1 /* 2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, 2021, 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 "compiler/oopMap.hpp" 34 #include "gc/shared/cardTable.hpp" 35 #include "gc/shared/cardTableBarrierSet.hpp" 36 #include "gc/shared/collectedHeap.hpp" 37 #include "gc/shared/tlab_globals.hpp" 38 #include "interpreter/interpreter.hpp" 39 #include "memory/universe.hpp" 40 #include "nativeInst_aarch64.hpp" 41 #include "oops/compiledICHolder.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "register_aarch64.hpp" 45 #include "runtime/sharedRuntime.hpp" 46 #include "runtime/signature.hpp" 47 #include "runtime/stubRoutines.hpp" 48 #include "runtime/vframe.hpp" 49 #include "runtime/vframeArray.hpp" 50 #include "utilities/powerOfTwo.hpp" 51 #include "vmreg_aarch64.inline.hpp" 52 53 54 // Implementation of StubAssembler 55 56 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) { 57 // setup registers 58 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different"); 59 assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different"); 60 assert(args_size >= 0, "illegal args_size"); 61 bool align_stack = false; 62 63 mov(c_rarg0, rthread); 64 set_num_rt_args(0); // Nothing on stack 65 66 Label retaddr; 67 set_last_Java_frame(sp, rfp, retaddr, rscratch1); 68 69 // do the call 70 lea(rscratch1, RuntimeAddress(entry)); 71 blr(rscratch1); 72 bind(retaddr); 73 int call_offset = offset(); 74 // verify callee-saved register 75 #ifdef ASSERT 76 push(r0, sp); 77 { Label L; 78 get_thread(r0); 79 cmp(rthread, r0); 80 br(Assembler::EQ, L); 81 stop("StubAssembler::call_RT: rthread not callee saved?"); 82 bind(L); 83 } 84 pop(r0, sp); 85 #endif 86 reset_last_Java_frame(true); 87 88 // check for pending exceptions 89 { Label L; 90 // check for pending exceptions (java_thread is set upon return) 91 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset()))); 92 cbz(rscratch1, L); 93 // exception pending => remove activation and forward to exception handler 94 // make sure that the vm_results are cleared 95 if (oop_result1->is_valid()) { 96 str(zr, Address(rthread, JavaThread::vm_result_offset())); 97 } 98 if (metadata_result->is_valid()) { 99 str(zr, Address(rthread, JavaThread::vm_result_2_offset())); 100 } 101 if (frame_size() == no_frame_size) { 102 leave(); 103 far_jump(RuntimeAddress(StubRoutines::forward_exception_entry())); 104 } else if (_stub_id == Runtime1::forward_exception_id) { 105 should_not_reach_here(); 106 } else { 107 far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id))); 108 } 109 bind(L); 110 } 111 // get oop results if there are any and reset the values in the thread 112 if (oop_result1->is_valid()) { 113 get_vm_result(oop_result1, rthread); 114 } 115 if (metadata_result->is_valid()) { 116 get_vm_result_2(metadata_result, rthread); 117 } 118 return call_offset; 119 } 120 121 122 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { 123 mov(c_rarg1, arg1); 124 return call_RT(oop_result1, metadata_result, entry, 1); 125 } 126 127 128 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { 129 if (c_rarg1 == arg2) { 130 if (c_rarg2 == arg1) { 131 mov(rscratch1, arg1); 132 mov(arg1, arg2); 133 mov(arg2, rscratch1); 134 } else { 135 mov(c_rarg2, arg2); 136 mov(c_rarg1, arg1); 137 } 138 } else { 139 mov(c_rarg1, arg1); 140 mov(c_rarg2, arg2); 141 } 142 return call_RT(oop_result1, metadata_result, entry, 2); 143 } 144 145 146 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { 147 // if there is any conflict use the stack 148 if (arg1 == c_rarg2 || arg1 == c_rarg3 || 149 arg2 == c_rarg1 || arg2 == c_rarg3 || 150 arg3 == c_rarg1 || arg3 == c_rarg2) { 151 stp(arg3, arg2, Address(pre(sp, -2 * wordSize))); 152 stp(arg1, zr, Address(pre(sp, -2 * wordSize))); 153 ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize))); 154 ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize))); 155 } else { 156 mov(c_rarg1, arg1); 157 mov(c_rarg2, arg2); 158 mov(c_rarg3, arg3); 159 } 160 return call_RT(oop_result1, metadata_result, entry, 3); 161 } 162 163 enum return_state_t { 164 does_not_return, requires_return 165 }; 166 167 168 // Implementation of StubFrame 169 170 class StubFrame: public StackObj { 171 private: 172 StubAssembler* _sasm; 173 bool _return_state; 174 175 public: 176 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state=requires_return); 177 void load_argument(int offset_in_words, Register reg); 178 179 ~StubFrame(); 180 };; 181 182 void StubAssembler::prologue(const char* name, bool must_gc_arguments) { 