1 /* 2 * Copyright (c) 2003, 2025, 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 "asm/macroAssembler.hpp" 26 #include "classfile/javaClasses.hpp" 27 #include "compiler/compiler_globals.hpp" 28 #include "compiler/disassembler.hpp" 29 #include "gc/shared/barrierSetAssembler.hpp" 30 #include "interpreter/bytecodeHistogram.hpp" 31 #include "interpreter/interp_masm.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "interpreter/interpreterRuntime.hpp" 34 #include "interpreter/templateInterpreterGenerator.hpp" 35 #include "interpreter/templateTable.hpp" 36 #include "oops/arrayOop.hpp" 37 #include "oops/methodCounters.hpp" 38 #include "oops/methodData.hpp" 39 #include "oops/method.hpp" 40 #include "oops/oop.inline.hpp" 41 #include "oops/inlineKlass.hpp" 42 #include "oops/resolvedIndyEntry.hpp" 43 #include "oops/resolvedMethodEntry.hpp" 44 #include "prims/jvmtiExport.hpp" 45 #include "prims/jvmtiThreadState.hpp" 46 #include "runtime/continuation.hpp" 47 #include "runtime/deoptimization.hpp" 48 #include "runtime/frame.inline.hpp" 49 #include "runtime/globals.hpp" 50 #include "runtime/jniHandles.hpp" 51 #include "runtime/sharedRuntime.hpp" 52 #include "runtime/stubRoutines.hpp" 53 #include "runtime/synchronizer.hpp" 54 #include "runtime/timer.hpp" 55 #include "runtime/vframeArray.hpp" 56 #include "utilities/checkedCast.hpp" 57 #include "utilities/debug.hpp" 58 #include "utilities/macros.hpp" 59 60 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)-> 61 62 // Size of interpreter code. Increase if too small. Interpreter will 63 // fail with a guarantee ("not enough space for interpreter generation"); 64 // if too small. 65 // Run with +PrintInterpreter to get the VM to print out the size. 66 // Max size with JVMTI 67 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(280) NOT_JVMCI(268) * 1024; 68 69 // Global Register Names 70 static const Register rbcp = r13; 71 static const Register rlocals = r14; 72 73 const int method_offset = frame::interpreter_frame_method_offset * wordSize; 74 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize; 75 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; 76 77 78 //----------------------------------------------------------------------------- 79 80 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 81 address entry = __ pc(); 82 83 #ifdef ASSERT 84 { 85 Label L; 86 __ movptr(rax, Address(rbp, 87 frame::interpreter_frame_monitor_block_top_offset * 88 wordSize)); 89 __ lea(rax, Address(rbp, rax, Address::times_ptr)); 90 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack 91 // grows negative) 92 __ jcc(Assembler::aboveEqual, L); // check if frame is complete 93 __ stop ("interpreter frame not set up"); 94 __ bind(L); 95 } 96 #endif // ASSERT 97 // Restore bcp under the assumption that the current frame is still 98 // interpreted 99 __ restore_bcp(); 100 101 // expression stack must be empty before entering the VM if an 102 // exception happened 103 __ empty_expression_stack(); 104 // throw exception 105 __ call_VM(noreg, 106 CAST_FROM_FN_PTR(address, 107 InterpreterRuntime::throw_StackOverflowError)); 108 return entry; 109 } 110 111 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() { 112 address entry = __ pc(); 113 // The expression stack must be empty before entering the VM if an 114 // exception happened. 115 __ empty_expression_stack(); 116 117 // Setup parameters. 118 // ??? convention: expect aberrant index in register ebx/rbx. 119 // Pass array to create more detailed exceptions. 120 __ call_VM(noreg, 121 CAST_FROM_FN_PTR(address, 122 InterpreterRuntime:: 123 throw_ArrayIndexOutOfBoundsException), 124 c_rarg1, rbx); 125 return entry; 126 } 127 128 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 129 address entry = __ pc(); 130 131 // object is at TOS 132 __ pop(c_rarg1); 133 134 // expression stack must be empty before entering the VM if an 135 // exception happened 136 __ empty_expression_stack(); 137 138 __ call_VM(noreg, 139 CAST_FROM_FN_PTR(address, 140 InterpreterRuntime:: 141 throw_ClassCastException), 142 c_rarg1); 143 return entry; 144 } 145 146 address TemplateInterpreterGenerator::generate_exception_handler_common( 147 const char* name, const char* message, bool pass_oop) { 148 assert(!pass_oop || message == nullptr, "either oop or message but not both"); 149 address entry = __ pc(); 150 151 if (pass_oop) { 152 // object is at TOS 153 __ pop(c_rarg2); 154 } 155 // expression stack must be empty before entering the VM if an 156 // exception happened 157 __ empty_expression_stack(); 158 // setup parameters 159 __ lea(c_rarg1, ExternalAddress((address)name)); 160 if (pass_oop) { 161 __ call_VM(rax, CAST_FROM_FN_PTR(address, 162 InterpreterRuntime:: 163 create_klass_exception), 164 c_rarg1, c_rarg2); 165 } else { 166 __ lea(c_rarg2, ExternalAddress((address)message)); 167 __ call_VM(rax, 168 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 169 c_rarg1, c_rarg2); 170 } 171 // throw exception 172 __ jump(RuntimeAddress(Interpreter::throw_exception_entry())); 173 return entry; 174 } 175 176 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { 177 address entry = __ pc(); 178 179 // Restore stack bottom in case i2c adjusted stack 180 __ movptr(rscratch1, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 181 __ lea(rsp, Address(rbp, rscratch1, Address::times_ptr)); 182 // and null it as marker that esp is now tos until next java call 183 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 184 185 if (state == atos && InlineTypeReturnedAsFields) { 186 __ store_inline_type_fields_to_buf(nullptr); 187 } 188 189 __ restore_bcp(); 190 __ restore_locals(); 191 192 if (state == atos) { 193 Register mdp = rbx; 194 Register tmp = rcx; 195 __ profile_return_type(mdp, rax, tmp); 196 } 197 198 const Register cache = rbx; 199 const Register index = rcx; 200 if (index_size == sizeof(u4)) { 201 __ load_resolved_indy_entry(cache, index); 202 __ load_unsigned_short(cache, Address(cache, in_bytes(ResolvedIndyEntry::num_parameters_offset()))); 203 __ lea(rsp, Address(rsp, cache, Interpreter::stackElementScale())); 204 } else { 205 assert(index_size == sizeof(u2), "Can only be u2"); 206 __ load_method_entry(cache, index); 207 __ load_unsigned_short(cache, Address(cache, in_bytes(ResolvedMethodEntry::num_parameters_offset()))); 208 __ lea(rsp, Address(rsp, cache, Interpreter::stackElementScale())); 209 } 210 211 if (JvmtiExport::can_pop_frame()) { 212 __ check_and_handle_popframe(); 213 } 214 if (JvmtiExport::can_force_early_return()) { 215 __ check_and_handle_earlyret(); 216 } 217 218 __ dispatch_next(state, step); 219 220 return entry; 221 } 222 223 224 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) { 225 address entry = __ pc(); 226 227 // null last_sp until next java call 228 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 229 __ restore_bcp(); 230 __ restore_locals(); 231 const Register thread = r15_thread; 232 #if INCLUDE_JVMCI 233 // Check if we need to take lock at entry of synchronized method. This can 234 // only occur on method entry so emit it only for vtos with step 0. 