1 /* 2 * Copyright (c) 1997, 2012, 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/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 42 // Implementation of InterpreterMacroAssembler 43 #ifdef CC_INTERP 44 void InterpreterMacroAssembler::get_method(Register reg) { 45 movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize))); 46 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); 47 } 48 #endif // CC_INTERP 49 50 51 #ifndef CC_INTERP 52 void InterpreterMacroAssembler::call_VM_leaf_base( 53 address entry_point, 54 int number_of_arguments 55 ) { 56 // interpreter specific 57 // 58 // Note: No need to save/restore bcp & locals (rsi & rdi) pointer 59 // since these are callee saved registers and no blocking/ 60 // GC can happen in leaf calls. 61 // Further Note: DO NOT save/restore bcp/locals. If a caller has 62 // already saved them so that it can use rsi/rdi as temporaries 63 // then a save/restore here will DESTROY the copy the caller 64 // saved! There used to be a save_bcp() that only happened in 65 // the ASSERT path (no restore_bcp). Which caused bizarre failures 66 // when jvm built with ASSERTs. 67 #ifdef ASSERT 68 { Label L; 69 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 70 jcc(Assembler::equal, L); 71 stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL"); 72 bind(L); 73 } 74 #endif 75 // super call 76 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); 77 // interpreter specific 78 79 // Used to ASSERT that rsi/rdi were equal to frame's bcp/locals 80 // but since they may not have been saved (and we don't want to 81 // save them here (see note above) the assert is invalid. 82 } 83 84 85 void InterpreterMacroAssembler::call_VM_base( 86 Register oop_result, 87 Register java_thread, 88 Register last_java_sp, 89 address entry_point, 90 int number_of_arguments, 91 bool check_exceptions 92 ) { 93 #ifdef ASSERT 94 { Label L; 95 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 96 jcc(Assembler::equal, L); 97 stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL"); 98 bind(L); 99 } 100 #endif /* ASSERT */ 101 // interpreter specific 102 // 103 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't 104 // really make a difference for these runtime calls, since they are 105 // slow anyway. Btw., bcp must be saved/restored since it may change 106 // due to GC. 107 assert(java_thread == noreg , "not expecting a precomputed java thread"); 108 save_bcp(); 109 // super call 110 MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions); 111 // interpreter specific 112 restore_bcp(); 113 restore_locals(); 114 } 115 116 117 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { 118 if (JvmtiExport::can_pop_frame()) { 119 Label L; 120 // Initiate popframe handling only if it is not already being processed. If the flag 121 // has the popframe_processing bit set, it means that this code is called *during* popframe 122 // handling - we don't want to reenter. 123 Register pop_cond = java_thread; // Not clear if any other register is available... 124 movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset())); 125 testl(pop_cond, JavaThread::popframe_pending_bit); 126 jcc(Assembler::zero, L); 127 testl(pop_cond, JavaThread::popframe_processing_bit); 128 jcc(Assembler::notZero, L); 129 // Call Interpreter::remove_activation_preserving_args_entry() to get the 130 // address of the same-named entrypoint in the generated interpreter code. 131 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); 132 jmp(rax); 133 bind(L); 134 get_thread(java_thread); 135 } 136 } 137 138 139 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { 140 get_thread(rcx); 141 movl(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset())); 142 const Address tos_addr (rcx, JvmtiThreadState::earlyret_tos_offset()); 143 const Address oop_addr (rcx, JvmtiThreadState::earlyret_oop_offset()); 144 const Address val_addr (rcx, JvmtiThreadState::earlyret_value_offset()); 145 const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset() 146 + in_ByteSize(wordSize)); 147 switch (state) { 148 case atos: movptr(rax, oop_addr); 149 movptr(oop_addr, NULL_WORD); 150 verify_oop(rax, state); break; 151 case ltos: 152 movl(rdx, val_addr1); // fall through 153 case btos: // fall through 154 case ctos: // fall through 155 case stos: // fall through 156 case itos: movl(rax, val_addr); break; 157 case ftos: fld_s(val_addr); break; 158 case dtos: fld_d(val_addr); break; 159 case vtos: /* nothing to do */ break; 160 default : ShouldNotReachHere(); 161 } 162 // Clean up tos value in the thread object 163 movl(tos_addr, (int32_t) ilgl); 164 movptr(val_addr, NULL_WORD); 165 NOT_LP64(movptr(val_addr1, NULL_WORD)); 166 } 167 168 169 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { 170 if (JvmtiExport::can_force_early_return()) { 171 Label L; 172 Register tmp = java_thread; 173 movptr(tmp, Address(tmp, JavaThread::jvmti_thread_state_offset())); 174 testptr(tmp, tmp); 175 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; 176 177 // Initiate earlyret handling only if it is not already being processed. 178 // If the flag has the earlyret_processing bit set, it means that this code 179 // is called *during* earlyret handling - we don't want to reenter. 