[clang] [Bounds-Safety] Add sized_by, counted_by_or_null & sized_by_or_null (PR #93231)
Henrik G. Olsson via cfe-commits
cfe-commits at lists.llvm.org
Fri May 31 14:42:02 PDT 2024
https://github.com/hnrklssn updated https://github.com/llvm/llvm-project/pull/93231
>From 5c5a28415f2cc10525f07784e6896718cc38624f Mon Sep 17 00:00:00 2001
From: "Henrik G. Olsson" <h_olsson at apple.com>
Date: Thu, 23 May 2024 11:44:41 -0700
Subject: [PATCH] [Bounds-Safety] Add sized_by, counted_by_or_null &
sized_by_or_null
The attributes `sized_by`, `counted_by_or_null` and `sized_by_or_null`
have been added as variants on `counted_by`, each with slightly
different semantics. `sized_by` takes a byte size parameter instead of
an element count, allowing pointees with unknown size. The
`counted_by_or_null` and `sized_by_or_null` variants are equivalent to
their base variants, except the pointer can be null regardless of
count/size value. If the pointer is null the size is effectively 0.
rdar://125400354
---
clang/docs/ReleaseNotes.rst | 6 +
clang/include/clang/Basic/Attr.td | 30 +++
.../clang/Basic/DiagnosticSemaKinds.td | 16 +-
clang/include/clang/Sema/Sema.h | 4 +-
clang/lib/AST/TypePrinter.cpp | 3 +
clang/lib/Parse/ParseDecl.cpp | 7 +-
clang/lib/Sema/SemaDeclAttr.cpp | 70 +++--
clang/lib/Sema/SemaType.cpp | 8 +-
clang/lib/Sema/TreeTransform.h | 3 +-
...unted-by-or-null-late-parsed-struct-ptrs.c | 45 ++++
.../AST/attr-counted-by-or-null-struct-ptrs.c | 117 ++++++++
.../attr-sized-by-late-parsed-struct-ptrs.c | 45 ++++
...sized-by-or-null-late-parsed-struct-ptrs.c | 45 ++++
.../AST/attr-sized-by-or-null-struct-ptrs.c | 117 ++++++++
clang/test/AST/attr-sized-by-struct-ptrs.c | 117 ++++++++
.../attr-counted-by-or-null-late-parsed-off.c | 26 ++
...unted-by-or-null-late-parsed-struct-ptrs.c | 255 ++++++++++++++++++
...ed-by-or-null-struct-ptrs-sizeless-types.c | 17 ++
.../attr-counted-by-or-null-struct-ptrs.c | 225 ++++++++++++++++
...tr-counted-by-or-null-vla-sizeless-types.c | 11 +
.../test/Sema/attr-sized-by-late-parsed-off.c | 26 ++
.../attr-sized-by-late-parsed-struct-ptrs.c | 243 +++++++++++++++++
.../attr-sized-by-or-null-late-parsed-off.c | 26 ++
...sized-by-or-null-late-parsed-struct-ptrs.c | 243 +++++++++++++++++
...ed-by-or-null-struct-ptrs-sizeless-types.c | 16 ++
.../Sema/attr-sized-by-or-null-struct-ptrs.c | 211 +++++++++++++++
...attr-sized-by-or-null-vla-sizeless-types.c | 11 +
...attr-sized-by-struct-ptrs-sizeless-types.c | 16 ++
clang/test/Sema/attr-sized-by-struct-ptrs.c | 211 +++++++++++++++
.../Sema/attr-sized-by-vla-sizeless-types.c | 11 +
30 files changed, 2150 insertions(+), 31 deletions(-)
create mode 100644 clang/test/AST/attr-counted-by-or-null-late-parsed-struct-ptrs.c
create mode 100644 clang/test/AST/attr-counted-by-or-null-struct-ptrs.c
create mode 100644 clang/test/AST/attr-sized-by-late-parsed-struct-ptrs.c
create mode 100644 clang/test/AST/attr-sized-by-or-null-late-parsed-struct-ptrs.c
create mode 100644 clang/test/AST/attr-sized-by-or-null-struct-ptrs.c
create mode 100644 clang/test/AST/attr-sized-by-struct-ptrs.c
create mode 100644 clang/test/Sema/attr-counted-by-or-null-late-parsed-off.c
create mode 100644 clang/test/Sema/attr-counted-by-or-null-late-parsed-struct-ptrs.c
create mode 100644 clang/test/Sema/attr-counted-by-or-null-struct-ptrs-sizeless-types.c
create mode 100644 clang/test/Sema/attr-counted-by-or-null-struct-ptrs.c
create mode 100644 clang/test/Sema/attr-counted-by-or-null-vla-sizeless-types.c
create mode 100644 clang/test/Sema/attr-sized-by-late-parsed-off.c
create mode 100644 clang/test/Sema/attr-sized-by-late-parsed-struct-ptrs.c
create mode 100644 clang/test/Sema/attr-sized-by-or-null-late-parsed-off.c
create mode 100644 clang/test/Sema/attr-sized-by-or-null-late-parsed-struct-ptrs.c
create mode 100644 clang/test/Sema/attr-sized-by-or-null-struct-ptrs-sizeless-types.c
create mode 100644 clang/test/Sema/attr-sized-by-or-null-struct-ptrs.c
create mode 100644 clang/test/Sema/attr-sized-by-or-null-vla-sizeless-types.c
create mode 100644 clang/test/Sema/attr-sized-by-struct-ptrs-sizeless-types.c
create mode 100644 clang/test/Sema/attr-sized-by-struct-ptrs.c
create mode 100644 clang/test/Sema/attr-sized-by-vla-sizeless-types.c
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 22b4dc172c840..d1e414c99029b 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -451,6 +451,12 @@ Attribute Changes in Clang
size_t count;
};
+- The attributes ``sized_by``, ``counted_by_or_null`` and ``sized_by_or_null```
+ have been added as variants on ``counted_by``, each with slightly different semantics.
+ ``sized_by`` takes a byte size parameter instead of an element count, allowing pointees
+ with unknown size. The ``counted_by_or_null`` and ``sized_by_or_null`` variants are equivalent
+ to their base variants, except the pointer can be null regardless of count/size value.
+ If the pointer is null the size is effectively 0.
Improvements to Clang's diagnostics
-----------------------------------
diff --git a/clang/include/clang/Basic/Attr.td b/clang/include/clang/Basic/Attr.td
index 2665b7353ca4a..80a3dc045fbb7 100644
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -2265,6 +2265,36 @@ def CountedBy : DeclOrTypeAttr {
let LangOpts = [COnly];
}
+def CountedByOrNull : DeclOrTypeAttr {
+ let Spellings = [Clang<"counted_by_or_null">];
+ let Subjects = SubjectList<[Field], ErrorDiag>;
+ let Args = [ExprArgument<"Count">, IntArgument<"NestedLevel", 1>];
+ let LateParsed = LateAttrParseExperimentalExt;
+ let ParseArgumentsAsUnevaluated = 1;
+ let Documentation = [CountedByDocs];
+ let LangOpts = [COnly];
+}
+
+def SizedBy : DeclOrTypeAttr {
+ let Spellings = [Clang<"sized_by">];
+ let Subjects = SubjectList<[Field], ErrorDiag>;
+ let Args = [ExprArgument<"Size">, IntArgument<"NestedLevel", 1>];
+ let LateParsed = LateAttrParseExperimentalExt;
+ let ParseArgumentsAsUnevaluated = 1;
+ let Documentation = [CountedByDocs];
+ let LangOpts = [COnly];
+}
+
+def SizedByOrNull : DeclOrTypeAttr {
+ let Spellings = [Clang<"sized_by_or_null">];
+ let Subjects = SubjectList<[Field], ErrorDiag>;
+ let Args = [ExprArgument<"Size">, IntArgument<"NestedLevel", 1>];
+ let LateParsed = LateAttrParseExperimentalExt;
+ let ParseArgumentsAsUnevaluated = 1;
+ let Documentation = [CountedByDocs];
+ let LangOpts = [COnly];
+}
+
// This is a marker used to indicate that an __unsafe_unretained qualifier was
// ignored because ARC is not enabled. The usual representation for this
// qualifier is as an ObjCOwnership attribute with Kind == "none".
