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Bus Error C


Update user password programmatically Meaning of '2> >(command)' Redirection in Bash Why do solar planes have many small propellers instead of fewer large ones? Thanks in advance. Not the answer you're looking for? I also used the following link to figure out how to copy a string to an array: stackoverflow.com/questions/1088622/… –GeekyOmega Jul 30 '12 at 19:44 I have to admit, this

Printing the low order bits of the address shows that it is not aligned to a word boundary ("dword" using x86 terminology). It doesn't matter how "fast" the program runs. Unaligned access[edit] Most CPUs are byte-addressable, where each unique memory address refers to an 8-bit byte. The kernel does not reschedule the process until it's flagged SIGSEGV on it, and the first thing it does when rescheduled is run the signal handler, which does the core dump.

Linux Bus Error (core Dumped)

If the return value is zero, then the EOF has been reached. If you need to debug your program, you may want to enable a core dump. accessing a memory-mapped file or executing a binary image which has been truncated while the program was running),[2] or because a just-created memory-mapped file cannot be physically allocated, because the disk share|improve this answer answered Mar 16 '15 at 11:38 oromoiluig 646 add a comment| up vote 0 down vote My reason for bus error on Mac OS X was that I

For instance, you're more likely to get a bus error on Sparc because pointers have to be word-aligned on Sparc, I think. The time now is 04:06 AM. Would you care to expand? 12-10-2006 #9 sl4nted View Profile View Forum Posts Registered User Join Date Nov 2006 Posts 176 Code: input = fopen("LMC.s","r"); output = fopen("LMC.o","w"); Code: if ((input Bus Error Vs Segmentation Fault A better way to read a file is with fread() (see http://www.cplusplus.com/reference/clibrary/cstdio/fread/).

SIGBUS means that you have asked to cpu to do something that is impossible. Bus Error In Linux Faq Reply With Quote August 14th, 2004,02:33 PM #2 DaWei_M View Profile View Forum Posts Visit Homepage  Lord of Dorkness Devshed Supreme Being (6500+ posts)      sptr = (short *)(((char *)sptr) + 1); *sptr = 100; */ return 0; } Compiling and running the example on a POSIX compliant OS on x86 demonstrates the error: $ gcc you allocate the array to hold 5049 pointers, but you simply read however much is in the file - there's no checking for whether or not you read the expected number

This should be enough to help you figure out the error yourself, which in the long run is much better than asking others. Bus Error 10 Mac Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view menu Whirlpool Go to navigation Whirlpool Search Forums Archive Programming C/C++ "Bus error" when running C program Archive share|improve this answer edited Dec 17 '14 at 8:36 answered Oct 17 '08 at 14:58 unwind 258k39338464 1 In case, I had data[8]; This is now a multiple of 4 Not the answer you're looking for?

  1. What would have been the behavior on a non-buggy OS? –Calvin Huang Feb 17 '14 at 0:55 add a comment| up vote 3 down vote One classic instance of a bus
  2. share|improve this answer edited Jul 30 '12 at 18:42 answered Jul 30 '12 at 18:37 Gene 30.4k32958 Thank you.
  3. Most CPUs can access individual bytes from each memory address, but they generally cannot access larger units (16 bits, 32 bits, 64 bits and so on) without these units being "aligned"
  4. Remove advertisements Sponsored Links Perderabo View Public Profile Find all posts by Perderabo
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  • Could it be caused by [lack of] disk space?
  • Otherwise, I feel I am just using black magic and not understanding the principles of C well. :-( –GeekyOmega Jul 30 '12 at 19:45 You gotta figure out pointers
  • Could California Ratify the Paris Agreement?
  • My problem comes when I run it with ./blah command.
  • Bus Error In Linux

    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 You set up an uint8_t array, add one, two, or three to the array's pointer and then typecast to a short, int, or long and try to access the offending result.) Linux Bus Error (core Dumped) It ran nearly to normal completion time, then simply poo-pood. How To Debug Bus Error Accordingly, the CPU sets this physical address on its address bus and requests all other hardware connected to the CPU to respond with the results, if they answer for this specific

    share|improve this answer edited Oct 7 at 14:58 answered Aug 7 '15 at 12:00 Ciro Santilli 烏坎事件2016六四事件 法轮功 55.8k10239183 add a comment| up vote 1 down vote A specific example of I didn't do anything else. But the great error is that you put the final condition !feof(), whichout checking that the limit of the string array gives overflow. Magento 2: how to make a module compatible with Varnish Cache? How To Solve Bus Error In Linux

    This book is dated, but it remains very useful, and no C text that I've seen is more succinct. Code: #ifdef __STDC__ #define PROTOTYPICAL #endif #ifdef __cplusplus #define PROTOTYPICAL #endif #include #include #include #ifdef PROTOTYPICAL int main(int argc, char *argv[]) #else main(argc,argv) char *argv[]; #endif { double User #80562 1160 posts erroneousBollock Whirlpool Enthusiast reference: whrl.pl/ROZ8Q posted 2006-Mar-31, 3:19 pm AEST ref: whrl.pl/ROZ8Q posted 2006-Mar-31, 3:19 pm AEST For anyone who looks at this thread later, it Attempting to access a unit larger than a byte at an unaligned address can cause a bus error.

    Join them; it only takes a minute: Sign up What is a bus error? Bus Error (core Dumped) C Faq Reply With Quote Share This Thread  Tweet This + 1 this Post To Linkedin Subscribe to this Thread  Subscribe to This Thread « Previous Thread | Next Thread In the case that it may make a difference, it's a job that interfaces with an Oracle database on HP-UX 11.

    You might want to type 'fs lq' and find out how many blocks (kilobytes) you have available in your quota.

    In linux it would run through fine and have a segmentation fault when the program terminated. edit: reduced codeminimal code#include #include #include int main(void) { FILE *f1; char *c; f1 = fopen ("out.txt", "r"); while (fgets(c,10,f1) != NULL) The error I get is simple. Bus Error (core Dumped) Ubuntu Quick Navigation C Programming Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums General Programming Boards C++ Programming C Programming C# Programming Game Programming Networking/Device Communication

    Forget I mentioned it. share|improve this answer answered Jun 16 at 3:39 goCards 91949 add a comment| up vote 0 down vote A typical buffer overflow which results in Bus error is, { char buf[255]; By "access" I guess you mean trying to store something there. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.

    There are two problems with that: you are overwriting the value everytime a new string is read and the buffer is in the stack, and is invalid once the function returns. There is no need to even attempt to convert the virtual address to a physical address. Contents 1 Causes 1.1 Non-existent address 1.2 Unaligned access 1.3 Paging errors 2 Example 3 References Causes[edit] There are at least three main causes of bus errors: Non-existent address[edit] Software instructs char *c; You have not allocated any memory for your string.fgets does not allocate memory for you: fgets() reads in at most one less than size characters from stream and stores

    share|improve this answer edited Oct 20 '12 at 16:16 md5 17.5k22071 answered Jun 26 '12 at 8:51 Vinaya Sagar 171 Heh...if this were the case, you'd have BUS error This is an example of register indirect addressing. using an uninitialized hence bogus pointer.