cygwin: use CREATE_DEFAULT_ERROR_MODE in spawn

This allows native processes to get Windows-default error handling
behavior (such as invoking the registered JIT debugger).

diff --git a/winsup/cygwin/spawn.cc b/winsup/cygwin/spawn.cc
index 92d190d1a764660e26a8440ae9f1ca4a762f98f6..83b216f527dcdba9d37723622ab3620b7a03721b 100644 (file)
--- a/winsup/cygwin/spawn.cc
+++ b/winsup/cygwin/spawn.cc
@@ -431,6 +431,13 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
 
       c_flags |= CREATE_SEPARATE_WOW_VDM | CREATE_UNICODE_ENVIRONMENT;
 
+      /* Add CREATE_DEFAULT_ERROR_MODE flag for non-Cygwin processes so they
+        get the default error mode instead of inheriting the mode Cygwin
+        uses.  This allows things like Windows Error Reporting/JIT debugging
+        to work with processes launched from a Cygwin shell. */
+      if (!real_path.iscygexec ())
+       c_flags |= CREATE_DEFAULT_ERROR_MODE;
+
       /* We're adding the CREATE_BREAKAWAY_FROM_JOB flag here to workaround
         issues with the "Program Compatibility Assistant (PCA) Service".
         For some reason, when starting long running sessions from mintty(*),