1 //===-- StackFrame.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/StackFrame.h" 11 12 // C Includes 13 // C++ Includes 14 // Other libraries and framework includes 15 // Project includes 16 #include "lldb/Core/Module.h" 17 #include "lldb/Core/Debugger.h" 18 #include "lldb/Core/Disassembler.h" 19 #include "lldb/Core/Value.h" 20 #include "lldb/Core/ValueObjectVariable.h" 21 #include "lldb/Core/ValueObjectConstResult.h" 22 #include "lldb/Symbol/Function.h" 23 #include "lldb/Symbol/VariableList.h" 24 #include "lldb/Target/ExecutionContext.h" 25 #include "lldb/Target/Process.h" 26 #include "lldb/Target/RegisterContext.h" 27 #include "lldb/Target/Target.h" 28 #include "lldb/Target/Thread.h" 29 30 using namespace lldb; 31 using namespace lldb_private; 32 33 // The first bits in the flags are reserved for the SymbolContext::Scope bits 34 // so we know if we have tried to look up information in our internal symbol 35 // context (m_sc) already. 36 #define RESOLVED_FRAME_CODE_ADDR (uint32_t(eSymbolContextEverything + 1)) 37 #define RESOLVED_FRAME_ID_SYMBOL_SCOPE (RESOLVED_FRAME_CODE_ADDR << 1) 38 #define GOT_FRAME_BASE (RESOLVED_FRAME_ID_SYMBOL_SCOPE << 1) 39 #define RESOLVED_VARIABLES (GOT_FRAME_BASE << 1) 40 #define RESOLVED_GLOBAL_VARIABLES (RESOLVED_VARIABLES << 1) 41 42 StackFrame::StackFrame 43 ( 44 lldb::user_id_t frame_idx, 45 lldb::user_id_t unwind_frame_index, 46 Thread &thread, 47 lldb::addr_t cfa, 48 lldb::addr_t pc, 49 const SymbolContext *sc_ptr 50 ) : 51 m_thread (thread), 52 m_frame_index (frame_idx), 53 m_concrete_frame_index (unwind_frame_index), 54 m_reg_context_sp (), 55 m_id (pc, cfa, NULL), 56 m_frame_code_addr (NULL, pc), 57 m_sc (), 58 m_flags (), 59 m_frame_base (), 60 m_frame_base_error (), 61 m_variable_list_sp (), 62 m_variable_list_value_objects (), 63 m_disassembly () 64 { 65 if (sc_ptr != NULL) 66 { 67 m_sc = *sc_ptr; 68 m_flags.Set(m_sc.GetResolvedMask ()); 69 } 70 } 71 72 StackFrame::StackFrame 73 ( 74 lldb::user_id_t frame_idx, 75 lldb::user_id_t unwind_frame_index, 76 Thread &thread, 77 const RegisterContextSP ®_context_sp, 78 lldb::addr_t cfa, 79 lldb::addr_t pc, 80 const SymbolContext *sc_ptr 81 ) : 82 m_thread (thread), 83 m_frame_index (frame_idx), 84 m_concrete_frame_index (unwind_frame_index), 85 m_reg_context_sp (reg_context_sp), 86 m_id (pc, cfa, NULL), 87 m_frame_code_addr (NULL, pc), 88 m_sc (), 89 m_flags (), 90 m_frame_base (), 91 m_frame_base_error (), 92 m_variable_list_sp (), 93 m_variable_list_value_objects (), 94 m_disassembly () 95 { 96 if (sc_ptr != NULL) 97 { 98 m_sc = *sc_ptr; 99 m_flags.Set(m_sc.GetResolvedMask ()); 100 } 101 102 if (reg_context_sp && !m_sc.target_sp) 103 { 104 m_sc.target_sp = reg_context_sp->GetThread().GetProcess().GetTarget().GetSP(); 105 m_flags.Set (eSymbolContextTarget); 106 } 107 } 108 109 StackFrame::StackFrame 110 ( 111 lldb::user_id_t frame_idx, 112 lldb::user_id_t unwind_frame_index, 113 Thread &thread, 114 const RegisterContextSP ®_context_sp, 115 lldb::addr_t cfa, 116 const Address& pc_addr, 117 const SymbolContext *sc_ptr 118 ) : 119 m_thread (thread), 120 m_frame_index (frame_idx), 121 m_concrete_frame_index (unwind_frame_index), 122 m_reg_context_sp (reg_context_sp), 123 m_id (pc_addr.GetLoadAddress (&thread.GetProcess().GetTarget()), cfa, NULL), 124 m_frame_code_addr (pc_addr), 125 m_sc (), 126 m_flags (), 127 m_frame_base (), 128 m_frame_base_error (), 129 m_variable_list_sp (), 130 m_variable_list_value_objects (), 131 m_disassembly () 132 { 133 if (sc_ptr != NULL) 134 { 135 m_sc = *sc_ptr; 136 m_flags.Set(m_sc.GetResolvedMask ()); 137 } 138 139 if (m_sc.target_sp.get() == NULL && reg_context_sp) 