ExprEngineCallAndReturn.cpp revision 8a660eb1084294a903f6dcc00bf2fa4e3bc92cfc
1294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//=-- ExprEngineCallAndReturn.cpp - Support for call/return -----*- 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 calls and returns. 11294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 12294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//===----------------------------------------------------------------------===// 13294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 14e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks#define DEBUG_TYPE "ExprEngine" 15e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 16294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 1748314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose#include "clang/AST/CXXInheritance.h" 18294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/AST/DeclCXX.h" 196fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose#include "clang/AST/ParentMap.h" 2055fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Analysis/Analyses/LiveVariables.h" 2155fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/StaticAnalyzer/Core/CheckerManager.h" 2255fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" 234a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/ADT/SmallSet.h" 24e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks#include "llvm/ADT/Statistic.h" 254a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/Support/SaveAndRestore.h" 26294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 27294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace clang; 28294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace ento; 29294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 30e90d3f847dcce76237078b67db8895eb7a24189eAnna ZaksSTATISTIC(NumOfDynamicDispatchPathSplits, 31e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks "The # of times we split the path due to imprecise dynamic dispatch info"); 32e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 33210f5a28227c90d739298e3e6729e827858fe397Anna ZaksSTATISTIC(NumInlinedCalls, 34210f5a28227c90d739298e3e6729e827858fe397Anna Zaks "The # of times we inlined a call"); 35210f5a28227c90d739298e3e6729e827858fe397Anna Zaks 367959671d456c916706a5f61af609d8f1fc95decfAnna ZaksSTATISTIC(NumReachedInlineCountMax, 377959671d456c916706a5f61af609d8f1fc95decfAnna Zaks "The # of times we reached inline count maximum"); 387959671d456c916706a5f61af609d8f1fc95decfAnna Zaks 393070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenekvoid ExprEngine::processCallEnter(CallEnter CE, ExplodedNode *Pred) { 403070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the entry block in the CFG of the callee. 410849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const StackFrameContext *calleeCtx = CE.getCalleeContext(); 420849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const CFG *CalleeCFG = calleeCtx->getCFG(); 433070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Entry = &(CalleeCFG->getEntry()); 443070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 453070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Validate the CFG. 463070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->empty()); 473070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->succ_size() == 1); 483070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 493070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the solitary sucessor. 503070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Succ = *(Entry->succ_begin()); 513070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 523070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct an edge representing the starting location in the callee. 530849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek BlockEdge Loc(Entry, Succ, calleeCtx); 543070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 55e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose ProgramStateRef state = Pred->getState(); 563070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 573070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new node and add it to the worklist. 583070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek bool isNew; 593070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek ExplodedNode *Node = G.getNode(Loc, state, false, &isNew); 603070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Node->addPredecessor(Pred, G); 613070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek if (isNew) 623070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Engine.getWorkList()->enqueue(Node); 63294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 64294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// Find the last statement on the path to the exploded node and the 660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// corresponding Block. 670b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksstatic std::pair<const Stmt*, 680b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock*> getLastStmt(const ExplodedNode *Node) { 690b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *S = 0; 704ecca28e20410f5e2816c5ddff5cdeaf45fb74b5Jordan Rose const CFGBlock *Blk = 0; 710b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *SF = 720b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node->getLocation().getLocationContext()->getCurrentStackFrame(); 73888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 74632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // Back up through the ExplodedGraph until we reach a statement node in this 75632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // stack frame. 76256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek while (Node) { 77256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek const ProgramPoint &PP = Node->getLocation(); 78888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 79632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose if (PP.getLocationContext()->getCurrentStackFrame() == SF) { 807a95de68c093991047ed8d339479ccad51b88663David Blaikie if (Optional<StmtPoint> SP = PP.getAs<StmtPoint>()) { 81632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose S = SP->getStmt(); 82888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 837a95de68c093991047ed8d339479ccad51b88663David Blaikie } else if (Optional<CallExitEnd> CEE = PP.getAs<CallExitEnd>()) { 84632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose S = CEE->getCalleeContext()->getCallSite(); 85632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose if (S) 86632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose break; 87632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose 88632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // If there is no statement, this is an implicitly-generated call. 89632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // We'll walk backwards over it and then continue the loop to find 90632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // an actual statement. 917a95de68c093991047ed8d339479ccad51b88663David Blaikie Optional<CallEnter> CE; 92632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose do { 93632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose Node = Node->getFirstPred(); 94632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose CE = Node->getLocationAs<CallEnter>(); 95632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose } while (!CE || CE->getCalleeContext() != CEE->getCalleeContext()); 96632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose 97632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // Continue searching the graph. 987a95de68c093991047ed8d339479ccad51b88663David Blaikie } else if (Optional<BlockEdge> BE = PP.getAs<BlockEdge>()) { 994ecca28e20410f5e2816c5ddff5cdeaf45fb74b5Jordan Rose Blk = BE->getSrc(); 100632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose } 1017a95de68c093991047ed8d339479ccad51b88663David Blaikie } else if (Optional<CallEnter> CE = PP.getAs<CallEnter>()) { 102888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we reached the CallEnter for this function, it has no statements. 103888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (CE->getCalleeContext() == SF) 104888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 105256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 106888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 1078501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks if (Node->pred_empty()) 1080a591c242b867844d483091cae546e294bbee312NAKAMURA Takumi return std::pair<const Stmt*, const CFGBlock*>((Stmt*)0, (CFGBlock*)0); 1098501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks 110888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 111256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 112888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 1130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return std::pair<const Stmt*, const CFGBlock*>(S, Blk); 114256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 115256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 11648314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose/// Adjusts a return value when the called function's return type does not 11748314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose/// match the caller's expression type. This can happen when a dynamic call 11848314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose/// is devirtualized, and the overridding method has a covariant (more specific) 11948314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose/// return type than the parent's method. For C++ objects, this means we need 12048314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose/// to add base casts. 