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218 lines
11 KiB
218 lines
11 KiB
(*
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* Copyright (c) 2013 - present Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*)
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(** Translate declarations **)
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module L = Logging
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open CFrontend_utils
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module type CFrontend_decl = sig
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val function_decl : Sil.tenv -> Cfg.cfg -> Cg.t -> Clang_ast_t.decl ->
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CModule_type.block_data option -> unit
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val translate_one_declaration : Sil.tenv -> Cg.t -> Cfg.cfg -> Clang_ast_t.decl -> Clang_ast_t.decl -> unit
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end
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module CFrontend_decl_funct(T: CModule_type.CTranslation) : CFrontend_decl =
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struct
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let model_exists procname =
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Specs.summary_exists_in_models procname && not !CFrontend_config.models_mode
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(* Translates the method/function's body into nodes of the cfg. *)
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let add_method tenv cg cfg class_decl_opt procname body has_return_param is_objc_method
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outer_context_opt extra_instrs =
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Printing.log_out
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"\n\n>>---------- ADDING METHOD: '%s' ---------<<\n@." (Procname.to_string procname);
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try
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(match Cfg.Procdesc.find_from_name cfg procname with
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| Some procdesc ->
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if (Cfg.Procdesc.is_defined procdesc && not (model_exists procname)) then
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(let context =
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CContext.create_context tenv cg cfg procdesc class_decl_opt
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has_return_param is_objc_method outer_context_opt in
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let start_node = Cfg.Procdesc.get_start_node procdesc in
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let exit_node = Cfg.Procdesc.get_exit_node procdesc in
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Printing.log_out
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"\n\n>>---------- Start translating body of function: '%s' ---------<<\n@."
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(Procname.to_string procname);
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let meth_body_nodes = T.instructions_trans context body extra_instrs exit_node in
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Cfg.Node.add_locals_ret_declaration start_node (Cfg.Procdesc.get_locals procdesc);
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Cfg.Node.set_succs_exn start_node meth_body_nodes [];
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Cg.add_defined_node (CContext.get_cg context) (Cfg.Procdesc.get_proc_name procdesc))
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| None -> ())
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with
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| Not_found -> ()
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| CTrans_utils.Self.SelfClassException _ ->
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assert false (* this shouldn't happen, because self or [a class] should always be arguments of functions. This is to make sure I'm not wrong. *)
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| Assert_failure (file, line, column) ->
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print_endline ("Fatal error: exception Assert_failure("^
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file^", "^(string_of_int line)^", "^(string_of_int column)^")");
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Cfg.Procdesc.remove cfg procname true;
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CMethod_trans.create_external_procdesc cfg procname is_objc_method None;
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()
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let function_decl tenv cfg cg func_decl block_data_opt =
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Printing.log_out "\nResetting the goto_labels hashmap...\n";
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CTrans_utils.GotoLabel.reset_all_labels (); (* C Language Std 6.8.6.1-1 *)
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let captured_vars, outer_context_opt =
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match block_data_opt with
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| Some (outer_context, _, _, captured_vars) -> captured_vars, Some outer_context
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| None -> [], None in
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let ms, body_opt, extra_instrs =
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CMethod_trans.method_signature_of_decl tenv func_decl block_data_opt in
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match body_opt with
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| Some body -> (* Only in the case the function declaration has a defined body we create a procdesc *)
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let procname = CMethod_signature.ms_get_name ms in
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let return_param_typ_opt = CMethod_signature.ms_get_return_param_typ ms in
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if CMethod_trans.create_local_procdesc cfg tenv ms [body] captured_vars false then
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add_method tenv cg cfg CContext.ContextNoCls procname body return_param_typ_opt false
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outer_context_opt extra_instrs
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| None -> ()
