but since they may not have been saved (and we don't want to 287 // save them here (see note above) the assert is invalid. 288 } 289 290 void InterpreterMacroAssembler::call_VM_base(Register oop_result, 291 Register java_thread, 292 Register last_java_sp, 293 address entry_point, 294 int number_of_arguments, 295 bool check_exceptions) { 296 // interpreter specific 297 // 298 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't 299 // really make a difference for these runtime calls, since they are 300 // slow anyway. Btw., bcp must be saved/restored since it may change 301 // due to GC. 302 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");) 303 save_bcp(); 304 #ifdef ASSERT 305 { 306 Label L; 307 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 308 jcc(Assembler::equal, L); 309 stop("InterpreterMacroAssembler::call_VM_leaf_base:" 310 " last_sp != NULL"); 311 bind(L); 312 } 313 #endif /* ASSERT */ 314 // super call 315 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, 316 entry_point, number_of_arguments, 317 check_exceptions); 318 // interpreter specific 319 restore_bcp(); 320 restore_locals(); 321 } 322 323 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { 324 if (JvmtiExport::can_pop_frame()) { 325 Label L; 326 // Initiate popframe handling only if it is not already being 327 // processed. If the flag has the popframe_processing bit set, it 328 // means that this code is called *during* popframe handling - we 329 // don't want to reenter. 330 // This method is only called just after the call into the vm in 331 // call_VM_base, so the arg registers are available. 332 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit 333 LP64_ONLY(c_rarg0); 334 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset())); 335 testl(pop_cond, JavaThread::popframe_pending_bit); 336 jcc(Assembler::zero, L); 337 testl(pop_cond, JavaThread::popframe_processing_bit); 338 jcc(Assembler::notZero, L); 339 // Call Interpreter::remove_activation_preserving_args_entry() to get the 340 // address of the same-named entrypoint in the generated interpreter code. 341 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); 342 jmp(rax); 343 bind(L); 344 NOT_LP64(get_thread(java_thread);) 345 } 346 } 347 348 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { 349 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 350 NOT_LP64(get_thread(thread);) 351 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 352 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); 353 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); 354 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); 355 #ifdef _LP64 356 switch (state) { 357 case atos: movptr(rax, oop_addr); 358 movptr(oop_addr, (int32_t)NULL_WORD); 359 verify_oop(rax, state); break; 360 case ltos: movptr(rax, val_addr); break; 361 case btos: // fall through 362 case ctos: // fall through 363 case stos: // fall through 364 case itos: movl(rax, val_addr); break; 365 case ftos: load_float(val_addr); break; 366 case dtos: load_double(val_addr); break; 367 case vtos: /* nothing to do */ break; 368 default : ShouldNotReachHere(); 369 } 370 // Clean up tos value in the thread object 371 movl(tos_addr, (int) ilgl); 372 movl(val_addr, (int32_t) NULL_WORD); 373 #else 374 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() 375 + in_ByteSize(wordSize)); 376 switch (state) { 377 case atos: movptr(rax, oop_addr); 378 movptr(oop_addr, NULL_WORD); 379 verify_oop(rax, state); break; 380 case ltos: 381 movl(rdx, val_addr1); // fall through 382 case btos: // fall through 383 case ctos: // fall through 384 case stos: // fall through 385 case itos: movl(rax, val_addr); break; 386 case ftos: load_float(val_addr); break; 387 case dtos: load_double(val_addr); break; 388 case vtos: /* nothing to do */ break; 389 default : ShouldNotReachHere(); 390 } 391 #endif // _LP64 392 // Clean up tos value in the thread object 393 movl(tos_addr, (int32_t) ilgl); 394 movptr(val_addr, NULL_WORD); 395 NOT_LP64(movptr(val_addr1, NULL_WORD);) 396 } 397 398 399 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { 400 if (JvmtiExport::can_force_early_return()) { 401 Label L; 402 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread); 403 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread); 404 405 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 406 testptr(tmp, tmp); 407 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; 408 409 // Initiate earlyret handling only if it is not already being processed. 410 // If the flag has the earlyret_processing bit set, it means that this code 411 // is called *during* earlyret handling - we don't want to reenter. 412 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset())); 413 cmpl(tmp, JvmtiThreadState::earlyret_pending); 414 jcc(Assembler::notEqual, L); 415 416 // Call Interpreter::remove_activation_early_entry() to get the address of the 417 // same-named entrypoint in the generated interpreter code. 418 NOT_LP64(get_thread(java_thread);) 419 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 420 #ifdef _LP64 421 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 422 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp); 423 #else 424 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 425 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1); 426 #endif // _LP64 427 jmp(rax); 428 bind(L); 429 NOT_LP64(get_thread(java_thread);) 430 } 431 } 432 433 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) { 434 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); 435 load_unsigned_short(reg, Address(_bcp_register, bcp_offset)); 436 bswapl(reg); 437 shrl(reg, 16); 438 } 439 440 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, 441 int bcp_offset, 442 size_t index_size) { 443 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); 444 if (index_size == sizeof(u2)) { 445 load_unsigned_short(index, Address(_bcp_register, bcp_offset)); 446 } else if (index_size == sizeof(u4)) { 447 movl(index, Address(_bcp_register, bcp_offset)); 448 // Check if the secondary index definition is still ~x, otherwise 449 // we have to change the following assembler code to calculate the 450 // plain index. 