C# BlobBuilder.Align方法代码示例

        public void WriteData(BlobBuilder resourceWriter)
        {
            if (_fileReference == null)
            {
                try
                {
                    using (Stream stream = _streamProvider())
                    {
                        if (stream == null)
                        {
                            throw new InvalidOperationException(CodeAnalysisResources.ResourceStreamProviderShouldReturnNonNullStream);
                        }

                        var count = (int)(stream.Length - stream.Position);
                        resourceWriter.WriteInt32(count);

                        int bytesWritten = resourceWriter.TryWriteBytes(stream, count);
                        if (bytesWritten != count)
                        {
                            throw new EndOfStreamException(
                                    string.Format(CultureInfo.CurrentUICulture, CodeAnalysisResources.ResourceStreamEndedUnexpectedly, bytesWritten, count));
                        }
                        resourceWriter.Align(8);
                    }
                }
                catch (Exception e)
                {
                    throw new ResourceException(_name, e);
                }
            }
        }

        private void WriteTextSection(
            Stream peStream,
            SectionHeader textSection,
            int importTableRva,
            int importAddressTableRva,
            int entryPointToken,
            BlobBuilder metadataWriter,
            BlobBuilder ilWriter,
            BlobBuilder mappedFieldDataWriter,
            BlobBuilder managedResourceWriter,
            MetadataSizes metadataSizes,
            ContentId nativePdbContentId,
            ContentId portablePdbContentId,
            out long metadataPosition)
        {
            // TODO: zero out all bytes:
            peStream.Position = textSection.PointerToRawData;

            if (_properties.RequiresStartupStub)
            {
                WriteImportAddressTable(peStream, importTableRva);
            }

            var corHeader = CreateCorHeader(metadataSizes, textSection.RelativeVirtualAddress, entryPointToken);
            WriteCorHeader(peStream, corHeader);

            // IL:
            ilWriter.Align(4);
            ilWriter.WriteContentTo(peStream);

            // metadata:
            metadataPosition = peStream.Position;
            Debug.Assert(metadataWriter.Count % 4 == 0);
            metadataWriter.WriteContentTo(peStream);

            // managed resources:
            Debug.Assert(managedResourceWriter.Count % 4 == 0);
            managedResourceWriter.WriteContentTo(peStream);

            // strong name signature:
            WriteSpaceForHash(peStream, metadataSizes.StrongNameSignatureSize);

            if (EmitPdb)
            {
                WriteDebugTable(peStream, textSection, nativePdbContentId, portablePdbContentId, metadataSizes);
            }

            if (_properties.RequiresStartupStub)
            {
                WriteImportTable(peStream, importTableRva, importAddressTableRva);
                WriteNameTable(peStream);
                WriteRuntimeStartupStub(peStream, importAddressTableRva);
            }

            // mapped field data:            
            mappedFieldDataWriter.WriteContentTo(peStream);

            // TODO: zero out all bytes:
            int alignedPosition = textSection.PointerToRawData + textSection.SizeOfRawData;
            if (peStream.Position != alignedPosition)
            {
                peStream.Position = alignedPosition - 1;
                peStream.WriteByte(0);
            }
        }

        public void Serialize(BlobBuilder builder, PEDirectoriesBuilder headers, out ContentId contentId)
        {
            var serializedSections = SerializeSections();
            Blob stampFixup;

            WritePESignature(builder);
            WriteCoffHeader(builder, serializedSections, out stampFixup);
            WritePEHeader(builder, headers, serializedSections);
            WriteSectionHeaders(builder, serializedSections);
            builder.Align(FileAlignment);

            foreach (var section in serializedSections)
            {
                builder.LinkSuffix(section.Builder);
                builder.Align(FileAlignment);
            }

            contentId = IdProvider(builder);

