1251607Sdim//===-- DWARFFormValue.h ----------------------------------------*- C++ -*-===// 2251607Sdim// 3251607Sdim// The LLVM Compiler Infrastructure 4251607Sdim// 5251607Sdim// This file is distributed under the University of Illinois Open Source 6251607Sdim// License. See LICENSE.TXT for details. 7251607Sdim// 8251607Sdim//===----------------------------------------------------------------------===// 9251607Sdim 10251607Sdim#ifndef LLVM_DEBUGINFO_DWARFFORMVALUE_H 11251607Sdim#define LLVM_DEBUGINFO_DWARFFORMVALUE_H 12251607Sdim 13263508Sdim#include "llvm/ADT/ArrayRef.h" 14263508Sdim#include "llvm/ADT/Optional.h" 15251607Sdim#include "llvm/Support/DataExtractor.h" 16251607Sdim 17251607Sdimnamespace llvm { 18251607Sdim 19263508Sdimclass DWARFUnit; 20251607Sdimclass raw_ostream; 21251607Sdim 22251607Sdimclass DWARFFormValue { 23251607Sdimpublic: 24263508Sdim enum FormClass { 25263508Sdim FC_Unknown, 26263508Sdim FC_Address, 27263508Sdim FC_Block, 28263508Sdim FC_Constant, 29263508Sdim FC_String, 30263508Sdim FC_Flag, 31263508Sdim FC_Reference, 32263508Sdim FC_Indirect, 33263508Sdim FC_SectionOffset, 34263508Sdim FC_Exprloc 35263508Sdim }; 36263508Sdim 37263508Sdimprivate: 38251607Sdim struct ValueType { 39251607Sdim ValueType() : data(NULL) { 40251607Sdim uval = 0; 41251607Sdim } 42251607Sdim 43251607Sdim union { 44251607Sdim uint64_t uval; 45251607Sdim int64_t sval; 46251607Sdim const char* cstr; 47251607Sdim }; 48251607Sdim const uint8_t* data; 49251607Sdim }; 50251607Sdim 51251607Sdim uint16_t Form; // Form for this value. 52251607Sdim ValueType Value; // Contains all data for the form. 53251607Sdim 54251607Sdimpublic: 55263508Sdim DWARFFormValue(uint16_t Form = 0) : Form(Form) {} 56251607Sdim uint16_t getForm() const { return Form; } 57263508Sdim bool isFormClass(FormClass FC) const; 58263508Sdim 59263508Sdim void dump(raw_ostream &OS, const DWARFUnit *U) const; 60251607Sdim bool extractValue(DataExtractor data, uint32_t *offset_ptr, 61263508Sdim const DWARFUnit *u); 62251607Sdim bool isInlinedCStr() const { 63251607Sdim return Value.data != NULL && Value.data == (const uint8_t*)Value.cstr; 64251607Sdim } 65251607Sdim 66263508Sdim /// getAsFoo functions below return the extracted value as Foo if only 67263508Sdim /// DWARFFormValue has form class is suitable for representing Foo. 68263508Sdim Optional<uint64_t> getAsReference(const DWARFUnit *U) const; 69263508Sdim Optional<uint64_t> getAsUnsignedConstant() const; 70263508Sdim Optional<const char *> getAsCString(const DWARFUnit *U) const; 71263508Sdim Optional<uint64_t> getAsAddress(const DWARFUnit *U) const; 72263508Sdim Optional<uint64_t> getAsSectionOffset() const; 73263508Sdim 74251607Sdim bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr, 75263508Sdim const DWARFUnit *u) const; 76251607Sdim static bool skipValue(uint16_t form, DataExtractor debug_info_data, 77263508Sdim uint32_t *offset_ptr, const DWARFUnit *u); 78263508Sdim 79263508Sdim static ArrayRef<uint8_t> getFixedFormSizes(uint8_t AddrSize, 80263508Sdim uint16_t Version); 81251607Sdim}; 82251607Sdim 83251607Sdim} 84251607Sdim 85251607Sdim#endif 86