Finally, we found out in this case we also need to call pypy_setup_home() in the thread attach.

In 1st thread:
rpython_startup_code();
pypy_setup_home("..", 1);
pypy_init_threads();

And in the following threads:
pypy_setup_home("..", 1);
pypy_thread_attach();



On Sat, Sep 12, 2015 at 3:07 PM, Yicong Huang <hengha.mao@gmail.com> wrote:
With some experiments, we found out the method might have some problems if thread which call pypy_init_thread() exited before the later thread call pypy_thread_attach().

Here is the log output: (the thread 6443 call pypy_init_threads() and the thread 6343 later call pypy_thread_attach() )
PypyEnviron inited with thread, id::6343
PypyEnviron inited with thread attach, id::6443

Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f4b9eba7b82 in rpyvmprof_f_pypy_rrr () from /usr/local/pypy/libpypy-c.so
[Current thread is 1 (Thread 0x46557940 (LWP 6443))]
(gdb) bt
#0  0x00007f4b9eba7b82 in rpyvmprof_f_pypy_rrr () from /usr/local/pypy/libpypy-c.so
#1  0x00007f4b9f86897a in rpyvmprof_t_pypy_rrr () from /usr/local/pypy/libpypy-c.so
#2  0x00007f4b9eb62ad4 in pypy_g_appexec___src__glob___________________import_sys () from /usr/local/pypy/libpypy-c.so
#3  0x00007f4b9eaba80b in pypy_g.pypy_execute_source () from /usr/local/pypy/libpypy-c.so
#4  0x00007f4b9eaba994 in pypy_g_pypy_execute_source_ptr () from /usr/local/pypy/libpypy-c.so
#5  0x00007f4b9e8a7f42 in pypy_execute_source_ptr () from /usr/local/pypy/libpypy-c.so
#6  0x00007f4b9e8a7d82 in pypy_execute_source () from /usr/local/pypy/libpypy-c.so

The output of asm looks quite similar as previous.

Dump of assembler code for function rpyvmprof_f_pypy_rrr:
   0x00007f4b9eba7b40 <+0>:     41 57   push   %r15
   0x00007f4b9eba7b42 <+2>:     41 56   push   %r14
   0x00007f4b9eba7b44 <+4>:     41 55   push   %r13
   0x00007f4b9eba7b46 <+6>:     41 54   push   %r12
   0x00007f4b9eba7b48 <+8>:     49 89 d5        mov    %rdx,%r13
   0x00007f4b9eba7b4b <+11>:    55      push   %rbp
   0x00007f4b9eba7b4c <+12>:    53      push   %rbx
   0x00007f4b9eba7b4d <+13>:    49 89 f4        mov    %rsi,%r12
   0x00007f4b9eba7b50 <+16>:    48 89 fb        mov    %rdi,%rbx
   0x00007f4b9eba7b53 <+19>:    48 83 ec 18     sub    $0x18,%rsp
   0x00007f4b9eba7b57 <+23>:    e8 74 ee b6 00  callq  0x7f4b9f7169d0 <pypy_g_stack_check___>
   0x00007f4b9eba7b5c <+28>:    48 83 3d 1c 66 94 02 00 cmpq   $0x0,0x294661c(%rip)        # 0x7f4ba14ee180 <pypy_g_ExcData>
   0x00007f4b9eba7b64 <+36>:    0f 85 36 01 00 00       jne    0x7f4b9eba7ca0 <rpyvmprof_f_pypy_rrr+352>
   0x00007f4b9eba7b6a <+42>:    66 48 8d 3d 8e b3 2f 01 data16 lea 0x12fb38e(%rip),%rdi        # 0x7f4b9fea2f00
   0x00007f4b9eba7b72 <+50>:    66 66 48 e8 6e ec cf ff data16 data16 callq 0x7f4b9e8a67e8 <__tls_get_addr@plt>
   0x00007f4b9eba7b7a <+58>:    f6 43 04 01     testb  $0x1,0x4(%rbx)
   0x00007f4b9eba7b7e <+62>:    48 8b 68 30     mov    0x30(%rax),%rbp
=> 0x00007f4b9eba7b82 <+66>:    4c 8b 75 48     mov    0x48(%rbp),%r14
   0x00007f4b9eba7b86 <+70>:    0f 85 4c 01 00 00       jne    0x7f4b9eba7cd8 <rpyvmprof_f_pypy_rrr+408>
   0x00007f4b9eba7b8c <+76>:    f6 45 04 01     testb  $0x1,0x4(%rbp)
   0x00007f4b9eba7b90 <+80>:    4c 89 73 18     mov    %r14,0x18(%rbx)
   0x00007f4b9eba7b94 <+84>:    0f 85 2e 01 00 00       jne    0x7f4b9eba7cc8 <rpyvmprof_f_pypy_rrr+392>
   0x00007f4b9eba7b9a <+90>:    48 89 5d 48     mov    %rbx,0x48(%rbp)
   0x00007f4b9eba7b9e <+94>:    48 89 de        mov    %rbx,%rsi
   0x00007f4b9eba7ba1 <+97>:    48 89 ef        mov    %rbp,%rdi

