try keep old behaviror for 🍎

JuliaLang · Jul 18, 2023 · 67bab23 · 67bab23
1 parent 8b02ca4
commit 67bab23
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/stdlib/Mmap/src/Mmap.jl b/stdlib/Mmap/src/Mmap.jl
@@ -210,8 +210,10 @@ function mmap(io::IO,
     file_desc = gethandle(io)
     szfile = convert(Csize_t, len + offset)
     requestedSizeLarger = false
-    if !(io isa Mmap.Anonymous || Sys.isapple())
-        requestedSizeLarger = szfile > filesize(io)
+    if !(io isa Mmap.Anonymous)
+        @static if !Sys.isapple()
+            requestedSizeLarger = szfile > filesize(io)
+        end
     end
     # platform-specific mmapping
     @static if Sys.isunix()
@@ -227,6 +229,9 @@ function mmap(io::IO,
                 throw(ArgumentError("unable to increase file size to $szfile due to read-only permissions"))
             end
         end
+        @static if Sys.isapple()
+            iswrite && grow && grow!(io, offset, len)
+        end
         # mmap the file
         ptr = ccall(:jl_mmap, Ptr{Cvoid}, (Ptr{Cvoid}, Csize_t, Cint, Cint, RawFD, Int64),
             C_NULL, mmaplen, prot, flags, file_desc, offset_page)