235 if (EnableJVMCI && state == vtos && step == 0) { 236 Label L; 237 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 238 __ jcc(Assembler::zero, L); 239 // Clear flag. 240 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 241 // Satisfy calling convention for lock_method(). 242 __ get_method(rbx); 243 // Take lock. 244 lock_method(); 245 __ bind(L); 246 } else { 247 #ifdef ASSERT 248 if (EnableJVMCI) { 249 Label L; 250 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0); 251 __ jcc(Assembler::zero, L); 252 __ stop("unexpected pending monitor in deopt entry"); 253 __ bind(L); 254 } 255 #endif 256 } 257 #endif 258 // handle exceptions 259 { 260 Label L; 261 __ cmpptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD); 262 __ jcc(Assembler::zero, L); 263 __ call_VM(noreg, 264 CAST_FROM_FN_PTR(address, 265 InterpreterRuntime::throw_pending_exception)); 266 __ should_not_reach_here(); 267 __ bind(L); 268 } 269 if (continuation == nullptr) { 270 __ dispatch_next(state, step); 271 } else { 272 __ jump_to_entry(continuation); 273 } 274 return entry; 275 } 276 277 address TemplateInterpreterGenerator::generate_result_handler_for( 278 BasicType type) { 279 address entry = __ pc(); 280 switch (type) { 281 case T_BOOLEAN: __ c2bool(rax); break; 282 case T_CHAR : __ movzwl(rax, rax); break; 283 case T_BYTE : __ sign_extend_byte(rax); break; 284 case T_SHORT : __ sign_extend_short(rax); break; 285 case T_INT : /* nothing to do */ break; 286 case T_LONG : /* nothing to do */ break; 287 case T_VOID : /* nothing to do */ break; 288 case T_FLOAT : /* nothing to do */ break; 289 case T_DOUBLE : /* nothing to do */ break; 290 291 case T_OBJECT : 292 // retrieve result from frame 293 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); 294 // and verify it 295 __ verify_oop(rax); 296 break; 297 default : ShouldNotReachHere(); 298 } 299 __ ret(0); // return from result handler 300 return entry; 301 } 302 303 address TemplateInterpreterGenerator::generate_safept_entry_for( 304 TosState state, 305 address runtime_entry) { 306 address entry = __ pc(); 307 308 __ push(state); 309 __ push_cont_fastpath(); 310 __ call_VM(noreg, runtime_entry); 311 __ pop_cont_fastpath(); 312 313 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 314 return entry; 315 } 316 317 address TemplateInterpreterGenerator::generate_cont_resume_interpreter_adapter() { 318 if (!Continuations::enabled()) return nullptr; 319 address start = __ pc(); 320 321 __ restore_bcp(); 322 __ restore_locals(); 323 324 // Get return address before adjusting rsp 325 __ movptr(rax, Address(rsp, 0)); 326 327 // Restore stack bottom 328 __ movptr(rcx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 329 __ lea(rsp, Address(rbp, rcx, Address::times_ptr)); 330 // and null it as marker that esp is now tos until next java call 331 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 332 333 __ jmp(rax); 334 335 return start; 336 } 337 338 339 // Helpers for commoning out cases in the various type of method entries. 340 // 341 342 343 // increment invocation count & check for overflow 344 // 345 // Note: checking for negative value instead of overflow 346 // so we have a 'sticky' overflow test 347 // 348 // rbx: method 349 // rcx: invocation counter 350 // 351 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow) { 352 Label done; 353 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. 354 Label no_mdo; 355 if (ProfileInterpreter) { 356 // Are we profiling? 357 __ movptr(rax, Address(rbx, Method::method_data_offset())); 358 __ testptr(rax, rax); 359 __ jccb(Assembler::zero, no_mdo); 360 // Increment counter in the MDO 361 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) + 362 in_bytes(InvocationCounter::counter_offset())); 363 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset())); 364 __ increment_mask_and_jump(mdo_invocation_counter, mask, rcx, overflow); 365 __ jmp(done); 366 } 367 __ bind(no_mdo); 368 // Increment counter in MethodCounters 369 const Address invocation_counter(rax, 370 MethodCounters::invocation_counter_offset() + 371 InvocationCounter::counter_offset()); 372 __ get_method_counters(rbx, rax, done); 373 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset())); 374 __ increment_mask_and_jump(invocation_counter, mask, rcx, overflow); 375 __ bind(done); 376 } 377 378 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { 379 380 // Asm interpreter on entry 381 // r14/rdi - locals 382 // r13/rsi - bcp 383 // rbx - method 384 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE 385 // rbp - interpreter frame 386 387 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 388 // Everything as it was on entry 389 // rdx is not restored. Doesn't appear to really be set. 390 391 // InterpreterRuntime::frequency_counter_overflow takes two 392 // arguments, the first (thread) is passed by call_VM, the second 393 // indicates if the counter overflow occurs at a backwards branch 394 // (null bcp). We pass zero for it. The call returns the address 395 // of the verified entry point for the method or null if the 396 // compilation did not complete (either went background or bailed 397 // out). 398 __ movl(c_rarg1, 0); 399 __ call_VM(noreg, 400 CAST_FROM_FN_PTR(address, 401 InterpreterRuntime::frequency_counter_overflow), 402 c_rarg1); 403 404 __ movptr(rbx, Address(rbp, method_offset)); // restore Method* 405 // Preserve invariant that r13/r14 contain bcp/locals of sender frame 406 // and jump to the interpreted entry. 407 __ jmp(do_continue, relocInfo::none); 408 } 409 410 // See if we've got enough room on the stack for locals plus overhead below 411 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError 412 // without going through the signal handler, i.e., reserved and yellow zones 413 // will not be made usable. The shadow zone must suffice to handle the 414 // overflow. 415 // The expression stack grows down incrementally, so the normal guard 416 // page mechanism will work for that. 417 // 418 // NOTE: Since the additional locals are also always pushed (wasn't 419 // obvious in generate_fixed_frame) so the guard should work for them 420 // too. 421 // 422 // Args: 423 // rdx: number of additional locals this frame needs (what we must check) 424 // rbx: Method* 425 // 426 // Kills: 427 // rax 428 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) { 429 430 // monitor entry size: see picture of stack in frame_x86.hpp 431 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes(); 432 433 // total overhead size: entry_size + (saved rbp through expr stack 434 // bottom). be sure to change this if you add/subtract anything 435 // to/from the overhead area 436 const int overhead_size = 437 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; 438 439 const int page_size = (int)os::vm_page_size(); 440 441 Label after_frame_check; 442 443 // see if the frame is greater than one page in size. If so, 444 // then we need to verify there is enough stack space remaining 445 // for the additional locals. 