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 return generate_oop_map(sasm, save_fpu_registers); 292 } 293 294 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { 295 if (restore_fpu_registers) { 296 for (int i = 0; i < 32; i += 4) 297 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), 298 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); 299 } else { 300 __ add(sp, sp, 32 * wordSize); 301 } 302 303 __ pop(RegSet::range(r0, r29), sp); 304 } 305 306 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) { 307 308 if (restore_fpu_registers) { 309 for (int i = 0; i < 32; i += 4) 310 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), 311 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); 312 } else { 313 __ add(sp, sp, 32 * wordSize); 314 } 315 316 __ ldp(zr, r1, Address(__ post(sp, 16))); 317 __ pop(RegSet::range(r2, r29), sp); 318 } 319 320 321 322 void Runtime1::initialize_pd() { 323 int i; 324 int sp_offset = 0; 325 326 // all float registers are saved explicitly 327 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here"); 328 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 329 fpu_reg_save_offsets[i] = sp_offset; 330 sp_offset += 2; // SP offsets are in halfwords 331 } 332 333 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 334 Register r = as_Register(i); 335 cpu_reg_save_offsets[i] = sp_offset; 336 sp_offset += 2; // SP offsets are in halfwords 337 } 338 } 339 340 341 // target: the entry point of the method that creates and posts the exception oop 342 // has_argument: true if the exception needs arguments (passed in rscratch1 and rscratch2) 343 344 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { 345 // make a frame and preserve the caller's caller-save registers 346 OopMap* oop_map = save_live_registers(sasm); 347 int call_offset; 348 if (!has_argument) { 349 call_offset = __ call_RT(noreg, noreg, target); 350 } else { 351 __ mov(c_rarg1, rscratch1); 352 __ mov(c_rarg2, rscratch2); 353 call_offset = __ call_RT(noreg, noreg, target); 354 } 355 OopMapSet* oop_maps = new OopMapSet(); 356 oop_maps->add_gc_map(call_offset, oop_map); 357 return oop_maps; 358 } 359 360 361 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) { 362 __ block_comment("generate_handle_exception"); 363 364 // incoming parameters 365 const Register exception_oop = r0; 366 const Register exception_pc = r3; 367 // other registers used in this stub 368 369 // Save registers, if required. 370 OopMapSet* oop_maps = new OopMapSet(); 371 OopMap* oop_map = nullptr; 372 switch (id) { 373 case forward_exception_id: 374 // We're handling an exception in the context of a compiled frame. 375 // The registers have been saved in the standard places. Perform 376 // an exception lookup in the caller and dispatch to the handler 377 // if found. Otherwise unwind and dispatch to the callers 378 // exception handler. 379 oop_map = generate_oop_map(sasm, 1 /*thread*/); 380 381 // load and clear pending exception oop into r0 382 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset())); 383 __ str(zr, Address(rthread, Thread::pending_exception_offset())); 384 385 // load issuing PC (the return address for this stub) into r3 386 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord)); 387 __ authenticate_return_address(exception_pc, rscratch1); 388 389 // make sure that the vm_results are cleared (may be unnecessary) 390 __ str(zr, Address(rthread, JavaThread::vm_result_offset())); 391 __ str(zr, Address(rthread, JavaThread::vm_result_2_offset())); 392 break; 393 case handle_exception_nofpu_id: 394 case handle_exception_id: 395 // At this point all registers MAY be live. 396 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id); 397 break; 398 case handle_exception_from_callee_id: { 399 // At this point all registers except exception oop (r0) and 400 // exception pc (lr) are dead. 401 const int frame_size = 2 /*fp, return address*/; 402 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0); 403 sasm->set_frame_size(frame_size); 404 break; 405 } 406 default: ShouldNotReachHere(); 407 } 408 409 // verify that only r0 and r3 are valid at this time 410 __ invalidate_registers(false, true, true, false, true, true); 411 // verify that r0 contains a valid exception 412 __ verify_not_null_oop(exception_oop); 413 414 #ifdef ASSERT 415 // check that fields in JavaThread for exception oop and issuing pc are 416 // empty before writing to them 417 Label oop_empty; 418 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 419 __ cbz(rscratch1, oop_empty); 420 __ stop("exception oop already set"); 421 __ bind(oop_empty); 422 423 Label pc_empty; 424 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 425 __ cbz(rscratch1, pc_empty); 426 __ stop("exception pc already set"); 427 __ bind(pc_empty); 428 #endif 429 430 // save exception oop and issuing pc into JavaThread 431 // (exception handler will load it from here) 432 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset())); 433 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset())); 434 435 // patch throwing pc into return address (has bci & oop map) 436 __ protect_return_address(exception_pc, rscratch1); 437 __ str(exception_pc, Address(rfp, 1*BytesPerWord)); 438 439 // compute the exception handler. 