1 /* 2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2018 SAP SE. 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 27 #include "precompiled.hpp" 28 #include "asm/macroAssembler.inline.hpp" 29 #include "gc/shared/barrierSet.hpp" 30 #include "gc/shared/barrierSetAssembler.hpp" 31 #include "interp_masm_ppc.hpp" 32 #include "interpreter/interpreterRuntime.hpp" 33 #include "prims/jvmtiThreadState.hpp" 34 #include "runtime/frame.inline.hpp" 35 #include "runtime/safepointMechanism.hpp" 36 #include "runtime/sharedRuntime.hpp" 37 38 // Implementation of InterpreterMacroAssembler. 39 40 // This file specializes the assembler with interpreter-specific macros. 41 42 #ifdef PRODUCT 43 #define BLOCK_COMMENT(str) // nothing 44 #else 45 #define BLOCK_COMMENT(str) block_comment(str) 46 #endif 47 48 void InterpreterMacroAssembler::null_check_throw(Register a, int offset, Register temp_reg) { 49 address exception_entry = Interpreter::throw_NullPointerException_entry(); 50 MacroAssembler::null_check_throw(a, offset, temp_reg, exception_entry); 51 } 52 53 void InterpreterMacroAssembler::jump_to_entry(address entry, Register Rscratch) { 54 assert(entry, "Entry must have been generated by now"); 55 if (is_within_range_of_b(entry, pc())) { 56 b(entry); 57 } else { 58 load_const_optimized(Rscratch, entry, R0); 59 mtctr(Rscratch); 60 bctr(); 61 } 62 } 63 64 void InterpreterMacroAssembler::dispatch_next(TosState state, int bcp_incr, bool generate_poll) { 65 Register bytecode = R12_scratch2; 66 if (bcp_incr != 0) { 67 lbzu(bytecode, bcp_incr, R14_bcp); 68 } else { 69 lbz(bytecode, 0, R14_bcp); 70 } 71 72 dispatch_Lbyte_code(state, bytecode, Interpreter::dispatch_table(state), generate_poll); 73 } 74 75 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { 76 // Load current bytecode. 77 Register bytecode = R12_scratch2; 78 lbz(bytecode, 0, R14_bcp); 79 dispatch_Lbyte_code(state, bytecode, table); 80 } 81 82 // Dispatch code executed in the prolog of a bytecode which does not do it's 83 // own dispatch. The dispatch address is computed and placed in R24_dispatch_addr. 84 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int bcp_incr) { 85 Register bytecode = R12_scratch2; 86 lbz(bytecode, bcp_incr, R14_bcp); 87 88 load_dispatch_table(R24_dispatch_addr, Interpreter::dispatch_table(state)); 89 90 sldi(bytecode, bytecode, LogBytesPerWord); 91 ldx(R24_dispatch_addr, R24_dispatch_addr, bytecode); 92 } 93 94 // Dispatch code executed in the epilog of a bytecode which does not do it's 95 // own dispatch. The dispatch address in R24_dispatch_addr is used for the 96 // dispatch. 97 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int bcp_incr) { 98 if (bcp_incr) { addi(R14_bcp, R14_bcp, bcp_incr); } 99 mtctr(R24_dispatch_addr); 100 bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable); 101 } 102 103 void InterpreterMacroAssembler::check_and_handle_popframe(Register scratch_reg) { 104 assert(scratch_reg != R0, "can't use R0 as scratch_reg here"); 105 if (JvmtiExport::can_pop_frame()) { 106 Label L; 107 108 // Check the "pending popframe condition" flag in the current thread. 109 lwz(scratch_reg, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); 110 111 // Initiate popframe handling only if it is not already being 112 // processed. If the flag has the popframe_processing bit set, it 113 // means that this code is called *during* popframe handling - we 114 // don't want to reenter. 115 andi_(R0, scratch_reg, JavaThread::popframe_pending_bit); 116 beq(CCR0, L); 117 118 andi_(R0, scratch_reg, JavaThread::popframe_processing_bit); 119 bne(CCR0, L); 120 121 // Call the Interpreter::remove_activation_preserving_args_entry() 122 // func to get the address of the same-named entrypoint in the 123 // generated interpreter code. 124 #if defined(ABI_ELFv2) 125 call_c(CAST_FROM_FN_PTR(address, 126 Interpreter::remove_activation_preserving_args_entry), 127 relocInfo::none); 128 #else 129 call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, 130 Interpreter::remove_activation_preserving_args_entry), 131 relocInfo::none); 132 #endif 133 134 // Jump to Interpreter::_remove_activation_preserving_args_entry. 135 mtctr(R3_RET); 136 bctr(); 137 138 align(32, 12); 139 bind(L); 140 } 141 } 142 143 void InterpreterMacroAssembler::check_and_handle_earlyret(Register scratch_reg) { 144 const Register Rthr_state_addr = scratch_reg; 145 if (JvmtiExport::can_force_early_return()) { 146 Label Lno_early_ret; 147 ld(Rthr_state_addr, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread); 148 cmpdi(CCR0, Rthr_state_addr, 0); 149 beq(CCR0, Lno_early_ret); 150 151 lwz(R0, in_bytes(JvmtiThreadState::earlyret_state_offset()), Rthr_state_addr); 152 cmpwi(CCR0, R0, JvmtiThreadState::earlyret_pending); 153 bne(CCR0, Lno_early_ret); 154 155 // Jump to Interpreter::_earlyret_entry. 156 lwz(R3_ARG1, in_bytes(JvmtiThreadState::earlyret_tos_offset()), Rthr_state_addr); 157 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry)); 158 mtlr(R3_RET); 159 blr(); 160 161 align(32, 12); 162 bind(Lno_early_ret); 163 } 164 } 165 166 void InterpreterMacroAssembler::load_earlyret_value(TosState state, Register Rscratch1) { 167 const Register RjvmtiState = Rscratch1; 168 const Register Rscratch2 = R0; 169 170 ld(RjvmtiState, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread); 171 li(Rscratch2, 0); 172 173 switch (state) { 174 case atos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState); 175 std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState); 176 break; 177 case ltos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); 178 break; 179 case btos: // fall through 180 case ztos: // fall through 181 case ctos: // fall through 182 case stos: // fall through 183 case itos: lwz(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); 184 break; 185 case ftos: lfs(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); 186 break; 187 case dtos: lfd(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); 188 break; 189 case vtos: break; 190 default : ShouldNotReachHere(); 191 } 192 193 // Clean up tos value in the jvmti thread state. 194 std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); 195 // Set tos state field to illegal value. 196 li(Rscratch2, ilgl); 197 stw(Rscratch2, in_bytes(JvmtiThreadState::earlyret_tos_offset()), RjvmtiState); 198 } 199 200 // Common code to dispatch and dispatch_only. 201 // Dispatch value in Lbyte_code and increment Lbcp. 202 203 void InterpreterMacroAssembler::load_dispatch_table(Register dst, address* table) { 204 address table_base = (address)Interpreter::dispatch_table((TosState)0); 205 intptr_t table_offs = (intptr_t)table - (intptr_t)table_base; 206 if (is_simm16(table_offs)) { 207 addi(dst, R25_templateTableBase, (int)table_offs); 208 } else { 209 load_const_optimized(dst, table, R0); 210 } 211 } 212 213 void InterpreterMacroAssembler::dispatch_Lbyte_code(TosState state, Register bytecode, 214 address* table, bool generate_poll) { 215 assert_different_registers(bytecode, R11_scratch1); 216 217 // Calc dispatch table address. 218 load_dispatch_table(R11_scratch1, table); 219 220 if (SafepointMechanism::uses_thread_local_poll() && generate_poll) { 221 address *sfpt_tbl = Interpreter::safept_table(state); 222 if (table != sfpt_tbl) { 223 Label dispatch; 224 ld(R0, in_bytes(Thread::polling_page_offset()), R16_thread); 225 // Armed page has poll_bit set, if poll bit is cleared just continue. 226 andi_(R0, R0, SafepointMechanism::poll_bit()); 227 beq(CCR0, dispatch); 228 load_dispatch_table(R11_scratch1, sfpt_tbl); 229 align(32, 16); 230 bind(dispatch); 231 } 232 } 233 234 sldi(R12_scratch2, bytecode, LogBytesPerWord); 235 ldx(R11_scratch1, R11_scratch1, R12_scratch2); 236 237 // Jump off! 238 mtctr(R11_scratch1); 239 bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable); 240 } 241 242 void InterpreterMacroAssembler::load_receiver(Register Rparam_count, Register Rrecv_dst) { 243 sldi(Rrecv_dst, Rparam_count, Interpreter::logStackElementSize); 244 ldx(Rrecv_dst, Rrecv_dst, R15_esp); 245 } 246 247 // helpers for expression stack 248 249 void InterpreterMacroAssembler::pop_i(Register r) { 250 lwzu(r, Interpreter::stackElementSize, R15_esp); 251 } 252 253 void InterpreterMacroAssembler::pop_ptr(Register r) { 254 ldu(r, Interpreter::stackElementSize, R15_esp); 255 } 256 257 void InterpreterMacroAssembler::pop_l(Register r) { 258 ld(r, Interpreter::stackElementSize, R15_esp); 259 addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize); 260 } 261 262 void InterpreterMacroAssembler::pop_f(FloatRegister f) { 263 lfsu(f, Interpreter::stackElementSize, R15_esp); 264 } 265 266 void InterpreterMacroAssembler::pop_d(FloatRegister f) { 267 lfd(f, Interpreter::stackElementSize, R15_esp); 268 addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize); 269 } 270 271 void InterpreterMacroAssembler::push_i(Register r) { 272 stw(r, 0, R15_esp); 273 addi(R15_esp, R15_esp, - Interpreter::stackElementSize ); 274 } 275 276 void InterpreterMacroAssembler::push_ptr(Register r) { 277 std(r, 0, R15_esp); 278 addi(R15_esp, R15_esp, - Interpreter::stackElementSize ); 279 } 280 281 void InterpreterMacroAssembler::push_l(Register r) { 282 // Clear unused slot. 283 load_const_optimized(R0, 0L); 284 std(R0, 0, R15_esp); 285 std(r, - Interpreter::stackElementSize, R15_esp); 286 addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize ); 287 } 288 289 void InterpreterMacroAssembler::push_f(FloatRegister f) { 290 stfs(f, 0, R15_esp); 291 addi(R15_esp, R15_esp, - Interpreter::stackElementSize ); 292 } 293 294 void InterpreterMacroAssembler::push_d(FloatRegister f) { 295 stfd(f, - Interpreter::stackElementSize, R15_esp); 296 addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize ); 297 } 298 299 void InterpreterMacroAssembler::push_2ptrs(Register first, Register second) { 300 std(first, 0, R15_esp); 301 std(second, -Interpreter::stackElementSize, R15_esp); 302 addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize ); 303 } 304 305 void InterpreterMacroAssembler::move_l_to_d(Register l, FloatRegister d) { 306 if (VM_Version::has_mtfprd()) { 307 mtfprd(d, l); 308 } else { 309 std(l, 0, R15_esp); 310 lfd(d, 0, R15_esp); 311 } 312 } 313 314 void InterpreterMacroAssembler::move_d_to_l(FloatRegister d, Register l) { 315 if (VM_Version::has_mtfprd()) { 316 mffprd(l, d); 317 } else { 318 stfd(d, 0, R15_esp); 319 ld(l, 0, R15_esp); 320 } 321 } 322 323 void InterpreterMacroAssembler::push(TosState state) { 324 switch (state) { 325 case atos: push_ptr(); break; 326 case btos: 327 case ztos: 328 case ctos: 329 case stos: 330 case itos: push_i(); break; 331 case ltos: push_l(); break; 332 case ftos: push_f(); break; 333 case dtos: push_d(); break; 334 case vtos: /* nothing to do */ break; 335 default : ShouldNotReachHere(); 336 } 337 } 338 339 void InterpreterMacroAssembler::pop(TosState state) { 340 switch (state) { 341 case atos: pop_ptr(); break; 342 case btos: 343 case ztos: 344 case ctos: 345 case stos: 346 case itos: pop_i(); break; 347 case ltos: pop_l(); break; 348 case ftos: pop_f(); break; 349 case dtos: pop_d(); break; 350 case vtos: /* nothing to do */ break; 351 default : ShouldNotReachHere(); 352 } 353 verify_oop(R17_tos, state); 354 } 355 356 void InterpreterMacroAssembler::empty_expression_stack() { 357 addi(R15_esp, R26_monitor, - Interpreter::stackElementSize); 358 } 359 360 void InterpreterMacroAssembler::get_2_byte_integer_at_bcp(int bcp_offset, 361 Register Rdst, 362 signedOrNot is_signed) { 363 #if defined(VM_LITTLE_ENDIAN) 364 if (bcp_offset) { 365 load_const_optimized(Rdst, bcp_offset); 366 lhbrx(Rdst, R14_bcp, Rdst); 367 } else { 368 lhbrx(Rdst, R14_bcp); 369 } 370 if (is_signed == Signed) { 371 extsh(Rdst, Rdst); 372 } 373 #else 374 // Read Java big endian format. 