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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- A D A . E X C E P T I O N S -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2011, 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. -- -- -- ------------------------------------------------------------------------------ -- This version of Ada.Exceptions is a full Ada 95 version, and Ada 2005 -- features such as the additional definitions of Exception_Name returning -- Wide_[Wide_]String. -- It is used for building the compiler and the basic tools, since these -- builds may be done with bootstrap compilers that cannot handle these -- additions. The full version of Ada.Exceptions can be found in the files -- a-except-2005.ads/adb, and is used for all other builds where full Ada -- 2005 functionality is required. In particular, it is used for building -- run times on all targets. pragma Compiler_Unit; 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_Debug; use System.Exceptions_Debug; with System.Standard_Library; use System.Standard_Library; with System.Soft_Links; use System.Soft_Links; 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. procedure Process_Raise_Exception (E : Exception_Id); pragma No_Return (Process_Raise_Exception); -- This is the lowest level raise routine. It raises the exception -- referenced by Current_Excep.all in the TSD, without deferring abort -- (the caller must ensure that abort is deferred on entry). 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 messages routines -- --------------------------------- procedure Set_Exception_C_Msg (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 the -- Current_Excep field in the TSD 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 (Id : Exception_Id; Message : String); -- This routine is called to setup the exception referenced by the -- Current_Excep field in the TSD to contain the indicated Id value and -- message. Message is a string which is generated as the exception -- message. -------------------------------------- -- Exception information subprogram -- -------------------------------------- function Exception_Information (X : Exception_Occurrence) return String; -- The format of the exception information is as follows: -- -- Exception_Name: <exception name> (as in Exception_Name) -- Message: <message> (only if Exception_Message is empty) -- PID=nnnn (only if != 0) -- 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. It -- is present only -- -- 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. --------------------------------------- -- Exception backtracing subprograms -- --------------------------------------- -- What is automatically output when exception tracing is on is the -- usual exception information with the call chain backtrace possibly -- tailored by a backtrace decorator. Modifying Exception_Information -- itself is not a good idea because the decorated output is completely -- out of control and would break all our code related to the streaming -- of exceptions. We then provide an alternative function to compute -- the possibly tailored output, which is equivalent if no decorator is -- currently set: function Tailored_Exception_Information (X : Exception_Occurrence) return String; -- Exception information to be output in the case of automatic tracing -- requested through GNAT.Exception_Traces. -- -- This is the same as Exception_Information if no backtrace decorator -- is currently in place. Otherwise, this is Exception_Information with -- the call chain raw addresses replaced by the result of a call to the -- current decorator provided with the call chain addresses. pragma Export (Ada, Tailored_Exception_Information, "__gnat_tailored_exception_information"); -- This is currently used by System.Tasking.Stages end Exception_Data; package Exception_Traces is use Exception_Data; -- Imports Tailored_Exception_Information ---------------------------------------------- -- Run-Time Exception Notification Routines -- ---------------------------------------------- -- 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; 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; 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; pragma No_Return (Unhandled_Exception_Terminate); -- This procedure is called to terminate program 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 Stream_Attributes is -------------------------------- -- Stream attributes routines -- -------------------------------- 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 Raise_Current_Excep (E : Exception_Id); pragma No_Return (Raise_Current_Excep); pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg"); -- This is a simple wrapper to Process_Raise_Exception. -- -- This external name for Raise_Current_Excep is historical, and probably -- should be changed but for now we keep it, because gdb and gigi know -- about it. 