[Win32] Catch exceptions (eg. segfault) on waiting for invoked clang from the driver.

clang/lib/Driver/Driver.cpp: Don't pass through negative exit status, or parent would be confused.

llvm::sys::Program::Wait(): Suppose 0x8000XXXX and 0xC000XXXX as abnormal exit code and pass it as negative value.

Win32 Exception Handler: Exit with ExceptionCode on an unhandle exception.

llvm-svn: 145389

1 files changed, 7 insertions, 1 deletions

diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 086e3a411f3..ec344e0c788 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -511,8 +511,14 @@ int Driver::ExecuteCompilation(const Compilation &C,
     C.CleanupFileList(C.getResultFiles(), true);
 
     // Failure result files are valid unless we crashed.
-    if (Res < 0)
+    if (Res < 0) {
       C.CleanupFileList(C.getFailureResultFiles(), true);
+#ifdef _WIN32
+      // Exit status should not be negative on Win32,
+      // unless abnormal termination.
+      Res = 1;
+#endif
+    }
   }
 
   // Print extra information about abnormal failures, if possible.