394 lines
12 KiB
LLVM
394 lines
12 KiB
LLVM
; KMSAN instrumentation tests
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; RUN: opt < %s -msan-kernel=1 -S -passes=msan 2>&1 | FileCheck %s \
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; RUN: -check-prefixes=CHECK
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; RUN: opt < %s -msan -msan-kernel=1 -S | FileCheck %s -check-prefixes=CHECK
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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"
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target triple = "x86_64-unknown-linux-gnu"
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; Check the instrumentation prologue.
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define void @Empty() nounwind uwtable sanitize_memory {
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entry:
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ret void
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}
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; CHECK-LABEL: @Empty
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; %param_shadow:
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; CHECK: getelementptr {{.*}} i32 0, i32 0
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; %retval_shadow:
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; CHECK: getelementptr {{.*}} i32 0, i32 1
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; %va_arg_shadow:
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; CHECK: getelementptr {{.*}} i32 0, i32 2
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; %va_arg_origin:
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; CHECK: getelementptr {{.*}} i32 0, i32 3
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; %va_arg_overflow_size:
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; CHECK: getelementptr {{.*}} i32 0, i32 4
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; %param_origin:
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; CHECK: getelementptr {{.*}} i32 0, i32 5
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; %retval_origin:
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; CHECK: getelementptr {{.*}} i32 0, i32 6
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; Check instrumentation of stores
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define void @Store1(i8* nocapture %p, i8 %x) nounwind uwtable sanitize_memory {
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entry:
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store i8 %x, i8* %p
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ret void
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}
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; CHECK-LABEL: @Store1
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: [[BASE:%[0-9]+]] = ptrtoint {{.*}} [[PARAM_SHADOW]]
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; CHECK: [[SHADOW_PTR:%[a-z0-9_]+]] = inttoptr {{.*}} [[BASE]]
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; CHECK: [[SHADOW:%[a-z0-9]+]] = load i64, i64* [[SHADOW_PTR]]
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; CHECK: [[BASE2:%[0-9]+]] = ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: icmp ne i64 [[SHADOW]]
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: @__msan_metadata_ptr_for_store_1(i8* %p)
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; CHECK: store i8
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; If the new shadow is non-zero, jump to __msan_chain_origin()
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: @__msan_chain_origin
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; Storing origin here:
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; CHECK: store i32
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; CHECK: br label
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; CHECK: {{^[0-9]+}}:
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; CHECK: store i8
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; CHECK: ret void
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define void @Store2(i16* nocapture %p, i16 %x) nounwind uwtable sanitize_memory {
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entry:
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store i16 %x, i16* %p
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ret void
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}
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; CHECK-LABEL: @Store2
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: [[REG:%[0-9]+]] = bitcast i16* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_store_2(i8* [[REG]])
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; CHECK: store i16
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; If the new shadow is non-zero, jump to __msan_chain_origin()
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: @__msan_chain_origin
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; Storing origin here:
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; CHECK: store i32
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; CHECK: br label
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; CHECK: {{^[0-9]+}}:
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; CHECK: store i16
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; CHECK: ret void
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define void @Store4(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
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entry:
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store i32 %x, i32* %p
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ret void
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}
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; CHECK-LABEL: @Store4
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i32
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: [[REG:%[0-9]+]] = bitcast i32* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_store_4(i8* [[REG]])
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; CHECK: store i32
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; If the new shadow is non-zero, jump to __msan_chain_origin()
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: @__msan_chain_origin
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; Storing origin here:
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; CHECK: store i32
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; CHECK: br label
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; CHECK: {{^[0-9]+}}:
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; CHECK: store i32
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; CHECK: ret void
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define void @Store8(i64* nocapture %p, i64 %x) nounwind uwtable sanitize_memory {
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entry:
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store i64 %x, i64* %p
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ret void
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}
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; CHECK-LABEL: @Store8
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: [[REG:%[0-9]+]] = bitcast i64* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_store_8(i8* [[REG]])
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; CHECK: store i64
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; If the new shadow is non-zero, jump to __msan_chain_origin()
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: @__msan_chain_origin
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; Storing origin here:
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; CHECK: store i64
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; CHECK: br label
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; CHECK: {{^[0-9]+}}:
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; CHECK: store i64
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; CHECK: ret void
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define void @Store16(i128* nocapture %p, i128 %x) nounwind uwtable sanitize_memory {
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entry:
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store i128 %x, i128* %p
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ret void
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}
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; CHECK-LABEL: @Store16
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: [[REG:%[0-9]+]] = bitcast i128* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_store_n(i8* [[REG]], i64 16)
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; CHECK: store i128
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; If the new shadow is non-zero, jump to __msan_chain_origin()
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; CHECK: @__msan_chain_origin
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; Storing origin here:
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; CHECK: store i64
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; CHECK: br label
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; CHECK: {{^[0-9]+}}:
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; CHECK: store i128
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; CHECK: ret void
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; Check instrumentation of loads
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define i8 @Load1(i8* nocapture %p) nounwind uwtable sanitize_memory {
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entry:
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%0 = load i8, i8* %p
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ret i8 %0
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}
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; CHECK-LABEL: @Load1
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; Load the value from %p. This is done before accessing the shadow
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; to ease atomic handling.
