StackFrameList.cpp revision 263367
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 34using namespace lldb; 35using namespace lldb_private; 36 37//---------------------------------------------------------------------- 38// StackFrameList constructor 39//---------------------------------------------------------------------- 40StackFrameList::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//---------------------------------------------------------------------- 66StackFrameList::~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 73void 74StackFrameList::CalculateCurrentInlinedDepth() 75{ 76 uint32_t cur_inlined_depth = GetCurrentInlinedDepth(); 77 if (cur_inlined_depth == UINT32_MAX) 78 { 79 ResetCurrentInlinedDepth(); 80 } 81} 82 83uint32_t 84StackFrameList::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 105void 106StackFrameList::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 225bool 226StackFrameList::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 243void 244StackFrameList::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 253void 254StackFrameList::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 && 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 && 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 const bool cfa_is_valid = true; 340 const bool stop_id_is_valid = false; 341 const bool is_history_frame = false; 342 unwind_frame_sp.reset (new StackFrame (m_thread.shared_from_this(), m_frames.size(), idx, cfa, cfa_is_valid, pc, 0, stop_id_is_valid, is_history_frame, NULL)); 343 m_frames.push_back (unwind_frame_sp); 344 } 345 346 SymbolContext unwind_sc = unwind_frame_sp->GetSymbolContext (eSymbolContextBlock | eSymbolContextFunction); 347 Block *unwind_block = unwind_sc.block; 348 if (unwind_block) 349 { 350 Address curr_frame_address (unwind_frame_sp->GetFrameCodeAddress()); 351 // Be sure to adjust the frame address to match the address 352 // that was used to lookup the symbol context above. If we are 353 // in the first concrete frame, then we lookup using the current 354 // address, else we decrement the address by one to get the correct 355 // location. 356 if (idx > 0) 357 curr_frame_address.Slide(-1); 358 359 SymbolContext next_frame_sc; 360 Address next_frame_address; 361 362 while (unwind_sc.GetParentOfInlinedScope(curr_frame_address, next_frame_sc, next_frame_address)) 363 { 364 StackFrameSP frame_sp(new StackFrame (m_thread.shared_from_this(), 365 m_frames.size(), 366 idx, 367 unwind_frame_sp->GetRegisterContextSP (), 368 cfa, 369 next_frame_address, 370 &next_frame_sc)); 371 372 m_frames.push_back (frame_sp); 373 unwind_sc = next_frame_sc; 374 curr_frame_address = next_frame_address; 375 } 376 } 377 } while (m_frames.size() - 1 < end_idx); 378 379 // Don't try to merge till you've calculated all the frames in this stack. 380 if (GetAllFramesFetched() && m_prev_frames_sp) 381 { 382 StackFrameList *prev_frames = m_prev_frames_sp.get(); 383 StackFrameList *curr_frames = this; 384 385 //curr_frames->m_current_inlined_depth = prev_frames->m_current_inlined_depth; 386 //curr_frames->m_current_inlined_pc = prev_frames->m_current_inlined_pc; 387 //printf ("GetFramesUpTo: Copying current inlined depth: %d 0x%" PRIx64 ".