1 ; RUN: opt < %s -asan -asan-module -S | FileCheck %s 2 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" 3 target triple = "x86_64-unknown-linux-gnu" 4 @xxx = global i32 0, align 4 5 6 ; If a global is present, __asan_[un]register_globals should be called from 7 ; module ctor/dtor 8 9 ; CHECK: llvm.global_ctors 10 ; CHECK: @__asan_gen_ = private constant [8 x i8] c"<stdin>\00", align 1 11 ; CHECK: llvm.global_dtors 12 13 ; Test that we don't instrument global arrays with static initializer 14 ; indexed with constants in-bounds. But instrument all other cases. 15 16 @GlobSt = global [10 x i32] zeroinitializer, align 16 ; static initializer 17 @GlobDy = global [10 x i32] zeroinitializer, align 16 ; dynamic initializer 18 @GlobEx = external global [10 x i32] , align 16 ; extern initializer 19 20 ; GlobSt is declared here, and has static initializer -- ok to optimize. 21 define i32 @AccessGlobSt_0_2() sanitize_address { 22 entry: 23 %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 2), align 8 24 ret i32 %0 25 ; CHECK-LABEL: define i32 @AccessGlobSt_0_2 26 ; CHECK-NOT: __asan_report 27 ; CHECK: ret i32 %0 28 } 29 30 ; GlobSt is accessed out of bounds -- can't optimize 31 define i32 @AccessGlobSt_0_12() sanitize_address { 32 entry: 33 %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 12), align 8 34 ret i32 %0 35 ; CHECK-LABEL: define i32 @AccessGlobSt_0_12 36 ; CHECK: __asan_report 37 ; CHECK: ret i32 38 } 39 40 ; GlobSt is accessed with Gep that has non-0 first index -- can't optimize. 41 define i32 @AccessGlobSt_1_2() sanitize_address { 42 entry: 43 %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 1, i64 2), align 8 44 ret i32 %0 45 ; CHECK-LABEL: define i32 @AccessGlobSt_1_2 46 ; CHECK: __asan_report 47 ; CHECK: ret i32 48 } 49 50 ; GlobDy is declared with dynamic initializer -- can't optimize. 51 define i32 @AccessGlobDy_0_2() sanitize_address { 52 entry: 53 %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobDy, i64 0, i64 2), align 8 54 ret i32 %0 55 ; CHECK-LABEL: define i32 @AccessGlobDy_0_2 56 ; CHECK: __asan_report 57 ; CHECK: ret i32 58 } 59 60 ; GlobEx is an external global -- can't optimize. 61 define i32 @AccessGlobEx_0_2() sanitize_address { 62 entry: 63 %0 = load i32* getelementptr inbounds ([10 x i32]* @GlobEx, i64 0, i64 2), align 8 64 ret i32 %0 65 ; CHECK-LABEL: define i32 @AccessGlobEx_0_2 66 ; CHECK: __asan_report 67 ; CHECK: ret i32 68 } 69 70 71 !llvm.asan.globals = !{!0} 72 !0 = metadata !{[10 x i32]* @GlobDy, null, i1 true, i1 false} 73 74 ; CHECK-LABEL: define internal void @asan.module_ctor 75 ; CHECK-NOT: ret 76 ; CHECK: call void @__asan_register_globals 77 ; CHECK: ret 78 79 ; CHECK-LABEL: define internal void @asan.module_dtor 80 ; CHECK-NOT: ret 81 ; CHECK: call void @__asan_unregister_globals 82 ; CHECK: ret 83
