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 RegisterContextSP reg_ctx_sp (m_thread.GetRegisterContext()); 300 301 if (reg_ctx_sp) 302 { 303 304 const bool success = unwinder->GetFrameInfoAtIndex(idx, cfa, pc); 305 // There shouldn't be any way not to get the frame info for frame 0. 306 // But if the unwinder can't make one, lets make one by hand with the 307 // SP as the CFA and see if that gets any further. 308 if (!success) 309 { 310 cfa = reg_ctx_sp->GetSP(); 311 pc = reg_ctx_sp->GetPC(); 312 } 313 314 unwind_frame_sp.reset (new StackFrame (m_thread.shared_from_this(), 315 m_frames.size(), 316 idx, 317 reg_ctx_sp, 318 cfa, 319 pc, 320 NULL)); 321 m_frames.push_back (unwind_frame_sp); 322 } 323 } 324 else 325 { 326 unwind_frame_sp = m_frames.front(); 327 cfa = unwind_frame_sp->m_id.GetCallFrameAddress(); 328 } 329 } 330 else 331 { 332 const bool success = unwinder->GetFrameInfoAtIndex(idx, cfa, pc); 333 if (!success) 334 { 335 // We've gotten to the end of the stack. 336 SetAllFramesFetched(); 337 break; 338 } 339 unwind_frame_sp.reset (new StackFrame (m_thread.shared_from_this(), m_frames.size(), idx, cfa, pc, NULL)); 340 m_frames.push_back (unwind_frame_sp); 341 } 342 343 SymbolContext unwind_sc = unwind_frame_sp->GetSymbolContext (eSymbolContextBlock | eSymbolContextFunction); 344 Block *unwind_block = unwind_sc.block; 345 if (unwind_block) 346 { 347 Address curr_frame_address (unwind_frame_sp->GetFrameCodeAddress()); 348 // Be sure to adjust the frame address to match the address 349 // that was used to lookup the symbol context above. If we are 350 // in the first concrete frame, then we lookup using the current 351 // address, else we decrement the address by one to get the correct 352 // location. 353 if (idx > 0) 354 curr_frame_address.Slide(-1); 355 356 SymbolContext next_frame_sc; 357 Address next_frame_address; 358 359 while (unwind_sc.GetParentOfInlinedScope(curr_frame_address, next_frame_sc, next_frame_address)) 360 { 361 StackFrameSP frame_sp(new StackFrame (m_thread.shared_from_this(), 362 m_frames.size(), 363 idx, 364 unwind_frame_sp->GetRegisterContextSP (), 365 cfa, 366 next_frame_address, 367 &next_frame_sc)); 368 369 m_frames.push_back (frame_sp); 370 unwind_sc = next_frame_sc; 371 curr_frame_address = next_frame_address; 372 } 373 } 374 } while (m_frames.size() - 1 < end_idx); 375 376 // Don't try to merge till you've calculated all the frames in this stack. 377 if (GetAllFramesFetched() && m_prev_frames_sp) 378 { 379 StackFrameList *prev_frames = m_prev_frames_sp.get(); 380 StackFrameList *curr_frames = this; 381 382 //curr_frames->m_current_inlined_depth = prev_frames->m_current_inlined_depth; 383 //curr_frames->m_current_inlined_pc = prev_frames->m_current_inlined_pc; 384 //printf ("GetFramesUpTo: Copying current inlined depth: %d 0x%" PRIx64 ".\n", curr_frames->m_current_inlined_depth, curr_frames->m_current_inlined_pc); 385 386 #if defined (DEBUG_STACK_FRAMES) 387 s.PutCString("\nprev_frames:\n"); 388 prev_frames->Dump (&s); 389 s.PutCString("\ncurr_frames:\n"); 390 curr_frames->Dump (&s); 391 s.EOL(); 392 #endif 393 size_t curr_frame_num, prev_frame_num; 394 395 for (curr_frame_num = curr_frames->m_frames.size(), prev_frame_num = prev_frames->m_frames.size(); 396 curr_frame_num > 0 && prev_frame_num > 0; 397 --curr_frame_num, --prev_frame_num) 398 { 399 const size_t curr_frame_idx = curr_frame_num-1; 400 const size_t prev_frame_idx = prev_frame_num-1; 401 StackFrameSP curr_frame_sp (curr_frames->m_frames[curr_frame_idx]); 402 StackFrameSP prev_frame_sp (prev_frames->m_frames[prev_frame_idx]); 403 404 #if defined (DEBUG_STACK_FRAMES) 405 s.Printf("\n\nCurr frame #%u ", curr_frame_idx); 406 if (curr_frame_sp) 407 curr_frame_sp->Dump (&s, true, false); 408 else 409 s.PutCString("NULL"); 410 s.Printf("\nPrev frame #%u ", prev_frame_idx); 411 if (prev_frame_sp) 412 prev_frame_sp->Dump (&s, true, false); 413 else 414 s.PutCString("NULL"); 415 #endif 416 417 StackFrame *curr_frame = curr_frame_sp.get(); 418 StackFrame *prev_frame = prev_frame_sp.get(); 419 420 if (curr_frame == NULL || prev_frame == NULL) 421 break; 422 423 // Check the stack ID to make sure they are equal 424 if (curr_frame->GetStackID() != prev_frame->GetStackID()) 425 break; 426 427 prev_frame->UpdatePreviousFrameFromCurrentFrame (*curr_frame); 428 // Now copy the fixed up previous frame into the current frames 429 // so the pointer doesn't change 430 m_frames[curr_frame_idx] = prev_frame_sp; 431 //curr_frame->UpdateCurrentFrameFromPreviousFrame (*prev_frame); 432 433 #if defined (DEBUG_STACK_FRAMES) 434 s.Printf("\n Copying previous frame to current frame"); 435 #endif 436 } 437 // We are done with the old stack frame list, we can release it now 438 m_prev_frames_sp.reset(); 439 } 440 441 #if defined (DEBUG_STACK_FRAMES) 442 s.PutCString("\n\nNew frames:\n"); 443 Dump (&s); 444 s.EOL(); 445 #endif 446 } 447 else 448 { 449 if (end_idx < m_concrete_frames_fetched) 450 return; 451 452 uint32_t num_frames = unwinder->GetFramesUpTo(end_idx); 453 if (num_frames <= end_idx + 1) 454 { 455 //Done unwinding. 456 m_concrete_frames_fetched = UINT32_MAX; 457 } 458 m_frames.resize(num_frames); 459 } 460 } 461 462 uint32_t 463 StackFrameList::GetNumFrames (bool can_create) 464 { 465 Mutex::Locker locker (m_mutex); 466 467 if (can_create) 468 GetFramesUpTo (UINT32_MAX); 469 470 uint32_t inlined_depth = GetCurrentInlinedDepth(); 471 if (inlined_depth == UINT32_MAX) 472 return m_frames.size(); 473 else 474 return m_frames.size() - inlined_depth; 475 } 476 477 void 478 StackFrameList::Dump (Stream *s) 479 { 480 if (s == NULL) 481 return; 482 Mutex::Locker locker (m_mutex); 483 484 const_iterator pos, begin = m_frames.begin(), end = m_frames.end(); 485 for (pos = begin; pos != end; ++pos) 486 { 487 StackFrame *frame = (*pos).get(); 488 s->Printf("%p: ", frame); 489 if (frame) 490 { 491 frame->GetStackID().Dump (s); 492 frame->DumpUsingSettingsFormat (s); 493 } 494 else 495 s->Printf("frame #%u", (uint32_t)std::distance (begin, pos)); 496 s->EOL(); 497 } 498 s->EOL(); 499 } 500 501 StackFrameSP 502 StackFrameList::GetFrameAtIndex (uint32_t idx) 503 { 504 StackFrameSP frame_sp; 505 Mutex::Locker locker (m_mutex); 506 uint32_t original_idx = idx; 507 508 uint32_t inlined_depth = GetCurrentInlinedDepth(); 509 if (inlined_depth != UINT32_MAX) 510 idx += inlined_depth; 511 512 if (idx < m_frames.size()) 513 frame_sp = m_frames[idx]; 514 515 if (frame_sp) 516 return frame_sp; 517 518 // GetFramesUpTo will fill m_frames with as many frames as you asked for, 519 // if there are that many. If there weren't then you asked for too many 520 // frames. 521 GetFramesUpTo (idx); 522 if (idx < m_frames.size()) 523 { 524 if (m_show_inlined_frames) 525 { 526 // When inline frames are enabled we actually create all the frames in GetFramesUpTo. 