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 0, 264 false, 265 false, 266 m_disassembly); 267 if (m_disassembly.GetSize() == 0) 268 return NULL; 269 } 270 return m_disassembly.GetData(); 271 } 272 273 Block * 274 StackFrame::GetFrameBlock () 275 { 276 if (m_sc.block == NULL && m_flags.IsClear (eSymbolContextBlock)) 277 GetSymbolContext (eSymbolContextBlock); 278 279 if (m_sc.block) 280 { 281 Block *inline_block = m_sc.block->GetContainingInlinedBlock(); 282 if (inline_block) 283 { 284 // Use the block with the inlined function info 285 // as the frame block we want this frame to have only the variables 286 // for the inlined function and its non-inlined block child blocks. 287 return inline_block; 288 } 289 else 290 { 291 // This block is not contained withing any inlined function blocks 292 // with so we want to use the top most function block. 293 return &m_sc.function->GetBlock (false); 294 } 295 } 296 return NULL; 297 } 298 299 //---------------------------------------------------------------------- 300 // Get the symbol context if we already haven't done so by resolving the 301 // PC address as much as possible. This way when we pass around a 302 // StackFrame object, everyone will have as much information as 303 // possible and no one will ever have to look things up manually. 304 //---------------------------------------------------------------------- 305 const SymbolContext& 306 StackFrame::GetSymbolContext (uint32_t resolve_scope) 307 { 308 // Copy our internal symbol context into "sc". 309 if ((m_flags.Get() & resolve_scope) != resolve_scope) 310 { 311 // Resolve our PC to section offset if we haven't alreday done so 312 // and if we don't have a module. The resolved address section will 313 // contain the module to which it belongs 314 if (!m_sc.module_sp && m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR)) 315 GetFrameCodeAddress(); 316 317 // If this is not frame zero, then we need to subtract 1 from the PC 318 // value when doing address lookups since the PC will be on the 319 // instruction following the function call instruction... 320 321 Address lookup_addr(GetFrameCodeAddress()); 322 if (m_frame_index > 0 && lookup_addr.IsValid()) 323 { 324 addr_t offset = lookup_addr.GetOffset(); 325 if (offset > 0) 326 lookup_addr.SetOffset(offset - 1); 327 } 328 329 330 uint32_t resolved = 0; 331 if (m_sc.module_sp) 332 { 333 // We have something in our stack frame symbol context, lets check 334 // if we haven't already tried to lookup one of those things. If we 335 // haven't then we will do the query. 336 337 uint32_t actual_resolve_scope = 0; 338 339 if (resolve_scope & eSymbolContextCompUnit) 340 { 341 if (m_flags.IsClear (eSymbolContextCompUnit)) 342 { 343 if (m_sc.comp_unit) 344 resolved |= eSymbolContextCompUnit; 345 else 346 actual_resolve_scope |= eSymbolContextCompUnit; 347 } 348 } 349 350 if (resolve_scope & eSymbolContextFunction) 351 { 352 if (m_flags.IsClear (eSymbolContextFunction)) 353 { 354 if (m_sc.function) 355 resolved |= eSymbolContextFunction; 356 else 357 actual_resolve_scope |= eSymbolContextFunction; 358 } 359 } 360 361 if (resolve_scope & eSymbolContextBlock) 362 { 363 if (m_flags.IsClear (eSymbolContextBlock)) 364 { 365 if (m_sc.block) 366 resolved |= eSymbolContextBlock; 367 else 368 actual_resolve_scope |= eSymbolContextBlock; 369 } 370 } 371 372 if (resolve_scope & eSymbolContextSymbol) 373 { 374 if (m_flags.IsClear (eSymbolContextSymbol)) 375 { 376 if (m_sc.symbol) 377 resolved |= eSymbolContextSymbol; 378 else 379 actual_resolve_scope |= eSymbolContextSymbol; 380 } 381 } 382 383 if (resolve_scope & eSymbolContextLineEntry) 384 { 385 if (m_flags.IsClear (eSymbolContextLineEntry)) 