1 //===-- StackFrameList.cpp --------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/Target/StackFrameList.h" 11 12 // C Includes 13 // C++ Includes 14 // Other libraries and framework includes 15 // Project includes 16 #include "lldb/Core/StreamFile.h" 17 #include "lldb/Core/SourceManager.h" 18 #include "lldb/Symbol/Block.h" 19 #include "lldb/Symbol/Function.h" 20 #include "lldb/Symbol/Symbol.h" 21 #include "lldb/Target/Process.h" 22 #include "lldb/Target/RegisterContext.h" 23 #include "lldb/Target/StackFrame.h" 24 #include "lldb/Target/StopInfo.h" 25 #include "lldb/Target/Target.h" 26 #include "lldb/Target/Thread.h" 27 #include "lldb/Target/Unwind.h" 28 29 //#define DEBUG_STACK_FRAMES 1 30 31 using namespace lldb; 32 using namespace lldb_private; 33 34 //---------------------------------------------------------------------- 35 // StackFrameList constructor 36 //---------------------------------------------------------------------- 37 StackFrameList::StackFrameList 38 ( 39 Thread &thread, 40 const lldb::StackFrameListSP &prev_frames_sp, 41 bool show_inline_frames 42 ) : 43 m_thread (thread), 44 m_prev_frames_sp (prev_frames_sp), 45 m_mutex (Mutex::eMutexTypeRecursive), 46 m_frames (), 47 m_selected_frame_idx (0), 48 m_concrete_frames_fetched (0), 49 m_current_inlined_depth (UINT32_MAX), 50 m_current_inlined_pc (LLDB_INVALID_ADDRESS), 51 m_show_inlined_frames (show_inline_frames) 52 { 53 if (prev_frames_sp) 54 { 55 m_current_inlined_depth = prev_frames_sp->m_current_inlined_depth; 56 m_current_inlined_pc = prev_frames_sp->m_current_inlined_pc; 57 } 58 } 59 60 //---------------------------------------------------------------------- 61 // Destructor 62 //---------------------------------------------------------------------- 63 StackFrameList::~StackFrameList() 64 { 65 } 66 67 void 68 StackFrameList::CalculateCurrentInlinedDepth() 69 { 70 uint32_t cur_inlined_depth = GetCurrentInlinedDepth(); 71 if (cur_inlined_depth == UINT32_MAX) 72 { 73 ResetCurrentInlinedDepth(); 74 } 75 } 76 77 uint32_t 78 StackFrameList::GetCurrentInlinedDepth () 79 { 80 if (m_show_inlined_frames) 81 { 82 lldb::addr_t cur_pc = m_thread.GetRegisterContext()->GetPC(); 83 if (cur_pc != m_current_inlined_pc) 84 { 85 m_current_inlined_pc = LLDB_INVALID_ADDRESS; 86 m_current_inlined_depth = UINT32_MAX; 87 } 88 return m_current_inlined_depth; 89 } 90 else 91 { 92 return UINT32_MAX; 93 } 94 } 95 96 void 97 StackFrameList::ResetCurrentInlinedDepth () 98 { 99 if (m_show_inlined_frames) 100 { 101 GetFramesUpTo(0); 102 if (!m_frames[0]->IsInlined()) 103 { 104 m_current_inlined_depth = UINT32_MAX; 105 m_current_inlined_pc = LLDB_INVALID_ADDRESS; 106 } 107 else 108 { 109 // We only need to do something special about inlined blocks when we 110 // are at the beginning of an inlined function: 111 // FIXME: We probably also have to do something special if the PC is at the END 112 // of an inlined function, which coincides with the end of either its containing 113 // function or another inlined function. 