12148314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rosestatic SVal adjustReturnValue(SVal V, QualType ExpectedTy, QualType ActualTy, 12248314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose StoreManager &StoreMgr) { 12348314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // For now, the only adjustments we handle apply only to locations. 1245251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie if (!V.getAs<Loc>()) 12548314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose return V; 12648314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 12748314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // If the types already match, don't do any unnecessary work. 128e7ad14e18247ec6fc3d46b208829e3dac6d85a1dAnna Zaks ExpectedTy = ExpectedTy.getCanonicalType(); 129e7ad14e18247ec6fc3d46b208829e3dac6d85a1dAnna Zaks ActualTy = ActualTy.getCanonicalType(); 13048314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose if (ExpectedTy == ActualTy) 13148314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose return V; 13248314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 13348314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // No adjustment is needed between Objective-C pointer types. 13448314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose if (ExpectedTy->isObjCObjectPointerType() && 13548314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose ActualTy->isObjCObjectPointerType()) 13648314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose return V; 13748314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 13848314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // C++ object pointers may need "derived-to-base" casts. 13948314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose const CXXRecordDecl *ExpectedClass = ExpectedTy->getPointeeCXXRecordDecl(); 14048314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose const CXXRecordDecl *ActualClass = ActualTy->getPointeeCXXRecordDecl(); 14148314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose if (ExpectedClass && ActualClass) { 14248314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, 14348314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose /*DetectVirtual=*/false); 14448314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose if (ActualClass->isDerivedFrom(ExpectedClass, Paths) && 14548314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose !Paths.isAmbiguous(ActualTy->getCanonicalTypeUnqualified())) { 14648314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose return StoreMgr.evalDerivedToBase(V, Paths.front()); 14748314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose } 14848314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose } 14948314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 15048314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // Unfortunately, Objective-C does not enforce that overridden methods have 15148314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // covariant return types, so we can't assert that that never happens. 15248314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // Be safe and return UnknownVal(). 15348314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose return UnknownVal(); 15448314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose} 15548314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 1568501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaksvoid ExprEngine::removeDeadOnEndOfFunction(NodeBuilderContext& BC, 1578501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks ExplodedNode *Pred, 1588501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks ExplodedNodeSet &Dst) { 1598501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks // Find the last statement in the function and the corresponding basic block. 1608501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks const Stmt *LastSt = 0; 1618501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks const CFGBlock *Blk = 0; 1628501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks llvm::tie(LastSt, Blk) = getLastStmt(Pred); 1638501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks if (!Blk || !LastSt) { 16484c484545c5906ba55143e212b4a5275ab55889fJordan Rose Dst.Add(Pred); 1658501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks return; 1668501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks } 1678501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks 16863bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose // Here, we destroy the current location context. We use the current 16963bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose // function's entire body as a diagnostic statement, with which the program 17063bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose // point will be associated. However, we only want to use LastStmt as a 17163bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose // reference for what to clean up if it's a ReturnStmt; otherwise, everything 17263bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose // is dead. 17384c484545c5906ba55143e212b4a5275ab55889fJordan Rose SaveAndRestore<const NodeBuilderContext *> NodeContextRAII(currBldrCtx, &BC); 17463bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 17563bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose removeDead(Pred, Dst, dyn_cast<ReturnStmt>(LastSt), LCtx, 17663bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose LCtx->getAnalysisDeclContext()->getBody(), 1778501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 1788501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks} 1798501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks 180bae930d4c69a624881e66f1628ee615e149362f7Anna Zaksstatic bool wasDifferentDeclUsedForInlining(CallEventRef<> Call, 181d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks const StackFrameContext *calleeCtx) { 182d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks const Decl *RuntimeCallee = calleeCtx->getDecl(); 183d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks const Decl *StaticDecl = Call->getDecl(); 184bae930d4c69a624881e66f1628ee615e149362f7Anna Zaks assert(RuntimeCallee); 185bae930d4c69a624881e66f1628ee615e149362f7Anna Zaks if (!StaticDecl) 186bae930d4c69a624881e66f1628ee615e149362f7Anna Zaks return true; 187d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks return RuntimeCallee->getCanonicalDecl() != StaticDecl->getCanonicalDecl(); 188d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks} 189d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks 190bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose/// Returns true if the CXXConstructExpr \p E was intended to construct a 191bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose/// prvalue for the region in \p V. 192bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose/// 193bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose/// Note that we can't just test for rvalue vs. glvalue because 194bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose/// CXXConstructExprs embedded in DeclStmts and initializers are considered 195bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose/// rvalues by the AST, and the analyzer would like to treat them as lvalues. 196bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rosestatic bool isTemporaryPRValue(const CXXConstructExpr *E, SVal V) { 197bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose if (E->isGLValue()) 198bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose return false; 199bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose 200bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose const MemRegion *MR = V.getAsRegion(); 201bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose if (!MR) 202bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose return false; 203bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose 204bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose return isa<CXXTempObjectRegion>(MR); 205bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose} 206bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose 2070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// The call exit is simulated with a sequence of nodes, which occur between 2080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// CallExitBegin and CallExitEnd. The following operations occur between the 2090b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// two program points: 2100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 1. CallExitBegin (triggers the start of call exit sequence) 2110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 2. Bind the return value 2120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 3. Run Remove dead bindings to clean up the dead symbols from the callee. 