1 /* 2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "asm/assembler.hpp" 28 #include "c1/c1_CodeStubs.hpp" 29 #include "c1/c1_Defs.hpp" 30 #include "c1/c1_MacroAssembler.hpp" 31 #include "c1/c1_Runtime1.hpp" 32 #include "compiler/disassembler.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "nativeInst_aarch64.hpp" 35 #include "oops/compiledICHolder.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "prims/jvmtiExport.hpp" 38 #include "register_aarch64.hpp" 39 #include "runtime/sharedRuntime.hpp" 40 #include "runtime/signature.hpp" 41 #include "runtime/vframe.hpp" 42 #include "runtime/vframeArray.hpp" 43 #include "vmreg_aarch64.inline.hpp" 44 #if INCLUDE_ALL_GCS 45 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" 46 #endif 47 48 49 // Implementation of StubAssembler 50 51 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) { 52 // setup registers 53 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different"); 54 assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different"); 55 assert(args_size >= 0, "illegal args_size"); 56 bool align_stack = false; 57 58 mov(c_rarg0, rthread); 59 set_num_rt_args(0); // Nothing on stack 60 61 Label retaddr; 62 set_last_Java_frame(sp, rfp, retaddr, rscratch1); 63 64 // do the call 65 lea(rscratch1, RuntimeAddress(entry)); 66 blrt(rscratch1, args_size + 1, 8, 1); 67 bind(retaddr); 68 int call_offset = offset(); 69 // verify callee-saved register 70 #ifdef ASSERT 71 push(r0, sp); 72 { Label L; 73 get_thread(r0); 74 cmp(rthread, r0); 75 br(Assembler::EQ, L); 76 stop("StubAssembler::call_RT: rthread not callee saved?"); 77 bind(L); 78 } 79 pop(r0, sp); 80 #endif 81 reset_last_Java_frame(true, true); 82 maybe_isb(); 83 84 // check for pending exceptions 85 { Label L; 86 // check for pending exceptions (java_thread is set upon return) 87 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset()))); 88 cbz(rscratch1, L); 89 // exception pending => remove activation and forward to exception handler 90 // make sure that the vm_results are cleared 91 if (oop_result1->is_valid()) { 92 str(zr, Address(rthread, JavaThread::vm_result_offset())); 93 } 94 if (metadata_result->is_valid()) { 95 str(zr, Address(rthread, JavaThread::vm_result_2_offset())); 96 } 97 if (frame_size() == no_frame_size) { 98 leave(); 99 far_jump(RuntimeAddress(StubRoutines::forward_exception_entry())); 100 } else if (_stub_id == Runtime1::forward_exception_id) { 101 should_not_reach_here(); 102 } else { 103 far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id))); 104 } 105 bind(L); 106 } 107 // get oop results if there are any and reset the values in the thread 108 if (oop_result1->is_valid()) { 109 get_vm_result(oop_result1, rthread); 110 } 111 if (metadata_result->is_valid()) { 112 get_vm_result_2(metadata_result, rthread); 113 } 114 return call_offset; 115 } 116 117 118 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { 119 mov(c_rarg1, arg1); 120 return call_RT(oop_result1, metadata_result, entry, 1); 121 } 122 123 124 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { 125 if (c_rarg1 == arg2) { 126 if (c_rarg2 == arg1) { 127 mov(rscratch1, arg1); 128 mov(arg1, arg2); 129 mov(arg2, rscratch1); 130 } else { 131 mov(c_rarg2, arg2); 132 mov(c_rarg1, arg1); 133 } 134 } else { 135 mov(c_rarg1, arg1); 136 mov(c_rarg2, arg2); 137 } 138 return call_RT(oop_result1, metadata_result, entry, 2); 139 } 140 141 142 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { 143 // if there is any conflict use the stack 144 if (arg1 == c_rarg2 || arg1 == c_rarg3 || 145 arg2 == c_rarg1 || arg1 == c_rarg3 || 146 arg3 == c_rarg1 || arg1 == c_rarg2) { 147 stp(arg3, arg2, Address(pre(sp, 2 * wordSize))); 148 stp(arg1, zr, Address(pre(sp, -2 * wordSize))); 149 ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize))); 150 ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize))); 151 } else { 152 mov(c_rarg1, arg1); 153 mov(c_rarg2, arg2); 154 mov(c_rarg3, arg3); 155 } 156 return call_RT(oop_result1, metadata_result, entry, 3); 157 } 158 159 // Implementation of StubFrame 160 161 class StubFrame: public StackObj { 162 private: 163 StubAssembler* _sasm; 164 165 public: 166 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments); 167 void load_argument(int offset_in_words, Register reg); 168 169 ~StubFrame(); 170 };; 171 172 173 #define __ _sasm-> 174 175 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) { 176 _sasm = sasm; 177 __ set_info(name, must_gc_arguments); 178 __ enter(); 179 } 180 181 // load parameters that were stored with LIR_Assembler::store_parameter 182 // Note: offsets for store_parameter and load_argument must match 183 void StubFrame::load_argument(int offset_in_words, Register reg) { 184 // rbp, + 0: link 185 // + 1: return address 186 // + 2: argument with offset 0 187 // + 3: argument with offset 1 188 // + 4: ... 189 190 __ ldr(reg, Address(rfp, (offset_in_words + 2) * BytesPerWord)); 191 } 192 193 194 StubFrame::~StubFrame() { 195 __ leave(); 196 __ ret(lr); 197 } 198 199 #undef __ 200 201 202 // Implementation of Runtime1 203 204 #define __ sasm-> 205 206 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2; 207 208 // Stack layout for saving/restoring all the registers needed during a runtime 209 // call (this includes deoptimization) 210 // Note: note that users of this frame may well have arguments to some runtime 211 // while these values are on the stack. These positions neglect those arguments 212 // but the code in save_live_registers will take the argument count into 213 // account. 