\n", curr_frames->m_current_inlined_depth, curr_frames->m_current_inlined_pc); 388 389#if defined (DEBUG_STACK_FRAMES) 390 s.PutCString("\nprev_frames:\n"); 391 prev_frames->Dump (&s); 392 s.PutCString("\ncurr_frames:\n"); 393 curr_frames->Dump (&s); 394 s.EOL(); 395#endif 396 size_t curr_frame_num, prev_frame_num; 397 398 for (curr_frame_num = curr_frames->m_frames.size(), prev_frame_num = prev_frames->m_frames.size(); 399 curr_frame_num > 0 && prev_frame_num > 0; 400 --curr_frame_num, --prev_frame_num) 401 { 402 const size_t curr_frame_idx = curr_frame_num-1; 403 const size_t prev_frame_idx = prev_frame_num-1; 404 StackFrameSP curr_frame_sp (curr_frames->m_frames[curr_frame_idx]); 405 StackFrameSP prev_frame_sp (prev_frames->m_frames[prev_frame_idx]); 406 407#if defined (DEBUG_STACK_FRAMES) 408 s.Printf("\n\nCurr frame #%u ", curr_frame_idx); 409 if (curr_frame_sp) 410 curr_frame_sp->Dump (&s, true, false); 411 else 412 s.PutCString("NULL"); 413 s.Printf("\nPrev frame #%u ", prev_frame_idx); 414 if (prev_frame_sp) 415 prev_frame_sp->Dump (&s, true, false); 416 else 417 s.PutCString("NULL"); 418#endif 419 420 StackFrame *curr_frame = curr_frame_sp.get(); 421 StackFrame *prev_frame = prev_frame_sp.get(); 422 423 if (curr_frame == NULL || prev_frame == NULL) 424 break; 425 426 // Check the stack ID to make sure they are equal 427 if (curr_frame->GetStackID() != prev_frame->GetStackID()) 428 break; 429 430 prev_frame->UpdatePreviousFrameFromCurrentFrame (*curr_frame); 431 // Now copy the fixed up previous frame into the current frames 432 // so the pointer doesn't change 433 m_frames[curr_frame_idx] = prev_frame_sp; 434 //curr_frame->UpdateCurrentFrameFromPreviousFrame (*prev_frame); 435 436#if defined (DEBUG_STACK_FRAMES) 437 s.Printf("\n Copying previous frame to current frame"); 438#endif 439 } 440 // We are done with the old stack frame list, we can release it now 441 m_prev_frames_sp.reset(); 442 } 443 444#if defined (DEBUG_STACK_FRAMES) 445 s.PutCString("\n\nNew frames:\n"); 446 Dump (&s); 447 s.EOL(); 448#endif 449 } 450 else 451 { 452 if (end_idx < m_concrete_frames_fetched) 453 return; 454 455 if (unwinder) 456 { 457 uint32_t num_frames = unwinder->GetFramesUpTo(end_idx); 458 if (num_frames <= end_idx + 1) 459 { 460 //Done unwinding. 461 m_concrete_frames_fetched = UINT32_MAX; 462 } 463 m_frames.resize(num_frames); 464 } 465 } 466} 467 468uint32_t 469StackFrameList::GetNumFrames (bool can_create) 470{ 471 Mutex::Locker locker (m_mutex); 472 473 if (can_create) 474 GetFramesUpTo (UINT32_MAX); 475 476 uint32_t inlined_depth = GetCurrentInlinedDepth(); 477 if (inlined_depth == UINT32_MAX) 478 return m_frames.size(); 479 else 480 return m_frames.size() - inlined_depth; 481} 482 483void 484StackFrameList::Dump (Stream *s) 485{ 486 if (s == NULL) 487 return; 488 Mutex::Locker locker (m_mutex); 489 490 const_iterator pos, begin = m_frames.begin(), end = m_frames.end(); 491 for (pos = begin; pos != end; ++pos) 492 { 493 StackFrame *frame = (*pos).get(); 494 s->Printf("%p: ", frame); 495 if (frame) 496 { 497 frame->GetStackID().Dump (s); 498 frame->DumpUsingSettingsFormat (s); 499 } 500 else 501 s->Printf("frame #%u", (uint32_t)std::distance (begin, pos)); 502 s->EOL(); 503 } 504 s->EOL(); 505} 506 507StackFrameSP 508StackFrameList::GetFrameAtIndex (uint32_t idx) 509{ 510 StackFrameSP frame_sp; 511 Mutex::Locker locker (m_mutex); 512 uint32_t original_idx = idx; 513 514 uint32_t inlined_depth = GetCurrentInlinedDepth(); 515 if (inlined_depth != UINT32_MAX) 516 idx += inlined_depth; 517 518 if (idx < m_frames.size()) 519 frame_sp = m_frames[idx]; 520 521 if (frame_sp) 522 return frame_sp; 523 524 // GetFramesUpTo will fill m_frames with as many frames as you asked for, 525 // if there are that many. If there weren't then you asked for too many 526 // frames. 527 GetFramesUpTo (idx); 528 if (idx < m_frames.size()) 529 { 530 if (m_show_inlined_frames) 531 { 532 // When inline frames are enabled we actually create all the frames in GetFramesUpTo. 