1 /* 2 * Copyright (c) 1997, 2010, 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 "incls/_precompiled.incl" 26 #include "incls/_templateInterpreter_x86_32.cpp.incl" 27 28 #define __ _masm-> 29 30 31 #ifndef CC_INTERP 32 const int method_offset = frame::interpreter_frame_method_offset * wordSize; 33 const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize; 34 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; 35 36 //------------------------------------------------------------------------------------------------------------------------ 37 38 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { 39 address entry = __ pc(); 40 41 // Note: There should be a minimal interpreter frame set up when stack 42 // overflow occurs since we check explicitly for it now. 43 // 44 #ifdef ASSERT 45 { Label L; 46 __ lea(rax, Address(rbp, 47 frame::interpreter_frame_monitor_block_top_offset * wordSize)); 48 __ cmpptr(rax, rsp); // rax, = maximal rsp for current rbp, 49 // (stack grows negative) 50 __ jcc(Assembler::aboveEqual, L); // check if frame is complete 51 __ stop ("interpreter frame not set up"); 52 __ bind(L); 53 } 54 #endif // ASSERT 55 // Restore bcp under the assumption that the current frame is still 56 // interpreted 57 __ restore_bcp(); 58 59 // expression stack must be empty before entering the VM if an exception 60 // happened 61 __ empty_expression_stack(); 62 __ empty_FPU_stack(); 63 // throw exception 64 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); 65 return entry; 66 } 67 68 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) { 69 address entry = __ pc(); 70 // expression stack must be empty before entering the VM if an exception happened 71 __ empty_expression_stack(); 72 __ empty_FPU_stack(); 73 // setup parameters 74 // ??? convention: expect aberrant index in register rbx, 75 __ lea(rax, ExternalAddress((address)name)); 76 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx); 77 return entry; 78 } 79 80 address TemplateInterpreterGenerator::generate_ClassCastException_handler() { 81 address entry = __ pc(); 82 // object is at TOS 83 __ pop(rax); 84 // expression stack must be empty before entering the VM if an exception 85 // happened 86 __ empty_expression_stack(); 87 __ empty_FPU_stack(); 88 __ call_VM(noreg, 89 CAST_FROM_FN_PTR(address, 90 InterpreterRuntime::throw_ClassCastException), 91 rax); 92 return entry; 93 } 94 95 // Arguments are: required type at TOS+4, failing object (or NULL) at TOS. 96 address TemplateInterpreterGenerator::generate_WrongMethodType_handler() { 97 address entry = __ pc(); 98 99 __ pop(rbx); // actual failing object is at TOS 100 __ pop(rax); // required type is at TOS+4 101 102 __ verify_oop(rbx); 103 __ verify_oop(rax); 104 105 // Various method handle types use interpreter registers as temps. 106 __ restore_bcp(); 107 __ restore_locals(); 108 109 // Expression stack must be empty before entering the VM for an exception. 110 __ empty_expression_stack(); 111 __ empty_FPU_stack(); 112 __ call_VM(noreg, 113 CAST_FROM_FN_PTR(address, 114 InterpreterRuntime::throw_WrongMethodTypeException), 115 // pass required type, failing object (or NULL) 116 rax, rbx); 117 return entry; 118 } 119 120 121 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { 122 assert(!pass_oop || message == NULL, "either oop or message but not both"); 123 address entry = __ pc(); 124 if (pass_oop) { 125 // object is at TOS 126 __ pop(rbx); 127 } 128 // expression stack must be empty before entering the VM if an exception happened 129 __ empty_expression_stack(); 130 __ empty_FPU_stack(); 131 // setup parameters 132 __ lea(rax, ExternalAddress((address)name)); 133 if (pass_oop) { 134 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx); 135 } else { 136 if (message != NULL) { 137 __ lea(rbx, ExternalAddress((address)message)); 138 } else { 139 __ movptr(rbx, NULL_WORD); 140 } 141 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx); 142 } 143 // throw exception 144 __ jump(ExternalAddress(Interpreter::throw_exception_entry())); 145 return entry; 146 } 147 148 149 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { 150 address entry = __ pc(); 151 // NULL last_sp until next java call 152 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 153 __ dispatch_next(state); 154 return entry; 155 } 156 157 158 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) { 159 TosState incoming_state = state; 160 161 Label interpreter_entry; 162 address compiled_entry = __ pc(); 163 164 #ifdef COMPILER2 165 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases 166 if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) { 167 for (int i = 1; i < 8; i++) { 168 __ ffree(i); 169 } 170 } else if (UseSSE < 2) { 171 __ empty_FPU_stack(); 172 } 173 #endif 174 if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) { 175 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled"); 176 } else { 177 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled"); 178 } 179 180 __ jmp(interpreter_entry, relocInfo::none); 181 // emit a sentinel we can test for when converting an interpreter 182 // entry point to a compiled entry point. 183 __ a_long(Interpreter::return_sentinel); 184 __ a_long((int)compiled_entry); 185 address entry = __ pc(); 186 __ bind(interpreter_entry); 187 188 // In SSE mode, interpreter returns FP results in xmm0 but they need 189 // to end up back on the FPU so it can operate on them. 190 if (incoming_state == ftos && UseSSE >= 1) { 191 __ subptr(rsp, wordSize); 192 __ movflt(Address(rsp, 0), xmm0); 193 __ fld_s(Address(rsp, 0)); 194 __ addptr(rsp, wordSize); 195 } else if (incoming_state == dtos && UseSSE >= 2) { 196 __ subptr(rsp, 2*wordSize); 197 __ movdbl(Address(rsp, 0), xmm0); 198 __ fld_d(Address(rsp, 0)); 199 __ addptr(rsp, 2*wordSize); 200 } 201 202 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_return_entry_for in interpreter"); 203 204 // Restore stack bottom in case i2c adjusted stack 205 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 206 // and NULL it as marker that rsp is now tos until next java call 207 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 208 209 __ restore_bcp(); 210 __ restore_locals(); 211 212 Label L_got_cache, L_giant_index; 213 if (EnableInvokeDynamic) { 214 __ cmpb(Address(rsi, 0), Bytecodes::_invokedynamic); 215 __ jcc(Assembler::equal, L_giant_index); 216 } 217 __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u2)); 218 __ bind(L_got_cache); 219 __ movl(rbx, Address(rbx, rcx, 220 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + 221 ConstantPoolCacheEntry::flags_offset())); 222 __ andptr(rbx, 0xFF); 223 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale())); 224 __ dispatch_next(state, step); 225 226 // out of the main line of code... 227 if (EnableInvokeDynamic) { 228 __ bind(L_giant_index); 229 __ get_cache_and_index_at_bcp(rbx, rcx, 1, sizeof(u4)); 230 __ jmp(L_got_cache); 231 } 232 233 return entry; 234 } 235 236 237 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { 238 address entry = __ pc(); 239 240 // In SSE mode, FP results are in xmm0 241 if (state == ftos && UseSSE > 0) { 242 __ subptr(rsp, wordSize); 243 __ movflt(Address(rsp, 0), xmm0); 244 __ fld_s(Address(rsp, 0)); 245 __ addptr(rsp, wordSize); 246 } else if (state == dtos && UseSSE >= 2) { 247 __ subptr(rsp, 2*wordSize); 248 __ movdbl(Address(rsp, 0), xmm0); 249 __ fld_d(Address(rsp, 0)); 250 __ addptr(rsp, 2*wordSize); 251 } 252 253 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_deopt_entry_for in interpreter"); 254 255 // The stack is not extended by deopt but we must NULL last_sp as this 256 // entry is like a "return". 