214 // 215 216 enum reg_save_layout { 217 reg_save_frame_size = 32 /* float */ + 32 /* integer */ 218 }; 219 220 // Save off registers which might be killed by calls into the runtime. 221 // Tries to smart of about FP registers. In particular we separate 222 // saving and describing the FPU registers for deoptimization since we 223 // have to save the FPU registers twice if we describe them. The 224 // deopt blob is the only thing which needs to describe FPU registers. 225 // In all other cases it should be sufficient to simply save their 226 // current value. 227 228 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; 229 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; 230 static int reg_save_size_in_words; 231 static int frame_size_in_bytes = -1; 232 233 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { 234 int frame_size_in_bytes = reg_save_frame_size * BytesPerWord; 235 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 236 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); 237 OopMap* oop_map = new OopMap(frame_size_in_slots, 0); 238 239 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { 240 Register r = as_Register(i); 241 if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) { 242 int sp_offset = cpu_reg_save_offsets[i]; 243 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 244 r->as_VMReg()); 245 } 246 } 247 248 if (save_fpu_registers) { 249 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { 250 FloatRegister r = as_FloatRegister(i); 251 { 252 int sp_offset = fpu_reg_save_offsets[i]; 253 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 254 r->as_VMReg()); 255 } 256 } 257 } 258 return oop_map; 259 } 260 261 static OopMap* save_live_registers(StubAssembler* sasm, 262 bool save_fpu_registers = true) { 263 __ block_comment("save_live_registers"); 264 265 __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp 266 267 if (save_fpu_registers) { 268 for (int i = 30; i >= 0; i -= 2) 269 __ stpd(as_FloatRegister(i), as_FloatRegister(i+1), 270 Address(__ pre(sp, -2 * wordSize))); 271 } else { 272 __ add(sp, sp, -32 * wordSize); 273 } 274 275 return generate_oop_map(sasm, save_fpu_registers); 276 } 277 278 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { 279 if (restore_fpu_registers) { 280 for (int i = 0; i < 32; i += 2) 281 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1), 282 Address(__ post(sp, 2 * wordSize))); 283 } else { 284 __ add(sp, sp, 32 * wordSize); 285 } 286 287 __ pop(RegSet::range(r0, r29), sp); 288 } 289 290 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) { 291 292 if (restore_fpu_registers) { 293 for (int i = 0; i < 32; i += 2) 294 __ ldpd(as_FloatRegister(i), as_FloatRegister(i+1), 295 Address(__ post(sp, 2 * wordSize))); 296 } else { 297 __ add(sp, sp, 32 * wordSize); 298 } 299 300 __ ldp(zr, r1, Address(__ post(sp, 16))); 301 __ pop(RegSet::range(r2, r29), sp); 302 } 303 304 305 306 void Runtime1::initialize_pd() { 307 int i; 308 int sp_offset = 0; 309 310 // all float registers are saved explicitly 311 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here"); 312 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 313 fpu_reg_save_offsets[i] = sp_offset; 314 sp_offset += 2; // SP offsets are in halfwords 315 } 316 317 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 318 Register r = as_Register(i); 319 cpu_reg_save_offsets[i] = sp_offset; 320 sp_offset += 2; // SP offsets are in halfwords 321 } 322 } 323 324 325 // target: the entry point of the method that creates and posts the exception oop 326 // has_argument: true if the exception needs an argument (passed in rscratch1) 327 328 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { 329 // make a frame and preserve the caller's caller-save registers 330 OopMap* oop_map = save_live_registers(sasm); 331 int call_offset; 332 if (!has_argument) { 333 call_offset = __ call_RT(noreg, noreg, target); 334 } else { 335 call_offset = __ call_RT(noreg, noreg, target, rscratch1); 336 } 337 OopMapSet* oop_maps = new OopMapSet(); 338 oop_maps->add_gc_map(call_offset, oop_map); 339 340 __ should_not_reach_here(); 341 return oop_maps; 342 } 343 344 345 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) { 346 __ block_comment("generate_handle_exception"); 347 348 // incoming parameters 349 const Register exception_oop = r0; 350 const Register exception_pc = r3; 351 // other registers used in this stub 352 353 // Save registers, if required. 354 OopMapSet* oop_maps = new OopMapSet(); 355 OopMap* oop_map = NULL; 356 switch (id) { 357 case forward_exception_id: 358 // We're handling an exception in the context of a compiled frame. 359 // The registers have been saved in the standard places. Perform 360 // an exception lookup in the caller and dispatch to the handler 361 // if found. Otherwise unwind and dispatch to the callers 362 // exception handler. 