183 set_info(name, must_gc_arguments); 184 enter(); 185 } 186 187 void StubAssembler::epilogue() { 188 leave(); 189 ret(lr); 190 } 191 192 #define __ _sasm-> 193 194 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state) { 195 _sasm = sasm; 196 _return_state = return_state; 197 __ prologue(name, must_gc_arguments); 198 } 199 200 // load parameters that were stored with LIR_Assembler::store_parameter 201 // Note: offsets for store_parameter and load_argument must match 202 void StubFrame::load_argument(int offset_in_words, Register reg) { 203 __ load_parameter(offset_in_words, reg); 204 } 205 206 StubFrame::~StubFrame() { 207 if (_return_state == requires_return) { 208 __ epilogue(); 209 } else { 210 __ should_not_reach_here(); 211 } 212 } 213 214 #undef __ 215 216 217 // Implementation of Runtime1 218 219 #define __ sasm-> 220 221 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2; 222 223 // Stack layout for saving/restoring all the registers needed during a runtime 224 // call (this includes deoptimization) 225 // Note: note that users of this frame may well have arguments to some runtime 226 // while these values are on the stack. These positions neglect those arguments 227 // but the code in save_live_registers will take the argument count into 228 // account. 229 // 230 231 enum reg_save_layout { 232 reg_save_frame_size = 32 /* float */ + 32 /* integer */ 233 }; 234 235 // Save off registers which might be killed by calls into the runtime. 236 // Tries to smart of about FP registers. In particular we separate 237 // saving and describing the FPU registers for deoptimization since we 238 // have to save the FPU registers twice if we describe them. The 239 // deopt blob is the only thing which needs to describe FPU registers. 240 // In all other cases it should be sufficient to simply save their 241 // current value. 242 243 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; 244 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; 245 static int reg_save_size_in_words; 246 static int frame_size_in_bytes = -1; 247 248 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { 249 int frame_size_in_bytes = reg_save_frame_size * BytesPerWord; 250 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 251 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); 252 OopMap* oop_map = new OopMap(frame_size_in_slots, 0); 253 254 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { 255 Register r = as_Register(i); 256 if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) { 257 int sp_offset = cpu_reg_save_offsets[i]; 258 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 259 r->as_VMReg()); 260 } 261 } 262 263 if (save_fpu_registers) { 264 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { 265 FloatRegister r = as_FloatRegister(i); 266 { 267 int sp_offset = fpu_reg_save_offsets[i]; 268 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 269 r->as_VMReg()); 270 } 271 } 272 } 273 return oop_map; 274 } 275 276 static OopMap* save_live_registers(StubAssembler* sasm, 277 bool save_fpu_registers = true) { 278 __ block_comment("save_live_registers"); 279 280 __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp 281 282 if (save_fpu_registers) { 283 for (int i = 31; i>= 0; i -= 4) { 284 __ sub(sp, sp, 4 * wordSize); // no pre-increment for st1. Emulate it without modifying other registers 285 __ st1(as_FloatRegister(i-3), as_FloatRegister(i-2), as_FloatRegister(i-1), 286 as_FloatRegister(i), __ T1D, Address(sp)); 287 } 288 } else { 289 __ add(sp, sp, -32 * wordSize); 290 } 291 292 return generate_oop_map(sasm, save_fpu_registers); 293 } 294 295 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { 296 if (restore_fpu_registers) { 297 for (int i = 0; i < 32; i += 4) 298 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), 299 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); 300 } else { 301 __ add(sp, sp, 32 * wordSize); 302 } 303 304 __ pop(RegSet::range(r0, r29), sp); 305 } 306 307 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) { 308 309 if (restore_fpu_registers) { 310 for (int i = 0; i < 32; i += 4) 311 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), 312 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); 313 } else { 314 __ add(sp, sp, 32 * wordSize); 315 } 316 317 __ ldp(zr, r1, Address(__ post(sp, 16))); 318 __ pop(RegSet::range(r2, r29), sp); 319 } 320 321 322 323 void Runtime1::initialize_pd() { 324 int i; 325 int sp_offset = 0; 326 327 // all float registers are saved explicitly 