446 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize); 447 __ jcc(Assembler::belowEqual, after_frame_check); 448 449 // compute rsp as if this were going to be the last frame on 450 // the stack before the red zone 451 452 Label after_frame_check_pop; 453 454 const Address stack_limit(r15_thread, JavaThread::stack_overflow_limit_offset()); 455 456 // locals + overhead, in bytes 457 __ mov(rax, rdx); 458 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes. 459 __ addptr(rax, overhead_size); 460 461 #ifdef ASSERT 462 Label limit_okay; 463 // Verify that thread stack overflow limit is non-zero. 464 __ cmpptr(stack_limit, NULL_WORD); 465 __ jcc(Assembler::notEqual, limit_okay); 466 __ stop("stack overflow limit is zero"); 467 __ bind(limit_okay); 468 #endif 469 470 // Add locals/frame size to stack limit. 471 __ addptr(rax, stack_limit); 472 473 // Check against the current stack bottom. 474 __ cmpptr(rsp, rax); 475 476 __ jcc(Assembler::above, after_frame_check_pop); 477 478 // Restore sender's sp as SP. This is necessary if the sender's 479 // frame is an extended compiled frame (see gen_c2i_adapter()) 480 // and safer anyway in case of JSR292 adaptations. 481 482 __ pop(rax); // return address must be moved if SP is changed 483 __ mov(rsp, rbcp); 484 __ push(rax); 485 486 // Note: the restored frame is not necessarily interpreted. 487 // Use the shared runtime version of the StackOverflowError. 488 assert(SharedRuntime::throw_StackOverflowError_entry() != nullptr, "stub not yet generated"); 489 __ jump(RuntimeAddress(SharedRuntime::throw_StackOverflowError_entry())); 490 // all done with frame size check 491 __ bind(after_frame_check_pop); 492 493 // all done with frame size check 494 __ bind(after_frame_check); 495 } 496 497 // Allocate monitor and lock method (asm interpreter) 498 // 499 // Args: 500 // rbx: Method* 501 // r14/rdi: locals 502 // 503 // Kills: 504 // rax 505 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) 506 // rscratch1, rscratch2 (scratch regs) 507 void TemplateInterpreterGenerator::lock_method() { 508 // synchronize method 509 const Address access_flags(rbx, Method::access_flags_offset()); 510 const Address monitor_block_top( 511 rbp, 512 frame::interpreter_frame_monitor_block_top_offset * wordSize); 513 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes(); 514 515 #ifdef ASSERT 516 { 517 Label L; 518 __ load_unsigned_short(rax, access_flags); 519 __ testl(rax, JVM_ACC_SYNCHRONIZED); 520 __ jcc(Assembler::notZero, L); 521 __ stop("method doesn't need synchronization"); 522 __ bind(L); 523 } 524 #endif // ASSERT 525 526 // get synchronization object 527 { 528 Label done; 529 __ load_unsigned_short(rax, access_flags); 530 __ testl(rax, JVM_ACC_STATIC); 531 // get receiver (assume this is frequent case) 532 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0))); 533 __ jcc(Assembler::zero, done); 534 __ load_mirror(rax, rbx, rscratch2); 535 536 #ifdef ASSERT 537 { 538 Label L; 539 __ testptr(rax, rax); 540 __ jcc(Assembler::notZero, L); 541 __ stop("synchronization object is null"); 542 __ bind(L); 543 } 544 #endif // ASSERT 545 546 __ bind(done); 547 } 548 549 // add space for monitor & lock 550 __ subptr(rsp, entry_size); // add space for a monitor entry 551 __ subptr(monitor_block_top, entry_size / wordSize); // set new monitor block top 552 // store object 553 __ movptr(Address(rsp, BasicObjectLock::obj_offset()), rax); 554 __ movptr(c_rarg1, rsp); // object address 555 __ lock_object(c_rarg1); 556 } 557 558 // Generate a fixed interpreter frame. This is identical setup for 559 // interpreted methods and for native methods hence the shared code. 560 // 561 // Args: 562 // rax: return address 563 // rbx: Method* 564 // r14/rdi: pointer to locals 565 // r13/rsi: sender sp 566 // rdx: cp cache 567 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 568 // initialize fixed part of activation frame 569 __ push(rax); // save return address 570 __ enter(); // save old & set new rbp 571 __ push(rbcp); // set sender sp 572 573 // Resolve ConstMethod* -> ConstantPool*. 574 // Get codebase, while we still have ConstMethod*. 575 // Save ConstantPool* in rax for later use. 576 __ movptr(rax, Address(rbx, Method::const_offset())); 577 __ lea(rbcp, Address(rax, ConstMethod::codes_offset())); 578 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); 579 580 __ push(NULL_WORD); // leave last_sp as null 581 __ push(rbx); // save Method* 582 583 // Get mirror and store it in the frame as GC root for this Method*. 584 // rax is still ConstantPool*, resolve ConstantPool* -> InstanceKlass* -> Java mirror. 585 __ movptr(rdx, Address(rax, ConstantPool::pool_holder_offset())); 586 __ movptr(rdx, Address(rdx, in_bytes(Klass::java_mirror_offset()))); 587 __ resolve_oop_handle(rdx, rscratch2); 588 __ push(rdx); 589 590 if (ProfileInterpreter) { 591 Label method_data_continue; 592 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset()))); 593 __ testptr(rdx, rdx); 594 __ jccb(Assembler::zero, method_data_continue); 595 __ addptr(rdx, in_bytes(MethodData::data_offset())); 596 __ bind(method_data_continue); 597 __ push(rdx); // set the mdp (method data pointer) 598 } else { 599 __ push(NULL_WORD); 600 } 601 602 // rax is still ConstantPool*, set the constant pool cache 603 __ movptr(rdx, Address(rax, ConstantPool::cache_offset())); 604 __ push(rdx); 605 606 __ movptr(rax, rlocals); 607 __ subptr(rax, rbp); 608 __ shrptr(rax, Interpreter::logStackElementSize); // rax = rlocals - fp(); 609 __ push(rax); // set relativized rlocals, see frame::interpreter_frame_locals() 610 611 if (native_call) { 612 __ push(NULL_WORD); // no bcp 613 } else { 614 __ push(rbcp); // set bcp 615 } 616 // initialize relativized pointer to expression stack bottom 617 __ push(frame::interpreter_frame_initial_sp_offset); 618 } 619 620 // End of helpers 621 622 // Method entry for java.lang.ref.Reference.get. 623 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { 624 // Code: _aload_0, _getfield, _areturn 625 // parameter size = 1 626 // 627 // The code that gets generated by this routine is split into 2 parts: 628 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load, 629 // 2. The slow path - which is an expansion of the regular method entry. 630 // 631 // Notes:- 632 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed. 633 // * We may jump to the slow path iff the receiver is null. If the 634 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load 635 // Thus we can use the regular method entry code to generate the NPE. 636 // 637 // rbx: Method* 638 639 // r13: senderSP must preserve for slow path, set SP to it on fast path 640 641 address entry = __ pc(); 642 643 const int referent_offset = java_lang_ref_Reference::referent_offset(); 644 645 Label slow_path; 646 // rbx: method 647 648 // Check if local 0 != null 649 // If the receiver is null then it is OK to jump to the slow path. 650 __ movptr(rax, Address(rsp, wordSize)); 651 652 __ testptr(rax, rax); 653 __ jcc(Assembler::zero, slow_path); 654 655 // rax: local 0 656 // rbx: method (but can be used as scratch now) 657 // rdx: scratch 658 // rdi: scratch 659 660 // Load the value of the referent field. 