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index e34eb692941b4..a221dd6cda6a6 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -6543,27 +6543,27 @@ def warn_superclass_variable_sized_type_not_at_end : Warning<
" in superclass %3">, InGroup<ObjCFlexibleArray>;
def err_flexible_array_count_not_in_same_struct : Error<
- "'counted_by' field %0 isn't within the same struct as the flexible array">;
+ "'%select{counted_by|sized_by|counted_by_or_null|sized_by_or_null}1' field %0 isn't within the same struct as the flexible array">;
def err_counted_by_attr_not_on_ptr_or_flexible_array_member : Error<
- "'counted_by' only applies to pointers or C99 flexible array members">;
+ "'%select{counted_by|sized_by|counted_by_or_null|sized_by_or_null}0' only applies to pointers%select{ or C99 flexible array members|||}0">;
def err_counted_by_attr_on_array_not_flexible_array_member : Error<
"'counted_by' on arrays only applies to C99 flexible array members">;
def err_counted_by_attr_refer_to_itself : Error<
"'counted_by' cannot refer to the flexible array member %0">;
def err_counted_by_must_be_in_structure : Error<
- "field %0 in 'counted_by' not inside structure">;
+ "field %0 in '%select{counted_by|sized_by|counted_by_or_null|sized_by_or_null}1' not inside structure">;
def err_counted_by_attr_argument_not_integer : Error<
- "'counted_by' requires a non-boolean integer type argument">;
+ "'%select{counted_by|sized_by|counted_by_or_null|sized_by_or_null}0' requires a non-boolean integer type argument">;
def err_counted_by_attr_only_support_simple_decl_reference : Error<
- "'counted_by' argument must be a simple declaration reference">;
+ "'%select{counted_by|sized_by|counted_by_or_null|sized_by_or_null}0' argument must be a simple declaration reference">;
def err_counted_by_attr_in_union : Error<
- "'counted_by' cannot be applied to a union member">;
+ "'%select{counted_by|sized_by|counted_by_or_null|sized_by_or_null}0' cannot be applied to a union member">;
def err_counted_by_attr_refer_to_union : Error<
- "'counted_by' argument cannot refer to a union member">;
+ "'%select{counted_by|sized_by|counted_by_or_null|sized_by_or_null}0' argument cannot refer to a union member">;
def note_flexible_array_counted_by_attr_field : Note<
"field %0 declared here">;
def err_counted_by_attr_pointee_unknown_size : Error<
- "'counted_by' %select{cannot|should not}3 be applied to %select{"
+ "'%select{counted_by|counted_by_or_null}4' %select{cannot|should not}3 be applied to %select{"
"a pointer with pointee|" // pointer
"an array with element}0" // array
" of unknown size because %1 is %select{"
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 7dea2b6826cfd..c472432510901 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -11432,7 +11432,9 @@ class Sema final : public SemaBase {
SourceLocation AttrLoc);
QualType BuildCountAttributedArrayOrPointerType(QualType WrappedTy,
- Expr *CountExpr);
+ Expr *CountExpr,
+ bool CountInBytes,
+ bool OrNull);
QualType BuildAddressSpaceAttr(QualType &T, LangAS ASIdx, Expr *AddrSpace,
SourceLocation AttrLoc);
diff --git a/clang/lib/AST/TypePrinter.cpp b/clang/lib/AST/TypePrinter.cpp
index 58d01705d607b..a6d3cf2e4bec8 100644
--- a/clang/lib/AST/TypePrinter.cpp
+++ b/clang/lib/AST/TypePrinter.cpp
@@ -1905,6 +1905,9 @@ void TypePrinter::printAttributedAfter(const AttributedType *T,
break;
case attr::CountedBy:
+ case attr::CountedByOrNull:
+ case attr::SizedBy:
+ case attr::SizedByOrNull:
case attr::LifetimeBound:
case attr::TypeNonNull:
case attr::TypeNullable:
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index c528917437332..5edd85a385113 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -667,7 +667,10 @@ void Parser::ParseGNUAttributeArgs(
ParseAttributeWithTypeArg(*AttrName, AttrNameLoc, Attrs, ScopeName,
ScopeLoc, Form);
return;
- } else if (AttrKind == ParsedAttr::AT_CountedBy) {
+ } else if (AttrKind == ParsedAttr::AT_CountedBy ||
+ AttrKind == ParsedAttr::AT_CountedByOrNull ||
+ AttrKind == ParsedAttr::AT_SizedBy ||
+ AttrKind == ParsedAttr::AT_SizedByOrNull) {
ParseBoundsAttribute(*AttrName, AttrNameLoc, Attrs, ScopeName, ScopeLoc,
Form);
return;
@@ -4835,7 +4838,7 @@ static void DiagnoseCountAttributedTypeInUnnamedAnon(ParsingDeclSpec &DS,
if (!RD->containsDecl(DD.getDecl())) {
P.Diag(VD->getBeginLoc(),
diag::err_flexible_array_count_not_in_same_struct)
- << DD.getDecl();
+ << DD.getDecl() << CAT->getKind();
P.Diag(DD.getDecl()->getBeginLoc(),
diag::note_flexible_array_counted_by_attr_field)
<< DD.getDecl();
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 7c1fb23b90728..7e56a23e2c897 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -8328,22 +8328,33 @@ enum class CountedByInvalidPointeeTypeKind {
VALID,
};
-static bool CheckCountedByAttrOnField(
- Sema &S, FieldDecl *FD, Expr *E,
- llvm::SmallVectorImpl<TypeCoupledDeclRefInfo> &Decls) {
+static bool
+CheckCountedByAttrOnField(Sema &S, FieldDecl *FD, Expr *E,
+ llvm::SmallVectorImpl<TypeCoupledDeclRefInfo> &Decls,
+ bool CountInBytes, bool OrNull) {
// Check the context the attribute is used in
+ unsigned Kind = CountInBytes;
+ if (OrNull)
+ Kind += 2;
+
if (FD->getParent()->isUnion()) {
S.Diag(FD->getBeginLoc(), diag::err_counted_by_attr_in_union)
- << FD->getSourceRange();
+ << Kind << FD->getSourceRange();
return true;
}
const auto FieldTy = FD->getType();
+ if (FieldTy->isArrayType() && (CountInBytes || OrNull)) {
+ S.Diag(FD->getBeginLoc(),
+ diag::err_counted_by_attr_not_on_ptr_or_flexible_array_member)
+ << Kind << FD->getLocation();
+ return true;
+ }
if (!FieldTy->isArrayType() && !FieldTy->isPointerType()) {
S.Diag(FD->getBeginLoc(),
diag::err_counted_by_attr_not_on_ptr_or_flexible_array_member)
- << FD->getLocation();
+ << Kind << FD->getLocation();
return true;
}
@@ -8354,7 +8365,7 @@ static bool CheckCountedByAttrOnField(
StrictFlexArraysLevel, true)) {
S.Diag(FD->getBeginLoc(),
diag::err_counted_by_attr_on_array_not_flexible_array_member)
- << FD->getLocation();
+ << Kind << FD->getLocation();
return true;
}
@@ -8394,13 +8405,14 @@ static bool CheckCountedByAttrOnField(
InvalidTypeKind = CountedByInvalidPointeeTypeKind::FLEXIBLE_ARRAY_MEMBER;
}
- if (InvalidTypeKind != CountedByInvalidPointeeTypeKind::VALID) {
+ if (InvalidTypeKind != CountedByInvalidPointeeTypeKind::VALID &&
+ !CountInBytes) {
unsigned DiagID = ShouldWarn
? diag::warn_counted_by_attr_elt_type_unknown_size
: diag::err_counted_by_attr_pointee_unknown_size;
S.Diag(FD->getBeginLoc(), DiagID)
<< SelectPtrOrArr << PointeeTy << (int)InvalidTypeKind
- << (ShouldWarn ? 1 : 0) << FD->getSourceRange();
+ << (ShouldWarn ? 1 : 0) << OrNull << FD->getSourceRange();
return true;
}
@@ -8408,7 +8420,7 @@ static bool CheckCountedByAttrOnField(
if (!E->getType()->isIntegerType() || E->getType()->isBooleanType()) {
S.Diag(E->getBeginLoc(), diag::err_counted_by_attr_argument_not_integer)
- << E->getSourceRange();
+ << Kind << E->getSourceRange();
return true;
}
@@ -8416,7 +8428,7 @@ static bool CheckCountedByAttrOnField(
if (!DRE) {
S.Diag(E->getBeginLoc(),
diag::err_counted_by_attr_only_support_simple_decl_reference)
- << E->getSourceRange();
+ << Kind << E->getSourceRange();
return true;
}
@@ -8427,7 +8439,7 @@ static bool CheckCountedByAttrOnField(
}
if (!CountFD) {
S.Diag(E->getBeginLoc(), diag::err_counted_by_must_be_in_structure)
- << CountDecl << E->getSourceRange();
+ << CountDecl << Kind << E->getSourceRange();
S.Diag(CountDecl->getBeginLoc(),
diag::note_flexible_array_counted_by_attr_field)
@@ -8438,7 +8450,7 @@ static bool CheckCountedByAttrOnField(
if (FD->getParent() != CountFD->getParent()) {
if (CountFD->getParent()->isUnion()) {
S.Diag(CountFD->getBeginLoc(), diag::err_counted_by_attr_refer_to_union)
- << CountFD->getSourceRange();
+ << Kind << CountFD->getSourceRange();
return true;
}
// Whether CountRD is an anonymous struct is not determined at this
@@ -8450,7 +8462,7 @@ static bool CheckCountedByAttrOnField(
if (RD != CountRD) {
S.Diag(E->getBeginLoc(),
diag::err_flexible_array_count_not_in_same_struct)
- << CountFD << E->getSourceRange();
+ << CountFD << Kind << E->getSourceRange();
S.Diag(CountFD->getBeginLoc(),
diag::note_flexible_array_counted_by_attr_field)
<< CountFD << CountFD->getSourceRange();
@@ -8470,12 +8482,35 @@ static void handleCountedByAttrField(Sema &S, Decl *D, const ParsedAttr &AL) {
if (!CountExpr)
return;
+ bool CountInBytes;
+ bool OrNull;
+ switch (AL.getKind()) {
+ case ParsedAttr::AT_CountedBy:
+ CountInBytes = false;
+ OrNull = false;
+ break;
+ case ParsedAttr::AT_CountedByOrNull:
+ CountInBytes = false;
+ OrNull = true;
+ break;
+ case ParsedAttr::AT_SizedBy:
+ CountInBytes = true;
+ OrNull = false;
+ break;
+ case ParsedAttr::AT_SizedByOrNull:
+ CountInBytes = true;
+ OrNull = true;
+ break;
+ default:
+ llvm_unreachable("unexpected counted_by family attribute");
+ }
+
llvm::SmallVector<TypeCoupledDeclRefInfo, 1> Decls;
- if (CheckCountedByAttrOnField(S, FD, CountExpr, Decls))
+ if (CheckCountedByAttrOnField(S, FD, CountExpr, Decls, CountInBytes, OrNull))
return;
- QualType CAT =
- S.BuildCountAttributedArrayOrPointerType(FD->getType(), CountExpr);
+ QualType CAT = S.BuildCountAttributedArrayOrPointerType(
+ FD->getType(), CountExpr, CountInBytes, OrNull);
FD->setType(CAT);
}
@@ -9502,6 +9537,9 @@ ProcessDeclAttribute(Sema &S, Scope *scope, Decl *D, const ParsedAttr &AL,
break;
case ParsedAttr::AT_CountedBy:
+ case ParsedAttr::AT_CountedByOrNull:
+ case ParsedAttr::AT_SizedBy:
+ case ParsedAttr::AT_SizedByOrNull:
handleCountedByAttrField(S, D, AL);
break;
diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
index 7cec82c701028..7ef3b1ca34e63 100644
--- a/clang/lib/Sema/SemaType.cpp
+++ b/clang/lib/Sema/SemaType.cpp
@@ -9350,15 +9350,17 @@ BuildTypeCoupledDecls(Expr *E,
}
QualType Sema::BuildCountAttributedArrayOrPointerType(QualType WrappedTy,
- Expr *CountExpr) {
+ Expr *CountExpr,
+ bool CountInBytes,
+ bool OrNull) {
assert(WrappedTy->isIncompleteArrayType() || WrappedTy->isPointerType());
llvm::SmallVector<TypeCoupledDeclRefInfo, 1> Decls;
BuildTypeCoupledDecls(CountExpr, Decls);
/// When the resulting expression is invalid, we still create the AST using
/// the original count expression for the sake of AST dump.
- return Context.getCountAttributedType(
- WrappedTy, CountExpr, /*CountInBytes*/ false, /*OrNull*/ false, Decls);
+ return Context.getCountAttributedType(WrappedTy, CountExpr, CountInBytes,
+ OrNull, Decls);
}
/// getDecltypeForExpr - Given an expr, will return the decltype for
diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index efba99b85b0fb..18acb7e72c128 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -7336,7 +7336,8 @@ QualType TreeTransform<Derived>::TransformCountAttributedType(
if (getDerived().AlwaysRebuild() || InnerTy != OldTy->desugar() ||
OldCount != NewCount) {
// Currently, CountAttributedType can only wrap incomplete array types.
