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Use FLEXIBLE_ARRAY_MEMBER in a bunch more places.

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Replace some bogus "x[1]" declarations with "x[FLEXIBLE_ARRAY_MEMBER]".
Aside from being more self-documenting, this should help prevent bogus
warnings from static code analyzers and perhaps compiler misoptimizations.

This patch is just a down payment on eliminating the whole problem, but
it gets rid of a lot of easy-to-fix cases.

Note that the main problem with doing this is that one must no longer rely
on computing sizeof(the containing struct), since the result would be
compiler-dependent.  Instead use offsetof(struct, lastfield).  Autoconf
also warns against spelling that offsetof(struct, lastfield[0]).

Michael Paquier, review and additional fixes by me.
This commit is contained in:
Tom Lane
2015-02-20 00:11:42 -05:00
parent 2fb7a75f37
commit 09d8d110a6
44 changed files with 109 additions and 127 deletions
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2
src/include/storage/fsm_internals.h
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@@ -39,7 +39,7 @@ typedef struct
* NonLeafNodesPerPage elements are upper nodes, and the following
* LeafNodesPerPage elements are leaf nodes. Unused nodes are zero.
*/
uint8 fp_nodes[1];
uint8 fp_nodes[FLEXIBLE_ARRAY_MEMBER];
} FSMPageData;
typedef FSMPageData *FSMPage;