runtime.cpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "incls/_precompiled.incl" 26#include "incls/_runtime.cpp.incl" 27 28 29// For debugging purposes: 30// To force FullGCALot inside a runtime function, add the following two lines 31// 32// Universe::release_fullgc_alot_dummy(); 33// MarkSweep::invoke(0, "Debugging"); 34// 35// At command line specify the parameters: -XX:+FullGCALot -XX:FullGCALotStart=100000000 36 37 38 39 40// Compiled code entry points 41address OptoRuntime::_new_instance_Java = NULL; 42address OptoRuntime::_new_array_Java = NULL; 43address OptoRuntime::_multianewarray2_Java = NULL; 44address OptoRuntime::_multianewarray3_Java = NULL; 45address OptoRuntime::_multianewarray4_Java = NULL; 46address OptoRuntime::_multianewarray5_Java = NULL; 47address OptoRuntime::_g1_wb_pre_Java = NULL; 48address OptoRuntime::_g1_wb_post_Java = NULL; 49address OptoRuntime::_vtable_must_compile_Java = NULL; 50address OptoRuntime::_complete_monitor_locking_Java = NULL; 51address OptoRuntime::_rethrow_Java = NULL; 52 53address OptoRuntime::_slow_arraycopy_Java = NULL; 54address OptoRuntime::_register_finalizer_Java = NULL; 55 56# ifdef ENABLE_ZAP_DEAD_LOCALS 57address OptoRuntime::_zap_dead_Java_locals_Java = NULL; 58address OptoRuntime::_zap_dead_native_locals_Java = NULL; 59# endif 60 61 62// This should be called in an assertion at the start of OptoRuntime routines 63// which are entered from compiled code (all of them) 64#ifndef PRODUCT 65static bool check_compiled_frame(JavaThread* thread) { 66 assert(thread->last_frame().is_runtime_frame(), "cannot call runtime directly from compiled code"); 67#ifdef ASSERT 68 RegisterMap map(thread, false); 69 frame caller = thread->last_frame().sender(&map); 70 assert(caller.is_compiled_frame(), "not being called from compiled like code"); 71#endif /* ASSERT */ 72 return true; 73} 74#endif 75 76 77#define gen(env, var, type_func_gen, c_func, fancy_jump, pass_tls, save_arg_regs, return_pc) \ 78 var = generate_stub(env, type_func_gen, CAST_FROM_FN_PTR(address, c_func), #var, fancy_jump, pass_tls, save_arg_regs, return_pc) 79 80void OptoRuntime::generate(ciEnv* env) { 81 82 generate_exception_blob(); 83 84 // Note: tls: Means fetching the return oop out of the thread-local storage 85 // 86 // variable/name type-function-gen , runtime method ,fncy_jp, tls,save_args,retpc 87 // ------------------------------------------------------------------------------------------------------------------------------- 88 gen(env, _new_instance_Java , new_instance_Type , new_instance_C , 0 , true , false, false); 89 gen(env, _new_array_Java , new_array_Type , new_array_C , 0 , true , false, false); 90 gen(env, _multianewarray2_Java , multianewarray2_Type , multianewarray2_C , 0 , true , false, false); 91 gen(env, _multianewarray3_Java , multianewarray3_Type , multianewarray3_C , 0 , true , false, false); 92 gen(env, _multianewarray4_Java , multianewarray4_Type , multianewarray4_C , 0 , true , false, false); 93 gen(env, _multianewarray5_Java , multianewarray5_Type , multianewarray5_C , 0 , true , false, false); 94 gen(env, _g1_wb_pre_Java , g1_wb_pre_Type , SharedRuntime::g1_wb_pre , 0 , false, false, false); 95 gen(env, _g1_wb_post_Java , g1_wb_post_Type , SharedRuntime::g1_wb_post , 0 , false, false, false); 96 gen(env, _complete_monitor_locking_Java , complete_monitor_enter_Type , SharedRuntime::complete_monitor_locking_C , 0 , false, false, false); 97 gen(env, _rethrow_Java , rethrow_Type , rethrow_C , 2 , true , false, true ); 98 99 gen(env, _slow_arraycopy_Java , slow_arraycopy_Type , SharedRuntime::slow_arraycopy_C , 0 , false, false, false); 100 gen(env, _register_finalizer_Java , register_finalizer_Type , register_finalizer , 0 , false, false, false); 101 102# ifdef ENABLE_ZAP_DEAD_LOCALS 103 gen(env, _zap_dead_Java_locals_Java , zap_dead_locals_Type , zap_dead_Java_locals_C , 0 , false, true , false ); 104 gen(env, _zap_dead_native_locals_Java , zap_dead_locals_Type , zap_dead_native_locals_C , 0 , false, true , false ); 105# endif 106 107} 108 109#undef gen 110 111 112// Helper method to do generation of RunTimeStub's 113address OptoRuntime::generate_stub( ciEnv* env, 114 TypeFunc_generator gen, address C_function, 115 const char *name, int is_fancy_jump, 116 bool pass_tls, 117 bool save_argument_registers, 118 bool return_pc ) { 119 ResourceMark rm; 120 Compile C( env, gen, C_function, name, is_fancy_jump, pass_tls, save_argument_registers, return_pc ); 121 return C.stub_entry_point(); 122} 123 124const char* OptoRuntime::stub_name(address entry) { 125#ifndef PRODUCT 126 CodeBlob* cb = CodeCache::find_blob(entry); 127 RuntimeStub* rs =(RuntimeStub *)cb; 128 assert(rs != NULL && rs->is_runtime_stub(), "not a runtime stub"); 129 return rs->name(); 130#else 131 // Fast implementation for product mode (maybe it should be inlined too) 132 return "runtime stub"; 133#endif 134} 135 136 137//============================================================================= 138// Opto compiler runtime routines 139//============================================================================= 140 141 142//=============================allocation====================================== 143// We failed the fast-path allocation. Now we need to do a scavenge or GC 144// and try allocation again. 145 146void OptoRuntime::new_store_pre_barrier(JavaThread* thread) { 147 // After any safepoint, just before going back to compiled code, 148 // we inform the GC that we will be doing initializing writes to 149 // this object in the future without emitting card-marks, so 150 // GC may take any compensating steps. 151 // NOTE: Keep this code consistent with GraphKit::store_barrier. 