451 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); 452 notl(index); // convert to plain index 453 } else if (index_size == sizeof(u1)) { 454 load_unsigned_byte(index, Address(_bcp_register, bcp_offset)); 455 } else { 456 ShouldNotReachHere(); 457 } 458 } 459 460 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, 461 Register index, 462 int bcp_offset, 463 size_t index_size) { 464 assert_different_registers(cache, index); 465 get_cache_index_at_bcp(index, bcp_offset, index_size); 466 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 467 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 468 // convert from field index to ConstantPoolCacheEntry index 469 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); 470 shll(index, 2); 471 } 472 473 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, 474 Register index, 475 Register bytecode, 476 int byte_no, 477 int bcp_offset, 478 size_t index_size) { 479 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); 480 // We use a 32-bit load here since the layout of 64-bit words on 481 // little-endian machines allow us that. 482 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); 483 const int shift_count = (1 + byte_no) * BitsPerByte; 484 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || 485 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), 486 "correct shift count"); 487 shrl(bytecode, shift_count); 488 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); 489 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); 490 } 491 492 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, 493 Register tmp, 494 int bcp_offset, 495 size_t index_size) { 496 assert(cache != tmp, "must use different register"); 497 get_cache_index_at_bcp(tmp, bcp_offset, index_size); 498 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 499 // convert from field index to ConstantPoolCacheEntry index 500 // and from word offset to byte offset 501 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); 502 shll(tmp, 2 + LogBytesPerWord); 503 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 504 // skip past the header 505 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 506 addptr(cache, tmp); // construct pointer to cache entry 507 } 508 509 // Load object from cpool->resolved_references(index) 510 void InterpreterMacroAssembler::load_resolved_reference_at_index( 511 Register result, Register index) { 512 assert_different_registers(result, index); 513 // convert from field index to resolved_references() index and from 514 // word index to byte offset. Since this is a java object, it can be compressed 515 Register tmp = index; // reuse 516 shll(tmp, LogBytesPerHeapOop); 517 518 get_constant_pool(result); 519 // load pointer for resolved_references[] objArray 520 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); 521 // JNIHandles::resolve(obj); 522 movptr(result, Address(result, 0)); 523 // Add in the index 524 addptr(result, tmp); 525 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 526 } 527 528 529 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a 530 // subtype of super_klass. 531 // 532 // Args: 533 // rax: superklass 534 // Rsub_klass: subklass 535 // 536 // Kills: 537 // rcx, rdi 538 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, 539 Label& ok_is_subtype) { 540 assert(Rsub_klass != rax, "rax holds superklass"); 541 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");) 542 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");) 543 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); 544 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); 545 546 // Profile the not-null value's klass. 547 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 548 549 // Do the check. 550 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 551 552 // Profile the failure of the check. 553 profile_typecheck_failed(rcx); // blows rcx 554 } 555 556 557 #ifndef _LP64 558 void InterpreterMacroAssembler::f2ieee() { 559 if (IEEEPrecision) { 560 fstp_s(Address(rsp, 0)); 561 fld_s(Address(rsp, 0)); 562 } 563 } 564 565 566 void InterpreterMacroAssembler::d2ieee() { 567 if (IEEEPrecision) { 568 fstp_d(Address(rsp, 0)); 569 fld_d(Address(rsp, 0)); 570 } 571 } 572 #endif // _LP64 573 574 // Java Expression Stack 575 576 void InterpreterMacroAssembler::pop_ptr(Register r) { 577 pop(r); 578 } 579 580 void InterpreterMacroAssembler::push_ptr(Register r) { 581 push(r); 582 } 583 584 void InterpreterMacroAssembler::push_i(Register r) { 585 push(r); 586 } 587 588 void InterpreterMacroAssembler::push_f(XMMRegister r) { 589 subptr(rsp, wordSize); 590 movflt(Address(rsp, 0), r); 591 } 592 593 void InterpreterMacroAssembler::pop_f(XMMRegister r) { 594 movflt(r, Address(rsp, 0)); 595 addptr(rsp, wordSize); 596 } 597 598 void InterpreterMacroAssembler::push_d(XMMRegister r) { 599 subptr(rsp, 2 * wordSize); 600 movdbl(Address(rsp, 0), r); 601 } 602 603 void InterpreterMacroAssembler::pop_d(XMMRegister r) { 604 movdbl(r, Address(rsp, 0)); 605 addptr(rsp, 2 * Interpreter::stackElementSize); 606 } 607 608 #ifdef _LP64 609 void InterpreterMacroAssembler::pop_i(Register r) { 610 // XXX can't use pop currently, upper half non clean 611 movl(r, Address(rsp, 0)); 612 addptr(rsp, wordSize); 613 } 614 615 void InterpreterMacroAssembler::pop_l(Register r) { 616 movq(r, Address(rsp, 0)); 617 addptr(rsp, 2 * Interpreter::stackElementSize); 618 } 619 620 void InterpreterMacroAssembler::push_l(Register r) { 621 subptr(rsp, 2 * wordSize); 622 movq(Address(rsp, 0), r); 623 } 624 625 void InterpreterMacroAssembler::pop(TosState state) { 626 switch (state) { 627 case atos: pop_ptr(); break; 628 case btos: 629 case ctos: 630 case stos: 631 case itos: pop_i(); break; 632 case ltos: pop_l(); break; 633 case ftos: pop_f(xmm0); break; 634 case dtos: pop_d(xmm0); break; 635 case vtos: /* nothing to do */ break; 636 default: ShouldNotReachHere(); 637 } 638 verify_oop(rax, state); 639 } 640 641 void InterpreterMacroAssembler::push(TosState state) { 642 verify_oop(rax, state); 643 switch (state) { 644 case atos: push_ptr(); break; 645 case btos: 646 case ctos: 647 case stos: 648 case itos: push_i(); break; 649 case ltos: push_l(); break; 650 case ftos: push_f(xmm0); break; 651 case dtos: push_d(xmm0); break; 652 case vtos: /* nothing to do */ break; 653 default : ShouldNotReachHere(); 654 } 655 } 656 #else 657 void InterpreterMacroAssembler::pop_i(Register r) { 658 pop(r); 659 } 660 661 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 662 pop(lo); 663 pop(hi); 664 } 665 666 void InterpreterMacroAssembler::pop_f() { 667 fld_s(Address(rsp, 0)); 668 addptr(rsp, 1 * wordSize); 669 } 670 671 void InterpreterMacroAssembler::pop_d() { 672 fld_d(Address(rsp, 0)); 673 addptr(rsp, 2 * wordSize); 674 } 675 676 677 void InterpreterMacroAssembler::pop(TosState state) { 678 switch (state) { 679 case atos: pop_ptr(rax); break; 680 case btos: // fall through 681 case ctos: // fall through 682 case stos: // fall through 683 case itos: pop_i(rax); break; 684 case ltos: pop_l(rax, rdx); break; 685 case ftos: 686 if (UseSSE >= 1) { 687 pop_f(xmm0); 688 } else { 689 pop_f(); 690 } 691 break; 692 case dtos: 693 if (UseSSE >= 2) { 694 pop_d(xmm0); 695 } else { 696 pop_d(); 697 } 698 break; 699 case vtos: /* nothing to do */ break; 700 default : ShouldNotReachHere(); 701 } 702 verify_oop(rax, state); 703 } 704 705 706 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 707 push(hi); 708 push(lo); 709 } 710 711 void InterpreterMacroAssembler::push_f() { 712 // Do not schedule for no