257 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 258 __ restore_bcp(); 259 __ restore_locals(); 260 // handle exceptions 261 { Label L; 262 const Register thread = rcx; 263 __ get_thread(thread); 264 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); 265 __ jcc(Assembler::zero, L); 266 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); 267 __ should_not_reach_here(); 268 __ bind(L); 269 } 270 __ dispatch_next(state, step); 271 return entry; 272 } 273 274 275 int AbstractInterpreter::BasicType_as_index(BasicType type) { 276 int i = 0; 277 switch (type) { 278 case T_BOOLEAN: i = 0; break; 279 case T_CHAR : i = 1; break; 280 case T_BYTE : i = 2; break; 281 case T_SHORT : i = 3; break; 282 case T_INT : // fall through 283 case T_LONG : // fall through 284 case T_VOID : i = 4; break; 285 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE 286 case T_DOUBLE : i = 6; break; 287 case T_OBJECT : // fall through 288 case T_ARRAY : i = 7; break; 289 default : ShouldNotReachHere(); 290 } 291 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); 292 return i; 293 } 294 295 296 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) { 297 address entry = __ pc(); 298 switch (type) { 299 case T_BOOLEAN: __ c2bool(rax); break; 300 case T_CHAR : __ andptr(rax, 0xFFFF); break; 301 case T_BYTE : __ sign_extend_byte (rax); break; 302 case T_SHORT : __ sign_extend_short(rax); break; 303 case T_INT : /* nothing to do */ break; 304 case T_DOUBLE : 305 case T_FLOAT : 306 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); 307 __ pop(t); // remove return address first 308 // Must return a result for interpreter or compiler. In SSE 309 // mode, results are returned in xmm0 and the FPU stack must 310 // be empty. 311 if (type == T_FLOAT && UseSSE >= 1) { 312 // Load ST0 313 __ fld_d(Address(rsp, 0)); 314 // Store as float and empty fpu stack 315 __ fstp_s(Address(rsp, 0)); 316 // and reload 317 __ movflt(xmm0, Address(rsp, 0)); 318 } else if (type == T_DOUBLE && UseSSE >= 2 ) { 319 __ movdbl(xmm0, Address(rsp, 0)); 320 } else { 321 // restore ST0 322 __ fld_d(Address(rsp, 0)); 323 } 324 // and pop the temp 325 __ addptr(rsp, 2 * wordSize); 326 __ push(t); // restore return address 327 } 328 break; 329 case T_OBJECT : 330 // retrieve result from frame 331 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); 332 // and verify it 333 __ verify_oop(rax); 334 break; 335 default : ShouldNotReachHere(); 336 } 337 __ ret(0); // return from result handler 338 return entry; 339 } 340 341 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) { 342 address entry = __ pc(); 343 __ push(state); 344 __ call_VM(noreg, runtime_entry); 345 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); 346 return entry; 347 } 348 349 350 // Helpers for commoning out cases in the various type of method entries. 351 // 352 353 // increment invocation count & check for overflow 354 // 355 // Note: checking for negative value instead of overflow 356 // so we have a 'sticky' overflow test 357 // 358 // rbx,: method 359 // rcx: invocation counter 360 // 361 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { 362 const Address invocation_counter(rbx, in_bytes(methodOopDesc::invocation_counter_offset()) + 363 in_bytes(InvocationCounter::counter_offset())); 364 // Note: In tiered we increment either counters in methodOop or in MDO depending if we're profiling or not. 365 if (TieredCompilation) { 366 int increment = InvocationCounter::count_increment; 367 int mask = ((1 << Tier0InvokeNotifyFreqLog) - 1) << InvocationCounter::count_shift; 368 Label no_mdo, done; 369 if (ProfileInterpreter) { 370 // Are we profiling? 371 __ movptr(rax, Address(rbx, methodOopDesc::method_data_offset())); 372 __ testptr(rax, rax); 373 __ jccb(Assembler::zero, no_mdo); 374 // Increment counter in the MDO 375 const Address mdo_invocation_counter(rax, in_bytes(methodDataOopDesc::invocation_counter_offset()) + 376 in_bytes(InvocationCounter::counter_offset())); 377 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); 378 __ jmpb(done); 379 } 380 __ bind(no_mdo); 381 // Increment counter in methodOop (we don't need to load it, it's in rcx). 382 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, true, Assembler::zero, overflow); 383 __ bind(done); 384 } else { 385 const Address backedge_counter (rbx, methodOopDesc::backedge_counter_offset() + 386 InvocationCounter::counter_offset()); 387 388 if (ProfileInterpreter) { // %%% Merge this into methodDataOop 389 __ incrementl(Address(rbx,methodOopDesc::interpreter_invocation_counter_offset())); 390 } 391 // Update standard invocation counters 392 __ movl(rax, backedge_counter); // load backedge counter 393 394 __ incrementl(rcx, InvocationCounter::count_increment); 395 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits 396 397 __ movl(invocation_counter, rcx); // save invocation count 398 __ addl(rcx, rax); // add both counters 399 400 // profile_method is non-null only for interpreted method so 401 // profile_method != NULL == !native_call 402 // BytecodeInterpreter only calls for native so code is elided. 403 404 if (ProfileInterpreter && profile_method != NULL) { 405 // Test to see if we should create a method data oop 406 __ cmp32(rcx, 407 ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit)); 408 __ jcc(Assembler::less, *profile_method_continue); 409 410 // if no method data exists, go to profile_method 411 __ test_method_data_pointer(rax, *profile_method); 412 } 413 414 __ cmp32(rcx, 415 ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit)); 416 __ jcc(Assembler::aboveEqual, *overflow); 417 } 418 } 419 420 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { 421 422 // Asm interpreter on entry 423 // rdi - locals 424 // rsi - bcp 425 // rbx, - method 426 // rdx - cpool 427 // rbp, - interpreter frame 428 429 // C++ interpreter on entry 430 // rsi - new interpreter state pointer 431 // rbp - interpreter frame pointer 432 // rbx - method 433 434 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] 435 // rbx, - method 436 // rcx - rcvr (assuming there is one) 437 // top of stack return address of interpreter caller 438 // rsp - sender_sp 439 440 // C++ interpreter only 441 // rsi - previous interpreter state pointer 442 443 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset()); 444 445 // InterpreterRuntime::frequency_counter_overflow takes one argument 446 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp). 447 // The call returns the address of the verified entry point for the method or NULL 448 // if the compilation did not complete (either went background or bailed out). 449 __ movptr(rax, (intptr_t)false); 450 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax); 451 452 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop 453 454 // Preserve invariant that rsi/rdi contain bcp/locals of sender frame 455 // and jump to the interpreted entry. 456 __ jmp(*do_continue, relocInfo::none); 457 458 } 459 460 void InterpreterGenerator::generate_stack_overflow_check(void) { 461 // see if we've got enough room on the stack for locals plus overhead. 462 // the expression stack grows down incrementally, so the normal guard 463 // page mechanism will work for that. 464 // 465 // Registers live on entry: 466 // 467 // Asm interpreter 468 // rdx: number of additional locals this frame needs (what we must check) 469 // rbx,: methodOop 470 471 // destroyed on exit 472 // rax, 473 474 // NOTE: since the additional locals are also always pushed (wasn't obvious in 475 // generate_method_entry) so the guard should work for them too. 476 // 477 478 // monitor entry size: see picture of stack set (generate_method_entry) and frame_x86.hpp 479 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 480 481 // total overhead size: entry_size + (saved rbp, thru expr stack bottom). 482 // be sure to change this if you add/subtract anything to/from the overhead area 483 const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size; 484 485 const int page_size = os::vm_page_size(); 486 487 Label after_frame_check; 488 489 // see if the frame is greater than one page in size. If so, 490 // then we need to verify there is enough stack space remaining 491 // for the additional locals. 