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50c8d56daa
Summary: This change reverts r318575 and changes FindDynamicShadowStart() to keep the memory range it found mapped PROT_NONE to make sure it is not reused. We also skip MemoryRangeIsAvailable() check, because it is (a) unnecessary, and (b) would fail anyway. Reviewers: pcc, vitalybuka, kcc Subscribers: srhines, kubamracek, mgorny, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D40203 llvm-svn: 318666
48 lines
2.3 KiB
LLVM
48 lines
2.3 KiB
LLVM
; Test -asan-with-ifunc flag.
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;
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; RUN: opt -asan -asan-module -S -asan-with-ifunc=0 < %s | \
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; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-NOIFUNC
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; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 < %s | \
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; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-IFUNC
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; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=1 < %s | \
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; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-IFUNC-NOREMAT
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; Pre-Lollipop Android does not support ifunc.
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; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 -mtriple=armv7-linux-android20 < %s | \
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; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-NOIFUNC
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; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 -mtriple=armv7-linux-android < %s | \
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; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-NOIFUNC
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; RUN: opt -asan -asan-module -S -asan-with-ifunc=1 -asan-with-ifunc-suppress-remat=0 -mtriple=armv7-linux-android21 < %s | \
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; RUN: FileCheck %s --check-prefixes=CHECK,CHECK-IFUNC
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "armv7--linux-android22"
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; CHECK-IFUNC: @__asan_shadow = external global [0 x i8]
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; CHECK-NOIFUNC: @__asan_shadow_memory_dynamic_address = external global i32
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define i32 @test_load(i32* %a) sanitize_address {
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; First instrumentation in the function must be to load the dynamic shadow
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; address into a local variable.
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; CHECK-LABEL: @test_load
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; CHECK: entry:
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; CHECK-IFUNC-NEXT: %[[A:[^ ]*]] = ptrtoint i32* %a to i32
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; CHECK-IFUNC-NEXT: %[[B:[^ ]*]] = lshr i32 %[[A]], 3
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; CHECK-IFUNC-NEXT: %[[C:[^ ]*]] = add i32 %[[B]], ptrtoint ([0 x i8]* @__asan_shadow to i32)
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; CHECK-IFUNC-NOREMAT-NEXT: %[[S:[^ ]*]] = call i32 asm "", "=r,0"([0 x i8]* @__asan_shadow)
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; CHECK-IFUNC-NOREMAT-NEXT: %[[A:[^ ]*]] = ptrtoint i32* %a to i32
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; CHECK-IFUNC-NOREMAT-NEXT: %[[B:[^ ]*]] = lshr i32 %[[A]], 3
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; CHECK-IFUNC-NOREMAT-NEXT: %[[C:[^ ]*]] = add i32 %[[B]], %[[S]]
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; CHECK-NOIFUNC-NEXT: %[[SHADOW:[^ ]*]] = load i32, i32* @__asan_shadow_memory_dynamic_address
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; CHECK-NOIFUNC-NEXT: %[[A:[^ ]*]] = ptrtoint i32* %a to i32
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; CHECK-NOIFUNC-NEXT: %[[B:[^ ]*]] = lshr i32 %[[A]], 3
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; CHECK-NOIFUNC-NEXT: %[[C:[^ ]*]] = add i32 %[[B]], %[[SHADOW]]
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entry:
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%x = load i32, i32* %a, align 4
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ret i32 %x
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}
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