C - memset segfault for statically allocated char array

Posted by user1327031 on Stack Overflow See other posts from Stack Overflow or by user1327031
Published on 2012-04-11T16:48:00Z Indexed on 2012/04/11 17:29 UTC
Read the original article Hit count: 171

Filed under:

memset

I get a segfault when trying to memset an array of chars that was allocated statically, but not for an array of the same length that was allocated using malloc.

variable definitions:

    //static
    char inBuff[IN_BUFF_LEN];
    //dynamic
    char * inBuffD;

function call:

    //static, cast used because char** != char (*) [n]
    serverInit(portNum, (char**) &inBuff, &serv_addr, &sockfd)
    //dynamic
    serverInit(portNum, &inBuffD, &serv_addr, &sockfd)

use within the function:

    memset(*inBuffAdr, 0, IN_BUFF_LEN);

I suspect that my problem is in the difference of the function calls, or to be more precise, my incomplete understanding of the "char** != char (*) [n]" situation. But I have been banging at this for too long and can't see the forest from the trees so any hints and advice would be very appreciated.

Related posts about segmentation-fault

How to catch segmentation fault in Linux?

as seen on Stack Overflow - Search for 'Stack Overflow'
I need to catch segmentation fault in third party library cleanup operations. This happens sometimes just before my program exits, and I cannot fix the real reason of this. In Windows programming I could do this with __try - __catch. Is there cross-platform or platform-specific way to do the same… >>> More
gcc -fstack-check causes segmentation fault ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have got a segmentation fault even with a "Hello World!" program sometimes. The interesting thing is that the segmentation fault not always shows up. Does there are some kind of famout bug on this flag? My gcc version is 4.1.1 with redhat 64bit. >>> More
Segmentation fault on the server, but not local machine

as seen on Stack Overflow - Search for 'Stack Overflow'
As stated in the title, the program is working on my local machine (ubuntu 9.10) but not on the server (linux). It's a grid hosting hosting package of godaddy. Please help.. Here is the code: #include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { long offset; … >>> More
Segmentation Fault (C) occur on the server, but works on local machine

as seen on Stack Overflow - Search for 'Stack Overflow'
As stated in the title, the program is working on my local machine (ubuntu 9.10) but not on the server (linux). It's a grid hosting hosting package of godaddy. Please help.. Here is the code: #include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { long offset; … >>> More
Why this generates segmentation fault?

as seen on Stack Overflow - Search for 'Stack Overflow'
#include<stdio.h> void foo(int **arr) { arr[1][1]++; } main() { int arr[20][20]; printf("%d\n",arr[1][1]); foo((int**)arr); printf("%d\n",arr[1][1]); } >>> More

Developer IT