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 NULL, 262 exe_ctx, 263 0, 264 0, 265 false, 266 false, 267 m_disassembly); 268 if (m_disassembly.GetSize() == 0) 269 return NULL; 270 } 271 return m_disassembly.GetData(); 272 } 273 274 Block * 275 StackFrame::GetFrameBlock () 276 { 277 if (m_sc.block == NULL && m_flags.IsClear (eSymbolContextBlock)) 278 GetSymbolContext (eSymbolContextBlock); 279 280 if (m_sc.block) 281 { 282 Block *inline_block = m_sc.block->GetContainingInlinedBlock(); 283 if (inline_block) 284 { 285 // Use the block with the inlined function info 286 // as the frame block we want this frame to have only the variables 287 // for the inlined function and its non-inlined block child blocks. 288 return inline_block; 289 } 290 else 291 { 292 // This block is not contained withing any inlined function blocks 293 // with so we want to use the top most function block. 294 return &m_sc.function->GetBlock (false); 295 } 296 } 297 return NULL; 298 } 299 300 //---------------------------------------------------------------------- 301 // Get the symbol context if we already haven't done so by resolving the 302 // PC address as much as possible. This way when we pass around a 303 // StackFrame object, everyone will have as much information as 304 // possible and no one will ever have to look things up manually. 305 //---------------------------------------------------------------------- 306 const SymbolContext& 307 StackFrame::GetSymbolContext (uint32_t resolve_scope) 308 { 309 // Copy our internal symbol context into "sc". 310 if ((m_flags.Get() & resolve_scope) != resolve_scope) 311 { 312 // Resolve our PC to section offset if we haven't alreday done so 313 // and if we don't have a module. The resolved address section will 314 // contain the module to which it belongs 315 if (!m_sc.module_sp && m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR)) 316 GetFrameCodeAddress(); 317 318 // If this is not frame zero, then we need to subtract 1 from the PC 319 // value when doing address lookups since the PC will be on the 320 // instruction following the function call instruction... 321 322 Address lookup_addr(GetFrameCodeAddress()); 323 if (m_frame_index > 0 && lookup_addr.IsValid()) 324 { 325 addr_t offset = lookup_addr.GetOffset(); 326 if (offset > 0) 327 lookup_addr.SetOffset(offset - 1); 328 } 329 330 331 uint32_t resolved = 0; 332 if (m_sc.module_sp) 333 { 334 // We have something in our stack frame symbol context, lets check 335 // if we haven't already tried to lookup one of those things. If we 336 // haven't then we will do the query. 337 338 uint32_t actual_resolve_scope = 0; 339 340 if (resolve_scope & eSymbolContextCompUnit) 341 { 342 if (m_flags.IsClear (eSymbolContextCompUnit)) 343 { 344 if (m_sc.comp_unit) 345 resolved |= eSymbolContextCompUnit; 346 else 347 actual_resolve_scope |= eSymbolContextCompUnit; 348 } 349 } 350 351 if (resolve_scope & eSymbolContextFunction) 352 { 353 if (m_flags.IsClear (eSymbolContextFunction)) 354 { 355 if (m_sc.function) 356 resolved |= eSymbolContextFunction; 357 else 358 actual_resolve_scope |= eSymbolContextFunction; 359 } 360 } 361 362 if (resolve_scope & eSymbolContextBlock) 363 { 364 if (m_flags.IsClear (eSymbolContextBlock)) 365 { 366 if (m_sc.block) 367 resolved |= eSymbolContextBlock; 368 else 369 actual_resolve_scope |= eSymbolContextBlock; 370 } 371 } 