[haiku-bugs] Re: [Haiku] #8836: pthread_join on a detached pthread crashes
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Sun, 05 Aug 2012 10:58:36 -0000
#8836: pthread_join on a detached pthread crashes
----------------------------+----------------------------
Reporter: 0x0dev | Owner: nobody
Type: bug | Status: closed
Priority: normal | Milestone: R1
Component: System/POSIX | Version: R1/Development
Resolution: invalid | Keywords:
Blocked By: | Blocking:
Has a Patch: 1 | Platform: All
----------------------------+----------------------------
Changes (by bonefish):
* status: new => closed
* resolution: => invalid
Comment:
The specs are pretty explicit about calling `pthread_join()` on detached
threads:
"The behavior is undefined if the value specified by the thread argument
to pthread_join() does not refer to a joinable thread."
So, crashing is absolutely acceptable behavior. I also don't see how it
can be avoided without leaking memory (or larger changes). The memory for
the pthread handle is freed when a detached thread terminates, so any
pthread function (including `pthread_join()`) using it afterwards will
access invalid memory. Or IOW code that does anything with the handle of a
detached pthread is broken.
Closing the ticket as invalid.
PS: Regarding your patch, please peruse our coding style guidelines. Your
patch contains three violations (space after "if", testing "&" results
with "=="/"!=", double semicolon).
--
Ticket URL: <http://dev.haiku-os.org/ticket/8836#comment:4>
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