492 __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize); 493 __ jcc(Assembler::belowEqual, after_frame_check); 494 495 // compute rsp as if this were going to be the last frame on 496 // the stack before the red zone 497 498 Label after_frame_check_pop; 499 500 __ push(rsi); 501 502 const Register thread = rsi; 503 504 __ get_thread(thread); 505 506 const Address stack_base(thread, Thread::stack_base_offset()); 507 const Address stack_size(thread, Thread::stack_size_offset()); 508 509 // locals + overhead, in bytes 510 __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size)); 511 512 #ifdef ASSERT 513 Label stack_base_okay, stack_size_okay; 514 // verify that thread stack base is non-zero 515 __ cmpptr(stack_base, (int32_t)NULL_WORD); 516 __ jcc(Assembler::notEqual, stack_base_okay); 517 __ stop("stack base is zero"); 518 __ bind(stack_base_okay); 519 // verify that thread stack size is non-zero 520 __ cmpptr(stack_size, 0); 521 __ jcc(Assembler::notEqual, stack_size_okay); 522 __ stop("stack size is zero"); 523 __ bind(stack_size_okay); 524 #endif 525 526 // Add stack base to locals and subtract stack size 527 __ addptr(rax, stack_base); 528 __ subptr(rax, stack_size); 529 530 // Use the maximum number of pages we might bang. 531 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages : 532 (StackRedPages+StackYellowPages); 533 __ addptr(rax, max_pages * page_size); 534 535 // check against the current stack bottom 536 __ cmpptr(rsp, rax); 537 __ jcc(Assembler::above, after_frame_check_pop); 538 539 __ pop(rsi); // get saved bcp / (c++ prev state ). 540 541 __ pop(rax); // get return address 542 __ jump(ExternalAddress(Interpreter::throw_StackOverflowError_entry())); 543 544 // all done with frame size check 545 __ bind(after_frame_check_pop); 546 __ pop(rsi); 547 548 __ bind(after_frame_check); 549 } 550 551 // Allocate monitor and lock method (asm interpreter) 552 // rbx, - methodOop 553 // 554 void InterpreterGenerator::lock_method(void) { 555 // synchronize method 556 const Address access_flags (rbx, methodOopDesc::access_flags_offset()); 557 const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); 558 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; 559 560 #ifdef ASSERT 561 { Label L; 562 __ movl(rax, access_flags); 563 __ testl(rax, JVM_ACC_SYNCHRONIZED); 564 __ jcc(Assembler::notZero, L); 565 __ stop("method doesn't need synchronization"); 566 __ bind(L); 567 } 568 #endif // ASSERT 569 // get synchronization object 570 { Label done; 571 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes(); 572 __ movl(rax, access_flags); 573 __ testl(rax, JVM_ACC_STATIC); 574 __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case) 575 __ jcc(Assembler::zero, done); 576 __ movptr(rax, Address(rbx, methodOopDesc::constants_offset())); 577 __ movptr(rax, Address(rax, constantPoolOopDesc::pool_holder_offset_in_bytes())); 578 __ movptr(rax, Address(rax, mirror_offset)); 579 __ bind(done); 580 } 581 // add space for monitor & lock 582 __ subptr(rsp, entry_size); // add space for a monitor entry 583 __ movptr(monitor_block_top, rsp); // set new monitor block top 584 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object 585 __ mov(rdx, rsp); // object address 586 __ lock_object(rdx); 587 } 588 589 // 590 // Generate a fixed interpreter frame. This is identical setup for interpreted methods 591 // and for native methods hence the shared code. 592 593 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { 594 // initialize fixed part of activation frame 595 __ push(rax); // save return address 596 __ enter(); // save old & set new rbp, 597 598 599 __ push(rsi); // set sender sp 600 __ push((int32_t)NULL_WORD); // leave last_sp as null 601 __ movptr(rsi, Address(rbx,methodOopDesc::const_offset())); // get constMethodOop 602 __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase 603 __ push(rbx); // save methodOop 604 if (ProfileInterpreter) { 605 Label method_data_continue; 606 __ movptr(rdx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); 607 __ testptr(rdx, rdx); 608 __ jcc(Assembler::zero, method_data_continue); 609 __ addptr(rdx, in_bytes(methodDataOopDesc::data_offset())); 610 __ bind(method_data_continue); 611 __ push(rdx); // set the mdp (method data pointer) 612 } else { 613 __ push(0); 614 } 615 616 __ movptr(rdx, Address(rbx, methodOopDesc::constants_offset())); 617 __ movptr(rdx, Address(rdx, constantPoolOopDesc::cache_offset_in_bytes())); 618 __ push(rdx); // set constant pool cache 619 __ push(rdi); // set locals pointer 620 if (native_call) { 621 __ push(0); // no bcp 622 } else { 623 __ push(rsi); // set bcp 624 } 625 __ push(0); // reserve word for pointer to expression stack bottom 626 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom 627 } 628 629 // End of helpers 630 631 // 632 // Various method entries 633 //------------------------------------------------------------------------------------------------------------------------ 634 // 635 // 636 637 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry 638 639 address InterpreterGenerator::generate_accessor_entry(void) { 640 641 // rbx,: methodOop 642 // rcx: receiver (preserve for slow entry into asm interpreter) 643 644 // rsi: senderSP must preserved for slow path, set SP to it on fast path 645 646 address entry_point = __ pc(); 647 Label xreturn_path; 648 649 // do fastpath for resolved accessor methods 650 if (UseFastAccessorMethods) { 651 Label slow_path; 652 // If we need a safepoint check, generate full interpreter entry. 653 ExternalAddress state(SafepointSynchronize::address_of_state()); 654 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 655 SafepointSynchronize::_not_synchronized); 656 657 __ jcc(Assembler::notEqual, slow_path); 658 // ASM/C++ Interpreter 659 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1 660 // Note: We can only use this code if the getfield has been resolved 661 // and if we don't have a null-pointer exception => check for 662 // these conditions first and use slow path if necessary. 663 // rbx,: method 664 // rcx: receiver 665 __ movptr(rax, Address(rsp, wordSize)); 666 667 // check if local 0 != NULL and read field 668 __ testptr(rax, rax); 669 __ jcc(Assembler::zero, slow_path); 670 671 __ movptr(rdi, Address(rbx, methodOopDesc::constants_offset())); 672 // read first instruction word and extract bytecode @ 1 and index @ 2 673 __ movptr(rdx, Address(rbx, methodOopDesc::const_offset())); 674 __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset())); 675 // Shift codes right to get the index on the right. 676 // The bytecode fetched looks like <index><0xb4><0x2a> 677 __ shrl(rdx, 2*BitsPerByte); 678 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size()))); 679 __ movptr(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes())); 680 681 // rax,: local 0 682 // rbx,: method 683 // rcx: receiver - do not destroy since it is needed for slow path! 684 // rcx: scratch 685 // rdx: constant pool cache index 686 // rdi: constant pool cache 687 // rsi: sender sp 688 689 // check if getfield has been resolved and read constant pool cache entry 690 // check the validity of the cache entry by testing whether _indices field 691 // contains Bytecode::_getfield in b1 byte. 692 assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below"); 693 __ movl(rcx, 694 Address(rdi, 695 rdx, 696 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset())); 697 __ shrl(rcx, 2*BitsPerByte); 698 __ andl(rcx, 0xFF); 699 __ cmpl(rcx, Bytecodes::_getfield); 700 __ jcc(Assembler::notEqual, slow_path); 701 702 // Note: constant pool entry is not valid before bytecode is resolved 703 __ movptr(rcx, 704 Address(rdi, 705 rdx, 706 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f2_offset())); 707 __ movl(rdx, 708 Address(rdi, 709 rdx, 710 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::flags_offset())); 711 712 Label notByte, notShort, notChar; 713 const Address field_address (rax, rcx, Address::times_1); 714 715 // Need to differentiate between igetfield, agetfield, bgetfield etc. 716 // because they are different sizes. 