1 /* 2 * Copyright (c) 1997, 2011, 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_32.hpp" 27 #include "interpreter/interpreter.hpp" 28 #include "interpreter/interpreterRuntime.hpp" 29 #include "oops/arrayOop.hpp" 30 #include "oops/markOop.hpp" 31 #include "oops/methodDataOop.hpp" 32 #include "oops/methodOop.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 #ifdef TARGET_OS_FAMILY_linux 40 # include "thread_linux.inline.hpp" 41 #endif 42 #ifdef TARGET_OS_FAMILY_solaris 43 # include "thread_solaris.inline.hpp" 44 #endif 45 #ifdef TARGET_OS_FAMILY_windows 46 # include "thread_windows.inline.hpp" 47 #endif 48 49 50 // Implementation of InterpreterMacroAssembler 51 #ifdef CC_INTERP 52 void InterpreterMacroAssembler::get_method(Register reg) { 53 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize))); 54 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); 55 } 56 #endif // CC_INTERP 57 58 59 #ifndef CC_INTERP 60 void InterpreterMacroAssembler::call_VM_leaf_base( 61 address entry_point, 62 int number_of_arguments 63 ) { 64 // interpreter specific 65 // 66 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer 67 // since these are callee saved registers and no blocking/ 68 // GC can happen in leaf calls. 69 // Further Note: DO NOT save/restore bcp/locals. If a caller has 70 // already saved them so that it can use rsi/rdi as temporaries 71 // then a save/restore here will DESTROY the copy the caller 72 // saved! There used to be a save_bcp() that only happened in 73 // the ASSERT path (no restore_bcp). Which caused bizarre failures 74 // when jvm built with ASSERTs. 75 #ifdef ASSERT 76 { Label L; 77 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 78 jcc(Assembler::equal, L); 79 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL"); 80 bind(L); 81 } 82 #endif 83 // super call 84 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 85 // interpreter specific 86 87 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals 88 // but since they may not have been saved (and we don't want to 89 // save them here (see note above) the assert is invalid. 90 } 91 92 93 void InterpreterMacroAssembler::call_VM_base( 94 Register oop_result, 95 Register java_thread, 96 Register last_java_sp, 97 address entry_point, 98 int number_of_arguments, 99 bool check_exceptions 100 ) { 101 #ifdef ASSERT 102 { Label L; 103 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 104 jcc(Assembler::equal, L); 105 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL"); 106 bind(L); 107 } 108 #endif /* ASSERT */ 109 // interpreter specific 110 // 111 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't 112 // really make a difference for these runtime calls, since they are 113 // slow anyway. Btw., bcp must be saved/restored since it may change 114 // due to GC. 115 assert(java_thread == noreg , "not expecting a precomputed java thread"); 116 save_bcp(); 117 // super call 118 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); 119 // interpreter specific 120 restore_bcp(); 121 restore_locals(); 122 } 123 124 125 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { 126 if (JvmtiExport::can_pop_frame()) { 127 Label L; 128 // Initiate popframe handling only if it is not already being processed. If the flag 129 // has the popframe_processing bit set, it means that this code is called *during* popframe 130 // handling - we don't want to reenter. 131 Register pop_cond = java_thread; // Not clear if any other register is available... 132 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset())); 133 testl(pop_cond, JavaThread::popframe_pending_bit); 134 jcc(Assembler::zero, L); 135 testl(pop_cond, JavaThread::popframe_processing_bit); 136 jcc(Assembler::notZero, L); 137 // Call Interpreter::remove_activation_preserving_args_entry() to get the 138 // address of the same-named entrypoint in the generated interpreter code. 139 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); 140 jmp(rax); 141 bind(L); 142 get_thread(java_thread); 143 } 144 } 145 146 147 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { 148 get_thread(rcx); 149 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset())); 150 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset()); 151 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset()); 152 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset()); 153 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() 154 + in_ByteSize(wordSize)); 155 switch (state) { 156 case atos: movptr(rax, oop_addr); 157 movptr(oop_addr, NULL_WORD); 158 verify_oop(rax, state); break; 159 case ltos: 160 movl(rdx, val_addr1); // fall through 161 case btos: // fall through 162 case ctos: // fall through 163 case stos: // fall through 164 case itos: movl(rax, val_addr); break; 165 case ftos: fld_s(val_addr); break; 166 case dtos: fld_d(val_addr); break; 167 case vtos: /* nothing to do */ break; 168 default : ShouldNotReachHere(); 169 } 170 // Clean up tos value in the thread object 171 movl(tos_addr, (int32_t) ilgl); 172 movptr(val_addr, NULL_WORD); 173 NOT_LP64(movptr(val_addr1, NULL_WORD)); 174 } 175 176 177 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { 178 if (JvmtiExport::can_force_early_return()) { 179 Label L; 180 Register tmp = java_thread; 181 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset())); 182 testptr(tmp, tmp); 183 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; 184 185 // Initiate earlyret handling only if it is not already being processed. 186 // If the flag has the earlyret_processing bit set, it means that this code 187 // is called *during* earlyret handling - we don't want to reenter. 