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let process_method_decl tenv cg cfg curr_class meth_decl ~is_objc =
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let ms, body_opt, extra_instrs =
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CMethod_trans.method_signature_of_decl tenv meth_decl None in
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match body_opt with
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| Some body ->
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let is_instance = CMethod_signature.ms_is_instance ms in
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let procname = CMethod_signature.ms_get_name ms in
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let is_objc_inst_method = is_instance && is_objc in
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let return_param_typ_opt = CMethod_signature.ms_get_return_param_typ ms in
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if CMethod_trans.create_local_procdesc cfg tenv ms [body] [] is_objc_inst_method then
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add_method tenv cg cfg curr_class procname body return_param_typ_opt is_objc
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None extra_instrs
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| None -> ()
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let process_one_method_decl tenv cg cfg curr_class dec =
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let open Clang_ast_t in
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match dec with
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| CXXMethodDecl _ | CXXConstructorDecl _ | CXXConversionDecl _ | CXXDestructorDecl _ ->
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process_method_decl tenv cg cfg curr_class dec ~is_objc:false
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| ObjCMethodDecl _ ->
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process_method_decl tenv cg cfg curr_class dec ~is_objc:true
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| ObjCPropertyImplDecl _ | EmptyDecl _
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| ObjCIvarDecl _ | ObjCPropertyDecl _ -> ()
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| _ ->
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Printing.log_stats
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"\nWARNING: found Method Declaration '%s' skipped. NEED TO BE FIXED\n\n" (Ast_utils.string_of_decl dec);
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()
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let process_methods tenv cg cfg curr_class decl_list =
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IList.iter (process_one_method_decl tenv cg cfg curr_class) decl_list
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let should_translate_decl dec =
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let info = Clang_ast_proj.get_decl_tuple dec in
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CLocation.update_curr_file info;
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let source_range = info.Clang_ast_t.di_source_range in
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let translate_location = CLocation.should_translate_lib source_range in
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let always_translate_decl = match dec with
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| Clang_ast_t.FunctionDecl (_, name_info, _, _) ->
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(* named_decl_info.ni_name has name without template parameters.*)
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(* It makes it possible to capture whole family of function instantiations*)
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(* to be named the same *)
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let fun_name = name_info.Clang_ast_t.ni_name in
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let top_qual = IList.hd (IList.rev name_info.Clang_ast_t.ni_qual_name) in
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(* Always translate std::move so that it can be analyzed *)
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top_qual="std" && fun_name = "move"
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| _ -> false in
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translate_location || always_translate_decl
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(* Translate one global declaration *)
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let rec translate_one_declaration tenv cg cfg parent_dec dec =
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let open Clang_ast_t in
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(* Run the frontend checkers on this declaration *)
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CFrontend_errors.run_frontend_checkers_on_decl tenv cg cfg dec;
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(* each procedure has different scope: start names from id 0 *)
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Ident.NameGenerator.reset ();
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(if should_translate_decl dec then
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match dec with
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| FunctionDecl(_, _, _, _) ->
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function_decl tenv cfg cg dec None
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| ObjCInterfaceDecl(_, name_info, decl_list, _, oi_decl_info) ->
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let name = Ast_utils.get_qualified_name name_info in
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let curr_class = ObjcInterface_decl.get_curr_class name oi_decl_info in
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ignore
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(ObjcInterface_decl.interface_declaration CTypes_decl.type_ptr_to_sil_type tenv dec);
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process_methods tenv cg cfg curr_class decl_list
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| ObjCProtocolDecl(_, name_info, decl_list, _, _) ->
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let name = Ast_utils.get_qualified_name name_info in
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let curr_class = CContext.ContextProtocol name in
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ignore (ObjcProtocol_decl.protocol_decl CTypes_decl.type_ptr_to_sil_type tenv dec);