152 153 oop new_obj = thread->vm_result(); 154 if (new_obj == NULL) return; 155 156 assert(Universe::heap()->can_elide_tlab_store_barriers(), 157 "compiler must check this first"); 158 // GC may decide to give back a safer copy of new_obj. 159 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj); 160 thread->set_vm_result(new_obj); 161} 162 163// object allocation 164JRT_BLOCK_ENTRY(void, OptoRuntime::new_instance_C(klassOopDesc* klass, JavaThread* thread)) 165 JRT_BLOCK; 166#ifndef PRODUCT 167 SharedRuntime::_new_instance_ctr++; // new instance requires GC 168#endif 169 assert(check_compiled_frame(thread), "incorrect caller"); 170 171 // These checks are cheap to make and support reflective allocation. 172 int lh = Klass::cast(klass)->layout_helper(); 173 if (Klass::layout_helper_needs_slow_path(lh) 174 || !instanceKlass::cast(klass)->is_initialized()) { 175 KlassHandle kh(THREAD, klass); 176 kh->check_valid_for_instantiation(false, THREAD); 177 if (!HAS_PENDING_EXCEPTION) { 178 instanceKlass::cast(kh())->initialize(THREAD); 179 } 180 if (!HAS_PENDING_EXCEPTION) { 181 klass = kh(); 182 } else { 183 klass = NULL; 184 } 185 } 186 187 if (klass != NULL) { 188 // Scavenge and allocate an instance. 189 oop result = instanceKlass::cast(klass)->allocate_instance(THREAD); 190 thread->set_vm_result(result); 191 192 // Pass oops back through thread local storage. Our apparent type to Java 193 // is that we return an oop, but we can block on exit from this routine and 194 // a GC can trash the oop in C's return register. The generated stub will 195 // fetch the oop from TLS after any possible GC. 196 } 197 198 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); 199 JRT_BLOCK_END; 200 201 if (GraphKit::use_ReduceInitialCardMarks()) { 202 // inform GC that we won't do card marks for initializing writes. 203 new_store_pre_barrier(thread); 204 } 205JRT_END 206 207 208// array allocation 209JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_C(klassOopDesc* array_type, int len, JavaThread *thread)) 210 JRT_BLOCK; 211#ifndef PRODUCT 212 SharedRuntime::_new_array_ctr++; // new array requires GC 213#endif 214 assert(check_compiled_frame(thread), "incorrect caller"); 215 216 // Scavenge and allocate an instance. 217 oop result; 218 219 if (Klass::cast(array_type)->oop_is_typeArray()) { 220 // The oopFactory likes to work with the element type. 221 // (We could bypass the oopFactory, since it doesn't add much value.) 222 BasicType elem_type = typeArrayKlass::cast(array_type)->element_type(); 223 result = oopFactory::new_typeArray(elem_type, len, THREAD); 224 } else { 225 // Although the oopFactory likes to work with the elem_type, 226 // the compiler prefers the array_type, since it must already have 227 // that latter value in hand for the fast path. 228 klassOopDesc* elem_type = objArrayKlass::cast(array_type)->element_klass(); 229 result = oopFactory::new_objArray(elem_type, len, THREAD); 230 } 231 232 // Pass oops back through thread local storage. Our apparent type to Java 233 // is that we return an oop, but we can block on exit from this routine and 234 // a GC can trash the oop in C's return register. The generated stub will 235 // fetch the oop from TLS after any possible GC. 236 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); 237 thread->set_vm_result(result); 238 JRT_BLOCK_END; 239 240 if (GraphKit::use_ReduceInitialCardMarks()) { 241 // inform GC that we won't do card marks for initializing writes. 242 new_store_pre_barrier(thread); 243 } 244JRT_END 245 246// Note: multianewarray for one dimension is handled inline by GraphKit::new_array. 247 248// multianewarray for 2 dimensions 249JRT_ENTRY(void, OptoRuntime::multianewarray2_C(klassOopDesc* elem_type, int len1, int len2, JavaThread *thread)) 250#ifndef PRODUCT 251 SharedRuntime::_multi2_ctr++; // multianewarray for 1 dimension 252#endif 253 assert(check_compiled_frame(thread), "incorrect caller"); 254 assert(oop(elem_type)->is_klass(), "not a class"); 255 jint dims[2]; 256 dims[0] = len1; 257 dims[1] = len2; 258 oop obj = arrayKlass::cast(elem_type)->multi_allocate(2, dims, THREAD); 259 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); 260 thread->set_vm_result(obj); 261JRT_END 262 263// multianewarray for 3 dimensions 264JRT_ENTRY(void, OptoRuntime::multianewarray3_C(klassOopDesc* elem_type, int len1, int len2, int len3, JavaThread *thread)) 265#ifndef PRODUCT 266 SharedRuntime::_multi3_ctr++; // multianewarray for 1 dimension 267#endif 268 assert(check_compiled_frame(thread), "incorrect caller"); 269 assert(oop(elem_type)->is_klass(), "not a class"); 270 jint dims[3]; 271 dims[0] = len1; 272 dims[1] = len2; 273 dims[2] = len3; 274 oop obj = arrayKlass::cast(elem_type)->multi_allocate(3, dims, THREAD); 275 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); 276 thread->set_vm_result(obj); 277JRT_END 278 279// multianewarray for 4 dimensions 280JRT_ENTRY(void, OptoRuntime::multianewarray4_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, JavaThread *thread)) 281#ifndef PRODUCT 282 SharedRuntime::_multi4_ctr++; // multianewarray for 1 dimension 283#endif 284 assert(check_compiled_frame(thread), "incorrect caller"); 285 assert(oop(elem_type)->is_klass(), "not a class"); 286 jint dims[4]; 287 dims[0] = len1; 288 dims[1] = len2; 289 dims[2] = len3; 290 dims[3] = len4; 291 oop obj = arrayKlass::cast(elem_type)->multi_allocate(4, dims, THREAD); 292 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); 293 thread->set_vm_result(obj); 294JRT_END 295 296// multianewarray for 5 dimensions 297JRT_ENTRY(void, OptoRuntime::multianewarray5_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, int len5, JavaThread *thread)) 298#ifndef PRODUCT 