1 /* 2 * Copyright (c) 2003, 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 "asm/assembler.hpp" 27 #include "interpreter/bytecodeHistogram.hpp" 28 #include "interpreter/interpreter.hpp" 29 #include "interpreter/interpreterGenerator.hpp" 30 #include "interpreter/interpreterRuntime.hpp" 31 #include "interpreter/templateTable.hpp" 32 #include "oops/arrayOop.hpp" 33 #include "oops/methodDataOop.hpp" 34 #include "oops/methodOop.hpp" 35 #include "oops/oop.inline.hpp" 36 #include "prims/jvmtiExport.hpp" 37 #include "prims/jvmtiThreadState.hpp" 38 #include "runtime/arguments.hpp" 39 #include "runtime/deoptimization.hpp" 40 #include "runtime/frame.inline.hpp" 41 #include "runtime/sharedRuntime.hpp" 42 #include "runtime/stubRoutines.hpp" 43 #include "runtime/synchronizer.hpp" 44 #include "runtime/timer.hpp" 45 #include "runtime/vframeArray.hpp" 46 #include "utilities/debug.hpp" 47 48 #define __ _masm-> 49 50 #ifndef CC_INTERP 51 52 const int method_offset = frame::interpreter_frame_method_offset * wordSize; 53 const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize; 54 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; 55 56 //----------------------------------------------------------------------------- 57 58 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 59 address entry = __ pc(); 60 61 #ifdef ASSERT 62 { 63 Label L; 64 __ lea(rax, Address(rbp, 65 frame::interpreter_frame_monitor_block_top_offset * 66 wordSize)); 67 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack 68 // grows negative) 69 __ jcc(Assembler::aboveEqual, L); // check if frame is complete 70 __ stop ("interpreter frame not set up"); 71 __ bind(L); 72 } 73 #endif // ASSERT 74 // Restore bcp under the assumption that the current frame is still 75 // interpreted 76 __ restore_bcp(); 77 78 // expression stack must be empty before entering the VM if an 79 // exception happened 80 __ empty_expression_stack(); 81 // throw exception 82 __ call_VM(noreg, 83 CAST_FROM_FN_PTR(address, 84 InterpreterRuntime::throw_StackOverflowError)); 85 return entry; 86 } 87 88 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler( 89 const char* name) { 90 address entry = __ pc(); 91 // expression stack must be empty before entering the VM if an 92 // exception happened 93 __ empty_expression_stack(); 94 // setup parameters 95 // ??? convention: expect aberrant index in register ebx 96 __ lea(c_rarg1, ExternalAddress((address)name)); 97 __ call_VM(noreg, 98 CAST_FROM_FN_PTR(address, 99 InterpreterRuntime:: 100 throw_ArrayIndexOutOfBoundsException), 101 c_rarg1, rbx); 102 return entry; 103 } 104 105 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 106 address entry = __ pc(); 107 108 // object is at TOS 109 __ pop(c_rarg1); 110 111 // expression stack must be empty before entering the VM if an 112 // exception happened 113 __ empty_expression_stack(); 114 115 __ call_VM(noreg, 116 CAST_FROM_FN_PTR(address, 117 InterpreterRuntime:: 118 throw_ClassCastException), 119 c_rarg1); 120 return entry; 121 } 122 123 address TemplateInterpreterGenerator::generate_exception_handler_common( 124 const char* name, const char* message, bool pass_oop) { 125 assert(!pass_oop || message == NULL, "either oop or message but not both"); 126 address entry = __ pc(); 127 if (pass_oop) { 128 // object is at TOS 129 __ pop(c_rarg2); 130 } 131 // expression stack must be empty before entering the VM if an 132 // exception happened 133 __ empty_expression_stack(); 134 // setup parameters 135 __ lea(c_rarg1, ExternalAddress((address)name)); 136 if (pass_oop) { 137 __ call_VM(rax, CAST_FROM_FN_PTR(address, 138 InterpreterRuntime:: 139 create_klass_exception), 140 c_rarg1, c_rarg2); 141 } else { 142 // kind of lame ExternalAddress can't take NULL because 143 // external_word_Relocation will assert. 144 if (message != NULL) { 145 __ lea(c_rarg2, ExternalAddress((address)message)); 146 } else { 147 __ movptr(c_rarg2, NULL_WORD); 148 } 149 __ call_VM(rax, 150 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 151 c_rarg1, c_rarg2); 152 } 153 // throw exception 154 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 155 return entry; 156 } 157 158 159 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { 160 address entry = __ pc(); 161 // NULL last_sp until next java call 162 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 163 __ dispatch_next(state); 164 return entry; 165 } 166 167 168 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) { 169 address entry = __ pc(); 170 171 // Restore stack bottom in case i2c adjusted stack 172 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 173 // and NULL it as marker that esp is now tos until next java call 174 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 175 176 __ restore_bcp(); 177 __ restore_locals(); 178 179 Label L_got_cache, L_giant_index; 180 if (EnableInvokeDynamic) { 181 __ cmpb(Address(r13, 0), Bytecodes::_invokedynamic); 182 __ jcc(Assembler::equal, L_giant_index); 183 } 184 __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u2)); 185 __ bind(L_got_cache); 186 __ movl(rbx, Address(rbx, rcx, 187 Address::times_ptr, 188 in_bytes(constantPoolCacheOopDesc::base_offset()) + 189 3 * wordSize)); 190 __ andl(rbx, 0xFF); 191 __ lea(rsp, Address(rsp, rbx, Address::times_8)); 192 __ dispatch_next(state, step); 193 194 // out of the main line of code... 195 if (EnableInvokeDynamic) { 196 __ bind(L_giant_index); 197 __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u4)); 198 __ jmp(L_got_cache); 199 } 200 201 return entry; 202 } 203 204 205 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, 206 int step) { 207 address entry = __ pc(); 208 // NULL last_sp until next java call 209 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 210 __ restore_bcp(); 211 __ restore_locals(); 212 // handle exceptions 213 { 214 Label L; 215 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 216 __ jcc(Assembler::zero, L); 217 __ call_VM(noreg, 218 CAST_FROM_FN_PTR(address, 219 InterpreterRuntime::throw_pending_exception)); 220 __ should_not_reach_here(); 221 __ bind(L); 222 } 223 __ dispatch_next(state, step); 224 return entry; 225 } 226 227 int AbstractInterpreter::BasicType_as_index(BasicType type) { 228 int i = 0; 229 switch (type) { 230 case T_BOOLEAN: i = 0; break; 231 case T_CHAR : i = 1; break; 232 case T_BYTE : i = 2; break; 233 case T_SHORT : i = 3; break; 234 case T_INT : i = 4; break; 235 case T_LONG : i = 5; break; 236 case T_VOID : i = 6; break; 237 case T_FLOAT : i = 7; break; 238 case T_DOUBLE : i = 8; break; 239 case T_OBJECT : i = 9; break; 240 case T_ARRAY : i = 9; break; 241 default : ShouldNotReachHere(); 242 } 243 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, 244 "index out of bounds"); 245 return i; 246 } 247 248 249 address TemplateInterpreterGenerator::generate_result_handler_for( 250 BasicType type) { 251 address entry = __ pc(); 252 switch (type) { 253 case T_BOOLEAN: __ c2bool(rax); break; 254 case T_CHAR : __ movzwl(rax, rax); break; 255 case T_BYTE : __ sign_extend_byte(rax); break; 256 case T_SHORT : __ sign_extend_short(rax); break; 257 case T_INT : /* nothing to do */ break; 258 case T_LONG : /* nothing to do */ break; 259 case T_VOID : /* nothing to do */ break; 260 case T_FLOAT : /* nothing to do */ break; 261 case T_DOUBLE : /* nothing to do */ break; 262 case T_OBJECT : 263 // retrieve result from frame 264 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); 265 // and verify it 266 __ verify_oop(rax); 267 break; 268 default : ShouldNotReachHere(); 269 } 270 __ ret(0); // return from result handler 271 return entry; 272 } 273 274 address TemplateInterpreterGenerator::generate_safept_entry_for( 275 TosState state, 276 address runtime_entry) { 277 address entry = __ pc(); 278 __ push(state); 279 __ call_VM(noreg, runtime_entry); 280 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 281 return entry; 282 } 283 284 285 286 // Helpers for commoning out cases in the various type of method entries. 287 // 288 289 290 // increment invocation count & check for overflow 291 // 292 // Note: checking for negative value instead of overflow 293 // so we have a 'sticky' overflow test 294 // 295 // rbx: method 296 // ecx: invocation counter 297 // 298 void InterpreterGenerator::generate_counter_incr( 299 Label* overflow, 300 Label* profile_method, 301 Label* profile_method_continue) { 302 const Address invocation_counter(rbx, in_bytes(methodOopDesc::invocation_counter_offset()) + 303 in_bytes(InvocationCounter::counter_offset())); 304 // Note: In tiered we increment either counters in methodOop or in MDO depending if we're profiling or not. 305 if (TieredCompilation) { 306 int increment = InvocationCounter::count_increment; 307 int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift; 308 Label no_mdo, done; 309 if (ProfileInterpreter) { 310 // Are we profiling? 