Re: [Qemu-devel] Re: Re: [PATCH] Fix to 'gdb detach' stub

[Aurelien Jarno <aurelien@aurel32.net>]

On Fri, Feb 26, 2010 at 02:13:50PM -0300, Daniel Gutson wrote:
> Hello Kevin,
> 	please let me know if this works.
> If so, please remember that I'd need somebody to commit this for me, since I don't have write-access.
> 
> Undoing line wrap and tabs.

Thanks applied.

> Thanks!
> 	Daniel.
> 
> [old same text.]
> With this patch, 'gdb detach' correctly resumes the inferior execution 
> after detaching the debugger.
> The bug was caused by qemu asking gdb to execute a syscall (isatty) 
> after the detach, and then waiting (forever) for the reply. I fixed this 
> by properly setting gdb_syscall_mode appropriately in the 'detach' 
> packet handling, so subsequent syscalls are solved by qemu rather than gdb.
> 
> Signed-off-by: Daniel Gutson <dgutson@codesourcery.com>
> ---
>  gdbstub.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/gdbstub.c b/gdbstub.c
> index 91c5f68..92bb36d 100644
> --- a/gdbstub.c
> +++ b/gdbstub.c
> @@ -1848,6 +1848,7 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
>      case 'D':
>          /* Detach packet */
>          gdb_breakpoint_remove_all();
> +        gdb_syscall_mode = GDB_SYS_DISABLED;
>          gdb_continue(s);
>          put_packet(s, "OK");
>          break;
> -- 
> 1.6.2.4
> 
> 
> 
> 
> 

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net