Request for review (M): 7132070: Use a mach_port_t as the OSThread thread_id rather than pthread_t on BSD/OSX

Mikael Gerdin mikael.gerdin at
Wed Feb 15 05:57:05 PST 2012

Hi Staffan,

It looks like you're adding Mac-specific stuff like thread_t and calls 
to ::mach_thread_self() inside _ALLBSD_SOURCE #ifdefs, are you sure this 
won't break BSD builds?
Does the OSX compiler define _ALLBSD_SOURCE or is that for 
It's too bad we don't do regular builds on any of the BSDs, otherwise 
this would have been easier to figure out.


On 2012-02-15 11:29, Staffan Larsen wrote:
> Please review the following change:
> Bug:
> Webrev:
> This changes the value returned by OSThread::thread_id() and
> os::current_thread_id() on macosx to return the mach thread_t instead of
> pthread_t. There is a separate method OSThread:pthread_id() that returns
> the pthread_t.
> The reason for this change is both that JFR would like a 4 byte value
> for thread id, and that SA requires access to the thread_t.
> Thanks,
> /Staffan

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