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" |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 23 | #include "llvm/ADT/DenseMap.h" |
| 24 | #include "llvm/ADT/FoldingSet.h" |
| 25 | #include "llvm/ADT/ImmutableMap.h" |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 26 | #include "llvm/Support/Compiler.h" |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 27 | #include <ostream> |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 28 | #include <sstream> |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 29 | |
| 30 | using namespace clang; |
| 31 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 32 | //===----------------------------------------------------------------------===// |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 33 | // Utility functions. |
| 34 | //===----------------------------------------------------------------------===// |
| 35 | |
Ted Kremenek | 1bd6ddb | 2008-05-01 18:31:44 +0000 | [diff] [blame] | 36 | static inline Selector GetNullarySelector(const char* name, ASTContext& Ctx) { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 37 | IdentifierInfo* II = &Ctx.Idents.get(name); |
| 38 | return Ctx.Selectors.getSelector(0, &II); |
| 39 | } |
| 40 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 41 | static inline Selector GetUnarySelector(const char* name, ASTContext& Ctx) { |
| 42 | IdentifierInfo* II = &Ctx.Idents.get(name); |
| 43 | return Ctx.Selectors.getSelector(1, &II); |
| 44 | } |
| 45 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 46 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 47 | // Symbolic Evaluation of Reference Counting Logic |
| 48 | //===----------------------------------------------------------------------===// |
| 49 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 50 | namespace { |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 51 | enum ArgEffect { IncRef, DecRef, DoNothing, StopTracking }; |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 52 | typedef std::vector<std::pair<unsigned,ArgEffect> > ArgEffects; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 53 | } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 54 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 55 | namespace llvm { |
| 56 | template <> struct FoldingSetTrait<ArgEffects> { |
Ted Kremenek | a4c7429 | 2008-04-10 22:58:08 +0000 | [diff] [blame] | 57 | static void Profile(const ArgEffects& X, FoldingSetNodeID& ID) { |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 58 | for (ArgEffects::const_iterator I = X.begin(), E = X.end(); I!= E; ++I) { |
| 59 | ID.AddInteger(I->first); |
| 60 | ID.AddInteger((unsigned) I->second); |
| 61 | } |
Ted Kremenek | a4c7429 | 2008-04-10 22:58:08 +0000 | [diff] [blame] | 62 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 63 | }; |
| 64 | } // end llvm namespace |
| 65 | |
| 66 | namespace { |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 67 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 68 | class RetEffect { |
| 69 | public: |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 70 | enum Kind { NoRet = 0x0, Alias = 0x1, OwnedSymbol = 0x2, |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 71 | NotOwnedSymbol = 0x3, ReceiverAlias=0x4 }; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 72 | |
| 73 | private: |
| 74 | unsigned Data; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 75 | RetEffect(Kind k, unsigned D) { Data = (D << 3) | (unsigned) k; } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 76 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 77 | public: |
| 78 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 79 | Kind getKind() const { return (Kind) (Data & 0x7); } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 80 | |
| 81 | unsigned getValue() const { |
| 82 | assert(getKind() == Alias); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 83 | return Data >> 3; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 84 | } |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 85 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 86 | static RetEffect MakeAlias(unsigned Idx) { return RetEffect(Alias, Idx); } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 87 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 88 | static RetEffect MakeReceiverAlias() { return RetEffect(ReceiverAlias, 0); } |
| 89 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 90 | static RetEffect MakeOwned() { return RetEffect(OwnedSymbol, 0); } |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 91 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 92 | static RetEffect MakeNotOwned() { return RetEffect(NotOwnedSymbol, 0); } |
| 93 | |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 94 | static RetEffect MakeNoRet() { return RetEffect(NoRet, 0); } |
| 95 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 96 | operator Kind() const { return getKind(); } |
| 97 | |
| 98 | void Profile(llvm::FoldingSetNodeID& ID) const { ID.AddInteger(Data); } |
| 99 | }; |
| 100 | |
| 101 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 102 | class RetainSummary : public llvm::FoldingSetNode { |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 103 | /// Args - an ordered vector of (index, ArgEffect) pairs, where index |
| 104 | /// specifies the argument (starting from 0). This can be sparsely |
| 105 | /// populated; arguments with no entry in Args use 'DefaultArgEffect'. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 106 | ArgEffects* Args; |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 107 | |
| 108 | /// DefaultArgEffect - The default ArgEffect to apply to arguments that |
| 109 | /// do not have an entry in Args. |
| 110 | ArgEffect DefaultArgEffect; |
| 111 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 112 | ArgEffect Receiver; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 113 | RetEffect Ret; |
| 114 | public: |
| 115 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 116 | RetainSummary(ArgEffects* A, RetEffect R, ArgEffect defaultEff, |
| 117 | ArgEffect ReceiverEff) |
| 118 | : Args(A), DefaultArgEffect(defaultEff), Receiver(ReceiverEff), Ret(R) {} |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 119 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 120 | ArgEffect getArg(unsigned idx) const { |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 121 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 122 | if (!Args) |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 123 | return DefaultArgEffect; |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 124 | |
| 125 | // If Args is present, it is likely to contain only 1 element. |
| 126 | // Just do a linear search. Do it from the back because functions with |
| 127 | // large numbers of arguments will be tail heavy with respect to which |
| 128 | // argument they actually modify with respect to the reference count. |
| 129 | |
| 130 | for (ArgEffects::reverse_iterator I=Args->rbegin(), E=Args->rend(); |
| 131 | I!=E; ++I) { |
| 132 | |
| 133 | if (idx > I->first) |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 134 | return DefaultArgEffect; |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 135 | |
| 136 | if (idx == I->first) |
| 137 | return I->second; |
| 138 | } |
| 139 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 140 | return DefaultArgEffect; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 141 | } |
| 142 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 143 | RetEffect getRetEffect() const { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 144 | return Ret; |
| 145 | } |
| 146 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 147 | ArgEffect getReceiverEffect() const { |
| 148 | return Receiver; |
| 149 | } |
| 150 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 151 | typedef ArgEffects::const_iterator arg_iterator; |
| 152 | |
| 153 | arg_iterator begin_args() const { return Args->begin(); } |
| 154 | arg_iterator end_args() const { return Args->end(); } |
| 155 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 156 | static void Profile(llvm::FoldingSetNodeID& ID, ArgEffects* A, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 157 | RetEffect RetEff, ArgEffect DefaultEff, |
| 158 | ArgEffect ReceiverEff) { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 159 | ID.AddPointer(A); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 160 | ID.Add(RetEff); |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 161 | ID.AddInteger((unsigned) DefaultEff); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 162 | ID.AddInteger((unsigned) ReceiverEff); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | void Profile(llvm::FoldingSetNodeID& ID) const { |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 166 | Profile(ID, Args, Ret, DefaultArgEffect, Receiver); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 167 | } |
| 168 | }; |
| 169 | |
| 170 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 171 | class RetainSummaryManager { |
| 172 | |
| 173 | //==-----------------------------------------------------------------==// |
| 174 | // Typedefs. |
| 175 | //==-----------------------------------------------------------------==// |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 176 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 177 | typedef llvm::FoldingSet<llvm::FoldingSetNodeWrapper<ArgEffects> > |
| 178 | ArgEffectsSetTy; |
| 179 | |
| 180 | typedef llvm::FoldingSet<RetainSummary> |
| 181 | SummarySetTy; |
| 182 | |
| 183 | typedef llvm::DenseMap<FunctionDecl*, RetainSummary*> |
| 184 | FuncSummariesTy; |
| 185 | |
| 186 | typedef llvm::DenseMap<Selector, RetainSummary*> |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 187 | ObjCMethSummariesTy; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 188 | |
| 189 | //==-----------------------------------------------------------------==// |
| 190 | // Data. |
| 191 | //==-----------------------------------------------------------------==// |
| 192 | |
| 193 | // Ctx - The ASTContext object for the analyzed ASTs. |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 194 | ASTContext& Ctx; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 195 | |
| 196 | // GCEnabled - Records whether or not the analyzed code runs in GC mode. |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 197 | const bool GCEnabled; |
| 198 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 199 | // SummarySet - A FoldingSet of uniqued summaries. |
Ted Kremenek | a4c7429 | 2008-04-10 22:58:08 +0000 | [diff] [blame] | 200 | SummarySetTy SummarySet; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 201 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 202 | // FuncSummaries - A map from FunctionDecls to summaries. |
| 203 | FuncSummariesTy FuncSummaries; |
| 204 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 205 | // ObjCInstMethSummaries - A map from selectors (for instance methods) |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 206 | // to summaries. |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 207 | ObjCMethSummariesTy ObjCInstMethSummaries; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 208 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 209 | // ObjCMethSummaries - A map from selectors to summaries. |
| 210 | ObjCMethSummariesTy ObjCMethSummaries; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 211 | |
| 212 | // ArgEffectsSet - A FoldingSet of uniqued ArgEffects. |
| 213 | ArgEffectsSetTy ArgEffectsSet; |
| 214 | |
| 215 | // BPAlloc - A BumpPtrAllocator used for allocating summaries, ArgEffects, |
| 216 | // and all other data used by the checker. |
| 217 | llvm::BumpPtrAllocator BPAlloc; |
| 218 | |
| 219 | // ScratchArgs - A holding buffer for construct ArgEffects. |
| 220 | ArgEffects ScratchArgs; |
| 221 | |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 222 | RetainSummary* StopSummary; |
| 223 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 224 | //==-----------------------------------------------------------------==// |
| 225 | // Methods. |
| 226 | //==-----------------------------------------------------------------==// |
| 227 | |
| 228 | // getArgEffects - Returns a persistent ArgEffects object based on the |
| 229 | // data in ScratchArgs. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 230 | ArgEffects* getArgEffects(); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 231 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 232 | enum UnaryFuncKind { cfretain, cfrelease, cfmakecollectable }; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 233 | RetainSummary* getUnarySummary(FunctionDecl* FD, UnaryFuncKind func); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 234 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 235 | RetainSummary* getNSSummary(FunctionDecl* FD, const char* FName); |
| 236 | RetainSummary* getCFSummary(FunctionDecl* FD, const char* FName); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 237 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 238 | RetainSummary* getCFSummaryCreateRule(FunctionDecl* FD); |
| 239 | RetainSummary* getCFSummaryGetRule(FunctionDecl* FD); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 240 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 241 | RetainSummary* getPersistentSummary(ArgEffects* AE, RetEffect RetEff, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 242 | ArgEffect ReceiverEff = DoNothing, |
| 243 | ArgEffect DefaultEff = DoNothing); |
| 244 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 245 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 246 | RetainSummary* getPersistentSummary(RetEffect RE, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 247 | ArgEffect ReceiverEff = DoNothing, |
| 248 | ArgEffect DefaultEff = DoNothing) { |
