1 /* 2 * Copyright (c) 1997, 2016, 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 "oops/markOop.hpp" 29 #include "oops/method.hpp" 30 #include "oops/oop.inline.hpp" 31 #include "prims/methodHandles.hpp" 32 #include "runtime/frame.inline.hpp" 33 #include "runtime/handles.inline.hpp" 34 #include "runtime/javaCalls.hpp" 35 #include "runtime/monitorChunk.hpp" 36 #include "runtime/os.inline.hpp" 37 #include "runtime/signature.hpp" 38 #include "runtime/stubCodeGenerator.hpp" 39 #include "runtime/stubRoutines.hpp" 40 #include "vmreg_x86.inline.hpp" 41 #ifdef COMPILER1 42 #include "c1/c1_Runtime1.hpp" 43 #include "runtime/vframeArray.hpp" 44 #endif 45 46 #ifdef ASSERT 47 void RegisterMap::check_location_valid() { 48 } 49 #endif 50 51 // Profiling/safepoint support 52 53 bool frame::safe_for_sender(JavaThread *thread) { 54 address sp = (address)_sp; 55 address fp = (address)_fp; 56 address unextended_sp = (address)_unextended_sp; 57 58 // consider stack guards when trying to determine "safe" stack pointers 59 static size_t stack_guard_size = os::uses_stack_guard_pages() ? 60 JavaThread::stack_red_zone_size() + JavaThread::stack_yellow_zone_size() : 0; 61 size_t usable_stack_size = thread->stack_size() - stack_guard_size; 62 63 // sp must be within the usable part of the stack (not in guards) 64 bool sp_safe = (sp < thread->stack_base()) && 65 (sp >= thread->stack_base() - usable_stack_size); 66 67 68 if (!sp_safe) { 69 return false; 70 } 71 72 // unextended sp must be within the stack and above or equal sp 73 bool unextended_sp_safe = (unextended_sp < thread->stack_base()) && 74 (unextended_sp >= sp); 75 76 if (!unextended_sp_safe) { 77 return false; 78 } 79 80 // an fp must be within the stack and above (but not equal) sp 81 // second evaluation on fp+ is added to handle situation where fp is -1 82 bool fp_safe = (fp < thread->stack_base() && (fp > sp) && (((fp + (return_addr_offset * sizeof(void*))) < thread->stack_base()))); 83 84 // We know sp/unextended_sp are safe only fp is questionable here 85 86 // If the current frame is known to the code cache then we can attempt to 87 // to construct the sender and do some validation of it. This goes a long way 88 // toward eliminating issues when we get in frame construction code 89 90 if (_cb != NULL ) { 91 92 // First check if frame is complete and tester is reliable 93 // Unfortunately we can only check frame complete for runtime stubs and nmethod 94 // other generic buffer blobs are more problematic so we just assume they are 95 // ok. adapter blobs never have a frame complete and are never ok. 96 97 if (!_cb->is_frame_complete_at(_pc)) { 98 if (_cb->is_compiled() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { 99 return false; 100 } 101 } 102 103 // Could just be some random pointer within the codeBlob 104 if (!_cb->code_contains(_pc)) { 105 return false; 106 } 107 108 // Entry frame checks 109 if (is_entry_frame()) { 110 // an entry frame must have a valid fp. 111 return fp_safe && is_entry_frame_valid(thread); 112 } 113 114 intptr_t* sender_sp = NULL; 115 intptr_t* sender_unextended_sp = NULL; 116 address sender_pc = NULL; 117 intptr_t* saved_fp = NULL; 118 119 if (is_interpreted_frame()) { 120 // fp must be safe 121 if (!fp_safe) { 122 return false; 123 } 124 125 sender_pc = (address) this->fp()[return_addr_offset]; 126 // for interpreted frames, the value below is the sender "raw" sp, 127 // which can be different from the sender unextended sp (the sp seen 128 // by the sender) because of current frame local variables 129 sender_sp = (intptr_t*) addr_at(sender_sp_offset); 130 sender_unextended_sp = (intptr_t*) this->fp()[interpreter_frame_sender_sp_offset]; 131 saved_fp = (intptr_t*) this->fp()[link_offset]; 132 133 } else { 134 // must be some sort of compiled/runtime frame 135 // fp does not have to be safe (although it could be check for c1?) 