# New Ticket Created by Patrick R. Michaud
# Please include the string: [perl #40966]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=40966 >
---
osname= linux
osvers= 2.6.16
arch= x86_64-linux-thread-multi
cc= cc
---
Flags:
category=core
severity=high
ack=no
---
With the latest changes to the perl6 compiler I'm starting to see
miscellaneous core dumps from Parrot. I think it's likely GC or
pointer related, as the program in question runs correctly with the
-G flag present.
The core dump appears for me in r15764. The steps to build perl6.pbc:
1. build parrot
2. cd languages/perl6
3. make
After building the perl6.pbc compiler, running perl6.pbc on
t/00-parrot/07-op-string.t produces the core dump:
$ ../../parrot perl6.pbc t/00-parrot/07-op-string.t
parrot: src/string.c:2086: string_hash: Assertion `s->encoding &&
s->charset && !(((s)->obj.flags) & b_PObj_on_free_list_FLAG)' failed.
Aborted (core dumped)
Running with the -G flag produces the correct output:
$ ../../parrot -G perl6.pbc t/00-parrot/07-op-string.t
1..16
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
ok 8
ok 9
ok 10
ok 11
ok 12
ok 13
ok 14
ok 15
ok 16
The backtrace (complete copy below) shows the execution stack
at the time of the core dump:
#0 0x00002ba87019baa5 in raise () from /lib64/libc.so.6
#1 0x00002ba87019ce60 in abort () from /lib64/libc.so.6
#2 0x00002ba870195246 in __assert_fail () from /lib64/libc.so.6
#3 0x00002ba86f2c8220 in string_hash (interp=0x50c010, s=0x792a00, seed=3793)
at src/string.c:2086
#4 0x00002ba86f2d0718 in key_hash_STRING (interp=0x50c010, value=0x792a00,
seed=3793) at src/hash.c:62
#5 0x00002ba86f2d165e in parrot_hash_get_bucket (interp=0x50c010,
hash=0xa0ebc0, key=0x792a00) at src/hash.c:788
#6 0x00002ba86f376a52 in Parrot_Hash_exists_keyed (interp=0x50c010,
pmc=0x2aaaaae21590, key=0x0) at src/pmc/hash.pmc:858
#7 0x00002ba86f1fb64a in Parrot_exists_i_p_kc (cur_opcode=0x2aaaaac8a3d0,
interp=0x50c010) at src/ops/pmc.ops:318
#8 0x00002ba86f2cb061 in runops_slow_core (interp=0x50c010, pc=0x2aaaaac8a3d0)
at src/runops_cores.c:184
#9 0x00002ba86f2b317a in runops_int (interp=0x50c010, offset=137)
at src/interpreter.c:775
#10 0x00002ba86f2b8a3e in runops (interp=0x50c010, offs=137)
at src/inter_run.c:87
#11 0x00002ba86f2b8cd8 in runops_args (interp=0x50c010, sub=0x7e6c58,
obj=0x550350, meth=0x0, sig=0x2ba86f3e8212 "vP", ap=0x7fff3bb20470)
at src/inter_run.c:193
#12 0x00002ba86f2b8ecb in Parrot_runops_fromc_args (interp=0x50c010,
sub=0x7e6c58, sig=0x2ba86f3e8212 "vP") at src/inter_run.c:295
#13 0x00002ba86f2d9208 in Parrot_runcode (interp=0x50c010, argc=2,
argv=0x7fff3bb20790) at src/embed.c:806
#14 0x00000000004035a6 in main (argc=2, argv=0x7fff3bb20790)
at compilers/imcc/main.c:723
Thanks!
Pm
====complete transcript including backtrace====
$ ../../parrot perl6.pbc t/00-parrot/07-op-string.t
parrot: src/string.c:2086: string_hash: Assertion `s->encoding && s->charset &&
!(((s)->obj.flags) & b_PObj_on_free_list_FLAG)' failed.
Aborted (core dumped)
$ ../../parrot -G perl6.pbc t/00-parrot/07-op-string.t
1..16
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
ok 8
ok 9
ok 10
ok 11
ok 12
ok 13
ok 14
ok 15
ok 16
$ gdb ../../parrot core.26512
GNU gdb 6.4
Copyright 2005 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "x86_64-suse-linux"...Using host libthread_db
library "/lib64/libthread_db.so.1".
Core was generated by `../../parrot perl6.pbc t/00-parrot/07-op-string.t'.
Program terminated with signal 6, Aborted.
Reading symbols from
/home/pmichaud/parrot/trunk/blib/lib/libparrot.so.0.4.7...done.
