gcc/ada/a-except.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                       A D A . E X C E P T I O N S                        --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This version of Ada.Exceptions is a full Ada 95 version, and Ada 2005
  35 --  features such as the additional definitions of Exception_Name returning
  36 --  Wide_[Wide_]String.
  37
  38 --  It is used for building the compiler and the basic tools, since these
  39 --  builds may be done with bootstrap compilers that cannot handle these
  40 --  additions. The full version of Ada.Exceptions can be found in the files
  41 --  a-except-2005.ads/adb, and is used for all other builds where full Ada
  42 --  2005 functionality is required. in particular, it is used for building
  43 --  run times on all targets.
  44
  45 pragma Warnings (Off);
  46 pragma Compiler_Unit;
  47 pragma Warnings (On);
  48
  49 pragma Style_Checks (All_Checks);
  50 --  No subprogram ordering check, due to logical grouping
  51
  52 pragma Polling (Off);
  53 --  We must turn polling off for this unit, because otherwise we get
  54 --  elaboration circularities with System.Exception_Tables.
  55
  56 with System;                  use System;
  57 with System.Exceptions;       use System.Exceptions;
  58 with System.Standard_Library; use System.Standard_Library;
  59 with System.Soft_Links;       use System.Soft_Links;
  60
  61 package body Ada.Exceptions is
  62
  63    pragma Suppress (All_Checks);
  64    --  We definitely do not want exceptions occurring within this unit, or
  65    --  we are in big trouble. If an exceptional situation does occur, better
  66    --  that it not be raised, since raising it can cause confusing chaos.
  67
  68    -----------------------
  69    -- Local Subprograms --
  70    -----------------------
  71
  72    --  Note: the exported subprograms in this package body are called directly
  73    --  from C clients using the given external name, even though they are not
  74    --  technically visible in the Ada sense.
  75
  76    procedure Process_Raise_Exception (E : Exception_Id);
  77    pragma No_Return (Process_Raise_Exception);
  78    --  This is the lowest level raise routine. It raises the exception
  79    --  referenced by Current_Excep.all in the TSD, without deferring abort
  80    --  (the caller must ensure that abort is deferred on entry).
  81
  82    procedure To_Stderr (S : String);
  83    pragma Export (Ada, To_Stderr, "__gnat_to_stderr");
  84    --  Little routine to output string to stderr that is also used
  85    --  in the tasking run time.
  86
  87    procedure To_Stderr (C : Character);
  88    pragma Inline (To_Stderr);
  89    pragma Export (Ada, To_Stderr, "__gnat_to_stderr_char");
  90    --  Little routine to output a character to stderr, used by some of
  91    --  the separate units below.
  92
  93    package Exception_Data is
  94
  95       ---------------------------------
  96       -- Exception messages routines --
  97       ---------------------------------
  98
  99       procedure Set_Exception_C_Msg
 100         (Id   : Exception_Id;
 101          Msg1 : System.Address;
 102          Line : Integer        := 0;
 103          Msg2 : System.Address := System.Null_Address);
 104       --  This routine is called to setup the exception referenced by the
 105       --  Current_Excep field in the TSD to contain the indicated Id value
 106       --  and message. Msg1 is a null terminated string which is generated
 107       --  as the exception message. If line is non-zero, then a colon and
 108       --  the decimal representation of this integer is appended to the
 109       --  message. When Msg2 is non-null, a space and this additional null
 110       --  terminated string is added to the message.
 111
 112       procedure Set_Exception_Msg
 113         (Id      : Exception_Id;
 114          Message : String);
 115       --  This routine is called to setup the exception referenced by the
 116       --  Current_Excep field in the TSD to contain the indicated Id value
 117       --  and message. Message is a string which is generated as the
 118       --  exception message.
 119
 120       --------------------------------------
 121       -- Exception information subprogram --
 122       --------------------------------------
 123
 124       function Exception_Information (X : Exception_Occurrence) return String;
 125       --  The format of the exception information is as follows:
 126       --
 127       --    Exception_Name: <exception name> (as in Exception_Name)
 128       --    Message: <message> (only if Exception_Message is empty)
 129       --    PID=nnnn (only if != 0)
 130       --    Call stack traceback locations:  (only if at least one location)
 131       --    <0xyyyyyyyy 0xyyyyyyyy ...>      (is recorded)
 132       --
 133       --  The lines are separated by a ASCII.LF character.
 134       --  The nnnn is the partition Id given as decimal digits.
 135       --  The 0x... line represents traceback program counter locations, in
 136       --  execution order with the first one being the exception location. It
 137       --  is present only
 138       --
 139       --  The Exception_Name and Message lines are omitted in the abort
 140       --  signal case, since this is not really an exception.
 141
 142       --  !! If the format of the generated string is changed, please note
 143       --  !! that an equivalent modification to the routine String_To_EO must
 144       --  !! be made to preserve proper functioning of the stream attributes.
 145
 146       ---------------------------------------
 147       -- Exception backtracing subprograms --
 148       ---------------------------------------
 149
 150       --  What is automatically output when exception tracing is on is the
 151       --  usual exception information with the call chain backtrace possibly
 152       --  tailored by a backtrace decorator. Modifying Exception_Information
 153       --  itself is not a good idea because the decorated output is completely
 154       --  out of control and would break all our code related to the streaming
 155       --  of exceptions.  We then provide an alternative function to compute
 156       --  the possibly tailored output, which is equivalent if no decorator is
 157       --  currently set:
 158
 159       function Tailored_Exception_Information
 160         (X : Exception_Occurrence) return String;
 161       --  Exception information to be output in the case of automatic tracing
 162       --  requested through GNAT.Exception_Traces.
 163       --
 164       --  This is the same as Exception_Information if no backtrace decorator
 165       --  is currently in place. Otherwise, this is Exception_Information with
 166       --  the call chain raw addresses replaced by the result of a call to the
 167       --  current decorator provided with the call chain addresses.
 168
 169       pragma Export
 170         (Ada, Tailored_Exception_Information,
 171            "__gnat_tailored_exception_information");
 172       --  This is currently used by System.Tasking.Stages
 173
 174    end Exception_Data;
 175
 176    package Exception_Traces is
 177
 178       use Exception_Data;
 179       --  Imports Tailored_Exception_Information
 180
 181       ----------------------------------------------
 182       -- Run-Time Exception Notification Routines --
 183       ----------------------------------------------
 184
 185       --  These subprograms provide a common run-time interface to trigger the
 186       --  actions required when an exception is about to be propagated (e.g.