372 373 if (resolve_scope & eSymbolContextSymbol) 374 { 375 if (m_flags.IsClear (eSymbolContextSymbol)) 376 { 377 if (m_sc.symbol) 378 resolved |= eSymbolContextSymbol; 379 else 380 actual_resolve_scope |= eSymbolContextSymbol; 381 } 382 } 383 384 if (resolve_scope & eSymbolContextLineEntry) 385 { 386 if (m_flags.IsClear (eSymbolContextLineEntry)) 387 { 388 if (m_sc.line_entry.IsValid()) 389 resolved |= eSymbolContextLineEntry; 390 else 391 actual_resolve_scope |= eSymbolContextLineEntry; 392 } 393 } 394 395 if (actual_resolve_scope) 396 { 397 // We might be resolving less information than what is already 398 // in our current symbol context so resolve into a temporary 399 // symbol context "sc" so we don't clear out data we have 400 // already found in "m_sc" 401 SymbolContext sc; 402 // Set flags that indicate what we have tried to resolve 403 resolved |= m_sc.module_sp->ResolveSymbolContextForAddress (lookup_addr, actual_resolve_scope, sc); 404 // Only replace what we didn't already have as we may have 405 // information for an inlined function scope that won't match 406 // what a standard lookup by address would match 407 if ((resolved & eSymbolContextCompUnit) && m_sc.comp_unit == NULL) 408 m_sc.comp_unit = sc.comp_unit; 409 if ((resolved & eSymbolContextFunction) && m_sc.function == NULL) 410 m_sc.function = sc.function; 411 if ((resolved & eSymbolContextBlock) && m_sc.block == NULL) 412 m_sc.block = sc.block; 413 if ((resolved & eSymbolContextSymbol) && m_sc.symbol == NULL) 414 m_sc.symbol = sc.symbol; 415 if ((resolved & eSymbolContextLineEntry) && !m_sc.line_entry.IsValid()) 416 m_sc.line_entry = sc.line_entry; 417 418 } 419 } 420 else 421 { 422 // If we don't have a module, then we can't have the compile unit, 423 // function, block, line entry or symbol, so we can safely call 424 // ResolveSymbolContextForAddress with our symbol context member m_sc. 425 resolved |= m_thread.GetProcess().GetTarget().GetImages().ResolveSymbolContextForAddress (lookup_addr, resolve_scope, m_sc); 426 } 427 428 // If the target was requested add that: 429 if (m_sc.target_sp.get() == NULL) 430 { 431 m_sc.target_sp = CalculateProcess()->GetTarget().GetSP(); 432 if (m_sc.target_sp) 433 resolved |= eSymbolContextTarget; 434 } 435 436 // Update our internal flags so we remember what we have tried to locate so 437 // we don't have to keep trying when more calls to this function are made. 438 // We might have dug up more information that was requested (for example 439 // if we were asked to only get the block, we will have gotten the 440 // compile unit, and function) so set any additional bits that we resolved 441 m_flags.Set (resolve_scope | resolved); 442 } 443 444 // Return the symbol context with everything that was possible to resolve 445 // resolved. 446 return m_sc; 447 } 448 449 450 VariableList * 451 StackFrame::GetVariableList (bool get_file_globals) 452 { 453 if (m_flags.IsClear(RESOLVED_VARIABLES)) 454 { 455 m_flags.Set(RESOLVED_VARIABLES); 456 457 Block *frame_block = GetFrameBlock(); 458 459 if (frame_block) 460 { 461 const bool get_child_variables = true; 462 const bool can_create = true; 463 m_variable_list_sp = frame_block->GetVariableList (get_child_variables, can_create); 464 } 465 } 466 467 if (m_flags.IsClear(RESOLVED_GLOBAL_VARIABLES) && 468 get_file_globals) 469 { 470 m_flags.Set(RESOLVED_GLOBAL_VARIABLES); 471 