pike.git/ src/ stralloc.c

2013-03-12

2013-03-12 22:42:10 by Arne Goedeke <el@laramies.com>

• 0a146b6e76604a8e920bcb74e40e8633540a2bc4 (3 lines) (+2/-1) ^{[ Show | Annotate ]}
  Branch: 7.9

pike_memory: add guaranteed_memset()

Most compilers (gcc in recent versions) optimize away memset before
free. This can prevent sensitive data from being wiped.

1121:    if (!(s->flags & STRING_NOT_SHARED))    unlink_pike_string(s);    if (s->flags & STRING_CLEAR_ON_EXIT) -  MEMSET(s->str, 0, s->len<<s->size_shift); +  guaranteed_memset(s->str, 0, s->len<<s->size_shift);    free_unlinked_pike_string(s);    GC_FREE_SIMPLE_BLOCK(s);   }