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author | Hristian Kirtchev <kirtchev@adacore.com> | 2011-08-03 14:36:26 +0000 |
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committer | Arnaud Charlet <charlet@gcc.gnu.org> | 2011-08-03 16:36:26 +0200 |
commit | df3e68b121249fad724c7c3f2b71e430dfb91008 (patch) | |
tree | 3a155e8b2ced397467e576bd84bd23e0fd58fd91 /gcc/ada/exp_ch13.adb | |
parent | de29d8500c2f9f5f164032ae5c3a5477dcc45c51 (diff) | |
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a-except.adb, [...] (Raise_From_Controlled_Operation): Rewritten to create the message strings when...
2011-08-03 Hristian Kirtchev <kirtchev@adacore.com>
* a-except.adb, a-except-2005.adb (Raise_From_Controlled_Operation):
Rewritten to create the message strings when the exception is not
raised by an abort during finalization.
* a-except.ads, a-except-2005.ads: Add pragma Export for procedure
Raise_From_Controlled_Operation and update its associated comment.
* a-fihema.ads, a-fihema.adb: New GNAT unit.
Ada.Finalization.Heap_Management provides key functionality
associated with controlled objects on the heap, their creation,
finalization and reclamation. Type Finalization_Collection is
effectively a wrapper which sits ontop of a storage pool and performs
all necessary bookkeeping for all the objects it contains. Each
access-to-controlled or access-to-class-wide type receives a collection
as part of its expansion. The compiler generates buffer code and
invokes Allocate / Deallocate to create and destroy allocated
controlled objects.
* a-finali.adb ("="): Removed.
* a-finali.ads ("="): Removed. Controlled types no longer carry hidden
fields Prev and Next.
* ali.adb (Scan_ALI): Add parsing code to process PF / Has_Finalizer.
A library unit with at least one controlled object on the library level
has a special finalizer which is invoked by the binder. To signal this,
ali files carry field PF.
* ali.ads: New field in type Unit_Record called Has_Finalizer. Add
associated comment on field usage.
* a-tags.adb (Get_RC_Offset): Removed.
(Needs_Finalization): New routine.
* a-tags.ads: Update the structure of the GNAT dispatch tables.
Dispatch tables now carry field Needs_Finalization which provides
runtime indication whether a type is controlled or has controlled
components or both. Remove field RC_Offset.
(Get_RC_Offset): Removed along with its associated pragma Export.
Since tagged types with controlled components no longer carry hidden
field _controller, the special mechanism to retrieve its location is no
longer needed.
(Needs_Finalization): New routine.
* atree.ads, atree.adb (Elist24): New routine.
(Set_Elist24): New routine.
* atree.h: Add a define clause for Elist24.
* bindgen.adb New library-level variable Lib_Final_Built.
(Gen_Adafinal_Ada): Reimplemented. Depending on the restrictions or the
presence of a VM target, the routine generates calls to the proper
library finalization routine.
(Gen_Adainit_Ada): Import Finalize_Library_Objects only on non-VM
targets. Set the correct library finalization routine depending on
whether the library has controlled objects or this is a VM compilation.
(Gen_Finalize_Library_Ada): New routine. This procedure generates calls
to library-level finalizers of compiled units in reverse order of
elaboration. It also produces exception management code and reraises a
potential exception after all units have been finalized.
(Gen_Finalize_Library_C): New routine. This procedure generates calls to
library-level finalizers of compiled units in reverse order of
elaboration.
(Gen_Finalize_Library_Defs_C): New routine. This procedure generates the
definitions of all library-level finalizers available to the compilation
(Gen_Main_Ada): Directly call Adafinal which now contails all target
dependent code.
(Gen_Main_C): Add new local constant Needs_Library_Finalization. Call
System.Standard_Library.Adafinal directly. If the library needs
finalization actions, create the sequence of finalization calls.
(Gen_Output_File_Ada): Alphabetize local variables and constants.
Generate a with clause for System.Soft_Links when compiling for a VM.
Remove the code which imports System.Standard_Library.Adafinal as
Do_Finalize. Generate the library finalization routine.