            // patch timestamp in COFF header:
            var stampWriter = new BlobWriter(stampFixup);
            stampWriter.WriteBytes(contentId.Stamp);
            Debug.Assert(stampWriter.RemainingBytes == 0);
        }

        public static void SerializeWin32Resources(BlobBuilder builder, IEnumerable<IWin32Resource> theResources, int resourcesRva)
        {
            theResources = SortResources(theResources);

            Directory typeDirectory = new Directory(string.Empty, 0);
            Directory nameDirectory = null;
            Directory languageDirectory = null;
            int lastTypeID = int.MinValue;
            string lastTypeName = null;
            int lastID = int.MinValue;
            string lastName = null;
            uint sizeOfDirectoryTree = 16;

            //EDMAURER note that this list is assumed to be sorted lowest to highest 
            //first by typeId, then by Id.
            foreach (IWin32Resource r in theResources)
            {
                bool typeDifferent = (r.TypeId < 0 && r.TypeName != lastTypeName) || r.TypeId > lastTypeID;
                if (typeDifferent)
                {
                    lastTypeID = r.TypeId;
                    lastTypeName = r.TypeName;
                    if (lastTypeID < 0)
                    {
                        Debug.Assert(typeDirectory.NumberOfIdEntries == 0, "Not all Win32 resources with types encoded as strings precede those encoded as ints");
                        typeDirectory.NumberOfNamedEntries++;
                    }
                    else
                    {
                        typeDirectory.NumberOfIdEntries++;
                    }

                    sizeOfDirectoryTree += 24;
                    typeDirectory.Entries.Add(nameDirectory = new Directory(lastTypeName, lastTypeID));
                }

                if (typeDifferent || (r.Id < 0 && r.Name != lastName) || r.Id > lastID)
                {
                    lastID = r.Id;
                    lastName = r.Name;
                    if (lastID < 0)
                    {
                        Debug.Assert(nameDirectory.NumberOfIdEntries == 0, "Not all Win32 resources with names encoded as strings precede those encoded as ints");
                        nameDirectory.NumberOfNamedEntries++;
                    }
                    else
                    {
                        nameDirectory.NumberOfIdEntries++;
                    }

                    sizeOfDirectoryTree += 24;
                    nameDirectory.Entries.Add(languageDirectory = new Directory(lastName, lastID));
                }

                languageDirectory.NumberOfIdEntries++;
                sizeOfDirectoryTree += 8;
                languageDirectory.Entries.Add(r);
            }

            var dataWriter = new BlobBuilder();

            //'dataWriter' is where opaque resource data goes as well as strings that are used as type or name identifiers
            WriteDirectory(typeDirectory, builder, 0, 0, sizeOfDirectoryTree, resourcesRva, dataWriter);
            builder.LinkSuffix(dataWriter);
            builder.WriteByte(0);
            builder.Align(4);
        }

        private void WriteRuntimeStartupStub(BlobBuilder sectionBuilder, int importAddressTableRva, ulong baseAddress)
        {
            // entry point code, consisting of a jump indirect to _CorXXXMain
            if (Is32Bit)
            {
                // Write zeros (nops) to pad the entry point code so that the target address is aligned on a 4 byte boundary.
                // Note that the section is aligned to FileAlignment, which is at least 512, so we can align relatively to the start of the section.
                sectionBuilder.Align(4);

                sectionBuilder.WriteUInt16(0);
                sectionBuilder.WriteByte(0xff);
                sectionBuilder.WriteByte(0x25); //4
                sectionBuilder.WriteUInt32((uint)importAddressTableRva + (uint)baseAddress); //8
            }
            else
            {
                // Write zeros (nops) to pad the entry point code so that the target address is aligned on a 8 byte boundary.
                // Note that the section is aligned to FileAlignment, which is at least 512, so we can align relatively to the start of the section.
                sectionBuilder.Align(8);

                sectionBuilder.WriteUInt32(0);
                sectionBuilder.WriteUInt16(0);
                sectionBuilder.WriteByte(0xff);
                sectionBuilder.WriteByte(0x25); //8
                sectionBuilder.WriteUInt64((ulong)importAddressTableRva + baseAddress); //16
            }
        }