363 oop_map = generate_oop_map(sasm, 1 /*thread*/); 364 365 // load and clear pending exception oop into r0 366 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset())); 367 __ str(zr, Address(rthread, Thread::pending_exception_offset())); 368 369 // load issuing PC (the return address for this stub) into r3 370 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord)); 371 372 // make sure that the vm_results are cleared (may be unnecessary) 373 __ str(zr, Address(rthread, JavaThread::vm_result_offset())); 374 __ str(zr, Address(rthread, JavaThread::vm_result_2_offset())); 375 break; 376 case handle_exception_nofpu_id: 377 case handle_exception_id: 378 // At this point all registers MAY be live. 379 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id); 380 break; 381 case handle_exception_from_callee_id: { 382 // At this point all registers except exception oop (r0) and 383 // exception pc (lr) are dead. 384 const int frame_size = 2 /*fp, return address*/; 385 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0); 386 sasm->set_frame_size(frame_size); 387 break; 388 } 389 default: 390 __ should_not_reach_here(); 391 break; 392 } 393 394 // verify that only r0 and r3 are valid at this time 395 __ invalidate_registers(false, true, true, false, true, true); 396 // verify that r0 contains a valid exception 397 __ verify_not_null_oop(exception_oop); 398 399 #ifdef ASSERT 400 // check that fields in JavaThread for exception oop and issuing pc are 401 // empty before writing to them 402 Label oop_empty; 403 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 404 __ cbz(rscratch1, oop_empty); 405 __ stop("exception oop already set"); 406 __ bind(oop_empty); 407 408 Label pc_empty; 409 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 410 __ cbz(rscratch1, pc_empty); 411 __ stop("exception pc already set"); 412 __ bind(pc_empty); 413 #endif 414 415 // save exception oop and issuing pc into JavaThread 416 // (exception handler will load it from here) 417 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset())); 418 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset())); 419 420 // patch throwing pc into return address (has bci & oop map) 421 __ str(exception_pc, Address(rfp, 1*BytesPerWord)); 422 423 // compute the exception handler. 424 // the exception oop and the throwing pc are read from the fields in JavaThread 425 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); 426 oop_maps->add_gc_map(call_offset, oop_map); 427 428 // r0: handler address 429 // will be the deopt blob if nmethod was deoptimized while we looked up 430 // handler regardless of whether handler existed in the nmethod. 431 432 // only r0 is valid at this time, all other registers have been destroyed by the runtime call 433 __ invalidate_registers(false, true, true, true, true, true); 434 435 // patch the return address, this stub will directly return to the exception handler 436 __ str(r0, Address(rfp, 1*BytesPerWord)); 437 438 switch (id) { 439 case forward_exception_id: 440 case handle_exception_nofpu_id: 441 case handle_exception_id: 442 // Restore the registers that were saved at the beginning. 443 restore_live_registers(sasm, id != handle_exception_nofpu_id); 444 break; 445 case handle_exception_from_callee_id: 446 // Pop the return address since we are possibly changing SP (restoring from BP). 447 __ leave(); 448 449 // Restore SP from FP if the exception PC is a method handle call site. 450 { 451 Label nope; 452 __ ldrw(rscratch1, Address(rthread, JavaThread::is_method_handle_return_offset())); 453 __ cbzw(rscratch1, nope); 454 __ mov(sp, rfp); 455 __ bind(nope); 456 } 457 458 __ ret(lr); // jump to exception handler 459 break; 460 default: ShouldNotReachHere(); 461 } 462 463 return oop_maps; 464 } 465 466 467 void Runtime1::generate_unwind_exception(StubAssembler *sasm) { 468 // incoming parameters 469 const Register exception_oop = r0; 470 // callee-saved copy of exception_oop during runtime call 471 const Register exception_oop_callee_saved = r19; 472 // other registers used in this stub 473 const Register exception_pc = r3; 474 const Register handler_addr = r1; 475 476 // verify that only r0, is valid at this time 477 __ invalidate_registers(false, true, true, true, true, true); 478 479 #ifdef ASSERT 480 // check that fields in JavaThread for exception oop and issuing pc are empty 481 Label oop_empty; 482 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 483 __ cbz(rscratch1, oop_empty); 484 __ stop("exception oop must be empty"); 485 __ bind(oop_empty); 486 487 Label pc_empty; 488 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 489 __ cbz(rscratch1, pc_empty); 490 __ stop("exception pc must be empty"); 491 __ bind(pc_empty); 492 #endif 493 494 // Save our return address because 495 // exception_handler_for_return_address will destroy it. We also 496 // save exception_oop 497 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize))); 498 499 // search the exception handler address of the caller (using the return address) 500 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, lr); 501 // r0: exception handler address of the caller 502 503 // Only R0 is valid at this time; all other registers have been 504 // destroyed by the call. 505 __ invalidate_registers(false, true, true, true, false, true); 506 507 // move result of call into correct register 508 __ mov(handler_addr, r0); 509 510 // get throwing pc (= return address). 