Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 1 | // BugReporter.cpp - Generate PathDiagnostics for Bugs ------------*- C++ -*--// |
| 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 | // |
| 10 | // This file defines BugReporter, a utility class for generating |
Ted Kremenek | 6c07bdb | 2009-06-26 00:05:51 +0000 | [diff] [blame] | 11 | // PathDiagnostics. |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
Ted Kremenek | 9b66371 | 2011-02-10 01:03:03 +0000 | [diff] [blame] | 15 | #include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h" |
| 16 | #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" |
| 17 | #include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 18 | #include "clang/AST/ASTContext.h" |
Ted Kremenek | e41611a | 2009-07-16 18:13:04 +0000 | [diff] [blame] | 19 | #include "clang/Analysis/CFG.h" |
Benjamin Kramer | c35fb7d | 2012-01-28 12:06:22 +0000 | [diff] [blame] | 20 | #include "clang/AST/DeclObjC.h" |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 21 | #include "clang/AST/Expr.h" |
Ted Kremenek | 00605e0 | 2009-03-27 20:55:39 +0000 | [diff] [blame] | 22 | #include "clang/AST/ParentMap.h" |
Chris Lattner | 16f0049 | 2009-04-26 01:32:48 +0000 | [diff] [blame] | 23 | #include "clang/AST/StmtObjC.h" |
| 24 | #include "clang/Basic/SourceManager.h" |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 25 | #include "clang/Analysis/ProgramPoint.h" |
Ted Kremenek | 9b66371 | 2011-02-10 01:03:03 +0000 | [diff] [blame] | 26 | #include "clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h" |
Chris Lattner | 405674c | 2008-08-23 22:23:37 +0000 | [diff] [blame] | 27 | #include "llvm/Support/raw_ostream.h" |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 28 | #include "llvm/ADT/DenseMap.h" |
Benjamin Kramer | 8fe83e1 | 2012-02-04 13:45:25 +0000 | [diff] [blame] | 29 | #include "llvm/ADT/SmallString.h" |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 30 | #include "llvm/ADT/STLExtras.h" |
Ted Kremenek | 00605e0 | 2009-03-27 20:55:39 +0000 | [diff] [blame] | 31 | #include "llvm/ADT/OwningPtr.h" |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 32 | #include "llvm/ADT/IntrusiveRefCntPtr.h" |
Ted Kremenek | 10aa554 | 2009-03-12 23:41:59 +0000 | [diff] [blame] | 33 | #include <queue> |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 34 | |
| 35 | using namespace clang; |
Ted Kremenek | 9ef6537 | 2010-12-23 07:20:52 +0000 | [diff] [blame] | 36 | using namespace ento; |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 37 | |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 38 | BugReporterVisitor::~BugReporterVisitor() {} |
Ted Kremenek | 1b43102 | 2010-03-20 18:01:57 +0000 | [diff] [blame] | 39 | |
David Blaikie | 99ba9e3 | 2011-12-20 02:48:34 +0000 | [diff] [blame] | 40 | void BugReporterContext::anchor() {} |
| 41 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 42 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 43 | // Helper routines for walking the ExplodedGraph and fetching statements. |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 44 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 45 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 46 | static inline const Stmt *GetStmt(const ProgramPoint &P) { |
Ted Kremenek | 592362b | 2009-08-18 01:05:30 +0000 | [diff] [blame] | 47 | if (const StmtPoint* SP = dyn_cast<StmtPoint>(&P)) |
| 48 | return SP->getStmt(); |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 49 | else if (const BlockEdge *BE = dyn_cast<BlockEdge>(&P)) |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 50 | return BE->getSrc()->getTerminator(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 51 | |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 52 | return 0; |
Ted Kremenek | 706e3cf | 2008-04-07 23:35:17 +0000 | [diff] [blame] | 53 | } |
| 54 | |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 55 | static inline const ExplodedNode* |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 56 | GetPredecessorNode(const ExplodedNode *N) { |
Ted Kremenek | bd7efa8 | 2008-04-17 23:44:37 +0000 | [diff] [blame] | 57 | return N->pred_empty() ? NULL : *(N->pred_begin()); |
| 58 | } |
Ted Kremenek | 2673c9f | 2008-04-25 19:01:27 +0000 | [diff] [blame] | 59 | |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 60 | static inline const ExplodedNode* |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 61 | GetSuccessorNode(const ExplodedNode *N) { |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 62 | return N->succ_empty() ? NULL : *(N->succ_begin()); |
Ted Kremenek | bd7efa8 | 2008-04-17 23:44:37 +0000 | [diff] [blame] | 63 | } |
| 64 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 65 | static const Stmt *GetPreviousStmt(const ExplodedNode *N) { |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 66 | for (N = GetPredecessorNode(N); N; N = GetPredecessorNode(N)) |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 67 | if (const Stmt *S = GetStmt(N->getLocation())) |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 68 | return S; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 69 | |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 70 | return 0; |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 71 | } |
| 72 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 73 | static const Stmt *GetNextStmt(const ExplodedNode *N) { |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 74 | for (N = GetSuccessorNode(N); N; N = GetSuccessorNode(N)) |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 75 | if (const Stmt *S = GetStmt(N->getLocation())) { |
Ted Kremenek | f5ab8e6 | 2009-03-28 17:33:57 +0000 | [diff] [blame] | 76 | // Check if the statement is '?' or '&&'/'||'. These are "merges", |
| 77 | // not actual statement points. |
| 78 | switch (S->getStmtClass()) { |
| 79 | case Stmt::ChooseExprClass: |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 80 | case Stmt::BinaryConditionalOperatorClass: continue; |
Ted Kremenek | f5ab8e6 | 2009-03-28 17:33:57 +0000 | [diff] [blame] | 81 | case Stmt::ConditionalOperatorClass: continue; |
| 82 | case Stmt::BinaryOperatorClass: { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 83 | BinaryOperatorKind Op = cast<BinaryOperator>(S)->getOpcode(); |
| 84 | if (Op == BO_LAnd || Op == BO_LOr) |
Ted Kremenek | f5ab8e6 | 2009-03-28 17:33:57 +0000 | [diff] [blame] | 85 | continue; |
| 86 | break; |
| 87 | } |
| 88 | default: |
| 89 | break; |
| 90 | } |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 91 | return S; |
Ted Kremenek | f5ab8e6 | 2009-03-28 17:33:57 +0000 | [diff] [blame] | 92 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 93 | |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 94 | return 0; |
| 95 | } |
| 96 | |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 97 | static inline const Stmt* |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 98 | GetCurrentOrPreviousStmt(const ExplodedNode *N) { |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 99 | if (const Stmt *S = GetStmt(N->getLocation())) |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 100 | return S; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 101 | |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 102 | return GetPreviousStmt(N); |
| 103 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 104 | |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 105 | static inline const Stmt* |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 106 | GetCurrentOrNextStmt(const ExplodedNode *N) { |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 107 | if (const Stmt *S = GetStmt(N->getLocation())) |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 108 | return S; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 109 | |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 110 | return GetNextStmt(N); |
| 111 | } |
| 112 | |
| 113 | //===----------------------------------------------------------------------===// |
Ted Kremenek | c89f4b0 | 2012-02-28 23:06:21 +0000 | [diff] [blame] | 114 | // Diagnostic cleanup. |
| 115 | //===----------------------------------------------------------------------===// |
| 116 | |
| 117 | /// Recursively scan through a path and prune out calls and macros pieces |
| 118 | /// that aren't needed. Return true if afterwards the path contains |
| 119 | /// "interesting stuff" which means it should be pruned from the parent path. |
| 120 | static bool RemoveUneededCalls(PathPieces &pieces) { |
| 121 | bool containsSomethingInteresting = false; |
| 122 | const unsigned N = pieces.size(); |
| 123 | |
| 124 | for (unsigned i = 0 ; i < N ; ++i) { |
| 125 | // Remove the front piece from the path. If it is still something we |
| 126 | // want to keep once we are done, we will push it back on the end. |
| 127 | IntrusiveRefCntPtr<PathDiagnosticPiece> piece(pieces.front()); |
| 128 | pieces.pop_front(); |
| 129 | |
| 130 | if (PathDiagnosticCallPiece *call = |
| 131 | dyn_cast<PathDiagnosticCallPiece>(piece)) { |
| 132 | // Recursively clean out the subclass. Keep this call around if |
| 133 | // it contains any informative diagnostics. |
| 134 | if (!RemoveUneededCalls(call->path)) |
| 135 | continue; |
| 136 | containsSomethingInteresting = true; |
| 137 | } |
| 138 | else if (PathDiagnosticMacroPiece *macro = |
| 139 | dyn_cast<PathDiagnosticMacroPiece>(piece)) { |
| 140 | if (!RemoveUneededCalls(macro->subPieces)) |
| 141 | continue; |
| 142 | containsSomethingInteresting = true; |
| 143 | } |
| 144 | else if (PathDiagnosticEventPiece *event = |
| 145 | dyn_cast<PathDiagnosticEventPiece>(piece)) { |
| 146 | // We never throw away an event, but we do throw it away wholesale |
| 147 | // as part of a path if we throw the entire path away. |
| 148 | if (!event->isPrunable()) |
| 149 | containsSomethingInteresting = true; |
| 150 | } |
| 151 | |
| 152 | pieces.push_back(piece); |
| 153 | } |
| 154 | |
| 155 | return containsSomethingInteresting; |
| 156 | } |
| 157 | |
| 158 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 159 | // PathDiagnosticBuilder and its associated routines and helper objects. |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 160 | //===----------------------------------------------------------------------===// |
Ted Kremenek | b479dad | 2009-02-23 23:13:51 +0000 | [diff] [blame] | 161 | |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 162 | typedef llvm::DenseMap<const ExplodedNode*, |
| 163 | const ExplodedNode*> NodeBackMap; |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 164 | |
Ted Kremenek | babdd7b | 2009-03-27 05:06:10 +0000 | [diff] [blame] | 165 | namespace { |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 166 | class NodeMapClosure : public BugReport::NodeResolver { |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 167 | NodeBackMap& M; |
| 168 | public: |
| 169 | NodeMapClosure(NodeBackMap *m) : M(*m) {} |
| 170 | ~NodeMapClosure() {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 171 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 172 | const ExplodedNode *getOriginalNode(const ExplodedNode *N) { |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 173 | NodeBackMap::iterator I = M.find(N); |
| 174 | return I == M.end() ? 0 : I->second; |
| 175 | } |
| 176 | }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 177 | |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 178 | class PathDiagnosticBuilder : public BugReporterContext { |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 179 | BugReport *R; |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 180 | PathDiagnosticConsumer *PDC; |
Dylan Noblesmith | 6f42b62 | 2012-02-05 02:12:40 +0000 | [diff] [blame] | 181 | OwningPtr<ParentMap> PM; |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 182 | NodeMapClosure NMC; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 183 | public: |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 184 | const LocationContext *LC; |
| 185 | |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 186 | PathDiagnosticBuilder(GRBugReporter &br, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 187 | BugReport *r, NodeBackMap *Backmap, |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 188 | PathDiagnosticConsumer *pdc) |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 189 | : BugReporterContext(br), |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 190 | R(r), PDC(pdc), NMC(Backmap), LC(r->getErrorNode()->getLocationContext()) |
| 191 | {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 192 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 193 | PathDiagnosticLocation ExecutionContinues(const ExplodedNode *N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 194 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 195 | PathDiagnosticLocation ExecutionContinues(llvm::raw_string_ostream &os, |
| 196 | const ExplodedNode *N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 197 | |
Anna Zaks | 8e6431a | 2011-08-18 22:37:56 +0000 | [diff] [blame] | 198 | BugReport *getBugReport() { return R; } |
| 199 | |
Tom Care | 212f6d3 | 2010-09-16 03:50:38 +0000 | [diff] [blame] | 200 | Decl const &getCodeDecl() { return R->getErrorNode()->getCodeDecl(); } |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 201 | |
| 202 | ParentMap& getParentMap() { return LC->getParentMap(); } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 203 | |
Ted Kremenek | c3f83ad | 2009-04-01 17:18:21 +0000 | [diff] [blame] | 204 | const Stmt *getParent(const Stmt *S) { |
| 205 | return getParentMap().getParent(S); |
| 206 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 207 | |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 208 | virtual NodeMapClosure& getNodeResolver() { return NMC; } |
Douglas Gregor | 7297134 | 2009-04-18 00:02:19 +0000 | [diff] [blame] | 209 | |
Ted Kremenek | d8c938b | 2009-03-27 21:16:25 +0000 | [diff] [blame] | 210 | PathDiagnosticLocation getEnclosingStmtLocation(const Stmt *S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 211 | |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 212 | PathDiagnosticConsumer::PathGenerationScheme getGenerationScheme() const { |
| 213 | return PDC ? PDC->getGenerationScheme() : PathDiagnosticConsumer::Extensive; |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 214 | } |
| 215 | |
Ted Kremenek | babdd7b | 2009-03-27 05:06:10 +0000 | [diff] [blame] | 216 | bool supportsLogicalOpControlFlow() const { |
| 217 | return PDC ? PDC->supportsLogicalOpControlFlow() : true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 218 | } |
Ted Kremenek | babdd7b | 2009-03-27 05:06:10 +0000 | [diff] [blame] | 219 | }; |
| 220 | } // end anonymous namespace |
| 221 | |
Ted Kremenek | 00605e0 | 2009-03-27 20:55:39 +0000 | [diff] [blame] | 222 | PathDiagnosticLocation |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 223 | PathDiagnosticBuilder::ExecutionContinues(const ExplodedNode *N) { |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 224 | if (const Stmt *S = GetNextStmt(N)) |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 225 | return PathDiagnosticLocation(S, getSourceManager(), LC); |
Ted Kremenek | 00605e0 | 2009-03-27 20:55:39 +0000 | [diff] [blame] | 226 | |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 227 | return PathDiagnosticLocation::createDeclEnd(N->getLocationContext(), |
| 228 | getSourceManager()); |
Ted Kremenek | 082cb8d | 2009-03-12 18:41:53 +0000 | [diff] [blame] | 229 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 230 | |
Ted Kremenek | 00605e0 | 2009-03-27 20:55:39 +0000 | [diff] [blame] | 231 | PathDiagnosticLocation |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 232 | PathDiagnosticBuilder::ExecutionContinues(llvm::raw_string_ostream &os, |
| 233 | const ExplodedNode *N) { |
Ted Kremenek | babdd7b | 2009-03-27 05:06:10 +0000 | [diff] [blame] | 234 | |
Ted Kremenek | 143ca22 | 2008-05-06 18:11:09 +0000 | [diff] [blame] | 235 | // Slow, but probably doesn't matter. |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 236 | if (os.str().empty()) |
| 237 | os << ' '; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 238 | |
Ted Kremenek | 00605e0 | 2009-03-27 20:55:39 +0000 | [diff] [blame] | 239 | const PathDiagnosticLocation &Loc = ExecutionContinues(N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 240 | |
Ted Kremenek | 00605e0 | 2009-03-27 20:55:39 +0000 | [diff] [blame] | 241 | if (Loc.asStmt()) |
Ted Kremenek | b697b10 | 2009-02-23 22:44:26 +0000 | [diff] [blame] | 242 | os << "Execution continues on line " |
Chandler Carruth | 6421162 | 2011-07-25 21:09:52 +0000 | [diff] [blame] | 243 | << getSourceManager().getExpansionLineNumber(Loc.asLocation()) |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 244 | << '.'; |
Ted Kremenek | 4f1db53 | 2009-12-04 20:34:31 +0000 | [diff] [blame] | 245 | else { |
| 246 | os << "Execution jumps to the end of the "; |
| 247 | const Decl *D = N->getLocationContext()->getDecl(); |
| 248 | if (isa<ObjCMethodDecl>(D)) |
| 249 | os << "method"; |
| 250 | else if (isa<FunctionDecl>(D)) |