311 __ movptr(rax, Address(rbx, methodOopDesc::method_data_offset())); 312 __ testptr(rax, rax); 313 __ jccb(Assembler::zero, no_mdo); 314 // Increment counter in the MDO 315 const Address mdo_invocation_counter(rax, in_bytes(methodDataOopDesc::invocation_counter_offset()) + 316 in_bytes(InvocationCounter::counter_offset())); 317 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); 318 __ jmpb(done); 319 } 320 __ bind(no_mdo); 321 // Increment counter in methodOop (we don't need to load it, it's in ecx). 322 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, true, Assembler::zero, overflow); 323 __ bind(done); 324 } else { 325 const Address backedge_counter(rbx, 326 methodOopDesc::backedge_counter_offset() + 327 InvocationCounter::counter_offset()); 328 329 if (ProfileInterpreter) { // %%% Merge this into methodDataOop 330 __ incrementl(Address(rbx, 331 methodOopDesc::interpreter_invocation_counter_offset())); 332 } 333 // Update standard invocation counters 334 __ movl(rax, backedge_counter); // load backedge counter 335 336 __ incrementl(rcx, InvocationCounter::count_increment); 337 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits 338 339 __ movl(invocation_counter, rcx); // save invocation count 340 __ addl(rcx, rax); // add both counters 341 342 // profile_method is non-null only for interpreted method so 343 // profile_method != NULL == !native_call 344 345 if (ProfileInterpreter && profile_method != NULL) { 346 // Test to see if we should create a method data oop 347 __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit)); 348 __ jcc(Assembler::less, *profile_method_continue); 349 350 // if no method data exists, go to profile_method 351 __ test_method_data_pointer(rax, *profile_method); 352 } 353 354 __ cmp32(rcx, ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit)); 355 __ jcc(Assembler::aboveEqual, *overflow); 356 } 357 } 358 359 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { 360 361 // Asm interpreter on entry 362 // r14 - locals 363 // r13 - bcp 364 // rbx - method 365 // edx - cpool --- DOES NOT APPEAR TO BE TRUE 366 // rbp - interpreter frame 367 368 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 369 // Everything as it was on entry 370 // rdx is not restored. Doesn't appear to really be set. 371 372 const Address size_of_parameters(rbx, 373 methodOopDesc::size_of_parameters_offset()); 374 375 // InterpreterRuntime::frequency_counter_overflow takes two 376 // arguments, the first (thread) is passed by call_VM, the second 377 // indicates if the counter overflow occurs at a backwards branch 378 // (NULL bcp). We pass zero for it. The call returns the address 379 // of the verified entry point for the method or NULL if the 380 // compilation did not complete (either went background or bailed 381 // out). 382 __ movl(c_rarg1, 0); 383 __ call_VM(noreg, 384 CAST_FROM_FN_PTR(address, 385 InterpreterRuntime::frequency_counter_overflow), 386 c_rarg1); 387 388 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop 389 // Preserve invariant that r13/r14 contain bcp/locals of sender frame 390 // and jump to the interpreted entry. 391 __ jmp(*do_continue, relocInfo::none); 392 } 393 394 // See if we've got enough room on the stack for locals plus overhead. 395 // The expression stack grows down incrementally, so the normal guard 396 // page mechanism will work for that. 397 // 398 // NOTE: Since the additional locals are also always pushed (wasn't 399 // obvious in generate_method_entry) so the guard should work for them 400 // too. 401 // 402 // Args: 403 // rdx: number of additional locals this frame needs (what we must check) 404 // rbx: methodOop 405 // 406 // Kills: 407 // rax 408 void InterpreterGenerator::generate_stack_overflow_check(void) { 409 410 // monitor entry size: see picture of stack set 411 // (generate_method_entry) and frame_amd64.hpp 412 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 413 414 // total overhead size: entry_size + (saved rbp through expr stack 415 // bottom). be sure to change this if you add/subtract anything 416 // to/from the overhead area 417 const int overhead_size = 418 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; 419 420 const int page_size = os::vm_page_size(); 421 422 Label after_frame_check; 423 424 // see if the frame is greater than one page in size. If so, 425 // then we need to verify there is enough stack space remaining 426 // for the additional locals. 427 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize); 428 __ jcc(Assembler::belowEqual, after_frame_check); 429 430 // compute rsp as if this were going to be the last frame on 431 // the stack before the red zone 432 433 const Address stack_base(r15_thread, Thread::stack_base_offset()); 434 const Address stack_size(r15_thread, Thread::stack_size_offset()); 435 436 // locals + overhead, in bytes 437 __ mov(rax, rdx); 438 __ shlptr(rax, Interpreter::logStackElementSize); // 2 slots per parameter. 439 __ addptr(rax, overhead_size); 440 441 #ifdef ASSERT 442 Label stack_base_okay, stack_size_okay; 443 // verify that thread stack base is non-zero 444 __ cmpptr(stack_base, (int32_t)NULL_WORD); 445 __ jcc(Assembler::notEqual, stack_base_okay); 446 __ stop("stack base is zero"); 447 __ bind(stack_base_okay); 448 // verify that thread stack size is non-zero 449 __ cmpptr(stack_size, 0); 450 __ jcc(Assembler::notEqual, stack_size_okay); 451 __ stop("stack size is zero"); 452 __ bind(stack_size_okay); 453 #endif 454 455 // Add stack base to locals and subtract stack size 456 __ addptr(rax, stack_base); 457 __ subptr(rax, stack_size); 458 459 // Use the maximum number of pages we might bang. 460 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages : 461 (StackRedPages+StackYellowPages); 462 463 // add in the red and yellow zone sizes 464 __ addptr(rax, max_pages * page_size); 465 466 // check against the current stack bottom 467 __ cmpptr(rsp, rax); 468 __ jcc(Assembler::above, after_frame_check); 469 470 // Restore sender's sp as SP. This is necessary if the sender's 471 // frame is an extended compiled frame (see gen_c2i_adapter()) 472 // and safer anyway in case of JSR292 adaptations. 473 474 __ pop(rax); // return address must be moved if SP is changed 475 __ mov(rsp, r13); 476 __ push(rax); 477 478 // Note: the restored frame is not necessarily interpreted. 479 // Use the shared runtime version of the StackOverflowError. 480 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 481 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry())); 482 483 // all done with frame size check 484 __ bind(after_frame_check); 485 } 486 487 // Allocate monitor and lock method (asm interpreter) 488 // 489 // Args: 490 // rbx: methodOop 491 // r14: locals 492 // 493 // Kills: 494 // rax 495 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) 496 // rscratch1, rscratch2 (scratch regs) 497 void InterpreterGenerator::lock_method(void) { 498 // synchronize method 499 const Address access_flags(rbx, methodOopDesc::access_flags_offset()); 500 const Address monitor_block_top( 501 rbp, 502 frame::interpreter_frame_monitor_block_top_offset * wordSize); 503 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 504 505 #ifdef ASSERT 506 { 507 Label L; 508 __ movl(rax, access_flags); 509 __ testl(rax, JVM_ACC_SYNCHRONIZED); 510 __ jcc(Assembler::notZero, L); 511 __ stop("method doesn't need synchronization"); 512 __ bind(L); 513 } 514 #endif // ASSERT 515 516 // get synchronization object 517 { 518 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 519 Label done; 520 __ movl(rax, access_flags); 521 __ testl(rax, JVM_ACC_STATIC); 522 // get receiver (assume this is frequent case) 523 __ movptr(rax, Address(r14, Interpreter::local_offset_in_bytes(0))); 524 __ jcc(Assembler::zero, done); 525 __ movptr(rax, Address(rbx, methodOopDesc::const_offset())); 526 __ movptr(rax, Address(rax, constMethodOopDesc::constants_offset())); 527 __ movptr(rax, Address(rax, 528 constantPoolOopDesc::pool_holder_offset_in_bytes())); 529 __ movptr(rax, Address(rax, mirror_offset)); 530 531 #ifdef ASSERT 532 { 533 Label L; 534 __ testptr(rax, rax); 535 __ jcc(Assembler::notZero, L); 536 __ stop("synchronization object is NULL"); 537 __ bind(L); 538 } 539 #endif // ASSERT 540 541 __ bind(done); 542 } 543 544 // add space for monitor & lock 545 __ subptr(rsp, entry_size); // add space for a monitor entry 546 __ movptr(monitor_block_top, rsp); // set new monitor block top 547 // store object 548 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); 549 __ movptr(c_rarg1, rsp); // object address 550 __ lock_object(c_rarg1); 551 } 552 553 // Generate a fixed interpreter frame. This is identical setup for 554 // interpreted methods and for native methods hence the shared code. 555 // 556 // Args: 557 // rax: return address 558 // rbx: methodOop 559 // r14: pointer to locals 560 // r13: sender sp 561 // rdx: cp cache 562 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 563 // initialize fixed part of activation frame 564 __ push(rax); // save return address 565 __ enter(); // save old & set new rbp 566 __ push(r13); // set sender sp 567 __ push((int)NULL_WORD); // leave last_sp as null 568 __ movptr(r13, Address(rbx, methodOopDesc::const_offset())); // get constMethodOop 569 __ lea(r13, Address(r13, constMethodOopDesc::codes_offset())); // get codebase 570 __ push(rbx); // save methodOop 571 if (ProfileInterpreter) { 572 Label method_data_continue; 573 __ movptr(rdx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); 574 __ testptr(rdx, rdx); 575 __ jcc(Assembler::zero, method_data_continue); 576 __ addptr(rdx, in_bytes(methodDataOopDesc::data_offset())); 577 __ bind(method_data_continue); 578 __ push(rdx); // set the mdp (method data pointer) 579 } else { 580 __ push(0); 581 } 582 583 __ movptr(rdx, Address(rbx, methodOopDesc::const_offset())); 584 __ movptr(rdx, Address(rdx, constMethodOopDesc::constants_offset())); 585 __ movptr(rdx, Address(rdx, constantPoolOopDesc::cache_offset_in_bytes())); 586 __ push(rdx); // set constant pool cache 587 __ push(r14); // set locals pointer 588 if (native_call) { 589 __ push(0); // no bcp 590 } else { 591 __ push(r13); // set bcp 592 } 593 __ push(0); // reserve word for pointer to expression stack bottom 594 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom 595 } 596 597 // End of helpers 598 599 // Various method entries 600 //------------------------------------------------------------------------------------------------------------------------ 601 // 602 // 603 604 // Call an accessor method (assuming it is resolved, otherwise drop 605 // into vanilla (slow path) entry 606 address InterpreterGenerator::generate_accessor_entry(void) { 607 // rbx: methodOop 608 609 // r13: senderSP must preserver for slow path, set SP to it on fast path 610 611 address entry_point = __ pc(); 612 Label xreturn_path; 613 614 // do fastpath for resolved accessor methods 615 if (UseFastAccessorMethods) { 616 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites 617 // thereof; parameter size = 1 618 // Note: We can only use this code if the getfield has been resolved 619 // and if we don't have a null-pointer exception => check for 620 // these conditions first and use slow path if necessary. 621 Label slow_path; 622 // If we need a safepoint check, generate full interpreter entry. 623 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 624 SafepointSynchronize::_not_synchronized); 625 626 __ jcc(Assembler::notEqual, slow_path); 627 // rbx: method 628 __ movptr(rax, Address(rsp, wordSize)); 629 630 // check if local 0 != NULL and read field 631 __ testptr(rax, rax); 632 __ jcc(Assembler::zero, slow_path); 633 634 // read first instruction word and extract bytecode @ 1 and index @ 2 635 __ movptr(rdx, Address(rbx, methodOopDesc::const_offset())); 636 __ movptr(rdi, Address(rdx, constMethodOopDesc::constants_offset())); 637 __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset())); 638 // Shift codes right to get the index on the right. 639 // The bytecode fetched looks like <index><0xb4><0x2a> 640 __ shrl(rdx, 2 * BitsPerByte); 641 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size()))); 642 __ movptr(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes())); 643 644 // rax: local 0 645 // rbx: method 646 // rdx: constant pool cache index 647 // rdi: constant pool cache 648 649 // check if getfield has been resolved and read constant pool cache entry 650 // check the validity of the cache entry by testing whether _indices field 651 // contains Bytecode::_getfield in b1 byte. 652 assert(in_words(ConstantPoolCacheEntry::size()) == 4, 653 "adjust shift below"); 654 __ movl(rcx, 655 Address(rdi, 656 rdx, 657 Address::times_8, 658 constantPoolCacheOopDesc::base_offset() + 659 ConstantPoolCacheEntry::indices_offset())); 660 __ shrl(rcx, 2 * BitsPerByte); 661 __ andl(rcx, 0xFF); 662 __ cmpl(rcx, Bytecodes::_getfield); 663 __ jcc(Assembler::notEqual, slow_path); 664 665 // Note: constant pool entry is not valid before bytecode is resolved 666 __ movptr(rcx, 667 Address(rdi, 668 rdx, 669 Address::times_8, 670 constantPoolCacheOopDesc::base_offset() + 671 ConstantPoolCacheEntry::f2_offset())); 672 // edx: flags 673 __ movl(rdx, 674 Address(rdi, 675 rdx, 676 Address::times_8, 677 constantPoolCacheOopDesc::base_offset() + 678 ConstantPoolCacheEntry::flags_offset())); 679 680 Label notObj, notInt, notByte, notShort; 681 const Address field_address(rax, rcx, Address::times_1); 682 683 // Need to differentiate between igetfield, agetfield, bgetfield etc. 684 // because they are different sizes. 685 // Use the type from the constant pool cache 686 __ shrl(rdx, ConstantPoolCacheEntry::tosBits); 687 // Make sure we don't need to mask edx for tosBits after the above shift 688 ConstantPoolCacheEntry::verify_tosBits(); 689 690 __ cmpl(rdx, atos); 691 __ jcc(Assembler::notEqual, notObj); 692 // atos 693 __ load_heap_oop(rax, field_address); 694 __ jmp(xreturn_path); 695 696 __ bind(notObj); 697 __ cmpl(rdx, itos); 698 __ jcc(Assembler::notEqual, notInt); 699 // itos 700 __ movl(rax, field_address); 701 __ jmp(xreturn_path); 702 703 __ bind(notInt); 704 __ cmpl(rdx, btos); 705 __ jcc(Assembler::notEqual, notByte); 706 // btos 707 __ load_signed_byte(rax, field_address); 708 __ jmp(xreturn_path); 709 710 __ bind(notByte); 711 __ cmpl(rdx, stos); 712 __ jcc(Assembler::notEqual, notShort); 713 // stos 714 __ load_signed_short(rax, field_address); 715 __ jmp(xreturn_path); 716 717 __ bind(notShort); 718 #ifdef ASSERT 719 Label okay; 720 __ cmpl(rdx, ctos); 721 __ jcc(Assembler::equal, okay); 722 __ stop("what type is this?"); 723 __ bind(okay); 724 #endif 725 // ctos 726 __ load_unsigned_short(rax, field_address); 727 728 __ bind(xreturn_path); 729 730 // _ireturn/_areturn 731 __ pop(rdi); 732 __ mov(rsp, r13); 733 __ jmp(rdi); 734 __ ret(0); 735 736 // generate a vanilla interpreter entry as the slow path 737 __ bind(slow_path); 738 (void) generate_normal_entry(false); 739 } else { 740 (void) generate_normal_entry(false); 741 } 742 743 return entry_point; 744 } 745 746 // Method entry for java.lang.ref.Reference.get. 747 address InterpreterGenerator::generate_Reference_get_entry(void) { 748 #ifndef SERIALGC 749 // Code: _aload_0, _getfield, _areturn 750 // parameter size = 1 751 // 752 // The code that gets generated by this routine is split into 2 parts: 753 // 1. The "intrinsified" code for G1 (or any SATB based GC), 754 // 2. The slow path - which is an expansion of the regular method entry. 755 // 756 // Notes:- 757 // * In the G1 code we do not check whether we need to block for 758 // a safepoint. If G1 is enabled then we must execute the specialized 759 // code for Reference.get (except when the Reference object is null) 760 // so that we can log the value in the referent field with an SATB 761 // update buffer. 762 // If the code for the getfield template is modified so that the 763 // G1 pre-barrier code is executed when the current method is 764 // Reference.get() then going through the normal method entry 765 // will be fine. 766 // * The G1 code can, however, check the receiver object (the instance 767 // of java.lang.Reference) and jump to the slow path if null. If the 768 // Reference object is null then we obviously cannot fetch the referent 769 // and so we don't need to call the G1 pre-barrier. Thus we can use the 770 // regular method entry code to generate the NPE. 771 // 772 // This code is based on generate_accessor_enty. 773 // 774 // rbx: methodOop 775 776 // r13: senderSP must preserve for slow path, set SP to it on fast path 777 778 address entry = __ pc(); 779 780 const int referent_offset = java_lang_ref_Reference::referent_offset; 781 guarantee(referent_offset > 0, "referent offset not initialized"); 782 783 if (UseG1GC) { 784 Label slow_path; 785 // rbx: method 786 787 // Check if local 0 != NULL 788 // If the receiver is null then it is OK to jump to the slow path. 789 __ movptr(rax, Address(rsp, wordSize)); 790 791 __ testptr(rax, rax); 792 __ jcc(Assembler::zero, slow_path); 793 794 // rax: local 0 795 // rbx: method (but can be used as scratch now) 796 // rdx: scratch 797 // rdi: scratch 798 799 // Generate the G1 pre-barrier code to log the value of 800 // the referent field in an SATB buffer. 