1 | // RUN: %clang_cc1 %s -emit-llvm -w -triple x86_64-apple-darwin10 -fsanitize=array-bounds -o - | FileCheck %s |
2 | |
3 | // CHECK-LABEL: define i32 @foo( |
4 | int foo(int *const p __attribute__((pass_object_size(0))), int n) { |
5 | int x = (p)[n]; |
6 | |
7 | // CHECK: [[SIZE_ALLOCA:%.*]] = alloca i64, align 8 |
8 | // CHECK: store i64 %{{.*}}, i64* [[SIZE_ALLOCA]], align 8 |
9 | // CHECK: [[LOAD_SIZE:%.*]] = load i64, i64* [[SIZE_ALLOCA]], align 8, !nosanitize |
10 | // CHECK-NEXT: [[SCALED_SIZE:%.*]] = udiv i64 [[LOAD_SIZE]], 4, !nosanitize |
11 | // CHECK-NEXT: [[SEXT_N:%.*]] = sext i32 %{{.*}} to i64, !nosanitize |
12 | // CHECK-NEXT: [[ICMP:%.*]] = icmp ult i64 [[SEXT_N]], [[SCALED_SIZE]], !nosanitize |
13 | // CHECK-NEXT: br i1 [[ICMP]], {{.*}} !nosanitize |
14 | // CHECK: __ubsan_handle_out_of_bounds |
15 | |
16 | { |
17 | int **p = &p; // Shadow the parameter. The pass_object_size info is lost. |
18 | // CHECK-NOT: __ubsan_handle_out_of_bounds |
19 | x = *p[n]; |
20 | } |
21 | |
22 | // CHECK: ret i32 |
23 | return x; |
24 | } |
25 | |
26 | typedef struct {} ZeroSizedType; |
27 | |
28 | // CHECK-LABEL: define void @bar( |
29 | ZeroSizedType bar(ZeroSizedType *const p __attribute__((pass_object_size(0))), int n) { |
30 | // CHECK-NOT: __ubsan_handle_out_of_bounds |
31 | // CHECK: ret void |
32 | return p[n]; |
33 | } |
34 | |
35 | // CHECK-LABEL: define i32 @baz( |
36 | int baz(int *const p __attribute__((pass_object_size(1))), int n) { |
37 | // CHECK: __ubsan_handle_out_of_bounds |
38 | // CHECK: ret i32 |
39 | return p[n]; |
40 | } |
41 | |
42 | // CHECK-LABEL: define i32 @mat( |
43 | int mat(int *const p __attribute__((pass_object_size(2))), int n) { |
44 | // CHECK-NOT: __ubsan_handle_out_of_bounds |
45 | // CHECK: ret i32 |
46 | return p[n]; |
47 | } |
48 | |
49 | // CHECK-LABEL: define i32 @pat( |
50 | int pat(int *const p __attribute__((pass_object_size(3))), int n) { |
51 | // CHECK-NOT: __ubsan_handle_out_of_bounds |
52 | // CHECK: ret i32 |
53 | return p[n]; |
54 | } |
55 | |
56 | // CHECK-LABEL: define i32 @cat( |
57 | int cat(int p[static 10], int n) { |
58 | // CHECK-NOT: __ubsan_handle_out_of_bounds |
59 | // CHECK: ret i32 |
60 | return p[n]; |
61 | } |
62 | |
63 | // CHECK-LABEL: define i32 @bat( |
64 | int bat(int n, int p[n]) { |
65 | // CHECK-NOT: __ubsan_handle_out_of_bounds |
66 | // CHECK: ret i32 |
67 | return p[n]; |
68 | } |
69 | |