interp_masm_x86.cpp revision 8001:854a2726b586
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 44void 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 88void 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 164void 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 197void 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 245void 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 252void 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 283void 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 316void 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 341void 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 392void 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 426void 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 433void 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 453void 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 466void 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 485void 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) 503void 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 531void 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 551void InterpreterMacroAssembler::f2ieee() { 552 if (IEEEPrecision) { 553 fstp_s(Address(rsp, 0)); 554 fld_s(Address(rsp, 0)); 555 } 556} 557 558 559void 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 569void InterpreterMacroAssembler::pop_ptr(Register r) { 570 pop(r); 571} 572 573void InterpreterMacroAssembler::push_ptr(Register r) { 574 push(r); 575} 576 577void InterpreterMacroAssembler::push_i(Register r) { 578 push(r); 579} 580 581#ifdef _LP64 582void 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 588void InterpreterMacroAssembler::pop_l(Register r) { 589 movq(r, Address(rsp, 0)); 590 addptr(rsp, 2 * Interpreter::stackElementSize); 591} 592 593void InterpreterMacroAssembler::pop_f(XMMRegister r) { 594 movflt(r, Address(rsp, 0)); 595 addptr(rsp, wordSize); 596} 597 598void InterpreterMacroAssembler::pop_d(XMMRegister r) { 599 movdbl(r, Address(rsp, 0)); 600 addptr(rsp, 2 * Interpreter::stackElementSize); 601} 602 603void InterpreterMacroAssembler::push_l(Register r) { 604 subptr(rsp, 2 * wordSize); 605 movq(Address(rsp, 0), r); 606} 607 608void InterpreterMacroAssembler::push_f(XMMRegister r) { 609 subptr(rsp, wordSize); 610 movflt(Address(rsp, 0), r); 611} 612 613void InterpreterMacroAssembler::push_d(XMMRegister r) { 614 subptr(rsp, 2 * wordSize); 615 movdbl(Address(rsp, 0), r); 616} 617 618void 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 634void 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 650void InterpreterMacroAssembler::pop_i(Register r) { 651 pop(r); 652} 653 654void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 655 pop(lo); 656 pop(hi); 657} 658 659void InterpreterMacroAssembler::pop_f() { 660 fld_s(Address(rsp, 0)); 661 addptr(rsp, 1 * wordSize); 662} 663 664void InterpreterMacroAssembler::pop_d() { 665 fld_d(Address(rsp, 0)); 666 addptr(rsp, 2 * wordSize); 667} 668 669 670void 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 687void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 688 push(hi); 689 push(lo); 690} 691 692void 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 698void 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 705void 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 724void InterpreterMacroAssembler::load_ptr(int n, Register val) { 725 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 726} 727 728void InterpreterMacroAssembler::store_ptr(int n, Register val) { 729 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 730} 731 732 733void 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 743void 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. 766void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 767 // Nothing x86 specific to be done here 768} 769 770void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 771 dispatch_next(state, step); 772} 773 774void 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 804void InterpreterMacroAssembler::dispatch_only(TosState state) { 805 dispatch_base(state, Interpreter::dispatch_table(state)); 806} 807 808void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 809 dispatch_base(state, Interpreter::normal_table(state)); 810} 811 812void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 813 dispatch_base(state, Interpreter::normal_table(state), false); 814} 815 816 817void 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 825void 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 844void 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 1017void 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 