(Gen_Output_File_C): Add new local constant Needs_Library_Finalization.
If the library needs finalization actions, create all the definitions
of library- level finalizers.
(Has_Finalizer): New routine. Determines whether at least one compiled
unit has a library-level finalizer.
Add type Qualification_Mode.
(Set_Unit_Name): Add a formal which controls the replacement of a dot.
* einfo.adb: New usage of field 15 as Return_Flag.
Remove Finalization_Chain_Entity from the usages of field 19.
Remove Associated_Final_Chain from the usages of field 23.
New usage of field 23 as Associated_Collection.
New usage of field 24 as Finalizer.
New usage of flag 252 as Is_Processed_Transient.
(Associated_Final_Chain): Removed.
(Associated_Collection): New routine.
(Finalization_Chain_Entity): Removed.
(Finalizer): New routine.
(Is_Finalizer): New routine.
(Is_Processed_Transient): New routine.
(Return_Flag): New routine.
(Set_Associated_Final_Chain): Removed.
(Set_Associated_Collection): New routine.
(Set_Finalization_Chain_Entity): Removed.
(Set_Finalizer): New routine.
(Set_Is_Processed_Transient): New routine.
(Set_Return_Flag): New routine.
(Write_Entity_Flags): Include Is_Processed_Transient to the list of
displayed flags.
(Write_Field8_Name): Alphabetize the output.
(Write_Field11_Name): Alphabetize the output.
(Write_Field12_Name): Alphabetize the output.
(Write_Field13_Name): Alphabetize the output.
(Write_Field14_Name): Alphabetize the output.
(Write_Field15_Name): Alphabetize the output.
(Write_Field16_Name): Alphabetize the output.
(Write_Field17_Name): Alphabetize the output.
(Write_Field18_Name): Alphabetize the output.
(Write_Field19_Name): Alphabetize the output. Remove the output of
Finalization_Chain_Entity.
(Write_Field20_Name): Alphabetize the output.
(Write_Field21_Name): Alphabetize the output.
(Write_Field22_Name): Alphabetize the output.
(Write_Field23_Name): Alphabetize the output. Remove the output of
Associated_Final_Chain. Add output for Associated_Collection.
(Write_Field24_Name): Alphabetize the output.
(Write_Field25_Name): Add output for Finalizer.
(Write_Field26_Name): Alphabetize the output.
(Write_Field27_Name): Alphabetize the output.
(Write_Field28_Name): Alphabetize the output.
* einfo.ads: Add new field description for Associated_Collection and
its uses in nodes.
Remove Associated_Final_Chain and its uses in nodes.
Remove Finalization_Chain_Entity and its uses in nodes.
Add new field description for Finalizer and its uses in nodes.
Add new synthesized attribute Is_Finalizer.
Add new flag description for Is_Processed_Transient and its uses in
nodes.
Add new field description for Return_Flag and its uses in nodes.
(Associated_Final_Chain): Removed along with its pragma Inline.
(Associated_Collection): New routine and pragma Inline.
(Finalization_Chain_Entity): Removed along with its pragma Inline.
(Finalizer): New routine and pragma Inline.
(Is_Finalizer): New routine and pragma Inline.
(Is_Processed_Transient): New routine and pragma Inline.
(Return_Flag): New routine and pragma Inline.
(Set_Associated_Final_Chain): Removed along with its pragma Inline.
(Set_Associated_Collection): New routine and pragma Inline.
(Set_Finalization_Chain_Entity): Removed along with its pragma Inline.
(Set_Finalizer): New routine and pragma Inline.
(Set_Is_Processed_Transient): New routine and pragma Inline.
(Set_Return_Flag): New routine and pragma Inline.
* exp_aggr.adb: Alphabetize subprograms.
(Build_Array_Aggr_Code): Remove formal Flist and its associated comment.
(Build_Record_Aggr_Code): Remove formals Flist and Obj along with their
associated comments. Remove local variables External_Final_List and
Attach.
Rename Ctrl_Stuff_Done to Finalization_Done. Rename local variable A to
Ancestor. Remove the retrieval of finalization lists. Update the call to
Make_Adjust_Call.