 187       --  user specified actions or output of exception information). They are
 188       --  exported to be usable by the Ada exception handling personality
 189       --  routine when the GCC 3 mechanism is used.
 190
 191       procedure Notify_Handled_Exception;
 192       pragma Export
 193         (C, Notify_Handled_Exception, "__gnat_notify_handled_exception");
 194       --  This routine is called for a handled occurrence is about to be
 195       --  propagated.
 196
 197       procedure Notify_Unhandled_Exception;
 198       pragma Export
 199         (C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception");
 200       --  This routine is called when an unhandled occurrence is about to be
 201       --  propagated.
 202
 203       procedure Unhandled_Exception_Terminate;
 204       pragma No_Return (Unhandled_Exception_Terminate);
 205       --  This procedure is called to terminate execution following an
 206       --  unhandled exception. The exception information, including
 207       --  traceback if available is output, and execution is then
 208       --  terminated. Note that at the point where this routine is
 209       --  called, the stack has typically been destroyed.
 210
 211    end Exception_Traces;
 212
 213    package Exception_Propagation is
 214
 215       procedure Setup_Exception
 216         (Excep    : EOA;
 217          Current  : EOA;
 218          Reraised : Boolean := False);
 219       --  Dummy routine used to share a-exexda.adb, do nothing
 220
 221    end Exception_Propagation;
 222
 223    package Stream_Attributes is
 224
 225       --------------------------------
 226       -- Stream attributes routines --
 227       --------------------------------
 228
 229       function EId_To_String (X : Exception_Id) return String;
 230       function String_To_EId (S : String) return Exception_Id;
 231       --  Functions for implementing Exception_Id stream attributes
 232
 233       function EO_To_String (X : Exception_Occurrence) return String;
 234       function String_To_EO (S : String) return Exception_Occurrence;
 235       --  Functions for implementing Exception_Occurrence stream
 236       --  attributes
 237
 238    end Stream_Attributes;
 239
 240    procedure Raise_Current_Excep (E : Exception_Id);
 241    pragma No_Return (Raise_Current_Excep);
 242    pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg");
 243    --  This is a simple wrapper to Process_Raise_Exception.
 244    --
 245    --  This external name for Raise_Current_Excep is historical, and probably
 246    --  should be changed but for now we keep it, because gdb and gigi know
 247    --  about it.
 248
 249    procedure Raise_Exception_No_Defer
 250       (E : Exception_Id; Message : String := "");
 251    pragma Export
 252     (Ada, Raise_Exception_No_Defer,
 253      "ada__exceptions__raise_exception_no_defer");
 254    pragma No_Return (Raise_Exception_No_Defer);
 255    --  Similar to Raise_Exception, but with no abort deferral
 256
 257    procedure Raise_With_Msg (E : Exception_Id);
 258    pragma No_Return (Raise_With_Msg);
 259    pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg");
 260    --  Raises an exception with given exception id value. A message
 261    --  is associated with the raise, and has already been stored in the
 262    --  exception occurrence referenced by the Current_Excep in the TSD.
 263    --  Abort is deferred before the raise call.
 264
 265    procedure Raise_With_Location_And_Msg
 266      (E : Exception_Id;
 267       F : System.Address;
 268       L : Integer;
 269       M : System.Address := System.Null_Address);
 270    pragma No_Return (Raise_With_Location_And_Msg);
 271    --  Raise an exception with given exception id value. A filename and line
 272    --  number is associated with the raise and is stored in the exception
 273    --  occurrence and in addition a string message M is appended to
 274    --  this (if M is not null).
 275
 276    procedure Raise_Constraint_Error
 277      (File : System.Address;
 278       Line : Integer);
 279    pragma No_Return (Raise_Constraint_Error);
 280    pragma Export
 281      (C, Raise_Constraint_Error, "__gnat_raise_constraint_error");
 282    --  Raise constraint error with file:line information
 283
 284    procedure Raise_Constraint_Error_Msg
 285      (File : System.Address;
 286       Line : Integer;
 287       Msg  : System.Address);
 288    pragma No_Return (Raise_Constraint_Error_Msg);
 289    pragma Export
 290      (C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg");
 291    --  Raise constraint error with file:line + msg information
 292
 293    procedure Raise_Program_Error
 294      (File : System.Address;
 295       Line : Integer);
 296    pragma No_Return (Raise_Program_Error);
 297    pragma Export
 298      (C, Raise_Program_Error, "__gnat_raise_program_error");
 299    --  Raise program error with file:line information
 300
 301    procedure Raise_Program_Error_Msg
 302      (File : System.Address;
 303       Line : Integer;
 304       Msg  : System.Address);
 305    pragma No_Return (Raise_Program_Error_Msg);
 306    pragma Export
 307      (C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg");
 308    --  Raise program error with file:line + msg information
 309
 310    procedure Raise_Storage_Error
 311      (File : System.Address;
 312       Line : Integer);
 313    pragma No_Return (Raise_Storage_Error);
 314    pragma Export
 315      (C, Raise_Storage_Error, "__gnat_raise_storage_error");
 316    --  Raise storage error with file:line information
 317
 318    procedure Raise_Storage_Error_Msg
 319      (File : System.Address;
 320       Line : Integer;
 321       Msg  : System.Address);
 322    pragma No_Return (Raise_Storage_Error_Msg);
 323    pragma Export
 324      (C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg");
 325    --  Raise storage error with file:line + reason msg information
 326
 327    --  The exception raising process and the automatic tracing mechanism rely
 328    --  on some careful use of flags attached to the exception occurrence. The
 329    --  graph below illustrates the relations between the Raise_ subprograms
 330    --  and identifies the points where basic flags such as Exception_Raised
 331    --  are initialized.
 332    --
 333    --  (i) signs indicate the flags initialization points. R stands for Raise,
 334    --  W for With, and E for Exception.
 335    --
 336    --                   R_No_Msg    R_E   R_Pe  R_Ce  R_Se
 337    --                       |        |     |     |     |
 338    --                       +--+  +--+     +---+ | +---+
 339    --                          |  |            | | |
 340    --     R_E_No_Defer(i)    R_W_Msg(i)       R_W_Loc
 341    --           |               |              |   |
 342    --           +------------+  |  +-----------+   +--+
 343    --                        |  |  |                  |
 344    --                        |  |  |             Set_E_C_Msg(i)
 345    --                        |  |  |
 346    --                   Raise_Current_Excep
 347
 348    procedure Reraise;
 349    pragma No_Return (Reraise);
 350    pragma Export (C, Reraise, "__gnat_reraise");
 351    --  Reraises the exception referenced by the Current_Excep field of
 352    --  the TSD (all fields of this exception occurrence are set). Abort
 353    --  is deferred before the reraise operation.
