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Diffstat (limited to 'gcc/ada/libgnat/a-except.adb')
| -rw-r--r-- | gcc/ada/libgnat/a-except.adb | 1748 |
1 files changed, 1748 insertions, 0 deletions
diff --git a/gcc/ada/libgnat/a-except.adb b/gcc/ada/libgnat/a-except.adb new file mode 100644 index 0000000..1b8e625 --- /dev/null +++ b/gcc/ada/libgnat/a-except.adb @@ -0,0 +1,1748 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- A D A . E X C E P T I O N S -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2017, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +pragma Style_Checks (All_Checks); +-- No subprogram ordering check, due to logical grouping + +pragma Polling (Off); +-- We must turn polling off for this unit, because otherwise we get +-- elaboration circularities with System.Exception_Tables. + +with System; use System; +with System.Exceptions; use System.Exceptions; +with System.Exceptions_Debug; use System.Exceptions_Debug; +with System.Standard_Library; use System.Standard_Library; +with System.Soft_Links; use System.Soft_Links; +with System.WCh_Con; use System.WCh_Con; +with System.WCh_StW; use System.WCh_StW; + +pragma Warnings (Off); +-- Suppress complaints about Symbolic not being referenced, and about it not +-- having pragma Preelaborate. +with System.Traceback.Symbolic; +-- Bring Symbolic into the closure. If it is the s-trasym-dwarf.adb version, +-- it will install symbolic tracebacks as the default decorator. Otherwise, +-- symbolic tracebacks are not supported, and we fall back to hexadecimal +-- addresses. +pragma Warnings (On); + +package body Ada.Exceptions is + + pragma Suppress (All_Checks); + -- We definitely do not want exceptions occurring within this unit, or + -- we are in big trouble. If an exceptional situation does occur, better + -- that it not be raised, since raising it can cause confusing chaos. + + ----------------------- + -- Local Subprograms -- + ----------------------- + + -- Note: the exported subprograms in this package body are called directly + -- from C clients using the given external name, even though they are not + -- technically visible in the Ada sense. + + function Code_Address_For_AAA return System.Address; + function Code_Address_For_ZZZ return System.Address; + -- Return start and end of procedures in this package + -- + -- These procedures are used to provide exclusion bounds in + -- calls to Call_Chain at exception raise points from this unit. The + -- purpose is to arrange for the exception tracebacks not to include + -- frames from subprograms involved in the raise process, as these are + -- meaningless from the user's standpoint. + -- + -- For these bounds to be meaningful, we need to ensure that the object + -- code for the subprograms involved in processing a raise is located + -- after the object code Code_Address_For_AAA and before the object + -- code Code_Address_For_ZZZ. This will indeed be the case as long as + -- the following rules are respected: + -- + -- 1) The bodies of the subprograms involved in processing a raise + -- are located after the body of Code_Address_For_AAA and before the + -- body of Code_Address_For_ZZZ. + -- + -- 2) No pragma Inline applies to any of these subprograms, as this + -- could delay the corresponding assembly output until the end of + -- the unit. + + procedure Call_Chain (Excep : EOA); + -- Store up to Max_Tracebacks in Excep, corresponding to the current + -- call chain. + + function Image (Index : Integer) return String; + -- Return string image corresponding to Index + + procedure To_Stderr (S : String); + pragma Export (Ada, To_Stderr, "__gnat_to_stderr"); + -- Little routine to output string to stderr that is also used + -- in the tasking run time. + + procedure To_Stderr (C : Character); + pragma Inline (To_Stderr); + pragma Export (Ada, To_Stderr, "__gnat_to_stderr_char"); + -- Little routine to output a character to stderr, used by some of + -- the separate units below. + + package Exception_Data is + + ----------------------------------- + -- Exception Message Subprograms -- + ----------------------------------- + + procedure Set_Exception_C_Msg + (Excep : EOA; + Id : Exception_Id; + Msg1 : System.Address; + Line : Integer := 0; + Column : Integer := 0; + Msg2 : System.Address := System.Null_Address); + -- This routine is called to setup the exception referenced by X + -- to contain the indicated Id value and message. Msg1 is a null + -- terminated string which is generated as the exception message. If + -- line is non-zero, then a colon and the decimal representation of + -- this integer is appended to the message. Ditto for Column. When Msg2 + -- is non-null, a space and this additional null terminated string is + -- added to the message. + + procedure Set_Exception_Msg + (Excep : EOA; + Id : Exception_Id; + Message : String); + -- This routine is called to setup the exception referenced by X + -- to contain the indicated Id value and message. Message is a string + -- which is generated as the exception message. + + --------------------------------------- + -- Exception Information Subprograms -- + --------------------------------------- + + function Untailored_Exception_Information + (X : Exception_Occurrence) return String; + -- This is used by Stream_Attributes.EO_To_String to convert an + -- Exception_Occurrence to a String for the stream attributes. + -- String_To_EO understands the format, as documented here. + -- + -- The format of the string is as follows: + -- + -- raised <exception name> : <message> + -- (" : <message>" is present only if Exception_Message is not empty) + -- PID=nnnn (only if nonzero) + -- Call stack traceback locations: (only if at least one location) + -- <0xyyyyyyyy 0xyyyyyyyy ...> (is recorded) + -- + -- The lines are separated by a ASCII.LF character. + -- The nnnn is the partition Id given as decimal digits. + -- The 0x... line represents traceback program counter locations, in + -- execution order with the first one being the exception location. + -- + -- The Exception_Name and Message lines are omitted in the abort + -- signal case, since this is not really an exception. + -- + -- Note: If the format of the generated string is changed, please note + -- that an equivalent modification to the routine String_To_EO must be + -- made to preserve proper functioning of the stream attributes. + + function Exception_Information (X : Exception_Occurrence) return String; + -- This is the implementation of Ada.Exceptions.Exception_Information, + -- as defined in the Ada RM. + -- + -- If no traceback decorator (see GNAT.Exception_Traces) is currently + -- in place, this is the same as Untailored_Exception_Information. + -- Otherwise, the decorator is used to produce a symbolic traceback + -- instead of hexadecimal addresses. + -- + -- Note that unlike Untailored_Exception_Information, there is no need + -- to keep the output of Exception_Information stable for streaming + -- purposes, and in fact the output differs across platforms. + + end Exception_Data; + + package Exception_Traces is + + ------------------------------------------------- + -- Run-Time Exception Notification Subprograms -- + ------------------------------------------------- + + -- These subprograms provide a common run-time interface to trigger the + -- actions required when an exception is about to be propagated (e.g. + -- user specified actions or output of exception information). They are + -- exported to be usable by the Ada exception handling personality + -- routine when the GCC 3 mechanism is used. + + procedure Notify_Handled_Exception (Excep : EOA); + pragma Export + (C, Notify_Handled_Exception, "__gnat_notify_handled_exception"); + -- This routine is called for a handled occurrence is about to be + -- propagated. + + procedure Notify_Unhandled_Exception (Excep : EOA); + pragma Export + (C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception"); + -- This routine is called when an unhandled occurrence is about to be + -- propagated. + + procedure Unhandled_Exception_Terminate (Excep : EOA); + pragma No_Return (Unhandled_Exception_Terminate); + -- This procedure is called to terminate execution following an + -- unhandled exception. The exception information, including + -- traceback if available is output, and execution is then + -- terminated. Note that at the point where this routine is + -- called, the stack has typically been destroyed. + + end Exception_Traces; + + package Exception_Propagation is + + --------------------------------------- + -- Exception Propagation Subprograms -- + --------------------------------------- + + function Allocate_Occurrence return EOA; + -- Allocate an exception occurrence (as well as the machine occurrence) + + procedure Propagate_Exception (Excep : EOA); + pragma No_Return (Propagate_Exception); + -- This procedure propagates the exception represented by Excep + + end Exception_Propagation; + + package Stream_Attributes is + + ---------------------------------- + -- Stream Attribute Subprograms -- + ---------------------------------- + + function EId_To_String (X : Exception_Id) return String; + function String_To_EId (S : String) return Exception_Id; + -- Functions for implementing Exception_Id stream attributes + + function EO_To_String (X : Exception_Occurrence) return String; + function String_To_EO (S : String) return Exception_Occurrence; + -- Functions for implementing Exception_Occurrence stream + -- attributes + + end Stream_Attributes; + + procedure Complete_Occurrence (X : EOA); + -- Finish building the occurrence: save the call chain and notify the + -- debugger. + + procedure Complete_And_Propagate_Occurrence (X : EOA); + pragma No_Return (Complete_And_Propagate_Occurrence); + -- This is a simple wrapper to Complete_Occurrence and + -- Exception_Propagation.Propagate_Exception. + + function Create_Occurrence_From_Signal_Handler + (E : Exception_Id; + M : System.Address) return EOA; + -- Create and build an exception occurrence using exception id E and + -- nul-terminated message M. + + function Create_Machine_Occurrence_From_Signal_Handler + (E : Exception_Id; + M : System.Address) return System.Address; + pragma Export (C, Create_Machine_Occurrence_From_Signal_Handler, + "__gnat_create_machine_occurrence_from_signal_handler"); + -- Create and build an exception occurrence using exception id E and + -- nul-terminated message M. Return the machine occurrence. + + procedure Raise_Exception_No_Defer + (E : Exception_Id; + Message : String := ""); + pragma Export + (Ada, Raise_Exception_No_Defer, + "ada__exceptions__raise_exception_no_defer"); + pragma No_Return (Raise_Exception_No_Defer); + -- Similar to Raise_Exception, but with no abort deferral + + procedure Raise_With_Msg (E : Exception_Id); + pragma No_Return (Raise_With_Msg); + pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg"); + -- Raises an exception with given exception id value. A message + -- is associated with the raise, and has already been stored in the + -- exception occurrence referenced by the Current_Excep in the TSD. + -- Abort is deferred before the raise call. + + procedure Raise_With_Location_And_Msg + (E : Exception_Id; + F : System.Address; + L : Integer; + C : Integer := 0; + M : System.Address := System.Null_Address); + pragma No_Return (Raise_With_Location_And_Msg); + -- Raise an exception with given exception id value. A filename and line + -- number is associated with the raise and is stored in the exception + -- occurrence and in addition a column and a string message M may be + -- appended to this (if not null/0). + + procedure Raise_Constraint_Error (File : System.Address; Line : Integer); + pragma No_Return (Raise_Constraint_Error); + pragma Export (C, Raise_Constraint_Error, "__gnat_raise_constraint_error"); + -- Raise constraint error with file:line information + + procedure Raise_Constraint_Error_Msg + (File : System.Address; + Line : Integer; + Column : Integer; + Msg : System.Address); + pragma No_Return (Raise_Constraint_Error_Msg); + pragma Export + (C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg"); + -- Raise constraint error with file:line:col + msg information + + procedure Raise_Program_Error (File : System.Address; Line : Integer); + pragma No_Return (Raise_Program_Error); + pragma Export (C, Raise_Program_Error, "__gnat_raise_program_error"); + -- Raise program error with file:line information + + procedure Raise_Program_Error_Msg + (File : System.Address; + Line : Integer; + Msg : System.Address); + pragma No_Return (Raise_Program_Error_Msg); + pragma Export + (C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg"); + -- Raise program error with file:line + msg information + + procedure Raise_Storage_Error (File : System.Address; Line : Integer); + pragma No_Return (Raise_Storage_Error); + pragma Export (C, Raise_Storage_Error, "__gnat_raise_storage_error"); + -- Raise storage error with file:line information + + procedure Raise_Storage_Error_Msg + (File : System.Address; + Line : Integer; + Msg : System.Address); + pragma No_Return (Raise_Storage_Error_Msg); + pragma Export + (C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg"); + -- Raise storage error with file:line + reason msg information + + -- The exception raising process and the automatic tracing mechanism rely + -- on some careful use of flags attached to the exception occurrence. The + -- graph below illustrates the relations between the Raise_ subprograms + -- and identifies the points where basic flags such as Exception_Raised + -- are initialized. + + -- (i) signs indicate the flags initialization points. R stands for Raise, + -- W for With, and E for Exception. + + -- R_No_Msg R_E R_Pe R_Ce R_Se + -- | | | | | + -- +--+ +--+ +---+ | +---+ + -- | | | | | + -- R_E_No_Defer(i) R_W_Msg(i) R_W_Loc + -- | | | | + -- +------------+ | +-----------+ +--+ + -- | | | | + -- | | | Set_E_C_Msg(i) + -- | | | + -- Complete_And_Propagate_Occurrence + + procedure Reraise; + pragma No_Return (Reraise); + pragma Export (C, Reraise, "__gnat_reraise"); + -- Reraises the exception referenced by the Current_Excep field + -- of the TSD (all fields of this exception occurrence are set). + -- Abort is deferred before the reraise operation. Called from + -- System.Tasking.RendezVous.Exceptional_Complete_RendezVous + + procedure Transfer_Occurrence + (Target : Exception_Occurrence_Access; + Source : Exception_Occurrence); + pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence"); + -- Called from s-tasren.adb:Local_Complete_RendezVous and + -- s-tpobop.adb:Exceptional_Complete_Entry_Body to setup Target from + -- Source as an exception to be propagated in the caller task. Target is + -- expected to be a pointer to the fixed TSD occurrence for this task. + + -------------------------------- + -- Run-Time Check Subprograms -- + -------------------------------- + + -- These subprograms raise a specific exception with a reason message + -- attached. The parameters are the file name and line number in each + -- case. The names are defined by Exp_Ch11.Get_RT_Exception_Name. + + procedure Rcheck_CE_Access_Check + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Null_Access_Parameter + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Discriminant_Check + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Divide_By_Zero + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Explicit_Raise + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Index_Check + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Invalid_Data + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Length_Check + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Null_Exception_Id + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Null_Not_Allowed + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Overflow_Check + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Partition_Check + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Range_Check + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Tag_Check + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Access_Before_Elaboration + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Accessibility_Check + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Address_Of_Intrinsic + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Aliased_Parameters + (File : System.Address; Line : Integer); + procedure Rcheck_PE_All_Guards_Closed + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Bad_Predicated_Generic_Type + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Current_Task_In_Entry_Body + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Duplicated_Entry_Address + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Explicit_Raise + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Implicit_Return + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Misaligned_Address_Value + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Missing_Return + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Non_Transportable_Actual + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Overlaid_Controlled_Object + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Potentially_Blocking_Operation + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Stubbed_Subprogram_Called + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Unchecked_Union_Restriction + (File : System.Address; Line : Integer); + procedure Rcheck_SE_Empty_Storage_Pool + (File : System.Address; Line : Integer); + procedure Rcheck_SE_Explicit_Raise + (File : System.Address; Line : Integer); + procedure Rcheck_SE_Infinite_Recursion + (File : System.Address; Line : Integer); + procedure Rcheck_SE_Object_Too_Large + (File : System.Address; Line : Integer); + procedure Rcheck_PE_Stream_Operation_Not_Allowed + (File : System.Address; Line : Integer); + procedure Rcheck_CE_Access_Check_Ext + (File : System.Address; Line, Column : Integer); + procedure Rcheck_CE_Index_Check_Ext + (File : System.Address; Line, Column, Index, First, Last : Integer); + procedure Rcheck_CE_Invalid_Data_Ext + (File : System.Address; Line, Column, Index, First, Last : Integer); + procedure Rcheck_CE_Range_Check_Ext + (File : System.Address; Line, Column, Index, First, Last : Integer); + + procedure Rcheck_PE_Finalize_Raised_Exception + (File : System.Address; Line : Integer); + -- This routine is separated out because it has quite different behavior + -- from the others. This is the "finalize/adjust raised exception". This + -- subprogram is always called with abort deferred, unlike all other + -- Rcheck_* subprograms, it needs to call Raise_Exception_No_Defer. + + pragma Export (C, Rcheck_CE_Access_Check, + "__gnat_rcheck_CE_Access_Check"); + pragma Export (C, Rcheck_CE_Null_Access_Parameter, + "__gnat_rcheck_CE_Null_Access_Parameter"); + pragma Export (C, Rcheck_CE_Discriminant_Check, + "__gnat_rcheck_CE_Discriminant_Check"); + pragma Export (C, Rcheck_CE_Divide_By_Zero, + "__gnat_rcheck_CE_Divide_By_Zero"); + pragma Export (C, Rcheck_CE_Explicit_Raise, + "__gnat_rcheck_CE_Explicit_Raise"); + pragma Export (C, Rcheck_CE_Index_Check, + "__gnat_rcheck_CE_Index_Check"); + pragma Export (C, Rcheck_CE_Invalid_Data, + "__gnat_rcheck_CE_Invalid_Data"); + pragma Export (C, Rcheck_CE_Length_Check, + "__gnat_rcheck_CE_Length_Check"); + pragma Export (C, Rcheck_CE_Null_Exception_Id, + "__gnat_rcheck_CE_Null_Exception_Id"); + pragma Export (C, Rcheck_CE_Null_Not_Allowed, + "__gnat_rcheck_CE_Null_Not_Allowed"); + pragma Export (C, Rcheck_CE_Overflow_Check, + "__gnat_rcheck_CE_Overflow_Check"); + pragma Export (C, Rcheck_CE_Partition_Check, + "__gnat_rcheck_CE_Partition_Check"); + pragma Export (C, Rcheck_CE_Range_Check, + "__gnat_rcheck_CE_Range_Check"); + pragma Export (C, Rcheck_CE_Tag_Check, + "__gnat_rcheck_CE_Tag_Check"); + pragma Export (C, Rcheck_PE_Access_Before_Elaboration, + "__gnat_rcheck_PE_Access_Before_Elaboration"); + pragma Export (C, Rcheck_PE_Accessibility_Check, + "__gnat_rcheck_PE_Accessibility_Check"); + pragma Export (C, Rcheck_PE_Address_Of_Intrinsic, + "__gnat_rcheck_PE_Address_Of_Intrinsic"); + pragma Export (C, Rcheck_PE_Aliased_Parameters, + "__gnat_rcheck_PE_Aliased_Parameters"); + pragma Export (C, Rcheck_PE_All_Guards_Closed, + "__gnat_rcheck_PE_All_Guards_Closed"); + pragma Export (C, Rcheck_PE_Bad_Predicated_Generic_Type, + "__gnat_rcheck_PE_Bad_Predicated_Generic_Type"); + pragma Export (C, Rcheck_PE_Current_Task_In_Entry_Body, + "__gnat_rcheck_PE_Current_Task_In_Entry_Body"); + pragma Export (C, Rcheck_PE_Duplicated_Entry_Address, + "__gnat_rcheck_PE_Duplicated_Entry_Address"); + pragma Export (C, Rcheck_PE_Explicit_Raise, + "__gnat_rcheck_PE_Explicit_Raise"); + pragma Export (C, Rcheck_PE_Finalize_Raised_Exception, + "__gnat_rcheck_PE_Finalize_Raised_Exception"); + pragma Export (C, Rcheck_PE_Implicit_Return, + "__gnat_rcheck_PE_Implicit_Return"); + pragma