717 // Use the type from the constant pool cache 718 __ shrl(rdx, ConstantPoolCacheEntry::tosBits); 719 // Make sure we don't need to mask rdx for tosBits after the above shift 720 ConstantPoolCacheEntry::verify_tosBits(); 721 __ cmpl(rdx, btos); 722 __ jcc(Assembler::notEqual, notByte); 723 __ load_signed_byte(rax, field_address); 724 __ jmp(xreturn_path); 725 726 __ bind(notByte); 727 __ cmpl(rdx, stos); 728 __ jcc(Assembler::notEqual, notShort); 729 __ load_signed_short(rax, field_address); 730 __ jmp(xreturn_path); 731 732 __ bind(notShort); 733 __ cmpl(rdx, ctos); 734 __ jcc(Assembler::notEqual, notChar); 735 __ load_unsigned_short(rax, field_address); 736 __ jmp(xreturn_path); 737 738 __ bind(notChar); 739 #ifdef ASSERT 740 Label okay; 741 __ cmpl(rdx, atos); 742 __ jcc(Assembler::equal, okay); 743 __ cmpl(rdx, itos); 744 __ jcc(Assembler::equal, okay); 745 __ stop("what type is this?"); 746 __ bind(okay); 747 #endif // ASSERT 748 // All the rest are a 32 bit wordsize 749 // This is ok for now. Since fast accessors should be going away 750 __ movptr(rax, field_address); 751 752 __ bind(xreturn_path); 753 754 // _ireturn/_areturn 755 __ pop(rdi); // get return address 756 __ mov(rsp, rsi); // set sp to sender sp 757 __ jmp(rdi); 758 759 // generate a vanilla interpreter entry as the slow path 760 __ bind(slow_path); 761 762 (void) generate_normal_entry(false); 763 return entry_point; 764 } 765 return NULL; 766 767 } 768 769 // 770 // Interpreter stub for calling a native method. (asm interpreter) 771 // This sets up a somewhat different looking stack for calling the native method 772 // than the typical interpreter frame setup. 773 // 774 775 address InterpreterGenerator::generate_native_entry(bool synchronized) { 776 // determine code generation flags 777 bool inc_counter = UseCompiler || CountCompiledCalls; 778 779 // rbx,: methodOop 780 // rsi: sender sp 781 // rsi: previous interpreter state (C++ interpreter) must preserve 782 address entry_point = __ pc(); 783 784 785 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset()); 786 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset()); 787 const Address access_flags (rbx, methodOopDesc::access_flags_offset()); 788 789 // get parameter size (always needed) 790 __ load_unsigned_short(rcx, size_of_parameters); 791 792 // native calls don't need the stack size check since they have no expression stack 793 // and the arguments are already on the stack and we only add a handful of words 794 // to the stack 795 796 // rbx,: methodOop 797 // rcx: size of parameters 798 // rsi: sender sp 799 800 __ pop(rax); // get return address 801 // for natives the size of locals is zero 802 803 // compute beginning of parameters (rdi) 804 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 805 806 807 // add 2 zero-initialized slots for native calls 808 // NULL result handler 809 __ push((int32_t)NULL_WORD); 810 // NULL oop temp (mirror or jni oop result) 811 __ push((int32_t)NULL_WORD); 812 813 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count 814 // initialize fixed part of activation frame 815 816 generate_fixed_frame(true); 817 818 // make sure method is native & not abstract 819 #ifdef ASSERT 820 __ movl(rax, access_flags); 821 { 822 Label L; 823 __ testl(rax, JVM_ACC_NATIVE); 824 __ jcc(Assembler::notZero, L); 825 __ stop("tried to execute non-native method as native"); 826 __ bind(L); 827 } 828 { Label L; 829 __ testl(rax, JVM_ACC_ABSTRACT); 830 __ jcc(Assembler::zero, L); 831 __ stop("tried to execute abstract method in interpreter"); 832 __ bind(L); 833 } 834 #endif 835 836 // Since at this point in the method invocation the exception handler 837 // would try to exit the monitor of synchronized methods which hasn't 838 // been entered yet, we set the thread local variable 839 // _do_not_unlock_if_synchronized to true. The remove_activation will 840 // check this flag. 841 842 __ get_thread(rax); 843 const Address do_not_unlock_if_synchronized(rax, 844 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 845 __ movbool(do_not_unlock_if_synchronized, true); 846 847 // increment invocation count & check for overflow 848 Label invocation_counter_overflow; 849 if (inc_counter) { 850 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); 851 } 852 853 Label continue_after_compile; 854 __ bind(continue_after_compile); 855 856 bang_stack_shadow_pages(true); 857 858 // reset the _do_not_unlock_if_synchronized flag 859 __ get_thread(rax); 860 __ movbool(do_not_unlock_if_synchronized, false); 861 862 // check for synchronized methods 863 // Must happen AFTER invocation_counter check and stack overflow check, 864 // so method is not locked if overflows. 865 // 866 if (synchronized) { 867 lock_method(); 868 } else { 869 // no synchronization necessary 870 #ifdef ASSERT 871 { Label L; 872 __ movl(rax, access_flags); 873 __ testl(rax, JVM_ACC_SYNCHRONIZED); 874 __ jcc(Assembler::zero, L); 875 __ stop("method needs synchronization"); 876 __ bind(L); 877 } 878 #endif 879 } 880 881 // start execution 882 #ifdef ASSERT 883 { Label L; 884 const Address monitor_block_top (rbp, 885 frame::interpreter_frame_monitor_block_top_offset * wordSize); 886 __ movptr(rax, monitor_block_top); 887 __ cmpptr(rax, rsp); 888 __ jcc(Assembler::equal, L); 889 __ stop("broken stack frame setup in interpreter"); 890 __ bind(L); 891 } 892 #endif 893 894 // jvmti/dtrace support 895 __ notify_method_entry(); 896 897 // work registers 898 const Register method = rbx; 899 const Register thread = rdi; 900 const Register t = rcx; 901 902 // allocate space for parameters 903 __ get_method(method); 904 __ verify_oop(method); 905 __ load_unsigned_short(t, Address(method, methodOopDesc::size_of_parameters_offset())); 906 __ shlptr(t, Interpreter::logStackElementSize); 907 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror 908 __ subptr(rsp, t); 909 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics 910 911 // get signature handler 912 { Label L; 913 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset())); 914 __ testptr(t, t); 915 __ jcc(Assembler::notZero, L); 916 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method); 917 __ get_method(method); 918 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset())); 919 __ bind(L); 920 } 921 922 // call signature handler 923 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code"); 924 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code"); 925 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code"); 926 // The generated handlers do not touch RBX (the method oop). 927 // However, large signatures cannot be cached and are generated 928 // each time here. The slow-path generator will blow RBX 929 // sometime, so we must reload it after the call. 930 __ call(t); 931 __ get_method(method); // slow path call blows RBX on DevStudio 5.0 932 933 // result handler is in rax, 934 // set result handler 935 __ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax); 936 937 // pass mirror handle if static call 938 { Label L; 939 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes(); 940 __ movl(t, Address(method, methodOopDesc::access_flags_offset())); 941 __ testl(t, JVM_ACC_STATIC); 942 __ jcc(Assembler::zero, L); 943 // get mirror 944 __ movptr(t, Address(method, methodOopDesc:: constants_offset())); 945 __ movptr(t, Address(t, constantPoolOopDesc::pool_holder_offset_in_bytes())); 946 __ movptr(t, Address(t, mirror_offset)); 947 // copy mirror into activation frame 948 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t); 949 // pass handle to mirror 950 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); 951 __ movptr(Address(rsp, wordSize), t); 952 __ bind(L); 953 } 954 955 // get native function entry point 956 { Label L; 957 __ movptr(rax, Address(method, methodOopDesc::native_function_offset())); 958 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); 959 __ cmpptr(rax, unsatisfied.addr()); 960 __ jcc(Assembler::notEqual, L); 961 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method); 962 __ get_method(method); 963 __ verify_oop(method); 964 __ movptr(rax, Address(method, methodOopDesc::native_function_offset())); 965 __ bind(L); 966 } 967 968 // pass JNIEnv 969 __ get_thread(thread); 970 __ lea(t, Address(thread, JavaThread::jni_environment_offset())); 971 __ movptr(Address(rsp, 0), t); 972 973 // set_last_Java_frame_before_call 974 // It is enough that the pc() 975 // points into the right code segment. It does not have to be the correct return pc. 976 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 977 978 // change thread state 979 #ifdef ASSERT 980 { Label L; 981 __ movl(t, Address(thread, JavaThread::thread_state_offset())); 982 __ cmpl(t, _thread_in_Java); 983 __ jcc(Assembler::equal, L); 984 __ stop("Wrong thread state in native stub"); 985 __ bind(L); 986 } 987 #endif 988 989 // Change state to native 990 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native); 991 __ call(rax); 992 993 // result potentially in rdx:rax or ST0 994 995 // Either restore the MXCSR register after returning from the JNI Call 996 // or verify that it wasn't changed. 