386 { 387 if (m_sc.line_entry.IsValid()) 388 resolved |= eSymbolContextLineEntry; 389 else 390 actual_resolve_scope |= eSymbolContextLineEntry; 391 } 392 } 393 394 if (actual_resolve_scope) 395 { 396 // We might be resolving less information than what is already 397 // in our current symbol context so resolve into a temporary 398 // symbol context "sc" so we don't clear out data we have 399 // already found in "m_sc" 400 SymbolContext sc; 401 // Set flags that indicate what we have tried to resolve 402 resolved |= m_sc.module_sp->ResolveSymbolContextForAddress (lookup_addr, actual_resolve_scope, sc); 403 // Only replace what we didn't already have as we may have 404 // information for an inlined function scope that won't match 405 // what a standard lookup by address would match 406 if ((resolved & eSymbolContextCompUnit) && m_sc.comp_unit == NULL) 407 m_sc.comp_unit = sc.comp_unit; 408 if ((resolved & eSymbolContextFunction) && m_sc.function == NULL) 409 m_sc.function = sc.function; 410 if ((resolved & eSymbolContextBlock) && m_sc.block == NULL) 411 m_sc.block = sc.block; 412 if ((resolved & eSymbolContextSymbol) && m_sc.symbol == NULL) 413 m_sc.symbol = sc.symbol; 414 if ((resolved & eSymbolContextLineEntry) && !m_sc.line_entry.IsValid()) 415 m_sc.line_entry = sc.line_entry; 416 417 } 418 } 419 else 420 { 421 // If we don't have a module, then we can't have the compile unit, 422 // function, block, line entry or symbol, so we can safely call 423 // ResolveSymbolContextForAddress with our symbol context member m_sc. 424 resolved |= m_thread.GetProcess().GetTarget().GetImages().ResolveSymbolContextForAddress (lookup_addr, resolve_scope, m_sc); 425 } 426 427 // If the target was requested add that: 428 if (m_sc.target_sp.get() == NULL) 429 { 430 m_sc.target_sp = CalculateProcess()->GetTarget().GetSP(); 431 if (m_sc.target_sp) 432 resolved |= eSymbolContextTarget; 433 } 434 435 // Update our internal flags so we remember what we have tried to locate so 436 // we don't have to keep trying when more calls to this function are made. 437 // We might have dug up more information that was requested (for example 438 // if we were asked to only get the block, we will have gotten the 439 // compile unit, and function) so set any additional bits that we resolved 440 m_flags.Set (resolve_scope | resolved); 441 } 442 443 // Return the symbol context with everything that was possible to resolve 444 // resolved. 445 return m_sc; 446 } 447 448 449 VariableList * 450 StackFrame::GetVariableList (bool get_file_globals) 451 { 452 if (m_flags.IsClear(RESOLVED_VARIABLES)) 453 { 454 m_flags.Set(RESOLVED_VARIABLES); 455 456 Block *frame_block = GetFrameBlock(); 457 458 if (frame_block) 459 { 460 const bool get_child_variables = true; 461 const bool can_create = true; 462 m_variable_list_sp = frame_block->GetVariableList (get_child_variables, can_create); 463 } 464 } 465 466 if (m_flags.IsClear(RESOLVED_GLOBAL_VARIABLES) && 467 get_file_globals) 468 { 469 m_flags.Set(RESOLVED_GLOBAL_VARIABLES); 470 471 if (m_flags.IsClear (eSymbolContextCompUnit)) 472 GetSymbolContext (eSymbolContextCompUnit); 473 474 if (m_sc.comp_unit) 475 { 476 VariableListSP global_variable_list_sp (m_sc.comp_unit->GetVariableList(true)); 477 if (m_variable_list_sp) 478 m_variable_list_sp->AddVariables (global_variable_list_sp.get()); 479 else 480 m_variable_list_sp = global_variable_list_sp; 481 } 482 } 483 484 return m_variable_list_sp.get(); 485 } 486 487 ValueObjectSP 488 StackFrame::GetValueForVariableExpressionPath (const char *var_expr_cstr, uint32_t options, Error &error) 489 { 490 491 if (var_expr_cstr && var_expr_cstr[0]) 492 { 493 const bool check_ptr_vs_member = (options & eExpressionPathOptionCheckPtrVsMember) != 0; 494 const bool no_fragile_ivar = (options & eExpressionPathOptionsNoFragileObjcIvar) != 0; 495 error.Clear(); 496 bool deref = false; 497 bool address_of = false; 498 ValueObjectSP valobj_sp; 499 const bool get_file_globals = true; 500 VariableList *variable_list = GetVariableList (get_file_globals); 501 502 if (variable_list) 503 { 504 // If first character is a '*', then show pointer contents 505 const char *var_expr = var_expr_cstr; 506 if (var_expr[0] == '*') 507 { 508 deref = true; 509 var_expr++; // Skip the '*' 510 } 511 else if (var_expr[0] == '&') 512 { 513 address_of = true; 514 var_expr++; // Skip the '&' 515 } 516 517 std::string var_path (var_expr); 518 size_t separator_idx = var_path.find_first_of(".-[=+~|&^%#@!/?,<>{}"); 519 StreamString var_expr_path_strm; 520 521 ConstString name_const_string; 522 if (separator_idx == std::string::npos) 523 name_const_string.SetCString (var_path.c_str()); 524 else 525 name_const_string.SetCStringWithLength (var_path.c_str(), separator_idx); 526 527 VariableSP var_sp (variable_list->FindVariable(name_const_string)); 528 if (var_sp) 529 { 530 valobj_sp = GetValueObjectForFrameVariable (var_sp); 531 532 var_path.erase (0, name_const_string.GetLength ()); 533 // We are dumping at least one child 534 while (separator_idx != std::string::npos) 535 { 536 // Calculate the next separator index ahead of time 537 ValueObjectSP child_valobj_sp; 538 const char separator_type = var_path[0]; 539 switch (separator_type) 540 { 541 542 case '-': 543 if (var_path.size() >= 2 && var_path[1] != '>') 544 return ValueObjectSP(); 545 546 if (no_fragile_ivar) 547 { 548 // Make sure we aren't trying to deref an objective 549 // C ivar if this is not allowed 550 const uint32_t pointer_type_flags = ClangASTContext::GetTypeInfo (valobj_sp->GetClangType(), NULL, NULL); 551 if ((pointer_type_flags & ClangASTContext::eTypeIsObjC) && 552 (pointer_type_flags & ClangASTContext::eTypeIsPointer)) 553 { 554 // This was an objective C object pointer and 555 // it was requested we skip any fragile ivars 556 // so return nothing here 557 return ValueObjectSP(); 558 } 559 } 560 var_path.erase (0, 1); // Remove the '-' 561 // Fall through 562 case '.': 563 { 564 const bool expr_is_ptr = var_path[0] == '>'; 565 566 var_path.erase (0, 1); // Remove the '.' or '>' 567 separator_idx = var_path.find_first_of(".-["); 568 ConstString child_name; 569 if (separator_idx == std::string::npos) 570 child_name.SetCString (var_path.c_str()); 571 else 572 child_name.SetCStringWithLength(var_path.c_str(), separator_idx); 573 574 if (check_ptr_vs_member) 575 { 576 // We either have a pointer type and need to verify 577 // valobj_sp is a pointer, or we have a member of a 578 // class/union/struct being accessed with the . syntax 579 // and need to verify we don't have a pointer. 580 const bool actual_is_ptr = valobj_sp->IsPointerType (); 581 582 if (actual_is_ptr != expr_is_ptr) 583 { 584 // Incorrect use of "." with a pointer, or "->" with 585 // a class/union/struct instance or reference. 586 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 587 if (actual_is_ptr) 588 error.SetErrorStringWithFormat ("\"%s\" is a pointer and . was used to attempt to access \"%s\". Did you mean \"%s->%s\"?", 589 var_expr_path_strm.GetString().c_str(), 590 child_name.GetCString(), 591 var_expr_path_strm.GetString().c_str(), 592 var_path.c_str()); 593 else 594 error.SetErrorStringWithFormat ("\"%s\" is not a pointer and -> was used to attempt to access \"%s\". Did you mean \"%s.