1 /* 2 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "asm/macroAssembler.hpp" 27 #include "interpreter/bytecodeHistogram.hpp" 28 #include "interpreter/interpreter.hpp" 29 #include "interpreter/interpreterGenerator.hpp" 30 #include "interpreter/interpreterRuntime.hpp" 31 #include "interpreter/interp_masm.hpp" 32 #include "interpreter/templateTable.hpp" 33 #include "oops/arrayOop.hpp" 34 #include "oops/methodData.hpp" 35 #include "oops/method.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "prims/jvmtiExport.hpp" 38 #include "prims/jvmtiThreadState.hpp" 39 #include "runtime/arguments.hpp" 40 #include "runtime/deoptimization.hpp" 41 #include "runtime/frame.inline.hpp" 42 #include "runtime/sharedRuntime.hpp" 43 #include "runtime/stubRoutines.hpp" 44 #include "runtime/synchronizer.hpp" 45 #include "runtime/timer.hpp" 46 #include "runtime/vframeArray.hpp" 47 #include "utilities/debug.hpp" 48 #include "utilities/macros.hpp" 49 50 #define __ _masm-> 51 52 #ifndef CC_INTERP 53 54 const int method_offset = frame::interpreter_frame_method_offset * wordSize; 55 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize; 56 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; 57 58 //----------------------------------------------------------------------------- 59 60 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 61 address entry = __ pc(); 62 63 #ifdef ASSERT 64 { 65 Label L; 66 __ lea(rax, Address(rbp, 67 frame::interpreter_frame_monitor_block_top_offset * 68 wordSize)); 69 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack 70 // grows negative) 71 __ jcc(Assembler::aboveEqual, L); // check if frame is complete 72 __ stop ("interpreter frame not set up"); 73 __ bind(L); 74 } 75 #endif // ASSERT 76 // Restore bcp under the assumption that the current frame is still 77 // interpreted 78 __ restore_bcp(); 79 80 // expression stack must be empty before entering the VM if an 81 // exception happened 82 __ empty_expression_stack(); 83 // throw exception 84 __ call_VM(noreg, 85 CAST_FROM_FN_PTR(address, 86 InterpreterRuntime::throw_StackOverflowError)); 87 return entry; 88 } 89 90 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler( 91 const char* name) { 92 address entry = __ pc(); 93 // expression stack must be empty before entering the VM if an 94 // exception happened 95 __ empty_expression_stack(); 96 // setup parameters 97 // ??? convention: expect aberrant index in register ebx 98 __ lea(c_rarg1, ExternalAddress((address)name)); 99 __ call_VM(noreg, 100 CAST_FROM_FN_PTR(address, 101 InterpreterRuntime:: 102 throw_ArrayIndexOutOfBoundsException), 103 c_rarg1, rbx); 104 return entry; 105 } 106 107 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 108 address entry = __ pc(); 109 110 // object is at TOS 111 __ pop(c_rarg1); 112 113 // expression stack must be empty before entering the VM if an 114 // exception happened 115 __ empty_expression_stack(); 116 117 __ call_VM(noreg, 118 CAST_FROM_FN_PTR(address, 119 InterpreterRuntime:: 120 throw_ClassCastException), 121 c_rarg1); 122 return entry; 123 } 124 125 address TemplateInterpreterGenerator::generate_exception_handler_common( 126 const char* name, const char* message, bool pass_oop) { 127 assert(!pass_oop || message == NULL, "either oop or message but not both"); 128 address entry = __ pc(); 129 if (pass_oop) { 130 // object is at TOS 131 __ pop(c_rarg2); 132 } 133 // expression stack must be empty before entering the VM if an 134 // exception happened 135 __ empty_expression_stack(); 136 // setup parameters 137 __ lea(c_rarg1, ExternalAddress((address)name)); 138 if (pass_oop) { 139 __ call_VM(rax, CAST_FROM_FN_PTR(address, 140 InterpreterRuntime:: 141 create_klass_exception), 142 c_rarg1, c_rarg2); 143 } else { 144 // kind of lame ExternalAddress can't take NULL because 145 // external_word_Relocation will assert. 146 if (message != NULL) { 147 __ lea(c_rarg2, ExternalAddress((address)message)); 148 } else { 149 __ movptr(c_rarg2, NULL_WORD); 150 } 151 __ call_VM(rax, 152 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 153 c_rarg1, c_rarg2); 154 } 155 // throw exception 156 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 157 return entry; 158 } 159 160 161 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { 162 address entry = __ pc(); 163 // NULL last_sp until next java call 164 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 165 __ dispatch_next(state); 166 return entry; 167 } 168 169 170 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { 171 address entry = __ pc(); 172 173 // Restore stack bottom in case i2c adjusted stack 174 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 175 // and NULL it as marker that esp is now tos until next java call 176 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 177 178 __ restore_bcp(); 179 __ restore_locals(); 180 181 if (state == atos) { 182 Register mdp = rbx; 183 Register tmp = rcx; 184 __ profile_return_type(mdp, rax, tmp); 185 } 186 187 const Register cache = rbx; 188 const Register index = rcx; 189 __ get_cache_and_index_at_bcp(cache, index, 1, index_size); 190 191 const Register flags = cache; 192 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); 193 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask); 194 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale())); 195 __ dispatch_next(state, step); 196 197 return entry; 198 } 199 200 201 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, 202 int step) { 203 address entry = __ pc(); 204 // NULL last_sp until next java call 205 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 206 __ restore_bcp(); 207 __ restore_locals(); 208 // handle exceptions 209 { 210 Label L; 211 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 212 __ jcc(Assembler::zero, L); 213 __ call_VM(noreg, 214 CAST_FROM_FN_PTR(address, 215 InterpreterRuntime::throw_pending_exception)); 216 __ should_not_reach_here(); 217 __ bind(L); 218 } 219 __ dispatch_next(state, step); 220 return entry; 221 } 222 223 int AbstractInterpreter::BasicType_as_index(BasicType type) { 224 int i = 0; 225 switch (type) { 226 case T_BOOLEAN: i = 0; break; 227 case T_CHAR : i = 1; break; 228 case T_BYTE : i = 2; break; 229 case T_SHORT : i = 3; break; 230 case T_INT : i = 4; break; 231 case T_LONG : i = 5; break; 232 case T_VOID : i = 6; break; 233 case T_FLOAT : i = 7; break; 234 case T_DOUBLE : i = 8; break; 235 case T_OBJECT : i = 9; break; 236 case T_ARRAY : i = 9; break; 237 default : ShouldNotReachHere(); 238 } 239 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, 240 "index out of bounds"); 241 return i; 242 } 243 244 245 address TemplateInterpreterGenerator::generate_result_handler_for( 246 BasicType type) { 247 address entry = __ pc(); 248 switch (type) { 249 case T_BOOLEAN: __ c2bool(rax); break; 250 case T_CHAR : __ movzwl(rax, rax); break; 251 case T_BYTE : __ sign_extend_byte(rax); break; 252 case T_SHORT : __ sign_extend_short(rax); break; 253 case T_INT : /* nothing to do */ break; 254 case T_LONG : /* nothing to do */ break; 255 case T_VOID : /* nothing to do */ break; 256 case T_FLOAT : /* nothing to do */ break; 257 case T_DOUBLE : /* nothing to do */ break; 258 case T_OBJECT : 259 // retrieve result from frame 260 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); 261 // and verify it 262 __ verify_oop(rax); 263 break; 264 default : ShouldNotReachHere(); 265 } 266 __ ret(0); // return from result handler 267 return entry; 268 } 269 270 address TemplateInterpreterGenerator::generate_safept_entry_for( 271 TosState state, 272 address runtime_entry) { 273 address entry = __ pc(); 274 __ push(state); 275 __ call_VM(noreg, runtime_entry); 276 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 277 return entry; 278 } 279 280 281 282 // Helpers for commoning out cases in the various type of method entries. 