1 //=- NSAutoreleasePoolChecker.cpp --------------------------------*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a NSAutoreleasePoolChecker, a small checker that warns
11 // about subpar uses of NSAutoreleasePool. Note that while the check itself
12 // (in its current form) could be written as a flow-insensitive check, in
13 // can be potentially enhanced in the future with flow-sensitive information.
14 // It is also a good example of the CheckerVisitor interface.
16 //===----------------------------------------------------------------------===//
18 #include "ClangSACheckers.h"
19 #include "clang/AST/Decl.h"
20 #include "clang/AST/DeclObjC.h"
21 #include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
22 #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
23 #include "clang/StaticAnalyzer/Core/Checker.h"
24 #include "clang/StaticAnalyzer/Core/CheckerManager.h"
25 #include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
26 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
27 #include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
29 using namespace clang;
33 class NSAutoreleasePoolChecker
34 : public Checker<check::PreObjCMessage> {
35 mutable OwningPtr<BugType> BT;
36 mutable Selector releaseS;
39 void checkPreObjCMessage(const ObjCMethodCall &msg, CheckerContext &C) const;
42 } // end anonymous namespace
44 void NSAutoreleasePoolChecker::checkPreObjCMessage(const ObjCMethodCall &msg,
45 CheckerContext &C) const {
46 if (!msg.isInstanceMessage())
49 const ObjCInterfaceDecl *OD = msg.getReceiverInterface();
52 if (!OD->getIdentifier()->isStr("NSAutoreleasePool"))
55 if (releaseS.isNull())
56 releaseS = GetNullarySelector("release", C.getASTContext());
57 // Sending 'release' message?
58 if (msg.getSelector() != releaseS)
62 BT.reset(new BugType("Use -drain instead of -release",
63 "API Upgrade (Apple)"));
65 ExplodedNode *N = C.addTransition();
71 BugReport *Report = new BugReport(*BT, "Use -drain instead of -release when "
72 "using NSAutoreleasePool and garbage collection", N);
73 Report->addRange(msg.getSourceRange());
77 void ento::registerNSAutoreleasePoolChecker(CheckerManager &mgr) {
78 if (mgr.getLangOpts().getGC() != LangOptions::NonGC)
79 mgr.registerChecker<NSAutoreleasePoolChecker>();