Chris Lattner | be1a7a0 | 2008-03-15 23:59:48 +0000 | [diff] [blame] | 1 | // CFRefCount.cpp - Transfer functions for tracking simple values -*- C++ -*--// |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
Gabor Greif | 2224fcb | 2008-03-06 10:40:09 +0000 | [diff] [blame] | 10 | // This file defines the methods for CFRefCount, which implements |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 11 | // a reference count checker for Core Foundation (Mac OS X). |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 15 | #include "GRSimpleVals.h" |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 16 | #include "clang/Basic/LangOptions.h" |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 17 | #include "clang/Basic/SourceManager.h" |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 18 | #include "clang/Analysis/PathSensitive/ValueState.h" |
Ted Kremenek | dd0126b | 2008-03-31 18:26:32 +0000 | [diff] [blame] | 19 | #include "clang/Analysis/PathDiagnostic.h" |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 20 | #include "clang/Analysis/LocalCheckers.h" |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 21 | #include "clang/Analysis/PathDiagnostic.h" |
| 22 | #include "clang/Analysis/PathSensitive/BugReporter.h" |
Daniel Dunbar | 64789f8 | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 23 | #include "clang/AST/DeclObjC.h" |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 24 | #include "llvm/ADT/DenseMap.h" |
| 25 | #include "llvm/ADT/FoldingSet.h" |
| 26 | #include "llvm/ADT/ImmutableMap.h" |
Ted Kremenek | 2ac4ba6 | 2008-05-07 18:36:45 +0000 | [diff] [blame] | 27 | #include "llvm/ADT/StringExtras.h" |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 28 | #include "llvm/Support/Compiler.h" |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 29 | #include "llvm/ADT/STLExtras.h" |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 30 | #include <ostream> |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 31 | #include <sstream> |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 32 | |
| 33 | using namespace clang; |
Ted Kremenek | 2ac4ba6 | 2008-05-07 18:36:45 +0000 | [diff] [blame] | 34 | using llvm::CStrInCStrNoCase; |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 35 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 36 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 37 | // Selector creation functions. |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 38 | //===----------------------------------------------------------------------===// |
| 39 | |
Ted Kremenek | 1bd6ddb | 2008-05-01 18:31:44 +0000 | [diff] [blame] | 40 | static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 41 | IdentifierInfo* II = &Ctx.Idents.get(name); |
| 42 | return Ctx.Selectors.getSelector(0, &II); |
| 43 | } |
| 44 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 45 | static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { |
| 46 | IdentifierInfo* II = &Ctx.Idents.get(name); |
| 47 | return Ctx.Selectors.getSelector(1, &II); |
| 48 | } |
| 49 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 50 | //===----------------------------------------------------------------------===// |
| 51 | // Type querying functions. |
| 52 | //===----------------------------------------------------------------------===// |
| 53 | |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 54 | static bool isCFRefType(QualType T) { |
| 55 | |
| 56 | if (!T->isPointerType()) |
| 57 | return false; |
| 58 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 59 | // Check the typedef for the name "CF" and the substring "Ref". |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 60 | TypedefType* TD = dyn_cast<TypedefType>(T.getTypePtr()); |
| 61 | |
| 62 | if (!TD) |
| 63 | return false; |
| 64 | |
| 65 | const char* TDName = TD->getDecl()->getIdentifier()->getName(); |
| 66 | assert (TDName); |
| 67 | |
| 68 | if (TDName[0] != 'C' || TDName[1] != 'F') |
| 69 | return false; |
| 70 | |
| 71 | if (strstr(TDName, "Ref") == 0) |
| 72 | return false; |
| 73 | |
| 74 | return true; |
| 75 | } |
| 76 | |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 77 | static bool isCGRefType(QualType T) { |
| 78 | |
| 79 | if (!T->isPointerType()) |
| 80 | return false; |
| 81 | |
| 82 | // Check the typedef for the name "CG" and the substring "Ref". |
| 83 | TypedefType* TD = dyn_cast<TypedefType>(T.getTypePtr()); |
| 84 | |
| 85 | if (!TD) |
| 86 | return false; |
| 87 | |
| 88 | const char* TDName = TD->getDecl()->getIdentifier()->getName(); |
| 89 | assert (TDName); |
| 90 | |
| 91 | if (TDName[0] != 'C' || TDName[1] != 'G') |
| 92 | return false; |
| 93 | |
| 94 | if (strstr(TDName, "Ref") == 0) |
| 95 | return false; |
| 96 | |
| 97 | return true; |
| 98 | } |
| 99 | |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 100 | static bool isNSType(QualType T) { |
| 101 | |
| 102 | if (!T->isPointerType()) |
| 103 | return false; |
| 104 | |
| 105 | ObjCInterfaceType* OT = dyn_cast<ObjCInterfaceType>(T.getTypePtr()); |
| 106 | |
| 107 | if (!OT) |
| 108 | return false; |
| 109 | |
| 110 | const char* ClsName = OT->getDecl()->getIdentifier()->getName(); |
| 111 | assert (ClsName); |
| 112 | |
| 113 | if (ClsName[0] != 'N' || ClsName[1] != 'S') |
| 114 | return false; |
| 115 | |
| 116 | return true; |
| 117 | } |
| 118 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 119 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 120 | // Primitives used for constructing summaries for function/method calls. |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 121 | //===----------------------------------------------------------------------===// |
| 122 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 123 | namespace { |
| 124 | /// ArgEffect is used to summarize a function/method call's effect on a |
| 125 | /// particular argument. |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 126 | enum ArgEffect { IncRef, DecRef, DoNothing, DoNothingByRef, |
| 127 | StopTracking, MayEscape, SelfOwn, Autorelease }; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 128 | |
| 129 | /// ArgEffects summarizes the effects of a function/method call on all of |
| 130 | /// its arguments. |
| 131 | typedef std::vector<std::pair<unsigned,ArgEffect> > ArgEffects; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 132 | } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 133 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 134 | namespace llvm { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 135 | template <> struct FoldingSetTrait<ArgEffects> { |
| 136 | static void Profile(const ArgEffects& X, FoldingSetNodeID& ID) { |
| 137 | for (ArgEffects::const_iterator I = X.begin(), E = X.end(); I!= E; ++I) { |
| 138 | ID.AddInteger(I->first); |
| 139 | ID.AddInteger((unsigned) I->second); |
| 140 | } |
| 141 | } |
| 142 | }; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 143 | } // end llvm namespace |
| 144 | |
| 145 | namespace { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 146 | |
| 147 | /// RetEffect is used to summarize a function/method call's behavior with |
| 148 | /// respect to its return value. |
| 149 | class VISIBILITY_HIDDEN RetEffect { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 150 | public: |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 151 | enum Kind { NoRet, Alias, OwnedSymbol, OwnedAllocatedSymbol, |
| 152 | NotOwnedSymbol, ReceiverAlias }; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 153 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 154 | private: |
| 155 | unsigned Data; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 156 | RetEffect(Kind k, unsigned D = 0) { Data = (D << 3) | (unsigned) k; } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 157 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 158 | public: |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 159 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 160 | Kind getKind() const { return (Kind) (Data & 0x7); } |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 161 | |
| 162 | unsigned getIndex() const { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 163 | assert(getKind() == Alias); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 164 | return Data >> 3; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 165 | } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 166 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 167 | static RetEffect MakeAlias(unsigned Idx) { |
| 168 | return RetEffect(Alias, Idx); |
| 169 | } |
| 170 | static RetEffect MakeReceiverAlias() { |
| 171 | return RetEffect(ReceiverAlias); |
| 172 | } |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 173 | static RetEffect MakeOwned(bool isAllocated = false) { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 174 | return RetEffect(isAllocated ? OwnedAllocatedSymbol : OwnedSymbol); |
| 175 | } |
| 176 | static RetEffect MakeNotOwned() { |
| 177 | return RetEffect(NotOwnedSymbol); |
| 178 | } |
| 179 | static RetEffect MakeNoRet() { |
| 180 | return RetEffect(NoRet); |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 181 | } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 182 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 183 | operator Kind() const { |
| 184 | return getKind(); |
| 185 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 186 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 187 | void Profile(llvm::FoldingSetNodeID& ID) const { |
| 188 | ID.AddInteger(Data); |
| 189 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 190 | }; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 191 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 192 | |
| 193 | class VISIBILITY_HIDDEN RetainSummary : public llvm::FoldingSetNode { |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 194 | /// Args - an ordered vector of (index, ArgEffect) pairs, where index |
| 195 | /// specifies the argument (starting from 0). This can be sparsely |
| 196 | /// populated; arguments with no entry in Args use 'DefaultArgEffect'. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 197 | ArgEffects* Args; |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 198 | |
| 199 | /// DefaultArgEffect - The default ArgEffect to apply to arguments that |
| 200 | /// do not have an entry in Args. |
| 201 | ArgEffect DefaultArgEffect; |
| 202 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 203 | /// Receiver - If this summary applies to an Objective-C message expression, |
| 204 | /// this is the effect applied to the state of the receiver. |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 205 | ArgEffect Receiver; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 206 | |
| 207 | /// Ret - The effect on the return value. Used to indicate if the |
| 208 | /// function/method call returns a new tracked symbol, returns an |
| 209 | /// alias of one of the arguments in the call, and so on. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 210 | RetEffect Ret; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 211 | |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 212 | /// EndPath - Indicates that execution of this method/function should |
| 213 | /// terminate the simulation of a path. |
| 214 | bool EndPath; |
| 215 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 216 | public: |
| 217 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 218 | RetainSummary(ArgEffects* A, RetEffect R, ArgEffect defaultEff, |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 219 | ArgEffect ReceiverEff, bool endpath = false) |
| 220 | : Args(A), DefaultArgEffect(defaultEff), Receiver(ReceiverEff), Ret(R), |
| 221 | EndPath(endpath) {} |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 222 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 223 | /// getArg - Return the argument effect on the argument specified by |
| 224 | /// idx (starting from 0). |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 225 | ArgEffect getArg(unsigned idx) const { |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 226 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 227 | if (!Args) |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 228 | return DefaultArgEffect; |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 229 | |
| 230 | // If Args is present, it is likely to contain only 1 element. |
| 231 | // Just do a linear search. Do it from the back because functions with |
| 232 | // large numbers of arguments will be tail heavy with respect to which |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 233 | // argument they actually modify with respect to the reference count. |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 234 | for (ArgEffects::reverse_iterator I=Args->rbegin(), E=Args->rend(); |
| 235 | I!=E; ++I) { |
| 236 | |
| 237 | if (idx > I->first) |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 238 | return DefaultArgEffect; |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 239 | |
| 240 | if (idx == I->first) |
| 241 | return I->second; |
| 242 | } |
| 243 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 244 | return DefaultArgEffect; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 245 | } |
| 246 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 247 | /// getRetEffect - Returns the effect on the return value of the call. |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 248 | RetEffect getRetEffect() const { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 249 | return Ret; |
| 250 | } |
| 251 | |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 252 | /// isEndPath - Returns true if executing the given method/function should |
| 253 | /// terminate the path. |
| 254 | bool isEndPath() const { return EndPath; } |
| 255 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 256 | /// getReceiverEffect - Returns the effect on the receiver of the call. |
| 257 | /// This is only meaningful if the summary applies to an ObjCMessageExpr*. |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 258 | ArgEffect getReceiverEffect() const { |
| 259 | return Receiver; |
| 260 | } |
| 261 | |
Ted Kremenek | 2719e98 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 262 | typedef ArgEffects::const_iterator ExprIterator; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 263 | |
Ted Kremenek | 2719e98 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 264 | ExprIterator begin_args() const { return Args->begin(); } |
| 265 | ExprIterator end_args() const { return Args->end(); } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 266 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 267 | static void Profile(llvm::FoldingSetNodeID& ID, ArgEffects* A, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 268 | RetEffect RetEff, ArgEffect DefaultEff, |
Ted Kremenek | 6fbecac | 2008-07-18 17:39:56 +0000 | [diff] [blame] | 269 | ArgEffect ReceiverEff, bool EndPath) { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 270 | ID.AddPointer(A); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 271 | ID.Add(RetEff); |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 272 | ID.AddInteger((unsigned) DefaultEff); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 273 | ID.AddInteger((unsigned) ReceiverEff); |
Ted Kremenek | 6fbecac | 2008-07-18 17:39:56 +0000 | [diff] [blame] | 274 | ID.AddInteger((unsigned) EndPath); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | void Profile(llvm::FoldingSetNodeID& ID) const { |
Ted Kremenek | 6fbecac | 2008-07-18 17:39:56 +0000 | [diff] [blame] | 278 | Profile(ID, Args, Ret, DefaultArgEffect, Receiver, EndPath); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 279 | } |
| 280 | }; |
Ted Kremenek | 84f010c | 2008-06-23 23:30:29 +0000 | [diff] [blame] | 281 | } // end anonymous namespace |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 282 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 283 | //===----------------------------------------------------------------------===// |
| 284 | // Data structures for constructing summaries. |
| 285 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 9f0fc79 | 2008-06-24 03:49:48 +0000 | [diff] [blame] | 286 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 287 | namespace { |
| 288 | class VISIBILITY_HIDDEN ObjCSummaryKey { |
| 289 | IdentifierInfo* II; |
| 290 | Selector S; |
| 291 | public: |
| 292 | ObjCSummaryKey(IdentifierInfo* ii, Selector s) |
| 293 | : II(ii), S(s) {} |
| 294 | |
| 295 | ObjCSummaryKey(ObjCInterfaceDecl* d, Selector s) |
| 296 | : II(d ? d->getIdentifier() : 0), S(s) {} |
| 297 | |
| 298 | ObjCSummaryKey(Selector s) |
| 299 | : II(0), S(s) {} |
| 300 | |
| 301 | IdentifierInfo* getIdentifier() const { return II; } |
| 302 | Selector getSelector() const { return S; } |
| 303 | }; |
Ted Kremenek | 84f010c | 2008-06-23 23:30:29 +0000 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | namespace llvm { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 307 | template <> struct DenseMapInfo<ObjCSummaryKey> { |
| 308 | static inline ObjCSummaryKey getEmptyKey() { |
| 309 | return ObjCSummaryKey(DenseMapInfo<IdentifierInfo*>::getEmptyKey(), |
| 310 | DenseMapInfo<Selector>::getEmptyKey()); |
| 311 | } |
Ted Kremenek | 84f010c | 2008-06-23 23:30:29 +0000 | [diff] [blame] | 312 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 313 | static inline ObjCSummaryKey getTombstoneKey() { |
| 314 | return ObjCSummaryKey(DenseMapInfo<IdentifierInfo*>::getTombstoneKey(), |
| 315 | DenseMapInfo<Selector>::getTombstoneKey()); |
| 316 | } |
| 317 | |
| 318 | static unsigned getHashValue(const ObjCSummaryKey &V) { |
| 319 | return (DenseMapInfo<IdentifierInfo*>::getHashValue(V.getIdentifier()) |
| 320 | & 0x88888888) |
| 321 | | (DenseMapInfo<Selector>::getHashValue(V.getSelector()) |
| 322 | & 0x55555555); |
| 323 | } |
| 324 | |
| 325 | static bool isEqual(const ObjCSummaryKey& LHS, const ObjCSummaryKey& RHS) { |
