From: Vitaly Buka <vitalybuka@google.com>
Date: Mon, 7 Aug 2017 07:12:33 +0000 (+0000)
Subject: Add -asan-force-dynamic-shadow test
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=483cdb41d2242f5d4cd1b70e868c8a98e0d2c0c6;p=llvm

Add -asan-force-dynamic-shadow test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310240 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Instrumentation/AddressSanitizer/force-dynamic-shadow.ll b/test/Instrumentation/AddressSanitizer/force-dynamic-shadow.ll
new file mode 100644
index 00000000000..d0152d278ad
--- /dev/null
+++ b/test/Instrumentation/AddressSanitizer/force-dynamic-shadow.ll
@@ -0,0 +1,22 @@
+; Test -asan-force-dynamic-shadow flag.
+;
+; RUN: opt -asan -asan-module -S -asan-force-dynamic-shadow=1 < %s | FileCheck %s --check-prefixes=CHECK,CHECK-FDS
+; RUN: opt -asan -asan-module -S -asan-force-dynamic-shadow=0 < %s | FileCheck %s --check-prefixes=CHECK,CHECK-NDS
+
+target triple = "x86_64-unknown-linux-gnu"
+
+define i32 @test_load(i32* %a) sanitize_address {
+; First instrumentation in the function must be to load the dynamic shadow
+; address into a local variable.
+; CHECK-LABEL: @test_load
+; CHECK: entry:
+; CHECK-FDS-NEXT: %[[SHADOW:[^ ]*]] = load i64, i64* @__asan_shadow_memory_dynamic_address
+; CHECK-NDS-NOT: __asan_shadow_memory_dynamic_address
+
+; Shadow address is loaded and added into the whole offset computation.
+; CHECK-FDS add i64 %{{.*}}, %[[SHADOW] ]
+
+entry:
+  %tmp1 = load i32, i32* %a, align 4
+  ret i32 %tmp1
+}