1 /* 2 * Copyright (c) 2003, 2017, 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/interp_masm.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "interpreter/interpreterRuntime.hpp" 31 #include "interpreter/templateInterpreterGenerator.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 // Size of interpreter code. Increase if too small. Interpreter will 53 // fail with a guarantee ("not enough space for interpreter generation"); 54 // if too small. 55 // Run with +PrintInterpreter to get the VM to print out the size. 56 // Max size with JVMTI 57 #ifdef AMD64 58 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(268) NOT_JVMCI(256) * 1024; 59 #else 60 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024; 61 #endif // AMD64 62 63 // Global Register Names 64 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi); 65 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi); 66 67 const int method_offset = frame::interpreter_frame_method_offset * wordSize; 68 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize; 69 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; 70 71 72 //----------------------------------------------------------------------------- 73 74 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 75 address entry = __ pc(); 76 77 #ifdef ASSERT 78 { 79 Label L; 80 __ lea(rax, Address(rbp, 81 frame::interpreter_frame_monitor_block_top_offset * 82 wordSize)); 83 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack 84 // grows negative) 85 __ jcc(Assembler::aboveEqual, L); // check if frame is complete 86 __ stop ("interpreter frame not set up"); 87 __ bind(L); 88 } 89 #endif // ASSERT 90 // Restore bcp under the assumption that the current frame is still 91 // interpreted 92 __ restore_bcp(); 93 94 // expression stack must be empty before entering the VM if an 95 // exception happened 96 __ empty_expression_stack(); 97 // throw exception 98 __ call_VM(noreg, 99 CAST_FROM_FN_PTR(address, 100 InterpreterRuntime::throw_StackOverflowError)); 101 return entry; 102 } 103 104 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler( 105 const char* name) { 106 address entry = __ pc(); 107 // expression stack must be empty before entering the VM if an 108 // exception happened 109 __ empty_expression_stack(); 110 // setup parameters 111 // ??? convention: expect aberrant index in register ebx 112 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 113 __ lea(rarg, ExternalAddress((address)name)); 114 __ call_VM(noreg, 115 CAST_FROM_FN_PTR(address, 116 InterpreterRuntime:: 117 throw_ArrayIndexOutOfBoundsException), 118 rarg, rbx); 119 return entry; 120 } 121 122 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 123 address entry = __ pc(); 124 125 // object is at TOS 126 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 127 __ pop(rarg); 128 129 // expression stack must be empty before entering the VM if an 130 // exception happened 131 __ empty_expression_stack(); 132 133 __ call_VM(noreg, 134 CAST_FROM_FN_PTR(address, 135 InterpreterRuntime:: 136 throw_ClassCastException), 137 rarg); 138 return entry; 139 } 140 141 address TemplateInterpreterGenerator::generate_exception_handler_common( 142 const char* name, const char* message, bool pass_oop) { 143 assert(!pass_oop || message == NULL, "either oop or message but not both"); 144 address entry = __ pc(); 145 146 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 147 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2); 148 149 if (pass_oop) { 150 // object is at TOS 151 __ pop(rarg2); 152 } 153 // expression stack must be empty before entering the VM if an 154 // exception happened 155 __ empty_expression_stack(); 156 // setup parameters 157 __ lea(rarg, ExternalAddress((address)name)); 158 if (pass_oop) { 159 __ call_VM(rax, CAST_FROM_FN_PTR(address, 160 InterpreterRuntime:: 161 create_klass_exception), 162 rarg, rarg2); 163 } else { 164 __ lea(rarg2, ExternalAddress((address)message)); 165 __ call_VM(rax, 166 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), 167 rarg, rarg2); 168 } 169 // throw exception 170 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 171 return entry; 172 } 173 174 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { 175 address entry = __ pc(); 176 177 #ifndef _LP64 178 #ifdef COMPILER2 179 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases 180 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) { 181 for (int i = 1; i < 8; i++) { 182 __ ffree(i); 183 } 184 } else if (UseSSE < 2) { 185 __ empty_FPU_stack(); 186 } 187 #endif // COMPILER2 188 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) { 189 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled"); 190 } else { 191 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled"); 192 } 193 194 if (state == ftos) { 195 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter"); 196 } else if (state == dtos) { 197 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter"); 198 } 199 #endif // _LP64 200 201 // Restore stack bottom in case i2c adjusted stack 202 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 203 // and NULL it as marker that esp is now tos until next java call 204 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 205 206 __ restore_bcp(); 207 __ restore_locals(); 208 209 if (state == atos) { 210 Register mdp = rbx; 211 Register tmp = rcx; 212 __ profile_return_type(mdp, rax, tmp); 213 } 214 215 const Register cache = rbx; 216 const Register index = rcx; 217 __ get_cache_and_index_at_bcp(cache, index, 1, index_size); 218 219 const Register flags = cache; 220 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); 221 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask); 222 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale())); 223 224 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 225 if (JvmtiExport::can_pop_frame()) { 226 NOT_LP64(__ get_thread(java_thread)); 227 __ check_and_handle_popframe(java_thread); 228 } 229 if (JvmtiExport::can_force_early_return()) { 230 NOT_LP64(__ get_thread(java_thread)); 231 __ check_and_handle_earlyret(java_thread); 232 } 233 234 __ dispatch_next(state, step); 235 236 return entry; 237 } 238 239 240 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { 241 address entry = __ pc(); 242 243 #ifndef _LP64 244 if (state == ftos) { 245 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter"); 246 } else if (state == dtos) { 247 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter"); 248 } 249 #endif // _LP64 250 251 // NULL last_sp until next java call 252 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 253 __ restore_bcp(); 254 __ restore_locals(); 255 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 256 NOT_LP64(__ get_thread(thread)); 257 #if INCLUDE_JVMCI 258 // Check if we need to take lock at entry of synchronized method. This can 259 // only occur on method entry so emit it only for vtos with step 0. 260 if ((UseJVMCICompiler || UseAOT) && state == vtos && step == 0) { 261 Label L; 262 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 263 __ jcc(Assembler::zero, L); 264 // Clear flag. 265 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 266 // Satisfy calling convention for lock_method(). 