44 lines
1.3 KiB
LLVM
44 lines
1.3 KiB
LLVM
; 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
|
|
}
|
|
|
|
|