ClangASTImporter.cpp File Reference

#include "lldb/Core/Module.h"
#include "lldb/Utility/LLDBAssert.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/RecordLayout.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Sema.h"
#include "llvm/Support/raw_ostream.h"
#include "Plugins/ExpressionParser/Clang/ClangASTImporter.h"
#include "Plugins/ExpressionParser/Clang/ClangASTMetadata.h"
#include "Plugins/ExpressionParser/Clang/ClangASTSource.h"
#include "Plugins/ExpressionParser/Clang/ClangExternalASTSourceCallbacks.h"
#include "Plugins/ExpressionParser/Clang/ClangUtil.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include <memory>
#include <optional>
#include <type_traits>

Go to the source code of this file.

Classes
class	DeclContextOverride
struct	DeclContextOverride::Backup

Functions
template<class D , class O >
static bool	ImportOffsetMap (clang::ASTContext *dest_ctx, llvm::DenseMap< const D *, O > &destination_map, llvm::DenseMap< const D *, O > &source_map, ClangASTImporter &importer)
	Copy layout information from source_map to the destination_map.
template<bool IsVirtual>
bool	ExtractBaseOffsets (const ASTRecordLayout &record_layout, DeclFromUser< const CXXRecordDecl > &record, llvm::DenseMap< const clang::CXXRecordDecl *, clang::CharUnits > &base_offsets)
	Given a CXXRecordDecl, will calculate and populate base_offsets with the integral offsets of any of its (possibly virtual) base classes.
static void	MaybeCompleteReturnType (ClangASTImporter &importer, CXXMethodDecl *to_method)
	Takes a CXXMethodDecl and completes the return type if necessary.
static OptionalClangModuleID	RemapModule (OptionalClangModuleID from_id, ClangExternalASTSourceCallbacks &from_source, ClangExternalASTSourceCallbacks &to_source)
	Recreate a module with its parents in to_source and return its id.

Function Documentation

ExtractBaseOffsets()

template<bool IsVirtual>

bool ExtractBaseOffsets	(	const ASTRecordLayout &	record_layout,
		DeclFromUser< const CXXRecordDecl > &	record,
		llvm::DenseMap< const clang::CXXRecordDecl *, clang::CharUnits > &	base_offsets
	)

Given a CXXRecordDecl, will calculate and populate base_offsets with the integral offsets of any of its (possibly virtual) base classes.

Parameters

[in]	record_layout	ASTRecordLayout of record.
[in]	record	The record that we're calculating the base layouts of.
[out]	base_offsets	Map of base-class decl to integral offset which this function will fill in.

Returns

On success, will return 'true' and the offsets in base_offsets are usable.

Definition at line 581 of file ClangASTImporter.cpp.

References lldb_private::TaggedASTDecl< D >::decl, and lldb_private::TaggedASTDecl< D >::IsInvalid().

ImportOffsetMap()

template<class D , class O >

static bool ImportOffsetMap ( clang::ASTContext *  dest_ctx, llvm::DenseMap< const D *, O > &  destination_map, llvm::DenseMap< const D *, O > &  source_map, ClangASTImporter &  importer  )

static

Copy layout information from source_map to the destination_map.

In the process of copying over layout info, we may need to import decls from the source_map. This function will use the supplied importer to import the necessary decls into dest_ctx.

Parameters

[in,out]	dest_ctx	Destination ASTContext into which we import decls from the source_map.
[out]	destination_map	A map from decls in dest_ctx to an integral offest, which will be copies of the decl/offest pairs in source_map if successful.
[in]	source_map	A map from decls to integral offests. These will be copied into destination_map.
[in,out]	importer	Used to import decls into dest_ctx.

Returns

On success, will return 'true' and the offsets in destination_map are usable copies of source_map.

Definition at line 542 of file ClangASTImporter.cpp.

References lldb_private::TaggedASTDecl< D >::decl, lldb_private::DeclFromUser< D >::Import(), and lldb_private::TaggedASTDecl< D >::IsInvalid().

Referenced by lldb_private::ClangASTImporter::importRecordLayoutFromOrigin().

MaybeCompleteReturnType()

static void MaybeCompleteReturnType ( ClangASTImporter &  importer, CXXMethodDecl *  to_method  )

static

Takes a CXXMethodDecl and completes the return type if necessary.

This is currently only necessary for virtual functions with covariant return types where Clang's CodeGen expects that the underlying records are already completed.

Definition at line 1246 of file ClangASTImporter.cpp.

References lldb_private::ClangASTImporter::CompleteTagDecl().

Referenced by lldb_private::ClangASTImporter::ASTImporterDelegate::Imported().

RemapModule()

static OptionalClangModuleID RemapModule ( OptionalClangModuleID  from_id, ClangExternalASTSourceCallbacks &  from_source, ClangExternalASTSourceCallbacks &  to_source  )

static

Recreate a module with its parents in to_source and return its id.

Definition at line 1265 of file ClangASTImporter.cpp.

References lldb_private::ClangExternalASTSourceCallbacks::GetIDForModule(), lldb_private::ClangExternalASTSourceCallbacks::getModule(), lldb_private::TypeSystemClang::GetOrCreateClangModule(), lldb_private::ClangExternalASTSourceCallbacks::GetTypeSystem(), lldb_private::OptionalClangModuleID::GetValue(), lldb_private::OptionalClangModuleID::HasValue(), and RemapModule().

Referenced by lldb_private::ClangASTImporter::ASTImporterDelegate::Imported(), and RemapModule().