Xcode LLDB watchpoints

Question

Is there any way to watch a variable in Xcode using LLDB ? Or is this only possible with GDB ? I'm trying to use the command `watchpoint set variable` but I get the message: invalid command 'watchpoint set'

Accepted Answer

Watchpoints are supported for iOS and Mac OS X debugging as of Xcode 4.5. To set a breakpoint on a variable named `foo`, do

```
(lldb) watchpoint set variable foo
```

you can always use the shortest unambiguous name for commands in the lldb console so

```
(lldb) w s v foo
```

would also work here.

In Xcode, in the locals window you can right-click/control-click on variables and you'll have an option to set a watchpoint on it.

The current arm and x86 cpus only support 4 watchpoints being active at the same time.

Xcode LLDB watchpoints

Solution

Problem