greglaw99

This https://plugins.jetbrains.com/plugin/14767-time-travel-debug... gives time travel debugging for IntelliJ. (Disclaimer, I work for Undo.)

I don't think there is a solution for PyCharm.

Have you ever used time-travel debugging? Core dumps give you a backtrace (assuming stack is sane) which gives some clue of how I got here, but not _why_ I got here. e.g. assertion failure. I wrote that assertion because I believed this thing would always be true. Now I find it is not true. From a corefile I can't usually see why it not true.

With a time travel recording I can put a watchpoint (aka data breakpoint) on the state that is supposedly impossible, and reverse-continue back to see exactly where it got set. (And repeat as required.) It really is very powerful.

Admittedly there are situations in which it's not practical to get a recording, but when you can... almost any bug becomes trivial.

IntelliJ can do time travel if you install the plugin: https://plugins.jetbrains.com/plugin/14767-time-travel-debug...

Exactly. Except there are sources of non-determinism other than syscalls. Namely asynchronous signals, thread ordering, shared memory and non-deterministic instructions. They can all be dealt with though.

http://undo.io and http://rr-project.org both support self-modifying code.

I am a co-founder of undo.io, many of our customers do this.

It's not as bad as it first sounds because the replay of the program will modify itself deterministically. (Though as always with this stuff, there are some gotchas.)

Visual Studio Code on Linux works really well and is increasingly popular, also a shout out for C-Lion. Eclipse is, umm, eclipsed by them both IMO.

My subjective opinion is that C-Lion is just a little bit more solid/complete, but Microsoft are investing heavily in VScode. It's great to see some serious competition by two well-resourced players working on this stuff.

Personally I'm always happiest with GDB tui. It's all the standard arguments of command-line vs GUI. When you know what you're doing CLI (with tab-complete) is just a faster way to accomplish the task, but when you're a noobie or an infrequent user the GUI wins because it's so much more discoverable.

Here you go - https://undo.io/java Please excuse shameless plug :-)