180 movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset())); 181 cmpl(tmp, JvmtiThreadState::earlyret_pending); 182 jcc(Assembler::notEqual, L); 183 184 // Call Interpreter::remove_activation_early_entry() to get the address of the 185 // same-named entrypoint in the generated interpreter code. 186 get_thread(java_thread); 187 movptr(tmp, Address(java_thread, JavaThread::jvmti_thread_state_offset())); 188 pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset())); 189 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1); 190 jmp(rax); 191 bind(L); 192 get_thread(java_thread); 193 } 194 } 195 196 197 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) { 198 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); 199 movl(reg, Address(rsi, bcp_offset)); 200 bswapl(reg); 201 shrl(reg, 16); 202 } 203 204 205 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register reg, int bcp_offset, size_t index_size) { 206 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); 207 if (index_size == sizeof(u2)) { 208 load_unsigned_short(reg, Address(rsi, bcp_offset)); 209 } else if (index_size == sizeof(u4)) { 210 assert(EnableInvokeDynamic, "giant index used only for JSR 292"); 211 movl(reg, Address(rsi, bcp_offset)); 212 // Check if the secondary index definition is still ~x, otherwise 213 // we have to change the following assembler code to calculate the 214 // plain index. 215 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); 216 notl(reg); // convert to plain index 217 } else if (index_size == sizeof(u1)) { 218 load_unsigned_byte(reg, Address(rsi, bcp_offset)); 219 } else { 220 ShouldNotReachHere(); 221 } 222 } 223 224 225 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, Register index, 226 int bcp_offset, size_t index_size) { 227 assert_different_registers(cache, index); 228 get_cache_index_at_bcp(index, bcp_offset, index_size); 229 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 230 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below"); 231 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); 232 shlptr(index, 2); // convert from field index to ConstantPoolCacheEntry index 233 } 234 235 236 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, 237 Register index, 238 Register bytecode, 239 int byte_no, 240 int bcp_offset, 241 size_t index_size) { 242 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); 243 movptr(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); 244 const int shift_count = (1 + byte_no) * BitsPerByte; 245 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || 246 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), 247 "correct shift count"); 248 shrptr(bytecode, shift_count); 249 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); 250 andptr(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); 251 } 252 253 254 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, Register tmp, 255 int bcp_offset, size_t index_size) { 256 assert(cache != tmp, "must use different register"); 257 get_cache_index_at_bcp(tmp, bcp_offset, index_size); 258 assert(sizeof(ConstantPoolCacheEntry) == 4*wordSize, "adjust code below"); 259 // convert from field index to ConstantPoolCacheEntry index 260 // and from word offset to byte offset 261 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); 262 shll(tmp, 2 + LogBytesPerWord); 263 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); 264 // skip past the header 265 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); 266 addptr(cache, tmp); // construct pointer to cache entry 267 } 268 269 // Load object from cpool->resolved_references(index) 270 void InterpreterMacroAssembler::load_resolved_reference_at_index( 271 Register result, Register index) { 272 assert_different_registers(result, index); 273 // convert from field index to resolved_references() index and from 274 // word index to byte offset. Since this is a java object, it can be compressed 275 Register tmp = index; // reuse 276 shll(tmp, LogBytesPerHeapOop); 277 278 get_constant_pool(result); 279 // load pointer for resolved_references[] objArray 280 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); 281 // JNIHandles::resolve(obj); 282 movptr(result, Address(result, 0)); 283 // Add in the index 284 addptr(result, tmp); 285 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); 286 } 287 288 // Generate a subtype check: branch to ok_is_subtype if sub_klass is 289 // a subtype of super_klass. EAX holds the super_klass. Blows ECX. 290 // Resets EDI to locals. Register sub_klass cannot be any of the above. 291 void InterpreterMacroAssembler::gen_subtype_check( Register Rsub_klass, Label &ok_is_subtype ) { 292 assert( Rsub_klass != rax, "rax, holds superklass" ); 293 assert( Rsub_klass != rcx, "used as a temp" ); 294 assert( Rsub_klass != rdi, "used as a temp, restored from locals" ); 295 296 // Profile the not-null value's klass. 297 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi 298 299 // Do the check. 300 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx 301 302 // Profile the failure of the check. 303 profile_typecheck_failed(rcx); // blows rcx 304 } 305 306 void InterpreterMacroAssembler::f2ieee() { 307 if (IEEEPrecision) { 308 fstp_s(Address(rsp, 0)); 309 fld_s(Address(rsp, 0)); 310 } 311 } 312 313 314 void InterpreterMacroAssembler::d2ieee() { 315 if (IEEEPrecision) { 316 fstp_d(Address(rsp, 0)); 317 fld_d(Address(rsp, 0)); 318 } 319 } 320 321 // Java Expression Stack 322 323 void InterpreterMacroAssembler::pop_ptr(Register r) { 324 pop(r); 325 } 326 327 void InterpreterMacroAssembler::pop_i(Register r) { 328 pop(r); 329 } 330 331 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) { 332 pop(lo); 333 pop(hi); 334 } 335 336 void InterpreterMacroAssembler::pop_f() { 337 fld_s(Address(rsp, 0)); 338 addptr(rsp, 1 * wordSize); 339 } 340 341 void InterpreterMacroAssembler::pop_d() { 342 fld_d(Address(rsp, 0)); 343 addptr(rsp, 2 * wordSize); 344 } 345 346 347 void InterpreterMacroAssembler::pop(TosState state) { 348 switch (state) { 349 case atos: pop_ptr(rax); break; 350 case btos: // fall through 351 case ctos: // fall through 352 case stos: // fall through 353 case itos: pop_i(rax); break; 354 case ltos: pop_l(rax, rdx); break; 355 case ftos: pop_f(); break; 356 case dtos: pop_d(); break; 357 case vtos: /* nothing to do */ break; 358 default : ShouldNotReachHere(); 359 } 360 verify_oop(rax, state); 361 } 362 363 void InterpreterMacroAssembler::push_ptr(Register r) { 364 push(r); 365 } 366 367 void InterpreterMacroAssembler::push_i(Register