1039// rscratch1 (scratch regs) 1040void InterpreterMacroAssembler::lock_object(Register lock_reg) { 1041 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1042 "The argument is only for looks. It must be c_rarg1"); 1043 1044 if (UseHeavyMonitors) { 1045 call_VM(noreg, 1046 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1047 lock_reg); 1048 } else { 1049 Label done; 1050 1051 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1052 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1053 1054 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 1055 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 1056 const int mark_offset = lock_offset + 1057 BasicLock::displaced_header_offset_in_bytes(); 1058 1059 Label slow_case; 1060 1061 // Load object pointer into obj_reg 1062 movptr(obj_reg, Address(lock_reg, obj_offset)); 1063 1064 if (UseBiasedLocking) { 1065 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); 1066 } 1067 1068 // Load immediate 1 into swap_reg %rax 1069 movl(swap_reg, (int32_t)1); 1070 1071 // Load (object->mark() | 1) into swap_reg %rax 1072 orptr(swap_reg, Address(obj_reg, 0)); 1073 1074 // Save (object->mark() | 1) into BasicLock's displaced header 1075 movptr(Address(lock_reg, mark_offset), swap_reg); 1076 1077 assert(lock_offset == 0, 1078 "displached header must be first word in BasicObjectLock"); 1079 1080 if (os::is_MP()) lock(); 1081 cmpxchgptr(lock_reg, Address(obj_reg, 0)); 1082 if (PrintBiasedLockingStatistics) { 1083 cond_inc32(Assembler::zero, 1084 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1085 } 1086 jcc(Assembler::zero, done); 1087 1088 const int zero_bits = LP64_ONLY(7) NOT_LP64(3); 1089 1090 // Test if the oopMark is an obvious stack pointer, i.e., 1091 // 1) (mark & zero_bits) == 0, and 1092 // 2) rsp <= mark < mark + os::pagesize() 1093 // 1094 // These 3 tests can be done by evaluating the following 1095 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())), 1096 // assuming both stack pointer and pagesize have their 1097 // least significant bits clear. 1098 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg 1099 subptr(swap_reg, rsp); 1100 andptr(swap_reg, zero_bits - os::vm_page_size()); 1101 1102 // Save the test result, for recursive case, the result is zero 1103 movptr(Address(lock_reg, mark_offset), swap_reg); 1104 1105 if (PrintBiasedLockingStatistics) { 1106 cond_inc32(Assembler::zero, 1107 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1108 } 1109 jcc(Assembler::zero, done); 1110 1111 bind(slow_case); 1112 1113 // Call the runtime routine for slow case 1114 call_VM(noreg, 1115 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1116 lock_reg); 1117 1118 bind(done); 1119 } 1120} 1121 1122 1123// Unlocks an object. Used in monitorexit bytecode and 1124// remove_activation. Throws an IllegalMonitorException if object is 1125// not locked by current thread. 1126// 1127// Args: 1128// rdx, c_rarg1: BasicObjectLock for lock 1129// 1130// Kills: 1131// rax 1132// c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) 1133// rscratch1, rscratch2 (scratch regs) 1134// rax, rbx, rcx, rdx 1135void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 1136 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1137 "The argument is only for looks. It must be c_rarg1"); 1138 1139 if (UseHeavyMonitors) { 1140 call_VM(noreg, 1141 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1142 lock_reg); 1143 } else { 1144 Label done; 1145 1146 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1147 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark 1148 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1149 1150 save_bcp(); // Save in case of exception 1151 1152 // Convert from BasicObjectLock structure to object and BasicLock 1153 // structure Store the BasicLock address into %rax 1154 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 1155 1156 // Load oop into obj_reg(%c_rarg3) 1157 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); 1158 1159 // Free entry 1160 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); 1161 1162 if (UseBiasedLocking) { 1163 biased_locking_exit(obj_reg, header_reg, done); 1164 } 1165 1166 // Load the old header from BasicLock structure 1167 movptr(header_reg, Address(swap_reg, 1168 BasicLock::displaced_header_offset_in_bytes())); 1169 1170 // Test for recursion 1171 testptr(header_reg, header_reg); 1172 1173 // zero for recursive case 1174 jcc(Assembler::zero, done); 1175 1176 // Atomic swap back the old header 1177 if (os::is_MP()) lock(); 1178 cmpxchgptr(header_reg, Address(obj_reg, 0)); 1179 1180 // zero for recursive case 1181 jcc(Assembler::zero, done); 1182 1183 // Call