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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- C O M P E R R --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1992-2019, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 -- This package contains the routine called when a fatal internal compiler
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27 -- error is detected. Calls to this routines cause termination of the
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28 -- current compilation with appropriate error output.
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29
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30 package Comperr is
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31
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32 procedure Compiler_Abort
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33 (X : String;
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34 Fallback_Loc : String := "";
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35 From_GCC : Boolean := False);
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36 pragma No_Return (Compiler_Abort);
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37 -- Signals an internal compiler error. Never returns control. Depending on
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38 -- processing may end up raising Unrecoverable_Error, or exiting directly.
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39 -- The message output is a "bug box" containing the first string passed as
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40 -- an argument. The Sloc field of the node in Current_Error_Node is used to
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41 -- provide the location where the error should be signalled. If this Sloc
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42 -- value is set to No_Location or any of the other special location values,
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43 -- then the Fallback_Loc argument string is used instead. The message text
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44 -- includes the node id, and the code parameter if it is positive.
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45 --
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46 -- Note that this is only used at the outer level (to handle constraint
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47 -- errors or assert errors etc.) In the normal logic of the compiler we
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48 -- always use pragma Assert to check for errors, and if necessary an
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49 -- explicit abort is achieved by pragma Assert (False). From_GCC is true
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50 -- for a GCC abort and false for a front end exception (with a possible
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51 -- message stored in TSD.Current_Excep).
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52
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53 -- WARNING: There is a matching C declaration of this subprogram in fe.h
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54
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55 procedure Delete_SCIL_Files;
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56 -- Delete SCIL files associated with the main unit
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57
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58 ------------------------------
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59 -- Use of gnat_bug.box File --
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60 ------------------------------
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61
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62 -- When comperr generates the "bug box". The first two lines contain
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63 -- information on the version number, type of abort, and source location.
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64
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65 -- Normally the remaining text is one of three possible forms
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66 -- depending on Gnatvsn.Gnat_Version_Type (FSF, Public, GNATPRO).
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67 -- See body of this package for the exact text used.
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68
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69 -- In addition, an alternative mechanism exists for easily substituting
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70 -- different text for this message. Compiler_Abort checks for the
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71 -- existence of the file "gnat_bug.box" in the current source path.
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72 -- Most typically this file, if present, will be in the directory
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73 -- containing the run-time sources.
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74
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75 -- If this file is present, then it is a plain ASCII file, whose contents
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76 -- replace the remaining text. The lines in this file should be seventy-two
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77 -- characters or less to avoid misformatting the right boundary of the box.
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78 -- Note that the file does not contain the vertical bar characters or any
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79 -- leading spaces in lines.
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80
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81 end Comperr;
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