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 false, 265 m_disassembly); 266 if (m_disassembly.GetSize() == 0) 267 return NULL; 268 } 269 return m_disassembly.GetData(); 270 } 271 272 Block * 273 StackFrame::GetFrameBlock () 274 { 275 if (m_sc.block == NULL && m_flags.IsClear (eSymbolContextBlock)) 276 GetSymbolContext (eSymbolContextBlock); 277 278 if (m_sc.block) 279 { 280 Block *inline_block = m_sc.block->GetContainingInlinedBlock(); 281 if (inline_block) 282 { 283 // Use the block with the inlined function info 284 // as the frame block we want this frame to have only the variables 285 // for the inlined function and its non-inlined block child blocks. 286 return inline_block; 287 } 288 else 289 { 290 // This block is not contained withing any inlined function blocks 291 // with so we want to use the top most function block. 292 return &m_sc.function->GetBlock (false); 293 } 294 } 295 return NULL; 296 } 297 298 //---------------------------------------------------------------------- 299 // Get the symbol context if we already haven't done so by resolving the 300 // PC address as much as possible. This way when we pass around a 301 // StackFrame object, everyone will have as much information as 302 // possible and no one will ever have to look things up manually. 303 //---------------------------------------------------------------------- 304 const SymbolContext& 305 StackFrame::GetSymbolContext (uint32_t resolve_scope) 306 { 307 // Copy our internal symbol context into "sc". 308 if ((m_flags.Get() & resolve_scope) != resolve_scope) 309 { 310 // Resolve our PC to section offset if we haven't alreday done so 311 // and if we don't have a module. The resolved address section will 312 // contain the module to which it belongs 313 if (!m_sc.module_sp && m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR)) 314 GetFrameCodeAddress(); 315 316 // If this is not frame zero, then we need to subtract 1 from the PC 317 // value when doing address lookups since the PC will be on the 318 // instruction following the function call instruction... 319 320 Address lookup_addr(GetFrameCodeAddress()); 321 if (m_frame_index > 0 && lookup_addr.IsValid()) 322 { 323 addr_t offset = lookup_addr.GetOffset(); 324 if (offset > 0) 325 lookup_addr.SetOffset(offset - 1); 326 } 327 328 329 uint32_t resolved = 0; 330 if (m_sc.module_sp) 331 { 332 // We have something in our stack frame symbol context, lets check 333 // if we haven't already tried to lookup one of those things. If we 334 // haven't then we will do the query. 335 336 uint32_t actual_resolve_scope = 0; 337 338 if (resolve_scope & eSymbolContextCompUnit) 339 { 340 if (m_flags.IsClear (eSymbolContextCompUnit)) 341 { 342 if (m_sc.comp_unit) 343 resolved |= eSymbolContextCompUnit; 344 else 345 actual_resolve_scope |= eSymbolContextCompUnit; 346 } 347 } 348 349 if (resolve_scope & eSymbolContextFunction) 350 { 351 if (m_flags.IsClear (eSymbolContextFunction)) 352 { 353 if (m_sc.function) 354 resolved |= eSymbolContextFunction; 355 else 356 actual_resolve_scope |= eSymbolContextFunction; 357 } 358 } 359 360 if (resolve_scope & eSymbolContextBlock) 361 { 362 if (m_flags.IsClear (eSymbolContextBlock)) 363 { 364 if (m_sc.block) 365 resolved |= eSymbolContextBlock; 366 else 367 actual_resolve_scope |= eSymbolContextBlock; 368 } 369 } 370 371 if (resolve_scope & eSymbolContextSymbol) 372 { 373 if (m_flags.IsClear (eSymbolContextSymbol)) 374 { 375 if (m_sc.symbol) 376 resolved |= eSymbolContextSymbol; 377 else 378 actual_resolve_scope |= eSymbolContextSymbol; 379 } 380 } 381 382 if (resolve_scope & eSymbolContextLineEntry) 383 { 384 if (m_flags.IsClear (eSymbolContextLineEntry)) 385 { 386 if (m_sc.line_entry.IsValid()) 387 resolved |= eSymbolContextLineEntry; 388 else 389 actual_resolve_scope |= eSymbolContextLineEntry; 390 } 391 } 392 393 if (actual_resolve_scope) 394 { 395 // We might be resolving less information than what is already 396 // in our current symbol context so resolve into a temporary 397 // symbol context "sc" so we don't clear out data we have 398 // already found in "m_sc" 399 SymbolContext sc; 400 // Set flags that indicate what we have tried to resolve 401 resolved |= m_sc.module_sp->ResolveSymbolContextForAddress (lookup_addr, actual_resolve_scope, sc); 402 // Only replace what we didn't already have as we may have 403 // information for an inlined function scope that won't match 404 // what a standard lookup by address would match 405 if ((resolved & eSymbolContextCompUnit) && m_sc.comp_unit == NULL) 406 m_sc.comp_unit = sc.comp_unit; 407 if ((resolved & eSymbolContextFunction) && m_sc.function == NULL) 408 m_sc.function = sc.function; 409 if ((resolved & eSymbolContextBlock) && m_sc.block == NULL) 410 m_sc.block = sc.block; 411 if ((resolved & eSymbolContextSymbol) && m_sc.symbol == NULL) 412 m_sc.symbol = sc.symbol; 413 if ((resolved & eSymbolContextLineEntry) && !m_sc.line_entry.IsValid()) 414 m_sc.line_entry = sc.line_entry; 415 416 } 417 } 418 else 419 { 420 // If we don't have a module, then we can't have the compile unit, 421 // function, block, line entry or symbol, so we can safely call 422 // ResolveSymbolContextForAddress with our symbol context member m_sc. 423 resolved |= m_thread.GetProcess().GetTarget().GetImages().ResolveSymbolContextForAddress (lookup_addr, resolve_scope, m_sc); 424 } 425 426 // If the target was requested add that: 427 if (m_sc.target_sp.get() == NULL) 428 { 429 m_sc.target_sp = CalculateProcess()->GetTarget().GetSP(); 430 if (m_sc.target_sp) 431 resolved |= eSymbolContextTarget; 432 } 433 434 // Update our internal flags so we remember what we have tried to locate so 435 // we don't have to keep trying when more calls to this function are made. 436 // We might have dug up more information that was requested (for example 437 // if we were asked to only get the block, we will have gotten the 438 // compile unit, and function) so set any additional bits that we resolved 439 m_flags.Set (resolve_scope | resolved); 440 } 441 442 // Return the symbol context with everything that was possible to resolve 443 // resolved. 444 return m_sc; 445 } 446 447 448 VariableList * 449 StackFrame::GetVariableList (bool get_file_globals) 450 { 451 if (m_flags.IsClear(RESOLVED_VARIABLES)) 452 { 453 m_flags.Set(RESOLVED_VARIABLES); 454 455 Block *frame_block = GetFrameBlock(); 456 457 if (frame_block) 458 { 459 const bool get_child_variables = true; 460 const bool can_create = true; 461 m_variable_list_sp = frame_block->GetVariableList (get_child_variables, can_create); 462 } 463 } 464 465 if (m_flags.IsClear(RESOLVED_GLOBAL_VARIABLES) && 466 get_file_globals) 467 { 468 m_flags.Set(RESOLVED_GLOBAL_VARIABLES); 469 470 if (m_flags.IsClear (eSymbolContextCompUnit)) 471 GetSymbolContext (eSymbolContextCompUnit); 472 473 if (m_sc.comp_unit) 474 { 475 VariableListSP global_variable_list_sp (m_sc.comp_unit->GetVariableList(true)); 476 if (m_variable_list_sp) 477 m_variable_list_sp->AddVariables (global_variable_list_sp.get()); 478 else 479 m_variable_list_sp = global_variable_list_sp; 480 } 481 } 482 483 return m_variable_list_sp.get(); 484 } 485 486 ValueObjectSP 487 StackFrame::GetValueForVariableExpressionPath (const char *var_expr_cstr, uint32_t options, Error &error) 488 { 489 490 if (var_expr_cstr && var_expr_cstr[0]) 491 { 492 const bool check_ptr_vs_member = (options & eExpressionPathOptionCheckPtrVsMember) != 0; 493 const bool no_fragile_ivar = (options & eExpressionPathOptionsNoFragileObjcIvar) != 0; 494 error.Clear(); 495 bool deref = false; 496 bool address_of = false; 497 ValueObjectSP valobj_sp; 498 const bool get_file_globals = true; 499 VariableList *variable_list = GetVariableList (get_file_globals); 500 501 if (variable_list) 502 { 503 // If first character is a '*', then show pointer contents 504 const char *var_expr = var_expr_cstr; 505 if (var_expr[0] == '*') 506 { 507 deref = true; 508 var_expr++; // Skip the '*' 509 } 510 else if (var_expr[0] == '&') 511 { 512 address_of = true; 513 var_expr++; // Skip the '&' 514 } 515 516 std::string var_path (var_expr); 517 size_t separator_idx = var_path.find_first_of(".-[=+~|&^%#@!/?,<>{}"); 518 StreamString var_expr_path_strm; 519 520 ConstString name_const_string; 521 if (separator_idx == std::string::npos) 522 name_const_string.SetCString (var_path.c_str()); 523 else 524 name_const_string.SetCStringWithLength (var_path.c_str(), separator_idx); 525 526 VariableSP var_sp (variable_list->FindVariable(name_const_string)); 527 if (var_sp) 528 { 529 valobj_sp = GetValueObjectForFrameVariable (var_sp); 530 531 var_path.erase (0, name_const_string.GetLength ()); 532 // We are dumping at least one child 533 while (separator_idx != std::string::npos) 534 { 535 // Calculate the next separator index ahead of time 536 ValueObjectSP child_valobj_sp; 537 const char separator_type = var_path[0]; 538 switch (separator_type) 539 { 540 541 case '-': 542 if (var_path.size() >= 2 && var_path[1] != '>') 543 return ValueObjectSP(); 544 545 if (no_fragile_ivar) 546 { 547 // Make sure we aren't trying to deref an objective 548 // C ivar if this is not allowed 549 const uint32_t pointer_type_flags = ClangASTContext::GetTypeInfo (valobj_sp->GetClangType(), NULL, NULL); 550 if ((pointer_type_flags & ClangASTContext::eTypeIsObjC) && 551 (pointer_type_flags & ClangASTContext::eTypeIsPointer)) 552 { 553 // This was an objective C object pointer and 554 // it was requested we skip any fragile ivars 555 // so return nothing here 556 return ValueObjectSP(); 557 } 558 } 559 var_path.erase (0, 1); // Remove the '-' 560 // Fall through 561 case '.': 562 { 563 const bool expr_is_ptr = var_path[0] == '>'; 564 565 var_path.erase (0, 1); // Remove the '.' or '>' 566 separator_idx = var_path.find_first_of(".-["); 567 ConstString child_name; 568 if (separator_idx == std::string::npos) 569 child_name.SetCString (var_path.c_str()); 570 else 571 child_name.SetCStringWithLength(var_path.c_str(), separator_idx); 572 573 if (check_ptr_vs_member) 574 { 575 // We either have a pointer type and need to verify 576 // valobj_sp is a pointer, or we have a member of a 577 // class/union/struct being accessed with the . syntax 578 // and need to verify we don't have a pointer. 579 const bool actual_is_ptr = valobj_sp->IsPointerType (); 580 581 if (actual_is_ptr != expr_is_ptr) 582 { 583 // Incorrect use of "." with a pointer, or "->" with 584 // a class/union/struct instance or reference. 585 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 586 if (actual_is_ptr) 587 error.SetErrorStringWithFormat ("\"%s\" is a pointer and . was used to attempt to access \"%s\". Did you mean \"%s->%s\"?", 588 var_expr_path_strm.GetString().c_str(), 589 child_name.GetCString(), 590 var_expr_path_strm.GetString().c_str(), 591 var_path.c_str()); 592 else 593 error.SetErrorStringWithFormat ("\"%s\" is not a pointer and -> was used to attempt to access \"%s\". Did you mean \"%s.