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 if (state == qtos && ValueTypeReturnedAsFields) { 207 // A value type is being returned. If fields are in registers we 208 // need to allocate a value type instance and initialize it with 209 // the value of the fields. 210 __ super_call_VM_leaf(StubRoutines::store_value_type_fields_to_buf()); 211 } 212 213 __ restore_bcp(); 214 __ restore_locals(); 215 216 if (state == atos) { 217 Register mdp = rbx; 218 Register tmp = rcx; 219 __ profile_return_type(mdp, rax, tmp); 220 } 221 222 const Register cache = rbx; 223 const Register index = rcx; 224 __ get_cache_and_index_at_bcp(cache, index, 1, index_size); 225 226 const Register flags = cache; 227 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); 228 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask); 229 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale())); 230 231 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 232 if (JvmtiExport::can_pop_frame()) { 233 NOT_LP64(__ get_thread(java_thread)); 234 __ check_and_handle_popframe(java_thread); 235 } 236 if (JvmtiExport::can_force_early_return()) { 237 NOT_LP64(__ get_thread(java_thread)); 238 __ check_and_handle_earlyret(java_thread); 239 } 240 241 __ dispatch_next(state, step); 242 243 return entry; 244 } 245 246 247 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { 248 address entry = __ pc(); 249 250 #ifndef _LP64 251 if (state == ftos) { 252 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter"); 253 } else if (state == dtos) { 254 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter"); 255 } 256 #endif // _LP64 257 258 // NULL last_sp until next java call 259 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 260 __ restore_bcp(); 261 __ restore_locals(); 262 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 263 NOT_LP64(__ get_thread(thread)); 264 #if INCLUDE_JVMCI 265 // Check if we need to take lock at entry of synchronized method. This can 266 // only occur on method entry so emit it only for vtos with step 0. 267 if ((UseJVMCICompiler || UseAOT) && state == vtos && step == 0) { 268 Label L; 269 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 270 __ jcc(Assembler::zero, L); 271 // Clear flag. 272 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); 273 // Satisfy calling convention for lock_method(). 274 __ get_method(rbx); 275 // Take lock. 276 lock_method(); 277 __ bind(L); 278 } else { 279 #ifdef ASSERT 280 if (UseJVMCICompiler) { 281 Label L; 282 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0); 283 __ jccb(Assembler::zero, L); 284 __ stop("unexpected pending monitor in deopt entry"); 285 __ bind(L); 286 } 287 #endif 288 } 289 #endif 290 // handle exceptions 291 { 292 Label L; 293 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 294 __ jcc(Assembler::zero, L); 295 __ call_VM(noreg, 296 CAST_FROM_FN_PTR(address, 297 InterpreterRuntime::throw_pending_exception)); 298 __ should_not_reach_here(); 299 __ bind(L); 300 } 301 __ dispatch_next(state, step); 302 return entry; 303 } 304 305 address TemplateInterpreterGenerator::generate_result_handler_for( 306 BasicType type) { 307 address entry = __ pc(); 308 switch (type) { 309 case T_BOOLEAN: __ c2bool(rax); break; 310 #ifndef _LP64 311 case T_CHAR : __ andptr(rax, 0xFFFF); break; 312 #else 313 case T_CHAR : __ movzwl(rax, rax); break; 314 #endif // _LP64 315 case T_BYTE : __ sign_extend_byte(rax); break; 316 case T_SHORT : __ sign_extend_short(rax); break; 317 case T_INT : /* nothing to do */ break; 318 case T_LONG : /* nothing to do */ break; 319 case T_VOID : /* nothing to do */ break; 320 #ifndef _LP64 321 case T_DOUBLE : 322 case T_FLOAT : 323 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); 324 __ pop(t); // remove return address first 325 // Must return a result for interpreter or compiler. In SSE 326 // mode, results are returned in xmm0 and the FPU stack must 327 // be empty. 328 if (type == T_FLOAT && UseSSE >= 1) { 329 // Load ST0 330 __ fld_d(Address(rsp, 0)); 331 // Store as float and empty fpu stack 332 __ fstp_s(Address(rsp, 0)); 333 // and reload 334 __ movflt(xmm0, Address(rsp, 0)); 335 } else if (type == T_DOUBLE && UseSSE >= 2 ) { 336 __ movdbl(xmm0, Address(rsp, 0)); 337 } else { 338 // restore ST0 339 __ fld_d(Address(rsp, 0)); 340 } 341 // and pop the temp 342 __ addptr(rsp, 2 * wordSize); 343 __ push(t); // restore return address 344 } 345 break; 346 #else 347 case T_FLOAT : /* nothing to do */ break; 348 case T_DOUBLE : /* nothing to do */ break; 349 #endif // _LP64 350 351 case T_VALUETYPE: // fall through (value types are handled with oops) 352 case T_OBJECT : 353 // retrieve result from frame 354 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); 355 // and verify it 356 __ verify_oop(rax); 357 break; 358 default : ShouldNotReachHere(); 359 } 360 __ ret(0); // return from result handler 361 return entry; 362 } 363 364 address TemplateInterpreterGenerator::generate_safept_entry_for( 365 TosState state, 366 address runtime_entry) { 367 address entry = __ pc(); 368 __ push(state); 369 __ call_VM(noreg, runtime_entry); 370 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 371 return entry; 372 } 373 374 375 376 // Helpers for commoning out cases in the various type of method entries. 377 // 378 379 380 // increment invocation count & check for overflow 381 // 382 // Note: checking for negative value instead of overflow 383 // so we have a 'sticky' overflow test 384 // 385 // rbx: method 386 // rcx: invocation counter 387 // 388 void TemplateInterpreterGenerator::generate_counter_incr( 389 Label* overflow, 390 Label* profile_method, 391 Label* profile_method_continue) { 392 Label done; 393 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. 394 if (TieredCompilation) { 395 int increment = InvocationCounter::count_increment; 396 Label no_mdo; 397 if (ProfileInterpreter) { 398 // Are we profiling? 399 __ movptr(rax, Address(rbx, Method::method_data_offset())); 400 __ testptr(rax, rax); 401 __ jccb(Assembler::zero, no_mdo); 402 // Increment counter in the MDO 403 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) + 404 in_bytes(InvocationCounter::counter_offset())); 405 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset())); 406 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); 407 __ jmp(done); 408 } 409 __ bind(no_mdo); 410 // Increment counter in MethodCounters 411 const Address invocation_counter(rax, 412 MethodCounters::invocation_counter_offset() + 413 InvocationCounter::counter_offset()); 414 __ get_method_counters(rbx, rax, done); 415 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset())); 416 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, 417 false, Assembler::zero, overflow); 418 __ bind(done); 419 } else { // not TieredCompilation 420 const Address backedge_counter(rax, 421 MethodCounters::backedge_counter_offset() + 422 InvocationCounter::counter_offset()); 423 const Address invocation_counter(rax, 424 MethodCounters::invocation_counter_offset() + 425 InvocationCounter::counter_offset()); 426 427 __ get_method_counters(rbx, rax, done); 428 429 if (ProfileInterpreter) { 430 __ incrementl(Address(rax, 431 MethodCounters::interpreter_invocation_counter_offset())); 432 } 433 // Update standard invocation counters 434 __ movl(rcx, invocation_counter); 435 __ incrementl(rcx, InvocationCounter::count_increment); 436 __ movl(invocation_counter, rcx); // save invocation count 437 438 __ movl(rax, backedge_counter); // load backedge counter 439 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits 440 441 __ addl(rcx, rax); // add both counters 442 443 // profile_method is non-null only for interpreted method so 444 // profile_method != NULL == !native_call 445 446 if (ProfileInterpreter && profile_method != NULL) { 447 // Test to see if we should create a method data oop 448 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 449 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); 450 __ jcc(Assembler::less, *profile_method_continue); 451 452 // if no method data exists, go to profile_method 453 __ test_method_data_pointer(rax, *profile_method); 454 } 455 456 __ movptr(rax, Address(rbx, Method::method_counters_offset())); 457 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset()))); 458 __ jcc(Assembler::aboveEqual, *overflow); 459 __ bind(done); 460 } 461 } 462 463 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { 464 465 // Asm interpreter on entry 466 // r14/rdi - locals 467 // r13/rsi - bcp 468 // rbx - method 469 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE 470 // rbp - interpreter frame 471 472 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 473 // Everything as it was on entry 474 // rdx is not restored. Doesn't appear to really be set. 475 476 // InterpreterRuntime::frequency_counter_overflow takes two 477 // arguments, the first (thread) is passed by call_VM, the second 478 // indicates if the counter overflow occurs at a backwards branch 479 // (NULL bcp). We pass zero for it. The call returns the address 480 // of the verified entry point for the method or NULL if the 481 // compilation did not complete (either went background or bailed 482 // out). 483 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 484 __ movl(rarg, 0); 485 __ call_VM(noreg, 486 CAST_FROM_FN_PTR(address, 487 InterpreterRuntime::frequency_counter_overflow), 488 rarg); 489 490 __ movptr(rbx, Address(rbp, method_offset)); // restore Method* 491 // Preserve invariant that r13/r14 contain bcp/locals of sender frame 492 // and jump to the interpreted entry. 493 __ jmp(do_continue, relocInfo::none); 494 } 495 496 // See if we've got enough room on the stack for locals plus overhead below 497 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError 498 // without going through the signal handler, i.e., reserved and yellow zones 499 // will not be made usable. The shadow zone must suffice to handle the 500 // overflow. 501 // The expression stack grows down incrementally, so the normal guard 502 // page mechanism will work for that. 503 // 504 // NOTE: Since the additional locals are also always pushed (wasn't 505 // obvious in generate_fixed_frame) so the guard should work for them 506 // too. 507 // 508 // Args: 509 // rdx: number of additional locals this frame needs (what we must check) 510 // rbx: Method* 511 // 512 // Kills: 513 // rax 514 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) { 515 516 // monitor entry size: see picture of stack in frame_x86.hpp 517 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 518 519 // total overhead size: entry_size + (saved rbp through expr stack 520 // bottom). be sure to change this if you add/subtract anything 521 // to/from the overhead area 522 const int overhead_size = 523 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; 524 525 const int page_size = os::vm_page_size(); 526 527 Label after_frame_check; 528 529 // see if the frame is greater than one page in size. If so, 530 // then we need to verify there is enough stack space remaining 531 // for the additional locals. 532 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize); 533 __ jcc(Assembler::belowEqual, after_frame_check); 534 535 // compute rsp as if this were going to be the last frame on 536 // the stack before the red zone 537 538 Label after_frame_check_pop; 539 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); 540 #ifndef _LP64 541 __ push(thread); 542 __ get_thread(thread); 543 #endif 544 545 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset()); 546 547 // locals + overhead, in bytes 548 __ mov(rax, rdx); 549 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes. 550 __ addptr(rax, overhead_size); 551 552 #ifdef ASSERT 553 Label limit_okay; 554 // Verify that thread stack overflow limit is non-zero. 555 __ cmpptr(stack_limit, (int32_t)NULL_WORD); 556 __ jcc(Assembler::notEqual, limit_okay); 557 __ stop("stack overflow limit is zero"); 558 __ bind(limit_okay); 559 #endif 560 561 // Add locals/frame size to stack limit. 562 __ addptr(rax, stack_limit); 563 564 // Check against the current stack bottom. 565 __ cmpptr(rsp, rax); 566 567 __ jcc(Assembler::above, after_frame_check_pop); 568 NOT_LP64(__ pop(rsi)); // get saved bcp 569 570 // Restore sender's sp as SP. This is necessary if the sender's 571 // frame is an extended compiled frame (see gen_c2i_adapter()) 572 // and safer anyway in case of JSR292 adaptations. 573 574 __ pop(rax); // return address must be moved if SP is changed 575 __ mov(rsp, rbcp); 576 __ push(rax); 577 578 // Note: the restored frame is not necessarily interpreted. 579 // Use the shared runtime version of the StackOverflowError. 580 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); 581 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry())); 582 // all done with frame size check 583 __ bind(after_frame_check_pop); 584 NOT_LP64(__ pop(rsi)); 585 586 // all done with frame size check 587 __ bind(after_frame_check); 588 } 589 590 // Allocate monitor and lock method (asm interpreter) 591 // 592 // Args: 593 // rbx: Method* 594 // r14/rdi: locals 595 // 596 // Kills: 597 // rax 598 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) 599 // rscratch1, rscratch2 (scratch regs) 600 void TemplateInterpreterGenerator::lock_method() { 601 // synchronize method 602 const Address access_flags(rbx, Method::access_flags_offset()); 603 const Address monitor_block_top( 604 rbp, 605 frame::interpreter_frame_monitor_block_top_offset * wordSize); 606 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 607 608 #ifdef ASSERT 609 { 610 Label L; 611 __ movl(rax, access_flags); 612 __ testl(rax, JVM_ACC_SYNCHRONIZED); 613 __ jcc(Assembler::notZero, L); 614 __ stop("method doesn't need synchronization"); 615 __ bind(L); 616 } 617 #endif // ASSERT 618 619 // get synchronization object 620 { 621 Label done; 622 __ movl(rax, access_flags); 623 __ testl(rax, JVM_ACC_STATIC); 624 // get receiver (assume this is frequent case) 625 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0))); 626 __ jcc(Assembler::zero, done); 627 __ load_mirror(rax, rbx); 628 629 #ifdef ASSERT 630 { 631 Label L; 632 __ testptr(rax, rax); 633 __ jcc(Assembler::notZero, L); 634 __ stop("synchronization object is NULL"); 635 __ bind(L); 636 } 637 #endif // ASSERT 638 639 __ bind(done); 640 } 641 642 // add space for monitor & lock 643 __ subptr(rsp, entry_size); // add space for a monitor entry 644 __ movptr(monitor_block_top, rsp); // set new monitor block top 645 // store object 646 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); 647 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 648 __ movptr(lockreg, rsp); // object address 649 __ lock_object(lockreg); 650 } 651 652 // Generate a fixed interpreter frame. This is identical setup for 653 // interpreted methods and for native methods hence the shared code. 654 // 655 // Args: 656 // rax: return address 657 // rbx: Method* 658 // r14/rdi: pointer to locals 659 // r13/rsi: sender sp 660 // rdx: cp cache 661 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 662 // initialize fixed part of activation frame 663 __ push(rax); // save return address 664 __ enter(); // save old & set new rbp 665 __ push(rbcp); // set sender sp 666 __ push((int)NULL_WORD); // leave last_sp as null 667 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod* 668 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase 669 __ push(rbx); // save Method* 670 // Get mirror and store it in the frame as GC root for this Method* 671 __ load_mirror(rdx, rbx); 672 __ push(rdx); 673 if (ProfileInterpreter) { 674 Label method_data_continue; 675 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset()))); 676 __ testptr(rdx, rdx); 677 __ jcc(Assembler::zero, method_data_continue); 678 __ addptr(rdx, in_bytes(MethodData::data_offset())); 679 __ bind(method_data_continue); 680 __ push(rdx); // set the mdp (method data pointer) 681 } else { 682 __ push(0); 683 } 684 685 __ movptr(rdx, Address(rbx, Method::const_offset())); 686 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); 687 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); 688 __ push(rdx); // set constant pool cache 689 __ push(rlocals); // set locals pointer 690 if (native_call) { 691 __ push(0); // no bcp 692 } else { 693 __ push(rbcp); // set bcp 694 } 695 __ push(0); // reserve word for pointer to expression stack bottom 696 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom 697 } 698 699 // End of helpers 700 701 // Method entry for java.lang.ref.Reference.get. 702 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { 703 #if INCLUDE_ALL_GCS 704 // Code: _aload_0, _getfield, _areturn 705 // parameter size = 1 706 // 707 // The code that gets generated by this routine is split into 2 parts: 708 // 1. The "intrinsified" code for G1 (or any SATB based GC), 709 // 2. The slow path - which is an expansion of the regular method entry. 710 // 711 // Notes:- 712 // * In the G1 code we do not check whether we need to block for 713 // a safepoint. If G1 is enabled then we must execute the specialized 714 // code for Reference.get (except when the Reference object is null) 715 // so that we can log the value in the referent field with an SATB 716 // update buffer. 717 // If the code for the getfield template is modified so that the 718 // G1 pre-barrier code is executed when the current method is 719 // Reference.get() then going through the normal method entry 720 // will be fine. 721 // * The G1 code can, however, check the receiver object (the instance 722 // of java.lang.Reference) and jump to the slow path if null. If the 723 // Reference object is null then we obviously cannot fetch the referent 724 // and so we don't need to call the G1 pre-barrier. Thus we can use the 725 // regular method entry code to generate the NPE. 726 // 727 // rbx: Method* 728 729 // r13: senderSP must preserve for slow path, set SP to it on fast path 730 731 address entry = __ pc(); 732 733 const int referent_offset = java_lang_ref_Reference::referent_offset; 734 guarantee(referent_offset > 0, "referent offset not initialized"); 735 736 if (UseG1GC) { 737 Label slow_path; 738 // rbx: method 739 740 // Check if local 0 != NULL 741 // If the receiver is null then it is OK to jump to the slow path. 742 __ movptr(rax, Address(rsp, wordSize)); 743 744 __ testptr(rax, rax); 745 __ jcc(Assembler::zero, slow_path); 746 747 // rax: local 0 748 // rbx: method (but can be used as scratch now) 749 // rdx: scratch 750 // rdi: scratch 751 752 // Preserve the sender sp in case the pre-barrier 753 // calls the runtime 754 NOT_LP64(__ push(rsi)); 755 756 // Generate the G1 pre-barrier code to log the value of 757 // the referent field in an SATB buffer. 758 759 // Load the value of the referent field. 760 const Address field_address(rax, referent_offset); 761 __ load_heap_oop(rax, field_address); 762 763 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13); 764 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 765 NOT_LP64(__ get_thread(thread)); 766 767 // Generate the G1 pre-barrier code to log the value of 768 // the referent field in an SATB buffer. 769 __ g1_write_barrier_pre(noreg /* obj */, 770 rax /* pre_val */, 771 thread /* thread */, 772 rbx /* tmp */, 773 true /* tosca_live */, 774 true /* expand_call */); 775 776 // _areturn 777 NOT_LP64(__ pop(rsi)); // get sender sp 778 __ pop(rdi); // get return address 779 __ mov(rsp, sender_sp); // set sp to sender sp 780 __ jmp(rdi); 781 __ ret(0); 782 783 // generate a vanilla interpreter entry as the slow path 784 __ bind(slow_path); 785 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); 786 return entry; 787 } 788 #endif // INCLUDE_ALL_GCS 789 790 // If G1 is not enabled then attempt to go through the accessor entry point 791 // Reference.get is an accessor 792 return NULL; 793 } 794 795 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { 796 // Quick & dirty stack overflow checking: bang the stack & handle trap. 797 // Note that we do the banging after the frame is setup, since the exception 798 // handling code expects to find a valid interpreter frame on the stack. 799 // Doing the banging earlier fails if the caller frame is not an interpreter 800 // frame. 801 // (Also, the exception throwing code expects to unlock any synchronized 802 // method receiever, so do the banging after locking the receiver.) 803 804 // Bang each page in the shadow zone. We can't assume it's been done for 805 // an interpreter frame with greater than a page of locals, so each page 806 // needs to be checked. Only true for non-native. 807 if (UseStackBanging) { 808 const int page_size = os::vm_page_size(); 809 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size; 810 const int start_page = native_call ? n_shadow_pages : 1; 811 for (int pages = start_page; pages <= n_shadow_pages; pages++) { 812 __ bang_stack_with_offset(pages*page_size); 813 } 814 } 815 } 816 817 // Interpreter stub for calling a native method. (asm interpreter) 818 // This sets up a somewhat different looking stack for calling the 819 // native method than the typical interpreter frame setup. 