1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "interpreter/interpreter.hpp" 27 #include "memory/resourceArea.hpp" 28 #include "memory/universe.hpp" 29 #include "oops/markWord.hpp" 30 #include "oops/method.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "prims/methodHandles.hpp" 33 #include "runtime/frame.inline.hpp" 34 #include "runtime/handles.inline.hpp" 35 #include "runtime/javaCalls.hpp" 36 #include "runtime/monitorChunk.hpp" 37 #include "runtime/os.inline.hpp" 38 #include "runtime/signature.hpp" 39 #include "runtime/stubCodeGenerator.hpp" 40 #include "runtime/stubRoutines.hpp" 41 #include "vmreg_x86.inline.hpp" 42 #ifdef COMPILER1 43 #include "c1/c1_Runtime1.hpp" 44 #include "runtime/vframeArray.hpp" 45 #endif 46 47 #ifdef ASSERT 48 void RegisterMap::check_location_valid() { 49 } 50 #endif 51 52 // Profiling/safepoint support 53 54 bool frame::safe_for_sender(JavaThread *thread) { 55 address sp = (address)_sp; 56 address fp = (address)_fp; 57 address unextended_sp = (address)_unextended_sp; 58 59 // consider stack guards when trying to determine "safe" stack pointers 60 static size_t stack_guard_size = os::uses_stack_guard_pages() ? 61 JavaThread::stack_red_zone_size() + JavaThread::stack_yellow_zone_size() : 0; 62 size_t usable_stack_size = thread->stack_size() - stack_guard_size; 63 64 // sp must be within the usable part of the stack (not in guards) 65 bool sp_safe = (sp < thread->stack_base()) && 66 (sp >= thread->stack_base() - usable_stack_size); 67 68 69 if (!sp_safe) { 70 return false; 71 } 72 73 // unextended sp must be within the stack and above or equal sp 74 bool unextended_sp_safe = (unextended_sp < thread->stack_base()) && 75 (unextended_sp >= sp); 76 77 if (!unextended_sp_safe) { 78 return false; 79 } 80 81 // an fp must be within the stack and above (but not equal) sp 82 // second evaluation on fp+ is added to handle situation where fp is -1 83 bool fp_safe = (fp < thread->stack_base() && (fp > sp) && (((fp + (return_addr_offset * sizeof(void*))) < thread->stack_base()))); 84 85 // We know sp/unextended_sp are safe only fp is questionable here 86 87 // If the current frame is known to the code cache then we can attempt to 88 // to construct the sender and do some validation of it. This goes a long way 89 // toward eliminating issues when we get in frame construction code 90 91 if (_cb != NULL ) { 92 93 // First check if frame is complete and tester is reliable 94 // Unfortunately we can only check frame complete for runtime stubs and nmethod 95 // other generic buffer blobs are more problematic so we just assume they are 96 // ok. adapter blobs never have a frame complete and are never ok. 97 98 if (!_cb->is_frame_complete_at(_pc)) { 99 if (_cb->is_compiled() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { 100 return false; 101 } 102 } 103 104 // Could just be some random pointer within the codeBlob 105 if (!_cb->code_contains(_pc)) { 106 return false; 107 } 108 109 // Entry frame checks 110 if (is_entry_frame()) { 111 // an entry frame must have a valid fp. 112 return fp_safe && is_entry_frame_valid(thread); 113 } 114 115 intptr_t* sender_sp = NULL; 116 intptr_t* sender_unextended_sp = NULL; 117 address sender_pc = NULL; 118 intptr_t* saved_fp = NULL; 119 120 if (is_interpreted_frame()) { 121 // fp must be safe 122 if (!fp_safe) { 123 return false; 124 } 125 126 sender_pc = (address) this->fp()[return_addr_offset]; 127 // for interpreted frames, the value below is the sender "raw" sp, 128 // which can be different from the sender unextended sp (the sp seen 129 // by the sender) because of current frame local variables 130 sender_sp = (intptr_t*) addr_at(sender_sp_offset); 131 sender_unextended_sp = (intptr_t*) this->fp()[interpreter_frame_sender_sp_offset]; 132 saved_fp = (intptr_t*) this->fp()[link_offset]; 133 134 } else { 135 // must be some sort of compiled/runtime frame 136 // fp does not have to be safe (although it could be check for c1?) 