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/Breakpoint/BreakpointLocation.h" 17 #include "lldb/Breakpoint/Breakpoint.h" 18 #include "lldb/Core/Log.h" 19 #include "lldb/Core/StreamFile.h" 20 #include "lldb/Core/SourceManager.h" 21 #include "lldb/Symbol/Block.h" 22 #include "lldb/Symbol/Function.h" 23 #include "lldb/Symbol/Symbol.h" 24 #include "lldb/Target/Process.h" 25 #include "lldb/Target/RegisterContext.h" 26 #include "lldb/Target/StackFrame.h" 27 #include "lldb/Target/StopInfo.h" 28 #include "lldb/Target/Target.h" 29 #include "lldb/Target/Thread.h" 30 #include "lldb/Target/Unwind.h" 31 32 //#define DEBUG_STACK_FRAMES 1 33 34 using namespace lldb; 35 using namespace lldb_private; 36 37 //---------------------------------------------------------------------- 38 // StackFrameList constructor 39 //---------------------------------------------------------------------- 40 StackFrameList::StackFrameList 41 ( 42 Thread &thread, 43 const lldb::StackFrameListSP &prev_frames_sp, 44 bool show_inline_frames 45 ) : 46 m_thread (thread), 47 m_prev_frames_sp (prev_frames_sp), 48 m_mutex (Mutex::eMutexTypeRecursive), 49 m_frames (), 50 m_selected_frame_idx (0), 51 m_concrete_frames_fetched (0), 52 m_current_inlined_depth (UINT32_MAX), 53 m_current_inlined_pc (LLDB_INVALID_ADDRESS), 54 m_show_inlined_frames (show_inline_frames) 55 { 56 if (prev_frames_sp) 57 { 58 m_current_inlined_depth = prev_frames_sp->m_current_inlined_depth; 59 m_current_inlined_pc = prev_frames_sp->m_current_inlined_pc; 60 } 61 } 62 63 //---------------------------------------------------------------------- 64 // Destructor 65 //---------------------------------------------------------------------- 66 StackFrameList::~StackFrameList() 67 { 68 // Call clear since this takes a lock and clears the stack frame list 69 // in case another thread is currently using this stack frame list 70 Clear(); 71 } 72 73 void 74 StackFrameList::CalculateCurrentInlinedDepth() 75 { 76 uint32_t cur_inlined_depth = GetCurrentInlinedDepth(); 77 if (cur_inlined_depth == UINT32_MAX) 78 { 79 ResetCurrentInlinedDepth(); 80 } 81 } 82 83 uint32_t 84 StackFrameList::GetCurrentInlinedDepth () 85 { 86 if (m_show_inlined_frames && m_current_inlined_pc != LLDB_INVALID_ADDRESS) 87 { 88 lldb::addr_t cur_pc = m_thread.GetRegisterContext()->GetPC(); 89 if (cur_pc != m_current_inlined_pc) 90 { 91 m_current_inlined_pc = LLDB_INVALID_ADDRESS; 92 m_current_inlined_depth = UINT32_MAX; 93 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 94 if (log && log->GetVerbose()) 95 log->Printf ("GetCurrentInlinedDepth: invalidating current inlined depth.\n"); 96 } 97 return m_current_inlined_depth; 98 } 99 else 100 { 101 return UINT32_MAX; 102 } 103 } 104 105 void 106 StackFrameList::ResetCurrentInlinedDepth () 107 { 108 if (m_show_inlined_frames) 109 { 110 GetFramesUpTo(0); 111 if (!m_frames[0]->IsInlined()) 112 { 113 m_current_inlined_depth = UINT32_MAX; 114 m_current_inlined_pc = LLDB_INVALID_ADDRESS; 115 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 116 if (log && log->GetVerbose()) 117 log->Printf ("ResetCurrentInlinedDepth: Invalidating current inlined depth.