1 //===-- WinException.h - Windows Exception Handling ----------*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for writing windows exception info into asm files.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WIN64EXCEPTION_H
15 #define LLVM_LIB_CODEGEN_ASMPRINTER_WIN64EXCEPTION_H
17 #include "EHStreamer.h"
21 class MachineFunction;
26 class LLVM_LIBRARY_VISIBILITY WinException : public EHStreamer {
27 /// Per-function flag to indicate if personality info should be emitted.
28 bool shouldEmitPersonality = false;
30 /// Per-function flag to indicate if the LSDA should be emitted.
31 bool shouldEmitLSDA = false;
33 /// Per-function flag to indicate if frame moves info should be emitted.
34 bool shouldEmitMoves = false;
36 /// True if this is a 64-bit target and we should use image relative offsets.
37 bool useImageRel32 = false;
39 /// Pointer to the current funclet entry BB.
40 const MachineBasicBlock *CurrentFuncletEntry = nullptr;
42 void emitCSpecificHandlerTable(const MachineFunction *MF);
44 /// Emit the EH table data for 32-bit and 64-bit functions using
45 /// the __CxxFrameHandler3 personality.
46 void emitCXXFrameHandler3Table(const MachineFunction *MF);
48 /// Emit the EH table data for _except_handler3 and _except_handler4
49 /// personality functions. These are only used on 32-bit and do not use CFI
51 void emitExceptHandlerTable(const MachineFunction *MF);
53 void computeIP2StateTable(
54 const MachineFunction *MF, WinEHFuncInfo &FuncInfo,
55 SmallVectorImpl<std::pair<const MCExpr *, int>> &IPToStateTable);
57 /// Emits the label used with llvm.x86.seh.recoverfp, which is used by
58 /// outlined funclets.
59 void emitEHRegistrationOffsetLabel(const WinEHFuncInfo &FuncInfo,
60 StringRef FLinkageName);
62 const MCExpr *create32bitRef(const MCSymbol *Value);
63 const MCExpr *create32bitRef(const Value *V);
64 const MCExpr *getLabelPlusOne(MCSymbol *Label);
67 //===--------------------------------------------------------------------===//
70 WinException(AsmPrinter *A);
71 ~WinException() override;
73 /// Emit all exception information that should come after the content.
74 void endModule() override;
76 /// Gather pre-function exception information. Assumes being emitted
77 /// immediately after the function entry point.
78 void beginFunction(const MachineFunction *MF) override;
80 /// Gather and emit post-function exception information.
81 void endFunction(const MachineFunction *) override;
83 /// \brief Emit target-specific EH funclet machinery.
84 void beginFunclet(const MachineBasicBlock &MBB, MCSymbol *Sym) override;
85 void endFunclet() override;