Export (C, Rcheck_PE_Misaligned_Address_Value, + "__gnat_rcheck_PE_Misaligned_Address_Value"); + pragma Export (C, Rcheck_PE_Missing_Return, + "__gnat_rcheck_PE_Missing_Return"); + pragma Export (C, Rcheck_PE_Non_Transportable_Actual, + "__gnat_rcheck_PE_Non_Transportable_Actual"); + pragma Export (C, Rcheck_PE_Overlaid_Controlled_Object, + "__gnat_rcheck_PE_Overlaid_Controlled_Object"); + pragma Export (C, Rcheck_PE_Potentially_Blocking_Operation, + "__gnat_rcheck_PE_Potentially_Blocking_Operation"); + pragma Export (C, Rcheck_PE_Stream_Operation_Not_Allowed, + "__gnat_rcheck_PE_Stream_Operation_Not_Allowed"); + pragma Export (C, Rcheck_PE_Stubbed_Subprogram_Called, + "__gnat_rcheck_PE_Stubbed_Subprogram_Called"); + pragma Export (C, Rcheck_PE_Unchecked_Union_Restriction, + "__gnat_rcheck_PE_Unchecked_Union_Restriction"); + pragma Export (C, Rcheck_SE_Empty_Storage_Pool, + "__gnat_rcheck_SE_Empty_Storage_Pool"); + pragma Export (C, Rcheck_SE_Explicit_Raise, + "__gnat_rcheck_SE_Explicit_Raise"); + pragma Export (C, Rcheck_SE_Infinite_Recursion, + "__gnat_rcheck_SE_Infinite_Recursion"); + pragma Export (C, Rcheck_SE_Object_Too_Large, + "__gnat_rcheck_SE_Object_Too_Large"); + + pragma Export (C, Rcheck_CE_Access_Check_Ext, + "__gnat_rcheck_CE_Access_Check_ext"); + pragma Export (C, Rcheck_CE_Index_Check_Ext, + "__gnat_rcheck_CE_Index_Check_ext"); + pragma Export (C, Rcheck_CE_Invalid_Data_Ext, + "__gnat_rcheck_CE_Invalid_Data_ext"); + pragma Export (C, Rcheck_CE_Range_Check_Ext, + "__gnat_rcheck_CE_Range_Check_ext"); + + -- None of these procedures ever returns (they raise an exception). By + -- using pragma No_Return, we ensure that any junk code after the call, + -- such as normal return epilogue stuff, can be eliminated). + + pragma No_Return (Rcheck_CE_Access_Check); + pragma No_Return (Rcheck_CE_Null_Access_Parameter); + pragma No_Return (Rcheck_CE_Discriminant_Check); + pragma No_Return (Rcheck_CE_Divide_By_Zero); + pragma No_Return (Rcheck_CE_Explicit_Raise); + pragma No_Return (Rcheck_CE_Index_Check); + pragma No_Return (Rcheck_CE_Invalid_Data); + pragma No_Return (Rcheck_CE_Length_Check); + pragma No_Return (Rcheck_CE_Null_Exception_Id); + pragma No_Return (Rcheck_CE_Null_Not_Allowed); + pragma No_Return (Rcheck_CE_Overflow_Check); + pragma No_Return (Rcheck_CE_Partition_Check); + pragma No_Return (Rcheck_CE_Range_Check); + pragma No_Return (Rcheck_CE_Tag_Check); + pragma No_Return (Rcheck_PE_Access_Before_Elaboration); + pragma No_Return (Rcheck_PE_Accessibility_Check); + pragma No_Return (Rcheck_PE_Address_Of_Intrinsic); + pragma No_Return (Rcheck_PE_Aliased_Parameters); + pragma No_Return (Rcheck_PE_All_Guards_Closed); + pragma No_Return (Rcheck_PE_Bad_Predicated_Generic_Type); + pragma No_Return (Rcheck_PE_Current_Task_In_Entry_Body); + pragma No_Return (Rcheck_PE_Duplicated_Entry_Address); + pragma No_Return (Rcheck_PE_Explicit_Raise); + pragma No_Return (Rcheck_PE_Implicit_Return); + pragma No_Return (Rcheck_PE_Misaligned_Address_Value); + pragma No_Return (Rcheck_PE_Missing_Return); + pragma No_Return (Rcheck_PE_Non_Transportable_Actual); + pragma No_Return (Rcheck_PE_Overlaid_Controlled_Object); + pragma No_Return (Rcheck_PE_Potentially_Blocking_Operation); + pragma No_Return (Rcheck_PE_Stream_Operation_Not_Allowed); + pragma No_Return (Rcheck_PE_Stubbed_Subprogram_Called); + pragma No_Return (Rcheck_PE_Unchecked_Union_Restriction); + pragma No_Return (Rcheck_PE_Finalize_Raised_Exception); + pragma No_Return (Rcheck_SE_Empty_Storage_Pool); + pragma No_Return (Rcheck_SE_Explicit_Raise); + pragma No_Return (Rcheck_SE_Infinite_Recursion); + pragma No_Return (Rcheck_SE_Object_Too_Large); + + pragma No_Return (Rcheck_CE_Access_Check_Ext); + pragma No_Return (Rcheck_CE_Index_Check_Ext); + pragma No_Return (Rcheck_CE_Invalid_Data_Ext); + pragma No_Return (Rcheck_CE_Range_Check_Ext); + + --------------------------------------------- + -- Reason Strings for Run-Time Check Calls -- + --------------------------------------------- + + -- These strings are null-terminated and are used by Rcheck_nn. The + -- strings correspond to the definitions for Types.RT_Exception_Code. + + use ASCII; + + Rmsg_00 : constant String := "access check failed" & NUL; + Rmsg_01 : constant String := "access parameter is null" & NUL; + Rmsg_02 : constant String := "discriminant check failed" & NUL; + Rmsg_03 : constant String := "divide by zero" & NUL; + Rmsg_04 : constant String := "explicit raise" & NUL; + Rmsg_05 : constant String := "index check failed" & NUL; + Rmsg_06 : constant String := "invalid data" & NUL; + Rmsg_07 : constant String := "length check failed" & NUL; + Rmsg_08 : constant String := "null Exception_Id" & NUL; + Rmsg_09 : constant String := "null-exclusion check failed" & NUL; + Rmsg_10 : constant String := "overflow check failed" & NUL; + Rmsg_11 : constant String := "partition check failed" & NUL; + Rmsg_12 : constant String := "range check failed" & NUL; + Rmsg_13 : constant String := "tag check failed" & NUL; + Rmsg_14 : constant String := "access before elaboration" & NUL; + Rmsg_15 : constant String := "accessibility check failed" & NUL; + Rmsg_16 : constant String := "attempt to take address of" & + " intrinsic subprogram" & NUL; + Rmsg_17 : constant String := "aliased parameters" & NUL; + Rmsg_18 : constant String := "all guards closed" & NUL; + Rmsg_19 : constant String := "improper use of generic subtype" & + " with predicate" & NUL; + Rmsg_20 : constant String := "Current_Task referenced in entry" & + " body" & NUL; + Rmsg_21 : constant String := "duplicated entry address" & NUL; + Rmsg_22 : constant String := "explicit raise" & NUL; + Rmsg_23 : constant String := "finalize/adjust raised exception" & NUL; + Rmsg_24 : constant String := "implicit return with No_Return" & NUL; + Rmsg_25 : constant String := "misaligned address value" & NUL; + Rmsg_26 : constant String := "missing return" & NUL; + Rmsg_27 : constant String := "overlaid controlled object" & NUL; + Rmsg_28 : constant String := "potentially blocking operation" & NUL; + Rmsg_29 : constant String := "stubbed subprogram called" & NUL; + Rmsg_30 : constant String := "unchecked union restriction" & NUL; + Rmsg_31 : constant String := "actual/returned class-wide" & + " value not transportable" & NUL; + Rmsg_32 : constant String := "empty storage pool" & NUL; + Rmsg_33 : constant String := "explicit raise" & NUL; + Rmsg_34 : constant String := "infinite recursion" & NUL; + Rmsg_35 : constant String := "object too large" & NUL; + Rmsg_36 : constant String := "stream operation not allowed" & NUL; + + ----------------------- + -- Polling Interface -- + ----------------------- + + type Unsigned is mod 2 ** 32; + + Counter : Unsigned := 0; + pragma Warnings (Off, Counter); + -- This counter is provided for convenience. It can be used in Poll to + -- perform periodic but not systematic operations. + + procedure Poll is