r) { 368 push(r); 369 } 370 371 void InterpreterMacroAssembler::push_l(Register lo, Register hi) { 372 push(hi); 373 push(lo); 374 } 375 376 void InterpreterMacroAssembler::push_f() { 377 // Do not schedule for no AGI! Never write beyond rsp! 378 subptr(rsp, 1 * wordSize); 379 fstp_s(Address(rsp, 0)); 380 } 381 382 void InterpreterMacroAssembler::push_d(Register r) { 383 // Do not schedule for no AGI! Never write beyond rsp! 384 subptr(rsp, 2 * wordSize); 385 fstp_d(Address(rsp, 0)); 386 } 387 388 389 void InterpreterMacroAssembler::push(TosState state) { 390 verify_oop(rax, state); 391 switch (state) { 392 case atos: push_ptr(rax); break; 393 case btos: // fall through 394 case ctos: // fall through 395 case stos: // fall through 396 case itos: push_i(rax); break; 397 case ltos: push_l(rax, rdx); break; 398 case ftos: push_f(); break; 399 case dtos: push_d(rax); break; 400 case vtos: /* nothing to do */ break; 401 default : ShouldNotReachHere(); 402 } 403 } 404 405 406 // Helpers for swap and dup 407 void InterpreterMacroAssembler::load_ptr(int n, Register val) { 408 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); 409 } 410 411 void InterpreterMacroAssembler::store_ptr(int n, Register val) { 412 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); 413 } 414 415 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { 416 // set sender sp 417 lea(rsi, Address(rsp, wordSize)); 418 // record last_sp 419 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), rsi); 420 } 421 422 423 // Jump to from_interpreted entry of a call unless single stepping is possible 424 // in this thread in which case we must call the i2i entry 425 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { 426 prepare_to_jump_from_interpreted(); 427 428 if (JvmtiExport::can_post_interpreter_events()) { 429 Label run_compiled_code; 430 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 431 // compiled code in threads for which the event is enabled. Check here for 432 // interp_only_mode if these events CAN be enabled. 433 get_thread(temp); 434 // interp_only is an int, on little endian it is sufficient to test the byte only 435 // Is a cmpl faster? 436 cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0); 437 jccb(Assembler::zero, run_compiled_code); 438 jmp(Address(method, Method::interpreter_entry_offset())); 439 bind(run_compiled_code); 440 } 441 442 jmp(Address(method, Method::from_interpreted_offset())); 443 444 } 445 446 447 // The following two routines provide a hook so that an implementation 448 // can schedule the dispatch in two parts. Intel does not do this. 449 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { 450 // Nothing Intel-specific to be done here. 451 } 452 453 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { 454 dispatch_next(state, step); 455 } 456 457 void InterpreterMacroAssembler::dispatch_base(TosState state, address* table, 458 bool verifyoop) { 459 verify_FPU(1, state); 460 if (VerifyActivationFrameSize) { 461 Label L; 462 mov(rcx, rbp); 463 subptr(rcx, rsp); 464 int min_frame_size = (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * wordSize; 465 cmpptr(rcx, min_frame_size); 466 jcc(Assembler::greaterEqual, L); 467 stop("broken stack frame"); 468 bind(L); 469 } 470 if (verifyoop) verify_oop(rax, state); 471 Address index(noreg, rbx, Address::times_ptr); 472 ExternalAddress tbl((address)table); 473 ArrayAddress dispatch(tbl, index); 474 jump(dispatch); 475 } 476 477 478 void InterpreterMacroAssembler::dispatch_only(TosState state) { 479 dispatch_base(state, Interpreter::dispatch_table(state)); 480 } 481 482 483 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { 484 dispatch_base(state, Interpreter::normal_table(state)); 485 } 486 487 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { 488 dispatch_base(state, Interpreter::normal_table(state), false); 489 } 490 491 492 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { 493 // load next bytecode (load before advancing rsi to prevent AGI) 494 load_unsigned_byte(rbx, Address(rsi, step)); 495 // advance rsi 496 increment(rsi, step); 497 dispatch_base(state, Interpreter::dispatch_table(state)); 498 } 499 500 501 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 502 // load current bytecode 503 load_unsigned_byte(rbx, Address(rsi, 0)); 504 dispatch_base(state, table); 505 } 506 507 // remove activation 508 // 509 // Unlock the receiver if this is a synchronized method. 510 // Unlock any Java monitors from syncronized blocks. 511 // Remove the activation from the stack. 512 // 513 // If there are locked Java monitors 514 // If throw_monitor_exception 515 // throws IllegalMonitorStateException 516 // Else if install_monitor_exception 517 // installs IllegalMonitorStateException 518 // Else 519 // no error processing 520 void InterpreterMacroAssembler::remove_activation(TosState state, Register ret_addr, 521 bool throw_monitor_exception, 522 bool install_monitor_exception, 523 bool notify_jvmdi) { 524 // Note: Registers rax, rdx and FPU ST(0) may be in use for the result 525 // check if synchronized method 526 Label unlocked, unlock, no_unlock; 527 528 get_thread(rcx); 529 const Address do_not_unlock_if_synchronized(rcx, 530 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 531 532 movbool(rbx, do_not_unlock_if_synchronized); 533 mov(rdi,rbx); 534 movbool(do_not_unlock_if_synchronized, false); // reset the flag 535 536 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); // get method access flags 537 movl(rcx, Address(rbx, Method::access_flags_offset())); 538 539 testl(rcx, JVM_ACC_SYNCHRONIZED); 540 jcc(Assembler::zero, unlocked); 541 542 // Don't unlock anything if the _do_not_unlock_if_synchronized flag 543 // is set. 544 mov(rcx,rdi); 545 testbool(rcx); 546 jcc(Assembler::notZero, no_unlock); 547 548 // unlock monitor 549 push(state); // save result 550 551 // BasicObjectLock will be first in list, since this is a synchronized method. However, need 552 // to check that the object has not been unlocked by an explicit monitorexit bytecode. 