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//===-- DwarfException.h - Dwarf Exception Framework -----------*- C++ -*--===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains support for writing dwarf exception info into asm files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
#include "EHStreamer.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/MC/MCDwarf.h"
namespace llvm {
class MachineFunction;
class ARMTargetStreamer;
class LLVM_LIBRARY_VISIBILITY DwarfCFIExceptionBase : public EHStreamer {
protected:
DwarfCFIExceptionBase(AsmPrinter *A);
/// Per-function flag to indicate if frame CFI info should be emitted.
bool shouldEmitCFI = false;
/// Per-module flag to indicate if .cfi_section has beeen emitted.
bool hasEmittedCFISections = false;
void markFunctionEnd() override;
void endFragment() override;
};
class LLVM_LIBRARY_VISIBILITY DwarfCFIException : public DwarfCFIExceptionBase {
/// Per-function flag to indicate if .cfi_personality should be emitted.
bool shouldEmitPersonality = false;
/// Per-function flag to indicate if .cfi_personality must be emitted.
bool forceEmitPersonality = false;
/// Per-function flag to indicate if .cfi_lsda should be emitted.
bool shouldEmitLSDA = false;
public:
//===--------------------------------------------------------------------===//
// Main entry points.
//
DwarfCFIException(AsmPrinter *A);
~DwarfCFIException() override;
/// Emit all exception information that should come after the content.
void endModule() override;
/// Gather pre-function exception information. Assumes being emitted
/// immediately after the function entry point.
void beginFunction(const MachineFunction *MF) override;
/// Gather and emit post-function exception information.
void endFunction(const MachineFunction *) override;
void beginFragment(const MachineBasicBlock *MBB,
ExceptionSymbolProvider ESP) override;
void beginBasicBlock(const MachineBasicBlock &MBB) override;
void endBasicBlock(const MachineBasicBlock &MBB) override;
};
class LLVM_LIBRARY_VISIBILITY ARMException : public DwarfCFIExceptionBase {
void emitTypeInfos(unsigned TTypeEncoding, MCSymbol *TTBaseLabel) override;
ARMTargetStreamer &getTargetStreamer();
public:
//===--------------------------------------------------------------------===//
// Main entry points.
//
ARMException(AsmPrinter *A);
~ARMException() override;
/// Emit all exception information that should come after the content.
void endModule() override {}
/// Gather pre-function exception information. Assumes being emitted
/// immediately after the function entry point.
void beginFunction(const MachineFunction *MF) override;
/// Gather and emit post-function exception information.
void endFunction(const MachineFunction *) override;
};
class LLVM_LIBRARY_VISIBILITY AIXException : public DwarfCFIExceptionBase {
/// This is AIX's compat unwind section, which unwinder would use
/// to find the location of LSDA area and personality rountine.
void emitExceptionInfoTable(const MCSymbol *LSDA, const MCSymbol *PerSym);
public:
AIXException(AsmPrinter *A);
void markFunctionEnd() override;
void endModule() override {}
void beginFunction(const MachineFunction *MF) override {}
void endFunction(const MachineFunction *MF) override;
};
} // End of namespace llvm
#endif
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