1294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//=-- ExprEngineC.cpp - ExprEngine support for C expressions ----*- C++ -*-===// 2294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 3294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// The LLVM Compiler Infrastructure 4294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 5294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// This file is distributed under the University of Illinois Open Source 6294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// License. See LICENSE.TXT for details. 7294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 8294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//===----------------------------------------------------------------------===// 9294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 10294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// This file defines ExprEngine's support for C expressions. 11294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 12294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//===----------------------------------------------------------------------===// 13294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 149852f58f50b4fc20914fbce5b4454135a42343f4Benjamin Kramer#include "clang/AST/ExprCXX.h" 15294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/CheckerManager.h" 16294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 17294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 18294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace clang; 19294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace ento; 20294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing llvm::APSInt; 21294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 22294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitBinaryOperator(const BinaryOperator* B, 23294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, 24294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 25d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek 26294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek Expr *LHS = B->getLHS()->IgnoreParens(); 27294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek Expr *RHS = B->getRHS()->IgnoreParens(); 2887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 29d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // FIXME: Prechecks eventually go in ::Visit(). 30d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek ExplodedNodeSet CheckedSet; 31d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek ExplodedNodeSet Tmp2; 32d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek getCheckerManager().runCheckersForPreStmt(CheckedSet, Pred, B, *this); 3387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 340e2c34f92f00628d48968dfea096d36381f494cbStephen Hines // With both the LHS and RHS evaluated, process the operation itself. 35d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek for (ExplodedNodeSet::iterator it=CheckedSet.begin(), ei=CheckedSet.end(); 36d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek it != ei; ++it) { 3787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 388bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = (*it)->getState(); 395eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = (*it)->getLocationContext(); 405eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal LeftV = state->getSVal(LHS, LCtx); 415eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal RightV = state->getSVal(RHS, LCtx); 4287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 43d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek BinaryOperator::Opcode Op = B->getOpcode(); 4487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 45d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek if (Op == BO_Assign) { 46d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // EXPERIMENTAL: "Conjured" symbols. 47d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // FIXME: Handle structs. 483cdf584e068056540769dab56cad333e95a89750Anna Zaks if (RightV.isUnknown()) { 4966c486f275531df6362b3511fc3af6563561801bTed Kremenek unsigned Count = currBldrCtx->blockCount(); 506bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines RightV = svalBuilder.conjureSymbolVal(nullptr, B->getRHS(), LCtx, 516bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Count); 52294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 53d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // Simulate the effects of a "store": bind the value of the RHS 54d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // to the L-Value represented by the LHS. 55591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks SVal ExprVal = B->isGLValue() ? LeftV : RightV; 565eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek evalStore(Tmp2, B, LHS, *it, state->BindExpr(B, LCtx, ExprVal), 575eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek LeftV, RightV); 58d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek continue; 59d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek } 6087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 61d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek if (!B->isAssignmentOp()) { 6266c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(*it, Tmp2, *currBldrCtx); 63e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks 64e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks if (B->isAdditiveOp()) { 65e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks // If one of the operands is a location, conjure a symbol for the other 66e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks // one (offset) if it's unknown so that memory arithmetic always 67e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks // results in an ElementRegion. 68e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks // TODO: This can be removed after we enable history tracking with 69e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks // SymSymExpr. 7066c486f275531df6362b3511fc3af6563561801bTed Kremenek unsigned Count = currBldrCtx->blockCount(); 715251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie if (LeftV.getAs<Loc>() && 72a5796f87229b4aeebca71fa6ee1790ae7a5a0382Jordan Rose RHS->getType()->isIntegralOrEnumerationType() && 73a5796f87229b4aeebca71fa6ee1790ae7a5a0382Jordan Rose RightV.isUnknown()) { 743b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek RightV = svalBuilder.conjureSymbolVal(RHS, LCtx, RHS->getType(), 753b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek Count); 76e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks } 775251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie if (RightV.getAs<Loc>() && 78a5796f87229b4aeebca71fa6ee1790ae7a5a0382Jordan Rose LHS->getType()->isIntegralOrEnumerationType() && 79a5796f87229b4aeebca71fa6ee1790ae7a5a0382Jordan Rose LeftV.isUnknown()) { 803b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek LeftV = svalBuilder.conjureSymbolVal(LHS, LCtx, LHS->getType(), 813b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek Count); 82e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks } 83e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks } 84e55a14a025c38800d07f1ab0db7dbbe4a2fe1605Anna Zaks 856bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // Although we don't yet model pointers-to-members, we do need to make 866bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // sure that the members of temporaries have a valid 'this' pointer for 876bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines // other checks. 886bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (B->getOpcode() == BO_PtrMemD) 896bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines state = createTemporaryRegionIfNeeded(state, LCtx, LHS); 906bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 91d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // Process non-assignments except commas or short-circuited 92d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // logical expressions (LAnd and LOr). 9387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar SVal Result = evalBinOp(state, Op, LeftV, RightV, B->getType()); 94d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek if (Result.isUnknown()) { 95ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(B, *it, state); 96294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek continue; 9787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar } 98d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek 9987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar state = state->BindExpr(B, LCtx, Result); 100ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(B, *it, state); 101d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek continue; 102d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek } 10387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 104d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek assert (B->isCompoundAssignmentOp()); 10587d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 106d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek switch (Op) { 107d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek default: 108b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Invalid opcode for compound assignment."); 109d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_MulAssign: Op = BO_Mul; break; 110d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_DivAssign: Op = BO_Div; break; 111d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_RemAssign: Op = BO_Rem; break; 112d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_AddAssign: Op = BO_Add; break; 113d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_SubAssign: Op = BO_Sub; break; 114d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_ShlAssign: Op = BO_Shl; break; 115d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_ShrAssign: Op = BO_Shr; break; 116d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_AndAssign: Op = BO_And; break; 117d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_XorAssign: Op = BO_Xor; break; 118d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek case BO_OrAssign: Op = BO_Or; break; 119d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek } 12087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 121d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // Perform a load (the LHS). This performs the checks for 122d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // null dereferences, and so on. 123d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek ExplodedNodeSet Tmp; 124d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek SVal location = LeftV; 125bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLoad(Tmp, B, LHS, *it, state, location); 12687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 127d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek for (ExplodedNodeSet::iterator I = Tmp.begin(), E = Tmp.end(); I != E; 128d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek ++I) { 129d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek 130d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek state = (*I)->getState(); 1315eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = (*I)->getLocationContext(); 1325eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal V = state->getSVal(LHS, LCtx); 13387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 134d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // Get the computation type. 135d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek QualType CTy = 136294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationResultType(); 137d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek CTy = getContext().getCanonicalType(CTy); 13887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 139d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek QualType CLHSTy = 140294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek cast<CompoundAssignOperator>(B)->getComputationLHSType(); 141d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek CLHSTy = getContext().getCanonicalType(CLHSTy); 14287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 143d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek QualType LTy = getContext().getCanonicalType(LHS->getType()); 14487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 145d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // Promote LHS. 146d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek V = svalBuilder.evalCast(V, CLHSTy, LTy); 14787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 148d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // Compute the result of the operation. 