Bus Error Core Dump In C
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Python Bus Error Core Dumped
Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why am I getting core dumped? [closed] up vote 0 down vote favorite bus error linux Please help me. I can't figure out why I get a core dumped when I run this program. Before returning anything I can print all_albums_p just fine. Why am I getting core dumped? #include "music_server.h" struct album_ { int num_tracks; char **tracks; int **playlist_hits; }; typedef struct album_ album; album *parse_album(FILE *album_file,int *number_of_albums){ int number_of_album,number_of_tracks,number_of_charaters; int i,j; char dummy_space; int *p; fscanf(album_file,"%d", &number_of_album); *number_of_albums = number_of_album; album *all_albums_p = (album *)malloc(sizeof(album)*number_of_album); for(j=0;j Programming Boards C Programming Bus error (Core Dumped) Getting started with C or C++ | C Tutorial | C++ Tutorial | bus error (core dumped) centos C and C++ FAQ | Get a compiler | Fixes for common problems Thread: Bus error bus error vs segmentation fault (Core Dumped) Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 12-10-2006 http://stackoverflow.com/questions/9985818/why-am-i-getting-core-dumped #1 RandomX View Profile View Forum Posts Registered User Join Date Nov 2006 Posts 19 Bus error (Core Dumped) Hey everyone, I am writing a basic program titled, "LMC.c" that takes the contents from a file "LMC.s", and outputs them into another file "LMC.o" Here is the input file, LMC.s Code: INP http://cboard.cprogramming.com/c-programming/86430-bus-error-core-dumped.html 00 STO 90 INP 00 ADD 90 OUT 00 STOP 00 Then here is the program that reads the input file, LMC.c Code: #include program yourself, you can skip the rest of this section. For College-supported software, you can report the bug by contacting a consultant through olc or "mail staff". ------------------------------------------------------------------------------- If the program displays this http://www.glue.umd.edu/afs/glue.umd.edu/system/info/olh/Utilities/Unix_answers/unix_bus_or_seg.html message: Bus error or Segmentation fault or Core dump ... then the program was trying to access a memory location outside its address space. The computer detected this problem and sent a signal to your program, http://forums.devshed.com/programming-42/difference-seg-fault-core-dump-bus-error-174417.html which caused it to abort. Things that cause bus errors and segmentation violations are typically out-of-bounds array references and/or references through uninitialized or mangled pointers. Look very closely in your program for bizarre things like that. A bus error common example in C is: int c; scanf("%d", c); instead of the correct version: int c; scanf("%d", &c); An example from C++ is: int* p=new int[100]; cout<< p[100]; instead of the correct version: int* p=new int[100]; cout << p[99] (remember array referances in C and C++ start with 0 ) There are a number of methods for finding out where the program went out of bounds. One method is to use printf() statements bus error core to determine how far the program is getting before it crashes, and to print out the contents of interesting variables. A more sophisticated method is using 'dbx', a source level symbolic debugger. C and C++ programmers can also use 'gdb'. To learn about 'dbx', you can read the manual pages by using the 'man' command, as in: man dbx To learn about 'gdb', you can read the manual node in the 'xinfo' program, or using 'M-x info' in Emacs. If you need to debug your program, you may want to enable a core dump. Usually, those two messages above would also have "(core dumped)" by them, indicating that the program wrote an image of its current memory into a file called "core" in that directory. You might want to type 'fs lq' and find out how many blocks (kilobytes) you have available in your quota. Then you can type, say: limit coredumpsize 100 .. to limit your core dump size to 100K for your current login. BE CAREFUL not to let yourself go over quota, as you would then not be able to create or edit files. You should delete the "core" file when you don't need it any more. To allow core dumps and still not have quota worries, you can make a symbolic link from Search Username Password Remember Me? Register Lost Password? facebook google twitter rss Free Web Developer Tools Advanced Search Forum Programming Languages C Programming difference between seg fault core dump bus error Thread: difference between seg fault core dump bus error Share This Thread Tweet This + 1 this Post To Linkedin Subscribe to this Thread Subscribe to This Thread August 14th, 2004,01:16 PM #1 No Profile Picture Technical View Profile View Forum Posts Registered User Devshed Newbie (0 - 499 posts) Join Date Aug 2004 Posts 1 Rep Power 0 difference between seg fault core dump bus error Hello C experts, Can I have 3 programs for producing the following errors ? 1. Segmentation fault 2. Core dump 3. Bus error I guess to get case one, *p='a' where p has not been allocated memory will do. How about the others ? Thanks in advance. Faq Reply With Quote August 14th, 2004,01:33 PM #2 DaWei_M View Profile View Forum Posts Visit Homepage Lord of Dorkness Devshed Supreme Being (6500+ posts) Join Date Jan 2004 Location Central New York. Texan via Arizona, out of his element! Posts 8,524 Rep Power 3316 1. Segmentation fault. Attempting to access memory in a segment one isn't allowed to access. 2. Core dump. Typically, an error which causes the OS to dump some contents of memory for trace purposes (often the stack). 'Core' was originally a memory technology which consisted of ferrite (magnetic) toroids with windings to set their direction of magnetization and a sense winding to read the current direction of magnetization. It generally just refers to any memory nowadays. The last core I used was a 256K module about 6 x 10 inches occupying the width of a couple PCI slots in today's PCs. 3. Bus Error. The most common cause is an invalid address alignment reference, although attempting to access a non-existent item at a particular bus address can also produce the fault. EDIT: Core in the original sense is non-volatile. It retains its contents when power is off, like CMOS, but doesn't need a battery. Put your OS in there, voila, no boot required! :D Last edited by DaWei_M; August 14th, 2004 at 02:01 PM. Functionality rules and clarity matters; if you can work a little elegance in there, you're stylin'. If you can't spelHow To Debug Bus Error