C++ Address::SetRawAddress方法代码示例

bool
JavaLanguageRuntime::GetDynamicTypeAndAddress(ValueObject &in_value, lldb::DynamicValueType use_dynamic,
                                              TypeAndOrName &class_type_or_name, Address &dynamic_address,
                                              Value::ValueType &value_type)
{
    class_type_or_name.Clear();

    // null references don't have a dynamic type
    if (in_value.IsNilReference())
        return false;

    ExecutionContext exe_ctx(in_value.GetExecutionContextRef());
    Target *target = exe_ctx.GetTargetPtr();
    if (!target)
        return false;

    ConstString linkage_name;
    CompilerType in_type = in_value.GetCompilerType();
    if (in_type.IsPossibleDynamicType(nullptr, false, false))
        linkage_name = GetDynamicTypeId(&exe_ctx, target, in_value);
    else
        linkage_name = JavaASTContext::GetLinkageName(in_type);

    if (!linkage_name)
        return false;

    class_type_or_name.SetName(in_type.GetNonReferenceType().GetTypeName());

    SymbolContext sc;
    TypeList class_types;
    llvm::DenseSet<SymbolFile *> searched_symbol_files;
    size_t num_matches = target->GetImages().FindTypes(sc, linkage_name,
                                                       true, // name_is_fully_qualified
                                                       UINT32_MAX, searched_symbol_files, class_types);

    for (size_t i = 0; i < num_matches; ++i)
    {
        TypeSP type_sp = class_types.GetTypeAtIndex(i);
        CompilerType compiler_type = type_sp->GetFullCompilerType();

        if (compiler_type.GetMinimumLanguage() != eLanguageTypeJava)
            continue;

        if (compiler_type.GetCompleteType() && compiler_type.IsCompleteType())
        {
            class_type_or_name.SetTypeSP(type_sp);

            Value &value = in_value.GetValue();
            value_type = value.GetValueType();
            dynamic_address.SetRawAddress(value.GetScalar().ULongLong(0));
            return true;
        }
    }
    return false;
}

break_id_t
SBBreakpoint::FindLocationIDByAddress (addr_t vm_addr)
{
    break_id_t break_id = LLDB_INVALID_BREAK_ID;

    if (m_opaque_sp && vm_addr != LLDB_INVALID_ADDRESS)
    {
        std::lock_guard<std::recursive_mutex> guard(m_opaque_sp->GetTarget().GetAPIMutex());
        Address address;
        Target &target = m_opaque_sp->GetTarget();
        if (!target.GetSectionLoadList().ResolveLoadAddress(vm_addr, address))
        {
            address.SetRawAddress (vm_addr);
        }
        break_id = m_opaque_sp->FindLocationIDByAddress (address);
    }

    return break_id;
}

break_id_t
SBBreakpoint::FindLocationIDByAddress (addr_t vm_addr)
{
    break_id_t break_id = LLDB_INVALID_BREAK_ID;

    if (m_opaque_sp && vm_addr != LLDB_INVALID_ADDRESS)
    {
        Mutex::Locker api_locker (m_opaque_sp->GetTarget().GetAPIMutex());
        Address address;
        Target &target = m_opaque_sp->GetTarget();
        if (target.GetSectionLoadList().ResolveLoadAddress (vm_addr, address) == false)
        {
            address.SetRawAddress (vm_addr);
        }
        break_id = m_opaque_sp->FindLocationIDByAddress (address);
    }

    return break_id;
}

// for V1 runtime we just try to return a class name as that is the minimum level of support
// required for the data formatters to work
bool
AppleObjCRuntimeV1::GetDynamicTypeAndAddress (ValueObject &in_value,
                                             lldb::DynamicValueType use_dynamic, 
                                             TypeAndOrName &class_type_or_name, 
                                             Address &address)
{
    class_type_or_name.Clear();
    if (CouldHaveDynamicValue(in_value))
    {
        auto class_descriptor(GetClassDescriptor(in_value));
        if (class_descriptor && class_descriptor->IsValid() && class_descriptor->GetClassName())
        {
            const addr_t object_ptr = in_value.GetPointerValue();
            address.SetRawAddress(object_ptr);
            class_type_or_name.SetName(class_descriptor->GetClassName());
        }
    }
    return class_type_or_name.IsEmpty() == false;
}

static bool
ReadAddress (ExecutionContextScope *exe_scope, const Address &address, uint32_t pointer_size, Address &deref_so_addr)
{
    if (exe_scope == NULL)
        return false;


    bool success = false;
    addr_t deref_addr = ReadUIntMax64 (exe_scope, address, pointer_size, success);
    if (success)
    {
        ExecutionContext exe_ctx;
        exe_scope->CalculateExecutionContext(exe_ctx);
        // If we have any sections that are loaded, try and resolve using the
        // section load list
        Target *target = exe_ctx.GetTargetPtr();
        if (target && !target->GetSectionLoadList().IsEmpty())
        {
            if (target->GetSectionLoadList().ResolveLoadAddress (deref_addr, deref_so_addr))
                return true;
        }
        else
        {
            // If we were not running, yet able to read an integer, we must
            // have a module
            ModuleSP module_sp (address.GetModule());

            assert (module_sp);
            if (module_sp->ResolveFileAddress(deref_addr, deref_so_addr))
                return true;
        }

        // We couldn't make "deref_addr" into a section offset value, but we were
        // able to read the address, so we return a section offset address with
        // no section and "deref_addr" as the offset (address).
        deref_so_addr.SetRawAddress(deref_addr);
        return true;
    }
    return false;
}

bool ItaniumABILanguageRuntime::GetDynamicTypeAndAddress(
    ValueObject &in_value, lldb::DynamicValueType use_dynamic,
    TypeAndOrName &class_type_or_name, Address &dynamic_address,
    Value::ValueType &value_type) {
  // For Itanium, if the type has a vtable pointer in the object, it will be at
  // offset 0
  // in the object.  That will point to the "address point" within the vtable
  // (not the beginning of the
  // vtable.)  We can then look up the symbol containing this "address point"
  // and that symbol's name
  // demangled will contain the full class name.
  // The second pointer above the "address point" is the "offset_to_top".  We'll
  // use that to get the
  // start of the value object which holds the dynamic type.
  //

  class_type_or_name.Clear();
  value_type = Value::ValueType::eValueTypeScalar;

  // Only a pointer or reference type can have a different dynamic and static
  // type:
  if (CouldHaveDynamicValue(in_value)) {
    // First job, pull out the address at 0 offset from the object.
    AddressType address_type;
    lldb::addr_t original_ptr = in_value.GetPointerValue(&address_type);
    if (original_ptr == LLDB_INVALID_ADDRESS)
      return false;

    ExecutionContext exe_ctx(in_value.GetExecutionContextRef());

    Process *process = exe_ctx.GetProcessPtr();

    if (process == nullptr)
      return false;

    Error error;
    const lldb::addr_t vtable_address_point =
        process->ReadPointerFromMemory(original_ptr, error);

    if (!error.Success() || vtable_address_point == LLDB_INVALID_ADDRESS) {
      return false;
    }

    class_type_or_name = GetTypeInfoFromVTableAddress(in_value, original_ptr,
                                                      vtable_address_point);

    if (class_type_or_name) {
      TypeSP type_sp = class_type_or_name.GetTypeSP();
      // There can only be one type with a given name,
      // so we've just found duplicate definitions, and this
      // one will do as well as any other.
      // We don't consider something to have a dynamic type if
      // it is the same as the static type.  So compare against
      // the value we were handed.
      if (type_sp) {
        if (ClangASTContext::AreTypesSame(in_value.GetCompilerType(),
                                          type_sp->GetForwardCompilerType())) {
          // The dynamic type we found was the same type,
          // so we don't have a dynamic type here...
          return false;
        }

