#include "llvm/LTO/Caching.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Errc.h"
-#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
+#include "llvm/Support/Process.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
MBOrErr.getError().message() + "\n");
// This is atomic on POSIX systems.
- if (auto EC = sys::fs::rename(TempFilename, EntryPath))
+ // On Windows, it can fail with permission denied if the destination
+ // file already exists. Since the existing file should be semantically
+ // equivalent to the one we are trying to write, we give AddBuffer
+ // a copy of the bytes we wrote in that case. We do this instead of
+ // just using the existing file, because the pruner might delete the
+ // file before we get a chance to use it.
+ auto EC = sys::fs::rename(TempFilename, EntryPath);
+ if (EC == errc::permission_denied) {
+ auto MBCopy = MemoryBuffer::getMemBufferCopy(
+ (*MBOrErr)->getBuffer(), EntryPath);
+ MBOrErr = std::move(MBCopy);
+ sys::fs::remove(TempFilename);
+ } else if (EC) {
report_fatal_error(Twine("Failed to rename temporary file ") +
TempFilename + " to " + EntryPath + ": " +
EC.message() + "\n");
+ }
AddBuffer(Task, std::move(*MBOrErr), EntryPath);
}