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Can you please tell me how to do this?
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i need to send some information to server while client application crashes. So that only im asking.
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Either hook TerminateProcess API or make it as your design limitation.
Another way is to make a service or another application which will continuously monitor your client application and once it has been closed from Task Manager, that service or application should send signal to your server.
f
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thanks for all answer ...
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«_Superman_» wrote: will not work properly from Vista onwards.
Why do you say it won't work from Vista onward?
I have a hooking library that works just fine in Vista.
I agree that IAT patching is a poor way to hook, however. The Detours way is far superior.
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Sorry. That is what I meant.
Should have been more specific there.
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You'd have to hook it globally, something that's hard to do. Almost all hooking methods word within a process.
Steve
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As has been said, when a process is terminated it's killed with prejudice and receives no notifications. That's the purpose of TerminateProcess, to kill a process that's misbehaving and can't be trusted.
Perhaps a better approach would be to use an external process to monitor the process in question.
Steve
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hi,
how do i solve the "memory leak" problem in my VC++ project? is it calling SetProcessWorkingSetSize function?
Zo.Naderi-Iran
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Where did you find memory leak in code?
Or do you want to find if there is memory leak in your code?
--
"Programming is an art that fights back!"
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1. Search for all occurrences of the new keyword.
2. Make sure they have a corresponding delete (or delete [] where applicable)
3. Search for alloc (will catch malloc, calloc, ...)
4. Make sure they have a corresponding free().
What else? Do you use COM components? GDI? Files? Databases? Registry?
Try to run a subset of your application with a low code coverage to see if you still leak to narrow it down. (This might require code changes.) Increase the coverage in steps.
A code review can also make wonders.
Purchase a detection tool if your budget allows it.
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yes, i checked my project. all new keyword have delete and ...
an infinite loop there is in my project. in this loop, i new and delete several pointer.
is it useful , the calling SetProcessWorkingSetSize , in first or end of loop?
Zo.Naderi-Iran
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You have a serious problem in your code, and SetProcessWorkingSetSize will unfortunatly not save you.
Try and remove the new/delete in your loop if possible. Are you sure you don't have any condtional deletes? (whithin if/else block?) Does all branches clean up as expected?
I didn't ask, but how is the leak showing? Can you spot it from the task manager while executing, or does visual studio inform you when you exit?
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the memory value, in task manager , is increscent.
Zo.Naderi-Iran
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Ok, so let's assume the leak really is from within the loop.
Do you maybe have any exception / exception handling where the new/delete pair breaks?
like:
try {
int *p = new int;
if (bNowAndThen)
throw "Exception";
delete p;
}
catch (const char* e)
{
}
If not, you need to start inspecting the functions you call from the loop and see if any of them is causing this. Do this by removing as much as you can, recompile and run. If it looks ok try adding a few calls until the error occurs again.
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ok, thank you, dear Niklas .
i will do it.
if i don't luck, i question you ,again.
thanx
Zo.Naderi-Iran
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The best way to avoid memory leaks is not to cause them in the first place. So....
- avoid using new and delete, make your objects automatic and use "parameterise from the top"
- if you're using arrays use std::vector instead
- if you're using arrays of characters use std::string instead
- use classes to manage resources generally - google RAII and have a read
- don't use raw pointers unless you're interacting with legacy code
Cheers,
Ash
PS: For the pedants - you can break all these rules, but have a reason to apart from "I didn't do that in C" or "I read it in a book by Herb Schildt"
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Just out of curiosity, what did Herb Schildt do?
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Mr. Schildt has written loads of rather bad books about C++. I've met plenty of poor programmers that have learnt C from one of his books thinking they were learning C++. And more annoyingly I bought a couple of his books incredibly cheap from a remaindered book store in 1998 and even though each was the price of a pint of beer at the time I felt exceedingly short changed after reading them.
He's not unique BTW, there are plenty of appalling books out there that try to teach C++ but he's churned out far more than most of the others. What I find particularly distrurbing are the number of professional educators that don't seem to be able to tell what's a good teaching text and what isn't.
Cheers,
Ash
PS: Just so I'm not being wholly negative, there are two very good books to learn C++ from:
- "Accelerated C++" by Koenig and Moo - this is great for experienced programmers who want to learn C++
- "Programming -- Principles and Practice Using C++" by Stroustrup. This is better for people who have no exposure to programming but still gives them a good grounding.
modified on Wednesday, June 9, 2010 7:34 AM
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I have to say your answer is one of the most informative and useful I have seen for a long time. I've learned two new patterns and got some suggestions for further reading.
It's time for a new signature.
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Dear All,
I want to find the handle of parent window containing windowless content. Example of web page containing windowless content is http://www.metacafe.com. On this site video files is getting played in windowless mode i.e. the player is not a window but just an content embedded in some other window (host/parent window). I want to determine handle of this parent window. contrary to this on youtube, the area on which video runs, is in itself a window.
Using spy++, I can determine the hierarchy of window in the IE window and If i will follow this hierarchy I can reach to the host/parent window on metacafe. But I believe it would only be applicable to metacafe. There must be some site which will host windowless content in different windows hierarchy.
So, please let me know if anyone knows how to get window handle of parent/host window containing/hosting windowless content.
Regards
f
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For trancating file size using:
int _chsize( int fd, long size);
require to provide parameter "int fd" i.e. file descriptor.
How to provide file descriptor?
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What's wrong with the previous replies ? Are you too lazy to follow a link and read some documentation ?
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For trancating file size using:
int _chsize( int fd, long size);
require to provide parameter "int fd" i.e. file descriptor.
How to provide file descriptor?
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