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//===-- NameSearchContext.cpp ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "NameSearchContext.h"
#include "ClangUtil.h"
using namespace clang;
using namespace lldb_private;
clang::NamedDecl *NameSearchContext::AddVarDecl(const CompilerType &type) {
assert(type && "Type for variable must be valid!");
if (!type.IsValid())
return nullptr;
TypeSystemClang *lldb_ast =
llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (!lldb_ast)
return nullptr;
IdentifierInfo *ii = m_decl_name.getAsIdentifierInfo();
clang::ASTContext &ast = lldb_ast->getASTContext();
clang::NamedDecl *Decl = VarDecl::Create(
ast, const_cast<DeclContext *>(m_decl_context), SourceLocation(),
SourceLocation(), ii, ClangUtil::GetQualType(type), nullptr, SC_Static);
m_decls.push_back(Decl);
return Decl;
}
clang::NamedDecl *NameSearchContext::AddFunDecl(const CompilerType &type,
bool extern_c) {
assert(type && "Type for variable must be valid!");
if (!type.IsValid())
return nullptr;
if (m_function_types.count(type))
return nullptr;
TypeSystemClang *lldb_ast =
llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (!lldb_ast)
return nullptr;
m_function_types.insert(type);
QualType qual_type(ClangUtil::GetQualType(type));
clang::ASTContext &ast = lldb_ast->getASTContext();
const bool isInlineSpecified = false;
const bool hasWrittenPrototype = true;
const bool isConstexprSpecified = false;
clang::DeclContext *context = const_cast<DeclContext *>(m_decl_context);
if (extern_c) {
context = LinkageSpecDecl::Create(
ast, context, SourceLocation(), SourceLocation(),
clang::LinkageSpecDecl::LanguageIDs::lang_c, false);
}
// Pass the identifier info for functions the decl_name is needed for
// operators
clang::DeclarationName decl_name =
m_decl_name.getNameKind() == DeclarationName::Identifier
? m_decl_name.getAsIdentifierInfo()
: m_decl_name;
clang::FunctionDecl *func_decl = FunctionDecl::Create(
ast, context, SourceLocation(), SourceLocation(), decl_name, qual_type,
nullptr, SC_Extern, isInlineSpecified, hasWrittenPrototype,
isConstexprSpecified ? CSK_constexpr : CSK_unspecified);
// We have to do more than just synthesize the FunctionDecl. We have to
// synthesize ParmVarDecls for all of the FunctionDecl's arguments. To do
// this, we raid the function's FunctionProtoType for types.
const FunctionProtoType *func_proto_type =
qual_type.getTypePtr()->getAs<FunctionProtoType>();
if (func_proto_type) {
unsigned NumArgs = func_proto_type->getNumParams();
unsigned ArgIndex;
SmallVector<ParmVarDecl *, 5> parm_var_decls;
for (ArgIndex = 0; ArgIndex < NumArgs; ++ArgIndex) {
QualType arg_qual_type(func_proto_type->getParamType(ArgIndex));
parm_var_decls.push_back(
ParmVarDecl::Create(ast, const_cast<DeclContext *>(context),
SourceLocation(), SourceLocation(), nullptr,
arg_qual_type, nullptr, SC_Static, nullptr));
}
func_decl->setParams(ArrayRef<ParmVarDecl *>(parm_var_decls));
} else {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
LLDB_LOG(log, "Function type wasn't a FunctionProtoType");
}
// If this is an operator (e.g. operator new or operator==), only insert the
// declaration we inferred from the symbol if we can provide the correct
// number of arguments. We shouldn't really inject random decl(s) for
// functions that are analyzed semantically in a special way, otherwise we
// will crash in clang.
clang::OverloadedOperatorKind op_kind = clang::NUM_OVERLOADED_OPERATORS;
if (func_proto_type &&
TypeSystemClang::IsOperator(decl_name.getAsString().c_str(), op_kind)) {
if (!TypeSystemClang::CheckOverloadedOperatorKindParameterCount(
false, op_kind, func_proto_type->getNumParams()))
return nullptr;
}
m_decls.push_back(func_decl);
return func_decl;
}
clang::NamedDecl *NameSearchContext::AddGenericFunDecl() {
FunctionProtoType::ExtProtoInfo proto_info;
proto_info.Variadic = true;
QualType generic_function_type(
GetASTContext().getFunctionType(GetASTContext().UnknownAnyTy, // result
ArrayRef<QualType>(), // argument types
proto_info));
return AddFunDecl(m_clang_ts.GetType(generic_function_type), true);
}
clang::NamedDecl *
NameSearchContext::AddTypeDecl(const CompilerType &clang_type) {
if (ClangUtil::IsClangType(clang_type)) {
QualType qual_type = ClangUtil::GetQualType(clang_type);
if (const TypedefType *typedef_type =
llvm::dyn_cast<TypedefType>(qual_type)) {
TypedefNameDecl *typedef_name_decl = typedef_type->getDecl();
m_decls.push_back(typedef_name_decl);
return (NamedDecl *)typedef_name_decl;
} else if (const TagType *tag_type = qual_type->getAs<TagType>()) {
TagDecl *tag_decl = tag_type->getDecl();
m_decls.push_back(tag_decl);
return tag_decl;
} else if (const ObjCObjectType *objc_object_type =
qual_type->getAs<ObjCObjectType>()) {
ObjCInterfaceDecl *interface_decl = objc_object_type->getInterface();
m_decls.push_back((NamedDecl *)interface_decl);
return (NamedDecl *)interface_decl;
}
}
return nullptr;
}
void NameSearchContext::AddLookupResult(clang::DeclContextLookupResult result) {
for (clang::NamedDecl *decl : result)
m_decls.push_back(decl);
}
void NameSearchContext::AddNamedDecl(clang::NamedDecl *decl) {
m_decls.push_back(decl);
}
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