472 if (m_flags.IsClear (eSymbolContextCompUnit)) 473 GetSymbolContext (eSymbolContextCompUnit); 474 475 if (m_sc.comp_unit) 476 { 477 VariableListSP global_variable_list_sp (m_sc.comp_unit->GetVariableList(true)); 478 if (m_variable_list_sp) 479 m_variable_list_sp->AddVariables (global_variable_list_sp.get()); 480 else 481 m_variable_list_sp = global_variable_list_sp; 482 } 483 } 484 485 return m_variable_list_sp.get(); 486 } 487 488 ValueObjectSP 489 StackFrame::GetValueForVariableExpressionPath (const char *var_expr_cstr, uint32_t options, Error &error) 490 { 491 492 if (var_expr_cstr && var_expr_cstr[0]) 493 { 494 const bool check_ptr_vs_member = (options & eExpressionPathOptionCheckPtrVsMember) != 0; 495 const bool no_fragile_ivar = (options & eExpressionPathOptionsNoFragileObjcIvar) != 0; 496 const bool dynamic_value = (options & eExpressionPathOptionsDynamicValue) != 0; 497 error.Clear(); 498 bool deref = false; 499 bool address_of = false; 500 ValueObjectSP valobj_sp; 501 const bool get_file_globals = true; 502 VariableList *variable_list = GetVariableList (get_file_globals); 503 504 if (variable_list) 505 { 506 // If first character is a '*', then show pointer contents 507 const char *var_expr = var_expr_cstr; 508 if (var_expr[0] == '*') 509 { 510 deref = true; 511 var_expr++; // Skip the '*' 512 } 513 else if (var_expr[0] == '&') 514 { 515 address_of = true; 516 var_expr++; // Skip the '&' 517 } 518 519 std::string var_path (var_expr); 520 size_t separator_idx = var_path.find_first_of(".-[=+~|&^%#@!/?,<>{}"); 521 StreamString var_expr_path_strm; 522 523 ConstString name_const_string; 524 if (separator_idx == std::string::npos) 525 name_const_string.SetCString (var_path.c_str()); 526 else 527 name_const_string.SetCStringWithLength (var_path.c_str(), separator_idx); 528 529 VariableSP var_sp (variable_list->FindVariable(name_const_string)); 530 if (var_sp) 531 { 532 valobj_sp = GetValueObjectForFrameVariable (var_sp, dynamic_value); 533 if (!valobj_sp) 534 return valobj_sp; 535 536 var_path.erase (0, name_const_string.GetLength ()); 537 // We are dumping at least one child 538 while (separator_idx != std::string::npos) 539 { 540 // Calculate the next separator index ahead of time 541 ValueObjectSP child_valobj_sp; 542 const char separator_type = var_path[0]; 543 switch (separator_type) 544 { 545 546 case '-': 547 if (var_path.size() >= 2 && var_path[1] != '>') 548 return ValueObjectSP(); 549 550 if (no_fragile_ivar) 551 { 552 // Make sure we aren't trying to deref an objective 553 // C ivar if this is not allowed 554 const uint32_t pointer_type_flags = ClangASTContext::GetTypeInfo (valobj_sp->GetClangType(), NULL, NULL); 555 if ((pointer_type_flags & ClangASTContext::eTypeIsObjC) && 556 (pointer_type_flags & ClangASTContext::eTypeIsPointer)) 557 { 558 // This was an objective C object pointer and 559 // it was requested we skip any fragile ivars 560 // so return nothing here 561 return ValueObjectSP(); 562 } 563 } 564 var_path.erase (0, 1); // Remove the '-' 565 // Fall through 566 case '.': 567 { 568 const bool expr_is_ptr = var_path[0] == '>'; 569 570 var_path.erase (0, 1); // Remove the '.' or '>' 571 separator_idx = var_path.find_first_of(".