511 // lr has been destroyed by the call 512 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize))); 513 __ mov(r3, lr); 514 515 __ verify_not_null_oop(exception_oop); 516 517 { 518 Label foo; 519 __ ldrw(rscratch1, Address(rthread, JavaThread::is_method_handle_return_offset())); 520 __ cbzw(rscratch1, foo); 521 __ mov(sp, rfp); 522 __ bind(foo); 523 } 524 525 // continue at exception handler (return address removed) 526 // note: do *not* remove arguments when unwinding the 527 // activation since the caller assumes having 528 // all arguments on the stack when entering the 529 // runtime to determine the exception handler 530 // (GC happens at call site with arguments!) 531 // r0: exception oop 532 // r3: throwing pc 533 // r1: exception handler 534 __ br(handler_addr); 535 } 536 537 538 539 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { 540 // use the maximum number of runtime-arguments here because it is difficult to 541 // distinguish each RT-Call. 542 // Note: This number affects also the RT-Call in generate_handle_exception because 543 // the oop-map is shared for all calls. 544 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 545 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 546 547 OopMap* oop_map = save_live_registers(sasm); 548 549 __ mov(c_rarg0, rthread); 550 Label retaddr; 551 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1); 552 // do the call 553 __ lea(rscratch1, RuntimeAddress(target)); 554 __ blrt(rscratch1, 1, 0, 1); 555 __ bind(retaddr); 556 OopMapSet* oop_maps = new OopMapSet(); 557 oop_maps->add_gc_map(__ offset(), oop_map); 558 // verify callee-saved register 559 #ifdef ASSERT 560 { Label L; 561 __ get_thread(rscratch1); 562 __ cmp(rthread, rscratch1); 563 __ br(Assembler::EQ, L); 564 __ stop("StubAssembler::call_RT: rthread not callee saved?"); 565 __ bind(L); 566 } 567 #endif 568 __ reset_last_Java_frame(true, false); 569 __ maybe_isb(); 570 571 // check for pending exceptions 572 { Label L; 573 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 574 __ cbz(rscratch1, L); 575 // exception pending => remove activation and forward to exception handler 576 577 { Label L1; 578 __ cbnz(r0, L1); // have we deoptimized? 579 __ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id))); 580 __ bind(L1); 581 } 582 583 // the deopt blob expects exceptions in the special fields of 584 // JavaThread, so copy and clear pending exception. 585 586 // load and clear pending exception 587 __ ldr(r0, Address(rthread, Thread::pending_exception_offset())); 588 __ str(zr, Address(rthread, Thread::pending_exception_offset())); 589 590 // check that there is really a valid exception 591 __ verify_not_null_oop(r0); 592 593 // load throwing pc: this is the return address of the stub 594 __ mov(r3, lr); 595 596 #ifdef ASSERT 597 // check that fields in JavaThread for exception oop and issuing pc are empty 598 Label oop_empty; 599 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 600 __ cbz(rscratch1, oop_empty); 601 __ stop("exception oop must be empty"); 602 __ bind(oop_empty); 603 604 Label pc_empty; 605 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 606 __ cbz(rscratch1, pc_empty); 607 __ stop("exception pc must be empty"); 608 __ bind(pc_empty); 609 #endif 610 611 // store exception oop and throwing pc to JavaThread 612 __ str(r0, Address(rthread, JavaThread::exception_oop_offset())); 613 __ str(r3, Address(rthread, JavaThread::exception_pc_offset())); 614 615 restore_live_registers(sasm); 616 617 __ leave(); 618 619 // Forward the exception directly to deopt blob. We can blow no 620 // registers and must leave throwing pc on the stack. A patch may 621 // have values live in registers so the entry point with the 622 // exception in tls. 623 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls())); 624 625 __ bind(L); 626 } 627 628 629 // Runtime will return true if the nmethod has been deoptimized during 630 // the patching process. In that case we must do a deopt reexecute instead. 631 632 Label reexecuteEntry, cont; 633 634 __ cbz(r0, cont); // have we deoptimized? 635 636 // Will reexecute. Proper return address is already on the stack we just restore 637 // registers, pop all of our frame but the return address and jump to the deopt blob 638 restore_live_registers(sasm); 639 __ leave(); 640 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 641 642 __ bind(cont); 643 restore_live_registers(sasm); 644 __ leave(); 645 __ ret(lr); 646 647 return oop_maps; 648 } 649 650 651 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { 652 653 const Register exception_oop = r0; 654 const Register exception_pc = r3; 655 656 // for better readability 657 const bool must_gc_arguments = true; 658 const bool dont_gc_arguments = false; 659 660 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu 661 bool save_fpu_registers = true; 662 663 // stub code & info for the different stubs 664 OopMapSet* oop_maps = NULL; 665 OopMap* oop_map = NULL; 666 switch (id) { 667 { 668 case forward_exception_id: 669 { 670 oop_maps = generate_handle_exception(id, sasm); 671 __ leave(); 672 __ ret(lr); 673 } 674 break; 675 676 case throw_div0_exception_id: 677 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments); 678 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); 679 } 680 break; 681 682 case throw_null_pointer_exception_id: 683 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments); 684 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); 685 } 686 break; 687 688 case new_instance_id: 689 case fast_new_instance_id: 690 case fast_new_instance_init_check_id: 691 { 692 Register klass = r3; // Incoming 693 Register obj = r0; // Result 694 695 if (id == new_instance_id) { 696 __ set_info("new_instance", dont_gc_arguments); 697 } else if (id == fast_new_instance_id) { 698 __ set_info("fast new_instance", dont_gc_arguments); 699 } else { 700 assert(id == fast_new_instance_init_check_id, "bad StubID"); 701 __ set_info("fast new_instance init check", dont_gc_arguments); 702 } 703 704 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && 705 UseTLAB && FastTLABRefill) { 706 Label slow_path; 707 Register obj_size = r2; 708 Register t1 = r19; 709 Register t2 = r4; 710 assert_different_registers(klass, obj, obj_size, t1, t2); 711 712 __ stp(r5, r19, Address(__ pre(sp, -2 * wordSize))); 713 714 if (id == fast_new_instance_init_check_id) { 715 // make sure the klass is initialized 716 __ ldrb(rscratch1, Address(klass, InstanceKlass::init_state_offset())); 717 __ cmpw(rscratch1, InstanceKlass::fully_initialized); 718 __ br(Assembler::NE, slow_path); 719 } 720 721 #ifdef ASSERT 722 // assert object can be fast path allocated 723 { 724 Label ok, not_ok; 725 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset())); 726 __ cmp(obj_size, 0u); 727 __ br(Assembler::LE, not_ok); // make sure it's an instance (LH > 0) 728 __ tstw(obj_size, Klass::_lh_instance_slow_path_bit); 729 __ br(Assembler::EQ, ok); 730 __ bind(not_ok); 731 __ stop("assert(can be fast path allocated)"); 732 __ should_not_reach_here(); 733 __ bind(ok); 734 } 735 #endif // ASSERT 736 737 // if we got here then the TLAB allocation failed, so try 738 // refilling the TLAB or allocating directly from eden. 739 Label retry_tlab, try_eden; 740 __ tlab_refill(retry_tlab, try_eden, slow_path); // does not destroy r3 (klass), returns r5 741 742 __ bind(retry_tlab); 743 744 // get the instance size (size is postive so movl is fine for 64bit) 745 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset())); 746 747 __ tlab_allocate(obj, obj_size, 0, t1, t2, slow_path); 748 749 __ initialize_object(obj, klass, obj_size, 0, t1, t2); 750 __ verify_oop(obj); 751 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize))); 752 __ ret(lr); 753 754 __ bind(try_eden); 755 // get the instance size (size is postive so movl is fine for 64bit) 756 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset())); 757 758 __ eden_allocate(obj, obj_size, 0, t1, slow_path); 759 __ incr_allocated_bytes(rthread, obj_size, 0, rscratch1); 760 761 __ initialize_object(obj, klass, obj_size, 0, t1, t2); 762 __ verify_oop(obj); 763 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize))); 764 __ ret(lr); 765 766 __ bind(slow_path); 767 __ ldp(r5, r19, Address(__ post(sp, 2 * wordSize))); 768 } 769 770 __ enter(); 771 OopMap* map = save_live_registers(sasm); 772 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass); 773 oop_maps = new OopMapSet(); 774 oop_maps->add_gc_map(call_offset, map); 775 restore_live_registers_except_r0(sasm); 776 __ verify_oop(obj); 777 __ leave(); 778 __ ret(lr); 779 780 // r0,: new instance 781 } 782 783 break; 784 785 case counter_overflow_id: 786 { 787 Register bci = r0, method = r1; 788 __ enter(); 789 OopMap* map = save_live_registers(sasm); 790 // Retrieve bci 791 __ ldrw(bci, Address(rfp, 2*BytesPerWord)); 792 // And a pointer to the Method* 793 __ ldr(method, Address(rfp, 3*BytesPerWord)); 794 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method); 795 oop_maps = new OopMapSet(); 796 oop_maps->add_gc_map(call_offset, map); 797 restore_live_registers(sasm); 798 __ leave(); 799 __ ret(lr); 800 } 801 break; 802 803 case new_type_array_id: 804 case new_object_array_id: 805 { 806 Register length = r19; // Incoming 807 Register klass = r3; // Incoming 808 Register obj = r0; // Result 809 810 if (id == new_type_array_id) { 811 __ set_info("new_type_array", dont_gc_arguments); 812 } else { 813 __ set_info("new_object_array", dont_gc_arguments); 814 } 815 816 #ifdef ASSERT 817 // assert object type is really an array of the proper kind 818 { 819 Label ok; 820 Register t0 = obj; 821 __ ldrw(t0, Address(klass, Klass::layout_helper_offset())); 822 __ asrw(t0, t0, Klass::_lh_array_tag_shift); 823 int tag = ((id == new_type_array_id) 824 ? Klass::_lh_array_tag_type_value 825 : Klass::_lh_array_tag_obj_value); 826 __ mov(rscratch1, tag); 827 __ cmpw(t0, rscratch1); 828 __ br(Assembler::EQ, ok); 829 __ stop("assert(is an array klass)"); 830 __ should_not_reach_here(); 831 __ bind(ok); 832 } 833 #endif // ASSERT 834 835 if (UseTLAB && FastTLABRefill) { 836 Register arr_size = r4; 837 Register