/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/include/llvm/MC/MCWinEH.h
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1 | | //===- MCWinEH.h - Windows Unwinding Support --------------------*- 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 | | #ifndef LLVM_MC_MCWINEH_H |
11 | | #define LLVM_MC_MCWINEH_H |
12 | | |
13 | | #include <vector> |
14 | | |
15 | | namespace llvm { |
16 | | class MCSection; |
17 | | class MCStreamer; |
18 | | class MCSymbol; |
19 | | |
20 | | namespace WinEH { |
21 | | struct Instruction { |
22 | | const MCSymbol *Label; |
23 | | const unsigned Offset; |
24 | | const unsigned Register; |
25 | | const unsigned Operation; |
26 | | |
27 | | Instruction(unsigned Op, MCSymbol *L, unsigned Reg, unsigned Off) |
28 | 989 | : Label(L), Offset(Off), Register(Reg), Operation(Op) {} |
29 | | }; |
30 | | |
31 | | struct FrameInfo { |
32 | | const MCSymbol *Begin = nullptr; |
33 | | const MCSymbol *End = nullptr; |
34 | | const MCSymbol *ExceptionHandler = nullptr; |
35 | | const MCSymbol *Function = nullptr; |
36 | | const MCSymbol *PrologEnd = nullptr; |
37 | | const MCSymbol *Symbol = nullptr; |
38 | | const MCSection *TextSection = nullptr; |
39 | | |
40 | | bool HandlesUnwind = false; |
41 | | bool HandlesExceptions = false; |
42 | | |
43 | | int LastFrameInst = -1; |
44 | | const FrameInfo *ChainedParent = nullptr; |
45 | | std::vector<Instruction> Instructions; |
46 | | |
47 | | FrameInfo() = default; |
48 | | FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel) |
49 | 400 | : Begin(BeginFuncEHLabel), Function(Function) {} |
50 | | FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel, |
51 | | const FrameInfo *ChainedParent) |
52 | | : Begin(BeginFuncEHLabel), Function(Function), |
53 | 2 | ChainedParent(ChainedParent) {} |
54 | | }; |
55 | | |
56 | | class UnwindEmitter { |
57 | | public: |
58 | | virtual ~UnwindEmitter(); |
59 | | |
60 | | /// This emits the unwind info sections (.pdata and .xdata in PE/COFF). |
61 | | virtual void Emit(MCStreamer &Streamer) const = 0; |
62 | | virtual void EmitUnwindInfo(MCStreamer &Streamer, FrameInfo *FI) const = 0; |
63 | | }; |
64 | | } |
65 | | } |
66 | | |
67 | | #endif |