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) 1992-2009, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This version of Ada.Exceptions is a full Ada 95 version, and Ada 2005
  33 --  features such as the additional definitions of Exception_Name returning
  34 --  Wide_[Wide_]String.
  35
  36 --  It is used for building the compiler and the basic tools, since these
  37 --  builds may be done with bootstrap compilers that cannot handle these
  38 --  additions. The full version of Ada.Exceptions can be found in the files
  39 --  a-except-2005.ads/adb, and is used for all other builds where full Ada
  40 --  2005 functionality is required. In particular, it is used for building
  41 --  run times on all targets.
  42
  43 pragma Compiler_Unit;
  44
  45 pragma Style_Checks (All_Checks);
  46 --  No subprogram ordering check, due to logical grouping
  47
  48 pragma Polling (Off);
  49 --  We must turn polling off for this unit, because otherwise we get
  50 --  elaboration circularities with System.Exception_Tables.
  51
  52 with System;                  use System;
  53 with System.Exceptions;       use System.Exceptions;
  54 with System.Standard_Library; use System.Standard_Library;
  55 with System.Soft_Links;       use System.Soft_Links;
  56
  57 package body Ada.Exceptions is
  58
  59    pragma Suppress (All_Checks);
  60    --  We definitely do not want exceptions occurring within this unit, or we
  61    --  are in big trouble. If an exceptional situation does occur, better that
  62    --  it not be raised, since raising it can cause confusing chaos.
  63
  64    -----------------------
  65    -- Local Subprograms --
  66    -----------------------
  67
  68    --  Note: the exported subprograms in this package body are called directly
  69    --  from C clients using the given external name, even though they are not
  70    --  technically visible in the Ada sense.
  71
  72    procedure Process_Raise_Exception (E : Exception_Id);
  73    pragma No_Return (Process_Raise_Exception);
  74    --  This is the lowest level raise routine. It raises the exception
  75    --  referenced by Current_Excep.all in the TSD, without deferring abort
  76    --  (the caller must ensure that abort is deferred on entry).
  77
  78    procedure To_Stderr (S : String);
  79    pragma Export (Ada, To_Stderr, "__gnat_to_stderr");
  80    --  Little routine to output string to stderr that is also used in the
  81    --  tasking run time.
  82
  83    procedure To_Stderr (C : Character);
  84    pragma Inline (To_Stderr);
  85    pragma Export (Ada, To_Stderr, "__gnat_to_stderr_char");
  86    --  Little routine to output a character to stderr, used by some of the
  87    --  separate units below.
  88
  89    package Exception_Data is
  90
  91       ---------------------------------
  92       -- Exception messages routines --
  93       ---------------------------------
  94
  95       procedure Set_Exception_C_Msg
  96         (Id   : Exception_Id;
  97          Msg1 : System.Address;
  98          Line : Integer        := 0;
  99          Msg2 : System.Address := System.Null_Address);
 100       --  This routine is called to setup the exception referenced by the
 101       --  Current_Excep field in the TSD to contain the indicated Id value
 102       --  and message. Msg1 is a null terminated string which is generated
 103       --  as the exception message. If line is non-zero, then a colon and
 104       --  the decimal representation of this integer is appended to the
 105       --  message. When Msg2 is non-null, a space and this additional null
 106       --  terminated string is added to the message.
 107
 108       procedure Set_Exception_Msg
 109         (Id      : Exception_Id;
 110          Message : String);
 111       --  This routine is called to setup the exception referenced by the
 112       --  Current_Excep field in the TSD to contain the indicated Id value and
 113       --  message. Message is a string which is generated as the exception
 114       --  message.
 115
 116       --------------------------------------
 117       -- Exception information subprogram --
 118       --------------------------------------
 119
 120       function Exception_Information (X : Exception_Occurrence) return String;
 121       --  The format of the exception information is as follows:
 122       --
 123       --    Exception_Name: <exception name> (as in Exception_Name)
 124       --    Message: <message> (only if Exception_Message is empty)
 125       --    PID=nnnn (only if != 0)
 126       --    Call stack traceback locations:  (only if at least one location)
 127       --    <0xyyyyyyyy 0xyyyyyyyy ...>      (is recorded)
 128       --
 129       --  The lines are separated by a ASCII.LF character
 130       --
 131       --  The nnnn is the partition Id given as decimal digits
 132       --
 133       --  The 0x... line represents traceback program counter locations, in
 134       --  execution order with the first one being the exception location. It
 135       --  is present only
 136       --
 137       --  The Exception_Name and Message lines are omitted in the abort signal
 138       --  case, since this is not really an exception.
 139
 140       --  Note: If the format of the generated string is changed, please note
 141       --  that an equivalent modification to the routine String_To_EO must be
 142       --  made to preserve proper functioning of the stream attributes.
 143
 144       ---------------------------------------
 145       -- Exception backtracing subprograms --
 146       ---------------------------------------
 147
 148       --  What is automatically output when exception tracing is on is the
 149       --  usual exception information with the call chain backtrace possibly
 150       --  tailored by a backtrace decorator. Modifying Exception_Information
 151       --  itself is not a good idea because the decorated output is completely
 152       --  out of control and would break all our code related to the streaming
 153       --  of exceptions.  We then provide an alternative function to compute
 154       --  the possibly tailored output, which is equivalent if no decorator is
 155       --  currently set:
 156
 157       function Tailored_Exception_Information
 158         (X : Exception_Occurrence) return String;
 159       --  Exception information to be output in the case of automatic tracing
 160       --  requested through GNAT.Exception_Traces.
 161       --
 162       --  This is the same as Exception_Information if no backtrace decorator
 163       --  is currently in place. Otherwise, this is Exception_Information with
 164       --  the call chain raw addresses replaced by the result of a call to the
 165       --  current decorator provided with the call chain addresses.
 166
 167       pragma Export
 168         (Ada, Tailored_Exception_Information,
 169            "__gnat_tailored_exception_information");
 170       --  This is currently used by System.Tasking.Stages
 171
 172    end Exception_Data;
 173
 174    package Exception_Traces is
 175
 176       use Exception_Data;
 177       --  Imports Tailored_Exception_Information
 178
 179       ----------------------------------------------
 180       -- Run-Time Exception Notification Routines --
 181       ----------------------------------------------
 182
 183       --  These subprograms provide a common run-time interface to trigger the
 184       --  actions required when an exception is about to be propagated (e.g.
