RFR: 8146879: Truncate new UL log files

[Marcus Larsson]

Hi Dmitry,

On 01/15/2016 08:52 AM, Marcus Larsson wrote:
>
> On 01/14/2016 04:28 PM, Dmitry Samersoff wrote:
>> Marcus,
>>
>> fopen(name, "wa+") truncate file before open it in append mode.
>
> Ah, didn't know you could do that. If it works that would be much 
> better, I'll give it a shot.

Unfortunately this doesn't work on all platforms. Windows fails to open 
files in this mode, so I'm guessing it's some GCC extension we can't use.

Thanks,
Marcus

>
> Thanks,
> Marcus
>
>>
>> -Dmitry
>>
>> On 2016-01-14 18:00, Marcus Larsson wrote:
>>> Hi,
>>>
>>> Please review the following patch to make sure UL truncates existing 
>>> log
>>> files before writing to them. Since files are opened in append mode,
>>> truncation isn't done automatically, so instead the patch adds an
>>> attempt to remove the log file before opening it.
>>>
>>> Webrev:
>>> http://cr.openjdk.java.net/~mlarsson/8146879/webrev.00/
>>>
>>> Issue:
>>> https://bugs.openjdk.java.net/browse/JDK-8146879
>>>
>>> Testing:
>>> Included test through JPRT
>>>
>>> Thanks,
>>> Marcus
>>
>