1 ; Test handling of llvm.lifetime intrinsics in UAR/UAS modes. 2 ; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -asan-use-after-scope=0 -S | FileCheck %s 3 ; RUN: opt < %s -asan -asan-module -asan-use-after-return=1 -asan-use-after-scope=0 -S | FileCheck %s 4 ; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS 5 ; RUN: opt < %s -asan -asan-module -asan-use-after-return=1 -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS 6 7 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-S128" 8 9 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind 10 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) nounwind 11 12 define i32 @basic_test() sanitize_address { 13 ; CHECK-LABEL: define i32 @basic_test() 14 15 entry: 16 %retval = alloca i32, align 4 17 %c = alloca i8, align 1 18 19 ; Memory is poisoned in prologue: F1F1F1F104F3F8F2 20 ; CHECK-UAS: store i64 -866676825215864335, i64* %{{[0-9]+}} 21 22 call void @llvm.lifetime.start.p0i8(i64 1, i8* %c) 23 ; Memory is unpoisoned at llvm.lifetime.start: 01 24 ; CHECK-UAS: store i8 1, i8* %{{[0-9]+}} 25 26 store volatile i32 0, i32* %retval 27 store volatile i8 0, i8* %c, align 1 28 29 call void @llvm.lifetime.end.p0i8(i64 1, i8* %c) 30 ; Memory is poisoned at llvm.lifetime.end: F8 31 ; CHECK-UAS: store i8 -8, i8* %{{[0-9]+}} 32 33 ; Unpoison memory at function exit in UAS mode. 34 ; CHECK-UAS: store i64 0, i64* %{{[0-9]+}} 35 ; CHECK-UAS: ret i32 0 36 ret i32 0 37 } 38 39 ; No poisoning/poisoning at all in plain mode. 40 ; CHECK-NOT: __asan_poison_stack_memory 41 ; CHECK-NOT: __asan_unpoison_stack_memory 42
