Add a basic test for AddressSanitizer. This is just a bare-bones

functionality test.

In general, unless the functionality is substantially separated, we
should lump more basic testing into this file. The test running
infrastructure likes having a few test files with more comprehensive
testing within them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160253 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 70 insertions, 0 deletions

diff --git a/test/Instrumentation/AddressSanitizer/basic.ll b/test/Instrumentation/AddressSanitizer/basic.ll
new file mode 100644
index 0000000000..e80cfeef12
--- /dev/null
+++ b/test/Instrumentation/AddressSanitizer/basic.ll
@@ -0,0 +1,70 @@
+; Test basic address sanitizer instrumentation.
+;
+; 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"
+
+define i32 @test_load(i32* %a) address_safety {
+; CHECK: @test_load
+; CHECK-NOT: load
+; CHECK:   %[[LOAD_ADDR:[^ ]*]] = ptrtoint i32* %a to i64
+; CHECK:   lshr i64 %[[LOAD_ADDR]], 3
+; CHECK:   or i64
+; CHECK:   %[[LOAD_SHADOW_PTR:[^ ]*]] = inttoptr
+; CHECK:   %[[LOAD_SHADOW:[^ ]*]] = load i8* %[[LOAD_SHADOW_PTR]]
+; CHECK:   icmp ne i8
+; CHECK:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
+;
+; The actual load comes next because ASan adds the last instrumentation block
+; to the end of the function.
+; CHECK:   %tmp1 = load i32* %a
+; CHECK:   ret i32 %tmp1
+;
+; First instrumentation block refines the shadow test.
+; CHECK:   and i64 %[[LOAD_ADDR]], 7
+; CHECK:   add i64 %{{.*}}, 3
+; CHECK:   trunc i64 %{{.*}} to i8
+; CHECK:   icmp sge i8 %{{.*}}, %[[LOAD_SHADOW]]
+; CHECK:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
+;
+; Final instrumentation block reports the error.
+; CHECK:   call void @__asan_report_load4(i64 %[[LOAD_ADDR]]) noreturn
+; CHECK:   unreachable
+
+entry:
+  %tmp1 = load i32* %a
+  ret i32 %tmp1
+}
+
+define void @test_store(i32* %a) address_safety {
+; CHECK: @test_store
+; CHECK-NOT: store
+; CHECK:   %[[STORE_ADDR:[^ ]*]] = ptrtoint i32* %a to i64
+; CHECK:   lshr i64 %[[STORE_ADDR]], 3
+; CHECK:   or i64
+; CHECK:   %[[STORE_SHADOW_PTR:[^ ]*]] = inttoptr
+; CHECK:   %[[STORE_SHADOW:[^ ]*]] = load i8* %[[STORE_SHADOW_PTR]]
+; CHECK:   icmp ne i8
+; CHECK:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
+;
+; The actual store comes next because ASan adds the last instrumentation block
+; to the end of the function.
+; CHECK:   store i32 42, i32* %a
+; CHECK:   ret void
+;
+; First instrumentation block refines the shadow test.
+; CHECK:   and i64 %[[STORE_ADDR]], 7
+; CHECK:   add i64 %{{.*}}, 3
+; CHECK:   trunc i64 %{{.*}} to i8
+; CHECK:   icmp sge i8 %{{.*}}, %[[STORE_SHADOW]]
+; CHECK:   br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
+;
+; Final instrumentation block reports the error.
+; CHECK:   call void @__asan_report_store4(i64 %[[STORE_ADDR]]) noreturn
+; CHECK:   unreachable
+
+entry:
+  store i32 42, i32* %a
+  ret void
+}