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|
; Test basic address sanitizer instrumentation.
;
; RUN: opt < %s -passes=asan -S | FileCheck --check-prefixes=CHECK,CHECK-S3 %s
; RUN: opt < %s -passes=asan -asan-mapping-scale=5 -S | FileCheck --check-prefixes=CHECK,CHECK-S5 %s
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"
target triple = "x86_64-unknown-linux-gnu"
; CHECK: @llvm.used = appending global [1 x ptr] [ptr @asan.module_ctor]
; CHECK: @llvm.global_ctors = {{.*}}{ i32 1, ptr @asan.module_ctor, ptr @asan.module_ctor }
define i32 @test_load(ptr %a) sanitize_address {
; CHECK-LABEL: @test_load
; CHECK-NOT: load
; CHECK: %[[LOAD_ADDR:[^ ]*]] = ptrtoint ptr %a to i64
; CHECK-S3: lshr i64 %[[LOAD_ADDR]], 3
; CHECK-S5: lshr i64 %[[LOAD_ADDR]], 5
; CHECK: {{or|add}}
; CHECK: %[[LOAD_SHADOW_PTR:[^ ]*]] = inttoptr
; CHECK: %[[LOAD_SHADOW:[^ ]*]] = load i8, ptr %[[LOAD_SHADOW_PTR]]
; CHECK: icmp ne i8
; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}!prof ![[PROF:[0-9]+]]
;
; First instrumentation block refines the shadow test.
; CHECK-S3: and i64 %[[LOAD_ADDR]], 7
; CHECK-S5: and i64 %[[LOAD_ADDR]], 31
; CHECK: add i64 %{{.*}}, 3
; CHECK: trunc i64 %{{.*}} to i8
; CHECK: icmp sge i8 %{{.*}}, %[[LOAD_SHADOW]]
; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
;
; The crash block reports the error.
; CHECK: call void @__asan_report_load4(i64 %[[LOAD_ADDR]])
; CHECK: unreachable
;
; The actual load.
; CHECK: %tmp1 = load i32, ptr %a
; CHECK: ret i32 %tmp1
entry:
%tmp1 = load i32, ptr %a, align 4
ret i32 %tmp1
}
define void @test_store(ptr %a) sanitize_address {
; CHECK-LABEL: @test_store
; CHECK-NOT: store
; CHECK: %[[STORE_ADDR:[^ ]*]] = ptrtoint ptr %a to i64
; CHECK-S3: lshr i64 %[[STORE_ADDR]], 3
; CHECK-S5: lshr i64 %[[STORE_ADDR]], 5
; CHECK: {{or|add}}
; CHECK: %[[STORE_SHADOW_PTR:[^ ]*]] = inttoptr
; CHECK: %[[STORE_SHADOW:[^ ]*]] = load i8, ptr %[[STORE_SHADOW_PTR]]
; CHECK: icmp ne i8
; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
;
; First instrumentation block refines the shadow test.
; CHECK-S3: and i64 %[[STORE_ADDR]], 7
; CHECK-S5: and i64 %[[STORE_ADDR]], 31
; CHECK: add i64 %{{.*}}, 3
; CHECK: trunc i64 %{{.*}} to i8
; CHECK: icmp sge i8 %{{.*}}, %[[STORE_SHADOW]]
; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
;
; The crash block reports the error.
; CHECK: call void @__asan_report_store4(i64 %[[STORE_ADDR]])
; CHECK: unreachable
;
; The actual load.
; CHECK: store i32 42, ptr %a
; CHECK: ret void
;
entry:
store i32 42, ptr %a, align 4
ret void
}
; Check that asan leaves just one alloca.