And with "info thread", we confirmed that the thread 6343 was no longer existed:

(gdb) info thread
  Id   Target Id         Frame
  121  Thread 0x4584a940 (LWP 6306) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  120  Thread 0x45648940 (LWP 6302) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  119  Thread 0x43527940 (LWP 6261) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  118  Thread 0x41c32940 (LWP 6219) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  117  Thread 0x43224940 (LWP 6258) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  116  Thread 0x45042940 (LWP 6295) 0x00007f4ba1f55901 in nanosleep () from /lib64/libc.so.6
  115  Thread 0x45a4c940 (LWP 6309) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  114  Thread 0x41b31940 (LWP 6218) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  113  Thread 0x43628940 (LWP 6262) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  112  Thread 0x42f21940 (LWP 6255) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  111  Thread 0x42416940 (LWP 6244) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  110  Thread 0x40b9a940 (LWP 6227) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  109  Thread 0x44335940 (LWP 6277) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  108  Thread 0x44436940 (LWP 6278) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  107  Thread 0x42618940 (LWP 6246) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  106  Thread 0x44e40940 (LWP 6293) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  105  Thread 0x40a99940 (LWP 6217) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  104  Thread 0x4121f940 (LWP 6243) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  103  Thread 0x402a3940 (LWP 6240) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  102  Thread 0x43729940 (LWP 6263) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  101  Thread 0x42c1e940 (LWP 6252) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  100  Thread 0x42315940 (LWP 6241) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  99   Thread 0x42214940 (LWP 6239) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  98   Thread 0x40992940 (LWP 6229) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  97   Thread 0x44234940 (LWP 6276) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  96   Thread 0x44537940 (LWP 6279) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  95   Thread 0x4281a940 (LWP 6248) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  94   Thread 0x44d3f940 (LWP 6292) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  93   Thread 0x4382a940 (LWP 6266) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  92   Thread 0x4291b940 (LWP 6249) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  91   Thread 0x44638940 (LWP 6280) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  90   Thread 0x4101d940 (LWP 6231) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  89   Thread 0x44133940 (LWP 6275) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  88   Thread 0x44c3e940 (LWP 6291) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  87   Thread 0x47466940 (LWP 6434) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  86   Thread 0x43a2c940 (LWP 6268) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  85   Thread 0x47b6d940 (LWP 6441) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  84   Thread 0x46c5e940 (LWP 6426) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  83   Thread 0x47062940 (LWP 6430) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  82   Thread 0x42a1c940 (LWP 6250) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  81   Thread 0x41d33940 (LWP 6237) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  80   Thread 0x403a4940 (LWP 6283) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  79   Thread 0x42012940 (LWP 6233) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  78   Thread 0x43f31940 (LWP 6273) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  77   Thread 0x47567940 (LWP 6435) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  76   Thread 0x4483a940 (LWP 6287) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  75   Thread 0x43c2e940 (LWP 6270) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  74   Thread 0x46d5f940 (LWP 6427) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  73   Thread 0x4786a940 (LWP 6438) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  72   Thread 0x46b5d940 (LWP 6425) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  71   Thread 0x47264940 (LWP 6432) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  70   Thread 0x46f61940 (LWP 6429) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  69   Thread 0x44739940 (LWP 6284) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  68   Thread 0x43426940 (LWP 6260) 0x00007f4ba1f55901 in nanosleep () from /lib64/libc.so.6
  67   Thread 0x41e4a940 (LWP 6235) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  66   Thread 0x42b1d940 (LWP 6251) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
---Type <return> to continue, or q <return> to quit---
