Fix truncation of newly created map files.

File truncation could skip due to the fact that st_size field is only initialized for already existing files.

diff --git a/mono/metadata/file-mmap-posix.c b/mono/metadata/file-mmap-posix.c
index c7836c7e66e3de4dddeeb994739e74f0e983b852..be9f740b8572df63433e40064e5a804896784f28 100644 (file)
--- a/mono/metadata/file-mmap-posix.c
+++ b/mono/metadata/file-mmap-posix.c
@@ -280,7 +280,7 @@ open_file_map (MonoString *path, int input_fd, int mode, gint64 *capacity, int a
                goto done;
        }
 
-       if (*capacity > buf.st_size) {
+       if (result != 0 || *capacity > buf.st_size) {
                int unused G_GNUC_UNUSED = ftruncate (fd, (off_t)*capacity);
        }