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People, I met a rather strange situation. I deleted a small memory block and after it was not able to allocate another one. Operator "new" presented me with "out of memory" exception. But without previous call of "delete" "new" gave me what I asked it for (I'm talking about small blocks, something like 10KB). At that very time VirtualAlloc() successfully allocated required memory. How could it be?
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Corrupted heap springs to mind.
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Yeah, of course I thought about it, but was not able to detect where this sorrowful situation took place. Usually when I wrote something outside of allocated memory block, I got a message when "delete" operator was called, but not now. I tried to check surrounding memory, allocated larger then I needed block, wrote canary words before and after memory that I used and found that these canary words remained intact.
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Without seeing the relevant code, I'm afraid we cannot help you.
Veni, vidi, vici.
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Situation is worse, than I expected. Some malicious code is running at my comp. For the beginning, my Visual Studio 2005 refused to create the Project Property window and gave me something like "failed to create Net. Framework property grid". Trying to understand, why my prog refuses to open files, which it was able to open some days ago I found that in my process's address space was downloaded libraries like urlmon.dll, netapi.dll, crypt32.dll and modemInst.dll (!!!). People, I write prog which is intended to work with aerial images and I have no intention to counteract with the Net. The most interesting is the last library- it was taken not from system32 catalog, but from folder where HSPA USB Modem was placed.
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Is there any tool to findout memory leaks in an ActiveX (build using C++/MFC). This ActiveX is loaded through a webpage in IE. I want to find out leaks at run time on certain operation in the ActiveX specially during unload. I tried bound checker but there is no such option to attach IE with it.
Manish Agarwal
manish.k.agarwal @ gmail DOT com
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Hi Manish K,
There is a similar question found on the following website with details:
http://stackoverflow.com/questions/1502799/memory-leak-tool-for-c-under-windows
Please take a look at it, you may find it beneficial
With Kind Regards,
April
Comm100 - Leading Live Chat Software Provider
modified 27-May-14 8:33am.
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It is more helpful if you make your links clickable. Use the "link" or "[^]" button above the edit control.
One of these days I'm going to think of a really clever signature.
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Hello Mr. Agarwal,
With regards to your post, a tool that aids in finding memory leaks in an ActiveX (build using C++/MFC)at run time on certain operation during upload is the following:
Please visit the following:
http://forums.ni.com/t5/LabVIEW/Memory-leaks-using-active-X/td-p/117007
There a solutions listed.
With Kind Regards,
April
Comm100 - Leading Live Chat Software Provider
modified 27-May-14 8:30am.
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I am not looking simply memory leak finding tools but I am trying to deal with a special case when there is a memory leak inside an ActiveX. I know this is simply as a Leak inside a DLL but ActiveX case is some different as it is loaded by IE using JavaScript object tag and it is also unloaded by IE. I want to track leaks at unloading time.
Manish Agarwal
manish.k.agarwal @ gmail DOT com
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Hi,
I need code to tell me when a file is baing created I noticed there is a managed class FileSystemWatcher that would do the trick from my research seems like it lives
in system.dll
My question is the following is it possible to use managed code meaning using namespace System along with System::IO With the Visual C++ 6.0 compiler
or this compiler is old and doesn't support managed code
I remember in the old days there was like export statements to use methods exposed
in DLL's and maybe with this compiler this the way to go
Any Direction would be appreciated
Thanks
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No managed code with VC6 ... way too old.
Nihil obstat
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i have thousands of VC++ 6 Projects, now i want to batch upgrade and build them to VC++ 2010.
i don't know how to do that.
Any body can help me?
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Thank you so much for your reply. But, can you post the Script which can work for VC++ 2010?
Because I'm not using VC++ .Net.
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Falconapollo wrote: i want to batch upgrade and build them to
I doubt that is realistic.
There is no reasonable scenario in which a QA department could be expected to verify those and no way that Operations/Support could be expected to put thousands into production at the same time.
Thus a planned rollout involving small sets is required. And small sets can be upgraded manually.
Even if everything went smoothly with say the first 100 one would still want to have a grace period between production and the next batch to insure that some serious problem didn't develop. Attempting to rollback tens versus thousands of apps is obviously very different.
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jschell wrote:
I doubt that is realistic.
Why is it not realistic ?
It might be part of a bigger process to upgrade their code-base to a newer compiler/system; maybe a year long process (not uncommon for large systems).
Maybe they have a unit test system in place to validate all their code and system tests to validate the outputs.
I think thinking about a way to automatize converting their project files is good thinking; I would not want to have to double click on 1000s of dsw/dsp in VS2010 and manually upgrade the project files.
Nihil obstat
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Maximilien wrote: Why is it not realistic ?
Restating what I already said...the mas rollout cannot be done all at once.
Maximilien wrote: Maybe they have a unit test system in place to validate all their code and
system tests to validate the outputs.
Anyone that relies on that as their sole production test deserves the problems that can occur.
Maximilien wrote: I would not want to have to double click on 1000s of dsw/dsp in VS2010 and
manually upgrade the project files.
A phased rollout means that you must support the current production set, not what might be in a year from now. And using a branch (with the older versions) to support most of production for a year just so you don't have to click a few buttons once a week doesn't seem cost effective to me.
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Unit testing is only one of many validation tools when updating code to newer compilers.
Maybe they have tons of small and simple libraries (.lib) projects that need to be upgraded and when all tests are passed and validated they will be released. (AFAIK) The library are not compatible between VC6 and VS2010; so they might have to do it "all at once" (an exe build with VC cannot use a VS2010 library and vice-versa).
In the OP's particular case, coming from VC6, it might be the least of their problems if they have been doing C++ and MFC; just fixing all of the compilation errors and warning will probably take forever.
Just updating the project files will be at best hard, even if they can automatize them.
Nihil obstat
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After developing in C#, PHP and several other programming/scripting language I thought I'd give C a try last week. After a week of coding I'm beginning to get the hang of it. I wrote a simple, incomplete HTTP client in C. Since I never coded in C before last weeek I don't know what I'm doing wrong, do I use stuff that is considered bad practice? My code compiles fine and it works fine, I'm just wondering if somebody can take a look and tell me what I could improve. Don't be nice, just tell me what is wrong and what sucks.
My code can be found at git hub:
https://github.com/TheKirk/http-client-c
Thanks in advance 
[Moved by Ed.]
modified 2-Jan-13 10:50am.
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Before you get flamed, I thought I'd point out that the Lounge is not the place to post programming questions. If I were you, I would possibly look to split out parts of your application into bite sized chunks and post questions in the Q and A forum asking whether the code follows good practices. I certainly wouldn't link to it in the lounge.
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Pete is right - we come here to get away from programming and to relax a bit.
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.
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