137 138 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc 139 if (_cb->frame_size() <= 0) { 140 return false; 141 } 142 143 sender_sp = _unextended_sp + _cb->frame_size(); 144 // Is sender_sp safe? 145 if ((address)sender_sp >= thread->stack_base()) { 146 return false; 147 } 148 sender_unextended_sp = sender_sp; 149 // On Intel the return_address is always the word on the stack 150 sender_pc = (address) *(sender_sp-1); 151 // Note: frame::sender_sp_offset is only valid for compiled frame 152 saved_fp = (intptr_t*) *(sender_sp - frame::sender_sp_offset); 153 } 154 155 156 // If the potential sender is the interpreter then we can do some more checking 157 if (Interpreter::contains(sender_pc)) { 158 159 // ebp is always saved in a recognizable place in any code we generate. However 160 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp 161 // is really a frame pointer. 162 163 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); 164 165 if (!saved_fp_safe) { 166 return false; 167 } 168 169 // construct the potential sender 170 171 frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc); 172 173 return sender.is_interpreted_frame_valid(thread); 174 175 } 176 177 // We must always be able to find a recognizable pc 178 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); 179 if (sender_pc == NULL || sender_blob == NULL) { 180 return false; 181 } 182 183 // Could be a zombie method 184 if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { 185 return false; 186 } 187 188 // Could just be some random pointer within the codeBlob 189 if (!sender_blob->code_contains(sender_pc)) { 190 return false; 191 } 192 193 // We should never be able to see an adapter if the current frame is something from code cache 194 if (sender_blob->is_adapter_blob()) { 195 return false; 196 } 197 198 // Could be the call_stub 199 if (StubRoutines::returns_to_call_stub(sender_pc)) { 200 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); 201 202 if (!saved_fp_safe) { 203 return false; 204 } 205 206 // construct the potential sender 207 208 frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc); 209 210 // Validate the JavaCallWrapper an entry frame must have 211 address jcw = (address)sender.entry_frame_call_wrapper(); 212 213 bool jcw_safe = (jcw < thread->stack_base()) && (jcw > (address)sender.fp()); 214 215 return jcw_safe; 216 } 217 218 CompiledMethod* nm = sender_blob->as_compiled_method_or_null(); 219 if (nm != NULL) { 220 if (nm->is_deopt_mh_entry(sender_pc) || nm->is_deopt_entry(sender_pc) || 221 nm->method()->is_method_handle_intrinsic()) { 222 return false; 223 } 224 } 225 226 // If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size 227 // because the return address counts against the callee's frame. 228 229 if (sender_blob->frame_size() <= 0) { 230 assert(!sender_blob->is_compiled(), "should count return address at least"); 231 return false; 232 } 233 234 // We should never be able to see anything here except an nmethod. If something in the 235 // code cache (current frame) is called by an entity within the code cache that entity 236 // should not be anything but the call stub (already covered), the interpreter (already covered) 237 // or an nmethod. 238 239 if (!sender_blob->is_compiled()) { 240 return false; 241 } 242 243 // Could put some more validation for the potential non-interpreted sender 244 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... 245 246 // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb 247 248 // We've validated the potential sender that would be created 249 return true; 250 } 251 252 // Must be native-compiled frame. Since sender will try and use fp to find 253 // linkages it must be safe 254 255 if (!fp_safe) { 256 return false; 257 } 258 259 // Will the pc we fetch be non-zero (which we'll find at the oldest frame) 260 261 if ( (address) this->fp()[return_addr_offset] == NULL) return false; 262 263 264 // could try and do some more potential verification of native frame if we could think of some... 265 266 return true; 267 268 } 269 270 271 void frame::patch_pc(Thread* thread, address pc) { 272 address* pc_addr = &(((address*) sp())[-1]); 273 if (TracePcPatching) { 274 tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]", 275 p2i(pc_addr), p2i(*pc_addr), p2i(pc)); 276 } 277 // Either the return address is the original one or we are going to 278 // patch in the same address that's already there. 