1 /* 2 * Copyright (c) 1997, 2014, 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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 52 53 // Profiling/safepoint support 54 55 bool frame::safe_for_sender(JavaThread *thread) { 56 address sp = (address)_sp; 57 address fp = (address)_fp; 58 address unextended_sp = (address)_unextended_sp; 59 60 // consider stack guards when trying to determine "safe" stack pointers 61 static size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_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_nmethod() || _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. 112 113 if (!fp_safe) return false; 114 115 // Validate the JavaCallWrapper an entry frame must have 116 117 address jcw = (address)entry_frame_call_wrapper(); 118 119 bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > fp); 120 121 return jcw_safe; 122 123 } 124 125 intptr_t* sender_sp = NULL; 126 address sender_pc = NULL; 127 128 if (is_interpreted_frame()) { 129 // fp must be safe 130 if (!fp_safe) { 131 return false; 132 } 133 134 sender_pc = (address) this->fp()[return_addr_offset]; 135 sender_sp = (intptr_t*) addr_at(sender_sp_offset); 136 137 } else { 138 // must be some sort of compiled/runtime frame 139 // fp does not have to be safe (although it could be check for c1?) 140 141 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc 142 if (_cb->frame_size() <= 0) { 143 return false; 144 } 145 146 sender_sp = _unextended_sp + _cb->frame_size(); 147 // On Intel the return_address is always the word on the stack 148 sender_pc = (address) *(sender_sp-1); 149 } 150 151 152 // If the potential sender is the interpreter then we can do some more checking 153 if (Interpreter::contains(sender_pc)) { 154 155 // ebp is always saved in a recognizable place in any code we generate. However 156 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp 157 // is really a frame pointer. 158 159 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); 160 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); 161 162 if (!saved_fp_safe) { 163 return false; 164 } 165 166 // construct the potential sender 167 168 frame sender(sender_sp, saved_fp, sender_pc); 169 170 return sender.is_interpreted_frame_valid(thread); 171 172 } 173 174 // We must always be able to find a recognizable pc 175 CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); 176 if (sender_pc == NULL || sender_blob == NULL) { 177 return false; 178 } 179 180 // Could be a zombie method 181 if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { 182 return false; 183 } 184 185 // Could just be some random pointer within the codeBlob 186 if (!sender_blob->code_contains(sender_pc)) { 187 return false; 188 } 189 190 // We should never be able to see an adapter if the current frame is something from code cache 191 if (sender_blob->is_adapter_blob()) { 192 return false; 193 } 194 195 // Could be the call_stub 196 if (StubRoutines::returns_to_call_stub(sender_pc)) { 197 intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset); 198 bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); 199 200 if (!saved_fp_safe) { 201 return false; 202 } 203 204 // construct the potential sender 205 206 frame sender(sender_sp, saved_fp, sender_pc); 207 208 // Validate the JavaCallWrapper an entry frame must have 209 address jcw = (address)sender.entry_frame_call_wrapper(); 210 211 bool jcw_safe = (jcw < thread->stack_base()) && ( jcw > (address)sender.fp()); 212 213 return jcw_safe; 214 } 215 216 if (sender_blob->is_nmethod()) { 217 nmethod* nm = sender_blob->as_nmethod_or_null(); 218 if (nm != NULL) { 219 if (nm->is_deopt_mh_entry(sender_pc) || nm->is_deopt_entry(sender_pc)) { 220 return false; 221 } 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_nmethod(), "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_nmethod()) { 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 pc_addr, *pc_addr, 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 = nmethod::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 #ifdef CC_INTERP 310 intptr_t* frame::interpreter_frame_sender_sp() const { 311 assert(is_interpreted_frame(), "interpreted frame expected"); 312 // QQQ why does this specialize method exist if frame::sender_sp() does same thing? 