440 // the exception oop and the throwing pc are read from the fields in JavaThread 441 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); 442 oop_maps->add_gc_map(call_offset, oop_map); 443 444 // r0: handler address 445 // will be the deopt blob if nmethod was deoptimized while we looked up 446 // handler regardless of whether handler existed in the nmethod. 447 448 // only r0 is valid at this time, all other registers have been destroyed by the runtime call 449 __ invalidate_registers(false, true, true, true, true, true); 450 451 // patch the return address, this stub will directly return to the exception handler 452 __ protect_return_address(r0, rscratch1); 453 __ str(r0, Address(rfp, 1*BytesPerWord)); 454 455 switch (id) { 456 case forward_exception_id: 457 case handle_exception_nofpu_id: 458 case handle_exception_id: 459 // Restore the registers that were saved at the beginning. 460 restore_live_registers(sasm, id != handle_exception_nofpu_id); 461 break; 462 case handle_exception_from_callee_id: 463 break; 464 default: ShouldNotReachHere(); 465 } 466 467 return oop_maps; 468 } 469 470 471 void Runtime1::generate_unwind_exception(StubAssembler *sasm) { 472 // incoming parameters 473 const Register exception_oop = r0; 474 // callee-saved copy of exception_oop during runtime call 475 const Register exception_oop_callee_saved = r19; 476 // other registers used in this stub 477 const Register exception_pc = r3; 478 const Register handler_addr = r1; 479 480 // verify that only r0, is valid at this time 481 __ invalidate_registers(false, true, true, true, true, true); 482 483 #ifdef ASSERT 484 // check that fields in JavaThread for exception oop and issuing pc are empty 485 Label oop_empty; 486 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 487 __ cbz(rscratch1, oop_empty); 488 __ stop("exception oop must be empty"); 489 __ bind(oop_empty); 490 491 Label pc_empty; 492 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 493 __ cbz(rscratch1, pc_empty); 494 __ stop("exception pc must be empty"); 495 __ bind(pc_empty); 496 #endif 497 498 // Save our return address because 499 // exception_handler_for_return_address will destroy it. We also 500 // save exception_oop 501 __ mov(r3, lr); 502 __ protect_return_address(); 503 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize))); 504 505 // search the exception handler address of the caller (using the return address) 506 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, r3); 507 // r0: exception handler address of the caller 508 509 // Only R0 is valid at this time; all other registers have been 510 // destroyed by the call. 511 __ invalidate_registers(false, true, true, true, false, true); 512 513 // move result of call into correct register 514 __ mov(handler_addr, r0); 515 516 // get throwing pc (= return address). 517 // lr has been destroyed by the call 518 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize))); 519 __ authenticate_return_address(); 520 __ mov(r3, lr); 521 522 __ verify_not_null_oop(exception_oop); 523 524 // continue at exception handler (return address removed) 525 // note: do *not* remove arguments when unwinding the 526 // activation since the caller assumes having 527 // all arguments on the stack when entering the 528 // runtime to determine the exception handler 529 // (GC happens at call site with arguments!) 530 // r0: exception oop 531 // r3: throwing pc 532 // r1: exception handler 533 __ br(handler_addr); 534 } 535 536 537 538 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { 539 // use the maximum number of runtime-arguments here because it is difficult to 540 // distinguish each RT-Call. 541 // Note: This number affects also the RT-Call in generate_handle_exception because 542 // the oop-map is shared for all calls. 