661 const Address field_address(rax, referent_offset); 662 __ load_heap_oop(rax, field_address, /*tmp1*/ rbx, ON_WEAK_OOP_REF); 663 664 // _areturn 665 __ pop(rdi); // get return address 666 __ mov(rsp, r13); // set sp to sender sp 667 __ jmp(rdi); 668 __ ret(0); 669 670 // generate a vanilla interpreter entry as the slow path 671 __ bind(slow_path); 672 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); 673 return entry; 674 } 675 676 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { 677 // See more discussion in stackOverflow.hpp. 678 679 // Note that we do the banging after the frame is setup, since the exception 680 // handling code expects to find a valid interpreter frame on the stack. 681 // Doing the banging earlier fails if the caller frame is not an interpreter 682 // frame. 683 // (Also, the exception throwing code expects to unlock any synchronized 684 // method receiver, so do the banging after locking the receiver.) 685 686 const int shadow_zone_size = checked_cast<int>(StackOverflow::stack_shadow_zone_size()); 687 const int page_size = (int)os::vm_page_size(); 688 const int n_shadow_pages = shadow_zone_size / page_size; 689 690 const Register thread = r15_thread; 691 692 #ifdef ASSERT 693 Label L_good_limit; 694 __ cmpptr(Address(thread, JavaThread::shadow_zone_safe_limit()), NULL_WORD); 695 __ jcc(Assembler::notEqual, L_good_limit); 696 __ stop("shadow zone safe limit is not initialized"); 697 __ bind(L_good_limit); 698 699 Label L_good_watermark; 700 __ cmpptr(Address(thread, JavaThread::shadow_zone_growth_watermark()), NULL_WORD); 701 __ jcc(Assembler::notEqual, L_good_watermark); 702 __ stop("shadow zone growth watermark is not initialized"); 703 __ bind(L_good_watermark); 704 #endif 705 706 Label L_done; 707 708 __ cmpptr(rsp, Address(thread, JavaThread::shadow_zone_growth_watermark())); 709 __ jcc(Assembler::above, L_done); 710 711 for (int p = 1; p <= n_shadow_pages; p++) { 712 __ bang_stack_with_offset(p*page_size); 713 } 714 715 // Record the new watermark, but only if update is above the safe limit. 716 // Otherwise, the next time around the check above would pass the safe limit. 717 __ cmpptr(rsp, Address(thread, JavaThread::shadow_zone_safe_limit())); 718 __ jccb(Assembler::belowEqual, L_done); 719 __ movptr(Address(thread, JavaThread::shadow_zone_growth_watermark()), rsp); 720 721 __ bind(L_done); 722 } 723 724 // Interpreter stub for calling a native method. (asm interpreter) 725 // This sets up a somewhat different looking stack for calling the 726 // native method than the typical interpreter frame setup. 727 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { 728 // determine code generation flags 729 bool inc_counter = UseCompiler || CountCompiledCalls; 730 731 // rbx: Method* 732 // rbcp: sender sp 733 734 address entry_point = __ pc(); 735 736 const Address constMethod (rbx, Method::const_offset()); 737 const Address access_flags (rbx, Method::access_flags_offset()); 738 const Address size_of_parameters(rcx, ConstMethod:: 739 size_of_parameters_offset()); 740 741 742 // get parameter size (always needed) 743 __ movptr(rcx, constMethod); 744 __ load_unsigned_short(rcx, size_of_parameters); 745 746 // native calls don't need the stack size check since they have no 747 // expression stack and the arguments are already on the stack and 748 // we only add a handful of words to the stack 749 750 // rbx: Method* 751 // rcx: size of parameters 752 // rbcp: sender sp 753 __ pop(rax); // get return address 754 755 // for natives the size of locals is zero 756 757 // compute beginning of parameters 758 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 759 760 // add 2 zero-initialized slots for native calls 761 // initialize result_handler slot 762 __ push(NULL_WORD); 763 // slot for oop temp 764 // (static native method holder mirror/jni oop result) 765 __ push(NULL_WORD); 766 767 // initialize fixed part of activation frame 768 generate_fixed_frame(true); 769 770 // make sure method is native & not abstract 771 #ifdef ASSERT 772 __ load_unsigned_short(rax, access_flags); 773 { 774 Label L; 775 __ testl(rax, JVM_ACC_NATIVE); 776 __ jcc(Assembler::notZero, L); 777 __ stop("tried to execute non-native method as native"); 778 __ bind(L); 779 } 780 { 781 Label L; 782 __ testl(rax, JVM_ACC_ABSTRACT); 783 __ jcc(Assembler::zero, L); 784 __ stop("tried to execute abstract method in interpreter"); 785 __ bind(L); 786 } 787 #endif 788 789 // Since at this point in the method invocation the exception handler 790 // would try to exit the monitor of synchronized methods which hasn't 791 // been entered yet, we set the thread local variable 792 // _do_not_unlock_if_synchronized to true. The remove_activation will 793 // check this flag. 794 795 const Address do_not_unlock_if_synchronized(r15_thread, 796 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 797 __ movbool(do_not_unlock_if_synchronized, true); 798 799 // increment invocation count & check for overflow 800 Label invocation_counter_overflow; 801 if (inc_counter) { 802 generate_counter_incr(&invocation_counter_overflow); 803 } 804 805 Label continue_after_compile; 806 __ bind(continue_after_compile); 807 808 bang_stack_shadow_pages(true); 809 810 // reset the _do_not_unlock_if_synchronized flag 811 __ movbool(do_not_unlock_if_synchronized, false); 812 813 // check for synchronized methods 814 // Must happen AFTER invocation_counter check and stack overflow check, 815 // so method is not locked if overflows. 816 if (synchronized) { 817 lock_method(); 818 } else { 819 // no synchronization necessary 820 #ifdef ASSERT 821 { 822 Label L; 823 __ load_unsigned_short(rax, access_flags); 824 __ testl(rax, JVM_ACC_SYNCHRONIZED); 825 __ jcc(Assembler::zero, L); 826 __ stop("method needs synchronization"); 827 __ bind(L); 828 } 829 #endif 830 } 831 832 // start execution 833 #ifdef ASSERT 834 { 835 Label L; 836 const Address monitor_block_top(rbp, 837 frame::interpreter_frame_monitor_block_top_offset * wordSize); 838 __ movptr(rax, monitor_block_top); 839 __ lea(rax, Address(rbp, rax, Address::times_ptr)); 840 __ cmpptr(rax, rsp); 841 __ jcc(Assembler::equal, L); 842 __ stop("broken stack frame setup in interpreter 5"); 843 __ bind(L); 844 } 845 #endif 846 847 // jvmti support 848 __ notify_method_entry(); 849 850 // work registers 851 const Register method = rbx; 852 const Register thread = r15_thread; 853 const Register t = r11; 854 855 // allocate space for parameters 856 __ get_method(method); 857 __ movptr(t, Address(method, Method::const_offset())); 858 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); 859 860 __ shll(t, Interpreter::logStackElementSize); 861 862 __ subptr(rsp, t); 863 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 864 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) 865 866 // get signature handler 867 { 868 Label L; 869 __ movptr(t, Address(method, Method::signature_handler_offset())); 870 __ testptr(t, t); 871 __ jcc(Assembler::notZero, L); 872 __ call_VM(noreg, 873 CAST_FROM_FN_PTR(address, 874 InterpreterRuntime::prepare_native_call), 875 method); 876 __ get_method(method); 877 __ movptr(t, Address(method, Method::signature_handler_offset())); 878 __ bind(L); 879 } 880 881 // call signature handler 882 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals, 883 "adjust this code"); 884 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp, 885 "adjust this code"); 886 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1, 887 "adjust this code"); 888 889 // The generated handlers do not touch RBX (the method). 