The latest gdb version 7.0 (released this week) supports reverse debugging on a number of platforms (eg. native i386 and x86_64 linux, VMware workstation, UndoDB, and Simics simulators from Virtutech). ftp://ftp.gnu.org/pub/gdb It works with the latest preview / pre-release of VMware workstation 7.0, which also supports reverse debugging of MSWindows guests using Visual Studio debugger. … Read more
I’m a gdb maintainer and one of the authors of the new reverse debugging. I’d be happy to talk about how it works. As several people have speculated, you need to save enough machine state that you can restore later. There are a number of schemes, one of which is to simply save the registers … Read more
It seems that there is no other solution except a CPU that supports it. More precisely, your kernel has to support Intel Processor Tracing (Intel PT). This can be checked in Linux with: grep intel_pt /proc/cpuinfo See also: https://unix.stackexchange.com/questions/43539/what-do-the-flags-in-proc-cpuinfo-mean The commands only works in record btrace mode. In the GDB source commit beab5d9, it is … Read more