ExprEngineCallAndReturn.cpp revision 8d276d38c258dfc572586daf6c0e8f8fce249c0e
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 14d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek#include "clang/Analysis/Analyses/LiveVariables.h" 15294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/CheckerManager.h" 16294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 17740d490593e0de8732a697c9f77b90ddd463863bJordan Rose#include "clang/StaticAnalyzer/Core/PathSensitive/Calls.h" 18294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/AST/DeclCXX.h" 194a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/ADT/SmallSet.h" 204a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/Support/SaveAndRestore.h" 21294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 22294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace clang; 23294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace ento; 24294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 25fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rosestatic CallEventKind classifyCallExpr(const CallExpr *CE) { 26fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose if (isa<CXXMemberCallExpr>(CE)) 27fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose return CE_CXXMember; 28fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose 29fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose const CXXOperatorCallExpr *OpCE = dyn_cast<CXXOperatorCallExpr>(CE); 30fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose if (OpCE) { 31fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose const FunctionDecl *DirectCallee = CE->getDirectCallee(); 32fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(DirectCallee)) 33fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose if (MD->isInstance()) 34fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose return CE_CXXMemberOperator; 35fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose } else if (CE->getCallee()->getType()->isBlockPointerType()) { 36fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose return CE_Block; 37fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose } 38fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose 39fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose return CE_Function; 40fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose} 41fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose 423070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenekvoid ExprEngine::processCallEnter(CallEnter CE, ExplodedNode *Pred) { 433070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the entry block in the CFG of the callee. 440849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const StackFrameContext *calleeCtx = CE.getCalleeContext(); 450849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const CFG *CalleeCFG = calleeCtx->getCFG(); 463070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Entry = &(CalleeCFG->getEntry()); 473070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 483070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Validate the CFG. 493070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->empty()); 503070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->succ_size() == 1); 513070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 523070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the solitary sucessor. 533070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Succ = *(Entry->succ_begin()); 543070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 553070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct an edge representing the starting location in the callee. 560849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek BlockEdge Loc(Entry, Succ, calleeCtx); 573070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 583070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new state which contains the mapping from actual to 593070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // formal arguments. 600849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const LocationContext *callerCtx = Pred->getLocationContext(); 618bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState()->enterStackFrame(callerCtx, 6210f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek calleeCtx); 633070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 643070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new node and add it to the worklist. 653070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek bool isNew; 663070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek ExplodedNode *Node = G.getNode(Loc, state, false, &isNew); 673070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Node->addPredecessor(Pred, G); 683070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek if (isNew) 693070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Engine.getWorkList()->enqueue(Node); 70294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 71294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 720b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// Find the last statement on the path to the exploded node and the 730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// corresponding Block. 740b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksstatic std::pair<const Stmt*, 750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock*> getLastStmt(const ExplodedNode *Node) { 760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *S = 0; 770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *SF = 790b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node->getLocation().getLocationContext()->getCurrentStackFrame(); 80256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek while (Node) { 81256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek const ProgramPoint &PP = Node->getLocation(); 820b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Skip any BlockEdges, empty blocks, and the CallExitBegin node. 830b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (isa<BlockEdge>(PP) || isa<CallExitBegin>(PP) || isa<BlockEntrance>(PP)){ 84256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek assert(Node->pred_size() == 1); 85256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek Node = *Node->pred_begin(); 86256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek continue; 870b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 880b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we reached the CallEnter, the function has no statements. 890b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (isa<CallEnter>(PP)) 900b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 91256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (const StmtPoint *SP = dyn_cast<StmtPoint>(&PP)) { 920b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks S = SP->getStmt(); 930b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Now, get the enclosing basic block. 940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks while (Node && Node->pred_size() >=1 ) { 950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const ProgramPoint &PP = Node->getLocation(); 960b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (isa<BlockEdge>(PP) && 970b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks (PP.getLocationContext()->getCurrentStackFrame() == SF)) { 980b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks BlockEdge &EPP = cast<BlockEdge>(PP); 990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Blk = EPP.getDst(); 1000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 1010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 1020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node = *Node->pred_begin(); 1030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 1040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 105256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 106256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek break; 107256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 1080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return std::pair<const Stmt*, const CFGBlock*>(S, Blk); 109256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 110256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 1110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// The call exit is simulated with a sequence of nodes, which occur between 1120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// CallExitBegin and CallExitEnd. The following operations occur between the 1130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// two program points: 1140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 1. CallExitBegin (triggers the start of call exit sequence) 1150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 2. Bind the return value 1160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 3. Run Remove dead bindings to clean up the dead symbols from the callee. 1170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 4. CallExitEnd (switch to the caller context) 1180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 5. PostStmt<CallExpr> 1190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::processCallExit(ExplodedNode *CEBNode) { 1200b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 1 CEBNode was generated before the call. 1210b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1220b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *calleeCtx = 1230b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEBNode->getLocationContext()->getCurrentStackFrame(); 1247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 1257fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // The parent context might not be a stack frame, so make sure we 1267fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // look up the first enclosing stack frame. 1277fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *callerCtx = 1287fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek calleeCtx->getParent()->getCurrentStackFrame(); 1297fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 130294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *CE = calleeCtx->getCallSite(); 1310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramStateRef state = CEBNode->getState(); 1320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Find the last statement in the function and the corresponding basic block. 1330b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *LastSt = 0; 1340b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 1350b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks llvm::tie(LastSt, Blk) = getLastStmt(CEBNode); 1360b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1370b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 2: generate node with binded return value: CEBNode -> BindedRetNode. 1380b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 139294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // If the callee returns an expression, bind its value to CallExpr. 1400b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (const ReturnStmt *RS = dyn_cast_or_null<ReturnStmt>(LastSt)) { 1410b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const LocationContext *LCtx = CEBNode->getLocationContext(); 142256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek SVal V = state->getSVal(RS, LCtx); 143256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek state = state->BindExpr(CE, callerCtx, V); 144294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1450b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 146294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Bind the constructed object value to CXXConstructExpr. 147294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 14810f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek loc::MemRegionVal This = 14910f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx); 15010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek SVal ThisV = state->getSVal(This); 1510b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 152294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Always bind the region to the CXXConstructExpr. 1530b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks state = state->BindExpr(CCE, CEBNode->getLocationContext(), ThisV); 154294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1550b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1560b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks static SimpleProgramPointTag retValBindTag("ExprEngine : Bind Return Value"); 1570b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PostStmt Loc(LastSt, calleeCtx, &retValBindTag); 158894212e9510299abb203801e014fec76b7926a05Ted Kremenek bool isNew; 1590b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNode *BindedRetNode = G.getNode(Loc, state, false, &isNew); 1600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks BindedRetNode->addPredecessor(CEBNode, G); 161894212e9510299abb203801e014fec76b7926a05Ted Kremenek if (!isNew) 162894212e9510299abb203801e014fec76b7926a05Ted Kremenek return; 1630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1640b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 3: BindedRetNode -> CleanedNodes 1650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we can find a statement and a block in the inlined function, run remove 1660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // dead bindings before returning from the call. This is important to ensure 1670b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // that we report the issues such as leaks in the stack contexts in which 1680b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // they occurred. 1690b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedNodes; 1700b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (LastSt && Blk) { 1710b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(getCoreEngine(), Blk, BindedRetNode); 1720b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = &Ctx; 1730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Here, we call the Symbol Reaper with 0 statement and caller location 1740b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // context, telling it to clean up everything in the callee's context 1750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // (and it's children). We use LastStmt as a diagnostic statement, which 1760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // which the PreStmtPurge Dead point will be associated. 1770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks removeDead(BindedRetNode, CleanedNodes, 0, callerCtx, LastSt, 1780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 1790b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = 0; 180144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks } else { 181144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks CleanedNodes.Add(CEBNode); 1820b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 1830b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1840b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedNodes.begin(), 1850b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedNodes.end(); I != E; ++I) { 1860b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1870b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 4: Generate the CallExit and leave the callee's context. 