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79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
//===-- DWARFFormValue.h ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_DWARFFORMVALUE_H
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#define LLVM_DEBUGINFO_DWARFFORMVALUE_H
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#include "llvm/Support/DataExtractor.h"
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namespace llvm {
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class DWARFCompileUnit;
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class raw_ostream;
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class DWARFFormValue {
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public:
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struct ValueType {
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ValueType() : data(NULL) {
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uval = 0;
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}
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union {
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uint64_t uval;
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int64_t sval;
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const char* cstr;
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};
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const uint8_t* data;
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};
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enum {
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eValueTypeInvalid = 0,
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eValueTypeUnsigned,
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eValueTypeSigned,
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eValueTypeCStr,
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eValueTypeBlock
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};
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private:
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uint16_t Form; // Form for this value.
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ValueType Value; // Contains all data for the form.
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public:
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DWARFFormValue(uint16_t form = 0) : Form(form) {}
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uint16_t getForm() const { return Form; }
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const ValueType& value() const { return Value; }
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void dump(raw_ostream &OS, const DWARFCompileUnit* cu) const;
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bool extractValue(DataExtractor data, uint32_t *offset_ptr,
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const DWARFCompileUnit *cu);
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bool isInlinedCStr() const {
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return Value.data != NULL && Value.data == (uint8_t*)Value.cstr;
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}
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const uint8_t *BlockData() const;
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uint64_t getReference(const DWARFCompileUnit* cu) const;
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/// Resolve any compile unit specific references so that we don't need
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/// the compile unit at a later time in order to work with the form
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/// value.
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bool resolveCompileUnitReferences(const DWARFCompileUnit* cu);
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uint64_t getUnsigned() const { return Value.uval; }
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int64_t getSigned() const { return Value.sval; }
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const char *getAsCString(const DataExtractor *debug_str_data_ptr) const;
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bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr,
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const DWARFCompileUnit *cu) const;
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static bool skipValue(uint16_t form, DataExtractor debug_info_data,
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uint32_t *offset_ptr, const DWARFCompileUnit *cu);
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static bool isBlockForm(uint16_t form);
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static bool isDataForm(uint16_t form);
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static const uint8_t *getFixedFormSizesForAddressSize(uint8_t addr_size);
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};
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}
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#endif
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