[asan] refactoring: don't #include <sys/mman.h> in non-os-specific files

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@147328 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 22 insertions, 1 deletions

diff --git a/lib/asan/asan_linux.cc b/lib/asan/asan_linux.cc
index 45f94e9e0..26a08ae8f 100644
--- a/lib/asan/asan_linux.cc
+++ b/lib/asan/asan_linux.cc
@@ -30,7 +30,7 @@ void *AsanDoesNotSupportStaticLinkage() {
   return &_DYNAMIC;
 }
 
-void *asan_mmap(void *addr, size_t length, int prot, int flags,
+static void *asan_mmap(void *addr, size_t length, int prot, int flags,
                 int fd, uint64_t offset) {
 # if __WORDSIZE == 64
   return (void *)syscall(__NR_mmap, addr, length, prot, flags, fd, offset);
@@ -50,6 +50,27 @@ void *AsanMmapSomewhereOrDie(size_t size, const char *mem_type) {
   return res;
 }
 
+void *AsanMmapFixedNoReserve(uintptr_t fixed_addr, size_t size) {
+  return asan_mmap((void*)fixed_addr, size,
+                   PROT_READ | PROT_WRITE,
+                   MAP_PRIVATE | MAP_ANON | MAP_FIXED | MAP_NORESERVE,
+                   0, 0);
+}
+
+void *AsanMmapFixedReserve(uintptr_t fixed_addr, size_t size) {
+  return asan_mmap((void*)fixed_addr, size,
+                   PROT_READ | PROT_WRITE,
+                   MAP_PRIVATE | MAP_ANON | MAP_FIXED,
+                   0, 0);
+}
+
+void *AsanMprotect(uintptr_t fixed_addr, size_t size) {
+  return asan_mmap((void*)fixed_addr, size,
+                   PROT_NONE,
+                   MAP_PRIVATE | MAP_ANON | MAP_FIXED | MAP_NORESERVE,
+                   0, 0);
+}
+
 void AsanUnmapOrDie(void *addr, size_t size) {
   if (!addr || !size) return;
   int res = syscall(__NR_munmap, addr, size);