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Re: [Bug-apl] Crash with stack trace

From: Juergen Sauermann
Subject: Re: [Bug-apl] Crash with stack trace
Date: Tue, 17 Jan 2017 20:14:18 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 
Hi Elias,
do you by chance know if this happens with *⎕SQ**L *or with SQL as native function or both? 

Looks like the dump is coming from the SQL area.

I remember that I replaced

*map<const string, Provider *> providers;**
*
in *apl-squlite.cc*

with:

*static Simple_string<Provider *, false> providers;**
**static Simple_string<Connection *, false> connections;*
in *Quad_SQL.cc*, mainly because the *map<...> *stuff crashed on start-up of apl (the *⎕SQL *constructor is called much earlier than native functions). But maybe I did somewthing wrong, 
in paricular with the *connections*.

/// Jürgen


On 01/17/2017 05:38 PM, Elias Mårtenson wrote:
I'm regularly getting a crash that I have not seen before. I don't know when it was introduced but it must be within the last few months. Here's the stack trace: 

==============================================================================
Assertion failed: items
in Function:      at
in file:          ../Simple_string.hh:276

Call stack:

----------------------------------------
-- Stack trace at ../Simple_string.hh:276
----------------------------------------
0x7f148e5e65ca
0x7f148d0f0210  connection_loop(void*)
0x7f148d0f288e   NetworkConnection::run()
0x7f148d0f1f0e NetworkConnection::process_command(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) *** Error in `/home/user/src/apl/dist/bin/apl': munmap_chunk(): invalid pointer: 0x00007f148c88bfb0 *** 
======= Backtrace: =========
/lib64/libc.so.6(+0x7570b)[0x7f148d37c70b]
/lib64/libc.so.6(cfree+0x1a8)[0x7f148d388568]
/lib64/libstdc++.so.6(__cxa_demangle+0x108)[0x7f148dc84488]
/home/user/src/apl/dist/bin/apl(_ZN9Backtrace9show_itemEiPc+0x124)[0x45b9f4]
/home/user/src/apl/dist/bin/apl(_ZN9Backtrace4showEPKci+0x1ff)[0x45bdef]
/home/user/src/apl/dist/bin/apl(_Z9do_AssertPKcS0_S0_i+0x1c8)[0x459c38]
/home/user/src/apl/dist/lib/apl/libemacs.so(_ZN9FnCommand11run_commandER17NetworkConnectionRKSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaIS8_EE+0x9c7)[0x7f148d0ebf97]
/home/user/src/apl/dist/lib/apl/libemacs.so(_ZN17NetworkConnection15process_commandERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0x79e)[0x7f148d0f1f0e]
/home/user/src/apl/dist/lib/apl/libemacs.so(_ZN17NetworkConnection3runEv+0x2e)[0x7f148d0f288e]
/home/user/src/apl/dist/lib/apl/libemacs.so(_Z15connection_loopPv+0x10)[0x7f148d0f0210]
/lib64/libpthread.so.0(+0x75ca)[0x7f148e5e65ca]
/lib64/libc.so.6(clone+0x6d)[0x7f148d40a0ed]
======= Memory map: ========
00400000-0061c000 r-xp 00000000 ca:10 131135 /home/user/src/apl/dist/bin/apl 0081b000-0081c000 r--p 0021b000 ca:10 131135 /home/user/src/apl/dist/bin/apl 0081c000-0081f000 rw-p 0021c000 ca:10 131135 /home/user/src/apl/dist/bin/apl 