997 if (VM_Version::supports_sse()) { 998 if (RestoreMXCSROnJNICalls) { 999 __ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std())); 1000 } 1001 else if (CheckJNICalls ) { 1002 __ call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry())); 1003 } 1004 } 1005 1006 // Either restore the x87 floating pointer control word after returning 1007 // from the JNI call or verify that it wasn't changed. 1008 if (CheckJNICalls) { 1009 __ call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry())); 1010 } 1011 1012 // save potential result in ST(0) & rdx:rax 1013 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 - 1014 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers) 1015 // It is safe to do this push because state is _thread_in_native and return address will be found 1016 // via _last_native_pc and not via _last_jave_sp 1017 1018 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result. 1019 // If the order changes or anything else is added to the stack the code in 1020 // interpreter_frame_result will have to be changed. 1021 1022 { Label L; 1023 Label push_double; 1024 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); 1025 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); 1026 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1027 float_handler.addr()); 1028 __ jcc(Assembler::equal, push_double); 1029 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), 1030 double_handler.addr()); 1031 __ jcc(Assembler::notEqual, L); 1032 __ bind(push_double); 1033 __ push(dtos); 1034 __ bind(L); 1035 } 1036 __ push(ltos); 1037 1038 // change thread state 1039 __ get_thread(thread); 1040 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans); 1041 if(os::is_MP()) { 1042 if (UseMembar) { 1043 // Force this write out before the read below 1044 __ membar(Assembler::Membar_mask_bits( 1045 Assembler::LoadLoad | Assembler::LoadStore | 1046 Assembler::StoreLoad | Assembler::StoreStore)); 1047 } else { 1048 // Write serialization page so VM thread can do a pseudo remote membar. 1049 // We use the current thread pointer to calculate a thread specific 1050 // offset to write to within the page. This minimizes bus traffic 1051 // due to cache line collision. 1052 __ serialize_memory(thread, rcx); 1053 } 1054 } 1055 1056 if (AlwaysRestoreFPU) { 1057 // Make sure the control word is correct. 1058 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); 1059 } 1060 1061 // check for safepoint operation in progress and/or pending suspend requests 1062 { Label Continue; 1063 1064 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), 1065 SafepointSynchronize::_not_synchronized); 1066 1067 Label L; 1068 __ jcc(Assembler::notEqual, L); 1069 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); 1070 __ jcc(Assembler::equal, Continue); 1071 __ bind(L); 1072 1073 // Don't use call_VM as it will see a possible pending exception and forward it 1074 // and never return here preventing us from clearing _last_native_pc down below. 1075 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are 1076 // preserved and correspond to the bcp/locals pointers. So we do a runtime call 1077 // by hand. 1078 // 1079 __ push(thread); 1080 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, 1081 JavaThread::check_special_condition_for_native_trans))); 1082 __ increment(rsp, wordSize); 1083 __ get_thread(thread); 1084 1085 __ bind(Continue); 1086 } 1087 1088 // change thread state 1089 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); 1090 1091 __ reset_last_Java_frame(thread, true, true); 1092 1093 // reset handle block 1094 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); 1095 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD); 1096 1097 // If result was an oop then unbox and save it in the frame 1098 { Label L; 1099 Label no_oop, store_result; 1100 ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT)); 1101 __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), 1102 handler.addr()); 1103 __ jcc(Assembler::notEqual, no_oop); 1104 __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD); 1105 __ pop(ltos); 1106 __ testptr(rax, rax); 1107 __ jcc(Assembler::zero, store_result); 1108 // unbox 1109 __ movptr(rax, Address(rax, 0)); 1110 __ bind(store_result); 1111 __ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax); 1112 // keep stack depth as expected by pushing oop which will eventually be discarded 1113 __ push(ltos); 1114 __ bind(no_oop); 1115 } 1116 1117 { 1118 Label no_reguard; 1119 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); 1120 __ jcc(Assembler::notEqual, no_reguard); 1121 1122 __ pusha(); 1123 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); 1124 __ popa(); 1125 1126 __ bind(no_reguard); 1127 } 1128 1129 // restore rsi to have legal interpreter frame, 1130 // i.e., bci == 0 <=> rsi == code_base() 1131 // Can't call_VM until bcp is within reasonable. 1132 __ get_method(method); // method is junk from thread_in_native to now. 1133 __ verify_oop(method); 1134 __ movptr(rsi, Address(method,methodOopDesc::const_offset())); // get constMethodOop 1135 __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase 1136 1137 // handle exceptions (exception handling will handle unlocking!) 1138 { Label L; 1139 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); 1140 __ jcc(Assembler::zero, L); 1141 // Note: At some point we may want to unify this with the code used in call_VM_base(); 1142 // i.e., we should use the StubRoutines::forward_exception code. For now this 1143 // doesn't work here because the rsp is not correctly set at this point. 1144 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception)); 1145 __ should_not_reach_here(); 1146 __ bind(L); 1147 } 1148 1149 // do unlocking if necessary 1150 { Label L; 1151 __ movl(t, Address(method, methodOopDesc::access_flags_offset())); 1152 __ testl(t, JVM_ACC_SYNCHRONIZED); 1153 __ jcc(Assembler::zero, L); 1154 // the code below should be shared with interpreter macro assembler implementation 1155 { Label unlock; 1156 // BasicObjectLock will be first in list, since this is a synchronized method. However, need 1157 // to check that the object has not been unlocked by an explicit monitorexit bytecode. 1158 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock)); 1159 1160 __ lea(rdx, monitor); // address of first monitor 1161 1162 __ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes())); 1163 __ testptr(t, t); 1164 __ jcc(Assembler::notZero, unlock); 1165 1166 // Entry already unlocked, need to throw exception 1167 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); 1168 __ should_not_reach_here(); 1169 1170 __ bind(unlock); 1171 __ unlock_object(rdx); 1172 } 1173 __ bind(L); 1174 } 1175 1176 // jvmti/dtrace support 1177 // Note: This must happen _after_ handling/throwing any exceptions since 1178 // the exception handler code notifies the runtime of method exits 1179 // too. If this happens before, method entry/exit notifications are 1180 // not properly paired (was bug - gri 11/22/99). 1181 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); 1182 1183 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result 1184 __ pop(ltos); 1185 __ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); 1186 __ call(t); 1187 1188 // remove activation 1189 __ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp 1190 __ leave(); // remove frame anchor 1191 __ pop(rdi); // get return address 1192 __ mov(rsp, t); // set sp to sender sp 1193 __ jmp(rdi); 1194 1195 if (inc_counter) { 1196 // Handle overflow of counter and compile method 1197 __ bind(invocation_counter_overflow); 1198 generate_counter_overflow(&continue_after_compile); 1199 } 1200 1201 return entry_point; 1202 } 1203 1204 // 1205 // Generic interpreted method entry to (asm) interpreter 1206 // 1207 address InterpreterGenerator::generate_normal_entry(bool synchronized) { 1208 // determine code generation flags 1209 bool inc_counter = UseCompiler || CountCompiledCalls; 1210 1211 // rbx,: methodOop 1212 // rsi: sender sp 1213 address entry_point = __ pc(); 1214 1215 1216 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset()); 1217 const Address size_of_locals (rbx, methodOopDesc::size_of_locals_offset()); 1218 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset()); 1219 const Address access_flags (rbx, methodOopDesc::access_flags_offset()); 1220 1221 // get parameter size (always needed) 1222 __ load_unsigned_short(rcx, size_of_parameters); 1223 1224 // rbx,: methodOop 1225 // rcx: size of parameters 1226 1227 // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i ) 1228 1229 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words 1230 __ subl(rdx, rcx); // rdx = no. of additional locals 1231 1232 // see if we've got enough room on the stack for locals plus overhead. 