267 __ get_method(rbx); 268 // Take lock. 269 lock_method(); 270 __ bind(L); 271 } else { 272 #ifdef ASSERT 273 if (UseJVMCICompiler) { 274 Label L; 275 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0); 276 __ jccb(Assembler::zero, L); 277 __ stop("unexpected pending monitor in deopt entry"); 278 __ bind(L); 279 } 280 #endif 281 } 282 #endif 283 // handle exceptions 284 { 285 Label L; 286 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 287 __ jcc(Assembler::zero, L); 288 __ call_VM(noreg, 289 CAST_FROM_FN_PTR(address, 290 InterpreterRuntime::throw_pending_exception)); 291 __ should_not_reach_here(); 292 __ bind(L); 293 } 294 __ dispatch_next(state, step); 295 return entry; 296 } 297 298 address TemplateInterpreterGenerator::generate_result_handler_for( 299 BasicType type) { 300 address entry = __ pc(); 301 switch (type) { 302 case T_BOOLEAN: __ c2bool(rax); break; 303 #ifndef _LP64 304 case T_CHAR : __ andptr(rax, 0xFFFF); break; 305 #else 306 case T_CHAR : __ movzwl(rax, rax); break; 307 #endif // _LP64 308 case T_BYTE : __ sign_extend_byte(rax); break; 309 case T_SHORT : __ sign_extend_short(rax); break; 310 case T_INT : /* nothing to do */ break; 311 case T_LONG : /* nothing to do */ break; 312 case T_VOID : /* nothing to do */ break; 313 #ifndef _LP64 314 case T_DOUBLE : 315 case T_FLOAT : 316 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); 317 __ pop(t); // remove return address first 318 // Must return a result for interpreter or compiler. In SSE 319 // mode, results are returned in xmm0 and the FPU stack must 320 // be empty. 321 if (type == T_FLOAT && UseSSE >= 1) { 322 // Load ST0 323 __ fld_d(Address(rsp, 0)); 324 // Store as float and empty fpu stack 325 __ fstp_s(Address(rsp, 0)); 326 // and reload 327 __ movflt(xmm0, Address(rsp, 0)); 328 } else if (type == T_DOUBLE && UseSSE >= 2 ) { 329 __ movdbl(xmm0, Address(rsp, 0)); 330 } else { 331 // restore ST0 332 __ fld_d(Address(rsp, 0)); 333 } 334 // and pop the temp 335 __ addptr(rsp, 2 * wordSize); 336 __ push(t); // restore return address 337 } 338 break; 339 #else 340 case T_FLOAT : /* nothing to do */ break; 341 case T_DOUBLE : /* nothing to do */ break; 342 #endif // _LP64 343 344 case T_OBJECT : 345 // retrieve result from frame 346 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); 347 // and verify it 348 __ verify_oop(rax); 349 break; 350 default : ShouldNotReachHere(); 351 } 352 __ ret(0); // return from result handler 353 return entry; 354 } 355 356 address TemplateInterpreterGenerator::generate_safept_entry_for( 357 TosState state, 358 address runtime_entry) { 359 address entry = __ pc(); 360 __ push(state); 361 __ call_VM(noreg, runtime_entry); 362 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 363 return entry; 364 } 365 366 367 368 // Helpers for commoning out cases in the various type of method entries. 369 // 370 371 372 // increment invocation count & check for overflow 373 // 374 // Note: checking for negative value instead of overflow 375 // so we have a 'sticky' overflow test 376 // 377 // rbx: method 378 // rcx: invocation counter 379 // 380 void TemplateInterpreterGenerator::generate_counter_incr( 381 Label* overflow, 382 Label* profile_method, 383 Label* profile_method_continue) { 384 Label done; 385 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. 386 if (TieredCompilation) { 387 int increment = InvocationCounter::count_increment; 388 Label no_mdo; 389 if (ProfileInterpreter) { 390 // Are we profiling? 391 __ movptr(rax, Address(rbx, Method::method_data_offset())); 392 __ testptr(rax, rax); 393 __ jccb(Assembler::zero, no_mdo); 394 // Increment counter in the MDO 395 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) + 396 in_bytes(InvocationCounter::counter_offset())); 397 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset())); 398 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); 399 __ jmp(done); 400 } 401 __ bind(no_mdo); 402 // Increment counter in MethodCounters 403 const Address invocation_counter(rax, 404 MethodCounters::invocation_counter_offset() + 405 InvocationCounter::counter_offset()); 406 __ get_method_counters(rbx, rax, done); 407 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset())); 408 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, 409 false, Assembler::zero, overflow); 410 __ bind(done); 411 } else { // not TieredCompilation 412 const Address backedge_counter(rax, 413 MethodCounters::backedge_counter_offset() + 414 InvocationCounter::counter_offset()); 415 const Address invocation_counter(rax, 416 MethodCounters::invocation_counter_offset() + 417 InvocationCounter::counter_offset()); 418 419 __ get_method_counters(rbx, rax, done); 420 421 if (ProfileInterpreter) { 422 __ incrementl(Address(rax, 423 MethodCounters::interpreter_invocation_counter_offset())); 424 } 425 // Update standard invocation counters 426 __ movl(rcx, invocation_counter); 427 __ incrementl(rcx, InvocationCounter::count_increment); 428 __ movl(invocation_counter, rcx); // save invocation count 429 430 __ movl(rax, backedge_counter); // load backedge counter 431 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits 432 433 __ addl(rcx, rax); // add both counters 434 435 // profile_method is non-null only for interpreted method so 436 // profile_method != NULL == !native_call 437 438 if (ProfileInterpreter && profile_method != NULL) { 439 // Test to see if we should create a method data oop 440 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 441 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 442 __ jcc(Assembler::less, *profile_method_continue); 443 444 // if no method data exists, go to profile_method 445 __ test_method_data_pointer(rax, *profile_method); 446 } 447 448 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 449 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset()))); 450 __ jcc(Assembler::aboveEqual, *overflow); 451 __ bind(done); 452 } 453 } 454 455 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { 456 457 // Asm interpreter on entry 458 // r14/rdi - locals 459 // r13/rsi - bcp 460 // rbx - method 461 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE 462 // rbp - interpreter frame 463 464 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 465 // Everything as it was on entry 466 // rdx is not restored. Doesn't appear to really be set. 467 468 // InterpreterRuntime::frequency_counter_overflow takes two 469 // arguments, the first (thread) is passed by call_VM, the second 470 // indicates if the counter overflow occurs at a backwards branch 471 // (NULL bcp). We pass zero for it. The call returns the address 472 // of the verified entry point for the method or NULL if the 473 // compilation did not complete (either went background or bailed 474 // out). 475 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 476 __ movl(rarg, 0); 477 __ call_VM(noreg, 478 CAST_FROM_FN_PTR(address, 479 InterpreterRuntime::frequency_counter_overflow), 480 rarg); 481 482 __ movptr(rbx, Address(rbp, method_offset)); // restore Method* 483 // Preserve invariant that r13/r14 contain bcp/locals of sender frame 484 // and jump to the interpreted entry. 485 __ jmp(do_continue, relocInfo::none); 486 } 487 488 // See if we've got enough room on the stack for locals plus overhead below 489 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError 490 // without going through the signal handler, i.e., reserved and yellow zones 491 // will not be made usable. The shadow zone must suffice to handle the 492 // overflow. 493 // The expression stack grows down incrementally, so the normal guard 494 // page mechanism will work for that. 495 // 496 // NOTE: Since the additional locals are also always pushed (wasn't 497 // obvious in generate_fixed_frame) so the guard should work for them 498 // too. 499 // 500 // Args: 501 // rdx: number of additional locals this frame needs (what we must check) 502 // rbx: Method* 503 // 504 // Kills: 505 // rax 506 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) { 507 508 // monitor entry size: see picture of stack in frame_x86.hpp 509 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 510 511 // total overhead size: entry_size + (saved rbp through expr stack 512 // bottom). be sure to change this if you add/subtract anything 513 // to/from the overhead area 514 const int overhead_size = 515 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; 516 517 const int page_size = os::vm_page_size(); 518 519 Label after_frame_check; 520 521 // see if the frame is greater than one page in size. If so, 522 // then we need to verify there is enough stack space remaining 523 // for the additional locals. 