Latest stable (r287104) bash leaves zombies on exit

[Michiel Boland]

On 08/27/2015 22:16, Konstantin Belousov wrote:
[...]
> I just verified that the signal handler is correctly wrapped for me, on
> the latest stable/10.  Both with the pre-linked libthr.so and with the
> library loaded dynamically at runtime.  I used the test program at the
> end of the message, put breakpoint on the sigusr2_handler, and looked
> at the backtrace, which must include thr_sighandler().  It did in my
> case, for binary built with and without -lpthread.
>
> Can you verify the presence of thr_sighandler() in the backtrace for
> this test program, on your system ?

Verified, see below.
Cheers
Michiel

Breakpoint 1, sigusr2_handler (signo=31, si=0x7fffffffe430, u=0x7fffffffe0c0)
     at rtld_sigresolv.c:24
24              wait(NULL);
Current language:  auto; currently minimal
(gdb) bt
#0  sigusr2_handler (signo=31, si=0x7fffffffe430, u=0x7fffffffe0c0)
     at rtld_sigresolv.c:24
#1  0x000000080100d947 in handle_signal (actp=<value optimized out>, sig=31,
     info=0x7fffffffe430, ucp=0x7fffffffe0c0)
     at /usr/src/lib/libthr/thread/thr_sig.c:243
#2  0x000000080100d158 in thr_sighandler (sig=<value optimized out>,
     info=<value optimized out>, _ucp=<value optimized out>)
     at /usr/src/lib/libthr/thread/thr_sig.c:188
#3  <signal handler called>
#4  thr_kill () at thr_kill.S:3
#5  0x0000000800965066 in __raise (s=<value optimized out>)
     at /usr/src/lib/libc/gen/raise.c:51
#6  0x0000000000400c72 in atexit_code () at rtld_sigresolv.c:31
#7  0x000000080093d406 in __cxa_finalize (dso=0x0)
     at /usr/src/lib/libc/stdlib/atexit.c:200
#8  0x00000008008de92c in exit (status=0) at /usr/src/lib/libc/stdlib/exit.c:67
#9  0x0000000000400946 in _start (ap=<value optimized out>,
     cleanup=<value optimized out>) at /usr/src/lib/csu/amd64/crt1.c:78
#10 0x0000000800621000 in ?? ()
#11 0x0000000000000000 in ?? ()