527 frame_sp = m_frames[idx]; 528 } 529 else 530 { 531 Unwind *unwinder = m_thread.GetUnwinder (); 532 if (unwinder) 533 { 534 addr_t pc, cfa; 535 if (unwinder->GetFrameInfoAtIndex(idx, cfa, pc)) 536 { 537 frame_sp.reset (new StackFrame (m_thread.shared_from_this(), idx, idx, cfa, pc, NULL)); 538 539 Function *function = frame_sp->GetSymbolContext (eSymbolContextFunction).function; 540 if (function) 541 { 542 // When we aren't showing inline functions we always use 543 // the top most function block as the scope. 544 frame_sp->SetSymbolContextScope (&function->GetBlock(false)); 545 } 546 else 547 { 548 // Set the symbol scope from the symbol regardless if it is NULL or valid. 549 frame_sp->SetSymbolContextScope (frame_sp->GetSymbolContext (eSymbolContextSymbol).symbol); 550 } 551 SetFrameAtIndex(idx, frame_sp); 552 } 553 } 554 } 555 } 556 else if (original_idx == 0) 557 { 558 // There should ALWAYS be a frame at index 0. If something went wrong with the CurrentInlinedDepth such that 559 // there weren't as many frames as we thought taking that into account, then reset the current inlined depth 560 // and return the real zeroth frame. 561 if (m_frames.size() > 0) 562 { 563 ResetCurrentInlinedDepth(); 564 frame_sp = m_frames[original_idx]; 565 } 566 else 567 { 568 // Why do we have a thread with zero frames, that should not ever happen... 569 if (m_thread.IsValid()) 570 assert ("A valid thread has no frames."); 571 572 } 573 } 574 575 return frame_sp; 576 } 577 578 StackFrameSP 579 StackFrameList::GetFrameWithConcreteFrameIndex (uint32_t unwind_idx) 580 { 581 // First try assuming the unwind index is the same as the frame index. The 582 // unwind index is always greater than or equal to the frame index, so it 583 // is a good place to start. If we have inlined frames we might have 5 584 // concrete frames (frame unwind indexes go from 0-4), but we might have 15 585 // frames after we make all the inlined frames. Most of the time the unwind 586 // frame index (or the concrete frame index) is the same as the frame index. 587 uint32_t frame_idx = unwind_idx; 588 StackFrameSP frame_sp (GetFrameAtIndex (frame_idx)); 589 while (frame_sp) 590 { 591 if (frame_sp->GetFrameIndex() == unwind_idx) 592 break; 593 frame_sp = GetFrameAtIndex (++frame_idx); 594 } 595 return frame_sp; 596 } 597 598 static bool 599 CompareStackID (const StackFrameSP &stack_sp, const StackID &stack_id) 600 { 601 return stack_sp->GetStackID() < stack_id; 602 } 603 604 StackFrameSP 605 StackFrameList::GetFrameWithStackID (const StackID &stack_id) 606 { 607 StackFrameSP frame_sp; 608 609 if (stack_id.IsValid()) 610 { 611 Mutex::Locker locker (m_mutex); 612 uint32_t frame_idx = 0; 613 // Do a binary search in case the stack frame is already in our cache 614 collection::const_iterator begin = m_frames.begin(); 615 collection::const_iterator end = m_frames.end(); 616 if (begin != end) 617 { 618 collection::const_iterator pos = std::lower_bound (begin, end, stack_id, CompareStackID); 619 if (pos != end && (*pos)->GetStackID() == stack_id) 620 return *pos; 621 622 if (m_frames.back()->GetStackID() < stack_id) 623 frame_idx = m_frames.size(); 624 } 625 do 626 { 627 frame_sp = GetFrameAtIndex (frame_idx); 628 if (frame_sp && frame_sp->GetStackID() == stack_id) 629 break; 630 frame_idx++; 631 } 632 while (frame_sp); 633 } 634 return frame_sp; 635 } 636 637 bool 638 StackFrameList::SetFrameAtIndex (uint32_t idx, StackFrameSP &frame_sp) 639 { 640 if (idx >= m_frames.size()) 641 m_frames.resize(idx + 1); 642 // Make sure allocation succeeded by checking bounds again 643 if (idx < m_frames.size()) 644 { 645 m_frames[idx] = frame_sp; 646 return true; 647 } 648 return false; // resize failed, out of memory? 