Re: Libjava test failure Was: [PATCH] microblaze: microblaze.md: Use 'SI' instead of 'VOID' for operand 1 of 'call_value_intern'

[Chen Gang <gang.chen.5i5j@gmail.com>]

On 10/6/14 21:54, Andrew Haley wrote:
> On 10/06/2014 02:53 PM, Chen Gang wrote:
>> On 10/6/14 16:37, Andrew Haley wrote:
>>> On 06/10/14 05:08, Chen Gang wrote:
>>>> After try normal configure, get almost the same result, I guess, our
>>>> testsuite under Darwin x86_64 is OK.
>>>>
>>>> If no any additional reply within a week, I shall continue to try to
>>>> analyze the libjava Throw_2 issue.
>>>
>>> Throw_2 is a test specially contrived to detect segfaults that are
>>> not being correctly detected and turned into NullPointerException()s.
>>> A failure indicates that the segfault signal handler is broken.
>>
>> OK, thank, at present, it passes compiling (can generate 'Throw_2.exe'),
>> and after run it without any parameters, "1" is printed, but "2" is not
>> printed.
>>
>> Under Fedora 20 x86_64, the same gcc code, it is OK ("2" can be printed),
>> but under Darwin x86_64, it is "Abort trap: 6" instead of. The related
>> code: "try{Double.parseDouble(str());}catch", and "str(){return null;}".
>>
>> And I shall continue to try to analyze it (within this month), and 
>> welcome any additional ideas, suggestions, and completion for it, 
> 
> Not every platform supports unwinding through signal handlers.  In x86
> Linux there is some very clever code which interacts with the kernel to
> allow this.
> 

Excuse me, I am not quite familiar with Java, I guess what you said is:

 - The related feature need OS kernel support, if OS kernel does not
   support, it may report "Abort trap: 6" or others.

 - And OS kernel has feature to support "1" printed does not mean it
   also has feature to support "2" printed.

 - And I need try to make sure that my current Darwin kernel whether
   supports it or not.

If what I guess is incorrect, please let me know, thanks.

For me, whether Darwin kernel supports or not, we have to improve
current implementation (may be testsuite configure or Makefile) to
avoid testsuite breaking.


Thanks.
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed