ExprEngine.cpp revision 08291a937a149dbd036fd6ac8ab061eb8034343d
1d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis//=-- ExprEngine.cpp - Path-Sensitive Expression-Level Dataflow ---*- C++ -*-= 264924859b6b09d1cfb62fecf5954ec6c27cb58feTed Kremenek// 34af84313df0d2710fd57af89132e680294225cadTed Kremenek// The LLVM Compiler Infrastructure 4d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 5d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// This file is distributed under the University of Illinois Open Source 6d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// License. See LICENSE.TXT for details. 7d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 8d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek//===----------------------------------------------------------------------===// 9d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 1077349cb20bfd7069d081f84c91975bfa8ef60a32Ted Kremenek// This file defines a meta-engine for path-sensitive dataflow analysis that 1177349cb20bfd7069d081f84c91975bfa8ef60a32Ted Kremenek// is built on GREngine, but provides the boilerplate to execute transfer 1277349cb20bfd7069d081f84c91975bfa8ef60a32Ted Kremenek// functions and build the ExplodedGraph at the expression level. 13d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek// 14d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek//===----------------------------------------------------------------------===// 15a7af5ea88a6c5bdf87497cca6c20831e8c546751Argyrios Kyrtzidis 16c2994283aa7538b7420c8e398cde7afa328d7042Anna Zaks#define DEBUG_TYPE "ExprEngine" 17c2994283aa7538b7420c8e398cde7afa328d7042Anna Zaks 189b663716449b618ba0390b1dbebc54fa8e971124Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 19199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck#include "clang/AST/CharUnits.h" 2016f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/ParentMap.h" 21337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek#include "clang/AST/StmtCXX.h" 2255fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/AST/StmtObjC.h" 231b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 240bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek#include "clang/Basic/PrettyStackTrace.h" 2555fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Basic/SourceManager.h" 2655fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" 2755fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/StaticAnalyzer/Core/CheckerManager.h" 2855fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h" 2955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" 306cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/ADT/ImmutableList.h" 31c2994283aa7538b7420c8e398cde7afa328d7042Anna Zaks#include "llvm/ADT/Statistic.h" 3255fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "llvm/Support/raw_ostream.h" 334323a57627e796dcfdfdb7d47672dc09ed308edaTed Kremenek 340f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek#ifndef NDEBUG 350f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek#include "llvm/Support/GraphWriter.h" 360f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek#endif 370f5f0595d6a038843a7051c5a65fca7bce2915a0Ted Kremenek 38b387a3f23e423d62c053be86294b703da1d1a222Ted Kremenekusing namespace clang; 399ef6537a894c33003359b1f9b9676e9178e028b7Ted Kremenekusing namespace ento; 40b387a3f23e423d62c053be86294b703da1d1a222Ted Kremenekusing llvm::APSInt; 41ab2b8c54bca82866876f91e756788916d3fa20c3Ted Kremenek 42c2994283aa7538b7420c8e398cde7afa328d7042Anna ZaksSTATISTIC(NumRemoveDeadBindings, 43c2994283aa7538b7420c8e398cde7afa328d7042Anna Zaks "The # of times RemoveDeadBindings is called"); 44749bbe6f5f23676244f12a0d41511c8e73516febAnna ZaksSTATISTIC(NumMaxBlockCountReached, 45749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks "The # of aborted paths due to reaching the maximum block count in " 46749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks "a top level function"); 47749bbe6f5f23676244f12a0d41511c8e73516febAnna ZaksSTATISTIC(NumMaxBlockCountReachedInInlined, 48749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks "The # of aborted paths due to reaching the maximum block count in " 49749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks "an inlined function"); 505903a373db3d27794c90b25687e0dd6adb0e497dAnna ZaksSTATISTIC(NumTimesRetriedWithoutInlining, 515903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks "The # of times we re-evaluated a call without inlining"); 525903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 53e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 54bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek// Engine construction and deletion. 55bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek//===----------------------------------------------------------------------===// 56bdb435ddaafd5069becd543d638112f68825b89dTed Kremenek 573fd5f370a28552976c52e76c3035d79012d78ddaAnna ZaksExprEngine::ExprEngine(AnalysisManager &mgr, bool gcEnabled, 58fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks SetOfConstDecls *VisitedCalleesIn, 5975f31c4862643ab09479c979fabf754e7ffe1460Anna Zaks FunctionSummariesTy *FS, 6075f31c4862643ab09479c979fabf754e7ffe1460Anna Zaks InliningModes HowToInlineIn) 6125e695b2d574d919cc1bbddf3a2efe073d449b1cZhongxing Xu : AMgr(mgr), 621d26f48dc2eea1c07431ca1519d7034a21b9bcffTed Kremenek AnalysisDeclContexts(mgr.getAnalysisDeclContextManager()), 63fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks Engine(*this, FS), 64d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis G(Engine.getGraph()), 65c77a55126fcad66fb086f8e100a494caa2496a2dZhongxing Xu StateMgr(getContext(), mgr.getStoreManagerCreator(), 6632a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek mgr.getConstraintManagerCreator(), G.getAllocator(), 67ca5d78d0bc3010164f2f9682967d64d7e305a167Jordan Rose this), 6850a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek SymMgr(StateMgr.getSymbolManager()), 69c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder(StateMgr.getSValBuilder()), 709428723d6730f4fd257e15b78d24991ae95bbd84Jordan Rose currStmtIdx(0), currBldrCtx(0), 714ef19205b6912316296db74a9073ad6fa60e4ccaTed Kremenek ObjCNoRet(mgr.getASTContext()), 72fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks ObjCGCEnabled(gcEnabled), BR(mgr, *this), 7375f31c4862643ab09479c979fabf754e7ffe1460Anna Zaks VisitedCallees(VisitedCalleesIn), 7475f31c4862643ab09479c979fabf754e7ffe1460Anna Zaks HowToInline(HowToInlineIn) 75255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek{ 764d9e497a2b1eab3b1214848216050c64fc3acfd6Jordan Rose unsigned TrimInterval = mgr.options.getGraphTrimInterval(); 774d9e497a2b1eab3b1214848216050c64fc3acfd6Jordan Rose if (TrimInterval != 0) { 784d9e497a2b1eab3b1214848216050c64fc3acfd6Jordan Rose // Enable eager node reclaimation when constructing the ExplodedGraph. 794d9e497a2b1eab3b1214848216050c64fc3acfd6Jordan Rose G.enableNodeReclamation(TrimInterval); 804d9e497a2b1eab3b1214848216050c64fc3acfd6Jordan Rose } 81c80135ba857da48173578b9c528fce6777e18168Ted Kremenek} 8250a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek 83d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios KyrtzidisExprEngine::~ExprEngine() { 84cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek BR.FlushReports(); 8550a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek} 8650a6d0ce344c02782e0207574005c3b2aaa5077cTed Kremenek 87e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 88e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Utility methods. 89e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 90e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 918bef8238181a30e52dea380789a7e2d760eac532Ted KremenekProgramStateRef ExprEngine::getInitialState(const LocationContext *InitLoc) { 928bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = StateMgr.getInitialState(InitLoc); 93a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek const Decl *D = InitLoc->getDecl(); 941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 95cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek // Preconditions. 9652e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek // FIXME: It would be nice if we had a more general mechanism to add 9752e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek // such preconditions. Some day. 985974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek do { 99a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek 1005974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 1015974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // Precondition: the first argument of 'main' is an integer guaranteed 1025974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek // to be > 0. 1035974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const IdentifierInfo *II = FD->getIdentifier(); 1045974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!II || !(II->getName() == "main" && FD->getNumParams() > 0)) 1055974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 1065974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 1075974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const ParmVarDecl *PD = FD->getParamDecl(0); 1085974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek QualType T = PD->getType(); 1095974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!T->isIntegerType()) 1105974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 111b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1125974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek const MemRegion *R = state->getRegion(PD, InitLoc); 1135974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!R) 1145974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 115b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1161397663af9dbcc24dbf0e11de43931b3dc08fdbbTed Kremenek SVal V = state->getSVal(loc::MemRegionVal(R)); 1179c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek SVal Constraint_untested = evalBinOp(state, BO_GT, V, 118c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek svalBuilder.makeZeroVal(T), 1195974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek getContext().IntTy); 1205974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 121dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie Optional<DefinedOrUnknownSVal> Constraint = 122dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie Constraint_untested.getAs<DefinedOrUnknownSVal>(); 123b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1245974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek if (!Constraint) 1255974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek break; 126b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1278bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek if (ProgramStateRef newState = state->assume(*Constraint, true)) 1285974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek state = newState; 12952e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek } 130a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek break; 131a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek } 132a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek while (0); 133a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek 134a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { 135a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek // Precondition: 'self' is always non-null upon entry to an Objective-C 136a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek // method. 137a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek const ImplicitParamDecl *SelfD = MD->getSelfDecl(); 138a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek const MemRegion *R = state->getRegion(SelfD, InitLoc); 139a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek SVal V = state->getSVal(loc::MemRegionVal(R)); 140a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek 141dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<Loc> LV = V.getAs<Loc>()) { 142a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek // Assume that the pointer value in 'self' is non-null. 143a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek state = state->assume(*LV, true); 144a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek assert(state && "'self' cannot be null"); 145a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek } 146a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek } 1475974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek 148a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { 149a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek if (!MD->isStatic()) { 150a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek // Precondition: 'this' is always non-null upon entry to the 151a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek // top-level function. This is our starting assumption for 152a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek // analyzing an "open" program. 153a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek const StackFrameContext *SFC = InitLoc->getCurrentStackFrame(); 154a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek if (SFC->getParent() == 0) { 15510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek loc::MemRegionVal L = svalBuilder.getCXXThis(MD, SFC); 156a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek SVal V = state->getSVal(L); 157dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<Loc> LV = V.getAs<Loc>()) { 158a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek state = state->assume(*LV, true); 159a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek assert(state && "'this' cannot be null"); 160a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek } 1615974ec518289a719fdd18122060bbcfe49d439e3Ted Kremenek } 162cfcd7fd0de701c5ce05e96de1ed2d0bf8c7035d9Ted Kremenek } 163a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek } 164a078ecf3484d62b01d9f8c01e0fecffd65c583e1Ted Kremenek 16552e5602056e4cade24cbcca57767e94e1d430b03Ted Kremenek return state; 166e070a1df66aab6d4168fb28f7559fdf996df3567Ted Kremenek} 167e070a1df66aab6d4168fb28f7559fdf996df3567Ted Kremenek 1685e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan RoseProgramStateRef 1695e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan RoseExprEngine::createTemporaryRegionIfNeeded(ProgramStateRef State, 1705e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose const LocationContext *LC, 1715e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose const Expr *Ex, 1725e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose const Expr *Result) { 17387193dac8f2c6c8f7ee1aa9eeb64622ec75c881bJordan Rose SVal V = State->getSVal(Ex, LC); 17408291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose if (!Result) { 17508291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose // If we don't have an explicit result expression, we're in "if needed" 17608291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose // mode. Only create a region if the current value is a NonLoc. 17708291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose if (!V.getAs<NonLoc>()) 17808291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose return State; 17908291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose Result = Ex; 18008291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose } else { 18108291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose // We need to create a region no matter what. For sanity, make sure we don't 18208291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose // try to stuff a Loc into a non-pointer temporary region. 18308291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose assert(!V.getAs<Loc>() || Loc::isLocType(Result->getType())); 18408291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose } 1855e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose 1865e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose ProgramStateManager &StateMgr = State->getStateManager(); 1875e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose MemRegionManager &MRMgr = StateMgr.getRegionManager(); 1885e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose StoreManager &StoreMgr = StateMgr.getStoreManager(); 1895e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose 1905e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose // We need to be careful about treating a derived type's value as 19108291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose // bindings for a base type. Unless we're creating a temporary pointer region, 19208291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose // start by stripping and recording base casts. 1935e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose SmallVector<const CastExpr *, 4> Casts; 1945e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose const Expr *Inner = Ex->IgnoreParens(); 19508291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose if (!Loc::isLocType(Result->getType())) { 196eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose while (const CastExpr *CE = dyn_cast<CastExpr>(Inner)) { 197eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose if (CE->getCastKind() == CK_DerivedToBase || 198eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose CE->getCastKind() == CK_UncheckedDerivedToBase) 199eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose Casts.push_back(CE); 200eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose else if (CE->getCastKind() != CK_NoOp) 201eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose break; 2025e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose 203eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose Inner = CE->getSubExpr()->IgnoreParens(); 204eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose } 2055e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose } 206f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose 2075e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose // Create a temporary object region for the inner expression (which may have 20808291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose // a more derived type) and bind the value into it. 20908291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose const TypedValueRegion *TR = MRMgr.getCXXTempObjectRegion(Inner, LC); 21008291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose SVal Reg = loc::MemRegionVal(TR); 21108291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose 21208291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose if (V.isUnknown()) 21308291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose V = getSValBuilder().conjureSymbolVal(Result, LC, TR->getValueType(), 21408291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose currBldrCtx->blockCount()); 2155e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose State = State->bindLoc(Reg, V); 2169f1d541ef1aca8f953e5bb4e7177969f0a2062d5Jordan Rose 2175e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose // Re-apply the casts (from innermost to outermost) for type sanity. 2185e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose for (SmallVectorImpl<const CastExpr *>::reverse_iterator I = Casts.rbegin(), 2195e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose E = Casts.rend(); 2205e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose I != E; ++I) { 2215e5440ba9c135f523f72e7e7c5da59d390d697c5Jordan Rose Reg = StoreMgr.evalDerivedToBase(Reg, *I); 222f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose } 223f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose 22408291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose State = State->BindExpr(Result, LC, Reg); 225f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose return State; 226f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose} 227f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose 228e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 229e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Top-level transfer function logic (Dispatcher). 230e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 231e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 2329c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalAssume - Called by ConstraintManager. Used to call checker-specific 23332a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek/// logic for handling assumptions on symbolic values. 2348bef8238181a30e52dea380789a7e2d760eac532Ted KremenekProgramStateRef ExprEngine::processAssume(ProgramStateRef state, 235fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose SVal cond, bool assumption) { 236fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose return getCheckerManager().runCheckersForEvalAssume(state, cond, assumption); 23732a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek} 23832a58084a4c53e6938dd81bfce224db25a5976d1Ted Kremenek 2398bef8238181a30e52dea380789a7e2d760eac532Ted Kremenekbool ExprEngine::wantsRegionChangeUpdate(ProgramStateRef state) { 240183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis return getCheckerManager().wantsRegionChangeUpdate(state); 241c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 242c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 2438bef8238181a30e52dea380789a7e2d760eac532Ted KremenekProgramStateRef 2448bef8238181a30e52dea380789a7e2d760eac532Ted KremenekExprEngine::processRegionChanges(ProgramStateRef state, 245bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks const InvalidatedSymbols *invalidated, 246537716ad8dd10f984b6cfe6985afade1185c5e3cJordy Rose ArrayRef<const MemRegion *> Explicits, 24766c40400e7d6272b0cd675ada18dd62c1f0362c7Anna Zaks ArrayRef<const MemRegion *> Regions, 248740d490593e0de8732a697c9f77b90ddd463863bJordan Rose const CallEvent *Call) { 24935bdbf40624beba3fc00cb72ab444659939c1a6bTed Kremenek return getCheckerManager().runCheckersForRegionChanges(state, invalidated, 25066c40400e7d6272b0cd675ada18dd62c1f0362c7Anna Zaks Explicits, Regions, Call); 251c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose} 252c2b7dfaad674587cfd220ff447b3710d252130c3Jordy Rose 2538bef8238181a30e52dea380789a7e2d760eac532Ted Kremenekvoid ExprEngine::printState(raw_ostream &Out, ProgramStateRef State, 254dbd658e139b3e0bf084f75feaea8d844af9e319fJordy Rose const char *NL, const char *Sep) { 255dbd658e139b3e0bf084f75feaea8d844af9e319fJordy Rose getCheckerManager().runCheckersForPrintState(Out, State, NL, Sep); 256dbd658e139b3e0bf084f75feaea8d844af9e319fJordy Rose} 257dbd658e139b3e0bf084f75feaea8d844af9e319fJordy Rose 258e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processEndWorklist(bool hasWorkRemaining) { 25930726c6baee1417307236e854f1474fdb3cedb98Argyrios Kyrtzidis getCheckerManager().runCheckersForEndAnalysis(G, BR, *this); 260ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek} 261ccc263b44c62ce3a02f797a3ddb3d6017cf0e5e4Ted Kremenek 262ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaksvoid ExprEngine::processCFGElement(const CFGElement E, ExplodedNode *Pred, 263ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks unsigned StmtIdx, NodeBuilderContext *Ctx) { 26466c486f275531df6362b3511fc3af6563561801bTed Kremenek currStmtIdx = StmtIdx; 26566c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = Ctx; 266ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 2679c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu switch (E.getKind()) { 2683c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Statement: 269fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie ProcessStmt(const_cast<Stmt*>(E.castAs<CFGStmt>().getStmt()), Pred); 2703c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2713c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::Initializer: 272fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie ProcessInitializer(E.castAs<CFGInitializer>().getInitializer(), Pred); 2733c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2743c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::AutomaticObjectDtor: 2753c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::BaseDtor: 2763c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::MemberDtor: 2773c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek case CFGElement::TemporaryDtor: 278fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie ProcessImplicitDtor(E.castAs<CFGImplicitDtor>(), Pred); 2793c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return; 2809c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu } 28166c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = 0; 2829c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 2839c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 284ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenekstatic bool shouldRemoveDeadBindings(AnalysisManager &AMgr, 285ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek const CFGStmt S, 286ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek const ExplodedNode *Pred, 287ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek const LocationContext *LC) { 288ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek 289ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek // Are we never purging state values? 290255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if (AMgr.options.AnalysisPurgeOpt == PurgeNone) 291ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek return false; 292ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek 293ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek // Is this the beginning of a basic block? 2947a95de68c093991047ed8d339479ccad51b88663David Blaikie if (Pred->getLocation().getAs<BlockEntrance>()) 295ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek return true; 296ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek 297ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek // Is this on a non-expression? 298ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek if (!isa<Expr>(S.getStmt())) 299ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek return true; 300ff80afcfb2b00ccffcb6cb10528bec565fc59eddAnna Zaks 301ff80afcfb2b00ccffcb6cb10528bec565fc59eddAnna Zaks // Run before processing a call. 3026062334cc388bce69fb3978c4ecb26c6485a5c2bJordan Rose if (CallEvent::isCallStmt(S.getStmt())) 303ff80afcfb2b00ccffcb6cb10528bec565fc59eddAnna Zaks return true; 304ff80afcfb2b00ccffcb6cb10528bec565fc59eddAnna Zaks 305ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek // Is this an expression that is consumed by another expression? If so, 306ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek // postpone cleaning out the state. 307ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek ParentMap &PM = LC->getAnalysisDeclContext()->getParentMap(); 308ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek return !PM.isConsumedExpr(cast<Expr>(S.getStmt())); 309ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek} 310ce117a7d289f57f792e5cc3294280cfe070433deTed Kremenek 3110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::removeDead(ExplodedNode *Pred, ExplodedNodeSet &Out, 3120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *ReferenceStmt, 31384c484545c5906ba55143e212b4a5275ab55889fJordan Rose const LocationContext *LC, 3140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *DiagnosticStmt, 3150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::Kind K) { 3160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks assert((K == ProgramPoint::PreStmtPurgeDeadSymbolsKind || 31784c484545c5906ba55143e212b4a5275ab55889fJordan Rose ReferenceStmt == 0 || isa<ReturnStmt>(ReferenceStmt)) 3188501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks && "PostStmt is not generally supported by the SymbolReaper yet"); 31984c484545c5906ba55143e212b4a5275ab55889fJordan Rose assert(LC && "Must pass the current (or expiring) LocationContext"); 32084c484545c5906ba55143e212b4a5275ab55889fJordan Rose 32184c484545c5906ba55143e212b4a5275ab55889fJordan Rose if (!DiagnosticStmt) { 32284c484545c5906ba55143e212b4a5275ab55889fJordan Rose DiagnosticStmt = ReferenceStmt; 32384c484545c5906ba55143e212b4a5275ab55889fJordan Rose assert(DiagnosticStmt && "Required for clearing a LocationContext"); 32484c484545c5906ba55143e212b4a5275ab55889fJordan Rose } 32584c484545c5906ba55143e212b4a5275ab55889fJordan Rose 3260b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NumRemoveDeadBindings++; 3279428723d6730f4fd257e15b78d24991ae95bbd84Jordan Rose ProgramStateRef CleanedState = Pred->getState(); 32884c484545c5906ba55143e212b4a5275ab55889fJordan Rose 32984c484545c5906ba55143e212b4a5275ab55889fJordan Rose // LC is the location context being destroyed, but SymbolReaper wants a 33084c484545c5906ba55143e212b4a5275ab55889fJordan Rose // location context that is still live. (If this is the top-level stack 33184c484545c5906ba55143e212b4a5275ab55889fJordan Rose // frame, this will be null.) 33284c484545c5906ba55143e212b4a5275ab55889fJordan Rose if (!ReferenceStmt) { 33384c484545c5906ba55143e212b4a5275ab55889fJordan Rose assert(K == ProgramPoint::PostStmtPurgeDeadSymbolsKind && 33484c484545c5906ba55143e212b4a5275ab55889fJordan Rose "Use PostStmtPurgeDeadSymbolsKind for clearing a LocationContext"); 33584c484545c5906ba55143e212b4a5275ab55889fJordan Rose LC = LC->getParent(); 33684c484545c5906ba55143e212b4a5275ab55889fJordan Rose } 33784c484545c5906ba55143e212b4a5275ab55889fJordan Rose 33884c484545c5906ba55143e212b4a5275ab55889fJordan Rose const StackFrameContext *SFC = LC ? LC->getCurrentStackFrame() : 0; 33984c484545c5906ba55143e212b4a5275ab55889fJordan Rose SymbolReaper SymReaper(SFC, ReferenceStmt, SymMgr, getStoreManager()); 3400b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3410b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks getCheckerManager().runCheckersForLiveSymbols(CleanedState, SymReaper); 3420b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3430b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Create a state in which dead bindings are removed from the environment 3440b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // and the store. TODO: The function should just return new env and store, 3450b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // not a new state. 3460b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CleanedState = StateMgr.removeDeadBindings(CleanedState, SFC, SymReaper); 347241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek 34877d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek // Process any special transfer function for dead symbols. 349f185cc1ac77a84139c603eee3473b88dcb839c68Anna Zaks // A tag to track convenience transitions, which can be removed at cleanup. 350f185cc1ac77a84139c603eee3473b88dcb839c68Anna Zaks static SimpleProgramPointTag cleanupTag("ExprEngine : Clean Node"); 3516bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks if (!SymReaper.hasDeadSymbols()) { 3526bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // Generate a CleanedNode that has the environment and store cleaned 3536bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // up. Since no symbols are dead, we can optimize and not clean out 3546bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // the constraint manager. 35566c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, Out, *currBldrCtx); 356fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(DiagnosticStmt, Pred, CleanedState, &cleanupTag, K); 3571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3586bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks } else { 3596bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // Call checkers with the non-cleaned state so that they could query the 3606bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // values of the soon to be dead symbols. 361fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose ExplodedNodeSet CheckedSet; 3620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks getCheckerManager().runCheckersForDeadSymbols(CheckedSet, Pred, SymReaper, 3630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks DiagnosticStmt, *this, K); 364183ff98f425d470c2a0276880aaf43496c9dad14Argyrios Kyrtzidis 365fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose // For each node in CheckedSet, generate CleanedNodes that have the 366fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose // environment, the store, and the constraints cleaned up but have the 367fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose // user-supplied states as the predecessors. 36866c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(CheckedSet, Out, *currBldrCtx); 369fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose for (ExplodedNodeSet::const_iterator 370fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose I = CheckedSet.begin(), E = CheckedSet.end(); I != E; ++I) { 3718bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef CheckerState = (*I)->getState(); 3726bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks 3736bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // The constraint manager has not been cleaned up yet, so clean up now. 3746bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks CheckerState = getConstraintManager().removeDeadBindings(CheckerState, 3756bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks SymReaper); 3766bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks 3770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks assert(StateMgr.haveEqualEnvironments(CheckerState, Pred->getState()) && 3786bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks "Checkers are not allowed to modify the Environment as a part of " 3796bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks "checkDeadSymbols processing."); 3800b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks assert(StateMgr.haveEqualStores(CheckerState, Pred->getState()) && 3816bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks "Checkers are not allowed to modify the Store as a part of " 3826bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks "checkDeadSymbols processing."); 3836bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks 3846bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // Create a state based on CleanedState with CheckerState GDM and 3856bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks // generate a transition to that state. 3868bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef CleanedCheckerSt = 3876bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks StateMgr.getPersistentStateWithGDM(CleanedState, CheckerState); 388fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(DiagnosticStmt, *I, CleanedCheckerSt, &cleanupTag, K); 3896bd528b9d703fdea51053719d9c53504a61a6bd7Anna Zaks } 39077d7ef8d8a80ccb2ab3d25c80810571e3ab14ee4Ted Kremenek } 3910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks} 3920b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3930b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::ProcessStmt(const CFGStmt S, 3940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNode *Pred) { 3950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Reclaim any unnecessary nodes in the ExplodedGraph. 3960b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks G.reclaimRecentlyAllocatedNodes(); 3970b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3989428723d6730f4fd257e15b78d24991ae95bbd84Jordan Rose const Stmt *currStmt = S.getStmt(); 3990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 40066c486f275531df6362b3511fc3af6563561801bTed Kremenek currStmt->getLocStart(), 4010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks "Error evaluating statement"); 4021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Remove dead bindings and symbols. 4040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedStates; 4059428723d6730f4fd257e15b78d24991ae95bbd84Jordan Rose if (shouldRemoveDeadBindings(AMgr, S, Pred, Pred->getLocationContext())){ 4069428723d6730f4fd257e15b78d24991ae95bbd84Jordan Rose removeDead(Pred, CleanedStates, currStmt, Pred->getLocationContext()); 4070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } else 4089428723d6730f4fd257e15b78d24991ae95bbd84Jordan Rose CleanedStates.Add(Pred); 4090b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 4100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Visit the statement. 411dd7ddf2b2296f95e7591ca3f9791f0eb9a15ee42Anna Zaks ExplodedNodeSet Dst; 4120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedStates.begin(), 4130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedStates.end(); I != E; ++I) { 414dd7ddf2b2296f95e7591ca3f9791f0eb9a15ee42Anna Zaks ExplodedNodeSet DstI; 4151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Visit the statement. 41666c486f275531df6362b3511fc3af6563561801bTed Kremenek Visit(currStmt, *I, DstI); 417dd7ddf2b2296f95e7591ca3f9791f0eb9a15ee42Anna Zaks Dst.insert(DstI); 418ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks } 419ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 420dd7ddf2b2296f95e7591ca3f9791f0eb9a15ee42Anna Zaks // Enqueue the new nodes onto the work list. 42166c486f275531df6362b3511fc3af6563561801bTed Kremenek Engine.enqueue(Dst, currBldrCtx->getBlock(), currStmtIdx); 422e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 423e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 424d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessInitializer(const CFGInitializer Init, 425056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks ExplodedNode *Pred) { 426cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt const CXXCtorInitializer *BMI = Init.getInitializer(); 427563ea2335d7d0df44bbfe8941f64523e8af1fc14Jordan Rose 428563ea2335d7d0df44bbfe8941f64523e8af1fc14Jordan Rose PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 429563ea2335d7d0df44bbfe8941f64523e8af1fc14Jordan Rose BMI->getSourceLocation(), 430563ea2335d7d0df44bbfe8941f64523e8af1fc14Jordan Rose "Error evaluating initializer"); 431563ea2335d7d0df44bbfe8941f64523e8af1fc14Jordan Rose 4329428723d6730f4fd257e15b78d24991ae95bbd84Jordan Rose // We don't clean up dead bindings here. 433056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks const StackFrameContext *stackFrame = 434056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks cast<StackFrameContext>(Pred->getLocationContext()); 435056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks const CXXConstructorDecl *decl = 436056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks cast<CXXConstructorDecl>(stackFrame->getDecl()); 4373682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose 4383682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose ProgramStateRef State = Pred->getState(); 4393a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose SVal thisVal = State->getSVal(svalBuilder.getCXXThis(decl, stackFrame)); 4409dc84c9455df2a77195147d0210c915dc1775a88Zhongxing Xu 4413682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose PostInitializer PP(BMI, stackFrame); 4423682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose ExplodedNodeSet Tmp(Pred); 4433682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose 4443a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // Evaluate the initializer, if necessary 44500eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet if (BMI->isAnyMemberInitializer()) { 4463a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // Constructors build the object directly in the field, 4473a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // but non-objects must be copied in from the initializer. 44807c52d2813a6b5e4025276d3687bd25f75fd51b9Jordan Rose const Expr *Init = BMI->getInit()->IgnoreImplicit(); 4493682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose if (!isa<CXXConstructExpr>(Init)) { 450ecee1651c100342366a9417c85c6e50399039930Jordan Rose const ValueDecl *Field; 4513a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose SVal FieldLoc; 452ecee1651c100342366a9417c85c6e50399039930Jordan Rose if (BMI->isIndirectMemberInitializer()) { 453ecee1651c100342366a9417c85c6e50399039930Jordan Rose Field = BMI->getIndirectMember(); 4543a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose FieldLoc = State->getLValue(BMI->getIndirectMember(), thisVal); 455ecee1651c100342366a9417c85c6e50399039930Jordan Rose } else { 456ecee1651c100342366a9417c85c6e50399039930Jordan Rose Field = BMI->getMember(); 4573a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose FieldLoc = State->getLValue(BMI->getMember(), thisVal); 458ecee1651c100342366a9417c85c6e50399039930Jordan Rose } 4593a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose 460ecee1651c100342366a9417c85c6e50399039930Jordan Rose SVal InitVal; 461ecee1651c100342366a9417c85c6e50399039930Jordan Rose if (BMI->getNumArrayIndices() > 0) { 462ecee1651c100342366a9417c85c6e50399039930Jordan Rose // Handle arrays of trivial type. We can represent this with a 463ecee1651c100342366a9417c85c6e50399039930Jordan Rose // primitive load/copy from the base array region. 464ecee1651c100342366a9417c85c6e50399039930Jordan Rose const ArraySubscriptExpr *ASE; 465ecee1651c100342366a9417c85c6e50399039930Jordan Rose while ((ASE = dyn_cast<ArraySubscriptExpr>(Init))) 466ecee1651c100342366a9417c85c6e50399039930Jordan Rose Init = ASE->getBase()->IgnoreImplicit(); 467ecee1651c100342366a9417c85c6e50399039930Jordan Rose 468ecee1651c100342366a9417c85c6e50399039930Jordan Rose SVal LValue = State->getSVal(Init, stackFrame); 469ecee1651c100342366a9417c85c6e50399039930Jordan Rose if (Optional<Loc> LValueLoc = LValue.getAs<Loc>()) 470ecee1651c100342366a9417c85c6e50399039930Jordan Rose InitVal = State->getSVal(*LValueLoc); 471ecee1651c100342366a9417c85c6e50399039930Jordan Rose 472ecee1651c100342366a9417c85c6e50399039930Jordan Rose // If we fail to get the value for some reason, use a symbolic value. 473ecee1651c100342366a9417c85c6e50399039930Jordan Rose if (InitVal.isUnknownOrUndef()) { 474ecee1651c100342366a9417c85c6e50399039930Jordan Rose SValBuilder &SVB = getSValBuilder(); 475ecee1651c100342366a9417c85c6e50399039930Jordan Rose InitVal = SVB.conjureSymbolVal(BMI->getInit(), stackFrame, 476ecee1651c100342366a9417c85c6e50399039930Jordan Rose Field->getType(), 477ecee1651c100342366a9417c85c6e50399039930Jordan Rose currBldrCtx->blockCount()); 478ecee1651c100342366a9417c85c6e50399039930Jordan Rose } 479ecee1651c100342366a9417c85c6e50399039930Jordan Rose } else { 480ecee1651c100342366a9417c85c6e50399039930Jordan Rose InitVal = State->getSVal(BMI->getInit(), stackFrame); 481ecee1651c100342366a9417c85c6e50399039930Jordan Rose } 4823682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose 483ecee1651c100342366a9417c85c6e50399039930Jordan Rose assert(Tmp.size() == 1 && "have not generated any new nodes yet"); 484ecee1651c100342366a9417c85c6e50399039930Jordan Rose assert(*Tmp.begin() == Pred && "have not generated any new nodes yet"); 4853682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose Tmp.clear(); 4863682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose evalBind(Tmp, Init, Pred, FieldLoc, InitVal, /*isInit=*/true, &PP); 4873a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose } 488056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks } else { 489563ea2335d7d0df44bbfe8941f64523e8af1fc14Jordan Rose assert(BMI->isBaseInitializer() || BMI->isDelegatingInitializer()); 490888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // We already did all the work when visiting the CXXConstructExpr. 491056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks } 492dd7ddf2b2296f95e7591ca3f9791f0eb9a15ee42Anna Zaks 4933682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose // Construct PostInitializer nodes whether the state changed or not, 4943a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // so that the diagnostics don't get confused. 4953682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose ExplodedNodeSet Dst; 4963682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose NodeBuilder Bldr(Tmp, Dst, *currBldrCtx); 4973682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I != E; ++I) { 4983682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose ExplodedNode *N = *I; 4993682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose Bldr.generateNode(PP, N->getState(), N); 5003682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose } 5013a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose 502dd7ddf2b2296f95e7591ca3f9791f0eb9a15ee42Anna Zaks // Enqueue the new nodes onto the work list. 50366c486f275531df6362b3511fc3af6563561801bTed Kremenek Engine.enqueue(Dst, currBldrCtx->getBlock(), currStmtIdx); 5049c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu} 5059c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 506d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessImplicitDtor(const CFGImplicitDtor D, 507ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks ExplodedNode *Pred) { 508ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks ExplodedNodeSet Dst; 5093c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek switch (D.getKind()) { 5104ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::AutomaticObjectDtor: 511fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie ProcessAutomaticObjDtor(D.castAs<CFGAutomaticObjDtor>(), Pred, Dst); 5124ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 5134ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::BaseDtor: 514fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie ProcessBaseDtor(D.castAs<CFGBaseDtor>(), Pred, Dst); 5154ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 5164ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::MemberDtor: 517fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie ProcessMemberDtor(D.castAs<CFGMemberDtor>(), Pred, Dst); 5184ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 5194ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu case CFGElement::TemporaryDtor: 520fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie ProcessTemporaryDtor(D.castAs<CFGTemporaryDtor>(), Pred, Dst); 5214ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu break; 5224ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu default: 5234ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu llvm_unreachable("Unexpected dtor kind."); 5244ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu } 525ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 526dd7ddf2b2296f95e7591ca3f9791f0eb9a15ee42Anna Zaks // Enqueue the new nodes onto the work list. 52766c486f275531df6362b3511fc3af6563561801bTed Kremenek Engine.enqueue(Dst, currBldrCtx->getBlock(), currStmtIdx); 5284ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 5294ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 530056c4b46335a3bd2612414735d5749ee159c0165Anna Zaksvoid ExprEngine::ProcessAutomaticObjDtor(const CFGAutomaticObjDtor Dtor, 531056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks ExplodedNode *Pred, 532056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks ExplodedNodeSet &Dst) { 533056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks const VarDecl *varDecl = Dtor.getVarDecl(); 5342210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu QualType varType = varDecl->getType(); 5352210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 53608291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose ProgramStateRef state = Pred->getState(); 53708291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose SVal dest = state->getLValue(varDecl, Pred->getLocationContext()); 53808291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose const MemRegion *Region = dest.castAs<loc::MemRegionVal>().getRegion(); 5392210490e6d099b7a5b4f68f44a136e4dcf3cdea2Zhongxing Xu 54008291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose if (const ReferenceType *refType = varType->getAs<ReferenceType>()) { 54108291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose varType = refType->getPointeeType(); 54208291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose Region = state->getSVal(Region).getAsRegion(); 54308291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose } 544b13453bd8a91f331d0910ca95ad52aa41b52f648Zhongxing Xu 54508291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose VisitCXXDestructor(varType, Region, Dtor.getTriggerStmt(), /*IsBase=*/ false, 54608291a937a149dbd036fd6ac8ab061eb8034343dJordan Rose Pred, Dst); 5474ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu} 5484ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 549d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessBaseDtor(const CFGBaseDtor D, 550888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose ExplodedNode *Pred, ExplodedNodeSet &Dst) { 551888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 552888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose ProgramStateRef State = Pred->getState(); 553888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 554888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const CXXDestructorDecl *CurDtor = cast<CXXDestructorDecl>(LCtx->getDecl()); 555888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Loc ThisPtr = getSValBuilder().getCXXThis(CurDtor, 556888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose LCtx->getCurrentStackFrame()); 557888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose SVal ThisVal = Pred->getState()->getSVal(ThisPtr); 558888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 559888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Create the base object region. 