| 326 | return DenseMapInfo<IdentifierInfo*>::isEqual(LHS.getIdentifier(), |
| 327 | RHS.getIdentifier()) && |
| 328 | DenseMapInfo<Selector>::isEqual(LHS.getSelector(), |
| 329 | RHS.getSelector()); |
| 330 | } |
| 331 | |
| 332 | static bool isPod() { |
| 333 | return DenseMapInfo<ObjCInterfaceDecl*>::isPod() && |
| 334 | DenseMapInfo<Selector>::isPod(); |
| 335 | } |
| 336 | }; |
Ted Kremenek | 84f010c | 2008-06-23 23:30:29 +0000 | [diff] [blame] | 337 | } // end llvm namespace |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 338 | |
Ted Kremenek | 84f010c | 2008-06-23 23:30:29 +0000 | [diff] [blame] | 339 | namespace { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 340 | class VISIBILITY_HIDDEN ObjCSummaryCache { |
| 341 | typedef llvm::DenseMap<ObjCSummaryKey, RetainSummary*> MapTy; |
| 342 | MapTy M; |
| 343 | public: |
| 344 | ObjCSummaryCache() {} |
| 345 | |
| 346 | typedef MapTy::iterator iterator; |
| 347 | |
| 348 | iterator find(ObjCInterfaceDecl* D, Selector S) { |
| 349 | |
| 350 | // Do a lookup with the (D,S) pair. If we find a match return |
| 351 | // the iterator. |
| 352 | ObjCSummaryKey K(D, S); |
| 353 | MapTy::iterator I = M.find(K); |
| 354 | |
| 355 | if (I != M.end() || !D) |
| 356 | return I; |
| 357 | |
| 358 | // Walk the super chain. If we find a hit with a parent, we'll end |
| 359 | // up returning that summary. We actually allow that key (null,S), as |
| 360 | // we cache summaries for the null ObjCInterfaceDecl* to allow us to |
| 361 | // generate initial summaries without having to worry about NSObject |
| 362 | // being declared. |
| 363 | // FIXME: We may change this at some point. |
| 364 | for (ObjCInterfaceDecl* C=D->getSuperClass() ;; C=C->getSuperClass()) { |
| 365 | if ((I = M.find(ObjCSummaryKey(C, S))) != M.end()) |
| 366 | break; |
| 367 | |
| 368 | if (!C) |
| 369 | return I; |
| 370 | } |
| 371 | |
| 372 | // Cache the summary with original key to make the next lookup faster |
| 373 | // and return the iterator. |
| 374 | M[K] = I->second; |
| 375 | return I; |
| 376 | } |
| 377 | |
| 378 | |
| 379 | iterator find(Expr* Receiver, Selector S) { |
| 380 | return find(getReceiverDecl(Receiver), S); |
| 381 | } |
| 382 | |
| 383 | iterator find(IdentifierInfo* II, Selector S) { |
| 384 | // FIXME: Class method lookup. Right now we dont' have a good way |
| 385 | // of going between IdentifierInfo* and the class hierarchy. |
| 386 | iterator I = M.find(ObjCSummaryKey(II, S)); |
| 387 | return I == M.end() ? M.find(ObjCSummaryKey(S)) : I; |
| 388 | } |
| 389 | |
| 390 | ObjCInterfaceDecl* getReceiverDecl(Expr* E) { |
| 391 | |
| 392 | const PointerType* PT = E->getType()->getAsPointerType(); |
| 393 | if (!PT) return 0; |
| 394 | |
| 395 | ObjCInterfaceType* OI = dyn_cast<ObjCInterfaceType>(PT->getPointeeType()); |
| 396 | if (!OI) return 0; |
| 397 | |
| 398 | return OI ? OI->getDecl() : 0; |
| 399 | } |
| 400 | |
| 401 | iterator end() { return M.end(); } |
| 402 | |
| 403 | RetainSummary*& operator[](ObjCMessageExpr* ME) { |
| 404 | |
| 405 | Selector S = ME->getSelector(); |
| 406 | |
| 407 | if (Expr* Receiver = ME->getReceiver()) { |
| 408 | ObjCInterfaceDecl* OD = getReceiverDecl(Receiver); |
| 409 | return OD ? M[ObjCSummaryKey(OD->getIdentifier(), S)] : M[S]; |
| 410 | } |
| 411 | |
| 412 | return M[ObjCSummaryKey(ME->getClassName(), S)]; |
| 413 | } |
| 414 | |
| 415 | RetainSummary*& operator[](ObjCSummaryKey K) { |
| 416 | return M[K]; |
| 417 | } |
| 418 | |
| 419 | RetainSummary*& operator[](Selector S) { |
| 420 | return M[ ObjCSummaryKey(S) ]; |
| 421 | } |
| 422 | }; |
| 423 | } // end anonymous namespace |
| 424 | |
| 425 | //===----------------------------------------------------------------------===// |
| 426 | // Data structures for managing collections of summaries. |
| 427 | //===----------------------------------------------------------------------===// |
| 428 | |
| 429 | namespace { |
| 430 | class VISIBILITY_HIDDEN RetainSummaryManager { |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 431 | |
| 432 | //==-----------------------------------------------------------------==// |
| 433 | // Typedefs. |
| 434 | //==-----------------------------------------------------------------==// |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 435 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 436 | typedef llvm::FoldingSet<llvm::FoldingSetNodeWrapper<ArgEffects> > |
| 437 | ArgEffectsSetTy; |
| 438 | |
| 439 | typedef llvm::FoldingSet<RetainSummary> |
| 440 | SummarySetTy; |
| 441 | |
| 442 | typedef llvm::DenseMap<FunctionDecl*, RetainSummary*> |
| 443 | FuncSummariesTy; |
| 444 | |
Ted Kremenek | 84f010c | 2008-06-23 23:30:29 +0000 | [diff] [blame] | 445 | typedef ObjCSummaryCache ObjCMethodSummariesTy; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 446 | |
| 447 | //==-----------------------------------------------------------------==// |
| 448 | // Data. |
| 449 | //==-----------------------------------------------------------------==// |
| 450 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 451 | /// Ctx - The ASTContext object for the analyzed ASTs. |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 452 | ASTContext& Ctx; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 453 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 454 | /// NSWindowII - An IdentifierInfo* representing the identifier "NSWindow." |
| 455 | IdentifierInfo* NSWindowII; |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 456 | |
| 457 | /// NSPanelII - An IdentifierInfo* representing the identifier "NSPanel." |
| 458 | IdentifierInfo* NSPanelII; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 459 | |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 460 | /// NSAssertionHandlerII - An IdentifierInfo* representing the identifier |
| 461 | // "NSAssertionHandler". |
| 462 | IdentifierInfo* NSAssertionHandlerII; |
| 463 | |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 464 | /// CFDictionaryCreateII - An IdentifierInfo* representing the indentifier |
| 465 | /// "CFDictionaryCreate". |
| 466 | IdentifierInfo* CFDictionaryCreateII; |
| 467 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 468 | /// GCEnabled - Records whether or not the analyzed code runs in GC mode. |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 469 | const bool GCEnabled; |
| 470 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 471 | /// SummarySet - A FoldingSet of uniqued summaries. |
Ted Kremenek | a4c7429 | 2008-04-10 22:58:08 +0000 | [diff] [blame] | 472 | SummarySetTy SummarySet; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 473 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 474 | /// FuncSummaries - A map from FunctionDecls to summaries. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 475 | FuncSummariesTy FuncSummaries; |
| 476 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 477 | /// ObjCClassMethodSummaries - A map from selectors (for instance methods) |
| 478 | /// to summaries. |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 479 | ObjCMethodSummariesTy ObjCClassMethodSummaries; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 480 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 481 | /// ObjCMethodSummaries - A map from selectors to summaries. |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 482 | ObjCMethodSummariesTy ObjCMethodSummaries; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 483 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 484 | /// ArgEffectsSet - A FoldingSet of uniqued ArgEffects. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 485 | ArgEffectsSetTy ArgEffectsSet; |
| 486 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 487 | /// BPAlloc - A BumpPtrAllocator used for allocating summaries, ArgEffects, |
| 488 | /// and all other data used by the checker. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 489 | llvm::BumpPtrAllocator BPAlloc; |
| 490 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 491 | /// ScratchArgs - A holding buffer for construct ArgEffects. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 492 | ArgEffects ScratchArgs; |
| 493 | |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame] | 494 | RetainSummary* StopSummary; |
| 495 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 496 | //==-----------------------------------------------------------------==// |
| 497 | // Methods. |
| 498 | //==-----------------------------------------------------------------==// |
| 499 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 500 | /// getArgEffects - Returns a persistent ArgEffects object based on the |
| 501 | /// data in ScratchArgs. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 502 | ArgEffects* getArgEffects(); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 503 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 504 | enum UnaryFuncKind { cfretain, cfrelease, cfmakecollectable }; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 505 | RetainSummary* getUnarySummary(FunctionDecl* FD, UnaryFuncKind func); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 506 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 507 | RetainSummary* getNSSummary(FunctionDecl* FD, const char* FName); |
| 508 | RetainSummary* getCFSummary(FunctionDecl* FD, const char* FName); |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 509 | RetainSummary* getCGSummary(FunctionDecl* FD, const char* FName); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 510 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 511 | RetainSummary* getCFSummaryCreateRule(FunctionDecl* FD); |
| 512 | RetainSummary* getCFSummaryGetRule(FunctionDecl* FD); |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 513 | RetainSummary* getCFCreateGetRuleSummary(FunctionDecl* FD, const char* FName); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 514 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 515 | RetainSummary* getPersistentSummary(ArgEffects* AE, RetEffect RetEff, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 516 | ArgEffect ReceiverEff = DoNothing, |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 517 | ArgEffect DefaultEff = MayEscape, |
| 518 | bool isEndPath = false); |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 519 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 520 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 521 | RetainSummary* getPersistentSummary(RetEffect RE, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 522 | ArgEffect ReceiverEff = DoNothing, |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 523 | ArgEffect DefaultEff = MayEscape) { |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 524 | return getPersistentSummary(getArgEffects(), RE, ReceiverEff, DefaultEff); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 525 | } |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 526 | |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame] | 527 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 528 | RetainSummary* getPersistentStopSummary() { |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame] | 529 | if (StopSummary) |
| 530 | return StopSummary; |
| 531 | |
| 532 | StopSummary = getPersistentSummary(RetEffect::MakeNoRet(), |
| 533 | StopTracking, StopTracking); |
| 534 | |
| 535 | return StopSummary; |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 536 | } |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 537 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 538 | RetainSummary* getInitMethodSummary(ObjCMessageExpr* ME); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 539 | |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 540 | void InitializeClassMethodSummaries(); |
| 541 | void InitializeMethodSummaries(); |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 542 | |
| 543 | void addClsMethSummary(IdentifierInfo* ClsII, Selector S, |
| 544 | RetainSummary* Summ) { |
| 545 | ObjCClassMethodSummaries[ObjCSummaryKey(ClsII, S)] = Summ; |
| 546 | } |
| 547 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 548 | void addNSObjectClsMethSummary(Selector S, RetainSummary *Summ) { |
| 549 | ObjCClassMethodSummaries[S] = Summ; |
| 550 | } |
| 551 | |
| 552 | void addNSObjectMethSummary(Selector S, RetainSummary *Summ) { |
| 553 | ObjCMethodSummaries[S] = Summ; |
| 554 | } |
| 555 | |
| 556 | void addNSWindowMethSummary(Selector S, RetainSummary *Summ) { |
| 557 | ObjCMethodSummaries[ObjCSummaryKey(NSWindowII, S)] = Summ; |
| 558 | } |
| 559 | |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 560 | void addNSPanelMethSummary(Selector S, RetainSummary *Summ) { |
| 561 | ObjCMethodSummaries[ObjCSummaryKey(NSPanelII, S)] = Summ; |
| 562 | } |
| 563 | |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 564 | void addPanicSummary(IdentifierInfo* ClsII, Selector S) { |
| 565 | RetainSummary* Summ = getPersistentSummary(0, RetEffect::MakeNoRet(), |
| 566 | DoNothing, DoNothing, true); |
| 567 | |
| 568 | ObjCMethodSummaries[ObjCSummaryKey(ClsII, S)] = Summ; |
| 569 | } |
| 570 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 571 | public: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 572 | |
| 573 | RetainSummaryManager(ASTContext& ctx, bool gcenabled) |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 574 | : Ctx(ctx), |
| 575 | NSWindowII(&ctx.Idents.get("NSWindow")), |
| 576 | NSPanelII(&ctx.Idents.get("NSPanel")), |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 577 | NSAssertionHandlerII(&ctx.Idents.get("NSAssertionHandler")), |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 578 | CFDictionaryCreateII(&ctx.Idents.get("CFDictionaryCreate")), |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 579 | GCEnabled(gcenabled), StopSummary(0) { |
| 580 | |
| 581 | InitializeClassMethodSummaries(); |
| 582 | InitializeMethodSummaries(); |
| 583 | } |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 584 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 585 | ~RetainSummaryManager(); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 586 | |
Ted Kremenek | d13c187 | 2008-06-24 03:56:45 +0000 | [diff] [blame] | 587 | RetainSummary* getSummary(FunctionDecl* FD); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 588 | RetainSummary* getMethodSummary(ObjCMessageExpr* ME, ObjCInterfaceDecl* ID); |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 589 | RetainSummary* getClassMethodSummary(IdentifierInfo* ClsName, Selector S); |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 590 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 591 | bool isGCEnabled() const { return GCEnabled; } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 592 | }; |
| 593 | |
| 594 | } // end anonymous namespace |
| 595 | |
| 596 | //===----------------------------------------------------------------------===// |
| 597 | // Implementation of checker data structures. |
| 598 | //===----------------------------------------------------------------------===// |
| 599 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 600 | RetainSummaryManager::~RetainSummaryManager() { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 601 | |
| 602 | // FIXME: The ArgEffects could eventually be allocated from BPAlloc, |
| 603 | // mitigating the need to do explicit cleanup of the |
| 604 | // Argument-Effect summaries. |
| 605 | |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 606 | for (ArgEffectsSetTy::iterator I = ArgEffectsSet.begin(), |
| 607 | E = ArgEffectsSet.end(); I!=E; ++I) |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 608 | I->getValue().~ArgEffects(); |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 609 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 610 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 611 | ArgEffects* RetainSummaryManager::getArgEffects() { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 612 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 613 | if (ScratchArgs.empty()) |
| 614 | return NULL; |
| 615 | |
| 616 | // Compute a profile for a non-empty ScratchArgs. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 617 | llvm::FoldingSetNodeID profile; |
| 618 | profile.Add(ScratchArgs); |
| 619 | void* InsertPos; |
| 620 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 621 | // Look up the uniqued copy, or create a new one. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 622 | llvm::FoldingSetNodeWrapper<ArgEffects>* E = |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 623 | ArgEffectsSet.FindNodeOrInsertPos(profile, InsertPos); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 624 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 625 | if (E) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 626 | ScratchArgs.clear(); |
| 627 | return &E->getValue(); |
| 628 | } |
| 629 | |
| 630 | E = (llvm::FoldingSetNodeWrapper<ArgEffects>*) |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 631 | BPAlloc.Allocate<llvm::FoldingSetNodeWrapper<ArgEffects> >(); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 632 | |
| 633 | new (E) llvm::FoldingSetNodeWrapper<ArgEffects>(ScratchArgs); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 634 | ArgEffectsSet.InsertNode(E, InsertPos); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 635 | |
| 636 | ScratchArgs.clear(); |
| 637 | return &E->getValue(); |
| 638 | } |
| 639 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 640 | RetainSummary* |
| 641 | RetainSummaryManager::getPersistentSummary(ArgEffects* AE, RetEffect RetEff, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 642 | ArgEffect ReceiverEff, |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 643 | ArgEffect DefaultEff, |
| 644 | bool isEndPath) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 645 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 646 | // Generate a profile for the summary. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 647 | llvm::FoldingSetNodeID profile; |
