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-rw-r--r--include/clang/AST/Attr.h10
-rw-r--r--lib/Sema/Sema.h8
-rw-r--r--lib/Sema/SemaChecking.cpp92
-rw-r--r--lib/Sema/SemaExpr.cpp15
-rw-r--r--lib/Sema/SemaOverload.cpp10
5 files changed, 83 insertions, 52 deletions
diff --git a/include/clang/AST/Attr.h b/include/clang/AST/Attr.h
index 2f4fa228e5..685a90b4fa 100644
--- a/include/clang/AST/Attr.h
+++ b/include/clang/AST/Attr.h
@@ -14,6 +14,9 @@
#ifndef LLVM_CLANG_AST_ATTR_H
#define LLVM_CLANG_AST_ATTR_H
+#include "llvm/Support/Casting.h"
+using llvm::dyn_cast;
+
#include <cassert>
#include <cstring>
#include <string>
@@ -121,6 +124,13 @@ public:
const Attr *getNext() const { return Next; }
void setNext(Attr *next) { Next = next; }
+ template<typename T> const T *getNext() const {
+ for (const Attr *attr = getNext(); attr; attr = attr->getNext())
+ if (const T *V = dyn_cast<T>(attr))
+ return V;
+ return 0;
+ }
+
bool isInherited() const { return Inherited; }
void setInherited(bool value) { Inherited = value; }
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index fab6bcf604..d17e2f1498 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -3336,14 +3336,16 @@ public:
//===--------------------------------------------------------------------===//
// Extra semantic analysis beyond the C type system
private:
- Action::OwningExprResult CheckFunctionCall(FunctionDecl *FDecl,
- CallExpr *TheCall);
+ bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall);
+ bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall);
- Action::OwningExprResult CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall);
SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL,
unsigned ByteNo) const;
bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall);
bool CheckObjCString(Expr *Arg);
+
+ Action::OwningExprResult CheckBuiltinFunctionCall(unsigned BuiltinID,
+ CallExpr *TheCall);
bool SemaBuiltinVAStart(CallExpr *TheCall);
bool SemaBuiltinUnorderedCompare(CallExpr *TheCall);
bool SemaBuiltinStackAddress(CallExpr *TheCall);
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index ffe4abd731..612c4dc4cb 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -100,31 +100,22 @@ bool Sema::CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall) {
return false;
}
-/// CheckFunctionCall - Check a direct function call for various correctness
-/// and safety properties not strictly enforced by the C type system.
Action::OwningExprResult
-Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall) {
+Sema::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
OwningExprResult TheCallResult(Owned(TheCall));
- // Get the IdentifierInfo* for the called function.
- IdentifierInfo *FnInfo = FDecl->getIdentifier();
-
- // None of the checks below are needed for functions that don't have
- // simple names (e.g., C++ conversion functions).
- if (!FnInfo)
- return move(TheCallResult);
- switch (FDecl->getBuiltinID(Context)) {
+ switch (BuiltinID) {
case Builtin::BI__builtin___CFStringMakeConstantString:
assert(TheCall->getNumArgs() == 1 &&
"Wrong # arguments to builtin CFStringMakeConstantString");
if (CheckObjCString(TheCall->getArg(0)))
return ExprError();
- return move(TheCallResult);
+ break;
case Builtin::BI__builtin_stdarg_start:
case Builtin::BI__builtin_va_start:
if (SemaBuiltinVAStart(TheCall))
return ExprError();
- return move(TheCallResult);
+ break;
case Builtin::BI__builtin_isgreater:
case Builtin::BI__builtin_isgreaterequal:
case Builtin::BI__builtin_isless:
@@ -133,12 +124,12 @@ Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall) {
case Builtin::BI__builtin_isunordered:
if (SemaBuiltinUnorderedCompare(TheCall))
return ExprError();
- return move(TheCallResult);
+ break;
case Builtin::BI__builtin_return_address:
case Builtin::BI__builtin_frame_address:
if (SemaBuiltinStackAddress(TheCall))
return ExprError();
- return move(TheCallResult);
+ break;
case Builtin::BI__builtin_shufflevector:
return SemaBuiltinShuffleVector(TheCall);
// TheCall will be freed by the smart pointer here, but that's fine, since
@@ -146,15 +137,15 @@ Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall) {
case Builtin::BI__builtin_prefetch:
if (SemaBuiltinPrefetch(TheCall))
return ExprError();
- return move(TheCallResult);
+ break;
case Builtin::BI__builtin_object_size:
if (SemaBuiltinObjectSize(TheCall))
return ExprError();
- return move(TheCallResult);
+ break;
case Builtin::BI__builtin_longjmp:
if (SemaBuiltinLongjmp(TheCall))
return ExprError();
- return move(TheCallResult);
+ break;
case Builtin::BI__sync_fetch_and_add:
case Builtin::BI__sync_fetch_and_sub:
case Builtin::BI__sync_fetch_and_or:
@@ -173,9 +164,23 @@ Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall) {
case Builtin::BI__sync_lock_release:
if (SemaBuiltinAtomicOverloaded(TheCall))
return ExprError();
- return move(TheCallResult);
+ break;
}
+
+ return move(TheCallResult);
+}
+/// CheckFunctionCall - Check a direct function call for various correctness
+/// and safety properties not strictly enforced by the C type system.
