interp_masm_x86.cpp revision 8488:968044dba2a5
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_resolved_references(Register reg) { 486 get_constant_pool(reg); 487 movptr(reg, Address(reg, ConstantPool::pool_holder_offset_in_bytes())); 488 movptr(reg, Address(reg, Klass::java_mirror_offset())); 489 assert(java_lang_Class::resolved_references_offset_in_bytes() > 0, ""); 490 load_heap_oop(reg, Address(reg, java_lang_Class::resolved_references_offset_in_bytes())); 491} 492 493void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, 494 Register tmp, 495 int bcp_offset, 496 size_t index_size) { 497 assert(cache != tmp, "must use different register"); 498 get_cache_index_at_bcp(tmp, bcp_offset, index_size); 499 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); 500 // convert from field index to ConstantPoolCacheEntry index 501 // and from word offset to byte offset 502 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); 503 shll(tmp, 2 + LogBytesPerWord); 504 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 505 // skip past the header 506 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 507 addptr(cache, tmp); // construct pointer to cache entry 508} 509 510// Load object from cpool->pool_holder->mirror->resolved_references(index) 511void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result, Register index) { 512 assert_different_registers(result, index); 513 // convert from field index to resolved_references() index and from 514 // word index to byte offset. Since this is a java object, it can be compressed 515 Register tmp = index; // reuse 516 shll(tmp, LogBytesPerHeapOop); 517 518 // load pointer for resolved_references[] objArray 519 get_resolved_references(result); 520 // Add in the index 521 addptr(result, tmp); 522 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 523} 524 525 526// Generate a subtype check: branch to ok_is_subtype if sub_klass is a 527// subtype of super_klass. 528// 529// Args: 530// rax: superklass 531// Rsub_klass: subklass 532// 533// Kills: 534// rcx, rdi 535void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, 536 Label& ok_is_subtype) { 537 assert(Rsub_klass != rax, "rax holds superklass"); 538 LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");) 539 LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");) 540 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); 541 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); 542 543 // Profile the not-null value's klass. 544 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 545 546 // Do the check. 547 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 548 549 // Profile the failure of the check. 550 profile_typecheck_failed(rcx); // blows rcx 551} 552 553 554#ifndef _LP64 555void InterpreterMacroAssembler::f2ieee() { 556 if (IEEEPrecision) { 557 fstp_s(Address(rsp, 0)); 558 fld_s(Address(rsp, 0)); 559 } 560} 561 562 563void InterpreterMacroAssembler::d2ieee() { 564 if (IEEEPrecision) { 565 fstp_d(Address(rsp, 0)); 566 fld_d(Address(rsp, 0)); 567 } 568} 569#endif // _LP64 570 571// Java Expression Stack 572 573void InterpreterMacroAssembler::pop_ptr(Register r) { 574 pop(r); 575} 576 577void InterpreterMacroAssembler::push_ptr(Register r) { 578 push(r); 579} 580 581void InterpreterMacroAssembler::push_i(Register r) { 582 push(r); 583} 584 585#ifdef _LP64 586void InterpreterMacroAssembler::pop_i(Register r) { 587 // XXX can't use pop currently, upper half non clean 588 movl(r, Address(rsp, 0)); 589 addptr(rsp, wordSize); 590} 591 592void InterpreterMacroAssembler::pop_l(Register r) { 593 movq(r, Address(rsp, 0)); 594 addptr(rsp, 2 * Interpreter::stackElementSize); 595} 596 597void InterpreterMacroAssembler::pop_f(XMMRegister r) { 598 movflt(r, Address(rsp, 0)); 599 addptr(rsp, wordSize); 600} 601 602void InterpreterMacroAssembler::pop_d(XMMRegister r) { 603 movdbl(r, Address(rsp, 0)); 604 addptr(rsp, 2 * Interpreter::stackElementSize); 605} 606 607void InterpreterMacroAssembler::push_l(Register r) { 608 subptr(rsp, 2 * wordSize); 609 movq(Address(rsp, 0), r); 610} 611 612void InterpreterMacroAssembler::push_f(XMMRegister r) { 613 subptr(rsp, wordSize); 614 movflt(Address(rsp, 0), r); 615} 616 617void InterpreterMacroAssembler::push_d(XMMRegister r) { 618 subptr(rsp, 2 * wordSize); 619 movdbl(Address(rsp, 0), r); 620} 621 622void InterpreterMacroAssembler::pop(TosState state) { 623 switch (state) { 624 case atos: pop_ptr(); break; 625 case btos: 626 case ctos: 627 case stos: 628 case itos: pop_i(); break; 629 case ltos: pop_l(); break; 630 case ftos: pop_f(); break; 631 case dtos: pop_d(); break; 632 case vtos: /* nothing to do */ break; 633 default: ShouldNotReachHere(); 634 } 635 verify_oop(rax, state); 636} 637 638void InterpreterMacroAssembler::push(TosState state) { 639 verify_oop(rax, state); 640 switch (state) { 641 case atos: push_ptr(); break; 642 case btos: 643 case ctos: 644 case stos: 645 case itos: push_i(); break; 646 case ltos: push_l(); break; 647 case ftos: push_f(); break; 648 case dtos: push_d(); break; 649 case vtos: /* nothing to do */ break; 650 default : ShouldNotReachHere(); 651 } 652} 653#else 654void InterpreterMacroAssembler::pop_i(Register r) { 655 pop(r); 656} 657 658void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 659 pop(lo); 660 pop(hi); 661} 662 663void InterpreterMacroAssembler::pop_f() { 664 fld_s(Address(rsp, 0)); 665 addptr(rsp, 1 * wordSize); 666} 667 668void InterpreterMacroAssembler::pop_d() { 669 fld_d(Address(rsp, 0)); 670 addptr(rsp, 2 * wordSize); 671} 672 673 674void InterpreterMacroAssembler::pop(TosState state) { 675 switch (state) { 676 case atos: pop_ptr(rax); break; 677 case btos: // fall through 678 case ctos: // fall through 679 case stos: // fall through 680 case itos: pop_i(rax); break; 681 case ltos: pop_l(rax, rdx); break; 682 case ftos: pop_f(); break; 683 case dtos: pop_d(); break; 684 case vtos: /* nothing to do */ break; 685 default : ShouldNotReachHere(); 686 } 687 verify_oop(rax, state); 688} 689 690 691void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 692 push(hi); 693 push(lo); 694} 695 696void InterpreterMacroAssembler::push_f() { 697 // Do not schedule for no AGI! Never write beyond rsp! 698 subptr(rsp, 1 * wordSize); 699 fstp_s(Address(rsp, 0)); 700} 701 702void InterpreterMacroAssembler::push_d(Register r) { 703 // Do not schedule for no AGI! Never write beyond rsp! 704 subptr(rsp, 2 * wordSize); 705 fstp_d(Address(rsp, 0)); 706} 707 708 709void InterpreterMacroAssembler::push(TosState state) { 710 verify_oop(rax, state); 711 switch (state) { 712 case atos: push_ptr(rax); break; 713 case btos: // fall through 714 case ctos: // fall through 715 case stos: // fall through 716 case itos: push_i(rax); break; 717 case ltos: push_l(rax, rdx); break; 718 case ftos: push_f(); break; 719 case dtos: push_d(rax); break; 720 case vtos: /* nothing to do */ break; 721 default : ShouldNotReachHere(); 722 } 723} 724#endif // _LP64 725 726 727// Helpers for swap and dup 728void InterpreterMacroAssembler::load_ptr(int n, Register val) { 729 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 730} 731 732void InterpreterMacroAssembler::store_ptr(int n, Register val) { 733 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 734} 735 736 737void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 738 // set sender sp 739 lea(_bcp_register, Address(rsp, wordSize)); 740 // record last_sp 741 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register); 742} 743 744 745// Jump to from_interpreted entry of a call unless single stepping is possible 746// in this thread in which case we must call the i2i entry 747void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 748 prepare_to_jump_from_interpreted(); 749 750 if (JvmtiExport::can_post_interpreter_events()) { 751 Label run_compiled_code; 752 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 753 // compiled code in threads for which the event is enabled. Check here for 754 // interp_only_mode if these events CAN be enabled. 755 // interp_only is an int, on little endian it is sufficient to test the byte only 756 // Is a cmpl faster? 757 LP64_ONLY(temp = r15_thread;) 758 NOT_LP64(get_thread(temp);) 759 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 760 jccb(Assembler::zero, run_compiled_code); 761 jmp(Address(method, Method::interpreter_entry_offset())); 762 bind(run_compiled_code); 763 } 764 765 jmp(Address(method, Method::from_interpreted_offset())); 766} 767 768// The following two routines provide a hook so that an implementation 769// can schedule the dispatch in two parts. x86 does not do this. 770void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 771 // Nothing x86 specific to be done here 772} 773 774void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 775 dispatch_next(state, step); 776} 777 778void InterpreterMacroAssembler::dispatch_base(TosState state, 779 address* table, 780 bool verifyoop) { 781 verify_FPU(1, state); 782 if (VerifyActivationFrameSize) { 783 Label L; 784 mov(rcx, rbp); 785 subptr(rcx, rsp); 786 int32_t min_frame_size = 787 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * 788 wordSize; 789 cmpptr(rcx, (int32_t)min_frame_size); 790 jcc(Assembler::greaterEqual, L); 791 stop("broken stack frame"); 792 bind(L); 793 } 794 if (verifyoop) { 795 verify_oop(rax, state); 796 } 797#ifdef _LP64 798 lea(rscratch1, ExternalAddress((address)table)); 799 jmp(Address(rscratch1, rbx, Address::times_8)); 800#else 801 Address index(noreg, rbx, Address::times_ptr); 802 ExternalAddress tbl((address)table); 803 ArrayAddress dispatch(tbl, index); 804 jump(dispatch); 805#endif // _LP64 806} 807 808void InterpreterMacroAssembler::dispatch_only(TosState state) { 809 dispatch_base(state, Interpreter::dispatch_table(state)); 810} 811 812void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 813 dispatch_base(state, Interpreter::normal_table(state)); 814} 815 816void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 817 dispatch_base(state, Interpreter::normal_table(state), false); 818} 819 820 821void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { 822 // load next bytecode (load before advancing _bcp_register to prevent AGI) 823 load_unsigned_byte(rbx, Address(_bcp_register, step)); 824 // advance _bcp_register 825 increment(_bcp_register, step); 826 dispatch_base(state, Interpreter::dispatch_table(state)); 827} 828 829void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 830 // load current bytecode 831 load_unsigned_byte(rbx, Address(_bcp_register, 0)); 832 dispatch_base(state, table); 833} 834 835// remove activation 836// 837// Unlock the receiver if this is a synchronized method. 838// Unlock any Java monitors from syncronized blocks. 839// Remove the activation from the stack. 