\n"); 118 } 119 else 120 { 121 // We only need to do something special about inlined blocks when we 122 // are at the beginning of an inlined function: 123 // FIXME: We probably also have to do something special if the PC is at the END 124 // of an inlined function, which coincides with the end of either its containing 125 // function or another inlined function. 126 127 lldb::addr_t curr_pc = m_thread.GetRegisterContext()->GetPC(); 128 Block *block_ptr = m_frames[0]->GetFrameBlock(); 129 if (block_ptr) 130 { 131 Address pc_as_address; 132 pc_as_address.SetLoadAddress(curr_pc, &(m_thread.GetProcess()->GetTarget())); 133 AddressRange containing_range; 134 if (block_ptr->GetRangeContainingAddress(pc_as_address, containing_range)) 135 { 136 if (pc_as_address == containing_range.GetBaseAddress()) 137 { 138 // If we got here because of a breakpoint hit, then set the inlined depth depending on where 139 // the breakpoint was set. 140 // If we got here because of a crash, then set the inlined depth to the deepest most block. 141 // Otherwise, we stopped here naturally as the result of a step, so set ourselves in the 142 // containing frame of the whole set of nested inlines, so the user can then "virtually" 143 // step into the frames one by one, or next over the whole mess. 144 // Note: We don't have to handle being somewhere in the middle of the stack here, since 145 // ResetCurrentInlinedDepth doesn't get called if there is a valid inlined depth set. 146 StopInfoSP stop_info_sp = m_thread.GetStopInfo(); 147 if (stop_info_sp) 148 { 149 switch (stop_info_sp->GetStopReason()) 150 { 151 case eStopReasonWatchpoint: 152 case eStopReasonException: 153 case eStopReasonExec: 154 case eStopReasonSignal: 155 // In all these cases we want to stop in the deepest most frame. 156 m_current_inlined_pc = curr_pc; 157 m_current_inlined_depth = 0; 158 break; 159 case eStopReasonBreakpoint: 160 { 161 // FIXME: Figure out what this break point is doing, and set the inline depth 162 // appropriately. Be careful to take into account breakpoints that implement 163 // step over prologue, since that should do the default calculation. 164 // For now, if the breakpoints corresponding to this hit are all internal, 165 // I set the stop location to the top of the inlined stack, since that will make 166 // things like stepping over prologues work right. But if there are any non-internal 167 // breakpoints I do to the bottom of the stack, since that was the old behavior. 168 uint32_t bp_site_id = stop_info_sp->GetValue(); 169 BreakpointSiteSP bp_site_sp(m_thread.GetProcess()->GetBreakpointSiteList().FindByID(bp_site_id)); 170 bool all_internal = true; 171 if (bp_site_sp) 172 { 173 uint32_t num_owners = bp_site_sp->GetNumberOfOwners(); 174 for (uint32_t i = 0; i < num_owners; i++) 175 { 176 Breakpoint &bp_ref = bp_site_sp->GetOwnerAtIndex(i)->GetBreakpoint(); 177 if (!bp_ref.IsInternal()) 178 { 179 all_internal = false; 180 } 181 } 182 } 183 if (!all_internal) 184 { 185 m_current_inlined_pc = curr_pc; 186 m_current_inlined_depth = 0; 187 break; 188 } 189 } 190 default: 191 { 192 // Otherwise, we should set ourselves at the container of the inlining, so that the 193 // user can descend into them. 194 // So first we check whether we have more than one inlined block sharing this PC: 195 int num_inlined_functions = 0; 196 197 