299 SharedRuntime::_multi5_ctr++; // multianewarray for 1 dimension 300#endif 301 assert(check_compiled_frame(thread), "incorrect caller"); 302 assert(oop(elem_type)->is_klass(), "not a class"); 303 jint dims[5]; 304 dims[0] = len1; 305 dims[1] = len2; 306 dims[2] = len3; 307 dims[3] = len4; 308 dims[4] = len5; 309 oop obj = arrayKlass::cast(elem_type)->multi_allocate(5, dims, THREAD); 310 deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION); 311 thread->set_vm_result(obj); 312JRT_END 313 314const TypeFunc *OptoRuntime::new_instance_Type() { 315 // create input type (domain) 316 const Type **fields = TypeTuple::fields(1); 317 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated 318 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); 319 320 // create result type (range) 321 fields = TypeTuple::fields(1); 322 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop 323 324 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); 325 326 return TypeFunc::make(domain, range); 327} 328 329 330const TypeFunc *OptoRuntime::athrow_Type() { 331 // create input type (domain) 332 const Type **fields = TypeTuple::fields(1); 333 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated 334 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); 335 336 // create result type (range) 337 fields = TypeTuple::fields(0); 338 339 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields); 340 341 return TypeFunc::make(domain, range); 342} 343 344 345const TypeFunc *OptoRuntime::new_array_Type() { 346 // create input type (domain) 347 const Type **fields = TypeTuple::fields(2); 348 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass 349 fields[TypeFunc::Parms+1] = TypeInt::INT; // array size 350 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); 351 352 // create result type (range) 353 fields = TypeTuple::fields(1); 354 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop 355 356 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); 357 358 return TypeFunc::make(domain, range); 359} 360 361const TypeFunc *OptoRuntime::multianewarray_Type(int ndim) { 362 // create input type (domain) 363 const int nargs = ndim + 1; 364 const Type **fields = TypeTuple::fields(nargs); 365 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // element klass 366 for( int i = 1; i < nargs; i++ ) 367 fields[TypeFunc::Parms + i] = TypeInt::INT; // array size 368 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+nargs, fields); 369 370 // create result type (range) 371 fields = TypeTuple::fields(1); 372 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop 373 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); 374 375 return TypeFunc::make(domain, range); 376} 377 378const TypeFunc *OptoRuntime::multianewarray2_Type() { 379 return multianewarray_Type(2); 380} 381 382const TypeFunc *OptoRuntime::multianewarray3_Type() { 383 return multianewarray_Type(3); 384} 385 386const TypeFunc *OptoRuntime::multianewarray4_Type() { 387 return multianewarray_Type(4); 388} 389 390const TypeFunc *OptoRuntime::multianewarray5_Type() { 391 return multianewarray_Type(5); 392} 393 394const TypeFunc *OptoRuntime::g1_wb_pre_Type() { 395 const Type **fields = TypeTuple::fields(2); 396 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // original field value 397 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread 398 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); 399 400 // create result type (range) 401 fields = TypeTuple::fields(0); 402 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields); 403 404 return TypeFunc::make(domain, range); 405} 406 407const TypeFunc *OptoRuntime::g1_wb_post_Type() { 408 409 const Type **fields = TypeTuple::fields(2); 410 fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Card addr 411 fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread 412 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); 413 414 // create result type (range) 415 fields = TypeTuple::fields(0); 416 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); 417 418 return TypeFunc::make(domain, range); 419} 420 421const TypeFunc *OptoRuntime::uncommon_trap_Type() { 422 // create input type (domain) 423 const Type **fields = TypeTuple::fields(1); 424 // symbolOop name of class to be loaded 425 fields[TypeFunc::Parms+0] = TypeInt::INT; 426 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); 427 428 // create result type (range) 429 fields = TypeTuple::fields(0); 430 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields); 431 432 return TypeFunc::make(domain, range); 433} 434 435# ifdef ENABLE_ZAP_DEAD_LOCALS 436// Type used for stub generation for zap_dead_locals. 437// No inputs or outputs 438const TypeFunc *OptoRuntime::zap_dead_locals_Type() { 439 // create input type (domain) 440 const Type **fields = TypeTuple::fields(0); 441 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms,fields); 442 443 // create result type (range) 444 fields = TypeTuple::fields(0); 445 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms,fields); 446 447 return TypeFunc::make(domain,range); 448} 449# endif 450 451 452//----------------------------------------------------------------------------- 453// Monitor Handling 454const TypeFunc *OptoRuntime::complete_monitor_enter_Type() { 455 // create input type (domain) 456 const Type **fields = TypeTuple::fields(2); 457 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked 458 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock 459 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); 460 461 // create result type (range) 462 fields = TypeTuple::fields(0); 463 464 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); 465 466 return