524 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize); 525 __ jcc(Assembler::belowEqual, after_frame_check); 526 527 // compute rsp as if this were going to be the last frame on 528 // the stack before the red zone 529 530 Label after_frame_check_pop; 531 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 532 #ifndef _LP64 533 __ push(thread); 534 __ get_thread(thread); 535 #endif 536 537 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset()); 538 539 // locals + overhead, in bytes 540 __ mov(rax, rdx); 541 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes. 542 __ addptr(rax, overhead_size); 543 544 #ifdef ASSERT 545 Label limit_okay; 546 // Verify that thread stack overflow limit is non-zero. 547 __ cmpptr(stack_limit, (int32_t)NULL_WORD); 548 __ jcc(Assembler::notEqual, limit_okay); 549 __ stop("stack overflow limit is zero"); 550 __ bind(limit_okay); 551 #endif 552 553 // Add locals/frame size to stack limit. 554 __ addptr(rax, stack_limit); 555 556 // Check against the current stack bottom. 557 __ cmpptr(rsp, rax); 558 559 __ jcc(Assembler::above, after_frame_check_pop); 560 NOT_LP64(__ pop(rsi)); // get saved bcp 561 562 // Restore sender's sp as SP. This is necessary if the sender's 563 // frame is an extended compiled frame (see gen_c2i_adapter()) 564 // and safer anyway in case of JSR292 adaptations. 565 566 __ pop(rax); // return address must be moved if SP is changed 567 __ mov(rsp, rbcp); 568 __ push(rax); 569 570 // Note: the restored frame is not necessarily interpreted. 571 // Use the shared runtime version of the StackOverflowError. 572 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 573 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry())); 574 // all done with frame size check 575 __ bind(after_frame_check_pop); 576 NOT_LP64(__ pop(rsi)); 577 578 // all done with frame size check 579 __ bind(after_frame_check); 580 } 581 582 // Allocate monitor and lock method (asm interpreter) 583 // 584 // Args: 585 // rbx: Method* 586 // r14/rdi: locals 587 // 588 // Kills: 589 // rax 590 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) 591 // rscratch1, rscratch2 (scratch regs) 592 void TemplateInterpreterGenerator::lock_method() { 593 // synchronize method 594 const Address access_flags(rbx, Method::access_flags_offset()); 595 const Address monitor_block_top( 596 rbp, 597 frame::interpreter_frame_monitor_block_top_offset * wordSize); 598 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 599 600 #ifdef ASSERT 601 { 602 Label L; 603 __ movl(rax, access_flags); 604 __ testl(rax, JVM_ACC_SYNCHRONIZED); 605 __ jcc(Assembler::notZero, L); 606 __ stop("method doesn't need synchronization"); 607 __ bind(L); 608 } 609 #endif // ASSERT 610 611 // get synchronization object 612 { 613 Label done; 614 __ movl(rax, access_flags); 615 __ testl(rax, JVM_ACC_STATIC); 616 // get receiver (assume this is frequent case) 617 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0))); 618 __ jcc(Assembler::zero, done); 619 __ load_mirror(rax, rbx); 620 621 #ifdef ASSERT 622 { 623 Label L; 624 __ testptr(rax, rax); 625 __ jcc(Assembler::notZero, L); 626 __ stop("synchronization object is NULL"); 627 __ bind(L); 628 } 629 #endif // ASSERT 630 631 __ bind(done); 632 } 633 634 // add space for monitor & lock 635 __ subptr(rsp, entry_size); // add space for a monitor entry 636 __ movptr(monitor_block_top, rsp); // set new monitor block top 637 // store object 638 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); 639 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 640 __ movptr(lockreg, rsp); // object address 641 __ lock_object(lockreg); 642 } 643 644 // Generate a fixed interpreter frame. This is identical setup for 645 // interpreted methods and for native methods hence the shared code. 646 // 647 // Args: 648 // rax: return address 649 // rbx: Method* 650 // r14/rdi: pointer to locals 651 // r13/rsi: sender sp 652 // rdx: cp cache 653 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 654 // initialize fixed part of activation frame 655 __ push(rax); // save return address 656 __ enter(); // save old & set new rbp 657 __ push(rbcp); // set sender sp 658 __ push((int)NULL_WORD); // leave last_sp as null 659 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod* 660 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase 661 __ push(rbx); // save Method* 662 // Get mirror and store it in the frame as GC root for this Method* 663 __ load_mirror(rdx, rbx); 664 __ push(rdx); 665 if (ProfileInterpreter) { 666 Label method_data_continue; 667 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset()))); 668 __ testptr(rdx, rdx); 669 __ jcc(Assembler::zero, method_data_continue); 670 __ addptr(rdx, in_bytes(MethodData::data_offset())); 671 __ bind(method_data_continue); 672 __ push(rdx); // set the mdp (method data pointer) 673 } else { 674 __ push(0); 675 } 676 677 __ movptr(rdx, Address(rbx, Method::const_offset())); 678 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); 679 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); 680 __ push(rdx); // set constant pool cache 681 __ push(rlocals); // set locals pointer 682 if (native_call) { 683 __ push(0); // no bcp 684 } else { 685 __ push(rbcp); // set bcp 686 } 687 __ push(0); // reserve word for pointer to expression stack bottom 688 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom 689 } 690 691 // End of helpers 692 693 // Method entry for java.lang.ref.Reference.get. 694 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { 695 #if INCLUDE_ALL_GCS 696 // Code: _aload_0, _getfield, _areturn 697 // parameter size = 1 698 // 699 // The code that gets generated by this routine is split into 2 parts: 700 // 1. The "intrinsified" code for G1 (or any SATB based GC), 701 // 2. The slow path - which is an expansion of the regular method entry. 702 // 703 // Notes:- 704 // * In the G1 code we do not check whether we need to block for 705 // a safepoint. If G1 is enabled then we must execute the specialized 706 // code for Reference.get (except when the Reference object is null) 707 // so that we can log the value in the referent field with an SATB 708 // update buffer. 709 // If the code for the getfield template is modified so that the 710 // G1 pre-barrier code is executed when the current method is 711 // Reference.get() then going through the normal method entry 712 // will be fine. 713 // * The G1 code can, however, check the receiver object (the instance 714 // of java.lang.Reference) and jump to the slow path if null. If the 715 // Reference object is null then we obviously cannot fetch the referent 716 // and so we don't need to call the G1 pre-barrier. Thus we can use the 717 // regular method entry code to generate the NPE. 718 // 719 // rbx: Method* 720 721 // r13: senderSP must preserve for slow path, set SP to it on fast path 722 723 address entry = __ pc(); 724 725 const int referent_offset = java_lang_ref_Reference::referent_offset; 726 guarantee(referent_offset > 0, "referent offset not initialized"); 727 728 if (UseG1GC) { 729 Label slow_path; 730 // rbx: method 731 732 // Check if local 0 != NULL 733 // If the receiver is null then it is OK to jump to the slow path. 734 __ movptr(rax, Address(rsp, wordSize)); 735 736 __ testptr(rax, rax); 737 __ jcc(Assembler::zero, slow_path); 738 739 // rax: local 0 740 // rbx: method (but can be used as scratch now) 741 // rdx: scratch 742 // rdi: scratch 743 744 // Preserve the sender sp in case the pre-barrier 745 // calls the runtime 746 NOT_LP64(__ push(rsi)); 747 748 // Generate the G1 pre-barrier code to log the value of 749 // the referent field in an SATB buffer. 750 751 // Load the value of the referent field. 