279 assert(_pc == *pc_addr || pc == *pc_addr, "must be"); 280 *pc_addr = pc; 281 _cb = CodeCache::find_blob(pc); 282 address original_pc = CompiledMethod::get_deopt_original_pc(this); 283 if (original_pc != NULL) { 284 assert(original_pc == _pc, "expected original PC to be stored before patching"); 285 _deopt_state = is_deoptimized; 286 // leave _pc as is 287 } else { 288 _deopt_state = not_deoptimized; 289 _pc = pc; 290 } 291 } 292 293 bool frame::is_interpreted_frame() const { 294 return Interpreter::contains(pc()); 295 } 296 297 int frame::frame_size(RegisterMap* map) const { 298 frame sender = this->sender(map); 299 return sender.sp() - sp(); 300 } 301 302 intptr_t* frame::entry_frame_argument_at(int offset) const { 303 // convert offset to index to deal with tsi 304 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); 305 // Entry frame's arguments are always in relation to unextended_sp() 306 return &unextended_sp()[index]; 307 } 308 309 // sender_sp 310 311 intptr_t* frame::interpreter_frame_sender_sp() const { 312 assert(is_interpreted_frame(), "interpreted frame expected"); 313 return (intptr_t*) at(interpreter_frame_sender_sp_offset); 314 } 315 316 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { 317 assert(is_interpreted_frame(), "interpreted frame expected"); 318 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); 319 } 320 321 322 // monitor elements 323 324 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { 325 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); 326 } 327 328 BasicObjectLock* frame::interpreter_frame_monitor_end() const { 329 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); 330 // make sure the pointer points inside the frame 331 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer"); 332 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer"); 333 return result; 334 } 335 336 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { 337 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; 338 } 339 340 // Used by template based interpreter deoptimization 341 void frame::interpreter_frame_set_last_sp(intptr_t* sp) { 342 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; 343 } 344 345 frame frame::sender_for_entry_frame(RegisterMap* map) const { 346 assert(map != NULL, "map must be set"); 347 // Java frame called from C; skip all C frames and return top C 348 // frame of that chunk as the sender 349 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); 350 assert(!entry_frame_is_first(), "next Java fp must be non zero"); 351 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack"); 352 // Since we are walking the stack now this nested anchor is obviously walkable 353 // even if it wasn't when it was stacked. 354 if (!jfa->walkable()) { 355 // Capture _last_Java_pc (if needed) and mark anchor walkable. 356 jfa->capture_last_Java_pc(); 357 } 358 map->clear(); 359 assert(map->include_argument_oops(), "should be set by clear"); 360 vmassert(jfa->last_Java_pc() != NULL, "not walkable"); 361 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); 362 return fr; 363 } 364 365 //------------------------------------------------------------------------------ 366 // frame::verify_deopt_original_pc 367 // 368 // Verifies the calculated original PC of a deoptimization PC for the 369 // given unextended SP. 370 #ifdef ASSERT 371 void frame::verify_deopt_original_pc(CompiledMethod* nm, intptr_t* unextended_sp) { 372 frame fr; 373 374 // This is ugly but it's better than to change {get,set}_original_pc 375 // to take an SP value as argument. And it's only a debugging 376 // method anyway. 