ExprEngineCallAndReturn.cpp revision 70cbf3cc09eb21db1108396d30a414ea66d842cc
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 253070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenekvoid ExprEngine::processCallEnter(CallEnter CE, ExplodedNode *Pred) { 263070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the entry block in the CFG of the callee. 270849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const StackFrameContext *calleeCtx = CE.getCalleeContext(); 280849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const CFG *CalleeCFG = calleeCtx->getCFG(); 293070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Entry = &(CalleeCFG->getEntry()); 303070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 313070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Validate the CFG. 323070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->empty()); 333070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->succ_size() == 1); 343070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 353070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the solitary sucessor. 363070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Succ = *(Entry->succ_begin()); 373070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 383070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct an edge representing the starting location in the callee. 390849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek BlockEdge Loc(Entry, Succ, calleeCtx); 403070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 413070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new state which contains the mapping from actual to 423070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // formal arguments. 430849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const LocationContext *callerCtx = Pred->getLocationContext(); 448bef8238181a30e52dea380789a7e2d760eac532Ted Kremenek ProgramStateRef state = Pred->getState()->enterStackFrame(callerCtx, 4510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek calleeCtx); 463070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 473070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new node and add it to the worklist. 483070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek bool isNew; 493070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek ExplodedNode *Node = G.getNode(Loc, state, false, &isNew); 503070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Node->addPredecessor(Pred, G); 513070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek if (isNew) 523070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Engine.getWorkList()->enqueue(Node); 53294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 54294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 550b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// Find the last statement on the path to the exploded node and the 560b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// corresponding Block. 570b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksstatic std::pair<const Stmt*, 580b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock*> getLastStmt(const ExplodedNode *Node) { 590b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *S = 0; 600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *SF = 620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node->getLocation().getLocationContext()->getCurrentStackFrame(); 63256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek while (Node) { 64256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek const ProgramPoint &PP = Node->getLocation(); 650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Skip any BlockEdges, empty blocks, and the CallExitBegin node. 660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (isa<BlockEdge>(PP) || isa<CallExitBegin>(PP) || isa<BlockEntrance>(PP)){ 67256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek assert(Node->pred_size() == 1); 68256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek Node = *Node->pred_begin(); 69256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek continue; 700b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 710b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we reached the CallEnter, the function has no statements. 720b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (isa<CallEnter>(PP)) 730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 74256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (const StmtPoint *SP = dyn_cast<StmtPoint>(&PP)) { 750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks S = SP->getStmt(); 760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Now, get the enclosing basic block. 770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks while (Node && Node->pred_size() >=1 ) { 780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const ProgramPoint &PP = Node->getLocation(); 790b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (isa<BlockEdge>(PP) && 800b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks (PP.getLocationContext()->getCurrentStackFrame() == SF)) { 810b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks BlockEdge &EPP = cast<BlockEdge>(PP); 820b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Blk = EPP.getDst(); 830b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 840b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 850b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node = *Node->pred_begin(); 860b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 870b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 88256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 89256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek break; 90256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return std::pair<const Stmt*, const CFGBlock*>(S, Blk); 92256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 93256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// The call exit is simulated with a sequence of nodes, which occur between 950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// CallExitBegin and CallExitEnd. The following operations occur between the 960b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// two program points: 970b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 1. CallExitBegin (triggers the start of call exit sequence) 980b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 2. Bind the return value 990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 3. Run Remove dead bindings to clean up the dead symbols from the callee. 1000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 4. CallExitEnd (switch to the caller context) 1010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 5. PostStmt<CallExpr> 1020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::processCallExit(ExplodedNode *CEBNode) { 1030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 1 CEBNode was generated before the call. 1040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *calleeCtx = 1060b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEBNode->getLocationContext()->getCurrentStackFrame(); 1077fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 1087fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // The parent context might not be a stack frame, so make sure we 1097fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // look up the first enclosing stack frame. 1107fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *callerCtx = 1117fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek calleeCtx->getParent()->getCurrentStackFrame(); 1127fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 113294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *CE = calleeCtx->getCallSite(); 1140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramStateRef state = CEBNode->getState(); 1150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Find the last statement in the function and the corresponding basic block. 1160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *LastSt = 0; 1170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 1180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks llvm::tie(LastSt, Blk) = getLastStmt(CEBNode); 1190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1200b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 2: generate node with binded return value: CEBNode -> BindedRetNode. 1210b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 122294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // If the callee returns an expression, bind its value to CallExpr. 