| 249 | return getPersistentSummary(getArgEffects(), RE, ReceiverEff, DefaultEff); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 250 | } |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 251 | |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 252 | |
| 253 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 254 | RetainSummary* getPersistentStopSummary() { |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 255 | if (StopSummary) |
| 256 | return StopSummary; |
| 257 | |
| 258 | StopSummary = getPersistentSummary(RetEffect::MakeNoRet(), |
| 259 | StopTracking, StopTracking); |
| 260 | |
| 261 | return StopSummary; |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 262 | } |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 263 | |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 264 | RetainSummary* getInitMethodSummary(Selector S); |
| 265 | |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 266 | void InitializeInstMethSummaries(); |
| 267 | void InitializeMethSummaries(); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 268 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 269 | public: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 270 | |
| 271 | RetainSummaryManager(ASTContext& ctx, bool gcenabled) |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 272 | : Ctx(ctx), GCEnabled(gcenabled), StopSummary(0) { |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 273 | |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 274 | InitializeInstMethSummaries(); |
| 275 | InitializeMethSummaries(); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 276 | } |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 277 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 278 | ~RetainSummaryManager(); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 279 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 280 | RetainSummary* getSummary(FunctionDecl* FD, ASTContext& Ctx); |
| 281 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 282 | RetainSummary* getMethodSummary(ObjCMessageExpr* ME); |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 283 | RetainSummary* getInstanceMethodSummary(IdentifierInfo* ClsName, Selector S); |
| 284 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 285 | bool isGCEnabled() const { return GCEnabled; } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 286 | }; |
| 287 | |
| 288 | } // end anonymous namespace |
| 289 | |
| 290 | //===----------------------------------------------------------------------===// |
| 291 | // Implementation of checker data structures. |
| 292 | //===----------------------------------------------------------------------===// |
| 293 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 294 | RetainSummaryManager::~RetainSummaryManager() { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 295 | |
| 296 | // FIXME: The ArgEffects could eventually be allocated from BPAlloc, |
| 297 | // mitigating the need to do explicit cleanup of the |
| 298 | // Argument-Effect summaries. |
| 299 | |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 300 | for (ArgEffectsSetTy::iterator I = ArgEffectsSet.begin(), |
| 301 | E = ArgEffectsSet.end(); I!=E; ++I) |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 302 | I->getValue().~ArgEffects(); |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 303 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 304 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 305 | ArgEffects* RetainSummaryManager::getArgEffects() { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 306 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 307 | if (ScratchArgs.empty()) |
| 308 | return NULL; |
| 309 | |
| 310 | // Compute a profile for a non-empty ScratchArgs. |
| 311 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 312 | llvm::FoldingSetNodeID profile; |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 313 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 314 | profile.Add(ScratchArgs); |
| 315 | void* InsertPos; |
| 316 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 317 | // Look up the uniqued copy, or create a new one. |
| 318 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 319 | llvm::FoldingSetNodeWrapper<ArgEffects>* E = |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 320 | ArgEffectsSet.FindNodeOrInsertPos(profile, InsertPos); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 321 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 322 | if (E) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 323 | ScratchArgs.clear(); |
| 324 | return &E->getValue(); |
| 325 | } |
| 326 | |
| 327 | E = (llvm::FoldingSetNodeWrapper<ArgEffects>*) |
| 328 | BPAlloc.Allocate<llvm::FoldingSetNodeWrapper<ArgEffects> >(); |
| 329 | |
| 330 | new (E) llvm::FoldingSetNodeWrapper<ArgEffects>(ScratchArgs); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 331 | ArgEffectsSet.InsertNode(E, InsertPos); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 332 | |
| 333 | ScratchArgs.clear(); |
| 334 | return &E->getValue(); |
| 335 | } |
| 336 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 337 | RetainSummary* |
| 338 | RetainSummaryManager::getPersistentSummary(ArgEffects* AE, RetEffect RetEff, |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 339 | ArgEffect ReceiverEff, |
| 340 | ArgEffect DefaultEff) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 341 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 342 | // Generate a profile for the summary. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 343 | llvm::FoldingSetNodeID profile; |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 344 | RetainSummary::Profile(profile, AE, RetEff, DefaultEff, ReceiverEff); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 345 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 346 | // Look up the uniqued summary, or create one if it doesn't exist. |
| 347 | void* InsertPos; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 348 | RetainSummary* Summ = SummarySet.FindNodeOrInsertPos(profile, InsertPos); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 349 | |
| 350 | if (Summ) |
| 351 | return Summ; |
| 352 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 353 | // Create the summary and return it. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 354 | Summ = (RetainSummary*) BPAlloc.Allocate<RetainSummary>(); |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 355 | new (Summ) RetainSummary(AE, RetEff, DefaultEff, ReceiverEff); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 356 | SummarySet.InsertNode(Summ, InsertPos); |
| 357 | |
| 358 | return Summ; |
| 359 | } |
| 360 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 361 | //===----------------------------------------------------------------------===// |
| 362 | // Summary creation for functions (largely uses of Core Foundation). |
| 363 | //===----------------------------------------------------------------------===// |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 364 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 365 | RetainSummary* RetainSummaryManager::getSummary(FunctionDecl* FD, |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 366 | ASTContext& Ctx) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 367 | |
| 368 | SourceLocation Loc = FD->getLocation(); |
| 369 | |
| 370 | if (!Loc.isFileID()) |
| 371 | return NULL; |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 372 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 373 | // Look up a summary in our cache of FunctionDecls -> Summaries. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 374 | FuncSummariesTy::iterator I = FuncSummaries.find(FD); |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 375 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 376 | if (I != FuncSummaries.end()) |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 377 | return I->second; |
| 378 | |
| 379 | // No summary. Generate one. |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 380 | const char* FName = FD->getIdentifier()->getName(); |
| 381 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 382 | RetainSummary *S = 0; |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 383 | |
| 384 | if (FName[0] == 'C' && FName[1] == 'F') |
| 385 | S = getCFSummary(FD, FName); |
| 386 | else if (FName[0] == 'N' && FName[1] == 'S') |
| 387 | S = getNSSummary(FD, FName); |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 388 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 389 | FuncSummaries[FD] = S; |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 390 | return S; |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 391 | } |
| 392 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 393 | RetainSummary* RetainSummaryManager::getNSSummary(FunctionDecl* FD, |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 394 | const char* FName) { |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 395 | FName += 2; |
| 396 | |
| 397 | if (strcmp(FName, "MakeCollectable") == 0) |
| 398 | return getUnarySummary(FD, cfmakecollectable); |
| 399 | |
| 400 | return 0; |
| 401 | } |
| 402 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 403 | RetainSummary* RetainSummaryManager::getCFSummary(FunctionDecl* FD, |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 404 | const char* FName) { |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 405 | |
| 406 | FName += 2; |
| 407 | |
| 408 | if (strcmp(FName, "Retain") == 0) |
| 409 | return getUnarySummary(FD, cfretain); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 410 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 411 | if (strcmp(FName, "Release") == 0) |
| 412 | return getUnarySummary(FD, cfrelease); |
| 413 | |
| 414 | if (strcmp(FName, "MakeCollectable") == 0) |
| 415 | return getUnarySummary(FD, cfmakecollectable); |
| 416 | |
| 417 | if (strstr(FName, "Create") || strstr(FName, "Copy")) |
| 418 | return getCFSummaryCreateRule(FD); |
| 419 | |
| 420 | if (strstr(FName, "Get")) |
| 421 | return getCFSummaryGetRule(FD); |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 426 | RetainSummary* |
| 427 | RetainSummaryManager::getUnarySummary(FunctionDecl* FD, UnaryFuncKind func) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 428 | |
| 429 | FunctionTypeProto* FT = |
| 430 | dyn_cast<FunctionTypeProto>(FD->getType().getTypePtr()); |
| 431 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 432 | if (FT) { |
| 433 | |
| 434 | if (FT->getNumArgs() != 1) |
| 435 | return 0; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 436 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 437 | TypedefType* ArgT = dyn_cast<TypedefType>(FT->getArgType(0).getTypePtr()); |
| 438 | |
| 439 | if (!ArgT) |
| 440 | return 0; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 441 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 442 | if (!ArgT->isPointerType()) |
| 443 | return NULL; |
| 444 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 445 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 446 | assert (ScratchArgs.empty()); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 447 | |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 448 | switch (func) { |
| 449 | case cfretain: { |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 450 | ScratchArgs.push_back(std::make_pair(0, IncRef)); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 451 | return getPersistentSummary(RetEffect::MakeAlias(0)); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | case cfrelease: { |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 455 | ScratchArgs.push_back(std::make_pair(0, DecRef)); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 456 | return getPersistentSummary(RetEffect::MakeNoRet()); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | case cfmakecollectable: { |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 460 | if (GCEnabled) |
| 461 | ScratchArgs.push_back(std::make_pair(0, DecRef)); |
| 462 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 463 | return getPersistentSummary(RetEffect::MakeAlias(0)); |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | default: |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 467 | assert (false && "Not a supported unary function."); |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 468 | } |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | static bool isCFRefType(QualType T) { |
| 472 | |
| 473 | if (!T->isPointerType()) |
| 474 | return false; |
| 475 | |
| 476 | // Check the typedef for the name "CF" and the substring "Ref". |
| 477 | |
| 478 | TypedefType* TD = dyn_cast<TypedefType>(T.getTypePtr()); |
| 479 | |
| 480 | if (!TD) |
| 481 | return false; |
| 482 | |
| 483 | const char* TDName = TD->getDecl()->getIdentifier()->getName(); |
| 484 | assert (TDName); |
| 485 | |
| 486 | if (TDName[0] != 'C' || TDName[1] != 'F') |
| 487 | return false; |
| 488 | |
| 489 | if (strstr(TDName, "Ref") == 0) |
| 490 | return false; |
| 491 | |
| 492 | return true; |
| 493 | } |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 494 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 495 | static bool isNSType(QualType T) { |
| 496 | |
| 497 | if (!T->isPointerType()) |
| 498 | return false; |
| 499 | |
| 500 | // Check the typedef for the name "CF" and the substring "Ref". |
| 501 | |
| 502 | TypedefType* TD = dyn_cast<TypedefType>(T.getTypePtr()); |
| 503 | |
| 504 | if (!TD) |
| 505 | return false; |
| 506 | |
| 507 | const char* TDName = TD->getDecl()->getIdentifier()->getName(); |
| 508 | assert (TDName); |
| 509 | |
| 510 | if (TDName[0] != 'N' || TDName[1] != 'S') |
| 511 | return false; |
| 512 | |
| 513 | return true; |
| 514 | } |
| 515 | |
| 516 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 517 | RetainSummary* RetainSummaryManager::getCFSummaryCreateRule(FunctionDecl* FD) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 518 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 519 | FunctionTypeProto* FT = |