the runtime routine for slow case. 1184 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), 1185 obj_reg); // restore obj 1186 call_VM(noreg, 1187 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1188 lock_reg); 1189 1190 bind(done); 1191 1192 restore_bcp(); 1193 } 1194} 1195#ifndef CC_INTERP 1196void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, 1197 Label& zero_continue) { 1198 assert(ProfileInterpreter, "must be profiling interpreter"); 1199 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize)); 1200 testptr(mdp, mdp); 1201 jcc(Assembler::zero, zero_continue); 1202} 1203 1204 1205// Set the method data pointer for the current bcp. 1206void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1207 assert(ProfileInterpreter, "must be profiling interpreter"); 1208 Label set_mdp; 1209 push(rax); 1210 push(rbx); 1211 1212 get_method(rbx); 1213 // Test MDO to avoid the call if it is NULL. 1214 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 1215 testptr(rax, rax); 1216 jcc(Assembler::zero, set_mdp); 1217 // rbx: method 1218 // _bcp_register: bcp 1219 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register); 1220 // rax: mdi 1221 // mdo is guaranteed to be non-zero here, we checked for it before the call. 1222 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 1223 addptr(rbx, in_bytes(MethodData::data_offset())); 1224 addptr(rax, rbx); 1225 bind(set_mdp); 1226 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax); 1227 pop(rbx); 1228 pop(rax); 1229} 1230 1231void InterpreterMacroAssembler::verify_method_data_pointer() { 1232 assert(ProfileInterpreter, "must be profiling interpreter"); 1233#ifdef ASSERT 1234 Label verify_continue; 1235 push(rax); 1236 push(rbx); 1237 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 1238 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 1239 push(arg3_reg); 1240 push(arg2_reg); 1241 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue 1242 get_method(rbx); 1243 1244 // If the mdp is valid, it will point to a DataLayout header which is 1245 // consistent with the bcp. The converse is highly probable also. 1246 load_unsigned_short(arg2_reg, 1247 Address(arg3_reg, in_bytes(DataLayout::bci_offset()))); 1248 addptr(arg2_reg, Address(rbx, Method::const_offset())); 1249 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset())); 1250 cmpptr(arg2_reg, _bcp_register); 1251 jcc(Assembler::equal, verify_continue); 1252 // rbx: method 1253 // _bcp_register: bcp 1254 // c_rarg3: mdp 1255 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), 1256 rbx, _bcp_register, arg3_reg); 1257 bind(verify_continue); 1258 pop(arg2_reg); 1259 pop(arg3_reg); 1260 pop(rbx); 1261 pop(rax); 1262#endif // ASSERT 1263} 1264 1265 1266void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, 1267 int constant, 1268 Register value) { 1269 assert(ProfileInterpreter, "must be profiling interpreter"); 1270 Address data(mdp_in, constant); 1271 movptr(data, value); 1272} 1273 1274 1275void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1276 int constant, 1277 bool decrement) { 1278 // Counter address 1279 Address data(mdp_in, constant); 1280 1281 increment_mdp_data_at(data, decrement); 1282} 1283 1284void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 1285 bool decrement) { 1286 assert(ProfileInterpreter, "must be profiling interpreter"); 1287 // %%% this does 64bit counters at best it is wasting space 1288 // at worst it is a rare bug when counters overflow 1289 1290 if (decrement) { 1291 // Decrement the register. Set condition codes. 1292 addptr(data, (int32_t) -DataLayout::counter_increment); 1293 // If the decrement causes the counter to overflow, stay negative 1294 Label L; 1295 jcc(Assembler::negative, L); 1296 addptr(data, (int32_t) DataLayout::counter_increment); 1297 bind(L); 1298 } else { 1299 assert(DataLayout::counter_increment == 1, 1300 "flow-free idiom only works with 1"); 1301 // Increment the register. Set carry flag. 1302 addptr(data, DataLayout::counter_increment); 1303 // If the increment causes the counter to overflow, pull back by 1. 