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 #ifndef CC_INTERP 44 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) { 45 Label update, next, none; 46 47 verify_oop(obj); 48 49 testptr(obj, obj); 50 jccb(Assembler::notZero, update); 51 orptr(mdo_addr, TypeEntries::null_seen); 52 jmpb(next); 53 54 bind(update); 55 load_klass(obj, obj); 56 57 xorptr(obj, mdo_addr); 58 testptr(obj, TypeEntries::type_klass_mask); 59 jccb(Assembler::zero, next); // klass seen before, nothing to 60 // do. The unknown bit may have been 61 // set already but no need to check. 62 63 testptr(obj, TypeEntries::type_unknown); 64 jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore. 65 66 cmpptr(mdo_addr, 0); 67 jccb(Assembler::equal, none); 68 cmpptr(mdo_addr, TypeEntries::null_seen); 69 jccb(Assembler::equal, none); 70 // There is a chance that the checks above (re-reading profiling 71 // data from memory) fail if another thread has just set the 72 // profiling to this obj's klass 73 xorptr(obj, mdo_addr); 74 testptr(obj, TypeEntries::type_klass_mask); 75 jccb(Assembler::zero, next); 76 77 // different than before. Cannot keep accurate profile. 78 orptr(mdo_addr, TypeEntries::type_unknown); 79 jmpb(next); 80 81 bind(none); 82 // first time here. Set profile type. 83 movptr(mdo_addr, obj); 84 85 bind(next); 86 } 87 88 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) { 89 if (!ProfileInterpreter) { 90 return; 91 } 92 93 if (MethodData::profile_arguments() || MethodData::profile_return()) { 94 Label profile_continue; 95 96 test_method_data_pointer(mdp, profile_continue); 97 98 int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size()); 99 100 cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag); 101 jcc(Assembler::notEqual, profile_continue); 102 103 if (MethodData::profile_arguments()) { 104 Label done; 105 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset()); 106 addptr(mdp, off_to_args); 107 108 for (int i = 0; i < TypeProfileArgsLimit; i++) { 109 if (i > 0 || MethodData::profile_return()) { 110 // If return value type is profiled we may have no argument to profile 111 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 112 subl(tmp, i*TypeStackSlotEntries::per_arg_count()); 113 cmpl(tmp, TypeStackSlotEntries::per_arg_count()); 114 jcc(Assembler::less, done); 115 } 116 movptr(tmp, Address(callee, Method::const_offset())); 117 load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset())); 118 // stack offset o (zero based) from the start of the argument 119 // list, for n arguments translates into offset n - o - 1 from 120 // the end of the argument list 121 subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args)); 122 subl(tmp, 1); 123 Address arg_addr = argument_address(tmp); 124 movptr(tmp, arg_addr); 125 126 Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args); 127 profile_obj_type(tmp, mdo_arg_addr); 128 129 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size()); 130 addptr(mdp, to_add); 131 off_to_args += to_add; 132 } 133 134 if (MethodData::profile_return()) { 135 movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args)); 136 subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count()); 137 } 138 139 bind(done); 140 141 if (MethodData::profile_return()) { 142 // We're right after the type profile for the last 143 // argument. tmp is the number of cells left in the 144 // CallTypeData/VirtualCallTypeData to reach its end. Non null 145 // if there's a return to profile. 146 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type"); 147 shll(tmp, exact_log2(DataLayout::cell_size)); 148 addptr(mdp, tmp); 149 } 150 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp); 151 } else { 152 assert(MethodData::profile_return(), "either profile call args or call ret"); 153 update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size())); 154 } 155 156 // mdp points right after the end of the 157 // CallTypeData/VirtualCallTypeData, right after the cells for the 158 // return value type if there's one 159 160 bind(profile_continue); 161 } 162 } 163 164 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) { 165 assert_different_registers(mdp, ret, tmp, _bcp_register); 166 if (ProfileInterpreter && MethodData::profile_return()) { 167 Label profile_continue, done; 168 169 test_method_data_pointer(mdp, profile_continue); 170 171 if (MethodData::profile_return_jsr292_only()) { 172 // If we don't profile all invoke bytecodes we must make sure 173 // it's a bytecode we indeed profile. We can't go back to the 174 // begining of the ProfileData we intend to update to check its 175 // type because we're right after it and we don't known its 176 // length 177 Label do_profile; 178 cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic); 179 jcc(Assembler::equal, do_profile); 180 cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle); 181 jcc(Assembler::equal, do_profile); 182 get_method(tmp); 183 cmpb(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm); 184 jcc(Assembler::notEqual, profile_continue); 185 186 bind(do_profile); 187 } 188 189 Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size())); 190 mov(tmp, ret); 191 profile_obj_type(tmp, mdo_ret_addr); 192 193 bind(profile_continue); 194 } 195 } 196 197 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) { 198 if (ProfileInterpreter && MethodData::profile_parameters()) { 199 Label profile_continue, done; 200 201 test_method_data_pointer(mdp, profile_continue); 202 203 // Load the offset of the area within the MDO used for 204 // parameters. If it's negative we're not profiling any parameters 205 movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()))); 206 testl(tmp1, tmp1); 207 jcc(Assembler::negative, profile_continue); 208 209 // Compute a pointer to the area for parameters from the offset 210 // and move the pointer to the slot for the last 211 // parameters. Collect profiling from last parameter down. 212 // mdo start + parameters offset + array length - 1 213 addptr(mdp, tmp1); 214 movptr(tmp1, Address(mdp, ArrayData::array_len_offset())); 215 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 216 217 Label loop; 218 bind(loop); 219 220 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0)); 221 int type_base = in_bytes(ParametersTypeData::type_offset(0)); 222 Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size); 223 Address arg_off(mdp, tmp1, per_arg_scale, off_base); 224 Address arg_type(mdp, tmp1, per_arg_scale, type_base); 225 226 // load offset on the stack from the slot for this parameter 227 movptr(tmp2, arg_off); 228 negptr(tmp2); 229 // read the parameter from the local area 230 movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale())); 231 232 // profile the parameter 233 profile_obj_type(tmp2, arg_type); 234 235 // go to next parameter 236 decrement(tmp1, TypeStackSlotEntries::per_arg_count()); 237 jcc(Assembler::positive, loop); 238 239 bind(profile_continue); 240 } 241 } 242 #endif 243 244 #ifdef CC_INTERP 245 void InterpreterMacroAssembler::get_method(Register reg) { 246 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize))); 247 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); 248 } 249 #endif // CC_INTERP 250 251 #ifndef CC_INTERP 252 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, 253 int number_of_arguments) { 254 // interpreter specific 255 // 256 // Note: No need to save/restore bcp & locals registers 257 // since these are callee saved registers and no blocking/ 258 // GC can happen in leaf calls. 