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 // Global Register Names 55 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi); 56 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi); 57 58 const int method_offset = frame::interpreter_frame_method_offset * wordSize; 59 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize; 60 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; 61 62 //----------------------------------------------------------------------------- 63 64 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 65 address entry = __ pc(); 66 67 #ifdef ASSERT 68 { 69 Label L; 70 __ lea(rax, Address(rbp, 71 frame::interpreter_frame_monitor_block_top_offset * 72 wordSize)); 73 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack 74 // grows negative) 75 __ jcc(Assembler::aboveEqual, L); // check if frame is complete 76 __ stop ("interpreter frame not set up"); 77 __ bind(L); 78 } 79 #endif // ASSERT 80 // Restore bcp under the assumption that the current frame is still 81 // interpreted 82 __ restore_bcp(); 83 84 // expression stack must be empty before entering the VM if an 85 // exception happened 86 __ empty_expression_stack(); 87 // throw exception 88 __ call_VM(noreg, 89 CAST_FROM_FN_PTR(address, 90 InterpreterRuntime::throw_StackOverflowError)); 91 return entry; 92 } 93 94 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler( 95 const char* name) { 96 address entry = __ pc(); 97 // expression stack must be empty before entering the VM if an 98 // exception happened 99 __ empty_expression_stack(); 100 // setup parameters 101 // ??? convention: expect aberrant index in register ebx 102 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 103 __ lea(rarg, ExternalAddress((address)name)); 104 __ call_VM(noreg, 105 CAST_FROM_FN_PTR(address, 106 InterpreterRuntime:: 107 throw_ArrayIndexOutOfBoundsException), 108 rarg, rbx); 109 return entry; 110 } 111 112 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 113 address entry = __ pc(); 114 115 // object is at TOS 116 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 117 __ pop(rarg); 118 119 // expression stack must be empty before entering the VM if an 120 // exception happened 121 __ empty_expression_stack(); 122 123 __ call_VM(noreg, 124 CAST_FROM_FN_PTR(address, 125 InterpreterRuntime:: 126 throw_ClassCastException), 127 rarg); 128 return entry; 129 } 130 131 address TemplateInterpreterGenerator::generate_exception_handler_common( 132 const char* name, const char* message, bool pass_oop) { 133 assert(!pass_oop || message == NULL, "either oop or message but not both"); 134 address entry = __ pc(); 135 136 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 137 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2); 138 139 if (pass_oop) { 140 // object is at TOS 141 __ pop(rarg2); 142 } 143 // expression stack must be empty before entering the VM if an 144 // exception happened 145 __ empty_expression_stack(); 146 // setup parameters 147 __ lea(rarg, ExternalAddress((address)name)); 148 if (pass_oop) { 149 __ call_VM(rax, CAST_FROM_FN_PTR(address, 150 InterpreterRuntime:: 151 create_klass_exception), 152 rarg, rarg2); 153 } else { 154 // kind of lame ExternalAddress can't take NULL because 155 // external_word_Relocation will assert. 156 if (message != NULL) { 157 __ lea(rarg2, ExternalAddress((address)message)); 158 } else { 159 __ movptr(rarg2, NULL_WORD); 160 } 161 __ call_VM(rax, 162 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 163 rarg, rarg2); 164 } 165 // throw exception 166 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 167 return entry; 168 } 169 170 171 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { 172 address entry = __ pc(); 173 // NULL last_sp until next java call 174 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 175 __ dispatch_next(state); 176 return entry; 177 } 178 179 180 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { 181 address entry = __ pc(); 182 183 #ifndef _LP64 184 #ifdef COMPILER2 185 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases 186 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) { 187 for (int i = 1; i < 8; i++) { 188 __ ffree(i); 189 } 190 } else if (UseSSE < 2) { 191 __ empty_FPU_stack(); 192 } 193 #endif // COMPILER2 194 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) { 195 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled"); 196 } else { 197 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled"); 198 } 199 200 if (state == ftos) { 201 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter"); 202 } else if (state == dtos) { 203 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter"); 204 } 205 #endif // _LP64 206 207 // Restore stack bottom in case i2c adjusted stack 208 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 209 // and NULL it as marker that esp is now tos until next java call 210 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 211 212 __ restore_bcp(); 213 __ restore_locals(); 214 215 if (state == atos) { 216 Register mdp = rbx; 217 Register tmp = rcx; 218 __ profile_return_type(mdp, rax, tmp); 219 } 220 221 const Register cache = rbx; 222 const Register index = rcx; 223 __ get_cache_and_index_at_bcp(cache, index, 1, index_size); 224 225 const Register flags = cache; 226 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); 227 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask); 228 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale())); 229 __ dispatch_next(state, step); 230 231 return entry; 232 } 233 234 235 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { 236 address entry = __ pc(); 237 238 #ifndef _LP64 239 if (state == ftos) { 240 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter"); 241 } else if (state == dtos) { 242 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter"); 243 } 244 #endif // _LP64 245 246 // NULL last_sp until next java call 247 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 248 __ restore_bcp(); 249 __ restore_locals(); 250 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 251 NOT_LP64(__ get_thread(thread)); 252 #if INCLUDE_JVMCI 253 // Check if we need to take lock at entry of synchronized method. 254 if (UseJVMCICompiler) { 255 Label L; 256 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 257 __ jcc(Assembler::zero, L); 258 // Clear flag. 259 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 260 // Satisfy calling convention for lock_method(). 261 __ get_method(rbx); 262 // Take lock. 263 lock_method(); 264 __ bind(L); 265 } 266 #endif 267 // handle exceptions 268 { 269 Label L; 270 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 271 __ jcc(Assembler::zero, L); 272 __ call_VM(noreg, 273 CAST_FROM_FN_PTR(address, 274 InterpreterRuntime::throw_pending_exception)); 275 __ should_not_reach_here(); 276 __ bind(L); 277 } 278 __ dispatch_next(state, step); 279 return entry; 280 } 281 282 address TemplateInterpreterGenerator::generate_result_handler_for( 283 BasicType type) { 284 address entry = __ pc(); 285 switch (type) { 286 case T_BOOLEAN: __ c2bool(rax); break; 287 #ifndef _LP64 288 case T_CHAR : __ andptr(rax, 0xFFFF); break; 289 #else 290 case T_CHAR : __ movzwl(rax, rax); break; 291 #endif // _LP64 292 case T_BYTE : __ sign_extend_byte(rax); break; 293 case T_SHORT : __ sign_extend_short(rax); break; 294 case T_INT : /* nothing to do */ break; 295 case T_LONG : /* nothing to do */ break; 296 case T_VOID : /* nothing to do */ break; 297 #ifndef _LP64 298 case T_DOUBLE : 299 case T_FLOAT : 300 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); 301 __ pop(t); // remove return address first 302 // Must return a result for interpreter or compiler. In SSE 303 // mode, results are returned in xmm0 and the FPU stack must 304 // be empty. 