543 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 544 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 545 546 OopMap* oop_map = save_live_registers(sasm); 547 548 __ mov(c_rarg0, rthread); 549 Label retaddr; 550 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1); 551 // do the call 552 __ lea(rscratch1, RuntimeAddress(target)); 553 __ blr(rscratch1); 554 __ bind(retaddr); 555 OopMapSet* oop_maps = new OopMapSet(); 556 oop_maps->add_gc_map(__ offset(), oop_map); 557 // verify callee-saved register 558 #ifdef ASSERT 559 { Label L; 560 __ get_thread(rscratch1); 561 __ cmp(rthread, rscratch1); 562 __ br(Assembler::EQ, L); 563 __ stop("StubAssembler::call_RT: rthread not callee saved?"); 564 __ bind(L); 565 } 566 #endif 567 568 __ reset_last_Java_frame(true); 569 570 #ifdef ASSERT 571 // check that fields in JavaThread for exception oop and issuing pc are empty 572 Label oop_empty; 573 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 574 __ cbz(rscratch1, oop_empty); 575 __ stop("exception oop must be empty"); 576 __ bind(oop_empty); 577 578 Label pc_empty; 579 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 580 __ cbz(rscratch1, pc_empty); 581 __ stop("exception pc must be empty"); 582 __ bind(pc_empty); 583 #endif 584 585 // Runtime will return true if the nmethod has been deoptimized, this is the 586 // expected scenario and anything else is an error. Note that we maintain a 587 // check on the result purely as a defensive measure. 588 Label no_deopt; 589 __ cbz(r0, no_deopt); // Have we deoptimized? 590 591 // Perform a re-execute. The proper return address is already on the stack, 592 // we just need to restore registers, pop all of our frame but the return 593 // address and jump to the deopt blob. 594 restore_live_registers(sasm); 595 __ leave(); 596 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 597 598 __ bind(no_deopt); 599 __ stop("deopt not performed"); 600 601 return oop_maps; 602 } 603 604 605 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { 606 607 const Register exception_oop = r0; 608 const Register exception_pc = r3; 609 610 // for better readability 611 const bool must_gc_arguments = true; 612 const bool dont_gc_arguments = false; 613 614 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu 615 bool save_fpu_registers = true; 616 617 // stub code & info for the different stubs 618 OopMapSet* oop_maps = nullptr; 619 OopMap* oop_map = nullptr; 620 switch (id) { 621 { 622 case forward_exception_id: 623 { 624 oop_maps = generate_handle_exception(id, sasm); 625 __ leave(); 626 __ ret(lr); 627 } 628 break; 629 630 case throw_div0_exception_id: 631 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments, does_not_return); 632 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); 633 } 634 break; 635 636 case throw_null_pointer_exception_id: 637 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments, does_not_return); 638 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); 639 } 640 break; 641 642 case new_instance_id: 643 case fast_new_instance_id: 644 case fast_new_instance_init_check_id: 645 { 646 Register klass = r3; // Incoming 647 Register obj = r0; // Result 648 649 if (id == new_instance_id) { 650 __ set_info("new_instance", dont_gc_arguments); 651 } else if (id == fast_new_instance_id) { 652 __ set_info("fast new_instance", dont_gc_arguments); 653 } else { 654 assert(id == fast_new_instance_init_check_id, "bad StubID"); 655 __ set_info("fast new_instance init check", dont_gc_arguments); 656 } 657 658 __ enter(); 659 OopMap* map = save_live_registers(sasm); 660 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass); 661 oop_maps = new OopMapSet(); 662 oop_maps->add_gc_map(call_offset, map); 663 restore_live_registers_except_r0(sasm); 664 __ verify_oop(obj); 665 __ leave(); 666 __ ret(lr); 667 668 // r0,: new instance 669 } 670 671 break; 672 673 case counter_overflow_id: 674 { 675 Register bci = r0, method = r1; 676 __ enter(); 677 OopMap* map = save_live_registers(sasm); 678 // Retrieve bci 679 __ ldrw(bci, Address(rfp, 2*BytesPerWord)); 680 // And a pointer to the Method* 681 __ ldr(method, Address(rfp, 3*BytesPerWord)); 682 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method); 683 oop_maps = new OopMapSet(); 684 oop_maps->add_gc_map(call_offset, map); 685 restore_live_registers(sasm); 686 __ leave(); 687 __ ret(lr); 688 } 689 break; 690 691 case new_type_array_id: 692 case new_object_array_id: 693 { 694 Register length = r19; // Incoming 695 Register klass = r3; // Incoming 696 Register obj = r0; // Result 697 698 if (id == new_type_array_id) { 699 __ set_info("new_type_array", dont_gc_arguments); 700 } else { 701 __ set_info("new_object_array", dont_gc_arguments); 702 } 703 704 #ifdef ASSERT 705 // assert object type is really an array of the proper kind 706 { 707 Label ok; 708 Register t0 = obj; 709 __ ldrw(t0, Address(klass, Klass::layout_helper_offset())); 710 __ asrw(t0, t0, Klass::_lh_array_tag_shift); 