[asan] add a test for instrumenting globals

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146718 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Instrumentation/AddressSanitizer/instrument_global.ll b/test/Instrumentation/AddressSanitizer/instrument_global.ll
new file mode 100644 (file)
index 0000000..ba8d65a
--- /dev/null
+++ b/test/Instrumentation/AddressSanitizer/instrument_global.ll
@@ -0,0 +1,20 @@
+; RUN: opt < %s -asan -S | FileCheck %s
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+target triple = "x86_64-unknown-linux-gnu"
+@xxx = global i32 0, align 4
+
+; If a global is present, __asan_[un]register_globals should be called from
+; module ctor/dtor
+
+; CHECK: llvm.global_dtors
+; CHECK: llvm.global_ctors
+
+; CHECK: define internal void @asan.module_ctor
+; CHECK-NOT: ret
+; CHECK: call void @__asan_register_globals
+; CHECK: ret
+
+; CHECK: define internal void @asan.module_dtor
+; CHECK-NOT: ret
+; CHECK: call void @__asan_unregister_globals
+; CHECK: ret