Re: [PATCH v5 1/5] perf metric: Event "Compat" value supports matching multiple identifiers

From: John Garry
Date: Wed Aug 02 2023 - 05:44:26 EST

On 02/08/2023 10:38, Jing Zhang wrote:
+    str = strdup(compat);
why duplicate this? are you modifying something?

This is really a redundant step, I will remove it.

Hi John,

I reviewed this code again and found that it still needs to duplicate "compat" because "compat" is a
const str* type and cannot be used as a parameter for the strtok_r function. If it is cast to char*,
using "compat" as a parameter for strtok_r is also unsafe and can cause a "Segmentation fault" error.
Therefore, let's keep the step of duplicating "compat".

ok, so then please add a small comment on why the strdup() call is needed.