Ted Kremenek | 6fbecac | 2008-07-18 17:39:56 +0000 | [diff] [blame] | 648 | RetainSummary::Profile(profile, AE, RetEff, DefaultEff, ReceiverEff, |
| 649 | isEndPath); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 650 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 651 | // Look up the uniqued summary, or create one if it doesn't exist. |
| 652 | void* InsertPos; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 653 | RetainSummary* Summ = SummarySet.FindNodeOrInsertPos(profile, InsertPos); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 654 | |
| 655 | if (Summ) |
| 656 | return Summ; |
| 657 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 658 | // Create the summary and return it. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 659 | Summ = (RetainSummary*) BPAlloc.Allocate<RetainSummary>(); |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 660 | new (Summ) RetainSummary(AE, RetEff, DefaultEff, ReceiverEff, isEndPath); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 661 | SummarySet.InsertNode(Summ, InsertPos); |
| 662 | |
| 663 | return Summ; |
| 664 | } |
| 665 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 666 | //===----------------------------------------------------------------------===// |
| 667 | // Summary creation for functions (largely uses of Core Foundation). |
| 668 | //===----------------------------------------------------------------------===// |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 669 | |
Ted Kremenek | d13c187 | 2008-06-24 03:56:45 +0000 | [diff] [blame] | 670 | RetainSummary* RetainSummaryManager::getSummary(FunctionDecl* FD) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 671 | |
| 672 | SourceLocation Loc = FD->getLocation(); |
| 673 | |
| 674 | if (!Loc.isFileID()) |
| 675 | return NULL; |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 676 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 677 | // Look up a summary in our cache of FunctionDecls -> Summaries. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 678 | FuncSummariesTy::iterator I = FuncSummaries.find(FD); |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 679 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 680 | if (I != FuncSummaries.end()) |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 681 | return I->second; |
| 682 | |
| 683 | // No summary. Generate one. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 684 | const char* FName = FD->getIdentifier()->getName(); |
| 685 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 686 | RetainSummary *S = 0; |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 687 | |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 688 | FunctionType* FT = dyn_cast<FunctionType>(FD->getType()); |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 689 | |
| 690 | do { |
| 691 | if (FT) { |
| 692 | |
| 693 | QualType T = FT->getResultType(); |
| 694 | |
| 695 | if (isCFRefType(T)) { |
| 696 | S = getCFSummary(FD, FName); |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | if (isCGRefType(T)) { |
| 701 | S = getCGSummary(FD, FName ); |
| 702 | break; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | if (FName[0] == 'C' && FName[1] == 'F') |
| 707 | S = getCFSummary(FD, FName); |
| 708 | else if (FName[0] == 'N' && FName[1] == 'S') |
| 709 | S = getNSSummary(FD, FName); |
| 710 | } |
| 711 | while (0); |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 712 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 713 | FuncSummaries[FD] = S; |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 714 | return S; |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 715 | } |
| 716 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 717 | RetainSummary* RetainSummaryManager::getNSSummary(FunctionDecl* FD, |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 718 | const char* FName) { |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 719 | FName += 2; |
| 720 | |
| 721 | if (strcmp(FName, "MakeCollectable") == 0) |
| 722 | return getUnarySummary(FD, cfmakecollectable); |
| 723 | |
| 724 | return 0; |
| 725 | } |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 726 | |
| 727 | static bool isRetain(FunctionDecl* FD, const char* FName) { |
Ted Kremenek | a48ea85 | 2008-07-15 17:43:41 +0000 | [diff] [blame] | 728 | const char* loc = strstr(FName, "Retain"); |
| 729 | return loc && loc[sizeof("Retain")-1] == '\0'; |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 730 | } |
| 731 | |
| 732 | static bool isRelease(FunctionDecl* FD, const char* FName) { |
Ted Kremenek | a48ea85 | 2008-07-15 17:43:41 +0000 | [diff] [blame] | 733 | const char* loc = strstr(FName, "Release"); |
| 734 | return loc && loc[sizeof("Release")-1] == '\0'; |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 735 | } |
| 736 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 737 | RetainSummary* RetainSummaryManager::getCFSummary(FunctionDecl* FD, |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 738 | const char* FName) { |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 739 | |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 740 | if (FName[0] == 'C' && FName[1] == 'F') |
| 741 | FName += 2; |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 742 | |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 743 | if (isRetain(FD, FName)) |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 744 | return getUnarySummary(FD, cfretain); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 745 | |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 746 | if (isRelease(FD, FName)) |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 747 | return getUnarySummary(FD, cfrelease); |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 748 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 749 | if (strcmp(FName, "MakeCollectable") == 0) |
| 750 | return getUnarySummary(FD, cfmakecollectable); |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 751 | |
| 752 | return getCFCreateGetRuleSummary(FD, FName); |
| 753 | } |
| 754 | |
| 755 | RetainSummary* RetainSummaryManager::getCGSummary(FunctionDecl* FD, |
| 756 | const char* FName) { |
| 757 | |
| 758 | if (FName[0] == 'C' && FName[1] == 'G') |
| 759 | FName += 2; |
| 760 | |
| 761 | if (isRelease(FD, FName)) |
| 762 | return getUnarySummary(FD, cfrelease); |
| 763 | |
| 764 | if (isRetain(FD, FName)) |
| 765 | return getUnarySummary(FD, cfretain); |
| 766 | |
| 767 | return getCFCreateGetRuleSummary(FD, FName); |
| 768 | } |
| 769 | |
| 770 | RetainSummary* |
| 771 | RetainSummaryManager::getCFCreateGetRuleSummary(FunctionDecl* FD, |
| 772 | const char* FName) { |
| 773 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 774 | if (strstr(FName, "Create") || strstr(FName, "Copy")) |
| 775 | return getCFSummaryCreateRule(FD); |
Ted Kremenek | 4c5378c | 2008-07-15 16:50:12 +0000 | [diff] [blame] | 776 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 777 | if (strstr(FName, "Get")) |
| 778 | return getCFSummaryGetRule(FD); |
| 779 | |
| 780 | return 0; |
| 781 | } |
| 782 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 783 | RetainSummary* |
| 784 | RetainSummaryManager::getUnarySummary(FunctionDecl* FD, UnaryFuncKind func) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 785 | |
| 786 | FunctionTypeProto* FT = |
| 787 | dyn_cast<FunctionTypeProto>(FD->getType().getTypePtr()); |
| 788 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 789 | if (FT) { |
| 790 | |
| 791 | if (FT->getNumArgs() != 1) |
| 792 | return 0; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 793 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 794 | TypedefType* ArgT = dyn_cast<TypedefType>(FT->getArgType(0).getTypePtr()); |
| 795 | |
| 796 | if (!ArgT) |
| 797 | return 0; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 798 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 799 | if (!ArgT->isPointerType()) |
| 800 | return NULL; |
| 801 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 802 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 803 | assert (ScratchArgs.empty()); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 804 | |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 805 | switch (func) { |
| 806 | case cfretain: { |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 807 | ScratchArgs.push_back(std::make_pair(0, IncRef)); |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 808 | return getPersistentSummary(RetEffect::MakeAlias(0), |
| 809 | DoNothing, DoNothing); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | case cfrelease: { |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 813 | ScratchArgs.push_back(std::make_pair(0, DecRef)); |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 814 | return getPersistentSummary(RetEffect::MakeNoRet(), |
| 815 | DoNothing, DoNothing); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 816 | } |
| 817 | |
| 818 | case cfmakecollectable: { |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 819 | if (GCEnabled) |
| 820 | ScratchArgs.push_back(std::make_pair(0, DecRef)); |
| 821 | |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 822 | return getPersistentSummary(RetEffect::MakeAlias(0), |
| 823 | DoNothing, DoNothing); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 824 | } |
| 825 | |
| 826 | default: |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 827 | assert (false && "Not a supported unary function."); |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 828 | } |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 829 | } |
| 830 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 831 | RetainSummary* RetainSummaryManager::getCFSummaryCreateRule(FunctionDecl* FD) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 832 | |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 833 | FunctionType* FT = |
| 834 | dyn_cast<FunctionType>(FD->getType().getTypePtr()); |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 835 | |
| 836 | if (FT && !isCFRefType(FT->getResultType())) |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 837 | return getPersistentSummary(RetEffect::MakeNoRet()); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 838 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 839 | assert (ScratchArgs.empty()); |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 840 | |
| 841 | if (FD->getIdentifier() == CFDictionaryCreateII) { |
| 842 | ScratchArgs.push_back(std::make_pair(1, DoNothingByRef)); |
| 843 | ScratchArgs.push_back(std::make_pair(2, DoNothingByRef)); |
| 844 | } |
| 845 | |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 846 | return getPersistentSummary(RetEffect::MakeOwned(true)); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 847 | } |
| 848 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 849 | RetainSummary* RetainSummaryManager::getCFSummaryGetRule(FunctionDecl* FD) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 850 | |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 851 | FunctionType* FT = |
| 852 | dyn_cast<FunctionType>(FD->getType().getTypePtr()); |
Ted Kremenek | d4244d4 | 2008-04-11 20:11:19 +0000 | [diff] [blame] | 853 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 854 | if (FT) { |
| 855 | QualType RetTy = FT->getResultType(); |
Ted Kremenek | d4244d4 | 2008-04-11 20:11:19 +0000 | [diff] [blame] | 856 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 857 | // FIXME: For now we assume that all pointer types returned are referenced |
| 858 | // counted. Since this is the "Get" rule, we assume non-ownership, which |
| 859 | // works fine for things that are not reference counted. We do this because |
| 860 | // some generic data structures return "void*". We need something better |
| 861 | // in the future. |
| 862 | |
| 863 | if (!isCFRefType(RetTy) && !RetTy->isPointerType()) |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 864 | return getPersistentSummary(RetEffect::MakeNoRet(), DoNothing, DoNothing); |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 865 | } |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 866 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 867 | // FIXME: Add special-cases for functions that retain/release. For now |
| 868 | // just handle the default case. |
| 869 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 870 | assert (ScratchArgs.empty()); |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 871 | return getPersistentSummary(RetEffect::MakeNotOwned(), DoNothing, DoNothing); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 872 | } |
| 873 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 874 | //===----------------------------------------------------------------------===// |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 875 | // Summary creation for Selectors. |
| 876 | //===----------------------------------------------------------------------===// |
| 877 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 878 | RetainSummary* |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 879 | RetainSummaryManager::getInitMethodSummary(ObjCMessageExpr* ME) { |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 880 | assert(ScratchArgs.empty()); |
| 881 | |
| 882 | RetainSummary* Summ = |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 883 | getPersistentSummary(RetEffect::MakeReceiverAlias()); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 884 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 885 | ObjCMethodSummaries[ME] = Summ; |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 886 | return Summ; |
| 887 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 888 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 889 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 890 | RetainSummary* |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 891 | RetainSummaryManager::getMethodSummary(ObjCMessageExpr* ME, |
| 892 | ObjCInterfaceDecl* ID) { |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 893 | |
| 894 | Selector S = ME->getSelector(); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 895 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 896 | // Look up a summary in our summary cache. |
| 897 | ObjCMethodSummariesTy::iterator I = ObjCMethodSummaries.find(ID, S); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 898 | |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 899 | if (I != ObjCMethodSummaries.end()) |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 900 | return I->second; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 901 | |
Ted Kremenek | 48b6d9e | 2008-05-07 03:45:05 +0000 | [diff] [blame] | 902 | if (!ME->getType()->isPointerType()) |
| 903 | return 0; |
| 904 | |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 905 | // "initXXX": pass-through for receiver. |
| 906 | |
| 907 | const char* s = S.getIdentifierInfoForSlot(0)->getName(); |
Ted Kremenek | 48b6d9e | 2008-05-07 03:45:05 +0000 | [diff] [blame] | 908 | assert (ScratchArgs.empty()); |
Ted Kremenek | 1d3d956 | 2008-05-06 06:09:09 +0000 | [diff] [blame] | 909 | |
Ted Kremenek | 988c447 | 2008-06-02 17:14:13 +0000 | [diff] [blame] | 910 | if (strncmp(s, "init", 4) == 0 || strncmp(s, "_init", 5) == 0) |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 911 | return getInitMethodSummary(ME); |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 912 | |
Ted Kremenek | 48b6d9e | 2008-05-07 03:45:05 +0000 | [diff] [blame] | 913 | // "copyXXX", "createXXX", "newXXX": allocators. |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 914 | |
Ted Kremenek | 5496f6d | 2008-05-07 04:25:59 +0000 | [diff] [blame] | 915 | if (!isNSType(ME->getReceiver()->getType())) |
| 916 | return 0; |
| 917 | |
Ted Kremenek | 62820d8 | 2008-05-07 20:06:41 +0000 | [diff] [blame] | 918 | if (CStrInCStrNoCase(s, "create") || CStrInCStrNoCase(s, "copy") || |
| 919 | CStrInCStrNoCase(s, "new")) { |
Ted Kremenek | 48b6d9e | 2008-05-07 03:45:05 +0000 | [diff] [blame] | 920 | |
| 921 | RetEffect E = isGCEnabled() ? RetEffect::MakeNoRet() |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 922 | : RetEffect::MakeOwned(true); |
Ted Kremenek | 48b6d9e | 2008-05-07 03:45:05 +0000 | [diff] [blame] | 923 | |
| 924 | RetainSummary* Summ = getPersistentSummary(E); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 925 | ObjCMethodSummaries[ME] = Summ; |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 926 | return Summ; |
| 927 | } |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 928 | |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 929 | return 0; |
| 930 | } |
| 931 | |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 932 | RetainSummary* |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 933 | RetainSummaryManager::getClassMethodSummary(IdentifierInfo* ClsName, |
| 934 | Selector S) { |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 935 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 936 | // FIXME: Eventually we should properly do class method summaries, but |
| 937 | // it requires us being able to walk the type hierarchy. Unfortunately, |
| 938 | // we cannot do this with just an IdentifierInfo* for the class name. |
| 939 | |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 940 | // Look up a summary in our cache of Selectors -> Summaries. |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 941 | ObjCMethodSummariesTy::iterator I = ObjCClassMethodSummaries.find(ClsName, S); |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 942 | |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 943 | if (I != ObjCClassMethodSummaries.end()) |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 944 | return I->second; |
| 945 | |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 946 | return 0; |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 947 | } |
| 948 | |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 949 | void RetainSummaryManager::InitializeClassMethodSummaries() { |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 950 | |