283 // 284 285 286 // increment invocation count & check for overflow 287 // 288 // Note: checking for negative value instead of overflow 289 // so we have a 'sticky' overflow test 290 // 291 // rbx: method 292 // ecx: invocation counter 293 // 294 void InterpreterGenerator::generate_counter_incr( 295 Label* overflow, 296 Label* profile_method, 297 Label* profile_method_continue) { 298 Label done; 299 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. 300 if (TieredCompilation) { 301 int increment = InvocationCounter::count_increment; 302 Label no_mdo; 303 if (ProfileInterpreter) { 304 // Are we profiling? 305 __ movptr(rax, Address(rbx, Method::method_data_offset())); 306 __ testptr(rax, rax); 307 __ jccb(Assembler::zero, no_mdo); 308 // Increment counter in the MDO 309 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) + 310 in_bytes(InvocationCounter::counter_offset())); 311 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset())); 312 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); 313 __ jmp(done); 314 } 315 __ bind(no_mdo); 316 // Increment counter in MethodCounters 317 const Address invocation_counter(rax, 318 MethodCounters::invocation_counter_offset() + 319 InvocationCounter::counter_offset()); 320 __ get_method_counters(rbx, rax, done); 321 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset())); 322 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, 323 false, Assembler::zero, overflow); 324 __ bind(done); 325 } else { // not TieredCompilation 326 const Address backedge_counter(rax, 327 MethodCounters::backedge_counter_offset() + 328 InvocationCounter::counter_offset()); 329 const Address invocation_counter(rax, 330 MethodCounters::invocation_counter_offset() + 331 InvocationCounter::counter_offset()); 332 333 __ get_method_counters(rbx, rax, done); 334 335 if (ProfileInterpreter) { 336 __ incrementl(Address(rax, 337 MethodCounters::interpreter_invocation_counter_offset())); 338 } 339 // Update standard invocation counters 340 __ movl(rcx, invocation_counter); 341 __ incrementl(rcx, InvocationCounter::count_increment); 342 __ movl(invocation_counter, rcx); // save invocation count 343 344 __ movl(rax, backedge_counter); // load backedge counter 345 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits 346 347 __ addl(rcx, rax); // add both counters 348 349 // profile_method is non-null only for interpreted method so 350 // profile_method != NULL == !native_call 351 352 if (ProfileInterpreter && profile_method != NULL) { 353 // Test to see if we should create a method data oop 354 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 355 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 356 __ jcc(Assembler::less, *profile_method_continue); 357 358 // if no method data exists, go to profile_method 359 __ test_method_data_pointer(rax, *profile_method); 360 } 361 362 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 363 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset()))); 364 __ jcc(Assembler::aboveEqual, *overflow); 365 __ bind(done); 366 } 367 } 368 369 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { 370 371 // Asm interpreter on entry 372 // r14 - locals 373 // r13 - bcp 374 // rbx - method 375 // edx - cpool --- DOES NOT APPEAR TO BE TRUE 376 // rbp - interpreter frame 377 378 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 379 // Everything as it was on entry 380 // rdx is not restored. Doesn't appear to really be set. 381 382 // InterpreterRuntime::frequency_counter_overflow takes two 383 // arguments, the first (thread) is passed by call_VM, the second 384 // indicates if the counter overflow occurs at a backwards branch 385 // (NULL bcp). We pass zero for it. The call returns the address 386 // of the verified entry point for the method or NULL if the 387 // compilation did not complete (either went background or bailed 388 // out). 389 __ movl(c_rarg1, 0); 390 __ call_VM(noreg, 391 CAST_FROM_FN_PTR(address, 392 InterpreterRuntime::frequency_counter_overflow), 393 c_rarg1); 394 395 __ movptr(rbx, Address(rbp, method_offset)); // restore Method* 396 // Preserve invariant that r13/r14 contain bcp/locals of sender frame 397 // and jump to the interpreted entry. 398 __ jmp(*do_continue, relocInfo::none); 399 } 400 401 // See if we've got enough room on the stack for locals plus overhead. 402 // The expression stack grows down incrementally, so the normal guard 403 // page mechanism will work for that. 404 // 405 // NOTE: Since the additional locals are also always pushed (wasn't 406 // obvious in generate_fixed_frame) so the guard should work for them 407 // too. 408 // 409 // Args: 410 // rdx: number of additional locals this frame needs (what we must check) 411 // rbx: Method* 412 // 413 // Kills: 414 // rax 415 void InterpreterGenerator::generate_stack_overflow_check(void) { 416 417 // monitor entry size: see picture of stack in frame_x86.hpp 418 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 419 420 // total overhead size: entry_size + (saved rbp through expr stack 421 // bottom). be sure to change this if you add/subtract anything 422 // to/from the overhead area 423 const int overhead_size = 424 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; 425 426 const int page_size = os::vm_page_size(); 427 428 Label after_frame_check; 429 430 // see if the frame is greater than one page in size. If so, 431 // then we need to verify there is enough stack space remaining 432 // for the additional locals. 433 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize); 434 __ jcc(Assembler::belowEqual, after_frame_check); 435 436 // compute rsp as if this were going to be the last frame on 437 // the stack before the red zone 438 439 const Address stack_base(r15_thread, Thread::stack_base_offset()); 440 const Address stack_size(r15_thread, Thread::stack_size_offset()); 441 442 // locals + overhead, in bytes 443 __ mov(rax, rdx); 444 __ shlptr(rax, Interpreter::logStackElementSize); // 2 slots per parameter. 445 __ addptr(rax, overhead_size); 446 447 #ifdef ASSERT 448 Label stack_base_okay, stack_size_okay; 449 // verify that thread stack base is non-zero 450 __ cmpptr(stack_base, (int32_t)NULL_WORD); 451 __ jcc(Assembler::notEqual, stack_base_okay); 452 __ stop("stack base is zero"); 453 __ bind(stack_base_okay); 454 // verify that thread stack size is non-zero 455 __ cmpptr(stack_size, 0); 456 __ jcc(Assembler::notEqual, stack_size_okay); 457 __ stop("stack size is zero"); 458 __ bind(stack_size_okay); 459 #endif 460 461 // Add stack base to locals and subtract stack size 462 __ addptr(rax, stack_base); 463 __ subptr(rax, stack_size); 464 465 // Use the maximum number of pages we might bang. 466 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages : 467 (StackRedPages+StackYellowPages); 468 469 // add in the red and yellow zone sizes 470 __ addptr(rax, max_pages * page_size); 471 472 // check against the current stack bottom 473 __ cmpptr(rsp, rax); 474 __ jcc(Assembler::above, after_frame_check); 475 476 // Restore sender's sp as SP. This is necessary if the sender's 477 // frame is an extended compiled frame (see gen_c2i_adapter()) 478 // and safer anyway in case of JSR292 adaptations. 479 480 __ pop(rax); // return address must be moved if SP is changed 481 __ mov(rsp, r13); 482 __ push(rax); 483 484 // Note: the restored frame is not necessarily interpreted. 