 185       --  user specified actions or output of exception information). They are
 186       --  exported to be usable by the Ada exception handling personality
 187       --  routine when the GCC 3 mechanism is used.
 188
 189       procedure Notify_Handled_Exception;
 190       pragma Export
 191         (C, Notify_Handled_Exception, "__gnat_notify_handled_exception");
 192       --  This routine is called for a handled occurrence is about to be
 193       --  propagated.
 194
 195       procedure Notify_Unhandled_Exception;
 196       pragma Export
 197         (C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception");
 198       --  This routine is called when an unhandled occurrence is about to be
 199       --  propagated.
 200
 201       procedure Unhandled_Exception_Terminate;
 202       pragma No_Return (Unhandled_Exception_Terminate);
 203       --  This procedure is called to terminate program execution following an
 204       --  unhandled exception. The exception information, including traceback
 205       --  if available is output, and execution is then terminated. Note that
 206       --  at the point where this routine is called, the stack has typically
 207       --  been destroyed.
 208
 209    end Exception_Traces;
 210
 211    package Exception_Propagation is
 212
 213       procedure Setup_Exception
 214         (Excep    : EOA;
 215          Current  : EOA;
 216          Reraised : Boolean := False);
 217       --  Dummy routine used to share a-exexda.adb, do nothing
 218
 219    end Exception_Propagation;
 220
 221    package Stream_Attributes is
 222
 223       --------------------------------
 224       -- Stream attributes routines --
 225       --------------------------------
 226
 227       function EId_To_String (X : Exception_Id) return String;
 228       function String_To_EId (S : String) return Exception_Id;
 229       --  Functions for implementing Exception_Id stream attributes
 230
 231       function EO_To_String (X : Exception_Occurrence) return String;
 232       function String_To_EO (S : String) return Exception_Occurrence;
 233       --  Functions for implementing Exception_Occurrence stream
 234       --  attributes
 235
 236    end Stream_Attributes;
 237
 238    procedure Raise_Current_Excep (E : Exception_Id);
 239    pragma No_Return (Raise_Current_Excep);
 240    pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg");
 241    --  This is a simple wrapper to Process_Raise_Exception.
 242    --
 243    --  This external name for Raise_Current_Excep is historical, and probably
 244    --  should be changed but for now we keep it, because gdb and gigi know
 245    --  about it.
 246
 247    procedure Raise_Exception_No_Defer
 248       (E : Exception_Id; Message : String := "");
 249    pragma Export
 250     (Ada, Raise_Exception_No_Defer,
 251      "ada__exceptions__raise_exception_no_defer");
 252    pragma No_Return (Raise_Exception_No_Defer);
 253    --  Similar to Raise_Exception, but with no abort deferral
 254
 255    procedure Raise_With_Msg (E : Exception_Id);
 256    pragma No_Return (Raise_With_Msg);
 257    pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg");
 258    --  Raises an exception with given exception id value. A message is
 259    --  associated with the raise, and has already been stored in the exception
 260    --  occurrence referenced by the Current_Excep in the TSD. Abort is deferred
 261    --  before the raise call.
 262
 263    procedure Raise_With_Location_And_Msg
 264      (E : Exception_Id;
 265       F : System.Address;
 266       L : Integer;
 267       M : System.Address := System.Null_Address);
 268    pragma No_Return (Raise_With_Location_And_Msg);
 269    --  Raise an exception with given exception id value. A filename and line
 270    --  number is associated with the raise and is stored in the exception
 271    --  occurrence and in addition a string message M is appended to this
 272    --  if M is not null.
 273
 274    procedure Raise_Constraint_Error
 275      (File : System.Address;
 276       Line : Integer);
 277    pragma No_Return (Raise_Constraint_Error);
 278    pragma Export
 279      (C, Raise_Constraint_Error, "__gnat_raise_constraint_error");
 280    --  Raise constraint error with file:line information
 281
 282    procedure Raise_Constraint_Error_Msg
 283      (File : System.Address;
 284       Line : Integer;
 285       Msg  : System.Address);
 286    pragma No_Return (Raise_Constraint_Error_Msg);
 287    pragma Export
 288      (C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg");
 289    --  Raise constraint error with file:line + msg information
 290
 291    procedure Raise_Program_Error
 292      (File : System.Address;
 293       Line : Integer);
 294    pragma No_Return (Raise_Program_Error);
 295    pragma Export
 296      (C, Raise_Program_Error, "__gnat_raise_program_error");
 297    --  Raise program error with file:line information
 298
 299    procedure Raise_Program_Error_Msg
 300      (File : System.Address;
 301       Line : Integer;
 302       Msg  : System.Address);
 303    pragma No_Return (Raise_Program_Error_Msg);
 304    pragma Export
 305      (C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg");
 306    --  Raise program error with file:line + msg information
 307
 308    procedure Raise_Storage_Error
 309      (File : System.Address;
 310       Line : Integer);
 311    pragma No_Return (Raise_Storage_Error);
 312    pragma Export
 313      (C, Raise_Storage_Error, "__gnat_raise_storage_error");
 314    --  Raise storage error with file:line information
 315
 316    procedure Raise_Storage_Error_Msg
 317      (File : System.Address;
 318       Line : Integer;
 319       Msg  : System.Address);
 320    pragma No_Return (Raise_Storage_Error_Msg);
 321    pragma Export
 322      (C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg");
 323    --  Raise storage error with file:line + reason msg information
 324
 325    --  The exception raising process and the automatic tracing mechanism rely
 326    --  on some careful use of flags attached to the exception occurrence. The
 327    --  graph below illustrates the relations between the Raise_ subprograms
 328    --  and identifies the points where basic flags such as Exception_Raised
 329    --  are initialized.
 330    --
 331    --  (i) signs indicate the flags initialization points. R stands for Raise,
 332    --  W for With, and E for Exception.
