C++ Symbol::GetName方法代码示例

Symbol * DACGenerator::AddSymbol(Symbol * pSymbol)
{
	if (pSymbol == 0) {
		Error("AddSymbol: invalid symbol");
		return 0;
	}

	// check if symbol already exists
	Symbol* result = mSymbolTable.Find(pSymbol->GetName());

	if (result != 0)
	{
		if (result->GetSymbolType() != eConst)
		{
			std::wstring wname = std::wstring(result->GetName());
			std::string name = std::string(wname.begin(), wname.end());
			Error("Symbol " + name + " already defined");
		}
		delete pSymbol; pSymbol = result;
	}
	else
	{
		result = mSymbolTable.Add(pSymbol);
	}

	return result;
}

ThreadPlanSP
DynamicLoaderPOSIXDYLD::GetStepThroughTrampolinePlan(Thread &thread, bool stop)
{
    ThreadPlanSP thread_plan_sp;

    StackFrame *frame = thread.GetStackFrameAtIndex(0).get();
    const SymbolContext &context = frame->GetSymbolContext(eSymbolContextSymbol);
    Symbol *sym = context.symbol;

    if (sym == NULL || !sym->IsTrampoline())
        return thread_plan_sp;

    ConstString sym_name = sym->GetName();
    if (!sym_name)
        return thread_plan_sp;

    SymbolContextList target_symbols;
    Target &target = thread.GetProcess()->GetTarget();
    const ModuleList &images = target.GetImages();

    images.FindSymbolsWithNameAndType(sym_name, eSymbolTypeCode, target_symbols);
    size_t num_targets = target_symbols.GetSize();
    if (!num_targets)
        return thread_plan_sp;

    typedef std::vector<lldb::addr_t> AddressVector;
    AddressVector addrs;
    for (size_t i = 0; i < num_targets; ++i)
    {
        SymbolContext context;
        AddressRange range;
        if (target_symbols.GetContextAtIndex(i, context))
        {
            context.GetAddressRange(eSymbolContextEverything, 0, false, range);
            lldb::addr_t addr = range.GetBaseAddress().GetLoadAddress(&target);
            if (addr != LLDB_INVALID_ADDRESS)
                addrs.push_back(addr);
        }
    }

    if (addrs.size() > 0) 
    {
        AddressVector::iterator start = addrs.begin();
        AddressVector::iterator end = addrs.end();

        std::sort(start, end);
        addrs.erase(std::unique(start, end), end);
        thread_plan_sp.reset(new ThreadPlanRunToAddress(thread, addrs, stop));
    }

    return thread_plan_sp;
}

string SymbolTable::GetAddress(string name, string off) {
    Symbol* sym = LookUp(name);
    if (sym) {
        if (sym->GetType() == SYMBOL_PARAM) {
            if (sym->GetLoc() < 0) {
                sym->SetLoc(next_temp);
                return "Param";
            } else {
                stringstream ss;
                if (off == "") {
                    ss<<"local["<<sym->GetLoc()<<"]";
                } else {
                    ss<<"local["<<sym->GetLoc()<<"+"<<off<<"]";
                }
                return ss.str();
            }
        } else if (sym->GetType() == SYMBOL_FUNC) {
            return sym->GetName();
        } else if (sym->GetType() == SYMBOL_GLOBAL) {
            stringstream ss;
            if (off == "") {
                ss<<"global["<<sym->GetLoc()<<"]";
            } else {
                ss<<"global["<<sym->GetLoc()<<"+"<<off<<"]";
            }
            return ss.str();
        } else {
            stringstream ss;
            if (off == "") {
                ss<<"local["<<sym->GetLoc()<<"]";
            } else {
                ss<<"local["<<sym->GetLoc()<<"+"<<off<<"]";
            }
            return ss.str();
        }
    } else {
        return "";
    }
}

 bool operator==(const std::string &lhs, const Symbol &rhs)
 {
   return rhs.GetName() == lhs;
 }

