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Work around a page size issue on Cygwin.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72332 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jay Foad
2009-05-23 17:57:59 +00:00
parent 6bb4958543
commit a14be3b264
1 changed files with 6 additions and 1 deletions
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7
lib/System/Unix/Process.inc
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@@ -42,7 +42,12 @@ using namespace sys;
unsigned
Process::GetPageSize()
{
#if defined(HAVE_GETPAGESIZE)
#if defined(__CYGWIN__)
// On Cygwin, getpagesize() returns 64k but the page size for the purposes of
// memory protection and mmap() is 4k.
// See http://www.cygwin.com/ml/cygwin/2009-01/threads.html#00492
static const int page_size = 0x1000;
#elif defined(HAVE_GETPAGESIZE)
static const int page_size = ::getpagesize();
#elif defined(HAVE_SYSCONF)
static long page_size = ::sysconf(_SC_PAGE_SIZE);