TypeFunc::make(domain,range); 467} 468 469 470//----------------------------------------------------------------------------- 471const TypeFunc *OptoRuntime::complete_monitor_exit_Type() { 472 // create input type (domain) 473 const Type **fields = TypeTuple::fields(2); 474 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Object to be Locked 475 fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM; // Address of stack location for lock 476 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); 477 478 // create result type (range) 479 fields = TypeTuple::fields(0); 480 481 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); 482 483 return TypeFunc::make(domain,range); 484} 485 486const TypeFunc* OptoRuntime::flush_windows_Type() { 487 // create input type (domain) 488 const Type** fields = TypeTuple::fields(1); 489 fields[TypeFunc::Parms+0] = NULL; // void 490 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms, fields); 491 492 // create result type 493 fields = TypeTuple::fields(1); 494 fields[TypeFunc::Parms+0] = NULL; // void 495 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); 496 497 return TypeFunc::make(domain, range); 498} 499 500const TypeFunc* OptoRuntime::l2f_Type() { 501 // create input type (domain) 502 const Type **fields = TypeTuple::fields(2); 503 fields[TypeFunc::Parms+0] = TypeLong::LONG; 504 fields[TypeFunc::Parms+1] = Type::HALF; 505 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); 506 507 // create result type (range) 508 fields = TypeTuple::fields(1); 509 fields[TypeFunc::Parms+0] = Type::FLOAT; 510 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); 511 512 return TypeFunc::make(domain, range); 513} 514 515const TypeFunc* OptoRuntime::modf_Type() { 516 const Type **fields = TypeTuple::fields(2); 517 fields[TypeFunc::Parms+0] = Type::FLOAT; 518 fields[TypeFunc::Parms+1] = Type::FLOAT; 519 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); 520 521 // create result type (range) 522 fields = TypeTuple::fields(1); 523 fields[TypeFunc::Parms+0] = Type::FLOAT; 524 525 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); 526 527 return TypeFunc::make(domain, range); 528} 529 530const TypeFunc *OptoRuntime::Math_D_D_Type() { 531 // create input type (domain) 532 const Type **fields = TypeTuple::fields(2); 533 // symbolOop name of class to be loaded 534 fields[TypeFunc::Parms+0] = Type::DOUBLE; 535 fields[TypeFunc::Parms+1] = Type::HALF; 536 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); 537 538 // create result type (range) 539 fields = TypeTuple::fields(2); 540 fields[TypeFunc::Parms+0] = Type::DOUBLE; 541 fields[TypeFunc::Parms+1] = Type::HALF; 542 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields); 543 544 return TypeFunc::make(domain, range); 545} 546 547const TypeFunc* OptoRuntime::Math_DD_D_Type() { 548 const Type **fields = TypeTuple::fields(4); 549 fields[TypeFunc::Parms+0] = Type::DOUBLE; 550 fields[TypeFunc::Parms+1] = Type::HALF; 551 fields[TypeFunc::Parms+2] = Type::DOUBLE; 552 fields[TypeFunc::Parms+3] = Type::HALF; 553 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+4, fields); 554 555 // create result type (range) 556 fields = TypeTuple::fields(2); 557 fields[TypeFunc::Parms+0] = Type::DOUBLE; 558 fields[TypeFunc::Parms+1] = Type::HALF; 559 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields); 560 561 return TypeFunc::make(domain, range); 562} 563 564//-------------- currentTimeMillis 565 566const TypeFunc* OptoRuntime::current_time_millis_Type() { 567 // create input type (domain) 568 const Type **fields = TypeTuple::fields(0); 569 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+0, fields); 570 571 // create result type (range) 572 fields = TypeTuple::fields(2); 573 fields[TypeFunc::Parms+0] = TypeLong::LONG; 574 fields[TypeFunc::Parms+1] = Type::HALF; 575 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields); 576 577 return TypeFunc::make(domain, range); 578} 579 580// arraycopy stub variations: 581enum ArrayCopyType { 582 ac_fast, // void(ptr, ptr, size_t) 583 ac_checkcast, // int(ptr, ptr, size_t, size_t, ptr) 584 ac_slow, // void(ptr, int, ptr, int, int) 585 ac_generic // int(ptr, int, ptr, int, int) 586}; 587 588static const TypeFunc* make_arraycopy_Type(ArrayCopyType act) { 589 // create input type (domain) 590 int num_args = (act == ac_fast ? 3 : 5); 591 int num_size_args = (act == ac_fast ? 1 : act == ac_checkcast ? 2 : 0); 592 int argcnt = num_args; 593 LP64_ONLY(argcnt += num_size_args); // halfwords for lengths 594 const Type** fields = TypeTuple::fields(argcnt); 595 int argp = TypeFunc::Parms; 596 fields[argp++] = TypePtr::NOTNULL; // src 597 if (num_size_args == 0) { 598 fields[argp++] = TypeInt::INT; // src_pos 599 } 600 fields[argp++] = TypePtr::NOTNULL; // dest 601 if (num_size_args == 0) { 602 fields[argp++] = TypeInt::INT; // dest_pos 603 fields[argp++] = TypeInt::INT; // length 604 } 605 while (num_size_args-- > 0) { 606 fields[argp++] = TypeX_X; // size in whatevers (size_t) 607 LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length 608 } 609 if (act == ac_checkcast) { 610 fields[argp++] = TypePtr::NOTNULL; // super_klass 611 } 612 assert(argp == TypeFunc::Parms+argcnt, "correct decoding of act"); 613 const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields); 614 615 // create result type if needed 616 int retcnt = (act == ac_checkcast || act == ac_generic ? 