2018-02-22 03:52:23 +08:00
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; Test kernel hwasan instrumentation for alloca.
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2018-02-09 08:59:10 +08:00
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;
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; RUN: opt < %s -hwasan -hwasan-kernel=1 -S | FileCheck %s
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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-android"
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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(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, align 16
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; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0
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; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X]] to i64
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; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 56
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; CHECK: %[[D:[^ ]*]] = or i64 %[[C]], 72057594037927935
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; CHECK: %[[E:[^ ]*]] = and i64 %[[X1]], %[[D]]
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; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[E]] to i32*
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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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