llvm/include/llvm/Analysis/StackSafetyAnalysis.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120

//===- StackSafetyAnalysis.h - Stack memory safety analysis -----*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Stack Safety Analysis detects allocas and arguments with safe access.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_STACKSAFETYANALYSIS_H
#define LLVM_ANALYSIS_STACKSAFETYANALYSIS_H

#include "llvm/IR/PassManager.h"
#include "llvm/Pass.h"

namespace llvm {

/// Interface to access stack safety analysis results for single function.
class StackSafetyInfo {
public:
  struct FunctionInfo;

private:
  std::unique_ptr<FunctionInfo> Info;

public:
  StackSafetyInfo();
  StackSafetyInfo(FunctionInfo &&Info);
  StackSafetyInfo(StackSafetyInfo &&);
  StackSafetyInfo &operator=(StackSafetyInfo &&);
  ~StackSafetyInfo();

  // TODO: Add useful for client methods.
  void print(raw_ostream &O) const;
};

/// StackSafetyInfo wrapper for the new pass manager.
class StackSafetyAnalysis : public AnalysisInfoMixin<StackSafetyAnalysis> {
  friend AnalysisInfoMixin<StackSafetyAnalysis>;
  static AnalysisKey Key;

public:
  using Result = StackSafetyInfo;
  StackSafetyInfo run(Function &F, FunctionAnalysisManager &AM);
};

/// Printer pass for the \c StackSafetyAnalysis results.
class StackSafetyPrinterPass : public PassInfoMixin<StackSafetyPrinterPass> {
  raw_ostream &OS;

public:
  explicit StackSafetyPrinterPass(raw_ostream &OS) : OS(OS) {}
  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
};

/// StackSafetyInfo wrapper for the legacy pass manager
class StackSafetyInfoWrapperPass : public FunctionPass {
  StackSafetyInfo SSI;

public:
  static char ID;
  StackSafetyInfoWrapperPass();

  const StackSafetyInfo &getResult() const { return SSI; }

  void print(raw_ostream &O, const Module *M) const override;
  void getAnalysisUsage(AnalysisUsage &AU) const override;

  bool runOnFunction(Function &F) override;
};

using StackSafetyGlobalInfo = std::map<const GlobalValue *, StackSafetyInfo>;

/// This pass performs the global (interprocedural) stack safety analysis (new
/// pass manager).
class StackSafetyGlobalAnalysis
    : public AnalysisInfoMixin<StackSafetyGlobalAnalysis> {
  friend AnalysisInfoMixin<StackSafetyGlobalAnalysis>;
  static AnalysisKey Key;

public:
  using Result = StackSafetyGlobalInfo;
  Result run(Module &M, ModuleAnalysisManager &AM);
};

/// Printer pass for the \c StackSafetyGlobalAnalysis results.
class StackSafetyGlobalPrinterPass
    : public PassInfoMixin<StackSafetyGlobalPrinterPass> {
  raw_ostream &OS;

public:
  explicit StackSafetyGlobalPrinterPass(raw_ostream &OS) : OS(OS) {}
  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
};

/// This pass performs the global (interprocedural) stack safety analysis
/// (legacy pass manager).
class StackSafetyGlobalInfoWrapperPass : public ModulePass {
  StackSafetyGlobalInfo SSI;

public:
  static char ID;

  StackSafetyGlobalInfoWrapperPass();

  const StackSafetyGlobalInfo &getResult() const { return SSI; }

  void print(raw_ostream &O, const Module *M) const override;
  void getAnalysisUsage(AnalysisUsage &AU) const override;

  bool runOnModule(Module &M) override;
};

} // end namespace llvm

#endif // LLVM_ANALYSIS_STACKSAFETYANALYSIS_H