76a21502fd
ClangCheckerRegistry is a very non-obvious, poorly documented, weird concept. It derives from CheckerRegistry, and is placed in lib/StaticAnalyzer/Frontend, whereas it's base is located in lib/StaticAnalyzer/Core. It was, from what I can imagine, used to circumvent the problem that the registry functions of the checkers are located in the clangStaticAnalyzerCheckers library, but that library depends on clangStaticAnalyzerCore. However, clangStaticAnalyzerFrontend depends on both of those libraries. One can make the observation however, that CheckerRegistry has no place in Core, it isn't used there at all! The only place where it is used is Frontend, which is where it ultimately belongs. This move implies that since include/clang/StaticAnalyzer/Checkers/ClangCheckers.h only contained a single function: class CheckerRegistry; void registerBuiltinCheckers(CheckerRegistry ®istry); it had to re purposed, as CheckerRegistry is no longer available to clangStaticAnalyzerCheckers. It was renamed to BuiltinCheckerRegistration.h, which actually describes it a lot better -- it does not contain the registration functions for checkers, but only those generated by the tblgen files. Differential Revision: https://reviews.llvm.org/D54436 llvm-svn: 349275
82 lines
2.9 KiB
C++
82 lines
2.9 KiB
C++
//==- ObjCPropertyChecker.cpp - Check ObjC properties ------------*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This checker finds issues with Objective-C properties.
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// Currently finds only one kind of issue:
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// - Find synthesized properties with copy attribute of mutable NS collection
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// types. Calling -copy on such collections produces an immutable copy,
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// which contradicts the type of the property.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
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#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
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#include "clang/StaticAnalyzer/Core/Checker.h"
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using namespace clang;
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using namespace ento;
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namespace {
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class ObjCPropertyChecker
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: public Checker<check::ASTDecl<ObjCPropertyDecl>> {
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void checkCopyMutable(const ObjCPropertyDecl *D, BugReporter &BR) const;
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public:
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void checkASTDecl(const ObjCPropertyDecl *D, AnalysisManager &Mgr,
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BugReporter &BR) const;
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};
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} // end anonymous namespace.
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void ObjCPropertyChecker::checkASTDecl(const ObjCPropertyDecl *D,
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AnalysisManager &Mgr,
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BugReporter &BR) const {
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checkCopyMutable(D, BR);
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}
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void ObjCPropertyChecker::checkCopyMutable(const ObjCPropertyDecl *D,
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BugReporter &BR) const {
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if (D->isReadOnly() || D->getSetterKind() != ObjCPropertyDecl::Copy)
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return;
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QualType T = D->getType();
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if (!T->isObjCObjectPointerType())
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return;
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const std::string &PropTypeName(T->getPointeeType().getCanonicalType()
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.getUnqualifiedType()
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.getAsString());
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if (!StringRef(PropTypeName).startswith("NSMutable"))
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return;
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const ObjCImplDecl *ImplD = nullptr;
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if (const ObjCInterfaceDecl *IntD =
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dyn_cast<ObjCInterfaceDecl>(D->getDeclContext())) {
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ImplD = IntD->getImplementation();
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} else if (auto *CatD = dyn_cast<ObjCCategoryDecl>(D->getDeclContext())) {
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ImplD = CatD->getClassInterface()->getImplementation();
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}
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if (!ImplD || ImplD->HasUserDeclaredSetterMethod(D))
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return;
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SmallString<128> Str;
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llvm::raw_svector_ostream OS(Str);
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OS << "Property of mutable type '" << PropTypeName
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<< "' has 'copy' attribute; an immutable object will be stored instead";
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BR.EmitBasicReport(
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D, this, "Objective-C property misuse", "Logic error", OS.str(),
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PathDiagnosticLocation::createBegin(D, BR.getSourceManager()),
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D->getSourceRange());
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}
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void ento::registerObjCPropertyChecker(CheckerManager &Mgr) {
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Mgr.registerChecker<ObjCPropertyChecker>();
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}
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