259 // Further Note: DO NOT save/restore bcp/locals. If a caller has 260 // already saved them so that it can use rsi/rdi as temporaries 261 // then a save/restore here will DESTROY the copy the caller 262 // saved! There used to be a save_bcp() that only happened in 263 // the ASSERT path (no restore_bcp). Which caused bizarre failures 264 // when jvm built with ASSERTs. 265 #ifdef ASSERT 266 { 267 Label L; 268 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 269 jcc(Assembler::equal, L); 270 stop("InterpreterMacroAssembler::call_VM_leaf_base:" 271 " last_sp != NULL"); 272 bind(L); 273 } 274 #endif 275 // super call 276 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 277 // interpreter specific 278 // LP64: Used to ASSERT that r13/r14 were equal to frame's bcp/locals 279 // but since they may not have been saved (and we don't want to 280 // save them here (see note above) the assert is invalid. 281 } 282 283 void InterpreterMacroAssembler::call_VM_base(Register oop_result, 284 Register java_thread, 285 Register last_java_sp, 286 address entry_point, 287 int number_of_arguments, 288 bool check_exceptions) { 289 // interpreter specific 290 // 291 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't 292 // really make a difference for these runtime calls, since they are 293 // slow anyway. Btw., bcp must be saved/restored since it may change 294 // due to GC. 295 NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");) 296 save_bcp(); 297 #ifdef ASSERT 298 { 299 Label L; 300 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 301 jcc(Assembler::equal, L); 302 stop("InterpreterMacroAssembler::call_VM_leaf_base:" 303 " last_sp != NULL"); 304 bind(L); 305 } 306 #endif /* ASSERT */ 307 // super call 308 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, 309 entry_point, number_of_arguments, 310 check_exceptions); 311 // interpreter specific 312 restore_bcp(); 313 restore_locals(); 314 } 315 316 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { 317 if (JvmtiExport::can_pop_frame()) { 318 Label L; 319 // Initiate popframe handling only if it is not already being 320 // processed. If the flag has the popframe_processing bit set, it 321 // means that this code is called *during* popframe handling - we 322 // don't want to reenter. 323 // This method is only called just after the call into the vm in 324 // call_VM_base, so the arg registers are available. 325 Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit 326 LP64_ONLY(c_rarg0); 327 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset())); 328 testl(pop_cond, JavaThread::popframe_pending_bit); 329 jcc(Assembler::zero, L); 330 testl(pop_cond, JavaThread::popframe_processing_bit); 331 jcc(Assembler::notZero, L); 332 // Call Interpreter::remove_activation_preserving_args_entry() to get the 333 // address of the same-named entrypoint in the generated interpreter code. 334 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); 335 jmp(rax); 336 bind(L); 337 NOT_LP64(get_thread(java_thread);) 338 } 339 } 340 341 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { 342 Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 343 NOT_LP64(get_thread(thread);) 344 movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 345 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); 346 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); 347 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); 348 #ifdef _LP64 349 switch (state) { 350 case atos: movptr(rax, oop_addr); 351 movptr(oop_addr, (int32_t)NULL_WORD); 352 verify_oop(rax, state); break; 353 case ltos: movptr(rax, val_addr); break; 354 case btos: // fall through 355 case ctos: // fall through 356 case stos: // fall through 357 case itos: movl(rax, val_addr); break; 358 case ftos: movflt(xmm0, val_addr); break; 359 case dtos: movdbl(xmm0, val_addr); break; 360 case vtos: /* nothing to do */ break; 361 default : ShouldNotReachHere(); 362 } 363 // Clean up tos value in the thread object 364 movl(tos_addr, (int) ilgl); 365 movl(val_addr, (int32_t) NULL_WORD); 366 #else 367 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() 368 + in_ByteSize(wordSize)); 369 switch (state) { 370 case atos: movptr(rax, oop_addr); 371 movptr(oop_addr, NULL_WORD); 372 verify_oop(rax, state); break; 373 case ltos: 374 movl(rdx, val_addr1); // fall through 375 case btos: // fall through 376 case ctos: // fall through 377 case stos: // fall through 378 case itos: movl(rax, val_addr); break; 379 case ftos: fld_s(val_addr); break; 380 case dtos: fld_d(val_addr); break; 381 case vtos: /* nothing to do */ break; 382 default : ShouldNotReachHere(); 383 } 384 #endif // _LP64 385 // Clean up tos value in the thread object 386 movl(tos_addr, (int32_t) ilgl); 387 movptr(val_addr, NULL_WORD); 388 NOT_LP64(movptr(val_addr1, NULL_WORD);) 389 } 390 391 392 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { 393 if (JvmtiExport::can_force_early_return()) { 394 Label L; 395 Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread); 396 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread); 397 398 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 399 testptr(tmp, tmp); 400 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; 401 402 // Initiate earlyret handling only if it is not already being processed. 403 // If the flag has the earlyret_processing bit set, it means that this code 404 // is called *during* earlyret handling - we don't want to reenter. 405 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset())); 406 cmpl(tmp, JvmtiThreadState::earlyret_pending); 407 jcc(Assembler::notEqual, L); 408 409 // Call Interpreter::remove_activation_early_entry() to get the address of the 410 // same-named entrypoint in the generated interpreter code. 411 NOT_LP64(get_thread(java_thread);) 412 movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset())); 413 #ifdef _LP64 414 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 415 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp); 416 #else 417 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 418 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1); 419 #endif // _LP64 420 jmp(rax); 421 bind(L); 422 NOT_LP64(get_thread(java_thread);) 423 } 424 } 425 426 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) { 427 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); 428 load_unsigned_short(reg, Address(_bcp_register, bcp_offset)); 429 bswapl(reg); 430 shrl(reg, 16); 431 } 432 433 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, 434 int bcp_offset, 435 size_t index_size) { 436 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); 437 if (index_size == sizeof(u2)) { 438 load_unsigned_short(index, Address(_bcp_register, bcp_offset)); 439 } else if (index_size == sizeof(u4)) { 440 movl(index, Address(_bcp_register, bcp_offset)); 441 // Check if the secondary index definition is still ~x, otherwise 442 // we have to change the following assembler code to calculate the 443 // plain index. 