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123 lines
2.3 KiB
123 lines
2.3 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 unreachable_eq_then_ne_ok(int* x, int y) {
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if (y == 0) {
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free(x);
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}
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if (y != 0) {
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free(x);
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}
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}
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void unreachable_ne_then_eq_ok(int* x, int y) {
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if (y != 0) {
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free(x);
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}
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if (y == 0) {
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free(x);
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}
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}
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bool equal_explicit(size_t x, size_t y) {
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if (x == y) {
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return true;
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}
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return false;
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}
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// need relational domain to give this a good spec
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bool equal(size_t x, size_t y) {
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return x == y;
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}
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void FP_unreachable_interproc_compare_ok(int *x, size_t y) {
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if (equal(y, 0)) {
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free(x);
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}
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if (equal_explicit(y,1)) {
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free(x);
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}
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}
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void compare_deref_ok(int *x) {
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if (!equal((size_t) x,0)) {
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*x = 42;
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}
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}
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void arith_test_ok(int* x, int y, int z) {
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free(x);
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if (y != 0 && y != 1 && y >= 1) { // should infer y >= 2
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if (y < 2) { // always false
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*x = 42;
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}
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}
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}
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void add_test1_ok(int* x) {
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free(x);
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int y = 0;
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if (y + 1 != 1) { // always false
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*x = 42;
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}
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}
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void add_test2_ok(int* x, int y, int z) {
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free(x);
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if (y >= 0) {
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if (z >= 4 && z <= 42) {
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if (y + z < 4 || y + z <= 3 || z + 5 > 47) { // always false
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*x = 42;
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}
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}
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}
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}
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void add_test3_bad(int* x, int y, int z) {
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free(x);
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if (y > 2 && y + z > 5) { // sometimes true
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*x = 42;
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}
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}
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void add_test4_bad_FN(int* x) {
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free(x);
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// the concrete bound is never reached because it requires too many iterations
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// and we never widen
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for (int i = 0; i < 1000; i++) {
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}
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*x = 42;
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}
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void add_test5_bad(int* x, int n) {
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free(x);
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// the unknown bound is treated non-deterministically, good thing here
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for (int i = 0; i < n; i++) {
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}
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*x = 42;
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}
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void add_test6_bad(int* x, int n, int step) {
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free(x);
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// the unknown bound is treated non-deterministically, "bad thing" here as
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// loop should diverge but arguably the code is wrong and should have a more
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// explicit "false" condition (so not marking FP because we would want to
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// report here)
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for (int i = n - 1; i < n;) {
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}
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*x = 42;
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}
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void minus_test_ok(int* x) {
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free(x);
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if (-1 + 3 - 2 != 0) { // always false
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*x = 42;
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}
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}
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