188 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset())); 189 cmpl(tmp, JvmtiThreadState::earlyret_pending); 190 jcc(Assembler::notEqual, L); 191 192 // Call Interpreter::remove_activation_early_entry() to get the address of the 193 // same-named entrypoint in the generated interpreter code. 194 get_thread(java_thread); 195 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset())); 196 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 197 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1); 198 jmp(rax); 199 bind(L); 200 get_thread(java_thread); 201 } 202 } 203 204 205 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) { 206 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); 207 movl(reg, Address(rsi, bcp_offset)); 208 bswapl(reg); 209 shrl(reg, 16); 210 } 211 212 213 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) { 214 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); 215 if (index_size == sizeof(u2)) { 216 load_unsigned_short(reg, Address(rsi, bcp_offset)); 217 } else if (index_size == sizeof(u4)) { 218 assert(EnableInvokeDynamic, "giant index used only for JSR 292"); 219 movl(reg, Address(rsi, bcp_offset)); 220 // Check if the secondary index definition is still ~x, otherwise 221 // we have to change the following assembler code to calculate the 222 // plain index. 223 assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line"); 224 notl(reg); // convert to plain index 225 } else if (index_size == sizeof(u1)) { 226 assert(EnableInvokeDynamic, "tiny index used only for JSR 292"); 227 load_unsigned_byte(reg, Address(rsi, bcp_offset)); 228 } else { 229 ShouldNotReachHere(); 230 } 231 } 232 233 234 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index, 235 int bcp_offset, size_t index_size) { 236 assert(cache != index, "must use different registers"); 237 get_cache_index_at_bcp(index, bcp_offset, index_size); 238 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 239 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below"); 240 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index 241 } 242 243 244 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp, 245 int bcp_offset, size_t index_size) { 246 assert(cache != tmp, "must use different register"); 247 get_cache_index_at_bcp(tmp, bcp_offset, index_size); 248 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below"); 249 // convert from field index to ConstantPoolCacheEntry index 250 // and from word offset to byte offset 251 shll(tmp, 2 + LogBytesPerWord); 252 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 253 // skip past the header 254 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset())); 255 addptr(cache, tmp); // construct pointer to cache entry 256 } 257 258 259 // Generate a subtype check: branch to ok_is_subtype if sub_klass is 260 // a subtype of super_klass. EAX holds the super_klass. Blows ECX. 261 // Resets EDI to locals. Register sub_klass cannot be any of the above. 262 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) { 263 assert( Rsub_klass != rax, "rax, holds superklass" ); 264 assert( Rsub_klass != rcx, "used as a temp" ); 265 assert( Rsub_klass != rdi, "used as a temp, restored from locals" ); 266 267 // Profile the not-null value's klass. 268 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 269 270 // Do the check. 271 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 272 273 // Profile the failure of the check. 274 profile_typecheck_failed(rcx); // blows rcx 275 } 276 277 void InterpreterMacroAssembler::f2ieee() { 278 if (IEEEPrecision) { 279 fstp_s(Address(rsp, 0)); 280 fld_s(Address(rsp, 0)); 281 } 282 } 283 284 285 void InterpreterMacroAssembler::d2ieee() { 286 if (IEEEPrecision) { 287 fstp_d(Address(rsp, 0)); 288 fld_d(Address(rsp, 0)); 289 } 290 } 291 292 // Java Expression Stack 293 294 void InterpreterMacroAssembler::pop_ptr(Register r) { 295 pop(r); 296 } 297 298 void InterpreterMacroAssembler::pop_i(Register r) { 299 pop(r); 300 } 301 302 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 303 pop(lo); 304 pop(hi); 305 } 306 307 void InterpreterMacroAssembler::pop_f() { 308 fld_s(Address(rsp, 0)); 309 addptr(rsp, 1 * wordSize); 310 } 311 312 void InterpreterMacroAssembler::pop_d() { 313 fld_d(Address(rsp, 0)); 314 addptr(rsp, 2 * wordSize); 315 } 316 317 318 void InterpreterMacroAssembler::pop(TosState state) { 319 switch (state) { 320 case atos: pop_ptr(rax); break; 321 case btos: // fall through 322 case ctos: // fall through 323 case stos: // fall through 324 case itos: pop_i(rax); break; 325 case ltos: pop_l(rax, rdx); break; 326 case ftos: pop_f(); break; 327 case dtos: pop_d(); break; 328 case vtos: /* nothing to do */ break; 329 default : ShouldNotReachHere(); 330 } 331 verify_oop(rax, state); 332 } 333 334 void InterpreterMacroAssembler::push_ptr(Register r) { 335 push(r); 336 } 337 338 void InterpreterMacroAssembler::push_i(Register r) { 339 push(r); 340 } 341 342 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 343 push(hi); 344 push(lo); 345 } 346 347 void InterpreterMacroAssembler::push_f() { 348 // Do not schedule for no AGI! Never write beyond rsp! 349 subptr(rsp, 1 * wordSize); 350 fstp_s(Address(rsp, 0)); 351 } 352 353 void InterpreterMacroAssembler::push_d(Register r) { 354 // Do not schedule for no AGI! Never write beyond rsp! 355 subptr(rsp, 2 * wordSize); 356 fstp_d(Address(rsp, 0)); 357 } 358 359 360 void InterpreterMacroAssembler::push(TosState state) { 361 verify_oop(rax, state); 362 switch (state) { 363 case atos: push_ptr(rax); break; 364 case btos: // fall through 365 case ctos: // fall through 366 case stos: // fall through 367 case itos: push_i(rax); break; 368 case ltos: push_l(rax, rdx); break; 369 