C Bus Error Core Dump
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Bus Error Core Dumped C Programming
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Bus Error Core Dumped Linux
with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million python bus error core dumped 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 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. bus error linux 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 here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs bus error (core dumped) centos Documentation Tags Users Badges 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 Bus error vs Segmentation fault up vote 25 down vote favorite 8 Difference between a bus error and a segmentation fault? Can it http://stackoverflow.com/questions/9985818/why-am-i-getting-core-dumped happen that a program gives a seg fault and stops for the first time and for the second time it may give a bus error and exit ? c share|improve this question edited May 2 '12 at 12:04 casperOne 58k10126202 asked May 8 '09 at 6:56 Thunderboltz 6253915 add a comment| 6 Answers 6 active oldest votes up vote 34 down vote accepted On most architectures I've used, the distinction is that: a SEGV is http://stackoverflow.com/questions/838540/bus-error-vs-segmentation-fault caused when you access memory you're not meant to (e.g., outside of your address space). a SIGBUS is caused due to alignment issues with the CPU (e.g., trying to read a long from an address which isn't a multiple of 4). share|improve this answer answered May 8 '09 at 7:06 paxdiablo 488k1179691416 10 Memory mapped files can also generate SIGBUS. –bk1e May 8 '09 at 16:06 on arm SIGBUS can occur if you read a float from an address that is not 4 byte aligned –shoosh Mar 30 at 7:29 shoosh, I'm pretty certain that's covered by my second bullet point. –paxdiablo Mar 30 at 13:28 add a comment| up vote 11 down vote SIGBUS will also be raised if you mmap() a file and attempt to access part of the mapped buffer that extends past the end of the file, as well as for error conditions such as out of space. If you register a signal handler using sigaction() and you set SA_SIGINFO, it may be possible to have your program examine the faulting memory address and handle only memory mapped file errors. share|improve this answer answered May 8 '09 at 16:04 bk1e 17.9k43760 add a comment| up vote 5 down vote For instance, a bus error might be caused when your program tries to d program yourself, you can skip the rest of this section. For College-supported software, you can report http://www.glue.umd.edu/afs/glue.umd.edu/system/info/olh/Utilities/Unix_answers/unix_bus_or_seg.html the bug by contacting a consultant through olc or "mail staff". ------------------------------------------------------------------------------- If the program displays this 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, which caused bus error 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 common example in C is: int c; scanf("%d", c); instead of the correct version: int c; scanf("%d", &c); An example from bus error core 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 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 ofHow To Debug Bus Error
Bus Error Vs Segmentation Fault