| 520 | dyn_cast<FunctionTypeProto>(FD->getType().getTypePtr()); |
| 521 | |
| 522 | if (FT && !isCFRefType(FT->getResultType())) |
| 523 | return 0; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 524 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 525 | // FIXME: Add special-cases for functions that retain/release. For now |
| 526 | // just handle the default case. |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 527 | |
| 528 | assert (ScratchArgs.empty()); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 529 | return getPersistentSummary(RetEffect::MakeOwned()); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 530 | } |
| 531 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 532 | RetainSummary* RetainSummaryManager::getCFSummaryGetRule(FunctionDecl* FD) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 533 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 534 | FunctionTypeProto* FT = |
| 535 | dyn_cast<FunctionTypeProto>(FD->getType().getTypePtr()); |
Ted Kremenek | d4244d4 | 2008-04-11 20:11:19 +0000 | [diff] [blame] | 536 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 537 | if (FT) { |
| 538 | QualType RetTy = FT->getResultType(); |
Ted Kremenek | d4244d4 | 2008-04-11 20:11:19 +0000 | [diff] [blame] | 539 | |
Ted Kremenek | 562c130 | 2008-05-05 16:51:50 +0000 | [diff] [blame] | 540 | // FIXME: For now we assume that all pointer types returned are referenced |
| 541 | // counted. Since this is the "Get" rule, we assume non-ownership, which |
| 542 | // works fine for things that are not reference counted. We do this because |
| 543 | // some generic data structures return "void*". We need something better |
| 544 | // in the future. |
| 545 | |
| 546 | if (!isCFRefType(RetTy) && !RetTy->isPointerType()) |
| 547 | return 0; |
| 548 | } |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 549 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 550 | // FIXME: Add special-cases for functions that retain/release. For now |
| 551 | // just handle the default case. |
| 552 | |
Ted Kremenek | ae855d4 | 2008-04-24 17:22:33 +0000 | [diff] [blame] | 553 | assert (ScratchArgs.empty()); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 554 | return getPersistentSummary(RetEffect::MakeNotOwned()); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 555 | } |
| 556 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 557 | //===----------------------------------------------------------------------===// |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 558 | // Summary creation for Selectors. |
| 559 | //===----------------------------------------------------------------------===// |
| 560 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 561 | RetainSummary* |
| 562 | RetainSummaryManager::getInitMethodSummary(Selector S) { |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 563 | assert(ScratchArgs.empty()); |
| 564 | |
| 565 | RetainSummary* Summ = |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 566 | getPersistentSummary(RetEffect::MakeReceiverAlias()); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 567 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 568 | ObjCMethSummaries[S] = Summ; |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 569 | return Summ; |
| 570 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 571 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 572 | RetainSummary* |
| 573 | RetainSummaryManager::getMethodSummary(ObjCMessageExpr* ME) { |
| 574 | |
| 575 | Selector S = ME->getSelector(); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 576 | |
| 577 | // Look up a summary in our cache of Selectors -> Summaries. |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 578 | ObjCMethSummariesTy::iterator I = ObjCMethSummaries.find(S); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 579 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 580 | if (I != ObjCMethSummaries.end()) |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 581 | return I->second; |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 582 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 583 | // Only generate real summaries for methods involving |
| 584 | // NSxxxx objects. |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 585 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 586 | if (!isNSType(ME->getReceiver()->getType())) { |
| 587 | RetainSummary* Summ = getPersistentStopSummary(); |
| 588 | ObjCMethSummaries[S] = Summ; |
| 589 | return Summ; |
| 590 | } |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 591 | |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 592 | // "initXXX": pass-through for receiver. |
| 593 | |
| 594 | const char* s = S.getIdentifierInfoForSlot(0)->getName(); |
Ted Kremenek | 1d3d956 | 2008-05-06 06:09:09 +0000 | [diff] [blame] | 595 | |
Ted Kremenek | bcfac33 | 2008-05-06 06:17:42 +0000 | [diff] [blame] | 596 | if (strncmp(s, "init", 4) == 0) |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 597 | return getInitMethodSummary(S); |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 598 | |
| 599 | #if 0 |
| 600 | // Generate a summary. For all "setYYY:" and "addXXX:" slots => StopTracking. |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 601 | |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 602 | assert (ScratchArgs.empty()); |
| 603 | |
| 604 | if (S.isUnarySelector()) { |
| 605 | RetainSummary* Summ = getPersistentSummary(RetEffect::MakeNoRet()); |
| 606 | return Summ; |
| 607 | } |
| 608 | |
| 609 | for (unsigned i = 0, e = ME->getNumArgs(); i!=e; ++i) { |
| 610 | IdentifierInfo *II = S.getIdentifierInfoForSlot(i); |
| 611 | const char* s = II->getName(); |
| 612 | |
| 613 | if (strncmp(s, "set", 3) == 0 || strncmp(s, "add", 3) == 0) |
| 614 | ScratchArgs.push_back(std::make_pair(i, StopTracking)); |
| 615 | |
| 616 | |
| 617 | } |
| 618 | #endif |
| 619 | |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 620 | return 0; |
| 621 | } |
| 622 | |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 623 | void RetainSummaryManager::InitializeInstMethSummaries() { |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 624 | |
| 625 | assert (ScratchArgs.empty()); |
| 626 | |
| 627 | RetEffect E = isGCEnabled() ? RetEffect::MakeNoRet() : RetEffect::MakeOwned(); |
| 628 | RetainSummary* Summ = getPersistentSummary(E); |
| 629 | |
| 630 | // Create the "alloc" selector. |
| 631 | ObjCInstMethSummaries[ GetNullarySelector("alloc", Ctx) ] = Summ; |
| 632 | |
| 633 | // Create the "new" selector. |
| 634 | ObjCInstMethSummaries[ GetNullarySelector("new", Ctx) ] = Summ; |
| 635 | |
| 636 | // Create the "allocWithZone:" selector. |
| 637 | ObjCInstMethSummaries[ GetUnarySelector("allocWithZone", Ctx) ] = Summ; |
| 638 | |
| 639 | // Create the "copyWithZone:" selector. |
| 640 | ObjCInstMethSummaries[ GetUnarySelector("copyWithZone", Ctx) ] = Summ; |
| 641 | |
| 642 | // Create the "mutableCopyWithZone:" selector. |
| 643 | ObjCInstMethSummaries[ GetUnarySelector("mutableCopyWithZone", Ctx) ] = Summ; |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 644 | |
| 645 | // Special cases: create the NSProcessInfo::processInfo selector. |
| 646 | ObjCInstMethSummaries[ GetNullarySelector("processInfo", Ctx) ] = |
| 647 | getPersistentSummary(RetEffect::MakeNoRet()); |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 648 | } |
| 649 | |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 650 | void RetainSummaryManager::InitializeMethSummaries() { |
| 651 | |
| 652 | assert (ScratchArgs.empty()); |
| 653 | |
| 654 | // Create the "init" selector. |
| 655 | RetainSummary* Summ = getPersistentSummary(RetEffect::MakeReceiverAlias()); |
| 656 | ObjCMethSummaries[ GetNullarySelector("init", Ctx) ] = Summ; |
| 657 | |
| 658 | // Create the "copy" selector. |
| 659 | RetEffect E = isGCEnabled() ? RetEffect::MakeNoRet() : RetEffect::MakeOwned(); |
| 660 | Summ = getPersistentSummary(E); |
| 661 | ObjCMethSummaries[ GetNullarySelector("copy", Ctx) ] = Summ; |
| 662 | |
| 663 | // Create the "mutableCopy" selector. |
| 664 | ObjCMethSummaries[ GetNullarySelector("mutableCopy", Ctx) ] = Summ; |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 665 | |
| 666 | // Create the "retain" selector. |
| 667 | E = RetEffect::MakeReceiverAlias(); |
| 668 | Summ = getPersistentSummary(E, isGCEnabled() ? DoNothing : IncRef); |
| 669 | ObjCMethSummaries[ GetNullarySelector("retain", Ctx) ] = Summ; |
| 670 | |
| 671 | // Create the "release" selector. |
| 672 | Summ = getPersistentSummary(E, isGCEnabled() ? DoNothing : DecRef); |
| 673 | ObjCMethSummaries[ GetNullarySelector("release", Ctx) ] = Summ; |
| 674 | |
| 675 | // Create the "autorelease" selector. |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 676 | Summ = getPersistentSummary(E, isGCEnabled() ? DoNothing : StopTracking); |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 677 | ObjCMethSummaries[ GetNullarySelector("autorelease", Ctx) ] = Summ; |
Ted Kremenek | 83b2cde | 2008-05-06 00:38:54 +0000 | [diff] [blame] | 678 | } |
| 679 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 680 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 681 | RetainSummary* |
| 682 | RetainSummaryManager::getInstanceMethodSummary(IdentifierInfo* ClsName, |
| 683 | Selector S) { |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 684 | |
| 685 | // Look up a summary in our cache of Selectors -> Summaries. |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 686 | ObjCMethSummariesTy::iterator I = ObjCInstMethSummaries.find(S); |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 687 | |
Ted Kremenek | 0e344d4 | 2008-05-06 00:30:21 +0000 | [diff] [blame] | 688 | if (I != ObjCInstMethSummaries.end()) |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 689 | return I->second; |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 690 | |
| 691 | // Don't track anything if using GC. |
| 692 | if (isGCEnabled()) |
| 693 | return 0; |
| 694 | |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 695 | // Only generate real summaries for NSXXX classes. |
| 696 | |
| 697 | const char* cls = ClsName->getName(); |
| 698 | |
| 699 | if (cls[0] != 'N' || cls[1] != 'S') |
| 700 | return getPersistentStopSummary(); |
| 701 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 702 | // Heuristic: XXXXwithYYYY, where XXX is the class name with the "NS" |
| 703 | // stripped off is usually an allocation. |
| 704 | |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 705 | const char* s = S.getIdentifierInfoForSlot(0)->getName(); |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 706 | |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 707 | cls += 2; |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 708 | |
| 709 | if (cls[0] == '\0' || s[0] == '\0' || tolower(cls[0]) != s[0]) |
| 710 | return 0; |
| 711 | |
| 712 | ++cls; |
| 713 | ++s; |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 714 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 715 | // Now look at the rest of the characters. |
| 716 | unsigned len = strlen(cls); |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 717 | |
| 718 | // Prefix matches? |
Ted Kremenek | bcfac33 | 2008-05-06 06:17:42 +0000 | [diff] [blame] | 719 | if (strncmp(cls, s, len) != 0) |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 720 | return 0; |
| 721 | |
| 722 | s += len; |
| 723 | |
| 724 | // If 's' is the same as clsName, or 's' has "With" after the class name, |
| 725 | // treat it as an allocator. |
| 726 | do { |
| 727 | |
| 728 | if (s[0] == '\0') |
| 729 | break; |
| 730 | |
Ted Kremenek | bcfac33 | 2008-05-06 06:17:42 +0000 | [diff] [blame] | 731 | if (strncmp(s, "With", 4) == 0) |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 732 | break; |
| 733 | |
| 734 | return 0; |
| 735 | |
| 736 | } while(0); |
| 737 | |
| 738 | // Generate the summary. |
| 739 | |
| 740 | assert (ScratchArgs.empty()); |
| 741 | RetainSummary* Summ = getPersistentSummary(RetEffect::MakeOwned()); |
| 742 | ObjCInstMethSummaries[S] = Summ; |
| 743 | return Summ; |
Ted Kremenek | 42ea032 | 2008-05-05 23:55:01 +0000 | [diff] [blame] | 744 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 745 | |
| 746 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 747 | // Reference-counting logic (typestate + counts). |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 748 | //===----------------------------------------------------------------------===// |
| 749 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 750 | namespace { |
| 751 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 752 | class VISIBILITY_HIDDEN RefVal { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 753 | public: |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 754 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 755 | enum Kind { |
| 756 | Owned = 0, // Owning reference. |
| 757 | NotOwned, // Reference is not owned by still valid (not freed). |
| 758 | Released, // Object has been released. |
| 759 | ReturnedOwned, // Returned object passes ownership to caller. |
| 760 | ReturnedNotOwned, // Return object does not pass ownership to caller. |
| 761 | ErrorUseAfterRelease, // Object used after released. |
| 762 | ErrorReleaseNotOwned, // Release of an object that was not owned. |
| 763 | ErrorLeak // A memory leak due to excessive reference counts. |
| 764 | }; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 765 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 766 | private: |
| 767 | |
| 768 | Kind kind; |
| 769 | unsigned Cnt; |
| 770 | |
| 771 | RefVal(Kind k, unsigned cnt) : kind(k), Cnt(cnt) {} |
| 772 | |
| 773 | RefVal(Kind k) : kind(k), Cnt(0) {} |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 774 | |
