Index: lib/Driver/SanitizerArgs.cpp
===================================================================
--- lib/Driver/SanitizerArgs.cpp
+++ lib/Driver/SanitizerArgs.cpp
@@ -115,6 +115,10 @@
     llvm::sys::path::append(Path, "share", BL.File);
     if (llvm::sys::fs::exists(Path))
       BlacklistFiles.push_back(Path.str());
+    else if (BL.Mask == CFI)
+      // If cfi_blacklist.txt cannot be found in the resource dir, driver
+      // should fail.
+      D.Diag(clang::diag::err_drv_no_such_file) << Path;
   }
 }
 
Index: test/Driver/Inputs/resource_dir_with_cfi_blacklist/share/cfi_blacklist.txt
===================================================================
--- test/Driver/Inputs/resource_dir_with_cfi_blacklist/share/cfi_blacklist.txt
+++ test/Driver/Inputs/resource_dir_with_cfi_blacklist/share/cfi_blacklist.txt
@@ -0,0 +1,19 @@
+[cfi-unrelated-cast]
+# The specification of std::get_temporary_buffer mandates a cast to
+# uninitialized T* (libstdc++, libc++, MSVC stdlib).
+fun:_ZSt20get_temporary_buffer*
+fun:_ZNSt3__120get_temporary_buffer*
+fun:*get_temporary_buffer@.*@std@@*
+
+# STL address-of magic (libstdc++, libc++).
+fun:*__addressof*
+fun:_ZNSt3__19addressof*
+
+# Windows C++ stdlib headers that contain bad unrelated casts.
+src:*xmemory0
+src:*xstddef
+
+# std::_Sp_counted_ptr_inplace::_Sp_counted_ptr_inplace() (libstdc++).
+# This ctor is used by std::make_shared and needs to cast to uninitialized T*
+# in order to call std::allocator_traits<T>::construct.
+fun:_ZNSt23_Sp_counted_ptr_inplace*
Index: test/Driver/fsanitize-blacklist.c
===================================================================
--- test/Driver/fsanitize-blacklist.c
+++ test/Driver/fsanitize-blacklist.c
@@ -62,4 +62,8 @@
 // CHECK-ONLY-FIRST-DISABLED: -fsanitize-blacklist={{.*}}.second
 // CHECK-ONLY_FIRST-DISABLED-NOT: good
 
+// If cfi_blacklist.txt cannot be found in the resource dir, driver should fail.
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=cfi -resource-dir=/dev/null %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-MISSING-CFI-BLACKLIST
+// CHECK-MISSING-CFI-BLACKLIST: error: no such file or directory: '{{.*}}/share/cfi_blacklist.txt'
+
 // DELIMITERS: {{^ *"}}
Index: test/Frontend/dependency-gen.c
===================================================================
--- test/Frontend/dependency-gen.c
+++ test/Frontend/dependency-gen.c
@@ -21,7 +21,7 @@
 // RUN: %clang -MD -MF - %s -fsyntax-only -I ./ | FileCheck -check-prefix=CHECK-SIX %s
 // CHECK-SIX: {{ }}x.h
 // RUN: echo "fun:foo" > %t.blacklist
-// RUN: %clang -MD -MF - %s -fsyntax-only -fsanitize=cfi-vcall -flto -fvisibility=hidden -fsanitize-blacklist=%t.blacklist -I ./ | FileCheck -check-prefix=CHECK-SEVEN %s
+// RUN: %clang -MD -MF - %s -fsyntax-only -resource-dir=%S/../Driver/Inputs/resource_dir_with_cfi_blacklist -fsanitize=cfi-vcall -flto -fvisibility=hidden -fsanitize-blacklist=%t.blacklist -I ./ | FileCheck -check-prefix=CHECK-SEVEN %s
 // CHECK-SEVEN: .blacklist
 // CHECK-SEVEN: {{ }}x.h
 #ifndef INCLUDE_FLAG_TEST