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//===-- MPIBugReporter.cpp - bug reporter -----------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file defines prefabricated reports which are emitted in
/// case of MPI related bugs, detected by path-sensitive analysis.
///
//===----------------------------------------------------------------------===//
#include "MPIBugReporter.h"
#include "MPIChecker.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
namespace clang {
namespace ento {
namespace mpi {
void MPIBugReporter::reportDoubleNonblocking(
const CallEvent &MPICallEvent, const ento::mpi::Request &Req,
const MemRegion *const RequestRegion,
const ExplodedNode *const ExplNode,
BugReporter &BReporter) const {
std::string ErrorText;
ErrorText = "Double nonblocking on request " +
RequestRegion->getDescriptiveName() + ". ";
auto Report = std::make_unique<PathSensitiveBugReport>(
*DoubleNonblockingBugType, ErrorText, ExplNode);
Report->addRange(MPICallEvent.getSourceRange());
SourceRange Range = RequestRegion->sourceRange();
if (Range.isValid())
Report->addRange(Range);
Report->addVisitor(std::make_unique<RequestNodeVisitor>(
RequestRegion, "Request is previously used by nonblocking call here. "));
Report->markInteresting(RequestRegion);
BReporter.emitReport(std::move(Report));
}
void MPIBugReporter::reportMissingWait(
const ento::mpi::Request &Req, const MemRegion *const RequestRegion,
const ExplodedNode *const ExplNode,
BugReporter &BReporter) const {
std::string ErrorText{"Request " + RequestRegion->getDescriptiveName() +
" has no matching wait. "};
auto Report = std::make_unique<PathSensitiveBugReport>(*MissingWaitBugType,
ErrorText, ExplNode);
SourceRange Range = RequestRegion->sourceRange();
if (Range.isValid())
Report->addRange(Range);
Report->addVisitor(std::make_unique<RequestNodeVisitor>(
RequestRegion, "Request is previously used by nonblocking call here. "));
Report->markInteresting(RequestRegion);
BReporter.emitReport(std::move(Report));
}
void MPIBugReporter::reportUnmatchedWait(
const CallEvent &CE, const clang::ento::MemRegion *const RequestRegion,
const ExplodedNode *const ExplNode,
BugReporter &BReporter) const {
std::string ErrorText{"Request " + RequestRegion->getDescriptiveName() +
" has no matching nonblocking call. "};
auto Report = std::make_unique<PathSensitiveBugReport>(*UnmatchedWaitBugType,
ErrorText, ExplNode);
Report->addRange(CE.getSourceRange());
SourceRange Range = RequestRegion->sourceRange();
if (Range.isValid())
Report->addRange(Range);
BReporter.emitReport(std::move(Report));
}
PathDiagnosticPieceRef
MPIBugReporter::RequestNodeVisitor::VisitNode(const ExplodedNode *N,
BugReporterContext &BRC,
PathSensitiveBugReport &BR) {
if (IsNodeFound)
return nullptr;
const Request *const Req = N->getState()->get<RequestMap>(RequestRegion);
assert(Req && "The region must be tracked and alive, given that we've "
"just emitted a report against it");
const Request *const PrevReq =
N->getFirstPred()->getState()->get<RequestMap>(RequestRegion);
// Check if request was previously unused or in a different state.
if (!PrevReq || (Req->CurrentState != PrevReq->CurrentState)) {
IsNodeFound = true;
ProgramPoint P = N->getFirstPred()->getLocation();
PathDiagnosticLocation L =
PathDiagnosticLocation::create(P, BRC.getSourceManager());
return std::make_shared<PathDiagnosticEventPiece>(L, ErrorText);
}
return nullptr;
}
} // end of namespace: mpi
} // end of namespace: ento
} // end of namespace: clang
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