public void EmitPortableExecutable()
{
bool succeeded = false;
FileStream mapFileStream = null;
TextWriter mapFile = null;
try
{
string mapFileName = Path.ChangeExtension(_objectFilePath, ".map");
mapFileStream = new FileStream(mapFileName, FileMode.Create, FileAccess.Write);
mapFile = new StreamWriter(mapFileStream);
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
mapFile.WriteLine($@"R2R object emission started: {DateTime.Now}");
_sectionBuilder = new SectionBuilder();
_textSectionIndex = _sectionBuilder.AddSection(R2RPEBuilder.TextSectionName, SectionCharacteristics.ContainsCode | SectionCharacteristics.MemExecute | SectionCharacteristics.MemRead, 512);
_rdataSectionIndex = _sectionBuilder.AddSection(".rdata", SectionCharacteristics.ContainsInitializedData | SectionCharacteristics.MemRead, 512);
_dataSectionIndex = _sectionBuilder.AddSection(".data", SectionCharacteristics.ContainsInitializedData | SectionCharacteristics.MemWrite | SectionCharacteristics.MemRead, 512);
int nodeIndex = -1;
foreach (var depNode in _nodes)
{
++nodeIndex;
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(_nodeFactory))
{
continue;
}
ObjectData nodeContents = node.GetData(_nodeFactory);
string name = null;
if (mapFile != null)
{
name = depNode.GetType().ToString();
int firstGeneric = name.IndexOf('[');
if (firstGeneric < 0)
{
firstGeneric = name.Length;
}
int lastDot = name.LastIndexOf('.', firstGeneric - 1, firstGeneric);
if (lastDot > 0)
{
name = name.Substring(lastDot + 1);
}
}
EmitObjectData(nodeContents, nodeIndex, name, node.Section, mapFile);
}
_sectionBuilder.SetReadyToRunHeaderTable(_nodeFactory.Header, _nodeFactory.Header.GetData(_nodeFactory).Data.Length);
Machine targetMachine;
switch (_nodeFactory.Target.Architecture)
{
case Internal.TypeSystem.TargetArchitecture.X64:
targetMachine = Machine.Amd64;
break;
case Internal.TypeSystem.TargetArchitecture.X86:
targetMachine = Machine.I386;
break;
default:
throw new NotImplementedException(_nodeFactory.Target.Architecture.ToString());
}
using (var peStream = File.Create(_objectFilePath))
{
_sectionBuilder.EmitR2R(targetMachine, _inputPeReader, UpdateDirectories, peStream);
}
mapFile.WriteLine($@"R2R object emission finished: {DateTime.Now}, {stopwatch.ElapsedMilliseconds} msecs");
mapFile.Flush();
mapFileStream.Flush();
succeeded = true;
}
finally
{
if (mapFile != null)
{
mapFile.Dispose();
}
if (mapFileStream != null)
{
mapFileStream.Dispose();
}
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(_objectFilePath);
}
catch
{
}
}
}
}
public static void EmitObject(string objectFilePath, IEnumerable <DependencyNode> nodes, NodeFactory factory, IObjectDumper dumper)
{
ObjectWriter objectWriter = new ObjectWriter(objectFilePath, factory);
bool succeeded = false;
try
{
ObjectNodeSection managedCodeSection;
if (factory.Target.OperatingSystem == TargetOS.Windows)
{
managedCodeSection = MethodCodeNode.WindowsContentSection;
// Emit sentinels for managed code section.
ObjectNodeSection codeStartSection = factory.CompilationModuleGroup.IsSingleFileCompilation ?
MethodCodeNode.StartSection :
objectWriter.GetSharedSection(MethodCodeNode.StartSection, "__managedcode_a");
objectWriter.SetSection(codeStartSection);
objectWriter.EmitSymbolDef(new Utf8StringBuilder().Append("__managedcode_a"));
objectWriter.EmitIntValue(0, 1);
ObjectNodeSection codeEndSection = factory.CompilationModuleGroup.IsSingleFileCompilation ?
MethodCodeNode.EndSection :
objectWriter.GetSharedSection(MethodCodeNode.EndSection, "__managedcode_z");
objectWriter.SetSection(codeEndSection);
objectWriter.EmitSymbolDef(new Utf8StringBuilder().Append("__managedcode_z"));
objectWriter.EmitIntValue(1, 1);
}
else
{
managedCodeSection = MethodCodeNode.UnixContentSection;
// TODO 2916: managed code section has to be created here, switch is not necessary.
objectWriter.SetSection(MethodCodeNode.UnixContentSection);
objectWriter.SetSection(LsdaSection);
}
objectWriter.SetCodeSectionAttribute(managedCodeSection);
// Build file info map.
objectWriter.BuildFileInfoMap(nodes);
var listOfOffsets = new List <int>();
foreach (DependencyNode depNode in nodes)
{
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(factory))
{
continue;
}
ObjectData nodeContents = node.GetData(factory);
if (dumper != null)
{
dumper.DumpObjectNode(factory.NameMangler, node, nodeContents);
}
#if DEBUG
foreach (ISymbolNode definedSymbol in nodeContents.DefinedSymbols)
{
try
{
_previouslyWrittenNodeNames.Add(definedSymbol.GetMangledName(factory.NameMangler), definedSymbol);
}
catch (ArgumentException)
{
ISymbolNode alreadyWrittenSymbol = _previouslyWrittenNodeNames[definedSymbol.GetMangledName(factory.NameMangler)];
Debug.Assert(false, "Duplicate node name emitted to file",
$"Symbol {definedSymbol.GetMangledName(factory.NameMangler)} has already been written to the output object file {objectFilePath} with symbol {alreadyWrittenSymbol}");
}
}
#endif
ObjectNodeSection section = node.Section;
if (objectWriter.ShouldShareSymbol(node))
{
section = objectWriter.GetSharedSection(section, ((ISymbolNode)node).GetMangledName(factory.NameMangler));
}
// Ensure section and alignment for the node.
objectWriter.SetSection(section);
objectWriter.EmitAlignment(nodeContents.Alignment);
objectWriter.ResetByteRunInterruptionOffsets(nodeContents.Relocs);
// Build symbol definition map.
objectWriter.BuildSymbolDefinitionMap(node, nodeContents.DefinedSymbols);
// The DWARF CFI unwind is implemented for AMD64 only.
if (!factory.Target.IsWindows && (factory.Target.Architecture == TargetArchitecture.X64))
{
objectWriter.BuildCFIMap(factory, node);
}
// Build debug location map
objectWriter.BuildDebugLocInfoMap(node);
Relocation[] relocs = nodeContents.Relocs;
int nextRelocOffset = -1;
int nextRelocIndex = -1;
if (relocs.Length > 0)
{
nextRelocOffset = relocs[0].Offset;
nextRelocIndex = 0;
}
int i = 0;
listOfOffsets.Clear();
listOfOffsets.AddRange(objectWriter._byteInterruptionOffsets);
int offsetIndex = 0;
while (i < nodeContents.Data.Length)
{
// Emit symbol definitions if necessary
objectWriter.EmitSymbolDefinition(i);
// Emit CFI codes for the given offset.
objectWriter.EmitCFICodes(i);
// Emit debug loc info if needed.
objectWriter.EmitDebugLocInfo(i);
if (i == nextRelocOffset)
{
Relocation reloc = relocs[nextRelocIndex];
long delta;
unsafe
{
fixed(void *location = &nodeContents.Data[i])
{
delta = Relocation.ReadValue(reloc.RelocType, location);
}
}
int size = objectWriter.EmitSymbolReference(reloc.Target, (int)delta, reloc.RelocType);
// Emit a copy of original Thumb2 instruction that came from RyuJIT
if (reloc.RelocType == RelocType.IMAGE_REL_BASED_THUMB_MOV32 ||
reloc.RelocType == RelocType.IMAGE_REL_BASED_THUMB_BRANCH24)
{
unsafe
{
fixed(void *location = &nodeContents.Data[i])
{
objectWriter.EmitBytes((IntPtr)location, size);
}
}
}
// Update nextRelocIndex/Offset
if (++nextRelocIndex < relocs.Length)
{
nextRelocOffset = relocs[nextRelocIndex].Offset;
}
else
{
// This is the last reloc. Set the next reloc offset to -1 in case the last reloc has a zero size,
// which means the reloc does not have vacant bytes corresponding to in the data buffer. E.g,
// IMAGE_REL_THUMB_BRANCH24 is a kind of 24-bit reloc whose bits scatte over the instruction that
// references it. We do not vacate extra bytes in the data buffer for this kind of reloc.