136 137 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc 138 if (_cb->frame_size() <= 0) { 139 return false; 140 } 141 142 sender_sp = _unextended_sp + _cb->frame_size(); 143 // Is sender_sp safe? 144 if ((address)sender_sp >= thread->stack_base()) { 145 return false; 146 } 147 sender_unextended_sp = sender_sp; 148 // On Intel the return_address is always the word on the stack 149 sender_pc = (address) *(sender_sp-1); 150 // Note: frame::sender_sp_offset is only valid for compiled frame 151 saved_fp = (intptr_t*) *(sender_sp - frame::sender_sp_offset); 152 } 153 154 155 // If the potential sender is the interpreter then we can do some more checking 156 if (Interpreter::contains(sender_pc)) { 157 158 // ebp is always saved in a recognizable place in any code we generate. However 159 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp 160 // is really a frame pointer. 161 162 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); 163 164 if (!saved_fp_safe) { 165 return false; 166 } 167 168 // construct the potential sender 169 170 frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc); 171 172 return sender.is_interpreted_frame_valid(thread); 173 174 } 175 176 // We must always be able to find a recognizable pc 177 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); 178 if (sender_pc == NULL || sender_blob == NULL) { 179 return false; 180 } 181 182 // Could be a zombie method 183 if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { 184 return false; 185 } 186 187 // Could just be some random pointer within the codeBlob 188 if (!sender_blob->code_contains(sender_pc)) { 189 return false; 190 } 191 192 // We should never be able to see an adapter if the current frame is something from code cache 193 if (sender_blob->is_adapter_blob()) { 194 return false; 195 } 196 197 // Could be the call_stub 198 if (StubRoutines::returns_to_call_stub(sender_pc)) { 199 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); 200 201 if (!saved_fp_safe) { 202 return false; 203 } 204 205 // construct the potential sender 206 207 frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc); 208 209 // Validate the JavaCallWrapper an entry frame must have 210 address jcw = (address)sender.entry_frame_call_wrapper(); 211 212 bool jcw_safe = (jcw < thread->stack_base()) && (jcw > (address)sender.fp()); 213 214 return jcw_safe; 215 } 216 217 CompiledMethod* nm = sender_blob->as_compiled_method_or_null(); 218 if (nm != NULL) { 219 if (nm->is_deopt_mh_entry(sender_pc) || nm->is_deopt_entry(sender_pc) || 220 nm->method()->is_method_handle_intrinsic()) { 221 return false; 222 } 223 } 224 225 // If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size 226 // because the return address counts against the callee's frame. 227 228 if (sender_blob->frame_size() <= 0) { 229 assert(!sender_blob->is_compiled(), "should count return address at least"); 230 return false; 231 } 232 233 // We should never be able to see anything here except an nmethod. If something in the 234 // code cache (current frame) is called by an entity within the code cache that entity 235 // should not be anything but the call stub (already covered), the interpreter (already covered) 236 // or an nmethod. 237 238 if (!sender_blob->is_compiled()) { 239 return false; 240 } 241 242 // Could put some more validation for the potential non-interpreted sender 243 // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... 244 245 // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb 246 247 // We've validated the potential sender that would be created 248 return true; 249 } 250 251 // Must be native-compiled frame. Since sender will try and use fp to find 252 // linkages it must be safe 253 254 if (!fp_safe) { 255 return false; 256 } 257 258 // Will the pc we fetch be non-zero (which we'll find at the oldest frame) 259 260 if ( (address) this->fp()[return_addr_offset] == NULL) return false; 261 262 263 // could try and do some more potential verification of native frame if we could think of some... 264 265 return true; 266 267 } 268 269 270 void frame::patch_pc(Thread* thread, address pc) { 271 address* pc_addr = &(((address*) sp())[-1]); 272 if (TracePcPatching) { 273 tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]", 274 p2i(pc_addr), p2i(*pc_addr), p2i(pc)); 275 } 276 // Either the return address is the original one or we are going to 277 // patch in the same address that's already there. 