AGI! Never write beyond rsp! 713 subptr(rsp, 1 * wordSize); 714 fstp_s(Address(rsp, 0)); 715 } 716 717 void InterpreterMacroAssembler::push_d() { 718 // Do not schedule for no AGI! Never write beyond rsp! 719 subptr(rsp, 2 * wordSize); 720 fstp_d(Address(rsp, 0)); 721 } 722 723 724 void InterpreterMacroAssembler::push(TosState state) { 725 verify_oop(rax, state); 726 switch (state) { 727 case atos: push_ptr(rax); break; 728 case btos: // fall through 729 case ctos: // fall through 730 case stos: // fall through 731 case itos: push_i(rax); break; 732 case ltos: push_l(rax, rdx); break; 733 case ftos: 734 if (UseSSE >= 1) { 735 push_f(xmm0); 736 } else { 737 push_f(); 738 } 739 break; 740 case dtos: 741 if (UseSSE >= 2) { 742 push_d(xmm0); 743 } else { 744 push_d(); 745 } 746 break; 747 case vtos: /* nothing to do */ break; 748 default : ShouldNotReachHere(); 749 } 750 } 751 #endif // _LP64 752 753 754 // Helpers for swap and dup 755 void InterpreterMacroAssembler::load_ptr(int n, Register val) { 756 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 757 } 758 759 void InterpreterMacroAssembler::store_ptr(int n, Register val) { 760 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 761 } 762 763 764 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 765 // set sender sp 766 lea(_bcp_register, Address(rsp, wordSize)); 767 // record last_sp 768 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register); 769 } 770 771 772 // Jump to from_interpreted entry of a call unless single stepping is possible 773 // in this thread in which case we must call the i2i entry 774 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 775 prepare_to_jump_from_interpreted(); 776 777 if (JvmtiExport::can_post_interpreter_events()) { 778 Label run_compiled_code; 779 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 780 // compiled code in threads for which the event is enabled. Check here for 781 // interp_only_mode if these events CAN be enabled. 782 // interp_only is an int, on little endian it is sufficient to test the byte only 783 // Is a cmpl faster? 784 LP64_ONLY(temp = r15_thread;) 785 NOT_LP64(get_thread(temp);) 786 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 787 jccb(Assembler::zero, run_compiled_code); 788 jmp(Address(method, Method::interpreter_entry_offset())); 789 bind(run_compiled_code); 790 } 791 792 jmp(Address(method, Method::from_interpreted_offset())); 793 } 794 795 // The following two routines provide a hook so that an implementation 796 // can schedule the dispatch in two parts. x86 does not do this. 797 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 798 // Nothing x86 specific to be done here 799 } 800 801 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 802 dispatch_next(state, step); 803 } 804 805 void InterpreterMacroAssembler::dispatch_base(TosState state, 806 address* table, 807 bool verifyoop) { 808 verify_FPU(1, state); 809 if (VerifyActivationFrameSize) { 810 Label L; 811 mov(rcx, rbp); 812 subptr(rcx, rsp); 813 int32_t min_frame_size = 814 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * 815 wordSize; 816 cmpptr(rcx, (int32_t)min_frame_size); 817 jcc(Assembler::greaterEqual, L); 818 stop("broken stack frame"); 819 bind(L); 820 } 821 if (verifyoop) { 822 verify_oop(rax, state); 823 } 824 #ifdef _LP64 825 lea(rscratch1, ExternalAddress((address)table)); 826 jmp(Address(rscratch1, rbx, Address::times_8)); 827 #else 828 Address index(noreg, rbx, Address::times_ptr); 829 ExternalAddress tbl((address)table); 830 ArrayAddress dispatch(tbl, index); 831 jump(dispatch); 832 #endif // _LP64 833 } 834 835 void InterpreterMacroAssembler::dispatch_only(TosState state) { 836 dispatch_base(state, Interpreter::dispatch_table(state)); 837 } 838 839 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 840 dispatch_base(state, Interpreter::normal_table(state)); 841 } 842 843 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 844 dispatch_base(state, Interpreter::normal_table(state), false); 845 } 846 847 848 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { 849 // load next bytecode (load before advancing _bcp_register to prevent AGI) 850 load_unsigned_byte(rbx, Address(_bcp_register, step)); 851 // advance _bcp_register 852 increment(_bcp_register, step); 853 dispatch_base(state, Interpreter::dispatch_table(state)); 854 } 855 856 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 857 // load current bytecode 858 load_unsigned_byte(rbx, Address(_bcp_register, 0)); 859 dispatch_base(state, table); 860 } 861 862 // remove activation 863 // 864 // Unlock the receiver if this is a synchronized method. 865 // Unlock any Java monitors from syncronized blocks. 866 // Remove the activation from the stack. 867 // 868 // If there are locked Java monitors 869 // If throw_monitor_exception 870 // throws IllegalMonitorStateException 871 // Else if install_monitor_exception 872 // installs IllegalMonitorStateException 873 // Else 874 // no error processing 875 void InterpreterMacroAssembler::remove_activation( 876 TosState state, 877 Register ret_addr, 878 bool throw_monitor_exception, 879 bool install_monitor_exception, 880 bool notify_jvmdi) { 881 // Note: Registers rdx xmm0 may be in use for the 882 // result check if synchronized method 883 Label unlocked, unlock, no_unlock; 884 885 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 886 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 887 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 888 // monitor pointers need different register 889 // because rdx may have the result in it 890 NOT_LP64(get_thread(rcx);) 891 892 // get the value of _do_not_unlock_if_synchronized into rdx 893 const Address do_not_unlock_if_synchronized(rthread, 894 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 895 movbool(rbx, do_not_unlock_if_synchronized); 896 movbool(do_not_unlock_if_synchronized, false); // reset the flag 897 898 // get method access flags 899 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 900 movl(rcx, Address(rcx, Method::access_flags_offset())); 901 testl(rcx, JVM_ACC_SYNCHRONIZED); 902 jcc(Assembler::zero, unlocked); 903 904 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 905 // is set. 906 testbool(rbx); 907 jcc(Assembler::notZero, no_unlock); 908 909 // unlock monitor 910 push(state); // save result 911 912 // BasicObjectLock will be first in list, since this is a 913 // synchronized method. However, need to check that the object has 914 // not been unlocked by an explicit monitorexit bytecode. 