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" 216fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose#include "clang/AST/ParentMap.h" 224a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/ADT/SmallSet.h" 23e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks#include "llvm/ADT/Statistic.h" 244a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/Support/SaveAndRestore.h" 25294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 26294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace clang; 27294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace ento; 28294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 29e90d3f847dcce76237078b67db8895eb7a24189eAnna ZaksSTATISTIC(NumOfDynamicDispatchPathSplits, 30e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks "The # of times we split the path due to imprecise dynamic dispatch info"); 31e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 32210f5a28227c90d739298e3e6729e827858fe397Anna ZaksSTATISTIC(NumInlinedCalls, 33210f5a28227c90d739298e3e6729e827858fe397Anna Zaks "The # of times we inlined a call"); 34210f5a28227c90d739298e3e6729e827858fe397Anna Zaks 353070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenekvoid ExprEngine::processCallEnter(CallEnter CE, ExplodedNode *Pred) { 363070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the entry block in the CFG of the callee. 370849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const StackFrameContext *calleeCtx = CE.getCalleeContext(); 380849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const CFG *CalleeCFG = calleeCtx->getCFG(); 393070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Entry = &(CalleeCFG->getEntry()); 403070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 413070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Validate the CFG. 423070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->empty()); 433070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->succ_size() == 1); 443070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 453070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the solitary sucessor. 463070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Succ = *(Entry->succ_begin()); 473070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 483070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct an edge representing the starting location in the callee. 490849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek BlockEdge Loc(Entry, Succ, calleeCtx); 503070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 51e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose ProgramStateRef state = Pred->getState(); 523070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 533070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new node and add it to the worklist. 543070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek bool isNew; 553070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek ExplodedNode *Node = G.getNode(Loc, state, false, &isNew); 563070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Node->addPredecessor(Pred, G); 573070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek if (isNew) 583070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Engine.getWorkList()->enqueue(Node); 59294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 60294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// Find the last statement on the path to the exploded node and the 620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// corresponding Block. 630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksstatic std::pair<const Stmt*, 640b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock*> getLastStmt(const ExplodedNode *Node) { 650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *S = 0; 660b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *SF = 670b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node->getLocation().getLocationContext()->getCurrentStackFrame(); 68888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 69632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // Back up through the ExplodedGraph until we reach a statement node in this 70632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // stack frame. 71256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek while (Node) { 72256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek const ProgramPoint &PP = Node->getLocation(); 73888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 74632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose if (PP.getLocationContext()->getCurrentStackFrame() == SF) { 75632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose if (const StmtPoint *SP = dyn_cast<StmtPoint>(&PP)) { 76632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose S = SP->getStmt(); 77888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 78632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose } else if (const CallExitEnd *CEE = dyn_cast<CallExitEnd>(&PP)) { 79632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose S = CEE->getCalleeContext()->getCallSite(); 80632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose if (S) 81632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose break; 82632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose 83632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // If there is no statement, this is an implicitly-generated call. 84632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // We'll walk backwards over it and then continue the loop to find 85632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // an actual statement. 86632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose const CallEnter *CE; 87632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose do { 88632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose Node = Node->getFirstPred(); 89632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose CE = Node->getLocationAs<CallEnter>(); 90632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose } while (!CE || CE->getCalleeContext() != CEE->getCalleeContext()); 91632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose 92632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose // Continue searching the graph. 93632e5022f68fcae3b68bbc90538a60f3ba20229fJordan Rose } 94888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } else if (const CallEnter *CE = dyn_cast<CallEnter>(&PP)) { 95888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we reached the CallEnter for this function, it has no statements. 96888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (CE->getCalleeContext() == SF) 97888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 98256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 99888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 100888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 101256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 102888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 103888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const CFGBlock *Blk = 0; 104888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (S) { 105888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Now, get the enclosing basic block. 106888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose while (Node && Node->pred_size() >=1 ) { 107888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const ProgramPoint &PP = Node->getLocation(); 108888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (isa<BlockEdge>(PP) && 109888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose (PP.getLocationContext()->getCurrentStackFrame() == SF)) { 110888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose BlockEdge &EPP = cast<BlockEdge>(PP); 111888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Blk = EPP.getDst(); 112888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 113888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 114888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 115888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 116888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 117888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 1180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return std::pair<const Stmt*, const CFGBlock*>(S, Blk); 119256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 120256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 1210b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// The call exit is simulated with a sequence of nodes, which occur between 1220b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// CallExitBegin and CallExitEnd. The following operations occur between the 1230b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// two program points: 1240b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 1. CallExitBegin (triggers the start of call exit sequence) 1250b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 2. Bind the return value 1260b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 3. Run Remove dead bindings to clean up the dead symbols from the callee. 