| 251 | os << "function"; |
| 252 | else { |
| 253 | assert(isa<BlockDecl>(D)); |
| 254 | os << "anonymous block"; |
| 255 | } |
| 256 | os << '.'; |
| 257 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 258 | |
Ted Kremenek | 082cb8d | 2009-03-12 18:41:53 +0000 | [diff] [blame] | 259 | return Loc; |
Ted Kremenek | 143ca22 | 2008-05-06 18:11:09 +0000 | [diff] [blame] | 260 | } |
| 261 | |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 262 | static bool IsNested(const Stmt *S, ParentMap &PM) { |
| 263 | if (isa<Expr>(S) && PM.isConsumedExpr(cast<Expr>(S))) |
| 264 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 265 | |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 266 | const Stmt *Parent = PM.getParentIgnoreParens(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 267 | |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 268 | if (Parent) |
| 269 | switch (Parent->getStmtClass()) { |
| 270 | case Stmt::ForStmtClass: |
| 271 | case Stmt::DoStmtClass: |
| 272 | case Stmt::WhileStmtClass: |
| 273 | return true; |
| 274 | default: |
| 275 | break; |
| 276 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 277 | |
| 278 | return false; |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 279 | } |
| 280 | |
Ted Kremenek | d8c938b | 2009-03-27 21:16:25 +0000 | [diff] [blame] | 281 | PathDiagnosticLocation |
| 282 | PathDiagnosticBuilder::getEnclosingStmtLocation(const Stmt *S) { |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 283 | assert(S && "Null Stmt *passed to getEnclosingStmtLocation"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 284 | ParentMap &P = getParentMap(); |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 285 | SourceManager &SMgr = getSourceManager(); |
Ted Kremenek | e88a170 | 2009-05-11 22:19:32 +0000 | [diff] [blame] | 286 | |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 287 | while (IsNested(S, P)) { |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 288 | const Stmt *Parent = P.getParentIgnoreParens(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 289 | |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 290 | if (!Parent) |
| 291 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 292 | |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 293 | switch (Parent->getStmtClass()) { |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 294 | case Stmt::BinaryOperatorClass: { |
| 295 | const BinaryOperator *B = cast<BinaryOperator>(Parent); |
| 296 | if (B->isLogicalOp()) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 297 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 298 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 299 | } |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 300 | case Stmt::CompoundStmtClass: |
| 301 | case Stmt::StmtExprClass: |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 302 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | 1d9a23a | 2009-03-28 04:08:14 +0000 | [diff] [blame] | 303 | case Stmt::ChooseExprClass: |
| 304 | // Similar to '?' if we are referring to condition, just have the edge |
| 305 | // point to the entire choose expression. |
| 306 | if (cast<ChooseExpr>(Parent)->getCond() == S) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 307 | return PathDiagnosticLocation(Parent, SMgr, LC); |
Ted Kremenek | 1d9a23a | 2009-03-28 04:08:14 +0000 | [diff] [blame] | 308 | else |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 309 | return PathDiagnosticLocation(S, SMgr, LC); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 310 | case Stmt::BinaryConditionalOperatorClass: |
Ted Kremenek | 1d9a23a | 2009-03-28 04:08:14 +0000 | [diff] [blame] | 311 | case Stmt::ConditionalOperatorClass: |
| 312 | // For '?', if we are referring to condition, just have the edge point |
| 313 | // to the entire '?' expression. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 314 | if (cast<AbstractConditionalOperator>(Parent)->getCond() == S) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 315 | return PathDiagnosticLocation(Parent, SMgr, LC); |
Ted Kremenek | 1d9a23a | 2009-03-28 04:08:14 +0000 | [diff] [blame] | 316 | else |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 317 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 318 | case Stmt::DoStmtClass: |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 319 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 320 | case Stmt::ForStmtClass: |
| 321 | if (cast<ForStmt>(Parent)->getBody() == S) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 322 | return PathDiagnosticLocation(S, SMgr, LC); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 323 | break; |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 324 | case Stmt::IfStmtClass: |
| 325 | if (cast<IfStmt>(Parent)->getCond() != S) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 326 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | 8bd4d03 | 2009-04-28 04:23:15 +0000 | [diff] [blame] | 327 | break; |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 328 | case Stmt::ObjCForCollectionStmtClass: |
| 329 | if (cast<ObjCForCollectionStmt>(Parent)->getBody() == S) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 330 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 331 | break; |
| 332 | case Stmt::WhileStmtClass: |
| 333 | if (cast<WhileStmt>(Parent)->getCond() != S) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 334 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | af3e3d5 | 2009-03-28 03:37:59 +0000 | [diff] [blame] | 335 | break; |
| 336 | default: |
| 337 | break; |
| 338 | } |
| 339 | |
Ted Kremenek | d8c938b | 2009-03-27 21:16:25 +0000 | [diff] [blame] | 340 | S = Parent; |
| 341 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 342 | |
Ted Kremenek | d8c938b | 2009-03-27 21:16:25 +0000 | [diff] [blame] | 343 | assert(S && "Cannot have null Stmt for PathDiagnosticLocation"); |
Ted Kremenek | e88a170 | 2009-05-11 22:19:32 +0000 | [diff] [blame] | 344 | |
| 345 | // Special case: DeclStmts can appear in for statement declarations, in which |
| 346 | // case the ForStmt is the context. |
| 347 | if (isa<DeclStmt>(S)) { |
| 348 | if (const Stmt *Parent = P.getParent(S)) { |
| 349 | switch (Parent->getStmtClass()) { |
| 350 | case Stmt::ForStmtClass: |
| 351 | case Stmt::ObjCForCollectionStmtClass: |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 352 | return PathDiagnosticLocation(Parent, SMgr, LC); |
Ted Kremenek | e88a170 | 2009-05-11 22:19:32 +0000 | [diff] [blame] | 353 | default: |
| 354 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 355 | } |
| 356 | } |
Ted Kremenek | e88a170 | 2009-05-11 22:19:32 +0000 | [diff] [blame] | 357 | } |
| 358 | else if (isa<BinaryOperator>(S)) { |
| 359 | // Special case: the binary operator represents the initialization |
| 360 | // code in a for statement (this can happen when the variable being |
| 361 | // initialized is an old variable. |
| 362 | if (const ForStmt *FS = |
| 363 | dyn_cast_or_null<ForStmt>(P.getParentIgnoreParens(S))) { |
| 364 | if (FS->getInit() == S) |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 365 | return PathDiagnosticLocation(FS, SMgr, LC); |
Ted Kremenek | e88a170 | 2009-05-11 22:19:32 +0000 | [diff] [blame] | 366 | } |
| 367 | } |
| 368 | |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 369 | return PathDiagnosticLocation(S, SMgr, LC); |
Ted Kremenek | d8c938b | 2009-03-27 21:16:25 +0000 | [diff] [blame] | 370 | } |
| 371 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 372 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 373 | // ScanNotableSymbols: closure-like callback for scanning Store bindings. |
| 374 | //===----------------------------------------------------------------------===// |
| 375 | |
Ted Kremenek | 18c66fd | 2011-08-15 22:09:50 +0000 | [diff] [blame] | 376 | static const VarDecl* GetMostRecentVarDeclBinding(const ExplodedNode *N, |
| 377 | ProgramStateManager& VMgr, |
| 378 | SVal X) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 379 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 380 | for ( ; N ; N = N->pred_empty() ? 0 : *N->pred_begin()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 381 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 382 | ProgramPoint P = N->getLocation(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 383 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 384 | if (!isa<PostStmt>(P)) |
| 385 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 386 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 387 | const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(cast<PostStmt>(P).getStmt()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 388 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 389 | if (!DR) |
| 390 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 391 | |
Ted Kremenek | 5eca482 | 2012-01-06 22:09:28 +0000 | [diff] [blame] | 392 | SVal Y = N->getState()->getSVal(DR, N->getLocationContext()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 393 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 394 | if (X != Y) |
| 395 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 396 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 397 | const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 398 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 399 | if (!VD) |
| 400 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 401 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 402 | return VD; |
| 403 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 404 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | namespace { |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 409 | class NotableSymbolHandler |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 410 | : public StoreManager::BindingsHandler { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 411 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 412 | SymbolRef Sym; |
Ted Kremenek | 8bef823 | 2012-01-26 21:29:00 +0000 | [diff] [blame] | 413 | ProgramStateRef PrevSt; |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 414 | const Stmt *S; |
Ted Kremenek | 18c66fd | 2011-08-15 22:09:50 +0000 | [diff] [blame] | 415 | ProgramStateManager& VMgr; |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 416 | const ExplodedNode *Pred; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 417 | PathDiagnostic& PD; |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 418 | BugReporter& BR; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 419 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 420 | public: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 421 | |
Ted Kremenek | 18c66fd | 2011-08-15 22:09:50 +0000 | [diff] [blame] | 422 | NotableSymbolHandler(SymbolRef sym, |
Ted Kremenek | 8bef823 | 2012-01-26 21:29:00 +0000 | [diff] [blame] | 423 | ProgramStateRef prevst, |
Ted Kremenek | 18c66fd | 2011-08-15 22:09:50 +0000 | [diff] [blame] | 424 | const Stmt *s, |
| 425 | ProgramStateManager& vmgr, |
| 426 | const ExplodedNode *pred, |
| 427 | PathDiagnostic& pd, |
| 428 | BugReporter& br) |
| 429 | : Sym(sym), |
| 430 | PrevSt(prevst), |
| 431 | S(s), |
| 432 | VMgr(vmgr), |
| 433 | Pred(pred), |
| 434 | PD(pd), |
| 435 | BR(br) {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 436 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 437 | bool HandleBinding(StoreManager& SMgr, Store store, const MemRegion* R, |
| 438 | SVal V) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 439 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 440 | SymbolRef ScanSym = V.getAsSymbol(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 441 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 442 | if (ScanSym != Sym) |
| 443 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 444 | |
| 445 | // Check if the previous state has this binding. |
Ted Kremenek | 1397663 | 2010-02-08 16:18:51 +0000 | [diff] [blame] | 446 | SVal X = PrevSt->getSVal(loc::MemRegionVal(R)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 447 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 448 | if (X == V) // Same binding? |
| 449 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 450 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 451 | // Different binding. Only handle assignments for now. We don't pull |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 452 | // this check out of the loop because we will eventually handle other |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 453 | // cases. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 454 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 455 | VarDecl *VD = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 456 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 457 | if (const BinaryOperator* B = dyn_cast<BinaryOperator>(S)) { |
| 458 | if (!B->isAssignmentOp()) |
| 459 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 460 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 461 | // What variable did we assign to? |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 462 | DeclRefExpr *DR = dyn_cast<DeclRefExpr>(B->getLHS()->IgnoreParenCasts()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 463 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 464 | if (!DR) |
| 465 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 466 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 467 | VD = dyn_cast<VarDecl>(DR->getDecl()); |
| 468 | } |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 469 | else if (const DeclStmt *DS = dyn_cast<DeclStmt>(S)) { |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 470 | // FIXME: Eventually CFGs won't have DeclStmts. Right now we |
| 471 | // assume that each DeclStmt has a single Decl. This invariant |
Chris Lattner | fc8f0e1 | 2011-04-15 05:22:18 +0000 | [diff] [blame] | 472 | // holds by construction in the CFG. |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 473 | VD = dyn_cast<VarDecl>(*DS->decl_begin()); |
| 474 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 475 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 476 | if (!VD) |
| 477 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 478 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 479 | // What is the most recently referenced variable with this binding? |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 480 | const VarDecl *MostRecent = GetMostRecentVarDeclBinding(Pred, VMgr, V); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 481 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 482 | if (!MostRecent) |
| 483 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 484 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 485 | // Create the diagnostic. |
Zhanyong Wan | 7dfc942 | 2011-02-16 21:13:32 +0000 | [diff] [blame] | 486 | if (Loc::isLocType(VD->getType())) { |
Dylan Noblesmith | f7ccbad | 2012-02-05 02:13:05 +0000 | [diff] [blame] | 487 | SmallString<64> buf; |
Jordy Rose | 7df1234 | 2011-08-21 05:25:15 +0000 | [diff] [blame] | 488 | llvm::raw_svector_ostream os(buf); |
Benjamin Kramer | b8989f2 | 2011-10-14 18:45:37 +0000 | [diff] [blame] | 489 | os << '\'' << *VD << "' now aliases '" << *MostRecent << '\''; |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 490 | PathDiagnosticLocation L = |
| 491 | PathDiagnosticLocation::createBegin(S, BR.getSourceManager(), |
| 492 | Pred->getLocationContext()); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 493 | PD.getActivePath().push_front(new PathDiagnosticEventPiece(L, os.str())); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 494 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 495 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 496 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 497 | } |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 498 | }; |
| 499 | } |
| 500 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 501 | static void HandleNotableSymbol(const ExplodedNode *N, |
| 502 | const Stmt *S, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 503 | SymbolRef Sym, BugReporter& BR, |
| 504 | PathDiagnostic& PD) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 505 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 506 | const ExplodedNode *Pred = N->pred_empty() ? 0 : *N->pred_begin(); |
Ted Kremenek | 8bef823 | 2012-01-26 21:29:00 +0000 | [diff] [blame] | 507 | ProgramStateRef PrevSt = Pred ? Pred->getState() : 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 508 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 509 | if (!PrevSt) |
| 510 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 511 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 512 | // Look at the region bindings of the current state that map to the |
| 513 | // specified symbol. Are any of them not in the previous state? |
Ted Kremenek | 18c66fd | 2011-08-15 22:09:50 +0000 | [diff] [blame] | 514 | ProgramStateManager& VMgr = cast<GRBugReporter>(BR).getStateManager(); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 515 | NotableSymbolHandler H(Sym, PrevSt, S, VMgr, Pred, PD, BR); |