0081f000-008b1000 rw-p 00000000 00:00 0
0289c000-0290d000 rw-p 00000000 00:00 0 [heap] 
7f1480000000-7f1480021000 rw-p 00000000 00:00 0
7f1480021000-7f1484000000 ---p 00000000 00:00 0
7f1488000000-7f1488021000 rw-p 00000000 00:00 0
7f1488021000-7f148c000000 ---p 00000000 00:00 0
7f148c03d000-7f148c03e000 ---p 00000000 00:00 0
7f148c03e000-7f148c88e000 rw-p 00000000 00:00 0
7f148c88e000-7f148c88f000 ---p 00000000 00:00 0
7f148c88f000-7f148d0df000 rw-p 00000000 00:00 0
7f148d0df000-7f148d105000 r-xp 00000000 ca:10 131125 /home/user/src/apl/dist/lib/apl/libemacs.so.0.0.0 7f148d105000-7f148d305000 ---p 00026000 ca:10 131125 /home/user/src/apl/dist/lib/apl/libemacs.so.0.0.0 7f148d305000-7f148d306000 r--p 00026000 ca:10 131125 /home/user/src/apl/dist/lib/apl/libemacs.so.0.0.0 7f148d306000-7f148d307000 rw-p 00027000 ca:10 131125 /home/user/src/apl/dist/lib/apl/libemacs.so.0.0.0 7f148d307000-7f148d4c0000 r-xp 00000000 fb:00 395734 /usr/lib64/libc-2.23.so <http://libc-2.23.so> 7f148d4c0000-7f148d6bf000 ---p 001b9000 fb:00 395734 /usr/lib64/libc-2.23.so <http://libc-2.23.so> 7f148d6bf000-7f148d6c3000 r--p 001b8000 fb:00 395734 /usr/lib64/libc-2.23.so <http://libc-2.23.so> 7f148d6c3000-7f148d6c5000 rw-p 001bc000 fb:00 395734 /usr/lib64/libc-2.23.so <http://libc-2.23.so> 
7f148d6c5000-7f148d6c9000 rw-p 00000000 00:00 0
7f148d6c9000-7f148d6df000 r-xp 00000000 fb:00 437012 /usr/lib64/libgcc_s-6.3.1-20161221.so.1 7f148d6df000-7f148d8de000 ---p 00016000 fb:00 437012 /usr/lib64/libgcc_s-6.3.1-20161221.so.1 7f148d8de000-7f148d8df000 r--p 00015000 fb:00 437012 /usr/lib64/libgcc_s-6.3.1-20161221.so.1 7f148d8df000-7f148d8e0000 rw-p 00016000 fb:00 437012 /usr/lib64/libgcc_s-6.3.1-20161221.so.1 7f148d8e0000-7f148d9e8000 r-xp 00000000 fb:00 395742 /usr/lib64/libm-2.23.so <http://libm-2.23.so> 7f148d9e8000-7f148dbe7000 ---p 00108000 fb:00 395742 /usr/lib64/libm-2.23.so <http://libm-2.23.so> 7f148dbe7000-7f148dbe8000 r--p 00107000 fb:00 395742 /usr/lib64/libm-2.23.so <http://libm-2.23.so> 7f148dbe8000-7f148dbe9000 rw-p 00108000 fb:00 395742 /usr/lib64/libm-2.23.so <http://libm-2.23.so> 7f148dbe9000-7f148dd61000 r-xp 00000000 fb:00 396075 /usr/lib64/libstdc++.so.6.0.22 7f148dd61000-7f148df61000 ---p 00178000 fb:00 396075 /usr/lib64/libstdc++.so.6.0.22 7f148df61000-7f148df6b000 r--p 00178000 fb:00 396075 /usr/lib64/libstdc++.so.6.0.22 7f148df6b000-7f148df6d000 rw-p 00182000 fb:00 396075 /usr/lib64/libstdc++.so.6.0.22 
7f148df6d000-7f148df71000 rw-p 00000000 00:00 0
7f148df71000-7f148df87000 r-xp 00000000 fb:00 395746 /usr/lib64/libnsl-2.23.so <http://libnsl-2.23.so> 7f148df87000-7f148e186000 ---p 00016000 fb:00 395746 /usr/lib64/libnsl-2.23.so <http://libnsl-2.23.so> 7f148e186000-7f148e187000 r--p 00015000 fb:00 395746 /usr/lib64/libnsl-2.23.so <http://libnsl-2.23.so> 7f148e187000-7f148e188000 rw-p 00016000 fb:00 395746 /usr/lib64/libnsl-2.23.so <http://libnsl-2.23.so> 
7f148e188000-7f148e18a000 rw-p 00000000 00:00 0
7f148e18a000-7f148e1b1000 r-xp 00000000 fb:00 396071 /usr/lib64/libtinfo.so.6.0 7f148e1b1000-7f148e3b1000 ---p 00027000 fb:00 396071 /usr/lib64/libtinfo.so.6.0 7f148e3b1000-7f148e3b5000 r--p 00027000 fb:00 396071 /usr/lib64/libtinfo.so.6.0 7f148e3b5000-7f148e3b6000 rw-p 0002b000 fb:00 396071 /usr/lib64/libtinfo.so.6.0 7f148e3b6000-7f148e3dd000 r-xp 00000000 fb:00 396061 /usr/lib64/libncurses.so.6.0 7f148e3dd000-7f148e5dd000 ---p 00027000 fb:00 396061 /usr/lib64/libncurses.so.6.0 7f148e5dd000-7f148e5de000 r--p 00027000 fb:00 396061 /usr/lib64/libncurses.so.6.0 7f148e5de000-7f148e5df000 rw-p 00028000 fb:00 396061 /usr/lib64/libncurses.so.6.0 7f148e5df000-7f148e5f6000 r-xp 00000000 fb:00 395762 /usr/lib64/libpthread-2.23.so <http://libpthread-2.23.so> 7f148e5f6000-7f148e7f5000 ---p 00017000 fb:00 395762 /usr/lib64/libpthread-2.23.so <http://libpthread-2.23.so> 7f148e7f5000-7f148e7f6000 r--p 00016000 fb:00 395762 /usr/lib64/libpthread-2.23.so <http://libpthread-2.23.so> 7f148e7f6000-7f148e7f7000 rw-p 00017000 fb:00 395762 /usr/lib64/libpthread-2.23.so <http://libpthread-2.23.so> 
7f148e7f7000-7f148e7fb000 rw-p 00000000 00:00 0
7f148e7fb000-7f148e7fe000 r-xp 00000000 fb:00 395740 /usr/lib64/libdl-2.23.so <http://libdl-2.23.so> 7f148e7fe000-7f148e9fd000 ---p 00003000 fb:00 395740 /usr/lib64/libdl-2.23.so <http://libdl-2.23.so> 7f148e9fd000-7f148e9fe000 r--p 00002000 fb:00 395740 /usr/lib64/libdl-2.23.so <http://libdl-2.23.so> 7f148e9fe000-7f148e9ff000 rw-p 00003000 fb:00 395740 /usr/lib64/libdl-2.23.so <http://libdl-2.23.so> 7f148e9ff000-7f148ead0000 r-xp 00000000 fb:00 396553 /usr/lib64/libsqlite3.so.0.8.6 7f148ead0000-7f148ecd0000 ---p 000d1000 fb:00 396553 /usr/lib64/libsqlite3.so.0.8.6 7f148ecd0000-7f148ecd3000 r--p 000d1000 fb:00 396553 /usr/lib64/libsqlite3.so.0.8.6 7f148ecd3000-7f148ecd5000 rw-p 000d4000 fb:00 396553 /usr/lib64/libsqlite3.so.0.8.6 
7f148ecd5000-7f148ecd6000 rw-p 00000000 00:00 0
7f148ecd6000-7f148ecfa000 r-xp 00000000 fb:00 395726 /usr/lib64/ld-2.23.so <http://ld-2.23.so> 
7f148eed6000-7f148eede000 rw-p 00000000 00:00 0
7f148eef7000-7f148eef9000 rw-p 00000000 00:00 0
7f148eef9000-7f148eefa000 r--p 00023000 fb:00 395726 /usr/lib64/ld-2.23.so <http://ld-2.23.so> 7f148eefa000-7f148eefb000 rw-p 00024000 fb:00 395726 /usr/lib64/ld-2.23.so <http://ld-2.23.so> 
7f148eefb000-7f148eefc000 rw-p 00000000 00:00 0
7fff44368000-7fff44389000 rw-p 00000000 00:00 0 [stack] 7fff443f1000-7fff443f3000 r--p 00000000 00:00 0 [vvar] 7fff443f3000-7fff443f5000 r-xp 00000000 00:00 0 [vdso] 

Process apl aborted (core dumped)
Network listener started. Connection information: mode:tcp addr:44846
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