 354
 355    --  Save_Occurrence variations: As the management of the private data
 356    --  attached to occurrences is delicate, wether or not pointers to such
 357    --  data has to be copied in various situations is better made explicit.
 358    --  The following procedures provide an internal interface to help making
 359    --  this explicit.
 360
 361    procedure Save_Occurrence_No_Private
 362      (Target : out Exception_Occurrence;
 363       Source : Exception_Occurrence);
 364    --  Copy all the components of Source to Target, except the
 365    --  Private_Data pointer.
 366
 367    procedure Transfer_Occurrence
 368      (Target : Exception_Occurrence_Access;
 369       Source : Exception_Occurrence);
 370    pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence");
 371    --  Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous
 372    --  to setup Target from Source as an exception to be propagated in the
 373    --  caller task. Target is expected to be a pointer to the fixed TSD
 374    --  occurrence for this task.
 375
 376    -----------------------------
 377    -- Run-Time Check Routines --
 378    -----------------------------
 379
 380    --  These routines are called from the runtime to raise a specific
 381    --  exception with a reason message attached. The parameters are
 382    --  the file name and line number in each case. The names are keyed
 383    --  to the codes defined in Types.ads and a-types.h (for example,
 384    --  the name Rcheck_05 refers to the Reason whose Pos code is 5).
 385
 386    procedure Rcheck_00 (File : System.Address; Line : Integer);
 387    procedure Rcheck_01 (File : System.Address; Line : Integer);
 388    procedure Rcheck_02 (File : System.Address; Line : Integer);
 389    procedure Rcheck_03 (File : System.Address; Line : Integer);
 390    procedure Rcheck_04 (File : System.Address; Line : Integer);
 391    procedure Rcheck_05 (File : System.Address; Line : Integer);
 392    procedure Rcheck_06 (File : System.Address; Line : Integer);
 393    procedure Rcheck_07 (File : System.Address; Line : Integer);
 394    procedure Rcheck_08 (File : System.Address; Line : Integer);
 395    procedure Rcheck_09 (File : System.Address; Line : Integer);
 396    procedure Rcheck_10 (File : System.Address; Line : Integer);
 397    procedure Rcheck_11 (File : System.Address; Line : Integer);
 398    procedure Rcheck_12 (File : System.Address; Line : Integer);
 399    procedure Rcheck_13 (File : System.Address; Line : Integer);
 400    procedure Rcheck_14 (File : System.Address; Line : Integer);
 401    procedure Rcheck_15 (File : System.Address; Line : Integer);
 402    procedure Rcheck_16 (File : System.Address; Line : Integer);
 403    procedure Rcheck_17 (File : System.Address; Line : Integer);
 404    procedure Rcheck_18 (File : System.Address; Line : Integer);
 405    procedure Rcheck_19 (File : System.Address; Line : Integer);
 406    procedure Rcheck_20 (File : System.Address; Line : Integer);
 407    procedure Rcheck_21 (File : System.Address; Line : Integer);
 408    procedure Rcheck_22 (File : System.Address; Line : Integer);
 409    procedure Rcheck_23 (File : System.Address; Line : Integer);
 410    procedure Rcheck_24 (File : System.Address; Line : Integer);
 411    procedure Rcheck_25 (File : System.Address; Line : Integer);
 412    procedure Rcheck_26 (File : System.Address; Line : Integer);
 413    procedure Rcheck_27 (File : System.Address; Line : Integer);
 414    procedure Rcheck_28 (File : System.Address; Line : Integer);
 415    procedure Rcheck_29 (File : System.Address; Line : Integer);
 416    procedure Rcheck_30 (File : System.Address; Line : Integer);
 417    procedure Rcheck_31 (File : System.Address; Line : Integer);
 418    procedure Rcheck_32 (File : System.Address; Line : Integer);
 419
 420    pragma Export (C, Rcheck_00, "__gnat_rcheck_00");
 421    pragma Export (C, Rcheck_01, "__gnat_rcheck_01");
 422    pragma Export (C, Rcheck_02, "__gnat_rcheck_02");
 423    pragma Export (C, Rcheck_03, "__gnat_rcheck_03");
 424    pragma Export (C, Rcheck_04, "__gnat_rcheck_04");
 425    pragma Export (C, Rcheck_05, "__gnat_rcheck_05");
 426    pragma Export (C, Rcheck_06, "__gnat_rcheck_06");
 427    pragma Export (C, Rcheck_07, "__gnat_rcheck_07");
 428    pragma Export (C, Rcheck_08, "__gnat_rcheck_08");
 429    pragma Export (C, Rcheck_09, "__gnat_rcheck_09");
 430    pragma Export (C, Rcheck_10, "__gnat_rcheck_10");
 431    pragma Export (C, Rcheck_11, "__gnat_rcheck_11");
 432    pragma Export (C, Rcheck_12, "__gnat_rcheck_12");
 433    pragma Export (C, Rcheck_13, "__gnat_rcheck_13");
 434    pragma Export (C, Rcheck_14, "__gnat_rcheck_14");
 435    pragma Export (C, Rcheck_15, "__gnat_rcheck_15");
 436    pragma Export (C, Rcheck_16, "__gnat_rcheck_16");
 437    pragma Export (C, Rcheck_17, "__gnat_rcheck_17");
 438    pragma Export (C, Rcheck_18, "__gnat_rcheck_18");
 439    pragma Export (C, Rcheck_19, "__gnat_rcheck_19");
 440    pragma Export (C, Rcheck_20, "__gnat_rcheck_20");
 441    pragma Export (C, Rcheck_21, "__gnat_rcheck_21");
 442    pragma Export (C, Rcheck_22, "__gnat_rcheck_22");
 443    pragma Export (C, Rcheck_23, "__gnat_rcheck_23");
 444    pragma Export (C, Rcheck_24, "__gnat_rcheck_24");
 445    pragma Export (C, Rcheck_25, "__gnat_rcheck_25");
 446    pragma Export (C, Rcheck_26, "__gnat_rcheck_26");
 447    pragma Export (C, Rcheck_27, "__gnat_rcheck_27");
 448    pragma Export (C, Rcheck_28, "__gnat_rcheck_28");
 449    pragma Export (C, Rcheck_29, "__gnat_rcheck_29");
 450    pragma Export (C, Rcheck_30, "__gnat_rcheck_30");
 451    pragma Export (C, Rcheck_31, "__gnat_rcheck_31");
 452    pragma Export (C, Rcheck_32, "__gnat_rcheck_32");
 453
 454    --  None of these procedures ever returns (they raise an exception!). By
 455    --  using pragma No_Return, we ensure that any junk code after the call,
 456    --  such as normal return epilog stuff, can be eliminated).
