MPIBugReporter.cpp revision 360784 
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
19namespace clang {
20namespace ento {
21namespace mpi {
22
23void 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
49void 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
69void 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
87PathDiagnosticPieceRef
88MPIBugReporter::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