1304 sbbptr(data, (int32_t)0); 1305 } 1306} 1307 1308 1309void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1310 Register reg, 1311 int constant, 1312 bool decrement) { 1313 Address data(mdp_in, reg, Address::times_1, constant); 1314 1315 increment_mdp_data_at(data, decrement); 1316} 1317 1318void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, 1319 int flag_byte_constant) { 1320 assert(ProfileInterpreter, "must be profiling interpreter"); 1321 int header_offset = in_bytes(DataLayout::header_offset()); 1322 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); 1323 // Set the flag 1324 orl(Address(mdp_in, header_offset), header_bits); 1325} 1326 1327 1328 1329void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 1330 int offset, 1331 Register value, 1332 Register test_value_out, 1333 Label& not_equal_continue) { 1334 assert(ProfileInterpreter, "must be profiling interpreter"); 1335 if (test_value_out == noreg) { 1336 cmpptr(value, Address(mdp_in, offset)); 1337 } else { 1338 // Put the test value into a register, so caller can use it: 1339 movptr(test_value_out, Address(mdp_in, offset)); 1340 cmpptr(test_value_out, value); 1341 } 1342 jcc(Assembler::notEqual, not_equal_continue); 1343} 1344 1345 1346void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1347 int offset_of_disp) { 1348 assert(ProfileInterpreter, "must be profiling interpreter"); 1349 Address disp_address(mdp_in, offset_of_disp); 1350 addptr(mdp_in, disp_address); 1351 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1352} 1353 1354 1355void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1356 Register reg, 1357 int offset_of_disp) { 1358 assert(ProfileInterpreter, "must be profiling interpreter"); 1359 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 1360 addptr(mdp_in, disp_address); 1361 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1362} 1363 1364 1365void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, 1366 int constant) { 1367 assert(ProfileInterpreter, "must be profiling interpreter"); 1368 addptr(mdp_in, constant); 1369 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1370} 1371 1372 1373void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 1374 assert(ProfileInterpreter, "must be profiling interpreter"); 1375 push(return_bci); // save/restore across call_VM 1376 call_VM(noreg, 1377 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), 1378 return_bci); 1379 pop(return_bci); 1380} 1381 1382 1383void InterpreterMacroAssembler::profile_taken_branch(Register mdp, 1384 Register bumped_count) { 1385 if (ProfileInterpreter) { 1386 Label profile_continue; 1387 1388 // If no method data exists, go to profile_continue. 1389 // Otherwise, assign to mdp 1390 test_method_data_pointer(mdp, profile_continue); 1391 1392 // We are taking a branch. Increment the taken count. 1393 // We inline increment_mdp_data_at to return bumped_count in a register 1394 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1395 Address data(mdp, in_bytes(JumpData::taken_offset())); 1396 movptr(bumped_count, data); 1397 assert(DataLayout::counter_increment == 1, 1398 "flow-free idiom only works with 1"); 1399 addptr(bumped_count, DataLayout::counter_increment); 1400 sbbptr(bumped_count, 0); 1401 movptr(data, bumped_count); // Store back out 1402 1403 // The method data pointer needs to be updated to reflect the new target. 1404 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1405 bind(profile_continue); 1406 } 1407} 1408 1409 1410void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1411 if (ProfileInterpreter) { 1412 Label profile_continue; 1413 1414 // If no method data exists, go to profile_continue. 1415 test_method_data_pointer(mdp, profile_continue); 1416 1417 // We are taking a branch. Increment the not taken count. 1418 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1419 1420 // The method data pointer needs to be updated to correspond to 1421 // the next bytecode 1422 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1423 bind(profile_continue); 1424 } 1425} 1426 1427void InterpreterMacroAssembler::profile_call(Register mdp) { 1428 if (ProfileInterpreter) { 1429 Label profile_continue; 1430 1431 // If no method data exists, go to profile_continue. 1432 test_method_data_pointer(mdp, profile_continue); 1433 1434 // We are making a call. Increment the count. 1435 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1436 1437 // The method data pointer needs to be updated to reflect the new target. 1438 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1439 bind(profile_continue); 1440 } 1441} 1442 1443 1444void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1445 if (ProfileInterpreter) { 1446 Label profile_continue; 1447 1448 // If no method data exists, go to profile_continue. 1449 test_method_data_pointer(mdp, profile_continue); 1450 1451 // We are making a call. Increment the count. 1452 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1453 1454 // The method data pointer needs to be updated to reflect the new target. 1455 update_mdp_by_constant(mdp, 1456 in_bytes(VirtualCallData:: 1457 virtual_call_data_size())); 1458 bind(profile_continue); 1459 } 1460} 1461 1462 1463void InterpreterMacroAssembler::profile_virtual_call(Register receiver, 1464 Register mdp, 1465 Register reg2, 1466 bool receiver_can_be_null) { 1467 if (ProfileInterpreter) { 1468 Label profile_continue; 1469 1470 // If no method data exists, go to profile_continue. 