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llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.h

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//===-- DWARFDebugInfoEntry.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_DWARFDebugInfoEntry_h_
#define SymbolFileDWARF_DWARFDebugInfoEntry_h_
#include "SymbolFileDWARF.h"
#include "llvm/ADT/SmallVector.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFAbbreviationDeclaration.h"
#include "DWARFDebugRanges.h"
#include <vector>
#include <map>
#include <set>
typedef std::map<const DWARFDebugInfoEntry*, dw_addr_t> DIEToAddressMap;
typedef DIEToAddressMap::iterator DIEToAddressMapIter;
typedef DIEToAddressMap::const_iterator DIEToAddressMapConstIter;
typedef std::map<dw_addr_t, const DWARFDebugInfoEntry*> AddressToDIEMap;
typedef AddressToDIEMap::iterator AddressToDIEMapIter;
typedef AddressToDIEMap::const_iterator AddressToDIEMapConstIter;
typedef std::map<dw_offset_t, dw_offset_t> DIEToDIEMap;
typedef DIEToDIEMap::iterator DIEToDIEMapIter;
typedef DIEToDIEMap::const_iterator DIEToDIEMapConstIter;
typedef std::map<uint32_t, const DWARFDebugInfoEntry*> UInt32ToDIEMap;
typedef UInt32ToDIEMap::iterator UInt32ToDIEMapIter;
typedef UInt32ToDIEMap::const_iterator UInt32ToDIEMapConstIter;
typedef std::multimap<uint32_t, const DWARFDebugInfoEntry*> UInt32ToDIEMMap;
typedef UInt32ToDIEMMap::iterator UInt32ToDIEMMapIter;
typedef UInt32ToDIEMMap::const_iterator UInt32ToDIEMMapConstIter;
#define DIE_SIBLING_IDX_BITSIZE 31
#define DIE_ABBR_IDX_BITSIZE 15
class DWARFDebugInfoEntry
{
public:
typedef std::vector<DWARFDebugInfoEntry> collection;
typedef collection::iterator iterator;
typedef collection::const_iterator const_iterator;
typedef std::vector<dw_offset_t> offset_collection;
typedef offset_collection::iterator offset_collection_iterator;
typedef offset_collection::const_iterator offset_collection_const_iterator;
class Attributes
{
public:
Attributes();
~Attributes();
void Append(const DWARFCompileUnit *cu, dw_offset_t attr_die_offset, dw_attr_t attr, dw_form_t form);
const DWARFCompileUnit * CompileUnitAtIndex(uint32_t i) const { return m_infos[i].cu; }
dw_offset_t DIEOffsetAtIndex(uint32_t i) const { return m_infos[i].die_offset; }
dw_attr_t AttributeAtIndex(uint32_t i) const { return m_infos[i].attr; }
dw_attr_t FormAtIndex(uint32_t i) const { return m_infos[i].form; }
bool ExtractFormValueAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, DWARFFormValue &form_value) const;
uint64_t FormValueAsUnsignedAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, uint64_t fail_value) const;
uint64_t FormValueAsUnsigned (SymbolFileDWARF* dwarf2Data, dw_attr_t attr, uint64_t fail_value) const;
uint32_t FindAttributeIndex(dw_attr_t attr) const;
bool ContainsAttribute(dw_attr_t attr) const;
bool RemoveAttribute(dw_attr_t attr);
void Clear() { m_infos.clear(); }
uint32_t Size() const { return m_infos.size(); }
protected:
struct Info
{
const DWARFCompileUnit *cu; // Keep the compile unit with each attribute in case we have DW_FORM_ref_addr values
dw_offset_t die_offset;
dw_attr_t attr;
dw_form_t form;
};
typedef llvm::SmallVector<Info, 32> collection;
collection m_infos;
};
struct CompareState
{
CompareState() :
die_offset_pairs()
{
assert(sizeof(dw_offset_t)*2 == sizeof(uint64_t));
}
bool AddTypePair(dw_offset_t a, dw_offset_t b)
{
uint64_t a_b_offsets = (uint64_t)a << 32 | (uint64_t)b;
// Return true if this type was inserted, false otherwise
return die_offset_pairs.insert(a_b_offsets).second;
}
std::set< uint64_t > die_offset_pairs;
};
DWARFDebugInfoEntry():
m_offset (DW_INVALID_OFFSET),
m_parent_idx (0),
m_sibling_idx (0),
m_empty_children(false),
m_abbr_idx (0),
m_has_children (false),
m_tag (0)
{
}
void Clear ()
{
m_offset = DW_INVALID_OFFSET;
m_parent_idx = 0;
m_sibling_idx = 0;