305 if (type == T_FLOAT && UseSSE >= 1) { 306 // Load ST0 307 __ fld_d(Address(rsp, 0)); 308 // Store as float and empty fpu stack 309 __ fstp_s(Address(rsp, 0)); 310 // and reload 311 __ movflt(xmm0, Address(rsp, 0)); 312 } else if (type == T_DOUBLE && UseSSE >= 2 ) { 313 __ movdbl(xmm0, Address(rsp, 0)); 314 } else { 315 // restore ST0 316 __ fld_d(Address(rsp, 0)); 317 } 318 // and pop the temp 319 __ addptr(rsp, 2 * wordSize); 320 __ push(t); // restore return address 321 } 322 break; 323 #else 324 case T_FLOAT : /* nothing to do */ break; 325 case T_DOUBLE : /* nothing to do */ break; 326 #endif // _LP64 327 328 case T_OBJECT : 329 // retrieve result from frame 330 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); 331 // and verify it 332 __ verify_oop(rax); 333 break; 334 default : ShouldNotReachHere(); 335 } 336 __ ret(0); // return from result handler 337 return entry; 338 } 339 340 address TemplateInterpreterGenerator::generate_safept_entry_for( 341 TosState state, 342 address runtime_entry) { 343 address entry = __ pc(); 344 __ push(state); 345 __ call_VM(noreg, runtime_entry); 346 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 347 return entry; 348 } 349 350 351 352 // Helpers for commoning out cases in the various type of method entries. 353 // 354 355 356 // increment invocation count & check for overflow 357 // 358 // Note: checking for negative value instead of overflow 359 // so we have a 'sticky' overflow test 360 // 361 // rbx: method 362 // rcx: invocation counter 363 // 364 void InterpreterGenerator::generate_counter_incr( 365 Label* overflow, 366 Label* profile_method, 367 Label* profile_method_continue) { 368 Label done; 369 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. 370 if (TieredCompilation) { 371 int increment = InvocationCounter::count_increment; 372 Label no_mdo; 373 if (ProfileInterpreter) { 374 // Are we profiling? 375 __ movptr(rax, Address(rbx, Method::method_data_offset())); 376 __ testptr(rax, rax); 377 __ jccb(Assembler::zero, no_mdo); 378 // Increment counter in the MDO 379 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) + 380 in_bytes(InvocationCounter::counter_offset())); 381 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset())); 382 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); 383 __ jmp(done); 384 } 385 __ bind(no_mdo); 386 // Increment counter in MethodCounters 387 const Address invocation_counter(rax, 388 MethodCounters::invocation_counter_offset() + 389 InvocationCounter::counter_offset()); 390 __ get_method_counters(rbx, rax, done); 391 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset())); 392 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, 393 false, Assembler::zero, overflow); 394 __ bind(done); 395 } else { // not TieredCompilation 396 const Address backedge_counter(rax, 397 MethodCounters::backedge_counter_offset() + 398 InvocationCounter::counter_offset()); 399 const Address invocation_counter(rax, 400 MethodCounters::invocation_counter_offset() + 401 InvocationCounter::counter_offset()); 402 403 __ get_method_counters(rbx, rax, done); 404 405 if (ProfileInterpreter) { 406 __ incrementl(Address(rax, 407 MethodCounters::interpreter_invocation_counter_offset())); 408 } 409 // Update standard invocation counters 410 __ movl(rcx, invocation_counter); 411 __ incrementl(rcx, InvocationCounter::count_increment); 412 __ movl(invocation_counter, rcx); // save invocation count 413 414 __ movl(rax, backedge_counter); // load backedge counter 415 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits 416 417 __ addl(rcx, rax); // add both counters 418 419 // profile_method is non-null only for interpreted method so 420 // profile_method != NULL == !native_call 421 422 if (ProfileInterpreter && profile_method != NULL) { 423 // Test to see if we should create a method data oop 424 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 425 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 426 __ jcc(Assembler::less, *profile_method_continue); 427 428 // if no method data exists, go to profile_method 429 __ test_method_data_pointer(rax, *profile_method); 430 } 431 432 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 433 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset()))); 434 __ jcc(Assembler::aboveEqual, *overflow); 435 __ bind(done); 436 } 437 } 438 439 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { 440 441 // Asm interpreter on entry 442 // r14/rdi - locals 443 // r13/rsi - bcp 444 // rbx - method 445 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE 446 // rbp - interpreter frame 447 448 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 449 // Everything as it was on entry 450 // rdx is not restored. Doesn't appear to really be set. 451 452 // InterpreterRuntime::frequency_counter_overflow takes two 453 // arguments, the first (thread) is passed by call_VM, the second 454 // indicates if the counter overflow occurs at a backwards branch 455 // (NULL bcp). We pass zero for it. The call returns the address 456 // of the verified entry point for the method or NULL if the 457 // compilation did not complete (either went background or bailed 458 // out). 459 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 460 __ movl(rarg, 0); 461 __ call_VM(noreg, 462 CAST_FROM_FN_PTR(address, 463 InterpreterRuntime::frequency_counter_overflow), 464 rarg); 465 466 __ movptr(rbx, Address(rbp, method_offset)); // restore Method* 467 // Preserve invariant that r13/r14 contain bcp/locals of sender frame 468 // and jump to the interpreted entry. 469 __ jmp(*do_continue, relocInfo::none); 470 } 471 472 // See if we've got enough room on the stack for locals plus overhead. 473 // The expression stack grows down incrementally, so the normal guard 474 // page mechanism will work for that. 475 // 476 // NOTE: Since the additional locals are also always pushed (wasn't 477 // obvious in generate_fixed_frame) so the guard should work for them 478 // too. 479 // 480 // Args: 481 // rdx: number of additional locals this frame needs (what we must check) 482 // rbx: Method* 483 // 484 // Kills: 485 // rax 486 void InterpreterGenerator::generate_stack_overflow_check(void) { 487 488 // monitor entry size: see picture of stack in frame_x86.hpp 489 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 490 491 // total overhead size: entry_size + (saved rbp through expr stack 492 // bottom). be sure to change this if you add/subtract anything 493 // to/from the overhead area 494 const int overhead_size = 495 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; 496 497 const int page_size = os::vm_page_size(); 498 499 Label after_frame_check; 500 501 // see if the frame is greater than one page in size. If so, 502 // then we need to verify there is enough stack space remaining 503 // for the additional locals. 504 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize); 505 __ jcc(Assembler::belowEqual, after_frame_check); 506 507 // compute rsp as if this were going to be the last frame on 508 // the stack before the red zone 509 510 Label after_frame_check_pop; 511 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 512 #ifndef _LP64 513 __ push(thread); 514 __ get_thread(thread); 515 #endif 516 517 const Address stack_base(thread, Thread::stack_base_offset()); 518 const Address stack_size(thread, Thread::stack_size_offset()); 519 520 // locals + overhead, in bytes 521 __ mov(rax, rdx); 522 __ shlptr(rax, Interpreter::logStackElementSize); // 2 slots per parameter. 