| ; RUN: opt < %s -asan -asan-module -asan-use-after-return -S | FileCheck --check-prefix=CHECK-UAR %s |
| ; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -S | FileCheck --check-prefix=CHECK-PLAIN %s |
| target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| declare void @Foo(i8*) |
| |
| define void @Bar() uwtable sanitize_address { |
| entry: |
| ; CHECK-PLAIN-LABEL: Bar |
| ; CHECK-PLAIN-NOT: label |
| ; CHECK-PLAIN: ret void |
| |
| ; CHECK-UAR-LABEL: Bar |
| ; CHECK-UAR: load i32, i32* @__asan_option_detect_stack_use_after_return |
| ; CHECK-UAR: label |
| ; CHECK-UAR: call i64 @__asan_stack_malloc_1 |
| ; CHECK-UAR: label |
| ; CHECK-UAR: call void @Foo |
| ; If LocalStackBase != OrigStackBase |
| ; CHECK-UAR: label |
| ; Then Block: poison the entire frame. |
| ; CHECK-UAR: store i64 -723401728380766731 |
| ; CHECK-UAR: store i64 -723401728380766731 |
| ; CHECK-UAR: store i8 0 |
| ; CHECK-UAR-NOT: store |
| ; CHECK-UAR: label |
| ; Else Block: no UAR frame. Only unpoison the redzones. |
| ; CHECK-UAR: store i64 0 |
| ; CHECK-UAR: store i32 0 |
| ; CHECK-UAR-NOT: store |
| ; CHECK-UAR: label |
| ; Done, no more stores. |
| ; CHECK-UAR-NOT: store |
| ; CHECK-UAR: ret void |
| |
| %x = alloca [20 x i8], align 16 |
| %arraydecay = getelementptr inbounds [20 x i8], [20 x i8]* %x, i64 0, i64 0 |
| call void @Foo(i8* %arraydecay) |
| ret void |
| } |
| |
| |