Date: Tue, 27 May 2003 18:02:46 -0400 (EDT) From: Daniel Eischen <eischen@pcnet1.pcnet.com> To: Petri Helenius <pete@he.iki.fi> Cc: freebsd-threads@freebsd.org Subject: Re: malloc(): error: recursive call Message-ID: <Pine.GSO.4.10.10305271743040.9007-100000@pcnet1.pcnet.com> In-Reply-To: <038a01c32495$6a1e17f0$812a40c1@PETEX31>
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On Wed, 28 May 2003, Petri Helenius wrote: > >And what does `ldd libnetsnmp.so.x`, `ldd libfoo.y`, show? > > They give empty replies. > > >What is `ldd yourexecutable` show? > > Itīs usually linked static but if I remove the -static line it says: > libnetsnmp.so.5 => /usr/local/lib/libnetsnmp.so.5 (0x2807f000) > libcrypto.so.3 => /usr/lib/libcrypto.so.3 (0x280fe000) > libpcap.so.2 => /usr/lib/libpcap.so.2 (0x28209000) > libkse.so.1 => /usr/lib/libkse.so.1 (0x28225000) > libc.so.5 => /usr/lib/libc.so.5 (0x28246000) > > >malloc is thread safe and we've been using it fine > >with all our tests. I suspect you're using another > >library that is using libc_r or something. > > malloc works for me with for example linuxthreads. So I do believe that > the the trigger for malloc locking works, however looking at the code, > spinlocks are implemented differently depending on which thread library is > linked in. I'm going to need a sample. Nothing I have here has this problem, from KDE & mozilla, to the ACE tests. There's also a patch for spinlocks at: http://people.freebsd.org/~deischen/kse/spinlock.diffs This is just a different way for libkse to do spinlocks, and I don't see how it's going to solve your problem, but you can try it. > I have only I686_CPU on my kernel config and I donīt include pthread.h > to all object files because itīs not supposed to be neccessary. (only those > which call pthread_* functions) The code is compiled on a machine with > no SMP and run on both SMP and non-SMP machines. > > Do I understand correctly that libkse mutexes always require syscall > when locking and unlocking? No, it doesn't. It only requires syscalls when a thread's parent KSE has no more threads to run. -- Dan Eischenhelp
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