 457
 458    pragma No_Return (Rcheck_00);
 459    pragma No_Return (Rcheck_01);
 460    pragma No_Return (Rcheck_02);
 461    pragma No_Return (Rcheck_03);
 462    pragma No_Return (Rcheck_04);
 463    pragma No_Return (Rcheck_05);
 464    pragma No_Return (Rcheck_06);
 465    pragma No_Return (Rcheck_07);
 466    pragma No_Return (Rcheck_08);
 467    pragma No_Return (Rcheck_09);
 468    pragma No_Return (Rcheck_10);
 469    pragma No_Return (Rcheck_11);
 470    pragma No_Return (Rcheck_12);
 471    pragma No_Return (Rcheck_13);
 472    pragma No_Return (Rcheck_14);
 473    pragma No_Return (Rcheck_15);
 474    pragma No_Return (Rcheck_16);
 475    pragma No_Return (Rcheck_17);
 476    pragma No_Return (Rcheck_18);
 477    pragma No_Return (Rcheck_19);
 478    pragma No_Return (Rcheck_20);
 479    pragma No_Return (Rcheck_21);
 480    pragma No_Return (Rcheck_22);
 481    pragma No_Return (Rcheck_23);
 482    pragma No_Return (Rcheck_24);
 483    pragma No_Return (Rcheck_25);
 484    pragma No_Return (Rcheck_26);
 485    pragma No_Return (Rcheck_27);
 486    pragma No_Return (Rcheck_28);
 487    pragma No_Return (Rcheck_29);
 488    pragma No_Return (Rcheck_30);
 489    pragma No_Return (Rcheck_32);
 490
 491    ---------------------------------------------
 492    -- Reason Strings for Run-Time Check Calls --
 493    ---------------------------------------------
 494
 495    --  These strings are null-terminated and are used by Rcheck_nn. The
 496    --  strings correspond to the definitions for Types.RT_Exception_Code.
 497
 498    use ASCII;
 499
 500    Rmsg_00 : constant String := "access check failed"              & NUL;
 501    Rmsg_01 : constant String := "access parameter is null"         & NUL;
 502    Rmsg_02 : constant String := "discriminant check failed"        & NUL;
 503    Rmsg_03 : constant String := "divide by zero"                   & NUL;
 504    Rmsg_04 : constant String := "explicit raise"                   & NUL;
 505    Rmsg_05 : constant String := "index check failed"               & NUL;
 506    Rmsg_06 : constant String := "invalid data"                     & NUL;
 507    Rmsg_07 : constant String := "length check failed"              & NUL;
 508    Rmsg_08 : constant String := "null Exception_Id"                & NUL;
 509    Rmsg_09 : constant String := "null-exclusion check failed"      & NUL;
 510    Rmsg_10 : constant String := "overflow check failed"            & NUL;
 511    Rmsg_11 : constant String := "partition check failed"           & NUL;
 512    Rmsg_12 : constant String := "range check failed"               & NUL;
 513    Rmsg_13 : constant String := "tag check failed"                 & NUL;
 514    Rmsg_14 : constant String := "access before elaboration"        & NUL;
 515    Rmsg_15 : constant String := "accessibility check failed"       & NUL;
 516    Rmsg_16 : constant String := "all guards closed"                & NUL;
 517    Rmsg_17 : constant String := "Current_Task referenced in entry" &
 518                                 " body"                            & NUL;
 519    Rmsg_18 : constant String := "duplicated entry address"         & NUL;
 520    Rmsg_19 : constant String := "explicit raise"                   & NUL;
 521    Rmsg_20 : constant String := "finalize/adjust raised exception" & NUL;
 522    Rmsg_21 : constant String := "implicit return with No_Return"   & NUL;
 523    Rmsg_22 : constant String := "misaligned address value"         & NUL;
 524    Rmsg_23 : constant String := "missing return"                   & NUL;
 525    Rmsg_24 : constant String := "overlaid controlled object"       & NUL;
 526    Rmsg_25 : constant String := "potentially blocking operation"   & NUL;
 527    Rmsg_26 : constant String := "stubbed subprogram called"        & NUL;
 528    Rmsg_27 : constant String := "unchecked union restriction"      & NUL;
 529    Rmsg_28 : constant String := "actual/returned class-wide value "
 530                                 & "not transportable"              & NUL;
 531    Rmsg_29 : constant String := "empty storage pool"               & NUL;
 532    Rmsg_30 : constant String := "explicit raise"                   & NUL;
 533    Rmsg_31 : constant String := "infinite recursion"               & NUL;
 534    Rmsg_32 : constant String := "object too large"                 & NUL;
 535
 536    -----------------------
 537    -- Polling Interface --
 538    -----------------------
 539
 540    type Unsigned is mod 2 ** 32;
 541
 542    Counter : Unsigned := 0;
 543    pragma Warnings (Off, Counter);
 544    --  This counter is provided for convenience. It can be used in Poll to
 545    --  perform periodic but not systematic operations.
 546
 547    procedure Poll is separate;
 548    --  The actual polling routine is separate, so that it can easily
 549    --  be replaced with a target dependent version.
 550
 551    ------------------------------
 552    -- Current_Target_Exception --
 553    ------------------------------
 554
 555    function Current_Target_Exception return Exception_Occurrence is
 556    begin
 557       return Null_Occurrence;
 558    end Current_Target_Exception;
 559
 560    -------------------
 561    -- EId_To_String --
 562    -------------------
 563
 564    function EId_To_String (X : Exception_Id) return String
 565      renames Stream_Attributes.EId_To_String;
 566
 567    ------------------
 568    -- EO_To_String --
 569    ------------------
 570
 571    --  We use the null string to represent the null occurrence, otherwise
 572    --  we output the Exception_Information string for the occurrence.