- Result = SemaRef.BuildCountAttributedArrayOrPointerType(InnerTy, NewCount);
+ Result = SemaRef.BuildCountAttributedArrayOrPointerType(
+ InnerTy, NewCount, OldTy->isCountInBytes(), OldTy->isOrNull());
}
TLB.push<CountAttributedTypeLoc>(Result);
diff --git a/clang/test/AST/attr-counted-by-or-null-late-parsed-struct-ptrs.c b/clang/test/AST/attr-counted-by-or-null-late-parsed-struct-ptrs.c
new file mode 100644
index 0000000000000..975c0a0231943
--- /dev/null
+++ b/clang/test/AST/attr-counted-by-or-null-late-parsed-struct-ptrs.c
@@ -0,0 +1,45 @@
+// RUN: %clang_cc1 -fexperimental-late-parse-attributes %s -ast-dump | FileCheck %s
+
+#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f)))
+
+struct size_known {
+ int field;
+};
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ struct size_known *buf __counted_by_or_null(count);
+ int count;
+};
+// CHECK-LABEL: struct on_member_pointer_complete_ty definition
+// CHECK-NEXT: |-FieldDecl {{.*}} buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: `-FieldDecl {{.*}} referenced count 'int'
+
+struct on_pointer_anon_count {
+ struct size_known *buf __counted_by_or_null(count);
+ struct {
+ int count;
+ };
+};
+
+// CHECK-LABEL: struct on_pointer_anon_count definition
+// CHECK-NEXT: |-FieldDecl {{.*}} buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-RecordDecl {{.*}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.*}} count 'int'
+// CHECK-NEXT: |-FieldDecl {{.*}} implicit 'struct on_pointer_anon_count::(anonymous at {{.*}})'
+// CHECK-NEXT: `-IndirectFieldDecl {{.*}} implicit referenced count 'int'
+// CHECK-NEXT: |-Field {{.*}} '' 'struct on_pointer_anon_count::(anonymous at {{.*}})'
+// CHECK-NEXT: `-Field {{.*}} 'count' 'int'
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse counted_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute and is **not** late parsed resulting in the `count`
+// field being unavailable.
+//
+// See `clang/test/Sema/attr-counted-by-late-parsed-struct-ptrs.c` for test
+// cases.
diff --git a/clang/test/AST/attr-counted-by-or-null-struct-ptrs.c b/clang/test/AST/attr-counted-by-or-null-struct-ptrs.c
new file mode 100644
index 0000000000000..cedb3f1192eda
--- /dev/null
+++ b/clang/test/AST/attr-counted-by-or-null-struct-ptrs.c
@@ -0,0 +1,117 @@
+// RUN: %clang_cc1 %s -ast-dump | FileCheck %s
+
+#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_complete_ty definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+struct on_member_pointer_complete_ty {
+ int count;
+ struct size_known * buf __counted_by_or_null(count);
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_buf definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_buf::(anonymous at [[ANON_STRUCT_PATH:.+]])'
+// CHECK-NEXT: `-IndirectFieldDecl {{.+}} implicit buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-Field {{.+}} '' 'struct on_pointer_anon_buf::(anonymous at [[ANON_STRUCT_PATH]])'
+// CHECK-NEXT: `-Field {{.+}} 'buf' 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+struct on_pointer_anon_buf {
+ int count;
+ struct {
+ struct size_known *buf __counted_by_or_null(count);
+ };
+};
+
+struct on_pointer_anon_count {
+ struct {
+ int count;
+ };
+ struct size_known *buf __counted_by_or_null(count);
+};
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse counted_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_complete_ty_ty_pos definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+struct on_member_pointer_complete_ty_ty_pos {
+ int count;
+ struct size_known *__counted_by_or_null(count) buf;
+};
+
+// TODO: This should be forbidden but isn't due to counted_by_or_null being treated as a
+// declaration attribute. The attribute ends up on the outer most pointer
+// (allowed by sema) even though syntactically its supposed to be on the inner
+// pointer (would not allowed by sema due to pointee being a function type).
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_fn_ptr_ty_ty_pos_inner definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} fn_ptr 'void (** __counted_by_or_null(count))(void)':'void (**)(void)'
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ int count;
+ void (* __counted_by_or_null(count) * fn_ptr)(void);
+};
+
+// FIXME: The generated AST here is wrong. The attribute should be on the inner
+// pointer.
+// CHECK-LABEL: RecordDecl {{.+}} struct on_nested_pointer_inner definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known ** __counted_by_or_null(count)':'struct size_known **'
+struct on_nested_pointer_inner {
+ int count;
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__counted_by_or_null` can only be nested when used in function parameters.
+ struct size_known *__counted_by_or_null(count) *buf;
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_nested_pointer_outer definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known ** __counted_by_or_null(count)':'struct size_known **'
+struct on_nested_pointer_outer {
+ int count;
+ struct size_known **__counted_by_or_null(count) buf;
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_buf_ty_pos definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_buf_ty_pos::(anonymous at [[ANON_STRUCT_PATH2:.+]])'
+// CHECK-NEXT: `-IndirectFieldDecl {{.+}} implicit buf 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-Field {{.+}} '' 'struct on_pointer_anon_buf_ty_pos::(anonymous at [[ANON_STRUCT_PATH2]])'
+// CHECK-NEXT: `-Field {{.+}} 'buf' 'struct size_known * __counted_by_or_null(count)':'struct size_known *'
+struct on_pointer_anon_buf_ty_pos {
+ int count;
+ struct {
+ struct size_known * __counted_by_or_null(count) buf;
+ };
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_count_ty_pos definition
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} count 'int'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_count_ty_pos::(anonymous at [[ANON_STRUCT_PATH3:.+]])'
+// CHECK-NEXT: |-IndirectFieldDecl {{.+}} implicit referenced count 'int'
+// CHECK-NEXT: | |-Field {{.+}} '' 'struct on_pointer_anon_count_ty_pos::(anonymous at [[ANON_STRUCT_PATH3]])'
+// CHECK-NEXT: | `-Field {{.+}} 'count' 'int'
+struct on_pointer_anon_count_ty_pos {
+ struct {
+ int count;
+ };
+ struct size_known *__counted_by_or_null(count) buf;
+};
diff --git a/clang/test/AST/attr-sized-by-late-parsed-struct-ptrs.c b/clang/test/AST/attr-sized-by-late-parsed-struct-ptrs.c
new file mode 100644
index 0000000000000..b58caf608bf97
--- /dev/null
+++ b/clang/test/AST/attr-sized-by-late-parsed-struct-ptrs.c
@@ -0,0 +1,45 @@
+// RUN: %clang_cc1 -fexperimental-late-parse-attributes %s -ast-dump | FileCheck %s
+
+#define __sized_by(f) __attribute__((sized_by(f)))
+
+struct size_known {
+ int field;
+};
+
+//==============================================================================
+// __sized_by on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ struct size_known *buf __sized_by(count);
+ int count;
+};
+// CHECK-LABEL: struct on_member_pointer_complete_ty definition
+// CHECK-NEXT: |-FieldDecl {{.*}} buf 'struct size_known * __sized_by(count)':'struct size_known *'
+// CHECK-NEXT: `-FieldDecl {{.*}} referenced count 'int'
+
+struct on_pointer_anon_count {
+ struct size_known *buf __sized_by(count);
+ struct {
+ int count;
+ };
+};
+
+// CHECK-LABEL: struct on_pointer_anon_count definition
+// CHECK-NEXT: |-FieldDecl {{.*}} buf 'struct size_known * __sized_by(count)':'struct size_known *'
+// CHECK-NEXT: |-RecordDecl {{.*}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.*}} count 'int'
+// CHECK-NEXT: |-FieldDecl {{.*}} implicit 'struct on_pointer_anon_count::(anonymous at {{.*}})'
+// CHECK-NEXT: `-IndirectFieldDecl {{.*}} implicit referenced count 'int'
+// CHECK-NEXT: |-Field {{.*}} '' 'struct on_pointer_anon_count::(anonymous at {{.*}})'
+// CHECK-NEXT: `-Field {{.*}} 'count' 'int'
+
+//==============================================================================
+// __sized_by on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by as a type attribute. Currently it is parsed
+// as a declaration attribute and is **not** late parsed resulting in the `count`
+// field being unavailable.
+//
+// See `clang/test/Sema/attr-counted-by-late-parsed-struct-ptrs.c` for test
+// cases.
diff --git a/clang/test/AST/attr-sized-by-or-null-late-parsed-struct-ptrs.c b/clang/test/AST/attr-sized-by-or-null-late-parsed-struct-ptrs.c
new file mode 100644
index 0000000000000..d55a42ac0fb94
--- /dev/null
+++ b/clang/test/AST/attr-sized-by-or-null-late-parsed-struct-ptrs.c
@@ -0,0 +1,45 @@
+// RUN: %clang_cc1 -fexperimental-late-parse-attributes %s -ast-dump | FileCheck %s
+
+#define __sized_by_or_null(f) __attribute__((sized_by_or_null(f)))
+
+struct size_known {
+ int field;
+};
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ struct size_known *buf __sized_by_or_null(count);
+ int count;
+};
+// CHECK-LABEL: struct on_member_pointer_complete_ty definition
+// CHECK-NEXT: |-FieldDecl {{.*}} buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: `-FieldDecl {{.*}} referenced count 'int'
+
+struct on_pointer_anon_count {
+ struct size_known *buf __sized_by_or_null(count);
+ struct {
+ int count;
+ };
+};
+
+// CHECK-LABEL: struct on_pointer_anon_count definition
+// CHECK-NEXT: |-FieldDecl {{.*}} buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-RecordDecl {{.*}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.*}} count 'int'
+// CHECK-NEXT: |-FieldDecl {{.*}} implicit 'struct on_pointer_anon_count::(anonymous at {{.*}})'
+// CHECK-NEXT: `-IndirectFieldDecl {{.*}} implicit referenced count 'int'
+// CHECK-NEXT: |-Field {{.*}} '' 'struct on_pointer_anon_count::(anonymous at {{.*}})'
+// CHECK-NEXT: `-Field {{.*}} 'count' 'int'
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute and is **not** late parsed resulting in the `count`
+// field being unavailable.