| 516 | cast<GRBugReporter>(BR).getStateManager().iterBindings(N->getState(), H); |
| 517 | } |
| 518 | |
| 519 | namespace { |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 520 | class ScanNotableSymbols |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 521 | : public StoreManager::BindingsHandler { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 522 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 523 | llvm::SmallSet<SymbolRef, 10> AlreadyProcessed; |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 524 | const ExplodedNode *N; |
| 525 | const Stmt *S; |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 526 | GRBugReporter& BR; |
| 527 | PathDiagnostic& PD; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 528 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 529 | public: |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 530 | ScanNotableSymbols(const ExplodedNode *n, const Stmt *s, |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 531 | GRBugReporter& br, PathDiagnostic& pd) |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 532 | : N(n), S(s), BR(br), PD(pd) {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 533 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 534 | bool HandleBinding(StoreManager& SMgr, Store store, |
| 535 | const MemRegion* R, SVal V) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 536 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 537 | SymbolRef ScanSym = V.getAsSymbol(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 538 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 539 | if (!ScanSym) |
| 540 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 541 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 542 | if (!BR.isNotable(ScanSym)) |
| 543 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 544 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 545 | if (AlreadyProcessed.count(ScanSym)) |
| 546 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 547 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 548 | AlreadyProcessed.insert(ScanSym); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 549 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 550 | HandleNotableSymbol(N, S, ScanSym, BR, PD); |
| 551 | return true; |
| 552 | } |
| 553 | }; |
| 554 | } // end anonymous namespace |
| 555 | |
| 556 | //===----------------------------------------------------------------------===// |
| 557 | // "Minimal" path diagnostic generation algorithm. |
| 558 | //===----------------------------------------------------------------------===// |
| 559 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 560 | static void CompactPathDiagnostic(PathDiagnostic &PD, const SourceManager& SM); |
| 561 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 562 | static void GenerateMinimalPathDiagnostic(PathDiagnostic& PD, |
| 563 | PathDiagnosticBuilder &PDB, |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 564 | const ExplodedNode *N) { |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 565 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 566 | SourceManager& SMgr = PDB.getSourceManager(); |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 567 | const LocationContext *LC = PDB.LC; |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 568 | const ExplodedNode *NextNode = N->pred_empty() |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 569 | ? NULL : *(N->pred_begin()); |
| 570 | while (NextNode) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 571 | N = NextNode; |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 572 | PDB.LC = N->getLocationContext(); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 573 | NextNode = GetPredecessorNode(N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 574 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 575 | ProgramPoint P = N->getLocation(); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 576 | |
| 577 | if (const CallExit *CE = dyn_cast<CallExit>(&P)) { |
| 578 | PathDiagnosticCallPiece *C = |
| 579 | PathDiagnosticCallPiece::construct(N, *CE, SMgr); |
| 580 | PD.getActivePath().push_front(C); |
| 581 | PD.pushActivePath(&C->path); |
| 582 | continue; |
| 583 | } |
| 584 | |
| 585 | if (const CallEnter *CE = dyn_cast<CallEnter>(&P)) { |
| 586 | PD.popActivePath(); |
| 587 | // The current active path should never be empty. Either we |
| 588 | // just added a bunch of stuff to the top-level path, or |
| 589 | // we have a previous CallExit. If the front of the active |
| 590 | // path is not a PathDiagnosticCallPiece, it means that the |
| 591 | // path terminated within a function call. We must then take the |
| 592 | // current contents of the active path and place it within |
| 593 | // a new PathDiagnosticCallPiece. |
| 594 | assert(!PD.getActivePath().empty()); |
| 595 | PathDiagnosticCallPiece *C = |
| 596 | dyn_cast<PathDiagnosticCallPiece>(PD.getActivePath().front()); |
| 597 | if (!C) |
| 598 | C = PathDiagnosticCallPiece::construct(PD.getActivePath()); |
| 599 | C->setCallee(*CE, SMgr); |
| 600 | continue; |
| 601 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 602 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 603 | if (const BlockEdge *BE = dyn_cast<BlockEdge>(&P)) { |
| 604 | const CFGBlock *Src = BE->getSrc(); |
| 605 | const CFGBlock *Dst = BE->getDst(); |
| 606 | const Stmt *T = Src->getTerminator(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 607 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 608 | if (!T) |
| 609 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 610 | |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 611 | PathDiagnosticLocation Start = |
| 612 | PathDiagnosticLocation::createBegin(T, SMgr, |
| 613 | N->getLocationContext()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 614 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 615 | switch (T->getStmtClass()) { |
| 616 | default: |
| 617 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 618 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 619 | case Stmt::GotoStmtClass: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 620 | case Stmt::IndirectGotoStmtClass: { |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 621 | const Stmt *S = GetNextStmt(N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 622 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 623 | if (!S) |
| 624 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 625 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 626 | std::string sbuf; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 627 | llvm::raw_string_ostream os(sbuf); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 628 | const PathDiagnosticLocation &End = PDB.getEnclosingStmtLocation(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 629 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 630 | os << "Control jumps to line " |
Chandler Carruth | 6421162 | 2011-07-25 21:09:52 +0000 | [diff] [blame] | 631 | << End.asLocation().getExpansionLineNumber(); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 632 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 633 | os.str())); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 634 | break; |
| 635 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 636 | |
| 637 | case Stmt::SwitchStmtClass: { |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 638 | // Figure out what case arm we took. |
| 639 | std::string sbuf; |
| 640 | llvm::raw_string_ostream os(sbuf); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 641 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 642 | if (const Stmt *S = Dst->getLabel()) { |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 643 | PathDiagnosticLocation End(S, SMgr, LC); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 644 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 645 | switch (S->getStmtClass()) { |
| 646 | default: |
| 647 | os << "No cases match in the switch statement. " |
| 648 | "Control jumps to line " |
Chandler Carruth | 6421162 | 2011-07-25 21:09:52 +0000 | [diff] [blame] | 649 | << End.asLocation().getExpansionLineNumber(); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 650 | break; |
| 651 | case Stmt::DefaultStmtClass: |
| 652 | os << "Control jumps to the 'default' case at line " |
Chandler Carruth | 6421162 | 2011-07-25 21:09:52 +0000 | [diff] [blame] | 653 | << End.asLocation().getExpansionLineNumber(); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 654 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 655 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 656 | case Stmt::CaseStmtClass: { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 657 | os << "Control jumps to 'case "; |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 658 | const CaseStmt *Case = cast<CaseStmt>(S); |
| 659 | const Expr *LHS = Case->getLHS()->IgnoreParenCasts(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 660 | |
| 661 | // Determine if it is an enum. |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 662 | bool GetRawInt = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 663 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 664 | if (const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(LHS)) { |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 665 | // FIXME: Maybe this should be an assertion. Are there cases |
| 666 | // were it is not an EnumConstantDecl? |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 667 | const EnumConstantDecl *D = |
Zhongxing Xu | 03509ae | 2010-07-20 06:22:24 +0000 | [diff] [blame] | 668 | dyn_cast<EnumConstantDecl>(DR->getDecl()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 669 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 670 | if (D) { |
| 671 | GetRawInt = false; |
Benjamin Kramer | b8989f2 | 2011-10-14 18:45:37 +0000 | [diff] [blame] | 672 | os << *D; |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 673 | } |
| 674 | } |
Eli Friedman | 9ec64d6 | 2009-04-26 19:04:51 +0000 | [diff] [blame] | 675 | |
| 676 | if (GetRawInt) |
Richard Smith | a6b8b2c | 2011-10-10 18:28:20 +0000 | [diff] [blame] | 677 | os << LHS->EvaluateKnownConstInt(PDB.getASTContext()); |
Eli Friedman | 9ec64d6 | 2009-04-26 19:04:51 +0000 | [diff] [blame] | 678 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 679 | os << ":' at line " |
Chandler Carruth | 6421162 | 2011-07-25 21:09:52 +0000 | [diff] [blame] | 680 | << End.asLocation().getExpansionLineNumber(); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 681 | break; |
| 682 | } |
| 683 | } |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 684 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 685 | os.str())); |
| 686 | } |
| 687 | else { |
| 688 | os << "'Default' branch taken. "; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 689 | const PathDiagnosticLocation &End = PDB.ExecutionContinues(os, N); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 690 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 691 | os.str())); |
| 692 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 693 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 694 | break; |
| 695 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 696 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 697 | case Stmt::BreakStmtClass: |
| 698 | case Stmt::ContinueStmtClass: { |
| 699 | std::string sbuf; |
| 700 | llvm::raw_string_ostream os(sbuf); |
| 701 | PathDiagnosticLocation End = PDB.ExecutionContinues(os, N); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 702 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 703 | os.str())); |
| 704 | break; |
| 705 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 706 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 707 | // Determine control-flow for ternary '?'. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 708 | case Stmt::BinaryConditionalOperatorClass: |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 709 | case Stmt::ConditionalOperatorClass: { |
| 710 | std::string sbuf; |
| 711 | llvm::raw_string_ostream os(sbuf); |
| 712 | os << "'?' condition is "; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 713 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 714 | if (*(Src->succ_begin()+1) == Dst) |
| 715 | os << "false"; |
| 716 | else |
| 717 | os << "true"; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 718 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 719 | PathDiagnosticLocation End = PDB.ExecutionContinues(N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 720 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 721 | if (const Stmt *S = End.asStmt()) |
| 722 | End = PDB.getEnclosingStmtLocation(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 723 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 724 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 725 | os.str())); |
| 726 | break; |
| 727 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 728 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 729 | // Determine control-flow for short-circuited '&&' and '||'. |
| 730 | case Stmt::BinaryOperatorClass: { |
| 731 | if (!PDB.supportsLogicalOpControlFlow()) |
| 732 | break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 733 | |
Zhongxing Xu | 03509ae | 2010-07-20 06:22:24 +0000 | [diff] [blame] | 734 | const BinaryOperator *B = cast<BinaryOperator>(T); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 735 | std::string sbuf; |
| 736 | llvm::raw_string_ostream os(sbuf); |
| 737 | os << "Left side of '"; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 738 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 739 | if (B->getOpcode() == BO_LAnd) { |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 740 | os << "&&" << "' is "; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 741 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 742 | if (*(Src->succ_begin()+1) == Dst) { |
| 743 | os << "false"; |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 744 | PathDiagnosticLocation End(B->getLHS(), SMgr, LC); |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 745 | PathDiagnosticLocation Start = |
| 746 | PathDiagnosticLocation::createOperatorLoc(B, SMgr); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 747 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 748 | os.str())); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 749 | } |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 750 | else { |
| 751 | os << "true"; |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 752 | PathDiagnosticLocation Start(B->getLHS(), SMgr, LC); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 753 | PathDiagnosticLocation End = PDB.ExecutionContinues(N); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 754 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 755 | os.str())); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 756 | } |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 757 | } |
| 758 | else { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 759 | assert(B->getOpcode() == BO_LOr); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 760 | os << "||" << "' is "; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 761 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 762 | if (*(Src->succ_begin()+1) == Dst) { |
| 763 | os << "false"; |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 764 | PathDiagnosticLocation Start(B->getLHS(), SMgr, LC); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 765 | PathDiagnosticLocation End = PDB.ExecutionContinues(N); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 766 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 767 | os.str())); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 768 | } |
| 769 | else { |
| 770 | os << "true"; |
Anna Zaks | 220ac8c | 2011-09-15 01:08:34 +0000 | [diff] [blame] | 771 | PathDiagnosticLocation End(B->getLHS(), SMgr, LC); |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 772 | PathDiagnosticLocation Start = |
| 773 | PathDiagnosticLocation::createOperatorLoc(B, SMgr); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 774 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 775 | os.str())); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 776 | } |
| 777 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 778 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 779 | break; |
| 780 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 781 | |
| 782 | case Stmt::DoStmtClass: { |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 783 | if (*(Src->succ_begin()) == Dst) { |
| 784 | std::string sbuf; |
| 785 | llvm::raw_string_ostream os(sbuf); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 786 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 787 | os << "Loop condition is true. "; |
| 788 | PathDiagnosticLocation End = PDB.ExecutionContinues(os, N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 789 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 790 | if (const Stmt *S = End.asStmt()) |