2130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 4. CallExitEnd (switch to the caller context) 2140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 5. PostStmt<CallExpr> 2150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::processCallExit(ExplodedNode *CEBNode) { 2160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 1 CEBNode was generated before the call. 2170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *calleeCtx = 2190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEBNode->getLocationContext()->getCurrentStackFrame(); 2207fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 2217fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // The parent context might not be a stack frame, so make sure we 2227fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // look up the first enclosing stack frame. 2237fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *callerCtx = 2247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek calleeCtx->getParent()->getCurrentStackFrame(); 2257fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 226294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *CE = calleeCtx->getCallSite(); 2270b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramStateRef state = CEBNode->getState(); 2280b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Find the last statement in the function and the corresponding basic block. 2290b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *LastSt = 0; 2300b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 2310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks llvm::tie(LastSt, Blk) = getLastStmt(CEBNode); 2320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 23348314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // Generate a CallEvent /before/ cleaning the state, so that we can get the 23448314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose // correct value for 'this' (if necessary). 23548314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 23648314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose CallEventRef<> Call = CEMgr.getCaller(calleeCtx, state); 23748314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 238852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Step 2: generate node with bound return value: CEBNode -> BindedRetNode. 2390b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 240294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // If the callee returns an expression, bind its value to CallExpr. 241852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (CE) { 242852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const ReturnStmt *RS = dyn_cast_or_null<ReturnStmt>(LastSt)) { 243852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose const LocationContext *LCtx = CEBNode->getLocationContext(); 244852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal V = state->getSVal(RS, LCtx); 24548314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 246d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks // Ensure that the return type matches the type of the returned Expr. 247bae930d4c69a624881e66f1628ee615e149362f7Anna Zaks if (wasDifferentDeclUsedForInlining(Call, calleeCtx)) { 248d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks QualType ReturnedTy = 249d51db4935736fd943bfd46dfa74d41e9a3c2d41fAnna Zaks CallEvent::getDeclaredResultType(calleeCtx->getDecl()); 25048314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose if (!ReturnedTy.isNull()) { 25148314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose if (const Expr *Ex = dyn_cast<Expr>(CE)) { 25248314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose V = adjustReturnValue(V, Ex->getType(), ReturnedTy, 25348314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose getStoreManager()); 25448314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose } 25548314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose } 25648314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose } 25748314cf6a289bc5a082d8c769c58a38f924c93b7Jordan Rose 25857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CE, callerCtx, V); 259852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 2600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 261852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Bind the constructed object value to CXXConstructExpr. 262852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 263852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose loc::MemRegionVal This = 264852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx); 265852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal ThisV = state->getSVal(This); 2660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 267bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose // If the constructed object is a temporary prvalue, get its bindings. 268bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose if (isTemporaryPRValue(CCE, ThisV)) 2695251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie ThisV = state->getSVal(ThisV.castAs<Loc>()); 2700504a598a5dc8f3f45e79d4f8ea206a926507859Jordan Rose 27157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CCE, callerCtx, ThisV); 272852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 273294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 2740b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 3: BindedRetNode -> CleanedNodes 2760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we can find a statement and a block in the inlined function, run remove 2770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // dead bindings before returning from the call. This is important to ensure 2780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // that we report the issues such as leaks in the stack contexts in which 2790b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // they occurred. 2800b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedNodes; 281255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if (LastSt && Blk && AMgr.options.AnalysisPurgeOpt != PurgeNone) { 28248b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose static SimpleProgramPointTag retValBind("ExprEngine : Bind Return Value"); 28348b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose PostStmt Loc(LastSt, calleeCtx, &retValBind); 28448b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose bool isNew; 28548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *BindedRetNode = G.getNode(Loc, state, false, &isNew); 28648b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose BindedRetNode->addPredecessor(CEBNode, G); 28748b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose if (!isNew) 28848b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose return; 28948b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose 2900b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(getCoreEngine(), Blk, BindedRetNode); 29166c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = &Ctx; 29284c484545c5906ba55143e212b4a5275ab55889fJordan Rose // Here, we call the Symbol Reaper with 0 statement and callee location 2930b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // context, telling it to clean up everything in the callee's context 29463bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose // (and its children). We use the callee's function body as a diagnostic 29563bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose // statement, with which the program point will be associated. 29663bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose removeDead(BindedRetNode, CleanedNodes, 0, calleeCtx, 29763bc186d6ac0b44ba4ec6fccb5f471b05c79b666Jordan Rose calleeCtx->getAnalysisDeclContext()->getBody(), 2980b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 29966c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = 0; 300144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks } else { 301144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks CleanedNodes.Add(CEBNode); 3020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 3030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedNodes.begin(), 3050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedNodes.end(); I != E; ++I) { 3060b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 4: Generate the CallExit and leave the callee's context. 