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clang-p2996/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
Greg Clayton d4a2b37091 Huge memory and performance improvements in the DWARF parser. 
Address ranges are now split up into two different tables: 
- one in DWARFDebugInfo that is compile unit specific
- one in each DWARFCompileUnit that has exact function DIE offsets

This helps keep the size of the aranges down since the main table will get
uniqued and sorted and have consecutive ranges merged. We then only parse the
compile unit one on demand once we have determined that a compile unit contains
the address in question. We also now use the .debug_aranges section if there 
is one instead of always indexing the DWARF manually.

NameToDIE now uses a UniqueCStringMap<dw_offset> map instead of a std::map.
std::map is very bulky as each node has 3 pointers and the key and value types.
This gets our NameToDIE entry down to 12 bytes each instead of 48 which saves
us a lot of memory when we have very large DWARF.

DWARFDebugAranges now has a smaller footprint for each range it contains to 
save on memory.

llvm-svn: 139557
2011-09-12 23:21:58 +00:00

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//===-- SymbolFileDWARF.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_SymbolFileDWARF_h_
#define SymbolFileDWARF_SymbolFileDWARF_h_
// C Includes
// C++ Includes
#include <list>
#include <memory>
#include <map>
#include <vector>
// Other libraries and framework includes
#include "clang/AST/ExternalASTSource.h"
#include "llvm/ADT/DenseMap.h"
#include "lldb/Core/ClangForward.h"
#include "lldb/Core/ConstString.h"
#include "lldb/Core/dwarf.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/Flags.h"
#include "lldb/Core/UniqueCStringMap.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/SymbolContext.h"
// Project includes
#include "DWARFDefines.h"
#include "HashedNameToDIE.h"
#include "NameToDIE.h"
#include "UniqueDWARFASTType.h"
//----------------------------------------------------------------------
// Forward Declarations for this DWARF plugin
//----------------------------------------------------------------------
class DWARFAbbreviationDeclaration;
class DWARFAbbreviationDeclarationSet;
class DWARFCompileUnit;
class DWARFDebugAbbrev;
class DWARFDebugAranges;
class DWARFDebugInfo;
class DWARFDebugInfoEntry;
class DWARFDebugLine;
class DWARFDebugPubnames;
class DWARFDebugRanges;
class DWARFDIECollection;
class DWARFFormValue;
class SymbolFileDWARFDebugMap;
class SymbolFileDWARF : public lldb_private::SymbolFile
{
public:
friend class SymbolFileDWARFDebugMap;
//------------------------------------------------------------------
// Static Functions
//------------------------------------------------------------------
static void
Initialize();
static void
Terminate();
static const char *
GetPluginNameStatic();
static const char *
GetPluginDescriptionStatic();
static lldb_private::SymbolFile*
CreateInstance (lldb_private::ObjectFile* obj_file);
//------------------------------------------------------------------
// Constructors and Destructors
//------------------------------------------------------------------
SymbolFileDWARF(lldb_private::ObjectFile* ofile);
virtual ~SymbolFileDWARF();
virtual uint32_t GetAbilities ();
virtual void InitializeObject();
//------------------------------------------------------------------
// Compile Unit function calls
//------------------------------------------------------------------
virtual uint32_t GetNumCompileUnits();
virtual lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t index);
virtual size_t ParseCompileUnitFunctions (const lldb_private::SymbolContext& sc);
virtual bool ParseCompileUnitLineTable (const lldb_private::SymbolContext& sc);
virtual bool ParseCompileUnitSupportFiles (const lldb_private::SymbolContext& sc, lldb_private::FileSpecList& support_files);
virtual size_t ParseFunctionBlocks (const lldb_private::SymbolContext& sc);