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; 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 string message M is appended to this -- if M is not null. 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; 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 + 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) -- | | | -- Raise_Current_Excep 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. procedure Transfer_Occurrence (Target : Exception_Occurrence_Access; Source : Exception_Occurrence); pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence"); -- Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous -- 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 Routines -- ----------------------------- -- Routines to a specific exception with a reason message attached. The -- parameters are the file name and line number in each case. The names are -- keyed to the codes defined in types.ads and a-types.h (for example, the -- name Rcheck_05 refers to the Reason RT_Exception_Code'Val (5)). procedure Rcheck_00 (File : System.Address; Line : Integer); procedure Rcheck_01 (File : System.Address; Line : Integer); procedure Rcheck_02 (File : System.Address; Line : Integer); procedure Rcheck_03 (File : System.Address; Line : Integer); procedure Rcheck_04 (File : System.Address; Line : Integer); procedure Rcheck_05 (File : System.Address; Line : Integer); procedure Rcheck_06 (File : System.Address; Line : Integer); procedure Rcheck_07 (File : System.Address; Line : Integer); procedure Rcheck_08 (File : System.Address; Line : Integer); procedure Rcheck_09 (File : System.Address; Line : Integer); procedure Rcheck_10 (File : System.Address; Line : Integer); procedure Rcheck_11 (File : System.Address; Line : Integer); procedure Rcheck_12 (File : System.Address; Line : Integer); procedure Rcheck_13 (File : System.Address; Line : Integer); procedure Rcheck_14 (File : System.Address; Line : Integer); procedure Rcheck_15 (File : System.Address; Line : Integer); procedure Rcheck_16 (File : System.Address; Line : Integer); procedure Rcheck_17 (File : System.Address; Line : Integer); procedure Rcheck_18 (File : System.Address; Line : Integer); procedure Rcheck_19 (File : System.Address; Line : Integer); procedure Rcheck_20 (File : System.Address; Line : Integer); procedure Rcheck_21 (File : System.Address; Line : Integer); procedure Rcheck_23 (File : System.Address; Line : Integer); procedure Rcheck_24 (File : System.Address; Line : Integer); procedure Rcheck_25 (File : System.Address; Line : Integer); procedure Rcheck_26 (File : System.Address; Line : Integer); procedure Rcheck_27 (File : System.Address; Line : Integer); procedure Rcheck_28 (File : System.Address; Line : Integer); procedure Rcheck_29 (File : System.Address; Line : Integer); procedure Rcheck_30 (File : System.Address; Line : Integer); procedure Rcheck_31 (File : System.Address; Line : Integer); procedure Rcheck_32 (File : System.Address; Line : Integer); procedure Rcheck_33 (File : System.Address; Line : Integer); procedure Rcheck_34 (File : System.Address; Line : Integer); procedure Rcheck_22 (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_* routines, it needs to call Raise_Exception_No_Defer. -- -- It should probably have a distinguished name ??? pragma Export (C, Rcheck_00, "__gnat_rcheck_00"); pragma Export (C, Rcheck_01, "__gnat_rcheck_01"); pragma Export (C, Rcheck_02, "__gnat_rcheck_02"); pragma Export (C, Rcheck_03, "__gnat_rcheck_03"); pragma Export (C, Rcheck_04, "__gnat_rcheck_04"); pragma Export (C, Rcheck_05, "__gnat_rcheck_05"); pragma Export (C, Rcheck_06, "__gnat_rcheck_06"); pragma Export (C, Rcheck_07, "__gnat_rcheck_07"); pragma Export (C, Rcheck_08, "__gnat_rcheck_08"); pragma Export (C, Rcheck_09, "__gnat_rcheck_09"); pragma Export (C, Rcheck_10, "__gnat_rcheck_10"); pragma Export (C, Rcheck_11, "__gnat_rcheck_11"); pragma Export (C, Rcheck_12, "__gnat_rcheck_12"); pragma Export (C, Rcheck_13, "__gnat_rcheck_13"); pragma Export (C, Rcheck_14, "__gnat_rcheck_14"); pragma Export (C, Rcheck_15, "__gnat_rcheck_15"); pragma Export (C, Rcheck_16, "__gnat_rcheck_16"); pragma Export (C, Rcheck_17, "__gnat_rcheck_17"); pragma Export (C, Rcheck_18, "__gnat_rcheck_18"); pragma Export (C, Rcheck_19, "__gnat_rcheck_19"); pragma Export (C, Rcheck_20, "__gnat_rcheck_20"); pragma Export (C, Rcheck_21, "__gnat_rcheck_21"); pragma Export (C, Rcheck_22, "__gnat_rcheck_22"); pragma Export (C, Rcheck_23, "__gnat_rcheck_23"); pragma Export (C, Rcheck_24, "__gnat_rcheck_24"); pragma Export (C, Rcheck_25, "__gnat_rcheck_25"); pragma Export (C, Rcheck_26, "__gnat_rcheck_26"); pragma Export (C, Rcheck_27, "__gnat_rcheck_27"); pragma Export (C, Rcheck_28, "__gnat_rcheck_28"); pragma Export (C, Rcheck_29, "__gnat_rcheck_29"); pragma Export (C, Rcheck_30, "__gnat_rcheck_30"); pragma Export (C, Rcheck_31, "__gnat_rcheck_31"); pragma Export (C, Rcheck_32, "__gnat_rcheck_32"); pragma Export (C, Rcheck_33, "__gnat_rcheck_33"); pragma Export (C, Rcheck_34, "__gnat_rcheck_34"); -- 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 epilog stuff, can be eliminated). pragma No_Return (Rcheck_00); pragma No_Return (Rcheck_01); pragma No_Return (Rcheck_02); pragma No_Return (Rcheck_03); pragma No_Return (Rcheck_04); pragma No_Return (Rcheck_05); pragma No_Return (Rcheck_06); pragma No_Return (Rcheck_07); pragma No_Return (Rcheck_08); pragma No_Return (Rcheck_09); pragma No_Return (Rcheck_10); pragma No_Return (Rcheck_11); pragma No_Return (Rcheck_12); pragma No_Return (Rcheck_13); pragma No_Return (Rcheck_14); pragma No_Return (Rcheck_15); pragma No_Return (Rcheck_16); pragma No_Return (Rcheck_17); pragma No_Return (Rcheck_18); pragma No_Return (Rcheck_19); pragma No_Return (Rcheck_20); pragma No_Return (Rcheck_21); pragma No_Return (Rcheck_22); pragma No_Return (Rcheck_23); pragma No_Return (Rcheck_24); pragma No_Return (Rcheck_25); pragma No_Return (Rcheck_26); pragma No_Return (Rcheck_27); pragma No_Return (Rcheck_28); pragma No_Return (Rcheck_29); pragma No_Return (Rcheck_30); pragma No_Return (Rcheck_32); pragma No_Return (Rcheck_33); pragma No_Return (Rcheck_34); --------------------------------------------- -- 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 := "all guards closed" & NUL; Rmsg_18 : constant String := "improper use of generic subtype" & " with predicate" & NUL; Rmsg_19 : constant String := "Current_Task referenced in entry" & " body" & NUL; Rmsg_20 : constant String := "duplicated entry address" & NUL; Rmsg_21 : constant String := "explicit raise" & NUL; Rmsg_22 : constant String := "finalize/adjust raised exception" & NUL; Rmsg_23 : constant String := "implicit return with No_Return" & NUL; Rmsg_24 : constant String := "misaligned address value" & NUL; Rmsg_25 : constant String := "missing return" & NUL; Rmsg_26 : constant String := "overlaid controlled object" & NUL; Rmsg_27 : constant String := "potentially blocking operation" & NUL; Rmsg_28 : constant String := "stubbed subprogram called" & NUL; Rmsg_29 : constant String := "unchecked union restriction" & NUL; Rmsg_30 : constant String := "actual/returned class-wide" & " value not transportable" & NUL; Rmsg_31 : constant String := "empty storage pool" & NUL; Rmsg_32 : constant String := "explicit raise" & NUL; Rmsg_33 : constant String := "infinite recursion" & NUL; Rmsg_34 : constant String := "object too large" & 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. ------------------------------ -- Current_Target_Exception -- ------------------------------ function Current_Target_Exception return Exception_Occurrence is begin return Null_Occurrence; end Current_Target_Exception; ------------------- -- 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 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; end if; return Exception_Data.Exception_Information (X); end Exception_Information; ----------------------- -- Exception_Message -- ----------------------- function Exception_Message (X : Exception_Occurrence) return String is begin if X.Id = Null_Id then raise Constraint_Error; end if; return X.Msg (1 .. X.Msg_Length); end Exception_Message; -------------------- -- Exception_Name -- -------------------- function Exception_Name (Id : Exception_Id) return String is begin if Id = null then raise Constraint_Error; end if; return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1); 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_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. ----------------------- -- 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. ----------------------------- -- Process_Raise_Exception -- ----------------------------- procedure Process_Raise_Exception (E : Exception_Id) is pragma Inspection_Point (E); -- This is so the debugger can reliably inspect the parameter Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all; Excep : constant EOA := Get_Current_Excep.all; procedure builtin_longjmp (buffer : Address; Flag : Integer); pragma No_Return (builtin_longjmp); pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp"); begin -- WARNING: There should be no exception handler for this body because -- this would cause gigi to prepend a setup for a new jmpbuf to the -- sequence of statements in case of built-in sjljl. We would then -- always get this new buf in Jumpbuf_Ptr instead of the one for the -- exception we are handling, which would completely break the whole -- design