-["); 572 ConstString child_name; 573 if (separator_idx == std::string::npos) 574 child_name.SetCString (var_path.c_str()); 575 else 576 child_name.SetCStringWithLength(var_path.c_str(), separator_idx); 577 578 if (check_ptr_vs_member) 579 { 580 // We either have a pointer type and need to verify 581 // valobj_sp is a pointer, or we have a member of a 582 // class/union/struct being accessed with the . syntax 583 // and need to verify we don't have a pointer. 584 const bool actual_is_ptr = valobj_sp->IsPointerType (); 585 586 if (actual_is_ptr != expr_is_ptr) 587 { 588 // Incorrect use of "." with a pointer, or "->" with 589 // a class/union/struct instance or reference. 590 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 591 if (actual_is_ptr) 592 error.SetErrorStringWithFormat ("\"%s\" is 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 else 598 error.SetErrorStringWithFormat ("\"%s\" is not a pointer and -> was used to attempt to access \"%s\". Did you mean \"%s.%s\"?", 599 var_expr_path_strm.GetString().c_str(), 600 child_name.GetCString(), 601 var_expr_path_strm.GetString().c_str(), 602 var_path.c_str()); 603 return ValueObjectSP(); 604 } 605 } 606 child_valobj_sp = valobj_sp->GetChildMemberWithName (child_name, true); 607 if (!child_valobj_sp) 608 { 609 // No child member with name "child_name" 610 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 611 if (child_name) 612 { 613 error.SetErrorStringWithFormat ("\"%s\" is not a member of \"(%s) %s\"", 614 child_name.GetCString(), 615 valobj_sp->GetTypeName().AsCString("<invalid type>"), 616 var_expr_path_strm.GetString().c_str()); 617 } 618 else 619 { 620 error.SetErrorStringWithFormat ("incomplete expression path after \"%s\" in \"%s\"", 621 var_expr_path_strm.GetString().c_str(), 622 var_expr_cstr); 623 } 624 625 return ValueObjectSP(); 626 } 627 // Remove the child name from the path 628 var_path.erase(0, child_name.GetLength()); 629 if (dynamic_value) 630 { 631 ValueObjectSP dynamic_value_sp(child_valobj_sp->GetDynamicValue(true)); 632 if (dynamic_value_sp) 633 child_valobj_sp = dynamic_value_sp; 634 } 635 } 636 break; 637 638 case '[': 639 // Array member access, or treating pointer as an array 640 if (var_path.size() > 2) // Need at least two brackets and a number 641 { 642 char *end = NULL; 643 long child_index = ::strtol (&var_path[1], &end, 0); 644 if (end && *end == ']') 645 { 646 647 if (valobj_sp->IsPointerType ()) 648 { 649 child_valobj_sp = valobj_sp->GetSyntheticArrayMemberFromPointer (child_index, true); 650 if (!child_valobj_sp) 651 { 652 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 653 error.SetErrorStringWithFormat ("failed to use pointer as array for index %i for \"(%s) %s\"", 654 child_index, 655 valobj_sp->GetTypeName().AsCString("<invalid type>"), 656 var_expr_path_strm.GetString().c_str()); 657 } 658 } 659 else if (ClangASTContext::IsArrayType (valobj_sp->GetClangType(), NULL, NULL)) 660 { 661 // Pass false to dynamic_value here so we can tell the difference between 662 // no dynamic value and no member of this type... 663 child_valobj_sp = valobj_sp->GetChildAtIndex (child_index, true); 664 if (!child_valobj_sp) 665 { 666 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 667 error.SetErrorStringWithFormat ("array index %i is not valid for \"(%s) %s\"", 668 child_index, 669 valobj_sp->GetTypeName().AsCString("<invalid type>"), 670 var_expr_path_strm.GetString().c_str()); 671 } 672 } 673 else 674 { 675 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 676 error.SetErrorStringWithFormat ("\"(%s) %s\" is not an array type", 677 valobj_sp->GetTypeName().AsCString("<invalid type>"), 678 var_expr_path_strm.GetString().c_str()); 679 } 680 681 if (!child_valobj_sp) 682 { 683 // Invalid array index... 