ExprEngineCallAndReturn.cpp revision c568e2f801a62e442cbbd823b71f70175715661f
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 16d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek#include "clang/Analysis/Analyses/LiveVariables.h" 17294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/CheckerManager.h" 18294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 19f540c54701e3eeb34cb619a3a4eb18f1ac70ef2dJordan Rose#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" 20294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/AST/DeclCXX.h" 214a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/ADT/SmallSet.h" 22e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks#include "llvm/ADT/Statistic.h" 234a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/Support/SaveAndRestore.h" 24294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 25294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace clang; 26294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace ento; 27294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 28e90d3f847dcce76237078b67db8895eb7a24189eAnna ZaksSTATISTIC(NumOfDynamicDispatchPathSplits, 29e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks "The # of times we split the path due to imprecise dynamic dispatch info"); 30e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 313070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenekvoid ExprEngine::processCallEnter(CallEnter CE, ExplodedNode *Pred) { 323070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the entry block in the CFG of the callee. 330849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const StackFrameContext *calleeCtx = CE.getCalleeContext(); 340849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const CFG *CalleeCFG = calleeCtx->getCFG(); 353070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Entry = &(CalleeCFG->getEntry()); 363070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 373070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Validate the CFG. 383070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->empty()); 393070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->succ_size() == 1); 403070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 413070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the solitary sucessor. 423070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Succ = *(Entry->succ_begin()); 433070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 443070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct an edge representing the starting location in the callee. 450849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek BlockEdge Loc(Entry, Succ, calleeCtx); 463070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 47e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose ProgramStateRef state = Pred->getState(); 483070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 493070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new node and add it to the worklist. 503070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek bool isNew; 513070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek ExplodedNode *Node = G.getNode(Loc, state, false, &isNew); 523070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Node->addPredecessor(Pred, G); 533070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek if (isNew) 543070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Engine.getWorkList()->enqueue(Node); 55294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 56294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 570b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// Find the last statement on the path to the exploded node and the 580b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// corresponding Block. 590b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksstatic std::pair<const Stmt*, 600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock*> getLastStmt(const ExplodedNode *Node) { 610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *S = 0; 620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *SF = 630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node->getLocation().getLocationContext()->getCurrentStackFrame(); 64888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 65888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Back up through the ExplodedGraph until we reach a statement node. 66256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek while (Node) { 67256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek const ProgramPoint &PP = Node->getLocation(); 68888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 69256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (const StmtPoint *SP = dyn_cast<StmtPoint>(&PP)) { 700b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks S = SP->getStmt(); 710b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 72888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } else if (const CallExitEnd *CEE = dyn_cast<CallExitEnd>(&PP)) { 73888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose S = CEE->getCalleeContext()->getCallSite(); 74888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (S) 75888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 76888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we have an implicit call, we'll probably end up with a 77888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // StmtPoint inside the callee, which is acceptable. 78888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // (It's possible a function ONLY contains implicit calls -- such as an 79888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // implicitly-generated destructor -- so we shouldn't just skip back to 80888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // the CallEnter node and keep going.) 81888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } else if (const CallEnter *CE = dyn_cast<CallEnter>(&PP)) { 82888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we reached the CallEnter for this function, it has no statements. 83888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (CE->getCalleeContext() == SF) 84888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 85256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 86888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 87888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 88256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 89888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 90888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const CFGBlock *Blk = 0; 91888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (S) { 92888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Now, get the enclosing basic block. 93888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose while (Node && Node->pred_size() >=1 ) { 94888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const ProgramPoint &PP = Node->getLocation(); 95888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (isa<BlockEdge>(PP) && 96888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose (PP.getLocationContext()->getCurrentStackFrame() == SF)) { 97888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose BlockEdge &EPP = cast<BlockEdge>(PP); 98888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Blk = EPP.getDst(); 99888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 100888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 101888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 102888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 103888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 104888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 1050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return std::pair<const Stmt*, const CFGBlock*>(S, Blk); 106256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 107256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 1080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// The call exit is simulated with a sequence of nodes, which occur between 1090b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// CallExitBegin and CallExitEnd. The following operations occur between the 1100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// two program points: 1110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 1. CallExitBegin (triggers the start of call exit sequence) 1120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 2. Bind the return value 1130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 3. Run Remove dead bindings to clean up the dead symbols from the callee. 