case ftos: push_f(); break; 370 case dtos: push_d(rax); break; 371 case vtos: /* nothing to do */ break; 372 default : ShouldNotReachHere(); 373 } 374 } 375 376 377 // Helpers for swap and dup 378 void InterpreterMacroAssembler::load_ptr(int n, Register val) { 379 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 380 } 381 382 void InterpreterMacroAssembler::store_ptr(int n, Register val) { 383 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 384 } 385 386 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) { 387 MacroAssembler::call_VM_leaf_base(entry_point, 0); 388 } 389 390 391 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1) { 392 push(arg_1); 393 MacroAssembler::call_VM_leaf_base(entry_point, 1); 394 } 395 396 397 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2) { 398 push(arg_2); 399 push(arg_1); 400 MacroAssembler::call_VM_leaf_base(entry_point, 2); 401 } 402 403 404 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3) { 405 push(arg_3); 406 push(arg_2); 407 push(arg_1); 408 MacroAssembler::call_VM_leaf_base(entry_point, 3); 409 } 410 411 412 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 413 // set sender sp 414 lea(rsi, Address(rsp, wordSize)); 415 // record last_sp 416 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi); 417 } 418 419 420 // Jump to from_interpreted entry of a call unless single stepping is possible 421 // in this thread in which case we must call the i2i entry 422 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 423 prepare_to_jump_from_interpreted(); 424 425 if (JvmtiExport::can_post_interpreter_events()) { 426 Label run_compiled_code; 427 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 428 // compiled code in threads for which the event is enabled. Check here for 429 // interp_only_mode if these events CAN be enabled. 430 get_thread(temp); 431 // interp_only is an int, on little endian it is sufficient to test the byte only 432 // Is a cmpl faster (ce 433 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 434 jcc(Assembler::zero, run_compiled_code); 435 jmp(Address(method, methodOopDesc::interpreter_entry_offset())); 436 bind(run_compiled_code); 437 } 438 439 jmp(Address(method, methodOopDesc::from_interpreted_offset())); 440 441 } 442 443 444 // The following two routines provide a hook so that an implementation 445 // can schedule the dispatch in two parts. Intel does not do this. 446 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 447 // Nothing Intel-specific to be done here. 448 } 449 450 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 451 dispatch_next(state, step); 452 } 453 454 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table, 455 bool verifyoop) { 456 verify_FPU(1, state); 457 if (VerifyActivationFrameSize) { 458 Label L; 459 mov(rcx, rbp); 460 subptr(rcx, rsp); 461 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize; 462 cmpptr(rcx, min_frame_size); 463 jcc(Assembler::greaterEqual, L); 464 stop("broken stack frame"); 465 bind(L); 466 } 467 if (verifyoop) verify_oop(rax, state); 468 Address index(noreg, rbx, Address::times_ptr); 469 ExternalAddress tbl((address)table); 470 ArrayAddress dispatch(tbl, index); 471 jump(dispatch); 472 } 473 474 475 void InterpreterMacroAssembler::dispatch_only(TosState state) { 476 dispatch_base(state, Interpreter::dispatch_table(state)); 477 } 478 479 480 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 481 dispatch_base(state, Interpreter::normal_table(state)); 482 } 483 484 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 485 dispatch_base(state, Interpreter::normal_table(state), false); 486 } 487 488 489 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { 490 // load next bytecode (load before advancing rsi to prevent AGI) 491 load_unsigned_byte(rbx, Address(rsi, step)); 492 // advance rsi 493 increment(rsi, step); 494 dispatch_base(state, Interpreter::dispatch_table(state)); 495 } 496 497 498 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 499 // load current bytecode 500 load_unsigned_byte(rbx, Address(rsi, 0)); 501 dispatch_base(state, table); 502 } 503 504 // remove activation 505 // 506 // Unlock the receiver if this is a synchronized method. 507 // Unlock any Java monitors from syncronized blocks. 508 // Remove the activation from the stack. 509 // 510 // If there are locked Java monitors 511 // If throw_monitor_exception 512 // throws IllegalMonitorStateException 513 // Else if install_monitor_exception 514 // installs IllegalMonitorStateException 515 // Else 516 // no error processing 517 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr, 518 bool throw_monitor_exception, 519 bool install_monitor_exception, 520 bool notify_jvmdi) { 521 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result 522 // check if synchronized method 523 Label unlocked, unlock, no_unlock; 524 525 get_thread(rcx); 526 const Address do_not_unlock_if_synchronized(rcx, 527 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 528 529 movbool(rbx, do_not_unlock_if_synchronized); 530 mov(rdi,rbx); 531 movbool(do_not_unlock_if_synchronized, false); // reset the flag 532 533 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags 534 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset())); 535 536 testl(rcx, JVM_ACC_SYNCHRONIZED); 537 jcc(Assembler::zero, unlocked); 538 539 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 540 // is set. 541 mov(rcx,rdi); 542 testbool(rcx); 543 jcc(Assembler::notZero, no_unlock); 544 545 // unlock monitor 546 push(state); // save result 547 548 // BasicObjectLock will be first in list, since this is a synchronized method. However, need 549 // to check that the object has not been unlocked by an explicit monitorexit bytecode. 