t1 = r2; 838 Register t2 = r5; 839 Label slow_path; 840 assert_different_registers(length, klass, obj, arr_size, t1, t2); 841 842 // check that array length is small enough for fast path. 843 __ mov(rscratch1, C1_MacroAssembler::max_array_allocation_length); 844 __ cmpw(length, rscratch1); 845 __ br(Assembler::HI, slow_path); 846 847 // if we got here then the TLAB allocation failed, so try 848 // refilling the TLAB or allocating directly from eden. 849 Label retry_tlab, try_eden; 850 const Register thread = 851 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves r19 & r3, returns rthread 852 853 __ bind(retry_tlab); 854 855 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F)) 856 // since size is positive ldrw does right thing on 64bit 857 __ ldrw(t1, Address(klass, Klass::layout_helper_offset())); 858 __ lslvw(arr_size, length, t1); 859 __ ubfx(t1, t1, Klass::_lh_header_size_shift, 860 exact_log2(Klass::_lh_header_size_mask + 1)); 861 __ add(arr_size, arr_size, t1); 862 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up 863 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask); 864 865 __ tlab_allocate(obj, arr_size, 0, t1, t2, slow_path); // preserves arr_size 866 867 __ initialize_header(obj, klass, length, t1, t2); 868 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte))); 869 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise"); 870 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise"); 871 __ andr(t1, t1, Klass::_lh_header_size_mask); 872 __ sub(arr_size, arr_size, t1); // body length 873 __ add(t1, t1, obj); // body start 874 __ initialize_body(t1, arr_size, 0, t2); 875 __ verify_oop(obj); 876 877 __ ret(lr); 878 879 __ bind(try_eden); 880 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F)) 881 // since size is positive ldrw does right thing on 64bit 882 __ ldrw(t1, Address(klass, Klass::layout_helper_offset())); 883 // since size is postive movw does right thing on 64bit 884 __ movw(arr_size, length); 885 __ lslvw(arr_size, length, t1); 886 __ ubfx(t1, t1, Klass::_lh_header_size_shift, 887 exact_log2(Klass::_lh_header_size_mask + 1)); 888 __ add(arr_size, arr_size, t1); 889 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up 890 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask); 891 892 __ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size 893 __ incr_allocated_bytes(thread, arr_size, 0, rscratch1); 894 895 __ initialize_header(obj, klass, length, t1, t2); 896 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte))); 897 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise"); 898 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise"); 899 __ andr(t1, t1, Klass::_lh_header_size_mask); 900 __ sub(arr_size, arr_size, t1); // body length 901 __ add(t1, t1, obj); // body start 902 __ initialize_body(t1, arr_size, 0, t2); 903 __ verify_oop(obj); 904 905 __ ret(lr); 906 907 __ bind(slow_path); 908 } 909 910 __ enter(); 911 OopMap* map = save_live_registers(sasm); 912 int call_offset; 913 if (id == new_type_array_id) { 914 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length); 915 } else { 916 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length); 917 } 918 919 oop_maps = new OopMapSet(); 920 oop_maps->add_gc_map(call_offset, map); 921 restore_live_registers_except_r0(sasm); 922 923 __ verify_oop(obj); 924 __ leave(); 925 __ ret(lr); 926 927 // r0: new array 928 } 929 break; 930 931 case new_multi_array_id: 932 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments); 933 // r0,: klass 934 // r19,: rank 935 // r2: address of 1st dimension 936 OopMap* map = save_live_registers(sasm); 937 __ mov(c_rarg1, r0); 938 __ mov(c_rarg3, r2); 939 __ mov(c_rarg2, r19); 940 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3); 941 942 oop_maps = new OopMapSet(); 943 oop_maps->add_gc_map(call_offset, map); 944 restore_live_registers_except_r0(sasm); 945 946 // r0,: new multi array 947 __ verify_oop(r0); 948 } 949 break; 950 951 case register_finalizer_id: 952 { 953 __ set_info("register_finalizer", dont_gc_arguments); 954 955 // This is called via call_runtime so the arguments 956 // will be place in C abi locations 957 958 __ verify_oop(c_rarg0); 959 960 // load the klass and check the has finalizer flag 961 Label register_finalizer; 962 Register t = r5; 963 __ load_klass(t, r0); 964 __ ldrw(t, Address(t, Klass::access_flags_offset())); 965 __ tst(t, JVM_ACC_HAS_FINALIZER); 966 __ br(Assembler::NE, register_finalizer); 967 __ ret(lr); 968 969 __ bind(register_finalizer); 970 __ enter(); 971 OopMap* oop_map = save_live_registers(sasm); 972 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0); 973 oop_maps = new OopMapSet(); 974 oop_maps->add_gc_map(call_offset, oop_map); 975 976 // Now restore all the live registers 977 restore_live_registers(sasm); 978 979 __ leave(); 980 __ ret(lr); 981 } 982 break; 983 984 case throw_class_cast_exception_id: 985 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments); 986 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); 987 } 988 break; 989 990 case throw_incompatible_class_change_error_id: 991 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments); 992 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); 993 } 994 break; 995 996 case slow_subtype_check_id: 997 { 998 // Typical calling sequence: 999 // __ push(klass_RInfo); // object klass or other subclass 1000 // __ push(sup_k_RInfo); // array element klass or other superclass 1001 // __ bl(slow_subtype_check); 1002 // Note that the subclass is pushed first, and is therefore deepest. 