Viewing a dynamically-allocated array with the Xcode debugger?
You can use gdb syntax as expressions:
- Use Run/Show/Expressions... menu to show the expressions window
- Enter
'*velocity @ 100'
at the bottom of the window (Expression:)
As of Xcode 10, you can right-click velocity
, choose "View value as..." and then "Custom Type". Then cast it to (double(&)[100]) *velocity
and display the array in the GUI.
I think that my answer will be a good addition for the old one.
New versions of Xcode use lldb
debugger as default tool instead of gdb
.
According this page:
With the release of Xcode 5, the LLDB debugger becomes the foundation for the debugging experience on OS X.
So for Xcode since version 5 and up I use this lldb
command:
memory read -t int -c8 `array_name`
where:8
- the number of elements in arrayarray_name
- the name of arrayint
- the type of array
The result of execution of this command will be something like this:
(lldb) memory read -t int -c8 array
(int) 0x7fff5fbff870 = 7
(int) 0x7fff5fbff874 = 6
(int) 0x7fff5fbff878 = 9
(int) 0x7fff5fbff87c = 10
(int) 0x7fff5fbff880 = 1
(int) 0x7fff5fbff884 = 8
(int) 0x7fff5fbff888 = 4
(int) 0x7fff5fbff88c = 3