internal Symbol GetSymbol(string symbolName)
{
// Initialise a symbol handler
Dbghelp.SymSetOptions(SymbolOptions.UndecorateName);
var currentProcessHandle = Kernel32.GetCurrentProcess();
if (!Dbghelp.SymInitialize(currentProcessHandle, null, false))
{
throw new Win32Exception();
}
try
{
const int pseudoDllAddress = 0x1000;
// Load the symbol table for the PDB into the symbol handler
var pdbSize = new FileInfo(_pdbFilePath).Length;
var symbolTableAddress = Dbghelp.SymLoadModule(currentProcessHandle, IntPtr.Zero, _pdbFilePath, null, pseudoDllAddress, (int)pdbSize);
if (symbolTableAddress == 0)
{
throw new Win32Exception();
}
// Initialise an array to receive the symbol information
var symbolInformationSize = (Unsafe.SizeOf <SymbolInfo>() + sizeof(char) * Constants.MaxSymbolNameLength + sizeof(long) - 1) / sizeof(long);
Span <byte> symbolInformationBytes = stackalloc byte[symbolInformationSize];
MemoryMarshal.Write(symbolInformationBytes, ref Unsafe.AsRef(new SymbolInfo(Unsafe.SizeOf <SymbolInfo>(), 0, Constants.MaxSymbolNameLength)));
// Retrieve the symbol information
if (!Dbghelp.SymFromName(currentProcessHandle, symbolName, out symbolInformationBytes[0]))
{
throw new Win32Exception();
}
var symbolInformation = MemoryMarshal.Read <SymbolInfo>(symbolInformationBytes);
return(new Symbol((int)(symbolInformation.Address - pseudoDllAddress)));
}
finally
{
Dbghelp.SymCleanup(currentProcessHandle);
}
}