 333    --
 334    --                   R_No_Msg    R_E   R_Pe  R_Ce  R_Se
 335    --                       |        |     |     |     |
 336    --                       +--+  +--+     +---+ | +---+
 337    --                          |  |            | | |
 338    --     R_E_No_Defer(i)    R_W_Msg(i)       R_W_Loc
 339    --           |               |              |   |
 340    --           +------------+  |  +-----------+   +--+
 341    --                        |  |  |                  |
 342    --                        |  |  |             Set_E_C_Msg(i)
 343    --                        |  |  |
 344    --                   Raise_Current_Excep
 345
 346    procedure Reraise;
 347    pragma No_Return (Reraise);
 348    pragma Export (C, Reraise, "__gnat_reraise");
 349    --  Reraises the exception referenced by the Current_Excep field of the TSD
 350    --  (all fields of this exception occurrence are set). Abort is deferred
 351    --  before the reraise operation.
 352
 353    --  Save_Occurrence variations: As the management of the private data
 354    --  attached to occurrences is delicate, whether or not pointers to such
 355    --  data has to be copied in various situations is better made explicit.
 356    --  The following procedures provide an internal interface to help making
 357    --  this explicit.
 358
 359    procedure Save_Occurrence_No_Private
 360      (Target : out Exception_Occurrence;
 361       Source : Exception_Occurrence);
 362    --  Copy all the components of Source to Target, except the
 363    --  Private_Data pointer.
 364
 365    procedure Transfer_Occurrence
 366      (Target : Exception_Occurrence_Access;
 367       Source : Exception_Occurrence);
 368    pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence");
 369    --  Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous
 370    --  to setup Target from Source as an exception to be propagated in the
 371    --  caller task. Target is expected to be a pointer to the fixed TSD
 372    --  occurrence for this task.
 373
 374    -----------------------------
 375    -- Run-Time Check Routines --
 376    -----------------------------
 377
 378    --  Routines to a specific exception with a reason message attached. The
 379    --  parameters are the file name and line number in each case. The names are
 380    --  keyed to the codes defined in types.ads and a-types.h (for example, the
 381    --  name Rcheck_05 refers to the Reason RT_Exception_Code'Val (5)).
 382
 383    procedure Rcheck_00 (File : System.Address; Line : Integer);
 384    procedure Rcheck_01 (File : System.Address; Line : Integer);
 385    procedure Rcheck_02 (File : System.Address; Line : Integer);
 386    procedure Rcheck_03 (File : System.Address; Line : Integer);
 387    procedure Rcheck_04 (File : System.Address; Line : Integer);
 388    procedure Rcheck_05 (File : System.Address; Line : Integer);
 389    procedure Rcheck_06 (File : System.Address; Line : Integer);
 390    procedure Rcheck_07 (File : System.Address; Line : Integer);
 391    procedure Rcheck_08 (File : System.Address; Line : Integer);
 392    procedure Rcheck_09 (File : System.Address; Line : Integer);
 393    procedure Rcheck_10 (File : System.Address; Line : Integer);
 394    procedure Rcheck_11 (File : System.Address; Line : Integer);
 395    procedure Rcheck_12 (File : System.Address; Line : Integer);
 396    procedure Rcheck_13 (File : System.Address; Line : Integer);
 397    procedure Rcheck_14 (File : System.Address; Line : Integer);
 398    procedure Rcheck_15 (File : System.Address; Line : Integer);
 399    procedure Rcheck_16 (File : System.Address; Line : Integer);
 400    procedure Rcheck_17 (File : System.Address; Line : Integer);
 401    procedure Rcheck_18 (File : System.Address; Line : Integer);
 402    procedure Rcheck_19 (File : System.Address; Line : Integer);
 403    procedure Rcheck_20 (File : System.Address; Line : Integer);
 404    procedure Rcheck_21 (File : System.Address; Line : Integer);
 405    procedure Rcheck_22 (File : System.Address; Line : Integer);
 406    procedure Rcheck_23 (File : System.Address; Line : Integer);
 407    procedure Rcheck_24 (File : System.Address; Line : Integer);
 408    procedure Rcheck_25 (File : System.Address; Line : Integer);
 409    procedure Rcheck_26 (File : System.Address; Line : Integer);
 410    procedure Rcheck_27 (File : System.Address; Line : Integer);
 411    procedure Rcheck_28 (File : System.Address; Line : Integer);
 412    procedure Rcheck_29 (File : System.Address; Line : Integer);
 413    procedure Rcheck_30 (File : System.Address; Line : Integer);
 414    procedure Rcheck_31 (File : System.Address; Line : Integer);
 415    procedure Rcheck_32 (File : System.Address; Line : Integer);
 416    procedure Rcheck_33 (File : System.Address; Line : Integer);
 417
 418    pragma Export (C, Rcheck_00, "__gnat_rcheck_00");
 419    pragma Export (C, Rcheck_01, "__gnat_rcheck_01");
 420    pragma Export (C, Rcheck_02, "__gnat_rcheck_02");
 421    pragma Export (C, Rcheck_03, "__gnat_rcheck_03");
 422    pragma Export (C, Rcheck_04, "__gnat_rcheck_04");
 423    pragma Export (C, Rcheck_05, "__gnat_rcheck_05");
 424    pragma Export (C, Rcheck_06, "__gnat_rcheck_06");
 425    pragma Export (C, Rcheck_07, "__gnat_rcheck_07");
 426    pragma Export (C, Rcheck_08, "__gnat_rcheck_08");
 427    pragma Export (C, Rcheck_09, "__gnat_rcheck_09");
 428    pragma Export (C, Rcheck_10, "__gnat_rcheck_10");
 429    pragma Export (C, Rcheck_11, "__gnat_rcheck_11");
 430    pragma Export (C, Rcheck_12, "__gnat_rcheck_12");
 431    pragma Export (C, Rcheck_13, "__gnat_rcheck_13");
 432    pragma Export (C, Rcheck_14, "__gnat_rcheck_14");
 433    pragma Export (C, Rcheck_15, "__gnat_rcheck_15");
 434    pragma Export (C, Rcheck_16, "__gnat_rcheck_16");
 435    pragma Export (C, Rcheck_17, "__gnat_rcheck_17");
 436    pragma Export (C, Rcheck_18, "__gnat_rcheck_18");
 437    pragma Export (C, Rcheck_19, "__gnat_rcheck_19");
 438    pragma Export (C, Rcheck_20, "__gnat_rcheck_20");
 439    pragma Export (C, Rcheck_21, "__gnat_rcheck_21");
 440    pragma Export (C, Rcheck_22, "__gnat_rcheck_22");
 441    pragma Export (C, Rcheck_23, "__gnat_rcheck_23");
 442    pragma Export (C, Rcheck_24, "__gnat_rcheck_24");
 443    pragma Export (C, Rcheck_25, "__gnat_rcheck_25");
 444    pragma Export (C, Rcheck_26, "__gnat_rcheck_26");
 445    pragma Export (C, Rcheck_27, "__gnat_rcheck_27");
 446    pragma Export (C, Rcheck_28, "__gnat_rcheck_28");
 447    pragma Export (C, Rcheck_29, "__gnat_rcheck_29");
 448    pragma Export (C, Rcheck_30, "__gnat_rcheck_30");
 449    pragma Export (C, Rcheck_31, "__gnat_rcheck_31");
 450    pragma Export (C, Rcheck_32, "__gnat_rcheck_32");
 451    pragma Export (C, Rcheck_33, "__gnat_rcheck_33");
 452
 453    --  None of these procedures ever returns (they raise an exception!). By
 454    --  using pragma No_Return, we ensure that any junk code after the call,
 455    --  such as normal return epilog stuff, can be eliminated).