 573
 574    function EO_To_String (X : Exception_Occurrence) return String
 575      renames Stream_Attributes.EO_To_String;
 576
 577    ------------------------
 578    -- Exception_Identity --
 579    ------------------------
 580
 581    function Exception_Identity
 582      (X : Exception_Occurrence) return Exception_Id
 583    is
 584    begin
 585       --  Note that the following test used to be here for the original
 586       --  Ada 95 semantics, but these were modified by AI-241 to require
 587       --  returning Null_Id instead of raising Constraint_Error.
 588
 589       --  if X.Id = Null_Id then
 590       --     raise Constraint_Error;
 591       --  end if;
 592
 593       return X.Id;
 594    end Exception_Identity;
 595
 596    ---------------------------
 597    -- Exception_Information --
 598    ---------------------------
 599
 600    function Exception_Information (X : Exception_Occurrence) return String is
 601    begin
 602       if X.Id = Null_Id then
 603          raise Constraint_Error;
 604       end if;
 605
 606       return Exception_Data.Exception_Information (X);
 607    end Exception_Information;
 608
 609    -----------------------
 610    -- Exception_Message --
 611    -----------------------
 612
 613    function Exception_Message (X : Exception_Occurrence) return String is
 614    begin
 615       if X.Id = Null_Id then
 616          raise Constraint_Error;
 617       end if;
 618
 619       return X.Msg (1 .. X.Msg_Length);
 620    end Exception_Message;
 621
 622    --------------------
 623    -- Exception_Name --
 624    --------------------
 625
 626    function Exception_Name (Id : Exception_Id) return String is
 627    begin
 628       if Id = null then
 629          raise Constraint_Error;
 630       end if;
 631
 632       return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1);
 633    end Exception_Name;
 634
 635    function Exception_Name (X : Exception_Occurrence) return String is
 636    begin
 637       return Exception_Name (X.Id);
 638    end Exception_Name;
 639
 640    ---------------------------
 641    -- Exception_Name_Simple --
 642    ---------------------------
 643
 644    function Exception_Name_Simple (X : Exception_Occurrence) return String is
 645       Name : constant String := Exception_Name (X);
 646       P    : Natural;
 647
 648    begin
 649       P := Name'Length;
 650       while P > 1 loop
 651          exit when Name (P - 1) = '.';
 652          P := P - 1;
 653       end loop;
 654
 655       --  Return result making sure lower bound is 1
 656
 657       declare
 658          subtype Rname is String (1 .. Name'Length - P + 1);
 659       begin
 660          return Rname (Name (P .. Name'Length));
 661       end;
 662    end Exception_Name_Simple;
 663
 664    --------------------
 665    -- Exception_Data --
 666    --------------------
 667
 668    package body Exception_Data is separate;
 669    --  This package can be easily dummied out if we do not want the
 670    --  basic support for exception messages (such as in Ada 83).
 671
 672    package body Exception_Propagation is
 673
 674       procedure Setup_Exception
 675         (Excep    : EOA;
 676          Current  : EOA;
 677          Reraised : Boolean := False)
 678       is
 679          pragma Warnings (Off, Excep);
 680          pragma Warnings (Off, Current);
 681          pragma Warnings (Off, Reraised);
 682       begin
 683          null;
 684       end Setup_Exception;
 685
 686    end Exception_Propagation;
 687
 688    ----------------------
 689    -- Exception_Traces --
 690    ----------------------
 691
 692    package body Exception_Traces is separate;
 693    --  Depending on the underlying support for IO the implementation
 694    --  will differ. Moreover we would like to dummy out this package
 695    --  in case we do not want any exception tracing support. This is
 696    --  why this package is separated.
 697
 698    -----------------------
 699    -- Stream Attributes --
 700    -----------------------
 701
 702    package body Stream_Attributes is separate;
 703    --  This package can be easily dummied out if we do not want the
 704    --  support for streaming Exception_Ids and Exception_Occurrences.
 705
 706    -----------------------------
 707    -- Process_Raise_Exception --
 708    -----------------------------
 709
 710    procedure Process_Raise_Exception (E : Exception_Id) is
 711       pragma Inspection_Point (E);
 712       --  This is so the debugger can reliably inspect the parameter
 713
 714       Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all;
 715       Excep       : constant EOA := Get_Current_Excep.all;
 716
 717       procedure builtin_longjmp (buffer : Address; Flag : Integer);
 718       pragma No_Return (builtin_longjmp);
 719       pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp");
 720
 721    begin
 722       --  WARNING: There should be no exception handler for this body
 723       --  because this would cause gigi to prepend a setup for a new
 724       --  jmpbuf to the sequence of statements in case of built-in sjljl.
 725       --  We would then always get this new buf in Jumpbuf_Ptr instead of the
 726       --  one for the exception we are handling, which would completely break
 727       --  the whole design of this procedure.
 728
 729       --  If the jump buffer pointer is non-null, transfer control using
 730       --  it. Otherwise announce an unhandled exception (note that this
 731       --  means that we have no finalizations to do other than at the outer
 732       --  level). Perform the necessary notification tasks in both cases.
 733
 734       if Jumpbuf_Ptr /= Null_Address then
 735          if not Excep.Exception_Raised then
 736             Excep.Exception_Raised := True;
 737             Exception_Traces.Notify_Handled_Exception;
 738          end if;
 739
 740          builtin_longjmp (Jumpbuf_Ptr, 1);
 741
 742       else
 743          Exception_Traces.Notify_Unhandled_Exception;
 744          Exception_Traces.Unhandled_Exception_Terminate;
 745       end if;
 746    end Process_Raise_Exception;
 747
 748    ----------------------------
 749    -- Raise_Constraint_Error --
 750    ----------------------------
 751
 752    procedure Raise_Constraint_Error
 753      (File : System.Address;
 754       Line : Integer)
 755    is
 756    begin
 757       Raise_With_Location_And_Msg
 758         (Constraint_Error_Def'Access, File, Line);
 759    end Raise_Constraint_Error;
 760
 761    --------------------------------
 762    -- Raise_Constraint_Error_Msg --
 763    --------------------------------
 764
 765    procedure Raise_Constraint_Error_Msg
 766      (File : System.Address;
 767       Line : Integer;
 768       Msg  : System.Address)
 769    is
 770    begin
 771       Raise_With_Location_And_Msg
 772         (Constraint_Error_Def'Access, File, Line, Msg);
 773    end Raise_Constraint_Error_Msg;
 774
 775    -------------------------
 776    -- Raise_Current_Excep --
 777    -------------------------
 778
 779    procedure Raise_Current_Excep (E : Exception_Id) is
 780
 781       pragma Inspection_Point (E);
 782       --  This is so the debugger can reliably inspect the parameter when
 783       --  inserting a breakpoint at the start of this procedure.