313 // seems odd and if we always know interpreted vs. non then sender_sp() is really 314 // doing too much work. 315 return get_interpreterState()->sender_sp(); 316 } 317 318 // monitor elements 319 320 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { 321 return get_interpreterState()->monitor_base(); 322 } 323 324 BasicObjectLock* frame::interpreter_frame_monitor_end() const { 325 return (BasicObjectLock*) get_interpreterState()->stack_base(); 326 } 327 328 #else // CC_INTERP 329 330 intptr_t* frame::interpreter_frame_sender_sp() const { 331 assert(is_interpreted_frame(), "interpreted frame expected"); 332 return (intptr_t*) at(interpreter_frame_sender_sp_offset); 333 } 334 335 void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { 336 assert(is_interpreted_frame(), "interpreted frame expected"); 337 ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); 338 } 339 340 341 // monitor elements 342 343 BasicObjectLock* frame::interpreter_frame_monitor_begin() const { 344 return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); 345 } 346 347 BasicObjectLock* frame::interpreter_frame_monitor_end() const { 348 BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); 349 // make sure the pointer points inside the frame 350 assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer"); 351 assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer"); 352 return result; 353 } 354 355 void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { 356 *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; 357 } 358 359 // Used by template based interpreter deoptimization 360 void frame::interpreter_frame_set_last_sp(intptr_t* sp) { 361 *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; 362 } 363 #endif // CC_INTERP 364 365 frame frame::sender_for_entry_frame(RegisterMap* map) const { 366 assert(map != NULL, "map must be set"); 367 // Java frame called from C; skip all C frames and return top C 368 // frame of that chunk as the sender 369 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); 370 assert(!entry_frame_is_first(), "next Java fp must be non zero"); 371 assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack"); 372 map->clear(); 373 assert(map->include_argument_oops(), "should be set by clear"); 374 if (jfa->last_Java_pc() != NULL ) { 375 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); 376 return fr; 377 } 378 frame fr(jfa->last_Java_sp(), jfa->last_Java_fp()); 379 return fr; 380 } 381 382 //------------------------------------------------------------------------------ 383 // frame::verify_deopt_original_pc 384 // 385 // Verifies the calculated original PC of a deoptimization PC for the 386 // given unextended SP. The unextended SP might also be the saved SP 387 // for MethodHandle call sites. 388 #ifdef ASSERT 389 void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return) { 390 frame fr; 391 392 // This is ugly but it's better than to change {get,set}_original_pc 393 // to take an SP value as argument. And it's only a debugging 394 // method anyway. 395 fr._unextended_sp = unextended_sp; 396 397 address original_pc = nm->get_original_pc(&fr); 398 assert(nm->insts_contains(original_pc), "original PC must be in nmethod"); 399 assert(nm->is_method_handle_return(original_pc) == is_method_handle_return, "must be"); 400 } 401 #endif 402 403 //------------------------------------------------------------------------------ 404 // frame::adjust_unextended_sp 405 void frame::adjust_unextended_sp() { 406 // If we are returning to a compiled MethodHandle call site, the 407 // saved_fp will in fact be a saved value of the unextended SP. The 408 // simplest way to tell whether we are returning to such a call site 409 // is as follows: 410 411 nmethod* sender_nm = (_cb == NULL) ? NULL : _cb->as_nmethod_or_null(); 412 if (sender_nm != NULL) { 413 // If the sender PC is a deoptimization point, get the original 414 // PC. For MethodHandle call site the unextended_sp is stored in 415 // saved_fp. 416 if (sender_nm->is_deopt_mh_entry(_pc)) { 417 DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, _fp)); 418 _unextended_sp = _fp; 419 } 420 else if (sender_nm->is_deopt_entry(_pc)) { 421 DEBUG_ONLY(verify_deopt_original_pc(sender_nm, _unextended_sp)); 422 } 423 else if (sender_nm->is_method_handle_return(_pc)) { 424 _unextended_sp = _fp; 425 } 426 } 427 } 428 429 //------------------------------------------------------------------------------ 430 // frame::update_map_with_saved_link 431 void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) { 432 // The interpreter and compiler(s) always save EBP/RBP in a known 433 // location on entry. We must record where that location is 434 // so this if EBP/RBP was live on callout from c2 we can find 435 // the saved copy no matter what it called. 436 437 // Since the interpreter always saves EBP/RBP if we record where it is then 438 // we don't have to always save EBP/RBP on entry and exit to c2 compiled 439 // code, on entry will be enough. 440 map->set_location(rbp->as_VMReg(), (address) link_addr); 441 #ifdef AMD64 442 // this is weird "H" ought to be at a higher address however the 443 // oopMaps seems to have the "H" regs at the same address and the 444 // vanilla register. 