virtual size_t ParseTypes (const lldb_private::SymbolContext& sc);
virtual size_t ParseVariablesForContext (const lldb_private::SymbolContext& sc);
virtual lldb_private::Type* ResolveTypeUID(lldb::user_id_t type_uid);
virtual lldb::clang_type_t ResolveClangOpaqueTypeDefinition (lldb::clang_type_t clang_opaque_type);
virtual lldb_private::Type* ResolveType (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed = true);
virtual clang::DeclContext* GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid);
virtual clang::DeclContext* GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid);
virtual uint32_t ResolveSymbolContext (const lldb_private::Address& so_addr, uint32_t resolve_scope, lldb_private::SymbolContext& sc);
virtual uint32_t ResolveSymbolContext (const lldb_private::FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, lldb_private::SymbolContextList& sc_list);
virtual uint32_t FindGlobalVariables(const lldb_private::ConstString &name, bool append, uint32_t max_matches, lldb_private::VariableList& variables);
virtual uint32_t FindGlobalVariables(const lldb_private::RegularExpression& regex, bool append, uint32_t max_matches, lldb_private::VariableList& variables);
virtual uint32_t FindFunctions(const lldb_private::ConstString &name, uint32_t name_type_mask, bool append, lldb_private::SymbolContextList& sc_list);
virtual uint32_t FindFunctions(const lldb_private::RegularExpression& regex, bool append, lldb_private::SymbolContextList& sc_list);
virtual uint32_t FindTypes (const lldb_private::SymbolContext& sc, const lldb_private::ConstString &name, bool append, uint32_t max_matches, lldb_private::TypeList& types);
virtual lldb_private::TypeList *
GetTypeList ();
virtual lldb_private::ClangASTContext &
GetClangASTContext ();
virtual lldb_private::ClangNamespaceDecl
FindNamespace (const lldb_private::SymbolContext& sc,
const lldb_private::ConstString &name);
//------------------------------------------------------------------
// ClangASTContext callbacks for external source lookups.
//------------------------------------------------------------------
static void
CompleteTagDecl (void *baton, clang::TagDecl *);
static void
CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *);
static void
FindExternalVisibleDeclsByName (void *baton,
const clang::DeclContext *DC,
clang::DeclarationName Name,
llvm::SmallVectorImpl <clang::NamedDecl *> *results);
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
virtual const char *
GetPluginName();
virtual const char *
GetShortPluginName();
virtual uint32_t
GetPluginVersion();
// Approach 2 - count + accessor
// Index compile units would scan the initial compile units and register
// them with the module. This would only be done on demand if and only if
// the compile units were needed.
//virtual size_t GetCompUnitCount() = 0;
//virtual CompUnitSP GetCompUnitAtIndex(size_t cu_idx) = 0;
const lldb_private::DataExtractor& get_debug_abbrev_data ();
const lldb_private::DataExtractor& get_debug_aranges_data ();
const lldb_private::DataExtractor& get_debug_frame_data ();
const lldb_private::DataExtractor& get_debug_info_data ();
const lldb_private::DataExtractor& get_debug_line_data ();
const lldb_private::DataExtractor& get_debug_loc_data ();
const lldb_private::DataExtractor& get_debug_ranges_data ();
const lldb_private::DataExtractor& get_debug_str_data ();
const lldb_private::DataExtractor& get_debug_names_data ();
const lldb_private::DataExtractor& get_debug_types_data ();
DWARFDebugAbbrev* DebugAbbrev();
const DWARFDebugAbbrev* DebugAbbrev() const;
DWARFDebugInfo* DebugInfo();
const DWARFDebugInfo* DebugInfo() const;
DWARFDebugRanges* DebugRanges();
const DWARFDebugRanges* DebugRanges() const;
const lldb_private::DataExtractor&
GetCachedSectionData (uint32_t got_flag,
lldb::SectionType sect_type,
lldb_private::DataExtractor &data);
static bool
SupportedVersion(uint16_t version);