553 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock)); 554 lea (rdx, monitor); // address of first monitor 555 556 movptr (rax, Address(rdx, BasicObjectLock::obj_offset_in_bytes())); 557 testptr(rax, rax); 558 jcc (Assembler::notZero, unlock); 559 560 pop(state); 561 if (throw_monitor_exception) { 562 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 563 564 // Entry already unlocked, need to throw exception 565 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); 566 should_not_reach_here(); 567 } else { 568 // Monitor already unlocked during a stack unroll. 569 // If requested, install an illegal_monitor_state_exception. 570 // Continue with stack unrolling. 571 if (install_monitor_exception) { 572 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 573 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); 574 } 575 jmp(unlocked); 576 } 577 578 bind(unlock); 579 unlock_object(rdx); 580 pop(state); 581 582 // Check that for block-structured locking (i.e., that all locked objects has been unlocked) 583 bind(unlocked); 584 585 // rax, rdx: Might contain return value 586 587 // Check that all monitors are unlocked 588 { 589 Label loop, exception, entry, restart; 590 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 591 const Address monitor_block_top(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 592 const Address monitor_block_bot(rbp, frame::interpreter_frame_initial_sp_offset * wordSize); 593 594 bind(restart); 595 movptr(rcx, monitor_block_top); // points to current entry, starting with top-most entry 596 lea(rbx, monitor_block_bot); // points to word before bottom of monitor block 597 jmp(entry); 598 599 // Entry already locked, need to throw exception 600 bind(exception); 601 602 if (throw_monitor_exception) { 603 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 604 605 // Throw exception 606 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); 607 should_not_reach_here(); 608 } else { 609 // Stack unrolling. Unlock object and install illegal_monitor_exception 610 // Unlock does not block, so don't have to worry about the frame 611 612 push(state); 613 mov(rdx, rcx); 614 unlock_object(rdx); 615 pop(state); 616 617 if (install_monitor_exception) { 618 empty_FPU_stack(); // remove possible return value from FPU-stack, otherwise stack could overflow 619 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); 620 } 621 622 jmp(restart); 623 } 624 625 bind(loop); 626 cmpptr(Address(rcx, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); // check if current entry is used 627 jcc(Assembler::notEqual, exception); 628 629 addptr(rcx, entry_size); // otherwise advance to next entry 630 bind(entry); 631 cmpptr(rcx, rbx); // check if bottom reached 632 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry 633 } 634 635 bind(no_unlock); 636 637 // jvmti support 638 if (notify_jvmdi) { 639 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA 640 } else { 641 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA 642 } 643 644 // remove activation 645 movptr(rbx, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp 646 leave(); // remove frame anchor 647 pop(ret_addr); // get return address 648 mov(rsp, rbx); // set sp to sender sp 649 if (UseSSE) { 650 // float and double are returned in xmm register in SSE-mode 651 if (state == ftos && UseSSE >= 1) { 652 subptr(rsp, wordSize); 653 fstp_s(Address(rsp, 0)); 654 movflt(xmm0, Address(rsp, 0)); 655 addptr(rsp, wordSize); 656 } else if (state == dtos && UseSSE >= 2) { 657 subptr(rsp, 2*wordSize); 658 fstp_d(Address(rsp, 0)); 659 movdbl(xmm0, Address(rsp, 0)); 660 addptr(rsp, 2*wordSize); 661 } 662 } 663 } 664 665 #endif /* !CC_INTERP */ 666 667 668 // Lock object 669 // 670 // Argument: rdx : Points to BasicObjectLock to be used for locking. Must 671 // be initialized with object to lock 672 void InterpreterMacroAssembler::lock_object(Register lock_reg) { 673 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx"); 674 675 if (UseHeavyMonitors) { 676 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg); 677 } else { 678 679 Label done; 680 681 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction 682 const Register obj_reg = rcx; // Will contain the oop 683 684 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); 685 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); 686 const int mark_offset = lock_offset + BasicLock::displaced_header_offset_in_bytes(); 687 688 Label slow_case; 689 690 // Load object pointer into obj_reg %rcx 691 movptr(obj_reg, Address(lock_reg, obj_offset)); 692 693 if (UseBiasedLocking) { 694 // Note: we use noreg for the temporary register since it's hard 695 // to come up with a free register on all incoming code paths 696 biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false, done, &slow_case); 697 } 698 699 // Load immediate 1 into swap_reg %rax, 700 movptr(swap_reg, (int32_t)1); 701 702 // Load (object->mark() | 1) into swap_reg %rax, 703 orptr(swap_reg, Address(obj_reg, 0)); 704 705 // Save (object->mark() | 1) into BasicLock's displaced header 706 movptr(Address(lock_reg, mark_offset), swap_reg); 707 708 assert(lock_offset == 0, "displached header must be first word in BasicObjectLock"); 709 if (os::is_MP()) { 710 lock(); 711 } 712 cmpxchgptr(lock_reg, Address(obj_reg, 0)); 713 if (PrintBiasedLockingStatistics) { 714 cond_inc32(Assembler::zero, 715 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 716 } 717 jcc(Assembler::zero, done); 718 719 // Test if the oopMark is an obvious stack pointer, i.e., 720 // 1) (mark & 3) == 0, and 721 // 2) rsp <= mark < mark + os::pagesize() 722 // 723 // These 3 tests can be done by evaluating the following 724 // expression: ((mark - rsp) & (3 - os::vm_page_size())), 725 // assuming both stack pointer and pagesize have their 726 // least significant 2 bits clear. 