375 if (is_signed == Signed) { 376 lha(Rdst, bcp_offset, R14_bcp); 377 } else { 378 lhz(Rdst, bcp_offset, R14_bcp); 379 } 380 #endif 381 } 382 383 void InterpreterMacroAssembler::get_4_byte_integer_at_bcp(int bcp_offset, 384 Register Rdst, 385 signedOrNot is_signed) { 386 #if defined(VM_LITTLE_ENDIAN) 387 if (bcp_offset) { 388 load_const_optimized(Rdst, bcp_offset); 389 lwbrx(Rdst, R14_bcp, Rdst); 390 } else { 391 lwbrx(Rdst, R14_bcp); 392 } 393 if (is_signed == Signed) { 394 extsw(Rdst, Rdst); 395 } 396 #else 397 // Read Java big endian format. 398 if (bcp_offset & 3) { // Offset unaligned? 399 load_const_optimized(Rdst, bcp_offset); 400 if (is_signed == Signed) { 401 lwax(Rdst, R14_bcp, Rdst); 402 } else { 403 lwzx(Rdst, R14_bcp, Rdst); 404 } 405 } else { 406 if (is_signed == Signed) { 407 lwa(Rdst, bcp_offset, R14_bcp); 408 } else { 409 lwz(Rdst, bcp_offset, R14_bcp); 410 } 411 } 412 #endif 413 } 414 415 416 // Load the constant pool cache index from the bytecode stream. 417 // 418 // Kills / writes: 419 // - Rdst, Rscratch 420 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register Rdst, int bcp_offset, 421 size_t index_size) { 422 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); 423 // Cache index is always in the native format, courtesy of Rewriter. 424 if (index_size == sizeof(u2)) { 425 lhz(Rdst, bcp_offset, R14_bcp); 426 } else if (index_size == sizeof(u4)) { 427 if (bcp_offset & 3) { 428 load_const_optimized(Rdst, bcp_offset); 429 lwax(Rdst, R14_bcp, Rdst); 430 } else { 431 lwa(Rdst, bcp_offset, R14_bcp); 432 } 433 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); 434 nand(Rdst, Rdst, Rdst); // convert to plain index 435 } else if (index_size == sizeof(u1)) { 436 lbz(Rdst, bcp_offset, R14_bcp); 437 } else { 438 ShouldNotReachHere(); 439 } 440 // Rdst now contains cp cache index. 441 } 442 443 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, int bcp_offset, 444 size_t index_size) { 445 get_cache_index_at_bcp(cache, bcp_offset, index_size); 446 sldi(cache, cache, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord)); 447 add(cache, R27_constPoolCache, cache); 448 } 449 450 // Load 4-byte signed or unsigned integer in Java format (that is, big-endian format) 451 // from (Rsrc)+offset. 452 void InterpreterMacroAssembler::get_u4(Register Rdst, Register Rsrc, int offset, 453 signedOrNot is_signed) { 454 #if defined(VM_LITTLE_ENDIAN) 455 if (offset) { 456 load_const_optimized(Rdst, offset); 457 lwbrx(Rdst, Rdst, Rsrc); 458 } else { 459 lwbrx(Rdst, Rsrc); 460 } 461 if (is_signed == Signed) { 462 extsw(Rdst, Rdst); 463 } 464 #else 465 if (is_signed == Signed) { 466 lwa(Rdst, offset, Rsrc); 467 } else { 468 lwz(Rdst, offset, Rsrc); 469 } 470 #endif 471 } 472 473 // Load object from cpool->resolved_references(index). 474 void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result, Register index, Label *L_handle_null) { 475 assert_different_registers(result, index); 476 get_constant_pool(result); 477 478 // Convert from field index to resolved_references() index and from 479 // word index to byte offset. Since this is a java object, it can be compressed. 480 Register tmp = index; // reuse 481 sldi(tmp, index, LogBytesPerHeapOop); 482 // Load pointer for resolved_references[] objArray. 483 ld(result, ConstantPool::cache_offset_in_bytes(), result); 484 ld(result, ConstantPoolCache::resolved_references_offset_in_bytes(), result); 485 resolve_oop_handle(result); 486 #ifdef ASSERT 487 Label index_ok; 488 lwa(R0, arrayOopDesc::length_offset_in_bytes(), result); 489 sldi(R0, R0, LogBytesPerHeapOop); 490 cmpd(CCR0, tmp, R0); 491 blt(CCR0, index_ok); 492 stop("resolved reference index out of bounds", 0x09256); 493 bind(index_ok); 494 #endif 495 // Add in the index. 496 add(result, tmp, result); 497 load_heap_oop(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT), result, tmp, R0, false, 0, L_handle_null); 498 } 499 500 // load cpool->resolved_klass_at(index) 501 void InterpreterMacroAssembler::load_resolved_klass_at_offset(Register Rcpool, Register Roffset, Register Rklass) { 502 // int value = *(Rcpool->int_at_addr(which)); 503 // int resolved_klass_index = extract_low_short_from_int(value); 504 add(Roffset, Rcpool, Roffset); 505 #if defined(VM_LITTLE_ENDIAN) 506 lhz(Roffset, sizeof(ConstantPool), Roffset); // Roffset = resolved_klass_index 507 #else 508 lhz(Roffset, sizeof(ConstantPool) + 2, Roffset); // Roffset = resolved_klass_index 509 #endif 510 511 ld(Rklass, ConstantPool::resolved_klasses_offset_in_bytes(), Rcpool); // Rklass = Rcpool->_resolved_klasses 512 513 sldi(Roffset, Roffset, LogBytesPerWord); 514 addi(Roffset, Roffset, Array<Klass*>::base_offset_in_bytes()); 515 isync(); // Order load of instance Klass wrt. tags. 516 ldx(Rklass, Rklass, Roffset); 517 } 518 519 void InterpreterMacroAssembler::load_resolved_method_at_index(int byte_no, 520 Register cache, 521 Register method) { 522 const int method_offset = in_bytes( 523 ConstantPoolCache::base_offset() + 524 ((byte_no == TemplateTable::f2_byte) 525 ? ConstantPoolCacheEntry::f2_offset() 526 : ConstantPoolCacheEntry::f1_offset())); 527 528 ld(method, method_offset, cache); // get f1 Method* 529 } 530 531 // Generate a subtype check: branch to ok_is_subtype if sub_klass is 532 // a subtype of super_klass. Blows registers Rsub_klass, tmp1, tmp2. 533 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, Register Rsuper_klass, Register Rtmp1, 534 Register Rtmp2, Register Rtmp3, Label &ok_is_subtype) { 535 // Profile the not-null value's klass. 536 profile_typecheck(Rsub_klass, Rtmp1, Rtmp2); 537 check_klass_subtype(Rsub_klass, Rsuper_klass, Rtmp1, Rtmp2, ok_is_subtype); 538 profile_typecheck_failed(Rtmp1, Rtmp2); 539 } 540 541 // Separate these two to allow for delay slot in middle. 542 // These are used to do a test and full jump to exception-throwing code. 543 544 // Check that index is in range for array, then shift index by index_shift, 545 // and put arrayOop + shifted_index into res. 546 // Note: res is still shy of address by array offset into object. 547 548 void InterpreterMacroAssembler::index_check_without_pop(Register Rarray, Register Rindex, 549 int index_shift, Register Rtmp, Register Rres) { 550 // Check that index is in range for array, then shift index by index_shift, 551 // and put arrayOop + shifted_index into res. 552 // Note: res is still shy of address by array offset into object. 553 // Kills: 554 // - Rindex 555 // Writes: 556 // - Rres: Address that corresponds to the array index if check was successful. 557 verify_oop(Rarray); 558 const Register Rlength = R0; 559 const Register RsxtIndex = Rtmp; 560 Label LisNull, LnotOOR; 561 562 // Array nullcheck 563 if (!ImplicitNullChecks) { 564 cmpdi(CCR0, Rarray, 0); 565 beq(CCR0, LisNull); 566 } else { 567 null_check_throw(Rarray, arrayOopDesc::length_offset_in_bytes(), /*temp*/RsxtIndex); 568 } 569 570 // Rindex might contain garbage in upper bits (remember that we don't sign extend 571 // during integer arithmetic operations). So kill them and put value into same register 572 // where ArrayIndexOutOfBounds would expect the index in. 573 rldicl(RsxtIndex, Rindex, 0, 32); // zero extend 32 bit -> 64 bit 574 575 // Index check 576 lwz(Rlength, arrayOopDesc::length_offset_in_bytes(), Rarray); 577 cmplw(CCR0, Rindex, Rlength); 578 sldi(RsxtIndex, RsxtIndex, index_shift); 579 blt(CCR0, LnotOOR); 580 // Index should be in R17_tos, array should be in R4_ARG2. 581 mr_if_needed(R17_tos, Rindex); 582 mr_if_needed(R4_ARG2, Rarray); 583 load_dispatch_table(Rtmp, (address*)Interpreter::_throw_ArrayIndexOutOfBoundsException_entry); 584 mtctr(Rtmp); 585 bctr(); 586 587 if (!ImplicitNullChecks) { 588 bind(LisNull); 589 load_dispatch_table(Rtmp, (address*)Interpreter::_throw_NullPointerException_entry); 590 mtctr(Rtmp); 591 bctr(); 592 } 593 594 align(32, 16); 595 bind(LnotOOR); 596 597 // Calc address 598 add(Rres, RsxtIndex, Rarray); 599 } 600 601 void InterpreterMacroAssembler::index_check(Register array, Register index, 602 int index_shift, Register tmp, Register res) { 603 // pop array 604 pop_ptr(array); 605 606 // check array 607 index_check_without_pop(array, index, index_shift, tmp, res); 608 } 609 610 void InterpreterMacroAssembler::get_const(Register Rdst) { 611 ld(Rdst, in_bytes(Method::const_offset()), R19_method); 612 } 613 614 void InterpreterMacroAssembler::get_constant_pool(Register Rdst) { 615 get_const(Rdst); 616 ld(Rdst, in_bytes(ConstMethod::constants_offset()), Rdst); 617 } 618 619 void InterpreterMacroAssembler::get_constant_pool_cache(Register Rdst) { 620 get_constant_pool(Rdst); 621 ld(Rdst, ConstantPool::cache_offset_in_bytes(), Rdst); 622 } 623 624 void InterpreterMacroAssembler::get_cpool_and_tags(Register Rcpool, Register Rtags) { 625 get_constant_pool(Rcpool); 626 ld(Rtags, ConstantPool::tags_offset_in_bytes(), Rcpool); 627 } 628 629 // Unlock if synchronized method. 630 // 631 // Unlock the receiver if this is a synchronized method. 632 // Unlock any Java monitors from synchronized blocks. 633 // 634 // If there are locked Java monitors 635 // If throw_monitor_exception 636 // throws IllegalMonitorStateException 637 // Else if install_monitor_exception 638 // installs IllegalMonitorStateException 639 // Else 640 // no error processing 641 void InterpreterMacroAssembler::unlock_if_synchronized_method(TosState state, 642 bool throw_monitor_exception, 643 bool install_monitor_exception) { 644 Label Lunlocked, Lno_unlock; 645 { 646 Register Rdo_not_unlock_flag = R11_scratch1; 647 Register Raccess_flags = R12_scratch2; 648 649 // Check if synchronized method or unlocking prevented by 650 // JavaThread::do_not_unlock_if_synchronized flag. 651 lbz(Rdo_not_unlock_flag, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); 652 lwz(Raccess_flags, in_bytes(Method::access_flags_offset()), R19_method); 653 li(R0, 0); 654 stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); // reset flag 655 656 push(state); 657 658 // Skip if we don't have to unlock. 659 rldicl_(R0, Raccess_flags, 64-JVM_ACC_SYNCHRONIZED_BIT, 63); // Extract bit and compare to 0. 660 beq(CCR0, Lunlocked); 661 662 cmpwi(CCR0, Rdo_not_unlock_flag, 0); 663 bne(CCR0, Lno_unlock); 664 } 665 666 // Unlock 667 { 668 Register Rmonitor_base = R11_scratch1; 669 670 Label Lunlock; 671 // If it's still locked, everything is ok, unlock it. 672 ld(Rmonitor_base, 0, R1_SP); 673 addi(Rmonitor_base, Rmonitor_base, 674 -(frame::ijava_state_size + frame::interpreter_frame_monitor_size_in_bytes())); // Monitor base 675 676 ld(R0, BasicObjectLock::obj_offset_in_bytes(), Rmonitor_base); 677 cmpdi(CCR0, R0, 0); 678 bne(CCR0, Lunlock); 679 680 // If it's already unlocked, throw exception. 