47 lines
2 KiB
LLVM
47 lines
2 KiB
LLVM
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; Test handling of llvm.lifetime intrinsics in UAR/UAS modes.
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; RUN: opt < %s -passes=asan -asan-use-after-return=never -asan-use-after-scope=0 -S | FileCheck %s
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; RUN: opt < %s -passes=asan -asan-use-after-return=runtime -asan-use-after-scope=0 -S | FileCheck %s
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; RUN: opt < %s -passes=asan -asan-use-after-return=always -asan-use-after-scope=0 -S | FileCheck %s
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; RUN: opt < %s -passes=asan -asan-use-after-return=never -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS
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; RUN: opt < %s -passes=asan -asan-use-after-return=runtime -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS
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; RUN: opt < %s -passes=asan -asan-use-after-return=always -asan-use-after-scope=1 -S | FileCheck %s --check-prefix=CHECK-UAS
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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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declare void @llvm.lifetime.start.p0(i64, ptr nocapture) nounwind
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declare void @llvm.lifetime.end.p0(i64, ptr nocapture) nounwind
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define i32 @basic_test(i64 %i) sanitize_address {
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; CHECK-LABEL: define i32 @basic_test(
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entry:
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%retval = alloca i32, align 4
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%c = alloca [2 x i8], align 1
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; Memory is poisoned in prologue: F1F1F1F104F3F8F2
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; CHECK-UAS: store i64 -866676825215864335, ptr %{{[0-9]+}}
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; CHECK-UAS-SS-NOT: store i64
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call void @llvm.lifetime.start.p0(i64 1, ptr %c)
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; Memory is unpoisoned at llvm.lifetime.start: 01
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; CHECK-UAS: store i8 2, ptr %{{[0-9]+}}
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%ci = getelementptr inbounds [2 x i8], ptr %c, i64 0, i64 %i
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store volatile i32 0, ptr %retval
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store volatile i8 0, ptr %ci, align 1
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call void @llvm.lifetime.end.p0(i64 1, ptr %c)
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; Memory is poisoned at llvm.lifetime.end: F8
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; CHECK-UAS: store i8 -8, ptr %{{[0-9]+}}
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; CHECK-UAS-SS-NOT: store i8 -8,
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; Unpoison memory at function exit in UAS mode.
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; CHECK-UAS: store i64 0, ptr %{{[0-9]+}}
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; CHECK-UAS: ret i32 0
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ret i32 0
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}
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; No poisoning/poisoning at all in plain mode.
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; CHECK-NOT: __asan_poison_stack_memory
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; CHECK-NOT: __asan_unpoison_stack_memory
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