+bool Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall) {
+ // Get the IdentifierInfo* for the called function.
+ IdentifierInfo *FnInfo = FDecl->getIdentifier();
+
+ // None of the checks below are needed for functions that don't have
+ // simple names (e.g., C++ conversion functions).
+ if (!FnInfo)
+ return false;
+
// FIXME: This mechanism should be abstracted to be less fragile and
// more efficient. For example, just map function ids to custom
// handlers.
@@ -193,41 +198,42 @@ Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall) {
HasVAListArg ? 0 : Format->getFirstArg() - 1);
}
}
- for (const Attr *attr = FDecl->getAttrs();
- attr; attr = attr->getNext()) {
- if (const NonNullAttr *NonNull = dyn_cast<NonNullAttr>(attr))
- CheckNonNullArguments(NonNull, TheCall);
- }
+
+ for (const NonNullAttr *NonNull = FDecl->getAttr<NonNullAttr>(); NonNull;
+ NonNull = NonNull->getNext<NonNullAttr>())
+ CheckNonNullArguments(NonNull, TheCall);
- return move(TheCallResult);
+ return false;
}
-Action::OwningExprResult
-Sema::CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall) {
-
- OwningExprResult TheCallResult(Owned(TheCall));
+bool Sema::CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall) {
// Printf checking.
const FormatAttr *Format = NDecl->getAttr<FormatAttr>();
if (!Format)
- return move(TheCallResult);
+ return false;
+
const VarDecl *V = dyn_cast<VarDecl>(NDecl);
if (!V)
- return move(TheCallResult);
+ return false;
+
QualType Ty = V->getType();
if (!Ty->isBlockPointerType())
- return move(TheCallResult);
- if (CheckablePrintfAttr(Format, TheCall)) {
- bool HasVAListArg = Format->getFirstArg() == 0;
- if (!HasVAListArg) {
- const FunctionType *FT =
- Ty->getAs<BlockPointerType>()->getPointeeType()->getAsFunctionType();
- if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT))
- HasVAListArg = !Proto->isVariadic();
- }
- CheckPrintfArguments(TheCall, HasVAListArg, Format->getFormatIdx() - 1,
- HasVAListArg ? 0 : Format->getFirstArg() - 1);
+ return false;
+
+ if (!CheckablePrintfAttr(Format, TheCall))
+ return false;
+
+ bool HasVAListArg = Format->getFirstArg() == 0;
+ if (!HasVAListArg) {
+ const FunctionType *FT =
+ Ty->getAs<BlockPointerType>()->getPointeeType()->getAsFunctionType();
+ if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT))
+ HasVAListArg = !Proto->isVariadic();
}
- return move(TheCallResult);
+ CheckPrintfArguments(TheCall, HasVAListArg, Format->getFormatIdx() - 1,
+ HasVAListArg ? 0 : Format->getFirstArg() - 1);
+
+ return false;
}
/// SemaBuiltinAtomicOverloaded - We have a call to a function like
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 1a519ffc1b..5f1467c733 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -2929,11 +2929,18 @@ Sema::ActOnCallExpr(Scope *S, ExprArg fn, SourceLocation LParenLoc,
// Check for sentinels
if (NDecl)
DiagnoseSentinelCalls(NDecl, LParenLoc, Args, NumArgs);
+
// Do special checking on direct calls to functions.
- if (FDecl)
- return CheckFunctionCall(FDecl, TheCall.take());
- if (NDecl)
- return CheckBlockCall(NDecl, TheCall.take());
+ if (FDecl) {
+ if (CheckFunctionCall(FDecl, TheCall.get()))
+ return ExprError();
+
+ if (unsigned BuiltinID = FDecl->getBuiltinID(Context))
+ return CheckBuiltinFunctionCall(BuiltinID, TheCall.take());
+ } else if (NDecl) {
+ if (CheckBlockCall(NDecl, TheCall.get()))
+ return ExprError();
+ }
return Owned(TheCall.take());
}
diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index faf4d82a8b..d45e54a4a5 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -4343,7 +4343,10 @@ Sema::BuildCallToMemberFunction(Scope *S, Expr *MemExprE,
RParenLoc))
return true;
- return CheckFunctionCall(Method, TheCall.take()).release();
+ if (CheckFunctionCall(Method, TheCall.get()))
+ return true;
+
+ return TheCall.release();
}
/// BuildCallToObjectOfClassType - Build a call to an object of class
@@ -4549,7 +4552,10 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Object,
if (IsError) return true;
- return CheckFunctionCall(Method, TheCall.take()).release();
+ if (CheckFunctionCall(Method, TheCall.get()))
+ return true;
+
+ return TheCall.release();
}
/// BuildOverloadedArrowExpr - Build a call to an overloaded @c operator->
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-07-01 15:58:12 +0000