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Fix crash on invalid code

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like on 'enum myenum { L = -1 } L;'.  It's a bit tedious as
there are two paths (for global vs local symbols), and because
the scope and enum_val share same storage.
This commit is contained in:
Michael Matz 2019-03-08 17:58:25 +01:00
parent b082659f19
commit ef0397cf3d
3 changed files with 22 additions and 2 deletions
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12
tccgen.c
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@ -571,6 +571,14 @@ ST_INLN Sym *sym_find(int v)
return table_ident[v]->sym_identifier;
}
static int sym_scope(Sym *s)
{
if (IS_ENUM_VAL (s->type.t))
return s->type.ref->sym_scope;
else
return s->sym_scope;
}
/* push a given symbol on the symbol stack */
ST_FUNC Sym *sym_push(int v, CType *type, int r, int c)
{
@ -596,7 +604,7 @@ ST_FUNC Sym *sym_push(int v, CType *type, int r, int c)
s->prev_tok = *ps;
*ps = s;
s->sym_scope = local_scope;
if (s->prev_tok && s->prev_tok->sym_scope == s->sym_scope)
if (s->prev_tok && sym_scope(s->prev_tok) == s->sym_scope)
tcc_error("redeclaration of '%s'",
get_tok_str(v & ~SYM_STRUCT, NULL));
}
@ -919,7 +927,7 @@ static void merge_attr(AttributeDef *ad, AttributeDef *ad1)
/* Merge some type attributes. */
static void patch_type(Sym *sym, CType *type)
{
if (!(type->t & VT_EXTERN)) {
if (!(type->t & VT_EXTERN) || IS_ENUM_VAL(sym->type.t)) {
if (!(sym->type.t & VT_EXTERN))
tcc_error("redefinition of '%s'", get_tok_str(sym->v, NULL));
sym->type.t &= ~VT_EXTERN;

6
tests/tests2/60_errors_and_warnings.c
View File

@ -124,4 +124,10 @@ void f() { _Generic((int const *[]){0}, int:0); }
void f() { _Generic((int (*(*)(float,char))(double,int)){0}, int:0); }
#elif defined test_array_to_str
void f() { _Generic((int(*)[3]){0}, int:0); }
#elif defined test_duplicate_def_1
static enum myenum { L = -1 } L;
#elif defined test_duplicate_def_2
void foo(void) {
static enum myenum { L = -1 } L;
}
#endif

6
tests/tests2/60_errors_and_warnings.expect
View File

@ -53,3 +53,9 @@
[test_array_to_str]
60_errors_and_warnings.c:126: error: type 'int (*)[3]' does not match any association
[test_duplicate_def_1]
60_errors_and_warnings.c:128: error: redefinition of 'L'
[test_duplicate_def_2]
60_errors_and_warnings.c:131: error: redeclaration of 'L'