separate; + -- The actual polling routine is separate, so that it can easily be + -- replaced with a target dependent version. + + -------------------------- + -- Code_Address_For_AAA -- + -------------------------- + + -- This function gives us the start of the PC range for addresses within + -- the exception unit itself. We hope that gigi/gcc keep all the procedures + -- in their original order. + + function Code_Address_For_AAA return System.Address is + begin + -- We are using a label instead of Code_Address_For_AAA'Address because + -- on some platforms the latter does not yield the address we want, but + -- the address of a stub or of a descriptor instead. This is the case at + -- least on PA-HPUX. + + <<Start_Of_AAA>> + return Start_Of_AAA'Address; + end Code_Address_For_AAA; + + ---------------- + -- Call_Chain -- + ---------------- + + procedure Call_Chain (Excep : EOA) is separate; + -- The actual Call_Chain routine is separate, so that it can easily + -- be dummied out when no exception traceback information is needed. + + ------------------- + -- EId_To_String -- + ------------------- + + function EId_To_String (X : Exception_Id) return String + renames Stream_Attributes.EId_To_String; + + ------------------ + -- EO_To_String -- + ------------------ + + -- We use the null string to represent the null occurrence, otherwise we + -- output the Untailored_Exception_Information string for the occurrence. + + function EO_To_String (X : Exception_Occurrence) return String + renames Stream_Attributes.EO_To_String; + + ------------------------ + -- Exception_Identity -- + ------------------------ + + function Exception_Identity + (X : Exception_Occurrence) return Exception_Id + is + begin + -- Note that the following test used to be here for the original + -- Ada 95 semantics, but these were modified by AI-241 to require + -- returning Null_Id instead of raising Constraint_Error. + + -- if X.Id = Null_Id then + -- raise Constraint_Error; + -- end if; + + return X.Id; + end Exception_Identity; + + --------------------------- + -- Exception_Information -- + --------------------------- + + function Exception_Information (X : Exception_Occurrence) return String is + begin + if X.Id = Null_Id then + raise Constraint_Error; + else + return Exception_Data.Exception_Information (X); + end if; + end Exception_Information; + + ----------------------- + -- Exception_Message -- + ----------------------- + + function Exception_Message (X : Exception_Occurrence) return String is + begin + if X.Id = Null_Id then + raise Constraint_Error; + else + return X.Msg (1 .. X.Msg_Length); + end if; + end Exception_Message; + + -------------------- + -- Exception_Name -- + -------------------- + + function Exception_Name (Id : Exception_Id) return String is + begin + if Id = null then + raise Constraint_Error; + else + return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1); + end if; + end Exception_Name; + + function Exception_Name (X : Exception_Occurrence) return String is + begin + return Exception_Name (X.Id); + end Exception_Name; + + --------------------------- + -- Exception_Name_Simple -- + --------------------------- + + function Exception_Name_Simple (X : Exception_Occurrence) return String is + Name : constant String := Exception_Name (X); + P : Natural; + + begin + P := Name'Length; + while P > 1 loop + exit when Name (P - 1) = '.'; + P := P - 1; + end loop; + + -- Return result making sure lower bound is 1 + + declare + subtype Rname is String (1 .. Name'Length - P + 1); + begin + return Rname (Name (P .. Name'Length)); + end; + end Exception_Name_Simple; + + -------------------- + -- Exception_Data -- + -------------------- + + package body Exception_Data is separate; + -- This package can be easily dummied out if we do not want the basic + -- support for exception messages (such as in Ada 83). + + --------------------------- + -- Exception_Propagation -- + --------------------------- + + package body Exception_Propagation is separate; + -- Depending on the actual exception mechanism used (front-end or + -- back-end based), the implementation will differ, which is why this + -- package is separated. + + ---------------------- + -- Exception_Traces -- + ---------------------- + + package body Exception_Traces is separate; + -- Depending on the underlying support for IO the implementation will + -- differ. Moreover we would like to dummy out this package in case we + -- do not want any exception tracing support. This is why this package + -- is separated. + + -------------------------------------- + -- Get_Exception_Machine_Occurrence -- + -------------------------------------- + + function Get_Exception_Machine_Occurrence + (X : Exception_Occurrence) return System.Address + is + begin + return X.Machine_Occurrence; + end Get_Exception_Machine_Occurrence; + + ----------- + -- Image -- + ----------- + + function Image (Index : Integer) return String is + Result : constant String := Integer'Image (Index); + begin + if Result (1) = ' ' then + return Result (2 .. Result'Last); + else + return Result; + end if; + end Image; + + ----------------------- + -- Stream Attributes -- + ----------------------- + + package body Stream_Attributes is separate; + -- This package can be easily dummied out if we do not want the + -- support for streaming Exception_Ids and Exception_Occurrences. + + ---------------------------- + -- Raise_Constraint_Error -- + ---------------------------- + + procedure Raise_Constraint_Error (File : System.Address; Line : Integer) is + begin + Raise_With_Location_And_Msg (Constraint_Error_Def'Access, File, Line); + end Raise_Constraint_Error; + + -------------------------------- + -- Raise_Constraint_Error_Msg -- + -------------------------------- + + procedure Raise_Constraint_Error_Msg + (File : System.Address; + Line : Integer; + Column : Integer; + Msg : System.Address) + is + begin + Raise_With_Location_And_Msg + (Constraint_Error_Def'Access, File, Line, Column, Msg); + end Raise_Constraint_Error_Msg; + + ------------------------- + -- Complete_Occurrence -- + ------------------------- + + procedure Complete_Occurrence (X : EOA) is + begin + -- Compute the backtrace for this occurrence if the corresponding + -- binder option has been set. Call_Chain takes care of the reraise + -- case. + + -- ??? Using Call_Chain here means we are going to walk up the stack + -- once only for backtracing purposes before doing it again for the + -- propagation per se. + + -- The first inspection is much lighter, though, as it only requires + -- partial unwinding of each frame. Additionally, although we could use + -- the personality routine to record the addresses while propagating, + -- this method has two drawbacks: + + -- 1) the trace is incomplete if the exception is handled since we + -- don't walk past the frame with the handler, + + -- and + + -- 2) we would miss the frames for which our personality routine is not + -- called, e.g. if C or C++ calls are on the way. + + Call_Chain (X); + + -- Notify the debugger + Debug_Raise_Exception + (E => SSL.Exception_Data_Ptr (X.Id), + Message => X.Msg (1 .. X.Msg_Length)); + end Complete_Occurrence; + + --------------------------------------- + -- Complete_And_Propagate_Occurrence -- + --------------------------------------- + + procedure Complete_And_Propagate_Occurrence (X : EOA) is + begin + Complete_Occurrence (X); + Exception_Propagation.Propagate_Exception (X); + end Complete_And_Propagate_Occurrence; + + --------------------- + -- Raise_Exception -- + --------------------- + + procedure Raise_Exception + (E : Exception_Id; + Message : String := "") + is + EF : Exception_Id := E; + begin + -- Raise CE if E = Null_ID (AI-446) + + if E = null then + EF := Constraint_Error'Identity; + end if; + + -- Go ahead and raise appropriate exception + + Raise_Exception_Always (EF, Message); + end Raise_Exception; + + ---------------------------- + -- Raise_Exception_Always -- + ---------------------------- + + procedure Raise_Exception_Always + (E : Exception_Id; + Message : String := "") + is + X : constant EOA := Exception_Propagation.Allocate_Occurrence; + + begin + Exception_Data.Set_Exception_Msg (X, E, Message); + + if not ZCX_By_Default then + Abort_Defer.all; + end if; + + Complete_And_Propagate_Occurrence (X); + end Raise_Exception_Always; + + ------------------------------ + -- Raise_Exception_No_Defer -- + ------------------------------ + + procedure Raise_Exception_No_Defer + (E : Exception_Id; + Message : String := "") + is + X : constant EOA := Exception_Propagation.Allocate_Occurrence; + + begin + Exception_Data.Set_Exception_Msg (X, E, Message); + + -- Do not call Abort_Defer.all, as specified by the spec + + Complete_And_Propagate_Occurrence (X); + end Raise_Exception_No_Defer; + + ------------------------------------- + -- Raise_From_Controlled_Operation -- + ------------------------------------- + + procedure Raise_From_Controlled_Operation + (X : Ada.Exceptions.Exception_Occurrence) + is + Prefix : constant String := "adjust/finalize raised "; + Orig_Msg : constant String := Exception_Message (X); + Orig_Prefix_Length : constant Natural := + Integer'Min (Prefix'Length, Orig_Msg'Length); + + Orig_Prefix : String renames + Orig_Msg (Orig_Msg'First .. Orig_Msg'First + Orig_Prefix_Length - 1); + + begin + -- Message already has the proper prefix, just re-raise + + if Orig_Prefix = Prefix then + Raise_Exception_No_Defer + (E => Program_Error'Identity, + Message => Orig_Msg); + + else + declare + New_Msg : constant String := Prefix & Exception_Name (X); + + begin + -- No message present, just provide our own + + if Orig_Msg = "" then + Raise_Exception_No_Defer + (E => Program_Error'Identity, + Message => New_Msg); + + -- Message present, add informational prefix + + else + Raise_Exception_No_Defer + (E => Program_Error'Identity, + Message => New_Msg & ": " & Orig_Msg); + end if; + end; + end if; + end Raise_From_Controlled_Operation; + + ------------------------------------------- + -- Create_Occurrence_From_Signal_Handler -- + ------------------------------------------- + + function Create_Occurrence_From_Signal_Handler + (E : Exception_Id; + M : System.Address) return EOA + is + X : constant EOA := Exception_Propagation.Allocate_Occurrence; + + begin + Exception_Data.Set_Exception_C_Msg (X, E, M); + + if not ZCX_By_Default then + Abort_Defer.all; + end if; + + Complete_Occurrence (X); + return X; + end Create_Occurrence_From_Signal_Handler; + + --------------------------------------------------- + -- Create_Machine_Occurrence_From_Signal_Handler -- + --------------------------------------------------- + + function Create_Machine_Occurrence_From_Signal_Handler + (E : Exception_Id; + M : System.Address) return System.Address + is + begin + return Create_Occurrence_From_Signal_Handler (E, M).Machine_Occurrence; + end Create_Machine_Occurrence_From_Signal_Handler; + + ------------------------------- + -- Raise_From_Signal_Handler -- + ------------------------------- + + procedure Raise_From_Signal_Handler + (E : Exception_Id; + M : System.Address) + is + begin + Exception_Propagation.Propagate_Exception + (Create_Occurrence_From_Signal_Handler (E, M)); + end Raise_From_Signal_Handler; + + ------------------------- + -- Raise_Program_Error -- + ------------------------- + + procedure Raise_Program_Error + (File : System.Address; + Line : Integer) + is + begin + Raise_With_Location_And_Msg (Program_Error_Def'Access, File, Line); + end Raise_Program_Error; + + ----------------------------- + -- Raise_Program_Error_Msg -- + ----------------------------- + + procedure Raise_Program_Error_Msg + (File : System.Address; + Line : Integer; + Msg : System.Address) + is + begin + Raise_With_Location_And_Msg + (Program_Error_Def'Access, File, Line, M => Msg); + end Raise_Program_Error_Msg; + + ------------------------- + -- Raise_Storage_Error -- + ------------------------- + + procedure Raise_Storage_Error + (File : System.Address; + Line : Integer) + is + begin + Raise_With_Location_And_Msg (Storage_Error_Def'Access, File, Line); + end Raise_Storage_Error; + + ----------------------------- + -- Raise_Storage_Error_Msg -- + ----------------------------- + + procedure Raise_Storage_Error_Msg + (File : System.Address; + Line : Integer; + Msg : System.Address) + is + begin + Raise_With_Location_And_Msg + (Storage_Error_Def'Access, File, Line, M => Msg); + end Raise_Storage_Error_Msg; + + --------------------------------- + -- Raise_With_Location_And_Msg -- + --------------------------------- + + procedure Raise_With_Location_And_Msg + (E : Exception_Id; + F : System.Address; + L : Integer; + C : Integer := 0; + M : System.Address := System.Null_Address) + is + X : constant EOA := Exception_Propagation.Allocate_Occurrence; + begin + Exception_Data.Set_Exception_C_Msg (X, E, F, L, C, M); + + if not ZCX_By_Default then + Abort_Defer.all; + end if; + + Complete_And_Propagate_Occurrence (X); + end Raise_With_Location_And_Msg; + + -------------------- + -- Raise_With_Msg -- + -------------------- + + procedure Raise_With_Msg (E : Exception_Id) is + Excep : constant EOA := Exception_Propagation.Allocate_Occurrence; + Ex : constant Exception_Occurrence_Access := Get_Current_Excep.all; + begin + Excep.Exception_Raised := False; + Excep.Id := E; + Excep.Num_Tracebacks := 0; + Excep.Pid := Local_Partition_ID; + + -- Copy the message from the current exception + -- Change the interface to be called with an occurrence ??? + + Excep.Msg_Length := Ex.Msg_Length; + Excep.Msg (1 .. Excep.Msg_Length) := Ex.Msg (1 .. Ex.Msg_Length); + + -- The following is a common pattern, should be abstracted + -- into a procedure call ??? + + if not ZCX_By_Default then + Abort_Defer.all; + end if; + + Complete_And_Propagate_Occurrence (Excep); + end Raise_With_Msg; + + ----------------------------------------- + -- Calls to Run-Time Check