752 const Address field_address(rax, referent_offset); 753 __ load_heap_oop(rax, field_address); 754 755 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13); 756 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 757 NOT_LP64(__ get_thread(thread)); 758 759 // Generate the G1 pre-barrier code to log the value of 760 // the referent field in an SATB buffer. 761 __ g1_write_barrier_pre(noreg /* obj */, 762 rax /* pre_val */, 763 thread /* thread */, 764 rbx /* tmp */, 765 true /* tosca_live */, 766 true /* expand_call */); 767 768 // _areturn 769 NOT_LP64(__ pop(rsi)); // get sender sp 770 __ pop(rdi); // get return address 771 __ mov(rsp, sender_sp); // set sp to sender sp 772 __ jmp(rdi); 773 __ ret(0); 774 775 // generate a vanilla interpreter entry as the slow path 776 __ bind(slow_path); 777 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); 778 return entry; 779 } 780 #endif // INCLUDE_ALL_GCS 781 782 // If G1 is not enabled then attempt to go through the accessor entry point 783 // Reference.get is an accessor 784 return NULL; 785 } 786 787 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { 788 // Quick & dirty stack overflow checking: bang the stack & handle trap. 789 // Note that we do the banging after the frame is setup, since the exception 790 // handling code expects to find a valid interpreter frame on the stack. 791 // Doing the banging earlier fails if the caller frame is not an interpreter 792 // frame. 793 // (Also, the exception throwing code expects to unlock any synchronized 794 // method receiever, so do the banging after locking the receiver.) 795 796 // Bang each page in the shadow zone. We can't assume it's been done for 797 // an interpreter frame with greater than a page of locals, so each page 798 // needs to be checked. Only true for non-native. 799 if (UseStackBanging) { 800 const int page_size = os::vm_page_size(); 801 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size; 802 const int start_page = native_call ? n_shadow_pages : 1; 803 for (int pages = start_page; pages <= n_shadow_pages; pages++) { 804 __ bang_stack_with_offset(pages*page_size); 805 } 806 } 807 } 808 809 // Interpreter stub for calling a native method. (asm interpreter) 810 // This sets up a somewhat different looking stack for calling the 811 // native method than the typical interpreter frame setup. 812 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { 813 // determine code generation flags 814 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 815 816 // rbx: Method* 817 // rbcp: sender sp 818 819 address entry_point = __ pc(); 820 821 const Address constMethod (rbx, Method::const_offset()); 822 const Address access_flags (rbx, Method::access_flags_offset()); 823 const Address size_of_parameters(rcx, ConstMethod:: 824 size_of_parameters_offset()); 825 826 827 // get parameter size (always needed) 828 __ movptr(rcx, constMethod); 829 __ load_unsigned_short(rcx, size_of_parameters); 830 831 // native calls don't need the stack size check since they have no 832 // expression stack and the arguments are already on the stack and 833 // we only add a handful of words to the stack 834 835 // rbx: Method* 836 // rcx: size of parameters 837 // rbcp: sender sp 838 __ pop(rax); // get return address 839 840 // for natives the size of locals is zero 841 842 // compute beginning of parameters 843 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 844 845 // add 2 zero-initialized slots for native calls 846 // initialize result_handler slot 847 __ push((int) NULL_WORD); 848 // slot for oop temp 849 // (static native method holder mirror/jni oop result) 850 __ push((int) NULL_WORD); 851 852 // initialize fixed part of activation frame 853 generate_fixed_frame(true); 854 855 // make sure method is native & not abstract 856 #ifdef ASSERT 857 __ movl(rax, access_flags); 858 { 859 Label L; 860 __ testl(rax, JVM_ACC_NATIVE); 861 __ jcc(Assembler::notZero, L); 862 __ stop("tried to execute non-native method as native"); 863 __ bind(L); 864 } 865 { 866 Label L; 867 __ testl(rax, JVM_ACC_ABSTRACT); 868 __ jcc(Assembler::zero, L); 869 __ stop("tried to execute abstract method in interpreter"); 870 __ bind(L); 871 } 872 #endif 873 874 // Since at this point in the method invocation the exception handler 875 // would try to exit the monitor of synchronized methods which hasn't 876 // been entered yet, we set the thread local variable 877 // _do_not_unlock_if_synchronized to true. The remove_activation will 878 // check this flag. 879 880 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread); 881 NOT_LP64(__ get_thread(thread1)); 882 const Address do_not_unlock_if_synchronized(thread1, 883 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 884 __ movbool(do_not_unlock_if_synchronized, true); 885 886 // increment invocation count & check for overflow 887 Label invocation_counter_overflow; 888 if (inc_counter) { 889 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 890 } 891 892 Label continue_after_compile; 893 __ bind(continue_after_compile); 894 895 bang_stack_shadow_pages(true); 896 897 // reset the _do_not_unlock_if_synchronized flag 898 NOT_LP64(__ get_thread(thread1)); 899 __ movbool(do_not_unlock_if_synchronized, false); 900 901 // check for synchronized methods 902 // Must happen AFTER invocation_counter check and stack overflow check, 903 // so method is not locked if overflows. 904 if (synchronized) { 905 lock_method(); 906 } else { 907 // no synchronization necessary 908 #ifdef ASSERT 909 { 910 Label L; 911 __ movl(rax, access_flags); 912 __ testl(rax, JVM_ACC_SYNCHRONIZED); 913 __ jcc(Assembler::zero, L); 914 __ stop("method needs synchronization"); 915 __ bind(L); 916 } 917 #endif 918 } 919 920 // start execution 921 #ifdef ASSERT 922 { 923 Label L; 924 const Address monitor_block_top(rbp, 925 frame::interpreter_frame_monitor_block_top_offset * wordSize); 926 __ movptr(rax, monitor_block_top); 927 __ cmpptr(rax, rsp); 928 __ jcc(Assembler::equal, L); 929 __ stop("broken stack frame setup in interpreter"); 930 __ bind(L); 931 } 932 #endif 933 934 // jvmti support 935 __ notify_method_entry(); 936 937 // work registers 938 const Register method = rbx; 939 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread); 940 const Register t = NOT_LP64(rcx) LP64_ONLY(r11); 941 942 // allocate space for parameters 943 __ get_method(method); 944 __ movptr(t, Address(method, Method::const_offset())); 945 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); 946 947 #ifndef _LP64 948 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes. 949 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror 950 __ subptr(rsp, t); 951 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics 952 #else 953 __ shll(t, Interpreter::logStackElementSize); 954 955 __ subptr(rsp, t); 956 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 957 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) 958 #endif // _LP64 959 960 // get signature handler 961 { 962 Label L; 963 __ movptr(t, Address(method, Method::signature_handler_offset())); 964 __ testptr(t, t); 965 __ jcc(Assembler::notZero, L); 966 __ call_VM(noreg, 967 CAST_FROM_FN_PTR(address, 968 InterpreterRuntime::prepare_native_call), 969 method); 970 __ get_method(method); 971 __ movptr(t, Address(method, Method::signature_handler_offset())); 972 __ bind(L); 973 } 974 975 // call signature handler 976 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals, 977 "adjust this code"); 978 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp, 979 "adjust this code"); 980 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1), 981 "adjust this code"); 982 983 // The generated handlers do not touch RBX (the method oop). 