Mismatch between layout/with-c-layout and clang's reported layout about coffi HOT 3 CLOSED

I'm also getting a mismatch for the following struct:

typedef struct S2 {
    int i;
    void *data[2];
} S2;

int main(int n, char** args){
    printf("size: %lu\n", sizeof(S2));
}

This prints 24, but coffi/size-of reports 20.

(defalias ::S2
  (layout/with-c-layout
   [::mem/struct
    [[:i ::mem/int]
     [:data [:coffi.mem/array [:coffi.mem/pointer :coffi.mem/void] 2]]]]))

(mem/size-of ::S2) ;; 20

from coffi.

Ah, yeah, this was an issue I observed before that I've determined a fix for but it appears I applied it inconsistently. All the value layouts in the JVM-side default to an alignment of 1, which is incorrect, and I corrected this for primitive numbers, but it appears I forgot to do the same for pointers. I believe that the array in your second example should be fixed if I fix the alignment of pointers, but I'll check up on that as well.

from coffi.

This is now fixed on the latest develop. I'll be working on a release soon which will include it.

from coffi.