Re: [PATCH v2 00/36] Guile extension language for GDB

Tillmann Karras
2014-05-04T19:59:15Z

On 2014-04-28 00:15, Doug Evans wrote:
> If you're running gdb under gdb, and the child gdb is hanging,
> can you type Ctrl-C when it hangs, and then obtain a backtrace of the
> child gdb?

Pressing Ctrl-C just prints "[New Thread 0x7ffff4b6f700 (LWP 14601)]"
but I don't get any prompt.

> It's been suggested to give the following a try.
> Does that fix things for you?
>
> bash$ export GC_MARKERS=1
>
> before starting gdb
> It's a workaround for a libgc 7.4.0 bug.
> I verified my arch-linux has libgc 7.4.0, but I may have just gotten
> lucky.

Yes, "gdb -ex 'set environment GC_MARKERS 1' -ex r gdb" makes it work
for me. (Maybe your test VM had only one core?)