149d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek SVal Result = svalBuilder.evalCast(evalBinOp(state, Op, V, RightV, CTy), 150d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek B->getType(), CTy); 15187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 152d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // EXPERIMENTAL: "Conjured" symbols. 153d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // FIXME: Handle structs. 15487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 155d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek SVal LHSVal; 15687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 15776462f00854171d2aa3ebc34f9aac1c60021b0eaAnna Zaks if (Result.isUnknown()) { 158d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // The symbolic value is actually for the type of the left-hand side 159d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // expression, not the computation type, as this is the value the 160d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // LValue on the LHS will bind to. 1616bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines LHSVal = svalBuilder.conjureSymbolVal(nullptr, B->getRHS(), LCtx, LTy, 16266c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->blockCount()); 163d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // However, we need to convert the symbol to the computation type. 164d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek Result = svalBuilder.evalCast(LHSVal, CTy, LTy); 165d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek } 166d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek else { 167d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // The left-hand side may bind to a different value then the 168d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // computation type. 169d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek LHSVal = svalBuilder.evalCast(Result, LTy, CTy); 170294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 17187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 17287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // In C++, assignment and compound assignment operators return an 173d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // lvalue. 174591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks if (B->isGLValue()) 1755eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state = state->BindExpr(B, LCtx, location); 176d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek else 1775eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state = state->BindExpr(B, LCtx, Result); 17887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 179d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek evalStore(Tmp2, B, LHS, *I, state, location, LHSVal); 180294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 181294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 18287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 183d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek // FIXME: postvisits eventually go in ::Visit() 184d203c026c6f836e79abfbf2171ac4ba30e52db76Ted Kremenek getCheckerManager().runCheckersForPostStmt(Dst, Tmp2, B, *this); 185294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 186294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 187294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitBlockExpr(const BlockExpr *BE, ExplodedNode *Pred, 188294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 18987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 190294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek CanQualType T = getContext().getCanonicalType(BE->getType()); 19185d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek 19287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar const BlockDecl *BD = BE->getBlockDecl(); 19385d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek // Get the value of the block itself. 19487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar SVal V = svalBuilder.getBlockPointer(BD, T, 1953eb52bb5d791630f926ff2226dae25012315ad9aBill Wendling Pred->getLocationContext(), 1963eb52bb5d791630f926ff2226dae25012315ad9aBill Wendling currBldrCtx->blockCount()); 19787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 19885d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek ProgramStateRef State = Pred->getState(); 19987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 20085d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek // If we created a new MemRegion for the block, we should explicitly bind 20185d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek // the captured variables. 20285d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek if (const BlockDataRegion *BDR = 20385d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek dyn_cast_or_null<BlockDataRegion>(V.getAsRegion())) { 20487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 20585d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek BlockDataRegion::referenced_vars_iterator I = BDR->referenced_vars_begin(), 20685d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek E = BDR->referenced_vars_end(); 20787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 20887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar auto CI = BD->capture_begin(); 20987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar auto CE = BD->capture_end(); 21085d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek for (; I != E; ++I) { 21187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar const VarRegion *capturedR = I.getCapturedRegion(); 21287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar const VarRegion *originalR = I.getOriginalRegion(); 21387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 21487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // If the capture had a copy expression, use the result of evaluating 21587d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // that expression, otherwise use the original value. 21687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // We rely on the invariant that the block declaration's capture variables 21787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // are a prefix of the BlockDataRegion's referenced vars (which may include 21887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // referenced globals, etc.) to enable fast lookup of the capture for a 21987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // given referenced var. 22087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar const Expr *copyExpr = nullptr; 22187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar if (CI != CE) { 22287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar assert(CI->getVariable() == capturedR->getDecl()); 22387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar copyExpr = CI->getCopyExpr(); 22487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar CI++; 22587d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar } 22687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 22785d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek if (capturedR != originalR) { 22887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar SVal originalV; 22987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar if (copyExpr) { 23087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar originalV = State->getSVal(copyExpr, Pred->getLocationContext()); 23187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar } else { 23287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar originalV = State->getSVal(loc::MemRegionVal(originalR)); 23387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar } 23485d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek State = State->bindLoc(loc::MemRegionVal(capturedR), originalV); 23585d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek } 23685d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek } 23785d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek } 23887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 239294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet Tmp; 24066c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, Tmp, *currBldrCtx); 2415eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek Bldr.generateNode(BE, Pred, 24285d87df66a50a15a1957f7213802000b451a8ec9Ted Kremenek State->BindExpr(BE, Pred->getLocationContext(), V), 2436bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines nullptr, ProgramPoint::PostLValueKind); 2446bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 245294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // FIXME: Move all post/pre visits to ::Visit(). 246294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(Dst, Tmp, BE, *this); 247294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 248294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 24987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainarvoid ExprEngine::VisitCast(const CastExpr *CastE, const Expr *Ex, 250294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, ExplodedNodeSet &Dst) { 25187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 252294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreStmt; 253294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreStmt, Pred, CastE, *this); 25487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 2557864435ef2bce200224120bd1df3aed98ea5b99aJohn McCall if (CastE->getCastKind() == CK_LValueToRValue) { 256294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek for (ExplodedNodeSet::iterator I = dstPreStmt.begin(), E = dstPreStmt.end(); 257294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek I!