890 // However, large signatures cannot be cached and are generated 891 // each time here. The slow-path generator can do a GC on return, 892 // so we must reload it after the call. 893 __ call(t); 894 __ get_method(method); // slow path can do a GC, reload RBX 895 896 897 // result handler is in rax 898 // set result handler 899 __ movptr(Address(rbp, 900 (frame::interpreter_frame_result_handler_offset) * wordSize), 901 rax); 902 903 // pass mirror handle if static call 904 { 905 Label L; 906 __ load_unsigned_short(t, Address(method, Method::access_flags_offset())); 907 __ testl(t, JVM_ACC_STATIC); 908 __ jcc(Assembler::zero, L); 909 // get mirror 910 __ load_mirror(t, method, rax); 911 // copy mirror into activation frame 912 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), 913 t); 914 // pass handle to mirror 915 __ lea(c_rarg1, 916 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 917 __ bind(L); 918 } 919 920 // get native function entry point 921 { 922 Label L; 923 __ movptr(rax, Address(method, Method::native_function_offset())); 924 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 925 __ cmpptr(rax, unsatisfied.addr(), rscratch1); 926 __ jcc(Assembler::notEqual, L); 927 __ call_VM(noreg, 928 CAST_FROM_FN_PTR(address, 929 InterpreterRuntime::prepare_native_call), 930 method); 931 __ get_method(method); 932 __ movptr(rax, Address(method, Method::native_function_offset())); 933 __ bind(L); 934 } 935 936 // pass JNIEnv 937 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset())); 938 939 // It is enough that the pc() points into the right code 940 // segment. It does not have to be the correct return pc. 941 // For convenience we use the pc we want to resume to in 942 // case of preemption on Object.wait. 943 Label native_return; 944 __ set_last_Java_frame(rsp, rbp, native_return, rscratch1); 945 946 // change thread state 947 #ifdef ASSERT 948 { 949 Label L; 950 __ movl(t, Address(thread, JavaThread::thread_state_offset())); 951 __ cmpl(t, _thread_in_Java); 952 __ jcc(Assembler::equal, L); 953 __ stop("Wrong thread state in native stub"); 954 __ bind(L); 955 } 956 #endif 957 958 // Change state to native 959 960 __ movl(Address(thread, JavaThread::thread_state_offset()), 961 _thread_in_native); 962 963 __ push_cont_fastpath(); 964 965 // Call the native method. 966 __ call(rax); 967 // 32: result potentially in rdx:rax or ST0 968 // 64: result potentially in rax or xmm0 969 970 __ pop_cont_fastpath(); 971 972 // Verify or restore cpu control state after JNI call 973 __ restore_cpu_control_state_after_jni(rscratch1); 974 975 // NOTE: The order of these pushes is known to frame::interpreter_frame_result 976 // in order to extract the result of a method call. If the order of these 977 // pushes change or anything else is added to the stack then the code in 978 // interpreter_frame_result must also change. 979 980 __ push(dtos); 981 __ push(ltos); 982 983 // change thread state 984 __ movl(Address(thread, JavaThread::thread_state_offset()), 985 _thread_in_native_trans); 986 987 // Force this write out before the read below 988 if (!UseSystemMemoryBarrier) { 989 __ membar(Assembler::Membar_mask_bits( 990 Assembler::LoadLoad | Assembler::LoadStore | 991 Assembler::StoreLoad | Assembler::StoreStore)); 992 } 993 994 // check for safepoint operation in progress and/or pending suspend requests 995 { 996 Label Continue; 997 Label slow_path; 998 999 __ safepoint_poll(slow_path, true /* at_return */, false /* in_nmethod */); 1000 1001 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); 1002 __ jcc(Assembler::equal, Continue); 1003 __ bind(slow_path); 1004 1005 // Don't use call_VM as it will see a possible pending exception 1006 // and forward it and never return here preventing us from 1007 // clearing _last_native_pc down below. Also can't use 1008 // call_VM_leaf either as it will check to see if r13 & r14 are 1009 // preserved and correspond to the bcp/locals pointers. So we do a 1010 // runtime call by hand. 1011 // 1012 __ mov(c_rarg0, r15_thread); 1013 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1014 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1015 __ andptr(rsp, -16); // align stack as required by ABI 1016 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); 1017 __ mov(rsp, r12); // restore sp 1018 __ reinit_heapbase(); 1019 __ bind(Continue); 1020 } 1021 1022 // change thread state 1023 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); 1024 1025 if (LockingMode != LM_LEGACY) { 1026 // Check preemption for Object.wait() 1027 Label not_preempted; 1028 __ movptr(rscratch1, Address(r15_thread, JavaThread::preempt_alternate_return_offset())); 1029 __ cmpptr(rscratch1, NULL_WORD); 1030 __ jccb(Assembler::equal, not_preempted); 1031 __ movptr(Address(r15_thread, JavaThread::preempt_alternate_return_offset()), NULL_WORD); 1032 __ jmp(rscratch1); 1033 __ bind(native_return); 1034 __ restore_after_resume(true /* is_native */); 1035 __ bind(not_preempted); 1036 } else { 1037 // any pc will do so just use this one for LM_LEGACY to keep code together. 1038 __ bind(native_return); 1039 } 1040 1041 // reset_last_Java_frame 1042 __ reset_last_Java_frame(true); 1043 1044 if (CheckJNICalls) { 1045 // clear_pending_jni_exception_check 1046 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD); 1047 } 1048 1049 // reset handle block 1050 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); 1051 __ movl(Address(t, JNIHandleBlock::top_offset()), NULL_WORD); 1052 1053 // If result is an oop unbox and store it in frame where gc will see it 1054 // and result handler will pick it up 1055 1056 { 1057 Label no_oop; 1058 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); 1059 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); 1060 __ jcc(Assembler::notEqual, no_oop); 1061 // retrieve result 1062 __ pop(ltos); 1063 // Unbox oop result, e.g. JNIHandles::resolve value. 1064 __ resolve_jobject(rax /* value */, 1065 t /* tmp */); 1066 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax); 1067 // keep stack depth as expected by pushing oop which will eventually be discarded 1068 __ push(ltos); 1069 __ bind(no_oop); 1070 } 1071 1072 1073 { 1074 Label no_reguard; 1075 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), 1076 StackOverflow::stack_guard_yellow_reserved_disabled); 1077 __ jcc(Assembler::notEqual, no_reguard); 1078 1079 __ pusha(); // XXX only save smashed registers 1080 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1081 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1082 __ andptr(rsp, -16); // align stack as required by ABI 1083 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1084 __ mov(rsp, r12); // restore sp 1085 __ popa(); // XXX only restore smashed registers 1086 __ reinit_heapbase(); 1087 1088 __ bind(no_reguard); 1089 } 1090 1091 1092 // The method register is junk from after the thread_in_native transition 1093 // until here. Also can't call_VM until the bcp has been 1094 // restored. Need bcp for throwing exception below so get it now. 1095 __ get_method(method); 1096 1097 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base() 1098 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod* 1099 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase 1100 1101 // handle exceptions (exception handling will handle unlocking!) 