1 /* 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "c1/c1_Defs.hpp" 27 #include "c1/c1_MacroAssembler.hpp" 28 #include "c1/c1_Runtime1.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "nativeInst_sparc.hpp" 31 #include "oops/compiledICHolder.hpp" 32 #include "oops/oop.inline.hpp" 33 #include "prims/jvmtiExport.hpp" 34 #include "register_sparc.hpp" 35 #include "runtime/sharedRuntime.hpp" 36 #include "runtime/signature.hpp" 37 #include "runtime/vframeArray.hpp" 38 #include "utilities/macros.hpp" 39 #include "vmreg_sparc.inline.hpp" 40 41 // Implementation of StubAssembler 42 43 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) { 44 // for sparc changing the number of arguments doesn't change 45 // anything about the frame size so we'll always lie and claim that 46 // we are only passing 1 argument. 47 set_num_rt_args(1); 48 49 assert_not_delayed(); 50 // bang stack before going to runtime 51 set(-os::vm_page_size() + STACK_BIAS, G3_scratch); 52 st(G0, SP, G3_scratch); 53 54 // debugging support 55 assert(number_of_arguments >= 0 , "cannot have negative number of arguments"); 56 57 set_last_Java_frame(SP, noreg); 58 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early 59 save_thread(L7_thread_cache); 60 // do the call 61 call(entry_point, relocInfo::runtime_call_type); 62 if (!VerifyThread) { 63 delayed()->mov(G2_thread, O0); // pass thread as first argument 64 } else { 65 delayed()->nop(); // (thread already passed) 66 } 67 int call_offset = offset(); // offset of return address 68 restore_thread(L7_thread_cache); 69 reset_last_Java_frame(); 70 71 // check for pending exceptions 72 { Label L; 73 Address exception_addr(G2_thread, Thread::pending_exception_offset()); 74 ld_ptr(exception_addr, Gtemp); 75 br_null_short(Gtemp, pt, L); 76 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); 77 st_ptr(G0, vm_result_addr); 78 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset()); 79 st_ptr(G0, vm_result_addr_2); 80 81 if (frame_size() == no_frame_size) { 82 // we use O7 linkage so that forward_exception_entry has the issuing PC 83 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type); 84 delayed()->restore(); 85 } else if (_stub_id == Runtime1::forward_exception_id) { 86 should_not_reach_here(); 87 } else { 88 AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id)); 89 jump_to(exc, G4); 90 delayed()->nop(); 91 } 92 bind(L); 93 } 94 95 // get oop result if there is one and reset the value in the thread 96 if (oop_result1->is_valid()) { // get oop result if there is one and reset it in the thread 97 get_vm_result (oop_result1); 98 } else { 99 // be a little paranoid and clear the result 100 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset()); 101 st_ptr(G0, vm_result_addr); 102 } 103 104 // get second result if there is one and reset the value in the thread 105 if (metadata_result->is_valid()) { 106 get_vm_result_2 (metadata_result); 107 } else { 108 // be a little paranoid and clear the result 109 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset()); 110 st_ptr(G0, vm_result_addr_2); 111 } 112 113 return call_offset; 114 } 115 116 117 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { 118 // O0 is reserved for the thread 119 mov(arg1, O1); 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 // O0 is reserved for the thread 126 mov(arg1, O1); 127 mov(arg2, O2); assert(arg2 != O1, "smashed argument"); 128 return call_RT(oop_result1, metadata_result, entry, 2); 129 } 130 131 132 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { 133 // O0 is reserved for the thread 134 mov(arg1, O1); 135 mov(arg2, O2); assert(arg2 != O1, "smashed argument"); 136 mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument"); 137 return call_RT(oop_result1, metadata_result, entry, 3); 138 } 139 140 141 // Implementation of Runtime1 142 143 #define __ sasm-> 144 145 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; 146 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; 147 static int reg_save_size_in_words; 148 static int frame_size_in_bytes = -1; 149 150 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { 151 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words), 152 "mismatch in calculation"); 153 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 154 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); 155 OopMap* oop_map = new OopMap(frame_size_in_slots, 0); 156 157 int i; 158 