114 115 lldb::addr_t curr_pc = m_thread.GetRegisterContext()->GetPC(); 116 Block *block_ptr = m_frames[0]->GetFrameBlock(); 117 if (block_ptr) 118 { 119 Address pc_as_address; 120 pc_as_address.SetLoadAddress(curr_pc, &(m_thread.GetProcess()->GetTarget())); 121 AddressRange containing_range; 122 if (block_ptr->GetRangeContainingAddress(pc_as_address, containing_range)) 123 { 124 if (pc_as_address == containing_range.GetBaseAddress()) 125 { 126 // If we got here because of a breakpoint hit, then set the inlined depth depending on where 127 // the breakpoint was set. 128 // If we got here because of a crash, then set the inlined depth to the deepest most block. 129 // Otherwise, we stopped here naturally as the result of a step, so set ourselves in the 130 // containing frame of the whole set of nested inlines, so the user can then "virtually" 131 // step into the frames one by one, or next over the whole mess. 132 // Note: We don't have to handle being somewhere in the middle of the stack here, since 133 // ResetCurrentInlinedDepth doesn't get called if there is a valid inlined depth set. 134 StopInfoSP stop_info_sp = m_thread.GetStopInfo(); 135 if (stop_info_sp) 136 { 137 switch (stop_info_sp->GetStopReason()) 138 { 139 case eStopReasonBreakpoint: 140 { 141 142 } 143 break; 144 case eStopReasonWatchpoint: 145 case eStopReasonException: 146 case eStopReasonSignal: 147 // In all these cases we want to stop in the deepest most frame. 148 m_current_inlined_pc = curr_pc; 149 m_current_inlined_depth = 0; 150 break; 151 default: 152 { 153 // Otherwise, we should set ourselves at the container of the inlining, so that the 154 // user can descend into them. 155 // So first we check whether we have more than one inlined block sharing this PC: 156 int num_inlined_functions = 0; 157 158 for (Block *container_ptr = block_ptr->GetInlinedParent(); 159 container_ptr != NULL; 160 container_ptr = container_ptr->GetInlinedParent()) 161 { 162 if (!container_ptr->GetRangeContainingAddress(pc_as_address, containing_range)) 163 break; 164 if (pc_as_address != containing_range.GetBaseAddress()) 165 break; 166 167 num_inlined_functions++; 168 } 169 m_current_inlined_pc = curr_pc; 170 m_current_inlined_depth = num_inlined_functions + 1; 171 172 } 173 break; 174 } 175 } 176 } 177 } 178 } 179 } 180 } 181 } 182 183 bool 184 StackFrameList::DecrementCurrentInlinedDepth () 185 { 186 if (m_show_inlined_frames) 187 { 188 uint32_t current_inlined_depth = GetCurrentInlinedDepth(); 189 if (current_inlined_depth != UINT32_MAX) 190 { 191 if (current_inlined_depth > 0) 192 m_current_inlined_depth--; 193 return true; 194 } 195 } 196 return false; 197 } 198 199 void 200 StackFrameList::GetFramesUpTo(uint32_t end_idx) 201 { 202 // We've already gotten more frames than asked for, or we've already finished unwinding, return. 203 if (m_frames.size() > end_idx || GetAllFramesFetched()) 204 return; 205 206 Unwind *unwinder = m_thread.GetUnwinder (); 207 208 if (m_show_inlined_frames) 209 { 210 #if defined (DEBUG_STACK_FRAMES) 211 StreamFile s(stdout, false); 212 #endif 213 // If we are hiding some frames from the outside world, we need to add those onto the total count of 214 // frames to fetch. However, we don't need ot do that if end_idx is 0 since in that case we always 215 // get the first concrete frame and all the inlined frames below it... 216 217 uint32_t inlined_depth = 0; 218 if (end_idx > 0) 219 { 220 inlined_depth = GetCurrentInlinedDepth(); 