533 frame_sp = m_frames[idx]; 534 } 535 else 536 { 537 Unwind *unwinder = m_thread.GetUnwinder (); 538 if (unwinder) 539 { 540 addr_t pc, cfa; 541 if (unwinder->GetFrameInfoAtIndex(idx, cfa, pc)) 542 { 543 const bool cfa_is_valid = true; 544 const bool stop_id_is_valid = false; 545 const bool is_history_frame = false; 546 frame_sp.reset (new StackFrame (m_thread.shared_from_this(), idx, idx, cfa, cfa_is_valid, pc, 0, stop_id_is_valid, is_history_frame, NULL)); 547 548 Function *function = frame_sp->GetSymbolContext (eSymbolContextFunction).function; 549 if (function) 550 { 551 // When we aren't showing inline functions we always use 552 // the top most function block as the scope. 553 frame_sp->SetSymbolContextScope (&function->GetBlock(false)); 554 } 555 else 556 { 557 // Set the symbol scope from the symbol regardless if it is NULL or valid. 558 frame_sp->SetSymbolContextScope (frame_sp->GetSymbolContext (eSymbolContextSymbol).symbol); 559 } 560 SetFrameAtIndex(idx, frame_sp); 561 } 562 } 563 } 564 } 565 else if (original_idx == 0) 566 { 567 // There should ALWAYS be a frame at index 0. If something went wrong with the CurrentInlinedDepth such that 568 // there weren't as many frames as we thought taking that into account, then reset the current inlined depth 569 // and return the real zeroth frame. 570 if (m_frames.size() > 0) 571 { 572 ResetCurrentInlinedDepth(); 573 frame_sp = m_frames[original_idx]; 574 } 575 else 576 { 577 // Why do we have a thread with zero frames, that should not ever happen... 578 if (m_thread.IsValid()) 579 assert ("A valid thread has no frames."); 580 581 } 582 } 583 584 return frame_sp; 585} 586 587StackFrameSP 588StackFrameList::GetFrameWithConcreteFrameIndex (uint32_t unwind_idx) 589{ 590 // First try assuming the unwind index is the same as the frame index. The 591 // unwind index is always greater than or equal to the frame index, so it 592 // is a good place to start. If we have inlined frames we might have 5 593 // concrete frames (frame unwind indexes go from 0-4), but we might have 15 594 // frames after we make all the inlined frames. Most of the time the unwind 595 // frame index (or the concrete frame index) is the same as the frame index. 596 uint32_t frame_idx = unwind_idx; 597 StackFrameSP frame_sp (GetFrameAtIndex (frame_idx)); 598 while (frame_sp) 599 { 600 if (frame_sp->GetFrameIndex() == unwind_idx) 601 break; 602 frame_sp = GetFrameAtIndex (++frame_idx); 603 } 604 return frame_sp; 605} 606 607static bool 608CompareStackID (const StackFrameSP &stack_sp, const StackID &stack_id) 609{ 610 return stack_sp->GetStackID() < stack_id; 611} 612 613StackFrameSP 614StackFrameList::GetFrameWithStackID (const StackID &stack_id) 615{ 616 StackFrameSP frame_sp; 617 618 if (stack_id.IsValid()) 619 { 620 Mutex::Locker locker (m_mutex); 621 uint32_t frame_idx = 0; 622 // Do a binary search in case the stack frame is already in our cache 623 collection::const_iterator begin = m_frames.begin(); 624 collection::const_iterator end = m_frames.end(); 625 if (begin != end) 626 { 627 collection::const_iterator pos = std::lower_bound (begin, end, stack_id, CompareStackID); 628 if (pos != end && (*pos)->GetStackID() == stack_id) 629 return *pos; 630 631 if (m_frames.back()->GetStackID() < stack_id) 632 frame_idx = m_frames.size(); 633 } 634 do 635 { 636 frame_sp = GetFrameAtIndex (frame_idx); 637 if (frame_sp && frame_sp->GetStackID() == stack_id) 638 break; 639 frame_idx++; 640 } 641 while (frame_sp); 642 } 643 return frame_sp; 644} 645 646bool 647StackFrameList::SetFrameAtIndex (uint32_t idx, StackFrameSP &frame_sp) 648{ 649 if (idx >= m_frames.size()) 650 m_frames.resize(idx + 1); 651 // Make sure allocation succeeded by checking bounds again 652 if (idx < m_frames.size()) 653 { 654 m_frames[idx] = frame_sp; 655 return true; 656 } 657 return false; // resize failed, out of memory? 