444 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); 445 notl(index); // convert to plain index 446 } else if (index_size == sizeof(u1)) { 447 load_unsigned_byte(index, Address(_bcp_register, bcp_offset)); 448 } else { 449 ShouldNotReachHere(); 450 } 451 } 452 453 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, 454 Register index, 455 int bcp_offset, 456 size_t index_size) { 457 assert_different_registers(cache, index); 458 get_cache_index_at_bcp(index, bcp_offset, index_size); 459 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 460 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 461 // convert from field index to ConstantPoolCacheEntry index 462 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); 463 shll(index, 2); 464 } 465 466 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, 467 Register index, 468 Register bytecode, 469 int byte_no, 470 int bcp_offset, 471 size_t index_size) { 472 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); 473 // We use a 32-bit load here since the layout of 64-bit words on 474 // little-endian machines allow us that. 475 movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); 476 const int shift_count = (1 + byte_no) * BitsPerByte; 477 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || 478 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), 479 "correct shift count"); 480 shrl(bytecode, shift_count); 481 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); 482 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); 483 } 484 485 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, 486 Register tmp, 487 int bcp_offset, 488 size_t index_size) { 489 assert(cache != tmp, "must use different register"); 490 get_cache_index_at_bcp(tmp, bcp_offset, index_size); 491 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 492 // convert from field index to ConstantPoolCacheEntry index 493 // and from word offset to byte offset 494 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); 495 shll(tmp, 2 + LogBytesPerWord); 496 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 497 // skip past the header 498 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 499 addptr(cache, tmp); // construct pointer to cache entry 500 } 501 502 // Load object from cpool->resolved_references(index) 503 void InterpreterMacroAssembler::load_resolved_reference_at_index( 504 Register result, Register index) { 505 assert_different_registers(result, index); 506 // convert from field index to resolved_references() index and from 507 // word index to byte offset. Since this is a java object, it can be compressed 508 Register tmp = index; // reuse 509 shll(tmp, LogBytesPerHeapOop); 510 511 get_constant_pool(result); 512 // load pointer for resolved_references[] objArray 513 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); 514 // JNIHandles::resolve(obj); 515 movptr(result, Address(result, 0)); 516 // Add in the index 517 addptr(result, tmp); 518 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 519 } 520 521 522 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a 523 // subtype of super_klass. 524 // 525 // Args: 526 // rax: superklass 527 // Rsub_klass: subklass 528 // 529 // Kills: 530 // rcx, rdi 531 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, 532 Label& ok_is_subtype) { 533 assert(Rsub_klass != rax, "rax holds superklass"); 534 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");) 535 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");) 536 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); 537 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); 538 539 // Profile the not-null value's klass. 540 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 541 542 // Do the check. 543 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 544 545 // Profile the failure of the check. 546 profile_typecheck_failed(rcx); // blows rcx 547 } 548 549 550 #ifndef _LP64 551 void InterpreterMacroAssembler::f2ieee() { 552 if (IEEEPrecision) { 553 fstp_s(Address(rsp, 0)); 554 fld_s(Address(rsp, 0)); 555 } 556 } 557 558 559 void InterpreterMacroAssembler::d2ieee() { 560 if (IEEEPrecision) { 561 fstp_d(Address(rsp, 0)); 562 fld_d(Address(rsp, 0)); 563 } 564 } 565 #endif // _LP64 566 567 // Java Expression Stack 568 569 void InterpreterMacroAssembler::pop_ptr(Register r) { 570 pop(r); 571 } 572 573 void InterpreterMacroAssembler::push_ptr(Register r) { 574 push(r); 575 } 576 577 void InterpreterMacroAssembler::push_i(Register r) { 578 push(r); 579 } 580 581 #ifdef _LP64 582 void InterpreterMacroAssembler::pop_i(Register r) { 583 // XXX can't use pop currently, upper half non clean 584 movl(r, Address(rsp, 0)); 585 addptr(rsp, wordSize); 586 } 587 588 void InterpreterMacroAssembler::pop_l(Register r) { 589 movq(r, Address(rsp, 0)); 590 addptr(rsp, 2 * Interpreter::stackElementSize); 591 } 592 593 void InterpreterMacroAssembler::pop_f(XMMRegister r) { 594 movflt(r, Address(rsp, 0)); 595 addptr(rsp, wordSize); 596 } 597 598 void InterpreterMacroAssembler::pop_d(XMMRegister r) { 599 movdbl(r, Address(rsp, 0)); 600 addptr(rsp, 2 * Interpreter::stackElementSize); 601 } 602 603 void InterpreterMacroAssembler::push_l(Register r) { 604 subptr(rsp, 2 * wordSize); 605 movq(Address(rsp, 0), r); 606 } 607 608 void InterpreterMacroAssembler::push_f(XMMRegister r) { 609 subptr(rsp, wordSize); 610 movflt(Address(rsp, 0), r); 611 } 612 613 void InterpreterMacroAssembler::push_d(XMMRegister r) { 614 subptr(rsp, 2 * wordSize); 615 movdbl(Address(rsp, 0), r); 616 } 617 618 void InterpreterMacroAssembler::pop(TosState state) { 619 switch (state) { 620 case atos: pop_ptr(); break; 621 case btos: 622 case ctos: 623 case stos: 624 case itos: pop_i(); break; 625 case ltos: pop_l(); break; 626 case ftos: pop_f(); break; 627 case dtos: pop_d(); break; 628 case vtos: /* nothing to do */ break; 629 default: ShouldNotReachHere(); 630 } 631 verify_oop(rax, state); 632 } 633 634 void InterpreterMacroAssembler::push(TosState state) { 635 verify_oop(rax, state); 636 switch (state) { 637 case atos: push_ptr(); break; 638 case btos: 639 case ctos: 640 case stos: 641 case itos: push_i(); break; 642 case ltos: push_l(); break; 643 case ftos: push_f(); break; 644 case dtos: push_d(); break; 645 case vtos: /* nothing to do */ break; 646 default : ShouldNotReachHere(); 647 } 648 } 649 #else 650 void InterpreterMacroAssembler::pop_i(Register r) { 651 pop(r); 652 } 653 654 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 655 pop(lo); 656 pop(hi); 657 } 658 659 void InterpreterMacroAssembler::pop_f() { 660 fld_s(Address(rsp, 0)); 661 addptr(rsp, 1 * wordSize); 662 } 663 664 void InterpreterMacroAssembler::pop_d() { 665 fld_d(Address(rsp, 0)); 666 addptr(rsp, 2 * wordSize); 667 } 668 669 670 void InterpreterMacroAssembler::pop(TosState state) { 671 switch (state) { 672 case atos: pop_ptr(rax); break; 673 case btos: // fall through 674 case ctos: // fall through 675 case stos: // fall through 676 case itos: pop_i(rax); break; 677 case ltos: pop_l(rax, rdx); break; 678 case ftos: pop_f(); break; 679 case dtos: pop_d(); break; 680 case vtos: /* nothing to do */ break; 681 default : ShouldNotReachHere(); 682 } 683 verify_oop(rax, state); 684 } 685 686 687 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 688 push(hi); 689 push(lo); 690 } 691 692 void InterpreterMacroAssembler::push_f() { 693 // Do not schedule for no AGI! Never write beyond rsp! 694 subptr(rsp, 1 * wordSize); 695 fstp_s(Address(rsp, 0)); 696 } 697 698 void InterpreterMacroAssembler::push_d(Register r) { 699 // Do not schedule for no AGI! Never write beyond rsp! 700 subptr(rsp, 2 * wordSize); 701 fstp_d(Address(rsp, 0)); 702 } 703 704 705 void InterpreterMacroAssembler::push(TosState state) { 706 verify_oop(rax, state); 707 switch (state) { 708 case atos: push_ptr(rax); break; 709 case btos: // fall through 710 case ctos: // fall through 711 case stos: // fall through 712 case itos: push_i(rax); break; 713 case ltos: push_l(rax, rdx); break; 714 case ftos: push_f(); break; 715 case dtos: push_d(rax); break; 716 case vtos: /* nothing to do */ break; 717 default : ShouldNotReachHere(); 718 } 719 } 720 #endif // _LP64 721 722 723 // Helpers for swap and dup 724 void InterpreterMacroAssembler::load_ptr(int n, Register val) { 725 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 726 } 727 728 void InterpreterMacroAssembler::store_ptr(int n, Register val) { 729 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 730 } 731 732 733 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 734 // set sender sp 735 lea(_bcp_register, Address(rsp, wordSize)); 736 // record last_sp 737 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register); 738 } 739 740 741 // Jump to from_interpreted entry of a call unless single stepping is possible 742 // in this thread in which case we must call the i2i entry 743 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 744 prepare_to_jump_from_interpreted(); 745 746 if (JvmtiExport::can_post_interpreter_events()) { 747 Label run_compiled_code; 748 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 749 // compiled code in threads for which the event is enabled. Check here for 750 // interp_only_mode if these events CAN be enabled. 