Skip to content

Mmap: fix grow! for non file IOs #55849

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Sep 24, 2024
Merged

Mmap: fix grow! for non file IOs #55849

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
64cb0cd
Mmap: fix grow! for non file IOs
IanButterworth Sep 23, 2024
b5568fe
fall back to slower stat filesize if optimized filesize fails (#55641)
IanButterworth Sep 23, 2024
a7c648d
define isfile for ::Anonymous
IanButterworth Sep 24, 2024
58b31b5
Apply suggestions from code review
IanButterworth Sep 24, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions base/iostream.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -230,8 +230,8 @@ end
function filesize(s::IOStream)
sz = @_lock_ios s ccall(:ios_filesize, Int64, (Ptr{Cvoid},), s.ios)
if sz == -1
err = Libc.errno()
throw(IOError(string("filesize: ", Libc.strerror(err), " for ", s.name), err))
# if `s` is not seekable `ios_filesize` can fail, so fall back to slower stat method
sz = filesize(stat(s))
end
return sz
end
Expand Down
4 changes: 3 additions & 1 deletion stdlib/Mmap/src/Mmap.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,8 @@ grow!(::Anonymous,o::Integer,l::Integer) = return
function grow!(io::IO, offset::Integer, len::Integer)
pos = position(io)
filelen = filesize(io)
# If non-regular file skip trying to grow since we know that will fail the ftruncate syscall
filelen == 0 && !isfile(io) && return
if filelen < offset + len
failure = ccall(:jl_ftruncate, Cint, (Cint, Int64), fd(io), offset+len)
Base.systemerror(:ftruncate, failure != 0)
Expand Down Expand Up @@ -218,7 +220,7 @@ function mmap(io::IO,
# platform-specific mmapping
@static if Sys.isunix()
prot, flags, iswrite = settings(file_desc, shared)
if requestedSizeLarger
if requestedSizeLarger && isfile(io) # add a condition to this line to ensure it only checks files
if iswrite
if grow
grow!(io, offset, len)
Expand Down