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//==- WorkList.h - Worklist class used by CoreEngine ---------------*- C++ -*-//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines WorkList, a pure virtual class that represents an opaque
// worklist used by CoreEngine to explore the reachability state space.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_WORKLIST_H
#define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_WORKLIST_H
#include "clang/StaticAnalyzer/Core/PathSensitive/BlockCounter.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h"
#include <cassert>
namespace clang {
class CFGBlock;
namespace ento {
class WorkListUnit {
ExplodedNode *node;
BlockCounter counter;
const CFGBlock *block;
unsigned blockIdx; // This is the index of the next statement.
public:
WorkListUnit(ExplodedNode *N, BlockCounter C,
const CFGBlock *B, unsigned idx)
: node(N),
counter(C),
block(B),
blockIdx(idx) {}
explicit WorkListUnit(ExplodedNode *N, BlockCounter C)
: node(N),
counter(C),
block(nullptr),
blockIdx(0) {}
/// Returns the node associated with the worklist unit.
ExplodedNode *getNode() const { return node; }
/// Returns the block counter map associated with the worklist unit.
BlockCounter getBlockCounter() const { return counter; }
/// Returns the CFGblock associated with the worklist unit.
const CFGBlock *getBlock() const { return block; }
/// Return the index within the CFGBlock for the worklist unit.
unsigned getIndex() const { return blockIdx; }
};
class WorkList {
BlockCounter CurrentCounter;
public:
virtual ~WorkList();
virtual bool hasWork() const = 0;
virtual void enqueue(const WorkListUnit& U) = 0;
void enqueue(ExplodedNode *N, const CFGBlock *B, unsigned idx) {
enqueue(WorkListUnit(N, CurrentCounter, B, idx));
}
void enqueue(ExplodedNode *N) {
assert(N->getLocation().getKind() != ProgramPoint::PostStmtKind);
enqueue(WorkListUnit(N, CurrentCounter));
}
virtual WorkListUnit dequeue() = 0;
void setBlockCounter(BlockCounter C) { CurrentCounter = C; }
BlockCounter getBlockCounter() const { return CurrentCounter; }
static std::unique_ptr<WorkList> makeDFS();
static std::unique_ptr<WorkList> makeBFS();
static std::unique_ptr<WorkList> makeBFSBlockDFSContents();
static std::unique_ptr<WorkList> makeUnexploredFirst();
static std::unique_ptr<WorkList> makeUnexploredFirstPriorityQueue();
static std::unique_ptr<WorkList> makeUnexploredFirstPriorityLocationQueue();
};
} // end ento namespace
} // end clang namespace
#endif
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