DwarfCompilationUnit only collect one or two DwarfSymbols in ReadData method call

[hyzhappy]

It seens a break there at line 432 in DwarfCompilationUnit.cs that break the loop to collect all the symbols

                foreach (DataDescriptionAttribute descriptionAttribute in description.Attributes)
                {
                    DwarfAttributeValue attributeValue = new DwarfAttributeValue();
                    DwarfAttribute attribute = descriptionAttribute.Attribute;
                    DwarfFormat format = descriptionAttribute.Format;

                    switch (format)
                    {
                        case DwarfFormat.Address:
                            attributeValue.Type = DwarfAttributeValueType.Address;
                            attributeValue.Value = debugData.ReadUlong(addressSize);
                            break;

                        case DwarfFormat.Block:
                            attributeValue.Type = DwarfAttributeValueType.Block;
                            attributeValue.Value = debugData.ReadBlock(debugData.ULEB128());
                            break;

                        case DwarfFormat.Block1:
                            attributeValue.Type = DwarfAttributeValueType.Block;
                            attributeValue.Value = debugData.ReadBlock(debugData.ReadByte());
                            break;

                        case DwarfFormat.Block2:
                            attributeValue.Type = DwarfAttributeValueType.Block;
                            attributeValue.Value = debugData.ReadBlock(debugData.ReadUshort());
                            break;

                        case DwarfFormat.Block4:
                            attributeValue.Type = DwarfAttributeValueType.Block;
                            attributeValue.Value = debugData.ReadBlock(debugData.ReadUint());
                            break;

                        case DwarfFormat.Data1:
                            attributeValue.Type = DwarfAttributeValueType.Constant;
                            attributeValue.Value = (ulong)debugData.ReadByte();
                            break;

                        case DwarfFormat.Data2:
                            attributeValue.Type = DwarfAttributeValueType.Constant;
                            attributeValue.Value = (ulong)debugData.ReadUshort();
                            break;

                        case DwarfFormat.Data4:
                            attributeValue.Type = DwarfAttributeValueType.Constant;
                            attributeValue.Value = (ulong)debugData.ReadUint();
                            break;

                        case DwarfFormat.Data8:
                            attributeValue.Type = DwarfAttributeValueType.Constant;
                            attributeValue.Value = debugData.ReadUlong();
                            break;

                        case DwarfFormat.Data16:
                            attributeValue.Type = DwarfAttributeValueType.Constant;
                            attributeValue.Value = debugData.ReadBlock(16);
                            break;

                        case DwarfFormat.SData:
                            attributeValue.Type = DwarfAttributeValueType.Constant;
                            attributeValue.Value = (ulong)debugData.SLEB128();
                            break;

                        case DwarfFormat.UData:
                            attributeValue.Type = DwarfAttributeValueType.Constant;
                            attributeValue.Value = (ulong)debugData.ULEB128();
                            break;

                        case DwarfFormat.String:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            attributeValue.Value = debugData.ReadString();
                            break;

                        case DwarfFormat.LineStrp:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            int offsetStrp = debugData.ReadOffset(is64bit);
                            attributeValue.Value = debugLineStrings.ReadString(offsetStrp);
                            break;

                        case DwarfFormat.Strp:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            offsetStrp = debugData.ReadOffset(is64bit);
                            attributeValue.Value = debugStrings.ReadString(offsetStrp);
                            break;

                        case DwarfFormat.StrpSup:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            // NOTE: we don't support locating this value currently.
                            attributeValue.Offset = (ulong)debugData.ReadOffset(is64bit);
                            break;

                        case DwarfFormat.Flag:
                            attributeValue.Type = DwarfAttributeValueType.Flag;
                            attributeValue.Value = debugData.ReadByte() != 0;
                            break;

                        case DwarfFormat.FlagPresent:
                            attributeValue.Type = DwarfAttributeValueType.Flag;
                            attributeValue.Value = true;
                            break;

                        case DwarfFormat.Ref1:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Value = debugData.ReadByte() + (ulong)beginPosition;
                            break;

                        case DwarfFormat.Ref2:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Value = debugData.ReadUshort() + (ulong)beginPosition;
                            break;

                        case DwarfFormat.Ref4:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Value = debugData.ReadUint() + (ulong)beginPosition;
                            break;

                        case DwarfFormat.Ref8:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Value = debugData.ReadUlong() + (ulong)beginPosition;
                            break;

                        case DwarfFormat.RefUData:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Value = debugData.ULEB128() + (ulong)beginPosition;
                            break;

                        case DwarfFormat.RefAddr:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Value = (ulong)debugData.ReadOffset(is64bit);
                            break;

                        case DwarfFormat.RefSig8:
                            attributeValue.Type = DwarfAttributeValueType.Invalid;
                            debugData.Position += 8;
                            break;

