[newlib-cygwin] Cygwin: ldd: Also look for not found DLLs when exit status is non-zero

[Jon TURNEY <jturney@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=f4a1b6ae182aaebd5b5a69f3f31ef633bc174464

commit f4a1b6ae182aaebd5b5a69f3f31ef633bc174464
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Mon Sep 7 16:24:39 2020 +0100

    Cygwin: ldd: Also look for not found DLLs when exit status is non-zero
    
    If the process exited with e.g. STATUS_DLL_NOT_FOUND, also process the
    file to look for not found DLLs.
    
    (We currently only do this when a STATUS_DLL_NOT_FOUND exception occurs,
    which I haven't managed to observe)
    
    This still isn't 100% correct, as it only examines the specified file
    for missing DLLs, not recursively on the DLLs it depends upon.

Diff:
---
 winsup/utils/ldd.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/winsup/utils/ldd.cc b/winsup/utils/ldd.cc
index e1af99e12..1e1863c1c 100644
--- a/winsup/utils/ldd.cc
+++ b/winsup/utils/ldd.cc
@@ -407,6 +407,8 @@ report (const char *in_fn, bool multiple)
 	  }
 	  break;
 	case EXIT_PROCESS_DEBUG_EVENT:
+	  if (ev.u.ExitProcess.dwExitCode != 0)
+	    process_fn = fn_win;
 print_and_exit:
 	  print_dlls (&dll_list, isdll ? fn_win : NULL, process_fn);
 	  exitnow = true;