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 159 Register r = as_Register(i); 160 if (r == G1 || r == G3 || r == G4 || r == G5) { 161 int sp_offset = cpu_reg_save_offsets[i]; 162 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 163 r->as_VMReg()); 164 } 165 } 166 167 if (save_fpu_registers) { 168 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 169 FloatRegister r = as_FloatRegister(i); 170 int sp_offset = fpu_reg_save_offsets[i]; 171 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 172 r->as_VMReg()); 173 } 174 } 175 return oop_map; 176 } 177 178 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) { 179 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words), 180 "mismatch in calculation"); 181 __ save_frame_c1(frame_size_in_bytes); 182 183 // Record volatile registers as callee-save values in an OopMap so their save locations will be 184 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for 185 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers 186 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame 187 // (as the stub's I's) when the runtime routine called by the stub creates its frame. 188 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint)) 189 190 int i; 191 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 192 Register r = as_Register(i); 193 if (r == G1 || r == G3 || r == G4 || r == G5) { 194 int sp_offset = cpu_reg_save_offsets[i]; 195 __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS); 196 } 197 } 198 199 if (save_fpu_registers) { 200 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 201 FloatRegister r = as_FloatRegister(i); 202 int sp_offset = fpu_reg_save_offsets[i]; 203 __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS); 204 } 205 } 206 207 return generate_oop_map(sasm, save_fpu_registers); 208 } 209 210 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { 211 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { 212 Register r = as_Register(i); 213 if (r == G1 || r == G3 || r == G4 || r == G5) { 214 __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r); 215 } 216 } 217 218 if (restore_fpu_registers) { 219 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { 220 FloatRegister r = as_FloatRegister(i); 221 __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r); 222 } 223 } 224 } 225 226 227 void Runtime1::initialize_pd() { 228 // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines 229 // 230 // A stub routine will have a frame that is at least large enough to hold 231 // a register window save area (obviously) and the volatile g registers 232 // and floating registers. A user of save_live_registers can have a frame 233 // that has more scratch area in it (although typically they will use L-regs). 234 // in that case the frame will look like this (stack growing down) 235 // 236 // FP -> | | 237 // | scratch mem | 238 // | " " | 239 // -------------- 240 // | float regs | 241 // | " " | 242 // --------------- 243 // | G regs | 244 // | " " | 245 // --------------- 246 // | abi reg. | 247 // | window save | 248 // | area | 249 // SP -> --------------- 250 // 251 int i; 252 int sp_offset = round_to(frame::register_save_words, 2); // start doubleword aligned 253 254 // only G int registers are saved explicitly; others are found in register windows 255 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 256 Register r = as_Register(i); 257 if (r == G1 || r == G3 || r == G4 || r == G5) { 258 cpu_reg_save_offsets[i] = sp_offset; 259 sp_offset++; 260 } 261 } 262 263 // all float registers are saved explicitly 264 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here"); 265 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 266 fpu_reg_save_offsets[i] = sp_offset; 267 sp_offset++; 268 } 269 reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset; 270 // this should match assembler::total_frame_size_in_bytes, which 271 // isn't callable from this context. It's checked by an assert when 272 // it's used though. 