1 //===-- DWARFFormValue.h ----------------------------------------*- 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 #ifndef LLVM_DEBUGINFO_DWARFFORMVALUE_H
11 #define LLVM_DEBUGINFO_DWARFFORMVALUE_H
13 #include "llvm/ADT/Optional.h"
14 #include "llvm/Support/DataExtractor.h"
21 class DWARFFormValue {
38 ValueType() : data(NULL) {
50 uint16_t Form; // Form for this value.
51 ValueType Value; // Contains all data for the form.
54 DWARFFormValue(uint16_t Form = 0) : Form(Form) {}
55 uint16_t getForm() const { return Form; }
56 bool isFormClass(FormClass FC) const;
58 void dump(raw_ostream &OS, const DWARFUnit *U) const;
59 bool extractValue(DataExtractor data, uint32_t *offset_ptr,
61 bool isInlinedCStr() const {
62 return Value.data != NULL && Value.data == (const uint8_t*)Value.cstr;
65 /// getAsFoo functions below return the extracted value as Foo if only
66 /// DWARFFormValue has form class is suitable for representing Foo.
67 Optional<uint64_t> getAsReference(const DWARFUnit *U) const;
68 Optional<uint64_t> getAsUnsignedConstant() const;
69 Optional<const char *> getAsCString(const DWARFUnit *U) const;
70 Optional<uint64_t> getAsAddress(const DWARFUnit *U) const;
71 Optional<uint64_t> getAsSectionOffset() const;
73 bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr,
74 const DWARFUnit *u) const;
75 static bool skipValue(uint16_t form, DataExtractor debug_info_data,
76 uint32_t *offset_ptr, const DWARFUnit *u);
78 static const uint8_t *getFixedFormSizes(uint8_t AddrSize, uint16_t Version);