hangs in OSX Leopard, ruby 1.9.2 at start

[rkumar]

I tried hijacking irb and get the "hijacking ..." status.

As mentioned elsewhere, i did connect to the irb process using gdb and then run bt.

Here is part of the output:
#35 0x00000001001610d5 in rb_catch_obj (tag=4050190, func=0x10017d7a0 <catch_i>, data=0) at vm_eval.c:1523
#36 0x0000000100161b00 in rb_f_catch (argc=<value temporarily unavailable, due to optimizations>, argv=<value temporarily unavailable, due to optimizations>) at vm_eval.c:1499
#37 0x0000000100165487 in vm_call_cfunc inlined at /Users/rahul/.rvm/src/ruby-1.9.2-head/vm_insnhelper.c:401
#38 0x0000000100165487 in vm_call_method (th=0x1003016a0, cfp=0x1004ffce8, num=1, blockptr=0x1004ffd11, flag=8, id=<value temporarily unavailable, due to optimizations>, me=0x10031d590, recv=4321140880) at vm_insnhelper.c:523
#39 0x0000000100168215 in vm_exec_core (th=0x1003016a0, initial=<value temporarily unavailable, due to optimizations>) at insns.def:1006
#40 0x000000010016fe53 in vm_exec (th=0x1003016a0) at vm.c:1145
#41 0x000000010017d9e1 in catch_i (tag=3214606, data=<value temporarily unavailable, due to optimizations>) at vm.c:557
#42 0x00000001001610d5 in rb_catch_obj (tag=3214606, func=0x10017d7a0 <catch_i>, data=0) at vm_eval.c:1523
#43 0x0000000100161b00 in rb_f_catch (argc=<value temporarily unavailable, due to optimizations>, argv=<value temporarily unavailable, due to optimizations>) at vm_eval.c:1499
#44 0x0000000100165487 in vm_call_cfunc inlined at /Users/rahul/.rvm/src/ruby-1.9.2-head/vm_insnhelper.c:401
#45 0x0000000100165487 in vm_call_method (th=0x1003016a0, cfp=0x1004ffea0, num=1, blockptr=0x1004ffec9, flag=8, id=<value temporarily unavailable, due to optimizations>, me=0x10031d590, recv=4303825320) at vm_insnhelper.c:523
#46 0x0000000100168215 in vm_exec_core (th=0x1003016a0, initial=<value temporarily unavailable, due to optimizations>) at insns.def:1006
#47 0x000000010016fe53 in vm_exec (th=0x1003016a0) at vm.c:1145
#48 0x0000000100170158 in rb_iseq_eval_main (iseqval=4303807640) at vm.c:1386
#49 0x000000010003f0d2 in ruby_exec_internal (n=0x10086e498) at eval.c:214
#50 0x0000000100041a5c in ruby_exec_node inlined at /Users/rahul/.rvm/src/ruby-1.9.2-head/eval.c:261
#51 0x0000000100041a5c in ruby_run_node (n=<value temporarily unavailable, due to optimizations>) at eval.c:254
#52 0x0000000100000ecf in main (argc=7, argv=0x7fff5fbfcfe0) at main.c:35

[twei55]

I am facing a similar issue:
http://stackoverflow.com/questions/7865320/hijack-hangs-on-macosx-snow-leopard

I just discovered [hijack][1] for ruby debugging. I installed the gem and gave it a try with thin. I grabbed the id of the thin process and passed it to hijack.

$ bundle exec thin start -d -p 3001

$ ps -axf | grep thin
501 52622 34344   0   0:01.90 ttys002    0:07.07 ruby /Users/myself/.rvm/gems/ruby-1.8.7-p352/bin/thin start -p 3001

$ hijack 52622
=> Hijacking...

Instead of giving me an IRB, it stucks after "Hijacking..."

Any ideas?

(OSX 10.6.7, Rails 2.3.8, Ruby 1.8.7)

[ileitch]

Please try 0.2.1.

[grosser]

same issue here...

gem i hijack
Fetching: hijack-0.2.1.gem (100%)
Successfully installed hijack-0.2.1
1 gem installed
[~/code/zendesk/mail_fetcher (master)] ➔ hijack 35120
=> Hijacking.../Users/mgrosser/.rvm/gems/ruby-1.9.3-p429/gems/hijack-0.2.1/lib/hijack/gdb.rb:8: Use RbConfig instead of obsolete and deprecated Config.
^C
[~/code/zendesk/mail_fetcher (master)] ➔ sudo hijack 35120
Password:
=> Hijacking.../Users/mgrosser/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/gems/1.9.1/gems/hijack-0.2.1/lib/hijack/gdb.rb:8: Use RbConfig instead of obsolete and deprecated Config.

[grosser]

Ubuntu + 1.9.3 just gives errors

=> Hijacking.../usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:8: Use RbConfig instead of obsolete and deprecated Config.
sh: line 1: 15333 Aborted                 (core dumped) gdb -q /usr/local/rvm/rubies/ruby-1.9.3-p448/bin/ruby 14239 2>&1
/usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:113:in `write': Broken pipe (Errno::EPIPE)
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:113:in `puts'
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:113:in `exec'
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:68:in `block in break_on_safe_stack_unwind'
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:61:in `each'
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:61:in `break_on_safe_stack_unwind'
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:56:in `attach_outside_gc'
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/gdb.rb:9:in `initialize'
    from /usr/local/rvm/gems/ruby-1.9.3-p448/gems/hijack-0.2.1/lib/hijack/payload.rb:9:in `new'