328 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here"); 329 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 330 fpu_reg_save_offsets[i] = sp_offset; 331 sp_offset += 2; // SP offsets are in halfwords 332 } 333 334 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 335 Register r = as_Register(i); 336 cpu_reg_save_offsets[i] = sp_offset; 337 sp_offset += 2; // SP offsets are in halfwords 338 } 339 } 340 341 342 // target: the entry point of the method that creates and posts the exception oop 343 // has_argument: true if the exception needs arguments (passed in rscratch1 and rscratch2) 344 345 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { 346 // make a frame and preserve the caller's caller-save registers 347 OopMap* oop_map = save_live_registers(sasm); 348 int call_offset; 349 if (!has_argument) { 350 call_offset = __ call_RT(noreg, noreg, target); 351 } else { 352 __ mov(c_rarg1, rscratch1); 353 __ mov(c_rarg2, rscratch2); 354 call_offset = __ call_RT(noreg, noreg, target); 355 } 356 OopMapSet* oop_maps = new OopMapSet(); 357 oop_maps->add_gc_map(call_offset, oop_map); 358 return oop_maps; 359 } 360 361 362 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) { 363 __ block_comment("generate_handle_exception"); 364 365 // incoming parameters 366 const Register exception_oop = r0; 367 const Register exception_pc = r3; 368 // other registers used in this stub 369 370 // Save registers, if required. 371 OopMapSet* oop_maps = new OopMapSet(); 372 OopMap* oop_map = nullptr; 373 switch (id) { 374 case forward_exception_id: 375 // We're handling an exception in the context of a compiled frame. 376 // The registers have been saved in the standard places. Perform 377 // an exception lookup in the caller and dispatch to the handler 378 // if found. Otherwise unwind and dispatch to the callers 379 // exception handler. 380 oop_map = generate_oop_map(sasm, 1 /*thread*/); 381 382 // load and clear pending exception oop into r0 383 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset())); 384 __ str(zr, Address(rthread, Thread::pending_exception_offset())); 385 386 // load issuing PC (the return address for this stub) into r3 387 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord)); 388 __ authenticate_return_address(exception_pc); 389 390 // make sure that the vm_results are cleared (may be unnecessary) 391 __ str(zr, Address(rthread, JavaThread::vm_result_offset())); 392 __ str(zr, Address(rthread, JavaThread::vm_result_2_offset())); 393 break; 394 case handle_exception_nofpu_id: 395 case handle_exception_id: 396 // At this point all registers MAY be live. 397 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id); 398 break; 399 case handle_exception_from_callee_id: { 400 // At this point all registers except exception oop (r0) and 401 // exception pc (lr) are dead. 402 const int frame_size = 2 /*fp, return address*/; 403 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0); 404 sasm->set_frame_size(frame_size); 405 break; 406 } 407 default: ShouldNotReachHere(); 408 } 409 410 // verify that only r0 and r3 are valid at this time 411 __ invalidate_registers(false, true, true, false, true, true); 412 // verify that r0 contains a valid exception 413 __ verify_not_null_oop(exception_oop); 414 415 #ifdef ASSERT 416 // check that fields in JavaThread for exception oop and issuing pc are 417 // empty before writing to them 418 Label oop_empty; 419 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 420 __ cbz(rscratch1, oop_empty); 421 __ stop("exception oop already set"); 422 __ bind(oop_empty); 423 424 Label pc_empty; 425 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 426 __ cbz(rscratch1, pc_empty); 427 __ stop("exception pc already set"); 428 __ bind(pc_empty); 429 #endif 430 431 // save exception oop and issuing pc into JavaThread 432 // (exception handler will load it from here) 433 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset())); 434 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset())); 435 436 // patch throwing pc into return address (has bci & oop map) 437 __ protect_return_address(exception_pc); 438 __ str(exception_pc, Address(rfp, 1*BytesPerWord)); 439 440 // compute the exception handler. 441 // the exception oop and the throwing pc are read from the fields in JavaThread 442 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); 443 oop_maps->add_gc_map(call_offset, oop_map); 444 445 // r0: handler address 446 // will be the deopt blob if nmethod was deoptimized while we looked up 447 // handler regardless of whether handler existed in the nmethod. 