On Thu, 3 Jun 2004, Bil Lewis wrote:
I've written a new kind of debugger -- it records state changes
and allows the programmer to essentially "go backwards in time."
Cf. <http://www.uwsg.iu.edu/hypermail/linux/kernel/9901.2/0531.html>:
# I have enough information available in the proxy ptrace filter to
# implement PTRACE_SINGLESTEP_BACKWARDS. How would you like to have that
# capability in gdb? "Execute backwards until this data watchpoint
# changes." Imagine a graphical debugger with a scrollbar for time,
# where the top is "beginning of execution" and the bottom is "end of
# execution."
(very specific to Linux 1.3.42, and with other limitations).