1880b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CleanedNodes -> CEENode 1890b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CallExitEnd Loc(CE, callerCtx); 1900b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks bool isNew; 1910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNode *CEENode = G.getNode(Loc, (*I)->getState(), false, &isNew); 1920b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEENode->addPredecessor(*I, G); 1930b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!isNew) 1940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return; 1950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1960b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 5: Perform the post-condition check of the CallExpr and enqueue the 1970b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // result onto the work list. 1980b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CEENode -> Dst -> WorkList 1990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet Dst; 2000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(Engine, calleeCtx->getCallSiteBlock(), CEENode); 2010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<const NodeBuilderContext*> NBCSave(currentBuilderContext, 2020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks &Ctx); 2030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<unsigned> CBISave(currentStmtIdx, calleeCtx->getIndex()); 2040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks getCheckerManager().runCheckersForPostStmt(Dst, CEENode, CE, *this, true); 2060b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Enqueue the next element in the block. 2080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator PSI = Dst.begin(), PSE = Dst.end(); 2090b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PSI != PSE; ++PSI) { 2100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Engine.getWorkList()->enqueue(*PSI, calleeCtx->getCallSiteBlock(), 2110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks calleeCtx->getIndex()+1); 2120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 213242384ddb0e0b65dd7e9e0ac0cf3c31cf98b06a6Ted Kremenek } 214294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 215294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 2160849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenekstatic unsigned getNumberStackFrames(const LocationContext *LCtx) { 2170849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek unsigned count = 0; 2180849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek while (LCtx) { 2190849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek if (isa<StackFrameContext>(LCtx)) 2200849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek ++count; 2210849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek LCtx = LCtx->getParent(); 2220849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek } 2230849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek return count; 2240849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek} 2250849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek 2266cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks// Determine if we should inline the call. 2277fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenekbool ExprEngine::shouldInlineDecl(const Decl *D, ExplodedNode *Pred) { 22869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // FIXME: default constructors don't have bodies. 22969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (!D->hasBody()) 23069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return false; 23169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 2327fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 2336cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 2346cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 23501561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // It is possible that the CFG cannot be constructed. 23601561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // Be safe, and check if the CalleeCFG is valid. 23701561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek if (!CalleeCFG) 23801561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek return false; 23901561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek 2406cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (getNumberStackFrames(Pred->getLocationContext()) 2416cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks == AMgr.InlineMaxStackDepth) 2426cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2436cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 2447fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (Engine.FunctionSummaries->hasReachedMaxBlockCount(D)) 2453bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks return false; 2463bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks 2476cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (CalleeCFG->getNumBlockIDs() > AMgr.InlineMaxFunctionSize) 2486cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2496cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 25010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek // Do not inline variadic calls (for now). 25110f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) { 25210f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (BD->isVariadic()) 25310f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 25410f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek } 25510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 25610f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (FD->isVariadic()) 25710f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 2585903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } 2595903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 260d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // It is possible that the live variables analysis cannot be 261d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // run. If so, bail out. 262d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek if (!CalleeADC->getAnalysis<RelaxedLiveVariables>()) 263d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek return false; 264d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek 26510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return true; 2665903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks} 2675903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 26869f87c956b3ac2b80124fd9604af012e1061473aJordan Rosebool ExprEngine::inlineCall(ExplodedNodeSet &Dst, 26969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const CallEvent &Call, 270256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNode *Pred) { 27110f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (!getAnalysisManager().shouldInlineCall()) 2725903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return false; 2735903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 2747fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CallerSFC = 2757fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Pred->getLocationContext()->getCurrentStackFrame(); 2767fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 277ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose const Decl *D = Call.getDefinition(); 278ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose if (!D) 279ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose return false; 280ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 2817fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const LocationContext *ParentOfCallee = 0; 28269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 28369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose switch (Call.getKind()) { 28469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Function: 28569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_CXXMember: 28669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // These are always at least possible to inline. 