Date: Mon, 2 Nov 2009 17:51:44 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: Max Boyarov <m.boyarov@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: strange gdb behavior Message-ID: <20091102155144.GU2147@deviant.kiev.zoral.com.ua> In-Reply-To: <87c7bb540911020552x4a602732pd2caecb17c8c4535@mail.gmail.com> References: <87c7bb540911020552x4a602732pd2caecb17c8c4535@mail.gmail.com>
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On Mon, Nov 02, 2009 at 03:52:33PM +0200, Max Boyarov wrote:
> Hi,
>=20
> Who could help understand this:
>=20
> `--> cat 1.c
> int
> main(int argc, char **argv)
> {
> return 0;
> }
>=20
>=20
> `--> cc -ggdb -o 1 1.c
>=20
>=20
> `--> gdb 1
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you =
are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for detail=
s.
> This GDB was configured as "i386-marcel-freebsd"...
> (gdb) set args test
> (gdb) b main
> Breakpoint 1 at 0x80483d0: file 1.c, line 3.
> (gdb) r
> Starting program: /tmp/1 test
>=20
> Breakpoint 1, main () at 1.c:3
> 3 {
> (gdb) print argc
> Error accessing memory address 0x0: Bad address.
> (gdb) list
> 1 int
> 2 main(int argc, char **argv)
> 3 {
> 4 return 0;
> 5 }
>=20
> checked on 9.0-CURRENT, 8.0-BETA3
Can you check it on RELENG_7 ? It seems to be another old gdb bug.
With gdb 7.0,
(gdb) b main
Breakpoint 1 at 0x8048414: file hello.c, line 8.
(gdb) r
Starting program: /usr/home/kostik/build/bsd/6/stuff/hello1
Breakpoint 1, main (argc=3D1, argv=3D0xbfbfe53c) at hello.c:8
8 for (i =3D 0; i < argc; i++)
while in-tree gdb shows me the same behaviour as yours.
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