5604411b423e91da0a2c879b70c0222aeba35f72044Jordan Rose const CXXBaseSpecifier *Base = D.getBaseSpecifier(); 5614411b423e91da0a2c879b70c0222aeba35f72044Jordan Rose QualType BaseTy = Base->getType(); 5624411b423e91da0a2c879b70c0222aeba35f72044Jordan Rose SVal BaseVal = getStoreManager().evalDerivedToBase(ThisVal, BaseTy, 5634411b423e91da0a2c879b70c0222aeba35f72044Jordan Rose Base->isVirtual()); 564888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 5655251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie VisitCXXDestructor(BaseTy, BaseVal.castAs<loc::MemRegionVal>().getRegion(), 5665251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie CurDtor->getBody(), /*IsBase=*/ true, Pred, Dst); 567888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose} 5684ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 569d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessMemberDtor(const CFGMemberDtor D, 5703a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose ExplodedNode *Pred, ExplodedNodeSet &Dst) { 5713a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose const FieldDecl *Member = D.getFieldDecl(); 5723a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose ProgramStateRef State = Pred->getState(); 5733a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 5743a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose 5753a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose const CXXDestructorDecl *CurDtor = cast<CXXDestructorDecl>(LCtx->getDecl()); 5763a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose Loc ThisVal = getSValBuilder().getCXXThis(CurDtor, 5773a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose LCtx->getCurrentStackFrame()); 5785251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie SVal FieldVal = 5795251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie State->getLValue(Member, State->getSVal(ThisVal).castAs<Loc>()); 5803a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose 5813a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose VisitCXXDestructor(Member->getType(), 5825251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie FieldVal.castAs<loc::MemRegionVal>().getRegion(), 583200fa2e70d52ae6d620e81cd45536071fdde70c0Jordan Rose CurDtor->getBody(), /*IsBase=*/false, Pred, Dst); 5843a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose} 5854ffcb9974c6b7142c4a1483abfcb1f88b6371c45Zhongxing Xu 586d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ProcessTemporaryDtor(const CFGTemporaryDtor D, 587056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks ExplodedNode *Pred, 588056c4b46335a3bd2612414735d5749ee159c0165Anna Zaks ExplodedNodeSet &Dst) {} 5899c6cd67ea416bace666d614c84d5531124287653Zhongxing Xu 59048b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rosevoid ExprEngine::Visit(const Stmt *S, ExplodedNode *Pred, 5916889679d72859960e0fc8d1080487f63c4df1e0aAnna Zaks ExplodedNodeSet &DstTop) { 5920bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 5930bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek S->getLocStart(), 5940bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek "Error evaluating statement"); 5956889679d72859960e0fc8d1080487f63c4df1e0aAnna Zaks ExplodedNodeSet Dst; 59666c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, DstTop, *currBldrCtx); 5970bed8a12f2878d3cd94fb8bdba55b593d92dd11aTed Kremenek 598e9cd031c77a92015571425b6445e8867816997cdJordan Rose assert(!isa<Expr>(S) || S == cast<Expr>(S)->IgnoreParens()); 5991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 600e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek switch (S->getStmtClass()) { 601f85e193739c953358c865005855253af4f68a497John McCall // C++ and ARC stuff we don't support yet. 602f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCIndirectCopyRestoreExprClass: 6031b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXDependentScopeMemberExprClass: 6041b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXPseudoDestructorExprClass: 6051b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTryStmtClass: 6061b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CXXTypeidExprClass: 6079be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Stmt::CXXUuidofExprClass: 608c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::CXXUnresolvedConstructExprClass: 6091b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DependentScopeDeclRefExprClass: 6101b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnaryTypeTraitExprClass: 6116ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Stmt::BinaryTypeTraitExprClass: 6124ca8ac2e61c37ddadf37024af86f3e1019af8532Douglas Gregor case Stmt::TypeTraitExprClass: 61321ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley case Stmt::ArrayTypeTraitExprClass: 614552622067dc45013d240f73952fece703f5e63bdJohn Wiegley case Stmt::ExpressionTraitExprClass: 6151b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::UnresolvedLookupExprClass: 616c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek case Stmt::UnresolvedMemberExprClass: 6176b219d082434394c1ac401390ec1d1967727815aSebastian Redl case Stmt::CXXNoexceptExprClass: 618be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor case Stmt::PackExpansionExprClass: 619c7793c73ba8a343de3f2552d984851985a46f159Douglas Gregor case Stmt::SubstNonTypeTemplateParmPackExprClass: 6209a4db032ecd991626d236a502e770126db32bd31Richard Smith case Stmt::FunctionParmPackExprClass: 62128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHTryStmtClass: 62228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley case Stmt::SEHExceptStmtClass: 62301d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor case Stmt::LambdaExprClass: 624ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks case Stmt::SEHFinallyStmtClass: { 625fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose const ExplodedNode *node = Bldr.generateSink(S, Pred, Pred->getState()); 62666c486f275531df6362b3511fc3af6563561801bTed Kremenek Engine.addAbortedBlock(node, currBldrCtx->getBlock()); 627c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek break; 628c768a0c46e6c064c3281d663777ee95aea8652eeTed Kremenek } 6295fe98728dca1f3a7a378ce1a21984a0f8a0c0b8bTed Kremenek 630f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall case Stmt::ParenExprClass: 631f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall llvm_unreachable("ParenExprs already handled."); 632f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne case Stmt::GenericSelectionExprClass: 633f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne llvm_unreachable("GenericSelectionExprs already handled."); 6341b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases that should never be evaluated simply because they shouldn't 6351b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // appear in the CFG. 6361b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::BreakStmtClass: 6371b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CaseStmtClass: 6381b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::CompoundStmtClass: 6391b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ContinueStmtClass: 64046eaf7789a1059a7b42b7dbd183150c72df5738fTed Kremenek case Stmt::CXXForRangeStmtClass: 6411b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DefaultStmtClass: 6421b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DoStmtClass: 643d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::ForStmtClass: 6441b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::GotoStmtClass: 645d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::IfStmtClass: 6461b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::IndirectGotoStmtClass: 6471b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::LabelStmtClass: 648534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith case Stmt::AttributedStmtClass: 6491b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NoStmtClass: 6501b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::NullStmtClass: 651d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::SwitchStmtClass: 652d40066b0fb883839a9100e5455e33190b9b8abacTed Kremenek case Stmt::WhileStmtClass: 653ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor case Expr::MSDependentExistsStmtClass: 6541b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek llvm_unreachable("Stmt should not be in analyzer evaluation loop"); 6551b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 6564ccc4cc5d4e7c5c436d5f45065d3639cfc7c6e48Jordan Rose case Stmt::ObjCSubscriptRefExprClass: 6574ccc4cc5d4e7c5c436d5f45065d3639cfc7c6e48Jordan Rose case Stmt::ObjCPropertyRefExprClass: 6584ccc4cc5d4e7c5c436d5f45065d3639cfc7c6e48Jordan Rose llvm_unreachable("These are handled by PseudoObjectExpr"); 6594ccc4cc5d4e7c5c436d5f45065d3639cfc7c6e48Jordan Rose 6608ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek case Stmt::GNUNullExprClass: { 6618f08426e6f54ed20b959018f24dbea106a00b4adJordy Rose // GNU __null is a pointer-width integer, not an actual pointer. 6628bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 6635eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state = state->BindExpr(S, Pred->getLocationContext(), 6645eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek svalBuilder.makeIntValWithPtrWidth(0, false)); 665ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(S, Pred, state); 6668ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek break; 6678ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek } 6688ad9cbc518a603176462f1fa1efe389023590082Ted Kremenek 6694beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 670ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 6714beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S), Pred, Dst); 672ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 6734beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek break; 6744beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 675ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks case Stmt::ExprWithCleanupsClass: 676e711d7e7875920fee4180a26bfc67d67f0f71a2cErik Verbruggen // Handled due to fully linearised CFG. 677f85e193739c953358c865005855253af4f68a497John McCall break; 678f85e193739c953358c865005855253af4f68a497John McCall 6791b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases not handled yet; but will handle some day. 6801b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::DesignatedInitExprClass: 6811b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ExtVectorElementExprClass: 6821b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ImaginaryLiteralClass: 6831b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtCatchStmtClass: 6841b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtFinallyStmtClass: 6851b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCAtTryStmtClass: 686f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ObjCAutoreleasePoolStmtClass: 6871b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCEncodeExprClass: 6881b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCIsaExprClass: 6891b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCProtocolExprClass: 6901b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ObjCSelectorExprClass: 6911b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ParenListExprClass: 6921b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::PredefinedExprClass: 6931b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::ShuffleVectorExprClass: 6941b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek case Stmt::VAArgExprClass: 695e08ce650a2b02410eddd1f60a4aa6b3d4be71e73Peter Collingbourne case Stmt::CUDAKernelCallExprClass: 69656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::OpaqueValueExprClass: 69761eee0ca33b29e102f11bab77c8b74cc00e2392bTanya Lattner case Stmt::AsTypeExprClass: 698276b061970939293f1abaf694bd3ef05b2cbda79Eli Friedman case Stmt::AtomicExprClass: 699337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek // Fall through. 7001b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek 7011b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // Cases we intentionally don't evaluate, since they don't need 7021b49d762e9658b6b6d1b677dca005324a7b1126dTed Kremenek // to be explicitly evaluated. 703bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::AddrLabelExprClass: 704bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::IntegerLiteralClass: 705bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::CharacterLiteralClass: 706c319c585c0d5899cba0dca2272e6e4909c8b9f16Ted Kremenek case Stmt::ImplicitValueInitExprClass: 707c319c585c0d5899cba0dca2272e6e4909c8b9f16Ted Kremenek case Stmt::CXXScalarValueInitExprClass: 708477323d58a0de352c6a61e08b5a83127c4adc904Zhongxing Xu case Stmt::CXXBoolLiteralExprClass: 7091a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek case Stmt::ObjCBoolLiteralExprClass: 710bc9ad74a13e83303a3a5251f8bacbbca17341c17Zhongxing Xu case Stmt::FloatingLiteralClass: 711f901a7de97f46ba2b1ff153f9fb83d00dc37cfcfDouglas Gregor case Stmt::SizeOfPackExprClass: 712e739a29c62c67eaec0af5c4d5c75f9e8f11228bdTed Kremenek case Stmt::StringLiteralClass: 713e739a29c62c67eaec0af5c4d5c75f9e8f11228bdTed Kremenek case Stmt::ObjCStringLiteralClass: 714cc2c4b293d8590346f26b7ecc16d299226b8794fTed Kremenek case Stmt::CXXBindTemporaryExprClass: 71569a0e5021c5c49a34aa25cd89b1e613a52097e65Jordan Rose case Stmt::SubstNonTypeTemplateParmExprClass: 716bdd4c848349d4091d66b052efa453e6d69a77e36Ted Kremenek case Stmt::CXXNullPtrLiteralExprClass: { 717bdd4c848349d4091d66b052efa453e6d69a77e36Ted Kremenek Bldr.takeNodes(Pred); 718bdd4c848349d4091d66b052efa453e6d69a77e36Ted Kremenek ExplodedNodeSet preVisit; 719bdd4c848349d4091d66b052efa453e6d69a77e36Ted Kremenek getCheckerManager().runCheckersForPreStmt(preVisit, Pred, S, *this); 720bdd4c848349d4091d66b052efa453e6d69a77e36Ted Kremenek getCheckerManager().runCheckersForPostStmt(Dst, preVisit, S, *this); 721bdd4c848349d4091d66b052efa453e6d69a77e36Ted Kremenek Bldr.addNodes(Dst); 722e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 723bdd4c848349d4091d66b052efa453e6d69a77e36Ted Kremenek } 7241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 72538f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose case Stmt::CXXDefaultArgExprClass: { 72638f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose Bldr.takeNodes(Pred); 72738f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose ExplodedNodeSet PreVisit; 72838f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose getCheckerManager().runCheckersForPreStmt(PreVisit, Pred, S, *this); 72938f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 73038f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose ExplodedNodeSet Tmp; 73138f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose StmtNodeBuilder Bldr2(PreVisit, Tmp, *currBldrCtx); 73238f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 73338f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 734fbdbed3bde8577815826b9d15790e5effb913f7bJordan Rose const CXXDefaultArgExpr *DefaultE = cast<CXXDefaultArgExpr>(S); 735fbdbed3bde8577815826b9d15790e5effb913f7bJordan Rose const Expr *ArgE = DefaultE->getExpr(); 73638f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 73738f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose // Avoid creating and destroying a lot of APSInts. 73838f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose SVal V; 73938f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose llvm::APSInt Result; 74038f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 74138f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose for (ExplodedNodeSet::iterator I = PreVisit.begin(), E = PreVisit.end(); 74238f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose I != E; ++I) { 74338f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose ProgramStateRef State = (*I)->getState(); 74438f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 74538f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose if (ArgE->EvaluateAsInt(Result, getContext())) 74638f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose V = svalBuilder.makeIntVal(Result); 74738f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose else 74838f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose V = State->getSVal(ArgE, LCtx); 74938f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 750fbdbed3bde8577815826b9d15790e5effb913f7bJordan Rose State = State->BindExpr(DefaultE, LCtx, V); 751fbdbed3bde8577815826b9d15790e5effb913f7bJordan Rose if (DefaultE->isGLValue()) 752eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose State = createTemporaryRegionIfNeeded(State, LCtx, DefaultE, 753eafb5c694cc5d165149fcb9453bc9355fb0d44a5Jordan Rose DefaultE); 75438f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose Bldr2.generateNode(S, *I, State); 75538f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose } 75638f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 75738f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose getCheckerManager().runCheckersForPostStmt(Dst, Tmp, S, *this); 75838f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose Bldr.addNodes(Dst); 75938f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose break; 76038f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose } 76138f68ef19cb51d5876e9025b5fceb44b33ec9ed7Jordan Rose 7621a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek case Expr::ObjCArrayLiteralClass: 76370fdbc366da85880aae5baebd3351e993ca05603Jordy Rose case Expr::ObjCDictionaryLiteralClass: 76470fdbc366da85880aae5baebd3351e993ca05603Jordy Rose // FIXME: explicitly model with a region and the actual contents 76570fdbc366da85880aae5baebd3351e993ca05603Jordy Rose // of the container. For now, conjure a symbol. 76670fdbc366da85880aae5baebd3351e993ca05603Jordy Rose case Expr::ObjCBoxedExprClass: { 7671a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek Bldr.takeNodes(Pred); 7681a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek 7691a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek ExplodedNodeSet preVisit; 7701a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek getCheckerManager().runCheckersForPreStmt(preVisit, Pred, S, *this); 7711a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek 7721a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek ExplodedNodeSet Tmp; 77366c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr2(preVisit, Tmp, *currBldrCtx); 7741a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek 77570fdbc366da85880aae5baebd3351e993ca05603Jordy Rose const Expr *Ex = cast<Expr>(S); 77670fdbc366da85880aae5baebd3351e993ca05603Jordy Rose QualType resultType = Ex->getType(); 77770fdbc366da85880aae5baebd3351e993ca05603Jordy Rose 7781a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek for (ExplodedNodeSet::iterator it = preVisit.begin(), et = preVisit.end(); 7791a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek it != et; ++it) { 7801a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek ExplodedNode *N = *it; 7811a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek const LocationContext *LCtx = N->getLocationContext(); 7823b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek SVal result = svalBuilder.conjureSymbolVal(0, Ex, LCtx, resultType, 78366c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->blockCount()); 7841a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek ProgramStateRef state = N->getState()->BindExpr(Ex, LCtx, result); 7851a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek Bldr2.generateNode(S, N, state); 7861a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek } 7871a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek 7881a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek getCheckerManager().runCheckersForPostStmt(Dst, Tmp, S, *this); 7891a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek Bldr.addNodes(Dst); 7901a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek break; 7911a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek } 7921a45a5ff5d495cb6cd9a3d4d06317af79c0f634dTed Kremenek 793540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek case Stmt::ArraySubscriptExprClass: 794ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 795892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalArraySubscriptExpr(cast<ArraySubscriptExpr>(S), Pred, Dst); 796ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 797540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek break; 7981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 799df5faf5e7ae6823d0af0b801c4ac26d47f2cee97Chad Rosier case Stmt::GCCAsmStmtClass: 800ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 801df5faf5e7ae6823d0af0b801c4ac26d47f2cee97Chad Rosier VisitGCCAsmStmt(cast<GCCAsmStmt>(S), Pred, Dst); 802ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 803e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 804b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 8058cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier case Stmt::MSAsmStmtClass: 8068cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier Bldr.takeNodes(Pred); 8078cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier VisitMSAsmStmt(cast<MSAsmStmt>(S), Pred, Dst); 8088cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier Bldr.addNodes(Dst); 8098cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier break; 8108cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier 811c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek case Stmt::BlockExprClass: 812ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 813c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek VisitBlockExpr(cast<BlockExpr>(S), Pred, Dst); 814ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 815c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek break; 816c95ad9ff6e574aecdd759542d5578bc65d586d93Ted Kremenek 817e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::BinaryOperatorClass: { 81803509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const BinaryOperator* B = cast<BinaryOperator>(S); 819e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek if (B->isLogicalOp()) { 820ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 821e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitLogicalExpr(B, Pred, Dst); 822ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 823e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 824e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 8252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall else if (B->getOpcode() == BO_Comma) { 8268bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 827ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(B, Pred, 8285eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->BindExpr(B, Pred->getLocationContext(), 8295eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->getSVal(B->getRHS(), 8305eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek Pred->getLocationContext()))); 831e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 832e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 83306fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 834ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 835ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 8360caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek if (AMgr.options.eagerlyAssumeBinOpBifurcation && 837bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu (B->isRelationalOp() || B->isEqualityOp())) { 838031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 839892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Tmp); 8400caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek evalEagerlyAssumeBinOpBifurcation(Dst, Tmp, cast<Expr>(S)); 84148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 84248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek else 843892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 84448af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 845ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 846e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 847e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 84806fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 849f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose case Stmt::CXXOperatorCallExprClass: { 850f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose const CXXOperatorCallExpr *OCE = cast<CXXOperatorCallExpr>(S); 851f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose 852f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose // For instance method operators, make sure the 'this' argument has a 853f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose // valid region. 854f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose const Decl *Callee = OCE->getCalleeDecl(); 855f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(Callee)) { 856f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose if (MD->isInstance()) { 857f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose ProgramStateRef State = Pred->getState(); 858f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 859f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose ProgramStateRef NewState = 860f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose createTemporaryRegionIfNeeded(State, LCtx, OCE->getArg(0)); 861f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose if (NewState != State) 862f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose Pred = Bldr.generateNode(OCE, Pred, NewState, /*Tag=*/0, 863f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose ProgramPoint::PreStmtKind); 864f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose } 865f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose } 866f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose // FALLTHROUGH 867f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose } 868b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek case Stmt::CallExprClass: 8699fcce65e7e1307b5b8da9be13e4092d6bb94dc1dRichard Smith case Stmt::CXXMemberCallExprClass: 8709fcce65e7e1307b5b8da9be13e4092d6bb94dc1dRichard Smith case Stmt::UserDefinedLiteralClass: { 871ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 872b277159055933e610bbc80262b600d3ad7e0595cTed Kremenek VisitCallExpr(cast<CallExpr>(S), Pred, Dst); 873ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 87406fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek break; 875e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 876337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek 877337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek case Stmt::CXXCatchStmtClass: { 878337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek Bldr.takeNodes(Pred); 879337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek VisitCXXCatchStmt(cast<CXXCatchStmt>(S), Pred, Dst); 880337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek Bldr.addNodes(Dst); 881337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek break; 882337e4dbc6859589b8878146a88bebf754e916702Ted Kremenek } 88306fb99fb403bff1651429923f666a2ebe2b1522fTed Kremenek 884744f1cd66bb6747ea71fbf1172698e7bf35ec88dTed Kremenek case Stmt::CXXTemporaryObjectExprClass: 885888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose case Stmt::CXXConstructExprClass: { 886ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 887888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose VisitCXXConstructExpr(cast<CXXConstructExpr>(S), Pred, Dst); 888ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 8897ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu break; 8907ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu } 8917ce351db56fbce162a3b650518ce05b5c61ebf36Zhongxing Xu 892d74324371465a152387ac45e737ab7d23e543552Anton Yartsev case Stmt::CXXNewExprClass: { 893d74324371465a152387ac45e737ab7d23e543552Anton Yartsev Bldr.takeNodes(Pred); 894d74324371465a152387ac45e737ab7d23e543552Anton Yartsev ExplodedNodeSet PostVisit; 895d74324371465a152387ac45e737ab7d23e543552Anton Yartsev VisitCXXNewExpr(cast<CXXNewExpr>(S), Pred, PostVisit); 896d74324371465a152387ac45e737ab7d23e543552Anton Yartsev getCheckerManager().runCheckersForPostStmt(Dst, PostVisit, S, *this); 897d74324371465a152387ac45e737ab7d23e543552Anton Yartsev Bldr.addNodes(Dst); 898d74324371465a152387ac45e737ab7d23e543552Anton Yartsev break; 899d74324371465a152387ac45e737ab7d23e543552Anton Yartsev } 900d74324371465a152387ac45e737ab7d23e543552Anton Yartsev 901d74324371465a152387ac45e737ab7d23e543552Anton Yartsev case Stmt::CXXDeleteExprClass: { 902d74324371465a152387ac45e737ab7d23e543552Anton Yartsev Bldr.takeNodes(Pred); 903d74324371465a152387ac45e737ab7d23e543552Anton Yartsev ExplodedNodeSet PreVisit; 904d74324371465a152387ac45e737ab7d23e543552Anton Yartsev const CXXDeleteExpr *CDE = cast<CXXDeleteExpr>(S); 905d74324371465a152387ac45e737ab7d23e543552Anton Yartsev getCheckerManager().runCheckersForPreStmt(PreVisit, Pred, S, *this); 906d74324371465a152387ac45e737ab7d23e543552Anton Yartsev 907d74324371465a152387ac45e737ab7d23e543552Anton Yartsev for (ExplodedNodeSet::iterator i = PreVisit.begin(), 908d74324371465a152387ac45e737ab7d23e543552Anton Yartsev e = PreVisit.end(); i != e ; ++i) 909d74324371465a152387ac45e737ab7d23e543552Anton