1233 generate_stack_overflow_check(); 1234 1235 // get return address 1236 __ pop(rax); 1237 1238 // compute beginning of parameters (rdi) 1239 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); 1240 1241 // rdx - # of additional locals 1242 // allocate space for locals 1243 // explicitly initialize locals 1244 { 1245 Label exit, loop; 1246 __ testl(rdx, rdx); 1247 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 1248 __ bind(loop); 1249 __ push((int32_t)NULL_WORD); // initialize local variables 1250 __ decrement(rdx); // until everything initialized 1251 __ jcc(Assembler::greater, loop); 1252 __ bind(exit); 1253 } 1254 1255 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count 1256 // initialize fixed part of activation frame 1257 generate_fixed_frame(false); 1258 1259 // make sure method is not native & not abstract 1260 #ifdef ASSERT 1261 __ movl(rax, access_flags); 1262 { 1263 Label L; 1264 __ testl(rax, JVM_ACC_NATIVE); 1265 __ jcc(Assembler::zero, L); 1266 __ stop("tried to execute native method as non-native"); 1267 __ bind(L); 1268 } 1269 { Label L; 1270 __ testl(rax, JVM_ACC_ABSTRACT); 1271 __ jcc(Assembler::zero, L); 1272 __ stop("tried to execute abstract method in interpreter"); 1273 __ bind(L); 1274 } 1275 #endif 1276 1277 // Since at this point in the method invocation the exception handler 1278 // would try to exit the monitor of synchronized methods which hasn't 1279 // been entered yet, we set the thread local variable 1280 // _do_not_unlock_if_synchronized to true. The remove_activation will 1281 // check this flag. 1282 1283 __ get_thread(rax); 1284 const Address do_not_unlock_if_synchronized(rax, 1285 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); 1286 __ movbool(do_not_unlock_if_synchronized, true); 1287 1288 // increment invocation count & check for overflow 1289 Label invocation_counter_overflow; 1290 Label profile_method; 1291 Label profile_method_continue; 1292 if (inc_counter) { 1293 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue); 1294 if (ProfileInterpreter) { 1295 __ bind(profile_method_continue); 1296 } 1297 } 1298 Label continue_after_compile; 1299 __ bind(continue_after_compile); 1300 1301 bang_stack_shadow_pages(false); 1302 1303 // reset the _do_not_unlock_if_synchronized flag 1304 __ get_thread(rax); 1305 __ movbool(do_not_unlock_if_synchronized, false); 1306 1307 // check for synchronized methods 1308 // Must happen AFTER invocation_counter check and stack overflow check, 1309 // so method is not locked if overflows. 1310 // 1311 if (synchronized) { 1312 // Allocate monitor and lock method 1313 lock_method(); 1314 } else { 1315 // no synchronization necessary 1316 #ifdef ASSERT 1317 { Label L; 1318 __ movl(rax, access_flags); 1319 __ testl(rax, JVM_ACC_SYNCHRONIZED); 1320 __ jcc(Assembler::zero, L); 1321 __ stop("method needs synchronization"); 1322 __ bind(L); 1323 } 1324 #endif 1325 } 1326 1327 // start execution 1328 #ifdef ASSERT 1329 { Label L; 1330 const Address monitor_block_top (rbp, 1331 frame::interpreter_frame_monitor_block_top_offset * wordSize); 1332 __ movptr(rax, monitor_block_top); 1333 __ cmpptr(rax, rsp); 1334 __ jcc(Assembler::equal, L); 1335 __ stop("broken stack frame setup in interpreter"); 1336 __ bind(L); 1337 } 1338 #endif 1339 1340 // jvmti support 1341 __ notify_method_entry(); 1342 1343 __ dispatch_next(vtos); 1344 1345 // invocation counter overflow 1346 if (inc_counter) { 1347 if (ProfileInterpreter) { 1348 // We have decided to profile this method in the interpreter 1349 __ bind(profile_method); 1350 1351 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), rsi, true); 1352 1353 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop 1354 __ movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); 1355 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); 1356 __ test_method_data_pointer(rax, profile_method_continue); 1357 __ addptr(rax, in_bytes(methodDataOopDesc::data_offset())); 1358 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); 1359 __ jmp(profile_method_continue); 1360 } 1361 // Handle overflow of counter and compile method 1362 __ bind(invocation_counter_overflow); 1363 generate_counter_overflow(&continue_after_compile); 1364 } 1365 1366 return entry_point; 1367 } 1368 1369 //------------------------------------------------------------------------------------------------------------------------ 1370 // Entry points 1371 // 1372 // Here we generate the various kind of entries into the interpreter. 1373 // The two main entry type are generic bytecode methods and native call method. 1374 // These both come in synchronized and non-synchronized versions but the 1375 // frame layout they create is very similar. The other method entry 1376 // types are really just special purpose entries that are really entry 1377 // and interpretation all in one. These are for trivial methods like 1378 // accessor, empty, or special math methods. 1379 // 1380 // When control flow reaches any of the entry types for the interpreter 1381 // the following holds -> 1382 // 1383 // Arguments: 1384 // 1385 // rbx,: methodOop 1386 // rcx: receiver 1387 // 1388 // 1389 // Stack layout immediately at entry 1390 // 1391 // [ return address ] <--- rsp 1392 // [ parameter n ] 1393 // ... 1394 // [ parameter 1 ] 1395 // [ expression stack ] (caller's java expression stack) 1396 1397 // Assuming that we don't go to one of the trivial specialized 1398 // entries the stack will look like below when we are ready to execute 1399 // the first bytecode (or call the native routine). The register usage 1400 // will be as the template based interpreter expects (see interpreter_x86.hpp). 1401 // 1402 // local variables follow incoming parameters immediately; i.e. 1403 // the return address is moved to the end of the locals). 1404 // 1405 // [ monitor entry ] <--- rsp 1406 // ... 1407 // [ monitor entry ] 1408 // [ expr. stack bottom ] 1409 // [ saved rsi ] 1410 // [ current rdi ] 1411 // [ methodOop ] 1412 // [ saved rbp, ] <--- rbp, 1413 // [ return address ] 1414 // [ local variable m ] 1415 // ... 1416 // [ local variable 1 ] 1417 // [ parameter n ] 1418 // ... 1419 // [ parameter 1 ] <--- rdi 1420 1421 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) { 1422 // determine code generation flags 1423 bool synchronized = false; 1424 address entry_point = NULL; 1425 1426 switch (kind) { 1427 case Interpreter::zerolocals : break; 1428 case Interpreter::zerolocals_synchronized: synchronized = true; break; 1429 case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break; 1430 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break; 1431 case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break; 1432 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break; 1433 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break; 1434 case Interpreter::method_handle : entry_point = ((InterpreterGenerator*)this)->generate_method_handle_entry(); break; 1435 1436 case Interpreter::java_lang_math_sin : // fall thru 1437 case Interpreter::java_lang_math_cos : // fall thru 1438 case Interpreter::java_lang_math_tan : // fall thru 1439 case Interpreter::java_lang_math_abs : // fall thru 1440 case Interpreter::java_lang_math_log : // fall thru 1441 case Interpreter::java_lang_math_log10 : // fall thru 1442 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break; 1443 default : ShouldNotReachHere(); break; 1444 } 1445 1446 if (entry_point) return entry_point; 1447 1448 return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized); 1449 1450 } 1451 1452 // These should never be compiled since the interpreter will prefer 1453 // the compiled version to the intrinsic version. 