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73 lines
1.4 KiB
73 lines
1.4 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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int use_after_free_simple_bad(int* x) {
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free(x);
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return *x;
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}
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int double_free_simple_bad(int* x) {
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free(x);
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free(x);
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}
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int* global_pointer;
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void free_global_pointer_ok() { free(global_pointer); }
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void double_free_global_bad() {
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free_global_pointer_ok();
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free_global_pointer_ok();
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}
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void free_null_then_deref_bad() {
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int* x = NULL;
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free(x);
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*x = 1;
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}
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void assumed_aliasing_latent(int* x, int* y) {
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if (x == y) {
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free(x);
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free(y);
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}
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}
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void trigger_assumed_aliasing_bad(int* x) { assumed_aliasing_latent(x, x); }
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void assumed_aliasing2_latent(int* x, int* y) {
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if (x == y)
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;
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free(x);
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free(y);
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}
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void trigger_assumed_aliasing2_bad(int* x) { assumed_aliasing2_latent(x, x); }
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void assumed_aliasing3_latent(int* x, int* y) {
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free(x);
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if (x == y)
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;
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free(y);
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}
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void trigger_assumed_aliasing3_bad(int* x) { assumed_aliasing3_latent(x, x); }
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void FN_assumed_aliasing4_latent(int* x, int* y) {
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free(x);
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free(y);
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// we create the x==y case too late: x|->- * y|->- is already in the
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// state so adding x==y creates a contradition
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if (x == y)
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;
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}
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void FN_trigger_assumed_aliasing4_bad(int* x) {
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FN_assumed_aliasing4_latent(x, x);
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}
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