550 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock)); 551 lea (rdx, monitor); // address of first monitor 552 553 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes())); 554 testptr(rax, rax); 555 jcc (Assembler::notZero, unlock); 556 557 pop(state); 558 if (throw_monitor_exception) { 559 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 560 561 // Entry already unlocked, need to throw exception 562 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); 563 should_not_reach_here(); 564 } else { 565 // Monitor already unlocked during a stack unroll. 566 // If requested, install an illegal_monitor_state_exception. 567 // Continue with stack unrolling. 568 if (install_monitor_exception) { 569 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 570 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); 571 } 572 jmp(unlocked); 573 } 574 575 bind(unlock); 576 unlock_object(rdx); 577 pop(state); 578 579 // Check that for block-structured locking (i.e., that all locked objects has been unlocked) 580 bind(unlocked); 581 582 // rax, rdx: Might contain return value 583 584 // Check that all monitors are unlocked 585 { 586 Label loop, exception, entry, restart; 587 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 588 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 589 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 590 591 bind(restart); 592 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry 593 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block 594 jmp(entry); 595 596 // Entry already locked, need to throw exception 597 bind(exception); 598 599 if (throw_monitor_exception) { 600 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 601 602 // Throw exception 603 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); 604 should_not_reach_here(); 605 } else { 606 // Stack unrolling. Unlock object and install illegal_monitor_exception 607 // Unlock does not block, so don't have to worry about the frame 608 609 push(state); 610 mov(rdx, rcx); 611 unlock_object(rdx); 612 pop(state); 613 614 if (install_monitor_exception) { 615 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 616 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); 617 } 618 619 jmp(restart); 620 } 621 622 bind(loop); 623 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used 624 jcc(Assembler::notEqual, exception); 625 626 addptr(rcx, entry_size); // otherwise advance to next entry 627 bind(entry); 628 cmpptr(rcx, rbx); // check if bottom reached 629 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 630 } 631 632 bind(no_unlock); 633 634 // jvmti support 635 if (notify_jvmdi) { 636 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 637 } else { 638 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 639 } 640 641 // remove activation 642 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp 643 leave(); // remove frame anchor 644 pop(ret_addr); // get return address 645 mov(rsp, rbx); // set sp to sender sp 646 if (UseSSE) { 647 // float and double are returned in xmm register in SSE-mode 648 if (state == ftos && UseSSE >= 1) { 649 subptr(rsp, wordSize); 650 fstp_s(Address(rsp, 0)); 651 movflt(xmm0, Address(rsp, 0)); 652 addptr(rsp, wordSize); 653 } else if (state == dtos && UseSSE >= 2) { 654 subptr(rsp, 2*wordSize); 655 fstp_d(Address(rsp, 0)); 656 movdbl(xmm0, Address(rsp, 0)); 657 addptr(rsp, 2*wordSize); 658 } 659 } 660 } 661 662 #endif /* !CC_INTERP */ 663 664 665 // Lock object 666 // 667 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must 668 // be initialized with object to lock 669 void InterpreterMacroAssembler::lock_object(Register lock_reg) { 670 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx"); 671 672 if (UseHeavyMonitors) { 673 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg); 674 } else { 675 676 Label done; 677 678 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction 679 const Register obj_reg = rcx; // Will contain the oop 680 681 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 682 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 683 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes(); 684 685 Label slow_case; 686 687 // Load object pointer into obj_reg %rcx 688 movptr(obj_reg, Address(lock_reg, obj_offset)); 689 690 if (UseBiasedLocking) { 691 // Note: we use noreg for the temporary register since it's hard 692 // to come up with a free register on all incoming code paths 693 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case); 694 } 695 696 // Load immediate 1 into swap_reg %rax, 697 movptr(swap_reg, (int32_t)1); 698 699 // Load (object->mark() | 1) into swap_reg %rax, 700 orptr(swap_reg, Address(obj_reg, 0)); 701 702 // Save (object->mark() | 1) into BasicLock's displaced header 703 movptr(Address(lock_reg, mark_offset), swap_reg); 704 705 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock"); 706 if (os::is_MP()) { 707 lock(); 708 } 709 cmpxchgptr(lock_reg, Address(obj_reg, 0)); 710 if (PrintBiasedLockingStatistics) { 711 cond_inc32(Assembler::zero, 712 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 713 } 714 jcc(Assembler::zero, done); 715 716 // Test if the oopMark is an obvious stack pointer, i.e., 717 // 1) (mark & 3) == 0, and 718 // 2) rsp <= mark < mark + os::pagesize() 719 // 720 // These 3 tests can be done by evaluating the following 721 // expression: ((mark - rsp) & (3 - os::vm_page_size())), 722 // assuming both stack pointer and pagesize have their 723 // least significant 2 bits clear. 