Yi Kong | 8328301 | 2023-12-13 12:57:00 +0900 | [diff] [blame^] | 1 | //==- WorkList.h - Worklist class used by CoreEngine ---------------*- 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 | // This file defines WorkList, a pure virtual class that represents an opaque |
| 10 | // worklist used by CoreEngine to explore the reachability state space. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_WORKLIST_H |
| 15 | #define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_WORKLIST_H |
| 16 | |
| 17 | #include "clang/StaticAnalyzer/Core/PathSensitive/BlockCounter.h" |
| 18 | #include "clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h" |
| 19 | #include <cassert> |
| 20 | |
| 21 | namespace clang { |
| 22 | |
| 23 | class CFGBlock; |
| 24 | |
| 25 | namespace ento { |
| 26 | |
| 27 | class WorkListUnit { |
| 28 | ExplodedNode *node; |
| 29 | BlockCounter counter; |
| 30 | const CFGBlock *block; |
| 31 | unsigned blockIdx; // This is the index of the next statement. |
| 32 | |
| 33 | public: |
| 34 | WorkListUnit(ExplodedNode *N, BlockCounter C, |
| 35 | const CFGBlock *B, unsigned idx) |
| 36 | : node(N), |
| 37 | counter(C), |
| 38 | block(B), |
| 39 | blockIdx(idx) {} |
| 40 | |
| 41 | explicit WorkListUnit(ExplodedNode *N, BlockCounter C) |
| 42 | : node(N), |
| 43 | counter(C), |
| 44 | block(nullptr), |
| 45 | blockIdx(0) {} |
| 46 | |
| 47 | /// Returns the node associated with the worklist unit. |
| 48 | ExplodedNode *getNode() const { return node; } |
| 49 | |
| 50 | /// Returns the block counter map associated with the worklist unit. |
| 51 | BlockCounter getBlockCounter() const { return counter; } |
| 52 | |
| 53 | /// Returns the CFGblock associated with the worklist unit. |
| 54 | const CFGBlock *getBlock() const { return block; } |
| 55 | |
| 56 | /// Return the index within the CFGBlock for the worklist unit. |
| 57 | unsigned getIndex() const { return blockIdx; } |
| 58 | }; |
| 59 | |
| 60 | class WorkList { |
| 61 | BlockCounter CurrentCounter; |
| 62 | public: |
| 63 | virtual ~WorkList(); |
| 64 | virtual bool hasWork() const = 0; |
| 65 | |
| 66 | virtual void enqueue(const WorkListUnit& U) = 0; |
| 67 | |
| 68 | void enqueue(ExplodedNode *N, const CFGBlock *B, unsigned idx) { |
| 69 | enqueue(WorkListUnit(N, CurrentCounter, B, idx)); |
| 70 | } |
| 71 | |
| 72 | void enqueue(ExplodedNode *N) { |
| 73 | assert(N->getLocation().getKind() != ProgramPoint::PostStmtKind); |
| 74 | enqueue(WorkListUnit(N, CurrentCounter)); |
| 75 | } |
| 76 | |
| 77 | virtual WorkListUnit dequeue() = 0; |
| 78 | |
| 79 | void setBlockCounter(BlockCounter C) { CurrentCounter = C; } |
| 80 | BlockCounter getBlockCounter() const { return CurrentCounter; } |
| 81 | |
| 82 | static std::unique_ptr<WorkList> makeDFS(); |
| 83 | static std::unique_ptr<WorkList> makeBFS(); |
| 84 | static std::unique_ptr<WorkList> makeBFSBlockDFSContents(); |
| 85 | static std::unique_ptr<WorkList> makeUnexploredFirst(); |
| 86 | static std::unique_ptr<WorkList> makeUnexploredFirstPriorityQueue(); |
| 87 | static std::unique_ptr<WorkList> makeUnexploredFirstPriorityLocationQueue(); |
| 88 | }; |
| 89 | |
| 90 | } // end ento namespace |
| 91 | |
| 92 | } // end clang namespace |
| 93 | |
| 94 | #endif |