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tccgen: fix crash with undeclared struct

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... as in:
    #include<stdio.h>
    int main()
    {
        struct asdasd x;
        printf("%d\n", sizeof(x));
    }
This fixes commit 17571298f3
This commit is contained in:
grischka 2013-07-24 17:06:13 +02:00
parent 8c033a1461
commit 69c2e7f96c
1 changed files with 8 additions and 6 deletions
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8
tccgen.c
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@ -2764,6 +2764,7 @@ static void struct_decl(CType *type, int u)
v = anon_sym++; v = anon_sym++;
} }
type1.t = a; type1.t = a;
type1.ref = NULL;
/* we put an undefined size for struct/union */ /* we put an undefined size for struct/union */
s = sym_push(v | SYM_STRUCT, &type1, 0, -1); s = sym_push(v | SYM_STRUCT, &type1, 0, -1);
s->r = 0; /* default alignment is zero as gcc */ s->r = 0; /* default alignment is zero as gcc */
@ -5337,13 +5338,14 @@ static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
flexible_array = NULL; flexible_array = NULL;
if ((type->t & VT_BTYPE) == VT_STRUCT) { if ((type->t & VT_BTYPE) == VT_STRUCT) {
Sym *field; Sym *field = type->ref->next;
field = type->ref; if (field) {
while (field && field->next) while (field->next)
field = field->next; field = field->next;
if (field->type.t & VT_ARRAY && field->type.ref->c < 0) if (field->type.t & VT_ARRAY && field->type.ref->c < 0)
flexible_array = field; flexible_array = field;
} }
}
size = type_size(type, &align); size = type_size(type, &align);
/* If unknown size, we must evaluate it before /* If unknown size, we must evaluate it before