1//==- BlockCounter.h - ADT for counting block visits ---------------*- C++ -*-//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//  This file defines BlockCounter, an abstract data type used to count
11//  the number of times a given block has been visited along a path
12//  analyzed by CoreEngine.
13//
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_CLANG_GR_BLOCKCOUNTER
17#define LLVM_CLANG_GR_BLOCKCOUNTER
18
19#include "llvm/Support/Allocator.h"
20
21namespace clang {
22
23class StackFrameContext;
24
25namespace ento {
26
27/// \class BlockCounter
28/// \brief An abstract data type used to count the number of times a given
29/// block has been visited along a path analyzed by CoreEngine.
30class BlockCounter {
31  void *Data;
32
33  BlockCounter(void *D) : Data(D) {}
34
35public:
36  BlockCounter() : Data(nullptr) {}
37
38  unsigned getNumVisited(const StackFrameContext *CallSite,
39                         unsigned BlockID) const;
40
41  class Factory {
42    void *F;
43  public:
44    Factory(llvm::BumpPtrAllocator& Alloc);
45    ~Factory();
46
47    BlockCounter GetEmptyCounter();
48    BlockCounter IncrementCount(BlockCounter BC,
49                                  const StackFrameContext *CallSite,
50                                  unsigned BlockID);
51  };
52
53  friend class Factory;
54};
55
56} // end GR namespace
57
58} // end clang namespace
59
60#endif
61