I'm using ida 6.8 SDK and i have an problem with saving changed variables names,

I used many functions like set_reg_name(C++), setMemberName(in python), they change the name but not permanently, after pressing refresh , or reopening ida, the variables have old names.

What function is used when u press "N" Rename Iyvar, and were to get info on correct way of saving changed variable names ?

  • As far as I remember there was save_user_lvar_settings for hex rays variables in ida 6.8. I'd suggest to search this function on github - this will probably give you some examples. – w s Apr 22 '18 at 10:06
  • @ws seems a common problem ? the thing is that when i'm trying to use user_lvar_visitor_t ulv;( instead of old lvar_uservec_t lvinf; ) i get error that can't create example of abstract class . And i can't find any valid source, can u point me to correct sources ? – LighFusion Apr 22 '18 at 11:53
  • Unfortunately the only source I know about that should work is related to IDA 7.1 and resides here :github.com/IDArlingTeam/IDArling/blob/master/idarling/core/… – w s Apr 22 '18 at 12:55
  • @ws and that's for python ? i can't make lvinf = ida_hexrays.lvar_uservec_t() the same in C++ ; Also i have found this function - bool __fastcall hexapi rename_lvar(lvar_t *v, const char *name, bool is_user_name); in comments it says //This function permanently renames a local variable. , but how to access it ? i get error not found when i try to use it – LighFusion Apr 22 '18 at 13:06
  • @ws huh finnaly after 2 days of searching, thx to these github.com/REhints/HexRaysCodeXplorer/blob/… guys ! the solutions i to get pointer from pseudo code, and apply vu.rename_lvar(&lvars.at(i), "var_permaNamed", true); Ands thats it! it renames permamently, thanks anyway , – LighFusion Apr 22 '18 at 13:45

Solution is very simple:

  1. get pointer to pseudoview

    vdui_t * vuu= open_pseudocode(func->startEA, 0);

  2. Get Pointer to variables

    lvars_t& lvars = *pFunction->get_lvars();

  3. Simply rename variable

    vuu->rename_lvar(&lvars.at(i), "permanamed", true);

last bool flag in rename_lvar func, operate if renaming is permanent or not .

p.s. Its kind'a bad solution as it require opening pseudo view, but i didn't find any other way to do it permanently , or similiar, working function that set's flag like in rename_lvar func .

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  • I'm having difficulty getting this to work in Python. The function "vuu.rename_lvar" returns true, and I"m using lvars from cfunc.lvars or cfunc.get_lvars(). however, if I use the pop up from vuu.ui_rename_lvar it contains the name that I've attempted to rename it to! so something is happening. – bravosierra99 Oct 21 '19 at 16:35
  • figured it out, if you get your cfunc_t a different way (such as get_func(ea) then it doesn't work! must get it through the vuu object. – bravosierra99 Oct 21 '19 at 17:42

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