6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-13 04:30:23 +00:00
Code Issues Projects Releases Wiki Activity

Fix a race condition in llvm::sys::path::unique_file: when we end up

Browse Source 
failing to create the unique file because the path doesn't exist,
don't fail if someone else manages to create the path before we do.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172032 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Douglas Gregor 2013-01-10 01:58:46 +00:00
parent b11f050434
commit 06c7008e30
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/Support/Unix/PathV2.inc
View File

@ -421,11 +421,12 @@ retry_random_path:
rety_open_create:
int RandomFD = ::open(RandomPath.c_str(), O_RDWR | O_CREAT | O_EXCL, mode);
if (RandomFD == -1) {
int SavedErrno = errno;
// If the file existed, try again, otherwise, error.
if (errno == errc::file_exists)
if (SavedErrno == errc::file_exists)
goto retry_random_path;
// If path prefix doesn't exist, try to create it.
if (errno == errc::no_such_file_or_directory &&
if (SavedErrno == errc::no_such_file_or_directory &&
!exists(path::parent_path(RandomPath))) {
StringRef p(RandomPath);
SmallString<64> dir_to_create;
@ -440,13 +441,15 @@ rety_open_create:
(*i)[1] == '/' &&
(*i)[2] != '/')
return make_error_code(errc::no_such_file_or_directory);
if (::mkdir(dir_to_create.c_str(), 0700) == -1)
if (::mkdir(dir_to_create.c_str(), 0700) == -1 &&
errno != errc::file_exists)
return error_code(errno, system_category());
}
}
goto rety_open_create;
}
return error_code(errno, system_category());
return error_code(SavedErrno, system_category());
}
// Make the path absolute.