1230b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (const ReturnStmt *RS = dyn_cast_or_null<ReturnStmt>(LastSt)) { 1240b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const LocationContext *LCtx = CEBNode->getLocationContext(); 125256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek SVal V = state->getSVal(RS, LCtx); 126256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek state = state->BindExpr(CE, callerCtx, V); 127294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1280b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 129294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Bind the constructed object value to CXXConstructExpr. 130294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 13110f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek loc::MemRegionVal This = 13210f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx); 13310f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek SVal ThisV = state->getSVal(This); 1340b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 135294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Always bind the region to the CXXConstructExpr. 1360b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks state = state->BindExpr(CCE, CEBNode->getLocationContext(), ThisV); 137294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1380b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1390b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks static SimpleProgramPointTag retValBindTag("ExprEngine : Bind Return Value"); 1400b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PostStmt Loc(LastSt, calleeCtx, &retValBindTag); 141894212e9510299abb203801e014fec76b7926a05Ted Kremenek bool isNew; 1420b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNode *BindedRetNode = G.getNode(Loc, state, false, &isNew); 1430b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks BindedRetNode->addPredecessor(CEBNode, G); 144894212e9510299abb203801e014fec76b7926a05Ted Kremenek if (!isNew) 145894212e9510299abb203801e014fec76b7926a05Ted Kremenek return; 1460b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1470b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 3: BindedRetNode -> CleanedNodes 1480b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we can find a statement and a block in the inlined function, run remove 1490b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // dead bindings before returning from the call. This is important to ensure 1500b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // that we report the issues such as leaks in the stack contexts in which 1510b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // they occurred. 1520b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedNodes; 1530b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (LastSt && Blk) { 1540b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(getCoreEngine(), Blk, BindedRetNode); 1550b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = &Ctx; 1560b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Here, we call the Symbol Reaper with 0 statement and caller location 1570b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // context, telling it to clean up everything in the callee's context 1580b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // (and it's children). We use LastStmt as a diagnostic statement, which 1590b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // which the PreStmtPurge Dead point will be associated. 1600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks removeDead(BindedRetNode, CleanedNodes, 0, callerCtx, LastSt, 1610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 1620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = 0; 163144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks } else { 164144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks CleanedNodes.Add(CEBNode); 1650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 1660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1670b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedNodes.begin(), 1680b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedNodes.end(); I != E; ++I) { 1690b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1700b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 4: Generate the CallExit and leave the callee's context. 1710b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CleanedNodes -> CEENode 1720b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CallExitEnd Loc(CE, callerCtx); 1730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks bool isNew; 1740b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNode *CEENode = G.getNode(Loc, (*I)->getState(), false, &isNew); 1750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEENode->addPredecessor(*I, G); 1760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!isNew) 1770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return; 1780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1790b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 5: Perform the post-condition check of the CallExpr and enqueue the 1800b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // result onto the work list. 1810b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CEENode -> Dst -> WorkList 1820b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet Dst; 1830b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(Engine, calleeCtx->getCallSiteBlock(), CEENode); 1840b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<const NodeBuilderContext*> NBCSave(currentBuilderContext, 1850b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks &Ctx); 1860b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<unsigned> CBISave(currentStmtIdx, calleeCtx->getIndex()); 1870b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1880b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks getCheckerManager().runCheckersForPostStmt(Dst, CEENode, CE, *this, true); 1890b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1900b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Enqueue the next element in the block. 1910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator PSI = Dst.begin(), PSE = Dst.end(); 1920b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PSI != PSE; ++PSI) { 1930b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Engine.getWorkList()->enqueue(*PSI, calleeCtx->getCallSiteBlock(), 1940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks calleeCtx->getIndex()+1); 1950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 196242384ddb0e0b65dd7e9e0ac0cf3c31cf98b06a6Ted Kremenek } 197294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 198294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 1990849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenekstatic unsigned getNumberStackFrames(const LocationContext *LCtx) { 2000849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek unsigned count = 0; 2010849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek while (LCtx) { 2020849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek if (isa<StackFrameContext>(LCtx)) 2030849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek ++count; 2040849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek LCtx = LCtx->getParent(); 2050849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek } 2060849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek return count; 2070849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek} 2080849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek 2096cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks// Determine if we should inline the call. 2107fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenekbool ExprEngine::shouldInlineDecl(const Decl *D, ExplodedNode *Pred) { 21169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // FIXME: default constructors don't have bodies. 21269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (!D->hasBody()) 21369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return false; 21469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 2157fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 2166cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 2176cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 21801561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // It is possible that the CFG cannot be constructed. 21901561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // Be safe, and check if the CalleeCFG is valid. 