915 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * 916 wordSize - (int) sizeof(BasicObjectLock)); 917 // We use c_rarg1/rdx so that if we go slow path it will be the correct 918 // register for unlock_object to pass to VM directly 919 lea(robj, monitor); // address of first monitor 920 921 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes())); 922 testptr(rax, rax); 923 jcc(Assembler::notZero, unlock); 924 925 pop(state); 926 if (throw_monitor_exception) { 927 // Entry already unlocked, need to throw exception 928 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow 929 call_VM(noreg, CAST_FROM_FN_PTR(address, 930 InterpreterRuntime::throw_illegal_monitor_state_exception)); 931 should_not_reach_here(); 932 } else { 933 // Monitor already unlocked during a stack unroll. If requested, 934 // install an illegal_monitor_state_exception. Continue with 935 // stack unrolling. 936 if (install_monitor_exception) { 937 NOT_LP64(empty_FPU_stack();) 938 call_VM(noreg, CAST_FROM_FN_PTR(address, 939 InterpreterRuntime::new_illegal_monitor_state_exception)); 940 } 941 jmp(unlocked); 942 } 943 944 bind(unlock); 945 unlock_object(robj); 946 pop(state); 947 948 // Check that for block-structured locking (i.e., that all locked 949 // objects has been unlocked) 950 bind(unlocked); 951 952 // rax, rdx: Might contain return value 953 954 // Check that all monitors are unlocked 955 { 956 Label loop, exception, entry, restart; 957 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 958 const Address monitor_block_top( 959 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 960 const Address monitor_block_bot( 961 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 962 963 bind(restart); 964 // We use c_rarg1 so that if we go slow path it will be the correct 965 // register for unlock_object to pass to VM directly 966 movptr(rmon, monitor_block_top); // points to current entry, starting 967 // with top-most entry 968 lea(rbx, monitor_block_bot); // points to word before bottom of 969 // monitor block 970 jmp(entry); 971 972 // Entry already locked, need to throw exception 973 bind(exception); 974 975 if (throw_monitor_exception) { 976 // Throw exception 977 NOT_LP64(empty_FPU_stack();) 978 MacroAssembler::call_VM(noreg, 979 CAST_FROM_FN_PTR(address, InterpreterRuntime:: 980 throw_illegal_monitor_state_exception)); 981 should_not_reach_here(); 982 } else { 983 // Stack unrolling. Unlock object and install illegal_monitor_exception. 984 // Unlock does not block, so don't have to worry about the frame. 985 // We don't have to preserve c_rarg1 since we are going to throw an exception. 986 987 push(state); 988 mov(robj, rmon); // nop if robj and rmon are the same 989 unlock_object(robj); 990 pop(state); 991 992 if (install_monitor_exception) { 993 NOT_LP64(empty_FPU_stack();) 994 call_VM(noreg, CAST_FROM_FN_PTR(address, 995 InterpreterRuntime:: 996 new_illegal_monitor_state_exception)); 997 } 998 999 jmp(restart); 1000 } 1001 1002 bind(loop); 1003 // check if current entry is used 1004 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); 1005 jcc(Assembler::notEqual, exception); 1006 1007 addptr(rmon, entry_size); // otherwise advance to next entry 1008 bind(entry); 1009 cmpptr(rmon, rbx); // check if bottom reached 1010 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 1011 } 1012 1013 bind(no_unlock); 1014 1015 // jvmti support 1016 if (notify_jvmdi) { 1017 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 1018 } else { 1019 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 1020 } 1021 1022 // remove activation 1023 // get sender sp 1024 movptr(rbx, 1025 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 1026 leave(); // remove frame anchor 1027 pop(ret_addr); // get return address 1028 mov(rsp, rbx); // set sp to sender sp 1029 } 1030 #endif // !CC_INTERP 1031 1032 void InterpreterMacroAssembler::get_method_counters(Register method, 1033 Register mcs, Label& skip) { 1034 Label has_counters; 1035 movptr(mcs, Address(method, Method::method_counters_offset())); 1036 testptr(mcs, mcs); 1037 jcc(Assembler::notZero, has_counters); 1038 call_VM(noreg, CAST_FROM_FN_PTR(address, 1039 InterpreterRuntime::build_method_counters), method); 1040 movptr(mcs, Address(method,Method::method_counters_offset())); 1041 testptr(mcs, mcs); 1042 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory 1043 bind(has_counters); 1044 } 1045 1046 1047 // Lock object 1048 // 1049 // Args: 1050 // rdx, c_rarg1: BasicObjectLock to be used for locking 1051 // 1052 // Kills: 1053 // rax, rbx 1054 void InterpreterMacroAssembler::lock_object(Register lock_reg) { 1055 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1056 "The argument is only for looks. It must be c_rarg1"); 1057 1058 if (UseHeavyMonitors) { 1059 call_VM(noreg, 1060 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1061 lock_reg); 1062 } else { 1063 Label done; 1064 1065 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1066 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a 1067 // problematic case where tmp_reg = no_reg. 1068 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1069 1070 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 1071 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 1072 const int mark_offset = lock_offset + 1073 BasicLock::displaced_header_offset_in_bytes(); 1074 1075 Label slow_case; 1076 1077 // Load object pointer into obj_reg 1078 movptr(obj_reg, Address(lock_reg, obj_offset)); 1079 1080 if (UseBiasedLocking) { 1081 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case); 1082 } 1083 1084 // Load immediate 1 into swap_reg %rax 1085 movl(swap_reg, (int32_t)1); 1086 1087 // Load (object->mark() | 1) into swap_reg %rax 1088 orptr(swap_reg, Address(obj_reg, 0)); 1089 1090 // Save (object->mark() | 1) into BasicLock's displaced header 1091 movptr(Address(lock_reg, mark_offset), swap_reg); 1092 1093 assert(lock_offset == 0, 1094 "displached header must be first word in BasicObjectLock"); 1095 1096 if (os::is_MP()) lock(); 1097 cmpxchgptr(lock_reg, Address(obj_reg, 0)); 1098 if (PrintBiasedLockingStatistics) { 1099 cond_inc32(Assembler::zero, 1100 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1101 } 1102 jcc(Assembler::zero, done); 1103 1104 const int zero_bits = LP64_ONLY(7) NOT_LP64(3); 1105 1106 // Test if the oopMark is an obvious stack pointer, i.e., 1107 // 1) (mark & zero_bits) == 0, and 1108 // 2) rsp <= mark < mark + os::pagesize() 1109 // 1110 // These 3 tests can be done by evaluating the following 1111 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())), 1112 // assuming both stack pointer and pagesize have their 1113 // least significant bits clear. 1114 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg 1115 subptr(swap_reg, rsp); 1116 andptr(swap_reg, zero_bits - os::vm_page_size()); 1117 1118 // Save the test result, for recursive case, the result is zero 1119 movptr(Address(lock_reg, mark_offset), swap_reg); 1120 1121 if (PrintBiasedLockingStatistics) { 1122 cond_inc32(Assembler::zero, 1123 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1124 } 1125 jcc(Assembler::zero, done); 1126 1127 bind(slow_case); 1128 1129 // Call the runtime routine for slow case 1130 call_VM(noreg, 1131 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1132 lock_reg); 1133 1134 bind(done); 1135 } 1136 } 1137 1138 1139 // Unlocks an object. Used in monitorexit bytecode and 1140 // remove_activation. Throws an IllegalMonitorException if object is 1141 // not locked by current thread. 