523 __ addptr(rax, overhead_size); 524 525 #ifdef ASSERT 526 Label stack_base_okay, stack_size_okay; 527 // verify that thread stack base is non-zero 528 __ cmpptr(stack_base, (int32_t)NULL_WORD); 529 __ jcc(Assembler::notEqual, stack_base_okay); 530 __ stop("stack base is zero"); 531 __ bind(stack_base_okay); 532 // verify that thread stack size is non-zero 533 __ cmpptr(stack_size, 0); 534 __ jcc(Assembler::notEqual, stack_size_okay); 535 __ stop("stack size is zero"); 536 __ bind(stack_size_okay); 537 #endif 538 539 // Add stack base to locals and subtract stack size 540 __ addptr(rax, stack_base); 541 __ subptr(rax, stack_size); 542 543 // Use the maximum number of pages we might bang. 544 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages+StackReservedPages) ? StackShadowPages : 545 (StackRedPages+StackYellowPages+StackReservedPages); 546 547 // add in the red and yellow zone sizes 548 __ addptr(rax, max_pages * page_size); 549 550 // check against the current stack bottom 551 __ cmpptr(rsp, rax); 552 553 __ jcc(Assembler::above, after_frame_check_pop); 554 NOT_LP64(__ pop(rsi)); // get saved bcp 555 556 // Restore sender's sp as SP. This is necessary if the sender's 557 // frame is an extended compiled frame (see gen_c2i_adapter()) 558 // and safer anyway in case of JSR292 adaptations. 559 560 __ pop(rax); // return address must be moved if SP is changed 561 __ mov(rsp, rbcp); 562 __ push(rax); 563 564 // Note: the restored frame is not necessarily interpreted. 565 // Use the shared runtime version of the StackOverflowError. 566 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 567 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry())); 568 // all done with frame size check 569 __ bind(after_frame_check_pop); 570 NOT_LP64(__ pop(rsi)); 571 572 // all done with frame size check 573 __ bind(after_frame_check); 574 } 575 576 // Allocate monitor and lock method (asm interpreter) 577 // 578 // Args: 579 // rbx: Method* 580 // r14/rdi: locals 581 // 582 // Kills: 583 // rax 584 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) 585 // rscratch1, rscratch2 (scratch regs) 586 void TemplateInterpreterGenerator::lock_method() { 587 // synchronize method 588 const Address access_flags(rbx, Method::access_flags_offset()); 589 const Address monitor_block_top( 590 rbp, 591 frame::interpreter_frame_monitor_block_top_offset * wordSize); 592 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 593 594 #ifdef ASSERT 595 { 596 Label L; 597 __ movl(rax, access_flags); 598 __ testl(rax, JVM_ACC_SYNCHRONIZED); 599 __ jcc(Assembler::notZero, L); 600 __ stop("method doesn't need synchronization"); 601 __ bind(L); 602 } 603 #endif // ASSERT 604 605 // get synchronization object 606 { 607 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 608 Label done; 609 __ movl(rax, access_flags); 610 __ testl(rax, JVM_ACC_STATIC); 611 // get receiver (assume this is frequent case) 612 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0))); 613 __ jcc(Assembler::zero, done); 614 __ movptr(rax, Address(rbx, Method::const_offset())); 615 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); 616 __ movptr(rax, Address(rax, 617 ConstantPool::pool_holder_offset_in_bytes())); 618 __ movptr(rax, Address(rax, mirror_offset)); 619 620 #ifdef ASSERT 621 { 622 Label L; 623 __ testptr(rax, rax); 624 __ jcc(Assembler::notZero, L); 625 __ stop("synchronization object is NULL"); 626 __ bind(L); 627 } 628 #endif // ASSERT 629 630 __ bind(done); 631 } 632 633 // add space for monitor & lock 634 __ subptr(rsp, entry_size); // add space for a monitor entry 635 __ movptr(monitor_block_top, rsp); // set new monitor block top 636 // store object 637 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); 638 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 639 __ movptr(lockreg, rsp); // object address 640 __ lock_object(lockreg); 641 } 642 643 // Generate a fixed interpreter frame. This is identical setup for 644 // interpreted methods and for native methods hence the shared code. 645 // 646 // Args: 647 // rax: return address 648 // rbx: Method* 649 // r14/rdi: pointer to locals 650 // r13/rsi: sender sp 651 // rdx: cp cache 652 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 653 // initialize fixed part of activation frame 654 __ push(rax); // save return address 655 __ enter(); // save old & set new rbp 656 __ push(rbcp); // set sender sp 657 __ push((int)NULL_WORD); // leave last_sp as null 658 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod* 659 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase 660 __ push(rbx); // save Method* 661 if (ProfileInterpreter) { 662 Label method_data_continue; 663 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset()))); 664 __ testptr(rdx, rdx); 665 __ jcc(Assembler::zero, method_data_continue); 666 __ addptr(rdx, in_bytes(MethodData::data_offset())); 667 __ bind(method_data_continue); 668 __ push(rdx); // set the mdp (method data pointer) 669 } else { 670 __ push(0); 671 } 672 673 __ movptr(rdx, Address(rbx, Method::const_offset())); 674 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); 675 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); 676 __ push(rdx); // set constant pool cache 677 __ push(rlocals); // set locals pointer 678 if (native_call) { 679 __ push(0); // no bcp 680 } else { 681 __ push(rbcp); // set bcp 682 } 683 __ push(0); // reserve word for pointer to expression stack bottom 684 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom 685 } 686 687 // End of helpers 688 689 // Method entry for java.lang.ref.Reference.get. 690 address InterpreterGenerator::generate_Reference_get_entry(void) { 691 #if INCLUDE_ALL_GCS 692 // Code: _aload_0, _getfield, _areturn 693 // parameter size = 1 694 // 695 // The code that gets generated by this routine is split into 2 parts: 696 // 1. The "intrinsified" code for G1 (or any SATB based GC), 697 // 2. The slow path - which is an expansion of the regular method entry. 698 // 699 // Notes:- 700 // * In the G1 code we do not check whether we need to block for 701 // a safepoint. If G1 is enabled then we must execute the specialized 702 // code for Reference.get (except when the Reference object is null) 703 // so that we can log the value in the referent field with an SATB 704 // update buffer. 705 // If the code for the getfield template is modified so that the 706 // G1 pre-barrier code is executed when the current method is 707 // Reference.get() then going through the normal method entry 708 // will be fine. 709 // * The G1 code can, however, check the receiver object (the instance 710 // of java.lang.Reference) and jump to the slow path if null. If the 711 // Reference object is null then we obviously cannot fetch the referent 712 // and so we don't need to call the G1 pre-barrier. Thus we can use the 713 // regular method entry code to generate the NPE. 714 // 715 // rbx: Method* 716 717 // r13: senderSP must preserve for slow path, set SP to it on fast path 718 719 address entry = __ pc(); 720 721 const int referent_offset = java_lang_ref_Reference::referent_offset; 722 guarantee(referent_offset > 0, "referent offset not initialized"); 723 724 if (UseG1GC) { 725 Label slow_path; 726 // rbx: method 727 728 // Check if local 0 != NULL 729 // If the receiver is null then it is OK to jump to the slow path. 730 __ movptr(rax, Address(rsp, wordSize)); 731 732 __ testptr(rax, rax); 733 __ jcc(Assembler::zero, slow_path); 734 735 // rax: local 0 736 // rbx: method (but can be used as scratch now) 737 // rdx: scratch 738 // rdi: scratch 739 740 // Preserve the sender sp in case the pre-barrier 741 // calls the runtime 742 NOT_LP64(__ push(rsi)); 743 744 // Generate the G1 pre-barrier code to log the value of 745 // the referent field in an SATB buffer. 