724 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg 725 subptr(swap_reg, rsp); 726 andptr(swap_reg, 3 - os::vm_page_size()); 727 728 // Save the test result, for recursive case, the result is zero 729 movptr(Address(lock_reg, mark_offset), swap_reg); 730 731 if (PrintBiasedLockingStatistics) { 732 cond_inc32(Assembler::zero, 733 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 734 } 735 jcc(Assembler::zero, done); 736 737 bind(slow_case); 738 739 // Call the runtime routine for slow case 740 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg); 741 742 bind(done); 743 } 744 } 745 746 747 // Unlocks an object. Used in monitorexit bytecode and remove_activation. 748 // 749 // Argument: rdx : Points to BasicObjectLock structure for lock 750 // Throw an IllegalMonitorException if object is not locked by current thread 751 // 752 // Uses: rax, rbx, rcx, rdx 753 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 754 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx"); 755 756 if (UseHeavyMonitors) { 757 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg); 758 } else { 759 Label done; 760 761 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction 762 const Register header_reg = rbx; // Will contain the old oopMark 763 const Register obj_reg = rcx; // Will contain the oop 764 765 save_bcp(); // Save in case of exception 766 767 // Convert from BasicObjectLock structure to object and BasicLock structure 768 // Store the BasicLock address into %rax, 769 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 770 771 // Load oop into obj_reg(%rcx) 772 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ())); 773 774 // Free entry 775 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD); 776 777 if (UseBiasedLocking) { 778 biased_locking_exit(obj_reg, header_reg, done); 779 } 780 781 // Load the old header from BasicLock structure 782 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes())); 783 784 // Test for recursion 785 testptr(header_reg, header_reg); 786 787 // zero for recursive case 788 jcc(Assembler::zero, done); 789 790 // Atomic swap back the old header 791 if (os::is_MP()) lock(); 792 cmpxchgptr(header_reg, Address(obj_reg, 0)); 793 794 // zero for recursive case 795 jcc(Assembler::zero, done); 796 797 // Call the runtime routine for slow case. 798 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj 799 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg); 800 801 bind(done); 802 803 restore_bcp(); 804 } 805 } 806 807 808 #ifndef CC_INTERP 809 810 // Test ImethodDataPtr. If it is null, continue at the specified label 811 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) { 812 assert(ProfileInterpreter, "must be profiling interpreter"); 813 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); 814 testptr(mdp, mdp); 815 jcc(Assembler::zero, zero_continue); 816 } 817 818 819 // Set the method data pointer for the current bcp. 820 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 821 assert(ProfileInterpreter, "must be profiling interpreter"); 822 Label set_mdp; 823 push(rax); 824 push(rbx); 825 826 get_method(rbx); 827 // Test MDO to avoid the call if it is NULL. 828 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); 829 testptr(rax, rax); 830 jcc(Assembler::zero, set_mdp); 831 // rbx,: method 832 // rsi: bcp 833 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi); 834 // rax,: mdi 835 // mdo is guaranteed to be non-zero here, we checked for it before the call. 836 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); 837 addptr(rbx, in_bytes(methodDataOopDesc::data_offset())); 838 addptr(rax, rbx); 839 bind(set_mdp); 840 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); 841 pop(rbx); 842 pop(rax); 843 } 844 845 void InterpreterMacroAssembler::verify_method_data_pointer() { 846 assert(ProfileInterpreter, "must be profiling interpreter"); 847 #ifdef ASSERT 848 Label verify_continue; 849 push(rax); 850 push(rbx); 851 push(rcx); 852 push(rdx); 853 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue 854 get_method(rbx); 855 856 // If the mdp is valid, it will point to a DataLayout header which is 857 // consistent with the bcp. The converse is highly probable also. 858 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset()))); 859 addptr(rdx, Address(rbx, methodOopDesc::const_offset())); 860 lea(rdx, Address(rdx, constMethodOopDesc::codes_offset())); 861 cmpptr(rdx, rsi); 862 jcc(Assembler::equal, verify_continue); 863 // rbx,: method 864 // rsi: bcp 865 // rcx: mdp 866 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx); 867 bind(verify_continue); 868 pop(rdx); 869 pop(rcx); 870 pop(rbx); 871 pop(rax); 872 #endif // ASSERT 873 } 874 875 876 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) { 877 // %%% this seems to be used to store counter data which is surely 32bits 878 // however 64bit side stores 64 bits which seems wrong 879 assert(ProfileInterpreter, "must be profiling interpreter"); 880 Address data(mdp_in, constant); 881 movptr(data, value); 882 } 883 884 885 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 886 int constant, 887 bool decrement) { 888 // Counter address 889 Address data(mdp_in, constant); 890 891 increment_mdp_data_at(data, decrement); 892 } 893 894 895 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 896 bool decrement) { 897 898 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" ); 899 assert(ProfileInterpreter, "must be profiling interpreter"); 900 901 // %%% 64bit treats this as 64 bit which seems unlikely 902 if (decrement) { 903 // Decrement the register. Set condition codes. 