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Bus Error In C Program


Can I use TV coaxial cable as a Wifi antenna cable? The bus is the connection between the CPU and the memory. I would tend to expect that the situation tonyt is describing would result in a SIGSEGV rather than a SIGBUS....except that if you have a pointer that is both misaligned and Post your code.

From: Here share|improve this answer answered Oct 17 '08 at 14:54 Oli 91.9k44160228 Depends on the nasty tricks you're doing with your code. On linux this gives a segmentation fault(as expected), but on OS X it gives a bus error. Another possible cause is an alignment error. It reported memory problem in readfile, which was a general clue to what specifically has been pointed out wrong above, which is my use of fget().

C Programming Bus Error 10

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 Attempts to branch to an odd address results in a specification exception.[1] Data, however, may be retrieved from any address in memory, and may be one byte or longer depending on A number of your loops are (depending on what values of satir and sutun are input by the user) will access array elements out of bounds.

Printing the low order bits of the address shows that it is not aligned to a word boundary ("dword" using x86 terminology). This is a buffer overflow, which can lead to Bad Things if you clobber something important. Attempting to access a unit larger than a byte at an unaligned address can cause a bus error. Fortran Bus Error Trying to access an undefined virtual memory address is generally considered to be a segmentation fault rather than a bus error, though if the MMU is separate, the processor can't tell

i guess I should start adopting a more formal style of programming. C Bus Error Core Dumped By using this site, you agree to the Terms of Use and Privacy Policy. If an int is 4 bytes on your system and you try to store an int at random addresses in a read-only segment, then yes 75% of the time you will http://stackoverflow.com/questions/5717176/bus-error-while-running-a-simple-string-c-program Still to me these errors have slightly different meanings, although I must admit that this is based mostly on C programming in an HP-UX environment.

It's a modification of a game I made when I learned Java. Python Bus Error line is deallocated when readFile returns, making those pointers all invalid. –Keith Randall Jul 30 '12 at 18:38 Thanks. share|improve this answer answered Jul 30 '12 at 18:48 Michael Burr 239k30352573 That made my heart sink when I saw I could be using feof not correctly. You should think about allocating the array dynamically as you read the file or have a mechanism to ensure you read the right amount of data (not too little and not

C Bus Error Core Dumped

Core dumps created this way will not take up quota, and they will automatically vanish when the machine is rebooted. https://en.wikipedia.org/wiki/Bus_error Being vulnerable to bus errors is a sign of bad management. C Programming Bus Error 10 Anyone knows the font style here? Bus Error Linux 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"

Unsourced material may be challenged and removed. (July 2015) (Learn how and when to remove this template message) In computing, a bus error is a fault raised by hardware, notifying an I suspect it might have to do with memory or overflowing the buffer, but that's completely unscientific and a gut feeling. Please help improve this article by adding citations to reliable sources. because it has disappeared (e.g. Bus Error 10 Mac

Paging errors[edit] FreeBSD, Linux and Solaris can signal a bus error when virtual memory pages cannot be paged in, e.g. The error I get is simple. 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 Unlike bytes, larger units can span two aligned addresses and would thus require more than one fetch on the data bus.

A more sophisticated method is using 'dbx', a source level symbolic debugger. Bus Error (core Dumped) Ubuntu References[edit] ^ z/Architecture Principles of Operation, SA22-7832-04, Page 6-6, Fifth Edition (September, 2005) IBM Corporation, Poukeepsie, NY, Retrievable from http://publibfp.dhe.ibm.com/epubs/pdf/a2278324.pdf (Retrieved December 31, 2015) ^ https://groups.google.com/group/comp.unix.internals/browse_thread/thread/6369e8f923aedcb0/54f8ed15e326dc0[unreliable source?] v t e Operating For example, for hardware based on the IBM System/360 mainframe, including the IBM System z, Fujitsu B8000, RCA Spectra, and UNIVAC Series 90, instructions must be on a 16-bit boundary, that

That's what is causing the bus error in this case.

Weirder yet is that it complies. Indices for array elements start at zero in C so, if an array has dimension N, valid elements have indices 0 through to N-1. If the kernel wanted to, it could fiddle with things to render the attempted operation legal. Bus Error In Thread Mainthread At Address 0x0 If you need to debug your program, you may want to enable a core dump.

Why? Theoretically, could there be different types of protons and electrons? Should wires be tinned to under the insulation? Password Home Search Forums Register Forum RulesMan PagesUnix Commands Linux Commands FAQ Members Today's Posts UNIX for Dummies Questions & Answers This forum is closed for new posts.

You should not attempt to modify these. share|improve this answer answered Jul 30 '12 at 18:38 AlexDev 1,647820 add a comment| up vote 0 down vote char* array[5049], int x array[x] = fgets(line,256,file) You assign to array[x], which share|improve this answer answered Oct 18 '08 at 17:52 Joshua 18.2k33579 This often happens when I update the .so file while running the process –poordeveloper Aug 11 '15 at Then your following strcat will overflow the stack buffers, which is just as bad.

A minimal example that produces it because ftruncate was forgotten: #include /* O_ constants */ #include /* ftruncate */ #include /* mmap */ int main() { int fd; Working on fix now. (I am learning how to use linux and unix, plus vim). –GeekyOmega Jul 30 '12 at 19:08 add a comment| up vote 0 down vote You are This should be enough to help you figure out the error yourself, which in the long run is much better than asking others. To allow core dumps and still not have quota worries, you can make a symbolic link from the name core into the /tmp directory.

You try this on ARM, MIPS, Power, etc. asked 7 years ago viewed 154116 times active 3 months ago Blog Stack Overflow Podcast #89 - The Decline of Stack Overflow Has Been Greatly… Linked 25 Bus error vs Segmentation Reason: Remove html which is no longer supported Remove advertisements Sponsored Links Perderabo View Public Profile Find all posts by Perderabo #3 11-10-2001 tonyt Registered User Rethink your code if you're having this sort of problem- it's not very performant on X86 to begin with. –Svartalf Dec 16 '14 at 18:31 @Svartalf: On x86, word

Please elaborate, It will help me. –dexterous_stranger Oct 1 '13 at 12:49 Heh. Things that cause bus errors and segmentation violations are typically out-of-bounds array references and/or references through uninitialized or mangled pointers. SIGBUS can also be caused by any general device fault that the computer detects, though a bus error rarely means that the computer hardware is physically broken—it is normally caused by 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

Example[edit] This is an example of unaligned memory access, written in the C programming language with AT&T assembly syntax. #include int main(int argc, char **argv) { int *iptr; char *cptr; What does Billy Beane mean by "Yankees are paying half your salary"? You can trigger a BUS error/Alignment Trap if you do something silly like do pointer math and then typecast for access to a problem mode (i.e. PS: To be more precise this is not manipulating the pointer itself that will cause issues, it's accessing the memory it points to (dereferencing).

C0Bus error: 10.