1102 { 1103 Label L; 1104 __ cmpptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD); 1105 __ jcc(Assembler::zero, L); 1106 // Note: At some point we may want to unify this with the code 1107 // used in call_VM_base(); i.e., we should use the 1108 // StubRoutines::forward_exception code. For now this doesn't work 1109 // here because the rsp is not correctly set at this point. 1110 __ MacroAssembler::call_VM(noreg, 1111 CAST_FROM_FN_PTR(address, 1112 InterpreterRuntime::throw_pending_exception)); 1113 __ should_not_reach_here(); 1114 __ bind(L); 1115 } 1116 1117 // do unlocking if necessary 1118 { 1119 Label L; 1120 __ load_unsigned_short(t, Address(method, Method::access_flags_offset())); 1121 __ testl(t, JVM_ACC_SYNCHRONIZED); 1122 __ jcc(Assembler::zero, L); 1123 // the code below should be shared with interpreter macro 1124 // assembler implementation 1125 { 1126 Label unlock; 1127 // BasicObjectLock will be first in list, since this is a 1128 // synchronized method. However, need to check that the object 1129 // has not been unlocked by an explicit monitorexit bytecode. 1130 const Address monitor(rbp, 1131 (intptr_t)(frame::interpreter_frame_initial_sp_offset * 1132 wordSize - (int)sizeof(BasicObjectLock))); 1133 1134 const Register regmon = c_rarg1; 1135 1136 // monitor expect in c_rarg1 for slow unlock path 1137 __ lea(regmon, monitor); // address of first monitor 1138 1139 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset())); 1140 __ testptr(t, t); 1141 __ jcc(Assembler::notZero, unlock); 1142 1143 // Entry already unlocked, need to throw exception 1144 __ MacroAssembler::call_VM(noreg, 1145 CAST_FROM_FN_PTR(address, 1146 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1147 __ should_not_reach_here(); 1148 1149 __ bind(unlock); 1150 __ unlock_object(regmon); 1151 } 1152 __ bind(L); 1153 } 1154 1155 // jvmti support 1156 // Note: This must happen _after_ handling/throwing any exceptions since 1157 // the exception handler code notifies the runtime of method exits 1158 // too. If this happens before, method entry/exit notifications are 1159 // not properly paired (was bug - gri 11/22/99). 1160 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1161 1162 // restore potential result in edx:eax, call result handler to 1163 // restore potential result in ST0 & handle result 1164 1165 __ pop(ltos); 1166 __ pop(dtos); 1167 1168 __ movptr(t, Address(rbp, 1169 (frame::interpreter_frame_result_handler_offset) * wordSize)); 1170 __ call(t); 1171 1172 // remove activation 1173 __ movptr(t, Address(rbp, 1174 frame::interpreter_frame_sender_sp_offset * 1175 wordSize)); // get sender sp 1176 __ leave(); // remove frame anchor 1177 __ pop(rdi); // get return address 1178 __ mov(rsp, t); // set sp to sender sp 1179 __ jmp(rdi); 1180 1181 if (inc_counter) { 1182 // Handle overflow of counter and compile method 1183 __ bind(invocation_counter_overflow); 1184 generate_counter_overflow(continue_after_compile); 1185 } 1186 1187 return entry_point; 1188 } 1189 1190 // Abstract method entry 1191 // Attempt to execute abstract method. Throw exception 1192 address TemplateInterpreterGenerator::generate_abstract_entry(void) { 1193 1194 address entry_point = __ pc(); 1195 1196 // abstract method entry 1197 1198 // pop return address, reset last_sp to null 1199 __ empty_expression_stack(); 1200 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed) 1201 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 1202 1203 // throw exception 1204 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), rbx); 1205 // the call_VM checks for exception, so we should never return here. 1206 __ should_not_reach_here(); 1207 1208 return entry_point; 1209 } 1210 1211 // 1212 // Generic interpreted method entry to (asm) interpreter 1213 // 1214 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { 1215 // determine code generation flags 1216 bool inc_counter = UseCompiler || CountCompiledCalls; 1217 1218 // ebx: Method* 1219 // rbcp: sender sp (set in InterpreterMacroAssembler::prepare_to_jump_from_interpreted / generate_call_stub) 1220 address entry_point = __ pc(); 1221 1222 const Address constMethod(rbx, Method::const_offset()); 1223 const Address access_flags(rbx, Method::access_flags_offset()); 1224 const Address size_of_parameters(rdx, 1225 ConstMethod::size_of_parameters_offset()); 1226 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset()); 1227 1228 1229 // get parameter size (always needed) 1230 __ movptr(rdx, constMethod); 1231 __ load_unsigned_short(rcx, size_of_parameters); 1232 1233 // rbx: Method* 1234 // rcx: size of parameters 1235 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i ) 1236 1237 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words 1238 __ subl(rdx, rcx); // rdx = no. of additional locals 1239 1240 // YYY 1241 // __ incrementl(rdx); 1242 // __ andl(rdx, -2); 1243 1244 // see if we've got enough room on the stack for locals plus overhead. 1245 generate_stack_overflow_check(); 1246 1247 // get return address 1248 __ pop(rax); 1249 1250 // compute beginning of parameters 1251 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 1252 1253 // rdx - # of additional locals 1254 // allocate space for locals 1255 // explicitly initialize locals 1256 { 1257 Label exit, loop; 1258 __ testl(rdx, rdx); 1259 __ jccb(Assembler::lessEqual, exit); // do nothing if rdx <= 0 1260 __ bind(loop); 1261 __ push(NULL_WORD); // initialize local variables 1262 __ decrementl(rdx); // until everything initialized 1263 __ jccb(Assembler::greater, loop); 1264 __ bind(exit); 1265 } 1266 1267 // initialize fixed part of activation frame 1268 generate_fixed_frame(false); 1269 1270 // make sure method is not native & not abstract 1271 #ifdef ASSERT 1272 __ load_unsigned_short(rax, access_flags); 1273 { 1274 Label L; 1275 __ testl(rax, JVM_ACC_NATIVE); 1276 __ jcc(Assembler::zero, L); 1277 __ stop("tried to execute native method as non-native"); 1278 __ bind(L); 1279 } 1280 { 1281 Label L; 1282 __ testl(rax, JVM_ACC_ABSTRACT); 1283 __ jcc(Assembler::zero, L); 1284 __ stop("tried to execute abstract method in interpreter"); 1285 __ bind(L); 1286 } 1287 #endif 1288 1289 // Since at this point in the method invocation the exception 1290 // handler would try to exit the monitor of synchronized methods 1291 // which hasn't been entered yet, we set the thread local variable 1292 // _do_not_unlock_if_synchronized to true. The remove_activation 1293 // will check this flag. 1294 1295 const Address do_not_unlock_if_synchronized(r15_thread, 1296 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1297 __ movbool(do_not_unlock_if_synchronized, true); 1298 1299 __ profile_parameters_type(rax, rcx, rdx); 1300 // increment invocation count & check for overflow 1301 Label invocation_counter_overflow; 1302 if (inc_counter) { 1303 generate_counter_incr(&invocation_counter_overflow); 1304 } 1305 1306 Label continue_after_compile; 1307 __ bind(continue_after_compile); 1308 1309 // check for synchronized interpreted methods 1310 bang_stack_shadow_pages(false); 1311 1312 // reset the _do_not_unlock_if_synchronized flag 1313 __ movbool(do_not_unlock_if_synchronized, false); 1314 1315 // check for synchronized methods 1316 // Must happen AFTER invocation_counter check and stack overflow check, 1317 // so method is not locked if overflows. 