1140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 4. CallExitEnd (switch to the caller context) 1150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 5. PostStmt<CallExpr> 1160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::processCallExit(ExplodedNode *CEBNode) { 1170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 1 CEBNode was generated before the call. 1180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *calleeCtx = 1200b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEBNode->getLocationContext()->getCurrentStackFrame(); 1217fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 1227fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // The parent context might not be a stack frame, so make sure we 1237fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // look up the first enclosing stack frame. 1247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *callerCtx = 1257fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek calleeCtx->getParent()->getCurrentStackFrame(); 1267fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 127294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *CE = calleeCtx->getCallSite(); 1280b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramStateRef state = CEBNode->getState(); 1290b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Find the last statement in the function and the corresponding basic block. 1300b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *LastSt = 0; 1310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 1320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks llvm::tie(LastSt, Blk) = getLastStmt(CEBNode); 1330b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 134852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Step 2: generate node with bound return value: CEBNode -> BindedRetNode. 1350b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 136294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // If the callee returns an expression, bind its value to CallExpr. 137852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (CE) { 138852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const ReturnStmt *RS = dyn_cast_or_null<ReturnStmt>(LastSt)) { 139852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose const LocationContext *LCtx = CEBNode->getLocationContext(); 140852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal V = state->getSVal(RS, LCtx); 14157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CE, callerCtx, V); 142852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 1430b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 144852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Bind the constructed object value to CXXConstructExpr. 145852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 146852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose loc::MemRegionVal This = 147852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx); 148852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal ThisV = state->getSVal(This); 1490b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 150852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Always bind the region to the CXXConstructExpr. 15157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CCE, callerCtx, ThisV); 152852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 153294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1540b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1554e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose // Generate a CallEvent /before/ cleaning the state, so that we can get the 1564e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose // correct value for 'this' (if necessary). 1574e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 1584e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventRef<> Call = CEMgr.getCaller(calleeCtx, state); 1594e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose 1600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 3: BindedRetNode -> CleanedNodes 1610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we can find a statement and a block in the inlined function, run remove 1620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // dead bindings before returning from the call. This is important to ensure 1630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // that we report the issues such as leaks in the stack contexts in which 1640b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // they occurred. 1650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedNodes; 1660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (LastSt && Blk) { 16748b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose static SimpleProgramPointTag retValBind("ExprEngine : Bind Return Value"); 16848b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose PostStmt Loc(LastSt, calleeCtx, &retValBind); 16948b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose bool isNew; 17048b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *BindedRetNode = G.getNode(Loc, state, false, &isNew); 17148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose BindedRetNode->addPredecessor(CEBNode, G); 17248b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose if (!isNew) 17348b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose return; 17448b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose 1750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(getCoreEngine(), Blk, BindedRetNode); 1760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = &Ctx; 1770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Here, we call the Symbol Reaper with 0 statement and caller location 1780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // context, telling it to clean up everything in the callee's context 1790b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // (and it's children). We use LastStmt as a diagnostic statement, which 1800b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // which the PreStmtPurge Dead point will be associated. 1810b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks removeDead(BindedRetNode, CleanedNodes, 0, callerCtx, LastSt, 1820b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 1830b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = 0; 184144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks } else { 185144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks CleanedNodes.Add(CEBNode); 1860b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 1870b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1880b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedNodes.begin(), 1890b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedNodes.end(); I != E; ++I) { 1900b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 4: Generate the CallExit and leave the callee's context. 1920b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CleanedNodes -> CEENode 193852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose CallExitEnd Loc(calleeCtx, callerCtx); 1940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks bool isNew; 19548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ProgramStateRef CEEState = (*I == CEBNode) ? state : (*I)->getState(); 19648b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *CEENode = G.getNode(Loc, CEEState, false, &isNew); 1970b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEENode->addPredecessor(*I, G); 1980b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!isNew) 1990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return; 2000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 5: Perform the post-condition check of the CallExpr and enqueue the 2020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // result onto the work list. 2030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CEENode -> Dst -> WorkList 2040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(Engine, calleeCtx->getCallSiteBlock(), CEENode); 2050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<const NodeBuilderContext*> NBCSave(currentBuilderContext, 2060b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks &Ctx); 2070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<unsigned> CBISave(currentStmtIdx, calleeCtx->getIndex()); 2080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2094e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventRef<> UpdatedCall = Call.cloneWithState(CEEState); 21057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 21157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet DstPostCall; 2124e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostCall(DstPostCall, CEENode, 2134e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *UpdatedCall, *this, 2144e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 21557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 21657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet Dst; 2174e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(Call)) { 2184e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostObjCMessage(Dst, DstPostCall, *Msg, 2194e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, 2204e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 22157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else if (CE) { 22257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose getCheckerManager().runCheckersForPostStmt(Dst, DstPostCall, CE, 2234e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, /*WasInlined=*/true); 22457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else { 22557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Dst.insert(DstPostCall); 22657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 2270b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2280b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Enqueue the next element in the block. 