1; Test that global metadata is placed in a separate section on Mach-O platforms,
2; allowing dead stripping to be performed, and that the appropriate runtime
3; routines are invoked.
4
5; RUN: opt < %s -asan -asan-module -enable-new-pm=0 -asan-use-private-alias=0 -asan-globals-live-support=1 -S | FileCheck %s --check-prefixes=CHECK,NOALIAS
6; RUN: opt < %s -passes='asan-pipeline'             -asan-use-private-alias=0 -asan-globals-live-support=1 -S | FileCheck %s --check-prefixes=CHECK,NOALIAS
7; RUN: opt < %s -asan -asan-module -enable-new-pm=0 -asan-use-private-alias=1 -asan-globals-live-support=1 -S | FileCheck %s --check-prefixes=CHECK,ALIAS
8; RUN: opt < %s -passes='asan-pipeline'             -asan-use-private-alias=1 -asan-globals-live-support=1 -S | FileCheck %s --check-prefixes=CHECK,ALIAS
9
10target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
11target triple = "x86_64-apple-macosx10.11.0"
12
13@global = global [1 x i32] zeroinitializer, align 4
14
15!llvm.asan.globals = !{!0}
16
17!0 = !{[1 x i32]* @global, !1, !"global", i1 false, i1 false}
18!1 = !{!"test-globals.c", i32 1, i32 5}
19
20
21; Find the metadata for @global:
22; NOALIAS: [[METADATA:@.+]] = internal global {{.*}} @global {{.*}} section "__DATA,__asan_globals,regular"
23; ALIAS: [[METADATA:@.+]] = internal global {{.*}} @0 {{.*}} section "__DATA,__asan_globals,regular"
24
25; Find the liveness binder for @global and its metadata:
26; NOALIAS: @__asan_binder_global = internal global {{.*}} @global {{.*}} [[METADATA]] {{.*}} section "__DATA,__asan_liveness,regular,live_support"
27; ALIAS: @__asan_binder_global = internal global {{.*}} @0 {{.*}} [[METADATA]] {{.*}} section "__DATA,__asan_liveness,regular,live_support"
28
29; The binder has to be inserted to llvm.compiler.used to avoid being stripped
30; during LTO.
31; CHECK: @llvm.compiler.used {{.*}} @__asan_binder_global {{.*}} section "llvm.metadata"
32
33; Test that there is the flag global variable:
34; CHECK: @___asan_globals_registered = common hidden global i64 0
35
36; ALIAS: @0 = private alias {{.*}} @global
37
38; Test that __asan_register_image_globals is invoked from the constructor:
39; CHECK-LABEL: define internal void @asan.module_ctor
40; CHECK-NOT: ret
41; CHECK: call void @__asan_register_image_globals(i64 ptrtoint (i64* @___asan_globals_registered to i64))
42; CHECK: ret
43
44; Test that __asan_unregister_image_globals is invoked from the destructor:
45; CHECK-LABEL: define internal void @asan.module_dtor
46; CHECK-NOT: ret
47; CHECK: call void @__asan_unregister_image_globals(i64 ptrtoint (i64* @___asan_globals_registered to i64))
48; CHECK: ret
49