1003 enum layout { 1004 r0_off, r0_off_hi, 1005 r2_off, r2_off_hi, 1006 r4_off, r4_off_hi, 1007 r5_off, r5_off_hi, 1008 sup_k_off, sup_k_off_hi, 1009 klass_off, klass_off_hi, 1010 framesize, 1011 result_off = sup_k_off 1012 }; 1013 1014 __ set_info("slow_subtype_check", dont_gc_arguments); 1015 __ push(RegSet::of(r0, r2, r4, r5), sp); 1016 1017 // This is called by pushing args and not with C abi 1018 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass 1019 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass 1020 1021 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); 1022 1023 Label miss; 1024 __ check_klass_subtype_slow_path(r4, r0, r2, r5, NULL, &miss); 1025 1026 // fallthrough on success: 1027 __ mov(rscratch1, 1); 1028 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 1029 __ pop(RegSet::of(r0, r2, r4, r5), sp); 1030 __ ret(lr); 1031 1032 __ bind(miss); 1033 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 1034 __ pop(RegSet::of(r0, r2, r4, r5), sp); 1035 __ ret(lr); 1036 } 1037 break; 1038 1039 case monitorenter_nofpu_id: 1040 save_fpu_registers = false; 1041 // fall through 1042 case monitorenter_id: 1043 { 1044 StubFrame f(sasm, "monitorenter", dont_gc_arguments); 1045 OopMap* map = save_live_registers(sasm, save_fpu_registers); 1046 1047 // Called with store_parameter and not C abi 1048 1049 f.load_argument(1, r0); // r0,: object 1050 f.load_argument(0, r1); // r1,: lock address 1051 1052 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1); 1053 1054 oop_maps = new OopMapSet(); 1055 oop_maps->add_gc_map(call_offset, map); 1056 restore_live_registers(sasm, save_fpu_registers); 1057 } 1058 break; 1059 1060 case monitorexit_nofpu_id: 1061 save_fpu_registers = false; 1062 // fall through 1063 case monitorexit_id: 1064 { 1065 StubFrame f(sasm, "monitorexit", dont_gc_arguments); 1066 OopMap* map = save_live_registers(sasm, save_fpu_registers); 1067 1068 // Called with store_parameter and not C abi 1069 1070 f.load_argument(0, r0); // r0,: lock address 1071 1072 // note: really a leaf routine but must setup last java sp 1073 // => use call_RT for now (speed can be improved by 1074 // doing last java sp setup manually) 1075 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0); 1076 1077 oop_maps = new OopMapSet(); 1078 oop_maps->add_gc_map(call_offset, map); 1079 restore_live_registers(sasm, save_fpu_registers); 1080 } 1081 break; 1082 1083 case deoptimize_id: 1084 { 1085 StubFrame f(sasm, "deoptimize", dont_gc_arguments); 1086 OopMap* oop_map = save_live_registers(sasm); 1087 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize)); 1088 oop_maps = new OopMapSet(); 1089 oop_maps->add_gc_map(call_offset, oop_map); 1090 restore_live_registers(sasm); 1091 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 1092 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 1093 __ leave(); 1094 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 1095 } 1096 break; 1097 1098 case throw_range_check_failed_id: 1099 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments); 1100 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); 1101 } 1102 break; 1103 1104 case unwind_exception_id: 1105 { __ set_info("unwind_exception", dont_gc_arguments); 1106 // note: no stubframe since we are about to leave the current 1107 // activation and we are calling a leaf VM function only. 1108 generate_unwind_exception(sasm); 1109 } 1110 break; 1111 1112 case access_field_patching_id: 1113 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments); 1114 // we should set up register map 1115 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); 1116 } 1117 break; 1118 1119 case load_klass_patching_id: 1120 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments); 1121 // we should set up register map 1122 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); 1123 } 1124 break; 1125 1126 case load_mirror_patching_id: 1127 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments); 1128 // we should set up register map 1129 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); 1130 } 1131 break; 1132 1133 case load_appendix_patching_id: 1134 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments); 1135 // we should set up register map 1136 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); 1137 } 1138 break; 1139 1140 case handle_exception_nofpu_id: 1141 case handle_exception_id: 1142 { StubFrame f(sasm, "handle_exception", dont_gc_arguments); 1143 oop_maps = generate_handle_exception(id, sasm); 1144 } 1145 break; 1146 1147 case handle_exception_from_callee_id: 1148 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments); 1149 oop_maps = generate_handle_exception(id, sasm); 1150 } 1151 break; 1152 1153 case throw_index_exception_id: 1154 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments); 1155 