751 // interp_only is an int, on little endian it is sufficient to test the byte only 752 // Is a cmpl faster? 753 LP64_ONLY(temp = r15_thread;) 754 NOT_LP64(get_thread(temp);) 755 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 756 jccb(Assembler::zero, run_compiled_code); 757 jmp(Address(method, Method::interpreter_entry_offset())); 758 bind(run_compiled_code); 759 } 760 761 jmp(Address(method, Method::from_interpreted_offset())); 762 } 763 764 // The following two routines provide a hook so that an implementation 765 // can schedule the dispatch in two parts. x86 does not do this. 766 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 767 // Nothing x86 specific to be done here 768 } 769 770 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 771 dispatch_next(state, step); 772 } 773 774 void InterpreterMacroAssembler::dispatch_base(TosState state, 775 address* table, 776 bool verifyoop) { 777 verify_FPU(1, state); 778 if (VerifyActivationFrameSize) { 779 Label L; 780 mov(rcx, rbp); 781 subptr(rcx, rsp); 782 int32_t min_frame_size = 783 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * 784 wordSize; 785 cmpptr(rcx, (int32_t)min_frame_size); 786 jcc(Assembler::greaterEqual, L); 787 stop("broken stack frame"); 788 bind(L); 789 } 790 if (verifyoop) { 791 verify_oop(rax, state); 792 } 793 #ifdef _LP64 794 lea(rscratch1, ExternalAddress((address)table)); 795 jmp(Address(rscratch1, rbx, Address::times_8)); 796 #else 797 Address index(noreg, rbx, Address::times_ptr); 798 ExternalAddress tbl((address)table); 799 ArrayAddress dispatch(tbl, index); 800 jump(dispatch); 801 #endif // _LP64 802 } 803 804 void InterpreterMacroAssembler::dispatch_only(TosState state) { 805 dispatch_base(state, Interpreter::dispatch_table(state)); 806 } 807 808 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 809 dispatch_base(state, Interpreter::normal_table(state)); 810 } 811 812 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 813 dispatch_base(state, Interpreter::normal_table(state), false); 814 } 815 816 817 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { 818 // load next bytecode (load before advancing _bcp_register to prevent AGI) 819 load_unsigned_byte(rbx, Address(_bcp_register, step)); 820 // advance _bcp_register 821 increment(_bcp_register, step); 822 dispatch_base(state, Interpreter::dispatch_table(state)); 823 } 824 825 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 826 // load current bytecode 827 load_unsigned_byte(rbx, Address(_bcp_register, 0)); 828 dispatch_base(state, table); 829 } 830 831 // remove activation 832 // 833 // Unlock the receiver if this is a synchronized method. 834 // Unlock any Java monitors from syncronized blocks. 835 // Remove the activation from the stack. 836 // 837 // If there are locked Java monitors 838 // If throw_monitor_exception 839 // throws IllegalMonitorStateException 840 // Else if install_monitor_exception 841 // installs IllegalMonitorStateException 842 // Else 843 // no error processing 844 void InterpreterMacroAssembler::remove_activation( 845 TosState state, 846 Register ret_addr, 847 bool throw_monitor_exception, 848 bool install_monitor_exception, 849 bool notify_jvmdi) { 850 // Note: Registers rdx xmm0 may be in use for the 851 // result check if synchronized method 852 Label unlocked, unlock, no_unlock; 853 854 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 855 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 856 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 857 // monitor pointers need different register 858 // because rdx may have the result in it 859 NOT_LP64(get_thread(rcx);) 860 861 // get the value of _do_not_unlock_if_synchronized into rdx 862 const Address do_not_unlock_if_synchronized(rthread, 863 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 864 movbool(rbx, do_not_unlock_if_synchronized); 865 movbool(do_not_unlock_if_synchronized, false); // reset the flag 866 867 // get method access flags 868 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 869 movl(rcx, Address(rcx, Method::access_flags_offset())); 870 testl(rcx, JVM_ACC_SYNCHRONIZED); 871 jcc(Assembler::zero, unlocked); 872 873 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 874 // is set. 875 testbool(rbx); 876 jcc(Assembler::notZero, no_unlock); 877 878 // unlock monitor 879 push(state); // save result 880 881 // BasicObjectLock will be first in list, since this is a 882 // synchronized method. However, need to check that the object has 883 // not been unlocked by an explicit monitorexit bytecode. 884 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * 885 wordSize - (int) sizeof(BasicObjectLock)); 886 // We use c_rarg1/rdx so that if we go slow path it will be the correct 887 // register for unlock_object to pass to VM directly 888 lea(robj, monitor); // address of first monitor 889 890 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes())); 891 testptr(rax, rax); 892 jcc(Assembler::notZero, unlock); 893 894 pop(state); 895 if (throw_monitor_exception) { 896 // Entry already unlocked, need to throw exception 897 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow 898 call_VM(noreg, CAST_FROM_FN_PTR(address, 899 InterpreterRuntime::throw_illegal_monitor_state_exception)); 900 should_not_reach_here(); 901 } else { 902 // Monitor already unlocked during a stack unroll. If requested, 903 // install an illegal_monitor_state_exception. Continue with 904 // stack unrolling. 905 if (install_monitor_exception) { 906 NOT_LP64(empty_FPU_stack();) 907 call_VM(noreg, CAST_FROM_FN_PTR(address, 908 InterpreterRuntime::new_illegal_monitor_state_exception)); 909 } 910 jmp(unlocked); 911 } 912 913 bind(unlock); 914 unlock_object(robj); 915 pop(state); 916 917 // Check that for block-structured locking (i.e., that all locked 918 // objects has been unlocked) 919 bind(unlocked); 920 921 // rax, rdx: Might contain return value 922 923 // Check that all monitors are unlocked 924 { 925 Label loop, exception, entry, restart; 926 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 927 const Address monitor_block_top( 928 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 929 const Address monitor_block_bot( 930 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 931 932 bind(restart); 933 // We use c_rarg1 so that if we go slow path it will be the correct 934 // register for unlock_object to pass to VM directly 935 movptr(rmon, monitor_block_top); // points to current entry, starting 936 // with top-most entry 937 lea(rbx, monitor_block_bot); // points to word before bottom of 938 // monitor block 939 jmp(entry); 940 941 // Entry already locked, need to throw exception 942 bind(exception); 943 944 if (throw_monitor_exception) { 945 // Throw exception 946 NOT_LP64(empty_FPU_stack();) 947 MacroAssembler::call_VM(noreg, 948 CAST_FROM_FN_PTR(address, InterpreterRuntime:: 949 throw_illegal_monitor_state_exception)); 950 should_not_reach_here(); 951 } else { 952 // Stack unrolling. Unlock object and install illegal_monitor_exception. 