diff options
Diffstat (limited to 'open_issues/libpthread_pthread_key_create_reuse.mdwn')
| -rw-r--r-- | open_issues/libpthread_pthread_key_create_reuse.mdwn | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/open_issues/libpthread_pthread_key_create_reuse.mdwn b/open_issues/libpthread_pthread_key_create_reuse.mdwn new file mode 100644 index 00000000..11c9a821 --- /dev/null +++ b/open_issues/libpthread_pthread_key_create_reuse.mdwn @@ -0,0 +1,47 @@ +[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +[[!meta title="libpthread: pthread_key_create, reuse"]] + +IRC, FreeNode, #hurd, 2011-07-02 + +[[!tag open_issue_libpthread]] + + < pinotree> hm, maybe i found a libpthread bug + * pinotree tries a testcase + < pinotree> yesssss, found the bug :) + < pinotree> youpi: it's a problem of the key reuse in pthread_key_create() + < youpi> it doesn't reset it? + < youpi> were you looking at the licq issue? + < pinotree> no, gtest + < youpi> k + < youpi> licq has a failing threadspecific issue + < youpi> [ FAILED ] ThreadSpecificData.dataDeletedWhenThreadExits + < pinotree> basically, pthread_key_delete() does not delete the key values + from the "thread_specifics" ihash + < pinotree> but those were new keys, so i'm not sure it is allowed to + return values of previous keys? + < pinotree> after all, the actual key value is an implementation detail, + applications shouldn't care about it being reused + < pinotree> (imho) + < youpi> Upon key creation, the value NULL shall be associated with the new + key in all active threads. + < youpi> ok, so we have to clear it in all threads + < youpi> that's a pity + < pinotree> or just remove the entry from the hash on key removal + < youpi> pinotree: from all the hashes, you mean? + < pinotree> youpi: from how i see it, adding a snippet like + http://paste.debian.net/121690/ in pthread_key_delete() should do the job + < youpi> that only drops from the current thread + < pinotree> ah hm, other threads + < youpi> we need to drop from all threads + < youpi> that's the pity part + < pinotree> youpi: the licq case could look like a similar issue, at a + veeery quick glance |