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; CHECK: load i8
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; CHECK: @__msan_metadata_ptr_for_load_1(i8* %p)
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; Load the shadow and origin.
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; CHECK: load i8
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; CHECK: load i32
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define i16 @Load2(i16* nocapture %p) nounwind uwtable sanitize_memory {
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entry:
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%0 = load i16, i16* %p
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ret i16 %0
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}
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; CHECK-LABEL: @Load2
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; Load the value from %p. This is done before accessing the shadow
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; to ease atomic handling.
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; CHECK: load i16
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; CHECK: [[REG:%[0-9]+]] = bitcast i16* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_load_2(i8* [[REG]])
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; Load the shadow and origin.
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; CHECK: load i16
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; CHECK: load i32
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define i32 @Load4(i32* nocapture %p) nounwind uwtable sanitize_memory {
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entry:
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%0 = load i32, i32* %p
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ret i32 %0
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}
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; CHECK-LABEL: @Load4
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; Load the value from %p. This is done before accessing the shadow
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; to ease atomic handling.
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; CHECK: load i32
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; CHECK: [[REG:%[0-9]+]] = bitcast i32* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_load_4(i8* [[REG]])
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; Load the shadow and origin.
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; CHECK: load i32
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; CHECK: load i32
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define i64 @Load8(i64* nocapture %p) nounwind uwtable sanitize_memory {
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entry:
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%0 = load i64, i64* %p
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ret i64 %0
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}
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; CHECK-LABEL: @Load8
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; Load the value from %p. This is done before accessing the shadow
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; to ease atomic handling.
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; CHECK: load i64
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; CHECK: [[REG:%[0-9]+]] = bitcast i64* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_load_8(i8* [[REG]])
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; Load the shadow and origin.
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; CHECK: load i64
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; CHECK: load i32
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define i128 @Load16(i128* nocapture %p) nounwind uwtable sanitize_memory {
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entry:
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%0 = load i128, i128* %p
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ret i128 %0
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}
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; CHECK-LABEL: @Load16
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: ptrtoint {{.*}} [[PARAM_SHADOW]]
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; Load the shadow of %p and check it
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; CHECK: load i64
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; CHECK: icmp
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; CHECK: br i1
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; CHECK: {{^[0-9]+}}:
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; Load the value from %p. This is done before accessing the shadow
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; to ease atomic handling.
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; CHECK: load i128
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; CHECK: [[REG:%[0-9]+]] = bitcast i128* %p to i8*
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; CHECK: @__msan_metadata_ptr_for_load_n(i8* [[REG]], i64 16)
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; Load the shadow and origin.