(Convert_Aggr_In_Allocator): Remove the retrieval of finalization
lists. Update the call to Late_Expansion.
(Convert_Aggr_In_Assignment): Update the call to Late_Expansion.
(Convert_Aggr_In_Object_Decl): Update the call to Late_Expansion.
(Gen_Assign): Remove the retrieval of the finalization list used to
build the assignment. Update the calls to Make_Init_Call and
Make_Adjust_Call.
(Gen_Ctrl_Actions_For_Aggr): Renamed to Generate_Finalization_Actions.
Remove the mechanism to determine attachment levels and finalization
list retrieval. Remove the processing for coextensions.
(Init_Controller): Removed. Controllers no longer exist.
(Late_Expansion): Remove formals Flist and Obj along with their
associated comments. Update the calls to Build_Record_Aggr_Code and
Build_Array_Aggr_Code.
* exp_ch13.adb (Expand_N_Free_Statement): New routine.
(Expand_N_Freeze_Entity): Add special processing for finalizers which
appear in entry bodies, protected subprograms and task bodies.
* exp_ch13.ads (Expand_N_Free_Statement): New routine.
* exp_ch3.adb (Add_Final_Chain): Removed.
(Build_Array_Init_Proc): Alphabetize local variables.
(Build_Assignment): Alphabetize local variables. Update the call to
Maked_Adjust_Call.
(Build_Class_Wide_Master): Rename local variables to better reflect
their role.
(Build_Discriminant_Assignments): Code reformatting.
(Build_Init_Call_Thru): Code reformatting.
(Build_Init_Procedure): Code reformatting. Generate a special version
of Deep_Finalize which is capable of finalizing all initialized
components and ignore the rest.
(Build_Init_Statements): Rename local variables to better reflect their
role.
Reimplement the mechanism to include the creation and update of an index
variable called a "counter". It is used as a bookmark for tracing
initialized and non-initialized components.
(Build_Initialization_Call): Remove local variable Controller_Typ.
Alphabetize all local variables. Remove the initialization of the
record controller and update the call to Make_Init_Call.
(Build_Record_Init_Proc): Rename formal Pe to Rec_Ent.
New local variable Counter.
(Constrain_Array): Alphabetize.
(Expand_Freeze_Array_Type): Create a collection instead of a
finalization list.
(Expand_Freeze_Class_Wide_Type): New routine. Creates TSS primitive
Finalize_Address which is used in conjunction with allocated controlled
objects.
(Expand_N_Object_Declaration): Remove the creation of a finalization
list for anonymous access types. Update the calls to Make_Init_Call and
Make_Adjust_Call.
(Expand_Freeze_Record_Type): Remove local variable Flist. Remove the
retrieval of finalization lists. Remove the expansion of the record
controller. Create TSS primitive Finalize_Address used in conjunction
with controlled objects on the heap. Create finalization collections
for access-to-controlled record components.
(Expand_Record_Controller): Removed.
(Freeze_Type): Remove the freezing of record controllers. Freezing of
class-wide types now requires additional processing. Create
finalization collections for access-to-controlled types.
(Increment_Counter): New routine.
(Make_Counter): New routine.
(Make_Eq_If): Remove the mention of Name_uController.
(Make_Predefined_Primitive_Specs): There is no longer need to skip
types coming from System.Finalization_Root.
(Predef_Deep_Spec): Reimplemented to reflect the new parameter profiles.
(Predefined_Primitive_Bodies): There is no longer need to skip types
coming from System.Finalization_Root.
(Stream_Operation_OK): Do not generate stream routines for
type Ada.Finalization.Heap_Management.Finalization_Collection.
* exp_ch3.ads: Alphabetize subprograms.
* exp_ch4.adb: Remove with and use clause for Sem_Ch8.
Add with and use clause for Lib.
(Complete_Coextension_Finalization): Removed.
(Complete_Controlled_Allocation): New routine. Create a finalization
collection for anonymous access-to-controlled types. Create a custom
Allocate which interfaces with the back end and the machinery in
Heap_Management.