448 449 // only r0 is valid at this time, all other registers have been destroyed by the runtime call 450 __ invalidate_registers(false, true, true, true, true, true); 451 452 // patch the return address, this stub will directly return to the exception handler 453 __ protect_return_address(r0); 454 __ str(r0, Address(rfp, 1*BytesPerWord)); 455 456 switch (id) { 457 case forward_exception_id: 458 case handle_exception_nofpu_id: 459 case handle_exception_id: 460 // Restore the registers that were saved at the beginning. 461 restore_live_registers(sasm, id != handle_exception_nofpu_id); 462 break; 463 case handle_exception_from_callee_id: 464 break; 465 default: ShouldNotReachHere(); 466 } 467 468 return oop_maps; 469 } 470 471 472 void Runtime1::generate_unwind_exception(StubAssembler *sasm) { 473 // incoming parameters 474 const Register exception_oop = r0; 475 // callee-saved copy of exception_oop during runtime call 476 const Register exception_oop_callee_saved = r19; 477 // other registers used in this stub 478 const Register exception_pc = r3; 479 const Register handler_addr = r1; 480 481 if (AbortVMOnException) { 482 __ mov(rscratch1, exception_oop); 483 __ enter(); 484 save_live_registers(sasm); 485 __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), rscratch1); 486 restore_live_registers(sasm); 487 __ leave(); 488 } 489 490 // verify that only r0, is valid at this time 491 __ invalidate_registers(false, true, true, true, true, true); 492 493 #ifdef ASSERT 494 // check that fields in JavaThread for exception oop and issuing pc are empty 495 Label oop_empty; 496 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 497 __ cbz(rscratch1, oop_empty); 498 __ stop("exception oop must be empty"); 499 __ bind(oop_empty); 500 501 Label pc_empty; 502 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 503 __ cbz(rscratch1, pc_empty); 504 __ stop("exception pc must be empty"); 505 __ bind(pc_empty); 506 #endif 507 508 // Save our return address because 509 // exception_handler_for_return_address will destroy it. We also 510 // save exception_oop 511 __ mov(r3, lr); 512 __ protect_return_address(); 513 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize))); 514 515 // search the exception handler address of the caller (using the return address) 516 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, r3); 517 // r0: exception handler address of the caller 518 519 // Only R0 is valid at this time; all other registers have been 520 // destroyed by the call. 521 __ invalidate_registers(false, true, true, true, false, true); 522 523 // move result of call into correct register 524 __ mov(handler_addr, r0); 525 526 // get throwing pc (= return address). 527 // lr has been destroyed by the call 528 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize))); 529 __ authenticate_return_address(); 530 __ mov(r3, lr); 531 532 __ verify_not_null_oop(exception_oop); 533 534 // continue at exception handler (return address removed) 535 // note: do *not* remove arguments when unwinding the 536 // activation since the caller assumes having 537 // all arguments on the stack when entering the 538 // runtime to determine the exception handler 539 // (GC happens at call site with arguments!) 540 // r0: exception oop 541 // r3: throwing pc 542 // r1: exception handler 543 __ br(handler_addr); 544 } 545 546 547 548 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { 549 // use the maximum number of runtime-arguments here because it is difficult to 550 // distinguish each RT-Call. 551 // Note: This number affects also the RT-Call in generate_handle_exception because 552 // the oop-map is shared for all calls. 553 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 554 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 555 556 OopMap* oop_map = save_live_registers(sasm); 557 558 __ mov(c_rarg0, rthread); 559 Label retaddr; 560 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1); 561 // do the call 562 __ lea(rscratch1, RuntimeAddress(target)); 563 __ blr(rscratch1); 564 __ bind(retaddr); 565 OopMapSet* oop_maps = new OopMapSet(); 566 oop_maps->add_gc_map(__ offset(), oop_map); 567 // verify callee-saved register 568 #ifdef ASSERT 569 { Label L; 570 __ get_thread(rscratch1); 571 __ cmp(rthread, rscratch1); 572 __ br(Assembler::EQ, L); 573 __ stop("StubAssembler::call_RT: rthread not callee saved?"); 574 __ bind(L); 575 } 576 #endif 577 578 __ reset_last_Java_frame(true); 579 580 #ifdef ASSERT 581 // check that fields in JavaThread for exception oop and issuing pc are empty 582 Label oop_empty; 583 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 584 __ cbz(rscratch1, oop_empty); 585 __ stop("exception oop must be empty"); 586 __ bind(oop_empty); 587 588 Label pc_empty; 589 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 590 __ cbz(rscratch1, pc_empty); 591 __ stop("exception pc must be empty"); 592 __ bind(pc_empty); 593 #endif 594 595 // Runtime will return true if the nmethod has been deoptimized, this is the 596 // expected scenario and anything else is an error. Note that we maintain a 597 // check on the result purely as a defensive measure. 598 Label no_deopt; 599 __ cbz(r0, no_deopt); // Have we deoptimized? 600 601 // Perform a re-execute. The proper return address is already on the stack, 602 // we just need to restore registers, pop all of our frame but the return 603 // address and jump to the deopt blob. 604 restore_live_registers(sasm); 605 __ leave(); 606 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 607 608 __ bind(no_deopt); 609 __ stop("deopt not performed"); 610 611 return oop_maps; 612 } 613 614 615 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { 616 617 const Register exception_oop = r0; 618 const Register exception_pc = r3; 619 620 // for better readability 621 const bool must_gc_arguments = true; 622 const bool dont_gc_arguments = false; 623 624 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu 625 bool save_fpu_registers = true; 626 627 // stub code & info for the different stubs 628 OopMapSet* oop_maps = nullptr; 629 OopMap* oop_map = nullptr; 630 switch (id) { 631 { 632 case forward_exception_id: 633 { 634 oop_maps = generate_handle_exception(id, sasm); 635 __ leave(); 636 __ ret(lr); 637 } 638 break; 639 640 case throw_div0_exception_id: 641 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments, does_not_return); 642 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); 643 } 644 break; 645 646 case throw_null_pointer_exception_id: 647 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments, does_not_return); 648 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); 649 } 650 break; 651 652 case new_instance_id: 653 case fast_new_instance_id: 654 case fast_new_instance_init_check_id: 655 { 656 Register klass = r3; // Incoming 657 Register obj = r0; // Result 658 659 if (id == new_instance_id) { 660 __ set_info("new_instance", dont_gc_arguments); 661 } else if (id == fast_new_instance_id) { 662 __ set_info("fast new_instance", dont_gc_arguments); 663 } else { 664 assert(id == fast_new_instance_init_check_id, "bad StubID"); 665 __ set_info("fast new_instance init check", dont_gc_arguments); 666 } 667 668 __ enter(); 669 OopMap* map = save_live_registers(sasm); 670 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass); 671 oop_maps = new OopMapSet(); 672 oop_maps->add_gc_map(call_offset, map); 673 restore_live_registers_except_r0(sasm); 674 __ verify_oop(obj); 675 __ leave(); 676 __ ret(lr); 677 678 // r0,: new instance 679 } 680 681 break; 682 683 case counter_overflow_id: 684 { 685 Register bci = r0, method = r1; 686 __ enter(); 687 OopMap* map = save_live_registers(sasm); 688 // Retrieve bci 689 __ ldrw(bci, Address(rfp, 2*BytesPerWord)); 690 // And a pointer to the Method* 691 __ ldr(method, Address(rfp, 3*BytesPerWord)); 692 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method); 693 oop_maps = new OopMapSet(); 694 oop_maps->add_gc_map(call_offset, map); 695 restore_live_registers(sasm); 696 __ leave(); 697 __ ret(lr); 698 } 699 break; 700 701 case new_type_array_id: 702 case new_object_array_id: 703 { 704 Register length = r19; // Incoming 705 Register klass = r3; // Incoming 706 Register obj = r0; // Result 707 708 if (id == new_type_array_id) { 709 __ set_info("new_type_array", dont_gc_arguments); 710 } else { 711 __ set_info("new_object_array", dont_gc_arguments); 712 } 713 714 #ifdef ASSERT 715 // assert object type is really an array of the proper kind 716 { 717 Label ok; 718 Register t0 = obj; 719 __ ldrw(t0, Address(klass, Klass::layout_helper_offset())); 720 __ asrw(t0, t0, Klass::_lh_array_tag_shift); 721 int tag = ((id == new_type_array_id) 722 ? Klass::_lh_array_tag_type_value 723 : Klass::_lh_array_tag_obj_value); 724 __ mov(rscratch1, tag); 725 __ cmpw(t0, rscratch1); 726 __ br(Assembler::EQ, ok); 727 __ stop("assert(is an array klass)"); 728 __ should_not_reach_here(); 729 __ bind(ok); 730 } 731 #endif // ASSERT 732 733 __ enter(); 734 OopMap* map = save_live_registers(sasm); 735 int call_offset; 736 if (id == new_type_array_id) { 737 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length); 738 } else { 739 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length); 740 } 741 742 oop_maps = new OopMapSet(); 743 oop_maps->add_gc_map(call_offset, map); 744 restore_live_registers_except_r0(sasm); 745 746 __ verify_oop(obj); 747 __ leave(); 748 __ ret(lr); 749 750 // r0: new array 751 } 752 break; 753 754 case new_multi_array_id: 755 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments); 756 // r0,: klass 757 // r19,: rank 758 // r2: address of 1st dimension 759 OopMap* map = save_live_registers(sasm); 760 __ mov(c_rarg1, r0); 761 __ mov(c_rarg3, r2); 762 __ mov(c_rarg2, r19); 763 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3); 764 765 oop_maps = new OopMapSet(); 766 oop_maps->add_gc_map(call_offset, map); 767 restore_live_registers_except_r0(sasm); 768 769 // r0,: new multi array 770 __ verify_oop(r0); 771 } 772 break; 773 774 case register_finalizer_id: 775 { 776 __ set_info("register_finalizer", dont_gc_arguments); 777 778 // This is called via call_runtime so the arguments 779 // will be place in C abi locations 780 781 __ verify_oop(c_rarg0); 782 783 // load the klass and check the has finalizer flag 784 Label register_finalizer; 785 Register t = r5; 786 __ load_klass(t, r0); 787 __ ldrw(t, Address(t, Klass::access_flags_offset())); 788 __ tbnz(t, exact_log2(JVM_ACC_HAS_FINALIZER), register_finalizer); 789 __ ret(lr); 790 791 __ bind(register_finalizer); 792 __ enter(); 793 OopMap* oop_map = save_live_registers(sasm); 794 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0); 795 oop_maps = new OopMapSet(); 796 oop_maps->add_gc_map(call_offset, oop_map); 797 798 // Now restore all the live registers 799 restore_live_registers(sasm); 800 801 __ leave(); 802 __ ret(lr); 803 } 804 break; 805 806 case throw_class_cast_exception_id: 807 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments, does_not_return); 808 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); 809 } 810 break; 811 812 case throw_incompatible_class_change_error_id: 813 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments, does_not_return); 814 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); 815 } 816 break; 817 818 case slow_subtype_check_id: 819 { 820 // Typical calling sequence: 821 // __ push(klass_RInfo); // object klass or other subclass 822 // __ push(sup_k_RInfo); // array element klass or other superclass 823 // __ bl(slow_subtype_check); 824 // Note that the subclass is pushed first, and is therefore deepest. 825 enum layout { 826 r0_off, r0_off_hi, 827 r2_off, r2_off_hi, 828 r4_off, r4_off_hi, 829 r5_off, r5_off_hi, 830 sup_k_off, sup_k_off_hi, 831 klass_off, klass_off_hi, 832 framesize, 833 result_off = sup_k_off 834 }; 835 836 __ set_info("slow_subtype_check", dont_gc_arguments); 837 __ push(RegSet::of(r0, r2, r4, r5), sp); 838 839 // This is called by pushing args and not with C abi 840 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass 841 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass 842 843 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); 844 845 Label miss; 846 __ check_klass_subtype_slow_path(r4, r0, r2, r5, nullptr, &miss); 847 848 // fallthrough on success: 849 __ mov(rscratch1, 1); 850 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 851 __ pop(RegSet::of(r0, r2, r4, r5), sp); 852 __ ret(lr); 853 854 __ bind(miss); 855 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 856 __ pop(RegSet::of(r0, r2, r4, r5), sp); 857 __ ret(lr); 858 } 859 break; 860 861 case monitorenter_nofpu_id: 862 save_fpu_registers = false; 863 // fall through 864 case monitorenter_id: 865 { 866 StubFrame f(sasm, "monitorenter", dont_gc_arguments); 867 OopMap* map = save_live_registers(sasm, save_fpu_registers); 868 869 // Called with store_parameter and not C abi 870 871 f.load_argument(1, r0); // r0,: object 872 f.load_argument(0, r1); // r1,: lock address 873 874 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1); 875 876 oop_maps = new OopMapSet(); 877 oop_maps->add_gc_map(call_offset, map); 878 restore_live_registers(sasm, save_fpu_registers); 879 } 880 break; 881 882 case monitorexit_nofpu_id: 883 save_fpu_registers = false; 884 // fall through 885 case monitorexit_id: 886 { 887 StubFrame f(sasm, "monitorexit", dont_gc_arguments); 888 OopMap* map = save_live_registers(sasm, save_fpu_registers); 