221 if (inlined_depth != UINT32_MAX) 222 { 223 if (end_idx > 0) 224 end_idx += inlined_depth; 225 } 226 else 227 inlined_depth = 0; 228 } 229 230 StackFrameSP unwind_frame_sp; 231 do 232 { 233 uint32_t idx = m_concrete_frames_fetched++; 234 lldb::addr_t pc; 235 lldb::addr_t cfa; 236 if (idx == 0) 237 { 238 // We might have already created frame zero, only create it 239 // if we need to 240 if (m_frames.empty()) 241 { 242 m_thread.GetRegisterContext(); 243 assert (m_thread.m_reg_context_sp.get()); 244 245 const bool success = unwinder->GetFrameInfoAtIndex(idx, cfa, pc); 246 // There shouldn't be any way not to get the frame info for frame 0. 247 // But if the unwinder can't make one, lets make one by hand with the 248 // SP as the CFA and see if that gets any further. 249 if (!success) 250 { 251 cfa = m_thread.GetRegisterContext()->GetSP(); 252 pc = m_thread.GetRegisterContext()->GetPC(); 253 } 254 255 unwind_frame_sp.reset (new StackFrame (m_thread.shared_from_this(), 256 m_frames.size(), 257 idx, 258 m_thread.m_reg_context_sp, 259 cfa, 260 pc, 261 NULL)); 262 m_frames.push_back (unwind_frame_sp); 263 } 264 else 265 { 266 unwind_frame_sp = m_frames.front(); 267 cfa = unwind_frame_sp->m_id.GetCallFrameAddress(); 268 } 269 } 270 else 271 { 272 const bool success = unwinder->GetFrameInfoAtIndex(idx, cfa, pc); 273 if (!success) 274 { 275 // We've gotten to the end of the stack. 276 SetAllFramesFetched(); 277 break; 278 } 279 unwind_frame_sp.reset (new StackFrame (m_thread.shared_from_this(), m_frames.size(), idx, cfa, pc, NULL)); 280 m_frames.push_back (unwind_frame_sp); 281 } 282 283 SymbolContext unwind_sc = unwind_frame_sp->GetSymbolContext (eSymbolContextBlock | eSymbolContextFunction); 284 Block *unwind_block = unwind_sc.block; 285 if (unwind_block) 286 { 287 Address curr_frame_address (unwind_frame_sp->GetFrameCodeAddress()); 288 // Be sure to adjust the frame address to match the address 289 // that was used to lookup the symbol context above. If we are 290 // in the first concrete frame, then we lookup using the current 291 // address, else we decrement the address by one to get the correct 292 // location. 293 if (idx > 0) 294 curr_frame_address.Slide(-1); 295 296 SymbolContext next_frame_sc; 297 Address next_frame_address; 298 299 while (unwind_sc.GetParentOfInlinedScope(curr_frame_address, next_frame_sc, next_frame_address)) 300 { 301 StackFrameSP frame_sp(new StackFrame (m_thread.shared_from_this(), 302 m_frames.size(), 303 idx, 304 unwind_frame_sp->GetRegisterContextSP (), 305 cfa, 306 next_frame_address, 307 &next_frame_sc)); 308 309 m_frames.push_back (frame_sp); 310 unwind_sc = next_frame_sc; 311 curr_frame_address = next_frame_address; 312 } 313 } 314 } while (m_frames.size() - 1 < end_idx); 315 316 // Don't try to merge till you've calculated all the frames in this stack. 