nextRelocOffset = -1;
}
i += size;
}
else
{
while (offsetIndex < listOfOffsets.Count && listOfOffsets[offsetIndex] <= i)
{
offsetIndex++;
}
int nextOffset = offsetIndex == listOfOffsets.Count ? nodeContents.Data.Length : listOfOffsets[offsetIndex];
unsafe
{
// Todo: Use Span<T> instead once it's available to us in this repo
fixed(byte *pContents = &nodeContents.Data[i])
{
objectWriter.EmitBytes((IntPtr)(pContents), nextOffset - i);
i += nextOffset - i;
}
}
}
}
Debug.Assert(i == nodeContents.Data.Length);
// It is possible to have a symbol just after all of the data.
objectWriter.EmitSymbolDefinition(nodeContents.Data.Length);
// Publish Windows unwind info.
if (factory.Target.IsWindows)
{
objectWriter.PublishUnwindInfo(node);
}
// Emit the last CFI to close the frame.
objectWriter.EmitCFICodes(nodeContents.Data.Length);
if (objectWriter.HasFunctionDebugInfo())
{
if (factory.Target.OperatingSystem == TargetOS.Windows)
{
// Build debug local var info.
// It currently supports only Windows CodeView format.
objectWriter.EmitDebugVarInfo(node);
}
objectWriter.EmitDebugFunctionInfo(nodeContents.Data.Length);
}
}
objectWriter.EmitDebugModuleInfo();
succeeded = true;
}
finally
{
objectWriter.Dispose();
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(objectFilePath);
}
catch
{
}
}
}
}
public void EmitPortableExecutable()
{
bool succeeded = false;
FileStream mapFileStream = null;
TextWriter mapFile = null;
try
{
string mapFileName = Path.ChangeExtension(_objectFilePath, ".map");
mapFileStream = new FileStream(mapFileName, FileMode.Create, FileAccess.Write);
mapFile = new StreamWriter(mapFileStream);
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
mapFile.WriteLine($@"R2R object emission started: {DateTime.Now}");
R2RPEBuilder r2rPeBuilder = new R2RPEBuilder(
_nodeFactory.Target,
_inputPeReader,
GetRuntimeFunctionsTable);
int nodeIndex = -1;
foreach (var depNode in _nodes)
{
++nodeIndex;
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(_nodeFactory))
{
continue;
}
ObjectData nodeContents = node.GetData(_nodeFactory);
string name = null;
if (mapFile != null)
{
name = depNode.GetType().ToString();
int firstGeneric = name.IndexOf('[');
if (firstGeneric < 0)
{
firstGeneric = name.Length;
}
int lastDot = name.LastIndexOf('.', firstGeneric - 1, firstGeneric);
if (lastDot > 0)
{
name = name.Substring(lastDot + 1);
}
}
EmitObjectData(r2rPeBuilder, nodeContents, nodeIndex, name, node.Section, mapFile);
}
r2rPeBuilder.SetCorHeader(_nodeFactory.CopiedCorHeaderNode, _nodeFactory.CopiedCorHeaderNode.Size);
if (_nodeFactory.Win32ResourcesNode != null)
{
Debug.Assert(_nodeFactory.Win32ResourcesNode.Size != 0);
r2rPeBuilder.SetWin32Resources(_nodeFactory.Win32ResourcesNode, _nodeFactory.Win32ResourcesNode.Size);
}
using (var peStream = File.Create(_objectFilePath))
{
r2rPeBuilder.Write(peStream);
}
mapFile.WriteLine($@"R2R object emission finished: {DateTime.Now}, {stopwatch.ElapsedMilliseconds} msecs");
mapFile.Flush();
mapFileStream.Flush();
succeeded = true;
}
finally
{
if (mapFile != null)
{
mapFile.Dispose();
}
if (mapFileStream != null)
{
mapFileStream.Dispose();
}
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(_objectFilePath);
}
catch
{
}
}
}
}
public ISymbolNode ObjectAndOffset(ObjectNode obj, int offset, string name)
{
return(_internalSymbols.GetOrAdd(new Tuple <ObjectNode, int, string>(obj, offset, name)));
}
public ObjectAndOffsetSymbolNode(ObjectNode obj, int offset, string name)
{
_object = obj;
_offset = offset;
_name = name;
}
public void PublishUnwindInfo(ObjectNode node)
{
INodeWithCodeInfo nodeWithCodeInfo = node as INodeWithCodeInfo;
if (nodeWithCodeInfo == null)
{
return;
}
FrameInfo[] frameInfos = nodeWithCodeInfo.FrameInfos;
if (frameInfos == null)
{
return;
}
byte[] gcInfo = nodeWithCodeInfo.GCInfo;
ObjectData ehInfo = nodeWithCodeInfo.EHInfo;
for (int i = 0; i < frameInfos.Length; i++)
{
FrameInfo frameInfo = frameInfos[i];
int start = frameInfo.StartOffset;
int end = frameInfo.EndOffset;
int len = frameInfo.BlobData.Length;
byte[] blob = frameInfo.BlobData;
_sb.Clear().Append(_nodeFactory.NameMangler.CompilationUnitPrefix).Append("_unwind").Append(i.ToStringInvariant());
ObjectNodeSection section = ObjectNodeSection.XDataSection;
SwitchSection(_nativeObjectWriter, section.Name);
byte[] blobSymbolName = _sb.Append(_currentNodeZeroTerminatedName).ToUtf8String().UnderlyingArray;
EmitAlignment(4);
EmitSymbolDef(blobSymbolName);
FrameInfoFlags flags = frameInfo.Flags;
if (ehInfo != null)
{
flags |= FrameInfoFlags.HasEHInfo;
}
EmitBlob(blob);
EmitIntValue((byte)flags, 1);
if (ehInfo != null)
{
EmitSymbolRef(_sb.Clear().Append(_nodeFactory.NameMangler.CompilationUnitPrefix).Append("_ehInfo").Append(_currentNodeZeroTerminatedName), RelocType.IMAGE_REL_BASED_ABSOLUTE);
}
if (gcInfo != null)
{
EmitBlob(gcInfo);
gcInfo = null;
}
if (ehInfo != null)
{
// TODO: Place EHInfo into different section for better locality
Debug.Assert(ehInfo.Alignment == 1);
Debug.Assert(ehInfo.DefinedSymbols.Length == 0);
EmitSymbolDef(_sb /* ehInfo */);
EmitBlobWithRelocs(ehInfo.Data, ehInfo.Relocs);
ehInfo = null;
}
// For window, just emit the frame blob (UNWIND_INFO) as a whole.
EmitWinFrameInfo(start, end, len, blobSymbolName);
EnsureCurrentSection();
}
}
public void EmitPortableExecutable()
{
bool succeeded = false;
FileStream mapFileStream = null;
TextWriter mapFile = null;
try
{
if (_generateMapFile)
{
string mapFileName = Path.ChangeExtension(_objectFilePath, ".map");
mapFileStream = new FileStream(mapFileName, FileMode.Create, FileAccess.Write);
mapFile = new StreamWriter(mapFileStream);
}
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
if (mapFile != null)
{
mapFile.WriteLine($@"R2R object emission started: {DateTime.Now}");
}
R2RPEBuilder r2rPeBuilder = new R2RPEBuilder(
_nodeFactory.Target,
_inputPeReader,
GetRuntimeFunctionsTable);
NativeDebugDirectoryEntryNode nativeDebugDirectoryEntryNode = null;
int nodeIndex = -1;
foreach (var depNode in _nodes)
{
++nodeIndex;
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(_nodeFactory))
{
continue;
}
ObjectData nodeContents = node.GetData(_nodeFactory);
if (node is NativeDebugDirectoryEntryNode nddeNode)
{
// There should be only one NativeDebugDirectoryEntry.
// This assert will need to be revisited when we implement the composite R2R format, where we'll need to figure
// out how native symbols will be emitted, and verify that the DiaSymReader library is able to consume them.