1 : 0); 617 fields = TypeTuple::fields(1); 618 if (retcnt == 0) 619 fields[TypeFunc::Parms+0] = NULL; // void 620 else 621 fields[TypeFunc::Parms+0] = TypeInt::INT; // status result, if needed 622 const TypeTuple* range = TypeTuple::make(TypeFunc::Parms+retcnt, fields); 623 return TypeFunc::make(domain, range); 624} 625 626const TypeFunc* OptoRuntime::fast_arraycopy_Type() { 627 // This signature is simple: Two base pointers and a size_t. 628 return make_arraycopy_Type(ac_fast); 629} 630 631const TypeFunc* OptoRuntime::checkcast_arraycopy_Type() { 632 // An extension of fast_arraycopy_Type which adds type checking. 633 return make_arraycopy_Type(ac_checkcast); 634} 635 636const TypeFunc* OptoRuntime::slow_arraycopy_Type() { 637 // This signature is exactly the same as System.arraycopy. 638 // There are no intptr_t (int/long) arguments. 639 return make_arraycopy_Type(ac_slow); 640} 641 642const TypeFunc* OptoRuntime::generic_arraycopy_Type() { 643 // This signature is like System.arraycopy, except that it returns status. 644 return make_arraycopy_Type(ac_generic); 645} 646 647 648//------------- Interpreter state access for on stack replacement 649const TypeFunc* OptoRuntime::osr_end_Type() { 650 // create input type (domain) 651 const Type **fields = TypeTuple::fields(1); 652 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // OSR temp buf 653 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields); 654 655 // create result type 656 fields = TypeTuple::fields(1); 657 // fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // locked oop 658 fields[TypeFunc::Parms+0] = NULL; // void 659 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); 660 return TypeFunc::make(domain, range); 661} 662 663//-------------- methodData update helpers 664 665const TypeFunc* OptoRuntime::profile_receiver_type_Type() { 666 // create input type (domain) 667 const Type **fields = TypeTuple::fields(2); 668 fields[TypeFunc::Parms+0] = TypeAryPtr::NOTNULL; // methodData pointer 669 fields[TypeFunc::Parms+1] = TypeInstPtr::BOTTOM; // receiver oop 670 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields); 671 672 // create result type 673 fields = TypeTuple::fields(1); 674 fields[TypeFunc::Parms+0] = NULL; // void 675 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields); 676 return TypeFunc::make(domain,range); 677} 678 679JRT_LEAF(void, OptoRuntime::profile_receiver_type_C(DataLayout* data, oopDesc* receiver)) 680 if (receiver == NULL) return; 681 klassOop receiver_klass = receiver->klass(); 682 683 intptr_t* mdp = ((intptr_t*)(data)) + DataLayout::header_size_in_cells(); 684 int empty_row = -1; // free row, if any is encountered 685 686 // ReceiverTypeData* vc = new ReceiverTypeData(mdp); 687 for (uint row = 0; row < ReceiverTypeData::row_limit(); row++) { 688 // if (vc->receiver(row) == receiver_klass) 689 int receiver_off = ReceiverTypeData::receiver_cell_index(row); 690 intptr_t row_recv = *(mdp + receiver_off); 691 if (row_recv == (intptr_t) receiver_klass) { 692 // vc->set_receiver_count(row, vc->receiver_count(row) + DataLayout::counter_increment); 693 int count_off = ReceiverTypeData::receiver_count_cell_index(row); 694 *(mdp + count_off) += DataLayout::counter_increment; 695 return; 696 } else if (row_recv == 0) { 697 // else if (vc->receiver(row) == NULL) 698 empty_row = (int) row; 699 } 700 } 701 702 if (empty_row != -1) { 703 int receiver_off = ReceiverTypeData::receiver_cell_index(empty_row); 704 // vc->set_receiver(empty_row, receiver_klass); 705 *(mdp + receiver_off) = (intptr_t) receiver_klass; 706 // vc->set_receiver_count(empty_row, DataLayout::counter_increment); 707 int count_off = ReceiverTypeData::receiver_count_cell_index(empty_row); 708 *(mdp + count_off) = DataLayout::counter_increment; 709 } else { 710 // Receiver did not match any saved receiver and there is no empty row for it. 711 // Increment total counter to indicate polymorphic case. 712 intptr_t* count_p = (intptr_t*)(((byte*)(data)) + in_bytes(CounterData::count_offset())); 713 *count_p += DataLayout::counter_increment; 714 } 715JRT_END 716 717//----------------------------------------------------------------------------- 718// implicit exception support. 719 720static void report_null_exception_in_code_cache(address exception_pc) { 721 ResourceMark rm; 722 CodeBlob* n = CodeCache::find_blob(exception_pc); 723 if (n != NULL) { 724 tty->print_cr("#"); 725 tty->print_cr("# HotSpot Runtime Error, null exception in generated code"); 726 tty->print_cr("#"); 727 tty->print_cr("# pc where exception happened = " INTPTR_FORMAT, exception_pc); 728 729 if (n->is_nmethod()) { 730 methodOop method = ((nmethod*)n)->method(); 731 tty->print_cr("# Method where it happened %s.%s ", Klass::cast(method->method_holder())->name()->as_C_string(), method->name()->as_C_string()); 732 tty->print_cr("#"); 733 if (ShowMessageBoxOnError && UpdateHotSpotCompilerFileOnError) { 734 const char* title = "HotSpot Runtime Error"; 735 const char* question = "Do you want to exclude compilation of this method in future runs?"; 736 if (os::message_box(title, question)) { 737 CompilerOracle::append_comment_to_file(""); 738 CompilerOracle::append_comment_to_file("Null exception in compiled code resulted in the following exclude"); 739 CompilerOracle::append_comment_to_file(""); 740 CompilerOracle::append_exclude_to_file(method); 741 tty->print_cr("#"); 742 tty->print_cr("# %s has been updated to exclude the specified method", CompileCommandFile); 743 tty->print_cr("#"); 744 } 745 } 746 fatal("Implicit null exception happened in compiled method"); 747 } else { 748 n->print(); 749 fatal("Implicit null exception happened in generated stub"); 750 } 751 } 752 fatal("Implicit null exception at wrong place"); 753} 754 755 756//------------------------------------------------------------------------------------- 757// register policy 758 759bool OptoRuntime::is_callee_saved_register(MachRegisterNumbers reg) { 760 assert(reg >= 0 && reg < _last_Mach_Reg, "must be a machine register"); 761 switch (register_save_policy[reg]) { 762 case 'C': return false; //SOC 763 case 'E': return true ; //SOE 764 case 'N': return false; //NS 765 case 'A': return false; //AS 766 } 767 ShouldNotReachHere(); 768 return false; 769} 770 771//----------------------------------------------------------------------- 772// Exceptions 773// 774 775static void trace_exception(oop exception_oop, address exception_pc, const char* msg) PRODUCT_RETURN; 776 777// The method is an entry that is always called by a C++ method not 778// directly from compiled code. Compiled code will call the C++ method following. 