Hotspot segfaulting on Linux SPARC

[Robbin Ehn]

Hi,

On 2018-04-17 23:08, John Paul Adrian Glaubitz wrote:
> On 04/17/2018 11:05 PM, David Holmes wrote:
>>> This seems to be theculprit: http://hg.openjdk.java.net/jdk/hs/rev/0ce0ac68ace7
>>
>> So you can run okay with -XX:-ThreadLocalHandshakes ?
> 
> A HellWorld runs fine although I don't know whether that verifies anything:
> 
> glaubitz at deb4g:/srv/glaubitz$ hs/build/linux-sparcv9-normal-server-release/jdk/bin/java -XX:-ThreadLocalHandshakes HelloWorld

Use something like:
java -Xcomp -XX:LoopStripMiningIter=1 -XX:+UseCountedLoopSafepoints 
-XX:+SafepointALot -XX:GuaranteedSafepointInterval=1 HelloWorld
If you are not extremely unlucky you should hit a poll exception.

Until sparc/Linux is fixed and tested, I suggest we remove handshake support for 
it by something like:
diff -r 69d7398038c5 src/hotspot/cpu/sparc/globalDefinitions_sparc.hpp
--- a/src/hotspot/cpu/sparc/globalDefinitions_sparc.hpp	Wed Apr 18 09:25:51 2018 
+0200
+++ b/src/hotspot/cpu/sparc/globalDefinitions_sparc.hpp	Wed Apr 18 09:48:13 2018 
+0200
@@ -51,8 +51,8 @@
  #if defined(SOLARIS)
  #define SUPPORT_RESERVED_STACK_AREA
+// SPARC solaris have implemented the local polling
+#define THREAD_LOCAL_POLL
  #endif

-// SPARC have implemented the local polling
-#define THREAD_LOCAL_POLL

  #endif // CPU_SPARC_VM_GLOBALDEFINITIONS_SPARC_HPP


/Robbin


> Hello, World
> glaubitz at deb4g:/srv/glaubitz$
>