681 if (throw_monitor_exception) { 682 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); 683 should_not_reach_here(); 684 } else { 685 if (install_monitor_exception) { 686 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); 687 b(Lunlocked); 688 } 689 } 690 691 bind(Lunlock); 692 unlock_object(Rmonitor_base); 693 } 694 695 // Check that all other monitors are unlocked. Throw IllegelMonitorState exception if not. 696 bind(Lunlocked); 697 { 698 Label Lexception, Lrestart; 699 Register Rcurrent_obj_addr = R11_scratch1; 700 const int delta = frame::interpreter_frame_monitor_size_in_bytes(); 701 assert((delta & LongAlignmentMask) == 0, "sizeof BasicObjectLock must be even number of doublewords"); 702 703 bind(Lrestart); 704 // Set up search loop: Calc num of iterations. 705 { 706 Register Riterations = R12_scratch2; 707 Register Rmonitor_base = Rcurrent_obj_addr; 708 ld(Rmonitor_base, 0, R1_SP); 709 addi(Rmonitor_base, Rmonitor_base, - frame::ijava_state_size); // Monitor base 710 711 subf_(Riterations, R26_monitor, Rmonitor_base); 712 ble(CCR0, Lno_unlock); 713 714 addi(Rcurrent_obj_addr, Rmonitor_base, 715 BasicObjectLock::obj_offset_in_bytes() - frame::interpreter_frame_monitor_size_in_bytes()); 716 // Check if any monitor is on stack, bail out if not 717 srdi(Riterations, Riterations, exact_log2(delta)); 718 mtctr(Riterations); 719 } 720 721 // The search loop: Look for locked monitors. 722 { 723 const Register Rcurrent_obj = R0; 724 Label Lloop; 725 726 ld(Rcurrent_obj, 0, Rcurrent_obj_addr); 727 addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta); 728 bind(Lloop); 729 730 // Check if current entry is used. 731 cmpdi(CCR0, Rcurrent_obj, 0); 732 bne(CCR0, Lexception); 733 // Preload next iteration's compare value. 734 ld(Rcurrent_obj, 0, Rcurrent_obj_addr); 735 addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta); 736 bdnz(Lloop); 737 } 738 // Fell through: Everything's unlocked => finish. 739 b(Lno_unlock); 740 741 // An object is still locked => need to throw exception. 742 bind(Lexception); 743 if (throw_monitor_exception) { 744 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); 745 should_not_reach_here(); 746 } else { 747 // Stack unrolling. Unlock object and if requested, install illegal_monitor_exception. 748 // Unlock does not block, so don't have to worry about the frame. 749 Register Rmonitor_addr = R11_scratch1; 750 addi(Rmonitor_addr, Rcurrent_obj_addr, -BasicObjectLock::obj_offset_in_bytes() + delta); 751 unlock_object(Rmonitor_addr); 752 if (install_monitor_exception) { 753 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); 754 } 755 b(Lrestart); 756 } 757 } 758 759 align(32, 12); 760 bind(Lno_unlock); 761 pop(state); 762 } 763 764 // Support function for remove_activation & Co. 765 void InterpreterMacroAssembler::merge_frames(Register Rsender_sp, Register return_pc, 766 Register Rscratch1, Register Rscratch2) { 767 // Pop interpreter frame. 768 ld(Rscratch1, 0, R1_SP); // *SP 769 ld(Rsender_sp, _ijava_state_neg(sender_sp), Rscratch1); // top_frame_sp 770 ld(Rscratch2, 0, Rscratch1); // **SP 771 if (return_pc!=noreg) { 772 ld(return_pc, _abi(lr), Rscratch1); // LR 773 } 774 775 // Merge top frames. 776 subf(Rscratch1, R1_SP, Rsender_sp); // top_frame_sp - SP 777 stdux(Rscratch2, R1_SP, Rscratch1); // atomically set *(SP = top_frame_sp) = **SP 778 } 779 780 void InterpreterMacroAssembler::narrow(Register result) { 781 Register ret_type = R11_scratch1; 782 ld(R11_scratch1, in_bytes(Method::const_offset()), R19_method); 783 lbz(ret_type, in_bytes(ConstMethod::result_type_offset()), R11_scratch1); 784 785 Label notBool, notByte, notChar, done; 786 787 // common case first 788 cmpwi(CCR0, ret_type, T_INT); 789 beq(CCR0, done); 790 791 cmpwi(CCR0, ret_type, T_BOOLEAN); 792 bne(CCR0, notBool); 793 andi(result, result, 0x1); 794 b(done); 795 796 bind(notBool); 797 cmpwi(CCR0, ret_type, T_BYTE); 798 bne(CCR0, notByte); 799 extsb(result, result); 800 b(done); 801 802 bind(notByte); 803 cmpwi(CCR0, ret_type, T_CHAR); 804 bne(CCR0, notChar); 805 andi(result, result, 0xffff); 806 b(done); 807 808 bind(notChar); 809 // cmpwi(CCR0, ret_type, T_SHORT); // all that's left 810 // bne(CCR0, done); 811 extsh(result, result); 812 813 // Nothing to do for T_INT 814 bind(done); 815 } 816 817 // Remove activation. 818 // 819 // Unlock the receiver if this is a synchronized method. 820 // Unlock any Java monitors from synchronized blocks. 821 // Remove the activation from the stack. 822 // 823 // If there are locked Java monitors 824 // If throw_monitor_exception 825 // throws IllegalMonitorStateException 826 // Else if install_monitor_exception 827 // installs IllegalMonitorStateException 828 // Else 829 // no error processing 830 void InterpreterMacroAssembler::remove_activation(TosState state, 831 bool throw_monitor_exception, 832 bool install_monitor_exception) { 833 BLOCK_COMMENT("remove_activation {"); 834 unlock_if_synchronized_method(state, throw_monitor_exception, install_monitor_exception); 835 836 // Save result (push state before jvmti call and pop it afterwards) and notify jvmti. 837 notify_method_exit(false, state, NotifyJVMTI, true); 838 839 BLOCK_COMMENT("reserved_stack_check:"); 840 if (StackReservedPages > 0) { 841 // Test if reserved zone needs to be enabled. 842 Label no_reserved_zone_enabling; 843 844 // Compare frame pointers. There is no good stack pointer, as with stack 845 // frame compression we can get different SPs when we do calls. A subsequent 846 // call could have a smaller SP, so that this compare succeeds for an 847 // inner call of the method annotated with ReservedStack. 848 ld_ptr(R0, JavaThread::reserved_stack_activation_offset(), R16_thread); 849 ld_ptr(R11_scratch1, _abi(callers_sp), R1_SP); // Load frame pointer. 850 cmpld(CCR0, R11_scratch1, R0); 851 blt_predict_taken(CCR0, no_reserved_zone_enabling); 852 853 // Enable reserved zone again, throw stack overflow exception. 854 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), R16_thread); 855 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_delayed_StackOverflowError)); 856 857 should_not_reach_here(); 858 859 bind(no_reserved_zone_enabling); 860 } 861 862 verify_oop(R17_tos, state); 863 verify_thread(); 864 865 merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2); 866 mtlr(R0); 867 BLOCK_COMMENT("} remove_activation"); 868 } 869 870 // Lock object 871 // 872 // Registers alive 873 // monitor - Address of the BasicObjectLock to be used for locking, 874 // which must be initialized with the object to lock. 875 // object - Address of the object to be locked. 876 // 877 void InterpreterMacroAssembler::lock_object(Register monitor, Register object) { 878 if (UseHeavyMonitors) { 879 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 880 monitor, /*check_for_exceptions=*/true); 881 } else { 882 // template code: 883 // 884 // markWord displaced_header = obj->mark().set_unlocked(); 885 // monitor->lock()->set_displaced_header(displaced_header); 886 // if (Atomic::cmpxchg(/*addr*/obj->mark_addr(), /*cmp*/displaced_header, /*ex=*/monitor) == displaced_header) { 887 // // We stored the monitor address into the object's mark word. 888 // } else if (THREAD->is_lock_owned((address)displaced_header)) 889 // // Simple recursive case. 890 // monitor->lock()->set_displaced_header(NULL); 891 // } else { 892 // // Slow path. 893 // InterpreterRuntime::monitorenter(THREAD, monitor); 894 // } 895 896 const Register displaced_header = R7_ARG5; 897 const Register object_mark_addr = R8_ARG6; 898 const Register current_header = R9_ARG7; 899 const Register tmp = R10_ARG8; 900 901 Label done; 902 Label cas_failed, slow_case; 903 904 assert_different_registers(displaced_header, object_mark_addr, current_header, tmp); 905 906 // markWord displaced_header = obj->mark().set_unlocked(); 907 908 // Load markWord from object into displaced_header. 909 ld(displaced_header, oopDesc::mark_offset_in_bytes(), object); 910 911 if (UseBiasedLocking) { 912 biased_locking_enter(CCR0, object, displaced_header, tmp, current_header, done, &slow_case); 913 } 914 915 // Set displaced_header to be (markWord of object | UNLOCK_VALUE). 916 ori(displaced_header, displaced_header, markWord::unlocked_value); 917 918 // monitor->lock()->set_displaced_header(displaced_header); 919 920 // Initialize the box (Must happen before we update the object mark!). 921 std(displaced_header, BasicObjectLock::lock_offset_in_bytes() + 922 BasicLock::displaced_header_offset_in_bytes(), monitor); 923 924 // if (Atomic::cmpxchg(/*addr*/obj->mark_addr(), /*cmp*/displaced_header, /*ex=*/monitor) == displaced_header) { 925 926 // Store stack address of the BasicObjectLock (this is monitor) into object. 927 addi(object_mark_addr, object, oopDesc::mark_offset_in_bytes()); 928 929 // Must fence, otherwise, preceding store(s) may float below cmpxchg. 930 // CmpxchgX sets CCR0 to cmpX(current, displaced). 931 cmpxchgd(/*flag=*/CCR0, 932 /*current_value=*/current_header, 933 /*compare_value=*/displaced_header, /*exchange_value=*/monitor, 934 /*where=*/object_mark_addr, 935 MacroAssembler::MemBarRel | MacroAssembler::MemBarAcq, 936 MacroAssembler::cmpxchgx_hint_acquire_lock(), 937 noreg, 938 &cas_failed, 939 /*check without membar and ldarx first*/true); 940 941 // If the compare-and-exchange succeeded, then we found an unlocked 942 // object and we have now locked it. 943 b(done); 944 bind(cas_failed); 945 946 // } else if (THREAD->is_lock_owned((address)displaced_header)) 947 // // Simple recursive case. 948 // monitor->lock()->set_displaced_header(NULL); 949 950 // We did not see an unlocked object so try the fast recursive case. 951 952 // Check if owner is self by comparing the value in the markWord of object 953 // (current_header) with the stack pointer. 954 sub(current_header, current_header, R1_SP); 955 956 assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); 957 load_const_optimized(tmp, ~(os::vm_page_size()-1) | markWord::lock_mask_in_place); 958 959 and_(R0/*==0?*/, current_header, tmp); 960 // If condition is true we are done and hence we can store 0 in the displaced 961 // header indicating it is a recursive lock. 962 bne(CCR0, slow_case); 963 std(R0/*==0!*/, BasicObjectLock::lock_offset_in_bytes() + 964 BasicLock::displaced_header_offset_in_bytes(), monitor); 965 b(done); 966 967 // } else { 968 // // Slow path. 969 // InterpreterRuntime::monitorenter(THREAD, monitor); 970 971 // None of the above fast optimizations worked so we have to get into the 972 // slow case of monitor enter. 973 bind(slow_case); 974 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), 975 monitor, /*check_for_exceptions=*/true); 976 // } 977 align(32, 12); 978 bind(done); 979 } 980 } 981 982 // Unlocks an object. Used in monitorexit bytecode and remove_activation. 983 // 984 // Registers alive 985 // monitor - Address of the BasicObjectLock to be used for locking, 986 // which must be initialized with the object to lock. 987 // 988 // Throw IllegalMonitorException if object is not locked by current thread. 