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Diffstat (limited to 'gcc/ada/s-traceb.adb')
| -rw-r--r-- | gcc/ada/s-traceb.adb | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/gcc/ada/s-traceb.adb b/gcc/ada/s-traceb.adb new file mode 100644 index 000000000..d4de95d7e --- /dev/null +++ b/gcc/ada/s-traceb.adb @@ -0,0 +1,93 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . T R A C E B A C K -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1999-2009, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is the default version of this package + +-- Note: this unit must be compiled using -fno-optimize-sibling-calls. +-- See comment below in body of Call_Chain for details on the reason. + +pragma Compiler_Unit; + +package body System.Traceback is + + ------------------ + -- C_Call_Chain -- + ------------------ + + function C_Call_Chain + (Traceback : System.Address; + Max_Len : Natural) + return Natural + is + Val : Natural; + + begin + Call_Chain (Traceback, Max_Len, Val); + return Val; + end C_Call_Chain; + + ---------------- + -- Call_Chain -- + ---------------- + + function Backtrace + (Traceback : System.Address; + Len : Integer; + Exclude_Min : System.Address; + Exclude_Max : System.Address; + Skip_Frames : Integer) + return Integer; + pragma Import (C, Backtrace, "__gnat_backtrace"); + + procedure Call_Chain + (Traceback : System.Address; + Max_Len : Natural; + Len : out Natural; + Exclude_Min : System.Address := System.Null_Address; + Exclude_Max : System.Address := System.Null_Address; + Skip_Frames : Natural := 1) + is + begin + -- Note: Backtrace relies on the following call actually creating a + -- stack frame. To ensure that this is the case, it is essential to + -- compile this unit without sibling call optimization. + + -- We want the underlying engine to skip its own frame plus the + -- ones we have been requested to skip ourselves. + + Len := Backtrace (Traceback => Traceback, + Len => Max_Len, + Exclude_Min => Exclude_Min, + Exclude_Max => Exclude_Max, + Skip_Frames => Skip_Frames + 1); + end Call_Chain; + +end System.Traceback; |