(Expand_Allocator_Expression): Add necessary calls to
Complete_Controlled_Allocation. Remove the retrieval of finalization
lists. Update the calls to Make_Adjust_Call. Generate a call to
Ada.Finalization.Heap_Management.Set_Finalize_Address_Ptr to decorate
the associated collection.
(Expand_N_Allocator): Remove the processing for dynamic coextensions.
Code clean up. Remove the retrieval of finalization lists and
attachment levels.
Update the call to Make_Init_Call. Generate a call to
Ada.Finalization.Heap_Management.Set_Finalize_Address_Ptr to decorate
the associated collection.
(Get_Allocator_Final_List): Removed. Finalization lists are not
available.
(Suitable_Element): Remove the mention of Name_uController.
* exp_ch5.adb: Remove with and use clauses for Ttypes and Uintp.
(Make_Tag_Ctrl_Assignment): Rewritten to simply do a finalization of
the left hand side, carry out the assignment and adjust the left hand
side.
* exp_ch6.adb (Add_Final_List_Actual_To_Build_In_Place_Call): Removed.
(Add_Collection_Actual_To_Build_In_Place_Call): New routine.
(BIP_Formal_Suffix): Rename BIP_Final_List and BIPfinallist to
BIP_Collection and BIPcollection.
(Build_Heap_Allocator): New routine used to allocate the return object
of a build-in-place function onto a collection.
(Expand_Ctrl_Function_Call): Moved from Exp_Ch7.
(Expand_Call): Do not replace direct calls to Deep routines with their
aliases.
(Expand_N_Extended_Return_Statement): Give all variables shorter names
and update their occurrences. Add a special return flag to monitor the
[ab]normal execution of the function. The flag is set right before the
return statement.
Rewrite the mechanism used to allocate a build-in-place return object
on the heap or on a storage pool.
(Is_Direct_Deep_Call): New routine.
(Make_Build_In_Place_Call_In_Allocator): Add a collection to a
build-in-place function call instead of a final list. Build a call to
Set_Finalize_Address_Ptr to decorate the associated collection.
(Make_Build_In_Place_Call_In_Anonymous_Context): Create a temporary in
order to name the build-in-place function call's result for later
finalization. Add a collection to a build-in-place function call
instead of a final list.
(Make_Build_In_Place_Call_In_Assignment): Add a collection to a
build-in-place function call instead of a final list. Remove the code
which moves one final list and transforms it into the actual in a
nested build-in-place call.
(Make_Build_In_Place_Call_In_Object_Declaration): Add a collection to a
build-in-place function call instead of a final list.
(Move_Final_List): Removed.
(Needs_BIP_Collection): New routine.
(Needs_BIP_Final_List): Removed.
* exp_ch6.ads: Replace BIP_Final_List with BIP_Collection in
enumeration type BIP_Formal_Kind.
Update the related comment.
(Needs_BIP_Collection): New routine.
(Needs_BIP_Final_List): Removed.
* exp_ch7.adb: Add with and use clauses for Elists, Exp_Ch6, Stringt
and Ttypes. Remove with and use clauses for Sem_Type. Alphabetize the
majority of subprograms in this unit. Add Name_Finalize_Address to
array Name_Of and TSS_Finalize_Address to array Deep_Name_Of.
(Build_Adjust_Or_Finalize_Statements): Create the adjust or finalization
statements for an array type.
(Build_Adjust_Statements): Create the adjust statements for a record
type.
(Build_Cleanup_Statements): New routine. A procedure which given any
construct containing asynchronous calls, references to _master, or is a
task body, a task allocation or a protected body produces the necessary
runtime calls to clean up these constructs.
(Build_Exception_Handler): New routine.
(Build_Final_List): Removed.
(Build_Finalization_Collection): New routine. A core procedure which
creates a collection to service heap allocated controlled objects
associated with an access-to-controlled type.
(Build_Finalize_Statements): Create the finalization statements for a
record types.
(Build_Finalizer): New routine. A core procedure which given any
construct with declarations and/or statements detects all objects which
need any type of clean up (controlled objects, protected objects) and
generates all necessary code to clean up the said objects in the proper
order.