+//
+// See `clang/test/Sema/attr-counted-by-late-parsed-struct-ptrs.c` for test
+// cases.
diff --git a/clang/test/AST/attr-sized-by-or-null-struct-ptrs.c b/clang/test/AST/attr-sized-by-or-null-struct-ptrs.c
new file mode 100644
index 0000000000000..6189799b85ccb
--- /dev/null
+++ b/clang/test/AST/attr-sized-by-or-null-struct-ptrs.c
@@ -0,0 +1,117 @@
+// RUN: %clang_cc1 %s -ast-dump | FileCheck %s
+
+#define __sized_by_or_null(f) __attribute__((sized_by_or_null(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_complete_ty definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+struct on_member_pointer_complete_ty {
+ int count;
+ struct size_known * buf __sized_by_or_null(count);
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_buf definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_buf::(anonymous at [[ANON_STRUCT_PATH:.+]])'
+// CHECK-NEXT: `-IndirectFieldDecl {{.+}} implicit buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-Field {{.+}} '' 'struct on_pointer_anon_buf::(anonymous at [[ANON_STRUCT_PATH]])'
+// CHECK-NEXT: `-Field {{.+}} 'buf' 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+struct on_pointer_anon_buf {
+ int count;
+ struct {
+ struct size_known *buf __sized_by_or_null(count);
+ };
+};
+
+struct on_pointer_anon_count {
+ struct {
+ int count;
+ };
+ struct size_known *buf __sized_by_or_null(count);
+};
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_complete_ty_ty_pos definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+struct on_member_pointer_complete_ty_ty_pos {
+ int count;
+ struct size_known *__sized_by_or_null(count) buf;
+};
+
+// TODO: This should be forbidden but isn't due to sized_by_or_null being treated as a
+// declaration attribute. The attribute ends up on the outer most pointer
+// (allowed by sema) even though syntactically its supposed to be on the inner
+// pointer (would not allowed by sema due to pointee being a function type).
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_fn_ptr_ty_ty_pos_inner definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} fn_ptr 'void (** __sized_by_or_null(count))(void)':'void (**)(void)'
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ int count;
+ void (* __sized_by_or_null(count) * fn_ptr)(void);
+};
+
+// FIXME: The generated AST here is wrong. The attribute should be on the inner
+// pointer.
+// CHECK-LABEL: RecordDecl {{.+}} struct on_nested_pointer_inner definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known ** __sized_by_or_null(count)':'struct size_known **'
+struct on_nested_pointer_inner {
+ int count;
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__sized_by_or_null` can only be nested when used in function parameters.
+ struct size_known *__sized_by_or_null(count) *buf;
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_nested_pointer_outer definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known ** __sized_by_or_null(count)':'struct size_known **'
+struct on_nested_pointer_outer {
+ int count;
+ struct size_known **__sized_by_or_null(count) buf;
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_buf_ty_pos definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_buf_ty_pos::(anonymous at [[ANON_STRUCT_PATH2:.+]])'
+// CHECK-NEXT: `-IndirectFieldDecl {{.+}} implicit buf 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+// CHECK-NEXT: |-Field {{.+}} '' 'struct on_pointer_anon_buf_ty_pos::(anonymous at [[ANON_STRUCT_PATH2]])'
+// CHECK-NEXT: `-Field {{.+}} 'buf' 'struct size_known * __sized_by_or_null(count)':'struct size_known *'
+struct on_pointer_anon_buf_ty_pos {
+ int count;
+ struct {
+ struct size_known * __sized_by_or_null(count) buf;
+ };
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_count_ty_pos definition
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} count 'int'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_count_ty_pos::(anonymous at [[ANON_STRUCT_PATH3:.+]])'
+// CHECK-NEXT: |-IndirectFieldDecl {{.+}} implicit referenced count 'int'
+// CHECK-NEXT: | |-Field {{.+}} '' 'struct on_pointer_anon_count_ty_pos::(anonymous at [[ANON_STRUCT_PATH3]])'
+// CHECK-NEXT: | `-Field {{.+}} 'count' 'int'
+struct on_pointer_anon_count_ty_pos {
+ struct {
+ int count;
+ };
+ struct size_known *__sized_by_or_null(count) buf;
+};
diff --git a/clang/test/AST/attr-sized-by-struct-ptrs.c b/clang/test/AST/attr-sized-by-struct-ptrs.c
new file mode 100644
index 0000000000000..5d9ed0094c685
--- /dev/null
+++ b/clang/test/AST/attr-sized-by-struct-ptrs.c
@@ -0,0 +1,117 @@
+// RUN: %clang_cc1 %s -ast-dump | FileCheck %s
+
+#define __sized_by(f) __attribute__((sized_by(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+//==============================================================================
+// __sized_by on struct member pointer in decl attribute position
+//==============================================================================
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_complete_ty definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known * __sized_by(count)':'struct size_known *'
+struct on_member_pointer_complete_ty {
+ int count;
+ struct size_known * buf __sized_by(count);
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_buf definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} buf 'struct size_known * __sized_by(count)':'struct size_known *'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_buf::(anonymous at [[ANON_STRUCT_PATH:.+]])'
+// CHECK-NEXT: `-IndirectFieldDecl {{.+}} implicit buf 'struct size_known * __sized_by(count)':'struct size_known *'
+// CHECK-NEXT: |-Field {{.+}} '' 'struct on_pointer_anon_buf::(anonymous at [[ANON_STRUCT_PATH]])'
+// CHECK-NEXT: `-Field {{.+}} 'buf' 'struct size_known * __sized_by(count)':'struct size_known *'
+struct on_pointer_anon_buf {
+ int count;
+ struct {
+ struct size_known *buf __sized_by(count);
+ };
+};
+
+struct on_pointer_anon_count {
+ struct {
+ int count;
+ };
+ struct size_known *buf __sized_by(count);
+};
+
+//==============================================================================
+// __sized_by on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by as a type attribute. Currently it is parsed
+// as a declaration attribute
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_complete_ty_ty_pos definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known * __sized_by(count)':'struct size_known *'
+struct on_member_pointer_complete_ty_ty_pos {
+ int count;
+ struct size_known *__sized_by(count) buf;
+};
+
+// TODO: This should be forbidden but isn't due to sized_by being treated as a
+// declaration attribute. The attribute ends up on the outer most pointer
+// (allowed by sema) even though syntactically its supposed to be on the inner
+// pointer (would not allowed by sema due to pointee being a function type).
+// CHECK-LABEL: RecordDecl {{.+}} struct on_member_pointer_fn_ptr_ty_ty_pos_inner definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} fn_ptr 'void (** __sized_by(count))(void)':'void (**)(void)'
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ int count;
+ void (* __sized_by(count) * fn_ptr)(void);
+};
+
+// FIXME: The generated AST here is wrong. The attribute should be on the inner
+// pointer.
+// CHECK-LABEL: RecordDecl {{.+}} struct on_nested_pointer_inner definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known ** __sized_by(count)':'struct size_known **'
+struct on_nested_pointer_inner {
+ int count;
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__sized_by` can only be nested when used in function parameters.
+ struct size_known *__sized_by(count) *buf;
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_nested_pointer_outer definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: `-FieldDecl {{.+}} buf 'struct size_known ** __sized_by(count)':'struct size_known **'
+struct on_nested_pointer_outer {
+ int count;
+ struct size_known **__sized_by(count) buf;
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_buf_ty_pos definition
+// CHECK-NEXT: |-FieldDecl {{.+}} referenced count 'int'
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} buf 'struct size_known * __sized_by(count)':'struct size_known *'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_buf_ty_pos::(anonymous at [[ANON_STRUCT_PATH2:.+]])'
+// CHECK-NEXT: `-IndirectFieldDecl {{.+}} implicit buf 'struct size_known * __sized_by(count)':'struct size_known *'
+// CHECK-NEXT: |-Field {{.+}} '' 'struct on_pointer_anon_buf_ty_pos::(anonymous at [[ANON_STRUCT_PATH2]])'
+// CHECK-NEXT: `-Field {{.+}} 'buf' 'struct size_known * __sized_by(count)':'struct size_known *'
+struct on_pointer_anon_buf_ty_pos {
+ int count;
+ struct {
+ struct size_known * __sized_by(count) buf;
+ };
+};
+
+// CHECK-LABEL: RecordDecl {{.+}} struct on_pointer_anon_count_ty_pos definition
+// CHECK-NEXT: |-RecordDecl {{.+}} struct definition
+// CHECK-NEXT: | `-FieldDecl {{.+}} count 'int'
+// CHECK-NEXT: |-FieldDecl {{.+}} implicit 'struct on_pointer_anon_count_ty_pos::(anonymous at [[ANON_STRUCT_PATH3:.+]])'
+// CHECK-NEXT: |-IndirectFieldDecl {{.+}} implicit referenced count 'int'
+// CHECK-NEXT: | |-Field {{.+}} '' 'struct on_pointer_anon_count_ty_pos::(anonymous at [[ANON_STRUCT_PATH3]])'
+// CHECK-NEXT: | `-Field {{.+}} 'count' 'int'
+struct on_pointer_anon_count_ty_pos {
+ struct {
+ int count;
+ };
+ struct size_known *__sized_by(count) buf;
+};
diff --git a/clang/test/Sema/attr-counted-by-or-null-late-parsed-off.c b/clang/test/Sema/attr-counted-by-or-null-late-parsed-off.c
new file mode 100644
index 0000000000000..0e76ad9e48b4e
--- /dev/null
+++ b/clang/test/Sema/attr-counted-by-or-null-late-parsed-off.c
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -DNEEDS_LATE_PARSING -fno-experimental-late-parse-attributes -fsyntax-only -verify %s
+// RUN: %clang_cc1 -DNEEDS_LATE_PARSING -fsyntax-only -verify %s
+
+// RUN: %clang_cc1 -UNEEDS_LATE_PARSING -fno-experimental-late-parse-attributes -fsyntax-only -verify=ok %s
+// RUN: %clang_cc1 -UNEEDS_LATE_PARSING -fsyntax-only -verify=ok %s
+
+#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f)))
+
+struct size_known { int dummy; };
+
+#ifdef NEEDS_LATE_PARSING
+struct on_decl {
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known *buf __counted_by_or_null(count);
+ int count;
+};
+
+#else
+
+// ok-no-diagnostics
+struct on_decl {
+ int count;
+ struct size_known *buf __counted_by_or_null(count);
+};
+
+#endif
diff --git a/clang/test/Sema/attr-counted-by-or-null-late-parsed-struct-ptrs.c b/clang/test/Sema/attr-counted-by-or-null-late-parsed-struct-ptrs.c
new file mode 100644
index 0000000000000..4c5c0ebfb52c3
--- /dev/null
+++ b/clang/test/Sema/attr-counted-by-or-null-late-parsed-struct-ptrs.c
@@ -0,0 +1,255 @@
+// RUN: %clang_cc1 -fexperimental-late-parse-attributes -fsyntax-only -verify %s
+
+#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f)))
+#define __counted_by(f) __attribute__((counted_by(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+typedef void(*fn_ptr_ty)(void);
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ struct size_known * buf __counted_by_or_null(count);
+ int count;
+};
+
+struct on_member_pointer_incomplete_ty {
+ struct size_unknown * buf __counted_by_or_null(count); // expected-error{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct size_unknown' is an incomplete type}}
+ int count;
+};
+
+struct on_member_pointer_const_incomplete_ty {
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'const struct size_unknown' is an incomplete type}}
+ const struct size_unknown * buf __counted_by_or_null(count);
+ int count;
+};
+
+struct on_member_pointer_void_ty {
+ void* buf __counted_by_or_null(count); // expected-error{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void' is an incomplete type}}
+ int count;
+};
+
+struct on_member_pointer_fn_ptr_ty {
+ // buffer of `count` function pointers is allowed
+ void (**fn_ptr)(void) __counted_by_or_null(count);
+ int count;
+};
+
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty {
+ // buffer of `count` function pointers is allowed
+ fn_ptr_ty* fn_ptr __counted_by_or_null(count);
+ int count;
+};
+
+struct on_member_pointer_fn_ty {
+ // buffer of `count` functions is not allowed
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void (void)' is a function type}}
+ void (*fn_ptr)(void) __counted_by_or_null(count);
+ int count;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty {
+ // buffer of `count` functions is not allowed
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void (void)' is a function type}}
+ fn_ptr_ty fn_ptr __counted_by_or_null(count);
+ int count;
+};
+
+struct has_unannotated_vla {
+ int count;
+ int buffer[];
+};
+
+struct on_member_pointer_struct_with_vla {
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct has_unannotated_vla' is a struct type with a flexible array member}}
+ struct has_unannotated_vla* objects __counted_by_or_null(count);
+ int count;
+};
+
+struct has_annotated_vla {
+ int count;
+ int buffer[] __counted_by(count);
+};
+
+// Currently prevented because computing the size of `objects` at runtime would
+// require an O(N) walk of `objects` to take into account the length of the VLA
+// in each struct instance.