485 // Use the shared runtime version of the StackOverflowError. 486 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 487 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry())); 488 489 // all done with frame size check 490 __ bind(after_frame_check); 491 } 492 493 // Allocate monitor and lock method (asm interpreter) 494 // 495 // Args: 496 // rbx: Method* 497 // r14: locals 498 // 499 // Kills: 500 // rax 501 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) 502 // rscratch1, rscratch2 (scratch regs) 503 void InterpreterGenerator::lock_method(void) { 504 // synchronize method 505 const Address access_flags(rbx, Method::access_flags_offset()); 506 const Address monitor_block_top( 507 rbp, 508 frame::interpreter_frame_monitor_block_top_offset * wordSize); 509 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 510 511 #ifdef ASSERT 512 { 513 Label L; 514 __ movl(rax, access_flags); 515 __ testl(rax, JVM_ACC_SYNCHRONIZED); 516 __ jcc(Assembler::notZero, L); 517 __ stop("method doesn't need synchronization"); 518 __ bind(L); 519 } 520 #endif // ASSERT 521 522 // get synchronization object 523 { 524 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 525 Label done; 526 __ movl(rax, access_flags); 527 __ testl(rax, JVM_ACC_STATIC); 528 // get receiver (assume this is frequent case) 529 __ movptr(rax, Address(r14, Interpreter::local_offset_in_bytes(0))); 530 __ jcc(Assembler::zero, done); 531 __ movptr(rax, Address(rbx, Method::const_offset())); 532 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); 533 __ movptr(rax, Address(rax, 534 ConstantPool::pool_holder_offset_in_bytes())); 535 __ movptr(rax, Address(rax, mirror_offset)); 536 537 #ifdef ASSERT 538 { 539 Label L; 540 __ testptr(rax, rax); 541 __ jcc(Assembler::notZero, L); 542 __ stop("synchronization object is NULL"); 543 __ bind(L); 544 } 545 #endif // ASSERT 546 547 __ bind(done); 548 } 549 550 // add space for monitor & lock 551 __ subptr(rsp, entry_size); // add space for a monitor entry 552 __ movptr(monitor_block_top, rsp); // set new monitor block top 553 // store object 554 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); 555 __ movptr(c_rarg1, rsp); // object address 556 __ lock_object(c_rarg1); 557 } 558 559 // Generate a fixed interpreter frame. This is identical setup for 560 // interpreted methods and for native methods hence the shared code. 561 // 562 // Args: 563 // rax: return address 564 // rbx: Method* 565 // r14: pointer to locals 566 // r13: sender sp 567 // rdx: cp cache 568 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 569 // initialize fixed part of activation frame 570 __ push(rax); // save return address 571 __ enter(); // save old & set new rbp 572 __ push(r13); // set sender sp 573 __ push((int)NULL_WORD); // leave last_sp as null 574 __ movptr(r13, Address(rbx, Method::const_offset())); // get ConstMethod* 575 __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase 576 __ push(rbx); // save Method* 577 if (ProfileInterpreter) { 578 Label method_data_continue; 579 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset()))); 580 __ testptr(rdx, rdx); 581 __ jcc(Assembler::zero, method_data_continue); 582 __ addptr(rdx, in_bytes(MethodData::data_offset())); 583 __ bind(method_data_continue); 584 __ push(rdx); // set the mdp (method data pointer) 585 } else { 586 __ push(0); 587 } 588 589 __ movptr(rdx, Address(rbx, Method::const_offset())); 590 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); 591 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); 592 __ push(rdx); // set constant pool cache 593 __ push(r14); // set locals pointer 594 if (native_call) { 595 __ push(0); // no bcp 596 } else { 597 __ push(r13); // set bcp 598 } 599 __ push(0); // reserve word for pointer to expression stack bottom 600 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom 601 } 602 603 // End of helpers 604 605 // Method entry for java.lang.ref.Reference.get. 606 address InterpreterGenerator::generate_Reference_get_entry(void) { 607 #if INCLUDE_ALL_GCS 608 // Code: _aload_0, _getfield, _areturn 609 // parameter size = 1 610 // 611 // The code that gets generated by this routine is split into 2 parts: 612 // 1. The "intrinsified" code for G1 (or any SATB based GC), 613 // 2. The slow path - which is an expansion of the regular method entry. 614 // 615 // Notes:- 616 // * In the G1 code we do not check whether we need to block for 617 // a safepoint. If G1 is enabled then we must execute the specialized 618 // code for Reference.get (except when the Reference object is null) 619 // so that we can log the value in the referent field with an SATB 620 // update buffer. 621 // If the code for the getfield template is modified so that the 622 // G1 pre-barrier code is executed when the current method is 623 // Reference.get() then going through the normal method entry 624 // will be fine. 625 // * The G1 code can, however, check the receiver object (the instance 626 // of java.lang.Reference) and jump to the slow path if null. If the 627 // Reference object is null then we obviously cannot fetch the referent 628 // and so we don't need to call the G1 pre-barrier. Thus we can use the 629 // regular method entry code to generate the NPE. 630 // 631 // rbx: Method* 632 633 // r13: senderSP must preserve for slow path, set SP to it on fast path 634 635 address entry = __ pc(); 636 637 const int referent_offset = java_lang_ref_Reference::referent_offset; 638 guarantee(referent_offset > 0, "referent offset not initialized"); 639 640 if (UseG1GC) { 641 Label slow_path; 642 // rbx: method 643 644 // Check if local 0 != NULL 645 // If the receiver is null then it is OK to jump to the slow path. 646 __ movptr(rax, Address(rsp, wordSize)); 647 648 __ testptr(rax, rax); 649 __ jcc(Assembler::zero, slow_path); 650 651 // rax: local 0 652 // rbx: method (but can be used as scratch now) 653 // rdx: scratch 654 // rdi: scratch 655 656 // Generate the G1 pre-barrier code to log the value of 657 // the referent field in an SATB buffer. 658 659 // Load the value of the referent field. 660 const Address field_address(rax, referent_offset); 661 __ load_heap_oop(rax, field_address); 662 663 // Generate the G1 pre-barrier code to log the value of 664 // the referent field in an SATB buffer. 665 __ g1_write_barrier_pre(noreg /* obj */, 666 rax /* pre_val */, 667 r15_thread /* thread */, 668 rbx /* tmp */, 669 true /* tosca_live */, 670 true /* expand_call */); 671 672 // _areturn 673 __ pop(rdi); // get return address 674 __ mov(rsp, r13); // set sp to sender sp 675 __ jmp(rdi); 676 __ ret(0); 677 678 // generate a vanilla interpreter entry as the slow path 679 __ bind(slow_path); 680 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); 681 return entry; 682 } 683 #endif // INCLUDE_ALL_GCS 684 685 // If G1 is not enabled then attempt to go through the accessor entry point 686 // Reference.get is an accessor 687 return NULL; 688 } 689 690 /** 691 * Method entry for static native methods: 692 * int java.util.zip.CRC32.update(int crc, int b) 693 */ 694 address InterpreterGenerator::generate_CRC32_update_entry() { 695 if (UseCRC32Intrinsics) { 696 address entry = __ pc(); 697 698 // rbx,: Method* 699 // r13: senderSP must preserved for slow path, set SP to it on fast path 700 // c_rarg0: scratch (rdi on non-Win64, rcx on Win64) 701 // c_rarg1: scratch (rsi on non-Win64, rdx on Win64) 702 703 Label slow_path; 704 // If we need a safepoint check, generate full interpreter entry. 