| 951 | assert (ScratchArgs.empty()); |
| 952 | |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 953 | RetEffect E = isGCEnabled() ? RetEffect::MakeNoRet() |
| 954 | : RetEffect::MakeOwned(true); |
| 955 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 956 | RetainSummary* Summ = getPersistentSummary(E); |
| 957 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 958 | // Create the summaries for "alloc", "new", and "allocWithZone:" for |
| 959 | // NSObject and its derivatives. |
| 960 | addNSObjectClsMethSummary(GetNullarySelector("alloc", Ctx), Summ); |
| 961 | addNSObjectClsMethSummary(GetNullarySelector("new", Ctx), Summ); |
| 962 | addNSObjectClsMethSummary(GetUnarySelector("allocWithZone", Ctx), Summ); |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 963 | |
| 964 | // Create the [NSAssertionHandler currentHander] summary. |
| 965 | addClsMethSummary(NSAssertionHandlerII, |
Ted Kremenek | 1ebce74 | 2008-07-18 18:14:26 +0000 | [diff] [blame] | 966 | GetNullarySelector("currentHandler", Ctx), |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 967 | getPersistentSummary(RetEffect::MakeNotOwned())); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 968 | } |
| 969 | |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 970 | void RetainSummaryManager::InitializeMethodSummaries() { |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 971 | |
| 972 | assert (ScratchArgs.empty()); |
| 973 | |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 974 | // Create the "init" selector. It just acts as a pass-through for the |
| 975 | // receiver. |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 976 | RetainSummary* InitSumm = getPersistentSummary(RetEffect::MakeReceiverAlias()); |
| 977 | addNSObjectMethSummary(GetNullarySelector("init", Ctx), InitSumm); |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 978 | |
| 979 | // The next methods are allocators. |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 980 | RetEffect E = isGCEnabled() ? RetEffect::MakeNoRet() |
| 981 | : RetEffect::MakeOwned(true); |
| 982 | |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 983 | RetainSummary* Summ = getPersistentSummary(E); |
Ted Kremenek | a7722b7 | 2008-05-06 21:26:51 +0000 | [diff] [blame] | 984 | |
| 985 | // Create the "copy" selector. |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 986 | addNSObjectMethSummary(GetNullarySelector("copy", Ctx), Summ); |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 987 | |
| 988 | // Create the "mutableCopy" selector. |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 989 | addNSObjectMethSummary(GetNullarySelector("mutableCopy", Ctx), Summ); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 990 | |
| 991 | // Create the "retain" selector. |
| 992 | E = RetEffect::MakeReceiverAlias(); |
| 993 | Summ = getPersistentSummary(E, isGCEnabled() ? DoNothing : IncRef); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 994 | addNSObjectMethSummary(GetNullarySelector("retain", Ctx), Summ); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 995 | |
| 996 | // Create the "release" selector. |
| 997 | Summ = getPersistentSummary(E, isGCEnabled() ? DoNothing : DecRef); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 998 | addNSObjectMethSummary(GetNullarySelector("release", Ctx), Summ); |
Ted Kremenek | c00b32b | 2008-05-07 21:17:39 +0000 | [diff] [blame] | 999 | |
| 1000 | // Create the "drain" selector. |
| 1001 | Summ = getPersistentSummary(E, isGCEnabled() ? DoNothing : DecRef); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1002 | addNSObjectMethSummary(GetNullarySelector("drain", Ctx), Summ); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 1003 | |
| 1004 | // Create the "autorelease" selector. |
Ted Kremenek | e5a4bb0 | 2008-06-30 16:57:41 +0000 | [diff] [blame] | 1005 | Summ = getPersistentSummary(E, isGCEnabled() ? DoNothing : Autorelease); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1006 | addNSObjectMethSummary(GetNullarySelector("autorelease", Ctx), Summ); |
| 1007 | |
| 1008 | // For NSWindow, allocated objects are (initially) self-owned. |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 1009 | // For NSPanel (which subclasses NSWindow), allocated objects are not |
| 1010 | // self-owned. |
| 1011 | |
| 1012 | RetainSummary *NSWindowSumm = |
| 1013 | getPersistentSummary(RetEffect::MakeReceiverAlias(), SelfOwn); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1014 | |
| 1015 | // Create the "initWithContentRect:styleMask:backing:defer:" selector. |
Ted Kremenek | 6fbecac | 2008-07-18 17:39:56 +0000 | [diff] [blame] | 1016 | llvm::SmallVector<IdentifierInfo*, 10> II; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1017 | II.push_back(&Ctx.Idents.get("initWithContentRect")); |
| 1018 | II.push_back(&Ctx.Idents.get("styleMask")); |
| 1019 | II.push_back(&Ctx.Idents.get("backing")); |
| 1020 | II.push_back(&Ctx.Idents.get("defer")); |
| 1021 | Selector S = Ctx.Selectors.getSelector(II.size(), &II[0]); |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 1022 | addNSWindowMethSummary(S, NSWindowSumm); |
| 1023 | addNSPanelMethSummary(S, InitSumm); |
| 1024 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1025 | // Create the "initWithContentRect:styleMask:backing:defer:screen:" selector. |
| 1026 | II.push_back(&Ctx.Idents.get("screen")); |
| 1027 | S = Ctx.Selectors.getSelector(II.size(), &II[0]); |
Ted Kremenek | e44927e | 2008-07-01 17:21:27 +0000 | [diff] [blame] | 1028 | addNSWindowMethSummary(S, NSWindowSumm); |
| 1029 | addNSPanelMethSummary(S, InitSumm); |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 1030 | |
| 1031 | // Create NSAssertionHandler summaries. |
| 1032 | II.clear(); |
| 1033 | II.push_back(&Ctx.Idents.get("handleFailureInFunction")); |
| 1034 | II.push_back(&Ctx.Idents.get("file")); |
| 1035 | II.push_back(&Ctx.Idents.get("lineNumber")); |
| 1036 | II.push_back(&Ctx.Idents.get("description")); |
| 1037 | S = Ctx.Selectors.getSelector(II.size(), &II[0]); |
| 1038 | addPanicSummary(NSAssertionHandlerII, S); |
| 1039 | |
| 1040 | II.clear(); |
| 1041 | II.push_back(&Ctx.Idents.get("handleFailureInMethod")); |
Ted Kremenek | 65259c9 | 2008-07-24 18:47:16 +0000 | [diff] [blame] | 1042 | II.push_back(&Ctx.Idents.get("object")); |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 1043 | II.push_back(&Ctx.Idents.get("file")); |
| 1044 | II.push_back(&Ctx.Idents.get("lineNumber")); |
| 1045 | II.push_back(&Ctx.Idents.get("description")); |
| 1046 | S = Ctx.Selectors.getSelector(II.size(), &II[0]); |
| 1047 | addPanicSummary(NSAssertionHandlerII, S); |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 1048 | } |
| 1049 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1050 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1051 | // Reference-counting logic (typestate + counts). |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1052 | //===----------------------------------------------------------------------===// |
| 1053 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1054 | namespace { |
| 1055 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1056 | class VISIBILITY_HIDDEN RefVal { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1057 | public: |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1058 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1059 | enum Kind { |
| 1060 | Owned = 0, // Owning reference. |
| 1061 | NotOwned, // Reference is not owned by still valid (not freed). |
| 1062 | Released, // Object has been released. |
| 1063 | ReturnedOwned, // Returned object passes ownership to caller. |
| 1064 | ReturnedNotOwned, // Return object does not pass ownership to caller. |
| 1065 | ErrorUseAfterRelease, // Object used after released. |
| 1066 | ErrorReleaseNotOwned, // Release of an object that was not owned. |
| 1067 | ErrorLeak // A memory leak due to excessive reference counts. |
| 1068 | }; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1069 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1070 | private: |
| 1071 | |
| 1072 | Kind kind; |
| 1073 | unsigned Cnt; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1074 | QualType T; |
| 1075 | |
| 1076 | RefVal(Kind k, unsigned cnt, QualType t) : kind(k), Cnt(cnt), T(t) {} |
| 1077 | RefVal(Kind k, unsigned cnt = 0) : kind(k), Cnt(cnt) {} |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1078 | |
| 1079 | public: |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1080 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1081 | Kind getKind() const { return kind; } |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1082 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1083 | unsigned getCount() const { return Cnt; } |
| 1084 | QualType getType() const { return T; } |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1085 | |
| 1086 | // Useful predicates. |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1087 | |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 1088 | static bool isError(Kind k) { return k >= ErrorUseAfterRelease; } |
| 1089 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1090 | static bool isLeak(Kind k) { return k == ErrorLeak; } |
| 1091 | |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1092 | bool isOwned() const { |
| 1093 | return getKind() == Owned; |
| 1094 | } |
| 1095 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1096 | bool isNotOwned() const { |
| 1097 | return getKind() == NotOwned; |
| 1098 | } |
| 1099 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1100 | bool isReturnedOwned() const { |
| 1101 | return getKind() == ReturnedOwned; |
| 1102 | } |
| 1103 | |
| 1104 | bool isReturnedNotOwned() const { |
| 1105 | return getKind() == ReturnedNotOwned; |
| 1106 | } |
| 1107 | |
| 1108 | bool isNonLeakError() const { |
| 1109 | Kind k = getKind(); |
| 1110 | return isError(k) && !isLeak(k); |
| 1111 | } |
| 1112 | |
| 1113 | // State creation: normal state. |
| 1114 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1115 | static RefVal makeOwned(QualType t, unsigned Count = 1) { |
| 1116 | return RefVal(Owned, Count, t); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1117 | } |
| 1118 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1119 | static RefVal makeNotOwned(QualType t, unsigned Count = 0) { |
| 1120 | return RefVal(NotOwned, Count, t); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1121 | } |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1122 | |
| 1123 | static RefVal makeReturnedOwned(unsigned Count) { |
| 1124 | return RefVal(ReturnedOwned, Count); |
| 1125 | } |
| 1126 | |
| 1127 | static RefVal makeReturnedNotOwned() { |
| 1128 | return RefVal(ReturnedNotOwned); |
| 1129 | } |
| 1130 | |
| 1131 | // State creation: errors. |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1132 | |
| 1133 | #if 0 |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1134 | static RefVal makeLeak(unsigned Count) { return RefVal(ErrorLeak, Count); } |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1135 | static RefVal makeReleased() { return RefVal(Released); } |
| 1136 | static RefVal makeUseAfterRelease() { return RefVal(ErrorUseAfterRelease); } |
| 1137 | static RefVal makeReleaseNotOwned() { return RefVal(ErrorReleaseNotOwned); } |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1138 | #endif |
| 1139 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1140 | // Comparison, profiling, and pretty-printing. |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1141 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1142 | bool operator==(const RefVal& X) const { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1143 | return kind == X.kind && Cnt == X.Cnt && T == X.T; |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1144 | } |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1145 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1146 | RefVal operator-(size_t i) const { |
| 1147 | return RefVal(getKind(), getCount() - i, getType()); |
| 1148 | } |
| 1149 | |
| 1150 | RefVal operator+(size_t i) const { |
| 1151 | return RefVal(getKind(), getCount() + i, getType()); |
| 1152 | } |
| 1153 | |
| 1154 | RefVal operator^(Kind k) const { |
| 1155 | return RefVal(k, getCount(), getType()); |
| 1156 | } |
| 1157 | |
| 1158 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1159 | void Profile(llvm::FoldingSetNodeID& ID) const { |
| 1160 | ID.AddInteger((unsigned) kind); |
| 1161 | ID.AddInteger(Cnt); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1162 | ID.Add(T); |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1163 | } |
| 1164 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1165 | void print(std::ostream& Out) const; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1166 | }; |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1167 | |
| 1168 | void RefVal::print(std::ostream& Out) const { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1169 | if (!T.isNull()) |
| 1170 | Out << "Tracked Type:" << T.getAsString() << '\n'; |
| 1171 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1172 | switch (getKind()) { |
| 1173 | default: assert(false); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1174 | case Owned: { |
| 1175 | Out << "Owned"; |
| 1176 | unsigned cnt = getCount(); |
| 1177 | if (cnt) Out << " (+ " << cnt << ")"; |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1178 | break; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1179 | } |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1180 | |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1181 | case NotOwned: { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1182 | Out << "NotOwned"; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1183 | unsigned cnt = getCount(); |
| 1184 | if (cnt) Out << " (+ " << cnt << ")"; |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1185 | break; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1186 | } |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1187 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1188 | case ReturnedOwned: { |
| 1189 | Out << "ReturnedOwned"; |
| 1190 | unsigned cnt = getCount(); |
| 1191 | if (cnt) Out << " (+ " << cnt << ")"; |
| 1192 | break; |
| 1193 | } |
| 1194 | |
| 1195 | case ReturnedNotOwned: { |
| 1196 | Out << "ReturnedNotOwned"; |
| 1197 | unsigned cnt = getCount(); |
| 1198 | if (cnt) Out << " (+ " << cnt << ")"; |
| 1199 | break; |
| 1200 | } |
| 1201 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1202 | case Released: |
| 1203 | Out << "Released"; |
| 1204 | break; |
| 1205 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1206 | case ErrorLeak: |
| 1207 | Out << "Leaked"; |
| 1208 | break; |
| 1209 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1210 | case ErrorUseAfterRelease: |
| 1211 | Out << "Use-After-Release [ERROR]"; |
| 1212 | break; |
| 1213 | |
| 1214 | case ErrorReleaseNotOwned: |
| 1215 | Out << "Release of Not-Owned [ERROR]"; |
| 1216 | break; |
| 1217 | } |
| 1218 | } |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1219 | |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1220 | //===----------------------------------------------------------------------===// |
| 1221 | // Transfer functions. |
| 1222 | //===----------------------------------------------------------------------===// |
| 1223 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1224 | class VISIBILITY_HIDDEN CFRefCount : public GRSimpleVals { |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1225 | public: |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1226 | // Type definitions. |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1227 | typedef llvm::ImmutableMap<SymbolID, RefVal> RefBindings; |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1228 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1229 | typedef RefBindings::Factory RefBFactoryTy; |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 1230 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1231 | typedef llvm::DenseMap<GRExprEngine::NodeTy*,std::pair<Expr*, SymbolID> > |
| 1232 | ReleasesNotOwnedTy; |
| 1233 | |
| 1234 | typedef ReleasesNotOwnedTy UseAfterReleasesTy; |
| 1235 | |
| 1236 | typedef llvm::DenseMap<GRExprEngine::NodeTy*, std::vector<SymbolID>*> |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1237 | LeaksTy; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1238 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1239 | class BindingsPrinter : public ValueState::CheckerStatePrinter { |
| 1240 | public: |
| 1241 | virtual void PrintCheckerState(std::ostream& Out, void* State, |
| 1242 | const char* nl, const char* sep); |
| 1243 | }; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1244 | |
| 1245 | private: |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1246 | // Instance variables. |
| 1247 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1248 | RetainSummaryManager Summaries; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1249 | const LangOptions& LOpts; |
| 1250 | RefBFactoryTy RefBFactory; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1251 | |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 1252 | UseAfterReleasesTy UseAfterReleases; |
| 1253 | ReleasesNotOwnedTy ReleasesNotOwned; |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1254 | LeaksTy Leaks; |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 1255 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1256 | BindingsPrinter Printer; |
| 1257 | |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1258 | Selector RetainSelector; |
| 1259 | Selector ReleaseSelector; |
Ted Kremenek | 3281a1f | 2008-05-01 02:18:37 +0000 | [diff] [blame] | 1260 | Selector AutoreleaseSelector; |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1261 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1262 | public: |
