55 lines
2.6 KiB
LLVM
55 lines
2.6 KiB
LLVM
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; Test alloca instrumentation.
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;
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; RUN: opt < %s -hwasan -hwasan-with-ifunc=1 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,NO-UAR-TAGS
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; RUN: opt < %s -hwasan -hwasan-mapping-offset=0 -S | FileCheck %s --check-prefixes=CHECK,ZERO-BASED-SHADOW,NO-UAR-TAGS
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; RUN: opt < %s -hwasan -hwasan-with-ifunc=1 -hwasan-uar-retag-to-zero=0 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,UAR-TAGS
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64--linux-android10000"
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declare void @use32(i32*)
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define void @test_alloca() sanitize_hwaddress {
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; CHECK-LABEL: @test_alloca(
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; CHECK: %[[FP:[^ ]*]] = call i8* @llvm.frameaddress.p0i8(i32 0)
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; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %[[FP]] to i64
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; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 20
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; CHECK: %[[BASE_TAG:[^ ]*]] = xor i64 %[[A]], %[[B]]
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; CHECK: %[[X:[^ ]*]] = alloca { i32, [12 x i8] }, align 16
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; CHECK: %[[X_BC:[^ ]*]] = bitcast { i32, [12 x i8] }* %[[X]] to i32*
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; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0
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; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64
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; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 56
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; CHECK: %[[D:[^ ]*]] = or i64 %[[X1]], %[[C]]
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; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[D]] to i32*
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; CHECK: %[[X_TAG2:[^ ]*]] = trunc i64 %[[X_TAG]] to i8
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; CHECK: %[[E:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64
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; CHECK: %[[F:[^ ]*]] = lshr i64 %[[E]], 4
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; DYNAMIC-SHADOW: %[[X_SHADOW:[^ ]*]] = getelementptr i8, i8* %.hwasan.shadow, i64 %[[F]]
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; ZERO-BASED-SHADOW: %[[X_SHADOW:[^ ]*]] = inttoptr i64 %[[F]] to i8*
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; CHECK: %[[X_SHADOW_GEP:[^ ]*]] = getelementptr i8, i8* %[[X_SHADOW]], i32 0
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; CHECK: store i8 4, i8* %[[X_SHADOW_GEP]]
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; CHECK: %[[X_I8:[^ ]*]] = bitcast i32* %[[X_BC]] to i8*
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; CHECK: %[[X_I8_GEP:[^ ]*]] = getelementptr i8, i8* %[[X_I8]], i32 15
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; CHECK: store i8 %[[X_TAG2]], i8* %[[X_I8_GEP]]
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; CHECK: call void @use32(i32* nonnull %[[X_HWASAN]])
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; UAR-TAGS: %[[BASE_TAG_COMPL:[^ ]*]] = xor i64 %[[BASE_TAG]], 255
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; UAR-TAGS: %[[X_TAG_UAR:[^ ]*]] = trunc i64 %[[BASE_TAG_COMPL]] to i8
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; CHECK: %[[E2:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64
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; CHECK: %[[F2:[^ ]*]] = lshr i64 %[[E2]], 4
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; DYNAMIC-SHADOW: %[[X_SHADOW2:[^ ]*]] = getelementptr i8, i8* %.hwasan.shadow, i64 %[[F2]]
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; ZERO-BASED-SHADOW: %[[X_SHADOW2:[^ ]*]] = inttoptr i64 %[[F2]] to i8*
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; NO-UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 0, i64 1, i1 false)
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; UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 %[[X_TAG_UAR]], i64 1, i1 false)
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; CHECK: ret void
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entry:
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%x = alloca i32, align 4
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call void @use32(i32* nonnull %x)
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ret void
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}
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