317 if (GetAllFramesFetched() && m_prev_frames_sp) 318 { 319 StackFrameList *prev_frames = m_prev_frames_sp.get(); 320 StackFrameList *curr_frames = this; 321 322 #if defined (DEBUG_STACK_FRAMES) 323 s.PutCString("\nprev_frames:\n"); 324 prev_frames->Dump (&s); 325 s.PutCString("\ncurr_frames:\n"); 326 curr_frames->Dump (&s); 327 s.EOL(); 328 #endif 329 size_t curr_frame_num, prev_frame_num; 330 331 for (curr_frame_num = curr_frames->m_frames.size(), prev_frame_num = prev_frames->m_frames.size(); 332 curr_frame_num > 0 && prev_frame_num > 0; 333 --curr_frame_num, --prev_frame_num) 334 { 335 const size_t curr_frame_idx = curr_frame_num-1; 336 const size_t prev_frame_idx = prev_frame_num-1; 337 StackFrameSP curr_frame_sp (curr_frames->m_frames[curr_frame_idx]); 338 StackFrameSP prev_frame_sp (prev_frames->m_frames[prev_frame_idx]); 339 340 #if defined (DEBUG_STACK_FRAMES) 341 s.Printf("\n\nCurr frame #%u ", curr_frame_idx); 342 if (curr_frame_sp) 343 curr_frame_sp->Dump (&s, true, false); 344 else 345 s.PutCString("NULL"); 346 s.Printf("\nPrev frame #%u ", prev_frame_idx); 347 if (prev_frame_sp) 348 prev_frame_sp->Dump (&s, true, false); 349 else 350 s.PutCString("NULL"); 351 #endif 352 353 StackFrame *curr_frame = curr_frame_sp.get(); 354 StackFrame *prev_frame = prev_frame_sp.get(); 355 356 if (curr_frame == NULL || prev_frame == NULL) 357 break; 358 359 // Check the stack ID to make sure they are equal 360 if (curr_frame->GetStackID() != prev_frame->GetStackID()) 361 break; 362 363 prev_frame->UpdatePreviousFrameFromCurrentFrame (*curr_frame); 364 // Now copy the fixed up previous frame into the current frames 365 // so the pointer doesn't change 366 m_frames[curr_frame_idx] = prev_frame_sp; 367 //curr_frame->UpdateCurrentFrameFromPreviousFrame (*prev_frame); 368 369 #if defined (DEBUG_STACK_FRAMES) 370 s.Printf("\n Copying previous frame to current frame"); 371 #endif 372 } 373 // We are done with the old stack frame list, we can release it now 374 m_prev_frames_sp.reset(); 375 } 376 377 #if defined (DEBUG_STACK_FRAMES) 378 s.PutCString("\n\nNew frames:\n"); 379 Dump (&s); 380 s.EOL(); 381 #endif 382 } 383 else 384 { 385 if (end_idx < m_concrete_frames_fetched) 386 return; 387 388 uint32_t num_frames = unwinder->GetFramesUpTo(end_idx); 389 if (num_frames <= end_idx + 1) 390 { 391 //Done unwinding. 392 m_concrete_frames_fetched = UINT32_MAX; 393 } 394 m_frames.resize(num_frames); 395 } 396 } 397 398 uint32_t 399 StackFrameList::GetNumFrames (bool can_create) 400 { 401 Mutex::Locker locker (m_mutex); 402 403 if (can_create) 404 GetFramesUpTo (UINT32_MAX); 405 406 uint32_t inlined_depth = GetCurrentInlinedDepth(); 407 if (inlined_depth == UINT32_MAX) 408 return m_frames.size(); 409 else 410 return m_frames.size() - inlined_depth; 411 } 412 413 void 414 StackFrameList::Dump (Stream *s) 415 { 416 if (s == NULL) 417 return; 418 Mutex::Locker locker (m_mutex); 419 420 const_iterator pos, begin = m_frames.begin(), end = m_frames.end(); 421 for (pos = begin; pos != end; ++pos) 422 { 423 StackFrame *frame = (*pos).get(); 424 s->Printf("%p: ", frame); 425 if (frame) 426 { 427 frame->GetStackID().Dump (s); 428 frame->DumpUsingSettingsFormat (s); 429 } 430 else 431 s->Printf("frame #%u", (uint32_t)std::distance (begin, pos)); 432 s->EOL(); 433 } 434 s->EOL(); 435 } 436 437 StackFrameSP 438 StackFrameList::GetFrameAtIndex (uint32_t idx) 439 { 440 StackFrameSP frame_sp; 441 Mutex::Locker locker (m_mutex); 442 uint32_t inlined_depth = GetCurrentInlinedDepth(); 443 if (inlined_depth != UINT32_MAX) 444 idx += inlined_depth; 445 446 if (idx < m_frames.size()) 447 frame_sp = m_frames[idx]; 448 449 if (frame_sp) 450 return frame_sp; 451 452 // GetFramesUpTo will fill m_frames with as many frames as you asked for, 453 // if there are that many. If there weren't then you asked for too many 454 // frames. 