RFR 8058113 Execution of OnOutOfMemoryError command hangs on linux-sparc
gerald.thornbrugh at oracle.com
Mon Feb 2 23:42:27 UTC 2015
Thanks for the review!
> Looks good.
> On 2/2/2015 3:21 PM, Gerald Thornbrugh wrote:
>> 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.
>> 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.
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