1454 bool AbstractInterpreter::can_be_compiled(methodHandle m) { 1455 switch (method_kind(m)) { 1456 case Interpreter::java_lang_math_sin : // fall thru 1457 case Interpreter::java_lang_math_cos : // fall thru 1458 case Interpreter::java_lang_math_tan : // fall thru 1459 case Interpreter::java_lang_math_abs : // fall thru 1460 case Interpreter::java_lang_math_log : // fall thru 1461 case Interpreter::java_lang_math_log10 : // fall thru 1462 case Interpreter::java_lang_math_sqrt : 1463 return false; 1464 default: 1465 return true; 1466 } 1467 } 1468 1469 // How much stack a method activation needs in words. 1470 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) { 1471 1472 const int stub_code = 4; // see generate_call_stub 1473 // Save space for one monitor to get into the interpreted method in case 1474 // the method is synchronized 1475 int monitor_size = method->is_synchronized() ? 1476 1*frame::interpreter_frame_monitor_size() : 0; 1477 1478 // total overhead size: entry_size + (saved rbp, thru expr stack bottom). 1479 // be sure to change this if you add/subtract anything to/from the overhead area 1480 const int overhead_size = -frame::interpreter_frame_initial_sp_offset; 1481 1482 const int extra_stack = methodOopDesc::extra_stack_entries(); 1483 const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) * 1484 Interpreter::stackElementWords; 1485 return overhead_size + method_stack + stub_code; 1486 } 1487 1488 // asm based interpreter deoptimization helpers 1489 1490 int AbstractInterpreter::layout_activation(methodOop method, 1491 int tempcount, 1492 int popframe_extra_args, 1493 int moncount, 1494 int callee_param_count, 1495 int callee_locals, 1496 frame* caller, 1497 frame* interpreter_frame, 1498 bool is_top_frame) { 1499 // Note: This calculation must exactly parallel the frame setup 1500 // in AbstractInterpreterGenerator::generate_method_entry. 1501 // If interpreter_frame!=NULL, set up the method, locals, and monitors. 1502 // The frame interpreter_frame, if not NULL, is guaranteed to be the right size, 1503 // as determined by a previous call to this method. 1504 // It is also guaranteed to be walkable even though it is in a skeletal state 1505 // NOTE: return size is in words not bytes 1506 1507 // fixed size of an interpreter frame: 1508 int max_locals = method->max_locals() * Interpreter::stackElementWords; 1509 int extra_locals = (method->max_locals() - method->size_of_parameters()) * 1510 Interpreter::stackElementWords; 1511 1512 int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset; 1513 1514 // Our locals were accounted for by the caller (or last_frame_adjust on the transistion) 1515 // Since the callee parameters already account for the callee's params we only need to account for 1516 // the extra locals. 1517 1518 1519 int size = overhead + 1520 ((callee_locals - callee_param_count)*Interpreter::stackElementWords) + 1521 (moncount*frame::interpreter_frame_monitor_size()) + 1522 tempcount*Interpreter::stackElementWords + popframe_extra_args; 1523 1524 if (interpreter_frame != NULL) { 1525 #ifdef ASSERT 1526 if (!EnableMethodHandles) 1527 // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences? 1528 // Probably, since deoptimization doesn't work yet. 1529 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable"); 1530 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)"); 1531 #endif 1532 1533 interpreter_frame->interpreter_frame_set_method(method); 1534 // NOTE the difference in using sender_sp and interpreter_frame_sender_sp 1535 // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp) 1536 // and sender_sp is fp+8 1537 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1; 1538 1539 interpreter_frame->interpreter_frame_set_locals(locals); 1540 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin(); 1541 BasicObjectLock* monbot = montop - moncount; 1542 interpreter_frame->interpreter_frame_set_monitor_end(monbot); 1543 1544 // Set last_sp 1545 intptr_t* rsp = (intptr_t*) monbot - 1546 tempcount*Interpreter::stackElementWords - 1547 popframe_extra_args; 1548 interpreter_frame->interpreter_frame_set_last_sp(rsp); 1549 1550 // All frames but the initial (oldest) interpreter frame we fill in have a 1551 // value for sender_sp that allows walking the stack but isn't 1552 // truly correct. Correct the value here. 1553 1554 if (extra_locals != 0 && 1555 interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) { 1556 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals); 1557 } 1558 *interpreter_frame->interpreter_frame_cache_addr() = 1559 method->constants()->cache(); 1560 } 1561 return size; 1562 } 1563 1564 1565 //------------------------------------------------------------------------------------------------------------------------ 1566 // Exceptions 1567 1568 void TemplateInterpreterGenerator::generate_throw_exception() { 1569 // Entry point in previous activation (i.e., if the caller was interpreted) 1570 Interpreter::_rethrow_exception_entry = __ pc(); 1571 const Register thread = rcx; 1572 1573 // Restore sp to interpreter_frame_last_sp even though we are going 1574 // to empty the expression stack for the exception processing. 1575 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 1576 // rax,: exception 1577 // rdx: return address/pc that threw exception 1578 __ restore_bcp(); // rsi points to call/send 1579 __ restore_locals(); 1580 1581 // Entry point for exceptions thrown within interpreter code 1582 Interpreter::_throw_exception_entry = __ pc(); 1583 // expression stack is undefined here 1584 // rax,: exception 1585 // rsi: exception bcp 1586 __ verify_oop(rax); 1587 1588 // expression stack must be empty before entering the VM in case of an exception 1589 __ empty_expression_stack(); 1590 __ empty_FPU_stack(); 1591 // find exception handler address and preserve exception oop 1592 __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax); 1593 // rax,: exception handler entry point 1594 // rdx: preserved exception oop 1595 // rsi: bcp for exception handler 1596 __ push_ptr(rdx); // push exception which is now the only value on the stack 1597 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) 1598 1599 // If the exception is not handled in the current frame the frame is removed and 1600 // the exception is rethrown (i.e. exception continuation is _rethrow_exception). 1601 // 1602 // Note: At this point the bci is still the bxi for the instruction which caused 1603 // the exception and the expression stack is empty. Thus, for any VM calls 1604 // at this point, GC will find a legal oop map (with empty expression stack). 1605 1606 // In current activation 1607 // tos: exception 1608 // rsi: exception bcp 1609 1610 // 1611 // JVMTI PopFrame support 1612 // 1613 1614 Interpreter::_remove_activation_preserving_args_entry = __ pc(); 1615 __ empty_expression_stack(); 1616 __ empty_FPU_stack(); 1617 // Set the popframe_processing bit in pending_popframe_condition indicating that we are 1618 // currently handling popframe, so that call_VMs that may happen later do not trigger new 1619 // popframe handling cycles. 1620 __ get_thread(thread); 1621 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset())); 1622 __ orl(rdx, JavaThread::popframe_processing_bit); 1623 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx); 1624 1625 { 1626 // Check to see whether we are returning to a deoptimized frame. 1627 // (The PopFrame call ensures that the caller of the popped frame is 1628 // either interpreted or compiled and deoptimizes it if compiled.) 1629 // In this case, we can't call dispatch_next() after the frame is 1630 // popped, but instead must save the incoming arguments and restore 1631 // them after deoptimization has occurred. 1632 // 1633 // Note that we don't compare the return PC against the 1634 // deoptimization blob's unpack entry because of the presence of 1635 // adapter frames in C2. 