984 // However, large signatures cannot be cached and are generated 985 // each time here. The slow-path generator can do a GC on return, 986 // so we must reload it after the call. 987 __ call(t); 988 __ get_method(method); // slow path can do a GC, reload RBX 989 990 991 // result handler is in rax 992 // set result handler 993 __ movptr(Address(rbp, 994 (frame::interpreter_frame_result_handler_offset) * wordSize), 995 rax); 996 997 // pass mirror handle if static call 998 { 999 Label L; 1000 __ movl(t, Address(method, Method::access_flags_offset())); 1001 __ testl(t, JVM_ACC_STATIC); 1002 __ jcc(Assembler::zero, L); 1003 // get mirror 1004 __ load_mirror(t, method); 1005 // copy mirror into activation frame 1006 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), 1007 t); 1008 // pass handle to mirror 1009 #ifndef _LP64 1010 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 1011 __ movptr(Address(rsp, wordSize), t); 1012 #else 1013 __ lea(c_rarg1, 1014 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 1015 #endif // _LP64 1016 __ bind(L); 1017 } 1018 1019 // get native function entry point 1020 { 1021 Label L; 1022 __ movptr(rax, Address(method, Method::native_function_offset())); 1023 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 1024 __ cmpptr(rax, unsatisfied.addr()); 1025 __ jcc(Assembler::notEqual, L); 1026 __ call_VM(noreg, 1027 CAST_FROM_FN_PTR(address, 1028 InterpreterRuntime::prepare_native_call), 1029 method); 1030 __ get_method(method); 1031 __ movptr(rax, Address(method, Method::native_function_offset())); 1032 __ bind(L); 1033 } 1034 1035 // pass JNIEnv 1036 #ifndef _LP64 1037 __ get_thread(thread); 1038 __ lea(t, Address(thread, JavaThread::jni_environment_offset())); 1039 __ movptr(Address(rsp, 0), t); 1040 1041 // set_last_Java_frame_before_call 1042 // It is enough that the pc() 1043 // points into the right code segment. It does not have to be the correct return pc. 1044 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 1045 #else 1046 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset())); 1047 1048 // It is enough that the pc() points into the right code 1049 // segment. It does not have to be the correct return pc. 1050 __ set_last_Java_frame(rsp, rbp, (address) __ pc()); 1051 #endif // _LP64 1052 1053 // change thread state 1054 #ifdef ASSERT 1055 { 1056 Label L; 1057 __ movl(t, Address(thread, JavaThread::thread_state_offset())); 1058 __ cmpl(t, _thread_in_Java); 1059 __ jcc(Assembler::equal, L); 1060 __ stop("Wrong thread state in native stub"); 1061 __ bind(L); 1062 } 1063 #endif 1064 1065 // Change state to native 1066 1067 __ movl(Address(thread, JavaThread::thread_state_offset()), 1068 _thread_in_native); 1069 1070 // Call the native method. 1071 __ call(rax); 1072 // 32: result potentially in rdx:rax or ST0 1073 // 64: result potentially in rax or xmm0 1074 1075 // Verify or restore cpu control state after JNI call 1076 __ restore_cpu_control_state_after_jni(); 1077 1078 // NOTE: The order of these pushes is known to frame::interpreter_frame_result 1079 // in order to extract the result of a method call. If the order of these 1080 // pushes change or anything else is added to the stack then the code in 1081 // interpreter_frame_result must also change. 1082 1083 #ifndef _LP64 1084 // save potential result in ST(0) & rdx:rax 1085 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 - 1086 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers) 1087 // It is safe to do this push because state is _thread_in_native and return address will be found 1088 // via _last_native_pc and not via _last_jave_sp 1089 1090 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result. 1091 // If the order changes or anything else is added to the stack the code in 1092 // interpreter_frame_result will have to be changed. 1093 1094 { Label L; 1095 Label push_double; 1096 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); 1097 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); 1098 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1099 float_handler.addr()); 1100 __ jcc(Assembler::equal, push_double); 1101 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1102 double_handler.addr()); 1103 __ jcc(Assembler::notEqual, L); 1104 __ bind(push_double); 1105 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0). 1106 __ bind(L); 1107 } 1108 #else 1109 __ push(dtos); 1110 #endif // _LP64 1111 1112 __ push(ltos); 1113 1114 // change thread state 1115 NOT_LP64(__ get_thread(thread)); 1116 __ movl(Address(thread, JavaThread::thread_state_offset()), 1117 _thread_in_native_trans); 1118 1119 if (os::is_MP()) { 1120 if (UseMembar) { 1121 // Force this write out before the read below 1122 __ membar(Assembler::Membar_mask_bits( 1123 Assembler::LoadLoad | Assembler::LoadStore | 1124 Assembler::StoreLoad | Assembler::StoreStore)); 1125 } else { 1126 // Write serialization page so VM thread can do a pseudo remote membar. 1127 // We use the current thread pointer to calculate a thread specific 1128 // offset to write to within the page. This minimizes bus traffic 1129 // due to cache line collision. 1130 __ serialize_memory(thread, rcx); 1131 } 1132 } 1133 1134 #ifndef _LP64 1135 if (AlwaysRestoreFPU) { 1136 // Make sure the control word is correct. 1137 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1138 } 1139 #endif // _LP64 1140 1141 // check for safepoint operation in progress and/or pending suspend requests 1142 { 1143 Label Continue; 1144 Label slow_path; 1145 1146 #ifndef _LP64 1147 __ safepoint_poll(slow_path); 1148 #else 1149 __ safepoint_poll(slow_path, r15_thread, rscratch1); 1150 #endif 1151 1152 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); 1153 __ jcc(Assembler::equal, Continue); 1154 __ bind(slow_path); 1155 1156 // Don't use call_VM as it will see a possible pending exception 1157 // and forward it and never return here preventing us from 1158 // clearing _last_native_pc down below. Also can't use 1159 // call_VM_leaf either as it will check to see if r13 & r14 are 1160 // preserved and correspond to the bcp/locals pointers. So we do a 1161 // runtime call by hand. 1162 // 1163 #ifndef _LP64 1164 __ push(thread); 1165 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, 1166 JavaThread::check_special_condition_for_native_trans))); 1167 __ increment(rsp, wordSize); 1168 __ get_thread(thread); 1169 #else 1170 __ mov(c_rarg0, r15_thread); 1171 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1172 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1173 __ andptr(rsp, -16); // align stack as required by ABI 1174 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); 1175 __ mov(rsp, r12); // restore sp 1176 __ reinit_heapbase(); 1177 #endif // _LP64 1178 __ bind(Continue); 1179 } 1180 1181 // change thread state 1182 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); 1183 1184 // reset_last_Java_frame 1185 __ reset_last_Java_frame(thread, true); 1186 1187 if (CheckJNICalls) { 1188 // clear_pending_jni_exception_check 1189 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD); 1190 } 1191 1192 // reset handle block 1193 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); 1194 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); 1195 1196 // If result is an oop unbox and store it in frame where gc will see it 1197 // and result handler will pick it up 1198 1199 { 1200 Label no_oop, not_weak, store_result; 1201 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); 1202 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); 1203 __ jcc(Assembler::notEqual, no_oop); 1204 // retrieve result 1205 __ pop(ltos); 1206 // Unbox oop result, e.g. JNIHandles::resolve value. 