m_empty_children = false;
m_abbr_idx = 0;
m_has_children = false;
m_tag = 0;
}
bool Contains (const DWARFDebugInfoEntry *die) const;
void BuildAddressRangeTable(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
DWARFDebugAranges* debug_aranges) const;
void BuildFunctionAddressRangeTable(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
DWARFDebugAranges* debug_aranges) const;
bool FastExtract(
const lldb_private::DataExtractor& debug_info_data,
const DWARFCompileUnit* cu,
const uint8_t *fixed_form_sizes,
dw_offset_t* offset_ptr);
bool Extract(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
dw_offset_t* offset_ptr);
bool LookupAddress(
const dw_addr_t address,
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
DWARFDebugInfoEntry** function_die,
DWARFDebugInfoEntry** block_die);
size_t GetAttributes(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const uint8_t *fixed_form_sizes,
DWARFDebugInfoEntry::Attributes& attrs,
uint32_t curr_depth = 0) const; // "curr_depth" for internal use only, don't set this yourself!!!
dw_offset_t GetAttributeValue(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
DWARFFormValue& formValue,
dw_offset_t* end_attr_offset_ptr = NULL) const;
const char* GetAttributeValueAsString(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
const char* fail_value) const;
uint64_t GetAttributeValueAsUnsigned(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
uint64_t fail_value) const;
uint64_t GetAttributeValueAsReference(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
uint64_t fail_value) const;
int64_t GetAttributeValueAsSigned(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
int64_t fail_value) const;
dw_offset_t GetAttributeValueAsLocation(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_attr_t attr,
lldb_private::DataExtractor& data,
uint32_t &block_size) const;
const char* GetName(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu) const;
const char* GetMangledName(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
bool substitute_name_allowed = true) const;
const char* GetPubname(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu) const;
static bool GetName(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_offset_t die_offset,
lldb_private::Stream &s);
static bool AppendTypeName(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const dw_offset_t die_offset,
lldb_private::Stream &s);
const char * GetQualifiedName (
SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
std::string &storage) const;
const char * GetQualifiedName (
SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
const DWARFDebugInfoEntry::Attributes& attributes,
std::string &storage) const;
// static int Compare(
// SymbolFileDWARF* dwarf2Data,
// dw_offset_t a_die_offset,
// dw_offset_t b_die_offset,
// CompareState &compare_state,
// bool compare_siblings,
// bool compare_children);
//
// static int Compare(
// SymbolFileDWARF* dwarf2Data,
// DWARFCompileUnit* a_cu, const DWARFDebugInfoEntry* a_die,
// DWARFCompileUnit* b_cu, const DWARFDebugInfoEntry* b_die,
// CompareState &compare_state,
// bool compare_siblings,
// bool compare_children);
static bool OffsetLessThan (
const DWARFDebugInfoEntry& a,
const DWARFDebugInfoEntry& b);
void Dump(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
lldb_private::Stream &s,
uint32_t recurse_depth) const;
void DumpAncestry(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const DWARFDebugInfoEntry* oldest,
lldb_private::Stream &s,
uint32_t recurse_depth) const;
static void DumpAttribute(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const lldb_private::DataExtractor& debug_info_data,
uint32_t* offset_ptr,
lldb_private::Stream &s,
dw_attr_t attr,
dw_form_t form);
// This one dumps the comp unit name, objfile name and die offset for this die so the stream S.