711 int tag = ((id == new_type_array_id) 712 ? Klass::_lh_array_tag_type_value 713 : Klass::_lh_array_tag_obj_value); 714 __ mov(rscratch1, tag); 715 __ cmpw(t0, rscratch1); 716 __ br(Assembler::EQ, ok); 717 __ stop("assert(is an array klass)"); 718 __ should_not_reach_here(); 719 __ bind(ok); 720 } 721 #endif // ASSERT 722 723 __ enter(); 724 OopMap* map = save_live_registers(sasm); 725 int call_offset; 726 if (id == new_type_array_id) { 727 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length); 728 } else { 729 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length); 730 } 731 732 oop_maps = new OopMapSet(); 733 oop_maps->add_gc_map(call_offset, map); 734 restore_live_registers_except_r0(sasm); 735 736 __ verify_oop(obj); 737 __ leave(); 738 __ ret(lr); 739 740 // r0: new array 741 } 742 break; 743 744 case new_multi_array_id: 745 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments); 746 // r0,: klass 747 // r19,: rank 748 // r2: address of 1st dimension 749 OopMap* map = save_live_registers(sasm); 750 __ mov(c_rarg1, r0); 751 __ mov(c_rarg3, r2); 752 __ mov(c_rarg2, r19); 753 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3); 754 755 oop_maps = new OopMapSet(); 756 oop_maps->add_gc_map(call_offset, map); 757 restore_live_registers_except_r0(sasm); 758 759 // r0,: new multi array 760 __ verify_oop(r0); 761 } 762 break; 763 764 case register_finalizer_id: 765 { 766 __ set_info("register_finalizer", dont_gc_arguments); 767 768 // This is called via call_runtime so the arguments 769 // will be place in C abi locations 770 771 __ verify_oop(c_rarg0); 772 773 // load the klass and check the has finalizer flag 774 Label register_finalizer; 775 Register t = r5; 776 __ load_klass(t, r0); 777 __ ldrw(t, Address(t, Klass::access_flags_offset())); 778 __ tbnz(t, exact_log2(JVM_ACC_HAS_FINALIZER), register_finalizer); 779 __ ret(lr); 780 781 __ bind(register_finalizer); 782 __ enter(); 783 OopMap* oop_map = save_live_registers(sasm); 784 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0); 785 oop_maps = new OopMapSet(); 786 oop_maps->add_gc_map(call_offset, oop_map); 787 788 // Now restore all the live registers 789 restore_live_registers(sasm); 790 791 __ leave(); 792 __ ret(lr); 793 } 794 break; 795 796 case throw_class_cast_exception_id: 797 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments, does_not_return); 798 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); 799 } 800 break; 801 802 case throw_incompatible_class_change_error_id: 803 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments, does_not_return); 804 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); 805 } 806 break; 807 808 case slow_subtype_check_id: 809 { 810 // Typical calling sequence: 811 // __ push(klass_RInfo); // object klass or other subclass 812 // __ push(sup_k_RInfo); // array element klass or other superclass 813 // __ bl(slow_subtype_check); 814 // Note that the subclass is pushed first, and is therefore deepest. 815 enum layout { 816 r0_off, r0_off_hi, 817 r2_off, r2_off_hi, 818 r4_off, r4_off_hi, 819 r5_off, r5_off_hi, 820 sup_k_off, sup_k_off_hi, 821 klass_off, klass_off_hi, 822 framesize, 823 result_off = sup_k_off 824 }; 825 826 __ set_info("slow_subtype_check", dont_gc_arguments); 827 __ push(RegSet::of(r0, r2, r4, r5), sp); 828 829 // This is called by pushing args and not with C abi 830 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass 831 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass 832 833 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); 834 835 Label miss; 836 __ check_klass_subtype_slow_path(r4, r0, r2, r5, nullptr, &miss); 837 838 // fallthrough on success: 839 __ mov(rscratch1, 1); 840 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 841 __ pop(RegSet::of(r0, r2, r4, r5), sp); 842 __ ret(lr); 843 844 __ bind(miss); 845 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 846 __ pop(RegSet::of(r0, r2, r4, r5), sp); 847 __ ret(lr); 848 } 849 break; 850 851 case monitorenter_nofpu_id: 852 save_fpu_registers = false; 853 // fall through 854 case monitorenter_id: 855 { 856 StubFrame f(sasm, "monitorenter", dont_gc_arguments); 857 OopMap* map = save_live_registers(sasm, save_fpu_registers); 858 859 // Called with store_parameter and not C abi 860 861 f.load_argument(1, r0); // r0,: object 862 f.load_argument(0, r1); // r1,: lock address 863 864 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1); 865 866 oop_maps = new OopMapSet(); 867 oop_maps->add_gc_map(call_offset, map); 868 restore_live_registers(sasm, save_fpu_registers); 869 } 870 break; 871 872 case monitorexit_nofpu_id: 873 save_fpu_registers = false; 874 // fall