140 { 141 m_sc.target_sp = reg_context_sp->GetThread().GetProcess().GetTarget().GetSP(); 142 m_flags.Set (eSymbolContextTarget); 143 } 144 145 Module *pc_module = pc_addr.GetModule(); 146 if (m_sc.module_sp.get() == NULL || m_sc.module_sp.get() != pc_module) 147 { 148 if (pc_module) 149 { 150 m_sc.module_sp = pc_module->GetSP(); 151 m_flags.Set (eSymbolContextModule); 152 } 153 else 154 { 155 m_sc.module_sp.reset(); 156 } 157 158 } 159 } 160 161 162 //---------------------------------------------------------------------- 163 // Destructor 164 //---------------------------------------------------------------------- 165 StackFrame::~StackFrame() 166 { 167 } 168 169 StackID& 170 StackFrame::GetStackID() 171 { 172 // Make sure we have resolved the StackID object's symbol context scope if 173 // we already haven't looked it up. 174 175 if (m_flags.IsClear (RESOLVED_FRAME_ID_SYMBOL_SCOPE)) 176 { 177 if (m_id.GetSymbolContextScope ()) 178 { 179 // We already have a symbol context scope, we just don't have our 180 // flag bit set. 181 m_flags.Set (RESOLVED_FRAME_ID_SYMBOL_SCOPE); 182 } 183 else 184 { 185 // Calculate the frame block and use this for the stack ID symbol 186 // context scope if we have one. 187 SymbolContextScope *scope = GetFrameBlock (); 188 if (scope == NULL) 189 { 190 // We don't have a block, so use the symbol 191 if (m_flags.IsClear (eSymbolContextSymbol)) 192 GetSymbolContext (eSymbolContextSymbol); 193 194 // It is ok if m_sc.symbol is NULL here 195 scope = m_sc.symbol; 196 } 197 // Set the symbol context scope (the accessor will set the 198 // RESOLVED_FRAME_ID_SYMBOL_SCOPE bit in m_flags). 199 SetSymbolContextScope (scope); 200 } 201 } 202 return m_id; 203 } 204 205 void 206 StackFrame::SetSymbolContextScope (SymbolContextScope *symbol_scope) 207 { 208 m_flags.Set (RESOLVED_FRAME_ID_SYMBOL_SCOPE); 209 m_id.SetSymbolContextScope (symbol_scope); 210 } 211 212 Address& 213 StackFrame::GetFrameCodeAddress() 214 { 215 if (m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR) && !m_frame_code_addr.IsSectionOffset()) 216 { 217 m_flags.Set (RESOLVED_FRAME_CODE_ADDR); 218 219 // Resolve the PC into a temporary address because if ResolveLoadAddress 220 // fails to resolve the address, it will clear the address object... 221 Address resolved_pc; 222 if (m_thread.GetProcess().GetTarget().GetSectionLoadList().ResolveLoadAddress(m_frame_code_addr.GetOffset(), resolved_pc)) 223 { 224 m_frame_code_addr = resolved_pc; 225 const Section *section = m_frame_code_addr.GetSection(); 226 if (section) 227 { 228 Module *module = section->GetModule(); 229 if (module) 230 { 231 m_sc.module_sp = module->GetSP(); 232 if (m_sc.module_sp) 233 m_flags.Set(eSymbolContextModule); 234 } 235 } 236 } 237 } 238 return m_frame_code_addr; 239 } 240 241 void 242 StackFrame::ChangePC (addr_t pc) 243 { 244 m_frame_code_addr.SetOffset(pc); 245 m_frame_code_addr.SetSection(NULL); 246 m_sc.Clear(); 247 m_flags.Reset(0); 248 m_thread.ClearStackFrames (); 249 } 250 251 const char * 252 StackFrame::Disassemble () 253 { 254 if (m_disassembly.GetSize() == 0) 255 { 256 ExecutionContext exe_ctx; 257 CalculateExecutionContext(exe_ctx); 258 Target &target = m_thread.GetProcess().GetTarget(); 259 Disassembler::Disassemble (target.GetDebugger(), 260 target.GetArchitecture(), 261 exe_ctx, 262 0, 263 false, 264 m_disassembly); 265 if (m_disassembly.GetSize() == 0) 266 return NULL; 267 } 268 return m_disassembly.GetData(); 269 } 270 271 Block * 272 StackFrame::GetFrameBlock () 273 { 274 if (m_sc.block == NULL && m_flags.IsClear (eSymbolContextBlock)) 275 GetSymbolContext (eSymbolContextBlock); 276 277 if (m_sc.block) 278 { 279 Block *inline_block = m_sc.block->GetContainingInlinedBlock(); 280 if (inline_block) 281 { 282 // Use the block with the inlined function info 283 // as the frame block we want this frame to have only the variables 284 // for the inlined function and its non-inlined block child blocks. 