1636 Label caller_not_deoptimized; 1637 __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize)); 1638 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx); 1639 __ testl(rax, rax); 1640 __ jcc(Assembler::notZero, caller_not_deoptimized); 1641 1642 // Compute size of arguments for saving when returning to deoptimized caller 1643 __ get_method(rax); 1644 __ verify_oop(rax); 1645 __ load_unsigned_short(rax, Address(rax, in_bytes(methodOopDesc::size_of_parameters_offset()))); 1646 __ shlptr(rax, Interpreter::logStackElementSize); 1647 __ restore_locals(); 1648 __ subptr(rdi, rax); 1649 __ addptr(rdi, wordSize); 1650 // Save these arguments 1651 __ get_thread(thread); 1652 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), thread, rax, rdi); 1653 1654 __ remove_activation(vtos, rdx, 1655 /* throw_monitor_exception */ false, 1656 /* install_monitor_exception */ false, 1657 /* notify_jvmdi */ false); 1658 1659 // Inform deoptimization that it is responsible for restoring these arguments 1660 __ get_thread(thread); 1661 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit); 1662 1663 // Continue in deoptimization handler 1664 __ jmp(rdx); 1665 1666 __ bind(caller_not_deoptimized); 1667 } 1668 1669 __ remove_activation(vtos, rdx, 1670 /* throw_monitor_exception */ false, 1671 /* install_monitor_exception */ false, 1672 /* notify_jvmdi */ false); 1673 1674 // Finish with popframe handling 1675 // A previous I2C followed by a deoptimization might have moved the 1676 // outgoing arguments further up the stack. PopFrame expects the 1677 // mutations to those outgoing arguments to be preserved and other 1678 // constraints basically require this frame to look exactly as 1679 // though it had previously invoked an interpreted activation with 1680 // no space between the top of the expression stack (current 1681 // last_sp) and the top of stack. Rather than force deopt to 1682 // maintain this kind of invariant all the time we call a small 1683 // fixup routine to move the mutated arguments onto the top of our 1684 // expression stack if necessary. 1685 __ mov(rax, rsp); 1686 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1687 __ get_thread(thread); 1688 // PC must point into interpreter here 1689 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); 1690 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx); 1691 __ get_thread(thread); 1692 __ reset_last_Java_frame(thread, true, true); 1693 // Restore the last_sp and null it out 1694 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); 1695 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD); 1696 1697 __ restore_bcp(); 1698 __ restore_locals(); 1699 // The method data pointer was incremented already during 1700 // call profiling. We have to restore the mdp for the current bcp. 1701 if (ProfileInterpreter) { 1702 __ set_method_data_pointer_for_bcp(); 1703 } 1704 1705 // Clear the popframe condition flag 1706 __ get_thread(thread); 1707 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive); 1708 1709 __ dispatch_next(vtos); 1710 // end of PopFrame support 1711 1712 Interpreter::_remove_activation_entry = __ pc(); 1713 1714 // preserve exception over this code sequence 1715 __ pop_ptr(rax); 1716 __ get_thread(thread); 1717 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax); 1718 // remove the activation (without doing throws on illegalMonitorExceptions) 1719 __ remove_activation(vtos, rdx, false, true, false); 1720 // restore exception 1721 __ get_thread(thread); 1722 __ movptr(rax, Address(thread, JavaThread::vm_result_offset())); 1723 __ movptr(Address(thread, JavaThread::vm_result_offset()), NULL_WORD); 1724 __ verify_oop(rax); 1725 1726 // Inbetween activations - previous activation type unknown yet 1727 // compute continuation point - the continuation point expects 1728 // the following registers set up: 1729 // 1730 // rax: exception 1731 // rdx: return address/pc that threw exception 1732 // rsp: expression stack of caller 1733 // rbp: rbp, of caller 1734 __ push(rax); // save exception 1735 __ push(rdx); // save return address 1736 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, rdx); 1737 __ mov(rbx, rax); // save exception handler 1738 __ pop(rdx); // restore return address 1739 __ pop(rax); // restore exception 1740 // Note that an "issuing PC" is actually the next PC after the call 1741 __ jmp(rbx); // jump to exception handler of caller 1742 } 1743 1744 1745 // 1746 // JVMTI ForceEarlyReturn support 1747 // 1748 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { 1749 address entry = __ pc(); 1750 const Register thread = rcx; 1751 1752 __ restore_bcp(); 1753 __ restore_locals(); 1754 __ empty_expression_stack(); 1755 __ empty_FPU_stack(); 1756 __ load_earlyret_value(state); 1757 1758 __ get_thread(thread); 1759 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); 1760 const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset()); 1761 1762 // Clear the earlyret state 1763 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); 1764 1765 __ remove_activation(state, rsi, 1766 false, /* throw_monitor_exception */ 1767 false, /* install_monitor_exception */ 1768 true); /* notify_jvmdi */ 1769 __ jmp(rsi); 1770 return entry; 1771 } // end of ForceEarlyReturn support 1772 1773 1774 //------------------------------------------------------------------------------------------------------------------------ 1775 // Helper for vtos entry point generation 1776 1777 void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) { 1778 assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); 1779 Label L; 1780 fep = __ pc(); __ push(ftos); __ jmp(L); 1781 dep = __ pc(); __ push(dtos); __ jmp(L); 1782 lep = __ pc(); __ push(ltos); __ jmp(L); 1783 aep = __ pc(); __ push(atos); __ jmp(L); 1784 bep = cep = sep = // fall through 1785 iep = __ pc(); __ push(itos); // fall through 1786 vep = __ pc(); __ bind(L); // fall through 1787 generate_and_dispatch(t); 1788 } 1789 1790 //------------------------------------------------------------------------------------------------------------------------ 1791 // Generation of individual instructions 1792 1793 // helpers for generate_and_dispatch 1794 1795 1796 1797 InterpreterGenerator::InterpreterGenerator(StubQueue* code) 1798 : TemplateInterpreterGenerator(code) { 1799 generate_all(); // down here so it can be "virtual" 1800 } 1801 1802 //------------------------------------------------------------------------------------------------------------------------ 1803 1804 // Non-product code 1805 #ifndef PRODUCT 1806 address TemplateInterpreterGenerator::generate_trace_code(TosState state) { 1807 address entry = __ pc(); 1808 1809 // prepare expression stack 1810 __ pop(rcx); // pop return address so expression stack is 'pure' 1811 __ push(state); // save tosca 1812 1813 // pass tosca registers as arguments & call tracer 1814 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx); 1815 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state) 1816 __ pop(state); // restore tosca 1817 1818 // return 1819 __ jmp(rcx); 1820 1821 return entry; 1822 } 1823 1824 1825 void TemplateInterpreterGenerator::count_bytecode() { 1826 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); 1827 } 1828 1829 1830 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { 1831 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); 1832 } 1833 1834 1835 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { 1836 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); 1837 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); 1838 __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes); 1839 ExternalAddress table((address) BytecodePairHistogram::_counters); 1840 Address index(noreg, rbx, Address::times_4); 1841 __ incrementl(ArrayAddress(table, index)); 1842 } 1843 1844 1845 void TemplateInterpreterGenerator::trace_bytecode(Template* t) { 1846 // Call a little run-time stub to avoid blow-up for each bytecode. 1847 // The run-time runtime saves the right registers, depending on 1848 // the tosca in-state for the given template. 1849 assert(Interpreter::trace_code(t->tos_in()) != NULL, 1850 "entry must have been generated"); 1851 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); 1852 } 1853 1854 1855 void TemplateInterpreterGenerator::stop_interpreter_at() { 1856 Label L; 1857 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), 1858 StopInterpreterAt); 1859 __ jcc(Assembler::notEqual, L); 1860 __ int3(); 1861 __ bind(L); 1862 } 1863 #endif // !PRODUCT 1864 #endif // CC_INTERP