On Thu, Aug 4, 2022 at 10:05 AM Richard Purdie <
richard.purdie@linuxfoundation.org> wrote:

> Just to note that where we've been seeing pseudo hangs in rust, it
> seems jemalloc calls obtain_malloc_conf() which calls readlink() which
> pseudo intercepts and then calls malloc() which loops back to jemalloc
> which deadlocks. What fun.


I guess pseudo is doing this extra malloc right ? Maybe disable
instrumentation in jemalloc when building non target packages. This might
avoid the issue at least

>
>
> #0  0x00007f3806c84bcf in __lll_lock_wait () from
> /home/pokybuild/yocto-worker/qemumips64/build/build/tmp/sysroots-uninative/x86_64-linux/lib/libc.so.6
> #1  0x00007f3806c8aec2 in pthread_mutex_lock () from
> /home/pokybuild/yocto-worker/qemumips64/build/build/tmp/sysroots-uninative/x86_64-linux/lib/libc.so.6
> #2  0x00005629da227a0e in malloc_mutex_lock_final (mutex=0x5629da45a288
> <init_lock>) at include/jemalloc/internal/mutex.h:155
> #3  _rjem_je_malloc_mutex_lock_slow (mutex=0x5629da45a288 <init_lock>) at
> src/mutex.c:85
> #4  0x00005629da1ffddb in malloc_mutex_lock (tsdn=0x0, mutex=<optimized
> out>) at include/jemalloc/internal/mutex.h:221
> #5  malloc_init_hard () at src/jemalloc.c:1739
> #6  0x00005629da1fa2ee in malloc_init () at src/jemalloc.c:223
> #7  imalloc_init_check (sopts=<optimized out>, dopts=<optimized out>) at
> src/jemalloc.c:2229
> #8  imalloc (sopts=<optimized out>, dopts=<optimized out>) at
> src/jemalloc.c:2260
> #9  _rjem_je_malloc_default (size=101) at src/jemalloc.c:2289
> #10 0x00007f3806c998fe in strdup () from
> /home/pokybuild/yocto-worker/qemumips64/build/build/tmp/sysroots-uninative/x86_64-linux/lib/libc.so.6
> #11 0x00007f380b19da1b in pseudo_set_value () from
> /home/pokybuild/yocto-worker/qemumips64/build/build/tmp/sysroots-components/x86_64/pseudo-native/usr/lib/pseudo/lib64/libpseudo.so
> #12 0x00007f380b19dbb9 in pseudo_init_util () from
> /home/pokybuild/yocto-worker/qemumips64/build/build/tmp/sysroots-components/x86_64/pseudo-native/usr/lib/pseudo/lib64/libpseudo.so
> #13 0x00007f380b16bd01 in ?? () from
> /home/pokybuild/yocto-worker/qemumips64/build/build/tmp/sysroots-components/x86_64/pseudo-native/usr/lib/pseudo/lib64/libpseudo.so
> #14 0x00007f380b19125d in readlink () from
> /home/pokybuild/yocto-worker/qemumips64/build/build/tmp/sysroots-components/x86_64/pseudo-native/usr/lib/pseudo/lib64/libpseudo.so
> #15 0x00005629da1fe07b in obtain_malloc_conf (which_source=2,
> buf=0x7ffca80e7cc0 "\320~\016\250\374\177") at src/jemalloc.c:980
> #16 malloc_conf_init_helper (sc_data=sc_data@entry=0x0,
> bin_shard_sizes=bin_shard_sizes@entry=0x0, initial_call=true,
> opts_cache=opts_cache@entry=0x7ffca80e6260, buf=<optimized out>,
>     buf@entry=0x7ffca80e7cc0 "\320~\016\250\374\177") at
> src/jemalloc.c:1038
> #17 0x00005629da1fdcac in malloc_conf_init (sc_data=0x7ffca80e6310,
> bin_shard_sizes=0x7ffca80e6280) at src/jemalloc.c:1445
> #18 malloc_init_hard_a0_locked () at src/jemalloc.c:1505
> #19 0x00005629da1fff46 in malloc_init_hard () at src/jemalloc.c:1750
> #20 0x00005629da1fa2ee in malloc_init () at src/jemalloc.c:223
>
> Cheers,
>
> Richard
>
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