989 void InterpreterMacroAssembler::unlock_object(Register monitor, bool check_for_exceptions) { 990 if (UseHeavyMonitors) { 991 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 992 monitor, check_for_exceptions); 993 } else { 994 995 // template code: 996 // 997 // if ((displaced_header = monitor->displaced_header()) == NULL) { 998 // // Recursive unlock. Mark the monitor unlocked by setting the object field to NULL. 999 // monitor->set_obj(NULL); 1000 // } else if (Atomic::cmpxchg(obj->mark_addr(), monitor, displaced_header) == monitor) { 1001 // // We swapped the unlocked mark in displaced_header into the object's mark word. 1002 // monitor->set_obj(NULL); 1003 // } else { 1004 // // Slow path. 1005 // InterpreterRuntime::monitorexit(THREAD, monitor); 1006 // } 1007 1008 const Register object = R7_ARG5; 1009 const Register displaced_header = R8_ARG6; 1010 const Register object_mark_addr = R9_ARG7; 1011 const Register current_header = R10_ARG8; 1012 1013 Label free_slot; 1014 Label slow_case; 1015 1016 assert_different_registers(object, displaced_header, object_mark_addr, current_header); 1017 1018 if (UseBiasedLocking) { 1019 // The object address from the monitor is in object. 1020 ld(object, BasicObjectLock::obj_offset_in_bytes(), monitor); 1021 assert(oopDesc::mark_offset_in_bytes() == 0, "offset of _mark is not 0"); 1022 biased_locking_exit(CCR0, object, displaced_header, free_slot); 1023 } 1024 1025 // Test first if we are in the fast recursive case. 1026 ld(displaced_header, BasicObjectLock::lock_offset_in_bytes() + 1027 BasicLock::displaced_header_offset_in_bytes(), monitor); 1028 1029 // If the displaced header is zero, we have a recursive unlock. 1030 cmpdi(CCR0, displaced_header, 0); 1031 beq(CCR0, free_slot); // recursive unlock 1032 1033 // } else if (Atomic::cmpxchg(obj->mark_addr(), monitor, displaced_header) == monitor) { 1034 // // We swapped the unlocked mark in displaced_header into the object's mark word. 1035 // monitor->set_obj(NULL); 1036 1037 // If we still have a lightweight lock, unlock the object and be done. 1038 1039 // The object address from the monitor is in object. 1040 if (!UseBiasedLocking) { ld(object, BasicObjectLock::obj_offset_in_bytes(), monitor); } 1041 addi(object_mark_addr, object, oopDesc::mark_offset_in_bytes()); 1042 1043 // We have the displaced header in displaced_header. If the lock is still 1044 // lightweight, it will contain the monitor address and we'll store the 1045 // displaced header back into the object's mark word. 1046 // CmpxchgX sets CCR0 to cmpX(current, monitor). 1047 cmpxchgd(/*flag=*/CCR0, 1048 /*current_value=*/current_header, 1049 /*compare_value=*/monitor, /*exchange_value=*/displaced_header, 1050 /*where=*/object_mark_addr, 1051 MacroAssembler::MemBarRel, 1052 MacroAssembler::cmpxchgx_hint_release_lock(), 1053 noreg, 1054 &slow_case); 1055 b(free_slot); 1056 1057 // } else { 1058 // // Slow path. 1059 // InterpreterRuntime::monitorexit(THREAD, monitor); 1060 1061 // The lock has been converted into a heavy lock and hence 1062 // we need to get into the slow case. 1063 bind(slow_case); 1064 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), 1065 monitor, check_for_exceptions); 1066 // } 1067 1068 Label done; 1069 b(done); // Monitor register may be overwritten! Runtime has already freed the slot. 1070 1071 // Exchange worked, do monitor->set_obj(NULL); 1072 align(32, 12); 1073 bind(free_slot); 1074 li(R0, 0); 1075 std(R0, BasicObjectLock::obj_offset_in_bytes(), monitor); 1076 bind(done); 1077 } 1078 } 1079 1080 // Load compiled (i2c) or interpreter entry when calling from interpreted and 1081 // do the call. Centralized so that all interpreter calls will do the same actions. 1082 // If jvmti single stepping is on for a thread we must not call compiled code. 1083 // 1084 // Input: 1085 // - Rtarget_method: method to call 1086 // - Rret_addr: return address 1087 // - 2 scratch regs 1088 // 1089 void InterpreterMacroAssembler::call_from_interpreter(Register Rtarget_method, Register Rret_addr, 1090 Register Rscratch1, Register Rscratch2) { 1091 assert_different_registers(Rscratch1, Rscratch2, Rtarget_method, Rret_addr); 1092 // Assume we want to go compiled if available. 1093 const Register Rtarget_addr = Rscratch1; 1094 const Register Rinterp_only = Rscratch2; 1095 1096 ld(Rtarget_addr, in_bytes(Method::from_interpreted_offset()), Rtarget_method); 1097 1098 if (JvmtiExport::can_post_interpreter_events()) { 1099 lwz(Rinterp_only, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); 1100 1101 // JVMTI events, such as single-stepping, are implemented partly by avoiding running 1102 // compiled code in threads for which the event is enabled. Check here for 1103 // interp_only_mode if these events CAN be enabled. 1104 Label done; 1105 verify_thread(); 1106 cmpwi(CCR0, Rinterp_only, 0); 1107 beq(CCR0, done); 1108 ld(Rtarget_addr, in_bytes(Method::interpreter_entry_offset()), Rtarget_method); 1109 align(32, 12); 1110 bind(done); 1111 } 1112 1113 #ifdef ASSERT 1114 { 1115 Label Lok; 1116 cmpdi(CCR0, Rtarget_addr, 0); 1117 bne(CCR0, Lok); 1118 stop("null entry point"); 1119 bind(Lok); 1120 } 1121 #endif // ASSERT 1122 1123 mr(R21_sender_SP, R1_SP); 1124 1125 // Calc a precise SP for the call. The SP value we calculated in 1126 // generate_fixed_frame() is based on the max_stack() value, so we would waste stack space 1127 // if esp is not max. Also, the i2c adapter extends the stack space without restoring 1128 // our pre-calced value, so repeating calls via i2c would result in stack overflow. 1129 // Since esp already points to an empty slot, we just have to sub 1 additional slot 1130 // to meet the abi scratch requirements. 1131 // The max_stack pointer will get restored by means of the GR_Lmax_stack local in 1132 // the return entry of the interpreter. 1133 addi(Rscratch2, R15_esp, Interpreter::stackElementSize - frame::abi_reg_args_size); 1134 clrrdi(Rscratch2, Rscratch2, exact_log2(frame::alignment_in_bytes)); // round towards smaller address 1135 resize_frame_absolute(Rscratch2, Rscratch2, R0); 1136 1137 mr_if_needed(R19_method, Rtarget_method); 1138 mtctr(Rtarget_addr); 1139 mtlr(Rret_addr); 1140 1141 save_interpreter_state(Rscratch2); 1142 #ifdef ASSERT 1143 ld(Rscratch1, _ijava_state_neg(top_frame_sp), Rscratch2); // Rscratch2 contains fp 1144 cmpd(CCR0, R21_sender_SP, Rscratch1); 1145 asm_assert_eq("top_frame_sp incorrect", 0x951); 1146 #endif 1147 1148 bctr(); 1149 } 1150 1151 // Set the method data pointer for the current bcp. 1152 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { 1153 assert(ProfileInterpreter, "must be profiling interpreter"); 1154 Label get_continue; 1155 ld(R28_mdx, in_bytes(Method::method_data_offset()), R19_method); 1156 test_method_data_pointer(get_continue); 1157 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), R19_method, R14_bcp); 1158 1159 addi(R28_mdx, R28_mdx, in_bytes(MethodData::data_offset())); 1160 add(R28_mdx, R28_mdx, R3_RET); 1161 bind(get_continue); 1162 } 1163 1164 // Test ImethodDataPtr. If it is null, continue at the specified label. 1165 void InterpreterMacroAssembler::test_method_data_pointer(Label& zero_continue) { 1166 assert(ProfileInterpreter, "must be profiling interpreter"); 1167 cmpdi(CCR0, R28_mdx, 0); 1168 beq(CCR0, zero_continue); 1169 } 1170 1171 void InterpreterMacroAssembler::verify_method_data_pointer() { 1172 assert(ProfileInterpreter, "must be profiling interpreter"); 1173 #ifdef ASSERT 1174 Label verify_continue; 1175 test_method_data_pointer(verify_continue); 1176 1177 // If the mdp is valid, it will point to a DataLayout header which is 1178 // consistent with the bcp. The converse is highly probable also. 1179 lhz(R11_scratch1, in_bytes(DataLayout::bci_offset()), R28_mdx); 1180 ld(R12_scratch2, in_bytes(Method::const_offset()), R19_method); 1181 addi(R11_scratch1, R11_scratch1, in_bytes(ConstMethod::codes_offset())); 1182 add(R11_scratch1, R12_scratch2, R12_scratch2); 1183 cmpd(CCR0, R11_scratch1, R14_bcp); 1184 beq(CCR0, verify_continue); 1185 1186 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp ), R19_method, R14_bcp, R28_mdx); 1187 1188 bind(verify_continue); 1189 #endif 1190 } 1191 1192 void InterpreterMacroAssembler::test_invocation_counter_for_mdp(Register invocation_count, 1193 Register method_counters, 1194 Register Rscratch, 1195 Label &profile_continue) { 1196 assert(ProfileInterpreter, "must be profiling interpreter"); 1197 // Control will flow to "profile_continue" if the counter is less than the 1198 // limit or if we call profile_method(). 1199 Label done; 1200 1201 // If no method data exists, and the counter is high enough, make one. 1202 lwz(Rscratch, in_bytes(MethodCounters::interpreter_profile_limit_offset()), method_counters); 1203 1204 cmpdi(CCR0, R28_mdx, 0); 1205 // Test to see if we should create a method data oop. 1206 cmpd(CCR1, Rscratch, invocation_count); 1207 bne(CCR0, done); 1208 bge(CCR1, profile_continue); 1209 1210 // Build it now. 1211 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); 1212 set_method_data_pointer_for_bcp(); 1213 b(profile_continue); 1214 1215 align(32, 12); 1216 bind(done); 1217 } 1218 1219 void InterpreterMacroAssembler::test_backedge_count_for_osr(Register backedge_count, Register method_counters, 1220 Register target_bcp, Register disp, Register Rtmp) { 1221 assert_different_registers(backedge_count, target_bcp, disp, Rtmp, R4_ARG2); 1222 assert(UseOnStackReplacement,"Must UseOnStackReplacement to test_backedge_count_for_osr"); 1223 1224 Label did_not_overflow; 1225 Label overflow_with_error; 1226 1227 lwz(Rtmp, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()), method_counters); 1228 cmpw(CCR0, backedge_count, Rtmp); 1229 1230 blt(CCR0, did_not_overflow); 1231 1232 // When ProfileInterpreter is on, the backedge_count comes from the 1233 // methodDataOop, which value does not get reset on the call to 1234 // frequency_counter_overflow(). To avoid excessive calls to the overflow 1235 // routine while the method is being compiled, add a second test to make sure 1236 // the overflow function is called only once every overflow_frequency. 1237 if (ProfileInterpreter) { 1238 const int overflow_frequency = 1024; 1239 andi_(Rtmp, backedge_count, overflow_frequency-1); 1240 bne(CCR0, did_not_overflow); 1241 } 1242 1243 // Overflow in loop, pass branch bytecode. 1244 subf(R4_ARG2, disp, target_bcp); // Compute branch bytecode (previous bcp). 1245 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R4_ARG2, true); 1246 1247 // Was an OSR adapter generated? 1248 cmpdi(CCR0, R3_RET, 0); 1249 beq(CCR0, overflow_with_error); 1250 1251 // Has the nmethod been invalidated already? 1252 lbz(Rtmp, nmethod::state_offset(), R3_RET); 1253 cmpwi(CCR0, Rtmp, nmethod::in_use); 1254 bne(CCR0, overflow_with_error); 1255 1256 // Migrate the interpreter frame off of the stack. 1257 // We can use all registers because we will not return to interpreter from this point. 1258 1259 // Save nmethod. 1260 const Register osr_nmethod = R31; 1261 mr(osr_nmethod, R3_RET); 1262 set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R11_scratch1); 1263 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin), R16_thread); 1264 reset_last_Java_frame(); 1265 // OSR buffer is in ARG1 1266 1267 // Remove the interpreter frame. 