1207 __ resolve_jobject(rax /* value */, 1208 thread /* thread */, 1209 t /* tmp */); 1210 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax); 1211 // keep stack depth as expected by pushing oop which will eventually be discarded 1212 __ push(ltos); 1213 __ bind(no_oop); 1214 } 1215 1216 1217 { 1218 Label no_reguard; 1219 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), 1220 JavaThread::stack_guard_yellow_reserved_disabled); 1221 __ jcc(Assembler::notEqual, no_reguard); 1222 1223 __ pusha(); // XXX only save smashed registers 1224 #ifndef _LP64 1225 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1226 __ popa(); 1227 #else 1228 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1229 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1230 __ andptr(rsp, -16); // align stack as required by ABI 1231 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1232 __ mov(rsp, r12); // restore sp 1233 __ popa(); // XXX only restore smashed registers 1234 __ reinit_heapbase(); 1235 #endif // _LP64 1236 1237 __ bind(no_reguard); 1238 } 1239 1240 1241 // The method register is junk from after the thread_in_native transition 1242 // until here. Also can't call_VM until the bcp has been 1243 // restored. Need bcp for throwing exception below so get it now. 1244 __ get_method(method); 1245 1246 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base() 1247 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod* 1248 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase 1249 1250 // handle exceptions (exception handling will handle unlocking!) 1251 { 1252 Label L; 1253 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 1254 __ jcc(Assembler::zero, L); 1255 // Note: At some point we may want to unify this with the code 1256 // used in call_VM_base(); i.e., we should use the 1257 // StubRoutines::forward_exception code. For now this doesn't work 1258 // here because the rsp is not correctly set at this point. 1259 __ MacroAssembler::call_VM(noreg, 1260 CAST_FROM_FN_PTR(address, 1261 InterpreterRuntime::throw_pending_exception)); 1262 __ should_not_reach_here(); 1263 __ bind(L); 1264 } 1265 1266 // do unlocking if necessary 1267 { 1268 Label L; 1269 __ movl(t, Address(method, Method::access_flags_offset())); 1270 __ testl(t, JVM_ACC_SYNCHRONIZED); 1271 __ jcc(Assembler::zero, L); 1272 // the code below should be shared with interpreter macro 1273 // assembler implementation 1274 { 1275 Label unlock; 1276 // BasicObjectLock will be first in list, since this is a 1277 // synchronized method. However, need to check that the object 1278 // has not been unlocked by an explicit monitorexit bytecode. 1279 const Address monitor(rbp, 1280 (intptr_t)(frame::interpreter_frame_initial_sp_offset * 1281 wordSize - (int)sizeof(BasicObjectLock))); 1282 1283 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 1284 1285 // monitor expect in c_rarg1 for slow unlock path 1286 __ lea(regmon, monitor); // address of first monitor 1287 1288 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes())); 1289 __ testptr(t, t); 1290 __ jcc(Assembler::notZero, unlock); 1291 1292 // Entry already unlocked, need to throw exception 1293 __ MacroAssembler::call_VM(noreg, 1294 CAST_FROM_FN_PTR(address, 1295 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1296 __ should_not_reach_here(); 1297 1298 __ bind(unlock); 1299 __ unlock_object(regmon); 1300 } 1301 __ bind(L); 1302 } 1303 1304 // jvmti support 1305 // Note: This must happen _after_ handling/throwing any exceptions since 1306 // the exception handler code notifies the runtime of method exits 1307 // too. If this happens before, method entry/exit notifications are 1308 // not properly paired (was bug - gri 11/22/99). 1309 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1310 1311 // restore potential result in edx:eax, call result handler to 1312 // restore potential result in ST0 & handle result 1313 1314 __ pop(ltos); 1315 LP64_ONLY( __ pop(dtos)); 1316 1317 __ movptr(t, Address(rbp, 1318 (frame::interpreter_frame_result_handler_offset) * wordSize)); 1319 __ call(t); 1320 1321 // remove activation 1322 __ movptr(t, Address(rbp, 1323 frame::interpreter_frame_sender_sp_offset * 1324 wordSize)); // get sender sp 1325 __ leave(); // remove frame anchor 1326 __ pop(rdi); // get return address 1327 __ mov(rsp, t); // set sp to sender sp 1328 __ jmp(rdi); 1329 1330 if (inc_counter) { 1331 // Handle overflow of counter and compile method 1332 __ bind(invocation_counter_overflow); 1333 generate_counter_overflow(continue_after_compile); 1334 } 1335 1336 return entry_point; 1337 } 1338 1339 // Abstract method entry 1340 // Attempt to execute abstract method. Throw exception 1341 address TemplateInterpreterGenerator::generate_abstract_entry(void) { 1342 1343 address entry_point = __ pc(); 1344 1345 // abstract method entry 1346 1347 // pop return address, reset last_sp to NULL 1348 __ empty_expression_stack(); 1349 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed) 1350 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 1351 1352 // throw exception 1353 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); 1354 // the call_VM checks for exception, so we should never return here. 1355 __ should_not_reach_here(); 1356 1357 return entry_point; 1358 } 1359 1360 // 1361 // Generic interpreted method entry to (asm) interpreter 1362 // 1363 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { 1364 // determine code generation flags 1365 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1366 1367 // ebx: Method* 1368 // rbcp: sender sp 1369 address entry_point = __ pc(); 1370 1371 const Address constMethod(rbx, Method::const_offset()); 1372 const Address access_flags(rbx, Method::access_flags_offset()); 1373 const Address size_of_parameters(rdx, 1374 ConstMethod::size_of_parameters_offset()); 1375 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset()); 1376 1377 1378 // get parameter size (always needed) 1379 __ movptr(rdx, constMethod); 1380 __ load_unsigned_short(rcx, size_of_parameters); 1381 1382 // rbx: Method* 1383 // rcx: size of parameters 1384 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i ) 1385 1386 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words 1387 __ subl(rdx, rcx); // rdx = no. of additional locals 1388 1389 // YYY 1390 // __ incrementl(rdx); 1391 // __ andl(rdx, -2); 1392 1393 // see if we've got enough room on the stack for locals plus overhead. 1394 generate_stack_overflow_check(); 1395 1396 // get return address 1397 __ pop(rax); 1398 1399 // compute beginning of parameters 1400 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 1401 1402 // rdx - # of additional locals 1403 // allocate space for locals 1404 // explicitly initialize locals 1405 { 1406 Label exit, loop; 1407 __ testl(rdx, rdx); 1408 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 1409 __ bind(loop); 1410 __ push((int) NULL_WORD); // initialize local variables 1411 __ decrementl(rdx); // until everything initialized 1412 __ jcc(Assembler::greater, loop); 1413 __ bind(exit); 1414 } 1415 1416 // initialize fixed part of activation frame 1417 generate_fixed_frame(false); 1418 1419 // make sure method is not native & not abstract 1420 #ifdef ASSERT 1421 __ movl(rax, access_flags); 1422 { 1423 Label L; 1424 __ testl(rax, JVM_ACC_NATIVE); 1425 __ jcc(Assembler::zero, L); 1426 __ stop("tried to execute native method as non-native"); 1427 __ bind(L); 1428 } 1429 { 1430 Label L; 1431 __ testl(rax, JVM_ACC_ABSTRACT); 1432 __ jcc(Assembler::zero, L); 1433 __ stop("tried to execute abstract method in interpreter"); 1434 __ bind(L); 1435 } 1436 #endif 1437 1438 // Since at this point in the method invocation the exception 1439 // handler would try to exit the monitor of synchronized methods 1440 // which hasn't been entered yet, we set the thread local variable 1441 // _do_not_unlock_if_synchronized to true. The remove_activation 1442 // will check this flag. 1443 1444 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread); 1445 NOT_LP64(__ get_thread(thread)); 1446 const Address do_not_unlock_if_synchronized(thread, 1447 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1448 __ movbool(do_not_unlock_if_synchronized, true); 1449 1450 __ profile_parameters_type(rax, rcx, rdx); 1451 // increment invocation count & check for overflow 1452 Label invocation_counter_overflow; 1453 Label profile_method; 1454 Label profile_method_continue; 1455 if (inc_counter) { 1456 generate_counter_incr(&invocation_counter_overflow, 1457 &profile_method, 1458 &profile_method_continue); 1459 if (ProfileInterpreter) { 1460 __ bind(profile_method_continue); 1461 } 1462 } 1463 1464 Label continue_after_compile; 1465 __ bind(continue_after_compile); 1466 1467 // check for synchronized interpreted methods 1468 bang_stack_shadow_pages(false); 1469 1470 // reset the _do_not_unlock_if_synchronized flag 1471 NOT_LP64(__ get_thread(thread)); 1472 __ movbool(do_not_unlock_if_synchronized, false); 1473 1474 // check for synchronized methods 1475 // Must happen AFTER invocation_counter check and stack overflow check, 1476 // so method is not locked if overflows. 