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//===-- 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 SymbolFileDWARF_DWARFFormValue_h_
#define SymbolFileDWARF_DWARFFormValue_h_
#include <stddef.h> // for NULL
#include "DWARFDataExtractor.h"
class DWARFCompileUnit;
class DWARFFormValue
{
public:
typedef struct ValueTypeTag
{
ValueTypeTag() :
value(),
data(NULL)
{
value.uval = 0;
}
union
{
uint64_t uval;
int64_t sval;
const char* cstr;
} value;
const uint8_t* data;
} ValueType;
class FixedFormSizes
{
public:
FixedFormSizes() :
m_fix_sizes(nullptr), m_size(0)
{}
FixedFormSizes(const uint8_t* fix_sizes, size_t size) :
m_fix_sizes(fix_sizes), m_size(size)
{}
uint8_t
GetSize(uint32_t index) const
{
return index < m_size ? m_fix_sizes[index] : 0;
}
bool
Empty() const
{
return m_size == 0;
}
private:
const uint8_t* m_fix_sizes;
size_t m_size;
};
enum
{
eValueTypeInvalid = 0,
eValueTypeUnsigned,
eValueTypeSigned,
eValueTypeCStr,
eValueTypeBlock
};
DWARFFormValue();
DWARFFormValue(const DWARFCompileUnit* cu, dw_form_t form);
const DWARFCompileUnit* GetCompileUnit () const { return m_cu; }
void SetCompileUnit (const DWARFCompileUnit* cu) { m_cu = cu; }
dw_form_t Form() const { return m_form; }
void SetForm(dw_form_t form) { m_form = form; }
const ValueType& Value() const { return m_value; }
void Dump(lldb_private::Stream &s) const;
bool ExtractValue(const lldb_private::DWARFDataExtractor& data,
lldb::offset_t* offset_ptr);
const uint8_t* BlockData() const;
uint64_t Reference() const;
uint64_t Reference (dw_offset_t offset) const;
bool Boolean() const { return m_value.value.uval != 0; }
uint64_t Unsigned() const { return m_value.value.uval; }
void SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
int64_t Signed() const { return m_value.value.sval; }
void SetSigned(int64_t sval) { m_value.value.sval = sval; }
const char* AsCString() const;
dw_addr_t Address() const;
bool IsValid() const { return m_form != 0; }
bool SkipValue(const lldb_private::DWARFDataExtractor& debug_info_data, lldb::offset_t *offset_ptr) const;
static bool SkipValue(const dw_form_t form, const lldb_private::DWARFDataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu);
static bool IsBlockForm(const dw_form_t form);
static bool IsDataForm(const dw_form_t form);
static FixedFormSizes GetFixedFormSizesForAddressSize (uint8_t addr_size, bool is_dwarf64);
static int Compare (const DWARFFormValue& a,
const DWARFFormValue& b);
protected:
const DWARFCompileUnit* m_cu; // Compile unit for this form
dw_form_t m_form; // Form for this value
ValueType m_value; // Contains all data for the form
};
#endif // SymbolFileDWARF_DWARFFormValue_h_
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