d8a2afb244
Add a checker to maintain the system-defined value 'errno'. The value is supposed to be set in the future by existing or new checkers that evaluate errno-modifying function calls. Reviewed By: NoQ, steakhal Differential Revision: https://reviews.llvm.org/D120310
40 lines
1.5 KiB
C++
40 lines
1.5 KiB
C++
//=== ErrnoModeling.h - Tracking value of 'errno'. -----------------*- 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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// Defines inter-checker API for using the system value 'errno'.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_ERRNOMODELING_H
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#define LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_ERRNOMODELING_H
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#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
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namespace clang {
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namespace ento {
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namespace errno_modeling {
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/// Returns the value of 'errno', if 'errno' was found in the AST.
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llvm::Optional<SVal> getErrnoValue(ProgramStateRef State);
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/// Set value of 'errno' to any SVal, if possible.
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ProgramStateRef setErrnoValue(ProgramStateRef State,
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const LocationContext *LCtx, SVal Value);
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/// Set value of 'errno' to a concrete (signed) integer, if possible.
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ProgramStateRef setErrnoValue(ProgramStateRef State, CheckerContext &C,
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uint64_t Value);
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} // namespace errno_modeling
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} // namespace ento
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} // namespace clang
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#endif // LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_ERRNOMODELING_H
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