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105 lines
3.9 KiB
105 lines
3.9 KiB
4 months ago
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//===-- MPIChecker.h - Verify MPI API usage- --------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file defines the main class of MPI-Checker which serves as an entry
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/// point. It is created once for each translation unit analysed.
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/// The checker defines path-sensitive checks, to verify correct usage of the
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/// MPI API.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_MPICHECKER_MPICHECKER_H
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#define LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_MPICHECKER_MPICHECKER_H
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#include "MPIBugReporter.h"
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#include "MPITypes.h"
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#include "clang/StaticAnalyzer/Checkers/MPIFunctionClassifier.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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namespace clang {
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namespace ento {
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namespace mpi {
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class MPIChecker : public Checker<check::PreCall, check::DeadSymbols> {
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public:
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MPIChecker() : BReporter(*this) {}
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// path-sensitive callbacks
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void checkPreCall(const CallEvent &CE, CheckerContext &Ctx) const {
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dynamicInit(Ctx);
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checkUnmatchedWaits(CE, Ctx);
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checkDoubleNonblocking(CE, Ctx);
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}
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void checkDeadSymbols(SymbolReaper &SymReaper, CheckerContext &Ctx) const {
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dynamicInit(Ctx);
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checkMissingWaits(SymReaper, Ctx);
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}
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void dynamicInit(CheckerContext &Ctx) const {
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if (FuncClassifier)
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return;
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const_cast<std::unique_ptr<MPIFunctionClassifier> &>(FuncClassifier)
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.reset(new MPIFunctionClassifier{Ctx.getASTContext()});
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}
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/// Checks if a request is used by nonblocking calls multiple times
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/// in sequence without intermediate wait. The check contains a guard,
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/// in order to only inspect nonblocking functions.
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///
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/// \param PreCallEvent MPI call to verify
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void checkDoubleNonblocking(const clang::ento::CallEvent &PreCallEvent,
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clang::ento::CheckerContext &Ctx) const;
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/// Checks if the request used by the wait function was not used at all
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/// before. The check contains a guard, in order to only inspect wait
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/// functions.
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///
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/// \param PreCallEvent MPI call to verify
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void checkUnmatchedWaits(const clang::ento::CallEvent &PreCallEvent,
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clang::ento::CheckerContext &Ctx) const;
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/// Check if a nonblocking call is not matched by a wait.
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/// If a memory region is not alive and the last function using the
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/// request was a nonblocking call, this is rated as a missing wait.
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void checkMissingWaits(clang::ento::SymbolReaper &SymReaper,
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clang::ento::CheckerContext &Ctx) const;
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private:
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/// Collects all memory regions of a request(array) used by a wait
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/// function. If the wait function uses a single request, this is a single
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/// region. For wait functions using multiple requests, multiple regions
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/// representing elements in the array are collected.
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///
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/// \param ReqRegions vector the regions get pushed into
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/// \param MR top most region to iterate
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/// \param CE MPI wait call using the request(s)
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void allRegionsUsedByWait(
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llvm::SmallVector<const clang::ento::MemRegion *, 2> &ReqRegions,
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const clang::ento::MemRegion *const MR, const clang::ento::CallEvent &CE,
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clang::ento::CheckerContext &Ctx) const;
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/// Returns the memory region used by a wait function.
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/// Distinguishes between MPI_Wait and MPI_Waitall.
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///
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/// \param CE MPI wait call
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const clang::ento::MemRegion *
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topRegionUsedByWait(const clang::ento::CallEvent &CE) const;
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const std::unique_ptr<MPIFunctionClassifier> FuncClassifier;
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MPIBugReporter BReporter;
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};
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} // end of namespace: mpi
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} // end of namespace: ento
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} // end of namespace: clang
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#endif
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