================ @@ -0,0 +1,324 @@ +//===- StdVariantChecker.cpp -------------------------------------*- C++ -*-==// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "clang/AST/Type.h" +#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h" +#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" +#include "clang/StaticAnalyzer/Core/Checker.h" +#include "clang/StaticAnalyzer/Core/CheckerManager.h" +#include "clang/StaticAnalyzer/Core/PathSensitive/CallDescription.h" +#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" +#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" +#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h" +#include "llvm/ADT/FoldingSet.h" +#include "llvm/ADT/StringRef.h" +#include "llvm/Support/Casting.h" +#include <optional> +#include <string_view> + +#include "TaggedUnionModeling.h" + +using namespace clang; +using namespace ento; +using namespace tagged_union_modeling; + +REGISTER_MAP_WITH_PROGRAMSTATE(VariantHeldTypeMap, const MemRegion *, QualType) + +namespace clang { +namespace ento { +namespace tagged_union_modeling { + +// Returns the CallEvent representing the caller of the function +// It is needed because the CallEvent class does not contain enough information +// to tell who called it. Checker context is needed. +CallEventRef<> getCaller(const CallEvent &Call, const ProgramStateRef &State) { + const auto *CallLocationContext = Call.getLocationContext(); + if (!CallLocationContext || CallLocationContext->inTopFrame()) + return nullptr; + + const auto *CallStackFrameContext = CallLocationContext->getStackFrame(); + if (!CallStackFrameContext) + return nullptr; + + CallEventManager &CEMgr = State->getStateManager().getCallEventManager(); + return CEMgr.getCaller(CallStackFrameContext, State); +} + +const CXXConstructorDecl * +getConstructorDeclarationForCall(const CallEvent &Call) { + const auto *ConstructorCall = dyn_cast<CXXConstructorCall>(&Call); + if (!ConstructorCall) + return nullptr; + + return ConstructorCall->getDecl(); +} + +bool isCopyConstructorCall(const CallEvent &Call) { + if (const CXXConstructorDecl *ConstructorDecl = + getConstructorDeclarationForCall(Call)) + return ConstructorDecl->isCopyConstructor(); + return false; +} + +bool isCopyAssignmentCall(const CallEvent &Call) { + const Decl *CopyAssignmentDecl = Call.getDecl(); + + if (const auto *AsMethodDecl = + dyn_cast_or_null<CXXMethodDecl>(CopyAssignmentDecl)) + return AsMethodDecl->isCopyAssignmentOperator(); + return false; +} + +bool isMoveConstructorCall(const CallEvent &Call) { + const CXXConstructorDecl *ConstructorDecl = + getConstructorDeclarationForCall(Call); + if (!ConstructorDecl) + return false; + + return ConstructorDecl->isMoveConstructor(); +} + +bool isMoveAssignmentCall(const CallEvent &Call) { + const Decl *CopyAssignmentDecl = Call.getDecl(); + + const auto *AsMethodDecl = + dyn_cast_or_null<CXXMethodDecl>(CopyAssignmentDecl); + if (!AsMethodDecl) + return false; + + return AsMethodDecl->isMoveAssignmentOperator(); +} + +bool isStdType(const Type *Type, llvm::StringRef TypeName) { + auto *Decl = Type->getAsRecordDecl(); + if (!Decl) + return false; + return (Decl->getName() == TypeName) && Decl->isInStdNamespace(); +} + +bool isStdVariant(const Type *Type) { + return isStdType(Type, llvm::StringRef("variant")); ---------------- DonatNagyE wrote:
I don't think that you need to call the constructor `llvm::StringRef` explicitly. Also note that there is a subclass of `StringRef` called `llvm::StringLiteral` which calculates the length of a string literal in compile time (it's used as the type of `constexpr` variables) -- perhaps you'd want to use that. https://github.com/llvm/llvm-project/pull/66481 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits