#1352: Segfault occurs when invoked the Module#{class_variable_set, class_variable_get} within some threads. ----------------------------------+----------------------------------------- Reporter: watson1978@… | Owner: lsansonetti@… Type: defect | Status: new Priority: blocker | Milestone: Component: MacRuby | Keywords: ----------------------------------+----------------------------------------- Test Script: {{{ #!ruby m = Module.new th = Thread.new { 1000.times do |i| m.class_variable_set(:"@@foo_#{i}", i) end } 1000.times do |i| begin m.class_variable_get(:"@@foo_#{i}") rescue end end th.join }}} BackTrace: {{{ Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000 0x00007fff83cc3c00 in strlen () (gdb) t a a bt Thread 3 (process 25594): #0 0x00000001000ad36e in rb_str_intern_fast (str=0) at string.c:6298 #1 0x0000000100134ccb in __rb_vm_bcall [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:100 #2 0x0000000100134ccb in vm_block_eval [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:1221 #3 0x0000000100134ccb in rb_vm_yield_args () at dispatcher.cpp:1278 #4 0x00000001000db2fd in rb_vm_yield (argc=1, argv=0x10177f928) at vm.h:697 #5 0x00000001000db2d0 in rb_yield (val=489) at vm_eval.c:183 #6 0x000000010004d1da in int_dotimes (num=4001, sel=0x100fe7350) at numeric.c:3241 #7 0x000000010012e8b4 in __rb_vm_rcall [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:159 #8 0x000000010012e8b4 in ruby_dispatch [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:466 #9 0x000000010012e8b4 in rb_vm_dispatch () at dispatcher.cpp:872 #10 0x0000000101500744 in ?? () #11 0x0000000101500c81 in ?? () #12 0x0000000100132c67 in __rb_vm_bcall [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:98 #13 0x0000000100132c67 in vm_block_eval [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:1221 #14 0x0000000100132c67 in rb_vm_block_eval (b=0x200020960, argc=0, argv=0x0) at dispatcher.cpp:1228 #15 0x000000010014d093 in rb_vm_thread_run (thread=8590067680) at vm.cpp:4856 #16 0x00007fff83cf9fd6 in _pthread_start () #17 0x00007fff83cf9e89 in thread_start () Current language: auto; currently c Thread 2 (process 25594): #0 0x00007fff833ee528 in Auto::visitAllocatedBlocks<Auto::scan_retained_and_old_blocks_visitor> () #1 0x00007fff833ed944 in Auto::MemoryScanner::scan_retained_and_old_blocks () #2 0x00007fff833e8a47 in Auto::Collector::check_roots () #3 0x00007fff833ed8b1 in Auto::MemoryScanner::scan () #4 0x00007fff833e277d in Auto::Zone::collect () #5 0x00007fff833cba7e in auto_collect_internal () #6 0x00007fff833cc0bd in auto_collection_work () #7 0x00007fff83cfcd64 in _dispatch_call_block_and_release () #8 0x00007fff83cdb8d2 in _dispatch_queue_drain () #9 0x00007fff83cdb734 in _dispatch_queue_invoke () #10 0x00007fff83cdb2de in _dispatch_worker_thread2 () #11 0x00007fff83cdac08 in _pthread_wqthread () #12 0x00007fff83cdaaa5 in start_wqthread () Thread 1 (process 25594): #0 0x00007fff83cc3c00 in strlen () #1 0x000000010012d622 in rb_vm_dispatch () at dispatcher.cpp:698 #2 0x00000001000d9dc9 in rb_vm_call0 (vm=0x100f231c0, top=0, self=8590682912, klass=0x200037b60, sel=0x0, block=0x0, opt=2 '\002', argc=0, argv=0x0) at vm.h:654 #3 0x00000001000daeee in rb_vm_call2 (block=0x0, self=8590682912, klass=8590162784, sel=0x0, argc=0, argv=0x0) at vm.h:679 #4 0x00000001000dad8e in rb_call (recv=8590682912, mid=11488, argc=0, argv=0x0, scope=1, pass_current_block=false) at vm_eval.c:32 #5 0x00000001000db111 in rb_funcall (recv=8590682912, mid=11488, n=0) at vm_eval.c:106 #6 0x0000000100025490 in exc_message (exc=8590682912, sel=0x7fff880df27c) at error.c:455 #7 0x000000010012e8b4 in __rb_vm_rcall [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:159 #8 0x000000010012e8b4 in ruby_dispatch [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:466 #9 0x000000010012e8b4 in rb_vm_dispatch () at dispatcher.cpp:872 #10 0x0000000100025926 in rb_vm_call0 (vm=0x100f231c0, top=0, self=8590682912, klass=0x200037b60, sel=0x7fff880df27c, block=0x0, opt=2 '\002', argc=0, argv=0x0) at vm.h:654 #11 0x000000010002585f in rb_vm_call (self=8590682912, sel=0x7fff880df27c, argc=0, argv=0x0) at vm.h:661 #12 0x00000001000277ed in format_message (exc=8590682912) at error.c:1274 #13 0x0000000100139e2a in rb_ensure () at vm.cpp:3695 #14 0x00000001000279a8 in rb_format_exception_message (exc=8590682912) at error.c:1314 #15 0x00000001000c6925 in rb_rb2oc_exception (exc=8590682912) at objc.m:504 #16 0x0000000100148868 in __vm_raise () at vm.cpp:3561 #17 0x00000001001489fa in rb_vm_raise (exception=8590682912) at vm.cpp:3639 #18 0x0000000100028bc3 in rb_exc_raise (mesg=8590682912) at eval.c:290 #19 0x0000000100025c39 in rb_name_error (id=Could not find the frame base for "rb_name_error". ) at error.c:670 #20 0x00000001000c10da in rb_cvar_get3 (klass=0, id=13110, check=true, defined=false) at variable.c:1827 #21 0x00000001000c112e in rb_cvar_get2 (klass=8590068000, id=13110, check=true) at variable.c:1838 #22 0x00000001000c1152 in rb_cvar_get (klass=8590068000, id=13110) at variable.c:1844 #23 0x00000001000532ce in rb_mod_cvar_get (obj=8590068000, sel=0x100fc15d0, iv=8590682944) at object.c:2418 #24 0x000000010012e8e6 in __rb_vm_rcall [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:161 #25 0x000000010012e8e6 in ruby_dispatch [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:466 #26 0x000000010012e8e6 in rb_vm_dispatch () at dispatcher.cpp:872 #27 0x0000000101500744 in ?? () #28 0x0000000101500db2 in ?? () #29 0x0000000100134ccb in __rb_vm_bcall [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:100 #30 0x0000000100134ccb in vm_block_eval [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:1221 #31 0x0000000100134ccb in rb_vm_yield_args () at dispatcher.cpp:1278 #32 0x00000001000db2fd in rb_vm_yield (argc=1, argv=0x7fff5fbfcc78) at vm.h:697 #33 0x00000001000db2d0 in rb_yield (val=117) at vm_eval.c:183 #34 0x000000010004d1da in int_dotimes (num=4001, sel=0x100fe7350) at numeric.c:3241 #35 0x000000010012e8b4 in __rb_vm_rcall [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:159 #36 0x000000010012e8b4 in ruby_dispatch [inlined] () at /Users/watson/src /macruby-master/dispatcher.cpp:466 #37 0x000000010012e8b4 in rb_vm_dispatch () at dispatcher.cpp:872 #38 0x0000000101500744 in ?? () #39 0x0000000101500224 in ?? () #40 0x000000010014a072 in rb_vm_run (fname=0x2000a74c0 "/Users/watson/tmp/t.rb", node=0x2000252a0, binding=0x0, inside_eval=false) at vm.cpp:4115 #41 0x000000010002898b in ruby_run_node (n=0x2000252a0) at eval.c:211 #42 0x0000000100000be3 in main (argc=2, argv=0x100f1c040, envp=0x7fff5fbfde58) at main.cpp:40 (gdb) }}} -- Ticket URL: <http://www.macruby.org/trac/ticket/1352> MacRuby <http://macruby.org/>