+struct on_member_pointer_struct_with_annotated_vla {
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct has_annotated_vla' is a struct type with a flexible array member}}
+ struct has_annotated_vla* objects __counted_by_or_null(count);
+ int count;
+};
+
+struct on_pointer_anon_buf {
+ // TODO: Support referring to parent scope
+ struct {
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known *buf __counted_by_or_null(count);
+ };
+ int count;
+};
+
+struct on_pointer_anon_count {
+ struct size_known *buf __counted_by_or_null(count);
+ struct {
+ int count;
+ };
+};
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse counted_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute and is **not** late parsed resulting in the `count`
+// field being unavailable.
+
+struct on_member_pointer_complete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known *__counted_by_or_null(count) buf;
+ int count;
+};
+
+struct on_member_pointer_incomplete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_unknown * __counted_by_or_null(count) buf;
+ int count;
+};
+
+struct on_member_pointer_const_incomplete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ const struct size_unknown * __counted_by_or_null(count) buf;
+ int count;
+};
+
+struct on_member_pointer_void_ty_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being an incomplete type.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ void *__counted_by_or_null(count) buf;
+ int count;
+};
+
+// -
+
+struct on_member_pointer_fn_ptr_ty_pos {
+ // TODO: buffer of `count` function pointers should be allowed
+ // but fails because this isn't late parsed.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ void (** __counted_by_or_null(count) fn_ptr)(void);
+ int count;
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty_pos {
+ // TODO: buffer of `count` function pointers should be allowed
+ // but fails because this isn't late parsed.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ fn_ptr_ty* __counted_by_or_null(count) fn_ptr;
+ int count;
+};
+
+struct on_member_pointer_fn_ty_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being a function type.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ void (* __counted_by_or_null(count) fn_ptr)(void);
+ int count;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos {
+ // TODO: buffer of `count` function pointers should be allowed
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ void (** __counted_by_or_null(count) fn_ptr)(void);
+ int count;
+};
+
+struct on_member_pointer_fn_ptr_ty_typedef_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being a function type.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ fn_ptr_ty __counted_by_or_null(count) fn_ptr;
+ int count;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being a function type.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ void (* __counted_by_or_null(count) * fn_ptr)(void);
+ int count;
+};
+
+struct on_member_pointer_struct_with_vla_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being a struct type with a VLA.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct has_unannotated_vla *__counted_by_or_null(count) objects;
+ int count;
+};
+
+struct on_member_pointer_struct_with_annotated_vla_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being a struct type with a VLA.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct has_annotated_vla* __counted_by_or_null(count) objects;
+ int count;
+};
+
+struct on_nested_pointer_inner {
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__counted_by_or_null` can only be nested when used in function parameters.
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known *__counted_by_or_null(count) *buf;
+ int count;
+};
+
+struct on_nested_pointer_outer {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known **__counted_by_or_null(count) buf;
+ int count;
+};
+
+struct on_pointer_anon_buf_ty_pos {
+ struct {
+ // TODO: Support referring to parent scope
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known * __counted_by_or_null(count) buf;
+ };
+ int count;
+};
+
+struct on_pointer_anon_count_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known *__counted_by_or_null(count) buf;
+ struct {
+ int count;
+ };
+};
+
+//==============================================================================
+// __counted_by_or_null on struct non-pointer members
+//==============================================================================
+
+struct on_pod_ty {
+ // expected-error at +1{{'counted_by_or_null' only applies to pointers}}
+ int wrong_ty __counted_by_or_null(count);
+ int count;
+};
+
+struct on_void_ty {
+ // expected-error at +2{{'counted_by_or_null' only applies to pointers}}
+ // expected-error at +1{{field has incomplete type 'void'}}
+ void wrong_ty __counted_by_or_null(count);
+ int count;
+};
diff --git a/clang/test/Sema/attr-counted-by-or-null-struct-ptrs-sizeless-types.c b/clang/test/Sema/attr-counted-by-or-null-struct-ptrs-sizeless-types.c
new file mode 100644
index 0000000000000..3c84b90fac3ad
--- /dev/null
+++ b/clang/test/Sema/attr-counted-by-or-null-struct-ptrs-sizeless-types.c
@@ -0,0 +1,17 @@
+// __SVInt8_t is specific to ARM64 so specify that in the target triple
+// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -verify %s
+
+#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f)))
+
+struct on_sizeless_pointee_ty {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because '__SVInt8_t' is a sizeless type}}
+ __SVInt8_t* member __counted_by_or_null(count);
+};
+
+struct on_sizeless_ty {
+ int count;
+ // expected-error at +2{{'counted_by_or_null' only applies to pointers}}
+ // expected-error at +1{{field has sizeless type '__SVInt8_t'}}
+ __SVInt8_t member __counted_by_or_null(count);
+};
diff --git a/clang/test/Sema/attr-counted-by-or-null-struct-ptrs.c b/clang/test/Sema/attr-counted-by-or-null-struct-ptrs.c
new file mode 100644
index 0000000000000..a38b363d1b5b2
--- /dev/null
+++ b/clang/test/Sema/attr-counted-by-or-null-struct-ptrs.c
@@ -0,0 +1,225 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f)))
+#define __counted_by(f) __attribute__((counted_by(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+typedef void(*fn_ptr_ty)(void);
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ int count;
+ struct size_known * buf __counted_by_or_null(count);
+};
+
+struct on_member_pointer_incomplete_ty {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct size_unknown' is an incomplete type}}
+ struct size_unknown * buf __counted_by_or_null(count);
+};
+
+struct on_member_pointer_const_incomplete_ty {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'const struct size_unknown' is an incomplete type}}
+ const struct size_unknown * buf __counted_by_or_null(count);
+};
+
+struct on_member_pointer_void_ty {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void' is an incomplete type}}
+ void* buf __counted_by_or_null(count);
+};
+
+struct on_member_pointer_fn_ptr_ty {
+ int count;
+ // buffer of `count` function pointers is allowed
+ void (**fn_ptr)(void) __counted_by_or_null(count);
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty {
+ int count;
+ // buffer of `count` function pointers is allowed
+ fn_ptr_ty* fn_ptr __counted_by_or_null(count);
+};
+
+struct on_member_pointer_fn_ty {
+ int count;
+ // buffer of `count` functions is not allowed
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void (void)' is a function type}}
+ void (*fn_ptr)(void) __counted_by_or_null(count);
+};
+
+struct on_member_pointer_fn_ptr_ty_ty {
+ int count;
+ // buffer of `count` functions is not allowed
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void (void)' is a function type}}
+ fn_ptr_ty fn_ptr __counted_by_or_null(count);
+};
+
+struct has_unannotated_vla {
+ int count;
+ int buffer[];
+};
+
+struct on_member_pointer_struct_with_vla {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct has_unannotated_vla' is a struct type with a flexible array member}}
+ struct has_unannotated_vla* objects __counted_by_or_null(count);
+};
+
+struct has_annotated_vla {
+ int count;
+ int buffer[] __counted_by(count);
+};
+
+// Currently prevented because computing the size of `objects` at runtime would
+// require an O(N) walk of `objects` to take into account the length of the VLA
+// in each struct instance.
+struct on_member_pointer_struct_with_annotated_vla {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct has_annotated_vla' is a struct type with a flexible array member}}
+ struct has_annotated_vla* objects __counted_by_or_null(count);
+};
+
+struct on_pointer_anon_buf {
+ int count;
+ struct {
+ struct size_known *buf __counted_by_or_null(count);
+ };
+};
+
+struct on_pointer_anon_count {
+ struct {
+ int count;
+ };
+ struct size_known *buf __counted_by_or_null(count);
+};
+
+//==============================================================================
+// __counted_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse counted_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute
+
+struct on_member_pointer_complete_ty_ty_pos {
+ int count;
+ struct size_known *__counted_by_or_null(count) buf;
+};
+
+struct on_member_pointer_incomplete_ty_ty_pos {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct size_unknown' is an incomplete type}}
+ struct size_unknown * __counted_by_or_null(count) buf;
+};
+
+struct on_member_pointer_const_incomplete_ty_ty_pos {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'const struct size_unknown' is an incomplete type}}
+ const struct size_unknown * __counted_by_or_null(count) buf;
+};
+
+struct on_member_pointer_void_ty_ty_pos {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void' is an incomplete type}}
+ void *__counted_by_or_null(count) buf;
+};
+
+// -
+
+struct on_member_pointer_fn_ptr_ty_pos {
+ int count;
+ // buffer of `count` function pointers is allowed
+ void (** __counted_by_or_null(count) fn_ptr)(void);
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty_pos {
+ int count;
+ // buffer of `count` function pointers is allowed
+ fn_ptr_ty* __counted_by_or_null(count) fn_ptr;
+};
+
+struct on_member_pointer_fn_ty_ty_pos {
+ int count;
+ // buffer of `count` functions is not allowed
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void (void)' is a function type}}
+ void (* __counted_by_or_null(count) fn_ptr)(void);
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos {
+ int count;
+ // buffer of `count` functions is not allowed
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'void (void)' is a function type}}
+ fn_ptr_ty __counted_by_or_null(count) fn_ptr;
+};
+
+// TODO: This should be forbidden but isn't due to counted_by_or_null being treated
+// as a declaration attribute.