3080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CleanedNodes -> CEENode 309852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose CallExitEnd Loc(calleeCtx, callerCtx); 3100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks bool isNew; 31148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ProgramStateRef CEEState = (*I == CEBNode) ? state : (*I)->getState(); 31248b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *CEENode = G.getNode(Loc, CEEState, false, &isNew); 3130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEENode->addPredecessor(*I, G); 3140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!isNew) 3150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return; 3160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 5: Perform the post-condition check of the CallExpr and enqueue the 3180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // result onto the work list. 3190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CEENode -> Dst -> WorkList 3200b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(Engine, calleeCtx->getCallSiteBlock(), CEENode); 32166c486f275531df6362b3511fc3af6563561801bTed Kremenek SaveAndRestore<const NodeBuilderContext*> NBCSave(currBldrCtx, 3220b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks &Ctx); 32366c486f275531df6362b3511fc3af6563561801bTed Kremenek SaveAndRestore<unsigned> CBISave(currStmtIdx, calleeCtx->getIndex()); 3240b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3254e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventRef<> UpdatedCall = Call.cloneWithState(CEEState); 32657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 32757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet DstPostCall; 3284e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostCall(DstPostCall, CEENode, 3294e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *UpdatedCall, *this, 3304e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 33157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 33257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet Dst; 3334e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(Call)) { 3344e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostObjCMessage(Dst, DstPostCall, *Msg, 3354e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, 3364e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 33757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else if (CE) { 33857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose getCheckerManager().runCheckersForPostStmt(Dst, DstPostCall, CE, 3394e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, /*WasInlined=*/true); 34057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else { 34157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Dst.insert(DstPostCall); 34257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 3430b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 3440b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Enqueue the next element in the block. 3450b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator PSI = Dst.begin(), PSE = Dst.end(); 3460b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PSI != PSE; ++PSI) { 3470b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Engine.getWorkList()->enqueue(*PSI, calleeCtx->getCallSiteBlock(), 3480b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks calleeCtx->getIndex()+1); 3490b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 350242384ddb0e0b65dd7e9e0ac0cf3c31cf98b06a6Ted Kremenek } 351294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 352294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 3534ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaksvoid ExprEngine::examineStackFrames(const Decl *D, const LocationContext *LCtx, 3547229d0011766c174beffe6a846d78f448f845b39Anna Zaks bool &IsRecursive, unsigned &StackDepth) { 3557229d0011766c174beffe6a846d78f448f845b39Anna Zaks IsRecursive = false; 3567229d0011766c174beffe6a846d78f448f845b39Anna Zaks StackDepth = 0; 3574ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks 3580849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek while (LCtx) { 3597229d0011766c174beffe6a846d78f448f845b39Anna Zaks if (const StackFrameContext *SFC = dyn_cast<StackFrameContext>(LCtx)) { 3604ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks const Decl *DI = SFC->getDecl(); 3614ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks 3624ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks // Mark recursive (and mutually recursive) functions and always count 3634ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks // them when measuring the stack depth. 3644ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks if (DI == D) { 3657229d0011766c174beffe6a846d78f448f845b39Anna Zaks IsRecursive = true; 3664ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks ++StackDepth; 3674ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks LCtx = LCtx->getParent(); 3684ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks continue; 3694ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks } 3704ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks 3714ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks // Do not count the small functions when determining the stack depth. 3724ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(DI); 3734ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 3744ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks if (CalleeCFG->getNumBlockIDs() > AMgr.options.getAlwaysInlineSize()) 3754ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks ++StackDepth; 3767229d0011766c174beffe6a846d78f448f845b39Anna Zaks } 3770849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek LCtx = LCtx->getParent(); 3780849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek } 3794ea9b89ff6dc50d5404eb56cad5e5870bce49ef2Anna Zaks 3800849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek} 3810849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek 38281fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rosestatic bool IsInStdNamespace(const FunctionDecl *FD) { 38381fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose const DeclContext *DC = FD->getEnclosingNamespaceContext(); 38481fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC); 38581fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (!ND) 38681fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose return false; 38781fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 38881fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose while (const DeclContext *Parent = ND->getParent()) { 38981fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (!isa<NamespaceDecl>(Parent)) 39081fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose break; 39181fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose ND = cast<NamespaceDecl>(Parent); 39281fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose } 39381fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 39481fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose return ND->getName() == "std"; 39581fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose} 39681fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 397166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose// The GDM component containing the dynamic dispatch bifurcation info. When 398166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose// the exact type of the receiver is not known, we want to explore both paths - 399166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose// one on which we do inline it and the other one on which we don't. This is 400166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose// done to ensure we do not drop coverage. 401166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose// This is the map from the receiver region to a bool, specifying either we 402166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose// consider this region's information precise or not along the given path. 403166d502d5367ceacd1313a33cac43b1048b8524dJordan Rosenamespace { 404166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose enum DynamicDispatchMode { 405166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose DynamicDispatchModeInlined = 1, 406166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose DynamicDispatchModeConservative 407166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose }; 408166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose} 40940d8551890bc8454c4e0a28c9072c9c1d1dd588aJordan RoseREGISTER_TRAIT_WITH_PROGRAMSTATE(DynamicDispatchBifurcationMap, 41040d8551890bc8454c4e0a28c9072c9c1d1dd588aJordan Rose CLANG_ENTO_PROGRAMSTATE_MAP(const MemRegion *, 41140d8551890bc8454c4e0a28c9072c9c1d1dd588aJordan Rose unsigned)) 412e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 413e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksbool ExprEngine::inlineCall(const CallEvent &Call, const Decl *D, 414e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred, 415e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State) { 416e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(D); 417ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 418c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const LocationContext *CurLC = Pred->getLocationContext(); 419c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const StackFrameContext *CallerSFC = CurLC->getCurrentStackFrame(); 4208dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const LocationContext *ParentOfCallee = CallerSFC; 4218dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (Call.getKind() == CE_Block) { 42269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDataRegion *BR = cast<BlockCall>(Call).getBlockRegion(); 423ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose assert(BR && "If we have the block definition we should have its region"); 42469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose AnalysisDeclContext *BlockCtx = AMgr.getAnalysisDeclContext(D); 4257fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = BlockCtx->getBlockInvocationContext(CallerSFC, 42669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose cast<BlockDecl>(D), 4277fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek BR); 428256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 4297fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 430852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // This may be NULL, but that's fine. 43169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *CallE = Call.getOriginExpr(); 43269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 4337fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // Construct a new stack frame for the callee. 