You can also test with setting the "target.run-args":
(lldb) settings set target.run-args "one 1" 'two 2' three
(lldb) settings show target.run-args
target.run-args (arguments) =
[0]: "one 1"
[1]: "two 2"
[2]: "three"
http://reviews.llvm.org/D8265
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