        // The offset_to_top is two pointers above the vtable pointer.
        const uint32_t addr_byte_size = process->GetAddressByteSize();
        const lldb::addr_t offset_to_top_location =
            vtable_address_point - 2 * addr_byte_size;
        // Watch for underflow, offset_to_top_location should be less than
        // vtable_address_point
        if (offset_to_top_location >= vtable_address_point)
          return false;
        const int64_t offset_to_top = process->ReadSignedIntegerFromMemory(
            offset_to_top_location, addr_byte_size, INT64_MIN, error);

        if (offset_to_top == INT64_MIN)
          return false;
        // So the dynamic type is a value that starts at offset_to_top
        // above the original address.
        lldb::addr_t dynamic_addr = original_ptr + offset_to_top;
        if (!process->GetTarget().GetSectionLoadList().ResolveLoadAddress(
                dynamic_addr, dynamic_address)) {
          dynamic_address.SetRawAddress(dynamic_addr);
        }
        return true;
      }
    }
  }

  return class_type_or_name.IsEmpty() == false;
}

//.........这里部分代码省略.........
                            if (log)
                            {
                                for (i = 0; i < num_matches; i++)
                                {
                                    type_sp = class_types.GetTypeAtIndex(i);
                                    if (type_sp)
                                    {
                                        if (log)
                                            log->Printf ("0x%16.16" PRIx64 ": static-type = '%s' has multiple matching dynamic types: uid={0x%" PRIx64 "}, type-name='%s'\n",
                                                         original_ptr,
                                                         in_value.GetTypeName().AsCString(),
                                                         type_sp->GetID(),
                                                         type_sp->GetName().GetCString());
                                    }
                                }
                            }

                            for (i = 0; i < num_matches; i++)
                            {
                                type_sp = class_types.GetTypeAtIndex(i);
                                if (type_sp)
                                {
                                    if (type_sp->GetClangFullType().IsCXXClassType())
                                    {
                                        if (log)
                                            log->Printf ("0x%16.16" PRIx64 ": static-type = '%s' has multiple matching dynamic types, picking this one: uid={0x%" PRIx64 "}, type-name='%s'\n",
                                                         original_ptr,
                                                         in_value.GetTypeName().AsCString(),
                                                         type_sp->GetID(),
                                                         type_sp->GetName().GetCString());
                                        class_type_or_name.SetTypeSP(type_sp);
                                        break;
                                    }
                                }
                            }
                            
                            if (i == num_matches)
                            {
                                if (log)
                                    log->Printf ("0x%16.16" PRIx64 ": static-type = '%s' has multiple matching dynamic types, didn't find a C++ match\n",
                                                 original_ptr,
                                                 in_value.GetTypeName().AsCString());
                                return false;
                            }
                        }

                        // There can only be one type with a given name,
                        // so we've just found duplicate definitions, and this
                        // one will do as well as any other.
                        // We don't consider something to have a dynamic type if
                        // it is the same as the static type.  So compare against
                        // the value we were handed.
                        if (type_sp)
                        {
                            if (ClangASTContext::AreTypesSame (in_value.GetClangType(),
                                                               type_sp->GetClangFullType()))
                            {
                                // The dynamic type we found was the same type,
                                // so we don't have a dynamic type here...
                                return false;
                            }

                            // The offset_to_top is two pointers above the address.
                            Address offset_to_top_address = address_point_address;
                            int64_t slide = -2 * ((int64_t) target->GetArchitecture().GetAddressByteSize());
                            offset_to_top_address.Slide (slide);
                            
                            Error error;
                            lldb::addr_t offset_to_top_location = offset_to_top_address.GetLoadAddress(target);
                            
                            size_t bytes_read = process->ReadMemory (offset_to_top_location, 
                                                                     memory_buffer, 
                                                                     address_byte_size, 
                                                                     error);
                                                                     
                            if (!error.Success() || (bytes_read != address_byte_size))
                            {
                                return false;
                            }
                            
                            offset = 0;
                            int64_t offset_to_top = data.GetMaxS64(&offset, process->GetAddressByteSize());
                            
                            // So the dynamic type is a value that starts at offset_to_top
                            // above the original address.
                            lldb::addr_t dynamic_addr = original_ptr + offset_to_top;
                            if (!target->GetSectionLoadList().ResolveLoadAddress (dynamic_addr, dynamic_address))
                            {
                                dynamic_address.SetRawAddress(dynamic_addr);
                            }
                            return true;
                        }
                    }
                }
            }
        }
    }
    
    return class_type_or_name.IsEmpty() == false;
}