Debug.Assert(nativeDebugDirectoryEntryNode == null);
nativeDebugDirectoryEntryNode = nddeNode;
}
string name = null;
if (mapFile != null)
{
name = depNode.GetType().ToString();
int firstGeneric = name.IndexOf('[');
if (firstGeneric < 0)
{
firstGeneric = name.Length;
}
int lastDot = name.LastIndexOf('.', firstGeneric - 1, firstGeneric);
if (lastDot > 0)
{
name = name.Substring(lastDot + 1);
}
}
EmitObjectData(r2rPeBuilder, nodeContents, nodeIndex, name, node.Section, mapFile);
}
r2rPeBuilder.SetCorHeader(_nodeFactory.CopiedCorHeaderNode, _nodeFactory.CopiedCorHeaderNode.Size);
r2rPeBuilder.SetDebugDirectory(_nodeFactory.DebugDirectoryNode, _nodeFactory.DebugDirectoryNode.Size);
if (_nodeFactory.Win32ResourcesNode != null)
{
Debug.Assert(_nodeFactory.Win32ResourcesNode.Size != 0);
r2rPeBuilder.SetWin32Resources(_nodeFactory.Win32ResourcesNode, _nodeFactory.Win32ResourcesNode.Size);
}
using (var peStream = File.Create(_objectFilePath))
{
r2rPeBuilder.Write(peStream);
// Compute MD5 hash of the output image and store that in the native DebugDirectory entry
using (var md5Hash = MD5.Create())
{
peStream.Seek(0, SeekOrigin.Begin);
byte[] hash = md5Hash.ComputeHash(peStream);
byte[] rsdsEntry = nativeDebugDirectoryEntryNode.GenerateRSDSEntryData(hash);
int offsetToUpdate = r2rPeBuilder.GetSymbolFilePosition(nativeDebugDirectoryEntryNode);
peStream.Seek(offsetToUpdate, SeekOrigin.Begin);
peStream.Write(rsdsEntry);
}
}
if (mapFile != null)
{
mapFile.WriteLine($@"R2R object emission finished: {DateTime.Now}, {stopwatch.ElapsedMilliseconds} msecs");
mapFile.Flush();
mapFileStream.Flush();
}
succeeded = true;
}
finally
{
if (mapFile != null)
{
mapFile.Dispose();
}
if (mapFileStream != null)
{
mapFileStream.Dispose();
}
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(_objectFilePath);
}
catch
{
}
}
}
}
public void StartObjectNode(ObjectNode node)
{
Debug.Assert(_currentObjectNode == null);
_currentObjectNode = node;
Debug.Assert(_currentObjectData.Count == 0);
}
public static void EmitObject(string objectFilePath, IEnumerable <DependencyNode> nodes, NodeFactory factory, WebAssemblyCodegenCompilation compilation, IObjectDumper dumper)
{
WebAssemblyObjectWriter objectWriter = new WebAssemblyObjectWriter(objectFilePath, factory, compilation);
bool succeeded = false;
try
{
objectWriter.EmitReadyToRunHeaderCallback(compilation.Module.Context);
//ObjectNodeSection managedCodeSection = null;
var listOfOffsets = new List <int>();
foreach (DependencyNode depNode in nodes)
{
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(factory))
{
continue;
}
if (node is ReadyToRunGenericHelperNode readyToRunGenericHelperNode)
{
objectWriter.GetCodeForReadyToRunGenericHelper(compilation, readyToRunGenericHelperNode, factory);
continue;
}
objectWriter.StartObjectNode(node);
ObjectData nodeContents = node.GetData(factory);
if (dumper != null)
{
dumper.DumpObjectNode(factory.NameMangler, node, nodeContents);
}
#if DEBUG
foreach (ISymbolNode definedSymbol in nodeContents.DefinedSymbols)
{
try
{
_previouslyWrittenNodeNames.Add(definedSymbol.GetMangledName(factory.NameMangler), definedSymbol);
}
catch (ArgumentException)
{
ISymbolNode alreadyWrittenSymbol = _previouslyWrittenNodeNames[definedSymbol.GetMangledName(factory.NameMangler)];
Debug.Fail("Duplicate node name emitted to file",
$"Symbol {definedSymbol.GetMangledName(factory.NameMangler)} has already been written to the output object file {objectFilePath} with symbol {alreadyWrittenSymbol}");
}
}
#endif
ObjectNodeSection section = node.Section;
if (objectWriter.ShouldShareSymbol(node))
{
section = objectWriter.GetSharedSection(section, ((ISymbolNode)node).GetMangledName(factory.NameMangler));
}
// Ensure section and alignment for the node.
objectWriter.SetSection(section);
objectWriter.EmitAlignment(nodeContents.Alignment);
objectWriter.ResetByteRunInterruptionOffsets(nodeContents.Relocs);
// Build symbol definition map.
objectWriter.BuildSymbolDefinitionMap(node, nodeContents.DefinedSymbols);
Relocation[] relocs = nodeContents.Relocs;
int nextRelocOffset = -1;
int nextRelocIndex = -1;
if (relocs.Length > 0)
{
nextRelocOffset = relocs[0].Offset;
nextRelocIndex = 0;
}
int i = 0;
listOfOffsets.Clear();
listOfOffsets.AddRange(objectWriter._byteInterruptionOffsets);
int offsetIndex = 0;
while (i < nodeContents.Data.Length)
{
// Emit symbol definitions if necessary
objectWriter.EmitSymbolDefinition(i);
if (i == nextRelocOffset)
{
Relocation reloc = relocs[nextRelocIndex];
long delta;
unsafe
{
fixed(void *location = &nodeContents.Data[i])
{
delta = Relocation.ReadValue(reloc.RelocType, location);
}
}
ISymbolNode symbolToWrite = reloc.Target;
var eeTypeNode = reloc.Target as EETypeNode;
if (eeTypeNode != null)
{
if (eeTypeNode.ShouldSkipEmittingObjectNode(factory))
{
symbolToWrite = factory.ConstructedTypeSymbol(eeTypeNode.Type);
}
}
int size = objectWriter.EmitSymbolReference(symbolToWrite, (int)delta, reloc.RelocType);
/*
* WebAssembly has no thumb
* // Emit a copy of original Thumb2 instruction that came from RyuJIT
* if (reloc.RelocType == RelocType.IMAGE_REL_BASED_THUMB_MOV32 ||
* reloc.RelocType == RelocType.IMAGE_REL_BASED_THUMB_BRANCH24)
* {
* unsafe
* {
* fixed (void* location = &nodeContents.Data[i])
* {
* objectWriter.EmitBytes((IntPtr)location, size);
* }
* }
* }*/
// Update nextRelocIndex/Offset
if (++nextRelocIndex < relocs.Length)
{
nextRelocOffset = relocs[nextRelocIndex].Offset;
}
else
{
// This is the last reloc. Set the next reloc offset to -1 in case the last reloc has a zero size,
// which means the reloc does not have vacant bytes corresponding to in the data buffer. E.g,
// IMAGE_REL_THUMB_BRANCH24 is a kind of 24-bit reloc whose bits scatte over the instruction that
// references it. We do not vacate extra bytes in the data buffer for this kind of reloc.
nextRelocOffset = -1;
}
i += size;
}
else
{
while (offsetIndex < listOfOffsets.Count && listOfOffsets[offsetIndex] <= i)
{
offsetIndex++;
}
int nextOffset = offsetIndex == listOfOffsets.Count ? nodeContents.Data.Length : listOfOffsets[offsetIndex];
unsafe
{
// Todo: Use Span<T> instead once it's available to us in this repo
fixed(byte *pContents = &nodeContents.Data[i])
{
objectWriter.EmitBytes((IntPtr)(pContents), nextOffset - i);
i += nextOffset - i;
}
}
}
}
Debug.Assert(i == nodeContents.Data.Length);
// It is possible to have a symbol just after all of the data.