| 791 | End = PDB.getEnclosingStmtLocation(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 792 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 793 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 794 | os.str())); |
| 795 | } |
| 796 | else { |
| 797 | PathDiagnosticLocation End = PDB.ExecutionContinues(N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 798 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 799 | if (const Stmt *S = End.asStmt()) |
| 800 | End = PDB.getEnclosingStmtLocation(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 801 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 802 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 803 | "Loop condition is false. Exiting loop")); |
| 804 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 805 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 806 | break; |
| 807 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 808 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 809 | case Stmt::WhileStmtClass: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 810 | case Stmt::ForStmtClass: { |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 811 | if (*(Src->succ_begin()+1) == Dst) { |
| 812 | std::string sbuf; |
| 813 | llvm::raw_string_ostream os(sbuf); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 814 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 815 | os << "Loop condition is false. "; |
| 816 | PathDiagnosticLocation End = PDB.ExecutionContinues(os, N); |
| 817 | if (const Stmt *S = End.asStmt()) |
| 818 | End = PDB.getEnclosingStmtLocation(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 819 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 820 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 821 | os.str())); |
| 822 | } |
| 823 | else { |
| 824 | PathDiagnosticLocation End = PDB.ExecutionContinues(N); |
| 825 | if (const Stmt *S = End.asStmt()) |
| 826 | End = PDB.getEnclosingStmtLocation(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 827 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 828 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 829 | "Loop condition is true. Entering loop body")); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 830 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 831 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 832 | break; |
| 833 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 834 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 835 | case Stmt::IfStmtClass: { |
| 836 | PathDiagnosticLocation End = PDB.ExecutionContinues(N); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 837 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 838 | if (const Stmt *S = End.asStmt()) |
| 839 | End = PDB.getEnclosingStmtLocation(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 840 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 841 | if (*(Src->succ_begin()+1) == Dst) |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 842 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 843 | "Taking false branch")); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 844 | else |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 845 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(Start, End, |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 846 | "Taking true branch")); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 847 | |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 848 | break; |
| 849 | } |
| 850 | } |
| 851 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 852 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 853 | if (NextNode) { |
Anna Zaks | 8e6431a | 2011-08-18 22:37:56 +0000 | [diff] [blame] | 854 | // Add diagnostic pieces from custom visitors. |
| 855 | BugReport *R = PDB.getBugReport(); |
| 856 | for (BugReport::visitor_iterator I = R->visitor_begin(), |
| 857 | E = R->visitor_end(); I!=E; ++I) { |
| 858 | if (PathDiagnosticPiece *p = (*I)->VisitNode(N, NextNode, PDB, *R)) |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 859 | PD.getActivePath().push_front(p); |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 860 | } |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 861 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 862 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 863 | if (const PostStmt *PS = dyn_cast<PostStmt>(&P)) { |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 864 | // Scan the region bindings, and see if a "notable" symbol has a new |
| 865 | // lval binding. |
| 866 | ScanNotableSymbols SNS(N, PS->getStmt(), PDB.getBugReporter(), PD); |
| 867 | PDB.getStateManager().iterBindings(N->getState(), SNS); |
| 868 | } |
| 869 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 870 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 871 | // After constructing the full PathDiagnostic, do a pass over it to compact |
| 872 | // PathDiagnosticPieces that occur within a macro. |
| 873 | CompactPathDiagnostic(PD, PDB.getSourceManager()); |
Ted Kremenek | 3106198 | 2009-03-31 23:00:32 +0000 | [diff] [blame] | 874 | } |
| 875 | |
| 876 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 877 | // "Extensive" PathDiagnostic generation. |
| 878 | //===----------------------------------------------------------------------===// |
| 879 | |
| 880 | static bool IsControlFlowExpr(const Stmt *S) { |
| 881 | const Expr *E = dyn_cast<Expr>(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 882 | |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 883 | if (!E) |
| 884 | return false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 885 | |
| 886 | E = E->IgnoreParenCasts(); |
| 887 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 888 | if (isa<AbstractConditionalOperator>(E)) |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 889 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 890 | |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 891 | if (const BinaryOperator *B = dyn_cast<BinaryOperator>(E)) |
| 892 | if (B->isLogicalOp()) |
| 893 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 894 | |
| 895 | return false; |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 896 | } |
| 897 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 898 | namespace { |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 899 | class ContextLocation : public PathDiagnosticLocation { |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 900 | bool IsDead; |
| 901 | public: |
| 902 | ContextLocation(const PathDiagnosticLocation &L, bool isdead = false) |
| 903 | : PathDiagnosticLocation(L), IsDead(isdead) {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 904 | |
| 905 | void markDead() { IsDead = true; } |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 906 | bool isDead() const { return IsDead; } |
| 907 | }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 908 | |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 909 | class EdgeBuilder { |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 910 | std::vector<ContextLocation> CLocs; |
| 911 | typedef std::vector<ContextLocation>::iterator iterator; |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 912 | PathDiagnostic &PD; |
| 913 | PathDiagnosticBuilder &PDB; |
| 914 | PathDiagnosticLocation PrevLoc; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 915 | |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 916 | bool IsConsumedExpr(const PathDiagnosticLocation &L); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 917 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 918 | bool containsLocation(const PathDiagnosticLocation &Container, |
| 919 | const PathDiagnosticLocation &Containee); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 920 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 921 | PathDiagnosticLocation getContextLocation(const PathDiagnosticLocation &L); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 922 | |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 923 | PathDiagnosticLocation cleanUpLocation(PathDiagnosticLocation L, |
| 924 | bool firstCharOnly = false) { |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 925 | if (const Stmt *S = L.asStmt()) { |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 926 | const Stmt *Original = S; |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 927 | while (1) { |
| 928 | // Adjust the location for some expressions that are best referenced |
| 929 | // by one of their subexpressions. |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 930 | switch (S->getStmtClass()) { |
| 931 | default: |
| 932 | break; |
| 933 | case Stmt::ParenExprClass: |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 934 | case Stmt::GenericSelectionExprClass: |
| 935 | S = cast<Expr>(S)->IgnoreParens(); |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 936 | firstCharOnly = true; |
| 937 | continue; |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 938 | case Stmt::BinaryConditionalOperatorClass: |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 939 | case Stmt::ConditionalOperatorClass: |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 940 | S = cast<AbstractConditionalOperator>(S)->getCond(); |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 941 | firstCharOnly = true; |
| 942 | continue; |
| 943 | case Stmt::ChooseExprClass: |
| 944 | S = cast<ChooseExpr>(S)->getCond(); |
| 945 | firstCharOnly = true; |
| 946 | continue; |
| 947 | case Stmt::BinaryOperatorClass: |
| 948 | S = cast<BinaryOperator>(S)->getLHS(); |
| 949 | firstCharOnly = true; |
| 950 | continue; |
| 951 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 952 | |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 953 | break; |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 954 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 955 | |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 956 | if (S != Original) |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 957 | L = PathDiagnosticLocation(S, L.getManager(), PDB.LC); |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 958 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 959 | |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 960 | if (firstCharOnly) |
Anna Zaks | 1531bb0 | 2011-09-20 01:38:47 +0000 | [diff] [blame] | 961 | L = PathDiagnosticLocation::createSingleLocation(L); |
Ted Kremenek | 9650cf3 | 2009-05-11 21:42:34 +0000 | [diff] [blame] | 962 | |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 963 | return L; |
| 964 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 965 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 966 | void popLocation() { |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 967 | if (!CLocs.back().isDead() && CLocs.back().asLocation().isFileID()) { |
Ted Kremenek | 5c7168c | 2009-04-22 20:36:26 +0000 | [diff] [blame] | 968 | // For contexts, we only one the first character as the range. |
Ted Kremenek | 07c015c | 2009-05-15 02:46:13 +0000 | [diff] [blame] | 969 | rawAddEdge(cleanUpLocation(CLocs.back(), true)); |
Ted Kremenek | 5c7168c | 2009-04-22 20:36:26 +0000 | [diff] [blame] | 970 | } |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 971 | CLocs.pop_back(); |
| 972 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 973 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 974 | public: |
| 975 | EdgeBuilder(PathDiagnostic &pd, PathDiagnosticBuilder &pdb) |
| 976 | : PD(pd), PDB(pdb) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 977 | |
Ted Kremenek | a301a67 | 2009-04-22 18:16:20 +0000 | [diff] [blame] | 978 | // If the PathDiagnostic already has pieces, add the enclosing statement |
| 979 | // of the first piece as a context as well. |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 980 | if (!PD.path.empty()) { |
| 981 | PrevLoc = (*PD.path.begin())->getLocation(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 982 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 983 | if (const Stmt *S = PrevLoc.asStmt()) |
Ted Kremenek | e1baed3 | 2009-05-05 23:13:38 +0000 | [diff] [blame] | 984 | addExtendedContext(PDB.getEnclosingStmtLocation(S).asStmt()); |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 985 | } |
| 986 | } |
| 987 | |
| 988 | ~EdgeBuilder() { |
| 989 | while (!CLocs.empty()) popLocation(); |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 990 | |
Ted Kremenek | a301a67 | 2009-04-22 18:16:20 +0000 | [diff] [blame] | 991 | // Finally, add an initial edge from the start location of the first |
| 992 | // statement (if it doesn't already exist). |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 993 | PathDiagnosticLocation L = PathDiagnosticLocation::createDeclBegin( |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 994 | PDB.LC, |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 995 | PDB.getSourceManager()); |
| 996 | if (L.isValid()) |
| 997 | rawAddEdge(L); |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 998 | } |
| 999 | |
Ted Kremenek | 5de4fdb | 2012-02-07 02:26:17 +0000 | [diff] [blame] | 1000 | void flushLocations() { |
| 1001 | while (!CLocs.empty()) |
| 1002 | popLocation(); |
| 1003 | PrevLoc = PathDiagnosticLocation(); |
| 1004 | } |
| 1005 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1006 | void addEdge(PathDiagnosticLocation NewLoc, bool alwaysAdd = false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1007 | |
Ted Kremenek | 8bd4d03 | 2009-04-28 04:23:15 +0000 | [diff] [blame] | 1008 | void rawAddEdge(PathDiagnosticLocation NewLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1009 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1010 | void addContext(const Stmt *S); |
Ted Kremenek | e1baed3 | 2009-05-05 23:13:38 +0000 | [diff] [blame] | 1011 | void addExtendedContext(const Stmt *S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1012 | }; |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1013 | } // end anonymous namespace |
| 1014 | |
| 1015 | |
| 1016 | PathDiagnosticLocation |
| 1017 | EdgeBuilder::getContextLocation(const PathDiagnosticLocation &L) { |
| 1018 | if (const Stmt *S = L.asStmt()) { |
| 1019 | if (IsControlFlowExpr(S)) |
| 1020 | return L; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1021 | |
| 1022 | return PDB.getEnclosingStmtLocation(S); |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1023 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1024 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1025 | return L; |
| 1026 | } |
| 1027 | |
| 1028 | bool EdgeBuilder::containsLocation(const PathDiagnosticLocation &Container, |
| 1029 | const PathDiagnosticLocation &Containee) { |
| 1030 | |
| 1031 | if (Container == Containee) |
| 1032 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1033 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1034 | if (Container.asDecl()) |
| 1035 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1036 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1037 | if (const Stmt *S = Containee.asStmt()) |
| 1038 | if (const Stmt *ContainerS = Container.asStmt()) { |
| 1039 | while (S) { |
| 1040 | if (S == ContainerS) |
| 1041 | return true; |
| 1042 | S = PDB.getParent(S); |
| 1043 | } |
| 1044 | return false; |
| 1045 | } |
| 1046 | |
| 1047 | // Less accurate: compare using source ranges. |
| 1048 | SourceRange ContainerR = Container.asRange(); |
| 1049 | SourceRange ContaineeR = Containee.asRange(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1050 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1051 | SourceManager &SM = PDB.getSourceManager(); |
Chandler Carruth | 4027853 | 2011-07-25 16:49:02 +0000 | [diff] [blame] | 1052 | SourceLocation ContainerRBeg = SM.getExpansionLoc(ContainerR.getBegin()); |
| 1053 | SourceLocation ContainerREnd = SM.getExpansionLoc(ContainerR.getEnd()); |
| 1054 | SourceLocation ContaineeRBeg = SM.getExpansionLoc(ContaineeR.getBegin()); |
| 1055 | SourceLocation ContaineeREnd = SM.getExpansionLoc(ContaineeR.getEnd()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1056 | |
Chandler Carruth | 6421162 | 2011-07-25 21:09:52 +0000 | [diff] [blame] | 1057 | unsigned ContainerBegLine = SM.getExpansionLineNumber(ContainerRBeg); |
| 1058 | unsigned ContainerEndLine = SM.getExpansionLineNumber(ContainerREnd); |
| 1059 | unsigned ContaineeBegLine = SM.getExpansionLineNumber(ContaineeRBeg); |
| 1060 | unsigned ContaineeEndLine = SM.getExpansionLineNumber(ContaineeREnd); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1061 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1062 | assert(ContainerBegLine <= ContainerEndLine); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1063 | assert(ContaineeBegLine <= ContaineeEndLine); |
| 1064 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1065 | return (ContainerBegLine <= ContaineeBegLine && |
| 1066 | ContainerEndLine >= ContaineeEndLine && |
| 1067 | (ContainerBegLine != ContaineeBegLine || |
Chandler Carruth | a77c031 | 2011-07-25 20:57:57 +0000 | [diff] [blame] | 1068 | SM.getExpansionColumnNumber(ContainerRBeg) <= |