1142 // 1143 // Args: 1144 // rdx, c_rarg1: BasicObjectLock for lock 1145 // 1146 // Kills: 1147 // rax 1148 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) 1149 // rscratch1, rscratch2 (scratch regs) 1150 // rax, rbx, rcx, rdx 1151 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 1152 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1153 "The argument is only for looks. It must be c_rarg1"); 1154 1155 if (UseHeavyMonitors) { 1156 call_VM(noreg, 1157 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1158 lock_reg); 1159 } else { 1160 Label done; 1161 1162 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1163 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark 1164 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1165 1166 save_bcp(); // Save in case of exception 1167 1168 // Convert from BasicObjectLock structure to object and BasicLock 1169 // structure Store the BasicLock address into %rax 1170 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 1171 1172 // Load oop into obj_reg(%c_rarg3) 1173 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); 1174 1175 // Free entry 1176 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); 1177 1178 if (UseBiasedLocking) { 1179 biased_locking_exit(obj_reg, header_reg, done); 1180 } 1181 1182 // Load the old header from BasicLock structure 1183 movptr(header_reg, Address(swap_reg, 1184 BasicLock::displaced_header_offset_in_bytes())); 1185 1186 // Test for recursion 1187 testptr(header_reg, header_reg); 1188 1189 // zero for recursive case 1190 jcc(Assembler::zero, done); 1191 1192 // Atomic swap back the old header 1193 if (os::is_MP()) lock(); 1194 cmpxchgptr(header_reg, Address(obj_reg, 0)); 1195 1196 // zero for recursive case 1197 jcc(Assembler::zero, done); 1198 1199 // Call the runtime routine for slow case. 1200 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), 1201 obj_reg); // restore obj 1202 call_VM(noreg, 1203 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1204 lock_reg); 1205 1206 bind(done); 1207 1208 restore_bcp(); 1209 } 1210 } 1211 #ifndef CC_INTERP 1212 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, 1213 Label& zero_continue) { 1214 assert(ProfileInterpreter, "must be profiling interpreter"); 1215 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize)); 1216 testptr(mdp, mdp); 1217 jcc(Assembler::zero, zero_continue); 1218 } 1219 1220 1221 // Set the method data pointer for the current bcp. 1222 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1223 assert(ProfileInterpreter, "must be profiling interpreter"); 1224 Label set_mdp; 1225 push(rax); 1226 push(rbx); 1227 1228 get_method(rbx); 1229 // Test MDO to avoid the call if it is NULL. 1230 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 1231 testptr(rax, rax); 1232 jcc(Assembler::zero, set_mdp); 1233 // rbx: method 1234 // _bcp_register: bcp 1235 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register); 1236 // rax: mdi 1237 // mdo is guaranteed to be non-zero here, we checked for it before the call. 1238 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 1239 addptr(rbx, in_bytes(MethodData::data_offset())); 1240 addptr(rax, rbx); 1241 bind(set_mdp); 1242 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax); 1243 pop(rbx); 1244 pop(rax); 1245 } 1246 1247 void InterpreterMacroAssembler::verify_method_data_pointer() { 1248 assert(ProfileInterpreter, "must be profiling interpreter"); 1249 #ifdef ASSERT 1250 Label verify_continue; 1251 push(rax); 1252 push(rbx); 1253 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 1254 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 1255 push(arg3_reg); 1256 push(arg2_reg); 1257 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue 1258 get_method(rbx); 1259 1260 // If the mdp is valid, it will point to a DataLayout header which is 1261 // consistent with the bcp. The converse is highly probable also. 1262 load_unsigned_short(arg2_reg, 1263 Address(arg3_reg, in_bytes(DataLayout::bci_offset()))); 1264 addptr(arg2_reg, Address(rbx, Method::const_offset())); 1265 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset())); 1266 cmpptr(arg2_reg, _bcp_register); 1267 jcc(Assembler::equal, verify_continue); 1268 // rbx: method 1269 // _bcp_register: bcp 1270 // c_rarg3: mdp 1271 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), 1272 rbx, _bcp_register, arg3_reg); 1273 bind(verify_continue); 1274 pop(arg2_reg); 1275 pop(arg3_reg); 1276 pop(rbx); 1277 pop(rax); 1278 #endif // ASSERT 1279 } 1280 1281 1282 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, 1283 int constant, 1284 Register value) { 1285 assert(ProfileInterpreter, "must be profiling interpreter"); 1286 Address data(mdp_in, constant); 1287 movptr(data, value); 1288 } 1289 1290 1291 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1292 int constant, 1293 bool decrement) { 1294 // Counter address 1295 Address data(mdp_in, constant); 1296 1297 increment_mdp_data_at(data, decrement); 1298 } 1299 1300 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 1301 bool decrement) { 1302 assert(ProfileInterpreter, "must be profiling interpreter"); 1303 // %%% this does 64bit counters at best it is wasting space 1304 // at worst it is a rare bug when counters overflow 1305 1306 if (decrement) { 1307 // Decrement the register. Set condition codes. 1308 addptr(data, (int32_t) -DataLayout::counter_increment); 1309 // If the decrement causes the counter to overflow, stay negative 1310 Label L; 1311 jcc(Assembler::negative, L); 1312 addptr(data, (int32_t) DataLayout::counter_increment); 1313 bind(L); 1314 } else { 1315 assert(DataLayout::counter_increment == 1, 1316 "flow-free idiom only works with 1"); 1317 // Increment the register. Set carry flag. 1318 addptr(data, DataLayout::counter_increment); 1319 // If the increment causes the counter to overflow, pull back by 1. 