of this procedure. -- If the jump buffer pointer is non-null, transfer control using it. -- Otherwise announce an unhandled exception (note that this means that -- we have no finalizations to do other than at the outer level). -- Perform the necessary notification tasks in both cases. if Jumpbuf_Ptr /= Null_Address then if not Excep.Exception_Raised then Excep.Exception_Raised := True; Exception_Traces.Notify_Handled_Exception; end if; builtin_longjmp (Jumpbuf_Ptr, 1); else Exception_Traces.Notify_Unhandled_Exception; Exception_Traces.Unhandled_Exception_Terminate; end if; end Process_Raise_Exception; ---------------------------- -- 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; Msg : System.Address) is begin Raise_With_Location_And_Msg (Constraint_Error_Def'Access, File, Line, Msg); end Raise_Constraint_Error_Msg; ------------------------- -- Raise_Current_Excep -- ------------------------- procedure Raise_Current_Excep (E : Exception_Id) is pragma Inspection_Point (E); -- This is so the debugger can reliably inspect the parameter when -- inserting a breakpoint at the start of this procedure. Id : Exception_Id := E; pragma Volatile (Id); pragma Warnings (Off, Id); -- In order to provide support for breakpoints on unhandled exceptions, -- the debugger will also need to be able to inspect the value of E from -- another (inner) frame. So we need to make sure that if E is passed in -- a register, its value is also spilled on stack. For this, we store -- the parameter value in a local variable, and add a pragma Volatile to -- make sure it is spilled. The pragma Warnings (Off) is needed because -- the compiler knows that Id is not referenced and that this use of -- pragma Volatile is peculiar! begin Debug_Raise_Exception (E => SSL.Exception_Data_Ptr (E)); Process_Raise_Exception (E); end Raise_Current_Excep; --------------------- -- 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 Exception_Data.Set_Exception_Msg (EF, Message); Abort_Defer.all; Raise_Current_Excep (EF); end Raise_Exception; ---------------------------- -- Raise_Exception_Always -- ---------------------------- procedure Raise_Exception_Always (E : Exception_Id; Message : String := "") is begin Exception_Data.Set_Exception_Msg (E, Message); Abort_Defer.all; Raise_Current_Excep (E); end Raise_Exception_Always; ------------------------------ -- Raise_Exception_No_Defer -- ------------------------------ procedure Raise_Exception_No_Defer (E : Exception_Id; Message : String := "") is begin Exception_Data.Set_Exception_Msg (E, Message); -- Do not call Abort_Defer.all, as specified by the spec Raise_Current_Excep (E); 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 proper prefix, just re-reraise 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; ------------------------------- -- Raise_From_Signal_Handler -- ------------------------------- procedure Raise_From_Signal_Handler (E : Exception_Id; M : System.Address) is begin Exception_Data.Set_Exception_C_Msg (E, M); Abort_Defer.all; Process_Raise_Exception (E); 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, 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, 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; M : System.Address := System.Null_Address) is begin Exception_Data.Set_Exception_C_Msg (E, F, L, Msg2 => M); Abort_Defer.all; Raise_Current_Excep (E); end Raise_With_Location_And_Msg; -------------------- -- Raise_With_Msg -- -------------------- procedure Raise_With_Msg (E : Exception_Id) is Excep : constant EOA := Get_Current_Excep.all; begin Excep.Exception_Raised := False; Excep.Id := E; Excep.Num_Tracebacks := 0; Excep.Pid := Local_Partition_ID; Abort_Defer.all; Raise_Current_Excep (E); end Raise_With_Msg; -------------------------------------- -- Calls to Run-Time Check Routines -- -------------------------------------- procedure Rcheck_00 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_00'Address); end Rcheck_00; procedure Rcheck_01 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_01'Address); end Rcheck_01; procedure Rcheck_02 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_02'Address); end Rcheck_02; procedure Rcheck_03 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_03'Address); end Rcheck_03; procedure Rcheck_04 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_04'Address); end Rcheck_04; procedure Rcheck_05 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_05'Address); end Rcheck_05; procedure Rcheck_06 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_06'Address); end Rcheck_06; procedure Rcheck_07 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_07'Address); end Rcheck_07; procedure Rcheck_08 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_08'Address); end Rcheck_08; procedure Rcheck_09 