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ int count;
+ void (* __counted_by_or_null(count) * fn_ptr)(void);
+};
+
+struct on_member_pointer_struct_with_vla_ty_pos {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct has_unannotated_vla' is a struct type with a flexible array member}}
+ struct has_unannotated_vla *__counted_by_or_null(count) objects;
+};
+
+// Currently prevented because computing the size of `objects` at runtime would
+// require an O(N) walk of `objects` to take into account the length of the VLA
+// in each struct instance.
+struct on_member_pointer_struct_with_annotated_vla_ty_pos {
+ int count;
+ // expected-error at +1{{counted_by_or_null' cannot be applied to a pointer with pointee of unknown size because 'struct has_annotated_vla' is a struct type with a flexible array member}}
+ struct has_annotated_vla* __counted_by_or_null(count) objects;
+};
+
+struct on_nested_pointer_inner {
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__counted_by_or_null` can only be nested when used in function parameters.
+ int count;
+ struct size_known *__counted_by_or_null(count) *buf;
+};
+
+struct on_nested_pointer_outer {
+ int count;
+ struct size_known **__counted_by_or_null(count) buf;
+};
+
+struct on_pointer_anon_buf_ty_pos {
+ int count;
+ struct {
+ struct size_known * __counted_by_or_null(count) buf;
+ };
+};
+
+struct on_pointer_anon_count_ty_pos {
+ struct {
+ int count;
+ };
+ struct size_known *__counted_by_or_null(count) buf;
+};
+
+//==============================================================================
+// __counted_by_or_null on struct non-pointer members
+//==============================================================================
+
+struct on_pod_ty {
+ int count;
+ // expected-error at +1{{'counted_by_or_null' only applies to pointers}}
+ int wrong_ty __counted_by_or_null(count);
+};
+
+struct on_void_ty {
+ int count;
+ // expected-error at +2{{'counted_by_or_null' only applies to pointers}}
+ // expected-error at +1{{field has incomplete type 'void'}}
+ void wrong_ty __counted_by_or_null(count);
+};
diff --git a/clang/test/Sema/attr-counted-by-or-null-vla-sizeless-types.c b/clang/test/Sema/attr-counted-by-or-null-vla-sizeless-types.c
new file mode 100644
index 0000000000000..23298bb4ec2f6
--- /dev/null
+++ b/clang/test/Sema/attr-counted-by-or-null-vla-sizeless-types.c
@@ -0,0 +1,11 @@
+// __SVInt8_t is specific to ARM64 so specify that in the target triple
+// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -verify %s
+
+#define __counted_by_or_null(f) __attribute__((counted_by_or_null(f)))
+
+struct on_sizeless_elt_ty {
+ int count;
+ // expected-error at +2{{'counted_by_or_null' only applies to pointers}}
+ // expected-error at +1{{array has sizeless element type '__SVInt8_t'}}
+ __SVInt8_t arr[] __counted_by_or_null(count);
+};
diff --git a/clang/test/Sema/attr-sized-by-late-parsed-off.c b/clang/test/Sema/attr-sized-by-late-parsed-off.c
new file mode 100644
index 0000000000000..e43125c8ce2f9
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-late-parsed-off.c
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -DNEEDS_LATE_PARSING -fno-experimental-late-parse-attributes -fsyntax-only -verify %s
+// RUN: %clang_cc1 -DNEEDS_LATE_PARSING -fsyntax-only -verify %s
+
+// RUN: %clang_cc1 -UNEEDS_LATE_PARSING -fno-experimental-late-parse-attributes -fsyntax-only -verify=ok %s
+// RUN: %clang_cc1 -UNEEDS_LATE_PARSING -fsyntax-only -verify=ok %s
+
+#define __sized_by(f) __attribute__((sized_by(f)))
+
+struct size_known { int dummy; };
+
+#ifdef NEEDS_LATE_PARSING
+struct on_decl {
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known *buf __sized_by(count);
+ int count;
+};
+
+#else
+
+// ok-no-diagnostics
+struct on_decl {
+ int count;
+ struct size_known *buf __sized_by(count);
+};
+
+#endif
diff --git a/clang/test/Sema/attr-sized-by-late-parsed-struct-ptrs.c b/clang/test/Sema/attr-sized-by-late-parsed-struct-ptrs.c
new file mode 100644
index 0000000000000..b58e6eeb2a02f
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-late-parsed-struct-ptrs.c
@@ -0,0 +1,243 @@
+// RUN: %clang_cc1 -fexperimental-late-parse-attributes -fsyntax-only -verify %s
+
+#define __sized_by(f) __attribute__((sized_by(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+typedef void(*fn_ptr_ty)(void);
+
+//==============================================================================
+// __sized_by on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ struct size_known * buf __sized_by(size);
+ int size;
+};
+
+struct on_member_pointer_incomplete_ty {
+ struct size_unknown * buf __sized_by(size);
+ int size;
+};
+
+struct on_member_pointer_const_incomplete_ty {
+ const struct size_unknown * buf __sized_by(size);
+ int size;
+};
+
+struct on_member_pointer_void_ty {
+ void* buf __sized_by(size);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty {
+ // buffer of `size` function pointers is allowed
+ void (**fn_ptr)(void) __sized_by(size);
+ int size;
+};
+
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty {
+ // buffer of `size` function pointers is allowed
+ fn_ptr_ty* fn_ptr __sized_by(size);
+ int size;
+};
+
+struct on_member_pointer_fn_ty {
+ // buffer of function(s) with size `size` is allowed
+ void (*fn_ptr)(void) __sized_by(size);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty {
+ // buffer of function(s) with size `size` is allowed
+ fn_ptr_ty fn_ptr __sized_by(size);
+ int size;
+};
+
+struct has_unannotated_vla {
+ int size;
+ int buffer[];
+};
+
+struct on_member_pointer_struct_with_vla {
+ struct has_unannotated_vla* objects __sized_by(size);
+ int size;
+};
+
+struct has_annotated_vla {
+ int size;
+ // expected-error at +1{{'sized_by' only applies to pointers}}
+ int buffer[] __sized_by(size);
+};
+
+struct on_member_pointer_struct_with_annotated_vla {
+ struct has_annotated_vla* objects __sized_by(size);
+ int size;
+};
+
+struct on_pointer_anon_buf {
+ // TODO: Support referring to parent scope
+ struct {
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *buf __sized_by(size);
+ };
+ int size;
+};
+
+struct on_pointer_anon_count {
+ struct size_known *buf __sized_by(size);
+ struct {
+ int size;
+ };
+};
+
+//==============================================================================
+// __sized_by on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by as a type attribute. Currently it is parsed
+// as a declaration attribute and is **not** late parsed resulting in the `size`
+// field being unavailable.
+
+struct on_member_pointer_complete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *__sized_by(size) buf;
+ int size;
+};
+
+struct on_member_pointer_incomplete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_unknown * __sized_by(size) buf;
+ int size;
+};
+
+struct on_member_pointer_const_incomplete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ const struct size_unknown * __sized_by(size) buf;
+ int size;
+};
+
+struct on_member_pointer_void_ty_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being an incomplete type.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void *__sized_by(size) buf;
+ int size;
+};
+
+// -
+
+struct on_member_pointer_fn_ptr_ty_pos {
+ // TODO: buffer of `size` function pointers should be allowed
+ // but fails because this isn't late parsed.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (** __sized_by(size) fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty_pos {
+ // TODO: buffer of `size` function pointers should be allowed
+ // but fails because this isn't late parsed.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ fn_ptr_ty* __sized_by(size) fn_ptr;
+ int size;
+};
+
+struct on_member_pointer_fn_ty_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being a function type.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (* __sized_by(size) fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos {
+ // TODO: buffer of `size` function pointers should be allowed
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (** __sized_by(size) fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_typedef_ty_pos {
+ // TODO: This should be allowed with sized_by.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ fn_ptr_ty __sized_by(size) fn_ptr;
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ // TODO: This should be allowed with sized_by.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (* __sized_by(size) * fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_struct_with_vla_ty_pos {
+ // TODO: This should be allowed with sized_by.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct has_unannotated_vla *__sized_by(size) objects;
+ int size;
+};
+
+struct on_member_pointer_struct_with_annotated_vla_ty_pos {
+ // TODO: This should be allowed with sized_by.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct has_annotated_vla* __sized_by(size) objects;
+ int size;
+};
+
+struct on_nested_pointer_inner {
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__sized_by` can only be nested when used in function parameters.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *__sized_by(size) *buf;
+ int size;
+};
+
+struct on_nested_pointer_outer {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known **__sized_by(size) buf;
+ int size;
+};
+
+struct on_pointer_anon_buf_ty_pos {
+ struct {
+ // TODO: Support referring to parent scope
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known * __sized_by(size) buf;
+ };
+ int size;
+};
+
+struct on_pointer_anon_count_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *__sized_by(size) buf;
+ struct {
+ int size;
+ };
+};
+
+//==============================================================================
+// __sized_by on struct non-pointer members
+//==============================================================================
+
+struct on_pod_ty {
+ // expected-error at +1{{'sized_by' only applies to pointers}}
+ int wrong_ty __sized_by(size);
+ int size;
+};
+
+struct on_void_ty {
+ // expected-error at +2{{'sized_by' only applies to pointers}}
+ // expected-error at +1{{field has incomplete type 'void'}}
+ void wrong_ty __sized_by(size);
+ int size;
+};
diff --git a/clang/test/Sema/attr-sized-by-or-null-late-parsed-off.c b/clang/test/Sema/attr-sized-by-or-null-late-parsed-off.c
new file mode 100644
index 0000000000000..8bc775f196c18
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-or-null-late-parsed-off.c
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -DNEEDS_LATE_PARSING -fno-experimental-late-parse-attributes -fsyntax-only -verify %s
+// RUN: %clang_cc1 -DNEEDS_LATE_PARSING -fsyntax-only -verify %s
+
+// RUN: %clang_cc1 -UNEEDS_LATE_PARSING -fno-experimental-late-parse-attributes -fsyntax-only -verify=ok %s
+// RUN: %clang_cc1 -UNEEDS_LATE_PARSING -fsyntax-only -verify=ok %s
+
+#define __sized_by_or_null(f) __attribute__((sized_by_or_null(f)))
+
+struct size_known { int dummy; };
+
+#ifdef NEEDS_LATE_PARSING
+struct on_decl {
+ // expected-error at +1{{use of undeclared identifier 'count'}}
+ struct size_known *buf __sized_by_or_null(count);
+ int count;
+};
+
+#else
+
+// ok-no-diagnostics
+struct on_decl {
+ int count;
+ struct size_known *buf __sized_by_or_null(count);
+};
+
+#endif
diff --git a/clang/test/Sema/attr-sized-by-or-null-late-parsed-struct-ptrs.c b/clang/test/Sema/attr-sized-by-or-null-late-parsed-struct-ptrs.c
new file mode 100644
index 0000000000000..0ddcd46c6cfb3
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-or-null-late-parsed-struct-ptrs.c
@@ -0,0 +1,243 @@
+// RUN: %clang_cc1 -fexperimental-late-parse-attributes -fsyntax-only -verify %s
+
+#define __sized_by_or_null(f) __attribute__((__sized_by_or_null__(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+typedef void(*fn_ptr_ty)(void);
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ struct size_known * buf __sized_by_or_null(size);
+ int size;
+};
+
+struct on_member_pointer_incomplete_ty {
+ struct size_unknown * buf __sized_by_or_null(size);
+ int size;
+};
+
+struct on_member_pointer_const_incomplete_ty {
+ const struct size_unknown * buf __sized_by_or_null(size);
+ int size;
+};
+
+struct on_member_pointer_void_ty {
+ void* buf __sized_by_or_null(size);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty {
+ // buffer of `size` function pointers is allowed
+ void (**fn_ptr)(void) __sized_by_or_null(size);
+ int size;
+};
+
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty {
+ // buffer of `size` function pointers is allowed
+ fn_ptr_ty* fn_ptr __sized_by_or_null(size);
+ int size;
+};
+
+struct on_member_pointer_fn_ty {
+ // buffer of function(s) with size `size` is allowed
+ void (*fn_ptr)(void) __sized_by_or_null(size);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty {
+ // buffer of function(s) with size `size` is allowed
+ fn_ptr_ty fn_ptr __sized_by_or_null(size);
+ int size;
+};
+
+struct has_unannotated_vla {
+ int size;
+ int buffer[];
+};
+
+struct on_member_pointer_struct_with_vla {
+ struct has_unannotated_vla* objects __sized_by_or_null(size);
+ int size;
+};
+
+struct has_annotated_vla {
+ int size;
+ // expected-error at +1{{'sized_by_or_null' only applies to pointers}}
+ int buffer[] __sized_by_or_null(size);
+};
+
+struct on_member_pointer_struct_with_annotated_vla {
+ struct has_annotated_vla* objects __sized_by_or_null(size);
+ int size;
+};
+
+struct on_pointer_anon_buf {
+ // TODO: Support referring to parent scope
+ struct {
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *buf __sized_by_or_null(size);
+ };
+ int size;
+};
+
+struct on_pointer_anon_count {
+ struct size_known *buf __sized_by_or_null(size);
+ struct {
+ int size;
+ };
+};
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute and is **not** late parsed resulting in the `size`
+// field being unavailable.