| 775 | public: |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 776 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 777 | Kind getKind() const { return kind; } |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 778 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 779 | unsigned getCount() const { return Cnt; } |
| 780 | |
| 781 | // Useful predicates. |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 782 | |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 783 | static bool isError(Kind k) { return k >= ErrorUseAfterRelease; } |
| 784 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 785 | static bool isLeak(Kind k) { return k == ErrorLeak; } |
| 786 | |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 787 | bool isOwned() const { |
| 788 | return getKind() == Owned; |
| 789 | } |
| 790 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 791 | bool isNotOwned() const { |
| 792 | return getKind() == NotOwned; |
| 793 | } |
| 794 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 795 | bool isReturnedOwned() const { |
| 796 | return getKind() == ReturnedOwned; |
| 797 | } |
| 798 | |
| 799 | bool isReturnedNotOwned() const { |
| 800 | return getKind() == ReturnedNotOwned; |
| 801 | } |
| 802 | |
| 803 | bool isNonLeakError() const { |
| 804 | Kind k = getKind(); |
| 805 | return isError(k) && !isLeak(k); |
| 806 | } |
| 807 | |
| 808 | // State creation: normal state. |
| 809 | |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 810 | static RefVal makeOwned(unsigned Count = 0) { |
| 811 | return RefVal(Owned, Count); |
| 812 | } |
| 813 | |
| 814 | static RefVal makeNotOwned(unsigned Count = 0) { |
| 815 | return RefVal(NotOwned, Count); |
| 816 | } |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 817 | |
| 818 | static RefVal makeReturnedOwned(unsigned Count) { |
| 819 | return RefVal(ReturnedOwned, Count); |
| 820 | } |
| 821 | |
| 822 | static RefVal makeReturnedNotOwned() { |
| 823 | return RefVal(ReturnedNotOwned); |
| 824 | } |
| 825 | |
| 826 | // State creation: errors. |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 827 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 828 | static RefVal makeLeak(unsigned Count) { return RefVal(ErrorLeak, Count); } |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 829 | static RefVal makeReleased() { return RefVal(Released); } |
| 830 | static RefVal makeUseAfterRelease() { return RefVal(ErrorUseAfterRelease); } |
| 831 | static RefVal makeReleaseNotOwned() { return RefVal(ErrorReleaseNotOwned); } |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 832 | |
| 833 | // Comparison, profiling, and pretty-printing. |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 834 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 835 | bool operator==(const RefVal& X) const { |
| 836 | return kind == X.kind && Cnt == X.Cnt; |
| 837 | } |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 838 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 839 | void Profile(llvm::FoldingSetNodeID& ID) const { |
| 840 | ID.AddInteger((unsigned) kind); |
| 841 | ID.AddInteger(Cnt); |
| 842 | } |
| 843 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 844 | void print(std::ostream& Out) const; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 845 | }; |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 846 | |
| 847 | void RefVal::print(std::ostream& Out) const { |
| 848 | switch (getKind()) { |
| 849 | default: assert(false); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 850 | case Owned: { |
| 851 | Out << "Owned"; |
| 852 | unsigned cnt = getCount(); |
| 853 | if (cnt) Out << " (+ " << cnt << ")"; |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 854 | break; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 855 | } |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 856 | |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 857 | case NotOwned: { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 858 | Out << "NotOwned"; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 859 | unsigned cnt = getCount(); |
| 860 | if (cnt) Out << " (+ " << cnt << ")"; |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 861 | break; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 862 | } |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 863 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 864 | case ReturnedOwned: { |
| 865 | Out << "ReturnedOwned"; |
| 866 | unsigned cnt = getCount(); |
| 867 | if (cnt) Out << " (+ " << cnt << ")"; |
| 868 | break; |
| 869 | } |
| 870 | |
| 871 | case ReturnedNotOwned: { |
| 872 | Out << "ReturnedNotOwned"; |
| 873 | unsigned cnt = getCount(); |
| 874 | if (cnt) Out << " (+ " << cnt << ")"; |
| 875 | break; |
| 876 | } |
| 877 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 878 | case Released: |
| 879 | Out << "Released"; |
| 880 | break; |
| 881 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 882 | case ErrorLeak: |
| 883 | Out << "Leaked"; |
| 884 | break; |
| 885 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 886 | case ErrorUseAfterRelease: |
| 887 | Out << "Use-After-Release [ERROR]"; |
| 888 | break; |
| 889 | |
| 890 | case ErrorReleaseNotOwned: |
| 891 | Out << "Release of Not-Owned [ERROR]"; |
| 892 | break; |
| 893 | } |
| 894 | } |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 895 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 896 | static inline unsigned GetCount(RefVal V) { |
| 897 | switch (V.getKind()) { |
| 898 | default: |
| 899 | return V.getCount(); |
| 900 | |
| 901 | case RefVal::Owned: |
| 902 | return V.getCount()+1; |
| 903 | } |
| 904 | } |
| 905 | |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 906 | //===----------------------------------------------------------------------===// |
| 907 | // Transfer functions. |
| 908 | //===----------------------------------------------------------------------===// |
| 909 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 910 | class VISIBILITY_HIDDEN CFRefCount : public GRSimpleVals { |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 911 | public: |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 912 | // Type definitions. |
| 913 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 914 | typedef llvm::ImmutableMap<SymbolID, RefVal> RefBindings; |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 915 | typedef RefBindings::Factory RefBFactoryTy; |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 916 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 917 | typedef llvm::DenseMap<GRExprEngine::NodeTy*,std::pair<Expr*, SymbolID> > |
| 918 | ReleasesNotOwnedTy; |
| 919 | |
| 920 | typedef ReleasesNotOwnedTy UseAfterReleasesTy; |
| 921 | |
| 922 | typedef llvm::DenseMap<GRExprEngine::NodeTy*, std::vector<SymbolID>*> |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 923 | LeaksTy; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 924 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 925 | class BindingsPrinter : public ValueState::CheckerStatePrinter { |
| 926 | public: |
| 927 | virtual void PrintCheckerState(std::ostream& Out, void* State, |
| 928 | const char* nl, const char* sep); |
| 929 | }; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 930 | |
| 931 | private: |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 932 | // Instance variables. |
| 933 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 934 | RetainSummaryManager Summaries; |
| 935 | const bool EmitStandardWarnings; |
| 936 | const LangOptions& LOpts; |
| 937 | RefBFactoryTy RefBFactory; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 938 | |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 939 | UseAfterReleasesTy UseAfterReleases; |
| 940 | ReleasesNotOwnedTy ReleasesNotOwned; |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 941 | LeaksTy Leaks; |
Ted Kremenek | 1daa16c | 2008-03-11 18:14:09 +0000 | [diff] [blame] | 942 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 943 | BindingsPrinter Printer; |
| 944 | |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 945 | Selector RetainSelector; |
| 946 | Selector ReleaseSelector; |
Ted Kremenek | 3281a1f | 2008-05-01 02:18:37 +0000 | [diff] [blame] | 947 | Selector AutoreleaseSelector; |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 948 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 949 | public: |
| 950 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 951 | static RefBindings GetRefBindings(ValueState& StImpl) { |
| 952 | return RefBindings((RefBindings::TreeTy*) StImpl.CheckerState); |
| 953 | } |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 954 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 955 | private: |
| 956 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 957 | static void SetRefBindings(ValueState& StImpl, RefBindings B) { |
| 958 | StImpl.CheckerState = B.getRoot(); |
| 959 | } |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 960 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 961 | RefBindings Remove(RefBindings B, SymbolID sym) { |
| 962 | return RefBFactory.Remove(B, sym); |
| 963 | } |
| 964 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 965 | RefBindings Update(RefBindings B, SymbolID sym, RefVal V, ArgEffect E, |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 966 | RefVal::Kind& hasErr); |
| 967 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 968 | void ProcessNonLeakError(ExplodedNodeSet<ValueState>& Dst, |
| 969 | GRStmtNodeBuilder<ValueState>& Builder, |
| 970 | Expr* NodeExpr, Expr* ErrorExpr, |
| 971 | ExplodedNode<ValueState>* Pred, |
| 972 | ValueState* St, |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 973 | RefVal::Kind hasErr, SymbolID Sym); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 974 | |
| 975 | ValueState* HandleSymbolDeath(ValueStateManager& VMgr, ValueState* St, |
| 976 | SymbolID sid, RefVal V, bool& hasLeak); |
| 977 | |
| 978 | ValueState* NukeBinding(ValueStateManager& VMgr, ValueState* St, |
| 979 | SymbolID sid); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 980 | |
| 981 | public: |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 982 | |
Ted Kremenek | 2f62f35 | 2008-05-02 18:01:49 +0000 | [diff] [blame] | 983 | CFRefCount(ASTContext& Ctx, bool gcenabled, bool StandardWarnings, |
| 984 | const LangOptions& lopts) |
Ted Kremenek | 9b0c09c | 2008-04-29 05:33:51 +0000 | [diff] [blame] | 985 | : Summaries(Ctx, gcenabled), |
Ted Kremenek | 2f62f35 | 2008-05-02 18:01:49 +0000 | [diff] [blame] | 986 | EmitStandardWarnings(StandardWarnings), |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 987 | LOpts(lopts), |
Ted Kremenek | 1bd6ddb | 2008-05-01 18:31:44 +0000 | [diff] [blame] | 988 | RetainSelector(GetNullarySelector("retain", Ctx)), |
| 989 | ReleaseSelector(GetNullarySelector("release", Ctx)), |
| 990 | AutoreleaseSelector(GetNullarySelector("autorelease", Ctx)) {} |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 991 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 992 | virtual ~CFRefCount() { |
| 993 | for (LeaksTy::iterator I = Leaks.begin(), E = Leaks.end(); I!=E; ++I) |
| 994 | delete I->second; |
| 995 | } |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 996 | |
| 997 | virtual void RegisterChecks(GRExprEngine& Eng); |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 998 | |
| 999 | virtual ValueState::CheckerStatePrinter* getCheckerStatePrinter() { |
| 1000 | return &Printer; |
| 1001 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1002 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1003 | bool isGCEnabled() const { return Summaries.isGCEnabled(); } |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1004 | const LangOptions& getLangOptions() const { return LOpts; } |
| 1005 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1006 | // Calls. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1007 | |
| 1008 | void EvalSummary(ExplodedNodeSet<ValueState>& Dst, |
| 1009 | GRExprEngine& Eng, |
| 1010 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1011 | Expr* Ex, |
| 1012 | Expr* Receiver, |
| 1013 | RetainSummary* Summ, |
| 1014 | Expr** arg_beg, Expr** arg_end, |
| 1015 | ExplodedNode<ValueState>* Pred); |
| 1016 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1017 | virtual void EvalCall(ExplodedNodeSet<ValueState>& Dst, |
Ted Kremenek | ce0767f | 2008-03-12 21:06:49 +0000 | [diff] [blame] | 1018 | GRExprEngine& Eng, |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1019 | GRStmtNodeBuilder<ValueState>& Builder, |
Ted Kremenek | 0a6a80b | 2008-04-23 20:12:28 +0000 | [diff] [blame] | 1020 | CallExpr* CE, RVal L, |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1021 | ExplodedNode<ValueState>* Pred); |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1022 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1023 | |
Ted Kremenek | 4b4738b | 2008-04-15 23:44:31 +0000 | [diff] [blame] | 1024 | virtual void EvalObjCMessageExpr(ExplodedNodeSet<ValueState>& Dst, |
| 1025 | GRExprEngine& Engine, |
| 1026 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1027 | ObjCMessageExpr* ME, |
| 1028 | ExplodedNode<ValueState>* Pred); |
| 1029 | |
| 1030 | bool EvalObjCMessageExprAux(ExplodedNodeSet<ValueState>& Dst, |
| 1031 | GRExprEngine& Engine, |
| 1032 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1033 | ObjCMessageExpr* ME, |
| 1034 | ExplodedNode<ValueState>* Pred); |
| 1035 | |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1036 | // Stores. |
| 1037 | |
| 1038 | virtual void EvalStore(ExplodedNodeSet<ValueState>& Dst, |
| 1039 | GRExprEngine& Engine, |
| 1040 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1041 | Expr* E, ExplodedNode<ValueState>* Pred, |
| 1042 | ValueState* St, RVal TargetLV, RVal Val); |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1043 | // End-of-path. |