801 802 // Load the value of the referent field. 803 const Address field_address(rax, referent_offset); 804 __ load_heap_oop(rax, field_address); 805 806 // Generate the G1 pre-barrier code to log the value of 807 // the referent field in an SATB buffer. 808 __ g1_write_barrier_pre(noreg /* obj */, 809 rax /* pre_val */, 810 r15_thread /* thread */, 811 rbx /* tmp */, 812 true /* tosca_live */, 813 true /* expand_call */); 814 815 // _areturn 816 __ pop(rdi); // get return address 817 __ mov(rsp, r13); // set sp to sender sp 818 __ jmp(rdi); 819 __ ret(0); 820 821 // generate a vanilla interpreter entry as the slow path 822 __ bind(slow_path); 823 (void) generate_normal_entry(false); 824 825 return entry; 826 } 827 #endif // SERIALGC 828 829 // If G1 is not enabled then attempt to go through the accessor entry point 830 // Reference.get is an accessor 831 return generate_accessor_entry(); 832 } 833 834 835 // Interpreter stub for calling a native method. (asm interpreter) 836 // This sets up a somewhat different looking stack for calling the 837 // native method than the typical interpreter frame setup. 838 address InterpreterGenerator::generate_native_entry(bool synchronized) { 839 // determine code generation flags 840 bool inc_counter = UseCompiler || CountCompiledCalls; 841 842 // rbx: methodOop 843 // r13: sender sp 844 845 address entry_point = __ pc(); 846 847 const Address size_of_parameters(rbx, methodOopDesc:: 848 size_of_parameters_offset()); 849 const Address invocation_counter(rbx, methodOopDesc:: 850 invocation_counter_offset() + 851 InvocationCounter::counter_offset()); 852 const Address access_flags (rbx, methodOopDesc::access_flags_offset()); 853 854 // get parameter size (always needed) 855 __ load_unsigned_short(rcx, size_of_parameters); 856 857 // native calls don't need the stack size check since they have no 858 // expression stack and the arguments are already on the stack and 859 // we only add a handful of words to the stack 860 861 // rbx: methodOop 862 // rcx: size of parameters 863 // r13: sender sp 864 __ pop(rax); // get return address 865 866 // for natives the size of locals is zero 867 868 // compute beginning of parameters (r14) 869 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize)); 870 871 // add 2 zero-initialized slots for native calls 872 // initialize result_handler slot 873 __ push((int) NULL_WORD); 874 // slot for oop temp 875 // (static native method holder mirror/jni oop result) 876 __ push((int) NULL_WORD); 877 878 if (inc_counter) { 879 __ movl(rcx, invocation_counter); // (pre-)fetch invocation count 880 } 881 882 // initialize fixed part of activation frame 883 generate_fixed_frame(true); 884 885 // make sure method is native & not abstract 886 #ifdef ASSERT 887 __ movl(rax, access_flags); 888 { 889 Label L; 890 __ testl(rax, JVM_ACC_NATIVE); 891 __ jcc(Assembler::notZero, L); 892 __ stop("tried to execute non-native method as native"); 893 __ bind(L); 894 } 895 { 896 Label L; 897 __ testl(rax, JVM_ACC_ABSTRACT); 898 __ jcc(Assembler::zero, L); 899 __ stop("tried to execute abstract method in interpreter"); 900 __ bind(L); 901 } 902 #endif 903 904 // Since at this point in the method invocation the exception handler 905 // would try to exit the monitor of synchronized methods which hasn't 906 // been entered yet, we set the thread local variable 907 // _do_not_unlock_if_synchronized to true. The remove_activation will 908 // check this flag. 909 910 const Address do_not_unlock_if_synchronized(r15_thread, 911 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 912 __ movbool(do_not_unlock_if_synchronized, true); 913 914 // increment invocation count & check for overflow 915 Label invocation_counter_overflow; 916 if (inc_counter) { 917 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 918 } 919 920 Label continue_after_compile; 921 __ bind(continue_after_compile); 922 923 bang_stack_shadow_pages(true); 924 925 // reset the _do_not_unlock_if_synchronized flag 926 __ movbool(do_not_unlock_if_synchronized, false); 927 928 // check for synchronized methods 929 // Must happen AFTER invocation_counter check and stack overflow check, 930 // so method is not locked if overflows. 931 if (synchronized) { 932 lock_method(); 933 } else { 934 // no synchronization necessary 935 #ifdef ASSERT 936 { 937 Label L; 938 __ movl(rax, access_flags); 939 __ testl(rax, JVM_ACC_SYNCHRONIZED); 940 __ jcc(Assembler::zero, L); 941 __ stop("method needs synchronization"); 942 __ bind(L); 943 } 944 #endif 945 } 946 947 // start execution 948 #ifdef ASSERT 949 { 950 Label L; 951 const Address monitor_block_top(rbp, 952 frame::interpreter_frame_monitor_block_top_offset * wordSize); 953 __ movptr(rax, monitor_block_top); 954 __ cmpptr(rax, rsp); 955 __ jcc(Assembler::equal, L); 956 __ stop("broken stack frame setup in interpreter"); 957 __ bind(L); 958 } 959 #endif 960 961 // jvmti support 962 __ notify_method_entry(); 963 964 // work registers 965 const Register method = rbx; 966 const Register t = r11; 967 968 // allocate space for parameters 969 __ get_method(method); 970 __ verify_oop(method); 971 __ load_unsigned_short(t, 972 Address(method, 973 methodOopDesc::size_of_parameters_offset())); 974 __ shll(t, Interpreter::logStackElementSize); 975 976 __ subptr(rsp, t); 977 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 978 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) 979 980 // get signature handler 981 { 982 Label L; 983 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset())); 984 __ testptr(t, t); 985 __ jcc(Assembler::notZero, L); 986 __ call_VM(noreg, 987 CAST_FROM_FN_PTR(address, 988 InterpreterRuntime::prepare_native_call), 989 method); 990 __ get_method(method); 991 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset())); 992 __ bind(L); 993 } 994 995 // call signature handler 996 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == r14, 997 "adjust this code"); 998 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp, 999 "adjust this code"); 1000 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1, 1001 "adjust this code"); 1002 1003 // The generated handlers do not touch RBX (the method oop). 1004 // However, large signatures cannot be cached and are generated 1005 // each time here. The slow-path generator can do a GC on return, 1006 // so we must reload it after the call. 1007 __ call(t); 1008 __ get_method(method); // slow path can do a GC, reload RBX 1009 1010 1011 // result handler is in rax 1012 // set result handler 1013 __ movptr(Address(rbp, 1014 (frame::interpreter_frame_result_handler_offset) * wordSize), 1015 rax); 1016 1017 // pass mirror handle if static call 1018 { 1019 Label L; 1020 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 1021 __ movl(t, Address(method, methodOopDesc::access_flags_offset())); 1022 __ testl(t, JVM_ACC_STATIC); 1023 __ jcc(Assembler::zero, L); 1024 // get mirror 1025 __ movptr(t, Address(method, methodOopDesc::const_offset())); 1026 __ movptr(t, Address(t, constMethodOopDesc::constants_offset())); 1027 __ movptr(t, Address(t, constantPoolOopDesc::pool_holder_offset_in_bytes())); 1028 __ movptr(t, Address(t, mirror_offset)); 1029 // copy mirror into activation frame 1030 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), 1031 t); 1032 // pass handle to mirror 1033 __ lea(c_rarg1, 1034 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 1035 __ bind(L); 1036 } 1037 1038 // get native function entry point 1039 { 1040 Label L; 1041 __ movptr(rax, Address(method, methodOopDesc::native_function_offset())); 1042 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 1043 __ movptr(rscratch2, unsatisfied.addr()); 1044 __ cmpptr(rax, rscratch2); 1045 __ jcc(Assembler::notEqual, L); 1046 __ call_VM(noreg, 1047 CAST_FROM_FN_PTR(address, 1048 InterpreterRuntime::prepare_native_call), 1049 method); 1050 __ get_method(method); 1051 __ verify_oop(method); 1052 __ movptr(rax, Address(method, methodOopDesc::native_function_offset())); 1053 __ bind(L); 1054 } 1055 1056 // pass JNIEnv 1057 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset())); 1058 1059 // It is enough that the pc() points into the right code 1060 // segment. It does not have to be the correct return pc. 1061 __ set_last_Java_frame(rsp, rbp, (address) __ pc()); 1062 1063 // change thread state 1064 #ifdef ASSERT 1065 { 1066 Label L; 1067 __ movl(t, Address(r15_thread, JavaThread::thread_state_offset())); 1068 __ cmpl(t, _thread_in_Java); 1069 __ jcc(Assembler::equal, L); 1070 __ stop("Wrong thread state in native stub"); 1071 __ bind(L); 1072 } 1073 #endif 1074 1075 // Change state to native 1076 1077 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), 1078 _thread_in_native); 1079 1080 // Call the native method. 