2290b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator PSI = Dst.begin(), PSE = Dst.end(); 2300b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PSI != PSE; ++PSI) { 2310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Engine.getWorkList()->enqueue(*PSI, calleeCtx->getCallSiteBlock(), 2320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks calleeCtx->getIndex()+1); 2330b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 234242384ddb0e0b65dd7e9e0ac0cf3c31cf98b06a6Ted Kremenek } 235294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 236294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 2370849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenekstatic unsigned getNumberStackFrames(const LocationContext *LCtx) { 2380849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek unsigned count = 0; 2390849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek while (LCtx) { 2400849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek if (isa<StackFrameContext>(LCtx)) 2410849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek ++count; 2420849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek LCtx = LCtx->getParent(); 2430849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek } 2440849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek return count; 2450849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek} 2460849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek 2476cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks// Determine if we should inline the call. 2487fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenekbool ExprEngine::shouldInlineDecl(const Decl *D, ExplodedNode *Pred) { 2497fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 2506cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 2516cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 25201561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // It is possible that the CFG cannot be constructed. 25301561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // Be safe, and check if the CalleeCFG is valid. 25401561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek if (!CalleeCFG) 25501561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek return false; 25601561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek 2576cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (getNumberStackFrames(Pred->getLocationContext()) 2586cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks == AMgr.InlineMaxStackDepth) 2596cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2606cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 2617fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (Engine.FunctionSummaries->hasReachedMaxBlockCount(D)) 2623bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks return false; 2633bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks 2646cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (CalleeCFG->getNumBlockIDs() > AMgr.InlineMaxFunctionSize) 2656cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2666cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 26710f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek // Do not inline variadic calls (for now). 26810f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) { 26910f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (BD->isVariadic()) 27010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 27110f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek } 27210f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 27310f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (FD->isVariadic()) 27410f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 2755903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } 2765903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 277d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // It is possible that the live variables analysis cannot be 278d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // run. If so, bail out. 279d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek if (!CalleeADC->getAnalysis<RelaxedLiveVariables>()) 280d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek return false; 281d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek 28210f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return true; 2835903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks} 2845903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 285e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// The GDM component containing the dynamic dispatch bifurcation info. When 286e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// the exact type of the receiver is not known, we want to explore both paths - 287e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// one on which we do inline it and the other one on which we don't. This is 288e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// done to ensure we do not drop coverage. 289e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// This is the map from the receiver region to a bool, specifying either we 290e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// consider this region's information precise or not along the given path. 291e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace clang { 292e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace ento { 2936960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaksenum DynamicDispatchMode { DynamicDispatchModeInlined = 1, 2946960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative }; 2956960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 296e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksstruct DynamicDispatchBifurcationMap {}; 297e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstypedef llvm::ImmutableMap<const MemRegion*, 2986960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks unsigned int> DynamicDispatchBifur; 299e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstemplate<> struct ProgramStateTrait<DynamicDispatchBifurcationMap> 300e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks : public ProgramStatePartialTrait<DynamicDispatchBifur> { 301e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks static void *GDMIndex() { static int index; return &index; } 302e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}; 3036960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 304e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}} 305e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 306c568e2f801a62e442cbbd823b71f70175715661fJordan Rosestatic bool shouldInlineCXX(AnalysisManager &AMgr) { 307c568e2f801a62e442cbbd823b71f70175715661fJordan Rose switch (AMgr.IPAMode) { 308c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case None: 309c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case BasicInlining: 310c568e2f801a62e442cbbd823b71f70175715661fJordan Rose return false; 311c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case Inlining: 312c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case DynamicDispatch: 313c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case DynamicDispatchBifurcate: 314c568e2f801a62e442cbbd823b71f70175715661fJordan Rose return true; 315c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case NumIPAModes: 316c568e2f801a62e442cbbd823b71f70175715661fJordan Rose llvm_unreachable("not actually a valid option"); 317c568e2f801a62e442cbbd823b71f70175715661fJordan Rose } 318c568e2f801a62e442cbbd823b71f70175715661fJordan Rose} 319c568e2f801a62e442cbbd823b71f70175715661fJordan Rose 320e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksbool ExprEngine::inlineCall(const CallEvent &Call, const Decl *D, 321e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred, 322e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State) { 323e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(D); 324ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 325c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const LocationContext *CurLC = Pred->getLocationContext(); 326c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const StackFrameContext *CallerSFC = CurLC->getCurrentStackFrame(); 3277fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const LocationContext *ParentOfCallee = 0; 32869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 329ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: Refactor this check into a hypothetical CallEvent::canInline. 