| 1069 | SM.getExpansionColumnNumber(ContaineeRBeg)) && |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1070 | (ContainerEndLine != ContaineeEndLine || |
Chandler Carruth | a77c031 | 2011-07-25 20:57:57 +0000 | [diff] [blame] | 1071 | SM.getExpansionColumnNumber(ContainerREnd) >= |
| 1072 | SM.getExpansionColumnNumber(ContainerREnd))); |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1073 | } |
| 1074 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1075 | void EdgeBuilder::rawAddEdge(PathDiagnosticLocation NewLoc) { |
| 1076 | if (!PrevLoc.isValid()) { |
| 1077 | PrevLoc = NewLoc; |
| 1078 | return; |
| 1079 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1080 | |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 1081 | const PathDiagnosticLocation &NewLocClean = cleanUpLocation(NewLoc); |
| 1082 | const PathDiagnosticLocation &PrevLocClean = cleanUpLocation(PrevLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1083 | |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 1084 | if (NewLocClean.asLocation() == PrevLocClean.asLocation()) |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1085 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1086 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1087 | // FIXME: Ignore intra-macro edges for now. |
Chandler Carruth | 4027853 | 2011-07-25 16:49:02 +0000 | [diff] [blame] | 1088 | if (NewLocClean.asLocation().getExpansionLoc() == |
| 1089 | PrevLocClean.asLocation().getExpansionLoc()) |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1090 | return; |
| 1091 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1092 | PD.getActivePath().push_front(new PathDiagnosticControlFlowPiece(NewLocClean, PrevLocClean)); |
Ted Kremenek | 8c8b0ad | 2009-05-11 19:50:47 +0000 | [diff] [blame] | 1093 | PrevLoc = NewLoc; |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1094 | } |
| 1095 | |
| 1096 | void EdgeBuilder::addEdge(PathDiagnosticLocation NewLoc, bool alwaysAdd) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1097 | |
Ted Kremenek | a301a67 | 2009-04-22 18:16:20 +0000 | [diff] [blame] | 1098 | if (!alwaysAdd && NewLoc.asLocation().isMacroID()) |
| 1099 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1100 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1101 | const PathDiagnosticLocation &CLoc = getContextLocation(NewLoc); |
| 1102 | |
| 1103 | while (!CLocs.empty()) { |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1104 | ContextLocation &TopContextLoc = CLocs.back(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1105 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1106 | // Is the top location context the same as the one for the new location? |
| 1107 | if (TopContextLoc == CLoc) { |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1108 | if (alwaysAdd) { |
Ted Kremenek | 4c6f8d3 | 2009-05-04 18:15:17 +0000 | [diff] [blame] | 1109 | if (IsConsumedExpr(TopContextLoc) && |
| 1110 | !IsControlFlowExpr(TopContextLoc.asStmt())) |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1111 | TopContextLoc.markDead(); |
| 1112 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1113 | rawAddEdge(NewLoc); |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1114 | } |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1115 | |
| 1116 | return; |
| 1117 | } |
| 1118 | |
| 1119 | if (containsLocation(TopContextLoc, CLoc)) { |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1120 | if (alwaysAdd) { |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1121 | rawAddEdge(NewLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1122 | |
Ted Kremenek | 4c6f8d3 | 2009-05-04 18:15:17 +0000 | [diff] [blame] | 1123 | if (IsConsumedExpr(CLoc) && !IsControlFlowExpr(CLoc.asStmt())) { |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1124 | CLocs.push_back(ContextLocation(CLoc, true)); |
| 1125 | return; |
| 1126 | } |
| 1127 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1128 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1129 | CLocs.push_back(CLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1130 | return; |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1131 | } |
| 1132 | |
| 1133 | // Context does not contain the location. Flush it. |
| 1134 | popLocation(); |
| 1135 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1136 | |
Ted Kremenek | 5c7168c | 2009-04-22 20:36:26 +0000 | [diff] [blame] | 1137 | // If we reach here, there is no enclosing context. Just add the edge. |
| 1138 | rawAddEdge(NewLoc); |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1139 | } |
| 1140 | |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1141 | bool EdgeBuilder::IsConsumedExpr(const PathDiagnosticLocation &L) { |
| 1142 | if (const Expr *X = dyn_cast_or_null<Expr>(L.asStmt())) |
| 1143 | return PDB.getParentMap().isConsumedExpr(X) && !IsControlFlowExpr(X); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1144 | |
Ted Kremenek | 8f9b1b3 | 2009-05-01 16:08:09 +0000 | [diff] [blame] | 1145 | return false; |
| 1146 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1147 | |
Ted Kremenek | e1baed3 | 2009-05-05 23:13:38 +0000 | [diff] [blame] | 1148 | void EdgeBuilder::addExtendedContext(const Stmt *S) { |
| 1149 | if (!S) |
| 1150 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1151 | |
| 1152 | const Stmt *Parent = PDB.getParent(S); |
Ted Kremenek | e1baed3 | 2009-05-05 23:13:38 +0000 | [diff] [blame] | 1153 | while (Parent) { |
| 1154 | if (isa<CompoundStmt>(Parent)) |
| 1155 | Parent = PDB.getParent(Parent); |
| 1156 | else |
| 1157 | break; |
| 1158 | } |
| 1159 | |
| 1160 | if (Parent) { |
| 1161 | switch (Parent->getStmtClass()) { |
| 1162 | case Stmt::DoStmtClass: |
| 1163 | case Stmt::ObjCAtSynchronizedStmtClass: |
| 1164 | addContext(Parent); |
| 1165 | default: |
| 1166 | break; |
| 1167 | } |
| 1168 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1169 | |
Ted Kremenek | e1baed3 | 2009-05-05 23:13:38 +0000 | [diff] [blame] | 1170 | addContext(S); |
| 1171 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1172 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1173 | void EdgeBuilder::addContext(const Stmt *S) { |
| 1174 | if (!S) |
| 1175 | return; |
| 1176 | |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 1177 | PathDiagnosticLocation L(S, PDB.getSourceManager(), PDB.LC); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1178 | |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1179 | while (!CLocs.empty()) { |
| 1180 | const PathDiagnosticLocation &TopContextLoc = CLocs.back(); |
| 1181 | |
| 1182 | // Is the top location context the same as the one for the new location? |
| 1183 | if (TopContextLoc == L) |
| 1184 | return; |
| 1185 | |
| 1186 | if (containsLocation(TopContextLoc, L)) { |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1187 | CLocs.push_back(L); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1188 | return; |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1189 | } |
| 1190 | |
| 1191 | // Context does not contain the location. Flush it. |
| 1192 | popLocation(); |
| 1193 | } |
| 1194 | |
| 1195 | CLocs.push_back(L); |
| 1196 | } |
| 1197 | |
| 1198 | static void GenerateExtensivePathDiagnostic(PathDiagnostic& PD, |
| 1199 | PathDiagnosticBuilder &PDB, |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1200 | const ExplodedNode *N) { |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1201 | EdgeBuilder EB(PD, PDB); |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 1202 | const SourceManager& SM = PDB.getSourceManager(); |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1203 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1204 | const ExplodedNode *NextNode = N->pred_empty() ? NULL : *(N->pred_begin()); |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1205 | while (NextNode) { |
| 1206 | N = NextNode; |
| 1207 | NextNode = GetPredecessorNode(N); |
| 1208 | ProgramPoint P = N->getLocation(); |
| 1209 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1210 | do { |
Ted Kremenek | 5de4fdb | 2012-02-07 02:26:17 +0000 | [diff] [blame] | 1211 | if (const CallExit *CE = dyn_cast<CallExit>(&P)) { |
| 1212 | const StackFrameContext *LCtx = |
| 1213 | CE->getLocationContext()->getCurrentStackFrame(); |
| 1214 | PathDiagnosticLocation Loc(LCtx->getCallSite(), |
| 1215 | PDB.getSourceManager(), |
| 1216 | LCtx); |
| 1217 | EB.addEdge(Loc, true); |
| 1218 | EB.flushLocations(); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1219 | PathDiagnosticCallPiece *C = |
| 1220 | PathDiagnosticCallPiece::construct(N, *CE, SM); |
| 1221 | PD.getActivePath().push_front(C); |
| 1222 | PD.pushActivePath(&C->path); |
Ted Kremenek | 5de4fdb | 2012-02-07 02:26:17 +0000 | [diff] [blame] | 1223 | break; |
| 1224 | } |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 1225 | |
| 1226 | // Note that is important that we update the LocationContext |
| 1227 | // after looking at CallExits. CallExit basically adds an |
| 1228 | // edge in the *caller*, so we don't want to update the LocationContext |
| 1229 | // too soon. |
| 1230 | PDB.LC = N->getLocationContext(); |
| 1231 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1232 | // Pop the call hierarchy if we are done walking the contents |
| 1233 | // of a function call. |
| 1234 | if (const CallEnter *CE = dyn_cast<CallEnter>(&P)) { |
| 1235 | PD.popActivePath(); |
| 1236 | // The current active path should never be empty. Either we |
| 1237 | // just added a bunch of stuff to the top-level path, or |
| 1238 | // we have a previous CallExit. If the front of the active |
| 1239 | // path is not a PathDiagnosticCallPiece, it means that the |
| 1240 | // path terminated within a function call. We must then take the |
| 1241 | // current contents of the active path and place it within |
| 1242 | // a new PathDiagnosticCallPiece. |
| 1243 | assert(!PD.getActivePath().empty()); |
| 1244 | PathDiagnosticCallPiece *C = |
| 1245 | dyn_cast<PathDiagnosticCallPiece>(PD.getActivePath().front()); |
| 1246 | if (!C) |
| 1247 | C = PathDiagnosticCallPiece::construct(PD.getActivePath()); |
| 1248 | C->setCallee(*CE, SM); |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 1249 | EB.flushLocations(); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1250 | EB.addContext(CE->getCallExpr()); |
| 1251 | break; |
| 1252 | } |
Ted Kremenek | 5de4fdb | 2012-02-07 02:26:17 +0000 | [diff] [blame] | 1253 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1254 | // Block edges. |
Ted Kremenek | 5de4fdb | 2012-02-07 02:26:17 +0000 | [diff] [blame] | 1255 | if (const BlockEdge *BE = dyn_cast<BlockEdge>(&P)) { |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1256 | const CFGBlock &Blk = *BE->getSrc(); |
| 1257 | const Stmt *Term = Blk.getTerminator(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1258 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1259 | // Are we jumping to the head of a loop? Add a special diagnostic. |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 1260 | if (const Stmt *Loop = BE->getDst()->getLoopTarget()) { |
Ted Kremenek | 59950d3 | 2012-02-24 07:12:52 +0000 | [diff] [blame] | 1261 | PathDiagnosticLocation L(Loop, SM, PDB.LC); |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 1262 | const CompoundStmt *CS = NULL; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1263 | |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 1264 | if (!Term) { |
| 1265 | if (const ForStmt *FS = dyn_cast<ForStmt>(Loop)) |
| 1266 | CS = dyn_cast<CompoundStmt>(FS->getBody()); |
| 1267 | else if (const WhileStmt *WS = dyn_cast<WhileStmt>(Loop)) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1268 | CS = dyn_cast<CompoundStmt>(WS->getBody()); |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 1269 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1270 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1271 | PathDiagnosticEventPiece *p = |
| 1272 | new PathDiagnosticEventPiece(L, |
Ted Kremenek | 07c015c | 2009-05-15 02:46:13 +0000 | [diff] [blame] | 1273 | "Looping back to the head of the loop"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1274 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1275 | EB.addEdge(p->getLocation(), true); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1276 | PD.getActivePath().push_front(p); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1277 | |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 1278 | if (CS) { |
Anna Zaks | 0cd5948 | 2011-09-16 19:18:30 +0000 | [diff] [blame] | 1279 | PathDiagnosticLocation BL = |
| 1280 | PathDiagnosticLocation::createEndBrace(CS, SM); |
Ted Kremenek | 07c015c | 2009-05-15 02:46:13 +0000 | [diff] [blame] | 1281 | EB.addEdge(BL); |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1282 | } |
Ted Kremenek | 8bd4d03 | 2009-04-28 04:23:15 +0000 | [diff] [blame] | 1283 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1284 | |
Ted Kremenek | ddb7bab | 2009-05-15 01:50:15 +0000 | [diff] [blame] | 1285 | if (Term) |
| 1286 | EB.addContext(Term); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1287 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1288 | break; |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1289 | } |
| 1290 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1291 | if (const BlockEntrance *BE = dyn_cast<BlockEntrance>(&P)) { |
Ted Kremenek | 3c0349e | 2011-03-01 03:15:10 +0000 | [diff] [blame] | 1292 | if (const CFGStmt *S = BE->getFirstElement().getAs<CFGStmt>()) { |
| 1293 | const Stmt *stmt = S->getStmt(); |
| 1294 | if (IsControlFlowExpr(stmt)) { |
Zhongxing Xu | b36cd3e | 2010-09-16 01:25:47 +0000 | [diff] [blame] | 1295 | // Add the proper context for '&&', '||', and '?'. |
Ted Kremenek | 3c0349e | 2011-03-01 03:15:10 +0000 | [diff] [blame] | 1296 | EB.addContext(stmt); |
Zhongxing Xu | b36cd3e | 2010-09-16 01:25:47 +0000 | [diff] [blame] | 1297 | } |
| 1298 | else |
Ted Kremenek | 3c0349e | 2011-03-01 03:15:10 +0000 | [diff] [blame] | 1299 | EB.addExtendedContext(PDB.getEnclosingStmtLocation(stmt).asStmt()); |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1300 | } |
Zhongxing Xu | b36cd3e | 2010-09-16 01:25:47 +0000 | [diff] [blame] | 1301 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1302 | break; |
| 1303 | } |
Ted Kremenek | 5de4fdb | 2012-02-07 02:26:17 +0000 | [diff] [blame] | 1304 | |
| 1305 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1306 | } while (0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1307 | |
Ted Kremenek | dd986cc | 2009-05-07 00:45:33 +0000 | [diff] [blame] | 1308 | if (!NextNode) |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1309 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1310 | |
Anna Zaks | 8e6431a | 2011-08-18 22:37:56 +0000 | [diff] [blame] | 1311 | // Add pieces from custom visitors. |
| 1312 | BugReport *R = PDB.getBugReport(); |
| 1313 | for (BugReport::visitor_iterator I = R->visitor_begin(), |
| 1314 | E = R->visitor_end(); I!=E; ++I) { |
| 1315 | if (PathDiagnosticPiece *p = (*I)->VisitNode(N, NextNode, PDB, *R)) { |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 1316 | const PathDiagnosticLocation &Loc = p->getLocation(); |
| 1317 | EB.addEdge(Loc, true); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1318 | PD.getActivePath().push_front(p); |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 1319 | if (const Stmt *S = Loc.asStmt()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1320 | EB.addExtendedContext(PDB.getEnclosingStmtLocation(S).asStmt()); |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 1321 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1322 | } |
Ted Kremenek | 14856d7 | 2009-04-06 23:06:54 +0000 | [diff] [blame] | 1323 | } |
| 1324 | } |
| 1325 | |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 1326 | //===----------------------------------------------------------------------===// |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1327 | // Methods for BugType and subclasses. |
| 1328 | //===----------------------------------------------------------------------===// |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1329 | BugType::~BugType() { } |
| 1330 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1331 | void BugType::FlushReports(BugReporter &BR) {} |
Ted Kremenek | bb77e9b | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 1332 | |
David Blaikie | 99ba9e3 | 2011-12-20 02:48:34 +0000 | [diff] [blame] | 1333 | void BuiltinBug::anchor() {} |
| 1334 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1335 | //===----------------------------------------------------------------------===// |
| 1336 | // Methods for BugReport and subclasses. |
| 1337 | //===----------------------------------------------------------------------===// |
Anna Zaks | e172e8b | 2011-08-17 23:00:25 +0000 | [diff] [blame] | 1338 | |
David Blaikie | 99ba9e3 | 2011-12-20 02:48:34 +0000 | [diff] [blame] | 1339 | void BugReport::NodeResolver::anchor() {} |
| 1340 | |
Anna Zaks | 8e6431a | 2011-08-18 22:37:56 +0000 | [diff] [blame] | 1341 | void BugReport::addVisitor(BugReporterVisitor* visitor) { |