=E; ++I) { 258294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *subExprNode = *I; 2598bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = subExprNode->getState(); 2605eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = subExprNode->getLocationContext(); 261bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLoad(Dst, CastE, CastE, subExprNode, state, state->getSVal(Ex, LCtx)); 262294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 263294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek return; 264294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 26587d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 26687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // All other casts. 267294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek QualType T = CastE->getType(); 268294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek QualType ExTy = Ex->getType(); 26987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 270294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek if (const ExplicitCastExpr *ExCast=dyn_cast_or_null<ExplicitCastExpr>(CastE)) 271294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek T = ExCast->getTypeAsWritten(); 27287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 27366c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(dstPreStmt, Dst, *currBldrCtx); 274294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek for (ExplodedNodeSet::iterator I = dstPreStmt.begin(), E = dstPreStmt.end(); 275294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek I != E; ++I) { 27687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 277294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek Pred = *I; 278c386d8f148c1a9d4992c64188e2873fcbc6da20dJordan Rose ProgramStateRef state = Pred->getState(); 279c386d8f148c1a9d4992c64188e2873fcbc6da20dJordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 280c386d8f148c1a9d4992c64188e2873fcbc6da20dJordan Rose 281294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek switch (CastE->getCastKind()) { 282294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_LValueToRValue: 283b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("LValueToRValue casts handled earlier."); 284294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_ToVoid: 285294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek continue; 286294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // The analyzer doesn't do anything special with these casts, 287294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // since it understands retain/release semantics already. 28833e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCProduceObject: 28933e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: 29033e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: 29133e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCExtendBlockObject: // Fall-through. 292ac1303eca6cbe3e623fb5ec6fe7ec184ef4b0dfaDouglas Gregor case CK_CopyAndAutoreleaseBlockObject: 2937a7ee3033e44b45630981355460ef89efa0bdcc4David Chisnall // The analyser can ignore atomic casts for now, although some future 2947a7ee3033e44b45630981355460ef89efa0bdcc4David Chisnall // checkers may want to make certain that you're not modifying the same 2957a7ee3033e44b45630981355460ef89efa0bdcc4David Chisnall // value through atomic and nonatomic pointers. 2967a7ee3033e44b45630981355460ef89efa0bdcc4David Chisnall case CK_AtomicToNonAtomic: 2977a7ee3033e44b45630981355460ef89efa0bdcc4David Chisnall case CK_NonAtomicToAtomic: 298294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // True no-ops. 299294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_NoOp: 300c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose case CK_ConstructorConversion: 301c386d8f148c1a9d4992c64188e2873fcbc6da20dJordan Rose case CK_UserDefinedConversion: 302a6c66cedc022c9e5d45a937d6b8cff491a6bf81bEli Friedman case CK_FunctionToPointerDecay: 303a6c66cedc022c9e5d45a937d6b8cff491a6bf81bEli Friedman case CK_BuiltinFnToFnPtr: { 304294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Copy the SVal of Ex to CastE. 3058bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 3065eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = Pred->getLocationContext(); 3075eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal V = state->getSVal(Ex, LCtx); 3085eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state = state->BindExpr(CastE, LCtx, V); 309ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(CastE, Pred, state); 310294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek continue; 311294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 3120156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose case CK_MemberPointerToBoolean: 3130156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose // FIXME: For now, member pointers are represented by void *. 3140156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose // FALLTHROUGH 315294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_Dependent: 316294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_ArrayToPointerDecay: 317294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_BitCast: 318651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines case CK_AddressSpaceConversion: 3194967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar case CK_BooleanToSignedIntegral: 320294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_NullToPointer: 321294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralToPointer: 322294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_PointerToIntegral: 323294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_PointerToBoolean: 324294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralToBoolean: 325294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralToFloating: 326294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingToIntegral: 327294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingToBoolean: 328294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingCast: 329294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingRealToComplex: 330294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingComplexToReal: 331294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingComplexToBoolean: 332294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingComplexCast: 333294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_FloatingComplexToIntegralComplex: 334294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralRealToComplex: 335294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralComplexToReal: 336294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralComplexToBoolean: 337294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralComplexCast: 338294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_IntegralComplexToFloatingComplex: 3391d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 3401d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 34187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar case CK_AnyPointerToBlockPointerCast: 34287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar case CK_ObjCObjectLValueCast: 3433056439bb175db8c46b89fb4385de8b3a8e42d0dAnna Zaks case CK_ZeroToOCLEvent: 3443056439bb175db8c46b89fb4385de8b3a8e42d0dAnna Zaks case CK_LValueBitCast: { 345294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Delegate to SValBuilder to process. 3465eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal V = state->getSVal(Ex, LCtx); 347294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek V = svalBuilder.evalCast(V, T, ExTy); 3484967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar // Negate the result if we're treating the boolean as a signed i1 3494967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar if (CastE->getCastKind() == CK_BooleanToSignedIntegral) 3504967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar V = evalMinus(V); 3514967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar state = state->BindExpr(CastE, LCtx, V); 3524967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar Bldr.generateNode(CastE, Pred, state); 3534967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar continue; 3544967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar } 3554967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar case CK_IntegralCast: { 3564967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar // Delegate to SValBuilder to process. 3574967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar SVal V = state->getSVal(Ex, LCtx); 3584967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar V = svalBuilder.evalIntegralCast(state, V, T, ExTy); 3595eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state = state->BindExpr(CastE, LCtx, V); 360ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(CastE, Pred, state); 361294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek continue; 362294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 363294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_DerivedToBase: 364294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_UncheckedDerivedToBase: { 365294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // For DerivedToBase cast, delegate to the store manager. 3665eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal val = state->getSVal(Ex, LCtx); 3672c5f8d79ed128892fa548a3308a938a3a53fbb5eJordan Rose val = getStoreManager().evalDerivedToBase(val, CastE); 3685eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state = state->BindExpr(CastE, LCtx, val); 369ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(CastE, Pred, state); 370294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek continue; 371294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 372e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks // Handle C++ dyn_cast. 373e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks case CK_Dynamic: { 374e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks SVal val = state->getSVal(Ex, LCtx); 375e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks 376e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks // Compute the type of the result. 377e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks QualType resultType = CastE->getType(); 378591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks if (CastE->isGLValue()) 379e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks resultType = getContext().getPointerType(resultType); 380e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks 381e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks bool Failed = false; 382e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks 383e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks // Check if the value being cast evaluates to 0. 