  65   Thread 0x47668940 (LWP 6436) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  64   Thread 0x45e50940 (LWP 6313) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  63   Thread 0x46658940 (LWP 6447) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  62   Thread 0x45345940 (LWP 6298) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  61   Thread 0x43d2f940 (LWP 6271) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  60   Thread 0x46e60940 (LWP 6428) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  59   Thread 0x4796b940 (LWP 6439) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  58   Thread 0x46a5c940 (LWP 6423) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  57   Thread 0x47365940 (LWP 6433) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  56   Thread 0x46355940 (LWP 6318) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  55   Thread 0x404a5940 (LWP 6285) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  54   Thread 0x43123940 (LWP 6257) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  53   Thread 0x45547940 (LWP 6300) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  52   Thread 0x47769940 (LWP 6437) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  51   Thread 0x45749940 (LWP 6304) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  50   Thread 0x43e30940 (LWP 6272) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  49   Thread 0x4685a940 (LWP 6421) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  48   Thread 0x416e8940 (LWP 6445) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  47   Thread 0x47a6c940 (LWP 6440) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  46   Thread 0x406b6940 (LWP 6242) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  45   Thread 0x46456940 (LWP 6319) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  44   Thread 0x405a6940 (LWP 6286) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  43   Thread 0x45244940 (LWP 6297) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  42   Thread 0x43022940 (LWP 6256) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  41   Thread 0x44032940 (LWP 6274) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  40   Thread 0x4695b940 (LWP 6422) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  39   Thread 0x42113940 (LWP 6238) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  38   Thread 0x46254940 (LWP 6317) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  37   Thread 0x47163940 (LWP 6431) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  36   Thread 0x45143940 (LWP 6296) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  35   Thread 0x41ecb940 (LWP 6307) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  34   Thread 0x45b4d940 (LWP 6310) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  33   Thread 0x44b3d940 (LWP 6290) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  32   Thread 0x43b2d940 (LWP 6269) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  31   Thread 0x46759940 (LWP 6420) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  30   Thread 0x42719940 (LWP 6247) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  29   Thread 0x41485940 (LWP 6223) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  28   Thread 0x417e9940 (LWP 6234) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  27   Thread 0x46153940 (LWP 6316) 0x00007f4ba1f55901 in nanosleep () from /lib64/libc.so.6
  26   Thread 0x40f1c940 (LWP 6230) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  25   Thread 0x45f51940 (LWP 6314) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  24   Thread 0x45d4f940 (LWP 6312) 0x00007f4ba1f55901 in nanosleep () from /lib64/libc.so.6
  23   Thread 0x40d1a940 (LWP 6212) 0x00007f4ba1f55901 in nanosleep () from /lib64/libc.so.6
  22   Thread 0x44f41940 (LWP 6294) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  21   Thread 0x46052940 (LWP 6315) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  20   Thread 0x45c4e940 (LWP 6311) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  19   Thread 0x4594b940 (LWP 6308) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  18   Thread 0x45446940 (LWP 6299) 0x00007f4ba3c5bf59 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  17   Thread 0x4493b940 (LWP 6288) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  16   Thread 0x44a3c940 (LWP 6289) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  15   Thread 0x42e20940 (LWP 6254) 0x00007f4ba3c5dd91 in sem_wait () from /lib64/libpthread.so.0
  14   Thread 0x4392b940 (LWP 6267) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  13   Thread 0x43325940 (LWP 6259) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  12   Thread 0x42517940 (LWP 6245) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  11   Thread 0x42d1f940 (LWP 6253) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  10   Thread 0x418ea940 (LWP 6236) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  9    Thread 0x41384940 (LWP 6213) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
  8    Thread 0x4111e940 (LWP 6232) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  7    Thread 0x41586940 (LWP 6224) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  6    Thread 0x40854940 (LWP 6222) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  5    Thread 0x4014e940 (LWP 6228) 0x00007f4ba1f8fd98 in epoll_wait () from /lib64/libc.so.6
  4    Thread 0x7f4ba9c048b0 (LWP 6056) 0x00007f4ba1f55901 in nanosleep () from /lib64/libc.so.6
  3    Thread 0x41a30940 (LWP 6446) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
  2    Thread 0x40e1b940 (LWP 6444) 0x00007f4ba3c5c1c0 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
* 1    Thread 0x46557940 (LWP 6443) 0x00007f4b9eba7b82 in rpyvmprof_f_pypy_rrr () from /usr/local/pypy/libpypy-c.so