It's the only place in the code, I'm trying to delete it as well. As I said, you've got the last one wrong. So you don't know how much data can be copied in. The answer to point 5 is it corrupts the heap, causing a crash when you try to use it later on. In article Pedro Graca wrote:Uh? See our for more details. I am supposed to be writing a class called MyInt that will be able to hold integers larger than 4,294,967,295 max size of an int , not dealing with negative values.
Sometimes it is, I think at least, just pointless ambiguity. Everyhting looks fine until free is executed. Thanks alot in advance for help. Since key is an area of p bytes, valid indices are 0 through p-1, inclusive. What you're doing wrong is unfortunately filtering out the bits that you think aren't relevant, without being qualified to do so, since you don't understand the cause of the problem. So we continued looking ahead and tried to lock the areas where the variable got created and initialized. Do not include a link to a final product or to a demo in your post.
The weird thing is that the code works as intended, it produces an accuarate histogram, now I just need helping cleaning up this free invalid next size error. If it is null, remember to free the old value. Can you point me in the right direction here? I should point out I'm compiling with gcc 4. In article Pedro Graca wrote: Uh? Thank you graemef I spend my whole night looking over that constructor writing it out over and over on paper and that never crossed my mind. Richard thx for the suggestions, Richard, I'll try to exam the code again. It would be possible to specify things precisely, then use English text to relax the requirements, instead of using English to specify things laxly. If your question wasn't rhetorical, this realloc probably answers your question.
It probably works around a bug - using strncpy without thorough understanding is asking for one, btw - and leaves a time bomb in your code. To eliminate the size zero problem, you need to know the old size, and check that it isn't zero. To eliminate the size zero problem, you need to know the old size, and check that it isn't zero. And, mine had one coding error, and one size zero problem. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features.
Which as Chris Torek's example shows, it's based on compiler secrets. Yes, I understand this is nothing more than an exercise in second guessing the compiler secrets. My guess is that either a one of the elements in narray is zero, which I think is an invalid array size, b you're deleting an array more that once, or c you're over flowing one of the arrays. So I would just be needing as mnay bytes as the pages available. I had this nagging feeling and so I went ahead and came up with a small test sample that replicates the code where we are seeing the crash. It has undefined behavior since it doesn't determine the 'magic mystery size' of s1.
Good point about the size of word. If the above is your exact code, you have several off-by-one errors; then again, if the above is your exact code, it doesn't compile, because there is a lot missing. What I am trying to do here is trying to get a snapshot of what pages are currently in memory using the mincore linux system call. A common cause for that is writing outside the bounds of the memory block you requested, since those data structures are typically stored in the parts surrounding the returned allocated block. I'm new in this forum, but I have quite some time reading in the background all the amazing help you give here.
Paste, do not retype it into your post, otherwise you'll make typos. In short, link to only your code and be specific about what you want feedback on. I hope this helps tim Says: Thanks for the awesome article. In both C89 and C99, realloc p, 0 where p! I still want to make sure what the problem is, though. Do not suggest or help somebody do something illegal or unethical. Unfortunately, people who didn't use C in the '80s or early 90's usually think they are the lower boundaries. If anybody has any suggestions I would be much obliged.
I googled the errors of course but I found that these errors occur when one tries to free non existent memory, or write too much etc. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. If you don't show enough code, then we wont be able to find the problem. See our for more details. In article Pedro Graca wrote: Uh? But again I dont have the whole code as this is a shared project. The realloc problem is still here. I got the above mentioned error.
Any suggestion could be helpful, thx very much! Having a problem logging in? There are so many duplicates found for this question that annoyingly, I cannot find the right one for you. I tend not to realloc to size 0 and therefore not care what it might or might not do. Probably you have corrupted glibc's housekeeping data by performing an illegal operation on an object with dynamic storage duration, such as writing past the end of an allocated area. Thanks in advance for your help. You are supposed to be able to do things such as MyInt x 121401 ; and I have done operator overloading for cout so far. Make sure it's the actual code you are compiling and running, don't paraphrase it or recreate it from memory -- copy and paste from your editor. Any help would be greatly appreciated.