1270b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 4. CallExitEnd (switch to the caller context) 1280b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 5. PostStmt<CallExpr> 1290b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::processCallExit(ExplodedNode *CEBNode) { 1300b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 1 CEBNode was generated before the call. 1310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *calleeCtx = 1330b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEBNode->getLocationContext()->getCurrentStackFrame(); 1347fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 1357fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // The parent context might not be a stack frame, so make sure we 1367fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // look up the first enclosing stack frame. 1377fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *callerCtx = 1387fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek calleeCtx->getParent()->getCurrentStackFrame(); 1397fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 140294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *CE = calleeCtx->getCallSite(); 1410b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramStateRef state = CEBNode->getState(); 1420b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Find the last statement in the function and the corresponding basic block. 1430b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *LastSt = 0; 1440b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 1450b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks llvm::tie(LastSt, Blk) = getLastStmt(CEBNode); 1460b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 147852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Step 2: generate node with bound return value: CEBNode -> BindedRetNode. 1480b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 149294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // If the callee returns an expression, bind its value to CallExpr. 150852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (CE) { 151852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const ReturnStmt *RS = dyn_cast_or_null<ReturnStmt>(LastSt)) { 152852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose const LocationContext *LCtx = CEBNode->getLocationContext(); 153852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal V = state->getSVal(RS, LCtx); 15457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CE, callerCtx, V); 155852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 1560b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 157852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Bind the constructed object value to CXXConstructExpr. 158852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 159852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose loc::MemRegionVal This = 160852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx); 161852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal ThisV = state->getSVal(This); 1620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 163852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Always bind the region to the CXXConstructExpr. 16457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CCE, callerCtx, ThisV); 165852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 166294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1670b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1684e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose // Generate a CallEvent /before/ cleaning the state, so that we can get the 1694e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose // correct value for 'this' (if necessary). 1704e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 1714e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventRef<> Call = CEMgr.getCaller(calleeCtx, state); 1724e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose 1730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 3: BindedRetNode -> CleanedNodes 1740b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we can find a statement and a block in the inlined function, run remove 1750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // dead bindings before returning from the call. This is important to ensure 1760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // that we report the issues such as leaks in the stack contexts in which 1770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // they occurred. 1780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedNodes; 179255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if (LastSt && Blk && AMgr.options.AnalysisPurgeOpt != PurgeNone) { 18048b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose static SimpleProgramPointTag retValBind("ExprEngine : Bind Return Value"); 18148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose PostStmt Loc(LastSt, calleeCtx, &retValBind); 18248b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose bool isNew; 18348b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *BindedRetNode = G.getNode(Loc, state, false, &isNew); 18448b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose BindedRetNode->addPredecessor(CEBNode, G); 18548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose if (!isNew) 18648b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose return; 18748b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose 1880b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(getCoreEngine(), Blk, BindedRetNode); 18966c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = &Ctx; 1900b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Here, we call the Symbol Reaper with 0 statement and caller location 1910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // context, telling it to clean up everything in the callee's context 1920b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // (and it's children). We use LastStmt as a diagnostic statement, which 1930b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // which the PreStmtPurge Dead point will be associated. 1940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks removeDead(BindedRetNode, CleanedNodes, 0, callerCtx, LastSt, 1950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 19666c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx = 0; 197144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks } else { 198144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks CleanedNodes.Add(CEBNode); 1990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 2000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedNodes.begin(), 2020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedNodes.end(); I != E; ++I) { 2030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 4: Generate the CallExit and leave the callee's context. 