SeqPoint are now kept in memory with a compact encoding.

[mono.git] / mono / utils / mono-mmap.c

diff --git a/mono/utils/mono-mmap.c b/mono/utils/mono-mmap.c
index 5546c6b7cca923cb217f5b89ce2e45ae10b11b9c..6caf9628380f2f3ab8cab48c096dd5a913286e17 100644 (file)
--- a/mono/utils/mono-mmap.c
+++ b/mono/utils/mono-mmap.c
@@ -29,6 +29,7 @@
 #endif
 
 #include "mono-mmap.h"
+#include "mono-mmap-internal.h"
 #include "mono-proclib.h"
 
 #ifndef MAP_ANONYMOUS
@@ -243,6 +244,12 @@ mono_shared_area_instances (void **array, int count)
        return 0;
 }
 
+int
+mono_pages_not_faulted (void *addr, size_t length)
+{
+       return -1;
+}
+
 #else
 #if defined(HAVE_MMAP)
 
@@ -308,13 +315,13 @@ mono_valloc (void *addr, size_t length, int flags)
        mflags |= MAP_PRIVATE;
 
        ptr = mmap (addr, length, prot, mflags, -1, 0);
-       if (ptr == (void*)-1) {
+       if (ptr == MAP_FAILED) {
                int fd = open ("/dev/zero", O_RDONLY);
                if (fd != -1) {
                        ptr = mmap (addr, length, prot, mflags, fd, 0);
                        close (fd);
                }
-               if (ptr == (void*)-1)
+               if (ptr == MAP_FAILED)
                        return NULL;
        }
        return ptr;
@@ -368,7 +375,7 @@ mono_file_map (size_t length, int flags, int fd, guint64 offset, void **ret_hand
                mflags |= MAP_32BIT;
 
        ptr = mmap (0, length, prot, mflags, fd, offset);
-       if (ptr == (void*)-1)
+       if (ptr == MAP_FAILED)
                return NULL;
        *ret_handle = (void*)length;
        return ptr;
@@ -443,6 +450,30 @@ mono_mprotect (void *addr, size_t length, int flags)
 }
 #endif // __native_client__
 
+int
+mono_pages_not_faulted (void *addr, size_t size)
+{
+       int i;
+       gint64 count;
+       int pagesize = mono_pagesize ();
+       int npages = (size + pagesize - 1) / pagesize;
+       char *faulted = g_malloc0 (sizeof (char*) * npages);
+
+       if (mincore (addr, size, faulted) != 0) {
+               count = -1;
+       } else {
+               count = 0;
+               for (i = 0; i < npages; ++i) {
+                       if (faulted [i] != 0)
+                               ++count;
+               }
+       }
+
+       g_free (faulted);
+
+       return count;
+}
+
 #else
 
 /* dummy malloc-based implementation */
@@ -481,6 +512,13 @@ mono_mprotect (void *addr, size_t length, int flags)
        }
        return 0;
 }
+
+int
+mono_pages_not_faulted (void *addr, size_t length)
+{
+       return -1;
+}
+
 #endif // HAVE_MMAP
 
 #if defined(HAVE_SHM_OPEN) && !defined (DISABLE_SHARED_PERFCOUNTERS)