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

David Holmes david.holmes at oracle.com
Sun Aug 18 20:57:53 PDT 2013

On 17/08/2013 3:12 AM, Vladimir Kozlov wrote:
> 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.

But it isn't all common code, a lot of it is platform specific. I 
thought os_posix was supposed to be for factoring out common POSIX 
functionality. :(


>> + // 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.

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