 456
 457    pragma No_Return (Rcheck_00);
 458    pragma No_Return (Rcheck_01);
 459    pragma No_Return (Rcheck_02);
 460    pragma No_Return (Rcheck_03);
 461    pragma No_Return (Rcheck_04);
 462    pragma No_Return (Rcheck_05);
 463    pragma No_Return (Rcheck_06);
 464    pragma No_Return (Rcheck_07);
 465    pragma No_Return (Rcheck_08);
 466    pragma No_Return (Rcheck_09);
 467    pragma No_Return (Rcheck_10);
 468    pragma No_Return (Rcheck_11);
 469    pragma No_Return (Rcheck_12);
 470    pragma No_Return (Rcheck_13);
 471    pragma No_Return (Rcheck_14);
 472    pragma No_Return (Rcheck_15);
 473    pragma No_Return (Rcheck_16);
 474    pragma No_Return (Rcheck_17);
 475    pragma No_Return (Rcheck_18);
 476    pragma No_Return (Rcheck_19);
 477    pragma No_Return (Rcheck_20);
 478    pragma No_Return (Rcheck_21);
 479    pragma No_Return (Rcheck_22);
 480    pragma No_Return (Rcheck_23);
 481    pragma No_Return (Rcheck_24);
 482    pragma No_Return (Rcheck_25);
 483    pragma No_Return (Rcheck_26);
 484    pragma No_Return (Rcheck_27);
 485    pragma No_Return (Rcheck_28);
 486    pragma No_Return (Rcheck_29);
 487    pragma No_Return (Rcheck_30);
 488    pragma No_Return (Rcheck_32);
 489    pragma No_Return (Rcheck_33);
 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 := "attempt to take address of"       &
 517                                 " intrinsic subprogram"            & NUL;
 518    Rmsg_17 : constant String := "all guards closed"                & NUL;
 519    Rmsg_18 : constant String := "Current_Task referenced in entry" &
 520                                 " body"                            & NUL;
 521    Rmsg_19 : constant String := "duplicated entry address"         & NUL;
 522    Rmsg_20 : constant String := "explicit raise"                   & NUL;
 523    Rmsg_21 : constant String := "finalize/adjust raised exception" & NUL;
 524    Rmsg_22 : constant String := "implicit return with No_Return"   & NUL;
 525    Rmsg_23 : constant String := "misaligned address value"         & NUL;
 526    Rmsg_24 : constant String := "missing return"                   & NUL;
 527    Rmsg_25 : constant String := "overlaid controlled object"       & NUL;
 528    Rmsg_26 : constant String := "potentially blocking operation"   & NUL;
 529    Rmsg_27 : constant String := "stubbed subprogram called"        & NUL;
 530    Rmsg_28 : constant String := "unchecked union restriction"      & NUL;
 531    Rmsg_29 : constant String := "actual/returned class-wide"       &
 532                                 " value not transportable"         & NUL;
 533    Rmsg_30 : constant String := "empty storage pool"               & NUL;
 534    Rmsg_31 : constant String := "explicit raise"                   & NUL;
 535    Rmsg_32 : constant String := "infinite recursion"               & NUL;
 536    Rmsg_33 : constant String := "object too large"                 & NUL;
 537
 538    -----------------------
 539    -- Polling Interface --
 540    -----------------------
 541
 542    type Unsigned is mod 2 ** 32;
 543
 544    Counter : Unsigned := 0;
 545    pragma Warnings (Off, Counter);
 546    --  This counter is provided for convenience. It can be used in Poll to
 547    --  perform periodic but not systematic operations.
 548
 549    procedure Poll is separate;
 550    --  The actual polling routine is separate, so that it can easily be
 551    --  replaced with a target dependent version.
 552
 553    ------------------------------
 554    -- Current_Target_Exception --
 555    ------------------------------
 556
 557    function Current_Target_Exception return Exception_Occurrence is
 558    begin
 559       return Null_Occurrence;
 560    end Current_Target_Exception;
 561
 562    -------------------
 563    -- EId_To_String --
 564    -------------------
 565
 566    function EId_To_String (X : Exception_Id) return String
 567      renames Stream_Attributes.EId_To_String;
 568
 569    ------------------
 570    -- EO_To_String --
 571    ------------------
 572
 573    --  We use the null string to represent the null occurrence, otherwise we
 574    --  output the Exception_Information string for the occurrence.
 575
 576    function EO_To_String (X : Exception_Occurrence) return String
 577      renames Stream_Attributes.EO_To_String;
 578
 579    ------------------------
 580    -- Exception_Identity --
 581    ------------------------
 582
 583    function Exception_Identity
 584      (X : Exception_Occurrence) return Exception_Id
 585    is
 586    begin
 587       --  Note that the following test used to be here for the original Ada 95
 588       --  semantics, but these were modified by AI-241 to require returning
 589       --  Null_Id instead of raising Constraint_Error.
