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       1             : //===-- DwarfException.h - Dwarf Exception Framework -----------*- 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 dwarf exception info into asm files.
      11             : //
      12             : //===----------------------------------------------------------------------===//
      13             : 
      14             : #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
      15             : #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
      16             : 
      17             : #include "EHStreamer.h"
      18             : #include "llvm/CodeGen/AsmPrinter.h"
      19             : #include "llvm/MC/MCDwarf.h"
      20             : 
      21             : namespace llvm {
      22             : class MachineFunction;
      23             : class ARMTargetStreamer;
      24             : 
      25       23567 : class LLVM_LIBRARY_VISIBILITY DwarfCFIExceptionBase : public EHStreamer {
      26             : protected:
      27             :   DwarfCFIExceptionBase(AsmPrinter *A);
      28             : 
      29             :   /// Per-function flag to indicate if frame CFI info should be emitted.
      30             :   bool shouldEmitCFI;
      31             :   /// Per-module flag to indicate if .cfi_section has beeen emitted.
      32             :   bool hasEmittedCFISections;
      33             : 
      34             :   void markFunctionEnd() override;
      35             :   void endFragment() override;
      36             : };
      37             : 
      38             : class LLVM_LIBRARY_VISIBILITY DwarfCFIException : public DwarfCFIExceptionBase {
      39             :   /// Per-function flag to indicate if .cfi_personality should be emitted.
      40             :   bool shouldEmitPersonality;
      41             : 
      42             :   /// Per-function flag to indicate if .cfi_personality must be emitted.
      43             :   bool forceEmitPersonality;
      44             : 
      45             :   /// Per-function flag to indicate if .cfi_lsda should be emitted.
      46             :   bool shouldEmitLSDA;
      47             : 
      48             :   /// Per-function flag to indicate if frame moves info should be emitted.
      49             :   bool shouldEmitMoves;
      50             : 
      51             : public:
      52             :   //===--------------------------------------------------------------------===//
      53             :   // Main entry points.
      54             :   //
      55             :   DwarfCFIException(AsmPrinter *A);
      56             :   ~DwarfCFIException() override;
      57             : 
      58             :   /// Emit all exception information that should come after the content.
      59             :   void endModule() override;
      60             : 
      61             :   /// Gather pre-function exception information.  Assumes being emitted
      62             :   /// immediately after the function entry point.
      63             :   void beginFunction(const MachineFunction *MF) override;
      64             : 
      65             :   /// Gather and emit post-function exception information.
      66             :   void endFunction(const MachineFunction *) override;
      67             : 
      68             :   void beginFragment(const MachineBasicBlock *MBB,
      69             :                      ExceptionSymbolProvider ESP) override;
      70             : };
      71             : 
      72             : class LLVM_LIBRARY_VISIBILITY ARMException : public DwarfCFIExceptionBase {
      73             :   void emitTypeInfos(unsigned TTypeEncoding, MCSymbol *TTBaseLabel) override;
      74             :   ARMTargetStreamer &getTargetStreamer();
      75             : 
      76             : public:
      77             :   //===--------------------------------------------------------------------===//
      78             :   // Main entry points.
      79             :   //
      80             :   ARMException(AsmPrinter *A);
      81             :   ~ARMException() override;
      82             : 
      83             :   /// Emit all exception information that should come after the content.
      84        1934 :   void endModule() override {}
      85             : 
      86             :   /// Gather pre-function exception information.  Assumes being emitted
      87             :   /// immediately after the function entry point.
      88             :   void beginFunction(const MachineFunction *MF) override;
      89             : 
      90             :   /// Gather and emit post-function exception information.
      91             :   void endFunction(const MachineFunction *) override;
      92             : };
      93             : } // End of namespace llvm
      94             : 
      95             : #endif