1268 merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2); 1269 1270 // Jump to the osr code. 1271 ld(R11_scratch1, nmethod::osr_entry_point_offset(), osr_nmethod); 1272 mtlr(R0); 1273 mtctr(R11_scratch1); 1274 bctr(); 1275 1276 align(32, 12); 1277 bind(overflow_with_error); 1278 bind(did_not_overflow); 1279 } 1280 1281 // Store a value at some constant offset from the method data pointer. 1282 void InterpreterMacroAssembler::set_mdp_data_at(int constant, Register value) { 1283 assert(ProfileInterpreter, "must be profiling interpreter"); 1284 1285 std(value, constant, R28_mdx); 1286 } 1287 1288 // Increment the value at some constant offset from the method data pointer. 1289 void InterpreterMacroAssembler::increment_mdp_data_at(int constant, 1290 Register counter_addr, 1291 Register Rbumped_count, 1292 bool decrement) { 1293 // Locate the counter at a fixed offset from the mdp: 1294 addi(counter_addr, R28_mdx, constant); 1295 increment_mdp_data_at(counter_addr, Rbumped_count, decrement); 1296 } 1297 1298 // Increment the value at some non-fixed (reg + constant) offset from 1299 // the method data pointer. 1300 void InterpreterMacroAssembler::increment_mdp_data_at(Register reg, 1301 int constant, 1302 Register scratch, 1303 Register Rbumped_count, 1304 bool decrement) { 1305 // Add the constant to reg to get the offset. 1306 add(scratch, R28_mdx, reg); 1307 // Then calculate the counter address. 1308 addi(scratch, scratch, constant); 1309 increment_mdp_data_at(scratch, Rbumped_count, decrement); 1310 } 1311 1312 void InterpreterMacroAssembler::increment_mdp_data_at(Register counter_addr, 1313 Register Rbumped_count, 1314 bool decrement) { 1315 assert(ProfileInterpreter, "must be profiling interpreter"); 1316 1317 // Load the counter. 1318 ld(Rbumped_count, 0, counter_addr); 1319 1320 if (decrement) { 1321 // Decrement the register. Set condition codes. 1322 addi(Rbumped_count, Rbumped_count, - DataLayout::counter_increment); 1323 // Store the decremented counter, if it is still negative. 1324 std(Rbumped_count, 0, counter_addr); 1325 // Note: add/sub overflow check are not ported, since 64 bit 1326 // calculation should never overflow. 1327 } else { 1328 // Increment the register. Set carry flag. 1329 addi(Rbumped_count, Rbumped_count, DataLayout::counter_increment); 1330 // Store the incremented counter. 1331 std(Rbumped_count, 0, counter_addr); 1332 } 1333 } 1334 1335 // Set a flag value at the current method data pointer position. 1336 void InterpreterMacroAssembler::set_mdp_flag_at(int flag_constant, 1337 Register scratch) { 1338 assert(ProfileInterpreter, "must be profiling interpreter"); 1339 // Load the data header. 1340 lbz(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx); 1341 // Set the flag. 1342 ori(scratch, scratch, flag_constant); 1343 // Store the modified header. 1344 stb(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx); 1345 } 1346 1347 // Test the location at some offset from the method data pointer. 1348 // If it is not equal to value, branch to the not_equal_continue Label. 1349 void InterpreterMacroAssembler::test_mdp_data_at(int offset, 1350 Register value, 1351 Label& not_equal_continue, 1352 Register test_out) { 1353 assert(ProfileInterpreter, "must be profiling interpreter"); 1354 1355 ld(test_out, offset, R28_mdx); 1356 cmpd(CCR0, value, test_out); 1357 bne(CCR0, not_equal_continue); 1358 } 1359 1360 // Update the method data pointer by the displacement located at some fixed 1361 // offset from the method data pointer. 1362 void InterpreterMacroAssembler::update_mdp_by_offset(int offset_of_disp, 1363 Register scratch) { 1364 assert(ProfileInterpreter, "must be profiling interpreter"); 1365 1366 ld(scratch, offset_of_disp, R28_mdx); 1367 add(R28_mdx, scratch, R28_mdx); 1368 } 1369 1370 // Update the method data pointer by the displacement located at the 1371 // offset (reg + offset_of_disp). 1372 void InterpreterMacroAssembler::update_mdp_by_offset(Register reg, 1373 int offset_of_disp, 1374 Register scratch) { 1375 assert(ProfileInterpreter, "must be profiling interpreter"); 1376 1377 add(scratch, reg, R28_mdx); 1378 ld(scratch, offset_of_disp, scratch); 1379 add(R28_mdx, scratch, R28_mdx); 1380 } 1381 1382 // Update the method data pointer by a simple constant displacement. 1383 void InterpreterMacroAssembler::update_mdp_by_constant(int constant) { 1384 assert(ProfileInterpreter, "must be profiling interpreter"); 1385 addi(R28_mdx, R28_mdx, constant); 1386 } 1387 1388 // Update the method data pointer for a _ret bytecode whose target 1389 // was not among our cached targets. 1390 void InterpreterMacroAssembler::update_mdp_for_ret(TosState state, 1391 Register return_bci) { 1392 assert(ProfileInterpreter, "must be profiling interpreter"); 1393 1394 push(state); 1395 assert(return_bci->is_nonvolatile(), "need to protect return_bci"); 1396 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci); 1397 pop(state); 1398 } 1399 1400 // Increments the backedge counter. 1401 // Returns backedge counter + invocation counter in Rdst. 1402 void InterpreterMacroAssembler::increment_backedge_counter(const Register Rcounters, const Register Rdst, 1403 const Register Rtmp1, Register Rscratch) { 1404 assert(UseCompiler, "incrementing must be useful"); 1405 assert_different_registers(Rdst, Rtmp1); 1406 const Register invocation_counter = Rtmp1; 1407 const Register counter = Rdst; 1408 // TODO: PPC port: assert(4 == InvocationCounter::sz_counter(), "unexpected field size."); 1409 1410 // Load backedge counter. 1411 lwz(counter, in_bytes(MethodCounters::backedge_counter_offset()) + 1412 in_bytes(InvocationCounter::counter_offset()), Rcounters); 1413 // Load invocation counter. 1414 lwz(invocation_counter, in_bytes(MethodCounters::invocation_counter_offset()) + 1415 in_bytes(InvocationCounter::counter_offset()), Rcounters); 1416 1417 // Add the delta to the backedge counter. 1418 addi(counter, counter, InvocationCounter::count_increment); 1419 1420 // Mask the invocation counter. 1421 andi(invocation_counter, invocation_counter, InvocationCounter::count_mask_value); 1422 1423 // Store new counter value. 1424 stw(counter, in_bytes(MethodCounters::backedge_counter_offset()) + 1425 in_bytes(InvocationCounter::counter_offset()), Rcounters); 1426 // Return invocation counter + backedge counter. 1427 add(counter, counter, invocation_counter); 1428 } 1429 1430 // Count a taken branch in the bytecodes. 1431 void InterpreterMacroAssembler::profile_taken_branch(Register scratch, Register bumped_count) { 1432 if (ProfileInterpreter) { 1433 Label profile_continue; 1434 1435 // If no method data exists, go to profile_continue. 1436 test_method_data_pointer(profile_continue); 1437 1438 // We are taking a branch. Increment the taken count. 1439 increment_mdp_data_at(in_bytes(JumpData::taken_offset()), scratch, bumped_count); 1440 1441 // The method data pointer needs to be updated to reflect the new target. 1442 update_mdp_by_offset(in_bytes(JumpData::displacement_offset()), scratch); 1443 bind (profile_continue); 1444 } 1445 } 1446 1447 // Count a not-taken branch in the bytecodes. 1448 void InterpreterMacroAssembler::profile_not_taken_branch(Register scratch1, Register scratch2) { 1449 if (ProfileInterpreter) { 1450 Label profile_continue; 1451 1452 // If no method data exists, go to profile_continue. 1453 test_method_data_pointer(profile_continue); 1454 1455 // We are taking a branch. Increment the not taken count. 1456 increment_mdp_data_at(in_bytes(BranchData::not_taken_offset()), scratch1, scratch2); 1457 1458 // The method data pointer needs to be updated to correspond to the 1459 // next bytecode. 1460 update_mdp_by_constant(in_bytes(BranchData::branch_data_size())); 1461 bind (profile_continue); 1462 } 1463 } 1464 1465 // Count a non-virtual call in the bytecodes. 1466 void InterpreterMacroAssembler::profile_call(Register scratch1, Register scratch2) { 1467 if (ProfileInterpreter) { 1468 Label profile_continue; 1469 1470 // If no method data exists, go to profile_continue. 1471 test_method_data_pointer(profile_continue); 1472 1473 // We are making a call. Increment the count. 1474 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); 1475 1476 // The method data pointer needs to be updated to reflect the new target. 1477 update_mdp_by_constant(in_bytes(CounterData::counter_data_size())); 1478 bind (profile_continue); 1479 } 1480 } 1481 1482 // Count a final call in the bytecodes. 1483 void InterpreterMacroAssembler::profile_final_call(Register scratch1, Register scratch2) { 1484 if (ProfileInterpreter) { 1485 Label profile_continue; 1486 1487 // If no method data exists, go to profile_continue. 1488 test_method_data_pointer(profile_continue); 1489 1490 // We are making a call. Increment the count. 1491 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); 1492 1493 // The method data pointer needs to be updated to reflect the new target. 1494 update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size())); 1495 bind (profile_continue); 1496 } 1497 } 1498 1499 // Count a virtual call in the bytecodes. 1500 void InterpreterMacroAssembler::profile_virtual_call(Register Rreceiver, 1501 Register Rscratch1, 1502 Register Rscratch2, 1503 bool receiver_can_be_null) { 1504 if (!ProfileInterpreter) { return; } 1505 Label profile_continue; 1506 1507 // If no method data exists, go to profile_continue. 1508 test_method_data_pointer(profile_continue); 1509 1510 Label skip_receiver_profile; 1511 if (receiver_can_be_null) { 1512 Label not_null; 1513 cmpdi(CCR0, Rreceiver, 0); 1514 bne(CCR0, not_null); 1515 // We are making a call. Increment the count for null receiver. 1516 increment_mdp_data_at(in_bytes(CounterData::count_offset()), Rscratch1, Rscratch2); 1517 b(skip_receiver_profile); 1518 bind(not_null); 1519 } 1520 1521 // Record the receiver type. 1522 record_klass_in_profile(Rreceiver, Rscratch1, Rscratch2, true); 1523 bind(skip_receiver_profile); 1524 1525 // The method data pointer needs to be updated to reflect the new target. 1526 update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size())); 1527 bind (profile_continue); 1528 } 1529 1530 void InterpreterMacroAssembler::profile_typecheck(Register Rklass, Register Rscratch1, Register Rscratch2) { 1531 if (ProfileInterpreter) { 1532 Label profile_continue; 1533 1534 // If no method data exists, go to profile_continue. 1535 test_method_data_pointer(profile_continue); 1536 1537 int mdp_delta = in_bytes(BitData::bit_data_size()); 1538 if (TypeProfileCasts) { 1539 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1540 1541 // Record the object type. 1542 record_klass_in_profile(Rklass, Rscratch1, Rscratch2, false); 1543 } 1544 1545 // The method data pointer needs to be updated. 1546 update_mdp_by_constant(mdp_delta); 1547 1548 bind (profile_continue); 1549 } 1550 } 1551 1552 void InterpreterMacroAssembler::profile_typecheck_failed(Register Rscratch1, Register Rscratch2) { 1553 if (ProfileInterpreter && TypeProfileCasts) { 1554 Label profile_continue; 1555 1556 // If no method data exists, go to profile_continue. 