for (Block *container_ptr = block_ptr->GetInlinedParent(); 198 container_ptr != NULL; 199 container_ptr = container_ptr->GetInlinedParent()) 200 { 201 if (!container_ptr->GetRangeContainingAddress(pc_as_address, containing_range)) 202 break; 203 if (pc_as_address != containing_range.GetBaseAddress()) 204 break; 205 206 num_inlined_functions++; 207 } 208 m_current_inlined_pc = curr_pc; 209 m_current_inlined_depth = num_inlined_functions + 1; 210 Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 211 if (log && log->GetVerbose()) 212 log->Printf ("ResetCurrentInlinedDepth: setting inlined depth: %d 0x%" PRIx64 ".\n", m_current_inlined_depth, curr_pc); 213 214 } 215 break; 216 } 217 } 218 } 219 } 220 } 221 } 222 } 223 } 224 225 bool 226 StackFrameList::DecrementCurrentInlinedDepth () 227 { 228 if (m_show_inlined_frames) 229 { 230 uint32_t current_inlined_depth = GetCurrentInlinedDepth(); 231 if (current_inlined_depth != UINT32_MAX) 232 { 233 if (current_inlined_depth > 0) 234 { 235 m_current_inlined_depth--; 236 return true; 237 } 238 } 239 } 240 return false; 241 } 242 243 void 244 StackFrameList::SetCurrentInlinedDepth (uint32_t new_depth) 245 { 246 m_current_inlined_depth = new_depth; 247 if (new_depth == UINT32_MAX) 248 m_current_inlined_pc = LLDB_INVALID_ADDRESS; 249 else 250 m_current_inlined_pc = m_thread.GetRegisterContext()->GetPC(); 251 } 252 253 void 254 StackFrameList::GetFramesUpTo(uint32_t end_idx) 255 { 256 // this makes sure we do not fetch frames for an invalid thread 257 if (m_thread.IsValid() == false) 258 return; 259 260 // We've already gotten more frames than asked for, or we've already finished unwinding, return. 261 if (m_frames.size() > end_idx || GetAllFramesFetched()) 262 return; 263 264 Unwind *unwinder = m_thread.GetUnwinder (); 265 266 if (m_show_inlined_frames) 267 { 268 #if defined (DEBUG_STACK_FRAMES) 269 StreamFile s(stdout, false); 270 #endif 271 // If we are hiding some frames from the outside world, we need to add those onto the total count of 272 // frames to fetch. However, we don't need ot do that if end_idx is 0 since in that case we always 273 // get the first concrete frame and all the inlined frames below it... And of course, if end_idx is 274 // UINT32_MAX that means get all, so just do that... 275 276 uint32_t inlined_depth = 0; 277 if (end_idx > 0 && end_idx != UINT32_MAX) 278 { 279 inlined_depth = GetCurrentInlinedDepth(); 280 if (inlined_depth != UINT32_MAX) 281 { 282 if (end_idx > 0) 283 end_idx += inlined_depth; 284 } 285 } 286 287 StackFrameSP unwind_frame_sp; 288 do 289 { 290 uint32_t idx = m_concrete_frames_fetched++; 291 lldb::addr_t pc; 292 lldb::addr_t cfa; 293 if (idx == 0) 294 { 295 // We might have already created frame zero, only create it 296 // if we need to 297 if (m_frames.empty()) 298 { 299 m_thread.GetRegisterContext(); 300 assert (m_thread.m_reg_context_sp.get()); 301 302 const bool success = unwinder->GetFrameInfoAtIndex(idx, cfa, pc); 303 // There shouldn't be any way not to get the frame info for frame 0. 304 // But if the unwinder can't make one, lets make one by hand with the 305 // SP as the CFA and see if that gets any further. 