Re: c++/2412: gdb crashes with complex data

Re: c++/2412: gdb crashes with complex data

[Daniel Jacobowitz]

The following reply was made to PR c++/2412; it has been noted by GNATS.

From: Daniel Jacobowitz <drow@false.org>
To: Jim Blandy <jimb@red-bean.com>, gdb-gnats@sourceware.org
Cc:  
Subject: Re: c++/2412: gdb crashes with complex data
Date: Wed, 6 Feb 2008 22:30:35 -0500

 On Thu, Feb 07, 2008 at 02:38:01AM -0000, Jim Blandy wrote:
 >  The new test program you submitted seems to work for me as well.
 
 It probably depends on the compiler in use.
 
 -- 
 Daniel Jacobowitz
 CodeSourcery

Re: c++/2412: gdb crashes with complex data

[Jim Blandy]

The following reply was made to PR c++/2412; it has been noted by GNATS.

From: "Jim Blandy" <jimb@red-bean.com>
To: "jacob navia" <jacob@jacob.remcomp.fr>
Cc: gdb-gnats@sources.redhat.com
Subject: Re: c++/2412: gdb crashes with complex data
Date: Fri, 8 Feb 2008 08:51:46 -0800

 On Feb 7, 2008 11:09 AM, jacob navia <jacob@jacob.remcomp.fr> wrote:
 > I downloaded and installed the sources you recommended me
 > and the bug disappears.
 
 Glad to hear it!

Re: c++/2412: gdb crashes with complex data

[Greg Law]

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The following reply was made to PR c++/2412; it has been noted by GNATS.

From: Greg Law <glaw@undo-software.com>
To: jacob@jacob.remcomp.fr
Cc: gdb-gnats@sources.redhat.com
Subject: Re: c++/2412: gdb crashes with complex data
Date: Thu, 07 Feb 2008 20:12:10 +0000

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 This sounds like it could be the same issue that I reported (and 
 supplied a patch for) a few days ago.
 
 Jacob - could you try with the attached patch applied and see if it 
 solves your problem?
 
 Cheers,
 
 Greg
 
 jacob@jacob.remcomp.fr wrote:
 >> Number:         2412
 >> Category:       c++
 >> Synopsis:       gdb crashes with complex data
 >> Confidential:   no
 >> Severity:       critical
 >> Priority:       high
 >> Responsible:    unassigned
 >> State:          open
 >> Class:          sw-bug
 >> Submitter-Id:   net
 >> Arrival-Date:   Wed Feb 06 23:38:01 UTC 2008
 >> Closed-Date:
 >> Last-Modified:
 >> Originator:     Jacob Navia
 >> Release:        GNU gdb 6.7.1
 >> Organization:
 >> Environment:
 > linux
 >> Description:
 > Every time I want to display a complex number in gdb
 > it crashes.
 > 
 > Crash in
 > void
 > print_floating (const gdb_byte *valaddr, struct type *type,
 >                 struct ui_file *stream)
 > 
 > How to reproduce
 > 
 > 1) Define a long double _Complex number.
 >    For example:  long double _Complex foo = 4.8;
 > 3) In gdb type
 >    print foo
 > 
 > crash, gdb dies.
 > 
 > This is after I downloaded the latest version.
 > 
 > Machine:
 > 
 > i486 linux vanilla ubuntu distribution.
 > root@ubuntu:/tmp/gdb-6.7.1/gdb# gcc -v
 > Utilisation des specs internes.
 > Target: i486-linux-gnu
 > Configuré avec: ../src/configure -v --enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr --with-gxx-include-dir=/usr/include/c++/4.0.2 --enable-shared --with-system-zlib --libexecdir=/usr/lib --enable-nls --without-included-gettext --enable-threads=posix --program-suffix=-4.0 --enable-__cxa_atexit --enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2 .0/jre --enable-mpfr --disable-werror --enable-checking=release i486-linux-gnu
 > Modèle de thread: posix
 > version gcc 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9)
 > 
 > root@ubuntu:/tmp/gdb-6.7.1/gdb# gdb -v
 > GNU gdb 6.7.1
 > Copyright (C) 2007 Free Software Foundation, Inc.
 > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 > This is free software: you are free to change and redistribute it.
 > There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 > and "show warranty" for details.
 > This GDB was configured as "i686-pc-linux-gnu".
 >> How-To-Repeat:
 > 1) Define a long double _Complex number.
 >    For example:  long double _Complex foo = 4.8;
 > 2) In gdb type
 >    print foo
 > 
 > crash, gdb dies. 
 >> Fix:
 > 
 >> Release-Note:
 >> Audit-Trail:
 >> Unformatted:
 