1081 __ call(rax); 1082 // result potentially in rax or xmm0 1083 1084 // Depending on runtime options, either restore the MXCSR 1085 // register after returning from the JNI Call or verify that 1086 // it wasn't changed during -Xcheck:jni. 1087 if (RestoreMXCSROnJNICalls) { 1088 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); 1089 } 1090 else if (CheckJNICalls) { 1091 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::verify_mxcsr_entry()))); 1092 } 1093 1094 // NOTE: The order of these pushes is known to frame::interpreter_frame_result 1095 // in order to extract the result of a method call. If the order of these 1096 // pushes change or anything else is added to the stack then the code in 1097 // interpreter_frame_result must also change. 1098 1099 __ push(dtos); 1100 __ push(ltos); 1101 1102 // change thread state 1103 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), 1104 _thread_in_native_trans); 1105 1106 if (os::is_MP()) { 1107 if (UseMembar) { 1108 // Force this write out before the read below 1109 __ membar(Assembler::Membar_mask_bits( 1110 Assembler::LoadLoad | Assembler::LoadStore | 1111 Assembler::StoreLoad | Assembler::StoreStore)); 1112 } else { 1113 // Write serialization page so VM thread can do a pseudo remote membar. 1114 // We use the current thread pointer to calculate a thread specific 1115 // offset to write to within the page. This minimizes bus traffic 1116 // due to cache line collision. 1117 __ serialize_memory(r15_thread, rscratch2); 1118 } 1119 } 1120 1121 // check for safepoint operation in progress and/or pending suspend requests 1122 { 1123 Label Continue; 1124 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 1125 SafepointSynchronize::_not_synchronized); 1126 1127 Label L; 1128 __ jcc(Assembler::notEqual, L); 1129 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); 1130 __ jcc(Assembler::equal, Continue); 1131 __ bind(L); 1132 1133 // Don't use call_VM as it will see a possible pending exception 1134 // and forward it and never return here preventing us from 1135 // clearing _last_native_pc down below. Also can't use 1136 // call_VM_leaf either as it will check to see if r13 & r14 are 1137 // preserved and correspond to the bcp/locals pointers. So we do a 1138 // runtime call by hand. 1139 // 1140 __ mov(c_rarg0, r15_thread); 1141 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1142 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1143 __ andptr(rsp, -16); // align stack as required by ABI 1144 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); 1145 __ mov(rsp, r12); // restore sp 1146 __ reinit_heapbase(); 1147 __ bind(Continue); 1148 } 1149 1150 // change thread state 1151 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); 1152 1153 // reset_last_Java_frame 1154 __ reset_last_Java_frame(true, true); 1155 1156 // reset handle block 1157 __ movptr(t, Address(r15_thread, JavaThread::active_handles_offset())); 1158 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); 1159 1160 // If result is an oop unbox and store it in frame where gc will see it 1161 // and result handler will pick it up 1162 1163 { 1164 Label no_oop, store_result; 1165 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); 1166 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); 1167 __ jcc(Assembler::notEqual, no_oop); 1168 // retrieve result 1169 __ pop(ltos); 1170 __ testptr(rax, rax); 1171 __ jcc(Assembler::zero, store_result); 1172 __ movptr(rax, Address(rax, 0)); 1173 __ bind(store_result); 1174 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax); 1175 // keep stack depth as expected by pushing oop which will eventually be discarde 1176 __ push(ltos); 1177 __ bind(no_oop); 1178 } 1179 1180 1181 { 1182 Label no_reguard; 1183 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), 1184 JavaThread::stack_guard_yellow_disabled); 1185 __ jcc(Assembler::notEqual, no_reguard); 1186 1187 __ pusha(); // XXX only save smashed registers 1188 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1189 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1190 __ andptr(rsp, -16); // align stack as required by ABI 1191 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1192 __ mov(rsp, r12); // restore sp 1193 __ popa(); // XXX only restore smashed registers 1194 __ reinit_heapbase(); 1195 1196 __ bind(no_reguard); 1197 } 1198 1199 1200 // The method register is junk from after the thread_in_native transition 1201 // until here. Also can't call_VM until the bcp has been 1202 // restored. Need bcp for throwing exception below so get it now. 1203 __ get_method(method); 1204 __ verify_oop(method); 1205 1206 // restore r13 to have legal interpreter frame, i.e., bci == 0 <=> 1207 // r13 == code_base() 1208 __ movptr(r13, Address(method, methodOopDesc::const_offset())); // get constMethodOop 1209 __ lea(r13, Address(r13, constMethodOopDesc::codes_offset())); // get codebase 1210 // handle exceptions (exception handling will handle unlocking!) 1211 { 1212 Label L; 1213 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 1214 __ jcc(Assembler::zero, L); 1215 // Note: At some point we may want to unify this with the code 1216 // used in call_VM_base(); i.e., we should use the 1217 // StubRoutines::forward_exception code. For now this doesn't work 1218 // here because the rsp is not correctly set at this point. 1219 __ MacroAssembler::call_VM(noreg, 1220 CAST_FROM_FN_PTR(address, 1221 InterpreterRuntime::throw_pending_exception)); 1222 __ should_not_reach_here(); 1223 __ bind(L); 1224 } 1225 1226 // do unlocking if necessary 1227 { 1228 Label L; 1229 __ movl(t, Address(method, methodOopDesc::access_flags_offset())); 1230 __ testl(t, JVM_ACC_SYNCHRONIZED); 1231 __ jcc(Assembler::zero, L); 1232 // the code below should be shared with interpreter macro 1233 // assembler implementation 1234 { 1235 Label unlock; 1236 // BasicObjectLock will be first in list, since this is a 1237 // synchronized method. However, need to check that the object 1238 // has not been unlocked by an explicit monitorexit bytecode. 1239 const Address monitor(rbp, 1240 (intptr_t)(frame::interpreter_frame_initial_sp_offset * 1241 wordSize - sizeof(BasicObjectLock))); 1242 1243 // monitor expect in c_rarg1 for slow unlock path 1244 __ lea(c_rarg1, monitor); // address of first monitor 1245 1246 __ movptr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); 1247 __ testptr(t, t); 1248 __ jcc(Assembler::notZero, unlock); 1249 1250 // Entry already unlocked, need to throw exception 1251 __ MacroAssembler::call_VM(noreg, 1252 CAST_FROM_FN_PTR(address, 1253 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1254 __ should_not_reach_here(); 1255 1256 __ bind(unlock); 1257 __ unlock_object(c_rarg1); 1258 } 1259 __ bind(L); 1260 } 1261 1262 // jvmti support 1263 // Note: This must happen _after_ handling/throwing any exceptions since 1264 // the exception handler code notifies the runtime of method exits 1265 // too. If this happens before, method entry/exit notifications are 1266 // not properly paired (was bug - gri 11/22/99). 