| 1342 | if (!visitor) |
| 1343 | return; |
| 1344 | |
| 1345 | llvm::FoldingSetNodeID ID; |
| 1346 | visitor->Profile(ID); |
| 1347 | void *InsertPos; |
| 1348 | |
| 1349 | if (CallbacksSet.FindNodeOrInsertPos(ID, InsertPos)) { |
| 1350 | delete visitor; |
| 1351 | return; |
| 1352 | } |
| 1353 | |
| 1354 | CallbacksSet.InsertNode(visitor, InsertPos); |
| 1355 | Callbacks = F.add(visitor, Callbacks); |
| 1356 | } |
| 1357 | |
| 1358 | BugReport::~BugReport() { |
| 1359 | for (visitor_iterator I = visitor_begin(), E = visitor_end(); I != E; ++I) { |
Anna Zaks | dc757b0 | 2011-08-19 23:21:56 +0000 | [diff] [blame] | 1360 | delete *I; |
Anna Zaks | 8e6431a | 2011-08-18 22:37:56 +0000 | [diff] [blame] | 1361 | } |
| 1362 | } |
Anna Zaks | e172e8b | 2011-08-17 23:00:25 +0000 | [diff] [blame] | 1363 | |
| 1364 | void BugReport::Profile(llvm::FoldingSetNodeID& hash) const { |
| 1365 | hash.AddPointer(&BT); |
Anna Zaks | e172e8b | 2011-08-17 23:00:25 +0000 | [diff] [blame] | 1366 | hash.AddString(Description); |
Anna Zaks | ca8e36e | 2012-02-23 21:38:21 +0000 | [diff] [blame] | 1367 | if (UniqueingLocation.isValid()) { |
| 1368 | UniqueingLocation.Profile(hash); |
| 1369 | } else if (Location.isValid()) { |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1370 | Location.Profile(hash); |
| 1371 | } else { |
| 1372 | assert(ErrorNode); |
| 1373 | hash.AddPointer(GetCurrentOrPreviousStmt(ErrorNode)); |
| 1374 | } |
Anna Zaks | e172e8b | 2011-08-17 23:00:25 +0000 | [diff] [blame] | 1375 | |
| 1376 | for (SmallVectorImpl<SourceRange>::const_iterator I = |
| 1377 | Ranges.begin(), E = Ranges.end(); I != E; ++I) { |
| 1378 | const SourceRange range = *I; |
| 1379 | if (!range.isValid()) |
| 1380 | continue; |
| 1381 | hash.AddInteger(range.getBegin().getRawEncoding()); |
| 1382 | hash.AddInteger(range.getEnd().getRawEncoding()); |
| 1383 | } |
| 1384 | } |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1385 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1386 | const Stmt *BugReport::getStmt() const { |
Anna Zaks | e172e8b | 2011-08-17 23:00:25 +0000 | [diff] [blame] | 1387 | if (!ErrorNode) |
| 1388 | return 0; |
| 1389 | |
Tom Care | 212f6d3 | 2010-09-16 03:50:38 +0000 | [diff] [blame] | 1390 | ProgramPoint ProgP = ErrorNode->getLocation(); |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 1391 | const Stmt *S = NULL; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1392 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1393 | if (BlockEntrance *BE = dyn_cast<BlockEntrance>(&ProgP)) { |
Zhongxing Xu | fafd383 | 2009-08-20 01:23:34 +0000 | [diff] [blame] | 1394 | CFGBlock &Exit = ProgP.getLocationContext()->getCFG()->getExit(); |
Zhongxing Xu | 50d5bc4 | 2009-08-18 08:46:04 +0000 | [diff] [blame] | 1395 | if (BE->getBlock() == &Exit) |
Tom Care | 212f6d3 | 2010-09-16 03:50:38 +0000 | [diff] [blame] | 1396 | S = GetPreviousStmt(ErrorNode); |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1397 | } |
Ted Kremenek | 5f85e17 | 2009-07-22 22:35:28 +0000 | [diff] [blame] | 1398 | if (!S) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1399 | S = GetStmt(ProgP); |
| 1400 | |
| 1401 | return S; |
Ted Kremenek | bb77e9b | 2008-05-01 22:50:36 +0000 | [diff] [blame] | 1402 | } |
| 1403 | |
Argyrios Kyrtzidis | 640ccf0 | 2010-12-04 01:12:15 +0000 | [diff] [blame] | 1404 | std::pair<BugReport::ranges_iterator, BugReport::ranges_iterator> |
Anna Zaks | e172e8b | 2011-08-17 23:00:25 +0000 | [diff] [blame] | 1405 | BugReport::getRanges() { |
| 1406 | // If no custom ranges, add the range of the statement corresponding to |
| 1407 | // the error node. |
| 1408 | if (Ranges.empty()) { |
| 1409 | if (const Expr *E = dyn_cast_or_null<Expr>(getStmt())) |
| 1410 | addRange(E->getSourceRange()); |
| 1411 | else |
| 1412 | return std::make_pair(ranges_iterator(), ranges_iterator()); |
| 1413 | } |
| 1414 | |
Anna Zaks | 1492426 | 2011-08-24 20:31:06 +0000 | [diff] [blame] | 1415 | // User-specified absence of range info. |
| 1416 | if (Ranges.size() == 1 && !Ranges.begin()->isValid()) |
| 1417 | return std::make_pair(ranges_iterator(), ranges_iterator()); |
| 1418 | |
Anna Zaks | e172e8b | 2011-08-17 23:00:25 +0000 | [diff] [blame] | 1419 | return std::make_pair(Ranges.begin(), Ranges.end()); |
Ted Kremenek | f1ae705 | 2008-04-03 17:57:38 +0000 | [diff] [blame] | 1420 | } |
| 1421 | |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1422 | PathDiagnosticLocation BugReport::getLocation(const SourceManager &SM) const { |
Anna Zaks | b7530a4 | 2011-08-17 23:21:23 +0000 | [diff] [blame] | 1423 | if (ErrorNode) { |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1424 | assert(!Location.isValid() && |
Anna Zaks | b7530a4 | 2011-08-17 23:21:23 +0000 | [diff] [blame] | 1425 | "Either Location or ErrorNode should be specified but not both."); |
| 1426 | |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1427 | if (const Stmt *S = GetCurrentOrPreviousStmt(ErrorNode)) { |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1428 | const LocationContext *LC = ErrorNode->getLocationContext(); |
| 1429 | |
Ted Kremenek | 9b5e505 | 2009-02-27 20:05:10 +0000 | [diff] [blame] | 1430 | // For member expressions, return the location of the '.' or '->'. |
Ted Kremenek | 5b9bd21 | 2009-09-11 22:07:28 +0000 | [diff] [blame] | 1431 | if (const MemberExpr *ME = dyn_cast<MemberExpr>(S)) |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1432 | return PathDiagnosticLocation::createMemberLoc(ME, SM); |
Ted Kremenek | 5b9bd21 | 2009-09-11 22:07:28 +0000 | [diff] [blame] | 1433 | // For binary operators, return the location of the operator. |
| 1434 | if (const BinaryOperator *B = dyn_cast<BinaryOperator>(S)) |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1435 | return PathDiagnosticLocation::createOperatorLoc(B, SM); |
Ted Kremenek | 9b5e505 | 2009-02-27 20:05:10 +0000 | [diff] [blame] | 1436 | |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1437 | return PathDiagnosticLocation::createBegin(S, SM, LC); |
Ted Kremenek | 9b5e505 | 2009-02-27 20:05:10 +0000 | [diff] [blame] | 1438 | } |
Anna Zaks | b7530a4 | 2011-08-17 23:21:23 +0000 | [diff] [blame] | 1439 | } else { |
| 1440 | assert(Location.isValid()); |
| 1441 | return Location; |
| 1442 | } |
| 1443 | |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1444 | return PathDiagnosticLocation(); |
Ted Kremenek | d2f642b | 2008-04-14 17:39:48 +0000 | [diff] [blame] | 1445 | } |
| 1446 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1447 | //===----------------------------------------------------------------------===// |
| 1448 | // Methods for BugReporter and subclasses. |
| 1449 | //===----------------------------------------------------------------------===// |
| 1450 | |
| 1451 | BugReportEquivClass::~BugReportEquivClass() { |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 1452 | for (iterator I=begin(), E=end(); I!=E; ++I) delete *I; |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1453 | } |
| 1454 | |
Zhongxing Xu | a2f4ec0 | 2009-09-05 06:06:49 +0000 | [diff] [blame] | 1455 | GRBugReporter::~GRBugReporter() { } |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1456 | BugReporterData::~BugReporterData() {} |
| 1457 | |
Zhongxing Xu | 38b02b9 | 2009-08-06 06:28:40 +0000 | [diff] [blame] | 1458 | ExplodedGraph &GRBugReporter::getGraph() { return Eng.getGraph(); } |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1459 | |
Ted Kremenek | 18c66fd | 2011-08-15 22:09:50 +0000 | [diff] [blame] | 1460 | ProgramStateManager& |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1461 | GRBugReporter::getStateManager() { return Eng.getStateManager(); } |
| 1462 | |
Anna Zaks | 3b030a2 | 2011-08-19 01:57:09 +0000 | [diff] [blame] | 1463 | BugReporter::~BugReporter() { |
| 1464 | FlushReports(); |
| 1465 | |
| 1466 | // Free the bug reports we are tracking. |
| 1467 | typedef std::vector<BugReportEquivClass *> ContTy; |
| 1468 | for (ContTy::iterator I = EQClassesVector.begin(), E = EQClassesVector.end(); |
| 1469 | I != E; ++I) { |
| 1470 | delete *I; |
| 1471 | } |
| 1472 | } |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1473 | |
| 1474 | void BugReporter::FlushReports() { |
| 1475 | if (BugTypes.isEmpty()) |
| 1476 | return; |
| 1477 | |
| 1478 | // First flush the warnings for each BugType. This may end up creating new |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1479 | // warnings and new BugTypes. |
| 1480 | // FIXME: Only NSErrorChecker needs BugType's FlushReports. |
| 1481 | // Turn NSErrorChecker into a proper checker and remove this. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1482 | SmallVector<const BugType*, 16> bugTypes; |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1483 | for (BugTypesTy::iterator I=BugTypes.begin(), E=BugTypes.end(); I!=E; ++I) |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1484 | bugTypes.push_back(*I); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1485 | for (SmallVector<const BugType*, 16>::iterator |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1486 | I = bugTypes.begin(), E = bugTypes.end(); I != E; ++I) |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1487 | const_cast<BugType*>(*I)->FlushReports(*this); |
| 1488 | |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1489 | typedef llvm::FoldingSet<BugReportEquivClass> SetTy; |
| 1490 | for (SetTy::iterator EI=EQClasses.begin(), EE=EQClasses.end(); EI!=EE;++EI){ |
| 1491 | BugReportEquivClass& EQ = *EI; |
| 1492 | FlushReport(EQ); |
Ted Kremenek | 94826a7 | 2008-04-03 04:59:14 +0000 | [diff] [blame] | 1493 | } |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1494 | |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1495 | // BugReporter owns and deletes only BugTypes created implicitly through |
| 1496 | // EmitBasicReport. |
| 1497 | // FIXME: There are leaks from checkers that assume that the BugTypes they |
| 1498 | // create will be destroyed by the BugReporter. |
| 1499 | for (llvm::StringMap<BugType*>::iterator |
| 1500 | I = StrBugTypes.begin(), E = StrBugTypes.end(); I != E; ++I) |
| 1501 | delete I->second; |
| 1502 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1503 | // Remove all references to the BugType objects. |
Ted Kremenek | 3baf672 | 2010-11-24 00:54:37 +0000 | [diff] [blame] | 1504 | BugTypes = F.getEmptySet(); |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1505 | } |
| 1506 | |
| 1507 | //===----------------------------------------------------------------------===// |
| 1508 | // PathDiagnostics generation. |
| 1509 | //===----------------------------------------------------------------------===// |
| 1510 | |
Zhongxing Xu | 38b02b9 | 2009-08-06 06:28:40 +0000 | [diff] [blame] | 1511 | static std::pair<std::pair<ExplodedGraph*, NodeBackMap*>, |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1512 | std::pair<ExplodedNode*, unsigned> > |
Zhongxing Xu | 38b02b9 | 2009-08-06 06:28:40 +0000 | [diff] [blame] | 1513 | MakeReportGraph(const ExplodedGraph* G, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1514 | SmallVectorImpl<const ExplodedNode*> &nodes) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1515 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1516 | // Create the trimmed graph. It will contain the shortest paths from the |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1517 | // error nodes to the root. In the new graph we should only have one |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1518 | // error node unless there are two or more error nodes with the same minimum |
| 1519 | // path length. |
Zhongxing Xu | 38b02b9 | 2009-08-06 06:28:40 +0000 | [diff] [blame] | 1520 | ExplodedGraph* GTrim; |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1521 | InterExplodedGraphMap* NMap; |
Ted Kremenek | fe9e543 | 2009-02-18 03:48:14 +0000 | [diff] [blame] | 1522 | |
| 1523 | llvm::DenseMap<const void*, const void*> InverseMap; |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1524 | llvm::tie(GTrim, NMap) = G->Trim(nodes.data(), nodes.data() + nodes.size(), |
| 1525 | &InverseMap); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1526 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1527 | // Create owning pointers for GTrim and NMap just to ensure that they are |
| 1528 | // released when this function exists. |
Dylan Noblesmith | 6f42b62 | 2012-02-05 02:12:40 +0000 | [diff] [blame] | 1529 | OwningPtr<ExplodedGraph> AutoReleaseGTrim(GTrim); |
| 1530 | OwningPtr<InterExplodedGraphMap> AutoReleaseNMap(NMap); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1531 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1532 | // Find the (first) error node in the trimmed graph. We just need to consult |
| 1533 | // the node map (NMap) which maps from nodes in the original graph to nodes |
| 1534 | // in the new graph. |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1535 | |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1536 | std::queue<const ExplodedNode*> WS; |
Zhongxing Xu | 38b02b9 | 2009-08-06 06:28:40 +0000 | [diff] [blame] | 1537 | typedef llvm::DenseMap<const ExplodedNode*, unsigned> IndexMapTy; |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1538 | IndexMapTy IndexMap; |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1539 | |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1540 | for (unsigned nodeIndex = 0 ; nodeIndex < nodes.size(); ++nodeIndex) { |
| 1541 | const ExplodedNode *originalNode = nodes[nodeIndex]; |
| 1542 | if (const ExplodedNode *N = NMap->getMappedNode(originalNode)) { |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1543 | WS.push(N); |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1544 | IndexMap[originalNode] = nodeIndex; |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1545 | } |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1546 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1547 | |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1548 | assert(!WS.empty() && "No error node found in the trimmed graph."); |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1549 | |
| 1550 | // Create a new (third!) graph with a single path. This is the graph |
| 1551 | // that will be returned to the caller. |
Zhongxing Xu | c77a551 | 2010-07-01 07:10:59 +0000 | [diff] [blame] | 1552 | ExplodedGraph *GNew = new ExplodedGraph(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1553 | |
Ted Kremenek | 10aa554 | 2009-03-12 23:41:59 +0000 | [diff] [blame] | 1554 | // Sometimes the trimmed graph can contain a cycle. Perform a reverse BFS |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1555 | // to the root node, and then construct a new graph that contains only |
| 1556 | // a single path. |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 1557 | llvm::DenseMap<const void*,unsigned> Visited; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1558 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1559 | unsigned cnt = 0; |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1560 | const ExplodedNode *Root = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1561 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1562 | while (!WS.empty()) { |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1563 | const ExplodedNode *Node = WS.front(); |
Ted Kremenek | 10aa554 | 2009-03-12 23:41:59 +0000 | [diff] [blame] | 1564 | WS.pop(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1565 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1566 | if (Visited.find(Node) != Visited.end()) |
| 1567 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1568 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1569 | Visited[Node] = cnt++; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1570 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1571 | if (Node->pred_empty()) { |
| 1572 | Root = Node; |
| 1573 | break; |
| 1574 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1575 | |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1576 | for (ExplodedNode::const_pred_iterator I=Node->pred_begin(), |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1577 | E=Node->pred_end(); I!=E; ++I) |
Ted Kremenek | 10aa554 | 2009-03-12 23:41:59 +0000 | [diff] [blame] | 1578 | WS.push(*I); |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1579 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1580 | |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1581 | assert(Root); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1582 | |
Ted Kremenek | 10aa554 | 2009-03-12 23:41:59 +0000 | [diff] [blame] | 1583 | // Now walk from the root down the BFS path, always taking the successor |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1584 | // with the lowest number. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1585 | ExplodedNode *Last = 0, *First = 0; |