445 // XXXX make this go away 446 if (true) { 447 map->set_location(rbp->as_VMReg()->next(), (address) link_addr); 448 } 449 #endif // AMD64 450 } 451 452 453 //------------------------------------------------------------------------------ 454 // frame::sender_for_interpreter_frame 455 frame frame::sender_for_interpreter_frame(RegisterMap* map) const { 456 // SP is the raw SP from the sender after adapter or interpreter 457 // extension. 458 intptr_t* sender_sp = this->sender_sp(); 459 460 // This is the sp before any possible extension (adapter/locals). 461 intptr_t* unextended_sp = interpreter_frame_sender_sp(); 462 463 #ifdef COMPILER2 464 if (map->update_map()) { 465 update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset)); 466 } 467 #endif // COMPILER2 468 469 return frame(sender_sp, unextended_sp, link(), sender_pc()); 470 } 471 472 473 //------------------------------------------------------------------------------ 474 // frame::sender_for_compiled_frame 475 frame frame::sender_for_compiled_frame(RegisterMap* map) const { 476 assert(map != NULL, "map must be set"); 477 478 // frame owned by optimizing compiler 479 assert(_cb->frame_size() >= 0, "must have non-zero frame size"); 480 intptr_t* sender_sp = unextended_sp() + _cb->frame_size(); 481 intptr_t* unextended_sp = sender_sp; 482 483 // On Intel the return_address is always the word on the stack 484 address sender_pc = (address) *(sender_sp-1); 485 486 // This is the saved value of EBP which may or may not really be an FP. 487 // It is only an FP if the sender is an interpreter frame (or C1?). 488 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset); 489 490 if (map->update_map()) { 491 // Tell GC to use argument oopmaps for some runtime stubs that need it. 492 // For C1, the runtime stub might not have oop maps, so set this flag 493 // outside of update_register_map. 494 map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); 495 if (_cb->oop_maps() != NULL) { 496 OopMapSet::update_register_map(this, map); 497 } 498 499 // Since the prolog does the save and restore of EBP there is no oopmap 500 // for it so we must fill in its location as if there was an oopmap entry 501 // since if our caller was compiled code there could be live jvm state in it. 502 update_map_with_saved_link(map, saved_fp_addr); 503 } 504 505 assert(sender_sp != sp(), "must have changed"); 506 return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc); 507 } 508 509 510 //------------------------------------------------------------------------------ 511 // frame::sender 512 frame frame::sender(RegisterMap* map) const { 513 // Default is we done have to follow them. The sender_for_xxx will 514 // update it accordingly 515 map->set_include_argument_oops(false); 516 517 if (is_entry_frame()) return sender_for_entry_frame(map); 518 if (is_interpreted_frame()) return sender_for_interpreter_frame(map); 519 assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); 520 521 if (_cb != NULL) { 522 return sender_for_compiled_frame(map); 523 } 524 // Must be native-compiled frame, i.e. the marshaling code for native 525 // methods that exists in the core system. 526 return frame(sender_sp(), link(), sender_pc()); 527 } 528 529 530 bool frame::interpreter_frame_equals_unpacked_fp(intptr_t* fp) { 531 assert(is_interpreted_frame(), "must be interpreter frame"); 532 Method* method = interpreter_frame_method(); 533 // When unpacking an optimized frame the frame pointer is 534 // adjusted with: 535 int diff = (method->max_locals() - method->size_of_parameters()) * 536 Interpreter::stackElementWords; 537 return _fp == (fp - diff); 538 } 539 540 bool frame::is_interpreted_frame_valid(JavaThread* thread) const { 541 // QQQ 542 #ifdef CC_INTERP 543 #else 544 assert(is_interpreted_frame(), "Not an interpreted frame"); 545 // These are reasonable sanity checks 546 if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { 547 return false; 548 } 549 if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { 550 return false; 551 } 552 if (fp() + interpreter_frame_initial_sp_offset < sp()) { 553 return false; 554 } 555 // These are hacks to keep us out of trouble. 556 // The problem with these is that they mask other problems 557 if (fp() <= sp()) { // this attempts to deal with unsigned comparison above 558 return false; 559 } 560 561 // do some validation of frame elements 562 563 // first the method 564 565 Method* m = *interpreter_frame_method_addr(); 566 567 // validate the method we'd find in this potential sender 568 if (!m->is_valid_method()) return false; 569 570 // stack frames shouldn't be much larger than max_stack elements 571 572 if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { 573 return false; 574 } 575 576 // validate bci/bcp 577 578 address bcp = interpreter_frame_bcp(); 579 if (m->validate_bci_from_bcp(bcp) < 0) { 580 return false; 581 } 582 583 // validate ConstantPoolCache* 584 ConstantPoolCache* cp = *interpreter_frame_cache_addr(); 585 