[ruby-core:58269] [ruby-trunk - Bug #8326] Running Redmine unter Ruby 2.0.0 produces an "Illegal instruction(coredump)" under AIX 7.1

Issue #8326 has been updated by kaustubh (Kaustubh  D).


We are facing similar issue (similar stack trace) in our tests. Our observation is, if we build ruby in non-optimized mode or 'even if we have ruby optimized (-O) but gc.c built without optimization' we do not see core dump. This might indicate that some code in gc.c is getting optimized away that leads to this issue.

It core dumps randomly but most of the times within st_lookup. We are not able to reproduce with a simple program yet.

Illegal instruction (illegal opcode) in . at 0x0 ($t1102)
warning: Unable to access address 0x0 from core
(dbx) where
.() at 0x0
st_lookup() at 0x9000000009fcb30
vm.rb_eval_string_wrap.search_method@AF293_120() at 0x9000000009df2a0
rb_method_entry_get_without_cache() at 0x9000000009d207c
vm_exec_core() at 0x9000000009cb79c
vm_exec() at 0x9000000009c4488
rb_vm_invoke_proc() at 0x9000000009d1518
thread_start_func_2() at 0x900000000a2ad2c
thread.native_thread_create.thread_start_func_1() at 0x900000000a299e8

Not sure if this is anyway related, but found issue which happened in optimized builds of ruby but non-optimized had worked. http://bugs.ruby-lang.org/issues/5244. The fix of this issue #5244 relied on "register window" concept and as per inputs from IBM, register window does not apply to power architecture.

Any inputs from ruby core team might be helpful. Thanks in advance.

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Bug #8326: Running Redmine unter Ruby 2.0.0 produces an "Illegal instruction(coredump)" under AIX 7.1
https://bugs.ruby-lang.org/issues/8326#change-42856

Author: wnovak (Werner Novak)
Status: Open
Priority: Normal
Assignee: kanemoto (Yutaka Kanemoto)
Category: 
Target version: current: 2.1.0
ruby -v: ruby 2.0.0p0 (2013-02-24 revision 39474) [powerpc-aix6.1.0.0]
Backport: 1.9.3: REQUIRED, 2.0.0: REQUIRED


We compiled Ruby under AIX 7.1 and everthing work fine throughout testing, but when we install Redmine 2.3.0 an go through the normal navigation, we can reproduce the following error by only clicking multiple links consecutively in the administration.

#>dbx /opt/pware/ruby/2.0.0/bin/ruby core
Type 'help' for help.
[using memory image in core]
reading symbolic information ...

Illegal instruction (illegal opcode) in . at 0x0 ($t8)
warning: Unable to access address 0x0 from core
(dbx) where
.() at 0x0
st_lookup(table = 0xd40c0708, key = 24, value = 0x1bd78365), line 414 in "st.c"
unnamed block in rb_method_entry_get_without_cache(klass = 3557309396, id = 624245420, defined_class_ptr = 0x24098d30), line 182 in "vm_method.c"
rb_method_entry_get_without_cache(klass = 3557309396, id = 624245420, defined_class_ptr = 0x24098d30), line 182 in "vm_method.c"
vm_search_method(ci = 0x20596bd4, recv = 624186940), line 858 in "vm_insnhelper.c"
unnamed block in vm_exec_core(th = (nil), initial = 0), line 2534 in "insns.def"
vm_exec_core(th = (nil), initial = 0), line 2534 in "insns.def"
unnamed block in vm_exec(th = 0x2311cc58), line 1175 in "vm.c"
unnamed block in vm_exec(th = 0x2311cc58), line 1175 in "vm.c"
unnamed block in vm_exec(th = 0x2311cc58), line 1175 in "vm.c"
vm_exec(th = 0x2311cc58), line 1175 in "vm.c"
vm_invoke_proc(th = 0x2311cc58, proc = 0x22e59108, self = 594118620, defined_class = 550801940, argc = 0, argv = 0x21d85144, blockptr = (nil)), line 648 in "vm.c"
thread_start_func_2(th = 0x2311cc58, stack_start = (nil)), line 503 in "thread.c"
unnamed block in thread_start_func_1(th_ptr = (nil)), line 724 in "thread_pthread.c"
thread_start_func_1(th_ptr = (nil)), line 724 in "thread_pthread.c"
(dbx)

I can deliver the coredump also, but it has 92mb (zipped 22mb) !!

Additional Infos:
Environment:
  Redmine version                          2.3.0.stable
  Ruby version                             2.0.0 (powerpc-aix6.1.0.0)
  Rails version                            3.2.13
  Environment                              production
  Database adapter                         SQLite
Redmine plugins:
  redmine_ldap_sync                        2.0.0.devel

OS Infos:
#> oslevel -s
7100-02-02-1316
#> rpm -qa
libiconv-1.14-321
libconfuse-2.7-321
expat-2.1.0-321
unzip-5.51-1
lsof-4.61-3
zlib-1.2.7-321
nrpe-2.14-321
texinfo-4.13a-321
readline-6.2-321
bzip2-1.0.6-321
gettext-0.10.40-8
gmond-3.4.0-321
gdbm-1.10-321
gmp-5.0.5-321
file-5.14-321
sqlite-3.7.15.2-321
libffi-3.0.11-321
pkg-config-0.25-321
pcre-8.31-321
libtool-2.4.2-321
AIX-rpm-7.1.2.15-6
apr-1.4.6-321
nagios-plugins-1.4.16-321
openssl-1.0.1e-321
libidn-1.26-321
perl-5.16.3-321
neon-0.29.6-321
db-5.3.21-321
openldap-2.4.33-321
apr-util-1.5.1-321
httpd-2.4.4-321
coreutils-8.5-321
tcl-8.5.13-321
tk-8.5.13-321
Python-2.7.3-321
subversion-1.7.9-321
libxml2-2.9.0-321
xz-5.0.4-321
libxslt-1.1.28-321
libgcrypt-1.5.0-321
libgpg-error-1.10-321
samba-3.6.12-321
ruby-2.0.0-321
libssh2-1.4.3-321
curl-7.29.0-321

All modules wher compiled with:
IBM XL C/C++ for AIX, V10.1
Version: 10.01.0000.0017




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