public ProcessDetail(int pid)
{
// Initialize everything to null in case something fails.
this.processId = pid;
this.processHandleFlags = LowLevelTypes.ProcessAccessFlags.NONE;
this.cachedProcessBasicInfo = null;
this.machineTypeIsLoaded = false;
this.machineType = LowLevelTypes.MachineType.UNKNOWN;
this.cachedPeb = null;
this.cachedProcessParams = null;
this.cachedCommandLine = null;
this.processHandle = IntPtr.Zero;
OpenAndCacheProcessHandle();
}
private void OpenAndCacheProcessHandle()
{
// Try to open a handle to the process with the highest level of privilege, but if we can't
// do that then fallback to requesting access with a lower privilege level.
processHandleFlags = LowLevelTypes.ProcessAccessFlags.QUERY_INFORMATION
| LowLevelTypes.ProcessAccessFlags.VM_READ;
processHandle = NativeMethods.OpenProcess(processHandleFlags, false, processId);
if (processHandle == IntPtr.Zero) {
processHandleFlags = LowLevelTypes.ProcessAccessFlags.QUERY_LIMITED_INFORMATION;
processHandle = NativeMethods.OpenProcess(processHandleFlags, false, processId);
if (processHandle == IntPtr.Zero) {
processHandleFlags = LowLevelTypes.ProcessAccessFlags.NONE;
throw new Win32Exception();
}
}
}
public static extern IntPtr OpenProcess(
LowLevelTypes.ProcessAccessFlags dwDesiredAccess,
[MarshalAs(UnmanagedType.Bool)] bool bInheritHandle,
int dwProcessId);
