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118 lines
1.9 KiB
118 lines
1.9 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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// that was supposed to be a FP due to tricky arithmetic but inferbo is too
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// smart!
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void 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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int minus(int x, int y) { return x - y; }
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void function_call_infeasible_error_path_ok(int* x) {
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free(x);
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if (minus(0, 0) < 0) {
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*x = 42;
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}
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}
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// somewhat like folly::Range<char const*>
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struct StringRange {
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char const *b_, *e_;
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StringRange() : b_(), e_(){};
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char const* data() const { return b_; }
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std::size_t size() const { return std::size_t(e_ - b_); }
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};
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void function_empty_range_ok() {
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StringRange x{};
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auto b = x.data(), past = x.data() + x.size();
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for (;; ++b) {
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if (b >= past) {
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return;
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}
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if (*b != ' ') {
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break;
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}
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}
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}
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void find_first_non_space(StringRange& x) {
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auto b = x.data(), past = x.data() + x.size();
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for (;; ++b) {
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if (b >= past) {
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return;
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}
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if (*b != ' ') {
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break;
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}
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}
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}
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void function_empty_range_interproc_ok_FP() {
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StringRange x{};
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find_first_non_space(x);
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}
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