377 fr._unextended_sp = unextended_sp; 378 379 address original_pc = nm->get_original_pc(&fr); 380 assert(nm->insts_contains_inclusive(original_pc), 381 "original PC must be in the main code section of the the compiled method (or must be immediately following it)"); 382 } 383 #endif 384 385 //------------------------------------------------------------------------------ 386 // frame::adjust_unextended_sp 387 #ifdef ASSERT 388 void frame::adjust_unextended_sp() { 389 // On x86, sites calling method handle intrinsics and lambda forms are treated 390 // as any other call site. Therefore, no special action is needed when we are 391 // returning to any of these call sites. 392 393 if (_cb != NULL) { 394 CompiledMethod* sender_cm = _cb->as_compiled_method_or_null(); 395 if (sender_cm != NULL) { 396 // If the sender PC is a deoptimization point, get the original PC. 397 if (sender_cm->is_deopt_entry(_pc) || 398 sender_cm->is_deopt_mh_entry(_pc)) { 399 verify_deopt_original_pc(sender_cm, _unextended_sp); 400 } 401 } 402 } 403 } 404 #endif 405 406 //------------------------------------------------------------------------------ 407 // frame::update_map_with_saved_link 408 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) { 409 // The interpreter and compiler(s) always save EBP/RBP in a known 410 // location on entry. We must record where that location is 411 // so this if EBP/RBP was live on callout from c2 we can find 412 // the saved copy no matter what it called. 413 414 // Since the interpreter always saves EBP/RBP if we record where it is then 415 // we don't have to always save EBP/RBP on entry and exit to c2 compiled 416 // code, on entry will be enough. 417 map->set_location(rbp->as_VMReg(), (address) link_addr); 418 #ifdef AMD64 419 // this is weird "H" ought to be at a higher address however the 420 // oopMaps seems to have the "H" regs at the same address and the 421 // vanilla register. 422 // XXXX make this go away 423 if (true) { 424 map->set_location(rbp->as_VMReg()->next(), (address) link_addr); 425 } 426 #endif // AMD64 427 } 428 429 430 //------------------------------------------------------------------------------ 431 // frame::sender_for_interpreter_frame 432 frame frame::sender_for_interpreter_frame(RegisterMap* map) const { 433 // SP is the raw SP from the sender after adapter or interpreter 434 // extension. 435 intptr_t* sender_sp = this->sender_sp(); 436 437 // This is the sp before any possible extension (adapter/locals). 438 intptr_t* unextended_sp = interpreter_frame_sender_sp(); 439 440 #if COMPILER2_OR_JVMCI 441 if (map->update_map()) { 442 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset)); 443 } 444 #endif // COMPILER2_OR_JVMCI 445 446 return frame(sender_sp, unextended_sp, link(), sender_pc()); 447 } 448 449 450 //------------------------------------------------------------------------------ 451 // frame::sender_for_compiled_frame 452 frame frame::sender_for_compiled_frame(RegisterMap* map) const { 453 assert(map != NULL, "map must be set"); 454 455 // frame owned by optimizing compiler 456 assert(_cb->frame_size() >= 0, "must have non-zero frame size"); 457 intptr_t* sender_sp = unextended_sp() + _cb->frame_size(); 458 intptr_t* unextended_sp = sender_sp; 459 460 // On Intel the return_address is always the word on the stack 461 address sender_pc = (address) *(sender_sp-1); 462 463 // This is the saved value of EBP which may or may not really be an FP. 464 // It is only an FP if the sender is an interpreter frame (or C1?). 