285 return inline_block; 286 } 287 else 288 { 289 // This block is not contained withing any inlined function blocks 290 // with so we want to use the top most function block. 291 return &m_sc.function->GetBlock (false); 292 } 293 } 294 return NULL; 295 } 296 297 //---------------------------------------------------------------------- 298 // Get the symbol context if we already haven't done so by resolving the 299 // PC address as much as possible. This way when we pass around a 300 // StackFrame object, everyone will have as much information as 301 // possible and no one will ever have to look things up manually. 302 //---------------------------------------------------------------------- 303 const SymbolContext& 304 StackFrame::GetSymbolContext (uint32_t resolve_scope) 305 { 306 // Copy our internal symbol context into "sc". 307 if ((m_flags.Get() & resolve_scope) != resolve_scope) 308 { 309 // Resolve our PC to section offset if we haven't alreday done so 310 // and if we don't have a module. The resolved address section will 311 // contain the module to which it belongs 312 if (!m_sc.module_sp && m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR)) 313 GetFrameCodeAddress(); 314 315 // If this is not frame zero, then we need to subtract 1 from the PC 316 // value when doing address lookups since the PC will be on the 317 // instruction following the function call instruction... 318 319 Address lookup_addr(GetFrameCodeAddress()); 320 if (m_frame_index > 0 && lookup_addr.IsValid()) 321 { 322 addr_t offset = lookup_addr.GetOffset(); 323 if (offset > 0) 324 lookup_addr.SetOffset(offset - 1); 325 } 326 327 328 uint32_t resolved = 0; 329 if (m_sc.module_sp) 330 { 331 // We have something in our stack frame symbol context, lets check 332 // if we haven't already tried to lookup one of those things. If we 333 // haven't then we will do the query. 334 335 uint32_t actual_resolve_scope = 0; 336 337 if (resolve_scope & eSymbolContextCompUnit) 338 { 339 if (m_flags.IsClear (eSymbolContextCompUnit)) 340 { 341 if (m_sc.comp_unit) 342 resolved |= eSymbolContextCompUnit; 343 else 344 actual_resolve_scope |= eSymbolContextCompUnit; 345 } 346 } 347 348 if (resolve_scope & eSymbolContextFunction) 349 { 350 if (m_flags.IsClear (eSymbolContextFunction)) 351 { 352 if (m_sc.function) 353 resolved |= eSymbolContextFunction; 354 else 355 actual_resolve_scope |= eSymbolContextFunction; 356 } 357 } 358 359 if (resolve_scope & eSymbolContextBlock) 360 { 361 if (m_flags.IsClear (eSymbolContextBlock)) 362 { 363 if (m_sc.block) 364 resolved |= eSymbolContextBlock; 365 else 366 actual_resolve_scope |= eSymbolContextBlock; 367 } 368 } 369 370 if (resolve_scope & eSymbolContextSymbol) 371 { 372 if (m_flags.IsClear (eSymbolContextSymbol)) 373 { 374 if (m_sc.symbol) 375 resolved |= eSymbolContextSymbol; 376 else 377 actual_resolve_scope |= eSymbolContextSymbol; 378 } 379 } 380 381 if (resolve_scope & eSymbolContextLineEntry) 382 { 383 if (m_flags.IsClear (eSymbolContextLineEntry)) 384 { 385 if (m_sc.line_entry.IsValid()) 386 resolved |= eSymbolContextLineEntry; 387 else 388 actual_resolve_scope |= eSymbolContextLineEntry; 389 } 390 } 391 392 if (actual_resolve_scope) 393 { 394 // We might be resolving less information than what is already 395 // in our current symbol context so resolve into a temporary 396 // symbol context "sc" so