1 ; RUN: opt < %s -asan -asan-module -asan-globals-live-support=1 -S | FileCheck %s 2 ; RUN: opt < %s -asan -asan-module -asan-globals-live-support=1 -asan-mapping-scale=5 -S | FileCheck %s 3 4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5 target triple = "x86_64-unknown-linux-gnu" 6 7 ; Globals: 8 @global = global i32 0, align 4 9 @dyn_init_global = global i32 0, align 4 10 @blacklisted_global = global i32 0, align 4 11 @_ZZ4funcvE10static_var = internal global i32 0, align 4 12 @.str = private unnamed_addr constant [14 x i8] c"Hello, world!\00", align 1 13 @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_asan_globals.cpp, i8* null }] 14 15 ; Check that globals were instrumented: 16 17 ; CHECK: @global = global { i32, [60 x i8] } zeroinitializer, comdat, align 32 18 ; CHECK: @.str = internal unnamed_addr constant { [14 x i8], [50 x i8] } { [14 x i8] c"Hello, world!\00", [50 x i8] zeroinitializer }, comdat($".str${{[01-9a-f]+}}"), align 32 19 20 ; Check emitted location descriptions: 21 ; CHECK: [[VARNAME:@___asan_gen_.[0-9]+]] = private unnamed_addr constant [7 x i8] c"global\00", align 1 22 ; CHECK: [[FILENAME:@___asan_gen_.[0-9]+]] = private unnamed_addr constant [22 x i8] c"/tmp/asan-globals.cpp\00", align 1 23 ; CHECK: [[LOCDESCR:@___asan_gen_.[0-9]+]] = private unnamed_addr constant { [22 x i8]*, i32, i32 } { [22 x i8]* [[FILENAME]], i32 5, i32 5 } 24 ; CHECK: @__asan_global_global = {{.*}}i64 ptrtoint ({ i32, [60 x i8] }* @global to i64){{.*}} section "asan_globals"{{.*}}, !associated 25 ; CHECK: @__asan_global_.str = {{.*}}i64 ptrtoint ({ [14 x i8], [50 x i8] }* @.str to i64){{.*}} section "asan_globals"{{.*}}, !associated 26 27 ; The metadata has to be inserted to llvm.compiler.used to avoid being stripped 28 ; during LTO. 29 ; CHECK: @llvm.compiler.used {{.*}} @__asan_global_global {{.*}} section "llvm.metadata" 30 31 ; Check that location descriptors and global names were passed into __asan_register_globals: 32 ; CHECK: call void @__asan_register_elf_globals(i64 ptrtoint (i64* @___asan_globals_registered to i64), i64 ptrtoint (i64* @__start_asan_globals to i64), i64 ptrtoint (i64* @__stop_asan_globals to i64)) 33 34 ; Function Attrs: nounwind sanitize_address 35 define internal void @__cxx_global_var_init() #0 section ".text.startup" { 36 entry: 37 %0 = load i32, i32* @global, align 4 38 store i32 %0, i32* @dyn_init_global, align 4 39 ret void 40 } 41 42 ; Function Attrs: nounwind sanitize_address 43 define void @_Z4funcv() #1 { 44 entry: 45 %literal = alloca i8*, align 8 46 store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i32 0, i32 0), i8** %literal, align 8 47 ret void 48 } 49 50 ; Function Attrs: nounwind sanitize_address 51 define internal void @_GLOBAL__sub_I_asan_globals.cpp() #0 section ".text.startup" { 52 entry: 53 call void @__cxx_global_var_init() 54 ret void 55 } 56 57 attributes #0 = { nounwind sanitize_address } 58 attributes #1 = { nounwind sanitize_address "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 59 60 !llvm.asan.globals = !{!0, !1, !2, !3, !4} 61 !llvm.ident = !{!5} 62 63 !0 = !{i32* @global, !6, !"global", i1 false, i1 false} 64 !1 = !{i32* @dyn_init_global, !7, !"dyn_init_global", i1 true, i1 false} 65 !2 = !{i32* @blacklisted_global, null, null, i1 false, i1 true} 66 !3 = !{i32* @_ZZ4funcvE10static_var, !8, !"static_var", i1 false, i1 false} 67 !4 = !{[14 x i8]* @.str, !9, !"<string literal>", i1 false, i1 false} 68 69 !5 = !{!"clang version 3.5.0 (211282)"} 70 71 !6 = !{!"/tmp/asan-globals.cpp", i32 5, i32 5} 72 !7 = !{!"/tmp/asan-globals.cpp", i32 7, i32 5} 73 !8 = !{!"/tmp/asan-globals.cpp", i32 12, i32 14} 74 !9 = !{!"/tmp/asan-globals.cpp", i32 14, i32 25} 75
