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_REL32, 4);
// 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_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(_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();
_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 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 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();
}
}
