nagachika	2018-03-10 11:46:51 +0900 (Sat, 10 Mar 2018)

  New Revision: 62712

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62712

  Log:
    merge revision(s) 60384: [Backport #13887]
    
    thread_pthread: do not corrupt stack
    
    This fixes stuck test/ruby/test_io.rb with FIBER_USE_NATIVE=0 on
    GNU/Linux because linked-list pointers used by glibc get
    corrupted when fiber stacks are copied.
    
    Thanks to wanabe for finding the bug and original patch.
    
    * thread_pthread (native_thread_init_stack): fix stack corruption
      [ruby-core:82737] [Bug #13387]

  Modified directories:
    branches/ruby_2_4/
  Modified files:
    branches/ruby_2_4/thread_pthread.c
    branches/ruby_2_4/version.h
Index: ruby_2_4/thread_pthread.c
===================================================================
--- ruby_2_4/thread_pthread.c	(revision 62711)
+++ ruby_2_4/thread_pthread.c	(revision 62712)
@@ -841,8 +841,9 @@ native_thread_init_stack(rb_thread_t *th https://github.com/ruby/ruby/blob/trunk/ruby_2_4/thread_pthread.c#L841
 	size_t size;
 
 	if (get_stack(&start, &size) == 0) {
-	    th->machine.stack_start = start;
-	    th->machine.stack_maxsize = size;
+	    uintptr_t diff = (uintptr_t)start - (uintptr_t)&curr;
+	    th->machine.stack_start = (VALUE *)&curr;
+	    th->machine.stack_maxsize = size - diff;
 	}
 #elif defined get_stack_of
 	if (!th->machine.stack_maxsize) {
Index: ruby_2_4/version.h
===================================================================
--- ruby_2_4/version.h	(revision 62711)
+++ ruby_2_4/version.h	(revision 62712)
@@ -1,6 +1,6 @@ https://github.com/ruby/ruby/blob/trunk/ruby_2_4/version.h#L1
 #define RUBY_VERSION "2.4.4"
 #define RUBY_RELEASE_DATE "2018-03-10"
-#define RUBY_PATCHLEVEL 257
+#define RUBY_PATCHLEVEL 258
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 3
Index: ruby_2_4
===================================================================
--- ruby_2_4	(revision 62711)
+++ ruby_2_4	(revision 62712)

Property changes on: ruby_2_4
___________________________________________________________________
Modified: svn:mergeinfo
## -0,0 +0,1 ##
   Merged /trunk:r60384

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