[Gambas-user] How to compile with debugging information enabled - compiles but then a coredump

[Jussi Lahtinen]

Go to the project's source folder (perhaps
~/trunk/examples/examples/Multimedia/ WebCam or MyWebCam?), there;

gdb gbx3
run
bt

Jussi




On Mon, Nov 26, 2012 at 12:26 AM, Richard Terry <rterry at ...1823...>wrote:

>
> Benoit,
>
> I've wiped a hard drive this morning, installed just kubuntu 12.04, put
> on only gambas and its dependencies, compiled successfully with the
> debugging information and installed valgrind.
>
> Can you tell me how to run the webcam example within this to give you
> the information you need to debug the V4L problem?
>
> richard
>
> > Benoît Minisini wrote:
> >
> >> Le 22/11/2012 12:54, richard a écrit :
> >>
> >>
> >>> richard at ...3044...:~/svn/gambas3/trunk$ gambas3
> >>> Bus error (core dumped)
> >>> richard at ...3044...:~/svn/gambas3/trunk$
> >>>
> >>> regards
> >>>
> >>>
> >>>
> >> Weird...
> >>
> >> Can you do that:
> >>
> >> $ gdb gbr3
> >> ...
> >> (gdb) run /usr/bin/gambas3
> >>
> >> Then the program should run until the bus error, and you will get the
> >> gdb prompt back.
> >>
> >> (gdb) bt
> >> ...
> >>
> >> Send me the output of the 'bt' command.
> >>
> >>
> >>
> > richard at ...3044...:~/svn/gambas3/trunk$ gdb gbr3
> > GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2) 7.4-2012.04
> > 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-linux-gnu".
> > For bug reporting instructions, please see:
> > <http://bugs.launchpad.net/gdb-linaro/>...
> > Reading symbols from /usr/local/bin/gbr3...done.
> > (gdb) run /usr/bin/gambas3
> > Starting program: /usr/local/bin/gbr3 /usr/bin/gambas3
> > [Thread debugging using libthread_db enabled]
> > Using host libthread_db library
> "/lib/x86_64-linux-gnu/libthread_db.so.1".
> >
> > Program received signal SIGBUS, Bus error.
> > hash_table_lookup_node (hash_table=0x4c4f435f534c0064,
> > key=0x7ffff5e165d8 "true", len=4384998) at ../share/gb_hash_temp.h:217
> > 217             if (hash_table->mode)
> > (gdb)
> >
> > (gdb) bt
> > #0  hash_table_lookup_node (hash_table=0x4c4f435f534c0064,
> > key=0x7ffff5e165d8 "true", len=4384998) at ../share/gb_hash_temp.h:217
> > #1  0x0000000000408310 in HASH_TABLE_lookup
> > (hash_table=0x4c4f435f534c0064, key=<optimised out>, len=<optimised
> > out>) at ../share/gb_hash_temp.h:260
> > #2  0x000000000042e59e in get_from_key (_object=0x7fffffffe6b5,
> > key=<optimised out>, len=4384998) at gbx_c_subcollection.c:70
> > #3  0x00007ffff5dcd22f in GB_INIT () at main.cpp:1095
> > #4  0x0000000000416db2 in LIBRARY_load (lib=0x66d108) at
> gbx_library.c:262
> > #5  0x000000000043042b in COMPONENT_load (comp=0x66d088) at
> > gbx_component.c:279
> > #6  COMPONENT_load (comp=0x66d088) at gbx_component.c:261
> > #7  0x00000000004306d2 in COMPONENT_load_all () at gbx_component.c:132
> > #8  0x00000000004169d1 in PROJECT_load () at gbx_project.c:465
> > #9  0x00000000004258af in init (file=0x7fffffffe445 "/usr/bin/gambas3",
> > argc=1, argv=0x7fffffffe148) at gbx.c:110
> > #10 0x0000000000404606 in main (argc=1, argv=0x7fffffffe148) at gbx.c:363
> > (gdb)
> >
> >
> >
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