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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 LLVM_DEBUGINFO_DWARFFORMVALUE_H
#define LLVM_DEBUGINFO_DWARFFORMVALUE_H
#include "llvm/Support/DataExtractor.h"
namespace llvm {
class DWARFCompileUnit;
class raw_ostream;
class DWARFFormValue {
public:
struct ValueType {
ValueType() : data(NULL) {
uval = 0;
}
union {
uint64_t uval;
int64_t sval;
const char* cstr;
};
const uint8_t* data;
};
enum {
eValueTypeInvalid = 0,
eValueTypeUnsigned,
eValueTypeSigned,
eValueTypeCStr,
eValueTypeBlock
};
private:
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; }
const ValueType& value() const { return Value; }
void dump(raw_ostream &OS, const DWARFCompileUnit* cu) const;
bool extractValue(DataExtractor data, uint32_t *offset_ptr,
const DWARFCompileUnit *cu);
bool isInlinedCStr() const {
return Value.data != NULL && Value.data == (uint8_t*)Value.cstr;
}
const uint8_t *BlockData() const;
uint64_t getReference(const DWARFCompileUnit* cu) const;
/// Resolve any compile unit specific references so that we don't need
/// the compile unit at a later time in order to work with the form
/// value.
bool resolveCompileUnitReferences(const DWARFCompileUnit* cu);
uint64_t getUnsigned() const { return Value.uval; }
int64_t getSigned() const { return Value.sval; }
const char *getAsCString(const DataExtractor *debug_str_data_ptr) const;
bool skipValue(DataExtractor debug_info_data, uint32_t *offset_ptr,
const DWARFCompileUnit *cu) const;
static bool skipValue(uint16_t form, DataExtractor debug_info_data,
uint32_t *offset_ptr, const DWARFCompileUnit *cu);
static bool isBlockForm(uint16_t form);
static bool isDataForm(uint16_t form);
static const uint8_t *getFixedFormSizesForAddressSize(uint8_t addr_size);
};
}
#endif
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