384e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks if (val.isZeroConstant()) 385e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks Failed = true; 386e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks // Else, evaluate the cast. 387e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks else 388e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks val = getStoreManager().evalDynamicCast(val, T, Failed); 389e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks 390e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks if (Failed) { 391a2c8d2edfff1573450c6feba876830dd746ffaadAnna Zaks if (T->isReferenceType()) { 392a2c8d2edfff1573450c6feba876830dd746ffaadAnna Zaks // A bad_cast exception is thrown if input value is a reference. 393a2c8d2edfff1573450c6feba876830dd746ffaadAnna Zaks // Currently, we model this, by generating a sink. 394fa06f0464a04bb7fce1fcfb3780d151bb029e00cJordan Rose Bldr.generateSink(CastE, Pred, state); 395a2c8d2edfff1573450c6feba876830dd746ffaadAnna Zaks continue; 396a2c8d2edfff1573450c6feba876830dd746ffaadAnna Zaks } else { 3977ea1c5639764aa3ebe124f4350c5f2b3be795667Anna Zaks // If the cast fails on a pointer, bind to 0. 3987ea1c5639764aa3ebe124f4350c5f2b3be795667Anna Zaks state = state->BindExpr(CastE, LCtx, svalBuilder.makeNull()); 399a2c8d2edfff1573450c6feba876830dd746ffaadAnna Zaks } 400e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks } else { 401e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks // If we don't know if the cast succeeded, conjure a new symbol. 402e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks if (val.isUnknown()) { 4033b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek DefinedOrUnknownSVal NewSym = 4046bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines svalBuilder.conjureSymbolVal(nullptr, CastE, LCtx, resultType, 40566c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->blockCount()); 406e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks state = state->BindExpr(CastE, LCtx, NewSym); 40787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar } else 408e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks // Else, bind to the derived region value. 409e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks state = state->BindExpr(CastE, LCtx, val); 410e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks } 411e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks Bldr.generateNode(CastE, Pred, state); 412e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks continue; 413e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks } 4140156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose case CK_NullToMemberPointer: { 4150156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose // FIXME: For now, member pointers are represented by void *. 416330231537010ab1d77affcbcaffd4bbe358b4cfaJordan Rose SVal V = svalBuilder.makeNull(); 4170156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose state = state->BindExpr(CastE, LCtx, V); 4180156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose Bldr.generateNode(CastE, Pred, state); 4190156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose continue; 4200156439a3d718ea0ef5922c38d189a60829c8a86Jordan Rose } 421e19f86edab8fb3c2c1e99e0e9815b6058504df9bAnna Zaks // Various C++ casts that are not handled yet. 422294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_ToUnion: 423294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_BaseToDerived: 424294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_BaseToDerivedMemberPointer: 425294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case CK_DerivedToBaseMemberPointer: 4264d4e5c1ae83f4510caa486b3ad19de13048f9f04John McCall case CK_ReinterpretMemberPointer: 4273056439bb175db8c46b89fb4385de8b3a8e42d0dAnna Zaks case CK_VectorSplat: { 428294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Recover some path-sensitivty by conjuring a new value. 429294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek QualType resultType = CastE->getType(); 430591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks if (CastE->isGLValue()) 431294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek resultType = getContext().getPointerType(resultType); 4326bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines SVal result = svalBuilder.conjureSymbolVal(nullptr, CastE, LCtx, 43366c486f275531df6362b3511fc3af6563561801bTed Kremenek resultType, 43466c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->blockCount()); 435c386d8f148c1a9d4992c64188e2873fcbc6da20dJordan Rose state = state->BindExpr(CastE, LCtx, result); 436ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.generateNode(CastE, Pred, state); 437294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek continue; 438294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 439294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 440294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 441294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 442294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 443294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCompoundLiteralExpr(const CompoundLiteralExpr *CL, 444294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, 445294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 44666c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder B(Pred, Dst, *currBldrCtx); 447d231d0130a95336610ab9a42eaeb2cdac19992f3Anna Zaks 4486376703eb3325fe41233aed234fde81164af42a1Jordan Rose ProgramStateRef State = Pred->getState(); 4496376703eb3325fe41233aed234fde81164af42a1Jordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 4506376703eb3325fe41233aed234fde81164af42a1Jordan Rose 4516376703eb3325fe41233aed234fde81164af42a1Jordan Rose const Expr *Init = CL->getInitializer(); 4526376703eb3325fe41233aed234fde81164af42a1Jordan Rose SVal V = State->getSVal(CL->getInitializer(), LCtx); 45387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 4546376703eb3325fe41233aed234fde81164af42a1Jordan Rose if (isa<CXXConstructExpr>(Init)) { 4556376703eb3325fe41233aed234fde81164af42a1Jordan Rose // No work needed. Just pass the value up to this expression. 4566376703eb3325fe41233aed234fde81164af42a1Jordan Rose } else { 4576376703eb3325fe41233aed234fde81164af42a1Jordan Rose assert(isa<InitListExpr>(Init)); 4586376703eb3325fe41233aed234fde81164af42a1Jordan Rose Loc CLLoc = State->getLValue(CL, LCtx); 4596376703eb3325fe41233aed234fde81164af42a1Jordan Rose State = State->bindLoc(CLLoc, V); 4606376703eb3325fe41233aed234fde81164af42a1Jordan Rose 4616376703eb3325fe41233aed234fde81164af42a1Jordan Rose // Compound literal expressions are a GNU extension in C++. 4626376703eb3325fe41233aed234fde81164af42a1Jordan Rose // Unlike in C, where CLs are lvalues, in C++ CLs are prvalues, 4636376703eb3325fe41233aed234fde81164af42a1Jordan Rose // and like temporary objects created by the functional notation T() 4646376703eb3325fe41233aed234fde81164af42a1Jordan Rose // CLs are destroyed at the end of the containing full-expression. 4656376703eb3325fe41233aed234fde81164af42a1Jordan Rose // HOWEVER, an rvalue of array type is not something the analyzer can 4666376703eb3325fe41233aed234fde81164af42a1Jordan Rose // reason about, since we expect all regions to be wrapped in Locs. 4676376703eb3325fe41233aed234fde81164af42a1Jordan Rose // So we treat array CLs as lvalues as well, knowing that they will decay 4686376703eb3325fe41233aed234fde81164af42a1Jordan Rose // to pointers as soon as they are used. 4696376703eb3325fe41233aed234fde81164af42a1Jordan Rose if (CL->isGLValue() || CL->getType()->isArrayType()) 4706376703eb3325fe41233aed234fde81164af42a1Jordan Rose V = CLLoc; 4716376703eb3325fe41233aed234fde81164af42a1Jordan Rose } 472333e05f24717c79637e83806fd5142c752a86afaJordan Rose 4736376703eb3325fe41233aed234fde81164af42a1Jordan Rose B.generateNode(CL, Pred, State->BindExpr(CL, LCtx, V)); 474294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 475294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 476294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitDeclStmt(const DeclStmt *DS, ExplodedNode *Pred, 477294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 478294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Assumption: The CFG has one DeclStmt per Decl. 4798135886ab74d852a6702b1f5656a0b146abe210aAnna Zaks const VarDecl *VD = dyn_cast_or_null<VarDecl>(*DS->decl_begin()); 4802b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks 4818135886ab74d852a6702b1f5656a0b146abe210aAnna Zaks if (!VD) { 482ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks //TODO:AZ: remove explicit insertion after refactoring is done. 483ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Dst.insert(Pred); 484294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek return; 485ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks } 48687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 487294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // FIXME: all pre/post visits should eventually be handled by ::Visit(). 488294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 489294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, DS, *this); 49087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 491c07cad8364e7fb0e8cb0d5181edb7db718271b65Jordan Rose ExplodedNodeSet dstEvaluated; 492c07cad8364e7fb0e8cb0d5181edb7db718271b65Jordan Rose StmtNodeBuilder B(dstPreVisit, dstEvaluated, *currBldrCtx); 493294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 494294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek I!=E; ++I) { 495294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *N = *I; 4968bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = N->getState(); 497294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const LocationContext *LC = N->getLocationContext(); 4982b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks 4992b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks // Decls without InitExpr are not initialized explicitly. 500294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek if (const Expr *InitEx = VD->getInit()) { 5012b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks 5022b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks // Note in the state that the initialization has occurred. 5032b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks ExplodedNode *UpdatedN = N; 504e460c46c5d602f65354cab0879c458890273591cJordan Rose SVal InitVal = state->getSVal(InitEx, LC); 505b98b998e9a5637012ab39ad1dabdad7c798721e8Ted Kremenek 50687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar assert(DS->isSingleDecl()); 50787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar if (auto *CtorExpr = findDirectConstructorForCurrentCFGElement()) { 50887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar assert(InitEx->IgnoreImplicit() == CtorExpr); 50987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar (void)CtorExpr; 51048b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose // We constructed the object directly in the variable. 51148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose // No need to bind anything. 