Yartsev VisitCXXDeleteExpr(CDE, *i, Dst); 910d74324371465a152387ac45e737ab7d23e543552Anton Yartsev 911d74324371465a152387ac45e737ab7d23e543552Anton Yartsev Bldr.addNodes(Dst); 912d74324371465a152387ac45e737ab7d23e543552Anton Yartsev break; 913d74324371465a152387ac45e737ab7d23e543552Anton Yartsev } 914e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // FIXME: ChooseExpr is really a constant. We need to fix 915e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek // the CFG do not model them as explicit control-flow. 9161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 917e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ChooseExprClass: { // __builtin_choose_expr 918ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 9199c378f705405d37f49795d5e915989de774fe11fTed Kremenek const ChooseExpr *C = cast<ChooseExpr>(S); 920e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitGuardedExpr(C, C->getLHS(), C->getRHS(), Pred, Dst); 921ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 922e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 923e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 9241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 925e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::CompoundAssignOperatorClass: 926ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 927892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitBinaryOperator(cast<BinaryOperator>(S), Pred, Dst); 928ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 929e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 930f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu 931f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu case Stmt::CompoundLiteralExprClass: 932ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 933892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCompoundLiteralExpr(cast<CompoundLiteralExpr>(S), Pred, Dst); 934ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 935f22679e3e5d5f5754931952e58112b4c863a4137Zhongxing Xu break; 9361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 93756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Stmt::BinaryConditionalOperatorClass: 938e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::ConditionalOperatorClass: { // '?' operator 939ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 94056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const AbstractConditionalOperator *C 94156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall = cast<AbstractConditionalOperator>(S); 94256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall VisitGuardedExpr(C, C->getTrueExpr(), C->getFalseExpr(), Pred, Dst); 943ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 944e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 945e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 9461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 947bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu case Stmt::CXXThisExprClass: 948ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 949bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu VisitCXXThisExpr(cast<CXXThisExpr>(S), Pred, Dst); 950ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 951bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu break; 952bb141217871e93767aa3f2de1b9946fa6d37066aZhongxing Xu 953892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek case Stmt::DeclRefExprClass: { 954ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 955892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek const DeclRefExpr *DE = cast<DeclRefExpr>(S); 956892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitCommonDeclRefExpr(DE, DE->getDecl(), Pred, Dst); 957ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 958e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 959892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 9601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 961e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::DeclStmtClass: 962ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 963e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek VisitDeclStmt(cast<DeclStmt>(S), Pred, Dst); 964ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 965e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 9661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9670835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis case Stmt::ImplicitCastExprClass: 9680d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CStyleCastExprClass: 9690d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXStaticCastExprClass: 9700d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXDynamicCastExprClass: 9710d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXReinterpretCastExprClass: 9720d9d736c49b51691ced96759ec99399824e2a602Zhongxing Xu case Stmt::CXXConstCastExprClass: 973f85e193739c953358c865005855253af4f68a497John McCall case Stmt::CXXFunctionalCastExprClass: 974f85e193739c953358c865005855253af4f68a497John McCall case Stmt::ObjCBridgedCastExprClass: { 975ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 9769c378f705405d37f49795d5e915989de774fe11fTed Kremenek const CastExpr *C = cast<CastExpr>(S); 977f85e193739c953358c865005855253af4f68a497John McCall // Handle the previsit checks. 978f85e193739c953358c865005855253af4f68a497John McCall ExplodedNodeSet dstPrevisit; 979f85e193739c953358c865005855253af4f68a497John McCall getCheckerManager().runCheckersForPreStmt(dstPrevisit, Pred, C, *this); 980f85e193739c953358c865005855253af4f68a497John McCall 981f85e193739c953358c865005855253af4f68a497John McCall // Handle the expression itself. 982f85e193739c953358c865005855253af4f68a497John McCall ExplodedNodeSet dstExpr; 983f85e193739c953358c865005855253af4f68a497John McCall for (ExplodedNodeSet::iterator i = dstPrevisit.begin(), 984f85e193739c953358c865005855253af4f68a497John McCall e = dstPrevisit.end(); i != e ; ++i) { 985f85e193739c953358c865005855253af4f68a497John McCall VisitCast(C, C->getSubExpr(), *i, dstExpr); 986f85e193739c953358c865005855253af4f68a497John McCall } 987f85e193739c953358c865005855253af4f68a497John McCall 988f85e193739c953358c865005855253af4f68a497John McCall // Handle the postvisit checks. 989f85e193739c953358c865005855253af4f68a497John McCall getCheckerManager().runCheckersForPostStmt(Dst, dstExpr, C, *this); 990ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 991e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 992e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 993b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 99403e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor case Expr::MaterializeTemporaryExprClass: { 995ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 996c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose const MaterializeTemporaryExpr *MTE = cast<MaterializeTemporaryExpr>(S); 997c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose CreateCXXTemporaryObject(MTE, Pred, Dst); 998ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 99903e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor break; 100003e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor } 100103e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor 1002c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu case Stmt::InitListExprClass: 1003ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1004c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu VisitInitListExpr(cast<InitListExpr>(S), Pred, Dst); 1005ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 1006c4f8706b6539e06a5de153bd72850bb2e0a71456Zhongxing Xu break; 10071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 100897ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::MemberExprClass: 1009ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1010892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitMemberExpr(cast<MemberExpr>(S), Pred, Dst); 1011ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 1012469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek break; 1013ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 101497ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek case Stmt::ObjCIvarRefExprClass: 1015ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1016892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitLvalObjCIvarRefExpr(cast<ObjCIvarRefExpr>(S), Pred, Dst); 1017ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 101897ed4f68f5dba3e21e7a490ef0f9ffd3bfead7f8Ted Kremenek break; 1019af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek 1020af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 1021ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1022af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S), Pred, Dst); 1023ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 1024af3374187c47acea45706eab6744be6b1c66a856Ted Kremenek break; 10251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1026d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose case Stmt::ObjCMessageExprClass: 1027ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1028d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose VisitObjCMessage(cast<ObjCMessageExpr>(S), Pred, Dst); 1029ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 1030e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 10311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1032c32a453e40b2c8878fed10512fb2f570b7aba576Jordan Rose case Stmt::ObjCAtThrowStmtClass: 1033c32a453e40b2c8878fed10512fb2f570b7aba576Jordan Rose case Stmt::CXXThrowExprClass: 1034bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // FIXME: This is not complete. We basically treat @throw as 1035bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek // an abort. 1036fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateSink(S, Pred, Pred->getState()); 1037bbfd07a0c94f659beaf74316029ef73769cefb81Ted Kremenek break; 10381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10391b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek case Stmt::ReturnStmtClass: 1040ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 10411b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek VisitReturnStmt(cast<ReturnStmt>(S), Pred, Dst); 1042ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 10431b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 10441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10458ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case Stmt::OffsetOfExprClass: 1046ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 10478ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor VisitOffsetOfExpr(cast<OffsetOfExpr>(S), Pred, Dst); 1048ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 10498ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 10508ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 1051f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case Stmt::UnaryExprOrTypeTraitExprClass: 1052ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1053f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne VisitUnaryExprOrTypeTraitExpr(cast<UnaryExprOrTypeTraitExpr>(S), 1054f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Pred, Dst); 1055ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 1056e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 10571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1058e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek case Stmt::StmtExprClass: { 10599c378f705405d37f49795d5e915989de774fe11fTed Kremenek const StmtExpr *SE = cast<StmtExpr>(S); 1060a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek 1061a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek if (SE->getSubStmt()->body_empty()) { 1062a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek // Empty statement expression. 1063a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek assert(SE->getType() == getContext().VoidTy 1064a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek && "Empty statement expression must have void type."); 1065a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek break; 1066a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 10671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10689c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (Expr *LastExpr = dyn_cast<Expr>(*SE->getSubStmt()->body_rbegin())) { 10698bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 1070ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(SE, Pred, 10715eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->BindExpr(SE, Pred->getLocationContext(), 10725eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->getSVal(LastExpr, 10735eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek Pred->getLocationContext()))); 1074a3d1eb85853eae7b719f679b40923826b5e4b7dfTed Kremenek } 1075e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek break; 1076e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek } 10776987c7b74146b9658b1925c5981f8b0cd0672b55Zhongxing Xu 107872374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek case Stmt::UnaryOperatorClass: { 1079ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 108003509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const UnaryOperator *U = cast<UnaryOperator>(S); 10810caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek if (AMgr.options.eagerlyAssumeBinOpBifurcation && (U->getOpcode() == UO_LNot)) { 1082031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNodeSet Tmp; 1083892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Tmp); 10840caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek evalEagerlyAssumeBinOpBifurcation(Dst, Tmp, U); 108572374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 108672374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek else 1087892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek VisitUnaryOperator(U, Pred, Dst); 1088ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 10891b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek break; 109072374594c5d9ade02451bc85cf9dfa5b0ea106e7Ted Kremenek } 10914b9c2d235fb9449e249d74f48ecfec601650de93John McCall 10924b9c2d235fb9449e249d74f48ecfec601650de93John McCall case Stmt::PseudoObjectExprClass: { 10934b9c2d235fb9449e249d74f48ecfec601650de93John McCall Bldr.takeNodes(Pred); 10948bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 10954b9c2d235fb9449e249d74f48ecfec601650de93John McCall const PseudoObjectExpr *PE = cast<PseudoObjectExpr>(S); 10964b9c2d235fb9449e249d74f48ecfec601650de93John McCall if (const Expr *Result = PE->getResultExpr()) { 10975eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal V = state->getSVal(Result, Pred->getLocationContext()); 10985eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek Bldr.generateNode(S, Pred, 10995eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->BindExpr(S, Pred->getLocationContext(), V)); 11004b9c2d235fb9449e249d74f48ecfec601650de93John McCall } 11014b9c2d235fb9449e249d74f48ecfec601650de93John McCall else 11025eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek Bldr.generateNode(S, Pred, 11035eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->BindExpr(S, Pred->getLocationContext(), 11045eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek UnknownVal())); 11054b9c2d235fb9449e249d74f48ecfec601650de93John McCall 11064b9c2d235fb9449e249d74f48ecfec601650de93John McCall Bldr.addNodes(Dst); 11074b9c2d235fb9449e249d74f48ecfec601650de93John McCall break; 11084b9c2d235fb9449e249d74f48ecfec601650de93John McCall } 11091b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 11101b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 11111b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 11125903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaksbool ExprEngine::replayWithoutInlining(ExplodedNode *N, 11135903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks const LocationContext *CalleeLC) { 11145903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks const StackFrameContext *CalleeSF = CalleeLC->getCurrentStackFrame(); 11155903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks const StackFrameContext *CallerSF = CalleeSF->getParent()->getCurrentStackFrame(); 11165903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks assert(CalleeSF && CallerSF); 11175903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks ExplodedNode *BeforeProcessingCall = 0; 111828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose const Stmt *CE = CalleeSF->getCallSite(); 11195903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 11205903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Find the first node before we started processing the call expression. 11215903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks while (N) { 11225903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks ProgramPoint L = N->getLocation(); 11235903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks BeforeProcessingCall = N; 11245903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks N = N->pred_empty() ? NULL : *(N->pred_begin()); 11255903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 11265903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Skip the nodes corresponding to the inlined code. 11275903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (L.getLocationContext()->getCurrentStackFrame() != CallerSF) 11285903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks continue; 11295903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // We reached the caller. Find the node right before we started 113028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // processing the call. 11310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (L.isPurgeKind()) 11325903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks continue; 11337a95de68c093991047ed8d339479ccad51b88663David Blaikie if (L.getAs<PreImplicitCall>()) 113428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose continue; 11357a95de68c093991047ed8d339479ccad51b88663David Blaikie if (L.getAs<CallEnter>()) 1136852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose continue; 11377a95de68c093991047ed8d339479ccad51b88663David Blaikie if (Optional<StmtPoint> SP = L.getAs<StmtPoint>()) 113828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose if (SP->getStmt() == CE) 11395903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks continue; 11405903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks break; 11415903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } 11425903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 1143253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks if (!BeforeProcessingCall) 11445903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return false; 11455903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 11465903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // TODO: Clean up the unneeded nodes. 11475903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 11485903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Build an Epsilon node from which we will restart the analyzes. 114928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // Note that CE is permitted to be NULL! 11505903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks ProgramPoint NewNodeLoc = 11515903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks EpsilonPoint(BeforeProcessingCall->getLocationContext(), CE); 11525903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Add the special flag to GDM to signal retrying with no inlining. 11535903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Note, changing the state ensures that we are not going to cache out. 11545903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks ProgramStateRef NewNodeState = BeforeProcessingCall->getState(); 115516303fcc569ea149dc2de38ff9e367d2d4831ceeDavid Greene NewNodeState = 115616303fcc569ea149dc2de38ff9e367d2d4831ceeDavid Greene NewNodeState->set<ReplayWithoutInlining>(const_cast<Stmt *>(CE)); 11575903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 11585903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Make the new node a successor of BeforeProcessingCall. 11595903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks bool IsNew = false; 11605903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks ExplodedNode *NewNode = G.getNode(NewNodeLoc, NewNodeState, false, &IsNew); 1161253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks // We cached out at this point. Caching out is common due to us backtracking 1162253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks // from the inlined function, which might spawn several paths. 1163253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks if (!IsNew) 1164253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks return true; 1165253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks 11665903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks NewNode->addPredecessor(BeforeProcessingCall, G); 11675903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 11685903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Add the new node to the work list. 11695903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks Engine.enqueueStmtNode(NewNode, CalleeSF->getCallSiteBlock(), 11705903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks CalleeSF->getIndex()); 11715903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks NumTimesRetriedWithoutInlining++; 11725903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return true; 11735903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks} 11745903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 1175c03a39e16762627b421247b12a2658be630a3300Anna Zaks/// Block entrance. (Update counters). 1176253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaksvoid ExprEngine::processCFGBlockEntrance(const BlockEdge &L, 1177b355be838a22a511d078504b2277f70aea52ca85Anna Zaks NodeBuilderWithSinks &nodeBuilder, 1178b355be838a22a511d078504b2277f70aea52ca85Anna Zaks ExplodedNode *Pred) { 117927c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek 118027c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek // FIXME: Refactor this into a checker. 11812fa9d72d4d23ccdcd4137946e5ebafac7a04f04cTed Kremenek if (nodeBuilder.getContext().blockCount() >= AMgr.options.maxBlockVisitOnPath) { 1182ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek static SimpleProgramPointTag tag("ExprEngine : Block count exceeded"); 1183253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks const ExplodedNode *Sink = 1184b355be838a22a511d078504b2277f70aea52ca85Anna Zaks nodeBuilder.generateSink(Pred->getState(), Pred, &tag); 1185749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks 1186749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks // Check if we stopped at the top level function or not. 1187749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks // Root node should have the location context of the top most function. 1188b355be838a22a511d078504b2277f70aea52ca85Anna Zaks const LocationContext *CalleeLC = Pred->getLocation().getLocationContext(); 11893bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks const LocationContext *CalleeSF = CalleeLC->getCurrentStackFrame(); 11905903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks const LocationContext *RootLC = 11915903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks (*G.roots_begin())->getLocation().getLocationContext(); 11923bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks if (RootLC->getCurrentStackFrame() != CalleeSF) { 1193e62f048960645b79363408fdead53fec2a063c52Anna Zaks Engine.FunctionSummaries->markReachedMaxBlockCount(CalleeSF->getDecl()); 11943bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks 11955903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // Re-run the call evaluation without inlining it, by storing the 11965903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // no-inlining policy in the state and enqueuing the new work item on 11975903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // the list. Replay should almost never fail. Use the stats to catch it 11985903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks // if it does. 1199255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if ((!AMgr.options.NoRetryExhausted && 1200b355be838a22a511d078504b2277f70aea52ca85Anna Zaks replayWithoutInlining(Pred, CalleeLC))) 1201253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks return; 1202253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks NumMaxBlockCountReachedInInlined++; 12035903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } else 1204749bbe6f5f23676244f12a0d41511c8e73516febAnna Zaks NumMaxBlockCountReached++; 1205253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks 1206253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks // Make sink nodes as exhausted(for stats) only if retry failed. 1207253955ca25c7e7049963b5db613c0cd15d66e4f8Anna Zaks Engine.blocksExhausted.push_back(std::make_pair(L, Sink)); 120827c54e57c4a012dcdf2b40cf985b70d0b9caa69eTed Kremenek } 1209e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek} 1210e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 1211e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1212e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek// Branch processing. 1213e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1214e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek 12156ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// RecoverCastedSymbol - A helper function for ProcessBranch that is used 12166ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// to try to recover some path-sensitivity for casts of symbolic 12176ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// integers that promote their values (which are currently not tracked well). 12186ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek/// This function returns the SVal bound to Condition->IgnoreCasts if all the 12196ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek// cast(s) did was sign-extend the original value. 