306 if (!success) 307 { 308 cfa = m_thread.GetRegisterContext()->GetSP(); 309 pc = m_thread.GetRegisterContext()->GetPC(); 310 } 311 312 unwind_frame_sp.reset (new StackFrame (m_thread.shared_from_this(), 313 m_frames.size(), 314 idx, 315 m_thread.m_reg_context_sp, 316 cfa, 317 pc, 318 NULL)); 319 m_frames.push_back (unwind_frame_sp); 320 } 321 else 322 { 323 unwind_frame_sp = m_frames.front(); 324 cfa = unwind_frame_sp->m_id.GetCallFrameAddress(); 325 } 326 } 327 else 328 { 329 const bool success = unwinder->GetFrameInfoAtIndex(idx, cfa, pc); 330 if (!success) 331 { 332 // We've gotten to the end of the stack. 333 SetAllFramesFetched(); 334 break; 335 } 336 unwind_frame_sp.reset (new StackFrame (m_thread.shared_from_this(), m_frames.size(), idx, cfa, pc, NULL)); 337 m_frames.push_back (unwind_frame_sp); 338 } 339 340 SymbolContext unwind_sc = unwind_frame_sp->GetSymbolContext (eSymbolContextBlock | eSymbolContextFunction); 341 Block *unwind_block = unwind_sc.block; 342 if (unwind_block) 343 { 344 Address curr_frame_address (unwind_frame_sp->GetFrameCodeAddress()); 345 // Be sure to adjust the frame address to match the address 346 // that was used to lookup the symbol context above. If we are 347 // in the first concrete frame, then we lookup using the current 348 // address, else we decrement the address by one to get the correct 349 // location. 350 if (idx > 0) 351 curr_frame_address.Slide(-1); 352 353 SymbolContext next_frame_sc; 354 Address next_frame_address; 355 356 while (unwind_sc.GetParentOfInlinedScope(curr_frame_address, next_frame_sc, next_frame_address)) 357 { 358 StackFrameSP frame_sp(new StackFrame (m_thread.shared_from_this(), 359 m_frames.size(), 360 idx, 361 unwind_frame_sp->GetRegisterContextSP (), 362 cfa, 363 next_frame_address, 364 &next_frame_sc)); 365 366 m_frames.push_back (frame_sp); 367 unwind_sc = next_frame_sc; 368 curr_frame_address = next_frame_address; 369 } 370 } 371 } while (m_frames.size() - 1 < end_idx); 372 373 // Don't try to merge till you've calculated all the frames in this stack. 374 if (GetAllFramesFetched() && m_prev_frames_sp) 375 { 376 StackFrameList *prev_frames = m_prev_frames_sp.get(); 377 StackFrameList *curr_frames = this; 378 379 //curr_frames->m_current_inlined_depth = prev_frames->m_current_inlined_depth; 380 //curr_frames->m_current_inlined_pc = prev_frames->m_current_inlined_pc; 381 //printf ("GetFramesUpTo: Copying current inlined depth: %d 0x%" PRIx64 ".\n", curr_frames->m_current_inlined_depth, curr_frames->m_current_inlined_pc); 382 383 #if defined (DEBUG_STACK_FRAMES) 384 s.PutCString("\nprev_frames:\n"); 385 prev_frames->Dump (&s); 386 s.PutCString("\ncurr_frames:\n"); 387 curr_frames->Dump (&s); 388 s.EOL(); 389 #endif 390 size_t curr_frame_num, prev_frame_num; 391 392 for (curr_frame_num = curr_frames->m_frames.size(), prev_frame_num = prev_frames->m_frames.size(); 393 curr_frame_num > 0 && prev_frame_num > 0; 394 --curr_frame_num, --prev_frame_num) 395 { 396 const size_t curr_frame_idx = curr_frame_num-1; 397 const size_t prev_frame_idx = prev_frame_num-1; 398 StackFrameSP curr_frame_sp (curr_frames->m_frames[curr_frame_idx]); 399 StackFrameSP prev_frame_sp (prev_frames->m_frames[prev_frame_idx]); 400 401 #if defined (DEBUG_STACK_FRAMES) 402 s.Printf("\n\nCurr frame #%u ", curr_frame_idx); 403 if (curr_frame_sp) 