RFR: 8230228: [TESTBUG] Several runtime/ErrorHandling tests may fail on some platforms

[Jie Fu]

Thanks again, Misha.

On 2019/8/29 上午6:48, mikhailo.seledtsov at oracle.com wrote:
> I can sponsor.
>
> On 8/27/19 6:01 PM, Jie Fu wrote:
>> Thanks Misha, Coleen and Thomas for your review.
>> I agree with Thomas' comments. Thanks.
>>
>> Updated: http://cr.openjdk.java.net/~jiefu/8230228/webrev.01/
>> The patch is ready to be pushed in the updated version.
>>
>> I need a sponsor.
>> Could someone help to push it?
>>
>> Thanks a lot.
>> Best regards,
>> Jie
>>
>> On 2019/8/28 上午3:36, Thomas Stüfe wrote:
>>> Thanks for fixing, looks reasonable.
>>>
>>> About the specific address, yes, we are aware of that. We also could 
>>> dynamically generate an invalid address by mmapping and mprotecting, 
>>> but that address would have to be communicated back to the test and 
>>> that would have made the test slightly more complicated than 
>>> necessary. Basically, it works well enough for now, and if we find 
>>> that it doesn't work on all platforms anymore we can change it.
>>>
>>> Cheers, Thomas
>>>
>>>
>>> On Tue, Aug 27, 2019, 14:56 Jie Fu <fujie at loongson.cn 
>>> <mailto:fujie at loongson.cn>> wrote:
>>>
>>>     Hi all,
>>>
>>>     JBS: https://bugs.openjdk.java.net/browse/JDK-8230228
>>>     Webrev: http://cr.openjdk.java.net/~jiefu/8230228/webrev.00/
>>>
>>>     These tests failed on our mips Fedora-21 platform.
>>>     ----------------------------------------------
>>> jtreg:test/hotspot/jtreg/runtime/ErrorHandling/TimeoutInErrorHandlingTest.java 
>>>
>>> jtreg:test/hotspot/jtreg/runtime/ErrorHandling/ErrorFileRedirectTest.java 
>>>
>>> jtreg:test/hotspot/jtreg/runtime/ErrorHandling/BadNativeStackInErrorHandlingTest.java 
>>>
>>> jtreg:test/hotspot/jtreg/runtime/ErrorHandling/SafeFetchInErrorHandlingTest.java 
>>>
>>>     ----------------------------------------------
>>>
>>>     The reason is that memory access to address 0xABC0000000000ABCULL,
>>>     which
>>>     is returned by VMError::get_segfault_address() [1], trigers
>>>     SIGBUS, not
>>>     SIGSEGV, on our platform.
>>>     Please note that it seems there is no way to guarantee to generate
>>>     SIGSEGV by accessing an specific invalid memory address for all
>>>     platforms [2].
>>>     Could you please review it and give me some advice?
>>>
>>>     Thanks a lot.
>>>     Best regards,
>>>     Jie
>>>
>>>     [1]
>>> http://hg.openjdk.java.net/jdk/jdk/file/cb836bd08d58/src/hotspot/share/utilities/vmError.cpp#l68 
>>>
>>>     [2]
>>> http://hg.openjdk.java.net/jdk/jdk/file/cb836bd08d58/src/hotspot/os_cpu/bsd_x86/os_bsd_x86.cpp#l579 
>>>
>>>
>>>
>>