we don't clear out data we have 397 // already found in "m_sc" 398 SymbolContext sc; 399 // Set flags that indicate what we have tried to resolve 400 resolved |= m_sc.module_sp->ResolveSymbolContextForAddress (lookup_addr, actual_resolve_scope, sc); 401 // Only replace what we didn't already have as we may have 402 // information for an inlined function scope that won't match 403 // what a standard lookup by address would match 404 if ((resolved & eSymbolContextCompUnit) && m_sc.comp_unit == NULL) 405 m_sc.comp_unit = sc.comp_unit; 406 if ((resolved & eSymbolContextFunction) && m_sc.function == NULL) 407 m_sc.function = sc.function; 408 if ((resolved & eSymbolContextBlock) && m_sc.block == NULL) 409 m_sc.block = sc.block; 410 if ((resolved & eSymbolContextSymbol) && m_sc.symbol == NULL) 411 m_sc.symbol = sc.symbol; 412 if ((resolved & eSymbolContextLineEntry) && !m_sc.line_entry.IsValid()) 413 m_sc.line_entry = sc.line_entry; 414 415 } 416 } 417 else 418 { 419 // If we don't have a module, then we can't have the compile unit, 420 // function, block, line entry or symbol, so we can safely call 421 // ResolveSymbolContextForAddress with our symbol context member m_sc. 422 resolved |= m_thread.GetProcess().GetTarget().GetImages().ResolveSymbolContextForAddress (lookup_addr, resolve_scope, m_sc); 423 } 424 425 // If the target was requested add that: 426 if (m_sc.target_sp.get() == NULL) 427 { 428 m_sc.target_sp = CalculateProcess()->GetTarget().GetSP(); 429 if (m_sc.target_sp) 430 resolved |= eSymbolContextTarget; 431 } 432 433 // Update our internal flags so we remember what we have tried to locate so 434 // we don't have to keep trying when more calls to this function are made. 435 // We might have dug up more information that was requested (for example 436 // if we were asked to only get the block, we will have gotten the 437 // compile unit, and function) so set any additional bits that we resolved 438 m_flags.Set (resolve_scope | resolved); 439 } 440 441 // Return the symbol context with everything that was possible to resolve 442 // resolved. 443 return m_sc; 444 } 445 446 447 VariableList * 448 StackFrame::GetVariableList (bool get_file_globals) 449 { 450 if (m_flags.IsClear(RESOLVED_VARIABLES)) 451 { 452 m_flags.Set(RESOLVED_VARIABLES); 453 454 Block *frame_block = GetFrameBlock(); 455 456 if (frame_block) 457 { 458 const bool get_child_variables = true; 459 const bool can_create = true; 460 m_variable_list_sp = frame_block->GetVariableList (get_child_variables, can_create); 461 } 462 } 463 464 if (m_flags.IsClear(RESOLVED_GLOBAL_VARIABLES) && 465 get_file_globals) 466 { 467 m_flags.Set(RESOLVED_GLOBAL_VARIABLES); 468 469 if (m_flags.IsClear (eSymbolContextCompUnit)) 470 GetSymbolContext (eSymbolContextCompUnit); 471 472 if (m_sc.comp_unit) 473 { 474 VariableListSP global_variable_list_sp (m_sc.comp_unit->GetVariableList(true)); 475 if (m_variable_list_sp) 476 m_variable_list_sp->AddVariables (global_variable_list_sp.get()); 477 else 478 m_variable_list_sp = global_variable_list_sp; 479 } 480 } 481 482 return m_variable_list_sp.get(); 483 } 484 485 ValueObjectSP 486 StackFrame::GetValueForVariableExpressionPath (const char *var_expr_cstr, uint32_t options, Error &error) 487 { 488 489 if (var_expr_cstr && var_expr_cstr[0]) 490 { 491 const bool check_ptr_vs_member = (options & eExpressionPathOptionCheckPtrVsMember) != 0; 492 const bool no_fragile_ivar = (options & eExpressionPathOptionsNoFragileObjcIvar) != 0; 493 error.Clear(); 494 bool deref = false; 495 bool address_of = false; 496 ValueObjectSP valobj_sp; 497 const bool get_file_globals = true; 498 VariableList *variable_list = GetVariableList (get_file_globals); 499 500 if (variable_list) 501 { 502 // If first character is a '*', then show pointer contents 503 const char *var_expr = var_expr_cstr; 504 if (var_expr[0] == '*') 505 { 506 deref = true; 507 var_expr++; // Skip the '*' 508 } 509 else if (var_expr[0] == '&') 510 { 511 address_of = true; 512 var_expr++; // Skip the '&' 513 } 514 515 std::string var_path (var_expr); 516 size_t separator_idx = var_path.find_first_of(".