projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| cacbc350 RK |
1 | ------------------------------------------------------------------------------ |
| 2 | -- -- | |
| 3 | -- GNAT COMPILER COMPONENTS -- | |
| 4 | -- -- | |
| 5 | -- S Y S T E M . T R A C E B A C K -- | |
| 6 | -- -- | |
| 7 | -- S p e c -- | |
| 8 | -- -- | |
| fbf5a39b | 9 | -- Copyright (C) 1999-2003 Free Software Foundation, Inc. -- |
| cacbc350 RK |
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, 59 Temple Place - Suite 330, Boston, -- | |
| 20 | -- MA 02111-1307, 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. -- | |
| 1f02b6af | 30 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| cacbc350 RK |
31 | -- -- |
| 32 | ------------------------------------------------------------------------------ | |
| 33 | ||
| 34 | -- This package provides a method for generating a traceback of the | |
| 35 | -- current execution location. The traceback shows the locations of | |
| 36 | -- calls in the call chain, up to either the top or a designated | |
| 37 | -- number of levels. | |
| 38 | ||
| 39 | pragma Polling (Off); | |
| 40 | -- We must turn polling off for this unit, because otherwise we get | |
| 41 | -- elaboration circularities with System.Exception_Tables. | |
| 42 | ||
| 43 | package System.Traceback is | |
| 44 | ||
| 45 | ---------------- | |
| 46 | -- Call_Chain -- | |
| 47 | ---------------- | |
| 48 | ||
| 49 | procedure Call_Chain | |
| 50 | (Traceback : System.Address; | |
| 51 | Max_Len : Natural; | |
| 52 | Len : out Natural; | |
| 53 | Exclude_Min : System.Address := System.Null_Address; | |
| fbf5a39b AC |
54 | Exclude_Max : System.Address := System.Null_Address; |
| 55 | Skip_Frames : Natural := 1); | |
| cacbc350 RK |
56 | -- Store up to Max_Len code locations in Traceback, corresponding to |
| 57 | -- the current call chain. | |
| 58 | -- | |
| 59 | -- Traceback is the address of an array of addresses where the | |
| 60 | -- result will be stored. | |
| 61 | -- | |
| 62 | -- Max_Len is the length of the Traceback array. If the call chain | |
| 63 | -- is longer than this, then additional entries are discarded, and | |
| 64 | -- the traceback is missing some of the highest level entries. | |
| 65 | -- | |
| 66 | -- Len is the returned actual number of addresses stored | |
| 67 | -- in the Traceback array. | |
| 68 | -- | |
| 69 | -- Exclude_Min/Exclude_Max, if non null, provide a range of addresses | |
| 70 | -- to ignore from the computation of the traceback. | |
| 71 | -- | |
| fbf5a39b AC |
72 | -- Skip_Frames says how many of the most recent calls should at least |
| 73 | -- be excluded from the result, regardless of the exclusion bounds and | |
| 74 | -- starting with this procedure itself: 1 means exclude the frame for | |
| 75 | -- this procedure, 2 means 1 + exclude the frame for this procedure's | |
| 76 | -- caller, ... | |
| 77 | -- | |
| cacbc350 RK |
78 | -- On return, the Traceback array is filled in, and Len indicates |
| 79 | -- the number of stored entries. The first entry is the most recent | |
| 80 | -- call, and the last entry is the highest level call. | |
| 81 | ||
| 82 | function C_Call_Chain | |
| 83 | (Traceback : System.Address; | |
| 84 | Max_Len : Natural) | |
| 85 | return Natural; | |
| 86 | pragma Export (C, C_Call_Chain, "system__traceback__c_call_chain"); | |
| 87 | -- Version that can be used directly from C. | |
| 88 | ||
| 89 | end System.Traceback; |