through 875 case monitorexit_id: 876 { 877 StubFrame f(sasm, "monitorexit", dont_gc_arguments); 878 OopMap* map = save_live_registers(sasm, save_fpu_registers); 879 880 // Called with store_parameter and not C abi 881 882 f.load_argument(0, r0); // r0,: lock address 883 884 // note: really a leaf routine but must setup last java sp 885 // => use call_RT for now (speed can be improved by 886 // doing last java sp setup manually) 887 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0); 888 889 oop_maps = new OopMapSet(); 890 oop_maps->add_gc_map(call_offset, map); 891 restore_live_registers(sasm, save_fpu_registers); 892 } 893 break; 894 895 case deoptimize_id: 896 { 897 StubFrame f(sasm, "deoptimize", dont_gc_arguments, does_not_return); 898 OopMap* oop_map = save_live_registers(sasm); 899 f.load_argument(0, c_rarg1); 900 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1); 901 902 oop_maps = new OopMapSet(); 903 oop_maps->add_gc_map(call_offset, oop_map); 904 restore_live_registers(sasm); 905 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 906 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 907 __ leave(); 908 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 909 } 910 break; 911 912 case throw_range_check_failed_id: 913 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments, does_not_return); 914 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); 915 } 916 break; 917 918 case unwind_exception_id: 919 { __ set_info("unwind_exception", dont_gc_arguments); 920 // note: no stubframe since we are about to leave the current 921 // activation and we are calling a leaf VM function only. 922 generate_unwind_exception(sasm); 923 } 924 break; 925 926 case access_field_patching_id: 927 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments, does_not_return); 928 // we should set up register map 929 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); 930 } 931 break; 932 933 case load_klass_patching_id: 934 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments, does_not_return); 935 // we should set up register map 936 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); 937 } 938 break; 939 940 case load_mirror_patching_id: 941 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments, does_not_return); 942 // we should set up register map 943 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); 944 } 945 break; 946 947 case load_appendix_patching_id: 948 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments, does_not_return); 949 // we should set up register map 950 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); 951 } 952 break; 953 954 case handle_exception_nofpu_id: 955 case handle_exception_id: 956 { StubFrame f(sasm, "handle_exception", dont_gc_arguments); 957 oop_maps = generate_handle_exception(id, sasm); 958 } 959 break; 960 961 case handle_exception_from_callee_id: 962 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments); 963 oop_maps = generate_handle_exception(id, sasm); 964 } 965 break; 966 967 case throw_index_exception_id: 968 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments, does_not_return); 969 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); 970 } 971 break; 972 973 case throw_array_store_exception_id: 974 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments, does_not_return); 975 // tos + 0: link 976 // + 1: return address 977 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); 978 } 979 break; 980 981 case predicate_failed_trap_id: 982 { 983 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments, does_not_return); 984 985 OopMap* map = save_live_registers(sasm); 986 987 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); 988 oop_maps = new OopMapSet(); 989 oop_maps->add_gc_map(call_offset, map); 990 restore_live_registers(sasm); 991 __ leave(); 992 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 993 assert(deopt_blob != nullptr, "deoptimization blob must have been created"); 994 995 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 996 } 997 break; 998 999 case dtrace_object_alloc_id: 1000 { // c_rarg0: object 1001 StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments); 1002 save_live_registers(sasm); 1003 1004 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), c_rarg0); 1005 1006 restore_live_registers(sasm); 1007 } 1008 break; 1009 1010 default: 1011 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments, does_not_return); 1012 __ mov(r0, (int)id); 1013 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0); 1014 } 1015 break; 1016 } 1017 } 1018 return oop_maps; 1019 } 1020 1021 #undef __ 1022 1023 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }