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* [Bug gdb/12521] New: sizeof() wrong
@ 2011-02-27 2:25 carlo at alinoe dot com
2011-02-27 8:31 ` [Bug gdb/12521] " schwab@linux-m68k.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: carlo at alinoe dot com @ 2011-02-27 2:25 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12521
Summary: sizeof() wrong
Product: gdb
Version: 7.0
Status: NEW
Severity: normal
Priority: P2
Component: gdb
AssignedTo: unassigned@sourceware.org
ReportedBy: carlo@alinoe.com
I have a pure 64-bit machine (x86_64-linux-gnu),
uint64_t is unsigned long is 64 bit.
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 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 "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) p/x -1UL
$1 = 0xffffffff
(gdb) p/x (unsigned long)-1
$2 = 0xffffffff
(gdb) p sizeof(unsigned long)
$3 = 4
(gdb) p/x -1ULL
$4 = 0xffffffffffffffff
(gdb) p/x (unsigned long long)-1
$5 = 0xffffffffffffffff
(gdb) p sizeof(unsigned long long)
$6 = 8
That is the exact output that you'd expect on a 32-bit machine!
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* [Bug gdb/12521] sizeof() wrong
2011-02-27 2:25 [Bug gdb/12521] New: sizeof() wrong carlo at alinoe dot com
@ 2011-02-27 8:31 ` schwab@linux-m68k.org
2012-03-21 3:53 ` fchen0000 at gmail dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: schwab@linux-m68k.org @ 2011-02-27 8:31 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12521
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> 2011-02-27 08:31:37 UTC ---
Depending on which target you debug, gdb can do both 32 and 64 bit, which is
decided only after attaching to a target.
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* [Bug gdb/12521] sizeof() wrong
2011-02-27 2:25 [Bug gdb/12521] New: sizeof() wrong carlo at alinoe dot com
2011-02-27 8:31 ` [Bug gdb/12521] " schwab@linux-m68k.org
@ 2012-03-21 3:53 ` fchen0000 at gmail dot com
2012-03-27 3:36 ` sergiodj at redhat dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: fchen0000 at gmail dot com @ 2012-03-21 3:53 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12521
fchen <fchen0000 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fchen0000 at gmail dot com
Version|7.0 |7.4
--- Comment #2 from fchen <fchen0000 at gmail dot com> 2012-03-21 03:52:36 UTC ---
Attach gdb to /bin/ls or set architecture manually won't work. It's a bug.
=============================================================================
gdb /bin/ls
GNU gdb (GDB) 7.4
Copyright (C) 2012 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 "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /bin/ls...(no debugging symbols found)...done.
(gdb) whatis sizeof(float)
type = int
(gdb) show architecture
The target architecture is set automatically (currently i386:x86-64)
(gdb) set architecture i386:x86-64
The target architecture is assumed to be i386:x86-64
(gdb) whatis sizeof(float)
type = int
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* [Bug gdb/12521] sizeof() wrong
2011-02-27 2:25 [Bug gdb/12521] New: sizeof() wrong carlo at alinoe dot com
2011-02-27 8:31 ` [Bug gdb/12521] " schwab@linux-m68k.org
2012-03-21 3:53 ` fchen0000 at gmail dot com
@ 2012-03-27 3:36 ` sergiodj at redhat dot com
2012-03-27 11:46 ` fchen0000 at gmail dot com
2012-03-28 18:29 ` tromey at redhat dot com
4 siblings, 0 replies; 6+ messages in thread
From: sergiodj at redhat dot com @ 2012-03-27 3:36 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12521
Sergio Durigan Junior <sergiodj at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sergiodj at redhat dot com
--- Comment #3 from Sergio Durigan Junior <sergiodj at redhat dot com> 2012-03-27 03:35:40 UTC ---
(In reply to comment #2)
> Attach gdb to /bin/ls or set architecture manually won't work. It's a bug.
>
> =============================================================================
> gdb /bin/ls
>
> GNU gdb (GDB) 7.4
> Copyright (C) 2012 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 "x86_64-unknown-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /bin/ls...(no debugging symbols found)...done.
> (gdb) whatis sizeof(float)
> type = int
> (gdb) show architecture
> The target architecture is set automatically (currently i386:x86-64)
> (gdb) set architecture i386:x86-64
> The target architecture is assumed to be i386:x86-64
> (gdb) whatis sizeof(float)
> type = int
What is the output you are expecting? `sizeof (float)' is giving the right
size of the `float' type.
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* [Bug gdb/12521] sizeof() wrong
2011-02-27 2:25 [Bug gdb/12521] New: sizeof() wrong carlo at alinoe dot com
` (2 preceding siblings ...)
2012-03-27 3:36 ` sergiodj at redhat dot com
@ 2012-03-27 11:46 ` fchen0000 at gmail dot com
2012-03-28 18:29 ` tromey at redhat dot com
4 siblings, 0 replies; 6+ messages in thread
From: fchen0000 at gmail dot com @ 2012-03-27 11:46 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12521
--- Comment #4 from fchen <fchen0000 at gmail dot com> 2012-03-27 11:45:51 UTC ---
sizeof() should return size_t not int. They are different.
>
> What is the output you are expecting? `sizeof (float)' is giving the right
> size of the `float' type.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug gdb/12521] sizeof() wrong
2011-02-27 2:25 [Bug gdb/12521] New: sizeof() wrong carlo at alinoe dot com
` (3 preceding siblings ...)
2012-03-27 11:46 ` fchen0000 at gmail dot com
@ 2012-03-28 18:29 ` tromey at redhat dot com
4 siblings, 0 replies; 6+ messages in thread
From: tromey at redhat dot com @ 2012-03-28 18:29 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12521
Tom Tromey <tromey at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |tromey at redhat dot com
Resolution| |DUPLICATE
--- Comment #5 from Tom Tromey <tromey at redhat dot com> 2012-03-28 18:29:14 UTC ---
I sent a patch for this a long time ago.
I think it needed a few tweaks though.
http://sourceware.org/ml/gdb-patches/2009-01/msg00014.html
*** This bug has been marked as a duplicate of bug 9164 ***
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end of thread, other threads:[~2012-03-28 18:29 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-02-27 2:25 [Bug gdb/12521] New: sizeof() wrong carlo at alinoe dot com
2011-02-27 8:31 ` [Bug gdb/12521] " schwab@linux-m68k.org
2012-03-21 3:53 ` fchen0000 at gmail dot com
2012-03-27 3:36 ` sergiodj at redhat dot com
2012-03-27 11:46 ` fchen0000 at gmail dot com
2012-03-28 18:29 ` tromey at redhat dot com
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