void DumpLocation(
SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
lldb_private::Stream &s) const;
bool GetDIENamesAndRanges(
SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit* cu,
const char * &name,
const char * &mangled,
DWARFDebugRanges::RangeList& rangeList,
int& decl_file,
int& decl_line,
int& decl_column,
int& call_file,
int& call_line,
int& call_column,
lldb_private::DWARFExpression *frame_base = NULL) const;
const DWARFAbbreviationDeclaration*
GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data,
const DWARFCompileUnit *cu,
dw_offset_t &offset) const;
dw_tag_t
Tag () const
{
return m_tag;
}
bool
IsNULL() const
{
return m_abbr_idx == 0;
}
dw_offset_t
GetOffset () const
{
return m_offset;
}
void
SetOffset (dw_offset_t offset)
{
m_offset = offset;
}
bool
HasChildren () const
{
return m_has_children;
}
void
SetHasChildren (bool b)
{
m_has_children = b;
}
// We know we are kept in a vector of contiguous entries, so we know
// our parent will be some index behind "this".
DWARFDebugInfoEntry* GetParent() { return m_parent_idx > 0 ? this - m_parent_idx : NULL; }
const DWARFDebugInfoEntry* GetParent() const { return m_parent_idx > 0 ? this - m_parent_idx : NULL; }
// We know we are kept in a vector of contiguous entries, so we know
// our sibling will be some index after "this".
DWARFDebugInfoEntry* GetSibling() { return m_sibling_idx > 0 ? this + m_sibling_idx : NULL; }
const DWARFDebugInfoEntry* GetSibling() const { return m_sibling_idx > 0 ? this + m_sibling_idx : NULL; }
// We know we are kept in a vector of contiguous entries, so we know
// we don't need to store our child pointer, if we have a child it will
// be the next entry in the list...
DWARFDebugInfoEntry* GetFirstChild() { return (HasChildren() && !m_empty_children) ? this + 1 : NULL; }
const DWARFDebugInfoEntry* GetFirstChild() const { return (HasChildren() && !m_empty_children) ? this + 1 : NULL; }
const DWARFDebugInfoEntry* GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu) const;
const DWARFDebugInfoEntry* GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
DWARFCompileUnit* cu,
const DWARFDebugInfoEntry::Attributes& attributes) const;
void
SetParent (DWARFDebugInfoEntry* parent)
{
if (parent)
{
// We know we are kept in a vector of contiguous entries, so we know
// our parent will be some index behind "this".
m_parent_idx = this - parent;
}
else
m_parent_idx = 0;
}
void
SetSibling (DWARFDebugInfoEntry* sibling)
{
if (sibling)
{
// We know we are kept in a vector of contiguous entries, so we know
// our sibling will be some index after "this".
m_sibling_idx = sibling - this;
sibling->SetParent(GetParent());
}
else
m_sibling_idx = 0;
}
void
SetSiblingIndex (uint32_t idx)
{
m_sibling_idx = idx;
}
void
SetParentIndex (uint32_t idx)
{
m_parent_idx = idx;
}
bool
GetEmptyChildren () const
{
return m_empty_children;
}
void
SetEmptyChildren (bool b)
{
m_empty_children = b;
}
static void
DumpDIECollection (lldb_private::Stream &strm,
DWARFDebugInfoEntry::collection &die_collection);
protected:
dw_offset_t m_offset; // Offset within the .debug_info of the start of this entry
uint32_t m_parent_idx; // How many to subtract from "this" to get the parent. If zero this die has no parent
uint32_t m_sibling_idx:31, // How many to add to "this" to get the sibling.
m_empty_children:1; // If a DIE says it had children, yet it just contained a NULL tag, this will be set.
uint32_t m_abbr_idx:DIE_ABBR_IDX_BITSIZE,
m_has_children:1, // Set to 1 if this DIE has children
m_tag:16; // A copy of the DW_TAG value so we don't have to go through the compile unit abbrev table
};
#endif // SymbolFileDWARF_DWARFDebugInfoEntry_h_
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