RFR(M): 8020775: PPC64 (part 12): posix signal printing

[Vladimir Kozlov]

David,

On 7/28/13 7:46 PM, David Holmes wrote:
> On 26/07/2013 9:11 AM, Lindenmaier, Goetz wrote:
>> Hi,
>>
>> we'd like to contribute our posix signal printing.
>
> This really isn't "posix signals" as it combines all the OS specific
> signal definitions into one chunk of code.

Currently it is the only place in our sources where we can combine code 
for all unix variations.

>
> + // A number high enough to contain all possible signal numbers.
> + #define MAX_SIGNAL_NUMBER 70
>
> Why do you need this when you use sigaddset to check validity anyway?
> What is this "maximum signal number" meant to represent anyway? The
> maximum signal number on the platform, or the maximum signal number for
> a signal that the JVM will install a handler for?
>
> The runtime team will need to take a good look at this. Personally I'd
> rather not see all the different OS stuff piled in together. I'd
> certainly like to see as little duplication as possible, but I'd rather
> platform specific stuff was dealt with in platform specific files.

It is just printing unification to avoid a lot of duplication.
I agree that methods is_valid_signal() could stay in platform specific 
files. But to have the rest, signals names and print methods, in one 
place I think is good.

Regards,
Vladimir

>
> David
> -----
>
>> We implemented some routines to print signal and sa_flags information
>> in the os/posix files, and call them from
>> os::print_siginfo and print_signal_handler() in the various unix
>> variant directories.
>> The output is a bit more verbose than the existing version.
>>
>> We contribute this here, as our aix code uses this too.
>
>
>
>> Please review this and test it if you think we should add this.
>> We'd appreciate it.
>> http://cr.openjdk.java.net/~goetz/webrevs/8020775-print_sig/
>>
>> Thanks and best regards,
>>    Goetz.
>>