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); 1156 } 1157 break; 1158 1159 case throw_array_store_exception_id: 1160 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments); 1161 // tos + 0: link 1162 // + 1: return address 1163 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); 1164 } 1165 break; 1166 1167 #if INCLUDE_ALL_GCS 1168 1169 // Registers to be saved around calls to g1_wb_pre or g1_wb_post 1170 #define G1_SAVE_REGS (RegSet::range(r0, r18) - RegSet::of(rscratch1, rscratch2)) 1171 1172 case g1_pre_barrier_slow_id: 1173 { 1174 StubFrame f(sasm, "g1_pre_barrier", dont_gc_arguments); 1175 // arg0 : previous value of memory 1176 1177 BarrierSet* bs = Universe::heap()->barrier_set(); 1178 if (bs->kind() != BarrierSet::G1SATBCTLogging) { 1179 __ mov(r0, (int)id); 1180 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0); 1181 __ should_not_reach_here(); 1182 break; 1183 } 1184 1185 const Register pre_val = r0; 1186 const Register thread = rthread; 1187 const Register tmp = rscratch1; 1188 1189 Address in_progress(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 1190 PtrQueue::byte_offset_of_active())); 1191 1192 Address queue_index(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 1193 PtrQueue::byte_offset_of_index())); 1194 Address buffer(thread, in_bytes(JavaThread::satb_mark_queue_offset() + 1195 PtrQueue::byte_offset_of_buf())); 1196 1197 Label done; 1198 Label runtime; 1199 1200 // Can we store original value in the thread's buffer? 1201 __ ldr(tmp, queue_index); 1202 __ cbz(tmp, runtime); 1203 1204 __ sub(tmp, tmp, wordSize); 1205 __ str(tmp, queue_index); 1206 __ ldr(rscratch2, buffer); 1207 __ add(tmp, tmp, rscratch2); 1208 f.load_argument(0, rscratch2); 1209 __ str(rscratch2, Address(tmp, 0)); 1210 __ b(done); 1211 1212 __ bind(runtime); 1213 __ push(G1_SAVE_REGS, sp); 1214 f.load_argument(0, pre_val); 1215 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), pre_val, thread); 1216 __ pop(G1_SAVE_REGS, sp); 1217 __ bind(done); 1218 } 1219 break; 1220 case g1_post_barrier_slow_id: 1221 { 1222 StubFrame f(sasm, "g1_post_barrier", dont_gc_arguments); 1223 1224 // arg0: store_address 1225 Address store_addr(rfp, 2*BytesPerWord); 1226 1227 BarrierSet* bs = Universe::heap()->barrier_set(); 1228 CardTableModRefBS* ct = (CardTableModRefBS*)bs; 1229 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); 1230 1231 Label done; 1232 Label runtime; 1233 1234 // At this point we know new_value is non-NULL and the new_value crosses regions. 1235 // Must check to see if card is already dirty 1236 1237 const Register thread = rthread; 1238 1239 Address queue_index(thread, in_bytes(JavaThread::dirty_card_queue_offset() + 1240 PtrQueue::byte_offset_of_index())); 1241 Address buffer(thread, in_bytes(JavaThread::dirty_card_queue_offset() + 1242 PtrQueue::byte_offset_of_buf())); 1243 1244 const Register card_addr = rscratch2; 1245 ExternalAddress cardtable((address) ct->byte_map_base); 1246 1247 f.load_argument(0, card_addr); 1248 __ lsr(card_addr, card_addr, CardTableModRefBS::card_shift); 1249 unsigned long offset; 1250 __ adrp(rscratch1, cardtable, offset); 1251 __ add(card_addr, card_addr, rscratch1); 1252 __ ldrb(rscratch1, Address(card_addr, offset)); 1253 __ cmpw(rscratch1, (int)G1SATBCardTableModRefBS::g1_young_card_val()); 1254 __ br(Assembler::EQ, done); 1255 1256 assert((int)CardTableModRefBS::dirty_card_val() == 0, "must be 0"); 1257 1258 __ membar(Assembler::StoreLoad); 1259 __ ldrb(rscratch1, Address(card_addr, offset)); 1260 __ cbzw(rscratch1, done); 1261 1262 // storing region crossing non-NULL, card is clean. 1263 // dirty card and log. 1264 __ strb(zr, Address(card_addr, offset)); 1265 1266 __ ldr(rscratch1, queue_index); 1267 __ cbz(rscratch1, runtime); 1268 __ sub(rscratch1, rscratch1, wordSize); 1269 __ str(rscratch1, queue_index); 1270 1271 const Register buffer_addr = r0; 1272 1273 __ push(RegSet::of(r0, r1), sp); 1274 __ ldr(buffer_addr, buffer); 1275 __ str(card_addr, Address(buffer_addr, rscratch1)); 1276 __ pop(RegSet::of(r0, r1), sp); 1277 __ b(done); 1278 1279 __ bind(runtime); 1280 __ push(G1_SAVE_REGS, sp); 1281 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), card_addr, thread); 1282 __ pop(G1_SAVE_REGS, sp); 1283 __ bind(done); 1284 1285 } 1286 break; 1287 #endif 1288 1289 case predicate_failed_trap_id: 1290 { 1291 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments); 1292 1293 OopMap* map = save_live_registers(sasm); 1294 1295 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); 1296 oop_maps = new OopMapSet(); 1297 oop_maps->add_gc_map(call_offset, map); 1298 restore_live_registers(sasm); 1299 __ leave(); 1300 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 1301 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 1302 1303 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 1304 } 1305 break; 1306 1307 1308 default: 1309 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments); 1310 __ mov(r0, (int)id); 1311 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0); 1312 __ should_not_reach_here(); 1313 } 1314 break; 1315 } 1316 } 1317 return oop_maps; 1318 } 1319 1320 #undef __ 1321 1322 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }