ExprEngineCallAndReturn.cpp revision 210f5a28227c90d739298e3e6729e827858fe397
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 31210f5a28227c90d739298e3e6729e827858fe397Anna ZaksSTATISTIC(NumInlinedCalls, 32210f5a28227c90d739298e3e6729e827858fe397Anna Zaks "The # of times we inlined a call"); 33210f5a28227c90d739298e3e6729e827858fe397Anna Zaks 343070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenekvoid ExprEngine::processCallEnter(CallEnter CE, ExplodedNode *Pred) { 353070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the entry block in the CFG of the callee. 360849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const StackFrameContext *calleeCtx = CE.getCalleeContext(); 370849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const CFG *CalleeCFG = calleeCtx->getCFG(); 383070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Entry = &(CalleeCFG->getEntry()); 393070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 403070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Validate the CFG. 413070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->empty()); 423070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->succ_size() == 1); 433070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 443070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the solitary sucessor. 453070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Succ = *(Entry->succ_begin()); 463070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 473070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct an edge representing the starting location in the callee. 480849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek BlockEdge Loc(Entry, Succ, calleeCtx); 493070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 50e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose ProgramStateRef state = Pred->getState(); 513070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 523070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new node and add it to the worklist. 533070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek bool isNew; 543070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek ExplodedNode *Node = G.getNode(Loc, state, false, &isNew); 553070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Node->addPredecessor(Pred, G); 563070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek if (isNew) 573070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Engine.getWorkList()->enqueue(Node); 58294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 59294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// Find the last statement on the path to the exploded node and the 610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// corresponding Block. 620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksstatic std::pair<const Stmt*, 630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock*> getLastStmt(const ExplodedNode *Node) { 640b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *S = 0; 650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *SF = 660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node->getLocation().getLocationContext()->getCurrentStackFrame(); 67888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 68888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Back up through the ExplodedGraph until we reach a statement node. 69256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek while (Node) { 70256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek const ProgramPoint &PP = Node->getLocation(); 71888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 72256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (const StmtPoint *SP = dyn_cast<StmtPoint>(&PP)) { 730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks S = SP->getStmt(); 740b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 75888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } else if (const CallExitEnd *CEE = dyn_cast<CallExitEnd>(&PP)) { 76888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose S = CEE->getCalleeContext()->getCallSite(); 77888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (S) 78888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 79888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we have an implicit call, we'll probably end up with a 80888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // StmtPoint inside the callee, which is acceptable. 81888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // (It's possible a function ONLY contains implicit calls -- such as an 82888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // implicitly-generated destructor -- so we shouldn't just skip back to 83888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // the CallEnter node and keep going.) 84888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } else if (const CallEnter *CE = dyn_cast<CallEnter>(&PP)) { 85888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we reached the CallEnter for this function, it has no statements. 86888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (CE->getCalleeContext() == SF) 87888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 88256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 89888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 90888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 91256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 92888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 93888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const CFGBlock *Blk = 0; 94888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (S) { 95888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Now, get the enclosing basic block. 96888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose while (Node && Node->pred_size() >=1 ) { 97888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const ProgramPoint &PP = Node->getLocation(); 98888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (isa<BlockEdge>(PP) && 99888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose (PP.getLocationContext()->getCurrentStackFrame() == SF)) { 100888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose BlockEdge &EPP = cast<BlockEdge>(PP); 101888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Blk = EPP.getDst(); 102888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 103888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 104888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 105888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 106888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 107888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 1080b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return std::pair<const Stmt*, const CFGBlock*>(S, Blk); 109256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 110256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 1110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// The call exit is simulated with a sequence of nodes, which occur between 1120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// CallExitBegin and CallExitEnd. The following operations occur between the 1130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// two program points: 1140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 1. CallExitBegin (triggers the start of call exit sequence) 1150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 2. Bind the return value 1160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 3. Run Remove dead bindings to clean up the dead symbols from the callee. 1170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 4. CallExitEnd (switch to the caller context) 1180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 5. PostStmt<CallExpr> 1190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::processCallExit(ExplodedNode *CEBNode) { 1200b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 1 CEBNode was generated before the call. 1210b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1220b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *calleeCtx = 1230b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEBNode->getLocationContext()->getCurrentStackFrame(); 1247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 1257fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // The parent context might not be a stack frame, so make sure we 1267fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // look up the first enclosing stack frame. 1277fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *callerCtx = 1287fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek calleeCtx->getParent()->getCurrentStackFrame(); 1297fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 130294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *CE = calleeCtx->getCallSite(); 1310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramStateRef state = CEBNode->getState(); 1320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Find the last statement in the function and the corresponding basic block. 