 590
 591       --  if X.Id = Null_Id then
 592       --     raise Constraint_Error;
 593       --  end if;
 594
 595       return X.Id;
 596    end Exception_Identity;
 597
 598    ---------------------------
 599    -- Exception_Information --
 600    ---------------------------
 601
 602    function Exception_Information (X : Exception_Occurrence) return String is
 603    begin
 604       if X.Id = Null_Id then
 605          raise Constraint_Error;
 606       end if;
 607
 608       return Exception_Data.Exception_Information (X);
 609    end Exception_Information;
 610
 611    -----------------------
 612    -- Exception_Message --
 613    -----------------------
 614
 615    function Exception_Message (X : Exception_Occurrence) return String is
 616    begin
 617       if X.Id = Null_Id then
 618          raise Constraint_Error;
 619       end if;
 620
 621       return X.Msg (1 .. X.Msg_Length);
 622    end Exception_Message;
 623
 624    --------------------
 625    -- Exception_Name --
 626    --------------------
 627
 628    function Exception_Name (Id : Exception_Id) return String is
 629    begin
 630       if Id = null then
 631          raise Constraint_Error;
 632       end if;
 633
 634       return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1);
 635    end Exception_Name;
 636
 637    function Exception_Name (X : Exception_Occurrence) return String is
 638    begin
 639       return Exception_Name (X.Id);
 640    end Exception_Name;
 641
 642    ---------------------------
 643    -- Exception_Name_Simple --
 644    ---------------------------
 645
 646    function Exception_Name_Simple (X : Exception_Occurrence) return String is
 647       Name : constant String := Exception_Name (X);
 648       P    : Natural;
 649
 650    begin
 651       P := Name'Length;
 652       while P > 1 loop
 653          exit when Name (P - 1) = '.';
 654          P := P - 1;
 655       end loop;
 656
 657       --  Return result making sure lower bound is 1
 658
 659       declare
 660          subtype Rname is String (1 .. Name'Length - P + 1);
 661       begin
 662          return Rname (Name (P .. Name'Length));
 663       end;
 664    end Exception_Name_Simple;
 665
 666    --------------------
 667    -- Exception_Data --
 668    --------------------
 669
 670    package body Exception_Data is separate;
 671    --  This package can be easily dummied out if we do not want the basic
 672    --  support for exception messages (such as in Ada 83).
 673
 674    package body Exception_Propagation is
 675
 676       procedure Setup_Exception
 677         (Excep    : EOA;
 678          Current  : EOA;
 679          Reraised : Boolean := False)
 680       is
 681          pragma Warnings (Off, Excep);
 682          pragma Warnings (Off, Current);
 683          pragma Warnings (Off, Reraised);
 684       begin
 685          null;
 686       end Setup_Exception;
 687
 688    end Exception_Propagation;
 689
 690    ----------------------
 691    -- Exception_Traces --
 692    ----------------------
 693
 694    package body Exception_Traces is separate;
 695    --  Depending on the underlying support for IO the implementation will
 696    --  differ. Moreover we would like to dummy out this package in case we do
 697    --  not want any exception tracing support. This is why this package is
 698    --  separated.
 699
 700    -----------------------
 701    -- Stream Attributes --
 702    -----------------------
 703
 704    package body Stream_Attributes is separate;
 705    --  This package can be easily dummied out if we do not want the
 706    --  support for streaming Exception_Ids and Exception_Occurrences.
 707
 708    -----------------------------
 709    -- Process_Raise_Exception --
 710    -----------------------------
 711
 712    procedure Process_Raise_Exception (E : Exception_Id) is
 713       pragma Inspection_Point (E);
 714       --  This is so the debugger can reliably inspect the parameter
 715
 716       Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all;
 717       Excep       : constant EOA := Get_Current_Excep.all;
 718
 719       procedure builtin_longjmp (buffer : Address; Flag : Integer);
 720       pragma No_Return (builtin_longjmp);
 721       pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp");
 722
 723    begin
 724       --  WARNING: There should be no exception handler for this body because
 725       --  this would cause gigi to prepend a setup for a new jmpbuf to the
 726       --  sequence of statements in case of built-in sjljl. We would then
 727       --  always get this new buf in Jumpbuf_Ptr instead of the one for the
 728       --  exception we are handling, which would completely break the whole
 729       --  design of this procedure.
 730
 731       --  If the jump buffer pointer is non-null, transfer control using it.
 732       --  Otherwise announce an unhandled exception (note that this means that
 733       --  we have no finalizations to do other than at the outer level).
 734       --  Perform the necessary notification tasks in both cases.
 735
 736       if Jumpbuf_Ptr /= Null_Address then
 737          if not Excep.Exception_Raised then
 738             Excep.Exception_Raised := True;
 739             Exception_Traces.Notify_Handled_Exception;
 740          end if;
 741
 742          builtin_longjmp (Jumpbuf_Ptr, 1);
 743
 744       else
 745          Exception_Traces.Notify_Unhandled_Exception;
 746          Exception_Traces.Unhandled_Exception_Terminate;
 747       end if;
 748    end Process_Raise_Exception;
 749
 750    ----------------------------
 751    -- Raise_Constraint_Error --
 752    ----------------------------
 753
 754    procedure Raise_Constraint_Error
 755      (File : System.Address;
 756       Line : Integer)
 757    is
 758    begin
 759       Raise_With_Location_And_Msg
 760         (Constraint_Error_Def'Access, File, Line);
 761    end Raise_Constraint_Error;
 762
 763    --------------------------------
 764    -- Raise_Constraint_Error_Msg --
 765    --------------------------------
 766
 767    procedure Raise_Constraint_Error_Msg
 768      (File : System.Address;
 769       Line : Integer;
 770       Msg  : System.Address)
 771    is
 772    begin
 773       Raise_With_Location_And_Msg
 774         (Constraint_Error_Def'Access, File, Line, Msg);
 775    end Raise_Constraint_Error_Msg;
 776
 777    -------------------------
 778    -- Raise_Current_Excep --
 779    -------------------------
 780
 781    procedure Raise_Current_Excep (E : Exception_Id) is
 782
 783       pragma Inspection_Point (E);
 784       --  This is so the debugger can reliably inspect the parameter when
 785       --  inserting a breakpoint at the start of this procedure.
 786
 787       Id : Exception_Id := E;
 788       pragma Volatile (Id);
 789       pragma Warnings (Off, Id);
 790       --  In order to provide support for breakpoints on unhandled exceptions,
 791       --  the debugger will also need to be able to inspect the value of E from
 792       --  another (inner) frame. So we need to make sure that if E is passed in
 793       --  a register, its value is also spilled on stack. For this, we store
 794       --  the parameter value in a local variable, and add a pragma Volatile to
 795       --  make sure it is spilled. The pragma Warnings (Off) is needed because
 796       --  the compiler knows that Id is not referenced and that this use of
 797       --  pragma Volatile is peculiar!