| 1263 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1264 | static RefBindings GetRefBindings(const ValueState& StImpl) { |
| 1265 | return RefBindings((const RefBindings::TreeTy*) StImpl.CheckerState); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1266 | } |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1267 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1268 | private: |
| 1269 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1270 | static void SetRefBindings(ValueState& StImpl, RefBindings B) { |
| 1271 | StImpl.CheckerState = B.getRoot(); |
| 1272 | } |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1273 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1274 | RefBindings Remove(RefBindings B, SymbolID sym) { |
| 1275 | return RefBFactory.Remove(B, sym); |
| 1276 | } |
| 1277 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1278 | RefBindings Update(RefBindings B, SymbolID sym, RefVal V, ArgEffect E, |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1279 | RefVal::Kind& hasErr); |
| 1280 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1281 | void ProcessNonLeakError(ExplodedNodeSet<ValueState>& Dst, |
| 1282 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1283 | Expr* NodeExpr, Expr* ErrorExpr, |
| 1284 | ExplodedNode<ValueState>* Pred, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1285 | const ValueState* St, |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1286 | RefVal::Kind hasErr, SymbolID Sym); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1287 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1288 | const ValueState* HandleSymbolDeath(ValueStateManager& VMgr, |
| 1289 | const ValueState* St, |
| 1290 | SymbolID sid, RefVal V, bool& hasLeak); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1291 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1292 | const ValueState* NukeBinding(ValueStateManager& VMgr, const ValueState* St, |
| 1293 | SymbolID sid); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1294 | |
| 1295 | public: |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1296 | |
Ted Kremenek | 9f20c7c | 2008-07-22 16:21:24 +0000 | [diff] [blame] | 1297 | CFRefCount(ASTContext& Ctx, bool gcenabled, const LangOptions& lopts) |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 1298 | : Summaries(Ctx, gcenabled), |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1299 | LOpts(lopts), |
Ted Kremenek | 1bd6ddb | 2008-05-01 18:31:44 +0000 | [diff] [blame] | 1300 | RetainSelector(GetNullarySelector("retain", Ctx)), |
| 1301 | ReleaseSelector(GetNullarySelector("release", Ctx)), |
| 1302 | AutoreleaseSelector(GetNullarySelector("autorelease", Ctx)) {} |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1303 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1304 | virtual ~CFRefCount() { |
| 1305 | for (LeaksTy::iterator I = Leaks.begin(), E = Leaks.end(); I!=E; ++I) |
| 1306 | delete I->second; |
| 1307 | } |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1308 | |
| 1309 | virtual void RegisterChecks(GRExprEngine& Eng); |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1310 | |
| 1311 | virtual ValueState::CheckerStatePrinter* getCheckerStatePrinter() { |
| 1312 | return &Printer; |
| 1313 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1314 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1315 | bool isGCEnabled() const { return Summaries.isGCEnabled(); } |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1316 | const LangOptions& getLangOptions() const { return LOpts; } |
| 1317 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1318 | // Calls. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1319 | |
| 1320 | void EvalSummary(ExplodedNodeSet<ValueState>& Dst, |
| 1321 | GRExprEngine& Eng, |
| 1322 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1323 | Expr* Ex, |
| 1324 | Expr* Receiver, |
| 1325 | RetainSummary* Summ, |
Ted Kremenek | 2719e98 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1326 | ExprIterator arg_beg, ExprIterator arg_end, |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1327 | ExplodedNode<ValueState>* Pred); |
| 1328 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1329 | virtual void EvalCall(ExplodedNodeSet<ValueState>& Dst, |
Ted Kremenek | ce0767f | 2008-03-12 21:06:49 +0000 | [diff] [blame] | 1330 | GRExprEngine& Eng, |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1331 | GRStmtNodeBuilder<ValueState>& Builder, |
Ted Kremenek | 0a6a80b | 2008-04-23 20:12:28 +0000 | [diff] [blame] | 1332 | CallExpr* CE, RVal L, |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1333 | ExplodedNode<ValueState>* Pred); |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1334 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1335 | |
Ted Kremenek | 4b4738b | 2008-04-15 23:44:31 +0000 | [diff] [blame] | 1336 | virtual void EvalObjCMessageExpr(ExplodedNodeSet<ValueState>& Dst, |
| 1337 | GRExprEngine& Engine, |
| 1338 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1339 | ObjCMessageExpr* ME, |
| 1340 | ExplodedNode<ValueState>* Pred); |
| 1341 | |
| 1342 | bool EvalObjCMessageExprAux(ExplodedNodeSet<ValueState>& Dst, |
| 1343 | GRExprEngine& Engine, |
| 1344 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1345 | ObjCMessageExpr* ME, |
| 1346 | ExplodedNode<ValueState>* Pred); |
| 1347 | |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1348 | // Stores. |
| 1349 | |
| 1350 | virtual void EvalStore(ExplodedNodeSet<ValueState>& Dst, |
| 1351 | GRExprEngine& Engine, |
| 1352 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1353 | Expr* E, ExplodedNode<ValueState>* Pred, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1354 | const ValueState* St, RVal TargetLV, RVal Val); |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1355 | // End-of-path. |
| 1356 | |
| 1357 | virtual void EvalEndPath(GRExprEngine& Engine, |
| 1358 | GREndPathNodeBuilder<ValueState>& Builder); |
| 1359 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1360 | virtual void EvalDeadSymbols(ExplodedNodeSet<ValueState>& Dst, |
| 1361 | GRExprEngine& Engine, |
| 1362 | GRStmtNodeBuilder<ValueState>& Builder, |
Ted Kremenek | ac91ce9 | 2008-04-25 01:25:15 +0000 | [diff] [blame] | 1363 | ExplodedNode<ValueState>* Pred, |
| 1364 | Stmt* S, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1365 | const ValueState* St, |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1366 | const ValueStateManager::DeadSymbolsTy& Dead); |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1367 | // Return statements. |
| 1368 | |
| 1369 | virtual void EvalReturn(ExplodedNodeSet<ValueState>& Dst, |
| 1370 | GRExprEngine& Engine, |
| 1371 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1372 | ReturnStmt* S, |
| 1373 | ExplodedNode<ValueState>* Pred); |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1374 | |
| 1375 | // Assumptions. |
| 1376 | |
Ted Kremenek | 76d3166 | 2008-07-17 23:33:10 +0000 | [diff] [blame] | 1377 | virtual const ValueState* EvalAssume(ValueStateManager& VMgr, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1378 | const ValueState* St, RVal Cond, |
| 1379 | bool Assumption, bool& isFeasible); |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1380 | |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1381 | // Error iterators. |
| 1382 | |
| 1383 | typedef UseAfterReleasesTy::iterator use_after_iterator; |
| 1384 | typedef ReleasesNotOwnedTy::iterator bad_release_iterator; |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 1385 | typedef LeaksTy::iterator leaks_iterator; |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1386 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1387 | use_after_iterator use_after_begin() { return UseAfterReleases.begin(); } |
| 1388 | use_after_iterator use_after_end() { return UseAfterReleases.end(); } |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1389 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1390 | bad_release_iterator bad_release_begin() { return ReleasesNotOwned.begin(); } |
| 1391 | bad_release_iterator bad_release_end() { return ReleasesNotOwned.end(); } |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 1392 | |
| 1393 | leaks_iterator leaks_begin() { return Leaks.begin(); } |
| 1394 | leaks_iterator leaks_end() { return Leaks.end(); } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1395 | }; |
| 1396 | |
| 1397 | } // end anonymous namespace |
| 1398 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1399 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1400 | |
| 1401 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1402 | void CFRefCount::BindingsPrinter::PrintCheckerState(std::ostream& Out, |
| 1403 | void* State, const char* nl, |
| 1404 | const char* sep) { |
| 1405 | RefBindings B((RefBindings::TreeTy*) State); |
| 1406 | |
| 1407 | if (State) |
| 1408 | Out << sep << nl; |
| 1409 | |
| 1410 | for (RefBindings::iterator I=B.begin(), E=B.end(); I!=E; ++I) { |
| 1411 | Out << (*I).first << " : "; |
| 1412 | (*I).second.print(Out); |
| 1413 | Out << nl; |
| 1414 | } |
| 1415 | } |
| 1416 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1417 | static inline ArgEffect GetArgE(RetainSummary* Summ, unsigned idx) { |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 1418 | return Summ ? Summ->getArg(idx) : MayEscape; |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1419 | } |
| 1420 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 1421 | static inline RetEffect GetRetEffect(RetainSummary* Summ) { |
| 1422 | return Summ ? Summ->getRetEffect() : RetEffect::MakeNoRet(); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1423 | } |
| 1424 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1425 | static inline ArgEffect GetReceiverE(RetainSummary* Summ) { |
| 1426 | return Summ ? Summ->getReceiverEffect() : DoNothing; |
| 1427 | } |
| 1428 | |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 1429 | static inline bool IsEndPath(RetainSummary* Summ) { |
| 1430 | return Summ ? Summ->isEndPath() : false; |
| 1431 | } |
| 1432 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1433 | void CFRefCount::ProcessNonLeakError(ExplodedNodeSet<ValueState>& Dst, |
| 1434 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1435 | Expr* NodeExpr, Expr* ErrorExpr, |
| 1436 | ExplodedNode<ValueState>* Pred, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1437 | const ValueState* St, |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1438 | RefVal::Kind hasErr, SymbolID Sym) { |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1439 | Builder.BuildSinks = true; |
| 1440 | GRExprEngine::NodeTy* N = Builder.MakeNode(Dst, NodeExpr, Pred, St); |
| 1441 | |
| 1442 | if (!N) return; |
| 1443 | |
| 1444 | switch (hasErr) { |
| 1445 | default: assert(false); |
| 1446 | case RefVal::ErrorUseAfterRelease: |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1447 | UseAfterReleases[N] = std::make_pair(ErrorExpr, Sym); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1448 | break; |
| 1449 | |
| 1450 | case RefVal::ErrorReleaseNotOwned: |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1451 | ReleasesNotOwned[N] = std::make_pair(ErrorExpr, Sym); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1452 | break; |
| 1453 | } |
| 1454 | } |
| 1455 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1456 | /// GetReturnType - Used to get the return type of a message expression or |
| 1457 | /// function call with the intention of affixing that type to a tracked symbol. |
| 1458 | /// While the the return type can be queried directly from RetEx, when |
| 1459 | /// invoking class methods we augment to the return type to be that of |
| 1460 | /// a pointer to the class (as opposed it just being id). |
| 1461 | static QualType GetReturnType(Expr* RetE, ASTContext& Ctx) { |
| 1462 | |
| 1463 | QualType RetTy = RetE->getType(); |
| 1464 | |
| 1465 | // FIXME: We aren't handling id<...>. |
Chris Lattner | b724ab2 | 2008-07-26 22:36:27 +0000 | [diff] [blame] | 1466 | const PointerType* PT = RetTy->getAsPointerType(); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1467 | if (!PT) |
| 1468 | return RetTy; |
| 1469 | |
| 1470 | // If RetEx is not a message expression just return its type. |
| 1471 | // If RetEx is a message expression, return its types if it is something |
| 1472 | /// more specific than id. |
| 1473 | |
| 1474 | ObjCMessageExpr* ME = dyn_cast<ObjCMessageExpr>(RetE); |
| 1475 | |
| 1476 | if (!ME || !Ctx.isObjCIdType(PT->getPointeeType())) |
| 1477 | return RetTy; |
| 1478 | |
| 1479 | ObjCInterfaceDecl* D = ME->getClassInfo().first; |
| 1480 | |
| 1481 | // At this point we know the return type of the message expression is id. |
| 1482 | // If we have an ObjCInterceDecl, we know this is a call to a class method |
| 1483 | // whose type we can resolve. In such cases, promote the return type to |
| 1484 | // Class*. |
| 1485 | return !D ? RetTy : Ctx.getPointerType(Ctx.getObjCInterfaceType(D)); |
| 1486 | } |
| 1487 | |
| 1488 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1489 | void CFRefCount::EvalSummary(ExplodedNodeSet<ValueState>& Dst, |
| 1490 | GRExprEngine& Eng, |
| 1491 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1492 | Expr* Ex, |
| 1493 | Expr* Receiver, |
| 1494 | RetainSummary* Summ, |
Ted Kremenek | 2719e98 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1495 | ExprIterator arg_beg, ExprIterator arg_end, |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1496 | ExplodedNode<ValueState>* Pred) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1497 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1498 | // Get the state. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1499 | ValueStateManager& StateMgr = Eng.getStateManager(); |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1500 | const ValueState* St = Builder.GetState(Pred); |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1501 | |
| 1502 | // Evaluate the effect of the arguments. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1503 | ValueState StVals = *St; |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1504 | RefVal::Kind hasErr = (RefVal::Kind) 0; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1505 | unsigned idx = 0; |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1506 | Expr* ErrorExpr = NULL; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1507 | SymbolID ErrorSym = 0; |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1508 | |
Ted Kremenek | 2719e98 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1509 | for (ExprIterator I = arg_beg; I != arg_end; ++I, ++idx) { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1510 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1511 | RVal V = StateMgr.GetRVal(St, *I); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1512 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1513 | if (isa<lval::SymbolVal>(V)) { |
| 1514 | SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol(); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1515 | RefBindings B = GetRefBindings(StVals); |
| 1516 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1517 | if (RefBindings::data_type* T = B.lookup(Sym)) { |
| 1518 | B = Update(B, Sym, *T, GetArgE(Summ, idx), hasErr); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1519 | SetRefBindings(StVals, B); |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1520 | |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1521 | if (hasErr) { |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1522 | ErrorExpr = *I; |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1523 | ErrorSym = Sym; |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1524 | break; |
| 1525 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1526 | } |
Ted Kremenek | e492420 | 2008-04-11 20:51:02 +0000 | [diff] [blame] | 1527 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1528 | else if (isa<LVal>(V)) { |
Ted Kremenek | 852e3ca | 2008-07-03 23:26:32 +0000 | [diff] [blame] | 1529 | #if 0 |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1530 | // Nuke all arguments passed by reference. |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1531 | StateMgr.Unbind(StVals, cast<LVal>(V)); |
Ted Kremenek | 852e3ca | 2008-07-03 23:26:32 +0000 | [diff] [blame] | 1532 | #else |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 1533 | if (lval::DeclVal* DV = dyn_cast<lval::DeclVal>(&V)) { |
| 1534 | |
| 1535 | if (GetArgE(Summ, idx) == DoNothingByRef) |
| 1536 | continue; |
| 1537 | |
| 1538 | // Invalidate the value of the variable passed by reference. |
Ted Kremenek | 852e3ca | 2008-07-03 23:26:32 +0000 | [diff] [blame] | 1539 | |
| 1540 | // FIXME: Either this logic should also be replicated in GRSimpleVals |
| 1541 | // or should be pulled into a separate "constraint engine." |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 1542 | |
Ted Kremenek | 852e3ca | 2008-07-03 23:26:32 +0000 | [diff] [blame] | 1543 | // FIXME: We can have collisions on the conjured symbol if the |
| 1544 | // expression *I also creates conjured symbols. We probably want |
| 1545 | // to identify conjured symbols by an expression pair: the enclosing |
| 1546 | // expression (the context) and the expression itself. This should |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 1547 | // disambiguate conjured symbols. |
| 1548 | |
| 1549 | // Is the invalidated variable something that we were tracking? |
| 1550 | RVal X = StateMgr.GetRVal(&StVals, *DV); |
Ted Kremenek | 852e3ca | 2008-07-03 23:26:32 +0000 | [diff] [blame] | 1551 | |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 1552 | if (isa<lval::SymbolVal>(X)) { |
| 1553 | SymbolID Sym = cast<lval::SymbolVal>(X).getSymbol(); |
| 1554 | SetRefBindings(StVals,RefBFactory.Remove(GetRefBindings(StVals),Sym)); |
| 1555 | } |
| 1556 | |
Ted Kremenek | 852e3ca | 2008-07-03 23:26:32 +0000 | [diff] [blame] | 1557 | // Set the value of the variable to be a conjured symbol. |