820 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { 821 // determine code generation flags 822 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 823 824 // rbx: Method* 825 // rbcp: sender sp 826 827 address entry_point = __ pc(); 828 829 const Address constMethod (rbx, Method::const_offset()); 830 const Address access_flags (rbx, Method::access_flags_offset()); 831 const Address size_of_parameters(rcx, ConstMethod:: 832 size_of_parameters_offset()); 833 834 835 // get parameter size (always needed) 836 __ movptr(rcx, constMethod); 837 __ load_unsigned_short(rcx, size_of_parameters); 838 839 // native calls don't need the stack size check since they have no 840 // expression stack and the arguments are already on the stack and 841 // we only add a handful of words to the stack 842 843 // rbx: Method* 844 // rcx: size of parameters 845 // rbcp: sender sp 846 __ pop(rax); // get return address 847 848 // for natives the size of locals is zero 849 850 // compute beginning of parameters 851 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 852 853 // add 2 zero-initialized slots for native calls 854 // initialize result_handler slot 855 __ push((int) NULL_WORD); 856 // slot for oop temp 857 // (static native method holder mirror/jni oop result) 858 __ push((int) NULL_WORD); 859 860 // initialize fixed part of activation frame 861 generate_fixed_frame(true); 862 863 // make sure method is native & not abstract 864 #ifdef ASSERT 865 __ movl(rax, access_flags); 866 { 867 Label L; 868 __ testl(rax, JVM_ACC_NATIVE); 869 __ jcc(Assembler::notZero, L); 870 __ stop("tried to execute non-native method as native"); 871 __ bind(L); 872 } 873 { 874 Label L; 875 __ testl(rax, JVM_ACC_ABSTRACT); 876 __ jcc(Assembler::zero, L); 877 __ stop("tried to execute abstract method in interpreter"); 878 __ bind(L); 879 } 880 #endif 881 882 // Since at this point in the method invocation the exception handler 883 // would try to exit the monitor of synchronized methods which hasn't 884 // been entered yet, we set the thread local variable 885 // _do_not_unlock_if_synchronized to true. The remove_activation will 886 // check this flag. 887 888 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread); 889 NOT_LP64(__ get_thread(thread1)); 890 const Address do_not_unlock_if_synchronized(thread1, 891 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 892 __ movbool(do_not_unlock_if_synchronized, true); 893 894 // increment invocation count & check for overflow 895 Label invocation_counter_overflow; 896 if (inc_counter) { 897 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 898 } 899 900 Label continue_after_compile; 901 __ bind(continue_after_compile); 902 903 bang_stack_shadow_pages(true); 904 905 // reset the _do_not_unlock_if_synchronized flag 906 NOT_LP64(__ get_thread(thread1)); 907 __ movbool(do_not_unlock_if_synchronized, false); 908 909 // check for synchronized methods 910 // Must happen AFTER invocation_counter check and stack overflow check, 911 // so method is not locked if overflows. 912 if (synchronized) { 913 lock_method(); 914 } else { 915 // no synchronization necessary 916 #ifdef ASSERT 917 { 918 Label L; 919 __ movl(rax, access_flags); 920 __ testl(rax, JVM_ACC_SYNCHRONIZED); 921 __ jcc(Assembler::zero, L); 922 __ stop("method needs synchronization"); 923 __ bind(L); 924 } 925 #endif 926 } 927 928 // start execution 929 #ifdef ASSERT 930 { 931 Label L; 932 const Address monitor_block_top(rbp, 933 frame::interpreter_frame_monitor_block_top_offset * wordSize); 934 __ movptr(rax, monitor_block_top); 935 __ cmpptr(rax, rsp); 936 __ jcc(Assembler::equal, L); 937 __ stop("broken stack frame setup in interpreter"); 938 __ bind(L); 939 } 940 #endif 941 942 // jvmti support 943 __ notify_method_entry(); 944 945 // work registers 946 const Register method = rbx; 947 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread); 948 const Register t = NOT_LP64(rcx) LP64_ONLY(r11); 949 950 // allocate space for parameters 951 __ get_method(method); 952 __ movptr(t, Address(method, Method::const_offset())); 953 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); 954 955 #ifndef _LP64 956 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes. 957 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror 958 __ subptr(rsp, t); 959 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics 960 #else 961 __ shll(t, Interpreter::logStackElementSize); 962 963 __ subptr(rsp, t); 964 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 965 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) 966 #endif // _LP64 967 968 // get signature handler 969 { 970 Label L; 971 __ movptr(t, Address(method, Method::signature_handler_offset())); 972 __ testptr(t, t); 973 __ jcc(Assembler::notZero, L); 974 __ call_VM(noreg, 975 CAST_FROM_FN_PTR(address, 976 InterpreterRuntime::prepare_native_call), 977 method); 978 __ get_method(method); 979 __ movptr(t, Address(method, Method::signature_handler_offset())); 980 __ bind(L); 981 } 982 983 // call signature handler 984 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals, 985 "adjust this code"); 986 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp, 987 "adjust this code"); 988 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1), 989 "adjust this code"); 990 991 // The generated handlers do not touch RBX (the method oop). 992 // However, large signatures cannot be cached and are generated 993 // each time here. The slow-path generator can do a GC on return, 994 // so we must reload it after the call. 995 __ call(t); 996 __ get_method(method); // slow path can do a GC, reload RBX 997 998 999 // result handler is in rax 1000 // set result handler 1001 __ movptr(Address(rbp, 1002 (frame::interpreter_frame_result_handler_offset) * wordSize), 1003 rax); 1004 1005 // pass mirror handle if static call 1006 { 1007 Label L; 1008 __ movl(t, Address(method, Method::access_flags_offset())); 1009 __ testl(t, JVM_ACC_STATIC); 1010 __ jcc(Assembler::zero, L); 1011 // get mirror 1012 __ load_mirror(t, method); 1013 // copy mirror into activation frame 1014 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), 1015 t); 1016 // pass handle to mirror 1017 #ifndef _LP64 1018 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 1019 __ movptr(Address(rsp, wordSize), t); 1020 #else 1021 __ lea(c_rarg1, 1022 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 1023 #endif // _LP64 1024 __ bind(L); 1025 } 1026 1027 // get native function entry point 1028 { 1029 Label L; 1030 __ movptr(rax, Address(method, Method::native_function_offset())); 1031 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 1032 __ cmpptr(rax, unsatisfied.addr()); 1033 __ jcc(Assembler::notEqual, L); 1034 __ call_VM(noreg, 1035 CAST_FROM_FN_PTR(address, 1036 InterpreterRuntime::prepare_native_call), 1037 method); 1038 __ get_method(method); 1039 __ movptr(rax, Address(method, Method::native_function_offset())); 1040 __ bind(L); 1041 } 1042 1043 // pass JNIEnv 1044 #ifndef _LP64 1045 __ get_thread(thread); 1046 __ lea(t, Address(thread, JavaThread::jni_environment_offset())); 1047 __ movptr(Address(rsp, 0), t); 1048 1049 // set_last_Java_frame_before_call 1050 // It is enough that the pc() 1051 // points into the right code segment. It does not have to be the correct return pc. 1052 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 1053 #else 1054 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset())); 1055 1056 // It is enough that the pc() points into the right code 1057 // segment. It does not have to be the correct return pc. 1058 __ set_last_Java_frame(rsp, rbp, (address) __ pc()); 1059 #endif // _LP64 1060 1061 // change thread state 1062 #ifdef ASSERT 1063 { 1064 Label L; 1065 __ movl(t, Address(thread, JavaThread::thread_state_offset())); 1066 __ cmpl(t, _thread_in_Java); 1067 __ jcc(Assembler::equal, L); 1068 __ stop("Wrong thread state in native stub"); 1069 __ bind(L); 1070 } 1071 #endif 1072 1073 // Change state to native 1074 1075 __ movl(Address(thread, JavaThread::thread_state_offset()), 1076 _thread_in_native); 1077 1078 // Call the native method. 