objectWriter.EmitSymbolDefinition(nodeContents.Data.Length);
objectWriter.DoneObjectNode();
}
succeeded = true;
}
finally
{
objectWriter.Dispose();
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(objectFilePath);
}
catch
{
}
}
}
}
public void EmitPortableExecutable()
{
bool succeeded = false;
FileStream mapFileStream = null;
TextWriter mapFile = null;
try
{
string mapFileName = Path.ChangeExtension(_objectFilePath, ".map");
mapFileStream = new FileStream(mapFileName, FileMode.Create, FileAccess.Write);
mapFile = new StreamWriter(mapFileStream);
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
mapFile.WriteLine($@"R2R object emission started: {DateTime.Now}");
Machine targetMachine;
switch (_nodeFactory.Target.Architecture)
{
case Internal.TypeSystem.TargetArchitecture.X64:
targetMachine = Machine.Amd64;
break;
case Internal.TypeSystem.TargetArchitecture.X86:
targetMachine = Machine.I386;
break;
default:
throw new NotImplementedException(_nodeFactory.Target.Architecture.ToString());
}
R2RPEBuilder r2rPeBuilder = new R2RPEBuilder(
targetMachine,
_inputPeReader,
_nodeFactory.SectionStartNode,
GetRuntimeFunctionsTable);
int nodeIndex = -1;
foreach (var depNode in _nodes)
{
++nodeIndex;
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(_nodeFactory))
{
continue;
}
ObjectData nodeContents = node.GetData(_nodeFactory);
string name = null;
if (mapFile != null)
{
name = depNode.GetType().ToString();
int firstGeneric = name.IndexOf('[');
if (firstGeneric < 0)
{
firstGeneric = name.Length;
}
int lastDot = name.LastIndexOf('.', firstGeneric - 1, firstGeneric);
if (lastDot > 0)
{
name = name.Substring(lastDot + 1);
}
}
EmitObjectData(r2rPeBuilder, nodeContents, nodeIndex, name, node.Section, mapFile);
}
r2rPeBuilder.SetHeaderTable(_nodeFactory.Header, _nodeFactory.Header.GetData(_nodeFactory).Data.Length);
using (var peStream = File.Create(_objectFilePath))
{
r2rPeBuilder.Write(peStream);
// TODO: System.Reflection.Metadata doesn't currently support
// OS machine overrides. We cannot directly pass the xor-ed
// target machine to PEHeaderBuilder because it may incorrectly
// detect 32-bitness and emit wrong OptionalHeader.Magic.
const int DosHeaderSize = 0x80;
const int PESignatureSize = sizeof(uint);
byte[] patchedTargetMachine = BitConverter.GetBytes(
(ushort)unchecked ((ushort)targetMachine ^ (ushort)GetMachineOSOverride()));
Debug.Assert(patchedTargetMachine.Length == sizeof(ushort));
peStream.Seek(DosHeaderSize + PESignatureSize, SeekOrigin.Begin);
peStream.Write(patchedTargetMachine, 0, patchedTargetMachine.Length);
}
mapFile.WriteLine($@"R2R object emission finished: {DateTime.Now}, {stopwatch.ElapsedMilliseconds} msecs");
mapFile.Flush();
mapFileStream.Flush();
succeeded = true;
}
finally
{
if (mapFile != null)
{
mapFile.Dispose();
}
if (mapFileStream != null)
{
mapFileStream.Dispose();
}
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(_objectFilePath);
}
catch
{
}
}
}
}
public void EmitPortableExecutable()
{
bool succeeded = false;
try
{
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
PEHeaderBuilder headerBuilder;
int timeDateStamp;
ISymbolNode r2rHeaderExportSymbol;
if (_nodeFactory.CompilationModuleGroup.IsCompositeBuildMode && _componentModule == null)
{
headerBuilder = PEHeaderProvider.Create(
imageCharacteristics: Characteristics.ExecutableImage | Characteristics.Dll,
dllCharacteristics: default(DllCharacteristics),
Subsystem.Unknown,
_nodeFactory.Target);
// TODO: generate a non-zero timestamp: https://github.com/dotnet/runtime/issues/32507
timeDateStamp = 0;
r2rHeaderExportSymbol = _nodeFactory.Header;
}
else
{
PEReader inputPeReader = (_componentModule != null ? _componentModule.PEReader : _nodeFactory.CompilationModuleGroup.CompilationModuleSet.First().PEReader);
headerBuilder = PEHeaderProvider.Copy(inputPeReader.PEHeaders, _nodeFactory.Target);
timeDateStamp = inputPeReader.PEHeaders.CoffHeader.TimeDateStamp;
r2rHeaderExportSymbol = null;
}
Func <RuntimeFunctionsTableNode> getRuntimeFunctionsTable = null;
if (_componentModule == null)
{
getRuntimeFunctionsTable = GetRuntimeFunctionsTable;
}
R2RPEBuilder r2rPeBuilder = new R2RPEBuilder(
_nodeFactory.Target,
headerBuilder,
r2rHeaderExportSymbol,
Path.GetFileName(_objectFilePath),
getRuntimeFunctionsTable);
NativeDebugDirectoryEntryNode nativeDebugDirectoryEntryNode = null;
int nodeIndex = -1;
foreach (var depNode in _nodes)
{
++nodeIndex;
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(_nodeFactory))
{
continue;
}
ObjectData nodeContents = node.GetData(_nodeFactory);
if (node is NativeDebugDirectoryEntryNode nddeNode)
{
// There should be only one NativeDebugDirectoryEntry.
// This assert will need to be revisited when we implement the composite R2R format, where we'll need to figure
// out how native symbols will be emitted, and verify that the DiaSymReader library is able to consume them.
Debug.Assert(nativeDebugDirectoryEntryNode == null);
nativeDebugDirectoryEntryNode = nddeNode;
}
string name = null;
if (_mapFileBuilder != null)
{
name = depNode.GetType().ToString();
int firstGeneric = name.IndexOf('[');
if (firstGeneric < 0)
{
firstGeneric = name.Length;
}
int lastDot = name.LastIndexOf('.', firstGeneric - 1, firstGeneric);
if (lastDot > 0)
{
name = name.Substring(lastDot + 1);
}
}
EmitObjectData(r2rPeBuilder, nodeContents, nodeIndex, name, node.Section, _mapFileBuilder);
}
if (!_nodeFactory.CompilationModuleGroup.IsCompositeBuildMode || _componentModule != null)
{
r2rPeBuilder.SetCorHeader(_nodeFactory.CopiedCorHeaderNode, _nodeFactory.CopiedCorHeaderNode.Size);
r2rPeBuilder.SetDebugDirectory(_nodeFactory.DebugDirectoryNode, _nodeFactory.DebugDirectoryNode.Size);
}
if (_nodeFactory.Win32ResourcesNode != null)
{
Debug.Assert(_nodeFactory.Win32ResourcesNode.Size != 0);
r2rPeBuilder.SetWin32Resources(_nodeFactory.Win32ResourcesNode, _nodeFactory.Win32ResourcesNode.Size);
}
using (var peStream = File.Create(_objectFilePath))
{
r2rPeBuilder.Write(peStream, timeDateStamp);
if (_mapFileBuilder != null)
{
_mapFileBuilder.SetFileSize(peStream.Length);
}
// Compute MD5 hash of the output image and store that in the native DebugDirectory entry
using (var md5Hash = MD5.Create())
{
peStream.Seek(0, SeekOrigin.Begin);
byte[] hash = md5Hash.ComputeHash(peStream);
byte[] rsdsEntry = nativeDebugDirectoryEntryNode.GenerateRSDSEntryData(hash);
int offsetToUpdate = r2rPeBuilder.GetSymbolFilePosition(nativeDebugDirectoryEntryNode);
peStream.Seek(offsetToUpdate, SeekOrigin.Begin);
peStream.Write(rsdsEntry);
}
}
if (_mapFileBuilder != null)
{
r2rPeBuilder.AddSections(_mapFileBuilder);
string mapFileName = Path.ChangeExtension(_objectFilePath, ".map");
_mapFileBuilder.Save(mapFileName);
}
succeeded = true;
}
finally
{
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(_objectFilePath);
}
catch
{
}
}
}
}
public static void EmitObject(string objectFilePath, IEnumerable <DependencyNode> nodes, NodeFactory factory)
{
using (ObjectWriter objectWriter = new ObjectWriter(objectFilePath, factory))
{
// TODO: Exception handling on Unix
if (factory.Target.IsWindows)
{
objectWriter.CreateCustomSection(MethodCodeNode.ContentSection);
// Emit sentinels for managed code section.