273 frame_size_in_bytes = align_size_up(sp_offset * wordSize, 8); 274 } 275 276 277 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { 278 // make a frame and preserve the caller's caller-save registers 279 OopMap* oop_map = save_live_registers(sasm); 280 int call_offset; 281 if (!has_argument) { 282 call_offset = __ call_RT(noreg, noreg, target); 283 } else { 284 call_offset = __ call_RT(noreg, noreg, target, G4); 285 } 286 OopMapSet* oop_maps = new OopMapSet(); 287 oop_maps->add_gc_map(call_offset, oop_map); 288 289 __ should_not_reach_here(); 290 return oop_maps; 291 } 292 293 294 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target, 295 Register arg1, Register arg2, Register arg3) { 296 // make a frame and preserve the caller's caller-save registers 297 OopMap* oop_map = save_live_registers(sasm); 298 299 int call_offset; 300 if (arg1 == noreg) { 301 call_offset = __ call_RT(result, noreg, target); 302 } else if (arg2 == noreg) { 303 call_offset = __ call_RT(result, noreg, target, arg1); 304 } else if (arg3 == noreg) { 305 call_offset = __ call_RT(result, noreg, target, arg1, arg2); 306 } else { 307 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3); 308 } 309 OopMapSet* oop_maps = NULL; 310 311 oop_maps = new OopMapSet(); 312 oop_maps->add_gc_map(call_offset, oop_map); 313 restore_live_registers(sasm); 314 315 __ ret(); 316 __ delayed()->restore(); 317 318 return oop_maps; 319 } 320 321 322 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { 323 // make a frame and preserve the caller's caller-save registers 324 OopMap* oop_map = save_live_registers(sasm); 325 326 // call the runtime patching routine, returns non-zero if nmethod got deopted. 327 int call_offset = __ call_RT(noreg, noreg, target); 328 OopMapSet* oop_maps = new OopMapSet(); 329 oop_maps->add_gc_map(call_offset, oop_map); 330 331 // re-execute the patched instruction or, if the nmethod was deoptmized, return to the 332 // deoptimization handler entry that will cause re-execution of the current bytecode 333 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 334 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 335 336 Label no_deopt; 337 __ br_null_short(O0, Assembler::pt, no_deopt); 338 339 // return to the deoptimization handler entry for unpacking and rexecute 340 // if we simply returned the we'd deopt as if any call we patched had just 341 // returned. 342 343 restore_live_registers(sasm); 344 345 AddressLiteral dest(deopt_blob->unpack_with_reexecution()); 346 __ jump_to(dest, O0); 347 __ delayed()->restore(); 348 349 __ bind(no_deopt); 350 restore_live_registers(sasm); 351 __ ret(); 352 __ delayed()->restore(); 353 354 return oop_maps; 355 } 356 357 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { 358 359 OopMapSet* oop_maps = NULL; 360 // for better readability 361 const bool must_gc_arguments = true; 362 const bool dont_gc_arguments = false; 363 364 // stub code & info for the different stubs 365 switch (id) { 366 case forward_exception_id: 367 { 368 oop_maps = generate_handle_exception(id, sasm); 369 } 370 break; 371 372 case new_instance_id: 373 case fast_new_instance_id: 374 case fast_new_instance_init_check_id: 375 { 376 Register G5_klass = G5; // Incoming 377 Register O0_obj = O0; // Outgoing 378 379 if (id == new_instance_id) { 380 __ set_info("new_instance", dont_gc_arguments); 381 } else if (id == fast_new_instance_id) { 382 __ set_info("fast new_instance", dont_gc_arguments); 383 } else { 384 assert(id == fast_new_instance_init_check_id, "bad StubID"); 385 __ set_info("fast new_instance init check", dont_gc_arguments); 386 } 387 388 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && 389 UseTLAB && FastTLABRefill) { 390 Label slow_path; 391 Register G1_obj_size = G1; 392 Register G3_t1 = G3; 393 Register G4_t2 = G4; 394 assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2); 395 396 // Push a frame since we may do dtrace notification for the 397 // allocation which requires calling out and we don't want 398 // to stomp the real return address. 399 __ save_frame(0); 400 401 if (id == fast_new_instance_init_check_id) { 402 // make sure the klass is initialized 403 __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1); 404 __ cmp_and_br_short(G3_t1, InstanceKlass::fully_initialized, Assembler::notEqual, Assembler::pn, slow_path); 405 } 406 #ifdef ASSERT 407 // assert object can be fast path allocated 408 { 409 Label ok, not_ok; 410 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size); 411 // make sure it's an instance (LH > 0) 412 __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok); 413 __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size); 414 __ br(Assembler::zero, false, Assembler::pn, ok); 415 __ delayed()->nop(); 416 __ bind(not_ok); 417 __ stop("assert(can be fast path allocated)"); 418 __ should_not_reach_here(); 419 __ bind(ok); 