(Build_Finalizer_Call): New routine.
(Build_Initialize_Statements): Create the initialization statements for
an array type. The generated routine contains code to finalize partially
initialized arrays.
(Build_Object_Declarations): New routine.
(Build_Raise_Statement): New routine.
(Clean_Simple_Protected_Objects): Removed.
(Controller_Component): Removed.
(Enclosing_Function): New routine.
(Expand_Cleanup_Actions): Create a finalizer for a construct which has
either declarations or statements or both.
(Expand_N_Package_Body): Create a finalizer for a non-generic package.
(Expand_N_Package_Declaration): Create a finalizer for a non-generic
package.
(Find_Final_List): Removed.
(Global_Flist_Ref): Removed.
(In_Finalization_Root): Removed.
(Insert_Actions_In_Scope_Around): Determine the range of the transient
scope in terms of tree nodes. Process all transient variables within
that range.
(Make_Adjust_Call): Rewritten. There is no longer an attach call
generated after the adjust.
(Make_Attach_Call): Removed.
(Make_Call): New routine.
(Make_Clean): Removed.
(Make_Deep_Array_Body): Rewritten to simply invoke the appropriate
build routines.
(Make_Deep_Proc): Rewritten to generate the new profile signature used
in Deep routines.
(Make_Deep_Record_Body): Rewritten to simply invoke the appropriate
build routines.
(Make_Final_Call): Modified to simply create a call to either
Deep_Finalize or Finalize.
(Make_Finalize_Address_Body): New routine.
(Make_Finalize_Address_Stmts): New routine. A function which produces
TSS primitive Finalize_Address used in conjunction with heap allocated
controlled objects.
(Make_Handler_For_Ctrl_Operation): Add specialized code for .NET/JVM.
(Make_Init_Call): Rewritten. There is no longer an attach call
generated after initialization.
(Make_Local_Deep_Finalize): New routine.
(Make_Set_Finalize_Address_Ptr_Call): New routine.
(Make_Transient_Block): Remove the finalization list retrieval and
manipulation.
(Needs_Finalization): Moved to Exp_Util.
(Parent_Field_Type): New routine.
(Preprocess_Components): New routine.
(Process_Transient_Objects): New routine.
(Wrap_HSS_In_Block): New routine.
(Wrap_Transient_Declaration): Remove finalization list management and
controller insertion.
(Wrap_Transient_Expression): Code reformatting.
(Wrap_Transient_Statement): Code reformatting.
* exp_ch7.ads (Build_Final_List): Removed.
(Build_Finalization_Collection): New routine.
(Build_Raise_Statement): New routine.
(Controller_Component): Removed.
(Expand_Ctrl_Function_Call): Moved to Exp_Ch6.
(Find_Final_List): Removed.
(In_Finalization_Root): Removed.
(Is_Simple_Protected_Type): Update related comment.
(Make_Adjust_Call): New parameter profile and associated comments.
(Make_Attach_Call): Removed.
(Make_Final_Call): New parameter profile and associated comments.
(Make_Finalize_Address_Body): New routine.
(Make_Init_Call): New parameter profile and associated comments.
(Make_Local_Deep_Finalize): New routine.
(Make_Set_Finalize_Address_Ptr_Call): New routine.
(Needs_Finalization): Moved to Exp_Util.
* exp_ch9.adb (Add_Object_Pointer): Code reformatting.
(Expand_N_Protected_Body): Remove the handling of finalization lists.
(Find_Protection_Type): Moved to Exp_Util.
* exp_disp.adb: Remove with and use clauses for Exp_Ch7.
(Make_DT): Update sequence of dispatch table initialization. Remove the
initialization of field RC_Offset. Add initialization of field Needs_
Finalization.
* exp_intr.adb (Expand_Unc_Deallocation): Code reformatting.
Reimplement how an object is first finalized, then deallocated.
* exp_strm.adb (Build_Record_Or_Elementary_Input_Function):
Code reformatting.
* exp_tss.ads: Add special suffix for TSS primitive Finalize_Address.
