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are statically allocated structs always aligned to a machine word on x86/x86_64?
- From: john smith <wempwer at gmail dot com>
- To: libc-help at sourceware dot org
- Date: Fri, 21 Aug 2015 17:54:40 +0200
- Subject: are statically allocated structs always aligned to a machine word on x86/x86_64?
- Authentication-results: sourceware.org; auth=none
I didn't find any information about alignment requirements for
statically allocated objects in glibc manual (or I have missed because
the manual is huge). I noted that sometimes variables such as int are
not aligned on word boundary in x86 and x86_64 but I have never seen a
struct that wouldn't be allocated at address that isn't a multiple or
4/8. I am asking this question because I would like to know whether
it's safe to assume that struct will be always assigned at a word
boundary and therefore it's possible to correctly calculate a struct
size without running a program.
--
<wempwer@gmail.com>