| 1044 | |
| 1045 | virtual void EvalEndPath(GRExprEngine& Engine, |
| 1046 | GREndPathNodeBuilder<ValueState>& Builder); |
| 1047 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1048 | virtual void EvalDeadSymbols(ExplodedNodeSet<ValueState>& Dst, |
| 1049 | GRExprEngine& Engine, |
| 1050 | GRStmtNodeBuilder<ValueState>& Builder, |
Ted Kremenek | ac91ce9 | 2008-04-25 01:25:15 +0000 | [diff] [blame] | 1051 | ExplodedNode<ValueState>* Pred, |
| 1052 | Stmt* S, |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1053 | ValueState* St, |
| 1054 | const ValueStateManager::DeadSymbolsTy& Dead); |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1055 | // Return statements. |
| 1056 | |
| 1057 | virtual void EvalReturn(ExplodedNodeSet<ValueState>& Dst, |
| 1058 | GRExprEngine& Engine, |
| 1059 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1060 | ReturnStmt* S, |
| 1061 | ExplodedNode<ValueState>* Pred); |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1062 | |
| 1063 | // Assumptions. |
| 1064 | |
| 1065 | virtual ValueState* EvalAssume(GRExprEngine& Engine, ValueState* St, |
| 1066 | RVal Cond, bool Assumption, bool& isFeasible); |
| 1067 | |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1068 | // Error iterators. |
| 1069 | |
| 1070 | typedef UseAfterReleasesTy::iterator use_after_iterator; |
| 1071 | typedef ReleasesNotOwnedTy::iterator bad_release_iterator; |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 1072 | typedef LeaksTy::iterator leaks_iterator; |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1073 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1074 | use_after_iterator use_after_begin() { return UseAfterReleases.begin(); } |
| 1075 | use_after_iterator use_after_end() { return UseAfterReleases.end(); } |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1076 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1077 | bad_release_iterator bad_release_begin() { return ReleasesNotOwned.begin(); } |
| 1078 | bad_release_iterator bad_release_end() { return ReleasesNotOwned.end(); } |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 1079 | |
| 1080 | leaks_iterator leaks_begin() { return Leaks.begin(); } |
| 1081 | leaks_iterator leaks_end() { return Leaks.end(); } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1082 | }; |
| 1083 | |
| 1084 | } // end anonymous namespace |
| 1085 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1086 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1087 | |
| 1088 | |
Ted Kremenek | 3b11f7a | 2008-03-11 19:44:10 +0000 | [diff] [blame] | 1089 | void CFRefCount::BindingsPrinter::PrintCheckerState(std::ostream& Out, |
| 1090 | void* State, const char* nl, |
| 1091 | const char* sep) { |
| 1092 | RefBindings B((RefBindings::TreeTy*) State); |
| 1093 | |
| 1094 | if (State) |
| 1095 | Out << sep << nl; |
| 1096 | |
| 1097 | for (RefBindings::iterator I=B.begin(), E=B.end(); I!=E; ++I) { |
| 1098 | Out << (*I).first << " : "; |
| 1099 | (*I).second.print(Out); |
| 1100 | Out << nl; |
| 1101 | } |
| 1102 | } |
| 1103 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1104 | static inline ArgEffect GetArgE(RetainSummary* Summ, unsigned idx) { |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1105 | return Summ ? Summ->getArg(idx) : DoNothing; |
| 1106 | } |
| 1107 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 1108 | static inline RetEffect GetRetEffect(RetainSummary* Summ) { |
| 1109 | return Summ ? Summ->getRetEffect() : RetEffect::MakeNoRet(); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1110 | } |
| 1111 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1112 | static inline ArgEffect GetReceiverE(RetainSummary* Summ) { |
| 1113 | return Summ ? Summ->getReceiverEffect() : DoNothing; |
| 1114 | } |
| 1115 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1116 | void CFRefCount::ProcessNonLeakError(ExplodedNodeSet<ValueState>& Dst, |
| 1117 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1118 | Expr* NodeExpr, Expr* ErrorExpr, |
| 1119 | ExplodedNode<ValueState>* Pred, |
| 1120 | ValueState* St, |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1121 | RefVal::Kind hasErr, SymbolID Sym) { |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1122 | Builder.BuildSinks = true; |
| 1123 | GRExprEngine::NodeTy* N = Builder.MakeNode(Dst, NodeExpr, Pred, St); |
| 1124 | |
| 1125 | if (!N) return; |
| 1126 | |
| 1127 | switch (hasErr) { |
| 1128 | default: assert(false); |
| 1129 | case RefVal::ErrorUseAfterRelease: |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1130 | UseAfterReleases[N] = std::make_pair(ErrorExpr, Sym); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1131 | break; |
| 1132 | |
| 1133 | case RefVal::ErrorReleaseNotOwned: |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1134 | ReleasesNotOwned[N] = std::make_pair(ErrorExpr, Sym); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1135 | break; |
| 1136 | } |
| 1137 | } |
| 1138 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1139 | void CFRefCount::EvalSummary(ExplodedNodeSet<ValueState>& Dst, |
| 1140 | GRExprEngine& Eng, |
| 1141 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1142 | Expr* Ex, |
| 1143 | Expr* Receiver, |
| 1144 | RetainSummary* Summ, |
| 1145 | Expr** arg_beg, Expr** arg_end, |
| 1146 | ExplodedNode<ValueState>* Pred) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1147 | |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 1148 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1149 | // Get the state. |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1150 | ValueStateManager& StateMgr = Eng.getStateManager(); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1151 | ValueState* St = Builder.GetState(Pred); |
| 1152 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1153 | |
| 1154 | // Evaluate the effect of the arguments. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1155 | |
| 1156 | ValueState StVals = *St; |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1157 | RefVal::Kind hasErr = (RefVal::Kind) 0; |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1158 | unsigned idx = 0; |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1159 | Expr* ErrorExpr = NULL; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1160 | SymbolID ErrorSym = 0; |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1161 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1162 | for (Expr **I = arg_beg, **E = arg_end; I != E; ++I, ++idx) { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1163 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1164 | RVal V = StateMgr.GetRVal(St, *I); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1165 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1166 | if (isa<lval::SymbolVal>(V)) { |
| 1167 | SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol(); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1168 | RefBindings B = GetRefBindings(StVals); |
| 1169 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1170 | if (RefBindings::TreeTy* T = B.SlimFind(Sym)) { |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1171 | B = Update(B, Sym, T->getValue().second, GetArgE(Summ, idx), hasErr); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1172 | SetRefBindings(StVals, B); |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1173 | |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1174 | if (hasErr) { |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1175 | ErrorExpr = *I; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1176 | ErrorSym = T->getValue().first; |
Ted Kremenek | 99b0ecb | 2008-04-11 18:40:51 +0000 | [diff] [blame] | 1177 | break; |
| 1178 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1179 | } |
Ted Kremenek | e492420 | 2008-04-11 20:51:02 +0000 | [diff] [blame] | 1180 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1181 | else if (isa<LVal>(V)) { |
| 1182 | // Nuke all arguments passed by reference. |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1183 | StateMgr.Unbind(StVals, cast<LVal>(V)); |
Ted Kremenek | e492420 | 2008-04-11 20:51:02 +0000 | [diff] [blame] | 1184 | } |
Ted Kremenek | be62129 | 2008-04-22 21:39:21 +0000 | [diff] [blame] | 1185 | else if (isa<nonlval::LValAsInteger>(V)) |
| 1186 | StateMgr.Unbind(StVals, cast<nonlval::LValAsInteger>(V).getLVal()); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1187 | } |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1188 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1189 | // Evaluate the effect on the message receiver. |
| 1190 | |
| 1191 | if (!ErrorExpr && Receiver) { |
| 1192 | RVal V = StateMgr.GetRVal(St, Receiver); |
| 1193 | |
| 1194 | if (isa<lval::SymbolVal>(V)) { |
| 1195 | SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol(); |
| 1196 | RefBindings B = GetRefBindings(StVals); |
| 1197 | |
| 1198 | if (RefBindings::TreeTy* T = B.SlimFind(Sym)) { |
| 1199 | B = Update(B, Sym, T->getValue().second, GetReceiverE(Summ), hasErr); |
| 1200 | SetRefBindings(StVals, B); |
| 1201 | |
| 1202 | if (hasErr) { |
| 1203 | ErrorExpr = Receiver; |
| 1204 | ErrorSym = T->getValue().first; |
| 1205 | } |
| 1206 | } |
| 1207 | } |
| 1208 | } |
| 1209 | |
| 1210 | // Get the persistent state. |
| 1211 | |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1212 | St = StateMgr.getPersistentState(StVals); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1213 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1214 | // Process any errors. |
| 1215 | |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1216 | if (hasErr) { |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1217 | ProcessNonLeakError(Dst, Builder, Ex, ErrorExpr, Pred, St, |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1218 | hasErr, ErrorSym); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1219 | return; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1220 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1221 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1222 | // Finally, consult the summary for the return value. |
| 1223 | |
Ted Kremenek | 266d8b6 | 2008-05-06 02:26:56 +0000 | [diff] [blame] | 1224 | RetEffect RE = GetRetEffect(Summ); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1225 | |
| 1226 | switch (RE.getKind()) { |
| 1227 | default: |
| 1228 | assert (false && "Unhandled RetEffect."); break; |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1229 | |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 1230 | case RetEffect::NoRet: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1231 | |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1232 | // Make up a symbol for the return value (not reference counted). |
Ted Kremenek | e492420 | 2008-04-11 20:51:02 +0000 | [diff] [blame] | 1233 | // FIXME: This is basically copy-and-paste from GRSimpleVals. We |
| 1234 | // should compose behavior, not copy it. |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1235 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1236 | if (Ex->getType() != Eng.getContext().VoidTy) { |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1237 | unsigned Count = Builder.getCurrentBlockCount(); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1238 | SymbolID Sym = Eng.getSymbolManager().getConjuredSymbol(Ex, Count); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1239 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1240 | RVal X = Ex->getType()->isPointerType() |
| 1241 | ? cast<RVal>(lval::SymbolVal(Sym)) |
| 1242 | : cast<RVal>(nonlval::SymbolVal(Sym)); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1243 | |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1244 | St = StateMgr.SetRVal(St, Ex, X, Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | 455dd86 | 2008-04-11 20:23:24 +0000 | [diff] [blame] | 1245 | } |
| 1246 | |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 1247 | break; |
| 1248 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1249 | case RetEffect::Alias: { |
| 1250 | unsigned idx = RE.getValue(); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1251 | assert ((arg_end - arg_beg) >= 0); |
| 1252 | assert (idx < (unsigned) (arg_end - arg_beg)); |
| 1253 | RVal V = StateMgr.GetRVal(St, arg_beg[idx]); |
| 1254 | St = StateMgr.SetRVal(St, Ex, V, Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1255 | break; |
| 1256 | } |
| 1257 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1258 | case RetEffect::ReceiverAlias: { |
| 1259 | assert (Receiver); |
| 1260 | RVal V = StateMgr.GetRVal(St, Receiver); |
| 1261 | St = StateMgr.SetRVal(St, Ex, V, Eng.getCFG().isBlkExpr(Ex), false); |
| 1262 | break; |
| 1263 | } |
| 1264 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1265 | case RetEffect::OwnedSymbol: { |
| 1266 | unsigned Count = Builder.getCurrentBlockCount(); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1267 | SymbolID Sym = Eng.getSymbolManager().getConjuredSymbol(Ex, Count); |
| 1268 | |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1269 | ValueState StImpl = *St; |
| 1270 | RefBindings B = GetRefBindings(StImpl); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1271 | SetRefBindings(StImpl, RefBFactory.Add(B, Sym, RefVal::makeOwned())); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1272 | |
| 1273 | St = StateMgr.SetRVal(StateMgr.getPersistentState(StImpl), |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1274 | Ex, lval::SymbolVal(Sym), |
| 1275 | Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1276 | |
| 1277 | break; |
| 1278 | } |
| 1279 | |
| 1280 | case RetEffect::NotOwnedSymbol: { |
| 1281 | unsigned Count = Builder.getCurrentBlockCount(); |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1282 | SymbolID Sym = Eng.getSymbolManager().getConjuredSymbol(Ex, Count); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1283 | |
| 1284 | ValueState StImpl = *St; |