clang::DeclContext *
GetClangDeclContextForDIE (const lldb_private::SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die);
clang::DeclContext *
GetClangDeclContextForDIEOffset (const lldb_private::SymbolContext &sc, dw_offset_t die_offset);
clang::DeclContext *
GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die);
clang::DeclContext *
GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset);
void
SearchDeclContext (const clang::DeclContext *decl_context,
const char *name,
llvm::SmallVectorImpl <clang::NamedDecl *> *results);
lldb_private::Flags&
GetFlags ()
{
return m_flags;
}
const lldb_private::Flags&
GetFlags () const
{
return m_flags;
}
bool
HasForwardDeclForClangType (lldb::clang_type_t clang_type);
protected:
enum
{
flagsGotDebugAbbrevData = (1 << 0),
flagsGotDebugArangesData = (1 << 1),
flagsGotDebugFrameData = (1 << 2),
flagsGotDebugInfoData = (1 << 3),
flagsGotDebugLineData = (1 << 4),
flagsGotDebugLocData = (1 << 5),
flagsGotDebugMacInfoData = (1 << 6),
flagsGotDebugPubNamesData = (1 << 7),
flagsGotDebugPubTypesData = (1 << 8),
flagsGotDebugRangesData = (1 << 9),
flagsGotDebugStrData = (1 << 10),
flagsGotDebugNamesData = (1 << 11),
flagsGotDebugTypesData = (1 << 12)
};
DISALLOW_COPY_AND_ASSIGN (SymbolFileDWARF);
bool ParseCompileUnit (DWARFCompileUnit* cu, lldb::CompUnitSP& compile_unit_sp);
DWARFCompileUnit* GetDWARFCompileUnitForUID(lldb::user_id_t cu_uid);
DWARFCompileUnit* GetNextUnparsedDWARFCompileUnit(DWARFCompileUnit* prev_cu);
lldb_private::CompileUnit* GetCompUnitForDWARFCompUnit(DWARFCompileUnit* cu, uint32_t cu_idx = UINT32_MAX);
bool GetFunction (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* func_die, lldb_private::SymbolContext& sc);
lldb_private::Function * ParseCompileUnitFunction (const lldb_private::SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die);
size_t ParseFunctionBlocks (const lldb_private::SymbolContext& sc,
lldb_private::Block *parent_block,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
lldb::addr_t subprogram_low_pc,
uint32_t depth);
size_t ParseTypes (const lldb_private::SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool parse_siblings, bool parse_children);
lldb::TypeSP ParseType (const lldb_private::SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new);
lldb::VariableSP ParseVariableDIE(
const lldb_private::SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
const lldb::addr_t func_low_pc);
size_t ParseVariables(
const lldb_private::SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const lldb::addr_t func_low_pc,
const DWARFDebugInfoEntry *die,
bool parse_siblings,
bool parse_children,
lldb_private::VariableList* cc_variable_list = NULL);
size_t ParseChildMembers(
const lldb_private::SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
lldb::clang_type_t class_clang_type,
const lldb::LanguageType class_language,
std::vector<clang::CXXBaseSpecifier *>& base_classes,
std::vector<int>& member_accessibilities,
DWARFDIECollection& member_function_dies,
lldb::AccessType &default_accessibility,
bool &is_a_class);
size_t ParseChildParameters(
const lldb_private::SymbolContext& sc,
clang::DeclContext *containing_decl_ctx,
lldb::TypeSP& type_sp,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die,
bool skip_artificial,
bool &is_static,
lldb_private::TypeList* type_list,
std::vector<lldb::clang_type_t>& function_args,
std::vector<clang::ParmVarDecl*>& function_param_decls,
unsigned &type_quals);
size_t ParseChildEnumerators(
const lldb_private::SymbolContext& sc,
lldb::clang_type_t enumerator_qual_type,
uint32_t enumerator_byte_size,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *enum_die);
void ParseChildArrayInfo(
const lldb_private::SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die,
int64_t& first_index,
std::vector<uint64_t>& element_orders,
uint32_t& byte_stride,
uint32_t& bit_stride);
uint32_t ResolveFunctions (
const DIEArray &die_offsets,
lldb_private::SymbolContextList& sc_list);