1330b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *LastSt = 0; 1340b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 1350b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks llvm::tie(LastSt, Blk) = getLastStmt(CEBNode); 1360b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 137852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Step 2: generate node with bound return value: CEBNode -> BindedRetNode. 1380b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 139294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // If the callee returns an expression, bind its value to CallExpr. 140852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (CE) { 141852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const ReturnStmt *RS = dyn_cast_or_null<ReturnStmt>(LastSt)) { 142852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose const LocationContext *LCtx = CEBNode->getLocationContext(); 143852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal V = state->getSVal(RS, LCtx); 14457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CE, callerCtx, V); 145852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 1460b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 147852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Bind the constructed object value to CXXConstructExpr. 148852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 149852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose loc::MemRegionVal This = 150852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx); 151852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal ThisV = state->getSVal(This); 1520b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 153852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Always bind the region to the CXXConstructExpr. 15457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CCE, callerCtx, ThisV); 155852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 156294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1570b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1584e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose // Generate a CallEvent /before/ cleaning the state, so that we can get the 1594e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose // correct value for 'this' (if necessary). 1604e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 1614e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventRef<> Call = CEMgr.getCaller(calleeCtx, state); 1624e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose 1630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 3: BindedRetNode -> CleanedNodes 1640b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we can find a statement and a block in the inlined function, run remove 1650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // dead bindings before returning from the call. This is important to ensure 1660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // that we report the issues such as leaks in the stack contexts in which 1670b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // they occurred. 1680b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedNodes; 1690b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (LastSt && Blk) { 17048b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose static SimpleProgramPointTag retValBind("ExprEngine : Bind Return Value"); 17148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose PostStmt Loc(LastSt, calleeCtx, &retValBind); 17248b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose bool isNew; 17348b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *BindedRetNode = G.getNode(Loc, state, false, &isNew); 17448b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose BindedRetNode->addPredecessor(CEBNode, G); 17548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose if (!isNew) 17648b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose return; 17748b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose 1780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(getCoreEngine(), Blk, BindedRetNode); 17966c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = &Ctx; 1800b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Here, we call the Symbol Reaper with 0 statement and caller location 1810b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // context, telling it to clean up everything in the callee's context 1820b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // (and it's children). We use LastStmt as a diagnostic statement, which 1830b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // which the PreStmtPurge Dead point will be associated. 1840b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks removeDead(BindedRetNode, CleanedNodes, 0, callerCtx, LastSt, 1850b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 18666c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = 0; 187144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks } else { 188144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks CleanedNodes.Add(CEBNode); 1890b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 1900b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedNodes.begin(), 1920b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedNodes.end(); I != E; ++I) { 1930b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 4: Generate the CallExit and leave the callee's context. 1950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CleanedNodes -> CEENode 196852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose CallExitEnd Loc(calleeCtx, callerCtx); 1970b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks bool isNew; 19848b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ProgramStateRef CEEState = (*I == CEBNode) ? state : (*I)->getState(); 19948b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *CEENode = G.getNode(Loc, CEEState, false, &isNew); 2000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEENode->addPredecessor(*I, G); 2010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!isNew) 2020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return; 2030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 5: Perform the post-condition check of the CallExpr and enqueue the 2050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // result onto the work list. 2060b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CEENode -> Dst -> WorkList 2070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(Engine, calleeCtx->getCallSiteBlock(), CEENode); 20866c486f275531df6362b3511fc3af6563561801bTed Kremenek SaveAndRestore<const NodeBuilderContext*> NBCSave(currBldrCtx, 2090b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks &Ctx); 21066c486f275531df6362b3511fc3af6563561801bTed Kremenek SaveAndRestore<unsigned> CBISave(currStmtIdx, calleeCtx->getIndex()); 2110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2124e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventRef<> UpdatedCall = Call.cloneWithState(CEEState); 21357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 21457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet DstPostCall; 2154e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostCall(DstPostCall, CEENode, 2164e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *UpdatedCall, *this, 2174e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 21857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 21957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet Dst; 2204e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(Call)) { 2214e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostObjCMessage(Dst, DstPostCall, *Msg, 2224e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, 2234e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 22457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else if (CE) { 22557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose getCheckerManager().runCheckersForPostStmt(Dst, DstPostCall, CE, 2264e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, /*WasInlined=*/true); 22757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else { 22857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Dst.insert(DstPostCall); 22957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 2300b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Enqueue the next element in the block. 