22001561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek if (!CalleeCFG) 22101561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek return false; 22201561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek 2236cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (getNumberStackFrames(Pred->getLocationContext()) 2246cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks == AMgr.InlineMaxStackDepth) 2256cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2266cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 2277fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (Engine.FunctionSummaries->hasReachedMaxBlockCount(D)) 2283bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks return false; 2293bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks 2306cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (CalleeCFG->getNumBlockIDs() > AMgr.InlineMaxFunctionSize) 2316cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2326cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 23310f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek // Do not inline variadic calls (for now). 23410f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) { 23510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (BD->isVariadic()) 23610f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 23710f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek } 23810f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 23910f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (FD->isVariadic()) 24010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 2415903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } 2425903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 243d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // It is possible that the live variables analysis cannot be 244d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // run. If so, bail out. 245d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek if (!CalleeADC->getAnalysis<RelaxedLiveVariables>()) 246d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek return false; 247d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek 24810f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return true; 2495903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks} 2505903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 25169f87c956b3ac2b80124fd9604af012e1061473aJordan Rosebool ExprEngine::inlineCall(ExplodedNodeSet &Dst, 25269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const CallEvent &Call, 253256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNode *Pred) { 25410f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (!getAnalysisManager().shouldInlineCall()) 2555903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return false; 2565903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 2577fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CallerSFC = 2587fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Pred->getLocationContext()->getCurrentStackFrame(); 2597fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 26069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Decl *D = Call.getDecl(); 2617fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const LocationContext *ParentOfCallee = 0; 26269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 26369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose switch (Call.getKind()) { 26469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Function: 26569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_CXXMember: 26669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // These are always at least possible to inline. 26769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 26870cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXConstructor: 26970cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Do not inline constructors until we can model destructors. 27070cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 27170cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 27270cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXAllocator: 27370cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Do not inline allocators until we model deallocators. 27470cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 27570cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 27669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Block: { 27769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDataRegion *BR = cast<BlockCall>(Call).getBlockRegion(); 27869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (!BR) 2797fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 28069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose D = BR->getDecl(); 28169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose AnalysisDeclContext *BlockCtx = AMgr.getAnalysisDeclContext(D); 2827fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = BlockCtx->getBlockInvocationContext(CallerSFC, 28369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose cast<BlockDecl>(D), 2847fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek BR); 28569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 28669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 28769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCMessage: 28869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCPropertyAccess: 28969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // These always use dynamic dispatch; enabling inlining means assuming 29069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // that a particular method will be called at runtime. 2917fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 292256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 2937fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 2947fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (!D || !shouldInlineDecl(D, Pred)) 2957fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 2967fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 2977fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (!ParentOfCallee) 2987fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = CallerSFC; 2997fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 30069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *CallE = Call.getOriginExpr(); 30169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose assert(CallE && "It is not yet possible to have calls without statements"); 30269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 3037fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // Construct a new stack frame for the callee. 3047fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 3057fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CalleeSFC = 30669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CalleeADC->getStackFrame(ParentOfCallee, CallE, 3077fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentBuilderContext->getBlock(), 3087fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentStmtIdx); 3097fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 31069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CallEnter Loc(CallE, CalleeSFC, Pred->getLocationContext()); 3117fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek bool isNew; 31269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (ExplodedNode *N = G.getNode(Loc, Pred->getState(), false, &isNew)) { 3137fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek N->addPredecessor(Pred, G); 3147fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (isNew) 3157fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Engine.getWorkList()->enqueue(N); 3167fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek } 3177fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return true; 318256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 319256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 32069f87c956b3ac2b80124fd9604af012e1061473aJordan Rosestatic ProgramStateRef getInlineFailedState(ExplodedNode *&N, 32169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *CallE) { 3225903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks void *ReplayState = N->getState()->get<ReplayWithoutInlining>(); 3235903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (!ReplayState) 3245903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 32569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *ReplayCallE = reinterpret_cast<const Stmt *>(ReplayState); 32669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (CallE == ReplayCallE) { 3275903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return N->getState()->remove<ReplayWithoutInlining>(); 32810520d76044e8fff71d414f30c21b449fd104960Ted Kremenek } 3295903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 33010520d76044e8fff71d414f30c21b449fd104960Ted Kremenek} 33110520d76044e8fff71d414f30c21b449fd104960Ted Kremenek 332294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred, 333294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &dst) { 334294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Perform the previsit of the CallExpr. 