 798
 799    begin
 800       Debug_Raise_Exception (E => SSL.Exception_Data_Ptr (E));
 801       Process_Raise_Exception (E);
 802    end Raise_Current_Excep;
 803
 804    ---------------------
 805    -- Raise_Exception --
 806    ---------------------
 807
 808    procedure Raise_Exception
 809      (E       : Exception_Id;
 810       Message : String := "")
 811    is
 812       EF : Exception_Id := E;
 813
 814    begin
 815       --  Raise CE if E = Null_ID (AI-446)
 816
 817       if E = null then
 818          EF := Constraint_Error'Identity;
 819       end if;
 820
 821       --  Go ahead and raise appropriate exception
 822
 823       Exception_Data.Set_Exception_Msg (EF, Message);
 824       Abort_Defer.all;
 825       Raise_Current_Excep (EF);
 826    end Raise_Exception;
 827
 828    ----------------------------
 829    -- Raise_Exception_Always --
 830    ----------------------------
 831
 832    procedure Raise_Exception_Always
 833      (E       : Exception_Id;
 834       Message : String := "")
 835    is
 836    begin
 837       Exception_Data.Set_Exception_Msg (E, Message);
 838       Abort_Defer.all;
 839       Raise_Current_Excep (E);
 840    end Raise_Exception_Always;
 841
 842    -------------------------------------
 843    -- Raise_From_Controlled_Operation --
 844    -------------------------------------
 845
 846    procedure Raise_From_Controlled_Operation
 847      (X : Ada.Exceptions.Exception_Occurrence)
 848    is
 849       Prefix   : constant String := "adjust/finalize raised ";
 850       Orig_Msg : constant String := Exception_Message (X);
 851       New_Msg  : constant String := Prefix & Exception_Name (X);
 852
 853    begin
 854       if Orig_Msg'Length >= Prefix'Length
 855         and then
 856           Orig_Msg (Orig_Msg'First .. Orig_Msg'First + Prefix'Length - 1) =
 857                                                                      Prefix
 858       then
 859          --  Message already has proper prefix, just re-reraise PROGRAM_ERROR
 860
 861          Raise_Exception_No_Defer
 862            (E       => Program_Error'Identity,
 863             Message => Orig_Msg);
 864
 865       elsif Orig_Msg = "" then
 866
 867          --  No message present: just provide our own
 868
 869          Raise_Exception_No_Defer
 870            (E       => Program_Error'Identity,
 871             Message => New_Msg);
 872
 873       else
 874          --  Message present, add informational prefix
 875
 876          Raise_Exception_No_Defer
 877            (E       => Program_Error'Identity,
 878             Message => New_Msg & ": " & Orig_Msg);
 879       end if;
 880    end Raise_From_Controlled_Operation;
 881
 882    -------------------------------
 883    -- Raise_From_Signal_Handler --
 884    -------------------------------
 885
 886    procedure Raise_From_Signal_Handler
 887      (E : Exception_Id;
 888       M : System.Address)
 889    is
 890    begin
 891       Exception_Data.Set_Exception_C_Msg (E, M);
 892       Abort_Defer.all;
 893       Process_Raise_Exception (E);
 894    end Raise_From_Signal_Handler;
 895
 896    -------------------------
 897    -- Raise_Program_Error --
 898    -------------------------
 899
 900    procedure Raise_Program_Error
 901      (File : System.Address;
 902       Line : Integer)
 903    is
 904    begin
 905       Raise_With_Location_And_Msg
 906         (Program_Error_Def'Access, File, Line);
 907    end Raise_Program_Error;
 908
 909    -----------------------------
 910    -- Raise_Program_Error_Msg --
 911    -----------------------------
 912
 913    procedure Raise_Program_Error_Msg
 914      (File : System.Address;
 915       Line : Integer;
 916       Msg  : System.Address)
 917    is
 918    begin
 919       Raise_With_Location_And_Msg
 920         (Program_Error_Def'Access, File, Line, Msg);
 921    end Raise_Program_Error_Msg;
 922
 923    -------------------------
 924    -- Raise_Storage_Error --
 925    -------------------------
 926
 927    procedure Raise_Storage_Error
 928      (File : System.Address;
 929       Line : Integer)
 930    is
 931    begin
 932       Raise_With_Location_And_Msg
 933         (Storage_Error_Def'Access, File, Line);
 934    end Raise_Storage_Error;
 935
 936    -----------------------------
 937    -- Raise_Storage_Error_Msg --
 938    -----------------------------
 939
 940    procedure Raise_Storage_Error_Msg
 941      (File : System.Address;
 942       Line : Integer;
 943       Msg  : System.Address)
 944    is
 945    begin
 946       Raise_With_Location_And_Msg
 947         (Storage_Error_Def'Access, File, Line, Msg);
 948    end Raise_Storage_Error_Msg;
 949
 950    ---------------------------------
 951    -- Raise_With_Location_And_Msg --
 952    ---------------------------------
 953
 954    procedure Raise_With_Location_And_Msg
 955      (E : Exception_Id;
 956       F : System.Address;
 957       L : Integer;
 958       M : System.Address := System.Null_Address)
 959    is
 960    begin
 961       Exception_Data.Set_Exception_C_Msg (E, F, L, M);
 962       Abort_Defer.all;
 963       Raise_Current_Excep (E);
 964    end Raise_With_Location_And_Msg;
 965
 966    --------------------
 967    -- Raise_With_Msg --
 968    --------------------
 969
 970    procedure Raise_With_Msg (E : Exception_Id) is
 971       Excep : constant EOA := Get_Current_Excep.all;
 972
 973    begin
 974       Excep.Exception_Raised := False;
 975       Excep.Id               := E;
 976       Excep.Num_Tracebacks   := 0;
 977       Excep.Cleanup_Flag     := False;
 978       Excep.Pid              := Local_Partition_ID;
 979       Abort_Defer.all;
 980       Raise_Current_Excep (E);
 981    end Raise_With_Msg;