2320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator PSI = Dst.begin(), PSE = Dst.end(); 2330b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PSI != PSE; ++PSI) { 2340b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Engine.getWorkList()->enqueue(*PSI, calleeCtx->getCallSiteBlock(), 2350b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks calleeCtx->getIndex()+1); 2360b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 237242384ddb0e0b65dd7e9e0ac0cf3c31cf98b06a6Ted Kremenek } 238294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 239294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 2400849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenekstatic unsigned getNumberStackFrames(const LocationContext *LCtx) { 2410849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek unsigned count = 0; 2420849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek while (LCtx) { 2430849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek if (isa<StackFrameContext>(LCtx)) 2440849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek ++count; 2450849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek LCtx = LCtx->getParent(); 2460849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek } 2470849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek return count; 2480849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek} 2490849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek 2506cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks// Determine if we should inline the call. 2517fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenekbool ExprEngine::shouldInlineDecl(const Decl *D, ExplodedNode *Pred) { 2527fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 2536cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 2546cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 25501561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // It is possible that the CFG cannot be constructed. 25601561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // Be safe, and check if the CalleeCFG is valid. 25701561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek if (!CalleeCFG) 25801561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek return false; 25901561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek 2606cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (getNumberStackFrames(Pred->getLocationContext()) 2616cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks == AMgr.InlineMaxStackDepth) 2626cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2636cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 2647fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (Engine.FunctionSummaries->hasReachedMaxBlockCount(D)) 2653bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks return false; 2663bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks 2676cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (CalleeCFG->getNumBlockIDs() > AMgr.InlineMaxFunctionSize) 2686cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2696cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 27010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek // Do not inline variadic calls (for now). 27110f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) { 27210f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (BD->isVariadic()) 27310f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 27410f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek } 27510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 27610f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (FD->isVariadic()) 27710f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 2785903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } 2795903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 280d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // It is possible that the live variables analysis cannot be 281d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // run. If so, bail out. 282d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek if (!CalleeADC->getAnalysis<RelaxedLiveVariables>()) 283d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek return false; 284d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek 28510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return true; 2865903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks} 2875903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 288e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// The GDM component containing the dynamic dispatch bifurcation info. When 289e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// the exact type of the receiver is not known, we want to explore both paths - 290e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// one on which we do inline it and the other one on which we don't. This is 291e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// done to ensure we do not drop coverage. 292e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// This is the map from the receiver region to a bool, specifying either we 293e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// consider this region's information precise or not along the given path. 294e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace clang { 295e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace ento { 2966960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaksenum DynamicDispatchMode { DynamicDispatchModeInlined = 1, 2976960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative }; 2986960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 299e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksstruct DynamicDispatchBifurcationMap {}; 300e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstypedef llvm::ImmutableMap<const MemRegion*, 3016960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks unsigned int> DynamicDispatchBifur; 302e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstemplate<> struct ProgramStateTrait<DynamicDispatchBifurcationMap> 303e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks : public ProgramStatePartialTrait<DynamicDispatchBifur> { 304e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks static void *GDMIndex() { static int index; return &index; } 305e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}; 3066960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 307e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}} 308e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 309c568e2f801a62e442cbbd823b71f70175715661fJordan Rosestatic bool shouldInlineCXX(AnalysisManager &AMgr) { 310c568e2f801a62e442cbbd823b71f70175715661fJordan Rose switch (AMgr.IPAMode) { 311c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case None: 312c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case BasicInlining: 313c568e2f801a62e442cbbd823b71f70175715661fJordan Rose return false; 314c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case Inlining: 315c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case DynamicDispatch: 316c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case DynamicDispatchBifurcate: 317c568e2f801a62e442cbbd823b71f70175715661fJordan Rose return true; 318c568e2f801a62e442cbbd823b71f70175715661fJordan Rose case NumIPAModes: 319c568e2f801a62e442cbbd823b71f70175715661fJordan Rose llvm_unreachable("not actually a valid option"); 320c568e2f801a62e442cbbd823b71f70175715661fJordan Rose } 32112e2fb0db76ca2705ce5169e04d9cd52762fc685Matt Beaumont-Gay llvm_unreachable("bogus IPAMode"); 322c568e2f801a62e442cbbd823b71f70175715661fJordan Rose} 323c568e2f801a62e442cbbd823b71f70175715661fJordan Rose 324e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksbool ExprEngine::inlineCall(const CallEvent &Call, const Decl *D, 325e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred, 326e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State) { 327e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(D); 328ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 329c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const LocationContext *CurLC = Pred->getLocationContext(); 330c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const StackFrameContext *CallerSFC = CurLC->getCurrentStackFrame(); 3317fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const LocationContext *ParentOfCallee = 0; 33269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 333ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: Refactor this check into a hypothetical CallEvent::canInline. 