33069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose switch (Call.getKind()) { 33169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Function: 3322f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose break; 33369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_CXXMember: 334e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose case CE_CXXMemberOperator: 335c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3362f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 33769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 338ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXConstructor: { 339c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3402f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3412f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 342da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose // Only inline constructors and destructors if we built the CFGs for them 343da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose // properly. 344da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 345da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose if (!ADC->getCFGBuildOptions().AddImplicitDtors || 346da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose !ADC->getCFGBuildOptions().AddInitializers) 347da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose return false; 3483a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose 349ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXConstructorCall &Ctor = cast<CXXConstructorCall>(Call); 350ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 351e460c46c5d602f65354cab0879c458890273591cJordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 352ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Ctor.getCXXThisVal().getAsRegion(); 353e460c46c5d602f65354cab0879c458890273591cJordan Rose if (Target && isa<ElementRegion>(Target)) 354e460c46c5d602f65354cab0879c458890273591cJordan Rose return false; 355e460c46c5d602f65354cab0879c458890273591cJordan Rose 3563a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // FIXME: This is a hack. We don't handle temporary destructors 357888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // right now, so we shouldn't inline their constructors. 358ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXConstructExpr *CtorExpr = Ctor.getOriginExpr(); 359ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (CtorExpr->getConstructionKind() == CXXConstructExpr::CK_Complete) 360ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!Target || !isa<DeclRegion>(Target)) 361ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 362ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 363ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose break; 364ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 365ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXDestructor: { 366c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3672f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3682f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 369ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // Only inline constructors and destructors if we built the CFGs for them 370ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // properly. 371ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 372ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!ADC->getCFGBuildOptions().AddImplicitDtors || 373ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose !ADC->getCFGBuildOptions().AddInitializers) 374ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 375ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 376ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXDestructorCall &Dtor = cast<CXXDestructorCall>(Call); 377ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 378ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 379ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Dtor.getCXXThisVal().getAsRegion(); 380ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (Target && isa<ElementRegion>(Target)) 381ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 382ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 383da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose break; 384da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose } 38570cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXAllocator: 386c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3872f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3882f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 38970cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Do not inline allocators until we model deallocators. 39070cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 39170cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 39269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Block: { 39369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDataRegion *BR = cast<BlockCall>(Call).getBlockRegion(); 394ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose assert(BR && "If we have the block definition we should have its region"); 39569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose AnalysisDeclContext *BlockCtx = AMgr.getAnalysisDeclContext(D); 3967fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = BlockCtx->getBlockInvocationContext(CallerSFC, 39769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose cast<BlockDecl>(D), 3987fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek BR); 39969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 40069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 40169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCMessage: 402e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks if (!(getAnalysisManager().IPAMode == DynamicDispatch || 403e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks getAnalysisManager().IPAMode == DynamicDispatchBifurcate)) 404e13056a8bb532ddfdc07952a13169aa422bacd3bAnna Zaks return false; 4059dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks break; 406256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 407ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 408ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose if (!shouldInlineDecl(D, Pred)) 4097fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 4107fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 4117fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (!ParentOfCallee) 4127fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = CallerSFC; 4137fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 414852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // This may be NULL, but that's fine. 41569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *CallE = Call.getOriginExpr(); 41669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 4177fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // Construct a new stack frame for the callee. 4187fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 4197fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CalleeSFC = 42069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CalleeADC->getStackFrame(ParentOfCallee, CallE, 4217fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentBuilderContext->getBlock(), 4227fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentStmtIdx); 4237fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 424c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose CallEnter Loc(CallE, CalleeSFC, CurLC); 425e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 426e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // Construct a new state which contains the mapping from actual to 427e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // formal arguments. 428e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = State->enterStackFrame(Call, CalleeSFC); 429e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 4307fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek bool isNew; 431e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose if (ExplodedNode *N = G.getNode(Loc, State, false, &isNew)) { 4327fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek N->addPredecessor(Pred, G); 4337fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (isNew) 4347fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Engine.getWorkList()->enqueue(N); 4357fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek } 436e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 437e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we decided to inline the call, the successor has been manually 438e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // added onto the work list so remove it from the node builder. 