904 addl(data, -DataLayout::counter_increment); 905 // If the decrement causes the counter to overflow, stay negative 906 Label L; 907 jcc(Assembler::negative, L); 908 addl(data, DataLayout::counter_increment); 909 bind(L); 910 } else { 911 assert(DataLayout::counter_increment == 1, 912 "flow-free idiom only works with 1"); 913 // Increment the register. Set carry flag. 914 addl(data, DataLayout::counter_increment); 915 // If the increment causes the counter to overflow, pull back by 1. 916 sbbl(data, 0); 917 } 918 } 919 920 921 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 922 Register reg, 923 int constant, 924 bool decrement) { 925 Address data(mdp_in, reg, Address::times_1, constant); 926 927 increment_mdp_data_at(data, decrement); 928 } 929 930 931 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) { 932 assert(ProfileInterpreter, "must be profiling interpreter"); 933 int header_offset = in_bytes(DataLayout::header_offset()); 934 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); 935 // Set the flag 936 orl(Address(mdp_in, header_offset), header_bits); 937 } 938 939 940 941 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 942 int offset, 943 Register value, 944 Register test_value_out, 945 Label& not_equal_continue) { 946 assert(ProfileInterpreter, "must be profiling interpreter"); 947 if (test_value_out == noreg) { 948 cmpptr(value, Address(mdp_in, offset)); 949 } else { 950 // Put the test value into a register, so caller can use it: 951 movptr(test_value_out, Address(mdp_in, offset)); 952 cmpptr(test_value_out, value); 953 } 954 jcc(Assembler::notEqual, not_equal_continue); 955 } 956 957 958 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) { 959 assert(ProfileInterpreter, "must be profiling interpreter"); 960 Address disp_address(mdp_in, offset_of_disp); 961 addptr(mdp_in,disp_address); 962 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); 963 } 964 965 966 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) { 967 assert(ProfileInterpreter, "must be profiling interpreter"); 968 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 969 addptr(mdp_in, disp_address); 970 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); 971 } 972 973 974 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) { 975 assert(ProfileInterpreter, "must be profiling interpreter"); 976 addptr(mdp_in, constant); 977 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); 978 } 979 980 981 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 982 assert(ProfileInterpreter, "must be profiling interpreter"); 983 push(return_bci); // save/restore across call_VM 984 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci); 985 pop(return_bci); 986 } 987 988 989 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) { 990 if (ProfileInterpreter) { 991 Label profile_continue; 992 993 // If no method data exists, go to profile_continue. 994 // Otherwise, assign to mdp 995 test_method_data_pointer(mdp, profile_continue); 996 997 // We are taking a branch. Increment the taken count. 998 // We inline increment_mdp_data_at to return bumped_count in a register 999 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1000 Address data(mdp, in_bytes(JumpData::taken_offset())); 1001 1002 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit 1003 movl(bumped_count,data); 1004 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" ); 1005 addl(bumped_count, DataLayout::counter_increment); 1006 sbbl(bumped_count, 0); 1007 movl(data,bumped_count); // Store back out 1008 1009 // The method data pointer needs to be updated to reflect the new target. 1010 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1011 bind (profile_continue); 1012 } 1013 } 1014 1015 1016 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1017 if (ProfileInterpreter) { 1018 Label profile_continue; 1019 1020 // If no method data exists, go to profile_continue. 1021 test_method_data_pointer(mdp, profile_continue); 1022 1023 // We are taking a branch. Increment the not taken count. 1024 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1025 1026 // The method data pointer needs to be updated to correspond to the next bytecode 1027 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1028 bind (profile_continue); 1029 } 1030 } 1031 1032 1033 void InterpreterMacroAssembler::profile_call(Register mdp) { 1034 if (ProfileInterpreter) { 1035 Label profile_continue; 1036 1037 // If no method data exists, go to profile_continue. 1038 test_method_data_pointer(mdp, profile_continue); 1039 1040 // We are making a call. Increment the count. 1041 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1042 1043 // The method data pointer needs to be updated to reflect the new target. 1044 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1045 bind (profile_continue); 1046 } 1047 } 1048 1049 1050 void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1051 if (ProfileInterpreter) { 1052 Label profile_continue; 1053 1054 // If no method data exists, go to profile_continue. 1055 test_method_data_pointer(mdp, profile_continue); 1056 1057 // We are making a call. Increment the count. 1058 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1059 1060 // The method data pointer needs to be updated to reflect the new target. 1061 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1062 bind (profile_continue); 1063 } 1064 } 1065 1066 1067 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp, 1068 Register reg2, 1069 bool receiver_can_be_null) { 1070 if (ProfileInterpreter) { 1071 Label profile_continue; 1072 1073 // If no method data exists, go to profile_continue. 1074 test_method_data_pointer(mdp, profile_continue); 1075 1076 Label skip_receiver_profile; 1077 if (receiver_can_be_null) { 1078 Label not_null; 1079 testptr(receiver, receiver); 1080 jccb(Assembler::notZero, not_null); 1081 // We are making a call. Increment the count for null receiver. 