746 747 // Load the value of the referent field. 748 const Address field_address(rax, referent_offset); 749 __ load_heap_oop(rax, field_address); 750 751 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13); 752 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 753 NOT_LP64(__ get_thread(thread)); 754 755 // Generate the G1 pre-barrier code to log the value of 756 // the referent field in an SATB buffer. 757 __ g1_write_barrier_pre(noreg /* obj */, 758 rax /* pre_val */, 759 thread /* thread */, 760 rbx /* tmp */, 761 true /* tosca_live */, 762 true /* expand_call */); 763 764 // _areturn 765 NOT_LP64(__ pop(rsi)); // get sender sp 766 __ pop(rdi); // get return address 767 __ mov(rsp, sender_sp); // set sp to sender sp 768 __ jmp(rdi); 769 __ ret(0); 770 771 // generate a vanilla interpreter entry as the slow path 772 __ bind(slow_path); 773 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); 774 return entry; 775 } 776 #endif // INCLUDE_ALL_GCS 777 778 // If G1 is not enabled then attempt to go through the accessor entry point 779 // Reference.get is an accessor 780 return NULL; 781 } 782 783 // Interpreter stub for calling a native method. (asm interpreter) 784 // This sets up a somewhat different looking stack for calling the 785 // native method than the typical interpreter frame setup. 786 address InterpreterGenerator::generate_native_entry(bool synchronized) { 787 // determine code generation flags 788 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 789 790 // rbx: Method* 791 // rbcp: sender sp 792 793 address entry_point = __ pc(); 794 795 const Address constMethod (rbx, Method::const_offset()); 796 const Address access_flags (rbx, Method::access_flags_offset()); 797 const Address size_of_parameters(rcx, ConstMethod:: 798 size_of_parameters_offset()); 799 800 801 // get parameter size (always needed) 802 __ movptr(rcx, constMethod); 803 __ load_unsigned_short(rcx, size_of_parameters); 804 805 // native calls don't need the stack size check since they have no 806 // expression stack and the arguments are already on the stack and 807 // we only add a handful of words to the stack 808 809 // rbx: Method* 810 // rcx: size of parameters 811 // rbcp: sender sp 812 __ pop(rax); // get return address 813 814 // for natives the size of locals is zero 815 816 // compute beginning of parameters 817 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 818 819 // add 2 zero-initialized slots for native calls 820 // initialize result_handler slot 821 __ push((int) NULL_WORD); 822 // slot for oop temp 823 // (static native method holder mirror/jni oop result) 824 __ push((int) NULL_WORD); 825 826 // initialize fixed part of activation frame 827 generate_fixed_frame(true); 828 829 // make sure method is native & not abstract 830 #ifdef ASSERT 831 __ movl(rax, access_flags); 832 { 833 Label L; 834 __ testl(rax, JVM_ACC_NATIVE); 835 __ jcc(Assembler::notZero, L); 836 __ stop("tried to execute non-native method as native"); 837 __ bind(L); 838 } 839 { 840 Label L; 841 __ testl(rax, JVM_ACC_ABSTRACT); 842 __ jcc(Assembler::zero, L); 843 __ stop("tried to execute abstract method in interpreter"); 844 __ bind(L); 845 } 846 #endif 847 848 // Since at this point in the method invocation the exception handler 849 // would try to exit the monitor of synchronized methods which hasn't 850 // been entered yet, we set the thread local variable 851 // _do_not_unlock_if_synchronized to true. The remove_activation will 852 // check this flag. 853 854 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread); 855 NOT_LP64(__ get_thread(thread1)); 856 const Address do_not_unlock_if_synchronized(thread1, 857 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 858 __ movbool(do_not_unlock_if_synchronized, true); 859 860 // increment invocation count & check for overflow 861 Label invocation_counter_overflow; 862 if (inc_counter) { 863 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 864 } 865 866 Label continue_after_compile; 867 __ bind(continue_after_compile); 868 869 bang_stack_shadow_pages(true); 870 871 // reset the _do_not_unlock_if_synchronized flag 872 NOT_LP64(__ get_thread(thread1)); 873 __ movbool(do_not_unlock_if_synchronized, false); 874 875 // check for synchronized methods 876 // Must happen AFTER invocation_counter check and stack overflow check, 877 // so method is not locked if overflows. 878 if (synchronized) { 879 lock_method(); 880 } else { 881 // no synchronization necessary 882 #ifdef ASSERT 883 { 884 Label L; 885 __ movl(rax, access_flags); 886 __ testl(rax, JVM_ACC_SYNCHRONIZED); 887 __ jcc(Assembler::zero, L); 888 __ stop("method needs synchronization"); 889 __ bind(L); 890 } 891 #endif 892 } 893 894 // start execution 895 #ifdef ASSERT 896 { 897 Label L; 898 const Address monitor_block_top(rbp, 899 frame::interpreter_frame_monitor_block_top_offset * wordSize); 900 __ movptr(rax, monitor_block_top); 901 __ cmpptr(rax, rsp); 902 __ jcc(Assembler::equal, L); 903 __ stop("broken stack frame setup in interpreter"); 904 __ bind(L); 905 } 906 #endif 907 908 // jvmti support 909 __ notify_method_entry(); 910 911 // work registers 912 const Register method = rbx; 913 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread); 914 const Register t = NOT_LP64(rcx) LP64_ONLY(r11); 915 916 // allocate space for parameters 917 __ get_method(method); 918 __ movptr(t, Address(method, Method::const_offset())); 919 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); 920 921 #ifndef _LP64 922 __ shlptr(t, Interpreter::logStackElementSize); 923 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror 924 __ subptr(rsp, t); 925 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics 926 #else 927 __ shll(t, Interpreter::logStackElementSize); 928 929 __ subptr(rsp, t); 930 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 931 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) 932 #endif // _LP64 933 934 // get signature handler 935 { 936 Label L; 937 __ movptr(t, Address(method, Method::signature_handler_offset())); 938 __ testptr(t, t); 939 __ jcc(Assembler::notZero, L); 940 __ call_VM(noreg, 941 CAST_FROM_FN_PTR(address, 942 InterpreterRuntime::prepare_native_call), 943 method); 944 __ get_method(method); 945 __ movptr(t, Address(method, Method::signature_handler_offset())); 946 __ bind(L); 947 } 948 949 // call signature handler 950 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals, 951 "adjust this code"); 952 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp, 953 "adjust this code"); 954 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1), 955 "adjust this code"); 956 957 // The generated handlers do not touch RBX (the method oop). 