| 1285 | RefBindings B = GetRefBindings(StImpl); |
| 1286 | SetRefBindings(StImpl, RefBFactory.Add(B, Sym, RefVal::makeNotOwned())); |
| 1287 | |
| 1288 | St = StateMgr.SetRVal(StateMgr.getPersistentState(StImpl), |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1289 | Ex, lval::SymbolVal(Sym), |
| 1290 | Eng.getCFG().isBlkExpr(Ex), false); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1291 | |
| 1292 | break; |
| 1293 | } |
| 1294 | } |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1295 | |
| 1296 | Builder.MakeNode(Dst, Ex, Pred, St); |
| 1297 | } |
| 1298 | |
| 1299 | |
| 1300 | void CFRefCount::EvalCall(ExplodedNodeSet<ValueState>& Dst, |
| 1301 | GRExprEngine& Eng, |
| 1302 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1303 | CallExpr* CE, RVal L, |
| 1304 | ExplodedNode<ValueState>* Pred) { |
| 1305 | |
| 1306 | |
| 1307 | RetainSummary* Summ = NULL; |
| 1308 | |
| 1309 | // Get the summary. |
| 1310 | |
| 1311 | if (isa<lval::FuncVal>(L)) { |
| 1312 | lval::FuncVal FV = cast<lval::FuncVal>(L); |
| 1313 | FunctionDecl* FD = FV.getDecl(); |
| 1314 | Summ = Summaries.getSummary(FD, Eng.getContext()); |
| 1315 | } |
| 1316 | |
| 1317 | EvalSummary(Dst, Eng, Builder, CE, 0, Summ, |
| 1318 | CE->arg_begin(), CE->arg_end(), Pred); |
Ted Kremenek | 827f93b | 2008-03-06 00:08:09 +0000 | [diff] [blame] | 1319 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1320 | |
Ted Kremenek | 4b4738b | 2008-04-15 23:44:31 +0000 | [diff] [blame] | 1321 | |
| 1322 | void CFRefCount::EvalObjCMessageExpr(ExplodedNodeSet<ValueState>& Dst, |
| 1323 | GRExprEngine& Eng, |
| 1324 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1325 | ObjCMessageExpr* ME, |
| 1326 | ExplodedNode<ValueState>* Pred) { |
| 1327 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1328 | RetainSummary* Summ; |
Ted Kremenek | 3366180 | 2008-05-01 21:31:50 +0000 | [diff] [blame] | 1329 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1330 | if (ME->getReceiver()) |
Ted Kremenek | bcaff79 | 2008-05-06 15:44:25 +0000 | [diff] [blame] | 1331 | Summ = Summaries.getMethodSummary(ME); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1332 | else |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1333 | Summ = Summaries.getInstanceMethodSummary(ME->getClassName(), |
| 1334 | ME->getSelector()); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1335 | |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1336 | EvalSummary(Dst, Eng, Builder, ME, ME->getReceiver(), Summ, |
| 1337 | ME->arg_begin(), ME->arg_end(), Pred); |
Ted Kremenek | 4b4738b | 2008-04-15 23:44:31 +0000 | [diff] [blame] | 1338 | } |
Ted Kremenek | 926abf2 | 2008-05-06 04:20:12 +0000 | [diff] [blame] | 1339 | |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1340 | // Stores. |
| 1341 | |
| 1342 | void CFRefCount::EvalStore(ExplodedNodeSet<ValueState>& Dst, |
| 1343 | GRExprEngine& Eng, |
| 1344 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1345 | Expr* E, ExplodedNode<ValueState>* Pred, |
| 1346 | ValueState* St, RVal TargetLV, RVal Val) { |
| 1347 | |
| 1348 | // Check if we have a binding for "Val" and if we are storing it to something |
| 1349 | // we don't understand or otherwise the value "escapes" the function. |
| 1350 | |
| 1351 | if (!isa<lval::SymbolVal>(Val)) |
| 1352 | return; |
| 1353 | |
| 1354 | // Are we storing to something that causes the value to "escape"? |
| 1355 | |
| 1356 | bool escapes = false; |
| 1357 | |
| 1358 | if (!isa<lval::DeclVal>(TargetLV)) |
| 1359 | escapes = true; |
| 1360 | else |
| 1361 | escapes = cast<lval::DeclVal>(TargetLV).getDecl()->hasGlobalStorage(); |
| 1362 | |
| 1363 | if (!escapes) |
| 1364 | return; |
| 1365 | |
| 1366 | SymbolID Sym = cast<lval::SymbolVal>(Val).getSymbol(); |
| 1367 | RefBindings B = GetRefBindings(*St); |
| 1368 | RefBindings::TreeTy* T = B.SlimFind(Sym); |
| 1369 | |
| 1370 | if (!T) |
| 1371 | return; |
| 1372 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1373 | // Nuke the binding. |
| 1374 | St = NukeBinding(Eng.getStateManager(), St, Sym); |
Ted Kremenek | 7aef484 | 2008-04-16 20:40:59 +0000 | [diff] [blame] | 1375 | |
| 1376 | // Hand of the remaining logic to the parent implementation. |
| 1377 | GRSimpleVals::EvalStore(Dst, Eng, Builder, E, Pred, St, TargetLV, Val); |
| 1378 | } |
| 1379 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1380 | |
| 1381 | ValueState* CFRefCount::NukeBinding(ValueStateManager& VMgr, ValueState* St, |
| 1382 | SymbolID sid) { |
| 1383 | ValueState StImpl = *St; |
| 1384 | RefBindings B = GetRefBindings(StImpl); |
| 1385 | StImpl.CheckerState = RefBFactory.Remove(B, sid).getRoot(); |
| 1386 | return VMgr.getPersistentState(StImpl); |
| 1387 | } |
| 1388 | |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1389 | // End-of-path. |
| 1390 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1391 | ValueState* CFRefCount::HandleSymbolDeath(ValueStateManager& VMgr, |
| 1392 | ValueState* St, SymbolID sid, |
| 1393 | RefVal V, bool& hasLeak) { |
| 1394 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1395 | hasLeak = V.isOwned() || |
| 1396 | ((V.isNotOwned() || V.isReturnedOwned()) && V.getCount() > 0); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1397 | |
| 1398 | if (!hasLeak) |
| 1399 | return NukeBinding(VMgr, St, sid); |
| 1400 | |
| 1401 | RefBindings B = GetRefBindings(*St); |
| 1402 | ValueState StImpl = *St; |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1403 | |
| 1404 | StImpl.CheckerState = |
| 1405 | RefBFactory.Add(B, sid, RefVal::makeLeak(GetCount(V))).getRoot(); |
| 1406 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1407 | return VMgr.getPersistentState(StImpl); |
| 1408 | } |
| 1409 | |
| 1410 | void CFRefCount::EvalEndPath(GRExprEngine& Eng, |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1411 | GREndPathNodeBuilder<ValueState>& Builder) { |
| 1412 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1413 | ValueState* St = Builder.getState(); |
| 1414 | RefBindings B = GetRefBindings(*St); |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1415 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1416 | llvm::SmallVector<SymbolID, 10> Leaked; |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1417 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1418 | for (RefBindings::iterator I = B.begin(), E = B.end(); I != E; ++I) { |
| 1419 | bool hasLeak = false; |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1420 | |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1421 | St = HandleSymbolDeath(Eng.getStateManager(), St, |
| 1422 | (*I).first, (*I).second, hasLeak); |
| 1423 | |
| 1424 | if (hasLeak) Leaked.push_back((*I).first); |
| 1425 | } |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1426 | |
| 1427 | if (Leaked.empty()) |
| 1428 | return; |
| 1429 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1430 | ExplodedNode<ValueState>* N = Builder.MakeNode(St); |
Ted Kremenek | cfc909d | 2008-04-18 16:30:14 +0000 | [diff] [blame] | 1431 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1432 | if (!N) |
Ted Kremenek | cfc909d | 2008-04-18 16:30:14 +0000 | [diff] [blame] | 1433 | return; |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1434 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1435 | std::vector<SymbolID>*& LeaksAtNode = Leaks[N]; |
| 1436 | assert (!LeaksAtNode); |
| 1437 | LeaksAtNode = new std::vector<SymbolID>(); |
Ted Kremenek | 3f3c9c8 | 2008-04-16 22:32:20 +0000 | [diff] [blame] | 1438 | |
| 1439 | for (llvm::SmallVector<SymbolID, 10>::iterator I=Leaked.begin(), |
| 1440 | E = Leaked.end(); I != E; ++I) |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1441 | (*LeaksAtNode).push_back(*I); |
Ted Kremenek | ffefc35 | 2008-04-11 22:25:11 +0000 | [diff] [blame] | 1442 | } |
| 1443 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1444 | // Dead symbols. |
| 1445 | |
| 1446 | void CFRefCount::EvalDeadSymbols(ExplodedNodeSet<ValueState>& Dst, |
| 1447 | GRExprEngine& Eng, |
| 1448 | GRStmtNodeBuilder<ValueState>& Builder, |
Ted Kremenek | ac91ce9 | 2008-04-25 01:25:15 +0000 | [diff] [blame] | 1449 | ExplodedNode<ValueState>* Pred, |
| 1450 | Stmt* S, |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1451 | ValueState* St, |
| 1452 | const ValueStateManager::DeadSymbolsTy& Dead) { |
Ted Kremenek | ac91ce9 | 2008-04-25 01:25:15 +0000 | [diff] [blame] | 1453 | |
Ted Kremenek | 541db37 | 2008-04-24 23:57:27 +0000 | [diff] [blame] | 1454 | // FIXME: a lot of copy-and-paste from EvalEndPath. Refactor. |
| 1455 | |
| 1456 | RefBindings B = GetRefBindings(*St); |
| 1457 | llvm::SmallVector<SymbolID, 10> Leaked; |
| 1458 | |
| 1459 | for (ValueStateManager::DeadSymbolsTy::const_iterator |
| 1460 | I=Dead.begin(), E=Dead.end(); I!=E; ++I) { |
| 1461 | |
| 1462 | RefBindings::TreeTy* T = B.SlimFind(*I); |
| 1463 | |
| 1464 | if (!T) |
| 1465 | continue; |
| 1466 | |
| 1467 | bool hasLeak = false; |
| 1468 | |
| 1469 | St = HandleSymbolDeath(Eng.getStateManager(), St, |
| 1470 | *I, T->getValue().second, hasLeak); |
| 1471 | |
| 1472 | if (hasLeak) Leaked.push_back(*I); |
| 1473 | } |
| 1474 | |
| 1475 | if (Leaked.empty()) |
| 1476 | return; |
| 1477 | |
| 1478 | ExplodedNode<ValueState>* N = Builder.MakeNode(Dst, S, Pred, St); |
| 1479 | |
| 1480 | if (!N) |
| 1481 | return; |
| 1482 | |
| 1483 | std::vector<SymbolID>*& LeaksAtNode = Leaks[N]; |
| 1484 | assert (!LeaksAtNode); |
| 1485 | LeaksAtNode = new std::vector<SymbolID>(); |
| 1486 | |
| 1487 | for (llvm::SmallVector<SymbolID, 10>::iterator I=Leaked.begin(), |
| 1488 | E = Leaked.end(); I != E; ++I) |
| 1489 | (*LeaksAtNode).push_back(*I); |
| 1490 | } |
| 1491 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1492 | // Return statements. |
| 1493 | |
| 1494 | void CFRefCount::EvalReturn(ExplodedNodeSet<ValueState>& Dst, |
| 1495 | GRExprEngine& Eng, |
| 1496 | GRStmtNodeBuilder<ValueState>& Builder, |
| 1497 | ReturnStmt* S, |
| 1498 | ExplodedNode<ValueState>* Pred) { |
| 1499 | |
| 1500 | Expr* RetE = S->getRetValue(); |
| 1501 | if (!RetE) return; |
| 1502 | |
| 1503 | ValueStateManager& StateMgr = Eng.getStateManager(); |
| 1504 | ValueState* St = Builder.GetState(Pred); |
| 1505 | RVal V = StateMgr.GetRVal(St, RetE); |
| 1506 | |
| 1507 | if (!isa<lval::SymbolVal>(V)) |
| 1508 | return; |
| 1509 | |
| 1510 | // Get the reference count binding (if any). |
| 1511 | SymbolID Sym = cast<lval::SymbolVal>(V).getSymbol(); |
| 1512 | RefBindings B = GetRefBindings(*St); |
| 1513 | RefBindings::TreeTy* T = B.SlimFind(Sym); |
| 1514 | |
| 1515 | if (!T) |
| 1516 | return; |
| 1517 | |
| 1518 | // Change the reference count. |
| 1519 | |
| 1520 | RefVal X = T->getValue().second; |
| 1521 | |
| 1522 | switch (X.getKind()) { |
| 1523 | |
| 1524 | case RefVal::Owned: { |
| 1525 | unsigned cnt = X.getCount(); |
| 1526 | X = RefVal::makeReturnedOwned(cnt); |
| 1527 | break; |
| 1528 | } |
| 1529 | |
| 1530 | case RefVal::NotOwned: { |
| 1531 | unsigned cnt = X.getCount(); |
| 1532 | X = cnt ? RefVal::makeReturnedOwned(cnt - 1) |
| 1533 | : RefVal::makeReturnedNotOwned(); |
| 1534 | break; |
| 1535 | } |
| 1536 | |
| 1537 | default: |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1538 | return; |
| 1539 | } |
| 1540 | |
| 1541 | // Update the binding. |
| 1542 | |
| 1543 | ValueState StImpl = *St; |
| 1544 | StImpl.CheckerState = RefBFactory.Add(B, Sym, X).getRoot(); |
| 1545 | Builder.MakeNode(Dst, S, Pred, StateMgr.getPersistentState(StImpl)); |
| 1546 | } |
| 1547 | |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 1548 | // Assumptions. |
| 1549 | |
| 1550 | ValueState* CFRefCount::EvalAssume(GRExprEngine& Eng, ValueState* St, |
| 1551 | RVal Cond, bool Assumption, |
| 1552 | bool& isFeasible) { |
| 1553 | |
| 1554 | // FIXME: We may add to the interface of EvalAssume the list of symbols |
| 1555 | // whose assumptions have changed. For now we just iterate through the |
| 1556 | // bindings and check if any of the tracked symbols are NULL. This isn't |
| 1557 | // too bad since the number of symbols we will track in practice are |
| 1558 | // probably small and EvalAssume is only called at branches and a few |
| 1559 | // other places. |
| 1560 | |
| 1561 | RefBindings B = GetRefBindings(*St); |
| 1562 | |
| 1563 | if (B.isEmpty()) |
| 1564 | return St; |
| 1565 | |
| 1566 | bool changed = false; |
| 1567 | |
| 1568 | for (RefBindings::iterator I=B.begin(), E=B.end(); I!=E; ++I) { |
| 1569 | |
| 1570 | // Check if the symbol is null (or equal to any constant). |
| 1571 | // If this is the case, stop tracking the symbol. |
| 1572 | |
| 1573 | if (St->getSymVal(I.getKey())) { |
| 1574 | changed = true; |
| 1575 | B = RefBFactory.Remove(B, I.getKey()); |
| 1576 | } |
| 1577 | } |
| 1578 | |
| 1579 | if (!changed) |
| 1580 | return St; |
| 1581 | |
| 1582 | ValueState StImpl = *St; |
| 1583 | StImpl.CheckerState = B.getRoot(); |
| 1584 | return Eng.getStateManager().getPersistentState(StImpl); |
| 1585 | } |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1586 | |
| 1587 | CFRefCount::RefBindings CFRefCount::Update(RefBindings B, SymbolID sym, |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1588 | RefVal V, ArgEffect E, |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1589 | RefVal::Kind& hasErr) { |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1590 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1591 | // FIXME: This dispatch can potentially be sped up by unifiying it into |
| 1592 | // a single switch statement. Opt for simplicity for now. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1593 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1594 | switch (E) { |
| 1595 | default: |
| 1596 | assert (false && "Unhandled CFRef transition."); |
| 1597 | |
