diff options
Diffstat (limited to 'test/Instrumentation')
| -rw-r--r-- | test/Instrumentation/AddressSanitizer/different_scale_and_offset.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/Instrumentation/AddressSanitizer/different_scale_and_offset.ll b/test/Instrumentation/AddressSanitizer/different_scale_and_offset.ll new file mode 100644 index 0000000000..c07069c2dc --- /dev/null +++ b/test/Instrumentation/AddressSanitizer/different_scale_and_offset.ll @@ -0,0 +1,41 @@ +; Test non-default shadow mapping scale and offset. +; +; RUN: opt < %s -asan -asan-mapping-scale=2 -asan-mapping-offset-log=0 -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" + +; Test that ASan tells scale and offset to runtime. +; CHECK: @__asan_mapping_offset = linkonce_odr constant i64 0 +; CHECK: @__asan_mapping_scale = linkonce_odr constant i64 2 + +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]], 2 + +; No need in shift for zero offset. +; CHECK-NOT: or i64 + +; CHECK: %[[LOAD_SHADOW_PTR:[^ ]*]] = inttoptr +; CHECK: %[[LOAD_SHADOW:[^ ]*]] = load i8* %[[LOAD_SHADOW_PTR]] +; CHECK: icmp ne i8 +; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}} + +; No need in slow path for i32 and mapping scale equal to 2. +; CHECK-NOT: and i64 %[[LOAD_ADDR]] +; +; The crash block reports the error. +; CHECK: call void @__asan_report_load4(i64 %[[LOAD_ADDR]]) +; CHECK: unreachable +; +; The actual load. +; CHECK: %tmp1 = load i32* %a +; CHECK: ret i32 %tmp1 + +entry: + %tmp1 = load i32* %a + ret i32 %tmp1 +} + |