Event descriptions are truncated in logs

[Yasumasa Suenaga]

Thanks David!
I filed it to JBS:

   https://bugs.openjdk.java.net/browse/JDK-8204551

I concern how we should fix for Windows.
I'm waiting for opinion from you and other OpenJDK developers :-)


Yasumasa


On 2018/06/07 22:01, David Holmes wrote:
> Sorry Yasumasa this one slipped through the cracks - as we say.
> 
> By all means file a bug to record the issue. I'll try to take a look at it over the next couple of working days.
> 
> David
> 
> On 7/06/2018 10:49 PM, Yasumasa Suenaga wrote:
>> Hi,
>>
>> Have you ever checked event strings in hs_err or VM.info?
>> Please see as below!
>>
>>
>> Yasumasa
>>
>>
>> On 2018/05/01 9:41, Yasumasa Suenaga wrote:
>>> Hi all,
>>>
>>> I found event description in hs_error log and VM.info dcmd are trucated as following:
>>>
>>> ```
>>> Event: 1.977 Thread 0x00007f1720010800 Exception <a 'java/lang/IncompatibleClassChangeError'{0x00000000d7a338f0}: Found class java.lang.Object, but interface was expected> (0x00000000d7a338f0) thrown at [/scratch/opt/mach5/mesos/work_dir/slaves/9190d864-6621-4810-ba08-d8d8c75ba674-S702/framewo
>>> ```
>>>
>>> I think we can fix it as this webrev. Is it acceptable?
>>> If so, I will file it to JBS and send review request.
>>>
>>>    http://cr.openjdk.java.net/~ysuenaga/event-msg-truncated/
>>>
>>> This webrev shows event description as following:
>>>
>>> ```
>>> Event: 3.660 Thread 0x00007fa174018800 Exception <a 'java/lang/NoSuchMethodError'{0x00000000d778f878}: java.lang.invoke.DirectMethodHandle$Holder.invokeInterface(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)V> (0x00000000d778f878) thrown at [/home/ysuenaga/OpenJDK/jdk/src/hotspot/share/interpreter/linkResolver.cpp, line 755]
>>> ```
>>>
>>> But I concern this change might not work when HotSpot is built with VS 2013 or earlier.
>>> This change uses vsnprintf() to get length of string, but _vscprintf() will be used when older Visual Studio is used to build.
>>>
>>>
>>> Thanks,
>>>
>>> Yasumasa
>>>