840// 841// If there are locked Java monitors 842// If throw_monitor_exception 843// throws IllegalMonitorStateException 844// Else if install_monitor_exception 845// installs IllegalMonitorStateException 846// Else 847// no error processing 848void InterpreterMacroAssembler::remove_activation( 849 TosState state, 850 Register ret_addr, 851 bool throw_monitor_exception, 852 bool install_monitor_exception, 853 bool notify_jvmdi) { 854 // Note: Registers rdx xmm0 may be in use for the 855 // result check if synchronized method 856 Label unlocked, unlock, no_unlock; 857 858 const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 859 const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx); 860 const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx); 861 // monitor pointers need different register 862 // because rdx may have the result in it 863 NOT_LP64(get_thread(rcx);) 864 865 // get the value of _do_not_unlock_if_synchronized into rdx 866 const Address do_not_unlock_if_synchronized(rthread, 867 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 868 movbool(rbx, do_not_unlock_if_synchronized); 869 movbool(do_not_unlock_if_synchronized, false); // reset the flag 870 871 // get method access flags 872 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); 873 movl(rcx, Address(rcx, Method::access_flags_offset())); 874 testl(rcx, JVM_ACC_SYNCHRONIZED); 875 jcc(Assembler::zero, unlocked); 876 877 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 878 // is set. 879 testbool(rbx); 880 jcc(Assembler::notZero, no_unlock); 881 882 // unlock monitor 883 push(state); // save result 884 885 // BasicObjectLock will be first in list, since this is a 886 // synchronized method. However, need to check that the object has 887 // not been unlocked by an explicit monitorexit bytecode. 888 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * 889 wordSize - (int) sizeof(BasicObjectLock)); 890 // We use c_rarg1/rdx so that if we go slow path it will be the correct 891 // register for unlock_object to pass to VM directly 892 lea(robj, monitor); // address of first monitor 893 894 movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes())); 895 testptr(rax, rax); 896 jcc(Assembler::notZero, unlock); 897 898 pop(state); 899 if (throw_monitor_exception) { 900 // Entry already unlocked, need to throw exception 901 NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow 902 call_VM(noreg, CAST_FROM_FN_PTR(address, 903 InterpreterRuntime::throw_illegal_monitor_state_exception)); 904 should_not_reach_here(); 905 } else { 906 // Monitor already unlocked during a stack unroll. If requested, 907 // install an illegal_monitor_state_exception. Continue with 908 // stack unrolling. 909 if (install_monitor_exception) { 910 NOT_LP64(empty_FPU_stack();) 911 call_VM(noreg, CAST_FROM_FN_PTR(address, 912 InterpreterRuntime::new_illegal_monitor_state_exception)); 913 } 914 jmp(unlocked); 915 } 916 917 bind(unlock); 918 unlock_object(robj); 919 pop(state); 920 921 // Check that for block-structured locking (i.e., that all locked 922 // objects has been unlocked) 923 bind(unlocked); 924 925 // rax, rdx: Might contain return value 926 927 // Check that all monitors are unlocked 928 { 929 Label loop, exception, entry, restart; 930 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 931 const Address monitor_block_top( 932 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 933 const Address monitor_block_bot( 934 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 935 936 bind(restart); 937 // We use c_rarg1 so that if we go slow path it will be the correct 938 // register for unlock_object to pass to VM directly 939 movptr(rmon, monitor_block_top); // points to current entry, starting 940 // with top-most entry 941 lea(rbx, monitor_block_bot); // points to word before bottom of 942 // monitor block 943 jmp(entry); 944 945 // Entry already locked, need to throw exception 946 bind(exception); 947 948 if (throw_monitor_exception) { 949 // Throw exception 950 NOT_LP64(empty_FPU_stack();) 951 MacroAssembler::call_VM(noreg, 952 CAST_FROM_FN_PTR(address, InterpreterRuntime:: 953 throw_illegal_monitor_state_exception)); 954 should_not_reach_here(); 955 } else { 956 // Stack unrolling. Unlock object and install illegal_monitor_exception. 957 // Unlock does not block, so don't have to worry about the frame. 958 // We don't have to preserve c_rarg1 since we are going to throw an exception. 959 960 push(state); 961 mov(robj, rmon); // nop if robj and rmon are the same 962 unlock_object(robj); 963 pop(state); 964 965 if (install_monitor_exception) { 966 NOT_LP64(empty_FPU_stack();) 967 call_VM(noreg, CAST_FROM_FN_PTR(address, 968 InterpreterRuntime:: 969 new_illegal_monitor_state_exception)); 970 } 971 972 jmp(restart); 973 } 974 975 bind(loop); 976 // check if current entry is used 977 cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); 978 jcc(Assembler::notEqual, exception); 979 980 addptr(rmon, entry_size); // otherwise advance to next entry 981 bind(entry); 982 cmpptr(rmon, rbx); // check if bottom reached 983 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 984 } 985 986 bind(no_unlock); 987 988 // jvmti support 989 if (notify_jvmdi) { 990 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 991 } else { 992 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 993 } 994 995 // remove activation 996 // get sender sp 997 movptr(rbx, 998 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); 999 leave(); // remove frame anchor 1000 pop(ret_addr); // get return address 1001 mov(rsp, rbx); // set sp to sender sp 1002#ifndef _LP64 1003 if (UseSSE) { 1004 // float and double are returned in xmm register in SSE-mode 1005 if (state == ftos && UseSSE >= 1) { 1006 subptr(rsp, wordSize); 1007 fstp_s(Address(rsp, 0)); 1008 movflt(xmm0, Address(rsp, 0)); 1009 addptr(rsp, wordSize); 1010 } else if (state == dtos && UseSSE >= 2) { 1011 subptr(rsp, 2*wordSize); 1012 fstp_d(Address(rsp, 0)); 1013 movdbl(xmm0, Address(rsp, 0)); 1014 addptr(rsp, 2*wordSize); 1015 } 1016 } 1017#endif // _LP64 1018} 1019#endif // !CC_INTERP 1020 1021void InterpreterMacroAssembler::get_method_counters(Register method, 1022 Register mcs, Label& skip) { 1023 Label has_counters; 1024 movptr(mcs, Address(method, Method::method_counters_offset())); 1025 testptr(mcs, mcs); 1026 jcc(Assembler::notZero, has_counters); 1027 call_VM(noreg, CAST_FROM_FN_PTR(address, 1028 