1267 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1268 1269 // restore potential result in edx:eax, call result handler to 1270 // restore potential result in ST0 & handle result 1271 1272 __ pop(ltos); 1273 __ pop(dtos); 1274 1275 __ movptr(t, Address(rbp, 1276 (frame::interpreter_frame_result_handler_offset) * wordSize)); 1277 __ call(t); 1278 1279 // remove activation 1280 __ movptr(t, Address(rbp, 1281 frame::interpreter_frame_sender_sp_offset * 1282 wordSize)); // get sender sp 1283 __ leave(); // remove frame anchor 1284 __ pop(rdi); // get return address 1285 __ mov(rsp, t); // set sp to sender sp 1286 __ jmp(rdi); 1287 1288 if (inc_counter) { 1289 // Handle overflow of counter and compile method 1290 __ bind(invocation_counter_overflow); 1291 generate_counter_overflow(&continue_after_compile); 1292 } 1293 1294 return entry_point; 1295 } 1296 1297 // 1298 // Generic interpreted method entry to (asm) interpreter 1299 // 1300 address InterpreterGenerator::generate_normal_entry(bool synchronized) { 1301 // determine code generation flags 1302 bool inc_counter = UseCompiler || CountCompiledCalls; 1303 1304 // ebx: methodOop 1305 // r13: sender sp 1306 address entry_point = __ pc(); 1307 1308 const Address size_of_parameters(rbx, 1309 methodOopDesc::size_of_parameters_offset()); 1310 const Address size_of_locals(rbx, methodOopDesc::size_of_locals_offset()); 1311 const Address invocation_counter(rbx, 1312 methodOopDesc::invocation_counter_offset() + 1313 InvocationCounter::counter_offset()); 1314 const Address access_flags(rbx, methodOopDesc::access_flags_offset()); 1315 1316 // get parameter size (always needed) 1317 __ load_unsigned_short(rcx, size_of_parameters); 1318 1319 // rbx: methodOop 1320 // rcx: size of parameters 1321 // r13: sender_sp (could differ from sp+wordSize if we were called via c2i ) 1322 1323 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words 1324 __ subl(rdx, rcx); // rdx = no. of additional locals 1325 1326 // YYY 1327 // __ incrementl(rdx); 1328 // __ andl(rdx, -2); 1329 1330 // see if we've got enough room on the stack for locals plus overhead. 1331 generate_stack_overflow_check(); 1332 1333 // get return address 1334 __ pop(rax); 1335 1336 // compute beginning of parameters (r14) 1337 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize)); 1338 1339 // rdx - # of additional locals 1340 // allocate space for locals 1341 // explicitly initialize locals 1342 { 1343 Label exit, loop; 1344 __ testl(rdx, rdx); 1345 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 1346 __ bind(loop); 1347 __ push((int) NULL_WORD); // initialize local variables 1348 __ decrementl(rdx); // until everything initialized 1349 __ jcc(Assembler::greater, loop); 1350 __ bind(exit); 1351 } 1352 1353 // (pre-)fetch invocation count 1354 if (inc_counter) { 1355 __ movl(rcx, invocation_counter); 1356 } 1357 // initialize fixed part of activation frame 1358 generate_fixed_frame(false); 1359 1360 // make sure method is not native & not abstract 1361 #ifdef ASSERT 1362 __ movl(rax, access_flags); 1363 { 1364 Label L; 1365 __ testl(rax, JVM_ACC_NATIVE); 1366 __ jcc(Assembler::zero, L); 1367 __ stop("tried to execute native method as non-native"); 1368 __ bind(L); 1369 } 1370 { 1371 Label L; 1372 __ testl(rax, JVM_ACC_ABSTRACT); 1373 __ jcc(Assembler::zero, L); 1374 __ stop("tried to execute abstract method in interpreter"); 1375 __ bind(L); 1376 } 1377 #endif 1378 1379 // Since at this point in the method invocation the exception 1380 // handler would try to exit the monitor of synchronized methods 1381 // which hasn't been entered yet, we set the thread local variable 1382 // _do_not_unlock_if_synchronized to true. The remove_activation 1383 // will check this flag. 1384 1385 const Address do_not_unlock_if_synchronized(r15_thread, 1386 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1387 __ movbool(do_not_unlock_if_synchronized, true); 1388 1389 // increment invocation count & check for overflow 1390 Label invocation_counter_overflow; 1391 Label profile_method; 1392 Label profile_method_continue; 1393 if (inc_counter) { 1394 generate_counter_incr(&invocation_counter_overflow, 1395 &profile_method, 1396 &profile_method_continue); 1397 if (ProfileInterpreter) { 1398 __ bind(profile_method_continue); 1399 } 1400 } 1401 1402 Label continue_after_compile; 1403 __ bind(continue_after_compile); 1404 1405 // check for synchronized interpreted methods 1406 bang_stack_shadow_pages(false); 1407 1408 // reset the _do_not_unlock_if_synchronized flag 1409 __ movbool(do_not_unlock_if_synchronized, false); 1410 1411 // check for synchronized methods 1412 // Must happen AFTER invocation_counter check and stack overflow check, 1413 // so method is not locked if overflows. 1414 if (synchronized) { 1415 // Allocate monitor and lock method 1416 lock_method(); 1417 } else { 1418 // no synchronization necessary 1419 #ifdef ASSERT 1420 { 1421 Label L; 1422 __ movl(rax, access_flags); 1423 __ testl(rax, JVM_ACC_SYNCHRONIZED); 1424 __ jcc(Assembler::zero, L); 1425 __ stop("method needs synchronization"); 1426 __ bind(L); 1427 } 1428 #endif 1429 } 1430 1431 // start execution 1432 #ifdef ASSERT 1433 { 1434 Label L; 1435 const Address monitor_block_top (rbp, 1436 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1437 __ movptr(rax, monitor_block_top); 1438 __ cmpptr(rax, rsp); 1439 __ jcc(Assembler::equal, L); 1440 __ stop("broken stack frame setup in interpreter"); 1441 __ bind(L); 1442 } 1443 #endif 1444 1445 // jvmti support 1446 __ notify_method_entry(); 1447 1448 __ dispatch_next(vtos); 1449 1450 // invocation counter overflow 1451 if (inc_counter) { 1452 if (ProfileInterpreter) { 1453 // We have decided to profile this method in the interpreter 1454 __ bind(profile_method); 1455 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1456 __ set_method_data_pointer_for_bcp(); 1457 __ get_method(rbx); 1458 __ jmp(profile_method_continue); 1459 } 1460 // Handle overflow of counter and compile method 1461 __ bind(invocation_counter_overflow); 1462 generate_counter_overflow(&continue_after_compile); 1463 } 1464 1465 return entry_point; 1466 } 1467 1468 // Entry points 1469 // 1470 // Here we generate the various kind of entries into the interpreter. 1471 // The two main entry type are generic bytecode methods and native 1472 // call method. These both come in synchronized and non-synchronized 1473 // versions but the frame layout they create is very similar. The 1474 // other method entry types are really just special purpose entries 1475 // that are really entry and interpretation all in one. These are for 1476 // trivial methods like accessor, empty, or special math methods. 1477 // 1478 // When control flow reaches any of the entry types for the interpreter 1479 // the following holds -> 1480 // 1481 // Arguments: 1482 // 1483 // rbx: methodOop 1484 // 1485 // Stack layout immediately at entry 1486 // 1487 // [ return address ] <--- rsp 1488 // [ parameter n ] 1489 // ... 1490 // [ parameter 1 ] 1491 // [ expression stack ] (caller's java expression stack) 1492 1493 // Assuming that we don't go to one of the trivial specialized entries 1494 // the stack will look like below when we are ready to execute the 1495 // first bytecode (or call the native routine). The register usage 1496 // will be as the template based interpreter expects (see 1497 // interpreter_amd64.hpp). 1498 // 1499 // local variables follow incoming parameters immediately; i.e. 1500 // the return address is moved to the end of the locals). 1501 // 1502 // [ monitor entry ] <--- rsp 1503 // ... 1504 // [ monitor entry ] 1505 // [ expr. stack bottom ] 1506 // [ saved r13 ] 1507 // [ current r14 ] 1508 // [ methodOop ] 1509 // [ saved ebp ] <--- rbp 1510 // [ return address ] 1511 // [ local variable m ] 1512 // ... 1513 // [ local variable 1 ] 1514 // [ parameter n ] 1515 // ... 1516 // [ parameter 1 ] <--- r14 1517 1518 address AbstractInterpreterGenerator::generate_method_entry( 1519 AbstractInterpreter::MethodKind kind) { 1520 // determine code generation flags 1521 bool synchronized = false; 1522 address entry_point = NULL; 1523 1524 switch (kind) { 1525 case Interpreter::zerolocals : break; 1526 case Interpreter::zerolocals_synchronized: synchronized = true; break; 1527 case Interpreter::native : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(false); break; 1528 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*) this)->generate_native_entry(true); break; 1529 case Interpreter::empty : entry_point = ((InterpreterGenerator*) this)->generate_empty_entry(); break; 1530 case Interpreter::accessor : entry_point = ((InterpreterGenerator*) this)->generate_accessor_entry(); break; 1531 case Interpreter::abstract : entry_point = ((InterpreterGenerator*) this)->generate_abstract_entry(); break; 1532 case Interpreter::method_handle : entry_point = ((InterpreterGenerator*) this)->generate_method_handle_entry();break; 1533 1534 case Interpreter::java_lang_math_sin : // fall thru 1535 case Interpreter::java_lang_math_cos : // fall thru 1536 case Interpreter::java_lang_math_tan : // fall thru 1537 case Interpreter::java_lang_math_abs : // fall thru 1538 case Interpreter::java_lang_math_log : // fall thru 1539 case Interpreter::java_lang_math_log10 : // fall thru 1540 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*) this)->generate_math_entry(kind); break; 1541 case Interpreter::java_lang_ref_reference_get 1542 : entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break; 1543 default : ShouldNotReachHere(); break; 1544 } 1545 1546 if (entry_point) { 1547 return entry_point; 1548 } 1549 1550 return ((InterpreterGenerator*) this)-> 1551 generate_normal_entry(synchronized); 1552 } 1553 1554 // These should never be compiled since the interpreter will prefer 1555 // the compiled version to the intrinsic version. 