1557 test_method_data_pointer(profile_continue); 1558 1559 int count_offset = in_bytes(CounterData::count_offset()); 1560 // Back up the address, since we have already bumped the mdp. 1561 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); 1562 1563 // *Decrement* the counter. We expect to see zero or small negatives. 1564 increment_mdp_data_at(count_offset, Rscratch1, Rscratch2, true); 1565 1566 bind (profile_continue); 1567 } 1568 } 1569 1570 // Count a ret in the bytecodes. 1571 void InterpreterMacroAssembler::profile_ret(TosState state, Register return_bci, 1572 Register scratch1, Register scratch2) { 1573 if (ProfileInterpreter) { 1574 Label profile_continue; 1575 uint row; 1576 1577 // If no method data exists, go to profile_continue. 1578 test_method_data_pointer(profile_continue); 1579 1580 // Update the total ret count. 1581 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2 ); 1582 1583 for (row = 0; row < RetData::row_limit(); row++) { 1584 Label next_test; 1585 1586 // See if return_bci is equal to bci[n]: 1587 test_mdp_data_at(in_bytes(RetData::bci_offset(row)), return_bci, next_test, scratch1); 1588 1589 // return_bci is equal to bci[n]. Increment the count. 1590 increment_mdp_data_at(in_bytes(RetData::bci_count_offset(row)), scratch1, scratch2); 1591 1592 // The method data pointer needs to be updated to reflect the new target. 1593 update_mdp_by_offset(in_bytes(RetData::bci_displacement_offset(row)), scratch1); 1594 b(profile_continue); 1595 bind(next_test); 1596 } 1597 1598 update_mdp_for_ret(state, return_bci); 1599 1600 bind (profile_continue); 1601 } 1602 } 1603 1604 // Count the default case of a switch construct. 1605 void InterpreterMacroAssembler::profile_switch_default(Register scratch1, Register scratch2) { 1606 if (ProfileInterpreter) { 1607 Label profile_continue; 1608 1609 // If no method data exists, go to profile_continue. 1610 test_method_data_pointer(profile_continue); 1611 1612 // Update the default case count 1613 increment_mdp_data_at(in_bytes(MultiBranchData::default_count_offset()), 1614 scratch1, scratch2); 1615 1616 // The method data pointer needs to be updated. 1617 update_mdp_by_offset(in_bytes(MultiBranchData::default_displacement_offset()), 1618 scratch1); 1619 1620 bind (profile_continue); 1621 } 1622 } 1623 1624 // Count the index'th case of a switch construct. 1625 void InterpreterMacroAssembler::profile_switch_case(Register index, 1626 Register scratch1, 1627 Register scratch2, 1628 Register scratch3) { 1629 if (ProfileInterpreter) { 1630 assert_different_registers(index, scratch1, scratch2, scratch3); 1631 Label profile_continue; 1632 1633 // If no method data exists, go to profile_continue. 1634 test_method_data_pointer(profile_continue); 1635 1636 // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes(). 1637 li(scratch3, in_bytes(MultiBranchData::case_array_offset())); 1638 1639 assert (in_bytes(MultiBranchData::per_case_size()) == 16, "so that shladd works"); 1640 sldi(scratch1, index, exact_log2(in_bytes(MultiBranchData::per_case_size()))); 1641 add(scratch1, scratch1, scratch3); 1642 1643 // Update the case count. 1644 increment_mdp_data_at(scratch1, in_bytes(MultiBranchData::relative_count_offset()), scratch2, scratch3); 1645 1646 // The method data pointer needs to be updated. 1647 update_mdp_by_offset(scratch1, in_bytes(MultiBranchData::relative_displacement_offset()), scratch2); 1648 1649 bind (profile_continue); 1650 } 1651 } 1652 1653 void InterpreterMacroAssembler::profile_null_seen(Register Rscratch1, Register Rscratch2) { 1654 if (ProfileInterpreter) { 1655 assert_different_registers(Rscratch1, Rscratch2); 1656 Label profile_continue; 1657 1658 // If no method data exists, go to profile_continue. 1659 test_method_data_pointer(profile_continue); 1660 1661 set_mdp_flag_at(BitData::null_seen_byte_constant(), Rscratch1); 1662 1663 // The method data pointer needs to be updated. 1664 int mdp_delta = in_bytes(BitData::bit_data_size()); 1665 if (TypeProfileCasts) { 1666 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); 1667 } 1668 update_mdp_by_constant(mdp_delta); 1669 1670 bind (profile_continue); 1671 } 1672 } 1673 1674 void InterpreterMacroAssembler::record_klass_in_profile(Register Rreceiver, 1675 Register Rscratch1, Register Rscratch2, 1676 bool is_virtual_call) { 1677 assert(ProfileInterpreter, "must be profiling"); 1678 assert_different_registers(Rreceiver, Rscratch1, Rscratch2); 1679 1680 Label done; 1681 record_klass_in_profile_helper(Rreceiver, Rscratch1, Rscratch2, 0, done, is_virtual_call); 1682 bind (done); 1683 } 1684 1685 void InterpreterMacroAssembler::record_klass_in_profile_helper( 1686 Register receiver, Register scratch1, Register scratch2, 1687 int start_row, Label& done, bool is_virtual_call) { 1688 if (TypeProfileWidth == 0) { 1689 if (is_virtual_call) { 1690 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); 1691 } 1692 return; 1693 } 1694 1695 int last_row = VirtualCallData::row_limit() - 1; 1696 assert(start_row <= last_row, "must be work left to do"); 1697 // Test this row for both the receiver and for null. 1698 // Take any of three different outcomes: 1699 // 1. found receiver => increment count and goto done 1700 // 2. found null => keep looking for case 1, maybe allocate this cell 1701 // 3. found something else => keep looking for cases 1 and 2 1702 // Case 3 is handled by a recursive call. 1703 for (int row = start_row; row <= last_row; row++) { 1704 Label next_test; 1705 bool test_for_null_also = (row == start_row); 1706 1707 // See if the receiver is receiver[n]. 1708 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); 1709 test_mdp_data_at(recvr_offset, receiver, next_test, scratch1); 1710 // delayed()->tst(scratch); 1711 1712 // The receiver is receiver[n]. Increment count[n]. 1713 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); 1714 increment_mdp_data_at(count_offset, scratch1, scratch2); 1715 b(done); 1716 bind(next_test); 1717 1718 if (test_for_null_also) { 1719 Label found_null; 1720 // Failed the equality check on receiver[n]... Test for null. 1721 if (start_row == last_row) { 1722 // The only thing left to do is handle the null case. 1723 if (is_virtual_call) { 1724 // Scratch1 contains test_out from test_mdp_data_at. 1725 cmpdi(CCR0, scratch1, 0); 1726 beq(CCR0, found_null); 1727 // Receiver did not match any saved receiver and there is no empty row for it. 1728 // Increment total counter to indicate polymorphic case. 1729 increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); 1730 b(done); 1731 bind(found_null); 1732 } else { 1733 cmpdi(CCR0, scratch1, 0); 1734 bne(CCR0, done); 1735 } 1736 break; 1737 } 1738 // Since null is rare, make it be the branch-taken case. 1739 cmpdi(CCR0, scratch1, 0); 1740 beq(CCR0, found_null); 1741 1742 // Put all the "Case 3" tests here. 1743 record_klass_in_profile_helper(receiver, scratch1, scratch2, start_row + 1, done, is_virtual_call); 1744 1745 // Found a null. Keep searching for a matching receiver, 1746 // but remember that this is an empty (unused) slot. 1747 bind(found_null); 1748 } 1749 } 1750 1751 // In the fall-through case, we found no matching receiver, but we 1752 // observed the receiver[start_row] is NULL. 1753 1754 // Fill in the receiver field and increment the count. 1755 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); 1756 set_mdp_data_at(recvr_offset, receiver); 1757 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); 1758 li(scratch1, DataLayout::counter_increment); 1759 set_mdp_data_at(count_offset, scratch1); 1760 if (start_row > 0) { 1761 b(done); 1762 } 1763 } 1764 1765 // Argument and return type profilig. 1766 // kills: tmp, tmp2, R0, CR0, CR1 1767 void InterpreterMacroAssembler::profile_obj_type(Register obj, Register mdo_addr_base, 1768 RegisterOrConstant mdo_addr_offs, 1769 Register tmp, Register tmp2) { 1770 Label do_nothing, do_update; 1771 1772 // tmp2 = obj is allowed 1773 assert_different_registers(obj, mdo_addr_base, tmp, R0); 1774 assert_different_registers(tmp2, mdo_addr_base, tmp, R0); 1775 const Register klass = tmp2; 1776 1777 verify_oop(obj); 1778 1779 ld(tmp, mdo_addr_offs, mdo_addr_base); 1780 1781 // Set null_seen if obj is 0. 1782 cmpdi(CCR0, obj, 0); 1783 ori(R0, tmp, TypeEntries::null_seen); 1784 beq(CCR0, do_update); 1785 1786 load_klass(klass, obj); 1787 1788 clrrdi(R0, tmp, exact_log2(-TypeEntries::type_klass_mask)); 1789 // Basically same as andi(R0, tmp, TypeEntries::type_klass_mask); 1790 cmpd(CCR1, R0, klass); 1791 // Klass seen before, nothing to do (regardless of unknown bit). 1792 //beq(CCR1, do_nothing); 1793 1794 andi_(R0, klass, TypeEntries::type_unknown); 1795 // Already unknown. Nothing to do anymore. 1796 //bne(CCR0, do_nothing); 1797 crorc(CCR0, Assembler::equal, CCR1, Assembler::equal); // cr0 eq = cr1 eq or cr0 ne 1798 beq(CCR0, do_nothing); 1799 1800 clrrdi_(R0, tmp, exact_log2(-TypeEntries::type_mask)); 1801 orr(R0, klass, tmp); // Combine klass and null_seen bit (only used if (tmp & type_mask)==0). 1802 beq(CCR0, do_update); // First time here. Set profile type. 1803 1804 // Different than before. Cannot keep accurate profile. 1805 ori(R0, tmp, TypeEntries::type_unknown); 1806 1807 bind(do_update); 1808 // update profile 1809 std(R0, mdo_addr_offs, mdo_addr_base); 1810 1811 align(32, 12); 1812 bind(do_nothing); 1813 } 1814 1815 void InterpreterMacroAssembler::profile_arguments_type(Register callee, 1816 Register tmp1, Register tmp2, 1817 bool is_virtual) { 1818 if (!ProfileInterpreter) { 1819 return; 1820 } 1821 1822 assert_different_registers(callee, tmp1, tmp2, R28_mdx); 1823 1824 if (MethodData::profile_arguments() || MethodData::profile_return()) { 1825 Label profile_continue; 1826 1827 test_method_data_pointer(profile_continue); 1828 1829 int off_to_start = is_virtual ? 1830 in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size()); 1831 1832 lbz(tmp1, in_bytes(DataLayout::tag_offset()) - off_to_start, R28_mdx); 1833 cmpwi(CCR0, tmp1, is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag); 1834 bne(CCR0, profile_continue); 1835 1836 if (MethodData::profile_arguments()) { 1837 Label done; 1838 int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset()); 1839 add(R28_mdx, off_to_args, R28_mdx); 1840 1841 for (int i = 0; i < TypeProfileArgsLimit; i++) { 1842 if (i > 0 || MethodData::profile_return()) { 1843 // If return value type is profiled we may have no argument to profile. 1844 ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx); 1845 cmpdi(CCR0, tmp1, (i+1)*TypeStackSlotEntries::per_arg_count()); 1846 addi(tmp1, tmp1, -i*TypeStackSlotEntries::per_arg_count()); 1847 blt(CCR0, done); 1848 } 1849 ld(tmp1, in_bytes(Method::const_offset()), callee); 1850 lhz(tmp1, in_bytes(ConstMethod::size_of_parameters_offset()), tmp1); 1851 // Stack offset o (zero based) from the start of the argument 1852 // list, for n arguments translates into offset n - o - 1 from 1853 // the end of the argument list. But there's an extra slot at 1854 // the top of the stack. So the offset is n - o from Lesp. 1855 ld(tmp2, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args, R28_mdx); 1856 subf(tmp1, tmp2, tmp1); 1857 1858 sldi(tmp1, tmp1, Interpreter::logStackElementSize); 1859 ldx(tmp1, tmp1, R15_esp); 1860 1861 profile_obj_type(tmp1, R28_mdx, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args, tmp2, tmp1); 1862 1863 int to_add = in_bytes(TypeStackSlotEntries::per_arg_size()); 1864 addi(R28_mdx, R28_mdx, to_add); 1865 off_to_args += to_add; 1866 } 1867 1868 if (MethodData::profile_return()) { 1869 ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx); 1870 addi(tmp1, tmp1, -TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count()); 1871 } 1872 1873 bind(done); 1874 1875 if (MethodData::profile_return()) { 1876 // We're right after the type profile for the last 1877 // argument. tmp1 is the number of cells left in the 1878 // CallTypeData/VirtualCallTypeData to reach its end. Non null 1879 // if there's a return to profile. 