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Work around a page size issue on Cygwin. 

llvm-svn: 72332
This commit is contained in:
Jay Foad 2009-05-23 17:57:59 +00:00
parent be6a9a151a
commit c1fca9fb3a
1 changed files with 6 additions and 1 deletions
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7
llvm/lib/System/Unix/Process.inc
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@ -42,7 +42,12 @@ using namespace sys;
unsigned unsigned
Process::GetPageSize() 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(); static const int page_size = ::getpagesize();
#elif defined(HAVE_SYSCONF) #elif defined(HAVE_SYSCONF)
static long page_size = ::sysconf(_SC_PAGE_SIZE); static long page_size = ::sysconf(_SC_PAGE_SIZE);