mirror of
https://github.com/llvm/llvm-project.git
synced 2025-05-16 11:56:08 +00:00
a65d8c5d72
Summary: AIX uses the existing EH infrastructure in clang and llvm. The major differences would be 1. AIX do not have CFI instructions. 2. AIX uses a new personality routine, named __xlcxx_personality_v1. It doesn't use the GCC personality rountine, because the interoperability is not there yet on AIX. 3. AIX do not use eh_frame sections. Instead, it would use a eh_info section (compat unwind section) to store the information about personality routine and LSDA data address. Reviewed By: daltenty, hubert.reinterpretcast Differential Revision: https://reviews.llvm.org/D91455
112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
//===-- 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;
|
|
/// Per-module flag to indicate if .cfi_section has beeen emitted.
|
|
bool hasEmittedCFISections;
|
|
|
|
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;
|
|
|
|
/// Per-function flag to indicate if .cfi_personality must be emitted.
|
|
bool forceEmitPersonality;
|
|
|
|
/// Per-function flag to indicate if .cfi_lsda should be emitted.
|
|
bool shouldEmitLSDA;
|
|
|
|
/// Per-function flag to indicate if frame moves info should be emitted.
|
|
bool shouldEmitMoves;
|
|
|
|
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 endModule() override {}
|
|
void beginFunction(const MachineFunction *MF) override {}
|
|
|
|
void endFunction(const MachineFunction *MF) override;
|
|
};
|
|
} // End of namespace llvm
|
|
|
|
#endif
|