1082 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1083 jmp(skip_receiver_profile); 1084 bind(not_null); 1085 } 1086 1087 // Record the receiver type. 1088 record_klass_in_profile(receiver, mdp, reg2, true); 1089 bind(skip_receiver_profile); 1090 1091 // The method data pointer needs to be updated to reflect the new target. 1092 update_mdp_by_constant(mdp, 1093 in_bytes(VirtualCallData:: 1094 virtual_call_data_size())); 1095 bind(profile_continue); 1096 } 1097 } 1098 1099 1100 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1101 Register receiver, Register mdp, 1102 Register reg2, int start_row, 1103 Label& done, bool is_virtual_call) { 1104 if (TypeProfileWidth == 0) { 1105 if (is_virtual_call) { 1106 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1107 } 1108 return; 1109 } 1110 1111 int last_row = VirtualCallData::row_limit() - 1; 1112 assert(start_row <= last_row, "must be work left to do"); 1113 // Test this row for both the receiver and for null. 1114 // Take any of three different outcomes: 1115 // 1. found receiver => increment count and goto done 1116 // 2. found null => keep looking for case 1, maybe allocate this cell 1117 // 3. found something else => keep looking for cases 1 and 2 1118 // Case 3 is handled by a recursive call. 1119 for (int row = start_row; row <= last_row; row++) { 1120 Label next_test; 1121 bool test_for_null_also = (row == start_row); 1122 1123 // See if the receiver is receiver[n]. 1124 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); 1125 test_mdp_data_at(mdp, recvr_offset, receiver, 1126 (test_for_null_also ? reg2 : noreg), 1127 next_test); 1128 // (Reg2 now contains the receiver from the CallData.) 1129 1130 // The receiver is receiver[n]. Increment count[n]. 1131 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); 1132 increment_mdp_data_at(mdp, count_offset); 1133 jmp(done); 1134 bind(next_test); 1135 1136 if (row == start_row) { 1137 Label found_null; 1138 // Failed the equality check on receiver[n]... Test for null. 1139 testptr(reg2, reg2); 1140 if (start_row == last_row) { 1141 // The only thing left to do is handle the null case. 1142 if (is_virtual_call) { 1143 jccb(Assembler::zero, found_null); 1144 // Receiver did not match any saved receiver and there is no empty row for it. 1145 // Increment total counter to indicate polymorphic case. 1146 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1147 jmp(done); 1148 bind(found_null); 1149 } else { 1150 jcc(Assembler::notZero, done); 1151 } 1152 break; 1153 } 1154 // Since null is rare, make it be the branch-taken case. 1155 jcc(Assembler::zero, found_null); 1156 1157 // Put all the "Case 3" tests here. 1158 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); 1159 1160 // Found a null. Keep searching for a matching receiver, 1161 // but remember that this is an empty (unused) slot. 1162 bind(found_null); 1163 } 1164 } 1165 1166 // In the fall-through case, we found no matching receiver, but we 1167 // observed the receiver[start_row] is NULL. 1168 1169 // Fill in the receiver field and increment the count. 1170 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); 1171 set_mdp_data_at(mdp, recvr_offset, receiver); 1172 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); 1173 movptr(reg2, (int32_t)DataLayout::counter_increment); 1174 set_mdp_data_at(mdp, count_offset, reg2); 1175 if (start_row > 0) { 1176 jmp(done); 1177 } 1178 } 1179 1180 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1181 Register mdp, Register reg2, 1182 bool is_virtual_call) { 1183 assert(ProfileInterpreter, "must be profiling"); 1184 Label done; 1185 1186 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1187 1188 bind (done); 1189 } 1190 1191 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) { 1192 if (ProfileInterpreter) { 1193 Label profile_continue; 1194 uint row; 1195 1196 // If no method data exists, go to profile_continue. 1197 test_method_data_pointer(mdp, profile_continue); 1198 1199 // Update the total ret count. 1200 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1201 1202 for (row = 0; row < RetData::row_limit(); row++) { 1203 Label next_test; 1204 1205 // See if return_bci is equal to bci[n]: 1206 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci, 1207 noreg, next_test); 1208 1209 // return_bci is equal to bci[n]. Increment the count. 1210 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1211 1212 // The method data pointer needs to be updated to reflect the new target. 1213 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row))); 1214 jmp(profile_continue); 1215 bind(next_test); 1216 } 1217 1218 update_mdp_for_ret(return_bci); 1219 1220 bind (profile_continue); 1221 } 1222 } 1223 1224 1225 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1226 if (ProfileInterpreter) { 1227 Label profile_continue; 1228 1229 // If no method data exists, go to profile_continue. 1230 test_method_data_pointer(mdp, profile_continue); 1231 1232 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1233 1234 // The method data pointer needs to be updated. 1235 int mdp_delta = in_bytes(BitData::bit_data_size()); 1236 if (TypeProfileCasts) { 1237 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1238 } 1239 update_mdp_by_constant(mdp, mdp_delta); 1240 1241 bind (profile_continue); 1242 } 1243 } 1244 1245 1246 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1247 if (ProfileInterpreter && TypeProfileCasts) { 1248 Label profile_continue; 1249 1250 // If no method data exists, go to profile_continue. 