2011/3/23 Timo Teräs:
> Is uclibc dlopen/dlclose thread safe?
last i looked, it was not
> Valgrind says that we always do bad things at:
> ldso/libdl/libdl.c:453: if (!(runp->tpnt->rtld_flags & RTLD_GLOBAL)) {
> accessing uninitialized (or unmapped) memory.
i'm sure we do many more bad things ;). look at any place that
touches static data. like _dl_init in dlopen().
> Could someone with some ld knowledge at least add very basic
> mutexes to essential parts so that we do not crash?
"very basic" -> "BKL"
> And yes, in libdl.so we should be able to use mutexes at least in NPTL
> as the main libc.so provides pthread_mutex_* symbols, and forwards them
> to libpthread if it's loaded. Though depending on how the code is
> shared, we might need extra care to make sure that the loader .so does
> not use those (as it can't depend on anything).
glibc seems to get by just fine without mutexes
-mike
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