Florian Krohm wrote:
> On Monday 15 December 2008 05:43:20 [email protected] wrote:
>> However it is possible to pack the structs without holes...
>
> Huh?
>
> struct foo {
> int x : 2;
> };
>
> GCC will allocate at least 1 byte of memory for this struct
> independent of -fpack-struct.
Any conforming compiler must allocate at least sizeof(int) bytes.
However, for that specific struct, it is possible for a compiler
to widen all writes to 'x' so that sizeof(int) bytes are written.
This will avoid the hole as far as memcheck is concerned.
Obviously such widening is not possible in the next case:
struct foo {
int x : 2;
int y : 30;
};
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