727 // NOTE: the oopMark is in swap_reg %rax, as the result of cmpxchg 728 subptr(swap_reg, rsp); 729 andptr(swap_reg, 3 - os::vm_page_size()); 730 731 // Save the test result, for recursive case, the result is zero 732 movptr(Address(lock_reg, mark_offset), swap_reg); 733 734 if (PrintBiasedLockingStatistics) { 735 cond_inc32(Assembler::zero, 736 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); 737 } 738 jcc(Assembler::zero, done); 739 740 bind(slow_case); 741 742 // Call the runtime routine for slow case 743 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg); 744 745 bind(done); 746 } 747 } 748 749 750 // Unlocks an object. Used in monitorexit bytecode and remove_activation. 751 // 752 // Argument: rdx : Points to BasicObjectLock structure for lock 753 // Throw an IllegalMonitorException if object is not locked by current thread 754 // 755 // Uses: rax, rbx, rcx, rdx 756 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { 757 assert(lock_reg == rdx, "The argument is only for looks. It must be rdx"); 758 759 if (UseHeavyMonitors) { 760 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg); 761 } else { 762 Label done; 763 764 const Register swap_reg = rax; // Must use rax, for cmpxchg instruction 765 const Register header_reg = rbx; // Will contain the old oopMark 766 const Register obj_reg = rcx; // Will contain the oop 767 768 save_bcp(); // Save in case of exception 769 770 // Convert from BasicObjectLock structure to object and BasicLock structure 771 // Store the BasicLock address into %rax, 772 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); 773 774 // Load oop into obj_reg(%rcx) 775 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes ())); 776 777 // Free entry 778 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), NULL_WORD); 779 780 if (UseBiasedLocking) { 781 biased_locking_exit(obj_reg, header_reg, done); 782 } 783 784 // Load the old header from BasicLock structure 785 movptr(header_reg, Address(swap_reg, BasicLock::displaced_header_offset_in_bytes())); 786 787 // Test for recursion 788 testptr(header_reg, header_reg); 789 790 // zero for recursive case 791 jcc(Assembler::zero, done); 792 793 // Atomic swap back the old header 794 if (os::is_MP()) lock(); 795 cmpxchgptr(header_reg, Address(obj_reg, 0)); 796 797 // zero for recursive case 798 jcc(Assembler::zero, done); 799 800 // Call the runtime routine for slow case. 801 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), obj_reg); // restore obj 802 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg); 803 804 bind(done); 805 806 restore_bcp(); 807 } 808 } 809 810 811 #ifndef CC_INTERP 812 813 // Test ImethodDataPtr. If it is null, continue at the specified label 814 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, Label& zero_continue) { 815 assert(ProfileInterpreter, "must be profiling interpreter"); 816 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); 817 testptr(mdp, mdp); 818 jcc(Assembler::zero, zero_continue); 819 } 820 821 822 // Set the method data pointer for the current bcp. 823 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 824 assert(ProfileInterpreter, "must be profiling interpreter"); 825 Label set_mdp; 826 push(rax); 827 push(rbx); 828 829 get_method(rbx); 830 // Test MDO to avoid the call if it is NULL. 831 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); 832 testptr(rax, rax); 833 jcc(Assembler::zero, set_mdp); 834 // rbx,: method 835 // rsi: bcp 836 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, rsi); 837 // rax,: mdi 838 // mdo is guaranteed to be non-zero here, we checked for it before the call. 839 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); 840 addptr(rbx, in_bytes(MethodData::data_offset())); 841 addptr(rax, rbx); 842 bind(set_mdp); 843 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); 844 pop(rbx); 845 pop(rax); 846 } 847 848 void InterpreterMacroAssembler::verify_method_data_pointer() { 849 assert(ProfileInterpreter, "must be profiling interpreter"); 850 #ifdef ASSERT 851 Label verify_continue; 852 push(rax); 853 push(rbx); 854 push(rcx); 855 push(rdx); 856 test_method_data_pointer(rcx, verify_continue); // If mdp is zero, continue 857 get_method(rbx); 858 859 // If the mdp is valid, it will point to a DataLayout header which is 860 // consistent with the bcp. The converse is highly probable also. 861 load_unsigned_short(rdx, Address(rcx, in_bytes(DataLayout::bci_offset()))); 862 addptr(rdx, Address(rbx, Method::const_offset())); 863 lea(rdx, Address(rdx, ConstMethod::codes_offset())); 864 cmpptr(rdx, rsi); 865 jcc(Assembler::equal, verify_continue); 866 // rbx,: method 867 // rsi: bcp 868 // rcx: mdp 869 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), rbx, rsi, rcx); 870 bind(verify_continue); 871 pop(rdx); 872 pop(rcx); 873 pop(rbx); 874 pop(rax); 875 #endif // ASSERT 876 } 877 878 879 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, int constant, Register value) { 880 // %%% this seems to be used to store counter data which is surely 32bits 881 // however 64bit side stores 64 bits which seems wrong 882 assert(ProfileInterpreter, "must be profiling interpreter"); 883 Address data(mdp_in, constant); 884 movptr(data, value); 885 } 886 887 888 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 889 int constant, 890 bool decrement) { 891 // Counter address 892 Address data(mdp_in, constant); 893 894 increment_mdp_data_at(data, decrement); 895 } 896 897 898 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, 899 bool decrement) { 900 901 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" ); 902 assert(ProfileInterpreter, "must be profiling interpreter"); 903 904 // %%% 64bit treats this as 64 bit which seems unlikely 905 if (decrement) { 906 // Decrement the register. Set condition codes. 