278 assert(_pc == *pc_addr || pc == *pc_addr, "must be"); 279 *pc_addr = pc; 280 _cb = CodeCache::find_blob(pc); 281 address original_pc = CompiledMethod::get_deopt_original_pc(this); 282 if (original_pc != NULL) { 283 assert(original_pc == _pc, "expected original PC to be stored before patching"); 284 _deopt_state = is_deoptimized; 285 // leave _pc as is 286 } else { 287 _deopt_state = not_deoptimized; 288 _pc = pc; 289 } 290 } 291 292 bool frame::is_interpreted_frame() const { 293 return Interpreter::contains(pc()); 294 } 295 296 int frame::frame_size(RegisterMap* map) const { 297 frame sender = this->sender(map); 298 return sender.sp() - sp(); 299 } 300 301 intptr_t* frame::entry_frame_argument_at(int offset) const { 302 // convert offset to index to deal with tsi 303 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); 304 // Entry frame's arguments are always in relation to unextended_sp() 305 return &unextended_sp()[index]; 306 } 307 308 // sender_sp 309 310 intptr_t* frame::interpreter_frame_sender_sp() const { 311 assert(is_interpreted_frame(), "interpreted frame expected"); 312 return (intptr_t*) at(interpreter_frame_sender_sp_offset); 313 } 314 315 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { 316 assert(is_interpreted_frame(), "interpreted frame expected"); 317 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); 318 } 319 320 321 // monitor elements 322 323 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { 324 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); 325 } 326 327 BasicObjectLock* frame::interpreter_frame_monitor_end() const { 328 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); 329 // make sure the pointer points inside the frame 330 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer"); 331 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer"); 332 return result; 333 } 334 335 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { 336 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; 337 } 338 339 // Used by template based interpreter deoptimization 340 void frame::interpreter_frame_set_last_sp(intptr_t* sp) { 341 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; 342 } 343 344 frame frame::sender_for_entry_frame(RegisterMap* map) const { 345 assert(map != NULL, "map must be set"); 346 // Java frame called from C; skip all C frames and return top C 347 // frame of that chunk as the sender 348 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); 349 assert(!entry_frame_is_first(), "next Java fp must be non zero"); 350 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack"); 351 // Since we are walking the stack now this nested anchor is obviously walkable 352 // even if it wasn't when it was stacked. 353 if (!jfa->walkable()) { 354 // Capture _last_Java_pc (if needed) and mark anchor walkable. 355 jfa->capture_last_Java_pc(); 356 } 357 map->clear(); 358 assert(map->include_argument_oops(), "should be set by clear"); 359 vmassert(jfa->last_Java_pc() != NULL, "not walkable"); 360 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); 361 return fr; 362 } 363 364 //------------------------------------------------------------------------------ 365 // frame::verify_deopt_original_pc 366 // 367 // Verifies the calculated original PC of a deoptimization PC for the 368 // given unextended SP. 369 #ifdef ASSERT 370 void frame::verify_deopt_original_pc(CompiledMethod* nm, intptr_t* unextended_sp) { 371 frame fr; 372 373 // This is ugly but it's better than to change {get,set}_original_pc 374 // to take an SP value as argument. And it's only a debugging 375 // method anyway. 