420 } 421 #endif // ASSERT 422 // if we got here then the TLAB allocation failed, so try 423 // refilling the TLAB or allocating directly from eden. 424 Label retry_tlab, try_eden; 425 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G5_klass 426 427 __ bind(retry_tlab); 428 429 // get the instance size 430 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size); 431 432 __ tlab_allocate(O0_obj, G1_obj_size, 0, G3_t1, slow_path); 433 434 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2); 435 __ verify_oop(O0_obj); 436 __ mov(O0, I0); 437 __ ret(); 438 __ delayed()->restore(); 439 440 __ bind(try_eden); 441 // get the instance size 442 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size); 443 __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path); 444 __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2); 445 446 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2); 447 __ verify_oop(O0_obj); 448 __ mov(O0, I0); 449 __ ret(); 450 __ delayed()->restore(); 451 452 __ bind(slow_path); 453 454 // pop this frame so generate_stub_call can push it's own 455 __ restore(); 456 } 457 458 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass); 459 // I0->O0: new instance 460 } 461 462 break; 463 464 case counter_overflow_id: 465 // G4 contains bci, G5 contains method 466 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5); 467 break; 468 469 case new_type_array_id: 470 case new_object_array_id: 471 { 472 Register G5_klass = G5; // Incoming 473 Register G4_length = G4; // Incoming 474 Register O0_obj = O0; // Outgoing 475 476 Address klass_lh(G5_klass, Klass::layout_helper_offset()); 477 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise"); 478 assert(Klass::_lh_header_size_mask == 0xFF, "bytewise"); 479 // Use this offset to pick out an individual byte of the layout_helper: 480 const int klass_lh_header_size_offset = ((BytesPerInt - 1) // 3 - 2 selects byte {0,1,0,0} 481 - Klass::_lh_header_size_shift / BitsPerByte); 482 483 if (id == new_type_array_id) { 484 __ set_info("new_type_array", dont_gc_arguments); 485 } else { 486 __ set_info("new_object_array", dont_gc_arguments); 487 } 488 489 #ifdef ASSERT 490 // assert object type is really an array of the proper kind 491 { 492 Label ok; 493 Register G3_t1 = G3; 494 __ ld(klass_lh, G3_t1); 495 __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1); 496 int tag = ((id == new_type_array_id) 497 ? Klass::_lh_array_tag_type_value 498 : Klass::_lh_array_tag_obj_value); 499 __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok); 500 __ stop("assert(is an array klass)"); 501 __ should_not_reach_here(); 502 __ bind(ok); 503 } 504 #endif // ASSERT 505 506 if (UseTLAB && FastTLABRefill) { 507 Label slow_path; 508 Register G1_arr_size = G1; 509 Register G3_t1 = G3; 510 Register O1_t2 = O1; 511 assert_different_registers(G5_klass, G4_length, G1_arr_size, G3_t1, O1_t2); 512 513 // check that array length is small enough for fast path 514 __ set(C1_MacroAssembler::max_array_allocation_length, G3_t1); 515 __ cmp_and_br_short(G4_length, G3_t1, Assembler::greaterUnsigned, Assembler::pn, slow_path); 516 517 // if we got here then the TLAB allocation failed, so try 518 // refilling the TLAB or allocating directly from eden. 519 Label retry_tlab, try_eden; 520 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G4_length and G5_klass 521 522 __ bind(retry_tlab); 523 524 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size 525 __ ld(klass_lh, G3_t1); 526 __ sll(G4_length, G3_t1, G1_arr_size); 527 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1); 528 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1); 529 __ add(G1_arr_size, G3_t1, G1_arr_size); 530 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size); // align up 531 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size); 532 533 __ tlab_allocate(O0_obj, G1_arr_size, 0, G3_t1, slow_path); // preserves G1_arr_size 534 535 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2); 536 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset); 537 __ sub(G1_arr_size, G3_t1, O1_t2); // body length 538 __ add(O0_obj, G3_t1, G3_t1); // body start 539 __ initialize_body(G3_t1, O1_t2); 540 __ verify_oop(O0_obj); 541 __ retl(); 542 __ delayed()->nop(); 543 544 __ bind(try_eden); 545 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size 546 __ ld(klass_lh, G3_t1); 547 __ sll(G4_length, G3_t1, G1_arr_size); 