953 // Unlock does not block, so don't have to worry about the frame. 954 // We don't have to preserve c_rarg1 since we are going to throw an exception. 955 956 push(state); 957 mov(robj, rmon); // nop if robj and rmon are the same 958 unlock_object(robj); 959 pop(state); 960 961 if (install_monitor_exception) { 962 NOT_LP64(empty_FPU_stack();) 963 call_VM(noreg, CAST_FROM_FN_PTR(address, 964 InterpreterRuntime:: 965 new_illegal_monitor_state_exception)); 966 } 967 968 jmp(restart); 969 } 970 971 bind(loop); 972 // check if current entry is used 973 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); 974 jcc(Assembler::notEqual, exception); 975 976 addptr(rmon, entry_size); // otherwise advance to next entry 977 bind(entry); 978 cmpptr(rmon, rbx); // check if bottom reached 979 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 980 } 981 982 bind(no_unlock); 983 984 // jvmti support 985 if (notify_jvmdi) { 986 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 987 } else { 988 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 989 } 990 991 // remove activation 992 // get sender sp 993 movptr(rbx, 994 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 995 leave(); // remove frame anchor 996 pop(ret_addr); // get return address 997 mov(rsp, rbx); // set sp to sender sp 998 #ifndef _LP64 999 if (UseSSE) { 1000 // float and double are returned in xmm register in SSE-mode 1001 if (state == ftos && UseSSE >= 1) { 1002 subptr(rsp, wordSize); 1003 fstp_s(Address(rsp, 0)); 1004 movflt(xmm0, Address(rsp, 0)); 1005 addptr(rsp, wordSize); 1006 } else if (state == dtos && UseSSE >= 2) { 1007 subptr(rsp, 2*wordSize); 1008 fstp_d(Address(rsp, 0)); 1009 movdbl(xmm0, Address(rsp, 0)); 1010 addptr(rsp, 2*wordSize); 1011 } 1012 } 1013 #endif // _LP64 1014 } 1015 #endif // !CC_INTERP 1016 1017 void InterpreterMacroAssembler::get_method_counters(Register method, 1018 Register mcs, Label& skip) { 1019 Label has_counters; 1020 movptr(mcs, Address(method, Method::method_counters_offset())); 1021 testptr(mcs, mcs); 1022 jcc(Assembler::notZero, has_counters); 1023 call_VM(noreg, CAST_FROM_FN_PTR(address, 1024 InterpreterRuntime::build_method_counters), method); 1025 movptr(mcs, Address(method,Method::method_counters_offset())); 1026 testptr(mcs, mcs); 1027 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory 1028 bind(has_counters); 1029 } 1030 1031 1032 // Lock object 1033 // 1034 // Args: 1035 // rdx, c_rarg1: BasicObjectLock to be used for locking 1036 // 1037 // Kills: 1038 // rax, rbx 1039 void InterpreterMacroAssembler::lock_object(Register lock_reg) { 1040 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1041 "The argument is only for looks. It must be c_rarg1"); 1042 1043 if (UseHeavyMonitors) { 1044 call_VM(noreg, 1045 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1046 lock_reg); 1047 } else { 1048 Label done; 1049 1050 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1051 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a 1052 // problematic case where tmp_reg = no_reg. 1053 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1054 1055 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 1056 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 1057 const int mark_offset = lock_offset + 1058 BasicLock::displaced_header_offset_in_bytes(); 1059 1060 Label slow_case; 1061 1062 // Load object pointer into obj_reg 1063 movptr(obj_reg, Address(lock_reg, obj_offset)); 1064 1065 if (UseBiasedLocking) { 1066 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case); 1067 } 1068 1069 // Load immediate 1 into swap_reg %rax 1070 movl(swap_reg, (int32_t)1); 1071 1072 // Load (object->mark() | 1) into swap_reg %rax 1073 orptr(swap_reg, Address(obj_reg, 0)); 1074 1075 // Save (object->mark() | 1) into BasicLock's displaced header 1076 movptr(Address(lock_reg, mark_offset), swap_reg); 1077 1078 assert(lock_offset == 0, 1079 "displached header must be first word in BasicObjectLock"); 1080 1081 if (os::is_MP()) lock(); 1082 cmpxchgptr(lock_reg, Address(obj_reg, 0)); 1083 if (PrintBiasedLockingStatistics) { 1084 cond_inc32(Assembler::zero, 1085 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1086 } 1087 jcc(Assembler::zero, done); 1088 1089 const int zero_bits = LP64_ONLY(7) NOT_LP64(3); 1090 1091 // Test if the oopMark is an obvious stack pointer, i.e., 1092 // 1) (mark & zero_bits) == 0, and 1093 // 2) rsp <= mark < mark + os::pagesize() 1094 // 1095 // These 3 tests can be done by evaluating the following 1096 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())), 1097 // assuming both stack pointer and pagesize have their 1098 // least significant bits clear. 1099 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg 1100 subptr(swap_reg, rsp); 1101 andptr(swap_reg, zero_bits - os::vm_page_size()); 1102 1103 // Save the test result, for recursive case, the result is zero 1104 movptr(Address(lock_reg, mark_offset), swap_reg); 1105 1106 if (PrintBiasedLockingStatistics) { 1107 cond_inc32(Assembler::zero, 1108 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1109 } 1110 jcc(Assembler::zero, done); 1111 1112 bind(slow_case); 1113 1114 // Call the runtime routine for slow case 1115 call_VM(noreg, 1116 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1117 lock_reg); 1118 1119 bind(done); 1120 } 1121 } 1122 1123 1124 // Unlocks an object. Used in monitorexit bytecode and 1125 // remove_activation. Throws an IllegalMonitorException if object is 1126 // not locked by current thread. 1127 // 1128 // Args: 1129 // rdx, c_rarg1: BasicObjectLock for lock 1130 // 1131 // Kills: 1132 // rax 1133 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) 1134 // rscratch1, rscratch2 (scratch regs) 1135 // rax, rbx, rcx, rdx 1136 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 1137 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1138 "The argument is only for looks. It must be c_rarg1"); 1139 1140 if (UseHeavyMonitors) { 1141 call_VM(noreg, 1142 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1143 lock_reg); 1144 } else { 1145 Label done; 1146 1147 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1148 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark 1149 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1150 1151 save_bcp(); // Save in case of exception 1152 1153 // Convert from BasicObjectLock structure to object and BasicLock 1154 // structure Store the BasicLock address into %rax 1155 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 1156 1157 // Load oop into obj_reg(%c_rarg3) 1158 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); 1159 1160 // Free entry 1161 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); 1162 1163 if (UseBiasedLocking) { 1164 biased_locking_exit(obj_reg, header_reg, done); 1165 } 1166 1167 // Load the old header from BasicLock structure 1168 movptr(header_reg, Address(swap_reg, 1169 BasicLock::displaced_header_offset_in_bytes())); 1170 1171 // Test for recursion 1172 testptr(header_reg, header_reg); 1173 1174 // zero for recursive case 1175 jcc(Assembler::zero, done); 1176 1177 // Atomic swap back the old header 1178 if (os::is_MP()) lock(); 1179 cmpxchgptr(header_reg, Address(obj_reg, 0)); 1180 1181 // zero for recursive case 1182 jcc(Assembler::zero, done); 1183 1184 // Call the runtime routine for slow case. 1185 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), 1186 obj_reg); // restore obj 1187 call_VM(noreg, 1188 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1189 lock_reg); 1190 1191 