ObjectNodeSection codeStartSection = factory.CompilationModuleGroup.IsSingleFileCompilation ? MethodCodeNode.StartSection : MethodCodeNode.StartSection.GetSharedSection("__managedcode_a");
objectWriter.SetSection(codeStartSection);
objectWriter.EmitSymbolDef("__managedcode_a");
objectWriter.EmitIntValue(0, 1);
ObjectNodeSection codeEndSection = factory.CompilationModuleGroup.IsSingleFileCompilation ? MethodCodeNode.EndSection : MethodCodeNode.EndSection.GetSharedSection("__managedcode_z");
objectWriter.SetSection(codeEndSection);
objectWriter.EmitSymbolDef("__managedcode_z");
objectWriter.EmitIntValue(0, 1);
}
// Build file info map.
objectWriter.BuildFileInfoMap(nodes);
foreach (DependencyNode depNode in nodes)
{
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(factory))
{
continue;
}
#if DEBUG
Debug.Assert(_previouslyWrittenNodeNames.Add(node.GetName()), "Duplicate node name emitted to file", "Node {0} has already been written to the output object file {1}", node.GetName(), objectFilePath);
#endif
ObjectNode.ObjectData nodeContents = node.GetData(factory);
ObjectNodeSection section = node.Section;
if (node.ShouldShareNodeAcrossModules(factory) && factory.Target.OperatingSystem == TargetOS.Windows)
{
Debug.Assert(node is ISymbolNode);
section = section.GetSharedSection(((ISymbolNode)node).MangledName);
}
// Ensure section and alignment for the node.
objectWriter.SetSection(section);
objectWriter.EmitAlignment(nodeContents.Alignment);
// Build symbol definition map.
objectWriter.BuildSymbolDefinitionMap(node, nodeContents.DefinedSymbols);
// Build CFI map (Unix) or publish unwind blob (Windows).
objectWriter.BuildCFIMap(factory, node);
// Build debug location map
objectWriter.BuildDebugLocInfoMap(node);
Relocation[] relocs = nodeContents.Relocs;
int nextRelocOffset = -1;
int nextRelocIndex = -1;
if (relocs.Length > 0)
{
nextRelocOffset = relocs[0].Offset;
nextRelocIndex = 0;
}
int i = 0;
while (i < nodeContents.Data.Length)
{
// Emit symbol definitions if necessary
objectWriter.EmitSymbolDefinition(i);
// Emit CFI codes for the given offset.
objectWriter.EmitCFICodes(i);
// Emit debug loc info if needed.
objectWriter.EmitDebugLocInfo(i);
if (i == nextRelocOffset)
{
Relocation reloc = relocs[nextRelocIndex];
int size = objectWriter.EmitSymbolReference(reloc.Target, reloc.Delta, reloc.RelocType);
// Update nextRelocIndex/Offset
if (++nextRelocIndex < relocs.Length)
{
nextRelocOffset = relocs[nextRelocIndex].Offset;
}
i += size;
}
else
{
objectWriter.EmitIntValue(nodeContents.Data[i], 1);
i++;
}
}
// It is possible to have a symbol just after all of the data.
objectWriter.EmitSymbolDefinition(nodeContents.Data.Length);
// Emit the last CFI to close the frame.
objectWriter.EmitCFICodes(nodeContents.Data.Length);
if (objectWriter.HasFunctionDebugInfo())
{
// Build debug local var info
objectWriter.EmitDebugVarInfo(node);
objectWriter.EmitDebugFunctionInfo(nodeContents.Data.Length);
}
}
objectWriter.EmitDebugModuleInfo();
}
}
public void BuildCFIMap(NodeFactory factory, ObjectNode node)
{
_offsetToCfis.Clear();
_offsetToCfiStart.Clear();
_offsetToCfiEnd.Clear();
_frameOpened = false;
INodeWithCodeInfo nodeWithCodeInfo = node as INodeWithCodeInfo;
if (nodeWithCodeInfo == null)
{
return;
}
FrameInfo[] frameInfos = nodeWithCodeInfo.FrameInfos;
if (frameInfos == null)
{
return;
}
ObjectNode.ObjectData ehInfo = nodeWithCodeInfo.EHInfo;
int i = 0;
foreach (var frameInfo in frameInfos)
{
int start = frameInfo.StartOffset;
int end = frameInfo.EndOffset;
int len = frameInfo.BlobData.Length;
byte[] blob = frameInfo.BlobData;
if (_targetPlatform.OperatingSystem == TargetOS.Windows)
{
string blobSymbolName = "_unwind" + (i++).ToStringInvariant() + _currentNodeName;
ObjectNodeSection section = ObjectNodeSection.XDataSection;
if (node.ShouldShareNodeAcrossModules(factory) && factory.Target.OperatingSystem == TargetOS.Windows)
{
section = section.GetSharedSection(blobSymbolName);
CreateCustomSection(section);
}
SwitchSection(_nativeObjectWriter, section.Name);
EmitAlignment(4);
EmitSymbolDef(blobSymbolName);
if (ehInfo != null)
{
blob[blob.Length - 1] |= 0x04; // Flag to indicate that EHClauses follows
}
EmitBlob(blob);
if (ehInfo != null)
{
Debug.Assert(ehInfo.Alignment == 1);
Debug.Assert(ehInfo.DefinedSymbols.Length == 0);
EmitBlobWithRelocs(ehInfo.Data, ehInfo.Relocs);
ehInfo = null;
}
// TODO: Currently we get linker errors if we emit frame info for shared types.
// This needs follow-up investigation.
if (!node.ShouldShareNodeAcrossModules(factory))
{
// For window, just emit the frame blob (UNWIND_INFO) as a whole.
EmitWinFrameInfo(start, end, len, blobSymbolName);
}
EnsureCurrentSection();
}
else
{
// For Unix, we build CFI blob map for each offset.
Debug.Assert(len % CfiCodeSize == 0);
// Record start/end of frames which shouldn't be overlapped.
_offsetToCfiStart.Add(start);
_offsetToCfiEnd.Add(end);
for (int j = 0; j < len; j += CfiCodeSize)
{
// The first byte of CFI_CODE is offset from the range the frame covers.
// Compute code offset from the root method.
int codeOffset = blob[j] + start;
List <byte[]> cfis;
if (!_offsetToCfis.TryGetValue(codeOffset, out cfis))
{
cfis = new List <byte[]>();
_offsetToCfis.Add(codeOffset, cfis);
}
byte[] cfi = new byte[CfiCodeSize];
Array.Copy(blob, j, cfi, 0, CfiCodeSize);
cfis.Add(cfi);
}
}
}
}
public static void EmitObject(string objectFilePath, IEnumerable <DependencyNode> nodes, NodeFactory factory)
{
ObjectWriter objectWriter = new ObjectWriter(objectFilePath, factory);
bool succeeded = false;
try
{
if (factory.Target.OperatingSystem == TargetOS.Windows)
{
objectWriter.CreateCustomSection(MethodCodeNode.WindowsContentSection);
// Emit sentinels for managed code section.
ObjectNodeSection codeStartSection = factory.CompilationModuleGroup.IsSingleFileCompilation ?
MethodCodeNode.StartSection :
MethodCodeNode.StartSection.GetSharedSection("__managedcode_a");
objectWriter.SetSection(codeStartSection);
objectWriter.EmitSymbolDef(new Utf8StringBuilder().Append("__managedcode_a"));
objectWriter.EmitIntValue(0, 1);
ObjectNodeSection codeEndSection = factory.CompilationModuleGroup.IsSingleFileCompilation ?