376 fr._unextended_sp = unextended_sp; 377 378 address original_pc = nm->get_original_pc(&fr); 379 assert(nm->insts_contains_inclusive(original_pc), 380 "original PC must be in the main code section of the the compiled method (or must be immediately following it)"); 381 } 382 #endif 383 384 //------------------------------------------------------------------------------ 385 // frame::adjust_unextended_sp 386 void frame::adjust_unextended_sp() { 387 // On x86, sites calling method handle intrinsics and lambda forms are treated 388 // as any other call site. Therefore, no special action is needed when we are 389 // returning to any of these call sites. 390 391 if (_cb != NULL) { 392 CompiledMethod* sender_cm = _cb->as_compiled_method_or_null(); 393 if (sender_cm != NULL) { 394 // If the sender PC is a deoptimization point, get the original PC. 395 if (sender_cm->is_deopt_entry(_pc) || 396 sender_cm->is_deopt_mh_entry(_pc)) { 397 DEBUG_ONLY(verify_deopt_original_pc(sender_cm, _unextended_sp)); 398 } 399 } 400 } 401 } 402 403 //------------------------------------------------------------------------------ 404 // frame::update_map_with_saved_link 405 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) { 406 // The interpreter and compiler(s) always save EBP/RBP in a known 407 // location on entry. We must record where that location is 408 // so this if EBP/RBP was live on callout from c2 we can find 409 // the saved copy no matter what it called. 410 411 // Since the interpreter always saves EBP/RBP if we record where it is then 412 // we don't have to always save EBP/RBP on entry and exit to c2 compiled 413 // code, on entry will be enough. 414 map->set_location(rbp->as_VMReg(), (address) link_addr); 415 #ifdef AMD64 416 // this is weird "H" ought to be at a higher address however the 417 // oopMaps seems to have the "H" regs at the same address and the 418 // vanilla register. 419 // XXXX make this go away 420 if (true) { 421 map->set_location(rbp->as_VMReg()->next(), (address) link_addr); 422 } 423 #endif // AMD64 424 } 425 426 427 //------------------------------------------------------------------------------ 428 // frame::sender_for_interpreter_frame 429 frame frame::sender_for_interpreter_frame(RegisterMap* map) const { 430 // SP is the raw SP from the sender after adapter or interpreter 431 // extension. 432 intptr_t* sender_sp = this->sender_sp(); 433 434 // This is the sp before any possible extension (adapter/locals). 435 intptr_t* unextended_sp = interpreter_frame_sender_sp(); 436 437 #if defined(COMPILER2) || INCLUDE_JVMCI 438 if (map->update_map()) { 439 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset)); 440 } 441 #endif // COMPILER2 || INCLUDE_JVMCI 442 443 return frame(sender_sp, unextended_sp, link(), sender_pc()); 444 } 445 446 447 //------------------------------------------------------------------------------ 448 // frame::sender_for_compiled_frame 449 frame frame::sender_for_compiled_frame(RegisterMap* map) const { 450 assert(map != NULL, "map must be set"); 451 452 // frame owned by optimizing compiler 453 assert(_cb->frame_size() >= 0, "must have non-zero frame size"); 454 intptr_t* sender_sp = unextended_sp() + _cb->frame_size(); 455 intptr_t* unextended_sp = sender_sp; 456 457 // On Intel the return_address is always the word on the stack 458 address sender_pc = (address) *(sender_sp-1); 459 460 // This is the saved value of EBP which may or may not really be an FP. 461 // It is only an FP if the sender is an interpreter frame (or C1?). 