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-------------------------------------------------------------------------------
--- --
--- GNAT RUN-TIME COMPONENTS --
--- --
--- S Y S T E M . T R A C E B A C K . S Y M B O L I C --
--- --
--- S p e c --
--- --
--- Copyright (C) 1999-2017, AdaCore --
--- --
--- GNAT is free software; you can redistribute it and/or modify it under --
--- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 3, or (at your option) any later ver- --
--- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
--- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
--- or FITNESS FOR A PARTICULAR PURPOSE. --
--- --
--- As a special exception under Section 7 of GPL version 3, you are granted --
--- additional permissions described in the GCC Runtime Library Exception, --
--- version 3.1, as published by the Free Software Foundation. --
--- --
--- You should have received a copy of the GNU General Public License and --
--- a copy of the GCC Runtime Library Exception along with this program; --
--- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
--- <http://www.gnu.org/licenses/>. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- Run-time symbolic traceback support
-
--- The routines provided in this package assume that your application has been
--- compiled with debugging information turned on, since this information is
--- used to build a symbolic traceback.
-
--- If you want to retrieve tracebacks from exception occurrences, it is also
--- necessary to invoke the binder with -E switch. Please refer to the gnatbind
--- documentation for more information.
-
--- Note that it is also possible (and often recommended) to compute symbolic
--- traceback outside the program execution, which in addition allows you to
--- distribute the executable with no debug info:
---
--- - build your executable with debug info
--- - archive this executable
--- - strip a copy of the executable and distribute/deploy this version
--- - at run time, compute absolute traceback (-bargs -E) from your
--- executable and log it using Ada.Exceptions.Exception_Information
--- - off line, compute the symbolic traceback using the executable archived
--- with debug info and addr2line or gdb (using info line *<addr>) on the
--- absolute addresses logged by your application.
-
--- In order to retrieve symbolic information, functions in this package will
--- read on disk all the debug information of the executable file (found via
--- Argument (0), and looked in the PATH if needed) or shared libraries using
--- OS facilities, and load them in memory, causing a significant cpu and
--- memory overhead.
-
-pragma Polling (Off);
--- We must turn polling off for this unit, because otherwise we can get
--- elaboration circularities when polling is turned on.
-
-with Ada.Exceptions;
-
-package System.Traceback.Symbolic is
- pragma Elaborate_Body;
-
- function Symbolic_Traceback
- (Traceback : System.Traceback_Entries.Tracebacks_Array) return String;
- function Symbolic_Traceback_No_Hex
- (Traceback : System.Traceback_Entries.Tracebacks_Array) return String;
- -- Build a string containing a symbolic traceback of the given call
- -- chain. Note: These procedures may be installed by Set_Trace_Decorator,
- -- to get a symbolic traceback on all exceptions raised (see
- -- System.Exception_Traces).
-
- function Symbolic_Traceback
- (E : Ada.Exceptions.Exception_Occurrence) return String;
- function Symbolic_Traceback_No_Hex
- (E : Ada.Exceptions.Exception_Occurrence) return String;
- -- Build string containing symbolic traceback of given exception occurrence
-
- -- In the above, _No_Hex means do not print any hexadecimal addresses, even
- -- if the symbol is not available. This is useful for getting deterministic
- -- output from tests.
-
- procedure Enable_Cache (Include_Modules : Boolean := False);
- -- Read symbolic information from binary files and cache them in memory.
- -- This will speed up the above functions but will require more memory. If
- -- Include_Modules is true, shared modules (or DLL) will also be cached.
- -- This procedure may do nothing if not supported. The profile of this
- -- subprogram may change in the future (new parameters can be added
- -- with default value), but backward compatibility for direct calls
- -- is supported.
-
-end System.Traceback.Symbolic;