 
 -- 
 Greg Law, Undo Software                       http://undo-software.com/
 
 --------------010303040502090909070606
 Content-Type: text/x-patch;
  name="regcache_fix.patch"
 Content-Transfer-Encoding: 7bit
 Content-Disposition: inline;
  filename="regcache_fix.patch"
 
 Index: gdb/regcache.c
 ===================================================================
 RCS file: /cvs/src/src/gdb/regcache.c,v
 retrieving revision 1.163
 diff -u -r1.163 regcache.c
 --- gdb/regcache.c	1 Jan 2008 22:53:12 -0000	1.163
 +++ gdb/regcache.c	4 Feb 2008 22:24:32 -0000
 @@ -472,6 +472,9 @@
    regcache_xfree (current_regcache);
    current_regcache = NULL;
  
 +  /* Need to forget about any frames we have cached, too. */
 +  reinit_frame_cache ();
 +
    /* Force cleanup of any alloca areas if using C alloca instead of
       a builtin alloca.  This particular call is used to clean up
       areas allocated by low level target code which may build up
 
 --------------010303040502090909070606--

Re: c++/2412: gdb crashes with complex data

[jacob navia]

The following reply was made to PR c++/2412; it has been noted by GNATS.

From: jacob navia <jacob@jacob.remcomp.fr>
To: Jim Blandy <jimb@red-bean.com>, gdb-gnats@sources.redhat.com
Cc:  
Subject: Re: c++/2412: gdb crashes with complex data
Date: Thu, 07 Feb 2008 20:09:47 +0100

 Hi Jim
 
 I downloaded and installed the sources you recommended me
 and the bug disappears.
 
 Thanks for your time.
 

Re: c++/2412: gdb crashes with complex data

[Jim Blandy]

The following reply was made to PR c++/2412; it has been noted by GNATS.

From: "Jim Blandy" <jimb@red-bean.com>
To: "jacob navia" <jacob@jacob.remcomp.fr>
Cc: gdb-gnats@sources.redhat.com
Subject: Re: c++/2412: gdb crashes with complex data
Date: Wed, 6 Feb 2008 18:34:45 -0800

 If you leave the gdb-gnats@sources.redhat.com address in the CC line,
 GDB's bug-tracking system will automatically include your notes in the
 bug database entry, which is helpful for other people following along.
 
 I wasn't able to find the test program you provided in your original
 description --- only English descriptions of what to try.
 
 The new test program you submitted seems to work for me as well.  Have
 you checked out the current GDB sources from CVS and built them?
 There are instructions for doing so at
 http://sourceware.org/gdb/current/.
 
 On Feb 6, 2008 5:30 PM, jacob navia <jacob@jacob.remcomp.fr> wrote:
 >
 > Jim Blandy wrote:
 > > This seems to be fixed in the current sources.  Would you like to try
 > > building from CVS and see if the problem still occurs?
 > >
 > > If it does, please provide a specific test program we can use.
 > > There's no reason to provide hints when exact instructions are not
 > > much more trouble.
 > >
 > > $ cat complex.c
 > > cat: complex.c: No such file or directory
 > > $ cd ~/play
 > > $ cat complex.c
 > > #include <stdio.h>
 > >
 > > long double _Complex foo = 4.8;
 > >
 > > int
 > > main (int argc, char **argv)
 > > {
 > >   puts ("Hello, world!");
 > >   return 0;
 > > }
 > > $ gcc -g complex.c -o complex
 > > $ ~/gdb/pub/nat/gdb/gdb ~/play/complex
 > > GNU gdb 6.7.50.20080111-cvs
 > > Copyright (C) 2008 Free Software Foundation, Inc.
 > > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 > > This is free software: you are free to change and redistribute it.
 > > There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 > > and "show warranty" for details.
 > > This GDB was configured as "i686-pc-linux-gnu"...
 > > (gdb) start
 > > Breakpoint 1 at 0x8048395: file complex.c, line 8.
 > > Starting program: /home/jimb/play/complex
 > > main () at complex.c:8
 > > 8         puts ("Hello, world!");
 > > (gdb) print foo
 > > $1 = 4.7999999999999998223643160599749535 + 0 * I
 > > (gdb)
 > >
 >
 > Please, I sent you a program that crashes gdb in my bug description.
 > You used a GLOBAL variable. Please use a local variable:
 >
 > int main(void)
 > {
 >         long double _Complex s = 1;
 >         long double _Complex m = 1;
 > }
 >
 > put a breakpoint after the first assignment and in gdb type
 > print s
 > This will crash gdb with a segmentation fault
 >
 >
 >

