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-
-
-
- Trap V2.4 - the TrapHandler
- Written 1992 by Tobias Abt and Alexander Kneer
- © 1992 by the same party
- This program is FreeWare !
-
-
- DISCLAIMER:
- -----------
- We, the programmers, are in no way responsible of what Trap may do to
- your system, so don't blame us for loosing your unsaved but precious
- works due to inconveniences, although it runs safe on many systems.
- Trap has been tested on these configurations:
- standard A500,
- A1000 with 5MB RAM,
- standard A2000,
- A2000 with 68030 accelerator board, 5MB RAM,
- A2000 with 68040 accelerator board, 12MB RAM,
- A3000 with 4-18MB RAM.
- No specific errors occured using these systems, so we think it is quite
- safe to use.
-
-
- OVERVIEW:
- ---------
-
- What is Trap?
- - it is short,
- - it is a utility,
- - it can be runned from CLI or WorkBench,
- - it is designed to catch system exceptions and display a requester
- on the frontmost screen, allowing you to either suspend or remove
- the crashed process or reboot the system,
- - it displays the CPU registers, allowing you to take a deeper look
- on what went wrong, thus being a big help developing software ;-),
- - it can be removed at any time,
- - it doesn't override a private traphandler attached to a
- task/process.
-
- - enforcer reported no hits using Trap.
-
-
- REQUIREMENTS:
- -------------
-
- Amiga with at least a few KBytes RAM left,
- Kick 2.04 (V37) (you don't have it? buy and install!)
-
-
-
- INSTALLATION:
- -------------
-
- Place Trap anywhere, call it in the S:User-Startup or
- put it in SYS:WBStartup.
-
-
- TECHNICAL:
- ----------
-
- Trap patches the Exec AddTask routine to install itself as the default
- traphandler. It also patches the existing tasks and processes if the
- default exec traphandler is installed to ensure that these also benefit
- from Trap.
- If started again it checks first if it can be removed safely i.e. if no
- one else has patched in front of Trap. If this is not the case, it will
- only be deactivated waiting for reactivation.
-
- Trap is visible to other programs due to its public message port named
- Traphandler. But don't try to send messages to that port - they won't be
- processed and are lost until reboot.
-
- If a system exception occures, trap displays the CPU registers in a
- EasyRequest with three possible actions to be taken:
- Suspend, Remove or Reboot.
-
- If Suspend or Reboot is choosen, the same as with the standard system
- requester happens: the task or process is suspended or the system will
- be rebooted.
- But if you happen to select Remove, Trap will close all windows with the
- mp_SigTask of the wd_UserPort or wd_WindowPort set to the crashed task
- or process and then it will attempt to close the screen.
- After that, the stdout and stdin of the task will be closed, the current
- directory is unlocked and the task structure with attached memory is
- removed and freed, trying to return as much memory as possible to the
- system.
-
-
- KNOWN BUGS:
- -----------
-
- None yet ;^)
-
- DISTRIBUTION:
- -------------
-
- Trap may be included with commercial programs as long as no money
- is made by including it in the distribution (this also applies to
- inclusion in AmigaDOS Enhancer kits, on Workbench/Extras disks or
- A3x00 hard disk drives).
- You must not make any money by distributing Trap. A small copy fee
- for data media (3$ US maximum) or the inclusion of Trap in
- Public-Domain collections such as Fred Fish's Amiga Library of Freely
- Distributable Software is permitted though.
-
-
- BUG REPORTS and SUGGESTIONS:
- ----------------------------
-
- Send your bug reports (what went wrong and why and where and on which
- hardware configuration) to:
-
-
- Tobias Abt Alexander Kneer
- or
- Bessererstr. 9 Schubertstr. 35
- W7900 Ulm W7910 Neu-Ulm
- Germany Germany
-
- No EMail addresses yet, sorry.
-
-
-
- BY THE WAY:
- -----------
-
- Positive feedback is also accepted by us. You know the tale about rich
- students?
-