gdb script never loads

[Daniel Huckstep]

When I use gdb to debug go, which granted is fairly rare, the go support python script never loads. It's never loaded for me, but only lately I started to care.

Dumping out the sections, it has __debug_gdb_scri while the docs in the python script say it looks for .debug_gdb_scripts

This is on go 1.0.3/OSX Mountain Lion/gdb 7.5.1 using no extra gcflags or anything else.

I can load the script manually and it works, but that's no fun.

Ideas? Does it just not work on OSX because the section names are different?

- Daniel

[minux]

in fact, it is a bug of gdb. the real issue is that the gdb is looking for

an impossible (too long) section name on OS X: __debug_gdb_script

 

[Daniel Huckstep]

Blargh. So am I just stuck on OSX? I briefly looked at the gdb 7.6 notes but didn't see anything that would suggest it fixes this.

Has anybody had this work on OSX?

- Daniel

[Ian Lance Taylor]

On Thu, May 2, 2013 at 6:15 PM, Daniel Huckstep
<darkh...@darkhelmetlive.com> wrote:
> Blargh. So am I just stuck on OSX? I briefly looked at the gdb 7.6 notes but
> didn't see anything that would suggest it fixes this.
>
> Has anybody had this work on OSX?

This is something to ask the gdb maintainers: how do embedded GDB
scripts work on OS X?

Ian

> On Tuesday, April 30, 2013 6:41:09 PM UTC-6, minux wrote:
>>
>>
>> On Wednesday, May 1, 2013, Daniel Huckstep wrote:
>>>
>>> When I use gdb to debug go, which granted is fairly rare, the go support
>>> python script never loads. It's never loaded for me, but only lately I
>>> started to care.
>>>
>>> Dumping out the sections, it has __debug_gdb_scri while the docs in the
>>> python script say it looks for .debug_gdb_scripts
>>>
>>> This is on go 1.0.3/OSX Mountain Lion/gdb 7.5.1 using no extra gcflags or
>>> anything else.
>>>
>>> I can load the script manually and it works, but that's no fun.
>>>
>>> Ideas? Does it just not work on OSX because the section names are
>>> different?
>>
>> in fact, it is a bug of gdb. the real issue is that the gdb is looking for
>> an impossible (too long) section name on OS X: __debug_gdb_script
>>
>

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[Duncan Holm]

For the time being, we can at least reduce the manual loading to typing "g" by putting this in a .gdbinit file:

define g

python

import subprocess as p

cmd = ["go", "env", "GOROOT"]

gdb_cmd = "source %s/src/pkg/runtime/runtime-gdb.py" % p.check_output(cmd)[:-1]

gdb.execute(gdb_cmd)

end

--