Linux Program Terminated With Signal 7 Bus Error
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Bus Error Linux
or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack how to debug bus error Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What is a bus error? up vote bus error vs segmentation fault 156 down vote favorite 49 What does the "bus error" message mean, and how does it differ from a segfault? c unix segmentation-fault bus-error share|improve this question edited Oct 18 '15 at 10:44 Cool Guy 15.7k51952 asked Oct 17 '08 at 14:48 raldi 7,272216178 add a comment| 15 Answers 15 active oldest votes up vote 151 down vote accepted Bus errors are rare nowadays on x86 and
How To Fix Bus Error In Linux
occur when your processor cannot even attempt the memory access requested, typically: using a processor instruction with an address that does not satisfy its alignment requirements. Segmentation faults occur when accessing memory which does not belong to your process, they are very common and are typically the result of: using a pointer to something that was deallocated. using an uninitialized hence bogus pointer. using a null pointer. overflowing a buffer. 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). share|improve this answer edited Oct 17 '08 at 15:18 answered Oct 17 '08 at 15:12 bltxd 5,72322336 52 They aren't rare; I'm just at Exercise 9 from How to Learn C the Hard Way and already encountered one... –11684 Mar 26 '13 at 20:12 5 Another cause of bus errors (on Linux anyway) is when the operating system can't back a virtual page with physical memory (e.g. low-memory conditions or out of huge pages when using huge page memory.) Typically mmap (and malloc) just reserve the virtual address space, and the kernel assigns the physical memory on demand (so called soft
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Bus Error Signal 7
Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access http://stackoverflow.com/questions/212466/what-is-a-bus-error many other special features. Registration is quick, simple and absolutely free. Join our community today! Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us. If you http://www.linuxquestions.org/questions/programming-9/bus-error-caused-by-memcpy-603574/ need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Search this Thread 11-30-2007, 02:12 PM #1 toubo LQ Newbie Registered: Aug 2004 Posts: 10 Rep: Bus error caused by memcpy Hi, I wrote a data distribution software running on a Linux 2.6.16 kernel (in a x86 PC). In most of the system, it would run fine; however, in some, it would genera
Post #1 of 4 (4105 http://www.gossamer-threads.com/lists/apache/users/401134 views) Permalink Program terminated with signal 7, Bus error. Hi. I run RHEL v5.6 and can see this kind of entries in my https://sourceware.org/bugzilla/show_bug.cgi?id=228 apache error_log: [Sun Jul 31 23:27:44 2011] [notice] child pid 6974 exit signal Bus error (7), possible coredump in /tmp/httpd-gdb-dump [Sun Jul bus error 31 23:27:44 2011] [notice] child pid 6976 exit signal Bus error (7), possible coredump in /tmp/httpd-gdb-dump [Sun Jul 31 23:27:44 2011] [notice] child pid 6979 exit signal Bus error (7), possible coredump in /tmp/httpd-gdb-dump I've turned on coredump as you can see, and installed lots of linux program terminated debuginfo packages (although not all of them). After the core is generated, this is what I get with gdb: warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff930f000 Core was generated by `/usr/sbin/httpd'. Program terminated with signal 7, Bus error. #0 0x00002b66739c139b in memcpy () from /lib64/libc.so.6 (gdb) bt #0 0x00002b66739c139b in memcpy () from /lib64/libc.so.6 #1 0x00002b6677e46584 in php_ob_append (str=0x2b6685903000
, str_length=2270) at /usr/include/bits/string3.h:51 #2 php_b_body_write (str=0x2b6685903000 , str_length=2270) at /usr/src/debug/php-5.3.3/main/output.c:682 #3 0x00002b6677e4a7ba in _php_stream_passthru (stream=0x2b667ea474b8) at /usr/src/debug/php-5.3.3/main/streams/streams.c:1220 #4 0x00002b6677de0839 in zif_readfile (ht=[x] Bug228 - bus error signal during unaligned memory access... Summary: bus error signal during unaligned memory access... Status: RESOLVED WORKSFORME Alias: None Product: glibc Classification: Unclassified Component: libc (show other bugs) Version: unspecified Importance: P2 critical Target Milestone: --- Assignee: GOTO Masanori URL: Keywords: Depends on: Blocks: Reported: 2004-06-19 20:59 UTC by Pawel Sikora Modified: 2004-06-23 07:24 UTC (History) CC List: 1 user (show) glibc-bugs See Also: Host: sparc64-pld-linux Target: sparc64-pld-linux Build: sparc64-pld-linux Last reconfirmed: Attachments Add an attachment (proposed patch, testcase, etc.) Note You need to log in before you can comment on or make changes to this bug. Description Pawel Sikora 2004-06-19 20:59:06 UTC # glibc-2.3.4-snap20040612, 4 x TI UltraSparc II (BlackBird) # gdb ./msgfmt (...) This GDB was configured as ""...Using host libthread_db library "/lib64/libthread_db.so.1". (gdb) set args -o pl.gmo pl.po (gdb) r Starting program: /home/users/support2/rpm/bus_error/msgfmt -o pl.gmo pl.po Program received signal SIGBUS, Bus error. 0xfffff80000416f28 in read () from /lib64/libc.so.6 (gdb) bt #0 0xfffff80000416f28 in read () from /lib64/libc.so.6 #1 0xfffff800003c5ac4 in _IO_file_read () from /lib64/libc.so.6 #2 0xfffff800003c4d68 in _IO_file_underflow () from /lib64/libc.so.6 #3 0xfffff800003c6b94 in _IO_default_uflow () from /lib64/libc.so.6 #4 0xfffff800003c69c4 in __uflow () from /lib64/libc.so.6 #5 0xfffff8000010f5cc in po_callback_comment_dispatcher () from /usr/lib64/libgettextsrc-0.14.1.so #6 0xfffff8000010fc08 in lex_end () from /usr/lib64/libgettextsrc-0.14.1.so #7 0xfffff8000010fddc in po_gram_lex () from /usr/lib64/libgettextsrc-0.14.1.so #8 0xfffff8000011136c in po_gram_parse () from /usr/lib64/libgettextsrc-0.14.1.so #9 0xfffff8000010e270 in po_scan () from /usr/lib64/libgettextsrc-0.14.1.so #10 0x00000000001071e8 in read_po_file_msgfmt (filename=0x7fffffffc9e "