Linux Program Received Signal Sigbus Bus Error
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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 operating system
Bus Error C++
(OS) that a process is trying to access memory that the CPU bus error in linux cannot physically address: an invalid address for the address bus, hence the name. In modern use on most linux bus error core dumped architectures these are much rarer than segmentation faults, which occur primarily due to memory access violations: problems in the logical address or permissions. On POSIX-compliant platforms, bus errors usually result in
How To Debug Bus Error
the SIGBUS signal being sent to the process that caused the error. 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 a bug in a program's source code.[citation needed] Bus errors may also be raised for certain other paging
How To Solve Bus Error In Linux
errors; see below. 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 the CPU to read or write a specific physical memory address. 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 address. If no other hardware responds, the CPU raises an exception, stating that the requested physical address is unrecognized by the whole computer system. Note that this only covers physical memory addresses. 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 the difference. Unaligned access[edit] Most CPUs are byte-addressable, where each unique memory address refers to an 8-bit byte. Most CPUs can access individual bytes from each memory address, but they generally cannot access larger units (16 bits, 32 bits, 64 bits and
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Bus Error Vs Segmentation Fault
Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million bus error 10 mac 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 https://en.wikipedia.org/wiki/Bus_error fault? Can it 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 58.2k10127202 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 http://stackoverflow.com/questions/838540/bus-error-vs-segmentation-fault is that: a SEGV is 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 491k1189731422 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 err
get tips & solutions from a community of 418,583 IT Pros & Developers. It's quick & easy. SIGBUS, Bus https://bytes.com/topic/c/answers/686348-sigbus-bus-error error. P: n/a contactmayankjain Hi, I am getting the following error. Can https://sourceware.org/bugzilla/show_bug.cgi?id=228 you tell me any solution to this problem and the reason for this 298 Program received signal SIGBUS, Bus error. 0x000000080137ae02 in __gnu_cxx::__exchange_and_add () from /usr/lib/libstdc++.so.5 (gdb) bt #0 0x000000080137ae02 in __gnu_cxx::__exchange_and_add () from /usr/lib/libstdc++.so.5 #1 0x00000000008a3ead in PContainer::Destruct () #2 0x000000000044e278 in ~PAbstractArray ( this=0x7fffffffdbb8) at array.h:171 #3 bus error 0x000000000046b947 in ~PBaseArray (this=0x7fffffffdbb8) at array.h:849 #4 0x00000000004af257 in ~PBYTEArray (this=0x7fffffffdbb8) at h4504.cxx:155 #5 0x00000000004af86c in ~PASN_OctetString ( this=0x7fffffffdb90) at h4504.cxx:155 #6 0x00000000004bb8af in ~H225_H323_UserInformation_user_data (this=0x7fffffffda68) at h450pdu.cxx:389 #7 0x00000000004bae0f in ~H225_H323_UserInformation ( this=0x7fffffffcc40) at h225_1.cxx:8157 Thanks Regards Mayank Jain Aug 1 '07 #1 Post Reply Share this Question 10 Replies P: n/a Ian Collins co***************@gmail.com wrote: > Hi, I am bus error in getting the following error. Can you tell me any solution to this problem and the reason for this You have an error at line 42 of your code. For better help, post a minimal example that gives the problem. -- Ian Collins. Aug 1 '07 #2 P: n/a contactmayankjain On Aug 1, 2:33 pm, Ian Collins
[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 ()