| 1598 | case DoNothing: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1599 | if (!isGCEnabled() && V.getKind() == RefVal::Released) { |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1600 | V = RefVal::makeUseAfterRelease(); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1601 | hasErr = V.getKind(); |
Ted Kremenek | ce3ed1e | 2008-03-12 01:21:45 +0000 | [diff] [blame] | 1602 | break; |
| 1603 | } |
| 1604 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1605 | return B; |
| 1606 | |
Ted Kremenek | 227c537 | 2008-05-06 02:41:27 +0000 | [diff] [blame] | 1607 | case StopTracking: |
| 1608 | return RefBFactory.Remove(B, sym); |
| 1609 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1610 | case IncRef: |
| 1611 | switch (V.getKind()) { |
| 1612 | default: |
| 1613 | assert(false); |
| 1614 | |
| 1615 | case RefVal::Owned: |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 1616 | V = RefVal::makeOwned(V.getCount()+1); |
| 1617 | break; |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1618 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1619 | case RefVal::NotOwned: |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1620 | V = RefVal::makeNotOwned(V.getCount()+1); |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1621 | break; |
| 1622 | |
| 1623 | case RefVal::Released: |
Ted Kremenek | a8c3c43 | 2008-05-05 22:11:16 +0000 | [diff] [blame] | 1624 | if (isGCEnabled()) |
Ted Kremenek | e2dd957 | 2008-04-29 05:44:10 +0000 | [diff] [blame] | 1625 | V = RefVal::makeOwned(); |
| 1626 | else { |
| 1627 | V = RefVal::makeUseAfterRelease(); |
| 1628 | hasErr = V.getKind(); |
| 1629 | } |
| 1630 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1631 | break; |
| 1632 | } |
| 1633 | |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 1634 | break; |
| 1635 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1636 | case DecRef: |
| 1637 | switch (V.getKind()) { |
| 1638 | default: |
| 1639 | assert (false); |
| 1640 | |
| 1641 | case RefVal::Owned: { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1642 | unsigned Count = V.getCount(); |
| 1643 | V = Count > 0 ? RefVal::makeOwned(Count - 1) : RefVal::makeReleased(); |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1644 | break; |
| 1645 | } |
| 1646 | |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1647 | case RefVal::NotOwned: { |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1648 | unsigned Count = V.getCount(); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1649 | |
Ted Kremenek | d9ccf68 | 2008-04-17 18:12:53 +0000 | [diff] [blame] | 1650 | if (Count > 0) |
| 1651 | V = RefVal::makeNotOwned(Count - 1); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1652 | else { |
| 1653 | V = RefVal::makeReleaseNotOwned(); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1654 | hasErr = V.getKind(); |
Ted Kremenek | c4f8102 | 2008-04-10 23:09:18 +0000 | [diff] [blame] | 1655 | } |
| 1656 | |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1657 | break; |
| 1658 | } |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1659 | |
| 1660 | case RefVal::Released: |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1661 | V = RefVal::makeUseAfterRelease(); |
Ted Kremenek | 1feab29 | 2008-04-16 04:28:53 +0000 | [diff] [blame] | 1662 | hasErr = V.getKind(); |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1663 | break; |
| 1664 | } |
Ted Kremenek | ab2fa2a | 2008-04-10 23:44:06 +0000 | [diff] [blame] | 1665 | |
| 1666 | break; |
Ted Kremenek | 0d72157 | 2008-03-11 17:48:22 +0000 | [diff] [blame] | 1667 | } |
| 1668 | |
| 1669 | return RefBFactory.Add(B, sym, V); |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 1670 | } |
| 1671 | |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1672 | |
| 1673 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 1674 | // Error reporting. |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 1675 | //===----------------------------------------------------------------------===// |
| 1676 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1677 | namespace { |
| 1678 | |
| 1679 | //===-------------===// |
| 1680 | // Bug Descriptions. // |
| 1681 | //===-------------===// |
| 1682 | |
Ted Kremenek | e376985 | 2008-04-18 20:54:29 +0000 | [diff] [blame] | 1683 | class VISIBILITY_HIDDEN CFRefBug : public BugTypeCacheLocation { |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1684 | protected: |
| 1685 | CFRefCount& TF; |
| 1686 | |
| 1687 | public: |
| 1688 | CFRefBug(CFRefCount& tf) : TF(tf) {} |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1689 | |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 1690 | CFRefCount& getTF() { return TF; } |
Ted Kremenek | 0ff3f20 | 2008-05-05 23:16:31 +0000 | [diff] [blame] | 1691 | const CFRefCount& getTF() const { return TF; } |
| 1692 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1693 | virtual bool isLeak() const { return false; } |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1694 | }; |
| 1695 | |
| 1696 | class VISIBILITY_HIDDEN UseAfterRelease : public CFRefBug { |
| 1697 | public: |
| 1698 | UseAfterRelease(CFRefCount& tf) : CFRefBug(tf) {} |
| 1699 | |
| 1700 | virtual const char* getName() const { |
Ted Kremenek | 0ff3f20 | 2008-05-05 23:16:31 +0000 | [diff] [blame] | 1701 | return "Use-After-Release"; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1702 | } |
| 1703 | virtual const char* getDescription() const { |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1704 | return "Reference-counted object is used" |
| 1705 | " after it is released."; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1706 | } |
| 1707 | |
| 1708 | virtual void EmitWarnings(BugReporter& BR); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1709 | }; |
| 1710 | |
| 1711 | class VISIBILITY_HIDDEN BadRelease : public CFRefBug { |
| 1712 | public: |
| 1713 | BadRelease(CFRefCount& tf) : CFRefBug(tf) {} |
| 1714 | |
| 1715 | virtual const char* getName() const { |
Ted Kremenek | 0ff3f20 | 2008-05-05 23:16:31 +0000 | [diff] [blame] | 1716 | return "Bad Release"; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1717 | } |
| 1718 | virtual const char* getDescription() const { |
| 1719 | return "Incorrect decrement of the reference count of a " |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1720 | "CoreFoundation object: " |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1721 | "The object is not owned at this point by the caller."; |
| 1722 | } |
| 1723 | |
| 1724 | virtual void EmitWarnings(BugReporter& BR); |
| 1725 | }; |
| 1726 | |
| 1727 | class VISIBILITY_HIDDEN Leak : public CFRefBug { |
| 1728 | public: |
| 1729 | Leak(CFRefCount& tf) : CFRefBug(tf) {} |
| 1730 | |
| 1731 | virtual const char* getName() const { |
Ted Kremenek | b3a44e7 | 2008-05-06 18:11:36 +0000 | [diff] [blame^] | 1732 | |
| 1733 | if (getTF().isGCEnabled()) |
| 1734 | return "Memory Leak (GC)"; |
| 1735 | |
| 1736 | if (getTF().getLangOptions().getGCMode() == LangOptions::HybridGC) |
| 1737 | return "Memory Leak (Hybrid MM, non-GC)"; |
| 1738 | |
| 1739 | assert (getTF().getLangOptions().getGCMode() == LangOptions::NonGC); |
| 1740 | return "Memory Leak"; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1741 | } |
| 1742 | |
| 1743 | virtual const char* getDescription() const { |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1744 | return "Object leaked."; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1745 | } |
| 1746 | |
| 1747 | virtual void EmitWarnings(BugReporter& BR); |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 1748 | virtual void GetErrorNodes(std::vector<ExplodedNode<ValueState>*>& Nodes); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1749 | virtual bool isLeak() const { return true; } |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1750 | }; |
| 1751 | |
| 1752 | //===---------===// |
| 1753 | // Bug Reports. // |
| 1754 | //===---------===// |
| 1755 | |
| 1756 | class VISIBILITY_HIDDEN CFRefReport : public RangedBugReport { |
| 1757 | SymbolID Sym; |
| 1758 | public: |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1759 | CFRefReport(CFRefBug& D, ExplodedNode<ValueState> *n, SymbolID sym) |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1760 | : RangedBugReport(D, n), Sym(sym) {} |
| 1761 | |
| 1762 | virtual ~CFRefReport() {} |
| 1763 | |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 1764 | CFRefBug& getBugType() { |
| 1765 | return (CFRefBug&) RangedBugReport::getBugType(); |
| 1766 | } |
| 1767 | const CFRefBug& getBugType() const { |
| 1768 | return (const CFRefBug&) RangedBugReport::getBugType(); |
| 1769 | } |
| 1770 | |
| 1771 | virtual void getRanges(BugReporter& BR, const SourceRange*& beg, |
| 1772 | const SourceRange*& end) { |
| 1773 | |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 1774 | if (!getBugType().isLeak()) |
Ted Kremenek | 5c3407a | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 1775 | RangedBugReport::getRanges(BR, beg, end); |
| 1776 | else { |
| 1777 | beg = 0; |
| 1778 | end = 0; |
| 1779 | } |
| 1780 | } |
| 1781 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1782 | virtual PathDiagnosticPiece* getEndPath(BugReporter& BR, |
| 1783 | ExplodedNode<ValueState>* N); |
| 1784 | |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1785 | virtual std::pair<const char**,const char**> getExtraDescriptiveText(); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1786 | |
| 1787 | virtual PathDiagnosticPiece* VisitNode(ExplodedNode<ValueState>* N, |
| 1788 | ExplodedNode<ValueState>* PrevN, |
| 1789 | ExplodedGraph<ValueState>& G, |
| 1790 | BugReporter& BR); |
| 1791 | }; |
| 1792 | |
| 1793 | |
| 1794 | } // end anonymous namespace |
| 1795 | |
| 1796 | void CFRefCount::RegisterChecks(GRExprEngine& Eng) { |
Ted Kremenek | 2f62f35 | 2008-05-02 18:01:49 +0000 | [diff] [blame] | 1797 | if (EmitStandardWarnings) GRSimpleVals::RegisterChecks(Eng); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1798 | Eng.Register(new UseAfterRelease(*this)); |
| 1799 | Eng.Register(new BadRelease(*this)); |
| 1800 | Eng.Register(new Leak(*this)); |
| 1801 | } |
| 1802 | |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1803 | |
| 1804 | static const char* Msgs[] = { |
| 1805 | "Code is compiled in garbage collection only mode" // GC only |
| 1806 | " (the bug occurs with garbage collection enabled).", |
| 1807 | |
| 1808 | "Code is compiled without garbage collection.", // No GC. |
| 1809 | |
| 1810 | "Code is compiled for use with and without garbage collection (GC)." |
| 1811 | " The bug occurs with GC enabled.", // Hybrid, with GC. |
| 1812 | |
| 1813 | "Code is compiled for use with and without garbage collection (GC)." |
| 1814 | " The bug occurs in non-GC mode." // Hyrbird, without GC/ |
| 1815 | }; |
| 1816 | |
| 1817 | std::pair<const char**,const char**> CFRefReport::getExtraDescriptiveText() { |
| 1818 | CFRefCount& TF = static_cast<CFRefBug&>(getBugType()).getTF(); |
| 1819 | |
| 1820 | switch (TF.getLangOptions().getGCMode()) { |
| 1821 | default: |
| 1822 | assert(false); |
Ted Kremenek | cb470940 | 2008-05-01 04:02:04 +0000 | [diff] [blame] | 1823 | |
| 1824 | case LangOptions::GCOnly: |
| 1825 | assert (TF.isGCEnabled()); |
| 1826 | return std::make_pair(&Msgs[0], &Msgs[0]+1); |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1827 | |
| 1828 | case LangOptions::NonGC: |
| 1829 | assert (!TF.isGCEnabled()); |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 1830 | return std::make_pair(&Msgs[1], &Msgs[1]+1); |
| 1831 | |
| 1832 | case LangOptions::HybridGC: |
| 1833 | if (TF.isGCEnabled()) |
| 1834 | return std::make_pair(&Msgs[2], &Msgs[2]+1); |
| 1835 | else |
| 1836 | return std::make_pair(&Msgs[3], &Msgs[3]+1); |
| 1837 | } |
| 1838 | } |
| 1839 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1840 | PathDiagnosticPiece* CFRefReport::VisitNode(ExplodedNode<ValueState>* N, |
| 1841 | ExplodedNode<ValueState>* PrevN, |
| 1842 | ExplodedGraph<ValueState>& G, |
| 1843 | BugReporter& BR) { |
| 1844 | |
| 1845 | // Check if the type state has changed. |
| 1846 | |
| 1847 | ValueState* PrevSt = PrevN->getState(); |
| 1848 | ValueState* CurrSt = N->getState(); |
| 1849 | |
| 1850 | CFRefCount::RefBindings PrevB = CFRefCount::GetRefBindings(*PrevSt); |
| 1851 | CFRefCount::RefBindings CurrB = CFRefCount::GetRefBindings(*CurrSt); |
| 1852 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1853 | CFRefCount::RefBindings::TreeTy* PrevT = PrevB.SlimFind(Sym); |
| 1854 | CFRefCount::RefBindings::TreeTy* CurrT = CurrB.SlimFind(Sym); |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1855 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1856 | if (!CurrT) |
| 1857 | return NULL; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1858 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1859 | const char* Msg = NULL; |
| 1860 | RefVal CurrV = CurrB.SlimFind(Sym)->getValue().second; |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1861 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1862 | if (!PrevT) { |
| 1863 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1864 | Stmt* S = cast<PostStmt>(N->getLocation()).getStmt(); |
| 1865 | |
| 1866 | if (CurrV.isOwned()) { |
| 1867 | |
| 1868 | if (isa<CallExpr>(S)) |
| 1869 | Msg = "Function call returns an object with a +1 retain count" |
| 1870 | " (owning reference)."; |
| 1871 | else { |
| 1872 | assert (isa<ObjCMessageExpr>(S)); |
| 1873 | Msg = "Method returns an object with a +1 retain count" |
| 1874 | " (owning reference)."; |
| 1875 | } |
| 1876 | } |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1877 | else { |
| 1878 | assert (CurrV.isNotOwned()); |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1879 | |
| 1880 | if (isa<CallExpr>(S)) |
| 1881 | Msg = "Function call returns an object with a +0 retain count" |
| 1882 | " (non-owning reference)."; |
| 1883 | else { |
| 1884 | assert (isa<ObjCMessageExpr>(S)); |
| 1885 | Msg = "Method returns an object with a +0 retain count" |
| 1886 | " (non-owning reference)."; |