465 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset); 466 467 if (map->update_map()) { 468 // Tell GC to use argument oopmaps for some runtime stubs that need it. 469 // For C1, the runtime stub might not have oop maps, so set this flag 470 // outside of update_register_map. 471 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); 472 if (_cb->oop_maps() != NULL) { 473 OopMapSet::update_register_map(this, map); 474 } 475 476 // Since the prolog does the save and restore of EBP there is no oopmap 477 // for it so we must fill in its location as if there was an oopmap entry 478 // since if our caller was compiled code there could be live jvm state in it. 479 update_map_with_saved_link(map, saved_fp_addr); 480 } 481 482 assert(sender_sp != sp(), "must have changed"); 483 return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc); 484 } 485 486 487 //------------------------------------------------------------------------------ 488 // frame::sender 489 frame frame::sender(RegisterMap* map) const { 490 // Default is we done have to follow them. The sender_for_xxx will 491 // update it accordingly 492 map->set_include_argument_oops(false); 493 494 if (is_entry_frame()) return sender_for_entry_frame(map); 495 if (is_interpreted_frame()) return sender_for_interpreter_frame(map); 496 assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); 497 498 if (_cb != NULL) { 499 return sender_for_compiled_frame(map); 500 } 501 // Must be native-compiled frame, i.e. the marshaling code for native 502 // methods that exists in the core system. 503 return frame(sender_sp(), link(), sender_pc()); 504 } 505 506 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { 507 assert(is_interpreted_frame(), "Not an interpreted frame"); 508 // These are reasonable sanity checks 509 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { 510 return false; 511 } 512 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { 513 return false; 514 } 515 if (fp() + interpreter_frame_initial_sp_offset < sp()) { 516 return false; 517 } 518 // These are hacks to keep us out of trouble. 519 // The problem with these is that they mask other problems 520 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above 521 return false; 522 } 523 524 // do some validation of frame elements 525 // first the method 526 527 Method* m = *interpreter_frame_method_addr(); 528 529 // validate the method we'd find in this potential sender 530 if (!Method::is_valid_method(m)) return false; 531 532 // stack frames shouldn't be much larger than max_stack elements 533 // this test requires the use the unextended_sp which is the sp as seen by 534 // the current frame, and not sp which is the "raw" pc which could point 535 // further because of local variables of the callee method inserted after 536 // method arguments 537 if (fp() - unextended_sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { 538 return false; 539 } 540 541 // validate bci/bcp 542 543 address bcp = interpreter_frame_bcp(); 544 if (m->validate_bci_from_bcp(bcp) < 0) { 545 return false; 546 } 547 548 // validate ConstantPoolCache* 549 ConstantPoolCache* cp = *interpreter_frame_cache_addr(); 550 if (MetaspaceObj::is_valid(cp) == false) return false; 551 552 // validate locals 553 554 address locals = (address) *interpreter_frame_locals_addr(); 555 556 if (locals > thread->stack_base() || locals < (address) fp()) return false; 557 558 // We'd have to be pretty unlucky to be mislead at this point 559 return true; 560 } 561 562 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { 563 assert(is_interpreted_frame(), "interpreted frame expected"); 564 Method* method = interpreter_frame_method(); 565 BasicType type = method->result_type(); 566 567 intptr_t* tos_addr; 568 if (method->is_native()) { 569 // Prior to calling into the runtime to report the method_exit the possible 570 // return value is pushed to the native stack. If the result is a jfloat/jdouble 571 // then ST0 is saved before EAX/EDX. See the note in generate_native_result 572 tos_addr = (intptr_t*)sp(); 573 if (type == T_FLOAT || type == T_DOUBLE) { 574 // QQQ seems like this code is equivalent on the two platforms 575 #ifdef AMD64 576 // This is times two because we do a push(ltos) after pushing XMM0 577 // and that takes two interpreter stack slots. 