Compiler reports that variable htab_sz [1] is unused. Looking at the surrounding code, it would make sense to put it to use.

[1] https://github.com/openjdk/jdk/blob/2342684f2cd91a2e5f43dd271e95836aa78e7d0a/src/jdk.hotspot.agent/linux/native/libsaproc/symtab.c#L386