1471 test_method_data_pointer(mdp, profile_continue); 1472 1473 Label skip_receiver_profile; 1474 if (receiver_can_be_null) { 1475 Label not_null; 1476 testptr(receiver, receiver); 1477 jccb(Assembler::notZero, not_null); 1478 // We are making a call. Increment the count for null receiver. 1479 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1480 jmp(skip_receiver_profile); 1481 bind(not_null); 1482 } 1483 1484 // Record the receiver type. 1485 record_klass_in_profile(receiver, mdp, reg2, true); 1486 bind(skip_receiver_profile); 1487 1488 // The method data pointer needs to be updated to reflect the new target. 1489 update_mdp_by_constant(mdp, 1490 in_bytes(VirtualCallData:: 1491 virtual_call_data_size())); 1492 bind(profile_continue); 1493 } 1494} 1495 1496// This routine creates a state machine for updating the multi-row 1497// type profile at a virtual call site (or other type-sensitive bytecode). 1498// The machine visits each row (of receiver/count) until the receiver type 1499// is found, or until it runs out of rows. At the same time, it remembers 1500// the location of the first empty row. (An empty row records null for its 1501// receiver, and can be allocated for a newly-observed receiver type.) 1502// Because there are two degrees of freedom in the state, a simple linear 1503// search will not work; it must be a decision tree. Hence this helper 1504// function is recursive, to generate the required tree structured code. 1505// It's the interpreter, so we are trading off code space for speed. 1506// See below for example code. 1507void InterpreterMacroAssembler::record_klass_in_profile_helper( 1508 Register receiver, Register mdp, 1509 Register reg2, int start_row, 1510 Label& done, bool is_virtual_call) { 1511 if (TypeProfileWidth == 0) { 1512 if (is_virtual_call) { 1513 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1514 } 1515 return; 1516 } 1517 1518 int last_row = VirtualCallData::row_limit() - 1; 1519 assert(start_row <= last_row, "must be work left to do"); 1520 // Test this row for both the receiver and for null. 1521 // Take any of three different outcomes: 1522 // 1. found receiver => increment count and goto done 1523 // 2. found null => keep looking for case 1, maybe allocate this cell 1524 // 3. found something else => keep looking for cases 1 and 2 1525 // Case 3 is handled by a recursive call. 1526 for (int row = start_row; row <= last_row; row++) { 1527 Label next_test; 1528 bool test_for_null_also = (row == start_row); 1529 1530 // See if the receiver is receiver[n]. 1531 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); 1532 test_mdp_data_at(mdp, recvr_offset, receiver, 1533 (test_for_null_also ? reg2 : noreg), 1534 next_test); 1535 // (Reg2 now contains the receiver from the CallData.) 1536 1537 // The receiver is receiver[n]. Increment count[n]. 1538 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); 1539 increment_mdp_data_at(mdp, count_offset); 1540 jmp(done); 1541 bind(next_test); 1542 1543 if (test_for_null_also) { 1544 Label found_null; 1545 // Failed the equality check on receiver[n]... Test for null. 1546 testptr(reg2, reg2); 1547 if (start_row == last_row) { 1548 // The only thing left to do is handle the null case. 1549 if (is_virtual_call) { 1550 jccb(Assembler::zero, found_null); 1551 // Receiver did not match any saved receiver and there is no empty row for it. 1552 // Increment total counter to indicate polymorphic case. 1553 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1554 jmp(done); 1555 bind(found_null); 1556 } else { 1557 jcc(Assembler::notZero, done); 1558 } 1559 break; 1560 } 1561 // Since null is rare, make it be the branch-taken case. 1562 jcc(Assembler::zero, found_null); 1563 1564 // Put all the "Case 3" tests here. 1565 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); 1566 1567 // Found a null. Keep searching for a matching receiver, 1568 // but remember that this is an empty (unused) slot. 1569 bind(found_null); 1570 } 1571 } 1572 1573 // In the fall-through case, we found no matching receiver, but we 1574 // observed the receiver[start_row] is NULL. 1575 1576 // Fill in the receiver field and increment the count. 