889 890 // Called with store_parameter and not C abi 891 892 f.load_argument(0, r0); // r0,: lock address 893 894 // note: really a leaf routine but must setup last java sp 895 // => use call_RT for now (speed can be improved by 896 // doing last java sp setup manually) 897 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0); 898 899 oop_maps = new OopMapSet(); 900 oop_maps->add_gc_map(call_offset, map); 901 restore_live_registers(sasm, save_fpu_registers); 902 } 903 break; 904 905 case deoptimize_id: 906 { 907 StubFrame f(sasm, "deoptimize", dont_gc_arguments, does_not_return); 908 OopMap* oop_map = save_live_registers(sasm); 909 f.load_argument(0, c_rarg1); 910 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1); 911 912 oop_maps = new OopMapSet(); 913 oop_maps->add_gc_map(call_offset, oop_map); 914 restore_live_registers(sasm); 915 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 916 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 917 __ leave(); 918 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 919 } 920 break; 921 922 case throw_range_check_failed_id: 923 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments, does_not_return); 924 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); 925 } 926 break; 927 928 case unwind_exception_id: 929 { __ set_info("unwind_exception", dont_gc_arguments); 930 // note: no stubframe since we are about to leave the current 931 // activation and we are calling a leaf VM function only. 932 generate_unwind_exception(sasm); 933 } 934 break; 935 936 case access_field_patching_id: 937 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments, does_not_return); 938 // we should set up register map 939 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); 940 } 941 break; 942 943 case load_klass_patching_id: 944 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments, does_not_return); 945 // we should set up register map 946 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); 947 } 948 break; 949 950 case load_mirror_patching_id: 951 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments, does_not_return); 952 // we should set up register map 953 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); 954 } 955 break; 956 957 case load_appendix_patching_id: 958 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments, does_not_return); 959 // we should set up register map 960 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); 961 } 962 break; 963 964 case handle_exception_nofpu_id: 965 case handle_exception_id: 966 { StubFrame f(sasm, "handle_exception", dont_gc_arguments); 967 oop_maps = generate_handle_exception(id, sasm); 968 } 969 break; 970 971 case handle_exception_from_callee_id: 972 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments); 973 oop_maps = generate_handle_exception(id, sasm); 974 } 975 break; 976 977 case throw_index_exception_id: 978 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments, does_not_return); 979 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); 980 } 981 break; 982 983 case throw_array_store_exception_id: 984 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments, does_not_return); 985 // tos + 0: link 986 // + 1: return address 987 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); 988 } 989 break; 990 991 case predicate_failed_trap_id: 992 { 993 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments, does_not_return); 994 995 OopMap* map = save_live_registers(sasm); 996 997 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); 998 oop_maps = new OopMapSet(); 999 oop_maps->add_gc_map(call_offset, map); 1000 restore_live_registers(sasm); 1001 __ leave(); 1002 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 1003 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 1004 1005 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 1006 } 1007 break; 1008 1009 case dtrace_object_alloc_id: 1010 { // c_rarg0: object 1011 StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments); 1012 save_live_registers(sasm); 1013 1014 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), c_rarg0); 1015 1016 restore_live_registers(sasm); 1017 } 1018 break; 1019 1020 default: 1021 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments, does_not_return); 1022 __ mov(r0, (int)id); 1023 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0); 1024 } 1025 break; 1026 } 1027 } 1028 return oop_maps; 1029 } 1030 1031 #undef __ 1032 1033 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }