internal Symbol GetSymbol(string symbolName)
{
// Initialise a native symbol handler
if (!Dbghelp.SymSetOptions(SymbolOptions.UndecorateName).HasFlag(SymbolOptions.UndecorateName))
{
throw new Win32Exception();
}
if (!Dbghelp.SymInitialize(Kernel32.GetCurrentProcess(), null, false))
{
throw new Win32Exception();
}
try
{
const int pseudoDllAddress = 0x1000;
// Load the symbol file into the symbol handler
var symbolFileSize = new FileInfo(_pdbFilePath).Length;
var symbolTableAddress = Dbghelp.SymLoadModuleEx(Kernel32.GetCurrentProcess(), IntPtr.Zero, _pdbFilePath, null, pseudoDllAddress, (int)symbolFileSize, IntPtr.Zero, 0);
if (symbolTableAddress == 0)
{
throw new Win32Exception();
}
try
{
// Initialise a buffer to store the symbol information
Span <byte> symbolInformationBytes = stackalloc byte[(Unsafe.SizeOf <SymbolInfo>() + sizeof(char) * Constants.MaxSymbolNameLength + sizeof(long) - 1) / sizeof(long)];
MemoryMarshal.Write(symbolInformationBytes, ref Unsafe.AsRef(new SymbolInfo(Unsafe.SizeOf <SymbolInfo>(), 0, Constants.MaxSymbolNameLength)));
// Retrieve the symbol information
if (!Dbghelp.SymFromName(Kernel32.GetCurrentProcess(), symbolName, out symbolInformationBytes[0]))
{
throw new Win32Exception();
}
var symbolInformation = MemoryMarshal.Read <SymbolInfo>(symbolInformationBytes);
return(new Symbol((int)(symbolInformation.Address - pseudoDllAddress)));
}
finally
{
Dbghelp.SymUnloadModule64(Kernel32.GetCurrentProcess(), symbolTableAddress);
}
}
finally
{
Dbghelp.SymCleanup(Kernel32.GetCurrentProcess());
}
}
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);
}
}
private static ImmutableDictionary <string, int> ParseSymbolOffsets(string pdbPath, IEnumerable <string> symbolNames)
{
var symbolOffsets = new Dictionary <string, int>();
using var localProcess = System.Diagnostics.Process.GetCurrentProcess();
// Initialise a symbol handler
Dbghelp.SymSetOptions(SymbolOptions.UndecorateName | SymbolOptions.DeferredLoads);
if (!Dbghelp.SymInitialize(localProcess.SafeHandle, null, false))
{
throw ExceptionBuilder.BuildWin32Exception("SymInitialize");
}
// Load the symbol table for the PDB
const int pseudoDllBaseAddress = 0x1000;
var pdbSize = new FileInfo(pdbPath).Length;
var symbolTableAddress = Dbghelp.SymLoadModuleEx(localProcess.SafeHandle, IntPtr.Zero, pdbPath, null, pseudoDllBaseAddress, (int)pdbSize, IntPtr.Zero, 0);
if (symbolTableAddress == 0)
{
throw ExceptionBuilder.BuildWin32Exception("SymLoadModuleEx");
}
// Initialise a buffer to receive the symbol information
var symbolInfoBufferSize = (Unsafe.SizeOf <SymbolInfo>() + Constants.MaxSymbolName * sizeof(char) + sizeof(long) - 1) / sizeof(long);
var symbolInfoBuffer = new byte[symbolInfoBufferSize];
var symbolInfo = new SymbolInfo {
SizeOfStruct = Unsafe.SizeOf <SymbolInfo>(), MaxNameLen = Constants.MaxSymbolName
};
MemoryMarshal.Write(symbolInfoBuffer, ref symbolInfo);
// Retrieve the offsets of the symbols
SymbolInfo RetrieveSymbolInformation(string symbolName)
{
if (!Dbghelp.SymFromName(localProcess.SafeHandle, symbolName, ref symbolInfoBuffer[0]))
{
throw ExceptionBuilder.BuildWin32Exception("SymFromName");
}
return(MemoryMarshal.Read <SymbolInfo>(symbolInfoBuffer));
}
foreach (var symbolName in symbolNames)
{
var symbolInformation = RetrieveSymbolInformation(symbolName);
symbolOffsets.Add(symbolName, (int)(symbolInformation.Address - pseudoDllBaseAddress));
}
if (!Dbghelp.SymCleanup(localProcess.SafeHandle))
{
throw ExceptionBuilder.BuildWin32Exception("SymCleanup");
}
return(symbolOffsets.ToImmutableDictionary());
}
private static IEnumerable <Symbol> ParseSymbols(string pdbFilePath, IEnumerable <string> symbolNames)
{
// Initialise a symbol handler
Dbghelp.SymSetOptions(SymbolOptions.UndecorateName);
using var currentProcessHandle = Kernel32.GetCurrentProcess();
if (!Dbghelp.SymInitialize(currentProcessHandle, null, false))
{
throw new Win32Exception();
}
try
{
// Load the symbol table for the PDB into the symbol handler
const int pseudoDllBaseAddress = 0x1000;
var pdbSize = new FileInfo(pdbFilePath).Length;
var symbolTableAddress = Dbghelp.SymLoadModuleEx(currentProcessHandle, IntPtr.Zero, pdbFilePath, null, pseudoDllBaseAddress, (int)pdbSize, IntPtr.Zero, 0);
if (symbolTableAddress == 0)
{
throw new Win32Exception();
}
var symbolInformationBlockSize = (Unsafe.SizeOf <SymbolInfo>() + Constants.MaxSymbolName * sizeof(char) + sizeof(long) - 1) / sizeof(long);
int GetSymbolRva(string symbolName)
{
// Initialise a block to receive the symbol information
Span <byte> symbolInformationBlock = stackalloc byte[symbolInformationBlockSize];
var symbolInformation = new SymbolInfo(Constants.MaxSymbolName);
MemoryMarshal.Write(symbolInformationBlock, ref symbolInformation);
// Retrieve the symbol information
if (!Dbghelp.SymFromName(currentProcessHandle, symbolName, out symbolInformationBlock[0]))
{
throw new Win32Exception();
}
// Calculate the relative virtual address of the symbol
symbolInformation = MemoryMarshal.Read <SymbolInfo>(symbolInformationBlock);
return((int)(symbolInformation.Address - pseudoDllBaseAddress));
}
foreach (var symbolName in symbolNames)
{
var symbolRva = GetSymbolRva(symbolName);
yield return(new Symbol(symbolName, symbolRva));
}
}
finally
{
Dbghelp.SymCleanup(currentProcessHandle);
}
}