Register TSS_Finalize_Address with type TSS_Names.
* exp_util.adb (Build_Allocate_Deallocate_Proc): New routine. This core
procedure provides the interface between an allocation / deallocation
and the support machinery in Ada.Finalization.Heap_Management.
(Find_Init_Call): Code reformatting.
(Find_Init_Call_In_List): Code reformatting.
(Find_Protection_Type): Moved from Exp_Ch9.
(Find_Prim_Op): Reimplement to add preference of recovered primitive.
(Has_Controlled_Coextensions): Removed.
(Has_Controlled_Objects): New routine.
(In_Library_Level_Package_Body): New routine.
(Insert_Action_After): New routine.
(Is_Finalizable_Transient): New routine. This predicate determines
whether an object declaration is one of the many variants of controlled
transients.
(Is_Null_Access_BIP_Func_Call): New routine.
(Is_Non_BIP_Func_Call): New routine.
(Is_Related_To_Func_Return): New routine.
(Needs_Finalization): Moved from Exp_Ch7.
* exp_util.ads (Build_Allocate_Deallocate_Proc): New routine.
(Find_Protection_Type): Moved from Exp_Ch9.
(Has_Controlled_Coextensions): Removed.
(Has_Controlled_Objects): New routine.
(In_Library_Level_Package_Body): New routine.
(Insert_Action_After): New routine.
(Is_Finalizable_Transient): New routine.
(Is_Null_Access_BIP_Func_Call): New routine.
(Is_Non_BIP_Func_Call): New routine.
(Is_Related_To_Func_Return): New routine.
(Needs_Finalization): Moved from Exp_ch7.
* expander.adb (Expand): Add a case for N_Free_Statement.
* freeze.adb (Freeze_All): Replace the generation of a finalization
list with a collection for access-to-controlled types.
(Freeze_Entity): Code reformatting.
(Freeze_Record_Type): Remove the freezing of a record controller
component.
(Freeze_Subprogram): Code reformatting.
* inline.adb (Cleanup_Scopes): Remove the reset of the scope
finalization list.
* lib-writ.adb (Write_Unit_Information): Output "PF" when a package
has a library-level finalizer.
* lib-writ.ads: Add "PF" to the sequence of unit attributes.
* a-filico.ads, a-filico.adb, s-finimp.ads, s-finimp.adb: Removed.
* Makefile.rtl: Remove a-filico and s-finimp from the list of object
files. Add a-fihema to the list of object files.
* par-ch4.adb:
Alphabetize the associations in type Is_Parameterless_Attribute.
* rtsfind.ads: Ada.Finalization_List.Controller and
System.Finalization_Implementation are no longer a GNAT unit.
Update the range of type Ada_Finalization_Child. Remove the following
recoverable entities:
RE_Attach_To_Final_List
RE_Deep_Tag_Attach
RE_Finalize_List
RE_Finalize_One
RE_Finalizable_Ptr_Ptr
RE_Global_Final_List
RE_Limited_Record_Controller
RE_List_Controller
RE_Move_Final_List
RE_Record_Controller
RE_Simple_List_Controller
Add the following recoverable entities:
RE_Add_Offset_To_Address
RE_Allocate
RE_Base_Pool
RE_Deallocate
RE_Exception_Identity
RE_Finalization_Collection
RE_Finalization_Collection_Ptr
RE_Needs_Finalization
RE_Save_Library_Occurrence
RE_Set_Finalize_Address_Ptr
RE_Set_Storage_Pool_Ptr
RE_Storage_Count
* sem_aggr.adb (Resolve_Record_Aggregate): Remove mention of
Name_uController.
* sem_aux.adb (First_Discriminant): Remove mention of Name_uController.
(First_Stored_Discriminant): Remove the mention of Name_uController.
* sem_aux.ads: Comment reformatting.
* sem_ch10.adb (Build_Chain): Signal the class-wide creation machinery
to redecorate an already existing class-wide type.
(Decorate_Tagged_Type): New parameter profile and associated comment.
Create a "shadow class-wide type" for a shadow entity.