Ted Kremenek | fe9e543 | 2009-02-18 03:48:14 +0000 | [diff] [blame] | 1586 | NodeBackMap *BM = new NodeBackMap(); |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1587 | unsigned NodeIndex = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1588 | |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1589 | for ( const ExplodedNode *N = Root ;;) { |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1590 | // Lookup the number associated with the current node. |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 1591 | llvm::DenseMap<const void*,unsigned>::iterator I = Visited.find(N); |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1592 | assert(I != Visited.end()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1593 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1594 | // Create the equivalent node in the new graph with the same state |
| 1595 | // and location. |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1596 | ExplodedNode *NewN = GNew->getNode(N->getLocation(), N->getState()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1597 | |
Ted Kremenek | fe9e543 | 2009-02-18 03:48:14 +0000 | [diff] [blame] | 1598 | // Store the mapping to the original node. |
| 1599 | llvm::DenseMap<const void*, const void*>::iterator IMitr=InverseMap.find(N); |
| 1600 | assert(IMitr != InverseMap.end() && "No mapping to original node."); |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1601 | (*BM)[NewN] = (const ExplodedNode*) IMitr->second; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1602 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1603 | // Link up the new node with the previous node. |
| 1604 | if (Last) |
Ted Kremenek | 5fe4d9d | 2009-10-07 00:42:52 +0000 | [diff] [blame] | 1605 | NewN->addPredecessor(Last, *GNew); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1606 | |
Ted Kremenek | a43a1eb | 2008-04-23 23:02:12 +0000 | [diff] [blame] | 1607 | Last = NewN; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1608 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1609 | // Are we at the final node? |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1610 | IndexMapTy::iterator IMI = |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1611 | IndexMap.find((const ExplodedNode*)(IMitr->second)); |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1612 | if (IMI != IndexMap.end()) { |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1613 | First = NewN; |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1614 | NodeIndex = IMI->second; |
Ted Kremenek | c1da441 | 2008-06-17 19:14:06 +0000 | [diff] [blame] | 1615 | break; |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1616 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1617 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1618 | // Find the next successor node. We choose the node that is marked |
| 1619 | // with the lowest DFS number. |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1620 | ExplodedNode::const_succ_iterator SI = N->succ_begin(); |
| 1621 | ExplodedNode::const_succ_iterator SE = N->succ_end(); |
Ted Kremenek | c1da441 | 2008-06-17 19:14:06 +0000 | [diff] [blame] | 1622 | N = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1623 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1624 | for (unsigned MinVal = 0; SI != SE; ++SI) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1625 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1626 | I = Visited.find(*SI); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1627 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1628 | if (I == Visited.end()) |
| 1629 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1630 | |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1631 | if (!N || I->second < MinVal) { |
| 1632 | N = *SI; |
| 1633 | MinVal = I->second; |
Ted Kremenek | c1da441 | 2008-06-17 19:14:06 +0000 | [diff] [blame] | 1634 | } |
Ted Kremenek | 331b0ac | 2008-06-18 05:34:07 +0000 | [diff] [blame] | 1635 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1636 | |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1637 | assert(N); |
Ted Kremenek | a43a1eb | 2008-04-23 23:02:12 +0000 | [diff] [blame] | 1638 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1639 | |
Ted Kremenek | 938332c | 2009-05-16 01:11:58 +0000 | [diff] [blame] | 1640 | assert(First); |
| 1641 | |
Ted Kremenek | fe9e543 | 2009-02-18 03:48:14 +0000 | [diff] [blame] | 1642 | return std::make_pair(std::make_pair(GNew, BM), |
| 1643 | std::make_pair(First, NodeIndex)); |
Ted Kremenek | a43a1eb | 2008-04-23 23:02:12 +0000 | [diff] [blame] | 1644 | } |
| 1645 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1646 | /// CompactPathDiagnostic - This function postprocesses a PathDiagnostic object |
| 1647 | /// and collapses PathDiagosticPieces that are expanded by macros. |
| 1648 | static void CompactPathDiagnostic(PathDiagnostic &PD, const SourceManager& SM) { |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1649 | typedef std::vector<std::pair<IntrusiveRefCntPtr<PathDiagnosticMacroPiece>, |
| 1650 | SourceLocation> > MacroStackTy; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1651 | |
Dylan Noblesmith | c93dc78 | 2012-02-20 14:00:23 +0000 | [diff] [blame] | 1652 | typedef std::vector<IntrusiveRefCntPtr<PathDiagnosticPiece> > |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1653 | PiecesTy; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1654 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1655 | MacroStackTy MacroStack; |
| 1656 | PiecesTy Pieces; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1657 | |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1658 | for (PathPieces::const_iterator I = PD.path.begin(), E = PD.path.end(); |
| 1659 | I!=E; ++I) { |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1660 | // Get the location of the PathDiagnosticPiece. |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 1661 | const FullSourceLoc Loc = (*I)->getLocation().asLocation(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1662 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1663 | // Determine the instantiation location, which is the location we group |
| 1664 | // related PathDiagnosticPieces. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1665 | SourceLocation InstantiationLoc = Loc.isMacroID() ? |
Chandler Carruth | 4027853 | 2011-07-25 16:49:02 +0000 | [diff] [blame] | 1666 | SM.getExpansionLoc(Loc) : |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1667 | SourceLocation(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1668 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1669 | if (Loc.isFileID()) { |
| 1670 | MacroStack.clear(); |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 1671 | Pieces.push_back(*I); |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1672 | continue; |
| 1673 | } |
| 1674 | |
| 1675 | assert(Loc.isMacroID()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1676 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1677 | // Is the PathDiagnosticPiece within the same macro group? |
| 1678 | if (!MacroStack.empty() && InstantiationLoc == MacroStack.back().second) { |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 1679 | MacroStack.back().first->subPieces.push_back(*I); |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1680 | continue; |
| 1681 | } |
| 1682 | |
| 1683 | // We aren't in the same group. Are we descending into a new macro |
| 1684 | // or are part of an old one? |
Dylan Noblesmith | c93dc78 | 2012-02-20 14:00:23 +0000 | [diff] [blame] | 1685 | IntrusiveRefCntPtr<PathDiagnosticMacroPiece> MacroGroup; |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1686 | |
| 1687 | SourceLocation ParentInstantiationLoc = InstantiationLoc.isMacroID() ? |
Chandler Carruth | 4027853 | 2011-07-25 16:49:02 +0000 | [diff] [blame] | 1688 | SM.getExpansionLoc(Loc) : |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1689 | SourceLocation(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1690 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1691 | // Walk the entire macro stack. |
| 1692 | while (!MacroStack.empty()) { |
| 1693 | if (InstantiationLoc == MacroStack.back().second) { |
| 1694 | MacroGroup = MacroStack.back().first; |
| 1695 | break; |
| 1696 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1697 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1698 | if (ParentInstantiationLoc == MacroStack.back().second) { |
| 1699 | MacroGroup = MacroStack.back().first; |
| 1700 | break; |
| 1701 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1702 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1703 | MacroStack.pop_back(); |
| 1704 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1705 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1706 | if (!MacroGroup || ParentInstantiationLoc == MacroStack.back().second) { |
| 1707 | // Create a new macro group and add it to the stack. |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 1708 | PathDiagnosticMacroPiece *NewGroup = |
| 1709 | new PathDiagnosticMacroPiece( |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 1710 | PathDiagnosticLocation::createSingleLocation((*I)->getLocation())); |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1711 | |
| 1712 | if (MacroGroup) |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 1713 | MacroGroup->subPieces.push_back(NewGroup); |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1714 | else { |
| 1715 | assert(InstantiationLoc.isFileID()); |
| 1716 | Pieces.push_back(NewGroup); |
| 1717 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1718 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1719 | MacroGroup = NewGroup; |
| 1720 | MacroStack.push_back(std::make_pair(MacroGroup, InstantiationLoc)); |
| 1721 | } |
| 1722 | |
| 1723 | // Finally, add the PathDiagnosticPiece to the group. |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 1724 | MacroGroup->subPieces.push_back(*I); |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1725 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1726 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1727 | // Now take the pieces and construct a new PathDiagnostic. |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1728 | PD.getMutablePieces().clear(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1729 | |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1730 | for (PiecesTy::iterator I=Pieces.begin(), E=Pieces.end(); I!=E; ++I) { |
Ted Kremenek | af84f8f | 2012-02-08 22:48:17 +0000 | [diff] [blame] | 1731 | if (PathDiagnosticMacroPiece *MP = dyn_cast<PathDiagnosticMacroPiece>(*I)) |
| 1732 | if (!MP->containsEvent()) |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1733 | continue; |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1734 | PD.getMutablePieces().push_back(*I); |
Ted Kremenek | 0e5c8d4 | 2009-03-10 05:16:17 +0000 | [diff] [blame] | 1735 | } |
| 1736 | } |
| 1737 | |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 1738 | void GRBugReporter::GeneratePathDiagnostic(PathDiagnostic& PD, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1739 | SmallVectorImpl<BugReport *> &bugReports) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1740 | |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1741 | assert(!bugReports.empty()); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1742 | SmallVector<const ExplodedNode *, 10> errorNodes; |
| 1743 | for (SmallVectorImpl<BugReport*>::iterator I = bugReports.begin(), |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1744 | E = bugReports.end(); I != E; ++I) { |
| 1745 | errorNodes.push_back((*I)->getErrorNode()); |
| 1746 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1747 | |
Ted Kremenek | a43a1eb | 2008-04-23 23:02:12 +0000 | [diff] [blame] | 1748 | // Construct a new graph that contains only a single path from the error |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1749 | // node to a root. |
Zhongxing Xu | 38b02b9 | 2009-08-06 06:28:40 +0000 | [diff] [blame] | 1750 | const std::pair<std::pair<ExplodedGraph*, NodeBackMap*>, |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1751 | std::pair<ExplodedNode*, unsigned> >& |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1752 | GPair = MakeReportGraph(&getGraph(), errorNodes); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1753 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1754 | // Find the BugReport with the original location. |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1755 | assert(GPair.second.second < bugReports.size()); |
| 1756 | BugReport *R = bugReports[GPair.second.second]; |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1757 | assert(R && "No original report found for sliced graph."); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1758 | |
Dylan Noblesmith | 6f42b62 | 2012-02-05 02:12:40 +0000 | [diff] [blame] | 1759 | OwningPtr<ExplodedGraph> ReportGraph(GPair.first.first); |
| 1760 | OwningPtr<NodeBackMap> BackMap(GPair.first.second); |
Zhongxing Xu | c5619d9 | 2009-08-06 01:32:16 +0000 | [diff] [blame] | 1761 | const ExplodedNode *N = GPair.second.first; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1762 | |
| 1763 | // Start building the path diagnostic... |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 1764 | PathDiagnosticBuilder PDB(*this, R, BackMap.get(), |
| 1765 | getPathDiagnosticConsumer()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1766 | |
Anna Zaks | 8e6431a | 2011-08-18 22:37:56 +0000 | [diff] [blame] | 1767 | // Register additional node visitors. |
Anna Zaks | 50bbc16 | 2011-08-19 22:33:38 +0000 | [diff] [blame] | 1768 | R->addVisitor(new NilReceiverBRVisitor()); |
| 1769 | R->addVisitor(new ConditionBRVisitor()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1770 | |
Anna Zaks | 23f395e | 2011-08-20 01:27:22 +0000 | [diff] [blame] | 1771 | // Generate the very last diagnostic piece - the piece is visible before |
| 1772 | // the trace is expanded. |
| 1773 | PathDiagnosticPiece *LastPiece = 0; |
| 1774 | for (BugReport::visitor_iterator I = R->visitor_begin(), |
| 1775 | E = R->visitor_end(); I!=E; ++I) { |
| 1776 | if (PathDiagnosticPiece *Piece = (*I)->getEndPath(PDB, N, *R)) { |
| 1777 | assert (!LastPiece && |
| 1778 | "There can only be one final piece in a diagnostic."); |
| 1779 | LastPiece = Piece; |
| 1780 | } |
| 1781 | } |
| 1782 | if (!LastPiece) |
| 1783 | LastPiece = BugReporterVisitor::getDefaultEndPath(PDB, N, *R); |
| 1784 | if (LastPiece) |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 1785 | PD.getActivePath().push_back(LastPiece); |
Anna Zaks | 23f395e | 2011-08-20 01:27:22 +0000 | [diff] [blame] | 1786 | else |
| 1787 | return; |
| 1788 | |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 1789 | switch (PDB.getGenerationScheme()) { |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 1790 | case PathDiagnosticConsumer::Extensive: |
Ted Kremenek | 8966bc1 | 2009-05-06 21:39:49 +0000 | [diff] [blame] | 1791 | GenerateExtensivePathDiagnostic(PD, PDB, N); |
Ted Kremenek | 5fb5dfb | 2009-04-01 06:13:56 +0000 | [diff] [blame] | 1792 | break; |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 1793 | case PathDiagnosticConsumer::Minimal: |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 1794 | GenerateMinimalPathDiagnostic(PD, PDB, N); |
| 1795 | break; |
| 1796 | } |
Ted Kremenek | c89f4b0 | 2012-02-28 23:06:21 +0000 | [diff] [blame] | 1797 | |
| 1798 | // Finally, prune the diagnostic path of uninteresting stuff. |
| 1799 | bool hasSomethingInteresting = RemoveUneededCalls(PD.getMutablePieces()); |
| 1800 | assert(hasSomethingInteresting); |
| 1801 | (void) hasSomethingInteresting; |
Ted Kremenek | 7dc8664 | 2009-03-31 20:22:36 +0000 | [diff] [blame] | 1802 | } |
| 1803 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1804 | void BugReporter::Register(BugType *BT) { |
Ted Kremenek | 3baf672 | 2010-11-24 00:54:37 +0000 | [diff] [blame] | 1805 | BugTypes = F.add(BugTypes, BT); |
Ted Kremenek | 76d90c8 | 2008-05-16 18:33:14 +0000 | [diff] [blame] | 1806 | } |
| 1807 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1808 | void BugReporter::EmitReport(BugReport* R) { |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1809 | // Compute the bug report's hash to determine its equivalence class. |
| 1810 | llvm::FoldingSetNodeID ID; |
| 1811 | R->Profile(ID); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1812 | |
| 1813 | // Lookup the equivance class. If there isn't one, create it. |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1814 | BugType& BT = R->getBugType(); |
| 1815 | Register(&BT); |
| 1816 | void *InsertPos; |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1817 | BugReportEquivClass* EQ = EQClasses.FindNodeOrInsertPos(ID, InsertPos); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1818 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1819 | if (!EQ) { |
| 1820 | EQ = new BugReportEquivClass(R); |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 1821 | EQClasses.InsertNode(EQ, InsertPos); |
Anna Zaks | 3b030a2 | 2011-08-19 01:57:09 +0000 | [diff] [blame] | 1822 | EQClassesVector.push_back(EQ); |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1823 | } |
| 1824 | else |
| 1825 | EQ->AddReport(R); |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 1826 | } |