5122b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks B.generateNode(DS, UpdatedN, state); 51348b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose } else { 51448b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose // We bound the temp obj region to the CXXConstructExpr. Now recover 51548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose // the lazy compound value when the variable is not a reference. 5165251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie if (AMgr.getLangOpts().CPlusPlus && VD->getType()->isRecordType() && 5175251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie !VD->getType()->isReferenceType()) { 518dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<loc::MemRegionVal> M = 5195251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie InitVal.getAs<loc::MemRegionVal>()) { 5205251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie InitVal = state->getSVal(M->getRegion()); 5215251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie assert(InitVal.getAs<nonloc::LazyCompoundVal>()); 5225251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie } 52348b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose } 52487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 52548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose // Recover some path-sensitivity if a scalar value evaluated to 52648b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose // UnknownVal. 52748b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose if (InitVal.isUnknown()) { 52848b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose QualType Ty = InitEx->getType(); 52948b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose if (InitEx->isGLValue()) { 53048b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose Ty = getContext().getPointerType(Ty); 53148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose } 53248b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose 5336bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines InitVal = svalBuilder.conjureSymbolVal(nullptr, InitEx, LC, Ty, 53466c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->blockCount()); 53548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose } 5362b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks 5372b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks 5382b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks B.takeNodes(UpdatedN); 53948b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNodeSet Dst2; 5402b6876173b36d92aaf379c29cb339d91b4d358eeAnna Zaks evalBind(Dst2, DS, UpdatedN, state->getLValue(VD, LC), InitVal, true); 54148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose B.addNodes(Dst2); 542294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 543294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 544294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek else { 54532a549a64922af0903bdb777613ae7ae4490b70fTed Kremenek B.generateNode(DS, N, state); 546294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 547294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 548c07cad8364e7fb0e8cb0d5181edb7db718271b65Jordan Rose 549c07cad8364e7fb0e8cb0d5181edb7db718271b65Jordan Rose getCheckerManager().runCheckersForPostStmt(Dst, B.getResults(), DS, *this); 550294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 551294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 552294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitLogicalExpr(const BinaryOperator* B, ExplodedNode *Pred, 553294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 554294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek assert(B->getOpcode() == BO_LAnd || 555294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek B->getOpcode() == BO_LOr); 556ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks 55766c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Pred, Dst, *currBldrCtx); 5588bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 5593f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek 560dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling ExplodedNode *N = Pred; 561dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling while (!N->getLocation().getAs<BlockEntrance>()) { 562dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling ProgramPoint P = N->getLocation(); 563dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling assert(P.getAs<PreStmt>()|| P.getAs<PreStmtPurgeDeadSymbols>()); 564dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling (void) P; 565dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling assert(N->pred_size() == 1); 566dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling N = *N->pred_begin(); 567dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling } 568dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling assert(N->pred_size() == 1); 569dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling N = *N->pred_begin(); 570dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling BlockEdge BE = N->getLocation().castAs<BlockEdge>(); 571dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling SVal X; 572dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling 573dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // Determine the value of the expression by introspecting how we 574dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // got this location in the CFG. This requires looking at the previous 575dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // block we were in and what kind of control-flow transfer was involved. 576dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling const CFGBlock *SrcBlock = BE.getSrc(); 577dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // The only terminator (if there is one) that makes sense is a logical op. 578dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling CFGTerminator T = SrcBlock->getTerminator(); 579dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling if (const BinaryOperator *Term = cast_or_null<BinaryOperator>(T.getStmt())) { 580dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling (void) Term; 581dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling assert(Term->isLogicalOp()); 582dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling assert(SrcBlock->succ_size() == 2); 583dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // Did we take the true or false branch? 584dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling unsigned constant = (*SrcBlock->succ_begin() == BE.getDst()) ? 1 : 0; 585dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling X = svalBuilder.makeIntVal(constant, B->getType()); 586dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling } 587dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling else { 588dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // If there is no terminator, by construction the last statement 589dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // in SrcBlock is the value of the enclosing expression. 590dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // However, we still need to constrain that value to be 0 or 1. 591dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling assert(!SrcBlock->empty()); 592dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling CFGStmt Elem = SrcBlock->rbegin()->castAs<CFGStmt>(); 593dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling const Expr *RHS = cast<Expr>(Elem.getStmt()); 594dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling SVal RHSVal = N->getState()->getSVal(RHS, Pred->getLocationContext()); 595dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling 596dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling if (RHSVal.isUndef()) { 597dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling X = RHSVal; 598707a8659a546d32cf976d4c3927c793a643b18e1Ted Kremenek } else { 599dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling DefinedOrUnknownSVal DefinedRHS = RHSVal.castAs<DefinedOrUnknownSVal>(); 600dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling ProgramStateRef StTrue, StFalse; 601651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines std::tie(StTrue, StFalse) = N->getState()->assume(DefinedRHS); 602dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling if (StTrue) { 603dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling if (StFalse) { 604dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // We can't constrain the value to 0 or 1. 605dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // The best we can do is a cast. 606dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling X = getSValBuilder().evalCast(RHSVal, B->getType(), RHS->getType()); 607dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling } else { 608dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // The value is known to be true. 609dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling X = getSValBuilder().makeIntVal(1, B->getType()); 610dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling } 611dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling } else { 612dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling // The value is known to be false. 613dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling assert(StFalse && "Infeasible path!"); 614dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling X = getSValBuilder().makeIntVal(0, B->getType()); 615dd9e9cec6f863afa15dd91b34fbf15c66c678c02Bill Wendling } 6167f839a6b35e5007964b538423b0a570eed26fc10Jordan Rose } 617294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 6183f635c08b2d0b2d5bafb38da09589cb238407faaTed Kremenek Bldr.generateNode(B, Pred, state->BindExpr(B, Pred->getLocationContext(), X)); 619294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 620294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 621294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitInitListExpr(const InitListExpr *IE, 622294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, 623294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 62466c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder B(Pred, Dst, *currBldrCtx); 625294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 6268bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 6275eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = Pred->getLocationContext(); 628294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek QualType T = getContext().getCanonicalType(IE->getType()); 629294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek unsigned NumInitElements = IE->getNumInits(); 630bd34520a8c4fe689cca8afaa8114e50bd6bad8f8Anna Zaks 631bd34520a8c4fe689cca8afaa8114e50bd6bad8f8Anna Zaks if (!IE->isGLValue() && 632bd34520a8c4fe689cca8afaa8114e50bd6bad8f8Anna Zaks (T->isArrayType() || T->isRecordType() || T->isVectorType() || 633bd34520a8c4fe689cca8afaa8114e50bd6bad8f8Anna Zaks T->isAnyComplexType())) { 634294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek llvm::ImmutableList<SVal> vals = getBasicVals().getEmptySValList(); 63587d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 636294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Handle base case where the initializer has no elements. 