tree e567ee96881390a88de5504ae88fbe3c809624a2
parent 480416af9d4acb874d5f60bb725334f71103daf7
author Gilles Peskine <Gilles.Peskine@arm.com> 1530207091 +0200
committer itayzafrir <itay.zafrir@arm.com> 1536759671 +0300

Handle null pointers safely when used as buffers of size 0

When the size of a buffer is 0, the corresponding pointer argument may
be null. In such cases, library functions must not perform arithmetic
on the pointer or call standard library functions such as memset and
memcpy, since that would be undefined behavior in C. Protect such
cases.

Refactor the storage of a 0-sized raw data object to make it store a
null pointer, rather than depending on the behavior of calloc(1,0).