 784
 785       Id : Exception_Id := E;
 786       pragma Volatile (Id);
 787       pragma Warnings (Off, Id);
 788       --  In order to provide support for breakpoints on unhandled exceptions,
 789       --  the debugger will also need to be able to inspect the value of E from
 790       --  another (inner) frame. So we need to make sure that if E is passed in
 791       --  a register, its value is also spilled on stack. For this, we store
 792       --  the parameter value in a local variable, and add a pragma Volatile to
 793       --  make sure it is spilled. The pragma Warnings (Off) is needed because
 794       --  the compiler knows that Id is not referenced and that this use of
 795       --  pragma Volatile is peculiar!
 796
 797    begin
 798       Debug_Raise_Exception (E => SSL.Exception_Data_Ptr (E));
 799       Process_Raise_Exception (E);
 800    end Raise_Current_Excep;
 801
 802    ---------------------
 803    -- Raise_Exception --
 804    ---------------------
 805
 806    procedure Raise_Exception
 807      (E       : Exception_Id;
 808       Message : String := "")
 809    is
 810    begin
 811       if E /= null then
 812          Exception_Data.Set_Exception_Msg (E, Message);
 813          Abort_Defer.all;
 814          Raise_Current_Excep (E);
 815       end if;
 816
 817       --  Note: if E is null then just return (Ada 95 semantics)
 818
 819       return;
 820    end Raise_Exception;
 821
 822    ----------------------------
 823    -- Raise_Exception_Always --
 824    ----------------------------
 825
 826    procedure Raise_Exception_Always
 827      (E       : Exception_Id;
 828       Message : String := "")
 829    is
 830    begin
 831       Exception_Data.Set_Exception_Msg (E, Message);
 832       Abort_Defer.all;
 833       Raise_Current_Excep (E);
 834    end Raise_Exception_Always;
 835
 836    -------------------------------------
 837    -- Raise_From_Controlled_Operation --
 838    -------------------------------------
 839
 840    procedure Raise_From_Controlled_Operation
 841      (X : Ada.Exceptions.Exception_Occurrence)
 842    is
 843       Prefix   : constant String := "adjust/finalize raised ";
 844       Orig_Msg : constant String := Exception_Message (X);
 845       New_Msg  : constant String := Prefix & Exception_Name (X);
 846
 847    begin
 848       if Orig_Msg'Length >= Prefix'Length
 849         and then
 850           Orig_Msg (Orig_Msg'First .. Orig_Msg'First + Prefix'Length - 1) =
 851                                                                      Prefix
 852       then
 853          --  Message already has proper prefix, just re-reraise PROGRAM_ERROR
 854
 855          Raise_Exception_No_Defer
 856            (E       => Program_Error'Identity,
 857             Message => Orig_Msg);
 858
 859       elsif Orig_Msg = "" then
 860
 861          --  No message present: just provide our own
 862
 863          Raise_Exception_No_Defer
 864            (E       => Program_Error'Identity,
 865             Message => New_Msg);
 866
 867       else
 868          --  Message present, add informational prefix
 869
 870          Raise_Exception_No_Defer
 871            (E       => Program_Error'Identity,
 872             Message => New_Msg & ": " & Orig_Msg);
 873       end if;
 874    end Raise_From_Controlled_Operation;
 875
 876    -------------------------------
 877    -- Raise_From_Signal_Handler --
 878    -------------------------------
 879
 880    procedure Raise_From_Signal_Handler
 881      (E : Exception_Id;
 882       M : System.Address)
 883    is
 884    begin
 885       Exception_Data.Set_Exception_C_Msg (E, M);
 886       Abort_Defer.all;
 887       Process_Raise_Exception (E);
 888    end Raise_From_Signal_Handler;
 889
 890    -------------------------
 891    -- Raise_Program_Error --
 892    -------------------------
 893
 894    procedure Raise_Program_Error
 895      (File : System.Address;
 896       Line : Integer)
 897    is
 898    begin
 899       Raise_With_Location_And_Msg
 900         (Program_Error_Def'Access, File, Line);
 901    end Raise_Program_Error;
 902
 903    -----------------------------
 904    -- Raise_Program_Error_Msg --
 905    -----------------------------
 906
 907    procedure Raise_Program_Error_Msg
 908      (File : System.Address;
 909       Line : Integer;
 910       Msg  : System.Address)
 911    is
 912    begin
 913       Raise_With_Location_And_Msg
 914         (Program_Error_Def'Access, File, Line, Msg);
 915    end Raise_Program_Error_Msg;
 916
 917    -------------------------
 918    -- Raise_Storage_Error --
 919    -------------------------
 920
 921    procedure Raise_Storage_Error
 922      (File : System.Address;
 923       Line : Integer)
 924    is
 925    begin
 926       Raise_With_Location_And_Msg
 927         (Storage_Error_Def'Access, File, Line);
 928    end Raise_Storage_Error;
 929
 930    -----------------------------
 931    -- Raise_Storage_Error_Msg --
 932    -----------------------------
 933
 934    procedure Raise_Storage_Error_Msg
 935      (File : System.Address;
 936       Line : Integer;
 937       Msg  : System.Address)
 938    is
 939    begin
 940       Raise_With_Location_And_Msg
 941         (Storage_Error_Def'Access, File, Line, Msg);
 942    end Raise_Storage_Error_Msg;
 943
 944    ---------------------------------
 945    -- Raise_With_Location_And_Msg --
 946    ---------------------------------
 947
 948    procedure Raise_With_Location_And_Msg
 949      (E : Exception_Id;
 950       F : System.Address;
 951       L : Integer;
 952       M : System.Address := System.Null_Address)
 953    is
 954    begin
 955       Exception_Data.Set_Exception_C_Msg (E, F, L, M);
 956       Abort_Defer.all;
 957       Raise_Current_Excep (E);
 958    end Raise_With_Location_And_Msg;
 959
 960    --------------------
 961    -- Raise_With_Msg --
