Re: [PATCH] testsuite: turn down verbosity of "process-message"

[Richard Biener <richard.guenther@gmail.com>]

On Tue, Dec 4, 2018 at 10:36 PM David Malcolm <dmalcolm@redhat.com> wrote:
>
> When debugging a failing test, I typically invoke DejaGnu at
> verbosity level 2 (via RUNTESTFLAGS="-v -v dg.exp=something"),
> so that DejaGnu prints the command line used to invoke the
> compiler; specifically these two sites:
>   target.exp "Invoking the compiler as "
>   remote.exp "Executing on $hostname"
> which are both verbosity level 2.
>
> Unfortunately I run into an O(n^2) issue with logging from
> process-message:
>
>   verbose "process-message:\n${dg-messages}" 2
>
> where, as each message each processed, it emits the state
> of dg-messages, containing the new message and all messages so far,
> leading to exponentially-increasing output at level 2 as more test
> messages are added.
>
> This patch papers over the problem by moving the
> problematic message to verbosity level 3.
>
> Successfully regrtested on x86_64-pc-linux-gnu.
>
> OK for trunk?

OK

> gcc/testsuite/ChangeLog:
>         * lib/gcc-dg.exp (process-message): Change verbosity level of
>         "verbose" from 2 to 3.
>         (dg-locus): Likewise.
> ---
>  gcc/testsuite/lib/gcc-dg.exp | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/gcc/testsuite/lib/gcc-dg.exp b/gcc/testsuite/lib/gcc-dg.exp
> index 305dd3c..054d884 100644
> --- a/gcc/testsuite/lib/gcc-dg.exp
> +++ b/gcc/testsuite/lib/gcc-dg.exp
> @@ -1165,7 +1165,7 @@ proc process-message { msgproc msgprefix dgargs } {
>      set newentry [lreplace $newentry 2 2 $expmsg]
>
>      set dg-messages [lreplace ${dg-messages} end end $newentry]
> -    verbose "process-message:\n${dg-messages}" 2
> +    verbose "process-message:\n${dg-messages}" 3
>  }
>
>  # Look for messages that don't have standard prefixes.
> @@ -1199,7 +1199,7 @@ proc dg-locus { args } {
>
>      set newentry [lreplace $newentry 2 2 $expmsg]
>      set dg-messages [lreplace ${dg-messages} end end $newentry]
> -    verbose "process-message:\n${dg-messages}" 2
> +    verbose "process-message:\n${dg-messages}" 3
>  }
>
>  # Handle output from -fopt-info for MSG_OPTIMIZED_LOCATIONS:
> --
> 1.8.5.3
>