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process_methods tenv cg cfg curr_class decl_list
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| ObjCCategoryDecl(_, name_info, decl_list, _, ocdi) ->
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let name = Ast_utils.get_qualified_name name_info in
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let curr_class = ObjcCategory_decl.get_curr_class_from_category_decl name ocdi in
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ignore (ObjcCategory_decl.category_decl CTypes_decl.type_ptr_to_sil_type tenv dec);
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process_methods tenv cg cfg curr_class decl_list
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| ObjCCategoryImplDecl(_, name_info, decl_list, _, ocidi) ->
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let name = Ast_utils.get_qualified_name name_info in
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let curr_class = ObjcCategory_decl.get_curr_class_from_category_impl name ocidi in
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ignore (ObjcCategory_decl.category_impl_decl CTypes_decl.type_ptr_to_sil_type tenv dec);
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process_methods tenv cg cfg curr_class decl_list;
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| ObjCImplementationDecl(_, _, decl_list, _, idi) ->
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let curr_class = ObjcInterface_decl.get_curr_class_impl idi in
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let type_ptr_to_sil_type = CTypes_decl.type_ptr_to_sil_type in
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ignore (ObjcInterface_decl.interface_impl_declaration type_ptr_to_sil_type tenv dec);
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process_methods tenv cg cfg curr_class decl_list;
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| CXXMethodDecl (decl_info, _, _, _, _)
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| CXXConstructorDecl (decl_info, _, _, _, _)
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| CXXConversionDecl (decl_info, _, _, _, _)
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| CXXDestructorDecl (decl_info, _, _, _, _) ->
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(* di_parent_pointer has pointer to lexical context such as class.*)
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(* If it's not defined, then it's the same as parent in AST *)
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let class_decl = match decl_info.Clang_ast_t.di_parent_pointer with
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| Some ptr -> Ast_utils.get_decl ptr
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| None -> Some parent_dec in
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(match class_decl with
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| Some (CXXRecordDecl _ as d)
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| Some (ClassTemplateSpecializationDecl _ as d) ->
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let class_name = CTypes_decl.get_record_name d in
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let curr_class = CContext.ContextCls(class_name, None, []) in
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if !CFrontend_config.cxx_experimental then
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process_methods tenv cg cfg curr_class [dec]
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| Some dec -> Printing.log_stats "Methods of %s skipped\n" (Ast_utils.string_of_decl dec)
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| None -> ())
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| _ -> ());
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match dec with
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(* Currently C/C++ record decl treated in the same way *)
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| ClassTemplateSpecializationDecl (decl_info, _, _, _, decl_list, _, _, _)
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| CXXRecordDecl (decl_info, _, _, _, decl_list, _, _, _)
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| RecordDecl (decl_info, _, _, _, decl_list, _, _) when not decl_info.di_is_implicit ->
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let is_method_decl decl = match decl with
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| CXXMethodDecl _ | CXXConstructorDecl _ | CXXConversionDecl _
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| CXXDestructorDecl _ | FunctionTemplateDecl _ ->
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true
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| _ -> false in
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let method_decls, no_method_decls = IList.partition is_method_decl decl_list in
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IList.iter (translate_one_declaration tenv cg cfg dec) no_method_decls;
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ignore (CTypes_decl.add_types_from_decl_to_tenv tenv dec);
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IList.iter (translate_one_declaration tenv cg cfg dec) method_decls
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| EnumDecl _ -> ignore (CEnum_decl.enum_decl dec)
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| LinkageSpecDecl (_, decl_list, _) ->
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Printing.log_out "ADDING: LinkageSpecDecl decl list\n";
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IList.iter (translate_one_declaration tenv cg cfg dec) decl_list
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| NamespaceDecl (_, _, decl_list, _, _) ->
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IList.iter (translate_one_declaration tenv cg cfg dec) decl_list
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| ClassTemplateDecl (_, _, template_decl_info)
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| FunctionTemplateDecl (_, _, template_decl_info) ->
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let decl_list = template_decl_info.Clang_ast_t.tdi_specializations in
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IList.iter (translate_one_declaration tenv cg cfg dec) decl_list
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| _ -> ()
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end
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