hwasan: Use C++ driver for cfi.cc test.

pcc · pcc · commit 749f556bbd14 · 2019-07-17T23:35:15.000Z
It turns out that this test was only passing by accident. It was relying on the optimizer to remove the only reference to A's vtable by realizing that the CFI check will always fail. The vtable contains a reference to RTTI in libc++, which will be unresolved because the C driver won't link against it. This was found by my prototype implementation of HWASAN for globals, which happens to end up preserving the reference. Differential Revision: https://reviews.llvm.org/D64890 llvm-svn: 366389
diff --git a/compiler-rt/test/hwasan/TestCases/cfi.cc b/compiler-rt/test/hwasan/TestCases/cfi.cc
@@ -1,4 +1,4 @@
-// RUN: %clang_hwasan -fsanitize=cfi -fno-sanitize-trap=cfi -flto -fvisibility=hidden -fuse-ld=lld %s -o %t
+// RUN: %clangxx_hwasan -fsanitize=cfi -fno-sanitize-trap=cfi -flto -fvisibility=hidden -fuse-ld=lld %s -o %t
 // RUN: not %run %t 2>&1 | FileCheck %s
 
 // REQUIRES: android

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-// RUN: %clang_hwasan -fsanitize=cfi -fno-sanitize-trap=cfi -flto -fvisibility=hidden -fuse-ld=lld %s -o %t`
	`1`	`+// RUN: %clangxx_hwasan -fsanitize=cfi -fno-sanitize-trap=cfi -flto -fvisibility=hidden -fuse-ld=lld %s -o %t`
`2`	`2`	`// RUN: not %run %t 2>&1 \| FileCheck %s`
`3`	`3`
`4`	`4`	`// REQUIRES: android`