1220294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekstatic SVal RecoverCastedSymbol(ProgramStateManager& StateMgr, 12218bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state, 1222294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *Condition, 12235eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx, 1224294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ASTContext &Ctx) { 12256ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 122603509aea098772644bf4662dc1c88634818ceeccZhongxing Xu const Expr *Ex = dyn_cast<Expr>(Condition); 12276ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!Ex) 12286ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 12296ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 12306ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t bits = 0; 12316ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bool bitsInit = false; 12321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 123303509aea098772644bf4662dc1c88634818ceeccZhongxing Xu while (const CastExpr *CE = dyn_cast<CastExpr>(Ex)) { 12346ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = CE->getType(); 12356ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 12366ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!T->isIntegerType()) 12376ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 12381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12396ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek uint64_t newBits = Ctx.getTypeSize(T); 12406ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || newBits < bits) { 12416ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bitsInit = true; 12426ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek bits = newBits; 12436ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 12441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12456ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek Ex = CE->getSubExpr(); 12466ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek } 12476ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 12486ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek // We reached a non-cast. Is it a symbolic value? 12496ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek QualType T = Ex->getType(); 12506ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 12516ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek if (!bitsInit || !T->isIntegerType() || Ctx.getTypeSize(T) > bits) 12526ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek return UnknownVal(); 12531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12545eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek return state->getSVal(Ex, LCtx); 12556ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek} 12566ae8a3600656c478d27f25639bed765f4fe71732Ted Kremenek 12573f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenekstatic const Stmt *ResolveCondition(const Stmt *Condition, 12583f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek const CFGBlock *B) { 12593f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek if (const Expr *Ex = dyn_cast<Expr>(Condition)) 12603f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek Condition = Ex->IgnoreParens(); 12613f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 12623f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek const BinaryOperator *BO = dyn_cast<BinaryOperator>(Condition); 12633f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek if (!BO || !BO->isLogicalOp()) 12643f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek return Condition; 12653f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 12663f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // For logical operations, we still have the case where some branches 12673f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // use the traditional "merge" approach and others sink the branch 12683f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // directly into the basic blocks representing the logical operation. 12693f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // We need to distinguish between those two cases here. 12703f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 12713f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // The invariants are still shifting, but it is possible that the 12723f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // last element in a CFGBlock is not a CFGStmt. Look for the last 12733f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // CFGStmt as the value of the condition. 12743f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek CFGBlock::const_reverse_iterator I = B->rbegin(), E = B->rend(); 12753f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek for (; I != E; ++I) { 12763f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek CFGElement Elem = *I; 1277b07805485c603be3d8011f72611465324c9e664bDavid Blaikie Optional<CFGStmt> CS = Elem.getAs<CFGStmt>(); 12783f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek if (!CS) 12793f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek continue; 1280b07805485c603be3d8011f72611465324c9e664bDavid Blaikie if (CS->getStmt() != Condition) 12813f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek break; 12823f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek return Condition; 12833f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek } 12843f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 12853f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek assert(I != E); 12863f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 12873f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek while (Condition) { 12883f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek BO = dyn_cast<BinaryOperator>(Condition); 12893f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek if (!BO || !BO->isLogicalOp()) 12903f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek return Condition; 12913f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek Condition = BO->getRHS()->IgnoreParens(); 12923f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek } 12933f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek llvm_unreachable("could not resolve condition"); 12943f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek} 12953f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 12969c378f705405d37f49795d5e915989de774fe11fTed Kremenekvoid ExprEngine::processBranch(const Stmt *Condition, const Stmt *Term, 1297a19f4af7a94835ce4693bfe12d6270754e79eb56Anna Zaks NodeBuilderContext& BldCtx, 1298ad62deeb70e97da6bd514dd390ea1ce6af6ad81dAnna Zaks ExplodedNode *Pred, 12991aae01a8308d2f8e31adab3f4d7ac35543aac680Anna Zaks ExplodedNodeSet &Dst, 1300a19f4af7a94835ce4693bfe12d6270754e79eb56Anna Zaks const CFGBlock *DstT, 1301a19f4af7a94835ce4693bfe12d6270754e79eb56Anna Zaks const CFGBlock *DstF) { 130266c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = &BldCtx; 1303f236b6503a4dbc44c1fccb8756bd57c9d0efdf05Anna Zaks 1304b2331834a0515c80862ee51325c758a053829f15Ted Kremenek // Check for NULL conditions; e.g. "for(;;)" 13051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Condition) { 13061aae01a8308d2f8e31adab3f4d7ac35543aac680Anna Zaks BranchNodeBuilder NullCondBldr(Pred, Dst, BldCtx, DstT, DstF); 1307a19f4af7a94835ce4693bfe12d6270754e79eb56Anna Zaks NullCondBldr.markInfeasible(false); 13084e82d3cf6fd4c907265e3fa3aac0a835c35dc759Anna Zaks NullCondBldr.generateNode(Pred->getState(), true, Pred); 1309b2331834a0515c80862ee51325c758a053829f15Ted Kremenek return; 1310b2331834a0515c80862ee51325c758a053829f15Ted Kremenek } 13111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13123f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 13133f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek // Resolve the condition in the precense of nested '||' and '&&'. 13143f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek if (const Expr *Ex = dyn_cast<Expr>(Condition)) 13153f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek Condition = Ex->IgnoreParens(); 13163f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 13173f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek Condition = ResolveCondition(Condition, BldCtx.getBlock()); 131821028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek PrettyStackTraceLoc CrashInfo(getContext().getSourceManager(), 131921028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek Condition->getLocStart(), 132021028dd8850c64a414f7a82dfddcc291351203d6Ted Kremenek "Error evaluating branch"); 13210fb0bc4067d6c9d7c0e655300ef309b05d3adfc9Ted Kremenek 1322f236b6503a4dbc44c1fccb8756bd57c9d0efdf05Anna Zaks ExplodedNodeSet CheckersOutSet; 1323f236b6503a4dbc44c1fccb8756bd57c9d0efdf05Anna Zaks getCheckerManager().runCheckersForBranchCondition(Condition, CheckersOutSet, 13244e82d3cf6fd4c907265e3fa3aac0a835c35dc759Anna Zaks Pred, *this); 13258ff5c41f2bde7ebbe568b4c15e59f14b8befae66Anna Zaks // We generated only sinks. 1326f236b6503a4dbc44c1fccb8756bd57c9d0efdf05Anna Zaks if (CheckersOutSet.empty()) 13278ff5c41f2bde7ebbe568b4c15e59f14b8befae66Anna Zaks return; 13281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1329f236b6503a4dbc44c1fccb8756bd57c9d0efdf05Anna Zaks BranchNodeBuilder builder(CheckersOutSet, Dst, BldCtx, DstT, DstF); 1330f236b6503a4dbc44c1fccb8756bd57c9d0efdf05Anna Zaks for (NodeBuilder::iterator I = CheckersOutSet.begin(), 1331f236b6503a4dbc44c1fccb8756bd57c9d0efdf05Anna Zaks E = CheckersOutSet.end(); E != I; ++I) { 1332cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks ExplodedNode *PredI = *I; 1333cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks 1334cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks if (PredI->isSink()) 1335cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks continue; 1336cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks 133712b3e3199c530b72f3cc44dd24a1e20ed6086292Anna Zaks ProgramStateRef PrevState = PredI->getState(); 133812b3e3199c530b72f3cc44dd24a1e20ed6086292Anna Zaks SVal X = PrevState->getSVal(Condition, PredI->getLocationContext()); 1339cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks 1340cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks if (X.isUnknownOrUndef()) { 1341cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks // Give it a chance to recover from unknown. 1342cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks if (const Expr *Ex = dyn_cast<Expr>(Condition)) { 1343cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks if (Ex->getType()->isIntegerType()) { 1344cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks // Try to recover some path-sensitivity. Right now casts of symbolic 1345cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks // integers that promote their values are currently not tracked well. 1346cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks // If 'Condition' is such an expression, try and recover the 1347cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks // underlying value and use that instead. 1348cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks SVal recovered = RecoverCastedSymbol(getStateManager(), 1349cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks PrevState, Condition, 135012b3e3199c530b72f3cc44dd24a1e20ed6086292Anna Zaks PredI->getLocationContext(), 1351cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks getContext()); 1352cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks 1353cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks if (!recovered.isUnknown()) { 1354cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks X = recovered; 1355cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks } 13560835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 1357b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 13580835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu } 13595eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek 13600835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu // If the condition is still unknown, give up. 136173c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (X.isUnknownOrUndef()) { 1362829846b5002d7f8d6a54b9c58c3ecf7cac56d2ccTed Kremenek builder.generateNode(PrevState, true, PredI); 1363829846b5002d7f8d6a54b9c58c3ecf7cac56d2ccTed Kremenek builder.generateNode(PrevState, false, PredI); 1364cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks continue; 13651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 13661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13675251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie DefinedSVal V = X.castAs<DefinedSVal>(); 13680835e4cccfef3ea5346962722b79484f6b3ca602Zhongxing Xu 13696960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose ProgramStateRef StTrue, StFalse; 13706960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose tie(StTrue, StFalse) = PrevState->assume(V); 13716960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose 1372cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks // Process the true branch. 1373cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks if (builder.isFeasible(true)) { 13746960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose if (StTrue) 13756960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose builder.generateNode(StTrue, true, PredI); 1376cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks else 1377cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks builder.markInfeasible(true); 1378cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks } 13791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1380cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks // Process the false branch. 1381cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks if (builder.isFeasible(false)) { 13826960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose if (StFalse) 13836960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose builder.generateNode(StFalse, false, PredI); 1384cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks else 1385cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks builder.markInfeasible(false); 1386cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks } 1387cd656cab3fa3dd4b0c974c6ae1c0e60880b18c22Anna Zaks } 138866c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = 0; 1389f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek} 1390f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 13910f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek/// The GDM component containing the set of global variables which have been 13920f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek/// previously initialized with explicit initializers. 13930f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted KremenekREGISTER_TRAIT_WITH_PROGRAMSTATE(InitializedGlobalsSet, 13940f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek llvm::ImmutableSet<const VarDecl *>) 13950f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek 13960f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenekvoid ExprEngine::processStaticInitializer(const DeclStmt *DS, 13970f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek NodeBuilderContext &BuilderCtx, 13980f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek ExplodedNode *Pred, 13990f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek clang::ento::ExplodedNodeSet &Dst, 14000f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek const CFGBlock *DstT, 14010f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek const CFGBlock *DstF) { 14020f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek currBldrCtx = &BuilderCtx; 14030f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek 14040f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek const VarDecl *VD = cast<VarDecl>(DS->getSingleDecl()); 14050f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek ProgramStateRef state = Pred->getState(); 14060f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek bool initHasRun = state->contains<InitializedGlobalsSet>(VD); 14070f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek BranchNodeBuilder builder(Pred, Dst, BuilderCtx, DstT, DstF); 14080f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek 14090f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek if (!initHasRun) { 14100f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek state = state->add<InitializedGlobalsSet>(VD); 14110f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek } 14120f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek 14130f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek builder.generateNode(state, initHasRun, Pred); 14140f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek builder.markInfeasible(!initHasRun); 14150f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek 14160f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek currBldrCtx = 0; 14170f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek} 14180f5c5c60e9806d13f0907cd99d7204ffab0e08f7Ted Kremenek 1419e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenek/// processIndirectGoto - Called by CoreEngine. Used to generate successor 1420754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek/// nodes by processing the 'effects' of a computed goto jump. 1421ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattnervoid ExprEngine::processIndirectGoto(IndirectGotoNodeBuilder &builder) { 1422754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 14238bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = builder.getState(); 14245eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal V = state->getSVal(builder.getTarget(), builder.getLocationContext()); 14251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1426754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Three possibilities: 1427754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 1428754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (1) We know the computed label. 14294a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek // (2) The label is NULL (or some other constant), or Undefined. 1430754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // (3) We have no clue about the label. Dispatch to all targets. 1431754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // 14321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1433d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef IndirectGotoNodeBuilder::iterator iterator; 1434754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 1435dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<loc::GotoLabel> LV = V.getAs<loc::GotoLabel>()) { 14365251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie const LabelDecl *L = LV->getLabel(); 14371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1438ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner for (iterator I = builder.begin(), E = builder.end(); I != E; ++I) { 143924f1a967741ff9f8025ee23be12ba6feacc31f77Ted Kremenek if (I.getLabel() == L) { 1440a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 1441754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1442754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 1443754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 14441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1445b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("No block with label."); 1446754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 1447754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek 14485251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie if (V.getAs<loc::ConcreteInt>() || V.getAs<UndefinedVal>()) { 1449754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // Dispatch to the first target and mark it as a sink. 14502055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateNode(builder.begin(), state, true); 14512055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // FIXME: add checker visit. 14522055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu // UndefBranches.insert(N); 1453754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek return; 1454754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek } 14551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1456754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek // This is really a catch-all. We don't support symbolics yet. 1457b3cfd58c9b13325d994e5f9b5065e6a22d91911dTed Kremenek // FIXME: Implement dispatch for symbolic pointers. 14581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1459754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek for (iterator I=builder.begin(), E=builder.end(); I != E; ++I) 1460a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek builder.generateNode(I, state); 1461754607e7cff2d902d9af8b771409449fb2f8d2bfTed Kremenek} 1462f233d48cfc513b045e2c2cfca5c175220fbd0a82Ted Kremenek 1463d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessEndPath - Called by CoreEngine. Used to generate end-of-path 146473099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek/// nodes when the control reaches the end of a function. 1465b355be838a22a511d078504b2277f70aea52ca85Anna Zaksvoid ExprEngine::processEndOfFunction(NodeBuilderContext& BC, 1466b355be838a22a511d078504b2277f70aea52ca85Anna Zaks ExplodedNode *Pred) { 1467b355be838a22a511d078504b2277f70aea52ca85Anna Zaks StateMgr.EndPath(Pred->getState()); 14688501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks 1469af498a28797c075c48d7e943df5f5a8e78ed8eb0Anna Zaks ExplodedNodeSet Dst; 14708501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks if (Pred->getLocationContext()->inTopFrame()) { 14718501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks // Remove dead symbols. 14728501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks ExplodedNodeSet AfterRemovedDead; 14738501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks removeDeadOnEndOfFunction(BC, Pred, AfterRemovedDead); 14748501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks 14758501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks // Notify checkers. 14768501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks for (ExplodedNodeSet::iterator I = AfterRemovedDead.begin(), 14778501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks E = AfterRemovedDead.end(); I != E; ++I) { 1478344c77aac25e5d960aced3f45fbaa09853383f6dAnna Zaks getCheckerManager().runCheckersForEndFunction(BC, Dst, *I, *this); 14798501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks } 14808501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks } else { 1481344c77aac25e5d960aced3f45fbaa09853383f6dAnna Zaks getCheckerManager().runCheckersForEndFunction(BC, Dst, Pred, *this); 14828501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks } 14838501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks 14844d2ae4a70336dc2aa11389b34946be152bb454c9Anna Zaks Engine.enqueueEndOfFunction(Dst); 148573099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek} 148673099bfea9f5d4ec05265170bbefec3d76fb6b5eTed Kremenek 1487d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis/// ProcessSwitch - Called by CoreEngine. Used to generate successor 1488daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek/// nodes by processing the 'effects' of a switch statement. 1489e36de1fe51c39d9161915dd3dbef880954af6476Ted Kremenekvoid ExprEngine::processSwitch(SwitchNodeBuilder& builder) { 1490d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis typedef SwitchNodeBuilder::iterator iterator; 14918bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = builder.getState(); 14929c378f705405d37f49795d5e915989de774fe11fTed Kremenek const Expr *CondE = builder.getCondition(); 14935eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal CondV_untested = state->getSVal(CondE, builder.getLocationContext()); 1494daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 14955b9bd2137ebef350af803c634e3fdf5d74678100Ted Kremenek if (CondV_untested.isUndef()) { 14962055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //ExplodedNode* N = builder.generateDefaultCaseNode(state, true); 1497b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek // FIXME: add checker 14982055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu //UndefBranches.insert(N); 14992055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu 1500daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1501daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 15025251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie DefinedOrUnknownSVal CondV = CondV_untested.castAs<DefinedOrUnknownSVal>(); 1503692416c214a3b234236dedcf875735a9cc29e90bTed Kremenek 15048bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef DefaultSt = state; 150534feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek 150634feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek iterator I = builder.begin(), EI = builder.end(); 150734feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek bool defaultIsFeasible = I == EI; 15081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 150934feff654c6304e0a59ceb1376989d28dbc956ffTed Kremenek for ( ; I != EI; ++I) { 1510e71f3d587844110d836c82250830b27b1651afdbTed Kremenek // Successor may be pruned out during CFG construction. 1511e71f3d587844110d836c82250830b27b1651afdbTed Kremenek if (!I.getBlock()) 1512e71f3d587844110d836c82250830b27b1651afdbTed Kremenek continue; 1513e71f3d587844110d836c82250830b27b1651afdbTed Kremenek 15149c378f705405d37f49795d5e915989de774fe11fTed Kremenek const CaseStmt *Case = I.getCase(); 151572afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek 151672afb3739da0da02158242ae41a50cfe0bea78b4Ted Kremenek // Evaluate the LHS of the case value. 151785df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith llvm::APSInt V1 = Case->getLHS()->EvaluateKnownConstInt(getContext()); 151885df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith assert(V1.getBitWidth() == getContext().getTypeSize(CondE->getType())); 15191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1520daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Get the RHS of the case, if it exists. 152185df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith llvm::APSInt V2; 152285df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith if (const Expr *E = Case->getRHS()) 152385df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith V2 = E->EvaluateKnownConstInt(getContext()); 152414a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek else 152514a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek V2 = V1; 15261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1527daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // FIXME: Eventually we should replace the logic below with a range 1528daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // comparison, rather than concretize the values within the range. 1529aa1c4e5a6b87b62d991c55a0d4522bcd778068d7Ted Kremenek // This should be easy once we have "ranges" for NonLVals. 15301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 153114a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek do { 153285df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith nonloc::ConcreteInt CaseVal(getBasicVals().getValue(V1)); 15339c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek DefinedOrUnknownSVal Res = svalBuilder.evalEQ(DefaultSt ? DefaultSt : state, 153448569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek CondV, CaseVal); 1535b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 15361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Now "assume" that the case matches. 15378bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek if (ProgramStateRef stateNew = state->assume(Res, true)) { 1538a591bc04d21fa62ebffcb2c7814d738ca8f5e2f9Ted Kremenek builder.generateCaseStmtNode(I, stateNew); 15391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1540daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // If CondV evaluates to a constant, then we know that this 1541daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // is the *only* case that we can take, so stop evaluating the 1542daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // others. 15435251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie if (CondV.getAs<nonloc::ConcreteInt>()) 1544daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek return; 1545daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 15461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1547daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // Now "assume" that the case doesn't match. Add this state 1548daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek // to the default state (if it is feasible). 154948569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek if (DefaultSt) { 15508bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek if (ProgramStateRef stateNew = DefaultSt->assume(Res, false)) { 155148569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = true; 155248569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = stateNew; 155348569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 155448569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek else { 155548569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek defaultIsFeasible = false; 155648569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek DefaultSt = NULL; 155748569f9562740ac1f4b175cb17ce3d49035402c4Ted Kremenek } 15585014ab113eb211b8320ae30b173d7020352663c6Ted Kremenek } 1559b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 156014a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek // Concretize the next value in the range. 156185df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith if (V1 == V2) 156214a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek break; 15631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 156485df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith ++V1; 156585df96c1f04867e26ba069aa0cc6a4cd6a01292eRichard Smith assert (V1 <= V2); 15661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 156714a1140c9f4e20b12a54db8745b74699b9872cd2Ted Kremenek } while (true); 1568daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 15691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15704d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (!defaultIsFeasible) 15714d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 15724d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 15734d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // If we have switch(enum value), the default branch is not 15744d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible if all of the enum constants not covered by 'case:' statements 15754d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // are not feasible values for the switch condition. 15764d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // 15774d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // Note that this isn't as accurate as it could be. Even if there isn't 15784d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // a case for a particular enum value as long as that enum value isn't 15794d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek // feasible then it shouldn't be considered for making 'default:' reachable. 15804d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const SwitchStmt *SS = builder.getSwitch(); 15814d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek const Expr *CondExpr = SS->getCond()->IgnoreParenImpCasts(); 15824d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (CondExpr->getType()->getAs<EnumType>()) { 15834d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek if (SS->isAllEnumCasesCovered()) 15844d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek return; 15854d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek } 15864d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek 15874d3175c1e5a44251ea97b0c81e80f060629d9c08Ted Kremenek builder.generateDefaultCaseNode(DefaultSt); 1588daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek} 1589daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek 1590e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1591ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek// Transfer functions: Loads and stores. 1592e695e1cd7d8a579455e8969be36cbaf10a316a64Ted Kremenek//===----------------------------------------------------------------------===// 1593d27f8169f4b68337a489547a41ac45bf7a5d1ddfTed Kremenek 1594d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::VisitCommonDeclRefExpr(const Expr *Ex, const NamedDecl *D, 1595d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNode *Pred, 1596d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis ExplodedNodeSet &Dst) { 159766c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, Dst, *currBldrCtx); 1598ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 15998bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 16005eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = Pred->getLocationContext(); 16016d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 16029c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 1603591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks assert(Ex->isGLValue()); 1604d17da2b99f323fa91b01e1dd119cc32e0ee8197dTed Kremenek SVal V = state->getLValue(VD, Pred->getLocationContext()); 1605a7581731b1453b51b26154d2409d42a5b6395079Zhongxing Xu 1606892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // For references, the 'lvalue' is the pointer address stored in the 1607892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek // reference region. 1608892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (VD->getType()->isReferenceType()) { 1609892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek if (const MemRegion *R = V.getAsRegion()) 1610892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = state->getSVal(R); 1611892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek else 1612892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek V = UnknownVal(); 1613852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 16146d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu 1615fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(Ex, Pred, state->BindExpr(Ex, LCtx, V), 0, 1616ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks ProgramPoint::PostLValueKind); 1617852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1618892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 16199c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (const EnumConstantDecl *ED = dyn_cast<EnumConstantDecl>(D)) { 1620591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks assert(!Ex->isGLValue()); 1621c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.makeIntVal(ED->getInitVal()); 16225eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek Bldr.generateNode(Ex, Pred, state->BindExpr(Ex, LCtx, V)); 16236d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 1624892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek } 16259c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 1626c8413fd03f73084a5c93028f8b4db619fc388087Ted Kremenek SVal V = svalBuilder.getFunctionPointer(FD); 1627fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(Ex, Pred, state->BindExpr(Ex, LCtx, V), 0, 1628ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks ProgramPoint::PostLValueKind); 16296d69b5d82281992e981caa9bc038e3f6cac6594aZhongxing Xu return; 16301b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 16315aac0b6ae95f137b1783f3e6227241fb457b8f8bTed Kremenek if (isa<FieldDecl>(D)) { 1632fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose // FIXME: Compute lvalue of field pointers-to-member. 16330156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose // Right now we just use a non-null void pointer, so that it gives proper 16340156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose // results in boolean contexts. 16350156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose SVal V = svalBuilder.conjureSymbolVal(Ex, LCtx, getContext().VoidPtrTy, 16360156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose currBldrCtx->blockCount()); 16375251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie state = state->assume(V.castAs<DefinedOrUnknownSVal>(), true); 16380156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose Bldr.generateNode(Ex, Pred, state->BindExpr(Ex, LCtx, V), 0, 1639fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose ProgramPoint::PostLValueKind); 16405aac0b6ae95f137b1783f3e6227241fb457b8f8bTed Kremenek return; 16415aac0b6ae95f137b1783f3e6227241fb457b8f8bTed Kremenek } 16425aac0b6ae95f137b1783f3e6227241fb457b8f8bTed Kremenek 1643fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose llvm_unreachable("Support for this Decl not implemented."); 16443271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek} 16453271f8d315712885ac87747369bb1d9f4b1ea81fTed Kremenek 1646540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek/// VisitArraySubscriptExpr - Transfer function for array accesses 16479c378f705405d37f49795d5e915989de774fe11fTed Kremenekvoid ExprEngine::VisitLvalArraySubscriptExpr(const ArraySubscriptExpr *A, 16489c378f705405d37f49795d5e915989de774fe11fTed Kremenek ExplodedNode *Pred, 16499c378f705405d37f49795d5e915989de774fe11fTed Kremenek ExplodedNodeSet &Dst){ 16501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16519c378f705405d37f49795d5e915989de774fe11fTed Kremenek const Expr *Base = A->getBase()->IgnoreParens(); 16529c378f705405d37f49795d5e915989de774fe11fTed Kremenek const Expr *Idx = A->getIdx()->IgnoreParens(); 1653892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek 16541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16558f3407ef22bc7efe6ca4169381e09d0d657ec192Ted Kremenek ExplodedNodeSet checkerPreStmt; 16568f3407ef22bc7efe6ca4169381e09d0d657ec192Ted Kremenek getCheckerManager().runCheckersForPreStmt(checkerPreStmt, Pred, A, *this); 16578f3407ef22bc7efe6ca4169381e09d0d657ec192Ted Kremenek 165866c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(checkerPreStmt, Dst, *currBldrCtx); 1659ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 16608f3407ef22bc7efe6ca4169381e09d0d657ec192Ted Kremenek for (ExplodedNodeSet::iterator it = checkerPreStmt.begin(), 16618f3407ef22bc7efe6ca4169381e09d0d657ec192Ted Kremenek ei = checkerPreStmt.end(); it != ei; ++it) { 16625eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = (*it)->getLocationContext(); 16638bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = (*it)->getState(); 16645eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal V = state->getLValue(A->getType(), 16655eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->getSVal(Idx, LCtx), 16665eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->getSVal(Base, LCtx)); 1667591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks assert(A->isGLValue()); 1668fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(A, *it, state->BindExpr(A, LCtx, V), 0, 1669fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose ProgramPoint::PostLValueKind); 16701b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek } 1671540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek} 1672540cbe2b60294fe7b926c26b4f1840f544fe3011Ted Kremenek 1673469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek/// VisitMemberExpr - Transfer function for member expressions. 16749c378f705405d37f49795d5e915989de774fe11fTed Kremenekvoid ExprEngine::VisitMemberExpr(const MemberExpr *M, ExplodedNode *Pred, 16756889679d72859960e0fc8d1080487f63c4df1e0aAnna Zaks ExplodedNodeSet &TopDst) { 16761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 167766c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, TopDst, *currBldrCtx); 16786889679d72859960e0fc8d1080487f63c4df1e0aAnna Zaks ExplodedNodeSet Dst; 1679603513d2294c437b37bcf47f326b686e31bd9e84Jordan Rose ValueDecl *Member = M->getMemberDecl(); 168010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek 1681603513d2294c437b37bcf47f326b686e31bd9e84Jordan Rose // Handle static member variables and enum constants accessed via 1682603513d2294c437b37bcf47f326b686e31bd9e84Jordan Rose // member syntax. 1683603513d2294c437b37bcf47f326b686e31bd9e84Jordan Rose if (isa<VarDecl>(Member) || isa<EnumConstantDecl>(Member)) { 1684ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1685603513d2294c437b37bcf47f326b686e31bd9e84Jordan Rose VisitCommonDeclRefExpr(M, Member, Pred, Dst); 1686ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 16875bd04952d4ae7ca894f583583208f0cec4735a90Ted Kremenek return; 16885bd04952d4ae7ca894f583583208f0cec4735a90Ted Kremenek } 168910f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek 1690f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose ProgramStateRef state = Pred->getState(); 1691f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 1692f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose Expr *BaseExpr = M->getBase(); 1693f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose 169410f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek // Handle C++ method calls. 1695603513d2294c437b37bcf47f326b686e31bd9e84Jordan Rose if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Member)) { 1696f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose if (MD->isInstance()) 1697f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose state = createTemporaryRegionIfNeeded(state, LCtx, BaseExpr); 169810f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek 1699f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose SVal MDVal = svalBuilder.getFunctionPointer(MD); 1700f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose state = state->BindExpr(M, LCtx, MDVal); 170120aa40342bd74895128860c081aa84cd85bfa68dJordan Rose 1702f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose Bldr.generateNode(M, Pred, state); 1703ce6644bc1e921833f9b3c10cf7d4a0b78e8d5dc9Jordan Rose return; 170420aa40342bd74895128860c081aa84cd85bfa68dJordan Rose } 170520aa40342bd74895128860c081aa84cd85bfa68dJordan Rose 1706f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose // Handle regular struct fields / member variables. 1707f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose state = createTemporaryRegionIfNeeded(state, LCtx, BaseExpr); 1708f1e67d75fc922ff905de9faa6326bb1a96685ec1Jordan Rose SVal baseExprVal = state->getSVal(BaseExpr, LCtx); 1709d27a368f4800b447b970b7c438d0fb4da00838dcJordan Rose 1710603513d2294c437b37bcf47f326b686e31bd9e84Jordan Rose FieldDecl *field = cast<FieldDecl>(Member); 1711e3939d7446959afb6b650fe08e952d0f64ab6794Ted Kremenek SVal L = state->getLValue(field, baseExprVal); 17126b4be2ef4ce49717ff972434975ce3c34c9a1c4cJordan Rose if (M->isGLValue()) { 17136b4be2ef4ce49717ff972434975ce3c34c9a1c4cJordan Rose if (field->getType()->isReferenceType()) { 1714d27a368f4800b447b970b7c438d0fb4da00838dcJordan Rose if (const MemRegion *R = L.getAsRegion()) 1715d27a368f4800b447b970b7c438d0fb4da00838dcJordan Rose L = state->getSVal(R); 1716d27a368f4800b447b970b7c438d0fb4da00838dcJordan Rose else 17176b4be2ef4ce49717ff972434975ce3c34c9a1c4cJordan Rose L = UnknownVal(); 17186b4be2ef4ce49717ff972434975ce3c34c9a1c4cJordan Rose } 17196b4be2ef4ce49717ff972434975ce3c34c9a1c4cJordan Rose 1720d27a368f4800b447b970b7c438d0fb4da00838dcJordan Rose Bldr.generateNode(M, Pred, state->BindExpr(M, LCtx, L), 0, 1721d27a368f4800b447b970b7c438d0fb4da00838dcJordan Rose ProgramPoint::PostLValueKind); 17226b4be2ef4ce49717ff972434975ce3c34c9a1c4cJordan Rose } else { 1723ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.takeNodes(Pred); 1724bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLoad(Dst, M, M, Pred, state, L); 1725ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Dst); 1726ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks } 1727469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek} 1728469ecbded3616416ef938ed94a67f86149faf226Ted Kremenek 1729bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaksnamespace { 1730bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaksclass CollectReachableSymbolsCallback : public SymbolVisitor { 1731bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks InvalidatedSymbols Symbols; 1732bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zakspublic: 1733bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks CollectReachableSymbolsCallback(ProgramStateRef State) {} 1734bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks const InvalidatedSymbols &getSymbols() const { return Symbols; } 1735bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1736bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks bool VisitSymbol(SymbolRef Sym) { 1737bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks Symbols.insert(Sym); 1738bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks return true; 1739bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks } 1740bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks}; 1741bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks} // end anonymous namespace 1742bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 17431655bcd052a67a3050fc55df8ecce57342352e68Anna Zaks// A value escapes in three possible cases: 17441655bcd052a67a3050fc55df8ecce57342352e68Anna Zaks// (1) We are binding to something that is not a memory region. 17451655bcd052a67a3050fc55df8ecce57342352e68Anna Zaks// (2) We are binding to a MemrRegion that does not have stack storage. 17461655bcd052a67a3050fc55df8ecce57342352e68Anna Zaks// (3) We are binding to a MemRegion with stack storage that the store 17471655bcd052a67a3050fc55df8ecce57342352e68Anna Zaks// does not understand. 1748bf53dfac8195835028bd6347433f7dbebcc29fc1Anna ZaksProgramStateRef ExprEngine::processPointerEscapedOnBind(ProgramStateRef State, 17491655bcd052a67a3050fc55df8ecce57342352e68Anna Zaks SVal Loc, SVal Val) { 1750bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // Are we storing to something that causes the value to "escape"? 1751bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks bool escapes = true; 1752bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1753bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // TODO: Move to StoreManager. 1754dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<loc::MemRegionVal> regionLoc = Loc.getAs<loc::MemRegionVal>()) { 1755bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks escapes = !regionLoc->getRegion()->hasStackStorage(); 1756bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1757bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (!escapes) { 1758bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // To test (3), generate a new state with the binding added. If it is 1759bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // the same state, then it escapes (since the store cannot represent 1760bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // the binding). 1761bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // Do this only if we know that the store is not supposed to generate the 1762bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // same state. 1763bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks SVal StoredVal = State->getSVal(regionLoc->getRegion()); 1764bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (StoredVal != Val) 1765bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks escapes = (State == (State->bindLoc(*regionLoc, Val))); 1766bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks } 1767bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks } 1768bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1769bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // If our store can represent the binding and we aren't storing to something 1770bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // that doesn't have local storage then just return and have the simulation 1771bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // state continue as is. 1772bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (!escapes) 1773bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks return State; 1774bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1775bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // Otherwise, find all symbols referenced by 'val' that we are tracking 1776bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // and stop tracking them. 1777bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks CollectReachableSymbolsCallback Scanner = 1778bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks State->scanReachableSymbols<CollectReachableSymbolsCallback>(Val); 1779bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks const InvalidatedSymbols &EscapedSymbols = Scanner.getSymbols(); 1780bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks State = getCheckerManager().runCheckersForPointerEscape(State, 1781bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks EscapedSymbols, 1782233e26acc0ff2a1098f4c813f69286fce840a422Anna Zaks /*CallEvent*/ 0, 1783233e26acc0ff2a1098f4c813f69286fce840a422Anna Zaks PSK_EscapeOnBind); 1784bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1785bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks return State; 1786bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks} 1787bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1788bf53dfac8195835028bd6347433f7dbebcc29fc1Anna ZaksProgramStateRef 178941988f331a74a72cf243a2a68ffb56418e9a174eAnna ZaksExprEngine::notifyCheckersOfPointerEscape(ProgramStateRef State, 1790bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks const InvalidatedSymbols *Invalidated, 1791bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks ArrayRef<const MemRegion *> ExplicitRegions, 1792bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks ArrayRef<const MemRegion *> Regions, 179341988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks const CallEvent *Call, 179441988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks bool IsConst) { 1795bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1796bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (!Invalidated || Invalidated->empty()) 1797bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks return State; 1798bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1799bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (!Call) 1800bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks return getCheckerManager().runCheckersForPointerEscape(State, 1801233e26acc0ff2a1098f4c813f69286fce840a422Anna Zaks *Invalidated, 1802233e26acc0ff2a1098f4c813f69286fce840a422Anna Zaks 0, 1803233e26acc0ff2a1098f4c813f69286fce840a422Anna Zaks PSK_EscapeOther); 180441988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks 180541988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks // Note: Due to current limitations of RegionStore, we only process the top 180641988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks // level const pointers correctly. The lower level const pointers are 180741988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks // currently treated as non-const. 180841988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks if (IsConst) 180941988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks return getCheckerManager().runCheckersForPointerEscape(State, 181041988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks *Invalidated, 181141988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks Call, 181241988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks PSK_DirectEscapeOnCall, 181341988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks true); 181441988f331a74a72cf243a2a68ffb56418e9a174eAnna Zaks 1815bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // If the symbols were invalidated by a call, we want to find out which ones 1816bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // were invalidated directly due to being arguments to the call. 1817bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks InvalidatedSymbols SymbolsDirectlyInvalidated; 1818bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks for (ArrayRef<const MemRegion *>::iterator I = ExplicitRegions.begin(), 1819bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks E = ExplicitRegions.end(); I != E; ++I) { 1820bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (const SymbolicRegion *R = (*I)->StripCasts()->getAs<SymbolicRegion>()) 1821bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks SymbolsDirectlyInvalidated.insert(R->getSymbol()); 1822bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks } 1823bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1824bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks InvalidatedSymbols SymbolsIndirectlyInvalidated; 1825bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks for (InvalidatedSymbols::const_iterator I=Invalidated->begin(), 1826bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks E = Invalidated->end(); I!