[cfe-dev] Struct padding

[Hongbin Zheng via cfe-dev]

Hi,

I am wondering how I can tell whether a field of a struct is introduced by
padding or not.

For example, if I have a struct:

struct foo1 {
    char *p;     /* 8 bytes */
    char c;      /* 1 byte
    long x;      /* 8 bytes */
};

clang may generate:

struct foo1 {
    char *p;     /* 8 bytes */
    char c;      /* 1 byte
    char pad[7]; /* 7 bytes */
    long x;      /* 8 bytes */
};

Is there any way that I can tell the "pad" array is generated by padding?

Thanks a lot
Hongbin
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