InterpreterRuntime::build_method_counters), method); 1029 movptr(mcs, Address(method,Method::method_counters_offset())); 1030 testptr(mcs, mcs); 1031 jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory 1032 bind(has_counters); 1033} 1034 1035 1036// Lock object 1037// 1038// Args: 1039// rdx, c_rarg1: BasicObjectLock to be used for locking 1040// 1041// Kills: 1042// rax, rbx 1043void InterpreterMacroAssembler::lock_object(Register lock_reg) { 1044 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1045 "The argument is only for looks. It must be c_rarg1"); 1046 1047 if (UseHeavyMonitors) { 1048 call_VM(noreg, 1049 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1050 lock_reg); 1051 } else { 1052 Label done; 1053 1054 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1055 const Register tmp_reg = rbx; // Will be passed to biased_locking_enter to avoid a 1056 // problematic case where tmp_reg = no_reg. 1057 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1058 1059 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 1060 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 1061 const int mark_offset = lock_offset + 1062 BasicLock::displaced_header_offset_in_bytes(); 1063 1064 Label slow_case; 1065 1066 // Load object pointer into obj_reg 1067 movptr(obj_reg, Address(lock_reg, obj_offset)); 1068 1069 if (UseBiasedLocking) { 1070 biased_locking_enter(lock_reg, obj_reg, swap_reg, tmp_reg, false, done, &slow_case); 1071 } 1072 1073 // Load immediate 1 into swap_reg %rax 1074 movl(swap_reg, (int32_t)1); 1075 1076 // Load (object->mark() | 1) into swap_reg %rax 1077 orptr(swap_reg, Address(obj_reg, 0)); 1078 1079 // Save (object->mark() | 1) into BasicLock's displaced header 1080 movptr(Address(lock_reg, mark_offset), swap_reg); 1081 1082 assert(lock_offset == 0, 1083 "displached header must be first word in BasicObjectLock"); 1084 1085 if (os::is_MP()) lock(); 1086 cmpxchgptr(lock_reg, Address(obj_reg, 0)); 1087 if (PrintBiasedLockingStatistics) { 1088 cond_inc32(Assembler::zero, 1089 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1090 } 1091 jcc(Assembler::zero, done); 1092 1093 const int zero_bits = LP64_ONLY(7) NOT_LP64(3); 1094 1095 // Test if the oopMark is an obvious stack pointer, i.e., 1096 // 1) (mark & zero_bits) == 0, and 1097 // 2) rsp <= mark < mark + os::pagesize() 1098 // 1099 // These 3 tests can be done by evaluating the following 1100 // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())), 1101 // assuming both stack pointer and pagesize have their 1102 // least significant bits clear. 1103 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg 1104 subptr(swap_reg, rsp); 1105 andptr(swap_reg, zero_bits - os::vm_page_size()); 1106 1107 // Save the test result, for recursive case, the result is zero 1108 movptr(Address(lock_reg, mark_offset), swap_reg); 1109 1110 if (PrintBiasedLockingStatistics) { 1111 cond_inc32(Assembler::zero, 1112 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 1113 } 1114 jcc(Assembler::zero, done); 1115 1116 bind(slow_case); 1117 1118 // Call the runtime routine for slow case 1119 call_VM(noreg, 1120 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 1121 lock_reg); 1122 1123 bind(done); 1124 } 1125} 1126 1127 1128// Unlocks an object. Used in monitorexit bytecode and 1129// remove_activation. Throws an IllegalMonitorException if object is 1130// not locked by current thread. 1131// 1132// Args: 1133// rdx, c_rarg1: BasicObjectLock for lock 1134// 1135// Kills: 1136// rax 1137// c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) 1138// rscratch1, rscratch2 (scratch regs) 1139// rax, rbx, rcx, rdx 1140void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 1141 assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx), 1142 "The argument is only for looks. It must be c_rarg1"); 1143 1144 if (UseHeavyMonitors) { 1145 call_VM(noreg, 1146 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1147 lock_reg); 1148 } else { 1149 Label done; 1150 1151 const Register swap_reg = rax; // Must use rax for cmpxchg instruction 1152 const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark 1153 const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop 1154 1155 save_bcp(); // Save in case of exception 1156 1157 // Convert from BasicObjectLock structure to object and BasicLock 1158 // structure Store the BasicLock address into %rax 1159 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 1160 1161 // Load oop into obj_reg(%c_rarg3) 1162 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); 1163 1164 // Free entry 1165 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); 1166 1167 if (UseBiasedLocking) { 1168 biased_locking_exit(obj_reg, header_reg, done); 1169 } 1170 1171 // Load the old header from BasicLock structure 1172 movptr(header_reg, Address(swap_reg, 1173 BasicLock::displaced_header_offset_in_bytes())); 1174 1175 // Test for recursion 1176 testptr(header_reg, header_reg); 1177 1178 // zero for recursive case 1179 jcc(Assembler::zero, done); 1180 1181 // Atomic swap back the old header 1182 if (os::is_MP()) lock(); 1183 cmpxchgptr(header_reg, Address(obj_reg, 0)); 1184 1185 // zero for recursive case 1186 jcc(Assembler::zero, done); 1187 1188 // Call the runtime routine for slow case. 1189 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), 1190 obj_reg); // restore obj 1191 call_VM(noreg, 1192 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1193 lock_reg); 1194 1195 bind(done); 1196 1197 restore_bcp(); 1198 } 1199} 1200#ifndef CC_INTERP 1201void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, 1202 Label& zero_continue) { 1203 assert(ProfileInterpreter, "must be profiling interpreter"); 1204 movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize)); 