1320 sbbptr(data, (int32_t)0); 1321 } 1322 } 1323 1324 1325 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1326 Register reg, 1327 int constant, 1328 bool decrement) { 1329 Address data(mdp_in, reg, Address::times_1, constant); 1330 1331 increment_mdp_data_at(data, decrement); 1332 } 1333 1334 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, 1335 int flag_byte_constant) { 1336 assert(ProfileInterpreter, "must be profiling interpreter"); 1337 int header_offset = in_bytes(DataLayout::header_offset()); 1338 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); 1339 // Set the flag 1340 orl(Address(mdp_in, header_offset), header_bits); 1341 } 1342 1343 1344 1345 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 1346 int offset, 1347 Register value, 1348 Register test_value_out, 1349 Label& not_equal_continue) { 1350 assert(ProfileInterpreter, "must be profiling interpreter"); 1351 if (test_value_out == noreg) { 1352 cmpptr(value, Address(mdp_in, offset)); 1353 } else { 1354 // Put the test value into a register, so caller can use it: 1355 movptr(test_value_out, Address(mdp_in, offset)); 1356 cmpptr(test_value_out, value); 1357 } 1358 jcc(Assembler::notEqual, not_equal_continue); 1359 } 1360 1361 1362 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1363 int offset_of_disp) { 1364 assert(ProfileInterpreter, "must be profiling interpreter"); 1365 Address disp_address(mdp_in, offset_of_disp); 1366 addptr(mdp_in, disp_address); 1367 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1368 } 1369 1370 1371 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1372 Register reg, 1373 int offset_of_disp) { 1374 assert(ProfileInterpreter, "must be profiling interpreter"); 1375 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 1376 addptr(mdp_in, disp_address); 1377 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1378 } 1379 1380 1381 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, 1382 int constant) { 1383 assert(ProfileInterpreter, "must be profiling interpreter"); 1384 addptr(mdp_in, constant); 1385 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1386 } 1387 1388 1389 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 1390 assert(ProfileInterpreter, "must be profiling interpreter"); 1391 push(return_bci); // save/restore across call_VM 1392 call_VM(noreg, 1393 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), 1394 return_bci); 1395 pop(return_bci); 1396 } 1397 1398 1399 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, 1400 Register bumped_count) { 1401 if (ProfileInterpreter) { 1402 Label profile_continue; 1403 1404 // If no method data exists, go to profile_continue. 1405 // Otherwise, assign to mdp 1406 test_method_data_pointer(mdp, profile_continue); 1407 1408 // We are taking a branch. Increment the taken count. 1409 // We inline increment_mdp_data_at to return bumped_count in a register 1410 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1411 Address data(mdp, in_bytes(JumpData::taken_offset())); 1412 movptr(bumped_count, data); 1413 assert(DataLayout::counter_increment == 1, 1414 "flow-free idiom only works with 1"); 1415 addptr(bumped_count, DataLayout::counter_increment); 1416 sbbptr(bumped_count, 0); 1417 movptr(data, bumped_count); // Store back out 1418 1419 // The method data pointer needs to be updated to reflect the new target. 1420 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1421 bind(profile_continue); 1422 } 1423 } 1424 1425 1426 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1427 if (ProfileInterpreter) { 1428 Label profile_continue; 1429 1430 // If no method data exists, go to profile_continue. 1431 test_method_data_pointer(mdp, profile_continue); 1432 1433 // We are taking a branch. Increment the not taken count. 1434 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1435 1436 // The method data pointer needs to be updated to correspond to 1437 // the next bytecode 1438 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1439 bind(profile_continue); 1440 } 1441 } 1442 1443 void InterpreterMacroAssembler::profile_call(Register mdp) { 1444 if (ProfileInterpreter) { 1445 Label profile_continue; 1446 1447 // If no method data exists, go to profile_continue. 1448 test_method_data_pointer(mdp, profile_continue); 1449 1450 // We are making a call. Increment the count. 1451 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1452 1453 // The method data pointer needs to be updated to reflect the new target. 1454 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1455 bind(profile_continue); 1456 } 1457 } 1458 1459 1460 void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1461 if (ProfileInterpreter) { 1462 Label profile_continue; 1463 1464 // If no method data exists, go to profile_continue. 1465 test_method_data_pointer(mdp, profile_continue); 1466 1467 // We are making a call. Increment the count. 1468 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1469 1470 // The method data pointer needs to be updated to reflect the new target. 1471 update_mdp_by_constant(mdp, 1472 in_bytes(VirtualCallData:: 1473 virtual_call_data_size())); 1474 bind(profile_continue); 1475 } 1476 } 1477 1478 1479 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, 1480 Register mdp, 1481 Register reg2, 1482 bool receiver_can_be_null) { 1483 if (ProfileInterpreter) { 1484 Label profile_continue; 1485 1486 // If no method data exists, go to profile_continue. 1487 test_method_data_pointer(mdp, profile_continue); 1488 1489 Label skip_receiver_profile; 1490 if (receiver_can_be_null) { 1491 Label not_null; 1492 testptr(receiver, receiver); 1493 jccb(Assembler::notZero, not_null); 1494 // We are making a call. Increment the count for null receiver. 1495 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1496 jmp(skip_receiver_profile); 1497 bind(not_null); 1498 } 1499 1500 // Record the receiver type. 1501 record_klass_in_profile(receiver, mdp, reg2, true); 1502 bind(skip_receiver_profile); 1503 1504 // The method data pointer needs to be updated to reflect the new target. 1505 #if INCLUDE_JVMCI 1506 if (MethodProfileWidth == 0) { 1507 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1508 } 1509 #else // INCLUDE_JVMCI 1510 update_mdp_by_constant(mdp, 1511 in_bytes(VirtualCallData:: 1512 virtual_call_data_size())); 1513 #endif // INCLUDE_JVMCI 1514 bind(profile_continue); 1515 } 1516 } 1517 1518 #if INCLUDE_JVMCI 1519 void InterpreterMacroAssembler::profile_called_method(Register method, Register mdp, Register reg2) { 1520 assert_different_registers(method, mdp, reg2); 1521 if (ProfileInterpreter && MethodProfileWidth > 0) { 1522 Label profile_continue; 1523 1524 // If no method data exists, go to profile_continue. 1525 test_method_data_pointer(mdp, profile_continue); 1526 1527 Label done; 1528 record_item_in_profile_helper(method, mdp, reg2, 0, done, MethodProfileWidth, 1529 &VirtualCallData::method_offset, &VirtualCallData::method_count_offset, in_bytes(VirtualCallData::nonprofiled_receiver_count_offset())); 1530 bind(done); 1531 1532 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1533 bind(profile_continue); 1534 } 1535 } 1536 #endif // INCLUDE_JVMCI 1537 1538 // This routine creates a state machine for updating the multi-row 1539 // type profile at a virtual call site (or other type-sensitive bytecode). 