bind(done); 1192 1193 restore_bcp(); 1194 } 1195 } 1196 #ifndef CC_INTERP 1197 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, 1198 Label& zero_continue) { 1199 assert(ProfileInterpreter, "must be profiling interpreter"); 1200 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize)); 1201 testptr(mdp, mdp); 1202 jcc(Assembler::zero, zero_continue); 1203 } 1204 1205 1206 // Set the method data pointer for the current bcp. 1207 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1208 assert(ProfileInterpreter, "must be profiling interpreter"); 1209 Label set_mdp; 1210 push(rax); 1211 push(rbx); 1212 1213 get_method(rbx); 1214 // Test MDO to avoid the call if it is NULL. 1215 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 1216 testptr(rax, rax); 1217 jcc(Assembler::zero, set_mdp); 1218 // rbx: method 1219 // _bcp_register: bcp 1220 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register); 1221 // rax: mdi 1222 // mdo is guaranteed to be non-zero here, we checked for it before the call. 1223 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 1224 addptr(rbx, in_bytes(MethodData::data_offset())); 1225 addptr(rax, rbx); 1226 bind(set_mdp); 1227 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax); 1228 pop(rbx); 1229 pop(rax); 1230 } 1231 1232 void InterpreterMacroAssembler::verify_method_data_pointer() { 1233 assert(ProfileInterpreter, "must be profiling interpreter"); 1234 #ifdef ASSERT 1235 Label verify_continue; 1236 push(rax); 1237 push(rbx); 1238 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 1239 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 1240 push(arg3_reg); 1241 push(arg2_reg); 1242 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue 1243 get_method(rbx); 1244 1245 // If the mdp is valid, it will point to a DataLayout header which is 1246 // consistent with the bcp. The converse is highly probable also. 1247 load_unsigned_short(arg2_reg, 1248 Address(arg3_reg, in_bytes(DataLayout::bci_offset()))); 1249 addptr(arg2_reg, Address(rbx, Method::const_offset())); 1250 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset())); 1251 cmpptr(arg2_reg, _bcp_register); 1252 jcc(Assembler::equal, verify_continue); 1253 // rbx: method 1254 // _bcp_register: bcp 1255 // c_rarg3: mdp 1256 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), 1257 rbx, _bcp_register, arg3_reg); 1258 bind(verify_continue); 1259 pop(arg2_reg); 1260 pop(arg3_reg); 1261 pop(rbx); 1262 pop(rax); 1263 #endif // ASSERT 1264 } 1265 1266 1267 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, 1268 int constant, 1269 Register value) { 1270 assert(ProfileInterpreter, "must be profiling interpreter"); 1271 Address data(mdp_in, constant); 1272 movptr(data, value); 1273 } 1274 1275 1276 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1277 int constant, 1278 bool decrement) { 1279 // Counter address 1280 Address data(mdp_in, constant); 1281 1282 increment_mdp_data_at(data, decrement); 1283 } 1284 1285 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 1286 bool decrement) { 1287 assert(ProfileInterpreter, "must be profiling interpreter"); 1288 // %%% this does 64bit counters at best it is wasting space 1289 // at worst it is a rare bug when counters overflow 1290 1291 if (decrement) { 1292 // Decrement the register. Set condition codes. 1293 addptr(data, (int32_t) -DataLayout::counter_increment); 1294 // If the decrement causes the counter to overflow, stay negative 1295 Label L; 1296 jcc(Assembler::negative, L); 1297 addptr(data, (int32_t) DataLayout::counter_increment); 1298 bind(L); 1299 } else { 1300 assert(DataLayout::counter_increment == 1, 1301 "flow-free idiom only works with 1"); 1302 // Increment the register. Set carry flag. 1303 addptr(data, DataLayout::counter_increment); 1304 // If the increment causes the counter to overflow, pull back by 1. 1305 sbbptr(data, (int32_t)0); 1306 } 1307 } 1308 1309 1310 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1311 Register reg, 1312 int constant, 1313 bool decrement) { 1314 Address data(mdp_in, reg, Address::times_1, constant); 1315 1316 increment_mdp_data_at(data, decrement); 1317 } 1318 1319 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, 1320 int flag_byte_constant) { 1321 assert(ProfileInterpreter, "must be profiling interpreter"); 1322 int header_offset = in_bytes(DataLayout::header_offset()); 1323 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); 1324 // Set the flag 1325 orl(Address(mdp_in, header_offset), header_bits); 1326 } 1327 1328 1329 1330 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 1331 int offset, 1332 Register value, 1333 Register test_value_out, 1334 Label& not_equal_continue) { 1335 assert(ProfileInterpreter, "must be profiling interpreter"); 1336 if (test_value_out == noreg) { 1337 cmpptr(value, Address(mdp_in, offset)); 1338 } else { 1339 // Put the test value into a register, so caller can use it: 1340 movptr(test_value_out, Address(mdp_in, offset)); 1341 cmpptr(test_value_out, value); 1342 } 1343 jcc(Assembler::notEqual, not_equal_continue); 1344 } 1345 1346 1347 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1348 int offset_of_disp) { 1349 assert(ProfileInterpreter, "must be profiling interpreter"); 1350 Address disp_address(mdp_in, offset_of_disp); 1351 addptr(mdp_in, disp_address); 1352 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1353 } 1354 1355 1356 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1357 Register reg, 1358 int offset_of_disp) { 1359 assert(ProfileInterpreter, "must be profiling interpreter"); 1360 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 1361 addptr(mdp_in, disp_address); 1362 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1363 } 1364 1365 1366 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, 1367 int constant) { 1368 assert(ProfileInterpreter, "must be profiling interpreter"); 1369 addptr(mdp_in, constant); 1370 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1371 } 1372 1373 1374 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 1375 assert(ProfileInterpreter, "must be profiling interpreter"); 1376 push(return_bci); // save/restore across call_VM 1377 call_VM(noreg, 1378 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), 1379 return_bci); 1380 pop(return_bci); 1381 } 1382 1383 1384 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, 1385 Register bumped_count) { 1386 if (ProfileInterpreter) { 1387 Label profile_continue; 1388 1389 // If no method data exists, go to profile_continue. 1390 // Otherwise, assign to mdp 1391 test_method_data_pointer(mdp, profile_continue); 1392 1393 // We are taking a branch. Increment the taken count. 1394 // We inline increment_mdp_data_at to return bumped_count in a register 1395 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1396 Address data(mdp, in_bytes(JumpData::taken_offset())); 1397 movptr(bumped_count, data); 1398 assert(DataLayout::counter_increment == 1, 1399 "flow-free idiom only works with 1"); 1400 addptr(bumped_count, DataLayout::counter_increment); 1401 sbbptr(bumped_count, 0); 1402 movptr(data, bumped_count); // Store back out 1403 1404 // The method data pointer needs to be updated to reflect the new target. 1405 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1406 bind(profile_continue); 1407 } 1408 } 1409 1410 1411 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1412 if (ProfileInterpreter) { 1413 Label profile_continue; 1414 1415 // If no method data exists, go to profile_continue. 1416 test_method_data_pointer(mdp, profile_continue); 1417 1418 // We are taking a branch. Increment the not taken count. 