-[=+~|&^%#@!/?,<>{}"); 517 StreamString var_expr_path_strm; 518 519 ConstString name_const_string; 520 if (separator_idx == std::string::npos) 521 name_const_string.SetCString (var_path.c_str()); 522 else 523 name_const_string.SetCStringWithLength (var_path.c_str(), separator_idx); 524 525 VariableSP var_sp (variable_list->FindVariable(name_const_string)); 526 if (var_sp) 527 { 528 valobj_sp = GetValueObjectForFrameVariable (var_sp); 529 530 var_path.erase (0, name_const_string.GetLength ()); 531 // We are dumping at least one child 532 while (separator_idx != std::string::npos) 533 { 534 // Calculate the next separator index ahead of time 535 ValueObjectSP child_valobj_sp; 536 const char separator_type = var_path[0]; 537 switch (separator_type) 538 { 539 540 case '-': 541 if (var_path.size() >= 2 && var_path[1] != '>') 542 return ValueObjectSP(); 543 544 if (no_fragile_ivar) 545 { 546 // Make sure we aren't trying to deref an objective 547 // C ivar if this is not allowed 548 const uint32_t pointer_type_flags = ClangASTContext::GetTypeInfo (valobj_sp->GetClangType(), NULL, NULL); 549 if ((pointer_type_flags & ClangASTContext::eTypeIsObjC) && 550 (pointer_type_flags & ClangASTContext::eTypeIsPointer)) 551 { 552 // This was an objective C object pointer and 553 // it was requested we skip any fragile ivars 554 // so return nothing here 555 return ValueObjectSP(); 556 } 557 } 558 var_path.erase (0, 1); // Remove the '-' 559 // Fall through 560 case '.': 561 { 562 const bool expr_is_ptr = var_path[0] == '>'; 563 564 var_path.erase (0, 1); // Remove the '.' or '>' 565 separator_idx = var_path.find_first_of(".-["); 566 ConstString child_name; 567 if (separator_idx == std::string::npos) 568 child_name.SetCString (var_path.c_str()); 569 else 570 child_name.SetCStringWithLength(var_path.c_str(), separator_idx); 571 572 if (check_ptr_vs_member) 573 { 574 // We either have a pointer type and need to verify 575 // valobj_sp is a pointer, or we have a member of a 576 // class/union/struct being accessed with the . syntax 577 // and need to verify we don't have a pointer. 578 const bool actual_is_ptr = valobj_sp->IsPointerType (); 579 580 if (actual_is_ptr != expr_is_ptr) 581 { 582 // Incorrect use of "." with a pointer, or "->" with 583 // a class/union/struct instance or reference. 584 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 585 if (actual_is_ptr) 586 error.SetErrorStringWithFormat ("\"%s\" is a pointer and . was used to attempt to access \"%s\". Did you mean \"%s->%s\"?", 587 var_expr_path_strm.GetString().c_str(), 588 child_name.GetCString(), 589 var_expr_path_strm.GetString().c_str(), 590 var_path.c_str()); 591 else 592 error.SetErrorStringWithFormat ("\"%s\" is not a pointer and -> was used to attempt to access \"%s\". Did you mean \"%s.