1251 test_method_data_pointer(mdp, profile_continue); 1252 1253 int count_offset = in_bytes(CounterData::count_offset()); 1254 // Back up the address, since we have already bumped the mdp. 1255 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1256 1257 // *Decrement* the counter. We expect to see zero or small negatives. 1258 increment_mdp_data_at(mdp, count_offset, true); 1259 1260 bind (profile_continue); 1261 } 1262 } 1263 1264 1265 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) 1266 { 1267 if (ProfileInterpreter) { 1268 Label profile_continue; 1269 1270 // If no method data exists, go to profile_continue. 1271 test_method_data_pointer(mdp, profile_continue); 1272 1273 // The method data pointer needs to be updated. 1274 int mdp_delta = in_bytes(BitData::bit_data_size()); 1275 if (TypeProfileCasts) { 1276 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1277 1278 // Record the object type. 1279 record_klass_in_profile(klass, mdp, reg2, false); 1280 assert(reg2 == rdi, "we know how to fix this blown reg"); 1281 restore_locals(); // Restore EDI 1282 } 1283 update_mdp_by_constant(mdp, mdp_delta); 1284 1285 bind(profile_continue); 1286 } 1287 } 1288 1289 1290 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1291 if (ProfileInterpreter) { 1292 Label profile_continue; 1293 1294 // If no method data exists, go to profile_continue. 1295 test_method_data_pointer(mdp, profile_continue); 1296 1297 // Update the default case count 1298 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset())); 1299 1300 // The method data pointer needs to be updated. 1301 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset())); 1302 1303 bind (profile_continue); 1304 } 1305 } 1306 1307 1308 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) { 1309 if (ProfileInterpreter) { 1310 Label profile_continue; 1311 1312 // If no method data exists, go to profile_continue. 1313 test_method_data_pointer(mdp, profile_continue); 1314 1315 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes() 1316 movptr(reg2, (int32_t)in_bytes(MultiBranchData::per_case_size())); 1317 // index is positive and so should have correct value if this code were 1318 // used on 64bits 1319 imulptr(index, reg2); 1320 addptr(index, in_bytes(MultiBranchData::case_array_offset())); 1321 1322 // Update the case count 1323 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset())); 1324 1325 // The method data pointer needs to be updated. 1326 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset())); 1327 1328 bind (profile_continue); 1329 } 1330 } 1331 1332 #endif // !CC_INTERP 1333 1334 1335 1336 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 1337 if (state == atos) MacroAssembler::verify_oop(reg); 1338 } 1339 1340 1341 #ifndef CC_INTERP 1342 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 1343 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth); 1344 } 1345 1346 #endif /* CC_INTERP */ 1347 1348 1349 void InterpreterMacroAssembler::notify_method_entry() { 1350 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1351 // track stack depth. If it is possible to enter interp_only_mode we add 1352 // the code to check if the event should be sent. 1353 if (JvmtiExport::can_post_interpreter_events()) { 1354 Label L; 1355 get_thread(rcx); 1356 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset())); 1357 testl(rcx,rcx); 1358 jcc(Assembler::zero, L); 1359 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry)); 1360 bind(L); 1361 } 1362 1363 { 1364 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0); 1365 get_thread(rcx); 1366 get_method(rbx); 1367 call_VM_leaf( 1368 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx); 1369 } 1370 1371 // RedefineClasses() tracing support for obsolete method entry 1372 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { 1373 get_thread(rcx); 1374 get_method(rbx); 1375 call_VM_leaf( 1376 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 1377 rcx, rbx); 1378 } 1379 } 1380 1381 1382 void InterpreterMacroAssembler::notify_method_exit( 1383 TosState state, NotifyMethodExitMode mode) { 1384 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1385 // track stack depth. If it is possible to enter interp_only_mode we add 1386 // the code to check if the event should be sent. 1387 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 1388 Label L; 1389 // Note: frame::interpreter_frame_result has a dependency on how the 1390 // method result is saved across the call to post_method_exit. If this 1391 // is changed then the interpreter_frame_result implementation will 1392 // need to be updated too. 1393 1394 // For c++ interpreter the result is always stored at a known location in the frame 1395 // template interpreter will leave it on the top of the stack. 1396 NOT_CC_INTERP(push(state);) 1397 get_thread(rcx); 1398 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset())); 1399 testl(rcx,rcx); 1400 jcc(Assembler::zero, L); 1401 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 1402 bind(L); 1403 NOT_CC_INTERP(pop(state);) 1404 } 1405 1406 { 1407 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0); 1408 NOT_CC_INTERP(push(state)); 1409 get_thread(rbx); 1410 get_method(rcx); 1411 call_VM_leaf( 1412 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 1413 rbx, rcx); 1414 NOT_CC_INTERP(pop(state)); 1415 } 1416 } 1417 1418 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. 1419 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 1420 int increment, int mask, 1421 Register scratch, bool preloaded, 1422 Condition cond, Label* where) { 1423 if (!preloaded) { 1424 movl(scratch, counter_addr); 1425 } 1426 incrementl(scratch, increment); 1427 movl(counter_addr, scratch); 1428 andl(scratch, mask); 1429 jcc(cond, *where); 1430 }