705 ExternalAddress state(SafepointSynchronize::address_of_state()); 706 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 707 SafepointSynchronize::_not_synchronized); 708 __ jcc(Assembler::notEqual, slow_path); 709 710 // We don't generate local frame and don't align stack because 711 // we call stub code and there is no safepoint on this path. 712 713 // Load parameters 714 const Register crc = rax; // crc 715 const Register val = c_rarg0; // source java byte value 716 const Register tbl = c_rarg1; // scratch 717 718 // Arguments are reversed on java expression stack 719 __ movl(val, Address(rsp, wordSize)); // byte value 720 __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC 721 722 __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr())); 723 __ notl(crc); // ~crc 724 __ update_byte_crc32(crc, val, tbl); 725 __ notl(crc); // ~crc 726 // result in rax 727 728 // _areturn 729 __ pop(rdi); // get return address 730 __ mov(rsp, r13); // set sp to sender sp 731 __ jmp(rdi); 732 733 // generate a vanilla native entry as the slow path 734 __ bind(slow_path); 735 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native)); 736 return entry; 737 } 738 return NULL; 739 } 740 741 /** 742 * Method entry for static native methods: 743 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len) 744 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len) 745 */ 746 address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 747 if (UseCRC32Intrinsics) { 748 address entry = __ pc(); 749 750 // rbx,: Method* 751 // r13: senderSP must preserved for slow path, set SP to it on fast path 752 753 Label slow_path; 754 // If we need a safepoint check, generate full interpreter entry. 755 ExternalAddress state(SafepointSynchronize::address_of_state()); 756 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 757 SafepointSynchronize::_not_synchronized); 758 __ jcc(Assembler::notEqual, slow_path); 759 760 // We don't generate local frame and don't align stack because 761 // we call stub code and there is no safepoint on this path. 762 763 // Load parameters 764 const Register crc = c_rarg0; // crc 765 const Register buf = c_rarg1; // source java byte array address 766 const Register len = c_rarg2; // length 767 const Register off = len; // offset (never overlaps with 'len') 768 769 // Arguments are reversed on java expression stack 770 // Calculate address of start element 771 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { 772 __ movptr(buf, Address(rsp, 3*wordSize)); // long buf 773 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset 774 __ addq(buf, off); // + offset 775 __ movl(crc, Address(rsp, 5*wordSize)); // Initial CRC 776 } else { 777 __ movptr(buf, Address(rsp, 3*wordSize)); // byte[] array 778 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size 779 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset 780 __ addq(buf, off); // + offset 781 __ movl(crc, Address(rsp, 4*wordSize)); // Initial CRC 782 } 783 // Can now load 'len' since we're finished with 'off' 784 __ movl(len, Address(rsp, wordSize)); // Length 785 786 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len); 787 // result in rax 788 789 // _areturn 790 __ pop(rdi); // get return address 791 __ mov(rsp, r13); // set sp to sender sp 792 __ jmp(rdi); 793 794 // generate a vanilla native entry as the slow path 795 __ bind(slow_path); 796 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native)); 797 return entry; 798 } 799 return NULL; 800 } 801 802 /** 803 * Method entry for static native methods: 804 * int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end) 805 * int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end) 806 */ 807 address InterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { 808 if (UseCRC32CIntrinsics) { 809 address entry = __ pc(); 810 // Load parameters 811 const Register crc = c_rarg0; // crc 812 const Register buf = c_rarg1; // source java byte array address 813 const Register len = c_rarg2; 814 const Register off = c_rarg3; // offset 815 const Register end = len; 816 817 // Arguments are reversed on java expression stack 818 // Calculate address of start element 819 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { 820 __ movptr(buf, Address(rsp, 3 * wordSize)); // long buf 821 __ movl2ptr(off, Address(rsp, 2 * wordSize)); // offset 822 __ addq(buf, off); // + offset 823 __ movl(crc, Address(rsp, 5 * wordSize)); // Initial CRC 824 // Note on 5 * wordSize vs. 4 * wordSize: 825 // * int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end) 826 // 4 2,3 1 0 827 // end starts at SP + 8 828 // The Java(R) Virtual Machine Specification Java SE 7 Edition 829 // 4.10.2.3. Values of Types long and double 830 // "When calculating operand stack length, values of type long and double have length two." 831 } else { 832 __ movptr(buf, Address(rsp, 3 * wordSize)); // byte[] array 833 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size 834 __ movl2ptr(off, Address(rsp, 2 * wordSize)); // offset 835 __ addq(buf, off); // + offset 836 __ movl(crc, Address(rsp, 4 * wordSize)); // Initial CRC 837 } 838 __ movl(end, Address(rsp, wordSize)); // end 839 __ subl(end, off); // end - off 840 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32C()), crc, buf, len); 841 // result in rax 842 // _areturn 843 __ pop(rdi); // get return address 844 __ mov(rsp, r13); // set sp to sender sp 845 __ jmp(rdi); 846 847 return entry; 848 } 849 850 return NULL; 851 } 852 853 // Interpreter stub for calling a native method. (asm interpreter) 854 // This sets up a somewhat different looking stack for calling the 855 // native method than the typical interpreter frame setup. 856 address InterpreterGenerator::generate_native_entry(bool synchronized) { 857 // determine code generation flags 858 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 859 860 // rbx: Method* 861 // r13: sender sp 862 863 address entry_point = __ pc(); 864 865 const Address constMethod (rbx, Method::const_offset()); 866 const Address access_flags (rbx, Method::access_flags_offset()); 867 const Address size_of_parameters(rcx, ConstMethod:: 868 size_of_parameters_offset()); 869 870 871 // get parameter size (always needed) 872 __ movptr(rcx, constMethod); 873 __ load_unsigned_short(rcx, size_of_parameters); 874 875 // native calls don't need the stack size check since they have no 876 // expression stack and the arguments are already on the stack and 877 // we only add a handful of words to the stack 878 879 // rbx: Method* 880 // rcx: size of parameters 881 // r13: sender sp 882 __ pop(rax); // get return address 883 884 // for natives the size of locals is zero 885 886 // compute beginning of parameters (r14) 887 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize)); 888 889 // add 2 zero-initialized slots for native calls 890 // initialize result_handler slot 891 __ push((int) NULL_WORD); 892 // slot for oop temp 893 // (static native method holder mirror/jni oop result) 894 __ push((int) NULL_WORD); 895 896 // initialize fixed part of activation frame 897 generate_fixed_frame(true); 898 899 // make sure method is native & not abstract 900 #ifdef ASSERT 901 __ movl(rax, access_flags); 902 { 903 Label L; 904 __ testl(rax, JVM_ACC_NATIVE); 905 __ jcc(Assembler::notZero, L); 906 __ stop("tried to execute non-native method as native"); 907 __ bind(L); 908 } 909 { 910 Label L; 911 __ testl(rax, JVM_ACC_ABSTRACT); 912 __ jcc(Assembler::zero, L); 913 __ stop("tried to execute abstract method in interpreter"); 914 __ bind(L); 915 } 916 #endif 917 918 // Since at this point in the method invocation the exception handler 919 // would try to exit the monitor of synchronized methods which hasn't 920 // been entered yet, we set the thread local variable 921 // _do_not_unlock_if_synchronized to true. The remove_activation will 922 // check this flag. 923 924 const Address do_not_unlock_if_synchronized(r15_thread, 925 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 926 __ movbool(do_not_unlock_if_synchronized, true); 927 928 // increment invocation count & check for overflow 929 Label invocation_counter_overflow; 930 if (inc_counter) { 931 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 932 } 933 934 Label continue_after_compile; 935 __ bind(continue_after_compile); 936 937 bang_stack_shadow_pages(true); 938 939 // reset the _do_not_unlock_if_synchronized flag 940 __ movbool(do_not_unlock_if_synchronized, false); 941 942 // check for synchronized methods 943 // Must happen AFTER invocation_counter check and stack overflow check, 944 // so method is not locked if overflows. 