 962    --------------------
 963
 964    procedure Raise_With_Msg (E : Exception_Id) is
 965       Excep : constant EOA := Get_Current_Excep.all;
 966
 967    begin
 968       Excep.Exception_Raised := False;
 969       Excep.Id               := E;
 970       Excep.Num_Tracebacks   := 0;
 971       Excep.Cleanup_Flag     := False;
 972       Excep.Pid              := Local_Partition_ID;
 973       Abort_Defer.all;
 974       Raise_Current_Excep (E);
 975    end Raise_With_Msg;
 976
 977    --------------------------------------
 978    -- Calls to Run-Time Check Routines --
 979    --------------------------------------
 980
 981    procedure Rcheck_00 (File : System.Address; Line : Integer) is
 982    begin
 983       Raise_Constraint_Error_Msg (File, Line, Rmsg_00'Address);
 984    end Rcheck_00;
 985
 986    procedure Rcheck_01 (File : System.Address; Line : Integer) is
 987    begin
 988       Raise_Constraint_Error_Msg (File, Line, Rmsg_01'Address);
 989    end Rcheck_01;
 990
 991    procedure Rcheck_02 (File : System.Address; Line : Integer) is
 992    begin
 993       Raise_Constraint_Error_Msg (File, Line, Rmsg_02'Address);
 994    end Rcheck_02;
 995
 996    procedure Rcheck_03 (File : System.Address; Line : Integer) is
 997    begin
 998       Raise_Constraint_Error_Msg (File, Line, Rmsg_03'Address);
 999    end Rcheck_03;
1000
1001    procedure Rcheck_04 (File : System.Address; Line : Integer) is
1002    begin
1003       Raise_Constraint_Error_Msg (File, Line, Rmsg_04'Address);
1004    end Rcheck_04;
1005
1006    procedure Rcheck_05 (File : System.Address; Line : Integer) is
1007    begin
1008       Raise_Constraint_Error_Msg (File, Line, Rmsg_05'Address);
1009    end Rcheck_05;
1010
1011    procedure Rcheck_06 (File : System.Address; Line : Integer) is
1012    begin
1013       Raise_Constraint_Error_Msg (File, Line, Rmsg_06'Address);
1014    end Rcheck_06;
1015
1016    procedure Rcheck_07 (File : System.Address; Line : Integer) is
1017    begin
1018       Raise_Constraint_Error_Msg (File, Line, Rmsg_07'Address);
1019    end Rcheck_07;
1020
1021    procedure Rcheck_08 (File : System.Address; Line : Integer) is
1022    begin
1023       Raise_Constraint_Error_Msg (File, Line, Rmsg_08'Address);
1024    end Rcheck_08;
1025
1026    procedure Rcheck_09 (File : System.Address; Line : Integer) is
1027    begin
1028       Raise_Constraint_Error_Msg (File, Line, Rmsg_09'Address);
1029    end Rcheck_09;
1030
1031    procedure Rcheck_10 (File : System.Address; Line : Integer) is
1032    begin
1033       Raise_Constraint_Error_Msg (File, Line, Rmsg_10'Address);
1034    end Rcheck_10;
1035
1036    procedure Rcheck_11 (File : System.Address; Line : Integer) is
1037    begin
1038       Raise_Constraint_Error_Msg (File, Line, Rmsg_11'Address);
1039    end Rcheck_11;
1040
1041    procedure Rcheck_12 (File : System.Address; Line : Integer) is
1042    begin
1043       Raise_Constraint_Error_Msg (File, Line, Rmsg_12'Address);
1044    end Rcheck_12;
1045
1046    procedure Rcheck_13 (File : System.Address; Line : Integer) is
1047    begin
1048       Raise_Constraint_Error_Msg (File, Line, Rmsg_13'Address);
1049    end Rcheck_13;
1050
1051    procedure Rcheck_14 (File : System.Address; Line : Integer) is
1052    begin
1053       Raise_Program_Error_Msg (File, Line, Rmsg_14'Address);
1054    end Rcheck_14;
1055
1056    procedure Rcheck_15 (File : System.Address; Line : Integer) is
1057    begin
1058       Raise_Program_Error_Msg (File, Line, Rmsg_15'Address);
1059    end Rcheck_15;
1060
1061    procedure Rcheck_16 (File : System.Address; Line : Integer) is
1062    begin
1063       Raise_Program_Error_Msg (File, Line, Rmsg_16'Address);
1064    end Rcheck_16;
1065
1066    procedure Rcheck_17 (File : System.Address; Line : Integer) is
1067    begin
1068       Raise_Program_Error_Msg (File, Line, Rmsg_17'Address);
1069    end Rcheck_17;
1070
1071    procedure Rcheck_18 (File : System.Address; Line : Integer) is
1072    begin
1073       Raise_Program_Error_Msg (File, Line, Rmsg_18'Address);
1074    end Rcheck_18;
1075
1076    procedure Rcheck_19 (File : System.Address; Line : Integer) is
1077    begin
1078       Raise_Program_Error_Msg (File, Line, Rmsg_19'Address);
1079    end Rcheck_19;
1080
1081    procedure Rcheck_20 (File : System.Address; Line : Integer) is
1082    begin
1083       Raise_Program_Error_Msg (File, Line, Rmsg_20'Address);
1084    end Rcheck_20;
1085
1086    procedure Rcheck_21 (File : System.Address; Line : Integer) is
1087    begin
1088       Raise_Program_Error_Msg (File, Line, Rmsg_21'Address);
1089    end Rcheck_21;
1090
1091    procedure Rcheck_22 (File : System.Address; Line : Integer) is
1092    begin
1093       Raise_Program_Error_Msg (File, Line, Rmsg_22'Address);
1094    end Rcheck_22;
1095
1096    procedure Rcheck_23 (File : System.Address; Line : Integer) is
1097    begin
1098       Raise_Program_Error_Msg (File, Line, Rmsg_23'Address);
1099    end Rcheck_23;
1100
1101    procedure Rcheck_24 (File : System.Address; Line : Integer) is
1102    begin
1103       Raise_Program_Error_Msg (File, Line, Rmsg_24'Address);
1104    end Rcheck_24;
1105
1106    procedure Rcheck_25 (File : System.Address; Line : Integer) is
1107    begin
1108       Raise_Program_Error_Msg (File, Line, Rmsg_25'Address);
1109    end Rcheck_25;
1110
1111    procedure Rcheck_26 (File : System.Address; Line : Integer) is
1112    begin
1113       Raise_Program_Error_Msg (File, Line, Rmsg_26'Address);
1114    end Rcheck_26;
1115
1116    procedure Rcheck_27 (File : System.Address; Line : Integer) is
1117    begin
1118       Raise_Program_Error_Msg (File, Line, Rmsg_27'Address);
1119    end Rcheck_27;
1120
1121    procedure Rcheck_28 (File : System.Address; Line : Integer) is
1122    begin
1123       Raise_Program_Error_Msg (File, Line, Rmsg_28'Address);
1124    end Rcheck_28;
1125