462 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset); 463 464 if (map->update_map()) { 465 // Tell GC to use argument oopmaps for some runtime stubs that need it. 466 // For C1, the runtime stub might not have oop maps, so set this flag 467 // outside of update_register_map. 468 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); 469 if (_cb->oop_maps() != NULL) { 470 OopMapSet::update_register_map(this, map); 471 } 472 473 // Since the prolog does the save and restore of EBP there is no oopmap 474 // for it so we must fill in its location as if there was an oopmap entry 475 // since if our caller was compiled code there could be live jvm state in it. 476 update_map_with_saved_link(map, saved_fp_addr); 477 } 478 479 assert(sender_sp != sp(), "must have changed"); 480 return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc); 481 } 482 483 484 //------------------------------------------------------------------------------ 485 // frame::sender 486 frame frame::sender(RegisterMap* map) const { 487 // Default is we done have to follow them. The sender_for_xxx will 488 // update it accordingly 489 map->set_include_argument_oops(false); 490 491 if (is_entry_frame()) return sender_for_entry_frame(map); 492 if (is_interpreted_frame()) return sender_for_interpreter_frame(map); 493 assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); 494 495 if (_cb != NULL) { 496 return sender_for_compiled_frame(map); 497 } 498 // Must be native-compiled frame, i.e. the marshaling code for native 499 // methods that exists in the core system. 500 return frame(sender_sp(), link(), sender_pc()); 501 } 502 503 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { 504 assert(is_interpreted_frame(), "Not an interpreted frame"); 505 // These are reasonable sanity checks 506 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { 507 return false; 508 } 509 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { 510 return false; 511 } 512 if (fp() + interpreter_frame_initial_sp_offset < sp()) { 513 return false; 514 } 515 // These are hacks to keep us out of trouble. 516 // The problem with these is that they mask other problems 517 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above 518 return false; 519 } 520 521 // do some validation of frame elements 522 // first the method 523 524 Method* m = *interpreter_frame_method_addr(); 525 526 // validate the method we'd find in this potential sender 527 if (!m->is_valid_method()) return false; 528 529 // stack frames shouldn't be much larger than max_stack elements 530 // this test requires the use the unextended_sp which is the sp as seen by 531 // the current frame, and not sp which is the "raw" pc which could point 532 // further because of local variables of the callee method inserted after 533 // method arguments 534 if (fp() - unextended_sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { 535 return false; 536 } 537 538 // validate bci/bcp 539 540 address bcp = interpreter_frame_bcp(); 541 if (m->validate_bci_from_bcp(bcp) < 0) { 542 return false; 543 } 544 545 // validate ConstantPoolCache* 546 ConstantPoolCache* cp = *interpreter_frame_cache_addr(); 547 if (cp == NULL || !cp->is_metaspace_object()) return false; 548 549 // validate locals 550 551 address locals = (address) *interpreter_frame_locals_addr(); 552 553 if (locals > thread->stack_base() || locals < (address) fp()) return false; 554 555 // We'd have to be pretty unlucky to be mislead at this point 556 return true; 557 } 558 559 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { 560 assert(is_interpreted_frame(), "interpreted frame expected"); 561 Method* method = interpreter_frame_method(); 562 BasicType type = method->result_type(); 563 564 intptr_t* tos_addr; 565 if (method->is_native()) { 566 // Prior to calling into the runtime to report the method_exit the possible 567 // return value is pushed to the native stack. If the result is a jfloat/jdouble 568 // then ST0 is saved before EAX/EDX. See the note in generate_native_result 569 tos_addr = (intptr_t*)sp(); 570 if (type == T_FLOAT || type == T_DOUBLE) { 571 // QQQ seems like this code is equivalent on the two platforms 572 #ifdef AMD64 573 // This is times two because we do a push(ltos) after pushing XMM0 574 // and that takes two interpreter stack slots. 