https://github.com/sookach updated
https://github.com/llvm/llvm-project/pull/112111
>From 64bde2ed7a39d5e270a7d1daca3a30a2cde6e0db Mon Sep 17 00:00:00 2001
From: Andrew Sukach <andrewsuk...@gmail.com>
Date: Sat, 12 Oct 2024 19:47:30 -0400
Subject: [PATCH] [clang] Check for null TypeSourceInfo in
Sema::CreateUnaryExprOrTypeTraitExpr
---
clang/docs/ReleaseNotes.rst | 2 ++
clang/lib/Sema/SemaExpr.cpp | 3 +++
.../unary-expr-or-type-trait-invalid.cpp | 26 +++++++++++++++++++
3 files changed, 31 insertions(+)
create mode 100644 clang/test/SemaCXX/unary-expr-or-type-trait-invalid.cpp
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 763bc3ac159322..f2f6988a1f5c13 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -505,6 +505,8 @@ Bug Fixes to C++ Support
- Fix a crash when parsing a pseudo destructor involving an invalid type.
(#GH111460)
- Fixed an assertion failure when invoking recovery call expressions with
explicit attributes
and undeclared templates. (#GH107047, #GH49093)
+- Fixed a compiler crash that occurred when processing malformed code
involving `sizeof` with
+ an invalid type argument. (#GH111594)
Bug Fixes to AST Handling
^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index 4e37385710af5e..b0bd216c5dc101 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -4629,6 +4629,9 @@ ExprResult
Sema::CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo,
TInfo->getType()->isVariablyModifiedType())
TInfo = TransformToPotentiallyEvaluated(TInfo);
+ if (!TInfo)
+ return ExprError();
+
// C99 6.5.3.4p4: the type (an unsigned integer type) is size_t.
return new (Context) UnaryExprOrTypeTraitExpr(
ExprKind, TInfo, Context.getSizeType(), OpLoc, R.getEnd());
diff --git a/clang/test/SemaCXX/unary-expr-or-type-trait-invalid.cpp
b/clang/test/SemaCXX/unary-expr-or-type-trait-invalid.cpp
new file mode 100644
index 00000000000000..b2b959be8d31ff
--- /dev/null
+++ b/clang/test/SemaCXX/unary-expr-or-type-trait-invalid.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wno-unused-value %s
+
+a() {struct b c (sizeof(b * [({ {tree->d* next)} 0
+
+// expected-error@3 {{a type specifier is required for all declarations}}
+// expected-error@3 {{use of undeclared identifier 'tree'; did you mean
'true'?}}
+// expected-error@3 {{member reference type 'bool' is not a pointer}}
+// expected-error@3 {{expected ';' after expression}}
+// expected-error@3 {{use of undeclared identifier 'next'; did you mean
'new'?}}
+// expected-error@3 {{expected expression}}
+// expected-error@3 {{expected ';' after expression}}
+// expected-error@26 {{expected '}'}}
+// expected-note@3 {{to match this '{'}}
+// expected-error@26 {{expected ')'}}
+// expected-note@3 {{to match this '('}}
+// expected-error@26 {{expected ']'}}
+// expected-note@3 {{to match this '['}}
+// expected-error@26 {{expected ')'}}
+// expected-note@3 {{to match this '('}}
+// expected-error@3 {{using declaration 'exp' instantiates to an empty pack}}
+// expected-error@3 {{variable has incomplete type 'struct b'}}
+// expected-note@3 {{forward declaration of 'b'}}
+// expected-error@3 {{expected ';' at end of declaration}}
+// expected-error@26 {{expected '}'}}
+// expected-note@3 {{to match this '{'}}
+
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