684 return ValueObjectSP(); 685 } 686 687 // Erase the array member specification '[%i]' where 688 // %i is the array index 689 var_path.erase(0, (end - var_path.c_str()) + 1); 690 separator_idx = var_path.find_first_of(".-["); 691 if (dynamic_value) 692 { 693 ValueObjectSP dynamic_value_sp(child_valobj_sp->GetDynamicValue(true)); 694 if (dynamic_value_sp) 695 child_valobj_sp = dynamic_value_sp; 696 } 697 // Break out early from the switch since we were 698 // able to find the child member 699 break; 700 } 701 } 702 return ValueObjectSP(); 703 704 default: 705 // Failure... 706 { 707 valobj_sp->GetExpressionPath (var_expr_path_strm, false); 708 error.SetErrorStringWithFormat ("unexpected char '%c' encountered after \"%s\" in \"%s\"", 709 separator_type, 710 var_expr_path_strm.GetString().c_str(), 711 var_path.c_str()); 712 713 return ValueObjectSP(); 714 } 715 } 716 717 if (child_valobj_sp) 718 valobj_sp = child_valobj_sp; 719 720 if (var_path.empty()) 721 break; 722 723 } 724 if (valobj_sp) 725 { 726 if (deref) 727 { 728 ValueObjectSP deref_valobj_sp (valobj_sp->Dereference(error)); 729 valobj_sp = deref_valobj_sp; 730 } 731 else if (address_of) 732 { 733 ValueObjectSP address_of_valobj_sp (valobj_sp->AddressOf(error)); 734 valobj_sp = address_of_valobj_sp; 735 } 736 } 737 return valobj_sp; 738 } 739 else 740 { 741 error.SetErrorStringWithFormat("no variable named '%s' found in this frame", name_const_string.GetCString()); 742 } 743 } 744 } 745 else 746 { 747 error.SetErrorStringWithFormat("invalid variable path '%s'", var_expr_cstr); 748 } 749 return ValueObjectSP(); 750 } 751 752 bool 753 StackFrame::GetFrameBaseValue (Scalar &frame_base, Error *error_ptr) 754 { 755 if (m_flags.IsClear(GOT_FRAME_BASE)) 756 { 757 if (m_sc.function) 758 { 759 m_frame_base.Clear(); 760 m_frame_base_error.Clear(); 761 762 m_flags.Set(GOT_FRAME_BASE); 763 ExecutionContext exe_ctx (&m_thread.GetProcess(), &m_thread, this); 764 Value expr_value; 765 addr_t loclist_base_addr = LLDB_INVALID_ADDRESS; 766 if (m_sc.function->GetFrameBaseExpression().IsLocationList()) 767 loclist_base_addr = m_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (&m_thread.GetProcess().GetTarget()); 768 769 if (m_sc.function->GetFrameBaseExpression().Evaluate(&exe_ctx, NULL, NULL, NULL, NULL, loclist_base_addr, NULL, expr_value, &m_frame_base_error) == false) 770 { 771 // We should really have an error if evaluate returns, but in case 772 // we don't, lets set the error to something at least. 773 if (m_frame_base_error.Success()) 774 m_frame_base_error.SetErrorString("Evaluation of the frame base expression failed."); 775 } 776 else 777 { 778 m_frame_base = expr_value.ResolveValue(&exe_ctx, NULL); 779 } 780 } 781 else 782 { 783 m_frame_base_error.SetErrorString ("No function in symbol context."); 784 } 785 } 786 787 if (m_frame_base_error.Success()) 788 frame_base = m_frame_base; 789 790 if (error_ptr) 791 *error_ptr = m_frame_base_error; 792 return m_frame_base_error.Success(); 793 } 794 795 RegisterContextSP 796 StackFrame::GetRegisterContext () 797 { 798 if (!m_reg_context_sp) 799 m_reg_context_sp = m_thread.CreateRegisterContextForFrame (this); 800 return m_reg_context_sp; 801 } 802 803 bool 804 StackFrame::HasDebugInformation () 805 { 806 GetSymbolContext (eSymbolContextLineEntry); 807 return m_sc.line_entry.IsValid(); 808 } 809 810 811 ValueObjectSP 812 StackFrame::GetValueObjectForFrameVariable (const VariableSP &variable_sp, bool use_dynamic) 813 { 814 ValueObjectSP valobj_sp; 815 VariableList *var_list = GetVariableList (true); 816 if (var_list) 817 { 818 // Make sure the variable is a frame variable 819 const uint32_t var_idx = var_list->FindIndexForVariable (variable_sp.get()); 820 const uint32_t num_variables = var_list->GetSize(); 821 if (var_idx < num_variables) 822 { 823 valobj_sp = m_variable_list_value_objects.GetValueObjectAtIndex (var_idx); 824 if (valobj_sp.get() == NULL) 825 { 826 if (m_variable_list_value_objects.GetSize() < num_variables) 827 m_variable_list_value_objects.Resize(num_variables); 828 valobj_sp = ValueObjectVariable::Create (this, variable_sp); 829 m_variable_list_value_objects.SetValueObjectAtIndex (var_idx, valobj_sp); 830 } 831 } 832 } 833 if (use_dynamic && valobj_sp) 834 { 835 ValueObjectSP dynamic_sp = valobj_sp->GetDynamicValue (true); 836 if (dynamic_sp) 837 return dynamic_sp; 838 } 839 return valobj_sp; 840 } 841 842 ValueObjectSP 843 StackFrame::TrackGlobalVariable (const VariableSP &variable_sp, bool use_dynamic) 844 { 845 // Check to make sure we aren't already tracking this variable? 846 ValueObjectSP valobj_sp (GetValueObjectForFrameVariable (variable_sp, use_dynamic)); 847 if (!valobj_sp) 848 { 849 // We aren't already tracking this global 850 VariableList *var_list = GetVariableList (true); 851 // If this frame has no variables, create a new list 852 if (var_list == NULL) 853 m_variable_list_sp.reset (new VariableList()); 854 855 // Add the global/static variable to this frame 856 m_variable_list_sp->AddVariable (variable_sp); 857 858 // Now make a value object for it so we can track its changes 859 valobj_sp = GetValueObjectForFrameVariable (variable_sp, use_dynamic); 860 } 861 return valobj_sp; 862 } 863 864 bool 865 StackFrame::IsInlined () 866 { 867 if (m_sc.block == NULL) 868 GetSymbolContext (eSymbolContextBlock); 869 if (m_sc.block) 870 return m_sc.block->GetContainingInlinedBlock() != NULL; 871 return false; 872 } 873 874 Target * 875 StackFrame::CalculateTarget () 876 { 877 return m_thread.CalculateTarget(); 878 } 879 880 Process * 881 StackFrame::CalculateProcess () 882 { 883 return m_thread.CalculateProcess(); 884 } 885 886 Thread * 887 StackFrame::CalculateThread () 888 { 889 return &m_thread; 890 } 891 892 StackFrame * 893 StackFrame::CalculateStackFrame () 894 { 895 return this; 896 } 897 898 899 void 900 StackFrame::CalculateExecutionContext (ExecutionContext &exe_ctx) 901 { 902 m_thread.CalculateExecutionContext (exe_ctx); 903 exe_ctx.frame = this; 904 } 905 906 void 907 StackFrame::DumpUsingSettingsFormat (Stream *strm) 908 { 909 if (strm == NULL) 910 return; 911 912 GetSymbolContext(eSymbolContextEverything); 913 ExecutionContext exe_ctx; 914 CalculateExecutionContext(exe_ctx); 915 const char *end = NULL; 916 StreamString s; 917 const char *frame_format = m_thread.GetProcess().GetTarget().GetDebugger().GetFrameFormat(); 918 if (frame_format && Debugger::FormatPrompt (frame_format, &m_sc, &exe_ctx, NULL, s, &end)) 919 { 920 strm->Write(s.GetData(), s.GetSize()); 921 } 922 else 923 { 924 