1079 __ call(rax); 1080 // 32: result potentially in rdx:rax or ST0 1081 // 64: result potentially in rax or xmm0 1082 1083 // Verify or restore cpu control state after JNI call 1084 __ restore_cpu_control_state_after_jni(); 1085 1086 // NOTE: The order of these pushes is known to frame::interpreter_frame_result 1087 // in order to extract the result of a method call. If the order of these 1088 // pushes change or anything else is added to the stack then the code in 1089 // interpreter_frame_result must also change. 1090 1091 #ifndef _LP64 1092 // save potential result in ST(0) & rdx:rax 1093 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 - 1094 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers) 1095 // It is safe to do this push because state is _thread_in_native and return address will be found 1096 // via _last_native_pc and not via _last_jave_sp 1097 1098 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result. 1099 // If the order changes or anything else is added to the stack the code in 1100 // interpreter_frame_result will have to be changed. 1101 1102 { Label L; 1103 Label push_double; 1104 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); 1105 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); 1106 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1107 float_handler.addr()); 1108 __ jcc(Assembler::equal, push_double); 1109 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1110 double_handler.addr()); 1111 __ jcc(Assembler::notEqual, L); 1112 __ bind(push_double); 1113 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0). 1114 __ bind(L); 1115 } 1116 #else 1117 __ push(dtos); 1118 #endif // _LP64 1119 1120 __ push(ltos); 1121 1122 // change thread state 1123 NOT_LP64(__ get_thread(thread)); 1124 __ movl(Address(thread, JavaThread::thread_state_offset()), 1125 _thread_in_native_trans); 1126 1127 if (os::is_MP()) { 1128 if (UseMembar) { 1129 // Force this write out before the read below 1130 __ membar(Assembler::Membar_mask_bits( 1131 Assembler::LoadLoad | Assembler::LoadStore | 1132 Assembler::StoreLoad | Assembler::StoreStore)); 1133 } else { 1134 // Write serialization page so VM thread can do a pseudo remote membar. 1135 // We use the current thread pointer to calculate a thread specific 1136 // offset to write to within the page. This minimizes bus traffic 1137 // due to cache line collision. 1138 __ serialize_memory(thread, rcx); 1139 } 1140 } 1141 1142 #ifndef _LP64 1143 if (AlwaysRestoreFPU) { 1144 // Make sure the control word is correct. 1145 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1146 } 1147 #endif // _LP64 1148 1149 // check for safepoint operation in progress and/or pending suspend requests 1150 { 1151 Label Continue; 1152 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 1153 SafepointSynchronize::_not_synchronized); 1154 1155 Label L; 1156 __ jcc(Assembler::notEqual, L); 1157 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); 1158 __ jcc(Assembler::equal, Continue); 1159 __ bind(L); 1160 1161 // Don't use call_VM as it will see a possible pending exception 1162 // and forward it and never return here preventing us from 1163 // clearing _last_native_pc down below. Also can't use 1164 // call_VM_leaf either as it will check to see if r13 & r14 are 1165 // preserved and correspond to the bcp/locals pointers. So we do a 1166 // runtime call by hand. 1167 // 1168 #ifndef _LP64 1169 __ push(thread); 1170 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, 1171 JavaThread::check_special_condition_for_native_trans))); 1172 __ increment(rsp, wordSize); 1173 __ get_thread(thread); 1174 #else 1175 __ mov(c_rarg0, r15_thread); 1176 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1177 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1178 __ andptr(rsp, -16); // align stack as required by ABI 1179 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); 1180 __ mov(rsp, r12); // restore sp 1181 __ reinit_heapbase(); 1182 #endif // _LP64 1183 __ bind(Continue); 1184 } 1185 1186 // change thread state 1187 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); 1188 1189 // reset_last_Java_frame 1190 __ reset_last_Java_frame(thread, true); 1191 1192 if (CheckJNICalls) { 1193 // clear_pending_jni_exception_check 1194 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD); 1195 } 1196 1197 // reset handle block 1198 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); 1199 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); 1200 1201 // If result is an oop unbox and store it in frame where gc will see it 1202 // and result handler will pick it up 1203 1204 { 1205 Label no_oop, not_weak, store_result; 1206 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); 1207 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); 1208 __ jcc(Assembler::notEqual, no_oop); 1209 // retrieve result 1210 __ pop(ltos); 1211 // Unbox oop result, e.g. JNIHandles::resolve value. 1212 __ resolve_jobject(rax /* value */, 1213 thread /* thread */, 1214 t /* tmp */); 1215 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax); 1216 // keep stack depth as expected by pushing oop which will eventually be discarded 1217 __ push(ltos); 1218 __ bind(no_oop); 1219 } 1220 1221 1222 { 1223 Label no_reguard; 1224 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), 1225 JavaThread::stack_guard_yellow_reserved_disabled); 1226 __ jcc(Assembler::notEqual, no_reguard); 1227 1228 __ pusha(); // XXX only save smashed registers 1229 #ifndef _LP64 1230 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1231 __ popa(); 1232 #else 1233 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1234 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows 1235 __ andptr(rsp, -16); // align stack as required by ABI 1236 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1237 __ mov(rsp, r12); // restore sp 1238 __ popa(); // XXX only restore smashed registers 1239 __ reinit_heapbase(); 1240 #endif // _LP64 1241 1242 __ bind(no_reguard); 1243 } 1244 1245 1246 // The method register is junk from after the thread_in_native transition 1247 // until here. Also can't call_VM until the bcp has been 1248 // restored. Need bcp for throwing exception below so get it now. 1249 __ get_method(method); 1250 1251 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base() 1252 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod* 1253 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase 1254 1255 // handle exceptions (exception handling will handle unlocking!) 1256 { 1257 Label L; 1258 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); 1259 __ jcc(Assembler::zero, L); 1260 // Note: At some point we may want to unify this with the code 1261 // used in call_VM_base(); i.e., we should use the 1262 // StubRoutines::forward_exception code. For now this doesn't work 1263 // here because the rsp is not correctly set at this point. 1264 __ MacroAssembler::call_VM(noreg, 1265 CAST_FROM_FN_PTR(address, 1266 InterpreterRuntime::throw_pending_exception)); 1267 __ should_not_reach_here(); 1268 __ bind(L); 1269 } 1270 1271 // do unlocking if necessary 1272 { 1273 Label L; 1274 __ movl(t, Address(method, Method::access_flags_offset())); 1275 __ testl(t, JVM_ACC_SYNCHRONIZED); 1276 __ jcc(Assembler::zero, L); 1277 // the code below should be shared with interpreter macro 1278 // assembler implementation 1279 { 1280 Label unlock; 1281 // BasicObjectLock will be first in list, since this is a 1282 // synchronized method. However, need to check that the object 1283 // has not been unlocked by an explicit monitorexit bytecode. 