* sem_ch11.adb (Analyze_Exception_Handlers): Remove the dubious setting
of the final chain along with the associated comment.
* sem_ch3.adb (Access_Type_Declaration): Add new local variable
Full_Desig and set it to the full view of the designated type.
Initialize the finalization collection to empty.
(Build_Derived_Record_Type): Alphabetize local variables. Code
reformatting.
(Collect_Fixed_Components): Remove the mention of Name_uController.
(Create_Constrained_Components): Remove the mention of Name_uController.
(Make_Class_Wide_Type): Add specialized code to redecorate an existing
class-wide type of a shadow entity.
(Process_Full_View): Update the machinery which marks type
Limited_Controlled's entity as limited.
* sem_ch4.adb (Analyze_One_Call): Code reformatting.
* sem_ch6.adb (Create_Extra_Formals): Do not generate a finalization
list, instead make a collection build-in-place formal.
* sem_ch8.adb (Analyze_Object_Renaming): Look at the available view of
a designated type in order to establish a match between the renaming
and the renamed entity.
(Find_Selected_Component): Add guard to prevent spurious exceptions
from being raised on .NET/JVM.
* sem_disp.adb (Check_Dispatching_Operation): Include Finalize_Address
to the list of primitive that need special processing. Update arrays
C_Names and D_Names.
(Replace_Types): Handle class-wide types.
* sem_elab.adb (Check_A_Call): Since Deep_Initialize now has a
different parameter profile, look at the first formal.
* sem_prag.adb: Remove with and use clauses for Exp_Ch7. Add with and
use clauses for Exp_Util.
* sem_res.adb: Remove with and use clauses for Elists.
(Propagate_Coextensions): Removed.
(Resolve_Allocator): Do not propagate the list of coextensions from one
allocator to another.
* sem_util.adb (Build_Actual_Subtype_Of_Component): Rename variable
Deaccessed_T to Desig_Typ.
(Enter_Name): Remove the mention of Name_uController.
(Gather_Components): Remove the mention of Name_uController.
(Incomplete_Or_Private_View): New routine.
(Is_Coextension_Root): Removed.
(Is_Fully_Initialized_Type): Remove the mention of Name_uController.
* sem_util.ads (Incomplete_Or_Private_View): New routine.
(Is_Coextension_Root): Removed.
* s-finroo.ads: Remove with clause for Ada.Unchecked_Conversion.
Controlled types are now derived from a null tagged record. Remove
types Finalizable_Ptr, Finalizable and Empty_Root_Controlled.
* sinfo.adb (Coextensions): Removed.
(Set_Coextensions): Removed.
* sinfo.ads: Remove Coextensions from the explanation of node fields
and its uses in nodes.
Update the field usage of N_Allocator.
(Coextensions): Removed along with its pragma Inline.
(Set_Coextensions): Removed along with its pragma Inline.
* snames.ads-tmpl: Remove names
Name_uClean
Name_uController
Name_uFinal_List
Name_uLocal_Final_List
Name_Finalization_Root
Name_Next
Name_Prev
Add names
Name_uFinalizer
Name_Finalize_Address
* s-pooglo.adb (Allocate): Add overriding indicator.
(Deallocate): Add overriding indicator.
(Storage_Size): Add overriding indicator.
* s-soflin.adb (Adafinal_NT): Invoke Finalize_Library_Objects rather
than Finalize_Global_List.
(Null_Finalize_Global_List): Removed.
(Save_Library_Occurrence): New routine.
* s-soflin.ads: Remove variable Finalize_Global_List along with its
initialization. Add variable Finalize_Library_Objects along with its
pragma Export. Add variables Library_Exception and
Library_Exception_Set along with their pragma Export.
(Null_Finalize_Global_List): Removed.
(Save_Library_Occurrence): New routine.
* s-tassta.adb (Finalize_Global_Tasks): Call Finalize_Library_Objects
rather than Finalize_Global_List.
* tbuild.adb (Unchecked_Convert_To): Capture and set the parent field
of the constructed node.
