naruse	2015-02-13 03:13:26 +0900 (Fri, 13 Feb 2015)

  New Revision: 49578

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=49578

  Log:
    merge revision(s) 49452: [Backport #10813]
    
    * thread_pthread.c (reserve_stack): fix intermittent SIGBUS on
      Linux, by reserving the stack virtual address space at process
      start up so that it will not clash with the heap space.
      [Fix GH-822]

  Modified directories:
    branches/ruby_2_2/
  Modified files:
    branches/ruby_2_2/ChangeLog
    branches/ruby_2_2/thread_pthread.c
    branches/ruby_2_2/version.h
Index: ruby_2_2/ChangeLog
===================================================================
--- ruby_2_2/ChangeLog	(revision 49577)
+++ ruby_2_2/ChangeLog	(revision 49578)
@@ -1,3 +1,10 @@ https://github.com/ruby/ruby/blob/trunk/ruby_2_2/ChangeLog#L1
+Fri Feb 13 03:13:05 2015  Scott Francis  <scott.francis@s...>
+
+	* thread_pthread.c (reserve_stack): fix intermittent SIGBUS on
+	  Linux, by reserving the stack virtual address space at process
+	  start up so that it will not clash with the heap space.
+	  [Fix GH-822]
+
 Fri Feb  6 12:05:13 2015  SHIBATA Hiroshi  <shibata.hiroshi@g...>
 
 	* thread.c: Improve documentation for Thread#value
Index: ruby_2_2/thread_pthread.c
===================================================================
--- ruby_2_2/thread_pthread.c	(revision 49577)
+++ ruby_2_2/thread_pthread.c	(revision 49578)
@@ -653,6 +653,42 @@ space_size(size_t stack_size) https://github.com/ruby/ruby/blob/trunk/ruby_2_2/thread_pthread.c#L653
     }
 }
 
+#ifdef __linux__
+static __attribute__((noinline)) void
+reserve_stack(volatile char *limit, size_t size)
+{
+# ifdef C_ALLOCA
+#   error needs alloca()
+# endif
+    struct rlimit rl;
+    volatile char buf[0x100];
+    STACK_GROW_DIR_DETECTION;
+
+    if (!getrlimit(RLIMIT_STACK, &rl) && rl.rlim_cur == RLIM_INFINITY)
+	return;
+
+    size -= sizeof(buf); /* margin */
+    if (IS_STACK_DIR_UPPER()) {
+	const volatile char *end = buf + sizeof(buf);
+	limit += size;
+	if (limit > end) {
+	    size = limit - end;
+	    limit = alloca(size);
+	    limit[size-1] = 0;
+	}
+    }
+    else {
+	limit -= size;
+	if (buf > limit) {
+	    limit = alloca(buf - limit);
+	    limit[0] = 0;
+	}
+    }
+}
+#else
+# define reserve_stack(limit, size) ((void)(limit), (void)(size))
+#endif
+
 #undef ruby_init_stack
 /* Set stack bottom of Ruby implementation.
  *
@@ -674,6 +710,7 @@ ruby_init_stack(volatile VALUE *addr https://github.com/ruby/ruby/blob/trunk/ruby_2_2/thread_pthread.c#L710
 	if (get_main_stack(&stackaddr, &size) == 0) {
 	    native_main_thread.stack_maxsize = size;
 	    native_main_thread.stack_start = stackaddr;
+	    reserve_stack(stackaddr, size);
 	    return;
 	}
     }
Index: ruby_2_2/version.h
===================================================================
--- ruby_2_2/version.h	(revision 49577)
+++ ruby_2_2/version.h	(revision 49578)
@@ -1,10 +1,10 @@ https://github.com/ruby/ruby/blob/trunk/ruby_2_2/version.h#L1
 #define RUBY_VERSION "2.2.0"
-#define RUBY_RELEASE_DATE "2015-02-06"
-#define RUBY_PATCHLEVEL 43
+#define RUBY_RELEASE_DATE "2015-02-13"
+#define RUBY_PATCHLEVEL 44
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 2
-#define RUBY_RELEASE_DAY 6
+#define RUBY_RELEASE_DAY 13
 
 #include "ruby/version.h"
 

Property changes on: ruby_2_2
___________________________________________________________________
Modified: svn:mergeinfo
   Merged /trunk:r49452


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