static private int GetProcessBitness(IntPtr hProcess)
{
if (System.Environment.Is64BitOperatingSystem)
{
bool wow64;
if (!ProcessNativeMethods.IsWow64Process(hProcess, out wow64))
{
return(32);
}
if (wow64)
{
return(32);
}
return(64);
}
else
{
return(32);
}
}
private static string GetCommandLineCore(IntPtr processHandle)
{
int commandLineLength;
IntPtr commandLineBuffer;
byte[] commandLine;
int processBitness = GetProcessBitness(processHandle);
if (processBitness == 64 && !System.Environment.Is64BitProcess)
{
return("[cannot determine command line arguments bitness mismatch]");
}
try
{
IntPtr pPeb = processBitness == 64 ? GetPeb64(processHandle) : GetPeb32(processHandle);
int offset = processBitness == 64 ? 0x20 : 0x10;
int unicodeStringOffset = processBitness == 64 ? 0x70 : 0x40;
IntPtr ptr;
if (!ReadIntPtr(processHandle, pPeb + offset, out ptr))
{
return("[cannot determine command line arguments]");
}
if ((processBitness == 64 && System.Environment.Is64BitProcess) ||
(processBitness == 32 && !System.Environment.Is64BitProcess))
{
//System and Process are both the same bitness.
ProcessNativeMethods.UNICODE_STRING unicodeString = new ProcessNativeMethods.UNICODE_STRING();
if (!ProcessNativeMethods.ReadProcessMemory(processHandle, ptr + unicodeStringOffset, ref unicodeString, new IntPtr(Marshal.SizeOf(unicodeString)), IntPtr.Zero))
{
return("[cannot determine command line arguments]");
}
commandLineLength = unicodeString.Length;
commandLineBuffer = unicodeString.Buffer;
}
else
{
//System is 64 bit and the process is 32 bit
ProcessNativeMethods.UNICODE_STRING_32 unicodeString32 = new ProcessNativeMethods.UNICODE_STRING_32();
if (!ProcessNativeMethods.ReadProcessMemory(processHandle, ptr + unicodeStringOffset, ref unicodeString32, new IntPtr(Marshal.SizeOf(unicodeString32)), IntPtr.Zero))
{
return("[cannot determine command line arguments]");
}
commandLineLength = unicodeString32.Length;
commandLineBuffer = new IntPtr(unicodeString32.Buffer);
}
commandLine = new byte[commandLineLength];
if (!ProcessNativeMethods.ReadProcessMemory(processHandle, commandLineBuffer, commandLine, new IntPtr(commandLineLength), IntPtr.Zero))
{
return("[cannot determine command line arguments]");
}
return(Encoding.Unicode.GetString(commandLine));
}
catch (Win32Exception)
{
return("[cannot determine command line arguments]");
}
}