Date: Mon, 01 Sep 2008 13:53:23 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: Kostik Belousov <kostikbel@gmail.com> Cc: Daniel Eischen <deischen@freebsd.org>, David Xu <davidxu@freebsd.org>, freebsd-threads@freebsd.org Subject: Re: mysterious hang in pthread_create Message-ID: <48BBC9A3.1050905@icyb.net.ua> In-Reply-To: <20080901084548.GQ2038@deviant.kiev.zoral.com.ua> References: <48B8052A.6070908@icyb.net.ua> <20080829143645.GY2038@deviant.kiev.zoral.com.ua> <Pine.GSO.4.64.0808291223240.5086@sea.ntplx.net> <20080829190506.GA2038@deviant.kiev.zoral.com.ua> <Pine.GSO.4.64.0808301128410.9898@sea.ntplx.net> <20080830155622.GF2038@deviant.kiev.zoral.com.ua> <Pine.GSO.4.64.0808301200460.9898@sea.ntplx.net> <20080830184512.GH2038@deviant.kiev.zoral.com.ua> <48BBA369.9010108@freebsd.org> <48BBA925.1000303@icyb.net.ua> <20080901084548.GQ2038@deviant.kiev.zoral.com.ua>
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on 01/09/2008 11:45 Kostik Belousov said the following: > On Mon, Sep 01, 2008 at 11:34:45AM +0300, Andriy Gapon wrote: >> on 01/09/2008 11:10 David Xu said the following: >>> The ancient bug is in rtld, rlock_acquire() and wlock_acquire() test >>> thread_flag as a boolean value, because pt_iterate_phdr() tries to >>> lock two locks at same time, this test will always fail once it >>> acquired first lock. >>> >>> The following silly patch fixes the problem Andriy encountered: >> I can confirm - this fixed the issue for me. >> David, thanks! > > Does libc_r still work with patch applied ? In what sense? The test program that I posted seems to hang in both cases (patched and unpatched rtld). -- Andriy Gapon
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