658} 659 660uint32_t 661StackFrameList::GetSelectedFrameIndex () const 662{ 663 Mutex::Locker locker (m_mutex); 664 return m_selected_frame_idx; 665} 666 667 668uint32_t 669StackFrameList::SetSelectedFrame (lldb_private::StackFrame *frame) 670{ 671 Mutex::Locker locker (m_mutex); 672 const_iterator pos; 673 const_iterator begin = m_frames.begin(); 674 const_iterator end = m_frames.end(); 675 m_selected_frame_idx = 0; 676 for (pos = begin; pos != end; ++pos) 677 { 678 if (pos->get() == frame) 679 { 680 m_selected_frame_idx = std::distance (begin, pos); 681 uint32_t inlined_depth = GetCurrentInlinedDepth(); 682 if (inlined_depth != UINT32_MAX) 683 m_selected_frame_idx -= inlined_depth; 684 break; 685 } 686 } 687 SetDefaultFileAndLineToSelectedFrame(); 688 return m_selected_frame_idx; 689} 690 691// Mark a stack frame as the current frame using the frame index 692bool 693StackFrameList::SetSelectedFrameByIndex (uint32_t idx) 694{ 695 Mutex::Locker locker (m_mutex); 696 StackFrameSP frame_sp (GetFrameAtIndex (idx)); 697 if (frame_sp) 698 { 699 SetSelectedFrame(frame_sp.get()); 700 return true; 701 } 702 else 703 return false; 704} 705 706void 707StackFrameList::SetDefaultFileAndLineToSelectedFrame() 708{ 709 if (m_thread.GetID() == m_thread.GetProcess()->GetThreadList().GetSelectedThread()->GetID()) 710 { 711 StackFrameSP frame_sp (GetFrameAtIndex (GetSelectedFrameIndex())); 712 if (frame_sp) 713 { 714 SymbolContext sc = frame_sp->GetSymbolContext(eSymbolContextLineEntry); 715 if (sc.line_entry.file) 716 m_thread.CalculateTarget()->GetSourceManager().SetDefaultFileAndLine (sc.line_entry.file, 717 sc.line_entry.line); 718 } 719 } 720} 721 722// The thread has been run, reset the number stack frames to zero so we can 723// determine how many frames we have lazily. 724void 725StackFrameList::Clear () 726{ 727 Mutex::Locker locker (m_mutex); 728 m_frames.clear(); 729 m_concrete_frames_fetched = 0; 730} 731 732void 733StackFrameList::InvalidateFrames (uint32_t start_idx) 734{ 735 Mutex::Locker locker (m_mutex); 736 if (m_show_inlined_frames) 737 { 738 Clear(); 739 } 740 else 741 { 742 const size_t num_frames = m_frames.size(); 743 while (start_idx < num_frames) 744 { 745 m_frames[start_idx].reset(); 746 ++start_idx; 747 } 748 } 749} 750 751void 752StackFrameList::Merge (std::unique_ptr<StackFrameList>& curr_ap, lldb::StackFrameListSP& prev_sp) 753{ 754 Mutex::Locker curr_locker (curr_ap.get() ? &curr_ap->m_mutex : NULL); 755 Mutex::Locker prev_locker (prev_sp.get() ? &prev_sp->m_mutex : NULL); 756 757#if defined (DEBUG_STACK_FRAMES) 758 StreamFile s(stdout, false); 759 s.PutCString("\n\nStackFrameList::Merge():\nPrev:\n"); 760 if (prev_sp.get()) 761 prev_sp->Dump (&s); 762 else 763 s.PutCString ("NULL"); 764 s.PutCString("\nCurr:\n"); 765 if (curr_ap.get()) 766 curr_ap->Dump (&s); 767 else 768 s.PutCString ("NULL"); 769 s.EOL(); 770#endif 771 772 if (curr_ap.get() == NULL || curr_ap->GetNumFrames (false) == 0) 773 { 774#if defined (DEBUG_STACK_FRAMES) 775 s.PutCString("No current frames, leave previous frames alone...\n"); 776#endif 777 curr_ap.release(); 778 return; 779 } 780 781 if (prev_sp.get() == NULL || prev_sp->GetNumFrames (false) == 0) 782 { 783#if defined (DEBUG_STACK_FRAMES) 784 s.PutCString("No previous frames, so use current frames...\n"); 785#endif 786 // We either don't have any previous frames, or since we have more than 787 // one current frames it means we have all the frames and can safely 788 // replace our previous frames. 789 prev_sp.reset (curr_ap.release()); 790 return; 791 } 792 793 const uint32_t num_curr_frames = curr_ap->GetNumFrames (false); 794 795 if (num_curr_frames > 1) 796 { 797#if defined (DEBUG_STACK_FRAMES) 798 s.PutCString("We have more than one current frame, so use current frames...