 982
 983    --------------------------------------
 984    -- Calls to Run-Time Check Routines --
 985    --------------------------------------
 986
 987    procedure Rcheck_00 (File : System.Address; Line : Integer) is
 988    begin
 989       Raise_Constraint_Error_Msg (File, Line, Rmsg_00'Address);
 990    end Rcheck_00;
 991
 992    procedure Rcheck_01 (File : System.Address; Line : Integer) is
 993    begin
 994       Raise_Constraint_Error_Msg (File, Line, Rmsg_01'Address);
 995    end Rcheck_01;
 996
 997    procedure Rcheck_02 (File : System.Address; Line : Integer) is
 998    begin
 999       Raise_Constraint_Error_Msg (File, Line, Rmsg_02'Address);
1000    end Rcheck_02;
1001
1002    procedure Rcheck_03 (File : System.Address; Line : Integer) is
1003    begin
1004       Raise_Constraint_Error_Msg (File, Line, Rmsg_03'Address);
1005    end Rcheck_03;
1006
1007    procedure Rcheck_04 (File : System.Address; Line : Integer) is
1008    begin
1009       Raise_Constraint_Error_Msg (File, Line, Rmsg_04'Address);
1010    end Rcheck_04;
1011
1012    procedure Rcheck_05 (File : System.Address; Line : Integer) is
1013    begin
1014       Raise_Constraint_Error_Msg (File, Line, Rmsg_05'Address);
1015    end Rcheck_05;
1016
1017    procedure Rcheck_06 (File : System.Address; Line : Integer) is
1018    begin
1019       Raise_Constraint_Error_Msg (File, Line, Rmsg_06'Address);
1020    end Rcheck_06;
1021
1022    procedure Rcheck_07 (File : System.Address; Line : Integer) is
1023    begin
1024       Raise_Constraint_Error_Msg (File, Line, Rmsg_07'Address);
1025    end Rcheck_07;
1026
1027    procedure Rcheck_08 (File : System.Address; Line : Integer) is
1028    begin
1029       Raise_Constraint_Error_Msg (File, Line, Rmsg_08'Address);
1030    end Rcheck_08;
1031
1032    procedure Rcheck_09 (File : System.Address; Line : Integer) is
1033    begin
1034       Raise_Constraint_Error_Msg (File, Line, Rmsg_09'Address);
1035    end Rcheck_09;
1036
1037    procedure Rcheck_10 (File : System.Address; Line : Integer) is
1038    begin
1039       Raise_Constraint_Error_Msg (File, Line, Rmsg_10'Address);
1040    end Rcheck_10;
1041
1042    procedure Rcheck_11 (File : System.Address; Line : Integer) is
1043    begin
1044       Raise_Constraint_Error_Msg (File, Line, Rmsg_11'Address);
1045    end Rcheck_11;
1046
1047    procedure Rcheck_12 (File : System.Address; Line : Integer) is
1048    begin
1049       Raise_Constraint_Error_Msg (File, Line, Rmsg_12'Address);
1050    end Rcheck_12;
1051
1052    procedure Rcheck_13 (File : System.Address; Line : Integer) is
1053    begin
1054       Raise_Constraint_Error_Msg (File, Line, Rmsg_13'Address);
1055    end Rcheck_13;
1056
1057    procedure Rcheck_14 (File : System.Address; Line : Integer) is
1058    begin
1059       Raise_Program_Error_Msg (File, Line, Rmsg_14'Address);
1060    end Rcheck_14;
1061
1062    procedure Rcheck_15 (File : System.Address; Line : Integer) is
1063    begin
1064       Raise_Program_Error_Msg (File, Line, Rmsg_15'Address);
1065    end Rcheck_15;
1066
1067    procedure Rcheck_16 (File : System.Address; Line : Integer) is
1068    begin
1069       Raise_Program_Error_Msg (File, Line, Rmsg_16'Address);
1070    end Rcheck_16;
1071
1072    procedure Rcheck_17 (File : System.Address; Line : Integer) is
1073    begin
1074       Raise_Program_Error_Msg (File, Line, Rmsg_17'Address);
1075    end Rcheck_17;
1076
1077    procedure Rcheck_18 (File : System.Address; Line : Integer) is
1078    begin
1079       Raise_Program_Error_Msg (File, Line, Rmsg_18'Address);
1080    end Rcheck_18;
1081
1082    procedure Rcheck_19 (File : System.Address; Line : Integer) is
1083    begin
1084       Raise_Program_Error_Msg (File, Line, Rmsg_19'Address);
1085    end Rcheck_19;
1086
1087    procedure Rcheck_20 (File : System.Address; Line : Integer) is
1088    begin
1089       Raise_Program_Error_Msg (File, Line, Rmsg_20'Address);
1090    end Rcheck_20;
1091
1092    procedure Rcheck_21 (File : System.Address; Line : Integer) is
1093    begin
1094       Raise_Program_Error_Msg (File, Line, Rmsg_21'Address);
1095    end Rcheck_21;
1096
1097    procedure Rcheck_22 (File : System.Address; Line : Integer) is
1098    begin
1099       Raise_Program_Error_Msg (File, Line, Rmsg_22'Address);
1100    end Rcheck_22;
1101
1102    procedure Rcheck_23 (File : System.Address; Line : Integer) is
1103    begin
1104       Raise_Program_Error_Msg (File, Line, Rmsg_23'Address);
1105    end Rcheck_23;
1106
1107    procedure Rcheck_24 (File : System.Address; Line : Integer) is
1108    begin
1109       Raise_Program_Error_Msg (File, Line, Rmsg_24'Address);
1110    end Rcheck_24;
1111
1112    procedure Rcheck_25 (File : System.Address; Line : Integer) is
1113    begin
1114       Raise_Program_Error_Msg (File, Line, Rmsg_25'Address);
1115    end Rcheck_25;
1116
1117    procedure Rcheck_26 (File : System.Address; Line : Integer) is
1118    begin
1119       Raise_Program_Error_Msg (File, Line, Rmsg_26'Address);
1120    end Rcheck_26;
1121
1122    procedure Rcheck_27 (File : System.Address; Line : Integer) is
1123    begin
1124       Raise_Program_Error_Msg (File, Line, Rmsg_27'Address);
1125    end Rcheck_27;
1126
1127    procedure Rcheck_28 (File : System.Address; Line : Integer) is
1128    begin
1129       Raise_Program_Error_Msg (File, Line, Rmsg_28'Address);
1130    end Rcheck_28;
1131
1132    procedure Rcheck_29 (File : System.Address; Line : Integer) is
1133    begin
1134       Raise_Program_Error_Msg (File, Line, Rmsg_29'Address);
1135    end Rcheck_29;
1136
1137    procedure Rcheck_30 (File : System.Address; Line : Integer) is
1138    begin
1139       Raise_Storage_Error_Msg (File, Line, Rmsg_30'Address);