1419 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1420 1421 // The method data pointer needs to be updated to correspond to 1422 // the next bytecode 1423 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1424 bind(profile_continue); 1425 } 1426 } 1427 1428 void InterpreterMacroAssembler::profile_call(Register mdp) { 1429 if (ProfileInterpreter) { 1430 Label profile_continue; 1431 1432 // If no method data exists, go to profile_continue. 1433 test_method_data_pointer(mdp, profile_continue); 1434 1435 // We are making a call. Increment the count. 1436 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1437 1438 // The method data pointer needs to be updated to reflect the new target. 1439 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1440 bind(profile_continue); 1441 } 1442 } 1443 1444 1445 void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1446 if (ProfileInterpreter) { 1447 Label profile_continue; 1448 1449 // If no method data exists, go to profile_continue. 1450 test_method_data_pointer(mdp, profile_continue); 1451 1452 // We are making a call. Increment the count. 1453 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1454 1455 // The method data pointer needs to be updated to reflect the new target. 1456 update_mdp_by_constant(mdp, 1457 in_bytes(VirtualCallData:: 1458 virtual_call_data_size())); 1459 bind(profile_continue); 1460 } 1461 } 1462 1463 1464 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, 1465 Register mdp, 1466 Register reg2, 1467 bool receiver_can_be_null) { 1468 if (ProfileInterpreter) { 1469 Label profile_continue; 1470 1471 // If no method data exists, go to profile_continue. 1472 test_method_data_pointer(mdp, profile_continue); 1473 1474 Label skip_receiver_profile; 1475 if (receiver_can_be_null) { 1476 Label not_null; 1477 testptr(receiver, receiver); 1478 jccb(Assembler::notZero, not_null); 1479 // We are making a call. Increment the count for null receiver. 1480 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1481 jmp(skip_receiver_profile); 1482 bind(not_null); 1483 } 1484 1485 // Record the receiver type. 1486 record_klass_in_profile(receiver, mdp, reg2, true); 1487 bind(skip_receiver_profile); 1488 1489 // The method data pointer needs to be updated to reflect the new target. 1490 update_mdp_by_constant(mdp, 1491 in_bytes(VirtualCallData:: 1492 virtual_call_data_size())); 1493 bind(profile_continue); 1494 } 1495 } 1496 1497 // This routine creates a state machine for updating the multi-row 1498 // type profile at a virtual call site (or other type-sensitive bytecode). 1499 // The machine visits each row (of receiver/count) until the receiver type 1500 // is found, or until it runs out of rows. At the same time, it remembers 1501 // the location of the first empty row. (An empty row records null for its 1502 // receiver, and can be allocated for a newly-observed receiver type.) 1503 // Because there are two degrees of freedom in the state, a simple linear 1504 // search will not work; it must be a decision tree. Hence this helper 1505 // function is recursive, to generate the required tree structured code. 1506 // It's the interpreter, so we are trading off code space for speed. 1507 // See below for example code. 1508 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1509 Register receiver, Register mdp, 1510 Register reg2, int start_row, 1511 Label& done, bool is_virtual_call) { 1512 if (TypeProfileWidth == 0) { 1513 if (is_virtual_call) { 1514 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1515 } 1516 return; 1517 } 1518 1519 int last_row = VirtualCallData::row_limit() - 1; 1520 assert(start_row <= last_row, "must be work left to do"); 1521 // Test this row for both the receiver and for null. 1522 // Take any of three different outcomes: 1523 // 1. found receiver => increment count and goto done 1524 // 2. found null => keep looking for case 1, maybe allocate this cell 1525 // 3. found something else => keep looking for cases 1 and 2 1526 // Case 3 is handled by a recursive call. 1527 for (int row = start_row; row <= last_row; row++) { 1528 Label next_test; 1529 bool test_for_null_also = (row == start_row); 1530 1531 // See if the receiver is receiver[n]. 1532 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); 1533 test_mdp_data_at(mdp, recvr_offset, receiver, 1534 (test_for_null_also ? reg2 : noreg), 1535 next_test); 1536 // (Reg2 now contains the receiver from the CallData.) 1537 1538 // The receiver is receiver[n]. Increment count[n]. 1539 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); 1540 increment_mdp_data_at(mdp, count_offset); 1541 jmp(done); 1542 bind(next_test); 1543 1544 if (test_for_null_also) { 1545 Label found_null; 1546 // Failed the equality check on receiver[n]... Test for null. 1547 testptr(reg2, reg2); 1548 if (start_row == last_row) { 1549 // The only thing left to do is handle the null case. 1550 if (is_virtual_call) { 1551 jccb(Assembler::zero, found_null); 1552 // Receiver did not match any saved receiver and there is no empty row for it. 1553 // Increment total counter to indicate polymorphic case. 1554 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1555 jmp(done); 1556 bind(found_null); 1557 } else { 1558 jcc(Assembler::notZero, done); 1559 } 1560 break; 1561 } 1562 // Since null is rare, make it be the branch-taken case. 1563 jcc(Assembler::zero, found_null); 1564 1565 // Put all the "Case 3" tests here. 1566 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); 1567 1568 // Found a null. Keep searching for a matching receiver, 1569 // but remember that this is an empty (unused) slot. 1570 bind(found_null); 1571 } 1572 } 1573 1574 // In the fall-through case, we found no matching receiver, but we 1575 // observed the receiver[start_row] is NULL. 1576 1577 // Fill in the receiver field and increment the count. 1578 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); 1579 set_mdp_data_at(mdp, recvr_offset, receiver); 1580 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); 1581 movl(reg2, DataLayout::counter_increment); 1582 set_mdp_data_at(mdp, count_offset, reg2); 1583 if (start_row > 0) { 1584 jmp(done); 1585 } 1586 } 1587 1588 // Example state machine code for three profile rows: 1589 // // main copy of decision tree, rooted at row[1] 1590 // if (row[0].rec == rec) { row[0].incr(); goto done; } 1591 // if (row[0].rec != NULL) { 1592 // // inner copy of decision tree, rooted at row[1] 1593 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1594 // if (row[1].rec != NULL) { 1595 // // degenerate decision tree, rooted at row[2] 1596 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1597 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow 1598 // row[2].init(rec); goto done; 1599 // } else { 1600 // // remember row[1] is empty 1601 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1602 // row[1].init(rec); goto done; 1603 // } 1604 // } else { 1605 // // remember row[0] is empty 1606 // if (row[1].rec == rec) { row[1].incr(); goto done; } 1607 // if (row[2].rec == rec) { row[2].incr(); goto done; } 1608 // row[0].init(rec); goto done; 1609 // } 1610 // done: 1611 1612 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1613 Register mdp, Register reg2, 1614 bool is_virtual_call) { 1615 assert(ProfileInterpreter, "must be profiling"); 1616 Label done; 1617 1618 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1619 1620 bind (done); 1621 } 1622 1623 void InterpreterMacroAssembler::profile_ret(Register return_bci, 1624 Register mdp) { 1625 if (ProfileInterpreter) { 1626 Label profile_continue; 1627 uint row; 1628 1629 // If no method data exists, go to profile_continue. 1630 test_method_data_pointer(mdp, profile_continue); 1631 1632 // Update the total ret count. 