* vm_core.h (typedef struct rb_vm_struct): create a new

  'inhibit_thread_createion' field.
* thread.c (rb_thread_terminate_all): set inhibit_thread_creation.
* thread.c (thread_s_new): don't permit to create new thread
  if the VM is under destruction. Otherwise evil finalizer code
  can make SEGV. [Bug #4992][ruby-core:37858]

* bootstraptest/test_objectspace.rb: new test for this fix.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32492 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/vm_core.h b/vm_core.h
index cc450c5790..da912b5b60 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -285,6 +285,7 @@ typedef struct rb_vm_struct {
     VALUE thgroup_default;
 
     int running;
+    int inhibit_thread_creation;
     int thread_abort_on_exception;
     unsigned long trace_flag;
     volatile int sleeper;