1140    end Rcheck_30;
1141
1142    procedure Rcheck_31 (File : System.Address; Line : Integer) is
1143    begin
1144       Raise_Storage_Error_Msg (File, Line, Rmsg_31'Address);
1145    end Rcheck_31;
1146
1147    procedure Rcheck_32 (File : System.Address; Line : Integer) is
1148    begin
1149       Raise_Storage_Error_Msg (File, Line, Rmsg_32'Address);
1150    end Rcheck_32;
1151
1152    procedure Rcheck_33 (File : System.Address; Line : Integer) is
1153    begin
1154       Raise_Storage_Error_Msg (File, Line, Rmsg_33'Address);
1155    end Rcheck_33;
1156
1157    -------------
1158    -- Reraise --
1159    -------------
1160
1161    procedure Reraise is
1162       Excep : constant EOA := Get_Current_Excep.all;
1163
1164    begin
1165       Abort_Defer.all;
1166       Raise_Current_Excep (Excep.Id);
1167    end Reraise;
1168
1169    ------------------------
1170    -- Reraise_Occurrence --
1171    ------------------------
1172
1173    procedure Reraise_Occurrence (X : Exception_Occurrence) is
1174    begin
1175       if X.Id /= null then
1176          Abort_Defer.all;
1177          Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1178          Raise_Current_Excep (X.Id);
1179       end if;
1180    end Reraise_Occurrence;
1181
1182    -------------------------------
1183    -- Reraise_Occurrence_Always --
1184    -------------------------------
1185
1186    procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is
1187    begin
1188       Abort_Defer.all;
1189       Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1190       Raise_Current_Excep (X.Id);
1191    end Reraise_Occurrence_Always;
1192
1193    ---------------------------------
1194    -- Reraise_Occurrence_No_Defer --
1195    ---------------------------------
1196
1197    procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is
1198    begin
1199       Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
1200       Raise_Current_Excep (X.Id);
1201    end Reraise_Occurrence_No_Defer;
1202
1203    ---------------------
1204    -- Save_Occurrence --
1205    ---------------------
1206
1207    procedure Save_Occurrence
1208      (Target : out Exception_Occurrence;
1209       Source : Exception_Occurrence)
1210    is
1211    begin
1212       Save_Occurrence_No_Private (Target, Source);
1213    end Save_Occurrence;
1214
1215    function Save_Occurrence (Source : Exception_Occurrence) return EOA is
1216       Target : constant EOA := new Exception_Occurrence;
1217    begin
1218       Save_Occurrence (Target.all, Source);
1219       return Target;
1220    end Save_Occurrence;
1221
1222    --------------------------------
1223    -- Save_Occurrence_No_Private --
1224    --------------------------------
1225
1226    procedure Save_Occurrence_No_Private
1227      (Target : out Exception_Occurrence;
1228       Source : Exception_Occurrence)
1229    is
1230    begin
1231       Target.Id             := Source.Id;
1232       Target.Msg_Length     := Source.Msg_Length;
1233       Target.Num_Tracebacks := Source.Num_Tracebacks;
1234       Target.Pid            := Source.Pid;
1235       Target.Cleanup_Flag   := Source.Cleanup_Flag;
1236
1237       Target.Msg (1 .. Target.Msg_Length) :=
1238         Source.Msg (1 .. Target.Msg_Length);
1239
1240       Target.Tracebacks (1 .. Target.Num_Tracebacks) :=
1241         Source.Tracebacks (1 .. Target.Num_Tracebacks);
1242    end Save_Occurrence_No_Private;
1243
1244    -------------------------
1245    -- Transfer_Occurrence --
1246    -------------------------
1247
1248    procedure Transfer_Occurrence
1249      (Target : Exception_Occurrence_Access;
1250       Source : Exception_Occurrence)
1251    is
1252    begin
1253       --  Setup Target as an exception to be propagated in the calling task
1254       --  (rendezvous-wise), taking care not to clobber the associated private
1255       --  data. Target is expected to be a pointer to the calling task's fixed
1256       --  TSD occurrence, which is very different from Get_Current_Excep here
1257       --  because this subprogram is called from the called task.
1258
1259       Save_Occurrence_No_Private (Target.all, Source);
1260    end Transfer_Occurrence;
1261
1262    -------------------
1263    -- String_To_EId --
1264    -------------------
1265
1266    function String_To_EId (S : String) return Exception_Id
1267      renames Stream_Attributes.String_To_EId;
1268
1269    ------------------
1270    -- String_To_EO --
1271    ------------------
1272
1273    function String_To_EO (S : String) return Exception_Occurrence
1274      renames Stream_Attributes.String_To_EO;
1275
1276    ------------------------------
1277    -- Raise_Exception_No_Defer --
1278    ------------------------------
1279
1280    procedure Raise_Exception_No_Defer
1281      (E       : Exception_Id;
1282       Message : String := "")
1283    is
1284    begin
1285       Exception_Data.Set_Exception_Msg (E, Message);
1286
1287       --  Do not call Abort_Defer.all, as specified by the spec
1288
1289       Raise_Current_Excep (E);
1290    end Raise_Exception_No_Defer;
1291
1292    ---------------
1293    -- To_Stderr --
1294    ---------------
1295
1296    procedure To_Stderr (C : Character) is
1297       type int is new Integer;
1298
1299       procedure put_char_stderr (C : int);
1300       pragma Import (C, put_char_stderr, "put_char_stderr");
1301
1302    begin
1303       put_char_stderr (Character'Pos (C));
1304    end To_Stderr;
1305
1306    procedure To_Stderr (S : String) is
1307    begin
1308       for J in S'Range loop
1309          if S (J) /= ASCII.CR then
1310             To_Stderr (S (J));
1311          end if;
1312       end loop;
1313    end To_Stderr;
1314
1315 end Ada.Exceptions;