4347fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 4357fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CalleeSFC = 43669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CalleeADC->getStackFrame(ParentOfCallee, CallE, 43766c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->getBlock(), 43866c486f275531df6362b3511fc3af6563561801bTed Kremenek currStmtIdx); 4397fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 4408dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 441c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose CallEnter Loc(CallE, CalleeSFC, CurLC); 442e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 443e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // Construct a new state which contains the mapping from actual to 444e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // formal arguments. 445e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = State->enterStackFrame(Call, CalleeSFC); 446e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 4477fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek bool isNew; 448e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose if (ExplodedNode *N = G.getNode(Loc, State, false, &isNew)) { 4497fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek N->addPredecessor(Pred, G); 4507fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (isNew) 4517fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Engine.getWorkList()->enqueue(N); 4527fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek } 453e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 454e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we decided to inline the call, the successor has been manually 455e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // added onto the work list so remove it from the node builder. 456e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.takeNodes(Pred); 457e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 458210f5a28227c90d739298e3e6729e827858fe397Anna Zaks NumInlinedCalls++; 459210f5a28227c90d739298e3e6729e827858fe397Anna Zaks 460fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks // Mark the decl as visited. 461fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks if (VisitedCallees) 462fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks VisitedCallees->insert(D); 463fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks 4647fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return true; 465256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 466256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 467e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksstatic ProgramStateRef getInlineFailedState(ProgramStateRef State, 46869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *CallE) { 469bdc691f1d61765dd806d5ae3b75ae004f676a7c9Jordan Rose const void *ReplayState = State->get<ReplayWithoutInlining>(); 4705903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (!ReplayState) 4715903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 47228038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 473bdc691f1d61765dd806d5ae3b75ae004f676a7c9Jordan Rose assert(ReplayState == CallE && "Backtracked to the wrong call."); 47428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose (void)CallE; 47528038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 476e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->remove<ReplayWithoutInlining>(); 47710520d76044e8fff71d414f30c21b449fd104960Ted Kremenek} 47810520d76044e8fff71d414f30c21b449fd104960Ted Kremenek 479294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred, 480294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &dst) { 481294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Perform the previsit of the CallExpr. 482294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 483294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, CE, *this); 484500abad7edfcc2409b18dd616cdbc28a094926f5Jordy Rose 485d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Get the call in its initial state. We use this as a template to perform 486d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // all the checks. 487d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 488645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose CallEventRef<> CallTemplate 489d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose = CEMgr.getSimpleCall(CE, Pred->getState(), Pred->getLocationContext()); 49069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 49169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the function call. We try each of the checkers 492294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // to see if the can evaluate the function call. 493294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstCallEvaluated; 49469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 49569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose I != E; ++I) { 496d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose evalCall(dstCallEvaluated, *I, *CallTemplate); 49769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 49869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 499294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Finally, perform the post-condition check of the CallExpr and store 500294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // the created nodes in 'Dst'. 50169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Note that if the call was inlined, dstCallEvaluated will be empty. 50269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // The post-CallExpr check will occur in processCallExit. 503294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 504294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek *this); 505294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 506294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 50769f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::evalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 508645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const CallEvent &Call) { 509d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // WARNING: At this time, the state attached to 'Call' may be older than the 510d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // state in 'Pred'. This is a minor optimization since CheckerManager will 511d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // use an updated CallEvent instance when calling checkers, but if 'Call' is 512d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // ever used directly in this function all callers should be updated to pass 513d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // the most recent state. (It is probably not worth doing the work here since 514d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // for some callers this will not be necessary.) 515d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 51696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Run any pre-call checks using the generic call interface. 51796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstPreVisit; 51896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPreCall(dstPreVisit, Pred, Call, *this); 51996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 52096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Actually evaluate the function call. We try each of the checkers 52196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // to see if the can evaluate the function call, and get a callback at 52296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // defaultEvalCall if all of them fail. 52396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstCallEvaluated; 52496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, dstPreVisit, 52596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 52696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 52796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Finally, run any post-call checks. 52896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPostCall(Dst, dstCallEvaluated, 52996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 53069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 53169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 532e81ce256b62717dd846bd19aecc4115a0dcd4995Anna ZaksProgramStateRef ExprEngine::bindReturnValue(const CallEvent &Call, 533e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const LocationContext *LCtx, 534e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks ProgramStateRef State) { 535e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const Expr *E = Call.getOriginExpr(); 536e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (!E) 537e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State; 538e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 539e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Some method families have known return values. 540e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(&Call)) { 541e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks switch (Msg->getMethodFamily()) { 542e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks default: 543e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks break; 544e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_autorelease: 545e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_retain: 546e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_self: { 547e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // These methods return their receivers. 