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rename-recast.md

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User interactive renaming/retyping assistance

  • Set type on rename : When user rename a local/global variable or a struct member, and new name is equal to known struct or proc typename this type pointer automatically will be applied to the variable. Then new name is ended with '_' and name is matched with any struct typename, this struct type will be applied to the renamed variable.

⚠️ Notes:

  • Struct member renaming callbacks is broken in IDA 8.4.
  • Name must exactly match typename. Case sensitive.
  • Be careful with short names like "exp" that is part of standard C library. Renaming var to such name will recast it to type "double (__cdecl *exp)(double X)"
  • There is a many years long bug in IDA calling "lxe_lvar_name_changed" event callback with wrong lvar_t* argument. I've tried to make workaround for this bug, but it not always works well. The side effect of this bug: you have renamed or retyped one argument of func, but results are two arguments renaming/retyping. To deal with it: undo the operation with "Ctrl-Z", set simple name like "x" for the second argument, then rename first of them as you wish.
  • Rename on set type : When user set named type to Bad-Named local variable this variable will be automatically renamed to typename.
  • Rename VTBL method proc when VTBL struct member is renamed : When user renames member of structure which is VTBL description, corresponding proc is renamed too.
  • Inverse: Rename VTBL struct member when related proc is renamed by user.
  • Change type of VTBL struct member when corresponding proc type is changed.
  • Change return type of constructor proc when it renamed to className::ctor . When you are see a constructor proc you can rename it to something like MyClass::ctor, the return type of this proc be automatically changed to MyClass*