public Epilog(int index, int dw, uint startOffset)
{
Index = index;
EpilogStartOffset = UnwindInfo.ExtractBits(dw, 0, 18);
Res = UnwindInfo.ExtractBits(dw, 18, 4);
Condition = UnwindInfo.ExtractBits(dw, 20, 4);
EpilogStartIndex = UnwindInfo.ExtractBits(dw, 22, 10);
// Note that epilogStartOffset for a funclet is the offset from the beginning
// of the current funclet, not the offset from the beginning of the main function.
// To help find it when looking through JitDump output, also show the offset from
// the beginning of the main function.
EpilogStartOffsetFromMainFunctionBegin = EpilogStartOffset * 4 + startOffset;
}
/// <summary>
/// Get the RVAs of the runtime functions for each method
/// based on <a href="https://github.com/dotnet/coreclr/blob/master/src/zap/zapcode.cpp">ZapUnwindInfo::Save</a>
/// </summary>
private void ParseRuntimeFunctions(bool[] isEntryPoint, int runtimeFunctionOffset, int runtimeFunctionSize)
{
int curOffset = 0;
foreach (R2RMethod method in R2RMethods)
{
int runtimeFunctionId = method.EntryPointRuntimeFunctionId;
if (runtimeFunctionId == -1)
{
continue;
}
curOffset = runtimeFunctionOffset + runtimeFunctionId * runtimeFunctionSize;
BaseGcInfo gcInfo = null;
int codeOffset = 0;
do
{
int startRva = NativeReader.ReadInt32(Image, ref curOffset);
int endRva = -1;
if (Machine == Machine.Amd64)
{
endRva = NativeReader.ReadInt32(Image, ref curOffset);
}
int unwindRva = NativeReader.ReadInt32(Image, ref curOffset);
int unwindOffset = GetOffset(unwindRva);
BaseUnwindInfo unwindInfo = null;
if (Machine == Machine.Amd64)
{
unwindInfo = new Amd64.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new Amd64.GcInfo(Image, unwindOffset + unwindInfo.Size, Machine, R2RHeader.MajorVersion);
}
}
else if (Machine == Machine.I386)
{
unwindInfo = new x86.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new x86.GcInfo(Image, unwindOffset, Machine, R2RHeader.MajorVersion);
}
}
else if (Machine == Machine.ArmThumb2)
{
unwindInfo = new Arm.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new Amd64.GcInfo(Image, unwindOffset + unwindInfo.Size, Machine, R2RHeader.MajorVersion); // Arm and Arm64 use the same GcInfo format as x64
}
}
else if (Machine == Machine.Arm64)
{
unwindInfo = new Arm64.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new Amd64.GcInfo(Image, unwindOffset + unwindInfo.Size, Machine, R2RHeader.MajorVersion);
}
}
EHInfo ehInfo = null;
EHInfoLocation ehInfoLocation;
if (EHLookupTable != null && EHLookupTable.RuntimeFunctionToEHInfoMap.TryGetValue(startRva, out ehInfoLocation))
{
ehInfo = new EHInfo(this, ehInfoLocation.EHInfoRVA, startRva, GetOffset(ehInfoLocation.EHInfoRVA), ehInfoLocation.ClauseCount);
}
RuntimeFunction rtf = new RuntimeFunction(
runtimeFunctionId,
startRva,
endRva,
unwindRva,
codeOffset,
method,
unwindInfo,
gcInfo,
ehInfo,
_runtimeFunctionToDebugInfo.GetValueOrDefault(runtimeFunctionId));
method.RuntimeFunctions.Add(rtf);
runtimeFunctionId++;
codeOffset += rtf.Size;
}while (runtimeFunctionId < isEntryPoint.Length && !isEntryPoint[runtimeFunctionId]);
}
}
/// <summary>
/// Get the RVAs of the runtime functions for each method
/// based on <a href="https://github.com/dotnet/coreclr/blob/master/src/zap/zapcode.cpp">ZapUnwindInfo::Save</a>
/// </summary>
private void ParseRuntimeFunctions(bool[] isEntryPoint, int runtimeFunctionOffset, int runtimeFunctionSize)
{
int curOffset = 0;
foreach (R2RMethod method in R2RMethods)
{
int runtimeFunctionId = method.EntryPointRuntimeFunctionId;
if (runtimeFunctionId == -1)
{
continue;
}
curOffset = runtimeFunctionOffset + runtimeFunctionId * runtimeFunctionSize;
BaseGcInfo gcInfo = null;
int codeOffset = 0;
do
{
int startRva = NativeReader.ReadInt32(Image, ref curOffset);
int endRva = -1;
if (Machine == Machine.Amd64)
{
endRva = NativeReader.ReadInt32(Image, ref curOffset);
}
int unwindRva = NativeReader.ReadInt32(Image, ref curOffset);
int unwindOffset = GetOffset(unwindRva);
BaseUnwindInfo unwindInfo = null;
if (Machine == Machine.Amd64)
{
unwindInfo = new Amd64.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new Amd64.GcInfo(Image, unwindOffset + unwindInfo.Size, Machine, R2RHeader.MajorVersion);
}
}
else if (Machine == Machine.I386)
{
unwindInfo = new x86.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new x86.GcInfo(Image, unwindOffset, Machine, R2RHeader.MajorVersion);
}
}
else if (Machine == Machine.ArmThumb2)
{
unwindInfo = new Arm.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new Amd64.GcInfo(Image, unwindOffset + unwindInfo.Size, Machine, R2RHeader.MajorVersion); // Arm and Arm64 use the same GcInfo format as x64
}
}
else if (Machine == Machine.Arm64)
{
unwindInfo = new Arm64.UnwindInfo(Image, unwindOffset);
if (isEntryPoint[runtimeFunctionId])
{
gcInfo = new Amd64.GcInfo(Image, unwindOffset + unwindInfo.Size, Machine, R2RHeader.MajorVersion);
}
}
RuntimeFunction rtf = new RuntimeFunction(runtimeFunctionId, startRva, endRva, unwindRva, codeOffset, method, unwindInfo, gcInfo);
method.RuntimeFunctions.Add(rtf);
runtimeFunctionId++;
codeOffset += rtf.Size;
}while (runtimeFunctionId < isEntryPoint.Length && !isEntryPoint[runtimeFunctionId]);
}
}