gdb 5.3 bug
Lev Assinovsky
LAssinovsky@algorithm.aelita.com
Sat Mar 1 16:13:00 GMT 2003
Gdb guys! Help me with solaris please!!
> Hmm. Your testcase works on GNU/Linux, so it must be related to
> i386-solaris shared library support. Maybe someone else on the list
> can help.
----
Lev Assinovsky
Aelita Software Corporation
O&S Core Division, Programmer
ICQ# 165072909
> -----Original Message-----
> From: Daniel Jacobowitz [mailto:drow@mvista.com]
> Sent: Saturday, March 01, 2003 7:05 PM
> To: Lev Assinovsky
> Cc: gdb@sources.redhat.com
> Subject: Re: gdb 5.3 bug
>
>
> On Sat, Mar 01, 2003 at 06:59:45PM +0300, Lev Assinovsky wrote:
> > Dear Daniel!
> > Thank you very match for your advise!
> > Snapshot gdb+dejagnu-20030228 works just fine!
> > Thank a lot all guys who is involved in gdb development.
> > I am sorry but I have to bother you with another gdb problem.
> > The problem is I can't step into the function through the pointer
> > if the function resides in dynamically loaded shared object
> (library).
> > Here is the simple test case:
>
> Hmm. Your testcase works on GNU/Linux, so it must be related to
> i386-solaris shared library support. Maybe someone else on the list
> can help.
>
> >
> > 1. Shared object:
> > ---------- cut here --------
> > #include <iostream>
> > using namespace std;
> >
> > extern "C" {
> > void my_func()
> > {
> > cout << "This is my_func" << endl;
> > }
> >
> > }
> > ---------- cut here --------
> > 2. Main:
> > #include <iostream>
> > #include <memory>
> > #include <dlfcn.h>
> > #include <link.h>
> >
> > using namespace std;
> >
> > void * handle;
> >
> > typedef void ( *Func_t)();
> >
> > Func_t getFunc()
> > {
> > Func_t p = (Func_t)dlsym ( handle, "my_func" );
> > if ( NULL == p )
> > {
> > cout << dlerror() << endl;
> > exit(2);
> > }
> > return p;
> > }
> >
> > int main()
> > {
> > handle = (void*)
> ::dlopen("./func_so/bin/i386-sun-solaris/func_so.so",
> RTLD_NOW | RTLD_LOCAL | RTLD_GROUP);
> > if (handle == NULL)
> > {
> > cout << dlerror() << endl;
> > exit(2);
> > }
> >
> > Func_t f = getFunc();
> > f();
> > }
> > ---------- cut here --------
> >
> > This testcase works, but I can't step into f() (last line) in gdb.
> > Is it possible to work around or fix this problem?
> > Thanks in advance!
> >
> > ----
> > Lev Assinovsky
> > Aelita Software Corporation
> > O&S Core Division, Programmer
> > ICQ# 165072909
> >
> >
> > > -----Original Message-----
> > > From: Daniel Jacobowitz [mailto:drow@mvista.com]
> > > Sent: Friday, February 28, 2003 8:19 PM
> > > To: Lev Assinovsky; gdb@sources.redhat.com
> > > Subject: Re: gdb 5.3 bug
> > >
> > >
> > > On Thu, Feb 27, 2003 at 02:09:30PM -0500, Daniel Jacobowitz wrote:
> > > > On Thu, Feb 27, 2003 at 09:11:14PM +0300, Lev Assinovsky wrote:
> > > > > GNU gdb 5.3
> > > > > Copyright 2002 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 details.
> > > > > This GDB was configured as "i386-pc-solaris2.8"...
> > > > > (gdb) l
> > > > >
> > > > > Program received signal SIGSEGV, Segmentation fault.
> > > > > 0x08136671 in finish_block (symbol=0x6e5f5f3a,
> > > listhead=0x82241f4, old_blocks=0x3a787863, start=1634562671,
> > > > > end=1634562720, objfile=0x8263fe0) at buildsym.c:304
> > > > > 304 struct type *ftype = SYMBOL_TYPE (symbol);
> > > > > (gdb)
> > > > >
> > > > >
> > > > > Any clue what might be the reason of gdb crash?
> > > >
> > > > OK, the value of "symbol" is obviously wrong. Could you
> > > privately send
> > > > me the binary? If that's not possible, at least a
> > > backtrace would be
> > > > useful...
> > >
> > >
> > > Lev,
> > >
> > > You're in luck, this has already been fixed. It appears to
> > > be a bug in
> > > the Sun compilers - it outputs end-of-function markers without a
> > > corresponding beginning-of-function marker. If you get a
> GDB snapshot
> > > from CVS (http://sources.redhat.com/gdb/) it should handle
> > > your program
> > > gracefully.
> > >
> > > --
> > > Daniel Jacobowitz
> > > MontaVista Software Debian
> GNU/Linux Developer
> > >
> >
>
> --
> Daniel Jacobowitz
> MontaVista Software Debian GNU/Linux Developer
>
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