1205 testptr(mdp, mdp); 1206 jcc(Assembler::zero, zero_continue); 1207} 1208 1209 1210// Set the method data pointer for the current bcp. 1211void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1212 assert(ProfileInterpreter, "must be profiling interpreter"); 1213 Label set_mdp; 1214 push(rax); 1215 push(rbx); 1216 1217 get_method(rbx); 1218 // Test MDO to avoid the call if it is NULL. 1219 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 1220 testptr(rax, rax); 1221 jcc(Assembler::zero, set_mdp); 1222 // rbx: method 1223 // _bcp_register: bcp 1224 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register); 1225 // rax: mdi 1226 // mdo is guaranteed to be non-zero here, we checked for it before the call. 1227 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 1228 addptr(rbx, in_bytes(MethodData::data_offset())); 1229 addptr(rax, rbx); 1230 bind(set_mdp); 1231 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax); 1232 pop(rbx); 1233 pop(rax); 1234} 1235 1236void InterpreterMacroAssembler::verify_method_data_pointer() { 1237 assert(ProfileInterpreter, "must be profiling interpreter"); 1238#ifdef ASSERT 1239 Label verify_continue; 1240 push(rax); 1241 push(rbx); 1242 Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); 1243 Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx); 1244 push(arg3_reg); 1245 push(arg2_reg); 1246 test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue 1247 get_method(rbx); 1248 1249 // If the mdp is valid, it will point to a DataLayout header which is 1250 // consistent with the bcp. The converse is highly probable also. 1251 load_unsigned_short(arg2_reg, 1252 Address(arg3_reg, in_bytes(DataLayout::bci_offset()))); 1253 addptr(arg2_reg, Address(rbx, Method::const_offset())); 1254 lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset())); 1255 cmpptr(arg2_reg, _bcp_register); 1256 jcc(Assembler::equal, verify_continue); 1257 // rbx: method 1258 // _bcp_register: bcp 1259 // c_rarg3: mdp 1260 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), 1261 rbx, _bcp_register, arg3_reg); 1262 bind(verify_continue); 1263 pop(arg2_reg); 1264 pop(arg3_reg); 1265 pop(rbx); 1266 pop(rax); 1267#endif // ASSERT 1268} 1269 1270 1271void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, 1272 int constant, 1273 Register value) { 1274 assert(ProfileInterpreter, "must be profiling interpreter"); 1275 Address data(mdp_in, constant); 1276 movptr(data, value); 1277} 1278 1279 1280void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1281 int constant, 1282 bool decrement) { 1283 // Counter address 1284 Address data(mdp_in, constant); 1285 1286 increment_mdp_data_at(data, decrement); 1287} 1288 1289void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 1290 bool decrement) { 1291 assert(ProfileInterpreter, "must be profiling interpreter"); 1292 // %%% this does 64bit counters at best it is wasting space 1293 // at worst it is a rare bug when counters overflow 1294 1295 if (decrement) { 1296 // Decrement the register. Set condition codes. 1297 addptr(data, (int32_t) -DataLayout::counter_increment); 1298 // If the decrement causes the counter to overflow, stay negative 1299 Label L; 1300 jcc(Assembler::negative, L); 1301 addptr(data, (int32_t) DataLayout::counter_increment); 1302 bind(L); 1303 } else { 1304 assert(DataLayout::counter_increment == 1, 1305 "flow-free idiom only works with 1"); 1306 // Increment the register. Set carry flag. 1307 addptr(data, DataLayout::counter_increment); 1308 // If the increment causes the counter to overflow, pull back by 1. 1309 sbbptr(data, (int32_t)0); 1310 } 1311} 1312 1313 1314void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 1315 Register reg, 1316 int constant, 1317 bool decrement) { 1318 Address data(mdp_in, reg, Address::times_1, constant); 1319 1320 increment_mdp_data_at(data, decrement); 1321} 1322 1323void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, 1324 int flag_byte_constant) { 1325 assert(ProfileInterpreter, "must be profiling interpreter"); 1326 int header_offset = in_bytes(DataLayout::header_offset()); 1327 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); 1328 // Set the flag 1329 orl(Address(mdp_in, header_offset), header_bits); 1330} 1331 1332 1333 1334void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 1335 int offset, 1336 Register value, 1337 Register test_value_out, 1338 Label& not_equal_continue) { 1339 assert(ProfileInterpreter, "must be profiling interpreter"); 1340 if (test_value_out == noreg) { 1341 cmpptr(value, Address(mdp_in, offset)); 1342 } else { 1343 // Put the test value into a register, so caller can use it: 1344 movptr(test_value_out, Address(mdp_in, offset)); 1345 cmpptr(test_value_out, value); 1346 } 1347 jcc(Assembler::notEqual, not_equal_continue); 1348} 1349 1350 1351void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1352 int offset_of_disp) { 1353 assert(ProfileInterpreter, "must be profiling interpreter"); 1354 Address disp_address(mdp_in, offset_of_disp); 1355 addptr(mdp_in, disp_address); 1356 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1357} 1358 1359 1360void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, 1361 Register reg, 1362 int offset_of_disp) { 1363 assert(ProfileInterpreter, "must be profiling interpreter"); 1364 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 1365 addptr(mdp_in, disp_address); 1366 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1367} 1368 1369 1370void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, 1371 int constant) { 1372 assert(ProfileInterpreter, "must be profiling interpreter"); 1373 addptr(mdp_in, constant); 1374 movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in); 1375} 1376 1377 1378void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 1379 assert(ProfileInterpreter, "must be profiling interpreter"); 1380 push(return_bci); // save/restore across call_VM 1381 call_VM(noreg, 1382 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), 1383 return_bci); 1384 pop(return_bci); 1385} 1386 1387 1388void InterpreterMacroAssembler::profile_taken_branch(Register mdp, 1389 Register bumped_count) { 1390 if (ProfileInterpreter) { 1391 Label profile_continue; 1392 1393 // If no method data exists, go to profile_continue. 