1477 if (synchronized) { 1478 // Allocate monitor and lock method 1479 lock_method(); 1480 } else { 1481 // no synchronization necessary 1482 #ifdef ASSERT 1483 { 1484 Label L; 1485 __ movl(rax, access_flags); 1486 __ testl(rax, JVM_ACC_SYNCHRONIZED); 1487 __ jcc(Assembler::zero, L); 1488 __ stop("method needs synchronization"); 1489 __ bind(L); 1490 } 1491 #endif 1492 } 1493 1494 // start execution 1495 #ifdef ASSERT 1496 { 1497 Label L; 1498 const Address monitor_block_top (rbp, 1499 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1500 __ movptr(rax, monitor_block_top); 1501 __ cmpptr(rax, rsp); 1502 __ jcc(Assembler::equal, L); 1503 __ stop("broken stack frame setup in interpreter"); 1504 __ bind(L); 1505 } 1506 #endif 1507 1508 // jvmti support 1509 __ notify_method_entry(); 1510 1511 __ dispatch_next(vtos); 1512 1513 // invocation counter overflow 1514 if (inc_counter) { 1515 if (ProfileInterpreter) { 1516 // We have decided to profile this method in the interpreter 1517 __ bind(profile_method); 1518 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1519 __ set_method_data_pointer_for_bcp(); 1520 __ get_method(rbx); 1521 __ jmp(profile_method_continue); 1522 } 1523 // Handle overflow of counter and compile method 1524 __ bind(invocation_counter_overflow); 1525 generate_counter_overflow(continue_after_compile); 1526 } 1527 1528 return entry_point; 1529 } 1530 1531 //----------------------------------------------------------------------------- 1532 // Exceptions 1533 1534 void TemplateInterpreterGenerator::generate_throw_exception() { 1535 // Entry point in previous activation (i.e., if the caller was 1536 // interpreted) 1537 Interpreter::_rethrow_exception_entry = __ pc(); 1538 // Restore sp to interpreter_frame_last_sp even though we are going 1539 // to empty the expression stack for the exception processing. 1540 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1541 // rax: exception 1542 // rdx: return address/pc that threw exception 1543 __ restore_bcp(); // r13/rsi points to call/send 1544 __ restore_locals(); 1545 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase. 1546 // Entry point for exceptions thrown within interpreter code 1547 Interpreter::_throw_exception_entry = __ pc(); 1548 // expression stack is undefined here 1549 // rax: exception 1550 // r13/rsi: exception bcp 1551 __ verify_oop(rax); 1552 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 1553 LP64_ONLY(__ mov(c_rarg1, rax)); 1554 1555 // expression stack must be empty before entering the VM in case of 1556 // an exception 1557 __ empty_expression_stack(); 1558 // find exception handler address and preserve exception oop 1559 __ call_VM(rdx, 1560 CAST_FROM_FN_PTR(address, 1561 InterpreterRuntime::exception_handler_for_exception), 1562 rarg); 1563 // rax: exception handler entry point 1564 // rdx: preserved exception oop 1565 // r13/rsi: bcp for exception handler 1566 __ push_ptr(rdx); // push exception which is now the only value on the stack 1567 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) 1568 1569 // If the exception is not handled in the current frame the frame is 1570 // removed and the exception is rethrown (i.e. exception 1571 // continuation is _rethrow_exception). 1572 // 1573 // Note: At this point the bci is still the bxi for the instruction 1574 // which caused the exception and the expression stack is 1575 // empty. Thus, for any VM calls at this point, GC will find a legal 1576 // oop map (with empty expression stack). 1577 1578 // In current activation 1579 // tos: exception 1580 // esi: exception bcp 1581 1582 // 1583 // JVMTI PopFrame support 1584 // 1585 1586 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1587 __ empty_expression_stack(); 1588 // Set the popframe_processing bit in pending_popframe_condition 1589 // indicating that we are currently handling popframe, so that 1590 // call_VMs that may happen later do not trigger new popframe 1591 // handling cycles. 1592 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 1593 NOT_LP64(__ get_thread(thread)); 1594 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset())); 1595 __ orl(rdx, JavaThread::popframe_processing_bit); 1596 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx); 1597 1598 { 1599 // Check to see whether we are returning to a deoptimized frame. 1600 // (The PopFrame call ensures that the caller of the popped frame is 1601 // either interpreted or compiled and deoptimizes it if compiled.) 1602 // In this case, we can't call dispatch_next() after the frame is 1603 // popped, but instead must save the incoming arguments and restore 1604 // them after deoptimization has occurred. 1605 // 1606 // Note that we don't compare the return PC against the 1607 // deoptimization blob's unpack entry because of the presence of 1608 // adapter frames in C2. 1609 Label caller_not_deoptimized; 1610 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 1611 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize)); 1612 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1613 InterpreterRuntime::interpreter_contains), rarg); 1614 __ testl(rax, rax); 1615 __ jcc(Assembler::notZero, caller_not_deoptimized); 1616 1617 // Compute size of arguments for saving when returning to 1618 // deoptimized caller 1619 __ get_method(rax); 1620 __ movptr(rax, Address(rax, Method::const_offset())); 1621 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod:: 1622 size_of_parameters_offset()))); 1623 __ shll(rax, Interpreter::logStackElementSize); 1624 __ restore_locals(); 1625 __ subptr(rlocals, rax); 1626 __ addptr(rlocals, wordSize); 1627 // Save these arguments 1628 NOT_LP64(__ get_thread(thread)); 1629 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1630 Deoptimization:: 1631 popframe_preserve_args), 1632 thread, rax, rlocals); 1633 1634 __ remove_activation(vtos, rdx, 1635 /* throw_monitor_exception */ false, 1636 /* install_monitor_exception */ false, 1637 /* notify_jvmdi */ false); 1638 1639 // Inform deoptimization that it is responsible for restoring 1640 // these arguments 1641 NOT_LP64(__ get_thread(thread)); 1642 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1643 JavaThread::popframe_force_deopt_reexecution_bit); 1644 1645 // Continue in deoptimization handler 1646 __ jmp(rdx); 1647 1648 __ bind(caller_not_deoptimized); 1649 } 1650 1651 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */ 1652 /* throw_monitor_exception */ false, 1653 /* install_monitor_exception */ false, 1654 /* notify_jvmdi */ false); 1655 1656 // Finish with popframe handling 1657 // A previous I2C followed by a deoptimization might have moved the 1658 // outgoing arguments further up the stack. PopFrame expects the 1659 // mutations to those outgoing arguments to be preserved and other 1660 // constraints basically require this frame to look exactly as 1661 // though it had previously invoked an interpreted activation with 1662 // no space between the top of the expression stack (current 1663 // last_sp) and the top of stack. Rather than force deopt to 1664 // maintain this kind of invariant all the time we call a small 1665 // fixup routine to move the mutated arguments onto the top of our 1666 // expression stack if necessary. 