1318 if (synchronized) { 1319 // Allocate monitor and lock method 1320 lock_method(); 1321 } else { 1322 // no synchronization necessary 1323 #ifdef ASSERT 1324 { 1325 Label L; 1326 __ load_unsigned_short(rax, access_flags); 1327 __ testl(rax, JVM_ACC_SYNCHRONIZED); 1328 __ jcc(Assembler::zero, L); 1329 __ stop("method needs synchronization"); 1330 __ bind(L); 1331 } 1332 #endif 1333 } 1334 1335 // start execution 1336 #ifdef ASSERT 1337 { 1338 Label L; 1339 const Address monitor_block_top (rbp, 1340 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1341 __ movptr(rax, monitor_block_top); 1342 __ lea(rax, Address(rbp, rax, Address::times_ptr)); 1343 __ cmpptr(rax, rsp); 1344 __ jcc(Assembler::equal, L); 1345 __ stop("broken stack frame setup in interpreter 6"); 1346 __ bind(L); 1347 } 1348 #endif 1349 1350 // jvmti support 1351 __ notify_method_entry(); 1352 1353 __ dispatch_next(vtos); 1354 1355 // invocation counter overflow 1356 if (inc_counter) { 1357 // Handle overflow of counter and compile method 1358 __ bind(invocation_counter_overflow); 1359 generate_counter_overflow(continue_after_compile); 1360 } 1361 1362 return entry_point; 1363 } 1364 1365 //----------------------------------------------------------------------------- 1366 // Exceptions 1367 1368 void TemplateInterpreterGenerator::generate_throw_exception() { 1369 // Entry point in previous activation (i.e., if the caller was 1370 // interpreted) 1371 Interpreter::_rethrow_exception_entry = __ pc(); 1372 // Restore sp to interpreter_frame_last_sp even though we are going 1373 // to empty the expression stack for the exception processing. 1374 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 1375 // rax: exception 1376 // rdx: return address/pc that threw exception 1377 __ restore_bcp(); // r13/rsi points to call/send 1378 __ restore_locals(); 1379 __ reinit_heapbase(); // restore r12 as heapbase. 1380 // Entry point for exceptions thrown within interpreter code 1381 Interpreter::_throw_exception_entry = __ pc(); 1382 // expression stack is undefined here 1383 // rax: exception 1384 // r13/rsi: exception bcp 1385 __ verify_oop(rax); 1386 __ mov(c_rarg1, rax); 1387 1388 // expression stack must be empty before entering the VM in case of 1389 // an exception 1390 __ empty_expression_stack(); 1391 // find exception handler address and preserve exception oop 1392 __ call_VM(rdx, 1393 CAST_FROM_FN_PTR(address, 1394 InterpreterRuntime::exception_handler_for_exception), 1395 c_rarg1); 1396 // rax: exception handler entry point 1397 // rdx: preserved exception oop 1398 // r13/rsi: bcp for exception handler 1399 __ push_ptr(rdx); // push exception which is now the only value on the stack 1400 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) 1401 1402 // If the exception is not handled in the current frame the frame is 1403 // removed and the exception is rethrown (i.e. exception 1404 // continuation is _rethrow_exception). 1405 // 1406 // Note: At this point the bci is still the bxi for the instruction 1407 // which caused the exception and the expression stack is 1408 // empty. Thus, for any VM calls at this point, GC will find a legal 1409 // oop map (with empty expression stack). 1410 1411 // In current activation 1412 // tos: exception 1413 // esi: exception bcp 1414 1415 // 1416 // JVMTI PopFrame support 1417 // 1418 1419 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1420 __ empty_expression_stack(); 1421 // Set the popframe_processing bit in pending_popframe_condition 1422 // indicating that we are currently handling popframe, so that 1423 // call_VMs that may happen later do not trigger new popframe 1424 // handling cycles. 1425 const Register thread = r15_thread; 1426 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset())); 1427 __ orl(rdx, JavaThread::popframe_processing_bit); 1428 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx); 1429 1430 { 1431 // Check to see whether we are returning to a deoptimized frame. 1432 // (The PopFrame call ensures that the caller of the popped frame is 1433 // either interpreted or compiled and deoptimizes it if compiled.) 1434 // In this case, we can't call dispatch_next() after the frame is 1435 // popped, but instead must save the incoming arguments and restore 1436 // them after deoptimization has occurred. 1437 // 1438 // Note that we don't compare the return PC against the 1439 // deoptimization blob's unpack entry because of the presence of 1440 // adapter frames in C2. 1441 Label caller_not_deoptimized; 1442 __ movptr(c_rarg1, Address(rbp, frame::return_addr_offset * wordSize)); 1443 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1444 InterpreterRuntime::interpreter_contains), c_rarg1); 1445 __ testl(rax, rax); 1446 __ jcc(Assembler::notZero, caller_not_deoptimized); 1447 1448 // Compute size of arguments for saving when returning to 1449 // deoptimized caller 1450 __ get_method(rax); 1451 __ movptr(rax, Address(rax, Method::const_offset())); 1452 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod:: 1453 size_of_parameters_offset()))); 1454 __ shll(rax, Interpreter::logStackElementSize); 1455 __ restore_locals(); 1456 __ subptr(rlocals, rax); 1457 __ addptr(rlocals, wordSize); 1458 // Save these arguments 1459 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1460 Deoptimization:: 1461 popframe_preserve_args), 1462 thread, rax, rlocals); 1463 1464 __ remove_activation(vtos, rdx, 1465 /* throw_monitor_exception */ false, 1466 /* install_monitor_exception */ false, 1467 /* notify_jvmdi */ false); 1468 1469 // Inform deoptimization that it is responsible for restoring 1470 // these arguments 1471 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1472 JavaThread::popframe_force_deopt_reexecution_bit); 1473 1474 // Continue in deoptimization handler 1475 __ jmp(rdx); 1476 1477 __ bind(caller_not_deoptimized); 1478 } 1479 1480 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */ 1481 /* throw_monitor_exception */ false, 1482 /* install_monitor_exception */ false, 1483 /* notify_jvmdi */ false); 1484 1485 // Finish with popframe handling 1486 // A previous I2C followed by a deoptimization might have moved the 1487 // outgoing arguments further up the stack. PopFrame expects the 1488 // mutations to those outgoing arguments to be preserved and other 1489 // constraints basically require this frame to look exactly as 1490 // though it had previously invoked an interpreted activation with 1491 // no space between the top of the expression stack (current 1492 // last_sp) and the top of stack. Rather than force deopt to 1493 // maintain this kind of invariant all the time we call a small 1494 // fixup routine to move the mutated arguments onto the top of our 1495 // expression stack if necessary. 