Subprograms -- + ----------------------------------------- + + procedure Rcheck_CE_Access_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_00'Address); + end Rcheck_CE_Access_Check; + + procedure Rcheck_CE_Null_Access_Parameter + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_01'Address); + end Rcheck_CE_Null_Access_Parameter; + + procedure Rcheck_CE_Discriminant_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_02'Address); + end Rcheck_CE_Discriminant_Check; + + procedure Rcheck_CE_Divide_By_Zero + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_03'Address); + end Rcheck_CE_Divide_By_Zero; + + procedure Rcheck_CE_Explicit_Raise + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_04'Address); + end Rcheck_CE_Explicit_Raise; + + procedure Rcheck_CE_Index_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_05'Address); + end Rcheck_CE_Index_Check; + + procedure Rcheck_CE_Invalid_Data + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_06'Address); + end Rcheck_CE_Invalid_Data; + + procedure Rcheck_CE_Length_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_07'Address); + end Rcheck_CE_Length_Check; + + procedure Rcheck_CE_Null_Exception_Id + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_08'Address); + end Rcheck_CE_Null_Exception_Id; + + procedure Rcheck_CE_Null_Not_Allowed + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_09'Address); + end Rcheck_CE_Null_Not_Allowed; + + procedure Rcheck_CE_Overflow_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_10'Address); + end Rcheck_CE_Overflow_Check; + + procedure Rcheck_CE_Partition_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_11'Address); + end Rcheck_CE_Partition_Check; + + procedure Rcheck_CE_Range_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_12'Address); + end Rcheck_CE_Range_Check; + + procedure Rcheck_CE_Tag_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, 0, Rmsg_13'Address); + end Rcheck_CE_Tag_Check; + + procedure Rcheck_PE_Access_Before_Elaboration + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_14'Address); + end Rcheck_PE_Access_Before_Elaboration; + + procedure Rcheck_PE_Accessibility_Check + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_15'Address); + end Rcheck_PE_Accessibility_Check; + + procedure Rcheck_PE_Address_Of_Intrinsic + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_16'Address); + end Rcheck_PE_Address_Of_Intrinsic; + + procedure Rcheck_PE_Aliased_Parameters + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_17'Address); + end Rcheck_PE_Aliased_Parameters; + + procedure Rcheck_PE_All_Guards_Closed + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_18'Address); + end Rcheck_PE_All_Guards_Closed; + + procedure Rcheck_PE_Bad_Predicated_Generic_Type + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_19'Address); + end Rcheck_PE_Bad_Predicated_Generic_Type; + + procedure Rcheck_PE_Current_Task_In_Entry_Body + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_20'Address); + end Rcheck_PE_Current_Task_In_Entry_Body; + + procedure Rcheck_PE_Duplicated_Entry_Address + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_21'Address); + end Rcheck_PE_Duplicated_Entry_Address; + + procedure Rcheck_PE_Explicit_Raise + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_22'Address); + end Rcheck_PE_Explicit_Raise; + + procedure Rcheck_PE_Implicit_Return + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_24'Address); + end Rcheck_PE_Implicit_Return; + + procedure Rcheck_PE_Misaligned_Address_Value + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_25'Address); + end Rcheck_PE_Misaligned_Address_Value; + + procedure Rcheck_PE_Missing_Return + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_26'Address); + end Rcheck_PE_Missing_Return; + + procedure Rcheck_PE_Non_Transportable_Actual + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_31'Address); + end Rcheck_PE_Non_Transportable_Actual; + + procedure Rcheck_PE_Overlaid_Controlled_Object + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_27'Address); + end Rcheck_PE_Overlaid_Controlled_Object; + + procedure Rcheck_PE_Potentially_Blocking_Operation + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_28'Address); + end Rcheck_PE_Potentially_Blocking_Operation; + + procedure Rcheck_PE_Stream_Operation_Not_Allowed + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_36'Address); + end Rcheck_PE_Stream_Operation_Not_Allowed; + + procedure Rcheck_PE_Stubbed_Subprogram_Called + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_29'Address); + end Rcheck_PE_Stubbed_Subprogram_Called; + + procedure Rcheck_PE_Unchecked_Union_Restriction + (File : System.Address; Line : Integer) + is + begin + Raise_Program_Error_Msg (File, Line, Rmsg_30'Address); + end Rcheck_PE_Unchecked_Union_Restriction; + + procedure Rcheck_SE_Empty_Storage_Pool + (File : System.Address; Line : Integer) + is + begin + Raise_Storage_Error_Msg (File, Line, Rmsg_32'Address); + end Rcheck_SE_Empty_Storage_Pool; + + procedure Rcheck_SE_Explicit_Raise + (File : System.Address; Line : Integer) + is + begin + Raise_Storage_Error_Msg (File, Line, Rmsg_33'Address); + end Rcheck_SE_Explicit_Raise; + + procedure Rcheck_SE_Infinite_Recursion + (File : System.Address; Line : Integer) + is + begin + Raise_Storage_Error_Msg (File, Line, Rmsg_34'Address); + end Rcheck_SE_Infinite_Recursion; + + procedure Rcheck_SE_Object_Too_Large + (File : System.Address; Line : Integer) + is + begin + Raise_Storage_Error_Msg (File, Line, Rmsg_35'Address); + end Rcheck_SE_Object_Too_Large; + + procedure Rcheck_CE_Access_Check_Ext + (File : System.Address; Line, Column : Integer) + is + begin + Raise_Constraint_Error_Msg (File, Line, Column, Rmsg_00'Address); + end Rcheck_CE_Access_Check_Ext; + + procedure Rcheck_CE_Index_Check_Ext + (File : System.Address; Line, Column, Index, First, Last : Integer) + is + Msg : constant String := + Rmsg_05 (Rmsg_05'First .. Rmsg_05'Last - 1) & ASCII.LF + & "index " & Image (Index) & " not in " & Image (First) + & ".." & Image (Last) & ASCII.NUL; + begin + Raise_Constraint_Error_Msg (File, Line, Column, Msg'Address); + end Rcheck_CE_Index_Check_Ext; + + procedure Rcheck_CE_Invalid_Data_Ext + (File : System.Address; Line, Column, Index, First, Last : Integer) + is + Msg : constant String := + Rmsg_06 (Rmsg_06'First .. Rmsg_06'Last - 1) & ASCII.LF + & "value " & Image (Index) & " not in " & Image (First) + & ".." & Image (Last) & ASCII.NUL; + begin + Raise_Constraint_Error_Msg (File, Line, Column, Msg'Address); + end Rcheck_CE_Invalid_Data_Ext; + + procedure Rcheck_CE_Range_Check_Ext + (File : System.Address; Line, Column, Index, First, Last : Integer) + is + Msg : constant String := + Rmsg_12 (Rmsg_12'First .. Rmsg_12'Last - 1) & ASCII.LF + & "value " & Image (Index) & " not in " & Image (First) + & ".." & Image (Last) & ASCII.NUL; + begin + Raise_Constraint_Error_Msg (File, Line, Column, Msg'Address); + end Rcheck_CE_Range_Check_Ext; + + procedure