On 21.08.2025 12:02, Herman ten Brugge wrote:
I debugged this and for stabs and dwarf it is used to register anon structs
(struct with no definition):
Those names used in tccdbg.c are very misleading.
A "struct with no definition" is "incomplete"
struct s;
An "anon(ymous)" struct has no tag (name):
struct { int a; } s;
I created a patch (see attachment) to fix this.
That fixes some problems but not all:
1) forward decl
typedef struct x1 { struct x2 *a; } x1;
struct x2 { struct x1 *b; };
void f(x1 *a) { }
objdump -g ...
struct x1 { /* size 4 id 1 */
<undefined> *a; /* bitsize 32, bitpos 0 */
};
2) same structs are output way too many times. You can see that with
https://github.com/thradams/cake
$ tcc -gdwarf -c object.c -> writes everything 10 x times (~ +400kB)
$ tcc -gstabs -c object.c -> writes everything 84 x times (~ +2500kB)
Well, if some forward decls don't work that's maybe not too dramatic.
Maybe problem 2) can be fixed easily, don't know.
Cheers,
-- gr
Herman
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