Loaded symbols for /home/pmichaud/parrot/trunk/blib/lib/libparrot.so.0.4.7
Reading symbols from /lib64/libdl.so.2...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libcrypt.so.1...done.
Loaded symbols for /lib64/libcrypt.so.1
Reading symbols from /lib64/libpthread.so.0...done.
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libreadline.so.5...done.
Loaded symbols for /lib64/libreadline.so.5
Reading symbols from /lib64/libncurses.so.5...done.
Loaded symbols for /lib64/libncurses.so.5
Reading symbols from /usr/lib64/libstdc++.so.6...done.
Loaded symbols for /usr/lib64/libstdc++.so.6
Reading symbols from /lib64/libm.so.6...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/libgcc_s.so.1...done.
Loaded symbols for /lib64/libgcc_s.so.1
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from
/home/pmichaud/parrot/trunk/runtime/parrot/dynext/perl6_group.so...done.
Loaded symbols for
/home/pmichaud/parrot/trunk/runtime/parrot/dynext/perl6_group.so
#0 0x00002ba87019baa5 in raise () from /lib64/libc.so.6
(gdb) bt
#0 0x00002ba87019baa5 in raise () from /lib64/libc.so.6
#1 0x00002ba87019ce60 in abort () from /lib64/libc.so.6
#2 0x00002ba870195246 in __assert_fail () from /lib64/libc.so.6
#3 0x00002ba86f2c8220 in string_hash (interp=0x50c010, s=0x792a00, seed=3793)
at src/string.c:2086
#4 0x00002ba86f2d0718 in key_hash_STRING (interp=0x50c010, value=0x792a00,
seed=3793) at src/hash.c:62
#5 0x00002ba86f2d165e in parrot_hash_get_bucket (interp=0x50c010,
hash=0xa0ebc0, key=0x792a00) at src/hash.c:788
#6 0x00002ba86f376a52 in Parrot_Hash_exists_keyed (interp=0x50c010,
pmc=0x2aaaaae21590, key=0x0) at src/pmc/hash.pmc:858
#7 0x00002ba86f1fb64a in Parrot_exists_i_p_kc (cur_opcode=0x2aaaaac8a3d0,
interp=0x50c010) at src/ops/pmc.ops:318
#8 0x00002ba86f2cb061 in runops_slow_core (interp=0x50c010, pc=0x2aaaaac8a3d0)
at src/runops_cores.c:184
#9 0x00002ba86f2b317a in runops_int (interp=0x50c010, offset=137)
at src/interpreter.c:775
#10 0x00002ba86f2b8a3e in runops (interp=0x50c010, offs=137)
at src/inter_run.c:87
#11 0x00002ba86f2b8cd8 in runops_args (interp=0x50c010, sub=0x7e6c58,
obj=0x550350, meth=0x0, sig=0x2ba86f3e8212 "vP", ap=0x7fff3bb20470)
at src/inter_run.c:193
#12 0x00002ba86f2b8ecb in Parrot_runops_fromc_args (interp=0x50c010,
sub=0x7e6c58, sig=0x2ba86f3e8212 "vP") at src/inter_run.c:295
#13 0x00002ba86f2d9208 in Parrot_runcode (interp=0x50c010, argc=2,
argv=0x7fff3bb20790) at src/embed.c:806
#14 0x00000000004035a6 in main (argc=2, argv=0x7fff3bb20790)
at compilers/imcc/main.c:723
(gdb)
---
Summary of my parrot 0.4.7 (r15763) configuration:
configdate='Wed Nov 22 10:32:12 2006'
Platform:
osname=linux, archname=x86_64-linux-thread-multi
jitcapable=0, jitarchname=nojit,
jitosname=linux, jitcpuarch=x86_64
execcapable=0
perl=/usr/bin/perl
Compiler:
cc='ccache gcc', ccflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS
-DDEBUGGING -pipe -Wdeclaration-after-statement -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -fPIC',
Linker and Libraries:
ld='ccache g++', ldflags=' -L/usr/local/lib64',
cc_ldflags='',
libs='-lm -ldl -lcrypt -lpthread -lrt -lreadline -lncurses'
Dynamic Linking:
share_ext='.so', ld_share_flags='-shared -L/usr/local/lib64 -fPIC',
load_ext='.so', ld_load_flags='-shared -L/usr/local/lib64 -fPIC'
Types:
iv=long, intvalsize=8, intsize=4, opcode_t=long, opcode_t_size=8,
ptrsize=8, ptr_alignment=1 byteorder=12345678,
nv=double, numvalsize=8, doublesize=8
---
Environment:
HOME LANG LANGUAGE LD_LIBRARY_PATH LOGDIR PATH SHELL