404 curr_frame_sp->Dump (&s, true, false); 405 else 406 s.PutCString("NULL"); 407 s.Printf("\nPrev frame #%u ", prev_frame_idx); 408 if (prev_frame_sp) 409 prev_frame_sp->Dump (&s, true, false); 410 else 411 s.PutCString("NULL"); 412 #endif 413 414 StackFrame *curr_frame = curr_frame_sp.get(); 415 StackFrame *prev_frame = prev_frame_sp.get(); 416 417 if (curr_frame == NULL || prev_frame == NULL) 418 break; 419 420 // Check the stack ID to make sure they are equal 421 if (curr_frame->GetStackID() != prev_frame->GetStackID()) 422 break; 423 424 prev_frame->UpdatePreviousFrameFromCurrentFrame (*curr_frame); 425 // Now copy the fixed up previous frame into the current frames 426 // so the pointer doesn't change 427 m_frames[curr_frame_idx] = prev_frame_sp; 428 //curr_frame->UpdateCurrentFrameFromPreviousFrame (*prev_frame); 429 430 #if defined (DEBUG_STACK_FRAMES) 431 s.Printf("\n Copying previous frame to current frame"); 432 #endif 433 } 434 // We are done with the old stack frame list, we can release it now 435 m_prev_frames_sp.reset(); 436 } 437 438 #if defined (DEBUG_STACK_FRAMES) 439 s.PutCString("\n\nNew frames:\n"); 440 Dump (&s); 441 s.EOL(); 442 #endif 443 } 444 else 445 { 446 if (end_idx < m_concrete_frames_fetched) 447 return; 448 449 uint32_t num_frames = unwinder->GetFramesUpTo(end_idx); 450 if (num_frames <= end_idx + 1) 451 { 452 //Done unwinding. 453 m_concrete_frames_fetched = UINT32_MAX; 454 } 455 m_frames.resize(num_frames); 456 } 457 } 458 459 uint32_t 460 StackFrameList::GetNumFrames (bool can_create) 461 { 462 Mutex::Locker locker (m_mutex); 463 464 if (can_create) 465 GetFramesUpTo (UINT32_MAX); 466 467 uint32_t inlined_depth = GetCurrentInlinedDepth(); 468 if (inlined_depth == UINT32_MAX) 469 return m_frames.size(); 470 else 471 return m_frames.size() - inlined_depth; 472 } 473 474 void 475 StackFrameList::Dump (Stream *s) 476 { 477 if (s == NULL) 478 return; 479 Mutex::Locker locker (m_mutex); 480 481 const_iterator pos, begin = m_frames.begin(), end = m_frames.end(); 482 for (pos = begin; pos != end; ++pos) 483 { 484 StackFrame *frame = (*pos).get(); 485 s->Printf("%p: ", frame); 486 if (frame) 487 { 488 frame->GetStackID().Dump (s); 489 frame->DumpUsingSettingsFormat (s); 490 } 491 else 492 s->Printf("frame #%u", (uint32_t)std::distance (begin, pos)); 493 s->EOL(); 494 } 495 s->EOL(); 496 } 497 498 StackFrameSP 499 StackFrameList::GetFrameAtIndex (uint32_t idx) 500 { 501 StackFrameSP frame_sp; 502 Mutex::Locker locker (m_mutex); 503 uint32_t original_idx = idx; 504 505 uint32_t inlined_depth = GetCurrentInlinedDepth(); 506 if (inlined_depth != UINT32_MAX) 507 idx += inlined_depth; 508 509 if (idx < m_frames.size()) 510 frame_sp = m_frames[idx]; 511 512 if (frame_sp) 513 return frame_sp; 514 515 // GetFramesUpTo will fill m_frames with as many frames as you asked for, 516 // if there are that many. If there weren't then you asked for too many 517 // frames. 518 GetFramesUpTo (idx); 519 if (idx < m_frames.size()) 520 { 521 if (m_show_inlined_frames) 522 { 523 // When inline frames are enabled we actually create all the frames in GetFramesUpTo. 