958 // However, large signatures cannot be cached and are generated 959 // each time here. The slow-path generator can do a GC on return, 960 // so we must reload it after the call. 961 __ call(t); 962 __ get_method(method); // slow path can do a GC, reload RBX 963 964 965 // result handler is in rax 966 // set result handler 967 __ movptr(Address(rbp, 968 (frame::interpreter_frame_result_handler_offset) * wordSize), 969 rax); 970 971 // pass mirror handle if static call 972 { 973 Label L; 974 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); 975 __ movl(t, Address(method, Method::access_flags_offset())); 976 __ testl(t, JVM_ACC_STATIC); 977 __ jcc(Assembler::zero, L); 978 // get mirror 979 __ movptr(t, Address(method, Method::const_offset())); 980 __ movptr(t, Address(t, ConstMethod::constants_offset())); 981 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes())); 982 __ movptr(t, Address(t, mirror_offset)); 983 // copy mirror into activation frame 984 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), 985 t); 986 // pass handle to mirror 987 #ifndef _LP64 988 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 989 __ movptr(Address(rsp, wordSize), t); 990 #else 991 __ lea(c_rarg1, 992 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 993 #endif // _LP64 994 __ bind(L); 995 } 996 997 // get native function entry point 998 { 999 Label L; 1000 __ movptr(rax, Address(method, Method::native_function_offset())); 1001 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 1002 __ cmpptr(rax, unsatisfied.addr()); 1003 __ jcc(Assembler::notEqual, L); 1004 __ call_VM(noreg, 1005 CAST_FROM_FN_PTR(address, 1006 InterpreterRuntime::prepare_native_call), 1007 method); 1008 __ get_method(method); 1009 __ movptr(rax, Address(method, Method::native_function_offset())); 1010 __ bind(L); 1011 } 1012 1013 // pass JNIEnv 1014 #ifndef _LP64 1015 __ get_thread(thread); 1016 __ lea(t, Address(thread, JavaThread::jni_environment_offset())); 1017 __ movptr(Address(rsp, 0), t); 1018 1019 // set_last_Java_frame_before_call 1020 // It is enough that the pc() 1021 // points into the right code segment. It does not have to be the correct return pc. 1022 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 1023 #else 1024 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset())); 1025 1026 // It is enough that the pc() points into the right code 1027 // segment. It does not have to be the correct return pc. 1028 __ set_last_Java_frame(rsp, rbp, (address) __ pc()); 1029 #endif // _LP64 1030 1031 // change thread state 1032 #ifdef ASSERT 1033 { 1034 Label L; 1035 __ movl(t, Address(thread, JavaThread::thread_state_offset())); 1036 __ cmpl(t, _thread_in_Java); 1037 __ jcc(Assembler::equal, L); 1038 __ stop("Wrong thread state in native stub"); 1039 __ bind(L); 1040 } 1041 #endif 1042 1043 // Change state to native 1044 1045 __ movl(Address(thread, JavaThread::thread_state_offset()), 1046 _thread_in_native); 1047 1048 // Call the native method. 1049 __ call(rax); 1050 // 32: result potentially in rdx:rax or ST0 1051 // 64: result potentially in rax or xmm0 1052 1053 // Verify or restore cpu control state after JNI call 1054 __ restore_cpu_control_state_after_jni(); 1055 1056 // NOTE: The order of these pushes is known to frame::interpreter_frame_result 1057 // in order to extract the result of a method call. If the order of these 1058 // pushes change or anything else is added to the stack then the code in 1059 // interpreter_frame_result must also change. 1060 1061 #ifndef _LP64 1062 // save potential result in ST(0) & rdx:rax 1063 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 - 1064 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers) 1065 // It is safe to do this push because state is _thread_in_native and return address will be found 1066 // via _last_native_pc and not via _last_jave_sp 1067 1068 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result. 1069 // If the order changes or anything else is added to the stack the code in 1070 // interpreter_frame_result will have to be changed. 1071 1072 { Label L; 1073 Label push_double; 1074 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); 1075 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); 1076 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1077 float_handler.addr()); 1078 __ jcc(Assembler::equal, push_double); 1079 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1080 double_handler.addr()); 1081 __ jcc(Assembler::notEqual, L); 1082 __ bind(push_double); 1083 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0). 1084 __ bind(L); 1085 } 1086 #else 1087 __ push(dtos); 1088 #endif // _LP64 1089 1090 __ push(ltos); 1091 1092 // change thread state 1093 NOT_LP64(__ get_thread(thread)); 1094 __ movl(Address(thread, JavaThread::thread_state_offset()), 1095 _thread_in_native_trans); 1096 1097 if (os::is_MP()) { 1098 if (UseMembar) { 1099 // Force this write out before the read below 1100 __ membar(Assembler::Membar_mask_bits( 1101 Assembler::LoadLoad | Assembler::LoadStore | 1102 Assembler::StoreLoad | Assembler::StoreStore)); 1103 } else { 1104 // Write serialization page so VM thread can do a pseudo remote membar. 1105 // We use the current thread pointer to calculate a thread specific 1106 // offset to write to within the page. This minimizes bus traffic 1107 // due to cache line collision. 1108 __ serialize_memory(thread, rcx); 1109 } 1110 } 1111 1112 #ifndef _LP64 1113 if (AlwaysRestoreFPU) { 1114 // Make sure the control word is correct. 1115 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1116 } 1117 #endif // _LP64 1118 1119 // check for safepoint operation in progress and/or pending suspend requests 1120 { 1121 Label Continue; 1122 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 1123 SafepointSynchronize::_not_synchronized); 1124 1125 Label L; 1126 __ jcc(Assembler::notEqual, L); 1127 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); 1128 __ jcc(Assembler::equal, Continue); 1129 __ bind(L); 1130 1131 // Don't use call_VM as it will see a possible pending exception 1132 // and forward it and never return here preventing us from 1133 // clearing _last_native_pc down below. Also can't use 1134 // call_VM_leaf either as it will check to see if r13 & r14 are 1135 // preserved and correspond to the bcp/locals pointers. So we do a 1136 // runtime call by hand. 1137 // 1138 #ifndef _LP64 1139 __ push(thread); 1140 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, 1141 JavaThread::check_special_condition_for_native_trans))); 1142 __ increment(rsp, wordSize); 1143 __ get_thread(thread); 1144 #else 1145 __ mov(c_rarg0, r15_thread); 1146 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1147 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1148 __ andptr(rsp, -16); // align stack as required by ABI 1149 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); 1150 __ mov(rsp, r12); // restore sp 1151 __ reinit_heapbase(); 1152 #endif // _LP64 1153 __ bind(Continue); 1154 } 1155 1156 // change thread state 1157 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); 1158 1159 // reset_last_Java_frame 1160 __ reset_last_Java_frame(thread, true, true); 1161 1162 // reset handle block 1163 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); 1164 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); 1165 1166 // If result is an oop unbox and store it in frame where gc will see it 1167 // and result handler will pick it up 1168 1169 { 1170 Label no_oop, store_result; 1171 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); 1172 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); 1173 __ jcc(Assembler::notEqual, no_oop); 1174 // retrieve result 1175 __ pop(ltos); 1176 __ testptr(rax, rax); 1177 __ jcc(Assembler::zero, store_result); 1178 __ movptr(rax, Address(rax, 0)); 1179 __ bind(store_result); 1180 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax); 1181 // keep stack depth as expected by pushing oop which will eventually be discarded 1182 __ push(ltos); 1183 __ bind(no_oop); 1184 } 1185 1186 1187 { 1188 Label no_reguard; 1189 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), 1190 JavaThread::stack_guard_yellow_disabled); 1191 __ jcc(Assembler::notEqual, no_reguard); 1192 1193 __ pusha(); // XXX only save smashed registers 1194 #ifndef _LP64 1195 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1196 __ popa(); 1197 #else 1198 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1199 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1200 __ andptr(rsp, -16); // align stack as required by ABI 1201 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1202 __ mov(rsp, r12); // restore sp 1203 __ popa(); // XXX only restore smashed registers 1204 __ reinit_heapbase(); 1205 #endif // _LP64 1206 1207 __ bind(no_reguard); 1208 } 1209 1210 1211 // The method register is junk from after the thread_in_native transition 1212 // until here. Also can't call_VM until the bcp has been 1213 // restored. Need bcp for throwing exception below so get it now. 1214 __ get_method(method); 1215 1216 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base() 1217 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod* 1218 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase 1219 1220 // handle exceptions (exception handling will handle unlocking!) 