RFR 8058113 Execution of OnOutOfMemoryError command hangs on linux-sparc

Gerald Thornbrugh gerald.thornbrugh at oracle.com
Tue Feb 3 01:52:37 UTC 2015

Hi David,

Thanks for the review.

> Looks good.
> Thanks,
> David
> On 3/02/2015 9:21 AM, Gerald Thornbrugh wrote:
>> Hi,
>> Please review my JDK7u change for JDK-8058113, "Execution of
>> OnOutOfMemoryError command hangs on linux-sparc"
>> The linux fork_and_exec() function in os_linux.cpp requires that a call
>> be made directly to "syscall(fork)" to
>> stay multi-thread safe.  The linux/sparc version of "syscall(fork)"
>> returns the "is_child" flag in a register that
>> is used to determine if the current thread is the child thread. This
>> change creates the function sparc_fork()
>> that uses the correct assembly code to call the linux/sparc version of
>> "syscall(fork)" and returns the process
>> id and "is child" flag.
>> Webrev:
>> http://cr.openjdk.java.net/~dcubed/gthornbr/8058113-webrev/5-for-jdk7u/
>> It was determined that this fix should not be putback into JDK8 or
>> JDK9.  A bug will be filed to look into
>> a better way of doing a multi-thread safe "fork and exec" for all linux
>> platforms in JDK8 and JDK9.
>> I have completed JPRT and Aurora test runs on all platforms including 32
>> and 64 bit linux platforms without issues.
>> I have also completed JDK7u JPRT testing on linux/sparc 64 bit platforms
>> without issues.
>> I also ran the OnOutOfMemoryError test on linux/sparc 64 bit platform
>> and the fix addressed the issue.
>> Thanks,
>> Gerald

More information about the hotspot-runtime-dev mailing list