From-SVN: r177275
Diffstat (limited to 'gcc/ada/exp_ch13.adb')
-rw-r--r-- | gcc/ada/exp_ch13.adb | 105 |
1 files changed, 104 insertions, 1 deletions
diff --git a/gcc/ada/exp_ch13.adb b/gcc/ada/exp_ch13.adb index a0250ec..d2143c1 100644 --- a/gcc/ada/exp_ch13.adb +++ b/gcc/ada/exp_ch13.adb @@ -205,6 +205,77 @@ package body Exp_Ch13 is end case; end Expand_N_Attribute_Definition_Clause; + ----------------------------- + -- Expand_N_Free_Statement -- + ----------------------------- + + procedure Expand_N_Free_Statement (N : Node_Id) is + Expr : constant Node_Id := Expression (N); + Typ : Entity_Id := Etype (Expr); + + begin + -- Use the base type to perform the collection check + + if Ekind (Typ) = E_Access_Subtype then + Typ := Etype (Typ); + end if; + + -- Handle private access types + + if Is_Private_Type (Typ) + and then Present (Full_View (Typ)) + then + Typ := Full_View (Typ); + end if; + + -- Do not create a custom Deallocate when freeing an object with + -- suppressed finalization. In such cases the object is never attached + -- to a collection, so it does not need to be detached. Use a regular + -- free statement instead. + + if No (Associated_Collection (Typ)) then + return; + end if; + + -- Use a temporary to store the result of a complex expression. Perform + -- the following transformation: + -- + -- Free (Complex_Expression); + -- + -- Temp : constant Type_Of_Expression := Complex_Expression; + -- Free (Temp); + + if Nkind (Expr) /= N_Identifier then + declare + Expr_Typ : constant Entity_Id := Etype (Expr); + Loc : constant Source_Ptr := Sloc (N); + New_Expr : Node_Id; + Temp_Id : Entity_Id; + + begin + Temp_Id := Make_Temporary (Loc, 'T'); + Insert_Action (N, + Make_Object_Declaration (Loc, + Defining_Identifier => Temp_Id, + Object_Definition => + New_Reference_To (Expr_Typ, Loc), + Expression => + Relocate_Node (Expr))); + + New_Expr := New_Reference_To (Temp_Id, Loc); + Set_Etype (New_Expr, Expr_Typ); + + Set_Expression (N, New_Expr); + end; + end if; + + -- Create a custom Deallocate for a controlled object. This routine + -- ensures that the hidden list header will be deallocated along with + -- the actual object. + + Build_Allocate_Deallocate_Proc (N, Is_Allocate => False); + end Expand_N_Free_Statement; + ---------------------------- -- Expand_N_Freeze_Entity -- ---------------------------- @@ -324,7 +395,39 @@ package body Exp_Ch13 is if In_Other_Scope then Push_Scope (E_Scope); - Install_Visible_Declarations (E_Scope); + + -- Finalizers are little odd in terms of freezing. The spec of the + -- procedure appears in the declarations while the body appears in + -- the statement part of a single construct. Since the finalizer must + -- be called by the At_End handler of the construct, the spec is + -- manually frozen right after its declaration. The only side effect + -- of this action appears in contexts where the construct is not in + -- its final resting place. These contexts are: + + -- * Entry bodies - The declarations and statements are moved to + -- the procedure equivalen of the entry. + -- * Protected subprograms - The declarations and statements are + -- moved to the non-protected version of the subprogram. + -- * Task bodies - The declarations and statements are moved to the + -- task body procedure. + + -- Visible declarations do not need to be installed in these three + -- cases since it does not make semantic sense to do so. All entities + -- referenced by a finalizer are visible and already resolved, plus + -- the enclosing scope may not have visible declarations at all. + + if Ekind (E) = E_Procedure + and then Is_Finalizer (E) + and then + (Is_Entry (E_Scope) + or else (Is_Subprogram (E_Scope) + and then Is_Protected_Type (Scope (E_Scope))) + or else Is_Task_Type (E_Scope)) + then + null; + else + Install_Visible_Declarations (E_Scope); + end if; if Is_Package_Or_Generic_Package (E_Scope) or else Is_Protected_Type (E_Scope) or else |