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//===-- DWARFCompileUnit.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_DWARFCOMPILEUNIT_H
#define LLVM_DEBUGINFO_DWARFCOMPILEUNIT_H
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugInfoEntry.h"
#include <vector>
namespace llvm {
class DWARFContext;
class raw_ostream;
class DWARFCompileUnit {
DWARFContext &Context;
uint32_t Offset;
uint32_t Length;
uint16_t Version;
const DWARFAbbreviationDeclarationSet *Abbrevs;
uint8_t AddrSize;
uint64_t BaseAddr;
// The compile unit debug information entry item.
std::vector<DWARFDebugInfoEntryMinimal> DieArray;
public:
DWARFCompileUnit(DWARFContext &context) : Context(context) {
clear();
}
DWARFContext &getContext() const { return Context; }
DataExtractor getDebugInfoExtractor() const;
bool extract(DataExtractor debug_info, uint32_t* offset_ptr);
uint32_t extract(uint32_t offset, DataExtractor debug_info_data,
const DWARFAbbreviationDeclarationSet *abbrevs);
/// extractDIEsIfNeeded - Parses a compile unit and indexes its DIEs if it
/// hasn't already been done. Returns the number of DIEs parsed at this call.
size_t extractDIEsIfNeeded(bool cu_die_only);
void clear();
void dump(raw_ostream &OS);
uint32_t getOffset() const { return Offset; }
/// Size in bytes of the compile unit header.
uint32_t getSize() const { return 11; }
bool containsDIEOffset(uint32_t die_offset) const {
return die_offset >= getFirstDIEOffset() &&
die_offset < getNextCompileUnitOffset();
}
uint32_t getFirstDIEOffset() const { return Offset + getSize(); }
uint32_t getNextCompileUnitOffset() const { return Offset + Length + 4; }
/// Size in bytes of the .debug_info data associated with this compile unit.
size_t getDebugInfoSize() const { return Length + 4 - getSize(); }
uint32_t getLength() const { return Length; }
uint16_t getVersion() const { return Version; }
const DWARFAbbreviationDeclarationSet *getAbbreviations() const {
return Abbrevs;
}
uint8_t getAddressByteSize() const { return AddrSize; }
uint64_t getBaseAddress() const { return BaseAddr; }
void setBaseAddress(uint64_t base_addr) {
BaseAddr = base_addr;
}
const DWARFDebugInfoEntryMinimal *
getCompileUnitDIE(bool extract_cu_die_only = true) {
extractDIEsIfNeeded(extract_cu_die_only);
if (DieArray.empty())
return NULL;
return &DieArray[0];
}
/// setDIERelations - We read in all of the DIE entries into our flat list
/// of DIE entries and now we need to go back through all of them and set the
/// parent, sibling and child pointers for quick DIE navigation.
void setDIERelations();
void addDIE(DWARFDebugInfoEntryMinimal &die) {
// The average bytes per DIE entry has been seen to be
// around 14-20 so lets pre-reserve the needed memory for
// our DIE entries accordingly. Search forward for "Compute
// average bytes per DIE" to see #if'ed out code that does
// that determination.
// Only reserve the memory if we are adding children of
// the main compile unit DIE. The compile unit DIE is always
// the first entry, so if our size is 1, then we are adding
// the first compile unit child DIE and should reserve
// the memory.
if (DieArray.empty())
DieArray.reserve(getDebugInfoSize() / 14);
DieArray.push_back(die);
}
void clearDIEs(bool keep_compile_unit_die);
void buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
bool clear_dies_if_already_not_parsed);
/// getFunctionDIEForAddress - Returns pointer to parsed subprogram DIE,
/// address ranges of which contain the provided address,
/// or NULL if there is no such subprogram. The pointer
/// is valid until DWARFCompileUnit::clear() or clearDIEs() is called.
const DWARFDebugInfoEntryMinimal *getFunctionDIEForAddress(int64_t address);
};
}
#endif
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