+
+struct on_member_pointer_complete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *__sized_by_or_null(size) buf;
+ int size;
+};
+
+struct on_member_pointer_incomplete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_unknown * __sized_by_or_null(size) buf;
+ int size;
+};
+
+struct on_member_pointer_const_incomplete_ty_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ const struct size_unknown * __sized_by_or_null(size) buf;
+ int size;
+};
+
+struct on_member_pointer_void_ty_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being an incomplete type.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void *__sized_by_or_null(size) buf;
+ int size;
+};
+
+// -
+
+struct on_member_pointer_fn_ptr_ty_pos {
+ // TODO: buffer of `size` function pointers should be allowed
+ // but fails because this isn't late parsed.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (** __sized_by_or_null(size) fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty_pos {
+ // TODO: buffer of `size` function pointers should be allowed
+ // but fails because this isn't late parsed.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ fn_ptr_ty* __sized_by_or_null(size) fn_ptr;
+ int size;
+};
+
+struct on_member_pointer_fn_ty_ty_pos {
+ // TODO: This should fail because the attribute is
+ // on a pointer with the pointee being a function type.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (* __sized_by_or_null(size) fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos {
+ // TODO: buffer of `size` function pointers should be allowed
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (** __sized_by_or_null(size) fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_typedef_ty_pos {
+ // TODO: This should be allowed with sized_by_or_null.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ fn_ptr_ty __sized_by_or_null(size) fn_ptr;
+ int size;
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ // TODO: This should be allowed with sized_by_or_null.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ void (* __sized_by_or_null(size) * fn_ptr)(void);
+ int size;
+};
+
+struct on_member_pointer_struct_with_vla_ty_pos {
+ // TODO: This should be allowed with sized_by_or_null.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct has_unannotated_vla *__sized_by_or_null(size) objects;
+ int size;
+};
+
+struct on_member_pointer_struct_with_annotated_vla_ty_pos {
+ // TODO: This should be allowed with sized_by_or_null.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct has_annotated_vla* __sized_by_or_null(size) objects;
+ int size;
+};
+
+struct on_nested_pointer_inner {
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__sized_by_or_null` can only be nested when used in function parameters.
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *__sized_by_or_null(size) *buf;
+ int size;
+};
+
+struct on_nested_pointer_outer {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known **__sized_by_or_null(size) buf;
+ int size;
+};
+
+struct on_pointer_anon_buf_ty_pos {
+ struct {
+ // TODO: Support referring to parent scope
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known * __sized_by_or_null(size) buf;
+ };
+ int size;
+};
+
+struct on_pointer_anon_count_ty_pos {
+ // TODO: Allow this
+ // expected-error at +1{{use of undeclared identifier 'size'}}
+ struct size_known *__sized_by_or_null(size) buf;
+ struct {
+ int size;
+ };
+};
+
+//==============================================================================
+// __sized_by_or_null on struct non-pointer members
+//==============================================================================
+
+struct on_pod_ty {
+ // expected-error at +1{{'sized_by_or_null' only applies to pointers}}
+ int wrong_ty __sized_by_or_null(size);
+ int size;
+};
+
+struct on_void_ty {
+ // expected-error at +2{{'sized_by_or_null' only applies to pointers}}
+ // expected-error at +1{{field has incomplete type 'void'}}
+ void wrong_ty __sized_by_or_null(size);
+ int size;
+};
diff --git a/clang/test/Sema/attr-sized-by-or-null-struct-ptrs-sizeless-types.c b/clang/test/Sema/attr-sized-by-or-null-struct-ptrs-sizeless-types.c
new file mode 100644
index 0000000000000..af14038ab2575
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-or-null-struct-ptrs-sizeless-types.c
@@ -0,0 +1,16 @@
+// __SVInt8_t is specific to ARM64 so specify that in the target triple
+// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -verify %s
+
+#define __sized_by_or_null(f) __attribute__((sized_by_or_null(f)))
+
+struct on_sizeless_pointee_ty {
+ int size;
+ __SVInt8_t* member __sized_by_or_null(size);
+};
+
+struct on_sizeless_ty {
+ int size;
+ // expected-error at +2{{'sized_by_or_null' only applies to pointers}}
+ // expected-error at +1{{field has sizeless type '__SVInt8_t'}}
+ __SVInt8_t member __sized_by_or_null(size);
+};
diff --git a/clang/test/Sema/attr-sized-by-or-null-struct-ptrs.c b/clang/test/Sema/attr-sized-by-or-null-struct-ptrs.c
new file mode 100644
index 0000000000000..2dd963afad7a4
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-or-null-struct-ptrs.c
@@ -0,0 +1,211 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+#define __sized_by_or_null(f) __attribute__((sized_by_or_null(f)))
+#define __counted_by(f) __attribute__((counted_by(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+typedef void(*fn_ptr_ty)(void);
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ int size;
+ struct size_known * buf __sized_by_or_null(size);
+};
+
+struct on_member_pointer_incomplete_ty {
+ int size;
+ struct size_unknown * buf __sized_by_or_null(size);
+};
+
+struct on_member_pointer_const_incomplete_ty {
+ int size;
+ const struct size_unknown * buf __sized_by_or_null(size);
+};
+
+struct on_member_pointer_void_ty {
+ int size;
+ void* buf __sized_by_or_null(size);
+};
+
+struct on_member_pointer_fn_ptr_ty {
+ int size;
+ // buffer of function pointers with size `size` is allowed
+ void (**fn_ptr)(void) __sized_by_or_null(size);
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty {
+ int size;
+ // buffer of function pointers with size `size` is allowed
+ fn_ptr_ty* fn_ptr __sized_by_or_null(size);
+};
+
+struct on_member_pointer_fn_ty {
+ int size;
+ // buffer of functions with size `size` is allowed
+ void (*fn_ptr)(void) __sized_by_or_null(size);
+};
+
+struct on_member_pointer_fn_ptr_ty_ty {
+ int size;
+ // buffer of functions with size `size` is allowed
+ fn_ptr_ty fn_ptr __sized_by_or_null(size);
+};
+
+struct has_unannotated_vla {
+ int count;
+ int buffer[];
+};
+
+struct on_member_pointer_struct_with_vla {
+ int size;
+ // we know the size so this is fine for tracking size, however indexing would be an issue
+ struct has_unannotated_vla* objects __sized_by_or_null(size);
+};
+
+struct has_annotated_vla {
+ int count;
+ int buffer[] __counted_by(count);
+};
+
+struct on_member_pointer_struct_with_annotated_vla {
+ int size;
+ // we know the size so this is fine for tracking size, however indexing would be an issue
+ struct has_annotated_vla* objects __sized_by_or_null(size);
+};
+
+struct on_pointer_anon_buf {
+ int size;
+ struct {
+ struct size_known *buf __sized_by_or_null(size);
+ };
+};
+
+struct on_pointer_anon_size {
+ struct {
+ int size;
+ };
+ struct size_known *buf __sized_by_or_null(size);
+};
+
+//==============================================================================
+// __sized_by_or_null on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by_or_null as a type attribute. Currently it is parsed
+// as a declaration attribute
+
+struct on_member_pointer_complete_ty_ty_pos {
+ int size;
+ struct size_known *__sized_by_or_null(size) buf;
+};
+
+struct on_member_pointer_incomplete_ty_ty_pos {
+ int size;
+ struct size_unknown * __sized_by_or_null(size) buf;
+};
+
+struct on_member_pointer_const_incomplete_ty_ty_pos {
+ int size;
+ const struct size_unknown * __sized_by_or_null(size) buf;
+};
+
+struct on_member_pointer_void_ty_ty_pos {
+ int size;
+ void *__sized_by_or_null(size) buf;
+};
+
+// -
+
+struct on_member_pointer_fn_ptr_ty_pos {
+ int size;
+ // buffer of `size` function pointers is allowed
+ void (** __sized_by_or_null(size) fn_ptr)(void);
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty_pos {
+ int size;
+ // buffer of `size` function pointers is allowed
+ fn_ptr_ty* __sized_by_or_null(size) fn_ptr;
+};
+
+struct on_member_pointer_fn_ty_ty_pos {
+ int size;
+ void (* __sized_by_or_null(size) fn_ptr)(void);
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos {
+ int size;
+ fn_ptr_ty __sized_by_or_null(size) fn_ptr;
+};
+
+// TODO: This should be forbidden but isn't due to sized_by_or_null being treated
+// as a declaration attribute.