| 1558 | unsigned Count = Builder.getCurrentBlockCount(); |
| 1559 | SymbolID NewSym = Eng.getSymbolManager().getConjuredSymbol(*I, Count); |
| 1560 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1561 | StateMgr.SetRVal(StVals, *DV, |
Ted Kremenek | 852e3ca | 2008-07-03 23:26:32 +0000 | [diff] [blame] | 1562 | LVal::IsLValType(DV->getDecl()->getType()) |
| 1563 | ? cast<RVal>(lval::SymbolVal(NewSym)) |
| 1564 | : cast<RVal>(nonlval::SymbolVal(NewSym))); |
| 1565 | } |
| 1566 | else { |
| 1567 | // Nuke all other arguments passed by reference. |
| 1568 | StateMgr.Unbind(StVals, cast<LVal>(V)); |
| 1569 | } |
| 1570 | #endif |
Ted Kremenek | e492420 | 2008-04-11 20:51:02 +0000 | [diff] [blame] | 1571 | } |
Ted Kremenek | be62129 | 2008-04-22 21:39:21 +0000 | [diff] [blame] | 1572 | else if (isa<nonlval::LValAsInteger>(V)) |
| 1573 | StateMgr.Unbind(StVals, cast<nonlval::LValAsInteger>(V).getLVal()); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1574 | } |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1575 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1576 | // Evaluate the effect on the message receiver. |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1577 | if (!ErrorExpr && Receiver) { |
| 1578 | RVal V = StateMgr.GetRVal(St, Receiver); |
| 1579 | |
| 1580 | if (isa<lval::SymbolVal>(V)) { |
| 1581 | SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol(); |
| 1582 | RefBindings B = GetRefBindings(StVals); |
| 1583 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1584 | if (const RefVal* T = B.lookup(Sym)) { |
| 1585 | B = Update(B, Sym, *T, GetReceiverE(Summ), hasErr); |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1586 | SetRefBindings(StVals, B); |
| 1587 | |
| 1588 | if (hasErr) { |
| 1589 | ErrorExpr = Receiver; |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1590 | ErrorSym = Sym; |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1591 | } |
| 1592 | } |
| 1593 | } |
| 1594 | } |
| 1595 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1596 | // Get the persistent state. |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1597 | St = StateMgr.getPersistentState(StVals); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1598 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1599 | // Process any errors. |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1600 | if (hasErr) { |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1601 | ProcessNonLeakError(Dst, Builder, Ex, ErrorExpr, Pred, St, |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1602 | hasErr, ErrorSym); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1603 | return; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1604 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1605 | |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 1606 | // Consult the summary for the return value. |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 1607 | RetEffect RE = GetRetEffect(Summ); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1608 | |
| 1609 | switch (RE.getKind()) { |
| 1610 | default: |
| 1611 | assert (false && "Unhandled RetEffect."); break; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1612 | |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 1613 | case RetEffect::NoRet: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1614 | |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1615 | // Make up a symbol for the return value (not reference counted). |
Ted Kremenek | e492420 | 2008-04-11 20:51:02 +0000 | [diff] [blame] | 1616 | // FIXME: This is basically copy-and-paste from GRSimpleVals. We |
| 1617 | // should compose behavior, not copy it. |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1618 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1619 | if (Ex->getType() != Eng.getContext().VoidTy) { |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1620 | unsigned Count = Builder.getCurrentBlockCount(); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1621 | SymbolID Sym = Eng.getSymbolManager().getConjuredSymbol(Ex, Count); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1622 | |
Ted Kremenek | 9e2c1ea | 2008-05-09 23:45:33 +0000 | [diff] [blame] | 1623 | RVal X = LVal::IsLValType(Ex->getType()) |
| 1624 | ? cast<RVal>(lval::SymbolVal(Sym)) |
| 1625 | : cast<RVal>(nonlval::SymbolVal(Sym)); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1626 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1627 | St = StateMgr.SetRVal(St, Ex, X, Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1628 | } |
| 1629 | |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 1630 | break; |
| 1631 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1632 | case RetEffect::Alias: { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1633 | unsigned idx = RE.getIndex(); |
Ted Kremenek | 2719e98 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1634 | assert (arg_end >= arg_beg); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1635 | assert (idx < (unsigned) (arg_end - arg_beg)); |
Ted Kremenek | 2719e98 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1636 | RVal V = StateMgr.GetRVal(St, *(arg_beg+idx)); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1637 | St = StateMgr.SetRVal(St, Ex, V, Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1638 | break; |
| 1639 | } |
| 1640 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1641 | case RetEffect::ReceiverAlias: { |
| 1642 | assert (Receiver); |
| 1643 | RVal V = StateMgr.GetRVal(St, Receiver); |
| 1644 | St = StateMgr.SetRVal(St, Ex, V, Eng.getCFG().isBlkExpr(Ex), false); |
| 1645 | break; |
| 1646 | } |
| 1647 | |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 1648 | case RetEffect::OwnedAllocatedSymbol: |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1649 | case RetEffect::OwnedSymbol: { |
| 1650 | unsigned Count = Builder.getCurrentBlockCount(); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1651 | SymbolID Sym = Eng.getSymbolManager().getConjuredSymbol(Ex, Count); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1652 | QualType RetT = GetReturnType(Ex, Eng.getContext()); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1653 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1654 | ValueState StImpl = *St; |
| 1655 | RefBindings B = GetRefBindings(StImpl); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1656 | SetRefBindings(StImpl, RefBFactory.Add(B, Sym, RefVal::makeOwned(RetT))); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1657 | |
| 1658 | St = StateMgr.SetRVal(StateMgr.getPersistentState(StImpl), |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1659 | Ex, lval::SymbolVal(Sym), |
| 1660 | Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1661 | |
Ted Kremenek | 6a1cc25 | 2008-06-23 18:02:52 +0000 | [diff] [blame] | 1662 | // FIXME: Add a flag to the checker where allocations are allowed to fail. |
| 1663 | if (RE.getKind() == RetEffect::OwnedAllocatedSymbol) |
| 1664 | St = StateMgr.AddNE(St, Sym, Eng.getBasicVals().getZeroWithPtrWidth()); |
| 1665 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1666 | break; |
| 1667 | } |
| 1668 | |
| 1669 | case RetEffect::NotOwnedSymbol: { |
| 1670 | unsigned Count = Builder.getCurrentBlockCount(); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1671 | SymbolID Sym = Eng.getSymbolManager().getConjuredSymbol(Ex, Count); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1672 | QualType RetT = GetReturnType(Ex, Eng.getContext()); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1673 | |
| 1674 | ValueState StImpl = *St; |
| 1675 | RefBindings B = GetRefBindings(StImpl); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1676 | SetRefBindings(StImpl, RefBFactory.Add(B, Sym, |
| 1677 | RefVal::makeNotOwned(RetT))); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1678 | |
| 1679 | St = StateMgr.SetRVal(StateMgr.getPersistentState(StImpl), |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1680 | Ex, lval::SymbolVal(Sym), |
| 1681 | Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1682 | |
| 1683 | break; |
| 1684 | } |
| 1685 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1686 | |
Ted Kremenek | f2717b0 | 2008-07-18 17:24:20 +0000 | [diff] [blame] | 1687 | // Is this a sink? |
| 1688 | if (IsEndPath(Summ)) |
| 1689 | Builder.MakeSinkNode(Dst, Ex, Pred, St); |
| 1690 | else |
| 1691 | Builder.MakeNode(Dst, Ex, Pred, St); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1692 | } |
| 1693 | |
| 1694 | |
| 1695 | void CFRefCount::EvalCall(ExplodedNodeSet<ValueState>& Dst, |
| 1696 | GRExprEngine& Eng, |
| 1697 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1698 | CallExpr* CE, RVal L, |
| 1699 | ExplodedNode<ValueState>* Pred) { |
| 1700 | |
| 1701 | |
| 1702 | RetainSummary* Summ = NULL; |
| 1703 | |
| 1704 | // Get the summary. |
| 1705 | |
| 1706 | if (isa<lval::FuncVal>(L)) { |
| 1707 | lval::FuncVal FV = cast<lval::FuncVal>(L); |
| 1708 | FunctionDecl* FD = FV.getDecl(); |
Ted Kremenek | d13c187 | 2008-06-24 03:56:45 +0000 | [diff] [blame] | 1709 | Summ = Summaries.getSummary(FD); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1710 | } |
| 1711 | |
| 1712 | EvalSummary(Dst, Eng, Builder, CE, 0, Summ, |
| 1713 | CE->arg_begin(), CE->arg_end(), Pred); |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 1714 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1715 | |
Ted Kremenek | 4b4738b | 2008-04-15 23:44:31 +0000 | [diff] [blame] | 1716 | |
| 1717 | void CFRefCount::EvalObjCMessageExpr(ExplodedNodeSet<ValueState>& Dst, |
| 1718 | GRExprEngine& Eng, |
| 1719 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1720 | ObjCMessageExpr* ME, |
| 1721 | ExplodedNode<ValueState>* Pred) { |
| 1722 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1723 | RetainSummary* Summ; |
Ted Kremenek | 3366180 | 2008-05-01 21:31:50 +0000 | [diff] [blame] | 1724 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1725 | if (Expr* Receiver = ME->getReceiver()) { |
| 1726 | // We need the type-information of the tracked receiver object |
| 1727 | // Retrieve it from the state. |
| 1728 | ObjCInterfaceDecl* ID = 0; |
| 1729 | |
| 1730 | // FIXME: Wouldn't it be great if this code could be reduced? It's just |
| 1731 | // a chain of lookups. |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1732 | const ValueState* St = Builder.GetState(Pred); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1733 | RVal V = Eng.getStateManager().GetRVal(St, Receiver ); |
| 1734 | |
| 1735 | if (isa<lval::SymbolVal>(V)) { |
| 1736 | SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol(); |
| 1737 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1738 | if (const RefVal* T = GetRefBindings(*St).lookup(Sym)) { |
| 1739 | QualType Ty = T->getType(); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1740 | |
| 1741 | if (const PointerType* PT = Ty->getAsPointerType()) { |
| 1742 | QualType PointeeTy = PT->getPointeeType(); |
| 1743 | |
| 1744 | if (ObjCInterfaceType* IT = dyn_cast<ObjCInterfaceType>(PointeeTy)) |
| 1745 | ID = IT->getDecl(); |
| 1746 | } |
| 1747 | } |
| 1748 | } |
| 1749 | |
| 1750 | Summ = Summaries.getMethodSummary(ME, ID); |
| 1751 | } |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1752 | else |
Ted Kremenek | 97c1e0c | 2008-06-23 22:21:20 +0000 | [diff] [blame] | 1753 | Summ = Summaries.getClassMethodSummary(ME->getClassName(), |
| 1754 | ME->getSelector()); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1755 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1756 | EvalSummary(Dst, Eng, Builder, ME, ME->getReceiver(), Summ, |
| 1757 | ME->arg_begin(), ME->arg_end(), Pred); |
Ted Kremenek | 4b4738b | 2008-04-15 23:44:31 +0000 | [diff] [blame] | 1758 | } |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1759 | |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1760 | // Stores. |
| 1761 | |
| 1762 | void CFRefCount::EvalStore(ExplodedNodeSet<ValueState>& Dst, |
| 1763 | GRExprEngine& Eng, |
| 1764 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1765 | Expr* E, ExplodedNode<ValueState>* Pred, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1766 | const ValueState* St, RVal TargetLV, RVal Val) { |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1767 | |
| 1768 | // Check if we have a binding for "Val" and if we are storing it to something |
| 1769 | // we don't understand or otherwise the value "escapes" the function. |
| 1770 | |
| 1771 | if (!isa<lval::SymbolVal>(Val)) |
| 1772 | return; |
| 1773 | |
| 1774 | // Are we storing to something that causes the value to "escape"? |
| 1775 | |
| 1776 | bool escapes = false; |
| 1777 | |
| 1778 | if (!isa<lval::DeclVal>(TargetLV)) |
| 1779 | escapes = true; |
| 1780 | else |
| 1781 | escapes = cast<lval::DeclVal>(TargetLV).getDecl()->hasGlobalStorage(); |
| 1782 | |
| 1783 | if (!escapes) |
| 1784 | return; |
| 1785 | |
| 1786 | SymbolID Sym = cast<lval::SymbolVal>(Val).getSymbol(); |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1787 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1788 | if (!GetRefBindings(*St).lookup(Sym)) |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1789 | return; |
| 1790 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1791 | // Nuke the binding. |
| 1792 | St = NukeBinding(Eng.getStateManager(), St, Sym); |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1793 | |
| 1794 | // Hand of the remaining logic to the parent implementation. |
| 1795 | GRSimpleVals::EvalStore(Dst, Eng, Builder, E, Pred, St, TargetLV, Val); |
| 1796 | } |
| 1797 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1798 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1799 | const ValueState* CFRefCount::NukeBinding(ValueStateManager& VMgr, |
| 1800 | const ValueState* St, |
| 1801 | SymbolID sid) { |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1802 | ValueState StImpl = *St; |
| 1803 | RefBindings B = GetRefBindings(StImpl); |
| 1804 | StImpl.CheckerState = RefBFactory.Remove(B, sid).getRoot(); |
| 1805 | return VMgr.getPersistentState(StImpl); |
| 1806 | } |
| 1807 | |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1808 | // End-of-path. |
| 1809 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1810 | const ValueState* CFRefCount::HandleSymbolDeath(ValueStateManager& VMgr, |
| 1811 | const ValueState* St, SymbolID sid, |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1812 | RefVal V, bool& hasLeak) { |
| 1813 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1814 | hasLeak = V.isOwned() || |
| 1815 | ((V.isNotOwned() || V.isReturnedOwned()) && V.getCount() > 0); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1816 | |
| 1817 | if (!hasLeak) |
| 1818 | return NukeBinding(VMgr, St, sid); |
| 1819 | |
| 1820 | RefBindings B = GetRefBindings(*St); |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 1821 | ValueState StImpl = *St; |
| 1822 | StImpl.CheckerState = RefBFactory.Add(B, sid, V^RefVal::ErrorLeak).getRoot(); |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1823 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1824 | return VMgr.getPersistentState(StImpl); |
| 1825 | } |
| 1826 | |
| 1827 | void CFRefCount::EvalEndPath(GRExprEngine& Eng, |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1828 | GREndPathNodeBuilder<ValueState>& Builder) { |
| 1829 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1830 | const ValueState* St = Builder.getState(); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1831 | RefBindings B = GetRefBindings(*St); |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1832 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1833 | llvm::SmallVector<SymbolID, 10> Leaked; |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1834 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1835 | for (RefBindings::iterator I = B.begin(), E = B.end(); I != E; ++I) { |
| 1836 | bool hasLeak = false; |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1837 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1838 | St = HandleSymbolDeath(Eng.getStateManager(), St, |
| 1839 | (*I).first, (*I).second, hasLeak); |
| 1840 | |
| 1841 | if (hasLeak) Leaked.push_back((*I).first); |
| 1842 | } |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1843 | |
| 1844 | if (Leaked.empty()) |
| 1845 | return; |
| 1846 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1847 | ExplodedNode<ValueState>* N = Builder.MakeNode(St); |
Ted Kremenek | cfc909d | 2008-04-18 16:30:14 +0000 | [diff] [blame] | 1848 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1849 | if (!N) |
Ted Kremenek | cfc909d | 2008-04-18 16:30:14 +0000 | [diff] [blame] | 1850 | return; |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1851 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1852 | std::vector<SymbolID>*& LeaksAtNode = Leaks[N]; |
| 1853 | assert (!LeaksAtNode); |
| 1854 | LeaksAtNode = new std::vector<SymbolID>(); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1855 | |
| 1856 | for (llvm::SmallVector<SymbolID, 10>::iterator I=Leaked.begin(), |
| 1857 | E = Leaked.end(); I != E; ++I) |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1858 | (*LeaksAtNode).push_back(*I); |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1859 | } |
| 1860 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1861 | // Dead symbols. |
| 1862 | |
| 1863 | void CFRefCount::EvalDeadSymbols(ExplodedNodeSet<ValueState>& Dst, |
| 1864 | GRExprEngine& Eng, |
| 1865 | GRStmtNodeBuilder<ValueState>& Builder, |
Ted Kremenek | ac91ce9 | 2008-04-25 01:25:15 +0000 | [diff] [blame] | 1866 | ExplodedNode<ValueState>* Pred, |
| 1867 | Stmt* S, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1868 | const ValueState* St, |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1869 | const ValueStateManager::DeadSymbolsTy& Dead) { |
Ted Kremenek | ac91ce9 | 2008-04-25 01:25:15 +0000 | [diff] [blame] | 1870 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1871 | // FIXME: a lot of copy-and-paste from EvalEndPath. Refactor. |
