Issue #953 has been updated by ktsj (Kazuki Tsujimoto).


=begin
ulimit -s 4096 / Ubuntu 12.04 x64 ???trunk(r38279)??追試?????????????????
???????????????????SystemStackError?????????????
MALLOC_CHECK_??????????????????????????

 $ ./ruby nest.rb
 nest.rb:5: stack level too deep (SystemStackError)
 *** glibc detected *** ./ruby: munmap_chunk(): invalid pointer: 0x0000555555a55f40 ***
 ======= Backtrace: =========
 /lib/x86_64-linux-gnu/libc.so.6(+0x7e626)[0x7ffff6f3f626]
 ./ruby(+0x1af3e0)[0x5555557033e0]
 ./ruby(ruby_vm_destruct+0x75)[0x555555702c56]
 ./ruby(ruby_cleanup+0x382)[0x5555555b29c2]
 ./ruby(ruby_run_node+0x45)[0x5555555b2b7b]
 ./ruby(+0x20f09)[0x555555574f09]
 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7ffff6ee276d]
 ./ruby(+0x20dd9)[0x555555574dd9]

???????????????????????以???????????????

 Program received signal SIGABRT, Aborted.
 0x00007ffff6ef7445 in raise () from /lib/x86_64-linux-gnu/libc.so.6
 (gdb) bt
 #0  0x00007ffff6ef7445 in raise () from /lib/x86_64-linux-gnu/libc.so.6
 #1  0x00007ffff6efabab in abort () from /lib/x86_64-linux-gnu/libc.so.6
 #2  0x00007ffff6f34e2e in ?? () from /lib/x86_64-linux-gnu/libc.so.6
 #3  0x00007ffff6f3f626 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
 #4  0x000055555570344d in thread_free (ptr=0x5555559ee570) at vm.c:1762
 #5  0x0000555555702cc3 in ruby_vm_destruct (vm=0x5555559edf20) at vm.c:1570
 #6  0x00005555555b29c2 in ruby_cleanup (ex=1) at eval.c:233
 #7  0x00005555555b2b7b in ruby_run_node (n=0x555555dbd030) at eval.c:307
 #8  0x0000555555574f09 in main (argc=5, argv=0x7fffffffe018) at main.c:36
 (gdb) fr 4
 #4  0x000055555570344d in thread_free (ptr=0x5555559ee570) at vm.c:1762
 1762                    free(th->altstack);
 (gdb) p th->altstack
 $3 = (void *) 0x555555a55f40

?????????[Bug #7141]????件??????????????????????????対???????????????????????????????????

* ???altstack????????mprotect?????確??????????????????????????????SEGV????????????????????
* ???ALT_STACK_SIZE???5???????????????????????????????????????????????SystemStackError???????????????????????(MALLOC_CHECK_?????????????????)
=end

----------------------------------------
Bug #953: 深???????????????????????????????
https://bugs.ruby-lang.org/issues/953#change-34583

Author: tadf (tadayoshi funaba)
Status: Assigned
Priority: Normal
Assignee: ko1 (Koichi Sasada)
Category: 
Target version: 2.0.0
ruby -v: ruby 1.9.1 (2008-12-30 patchlevel-5000 trunk 21202) [i686-linux]


=begin
 以?????????????????????????? Segmentation fault ?????????????
 
 $ cat ./nest.rb 
 a = [0]
 10000.times do
   a = [a]
 end
 p a
 
 $ ./ruby -v ./nest.rb 
 ruby 1.9.1 (2008-12-30 patchlevel-5000 trunk 21202) [i686-linux]
 Segmentation fault
 
 (gdb) bt
 #0  0x08111407 in vm_get_ruby_level_next_cfp (th=0x81ae758, cfp=0xb7c734a8)
     at vm.c:131
 #1  0x0811159b in rb_sourceline () at vm.c:757
 #2  0x0814ead7 in rb_bug (fmt=0x81737d3 "Segmentation fault") at error.c:230
 #3  0x080d49e6 in sigsegv (sig=11, info=0x82152fc, ctx=0x821537c)
     at signal.c:600
 #4  <signal handler called>
 #5  frame_func_id (cfp=0xb7c734a8) at eval.c:730
 #6  0x0812696a in rb_exec_recursive (func=0x812d040 <inspect_ary>, 
     obj=135994660, arg=0) at thread.c:3237
 #7  0x0812d01a in rb_ary_inspect (ary=4) at array.c:1574
 #8  0x0811d854 in vm_call0 (th=0x81ae758, klass=136124880, recv=135994660, 
     id=760, oid=760, argc=0, argv=0x0, body=0x81d1818, nosuper=0)
     at vm_eval.c:70
 #9  0x0811ddb2 in rb_funcall (recv=<value optimized out>, mid=760, n=0)
     at vm_eval.c:248
 #10 0x080840aa in rb_inspect (obj=135994660) at object.c:312
 #11 0x0812d0f3 in inspect_ary (ary=135994500, dummy=0, recur=0) at array.c:1550
 #12 0x08126b5f in rb_exec_recursive (func=0x812d040 <inspect_ary>, 
     obj=135994500, arg=0) at thread.c:3273
 #13 0x0812d01a in rb_ary_inspect (ary=4) at array.c:1574
 #14 0x0811d854 in vm_call0 (th=0x81ae758, klass=136124880, recv=135994500, 
     id=760, oid=760, argc=0, argv=0x0, body=0x81d1818, nosuper=0)
 ---Type <return> to continue, or q <return> to quit---
=end



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