1394 // Otherwise, assign to mdp 1395 test_method_data_pointer(mdp, profile_continue); 1396 1397 // We are taking a branch. Increment the taken count. 1398 // We inline increment_mdp_data_at to return bumped_count in a register 1399 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1400 Address data(mdp, in_bytes(JumpData::taken_offset())); 1401 movptr(bumped_count, data); 1402 assert(DataLayout::counter_increment == 1, 1403 "flow-free idiom only works with 1"); 1404 addptr(bumped_count, DataLayout::counter_increment); 1405 sbbptr(bumped_count, 0); 1406 movptr(data, bumped_count); // Store back out 1407 1408 // The method data pointer needs to be updated to reflect the new target. 1409 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1410 bind(profile_continue); 1411 } 1412} 1413 1414 1415void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1416 if (ProfileInterpreter) { 1417 Label profile_continue; 1418 1419 // If no method data exists, go to profile_continue. 1420 test_method_data_pointer(mdp, profile_continue); 1421 1422 // We are taking a branch. Increment the not taken count. 1423 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1424 1425 // The method data pointer needs to be updated to correspond to 1426 // the next bytecode 1427 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1428 bind(profile_continue); 1429 } 1430} 1431 1432void InterpreterMacroAssembler::profile_call(Register mdp) { 1433 if (ProfileInterpreter) { 1434 Label profile_continue; 1435 1436 // If no method data exists, go to profile_continue. 1437 test_method_data_pointer(mdp, profile_continue); 1438 1439 // We are making a call. Increment the count. 1440 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1441 1442 // The method data pointer needs to be updated to reflect the new target. 1443 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1444 bind(profile_continue); 1445 } 1446} 1447 1448 1449void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1450 if (ProfileInterpreter) { 1451 Label profile_continue; 1452 1453 // If no method data exists, go to profile_continue. 1454 test_method_data_pointer(mdp, profile_continue); 1455 1456 // We are making a call. Increment the count. 1457 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1458 1459 // The method data pointer needs to be updated to reflect the new target. 1460 update_mdp_by_constant(mdp, 1461 in_bytes(VirtualCallData:: 1462 virtual_call_data_size())); 1463 bind(profile_continue); 1464 } 1465} 1466 1467 1468void InterpreterMacroAssembler::profile_virtual_call(Register receiver, 1469 Register mdp, 1470 Register reg2, 1471 bool receiver_can_be_null) { 1472 if (ProfileInterpreter) { 1473 Label profile_continue; 1474 1475 // If no method data exists, go to profile_continue. 1476 test_method_data_pointer(mdp, profile_continue); 1477 1478 Label skip_receiver_profile; 1479 if (receiver_can_be_null) { 1480 Label not_null; 1481 testptr(receiver, receiver); 1482 jccb(Assembler::notZero, not_null); 1483 // We are making a call. Increment the count for null receiver. 1484 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1485 jmp(skip_receiver_profile); 1486 bind(not_null); 1487 } 1488 1489 // Record the receiver type. 1490 record_klass_in_profile(receiver, mdp, reg2, true); 1491 bind(skip_receiver_profile); 1492 1493 // The method data pointer needs to be updated to reflect the new target. 1494 update_mdp_by_constant(mdp, 1495 in_bytes(VirtualCallData:: 1496 virtual_call_data_size())); 1497 bind(profile_continue); 1498 } 1499} 1500 1501// This routine creates a state machine for updating the multi-row 1502// type profile at a virtual call site (or other type-sensitive bytecode). 1503// The machine visits each row (of receiver/count) until the receiver type 1504// is found, or until it runs out of rows. At the same time, it remembers 1505// the location of the first empty row. (An empty row records null for its 1506// receiver, and can be allocated for a newly-observed receiver type.) 1507// Because there are two degrees of freedom in the state, a simple linear 1508// search will not work; it must be a decision tree. Hence this helper 1509// function is recursive, to generate the required tree structured code. 1510// It's the interpreter, so we are trading off code space for speed. 1511// See below for example code. 1512void InterpreterMacroAssembler::record_klass_in_profile_helper( 1513 Register receiver, Register mdp, 1514 Register reg2, int start_row, 1515 Label& done, bool is_virtual_call) { 1516 if (TypeProfileWidth == 0) { 1517 if (is_virtual_call) { 1518 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1519 } 1520 return; 1521 } 1522 1523 int last_row = VirtualCallData::row_limit() - 1; 1524 assert(start_row <= last_row, "must be work left to do"); 1525 // Test this row for both the receiver and for null. 1526 // Take any of three different outcomes: 1527 // 1. found receiver => increment count and goto done 1528 // 2. found null => keep looking for case 1, maybe allocate this cell 1529 // 3. found something else => keep looking for cases 1 and 2 1530 // Case 3 is handled by a recursive call. 1531 for (int row = start_row; row <= last_row; row++) { 1532 Label next_test; 1533 bool test_for_null_also = (row == start_row); 1534 1535 // See if the receiver is receiver[n]. 