declare void @alloca_test_use(ptr)
define void @alloca_test() sanitize_address {
entry:
%x = alloca [10 x i8], align 1
%y = alloca [10 x i8], align 1
%z = alloca [10 x i8], align 1
call void @alloca_test_use(ptr %x)
call void @alloca_test_use(ptr %y)
call void @alloca_test_use(ptr %z)
ret void
}
; CHECK-LABEL: define void @alloca_test()
; CHECK: %asan_local_stack_base = alloca
; CHECK: = alloca
; CHECK-NOT: = alloca
; CHECK: ret void
define void @LongDoubleTest(ptr nocapture %a) nounwind uwtable sanitize_address {
entry:
store x86_fp80 0xK3FFF8000000000000000, ptr %a, align 16
ret void
}
; CHECK-LABEL: LongDoubleTest
; CHECK: __asan_report_store_n
; CHECK: __asan_report_store_n
; CHECK: ret void
define void @i40test(ptr %a, ptr %b) nounwind uwtable sanitize_address {
entry:
%t = load i40, ptr %a
store i40 %t, ptr %b, align 8
ret void
}
; CHECK-LABEL: i40test
; CHECK: __asan_report_load_n{{.*}}, i64 5)
; CHECK: __asan_report_load_n{{.*}}, i64 5)
; CHECK: __asan_report_store_n{{.*}}, i64 5)
; CHECK: __asan_report_store_n{{.*}}, i64 5)
; CHECK: ret void
define void @i64test_align1(ptr %b) nounwind uwtable sanitize_address {
entry:
store i64 0, ptr %b, align 1
ret void
}
; CHECK-LABEL: i64test_align1
; CHECK: __asan_report_store_n{{.*}}, i64 8)
; CHECK: __asan_report_store_n{{.*}}, i64 8)
; CHECK: ret void
define void @i128test_align8(ptr %a) nounwind uwtable sanitize_address {
entry:
store i128 0, ptr %a, align 8
ret void
}
; CHECK-LABEL: define {{[^@]+}}@i128test_align8(
; CHECK-S3: load i16, ptr %[[#]], align 1
; CHECK-S3-NEXT: icmp ne i16 %[[#]], 0
; CHECK-S5: load i8, ptr %[[#]], align 1
; CHECK-S5: load i8, ptr %[[#]], align 1
define void @i128test_align16(ptr %a) nounwind uwtable sanitize_address {
entry:
store i128 0, ptr %a, align 16
ret void
}
; CHECK-LABEL: define {{[^@]+}}@i128test_align16(
; CHECK-S3: load i16, ptr %[[#]], align 2
; CHECK-S3-NEXT: icmp ne i16 %[[#]], 0
; CHECK-S5: load i8, ptr %[[#]], align 1
; CHECK-S5-NEXT: icmp ne i8 %[[#]], 0
define void @i80test(ptr %a, ptr %b) nounwind uwtable sanitize_address {
entry:
%t = load i80, ptr %a
store i80 %t, ptr %b, align 8
ret void
}
; CHECK-LABEL: i80test
; CHECK: __asan_report_load_n{{.*}}, i64 10)
; CHECK: __asan_report_load_n{{.*}}, i64 10)
; CHECK: __asan_report_store_n{{.*}}, i64 10)
; CHECK: __asan_report_store_n{{.*}}, i64 10)
; CHECK: ret void
; asan should not instrument functions with available_externally linkage.
define available_externally i32 @f_available_externally(ptr %a) sanitize_address {
entry:
%tmp1 = load i32, ptr %a
ret i32 %tmp1
}
; CHECK-LABEL: @f_available_externally
; CHECK-NOT: __asan_report
; CHECK: ret i32
; CHECK-LABEL: @test_swifterror
; CHECK-NOT: __asan_report_load
; CHECK: ret void
define void @test_swifterror(ptr swifterror) sanitize_address {
%swifterror_ptr_value = load ptr, ptr %0
ret void
}
; CHECK-LABEL: @test_swifterror_2
; CHECK-NOT: __asan_report_store
; CHECK: ret void
define void @test_swifterror_2(ptr swifterror) sanitize_address {
store ptr null, ptr %0
ret void
}
; CHECK-LABEL: @test_swifterror_3
; CHECK-NOT: __asan_report_store
; CHECK: ret void
define void @test_swifterror_3() sanitize_address {
%swifterror_addr = alloca swifterror ptr
store ptr null, ptr %swifterror_addr
call void @test_swifterror_2(ptr swifterror %swifterror_addr)
ret void
}
;; ctor/dtor have the nounwind attribute. See uwtable.ll, they additionally have
;; the uwtable attribute with the module flag "uwtable".
; CHECK: define internal void @asan.module_ctor() #[[#ATTR:]] comdat {
; CHECK: call void @__asan_init()
;; __asan_register_elf_globals is called even if this module does not contain instrumented global variables.
; CHECK: call void @__asan_register_elf_globals(i64 ptrtoint (ptr @___asan_globals_registered to i64), i64 ptrtoint (ptr @__start_asan_globals to i64), i64 ptrtoint (ptr @__stop_asan_globals to i64))
; CHECK: attributes #[[#ATTR]] = { nounwind }
; PROF
; CHECK: ![[PROF]] = !{!"branch_weights", i32 1, i32 100000}
|