637294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // e.g: static int* myArray[] = {}; 638294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek if (NumInitElements == 0) { 639294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek SVal V = svalBuilder.makeCompoundVal(T, vals); 6405eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek B.generateNode(IE, Pred, state->BindExpr(IE, LCtx, V)); 641294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek return; 642294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 64387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 644294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek for (InitListExpr::const_reverse_iterator it = IE->rbegin(), 645294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ei = IE->rend(); it != ei; ++it) { 6461994e3993e5e2c606f4ab22563768af6f03dad30Ted Kremenek SVal V = state->getSVal(cast<Expr>(*it), LCtx); 6471994e3993e5e2c606f4ab22563768af6f03dad30Ted Kremenek vals = getBasicVals().consVals(V, vals); 648294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 64987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 6506b6152ba96c164a292cc0b8d8b1d4cecbec27a60Anna Zaks B.generateNode(IE, Pred, 6515eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek state->BindExpr(IE, LCtx, 6525eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek svalBuilder.makeCompoundVal(T, vals))); 653294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek return; 654294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 65513dd47a0c01f8b4a6b3fbe379218f7ba8e692d0fAnna Zaks 656bd34520a8c4fe689cca8afaa8114e50bd6bad8f8Anna Zaks // Handle scalars: int{5} and int{} and GLvalues. 657bd34520a8c4fe689cca8afaa8114e50bd6bad8f8Anna Zaks // Note, if the InitListExpr is a GLvalue, it means that there is an address 658bd34520a8c4fe689cca8afaa8114e50bd6bad8f8Anna Zaks // representing it, so it must have a single init element. 65989e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose assert(NumInitElements <= 1); 66089e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose 66189e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose SVal V; 66289e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose if (NumInitElements == 0) 66389e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose V = getSValBuilder().makeZeroVal(T); 66489e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose else 66589e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose V = state->getSVal(IE->getInit(0), LCtx); 66689e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose 66789e5aaf57e20b39e35b0d068ebbc09ae736f2e1eJordan Rose B.generateNode(IE, Pred, state->BindExpr(IE, LCtx, V)); 668294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 669294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 670294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitGuardedExpr(const Expr *Ex, 67187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar const Expr *L, 672294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Expr *R, 673294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, 674294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 675d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks assert(L && R); 676d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks 67766c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder B(Pred, Dst, *currBldrCtx); 6788bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState(); 6795eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek const LocationContext *LCtx = Pred->getLocationContext(); 6806bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines const CFGBlock *SrcBlock = nullptr; 681469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek 682d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks // Find the predecessor block. 683d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks ProgramStateRef SrcState = state; 6846da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek for (const ExplodedNode *N = Pred ; N ; N = *N->pred_begin()) { 6856da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek ProgramPoint PP = N->getLocation(); 6867a95de68c093991047ed8d339479ccad51b88663David Blaikie if (PP.getAs<PreStmtPurgeDeadSymbols>() || PP.getAs<BlockEntrance>()) { 6876da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek assert(N->pred_size() == 1); 6886da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek continue; 6896da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek } 6907a95de68c093991047ed8d339479ccad51b88663David Blaikie SrcBlock = PP.castAs<BlockEdge>().getSrc(); 691d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks SrcState = N->getState(); 6926da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek break; 6936da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek } 6946da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek 69541f3f3a4792f46787632fdb94f952f6b3ce3f4aeJordan Rose assert(SrcBlock && "missing function entry"); 69641f3f3a4792f46787632fdb94f952f6b3ce3f4aeJordan Rose 6976da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek // Find the last expression in the predecessor block. That is the 6986da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek // expression that is used for the value of the ternary expression. 6996da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek bool hasValue = false; 700469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek SVal V; 7016da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek 70287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar for (CFGElement CE : llvm::reverse(*SrcBlock)) { 703b07805485c603be3d8011f72611465324c9e664bDavid Blaikie if (Optional<CFGStmt> CS = CE.getAs<CFGStmt>()) { 704b07805485c603be3d8011f72611465324c9e664bDavid Blaikie const Expr *ValEx = cast<Expr>(CS->getStmt()); 705d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks ValEx = ValEx->IgnoreParens(); 706d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks 707d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks // For GNU extension '?:' operator, the left hand side will be an 708d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks // OpaqueValueExpr, so get the underlying expression. 709d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks if (const OpaqueValueExpr *OpaqueEx = dyn_cast<OpaqueValueExpr>(L)) 710d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks L = OpaqueEx->getSourceExpr(); 711d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks 712d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks // If the last expression in the predecessor block matches true or false 713d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks // subexpression, get its the value. 714d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks if (ValEx == L->IgnoreParens() || ValEx == R->IgnoreParens()) { 715d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks hasValue = true; 716d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks V = SrcState->getSVal(ValEx, LCtx); 717d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks } 718469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek break; 719469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek } 720469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek } 7216da60499eae46caf9f92f7ba35c607043dc3f7faTed Kremenek 722d8eeac5bd5e3cca0b3ff3993ee479ec9e66f386eAnna Zaks if (!hasValue) 7236bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines V = svalBuilder.conjureSymbolVal(nullptr, Ex, LCtx, 7246bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines currBldrCtx->blockCount()); 725469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek 726469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek // Generate a new node with the binding from the appropriate path. 727469841a8e0967f038aa0f78e1926ce82e06248c7Ted Kremenek B.generateNode(Ex, Pred, state->BindExpr(Ex, LCtx, V, true)); 728294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 729294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 730294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine:: 73187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga NainarVisitOffsetOfExpr(const OffsetOfExpr *OOE, 732294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, ExplodedNodeSet &Dst) { 73366c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder B(Pred, Dst, *currBldrCtx); 73480d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith APSInt IV; 73580d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith if (OOE->EvaluateAsInt(IV, getContext())) { 736294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek assert(IV.getBitWidth() == getContext().getTypeSize(OOE->getType())); 737a5796f87229b4aeebca71fa6ee1790ae7a5a0382Jordan Rose assert(OOE->getType()->isBuiltinType()); 738a5796f87229b4aeebca71fa6ee1790ae7a5a0382Jordan Rose assert(OOE->getType()->getAs<BuiltinType>()->isInteger()); 739a5796f87229b4aeebca71fa6ee1790ae7a5a0382Jordan Rose assert(IV.isSigned() == OOE->getType()->isSignedIntegerType()); 740294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek SVal X = svalBuilder.makeIntVal(IV); 7415eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek B.generateNode(OOE, Pred, 7425eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek Pred->getState()->BindExpr(OOE, Pred->getLocationContext(), 7435eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek X)); 744294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 745294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // FIXME: Handle the case where __builtin_offsetof is not a constant. 746294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 747294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 748294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 749294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine:: 750294fd0a62b95f512637910bf85c7efa6c2354b50Ted KremenekVisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *Ex, 751294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, 752294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 753651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // FIXME: Prechecks eventually go in ::Visit(). 754651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ExplodedNodeSet CheckedSet; 755651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines getCheckerManager().runCheckersForPreStmt(CheckedSet, Pred, Ex, *this); 756651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 757651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ExplodedNodeSet EvalSet; 758651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines StmtNodeBuilder Bldr(CheckedSet, EvalSet, *currBldrCtx); 759294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 760294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek QualType T = Ex->getTypeOfArgument(); 761651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 762651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 763651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines I != E; ++I) { 764651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (Ex->getKind() == UETT_SizeOf) { 765651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!T->isIncompleteType() && !T->isConstantSizeType()) { 766651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert(T->isVariableArrayType() && "Unknown non-constant-sized type."); 76787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 768651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // FIXME: Add support for VLA type arguments and VLA expressions. 