blob: 668bd5a568afe092fa553ed46b4c05982b6fc477 [file] [log] [blame]
//===-- DWARFFormValue.h ----------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef SymbolFileDWARF_DWARFFormValue_h_
#define SymbolFileDWARF_DWARFFormValue_h_
#include "DWARFDataExtractor.h"
#include <stddef.h>
class DWARFUnit;
class SymbolFileDWARF;
class DWARFDIE;
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() = default;
DWARFFormValue(const DWARFUnit *unit) : m_unit(unit) {}
DWARFFormValue(const DWARFUnit *unit, dw_form_t form)
: m_unit(unit), m_form(form) {}
void SetUnit(const DWARFUnit *unit) { m_unit = unit; }
dw_form_t Form() const { return m_form; }
dw_form_t& FormRef() { return m_form; }
void SetForm(dw_form_t form) { m_form = form; }
const ValueType &Value() const { return m_value; }
ValueType &ValueRef() { return m_value; }
void SetValue(const ValueType &val) { m_value = val; }
void Dump(lldb_private::Stream &s) const;
bool ExtractValue(const lldb_private::DWARFDataExtractor &data,
lldb::offset_t *offset_ptr);
const uint8_t *BlockData() const;
DWARFDIE 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 DWARFUnit *unit);
static bool IsBlockForm(const dw_form_t form);
static bool IsDataForm(const dw_form_t form);
static FixedFormSizes GetFixedFormSizesForAddressSize(uint8_t addr_size);
static int Compare(const DWARFFormValue &a, const DWARFFormValue &b);
void Clear();
static bool FormIsSupported(dw_form_t form);
protected:
// Compile unit where m_value was located.
// It may be different from compile unit where m_value refers to.
const DWARFUnit *m_unit = nullptr; // Unit for this form
dw_form_t m_form = 0; // Form for this value
ValueType m_value; // Contains all data for the form
};
#endif // SymbolFileDWARF_DWARFFormValue_h_