[sanitizer] revert r267203 as it breaks aarch64 bots

llvm-svn: 267251

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cc b/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cc
index 20aed19..6c1a852 100644 (file)
--- a/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cc
@@ -272,8 +272,7 @@ void *MmapFixedNoReserve(uptr fixed_addr, uptr size, const char *name) {
 
 void *MmapNoAccess(uptr fixed_addr, uptr size, const char *name) {
   int fd = name ? GetNamedMappingFd(name, size) : -1;
-  unsigned flags = MAP_PRIVATE | MAP_NORESERVE;
-  if (fixed_addr != 0) flags |= MAP_FIXED;
+  unsigned flags = MAP_PRIVATE | MAP_FIXED | MAP_NORESERVE;
   if (fd == -1) flags |= MAP_ANON;
 
   return (void *)internal_mmap((void *)fixed_addr, size, PROT_NONE, flags, fd,