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79 lines
1.4 KiB
79 lines
1.4 KiB
/*
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* Copyright (c) 2016 - present
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*
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* Programming Research Laboratory (ROPAS)
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* Seoul National University, Korea
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#include <stdlib.h>
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struct S {
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int field;
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};
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void arr_access(int* arr, char* p, int i) {
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int x = arr[0];
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arr[x] = 1; /* BUG */
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*(p + i) = 'a'; /* BUG */
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}
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void function_call() {
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int arr[10];
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arr[0] = 100;
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char* p = malloc(10);
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arr_access(arr, p, 20);
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}
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void ptr_set_to_zero(int* x) {
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*x = 0;
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}
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void struct_ptr_set_to_zero(struct S* s) { s->field = 0; }
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void call_by_ptr_good() {
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int arr[10];
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int i = 99;
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ptr_set_to_zero(&i);
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arr[i] = 123;
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}
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void call_by_arr_good() {
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int arr[10];
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ptr_set_to_zero(&arr);
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arr[arr[0]] = 123;
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}
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void call_by_struct_ptr_good() {
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int arr[10];
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struct S* s = (struct S*)malloc(sizeof(struct S));
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s->field = 99;
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struct_ptr_set_to_zero(s);
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arr[s->field] = 123;
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}
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void call_by_ptr_bad() {
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int arr[10];
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int i = 5;
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ptr_set_to_zero(&i);
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arr[i - 1] = 123;
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}
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void call_by_arr_bad() {
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int arr[10];
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ptr_set_to_zero(&arr);
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arr[arr[0] - 1] = 123;
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}
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void call_by_struct_ptr_bad() {
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int arr[10];
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struct S* sp = (struct S*)malloc(sizeof(struct S));
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sp->field = 5;
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struct_ptr_set_to_zero(sp);
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arr[sp->field - 1] = 123;
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}
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