575 tos_addr += 2 * Interpreter::stackElementWords; 576 #else 577 tos_addr += 2; 578 #endif // AMD64 579 } 580 } else { 581 tos_addr = (intptr_t*)interpreter_frame_tos_address(); 582 } 583 584 switch (type) { 585 case T_OBJECT : 586 case T_ARRAY : { 587 oop obj; 588 if (method->is_native()) { 589 obj = cast_to_oop(at(interpreter_frame_oop_temp_offset)); 590 } else { 591 oop* obj_p = (oop*)tos_addr; 592 obj = (obj_p == NULL) ? (oop)NULL : *obj_p; 593 } 594 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); 595 *oop_result = obj; 596 break; 597 } 598 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break; 599 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break; 600 case T_CHAR : value_result->c = *(jchar*)tos_addr; break; 601 case T_SHORT : value_result->s = *(jshort*)tos_addr; break; 602 case T_INT : value_result->i = *(jint*)tos_addr; break; 603 case T_LONG : value_result->j = *(jlong*)tos_addr; break; 604 case T_FLOAT : { 605 #ifdef AMD64 606 value_result->f = *(jfloat*)tos_addr; 607 #else 608 if (method->is_native()) { 609 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat 610 value_result->f = (jfloat)d; 611 } else { 612 value_result->f = *(jfloat*)tos_addr; 613 } 614 #endif // AMD64 615 break; 616 } 617 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; 618 case T_VOID : /* Nothing to do */ break; 619 default : ShouldNotReachHere(); 620 } 621 622 return type; 623 } 624 625 626 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { 627 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); 628 return &interpreter_frame_tos_address()[index]; 629 } 630 631 #ifndef PRODUCT 632 633 #define DESCRIBE_FP_OFFSET(name) \ 634 values.describe(frame_no, fp() + frame::name##_offset, #name) 635 636 void frame::describe_pd(FrameValues& values, int frame_no) { 637 if (is_interpreted_frame()) { 638 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); 639 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); 640 DESCRIBE_FP_OFFSET(interpreter_frame_method); 641 DESCRIBE_FP_OFFSET(interpreter_frame_mirror); 642 DESCRIBE_FP_OFFSET(interpreter_frame_mdp); 643 DESCRIBE_FP_OFFSET(interpreter_frame_cache); 644 DESCRIBE_FP_OFFSET(interpreter_frame_locals); 645 DESCRIBE_FP_OFFSET(interpreter_frame_bcp); 646 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); 647 #ifdef AMD64 648 } else if (is_entry_frame()) { 649 // This could be more descriptive if we use the enum in 650 // stubGenerator to map to real names but it's most important to 651 // claim these frame slots so the error checking works. 652 for (int i = 0; i < entry_frame_after_call_words; i++) { 653 values.describe(frame_no, fp() - i, err_msg("call_stub word fp - %d", i)); 654 } 655 #endif // AMD64 656 } 657 } 658 #endif // !PRODUCT 659 660 intptr_t *frame::initial_deoptimization_info() { 661 // used to reset the saved FP 662 return fp(); 663 } 664 665 intptr_t* frame::real_fp() const { 666 if (_cb != NULL) { 667 // use the frame size if valid 668 int size = _cb->frame_size(); 669 if (size > 0) { 670 return unextended_sp() + size; 671 } 672 } 673 // else rely on fp() 674 assert(! is_compiled_frame(), "unknown compiled frame size"); 675 return fp(); 676 } 677 678 #ifndef PRODUCT 679 // This is a generic constructor which is only used by pns() in debug.cpp. 680 frame::frame(void* sp, void* fp, void* pc) { 681 init((intptr_t*)sp, (intptr_t*)fp, (address)pc); 682 } 683 684 void frame::pd_ps() {} 685 686 #endif 687 688 void JavaFrameAnchor::make_walkable(JavaThread* thread) { 689 // last frame set? 690 if (last_Java_sp() == NULL) return; 691 // already walkable? 692 if (walkable()) return; 693 vmassert(Thread::current() == (Thread*)thread, "not current thread"); 694 vmassert(last_Java_sp() != NULL, "not called from Java code?"); 695 vmassert(last_Java_pc() == NULL, "already walkable"); 696 capture_last_Java_pc(); 697 vmassert(walkable(), "something went wrong"); 698 } 699 700 void JavaFrameAnchor::capture_last_Java_pc() { 701 vmassert(_last_Java_sp != NULL, "no last frame set"); 702 vmassert(_last_Java_pc == NULL, "already walkable"); 703 _last_Java_pc = (address)_last_Java_sp[-1]; 704 }