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_09'Address); end Rcheck_09; procedure Rcheck_10 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_10'Address); end Rcheck_10; procedure Rcheck_11 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_11'Address); end Rcheck_11; procedure Rcheck_12 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_12'Address); end Rcheck_12; procedure Rcheck_13 (File : System.Address; Line : Integer) is begin Raise_Constraint_Error_Msg (File, Line, Rmsg_13'Address); end Rcheck_13; procedure Rcheck_14 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_14'Address); end Rcheck_14; procedure Rcheck_15 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_15'Address); end Rcheck_15; procedure Rcheck_16 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_16'Address); end Rcheck_16; procedure Rcheck_17 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_17'Address); end Rcheck_17; procedure Rcheck_18 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_18'Address); end Rcheck_18; procedure Rcheck_19 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_19'Address); end Rcheck_19; procedure Rcheck_20 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_20'Address); end Rcheck_20; procedure Rcheck_21 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_21'Address); end Rcheck_21; procedure Rcheck_22 (File : System.Address; Line : Integer) is E : constant Exception_Id := Program_Error_Def'Access; begin -- This is "finalize/adjust raised exception". This subprogram is always -- called with abort deferred, unlike all other Rcheck_* routines, it -- needs to call Raise_Exception_No_Defer. -- This is consistent with Raise_From_Controlled_Operation Exception_Data.Set_Exception_C_Msg (E, File, Line, 0, Rmsg_22'Address); Raise_Current_Excep (E); end Rcheck_22; procedure Rcheck_23 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_23'Address); end Rcheck_23; procedure Rcheck_24 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_24'Address); end Rcheck_24; procedure Rcheck_25 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_25'Address); end Rcheck_25; procedure Rcheck_26 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_26'Address); end Rcheck_26; procedure Rcheck_27 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_27'Address); end Rcheck_27; procedure Rcheck_28 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_28'Address); end Rcheck_28; procedure Rcheck_29 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_29'Address); end Rcheck_29; procedure Rcheck_30 (File : System.Address; Line : Integer) is begin Raise_Program_Error_Msg (File, Line, Rmsg_30'Address); end Rcheck_30; procedure Rcheck_31 (File : System.Address; Line : Integer) is begin Raise_Storage_Error_Msg (File, Line, Rmsg_31'Address); end Rcheck_31; procedure Rcheck_32 (File : System.Address; Line : Integer) is begin Raise_Storage_Error_Msg (File, Line, Rmsg_32'Address); end Rcheck_32; procedure Rcheck_33 (File : System.Address; Line : Integer) is begin Raise_Storage_Error_Msg (File, Line, Rmsg_33'Address); end Rcheck_33; procedure Rcheck_34 (File : System.Address; Line : Integer) is begin Raise_Storage_Error_Msg (File, Line, Rmsg_34'Address); end Rcheck_34; ------------- -- Reraise -- ------------- procedure Reraise is Excep : constant EOA := Get_Current_Excep.all; begin Abort_Defer.all; Raise_Current_Excep (Excep.Id); end Reraise; ------------------------ -- Reraise_Occurrence -- ------------------------ procedure Reraise_Occurrence (X : Exception_Occurrence) is begin if X.Id /= null then Abort_Defer.all; Save_Occurrence (Get_Current_Excep.all.all, X); Raise_Current_Excep (X.Id); end if; end Reraise_Occurrence; ------------------------------- -- Reraise_Occurrence_Always -- ------------------------------- procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is begin Abort_Defer.all; Save_Occurrence (Get_Current_Excep.all.all, X); Raise_Current_Excep (X.Id); end Reraise_Occurrence_Always; --------------------------------- -- Reraise_Occurrence_No_Defer -- --------------------------------- procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is begin Save_Occurrence (Get_Current_Excep.all.all, X); Raise_Current_Excep (X.Id); end Reraise_Occurrence_No_Defer; --------------------- -- Save_Occurrence -- --------------------- procedure Save_Occurrence (Target : out Exception_Occurrence; Source : Exception_Occurrence) is begin Target.Id := Source.Id; 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 type int is new Integer; procedure put_char_stderr (C : int); pragma Import (C, put_char_stderr, "put_char_stderr"); begin put_char_stderr (Character'Pos (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; end Ada.Exceptions;
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