455 GetFramesUpTo (idx); 456 if (idx < m_frames.size()) 457 { 458 if (m_show_inlined_frames) 459 { 460 // When inline frames are enabled we actually create all the frames in GetFramesUpTo. 461 frame_sp = m_frames[idx]; 462 } 463 else 464 { 465 Unwind *unwinder = m_thread.GetUnwinder (); 466 if (unwinder) 467 { 468 addr_t pc, cfa; 469 if (unwinder->GetFrameInfoAtIndex(idx, cfa, pc)) 470 { 471 frame_sp.reset (new StackFrame (m_thread.shared_from_this(), idx, idx, cfa, pc, NULL)); 472 473 Function *function = frame_sp->GetSymbolContext (eSymbolContextFunction).function; 474 if (function) 475 { 476 // When we aren't showing inline functions we always use 477 // the top most function block as the scope. 478 frame_sp->SetSymbolContextScope (&function->GetBlock(false)); 479 } 480 else 481 { 482 // Set the symbol scope from the symbol regardless if it is NULL or valid. 483 frame_sp->SetSymbolContextScope (frame_sp->GetSymbolContext (eSymbolContextSymbol).symbol); 484 } 485 SetFrameAtIndex(idx, frame_sp); 486 } 487 } 488 } 489 } 490 return frame_sp; 491 } 492 493 StackFrameSP 494 StackFrameList::GetFrameWithConcreteFrameIndex (uint32_t unwind_idx) 495 { 496 // First try assuming the unwind index is the same as the frame index. The 497 // unwind index is always greater than or equal to the frame index, so it 498 // is a good place to start. If we have inlined frames we might have 5 499 // concrete frames (frame unwind indexes go from 0-4), but we might have 15 500 // frames after we make all the inlined frames. Most of the time the unwind 501 // frame index (or the concrete frame index) is the same as the frame index. 502 uint32_t frame_idx = unwind_idx; 503 StackFrameSP frame_sp (GetFrameAtIndex (frame_idx)); 504 while (frame_sp) 505 { 506 if (frame_sp->GetFrameIndex() == unwind_idx) 507 break; 508 frame_sp = GetFrameAtIndex (++frame_idx); 509 } 510 return frame_sp; 511 } 512 513 StackFrameSP 514 StackFrameList::GetFrameWithStackID (const StackID &stack_id) 515 { 516 uint32_t frame_idx = 0; 517 StackFrameSP frame_sp; 518 do 519 { 520 frame_sp = GetFrameAtIndex (frame_idx); 521 if (frame_sp && frame_sp->GetStackID() == stack_id) 522 break; 523 frame_idx++; 524 } 525 while (frame_sp); 526 return frame_sp; 527 } 528 529 bool 530 StackFrameList::SetFrameAtIndex (uint32_t idx, StackFrameSP &frame_sp) 531 { 532 if (idx >= m_frames.size()) 533 m_frames.resize(idx + 1); 534 // Make sure allocation succeeded by checking bounds again 535 if (idx < m_frames.size()) 536 { 537 m_frames[idx] = frame_sp; 538 return true; 539 } 540 return false; // resize failed, out of memory? 