1221 { 1222 Label L; 1223 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 1224 __ jcc(Assembler::zero, L); 1225 // Note: At some point we may want to unify this with the code 1226 // used in call_VM_base(); i.e., we should use the 1227 // StubRoutines::forward_exception code. For now this doesn't work 1228 // here because the rsp is not correctly set at this point. 1229 __ MacroAssembler::call_VM(noreg, 1230 CAST_FROM_FN_PTR(address, 1231 InterpreterRuntime::throw_pending_exception)); 1232 __ should_not_reach_here(); 1233 __ bind(L); 1234 } 1235 1236 // do unlocking if necessary 1237 { 1238 Label L; 1239 __ movl(t, Address(method, Method::access_flags_offset())); 1240 __ testl(t, JVM_ACC_SYNCHRONIZED); 1241 __ jcc(Assembler::zero, L); 1242 // the code below should be shared with interpreter macro 1243 // assembler implementation 1244 { 1245 Label unlock; 1246 // BasicObjectLock will be first in list, since this is a 1247 // synchronized method. However, need to check that the object 1248 // has not been unlocked by an explicit monitorexit bytecode. 1249 const Address monitor(rbp, 1250 (intptr_t)(frame::interpreter_frame_initial_sp_offset * 1251 wordSize - (int)sizeof(BasicObjectLock))); 1252 1253 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 1254 1255 // monitor expect in c_rarg1 for slow unlock path 1256 __ lea(regmon, monitor); // address of first monitor 1257 1258 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes())); 1259 __ testptr(t, t); 1260 __ jcc(Assembler::notZero, unlock); 1261 1262 // Entry already unlocked, need to throw exception 1263 __ MacroAssembler::call_VM(noreg, 1264 CAST_FROM_FN_PTR(address, 1265 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1266 __ should_not_reach_here(); 1267 1268 __ bind(unlock); 1269 __ unlock_object(regmon); 1270 } 1271 __ bind(L); 1272 } 1273 1274 // jvmti support 1275 // Note: This must happen _after_ handling/throwing any exceptions since 1276 // the exception handler code notifies the runtime of method exits 1277 // too. If this happens before, method entry/exit notifications are 1278 // not properly paired (was bug - gri 11/22/99). 1279 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1280 1281 // restore potential result in edx:eax, call result handler to 1282 // restore potential result in ST0 & handle result 1283 1284 __ pop(ltos); 1285 LP64_ONLY( __ pop(dtos)); 1286 1287 __ movptr(t, Address(rbp, 1288 (frame::interpreter_frame_result_handler_offset) * wordSize)); 1289 __ call(t); 1290 1291 // remove activation 1292 __ movptr(t, Address(rbp, 1293 frame::interpreter_frame_sender_sp_offset * 1294 wordSize)); // get sender sp 1295 __ leave(); // remove frame anchor 1296 __ pop(rdi); // get return address 1297 __ mov(rsp, t); // set sp to sender sp 1298 __ jmp(rdi); 1299 1300 if (inc_counter) { 1301 // Handle overflow of counter and compile method 1302 __ bind(invocation_counter_overflow); 1303 generate_counter_overflow(&continue_after_compile); 1304 } 1305 1306 return entry_point; 1307 } 1308 1309 // 1310 // Generic interpreted method entry to (asm) interpreter 1311 // 1312 address InterpreterGenerator::generate_normal_entry(bool synchronized) { 1313 // determine code generation flags 1314 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1315 1316 // ebx: Method* 1317 // rbcp: sender sp 1318 address entry_point = __ pc(); 1319 1320 const Address constMethod(rbx, Method::const_offset()); 1321 const Address access_flags(rbx, Method::access_flags_offset()); 1322 const Address size_of_parameters(rdx, 1323 ConstMethod::size_of_parameters_offset()); 1324 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset()); 1325 1326 1327 // get parameter size (always needed) 1328 __ movptr(rdx, constMethod); 1329 __ load_unsigned_short(rcx, size_of_parameters); 1330 1331 // rbx: Method* 1332 // rcx: size of parameters 1333 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i ) 1334 1335 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words 1336 __ subl(rdx, rcx); // rdx = no. of additional locals 1337 1338 // YYY 1339 // __ incrementl(rdx); 1340 // __ andl(rdx, -2); 1341 1342 // see if we've got enough room on the stack for locals plus overhead. 1343 generate_stack_overflow_check(); 1344 1345 // get return address 1346 __ pop(rax); 1347 1348 // compute beginning of parameters 1349 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 1350 1351 // rdx - # of additional locals 1352 // allocate space for locals 1353 // explicitly initialize locals 1354 { 1355 Label exit, loop; 1356 __ testl(rdx, rdx); 1357 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 1358 __ bind(loop); 1359 __ push((int) NULL_WORD); // initialize local variables 1360 __ decrementl(rdx); // until everything initialized 1361 __ jcc(Assembler::greater, loop); 1362 __ bind(exit); 1363 } 1364 1365 // initialize fixed part of activation frame 1366 generate_fixed_frame(false); 1367 1368 // make sure method is not native & not abstract 1369 #ifdef ASSERT 1370 __ movl(rax, access_flags); 1371 { 1372 Label L; 1373 __ testl(rax, JVM_ACC_NATIVE); 1374 __ jcc(Assembler::zero, L); 1375 __ stop("tried to execute native method as non-native"); 1376 __ bind(L); 1377 } 1378 { 1379 Label L; 1380 __ testl(rax, JVM_ACC_ABSTRACT); 1381 __ jcc(Assembler::zero, L); 1382 __ stop("tried to execute abstract method in interpreter"); 1383 __ bind(L); 1384 } 1385 #endif 1386 1387 // Since at this point in the method invocation the exception 1388 // handler would try to exit the monitor of synchronized methods 1389 // which hasn't been entered yet, we set the thread local variable 1390 // _do_not_unlock_if_synchronized to true. The remove_activation 1391 // will check this flag. 1392 1393 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread); 1394 NOT_LP64(__ get_thread(thread)); 1395 const Address do_not_unlock_if_synchronized(thread, 1396 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1397 __ movbool(do_not_unlock_if_synchronized, true); 1398 1399 __ profile_parameters_type(rax, rcx, rdx); 1400 // increment invocation count & check for overflow 1401 Label invocation_counter_overflow; 1402 Label profile_method; 1403 Label profile_method_continue; 1404 if (inc_counter) { 1405 generate_counter_incr(&invocation_counter_overflow, 1406 &profile_method, 1407 &profile_method_continue); 1408 if (ProfileInterpreter) { 1409 __ bind(profile_method_continue); 1410 } 1411 } 1412 1413 Label continue_after_compile; 1414 __ bind(continue_after_compile); 1415 1416 // check for synchronized interpreted methods 1417 bang_stack_shadow_pages(false); 1418 1419 // reset the _do_not_unlock_if_synchronized flag 1420 NOT_LP64(__ get_thread(thread)); 1421 __ movbool(do_not_unlock_if_synchronized, false); 1422 1423 // check for synchronized methods 1424 // Must happen AFTER invocation_counter check and stack overflow check, 1425 // so method is not locked if overflows. 