From 111a3484359f66090acf8ea3d5a74583c0a75349 Mon Sep 17 00:00:00 2001 From: Reid Spencer Date: Sat, 18 Sep 2004 19:34:09 +0000 Subject: [PATCH] Use the /dev/zero device as the device on which the pages are mapped. Patch contributed by Henrik Bach. Thanks Henrik! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16397 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/System/Interix/Memory.cpp | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/lib/System/Interix/Memory.cpp b/lib/System/Interix/Memory.cpp index 94e58939328..771c99d1d30 100644 --- a/lib/System/Interix/Memory.cpp +++ b/lib/System/Interix/Memory.cpp @@ -15,6 +15,7 @@ // Include the generic unix implementation #include "../Unix/Memory.cpp" #include "llvm/System/Process.h" +#include #include namespace llvm { @@ -30,9 +31,14 @@ MemoryBlock Memory::AllocateRWX(unsigned NumBytes) { static const long pageSize = Process::GetPageSize(); unsigned NumPages = (NumBytes+pageSize-1)/pageSize; + + int fd = open("/dev/zero", O_RDWR); + if (fd == -1) { + throw std::string("Can't open /dev/zero device: ") + strerror(errno); + } void *pa = mmap(0, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC, - MAP_PRIVATE|MAP_ANON|MAP_NOCORE, -1, 0); + MAP_SHARED, fd, 0); if (pa == (void*)-1) { throw std::string("Can't allocate RWX Memory: ") + strerror(errno); }