769651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // When that happens, we should probably refactor VLASizeChecker's code. 770651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines continue; 771651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } else if (T->getAs<ObjCObjectType>()) { 772651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Some code tries to take the sizeof an ObjCObjectType, relying that 773651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // the compiler has laid out its representation. Just report Unknown 774651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // for these. 775651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines continue; 776651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 777294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 77887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 779651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines APSInt Value = Ex->EvaluateKnownConstInt(getContext()); 780651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CharUnits amt = CharUnits::fromQuantity(Value.getZExtValue()); 78187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 782651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ProgramStateRef state = (*I)->getState(); 783651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines state = state->BindExpr(Ex, (*I)->getLocationContext(), 784651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines svalBuilder.makeIntVal(amt.getQuantity(), 785651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Ex->getType())); 786651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Bldr.generateNode(Ex, *I, state); 787294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 788651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 789651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines getCheckerManager().runCheckersForPostStmt(Dst, EvalSet, Ex, *this); 790294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 791294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 79287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainarvoid ExprEngine::VisitUnaryOperator(const UnaryOperator* U, 793294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNode *Pred, 7948ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks ExplodedNodeSet &Dst) { 795d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose // FIXME: Prechecks eventually go in ::Visit(). 796d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose ExplodedNodeSet CheckedSet; 797d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose getCheckerManager().runCheckersForPreStmt(CheckedSet, Pred, U, *this); 798d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose 799d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose ExplodedNodeSet EvalSet; 800d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose StmtNodeBuilder Bldr(CheckedSet, EvalSet, *currBldrCtx); 801d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose 802d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose for (ExplodedNodeSet::iterator I = CheckedSet.begin(), E = CheckedSet.end(); 803d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose I != E; ++I) { 804d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose switch (U->getOpcode()) { 805ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks default: { 806d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose Bldr.takeNodes(*I); 807ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks ExplodedNodeSet Tmp; 808d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose VisitIncrementDecrementOperator(U, *I, Tmp); 809ebae6d0209e1ec3d5ea14f9e63bd0d740218ed14Anna Zaks Bldr.addNodes(Tmp); 810294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek break; 811d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose } 812294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_Real: { 813294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Expr *Ex = U->getSubExpr()->IgnoreParens(); 81487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 815019316636b0a2d2273b945a98e52d454acee66efTed Kremenek // FIXME: We don't have complex SValues yet. 816019316636b0a2d2273b945a98e52d454acee66efTed Kremenek if (Ex->getType()->isAnyComplexType()) { 817019316636b0a2d2273b945a98e52d454acee66efTed Kremenek // Just report "Unknown." 818019316636b0a2d2273b945a98e52d454acee66efTed Kremenek break; 819019316636b0a2d2273b945a98e52d454acee66efTed Kremenek } 82087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 821019316636b0a2d2273b945a98e52d454acee66efTed Kremenek // For all other types, UO_Real is an identity operation. 822019316636b0a2d2273b945a98e52d454acee66efTed Kremenek assert (U->getType() == Ex->getType()); 823d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose ProgramStateRef state = (*I)->getState(); 824d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose const LocationContext *LCtx = (*I)->getLocationContext(); 825d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose Bldr.generateNode(U, *I, state->BindExpr(U, LCtx, 826d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose state->getSVal(Ex, LCtx))); 8278ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks break; 828294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 82987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 83087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar case UO_Imag: { 831294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Expr *Ex = U->getSubExpr()->IgnoreParens(); 832c1e08dc876d7944678214f0ba222e258d62c9953Ted Kremenek // FIXME: We don't have complex SValues yet. 833c1e08dc876d7944678214f0ba222e258d62c9953Ted Kremenek if (Ex->getType()->isAnyComplexType()) { 834c1e08dc876d7944678214f0ba222e258d62c9953Ted Kremenek // Just report "Unknown." 835c1e08dc876d7944678214f0ba222e258d62c9953Ted Kremenek break; 836294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 837c1e08dc876d7944678214f0ba222e258d62c9953Ted Kremenek // For all other types, UO_Imag returns 0. 838d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose ProgramStateRef state = (*I)->getState(); 839d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose const LocationContext *LCtx = (*I)->getLocationContext(); 840c1e08dc876d7944678214f0ba222e258d62c9953Ted Kremenek SVal X = svalBuilder.makeZeroVal(Ex->getType()); 841d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose Bldr.generateNode(U, *I, state->BindExpr(U, LCtx, X)); 8428ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks break; 843294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 84487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 845294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_Plus: 846591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks assert(!U->isGLValue()); 847294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // FALL-THROUGH. 848294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_Deref: 849294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_AddrOf: 850294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_Extension: { 851224c48945b1687489a8079fb4fcc42b409823400Ted Kremenek // FIXME: We can probably just have some magic in Environment::getSVal() 852224c48945b1687489a8079fb4fcc42b409823400Ted Kremenek // that propagates values, instead of creating a new node here. 853224c48945b1687489a8079fb4fcc42b409823400Ted Kremenek // 854294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Unary "+" is a no-op, similar to a parentheses. We still have places 855294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // where it may be a block-level expression, so we need to 856294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // generate an extra node that just propagates the value of the 85787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar // subexpression. 858294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Expr *Ex = U->getSubExpr()->IgnoreParens(); 859d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose ProgramStateRef state = (*I)->getState(); 860d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose const LocationContext *LCtx = (*I)->getLocationContext(); 861d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose Bldr.generateNode(U, *I, state->BindExpr(U, LCtx, 862d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose state->getSVal(Ex, LCtx))); 8638ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks break; 864294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 86587d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 866294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_LNot: 867294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_Minus: 868294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek case UO_Not: { 869591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks assert (!U->isGLValue()); 870294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Expr *Ex = U->getSubExpr()->IgnoreParens(); 871d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose ProgramStateRef state = (*I)->getState(); 872d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose const LocationContext *LCtx = (*I)->getLocationContext(); 87387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 874a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek // Get the value of the subexpression. 875a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek SVal V = state->getSVal(Ex, LCtx); 87687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 877a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek if (V.isUnknownOrUndef()) { 878d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose Bldr.generateNode(U, *I, state->BindExpr(U, LCtx, V)); 879a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek break; 880a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek } 88187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 882a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek switch (U->getOpcode()) { 883a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek default: 884a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek llvm_unreachable("Invalid Opcode."); 885a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek case UO_Not: 886a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek // FIXME: Do we need to handle promotions? 