private async Task <Dictionary <string, IntPtr> > ParseSymbols(bool isWow64)
{
// Initialise a symbol handler for the local process
var localProcessHandle = Process.GetCurrentProcess().SafeHandle;
if (!Dbghelp.SymInitialize(localProcessHandle, IntPtr.Zero, false))
{
throw new PInvokeException("Failed to call SymInitialize");
}
// Load the symbol table for the PDB
var pdbPathBuffer = Marshal.StringToHGlobalAnsi(await DownloadPdb(isWow64));
var symbolTableBaseAddress = Dbghelp.SymLoadModuleEx(localProcessHandle, IntPtr.Zero, pdbPathBuffer, IntPtr.Zero, _module.BaseAddress, int.MaxValue, IntPtr.Zero, 0);
if (symbolTableBaseAddress == IntPtr.Zero)
{
throw new PInvokeException("Failed to call SymLoadModuleEx");
}
// Initialise the callback used during SymEnumSymbols
var symbolAddresses = new List <IntPtr>();
var symbolNames = new List <string>();
bool Callback(IntPtr symbolInfo, int symbolSize, IntPtr userContext)
{
symbolAddresses.Add((IntPtr)Marshal.PtrToStructure <SymbolInfo>(symbolInfo).Address);
symbolNames.Add(Marshal.PtrToStringAnsi(symbolInfo + Marshal.SizeOf <SymbolInfo>()));
return(true);
}
var callBackPointer = Marshal.GetFunctionPointerForDelegate(new Callbacks.EnumerateSymbolsCallback(Callback));
// Enumerate the PDB symbols
if (!Dbghelp.SymEnumSymbols(localProcessHandle, symbolTableBaseAddress, IntPtr.Zero, callBackPointer, IntPtr.Zero))
{
throw new PInvokeException("Failed to call SymEnumSymbols");
}
Dbghelp.SymUnloadModule64(localProcessHandle, symbolTableBaseAddress);
var symbols = new Dictionary <string, IntPtr>();
for (var symbolIndex = 0; symbolIndex < symbolNames.Count; symbolIndex++)
{
symbols.TryAdd(symbolNames[symbolIndex], symbolAddresses[symbolIndex]);
}
return(symbols);
}
private static Dictionary <string, IntPtr> ParseSymbols(string pdbPath, IntPtr moduleAddress)
{
var symbols = new Dictionary <string, IntPtr>();
// Initialise a symbol handler for the local process
using var localProcess = Process.GetCurrentProcess();
if (!Dbghelp.SymInitialize(localProcess.SafeHandle, IntPtr.Zero, false))
{
throw new Win32Exception($"Failed to call SymInitialize with error code {Marshal.GetLastWin32Error()}");
}
// Load the symbol table for the PDB
var pdbPathBuffer = Encoding.Default.GetBytes(pdbPath);
var symbolTableBaseAddress = Dbghelp.SymLoadModuleEx(localProcess.SafeHandle, IntPtr.Zero, ref pdbPathBuffer[0], IntPtr.Zero, moduleAddress, (int)new FileInfo(pdbPath).Length, IntPtr.Zero, 0);
if (symbolTableBaseAddress == IntPtr.Zero)
{
throw new Win32Exception($"Failed to call SymLoadModuleEx with error code {Marshal.GetLastWin32Error()}");
}
// Initialise the callback used during the SymEnumSymbols call
bool Callback(ref SymbolInfo symbolInfo, int symbolSize, IntPtr userContext)
{
var symbolNameBuffer = new byte[symbolInfo.NameLen];
Unsafe.CopyBlockUnaligned(ref symbolNameBuffer[0], ref symbolInfo.Name, (uint)symbolNameBuffer.Length);
symbols.TryAdd(Encoding.Default.GetString(symbolNameBuffer), (IntPtr)symbolInfo.Address);
return(true);
}
var callbackDelegate = new Prototypes.EnumerateSymbolsCallback(Callback);
// Enumerate the PDB symbols
if (!Dbghelp.SymEnumSymbols(localProcess.SafeHandle, symbolTableBaseAddress, IntPtr.Zero, callbackDelegate, IntPtr.Zero))
{
throw new Win32Exception($"Failed to call SymEnumSymbols with error code {Marshal.GetLastWin32Error()}");
}
if (!Dbghelp.SymUnloadModule(localProcess.SafeHandle, symbolTableBaseAddress))
{
throw new Win32Exception($"Failed to call SymUnloadModule with error code {Marshal.GetLastWin32Error()}");
}
return(symbols);
}
private Dictionary <string, IntPtr> ParseSymbols(string pdbPath, IntPtr moduleAddress)
{
// Initialise a symbol handler for the local process
var localProcessHandle = Process.GetCurrentProcess().SafeHandle;
if (!Dbghelp.SymInitialize(localProcessHandle, IntPtr.Zero, false))
{
throw new PInvokeException("Failed to call SymInitialize");
}
// Load the symbol table for the PDB
var pdbPathBuffer = Marshal.StringToHGlobalAnsi(pdbPath);
var symbolTableBaseAddress = Dbghelp.SymLoadModuleEx(localProcessHandle, IntPtr.Zero, pdbPathBuffer, IntPtr.Zero, moduleAddress, int.MaxValue, IntPtr.Zero, 0);
if (symbolTableBaseAddress == IntPtr.Zero)
{
throw new PInvokeException("Failed to call SymLoadModuleEx");
}
// Initialise the callback used during the SymEnumSymbols call
var symbols = new Dictionary <string, IntPtr>();
bool Callback(IntPtr symbolInfo, int symbolSize, IntPtr userContext)
{
symbols.TryAdd(Marshal.PtrToStringAnsi(symbolInfo + Marshal.SizeOf <SymbolInfo>()), (IntPtr)Marshal.PtrToStructure <SymbolInfo>(symbolInfo).Address);
return(true);
}
var callbackDelegate = new Prototypes.EnumerateSymbolsCallback(Callback);
var callbackPointer = Marshal.GetFunctionPointerForDelegate(callbackDelegate);
// Enumerate the PDB symbols
if (!Dbghelp.SymEnumSymbols(localProcessHandle, symbolTableBaseAddress, IntPtr.Zero, callbackPointer, IntPtr.Zero))
{
throw new PInvokeException("Failed to call SymEnumSymbols");
}
Dbghelp.SymUnloadModule64(localProcessHandle, symbolTableBaseAddress);
return(symbols);
}