1426 if (synchronized) { 1427 // Allocate monitor and lock method 1428 lock_method(); 1429 } else { 1430 // no synchronization necessary 1431 #ifdef ASSERT 1432 { 1433 Label L; 1434 __ movl(rax, access_flags); 1435 __ testl(rax, JVM_ACC_SYNCHRONIZED); 1436 __ jcc(Assembler::zero, L); 1437 __ stop("method needs synchronization"); 1438 __ bind(L); 1439 } 1440 #endif 1441 } 1442 1443 // start execution 1444 #ifdef ASSERT 1445 { 1446 Label L; 1447 const Address monitor_block_top (rbp, 1448 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1449 __ movptr(rax, monitor_block_top); 1450 __ cmpptr(rax, rsp); 1451 __ jcc(Assembler::equal, L); 1452 __ stop("broken stack frame setup in interpreter"); 1453 __ bind(L); 1454 } 1455 #endif 1456 1457 // jvmti support 1458 __ notify_method_entry(); 1459 1460 __ dispatch_next(vtos); 1461 1462 // invocation counter overflow 1463 if (inc_counter) { 1464 if (ProfileInterpreter) { 1465 // We have decided to profile this method in the interpreter 1466 __ bind(profile_method); 1467 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1468 __ set_method_data_pointer_for_bcp(); 1469 __ get_method(rbx); 1470 __ jmp(profile_method_continue); 1471 } 1472 // Handle overflow of counter and compile method 1473 __ bind(invocation_counter_overflow); 1474 generate_counter_overflow(&continue_after_compile); 1475 } 1476 1477 return entry_point; 1478 } 1479 1480 //----------------------------------------------------------------------------- 1481 // Exceptions 1482 1483 void TemplateInterpreterGenerator::generate_throw_exception() { 1484 // Entry point in previous activation (i.e., if the caller was 1485 // interpreted) 1486 Interpreter::_rethrow_exception_entry = __ pc(); 1487 // Restore sp to interpreter_frame_last_sp even though we are going 1488 // to empty the expression stack for the exception processing. 1489 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1490 // rax: exception 1491 // rdx: return address/pc that threw exception 1492 __ restore_bcp(); // r13/rsi points to call/send 1493 __ restore_locals(); 1494 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase. 1495 // Entry point for exceptions thrown within interpreter code 1496 Interpreter::_throw_exception_entry = __ pc(); 1497 // expression stack is undefined here 1498 // rax: exception 1499 // r13/rsi: exception bcp 1500 __ verify_oop(rax); 1501 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 1502 LP64_ONLY(__ mov(c_rarg1, rax)); 1503 1504 // expression stack must be empty before entering the VM in case of 1505 // an exception 1506 __ empty_expression_stack(); 1507 // find exception handler address and preserve exception oop 1508 __ call_VM(rdx, 1509 CAST_FROM_FN_PTR(address, 1510 InterpreterRuntime::exception_handler_for_exception), 1511 rarg); 1512 // rax: exception handler entry point 1513 // rdx: preserved exception oop 1514 // r13/rsi: bcp for exception handler 1515 __ push_ptr(rdx); // push exception which is now the only value on the stack 1516 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) 1517 1518 // If the exception is not handled in the current frame the frame is 1519 // removed and the exception is rethrown (i.e. exception 1520 // continuation is _rethrow_exception). 1521 // 1522 // Note: At this point the bci is still the bxi for the instruction 1523 // which caused the exception and the expression stack is 1524 // empty. Thus, for any VM calls at this point, GC will find a legal 1525 // oop map (with empty expression stack). 1526 1527 // In current activation 1528 // tos: exception 1529 // esi: exception bcp 1530 1531 // 1532 // JVMTI PopFrame support 1533 // 1534 1535 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1536 __ empty_expression_stack(); 1537 // Set the popframe_processing bit in pending_popframe_condition 1538 // indicating that we are currently handling popframe, so that 1539 // call_VMs that may happen later do not trigger new popframe 1540 // handling cycles. 1541 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 1542 NOT_LP64(__ get_thread(thread)); 1543 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset())); 1544 __ orl(rdx, JavaThread::popframe_processing_bit); 1545 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx); 1546 1547 { 1548 // Check to see whether we are returning to a deoptimized frame. 1549 // (The PopFrame call ensures that the caller of the popped frame is 1550 // either interpreted or compiled and deoptimizes it if compiled.) 1551 // In this case, we can't call dispatch_next() after the frame is 1552 // popped, but instead must save the incoming arguments and restore 1553 // them after deoptimization has occurred. 1554 // 1555 // Note that we don't compare the return PC against the 1556 // deoptimization blob's unpack entry because of the presence of 1557 // adapter frames in C2. 1558 Label caller_not_deoptimized; 1559 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 1560 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize)); 1561 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1562 InterpreterRuntime::interpreter_contains), rarg); 1563 __ testl(rax, rax); 1564 __ jcc(Assembler::notZero, caller_not_deoptimized); 1565 1566 // Compute size of arguments for saving when returning to 1567 // deoptimized caller 1568 __ get_method(rax); 1569 __ movptr(rax, Address(rax, Method::const_offset())); 1570 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod:: 1571 size_of_parameters_offset()))); 1572 __ shll(rax, Interpreter::logStackElementSize); 1573 __ restore_locals(); 1574 __ subptr(rlocals, rax); 1575 __ addptr(rlocals, wordSize); 1576 // Save these arguments 1577 NOT_LP64(__ get_thread(thread)); 1578 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1579 Deoptimization:: 1580 popframe_preserve_args), 1581 thread, rax, rlocals); 1582 1583 __ remove_activation(vtos, rdx, 1584 /* throw_monitor_exception */ false, 1585 /* install_monitor_exception */ false, 1586 /* notify_jvmdi */ false); 1587 1588 // Inform deoptimization that it is responsible for restoring 1589 // these arguments 1590 NOT_LP64(__ get_thread(thread)); 1591 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1592 JavaThread::popframe_force_deopt_reexecution_bit); 1593 1594 // Continue in deoptimization handler 1595 __ jmp(rdx); 1596 1597 __ bind(caller_not_deoptimized); 1598 } 1599 1600 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */ 1601 /* throw_monitor_exception */ false, 1602 /* install_monitor_exception */ false, 1603 /* notify_jvmdi */ false); 1604 1605 // Finish with popframe handling 1606 // A previous I2C followed by a deoptimization might have moved the 1607 // outgoing arguments further up the stack. PopFrame expects the 1608 // mutations to those outgoing arguments to be preserved and other 1609 // constraints basically require this frame to look exactly as 1610 // though it had previously invoked an interpreted activation with 1611 // no space between the top of the expression stack (current 1612 // last_sp) and the top of stack. Rather than force deopt to 1613 // maintain this kind of invariant all the time we call a small 1614 // fixup routine to move the mutated arguments onto the top of our 1615 // expression stack if necessary. 