33469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose switch (Call.getKind()) { 33569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Function: 3362f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose break; 33769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_CXXMember: 338e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose case CE_CXXMemberOperator: 339c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3402f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 34169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 342ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXConstructor: { 343c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3442f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3452f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 346ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXConstructorCall &Ctor = cast<CXXConstructorCall>(Call); 347ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 348e460c46c5d602f65354cab0879c458890273591cJordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 349ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Ctor.getCXXThisVal().getAsRegion(); 350e460c46c5d602f65354cab0879c458890273591cJordan Rose if (Target && isa<ElementRegion>(Target)) 351e460c46c5d602f65354cab0879c458890273591cJordan Rose return false; 352e460c46c5d602f65354cab0879c458890273591cJordan Rose 353c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose // If the destructor is trivial, it's always safe to inline the constructor. 354c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose if (Ctor.getDecl()->getParent()->hasTrivialDestructor()) 355c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose break; 356c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose 357c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose // For other types, only inline constructors if we built the CFGs for the 358c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose // destructor properly. 359c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 360c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose assert(ADC->getCFGBuildOptions().AddInitializers && "No CFG initializers"); 361c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose if (!ADC->getCFGBuildOptions().AddImplicitDtors) 362c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose return false; 363c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose 3643a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // FIXME: This is a hack. We don't handle temporary destructors 365888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // right now, so we shouldn't inline their constructors. 366ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXConstructExpr *CtorExpr = Ctor.getOriginExpr(); 367ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (CtorExpr->getConstructionKind() == CXXConstructExpr::CK_Complete) 368ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!Target || !isa<DeclRegion>(Target)) 369ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 370ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 371ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose break; 372ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 373ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXDestructor: { 374c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3752f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3762f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 377ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // Only inline constructors and destructors if we built the CFGs for them 378ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // properly. 379ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 380c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose if (!ADC->getCFGBuildOptions().AddImplicitDtors) 381ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 382ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 383ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXDestructorCall &Dtor = cast<CXXDestructorCall>(Call); 384ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 385ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 386ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Dtor.getCXXThisVal().getAsRegion(); 387ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (Target && isa<ElementRegion>(Target)) 388ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 389ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 390da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose break; 391da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose } 39270cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXAllocator: 393c568e2f801a62e442cbbd823b71f70175715661fJordan Rose if (!shouldInlineCXX(getAnalysisManager())) 3942f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3952f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 39670cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Do not inline allocators until we model deallocators. 39770cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 39870cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 39969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Block: { 40069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDataRegion *BR = cast<BlockCall>(Call).getBlockRegion(); 401ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose assert(BR && "If we have the block definition we should have its region"); 40269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose AnalysisDeclContext *BlockCtx = AMgr.getAnalysisDeclContext(D); 4037fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = BlockCtx->getBlockInvocationContext(CallerSFC, 40469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose cast<BlockDecl>(D), 4057fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek BR); 40669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 40769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 40869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCMessage: 409e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks if (!(getAnalysisManager().IPAMode == DynamicDispatch || 410e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks getAnalysisManager().IPAMode == DynamicDispatchBifurcate)) 411e13056a8bb532ddfdc07952a13169aa422bacd3bAnna Zaks return false; 4129dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks break; 413256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 414ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 415ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose if (!shouldInlineDecl(D, Pred)) 4167fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 4177fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 4187fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (!ParentOfCallee) 4197fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = CallerSFC; 4207fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 421852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // This may be NULL, but that's fine. 42269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *CallE = Call.getOriginExpr(); 42369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 4247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // Construct a new stack frame for the callee. 4257fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 4267fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CalleeSFC = 42769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CalleeADC->getStackFrame(ParentOfCallee, CallE, 42866c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->getBlock(), 42966c486f275531df6362b3511fc3af6563561801bTed Kremenek currStmtIdx); 4307fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 431c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose CallEnter Loc(CallE, CalleeSFC, CurLC); 432e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 433e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // Construct a new state which contains the mapping from actual to 434e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // formal arguments. 435e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = State->enterStackFrame(Call, CalleeSFC); 436e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 4377fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek bool isNew; 438e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose if (ExplodedNode *N = G.getNode(Loc, State, false, &isNew)) { 4397fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek N->addPredecessor(Pred, G); 4407fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (isNew) 4417fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Engine.getWorkList()->enqueue(N); 4427fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek } 443e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 444e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we decided to inline the call, the successor has been manually 445e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // added onto the work list so remove it from the node builder. 