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114 lines
2.0 KiB
114 lines
2.0 KiB
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <stdint.h>
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void cast_Good() {
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char arr[5];
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*(int32_t*)(arr + 1) = 123;
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}
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void cast_Bad_FN() {
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char arr[1];
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*(int32_t*)arr = 123;
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}
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void cast2_Good() {
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int32_t arr[4];
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*(((char*)arr) + 4) = 123;
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}
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void cast2_Bad() {
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int32_t arr[4];
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*(((char*)arr) + 20) = 123;
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}
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void cast_unsigned_to_signed_Good() {
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char arr[10];
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uint32_t x = 15;
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int32_t y = (int32_t)x;
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if (y < 10) {
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arr[y] = 0;
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}
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}
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void cast_unsigned_to_signed_Bad_FN() {
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char arr[10];
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uint32_t x = 4294967295;
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int32_t y = (int32_t)x; // y is -1.
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if (y < 10) {
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arr[y] = 0;
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}
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}
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void cast_signed_to_unsigned_Good() {
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char arr[10];
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int32_t x = 15;
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uint32_t y = (uint32_t)x;
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if (y < 10) {
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arr[y] = 0;
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}
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}
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void cast_signed_to_unsigned_Bad() {
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char arr[10];
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int32_t x = -1;
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uint32_t y = (uint32_t)x;
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if (y > 0) {
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arr[y] = 0;
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}
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}
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void cast_signed_to_unsigned2_Bad_FN() {
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char arr[10];
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int32_t x = -2;
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uint32_t y = (uint32_t)x;
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if (y > 0) {
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arr[y] = 0;
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}
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}
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void cast_float_to_int_Good() {
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char arr[10];
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float x = 15.0;
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int32_t y = (int32_t)x;
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if (y < 10) {
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arr[y] = 0;
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}
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}
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void cast_float_to_int_Bad_FN() {
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char arr[10];
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float x = 15000000000.0;
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int32_t y = (int32_t)x; // y is -2147483648.
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if (y < 10) {
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arr[y] = 0;
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}
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}
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/*
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Testing that the analyzer doesn't run infinitely on these cases
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*/
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typedef struct s_cast {
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char* data;
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struct s_cast* another;
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char* data2;
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} t_cast;
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char cast_field_to_struct(struct s_cast* s, int i0) {
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for (int i = i0; i > 0; i--) {
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s = (struct s_cast*)(&s->data);
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}
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s = s->another;
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for (int i = i0; i > 0; i--) {
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s = (struct s_cast*)(&s->data);
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s = (struct s_cast*)((unsigned char*)(void*)(s->data2) -
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offsetof(s->data2));
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}
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return *s->data;
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}
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