| 1887 | } |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1888 | } |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1889 | |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1890 | FullSourceLoc Pos(S->getLocStart(), BR.getContext().getSourceManager()); |
| 1891 | PathDiagnosticPiece* P = new PathDiagnosticPiece(Pos, Msg); |
| 1892 | |
| 1893 | if (Expr* Exp = dyn_cast<Expr>(S)) |
| 1894 | P->addRange(Exp->getSourceRange()); |
| 1895 | |
| 1896 | return P; |
| 1897 | } |
| 1898 | |
| 1899 | // Determine if the typestate has changed. |
| 1900 | |
| 1901 | RefVal PrevV = PrevB.SlimFind(Sym)->getValue().second; |
| 1902 | |
| 1903 | if (PrevV == CurrV) |
| 1904 | return NULL; |
| 1905 | |
| 1906 | // The typestate has changed. |
| 1907 | |
| 1908 | std::ostringstream os; |
| 1909 | |
| 1910 | switch (CurrV.getKind()) { |
| 1911 | case RefVal::Owned: |
| 1912 | case RefVal::NotOwned: |
| 1913 | assert (PrevV.getKind() == CurrV.getKind()); |
| 1914 | |
| 1915 | if (PrevV.getCount() > CurrV.getCount()) |
| 1916 | os << "Reference count decremented."; |
| 1917 | else |
| 1918 | os << "Reference count incremented."; |
| 1919 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1920 | if (unsigned Count = GetCount(CurrV)) { |
| 1921 | |
| 1922 | os << " Object has +" << Count; |
Ted Kremenek | 752b584 | 2008-04-18 05:32:44 +0000 | [diff] [blame] | 1923 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1924 | if (Count > 1) |
| 1925 | os << " retain counts."; |
Ted Kremenek | 752b584 | 2008-04-18 05:32:44 +0000 | [diff] [blame] | 1926 | else |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1927 | os << " retain count."; |
Ted Kremenek | 752b584 | 2008-04-18 05:32:44 +0000 | [diff] [blame] | 1928 | } |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1929 | |
| 1930 | Msg = os.str().c_str(); |
| 1931 | |
| 1932 | break; |
| 1933 | |
| 1934 | case RefVal::Released: |
| 1935 | Msg = "Object released."; |
| 1936 | break; |
| 1937 | |
| 1938 | case RefVal::ReturnedOwned: |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1939 | Msg = "Object returned to caller as owning reference (single retain count" |
| 1940 | " transferred to caller)."; |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1941 | break; |
| 1942 | |
| 1943 | case RefVal::ReturnedNotOwned: |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1944 | Msg = "Object returned to caller with a +0 (non-owning) retain count."; |
Ted Kremenek | a850395 | 2008-04-18 04:55:01 +0000 | [diff] [blame] | 1945 | break; |
| 1946 | |
| 1947 | default: |
| 1948 | return NULL; |
| 1949 | } |
| 1950 | |
| 1951 | Stmt* S = cast<PostStmt>(N->getLocation()).getStmt(); |
| 1952 | FullSourceLoc Pos(S->getLocStart(), BR.getContext().getSourceManager()); |
| 1953 | PathDiagnosticPiece* P = new PathDiagnosticPiece(Pos, Msg); |
| 1954 | |
| 1955 | // Add the range by scanning the children of the statement for any bindings |
| 1956 | // to Sym. |
| 1957 | |
| 1958 | ValueStateManager& VSM = BR.getEngine().getStateManager(); |
| 1959 | |
| 1960 | for (Stmt::child_iterator I = S->child_begin(), E = S->child_end(); I!=E; ++I) |
| 1961 | if (Expr* Exp = dyn_cast_or_null<Expr>(*I)) { |
| 1962 | RVal X = VSM.GetRVal(CurrSt, Exp); |
| 1963 | |
| 1964 | if (lval::SymbolVal* SV = dyn_cast<lval::SymbolVal>(&X)) |
| 1965 | if (SV->getSymbol() == Sym) { |
| 1966 | P->addRange(Exp->getSourceRange()); break; |
| 1967 | } |
| 1968 | } |
| 1969 | |
| 1970 | return P; |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 1971 | } |
| 1972 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1973 | PathDiagnosticPiece* CFRefReport::getEndPath(BugReporter& BR, |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 1974 | ExplodedNode<ValueState>* EndN) { |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1975 | |
| 1976 | if (!getBugType().isLeak()) |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 1977 | return RangedBugReport::getEndPath(BR, EndN); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1978 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1979 | typedef CFRefCount::RefBindings RefBindings; |
| 1980 | |
| 1981 | // Get the retain count. |
| 1982 | unsigned long RetCount = 0; |
| 1983 | |
| 1984 | { |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 1985 | ValueState* St = EndN->getState(); |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 1986 | RefBindings B = RefBindings((RefBindings::TreeTy*) St->CheckerState); |
| 1987 | RefBindings::TreeTy* T = B.SlimFind(Sym); |
| 1988 | assert (T); |
| 1989 | RetCount = GetCount(T->getValue().second); |
| 1990 | } |
| 1991 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1992 | // We are a leak. Walk up the graph to get to the first node where the |
| 1993 | // symbol appeared. |
| 1994 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 1995 | ExplodedNode<ValueState>* N = EndN; |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 1996 | ExplodedNode<ValueState>* Last = N; |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 1997 | |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 1998 | // Find the first node that referred to the tracked symbol. We also |
| 1999 | // try and find the first VarDecl the value was stored to. |
| 2000 | |
| 2001 | VarDecl* FirstDecl = 0; |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2002 | |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2003 | while (N) { |
| 2004 | ValueState* St = N->getState(); |
| 2005 | RefBindings B = RefBindings((RefBindings::TreeTy*) St->CheckerState); |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2006 | RefBindings::TreeTy* T = B.SlimFind(Sym); |
| 2007 | |
| 2008 | if (!T) |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2009 | break; |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2010 | |
| 2011 | VarDecl* VD = 0; |
| 2012 | |
| 2013 | // Determine if there is an LVal binding to the symbol. |
| 2014 | for (ValueState::vb_iterator I=St->vb_begin(), E=St->vb_end(); I!=E; ++I) { |
| 2015 | if (!isa<lval::SymbolVal>(I->second) // Is the value a symbol? |
| 2016 | || cast<lval::SymbolVal>(I->second).getSymbol() != Sym) |
| 2017 | continue; |
| 2018 | |
| 2019 | if (VD) { // Multiple decls map to this symbol. |
| 2020 | VD = 0; |
| 2021 | break; |
| 2022 | } |
| 2023 | |
| 2024 | VD = I->first; |
| 2025 | } |
| 2026 | |
| 2027 | if (VD) FirstDecl = VD; |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2028 | |
| 2029 | Last = N; |
| 2030 | N = N->pred_empty() ? NULL : *(N->pred_begin()); |
| 2031 | } |
| 2032 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2033 | // Get the allocate site. |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2034 | |
| 2035 | assert (Last); |
| 2036 | Stmt* FirstStmt = cast<PostStmt>(Last->getLocation()).getStmt(); |
| 2037 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2038 | SourceManager& SMgr = BR.getContext().getSourceManager(); |
| 2039 | unsigned AllocLine = SMgr.getLogicalLineNumber(FirstStmt->getLocStart()); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2040 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2041 | // Get the leak site. We may have multiple ExplodedNodes (one with the |
| 2042 | // leak) that occur on the same line number; if the node with the leak |
| 2043 | // has any immediate predecessor nodes with the same line number, find |
| 2044 | // any transitive-successors that have a different statement and use that |
| 2045 | // line number instead. This avoids emiting a diagnostic like: |
| 2046 | // |
| 2047 | // // 'y' is leaked. |
| 2048 | // int x = foo(y); |
| 2049 | // |
| 2050 | // instead we want: |
| 2051 | // |
| 2052 | // int x = foo(y); |
| 2053 | // // 'y' is leaked. |
| 2054 | |
| 2055 | Stmt* S = getStmt(BR); // This is the statement where the leak occured. |
| 2056 | assert (S); |
| 2057 | unsigned EndLine = SMgr.getLogicalLineNumber(S->getLocStart()); |
| 2058 | |
| 2059 | // Look in the *trimmed* graph at the immediate predecessor of EndN. Does |
| 2060 | // it occur on the same line? |
| 2061 | |
| 2062 | assert (!EndN->pred_empty()); // Not possible to have 0 predecessors. |
| 2063 | N = *(EndN->pred_begin()); |
| 2064 | |
| 2065 | do { |
| 2066 | ProgramPoint P = N->getLocation(); |
| 2067 | |
| 2068 | if (!isa<PostStmt>(P)) |
| 2069 | break; |
| 2070 | |
| 2071 | // Predecessor at same line? |
| 2072 | |
| 2073 | Stmt* SPred = cast<PostStmt>(P).getStmt(); |
| 2074 | |
| 2075 | if (SMgr.getLogicalLineNumber(SPred->getLocStart()) != EndLine) |
| 2076 | break; |
| 2077 | |
| 2078 | // The predecessor (where the object was not yet leaked) is a statement |
| 2079 | // on the same line. Get the first successor statement that appears |
| 2080 | // on a different line. For this operation, we can traverse the |
| 2081 | // non-trimmed graph. |
| 2082 | |
| 2083 | N = getEndNode(); // This is the node where the leak occured in the |
| 2084 | // original graph. |
| 2085 | |
| 2086 | while (!N->succ_empty()) { |
| 2087 | |
| 2088 | N = *(N->succ_begin()); |
| 2089 | ProgramPoint P = N->getLocation(); |
| 2090 | |
| 2091 | if (!isa<PostStmt>(P)) |
| 2092 | continue; |
| 2093 | |
| 2094 | Stmt* SSucc = cast<PostStmt>(P).getStmt(); |
| 2095 | |
| 2096 | if (SMgr.getLogicalLineNumber(SSucc->getLocStart()) != EndLine) { |
| 2097 | S = SSucc; |
| 2098 | break; |
| 2099 | } |
| 2100 | } |
| 2101 | } |
| 2102 | while (false); |
| 2103 | |
| 2104 | // Construct the location. |
| 2105 | |
| 2106 | FullSourceLoc L(S->getLocStart(), SMgr); |
| 2107 | |
| 2108 | // Generate the diagnostic. |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2109 | std::ostringstream os; |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2110 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2111 | os << "Object allocated on line " << AllocLine; |
Ted Kremenek | 198cae0 | 2008-05-02 20:53:50 +0000 | [diff] [blame] | 2112 | |
| 2113 | if (FirstDecl) |
| 2114 | os << " and stored into '" << FirstDecl->getName() << '\''; |
| 2115 | |
Ted Kremenek | 9363fd9 | 2008-05-05 17:53:17 +0000 | [diff] [blame] | 2116 | os << " is no longer referenced after this point and has a retain count of +" |
| 2117 | << RetCount << " (object leaked)."; |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2118 | |
Ted Kremenek | ea794e9 | 2008-05-05 18:50:19 +0000 | [diff] [blame] | 2119 | return new PathDiagnosticPiece(L, os.str()); |
Ted Kremenek | fe4d231 | 2008-05-01 23:13:35 +0000 | [diff] [blame] | 2120 | } |
| 2121 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2122 | void UseAfterRelease::EmitWarnings(BugReporter& BR) { |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2123 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2124 | for (CFRefCount::use_after_iterator I = TF.use_after_begin(), |
| 2125 | E = TF.use_after_end(); I != E; ++I) { |
| 2126 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2127 | CFRefReport report(*this, I->first, I->second.second); |
| 2128 | report.addRange(I->second.first->getSourceRange()); |
Ted Kremenek | 270ab7d | 2008-04-18 01:56:37 +0000 | [diff] [blame] | 2129 | BR.EmitWarning(report); |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2130 | } |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2131 | } |
| 2132 | |
| 2133 | void BadRelease::EmitWarnings(BugReporter& BR) { |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2134 | |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2135 | for (CFRefCount::bad_release_iterator I = TF.bad_release_begin(), |
| 2136 | E = TF.bad_release_end(); I != E; ++I) { |
| 2137 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2138 | CFRefReport report(*this, I->first, I->second.second); |
| 2139 | report.addRange(I->second.first->getSourceRange()); |
| 2140 | BR.EmitWarning(report); |
Ted Kremenek | 7d421f3 | 2008-04-09 23:49:11 +0000 | [diff] [blame] | 2141 | } |
| 2142 | } |
Ted Kremenek | 10fe66d | 2008-04-09 01:10:13 +0000 | [diff] [blame] | 2143 | |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 2144 | void Leak::EmitWarnings(BugReporter& BR) { |
| 2145 | |
| 2146 | for (CFRefCount::leaks_iterator I = TF.leaks_begin(), |
| 2147 | E = TF.leaks_end(); I != E; ++I) { |
| 2148 | |
Ted Kremenek | 2be7ddb | 2008-04-18 03:39:05 +0000 | [diff] [blame] | 2149 | std::vector<SymbolID>& SymV = *(I->second); |
| 2150 | unsigned n = SymV.size(); |
| 2151 | |
| 2152 | for (unsigned i = 0; i < n; ++i) { |
| 2153 | CFRefReport report(*this, I->first, SymV[i]); |
| 2154 | BR.EmitWarning(report); |
| 2155 | } |
Ted Kremenek | 7f3f41a | 2008-04-17 23:43:50 +0000 | [diff] [blame] | 2156 | } |
| 2157 | } |
| 2158 | |
Ted Kremenek | eef8f1e | 2008-04-18 19:23:43 +0000 | [diff] [blame] | 2159 | void Leak::GetErrorNodes(std::vector<ExplodedNode<ValueState>*>& Nodes) { |
| 2160 | for (CFRefCount::leaks_iterator I=TF.leaks_begin(), E=TF.leaks_end(); |
| 2161 | I!=E; ++I) |
| 2162 | Nodes.push_back(I->first); |
| 2163 | } |
| 2164 | |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2165 | //===----------------------------------------------------------------------===// |
Ted Kremenek | b1983ba | 2008-04-10 22:16:52 +0000 | [diff] [blame] | 2166 | // Transfer function creation for external clients. |
Ted Kremenek | a7338b4 | 2008-03-11 06:39:11 +0000 | [diff] [blame] | 2167 | //===----------------------------------------------------------------------===// |
| 2168 | |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2169 | GRTransferFuncs* clang::MakeCFRefCountTF(ASTContext& Ctx, bool GCEnabled, |
Ted Kremenek | 2f62f35 | 2008-05-02 18:01:49 +0000 | [diff] [blame] | 2170 | bool StandardWarnings, |
Ted Kremenek | fe30beb | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2171 | const LangOptions& lopts) { |
Ted Kremenek | 2f62f35 | 2008-05-02 18:01:49 +0000 | [diff] [blame] | 2172 | return new CFRefCount(Ctx, GCEnabled, StandardWarnings, lopts); |
Ted Kremenek | a4c7429 | 2008-04-10 22:58:08 +0000 | [diff] [blame] | 2173 | } |