%s\"?", 594 var_expr_path_strm.GetString().c_str(), 595 child_name.GetCString(), 596 var_expr_path_strm.GetString().c_str(), 597 var_path.c_str()); 598 return ValueObjectSP(); 599 } 600 } 601 602 child_valobj_sp = valobj_sp->GetChildMemberWithName (child_name, true); 603 if (!child_valobj_sp) 604 { 605 // No child member with name "child_name" 606 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 607 if (child_name) 608 { 609 error.SetErrorStringWithFormat ("\"%s\" is not a member of \"(%s) %s\"", 610 child_name.GetCString(), 611 valobj_sp->GetTypeName().AsCString("<invalid type>"), 612 var_expr_path_strm.GetString().c_str()); 613 } 614 else 615 { 616 error.SetErrorStringWithFormat ("incomplete expression path after \"%s\" in \"%s\"", 617 var_expr_path_strm.GetString().c_str(), 618 var_expr_cstr); 619 } 620 621 return ValueObjectSP(); 622 } 623 // Remove the child name from the path 624 var_path.erase(0, child_name.GetLength()); 625 } 626 break; 627 628 case '[': 629 // Array member access, or treating pointer as an array 630 if (var_path.size() > 2) // Need at least two brackets and a number 631 { 632 char *end = NULL; 633 long child_index = ::strtol (&var_path[1], &end, 0); 634 if (end && *end == ']') 635 { 636 637 if (valobj_sp->IsPointerType ()) 638 { 639 child_valobj_sp = valobj_sp->GetSyntheticArrayMemberFromPointer (child_index, true); 640 if (!child_valobj_sp) 641 { 642 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 643 error.SetErrorStringWithFormat ("failed to use pointer as array for index %i for \"(%s) %s\"", 644 child_index, 645 valobj_sp->GetTypeName().AsCString("<invalid type>"), 646 var_expr_path_strm.GetString().c_str()); 647 } 648 } 649 else if (ClangASTContext::IsArrayType (valobj_sp->GetClangType(), NULL, NULL)) 650 { 651 child_valobj_sp = valobj_sp->GetChildAtIndex (child_index, true); 652 if (!child_valobj_sp) 653 { 654 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 655 error.SetErrorStringWithFormat ("array index %i is not valid for \"(%s) %s\"", 656 child_index, 657 valobj_sp->GetTypeName().AsCString("<invalid type>"), 658 var_expr_path_strm.GetString().c_str()); 659 } 660 } 661 else 662 { 663 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 664 error.SetErrorStringWithFormat ("\"(%s) %s\" is not an array type", 665 valobj_sp->GetTypeName().AsCString("<invalid type>"), 666 var_expr_path_strm.GetString().c_str()); 667 } 668 669 if (!child_valobj_sp) 670 { 671 // Invalid array index... 672 return ValueObjectSP(); 673 } 674 675 // Erase the array member specification '[%i]' where 676 // %i is the array index 677 var_path.erase(0, (end - var_path.c_str()) + 1); 678 separator_idx = var_path.find_first_of(".-["); 679 680 // Break out early from the switch since we were 681 // able to find the child member 682 break; 683 } 684 } 685 return ValueObjectSP(); 686 687 default: 688 // Failure... 689 { 690 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 691 error.SetErrorStringWithFormat ("unexpected char '%c' encountered after \"%s\" in \"%s\"", 692 separator_type, 693 var_expr_path_strm.GetString().c_str(), 694 var_path.c_str()); 695 696 return ValueObjectSP(); 697 } 698 } 699 700 if (child_valobj_sp) 701 valobj_sp = child_valobj_sp; 702 703 if (var_path.empty()) 704 break; 705 706 } 707 if (valobj_sp) 708 { 709 if (deref) 710 { 711 ValueObjectSP deref_valobj_sp (valobj_sp->Dereference(error)); 712 valobj_sp = deref_valobj_sp; 713 } 714 else if (address_of) 715 { 716 ValueObjectSP address_of_valobj_sp (valobj_sp->AddressOf(error)); 717 valobj_sp = address_of_valobj_sp; 718 } 719 } 720 return valobj_sp; 721 } 722 else 723 { 724 error.SetErrorStringWithFormat("no variable named '%s' found in this frame", name_const_string.GetCString()); 725 } 726 } 727 } 728 else 729 { 730 error.SetErrorStringWithFormat("invalid variable path '%s'", var_expr_cstr); 731 } 732 return ValueObjectSP(); 733 } 734 735 bool 736 StackFrame::GetFrameBaseValue (Scalar &frame_base, Error *error_ptr) 737 { 738 if (m_flags.IsClear(GOT_FRAME_BASE)) 739 { 740 if (m_sc.function) 741 { 742 m_frame_base.Clear(); 743 m_frame_base_error.Clear(); 744 745 m_flags.Set(GOT_FRAME_BASE); 746 ExecutionContext exe_ctx (&m_thread.GetProcess(), &m_thread, this); 747 Value expr_value; 748 addr_t loclist_base_addr = LLDB_INVALID_ADDRESS; 749 if (m_sc.function->GetFrameBaseExpression().IsLocationList()) 750 loclist_base_addr = m_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (&m_thread.GetProcess().GetTarget()); 751 752 if (m_sc.function->GetFrameBaseExpression().Evaluate(&exe_ctx, NULL, NULL, NULL, NULL, loclist_base_addr, NULL, expr_value, &m_frame_base_error) == false) 753 { 754 // We should really have an error if evaluate returns, but in case 755 // we don't, lets set the error to something at least. 756 if (m_frame_base_error.Success()) 757 m_frame_base_error.SetErrorString("Evaluation of the frame base expression failed."); 758 } 759 else 760 { 761 m_frame_base = expr_value.ResolveValue(&exe_ctx, NULL); 762 } 763 } 764 else 765 { 766 m_frame_base_error.SetErrorString ("No function in symbol context."); 767 } 768 } 769 770 if (m_frame_base_error.Success()) 771 frame_base = m_frame_base; 772 773 if (error_ptr) 774 *error_ptr = m_frame_base_error; 775 return m_frame_base_error.Success(); 776 } 777 778 RegisterContextSP 779 StackFrame::GetRegisterContext () 780 { 781 if (!m_reg_context_sp) 782 m_reg_context_sp = m_thread.CreateRegisterContextForFrame (this); 783 return m_reg_context_sp; 784 } 785 786 bool 787 StackFrame::HasDebugInformation () 788 { 789 GetSymbolContext (eSymbolContextLineEntry); 790 return m_sc.line_entry.IsValid(); 791 } 792 793 794 ValueObjectSP 795 StackFrame::GetValueObjectForFrameVariable (const VariableSP &variable_sp) 796 { 797 ValueObjectSP valobj_sp; 798 VariableList *var_list = GetVariableList (true); 799 if (var_list) 800 { 801 // Make sure the variable is a frame variable 802 const uint32_t var_idx = var_list->FindIndexForVariable (variable_sp.get()); 803 const uint32_t num_variables = var_list->GetSize(); 804 if (var_idx < num_variables) 805 { 806 valobj_sp = m_variable_list_value_objects.GetValueObjectAtIndex (var_idx); 807 if (valobj_sp.get() == NULL) 808 { 809 if (m_variable_list_value_objects.GetSize() < num_variables) 810 m_variable_list_value_objects.Resize(num_variables); 811 valobj_sp.reset (new ValueObjectVariable (variable_sp)); 812 m_variable_list_value_objects.SetValueObjectAtIndex (var_idx, valobj_sp); 813 } 814 } 815 } 816 return valobj_sp; 817 } 818 819 ValueObjectSP 820 StackFrame::TrackGlobalVariable (const VariableSP &variable_sp) 821 { 822 // Check to make sure we aren't already tracking this variable? 823 ValueObjectSP valobj_sp (GetValueObjectForFrameVariable (variable_sp)); 824 if (!valobj_sp) 825 { 826 // We aren't already tracking this global 827 VariableList *var_list = GetVariableList (true); 828 // If this frame has no variables, create a new list 829 if (var_list == NULL) 830 m_variable_list_sp.reset (new VariableList()); 831 832 // Add the global/static variable to this frame 833 m_variable_list_sp->AddVariable (variable_sp); 834 835 // Now make a value object for it so we can track its changes 836 valobj_sp = GetValueObjectForFrameVariable (variable_sp); 837 } 838 return valobj_sp; 839 } 840 841 bool 842 StackFrame::IsInlined () 843 { 844 if (m_sc.block == NULL) 845 GetSymbolContext (eSymbolContextBlock); 846 if (m_sc.block) 847 return m_sc.block->GetContainingInlinedBlock() != NULL; 848 return false; 849 } 850 851 Target * 852 