Please review this simple fix.
https://bugs.openjdk.java.net/browse/JDK-8207832
http://cr.openjdk.java.net/~iklam/jdk12/8207832_ClhsdbCDSCore_file_location.v01/
On Linux, the core file location can be controlled via
/proc/sys/kernel/core_pattern.
It could have various patterns such as
core
core.%p
core.%p.something
/tmp/core
/tmp/core.%p
/tmp/core.%p.something
I've tested the fix with all the above patterns, and the %p is correctly
replaced by the process ID.
Note that the pattern can also be more complex, starting with a piping
character ("|").
I have not touched that part of the code, since it doesn't seem to
affect our internal
test infrastructure.
I also instrumented ClhsdbCDSCore.java so we can more easily diagnose
such problems
in the future.
For more info, see
https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
I'll validate with hs tiers 1/2/3/4.
Thanks
- Ioi
