diff options
Diffstat (limited to 'test/Instrumentation/AddressSanitizer/instrument_global.ll')
| -rw-r--r-- | test/Instrumentation/AddressSanitizer/instrument_global.ll | 65 |
1 files changed, 63 insertions, 2 deletions
diff --git a/test/Instrumentation/AddressSanitizer/instrument_global.ll b/test/Instrumentation/AddressSanitizer/instrument_global.ll index 2c183f5..4717277 100644 --- a/test/Instrumentation/AddressSanitizer/instrument_global.ll +++ b/test/Instrumentation/AddressSanitizer/instrument_global.ll @@ -9,12 +9,73 @@ target triple = "x86_64-unknown-linux-gnu" ; CHECK: llvm.global_ctors ; CHECK: llvm.global_dtors -; CHECK: define internal void @asan.module_ctor +; Test that we don't instrument global arrays with static initializer +; indexed with constants in-bounds. But instrument all other cases. + +@GlobSt = global [10 x i32] zeroinitializer, align 16 ; static initializer +@GlobDy = global [10 x i32] zeroinitializer, align 16 ; dynamic initializer +@GlobEx = external global [10 x i32] , align 16 ; extern initializer + +; GlobSt is declared here, and has static initializer -- ok to optimize. +define i32 @AccessGlobSt_0_2() sanitize_address { +entry: + %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 2), align 8 + ret i32 %0 +; CHECK-LABEL: define i32 @AccessGlobSt_0_2 +; CHECK-NOT: __asan_report +; CHECK: ret i32 %0 +} + +; GlobSt is accessed out of bounds -- can't optimize +define i32 @AccessGlobSt_0_12() sanitize_address { +entry: + %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 12), align 8 + ret i32 %0 +; CHECK-LABEL: define i32 @AccessGlobSt_0_12 +; CHECK: __asan_report +; CHECK: ret i32 +} + +; GlobSt is accessed with Gep that has non-0 first index -- can't optimize. +define i32 @AccessGlobSt_1_2() sanitize_address { +entry: + %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 1, i64 2), align 8 + ret i32 %0 +; CHECK-LABEL: define i32 @AccessGlobSt_1_2 +; CHECK: __asan_report +; CHECK: ret i32 +} + +; GlobDy is declared with dynamic initializer -- can't optimize. +define i32 @AccessGlobDy_0_2() sanitize_address { +entry: + %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobDy, i64 0, i64 2), align 8 + ret i32 %0 +; CHECK-LABEL: define i32 @AccessGlobDy_0_2 +; CHECK: __asan_report +; CHECK: ret i32 +} + +; GlobEx is an external global -- can't optimize. +define i32 @AccessGlobEx_0_2() sanitize_address { +entry: + %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobEx, i64 0, i64 2), align 8 + ret i32 %0 +; CHECK-LABEL: define i32 @AccessGlobEx_0_2 +; CHECK: __asan_report +; CHECK: ret i32 +} + + +!llvm.asan.dynamically_initialized_globals = !{!0} +!0 = metadata !{[10 x i32]* @GlobDy} + +; CHECK-LABEL: 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-LABEL: define internal void @asan.module_dtor ; CHECK-NOT: ret ; CHECK: call void @__asan_unregister_globals ; CHECK: ret |