%s\"?", 593 var_expr_path_strm.GetString().c_str(), 594 child_name.GetCString(), 595 var_expr_path_strm.GetString().c_str(), 596 var_path.c_str()); 597 return ValueObjectSP(); 598 } 599 } 600 601 child_valobj_sp = valobj_sp->GetChildMemberWithName (child_name, true); 602 if (!child_valobj_sp) 603 { 604 // No child member with name "child_name" 605 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 606 if (child_name) 607 { 608 error.SetErrorStringWithFormat ("\"%s\" is not a member of \"(%s) %s\"", 609 child_name.GetCString(), 610 valobj_sp->GetTypeName().AsCString("<invalid type>"), 611 var_expr_path_strm.GetString().c_str()); 612 } 613 else 614 { 615 error.SetErrorStringWithFormat ("incomplete expression path after \"%s\" in \"%s\"", 616 var_expr_path_strm.GetString().c_str(), 617 var_expr_cstr); 618 } 619 620 return ValueObjectSP(); 621 } 622 // Remove the child name from the path 623 var_path.erase(0, child_name.GetLength()); 624 } 625 break; 626 627 case '[': 628 // Array member access, or treating pointer as an array 629 if (var_path.size() > 2) // Need at least two brackets and a number 630 { 631 char *end = NULL; 632 long child_index = ::strtol (&var_path[1], &end, 0); 633 if (end && *end == ']') 634 { 635 636 if (valobj_sp->IsPointerType ()) 637 { 638 child_valobj_sp = valobj_sp->GetSyntheticArrayMemberFromPointer (child_index, true); 639 if (!child_valobj_sp) 640 { 641 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 642 error.SetErrorStringWithFormat ("failed to use pointer as array for index %i for \"(%s) %s\"", 643 child_index, 644 valobj_sp->GetTypeName().AsCString("<invalid type>"), 645 var_expr_path_strm.GetString().c_str()); 646 } 647 } 648 else if (ClangASTContext::IsArrayType (valobj_sp->GetClangType(), NULL, NULL)) 649 { 650 child_valobj_sp = valobj_sp->GetChildAtIndex (child_index, true); 651 if (!child_valobj_sp) 652 { 653 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 654 error.SetErrorStringWithFormat ("array index %i is not valid for \"(%s) %s\"", 655 child_index, 656 valobj_sp->GetTypeName().AsCString("<invalid type>"), 657 var_expr_path_strm.GetString().c_str()); 658 } 659 } 660 else 661 { 662 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 663 error.SetErrorStringWithFormat ("\"(%s) %s\" is not an array type", 664 valobj_sp->GetTypeName().AsCString("<invalid type>"), 665 var_expr_path_strm.GetString().c_str()); 666 } 667 668 if (!child_valobj_sp) 669 { 670 // Invalid array index... 671 return ValueObjectSP(); 672 } 673 674 // Erase the array member specification '[%i]' where 675 // %i is the array index 676 var_path.erase(0, (end - var_path.c_str()) + 1); 677 separator_idx = var_path.find_first_of(".-["); 678 679 // Break out early from the switch since we were 680 // able to find the child member 681 break; 682 } 683 } 684 return ValueObjectSP(); 685 686 default: 687 // Failure... 688 { 689 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 690 error.SetErrorStringWithFormat ("unexpected char '%c' encountered after \"%s\" in \"%s\"", 691 separator_type, 692 var_expr_path_strm.GetString().c_str(), 693 var_path.c_str()); 694 695 return ValueObjectSP(); 696 } 697 } 698 699 if (child_valobj_sp) 700 valobj_sp = child_valobj_sp; 701 702 if (var_path.empty()) 703 break; 704 705 } 706 if (valobj_sp) 707 { 708 if (deref) 709 { 710 ValueObjectSP deref_valobj_sp (valobj_sp->Dereference(error)); 711 valobj_sp = deref_valobj_sp; 712 } 713 else if (address_of) 714 { 715 ValueObjectSP address_of_valobj_sp (valobj_sp->AddressOf(error)); 716 valobj_sp = address_of_valobj_sp; 717 } 718 } 719 return valobj_sp; 720 } 721 else 722 { 723 error.SetErrorStringWithFormat("no variable named '%s' found in this frame", name_const_string.GetCString()); 724 } 725 } 726 } 727 else 728 { 729 error.SetErrorStringWithFormat("invalid variable path '%s'", var_expr_cstr); 730 } 731 return ValueObjectSP(); 732 } 733 734 bool 735 StackFrame::GetFrameBaseValue (Scalar &frame_base, Error *error_ptr) 736 { 737 if (m_flags.IsClear(GOT_FRAME_BASE)) 738 { 739 if (m_sc.function) 