[[!meta copyright="Copyright © 2010, 2011 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] # Existing We have debugging infrastructure. For example: * [[GDB]] * [[GNU Mach debugging|microkernel/mach/gnumach/debugging]] * [[GNU Hurd debugging|hurd/debugging]], including [[hurd/debugging/rpctrace]], and more. # To Do * [[ltrace]] * [[latrace]] * [[profiling]] * *Checkpoint/restart allows the state of a set of processes to be saved to persistent storage, then restarted at some future time* -- quoting from Jonathan Corbet's [2010 Linux Kernel Summit report](http://lwn.net/Articles/412749/). This is surely a very useful facility to have for reproducing failures, for example. But on the other hand it's questionable how it can help with debugging failures in [[GNU Hurd server|hurd/translator]]s' interactions, as their state is typically spread between several processes. Continues: , which introduces . * [[crash_server}}, [[GDB_gcore]], * [[community/gsoc/project_ideas/libdiskfs_locking]] * , or -- just two examples; there's a lot of such stuff for Linux. * [[debugging_gnumach_startup_QEMU_GDB]]