1540 // The machine visits each row (of receiver/count) until the receiver type 1541 // is found, or until it runs out of rows. At the same time, it remembers 1542 // the location of the first empty row. (An empty row records null for its 1543 // receiver, and can be allocated for a newly-observed receiver type.) 1544 // Because there are two degrees of freedom in the state, a simple linear 1545 // search will not work; it must be a decision tree. Hence this helper 1546 // function is recursive, to generate the required tree structured code. 1547 // It's the interpreter, so we are trading off code space for speed. 1548 // See below for example code. 1549 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1550 Register receiver, Register mdp, 1551 Register reg2, int start_row, 1552 Label& done, bool is_virtual_call) { 1553 if (TypeProfileWidth == 0) { 1554 if (is_virtual_call) { 1555 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1556 } 1557 #if INCLUDE_JVMCI 1558 else if (EnableJVMCI) { 1559 increment_mdp_data_at(mdp, in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset())); 1560 } 1561 #endif // INCLUDE_JVMCI 1562 } else { 1563 int non_profiled_offset = -1; 1564 if (is_virtual_call) { 1565 non_profiled_offset = in_bytes(CounterData::count_offset()); 1566 } 1567 #if INCLUDE_JVMCI 1568 else if (EnableJVMCI) { 1569 non_profiled_offset = in_bytes(ReceiverTypeData::nonprofiled_receiver_count_offset()); 1570 } 1571 #endif // INCLUDE_JVMCI 1572 1573 record_item_in_profile_helper(receiver, mdp, reg2, 0, done, TypeProfileWidth, 1574 &VirtualCallData::receiver_offset, &VirtualCallData::receiver_count_offset, non_profiled_offset); 1575 } 1576 } 1577 1578 void InterpreterMacroAssembler::record_item_in_profile_helper(Register item, Register mdp, 1579 Register reg2, int start_row, Label& done, int total_rows, 1580 OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn, 1581 int non_profiled_offset) { 1582 int last_row = total_rows - 1; 1583 assert(start_row <= last_row, "must be work left to do"); 1584 // Test this row for both the item and for null. 1585 // Take any of three different outcomes: 1586 // 1. found item => increment count and goto done 1587 // 2. found null => keep looking for case 1, maybe allocate this cell 1588 // 3. found something else => keep looking for cases 1 and 2 1589 // Case 3 is handled by a recursive call. 1590 for (int row = start_row; row <= last_row; row++) { 1591 Label next_test; 1592 bool test_for_null_also = (row == start_row); 1593 1594 // See if the item is item[n]. 1595 int item_offset = in_bytes(item_offset_fn(row)); 1596 test_mdp_data_at(mdp, item_offset, item, 1597 (test_for_null_also ? reg2 : noreg), 1598 next_test); 1599 // (Reg2 now contains the item from the CallData.) 1600 1601 // The item is item[n]. Increment count[n]. 1602 int count_offset = in_bytes(item_count_offset_fn(row)); 1603 increment_mdp_data_at(mdp, count_offset); 1604 jmp(done); 1605 bind(next_test); 1606 1607 if (test_for_null_also) { 1608 Label found_null; 1609 // Failed the equality check on item[n]... Test for null. 1610 testptr(reg2, reg2); 1611 if (start_row == last_row) { 1612 // The only thing left to do is handle the null case. 1613 if (non_profiled_offset >= 0) { 1614 jccb(Assembler::zero, found_null); 1615 // Item did not match any saved item and there is no empty row for it. 1616 // Increment total counter to indicate polymorphic case. 1617 increment_mdp_data_at(mdp, non_profiled_offset); 1618 jmp(done); 1619 bind(found_null); 1620 } else { 1621 jcc(Assembler::notZero, done); 1622 } 1623 break; 1624 } 1625 // Since null is rare, make it be the branch-taken case. 1626 jcc(Assembler::zero, found_null); 1627 1628 // Put all the "Case 3" tests here. 1629 record_item_in_profile_helper(item, mdp, reg2, start_row + 1, done, total_rows, 1630 item_offset_fn, item_count_offset_fn, non_profiled_offset); 1631 1632 // Found a null. Keep searching for a matching item, 1633 // but remember that this is an empty (unused) slot. 1634 bind(found_null); 1635 } 1636 } 1637 1638 // In the fall-through case, we found no matching item, but we 1639 // observed the item[start_row] is NULL. 1640 1641 // Fill in the item field and increment the count. 1642 int item_offset = in_bytes(item_offset_fn(start_row)); 1643 set_mdp_data_at(mdp, item_offset, item); 1644 int count_offset = in_bytes(item_count_offset_fn(start_row)); 1645 movl(reg2, DataLayout::counter_increment); 1646 set_mdp_data_at(mdp, count_offset, reg2); 1647 if (start_row > 0) { 1648 jmp(done); 1649 } 1650 } 1651 1652 // Example state machine code for three profile rows: 1653 // // main copy of decision tree, rooted at row[1] 1654 // if (row[0].rec == rec) { row[0].incr(); goto done; } 1655 // if (row[0].rec != NULL) { 1656 // // inner copy of decision tree, rooted at row[1] 1657 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1658 // if (row[1].rec != NULL) { 1659 // // degenerate decision tree, rooted at row[2] 1660 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1661 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow 1662 // row[2].init(rec); goto done; 1663 // } else { 1664 // // remember row[1] is empty 1665 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1666 // row[1].init(rec); goto done; 1667 // } 1668 // } else { 1669 // // remember row[0] is empty 1670 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1671 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1672 // row[0].init(rec); goto done; 1673 // } 1674 // done: 1675 1676 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1677 Register mdp, Register reg2, 1678 bool is_virtual_call) { 1679 assert(ProfileInterpreter, "must be profiling"); 1680 Label done; 1681 1682 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1683 1684 bind (done); 1685 } 1686 1687 void InterpreterMacroAssembler::profile_ret(Register return_bci, 1688 Register mdp) { 1689 if (ProfileInterpreter) { 1690 Label profile_continue; 1691 uint row; 1692 1693 // If no method data exists, go to profile_continue. 1694 test_method_data_pointer(mdp, profile_continue); 1695 1696 // Update the total ret count. 1697 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1698 1699 for (row = 0; row < RetData::row_limit(); row++) { 1700 Label next_test; 1701 1702 // See if return_bci is equal to bci[n]: 1703 test_mdp_data_at(mdp, 1704 in_bytes(RetData::bci_offset(row)), 1705 return_bci, noreg, 1706 next_test); 1707 1708 // return_bci is equal to bci[n]. Increment the count. 1709 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1710 1711 // The method data pointer needs to be updated to reflect the new target. 1712 update_mdp_by_offset(mdp, 1713 in_bytes(RetData::bci_displacement_offset(row))); 1714 jmp(profile_continue); 1715 bind(next_test); 1716 } 1717 1718 update_mdp_for_ret(return_bci); 1719 1720 bind(profile_continue); 1721 } 1722 } 1723 1724 1725 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1726 if (ProfileInterpreter) { 1727 Label profile_continue; 1728 1729 // If no method data exists, go to profile_continue. 