* thread_pthread.c (ruby_init_stack): ignore `STACK_END_ADDRESS'

  if Ruby interpreter is running on co-routine.
  [Feature ruby#2294]
  https://bugs.ruby-lang.org/issues/2294#note-18



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38905 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Wed Jan 23 13:35:37 2013  Koichi Sasada  <[email protected]>
+
+	* thread_pthread.c (ruby_init_stack): ignore `STACK_END_ADDRESS'
+	  if Ruby interpreter is running on co-routine.
+	  [Feature #2294]
+	  https://bugs.ruby-lang.org/issues/2294#note-18
+
 Wed Jan 23 12:28:22 2013  Nobuyoshi Nakada  <[email protected]>
 
 	* win32/win32.c (rb_w32_spawn, rb_w32_aspawn_flags): check the results

thread_pthread.c

@@ -643,6 +643,27 @@ ruby_init_stack(volatile VALUE *addr
 	native_main_thread.stack_maxsize = space;
 #endif
     }
+
+    /* If addr is out of range of main-thread stack range estimation,  */
+    /* it should be on co-routine (alternative stack). [Feature #2294] */
+    {
+	void *start, *end;
+
+	if (IS_STACK_DIR_UPPER()) {
+	    start = native_main_thread.stack_start;
+	    end = (char *)native_main_thread.stack_start + native_main_thread.stack_maxsize;
+	}
+	else {
+	    start = (char *)native_main_thread.stack_start - native_main_thread.stack_maxsize;
+	    end = native_main_thread.stack_start;
+	}
+
+	if ((void *)addr < start || (void *)addr > end) {
+	    /* out of range */
+	    native_main_thread.stack_start = (VALUE *)addr;
+	    native_main_thread.stack_maxsize = 0; /* unknown */
+	}
+    }
 }
 
 #define CHECK_ERR(expr) \