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|
; Test basic address sanitizer instrumentation.
;
; RUN: opt < %s -asan -S | FileCheck %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"
define i32 @test_load(i32* %a) address_safety {
; CHECK: @test_load
; CHECK-NOT: load
; CHECK: %[[LOAD_ADDR:[^ ]*]] = ptrtoint i32* %a to i64
; CHECK: lshr i64 %[[LOAD_ADDR]], 3
; CHECK: {{or|add}}
; CHECK: %[[LOAD_SHADOW_PTR:[^ ]*]] = inttoptr
; CHECK: %[[LOAD_SHADOW:[^ ]*]] = load i8* %[[LOAD_SHADOW_PTR]]
; CHECK: icmp ne i8
; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
;
; First instrumentation block refines the shadow test.
; CHECK: and i64 %[[LOAD_ADDR]], 7
; 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* %a
; CHECK: ret i32 %tmp1
entry:
%tmp1 = load i32* %a
ret i32 %tmp1
}
define void @test_store(i32* %a) address_safety {
; CHECK: @test_store
; CHECK-NOT: store
; CHECK: %[[STORE_ADDR:[^ ]*]] = ptrtoint i32* %a to i64
; CHECK: lshr i64 %[[STORE_ADDR]], 3
; CHECK: {{or|add}}
; CHECK: %[[STORE_SHADOW_PTR:[^ ]*]] = inttoptr
; CHECK: %[[STORE_SHADOW:[^ ]*]] = load i8* %[[STORE_SHADOW_PTR]]
; CHECK: icmp ne i8
; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
;
; First instrumentation block refines the shadow test.
; CHECK: and i64 %[[STORE_ADDR]], 7
; 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, i32* %a
; CHECK: ret void
;
entry:
store i32 42, i32* %a
ret void
}
; Check that asan leaves just one alloca.
declare void @alloca_test_use([10 x i8]*)
define void @alloca_test() address_safety {
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([10 x i8]* %x)
call void @alloca_test_use([10 x i8]* %y)
call void @alloca_test_use([10 x i8]* %z)
ret void
}
; CHECK: define void @alloca_test()
; CHECK: = alloca
; CHECK-NOT: = alloca
; CHECK: ret void
|