541 } 542 543 uint32_t 544 StackFrameList::GetSelectedFrameIndex () const 545 { 546 Mutex::Locker locker (m_mutex); 547 return m_selected_frame_idx; 548 } 549 550 551 uint32_t 552 StackFrameList::SetSelectedFrame (lldb_private::StackFrame *frame) 553 { 554 Mutex::Locker locker (m_mutex); 555 const_iterator pos; 556 const_iterator begin = m_frames.begin(); 557 const_iterator end = m_frames.end(); 558 m_selected_frame_idx = 0; 559 for (pos = begin; pos != end; ++pos) 560 { 561 if (pos->get() == frame) 562 { 563 m_selected_frame_idx = std::distance (begin, pos); 564 uint32_t inlined_depth = GetCurrentInlinedDepth(); 565 if (inlined_depth != UINT32_MAX) 566 m_selected_frame_idx -= inlined_depth; 567 break; 568 } 569 } 570 SetDefaultFileAndLineToSelectedFrame(); 571 return m_selected_frame_idx; 572 } 573 574 // Mark a stack frame as the current frame using the frame index 575 bool 576 StackFrameList::SetSelectedFrameByIndex (uint32_t idx) 577 { 578 Mutex::Locker locker (m_mutex); 579 StackFrameSP frame_sp (GetFrameAtIndex (idx)); 580 if (frame_sp) 581 { 582 SetSelectedFrame(frame_sp.get()); 583 return true; 584 } 585 else 586 return false; 587 } 588 589 void 590 StackFrameList::SetDefaultFileAndLineToSelectedFrame() 591 { 592 if (m_thread.GetID() == m_thread.GetProcess()->GetThreadList().GetSelectedThread()->GetID()) 593 { 594 StackFrameSP frame_sp (GetFrameAtIndex (GetSelectedFrameIndex())); 595 if (frame_sp) 596 { 597 SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextLineEntry); 598 if (sc.line_entry.file) 599 m_thread.CalculateTarget()->GetSourceManager().SetDefaultFileAndLine (sc.line_entry.file, 600 sc.line_entry.line); 601 } 602 } 603 } 604 605 // The thread has been run, reset the number stack frames to zero so we can 606 // determine how many frames we have lazily. 607 void 608 StackFrameList::Clear () 609 { 610 Mutex::Locker locker (m_mutex); 611 m_frames.clear(); 612 m_concrete_frames_fetched = 0; 613 } 614 615 void 616 StackFrameList::InvalidateFrames (uint32_t start_idx) 617 { 618 Mutex::Locker locker (m_mutex); 619 if (m_show_inlined_frames) 620 { 621 Clear(); 622 } 623 else 624 { 625 const size_t num_frames = m_frames.size(); 626 while (start_idx < num_frames) 627 { 628 m_frames[start_idx].reset(); 629 ++start_idx; 630 } 631 } 632 } 633 634 void 635 StackFrameList::Merge (std::auto_ptr<StackFrameList>& curr_ap, lldb::StackFrameListSP& prev_sp) 636 { 637 Mutex::Locker curr_locker (curr_ap.get() ? &curr_ap->m_mutex : NULL); 638 Mutex::Locker prev_locker (prev_sp.get() ? &prev_sp->m_mutex : NULL); 639 640 #if defined (DEBUG_STACK_FRAMES) 641 StreamFile s(stdout, false); 642 s.PutCString("\n\nStackFrameList::Merge():\nPrev:\n"); 643 if (prev_sp.get()) 644 prev_sp->Dump (&s); 645 else 646 s.PutCString ("NULL"); 647 s.PutCString("\nCurr:\n"); 648 if (curr_ap.get()) 649 curr_ap->Dump (&s); 650 else 651 s.PutCString ("NULL"); 652 s.EOL(); 653 #endif 654 655 if (curr_ap.get() == NULL || curr_ap->GetNumFrames (false) == 0) 656 { 657 #if defined (DEBUG_STACK_FRAMES) 658 s.PutCString("No current frames, leave previous frames alone...\n"); 659 #endif 660 curr_ap.release(); 661 return; 662 } 663 664 if (prev_sp.get() == NULL || prev_sp->GetNumFrames (false) == 0) 665 { 666 #if defined (DEBUG_STACK_FRAMES) 667 s.PutCString("No previous frames, so use current frames...\n"); 668 #endif 669 // We either don't have any previous frames, or since we have more than 670 // one current frames it means we have all the frames and can safely 671 // replace our previous frames. 672 prev_sp.reset (curr_ap.release()); 673 return; 674 } 675 676 const uint32_t num_curr_frames = curr_ap->GetNumFrames (false); 677 678 if (num_curr_frames > 1) 679 { 680 #if defined (DEBUG_STACK_FRAMES) 681 s.PutCString("We have more than one current frame, so use current frames...