1667 #ifndef _LP64 1668 __ mov(rax, rsp); 1669 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1670 __ get_thread(thread); 1671 // PC must point into interpreter here 1672 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 1673 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx); 1674 __ get_thread(thread); 1675 #else 1676 __ mov(c_rarg1, rsp); 1677 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1678 // PC must point into interpreter here 1679 __ set_last_Java_frame(noreg, rbp, __ pc()); 1680 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2); 1681 #endif 1682 __ reset_last_Java_frame(thread, true); 1683 1684 // Restore the last_sp and null it out 1685 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1686 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1687 1688 __ restore_bcp(); 1689 __ restore_locals(); 1690 // The method data pointer was incremented already during 1691 // call profiling. We have to restore the mdp for the current bcp. 1692 if (ProfileInterpreter) { 1693 __ set_method_data_pointer_for_bcp(); 1694 } 1695 1696 // Clear the popframe condition flag 1697 NOT_LP64(__ get_thread(thread)); 1698 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1699 JavaThread::popframe_inactive); 1700 1701 #if INCLUDE_JVMTI 1702 { 1703 Label L_done; 1704 const Register local0 = rlocals; 1705 1706 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic); 1707 __ jcc(Assembler::notEqual, L_done); 1708 1709 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. 1710 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. 1711 1712 __ get_method(rdx); 1713 __ movptr(rax, Address(local0, 0)); 1714 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp); 1715 1716 __ testptr(rax, rax); 1717 __ jcc(Assembler::zero, L_done); 1718 1719 __ movptr(Address(rbx, 0), rax); 1720 __ bind(L_done); 1721 } 1722 #endif // INCLUDE_JVMTI 1723 1724 __ dispatch_next(vtos); 1725 // end of PopFrame support 1726 1727 Interpreter::_remove_activation_entry = __ pc(); 1728 1729 // preserve exception over this code sequence 1730 __ pop_ptr(rax); 1731 NOT_LP64(__ get_thread(thread)); 1732 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax); 1733 // remove the activation (without doing throws on illegalMonitorExceptions) 1734 __ remove_activation(vtos, rdx, false, true, false); 1735 // restore exception 1736 NOT_LP64(__ get_thread(thread)); 1737 __ get_vm_result(rax, thread); 1738 1739 // In between activations - previous activation type unknown yet 1740 // compute continuation point - the continuation point expects the 1741 // following registers set up: 1742 // 1743 // rax: exception 1744 // rdx: return address/pc that threw exception 1745 // rsp: expression stack of caller 1746 // rbp: ebp of caller 1747 __ push(rax); // save exception 1748 __ push(rdx); // save return address 1749 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1750 SharedRuntime::exception_handler_for_return_address), 1751 thread, rdx); 1752 __ mov(rbx, rax); // save exception handler 1753 __ pop(rdx); // restore return address 1754 __ pop(rax); // restore exception 1755 // Note that an "issuing PC" is actually the next PC after the call 1756 __ jmp(rbx); // jump to exception 1757 // handler of caller 1758 } 1759 1760 1761 // 1762 // JVMTI ForceEarlyReturn support 1763 // 1764 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1765 address entry = __ pc(); 1766 1767 __ restore_bcp(); 1768 __ restore_locals(); 1769 __ empty_expression_stack(); 1770 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse 1771 1772 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 1773 NOT_LP64(__ get_thread(thread)); 1774 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 1775 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset()); 1776 1777 // Clear the earlyret state 1778 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); 1779 1780 __ remove_activation(state, rsi, 1781 false, /* throw_monitor_exception */ 1782 false, /* install_monitor_exception */ 1783 true); /* notify_jvmdi */ 1784 __ jmp(rsi); 1785 1786 return entry; 1787 } // end of ForceEarlyReturn support 1788 1789 1790 //----------------------------------------------------------------------------- 1791 // Helper for vtos entry point generation 1792 1793 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 1794 address& bep, 1795 address& cep, 1796 address& sep, 1797 address& aep, 1798 address& iep, 1799 address& lep, 1800 address& fep, 1801 address& dep, 1802 address& vep) { 1803 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1804 Label L; 1805 aep = __ pc(); __ push_ptr(); __ jmp(L); 1806 #ifndef _LP64 1807 fep = __ pc(); __ push(ftos); __ jmp(L); 1808 dep = __ pc(); __ push(dtos); __ jmp(L); 1809 #else 1810 fep = __ pc(); __ push_f(xmm0); __ jmp(L); 1811 dep = __ pc(); __ push_d(xmm0); __ jmp(L); 1812 #endif // _LP64 1813 lep = __ pc(); __ push_l(); __ jmp(L); 1814 bep = cep = sep = 1815 iep = __ pc(); __ push_i(); 1816 vep = __ pc(); 1817 __ bind(L); 1818 generate_and_dispatch(t); 1819 } 1820 1821 //----------------------------------------------------------------------------- 1822 1823 // Non-product code 1824 #ifndef PRODUCT 1825 1826 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1827 address entry = __ pc(); 1828 1829 #ifndef _LP64 1830 // prepare expression stack 1831 __ pop(rcx); // pop return address so expression stack is 'pure' 1832 __ push(state); // save tosca 1833 1834 // pass tosca registers as arguments & call tracer 1835 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx); 1836 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state) 1837 __ pop(state); // restore tosca 1838 1839 // return 1840 __ jmp(rcx); 1841 #else 1842 __ push(state); 1843 __ push(c_rarg0); 1844 __ push(c_rarg1); 1845 __ push(c_rarg2); 1846 __ push(c_rarg3); 1847 __ mov(c_rarg2, rax); // Pass itos 1848 #ifdef _WIN64 1849 __ movflt(xmm3, xmm0); // Pass ftos 1850 #endif 1851 __ call_VM(noreg, 1852 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), 1853 c_rarg1, c_rarg2, c_rarg3); 1854 __ pop(c_rarg3); 1855 __ pop(c_rarg2); 1856 __ pop(c_rarg1); 1857 __ pop(c_rarg0); 1858 __ pop(state); 1859 __ ret(0); // return from result handler 1860 #endif // _LP64 1861 1862 return entry; 1863 } 1864 1865 void TemplateInterpreterGenerator::count_bytecode() { 1866 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); 1867 } 1868 1869 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 1870 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); 1871 } 1872 1873 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 1874 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index)); 1875 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); 1876 __ orl(rbx, 1877 ((int) t->bytecode()) << 1878 BytecodePairHistogram::log2_number_of_codes); 1879 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); 1880 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters)); 1881 __ incrementl(Address(rscratch1, rbx, Address::times_4)); 1882 } 1883 1884 1885 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 1886 // Call a little run-time stub to avoid blow-up for each bytecode. 1887 // The run-time runtime saves the right registers, depending on 1888 // the tosca in-state for the given template. 1889 1890 assert(Interpreter::trace_code(t->tos_in()) != NULL, 1891 "entry must have been generated"); 1892 #ifndef _LP64 1893 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1894 #else 1895 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1896 __ andptr(rsp, -16); // align stack as required by ABI 1897 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1898 __ mov(rsp, r12); // restore sp 1899 __ reinit_heapbase(); 1900 #endif // _LP64 1901 } 1902 1903 1904 void TemplateInterpreterGenerator::stop_interpreter_at() { 1905 Label L; 1906 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), 1907 StopInterpreterAt); 1908 __ jcc(Assembler::notEqual, L); 1909 __ int3(); 1910 __ bind(L); 1911 } 1912 #endif // !PRODUCT