945 if (synchronized) { 946 lock_method(); 947 } else { 948 // no synchronization necessary 949 #ifdef ASSERT 950 { 951 Label L; 952 __ movl(rax, access_flags); 953 __ testl(rax, JVM_ACC_SYNCHRONIZED); 954 __ jcc(Assembler::zero, L); 955 __ stop("method needs synchronization"); 956 __ bind(L); 957 } 958 #endif 959 } 960 961 // start execution 962 #ifdef ASSERT 963 { 964 Label L; 965 const Address monitor_block_top(rbp, 966 frame::interpreter_frame_monitor_block_top_offset * wordSize); 967 __ movptr(rax, monitor_block_top); 968 __ cmpptr(rax, rsp); 969 __ jcc(Assembler::equal, L); 970 __ stop("broken stack frame setup in interpreter"); 971 __ bind(L); 972 } 973 #endif 974 975 // jvmti support 976 __ notify_method_entry(); 977 978 // work registers 979 const Register method = rbx; 980 const Register t = r11; 981 982 // allocate space for parameters 983 __ get_method(method); 984 __ movptr(t, Address(method, Method::const_offset())); 985 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); 986 __ shll(t, Interpreter::logStackElementSize); 987 988 __ subptr(rsp, t); 989 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 990 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) 991 992 // get signature handler 993 { 994 Label L; 995 __ movptr(t, Address(method, Method::signature_handler_offset())); 996 __ testptr(t, t); 997 __ jcc(Assembler::notZero, L); 998 __ call_VM(noreg, 999 CAST_FROM_FN_PTR(address, 1000 InterpreterRuntime::prepare_native_call), 1001 method); 1002 __ get_method(method); 1003 __ movptr(t, Address(method, Method::signature_handler_offset())); 1004 __ bind(L); 1005 } 1006 1007 // call signature handler 1008 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == r14, 1009 "adjust this code"); 1010 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp, 1011 "adjust this code"); 1012 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1, 1013 "adjust this code"); 1014 1015 // The generated handlers do not touch RBX (the method oop). 1016 // However, large signatures cannot be cached and are generated 1017 // each time here. The slow-path generator can do a GC on return, 1018 // so we must reload it after the call. 1019 __ call(t); 1020 __ get_method(method); // slow path can do a GC, reload RBX 1021 1022 1023 // result handler is in rax 1024 // set result handler 1025 __ movptr(Address(rbp, 1026 (frame::interpreter_frame_result_handler_offset) * wordSize), 1027 rax); 1028 1029 // pass mirror handle if static call 1030 { 1031 Label L; 1032 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 1033 __ movl(t, Address(method, Method::access_flags_offset())); 1034 __ testl(t, JVM_ACC_STATIC); 1035 __ jcc(Assembler::zero, L); 1036 // get mirror 1037 __ movptr(t, Address(method, Method::const_offset())); 1038 __ movptr(t, Address(t, ConstMethod::constants_offset())); 1039 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes())); 1040 __ movptr(t, Address(t, mirror_offset)); 1041 // copy mirror into activation frame 1042 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), 1043 t); 1044 // pass handle to mirror 1045 __ lea(c_rarg1, 1046 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 1047 __ bind(L); 1048 } 1049 1050 // get native function entry point 1051 { 1052 Label L; 1053 __ movptr(rax, Address(method, Method::native_function_offset())); 1054 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 1055 __ movptr(rscratch2, unsatisfied.addr()); 1056 __ cmpptr(rax, rscratch2); 1057 __ jcc(Assembler::notEqual, L); 1058 __ call_VM(noreg, 1059 CAST_FROM_FN_PTR(address, 1060 InterpreterRuntime::prepare_native_call), 1061 method); 1062 __ get_method(method); 1063 __ movptr(rax, Address(method, Method::native_function_offset())); 1064 __ bind(L); 1065 } 1066 1067 // pass JNIEnv 1068 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset())); 1069 1070 // It is enough that the pc() points into the right code 1071 // segment. It does not have to be the correct return pc. 1072 __ set_last_Java_frame(rsp, rbp, (address) __ pc()); 1073 1074 // change thread state 1075 #ifdef ASSERT 1076 { 1077 Label L; 1078 __ movl(t, Address(r15_thread, JavaThread::thread_state_offset())); 1079 __ cmpl(t, _thread_in_Java); 1080 __ jcc(Assembler::equal, L); 1081 __ stop("Wrong thread state in native stub"); 1082 __ bind(L); 1083 } 1084 #endif 1085 1086 // Change state to native 1087 1088 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), 1089 _thread_in_native); 1090 1091 // Call the native method. 1092 __ call(rax); 1093 // result potentially in rax or xmm0 1094 1095 // Verify or restore cpu control state after JNI call 1096 __ restore_cpu_control_state_after_jni(); 1097 1098 // NOTE: The order of these pushes is known to frame::interpreter_frame_result 1099 // in order to extract the result of a method call. If the order of these 1100 // pushes change or anything else is added to the stack then the code in 1101 // interpreter_frame_result must also change. 1102 1103 __ push(dtos); 1104 __ push(ltos); 1105 1106 // change thread state 1107 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), 1108 _thread_in_native_trans); 1109 1110 if (os::is_MP()) { 1111 if (UseMembar) { 1112 // Force this write out before the read below 1113 __ membar(Assembler::Membar_mask_bits( 1114 Assembler::LoadLoad | Assembler::LoadStore | 1115 Assembler::StoreLoad | Assembler::StoreStore)); 1116 } else { 1117 // Write serialization page so VM thread can do a pseudo remote membar. 1118 // We use the current thread pointer to calculate a thread specific 1119 // offset to write to within the page. This minimizes bus traffic 1120 // due to cache line collision. 