548e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, Msg->getReceiverSVal()); 549e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 550e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 551e460c46c5d602f65354cab0879c458890273591cJordan Rose } else if (const CXXConstructorCall *C = dyn_cast<CXXConstructorCall>(&Call)){ 552bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose SVal ThisV = C->getCXXThisVal(); 553bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose 554bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose // If the constructed object is a temporary prvalue, get its bindings. 555bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose if (isTemporaryPRValue(cast<CXXConstructExpr>(E), ThisV)) 5565251abea41b446c26e3239c8dd6c7edea6fc335dDavid Blaikie ThisV = State->getSVal(ThisV.castAs<Loc>()); 557bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose 558bc403861bc4e6f7ad1371e9e129f0f25b38b3a9aJordan Rose return State->BindExpr(E, LCtx, ThisV); 559e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 560e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 561e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Conjure a symbol if the return value is unknown. 562e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks QualType ResultTy = Call.getResultType(); 563e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks SValBuilder &SVB = getSValBuilder(); 56466c486f275531df6362b3511fc3af6563561801bTed Kremenek unsigned Count = currBldrCtx->blockCount(); 5653b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek SVal R = SVB.conjureSymbolVal(0, E, LCtx, ResultTy, Count); 566e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, R); 567e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks} 568e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 569e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// Conservatively evaluate call by invalidating regions and binding 570e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// a conjured return value. 571e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::conservativeEvalCall(const CallEvent &Call, NodeBuilder &Bldr, 57242f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks ExplodedNode *Pred, 57342f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks ProgramStateRef State) { 57466c486f275531df6362b3511fc3af6563561801bTed Kremenek State = Call.invalidateRegions(currBldrCtx->blockCount(), State); 575e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = bindReturnValue(Call, Pred->getLocationContext(), State); 576e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 577e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // And make the result node. 578e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.generateNode(Call.getProgramPoint(), State, Pred); 579e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 580e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 5818dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaksstatic bool shouldInlineCallKind(const CallEvent &Call, 58242f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks const ExplodedNode *Pred, 58342f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks AnalyzerOptions &Opts) { 5848dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const LocationContext *CurLC = Pred->getLocationContext(); 5858dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const StackFrameContext *CallerSFC = CurLC->getCurrentStackFrame(); 5868dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks switch (Call.getKind()) { 5878dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_Function: 5888dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_Block: 5898dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks break; 5908dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_CXXMember: 5918dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_CXXMemberOperator: 5928dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Opts.mayInlineCXXMemberFunction(CIMK_MemberFunctions)) 5938dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 5948dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks break; 5958dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_CXXConstructor: { 5968dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Opts.mayInlineCXXMemberFunction(CIMK_Constructors)) 5978dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 5988dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 5998dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const CXXConstructorCall &Ctor = cast<CXXConstructorCall>(Call); 6008dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6018dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // FIXME: We don't handle constructors or destructors for arrays properly. 6028dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const MemRegion *Target = Ctor.getCXXThisVal().getAsRegion(); 6038dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (Target && isa<ElementRegion>(Target)) 6048dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6058dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6068dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // FIXME: This is a hack. We don't use the correct region for a new 6078dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // expression, so if we inline the constructor its result will just be 6088dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // thrown away. This short-term hack is tracked in <rdar://problem/12180598> 6098dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // and the longer-term possible fix is discussed in PR12014. 6108dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const CXXConstructExpr *CtorExpr = Ctor.getOriginExpr(); 6118dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (const Stmt *Parent = CurLC->getParentMap().getParent(CtorExpr)) 6128dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (isa<CXXNewExpr>(Parent)) 6138dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6148dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6158dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Inlining constructors requires including initializers in the CFG. 6168dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 6178dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks assert(ADC->getCFGBuildOptions().AddInitializers && "No CFG initializers"); 6188dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks (void)ADC; 6198dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6208dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // If the destructor is trivial, it's always safe to inline the constructor. 6218dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (Ctor.getDecl()->getParent()->hasTrivialDestructor()) 6228dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks break; 6238dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6248dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // For other types, only inline constructors if destructor inlining is 6258dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // also enabled. 6268dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Opts.mayInlineCXXMemberFunction(CIMK_Destructors)) 6278dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6288dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6298dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // FIXME: This is a hack. We don't handle temporary destructors 6308dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // right now, so we shouldn't inline their constructors. 6318dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (CtorExpr->getConstructionKind() == CXXConstructExpr::CK_Complete) 6328dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Target || !isa<DeclRegion>(Target)) 6338dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6348dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6358dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks break; 6368dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks } 6378dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_CXXDestructor: { 6388dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Opts.mayInlineCXXMemberFunction(CIMK_Destructors)) 6398dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6408dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6418dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Inlining destructors requires building the CFG correctly. 6428dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 6438dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks assert(ADC->getCFGBuildOptions().AddImplicitDtors && "No CFG destructors"); 6448dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks (void)ADC; 6458dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6468dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const CXXDestructorCall &Dtor = cast<CXXDestructorCall>(Call); 6478dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6488dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // FIXME: We don't handle constructors or destructors for arrays properly. 6498dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const MemRegion *Target = Dtor.getCXXThisVal().getAsRegion(); 6508dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (Target && isa<ElementRegion>(Target)) 6518dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6528dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6538dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks break; 6548dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks } 6558dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_CXXAllocator: 6568dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Do not inline allocators until we model deallocators. 