2050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CleanedNodes -> CEENode 206852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose CallExitEnd Loc(calleeCtx, callerCtx); 2070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks bool isNew; 20848b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ProgramStateRef CEEState = (*I == CEBNode) ? state : (*I)->getState(); 20948b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *CEENode = G.getNode(Loc, CEEState, false, &isNew); 2100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEENode->addPredecessor(*I, G); 2110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!isNew) 2120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return; 2130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 5: Perform the post-condition check of the CallExpr and enqueue the 2150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // result onto the work list. 2160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CEENode -> Dst -> WorkList 2170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(Engine, calleeCtx->getCallSiteBlock(), CEENode); 21866c486f275531df6362b3511fc3af6563561801bTed Kremenek SaveAndRestore<const NodeBuilderContext*> NBCSave(currBldrCtx, 2190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks &Ctx); 22066c486f275531df6362b3511fc3af6563561801bTed Kremenek SaveAndRestore<unsigned> CBISave(currStmtIdx, calleeCtx->getIndex()); 2210b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2224e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose CallEventRef<> UpdatedCall = Call.cloneWithState(CEEState); 22357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 22457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet DstPostCall; 2254e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostCall(DstPostCall, CEENode, 2264e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *UpdatedCall, *this, 2274e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 22857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 22957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet Dst; 2304e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(Call)) { 2314e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose getCheckerManager().runCheckersForPostObjCMessage(Dst, DstPostCall, *Msg, 2324e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, 2334e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose /*WasInlined=*/true); 23457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else if (CE) { 23557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose getCheckerManager().runCheckersForPostStmt(Dst, DstPostCall, CE, 2364e79fdfe22db1c982e8fdf8397fee426a8c57821Jordan Rose *this, /*WasInlined=*/true); 23757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else { 23857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Dst.insert(DstPostCall); 23957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 2400b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2410b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Enqueue the next element in the block. 2420b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator PSI = Dst.begin(), PSE = Dst.end(); 2430b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PSI != PSE; ++PSI) { 2440b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Engine.getWorkList()->enqueue(*PSI, calleeCtx->getCallSiteBlock(), 2450b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks calleeCtx->getIndex()+1); 2460b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 247242384ddb0e0b65dd7e9e0ac0cf3c31cf98b06a6Ted Kremenek } 248294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 249294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 2500849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenekstatic unsigned getNumberStackFrames(const LocationContext *LCtx) { 2510849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek unsigned count = 0; 2520849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek while (LCtx) { 2530849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek if (isa<StackFrameContext>(LCtx)) 2540849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek ++count; 2550849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek LCtx = LCtx->getParent(); 2560849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek } 2570849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek return count; 2580849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek} 2590849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek 26081fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rosestatic bool IsInStdNamespace(const FunctionDecl *FD) { 26181fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose const DeclContext *DC = FD->getEnclosingNamespaceContext(); 26281fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC); 26381fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (!ND) 26481fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose return false; 26581fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 26681fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose while (const DeclContext *Parent = ND->getParent()) { 26781fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (!isa<NamespaceDecl>(Parent)) 26881fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose break; 26981fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose ND = cast<NamespaceDecl>(Parent); 27081fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose } 27181fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 27281fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose return ND->getName() == "std"; 27381fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose} 27481fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 2756cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks// Determine if we should inline the call. 2767fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenekbool ExprEngine::shouldInlineDecl(const Decl *D, ExplodedNode *Pred) { 2777fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 2786cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 2796cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 28001561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // It is possible that the CFG cannot be constructed. 28101561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // Be safe, and check if the CalleeCFG is valid. 28201561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek if (!CalleeCFG) 28301561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek return false; 28401561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek 2856cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (getNumberStackFrames(Pred->getLocationContext()) 286255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek == AMgr.options.InlineMaxStackDepth) 2876cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2886cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 2897fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (Engine.FunctionSummaries->hasReachedMaxBlockCount(D)) 2903bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks return false; 2913bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks 292255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if (CalleeCFG->getNumBlockIDs() > AMgr.options.InlineMaxFunctionSize) 2936cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2946cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 29510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek // Do not inline variadic calls (for now). 29610f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) { 29710f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (BD->isVariadic()) 29810f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 29910f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek } 30010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 30110f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (FD->isVariadic()) 30210f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 3035903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } 3045903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 30581fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (getContext().getLangOpts().CPlusPlus) { 30681fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 30781fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose // Conditionally allow the inlining of template functions. 30881fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (!getAnalysisManager().options.mayInlineTemplateFunctions()) 30981fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (FD->getTemplatedKind() != FunctionDecl::TK_NonTemplate) 31081fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose return false; 31181fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 31281fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose // Conditionally allow the inlining of C++ standard library functions. 