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--- notes:tools [2025/05/05 16:35] – Created admin
+++ notes:tools [2025/05/05 20:43] (current) – Update to first person w/ "Mason Jones" header admin
@@ Line 2: / Line 2: @@
 ===== ''rr'' =====
+  * [[https://github.com/rr-debugger/rr|rr debugger on GitHub]]
-- ''rr'' is a time travel debugger that runs native programs with only about a 10% overhead
+  * ''rr'' is a time travel debugger that runs native programs with only about a 50% overhead
-- it uses GDB for its interface
+  * it uses GDB for its interface
-- It's kinda amazing to do ''watch -l someObj->refCount'', use ''rc'' to run backwards, and find exactly where the ''refCount'' was last set
+  * Mason Jones:
-- Rob Fielding uses it as he's been weeding out bugs in ''jimtcl''
+    * I use it as I've been weeding out bugs in ''jimtcl''
+    * I start by setting a breakpoint at the segfault or panic, see what value is messed up, set a watchpoint, and run it backwards until I hit that watchpoint. Then it's a matter of alternating forwards and backwards until I find the exact spot
+    * For example, it's kinda amazing to do ''watch -l someObj->refCount'', use ''rc'' to run backwards, and find exactly where the ''refCount'' was last set