RFR: 8020962: dump loaded java classes when vm crash

[Yumin Qi]

Ioi,

   Thanks for the reminding, it is possible. I will use env instead.

Yumin

On 8/12/2013 11:00 AM, Ioi Lam wrote:
> On 08/12/2013 10:00 AM, Yumin Qi wrote:
>>
>> - What if it the SA also crashes, will it launch a third VM then a 
>> fourth etc?
>>
>>   Definitely don't want to see this happened in a chain. The solution 
>> may use a property such as 
>> sun.jvm.hotspot.DumpLoadedClasses.dumpingInProcess=true to pass into 
>> SA process, at launching call, check if the property set, if set, do 
>> not fork. When SA process died, it will generate core file first, 
>> note the target process still waiting for its exit, so when target 
>> exit, the core file (if both use default core as name) will be 
>> override by target. The SA process will only leave a hs_err_pid*.log 
>> file. (? read such property in handler is possible?)
>
> There is still the chance that the VM may have crashed before the 
> properties are initialized. Maybe use environment variables instead?
>
> - Ioi