31381fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (!getAnalysisManager().options.mayInlineCXXStandardLibrary()) 31481fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (getContext().getSourceManager().isInSystemHeader(FD->getLocation())) 31581fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose if (IsInStdNamespace(FD)) 31681fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose return false; 31781fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose } 31881fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose } 31981fb50e8b120fc95dc0245b4112972d4d7cca3b5Jordan Rose 320d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // It is possible that the live variables analysis cannot be 321d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // run. If so, bail out. 322d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek if (!CalleeADC->getAnalysis<RelaxedLiveVariables>()) 323d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek return false; 324d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek 32510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return true; 3265903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks} 3275903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 328e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// The GDM component containing the dynamic dispatch bifurcation info. When 329e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// the exact type of the receiver is not known, we want to explore both paths - 330e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// one on which we do inline it and the other one on which we don't. This is 331e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// done to ensure we do not drop coverage. 332e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// This is the map from the receiver region to a bool, specifying either we 333e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// consider this region's information precise or not along the given path. 334e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace clang { 335e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace ento { 3366960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaksenum DynamicDispatchMode { DynamicDispatchModeInlined = 1, 3376960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative }; 3386960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 339e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksstruct DynamicDispatchBifurcationMap {}; 340e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstypedef llvm::ImmutableMap<const MemRegion*, 3416960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks unsigned int> DynamicDispatchBifur; 342e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstemplate<> struct ProgramStateTrait<DynamicDispatchBifurcationMap> 343e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks : public ProgramStatePartialTrait<DynamicDispatchBifur> { 344e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks static void *GDMIndex() { static int index; return &index; } 345e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}; 3466960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 347e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}} 348e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 349e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksbool ExprEngine::inlineCall(const CallEvent &Call, const Decl *D, 350e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred, 351e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State) { 352e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(D); 353ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 354c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const LocationContext *CurLC = Pred->getLocationContext(); 355c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const StackFrameContext *CallerSFC = CurLC->getCurrentStackFrame(); 3567fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const LocationContext *ParentOfCallee = 0; 35769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 358de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose const AnalyzerOptions &Opts = getAnalysisManager().options; 359de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose 360ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: Refactor this check into a hypothetical CallEvent::canInline. 36169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose switch (Call.getKind()) { 36269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Function: 3632f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose break; 36469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_CXXMember: 365e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose case CE_CXXMemberOperator: 366de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose if (!Opts.mayInlineCXXMemberFunction(CIMK_MemberFunctions)) 3672f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 36869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 369ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXConstructor: { 370de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose if (!Opts.mayInlineCXXMemberFunction(CIMK_Constructors)) 3712f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3722f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 373ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXConstructorCall &Ctor = cast<CXXConstructorCall>(Call); 374ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 375e460c46c5d602f65354cab0879c458890273591cJordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 376ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Ctor.getCXXThisVal().getAsRegion(); 377e460c46c5d602f65354cab0879c458890273591cJordan Rose if (Target && isa<ElementRegion>(Target)) 378e460c46c5d602f65354cab0879c458890273591cJordan Rose return false; 379e460c46c5d602f65354cab0879c458890273591cJordan Rose 3806fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose // FIXME: This is a hack. We don't use the correct region for a new 3816fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose // expression, so if we inline the constructor its result will just be 3826fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose // thrown away. This short-term hack is tracked in <rdar://problem/12180598> 3836fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose // and the longer-term possible fix is discussed in PR12014. 3846fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose const CXXConstructExpr *CtorExpr = Ctor.getOriginExpr(); 3856fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose if (const Stmt *Parent = CurLC->getParentMap().getParent(CtorExpr)) 3866fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose if (isa<CXXNewExpr>(Parent)) 3876fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose return false; 3886fe4dfbc9e5a7018763b1d898876d9b2b8ec3425Jordan Rose 389de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose // Inlining constructors requires including initializers in the CFG. 390de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 391de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose assert(ADC->getCFGBuildOptions().AddInitializers && "No CFG initializers"); 3929eb214a691663a04ee61197e7d605128c85e09f7Jordan Rose (void)ADC; 393de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose 394c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose // If the destructor is trivial, it's always safe to inline the constructor. 395c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose if (Ctor.getDecl()->getParent()->hasTrivialDestructor()) 396c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose break; 397c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose 398de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose // For other types, only inline constructors if destructor inlining is 399de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose // also enabled. 400de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose if (!Opts.mayInlineCXXMemberFunction(CIMK_Destructors)) 401c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose return false; 402c210cb7a358d14cdd93b58562f33ff5ed2d895c1Jordan Rose 4033a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // FIXME: This is a hack. We don't handle temporary destructors 404888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // right now, so we shouldn't inline their constructors. 405ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (CtorExpr->getConstructionKind() == CXXConstructExpr::CK_Complete) 406ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!Target || !isa<DeclRegion>(Target)) 407ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 408ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 409ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose break; 410ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 411ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXDestructor: { 412de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose if (!Opts.mayInlineCXXMemberFunction(CIMK_Destructors)) 4132f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 4142f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 415de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose // Inlining destructors requires building the CFG correctly. 416ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 417de5277fc555551857602bd7a7e5e616274e2d4a6Jordan Rose assert(ADC->getCFGBuildOptions().AddImplicitDtors && "No CFG destructors"); 4189eb214a691663a04ee61197e7d605128c85e09f7Jordan Rose (void)ADC; 419ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 420ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXDestructorCall &Dtor = cast<CXXDestructorCall>(Call); 421ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 422ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 423ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Dtor.getCXXThisVal().getAsRegion(); 424ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (Target && isa<ElementRegion>(Target)) 425ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 426ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 427da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose break; 428da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose } 42970cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXAllocator: 43070cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Do not inline allocators until we model deallocators. 43170cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 43270cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 43369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Block: { 43469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDataRegion *BR = cast<BlockCall>(Call).getBlockRegion(); 435ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose assert(BR && "If we have the block definition we should have its region"); 43669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose AnalysisDeclContext *BlockCtx = AMgr.getAnalysisDeclContext(D); 4377fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = BlockCtx->getBlockInvocationContext(CallerSFC, 43869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose cast<BlockDecl>(D), 4397fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek BR); 44069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 44169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 44269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCMessage: 443255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if (!(getAnalysisManager().options.IPAMode == DynamicDispatch || 444255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek getAnalysisManager().options.IPAMode == DynamicDispatchBifurcate)) 445e13056a8bb532ddfdc07952a13169aa422bacd3bAnna Zaks return false; 4469dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks break; 447256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 448ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 449ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose if (!shouldInlineDecl(D, Pred)) 4507fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 4517fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 4527fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (!ParentOfCallee) 4537fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = CallerSFC; 4547fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 455852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // This may be NULL, but that's fine. 45669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *CallE = Call.getOriginExpr(); 45769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 4587fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // Construct a new stack frame for the callee. 4597fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 4607fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CalleeSFC = 46169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CalleeADC->getStackFrame(ParentOfCallee, CallE, 46266c486f275531df6362b3511fc3af6563561801bTed Kremenek currBldrCtx->getBlock(), 46366c486f275531df6362b3511fc3af6563561801bTed Kremenek currStmtIdx); 4647fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 465c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose CallEnter Loc(CallE, CalleeSFC, CurLC); 466e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 467e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // Construct a new state which contains the mapping from actual to 468e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // formal arguments. 469e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = State->enterStackFrame(Call, CalleeSFC); 470e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 4717fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek bool isNew; 472e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose if (ExplodedNode *N = G.getNode(Loc, State, false, &isNew)) { 4737fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek N->addPredecessor(Pred, G); 4747fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (isNew) 4757fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Engine.getWorkList()->enqueue(N); 4767fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek } 477e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 478e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we decided to inline the call, the successor has been manually 479e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // added onto the work list so remove it from the node builder. 480e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.takeNodes(Pred); 481e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 482210f5a28227c90d739298e3e6729e827858fe397Anna Zaks NumInlinedCalls++; 483210f5a28227c90d739298e3e6729e827858fe397Anna Zaks 484fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks // Mark the decl as visited. 485fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks if (VisitedCallees) 486fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks VisitedCallees->insert(D); 487fbcb3f11fc90e9f00e6074e9b118b8dc11ca604cAnna Zaks 4887fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return true; 489256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 490256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 491e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksstatic ProgramStateRef getInlineFailedState(ProgramStateRef State, 49269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *CallE) { 493e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks void *ReplayState = State->get<ReplayWithoutInlining>(); 4945903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (!ReplayState) 4955903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 49628038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 49728038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(ReplayState == (const void*)CallE && "Backtracked to the wrong call."); 49828038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose (void)CallE; 49928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 500e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->remove<ReplayWithoutInlining>(); 50110520d76044e8fff71d414f30c21b449fd104960Ted Kremenek} 50210520d76044e8fff71d414f30c21b449fd104960Ted Kremenek 503294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred, 504294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &dst) { 505294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Perform the previsit of the CallExpr. 