1121 __ serialize_memory(r15_thread, rscratch2); 1122 } 1123 } 1124 1125 // check for safepoint operation in progress and/or pending suspend requests 1126 { 1127 Label Continue; 1128 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 1129 SafepointSynchronize::_not_synchronized); 1130 1131 Label L; 1132 __ jcc(Assembler::notEqual, L); 1133 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); 1134 __ jcc(Assembler::equal, Continue); 1135 __ bind(L); 1136 1137 // Don't use call_VM as it will see a possible pending exception 1138 // and forward it and never return here preventing us from 1139 // clearing _last_native_pc down below. Also can't use 1140 // call_VM_leaf either as it will check to see if r13 & r14 are 1141 // preserved and correspond to the bcp/locals pointers. So we do a 1142 // runtime call by hand. 1143 // 1144 __ mov(c_rarg0, r15_thread); 1145 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1146 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1147 __ andptr(rsp, -16); // align stack as required by ABI 1148 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); 1149 __ mov(rsp, r12); // restore sp 1150 __ reinit_heapbase(); 1151 __ bind(Continue); 1152 } 1153 1154 // change thread state 1155 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); 1156 1157 // reset_last_Java_frame 1158 __ reset_last_Java_frame(true, true); 1159 1160 // reset handle block 1161 __ movptr(t, Address(r15_thread, JavaThread::active_handles_offset())); 1162 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); 1163 1164 // If result is an oop unbox and store it in frame where gc will see it 1165 // and result handler will pick it up 1166 1167 { 1168 Label no_oop, store_result; 1169 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); 1170 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); 1171 __ jcc(Assembler::notEqual, no_oop); 1172 // retrieve result 1173 __ pop(ltos); 1174 __ testptr(rax, rax); 1175 __ jcc(Assembler::zero, store_result); 1176 __ movptr(rax, Address(rax, 0)); 1177 __ bind(store_result); 1178 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax); 1179 // keep stack depth as expected by pushing oop which will eventually be discarde 1180 __ push(ltos); 1181 __ bind(no_oop); 1182 } 1183 1184 1185 { 1186 Label no_reguard; 1187 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), 1188 JavaThread::stack_guard_yellow_disabled); 1189 __ jcc(Assembler::notEqual, no_reguard); 1190 1191 __ pusha(); // XXX only save smashed registers 1192 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1193 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1194 __ andptr(rsp, -16); // align stack as required by ABI 1195 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1196 __ mov(rsp, r12); // restore sp 1197 __ popa(); // XXX only restore smashed registers 1198 __ reinit_heapbase(); 1199 1200 __ bind(no_reguard); 1201 } 1202 1203 1204 // The method register is junk from after the thread_in_native transition 1205 // until here. Also can't call_VM until the bcp has been 1206 // restored. Need bcp for throwing exception below so get it now. 1207 __ get_method(method); 1208 1209 // restore r13 to have legal interpreter frame, i.e., bci == 0 <=> 1210 // r13 == code_base() 1211 __ movptr(r13, Address(method, Method::const_offset())); // get ConstMethod* 1212 __ lea(r13, Address(r13, ConstMethod::codes_offset())); // get codebase 1213 // handle exceptions (exception handling will handle unlocking!) 1214 { 1215 Label L; 1216 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 1217 __ jcc(Assembler::zero, L); 1218 // Note: At some point we may want to unify this with the code 1219 // used in call_VM_base(); i.e., we should use the 1220 // StubRoutines::forward_exception code. For now this doesn't work 1221 // here because the rsp is not correctly set at this point. 1222 __ MacroAssembler::call_VM(noreg, 1223 CAST_FROM_FN_PTR(address, 1224 InterpreterRuntime::throw_pending_exception)); 1225 __ should_not_reach_here(); 1226 __ bind(L); 1227 } 1228 1229 // do unlocking if necessary 1230 { 1231 Label L; 1232 __ movl(t, Address(method, Method::access_flags_offset())); 1233 __ testl(t, JVM_ACC_SYNCHRONIZED); 1234 __ jcc(Assembler::zero, L); 1235 // the code below should be shared with interpreter macro 1236 // assembler implementation 1237 { 1238 Label unlock; 1239 // BasicObjectLock will be first in list, since this is a 1240 // synchronized method. However, need to check that the object 1241 // has not been unlocked by an explicit monitorexit bytecode. 1242 const Address monitor(rbp, 1243 (intptr_t)(frame::interpreter_frame_initial_sp_offset * 1244 wordSize - sizeof(BasicObjectLock))); 1245 1246 // monitor expect in c_rarg1 for slow unlock path 1247 __ lea(c_rarg1, monitor); // address of first monitor 1248 1249 __ movptr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); 1250 __ testptr(t, t); 1251 __ jcc(Assembler::notZero, unlock); 1252 1253 // Entry already unlocked, need to throw exception 1254 __ MacroAssembler::call_VM(noreg, 1255 CAST_FROM_FN_PTR(address, 1256 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1257 __ should_not_reach_here(); 1258 1259 __ bind(unlock); 1260 __ unlock_object(c_rarg1); 1261 } 1262 __ bind(L); 1263 } 1264 1265 // jvmti support 1266 // Note: This must happen _after_ handling/throwing any exceptions since 1267 // the exception handler code notifies the runtime of method exits 1268 // too. If this happens before, method entry/exit notifications are 1269 // not properly paired (was bug - gri 11/22/99). 1270 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1271 1272 // restore potential result in edx:eax, call result handler to 1273 // restore potential result in ST0 & handle result 1274 1275 __ pop(ltos); 1276 __ pop(dtos); 1277 1278 __ movptr(t, Address(rbp, 1279 (frame::interpreter_frame_result_handler_offset) * wordSize)); 1280 __ call(t); 1281 1282 // remove activation 1283 __ movptr(t, Address(rbp, 1284 frame::interpreter_frame_sender_sp_offset * 1285 wordSize)); // get sender sp 1286 __ leave(); // remove frame anchor 1287 __ pop(rdi); // get return address 1288 __ mov(rsp, t); // set sp to sender sp 1289 __ jmp(rdi); 1290 1291 if (inc_counter) { 1292 // Handle overflow of counter and compile method 1293 __ bind(invocation_counter_overflow); 1294 generate_counter_overflow(&continue_after_compile); 1295 } 1296 1297 return entry_point; 1298 } 1299 1300 // 1301 // Generic interpreted method entry to (asm) interpreter 1302 // 1303 address InterpreterGenerator::generate_normal_entry(bool synchronized) { 1304 // determine code generation flags 1305 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1306 1307 // ebx: Method* 1308 // r13: sender sp 1309 address entry_point = __ pc(); 1310 1311 const Address constMethod(rbx, Method::const_offset()); 1312 const Address access_flags(rbx, Method::access_flags_offset()); 1313 const Address size_of_parameters(rdx, 1314 ConstMethod::size_of_parameters_offset()); 1315 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset()); 1316 1317 1318 // get parameter size (always needed) 1319 __ movptr(rdx, constMethod); 1320 __ load_unsigned_short(rcx, size_of_parameters); 1321 1322 // rbx: Method* 1323 // rcx: size of parameters 1324 // r13: sender_sp (could differ from sp+wordSize if we were called via c2i ) 1325 1326 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words 1327 __ subl(rdx, rcx); // rdx = no. of additional locals 1328 1329 // YYY 1330 // __ incrementl(rdx); 1331 // __ andl(rdx, -2); 1332 1333 // see if we've got enough room on the stack for locals plus overhead. 