[libFuzzer] Properly use Handle instead of FD on Windows.

For Windows, sanitizers work with Handles, not with posix file descriptors,
because they use the windows-specific API. So we need to convert the fds to
handles before passing them to the sanitizer library.
After this change, close_fd_mask is fixed for Windows (this fix some tests too).

Differential Revision: https://reviews.llvm.org/D29548

llvm-svn: 294388

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerIOWindows.cpp b/llvm/lib/Fuzzer/FuzzerIOWindows.cpp
index 536e1306725..75d4e3a0607 100644
--- a/llvm/lib/Fuzzer/FuzzerIOWindows.cpp
+++ b/llvm/lib/Fuzzer/FuzzerIOWindows.cpp
@@ -149,6 +149,10 @@ void DiscardOutput(int Fd) {
   fclose(Temp);
 }
 
+intptr_t GetHandleFromFd(int fd) {
+  return _get_osfhandle(fd);
+}
+
 static bool IsSeparator(char C) {
   return C == '\\' || C == '/';
 }