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; CHECK: load i128
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; CHECK: load i32
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; Test kernel-specific va_list instrumentation
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%struct.__va_list_tag = type { i32, i32, i8*, i8* }
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declare void @llvm.va_start(i8*) nounwind
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declare void @llvm.va_end(i8*)
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@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
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declare dso_local i32 @VAListFn(i8*, %struct.__va_list_tag*) local_unnamed_addr
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; Function Attrs: nounwind uwtable
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define dso_local i32 @VarArgFn(i8* %fmt, ...) local_unnamed_addr sanitize_memory #0 {
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entry:
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%args = alloca [1 x %struct.__va_list_tag], align 16
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%0 = bitcast [1 x %struct.__va_list_tag]* %args to i8*
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%arraydecay = getelementptr inbounds [1 x %struct.__va_list_tag], [1 x %struct.__va_list_tag]* %args, i64 0, i64 0
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call void @llvm.va_start(i8* nonnull %0)
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%call = call i32 @VAListFn(i8* %fmt, %struct.__va_list_tag* nonnull %arraydecay)
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call void @llvm.va_end(i8* nonnull %0)
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ret i32 %call
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}
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; Kernel is built without SSE support.
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attributes #0 = { "target-features"="+fxsr,+x87,-sse" }
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; CHECK-LABEL: @VarArgFn
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; CHECK: @__msan_get_context_state()
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; CHECK: [[VA_ARG_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 2
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; CHECK: [[VA_ARG_ORIGIN:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 3
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; CHECK: [[VA_ARG_OVERFLOW_SIZE:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 4
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; CHECK: [[OSIZE:%[0-9]+]] = load i64, i64* [[VA_ARG_OVERFLOW_SIZE]]
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; Register save area is 48 bytes for non-SSE builds.
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; CHECK: [[SIZE:%[0-9]+]] = add i64 48, [[OSIZE]]
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; CHECK: [[SHADOWS:%[0-9]+]] = alloca i8, i64 [[SIZE]]
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; CHECK: [[VA_ARG_SHADOW]]
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; CHECK: call void @llvm.memcpy{{.*}}(i8* align 8 [[SHADOWS]], {{.*}}, i64 [[SIZE]]
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; CHECK: [[ORIGINS:%[0-9]+]] = alloca i8, i64 [[SIZE]]
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; CHECK: [[VA_ARG_ORIGIN]]
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; CHECK: call void @llvm.memcpy{{.*}}(i8* align 8 [[ORIGINS]], {{.*}}, i64 [[SIZE]]
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; CHECK: call i32 @VAListFn
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; Function Attrs: nounwind uwtable
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define dso_local void @VarArgCaller() local_unnamed_addr sanitize_memory {
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entry:
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%call = tail call i32 (i8*, ...) @VarArgFn(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 123)
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ret void
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}
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; CHECK-LABEL: @VarArgCaller
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; CHECK: entry:
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; CHECK: @__msan_get_context_state()
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; CHECK: [[PARAM_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 0
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; CHECK: [[VA_ARG_SHADOW:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 2
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; CHECK: [[VA_ARG_OVERFLOW_SIZE:%[a-z0-9_]+]] = getelementptr {{.*}} i32 0, i32 4
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; CHECK: [[PARAM_SI:%[_a-z0-9]+]] = ptrtoint {{.*}} [[PARAM_SHADOW]]
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; CHECK: [[ARG1_S:%[_a-z0-9]+]] = inttoptr i64 [[PARAM_SI]] to i64*
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; First argument is initialized
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; CHECK: store i64 0, i64* [[ARG1_S]]
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; Dangling cast of va_arg_shadow[0], unused because the first argument is fixed.
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; CHECK: [[VA_CAST0:%[_a-z0-9]+]] = ptrtoint {{.*}} [[VA_ARG_SHADOW]] to i64
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; CHECK: [[VA_CAST1:%[_a-z0-9]+]] = ptrtoint {{.*}} [[VA_ARG_SHADOW]] to i64
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; CHECK: [[ARG1_SI:%[_a-z0-9]+]] = add i64 [[VA_CAST1]], 8
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; CHECK: [[PARG1_S:%[_a-z0-9]+]] = inttoptr i64 [[ARG1_SI]] to i32*
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; Shadow for 123 is 0.
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; CHECK: store i32 0, i32* [[ARG1_S]]
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; CHECK: store i64 0, i64* [[VA_ARG_OVERFLOW_SIZE]]
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; CHECK: call i32 (i8*, ...) @VarArgFn({{.*}} @.str{{.*}} i32 123)
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