1 //===-- MPIBugReporter.cpp - bug reporter -----------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// This file defines prefabricated reports which are emitted in 11 /// case of MPI related bugs, detected by path-sensitive analysis. 12 /// 13 //===----------------------------------------------------------------------===// 14 15 #include "MPIBugReporter.h" 16 #include "MPIChecker.h" 17 #include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" 18 19 namespace clang { 20 namespace ento { 21 namespace mpi { 22 23 void MPIBugReporter::reportDoubleNonblocking( 24 const CallEvent &MPICallEvent, const ento::mpi::Request &Req, 25 const MemRegion *const RequestRegion, 26 const ExplodedNode *const ExplNode, 27 BugReporter &BReporter) const { 28 29 std::string ErrorText; 30 ErrorText = "Double nonblocking on request " + 31 RequestRegion->getDescriptiveName() + ". "; 32 33 auto Report = std::make_unique<PathSensitiveBugReport>( 34 *DoubleNonblockingBugType, ErrorText, ExplNode); 35 36 Report->addRange(MPICallEvent.getSourceRange()); 37 SourceRange Range = RequestRegion->sourceRange(); 38 39 if (Range.isValid()) 40 Report->addRange(Range); 41 42 Report->addVisitor(std::make_unique<RequestNodeVisitor>( 43 RequestRegion, "Request is previously used by nonblocking call here. ")); 44 Report->markInteresting(RequestRegion); 45 46 BReporter.emitReport(std::move(Report)); 47 } 48 49 void MPIBugReporter::reportMissingWait( 50 const ento::mpi::Request &Req, const MemRegion *const RequestRegion, 51 const ExplodedNode *const ExplNode, 52 BugReporter &BReporter) const { 53 std::string ErrorText{"Request " + RequestRegion->getDescriptiveName() + 54 " has no matching wait. "}; 55 56 auto Report = std::make_unique<PathSensitiveBugReport>(*MissingWaitBugType, 57 ErrorText, ExplNode); 58 59 SourceRange Range = RequestRegion->sourceRange(); 60 if (Range.isValid()) 61 Report->addRange(Range); 62 Report->addVisitor(std::make_unique<RequestNodeVisitor>( 63 RequestRegion, "Request is previously used by nonblocking call here. ")); 64 Report->markInteresting(RequestRegion); 65 66 BReporter.emitReport(std::move(Report)); 67 } 68 69 void MPIBugReporter::reportUnmatchedWait( 70 const CallEvent &CE, const clang::ento::MemRegion *const RequestRegion, 71 const ExplodedNode *const ExplNode, 72 BugReporter &BReporter) const { 73 std::string ErrorText{"Request " + RequestRegion->getDescriptiveName() + 74 " has no matching nonblocking call. "}; 75 76 auto Report = std::make_unique<PathSensitiveBugReport>(*UnmatchedWaitBugType, 77 ErrorText, ExplNode); 78 79 Report->addRange(CE.getSourceRange()); 80 SourceRange Range = RequestRegion->sourceRange(); 81 if (Range.isValid()) 82 Report->addRange(Range); 83 84 BReporter.emitReport(std::move(Report)); 85 } 86 87 PathDiagnosticPieceRef 88 MPIBugReporter::RequestNodeVisitor::VisitNode(const ExplodedNode *N, 89 BugReporterContext &BRC, 90 PathSensitiveBugReport &BR) { 91 92 if (IsNodeFound) 93 return nullptr; 94 95 const Request *const Req = N->getState()->get<RequestMap>(RequestRegion); 96 assert(Req && "The region must be tracked and alive, given that we've " 97 "just emitted a report against it"); 98 const Request *const PrevReq = 99 N->getFirstPred()->getState()->get<RequestMap>(RequestRegion); 100 101 // Check if request was previously unused or in a different state. 102 if (!PrevReq || (Req->CurrentState != PrevReq->CurrentState)) { 103 IsNodeFound = true; 104 105 ProgramPoint P = N->getFirstPred()->getLocation(); 106 PathDiagnosticLocation L = 107 PathDiagnosticLocation::create(P, BRC.getSourceManager()); 108 109 return std::make_shared<PathDiagnosticEventPiece>(L, ErrorText); 110 } 111 112 return nullptr; 113 } 114 115 } // end of namespace: mpi 116 } // end of namespace: ento 117 } // end of namespace: clang 118