        /// <summary>
        /// Serializes .text section data into a specified <paramref name="builder"/>.
        /// </summary>
        /// <param name="builder">An empty builder to serialize section data to.</param>
        /// <param name="relativeVirtualAddess">Relative virtual address of the section within the containing PE file.</param>
        /// <param name="entryPointTokenOrRelativeVirtualAddress">Entry point token or RVA (<see cref="CorHeader.EntryPointTokenOrRelativeVirtualAddress"/>)</param>
        /// <param name="corFlags">COR Flags (<see cref="CorHeader.Flags"/>).</param>
        /// <param name="baseAddress">Base address of the PE image.</param>
        /// <param name="metadataBuilder"><see cref="BlobBuilder"/> containing metadata. Must be populated with data. Linked into the <paramref name="builder"/> and can't be expanded afterwards.</param>
        /// <param name="ilBuilder"><see cref="BlobBuilder"/> containing IL stream. Must be populated with data. Linked into the <paramref name="builder"/> and can't be expanded afterwards.</param>
        /// <param name="mappedFieldDataBuilder"><see cref="BlobBuilder"/> containing mapped field data. Must be populated with data. Linked into the <paramref name="builder"/> and can't be expanded afterwards.</param>
        /// <param name="resourceBuilder"><see cref="BlobBuilder"/> containing managed resource data. Must be populated with data. Linked into the <paramref name="builder"/> and can't be expanded afterwards.</param>
        /// <param name="debugTableBuilderOpt"><see cref="BlobBuilder"/> containing debug table data. Must be populated with data. Linked into the <paramref name="builder"/> and can't be expanded afterwards.</param>
        public void Serialize(
            BlobBuilder builder,
            int relativeVirtualAddess,
            int entryPointTokenOrRelativeVirtualAddress,
            CorFlags corFlags,
            ulong baseAddress,
            BlobBuilder metadataBuilder,
            BlobBuilder ilBuilder,
            BlobBuilder mappedFieldDataBuilder,
            BlobBuilder resourceBuilder,
            BlobBuilder debugTableBuilderOpt)
        {
            Debug.Assert(builder.Count == 0);
            Debug.Assert(metadataBuilder.Count == MetadataSize);
            Debug.Assert(metadataBuilder.Count % 4 == 0);
            Debug.Assert(ilBuilder.Count == ILStreamSize);
            Debug.Assert(mappedFieldDataBuilder.Count == MappedFieldDataSize);
            Debug.Assert(resourceBuilder.Count == ResourceDataSize);
            Debug.Assert(resourceBuilder.Count % 4 == 0);

            // TODO: avoid recalculation
            int importTableRva = GetImportTableDirectoryEntry(relativeVirtualAddess).RelativeVirtualAddress;
            int importAddressTableRva = GetImportAddressTableDirectoryEntry(relativeVirtualAddess).RelativeVirtualAddress;

            if (RequiresStartupStub)
            {
                WriteImportAddressTable(builder, importTableRva);
            }

            WriteCorHeader(builder, relativeVirtualAddess, entryPointTokenOrRelativeVirtualAddress, corFlags);

            // IL:
            ilBuilder.Align(4);
            builder.LinkSuffix(ilBuilder);

            // metadata:
            builder.LinkSuffix(metadataBuilder);

            // managed resources:
            builder.LinkSuffix(resourceBuilder);

            // strong name signature:
            builder.WriteBytes(0, StrongNameSignatureSize);

            if (debugTableBuilderOpt != null)
            {
                builder.LinkSuffix(debugTableBuilderOpt);
            }

            if (RequiresStartupStub)
            {
                WriteImportTable(builder, importTableRva, importAddressTableRva);
                WriteNameTable(builder);
                WriteRuntimeStartupStub(builder, importAddressTableRva, baseAddress);
            }