%s\"?", 595 var_expr_path_strm.GetString().c_str(), 596 child_name.GetCString(), 597 var_expr_path_strm.GetString().c_str(), 598 var_path.c_str()); 599 return ValueObjectSP(); 600 } 601 } 602 603 child_valobj_sp = valobj_sp->GetChildMemberWithName (child_name, true); 604 if (!child_valobj_sp) 605 { 606 // No child member with name "child_name" 607 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 608 if (child_name) 609 { 610 error.SetErrorStringWithFormat ("\"%s\" is not a member of \"(%s) %s\"", 611 child_name.GetCString(), 612 valobj_sp->GetTypeName().AsCString("<invalid type>"), 613 var_expr_path_strm.GetString().c_str()); 614 } 615 else 616 { 617 error.SetErrorStringWithFormat ("incomplete expression path after \"%s\" in \"%s\"", 618 var_expr_path_strm.GetString().c_str(), 619 var_expr_cstr); 620 } 621 622 return ValueObjectSP(); 623 } 624 // Remove the child name from the path 625 var_path.erase(0, child_name.GetLength()); 626 } 627 break; 628 629 case '[': 630 // Array member access, or treating pointer as an array 631 if (var_path.size() > 2) // Need at least two brackets and a number 632 { 633 char *end = NULL; 634 long child_index = ::strtol (&var_path[1], &end, 0); 635 if (end && *end == ']') 636 { 637 638 if (valobj_sp->IsPointerType ()) 639 { 640 child_valobj_sp = valobj_sp->GetSyntheticArrayMemberFromPointer (child_index, true); 641 if (!child_valobj_sp) 642 { 643 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 644 error.SetErrorStringWithFormat ("failed to use pointer as array for index %i for \"(%s) %s\"", 645 child_index, 646 valobj_sp->GetTypeName().AsCString("<invalid type>"), 647 var_expr_path_strm.GetString().c_str()); 648 } 649 } 650 else if (ClangASTContext::IsArrayType (valobj_sp->GetClangType(), NULL, NULL)) 651 { 652 child_valobj_sp = valobj_sp->GetChildAtIndex (child_index, true); 653 if (!child_valobj_sp) 654 { 655 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 656 error.SetErrorStringWithFormat ("array index %i is not valid for \"(%s) %s\"", 657 child_index, 658 valobj_sp->GetTypeName().AsCString("<invalid type>"), 659 var_expr_path_strm.GetString().c_str()); 660 } 661 } 662 else 663 { 664 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 665 error.SetErrorStringWithFormat ("\"(%s) %s\" is not an array type", 666 valobj_sp->GetTypeName().AsCString("<invalid type>"), 667 var_expr_path_strm.GetString().c_str()); 668 } 669 670 if (!child_valobj_sp) 671 { 672 // Invalid array index... 673 return ValueObjectSP(); 674 } 675 676 // Erase the array member specification '[%i]' where 677 // %i is the array index 678 var_path.erase(0, (end - var_path.c_str()) + 1); 679 separator_idx = var_path.find_first_of(".-["); 680 681 // Break out early from the switch since we were 682 // able to find the child member 683 break; 684 } 685 } 686 return ValueObjectSP(); 687 688 default: 689 // Failure... 690 { 691 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 692 error.SetErrorStringWithFormat ("unexpected char '%c' encountered after \"%s\" in \"%s\"", 693 separator_type, 694 var_expr_path_strm.GetString().c_str(), 695 var_path.c_str()); 696 697 return ValueObjectSP(); 698 } 699 } 700 701 if (child_valobj_sp) 702 valobj_sp = child_valobj_sp; 703 704 if (var_path.empty()) 705 break; 706 707 } 708 if (valobj_sp) 709 { 710 if (deref) 711 { 712 ValueObjectSP deref_valobj_sp (valobj_sp->Dereference(error)); 713 valobj_sp = deref_valobj_sp; 714 } 715 else if (address_of) 716 { 717 ValueObjectSP address_of_valobj_sp (valobj_sp->AddressOf(error)); 718 valobj_sp = address_of_valobj_sp; 719 } 720 } 721 return valobj_sp; 722 } 723 else 724 { 725 error.SetErrorStringWithFormat("no variable named '%s' found in this frame", name_const_string.GetCString()); 726 } 727 } 728 } 729 else 730 { 731 error.SetErrorStringWithFormat("invalid variable path '%s'", var_expr_cstr); 732 } 733 return ValueObjectSP(); 734 } 735 736 bool 737 StackFrame::GetFrameBaseValue (Scalar &frame_base, Error *error_ptr) 738 { 739 if (m_flags.IsClear(GOT_FRAME_BASE)) 740 { 741 if (m_sc.function) 742 { 743 m_frame_base.Clear(); 744 m_frame_base_error.Clear(); 745 746 m_flags.Set(GOT_FRAME_BASE); 747 ExecutionContext exe_ctx (&m_thread.GetProcess(), &m_thread, this); 748 Value expr_value; 749 addr_t loclist_base_addr = LLDB_INVALID_ADDRESS; 750 if (m_sc.function->GetFrameBaseExpression().IsLocationList()) 751 loclist_base_addr = m_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (&m_thread.GetProcess().GetTarget()); 752 753 if (m_sc.function->GetFrameBaseExpression().Evaluate(&exe_ctx, NULL, NULL, NULL, NULL, loclist_base_addr, NULL, expr_value, &m_frame_base_error) == false) 754 { 755 // We should really have an error if evaluate returns, but in case 756 // we don't, lets set the error to something at least. 757 if (m_frame_base_error.Success()) 758 m_frame_base_error.SetErrorString("Evaluation of the frame base expression failed."); 759 } 760 else 761 { 762 m_frame_base = expr_value.ResolveValue(&exe_ctx, NULL); 763 } 764 } 765 else 766 { 767 m_frame_base_error.SetErrorString ("No function in symbol context."); 768 } 769 } 770 771 if (m_frame_base_error.Success()) 772 frame_base = m_frame_base; 773 774 if (error_ptr) 775 *error_ptr = m_frame_base_error; 776 return m_frame_base_error.Success(); 777 } 778 779 RegisterContextSP 780 StackFrame::GetRegisterContext () 781 { 782 if (!m_reg_context_sp) 783 m_reg_context_sp = m_thread.CreateRegisterContextForFrame (this); 784 return m_reg_context_sp; 785 } 786 787 bool 788 StackFrame::HasDebugInformation () 789 { 790 GetSymbolContext (eSymbolContextLineEntry); 791 return m_sc.line_entry.IsValid(); 792 } 793 794 795 ValueObjectSP 796 StackFrame::GetValueObjectForFrameVariable (const VariableSP &variable_sp) 797 { 798 ValueObjectSP valobj_sp; 799 VariableList *var_list = GetVariableList (true); 800 if (var_list) 801 { 802 // Make sure the variable is a frame variable 803 const uint32_t var_idx = var_list->FindIndexForVariable (variable_sp.get()); 804 const uint32_t num_variables = var_list->GetSize(); 805 if (var_idx < num_variables) 806 { 807 valobj_sp = m_variable_list_value_objects.GetValueObjectAtIndex (var_idx); 808 if (valobj_sp.get() == NULL) 809 { 810 if (m_variable_list_value_objects.GetSize() < num_variables) 811 m_variable_list_value_objects.Resize(num_variables); 812 valobj_sp.reset (new ValueObjectVariable (variable_sp)); 813 m_variable_list_value_objects.SetValueObjectAtIndex (var_idx, valobj_sp); 814 } 815 } 816 } 817 return valobj_sp; 818 } 819 820 ValueObjectSP 821 StackFrame::TrackGlobalVariable (const VariableSP &variable_sp) 822 { 823 // Check to make sure we aren't already tracking this variable? 824 ValueObjectSP valobj_sp (GetValueObjectForFrameVariable (variable_sp)); 825 if (!valobj_sp) 826 { 827 // We aren't already tracking this global 828 VariableList *var_list = GetVariableList (true); 829 // If this frame has no variables, create a new list 830 if (var_list == NULL) 831 m_variable_list_sp.reset (new VariableList()); 832 833 // Add the global/static variable to this frame 834 m_variable_list_sp->AddVariable (variable_sp); 835 836 // Now make a value object for it so we can track its changes 837 valobj_sp = GetValueObjectForFrameVariable (variable_sp); 838 } 839 return valobj_sp; 840 } 841 842 bool 843 StackFrame::IsInlined () 844 { 845 if (m_sc.block == NULL) 846 GetSymbolContext (eSymbolContextBlock); 847 if (m_sc.block) 848 return m_sc.block->GetContainingInlinedBlock() != NULL; 849 return false; 850 } 851 852 Target * 853 