548 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1); 549 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1); 550 __ add(G1_arr_size, G3_t1, G1_arr_size); 551 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size); 552 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size); 553 554 __ eden_allocate(O0_obj, G1_arr_size, 0, G3_t1, O1_t2, slow_path); // preserves G1_arr_size 555 __ incr_allocated_bytes(G1_arr_size, G3_t1, O1_t2); 556 557 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2); 558 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset); 559 __ sub(G1_arr_size, G3_t1, O1_t2); // body length 560 __ add(O0_obj, G3_t1, G3_t1); // body start 561 __ initialize_body(G3_t1, O1_t2); 562 __ verify_oop(O0_obj); 563 __ retl(); 564 __ delayed()->nop(); 565 566 __ bind(slow_path); 567 } 568 569 if (id == new_type_array_id) { 570 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length); 571 } else { 572 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length); 573 } 574 // I0 -> O0: new array 575 } 576 break; 577 578 case new_multi_array_id: 579 { // O0: klass 580 // O1: rank 581 // O2: address of 1st dimension 582 __ set_info("new_multi_array", dont_gc_arguments); 583 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2); 584 // I0 -> O0: new multi array 585 } 586 break; 587 588 case register_finalizer_id: 589 { 590 __ set_info("register_finalizer", dont_gc_arguments); 591 592 // load the klass and check the has finalizer flag 593 Label register_finalizer; 594 Register t = O1; 595 __ load_klass(O0, t); 596 __ ld(t, in_bytes(Klass::access_flags_offset()), t); 597 __ set(JVM_ACC_HAS_FINALIZER, G3); 598 __ andcc(G3, t, G0); 599 __ br(Assembler::notZero, false, Assembler::pt, register_finalizer); 600 __ delayed()->nop(); 601 602 // do a leaf return 603 __ retl(); 604 __ delayed()->nop(); 605 606 __ bind(register_finalizer); 607 OopMap* oop_map = save_live_registers(sasm); 608 int call_offset = __ call_RT(noreg, noreg, 609 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0); 610 oop_maps = new OopMapSet(); 611 oop_maps->add_gc_map(call_offset, oop_map); 612 613 // Now restore all the live registers 614 restore_live_registers(sasm); 615 616 __ ret(); 617 __ delayed()->restore(); 618 } 619 break; 620 621 case throw_range_check_failed_id: 622 { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded 623 // G4: index 624 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); 625 } 626 break; 627 628 case throw_index_exception_id: 629 { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded 630 // G4: index 631 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); 632 } 633 break; 634 635 case throw_div0_exception_id: 636 { __ set_info("throw_div0_exception", dont_gc_arguments); 637 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); 638 } 639 break; 640 641 case throw_null_pointer_exception_id: 642 { __ set_info("throw_null_pointer_exception", dont_gc_arguments); 643 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); 644 } 645 break; 646 647 case handle_exception_id: 648 { __ set_info("handle_exception", dont_gc_arguments); 649 oop_maps = generate_handle_exception(id, sasm); 650 } 651 break; 652 653 case handle_exception_from_callee_id: 654 { __ set_info("handle_exception_from_callee", dont_gc_arguments); 655 oop_maps = generate_handle_exception(id, sasm); 656 } 657 break; 658 659 case unwind_exception_id: 660 { 661 // O0: exception 662 // I7: address of call to this method 663 664 __ set_info("unwind_exception", dont_gc_arguments); 665 __ mov(Oexception, Oexception->after_save()); 666 __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save()); 667 668 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), 669 G2_thread, Oissuing_pc->after_save()); 670 __ verify_not_null_oop(Oexception->after_save()); 671 672 // Restore SP from L7 if the exception PC is a method handle call site. 673 __ mov(O0, G5); // Save the target address. 674 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0); 675 __ tst(L0); // Condition codes are preserved over the restore. 676 __ restore(); 677 678 __ jmp(G5, 0); 679 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required. 