779// We can't allow async exception to be installed during exception processing. 780JRT_ENTRY_NO_ASYNC(address, OptoRuntime::handle_exception_C_helper(JavaThread* thread, nmethod* &nm)) 781 782 // Do not confuse exception_oop with pending_exception. The exception_oop 783 // is only used to pass arguments into the method. Not for general 784 // exception handling. DO NOT CHANGE IT to use pending_exception, since 785 // the runtime stubs checks this on exit. 786 assert(thread->exception_oop() != NULL, "exception oop is found"); 787 address handler_address = NULL; 788 789 Handle exception(thread, thread->exception_oop()); 790 791 if (TraceExceptions) { 792 trace_exception(exception(), thread->exception_pc(), ""); 793 } 794 // for AbortVMOnException flag 795 NOT_PRODUCT(Exceptions::debug_check_abort(exception)); 796 797 #ifdef ASSERT 798 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { 799 // should throw an exception here 800 ShouldNotReachHere(); 801 } 802 #endif 803 804 805 // new exception handling: this method is entered only from adapters 806 // exceptions from compiled java methods are handled in compiled code 807 // using rethrow node 808 809 address pc = thread->exception_pc(); 810 nm = CodeCache::find_nmethod(pc); 811 assert(nm != NULL, "No NMethod found"); 812 if (nm->is_native_method()) { 813 fatal("Native mathod should not have path to exception handling"); 814 } else { 815 // we are switching to old paradigm: search for exception handler in caller_frame 816 // instead in exception handler of caller_frame.sender() 817 818 if (JvmtiExport::can_post_on_exceptions()) { 819 // "Full-speed catching" is not necessary here, 820 // since we're notifying the VM on every catch. 821 // Force deoptimization and the rest of the lookup 822 // will be fine. 823 deoptimize_caller_frame(thread, true); 824 } 825 826 // Check the stack guard pages. If enabled, look for handler in this frame; 827 // otherwise, forcibly unwind the frame. 828 // 829 // 4826555: use default current sp for reguard_stack instead of &nm: it's more accurate. 830 bool force_unwind = !thread->reguard_stack(); 831 bool deopting = false; 832 if (nm->is_deopt_pc(pc)) { 833 deopting = true; 834 RegisterMap map(thread, false); 835 frame deoptee = thread->last_frame().sender(&map); 836 assert(deoptee.is_deoptimized_frame(), "must be deopted"); 837 // Adjust the pc back to the original throwing pc 838 pc = deoptee.pc(); 839 } 840 841 // If we are forcing an unwind because of stack overflow then deopt is 842 // irrelevant sice we are throwing the frame away anyway. 843 844 if (deopting && !force_unwind) { 845 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception(); 846 } else { 847 848 handler_address = 849 force_unwind ? NULL : nm->handler_for_exception_and_pc(exception, pc); 850 851 if (handler_address == NULL) { 852 handler_address = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true); 853 assert (handler_address != NULL, "must have compiled handler"); 854 // Update the exception cache only when the unwind was not forced. 855 if (!force_unwind) { 856 nm->add_handler_for_exception_and_pc(exception,pc,handler_address); 857 } 858 } else { 859 assert(handler_address == SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true), "Must be the same"); 860 } 861 } 862 863 thread->set_exception_pc(pc); 864 thread->set_exception_handler_pc(handler_address); 865 thread->set_exception_stack_size(0); 866 867 // Check if the exception PC is a MethodHandle call site. 868 thread->set_is_method_handle_return(nm->is_method_handle_return(pc)); 869 } 870 871 // Restore correct return pc. Was saved above. 872 thread->set_exception_oop(exception()); 873 return handler_address; 874 875JRT_END 876 877// We are entering here from exception_blob 878// If there is a compiled exception handler in this method, we will continue there; 879// otherwise we will unwind the stack and continue at the caller of top frame method 880// Note we enter without the usual JRT wrapper. We will call a helper routine that 881// will do the normal VM entry. We do it this way so that we can see if the nmethod 882// we looked up the handler for has been deoptimized in the meantime. If it has been 883// we must not use the handler and instread return the deopt blob. 884address OptoRuntime::handle_exception_C(JavaThread* thread) { 885// 886// We are in Java not VM and in debug mode we have a NoHandleMark 887// 888#ifndef PRODUCT 889 SharedRuntime::_find_handler_ctr++; // find exception handler 890#endif 891 debug_only(NoHandleMark __hm;) 892 nmethod* nm = NULL; 893 address handler_address = NULL; 894 { 895 // Enter the VM 896 897 ResetNoHandleMark rnhm; 898 handler_address = handle_exception_C_helper(thread, nm); 899 } 900 901 // Back in java: Use no oops, DON'T safepoint 902 903 // Now check to see if the handler we are returning is in a now 904 // deoptimized frame 905 906 if (nm != NULL) { 907 RegisterMap map(thread, false); 908 frame caller = thread->last_frame().sender(&map); 909#ifdef ASSERT 910 assert(caller.is_compiled_frame(), "must be"); 911#endif // ASSERT 912 if (caller.is_deoptimized_frame()) { 913 handler_address = SharedRuntime::deopt_blob()->unpack_with_exception(); 914 } 915 } 916 return handler_address; 917} 918 919//------------------------------rethrow---------------------------------------- 920// We get here after compiled code has executed a 'RethrowNode'. The callee 921// is either throwing or rethrowing an exception. The callee-save registers 922// have been restored, synchronized objects have been unlocked and the callee 923// stack frame has been removed. The return address was passed in. 924// Exception oop is passed as the 1st argument. This routine is then called 925// from the stub. On exit, we know where to jump in the caller's code. 926// After this C code exits, the stub will pop his frame and end in a jump 927// (instead of a return). We enter the caller's default handler. 928// 929// This must be JRT_LEAF: 930// - caller will not change its state as we cannot block on exit, 931// therefore raw_exception_handler_for_return_address is all it takes 932// to handle deoptimized blobs 933// 934// However, there needs to be a safepoint check in the middle! So compiled 935// safepoints are completely watertight. 936// 937// Thus, it cannot be a leaf since it contains the No_GC_Verifier. 938// 939// *THIS IS NOT RECOMMENDED PROGRAMMING STYLE* 940// 941address OptoRuntime::rethrow_C(oopDesc* exception, JavaThread* thread, address ret_pc) { 942#ifndef PRODUCT 943 SharedRuntime::_rethrow_ctr++; // count rethrows 944#endif 945 assert (exception != NULL, "should have thrown a NULLPointerException"); 946#ifdef ASSERT 947 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) { 948 // should throw an exception here 949 ShouldNotReachHere(); 950 } 951#endif 952 953 thread->set_vm_result(exception); 954 // Frame not compiled (handles deoptimization blob) 955 return SharedRuntime::raw_exception_handler_for_return_address(thread, ret_pc); 956} 957 958 959const TypeFunc *OptoRuntime::rethrow_Type() { 960 // create input type (domain) 961 const Type **fields = TypeTuple::fields(1); 962 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop 963 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields); 964 965 // create result type (range) 966 fields = TypeTuple::fields(1); 967 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop 968 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields); 969 970 return TypeFunc::make(domain, range); 971} 972 973 974void OptoRuntime::deoptimize_caller_frame(JavaThread *thread, bool doit) { 975 // Deoptimize frame 976 if (doit) { 977 // Called from within the owner thread, so no need for safepoint 978 RegisterMap reg_map(thread); 979 frame stub_frame = thread->last_frame(); 980 assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check"); 981 frame caller_frame = stub_frame.sender(®_map); 982 983 // bypass VM_DeoptimizeFrame and deoptimize the frame directly 984 Deoptimization::deoptimize_frame(thread, caller_frame.id()); 985 } 986} 987 988 989const TypeFunc *OptoRuntime::register_finalizer_Type() { 990 // create input type (domain) 991 const Type **fields = TypeTuple::fields(1); 992 fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // oop; Receiver 993 // // The JavaThread* is passed to each routine as the last argument 994 // fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // JavaThread *; Executing thread 995 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields); 996 997 // create result type (range) 998 fields = TypeTuple::fields(0); 999 1000 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); 1001 1002 return TypeFunc::make(domain,range); 1003} 1004 1005 1006//----------------------------------------------------------------------------- 1007// Dtrace support. entry and exit probes have the same signature 1008const TypeFunc *OptoRuntime::dtrace_method_entry_exit_Type() { 1009 // create input type (domain) 1010 const Type **fields = TypeTuple::fields(2); 1011 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage 1012 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // methodOop; Method we are entering 1013 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); 1014 1015 // create result type (range) 1016 fields = TypeTuple::fields(0); 1017 1018 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); 1019 1020 return TypeFunc::make(domain,range); 1021} 1022 1023const TypeFunc *OptoRuntime::dtrace_object_alloc_Type() { 1024 // create input type (domain) 1025 const Type **fields = TypeTuple::fields(2); 1026 fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage 1027 fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL; // oop; newly allocated object 1028 1029 const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields); 1030 1031 // create result type (range) 1032 fields = TypeTuple::fields(0); 1033 1034 const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields); 1035 1036 return TypeFunc::make(domain,range); 1037} 1038 1039 1040JRT_ENTRY_NO_ASYNC(void, OptoRuntime::register_finalizer(oopDesc* obj, JavaThread* thread)) 1041 assert(obj->is_oop(), "must be a valid oop"); 1042 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); 1043 instanceKlass::register_finalizer(instanceOop(obj), CHECK); 1044JRT_END 1045 1046//----------------------------------------------------------------------------- 1047 1048NamedCounter * volatile OptoRuntime::_named_counters = NULL; 1049 1050// 1051// dump the collected NamedCounters. 