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| -rw-r--r-- | doc/debugging/coredump-analysis.md | 31 |
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diff --git a/doc/debugging/coredump-analysis.md b/doc/debugging/coredump-analysis.md new file mode 100644 index 00000000000..f9ecf73216e --- /dev/null +++ b/doc/debugging/coredump-analysis.md @@ -0,0 +1,31 @@ +This document explains how to analyze core-dumps obtained from regression +machines, with examples. +1) Download the core-tarball and extract it. +2) 'cd' into the root of extracted tarball. +~~~ +[root@atalur Downloads]# pwd +/home/atalur/Downloads +[root@atalur Downloads]# ls +build build-install-20150625_05_42_39.tar.bz2 lib64 usr +~~~ +3) Determine the core file you need to examine. There can be more than one core file. +You can list them from './build/install/cores' directory. +~~~ +[root@atalur Downloads]# ls build/install/cores/ +core.9341 liblist.txt liblist.txt.tmp +~~~ +In case you are unsure which binary generated the core-file, executing 'file' command on it will help. +~~~ +[root@atalur Downloads]# file ./build/install/cores/core.9341 +./build/install/cores/core.9341: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, from '/build/install/sbin/glusterfsd -s slave26.cloud.gluster.org --volfile-id patchy' +~~~ +As seen, the core file was generated by glusterfsd binary, and path to it is provide (/build/install/sbin/glusterfsd). +4) Now, run the following command on the core: +~~~ +gdb -ex 'set sysroot ./' -ex 'core-file ./build/install/cores/core.xxx' <target, say ./build/install/sbin/glusterd> +In this case, +gdb -ex 'set sysroot ./' -ex 'core-file ./build/install/cores/core.9341' ./build/install/sbin/glusterfsd +~~~ +5) You can cross check if all shared libraries are available and loaded by using 'info sharedlibrary' command from +inside gdb. +6) Once verified, usual gdb commands based on requirement can be used to debug the core. |