907 addl(data, -DataLayout::counter_increment); 908 // If the decrement causes the counter to overflow, stay negative 909 Label L; 910 jcc(Assembler::negative, L); 911 addl(data, DataLayout::counter_increment); 912 bind(L); 913 } else { 914 assert(DataLayout::counter_increment == 1, 915 "flow-free idiom only works with 1"); 916 // Increment the register. Set carry flag. 917 addl(data, DataLayout::counter_increment); 918 // If the increment causes the counter to overflow, pull back by 1. 919 sbbl(data, 0); 920 } 921 } 922 923 924 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, 925 Register reg, 926 int constant, 927 bool decrement) { 928 Address data(mdp_in, reg, Address::times_1, constant); 929 930 increment_mdp_data_at(data, decrement); 931 } 932 933 934 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, int flag_byte_constant) { 935 assert(ProfileInterpreter, "must be profiling interpreter"); 936 int header_offset = in_bytes(DataLayout::header_offset()); 937 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); 938 // Set the flag 939 orl(Address(mdp_in, header_offset), header_bits); 940 } 941 942 943 944 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, 945 int offset, 946 Register value, 947 Register test_value_out, 948 Label& not_equal_continue) { 949 assert(ProfileInterpreter, "must be profiling interpreter"); 950 if (test_value_out == noreg) { 951 cmpptr(value, Address(mdp_in, offset)); 952 } else { 953 // Put the test value into a register, so caller can use it: 954 movptr(test_value_out, Address(mdp_in, offset)); 955 cmpptr(test_value_out, value); 956 } 957 jcc(Assembler::notEqual, not_equal_continue); 958 } 959 960 961 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, int offset_of_disp) { 962 assert(ProfileInterpreter, "must be profiling interpreter"); 963 Address disp_address(mdp_in, offset_of_disp); 964 addptr(mdp_in,disp_address); 965 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); 966 } 967 968 969 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp) { 970 assert(ProfileInterpreter, "must be profiling interpreter"); 971 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); 972 addptr(mdp_in, disp_address); 973 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); 974 } 975 976 977 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, int constant) { 978 assert(ProfileInterpreter, "must be profiling interpreter"); 979 addptr(mdp_in, constant); 980 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); 981 } 982 983 984 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { 985 assert(ProfileInterpreter, "must be profiling interpreter"); 986 push(return_bci); // save/restore across call_VM 987 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci); 988 pop(return_bci); 989 } 990 991 992 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, Register bumped_count) { 993 if (ProfileInterpreter) { 994 Label profile_continue; 995 996 // If no method data exists, go to profile_continue. 997 // Otherwise, assign to mdp 998 test_method_data_pointer(mdp, profile_continue); 999 1000 // We are taking a branch. Increment the taken count. 1001 // We inline increment_mdp_data_at to return bumped_count in a register 1002 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); 1003 Address data(mdp, in_bytes(JumpData::taken_offset())); 1004 1005 // %%% 64bit treats these cells as 64 bit but they seem to be 32 bit 1006 movl(bumped_count,data); 1007 assert( DataLayout::counter_increment==1, "flow-free idiom only works with 1" ); 1008 addl(bumped_count, DataLayout::counter_increment); 1009 sbbl(bumped_count, 0); 1010 movl(data,bumped_count); // Store back out 1011 1012 // The method data pointer needs to be updated to reflect the new target. 1013 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); 1014 bind (profile_continue); 1015 } 1016 } 1017 1018 1019 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { 1020 if (ProfileInterpreter) { 1021 Label profile_continue; 1022 1023 // If no method data exists, go to profile_continue. 1024 test_method_data_pointer(mdp, profile_continue); 1025 1026 // We are taking a branch. Increment the not taken count. 1027 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); 1028 1029 // The method data pointer needs to be updated to correspond to the next bytecode 1030 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); 1031 bind (profile_continue); 1032 } 1033 } 1034 1035 1036 void InterpreterMacroAssembler::profile_call(Register mdp) { 1037 if (ProfileInterpreter) { 1038 Label profile_continue; 1039 1040 // If no method data exists, go to profile_continue. 1041 test_method_data_pointer(mdp, profile_continue); 1042 1043 // We are making a call. Increment the count. 1044 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1045 1046 // The method data pointer needs to be updated to reflect the new target. 1047 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); 1048 bind (profile_continue); 1049 } 1050 } 1051 1052 1053 void InterpreterMacroAssembler::profile_final_call(Register mdp) { 1054 if (ProfileInterpreter) { 1055 Label profile_continue; 1056 1057 // If no method data exists, go to profile_continue. 1058 test_method_data_pointer(mdp, profile_continue); 1059 1060 // We are making a call. Increment the count. 1061 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1062 1063 // The method data pointer needs to be updated to reflect the new target. 1064 update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size())); 1065 bind (profile_continue); 1066 } 1067 } 1068 1069 1070 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, Register mdp, 1071 Register reg2, 1072 bool receiver_can_be_null) { 1073 if (ProfileInterpreter) { 1074 Label profile_continue; 1075 1076 // If no method data exists, go to profile_continue. 