| 1872 | |
| 1873 | RefBindings B = GetRefBindings(*St); |
| 1874 | llvm::SmallVector<SymbolID, 10> Leaked; |
| 1875 | |
| 1876 | for (ValueStateManager::DeadSymbolsTy::const_iterator |
| 1877 | I=Dead.begin(), E=Dead.end(); I!=E; ++I) { |
| 1878 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1879 | const RefVal* T = B.lookup(*I); |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1880 | |
| 1881 | if (!T) |
| 1882 | continue; |
| 1883 | |
| 1884 | bool hasLeak = false; |
| 1885 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1886 | St = HandleSymbolDeath(Eng.getStateManager(), St, *I, *T, hasLeak); |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1887 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1888 | if (hasLeak) |
| 1889 | Leaked.push_back(*I); |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1890 | } |
| 1891 | |
| 1892 | if (Leaked.empty()) |
| 1893 | return; |
| 1894 | |
| 1895 | ExplodedNode<ValueState>* N = Builder.MakeNode(Dst, S, Pred, St); |
| 1896 | |
| 1897 | if (!N) |
| 1898 | return; |
| 1899 | |
| 1900 | std::vector<SymbolID>*& LeaksAtNode = Leaks[N]; |
| 1901 | assert (!LeaksAtNode); |
| 1902 | LeaksAtNode = new std::vector<SymbolID>(); |
| 1903 | |
| 1904 | for (llvm::SmallVector<SymbolID, 10>::iterator I=Leaked.begin(), |
| 1905 | E = Leaked.end(); I != E; ++I) |
| 1906 | (*LeaksAtNode).push_back(*I); |
| 1907 | } |
| 1908 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1909 | // Return statements. |
| 1910 | |
| 1911 | void CFRefCount::EvalReturn(ExplodedNodeSet<ValueState>& Dst, |
| 1912 | GRExprEngine& Eng, |
| 1913 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1914 | ReturnStmt* S, |
| 1915 | ExplodedNode<ValueState>* Pred) { |
| 1916 | |
| 1917 | Expr* RetE = S->getRetValue(); |
| 1918 | if (!RetE) return; |
| 1919 | |
| 1920 | ValueStateManager& StateMgr = Eng.getStateManager(); |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1921 | const ValueState* St = Builder.GetState(Pred); |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1922 | RVal V = StateMgr.GetRVal(St, RetE); |
| 1923 | |
| 1924 | if (!isa<lval::SymbolVal>(V)) |
| 1925 | return; |
| 1926 | |
| 1927 | // Get the reference count binding (if any). |
| 1928 | SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol(); |
| 1929 | RefBindings B = GetRefBindings(*St); |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1930 | const RefVal* T = B.lookup(Sym); |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1931 | |
| 1932 | if (!T) |
| 1933 | return; |
| 1934 | |
| 1935 | // Change the reference count. |
| 1936 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 1937 | RefVal X = *T; |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1938 | |
| 1939 | switch (X.getKind()) { |
| 1940 | |
| 1941 | case RefVal::Owned: { |
| 1942 | unsigned cnt = X.getCount(); |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 1943 | assert (cnt > 0); |
| 1944 | X = RefVal::makeReturnedOwned(cnt - 1); |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1945 | break; |
| 1946 | } |
| 1947 | |
| 1948 | case RefVal::NotOwned: { |
| 1949 | unsigned cnt = X.getCount(); |
| 1950 | X = cnt ? RefVal::makeReturnedOwned(cnt - 1) |
| 1951 | : RefVal::makeReturnedNotOwned(); |
| 1952 | break; |
| 1953 | } |
| 1954 | |
| 1955 | default: |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1956 | return; |
| 1957 | } |
| 1958 | |
| 1959 | // Update the binding. |
| 1960 | |
| 1961 | ValueState StImpl = *St; |
| 1962 | StImpl.CheckerState = RefBFactory.Add(B, Sym, X).getRoot(); |
| 1963 | Builder.MakeNode(Dst, S, Pred, StateMgr.getPersistentState(StImpl)); |
| 1964 | } |
| 1965 | |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1966 | // Assumptions. |
| 1967 | |
Ted Kremenek | 76d3166 | 2008-07-17 23:33:10 +0000 | [diff] [blame] | 1968 | const ValueState* CFRefCount::EvalAssume(ValueStateManager& VMgr, |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 1969 | const ValueState* St, |
| 1970 | RVal Cond, bool Assumption, |
| 1971 | bool& isFeasible) { |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1972 | |
| 1973 | // FIXME: We may add to the interface of EvalAssume the list of symbols |
| 1974 | // whose assumptions have changed. For now we just iterate through the |
| 1975 | // bindings and check if any of the tracked symbols are NULL. This isn't |
| 1976 | // too bad since the number of symbols we will track in practice are |
| 1977 | // probably small and EvalAssume is only called at branches and a few |
| 1978 | // other places. |
| 1979 | |
| 1980 | RefBindings B = GetRefBindings(*St); |
| 1981 | |
| 1982 | if (B.isEmpty()) |
| 1983 | return St; |
| 1984 | |
| 1985 | bool changed = false; |
| 1986 | |
| 1987 | for (RefBindings::iterator I=B.begin(), E=B.end(); I!=E; ++I) { |
| 1988 | |
| 1989 | // Check if the symbol is null (or equal to any constant). |
| 1990 | // If this is the case, stop tracking the symbol. |
| 1991 | |
| 1992 | if (St->getSymVal(I.getKey())) { |
| 1993 | changed = true; |
| 1994 | B = RefBFactory.Remove(B, I.getKey()); |
| 1995 | } |
| 1996 | } |
| 1997 | |
| 1998 | if (!changed) |
| 1999 | return St; |
| 2000 | |
| 2001 | ValueState StImpl = *St; |
| 2002 | StImpl.CheckerState = B.getRoot(); |
Ted Kremenek | 76d3166 | 2008-07-17 23:33:10 +0000 | [diff] [blame] | 2003 | return VMgr.getPersistentState(StImpl); |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 2004 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2005 | |
| 2006 | CFRefCount::RefBindings CFRefCount::Update(RefBindings B, SymbolID sym, |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2007 | RefVal V, ArgEffect E, |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 2008 | RefVal::Kind& hasErr) { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2009 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2010 | // FIXME: This dispatch can potentially be sped up by unifiying it into |
| 2011 | // a single switch statement. Opt for simplicity for now. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2012 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2013 | switch (E) { |
| 2014 | default: |
| 2015 | assert (false && "Unhandled CFRef transition."); |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 2016 | |
| 2017 | case MayEscape: |
| 2018 | if (V.getKind() == RefVal::Owned) { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2019 | V = V ^ RefVal::NotOwned; |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 2020 | break; |
| 2021 | } |
| 2022 | |
| 2023 | // Fall-through. |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2024 | |
Ted Kremenek | ede40b7 | 2008-07-09 18:11:16 +0000 | [diff] [blame] | 2025 | case DoNothingByRef: |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2026 | case DoNothing: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 2027 | if (!isGCEnabled() && V.getKind() == RefVal::Released) { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2028 | V = V ^ RefVal::ErrorUseAfterRelease; |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 2029 | hasErr = V.getKind(); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 2030 | break; |
| 2031 | } |
| 2032 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2033 | return B; |
Ted Kremenek | e5a4bb0 | 2008-06-30 16:57:41 +0000 | [diff] [blame] | 2034 | |
Ted Kremenek | 4e1d22f | 2008-07-01 00:01:02 +0000 | [diff] [blame] | 2035 | case Autorelease: |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 2036 | case StopTracking: |
| 2037 | return RefBFactory.Remove(B, sym); |
| 2038 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2039 | case IncRef: |
| 2040 | switch (V.getKind()) { |
| 2041 | default: |
| 2042 | assert(false); |
| 2043 | |
| 2044 | case RefVal::Owned: |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2045 | case RefVal::NotOwned: |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2046 | V = V + 1; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2047 | break; |
| 2048 | |
| 2049 | case RefVal::Released: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 2050 | if (isGCEnabled()) |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2051 | V = V ^ RefVal::Owned; |
Ted Kremenek | e2dd957 | 2008-04-29 05:44:10 +0000 | [diff] [blame] | 2052 | else { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2053 | V = V ^ RefVal::ErrorUseAfterRelease; |
Ted Kremenek | e2dd957 | 2008-04-29 05:44:10 +0000 | [diff] [blame] | 2054 | hasErr = V.getKind(); |
| 2055 | } |
| 2056 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2057 | break; |
| 2058 | } |
| 2059 | |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 2060 | break; |
| 2061 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2062 | case SelfOwn: |
| 2063 | V = V ^ RefVal::NotOwned; |
| 2064 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2065 | case DecRef: |
| 2066 | switch (V.getKind()) { |
| 2067 | default: |
| 2068 | assert (false); |
| 2069 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2070 | case RefVal::Owned: |
| 2071 | V = V.getCount() > 1 ? V - 1 : V ^ RefVal::Released; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2072 | break; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2073 | |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2074 | case RefVal::NotOwned: |
| 2075 | if (V.getCount() > 0) |
| 2076 | V = V - 1; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 2077 | else { |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2078 | V = V ^ RefVal::ErrorReleaseNotOwned; |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 2079 | hasErr = V.getKind(); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 2080 | } |
| 2081 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2082 | break; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2083 | |
| 2084 | case RefVal::Released: |
Ted Kremenek | 272aa85 | 2008-06-25 21:21:56 +0000 | [diff] [blame] | 2085 | V = V ^ RefVal::ErrorUseAfterRelease; |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 2086 | hasErr = V.getKind(); |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2087 | break; |
| 2088 | } |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 2089 | |
| 2090 | break; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 2091 | } |
| 2092 | |
| 2093 | return RefBFactory.Add(B, sym, V); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2094 | } |
| 2095 | |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2096 | |
| 2097 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2098 | // Error reporting. |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2099 | //===----------------------------------------------------------------------===// |
| 2100 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2101 | namespace { |
| 2102 | |
| 2103 | //===-------------===// |
| 2104 | // Bug Descriptions. // |
| 2105 | //===-------------===// |
| 2106 | |
Ted Kremenek | e376985 | 2008-04-18 20:54:29 +0000 | [diff] [blame] | 2107 | class VISIBILITY_HIDDEN CFRefBug : public BugTypeCacheLocation { |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2108 | protected: |
| 2109 | CFRefCount& TF; |
| 2110 | |
| 2111 | public: |
| 2112 | CFRefBug(CFRefCount& tf) : TF(tf) {} |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2113 | |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 2114 | CFRefCount& getTF() { return TF; } |
Ted Kremenek | 0ff3f20 | 2008-05-05 23:16:31 +0000 | [diff] [blame] | 2115 | const CFRefCount& getTF() const { return TF; } |
| 2116 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2117 | virtual bool isLeak() const { return false; } |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2118 | }; |
| 2119 | |
| 2120 | class VISIBILITY_HIDDEN UseAfterRelease : public CFRefBug { |
| 2121 | public: |
| 2122 | UseAfterRelease(CFRefCount& tf) : CFRefBug(tf) {} |
| 2123 | |
| 2124 | virtual const char* getName() const { |
Ted Kremenek | 0ff3f20 | 2008-05-05 23:16:31 +0000 | [diff] [blame] | 2125 | return "Use-After-Release"; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2126 | } |
| 2127 | virtual const char* getDescription() const { |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2128 | return "Reference-counted object is used" |
| 2129 | " after it is released."; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2130 | } |
| 2131 | |
| 2132 | virtual void EmitWarnings(BugReporter& BR); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2133 | }; |
| 2134 | |
| 2135 | class VISIBILITY_HIDDEN BadRelease : public CFRefBug { |
| 2136 | public: |
| 2137 | BadRelease(CFRefCount& tf) : CFRefBug(tf) {} |
| 2138 | |
| 2139 | virtual const char* getName() const { |
Ted Kremenek | 0ff3f20 | 2008-05-05 23:16:31 +0000 | [diff] [blame] | 2140 | return "Bad Release"; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2141 | } |
| 2142 | virtual const char* getDescription() const { |
| 2143 | return "Incorrect decrement of the reference count of a " |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2144 | "CoreFoundation object: " |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2145 | "The object is not owned at this point by the caller."; |
| 2146 | } |
| 2147 | |
| 2148 | virtual void EmitWarnings(BugReporter& BR); |
| 2149 | }; |
| 2150 | |
| 2151 | class VISIBILITY_HIDDEN Leak : public CFRefBug { |
| 2152 | public: |
| 2153 | Leak(CFRefCount& tf) : CFRefBug(tf) {} |
| 2154 | |
| 2155 | virtual const char* getName() const { |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame] | 2156 | |
| 2157 | if (getTF().isGCEnabled()) |
| 2158 | return "Memory Leak (GC)"; |
| 2159 | |
| 2160 | if (getTF().getLangOptions().getGCMode() == LangOptions::HybridGC) |
| 2161 | return "Memory Leak (Hybrid MM, non-GC)"; |
| 2162 | |
| 2163 | assert (getTF().getLangOptions().getGCMode() == LangOptions::NonGC); |
| 2164 | return "Memory Leak"; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2165 | } |
| 2166 | |
| 2167 | virtual const char* getDescription() const { |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2168 | return "Object leaked."; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2169 | } |
| 2170 | |
| 2171 | virtual void EmitWarnings(BugReporter& BR); |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 2172 | virtual void GetErrorNodes(std::vector<ExplodedNode<ValueState>*>& Nodes); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2173 | virtual bool isLeak() const { return true; } |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2174 | virtual bool isCached(BugReport& R); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2175 | }; |
| 2176 | |
| 2177 | //===---------===// |
| 2178 | // Bug Reports. // |
| 2179 | //===---------===// |
| 2180 | |
| 2181 | class VISIBILITY_HIDDEN CFRefReport : public RangedBugReport { |
| 2182 | SymbolID Sym; |
| 2183 | public: |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2184 | CFRefReport(CFRefBug& D, ExplodedNode<ValueState> *n, SymbolID sym) |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2185 | : RangedBugReport(D, n), Sym(sym) {} |
| 2186 | |
| 2187 | virtual ~CFRefReport() {} |
| 2188 | |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 2189 | CFRefBug& getBugType() { |
| 2190 | return (CFRefBug&) RangedBugReport::getBugType(); |
| 2191 | } |
| 2192 | const CFRefBug& getBugType() const { |
| 2193 | return (const CFRefBug&) RangedBugReport::getBugType(); |
| 2194 | } |
| 2195 | |
| 2196 | virtual void getRanges(BugReporter& BR, const SourceRange*& beg, |
| 2197 | const SourceRange*& end) { |
| 2198 | |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2199 | if (!getBugType().isLeak()) |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 2200 | RangedBugReport::getRanges(BR, beg, end); |
| 2201 | else { |
| 2202 | beg = 0; |
| 2203 | end = 0; |
| 2204 | } |
| 2205 | } |
| 2206 | |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2207 | SymbolID getSymbol() const { return Sym; } |
| 2208 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2209 | virtual PathDiagnosticPiece* getEndPath(BugReporter& BR, |
| 2210 | ExplodedNode<ValueState>* N); |
| 2211 | |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2212 | virtual std::pair<const char**,const char**> getExtraDescriptiveText(); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2213 | |
| 2214 | virtual PathDiagnosticPiece* VisitNode(ExplodedNode<ValueState>* N, |
| 2215 | ExplodedNode<ValueState>* PrevN, |
| 2216 | ExplodedGraph<ValueState>& G, |
| 2217 | BugReporter& BR); |
| 2218 | }; |
| 2219 | |
| 2220 | |
| 2221 | } // end anonymous namespace |
| 2222 | |
| 2223 | void CFRefCount::RegisterChecks(GRExprEngine& Eng) { |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2224 | Eng.Register(new UseAfterRelease(*this)); |
| 2225 | Eng.Register(new BadRelease(*this)); |
| 2226 | Eng.Register(new Leak(*this)); |
| 2227 | } |
| 2228 | |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2229 | |
| 2230 | static const char* Msgs[] = { |
| 2231 | "Code is compiled in garbage collection only mode" // GC only |
| 2232 | " (the bug occurs with garbage collection enabled).", |
| 2233 | |
| 2234 | "Code is compiled without garbage collection.", // No GC. |
| 2235 | |
| 2236 | "Code is compiled for use with and without garbage collection (GC)." |
| 2237 | " The bug occurs with GC enabled.", // Hybrid, with GC. |
| 2238 | |
| 2239 | "Code is compiled for use with and without garbage collection (GC)." |
| 2240 | " The bug occurs in non-GC mode." // Hyrbird, without GC/ |
| 2241 | }; |
| 2242 | |
| 2243 | std::pair<const char**,const char**> CFRefReport::getExtraDescriptiveText() { |
| 2244 | CFRefCount& TF = static_cast<CFRefBug&>(getBugType()).getTF(); |
| 2245 | |
| 2246 | switch (TF.getLangOptions().getGCMode()) { |
| 2247 | default: |
| 2248 | assert(false); |
Ted Kremenek | cb470940 | 2008-05-01 04:02:04 +0000 | [diff] [blame] | 2249 | |
| 2250 | case LangOptions::GCOnly: |
| 2251 | assert (TF.isGCEnabled()); |
| 2252 | return std::make_pair(&Msgs[0], &Msgs[0]+1); |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2253 | |