StackFrame::CalculateTarget () 854 { 855 return m_thread.CalculateTarget(); 856 } 857 858 Process * 859 StackFrame::CalculateProcess () 860 { 861 return m_thread.CalculateProcess(); 862 } 863 864 Thread * 865 StackFrame::CalculateThread () 866 { 867 return &m_thread; 868 } 869 870 StackFrame * 871 StackFrame::CalculateStackFrame () 872 { 873 return this; 874 } 875 876 877 void 878 StackFrame::CalculateExecutionContext (ExecutionContext &exe_ctx) 879 { 880 m_thread.CalculateExecutionContext (exe_ctx); 881 exe_ctx.frame = this; 882 } 883 884 void 885 StackFrame::DumpUsingSettingsFormat (Stream *strm) 886 { 887 if (strm == NULL) 888 return; 889 890 GetSymbolContext(eSymbolContextEverything); 891 ExecutionContext exe_ctx; 892 CalculateExecutionContext(exe_ctx); 893 const char *end = NULL; 894 StreamString s; 895 const char *frame_format = m_thread.GetProcess().GetTarget().GetDebugger().GetFrameFormat(); 896 if (frame_format && Debugger::FormatPrompt (frame_format, &m_sc, &exe_ctx, NULL, s, &end)) 897 { 898 strm->Write(s.GetData(), s.GetSize()); 899 } 900 else 901 { 902 Dump (strm, true, false); 903 strm->EOL(); 904 } 905 } 906 907 void 908 StackFrame::Dump (Stream *strm, bool show_frame_index, bool show_fullpaths) 909 { 910 if (strm == NULL) 911 return; 912 913 if (show_frame_index) 914 strm->Printf("frame #%u: ", m_frame_index); 915 strm->Printf("0x%0*llx ", m_thread.GetProcess().GetTarget().GetArchitecture().GetAddressByteSize() * 2, GetFrameCodeAddress().GetLoadAddress(&m_thread.GetProcess().GetTarget())); 916 GetSymbolContext(eSymbolContextEverything); 917 const bool show_module = true; 918 const bool show_inline = true; 919 m_sc.DumpStopContext(strm, &m_thread.GetProcess(), GetFrameCodeAddress(), show_fullpaths, show_module, show_inline); 920 } 921 922 void 923 StackFrame::UpdateCurrentFrameFromPreviousFrame (StackFrame &prev_frame) 924 { 925 assert (GetStackID() == prev_frame.GetStackID()); // TODO: remove this after some testing 926 m_variable_list_sp = prev_frame.m_variable_list_sp; 927 m_variable_list_value_objects.Swap (prev_frame.m_variable_list_value_objects); 928 if (!m_disassembly.GetString().empty()) 929 m_disassembly.GetString().swap (m_disassembly.GetString()); 930 } 931 932 933 void 934 StackFrame::UpdatePreviousFrameFromCurrentFrame (StackFrame &curr_frame) 935 { 936 assert (GetStackID() == curr_frame.GetStackID()); // TODO: remove this after some testing 937 m_id.SetPC (curr_frame.m_id.GetPC()); // Update the Stack ID PC value 938 assert (&m_thread == &curr_frame.m_thread); 939 m_frame_index = curr_frame.m_frame_index; 940 m_concrete_frame_index = curr_frame.m_concrete_frame_index; 941 m_reg_context_sp = curr_frame.m_reg_context_sp; 942 m_frame_code_addr = curr_frame.m_frame_code_addr; 943 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()); 944 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()); 945 assert (m_sc.comp_unit == NULL || curr_frame.m_sc.comp_unit == NULL || m_sc.comp_unit == curr_frame.m_sc.comp_unit); 946 assert (m_sc.function == NULL || curr_frame.m_sc.function == NULL || m_sc.function == curr_frame.m_sc.function); 947 m_sc = curr_frame.m_sc; 948 m_flags.Clear(GOT_FRAME_BASE | eSymbolContextEverything); 949 m_flags.Set (m_sc.GetResolvedMask()); 950 m_frame_base.Clear(); 951 m_frame_base_error.Clear(); 952 } 953 954 955 bool 956 StackFrame::HasCachedData () const 957 { 958 if (m_variable_list_sp.get()) 959 return true; 960 if (m_variable_list_value_objects.GetSize() > 0) 961 return true; 962 if (!m_disassembly.GetString().empty()) 963 return true; 964 return false; 965 } 966 967 lldb::StackFrameSP 968 StackFrame::GetSP () 969 { 970 return m_thread.GetStackFrameSPForStackFramePtr (this); 971 } 972