506294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 507294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, CE, *this); 508500abad7edfcc2409b18dd616cdbc28a094926f5Jordy Rose 509d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Get the call in its initial state. We use this as a template to perform 510d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // all the checks. 511d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 512645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose CallEventRef<> CallTemplate 513d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose = CEMgr.getSimpleCall(CE, Pred->getState(), Pred->getLocationContext()); 51469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 51569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the function call. We try each of the checkers 516294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // to see if the can evaluate the function call. 517294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstCallEvaluated; 51869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 51969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose I != E; ++I) { 520d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose evalCall(dstCallEvaluated, *I, *CallTemplate); 52169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 52269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 523294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Finally, perform the post-condition check of the CallExpr and store 524294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // the created nodes in 'Dst'. 52569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Note that if the call was inlined, dstCallEvaluated will be empty. 52669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // The post-CallExpr check will occur in processCallExit. 527294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 528294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek *this); 529294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 530294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 53169f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::evalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 532645baeed6800f952e9ad1d5666e01080385531a2Jordan Rose const CallEvent &Call) { 533d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // WARNING: At this time, the state attached to 'Call' may be older than the 534d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // state in 'Pred'. This is a minor optimization since CheckerManager will 535d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // use an updated CallEvent instance when calling checkers, but if 'Call' is 536d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // ever used directly in this function all callers should be updated to pass 537d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // the most recent state. (It is probably not worth doing the work here since 538d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // for some callers this will not be necessary.) 539d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 54096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Run any pre-call checks using the generic call interface. 54196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstPreVisit; 54296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPreCall(dstPreVisit, Pred, Call, *this); 54396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 54496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Actually evaluate the function call. We try each of the checkers 54596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // to see if the can evaluate the function call, and get a callback at 54696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // defaultEvalCall if all of them fail. 54796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstCallEvaluated; 54896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, dstPreVisit, 54996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 55096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 55196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Finally, run any post-call checks. 55296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPostCall(Dst, dstCallEvaluated, 55396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 55469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 55569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 556e81ce256b62717dd846bd19aecc4115a0dcd4995Anna ZaksProgramStateRef ExprEngine::bindReturnValue(const CallEvent &Call, 557e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const LocationContext *LCtx, 558e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks ProgramStateRef State) { 559e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const Expr *E = Call.getOriginExpr(); 560e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (!E) 561e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State; 562e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 563e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Some method families have known return values. 564e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(&Call)) { 565e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks switch (Msg->getMethodFamily()) { 566e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks default: 567e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks break; 568e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_autorelease: 569e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_retain: 570e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_self: { 571e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // These methods return their receivers. 572e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, Msg->getReceiverSVal()); 573e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 574e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 575e460c46c5d602f65354cab0879c458890273591cJordan Rose } else if (const CXXConstructorCall *C = dyn_cast<CXXConstructorCall>(&Call)){ 576e460c46c5d602f65354cab0879c458890273591cJordan Rose return State->BindExpr(E, LCtx, C->getCXXThisVal()); 577e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 578e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 579e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Conjure a symbol if the return value is unknown. 580e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks QualType ResultTy = Call.getResultType(); 581e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks SValBuilder &SVB = getSValBuilder(); 58266c486f275531df6362b3511fc3af6563561801bTed Kremenek unsigned Count = currBldrCtx->blockCount(); 5833b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek SVal R = SVB.conjureSymbolVal(0, E, LCtx, ResultTy, Count); 584e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, R); 585e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks} 586e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 587e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// Conservatively evaluate call by invalidating regions and binding 588e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// a conjured return value. 589e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::conservativeEvalCall(const CallEvent &Call, NodeBuilder &Bldr, 590e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ExplodedNode *Pred, ProgramStateRef State) { 59166c486f275531df6362b3511fc3af6563561801bTed Kremenek State = Call.invalidateRegions(currBldrCtx->blockCount(), State); 592e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = bindReturnValue(Call, Pred->getLocationContext(), State); 593e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 594e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // And make the result node. 595e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.generateNode(Call.getProgramPoint(), State, Pred); 596e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 597e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 598e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksvoid ExprEngine::defaultEvalCall(NodeBuilder &Bldr, ExplodedNode *Pred, 599d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const CallEvent &CallTemplate) { 600d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Make sure we have the most recent state attached to the call. 601d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef State = Pred->getState(); 602d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventRef<> Call = CallTemplate.cloneWithState(State); 603e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 6045960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (!getAnalysisManager().shouldInlineCall()) { 6055960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 6065960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 6075960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } 60869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Try to inline the call. 60928038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // The origin expression here is just used as a kind of checksum; 610d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // this should still be safe even for CallEvents that don't come from exprs. 