/// <summary>
/// Creates a MemorySnapshot instance for the specified OS process.
/// </summary>
/// <param name="processId">The ID of the process for which to generate the memory snapshot.</param>
/// <returns>A MemorySnapshot instance containing memory information for the specified process,
/// at the time of the snapshot.</returns>
public static MemorySnapshot FromProcess(int processId)
{
MemorySnapshot memorySnapshot = new MemorySnapshot();
Process process = Process.GetProcessById(processId);
process.Refresh();
PROCESS_MEMORY_COUNTERS_EX counters = MemoryInterop.GetCounters(process.Handle);
// Populate memory statistics.
memorySnapshot.GdiObjectCount = NativeMethods.GetGuiResources(process.Handle, NativeMethods.GR_GDIOBJECTS);
memorySnapshot.HandleCount = process.HandleCount;
memorySnapshot.PageFileBytes = counters.PagefileUsage;
memorySnapshot.PageFilePeakBytes = counters.PeakPagefileUsage;
memorySnapshot.PoolNonpagedBytes = counters.QuotaNonPagedPoolUsage;
memorySnapshot.PoolPagedBytes = counters.QuotaPagedPoolUsage;
memorySnapshot.ThreadCount = process.Threads.Count;
memorySnapshot.UserObjectCount = NativeMethods.GetGuiResources(process.Handle, NativeMethods.GR_USEROBJECTS);
memorySnapshot.VirtualMemoryBytes = process.VirtualMemorySize64;
memorySnapshot.VirtualMemoryPrivateBytes = counters.PrivateUsage;
memorySnapshot.WorkingSetBytes = process.WorkingSet64;
memorySnapshot.WorkingSetPeakBytes = process.PeakWorkingSet64;
memorySnapshot.WorkingSetPrivateBytes = MemoryInterop.GetPrivateWorkingSet(process);
memorySnapshot.Timestamp = DateTime.Now;
return(memorySnapshot);
}
internal static PROCESS_MEMORY_COUNTERS_EX GetCounters(IntPtr hProcess)
{
PROCESS_MEMORY_COUNTERS_EX counters = new PROCESS_MEMORY_COUNTERS_EX();
counters.cb = Marshal.SizeOf(counters);
if (NativeMethods.GetProcessMemoryInfo(hProcess, out counters, Marshal.SizeOf(counters)) == 0)
{
throw new Win32Exception();
}
return(counters);
}
internal static PROCESS_MEMORY_COUNTERS_EX GetCounters(IntPtr hProcess)
{
PROCESS_MEMORY_COUNTERS_EX counters = new PROCESS_MEMORY_COUNTERS_EX();
counters.cb = Marshal.SizeOf(counters);
if (NativeMethods.GetProcessMemoryInfo(hProcess, out counters, counters.cb) == 0)
{
int error = NativeMethods.GetLastError();
throw new Win32Exception(
"GetProcessMemoryInfo failed with last error " + error.ToString() + ": " +
"Marshal.SizeOf(counters) = " + Marshal.SizeOf(counters).ToString() + ", " +
"counters.cb = " + counters.cb.ToString());
}
return(counters);
}
static extern int GetProcessMemoryInfo(IntPtr hProcess, out PROCESS_MEMORY_COUNTERS_EX counters, int size);