1334 generate_stack_overflow_check(); 1335 1336 // get return address 1337 __ pop(rax); 1338 1339 // compute beginning of parameters (r14) 1340 __ lea(r14, Address(rsp, rcx, Address::times_8, -wordSize)); 1341 1342 // rdx - # of additional locals 1343 // allocate space for locals 1344 // explicitly initialize locals 1345 { 1346 Label exit, loop; 1347 __ testl(rdx, rdx); 1348 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 1349 __ bind(loop); 1350 __ push((int) NULL_WORD); // initialize local variables 1351 __ decrementl(rdx); // until everything initialized 1352 __ jcc(Assembler::greater, loop); 1353 __ bind(exit); 1354 } 1355 1356 // initialize fixed part of activation frame 1357 generate_fixed_frame(false); 1358 1359 // make sure method is not native & not abstract 1360 #ifdef ASSERT 1361 __ movl(rax, access_flags); 1362 { 1363 Label L; 1364 __ testl(rax, JVM_ACC_NATIVE); 1365 __ jcc(Assembler::zero, L); 1366 __ stop("tried to execute native method as non-native"); 1367 __ bind(L); 1368 } 1369 { 1370 Label L; 1371 __ testl(rax, JVM_ACC_ABSTRACT); 1372 __ jcc(Assembler::zero, L); 1373 __ stop("tried to execute abstract method in interpreter"); 1374 __ bind(L); 1375 } 1376 #endif 1377 1378 // Since at this point in the method invocation the exception 1379 // handler would try to exit the monitor of synchronized methods 1380 // which hasn't been entered yet, we set the thread local variable 1381 // _do_not_unlock_if_synchronized to true. The remove_activation 1382 // will check this flag. 1383 1384 const Address do_not_unlock_if_synchronized(r15_thread, 1385 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1386 __ movbool(do_not_unlock_if_synchronized, true); 1387 1388 __ profile_parameters_type(rax, rcx, rdx); 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 1469 // These should never be compiled since the interpreter will prefer 1470 // the compiled version to the intrinsic version. 1471 bool AbstractInterpreter::can_be_compiled(methodHandle m) { 1472 switch (method_kind(m)) { 1473 case Interpreter::java_lang_math_sin : // fall thru 1474 case Interpreter::java_lang_math_cos : // fall thru 1475 case Interpreter::java_lang_math_tan : // fall thru 1476 case Interpreter::java_lang_math_abs : // fall thru 1477 case Interpreter::java_lang_math_log : // fall thru 1478 case Interpreter::java_lang_math_log10 : // fall thru 1479 case Interpreter::java_lang_math_sqrt : // fall thru 1480 case Interpreter::java_lang_math_pow : // fall thru 1481 case Interpreter::java_lang_math_exp : 1482 return false; 1483 default: 1484 return true; 1485 } 1486 } 1487 1488 // How much stack a method activation needs in words. 1489 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { 1490 const int entry_size = frame::interpreter_frame_monitor_size(); 1491 1492 // total overhead size: entry_size + (saved rbp thru expr stack 1493 // bottom). be sure to change this if you add/subtract anything 1494 // to/from the overhead area 1495 const int overhead_size = 1496 -(frame::interpreter_frame_initial_sp_offset) + entry_size; 1497 1498 const int stub_code = frame::entry_frame_after_call_words; 1499 const int method_stack = (method->max_locals() + method->max_stack()) * 1500 Interpreter::stackElementWords; 1501 return (overhead_size + method_stack + stub_code); 1502 } 1503 1504 //----------------------------------------------------------------------------- 1505 // Exceptions 1506 1507 void TemplateInterpreterGenerator::generate_throw_exception() { 1508 // Entry point in previous activation (i.e., if the caller was 1509 // interpreted) 1510 Interpreter::_rethrow_exception_entry = __ pc(); 1511 // Restore sp to interpreter_frame_last_sp even though we are going 1512 // to empty the expression stack for the exception processing. 1513 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1514 // rax: exception 1515 // rdx: return address/pc that threw exception 1516 __ restore_bcp(); // r13 points to call/send 1517 __ restore_locals(); 1518 __ reinit_heapbase(); // restore r12 as heapbase. 1519 // Entry point for exceptions thrown within interpreter code 1520 Interpreter::_throw_exception_entry = __ pc(); 1521 // expression stack is undefined here 1522 // rax: exception 1523 // r13: exception bcp 1524 __ verify_oop(rax); 1525 __ mov(c_rarg1, rax); 1526 1527 // expression stack must be empty before entering the VM in case of 1528 // an exception 1529 __ empty_expression_stack(); 1530 // find exception handler address and preserve exception oop 1531 __ call_VM(rdx, 1532 CAST_FROM_FN_PTR(address, 1533 InterpreterRuntime::exception_handler_for_exception), 1534 c_rarg1); 1535 // rax: exception handler entry point 1536 // rdx: preserved exception oop 1537 // r13: bcp for exception handler 1538 __ push_ptr(rdx); // push exception which is now the only value on the stack 1539 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) 1540 1541 // If the exception is not handled in the current frame the frame is 1542 // removed and the exception is rethrown (i.e. exception 1543 // continuation is _rethrow_exception). 1544 // 1545 // Note: At this point the bci is still the bxi for the instruction 1546 // which caused the exception and the expression stack is 1547 // empty. Thus, for any VM calls at this point, GC will find a legal 1548 // oop map (with empty expression stack). 1549 1550 // In current activation 1551 // tos: exception 1552 // esi: exception bcp 1553 1554 // 1555 // JVMTI PopFrame support 1556 // 1557 1558 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1559 __ empty_expression_stack(); 1560 // Set the popframe_processing bit in pending_popframe_condition 1561 // indicating that we are currently handling popframe, so that 1562 // call_VMs that may happen later do not trigger new popframe 1563 // handling cycles. 1564 __ movl(rdx, Address(r15_thread, JavaThread::popframe_condition_offset())); 1565 __ orl(rdx, JavaThread::popframe_processing_bit); 1566 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), rdx); 1567 1568 { 1569 // Check to see whether we are returning to a deoptimized frame. 1570 // (The PopFrame call ensures that the caller of the popped frame is 1571 // either interpreted or compiled and deoptimizes it if compiled.) 1572 // In this case, we can't call dispatch_next() after the frame is 1573 // popped, but instead must save the incoming arguments and restore 1574 // them after deoptimization has occurred. 1575 // 1576 // Note that we don't compare the return PC against the 1577 // deoptimization blob's unpack entry because of the presence of 1578 // adapter frames in C2. 1579 Label caller_not_deoptimized; 1580 __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize)); 1581 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1582 InterpreterRuntime::interpreter_contains), c_rarg1); 1583 __ testl(rax, rax); 1584 __ jcc(Assembler::notZero, caller_not_deoptimized); 1585 1586 // Compute size of arguments for saving when returning to 1587 // deoptimized caller 1588 __ get_method(rax); 1589 __ movptr(rax, Address(rax, Method::const_offset())); 1590 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod:: 1591 size_of_parameters_offset()))); 1592 __ shll(rax, Interpreter::logStackElementSize); 1593 __ restore_locals(); // XXX do we need this? 1594 __ subptr(r14, rax); 1595 __ addptr(r14, wordSize); 1596 // Save these arguments 1597 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1598 Deoptimization:: 1599 popframe_preserve_args), 1600 r15_thread, rax, r14); 1601 1602 __ remove_activation(vtos, rdx, 1603 /* throw_monitor_exception */ false, 1604 /* install_monitor_exception */ false, 1605 /* notify_jvmdi */ false); 1606 1607 // Inform deoptimization that it is responsible for restoring 1608 // these arguments 1609 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), 1610 JavaThread::popframe_force_deopt_reexecution_bit); 1611 1612 // Continue in deoptimization handler 1613 __ jmp(rdx); 1614 1615 __ bind(caller_not_deoptimized); 1616 } 1617 1618 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */ 1619 /* throw_monitor_exception */ false, 1620 /* install_monitor_exception */ false, 1621 /* notify_jvmdi */ false); 1622 1623 // Finish with popframe handling 1624 // A previous I2C followed by a deoptimization might have moved the 1625 // outgoing arguments further up the stack. PopFrame expects the 1626 // mutations to those outgoing arguments to be preserved and other 1627 // constraints basically require this frame to look exactly as 1628 // though it had previously invoked an interpreted activation with 1629 // no space between the top of the expression stack (current 1630 // last_sp) and the top of stack. Rather than force deopt to 1631 // maintain this kind of invariant all the time we call a small 1632 // fixup routine to move the mutated arguments onto the top of our 1633 // expression stack if necessary. 