1536 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); 1537 test_mdp_data_at(mdp, recvr_offset, receiver, 1538 (test_for_null_also ? reg2 : noreg), 1539 next_test); 1540 // (Reg2 now contains the receiver from the CallData.) 1541 1542 // The receiver is receiver[n]. Increment count[n]. 1543 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); 1544 increment_mdp_data_at(mdp, count_offset); 1545 jmp(done); 1546 bind(next_test); 1547 1548 if (test_for_null_also) { 1549 Label found_null; 1550 // Failed the equality check on receiver[n]... Test for null. 1551 testptr(reg2, reg2); 1552 if (start_row == last_row) { 1553 // The only thing left to do is handle the null case. 1554 if (is_virtual_call) { 1555 jccb(Assembler::zero, found_null); 1556 // Receiver did not match any saved receiver and there is no empty row for it. 1557 // Increment total counter to indicate polymorphic case. 1558 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1559 jmp(done); 1560 bind(found_null); 1561 } else { 1562 jcc(Assembler::notZero, done); 1563 } 1564 break; 1565 } 1566 // Since null is rare, make it be the branch-taken case. 1567 jcc(Assembler::zero, found_null); 1568 1569 // Put all the "Case 3" tests here. 1570 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); 1571 1572 // Found a null. Keep searching for a matching receiver, 1573 // but remember that this is an empty (unused) slot. 1574 bind(found_null); 1575 } 1576 } 1577 1578 // In the fall-through case, we found no matching receiver, but we 1579 // observed the receiver[start_row] is NULL. 1580 1581 // Fill in the receiver field and increment the count. 1582 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); 1583 set_mdp_data_at(mdp, recvr_offset, receiver); 1584 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); 1585 movl(reg2, DataLayout::counter_increment); 1586 set_mdp_data_at(mdp, count_offset, reg2); 1587 if (start_row > 0) { 1588 jmp(done); 1589 } 1590} 1591 1592// Example state machine code for three profile rows: 1593// // main copy of decision tree, rooted at row[1] 1594// if (row[0].rec == rec) { row[0].incr(); goto done; } 1595// if (row[0].rec != NULL) { 1596// // inner copy of decision tree, rooted at row[1] 1597// if (row[1].rec == rec) { row[1].incr(); goto done; } 1598// if (row[1].rec != NULL) { 1599// // degenerate decision tree, rooted at row[2] 1600// if (row[2].rec == rec) { row[2].incr(); goto done; } 1601// if (row[2].rec != NULL) { count.incr(); goto done; } // overflow 1602// row[2].init(rec); goto done; 1603// } else { 1604// // remember row[1] is empty 1605// if (row[2].rec == rec) { row[2].incr(); goto done; } 1606// row[1].init(rec); goto done; 1607// } 1608// } else { 1609// // remember row[0] is empty 1610// if (row[1].rec == rec) { row[1].incr(); goto done; } 1611// if (row[2].rec == rec) { row[2].incr(); goto done; } 1612// row[0].init(rec); goto done; 1613// } 1614// done: 1615 1616void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1617 Register mdp, Register reg2, 1618 bool is_virtual_call) { 1619 assert(ProfileInterpreter, "must be profiling"); 1620 Label done; 1621 1622 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1623 1624 bind (done); 1625} 1626 1627void InterpreterMacroAssembler::profile_ret(Register return_bci, 1628 Register mdp) { 1629 if (ProfileInterpreter) { 1630 Label profile_continue; 1631 uint row; 1632 1633 // If no method data exists, go to profile_continue. 1634 test_method_data_pointer(mdp, profile_continue); 1635 1636 // Update the total ret count. 1637 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1638 1639 for (row = 0; row < RetData::row_limit(); row++) { 1640 Label next_test; 1641 1642 // See if return_bci is equal to bci[n]: 1643 test_mdp_data_at(mdp, 1644 in_bytes(RetData::bci_offset(row)), 1645 return_bci, noreg, 1646 next_test); 1647 1648 // return_bci is equal to bci[n]. Increment the count. 1649 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1650 1651 // The method data pointer needs to be updated to reflect the new target. 1652 update_mdp_by_offset(mdp, 1653 in_bytes(RetData::bci_displacement_offset(row))); 1654 jmp(profile_continue); 1655 bind(next_test); 1656 } 1657 1658 update_mdp_for_ret(return_bci); 1659 1660 bind(profile_continue); 1661 } 1662} 1663 1664 1665void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1666 if (ProfileInterpreter) { 1667 Label profile_continue; 1668 1669 // If no method data exists, go to profile_continue. 1670 test_method_data_pointer(mdp, profile_continue); 1671 1672 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1673 1674 // The method data pointer needs to be updated. 1675 int mdp_delta = in_bytes(BitData::bit_data_size()); 1676 if (TypeProfileCasts) { 1677 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1678 } 1679 update_mdp_by_constant(mdp, mdp_delta); 1680 1681 bind(profile_continue); 1682 } 1683} 1684 1685 1686void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1687 if (ProfileInterpreter && TypeProfileCasts) { 1688 Label profile_continue; 1689 1690 // If no method data exists, go to profile_continue. 1691 test_method_data_pointer(mdp, profile_continue); 1692 1693 int count_offset = in_bytes(CounterData::count_offset()); 1694 // Back up the address, since we have already bumped the mdp. 1695 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1696 1697 // *Decrement* the counter. We expect to see zero or small negatives. 1698 increment_mdp_data_at(mdp, count_offset, true); 1699 1700 bind (profile_continue); 1701 } 1702} 1703 1704 1705void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { 1706 if (ProfileInterpreter) { 1707 Label profile_continue; 1708 1709 // If no method data exists, go to profile_continue. 