void FindFunctions(
const lldb_private::ConstString &name,
const NameToDIE &name_to_die,
lldb_private::SymbolContextList& sc_list);
void FindFunctions (
const lldb_private::RegularExpression &regex,
const NameToDIE &name_to_die,
lldb_private::SymbolContextList& sc_list);
lldb::TypeSP FindDefinitionTypeForDIE (
DWARFCompileUnit* cu,
const DWARFDebugInfoEntry *die,
const lldb_private::ConstString &type_name);
lldb::TypeSP GetTypeForDIE (DWARFCompileUnit *cu,
const DWARFDebugInfoEntry* die);
uint32_t FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, lldb_private::TypeList& types);
void Index();
void DumpIndexes();
void SetDebugMapSymfile (SymbolFileDWARFDebugMap *debug_map_symfile)
{
m_debug_map_symfile = debug_map_symfile;
}
const DWARFDebugInfoEntry *
FindBlockContainingSpecification (dw_offset_t func_die_offset,
dw_offset_t spec_block_die_offset,
DWARFCompileUnit **dwarf_cu_handle);
const DWARFDebugInfoEntry *
FindBlockContainingSpecification (DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
dw_offset_t spec_block_die_offset,
DWARFCompileUnit **dwarf_cu_handle);
clang::NamespaceDecl *
ResolveNamespaceDIE (DWARFCompileUnit *curr_cu, const DWARFDebugInfoEntry *die);
UniqueDWARFASTTypeMap &
GetUniqueDWARFASTTypeMap ();
void LinkDeclContextToDIE (clang::DeclContext *decl_ctx,
const DWARFDebugInfoEntry *die)
{
m_die_to_decl_ctx[die] = decl_ctx;
m_decl_ctx_to_die[decl_ctx] = die;
}
void
ReportError (const char *format, ...);
SymbolFileDWARFDebugMap * m_debug_map_symfile;
clang::TranslationUnitDecl * m_clang_tu_decl;
lldb_private::Flags m_flags;
lldb_private::DataExtractor m_dwarf_data;
lldb_private::DataExtractor m_data_debug_abbrev;
lldb_private::DataExtractor m_data_debug_aranges;
lldb_private::DataExtractor m_data_debug_frame;
lldb_private::DataExtractor m_data_debug_info;
lldb_private::DataExtractor m_data_debug_line;
lldb_private::DataExtractor m_data_debug_loc;
lldb_private::DataExtractor m_data_debug_ranges;
lldb_private::DataExtractor m_data_debug_str;
lldb_private::DataExtractor m_data_debug_names;
lldb_private::DataExtractor m_data_debug_types;
// The auto_ptr items below are generated on demand if and when someone accesses
// them through a non const version of this class.
std::auto_ptr<DWARFDebugAbbrev> m_abbr;
std::auto_ptr<DWARFDebugInfo> m_info;
std::auto_ptr<DWARFDebugLine> m_line;
HashedNameToDIE m_debug_names;
NameToDIE m_function_basename_index; // All concrete functions
NameToDIE m_function_fullname_index; // All concrete functions
NameToDIE m_function_method_index; // All inlined functions
NameToDIE m_function_selector_index; // All method names for functions of classes
NameToDIE m_objc_class_selectors_index; // Given a class name, find all selectors for the class
NameToDIE m_global_index; // Global and static variables
NameToDIE m_type_index; // All type DIE offsets
NameToDIE m_namespace_index; // All type DIE offsets
bool m_indexed:1,
m_is_external_ast_source:1;
std::auto_ptr<DWARFDebugRanges> m_ranges;
UniqueDWARFASTTypeMap m_unique_ast_type_map;
typedef llvm::DenseMap<const DWARFDebugInfoEntry *, clang::DeclContext *> DIEToDeclContextMap;
typedef llvm::DenseMap<const clang::DeclContext *, const DWARFDebugInfoEntry *> DeclContextToDIEMap;
typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb_private::Type *> DIEToTypePtr;
typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb::VariableSP> DIEToVariableSP;
typedef llvm::DenseMap<const DWARFDebugInfoEntry *, lldb::clang_type_t> DIEToClangType;
typedef llvm::DenseMap<lldb::clang_type_t, const DWARFDebugInfoEntry *> ClangTypeToDIE;
DIEToDeclContextMap m_die_to_decl_ctx;
DeclContextToDIEMap m_decl_ctx_to_die;
DIEToTypePtr m_die_to_type;
DIEToVariableSP m_die_to_variable_sp;
DIEToClangType m_forward_decl_die_to_clang_type;
ClangTypeToDIE m_forward_decl_clang_type_to_die;
};
#endif // SymbolFileDWARF_SymbolFileDWARF_h_
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