From: George Koehler <xkernigh@...>
Date: 2012-01-31T06:28:31+09:00
Subject: [ruby-core:42275] [ruby-trunk - Bug #5901] OpenBSD "[FATAL] failed to allocate memory"


Issue #5901 has been updated by George Koehler.

File smaller-heap-3.diff added

I reverted my own changes. Then I tried to apply patch by Narihiro Nakamura, but I got patch conflict with svn r34399. After I solved conflict, I can compile and run Ruby, 'make test' passes all tests, and 'make test-all' has 0 failures and 0 errors. My system is OpenBSD 5.0/amd64.

After I solved conflict, patch looks like this:

Index: configure.in
===================================================================
--- configure.in	(revision 34399)
+++ configure.in	(working copy)
@@ -1292,7 +1292,12 @@
 CFLAGS="$save_CFLAGS"])
 AC_DEFINE_UNQUOTED(GC_MARK_STACKFRAME_WORD, $rb_cv_gc_mark_stackframe_word)
 
+AS_CASE(["$target_os"],
+[openbsd*], [
+    AC_DEFINE_UNQUOTED(HEAP_ALIGN_LOG, 12)
+    ])
 
+
 dnl Checks for library functions.
 AC_TYPE_GETGROUPS
 AC_TYPE_SIGNAL
Index: gc.c
===================================================================
--- gc.c	(revision 34399)
+++ gc.c	(working copy)
@@ -536,8 +536,11 @@
 }
 #endif
 
-/* tiny heap size: 16KB */
+#ifndef HEAP_ALIGN_LOG
+/* default tiny heap size: 16KB */
 #define HEAP_ALIGN_LOG 14
+#endif
+
 #define HEAP_ALIGN (1UL << HEAP_ALIGN_LOG)
 #define HEAP_ALIGN_MASK (~(~0UL << HEAP_ALIGN_LOG))
 #define REQUIRED_SIZE_BY_MALLOC (sizeof(size_t) * 5)


----------------------------------------
Bug #5901: OpenBSD "[FATAL] failed to allocate memory"
https://bugs.ruby-lang.org/issues/5901

Author: George Koehler
Status: Assigned
Priority: Normal
Assignee: Narihiro Nakamura
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2012-01-16 trunk 34316) [x86_64-openbsd5.0]


=begin
Ruby trunk fails to build with OpenBSD. During the build, miniruby fails with message
 [FATAL] failed to allocate memory

OpenBSD has a broken posix_memalign(). Ruby fails in gc.c, because posix_memalign() fails and aligned_malloc() returns NULL. OpenBSD's manual for posix_memalign ((<URL:http://xrl.us/bmow7c>)) says:

 BUGS
      Only alignments up to the page size can be specified.

Ruby wants alignment of 16 kilobytes, but my page size is only 4 kilobytes.

I tried to edit gc.c. My first attempt (bad-fix-never-apply.diff) was good enough to build Ruby, but it did not always work, and some tests failed. So I reverted gc.c and tried again.

My second attempt (smaller-heap-for-openbsd.diff) was much simpler. I changed the values of HEAP_ALIGN*, shrinking the heap size from 16 kilobytes to 4 kilobytes, which is not larger than my page size. More tests pass. The only failures in 'make test' are in bootstraptest/test_thread.rb. Those tests seem to create an infinite loop in Ruby, and I needed to kill -9 those processes. Some tests in 'make test-all' failed the same way, with the infinite loop.
=end



-- 
http://bugs.ruby-lang.org/