28769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 288fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose case CE_CXXMemberOperator: 289fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose // FIXME: This should be possible to inline, but 290fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose // RegionStore::enterStackFrame isn't smart enough to handle the first 291fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose // argument being 'this'. The correct solution is to use CallEvent in 292fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose // enterStackFrame as well. 293fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose return false; 29470cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXConstructor: 2958d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose case CE_CXXDestructor: 2968d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose // Do not inline constructors until we can really model destructors. 29770cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 29870cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 29970cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXAllocator: 30070cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Do not inline allocators until we model deallocators. 30170cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 30270cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 30369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Block: { 30469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDataRegion *BR = cast<BlockCall>(Call).getBlockRegion(); 305ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose assert(BR && "If we have the block definition we should have its region"); 30669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose AnalysisDeclContext *BlockCtx = AMgr.getAnalysisDeclContext(D); 3077fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = BlockCtx->getBlockInvocationContext(CallerSFC, 30869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose cast<BlockDecl>(D), 3097fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek BR); 31069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 31169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 31269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCMessage: 31369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCPropertyAccess: 31469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // These always use dynamic dispatch; enabling inlining means assuming 31569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // that a particular method will be called at runtime. 3167fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 317256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 318ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 319ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose if (!shouldInlineDecl(D, Pred)) 3207fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 3217fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 3227fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (!ParentOfCallee) 3237fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = CallerSFC; 3247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 32569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *CallE = Call.getOriginExpr(); 32669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose assert(CallE && "It is not yet possible to have calls without statements"); 32769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 3287fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // Construct a new stack frame for the callee. 3297fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 3307fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CalleeSFC = 33169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CalleeADC->getStackFrame(ParentOfCallee, CallE, 3327fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentBuilderContext->getBlock(), 3337fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentStmtIdx); 3347fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 33569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CallEnter Loc(CallE, CalleeSFC, Pred->getLocationContext()); 3367fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek bool isNew; 33769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (ExplodedNode *N = G.getNode(Loc, Pred->getState(), false, &isNew)) { 3387fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek N->addPredecessor(Pred, G); 3397fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (isNew) 3407fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Engine.getWorkList()->enqueue(N); 3417fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek } 3427fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return true; 343256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 344256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 34569f87c956b3ac2b80124fd9604af012e1061473aJordan Rosestatic ProgramStateRef getInlineFailedState(ExplodedNode *&N, 34669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *CallE) { 3475903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks void *ReplayState = N->getState()->get<ReplayWithoutInlining>(); 3485903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (!ReplayState) 3495903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 35028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 35128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(ReplayState == (const void*)CallE && "Backtracked to the wrong call."); 35228038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose (void)CallE; 35328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 35428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose return N->getState()->remove<ReplayWithoutInlining>(); 35510520d76044e8fff71d414f30c21b449fd104960Ted Kremenek} 35610520d76044e8fff71d414f30c21b449fd104960Ted Kremenek 357294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred, 358294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &dst) { 359294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Perform the previsit of the CallExpr. 360294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 361294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, CE, *this); 362500abad7edfcc2409b18dd616cdbc28a094926f5Jordy Rose 36369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Get the callee kind. 364fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose CallEventKind K = classifyCallExpr(CE); 36569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 36669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the function call. We try each of the checkers 367294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // to see if the can evaluate the function call. 368294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstCallEvaluated; 36969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 37069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose I != E; ++I) { 37169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose ProgramStateRef State = (*I)->getState(); 37269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const LocationContext *LCtx = (*I)->getLocationContext(); 37369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 37469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the call. 375fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose switch (K) { 376fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose case CE_Function: 37769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose evalCall(dstCallEvaluated, *I, FunctionCall(CE, State, LCtx)); 378fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose break; 379fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose case CE_CXXMember: 380fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose evalCall(dstCallEvaluated, *I, CXXMemberCall(cast<CXXMemberCallExpr>(CE), 381fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose State, LCtx)); 382fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose break; 383fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose case CE_CXXMemberOperator: 384fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose evalCall(dstCallEvaluated, *I, 385fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose CXXMemberOperatorCall(cast<CXXOperatorCallExpr>(CE), 386fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose State, LCtx)); 387fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose break; 388fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose case CE_Block: 389fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose evalCall(dstCallEvaluated, *I, BlockCall(CE, State, LCtx)); 390fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose break; 391fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose default: 392fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose llvm_unreachable("Non-CallExpr CallEventKind"); 393fdaa33818cf9bad8d092136e73bd2e489cb821baJordan Rose } 39469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 39569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 396294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Finally, perform the post-condition check of the CallExpr and store 397294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // the created nodes in 'Dst'. 39869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Note that if the call was inlined, dstCallEvaluated will be empty. 39969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // The post-CallExpr check will occur in processCallExit. 400294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 401294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek *this); 402294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 403294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 40469f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::evalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 40569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const SimpleCall &Call) { 40696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Run any pre-call checks using the generic call interface. 40796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstPreVisit; 40896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPreCall(dstPreVisit, Pred, Call, *this); 40996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 41096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Actually evaluate the function call. We try each of the checkers 41196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // to see if the can evaluate the function call, and get a callback at 41296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // defaultEvalCall if all of them fail. 41396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstCallEvaluated; 41496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, dstPreVisit, 41596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 41696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 41796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Finally, run any post-call checks. 41896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPostCall(Dst, dstCallEvaluated, 41996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 42069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 42169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 42269f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::defaultEvalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 42369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const CallEvent &Call) { 42469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Try to inline the call. 42528038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // The origin expression here is just used as a kind of checksum; 42628038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // for CallEvents that do not have origin expressions, this should still be 42728038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // safe. 42869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *E = Call.getOriginExpr(); 42928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose ProgramStateRef state = getInlineFailedState(Pred, E); 43028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose if (state == 0 && inlineCall(Dst, Call, Pred)) 43128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose return; 43269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 43369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // If we can't inline it, handle the return value and invalidate the regions. 4348d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose NodeBuilder Bldr(Pred, Dst, *currentBuilderContext); 43569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 43669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Invalidate any regions touched by the call. 43769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose unsigned Count = currentBuilderContext->getCurrentBlockCount(); 43869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (state == 0) 43969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose state = Pred->getState(); 44069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose state = Call.invalidateRegions(Count, state); 44169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 44269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Conjure a symbol value to use as the result. 4438d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose if (E) { 4448d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose QualType ResultTy = Call.getResultType(); 4458d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose SValBuilder &SVB = getSValBuilder(); 4468d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 4478d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose SVal RetVal = SVB.getConjuredSymbolVal(0, E, LCtx, ResultTy, Count); 4488d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose 4498d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose state = state->BindExpr(E, LCtx, RetVal); 4508d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose } 45169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 45269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // And make the result node. 4538d276d38c258dfc572586daf6c0e8f8fce249c0eJordan Rose Bldr.generateNode(Call.getProgramPoint(), state, Pred); 45469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 45569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 456294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 457294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 458256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 459256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNodeSet dstPreVisit; 460256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, RS, *this); 461256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 462256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek StmtNodeBuilder B(dstPreVisit, Dst, *currentBuilderContext); 463256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 464256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (RS->getRetValue()) { 465256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek for (ExplodedNodeSet::iterator it = dstPreVisit.begin(), 466256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ei = dstPreVisit.end(); it != ei; ++it) { 467256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek B.generateNode(RS, *it, (*it)->getState()); 468294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 469294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 470294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 471