\n"); 682 #endif 683 // We have more than one current frames it means we have all the frames 684 // and can safely replace our previous frames. 685 prev_sp.reset (curr_ap.release()); 686 687 #if defined (DEBUG_STACK_FRAMES) 688 s.PutCString("\nMerged:\n"); 689 prev_sp->Dump (&s); 690 #endif 691 return; 692 } 693 694 StackFrameSP prev_frame_zero_sp(prev_sp->GetFrameAtIndex (0)); 695 StackFrameSP curr_frame_zero_sp(curr_ap->GetFrameAtIndex (0)); 696 StackID curr_stack_id (curr_frame_zero_sp->GetStackID()); 697 StackID prev_stack_id (prev_frame_zero_sp->GetStackID()); 698 699 #if defined (DEBUG_STACK_FRAMES) 700 const uint32_t num_prev_frames = prev_sp->GetNumFrames (false); 701 s.Printf("\n%u previous frames with one current frame\n", num_prev_frames); 702 #endif 703 704 // We have only a single current frame 705 // Our previous stack frames only had a single frame as well... 706 if (curr_stack_id == prev_stack_id) 707 { 708 #if defined (DEBUG_STACK_FRAMES) 709 s.Printf("\nPrevious frame #0 is same as current frame #0, merge the cached data\n"); 710 #endif 711 712 curr_frame_zero_sp->UpdateCurrentFrameFromPreviousFrame (*prev_frame_zero_sp); 713 // prev_frame_zero_sp->UpdatePreviousFrameFromCurrentFrame (*curr_frame_zero_sp); 714 // prev_sp->SetFrameAtIndex (0, prev_frame_zero_sp); 715 } 716 else if (curr_stack_id < prev_stack_id) 717 { 718 #if defined (DEBUG_STACK_FRAMES) 719 s.Printf("\nCurrent frame #0 has a stack ID that is less than the previous frame #0, insert current frame zero in front of previous\n"); 720 #endif 721 prev_sp->m_frames.insert (prev_sp->m_frames.begin(), curr_frame_zero_sp); 722 } 723 724 curr_ap.release(); 725 726 #if defined (DEBUG_STACK_FRAMES) 727 s.PutCString("\nMerged:\n"); 728 prev_sp->Dump (&s); 729 #endif 730 731 732 } 733 734 lldb::StackFrameSP 735 StackFrameList::GetStackFrameSPForStackFramePtr (StackFrame *stack_frame_ptr) 736 { 737 const_iterator pos; 738 const_iterator begin = m_frames.begin(); 739 const_iterator end = m_frames.end(); 740 lldb::StackFrameSP ret_sp; 741 742 for (pos = begin; pos != end; ++pos) 743 { 744 if (pos->get() == stack_frame_ptr) 745 { 746 ret_sp = (*pos); 747 break; 748 } 749 } 750 return ret_sp; 751 } 752 753 size_t 754 StackFrameList::GetStatus (Stream& strm, 755 uint32_t first_frame, 756 uint32_t num_frames, 757 bool show_frame_info, 758 uint32_t num_frames_with_source) 759 { 760 size_t num_frames_displayed = 0; 761 762 if (num_frames == 0) 763 return 0; 764 765 StackFrameSP frame_sp; 766 uint32_t frame_idx = 0; 767 uint32_t last_frame; 768 769 // Don't let the last frame wrap around... 770 if (num_frames == UINT32_MAX) 771 last_frame = UINT32_MAX; 772 else 773 last_frame = first_frame + num_frames; 774 775 for (frame_idx = first_frame; frame_idx < last_frame; ++frame_idx) 776 { 777 frame_sp = GetFrameAtIndex(frame_idx); 778 if (frame_sp.get() == NULL) 779 break; 780 781 if (!frame_sp->GetStatus (strm, 782 show_frame_info, 783 num_frames_with_source > (first_frame - frame_idx))) 784 break; 785 ++num_frames_displayed; 786 } 787 788 strm.IndentLess(); 789 return num_frames_displayed; 790 } 791 792