LLVM  3.7.0
WinException.h
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1 //===-- WinException.h - Windows Exception Handling ----------*- 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 contains support for writing windows exception info into asm files.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WIN64EXCEPTION_H
15 #define LLVM_LIB_CODEGEN_ASMPRINTER_WIN64EXCEPTION_H
16 
17 #include "EHStreamer.h"
18 
19 namespace llvm {
20 class Function;
21 class GlobalValue;
22 class MachineFunction;
23 class MCExpr;
24 struct WinEHFuncInfo;
25 
27  /// Per-function flag to indicate if personality info should be emitted.
28  bool shouldEmitPersonality = false;
29 
30  /// Per-function flag to indicate if the LSDA should be emitted.
31  bool shouldEmitLSDA = false;
32 
33  /// Per-function flag to indicate if frame moves info should be emitted.
34  bool shouldEmitMoves = false;
35 
36  /// True if this is a 64-bit target and we should use image relative offsets.
37  bool useImageRel32 = false;
38 
39  void emitCSpecificHandlerTable();
40 
41  /// Emit the EH table data for 32-bit and 64-bit functions using
42  /// the __CxxFrameHandler3 personality.
43  void emitCXXFrameHandler3Table(const MachineFunction *MF);
44 
45  /// Emit the EH table data for _except_handler3 and _except_handler4
46  /// personality functions. These are only used on 32-bit and do not use CFI
47  /// tables.
48  void emitExceptHandlerTable(const MachineFunction *MF);
49 
50  void extendIP2StateTable(const MachineFunction *MF, const Function *ParentF,
51  WinEHFuncInfo &FuncInfo);
52 
53  /// Emits the label used with llvm.x86.seh.recoverfp, which is used by
54  /// outlined funclets.
55  void emitEHRegistrationOffsetLabel(const WinEHFuncInfo &FuncInfo,
56  StringRef FLinkageName);
57 
58  const MCExpr *create32bitRef(const MCSymbol *Value);
59  const MCExpr *create32bitRef(const GlobalValue *GV);
60 
61 public:
62  //===--------------------------------------------------------------------===//
63  // Main entry points.
64  //
66  ~WinException() override;
67 
68  /// Emit all exception information that should come after the content.
69  void endModule() override;
70 
71  /// Gather pre-function exception information. Assumes being emitted
72  /// immediately after the function entry point.
73  void beginFunction(const MachineFunction *MF) override;
74 
75  /// Gather and emit post-function exception information.
76  void endFunction(const MachineFunction *) override;
77 };
78 }
79 
80 #endif
81 
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:39
Emits exception handling directives.
Definition: EHStreamer.h:33
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:33
This class is intended to be used as a driving class for all asm writers.
Definition: AsmPrinter.h:66
#define LLVM_LIBRARY_VISIBILITY
LLVM_LIBRARY_VISIBILITY - If a class marked with this attribute is linked into a shared library...
Definition: Compiler.h:110
LLVM Value Representation.
Definition: Value.h:69
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:40