From 787f74b48730d896dba2d15c06a8c792d9d1af15 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Tue, 1 Nov 2011 05:20:40 +0000
Subject: [PATCH] runtime: Don't ask mmap for wrapping memory.
From-SVN: r180732
---
libgo/runtime/malloc.goc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libgo/runtime/malloc.goc b/libgo/runtime/malloc.goc
index f8d4327d6906..66f5bda66c0b 100644
--- a/libgo/runtime/malloc.goc
+++ b/libgo/runtime/malloc.goc
@@ -358,6 +358,8 @@ runtime_mallocinit(void)
// away from the running binary image and then round up
// to a MB boundary.
want = (byte*)(((uintptr)end + (1<<18) + (1<<20) - 1)&~((1<<20)-1));
+ if(0xffffffff - (uintptr)want <= bitmap_size + arena_size)
+ want = 0;
p = runtime_SysReserve(want, bitmap_size + arena_size);
if(p == nil)
runtime_throw("runtime: cannot reserve arena virtual address space");
--
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