Dump (strm, true, false); 925 strm->EOL(); 926 } 927 } 928 929 void 930 StackFrame::Dump (Stream *strm, bool show_frame_index, bool show_fullpaths) 931 { 932 if (strm == NULL) 933 return; 934 935 if (show_frame_index) 936 strm->Printf("frame #%u: ", m_frame_index); 937 strm->Printf("0x%0*llx ", m_thread.GetProcess().GetTarget().GetArchitecture().GetAddressByteSize() * 2, GetFrameCodeAddress().GetLoadAddress(&m_thread.GetProcess().GetTarget())); 938 GetSymbolContext(eSymbolContextEverything); 939 const bool show_module = true; 940 const bool show_inline = true; 941 m_sc.DumpStopContext(strm, &m_thread.GetProcess(), GetFrameCodeAddress(), show_fullpaths, show_module, show_inline); 942 } 943 944 void 945 StackFrame::UpdateCurrentFrameFromPreviousFrame (StackFrame &prev_frame) 946 { 947 assert (GetStackID() == prev_frame.GetStackID()); // TODO: remove this after some testing 948 m_variable_list_sp = prev_frame.m_variable_list_sp; 949 m_variable_list_value_objects.Swap (prev_frame.m_variable_list_value_objects); 950 if (!m_disassembly.GetString().empty()) 951 m_disassembly.GetString().swap (m_disassembly.GetString()); 952 } 953 954 955 void 956 StackFrame::UpdatePreviousFrameFromCurrentFrame (StackFrame &curr_frame) 957 { 958 assert (GetStackID() == curr_frame.GetStackID()); // TODO: remove this after some testing 959 m_id.SetPC (curr_frame.m_id.GetPC()); // Update the Stack ID PC value 960 assert (&m_thread == &curr_frame.m_thread); 961 m_frame_index = curr_frame.m_frame_index; 962 m_concrete_frame_index = curr_frame.m_concrete_frame_index; 963 m_reg_context_sp = curr_frame.m_reg_context_sp; 964 m_frame_code_addr = curr_frame.m_frame_code_addr; 965 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()); 966 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()); 967 assert (m_sc.comp_unit == NULL || curr_frame.m_sc.comp_unit == NULL || m_sc.comp_unit == curr_frame.m_sc.comp_unit); 968 assert (m_sc.function == NULL || curr_frame.m_sc.function == NULL || m_sc.function == curr_frame.m_sc.function); 969 m_sc = curr_frame.m_sc; 970 m_flags.Clear(GOT_FRAME_BASE | eSymbolContextEverything); 971 m_flags.Set (m_sc.GetResolvedMask()); 972 m_frame_base.Clear(); 973 m_frame_base_error.Clear(); 974 } 975 976 977 bool 978 StackFrame::HasCachedData () const 979 { 980 if (m_variable_list_sp.get()) 981 return true; 982 if (m_variable_list_value_objects.GetSize() > 0) 983 return true; 984 if (!m_disassembly.GetString().empty()) 985 return true; 986 return false; 987 } 988 989 lldb::StackFrameSP 990 StackFrame::GetSP () 991 { 992 return m_thread.GetStackFrameSPForStackFramePtr (this); 993 } 994 995 996 997 bool 998 StackFrame::GetStatus (Stream& strm, 999 bool show_frame_info, 1000 bool show_source, 1001 uint32_t source_lines_before, 1002 uint32_t source_lines_after) 1003 { 1004 if (show_frame_info) 1005 { 1006 strm.Indent(); 1007 DumpUsingSettingsFormat (&strm); 1008 } 1009 1010 if (show_source) 1011 { 1012 GetSymbolContext(eSymbolContextCompUnit | eSymbolContextLineEntry); 1013 1014 if (m_sc.comp_unit && m_sc.line_entry.IsValid()) 1015 { 1016 Target &target = GetThread().GetProcess().GetTarget(); 1017 target.GetDebugger().GetSourceManager().DisplaySourceLinesWithLineNumbers ( 1018 &target, 1019 m_sc.line_entry.file, 1020 m_sc.line_entry.line, 1021 3, 1022 3, 1023 "->", 1024 &strm); 1025 1026 } 1027 } 1028 return true; 1029 } 1030 1031