=E; ++I) { 1827bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks SymbolRef sym = *I; 1828bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (SymbolsDirectlyInvalidated.count(sym)) 1829bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks continue; 1830bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks SymbolsIndirectlyInvalidated.insert(sym); 1831bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks } 1832bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1833bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (!SymbolsDirectlyInvalidated.empty()) 1834bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks State = getCheckerManager().runCheckersForPointerEscape(State, 1835233e26acc0ff2a1098f4c813f69286fce840a422Anna Zaks SymbolsDirectlyInvalidated, Call, PSK_DirectEscapeOnCall); 1836bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1837bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks // Notify about the symbols that get indirectly invalidated by the call. 1838bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks if (!SymbolsIndirectlyInvalidated.empty()) 1839bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks State = getCheckerManager().runCheckersForPointerEscape(State, 1840233e26acc0ff2a1098f4c813f69286fce840a422Anna Zaks SymbolsIndirectlyInvalidated, Call, PSK_IndirectEscapeOnCall); 1841bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1842bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks return State; 1843bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks} 1844bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 18459c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalBind - Handle the semantics of binding a value to a specific location. 18469c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// This method is used by evalStore and (soon) VisitDeclStmt, and others. 18479c378f705405d37f49795d5e915989de774fe11fTed Kremenekvoid ExprEngine::evalBind(ExplodedNodeSet &Dst, const Stmt *StoreE, 184893bd5ca766c4d7906878f4ffe76ce1b2080e540bJordy Rose ExplodedNode *Pred, 184932a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek SVal location, SVal Val, 18503682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose bool atDeclInit, const ProgramPoint *PP) { 18513682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose 18523682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose const LocationContext *LC = Pred->getLocationContext(); 18533682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose PostStmt PS(StoreE, LC); 18543682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose if (!PP) 18553682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose PP = &PS; 1856b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1857b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek // Do a previsit of the bind. 1858fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose ExplodedNodeSet CheckedSet; 1859fe27971d54d26997149d6b84057f04ff398d1d5dJordy Rose getCheckerManager().runCheckersForBind(CheckedSet, Pred, location, Val, 18603682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose StoreE, *this, *PP); 1861b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1862bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 1863bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks StmtNodeBuilder Bldr(CheckedSet, Dst, *currBldrCtx); 1864bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 186532a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek // If the location is not a 'Loc', it will already be handled by 186632a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek // the checkers. There is nothing left to do. 18675251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie if (!location.getAs<Loc>()) { 1868bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks const ProgramPoint L = PostStore(StoreE, LC, /*Loc*/0, /*tag*/0); 1869bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks ProgramStateRef state = Pred->getState(); 1870bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks state = processPointerEscapedOnBind(state, location, Val); 1871bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks Bldr.generateNode(L, state, Pred); 187232a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek return; 187332a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek } 187432a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek 18756b6152ba96c164a292cc0b8d8b1d4cecbec27a60Anna Zaks 1876b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 1877b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek I!=E; ++I) { 18783d7c44e01d568e5d5c0fac9c6ccb3f080157ba19Anna Zaks ExplodedNode *PredI = *I; 18793d7c44e01d568e5d5c0fac9c6ccb3f080157ba19Anna Zaks ProgramStateRef state = PredI->getState(); 188032a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek 1881bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks state = processPointerEscapedOnBind(state, location, Val); 1882bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 188332a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek // When binding the value, pass on the hint that this is a initialization. 188432a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek // For initializations, we do not need to inform clients of region 188532a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek // changes. 18865251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie state = state->bindLoc(location.castAs<Loc>(), 188732a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek Val, /* notifyChanges = */ !atDeclInit); 1888bf53dfac8195835028bd6347433f7dbebcc29fc1Anna Zaks 18893d7c44e01d568e5d5c0fac9c6ccb3f080157ba19Anna Zaks const MemRegion *LocReg = 0; 1890dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<loc::MemRegionVal> LocRegVal = 18915251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie location.getAs<loc::MemRegionVal>()) { 18923d7c44e01d568e5d5c0fac9c6ccb3f080157ba19Anna Zaks LocReg = LocRegVal->getRegion(); 189332a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek } 18943682f1ea9c7fddc7dcbc590891158ba40f7fca16Jordan Rose 18953d7c44e01d568e5d5c0fac9c6ccb3f080157ba19Anna Zaks const ProgramPoint L = PostStore(StoreE, LC, LocReg, 0); 1896fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(L, state, PredI); 1897b107c4b7efb907d75620cd3c17f82fe27dc5b745Ted Kremenek } 1898a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek} 1899a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 19009c14953d0c84f7cf5adfb4cd3c0f05a9b1723c1cTed Kremenek/// evalStore - Handle the semantics of a store via an assignment. 1901a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Dst The node set to store generated state nodes 19022e6f5b823912ae76211427cb8684c9eaa6e53a1fJames Dennett/// @param AssignE The assignment expression if the store happens in an 1903e8a4d7d0064b357a30fe7ee4f2ddc02f9ffc0357Zhongxing Xu/// assignment. 19042e6f5b823912ae76211427cb8684c9eaa6e53a1fJames Dennett/// @param LocationE The location expression that is stored to. 1905a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param state The current simulation state 1906a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param location The location to store the value 1907a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek/// @param Val The value to be stored 19089c378f705405d37f49795d5e915989de774fe11fTed Kremenekvoid ExprEngine::evalStore(ExplodedNodeSet &Dst, const Expr *AssignE, 19099c378f705405d37f49795d5e915989de774fe11fTed Kremenek const Expr *LocationE, 19109c378f705405d37f49795d5e915989de774fe11fTed Kremenek ExplodedNode *Pred, 19118bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state, SVal location, SVal Val, 1912ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek const ProgramPointTag *tag) { 191314429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // Proceed with the store. We use AssignE as the anchor for the PostStore 191414429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis // ProgramPoint if it is non-NULL, and LocationE otherwise. 191514429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis const Expr *StoreE = AssignE ? AssignE : LocationE; 191614429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 19171b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Evaluate the location (checks for bad dereferences). 1918b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 1919bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLocation(Tmp, AssignE, LocationE, Pred, state, location, tag, false); 19201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1921b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 19221b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1923b0533965f1b4db020692e3b23ca7b3bc15bf5897Ted Kremenek 192473c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 192573c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1926a8538d902fce9cfec20f39b34492268b51643819Ted Kremenek 1927b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) 19283d7c44e01d568e5d5c0fac9c6ccb3f080157ba19Anna Zaks evalBind(Dst, StoreE, *NI, location, Val, false); 19291b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 19301b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 1931bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenekvoid ExprEngine::evalLoad(ExplodedNodeSet &Dst, 1932bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const Expr *NodeEx, 1933bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const Expr *BoundEx, 1934bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek ExplodedNode *Pred, 1935bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek ProgramStateRef state, 1936bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek SVal location, 1937bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const ProgramPointTag *tag, 1938bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek QualType LoadTy) 1939bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek{ 19405251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie assert(!location.getAs<NonLoc>() && "location cannot be a NonLoc."); 194114429b918bd2f4cb52abc75546a7fe37142054caArgyrios Kyrtzidis 19425b8c69494881b7d35bc6244b4a19be0cc2eab368Jordan Rose // Are we loading from a region? This actually results in two loads; one 1943852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // to fetch the address of the referenced value and one to fetch the 1944852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // referenced value. 19459697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek if (const TypedValueRegion *TR = 19469697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek dyn_cast_or_null<TypedValueRegion>(location.getAsRegion())) { 1947b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1948018220c343c103b7dfaa117a7a474c7a7fd6d068Zhongxing Xu QualType ValTy = TR->getValueType(); 1949852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (const ReferenceType *RT = ValTy->getAs<ReferenceType>()) { 1950ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek static SimpleProgramPointTag 1951ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek loadReferenceTag("ExprEngine : Load Reference"); 1952852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek ExplodedNodeSet Tmp; 1953bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLoadCommon(Tmp, NodeEx, BoundEx, Pred, state, 1954bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek location, &loadReferenceTag, 1955852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek getContext().getPointerType(RT->getPointeeType())); 1956852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1957852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek // Perform the load from the referenced value. 1958852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end() ; I!=E; ++I) { 1959db5e8cd095d1ffdd18f5620ad2348b5f386bebe3Anna Zaks state = (*I)->getState(); 1960bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek location = state->getSVal(BoundEx, (*I)->getLocationContext()); 1961bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLoadCommon(Dst, NodeEx, BoundEx, *I, state, location, tag, LoadTy); 1962b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek } 1963852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return; 1964852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1965852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 1966b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 1967bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLoadCommon(Dst, NodeEx, BoundEx, Pred, state, location, tag, LoadTy); 1968852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek} 1969852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 1970bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenekvoid ExprEngine::evalLoadCommon(ExplodedNodeSet &Dst, 1971bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const Expr *NodeEx, 1972bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const Expr *BoundEx, 1973bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek ExplodedNode *Pred, 1974bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek ProgramStateRef state, 1975bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek SVal location, 1976bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const ProgramPointTag *tag, 1977bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek QualType LoadTy) { 1978bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek assert(NodeEx); 1979bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek assert(BoundEx); 19801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Evaluate the location (checks for bad dereferences). 1981b4b817d704287836b52b34369009e682f208aa2bTed Kremenek ExplodedNodeSet Tmp; 1982bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLocation(Tmp, NodeEx, BoundEx, Pred, state, location, tag, true); 1983b4b817d704287836b52b34369009e682f208aa2bTed Kremenek if (Tmp.empty()) 19841b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek return; 1985b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 198666c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Tmp, Dst, *currBldrCtx); 198773c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis if (location.isUndef()) 198873c498a08f4968b6987d1453c7b77929dcc6d5f7Argyrios Kyrtzidis return; 1989b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 19901b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek // Proceed with the load. 1991b4b817d704287836b52b34369009e682f208aa2bTed Kremenek for (ExplodedNodeSet::iterator NI=Tmp.begin(), NE=Tmp.end(); NI!=NE; ++NI) { 1992db5e8cd095d1ffdd18f5620ad2348b5f386bebe3Anna Zaks state = (*NI)->getState(); 19935eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = (*NI)->getLocationContext(); 199496ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek 19957affe151f5689b2d3547b8947c4099532c78a021Jordan Rose SVal V = UnknownVal(); 19967affe151f5689b2d3547b8947c4099532c78a021Jordan Rose if (location.isValid()) { 199796ebad66c451d79c9f57b1edb31efaeeb23b9a01Ted Kremenek if (LoadTy.isNull()) 1998bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek LoadTy = BoundEx->getType(); 19995251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie V = state->getSVal(location.castAs<Loc>(), LoadTy); 2000b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 20017affe151f5689b2d3547b8947c4099532c78a021Jordan Rose 20027affe151f5689b2d3547b8947c4099532c78a021Jordan Rose Bldr.generateNode(NodeEx, *NI, state->BindExpr(BoundEx, LCtx, V), tag, 20037affe151f5689b2d3547b8947c4099532c78a021Jordan Rose ProgramPoint::PostLoadKind); 2004d5b499d43c3526fae7f9ebb6e2d50e79d3496cedZhongxing Xu } 20051b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek} 20061b8bd4d71c2098126041b4de4267175a82f0103cTed Kremenek 2007bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenekvoid ExprEngine::evalLocation(ExplodedNodeSet &Dst, 2008bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const Stmt *NodeEx, 2009bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const Stmt *BoundEx, 2010bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek ExplodedNode *Pred, 2011bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek ProgramStateRef state, 2012bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek SVal location, 2013bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek const ProgramPointTag *tag, 2014bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek bool isLoad) { 201566c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder BldrTop(Pred, Dst, *currBldrCtx); 201600b1ad2d56f3e39f95c3f61bf511a531ab6a4fa5Zhongxing Xu // Early checks for performance reason. 2017769ce3e93ad35bd9ac28e4d8b8f035ae4fd9a5b5Argyrios Kyrtzidis if (location.isUnknown()) { 2018b4b817d704287836b52b34369009e682f208aa2bTed Kremenek return; 2019b4b817d704287836b52b34369009e682f208aa2bTed Kremenek } 2020b9bbd592c7ea72ada8d982e40a729beb9b53371eTed Kremenek 20219c0d6891b3ec4b0d20b8a295946c0dc5426d147cArgyrios Kyrtzidis ExplodedNodeSet Src; 2022ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks BldrTop.takeNodes(Pred); 202366c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, Src, *currBldrCtx); 2024ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks if (Pred->getState() != state) { 2025eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // Associate this new state with an ExplodedNode. 2026eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // FIXME: If I pass null tag, the graph is incorrect, e.g for 2027eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // int *p; 2028eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // p = 0; 2029eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // *p = 0xDEADBEEF; 2030eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "p = 0" is not noted as "Null pointer value stored to 'p'" but 2031eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // instead "int *p" is noted as 2032eb48bd1dd4168ab206a330bf523659170291a6a0Argyrios Kyrtzidis // "Variable 'p' initialized to a null pointer value" 2033ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek 2034fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose static SimpleProgramPointTag tag("ExprEngine: Location"); 2035fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(NodeEx, Pred, state, &tag); 20360296c22557b3735e2ffeff690eb46fb0e9152bccTed Kremenek } 2037ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks ExplodedNodeSet Tmp; 2038bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek getCheckerManager().runCheckersForLocation(Tmp, Src, location, isLoad, 2039bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek NodeEx, BoundEx, *this); 2040ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks BldrTop.addNodes(Tmp); 2041ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek} 2042ec96a2d52d16e150baaf629cd35e3fabff5d8915Ted Kremenek 20436c7511db998817e64f2e124013e7d7c9a430c580Ted Kremenekstd::pair<const ProgramPointTag *, const ProgramPointTag*> 20440caa2d47b84337e942b3f6652adfafe4ae506cfeTed KremenekExprEngine::geteagerlyAssumeBinOpBifurcationTags() { 20456c7511db998817e64f2e124013e7d7c9a430c580Ted Kremenek static SimpleProgramPointTag 20460caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek eagerlyAssumeBinOpBifurcationTrue("ExprEngine : Eagerly Assume True"), 20470caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek eagerlyAssumeBinOpBifurcationFalse("ExprEngine : Eagerly Assume False"); 20480caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek return std::make_pair(&eagerlyAssumeBinOpBifurcationTrue, 20490caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek &eagerlyAssumeBinOpBifurcationFalse); 20506c7511db998817e64f2e124013e7d7c9a430c580Ted Kremenek} 20516c7511db998817e64f2e124013e7d7c9a430c580Ted Kremenek 20520caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenekvoid ExprEngine::evalEagerlyAssumeBinOpBifurcation(ExplodedNodeSet &Dst, 20530caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek ExplodedNodeSet &Src, 20540caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek const Expr *Ex) { 205566c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Src, Dst, *currBldrCtx); 205686b39f20d5091ca3fdcbeb4a22766aaffdf6ac35Ted Kremenek 2057031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu for (ExplodedNodeSet::iterator I=Src.begin(), E=Src.end(); I!=E; ++I) { 2058031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu ExplodedNode *Pred = *I; 2059b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // Test if the previous node was as the same expression. This can happen 2060b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // when the expression fails to evaluate to anything meaningful and 2061b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek // (as an optimization) we don't generate a node. 20621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ProgramPoint P = Pred->getLocation(); 20637a95de68c093991047ed8d339479ccad51b88663David Blaikie if (!P.getAs<PostStmt>() || P.castAs<PostStmt>().getStmt() != Ex) { 2064b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek continue; 20651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2066b293902c5cfa18365ffb0e00763849c9808a2ad1Ted Kremenek 20678bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 20685eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal V = state->getSVal(Ex, Pred->getLocationContext()); 2069dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie Optional<nonloc::SymbolVal> SEV = V.getAs<nonloc::SymbolVal>(); 20705344baa704f42b22d9df25c24ffbbf6b4716603bAnna Zaks if (SEV && SEV->isExpression()) { 20716c7511db998817e64f2e124013e7d7c9a430c580Ted Kremenek const std::pair<const ProgramPointTag *, const ProgramPointTag*> &tags = 20720caa2d47b84337e942b3f6652adfafe4ae506cfeTed Kremenek geteagerlyAssumeBinOpBifurcationTags(); 20736c7511db998817e64f2e124013e7d7c9a430c580Ted Kremenek 20746960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose ProgramStateRef StateTrue, StateFalse; 20756960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose tie(StateTrue, StateFalse) = state->assume(*SEV); 20766960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose 207748af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // First assume that the condition is true. 20786960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose if (StateTrue) { 207986b39f20d5091ca3fdcbeb4a22766aaffdf6ac35Ted Kremenek SVal Val = svalBuilder.makeIntVal(1U, Ex->getType()); 20805eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek StateTrue = StateTrue->BindExpr(Ex, Pred->getLocationContext(), Val); 2081fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(Ex, Pred, StateTrue, tags.first); 208248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 20831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 208448af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek // Next, assume that the condition is false. 20856960d08b4ddf389d7c81504df7f16dc645120482Jordan Rose if (StateFalse) { 208686b39f20d5091ca3fdcbeb4a22766aaffdf6ac35Ted Kremenek SVal Val = svalBuilder.makeIntVal(0U, Ex->getType()); 20875eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek StateFalse = StateFalse->BindExpr(Ex, Pred->getLocationContext(), Val); 2088fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateNode(Ex, Pred, StateFalse, tags.second); 208948af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 209048af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 209148af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek } 209248af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek} 209348af2a9c1ed3259512f2d1431720add1fbe8fb5fTed Kremenek 2094df5faf5e7ae6823d0af0b801c4ac26d47f2cee97Chad Rosiervoid ExprEngine::VisitGCCAsmStmt(const GCCAsmStmt *A, ExplodedNode *Pred, 2095df5faf5e7ae6823d0af0b801c4ac26d47f2cee97Chad Rosier ExplodedNodeSet &Dst) { 209666c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, Dst, *currBldrCtx); 2097a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen // We have processed both the inputs and the outputs. All of the outputs 2098a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen // should evaluate to Locs. Nuke all of their values. 20991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2100a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen // FIXME: Some day in the future it would be nice to allow a "plug-in" 2101a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen // which interprets the inline asm and stores proper results in the 2102a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen // outputs. 21031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2104a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen ProgramStateRef state = Pred->getState(); 21051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2106df5faf5e7ae6823d0af0b801c4ac26d47f2cee97Chad Rosier for (GCCAsmStmt::const_outputs_iterator OI = A->begin_outputs(), 2107a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen OE = A->end_outputs(); OI != OE; ++OI) { 2108a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen SVal X = state->getSVal(*OI, Pred->getLocationContext()); 21095251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie assert (!X.getAs<NonLoc>()); // Should be an Lval, or unknown, undef. 21101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2111dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<Loc> LV = X.getAs<Loc>()) 21125251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie state = state->bindLoc(*LV, UnknownVal()); 2113ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek } 21141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2115a81d3d434e6581ff354eaf5b2a3c25c75771a792Erik Verbruggen Bldr.generateNode(A, Pred, state); 2116ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek} 2117ef44bfb9d0f15ba0391f8346c9f01355fb450a09Ted Kremenek 21188cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosiervoid ExprEngine::VisitMSAsmStmt(const MSAsmStmt *A, ExplodedNode *Pred, 21198cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier ExplodedNodeSet &Dst) { 212066c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, Dst, *currBldrCtx); 21218cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier Bldr.generateNode(A, Pred, Pred->getState()); 21228cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier} 21238cd64b4c5553fa6284d248336cb7c82dc960a394Chad Rosier 2124094bef56a7900f13bb777f9a352704104b1458e7Ted Kremenek//===----------------------------------------------------------------------===// 2125e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek// Visualization. 