BlockCounter.h

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//==- BlockCounter.h - ADT for counting block visits ---------------*- 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
//
//===----------------------------------------------------------------------===//
//
//  This file defines BlockCounter, an abstract data type used to count
//  the number of times a given block has been visited along a path
//  analyzed by CoreEngine.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_BLOCKCOUNTER_H
#define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_BLOCKCOUNTER_H
 
#include "llvm/Support/Allocator.h"
 
namespace clang {
 
class StackFrame;
 
namespace ento {
 
/// \class BlockCounter
/// An abstract data type used to count the number of times a given
/// block has been visited along a path analyzed by CoreEngine.
class BlockCounter {
  void *Data;
 
  BlockCounter(void *D) : Data(D) {}
 
public:
  BlockCounter() : Data(nullptr) {}
 
  unsigned getNumVisited(const StackFrame *CallSite, unsigned BlockID) const;
 
  class Factory {
    void *F;
  public:
    Factory(llvm::BumpPtrAllocator& Alloc);
    ~Factory();
 
    BlockCounter GetEmptyCounter();
    BlockCounter IncrementCount(BlockCounter BC, const StackFrame *CallSite,
                                unsigned BlockID);
  };
 
  friend class Factory;
};
 
} // end GR namespace
 
} // end clang namespace
 
#endif