6578dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // This is unfortunate, but basically necessary for smart pointers and such. 6588dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6598dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks case CE_ObjCMessage: 6608dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Opts.mayInlineObjCMethod()) 6618dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6628dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!(Opts.getIPAMode() == IPAK_DynamicDispatch || 6638dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks Opts.getIPAMode() == IPAK_DynamicDispatchBifurcate)) 6648dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6658dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks break; 6668dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks } 6678dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return true; 6688dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks} 6698dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6708dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaksbool ExprEngine::shouldInlineCall(const CallEvent &Call, const Decl *D, 6718dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const ExplodedNode *Pred) { 67242f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks if (!D) 6738dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6748dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 67542f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks AnalysisManager &AMgr = getAnalysisManager(); 67642f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks AnalyzerOptions &Opts = AMgr.options; 67742f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks AnalysisDeclContextManager &ADCMgr = AMgr.getAnalysisDeclContextManager(); 67842f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks AnalysisDeclContext *CalleeADC = ADCMgr.getContext(D); 6798dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6808dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // The auto-synthesized bodies are essential to inline as they are 68142f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks // usually small and commonly used. Note: we should do this check early on to 6828dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // ensure we always inline these calls. 6838dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (CalleeADC->isBodyAutosynthesized()) 6848dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return true; 6858dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6868a660eb1084294a903f6dcc00bf2fa4e3bc92cfcAnna Zaks if (!AMgr.shouldInlineCall()) 6878dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6888dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 68942f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks // Check if we should inline a call based on its kind. 6908dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!shouldInlineCallKind(Call, Pred, Opts)) 6918dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6928dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6938dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // It is possible that the CFG cannot be constructed. 6948dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Be safe, and check if the CalleeCFG is valid. 6958dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 6968dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!CalleeCFG) 6978dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 6988dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 6998dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Do not inline if recursive or we've reached max stack frame count. 7008dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks bool IsRecursive = false; 7018dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks unsigned StackDepth = 0; 7028dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks examineStackFrames(D, Pred->getLocationContext(), IsRecursive, StackDepth); 7038dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if ((StackDepth >= Opts.InlineMaxStackDepth) && 7048dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks ((CalleeCFG->getNumBlockIDs() > Opts.getAlwaysInlineSize()) 7058dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks || IsRecursive)) 7068dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 7078dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 7088dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Do not inline if it took too long to inline previously. 7098dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (Engine.FunctionSummaries->hasReachedMaxBlockCount(D)) 7108dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 7118dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 7128dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Or if the function is too big. 7138dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (CalleeCFG->getNumBlockIDs() > Opts.getMaxInlinableSize()) 7148dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 7158dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 7168dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Do not inline variadic calls (for now). 71742f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks if (Call.isVariadic()) 71842f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks return false; 7198dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 7208dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Check our template policy. 7218dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (getContext().getLangOpts().CPlusPlus) { 7228dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 7238dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Conditionally allow the inlining of template functions. 7248dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Opts.mayInlineTemplateFunctions()) 7258dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (FD->getTemplatedKind() != FunctionDecl::TK_NonTemplate) 7268dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 7278dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 7288dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Conditionally allow the inlining of C++ standard library functions. 7298dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!Opts.mayInlineCXXStandardLibrary()) 7308dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (getContext().getSourceManager().isInSystemHeader(FD->getLocation())) 7318dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (IsInStdNamespace(FD)) 7328dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 7338dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks } 7348dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks } 7358dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 7368dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // It is possible that the live variables analysis cannot be 7378dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // run. If so, bail out. 7388dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (!CalleeADC->getAnalysis<RelaxedLiveVariables>()) 7398dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 740453cb859a3c8dcafe79ae840dfc35ff8eae1b4b3Anna Zaks 7418dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks // Do not inline large functions too many times. 74242f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks if ((Engine.FunctionSummaries->getNumTimesInlined(D) > 74342f2309f739549bead6e5a6c34fd1be4d087998fAnna Zaks Opts.getMaxTimesInlineLarge()) && 7448dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks CalleeCFG->getNumBlockIDs() > 13) { 7458dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks NumReachedInlineCountMax++; 7468dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return false; 747453cb859a3c8dcafe79ae840dfc35ff8eae1b4b3Anna Zaks } 7488a660eb1084294a903f6dcc00bf2fa4e3bc92cfcAnna Zaks 7498a660eb1084294a903f6dcc00bf2fa4e3bc92cfcAnna Zaks if (HowToInline == Inline_Minimal && 7508a660eb1084294a903f6dcc00bf2fa4e3bc92cfcAnna Zaks (CalleeCFG->getNumBlockIDs() > Opts.getAlwaysInlineSize() 7518a660eb1084294a903f6dcc00bf2fa4e3bc92cfcAnna Zaks || IsRecursive)) 7528a660eb1084294a903f6dcc00bf2fa4e3bc92cfcAnna Zaks return false; 7538a660eb1084294a903f6dcc00bf2fa4e3bc92cfcAnna Zaks 7548dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks Engine.FunctionSummaries->bumpNumTimesInlined(D); 7558dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks 7568dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks return true; 757453cb859a3c8dcafe79ae840dfc35ff8eae1b4b3Anna Zaks} 758453cb859a3c8dcafe79ae840dfc35ff8eae1b4b3Anna Zaks 759a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rosestatic bool isTrivialObjectAssignment(const CallEvent &Call) { 760a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose const CXXInstanceCall *ICall = dyn_cast<CXXInstanceCall>(&Call); 761a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose if (!ICall) 762a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose return false; 763a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose 764a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(ICall->getDecl()); 765a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose if (!MD) 766a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose return false; 767a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose if (!(MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator())) 768a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose return false; 769a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose 770a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose return MD->isTrivial(); 771a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose} 772a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose 773e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksvoid ExprEngine::defaultEvalCall(NodeBuilder &Bldr, ExplodedNode *Pred, 774d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const CallEvent &CallTemplate) { 775d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Make sure we have the most recent state attached to the call. 776d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef State = Pred->getState(); 777d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventRef<> Call = CallTemplate.cloneWithState(State); 778e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 779a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose // Special-case trivial assignment operators. 780a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose if (isTrivialObjectAssignment(*Call)) { 781a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose performTrivialCopy(Bldr, Pred, *Call); 782a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose return; 783a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose } 784a8d937e4bdd39cdf503f77454e9dc4c9c730a9f7Jordan Rose 78569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Try to inline the call. 78628038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // The origin expression here is just used as a kind of checksum; 787d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // this should still be safe even for CallEvents that don't come from exprs. 788d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const Expr *E = Call->getOriginExpr(); 789d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 7908dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks ProgramStateRef InlinedFailedState = getInlineFailedState(State, E); 791d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (InlinedFailedState) { 792d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // If we already tried once and failed, make sure we don't retry later. 793d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose State = InlinedFailedState; 7945960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } else { 795ddc0c4814788dda4ef224cd4d22d07154a6ede49Ted Kremenek RuntimeDefinition RD = Call->getRuntimeDefinition(); 796fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks const Decl *D = RD.getDecl(); 7978dadf15224f1a8df96793e5fc4e0b0e38a5ffbe4Anna Zaks if (shouldInlineCall(*Call, D, Pred)) { 798b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose if (RD.mayHaveOtherDefinitions()) { 79973f0563009a6715a5d3d41f664f5bfab5096d51fAnna Zaks AnalyzerOptions &Options = getAnalysisManager().options; 80073f0563009a6715a5d3d41f664f5bfab5096d51fAnna Zaks 801b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Explore with and without inlining the call. 802bfa9ab8183e2fdc74f8633d758cb0c6201314320Anna Zaks if (Options.getIPAMode() == IPAK_DynamicDispatchBifurcate) { 803b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurcateCall(RD.getDispatchRegion(), *Call, D, Bldr, Pred); 804b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 805b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose } 806b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 807b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Don't inline if we're not in any dynamic dispatch mode. 808bfa9ab8183e2fdc74f8633d758cb0c6201314320Anna Zaks if (Options.getIPAMode() != IPAK_DynamicDispatch) { 809da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose conservativeEvalCall(*Call, Bldr, Pred, State); 810b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 811da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose } 812e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 813b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 8145960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // We are not bifurcating and we do have a Decl, so just inline. 8155960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(*Call, D, Bldr, Pred, State)) 8165960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 817e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 818e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 81969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 82069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // If we can't inline it, handle the return value and invalidate the regions. 821e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 822e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 82369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 824e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::BifurcateCall(const MemRegion *BifurReg, 825e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks const CallEvent &Call, const Decl *D, 826e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred) { 827e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(BifurReg); 828b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurReg = BifurReg->StripCasts(); 829e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 830e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Check if we've performed the split already - note, we only want 831e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // to split the path once per memory region. 832e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State = Pred->getState(); 833166d502d5367ceacd1313a33cac43b1048b8524dJordan Rose const unsigned *BState = 8346960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->get<DynamicDispatchBifurcationMap>(BifurReg); 8355960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (BState) { 8365960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If we are on "inline path", keep inlining if possible. 8376960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks if (*BState == DynamicDispatchModeInlined) 8385960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(Call, D, Bldr, Pred, State)) 8395960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 8405960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If inline failed, or we are on the path where we assume we 8415960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // don't have enough info about the receiver to inline, conjure the 8425960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // return value and invalidate the regions. 8435960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, State); 8445960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 845e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 846e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 847e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we got here, this is the first time we process a message to this 848e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // region, so split the path. 849e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef IState = 8506960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 8516960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeInlined); 852e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks inlineCall(Call, D, Bldr, Pred, IState); 853e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 854e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef NoIState = 8556960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 8566960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative); 857e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, NoIState); 858e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 859e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NumOfDynamicDispatchPathSplits++; 860e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return; 86169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 86269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 863e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 864294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 865294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 866256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 867256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNodeSet dstPreVisit; 868256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, RS, *this); 869256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 87066c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder B(dstPreVisit, Dst, *currBldrCtx); 871256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 872256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (RS->getRetValue()) { 873256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek for (ExplodedNodeSet::iterator it = dstPreVisit.begin(), 874256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ei = dstPreVisit.end(); it != ei; ++it) { 875256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek B.generateNode(RS, *it, (*it)->getState()); 876294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 877294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 878294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 879