MethodCodeNode.EndSection :
MethodCodeNode.EndSection.GetSharedSection("__managedcode_z");
objectWriter.SetSection(codeEndSection);
objectWriter.EmitSymbolDef(new Utf8StringBuilder().Append("__managedcode_z"));
objectWriter.EmitIntValue(0, 1);
}
else
{
objectWriter.CreateCustomSection(MethodCodeNode.UnixContentSection);
objectWriter.CreateCustomSection(LsdaSection);
}
// Build file info map.
objectWriter.BuildFileInfoMap(nodes);
foreach (DependencyNode depNode in nodes)
{
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(factory))
{
continue;
}
ObjectNode.ObjectData nodeContents = node.GetData(factory);
#if DEBUG
foreach (ISymbolNode definedSymbol in nodeContents.DefinedSymbols)
{
Debug.Assert(_previouslyWrittenNodeNames.Add(definedSymbol.GetMangledName()), "Duplicate node name emitted to file",
$"Symbol {definedSymbol.GetMangledName()} has already been written to the output object file {objectFilePath}");
}
#endif
ObjectNodeSection section = node.Section;
if (objectWriter.ShouldShareSymbol(node))
{
section = section.GetSharedSection(((ISymbolNode)node).GetMangledName());
}
// Ensure section and alignment for the node.
objectWriter.SetSection(section);
objectWriter.EmitAlignment(nodeContents.Alignment);
// Build symbol definition map.
objectWriter.BuildSymbolDefinitionMap(node, nodeContents.DefinedSymbols);
// Build CFI map (Unix) or publish unwind blob (Windows).
objectWriter.BuildCFIMap(factory, node);
// Build debug location map
objectWriter.BuildDebugLocInfoMap(node);
Relocation[] relocs = nodeContents.Relocs;
int nextRelocOffset = -1;
int nextRelocIndex = -1;
if (relocs.Length > 0)
{
nextRelocOffset = relocs[0].Offset;
nextRelocIndex = 0;
}
int i = 0;
while (i < nodeContents.Data.Length)
{
// Emit symbol definitions if necessary
objectWriter.EmitSymbolDefinition(i);
// Emit CFI codes for the given offset.
objectWriter.EmitCFICodes(i);
// Emit debug loc info if needed.
objectWriter.EmitDebugLocInfo(i);
if (i == nextRelocOffset)
{
Relocation reloc = relocs[nextRelocIndex];
long delta;
unsafe
{
fixed(void *location = &nodeContents.Data[i])
{
delta = Relocation.ReadValue(reloc.RelocType, location);
}
}
int size = objectWriter.EmitSymbolReference(reloc.Target, (int)delta, reloc.RelocType);
// Update nextRelocIndex/Offset
if (++nextRelocIndex < relocs.Length)
{
nextRelocOffset = relocs[nextRelocIndex].Offset;
}
i += size;
}
else
{
objectWriter.EmitIntValue(nodeContents.Data[i], 1);
i++;
}
}
// It is possible to have a symbol just after all of the data.
objectWriter.EmitSymbolDefinition(nodeContents.Data.Length);
// Emit the last CFI to close the frame.
objectWriter.EmitCFICodes(nodeContents.Data.Length);
if (objectWriter.HasFunctionDebugInfo())
{
// Build debug local var info
objectWriter.EmitDebugVarInfo(node);
objectWriter.EmitDebugFunctionInfo(nodeContents.Data.Length);
}
}
objectWriter.EmitDebugModuleInfo();
succeeded = true;
}
finally
{
objectWriter.Dispose();
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(objectFilePath);
}
catch
{
}
}
}
}
public void EmitPortableExecutable()
{
bool succeeded = false;
try
{
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
PEHeaderBuilder headerBuilder;
int? timeDateStamp;
ISymbolNode r2rHeaderExportSymbol;
Func <IEnumerable <Blob>, BlobContentId> peIdProvider = null;
if (_nodeFactory.CompilationModuleGroup.IsCompositeBuildMode && _componentModule == null)
{
headerBuilder = PEHeaderProvider.Create(
imageCharacteristics: Characteristics.ExecutableImage | Characteristics.Dll,
dllCharacteristics: default(DllCharacteristics),
Subsystem.Unknown,
_nodeFactory.Target);
peIdProvider = new Func <IEnumerable <Blob>, BlobContentId>(content => BlobContentId.FromHash(CryptographicHashProvider.ComputeSourceHash(content)));
timeDateStamp = null;
r2rHeaderExportSymbol = _nodeFactory.Header;
}
else
{
PEReader inputPeReader = (_componentModule != null ? _componentModule.PEReader : _nodeFactory.CompilationModuleGroup.CompilationModuleSet.First().PEReader);
headerBuilder = PEHeaderProvider.Copy(inputPeReader.PEHeaders, _nodeFactory.Target);
timeDateStamp = inputPeReader.PEHeaders.CoffHeader.TimeDateStamp;
r2rHeaderExportSymbol = null;
}
Func <RuntimeFunctionsTableNode> getRuntimeFunctionsTable = null;
if (_componentModule == null)
{
getRuntimeFunctionsTable = GetRuntimeFunctionsTable;
}
R2RPEBuilder r2rPeBuilder = new R2RPEBuilder(
_nodeFactory.Target,
headerBuilder,
r2rHeaderExportSymbol,
Path.GetFileName(_objectFilePath),
getRuntimeFunctionsTable,
_customPESectionAlignment,
peIdProvider);
NativeDebugDirectoryEntryNode nativeDebugDirectoryEntryNode = null;
ISymbolDefinitionNode firstImportThunk = null;
ISymbolDefinitionNode lastImportThunk = null;
ObjectNode lastWrittenObjectNode = null;
int nodeIndex = -1;
foreach (var depNode in _nodes)
{
++nodeIndex;
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(_nodeFactory))
{
continue;
}
ObjectData nodeContents = node.GetData(_nodeFactory);
if (node is NativeDebugDirectoryEntryNode nddeNode)
{
// There should be only one NativeDebugDirectoryEntry.
Debug.Assert(nativeDebugDirectoryEntryNode == null);
nativeDebugDirectoryEntryNode = nddeNode;
}
if (node is ImportThunk importThunkNode)
{
Debug.Assert(firstImportThunk == null || lastWrittenObjectNode is ImportThunk,
"All the import thunks must be in single contiguous run");
if (firstImportThunk == null)
{
firstImportThunk = importThunkNode;
}
lastImportThunk = importThunkNode;
}
string name = null;
if (_mapFileBuilder != null)
{
name = depNode.GetType().ToString();
int firstGeneric = name.IndexOf('[');
if (firstGeneric < 0)
{
firstGeneric = name.Length;
}
int lastDot = name.LastIndexOf('.', firstGeneric - 1, firstGeneric);
if (lastDot > 0)
{
name = name.Substring(lastDot + 1);
}
}
EmitObjectData(r2rPeBuilder, nodeContents, nodeIndex, name, node.Section);
lastWrittenObjectNode = node;
if (_outputInfoBuilder != null && node is MethodWithGCInfo methodNode)
{
_outputInfoBuilder.AddMethod(methodNode, nodeContents.DefinedSymbols[0]);
}
}
r2rPeBuilder.SetCorHeader(_nodeFactory.CopiedCorHeaderNode, _nodeFactory.CopiedCorHeaderNode.Size);
r2rPeBuilder.SetDebugDirectory(_nodeFactory.DebugDirectoryNode, _nodeFactory.DebugDirectoryNode.Size);
if (firstImportThunk != null)
{
r2rPeBuilder.AddSymbolForRange(_nodeFactory.DelayLoadMethodCallThunks, firstImportThunk, lastImportThunk);
}
if (_nodeFactory.Win32ResourcesNode != null)
{
Debug.Assert(_nodeFactory.Win32ResourcesNode.Size != 0);
r2rPeBuilder.SetWin32Resources(_nodeFactory.Win32ResourcesNode, _nodeFactory.Win32ResourcesNode.Size);
}
using (var peStream = File.Create(_objectFilePath))
{
r2rPeBuilder.Write(peStream, timeDateStamp);
if (_mapFileBuilder != null)
{
_mapFileBuilder.SetFileSize(peStream.Length);
}
// Compute MD5 hash of the output image and store that in the native DebugDirectory entry
using (var md5Hash = MD5.Create())
{
peStream.Seek(0, SeekOrigin.Begin);
byte[] hash = md5Hash.ComputeHash(peStream);
byte[] rsdsEntry = nativeDebugDirectoryEntryNode.GenerateRSDSEntryData(hash);
int offsetToUpdate = r2rPeBuilder.GetSymbolFilePosition(nativeDebugDirectoryEntryNode);
peStream.Seek(offsetToUpdate, SeekOrigin.Begin);
peStream.Write(rsdsEntry);
}
}
if (_outputInfoBuilder != null)
{
r2rPeBuilder.AddSections(_outputInfoBuilder);
if (_generateMapFile)
{
string mapFileName = Path.ChangeExtension(_objectFilePath, ".map");
_mapFileBuilder.SaveMap(mapFileName);
}
if (_generateMapCsvFile)
{
string nodeStatsCsvFileName = Path.ChangeExtension(_objectFilePath, ".nodestats.csv");
string mapCsvFileName = Path.ChangeExtension(_objectFilePath, ".map.csv");
_mapFileBuilder.SaveCsv(nodeStatsCsvFileName, mapCsvFileName);
}
if (_generatePdbFile)
{
string path = _pdbPath;
if (string.IsNullOrEmpty(path))
{
path = Path.GetDirectoryName(_objectFilePath);
}
_symbolFileBuilder.SavePdb(path, _objectFilePath);
}
if (_generatePerfMapFile)
{
string path = _perfMapPath;
if (string.IsNullOrEmpty(path))
{
path = Path.GetDirectoryName(_objectFilePath);
}
_symbolFileBuilder.SavePerfMap(path, _objectFilePath);
}
if (_profileFileBuilder != null)
{
string path = Path.ChangeExtension(_objectFilePath, ".profile");
_profileFileBuilder.SaveProfile(path);
}
}
succeeded = true;
}
finally
{
if (!succeeded)
{
// If there was an exception while generating the OBJ file, make sure we don't leave the unfinished
// object file around.