611d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const Expr *E = Call->getOriginExpr(); 612d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef InlinedFailedState = getInlineFailedState(State, E); 613d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 614d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (InlinedFailedState) { 615d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // If we already tried once and failed, make sure we don't retry later. 616d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose State = InlinedFailedState; 6175960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } else { 618e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks RuntimeDefinition RD = Call->getRuntimeDefinition(); 619fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks const Decl *D = RD.getDecl(); 620e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks if (D) { 621b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose if (RD.mayHaveOtherDefinitions()) { 622b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Explore with and without inlining the call. 623255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if (getAnalysisManager().options.IPAMode == DynamicDispatchBifurcate) { 624b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurcateCall(RD.getDispatchRegion(), *Call, D, Bldr, Pred); 625b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 626b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose } 627b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 628b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose // Don't inline if we're not in any dynamic dispatch mode. 629255d4d4226b24036ceb11228fbb74286e58620f7Ted Kremenek if (getAnalysisManager().options.IPAMode != DynamicDispatch) { 630da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose conservativeEvalCall(*Call, Bldr, Pred, State); 631b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose return; 632da29ac527063fc9714547088bf841bfa30557bf0Jordan Rose } 633e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 634b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose 6355960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // We are not bifurcating and we do have a Decl, so just inline. 6365960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(*Call, D, Bldr, Pred, State)) 6375960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 638e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 639e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 64069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 64169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // If we can't inline it, handle the return value and invalidate the regions. 642e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 643e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 64469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 645e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::BifurcateCall(const MemRegion *BifurReg, 646e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks const CallEvent &Call, const Decl *D, 647e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred) { 648e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(BifurReg); 649b763ede873c23c8651bd18eba0c62e929b496ba5Jordan Rose BifurReg = BifurReg->StripCasts(); 650e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 651e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Check if we've performed the split already - note, we only want 652e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // to split the path once per memory region. 653e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State = Pred->getState(); 6546960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks const unsigned int *BState = 6556960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->get<DynamicDispatchBifurcationMap>(BifurReg); 6565960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (BState) { 6575960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If we are on "inline path", keep inlining if possible. 6586960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks if (*BState == DynamicDispatchModeInlined) 6595960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(Call, D, Bldr, Pred, State)) 6605960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 6615960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If inline failed, or we are on the path where we assume we 6625960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // don't have enough info about the receiver to inline, conjure the 6635960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // return value and invalidate the regions. 6645960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, State); 6655960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 666e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 667e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 668e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we got here, this is the first time we process a message to this 669e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // region, so split the path. 670e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef IState = 6716960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6726960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeInlined); 673e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks inlineCall(Call, D, Bldr, Pred, IState); 674e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 675e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef NoIState = 6766960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6776960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative); 678e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, NoIState); 679e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 680e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NumOfDynamicDispatchPathSplits++; 681e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return; 68269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 68369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 684e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 685294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 686294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 687256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 688256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNodeSet dstPreVisit; 689256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, RS, *this); 690256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 69166c486f275531df6362b3511fc3af6563561801bTed Kremenek StmtNodeBuilder B(dstPreVisit, Dst, *currBldrCtx); 692256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 693256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (RS->getRetValue()) { 694256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek for (ExplodedNodeSet::iterator it = dstPreVisit.begin(), 695256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ei = dstPreVisit.end(); it != ei; ++it) { 696256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek B.generateNode(RS, *it, (*it)->getState()); 697294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 698294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 699294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 700