//.........这里部分代码省略.........
      if (fallback_style != DumpStyleInvalid)
        return Dump(s, exe_scope, fallback_style, DumpStyleInvalid, addr_size);
      return false;
    }
    s->Address(load_addr, addr_size);
  } break;

  case DumpStyleResolvedDescription:
  case DumpStyleResolvedDescriptionNoModule:
  case DumpStyleResolvedDescriptionNoFunctionArguments:
  case DumpStyleNoFunctionName:
    if (IsSectionOffset()) {
      uint32_t pointer_size = 4;
      ModuleSP module_sp(GetModule());
      if (target)
        pointer_size = target->GetArchitecture().GetAddressByteSize();
      else if (module_sp)
        pointer_size = module_sp->GetArchitecture().GetAddressByteSize();

      bool showed_info = false;
      if (section_sp) {
        SectionType sect_type = section_sp->GetType();
        switch (sect_type) {
        case eSectionTypeData:
          if (module_sp) {
            SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
            if (sym_vendor) {
              Symtab *symtab = sym_vendor->GetSymtab();
              if (symtab) {
                const addr_t file_Addr = GetFileAddress();
                Symbol *symbol =
                    symtab->FindSymbolContainingFileAddress(file_Addr);
                if (symbol) {
                  const char *symbol_name = symbol->GetName().AsCString();
                  if (symbol_name) {
                    s->PutCString(symbol_name);
                    addr_t delta =
                        file_Addr - symbol->GetAddressRef().GetFileAddress();
                    if (delta)
                      s->Printf(" + %" PRIu64, delta);
                    showed_info = true;
                  }
                }
              }
            }
          }
          break;

        case eSectionTypeDataCString:
          // Read the C string from memory and display it
          showed_info = true;
          ReadCStringFromMemory(exe_scope, *this, s);
          break;

        case eSectionTypeDataCStringPointers:
          if (ReadAddress(exe_scope, *this, pointer_size, so_addr)) {
#if VERBOSE_OUTPUT
            s->PutCString("(char *)");
            so_addr.Dump(s, exe_scope, DumpStyleLoadAddress,
                         DumpStyleFileAddress);
            s->PutCString(": ");
#endif
            showed_info = true;
            ReadCStringFromMemory(exe_scope, so_addr, s);
          }
          break;

//.........这里部分代码省略.........

  if (status.Fail())
    return optional_info;

  lldb::addr_t address_after_vtable = member__f_pointer_value + address_size;
  // As commened above we may not have a function pointer but if we do we will
  // need it.
  lldb::addr_t possible_function_address =
      process->ReadPointerFromMemory(address_after_vtable, status);

  if (status.Fail())
    return optional_info;

  Target &target = process->GetTarget();

  if (target.GetSectionLoadList().IsEmpty())
    return optional_info;

  Address vtable_addr_resolved;
  SymbolContext sc;
  Symbol *symbol;

  if (!target.GetSectionLoadList().ResolveLoadAddress(vtable_address,
                                                      vtable_addr_resolved))
    return optional_info;

  target.GetImages().ResolveSymbolContextForAddress(
      vtable_addr_resolved, eSymbolContextEverything, sc);
  symbol = sc.symbol;

  if (symbol == nullptr)
    return optional_info;

  llvm::StringRef vtable_name(symbol->GetName().GetCString());
  bool found_expected_start_string =
      vtable_name.startswith("vtable for std::__1::__function::__func<");

  if (!found_expected_start_string)
    return optional_info;

  // Given case 1 or 3 we have a vtable name, we are want to extract the first
  // template parameter
  //
  //  ... __func<main::$_0, std::__1::allocator<main::$_0> ...
  //             ^^^^^^^^^
  //
  // We do this by find the first < and , and extracting in between.
  //
  // This covers the case of the lambda known at compile time.
  size_t first_open_angle_bracket = vtable_name.find('<') + 1;
  size_t first_comma = vtable_name.find(',');

  llvm::StringRef first_template_parameter =
      vtable_name.slice(first_open_angle_bracket, first_comma);

  Address function_address_resolved;

