1 //===-- WinCFGuard.h - Windows Control Flow Guard 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_WINCFGUARD_H
15 #define LLVM_LIB_CODEGEN_ASMPRINTER_WINCFGUARD_H
16 
17 #include "AsmPrinterHandler.h"
18 #include "llvm/Support/Compiler.h"
19 
20 namespace llvm {
21 
22 class LLVM_LIBRARY_VISIBILITY WinCFGuard : public AsmPrinterHandler {
23   /// Target of directive emission.
24   AsmPrinter *Asm;
25 
26 public:
27   WinCFGuard(AsmPrinter *A);
28   ~WinCFGuard() override;
29 
setSymbolSize(const MCSymbol * Sym,uint64_t Size)30   void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {}
31 
32   /// Emit the Control Flow Guard function ID table
33   void endModule() override;
34 
35   /// Gather pre-function debug information.
36   /// Every beginFunction(MF) call should be followed by an endFunction(MF)
37   /// call.
beginFunction(const MachineFunction * MF)38   void beginFunction(const MachineFunction *MF) override {}
39 
40   /// Gather post-function debug information.
41   /// Please note that some AsmPrinter implementations may not call
42   /// beginFunction at all.
endFunction(const MachineFunction * MF)43   void endFunction(const MachineFunction *MF) override {}
44 
45   /// Process beginning of an instruction.
beginInstruction(const MachineInstr * MI)46   void beginInstruction(const MachineInstr *MI) override {}
47 
48   /// Process end of an instruction.
endInstruction()49   void endInstruction() override {}
50 };
51 
52 } // namespace llvm
53 
54 #endif
55