680 } 681 break; 682 683 case throw_array_store_exception_id: 684 { 685 __ set_info("throw_array_store_exception", dont_gc_arguments); 686 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); 687 } 688 break; 689 690 case throw_class_cast_exception_id: 691 { 692 // G4: object 693 __ set_info("throw_class_cast_exception", dont_gc_arguments); 694 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); 695 } 696 break; 697 698 case throw_incompatible_class_change_error_id: 699 { 700 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments); 701 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); 702 } 703 break; 704 705 case slow_subtype_check_id: 706 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super ); 707 // Arguments : 708 // 709 // ret : G3 710 // sub : G3, argument, destroyed 711 // super: G1, argument, not changed 712 // raddr: O7, blown by call 713 Label miss; 714 715 __ save_frame(0); // Blow no registers! 716 717 __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss); 718 719 __ mov(1, G3); 720 __ ret(); // Result in G5 is 'true' 721 __ delayed()->restore(); // free copy or add can go here 722 723 __ bind(miss); 724 __ mov(0, G3); 725 __ ret(); // Result in G5 is 'false' 726 __ delayed()->restore(); // free copy or add can go here 727 } 728 729 case monitorenter_nofpu_id: 730 case monitorenter_id: 731 { // G4: object 732 // G5: lock address 733 __ set_info("monitorenter", dont_gc_arguments); 734 735 int save_fpu_registers = (id == monitorenter_id); 736 // make a frame and preserve the caller's caller-save registers 737 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); 738 739 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5); 740 741 oop_maps = new OopMapSet(); 742 oop_maps->add_gc_map(call_offset, oop_map); 743 restore_live_registers(sasm, save_fpu_registers); 744 745 __ ret(); 746 __ delayed()->restore(); 747 } 748 break; 749 750 case monitorexit_nofpu_id: 751 case monitorexit_id: 752 { // G4: lock address 753 // note: really a leaf routine but must setup last java sp 754 // => use call_RT for now (speed can be improved by 755 // doing last java sp setup manually) 756 __ set_info("monitorexit", dont_gc_arguments); 757 758 int save_fpu_registers = (id == monitorexit_id); 759 // make a frame and preserve the caller's caller-save registers 760 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers); 761 762 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4); 763 764 oop_maps = new OopMapSet(); 765 oop_maps->add_gc_map(call_offset, oop_map); 766 restore_live_registers(sasm, save_fpu_registers); 767 768 __ ret(); 769 __ delayed()->restore(); 770 } 771 break; 772 773 case deoptimize_id: 774 { 775 __ set_info("deoptimize", dont_gc_arguments); 776 OopMap* oop_map = save_live_registers(sasm); 777 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize)); 778 oop_maps = new OopMapSet(); 779 oop_maps->add_gc_map(call_offset, oop_map); 780 restore_live_registers(sasm); 781 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 782 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 783 AddressLiteral dest(deopt_blob->unpack_with_reexecution()); 784 __ jump_to(dest, O0); 785 __ delayed()->restore(); 786 } 787 break; 788 789 case access_field_patching_id: 790 { __ set_info("access_field_patching", dont_gc_arguments); 791 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); 792 } 793 break; 794 795 case load_klass_patching_id: 796 { __ set_info("load_klass_patching", dont_gc_arguments); 797 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); 798 } 799 break; 800 801 case load_mirror_patching_id: 802 { __ set_info("load_mirror_patching", dont_gc_arguments); 803 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); 804 } 805 break; 806 807 case load_appendix_patching_id: 808 { __ set_info("load_appendix_patching", dont_gc_arguments); 809 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); 810 } 811 break; 812 813 case dtrace_object_alloc_id: 814 { // O0: object 815 __ set_info("dtrace_object_alloc", dont_gc_arguments); 816 // we can't gc here so skip the oopmap but make sure that all 817 // the live registers get saved. 818 save_live_registers(sasm); 819 820 __ save_thread(L7_thread_cache); 821 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), 822 relocInfo::runtime_call_type); 823 __ delayed()->mov(I0, O0); 824 __ restore_thread(L7_thread_cache); 825 826 restore_live_registers(sasm); 827 __ ret(); 828 __ delayed()->restore(); 829 } 830 break; 831 832 #if INCLUDE_ALL_GCS 833 case g1_pre_barrier_slow_id: 834 { // G4: previous value of memory 835 BarrierSet* bs = Universe::heap()->barrier_set(); 836 if (bs->kind() != BarrierSet::G1SATBCTLogging) { 837 __ save_frame(0); 838 __ set((int)id, O1); 839 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0); 840 __ should_not_reach_here(); 841 break; 842 } 843 844 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments); 845 846 Register pre_val = G4; 847 Register tmp = G1_scratch; 848 Register tmp2 = G3_scratch; 849 850 Label refill, restart; 851 bool with_frame = false; // I don't know if we can do with-frame. 