\n"); 799#endif 800 // We have more than one current frames it means we have all the frames 801 // and can safely replace our previous frames. 802 prev_sp.reset (curr_ap.release()); 803 804#if defined (DEBUG_STACK_FRAMES) 805 s.PutCString("\nMerged:\n"); 806 prev_sp->Dump (&s); 807#endif 808 return; 809 } 810 811 StackFrameSP prev_frame_zero_sp(prev_sp->GetFrameAtIndex (0)); 812 StackFrameSP curr_frame_zero_sp(curr_ap->GetFrameAtIndex (0)); 813 StackID curr_stack_id (curr_frame_zero_sp->GetStackID()); 814 StackID prev_stack_id (prev_frame_zero_sp->GetStackID()); 815 816#if defined (DEBUG_STACK_FRAMES) 817 const uint32_t num_prev_frames = prev_sp->GetNumFrames (false); 818 s.Printf("\n%u previous frames with one current frame\n", num_prev_frames); 819#endif 820 821 // We have only a single current frame 822 // Our previous stack frames only had a single frame as well... 823 if (curr_stack_id == prev_stack_id) 824 { 825#if defined (DEBUG_STACK_FRAMES) 826 s.Printf("\nPrevious frame #0 is same as current frame #0, merge the cached data\n"); 827#endif 828 829 curr_frame_zero_sp->UpdateCurrentFrameFromPreviousFrame (*prev_frame_zero_sp); 830// prev_frame_zero_sp->UpdatePreviousFrameFromCurrentFrame (*curr_frame_zero_sp); 831// prev_sp->SetFrameAtIndex (0, prev_frame_zero_sp); 832 } 833 else if (curr_stack_id < prev_stack_id) 834 { 835#if defined (DEBUG_STACK_FRAMES) 836 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"); 837#endif 838 prev_sp->m_frames.insert (prev_sp->m_frames.begin(), curr_frame_zero_sp); 839 } 840 841 curr_ap.release(); 842 843#if defined (DEBUG_STACK_FRAMES) 844 s.PutCString("\nMerged:\n"); 845 prev_sp->Dump (&s); 846#endif 847 848 849} 850 851lldb::StackFrameSP 852StackFrameList::GetStackFrameSPForStackFramePtr (StackFrame *stack_frame_ptr) 853{ 854 const_iterator pos; 855 const_iterator begin = m_frames.begin(); 856 const_iterator end = m_frames.end(); 857 lldb::StackFrameSP ret_sp; 858 859 for (pos = begin; pos != end; ++pos) 860 { 861 if (pos->get() == stack_frame_ptr) 862 { 863 ret_sp = (*pos); 864 break; 865 } 866 } 867 return ret_sp; 868} 869 870size_t 871StackFrameList::GetStatus (Stream& strm, 872 uint32_t first_frame, 873 uint32_t num_frames, 874 bool show_frame_info, 875 uint32_t num_frames_with_source, 876 const char *selected_frame_marker) 877{ 878 size_t num_frames_displayed = 0; 879 880 if (num_frames == 0) 881 return 0; 882 883 StackFrameSP frame_sp; 884 uint32_t frame_idx = 0; 885 uint32_t last_frame; 886 887 // Don't let the last frame wrap around... 888 if (num_frames == UINT32_MAX) 889 last_frame = UINT32_MAX; 890 else 891 last_frame = first_frame + num_frames; 892 893 StackFrameSP selected_frame_sp = m_thread.GetSelectedFrame(); 894 const char *unselected_marker = NULL; 895 std::string buffer; 896 if (selected_frame_marker) 897 { 898 size_t len = strlen(selected_frame_marker); 899 buffer.insert(buffer.begin(), len, ' '); 900 unselected_marker = buffer.c_str(); 901 } 902 const char *marker = NULL; 903 904 for (frame_idx = first_frame; frame_idx < last_frame; ++frame_idx) 905 { 906 frame_sp = GetFrameAtIndex(frame_idx); 907 if (frame_sp.get() == NULL) 908 break; 909 910 if (selected_frame_marker != NULL) 911 { 912 if (frame_sp == selected_frame_sp) 913 marker = selected_frame_marker; 914 else 915 marker = unselected_marker; 916 } 917 918 if (!frame_sp->GetStatus (strm, 919 show_frame_info, 920 num_frames_with_source > (first_frame - frame_idx), marker)) 921 break; 922 ++num_frames_displayed; 923 } 924 925 strm.IndentLess(); 926 return num_frames_displayed; 927} 928 929