| ; Check that we disable the use of comdat sections for the garbage collection |
| ; of globals. |
| ; This is to avoid false negative ODR violations detection at link time. |
| ; We keep using comdats for garbage collection if odr indicators are |
| ; enabled as indicator symbols will cause link time odr violations. |
| ; This is to fix PR 47925. |
| ; |
| ; RUN: opt < %s -passes='asan-pipeline' -asan-globals-live-support=1 -S | FileCheck %s --check-prefixes=CHECK,NOCOMDAT |
| ; Check that enabling odr indicators enables comdat for globals. |
| ; RUN: opt < %s -passes='asan-pipeline' -asan-globals-live-support=1 -asan-use-odr-indicator=1 -S | FileCheck %s --check-prefixes=CHECK,COMDAT |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Globals: |
| @global = global i32 0, align 4 |
| @dyn_init_global = global i32 0, align 4 |
| @blocked_global = global i32 0, align 4 |
| @_ZZ4funcvE10static_var = internal global i32 0, align 4 |
| @.str = private unnamed_addr constant [14 x i8] c"Hello, world!\00", align 1 |
| @llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_asan_globals.cpp, i8* null }] |
| |
| ; Check that globals were instrumented: |
| |
| ; COMDAT: $global = comdat any |
| ; COMDAT: $dyn_init_global = comdat any |
| ; COMDAT: $_ZZ4funcvE10static_var.{{[01-9a-f]+}} = comdat any |
| ; COMDAT: $.str.{{[01-9a-f]+}} = comdat any |
| |
| ; NOCOMDAT-NOT: $global = comdat any |
| ; NOCOMDAT-NOT: $dyn_init_global = comdat any |
| ; NOCOMDAT-NOT: $_ZZ4funcvE10static_var.{{[01-9a-f]+}} = comdat any |
| ; NOCOMDAT-NOT: $.str.{{[01-9a-f]+}} = comdat any |
| |
| ; COMDAT: @global = global { i32, [28 x i8] } zeroinitializer, comdat, align 32 |
| ; COMDAT: @dyn_init_global = global { i32, [28 x i8] } zeroinitializer, comdat, align 32 |
| ; COMDAT: @_ZZ4funcvE10static_var = internal global { i32, [28 x i8] } zeroinitializer, comdat($_ZZ4funcvE10static_var.{{[01-9a-f]+}}), align 32 |
| ; COMDAT: @.str = internal constant { [14 x i8], [18 x i8] } { [14 x i8] c"Hello, world!\00", [18 x i8] zeroinitializer }, comdat($.str.{{[01-9a-f]+}}), align 32 |
| |
| ; NOCOMDAT: @global = global { i32, [28 x i8] } zeroinitializer, align 32 |
| ; NOCOMDAT: @dyn_init_global = global { i32, [28 x i8] } zeroinitializer, align 32 |
| ; NOCOMDAT: @_ZZ4funcvE10static_var = internal global { i32, [28 x i8] } zeroinitializer, align 32 |
| ; NOCOMDAT: @.str = internal constant { [14 x i8], [18 x i8] } { [14 x i8] c"Hello, world!\00", [18 x i8] zeroinitializer }, align 32 |
| |
| ; Check emitted location descriptions: |
| ; CHECK: [[VARNAME:@___asan_gen_.[0-9]+]] = private unnamed_addr constant [7 x i8] c"global\00", align 1 |
| ; CHECK: [[FILENAME:@___asan_gen_.[0-9]+]] = private unnamed_addr constant [22 x i8] c"/tmp/asan-globals.cpp\00", align 1 |
| ; CHECK: [[LOCDESCR:@___asan_gen_.[0-9]+]] = private unnamed_addr constant { [22 x i8]*, i32, i32 } { [22 x i8]* [[FILENAME]], i32 5, i32 5 } |
| ; COMDAT: @__asan_global_global = {{.*}}i64 ptrtoint ({ i32, [28 x i8] }* @global to i64){{.*}} section "asan_globals"{{.*}}, !associated |
| ; COMDAT: @__asan_global_.str = {{.*}}i64 ptrtoint ({ [14 x i8], [18 x i8] }* @{{.str|1}} to i64){{.*}} section "asan_globals"{{.*}}, !associated |
| |
| ; The metadata has to be inserted to llvm.compiler.used to avoid being stripped |
| ; during LTO. |
| ; CHECK: @llvm.compiler.used {{.*}} @__asan_global_global {{.*}} section "llvm.metadata" |
| |
| ; Check that location descriptors and global names were passed into __asan_register_globals: |
| ; 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)) |
| |
| ; Function Attrs: nounwind sanitize_address |
| define internal void @__cxx_global_var_init() #0 section ".text.startup" { |
| entry: |
| %0 = load i32, i32* @global, align 4 |
| store i32 %0, i32* @dyn_init_global, align 4 |
| ret void |
| } |
| |
| ; Function Attrs: nounwind sanitize_address |
| define void @_Z4funcv() #1 { |
| entry: |
| %literal = alloca i8*, align 8 |
| store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i32 0, i32 0), i8** %literal, align 8 |
| ret void |
| } |
| |
| ; Function Attrs: nounwind sanitize_address |
| define internal void @_GLOBAL__sub_I_asan_globals.cpp() #0 section ".text.startup" { |
| entry: |
| call void @__cxx_global_var_init() |
| ret void |
| } |
| |
| attributes #0 = { nounwind sanitize_address } |
| attributes #1 = { nounwind sanitize_address "less-precise-fpmad"="false" "frame-pointer"="none" "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" } |
| |
| !llvm.asan.globals = !{!0, !1, !2, !3, !4} |
| !llvm.ident = !{!5} |
| |
| !0 = !{i32* @global, !6, !"global", i1 false, i1 false} |
| !1 = !{i32* @dyn_init_global, !7, !"dyn_init_global", i1 true, i1 false} |
| !2 = !{i32* @blocked_global, null, null, i1 false, i1 true} |
| !3 = !{i32* @_ZZ4funcvE10static_var, !8, !"static_var", i1 false, i1 false} |
| !4 = !{[14 x i8]* @.str, !9, !"<string literal>", i1 false, i1 false} |
| |
| !5 = !{!"clang version 3.5.0 (211282)"} |
| |
| !6 = !{!"/tmp/asan-globals.cpp", i32 5, i32 5} |
| !7 = !{!"/tmp/asan-globals.cpp", i32 7, i32 5} |
| !8 = !{!"/tmp/asan-globals.cpp", i32 12, i32 14} |
| !9 = !{!"/tmp/asan-globals.cpp", i32 14, i32 25} |