1284 const Address monitor(rbp, 1285 (intptr_t)(frame::interpreter_frame_initial_sp_offset * 1286 wordSize - (int)sizeof(BasicObjectLock))); 1287 1288 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 1289 1290 // monitor expect in c_rarg1 for slow unlock path 1291 __ lea(regmon, monitor); // address of first monitor 1292 1293 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes())); 1294 __ testptr(t, t); 1295 __ jcc(Assembler::notZero, unlock); 1296 1297 // Entry already unlocked, need to throw exception 1298 __ MacroAssembler::call_VM(noreg, 1299 CAST_FROM_FN_PTR(address, 1300 InterpreterRuntime::throw_illegal_monitor_state_exception)); 1301 __ should_not_reach_here(); 1302 1303 __ bind(unlock); 1304 __ unlock_object(regmon); 1305 } 1306 __ bind(L); 1307 } 1308 1309 // jvmti support 1310 // Note: This must happen _after_ handling/throwing any exceptions since 1311 // the exception handler code notifies the runtime of method exits 1312 // too. If this happens before, method entry/exit notifications are 1313 // not properly paired (was bug - gri 11/22/99). 1314 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1315 1316 // restore potential result in edx:eax, call result handler to 1317 // restore potential result in ST0 & handle result 1318 1319 __ pop(ltos); 1320 LP64_ONLY( __ pop(dtos)); 1321 1322 __ movptr(t, Address(rbp, 1323 (frame::interpreter_frame_result_handler_offset) * wordSize)); 1324 __ call(t); 1325 1326 // remove activation 1327 __ movptr(t, Address(rbp, 1328 frame::interpreter_frame_sender_sp_offset * 1329 wordSize)); // get sender sp 1330 __ leave(); // remove frame anchor 1331 __ pop(rdi); // get return address 1332 __ mov(rsp, t); // set sp to sender sp 1333 __ jmp(rdi); 1334 1335 if (inc_counter) { 1336 // Handle overflow of counter and compile method 1337 __ bind(invocation_counter_overflow); 1338 generate_counter_overflow(continue_after_compile); 1339 } 1340 1341 return entry_point; 1342 } 1343 1344 // Abstract method entry 1345 // Attempt to execute abstract method. Throw exception 1346 address TemplateInterpreterGenerator::generate_abstract_entry(void) { 1347 1348 address entry_point = __ pc(); 1349 1350 // abstract method entry 1351 1352 // pop return address, reset last_sp to NULL 1353 __ empty_expression_stack(); 1354 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed) 1355 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed) 1356 1357 // throw exception 1358 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); 1359 // the call_VM checks for exception, so we should never return here. 1360 __ should_not_reach_here(); 1361 1362 return entry_point; 1363 } 1364 1365 // 1366 // Generic interpreted method entry to (asm) interpreter 1367 // 1368 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { 1369 // determine code generation flags 1370 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; 1371 1372 // ebx: Method* 1373 // rbcp: sender sp 1374 address entry_point = __ pc(); 1375 1376 const Address constMethod(rbx, Method::const_offset()); 1377 const Address access_flags(rbx, Method::access_flags_offset()); 1378 const Address size_of_parameters(rdx, 1379 ConstMethod::size_of_parameters_offset()); 1380 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset()); 1381 1382 1383 // get parameter size (always needed) 1384 __ movptr(rdx, constMethod); 1385 __ load_unsigned_short(rcx, size_of_parameters); 1386 1387 // rbx: Method* 1388 // rcx: size of parameters 1389 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i ) 1390 1391 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words 1392 __ subl(rdx, rcx); // rdx = no. of additional locals 1393 1394 // YYY 1395 // __ incrementl(rdx); 1396 // __ andl(rdx, -2); 1397 1398 // see if we've got enough room on the stack for locals plus overhead. 1399 generate_stack_overflow_check(); 1400 1401 // get return address 1402 __ pop(rax); 1403 1404 // compute beginning of parameters 1405 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 1406 1407 // rdx - # of additional locals 1408 // allocate space for locals 1409 // explicitly initialize locals 1410 { 1411 Label exit, loop; 1412 __ testl(rdx, rdx); 1413 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 1414 __ bind(loop); 1415 __ push((int) NULL_WORD); // initialize local variables 1416 __ decrementl(rdx); // until everything initialized 1417 __ jcc(Assembler::greater, loop); 1418 __ bind(exit); 1419 } 1420 1421 // initialize fixed part of activation frame 1422 generate_fixed_frame(false); 1423 1424 // make sure method is not native & not abstract 1425 #ifdef ASSERT 1426 __ movl(rax, access_flags); 1427 { 1428 Label L; 1429 __ testl(rax, JVM_ACC_NATIVE); 1430 __ jcc(Assembler::zero, L); 1431 __ stop("tried to execute native method as non-native"); 1432 __ bind(L); 1433 } 1434 { 1435 Label L; 1436 __ testl(rax, JVM_ACC_ABSTRACT); 1437 __ jcc(Assembler::zero, L); 1438 __ stop("tried to execute abstract method in interpreter"); 1439 __ bind(L); 1440 } 1441 #endif 1442 1443 // Since at this point in the method invocation the exception 1444 // handler would try to exit the monitor of synchronized methods 1445 // which hasn't been entered yet, we set the thread local variable 1446 // _do_not_unlock_if_synchronized to true. The remove_activation 1447 // will check this flag. 1448 1449 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread); 1450 NOT_LP64(__ get_thread(thread)); 1451 const Address do_not_unlock_if_synchronized(thread, 1452 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1453 __ movbool(do_not_unlock_if_synchronized, true); 1454 1455 __ profile_parameters_type(rax, rcx, rdx); 1456 // increment invocation count & check for overflow 1457 Label invocation_counter_overflow; 1458 Label profile_method; 1459 Label profile_method_continue; 1460 if (inc_counter) { 1461 generate_counter_incr(&invocation_counter_overflow, 1462 &profile_method, 1463 &profile_method_continue); 1464 if (ProfileInterpreter) { 1465 __ bind(profile_method_continue); 1466 } 1467 } 1468 1469 Label continue_after_compile; 1470 __ bind(continue_after_compile); 1471 1472 // check for synchronized interpreted methods 1473 bang_stack_shadow_pages(false); 1474 1475 // reset the _do_not_unlock_if_synchronized flag 1476 NOT_LP64(__ get_thread(thread)); 1477 __ movbool(do_not_unlock_if_synchronized, false); 1478 1479 // check for synchronized methods 1480 // Must happen AFTER invocation_counter check and stack overflow check, 1481 // so method is not locked if overflows. 