  // Setup for cases 2, 4 and 5 we have a pointer to a function after the
  // vtable. We will use a process of elimination to drop through each case
  // and obtain the data we need.
  if (target.GetSectionLoadList().ResolveLoadAddress(
          possible_function_address, function_address_resolved)) {
    target.GetImages().ResolveSymbolContextForAddress(
        function_address_resolved, eSymbolContextEverything, sc);
    symbol = sc.symbol;
  }

    //
    // Load persisted scope info.
    //
    void ScopeInfo::GetScopeInfo(Parser *parser, ByteCodeGenerator* byteCodeGenerator, FuncInfo* funcInfo, Scope* scope)
    {
        ScriptContext* scriptContext;
        ArenaAllocator* alloc;

        // Load scope attributes and push onto scope stack.
        scope->SetIsDynamic(this->isDynamic);
        if (this->isObject)
        {
            scope->SetIsObject();
        }
        scope->SetMustInstantiate(this->mustInstantiate);
        if (!this->GetCanMergeWithBodyScope())
        {
            scope->SetCannotMergeWithBodyScope();
        }
        scope->SetHasOwnLocalInClosure(this->hasLocalInClosure);
        if (parser)
        {
            scriptContext = parser->GetScriptContext();
            alloc = parser->GetAllocator();
        }
        else
        {
            TRACE_BYTECODE(_u("\nRestore ScopeInfo: %s #symbols: %d %s\n"),
                funcInfo->name, symbolCount, isObject ? _u("isObject") : _u(""));

            Assert(!this->isCached || scope == funcInfo->GetBodyScope());
            funcInfo->SetHasCachedScope(this->isCached);
            byteCodeGenerator->PushScope(scope);

            // The scope is already populated, so we're done.
            return;
        }

        // Load scope symbols
        // On first access to the scopeinfo, replace the ID's with PropertyRecord*'s to save the dictionary lookup
        // on later accesses. Replace them all before allocating Symbol's to prevent inconsistency on OOM.
        if (!this->areNamesCached && !PHASE_OFF1(Js::CacheScopeInfoNamesPhase))
        {
            for (int i = 0; i < symbolCount; i++)
            {
                PropertyId propertyId = GetSymbolId(i);
                if (propertyId != 0) // There may be empty slots, e.g. "arguments" may have no slot
                {
                    PropertyRecord const* name = scriptContext->GetPropertyName(propertyId);
                    this->SetPropertyName(i, name);
                }
            }
            this->areNamesCached = true;
        }

        for (int i = 0; i < symbolCount; i++)
        {
            PropertyRecord const* name = nullptr;
            if (this->areNamesCached)
            {
                name = this->GetPropertyName(i);
            }
            else
            {
                PropertyId propertyId = GetSymbolId(i);
                if (propertyId != 0) // There may be empty slots, e.g. "arguments" may have no slot
                {
                    name = scriptContext->GetPropertyName(propertyId);
                }
            }

            if (name != nullptr)
            {
                SymbolType symbolType = GetSymbolType(i);
                SymbolName symName(name->GetBuffer(), name->GetLength());
                Symbol *sym = Anew(alloc, Symbol, symName, nullptr, symbolType);

                sym->SetScopeSlot(static_cast<PropertyId>(i));
                sym->SetIsBlockVar(GetIsBlockVariable(i));
                if (GetHasFuncAssignment(i))
                {
                    sym->RestoreHasFuncAssignment();
                }
                scope->AddNewSymbol(sym);
                if (parser)
                {
                    parser->RestorePidRefForSym(sym);
                }

                TRACE_BYTECODE(_u("%12s %d\n"), sym->GetName().GetBuffer(), sym->GetScopeSlot());
            }
        }
        this->scope = scope;
        DebugOnly(scope->isRestored = true);
    }

    /* Both are symbols, the arity needs to match */
    bool operator==(const Symbol &lhs, const Symbol &rhs)
    {
      return ( (lhs.GetName() == rhs.GetName()) &&
	       (lhs.GetArity() == rhs.GetArity()) );
    }