1634 __ mov(c_rarg1, rsp); 1635 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1636 // PC must point into interpreter here 1637 __ set_last_Java_frame(noreg, rbp, __ pc()); 1638 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2); 1639 __ reset_last_Java_frame(true, true); 1640 // Restore the last_sp and null it out 1641 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1642 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1643 1644 __ restore_bcp(); // XXX do we need this? 1645 __ restore_locals(); // XXX do we need this? 1646 // The method data pointer was incremented already during 1647 // call profiling. We have to restore the mdp for the current bcp. 1648 if (ProfileInterpreter) { 1649 __ set_method_data_pointer_for_bcp(); 1650 } 1651 1652 // Clear the popframe condition flag 1653 __ movl(Address(r15_thread, JavaThread::popframe_condition_offset()), 1654 JavaThread::popframe_inactive); 1655 1656 #if INCLUDE_JVMTI 1657 { 1658 Label L_done; 1659 const Register local0 = r14; 1660 1661 __ cmpb(Address(r13, 0), Bytecodes::_invokestatic); 1662 __ jcc(Assembler::notEqual, L_done); 1663 1664 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. 1665 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. 1666 1667 __ get_method(rdx); 1668 __ movptr(rax, Address(local0, 0)); 1669 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, r13); 1670 1671 __ testptr(rax, rax); 1672 __ jcc(Assembler::zero, L_done); 1673 1674 __ movptr(Address(rbx, 0), rax); 1675 __ bind(L_done); 1676 } 1677 #endif // INCLUDE_JVMTI 1678 1679 __ dispatch_next(vtos); 1680 // end of PopFrame support 1681 1682 Interpreter::_remove_activation_entry = __ pc(); 1683 1684 // preserve exception over this code sequence 1685 __ pop_ptr(rax); 1686 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), rax); 1687 // remove the activation (without doing throws on illegalMonitorExceptions) 1688 __ remove_activation(vtos, rdx, false, true, false); 1689 // restore exception 1690 __ get_vm_result(rax, r15_thread); 1691 1692 // In between activations - previous activation type unknown yet 1693 // compute continuation point - the continuation point expects the 1694 // following registers set up: 1695 // 1696 // rax: exception 1697 // rdx: return address/pc that threw exception 1698 // rsp: expression stack of caller 1699 // rbp: ebp of caller 1700 __ push(rax); // save exception 1701 __ push(rdx); // save return address 1702 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1703 SharedRuntime::exception_handler_for_return_address), 1704 r15_thread, rdx); 1705 __ mov(rbx, rax); // save exception handler 1706 __ pop(rdx); // restore return address 1707 __ pop(rax); // restore exception 1708 // Note that an "issuing PC" is actually the next PC after the call 1709 __ jmp(rbx); // jump to exception 1710 // handler of caller 1711 } 1712 1713 1714 // 1715 // JVMTI ForceEarlyReturn support 1716 // 1717 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1718 address entry = __ pc(); 1719 1720 __ restore_bcp(); 1721 __ restore_locals(); 1722 __ empty_expression_stack(); 1723 __ load_earlyret_value(state); 1724 1725 __ movptr(rdx, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); 1726 Address cond_addr(rdx, JvmtiThreadState::earlyret_state_offset()); 1727 1728 // Clear the earlyret state 1729 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); 1730 1731 __ remove_activation(state, rsi, 1732 false, /* throw_monitor_exception */ 1733 false, /* install_monitor_exception */ 1734 true); /* notify_jvmdi */ 1735 __ jmp(rsi); 1736 1737 return entry; 1738 } // end of ForceEarlyReturn support 1739 1740 1741 //----------------------------------------------------------------------------- 1742 // Helper for vtos entry point generation 1743 1744 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 1745 address& bep, 1746 address& cep, 1747 address& sep, 1748 address& aep, 1749 address& iep, 1750 address& lep, 1751 address& fep, 1752 address& dep, 1753 address& vep) { 1754 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1755 Label L; 1756 aep = __ pc(); __ push_ptr(); __ jmp(L); 1757 fep = __ pc(); __ push_f(xmm0); __ jmp(L); 1758 dep = __ pc(); __ push_d(xmm0); __ jmp(L); 1759 lep = __ pc(); __ push_l(); __ jmp(L); 1760 bep = cep = sep = 1761 iep = __ pc(); __ push_i(); 1762 vep = __ pc(); 1763 __ bind(L); 1764 generate_and_dispatch(t); 1765 } 1766 1767 1768 //----------------------------------------------------------------------------- 1769 // Generation of individual instructions 1770 1771 // helpers for generate_and_dispatch 1772 1773 1774 InterpreterGenerator::InterpreterGenerator(StubQueue* code) 1775 : TemplateInterpreterGenerator(code) { 1776 generate_all(); // down here so it can be "virtual" 1777 } 1778 1779 //----------------------------------------------------------------------------- 1780 1781 // Non-product code 1782 #ifndef PRODUCT 1783 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1784 address entry = __ pc(); 1785 1786 __ push(state); 1787 __ push(c_rarg0); 1788 __ push(c_rarg1); 1789 __ push(c_rarg2); 1790 __ push(c_rarg3); 1791 __ mov(c_rarg2, rax); // Pass itos 1792 #ifdef _WIN64 1793 __ movflt(xmm3, xmm0); // Pass ftos 1794 #endif 1795 __ call_VM(noreg, 1796 CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), 1797 c_rarg1, c_rarg2, c_rarg3); 1798 __ pop(c_rarg3); 1799 __ pop(c_rarg2); 1800 __ pop(c_rarg1); 1801 __ pop(c_rarg0); 1802 __ pop(state); 1803 __ ret(0); // return from result handler 1804 1805 return entry; 1806 } 1807 1808 void TemplateInterpreterGenerator::count_bytecode() { 1809 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); 1810 } 1811 1812 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 1813 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); 1814 } 1815 1816 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 1817 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index)); 1818 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); 1819 __ orl(rbx, 1820 ((int) t->bytecode()) << 1821 BytecodePairHistogram::log2_number_of_codes); 1822 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); 1823 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters)); 1824 __ incrementl(Address(rscratch1, rbx, Address::times_4)); 1825 } 1826 1827 1828 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 1829 // Call a little run-time stub to avoid blow-up for each bytecode. 1830 // The run-time runtime saves the right registers, depending on 1831 // the tosca in-state for the given template. 1832 1833 assert(Interpreter::trace_code(t->tos_in()) != NULL, 1834 "entry must have been generated"); 1835 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1836 __ andptr(rsp, -16); // align stack as required by ABI 1837 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1838 __ mov(rsp, r12); // restore sp 1839 __ reinit_heapbase(); 1840 } 1841 1842 1843 void TemplateInterpreterGenerator::stop_interpreter_at() { 1844 Label L; 1845 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), 1846 StopInterpreterAt); 1847 __ jcc(Assembler::notEqual, L); 1848 __ int3(); 1849 __ bind(L); 1850 } 1851 #endif // !PRODUCT 1852 #endif // ! CC_INTERP