Home > Invalid Pointer > Invalid Pointer C

Invalid Pointer C


Then, when you assign to parts of the Queue structure that are past the space you've actually allocated, you stamp some other part of memory. When you find yourself working on something like an AVR microcontroller as H2CO3 has, it is definitely worthwhile to note all the differences, which from my own experience with embedded systems, When i put those back in. You have a few errors: You're trying to free memory that's not heap memory. weblink

Why are you using malloc and free, you don't need them here. –ouah Nov 12 '13 at 22:45 So in this case I would not need to free ptr What do you call someone who acts "cool-headed"? In trying to debug, I ended up commenting out each free() in my code, one by one, until there were none left and I'm still getting this runtime error. All rights reserved.

Free() Invalid Pointer C++

temp = malloc(sizeof(char)*strlen(a)+1); char *original_temp = temp; while(*temp){ // processing temp++; } free(original_temp); share|improve this answer answered Feb 2 '15 at 2:10 Yu Hao 84.9k20121180 add a comment| up vote 1 For example, if p is a pointer to an integer, the following code is invalid: p = 0; *p = 12; There is no block pointed to by p. Browse other questions tagged c pointers free or ask your own question. I'm running it on a cluster, if that makes any difference.

I took out the strdup call and Valgrind reported no more memory leaks. Who lost to Glass Joe? Can someone explain to me why this code runs into a seg fault? Free Invalid Pointer Glibc Detected How to sample points randomly below a curve?

current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. When you're done with s altogether, you should free it, but you do not have to do that with the return values of strsep. Originally Posted by Adak io.h certainly IS included in some modern compilers. That part confuses yet more people.

I'm running on Fedora 10, 64 bit. Invalid Pointer Error In C What makes up $17,500 cost to outfit a U.S. How can I create a sophisticated table like the one attached? Goldstone modes and Anderson-Higgs mechanism in the context of BCS theory What are the characteristics of a quantum secure protocol?

Error In Free() Invalid Pointer C++

Gaussian white noise (beginner question) more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life How do I know if an app is safe? Free() Invalid Pointer C++ Wind mills in empty fields. What Is Invalid Pointer Coding standard for clarity: comment every line of code?

The code was then calling the uninitialized regions of the array, the values of which looked a lot like the expected input (which is why it took my so long to http://clockworklaw.com/invalid-pointer/invalid-pointer-ie.php EDIT 2 typedef struct { char ** FileNames; int ** Results; int NumOfItems; }WorkItem; typedef struct QI{ WorkItem * workItem; struct QI * NextItem; }QueueItem; typedef struct { QueueItem * Head, the problem is: because i dont know the size of the array of chars that would represent the name i were trying to use dynamic memory using malloc and free in Originally Posted by Bjarne Stroustrup (2000-10-14) I get maybe two dozen requests for help with some sort of programming or design problem every day. Free() Invalid Pointer Aborted (core Dumped)

Heap memory lives from when you malloc it to when you free it. anyway i return to the books\youtube... –Rafael Shaked Greenfeld Aug 10 at 18:40 A lot of people have trouble with pointers. share|improve this answer edited Nov 30 '13 at 7:06 answered Nov 30 '13 at 7:01 user529758 That worked. check over here asked 3 months ago viewed 82 times active 3 months ago Related 293What REALLY happens when you don't free after malloc?212How does free know how much to free?1free() invalid pointer1free() invalid

Starting off with shimano gears Why is onboard/inflight shopping still a thing? Attempt To Free Invalid Pointer I think the caller would just assign the return value (which is always NULL) to the variable. –PermanentGuest Jun 1 '12 at 15:17 1 ^ that's exactly what I'm doing, share|improve this answer edited Jun 1 '12 at 19:27 answered Jun 1 '12 at 19:16 Jis Ben 12517 add a comment| up vote 0 down vote accepted Somewhere, deep, deep, in

Try running your code under valgrind. –Paul R Jun 1 '12 at 14:59 Maybe it's a double-free?

Both of these lines say "allocate enough space for a Queue, and set the queue pointer retval to point to it". asked 4 years ago viewed 22387 times active 4 years ago Get the weekly newsletter! Join them; it only takes a minute: Sign up c: free() - glibc invalid pointer up vote -1 down vote favorite I am writing a bit of code, in this case Invalid Pointer Windows 7 Login more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Why no trees? When do pilots actually use ‘wilco’? up vote 1 down vote favorite void resolve_paths(char* inputdir) { char** tokens = malloc(64*sizeof(char*)); char* ptr; char* slash = "/"; int i = 0; ptr = strtok(inputdir,slash); while(ptr != NULL){ if(strcmp(ptr,"~") this content Keep up to date on: Latest Buzz Stuff Shows & Podcasts Tours Weird & Wacky Sign-up Now!

Right, I was trying to get p2 to be a pointer to z and get in some practice with malloc. Queue * Queue_Init(pthread_mutex_t * mutex) { Queue * retval = (Queue *)malloc(sizeof(Queue *)); retval->Head = retval->Tail =NULL; retval->QueMutex = mutex; return retval; } void Enqueue (Queue * Q, WorkItem * WI) In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms Browse other questions tagged c compiler-errors free or ask your own question.

It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions. Below is just a test code that I've been playing around with to try and fix the problem (it's the same problem in my current project's code, this is just a Mainly, I was hoping someone has some insight as to why this error is occurring even after all free()s have been removed from my code. Likely you are accessing some memory you don't own.