| //===-- RecordOps.h ---------------------------------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Operations on records (structs, classes, and unions). |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_RECORDOPS_H |
| #define LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_RECORDOPS_H |
| |
| #include "clang/Analysis/FlowSensitive/DataflowEnvironment.h" |
| #include "clang/Analysis/FlowSensitive/StorageLocation.h" |
| |
| namespace clang { |
| namespace dataflow { |
| |
| /// Copies a record (struct, class, or union) from `Src` to `Dst`. |
| /// |
| /// This performs a deep copy, i.e. it copies every field (including synthetic |
| /// fields) and recurses on fields of record type. |
| /// |
| /// If there is a `RecordValue` associated with `Dst` in the environment, this |
| /// function creates a new `RecordValue` and associates it with `Dst`; clients |
| /// need to be aware of this and must not assume that the `RecordValue` |
| /// associated with `Dst` remains the same after the call. |
| /// |
| /// Requirements: |
| /// |
| /// Either: |
| /// - `Src` and `Dest` must have the same canonical unqualified type, or |
| /// - The type of `Src` must be derived from `Dest`, or |
| /// - The type of `Dest` must be derived from `Src` (in this case, any fields |
| /// that are only present in `Dest` are not overwritten). |
| void copyRecord(RecordStorageLocation &Src, RecordStorageLocation &Dst, |
| Environment &Env); |
| |
| /// Returns whether the records `Loc1` and `Loc2` are equal. |
| /// |
| /// Values for `Loc1` are retrieved from `Env1`, and values for `Loc2` are |
| /// retrieved from `Env2`. A convenience overload retrieves values for `Loc1` |
| /// and `Loc2` from the same environment. |
| /// |
| /// This performs a deep comparison, i.e. it compares every field (including |
| /// synthetic fields) and recurses on fields of record type. Fields of reference |
| /// type compare equal if they refer to the same storage location. |
| /// |
| /// Note on how to interpret the result: |
| /// - If this returns true, the records are guaranteed to be equal at runtime. |
| /// - If this returns false, the records may still be equal at runtime; our |
| /// analysis merely cannot guarantee that they will be equal. |
| /// |
| /// Requirements: |
| /// |
| /// `Src` and `Dst` must have the same canonical unqualified type. |
| bool recordsEqual(const RecordStorageLocation &Loc1, const Environment &Env1, |
| const RecordStorageLocation &Loc2, const Environment &Env2); |
| |
| inline bool recordsEqual(const RecordStorageLocation &Loc1, |
| const RecordStorageLocation &Loc2, |
| const Environment &Env) { |
| return recordsEqual(Loc1, Env, Loc2, Env); |
| } |
| |
| } // namespace dataflow |
| } // namespace clang |
| |
| #endif // LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_RECORDOPS_H |