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Analysts of crash dumps from Linux systems can use kdump or the Linux Kernel Crash Dump (LKCD). [10] Core dumps can save the context (state) of a process at a given state for returning to it later. Systems can be made highly available by transferring core between processors, sometimes via core dump files themselves.
In the event of a kernel crash, kdump preserves system consistency by booting another Linux kernel, which is known as the dump-capture kernel, and using it to export and save a memory dump. As a result, the system boots into a clean and reliable environment instead of relying on an already crashed kernel that may cause various issues, such as ...
Kernel crash dump Kernel debugger ... System core dump [17] mdb ereport ... S+core Tilera C6X; mmu no-mmu x86 x86-64 mmu no-mmu 32-bit
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("dead feed") is used by Apple in iOS crash reports, when a timeout occurs spawning a service. 0xDECAFBAD: 3737844653 ("decaf bad") is often found in coding as an easily recognized magic number when hex dumping memory. 0xDEFEC8ED: 3741239533 ("defecated") is the magic number for OpenSolaris core dumps. [26] 0xD0D0CACA: 3503344330
If the user chooses to report the crash, the details (possibly including a core dump) will be uploaded to an Ubuntu server (daisy.ubuntu.com) for analysis. [7] A core dump is automatically processed to create a stack trace and crash signature.
In computing, a crash, or system crash, occurs when a computer program such as a software application or an operating system stops functioning properly and exits. On some operating systems or individual applications, a crash reporting service will report the crash and any details relating to it (or give the user the option to do so), usually to ...
Processes can in some cases install a custom signal handler, allowing them to recover on their own, [1] but otherwise the OS default signal handler is used, generally causing abnormal termination of the process (a program crash), and sometimes a core dump.