Re: DDD 3.3.11 (i686-apple-darwin9.1.0) gets `Bus error' signal

[Roger Mc Murtrie]

Problem appears to be caused by GetFileDatabase of file ddd.C being called with the filename of a non-existent file.

filename of non-existant file: /Users/Roger/.ddd/init

(/Users/Roger/.ddd contains init#, log, sessions and themes all dated three days ago)

Result is null for the GetFileDatabase instruction: 

std::ifstream is(filename.chars());

When attempt is made to access is, crash  occurs (particularly for is.close).

I suggest that GetFileDatabase should check for filename of a non-existent file and take appropriate action.

I will now try and find out why GetFileDatabase is being called for a non-existent file, or why /Users/Roger/.ddd/init doesn't exist.

Roger

On 25/12/2007, at 12:37 AM, Roger Mc Murtrie wrote:

Backtrace for gdb result of setting breakpoint at malloc_error_break:

(gdb) b malloc_error_break

Breakpoint 1 at 0xe69ee

(gdb) run

Starting program: /Users/Roger/Downloads/ddd-3.3.11/ddd/ddd 

Reading symbols for shared libraries ++++++++++++++++++++++.................................................... done

Breakpoint 1 at 0x939099f1

ddd(97245) malloc: *** error for object 0xfffffe: Non-aligned pointer being freed

*** set a breakpoint in malloc_error_break to debug

Breakpoint 1, 0x939099f1 in malloc_error_break ()

(gdb) bt

#0  0x939099f1 in malloc_error_break ()

#1  0x939049df in szone_error ()

#2  0x93829b83 in szone_free ()

#3  0x938299ed in free ()

#4  0x9385bc7a in fclose ()

#5  0x00a0b635 in std::__basic_file<char>::close ()

#6  0x009b9086 in std::basic_filebuf<char, std::char_traits<char> >::close ()

#7  0x00009892 in GetFileDatabase (filename=@0xbffff5a4) at ddd.C:3440

#8  0x0001fbb6 in pre_main_loop (argc=1, argv=<value temporarily unavailable, due to optimizations>) at ddd.C:2115

#9  0x00027aa8 in main (argc=0, argv=0x0) at ddd.C:3172

(gdb) 

On 24/12/2007, at 6:58 PM, Roger Mc Murtrie wrote:

Further to my previous message, I tried running ddd with the following result:

:~/Downloads/ddd-3.3.11 Roger$ddd/ddd
ddd(79830) malloc: *** error for object 0xfffffe: Non-aligned pointer being freed
*** set a breakpoint in malloc_error_break to debug

I'm not too familiar with gdb; but if I can find time, I'l try running under gdb with the recommended breakpoint to see what happens.

Regards
Roger


On 24/12/2007, at 4:48 PM, Roger Mc Murtrie wrote:

Intel Mac-mini

OS X 10.5.1 (leopard)

Xcode version 3.0

After make of DDD

Running make check produced

Making check in ddd

cat Ddd | cat | \

      /usr/bin/sed -n -f ./ad2c.sed > Ddd.ad.h~ && mv Ddd.ad.h~ Ddd.ad.h

if g++ -DHAVE_CONFIG_H -I. -I. -I.  -I./.. -isystem /usr/X11/include   -O2 -g -Wall -W -Wwrite-strings -trigraphs  -MT resources.o -MD -MP -MF ".deps/resources.Tpo" -c -o resources.o resources.C; \

      then mv -f ".deps/resources.Tpo" ".deps/resources.Po"; else rm -f ".deps/resources.Tpo"; exit 1; fi

/bin/sh ../libtool --mode=link --tag=CXX g++  -O2 -g -Wall -W -Wwrite-strings -trigraphs    -o ddd ..............

MALLOC_CHECK_=2 \

      DDD_HOME=./.. \

      XUSERFILESEARCHPATH=%N XAPPLRESDIR=. \

      ./ddd  cxxtest

Internal error (Bus error).

Oops!  You have found a bug in DDD.

Running ddd --configuration also produced Bus error.

Compiler:

i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5465)

Debugger:

GNU gdb 6.3.50-20050815 (Apple version gdb-768) (Tue Oct  2 04:07:49 UTC 2007)

This GDB was configured as "i386-apple-darwin".

cat ~/.ddd/log

GNU DDD 3.3.11 (i686-apple-darwin9.1.0)

Copyright (C) 1995-1999 Technische Universit?t Braunschweig, Germany.

Copyright (C) 1999-2001 Universit?t Passau, Germany.

Copyright (C) 2001 Universit?t des Saarlandes, Germany.

Copyright (C) 2001-2004 Free Software Foundation, Inc.

Compiled with GCC 4.0.1 (Apple Inc. build 5465)

Requires X11R6, Xt11R6, Motif 2.1 (GNU/LessTif Version 2.1 Release 0.95.0)

Includes XPM 3.4.11, Athena Panner (7000002L), DDD core

Built 2007-12-24 by Roger Mc Murtrie <Roger@Rogers-imac.local>.

$  ./ddd cxxtest

!  Bus error