================
@@ -0,0 +1,187 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+#define __counted_by(f) __attribute__((counted_by(f)))
+
+struct bar;
+
+struct not_found {
+ int count;
+ struct bar *fam[] __counted_by(bork); // expected-error {{use of undeclared
identifier 'bork'}}
+};
+
+struct no_found_count_not_in_substruct {
+ unsigned long flags;
+ unsigned char count; // expected-note {{'count' declared here}}
+ struct A {
+ int dummy;
+ int array[] __counted_by(count); // expected-error {{'counted_by' field
'count' isn't within the same struct as the flexible array}}
+ } a;
+};
+
+struct not_found_count_not_in_unnamed_substruct {
+ unsigned char count; // expected-note {{'count' declared here}}
+ struct {
+ int dummy;
+ int array[] __counted_by(count); // expected-error {{'counted_by' field
'count' isn't within the same struct as the flexible array}}
+ } a;
+};
+
+struct not_found_count_not_in_unnamed_substruct_2 {
+ struct {
+ unsigned char count; // expected-note {{'count' declared here}}
+ };
+ struct {
+ int dummy;
+ int array[] __counted_by(count); // expected-error {{'counted_by' field
'count' isn't within the same struct as the flexible array}}
+ } a;
+};
+
+struct not_found_count_in_other_unnamed_substruct {
+ struct {
+ unsigned char count;
+ } a1;
+
+ struct {
+ int dummy;
+ int array[] __counted_by(count); // expected-error {{use of undeclared
identifier 'count'}}
+ };
+};
+
+struct not_found_count_in_other_substruct {
+ struct _a1 {
+ unsigned char count;
+ } a1;
+
+ struct {
+ int dummy;
+ int array[] __counted_by(count); // expected-error {{use of undeclared
identifier 'count'}}
+ };
+};
+
+struct not_found_count_in_other_substruct_2 {
+ struct _a2 {
+ unsigned char count;
+ } a2;
+
+ int array[] __counted_by(count); // expected-error {{use of undeclared
identifier 'count'}}
+};
+
+struct not_found_suggest {
+ int bork;
+ struct bar *fam[] __counted_by(blork); // expected-error {{use of undeclared
identifier 'blork'}}
+};
+
+int global; // expected-note {{'global' declared here}}
+
+struct found_outside_of_struct {
+ int bork;
+ struct bar *fam[] __counted_by(global); // expected-error {{field 'global'
in 'counted_by' not inside structure}}
+};
+
+struct self_referrential {
+ int bork;
+ struct bar *self[] __counted_by(self); // expected-error {{use of undeclared
identifier 'self'}}
+};
+
+struct non_int_count {
+ double dbl_count;
+ struct bar *fam[] __counted_by(dbl_count); // expected-error {{'counted_by'
requires a non-boolean integer type argument}}
+};
+
+struct array_of_ints_count {
+ int integers[2];
+ struct bar *fam[] __counted_by(integers); // expected-error {{'counted_by'
requires a non-boolean integer type argument}}
+};
+
+struct not_a_fam {
+ int count;
+ // expected-error@+1{{'counted_by' cannot be applied to a pointer with
pointee of unknown size because 'struct bar' is an incomplete type}}
+ struct bar *non_fam __counted_by(count);
+};
+
+struct not_a_c99_fam {
+ int count;
+ struct bar *non_c99_fam[0] __counted_by(count); // expected-error
{{'counted_by' on arrays only applies to C99 flexible array members}}
+};
+
+struct annotated_with_anon_struct {
+ unsigned long flags;
+ struct {
+ unsigned char count;
+ int array[] __counted_by(crount); // expected-error {{use of undeclared
identifier 'crount'}}
+ };
+};
+
+//==============================================================================
+// __counted_by on a struct VLA with element type that has unknown size
+//==============================================================================
+
+struct size_unknown; // expected-note 2{{forward declaration of 'struct
size_unknown'}}
+struct on_member_arr_incomplete_ty_ty_pos {
+ int count;
+ // expected-error@+2{{'counted_by' only applies to pointers or C99 flexible
array members}}
+ // expected-error@+1{{array has incomplete element type 'struct
size_unknown'}}
+ struct size_unknown buf[] __counted_by(count);
+};
+
+struct on_member_arr_incomplete_const_ty_ty_pos {
+ int count;
+ // expected-error@+2{{'counted_by' only applies to pointers or C99 flexible
array members}}
+ // expected-error@+1{{array has incomplete element type 'const struct
size_unknown'}}
+ const struct size_unknown buf[] __counted_by(count);
+};
+
+struct on_member_arr_void_ty_ty_pos {
+ int count;
+ // expected-error@+2{{'counted_by' only applies to pointers or C99 flexible
array members}}
+ // expected-error@+1{{array has incomplete element type 'void'}}
+ void buf[] __counted_by(count);
+};
+
+typedef void(fn_ty)(int);
+
+struct on_member_arr_fn_ty {
+ int count;
+ // expected-error@+2{{'counted_by' only applies to pointers or C99 flexible
array members}}
+ // expected-error@+1{{'buf' declared as array of functions of type 'fn_ty'
(aka 'void (int)')}}
+ fn_ty buf[] __counted_by(count);
+};
----------------
delcypher wrote:
@kees Good catch. Fixed
https://github.com/llvm/llvm-project/pull/90786
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