Ruby » Ruby master

• vm_core.h (enum rb_thread_status): remove THREAD_TO_KILL

• vm_core.h (struct rb_thread_struct): add to_kill field

• thread.c (terminate_i): convert THREAD_TO_KILL to to_kill.

• thread.c (rb_threadptr_to_kill): ditto.

• thread.c (rb_thread_kill): ditto.

• thread.c (rb_thread_wakeup_alive): ditto.

• thread.c (thread_list_i): ditto.

• thread.c (static const char): ditto.

• thread.c (thread_status_name): ditto.

• thread.c (rb_thread_status): ditto.

• thread.c (rb_thread_inspect): ditto.

• vm_backtrace.c (thread_backtrace_to_ary): ditto.

• thread.c (rb_threadptr_execute_interrupts): fix thread status
  overwritten issue. [Bug #7450] [ruby-core:50249]

• test/ruby/test_thread.rb (test_hread_status_raise_after_kill):
  test for the above.

• test/ruby/test_thread.rb (test_thread_status_in_trap): test for
  thread status in trap.

• test/ruby/test_thread.rb (test_status_and_stop_p): remove
  Thread.control_interrupt unsafe test. Thread#kill no longer
  changes thread status. Instead of, Thread#kill receiver changes
  their own status when receiving kill signal.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37931 b2dd03c8-39d4-4d8f-98ff-823fe69b080e