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ int size;
+ void (* __sized_by_or_null(size) * fn_ptr)(void);
+};
+
+struct on_member_pointer_struct_with_vla_ty_pos {
+ int size;
+ struct has_unannotated_vla *__sized_by_or_null(size) objects;
+};
+
+struct on_member_pointer_struct_with_annotated_vla_ty_pos {
+ int size;
+ struct has_annotated_vla* __sized_by_or_null(size) objects;
+};
+
+struct on_nested_pointer_inner {
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__sized_by_or_null` can only be nested when used in function parameters.
+ int size;
+ struct size_known *__sized_by_or_null(size) *buf;
+};
+
+struct on_nested_pointer_outer {
+ int size;
+ struct size_known **__sized_by_or_null(size) buf;
+};
+
+struct on_pointer_anon_buf_ty_pos {
+ int size;
+ struct {
+ struct size_known * __sized_by_or_null(size) buf;
+ };
+};
+
+struct on_pointer_anon_size_ty_pos {
+ struct {
+ int size;
+ };
+ struct size_known *__sized_by_or_null(size) buf;
+};
+
+//==============================================================================
+// __sized_by_or_null on struct non-pointer members
+//==============================================================================
+
+struct on_pod_ty {
+ int size;
+ // expected-error at +1{{'sized_by_or_null' only applies to pointers}}
+ int wrong_ty __sized_by_or_null(size);
+};
+
+struct on_void_ty {
+ int size;
+ // expected-error at +2{{'sized_by_or_null' only applies to pointers}}
+ // expected-error at +1{{field has incomplete type 'void'}}
+ void wrong_ty __sized_by_or_null(size);
+};
+
+struct on_member_array_complete_ty {
+ int size;
+ // expected-error at +1{{'sized_by_or_null' only applies to pointers}}
+ struct size_known array[] __sized_by_or_null(size);
+};
diff --git a/clang/test/Sema/attr-sized-by-or-null-vla-sizeless-types.c b/clang/test/Sema/attr-sized-by-or-null-vla-sizeless-types.c
new file mode 100644
index 0000000000000..ec6397e5cf9ac
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-or-null-vla-sizeless-types.c
@@ -0,0 +1,11 @@
+// __SVInt8_t is specific to ARM64 so specify that in the target triple
+// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -verify %s
+
+#define __sized_by_or_null(f) __attribute__((sized_by_or_null(f)))
+
+struct on_sizeless_elt_ty {
+ int count;
+ // expected-error at +2{{'sized_by_or_null' only applies to pointers}}
+ // expected-error at +1{{array has sizeless element type '__SVInt8_t'}}
+ __SVInt8_t arr[] __sized_by_or_null(count);
+};
diff --git a/clang/test/Sema/attr-sized-by-struct-ptrs-sizeless-types.c b/clang/test/Sema/attr-sized-by-struct-ptrs-sizeless-types.c
new file mode 100644
index 0000000000000..3c66b497d6626
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-struct-ptrs-sizeless-types.c
@@ -0,0 +1,16 @@
+// __SVInt8_t is specific to ARM64 so specify that in the target triple
+// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -verify %s
+
+#define __sized_by(f) __attribute__((sized_by(f)))
+
+struct on_sizeless_pointee_ty {
+ int count;
+ __SVInt8_t* member __sized_by(count);
+};
+
+struct on_sizeless_ty {
+ int count;
+ // expected-error at +2{{'sized_by' only applies to pointers}}
+ // expected-error at +1{{field has sizeless type '__SVInt8_t'}}
+ __SVInt8_t member __sized_by(count);
+};
diff --git a/clang/test/Sema/attr-sized-by-struct-ptrs.c b/clang/test/Sema/attr-sized-by-struct-ptrs.c
new file mode 100644
index 0000000000000..e155a9398758e
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-struct-ptrs.c
@@ -0,0 +1,211 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+#define __sized_by(f) __attribute__((sized_by(f)))
+#define __counted_by(f) __attribute__((counted_by(f)))
+
+struct size_unknown;
+struct size_known {
+ int field;
+};
+
+typedef void(*fn_ptr_ty)(void);
+
+//==============================================================================
+// __sized_by on struct member pointer in decl attribute position
+//==============================================================================
+
+struct on_member_pointer_complete_ty {
+ int size;
+ struct size_known * buf __sized_by(size);
+};
+
+struct on_member_pointer_incomplete_ty {
+ int size;
+ struct size_unknown * buf __sized_by(size);
+};
+
+struct on_member_pointer_const_incomplete_ty {
+ int size;
+ const struct size_unknown * buf __sized_by(size);
+};
+
+struct on_member_pointer_void_ty {
+ int size;
+ void* buf __sized_by(size);
+};
+
+struct on_member_pointer_fn_ptr_ty {
+ int size;
+ // buffer of function pointers with size `size` is allowed
+ void (**fn_ptr)(void) __sized_by(size);
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty {
+ int size;
+ // buffer of function pointers with size `size` is allowed
+ fn_ptr_ty* fn_ptr __sized_by(size);
+};
+
+struct on_member_pointer_fn_ty {
+ int size;
+ // buffer of functions with size `size` is allowed
+ void (*fn_ptr)(void) __sized_by(size);
+};
+
+struct on_member_pointer_fn_ptr_ty_ty {
+ int size;
+ // buffer of functions with size `size` is allowed
+ fn_ptr_ty fn_ptr __sized_by(size);
+};
+
+struct has_unannotated_vla {
+ int count;
+ int buffer[];
+};
+
+struct on_member_pointer_struct_with_vla {
+ int size;
+ // we know the size so this is fine for tracking size, however indexing would be an issue
+ struct has_unannotated_vla* objects __sized_by(size);
+};
+
+struct has_annotated_vla {
+ int count;
+ int buffer[] __counted_by(count);
+};
+
+struct on_member_pointer_struct_with_annotated_vla {
+ int size;
+ // we know the size so this is fine for tracking size, however indexing would be an issue
+ struct has_annotated_vla* objects __sized_by(size);
+};
+
+struct on_pointer_anon_buf {
+ int size;
+ struct {
+ struct size_known *buf __sized_by(size);
+ };
+};
+
+struct on_pointer_anon_size {
+ struct {
+ int size;
+ };
+ struct size_known *buf __sized_by(size);
+};
+
+//==============================================================================
+// __sized_by on struct member pointer in type attribute position
+//==============================================================================
+// TODO: Correctly parse sized_by as a type attribute. Currently it is parsed
+// as a declaration attribute
+
+struct on_member_pointer_complete_ty_ty_pos {
+ int size;
+ struct size_known *__sized_by(size) buf;
+};
+
+struct on_member_pointer_incomplete_ty_ty_pos {
+ int size;
+ struct size_unknown * __sized_by(size) buf;
+};
+
+struct on_member_pointer_const_incomplete_ty_ty_pos {
+ int size;
+ const struct size_unknown * __sized_by(size) buf;
+};
+
+struct on_member_pointer_void_ty_ty_pos {
+ int size;
+ void *__sized_by(size) buf;
+};
+
+// -
+
+struct on_member_pointer_fn_ptr_ty_pos {
+ int size;
+ // buffer of `size` function pointers is allowed
+ void (** __sized_by(size) fn_ptr)(void);
+};
+
+struct on_member_pointer_fn_ptr_ty_ptr_ty_pos {
+ int size;
+ // buffer of `size` function pointers is allowed
+ fn_ptr_ty* __sized_by(size) fn_ptr;
+};
+
+struct on_member_pointer_fn_ty_ty_pos {
+ int size;
+ void (* __sized_by(size) fn_ptr)(void);
+};
+
+struct on_member_pointer_fn_ptr_ty_ty_pos {
+ int size;
+ fn_ptr_ty __sized_by(size) fn_ptr;
+};
+
+// TODO: This should be forbidden but isn't due to sized_by being treated
+// as a declaration attribute.
+struct on_member_pointer_fn_ptr_ty_ty_pos_inner {
+ int size;
+ void (* __sized_by(size) * fn_ptr)(void);
+};
+
+struct on_member_pointer_struct_with_vla_ty_pos {
+ int size;
+ struct has_unannotated_vla *__sized_by(size) objects;
+};
+
+struct on_member_pointer_struct_with_annotated_vla_ty_pos {
+ int size;
+ struct has_annotated_vla* __sized_by(size) objects;
+};
+
+struct on_nested_pointer_inner {
+ // TODO: This should be disallowed because in the `-fbounds-safety` model
+ // `__sized_by` can only be nested when used in function parameters.
+ int size;
+ struct size_known *__sized_by(size) *buf;
+};
+
+struct on_nested_pointer_outer {
+ int size;
+ struct size_known **__sized_by(size) buf;
+};
+
+struct on_pointer_anon_buf_ty_pos {
+ int size;
+ struct {
+ struct size_known * __sized_by(size) buf;
+ };
+};
+
+struct on_pointer_anon_size_ty_pos {
+ struct {
+ int size;
+ };
+ struct size_known *__sized_by(size) buf;
+};
+
+//==============================================================================
+// __sized_by on struct non-pointer members
+//==============================================================================
+
+struct on_pod_ty {
+ int size;
+ // expected-error at +1{{'sized_by' only applies to pointers}}
+ int wrong_ty __sized_by(size);
+};
+
+struct on_void_ty {
+ int size;
+ // expected-error at +2{{'sized_by' only applies to pointers}}
+ // expected-error at +1{{field has incomplete type 'void'}}
+ void wrong_ty __sized_by(size);
+};
+
+struct on_member_array_complete_ty {
+ int size;
+ // expected-error at +1{{'sized_by' only applies to pointers}}
+ struct size_known array[] __sized_by(size);
+};
diff --git a/clang/test/Sema/attr-sized-by-vla-sizeless-types.c b/clang/test/Sema/attr-sized-by-vla-sizeless-types.c
new file mode 100644
index 0000000000000..835cf035f2e06
--- /dev/null
+++ b/clang/test/Sema/attr-sized-by-vla-sizeless-types.c
@@ -0,0 +1,11 @@
+// __SVInt8_t is specific to ARM64 so specify that in the target triple
+// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -verify %s
+
+#define __sized_by(f) __attribute__((sized_by(f)))
+
+struct on_sizeless_elt_ty {
+ int count;
+ // expected-error at +2{{'sized_by' only applies to pointers}}
+ // expected-error at +1{{array has sizeless element type '__SVInt8_t'}}
+ __SVInt8_t arr[] __sized_by(count);
+};
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