578 tos_addr += 2 * Interpreter::stackElementWords; 579 #else 580 tos_addr += 2; 581 #endif // AMD64 582 } 583 } else { 584 tos_addr = (intptr_t*)interpreter_frame_tos_address(); 585 } 586 587 switch (type) { 588 case T_OBJECT : 589 case T_ARRAY : { 590 oop obj; 591 if (method->is_native()) { 592 obj = cast_to_oop(at(interpreter_frame_oop_temp_offset)); 593 } else { 594 oop* obj_p = (oop*)tos_addr; 595 obj = (obj_p == NULL) ? (oop)NULL : *obj_p; 596 } 597 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); 598 *oop_result = obj; 599 break; 600 } 601 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break; 602 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break; 603 case T_CHAR : value_result->c = *(jchar*)tos_addr; break; 604 case T_SHORT : value_result->s = *(jshort*)tos_addr; break; 605 case T_INT : value_result->i = *(jint*)tos_addr; break; 606 case T_LONG : value_result->j = *(jlong*)tos_addr; break; 607 case T_FLOAT : { 608 #ifdef AMD64 609 value_result->f = *(jfloat*)tos_addr; 610 #else 611 if (method->is_native()) { 612 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat 613 value_result->f = (jfloat)d; 614 } else { 615 value_result->f = *(jfloat*)tos_addr; 616 } 617 #endif // AMD64 618 break; 619 } 620 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; 621 case T_VOID : /* Nothing to do */ break; 622 default : ShouldNotReachHere(); 623 } 624 625 return type; 626 } 627 628 629 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { 630 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); 631 return &interpreter_frame_tos_address()[index]; 632 } 633 634 #ifndef PRODUCT 635 636 #define DESCRIBE_FP_OFFSET(name) \ 637 values.describe(frame_no, fp() + frame::name##_offset, #name) 638 639 void frame::describe_pd(FrameValues& values, int frame_no) { 640 if (is_interpreted_frame()) { 641 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); 642 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); 643 DESCRIBE_FP_OFFSET(interpreter_frame_method); 644 DESCRIBE_FP_OFFSET(interpreter_frame_mirror); 645 DESCRIBE_FP_OFFSET(interpreter_frame_mdp); 646 DESCRIBE_FP_OFFSET(interpreter_frame_cache); 647 DESCRIBE_FP_OFFSET(interpreter_frame_locals); 648 DESCRIBE_FP_OFFSET(interpreter_frame_bcp); 649 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); 650 #ifdef AMD64 651 } else if (is_entry_frame()) { 652 // This could be more descriptive if we use the enum in 653 // stubGenerator to map to real names but it's most important to 654 // claim these frame slots so the error checking works. 655 for (int i = 0; i < entry_frame_after_call_words; i++) { 656 values.describe(frame_no, fp() - i, err_msg("call_stub word fp - %d", i)); 657 } 658 #endif // AMD64 659 } 660 } 661 #endif // !PRODUCT 662 663 intptr_t *frame::initial_deoptimization_info() { 664 // used to reset the saved FP 665 return fp(); 666 } 667 668 intptr_t* frame::real_fp() const { 669 if (_cb != NULL) { 670 // use the frame size if valid 671 int size = _cb->frame_size(); 672 if (size > 0) { 673 return unextended_sp() + size; 674 } 675 } 676 // else rely on fp() 677 assert(! is_compiled_frame(), "unknown compiled frame size"); 678 return fp(); 679 } 680 681 #ifndef PRODUCT 682 // This is a generic constructor which is only used by pns() in debug.cpp. 683 frame::frame(void* sp, void* fp, void* pc) { 684 init((intptr_t*)sp, (intptr_t*)fp, (address)pc); 685 } 686 687 void frame::pd_ps() {} 688 #endif 689 690 void JavaFrameAnchor::make_walkable(JavaThread* thread) { 691 // last frame set? 692 if (last_Java_sp() == NULL) return; 693 // already walkable? 694 if (walkable()) return; 695 vmassert(Thread::current() == (Thread*)thread, "not current thread"); 696 vmassert(last_Java_sp() != NULL, "not called from Java code?"); 697 vmassert(last_Java_pc() == NULL, "already walkable"); 698 capture_last_Java_pc(); 699 vmassert(walkable(), "something went wrong"); 700 } 701 702 void JavaFrameAnchor::capture_last_Java_pc() { 703 vmassert(_last_Java_sp != NULL, "no last frame set"); 704 vmassert(_last_Java_pc == NULL, "already walkable"); 705 _last_Java_pc = (address)_last_Java_sp[-1]; 706 }