                        case DwarfFormat.RefSup4:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Offset = debugData.ReadUint();
                            // We don't resolve this reference from supplemental data yet.
                            break;

                        case DwarfFormat.RefSup8:
                            attributeValue.Type = DwarfAttributeValueType.Reference;
                            attributeValue.Offset = debugData.ReadUlong();
                            // We don't resolve this reference from supplemental data yet.
                            break;

                        case DwarfFormat.ExpressionLocation:
                            attributeValue.Type = DwarfAttributeValueType.ExpressionLocation;
                            attributeValue.Value = debugData.ReadBlock(debugData.ULEB128());
                            break;

                        case DwarfFormat.SecOffset:
                            attributeValue.Type = DwarfAttributeValueType.SecOffset;
                            attributeValue.Value = (ulong)debugData.ReadOffset(is64bit);
                            if (attribute == DwarfAttribute.RankStrOffsetsBase)
                            {
                                indexOffset = (int)((ulong)attributeValue.Value / (ulong)(is64bit ? 8 : 4));
                            }
                            break;

                        case DwarfFormat.ImplicitConst:
                            attributeValue.Value = descriptionAttribute.Value;
                            break;

                        case DwarfFormat.Strx:
                        case DwarfFormat.GNUStrIndex:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            attributeValue.Offset = debugData.ULEB128();
                            break;

                        case DwarfFormat.Strx1:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            attributeValue.Offset = debugData.ReadByte();
                            break;

                        case DwarfFormat.Strx2:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            attributeValue.Offset = debugData.ReadUshort();
                            break;

                        case DwarfFormat.Strx3:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            attributeValue.Offset = debugData.ReadThreeBytes();
                            break;

                        case DwarfFormat.Strx4:
                            attributeValue.Type = DwarfAttributeValueType.String;
                            attributeValue.Offset = debugData.ReadUint();
                            break;

                        case DwarfFormat.Addrx:
                            attributeValue.Type = DwarfAttributeValueType.Address;
                            attributeValue.Value = debugData.ULEB128() + (ulong)beginPosition;
                            break;

                        // NOTE: we don't resolve any of these new DWARF5 address values yet.
                        case DwarfFormat.Addrx1:
                            attributeValue.Type = DwarfAttributeValueType.Address;
                            attributeValue.Offset = debugData.ReadByte();
                            break;

                        case DwarfFormat.Addrx2:
                            attributeValue.Type = DwarfAttributeValueType.Address;
                            attributeValue.Offset = debugData.ReadUshort();
                            break;

                        case DwarfFormat.Addrx3:
                            attributeValue.Type = DwarfAttributeValueType.Address;
                            attributeValue.Offset = debugData.ReadThreeBytes();
                            break;

                        case DwarfFormat.Addrx4:
                            attributeValue.Type = DwarfAttributeValueType.Address;
                            attributeValue.Offset = debugData.ReadUlong();
                            break;

                        case DwarfFormat.Rnglistx:
                            attributeValue.Type = DwarfAttributeValueType.SecOffset;
                            attributeValue.Value = debugData.ULEB128();
                            break;

                        case DwarfFormat.GNUAddrIndex:
                            break;

                        default:
                            throw new InvalidOperationException($"{attribute} : {format}");
                    }

                    if (attributes.ContainsKey(attribute))
                    {
                        if (attributes[attribute] != attributeValue)
                        {
                            attributes[attribute] = attributeValue;
                        }
                    }
                    else
                    {
                        attributes.Add(attribute, attributeValue);
                    }
                }

                if (indexOffset > -1)
                {
                    foreach (DwarfAttributeValue dwarfAttributeValue in attributes.Values)
                    {
                        if (dwarfAttributeValue.Offset == null ||
                            dwarfAttributeValue.Type != DwarfAttributeValueType.String)
                        {
                            // We current do not post-process all address types.
                            continue;
                        }

                        int debugStringOffsetIndex = Convert.ToInt32(dwarfAttributeValue.Value) + indexOffset;
                        int offset = debugStringOffsets[debugStringOffsetIndex];
                        dwarfAttributeValue.Value = debugStrings.ReadString(offset);
                    }
                }

                DwarfSymbol symbol = new DwarfSymbol()
                {
                    Tag = description.Tag,
                    Attributes = attributes,
                    Offset = dataPosition,
                };

                symbolsByOffset.Add(symbol.Offset, symbol);

                if (parents.Count > 0)
                {
                    parents.Peek().Children.Add(symbol);
                    symbol.Parent = parents.Peek();
                }
                else
                {
                    symbols.Add(symbol);
                }

                if (description.HasChildren)
                {
                    symbol.Children = new List<DwarfSymbol>();
                    parents.Push(symbol);
                }

                break;   // a wrong break here
            }