649 } 650 651 uint32_t 652 StackFrameList::GetSelectedFrameIndex () const 653 { 654 Mutex::Locker locker (m_mutex); 655 return m_selected_frame_idx; 656 } 657 658 659 uint32_t 660 StackFrameList::SetSelectedFrame (lldb_private::StackFrame *frame) 661 { 662 Mutex::Locker locker (m_mutex); 663 const_iterator pos; 664 const_iterator begin = m_frames.begin(); 665 const_iterator end = m_frames.end(); 666 m_selected_frame_idx = 0; 667 for (pos = begin; pos != end; ++pos) 668 { 669 if (pos->get() == frame) 670 { 671 m_selected_frame_idx = std::distance (begin, pos); 672 uint32_t inlined_depth = GetCurrentInlinedDepth(); 673 if (inlined_depth != UINT32_MAX) 674 m_selected_frame_idx -= inlined_depth; 675 break; 676 } 677 } 678 SetDefaultFileAndLineToSelectedFrame(); 679 return m_selected_frame_idx; 680 } 681 682 // Mark a stack frame as the current frame using the frame index 683 bool 684 StackFrameList::SetSelectedFrameByIndex (uint32_t idx) 685 { 686 Mutex::Locker locker (m_mutex); 687 StackFrameSP frame_sp (GetFrameAtIndex (idx)); 688 if (frame_sp) 689 { 690 SetSelectedFrame(frame_sp.get()); 691 return true; 692 } 693 else 694 return false; 695 } 696 697 void 698 StackFrameList::SetDefaultFileAndLineToSelectedFrame() 699 { 700 if (m_thread.GetID() == m_thread.GetProcess()->GetThreadList().GetSelectedThread()->GetID()) 701 { 702 StackFrameSP frame_sp (GetFrameAtIndex (GetSelectedFrameIndex())); 703 if (frame_sp) 704 { 705 SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextLineEntry); 706 if (sc.line_entry.file) 707 m_thread.CalculateTarget()->GetSourceManager().SetDefaultFileAndLine (sc.line_entry.file, 708 sc.line_entry.line); 709 } 710 } 711 } 712 713 // The thread has been run, reset the number stack frames to zero so we can 714 // determine how many frames we have lazily. 715 void 716 StackFrameList::Clear () 717 { 718 Mutex::Locker locker (m_mutex); 719 m_frames.clear(); 720 m_concrete_frames_fetched = 0; 721 } 722 723 void 724 StackFrameList::InvalidateFrames (uint32_t start_idx) 725 { 726 Mutex::Locker locker (m_mutex); 727 if (m_show_inlined_frames) 728 { 729 Clear(); 730 } 731 else 732 { 733 const size_t num_frames = m_frames.size(); 734 while (start_idx < num_frames) 735 { 736 m_frames[start_idx].reset(); 737 ++start_idx; 738 } 739 } 740 } 741 742 void 743 StackFrameList::Merge (std::unique_ptr<StackFrameList>& curr_ap, lldb::StackFrameListSP& prev_sp) 744 { 745 Mutex::Locker curr_locker (curr_ap.get() ? &curr_ap->m_mutex : NULL); 746 Mutex::Locker prev_locker (prev_sp.get() ? &prev_sp->m_mutex : NULL); 747 748 #if defined (DEBUG_STACK_FRAMES) 749 StreamFile s(stdout, false); 750 s.PutCString("\n\nStackFrameList::Merge():\nPrev:\n"); 751 if (prev_sp.get()) 752 prev_sp->Dump (&s); 753 else 754 s.PutCString ("NULL"); 755 s.PutCString("\nCurr:\n"); 756 if (curr_ap.get()) 757 curr_ap->Dump (&s); 758 else 759 s.PutCString ("NULL"); 760 s.EOL(); 761 #endif 762 763 if (curr_ap.get() == NULL || curr_ap->GetNumFrames (false) == 0) 764 { 765 #if defined (DEBUG_STACK_FRAMES) 766 s.PutCString("No current frames, leave previous frames alone...\n"); 767 #endif 768 curr_ap.release(); 769 return; 770 } 771 772 if (prev_sp.get() == NULL || prev_sp->GetNumFrames (false) == 0) 773 { 774 #if defined (DEBUG_STACK_FRAMES) 775 s.PutCString("No previous frames, so use current frames...