1616 #ifndef _LP64 1617 __ mov(rax, rsp); 1618 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1619 __ get_thread(thread); 1620 // PC must point into interpreter here 1621 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 1622 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx); 1623 __ get_thread(thread); 1624 #else 1625 __ mov(c_rarg1, rsp); 1626 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1627 // PC must point into interpreter here 1628 __ set_last_Java_frame(noreg, rbp, __ pc()); 1629 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2); 1630 #endif 1631 __ reset_last_Java_frame(thread, true, true); 1632 1633 // Restore the last_sp and null it out 1634 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1635 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1636 1637 __ restore_bcp(); 1638 __ restore_locals(); 1639 // The method data pointer was incremented already during 1640 // call profiling. We have to restore the mdp for the current bcp. 1641 if (ProfileInterpreter) { 1642 __ set_method_data_pointer_for_bcp(); 1643 } 1644 1645 // Clear the popframe condition flag 1646 NOT_LP64(__ get_thread(thread)); 1647 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1648 JavaThread::popframe_inactive); 1649 1650 #if INCLUDE_JVMTI 1651 { 1652 Label L_done; 1653 const Register local0 = rlocals; 1654 1655 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic); 1656 __ jcc(Assembler::notEqual, L_done); 1657 1658 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. 1659 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. 1660 1661 __ get_method(rdx); 1662 __ movptr(rax, Address(local0, 0)); 1663 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp); 1664 1665 __ testptr(rax, rax); 1666 __ jcc(Assembler::zero, L_done); 1667 1668 __ movptr(Address(rbx, 0), rax); 1669 __ bind(L_done); 1670 } 1671 #endif // INCLUDE_JVMTI 1672 1673 __ dispatch_next(vtos); 1674 // end of PopFrame support 1675 1676 Interpreter::_remove_activation_entry = __ pc(); 1677 1678 // preserve exception over this code sequence 1679 __ pop_ptr(rax); 1680 NOT_LP64(__ get_thread(thread)); 1681 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax); 1682 // remove the activation (without doing throws on illegalMonitorExceptions) 1683 __ remove_activation(vtos, rdx, false, true, false); 1684 // restore exception 1685 NOT_LP64(__ get_thread(thread)); 1686 __ get_vm_result(rax, thread); 1687 1688 // In between activations - previous activation type unknown yet 1689 // compute continuation point - the continuation point expects the 1690 // following registers set up: 1691 // 1692 // rax: exception 1693 // rdx: return address/pc that threw exception 1694 // rsp: expression stack of caller 1695 // rbp: ebp of caller 1696 __ push(rax); // save exception 1697 __ push(rdx); // save return address 1698 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1699 SharedRuntime::exception_handler_for_return_address), 1700 thread, rdx); 1701 __ mov(rbx, rax); // save exception handler 1702 __ pop(rdx); // restore return address 1703 __ pop(rax); // restore exception 1704 // Note that an "issuing PC" is actually the next PC after the call 1705 __ jmp(rbx); // jump to exception 1706 // handler of caller 1707 } 1708 1709 1710 // 1711 // JVMTI ForceEarlyReturn support 1712 // 1713 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1714 address entry = __ pc(); 1715 1716 __ restore_bcp(); 1717 __ restore_locals(); 1718 __ empty_expression_stack(); 1719 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse 1720 1721 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 1722 NOT_LP64(__ get_thread(thread)); 1723 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 1724 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset()); 1725 1726 // Clear the earlyret state 1727 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); 1728 1729 __ remove_activation(state, rsi, 1730 false, /* throw_monitor_exception */ 1731 false, /* install_monitor_exception */ 1732 true); /* notify_jvmdi */ 1733 __ jmp(rsi); 1734 1735 return entry; 1736 } // end of ForceEarlyReturn support 1737 1738 1739 //----------------------------------------------------------------------------- 1740 // Helper for vtos entry point generation 1741 1742 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 1743 address& bep, 1744 address& cep, 1745 address& sep, 1746 address& aep, 1747 address& iep, 1748 address& lep, 1749 address& fep, 1750 address& dep, 1751 address& vep) { 1752 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1753 Label L; 1754 aep = __ pc(); __ push_ptr(); __ jmp(L); 1755 #ifndef _LP64 1756 fep = __ pc(); __ push(ftos); __ jmp(L); 1757 dep = __ pc(); __ push(dtos); __ jmp(L); 1758 #else 1759 fep = __ pc(); __ push_f(xmm0); __ jmp(L); 1760 dep = __ pc(); __ push_d(xmm0); __ jmp(L); 1761 #endif // _LP64 1762 lep = __ pc(); __ push_l(); __ jmp(L); 1763 bep = cep = sep = 1764 iep = __ pc(); __ push_i(); 1765 vep = __ pc(); 1766 __ bind(L); 1767 generate_and_dispatch(t); 1768 } 1769 1770 1771 //----------------------------------------------------------------------------- 1772 // Generation of individual instructions 1773 1774 // helpers for generate_and_dispatch 1775 1776 1777 InterpreterGenerator::InterpreterGenerator(StubQueue* code) 1778 : TemplateInterpreterGenerator(code) { 1779 generate_all(); // down here so it can be "virtual" 1780 } 1781 1782 //----------------------------------------------------------------------------- 1783 1784 // Non-product code 1785 #ifndef PRODUCT 1786 1787 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1788 address entry = __ pc(); 1789 1790 #ifndef _LP64 1791 // prepare expression stack 1792 __ pop(rcx); // pop return address so expression stack is 'pure' 1793 __ push(state); // save tosca 1794 1795 // pass tosca registers as arguments & call tracer 1796 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx); 1797 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state) 1798 __ pop(state); // restore tosca 1799 1800 // return 1801 __ jmp(rcx); 1802 #else 1803 __ push(state); 1804 __ push(c_rarg0); 1805 __ push(c_rarg1); 1806 __ push(c_rarg2); 1807 __ push(c_rarg3); 1808 __ mov(c_rarg2, rax); // Pass itos 1809 #ifdef _WIN64 1810 __ movflt(xmm3, xmm0); // Pass ftos 1811 #endif 1812 __ call_VM(noreg, 1813 CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), 1814 c_rarg1, c_rarg2, c_rarg3); 1815 __ pop(c_rarg3); 1816 __ pop(c_rarg2); 1817 __ pop(c_rarg1); 1818 __ pop(c_rarg0); 1819 __ pop(state); 1820 __ ret(0); // return from result handler 1821 #endif // _LP64 1822 1823 return entry; 1824 } 1825 1826 void TemplateInterpreterGenerator::count_bytecode() { 1827 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); 1828 } 1829 1830 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 1831 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); 1832 } 1833 1834 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 1835 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index)); 1836 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); 1837 __ orl(rbx, 1838 ((int) t->bytecode()) << 1839 BytecodePairHistogram::log2_number_of_codes); 1840 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); 1841 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters)); 1842 __ incrementl(Address(rscratch1, rbx, Address::times_4)); 1843 } 1844 1845 1846 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 1847 // Call a little run-time stub to avoid blow-up for each bytecode. 1848 // The run-time runtime saves the right registers, depending on 1849 // the tosca in-state for the given template. 1850 1851 assert(Interpreter::trace_code(t->tos_in()) != NULL, 1852 "entry must have been generated"); 1853 #ifndef _LP64 1854 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1855 #else 1856 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1857 __ andptr(rsp, -16); // align stack as required by ABI 1858 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1859 __ mov(rsp, r12); // restore sp 1860 __ reinit_heapbase(); 1861 #endif // _LP64 1862 } 1863 1864 1865 void TemplateInterpreterGenerator::stop_interpreter_at() { 1866 Label L; 1867 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), 1868 StopInterpreterAt); 1869 __ jcc(Assembler::notEqual, L); 1870 __ int3(); 1871 __ bind(L); 1872 } 1873 #endif // !PRODUCT 1874 #endif // ! CC_INTERP