1052// 1053void OptoRuntime::print_named_counters() { 1054 int total_lock_count = 0; 1055 int eliminated_lock_count = 0; 1056 1057 NamedCounter* c = _named_counters; 1058 while (c) { 1059 if (c->tag() == NamedCounter::LockCounter || c->tag() == NamedCounter::EliminatedLockCounter) { 1060 int count = c->count(); 1061 if (count > 0) { 1062 bool eliminated = c->tag() == NamedCounter::EliminatedLockCounter; 1063 if (Verbose) { 1064 tty->print_cr("%d %s%s", count, c->name(), eliminated ? " (eliminated)" : ""); 1065 } 1066 total_lock_count += count; 1067 if (eliminated) { 1068 eliminated_lock_count += count; 1069 } 1070 } 1071 } else if (c->tag() == NamedCounter::BiasedLockingCounter) { 1072 BiasedLockingCounters* blc = ((BiasedLockingNamedCounter*)c)->counters(); 1073 if (blc->nonzero()) { 1074 tty->print_cr("%s", c->name()); 1075 blc->print_on(tty); 1076 } 1077 } 1078 c = c->next(); 1079 } 1080 if (total_lock_count > 0) { 1081 tty->print_cr("dynamic locks: %d", total_lock_count); 1082 if (eliminated_lock_count) { 1083 tty->print_cr("eliminated locks: %d (%d%%)", eliminated_lock_count, 1084 (int)(eliminated_lock_count * 100.0 / total_lock_count)); 1085 } 1086 } 1087} 1088 1089// 1090// Allocate a new NamedCounter. The JVMState is used to generate the 1091// name which consists of method@line for the inlining tree. 1092// 1093 1094NamedCounter* OptoRuntime::new_named_counter(JVMState* youngest_jvms, NamedCounter::CounterTag tag) { 1095 int max_depth = youngest_jvms->depth(); 1096 1097 // Visit scopes from youngest to oldest. 1098 bool first = true; 1099 stringStream st; 1100 for (int depth = max_depth; depth >= 1; depth--) { 1101 JVMState* jvms = youngest_jvms->of_depth(depth); 1102 ciMethod* m = jvms->has_method() ? jvms->method() : NULL; 1103 if (!first) { 1104 st.print(" "); 1105 } else { 1106 first = false; 1107 } 1108 int bci = jvms->bci(); 1109 if (bci < 0) bci = 0; 1110 st.print("%s.%s@%d", m->holder()->name()->as_utf8(), m->name()->as_utf8(), bci); 1111 // To print linenumbers instead of bci use: m->line_number_from_bci(bci) 1112 } 1113 NamedCounter* c; 1114 if (tag == NamedCounter::BiasedLockingCounter) { 1115 c = new BiasedLockingNamedCounter(strdup(st.as_string())); 1116 } else { 1117 c = new NamedCounter(strdup(st.as_string()), tag); 1118 } 1119 1120 // atomically add the new counter to the head of the list. We only 1121 // add counters so this is safe. 1122 NamedCounter* head; 1123 do { 1124 head = _named_counters; 1125 c->set_next(head); 1126 } while (Atomic::cmpxchg_ptr(c, &_named_counters, head) != head); 1127 return c; 1128} 1129 1130//----------------------------------------------------------------------------- 1131// Non-product code 1132#ifndef PRODUCT 1133 1134int trace_exception_counter = 0; 1135static void trace_exception(oop exception_oop, address exception_pc, const char* msg) { 1136 ttyLocker ttyl; 1137 trace_exception_counter++; 1138 tty->print("%d [Exception (%s): ", trace_exception_counter, msg); 1139 exception_oop->print_value(); 1140 tty->print(" in "); 1141 CodeBlob* blob = CodeCache::find_blob(exception_pc); 1142 if (blob->is_nmethod()) { 1143 ((nmethod*)blob)->method()->print_value(); 1144 } else if (blob->is_runtime_stub()) { 1145 tty->print("<runtime-stub>"); 1146 } else { 1147 tty->print("<unknown>"); 1148 } 1149 tty->print(" at " INTPTR_FORMAT, exception_pc); 1150 tty->print_cr("]"); 1151} 1152 1153#endif // PRODUCT 1154 1155 1156# ifdef ENABLE_ZAP_DEAD_LOCALS 1157// Called from call sites in compiled code with oop maps (actually safepoints) 1158// Zaps dead locals in first java frame. 1159// Is entry because may need to lock to generate oop maps 1160// Currently, only used for compiler frames, but someday may be used 1161// for interpreter frames, too. 1162 1163int OptoRuntime::ZapDeadCompiledLocals_count = 0; 1164 1165// avoid pointers to member funcs with these helpers 1166static bool is_java_frame( frame* f) { return f->is_java_frame(); } 1167static bool is_native_frame(frame* f) { return f->is_native_frame(); } 1168 1169 1170void OptoRuntime::zap_dead_java_or_native_locals(JavaThread* thread, 1171 bool (*is_this_the_right_frame_to_zap)(frame*)) { 1172 assert(JavaThread::current() == thread, "is this needed?"); 1173 1174 if ( !ZapDeadCompiledLocals ) return; 1175 1176 bool skip = false; 1177 1178 if ( ZapDeadCompiledLocalsFirst == 0 ) ; // nothing special 1179 else if ( ZapDeadCompiledLocalsFirst > ZapDeadCompiledLocals_count ) skip = true; 1180 else if ( ZapDeadCompiledLocalsFirst == ZapDeadCompiledLocals_count ) 1181 warning("starting zapping after skipping"); 1182 1183 if ( ZapDeadCompiledLocalsLast == -1 ) ; // nothing special 1184 else if ( ZapDeadCompiledLocalsLast < ZapDeadCompiledLocals_count ) skip = true; 1185 else if ( ZapDeadCompiledLocalsLast == ZapDeadCompiledLocals_count ) 1186 warning("about to zap last zap"); 1187 1188 ++ZapDeadCompiledLocals_count; // counts skipped zaps, too 1189 1190 if ( skip ) return; 1191 1192 // find java frame and zap it 1193 1194 for (StackFrameStream sfs(thread); !sfs.is_done(); sfs.next()) { 1195 if (is_this_the_right_frame_to_zap(sfs.current()) ) { 1196 sfs.current()->zap_dead_locals(thread, sfs.register_map()); 1197 return; 1198 } 1199 } 1200 warning("no frame found to zap in zap_dead_Java_locals_C"); 1201} 1202 1203JRT_LEAF(void, OptoRuntime::zap_dead_Java_locals_C(JavaThread* thread)) 1204 zap_dead_java_or_native_locals(thread, is_java_frame); 1205JRT_END 1206 1207// The following does not work because for one thing, the 1208// thread state is wrong; it expects java, but it is native. 1209// Also, the invariants in a native stub are different and 1210// I'm not sure it is safe to have a MachCalRuntimeDirectNode 1211// in there. 1212// So for now, we do not zap in native stubs. 1213 1214JRT_LEAF(void, OptoRuntime::zap_dead_native_locals_C(JavaThread* thread)) 1215 zap_dead_java_or_native_locals(thread, is_native_frame); 1216JRT_END 1217 1218# endif 1219