1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -asan -asan-module -asan-use-after-return -S | FileCheck --check-prefix=CHECK-UAR %s 2*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -S | FileCheck --check-prefix=CHECK-PLAIN %s 3*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128" 4*9880d681SAndroid Build Coastguard Workertarget triple = "x86_64-unknown-linux-gnu" 5*9880d681SAndroid Build Coastguard Worker 6*9880d681SAndroid Build Coastguard Workerdeclare void @Foo(i8*) 7*9880d681SAndroid Build Coastguard Worker 8*9880d681SAndroid Build Coastguard Workerdefine void @Bar() uwtable sanitize_address { 9*9880d681SAndroid Build Coastguard Workerentry: 10*9880d681SAndroid Build Coastguard Worker; CHECK-PLAIN-LABEL: Bar 11*9880d681SAndroid Build Coastguard Worker; CHECK-PLAIN-NOT: label 12*9880d681SAndroid Build Coastguard Worker; CHECK-PLAIN: ret void 13*9880d681SAndroid Build Coastguard Worker 14*9880d681SAndroid Build Coastguard Worker; CHECK-UAR-LABEL: Bar 15*9880d681SAndroid Build Coastguard Worker; CHECK-UAR: load i32, i32* @__asan_option_detect_stack_use_after_return 16*9880d681SAndroid Build Coastguard Worker; CHECK-UAR: label 17*9880d681SAndroid Build Coastguard Worker; CHECK-UAR: call i64 @__asan_stack_malloc_1 18*9880d681SAndroid Build Coastguard Worker; CHECK-UAR: label 19*9880d681SAndroid Build Coastguard Worker; CHECK-UAR: call void @Foo 20*9880d681SAndroid Build Coastguard Worker; If LocalStackBase != OrigStackBase 21*9880d681SAndroid Build Coastguard Worker; CHECK-UAR: label 22*9880d681SAndroid Build Coastguard Worker; Then Block: poison the entire frame. 23*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR: store i64 -723401728380766731 24*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR: store i64 -723401728380766731 25*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR: store i8 0 26*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR-NOT: store 27*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR: label 28*9880d681SAndroid Build Coastguard Worker; Else Block: no UAR frame. Only unpoison the redzones. 29*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR: store i64 0 30*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR: store i32 0 31*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR-NOT: store 32*9880d681SAndroid Build Coastguard Worker ; CHECK-UAR: label 33*9880d681SAndroid Build Coastguard Worker; Done, no more stores. 34*9880d681SAndroid Build Coastguard Worker; CHECK-UAR-NOT: store 35*9880d681SAndroid Build Coastguard Worker; CHECK-UAR: ret void 36*9880d681SAndroid Build Coastguard Worker 37*9880d681SAndroid Build Coastguard Worker %x = alloca [20 x i8], align 16 38*9880d681SAndroid Build Coastguard Worker %arraydecay = getelementptr inbounds [20 x i8], [20 x i8]* %x, i64 0, i64 0 39*9880d681SAndroid Build Coastguard Worker call void @Foo(i8* %arraydecay) 40*9880d681SAndroid Build Coastguard Worker ret void 41*9880d681SAndroid Build Coastguard Worker} 42*9880d681SAndroid Build Coastguard Worker 43*9880d681SAndroid Build Coastguard Worker 44