8875251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie state = state->BindExpr(U, LCtx, evalComplement(V.castAs<NonLoc>())); 888a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek break; 889a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek case UO_Minus: 890a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek // FIXME: Do we need to handle promotions? 8915251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie state = state->BindExpr(U, LCtx, evalMinus(V.castAs<NonLoc>())); 892a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek break; 893a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek case UO_LNot: 894a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek // C99 6.5.3.3: "The expression !E is equivalent to (0==E)." 895a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek // 896a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek // Note: technically we do "E == 0", but this is the same in the 897a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek // transfer functions as "0 == E". 89887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar SVal Result; 899dc84cd5efdd3430efb22546b4ac656aa0540b210David Blaikie if (Optional<Loc> LV = V.getAs<Loc>()) { 900a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek Loc X = svalBuilder.makeNull(); 9015251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie Result = evalBinOp(state, BO_EQ, *LV, X, U->getType()); 902a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek } 9039195caf28f2a5dcef1e299bf3e5232a018ca1c68Ted Kremenek else if (Ex->getType()->isFloatingType()) { 9049195caf28f2a5dcef1e299bf3e5232a018ca1c68Ted Kremenek // FIXME: handle floating point types. 9059195caf28f2a5dcef1e299bf3e5232a018ca1c68Ted Kremenek Result = UnknownVal(); 9069195caf28f2a5dcef1e299bf3e5232a018ca1c68Ted Kremenek } else { 907a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek nonloc::ConcreteInt X(getBasicVals().getValue(0, Ex->getType())); 9085251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie Result = evalBinOp(state, BO_EQ, V.castAs<NonLoc>(), X, 909a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek U->getType()); 910a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek } 91187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 91287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar state = state->BindExpr(U, LCtx, Result); 913a91ac5bae3944e0eed9ef25294dfb2b8681b8159Ted Kremenek break; 914294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 915d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose Bldr.generateNode(U, *I, state); 9168ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks break; 917294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 918d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose } 919294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 9208ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks 921d7c47d94a55a03aeea14d411768e5593f50445daJordan Rose getCheckerManager().runCheckersForPostStmt(Dst, EvalSet, U, *this); 9228ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks} 9238ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks 9248ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaksvoid ExprEngine::VisitIncrementDecrementOperator(const UnaryOperator* U, 9258ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks ExplodedNode *Pred, 9268ad8c546372fe602708cb7ceeaf0ebbb866735c6Anna Zaks ExplodedNodeSet &Dst) { 927294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Handle ++ and -- (both pre- and post-increment). 928294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek assert (U->isIncrementDecrementOp()); 929294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Expr *Ex = U->getSubExpr()->IgnoreParens(); 93087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9319050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek const LocationContext *LCtx = Pred->getLocationContext(); 9329050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek ProgramStateRef state = Pred->getState(); 9339050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek SVal loc = state->getSVal(Ex, LCtx); 93487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9359050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // Perform a load. 9369050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek ExplodedNodeSet Tmp; 937bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalLoad(Tmp, U, Ex, Pred, state, loc); 93887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9399050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek ExplodedNodeSet Dst2; 94066c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder Bldr(Tmp, Dst2, *currBldrCtx); 9419050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek for (ExplodedNodeSet::iterator I=Tmp.begin(), E=Tmp.end();I!=E;++I) { 94287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9439050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek state = (*I)->getState(); 9449050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek assert(LCtx == (*I)->getLocationContext()); 9459050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek SVal V2_untested = state->getSVal(Ex, LCtx); 94687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9479050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // Propagate unknown and undefined values. 9489050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek if (V2_untested.isUnknownOrUndef()) { 9499050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek Bldr.generateNode(U, *I, state->BindExpr(U, LCtx, V2_untested)); 9509050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek continue; 9519050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek } 9525251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie DefinedSVal V2 = V2_untested.castAs<DefinedSVal>(); 95387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9549050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // Handle all other values. 9559050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek BinaryOperator::Opcode Op = U->isIncrementOp() ? BO_Add : BO_Sub; 95687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9579050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // If the UnaryOperator has non-location type, use its type to create the 9589050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // constant value. If the UnaryOperator has location type, create the 9599050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // constant with int type and pointer width. 9609050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek SVal RHS; 96187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9629050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek if (U->getType()->isAnyPointerType()) 9639050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek RHS = svalBuilder.makeArrayIndex(1); 964d04713598ee8af6e01b925dca4e38bfd78227dadJordan Rose else if (U->getType()->isIntegralOrEnumerationType()) 9659050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek RHS = svalBuilder.makeIntVal(1, U->getType()); 966d04713598ee8af6e01b925dca4e38bfd78227dadJordan Rose else 967d04713598ee8af6e01b925dca4e38bfd78227dadJordan Rose RHS = UnknownVal(); 96887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9699050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek SVal Result = evalBinOp(state, Op, V2, RHS, U->getType()); 97087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9719050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // Conjure a new symbol if necessary to recover precision. 9729050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek if (Result.isUnknown()){ 9739050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek DefinedOrUnknownSVal SymVal = 9746bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines svalBuilder.conjureSymbolVal(nullptr, Ex, LCtx, 9756bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines currBldrCtx->blockCount()); 9769050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek Result = SymVal; 97787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9789050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // If the value is a location, ++/-- should always preserve 9799050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // non-nullness. Check if the original value was non-null, and if so 9809050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // propagate that constraint. 9819050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek if (Loc::isLocType(U->getType())) { 9829050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek DefinedOrUnknownSVal Constraint = 9839050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek svalBuilder.evalEQ(state, V2,svalBuilder.makeZeroVal(U->getType())); 98487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9859050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek if (!state->assume(Constraint, true)) { 9869050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // It isn't feasible for the original value to be null. 9879050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // Propagate this constraint. 9889050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek Constraint = svalBuilder.evalEQ(state, SymVal, 9899050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek svalBuilder.makeZeroVal(U->getType())); 99087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 99187d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9929050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek state = state->assume(Constraint, false); 9939050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek assert(state); 994294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 995294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 996294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 99787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 9989050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // Since the lvalue-to-rvalue conversion is explicit in the AST, 9999050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // we bind an l-value if the operator is prefix and an lvalue (in C++). 1000591b5f53c0e11d87401b4804bb1be1a53f95c619Anna Zaks if (U->isGLValue()) 10019050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek state = state->BindExpr(U, LCtx, loc); 10029050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek else 10039050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek state = state->BindExpr(U, LCtx, U->isPostfix() ? V2 : Result); 100487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar 10059050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek // Perform the store. 10069050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek Bldr.takeNodes(*I); 10079050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek ExplodedNodeSet Dst3; 1008bd613137499b1d4c3b63dccd0aa21f6add243f4fTed Kremenek evalStore(Dst3, U, U, *I, state, loc, Result); 10099050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek Bldr.addNodes(Dst3); 1010294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 10119050e3ad959d08fb53446a5e261e66aaa97d9fc8Ted Kremenek Dst.insert(Dst2); 1012294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 1013