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Article #990

3.0 gdb does not work?

#990
From: Miron Cuperman
Date: Sat, 12 Sep 1992 09:27
46 lines
1895 bytes
When I try to run gdb, it fails to even create the child process.
For example, trying gdb on /bin/cat:

------------------------
% gdb -nx /bin/cat
Reading symbol data from /bin/cat...
(no debugging symbols found)...done.
Reading symbol data from /usr/shlib/libsys_s.B.shlib...done.
(gdb) b abort
Breakpoint 1 at 0x505358a
(gdb) run
Starting program: /bin/cat 
Program generated(1): Memory access exception on address 0x7d6f8 (invalid address).
Program generated(1): Memory access exception on address 0x7d6f8 (invalid address).
Program generated(1): Memory access exception on address 0x7d6f8 (invalid address).
Program generated(1): Memory access exception on address 0x7d6f8 (invalid address).
Program generated(1): Memory access exception on address 0x7d6f8 (invalid address).
^CProgram generated(1): Memory access exception on address 0x7d6f8 (invalid address).
Quit
0x501e7fa in _cproc_fork_child ()
(gdb) bt
#0  0x501e7fa in _cproc_fork_child ()
#1  0x502e444 in _cthread_fork_child ()
#2  0x5008544 in fork ()
#3  0x2ff2e in ?? ()
#4  0x1b83e in ?? ()
#5  0x3bea in ?? ()
#6  0x25d30 in ?? ()
#7  0x3cb8 in ?? ()
#8  0x3a78 in ?? ()
(gdb) 
------------------------

The ps output:
  568 p1 SW    0:01 gdb -nx /bin/cat
  569 p1 HW    0:00 gdb -nx /bin/cat

Attaching to a running process works fine.

Anybody know what is going on?
-- 
	Miron Cuperman <miron@extropia.wimsey.bc.ca>	(NeXTmail ok)
		       <miron@cs.sfu.ca>
	AMIX: MCuperman

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Message-ID: <1992Sep12.092712.706@extropia.wimsey.bc.ca>
Path: arc1-ca.pugleaf.net!sparky!uunet!van-bc!extropia.wimsey.bc.ca!miron

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Newsgroups: comp.sys.next.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!van-bc!extropia.wimsey.bc.ca!miron
From: miron@extropia.wimsey.bc.ca (Miron Cuperman)
Subject: 3.0 gdb does not work?
Message-ID: <1992Sep12.092712.706@extropia.wimsey.bc.ca>
Summary: it doesn't fork
Keywords: gdb
Organization: Immortal Freedom's Deck
Date: Sat, 12 Sep 1992 09:27:12 GMT
Lines: 46