1077 test_method_data_pointer(mdp, profile_continue); 1078 1079 Label skip_receiver_profile; 1080 if (receiver_can_be_null) { 1081 Label not_null; 1082 testptr(receiver, receiver); 1083 jccb(Assembler::notZero, not_null); 1084 // We are making a call. Increment the count for null receiver. 1085 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1086 jmp(skip_receiver_profile); 1087 bind(not_null); 1088 } 1089 1090 // Record the receiver type. 1091 record_klass_in_profile(receiver, mdp, reg2, true); 1092 bind(skip_receiver_profile); 1093 1094 // The method data pointer needs to be updated to reflect the new target. 1095 update_mdp_by_constant(mdp, 1096 in_bytes(VirtualCallData:: 1097 virtual_call_data_size())); 1098 bind(profile_continue); 1099 } 1100 } 1101 1102 1103 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1104 Register receiver, Register mdp, 1105 Register reg2, int start_row, 1106 Label& done, bool is_virtual_call) { 1107 if (TypeProfileWidth == 0) { 1108 if (is_virtual_call) { 1109 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1110 } 1111 return; 1112 } 1113 1114 int last_row = VirtualCallData::row_limit() - 1; 1115 assert(start_row <= last_row, "must be work left to do"); 1116 // Test this row for both the receiver and for null. 1117 // Take any of three different outcomes: 1118 // 1. found receiver => increment count and goto done 1119 // 2. found null => keep looking for case 1, maybe allocate this cell 1120 // 3. found something else => keep looking for cases 1 and 2 1121 // Case 3 is handled by a recursive call. 1122 for (int row = start_row; row <= last_row; row++) { 1123 Label next_test; 1124 bool test_for_null_also = (row == start_row); 1125 1126 // See if the receiver is receiver[n]. 1127 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); 1128 test_mdp_data_at(mdp, recvr_offset, receiver, 1129 (test_for_null_also ? reg2 : noreg), 1130 next_test); 1131 // (Reg2 now contains the receiver from the CallData.) 1132 1133 // The receiver is receiver[n]. Increment count[n]. 1134 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); 1135 increment_mdp_data_at(mdp, count_offset); 1136 jmp(done); 1137 bind(next_test); 1138 1139 if (row == start_row) { 1140 Label found_null; 1141 // Failed the equality check on receiver[n]... Test for null. 1142 testptr(reg2, reg2); 1143 if (start_row == last_row) { 1144 // The only thing left to do is handle the null case. 1145 if (is_virtual_call) { 1146 jccb(Assembler::zero, found_null); 1147 // Receiver did not match any saved receiver and there is no empty row for it. 1148 // Increment total counter to indicate polymorphic case. 1149 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1150 jmp(done); 1151 bind(found_null); 1152 } else { 1153 jcc(Assembler::notZero, done); 1154 } 1155 break; 1156 } 1157 // Since null is rare, make it be the branch-taken case. 1158 jcc(Assembler::zero, found_null); 1159 1160 // Put all the "Case 3" tests here. 1161 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); 1162 1163 // Found a null. Keep searching for a matching receiver, 1164 // but remember that this is an empty (unused) slot. 1165 bind(found_null); 1166 } 1167 } 1168 1169 // In the fall-through case, we found no matching receiver, but we 1170 // observed the receiver[start_row] is NULL. 1171 1172 // Fill in the receiver field and increment the count. 1173 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); 1174 set_mdp_data_at(mdp, recvr_offset, receiver); 1175 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); 1176 movptr(reg2, (intptr_t)DataLayout::counter_increment); 1177 set_mdp_data_at(mdp, count_offset, reg2); 1178 if (start_row > 0) { 1179 jmp(done); 1180 } 1181 } 1182 1183 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, 1184 Register mdp, Register reg2, 1185 bool is_virtual_call) { 1186 assert(ProfileInterpreter, "must be profiling"); 1187 Label done; 1188 1189 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); 1190 1191 bind (done); 1192 } 1193 1194 void InterpreterMacroAssembler::profile_ret(Register return_bci, Register mdp) { 1195 if (ProfileInterpreter) { 1196 Label profile_continue; 1197 uint row; 1198 1199 // If no method data exists, go to profile_continue. 1200 test_method_data_pointer(mdp, profile_continue); 1201 1202 // Update the total ret count. 1203 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); 1204 1205 for (row = 0; row < RetData::row_limit(); row++) { 1206 Label next_test; 1207 1208 // See if return_bci is equal to bci[n]: 1209 test_mdp_data_at(mdp, in_bytes(RetData::bci_offset(row)), return_bci, 1210 noreg, next_test); 1211 1212 // return_bci is equal to bci[n]. Increment the count. 1213 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); 1214 1215 // The method data pointer needs to be updated to reflect the new target. 1216 update_mdp_by_offset(mdp, in_bytes(RetData::bci_displacement_offset(row))); 1217 jmp(profile_continue); 1218 bind(next_test); 1219 } 1220 1221 update_mdp_for_ret(return_bci); 1222 1223 bind (profile_continue); 1224 } 1225 } 1226 1227 1228 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { 1229 if (ProfileInterpreter) { 1230 Label profile_continue; 1231 1232 // If no method data exists, go to profile_continue. 1233 test_method_data_pointer(mdp, profile_continue); 1234 1235 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); 1236 1237 // The method data pointer needs to be updated. 1238 int mdp_delta = in_bytes(BitData::bit_data_size()); 1239 if (TypeProfileCasts) { 1240 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1241 } 1242 update_mdp_by_constant(mdp, mdp_delta); 1243 1244 bind (profile_continue); 1245 } 1246 } 1247 1248 1249 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { 1250 if (ProfileInterpreter && TypeProfileCasts) { 1251 Label profile_continue; 1252 1253 // If no method data exists, go to profile_continue. 