1880 assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), 1881 "can't move past ret type"); 1882 sldi(tmp1, tmp1, exact_log2(DataLayout::cell_size)); 1883 add(R28_mdx, tmp1, R28_mdx); 1884 } 1885 } else { 1886 assert(MethodData::profile_return(), "either profile call args or call ret"); 1887 update_mdp_by_constant(in_bytes(TypeEntriesAtCall::return_only_size())); 1888 } 1889 1890 // Mdp points right after the end of the 1891 // CallTypeData/VirtualCallTypeData, right after the cells for the 1892 // return value type if there's one. 1893 align(32, 12); 1894 bind(profile_continue); 1895 } 1896 } 1897 1898 void InterpreterMacroAssembler::profile_return_type(Register ret, Register tmp1, Register tmp2) { 1899 assert_different_registers(ret, tmp1, tmp2); 1900 if (ProfileInterpreter && MethodData::profile_return()) { 1901 Label profile_continue; 1902 1903 test_method_data_pointer(profile_continue); 1904 1905 if (MethodData::profile_return_jsr292_only()) { 1906 // If we don't profile all invoke bytecodes we must make sure 1907 // it's a bytecode we indeed profile. We can't go back to the 1908 // begining of the ProfileData we intend to update to check its 1909 // type because we're right after it and we don't known its 1910 // length. 1911 lbz(tmp1, 0, R14_bcp); 1912 lbz(tmp2, Method::intrinsic_id_offset_in_bytes(), R19_method); 1913 cmpwi(CCR0, tmp1, Bytecodes::_invokedynamic); 1914 cmpwi(CCR1, tmp1, Bytecodes::_invokehandle); 1915 cror(CCR0, Assembler::equal, CCR1, Assembler::equal); 1916 cmpwi(CCR1, tmp2, vmIntrinsics::_compiledLambdaForm); 1917 cror(CCR0, Assembler::equal, CCR1, Assembler::equal); 1918 bne(CCR0, profile_continue); 1919 } 1920 1921 profile_obj_type(ret, R28_mdx, -in_bytes(ReturnTypeEntry::size()), tmp1, tmp2); 1922 1923 align(32, 12); 1924 bind(profile_continue); 1925 } 1926 } 1927 1928 void InterpreterMacroAssembler::profile_parameters_type(Register tmp1, Register tmp2, 1929 Register tmp3, Register tmp4) { 1930 if (ProfileInterpreter && MethodData::profile_parameters()) { 1931 Label profile_continue, done; 1932 1933 test_method_data_pointer(profile_continue); 1934 1935 // Load the offset of the area within the MDO used for 1936 // parameters. If it's negative we're not profiling any parameters. 1937 lwz(tmp1, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()), R28_mdx); 1938 cmpwi(CCR0, tmp1, 0); 1939 blt(CCR0, profile_continue); 1940 1941 // Compute a pointer to the area for parameters from the offset 1942 // and move the pointer to the slot for the last 1943 // parameters. Collect profiling from last parameter down. 1944 // mdo start + parameters offset + array length - 1 1945 1946 // Pointer to the parameter area in the MDO. 1947 const Register mdp = tmp1; 1948 add(mdp, tmp1, R28_mdx); 1949 1950 // Offset of the current profile entry to update. 1951 const Register entry_offset = tmp2; 1952 // entry_offset = array len in number of cells 1953 ld(entry_offset, in_bytes(ArrayData::array_len_offset()), mdp); 1954 1955 int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0)); 1956 assert(off_base % DataLayout::cell_size == 0, "should be a number of cells"); 1957 1958 // entry_offset (number of cells) = array len - size of 1 entry + offset of the stack slot field 1959 addi(entry_offset, entry_offset, -TypeStackSlotEntries::per_arg_count() + (off_base / DataLayout::cell_size)); 1960 // entry_offset in bytes 1961 sldi(entry_offset, entry_offset, exact_log2(DataLayout::cell_size)); 1962 1963 Label loop; 1964 align(32, 12); 1965 bind(loop); 1966 1967 // Load offset on the stack from the slot for this parameter. 1968 ld(tmp3, entry_offset, mdp); 1969 sldi(tmp3, tmp3, Interpreter::logStackElementSize); 1970 neg(tmp3, tmp3); 1971 // Read the parameter from the local area. 1972 ldx(tmp3, tmp3, R18_locals); 1973 1974 // Make entry_offset now point to the type field for this parameter. 1975 int type_base = in_bytes(ParametersTypeData::type_offset(0)); 1976 assert(type_base > off_base, "unexpected"); 1977 addi(entry_offset, entry_offset, type_base - off_base); 1978 1979 // Profile the parameter. 1980 profile_obj_type(tmp3, mdp, entry_offset, tmp4, tmp3); 1981 1982 // Go to next parameter. 1983 int delta = TypeStackSlotEntries::per_arg_count() * DataLayout::cell_size + (type_base - off_base); 1984 cmpdi(CCR0, entry_offset, off_base + delta); 1985 addi(entry_offset, entry_offset, -delta); 1986 bge(CCR0, loop); 1987 1988 align(32, 12); 1989 bind(profile_continue); 1990 } 1991 } 1992 1993 // Add a InterpMonitorElem to stack (see frame_sparc.hpp). 1994 void InterpreterMacroAssembler::add_monitor_to_stack(bool stack_is_empty, Register Rtemp1, Register Rtemp2) { 1995 1996 // Very-local scratch registers. 1997 const Register esp = Rtemp1; 1998 const Register slot = Rtemp2; 1999 2000 // Extracted monitor_size. 2001 int monitor_size = frame::interpreter_frame_monitor_size_in_bytes(); 2002 assert(Assembler::is_aligned((unsigned int)monitor_size, 2003 (unsigned int)frame::alignment_in_bytes), 2004 "size of a monitor must respect alignment of SP"); 2005 2006 resize_frame(-monitor_size, /*temp*/esp); // Allocate space for new monitor 2007 std(R1_SP, _ijava_state_neg(top_frame_sp), esp); // esp contains fp 2008 2009 // Shuffle expression stack down. Recall that stack_base points 2010 // just above the new expression stack bottom. Old_tos and new_tos 2011 // are used to scan thru the old and new expression stacks. 2012 if (!stack_is_empty) { 2013 Label copy_slot, copy_slot_finished; 2014 const Register n_slots = slot; 2015 2016 addi(esp, R15_esp, Interpreter::stackElementSize); // Point to first element (pre-pushed stack). 2017 subf(n_slots, esp, R26_monitor); 2018 srdi_(n_slots, n_slots, LogBytesPerWord); // Compute number of slots to copy. 2019 assert(LogBytesPerWord == 3, "conflicts assembler instructions"); 2020 beq(CCR0, copy_slot_finished); // Nothing to copy. 2021 2022 mtctr(n_slots); 2023 2024 // loop 2025 bind(copy_slot); 2026 ld(slot, 0, esp); // Move expression stack down. 2027 std(slot, -monitor_size, esp); // distance = monitor_size 2028 addi(esp, esp, BytesPerWord); 2029 bdnz(copy_slot); 2030 2031 bind(copy_slot_finished); 2032 } 2033 2034 addi(R15_esp, R15_esp, -monitor_size); 2035 addi(R26_monitor, R26_monitor, -monitor_size); 2036 2037 // Restart interpreter 2038 } 2039 2040 // ============================================================================ 2041 // Java locals access 2042 2043 // Load a local variable at index in Rindex into register Rdst_value. 2044 // Also puts address of local into Rdst_address as a service. 2045 // Kills: 2046 // - Rdst_value 2047 // - Rdst_address 2048 void InterpreterMacroAssembler::load_local_int(Register Rdst_value, Register Rdst_address, Register Rindex) { 2049 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); 2050 subf(Rdst_address, Rdst_address, R18_locals); 2051 lwz(Rdst_value, 0, Rdst_address); 2052 } 2053 2054 // Load a local variable at index in Rindex into register Rdst_value. 2055 // Also puts address of local into Rdst_address as a service. 2056 // Kills: 2057 // - Rdst_value 2058 // - Rdst_address 2059 void InterpreterMacroAssembler::load_local_long(Register Rdst_value, Register Rdst_address, Register Rindex) { 2060 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); 2061 subf(Rdst_address, Rdst_address, R18_locals); 2062 ld(Rdst_value, -8, Rdst_address); 2063 } 2064 2065 // Load a local variable at index in Rindex into register Rdst_value. 2066 // Also puts address of local into Rdst_address as a service. 2067 // Input: 2068 // - Rindex: slot nr of local variable 2069 // Kills: 2070 // - Rdst_value 2071 // - Rdst_address 2072 void InterpreterMacroAssembler::load_local_ptr(Register Rdst_value, 2073 Register Rdst_address, 2074 Register Rindex) { 2075 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); 2076 subf(Rdst_address, Rdst_address, R18_locals); 2077 ld(Rdst_value, 0, Rdst_address); 2078 } 2079 2080 // Load a local variable at index in Rindex into register Rdst_value. 2081 // Also puts address of local into Rdst_address as a service. 2082 // Kills: 2083 // - Rdst_value 2084 // - Rdst_address 2085 void InterpreterMacroAssembler::load_local_float(FloatRegister Rdst_value, 2086 Register Rdst_address, 2087 Register Rindex) { 2088 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); 2089 subf(Rdst_address, Rdst_address, R18_locals); 2090 lfs(Rdst_value, 0, Rdst_address); 2091 } 2092 2093 // Load a local variable at index in Rindex into register Rdst_value. 2094 // Also puts address of local into Rdst_address as a service. 2095 // Kills: 2096 // - Rdst_value 2097 // - Rdst_address 2098 void InterpreterMacroAssembler::load_local_double(FloatRegister Rdst_value, 2099 Register Rdst_address, 2100 Register Rindex) { 2101 sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); 2102 subf(Rdst_address, Rdst_address, R18_locals); 2103 lfd(Rdst_value, -8, Rdst_address); 2104 } 2105 2106 // Store an int value at local variable slot Rindex. 2107 // Kills: 2108 // - Rindex 2109 void InterpreterMacroAssembler::store_local_int(Register Rvalue, Register Rindex) { 2110 sldi(Rindex, Rindex, Interpreter::logStackElementSize); 2111 subf(Rindex, Rindex, R18_locals); 2112 stw(Rvalue, 0, Rindex); 2113 } 2114 2115 // Store a long value at local variable slot Rindex. 2116 // Kills: 2117 // - Rindex 2118 void InterpreterMacroAssembler::store_local_long(Register Rvalue, Register Rindex) { 2119 sldi(Rindex, Rindex, Interpreter::logStackElementSize); 2120 subf(Rindex, Rindex, R18_locals); 2121 std(Rvalue, -8, Rindex); 2122 } 2123 2124 // Store an oop value at local variable slot Rindex. 2125 // Kills: 2126 // - Rindex 2127 void InterpreterMacroAssembler::store_local_ptr(Register Rvalue, Register Rindex) { 2128 sldi(Rindex, Rindex, Interpreter::logStackElementSize); 2129 subf(Rindex, Rindex, R18_locals); 2130 std(Rvalue, 0, Rindex); 2131 } 2132 2133 // Store an int value at local variable slot Rindex. 2134 // Kills: 2135 // - Rindex 2136 void InterpreterMacroAssembler::store_local_float(FloatRegister Rvalue, Register Rindex) { 2137 sldi(Rindex, Rindex, Interpreter::logStackElementSize); 2138 subf(Rindex, Rindex, R18_locals); 2139 stfs(Rvalue, 0, Rindex); 2140 } 2141 2142 // Store an int value at local variable slot Rindex. 2143 // Kills: 2144 // - Rindex 2145 void InterpreterMacroAssembler::store_local_double(FloatRegister Rvalue, Register Rindex) { 2146 sldi(Rindex, Rindex, Interpreter::logStackElementSize); 2147 subf(Rindex, Rindex, R18_locals); 2148 stfd(Rvalue, -8, Rindex); 2149 } 2150 2151 // Read pending exception from thread and jump to interpreter. 