56 lines
1.6 KiB
LLVM
56 lines
1.6 KiB
LLVM
; RUN: opt < %s -msan-check-access-address=0 -msan-check-constant-shadow=1 \
|
|
; RUN: -msan-track-origins=1 -S -passes=msan 2>&1 | FileCheck %s
|
|
; RUN: opt < %s -msan -msan-check-access-address=0 -msan-check-constant-shadow=1 -msan-track-origins=1 -S | FileCheck %s
|
|
|
|
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"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
; Test that returning a literal undef from main() triggers an MSan warning.
|
|
|
|
; main() is special: it inserts check for the return value
|
|
define i32 @main() nounwind uwtable sanitize_memory {
|
|
entry:
|
|
ret i32 undef
|
|
}
|
|
|
|
; CHECK-LABEL: @main
|
|
; CHECK: call void @__msan_warning_with_origin_noreturn
|
|
; CHECK: ret i32 undef
|
|
|
|
|
|
; This function stores known initialized value.
|
|
; Expect 2 stores: one for the shadow (0), one for the value (42), but no origin.
|
|
define void @StoreConstant(i32* nocapture %p) nounwind uwtable sanitize_memory {
|
|
entry:
|
|
store i32 42, i32* %p, align 4
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: @StoreConstant
|
|
; CHECK-NOT: store i32
|
|
; CHECK: store i32 0,
|
|
; CHECK-NOT: store i32
|
|
; CHECK: store i32 42,
|
|
; CHECK-NOT: store i32
|
|
; CHECK: ret void
|
|
|
|
|
|
; This function stores known uninitialized value.
|
|
; Expect 3 stores: shadow, value and origin.
|
|
; Expect no icmp(s): everything here is unconditional.
|
|
define void @StoreUndef(i32* nocapture %p) nounwind uwtable sanitize_memory {
|
|
entry:
|
|
store i32 undef, i32* %p, align 4
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: @StoreUndef
|
|
; CHECK-NOT: icmp
|
|
; CHECK: store i32
|
|
; CHECK-NOT: icmp
|
|
; CHECK: store i32
|
|
; CHECK-NOT: icmp
|
|
; CHECK: store i32
|
|
; CHECK-NOT: icmp
|
|
; CHECK: ret void
|