446e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.takeNodes(Pred); 447e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 448210f5a28227c90d739298e3e6729e827858fe397Anna Zaks NumInlinedCalls++; 449210f5a28227c90d739298e3e6729e827858fe397Anna Zaks 4507fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return true; 451256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 452256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 453e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksstatic ProgramStateRef getInlineFailedState(ProgramStateRef State, 45469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *CallE) { 455e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks void *ReplayState = State->get<ReplayWithoutInlining>(); 4565903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (!ReplayState) 4575903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 45828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 45928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(ReplayState == (const void*)CallE && "Backtracked to the wrong call."); 46028038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose (void)CallE; 46128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 462e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->remove<ReplayWithoutInlining>(); 46310520d76044e8fff71d414f30c21b449fd104960Ted Kremenek} 46410520d76044e8fff71d414f30c21b449fd104960Ted Kremenek 465294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred, 466294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &dst) { 467294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Perform the previsit of the CallExpr. 468294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 469294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, CE, *this); 470500abad7edfcc2409b18dd616cdbc28a094926f5Jordy Rose 471d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Get the call in its initial state. We use this as a template to perform 472d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // all the checks. 473d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 474645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose CallEventRef<> CallTemplate 475d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose = CEMgr.getSimpleCall(CE, Pred->getState(), Pred->getLocationContext()); 47669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 47769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the function call. We try each of the checkers 478294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // to see if the can evaluate the function call. 479294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstCallEvaluated; 48069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 48169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose I != E; ++I) { 482d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose evalCall(dstCallEvaluated, *I, *CallTemplate); 48369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 48469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 485294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Finally, perform the post-condition check of the CallExpr and store 486294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // the created nodes in 'Dst'. 48769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Note that if the call was inlined, dstCallEvaluated will be empty. 48869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // The post-CallExpr check will occur in processCallExit. 489294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 490294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek *this); 491294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 492294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 49369f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::evalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 494645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const CallEvent &Call) { 495d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // WARNING: At this time, the state attached to 'Call' may be older than the 496d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // state in 'Pred'. This is a minor optimization since CheckerManager will 497d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // use an updated CallEvent instance when calling checkers, but if 'Call' is 498d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // ever used directly in this function all callers should be updated to pass 499d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // the most recent state. (It is probably not worth doing the work here since 500d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // for some callers this will not be necessary.) 501d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 50296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Run any pre-call checks using the generic call interface. 50396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstPreVisit; 50496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPreCall(dstPreVisit, Pred, Call, *this); 50596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 50696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Actually evaluate the function call. We try each of the checkers 50796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // to see if the can evaluate the function call, and get a callback at 50896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // defaultEvalCall if all of them fail. 50996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstCallEvaluated; 51096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, dstPreVisit, 51196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 51296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 51396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Finally, run any post-call checks. 51496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPostCall(Dst, dstCallEvaluated, 51596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 51669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 51769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 518e81ce256b62717dd846bd19aecc4115a0dcd4995Anna ZaksProgramStateRef ExprEngine::bindReturnValue(const CallEvent &Call, 519e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const LocationContext *LCtx, 520e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks ProgramStateRef State) { 521e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const Expr *E = Call.getOriginExpr(); 522e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (!E) 523e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State; 524e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 525e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Some method families have known return values. 526e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(&Call)) { 527e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks switch (Msg->getMethodFamily()) { 528e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks default: 529e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks break; 530e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_autorelease: 531e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_retain: 532e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_self: { 533e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // These methods return their receivers. 534e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, Msg->getReceiverSVal()); 535e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 536e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 537e460c46c5d602f65354cab0879c458890273591cJordan Rose } else if (const CXXConstructorCall *C = dyn_cast<CXXConstructorCall>(&Call)){ 538e460c46c5d602f65354cab0879c458890273591cJordan Rose return State->BindExpr(E, LCtx, C->getCXXThisVal()); 539e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 540e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 541e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Conjure a symbol if the return value is unknown. 542e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks QualType ResultTy = Call.getResultType(); 543e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks SValBuilder &SVB = getSValBuilder(); 54466c486f275531df6362b3511fc3af6563561801bTed Kremenek unsigned Count = currBldrCtx->blockCount(); 5453b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek SVal R = SVB.conjureSymbolVal(0, E, LCtx, ResultTy, Count); 546e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, R); 547e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks} 548e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 549e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// Conservatively evaluate call by invalidating regions and binding 550e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// a conjured return value. 