mhttpd crash - safari 12.1.2 - macOS 10.14.6

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Issue #190 resolved
Andreas Suter created an issue

when accessing midas (55a48a78e2d328) via macOS 10.14.6 - safari 12.1.2, the mhttpd is crashing
when a page auto reloads (e.g. messages, history).

stack trace:

(gdb) thr 1
[Switching to thread 1 (Thread 0x7f57ceffd700 (LWP 3538))]
#0  0x00007f57f29fe377 in raise () from /lib64/
(gdb) bt
#0  0x00007f57f29fe377 in raise () from /lib64/
#1  0x00007f57f29ffa68 in abort () from /lib64/
#2  0x00007f57f330e7d5 in __gnu_cxx::__verbose_terminate_handler() () from
#3  0x00007f57f330c746 in ?? () from /lib64/
#4  0x00007f57f330c773 in std::terminate() () from /lib64/
#5  0x00007f57f330c993 in __cxa_throw () from /lib64/
#6  0x00007f57f330cf2d in operator new(unsigned long) () from /lib64/
#7  0x00007f57f336ba19 in std::string::_Rep::_S_create(unsigned long, unsigned long,
std::allocator<char> const&)
    () from /lib64/
#8  0x00007f57f336c62b in std::string::_Rep::_M_clone(std::allocator<char> const&,
unsigned long) ()
   from /lib64/
#9  0x00007f57f336ccfc in std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string(std::string const&) () from /lib64/
#10 0x000000000041ce0f in check_digest_auth (hm=hm@entry=0x7f57ceffc520, auth=0x74b060
    at /home/nemu/nemu/tmidas/midas/progs/mhttpd.cxx:17143
#11 0x0000000000452a61 in handle_http_message (msg=0x7f57ceffc520, nc=0x2019ca0,
this=<optimized out>, 
    this=<optimized out>, this=<optimized out>) at
#12 handle_http_event_mg (nc=nc@entry=0x2019ca0, ev=ev@entry=100,
    at /home/nemu/nemu/tmidas/midas/progs/mhttpd.cxx:17753
#13 0x0000000000464c4b in mg_call (nc=nc@entry=0x2019ca0, 
    ev_handler=0x4521f0 <handle_http_event_mg(mg_connection*, int, void*)>, ev=100, 
    ev_data=ev_data@entry=0x7f57ceffc520) at
#14 0x000000000046790e in mg_http_call_endpoint_handler (nc=nc@entry=0x2019ca0,
ev=<optimized out>, 
    hm=hm@entry=0x7f57ceffc520) at /home/nemu/nemu/tmidas/midas/progs/mongoose6.cxx:4946
#15 0x0000000000467e3f in mg_http_handler (nc=nc@entry=0x2019ca0, ev=ev@entry=3, 
    ev_data=ev_data@entry=0x7f57ceffcb2c) at
#16 0x0000000000464c4b in mg_call (nc=nc@entry=0x2019ca0, 
    ev_handler=0x467a20 <mg_http_handler(mg_connection*, int, void*)>,
ev_handler@entry=0x0, ev=ev@entry=3, 
    ev_data=ev_data@entry=0x7f57ceffcb2c) at
#17 0x0000000000464fb7 in mg_recv_common (nc=nc@entry=0x2019ca0,
buf=buf@entry=0x7f57c0000cd0, len=len@entry=279)
    at /home/nemu/nemu/tmidas/midas/progs/mongoose6.cxx:2676
#18 0x00000000004659c8 in mg_if_recv_tcp_cb (len=279, buf=0x7f57c0000cd0, nc=0x2019ca0)
    at /home/nemu/nemu/tmidas/midas/progs/mongoose6.cxx:2680
#19 mg_read_from_socket (conn=0x2019ca0) at
#20 mg_mgr_handle_conn (nc=0x2019ca0, fd_flags=1, now=now@entry=1568705761.3290441)
    at /home/nemu/nemu/tmidas/midas/progs/mongoose6.cxx:3511
#21 0x0000000000465ee0 in mg_mgr_poll (mgr=mgr@entry=0x7f57ceffcda0,
    at /home/nemu/nemu/tmidas/midas/progs/mongoose6.cxx:3687
#22 0x0000000000466085 in per_connection_thread_function (param=0x2019ca0)
    at /home/nemu/nemu/tmidas/midas/progs/mongoose6.cxx:3805
#23 0x00007f57f39c7ea5 in start_thread () from /lib64/
#24 0x00007f57f2ac68cd in clone () from /lib64/

Comments (8)

  1. dd1

    Do not see the crash with macOS 10.13.6 - safari 12.1.2. But I am puzzled by the reference to “page auto reloads” - the messages page does not autoreload. (the old history page does autoreload, the new history plot page does not). K.O.

  2. Andreas Suter reporter

    Sorry, wrong wording, reference to old times. What I meant is it updates/refreshes automatically as soon as there are new data.

  3. dd1

    Please confirm: you are using mhttpd built-in https server and you use the mhttpd password file, yes? K.O.

  4. dd1

    I disabled the non-thread-safe read_passwords(). Can you update to the head of midas-2019-09 and try again? (the version you use is same as the midas-2019-09 branch right where it branched off “develop”). You can try “git pull; git checkout midas-2019-09-c”. K.O.

  5. dd1

    I will reenable re-reading the password file in mongoose616 as all password processing is now done in the main thread. K.O.

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