derek.holloway
7502bf64a4
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102 lines
4.0 KiB
LLVM
102 lines
4.0 KiB
LLVM
; RUN: opt < %s -passes=asan -asan-globals-live-support=1 -S | FileCheck %s
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; RUN: opt < %s -passes=asan -asan-globals-live-support=1 -asan-mapping-scale=5 -S | FileCheck %s
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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"
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target triple = "x86_64-unknown-linux-gnu"
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@xxx = global i32 0, align 4
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; If a global is present, __asan_[un]register_globals should be called from
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; module ctor/dtor
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; CHECK: @___asan_gen_module = private constant [8 x i8] c"<stdin>\00", align 1
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; CHECK: @llvm.used = appending global [2 x ptr] [ptr @asan.module_ctor, ptr @asan.module_dtor], section "llvm.metadata"
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; CHECK: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 1, ptr @asan.module_ctor, ptr @asan.module_ctor }]
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; CHECK: @llvm.global_dtors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 1, ptr @asan.module_dtor, ptr @asan.module_dtor }]
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; Test that we don't instrument global arrays with static initializer
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; indexed with constants in-bounds. But instrument all other cases.
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@GlobSt = global [10 x i32] zeroinitializer, align 16 ; static initializer
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@GlobStAlignInBounds = global [10 x i8] zeroinitializer, align 16 ; static initializer
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@GlobDy = global [10 x i32] zeroinitializer, align 16, sanitize_address_dyninit ; dynamic initializer
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@GlobEx = external global [10 x i32] , align 16 ; extern initializer
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; GlobSt is declared here, and has static initializer -- ok to optimize.
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define i32 @AccessGlobSt_0_2() sanitize_address {
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entry:
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%0 = load i32, ptr getelementptr inbounds ([10 x i32], ptr @GlobSt, i64 0, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobSt_0_2
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; CHECK-NOT: __asan_report
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; CHECK: ret i32 %0
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}
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; GlobSt is accessed out of bounds -- can't optimize
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define i32 @AccessGlobSt_0_12() sanitize_address {
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entry:
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%0 = load i32, ptr getelementptr inbounds ([10 x i32], ptr @GlobSt, i64 0, i64 12), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobSt_0_12
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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; GlobSt is accessed with Gep that has non-0 first index -- can't optimize.
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define i32 @AccessGlobSt_1_2() sanitize_address {
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entry:
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%0 = load i32, ptr getelementptr inbounds ([10 x i32], ptr @GlobSt, i64 1, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobSt_1_2
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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; GlobStAlignInBount is accessed with out of bounds index, but in bounds of allocated area (because of alignemnt)
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define i8 @AccessGlobStAlignInBounds_0_11() sanitize_address {
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entry:
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%0 = load i8, ptr getelementptr inbounds ([10 x i8], ptr @GlobStAlignInBounds, i64 0, i64 11), align 1
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ret i8 %0
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; CHECK-LABEL: define i8 @AccessGlobStAlignInBounds_0_11
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; CHECK: __asan_report
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; CHECK: ret i8
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}
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; GlobStAlignInBount is accessed with in-bound index
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define i8 @AccessGlobStAlignInBounds_0_9() sanitize_address {
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entry:
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%0 = load i8, ptr getelementptr inbounds ([10 x i8], ptr @GlobStAlignInBounds, i64 0, i64 9), align 1
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ret i8 %0
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; CHECK-LABEL: define i8 @AccessGlobStAlignInBounds_0_9
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; CHECK-NOT: __asan_report
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; CHECK: ret i8
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}
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; GlobDy is declared with dynamic initializer -- can't optimize.
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define i32 @AccessGlobDy_0_2() sanitize_address {
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entry:
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%0 = load i32, ptr getelementptr inbounds ([10 x i32], ptr @GlobDy, i64 0, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobDy_0_2
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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; GlobEx is an external global -- can't optimize.
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define i32 @AccessGlobEx_0_2() sanitize_address {
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entry:
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%0 = load i32, ptr getelementptr inbounds ([10 x i32], ptr @GlobEx, i64 0, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobEx_0_2
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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; CHECK-LABEL: define internal void @asan.module_ctor
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; CHECK-NOT: ret
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; CHECK: call void @__asan_register_elf_globals
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; CHECK: ret
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; CHECK-LABEL: define internal void @asan.module_dtor
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; CHECK-NOT: ret
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; CHECK: call void @__asan_unregister_elf_globals
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; CHECK: ret
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