551e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::conservativeEvalCall(const CallEvent &Call, NodeBuilder &Bldr, 552e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ExplodedNode *Pred, ProgramStateRef State) { 55366c486f275531df6362b3511fc3af6563561801bTed Kremenek State = Call.invalidateRegions(currBldrCtx->blockCount(), State); 554e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = bindReturnValue(Call, Pred->getLocationContext(), State); 555e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 556e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // And make the result node. 557e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.generateNode(Call.getProgramPoint(), State, Pred); 558e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 559e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 560e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksvoid ExprEngine::defaultEvalCall(NodeBuilder &Bldr, ExplodedNode *Pred, 561d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const CallEvent &CallTemplate) { 562d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Make sure we have the most recent state attached to the call. 563d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef State = Pred->getState(); 564d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventRef<> Call = CallTemplate.cloneWithState(State); 565e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 5665960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (!getAnalysisManager().shouldInlineCall()) { 5675960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 5685960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 5695960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } 57069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Try to inline the call. 57128038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // The origin expression here is just used as a kind of checksum; 572d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // this should still be safe even for CallEvents that don't come from exprs. 573d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const Expr *E = Call->getOriginExpr(); 574d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef InlinedFailedState = getInlineFailedState(State, E); 575d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 576d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (InlinedFailedState) { 577d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // If we already tried once and failed, make sure we don't retry later. 578d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose State = InlinedFailedState; 5795960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } else { 580e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks RuntimeDefinition RD = Call->getRuntimeDefinition(); 581fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks const Decl *D = RD.getDecl(); 582e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks if (D) { 583b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose if (RD.mayHaveOtherDefinitions()) { 584b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Explore with and without inlining the call. 585b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose if (getAnalysisManager().IPAMode == DynamicDispatchBifurcate) { 586b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurcateCall(RD.getDispatchRegion(), *Call, D, Bldr, Pred); 587b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 588b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose } 589b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 590b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Don't inline if we're not in any dynamic dispatch mode. 591da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose if (getAnalysisManager().IPAMode != DynamicDispatch) { 592da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose conservativeEvalCall(*Call, Bldr, Pred, State); 593b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 594da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose } 595e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 596b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 5975960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // We are not bifurcating and we do have a Decl, so just inline. 5985960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(*Call, D, Bldr, Pred, State)) 5995960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 600e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 601e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 60269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 60369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // If we can't inline it, handle the return value and invalidate the regions. 604e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 605e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 60669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 607e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::BifurcateCall(const MemRegion *BifurReg, 608e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks const CallEvent &Call, const Decl *D, 609e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred) { 610e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(BifurReg); 611b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurReg = BifurReg->StripCasts(); 612e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 613e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Check if we've performed the split already - note, we only want 614e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // to split the path once per memory region. 615e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State = Pred->getState(); 6166960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks const unsigned int *BState = 6176960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->get<DynamicDispatchBifurcationMap>(BifurReg); 6185960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (BState) { 6195960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If we are on "inline path", keep inlining if possible. 6206960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks if (*BState == DynamicDispatchModeInlined) 6215960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(Call, D, Bldr, Pred, State)) 6225960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 6235960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If inline failed, or we are on the path where we assume we 6245960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // don't have enough info about the receiver to inline, conjure the 6255960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // return value and invalidate the regions. 6265960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, State); 6275960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 628e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 629e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 630e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we got here, this is the first time we process a message to this 631e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // region, so split the path. 632e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef IState = 6336960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6346960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeInlined); 635e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks inlineCall(Call, D, Bldr, Pred, IState); 636e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 637e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef NoIState = 6386960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6396960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative); 640e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, NoIState); 641e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 642e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NumOfDynamicDispatchPathSplits++; 643e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return; 64469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 64569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 646e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 647294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 648294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 649256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 650256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNodeSet dstPreVisit; 651256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, RS, *this); 652256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 65366c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder B(dstPreVisit, Dst, *currBldrCtx); 654256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 655256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (RS->getRetValue()) { 656256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek for (ExplodedNodeSet::iterator it = dstPreVisit.begin(), 657256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ei = dstPreVisit.end(); it != ei; ++it) { 658256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek B.generateNode(RS, *it, (*it)->getState()); 659294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 660294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 661294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 662