1556 bool AbstractInterpreter::can_be_compiled(methodHandle m) { 1557 switch (method_kind(m)) { 1558 case Interpreter::java_lang_math_sin : // fall thru 1559 case Interpreter::java_lang_math_cos : // fall thru 1560 case Interpreter::java_lang_math_tan : // fall thru 1561 case Interpreter::java_lang_math_abs : // fall thru 1562 case Interpreter::java_lang_math_log : // fall thru 1563 case Interpreter::java_lang_math_log10 : // fall thru 1564 case Interpreter::java_lang_math_sqrt : 1565 return false; 1566 default: 1567 return true; 1568 } 1569 } 1570 1571 // How much stack a method activation needs in words. 1572 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) { 1573 const int entry_size = frame::interpreter_frame_monitor_size(); 1574 1575 // total overhead size: entry_size + (saved rbp thru expr stack 1576 // bottom). be sure to change this if you add/subtract anything 1577 // to/from the overhead area 1578 const int overhead_size = 1579 -(frame::interpreter_frame_initial_sp_offset) + entry_size; 1580 1581 const int stub_code = frame::entry_frame_after_call_words; 1582 const int extra_stack = methodOopDesc::extra_stack_entries(); 1583 const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) * 1584 Interpreter::stackElementWords; 1585 return (overhead_size + method_stack + stub_code); 1586 } 1587 1588 int AbstractInterpreter::layout_activation(methodOop method, 1589 int tempcount, 1590 int popframe_extra_args, 1591 int moncount, 1592 int caller_actual_parameters, 1593 int callee_param_count, 1594 int callee_locals, 1595 frame* caller, 1596 frame* interpreter_frame, 1597 bool is_top_frame) { 1598 // Note: This calculation must exactly parallel the frame setup 1599 // in AbstractInterpreterGenerator::generate_method_entry. 1600 // If interpreter_frame!=NULL, set up the method, locals, and monitors. 1601 // The frame interpreter_frame, if not NULL, is guaranteed to be the 1602 // right size, as determined by a previous call to this method. 1603 // It is also guaranteed to be walkable even though it is in a skeletal state 1604 1605 // fixed size of an interpreter frame: 1606 int max_locals = method->max_locals() * Interpreter::stackElementWords; 1607 int extra_locals = (method->max_locals() - method->size_of_parameters()) * 1608 Interpreter::stackElementWords; 1609 1610 int overhead = frame::sender_sp_offset - 1611 frame::interpreter_frame_initial_sp_offset; 1612 // Our locals were accounted for by the caller (or last_frame_adjust 1613 // on the transistion) Since the callee parameters already account 1614 // for the callee's params we only need to account for the extra 1615 // locals. 1616 int size = overhead + 1617 (callee_locals - callee_param_count)*Interpreter::stackElementWords + 1618 moncount * frame::interpreter_frame_monitor_size() + 1619 tempcount* Interpreter::stackElementWords + popframe_extra_args; 1620 if (interpreter_frame != NULL) { 1621 #ifdef ASSERT 1622 if (!EnableInvokeDynamic) 1623 // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences? 1624 // Probably, since deoptimization doesn't work yet. 1625 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable"); 1626 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)"); 1627 #endif 1628 1629 interpreter_frame->interpreter_frame_set_method(method); 1630 // NOTE the difference in using sender_sp and 1631 // interpreter_frame_sender_sp interpreter_frame_sender_sp is 1632 // the original sp of the caller (the unextended_sp) and 1633 // sender_sp is fp+16 XXX 1634 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1; 1635 1636 #ifdef ASSERT 1637 if (caller->is_interpreted_frame()) { 1638 assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement"); 1639 } 1640 #endif 1641 1642 interpreter_frame->interpreter_frame_set_locals(locals); 1643 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin(); 1644 BasicObjectLock* monbot = montop - moncount; 1645 interpreter_frame->interpreter_frame_set_monitor_end(monbot); 1646 1647 // Set last_sp 1648 intptr_t* esp = (intptr_t*) monbot - 1649 tempcount*Interpreter::stackElementWords - 1650 popframe_extra_args; 1651 interpreter_frame->interpreter_frame_set_last_sp(esp); 1652 1653 // All frames but the initial (oldest) interpreter frame we fill in have 1654 // a value for sender_sp that allows walking the stack but isn't 1655 // truly correct. Correct the value here. 1656 if (extra_locals != 0 && 1657 interpreter_frame->sender_sp() == 1658 interpreter_frame->interpreter_frame_sender_sp()) { 1659 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + 1660 extra_locals); 1661 } 1662 *interpreter_frame->interpreter_frame_cache_addr() = 1663 method->constants()->cache(); 1664 } 1665 return size; 1666 } 1667 1668 //----------------------------------------------------------------------------- 1669 // Exceptions 1670 1671 void TemplateInterpreterGenerator::generate_throw_exception() { 1672 // Entry point in previous activation (i.e., if the caller was 1673 // interpreted) 1674 Interpreter::_rethrow_exception_entry = __ pc(); 1675 // Restore sp to interpreter_frame_last_sp even though we are going 1676 // to empty the expression stack for the exception processing. 1677 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1678 // rax: exception 1679 // rdx: return address/pc that threw exception 1680 __ restore_bcp(); // r13 points to call/send 1681 __ restore_locals(); 1682 __ reinit_heapbase(); // restore r12 as heapbase. 1683 // Entry point for exceptions thrown within interpreter code 1684 Interpreter::_throw_exception_entry = __ pc(); 1685 // expression stack is undefined here 1686 // rax: exception 1687 // r13: exception bcp 1688 __ verify_oop(rax); 1689 __ mov(c_rarg1, rax); 1690 1691 // expression stack must be empty before entering the VM in case of 1692 // an exception 1693 __ empty_expression_stack(); 1694 // find exception handler address and preserve exception oop 1695 __ call_VM(rdx, 1696 CAST_FROM_FN_PTR(address, 1697 InterpreterRuntime::exception_handler_for_exception), 1698 c_rarg1); 1699 // rax: exception handler entry point 1700 // rdx: preserved exception oop 1701 // r13: bcp for exception handler 1702 __ push_ptr(rdx); // push exception which is now the only value on the stack 1703 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) 1704 1705 // If the exception is not handled in the current frame the frame is 1706 // removed and the exception is rethrown (i.e. exception 1707 // continuation is _rethrow_exception). 1708 // 1709 // Note: At this point the bci is still the bxi for the instruction 1710 // which caused the exception and the expression stack is 1711 // empty. Thus, for any VM calls at this point, GC will find a legal 1712 // oop map (with empty expression stack). 1713 1714 // In current activation 1715 // tos: exception 1716 // esi: exception bcp 1717 1718 // 1719 // JVMTI PopFrame support 1720 // 1721 1722 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1723 __ empty_expression_stack(); 1724 // Set the popframe_processing bit in pending_popframe_condition 1725 // indicating that we are currently handling popframe, so that 1726 // call_VMs that may happen later do not trigger new popframe 1727 // handling cycles. 1728 __ movl(rdx, Address(r15_thread, JavaThread::popframe_condition_offset())); 1729 __ orl(rdx, JavaThread::popframe_processing_bit); 1730 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), rdx); 1731 1732 { 1733 // Check to see whether we are returning to a deoptimized frame. 1734 // (The PopFrame call ensures that the caller of the popped frame is 1735 // either interpreted or compiled and deoptimizes it if compiled.) 1736 // In this case, we can't call dispatch_next() after the frame is 1737 // popped, but instead must save the incoming arguments and restore 1738 // them after deoptimization has occurred. 1739 // 1740 // Note that we don't compare the return PC against the 1741 // deoptimization blob's unpack entry because of the presence of 1742 // adapter frames in C2. 