| 1827 | |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1828 | |
| 1829 | //===----------------------------------------------------------------------===// |
| 1830 | // Emitting reports in equivalence classes. |
| 1831 | //===----------------------------------------------------------------------===// |
| 1832 | |
| 1833 | namespace { |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 1834 | struct FRIEC_WLItem { |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1835 | const ExplodedNode *N; |
| 1836 | ExplodedNode::const_succ_iterator I, E; |
| 1837 | |
| 1838 | FRIEC_WLItem(const ExplodedNode *n) |
| 1839 | : N(n), I(N->succ_begin()), E(N->succ_end()) {} |
| 1840 | }; |
| 1841 | } |
| 1842 | |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1843 | static BugReport * |
| 1844 | FindReportInEquivalenceClass(BugReportEquivClass& EQ, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1845 | SmallVectorImpl<BugReport*> &bugReports) { |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1846 | |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1847 | BugReportEquivClass::iterator I = EQ.begin(), E = EQ.end(); |
| 1848 | assert(I != E); |
| 1849 | BugReport *R = *I; |
| 1850 | BugType& BT = R->getBugType(); |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1851 | |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1852 | // If we don't need to suppress any of the nodes because they are |
| 1853 | // post-dominated by a sink, simply add all the nodes in the equivalence class |
| 1854 | // to 'Nodes'. Any of the reports will serve as a "representative" report. |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1855 | if (!BT.isSuppressOnSink()) { |
| 1856 | for (BugReportEquivClass::iterator I=EQ.begin(), E=EQ.end(); I!=E; ++I) { |
Ted Kremenek | 9c378f7 | 2011-08-12 23:37:29 +0000 | [diff] [blame] | 1857 | const ExplodedNode *N = I->getErrorNode(); |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1858 | if (N) { |
| 1859 | R = *I; |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1860 | bugReports.push_back(R); |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1861 | } |
| 1862 | } |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1863 | return R; |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1864 | } |
| 1865 | |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1866 | // For bug reports that should be suppressed when all paths are post-dominated |
| 1867 | // by a sink node, iterate through the reports in the equivalence class |
| 1868 | // until we find one that isn't post-dominated (if one exists). We use a |
| 1869 | // DFS traversal of the ExplodedGraph to find a non-sink node. We could write |
| 1870 | // this as a recursive function, but we don't want to risk blowing out the |
| 1871 | // stack for very long paths. |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1872 | BugReport *exampleReport = 0; |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1873 | |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1874 | for (; I != E; ++I) { |
| 1875 | R = *I; |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1876 | const ExplodedNode *errorNode = R->getErrorNode(); |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1877 | |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1878 | if (!errorNode) |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1879 | continue; |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1880 | if (errorNode->isSink()) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1881 | llvm_unreachable( |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1882 | "BugType::isSuppressSink() should not be 'true' for sink end nodes"); |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1883 | } |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1884 | // No successors? By definition this nodes isn't post-dominated by a sink. |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1885 | if (errorNode->succ_empty()) { |
| 1886 | bugReports.push_back(R); |
| 1887 | if (!exampleReport) |
| 1888 | exampleReport = R; |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1889 | continue; |
| 1890 | } |
| 1891 | |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1892 | // At this point we know that 'N' is not a sink and it has at least one |
| 1893 | // successor. Use a DFS worklist to find a non-sink end-of-path node. |
| 1894 | typedef FRIEC_WLItem WLItem; |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1895 | typedef SmallVector<WLItem, 10> DFSWorkList; |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1896 | llvm::DenseMap<const ExplodedNode *, unsigned> Visited; |
| 1897 | |
| 1898 | DFSWorkList WL; |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1899 | WL.push_back(errorNode); |
| 1900 | Visited[errorNode] = 1; |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1901 | |
| 1902 | while (!WL.empty()) { |
| 1903 | WLItem &WI = WL.back(); |
| 1904 | assert(!WI.N->succ_empty()); |
| 1905 | |
| 1906 | for (; WI.I != WI.E; ++WI.I) { |
| 1907 | const ExplodedNode *Succ = *WI.I; |
| 1908 | // End-of-path node? |
| 1909 | if (Succ->succ_empty()) { |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1910 | // If we found an end-of-path node that is not a sink. |
| 1911 | if (!Succ->isSink()) { |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1912 | bugReports.push_back(R); |
| 1913 | if (!exampleReport) |
| 1914 | exampleReport = R; |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1915 | WL.clear(); |
| 1916 | break; |
| 1917 | } |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1918 | // Found a sink? Continue on to the next successor. |
| 1919 | continue; |
| 1920 | } |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1921 | // Mark the successor as visited. If it hasn't been explored, |
| 1922 | // enqueue it to the DFS worklist. |
| 1923 | unsigned &mark = Visited[Succ]; |
| 1924 | if (!mark) { |
| 1925 | mark = 1; |
| 1926 | WL.push_back(Succ); |
| 1927 | break; |
| 1928 | } |
| 1929 | } |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1930 | |
| 1931 | // The worklist may have been cleared at this point. First |
| 1932 | // check if it is empty before checking the last item. |
| 1933 | if (!WL.empty() && &WL.back() == &WI) |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1934 | WL.pop_back(); |
| 1935 | } |
| 1936 | } |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1937 | |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1938 | // ExampleReport will be NULL if all the nodes in the equivalence class |
| 1939 | // were post-dominated by sinks. |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1940 | return exampleReport; |
Ted Kremenek | 61f52bd | 2010-09-09 19:05:34 +0000 | [diff] [blame] | 1941 | } |
Ted Kremenek | e0a5807 | 2009-09-18 22:37:37 +0000 | [diff] [blame] | 1942 | |
| 1943 | //===----------------------------------------------------------------------===// |
| 1944 | // DiagnosticCache. This is a hack to cache analyzer diagnostics. It |
| 1945 | // uses global state, which eventually should go elsewhere. |
| 1946 | //===----------------------------------------------------------------------===// |
| 1947 | namespace { |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 1948 | class DiagCacheItem : public llvm::FoldingSetNode { |
Ted Kremenek | e0a5807 | 2009-09-18 22:37:37 +0000 | [diff] [blame] | 1949 | llvm::FoldingSetNodeID ID; |
| 1950 | public: |
| 1951 | DiagCacheItem(BugReport *R, PathDiagnostic *PD) { |
Anna Zaks | 4522e2a | 2011-09-19 23:44:31 +0000 | [diff] [blame] | 1952 | R->Profile(ID); |
| 1953 | PD->Profile(ID); |
Ted Kremenek | e0a5807 | 2009-09-18 22:37:37 +0000 | [diff] [blame] | 1954 | } |
| 1955 | |
| 1956 | void Profile(llvm::FoldingSetNodeID &id) { |
| 1957 | id = ID; |
| 1958 | } |
| 1959 | |
| 1960 | llvm::FoldingSetNodeID &getID() { return ID; } |
| 1961 | }; |
| 1962 | } |
| 1963 | |
| 1964 | static bool IsCachedDiagnostic(BugReport *R, PathDiagnostic *PD) { |
| 1965 | // FIXME: Eventually this diagnostic cache should reside in something |
| 1966 | // like AnalysisManager instead of being a static variable. This is |
| 1967 | // really unsafe in the long term. |
| 1968 | typedef llvm::FoldingSet<DiagCacheItem> DiagnosticCache; |
| 1969 | static DiagnosticCache DC; |
| 1970 | |
| 1971 | void *InsertPos; |
| 1972 | DiagCacheItem *Item = new DiagCacheItem(R, PD); |
| 1973 | |
| 1974 | if (DC.FindNodeOrInsertPos(Item->getID(), InsertPos)) { |
| 1975 | delete Item; |
| 1976 | return true; |
| 1977 | } |
| 1978 | |
| 1979 | DC.InsertNode(Item, InsertPos); |
| 1980 | return false; |
| 1981 | } |
| 1982 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1983 | void BugReporter::FlushReport(BugReportEquivClass& EQ) { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1984 | SmallVector<BugReport*, 10> bugReports; |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1985 | BugReport *exampleReport = FindReportInEquivalenceClass(EQ, bugReports); |
| 1986 | if (!exampleReport) |
Ted Kremenek | 06c9cb4 | 2009-09-14 22:01:32 +0000 | [diff] [blame] | 1987 | return; |
| 1988 | |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 1989 | PathDiagnosticConsumer* PD = getPathDiagnosticConsumer(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1990 | |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 1991 | // FIXME: Make sure we use the 'R' for the path that was actually used. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1992 | // Probably doesn't make a difference in practice. |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1993 | BugType& BT = exampleReport->getBugType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1994 | |
Dylan Noblesmith | 6f42b62 | 2012-02-05 02:12:40 +0000 | [diff] [blame] | 1995 | OwningPtr<PathDiagnostic> |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1996 | D(new PathDiagnostic(exampleReport->getBugType().getName(), |
Ted Kremenek | da0e842 | 2009-04-29 22:05:03 +0000 | [diff] [blame] | 1997 | !PD || PD->useVerboseDescription() |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 1998 | ? exampleReport->getDescription() |
| 1999 | : exampleReport->getShortDescription(), |
Ted Kremenek | d49967f | 2009-04-29 21:58:13 +0000 | [diff] [blame] | 2000 | BT.getCategory())); |
| 2001 | |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 2002 | if (!bugReports.empty()) |
| 2003 | GeneratePathDiagnostic(*D.get(), bugReports); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2004 | |
Ted Kremenek | 40406fe | 2010-12-03 06:52:30 +0000 | [diff] [blame] | 2005 | if (IsCachedDiagnostic(exampleReport, D.get())) |
Ted Kremenek | e0a5807 | 2009-09-18 22:37:37 +0000 | [diff] [blame] | 2006 | return; |
| 2007 | |
Ted Kremenek | 072192b | 2008-04-30 23:47:44 +0000 | [diff] [blame] | 2008 | // Get the meta data. |
Anna Zaks | 7f2531c | 2011-08-22 20:31:28 +0000 | [diff] [blame] | 2009 | const BugReport::ExtraTextList &Meta = |
| 2010 | exampleReport->getExtraText(); |
| 2011 | for (BugReport::ExtraTextList::const_iterator i = Meta.begin(), |
| 2012 | e = Meta.end(); i != e; ++i) { |
| 2013 | D->addMeta(*i); |
| 2014 | } |
Ted Kremenek | 75840e1 | 2008-04-18 01:56:37 +0000 | [diff] [blame] | 2015 | |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 2016 | // Emit a summary diagnostic to the regular Diagnostics engine. |
Argyrios Kyrtzidis | 640ccf0 | 2010-12-04 01:12:15 +0000 | [diff] [blame] | 2017 | BugReport::ranges_iterator Beg, End; |
| 2018 | llvm::tie(Beg, End) = exampleReport->getRanges(); |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 2019 | DiagnosticsEngine &Diag = getDiagnostic(); |
Ted Kremenek | c213b48 | 2010-01-15 07:56:51 +0000 | [diff] [blame] | 2020 | |
| 2021 | // Search the description for '%', as that will be interpretted as a |
| 2022 | // format character by FormatDiagnostics. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2023 | StringRef desc = exampleReport->getShortDescription(); |
Ted Kremenek | c213b48 | 2010-01-15 07:56:51 +0000 | [diff] [blame] | 2024 | unsigned ErrorDiag; |
| 2025 | { |
Dylan Noblesmith | f7ccbad | 2012-02-05 02:13:05 +0000 | [diff] [blame] | 2026 | SmallString<512> TmpStr; |
Ted Kremenek | c213b48 | 2010-01-15 07:56:51 +0000 | [diff] [blame] | 2027 | llvm::raw_svector_ostream Out(TmpStr); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2028 | for (StringRef::iterator I=desc.begin(), E=desc.end(); I!=E; ++I) |
Ted Kremenek | c213b48 | 2010-01-15 07:56:51 +0000 | [diff] [blame] | 2029 | if (*I == '%') |
| 2030 | Out << "%%"; |
| 2031 | else |
| 2032 | Out << *I; |
| 2033 | |
| 2034 | Out.flush(); |
David Blaikie | d6471f7 | 2011-09-25 23:23:43 +0000 | [diff] [blame] | 2035 | ErrorDiag = Diag.getCustomDiagID(DiagnosticsEngine::Warning, TmpStr); |
Ted Kremenek | c213b48 | 2010-01-15 07:56:51 +0000 | [diff] [blame] | 2036 | } |
Ted Kremenek | 5720207 | 2008-07-14 17:40:50 +0000 | [diff] [blame] | 2037 | |
Argyrios Kyrtzidis | b6b7e7b | 2010-12-03 00:58:10 +0000 | [diff] [blame] | 2038 | { |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 2039 | DiagnosticBuilder diagBuilder = Diag.Report( |
| 2040 | exampleReport->getLocation(getSourceManager()).asLocation(), ErrorDiag); |
Argyrios Kyrtzidis | 640ccf0 | 2010-12-04 01:12:15 +0000 | [diff] [blame] | 2041 | for (BugReport::ranges_iterator I = Beg; I != End; ++I) |
Argyrios Kyrtzidis | b6b7e7b | 2010-12-03 00:58:10 +0000 | [diff] [blame] | 2042 | diagBuilder << *I; |
Ted Kremenek | 2f0e89e | 2008-04-18 22:56:53 +0000 | [diff] [blame] | 2043 | } |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 2044 | |
David Blaikie | ef3643f | 2011-09-26 00:51:36 +0000 | [diff] [blame] | 2045 | // Emit a full diagnostic for the path if we have a PathDiagnosticConsumer. |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 2046 | if (!PD) |
| 2047 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2048 | |
Ted Kremenek | 802e024 | 2012-02-08 04:32:34 +0000 | [diff] [blame] | 2049 | if (D->path.empty()) { |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 2050 | PathDiagnosticPiece *piece = new PathDiagnosticEventPiece( |
| 2051 | exampleReport->getLocation(getSourceManager()), |
| 2052 | exampleReport->getDescription()); |
Ted Kremenek | 1fbfd5b | 2009-03-06 23:58:11 +0000 | [diff] [blame] | 2053 | |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 2054 | for ( ; Beg != End; ++Beg) piece->addRange(*Beg); |
Ted Kremenek | 2042fc1 | 2012-02-24 06:00:00 +0000 | [diff] [blame] | 2055 | D->getActivePath().push_back(piece); |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 2056 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2057 | |
Ted Kremenek | 3148eb4 | 2009-01-24 00:55:43 +0000 | [diff] [blame] | 2058 | PD->HandlePathDiagnostic(D.take()); |
Ted Kremenek | 61f3e05 | 2008-04-03 04:42:52 +0000 | [diff] [blame] | 2059 | } |
Ted Kremenek | 5720207 | 2008-07-14 17:40:50 +0000 | [diff] [blame] | 2060 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2061 | void BugReporter::EmitBasicReport(StringRef name, StringRef str, |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 2062 | PathDiagnosticLocation Loc, |
Ted Kremenek | 8c036c7 | 2008-09-20 04:23:38 +0000 | [diff] [blame] | 2063 | SourceRange* RBeg, unsigned NumRanges) { |
| 2064 | EmitBasicReport(name, "", str, Loc, RBeg, NumRanges); |
| 2065 | } |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 2066 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2067 | void BugReporter::EmitBasicReport(StringRef name, |
| 2068 | StringRef category, |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 2069 | StringRef str, PathDiagnosticLocation Loc, |
Ted Kremenek | 8c036c7 | 2008-09-20 04:23:38 +0000 | [diff] [blame] | 2070 | SourceRange* RBeg, unsigned NumRanges) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2071 | |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 2072 | // 'BT' is owned by BugReporter. |
| 2073 | BugType *BT = getBugTypeForName(name, category); |
Anna Zaks | 590dd8e | 2011-09-20 21:38:35 +0000 | [diff] [blame] | 2074 | BugReport *R = new BugReport(*BT, str, Loc); |
Ted Kremenek | cf118d4 | 2009-02-04 23:49:09 +0000 | [diff] [blame] | 2075 | for ( ; NumRanges > 0 ; --NumRanges, ++RBeg) R->addRange(*RBeg); |
| 2076 | EmitReport(R); |
Ted Kremenek | 5720207 | 2008-07-14 17:40:50 +0000 | [diff] [blame] | 2077 | } |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 2078 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2079 | BugType *BugReporter::getBugTypeForName(StringRef name, |
| 2080 | StringRef category) { |
Dylan Noblesmith | f7ccbad | 2012-02-05 02:13:05 +0000 | [diff] [blame] | 2081 | SmallString<136> fullDesc; |
Argyrios Kyrtzidis | 404fc3a | 2011-02-23 00:16:01 +0000 | [diff] [blame] | 2082 | llvm::raw_svector_ostream(fullDesc) << name << ":" << category; |
| 2083 | llvm::StringMapEntry<BugType *> & |
| 2084 | entry = StrBugTypes.GetOrCreateValue(fullDesc); |
| 2085 | BugType *BT = entry.getValue(); |
| 2086 | if (!BT) { |
| 2087 | BT = new BugType(name, category); |
| 2088 | entry.setValue(BT); |
| 2089 | } |
| 2090 | return BT; |
| 2091 | } |