[Modules] Use vfs for (recursive) directory iteration

Clang performs directory walk while searching headers inside modules by
using the ::sys::fs instead of ::vfs. This prevents any code that uses
the VFS (e.g, reproducer scripts) to actually find such headers, since
the VFS will never be searched for those.

Change these places to use vfs::recursive_directory_iterator and
vfs::directory_iterator instead.

Differential Revision: http://reviews.llvm.org/D20266

rdar://problem/25880368

llvm-svn: 269661

1 files changed, 13 insertions, 0 deletions

diff --git a/clang/test/Modules/crash-vfs-umbrella-frameworks.m b/clang/test/Modules/crash-vfs-umbrella-frameworks.m
index 0454976b170..0c3981ddaa8 100644
--- a/clang/test/Modules/crash-vfs-umbrella-frameworks.m
+++ b/clang/test/Modules/crash-vfs-umbrella-frameworks.m
@@ -40,3 +40,16 @@
 // CHECKYAML-NEXT:          'external-contents': "/[[PATH]]/i/Frameworks/B.framework/Headers/B.h"
 
 @import I;
+
+// Run the reproducer script - regular exit code is enough to test it works. The
+// intent here is to guarantee that the collect umbrella headers into the VFS
+// can be used, testing that vfs::recursive_directory_iterator is used correctly
+// Make sure to erase the include paths used to build the modules to guarantee
+// that the VFS overlay won't fallback to use it. Also wipe out the module cache
+// to force header search.
+//
+// RUN: cd %t
+// RUN: rm -rf i
+// RUN: rm -rf crash-vfs-umbrella-*.cache/modules/*
+// RUN: chmod 755 crash-vfs-*.sh
+// RUN: ./crash-vfs-*.sh