| 2254 | case LangOptions::NonGC: |
| 2255 | assert (!TF.isGCEnabled()); |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2256 | return std::make_pair(&Msgs[1], &Msgs[1]+1); |
| 2257 | |
| 2258 | case LangOptions::HybridGC: |
| 2259 | if (TF.isGCEnabled()) |
| 2260 | return std::make_pair(&Msgs[2], &Msgs[2]+1); |
| 2261 | else |
| 2262 | return std::make_pair(&Msgs[3], &Msgs[3]+1); |
| 2263 | } |
| 2264 | } |
| 2265 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2266 | PathDiagnosticPiece* CFRefReport::VisitNode(ExplodedNode<ValueState>* N, |
| 2267 | ExplodedNode<ValueState>* PrevN, |
| 2268 | ExplodedGraph<ValueState>& G, |
| 2269 | BugReporter& BR) { |
| 2270 | |
| 2271 | // Check if the type state has changed. |
| 2272 | |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 2273 | const ValueState* PrevSt = PrevN->getState(); |
| 2274 | const ValueState* CurrSt = N->getState(); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2275 | |
| 2276 | CFRefCount::RefBindings PrevB = CFRefCount::GetRefBindings(*PrevSt); |
| 2277 | CFRefCount::RefBindings CurrB = CFRefCount::GetRefBindings(*CurrSt); |
| 2278 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 2279 | const RefVal* PrevT = PrevB.lookup(Sym); |
| 2280 | const RefVal* CurrT = CurrB.lookup(Sym); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2281 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2282 | if (!CurrT) |
| 2283 | return NULL; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2284 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2285 | const char* Msg = NULL; |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 2286 | const RefVal& CurrV = *CurrB.lookup(Sym); |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2287 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2288 | if (!PrevT) { |
| 2289 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2290 | Stmt* S = cast<PostStmt>(N->getLocation()).getStmt(); |
| 2291 | |
| 2292 | if (CurrV.isOwned()) { |
| 2293 | |
| 2294 | if (isa<CallExpr>(S)) |
| 2295 | Msg = "Function call returns an object with a +1 retain count" |
| 2296 | " (owning reference)."; |
| 2297 | else { |
| 2298 | assert (isa<ObjCMessageExpr>(S)); |
| 2299 | Msg = "Method returns an object with a +1 retain count" |
| 2300 | " (owning reference)."; |
| 2301 | } |
| 2302 | } |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2303 | else { |
| 2304 | assert (CurrV.isNotOwned()); |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2305 | |
| 2306 | if (isa<CallExpr>(S)) |
| 2307 | Msg = "Function call returns an object with a +0 retain count" |
| 2308 | " (non-owning reference)."; |
| 2309 | else { |
| 2310 | assert (isa<ObjCMessageExpr>(S)); |
| 2311 | Msg = "Method returns an object with a +0 retain count" |
| 2312 | " (non-owning reference)."; |
| 2313 | } |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2314 | } |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2315 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2316 | FullSourceLoc Pos(S->getLocStart(), BR.getContext().getSourceManager()); |
| 2317 | PathDiagnosticPiece* P = new PathDiagnosticPiece(Pos, Msg); |
| 2318 | |
| 2319 | if (Expr* Exp = dyn_cast<Expr>(S)) |
| 2320 | P->addRange(Exp->getSourceRange()); |
| 2321 | |
| 2322 | return P; |
| 2323 | } |
| 2324 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 2325 | // Determine if the typestate has changed. |
| 2326 | RefVal PrevV = *PrevB.lookup(Sym); |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2327 | |
| 2328 | if (PrevV == CurrV) |
| 2329 | return NULL; |
| 2330 | |
| 2331 | // The typestate has changed. |
| 2332 | |
| 2333 | std::ostringstream os; |
| 2334 | |
| 2335 | switch (CurrV.getKind()) { |
| 2336 | case RefVal::Owned: |
| 2337 | case RefVal::NotOwned: |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 2338 | |
| 2339 | if (PrevV.getCount() == CurrV.getCount()) |
| 2340 | return 0; |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2341 | |
| 2342 | if (PrevV.getCount() > CurrV.getCount()) |
| 2343 | os << "Reference count decremented."; |
| 2344 | else |
| 2345 | os << "Reference count incremented."; |
| 2346 | |
Ted Kremenek | a3f30dd | 2008-05-22 17:31:13 +0000 | [diff] [blame] | 2347 | if (unsigned Count = CurrV.getCount()) { |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2348 | |
| 2349 | os << " Object has +" << Count; |
Ted Kremenek | 752b584 | 2008-04-18 05:32:44 +0000 | [diff] [blame] | 2350 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2351 | if (Count > 1) |
| 2352 | os << " retain counts."; |
Ted Kremenek | 752b584 | 2008-04-18 05:32:44 +0000 | [diff] [blame] | 2353 | else |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2354 | os << " retain count."; |
Ted Kremenek | 752b584 | 2008-04-18 05:32:44 +0000 | [diff] [blame] | 2355 | } |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2356 | |
| 2357 | Msg = os.str().c_str(); |
| 2358 | |
| 2359 | break; |
| 2360 | |
| 2361 | case RefVal::Released: |
| 2362 | Msg = "Object released."; |
| 2363 | break; |
| 2364 | |
| 2365 | case RefVal::ReturnedOwned: |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2366 | Msg = "Object returned to caller as owning reference (single retain count" |
| 2367 | " transferred to caller)."; |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2368 | break; |
| 2369 | |
| 2370 | case RefVal::ReturnedNotOwned: |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2371 | Msg = "Object returned to caller with a +0 (non-owning) retain count."; |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2372 | break; |
| 2373 | |
| 2374 | default: |
| 2375 | return NULL; |
| 2376 | } |
| 2377 | |
| 2378 | Stmt* S = cast<PostStmt>(N->getLocation()).getStmt(); |
| 2379 | FullSourceLoc Pos(S->getLocStart(), BR.getContext().getSourceManager()); |
| 2380 | PathDiagnosticPiece* P = new PathDiagnosticPiece(Pos, Msg); |
| 2381 | |
| 2382 | // Add the range by scanning the children of the statement for any bindings |
| 2383 | // to Sym. |
| 2384 | |
Ted Kremenek | ba1c7ed | 2008-07-02 21:24:01 +0000 | [diff] [blame] | 2385 | ValueStateManager& VSM = cast<GRBugReporter>(BR).getStateManager(); |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 2386 | |
| 2387 | for (Stmt::child_iterator I = S->child_begin(), E = S->child_end(); I!=E; ++I) |
| 2388 | if (Expr* Exp = dyn_cast_or_null<Expr>(*I)) { |
| 2389 | RVal X = VSM.GetRVal(CurrSt, Exp); |
| 2390 | |
| 2391 | if (lval::SymbolVal* SV = dyn_cast<lval::SymbolVal>(&X)) |
| 2392 | if (SV->getSymbol() == Sym) { |
| 2393 | P->addRange(Exp->getSourceRange()); break; |
| 2394 | } |
| 2395 | } |
| 2396 | |
| 2397 | return P; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2398 | } |
| 2399 | |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2400 | static std::pair<ExplodedNode<ValueState>*,VarDecl*> |
| 2401 | GetAllocationSite(ExplodedNode<ValueState>* N, SymbolID Sym) { |
| 2402 | |
| 2403 | typedef CFRefCount::RefBindings RefBindings; |
| 2404 | ExplodedNode<ValueState>* Last = N; |
| 2405 | |
| 2406 | // Find the first node that referred to the tracked symbol. We also |
| 2407 | // try and find the first VarDecl the value was stored to. |
| 2408 | |
| 2409 | VarDecl* FirstDecl = 0; |
| 2410 | |
| 2411 | while (N) { |
Ted Kremenek | f22f868 | 2008-07-10 22:03:41 +0000 | [diff] [blame] | 2412 | const ValueState* St = N->getState(); |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2413 | RefBindings B = RefBindings((RefBindings::TreeTy*) St->CheckerState); |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2414 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 2415 | if (!B.lookup(Sym)) |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2416 | break; |
| 2417 | |
| 2418 | VarDecl* VD = 0; |
| 2419 | |
| 2420 | // Determine if there is an LVal binding to the symbol. |
| 2421 | for (ValueState::vb_iterator I=St->vb_begin(), E=St->vb_end(); I!=E; ++I) { |
| 2422 | if (!isa<lval::SymbolVal>(I->second) // Is the value a symbol? |
| 2423 | || cast<lval::SymbolVal>(I->second).getSymbol() != Sym) |
| 2424 | continue; |
| 2425 | |
| 2426 | if (VD) { // Multiple decls map to this symbol. |
| 2427 | VD = 0; |
| 2428 | break; |
| 2429 | } |
| 2430 | |
| 2431 | VD = I->first; |
| 2432 | } |
| 2433 | |
| 2434 | if (VD) FirstDecl = VD; |
| 2435 | |
| 2436 | Last = N; |
| 2437 | N = N->pred_empty() ? NULL : *(N->pred_begin()); |
| 2438 | } |
| 2439 | |
| 2440 | return std::make_pair(Last, FirstDecl); |
| 2441 | } |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2442 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2443 | PathDiagnosticPiece* CFRefReport::getEndPath(BugReporter& BR, |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2444 | ExplodedNode<ValueState>* EndN) { |
Ted Kremenek | 8695365 | 2008-05-22 23:45:19 +0000 | [diff] [blame] | 2445 | |
| 2446 | // Tell the BugReporter to report cases when the tracked symbol is |
| 2447 | // assigned to different variables, etc. |
Ted Kremenek | ba1c7ed | 2008-07-02 21:24:01 +0000 | [diff] [blame] | 2448 | cast<GRBugReporter>(BR).addNotableSymbol(Sym); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2449 | |
| 2450 | if (!getBugType().isLeak()) |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2451 | return RangedBugReport::getEndPath(BR, EndN); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2452 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2453 | typedef CFRefCount::RefBindings RefBindings; |
| 2454 | |
| 2455 | // Get the retain count. |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2456 | |
Ted Kremenek | 6064a36 | 2008-07-07 16:21:19 +0000 | [diff] [blame] | 2457 | unsigned long RetCount = |
| 2458 | CFRefCount::GetRefBindings(*EndN->getState()).lookup(Sym)->getCount(); |
| 2459 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2460 | // We are a leak. Walk up the graph to get to the first node where the |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2461 | // symbol appeared, and also get the first VarDecl that tracked object |
| 2462 | // is stored to. |
| 2463 | |
| 2464 | ExplodedNode<ValueState>* AllocNode = 0; |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2465 | VarDecl* FirstDecl = 0; |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2466 | llvm::tie(AllocNode, FirstDecl) = GetAllocationSite(EndN, Sym); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2467 | |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2468 | // Get the allocate site. |
| 2469 | assert (AllocNode); |
| 2470 | Stmt* FirstStmt = cast<PostStmt>(AllocNode->getLocation()).getStmt(); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2471 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2472 | SourceManager& SMgr = BR.getContext().getSourceManager(); |
| 2473 | unsigned AllocLine = SMgr.getLogicalLineNumber(FirstStmt->getLocStart()); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2474 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2475 | // Get the leak site. We may have multiple ExplodedNodes (one with the |
| 2476 | // leak) that occur on the same line number; if the node with the leak |
| 2477 | // has any immediate predecessor nodes with the same line number, find |
| 2478 | // any transitive-successors that have a different statement and use that |
| 2479 | // line number instead. This avoids emiting a diagnostic like: |
| 2480 | // |
| 2481 | // // 'y' is leaked. |
| 2482 | // int x = foo(y); |
| 2483 | // |
| 2484 | // instead we want: |
| 2485 | // |
| 2486 | // int x = foo(y); |
| 2487 | // // 'y' is leaked. |
| 2488 | |
| 2489 | Stmt* S = getStmt(BR); // This is the statement where the leak occured. |
| 2490 | assert (S); |
| 2491 | unsigned EndLine = SMgr.getLogicalLineNumber(S->getLocStart()); |
| 2492 | |
| 2493 | // Look in the *trimmed* graph at the immediate predecessor of EndN. Does |
| 2494 | // it occur on the same line? |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2495 | |
| 2496 | PathDiagnosticPiece::DisplayHint Hint = PathDiagnosticPiece::Above; |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2497 | |
| 2498 | assert (!EndN->pred_empty()); // Not possible to have 0 predecessors. |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2499 | ExplodedNode<ValueState> *Pred = *(EndN->pred_begin()); |
| 2500 | ProgramPoint PredPos = Pred->getLocation(); |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2501 | |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2502 | if (PostStmt* PredPS = dyn_cast<PostStmt>(&PredPos)) { |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2503 | |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2504 | Stmt* SPred = PredPS->getStmt(); |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2505 | |
| 2506 | // Predecessor at same line? |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2507 | if (SMgr.getLogicalLineNumber(SPred->getLocStart()) != EndLine) { |
| 2508 | Hint = PathDiagnosticPiece::Below; |
| 2509 | S = SPred; |
| 2510 | } |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2511 | } |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2512 | |
| 2513 | // Generate the diagnostic. |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2514 | FullSourceLoc L( S->getLocStart(), SMgr); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2515 | std::ostringstream os; |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2516 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2517 | os << "Object allocated on line " << AllocLine; |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2518 | |
| 2519 | if (FirstDecl) |
| 2520 | os << " and stored into '" << FirstDecl->getName() << '\''; |
| 2521 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2522 | os << " is no longer referenced after this point and has a retain count of +" |
| 2523 | << RetCount << " (object leaked)."; |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2524 | |
Ted Kremenek | 4c47932 | 2008-05-06 23:07:13 +0000 | [diff] [blame] | 2525 | return new PathDiagnosticPiece(L, os.str(), Hint); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2526 | } |
| 2527 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2528 | void UseAfterRelease::EmitWarnings(BugReporter& BR) { |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2529 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2530 | for (CFRefCount::use_after_iterator I = TF.use_after_begin(), |
| 2531 | E = TF.use_after_end(); I != E; ++I) { |
| 2532 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2533 | CFRefReport report(*this, I->first, I->second.second); |
| 2534 | report.addRange(I->second.first->getSourceRange()); |
Ted Kremenek | 270ab7d | 2008-04-18 01:56:37 +0000 | [diff] [blame] | 2535 | BR.EmitWarning(report); |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2536 | } |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2537 | } |
| 2538 | |
| 2539 | void BadRelease::EmitWarnings(BugReporter& BR) { |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2540 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2541 | for (CFRefCount::bad_release_iterator I = TF.bad_release_begin(), |
| 2542 | E = TF.bad_release_end(); I != E; ++I) { |
| 2543 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2544 | CFRefReport report(*this, I->first, I->second.second); |
| 2545 | report.addRange(I->second.first->getSourceRange()); |
| 2546 | BR.EmitWarning(report); |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2547 | } |
| 2548 | } |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2549 | |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 2550 | void Leak::EmitWarnings(BugReporter& BR) { |
| 2551 | |
| 2552 | for (CFRefCount::leaks_iterator I = TF.leaks_begin(), |
| 2553 | E = TF.leaks_end(); I != E; ++I) { |
| 2554 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2555 | std::vector<SymbolID>& SymV = *(I->second); |
| 2556 | unsigned n = SymV.size(); |
| 2557 | |
| 2558 | for (unsigned i = 0; i < n; ++i) { |
| 2559 | CFRefReport report(*this, I->first, SymV[i]); |
| 2560 | BR.EmitWarning(report); |
| 2561 | } |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 2562 | } |
| 2563 | } |
| 2564 | |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 2565 | void Leak::GetErrorNodes(std::vector<ExplodedNode<ValueState>*>& Nodes) { |
| 2566 | for (CFRefCount::leaks_iterator I=TF.leaks_begin(), E=TF.leaks_end(); |
| 2567 | I!=E; ++I) |
| 2568 | Nodes.push_back(I->first); |
| 2569 | } |
| 2570 | |
Ted Kremenek | d7e2678 | 2008-05-16 18:33:44 +0000 | [diff] [blame] | 2571 | bool Leak::isCached(BugReport& R) { |
| 2572 | |
| 2573 | // Most bug reports are cached at the location where they occured. |
| 2574 | // With leaks, we want to unique them by the location where they were |
| 2575 | // allocated, and only report only a single path. |
| 2576 | |
| 2577 | SymbolID Sym = static_cast<CFRefReport&>(R).getSymbol(); |
| 2578 | |
| 2579 | ExplodedNode<ValueState>* AllocNode = |
| 2580 | GetAllocationSite(R.getEndNode(), Sym).first; |
| 2581 | |
| 2582 | if (!AllocNode) |
| 2583 | return false; |
| 2584 | |
| 2585 | return BugTypeCacheLocation::isCached(AllocNode->getLocation()); |
| 2586 | } |
| 2587 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2588 | //===----------------------------------------------------------------------===// |
Ted Kremenek | b1983ba | 2008-04-10 22:16:52 +0000 | [diff] [blame] | 2589 | // Transfer function creation for external clients. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2590 | //===----------------------------------------------------------------------===// |
| 2591 | |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2592 | GRTransferFuncs* clang::MakeCFRefCountTF(ASTContext& Ctx, bool GCEnabled, |
| 2593 | const LangOptions& lopts) { |
Ted Kremenek | 9f20c7c | 2008-07-22 16:21:24 +0000 | [diff] [blame] | 2594 | return new CFRefCount(Ctx, GCEnabled, lopts); |
Ted Kremenek | a4c7429 | 2008-04-10 22:58:08 +0000 | [diff] [blame] | 2595 | } |