1730 test_method_data_pointer(mdp, profile_continue); 1731 1732 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1733 1734 // The method data pointer needs to be updated. 1735 int mdp_delta = in_bytes(BitData::bit_data_size()); 1736 if (TypeProfileCasts) { 1737 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1738 } 1739 update_mdp_by_constant(mdp, mdp_delta); 1740 1741 bind(profile_continue); 1742 } 1743 } 1744 1745 1746 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1747 if (ProfileInterpreter && TypeProfileCasts) { 1748 Label profile_continue; 1749 1750 // If no method data exists, go to profile_continue. 1751 test_method_data_pointer(mdp, profile_continue); 1752 1753 int count_offset = in_bytes(CounterData::count_offset()); 1754 // Back up the address, since we have already bumped the mdp. 1755 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1756 1757 // *Decrement* the counter. We expect to see zero or small negatives. 1758 increment_mdp_data_at(mdp, count_offset, true); 1759 1760 bind (profile_continue); 1761 } 1762 } 1763 1764 1765 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { 1766 if (ProfileInterpreter) { 1767 Label profile_continue; 1768 1769 // If no method data exists, go to profile_continue. 1770 test_method_data_pointer(mdp, profile_continue); 1771 1772 // The method data pointer needs to be updated. 1773 int mdp_delta = in_bytes(BitData::bit_data_size()); 1774 if (TypeProfileCasts) { 1775 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1776 1777 // Record the object type. 1778 record_klass_in_profile(klass, mdp, reg2, false); 1779 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");) 1780 NOT_LP64(restore_locals();) // Restore EDI 1781 } 1782 update_mdp_by_constant(mdp, mdp_delta); 1783 1784 bind(profile_continue); 1785 } 1786 } 1787 1788 1789 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1790 if (ProfileInterpreter) { 1791 Label profile_continue; 1792 1793 // If no method data exists, go to profile_continue. 1794 test_method_data_pointer(mdp, profile_continue); 1795 1796 // Update the default case count 1797 increment_mdp_data_at(mdp, 1798 in_bytes(MultiBranchData::default_count_offset())); 1799 1800 // The method data pointer needs to be updated. 1801 update_mdp_by_offset(mdp, 1802 in_bytes(MultiBranchData:: 1803 default_displacement_offset())); 1804 1805 bind(profile_continue); 1806 } 1807 } 1808 1809 1810 void InterpreterMacroAssembler::profile_switch_case(Register index, 1811 Register mdp, 1812 Register reg2) { 1813 if (ProfileInterpreter) { 1814 Label profile_continue; 1815 1816 // If no method data exists, go to profile_continue. 1817 test_method_data_pointer(mdp, profile_continue); 1818 1819 // Build the base (index * per_case_size_in_bytes()) + 1820 // case_array_offset_in_bytes() 1821 movl(reg2, in_bytes(MultiBranchData::per_case_size())); 1822 imulptr(index, reg2); // XXX l ? 1823 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? 1824 1825 // Update the case count 1826 increment_mdp_data_at(mdp, 1827 index, 1828 in_bytes(MultiBranchData::relative_count_offset())); 1829 1830 // The method data pointer needs to be updated. 1831 update_mdp_by_offset(mdp, 1832 index, 1833 in_bytes(MultiBranchData:: 1834 relative_displacement_offset())); 1835 1836 bind(profile_continue); 1837 } 1838 } 1839 1840 1841 1842 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 1843 if (state == atos) { 1844 MacroAssembler::verify_oop(reg); 1845 } 1846 } 1847 1848 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 1849 #ifndef _LP64 1850 if ((state == ftos && UseSSE < 1) || 1851 (state == dtos && UseSSE < 2)) { 1852 MacroAssembler::verify_FPU(stack_depth); 1853 } 1854 #endif 1855 } 1856 1857 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. 1858 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 1859 int increment, Address mask, 1860 Register scratch, bool preloaded, 1861 Condition cond, Label* where) { 1862 if (!preloaded) { 1863 movl(scratch, counter_addr); 1864 } 1865 incrementl(scratch, increment); 1866 movl(counter_addr, scratch); 1867 andl(scratch, mask); 1868 jcc(cond, *where); 1869 } 1870 #endif // CC_INTERP 1871 1872 void InterpreterMacroAssembler::notify_method_entry() { 1873 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1874 // track stack depth. If it is possible to enter interp_only_mode we add 1875 // the code to check if the event should be sent. 1876 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1877 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1878 if (JvmtiExport::can_post_interpreter_events()) { 1879 Label L; 1880 NOT_LP64(get_thread(rthread);) 1881 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1882 testl(rdx, rdx); 1883 jcc(Assembler::zero, L); 1884 call_VM(noreg, CAST_FROM_FN_PTR(address, 1885 InterpreterRuntime::post_method_entry)); 1886 bind(L); 1887 } 1888 1889 { 1890 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1891 NOT_LP64(get_thread(rthread);) 1892 get_method(rarg); 1893 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), 1894 rthread, rarg); 1895 } 1896 1897 // RedefineClasses() tracing support for obsolete method entry 1898 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { 1899 NOT_LP64(get_thread(rthread);) 1900 get_method(rarg); 1901 call_VM_leaf( 1902 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 1903 rthread, rarg); 1904 } 1905 } 1906 1907 1908 void InterpreterMacroAssembler::notify_method_exit( 1909 TosState state, NotifyMethodExitMode mode) { 1910 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1911 // track stack depth. If it is possible to enter interp_only_mode we add 1912 // the code to check if the event should be sent. 1913 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1914 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1915 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 1916 Label L; 1917 // Note: frame::interpreter_frame_result has a dependency on how the 1918 // method result is saved across the call to post_method_exit. If this 1919 // is changed then the interpreter_frame_result implementation will 1920 // need to be updated too. 1921 1922 // For c++ interpreter the result is always stored at a known location in the frame 1923 // template interpreter will leave it on the top of the stack. 1924 NOT_CC_INTERP(push(state);) 1925 NOT_LP64(get_thread(rthread);) 1926 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1927 testl(rdx, rdx); 1928 jcc(Assembler::zero, L); 1929 call_VM(noreg, 1930 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 1931 bind(L); 1932 NOT_CC_INTERP(pop(state)); 1933 } 1934 1935 { 1936 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1937 NOT_CC_INTERP(push(state)); 1938 NOT_LP64(get_thread(rthread);) 1939 get_method(rarg); 1940 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 1941 rthread, rarg); 1942 NOT_CC_INTERP(pop(state)); 1943 } 1944 }