1710 test_method_data_pointer(mdp, profile_continue); 1711 1712 // The method data pointer needs to be updated. 1713 int mdp_delta = in_bytes(BitData::bit_data_size()); 1714 if (TypeProfileCasts) { 1715 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1716 1717 // Record the object type. 1718 record_klass_in_profile(klass, mdp, reg2, false); 1719 NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");) 1720 NOT_LP64(restore_locals();) // Restore EDI 1721 } 1722 update_mdp_by_constant(mdp, mdp_delta); 1723 1724 bind(profile_continue); 1725 } 1726} 1727 1728 1729void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1730 if (ProfileInterpreter) { 1731 Label profile_continue; 1732 1733 // If no method data exists, go to profile_continue. 1734 test_method_data_pointer(mdp, profile_continue); 1735 1736 // Update the default case count 1737 increment_mdp_data_at(mdp, 1738 in_bytes(MultiBranchData::default_count_offset())); 1739 1740 // The method data pointer needs to be updated. 1741 update_mdp_by_offset(mdp, 1742 in_bytes(MultiBranchData:: 1743 default_displacement_offset())); 1744 1745 bind(profile_continue); 1746 } 1747} 1748 1749 1750void InterpreterMacroAssembler::profile_switch_case(Register index, 1751 Register mdp, 1752 Register reg2) { 1753 if (ProfileInterpreter) { 1754 Label profile_continue; 1755 1756 // If no method data exists, go to profile_continue. 1757 test_method_data_pointer(mdp, profile_continue); 1758 1759 // Build the base (index * per_case_size_in_bytes()) + 1760 // case_array_offset_in_bytes() 1761 movl(reg2, in_bytes(MultiBranchData::per_case_size())); 1762 imulptr(index, reg2); // XXX l ? 1763 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? 1764 1765 // Update the case count 1766 increment_mdp_data_at(mdp, 1767 index, 1768 in_bytes(MultiBranchData::relative_count_offset())); 1769 1770 // The method data pointer needs to be updated. 1771 update_mdp_by_offset(mdp, 1772 index, 1773 in_bytes(MultiBranchData:: 1774 relative_displacement_offset())); 1775 1776 bind(profile_continue); 1777 } 1778} 1779 1780 1781 1782void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 1783 if (state == atos) { 1784 MacroAssembler::verify_oop(reg); 1785 } 1786} 1787 1788void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 1789#ifndef _LP64 1790 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth); 1791#endif 1792} 1793 1794// Jump if ((*counter_addr += increment) & mask) satisfies the condition. 1795void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 1796 int increment, Address mask, 1797 Register scratch, bool preloaded, 1798 Condition cond, Label* where) { 1799 if (!preloaded) { 1800 movl(scratch, counter_addr); 1801 } 1802 incrementl(scratch, increment); 1803 movl(counter_addr, scratch); 1804 andl(scratch, mask); 1805 jcc(cond, *where); 1806} 1807#endif // CC_INTERP 1808 1809void InterpreterMacroAssembler::notify_method_entry() { 1810 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1811 // track stack depth. If it is possible to enter interp_only_mode we add 1812 // the code to check if the event should be sent. 1813 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1814 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1815 if (JvmtiExport::can_post_interpreter_events()) { 1816 Label L; 1817 NOT_LP64(get_thread(rthread);) 1818 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1819 testl(rdx, rdx); 1820 jcc(Assembler::zero, L); 1821 call_VM(noreg, CAST_FROM_FN_PTR(address, 1822 InterpreterRuntime::post_method_entry)); 1823 bind(L); 1824 } 1825 1826 { 1827 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1828 NOT_LP64(get_thread(rthread);) 1829 get_method(rarg); 1830 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), 1831 rthread, rarg); 1832 } 1833 1834 // RedefineClasses() tracing support for obsolete method entry 1835 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { 1836 NOT_LP64(get_thread(rthread);) 1837 get_method(rarg); 1838 call_VM_leaf( 1839 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 1840 rthread, rarg); 1841 } 1842} 1843 1844 1845void InterpreterMacroAssembler::notify_method_exit( 1846 TosState state, NotifyMethodExitMode mode) { 1847 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1848 // track stack depth. If it is possible to enter interp_only_mode we add 1849 // the code to check if the event should be sent. 1850 Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx); 1851 Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx); 1852 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 1853 Label L; 1854 // Note: frame::interpreter_frame_result has a dependency on how the 1855 // method result is saved across the call to post_method_exit. If this 1856 // is changed then the interpreter_frame_result implementation will 1857 // need to be updated too. 1858 1859 // For c++ interpreter the result is always stored at a known location in the frame 1860 // template interpreter will leave it on the top of the stack. 1861 NOT_CC_INTERP(push(state);) 1862 NOT_LP64(get_thread(rthread);) 1863 movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset())); 1864 testl(rdx, rdx); 1865 jcc(Assembler::zero, L); 1866 call_VM(noreg, 1867 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 1868 bind(L); 1869 NOT_CC_INTERP(pop(state)); 1870 } 1871 1872 { 1873 SkipIfEqual skip(this, &DTraceMethodProbes, false); 1874 NOT_CC_INTERP(push(state)); 1875 NOT_LP64(get_thread(rthread);) 1876 get_method(rarg); 1877 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 1878 rthread, rarg); 1879 NOT_CC_INTERP(pop(state)); 1880 } 1881} 1882