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72 lines
1.1 KiB
72 lines
1.1 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 <stdlib.h>
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void error_under_true_conditionals_bad(int* x) {
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if (1) {
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free(x);
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}
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if (2 == 2) {
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*x = 42;
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}
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}
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void simple_infeasible_error_path_ok(int* x) {
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free(x);
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if (0 == 1) {
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*x = 42;
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}
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int y = 0;
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if (y == 1) {
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*x = 42;
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}
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if (y) {
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*x = 42;
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}
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if (y != 0) {
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*x = 42;
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}
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if (!(y == 0)) {
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*x = 42;
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}
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if (!(!(y != 0))) {
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*x = 42;
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}
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if (!(!(!(0 == y)))) {
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*x = 42;
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}
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}
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void free_if(int* x, int b) {
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if (b) {
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free(x);
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}
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}
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void no_free_if_ok(int* x) {
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free_if(x, 0);
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*x = 42;
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}
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void free_if_deref_bad(int* x) {
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free_if(x, 1);
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*x = 42;
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}
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// Document some limitations, although there are so many for now that
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// it's not really worth it. Add more tests when/if the analysis gets
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// smarter than just constants.
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void FP_infeasible_tricky_ok(int* x) {
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free_if(x, x == x);
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int y = 42;
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if (2 * y != y << 1) {
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free(x);
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*x = 42;
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}
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}
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