335294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 336294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, CE, *this); 337500abad7edfcc2409b18dd616cdbc28a094926f5Jordy Rose 33869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Get the callee kind. 33969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const CXXMemberCallExpr *MemberCE = dyn_cast<CXXMemberCallExpr>(CE); 34069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose bool IsBlock = (MemberCE ? false 34169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose : CE->getCallee()->getType()->isBlockPointerType()); 34269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 34369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the function call. We try each of the checkers 344294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // to see if the can evaluate the function call. 345294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstCallEvaluated; 34669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 34769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose I != E; ++I) { 34869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose ProgramStateRef State = (*I)->getState(); 34969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const LocationContext *LCtx = (*I)->getLocationContext(); 35069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 35169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the call. 35269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (MemberCE) 35369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose evalCall(dstCallEvaluated, *I, CXXMemberCall(MemberCE, State, LCtx)); 35469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose else if (IsBlock) 35569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose evalCall(dstCallEvaluated, *I, BlockCall(CE, State, LCtx)); 35669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose else 35769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose evalCall(dstCallEvaluated, *I, FunctionCall(CE, State, LCtx)); 35869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 35969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 360294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Finally, perform the post-condition check of the CallExpr and store 361294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // the created nodes in 'Dst'. 36269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Note that if the call was inlined, dstCallEvaluated will be empty. 36369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // The post-CallExpr check will occur in processCallExit. 364294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 365294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek *this); 366294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 367294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 36869f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::evalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 36969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const SimpleCall &Call) { 37096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Run any pre-call checks using the generic call interface. 37196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstPreVisit; 37296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPreCall(dstPreVisit, Pred, Call, *this); 37396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 37496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Actually evaluate the function call. We try each of the checkers 37596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // to see if the can evaluate the function call, and get a callback at 37696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // defaultEvalCall if all of them fail. 37796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstCallEvaluated; 37896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, dstPreVisit, 37996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 38096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 38196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Finally, run any post-call checks. 38296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPostCall(Dst, dstCallEvaluated, 38396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 38469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 38569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 38669f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::defaultEvalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 38769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const CallEvent &Call) { 38869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Try to inline the call. 38969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose ProgramStateRef state = 0; 39069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *E = Call.getOriginExpr(); 39169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (E) { 39269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose state = getInlineFailedState(Pred, E); 39369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (state == 0 && inlineCall(Dst, Call, Pred)) 39469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose return; 39569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 39669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 39769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // If we can't inline it, handle the return value and invalidate the regions. 39869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose StmtNodeBuilder Bldr(Pred, Dst, *currentBuilderContext); 39969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 40069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Invalidate any regions touched by the call. 40169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose unsigned Count = currentBuilderContext->getCurrentBlockCount(); 40269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose if (state == 0) 40369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose state = Pred->getState(); 40469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose state = Call.invalidateRegions(Count, state); 40569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 40669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Conjure a symbol value to use as the result. 40769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose assert(Call.getOriginExpr() && "Must have an expression to bind the result"); 40869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose QualType ResultTy = Call.getResultType(); 40969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose SValBuilder &SVB = getSValBuilder(); 41069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const LocationContext *LCtx = Pred->getLocationContext(); 41169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose SVal RetVal = SVB.getConjuredSymbolVal(0, Call.getOriginExpr(), LCtx, 41269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose ResultTy, Count); 41369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 41469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // And make the result node. 41569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose state = state->BindExpr(Call.getOriginExpr(), LCtx, RetVal); 41669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose Bldr.generateNode(Call.getOriginExpr(), Pred, state); 41769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 41869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 419294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 420294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 421256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 422256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNodeSet dstPreVisit; 423256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, RS, *this); 424256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 425256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek StmtNodeBuilder B(dstPreVisit, Dst, *currentBuilderContext); 426256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 427256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (RS->getRetValue()) { 428256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek for (ExplodedNodeSet::iterator it = dstPreVisit.begin(), 429256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ei = dstPreVisit.end(); it != ei; ++it) { 430256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek B.generateNode(RS, *it, (*it)->getState()); 431294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 432294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 433294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 434