2126ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek//===----------------------------------------------------------------------===// 2127ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek 2128aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#ifndef NDEBUG 2129d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisstatic ExprEngine* GraphPrintCheckerState; 2130e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenekstatic SourceManager* GraphPrintSourceManager; 21313b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek 2132aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremeneknamespace llvm { 2133aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenektemplate<> 213447491f8b7adf9d42a404d44c073e8a5308fa6cfcDouglas Gregorstruct DOTGraphTraits<ExplodedNode*> : 2135aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek public DefaultDOTGraphTraits { 2136006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2137006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 2138006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2139d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis // FIXME: Since we do not cache error nodes in ExprEngine now, this does not 2140ec9227fea66c3439991fc84b0d33b0a8b4b8875eZhongxing Xu // work. 21419c378f705405d37f49795d5e915989de774fe11fTed Kremenek static std::string getNodeAttributes(const ExplodedNode *N, void*) { 21421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 214310f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 214410f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to tell if the node is 214510f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // an error node. 2146a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek if (GraphPrintCheckerState->isImplicitNullDeref(N) || 21479dca062461a6244cf0f733346657fa3eee853f9bTed Kremenek GraphPrintCheckerState->isExplicitNullDeref(N) || 21484a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefDeref(N) || 21494a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefStore(N) || 21504a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek GraphPrintCheckerState->isUndefControlFlow(N) || 21515e03fcb5420c33207433dd6f800588e256dd9bdbTed Kremenek GraphPrintCheckerState->isUndefResult(N) || 21522ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isBadCall(N) || 21532ded35a576e3899553ea0ccfcbf5cbdb3d8cf664Ted Kremenek GraphPrintCheckerState->isUndefArg(N)) 2154a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return "color=\"red\",style=\"filled\""; 21551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21568cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek if (GraphPrintCheckerState->isNoReturnCall(N)) 21578cc13ea74fea1c04042a2f4087665bc5182e8408Ted Kremenek return "color=\"blue\",style=\"filled\""; 21582055effed54d614b51e3501a174c9b1fe92e4de4Zhongxing Xu#endif 2159a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek return ""; 2160a3fadfcce5911742801a302cac82d4fe54d5c682Ted Kremenek } 21611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2162cfa88f893915ceb8ae4ce2f17c46c24a4d67502fDmitri Gribenko static void printLocation(raw_ostream &Out, SourceLocation SLoc) { 216328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose if (SLoc.isFileID()) { 216428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose Out << "\\lline=" 216528038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose << GraphPrintSourceManager->getExpansionLineNumber(SLoc) 216628038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose << " col=" 216728038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose << GraphPrintSourceManager->getExpansionColumnNumber(SLoc) 216828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose << "\\l"; 216928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose } 217028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose } 217128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 21729c378f705405d37f49795d5e915989de774fe11fTed Kremenek static std::string getNodeLabel(const ExplodedNode *N, void*){ 21731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 217453ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek std::string sbuf; 217553ba0b636194dbeaa65a6f85316c9397a0c5298bTed Kremenek llvm::raw_string_ostream Out(sbuf); 2176803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek 2177803c9edd06e8f936821525d36b1d8cc131e37d44Ted Kremenek // Program Location. 2178aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek ProgramPoint Loc = N->getLocation(); 21791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2180aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek switch (Loc.getKind()) { 21810b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks case ProgramPoint::BlockEntranceKind: { 21821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "Block Entrance: B" 21837a95de68c093991047ed8d339479ccad51b88663David Blaikie << Loc.castAs<BlockEntrance>().getBlock()->getBlockID(); 21840b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (const NamedDecl *ND = 21850b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks dyn_cast<NamedDecl>(Loc.getLocationContext()->getDecl())) { 21860b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Out << " ("; 21870b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ND->printName(Out); 21880b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Out << ")"; 21890b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 2190aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 21910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 21921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2193aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek case ProgramPoint::BlockExitKind: 2194aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek assert (false); 2195aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek break; 21961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2197102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor case ProgramPoint::CallEnterKind: 2198102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor Out << "CallEnter"; 2199102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 2200102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 22010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks case ProgramPoint::CallExitBeginKind: 22020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Out << "CallExitBegin"; 22030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 22040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 22050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks case ProgramPoint::CallExitEndKind: 22060b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Out << "CallExitEnd"; 22070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 22080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 22090b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks case ProgramPoint::PostStmtPurgeDeadSymbolsKind: 22100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Out << "PostStmtPurgeDeadSymbols"; 22110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 22120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 22130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks case ProgramPoint::PreStmtPurgeDeadSymbolsKind: 22140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Out << "PreStmtPurgeDeadSymbols"; 2215102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor break; 2216102acd5369bbb17c0d6ab868af376671acff7a93Douglas Gregor 22175903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks case ProgramPoint::EpsilonKind: 22185903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks Out << "Epsilon Point"; 22195903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks break; 22205903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 222128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose case ProgramPoint::PreImplicitCallKind: { 22227a95de68c093991047ed8d339479ccad51b88663David Blaikie ImplicitCallPoint PC = Loc.castAs<ImplicitCallPoint>(); 222328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose Out << "PreCall: "; 222428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 222528038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // FIXME: Get proper printing options. 22267a95de68c093991047ed8d339479ccad51b88663David Blaikie PC.getDecl()->print(Out, LangOptions()); 22277a95de68c093991047ed8d339479ccad51b88663David Blaikie printLocation(Out, PC.getLocation()); 222828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose break; 222928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose } 223028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 223128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose case ProgramPoint::PostImplicitCallKind: { 22327a95de68c093991047ed8d339479ccad51b88663David Blaikie ImplicitCallPoint PC = Loc.castAs<ImplicitCallPoint>(); 223328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose Out << "PostCall: "; 223428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 223528038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // FIXME: Get proper printing options. 22367a95de68c093991047ed8d339479ccad51b88663David Blaikie PC.getDecl()->print(Out, LangOptions()); 22377a95de68c093991047ed8d339479ccad51b88663David Blaikie printLocation(Out, PC.getLocation()); 223828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose break; 223928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose } 224028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 22411aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose case ProgramPoint::PostInitializerKind: { 22421aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "PostInitializer: "; 22431aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose const CXXCtorInitializer *Init = 22441aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Loc.castAs<PostInitializer>().getInitializer(); 22451aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose if (const FieldDecl *FD = Init->getAnyMember()) 22461aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << *FD; 22471aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else { 22481aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose QualType Ty = Init->getTypeSourceInfo()->getType(); 22491aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Ty = Ty.getLocalUnqualifiedType(); 2250e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 22511aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Ty.print(Out, LO); 22528c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek } 22531aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose break; 22541aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose } 22558c354758c2d39db87c77c723d81e34b4d967f762Ted Kremenek 22561aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose case ProgramPoint::BlockEdgeKind: { 22577a95de68c093991047ed8d339479ccad51b88663David Blaikie const BlockEdge &E = Loc.castAs<BlockEdge>(); 2258aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek Out << "Edge: (B" << E.getSrc()->getBlockID() << ", B" 2259aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek << E.getDst()->getBlockID() << ')'; 22601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22619c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (const Stmt *T = E.getSrc()->getTerminator()) { 2262e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek SourceLocation SLoc = T->getLocStart(); 22631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2264b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\|Terminator: "; 2265e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 2266e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner E.getSrc()->printTerminator(Out, LO); 22671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22689b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek if (SLoc.isFileID()) { 22699b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek Out << "\\lline=" 2270642116259e8df6286063a17361c20e95b5017a0aChandler Carruth << GraphPrintSourceManager->getExpansionLineNumber(SLoc) 22717da5aea7669e6db3e593162b8a123aef06a04d07Chris Lattner << " col=" 2272a77c031cb66f75d22672070052cc6e0205289ff8Chandler Carruth << GraphPrintSourceManager->getExpansionColumnNumber(SLoc); 22739b5551d7f0209cec8b9c555cf70e893940674e5cTed Kremenek } 22741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2275daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek if (isa<SwitchStmt>(T)) { 22769c378f705405d37f49795d5e915989de774fe11fTed Kremenek const Stmt *Label = E.getDst()->getLabel(); 22771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (Label) { 22799c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (const CaseStmt *C = dyn_cast<CaseStmt>(Label)) { 2280daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\lcase "; 2281e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner LangOptions LO; // FIXME. 2282e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(Out, 0, PrintingPolicy(LO)); 22831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22849c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (const Stmt *RHS = C->getRHS()) { 2285daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << " .. "; 2286e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner RHS->printPretty(Out, 0, PrintingPolicy(LO)); 2287daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 22881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2289daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << ":"; 2290daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 2291daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else { 2292daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek assert (isa<DefaultStmt>(Label)); 2293daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\ldefault:"; 2294daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 2295daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 22961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump else 2297daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek Out << "\\l(implicit) default:"; 2298daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek } 2299daeb9a7376830d637e02b5bc51faf4750a7bce70Ted Kremenek else if (isa<IndirectGotoStmt>(T)) { 2300b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek // FIXME 2301b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 2302b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else { 2303b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\lCondition: "; 2304b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek if (*E.getSrc()->succ_begin() == E.getDst()) 2305b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "true"; 2306b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek else 23071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Out << "false"; 2308b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 23091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2310b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek Out << "\\l"; 2311b38911f16b4943548db6a3695fc6ae23070b25d2Ted Kremenek } 23121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 231310f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#if 0 231410f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // FIXME: Replace with a general scheme to determine 231510f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek // the name of the check. 23164a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek if (GraphPrintCheckerState->isUndefControlFlow(N)) { 23174a4e524afef40d6f3ddb25d0e407c814e4ca56a8Ted Kremenek Out << "\\|Control-flow based on\\lUndefined value.\\l"; 23183b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek } 231910f51e8785e43d5a22acc2d2a638307c582949c2Ted Kremenek#endif 23201aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose break; 23211aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose } 23221aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose 23231aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose default: { 23241aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose const Stmt *S = Loc.castAs<StmtPoint>().getStmt(); 23251aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose 23261aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << S->getStmtClassName() << ' ' << (const void*) S << ' '; 23271aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose LangOptions LO; // FIXME. 23281aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose S->printPretty(Out, 0, PrintingPolicy(LO)); 23291aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose printLocation(Out, S->getLocStart()); 23301aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose 23311aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose if (Loc.getAs<PreStmt>()) 23321aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\lPreStmt\\l;"; 23331aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (Loc.getAs<PostLoad>()) 23341aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\lPostLoad\\l;"; 23351aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (Loc.getAs<PostStore>()) 23361aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\lPostStore\\l"; 23371aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (Loc.getAs<PostLValue>()) 23381aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\lPostLValue\\l"; 23391aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose 23401aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose#if 0 23411aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose // FIXME: Replace with a general scheme to determine 23421aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose // the name of the check. 23431aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose if (GraphPrintCheckerState->isImplicitNullDeref(N)) 23441aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Implicit-Null Dereference.\\l"; 23451aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (GraphPrintCheckerState->isExplicitNullDeref(N)) 23461aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Explicit-Null Dereference.\\l"; 23471aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (GraphPrintCheckerState->isUndefDeref(N)) 23481aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Dereference of undefialied value.\\l"; 23491aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (GraphPrintCheckerState->isUndefStore(N)) 23501aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Store to Undefined Loc."; 23511aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (GraphPrintCheckerState->isUndefResult(N)) 23521aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Result of operation is undefined."; 23531aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (GraphPrintCheckerState->isNoReturnCall(N)) 23541aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Call to function marked \"noreturn\"."; 23551aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (GraphPrintCheckerState->isBadCall(N)) 23561aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Call to NULL/Undefined."; 23571aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose else if (GraphPrintCheckerState->isUndefArg(N)) 23581aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose Out << "\\|Argument in call is undefined"; 23591aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose#endif 23601aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose 23611aa4f5019164592643bf46b7d61f15b6ef509c8eJordan Rose break; 2362aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 2363aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 23641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23658bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = N->getState(); 236631ba6135375433b617a8587ea6cc836a014ebd86Roman Divacky Out << "\\|StateID: " << (const void*) state.getPtr() 236731ba6135375433b617a8587ea6cc836a014ebd86Roman Divacky << " NodeID: " << (const void*) N << "\\|"; 23685eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->printDOT(Out); 2369ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek 2370ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek Out << "\\l"; 2371ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek 2372ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek if (const ProgramPointTag *tag = Loc.getTag()) { 2373ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek Out << "\\|Tag: " << tag->getTagDescription(); 2374ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek Out << "\\l"; 2375ca804539d908d3a0e8c72a0df5f1f571d29490bbTed Kremenek } 2376aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek return Out.str(); 2377aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek } 2378aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek}; 23791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} // end llvm namespace 2380aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek#endif 2381aa66a32ba177338763cd0cf9df8310dfa2e24ff7Ted Kremenek 2382ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#ifndef NDEBUG 23837ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenektemplate <typename ITERATOR> 23849c378f705405d37f49795d5e915989de774fe11fTed KremenekExplodedNode *GetGraphNode(ITERATOR I) { return *I; } 23857ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek 2386031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xutemplate <> ExplodedNode* 2387031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing XuGetGraphNode<llvm::DenseMap<ExplodedNode*, Expr*>::iterator> 2388031ccc0555a82afc2e8afe29e19dd57ff204e2deZhongxing Xu (llvm::DenseMap<ExplodedNode*, Expr*>::iterator I) { 23897ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek return I->first; 23907ec07fd91f6eae8bd619ebb8512805222ca41c92Ted Kremenek} 2391ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek#endif 2392ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek 2393d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidisvoid ExprEngine::ViewGraph(bool trim) { 23941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#ifndef NDEBUG 2395ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek if (trim) { 2396c9963132736782d0c9178c744b3e2307cfb98a08Jordan Rose std::vector<const ExplodedNode*> Src; 2397940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 2398940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Flush any outstanding reports to make sure we cover all the nodes. 2399940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // This does not cause them to get displayed. 2400940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek for (BugReporter::iterator I=BR.begin(), E=BR.end(); I!=E; ++I) 2401940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek const_cast<BugType*>(*I)->FlushReports(BR); 2402940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek 2403940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek // Iterate through the reports and get their nodes. 2404404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis for (BugReporter::EQClasses_iterator 2405404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis EI = BR.EQClasses_begin(), EE = BR.EQClasses_end(); EI != EE; ++EI) { 24064a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer ExplodedNode *N = const_cast<ExplodedNode*>(EI->begin()->getErrorNode()); 2407404fc3ad6bd844bf8ce70cbf9974ab297704a122Argyrios Kyrtzidis if (N) Src.push_back(N); 2408940abcc574580e454689be801f38a3d4d41ab01fTed Kremenek } 24091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2410c9963132736782d0c9178c744b3e2307cfb98a08Jordan Rose ViewGraph(Src); 2411ffe0f43806d4823271c2406c1fccc2373115c36aTed Kremenek } 2412493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek else { 2413493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 2414493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 2415ae6814efb6c41bd0c0f6413d25097105284d5be7Ted Kremenek 2416d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*G.roots_begin(), "ExprEngine"); 24171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2418493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = NULL; 2419493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = NULL; 2420493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek } 2421493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#endif 2422493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek} 2423493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 2424c9963132736782d0c9178c744b3e2307cfb98a08Jordan Rosevoid ExprEngine::ViewGraph(ArrayRef<const ExplodedNode*> Nodes) { 2425493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek#ifndef NDEBUG 2426493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintCheckerState = this; 2427493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek GraphPrintSourceManager = &getContext().getSourceManager(); 24281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2429c9963132736782d0c9178c744b3e2307cfb98a08Jordan Rose OwningPtr<ExplodedGraph> TrimmedG(G.trim(Nodes)); 2430493d7a26d5ea319770ba904b43f2740d43b820cbTed Kremenek 2431cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek if (!TrimmedG.get()) 24326cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer llvm::errs() << "warning: Trimmed ExplodedGraph is empty.\n"; 2433cf118d41f7930a18dce97416ef7834a62642f587Ted Kremenek else 2434d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis llvm::ViewGraph(*TrimmedG->roots_begin(), "TrimmedExprEngine"); 24351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24363b4f6702860208692f6ef28401e68de4e3ff9af9Ted Kremenek GraphPrintCheckerState = NULL; 2437e97ca065c91ff9ca2a2a42eb443eaa553c40441cTed Kremenek GraphPrintSourceManager = NULL; 2438e01c98767dfd7153c3c84637c36659e3bbe16ff7Ted Kremenek#endif 2439ee98546b0d5f3439c4a590b0d7d1545af794a0ecTed Kremenek} 2440