try
{
File.Delete(_objectFilePath);
}
catch
{
}
}
}
}
public void Add(ReadyToRunSectionType id, ObjectNode node, ISymbolNode startSymbol, ISymbolNode endSymbol = null)
{
_items.Add(new HeaderItem(id, node, startSymbol, endSymbol));
}
public static void EmitObject(string OutputPath, IEnumerable <DependencyNode> nodes, NodeFactory factory)
{
using (ObjectWriter objectWriter = new ObjectWriter(OutputPath))
{
string currentSection = "";
// Build file info map.
string[] debugFileInfos = objectWriter.BuildFileInfoMap(nodes);
if (debugFileInfos != null)
{
objectWriter.EmitDebugFileInfo(debugFileInfos.Length, debugFileInfos);
}
foreach (DependencyNode depNode in nodes)
{
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(factory))
{
continue;
}
ObjectNode.ObjectData nodeContents = node.GetData(factory);
if (currentSection != node.Section)
{
currentSection = node.Section;
objectWriter.SwitchSection(currentSection);
}
objectWriter.EmitAlignment(nodeContents.Alignment);
Relocation[] relocs = nodeContents.Relocs;
int nextRelocOffset = -1;
int nextRelocIndex = -1;
if (relocs != null && relocs.Length > 0)
{
nextRelocOffset = relocs[0].Offset;
nextRelocIndex = 0;
}
// Build symbol definition map.
objectWriter.BuildSymbolDefinitionMap(nodeContents.DefinedSymbols);
// Build debug location map
objectWriter.BuildDebugLocInfoMap(node);
for (int i = 0; i < nodeContents.Data.Length; i++)
{
// Emit symbol definitions if necessary
objectWriter.EmitSymbolDefinition(i, factory);
// Emit debug loc info if needed.
objectWriter.EmitDebugLocInfo(i);
if (i == nextRelocOffset)
{
Relocation reloc = relocs[nextRelocIndex];
ISymbolNode target = reloc.Target;
string targetName = target.MangledName;
int size = 0;
bool isPCRelative = false;
switch (reloc.RelocType)
{
case RelocType.IMAGE_REL_BASED_DIR64:
size = 8;
break;
case RelocType.IMAGE_REL_BASED_REL32:
size = 4;
isPCRelative = true;
break;
default:
throw new NotImplementedException();
}
// Emit symbol reference
objectWriter.EmitSymbolRef(targetName, size, isPCRelative, reloc.Delta);
// Update nextRelocIndex/Offset
if (++nextRelocIndex < relocs.Length)
{
nextRelocOffset = relocs[nextRelocIndex].Offset;
}
i += size - 1;
continue;
}
objectWriter.EmitIntValue(nodeContents.Data[i], 1);
}
// It is possible to have a symbol just after all of the data.
objectWriter.EmitSymbolDefinition(nodeContents.Data.Length, factory);
// The first definition is the main node name
string nodeName = objectWriter._offsetToDefSymbol[0][0].MangledName;
// Emit frame info for object code.
if (node is INodeWithFrameInfo)
{
FrameInfo[] frameInfos = ((INodeWithFrameInfo)node).FrameInfos;
if (frameInfos != null)
{
foreach (var frameInfo in frameInfos)
{
objectWriter.EmitFrameInfo(nodeName,
frameInfo.StartOffset,
frameInfo.EndOffset,
frameInfo.BlobData.Length,
frameInfo.BlobData);
}
}
}
objectWriter.FlushDebugLocs(nodeName, nodeContents.Data.Length);
objectWriter.SwitchSection(currentSection);
}
}
}
public static void EmitObject(string objectFilePath, IEnumerable <DependencyNode> nodes, NodeFactory factory)
{
using (ObjectWriter objectWriter = new ObjectWriter(objectFilePath, factory))
{
// Build file info map.
string[] debugFileInfos = objectWriter.BuildFileInfoMap(nodes);
if (debugFileInfos != null)
{
objectWriter.EmitDebugFileInfo(debugFileInfos.Length, debugFileInfos);
}
foreach (DependencyNode depNode in nodes)
{
ObjectNode node = depNode as ObjectNode;
if (node == null)
{
continue;
}
if (node.ShouldSkipEmittingObjectNode(factory))
{
continue;
}
#if DEBUG
Debug.Assert(_previouslyWrittenNodeNames.Add(node.GetName()), "Duplicate node name emitted to file", "Node {0} has already been written to the output object file {1}", node.GetName(), objectFilePath);
#endif
ObjectNode.ObjectData nodeContents = node.GetData(factory);
// Ensure section and alignment for the node.
objectWriter.SetSection(node.Section);
objectWriter.EmitAlignment(nodeContents.Alignment);
Relocation[] relocs = nodeContents.Relocs;
int nextRelocOffset = -1;
int nextRelocIndex = -1;
if (relocs != null && relocs.Length > 0)
{
nextRelocOffset = relocs[0].Offset;
nextRelocIndex = 0;
}
// Build symbol definition map.
objectWriter.BuildSymbolDefinitionMap(nodeContents.DefinedSymbols);
// Build CFI map (Unix) or publish unwind blob (Windows).
objectWriter.BuildCFIMap(node);
// Build debug location map
objectWriter.BuildDebugLocInfoMap(node);
for (int i = 0; i < nodeContents.Data.Length; i++)
{
// Emit symbol definitions if necessary
objectWriter.EmitSymbolDefinition(i);
// Emit CFI codes for the given offset.
objectWriter.EmitCFICodes(i);
// Emit debug loc info if needed.
objectWriter.EmitDebugLocInfo(i);
if (i == nextRelocOffset)
{
Relocation reloc = relocs[nextRelocIndex];
ISymbolNode target = reloc.Target;
string targetName = objectWriter.GetSymbolToEmitForTargetPlatform(target.MangledName);
int size = 0;
bool isPCRelative = false;
switch (reloc.RelocType)
{
case RelocType.IMAGE_REL_BASED_DIR64:
size = 8;
break;
case RelocType.IMAGE_REL_BASED_REL32:
size = 4;
isPCRelative = true;
break;
default:
throw new NotImplementedException();
}
// Emit symbol reference
objectWriter.EmitSymbolRef(targetName, size, isPCRelative, reloc.Delta);
// Update nextRelocIndex/Offset
if (++nextRelocIndex < relocs.Length)
{
nextRelocOffset = relocs[nextRelocIndex].Offset;
}
i += size - 1;
continue;
}
objectWriter.EmitIntValue(nodeContents.Data[i], 1);
}
// It is possible to have a symbol just after all of the data.
objectWriter.EmitSymbolDefinition(nodeContents.Data.Length);
// Emit the last CFI to close the frame.