\n"); 776 #endif 777 // We either don't have any previous frames, or since we have more than 778 // one current frames it means we have all the frames and can safely 779 // replace our previous frames. 780 prev_sp.reset (curr_ap.release()); 781 return; 782 } 783 784 const uint32_t num_curr_frames = curr_ap->GetNumFrames (false); 785 786 if (num_curr_frames > 1) 787 { 788 #if defined (DEBUG_STACK_FRAMES) 789 s.PutCString("We have more than one current frame, so use current frames...\n"); 790 #endif 791 // We have more than one current frames it means we have all the frames 792 // and can safely replace our previous frames. 793 prev_sp.reset (curr_ap.release()); 794 795 #if defined (DEBUG_STACK_FRAMES) 796 s.PutCString("\nMerged:\n"); 797 prev_sp->Dump (&s); 798 #endif 799 return; 800 } 801 802 StackFrameSP prev_frame_zero_sp(prev_sp->GetFrameAtIndex (0)); 803 StackFrameSP curr_frame_zero_sp(curr_ap->GetFrameAtIndex (0)); 804 StackID curr_stack_id (curr_frame_zero_sp->GetStackID()); 805 StackID prev_stack_id (prev_frame_zero_sp->GetStackID()); 806 807 #if defined (DEBUG_STACK_FRAMES) 808 const uint32_t num_prev_frames = prev_sp->GetNumFrames (false); 809 s.Printf("\n%u previous frames with one current frame\n", num_prev_frames); 810 #endif 811 812 // We have only a single current frame 813 // Our previous stack frames only had a single frame as well... 814 if (curr_stack_id == prev_stack_id) 815 { 816 #if defined (DEBUG_STACK_FRAMES) 817 s.Printf("\nPrevious frame #0 is same as current frame #0, merge the cached data\n"); 818 #endif 819 820 curr_frame_zero_sp->UpdateCurrentFrameFromPreviousFrame (*prev_frame_zero_sp); 821 // prev_frame_zero_sp->UpdatePreviousFrameFromCurrentFrame (*curr_frame_zero_sp); 822 // prev_sp->SetFrameAtIndex (0, prev_frame_zero_sp); 823 } 824 else if (curr_stack_id < prev_stack_id) 825 { 826 #if defined (DEBUG_STACK_FRAMES) 827 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"); 828 #endif 829 prev_sp->m_frames.insert (prev_sp->m_frames.begin(), curr_frame_zero_sp); 830 } 831 832 curr_ap.release(); 833 834 #if defined (DEBUG_STACK_FRAMES) 835 s.PutCString("\nMerged:\n"); 836 prev_sp->Dump (&s); 837 #endif 838 839 840 } 841 842 lldb::StackFrameSP 843 StackFrameList::GetStackFrameSPForStackFramePtr (StackFrame *stack_frame_ptr) 844 { 845 const_iterator pos; 846 const_iterator begin = m_frames.begin(); 847 const_iterator end = m_frames.end(); 848 lldb::StackFrameSP ret_sp; 849 850 for (pos = begin; pos != end; ++pos) 851 { 852 if (pos->get() == stack_frame_ptr) 853 { 854 ret_sp = (*pos); 855 break; 856 } 857 } 858 return ret_sp; 859 } 860 861 size_t 862 StackFrameList::GetStatus (Stream& strm, 863 uint32_t first_frame, 864 uint32_t num_frames, 865 bool show_frame_info, 866 uint32_t num_frames_with_source) 867 { 868 size_t num_frames_displayed = 0; 869 870 if (num_frames == 0) 871 return 0; 872 873 StackFrameSP frame_sp; 874 uint32_t frame_idx = 0; 875 uint32_t last_frame; 876 877 // Don't let the last frame wrap around... 878 if (num_frames == UINT32_MAX) 879 last_frame = UINT32_MAX; 880 else 881 last_frame = first_frame + num_frames; 882 883 for (frame_idx = first_frame; frame_idx < last_frame; ++frame_idx) 884 { 885 frame_sp = GetFrameAtIndex(frame_idx); 886 if (frame_sp.get() == NULL) 887 break; 888 889 if (!frame_sp->GetStatus (strm, 890 show_frame_info, 891 num_frames_with_source > (first_frame - frame_idx))) 892 break; 893 ++num_frames_displayed; 894 } 895 896 strm.IndentLess(); 897 return num_frames_displayed; 898 } 899 900