439e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.takeNodes(Pred); 440e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 4417fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return true; 442256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 443256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 444e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksstatic ProgramStateRef getInlineFailedState(ProgramStateRef State, 44569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *CallE) { 446e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks void *ReplayState = State->get<ReplayWithoutInlining>(); 4475903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (!ReplayState) 4485903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 44928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 45028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(ReplayState == (const void*)CallE && "Backtracked to the wrong call."); 45128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose (void)CallE; 45228038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 453e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->remove<ReplayWithoutInlining>(); 45410520d76044e8fff71d414f30c21b449fd104960Ted Kremenek} 45510520d76044e8fff71d414f30c21b449fd104960Ted Kremenek 456294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred, 457294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &dst) { 458294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Perform the previsit of the CallExpr. 459294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 460294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, CE, *this); 461500abad7edfcc2409b18dd616cdbc28a094926f5Jordy Rose 462d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Get the call in its initial state. We use this as a template to perform 463d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // all the checks. 464d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 465645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose CallEventRef<> CallTemplate 466d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose = CEMgr.getSimpleCall(CE, Pred->getState(), Pred->getLocationContext()); 46769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 46869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the function call. We try each of the checkers 469294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // to see if the can evaluate the function call. 470294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstCallEvaluated; 47169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 47269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose I != E; ++I) { 473d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose evalCall(dstCallEvaluated, *I, *CallTemplate); 47469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 47569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 476294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Finally, perform the post-condition check of the CallExpr and store 477294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // the created nodes in 'Dst'. 47869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Note that if the call was inlined, dstCallEvaluated will be empty. 47969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // The post-CallExpr check will occur in processCallExit. 480294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 481294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek *this); 482294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 483294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 48469f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::evalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 485645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const CallEvent &Call) { 486d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // WARNING: At this time, the state attached to 'Call' may be older than the 487d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // state in 'Pred'. This is a minor optimization since CheckerManager will 488d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // use an updated CallEvent instance when calling checkers, but if 'Call' is 489d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // ever used directly in this function all callers should be updated to pass 490d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // the most recent state. (It is probably not worth doing the work here since 491d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // for some callers this will not be necessary.) 492d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 49396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Run any pre-call checks using the generic call interface. 49496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstPreVisit; 49596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPreCall(dstPreVisit, Pred, Call, *this); 49696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 49796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Actually evaluate the function call. We try each of the checkers 49896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // to see if the can evaluate the function call, and get a callback at 49996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // defaultEvalCall if all of them fail. 50096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstCallEvaluated; 50196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, dstPreVisit, 50296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 50396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 50496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Finally, run any post-call checks. 50596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPostCall(Dst, dstCallEvaluated, 50696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 50769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 50869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 509e81ce256b62717dd846bd19aecc4115a0dcd4995Anna ZaksProgramStateRef ExprEngine::bindReturnValue(const CallEvent &Call, 510e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const LocationContext *LCtx, 511e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks ProgramStateRef State) { 512e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const Expr *E = Call.getOriginExpr(); 513e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (!E) 514e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State; 515e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 516e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Some method families have known return values. 517e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(&Call)) { 518e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks switch (Msg->getMethodFamily()) { 519e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks default: 520e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks break; 521e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_autorelease: 522e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_retain: 523e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_self: { 524e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // These methods return their receivers. 525e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, Msg->getReceiverSVal()); 526e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 527e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 528e460c46c5d602f65354cab0879c458890273591cJordan Rose } else if (const CXXConstructorCall *C = dyn_cast<CXXConstructorCall>(&Call)){ 529e460c46c5d602f65354cab0879c458890273591cJordan Rose return State->BindExpr(E, LCtx, C->getCXXThisVal()); 530e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 531e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 532e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Conjure a symbol if the return value is unknown. 533e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks QualType ResultTy = Call.getResultType(); 534e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks SValBuilder &SVB = getSValBuilder(); 535e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks unsigned Count = currentBuilderContext->getCurrentBlockCount(); 536e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks SVal R = SVB.getConjuredSymbolVal(0, E, LCtx, ResultTy, Count); 537e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, R); 538e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks} 539e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 540e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// Conservatively evaluate call by invalidating regions and binding 541e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// a conjured return value. 