gistfile1.txt

dogbert@dogbert-VirtualBox ~/repos/rakudo $ ./perl6-gdb-m t/spec/S32-io/socket-recv-vs-read.t
================================================================================================
This is Rakudo Perl 6 running in the GNU debugger, which often allows the user to generate useful back-
traces to debug or report issues in Rakudo, the MoarVM backend or the currently running code.

This Rakudo version is 2016.11.173.ga.8.ba.26.bbe built on MoarVM version 2016.11.41.gd.2139.b.52,
running on ubuntu (14.04.3.LTS.Trusty.Tahr) / linux (3.19.0.32.generic)

Type `bt full` to generate a backtrace if applicable, type `q` to quit or `help` for help.
------------------------------------------------------------------------------------------------
Reading symbols from /home/dogbert/repos/rakudo/install/bin/moar...done.
Starting program: /home/dogbert/repos/rakudo/install/bin/moar --execname=./perl6-gdb-m --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=. /home/dogbert/repos/rakudo/perl6.moarvm --nqp-lib=blib t/spec/S32-io/socket-recv-vs-read.t
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
1..11
[New Thread 0xb6626b40 (LWP 20396)]
[New Thread 0xb5cffb40 (LWP 20397)]
[New Thread 0xb52ffb40 (LWP 20398)]
ok 1 - can recv immediately with recv (chars)
[New Thread 0xb4afeb40 (LWP 20399)]
ok 2 - can recv rest afterwards (chars)
*** Error in `/home/dogbert/repos/rakudo/install/bin/moar': double free or corruption (fasttop): 0xb5d358f0 ***

Program received signal SIGABRT, Aborted.
[Switching to Thread 0xb5cffb40 (LWP 20397)]
0xb7fdccb0 in ?? ()
(gdb) bt
#0  0xb7fdccb0 in ?? ()
#1  0xb7af34ba in malloc_printerr (action=<optimized out>, str=0xb7be5e80 "double free or corruption (fasttop)", ptr=0xb5d358f0) at malloc.c:4996
#2  0xb7af412d in _int_free (av=0xb5d00010, p=<optimized out>, have_lock=0) at malloc.c:3840
#3  0xb7d6293a in MVM_free (p=0xb5d358f0) at src/core/alloc.h:29
#4  0xb7d6323e in MVM_concblockingqueue_poll (tc=0xa2b0cc0, queue=0x804c664) at src/6model/reprs/ConcBlockingQueue.c:278
#5  0xb7d27cd5 in setup_work (tc=0xa2b0cc0) at src/io/eventloop.c:18
#6  0xb7d27dc2 in async_handler (handle=0xb5300468) at src/io/eventloop.c:41
#7  0xb7dde325 in uv.async_event () from //home/dogbert/repos/rakudo/install/lib/libmoar.so
#8  0xb7dde426 in uv.async_io () from //home/dogbert/repos/rakudo/install/lib/libmoar.so
#9  0xb7dda912 in uv.io_poll () from //home/dogbert/repos/rakudo/install/lib/libmoar.so
#10 0xb7dded13 in uv_run () from //home/dogbert/repos/rakudo/install/lib/libmoar.so
#11 0xb7d27e68 in enter_loop (tc=0xa2b0cc0, callsite=0xb7fd7604 <null_args_callsite>, args=0x0) at src/io/eventloop.c:60
#12 0xb7d43acb in invoke_handler (tc=0xa2b0cc0, invokee=0x8106778, callsite=0xb7fd7604 <null_args_callsite>, args=0x0) at src/6model/reprs/MVMCFunction.c:9
#13 0xb7d05a84 in thread_initial_invoke (tc=0xa2b0cc0, data=0xa2b1290) at src/core/threads.c:56
#14 0xb7cd1dd1 in MVM_interp_run (tc=0xa2b0cc0, initial_invoke=0xb7d059c0 <thread_initial_invoke>, invoke_data=0xa2b1290) at src/core/interp.c:74
#15 0xb7d05b02 in start_thread (data=0xa2b1290) at src/core/threads.c:77
#16 0xb7de8607 in uv.thread_start () from //home/dogbert/repos/rakudo/install/lib/libmoar.so
#17 0xb7a23f72 in start_thread (arg=0xb5cffb40) at pthread_create.c:312
#18 0xb7b6bf8e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129