Re: c++/2412: gdb crashes with complex data

[Jim Blandy]

The following reply was made to PR c++/2412; it has been noted by GNATS.

From: "Jim Blandy" <jimb@red-bean.com>
To: jacob@jacob.remcomp.fr
Cc: gdb-gnats@sources.redhat.com
Subject: Re: c++/2412: gdb crashes with complex data
Date: Wed, 6 Feb 2008 17:20:48 -0800

 This seems to be fixed in the current sources.  Would you like to try
 building from CVS and see if the problem still occurs?
 
 If it does, please provide a specific test program we can use.
 There's no reason to provide hints when exact instructions are not
 much more trouble.
 
 $ cat complex.c
 cat: complex.c: No such file or directory
 $ cd ~/play
 $ cat complex.c
 #include <stdio.h>
 
 long double _Complex foo = 4.8;
 
 int
 main (int argc, char **argv)
 {
   puts ("Hello, world!");
   return 0;
 }
 $ gcc -g complex.c -o complex
 $ ~/gdb/pub/nat/gdb/gdb ~/play/complex
 GNU gdb 6.7.50.20080111-cvs
 Copyright (C) 2008 Free Software Foundation, Inc.
 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 and "show warranty" for details.
 This GDB was configured as "i686-pc-linux-gnu"...
 (gdb) start
 Breakpoint 1 at 0x8048395: file complex.c, line 8.
 Starting program: /home/jimb/play/complex
 main () at complex.c:8
 8         puts ("Hello, world!");
 (gdb) print foo
 $1 = 4.7999999999999998223643160599749535 + 0 * I
 (gdb)

Re: c++/2412: gdb crashes with complex data

[jimb]

Synopsis: gdb crashes with complex data

State-Changed-From-To: open->closed
State-Changed-By: jimb
State-Changed-When: Thu Feb  7 01:21:58 2008
State-Changed-Why:
    Apparently fixed in CVS.

http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2412

c++/2412: gdb crashes with complex data

[jacob]

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>Number:         2412
>Category:       c++
>Synopsis:       gdb crashes with complex data
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 06 23:38:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Jacob Navia
>Release:        GNU gdb 6.7.1
>Organization:
>Environment:
linux
>Description:
Every time I want to display a complex number in gdb
it crashes.

Crash in
void
print_floating (const gdb_byte *valaddr, struct type *type,
                struct ui_file *stream)

How to reproduce

1) Define a long double _Complex number.
   For example:  long double _Complex foo = 4.8;
3) In gdb type
   print foo

crash, gdb dies.

This is after I downloaded the latest version.

Machine:

i486 linux vanilla ubuntu distribution.
root@ubuntu:/tmp/gdb-6.7.1/gdb# gcc -v
Utilisation des specs internes.
Target: i486-linux-gnu
Configuré avec: ../src/configure -v --enable-languages=c,c++,java,f95,objc,ada,treelang --prefix=/usr --with-gxx-include-dir=/usr/include/c++/4.0.2 --enable-shared --with-system-zlib --libexecdir=/usr/lib --enable-nls --without-included-gettext --enable-threads=posix --program-suffix=-4.0 --enable-__cxa_atexit --enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-4.0-1.4.2.0/jre --enable-mpfr --disable-werror --enable-checking=release i486-linux-gnu
Modèle de thread: posix
version gcc 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9)

root@ubuntu:/tmp/gdb-6.7.1/gdb# gdb -v
GNU gdb 6.7.1
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu".
>How-To-Repeat:
1) Define a long double _Complex number.
   For example:  long double _Complex foo = 4.8;
2) In gdb type
   print foo

crash, gdb dies. 
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: