Hi,
I’m toying around with a new sparse-based program, trying to check for certain things in C structs definitions.
I’ve looked around at examples and ctags was the most useful as it’s using ‘file_scope’ as the symbol entry point instead of the sparse() return value, which allowed me to see the AST of the types.
After some trial and error, I've figured that I had to call examine_symbol_type() on each symbol before I dive into them to fully compute the bit_size & offset of all the struct members.
While doing that, I've noticed that I cannot tell an empty structure from an incompletely defined one.
I'd like to err out instead of silently using a size=0 struct when I see an undefined type.
struct empty {};
struct foo {
int a;
struct unknown b;
};
The symbol for 'struct empty' and the member 'b' both have a sym->size == 0, an empty sym->symbol_list and a sym->ctype.base_type == NULL.
How can you tell those 2 cases apart?
Thanks