1496 __ mov(c_rarg1, rsp); 1497 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1498 __ lea(c_rarg2, Address(rbp, c_rarg2, Address::times_ptr)); 1499 // PC must point into interpreter here 1500 __ set_last_Java_frame(noreg, rbp, __ pc(), rscratch1); 1501 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2); 1502 __ reset_last_Java_frame(true); 1503 1504 // Restore the last_sp and null it out 1505 __ movptr(rcx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1506 __ lea(rsp, Address(rbp, rcx, Address::times_ptr)); 1507 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 1508 1509 __ restore_bcp(); 1510 __ restore_locals(); 1511 // The method data pointer was incremented already during 1512 // call profiling. We have to restore the mdp for the current bcp. 1513 if (ProfileInterpreter) { 1514 __ set_method_data_pointer_for_bcp(); 1515 } 1516 1517 // Clear the popframe condition flag 1518 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1519 JavaThread::popframe_inactive); 1520 1521 #if INCLUDE_JVMTI 1522 { 1523 Label L_done; 1524 const Register local0 = rlocals; 1525 1526 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic); 1527 __ jcc(Assembler::notEqual, L_done); 1528 1529 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. 1530 // Detect such a case in the InterpreterRuntime function and return the member name argument, or null. 1531 1532 __ get_method(rdx); 1533 __ movptr(rax, Address(local0, 0)); 1534 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp); 1535 1536 __ testptr(rax, rax); 1537 __ jcc(Assembler::zero, L_done); 1538 1539 __ movptr(Address(rbx, 0), rax); 1540 __ bind(L_done); 1541 } 1542 #endif // INCLUDE_JVMTI 1543 1544 __ dispatch_next(vtos); 1545 // end of PopFrame support 1546 1547 Interpreter::_remove_activation_entry = __ pc(); 1548 1549 // preserve exception over this code sequence 1550 __ pop_ptr(rax); 1551 __ movptr(Address(thread, JavaThread::vm_result_oop_offset()), rax); 1552 // remove the activation (without doing throws on illegalMonitorExceptions) 1553 __ remove_activation(vtos, rdx, false, true, false); 1554 // restore exception 1555 __ get_vm_result_oop(rax); 1556 1557 // In between activations - previous activation type unknown yet 1558 // compute continuation point - the continuation point expects the 1559 // following registers set up: 1560 // 1561 // rax: exception 1562 // rdx: return address/pc that threw exception 1563 // rsp: expression stack of caller 1564 // rbp: ebp of caller 1565 __ push(rax); // save exception 1566 __ push(rdx); // save return address 1567 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1568 SharedRuntime::exception_handler_for_return_address), 1569 thread, rdx); 1570 __ mov(rbx, rax); // save exception handler 1571 __ pop(rdx); // restore return address 1572 __ pop(rax); // restore exception 1573 // Note that an "issuing PC" is actually the next PC after the call 1574 __ jmp(rbx); // jump to exception 1575 // handler of caller 1576 } 1577 1578 1579 // 1580 // JVMTI ForceEarlyReturn support 1581 // 1582 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1583 address entry = __ pc(); 1584 1585 __ restore_bcp(); 1586 __ restore_locals(); 1587 __ empty_expression_stack(); 1588 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse 1589 1590 __ movptr(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); 1591 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset()); 1592 1593 // Clear the earlyret state 1594 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); 1595 1596 __ remove_activation(state, rsi, 1597 false, /* throw_monitor_exception */ 1598 false, /* install_monitor_exception */ 1599 true); /* notify_jvmdi */ 1600 __ jmp(rsi); 1601 1602 return entry; 1603 } // end of ForceEarlyReturn support 1604 1605 1606 //----------------------------------------------------------------------------- 1607 // Helper for vtos entry point generation 1608 1609 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 1610 address& bep, 1611 address& cep, 1612 address& sep, 1613 address& aep, 1614 address& iep, 1615 address& lep, 1616 address& fep, 1617 address& dep, 1618 address& vep) { 1619 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1620 Label L; 1621 fep = __ pc(); // ftos entry point 1622 __ push_f(xmm0); 1623 __ jmpb(L); 1624 dep = __ pc(); // dtos entry point 1625 __ push_d(xmm0); 1626 __ jmpb(L); 1627 lep = __ pc(); // ltos entry point 1628 __ push_l(); 1629 __ jmpb(L); 1630 aep = bep = cep = sep = iep = __ pc(); // [abcsi]tos entry point 1631 __ push_i_or_ptr(); 1632 vep = __ pc(); // vtos entry point 1633 __ bind(L); 1634 generate_and_dispatch(t); 1635 } 1636 1637 //----------------------------------------------------------------------------- 1638 1639 // Non-product code 1640 #ifndef PRODUCT 1641 1642 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1643 address entry = __ pc(); 1644 1645 __ push(state); 1646 __ push(c_rarg0); 1647 __ push(c_rarg1); 1648 __ push(c_rarg2); 1649 __ push(c_rarg3); 1650 __ mov(c_rarg2, rax); // Pass itos 1651 #ifdef _WIN64 1652 __ movflt(xmm3, xmm0); // Pass ftos 1653 #endif 1654 __ call_VM(noreg, 1655 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), 1656 c_rarg1, c_rarg2, c_rarg3); 1657 __ pop(c_rarg3); 1658 __ pop(c_rarg2); 1659 __ pop(c_rarg1); 1660 __ pop(c_rarg0); 1661 __ pop(state); 1662 __ ret(0); // return from result handler 1663 1664 return entry; 1665 } 1666 1667 void TemplateInterpreterGenerator::count_bytecode() { 1668 __ incrementq(ExternalAddress((address) &BytecodeCounter::_counter_value), rscratch1); 1669 } 1670 1671 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 1672 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]), rscratch1); 1673 } 1674 1675 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 1676 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index)); 1677 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); 1678 __ orl(rbx, 1679 ((int) t->bytecode()) << 1680 BytecodePairHistogram::log2_number_of_codes); 1681 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx, rscratch1); 1682 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters)); 1683 __ incrementl(Address(rscratch1, rbx, Address::times_4)); 1684 } 1685 1686 1687 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 1688 // Call a little run-time stub to avoid blow-up for each bytecode. 1689 // The run-time runtime saves the right registers, depending on 1690 // the tosca in-state for the given template. 1691 1692 assert(Interpreter::trace_code(t->tos_in()) != nullptr, 1693 "entry must have been generated"); 1694 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1695 __ andptr(rsp, -16); // align stack as required by ABI 1696 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1697 __ mov(rsp, r12); // restore sp 1698 __ reinit_heapbase(); 1699 } 1700 1701 1702 void TemplateInterpreterGenerator::stop_interpreter_at() { 1703 Label L; 1704 __ mov64(rscratch1, StopInterpreterAt); 1705 __ cmp64(rscratch1, ExternalAddress((address) &BytecodeCounter::_counter_value), rscratch2); 1706 __ jcc(Assembler::notEqual, L); 1707 __ int3(); 1708 __ bind(L); 1709 } 1710 #endif // !PRODUCT