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Re: [PATCH] record.c: Add signal handler to record_wait record part


Checked in.

On Fri, Jun 4, 2010 at 13:44, Hui Zhu <teawater@gmail.com> wrote:
> Hi,
>
> I got some error with prec:
>
> (top-gdb) start
> Temporary breakpoint 3 at 0x8053bf8: file ../../src/gdb/gdb.c, line 29.
> Starting program: /home/teawater/gdb/bgdbno/gdb/gdb
> [Thread debugging using libthread_db enabled]
>
> Temporary breakpoint 3, main (argc=
> During symbol reading, incomplete CFI data; unspecified registers
> (e.g., eax) at 0x8053bf3.
> 1, argv=0xbffff594) at ../../src/gdb/gdb.c:29
> 29 ? ? ? ?memset (&args, 0, sizeof args);
> (top-gdb) record
> (top-gdb) c
> Continuing.
> warning: Process record ignores the memory change of instruction at
> address 0xb7c0b2e0 because it can't get the value of the segment
> register.
> Quit
> (top-gdb) si
> Cannot execute this command while the selected thread is running.
>
>
> This is because after gdb output, the signal handler switch to gdb
> part. ?So this ctrl-c make inferior stop not right.
>
> So I make a patch that move the replay patch out of check to handle record too.
>
> Thanks,
> Hui
>
> 2010-06-04 ?Hui Zhu ?<teawater@gmail.com>
>
> ? ? ? ?* record.c (record_wait): Move signal out of replay code.
>
>
> ---
> ?record.c | ? 12 ++++++++----
> ?1 file changed, 8 insertions(+), 4 deletions(-)
>
> --- a/record.c
> +++ b/record.c
> @@ -1069,6 +1069,9 @@ record_wait (struct target_ops *ops,
> ? ? ? ? ? ? ? ? ? ? ? ?"record_resume_step = %d\n",
> ? ? ? ? ? ? ? ? ? ? ? ?record_resume_step);
>
> + ?record_get_sig = 0;
> + ?signal (SIGINT, record_sig_handler);
> +
> ? if (!RECORD_IS_REPLAY && ops != &record_core_ops)
> ? ? {
> ? ? ? if (record_resume_step)
> @@ -1088,6 +1091,9 @@ record_wait (struct target_ops *ops,
> ? ? ? ? ? ? ?ret = record_beneath_to_wait (record_beneath_to_wait_ops,
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?ptid, status, options);
>
> + ? ? ? ? ? ? if (record_resume_step)
> + ? ? ? ? ? ? ? return ret;
> +
> ? ? ? ? ? ? ?/* Is this a SIGTRAP? ?*/
> ? ? ? ? ? ? ?if (status->kind == TARGET_WAITKIND_STOPPED
> ? ? ? ? ? ? ? ? ?&& status->value.sig == TARGET_SIGNAL_TRAP)
> @@ -1183,8 +1189,6 @@ record_wait (struct target_ops *ops,
> ? ? ? ? ? ?}
> ? ? ? ?}
>
> - ? ? ?record_get_sig = 0;
> - ? ? ?signal (SIGINT, record_sig_handler);
> ? ? ? /* If GDB is in terminal_inferior mode, it will not get the signal.
> ? ? ? ? ?And in GDB replay mode, GDB doesn't need to be in terminal_inferior
> ? ? ? ? ?mode, because inferior will not executed.
> @@ -1298,8 +1302,6 @@ Process record: hit hw watchpoint.\n");
> ? ? ? ?}
> ? ? ? while (continue_flag);
>
> - ? ? ?signal (SIGINT, handle_sigint);
> -
> ?replay_out:
> ? ? ? if (record_get_sig)
> ? ? ? ?status->value.sig = TARGET_SIGNAL_INT;
> @@ -1312,6 +1314,8 @@ replay_out:
> ? ? ? discard_cleanups (old_cleanups);
> ? ? }
>
> + ?signal (SIGINT, handle_sigint);
> +
> ? do_cleanups (set_cleanups);
> ? return inferior_ptid;
> ?}
>


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