objectWriter.EmitCFICodes(nodeContents.Data.Length);
objectWriter.FlushDebugLocs(nodeContents.Data.Length);
}
}
}
public void BuildCFIMap(NodeFactory factory, ObjectNode node)
{
_offsetToCfis.Clear();
_offsetToCfiStart.Clear();
_offsetToCfiEnd.Clear();
_offsetToCfiLsdaBlobName.Clear();
_frameOpened = false;
INodeWithCodeInfo nodeWithCodeInfo = node as INodeWithCodeInfo;
if (nodeWithCodeInfo == null)
{
return;
}
FrameInfo[] frameInfos = nodeWithCodeInfo.FrameInfos;
if (frameInfos == null)
{
return;
}
byte[] gcInfo = nodeWithCodeInfo.GCInfo;
ObjectData ehInfo = nodeWithCodeInfo.EHInfo;
for (int i = 0; i < frameInfos.Length; i++)
{
FrameInfo frameInfo = frameInfos[i];
int start = frameInfo.StartOffset;
int end = frameInfo.EndOffset;
int len = frameInfo.BlobData.Length;
byte[] blob = frameInfo.BlobData;
ObjectNodeSection lsdaSection = LsdaSection;
if (ShouldShareSymbol(node))
{
lsdaSection = lsdaSection.GetSharedSection(((ISymbolNode)node).GetMangledName(_nodeFactory.NameMangler));
}
SwitchSection(_nativeObjectWriter, lsdaSection.Name, GetCustomSectionAttributes(lsdaSection), lsdaSection.ComdatName);
_sb.Clear().Append("_lsda").Append(i.ToStringInvariant()).Append(_currentNodeZeroTerminatedName);
byte[] blobSymbolName = _sb.ToUtf8String().UnderlyingArray;
EmitSymbolDef(blobSymbolName);
FrameInfoFlags flags = frameInfo.Flags;
if (ehInfo != null)
{
flags |= FrameInfoFlags.HasEHInfo;
}
EmitIntValue((byte)flags, 1);
if (i != 0)
{
EmitSymbolRef(_sb.Clear().Append("_lsda0").Append(_currentNodeZeroTerminatedName), RelocType.IMAGE_REL_BASED_RELPTR32);
// emit relative offset from the main function
EmitIntValue((ulong)(start - frameInfos[0].StartOffset), 4);
}
if (ehInfo != null)
{
EmitSymbolRef(_sb.Clear().Append("_ehInfo").Append(_currentNodeZeroTerminatedName), RelocType.IMAGE_REL_BASED_RELPTR32);
}
if (gcInfo != null)
{
EmitBlob(gcInfo);
gcInfo = null;
}
if (ehInfo != null)
{
// TODO: Place EHInfo into different section for better locality
Debug.Assert(ehInfo.Alignment == 1);
Debug.Assert(ehInfo.DefinedSymbols.Length == 0);
EmitSymbolDef(_sb /* ehInfo */);
EmitBlobWithRelocs(ehInfo.Data, ehInfo.Relocs);
ehInfo = null;
}
// For Unix, we build CFI blob map for each offset.
Debug.Assert(len % CfiCodeSize == 0);
// Record start/end of frames which shouldn't be overlapped.
_offsetToCfiStart.Add(start);
_offsetToCfiEnd.Add(end);
_offsetToCfiLsdaBlobName.Add(start, blobSymbolName);
for (int j = 0; j < len; j += CfiCodeSize)
{
// The first byte of CFI_CODE is offset from the range the frame covers.
// Compute code offset from the root method.
int codeOffset = blob[j] + start;
List <byte[]> cfis;
if (!_offsetToCfis.TryGetValue(codeOffset, out cfis))
{
cfis = new List <byte[]>();
_offsetToCfis.Add(codeOffset, cfis);
}
byte[] cfi = new byte[CfiCodeSize];
Array.Copy(blob, j, cfi, 0, CfiCodeSize);
cfis.Add(cfi);
}
}
EnsureCurrentSection();
}
public void BuildCFIMap(NodeFactory factory, ObjectNode node)
{
_offsetToCfis.Clear();
_offsetToCfiStart.Clear();
_offsetToCfiEnd.Clear();
_offsetToCfiLsdaBlobName.Clear();
_frameOpened = false;
INodeWithCodeInfo nodeWithCodeInfo = node as INodeWithCodeInfo;
if (nodeWithCodeInfo == null)
{
return;
}
FrameInfo[] frameInfos = nodeWithCodeInfo.FrameInfos;
if (frameInfos == null)
{
return;
}
byte[] gcInfo = nodeWithCodeInfo.GCInfo;
ObjectNode.ObjectData ehInfo = nodeWithCodeInfo.EHInfo;
string mainEhInfoSymbolName = null;
for (int i = 0; i < frameInfos.Length; i++)
{
FrameInfo frameInfo = frameInfos[i];
int start = frameInfo.StartOffset;
int end = frameInfo.EndOffset;
int len = frameInfo.BlobData.Length;
byte[] blob = frameInfo.BlobData;
if (_targetPlatform.OperatingSystem == TargetOS.Windows)
{
string blobSymbolName = "_unwind" + i.ToStringInvariant() + _currentNodeName;
ObjectNodeSection section = ObjectNodeSection.XDataSection;
if (node.ShouldShareNodeAcrossModules(factory) && factory.Target.OperatingSystem == TargetOS.Windows)
{
section = section.GetSharedSection(blobSymbolName);
CreateCustomSection(section);
}
SwitchSection(_nativeObjectWriter, section.Name);
EmitAlignment(4);
EmitSymbolDef(blobSymbolName);
FrameInfoFlags flags = frameInfo.Flags;
if (ehInfo != null)
{
flags |= FrameInfoFlags.HasEHInfo;
}
EmitBlob(blob);
EmitIntValue((byte)flags, 1);
if (ehInfo != null)
{
mainEhInfoSymbolName = "_ehInfo" + _currentNodeName;
EmitSymbolRef(mainEhInfoSymbolName, RelocType.IMAGE_REL_BASED_ABSOLUTE);
}
if (gcInfo != null)
{
EmitBlob(gcInfo);
gcInfo = null;
}
if (ehInfo != null)
{
// TODO: Place EHInfo into different section for better locality
Debug.Assert(ehInfo.Alignment == 1);
Debug.Assert(ehInfo.DefinedSymbols.Length == 0);
EmitSymbolDef(mainEhInfoSymbolName);
EmitBlobWithRelocs(ehInfo.Data, ehInfo.Relocs);
ehInfo = null;
}
// TODO: Currently we get linker errors if we emit frame info for shared types.
// This needs follow-up investigation.
if (!node.ShouldShareNodeAcrossModules(factory))
{
// For window, just emit the frame blob (UNWIND_INFO) as a whole.
EmitWinFrameInfo(start, end, len, blobSymbolName);
}
}
else
{
string blobSymbolName = "_lsda" + i.ToStringInvariant() + _currentNodeName;
SwitchSection(_nativeObjectWriter, LsdaSection.Name);
EmitSymbolDef(blobSymbolName);
FrameInfoFlags flags = frameInfo.Flags;
if (ehInfo != null)
{
flags |= FrameInfoFlags.HasEHInfo;
}
EmitIntValue((byte)flags, 1);
if (i != 0)
{
EmitSymbolRef("_lsda0" + _currentNodeName, RelocType.IMAGE_REL_BASED_REL32, 4);
// emit relative offset from the main function
EmitIntValue((ulong)(start - frameInfos[0].StartOffset), 4);
}
if (ehInfo != null)
{
mainEhInfoSymbolName = "_ehInfo" + _currentNodeName;
EmitSymbolRef(mainEhInfoSymbolName, RelocType.IMAGE_REL_BASED_REL32, 4);
}
if (gcInfo != null)
{
EmitBlob(gcInfo);
gcInfo = null;
}
if (ehInfo != null)
{
// TODO: Place EHInfo into different section for better locality
Debug.Assert(ehInfo.Alignment == 1);
Debug.Assert(ehInfo.DefinedSymbols.Length == 0);
EmitSymbolDef(mainEhInfoSymbolName);
EmitBlobWithRelocs(ehInfo.Data, ehInfo.Relocs);
ehInfo = null;
}
// For Unix, we build CFI blob map for each offset.
Debug.Assert(len % CfiCodeSize == 0);
// Record start/end of frames which shouldn't be overlapped.
_offsetToCfiStart.Add(start);
_offsetToCfiEnd.Add(end);
_offsetToCfiLsdaBlobName.Add(start, blobSymbolName);
for (int j = 0; j < len; j += CfiCodeSize)
{
// The first byte of CFI_CODE is offset from the range the frame covers.
// Compute code offset from the root method.
int codeOffset = blob[j] + start;
List <byte[]> cfis;
if (!_offsetToCfis.TryGetValue(codeOffset, out cfis))
{
cfis = new List <byte[]>();
_offsetToCfis.Add(codeOffset, cfis);
}
byte[] cfi = new byte[CfiCodeSize];
Array.Copy(blob, j, cfi, 0, CfiCodeSize);
cfis.Add(cfi);
}
}
EnsureCurrentSection();
}
}