RFR(xs): 8229967: Enable thread local handshakes on zero

[Robbin Ehn]

Thanks!

/Robbin

On 2019-08-21 15:54, Aleksey Shipilev wrote:
> On 8/21/19 10:19 AM, Robbin Ehn wrote:
>> Hi all, please consider.
>>
>> Zero can have handshakes enabled.
>> This prepares the vm for removing global safepoints.
>>
>> Built x64 and sanity tested. (should be platform independent)
>> x86 do not build for me due to workaround_expand_exec_shield_cs_limit.
>>
>> Thanks, Robbin
>>
>> diff -r 7c20dcb59a68 src/hotspot/cpu/zero/globalDefinitions_zero.hpp
>> --- a/src/hotspot/cpu/zero/globalDefinitions_zero.hpp    Mon Aug 19 13:43:51 2019 +0200
>> +++ b/src/hotspot/cpu/zero/globalDefinitions_zero.hpp    Wed Aug 21 10:02:44 2019 +0200
>> @@ -32,2 +32,4 @@
>>
>> +#define THREAD_LOCAL_POLL
>> +
>>   #include <ffi.h>
>> diff -r 7c20dcb59a68 src/hotspot/cpu/zero/globals_zero.hpp
>> --- a/src/hotspot/cpu/zero/globals_zero.hpp    Mon Aug 19 13:43:51 2019 +0200
>> +++ b/src/hotspot/cpu/zero/globals_zero.hpp    Wed Aug 21 10:02:44 2019 +0200
>> @@ -78,3 +78,3 @@
>>
>> -define_pd_global(bool, ThreadLocalHandshakes, false);
>> +define_pd_global(bool, ThreadLocalHandshakes, true);
> 
> FWIW, linux-x86_64-zero-fastdebug bootcycles for me. Looks good!
>