Date: Sat, 12 Aug 2000 18:14:55 +0200 (CEST) From: "Bradley T. Hughes" <bhughes@trolltech.com> To: stable@freebsd.org Subject: bug in pthread implementation Message-ID: <Pine.BSF.4.21.0008121809030.27068-200000@reticent.troll.no>
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This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --0-1090927533-966096895=:27068 Content-Type: TEXT/PLAIN; charset=US-ASCII It seems that the mutex implementation for recursive mutexes has a bug. a single lock/unlock pair works as expected, but locking 3 times only requires 2 unlocks before the mutex is released. i've read through src/lib/libc_r/uthread/uthread_mutex.c but can't quite follow the logic... i plan on debugging this more and hope to generate a patch... but i figured i'd send off an email about it to see if anyone else can find the solution quicker than i can :) to see the bug, take the attached blah.c and compile it: gcc -pthread -o blah blah.c and run it : ./blah -- Bradley T. Hughes <bhughes@trolltech.com> Waldemar Thranes gt. 98B N-0175 Oslo, Norway Office: +47 21 60 48 92 Mobile: +47 92 01 97 81 --0-1090927533-966096895=:27068 Content-Type: TEXT/PLAIN; charset=US-ASCII; name="blah.c" Content-Transfer-Encoding: BASE64 Content-ID: <Pine.BSF.4.21.0008121814550.27068@reticent.troll.no> Content-Description: blah.c Content-Disposition: attachment; filename="blah.c" I2luY2x1ZGUgPHB0aHJlYWQuaD4NCiNpbmNsdWRlIDxzdGRpby5oPg0KI2lu Y2x1ZGUgPHN0cmluZy5oPg0KI2luY2x1ZGUgPHVuaXN0ZC5oPg0KDQpwdGhy ZWFkX2NvbmRfdCBjb25kOw0KDQp2b2lkICp0aHJlYWQxKHZvaWQgKmFyZykg ew0KICAgIHB0aHJlYWRfbXV0ZXhfdCAqbXV0ZXggPSAocHRocmVhZF9tdXRl eF90ICopIGFyZzsNCiAgICANCiAgICAvLyBsb2NrL3VubG9jayBvbmNlIHdv cmtzIGZpbmUNCiAgICBwcmludGYoInRocmVhZCAxIGxvY2tpbmcgbXV0ZXgg KCVzKVxuIiwNCiAgICAgICAgICAgc3RyZXJyb3IocHRocmVhZF9tdXRleF9s b2NrKG11dGV4KSkpOw0KICAgIA0KICAgIC8vIG1ha2Ugc3VyZSB0aHJlYWQx IGlzIGZpcnN0DQogICAgcHRocmVhZF9jb25kX3dhaXQoJmNvbmQsIG11dGV4 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