524 frame_sp = m_frames[idx]; 525 } 526 else 527 { 528 Unwind *unwinder = m_thread.GetUnwinder (); 529 if (unwinder) 530 { 531 addr_t pc, cfa; 532 if (unwinder->GetFrameInfoAtIndex(idx, cfa, pc)) 533 { 534 frame_sp.reset (new StackFrame (m_thread.shared_from_this(), idx, idx, cfa, pc, NULL)); 535 536 Function *function = frame_sp->GetSymbolContext (eSymbolContextFunction).function; 537 if (function) 538 { 539 // When we aren't showing inline functions we always use 540 // the top most function block as the scope. 541 frame_sp->SetSymbolContextScope (&function->GetBlock(false)); 542 } 543 else 544 { 545 // Set the symbol scope from the symbol regardless if it is NULL or valid. 546 frame_sp->SetSymbolContextScope (frame_sp->GetSymbolContext (eSymbolContextSymbol).symbol); 547 } 548 SetFrameAtIndex(idx, frame_sp); 549 } 550 } 551 } 552 } 553 else if (original_idx == 0) 554 { 555 // There should ALWAYS be a frame at index 0. If something went wrong with the CurrentInlinedDepth such that 556 // there weren't as many frames as we thought taking that into account, then reset the current inlined depth 557 // and return the real zeroth frame. 558 if (m_frames.size() > 0) 559 { 560 ResetCurrentInlinedDepth(); 561 frame_sp = m_frames[original_idx]; 562 } 563 else 564 { 565 // Why do we have a thread with zero frames, that should not ever happen... 566 if (m_thread.IsValid()) 567 assert ("A valid thread has no frames."); 568 569 } 570 } 571 572 return frame_sp; 573 } 574 575 StackFrameSP 576 StackFrameList::GetFrameWithConcreteFrameIndex (uint32_t unwind_idx) 577 { 578 // First try assuming the unwind index is the same as the frame index. The 579 // unwind index is always greater than or equal to the frame index, so it 580 // is a good place to start. If we have inlined frames we might have 5 581 // concrete frames (frame unwind indexes go from 0-4), but we might have 15 582 // frames after we make all the inlined frames. Most of the time the unwind 583 // frame index (or the concrete frame index) is the same as the frame index. 584 uint32_t frame_idx = unwind_idx; 585 StackFrameSP frame_sp (GetFrameAtIndex (frame_idx)); 586 while (frame_sp) 587 { 588 if (frame_sp->GetFrameIndex() == unwind_idx) 589 break; 590 frame_sp = GetFrameAtIndex (++frame_idx); 591 } 592 return frame_sp; 593 } 594 595 StackFrameSP 596 StackFrameList::GetFrameWithStackID (const StackID &stack_id) 597 { 598 uint32_t frame_idx = 0; 599 StackFrameSP frame_sp; 600 do 601 { 602 frame_sp = GetFrameAtIndex (frame_idx); 603 if (frame_sp && frame_sp->GetStackID() == stack_id) 604 break; 605 frame_idx++; 606 } 607 while (frame_sp); 608 return frame_sp; 609 } 610 611 bool 612 StackFrameList::SetFrameAtIndex (uint32_t idx, StackFrameSP &frame_sp) 613 { 614 if (idx >= m_frames.size()) 615 m_frames.resize(idx + 1); 616 // Make sure allocation succeeded by checking bounds again 617 if (idx < m_frames.size()) 618 { 619 m_frames[idx] = frame_sp; 620 return true; 621 } 622 return false; // resize failed, out of memory? 623 } 624 625 uint32_t 626 StackFrameList::GetSelectedFrameIndex () const 627 { 628 Mutex::Locker locker (m_mutex); 629 return m_selected_frame_idx; 630 } 631 632 633 uint32_t 634 StackFrameList::SetSelectedFrame (lldb_private::StackFrame *frame) 635 { 636 Mutex::Locker locker (m_mutex); 637 const_iterator pos; 638 const_iterator begin = m_frames.begin(); 639 const_iterator end = m_frames.end(); 640 m_selected_frame_idx = 0; 641 for (pos = begin; pos != end; ++pos) 642 { 643 if (pos->get() == frame) 644 { 645 m_selected_frame_idx = std::distance (begin, pos); 646 uint32_t inlined_depth = GetCurrentInlinedDepth(); 647 if (inlined_depth != UINT32_MAX) 648 m_selected_frame_idx -= inlined_depth; 649 break; 650 } 651 } 652 SetDefaultFileAndLineToSelectedFrame(); 653 return m_selected_frame_idx; 654 } 655 656 // Mark a stack frame as the current frame using the frame index 657 bool 658 StackFrameList::SetSelectedFrameByIndex (uint32_t idx) 659 { 660 Mutex::Locker locker (m_mutex); 661 StackFrameSP frame_sp (GetFrameAtIndex (idx)); 662 if (frame_sp) 663 { 664 SetSelectedFrame(frame_sp.get()); 665 return true; 666 } 667 else 668 return false; 669 } 670 671 void 672 StackFrameList::SetDefaultFileAndLineToSelectedFrame() 673 { 674 if (m_thread.GetID() == m_thread.GetProcess()->GetThreadList().GetSelectedThread()->GetID()) 675 { 676 StackFrameSP frame_sp (GetFrameAtIndex (GetSelectedFrameIndex())); 677 if (frame_sp) 678 { 679 SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextLineEntry); 680 if (sc.line_entry.file) 681 m_thread.CalculateTarget()->GetSourceManager().SetDefaultFileAndLine (sc.line_entry.file, 682 sc.line_entry.line); 683 } 684 } 685 } 686 687 // The thread has been run, reset the number stack frames to zero so we can 688 // determine how many frames we have lazily. 689 void 690 StackFrameList::Clear () 691 { 692 Mutex::Locker locker (m_mutex); 693 m_frames.clear(); 694 m_concrete_frames_fetched = 0; 695 } 696 697 void 698 StackFrameList::InvalidateFrames (uint32_t start_idx) 699 { 700 Mutex::Locker locker (m_mutex); 701 if (m_show_inlined_frames) 702 { 703 Clear(); 704 } 705 else 706 { 707 const size_t num_frames = m_frames.size(); 708 while (start_idx < num_frames) 709 { 710 m_frames[start_idx].reset(); 711 ++start_idx; 712 } 713 } 714 } 715 716 void 717 StackFrameList::Merge (std::auto_ptr<StackFrameList>& curr_ap, lldb::StackFrameListSP& prev_sp) 718 { 719 Mutex::Locker curr_locker (curr_ap.get() ? &curr_ap->m_mutex : NULL); 720 Mutex::Locker prev_locker (prev_sp.get() ? &prev_sp->m_mutex : NULL); 721 722 #if defined (DEBUG_STACK_FRAMES) 723 StreamFile s(stdout, false); 724 s.PutCString("\n\nStackFrameList::Merge():\nPrev:\n"); 725 if (prev_sp.get()) 726 prev_sp->Dump (&s); 727 else 728 s.PutCString ("NULL"); 729 s.PutCString("\nCurr:\n"); 730 if (curr_ap.get()) 731 curr_ap->Dump (&s); 732 else 733 s.PutCString ("NULL"); 734 s.EOL(); 735 #endif 736 737 if (curr_ap.get() == NULL || curr_ap->GetNumFrames (false) == 0) 738 { 739 #if defined (DEBUG_STACK_FRAMES) 740 s.PutCString("No current frames, leave previous frames alone...\n"); 741 #endif 742 curr_ap.release(); 743 return; 744 } 745 746 if (prev_sp.get() == NULL || prev_sp->GetNumFrames (false) == 0) 747 { 748 #if defined (DEBUG_STACK_FRAMES) 749 s.PutCString("No previous frames, so use current frames...\n"); 750 #endif 751 // We either don't have any previous frames, or since we have more than 752 // one current frames it means we have all the frames and can safely 753 // replace our previous frames. 