852 int satb_q_index_byte_offset = 853 in_bytes(JavaThread::satb_mark_queue_offset() + 854 PtrQueue::byte_offset_of_index()); 855 int satb_q_buf_byte_offset = 856 in_bytes(JavaThread::satb_mark_queue_offset() + 857 PtrQueue::byte_offset_of_buf()); 858 859 __ bind(restart); 860 // Load the index into the SATB buffer. PtrQueue::_index is a 861 // size_t so ld_ptr is appropriate 862 __ ld_ptr(G2_thread, satb_q_index_byte_offset, tmp); 863 864 // index == 0? 865 __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pn, refill); 866 867 __ ld_ptr(G2_thread, satb_q_buf_byte_offset, tmp2); 868 __ sub(tmp, oopSize, tmp); 869 870 __ st_ptr(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card> 871 // Use return-from-leaf 872 __ retl(); 873 __ delayed()->st_ptr(tmp, G2_thread, satb_q_index_byte_offset); 874 875 __ bind(refill); 876 __ save_frame(0); 877 878 __ mov(pre_val, L0); 879 __ mov(tmp, L1); 880 __ mov(tmp2, L2); 881 882 __ call_VM_leaf(L7_thread_cache, 883 CAST_FROM_FN_PTR(address, 884 SATBMarkQueueSet::handle_zero_index_for_thread), 885 G2_thread); 886 887 __ mov(L0, pre_val); 888 __ mov(L1, tmp); 889 __ mov(L2, tmp2); 890 891 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart); 892 __ delayed()->restore(); 893 } 894 break; 895 896 case g1_post_barrier_slow_id: 897 { 898 BarrierSet* bs = Universe::heap()->barrier_set(); 899 if (bs->kind() != BarrierSet::G1SATBCTLogging) { 900 __ save_frame(0); 901 __ set((int)id, O1); 902 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0); 903 __ should_not_reach_here(); 904 break; 905 } 906 907 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments); 908 909 Register addr = G4; 910 Register cardtable = G5; 911 Register tmp = G1_scratch; 912 Register tmp2 = G3_scratch; 913 jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base; 914 915 Label not_already_dirty, restart, refill; 916 917 #ifdef _LP64 918 __ srlx(addr, CardTableModRefBS::card_shift, addr); 919 #else 920 __ srl(addr, CardTableModRefBS::card_shift, addr); 921 #endif 922 923 AddressLiteral rs(byte_map_base); 924 __ set(rs, cardtable); // cardtable := <card table base> 925 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable] 926 927 assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code"); 928 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty); 929 930 // We didn't take the branch, so we're already dirty: return. 931 // Use return-from-leaf 932 __ retl(); 933 __ delayed()->nop(); 934 935 // Not dirty. 936 __ bind(not_already_dirty); 937 938 // Get cardtable + tmp into a reg by itself 939 __ add(addr, cardtable, tmp2); 940 941 // First, dirty it. 942 __ stb(G0, tmp2, 0); // [cardPtr] := 0 (i.e., dirty). 943 944 Register tmp3 = cardtable; 945 Register tmp4 = tmp; 946 947 // these registers are now dead 948 addr = cardtable = tmp = noreg; 949 950 int dirty_card_q_index_byte_offset = 951 in_bytes(JavaThread::dirty_card_queue_offset() + 952 PtrQueue::byte_offset_of_index()); 953 int dirty_card_q_buf_byte_offset = 954 in_bytes(JavaThread::dirty_card_queue_offset() + 955 PtrQueue::byte_offset_of_buf()); 956 957 __ bind(restart); 958 959 // Get the index into the update buffer. PtrQueue::_index is 960 // a size_t so ld_ptr is appropriate here. 961 __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, tmp3); 962 963 // index == 0? 