1633 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1634 1635 for (row = 0; row < RetData::row_limit(); row++) { 1636 Label next_test; 1637 1638 // See if return_bci is equal to bci[n]: 1639 test_mdp_data_at(mdp, 1640 in_bytes(RetData::bci_offset(row)), 1641 return_bci, noreg, 1642 next_test); 1643 1644 // return_bci is equal to bci[n]. Increment the count. 1645 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1646 1647 // The method data pointer needs to be updated to reflect the new target. 1648 update_mdp_by_offset(mdp, 1649 in_bytes(RetData::bci_displacement_offset(row))); 1650 jmp(profile_continue); 1651 bind(next_test); 1652 } 1653 1654 update_mdp_for_ret(return_bci); 1655 1656 bind(profile_continue); 1657 } 1658 } 1659 1660 1661 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1662 if (ProfileInterpreter) { 1663 Label profile_continue; 1664 1665 // If no method data exists, go to profile_continue. 1666 test_method_data_pointer(mdp, profile_continue); 1667 1668 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1669 1670 // The method data pointer needs to be updated. 1671 int mdp_delta = in_bytes(BitData::bit_data_size()); 1672 if (TypeProfileCasts) { 1673 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1674 } 1675 update_mdp_by_constant(mdp, mdp_delta); 1676 1677 bind(profile_continue); 1678 } 1679 } 1680 1681 1682 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1683 if (ProfileInterpreter && TypeProfileCasts) { 1684 Label profile_continue; 1685 1686 // If no method data exists, go to profile_continue. 1687 test_method_data_pointer(mdp, profile_continue); 1688 1689 int count_offset = in_bytes(CounterData::count_offset()); 1690 // Back up the address, since we have already bumped the mdp. 1691 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1692 1693 // *Decrement* the counter. We expect to see zero or small negatives. 1694 increment_mdp_data_at(mdp, count_offset, true); 1695 1696 bind (profile_continue); 1697 } 1698 } 1699 1700 1701 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { 1702 if (ProfileInterpreter) { 1703 Label profile_continue; 1704 1705 // If no method data exists, go to profile_continue. 1706 test_method_data_pointer(mdp, profile_continue); 1707 1708 // The method data pointer needs to be updated. 1709 int mdp_delta = in_bytes(BitData::bit_data_size()); 1710 if (TypeProfileCasts) { 1711 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1712 1713 // Record the object type. 1714 record_klass_in_profile(klass, mdp, reg2, false); 1715 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");) 1716 NOT_LP64(restore_locals();) // Restore EDI 1717 } 1718 update_mdp_by_constant(mdp, mdp_delta); 1719 1720 bind(profile_continue); 1721 } 1722 } 1723 1724 1725 void InterpreterMacroAssembler::profile_switch_default(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 // Update the default case count 1733 increment_mdp_data_at(mdp, 1734 in_bytes(MultiBranchData::default_count_offset())); 1735 1736 // The method data pointer needs to be updated. 1737 update_mdp_by_offset(mdp, 1738 in_bytes(MultiBranchData:: 1739 default_displacement_offset())); 1740 1741 bind(profile_continue); 1742 } 1743 } 1744 1745 1746 void InterpreterMacroAssembler::profile_switch_case(Register index, 1747 Register mdp, 1748 Register reg2) { 1749 if (ProfileInterpreter) { 1750 Label profile_continue; 1751 1752 // If no method data exists, go to profile_continue. 1753 test_method_data_pointer(mdp, profile_continue); 1754 1755 // Build the base (index * per_case_size_in_bytes()) + 1756 // case_array_offset_in_bytes() 1757 movl(reg2, in_bytes(MultiBranchData::per_case_size())); 1758 imulptr(index, reg2); // XXX l ? 1759 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? 1760 1761 // Update the case count 1762 increment_mdp_data_at(mdp, 1763 index, 1764 in_bytes(MultiBranchData::relative_count_offset())); 1765 1766 // The method data pointer needs to be updated. 1767 update_mdp_by_offset(mdp, 1768 index, 1769 in_bytes(MultiBranchData:: 1770 relative_displacement_offset())); 1771 1772 bind(profile_continue); 1773 } 1774 } 1775 1776 1777 1778 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 1779 if (state == atos) { 1780 MacroAssembler::verify_oop(reg); 1781 } 1782 } 1783 1784 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 1785 #ifndef _LP64 1786 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth); 1787 #endif 1788 } 1789 1790 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. 1791 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 1792 int increment, Address mask, 1793 Register scratch, bool preloaded, 1794 Condition cond, Label* where) { 1795 if (!preloaded) { 1796 movl(scratch, counter_addr); 1797 } 1798 incrementl(scratch, increment); 1799 movl(counter_addr, scratch); 1800 andl(scratch, mask); 1801 jcc(cond, *where); 1802 } 1803 #endif // CC_INTERP 1804 1805 void InterpreterMacroAssembler::notify_method_entry() { 1806 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1807 // track stack depth. If it is possible to enter interp_only_mode we add 1808 // the code to check if the event should be sent. 1809 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1810 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1811 if (JvmtiExport::can_post_interpreter_events()) { 1812 Label L; 1813 NOT_LP64(get_thread(rthread);) 1814 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1815 testl(rdx, rdx); 1816 jcc(Assembler::zero, L); 1817 call_VM(noreg, CAST_FROM_FN_PTR(address, 1818 InterpreterRuntime::post_method_entry)); 1819 bind(L); 1820 } 1821 1822 { 1823 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1824 NOT_LP64(get_thread(rthread);) 1825 get_method(rarg); 1826 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), 1827 rthread, rarg); 1828 } 1829 1830 // RedefineClasses() tracing support for obsolete method entry 1831 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { 1832 NOT_LP64(get_thread(rthread);) 1833 get_method(rarg); 1834 call_VM_leaf( 1835 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 1836 rthread, rarg); 1837 } 1838 } 1839 1840 1841 void InterpreterMacroAssembler::notify_method_exit( 1842 TosState state, NotifyMethodExitMode mode) { 1843 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1844 // track stack depth. If it is possible to enter interp_only_mode we add 1845 // the code to check if the event should be sent. 1846 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1847 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1848 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 1849 Label L; 1850 // Note: frame::interpreter_frame_result has a dependency on how the 1851 // method result is saved across the call to post_method_exit. If this 1852 // is changed then the interpreter_frame_result implementation will 1853 // need to be updated too. 1854 1855 // For c++ interpreter the result is always stored at a known location in the frame 1856 // template interpreter will leave it on the top of the stack. 1857 NOT_CC_INTERP(push(state);) 1858 NOT_LP64(get_thread(rthread);) 1859 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1860 testl(rdx, rdx); 1861 jcc(Assembler::zero, L); 1862 call_VM(noreg, 1863 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 1864 bind(L); 1865 NOT_CC_INTERP(pop(state)); 1866 } 1867 1868 { 1869 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1870 NOT_CC_INTERP(push(state)); 1871 NOT_LP64(get_thread(rthread);) 1872 get_method(rarg); 1873 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 1874 rthread, rarg); 1875 NOT_CC_INTERP(pop(state)); 1876 } 1877 }