1482 if (synchronized) { 1483 // Allocate monitor and lock method 1484 lock_method(); 1485 } else { 1486 // no synchronization necessary 1487 #ifdef ASSERT 1488 { 1489 Label L; 1490 __ movl(rax, access_flags); 1491 __ testl(rax, JVM_ACC_SYNCHRONIZED); 1492 __ jcc(Assembler::zero, L); 1493 __ stop("method needs synchronization"); 1494 __ bind(L); 1495 } 1496 #endif 1497 } 1498 1499 // start execution 1500 #ifdef ASSERT 1501 { 1502 Label L; 1503 const Address monitor_block_top (rbp, 1504 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1505 __ movptr(rax, monitor_block_top); 1506 __ cmpptr(rax, rsp); 1507 __ jcc(Assembler::equal, L); 1508 __ stop("broken stack frame setup in interpreter"); 1509 __ bind(L); 1510 } 1511 #endif 1512 1513 // jvmti support 1514 __ notify_method_entry(); 1515 1516 __ dispatch_next(vtos); 1517 1518 // invocation counter overflow 1519 if (inc_counter) { 1520 if (ProfileInterpreter) { 1521 // We have decided to profile this method in the interpreter 1522 __ bind(profile_method); 1523 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1524 __ set_method_data_pointer_for_bcp(); 1525 __ get_method(rbx); 1526 __ jmp(profile_method_continue); 1527 } 1528 // Handle overflow of counter and compile method 1529 __ bind(invocation_counter_overflow); 1530 generate_counter_overflow(continue_after_compile); 1531 } 1532 1533 return entry_point; 1534 } 1535 1536 //----------------------------------------------------------------------------- 1537 // Exceptions 1538 1539 void TemplateInterpreterGenerator::generate_throw_exception() { 1540 // Entry point in previous activation (i.e., if the caller was 1541 // interpreted) 1542 Interpreter::_rethrow_exception_entry = __ pc(); 1543 // Restore sp to interpreter_frame_last_sp even though we are going 1544 // to empty the expression stack for the exception processing. 1545 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1546 // rax: exception 1547 // rdx: return address/pc that threw exception 1548 __ restore_bcp(); // r13/rsi points to call/send 1549 __ restore_locals(); 1550 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase. 1551 // Entry point for exceptions thrown within interpreter code 1552 Interpreter::_throw_exception_entry = __ pc(); 1553 // expression stack is undefined here 1554 // rax: exception 1555 // r13/rsi: exception bcp 1556 __ verify_oop(rax); 1557 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); 1558 LP64_ONLY(__ mov(c_rarg1, rax)); 1559 1560 // expression stack must be empty before entering the VM in case of 1561 // an exception 1562 __ empty_expression_stack(); 1563 // find exception handler address and preserve exception oop 1564 __ call_VM(rdx, 1565 CAST_FROM_FN_PTR(address, 1566 InterpreterRuntime::exception_handler_for_exception), 1567 rarg); 1568 // rax: exception handler entry point 1569 // rdx: preserved exception oop 1570 // r13/rsi: bcp for exception handler 1571 __ push_ptr(rdx); // push exception which is now the only value on the stack 1572 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) 1573 1574 // If the exception is not handled in the current frame the frame is 1575 // removed and the exception is rethrown (i.e. exception 1576 // continuation is _rethrow_exception). 1577 // 1578 // Note: At this point the bci is still the bxi for the instruction 1579 // which caused the exception and the expression stack is 1580 // empty. Thus, for any VM calls at this point, GC will find a legal 1581 // oop map (with empty expression stack). 1582 1583 // In current activation 1584 // tos: exception 1585 // esi: exception bcp 1586 1587 // 1588 // JVMTI PopFrame support 1589 // 1590 1591 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1592 __ empty_expression_stack(); 1593 // Set the popframe_processing bit in pending_popframe_condition 1594 // indicating that we are currently handling popframe, so that 1595 // call_VMs that may happen later do not trigger new popframe 1596 // handling cycles. 1597 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 1598 NOT_LP64(__ get_thread(thread)); 1599 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset())); 1600 __ orl(rdx, JavaThread::popframe_processing_bit); 1601 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx); 1602 1603 { 1604 // Check to see whether we are returning to a deoptimized frame. 1605 // (The PopFrame call ensures that the caller of the popped frame is 1606 // either interpreted or compiled and deoptimizes it if compiled.) 1607 // In this case, we can't call dispatch_next() after the frame is 1608 // popped, but instead must save the incoming arguments and restore 1609 // them after deoptimization has occurred. 1610 // 1611 // Note that we don't compare the return PC against the 1612 // deoptimization blob's unpack entry because of the presence of 1613 // adapter frames in C2. 1614 Label caller_not_deoptimized; 1615 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); 1616 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize)); 1617 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1618 InterpreterRuntime::interpreter_contains), rarg); 1619 __ testl(rax, rax); 1620 __ jcc(Assembler::notZero, caller_not_deoptimized); 1621 1622 // Compute size of arguments for saving when returning to 1623 // deoptimized caller 1624 __ get_method(rax); 1625 __ movptr(rax, Address(rax, Method::const_offset())); 1626 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod:: 1627 size_of_parameters_offset()))); 1628 __ shll(rax, Interpreter::logStackElementSize); 1629 __ restore_locals(); 1630 __ subptr(rlocals, rax); 1631 __ addptr(rlocals, wordSize); 1632 // Save these arguments 1633 NOT_LP64(__ get_thread(thread)); 1634 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1635 Deoptimization:: 1636 popframe_preserve_args), 1637 thread, rax, rlocals); 1638 1639 __ remove_activation(vtos, rdx, 1640 /* throw_monitor_exception */ false, 1641 /* install_monitor_exception */ false, 1642 /* notify_jvmdi */ false); 1643 1644 // Inform deoptimization that it is responsible for restoring 1645 // these arguments 1646 NOT_LP64(__ get_thread(thread)); 1647 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1648 JavaThread::popframe_force_deopt_reexecution_bit); 1649 1650 // Continue in deoptimization handler 1651 __ jmp(rdx); 1652 1653 __ bind(caller_not_deoptimized); 1654 } 1655 1656 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */ 1657 /* throw_monitor_exception */ false, 1658 /* install_monitor_exception */ false, 1659 /* notify_jvmdi */ false); 1660 1661 // Finish with popframe handling 1662 // A previous I2C followed by a deoptimization might have moved the 1663 // outgoing arguments further up the stack. PopFrame expects the 1664 // mutations to those outgoing arguments to be preserved and other 1665 // constraints basically require this frame to look exactly as 1666 // though it had previously invoked an interpreted activation with 1667 // no space between the top of the expression stack (current 1668 // last_sp) and the top of stack. Rather than force deopt to 1669 // maintain this kind of invariant all the time we call a small 1670 // fixup routine to move the mutated arguments onto the top of our 1671 // expression stack if necessary. 