1254 test_method_data_pointer(mdp, profile_continue); 1255 1256 int count_offset = in_bytes(CounterData::count_offset()); 1257 // Back up the address, since we have already bumped the mdp. 1258 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1259 1260 // *Decrement* the counter. We expect to see zero or small negatives. 1261 increment_mdp_data_at(mdp, count_offset, true); 1262 1263 bind (profile_continue); 1264 } 1265 } 1266 1267 1268 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) 1269 { 1270 if (ProfileInterpreter) { 1271 Label profile_continue; 1272 1273 // If no method data exists, go to profile_continue. 1274 test_method_data_pointer(mdp, profile_continue); 1275 1276 // The method data pointer needs to be updated. 1277 int mdp_delta = in_bytes(BitData::bit_data_size()); 1278 if (TypeProfileCasts) { 1279 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1280 1281 // Record the object type. 1282 record_klass_in_profile(klass, mdp, reg2, false); 1283 assert(reg2 == rdi, "we know how to fix this blown reg"); 1284 restore_locals(); // Restore EDI 1285 } 1286 update_mdp_by_constant(mdp, mdp_delta); 1287 1288 bind(profile_continue); 1289 } 1290 } 1291 1292 1293 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { 1294 if (ProfileInterpreter) { 1295 Label profile_continue; 1296 1297 // If no method data exists, go to profile_continue. 1298 test_method_data_pointer(mdp, profile_continue); 1299 1300 // Update the default case count 1301 increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset())); 1302 1303 // The method data pointer needs to be updated. 1304 update_mdp_by_offset(mdp, in_bytes(MultiBranchData::default_displacement_offset())); 1305 1306 bind (profile_continue); 1307 } 1308 } 1309 1310 1311 void InterpreterMacroAssembler::profile_switch_case(Register index, Register mdp, Register reg2) { 1312 if (ProfileInterpreter) { 1313 Label profile_continue; 1314 1315 // If no method data exists, go to profile_continue. 1316 test_method_data_pointer(mdp, profile_continue); 1317 1318 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes() 1319 movptr(reg2, (intptr_t)in_bytes(MultiBranchData::per_case_size())); 1320 // index is positive and so should have correct value if this code were 1321 // used on 64bits 1322 imulptr(index, reg2); 1323 addptr(index, in_bytes(MultiBranchData::case_array_offset())); 1324 1325 // Update the case count 1326 increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset())); 1327 1328 // The method data pointer needs to be updated. 1329 update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData::relative_displacement_offset())); 1330 1331 bind (profile_continue); 1332 } 1333 } 1334 1335 #endif // !CC_INTERP 1336 1337 1338 1339 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 1340 if (state == atos) MacroAssembler::verify_oop(reg); 1341 } 1342 1343 1344 #ifndef CC_INTERP 1345 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 1346 if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth); 1347 } 1348 1349 #endif /* CC_INTERP */ 1350 1351 1352 void InterpreterMacroAssembler::notify_method_entry() { 1353 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1354 // track stack depth. If it is possible to enter interp_only_mode we add 1355 // the code to check if the event should be sent. 1356 if (JvmtiExport::can_post_interpreter_events()) { 1357 Label L; 1358 get_thread(rcx); 1359 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset())); 1360 testl(rcx,rcx); 1361 jcc(Assembler::zero, L); 1362 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry)); 1363 bind(L); 1364 } 1365 1366 { 1367 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0); 1368 get_thread(rcx); 1369 get_method(rbx); 1370 call_VM_leaf( 1371 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), rcx, rbx); 1372 } 1373 1374 // RedefineClasses() tracing support for obsolete method entry 1375 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { 1376 get_thread(rcx); 1377 get_method(rbx); 1378 call_VM_leaf( 1379 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), 1380 rcx, rbx); 1381 } 1382 } 1383 1384 1385 void InterpreterMacroAssembler::notify_method_exit( 1386 TosState state, NotifyMethodExitMode mode) { 1387 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to 1388 // track stack depth. If it is possible to enter interp_only_mode we add 1389 // the code to check if the event should be sent. 1390 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 1391 Label L; 1392 // Note: frame::interpreter_frame_result has a dependency on how the 1393 // method result is saved across the call to post_method_exit. If this 1394 // is changed then the interpreter_frame_result implementation will 1395 // need to be updated too. 1396 1397 // For c++ interpreter the result is always stored at a known location in the frame 1398 // template interpreter will leave it on the top of the stack. 1399 NOT_CC_INTERP(push(state);) 1400 get_thread(rcx); 1401 movl(rcx, Address(rcx, JavaThread::interp_only_mode_offset())); 1402 testl(rcx,rcx); 1403 jcc(Assembler::zero, L); 1404 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); 1405 bind(L); 1406 NOT_CC_INTERP(pop(state);) 1407 } 1408 1409 { 1410 SkipIfEqual skip_if(this, &DTraceMethodProbes, 0); 1411 NOT_CC_INTERP(push(state)); 1412 get_thread(rbx); 1413 get_method(rcx); 1414 call_VM_leaf( 1415 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), 1416 rbx, rcx); 1417 NOT_CC_INTERP(pop(state)); 1418 } 1419 } 1420 1421 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. 1422 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, 1423 int increment, int mask, 1424 Register scratch, bool preloaded, 1425 Condition cond, Label* where) { 1426 if (!preloaded) { 1427 movl(scratch, counter_addr); 1428 } 1429 incrementl(scratch, increment); 1430 movl(counter_addr, scratch); 1431 andl(scratch, mask); 1432 jcc(cond, *where); 1433 }