Mercurial > vim
comparison src/eval.c @ 28968:3043a3e2ef95 v8.2.5006
patch 8.2.5006: asan warns for undefined behavior
Commit: https://github.com/vim/vim/commit/68e64d2c1735f2a39afa8a0475ae29bedb116684
Author: Bram Moolenaar <Bram@vim.org>
Date: Sun May 22 22:07:52 2022 +0100
patch 8.2.5006: asan warns for undefined behavior
Problem: Asan warns for undefined behavior.
Solution: Cast the shifted value to unsigned.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Sun, 22 May 2022 23:15:03 +0200 |
| parents | 8973f2f00872 |
| children | 45c182c4f7e9 |
comparison
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| 28967:13d66390ef26 | 28968:3043a3e2ef95 |
|---|---|
| 3087 if (var2.vval.v_number > MAX_LSHIFT_BITS) | 3087 if (var2.vval.v_number > MAX_LSHIFT_BITS) |
| 3088 // shifting more bits than we have always results in zero | 3088 // shifting more bits than we have always results in zero |
| 3089 rettv->vval.v_number = 0; | 3089 rettv->vval.v_number = 0; |
| 3090 else if (type == EXPR_LSHIFT) | 3090 else if (type == EXPR_LSHIFT) |
| 3091 rettv->vval.v_number = | 3091 rettv->vval.v_number = |
| 3092 rettv->vval.v_number << var2.vval.v_number; | 3092 (uvarnumber_T)rettv->vval.v_number << var2.vval.v_number; |
| 3093 else | 3093 else |
| 3094 rettv->vval.v_number = | 3094 rettv->vval.v_number = |
| 3095 (uvarnumber_T)rettv->vval.v_number >> var2.vval.v_number; | 3095 (uvarnumber_T)rettv->vval.v_number >> var2.vval.v_number; |
| 3096 } | 3096 } |
| 3097 | 3097 |