1672 #ifndef _LP64 1673 __ mov(rax, rsp); 1674 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1675 __ get_thread(thread); 1676 // PC must point into interpreter here 1677 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 1678 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx); 1679 __ get_thread(thread); 1680 #else 1681 __ mov(c_rarg1, rsp); 1682 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1683 // PC must point into interpreter here 1684 __ set_last_Java_frame(noreg, rbp, __ pc()); 1685 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2); 1686 #endif 1687 __ reset_last_Java_frame(thread, true); 1688 1689 // Restore the last_sp and null it out 1690 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1691 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); 1692 1693 __ restore_bcp(); 1694 __ restore_locals(); 1695 // The method data pointer was incremented already during 1696 // call profiling. We have to restore the mdp for the current bcp. 1697 if (ProfileInterpreter) { 1698 __ set_method_data_pointer_for_bcp(); 1699 } 1700 1701 // Clear the popframe condition flag 1702 NOT_LP64(__ get_thread(thread)); 1703 __ movl(Address(thread, JavaThread::popframe_condition_offset()), 1704 JavaThread::popframe_inactive); 1705 1706 #if INCLUDE_JVMTI 1707 { 1708 Label L_done; 1709 const Register local0 = rlocals; 1710 1711 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic); 1712 __ jcc(Assembler::notEqual, L_done); 1713 1714 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. 1715 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. 1716 1717 __ get_method(rdx); 1718 __ movptr(rax, Address(local0, 0)); 1719 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp); 1720 1721 __ testptr(rax, rax); 1722 __ jcc(Assembler::zero, L_done); 1723 1724 __ movptr(Address(rbx, 0), rax); 1725 __ bind(L_done); 1726 } 1727 #endif // INCLUDE_JVMTI 1728 1729 __ dispatch_next(vtos); 1730 // end of PopFrame support 1731 1732 Interpreter::_remove_activation_entry = __ pc(); 1733 1734 // preserve exception over this code sequence 1735 __ pop_ptr(rax); 1736 NOT_LP64(__ get_thread(thread)); 1737 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax); 1738 // remove the activation (without doing throws on illegalMonitorExceptions) 1739 __ remove_activation(vtos, rdx, false, true, false); 1740 // restore exception 1741 NOT_LP64(__ get_thread(thread)); 1742 __ get_vm_result(rax, thread); 1743 1744 // In between activations - previous activation type unknown yet 1745 // compute continuation point - the continuation point expects the 1746 // following registers set up: 1747 // 1748 // rax: exception 1749 // rdx: return address/pc that threw exception 1750 // rsp: expression stack of caller 1751 // rbp: ebp of caller 1752 __ push(rax); // save exception 1753 __ push(rdx); // save return address 1754 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, 1755 SharedRuntime::exception_handler_for_return_address), 1756 thread, rdx); 1757 __ mov(rbx, rax); // save exception handler 1758 __ pop(rdx); // restore return address 1759 __ pop(rax); // restore exception 1760 // Note that an "issuing PC" is actually the next PC after the call 1761 __ jmp(rbx); // jump to exception 1762 // handler of caller 1763 } 1764 1765 1766 // 1767 // JVMTI ForceEarlyReturn support 1768 // 1769 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1770 address entry = __ pc(); 1771 1772 __ restore_bcp(); 1773 __ restore_locals(); 1774 __ empty_expression_stack(); 1775 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse 1776 1777 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); 1778 NOT_LP64(__ get_thread(thread)); 1779 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 1780 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset()); 1781 1782 // Clear the earlyret state 1783 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); 1784 1785 __ remove_activation(state, rsi, 1786 false, /* throw_monitor_exception */ 1787 false, /* install_monitor_exception */ 1788 true); /* notify_jvmdi */ 1789 __ jmp(rsi); 1790 1791 return entry; 1792 } // end of ForceEarlyReturn support 1793 1794 1795 //----------------------------------------------------------------------------- 1796 // Helper for vtos entry point generation 1797 1798 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, 1799 address& bep, 1800 address& cep, 1801 address& sep, 1802 address& aep, 1803 address& iep, 1804 address& lep, 1805 address& fep, 1806 address& dep, 1807 address& qep, 1808 address& vep) { 1809 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1810 Label L; 1811 aep = __ pc(); __ push_ptr(); __ jmp(L); 1812 qep = __ pc(); __ push_ptr(); __ jmp(L); 1813 #ifndef _LP64 1814 fep = __ pc(); __ push(ftos); __ jmp(L); 1815 dep = __ pc(); __ push(dtos); __ jmp(L); 1816 #else 1817 fep = __ pc(); __ push_f(xmm0); __ jmp(L); 1818 dep = __ pc(); __ push_d(xmm0); __ jmp(L); 1819 #endif // _LP64 1820 lep = __ pc(); __ push_l(); __ jmp(L); 1821 bep = cep = sep = 1822 iep = __ pc(); __ push_i(); 1823 vep = __ pc(); 1824 __ bind(L); 1825 generate_and_dispatch(t); 1826 } 1827 1828 //----------------------------------------------------------------------------- 1829 1830 // Non-product code 1831 #ifndef PRODUCT 1832 1833 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1834 address entry = __ pc(); 1835 1836 #ifndef _LP64 1837 // prepare expression stack 1838 __ pop(rcx); // pop return address so expression stack is 'pure' 1839 __ push(state); // save tosca 1840 1841 // pass tosca registers as arguments & call tracer 1842 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx); 1843 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state) 1844 __ pop(state); // restore tosca 1845 1846 // return 1847 __ jmp(rcx); 1848 #else 1849 __ push(state); 1850 __ push(c_rarg0); 1851 __ push(c_rarg1); 1852 __ push(c_rarg2); 1853 __ push(c_rarg3); 1854 __ mov(c_rarg2, rax); // Pass itos 1855 #ifdef _WIN64 1856 __ movflt(xmm3, xmm0); // Pass ftos 1857 #endif 1858 __ call_VM(noreg, 1859 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), 1860 c_rarg1, c_rarg2, c_rarg3); 1861 __ pop(c_rarg3); 1862 __ pop(c_rarg2); 1863 __ pop(c_rarg1); 1864 __ pop(c_rarg0); 1865 __ pop(state); 1866 __ ret(0); // return from result handler 1867 #endif // _LP64 1868 1869 return entry; 1870 } 1871 1872 void TemplateInterpreterGenerator::count_bytecode() { 1873 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); 1874 } 1875 1876 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 1877 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); 1878 } 1879 1880 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 1881 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index)); 1882 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); 1883 __ orl(rbx, 1884 ((int) t->bytecode()) << 1885 BytecodePairHistogram::log2_number_of_codes); 1886 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); 1887 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters)); 1888 __ incrementl(Address(rscratch1, rbx, Address::times_4)); 1889 } 1890 1891 1892 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 1893 // Call a little run-time stub to avoid blow-up for each bytecode. 1894 // The run-time runtime saves the right registers, depending on 1895 // the tosca in-state for the given template. 1896 1897 assert(Interpreter::trace_code(t->tos_in()) != NULL, 1898 "entry must have been generated"); 1899 #ifndef _LP64 1900 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1901 #else 1902 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) 1903 __ andptr(rsp, -16); // align stack as required by ABI 1904 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1905 __ mov(rsp, r12); // restore sp 1906 __ reinit_heapbase(); 1907 #endif // _LP64 1908 } 1909 1910 1911 void TemplateInterpreterGenerator::stop_interpreter_at() { 1912 Label L; 1913 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), 1914 StopInterpreterAt); 1915 __ jcc(Assembler::notEqual, L); 1916 __ int3(); 1917 __ bind(L); 1918 } 1919 #endif // !PRODUCT