1577 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); 1578 set_mdp_data_at(mdp, recvr_offset, receiver); 1579 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); 1580 movl(reg2, DataLayout::counter_increment); 1581 set_mdp_data_at(mdp, count_offset, reg2); 1582 if (start_row > 0) { 1583 jmp(done); 1584 } 1585} 1586 1587// Example state machine code for three profile rows: 1588// // main copy of decision tree, rooted at row[1] 1589// if (row[0].rec == rec) { row[0].incr(); goto done; } 1590// if (row[0].rec != NULL) { 1591// // inner copy of decision tree, rooted at row[1] 1592// if (row[1].rec == rec) { row[1].incr(); goto done; } 1593// if (row[1].rec != NULL) { 1594// // degenerate decision tree, rooted at row[2] 1595// if (row[2].rec == rec) { row[2].incr(); goto done; } 1596// if (row[2].rec != NULL) { count.incr(); goto done; } // overflow 1597// row[2].init(rec); goto done; 1598// } else { 1599// // remember row[1] is empty 1600// if (row[2].rec == rec) { row[2].incr(); goto done; } 1601// row[1].init(rec); goto done; 1602// } 1603// } else { 1604// // remember row[0] is empty 1605// if (row[1].rec == rec) { row[1].incr(); goto done; } 1606// if (row[2].rec == rec) { row[2].incr(); goto done; } 1607// row[0].init(rec); goto done; 1608// } 1609// done: 1610 1611void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1612 Register mdp, Register reg2, 1613 bool is_virtual_call) { 1614 assert(ProfileInterpreter, "must be profiling"); 1615 Label done; 1616 1617 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1618 1619 bind (done); 1620} 1621 1622void InterpreterMacroAssembler::profile_ret(Register return_bci, 1623 Register mdp) { 1624 if (ProfileInterpreter) { 1625 Label profile_continue; 1626 uint row; 1627 1628 // If no method data exists, go to profile_continue. 1629 test_method_data_pointer(mdp, profile_continue); 1630 1631 // Update the total ret count. 1632 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1633 1634 for (row = 0; row < RetData::row_limit(); row++) { 1635 Label next_test; 1636 1637 // See if return_bci is equal to bci[n]: 1638 test_mdp_data_at(mdp, 1639 in_bytes(RetData::bci_offset(row)), 1640 return_bci, noreg, 1641 next_test); 1642 1643 // return_bci is equal to bci[n]. Increment the count. 1644 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1645 1646 // The method data pointer needs to be updated to reflect the new target. 1647 update_mdp_by_offset(mdp, 1648 in_bytes(RetData::bci_displacement_offset(row))); 1649 jmp(profile_continue); 1650 bind(next_test); 1651 } 1652 1653 update_mdp_for_ret(return_bci); 1654 1655 bind(profile_continue); 1656 } 1657} 1658 1659 1660void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1661 if (ProfileInterpreter) { 1662 Label profile_continue; 1663 1664 // If no method data exists, go to profile_continue. 1665 test_method_data_pointer(mdp, profile_continue); 1666 1667 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1668 1669 // The method data pointer needs to be updated. 1670 int mdp_delta = in_bytes(BitData::bit_data_size()); 1671 if (TypeProfileCasts) { 1672 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1673 } 1674 update_mdp_by_constant(mdp, mdp_delta); 1675 1676 bind(profile_continue); 1677 } 1678} 1679 1680 1681void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1682 if (ProfileInterpreter && TypeProfileCasts) { 1683 Label profile_continue; 1684 1685 // If no method data exists, go to profile_continue. 1686 test_method_data_pointer(mdp, profile_continue); 1687 1688 int count_offset = in_bytes(CounterData::count_offset()); 1689 // Back up the address, since we have already bumped the mdp. 1690 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1691 1692 // *Decrement* the counter. We expect to see zero or small negatives. 1693 increment_mdp_data_at(mdp, count_offset, true); 1694 1695 bind (profile_continue); 1696 } 1697} 1698 1699 1700void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { 1701 if (ProfileInterpreter) { 1702 Label profile_continue; 1703 1704 // If no method data exists, go to profile_continue. 1705 test_method_data_pointer(mdp, profile_continue); 1706 1707 // The method data pointer needs to be updated. 1708 int mdp_delta = in_bytes(BitData::bit_data_size()); 1709 if (TypeProfileCasts) { 1710 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1711 1712 // Record the object type. 1713 record_klass_in_profile(klass, mdp, reg2, false); 1714 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");) 1715 NOT_LP64(restore_locals();) // Restore EDI 1716 } 1717 update_mdp_by_constant(mdp, mdp_delta); 1718 1719 bind(profile_continue); 1720 } 1721} 1722 1723 1724void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1725 if (ProfileInterpreter) { 1726 Label profile_continue; 1727 1728 // If no method data exists, go to profile_continue. 1729 test_method_data_pointer(mdp, profile_continue); 1730 1731 // Update the default case count 1732 increment_mdp_data_at(mdp, 1733 in_bytes(MultiBranchData::default_count_offset())); 1734 1735 // The method data pointer needs to be updated. 