StackFrame::CalculateTarget () 853 { 854 return m_thread.CalculateTarget(); 855 } 856 857 Process * 858 StackFrame::CalculateProcess () 859 { 860 return m_thread.CalculateProcess(); 861 } 862 863 Thread * 864 StackFrame::CalculateThread () 865 { 866 return &m_thread; 867 } 868 869 StackFrame * 870 StackFrame::CalculateStackFrame () 871 { 872 return this; 873 } 874 875 876 void 877 StackFrame::CalculateExecutionContext (ExecutionContext &exe_ctx) 878 { 879 m_thread.CalculateExecutionContext (exe_ctx); 880 exe_ctx.frame = this; 881 } 882 883 void 884 StackFrame::DumpUsingSettingsFormat (Stream *strm) 885 { 886 if (strm == NULL) 887 return; 888 889 GetSymbolContext(eSymbolContextEverything); 890 ExecutionContext exe_ctx; 891 CalculateExecutionContext(exe_ctx); 892 const char *end = NULL; 893 StreamString s; 894 const char *frame_format = m_thread.GetProcess().GetTarget().GetDebugger().GetFrameFormat(); 895 if (frame_format && Debugger::FormatPrompt (frame_format, &m_sc, &exe_ctx, NULL, s, &end)) 896 { 897 strm->Write(s.GetData(), s.GetSize()); 898 } 899 else 900 { 901 Dump (strm, true, false); 902 strm->EOL(); 903 } 904 } 905 906 void 907 StackFrame::Dump (Stream *strm, bool show_frame_index, bool show_fullpaths) 908 { 909 if (strm == NULL) 910 return; 911 912 if (show_frame_index) 913 strm->Printf("frame #%u: ", m_frame_index); 914 strm->Printf("0x%0*llx ", m_thread.GetProcess().GetTarget().GetArchitecture().GetAddressByteSize() * 2, GetFrameCodeAddress().GetLoadAddress(&m_thread.GetProcess().GetTarget())); 915 GetSymbolContext(eSymbolContextEverything); 916 const bool show_module = true; 917 const bool show_inline = true; 918 m_sc.DumpStopContext(strm, &m_thread.GetProcess(), GetFrameCodeAddress(), show_fullpaths, show_module, show_inline); 919 } 920 921 void 922 StackFrame::UpdateCurrentFrameFromPreviousFrame (StackFrame &prev_frame) 923 { 924 assert (GetStackID() == prev_frame.GetStackID()); // TODO: remove this after some testing 925 m_variable_list_sp = prev_frame.m_variable_list_sp; 926 m_variable_list_value_objects.Swap (prev_frame.m_variable_list_value_objects); 927 if (!m_disassembly.GetString().empty()) 928 m_disassembly.GetString().swap (m_disassembly.GetString()); 929 } 930 931 932 void 933 StackFrame::UpdatePreviousFrameFromCurrentFrame (StackFrame &curr_frame) 934 { 935 assert (GetStackID() == curr_frame.GetStackID()); // TODO: remove this after some testing 936 m_id.SetPC (curr_frame.m_id.GetPC()); // Update the Stack ID PC value 937 assert (&m_thread == &curr_frame.m_thread); 938 m_frame_index = curr_frame.m_frame_index; 939 m_concrete_frame_index = curr_frame.m_concrete_frame_index; 940 m_reg_context_sp = curr_frame.m_reg_context_sp; 941 m_frame_code_addr = curr_frame.m_frame_code_addr; 942 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()); 943 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()); 944 assert (m_sc.comp_unit == NULL || curr_frame.m_sc.comp_unit == NULL || m_sc.comp_unit == curr_frame.m_sc.comp_unit); 945 assert (m_sc.function == NULL || curr_frame.m_sc.function == NULL || m_sc.function == curr_frame.m_sc.function); 946 m_sc = curr_frame.m_sc; 947 m_flags.Clear(GOT_FRAME_BASE | eSymbolContextEverything); 948 m_flags.Set (m_sc.GetResolvedMask()); 949 m_frame_base.Clear(); 950 m_frame_base_error.Clear(); 951 } 952 953 954 bool 955 StackFrame::HasCachedData () const 956 { 957 if (m_variable_list_sp.get()) 958 return true; 959 if (m_variable_list_value_objects.GetSize() > 0) 960 return true; 961 if (!m_disassembly.GetString().empty()) 962 return true; 963 return false; 964 } 965 966 lldb::StackFrameSP 967 StackFrame::GetSP () 968 { 969 return m_thread.GetStackFrameSPForStackFramePtr (this); 970 } 971