542e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::conservativeEvalCall(const CallEvent &Call, NodeBuilder &Bldr, 543e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ExplodedNode *Pred, ProgramStateRef State) { 544e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks unsigned Count = currentBuilderContext->getCurrentBlockCount(); 545e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = Call.invalidateRegions(Count, State); 546e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = bindReturnValue(Call, Pred->getLocationContext(), State); 547e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 548e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // And make the result node. 549e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.generateNode(Call.getProgramPoint(), State, Pred); 550e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 551e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 552e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksvoid ExprEngine::defaultEvalCall(NodeBuilder &Bldr, ExplodedNode *Pred, 553d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const CallEvent &CallTemplate) { 554d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Make sure we have the most recent state attached to the call. 555d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef State = Pred->getState(); 556d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventRef<> Call = CallTemplate.cloneWithState(State); 557e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 5585960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (!getAnalysisManager().shouldInlineCall()) { 5595960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 5605960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 5615960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } 56269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Try to inline the call. 56328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // The origin expression here is just used as a kind of checksum; 564d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // this should still be safe even for CallEvents that don't come from exprs. 565d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const Expr *E = Call->getOriginExpr(); 566d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef InlinedFailedState = getInlineFailedState(State, E); 567d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 568d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (InlinedFailedState) { 569d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // If we already tried once and failed, make sure we don't retry later. 570d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose State = InlinedFailedState; 5715960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } else { 572e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks RuntimeDefinition RD = Call->getRuntimeDefinition(); 573fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks const Decl *D = RD.getDecl(); 574e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks if (D) { 575b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose if (RD.mayHaveOtherDefinitions()) { 576b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Explore with and without inlining the call. 577b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose if (getAnalysisManager().IPAMode == DynamicDispatchBifurcate) { 578b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurcateCall(RD.getDispatchRegion(), *Call, D, Bldr, Pred); 579b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 580b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose } 581b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 582b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Don't inline if we're not in any dynamic dispatch mode. 583da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose if (getAnalysisManager().IPAMode != DynamicDispatch) { 584da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose conservativeEvalCall(*Call, Bldr, Pred, State); 585b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 586da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose } 587e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 588b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 5895960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // We are not bifurcating and we do have a Decl, so just inline. 5905960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(*Call, D, Bldr, Pred, State)) 5915960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 592e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 593e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 59469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 59569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // If we can't inline it, handle the return value and invalidate the regions. 596e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 597e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 59869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 599e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::BifurcateCall(const MemRegion *BifurReg, 600e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks const CallEvent &Call, const Decl *D, 601e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred) { 602e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(BifurReg); 603b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurReg = BifurReg->StripCasts(); 604e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 605e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Check if we've performed the split already - note, we only want 606e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // to split the path once per memory region. 607e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State = Pred->getState(); 6086960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks const unsigned int *BState = 6096960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->get<DynamicDispatchBifurcationMap>(BifurReg); 6105960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (BState) { 6115960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If we are on "inline path", keep inlining if possible. 6126960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks if (*BState == DynamicDispatchModeInlined) 6135960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(Call, D, Bldr, Pred, State)) 6145960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 6155960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If inline failed, or we are on the path where we assume we 6165960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // don't have enough info about the receiver to inline, conjure the 6175960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // return value and invalidate the regions. 6185960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, State); 6195960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 620e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 621e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 622e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we got here, this is the first time we process a message to this 623e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // region, so split the path. 624e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef IState = 6256960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6266960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeInlined); 627e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks inlineCall(Call, D, Bldr, Pred, IState); 628e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 629e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef NoIState = 6306960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6316960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative); 632e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, NoIState); 633e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 634e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NumOfDynamicDispatchPathSplits++; 635e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return; 63669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 63769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 638e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 639294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 640294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 641256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 642256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNodeSet dstPreVisit; 643256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, RS, *this); 644256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 645256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek StmtNodeBuilder B(dstPreVisit, Dst, *currentBuilderContext); 646256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 647256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (RS->getRetValue()) { 648256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek for (ExplodedNodeSet::iterator it = dstPreVisit.begin(), 649256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ei = dstPreVisit.end(); it != ei; ++it) { 650256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek B.generateNode(RS, *it, (*it)->getState()); 651294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 652294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 653294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 654