1743 Label caller_not_deoptimized; 1744 __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize)); 1745 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1746 InterpreterRuntime::interpreter_contains), c_rarg1); 1747 __ testl(rax, rax); 1748 __ jcc(Assembler::notZero, caller_not_deoptimized); 1749 1750 // Compute size of arguments for saving when returning to 1751 // deoptimized caller 1752 __ get_method(rax); 1753 __ load_unsigned_short(rax, Address(rax, in_bytes(methodOopDesc:: 1754 size_of_parameters_offset()))); 1755 __ shll(rax, Interpreter::logStackElementSize); 1756 __ restore_locals(); // XXX do we need this? 1757 __ subptr(r14, rax); 1758 __ addptr(r14, wordSize); 1759 // Save these arguments 1760 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1761 Deoptimization:: 1762 popframe_preserve_args), 1763 r15_thread, rax, r14); 1764 1765 __ remove_activation(vtos, rdx, 1766 /* throw_monitor_exception */ false, 1767 /* install_monitor_exception */ false, 1768 /* notify_jvmdi */ false); 1769 1770 // Inform deoptimization that it is responsible for restoring 1771 // these arguments 1772 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), 1773 JavaThread::popframe_force_deopt_reexecution_bit); 1774 1775 // Continue in deoptimization handler 1776 __ jmp(rdx); 1777 1778 __ bind(caller_not_deoptimized); 1779 } 1780 1781 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */ 1782 /* throw_monitor_exception */ false, 1783 /* install_monitor_exception */ false, 1784 /* notify_jvmdi */ false); 1785 1786 // Finish with popframe handling 1787 // A previous I2C followed by a deoptimization might have moved the 1788 // outgoing arguments further up the stack. PopFrame expects the 1789 // mutations to those outgoing arguments to be preserved and other 1790 // constraints basically require this frame to look exactly as 1791 // though it had previously invoked an interpreted activation with 1792 // no space between the top of the expression stack (current 1793 // last_sp) and the top of stack. Rather than force deopt to 1794 // maintain this kind of invariant all the time we call a small 1795 // fixup routine to move the mutated arguments onto the top of our 1796 // expression stack if necessary. 1797 __ mov(c_rarg1, rsp); 1798 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1799 // PC must point into interpreter here 1800 __ set_last_Java_frame(noreg, rbp, __ pc()); 1801 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2); 1802 __ reset_last_Java_frame(true, true); 1803 // Restore the last_sp and null it out 1804 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1805 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1806 1807 __ restore_bcp(); // XXX do we need this? 1808 __ restore_locals(); // XXX do we need this? 1809 // The method data pointer was incremented already during 1810 // call profiling. We have to restore the mdp for the current bcp. 1811 if (ProfileInterpreter) { 1812 __ set_method_data_pointer_for_bcp(); 1813 } 1814 1815 // Clear the popframe condition flag 1816 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), 1817 JavaThread::popframe_inactive); 1818 1819 __ dispatch_next(vtos); 1820 // end of PopFrame support 1821 1822 Interpreter::_remove_activation_entry = __ pc(); 1823 1824 // preserve exception over this code sequence 1825 __ pop_ptr(rax); 1826 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), rax); 1827 // remove the activation (without doing throws on illegalMonitorExceptions) 1828 __ remove_activation(vtos, rdx, false, true, false); 1829 // restore exception 1830 __ movptr(rax, Address(r15_thread, JavaThread::vm_result_offset())); 1831 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int32_t)NULL_WORD); 1832 __ verify_oop(rax); 1833 1834 // In between activations - previous activation type unknown yet 1835 // compute continuation point - the continuation point expects the 1836 // following registers set up: 1837 // 1838 // rax: exception 1839 // rdx: return address/pc that threw exception 1840 // rsp: expression stack of caller 1841 // rbp: ebp of caller 1842 __ push(rax); // save exception 1843 __ push(rdx); // save return address 1844 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1845 SharedRuntime::exception_handler_for_return_address), 1846 r15_thread, rdx); 1847 __ mov(rbx, rax); // save exception handler 1848 __ pop(rdx); // restore return address 1849 __ pop(rax); // restore exception 1850 // Note that an "issuing PC" is actually the next PC after the call 1851 __ jmp(rbx); // jump to exception 1852 // handler of caller 1853 } 1854 1855 1856 // 1857 // JVMTI ForceEarlyReturn support 1858 // 1859 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1860 address entry = __ pc(); 1861 1862 __ restore_bcp(); 1863 __ restore_locals(); 1864 __ empty_expression_stack(); 1865 __ load_earlyret_value(state); 1866 1867 __ movptr(rdx, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); 1868 Address cond_addr(rdx, JvmtiThreadState::earlyret_state_offset()); 1869 1870 // Clear the earlyret state 1871 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); 1872 1873 __ remove_activation(state, rsi, 1874 false, /* throw_monitor_exception */ 1875 false, /* install_monitor_exception */ 1876 true); /* notify_jvmdi */ 1877 __ jmp(rsi); 1878 1879 return entry; 1880 } // end of ForceEarlyReturn support 1881 1882 1883 //----------------------------------------------------------------------------- 1884 // Helper for vtos entry point generation 1885 1886 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 1887 address& bep, 1888 address& cep, 1889 address& sep, 1890 address& aep, 1891 address& iep, 1892 address& lep, 1893 address& fep, 1894 address& dep, 1895 address& vep) { 1896 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1897 Label L; 1898 aep = __ pc(); __ push_ptr(); __ jmp(L); 1899 fep = __ pc(); __ push_f(); __ jmp(L); 1900 dep = __ pc(); __ push_d(); __ jmp(L); 1901 lep = __ pc(); __ push_l(); __ jmp(L); 1902 bep = cep = sep = 1903 iep = __ pc(); __ push_i(); 1904 vep = __ pc(); 1905 __ bind(L); 1906 generate_and_dispatch(t); 1907 } 1908 1909 1910 //----------------------------------------------------------------------------- 1911 // Generation of individual instructions 1912 1913 // helpers for generate_and_dispatch 1914 1915 1916 InterpreterGenerator::InterpreterGenerator(StubQueue* code) 1917 : TemplateInterpreterGenerator(code) { 1918 generate_all(); // down here so it can be "virtual" 1919 } 1920 1921 //----------------------------------------------------------------------------- 1922 1923 // Non-product code 1924 #ifndef PRODUCT 1925 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1926 address entry = __ pc(); 1927 1928 __ push(state); 1929 __ push(c_rarg0); 1930 __ push(c_rarg1); 1931 __ push(c_rarg2); 1932 __ push(c_rarg3); 1933 __ mov(c_rarg2, rax); // Pass itos 1934 #ifdef _WIN64 1935 __ movflt(xmm3, xmm0); // Pass ftos 1936 #endif 1937 __ call_VM(noreg, 1938 CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), 1939 c_rarg1, c_rarg2, c_rarg3); 1940 __ pop(c_rarg3); 1941 __ pop(c_rarg2); 1942 __ pop(c_rarg1); 1943 __ pop(c_rarg0); 1944 __ pop(state); 1945 __ ret(0); // return from result handler 1946 1947 return entry; 1948 } 1949 1950 void TemplateInterpreterGenerator::count_bytecode() { 1951 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); 1952 } 1953 1954 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 1955 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); 1956 } 1957 1958 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 1959 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index)); 1960 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); 1961 __ orl(rbx, 1962 ((int) t->bytecode()) << 1963 BytecodePairHistogram::log2_number_of_codes); 1964 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); 1965 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters)); 1966 __ incrementl(Address(rscratch1, rbx, Address::times_4)); 1967 } 1968 1969 1970 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 1971 // Call a little run-time stub to avoid blow-up for each bytecode. 1972 // The run-time runtime saves the right registers, depending on 1973 // the tosca in-state for the given template. 1974 1975 assert(Interpreter::trace_code(t->tos_in()) != NULL, 1976 "entry must have been generated"); 1977 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1978 __ andptr(rsp, -16); // align stack as required by ABI 1979 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1980 __ mov(rsp, r12); // restore sp 1981 __ reinit_heapbase(); 1982 } 1983 1984 1985 void TemplateInterpreterGenerator::stop_interpreter_at() { 1986 Label L; 1987 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), 1988 StopInterpreterAt); 1989 __ jcc(Assembler::notEqual, L); 1990 __ int3(); 1991 __ bind(L); 1992 } 1993 #endif // !PRODUCT 1994 #endif // ! CC_INTERP