1126    procedure Rcheck_29 (File : System.Address; Line : Integer) is
1127    begin
1128       Raise_Storage_Error_Msg (File, Line, Rmsg_29'Address);
1129    end Rcheck_29;
1130
1131    procedure Rcheck_30 (File : System.Address; Line : Integer) is
1132    begin
1133       Raise_Storage_Error_Msg (File, Line, Rmsg_30'Address);
1134    end Rcheck_30;
1135
1136    procedure Rcheck_31 (File : System.Address; Line : Integer) is
1137    begin
1138       Raise_Storage_Error_Msg (File, Line, Rmsg_31'Address);
1139    end Rcheck_31;
1140
1141    procedure Rcheck_32 (File : System.Address; Line : Integer) is
1142    begin
1143       Raise_Storage_Error_Msg (File, Line, Rmsg_32'Address);
1144    end Rcheck_32;
1145
1146    -------------
1147    -- Reraise --
1148    -------------
1149
1150    procedure Reraise is
1151       Excep : constant EOA := Get_Current_Excep.all;
1152
1153    begin
1154       Abort_Defer.all;
1155       Raise_Current_Excep (Excep.Id);
1156    end Reraise;
1157
1158    ------------------------
1159    -- Reraise_Occurrence --
1160    ------------------------
1161
1162    procedure Reraise_Occurrence (X : Exception_Occurrence) is
1163    begin
1164       if X.Id /= null then
1165          Abort_Defer.all;
1166          Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1167          Raise_Current_Excep (X.Id);
1168       end if;
1169    end Reraise_Occurrence;
1170
1171    -------------------------------
1172    -- Reraise_Occurrence_Always --
1173    -------------------------------
1174
1175    procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is
1176    begin
1177       Abort_Defer.all;
1178       Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1179       Raise_Current_Excep (X.Id);
1180    end Reraise_Occurrence_Always;
1181
1182    ---------------------------------
1183    -- Reraise_Occurrence_No_Defer --
1184    ---------------------------------
1185
1186    procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is
1187    begin
1188       Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1189       Raise_Current_Excep (X.Id);
1190    end Reraise_Occurrence_No_Defer;
1191
1192    ---------------------
1193    -- Save_Occurrence --
1194    ---------------------
1195
1196    procedure Save_Occurrence
1197      (Target : out Exception_Occurrence;
1198       Source : Exception_Occurrence)
1199    is
1200    begin
1201       Save_Occurrence_No_Private (Target, Source);
1202    end Save_Occurrence;
1203
1204    function Save_Occurrence (Source : Exception_Occurrence) return EOA is
1205       Target : constant EOA := new Exception_Occurrence;
1206    begin
1207       Save_Occurrence (Target.all, Source);
1208       return Target;
1209    end Save_Occurrence;
1210
1211    --------------------------------
1212    -- Save_Occurrence_No_Private --
1213    --------------------------------
1214
1215    procedure Save_Occurrence_No_Private
1216      (Target : out Exception_Occurrence;
1217       Source : Exception_Occurrence)
1218    is
1219    begin
1220       Target.Id             := Source.Id;
1221       Target.Msg_Length     := Source.Msg_Length;
1222       Target.Num_Tracebacks := Source.Num_Tracebacks;
1223       Target.Pid            := Source.Pid;
1224       Target.Cleanup_Flag   := Source.Cleanup_Flag;
1225
1226       Target.Msg (1 .. Target.Msg_Length) :=
1227         Source.Msg (1 .. Target.Msg_Length);
1228
1229       Target.Tracebacks (1 .. Target.Num_Tracebacks) :=
1230         Source.Tracebacks (1 .. Target.Num_Tracebacks);
1231    end Save_Occurrence_No_Private;
1232
1233    -------------------------
1234    -- Transfer_Occurrence --
1235    -------------------------
1236
1237    procedure Transfer_Occurrence
1238      (Target : Exception_Occurrence_Access;
1239       Source : Exception_Occurrence)
1240    is
1241    begin
1242       --  Setup Target as an exception to be propagated in the calling task
1243       --  (rendezvous-wise), taking care not to clobber the associated private
1244       --  data.  Target is expected to be a pointer to the calling task's
1245       --  fixed TSD occurrence, which is very different from Get_Current_Excep
1246       --  here because this subprogram is called from the called task.
1247
1248       Save_Occurrence_No_Private (Target.all, Source);
1249    end Transfer_Occurrence;
1250
1251    -------------------
1252    -- String_To_EId --
1253    -------------------
1254
1255    function String_To_EId (S : String) return Exception_Id
1256      renames Stream_Attributes.String_To_EId;
1257
1258    ------------------
1259    -- String_To_EO --
1260    ------------------
1261
1262    function String_To_EO (S : String) return Exception_Occurrence
1263      renames Stream_Attributes.String_To_EO;
1264
1265    ------------------------------
1266    -- Raise_Exception_No_Defer --
1267    ------------------------------
1268
1269    procedure Raise_Exception_No_Defer
1270      (E       : Exception_Id;
1271       Message : String := "")
1272    is
1273    begin
1274       Exception_Data.Set_Exception_Msg (E, Message);
1275
1276       --  Do not call Abort_Defer.all, as specified by the spec
1277
1278       Raise_Current_Excep (E);
1279    end Raise_Exception_No_Defer;
1280
1281    ---------------
1282    -- To_Stderr --
1283    ---------------
1284
1285    procedure To_Stderr (C : Character) is
1286
1287       type int is new Integer;
1288
1289       procedure put_char_stderr (C : int);
1290       pragma Import (C, put_char_stderr, "put_char_stderr");
1291
1292    begin
1293       put_char_stderr (Character'Pos (C));
1294    end To_Stderr;
1295
1296    procedure To_Stderr (S : String) is
1297    begin
1298       for J in S'Range loop
1299          if S (J) /= ASCII.CR then
1300             To_Stderr (S (J));
1301          end if;
1302       end loop;
1303    end To_Stderr;
1304
1305 end Ada.Exceptions;