if (cp == NULL || !cp->is_metaspace_object()) return false; 586 587 // validate locals 588 589 address locals = (address) *interpreter_frame_locals_addr(); 590 591 if (locals > thread->stack_base() || locals < (address) fp()) return false; 592 593 // We'd have to be pretty unlucky to be mislead at this point 594 595 #endif // CC_INTERP 596 return true; 597 } 598 599 BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { 600 #ifdef CC_INTERP 601 // Needed for JVMTI. The result should always be in the 602 // interpreterState object 603 interpreterState istate = get_interpreterState(); 604 #endif // CC_INTERP 605 assert(is_interpreted_frame(), "interpreted frame expected"); 606 Method* method = interpreter_frame_method(); 607 BasicType type = method->result_type(); 608 609 intptr_t* tos_addr; 610 if (method->is_native()) { 611 // Prior to calling into the runtime to report the method_exit the possible 612 // return value is pushed to the native stack. If the result is a jfloat/jdouble 613 // then ST0 is saved before EAX/EDX. See the note in generate_native_result 614 tos_addr = (intptr_t*)sp(); 615 if (type == T_FLOAT || type == T_DOUBLE) { 616 // QQQ seems like this code is equivalent on the two platforms 617 #ifdef AMD64 618 // This is times two because we do a push(ltos) after pushing XMM0 619 // and that takes two interpreter stack slots. 620 tos_addr += 2 * Interpreter::stackElementWords; 621 #else 622 tos_addr += 2; 623 #endif // AMD64 624 } 625 } else { 626 tos_addr = (intptr_t*)interpreter_frame_tos_address(); 627 } 628 629 switch (type) { 630 case T_OBJECT : 631 case T_ARRAY : { 632 oop obj; 633 if (method->is_native()) { 634 #ifdef CC_INTERP 635 obj = istate->_oop_temp; 636 #else 637 obj = cast_to_oop(at(interpreter_frame_oop_temp_offset)); 638 #endif // CC_INTERP 639 } else { 640 oop* obj_p = (oop*)tos_addr; 641 obj = (obj_p == NULL) ? (oop)NULL : *obj_p; 642 } 643 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); 644 *oop_result = obj; 645 break; 646 } 647 case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break; 648 case T_BYTE : value_result->b = *(jbyte*)tos_addr; break; 649 case T_CHAR : value_result->c = *(jchar*)tos_addr; break; 650 case T_SHORT : value_result->s = *(jshort*)tos_addr; break; 651 case T_INT : value_result->i = *(jint*)tos_addr; break; 652 case T_LONG : value_result->j = *(jlong*)tos_addr; break; 653 case T_FLOAT : { 654 #ifdef AMD64 655 value_result->f = *(jfloat*)tos_addr; 656 #else 657 if (method->is_native()) { 658 jdouble d = *(jdouble*)tos_addr; // Result was in ST0 so need to convert to jfloat 659 value_result->f = (jfloat)d; 660 } else { 661 value_result->f = *(jfloat*)tos_addr; 662 } 663 #endif // AMD64 664 break; 665 } 666 case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; 667 case T_VOID : /* Nothing to do */ break; 668 default : ShouldNotReachHere(); 669 } 670 671 return type; 672 } 673 674 675 intptr_t* frame::interpreter_frame_tos_at(jint offset) const { 676 int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); 677 return &interpreter_frame_tos_address()[index]; 678 } 679 680 #ifndef PRODUCT 681 682 #define DESCRIBE_FP_OFFSET(name) \ 683 values.describe(frame_no, fp() + frame::name##_offset, #name) 684 685 void frame::describe_pd(FrameValues& values, int frame_no) { 686 if (is_interpreted_frame()) { 687 #ifndef CC_INTERP 688 DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); 689 DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); 690 DESCRIBE_FP_OFFSET(interpreter_frame_method); 691 DESCRIBE_FP_OFFSET(interpreter_frame_mdp); 692 DESCRIBE_FP_OFFSET(interpreter_frame_cache); 693 DESCRIBE_FP_OFFSET(interpreter_frame_locals); 694 DESCRIBE_FP_OFFSET(interpreter_frame_bcp); 695 DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); 696 #endif 697 } 698 } 699 #endif 700 701 intptr_t *frame::initial_deoptimization_info() { 702 // used to reset the saved FP 703 return fp(); 704 } 705 706 intptr_t* frame::real_fp() const { 707 if (_cb != NULL) { 708 // use the frame size if valid 709 int size = _cb->frame_size(); 710 if (size > 0) { 711 return unextended_sp() + size; 712 } 713 } 714 // else rely on fp() 715 assert(! is_compiled_frame(), "unknown compiled frame size"); 716 return fp(); 717 } 718 719 #ifndef PRODUCT 720 // This is a generic constructor which is only used by pns() in debug.cpp. 721 frame::frame(void* sp, void* fp, void* pc) { 722 _sp = (intptr_t*)sp; 723 _unextended_sp = (intptr_t*)sp; 724 _fp = (intptr_t*)fp; 725 _pc = (address)pc; 726 assert(pc != NULL, "no pc?"); 727 _cb = CodeCache::find_blob(pc); 728 adjust_unextended_sp(); 729 730 address original_pc = nmethod::get_deopt_original_pc(this); 731 if (original_pc != NULL) { 732 _pc = original_pc; 733 _deopt_state = is_deoptimized; 734 } else { 735 _deopt_state = not_deoptimized; 736 } 737 } 738 #endif