2152 // Throw exception entry if one if pending. Fall through otherwise. 2153 void InterpreterMacroAssembler::check_and_forward_exception(Register Rscratch1, Register Rscratch2) { 2154 assert_different_registers(Rscratch1, Rscratch2, R3); 2155 Register Rexception = Rscratch1; 2156 Register Rtmp = Rscratch2; 2157 Label Ldone; 2158 // Get pending exception oop. 2159 ld(Rexception, thread_(pending_exception)); 2160 cmpdi(CCR0, Rexception, 0); 2161 beq(CCR0, Ldone); 2162 li(Rtmp, 0); 2163 mr_if_needed(R3, Rexception); 2164 std(Rtmp, thread_(pending_exception)); // Clear exception in thread 2165 if (Interpreter::rethrow_exception_entry() != NULL) { 2166 // Already got entry address. 2167 load_dispatch_table(Rtmp, (address*)Interpreter::rethrow_exception_entry()); 2168 } else { 2169 // Dynamically load entry address. 2170 int simm16_rest = load_const_optimized(Rtmp, &Interpreter::_rethrow_exception_entry, R0, true); 2171 ld(Rtmp, simm16_rest, Rtmp); 2172 } 2173 mtctr(Rtmp); 2174 save_interpreter_state(Rtmp); 2175 bctr(); 2176 2177 align(32, 12); 2178 bind(Ldone); 2179 } 2180 2181 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, bool check_exceptions) { 2182 save_interpreter_state(R11_scratch1); 2183 2184 MacroAssembler::call_VM(oop_result, entry_point, false); 2185 2186 restore_interpreter_state(R11_scratch1, /*bcp_and_mdx_only*/ true); 2187 2188 check_and_handle_popframe(R11_scratch1); 2189 check_and_handle_earlyret(R11_scratch1); 2190 // Now check exceptions manually. 2191 if (check_exceptions) { 2192 check_and_forward_exception(R11_scratch1, R12_scratch2); 2193 } 2194 } 2195 2196 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, 2197 Register arg_1, bool check_exceptions) { 2198 // ARG1 is reserved for the thread. 2199 mr_if_needed(R4_ARG2, arg_1); 2200 call_VM(oop_result, entry_point, check_exceptions); 2201 } 2202 2203 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, 2204 Register arg_1, Register arg_2, 2205 bool check_exceptions) { 2206 // ARG1 is reserved for the thread. 2207 mr_if_needed(R4_ARG2, arg_1); 2208 assert(arg_2 != R4_ARG2, "smashed argument"); 2209 mr_if_needed(R5_ARG3, arg_2); 2210 call_VM(oop_result, entry_point, check_exceptions); 2211 } 2212 2213 void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, 2214 Register arg_1, Register arg_2, Register arg_3, 2215 bool check_exceptions) { 2216 // ARG1 is reserved for the thread. 2217 mr_if_needed(R4_ARG2, arg_1); 2218 assert(arg_2 != R4_ARG2, "smashed argument"); 2219 mr_if_needed(R5_ARG3, arg_2); 2220 assert(arg_3 != R4_ARG2 && arg_3 != R5_ARG3, "smashed argument"); 2221 mr_if_needed(R6_ARG4, arg_3); 2222 call_VM(oop_result, entry_point, check_exceptions); 2223 } 2224 2225 void InterpreterMacroAssembler::save_interpreter_state(Register scratch) { 2226 ld(scratch, 0, R1_SP); 2227 std(R15_esp, _ijava_state_neg(esp), scratch); 2228 std(R14_bcp, _ijava_state_neg(bcp), scratch); 2229 std(R26_monitor, _ijava_state_neg(monitors), scratch); 2230 if (ProfileInterpreter) { std(R28_mdx, _ijava_state_neg(mdx), scratch); } 2231 // Other entries should be unchanged. 2232 } 2233 2234 void InterpreterMacroAssembler::restore_interpreter_state(Register scratch, bool bcp_and_mdx_only) { 2235 ld(scratch, 0, R1_SP); 2236 ld(R14_bcp, _ijava_state_neg(bcp), scratch); // Changed by VM code (exception). 2237 if (ProfileInterpreter) { ld(R28_mdx, _ijava_state_neg(mdx), scratch); } // Changed by VM code. 2238 if (!bcp_and_mdx_only) { 2239 // Following ones are Metadata. 2240 ld(R19_method, _ijava_state_neg(method), scratch); 2241 ld(R27_constPoolCache, _ijava_state_neg(cpoolCache), scratch); 2242 // Following ones are stack addresses and don't require reload. 2243 ld(R15_esp, _ijava_state_neg(esp), scratch); 2244 ld(R18_locals, _ijava_state_neg(locals), scratch); 2245 ld(R26_monitor, _ijava_state_neg(monitors), scratch); 2246 } 2247 #ifdef ASSERT 2248 { 2249 Label Lok; 2250 subf(R0, R1_SP, scratch); 2251 cmpdi(CCR0, R0, frame::abi_reg_args_size + frame::ijava_state_size); 2252 bge(CCR0, Lok); 2253 stop("frame too small (restore istate)", 0x5432); 2254 bind(Lok); 2255 } 2256 #endif 2257 } 2258 2259 void InterpreterMacroAssembler::get_method_counters(Register method, 2260 Register Rcounters, 2261 Label& skip) { 2262 BLOCK_COMMENT("Load and ev. allocate counter object {"); 2263 Label has_counters; 2264 ld(Rcounters, in_bytes(Method::method_counters_offset()), method); 2265 cmpdi(CCR0, Rcounters, 0); 2266 bne(CCR0, has_counters); 2267 call_VM(noreg, CAST_FROM_FN_PTR(address, 2268 InterpreterRuntime::build_method_counters), method); 2269 ld(Rcounters, in_bytes(Method::method_counters_offset()), method); 2270 cmpdi(CCR0, Rcounters, 0); 2271 beq(CCR0, skip); // No MethodCounters, OutOfMemory. 2272 BLOCK_COMMENT("} Load and ev. allocate counter object"); 2273 2274 bind(has_counters); 2275 } 2276 2277 void InterpreterMacroAssembler::increment_invocation_counter(Register Rcounters, 2278 Register iv_be_count, 2279 Register Rtmp_r0) { 2280 assert(UseCompiler || LogTouchedMethods, "incrementing must be useful"); 2281 Register invocation_count = iv_be_count; 2282 Register backedge_count = Rtmp_r0; 2283 int delta = InvocationCounter::count_increment; 2284 2285 // Load each counter in a register. 2286 // ld(inv_counter, Rtmp); 2287 // ld(be_counter, Rtmp2); 2288 int inv_counter_offset = in_bytes(MethodCounters::invocation_counter_offset() + 2289 InvocationCounter::counter_offset()); 2290 int be_counter_offset = in_bytes(MethodCounters::backedge_counter_offset() + 2291 InvocationCounter::counter_offset()); 2292 2293 BLOCK_COMMENT("Increment profiling counters {"); 2294 2295 // Load the backedge counter. 2296 lwz(backedge_count, be_counter_offset, Rcounters); // is unsigned int 2297 // Mask the backedge counter. 2298 andi(backedge_count, backedge_count, InvocationCounter::count_mask_value); 2299 2300 // Load the invocation counter. 2301 lwz(invocation_count, inv_counter_offset, Rcounters); // is unsigned int 2302 // Add the delta to the invocation counter and store the result. 2303 addi(invocation_count, invocation_count, delta); 2304 // Store value. 2305 stw(invocation_count, inv_counter_offset, Rcounters); 2306 2307 // Add invocation counter + backedge counter. 2308 add(iv_be_count, backedge_count, invocation_count); 2309 2310 // Note that this macro must leave the backedge_count + invocation_count in 2311 // register iv_be_count! 2312 BLOCK_COMMENT("} Increment profiling counters"); 2313 } 2314 2315 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { 2316 if (state == atos) { MacroAssembler::verify_oop(reg, FILE_AND_LINE); } 2317 } 2318 2319 // Local helper function for the verify_oop_or_return_address macro. 2320 static bool verify_return_address(Method* m, int bci) { 2321 #ifndef PRODUCT 2322 address pc = (address)(m->constMethod()) + in_bytes(ConstMethod::codes_offset()) + bci; 2323 // Assume it is a valid return address if it is inside m and is preceded by a jsr. 2324 if (!m->contains(pc)) return false; 2325 address jsr_pc; 2326 jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr); 2327 if (*jsr_pc == Bytecodes::_jsr && jsr_pc >= m->code_base()) return true; 2328 jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr_w); 2329 if (*jsr_pc == Bytecodes::_jsr_w && jsr_pc >= m->code_base()) return true; 2330 #endif // PRODUCT 2331 return false; 2332 } 2333 2334 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { 2335 if (VerifyFPU) { 2336 unimplemented("verfiyFPU"); 2337 } 2338 } 2339 2340 void InterpreterMacroAssembler::verify_oop_or_return_address(Register reg, Register Rtmp) { 2341 if (!VerifyOops) return; 2342 2343 // The VM documentation for the astore[_wide] bytecode allows 2344 // the TOS to be not only an oop but also a return address. 2345 Label test; 2346 Label skip; 2347 // See if it is an address (in the current method): 2348 2349 const int log2_bytecode_size_limit = 16; 2350 srdi_(Rtmp, reg, log2_bytecode_size_limit); 2351 bne(CCR0, test); 2352 2353 address fd = CAST_FROM_FN_PTR(address, verify_return_address); 2354 const int nbytes_save = MacroAssembler::num_volatile_regs * 8; 2355 save_volatile_gprs(R1_SP, -nbytes_save); // except R0 2356 save_LR_CR(Rtmp); // Save in old frame. 2357 push_frame_reg_args(nbytes_save, Rtmp); 2358 2359 load_const_optimized(Rtmp, fd, R0); 2360 mr_if_needed(R4_ARG2, reg); 2361 mr(R3_ARG1, R19_method); 2362 call_c(Rtmp); // call C 2363 2364 pop_frame(); 2365 restore_LR_CR(Rtmp); 2366 restore_volatile_gprs(R1_SP, -nbytes_save); // except R0 2367 b(skip); 2368 2369 // Perform a more elaborate out-of-line call. 2370 // Not an address; verify it: 2371 bind(test); 2372 verify_oop(reg); 2373 bind(skip); 2374 } 2375 2376 // Inline assembly for: 2377 // 2378 // if (thread is in interp_only_mode) { 2379 // InterpreterRuntime::post_method_entry(); 2380 // } 2381 // if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY ) || 2382 // *jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY2) ) { 2383 // SharedRuntime::jvmpi_method_entry(method, receiver); 2384 // } 2385 void InterpreterMacroAssembler::notify_method_entry() { 2386 // JVMTI 2387 // Whenever JVMTI puts a thread in interp_only_mode, method 2388 // entry/exit events are sent for that thread to track stack 2389 // depth. If it is possible to enter interp_only_mode we add 2390 // the code to check if the event should be sent. 2391 if (JvmtiExport::can_post_interpreter_events()) { 2392 Label jvmti_post_done; 2393 2394 lwz(R0, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); 2395 cmpwi(CCR0, R0, 0); 2396 beq(CCR0, jvmti_post_done); 2397 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry), 2398 /*check_exceptions=*/true); 2399 2400 bind(jvmti_post_done); 2401 } 2402 } 2403 2404 // Inline assembly for: 2405 // 2406 // if (thread is in interp_only_mode) { 2407 // // save result 2408 // InterpreterRuntime::post_method_exit(); 2409 // // restore result 2410 // } 2411 // if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_EXIT)) { 2412 // // save result 2413 // SharedRuntime::jvmpi_method_exit(); 2414 // // restore result 2415 // } 2416 // 2417 // Native methods have their result stored in d_tmp and l_tmp. 2418 // Java methods have their result stored in the expression stack. 2419 void InterpreterMacroAssembler::notify_method_exit(bool is_native_method, TosState state, 2420 NotifyMethodExitMode mode, bool check_exceptions) { 2421 // JVMTI 2422 // Whenever JVMTI puts a thread in interp_only_mode, method 2423 // entry/exit events are sent for that thread to track stack 2424 // depth. If it is possible to enter interp_only_mode we add 2425 // the code to check if the event should be sent. 2426 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { 2427 Label jvmti_post_done; 2428 2429 lwz(R0, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); 2430 cmpwi(CCR0, R0, 0); 2431 beq(CCR0, jvmti_post_done); 2432 if (!is_native_method) { push(state); } // Expose tos to GC. 2433 call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit), 2434 /*check_exceptions=*/check_exceptions); 2435 if (!is_native_method) { pop(state); } 2436 2437 align(32, 12); 2438 bind(jvmti_post_done); 2439 } 2440 2441 // Dtrace support not implemented. 2442 }