| //===-- DWARFFormValue.h ----------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_DEBUGINFO_DWARFFORMVALUE_H |
| #define LLVM_DEBUGINFO_DWARFFORMVALUE_H |
| |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/ADT/Optional.h" |
| #include "llvm/Support/DataExtractor.h" |
| |
| namespace llvm { |
| |
| class DWARFUnit; |
| class raw_ostream; |
| |
| class DWARFFormValue { |
| public: |
| enum FormClass { |
| FC_Unknown, |
| FC_Address, |
| FC_Block, |
| FC_Constant, |
| FC_String, |
| FC_Flag, |
| FC_Reference, |
| FC_Indirect, |
| FC_SectionOffset, |
| FC_Exprloc |
| }; |
| |
| private: |
| struct ValueType { |
| ValueType() : data(nullptr) { |
| uval = 0; |
| } |
| |
| union { |
| uint64_t uval; |
| int64_t sval; |
| const char* cstr; |
| }; |
| const uint8_t* data; |
| }; |
| |
| uint16_t Form; // Form for this value. |
| ValueType Value; // Contains all data for the form. |
| |
| public: |
| DWARFFormValue(uint16_t Form = 0) : Form(Form) {} |
| uint16_t getForm() const { return Form; } |
| bool isFormClass(FormClass FC) const; |
| |
| void dump(raw_ostream &OS, const DWARFUnit *U) const; |
| bool extractValue(DataExtractor data, uint32_t *offset_ptr, |
| const DWARFUnit *u); |
| bool isInlinedCStr() const { |
| return Value.data != nullptr && Value.data == (const uint8_t*)Value.cstr; |
| } |
| |
| /// getAsFoo functions below return the extracted value as Foo if only |
| /// DWARFFormValue has form class is suitable for representing Foo. |
| Optional<uint64_t> getAsReference(const DWARFUnit *U) const; |
| Optional<uint64_t> getAsUnsignedConstant() const; |
| Optional<const char *> getAsCString(const DWARFUnit *U) const; |
| Optional<uint64_t> getAsAddress(const DWARFUnit *U) const; |
| Optional<uint64_t> getAsSectionOffset() const; |
| |
| bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr, |
| const DWARFUnit *u) const; |
| static bool skipValue(uint16_t form, DataExtractor debug_info_data, |
| uint32_t *offset_ptr, const DWARFUnit *u); |
| |
| static ArrayRef<uint8_t> getFixedFormSizes(uint8_t AddrSize, |
| uint16_t Version); |
| }; |
| |
| } |
| |
| #endif |