1736 update_mdp_by_offset(mdp, 1737 in_bytes(MultiBranchData:: 1738 default_displacement_offset())); 1739 1740 bind(profile_continue); 1741 } 1742} 1743 1744 1745void InterpreterMacroAssembler::profile_switch_case(Register index, 1746 Register mdp, 1747 Register reg2) { 1748 if (ProfileInterpreter) { 1749 Label profile_continue; 1750 1751 // If no method data exists, go to profile_continue. 1752 test_method_data_pointer(mdp, profile_continue); 1753 1754 // Build the base (index * per_case_size_in_bytes()) + 1755 // case_array_offset_in_bytes() 1756 movl(reg2, in_bytes(MultiBranchData::per_case_size())); 1757 imulptr(index, reg2); // XXX l ? 1758 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? 1759 1760 // Update the case count 1761 increment_mdp_data_at(mdp, 1762 index, 1763 in_bytes(MultiBranchData::relative_count_offset())); 1764 1765 // The method data pointer needs to be updated. 1766 update_mdp_by_offset(mdp, 1767 index, 1768 in_bytes(MultiBranchData:: 1769 relative_displacement_offset())); 1770 1771 bind(profile_continue); 1772 } 1773} 1774 1775 1776 1777void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 1778 if (state == atos) { 1779 MacroAssembler::verify_oop(reg); 1780 } 1781} 1782 1783void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 1784#ifndef _LP64 1785 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth); 1786#endif 1787} 1788 1789// Jump if ((*counter_addr += increment) & mask) satisfies the condition. 1790void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 1791 int increment, Address mask, 1792 Register scratch, bool preloaded, 1793 Condition cond, Label* where) { 1794 if (!preloaded) { 1795 movl(scratch, counter_addr); 1796 } 1797 incrementl(scratch, increment); 1798 movl(counter_addr, scratch); 1799 andl(scratch, mask); 1800 jcc(cond, *where); 1801} 1802#endif // CC_INTERP 1803 1804void InterpreterMacroAssembler::notify_method_entry() { 1805 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1806 // track stack depth. If it is possible to enter interp_only_mode we add 1807 // the code to check if the event should be sent. 1808 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1809 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1810 if (JvmtiExport::can_post_interpreter_events()) { 1811 Label L; 1812 NOT_LP64(get_thread(rthread);) 1813 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1814 testl(rdx, rdx); 1815 jcc(Assembler::zero, L); 1816 call_VM(noreg, CAST_FROM_FN_PTR(address, 1817 InterpreterRuntime::post_method_entry)); 1818 bind(L); 1819 } 1820 1821 { 1822 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1823 NOT_LP64(get_thread(rthread);) 1824 get_method(rarg); 1825 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), 1826 rthread, rarg); 1827 } 1828 1829 // RedefineClasses() tracing support for obsolete method entry 1830 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { 1831 NOT_LP64(get_thread(rthread);) 1832 get_method(rarg); 1833 call_VM_leaf( 1834 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 1835 rthread, rarg); 1836 } 1837} 1838 1839 1840void InterpreterMacroAssembler::notify_method_exit( 1841 TosState state, NotifyMethodExitMode mode) { 1842 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1843 // track stack depth. If it is possible to enter interp_only_mode we add 1844 // the code to check if the event should be sent. 1845 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1846 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1847 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 1848 Label L; 1849 // Note: frame::interpreter_frame_result has a dependency on how the 1850 // method result is saved across the call to post_method_exit. If this 1851 // is changed then the interpreter_frame_result implementation will 1852 // need to be updated too. 1853 1854 // For c++ interpreter the result is always stored at a known location in the frame 1855 // template interpreter will leave it on the top of the stack. 1856 NOT_CC_INTERP(push(state);) 1857 NOT_LP64(get_thread(rthread);) 1858 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1859 testl(rdx, rdx); 1860 jcc(Assembler::zero, L); 1861 call_VM(noreg, 1862 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 1863 bind(L); 1864 NOT_CC_INTERP(pop(state)); 1865 } 1866 1867 { 1868 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1869 NOT_CC_INTERP(push(state)); 1870 NOT_LP64(get_thread(rthread);) 1871 get_method(rarg); 1872 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 1873 rthread, rarg); 1874 NOT_CC_INTERP(pop(state)); 1875 } 1876} 1877