How to set PROCESS_SET_QUOTA to process?

Question

I want to use SetProcessWorkingSetSize function, and on MSDN i see this:

"The handle must have the PROCESS_SET_QUOTA access right. For more information, see Process Security and Access Rights."

So, how can i set PROCESS_SET_QUOTA to process handle?

I want to write program that runs executable with working set limits, so there is main piece of code:

STARTUPINFO si;
    memset(&si, 0, sizeof(si));
    si.cb = sizeof(si);
    GetStartupInfo(&si);
    si.dwFlags = 0;
    PROCESS_INFORMATION pi;

if (!CreateProcess(
        exePath.c_str(),
        cmdParametersBuffer,
        NULL,
        NULL,
        FALSE,
        NORMAL_PRIORITY_CLASS,
        NULL,
        NULL,
        &si,
        &pi))
    {
     cout << "error" << endl;
    }
SetProcessWorkingSetSize(pi.hProcess, 20 * 4 * 1024, 100*1024*1024);

Must downvote, net is full of examples how to enable or disable privilegies. — Xearinox
– Xearinox, Commented Apr 8, 2014 at 13:16
For example snippet from MSDN: msdn.microsoft.com/en-us/library/windows/desktop/… — Xearinox
– Xearinox, Commented Apr 8, 2014 at 13:21
As i understand this example can change priveleges of existing objects. The question is how to set privelege to process that creating by CreateProcess. So, i can't find any answer in net, sorry. Can you help me with this? — brachistochron
– brachistochron, Commented Apr 8, 2014 at 13:47

Remy Lebeau · Accepted Answer · 2014-04-08 20:40:09Z

2

Did you actually try the code you have showed and it is not working for you? If so, what error is GetLastError() reporting?

If you read the documentation, it says:

Process Security and Access Rights

PROCESS_ALL_ACCESS
All possible access rights for a process object.
...
The handle returned by the CreateProcess function has PROCESS_ALL_ACCESS access to the process object

So you should be able to call SetProcessWorkingSetSize() after CreateProcess() exits, exactly like you have showed, without doing anything extra to enable PROCESS_SET_QUOTA rights, as it should already be enabled.

answered Apr 8, 2014 at 20:40

Remy Lebeau

609k36 gold badges516 silver badges875 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

brachistochron Over a year ago

Hi, thanks for answer. GetLastError returns 0 I just write this thest app ideone.com/VqjrwL and run it using this code example, but did'nt get any notifications or error messages. so all works like i don't set any limit

brachistochron Over a year ago

so i set working set size to 100 Mb, but in app allocates 1Gb without no errors or notifications.

brachistochron Over a year ago

So, can you help me with this?

Carl Walsh · Accepted Answer · 2016-07-28 18:02:42Z

0

Your example code is calling SetProcessWorkingSetSize() successfully, as the error you get is 0. If you got an error like 0x522 ERROR_PRIVILEGE_NOT_HELD then you'd know the call failed.

It might help to know that an app is expected to be able to allocate more memory than its the working set size. The OS will page out memory from RAM. If you use Task Manager to view the Working Set for your process, is it actually exceeding the quota you set?

You might also need to use SetProcessWorkingSetSizeEx wth flag QUOTA_LIMITS_HARDWS_MAX_ENABLE to force the OS to actually apply your setting.

answered Jul 28, 2016 at 18:02

Carl Walsh

7,2273 gold badges53 silver badges58 bronze badges

Collectives™ on Stack Overflow

How to set PROCESS_SET_QUOTA to process?

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related