How to generate core dump file in Ubuntu

 

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  • How to generate a core dump in Linux when a process gets a segmentation fault? 9 answers

    • Activate your coredumps by: 

    ulimit -c unlimited

    Also check: 

    $ sysctl kernel.core_pattern

    to see where your dumps are created (%e will be the process name, and %t will be the system time).

    You can change it in /etc/sysctl.conf and then reload by sysctl -p .

    You can test it by: 

    sleep 10 &
killall -SIGSEGV sleep

    If core dumping is successful, you will see “(core dumped)” after the segmentation fault indication.

    See also:

    How to generate a stacktrace when my gcc C++ app crashes

    Ubuntu

    If you've Ubuntu, your dumps are created by apport in /var/crash , but in different format (edit the file to see it).

    Please read more at:

    https://wiki.ubuntu.com/Apport

    OS X

    In OS X, your crash dumps are automatically created by Crash Reporter in form of backtraces. You can find these crash files by executing Console and going to 'User Diagnostic Reports' section (under 'Diagnostic and Usage Information' group) or you can locate them in ~/Library/Logs/DiagnosticReports .

    The actual core files are generated in /cores .

    Read more: How to generate core dumps in Mac OS X?

    Check the ouput of ulimit -c , if it output 0, this is why you don't have core dumped.

    Use

    ulimit -c unlimited

    to allow core creation (maybe replace unlimited by a real size limit to be more secure) .

    使用ulimit -c SIZE设置最大核心转储大小。

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