[llvm-commits] [PATCH] A "very verbose" mode for FileCheck

[Dmitri Gribenko]

On Wed, Jan 16, 2013 at 8:47 PM, Dmitri Gribenko <gribozavr at gmail.com> wrote:
> On Wed, Jan 16, 2013 at 8:42 PM, David Blaikie <dblaikie at gmail.com> wrote:
>> On Wed, Jan 16, 2013 at 10:32 AM, Dmitri Gribenko <gribozavr at gmail.com> wrote:
>>> Hello,
>>>
>>> When someone breaks a FileCheck-based test on some buildbot, sometimes
>>> it may not be obvious *why* did it fail.  If the failure can not be
>>> reproduced locally, it can be very hard to fix.
>>
>> Agreed.
>>
>>> I propose adding a "very verbose" mode to FileCheck.  In this mode
>>> FileCheck will dump the input file in case of failure.
>>
>> Why have a separate mode? The same problem of FileCheck failure
>> investigation exists even when developing locally - quite often after
>> a FileCheck failure the immediate next step is to run the command
>> without FileCheck just to get the output. Could we streamline this
>> scenario in general for both local and remote execution? (eg: have
>> FileCheck always dump a temp file & log the location)
>
> I agree that it is useful.  Will implement and post an updated version.

Updated patch attached.  Now FileCheck prints:

<all the usual messages>
Saving input file "<stdin>" to "/tmp/filecheck.txt-5PEf0q"
Input file "<stdin>" contains:
<...>

Dmitri

-- 
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/
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