# valgrind
dogbert@dogbert-VirtualBox ~/repos/rakudo $ ./perl6-valgrind-m t/spec/S32-io/socket-recv-vs-read.t
================================================================================================
This is Rakudo Perl 6 running in valgrind, a tool for debugging and profiling programs.
Running a program in valgrind usually takes *a lot* more time than running it directly,
so please be patient.
This Rakudo version is 2016.11.179.ga.34.f.0.afe.7 built on MoarVM version 2016.11.45.g.8627.dd.13,
running on ubuntu (14.04.3.LTS.Trusty.Tahr) / linux (3.19.0.32.generic)
------------------------------------------------------------------------------------------------
==4294== Memcheck, a memory error detector
==4294== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==4294== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==4294== Command: /home/dogbert/repos/rakudo/install/bin/moar --execname=./perl6-ugga --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=. /home/dogbert/repos/rakudo/perl6.moarvm --nqp-lib=blib t/spec/S32-io/socket-recv-vs-read.t
==4294== 
1..11
ok 1 - can recv immediately with recv (chars)
ok 2 - can recv rest afterwards (chars)
ok 3 - recv char count is not lower limit (chars)
ok 4 - recv argument serves as upper limit (chars)
==4294== Thread 3:
==4294== Invalid read of size 4
==4294==    at 0x4161E23: MVM_concblockingqueue_poll (ConcBlockingQueue.c:277)
==4294==    by 0x411D0E4: setup_work (eventloop.c:18)
==4294==    by 0x411D1D1: async_handler (eventloop.c:41)
==4294==    by 0x41E0654: uv__async_event (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E0755: uv__async_io (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41DCC41: uv__io_poll (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E1042: uv_run (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x411D277: enter_loop (eventloop.c:60)
==4294==    by 0x413C844: invoke_handler (MVMCFunction.c:9)
==4294==    by 0x40F8F0C: thread_initial_invoke (threads.c:56)
==4294==    by 0x40C2175: MVM_interp_run (interp.c:74)
==4294==    by 0x40F8F8A: start_thread (threads.c:77)
==4294==  Address 0x72642d4 is 4 bytes inside a block of size 8 free'd
==4294==    at 0x402B3D8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==4294==    by 0x41613A6: MVM_free (alloc.h:29)
==4294==    by 0x4161E36: MVM_concblockingqueue_poll (ConcBlockingQueue.c:278)
==4294==    by 0x411D0E4: setup_work (eventloop.c:18)
==4294==    by 0x411D1D1: async_handler (eventloop.c:41)
==4294==    by 0x41E0654: uv__async_event (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E0755: uv__async_io (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41DCC41: uv__io_poll (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E1042: uv_run (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x411D277: enter_loop (eventloop.c:60)
==4294==    by 0x413C844: invoke_handler (MVMCFunction.c:9)
==4294==    by 0x40F8F0C: thread_initial_invoke (threads.c:56)
==4294== 
==4294== Invalid free() / delete / delete[] / realloc()
==4294==    at 0x402B3D8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==4294==    by 0x41613A6: MVM_free (alloc.h:29)
==4294==    by 0x4161E36: MVM_concblockingqueue_poll (ConcBlockingQueue.c:278)
==4294==    by 0x411D0E4: setup_work (eventloop.c:18)
==4294==    by 0x411D1D1: async_handler (eventloop.c:41)
==4294==    by 0x41E0654: uv__async_event (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E0755: uv__async_io (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41DCC41: uv__io_poll (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E1042: uv_run (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x411D277: enter_loop (eventloop.c:60)
==4294==    by 0x413C844: invoke_handler (MVMCFunction.c:9)
==4294==    by 0x40F8F0C: thread_initial_invoke (threads.c:56)
==4294==  Address 0x72642d0 is 0 bytes inside a block of size 8 free'd
==4294==    at 0x402B3D8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==4294==    by 0x41613A6: MVM_free (alloc.h:29)
==4294==    by 0x4161E36: MVM_concblockingqueue_poll (ConcBlockingQueue.c:278)
==4294==    by 0x411D0E4: setup_work (eventloop.c:18)
==4294==    by 0x411D1D1: async_handler (eventloop.c:41)
==4294==    by 0x41E0654: uv__async_event (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E0755: uv__async_io (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41DCC41: uv__io_poll (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x41E1042: uv_run (in /home/dogbert/repos/rakudo/install/lib/libmoar.so)
==4294==    by 0x411D277: enter_loop (eventloop.c:60)
==4294==    by 0x413C844: invoke_handler (MVMCFunction.c:9)
==4294==    by 0x40F8F0C: thread_initial_invoke (threads.c:56)
==4294== 
ok 5 - can recv immediately with recv (bytes)
ok 6 - can recv rest afterwards (bytes)
ok 7 - recv char count is not lower limit (bytes)
ok 8 - recv argument serves as upper limit (bytes)
ok 9 - read blocks until it has enough data
ok 10 - read gets the chars from across low level socket reads
ok 11 - read stops blocking when server closes connection
==4294== 
==4294== HEAP SUMMARY:
==4294==     in use at exit: 40,584,435 bytes in 298,863 blocks
==4294==   total heap usage: 616,285 allocs, 317,423 frees, 115,263,659 bytes allocated
==4294== 
==4294== LEAK SUMMARY:
==4294==    definitely lost: 5,858 bytes in 184 blocks
==4294==    indirectly lost: 14,596 bytes in 677 blocks
==4294==      possibly lost: 5,492,930 bytes in 88,459 blocks
==4294==    still reachable: 35,071,051 bytes in 209,543 blocks
==4294==         suppressed: 0 bytes in 0 blocks
==4294== Rerun with --leak-check=full to see details of leaked memory
==4294== 
==4294== For counts of detected and suppressed errors, rerun with: -v
==4294== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)