            // mapped field data:            
            builder.LinkSuffix(mappedFieldDataBuilder);

            Debug.Assert(builder.Count == ComputeSizeOfTextSection());
        }

        internal static ExceptionRegionEncoder SerializeTableHeader(BlobBuilder builder, int exceptionRegionCount, bool hasSmallRegions)
        {
            Debug.Assert(exceptionRegionCount > 0);

            const byte EHTableFlag = 0x01;
            const byte FatFormatFlag = 0x40;

            bool hasSmallFormat = hasSmallRegions && IsSmallRegionCount(exceptionRegionCount);
            int dataSize = GetExceptionTableSize(exceptionRegionCount, hasSmallFormat);

            builder.Align(4);
            if (hasSmallFormat)
            {
                builder.WriteByte(EHTableFlag);
                builder.WriteByte(unchecked((byte)dataSize));
                builder.WriteInt16(0);
            }
            else
            {
                Debug.Assert(dataSize <= 0x00ffffff);
                builder.WriteByte(EHTableFlag | FatFormatFlag);
                builder.WriteByte(unchecked((byte)dataSize));
                builder.WriteUInt16(unchecked((ushort)(dataSize >> 8)));
            }

            return new ExceptionRegionEncoder(builder, hasSmallFormat);
        }

        public void WriteAlignPad()
        {
            var writer = new BlobBuilder(4);

            writer.WriteByte(0x01);
            writer.PadTo(2);
            writer.WriteByte(0x02);
            writer.Align(4);
            writer.Align(4);

            writer.WriteByte(0x03);
            writer.Align(4);

            writer.WriteByte(0x04);
            writer.WriteByte(0x05);
            writer.Align(8);

            writer.WriteByte(0x06);
            writer.Align(2);
            writer.Align(1);

            AssertEx.Equal(new byte[]
            {
                0x01, 0x00, 0x02, 0x00,
                0x03, 0x00, 0x00, 0x00,
                0x04, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                0x06, 0x00
            }, writer.ToArray());
        }

//.........这里部分代码省略.........
                this.SerializeEncLogTable(writer);
            }

            if (metadataSizes.IsPresent(TableIndex.EncMap))
            {
                this.SerializeEncMapTable(writer);
            }

            if (metadataSizes.IsPresent(TableIndex.Assembly))
            {
                this.SerializeAssemblyTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.AssemblyRef))
            {
                this.SerializeAssemblyRefTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.File))
            {
                this.SerializeFileTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.ExportedType))
            {
                this.SerializeExportedTypeTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.ManifestResource))
            {
                this.SerializeManifestResourceTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.NestedClass))
            {
                this.SerializeNestedClassTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.GenericParam))
            {
                this.SerializeGenericParamTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.MethodSpec))
            {
                this.SerializeMethodSpecTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.GenericParamConstraint))
            {
                this.SerializeGenericParamConstraintTable(writer, metadataSizes);
            }

            // debug tables
            if (metadataSizes.IsPresent(TableIndex.Document))
            {
                this.SerializeDocumentTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.MethodDebugInformation))
            {
                this.SerializeMethodDebugInformationTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.LocalScope))
            {
                this.SerializeLocalScopeTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.LocalVariable))
            {
                this.SerializeLocalVariableTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.LocalConstant))
            {
                this.SerializeLocalConstantTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.ImportScope))
            {
                this.SerializeImportScopeTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.StateMachineMethod))
            {
                this.SerializeStateMachineMethodTable(writer, metadataSizes);
            }

            if (metadataSizes.IsPresent(TableIndex.CustomDebugInformation))
            {
                this.SerializeCustomDebugInformationTable(writer, metadataSizes);
            }

            writer.WriteByte(0);
            writer.Align(4);

            int endPosition = writer.Count;
            Debug.Assert(metadataSizes.MetadataTableStreamSize == endPosition - startPosition);
        }