1218887Sdim//=- NSAutoreleasePoolChecker.cpp --------------------------------*- C++ -*-==// 2218887Sdim// 3218887Sdim// The LLVM Compiler Infrastructure 4218887Sdim// 5218887Sdim// This file is distributed under the University of Illinois Open Source 6218887Sdim// License. See LICENSE.TXT for details. 7218887Sdim// 8218887Sdim//===----------------------------------------------------------------------===// 9218887Sdim// 10218887Sdim// This file defines a NSAutoreleasePoolChecker, a small checker that warns 11218887Sdim// about subpar uses of NSAutoreleasePool. Note that while the check itself 12226633Sdim// (in its current form) could be written as a flow-insensitive check, in 13218887Sdim// can be potentially enhanced in the future with flow-sensitive information. 14218887Sdim// It is also a good example of the CheckerVisitor interface. 15218887Sdim// 16218887Sdim//===----------------------------------------------------------------------===// 17218887Sdim 18218887Sdim#include "ClangSACheckers.h" 19249423Sdim#include "clang/AST/Decl.h" 20249423Sdim#include "clang/AST/DeclObjC.h" 21249423Sdim#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h" 22249423Sdim#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" 23221345Sdim#include "clang/StaticAnalyzer/Core/Checker.h" 24218887Sdim#include "clang/StaticAnalyzer/Core/CheckerManager.h" 25239462Sdim#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" 26219077Sdim#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" 27218887Sdim#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 28218887Sdim 29218887Sdimusing namespace clang; 30218887Sdimusing namespace ento; 31218887Sdim 32218887Sdimnamespace { 33218887Sdimclass NSAutoreleasePoolChecker 34221345Sdim : public Checker<check::PreObjCMessage> { 35234353Sdim mutable OwningPtr<BugType> BT; 36219077Sdim mutable Selector releaseS; 37218887Sdim 38218887Sdimpublic: 39239462Sdim void checkPreObjCMessage(const ObjCMethodCall &msg, CheckerContext &C) const; 40218887Sdim}; 41218887Sdim 42218887Sdim} // end anonymous namespace 43218887Sdim 44239462Sdimvoid NSAutoreleasePoolChecker::checkPreObjCMessage(const ObjCMethodCall &msg, 45219077Sdim CheckerContext &C) const { 46239462Sdim if (!msg.isInstanceMessage()) 47218887Sdim return; 48239462Sdim 49239462Sdim const ObjCInterfaceDecl *OD = msg.getReceiverInterface(); 50218887Sdim if (!OD) 51218887Sdim return; 52239462Sdim if (!OD->getIdentifier()->isStr("NSAutoreleasePool")) 53218887Sdim return; 54219077Sdim 55219077Sdim if (releaseS.isNull()) 56219077Sdim releaseS = GetNullarySelector("release", C.getASTContext()); 57218887Sdim // Sending 'release' message? 58218887Sdim if (msg.getSelector() != releaseS) 59218887Sdim return; 60234353Sdim 61234353Sdim if (!BT) 62234353Sdim BT.reset(new BugType("Use -drain instead of -release", 63234353Sdim "API Upgrade (Apple)")); 64234353Sdim 65234353Sdim ExplodedNode *N = C.addTransition(); 66234353Sdim if (!N) { 67234353Sdim assert(0); 68234353Sdim return; 69234353Sdim } 70234353Sdim 71234353Sdim BugReport *Report = new BugReport(*BT, "Use -drain instead of -release when " 72234353Sdim "using NSAutoreleasePool and garbage collection", N); 73234353Sdim Report->addRange(msg.getSourceRange()); 74243830Sdim C.emitReport(Report); 75218887Sdim} 76219077Sdim 77219077Sdimvoid ento::registerNSAutoreleasePoolChecker(CheckerManager &mgr) { 78234353Sdim if (mgr.getLangOpts().getGC() != LangOptions::NonGC) 79219077Sdim mgr.registerChecker<NSAutoreleasePoolChecker>(); 80219077Sdim} 81