754 prev_sp.reset (curr_ap.release()); 755 return; 756 } 757 758 const uint32_t num_curr_frames = curr_ap->GetNumFrames (false); 759 760 if (num_curr_frames > 1) 761 { 762 #if defined (DEBUG_STACK_FRAMES) 763 s.PutCString("We have more than one current frame, so use current frames...\n"); 764 #endif 765 // We have more than one current frames it means we have all the frames 766 // and can safely replace our previous frames. 767 prev_sp.reset (curr_ap.release()); 768 769 #if defined (DEBUG_STACK_FRAMES) 770 s.PutCString("\nMerged:\n"); 771 prev_sp->Dump (&s); 772 #endif 773 return; 774 } 775 776 StackFrameSP prev_frame_zero_sp(prev_sp->GetFrameAtIndex (0)); 777 StackFrameSP curr_frame_zero_sp(curr_ap->GetFrameAtIndex (0)); 778 StackID curr_stack_id (curr_frame_zero_sp->GetStackID()); 779 StackID prev_stack_id (prev_frame_zero_sp->GetStackID()); 780 781 #if defined (DEBUG_STACK_FRAMES) 782 const uint32_t num_prev_frames = prev_sp->GetNumFrames (false); 783 s.Printf("\n%u previous frames with one current frame\n", num_prev_frames); 784 #endif 785 786 // We have only a single current frame 787 // Our previous stack frames only had a single frame as well... 788 if (curr_stack_id == prev_stack_id) 789 { 790 #if defined (DEBUG_STACK_FRAMES) 791 s.Printf("\nPrevious frame #0 is same as current frame #0, merge the cached data\n"); 792 #endif 793 794 curr_frame_zero_sp->UpdateCurrentFrameFromPreviousFrame (*prev_frame_zero_sp); 795 // prev_frame_zero_sp->UpdatePreviousFrameFromCurrentFrame (*curr_frame_zero_sp); 796 // prev_sp->SetFrameAtIndex (0, prev_frame_zero_sp); 797 } 798 else if (curr_stack_id < prev_stack_id) 799 { 800 #if defined (DEBUG_STACK_FRAMES) 801 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"); 802 #endif 803 prev_sp->m_frames.insert (prev_sp->m_frames.begin(), curr_frame_zero_sp); 804 } 805 806 curr_ap.release(); 807 808 #if defined (DEBUG_STACK_FRAMES) 809 s.PutCString("\nMerged:\n"); 810 prev_sp->Dump (&s); 811 #endif 812 813 814 } 815 816 lldb::StackFrameSP 817 StackFrameList::GetStackFrameSPForStackFramePtr (StackFrame *stack_frame_ptr) 818 { 819 const_iterator pos; 820 const_iterator begin = m_frames.begin(); 821 const_iterator end = m_frames.end(); 822 lldb::StackFrameSP ret_sp; 823 824 for (pos = begin; pos != end; ++pos) 825 { 826 if (pos->get() == stack_frame_ptr) 827 { 828 ret_sp = (*pos); 829 break; 830 } 831 } 832 return ret_sp; 833 } 834 835 size_t 836 StackFrameList::GetStatus (Stream& strm, 837 uint32_t first_frame, 838 uint32_t num_frames, 839 bool show_frame_info, 840 uint32_t num_frames_with_source) 841 { 842 size_t num_frames_displayed = 0; 843 844 if (num_frames == 0) 845 return 0; 846 847 StackFrameSP frame_sp; 848 uint32_t frame_idx = 0; 849 uint32_t last_frame; 850 851 // Don't let the last frame wrap around... 852 if (num_frames == UINT32_MAX) 853 last_frame = UINT32_MAX; 854 else 855 last_frame = first_frame + num_frames; 856 857 for (frame_idx = first_frame; frame_idx < last_frame; ++frame_idx) 858 { 859 frame_sp = GetFrameAtIndex(frame_idx); 860 if (frame_sp.get() == NULL) 861 break; 862 863 if (!frame_sp->GetStatus (strm, 864 show_frame_info, 865 num_frames_with_source > (first_frame - frame_idx))) 866 break; 867 ++num_frames_displayed; 868 } 869 870 strm.IndentLess(); 871 return num_frames_displayed; 872 } 873 874