964 __ cmp_and_brx_short(tmp3, G0, Assembler::equal, Assembler::pn, refill); 965 966 __ ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, tmp4); 967 __ sub(tmp3, oopSize, tmp3); 968 969 __ st_ptr(tmp2, tmp4, tmp3); // [_buf + index] := <address_of_card> 970 // Use return-from-leaf 971 __ retl(); 972 __ delayed()->st_ptr(tmp3, G2_thread, dirty_card_q_index_byte_offset); 973 974 __ bind(refill); 975 __ save_frame(0); 976 977 __ mov(tmp2, L0); 978 __ mov(tmp3, L1); 979 __ mov(tmp4, L2); 980 981 __ call_VM_leaf(L7_thread_cache, 982 CAST_FROM_FN_PTR(address, 983 DirtyCardQueueSet::handle_zero_index_for_thread), 984 G2_thread); 985 986 __ mov(L0, tmp2); 987 __ mov(L1, tmp3); 988 __ mov(L2, tmp4); 989 990 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart); 991 __ delayed()->restore(); 992 } 993 break; 994 #endif // INCLUDE_ALL_GCS 995 996 case predicate_failed_trap_id: 997 { 998 __ set_info("predicate_failed_trap", dont_gc_arguments); 999 OopMap* oop_map = save_live_registers(sasm); 1000 1001 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); 1002 1003 oop_maps = new OopMapSet(); 1004 oop_maps->add_gc_map(call_offset, oop_map); 1005 1006 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 1007 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 1008 restore_live_registers(sasm); 1009 1010 AddressLiteral dest(deopt_blob->unpack_with_reexecution()); 1011 __ jump_to(dest, O0); 1012 __ delayed()->restore(); 1013 } 1014 break; 1015 1016 default: 1017 { __ set_info("unimplemented entry", dont_gc_arguments); 1018 __ save_frame(0); 1019 __ set((int)id, O1); 1020 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1); 1021 __ should_not_reach_here(); 1022 } 1023 break; 1024 } 1025 return oop_maps; 1026 } 1027 1028 1029 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) { 1030 __ block_comment("generate_handle_exception"); 1031 1032 // Save registers, if required. 1033 OopMapSet* oop_maps = new OopMapSet(); 1034 OopMap* oop_map = NULL; 1035 switch (id) { 1036 case forward_exception_id: 1037 // We're handling an exception in the context of a compiled frame. 1038 // The registers have been saved in the standard places. Perform 1039 // an exception lookup in the caller and dispatch to the handler 1040 // if found. Otherwise unwind and dispatch to the callers 1041 // exception handler. 1042 oop_map = generate_oop_map(sasm, true); 1043 1044 // transfer the pending exception to the exception_oop 1045 __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception); 1046 __ ld_ptr(Oexception, 0, G0); 1047 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset())); 1048 __ add(I7, frame::pc_return_offset, Oissuing_pc); 1049 break; 1050 case handle_exception_id: 1051 // At this point all registers MAY be live. 1052 oop_map = save_live_registers(sasm); 1053 __ mov(Oexception->after_save(), Oexception); 1054 __ mov(Oissuing_pc->after_save(), Oissuing_pc); 1055 break; 1056 case handle_exception_from_callee_id: 1057 // At this point all registers except exception oop (Oexception) 1058 // and exception pc (Oissuing_pc) are dead. 1059 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0); 1060 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 1061 __ save_frame_c1(frame_size_in_bytes); 1062 __ mov(Oexception->after_save(), Oexception); 1063 __ mov(Oissuing_pc->after_save(), Oissuing_pc); 1064 break; 1065 default: ShouldNotReachHere(); 1066 } 1067 1068 __ verify_not_null_oop(Oexception); 1069 1070 // save the exception and issuing pc in the thread 1071 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset())); 1072 __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset())); 1073 1074 // use the throwing pc as the return address to lookup (has bci & oop map) 1075 __ mov(Oissuing_pc, I7); 1076 __ sub(I7, frame::pc_return_offset, I7); 1077 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); 1078 oop_maps->add_gc_map(call_offset, oop_map); 1079 1080 // Note: if nmethod has been deoptimized then regardless of 1081 // whether it had a handler or not we will deoptimize 1082 // by entering the deopt blob with a pending exception. 1083 1084 // Restore the registers that were saved at the beginning, remove 1085 // the frame and jump to the exception handler. 1086 switch (id) { 1087 case forward_exception_id: 1088 case handle_exception_id: 1089 restore_live_registers(sasm); 1090 __ jmp(O0, 0); 1091 __ delayed()->restore(); 1092 break; 1093 case handle_exception_from_callee_id: 1094 // Restore SP from L7 if the exception PC is a method handle call site. 1095 __ mov(O0, G5); // Save the target address. 1096 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0); 1097 __ tst(L0); // Condition codes are preserved over the restore. 1098 __ restore(); 1099 1100 __ jmp(G5, 0); // jump to the exception handler 1101 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required. 1102 break; 1103 default: ShouldNotReachHere(); 1104 } 1105 1106 return oop_maps; 1107 } 1108 1109 1110 #undef __ 1111 1112 const char *Runtime1::pd_name_for_address(address entry) { 1113 return "<unknown function>"; 1114 }