check for interrupt from fgets on Windows

Windows does not have the error EINTR when a blocking syscall is
interrupted by a signal. The ReadFile API that fgets is implemented
with instead use ERROR_OPERATION_ABORTED. Check for that after fgets.

llvm-svn: 366520

1 files changed, 3 insertions, 0 deletions

diff --git a/lldb/source/Core/IOHandler.cpp b/lldb/source/Core/IOHandler.cpp
index b30308490cc..e3fb5052990 100644
--- a/lldb/source/Core/IOHandler.cpp
+++ b/lldb/source/Core/IOHandler.cpp
@@ -383,6 +383,9 @@ bool IOHandlerEditline::GetLine(std::string &line, bool &interrupted) {
         // fgets twice until this bug is fixed.
         if (fgets(buffer, sizeof(buffer), in) == nullptr &&
             fgets(buffer, sizeof(buffer), in) == nullptr) {
+          // this is the equivalent of EINTR for Windows
+          if (GetLastError() == ERROR_OPERATION_ABORTED)
+            continue;
 #else
         if (fgets(buffer, sizeof(buffer), in) == nullptr) {
 #endif