740 { 741 m_frame_base.Clear(); 742 m_frame_base_error.Clear(); 743 744 m_flags.Set(GOT_FRAME_BASE); 745 ExecutionContext exe_ctx (&m_thread.GetProcess(), &m_thread, this); 746 Value expr_value; 747 addr_t loclist_base_addr = LLDB_INVALID_ADDRESS; 748 if (m_sc.function->GetFrameBaseExpression().IsLocationList()) 749 loclist_base_addr = m_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (&m_thread.GetProcess().GetTarget()); 750 751 if (m_sc.function->GetFrameBaseExpression().Evaluate(&exe_ctx, NULL, NULL, NULL, NULL, loclist_base_addr, NULL, expr_value, &m_frame_base_error) == false) 752 { 753 // We should really have an error if evaluate returns, but in case 754 // we don't, lets set the error to something at least. 755 if (m_frame_base_error.Success()) 756 m_frame_base_error.SetErrorString("Evaluation of the frame base expression failed."); 757 } 758 else 759 { 760 m_frame_base = expr_value.ResolveValue(&exe_ctx, NULL); 761 } 762 } 763 else 764 { 765 m_frame_base_error.SetErrorString ("No function in symbol context."); 766 } 767 } 768 769 if (m_frame_base_error.Success()) 770 frame_base = m_frame_base; 771 772 if (error_ptr) 773 *error_ptr = m_frame_base_error; 774 return m_frame_base_error.Success(); 775 } 776 777 RegisterContextSP 778 StackFrame::GetRegisterContext () 779 { 780 if (!m_reg_context_sp) 781 m_reg_context_sp = m_thread.CreateRegisterContextForFrame (this); 782 return m_reg_context_sp; 783 } 784 785 bool 786 StackFrame::HasDebugInformation () 787 { 788 GetSymbolContext (eSymbolContextLineEntry); 789 return m_sc.line_entry.IsValid(); 790 } 791 792 793 ValueObjectSP 794 StackFrame::GetValueObjectForFrameVariable (const VariableSP &variable_sp) 795 { 796 ValueObjectSP valobj_sp; 797 VariableList *var_list = GetVariableList (true); 798 if (var_list) 799 { 800 // Make sure the variable is a frame variable 801 const uint32_t var_idx = var_list->FindIndexForVariable (variable_sp.get()); 802 const uint32_t num_variables = var_list->GetSize(); 803 if (var_idx < num_variables) 804 { 805 valobj_sp = m_variable_list_value_objects.GetValueObjectAtIndex (var_idx); 806 if (valobj_sp.get() == NULL) 807 { 808 if (m_variable_list_value_objects.GetSize() < num_variables) 809 m_variable_list_value_objects.Resize(num_variables); 810 valobj_sp.reset (new ValueObjectVariable (variable_sp)); 811 m_variable_list_value_objects.SetValueObjectAtIndex (var_idx, valobj_sp); 812 } 813 } 814 } 815 return valobj_sp; 816 } 817 818 ValueObjectSP 819 StackFrame::TrackGlobalVariable (const VariableSP &variable_sp) 820 { 821 // Check to make sure we aren't already tracking this variable? 822 ValueObjectSP valobj_sp (GetValueObjectForFrameVariable (variable_sp)); 823 if (!valobj_sp) 824 { 825 // We aren't already tracking this global 826 VariableList *var_list = GetVariableList (true); 827 // If this frame has no variables, create a new list 828 if (var_list == NULL) 829 m_variable_list_sp.reset (new VariableList()); 830 831 // Add the global/static variable to this frame 832 m_variable_list_sp->AddVariable (variable_sp); 833 834 // Now make a value object for it so we can track its changes 835 valobj_sp = GetValueObjectForFrameVariable (variable_sp); 836 } 837 return valobj_sp; 838 } 839 840 bool 841 StackFrame::IsInlined () 842 { 843 if (m_sc.block == NULL) 844 GetSymbolContext (eSymbolContextBlock); 845 if (m_sc.block) 846 return m_sc.block->GetContainingInlinedBlock() != NULL; 847 return false; 848 } 849 850 Target * 851 StackFrame::CalculateTarget () 852 { 853 return m_thread.CalculateTarget(); 854 } 855 856 Process * 857 StackFrame::CalculateProcess () 858 { 859 return m_thread.CalculateProcess(); 860 } 861 862 Thread * 863 StackFrame::CalculateThread () 864 { 865 return &m_thread; 866 } 867 868 StackFrame * 869 StackFrame::CalculateStackFrame () 870 { 871 return this; 872 } 873 874 875 void 876 StackFrame::CalculateExecutionContext (ExecutionContext &exe_ctx) 877 { 878 m_thread.CalculateExecutionContext (exe_ctx); 879 exe_ctx.frame = this; 880 } 881 882 void 883 StackFrame::DumpUsingSettingsFormat (Stream *strm) 884 { 885 if (strm == NULL) 886 return; 887 888 GetSymbolContext(eSymbolContextEverything); 889 ExecutionContext exe_ctx; 890 CalculateExecutionContext(exe_ctx); 891 const char *end = NULL; 892 StreamString s; 893 const char *frame_format = m_thread.GetProcess().GetTarget().GetDebugger().GetFrameFormat(); 894 if (frame_format && Debugger::FormatPrompt (frame_format, &m_sc, &exe_ctx, NULL, s, &end)) 895 { 896 strm->Write(s.GetData(), s.GetSize()); 897 } 898 else 899 { 900 Dump (strm, true, false); 901 strm->EOL(); 902 } 903 } 904 905 void 906 StackFrame::Dump (Stream *strm, bool show_frame_index, bool show_fullpaths) 907 { 908 if (strm == NULL) 909 return; 910 911 if (show_frame_index) 912 strm->Printf("frame #%u: ", m_frame_index); 913 strm->Printf("0x%0*llx ", m_thread.GetProcess().GetAddressByteSize() * 2, GetFrameCodeAddress().GetLoadAddress(&m_thread.GetProcess().GetTarget())); 914 GetSymbolContext(eSymbolContextEverything); 915 const bool show_module = true; 916 const bool show_inline = true; 917 m_sc.DumpStopContext(strm, &m_thread.GetProcess(), GetFrameCodeAddress(), show_fullpaths, show_module, show_inline); 918 } 919 920 void 921 StackFrame::UpdateCurrentFrameFromPreviousFrame (StackFrame &prev_frame) 922 { 923 assert (GetStackID() == prev_frame.GetStackID()); // TODO: remove this after some testing 924 m_variable_list_sp = prev_frame.m_variable_list_sp; 925 m_variable_list_value_objects.Swap (prev_frame.m_variable_list_value_objects); 926 if (!m_disassembly.GetString().empty()) 927 m_disassembly.GetString().swap (m_disassembly.GetString()); 928 } 929 930 931 void 932 StackFrame::UpdatePreviousFrameFromCurrentFrame (StackFrame &curr_frame) 933 { 934 assert (GetStackID() == curr_frame.GetStackID()); // TODO: remove this after some testing 935 m_id.SetPC (curr_frame.m_id.GetPC()); // Update the Stack ID PC value 936 assert (&m_thread == &curr_frame.m_thread); 937 m_frame_index = curr_frame.m_frame_index; 938 m_concrete_frame_index = curr_frame.m_concrete_frame_index; 939 m_reg_context_sp = curr_frame.m_reg_context_sp; 940 m_frame_code_addr = curr_frame.m_frame_code_addr; 941 assert (m_sc.target_sp.get() == NULL || curr_frame.m_sc.target_sp.get() == NULL || m_sc.target_sp.get() == curr_frame.m_sc.target_sp.get()); 942 assert (m_sc.module_sp.get() == NULL || curr_frame.m_sc.module_sp.get() == NULL || m_sc.module_sp.get() == curr_frame.m_sc.module_sp.get()); 943 assert (m_sc.comp_unit == NULL || curr_frame.m_sc.comp_unit == NULL || m_sc.comp_unit == curr_frame.m_sc.comp_unit); 944 assert (m_sc.function == NULL || curr_frame.m_sc.function == NULL || m_sc.function == curr_frame.m_sc.function); 945 m_sc = curr_frame.m_sc; 946 m_flags.Clear(GOT_FRAME_BASE | eSymbolContextEverything); 947 m_flags.Set (m_sc.GetResolvedMask()); 948 m_frame_base.Clear(); 949 m_frame_base_error.Clear(); 950 } 951 952 953 bool 954 StackFrame::HasCachedData () const 955 { 956 if (m_variable_list_sp.get()) 957 return true; 958 if (m_variable_list_value_objects.GetSize() > 0) 959 return true; 960 if (!m_disassembly.GetString().empty()) 961 return true; 962 return false; 963 } 964 965 lldb::StackFrameSP 966 StackFrame::GetSP () 967 { 968 return m_thread.GetStackFrameSPForStackFramePtr (this); 969 } 970