Rcheck_PE_Finalize_Raised_Exception + (File : System.Address; Line : Integer) + is + X : constant EOA := Exception_Propagation.Allocate_Occurrence; + + begin + -- This is "finalize/adjust raised exception". This subprogram is always + -- called with abort deferred, unlike all other Rcheck_* subprograms, it + -- needs to call Raise_Exception_No_Defer. + + -- This is consistent with Raise_From_Controlled_Operation + + Exception_Data.Set_Exception_C_Msg + (X, Program_Error_Def'Access, File, Line, 0, Rmsg_23'Address); + Complete_And_Propagate_Occurrence (X); + end Rcheck_PE_Finalize_Raised_Exception; + + ------------- + -- Reraise -- + ------------- + + procedure Reraise is + Excep : constant EOA := Exception_Propagation.Allocate_Occurrence; + Saved_MO : constant System.Address := Excep.Machine_Occurrence; + + begin + if not ZCX_By_Default then + Abort_Defer.all; + end if; + + Save_Occurrence (Excep.all, Get_Current_Excep.all.all); + Excep.Machine_Occurrence := Saved_MO; + Complete_And_Propagate_Occurrence (Excep); + end Reraise; + + -------------------------------------- + -- Reraise_Library_Exception_If_Any -- + -------------------------------------- + + procedure Reraise_Library_Exception_If_Any is + LE : Exception_Occurrence; + + begin + if Library_Exception_Set then + LE := Library_Exception; + + if LE.Id = Null_Id then + Raise_Exception_No_Defer + (E => Program_Error'Identity, + Message => "finalize/adjust raised exception"); + else + Raise_From_Controlled_Operation (LE); + end if; + end if; + end Reraise_Library_Exception_If_Any; + + ------------------------ + -- Reraise_Occurrence -- + ------------------------ + + procedure Reraise_Occurrence (X : Exception_Occurrence) is + begin + if X.Id = null then + return; + else + Reraise_Occurrence_Always (X); + end if; + end Reraise_Occurrence; + + ------------------------------- + -- Reraise_Occurrence_Always -- + ------------------------------- + + procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is + begin + if not ZCX_By_Default then + Abort_Defer.all; + end if; + + Reraise_Occurrence_No_Defer (X); + end Reraise_Occurrence_Always; + + --------------------------------- + -- Reraise_Occurrence_No_Defer -- + --------------------------------- + + procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is + Excep : constant EOA := Exception_Propagation.Allocate_Occurrence; + Saved_MO : constant System.Address := Excep.Machine_Occurrence; + begin + Save_Occurrence (Excep.all, X); + Excep.Machine_Occurrence := Saved_MO; + Complete_And_Propagate_Occurrence (Excep); + end Reraise_Occurrence_No_Defer; + + --------------------- + -- Save_Occurrence -- + --------------------- + + procedure Save_Occurrence + (Target : out Exception_Occurrence; + Source : Exception_Occurrence) + is + begin + -- As the machine occurrence might be a data that must be finalized + -- (outside any Ada mechanism), do not copy it + + Target.Id := Source.Id; + Target.Machine_Occurrence := System.Null_Address; + Target.Msg_Length := Source.Msg_Length; + Target.Num_Tracebacks := Source.Num_Tracebacks; + Target.Pid := Source.Pid; + + Target.Msg (1 .. Target.Msg_Length) := + Source.Msg (1 .. Target.Msg_Length); + + Target.Tracebacks (1 .. Target.Num_Tracebacks) := + Source.Tracebacks (1 .. Target.Num_Tracebacks); + end Save_Occurrence; + + function Save_Occurrence (Source : Exception_Occurrence) return EOA is + Target : constant EOA := new Exception_Occurrence; + begin + Save_Occurrence (Target.all, Source); + return Target; + end Save_Occurrence; + + ------------------- + -- String_To_EId -- + ------------------- + + function String_To_EId (S : String) return Exception_Id + renames Stream_Attributes.String_To_EId; + + ------------------ + -- String_To_EO -- + ------------------ + + function String_To_EO (S : String) return Exception_Occurrence + renames Stream_Attributes.String_To_EO; + + --------------- + -- To_Stderr -- + --------------- + + procedure To_Stderr (C : Character) is + procedure Put_Char_Stderr (C : Character); + pragma Import (C, Put_Char_Stderr, "put_char_stderr"); + begin + Put_Char_Stderr (C); + end To_Stderr; + + procedure To_Stderr (S : String) is + begin + for J in S'Range loop + if S (J) /= ASCII.CR then + To_Stderr (S (J)); + end if; + end loop; + end To_Stderr; + + ------------------------- + -- Transfer_Occurrence -- + ------------------------- + + procedure Transfer_Occurrence + (Target : Exception_Occurrence_Access; + Source : Exception_Occurrence) + is + begin + Save_Occurrence (Target.all, Source); + end Transfer_Occurrence; + + ------------------------ + -- Triggered_By_Abort -- + ------------------------ + + function Triggered_By_Abort return Boolean is + Ex : constant Exception_Occurrence_Access := Get_Current_Excep.all; + begin + return Ex /= null + and then Exception_Identity (Ex.all) = Standard'Abort_Signal'Identity; + end Triggered_By_Abort; + + ------------------------- + -- Wide_Exception_Name -- + ------------------------- + + WC_Encoding : Character; + pragma Import (C, WC_Encoding, "__gl_wc_encoding"); + -- Encoding method for source, as exported by binder + + function Wide_Exception_Name + (Id : Exception_Id) return Wide_String + is + S : constant String := Exception_Name (Id); + W : Wide_String (1 .. S'Length); + L : Natural; + begin + String_To_Wide_String + (S, W, L, Get_WC_Encoding_Method (WC_Encoding)); + return W (1 .. L); + end Wide_Exception_Name; + + function Wide_Exception_Name + (X : Exception_Occurrence) return Wide_String + is + S : constant String := Exception_Name (X); + W : Wide_String (1 .. S'Length); + L : Natural; + begin + String_To_Wide_String + (S, W, L, Get_WC_Encoding_Method (WC_Encoding)); + return W (1 .. L); + end Wide_Exception_Name; + + ---------------------------- + -- Wide_Wide_Exception_Name -- + ----------------------------- + + function Wide_Wide_Exception_Name + (Id : Exception_Id) return Wide_Wide_String + is + S : constant String := Exception_Name (Id); + W : Wide_Wide_String (1 .. S'Length); + L : Natural; + begin + String_To_Wide_Wide_String + (S, W, L, Get_WC_Encoding_Method (WC_Encoding)); + return W (1 .. L); + end Wide_Wide_Exception_Name; + + function Wide_Wide_Exception_Name + (X : Exception_Occurrence) return Wide_Wide_String + is + S : constant String := Exception_Name (X); + W : Wide_Wide_String (1 .. S'Length); + L : Natural; + begin + String_To_Wide_Wide_String + (S, W, L, Get_WC_Encoding_Method (WC_Encoding)); + return W (1 .. L); + end Wide_Wide_Exception_Name; + + -------------------------- + -- Code_Address_For_ZZZ -- + -------------------------- + + -- This function gives us the end of the PC range for addresses + -- within the exception unit itself. We hope that gigi/gcc keeps all the + -- procedures in their original order. + + function Code_Address_For_ZZZ return System.Address is + begin + <<Start_Of_ZZZ>> + return Start_Of_ZZZ'Address; + end Code_Address_For_ZZZ; + +end Ada.Exceptions; |