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infer_clone/infer/tests/codetoanalyze/c/bufferoverrun/array_dynlength.c

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[clang] initialize dynamically-size stack-allocated arrays Summary: Previously all knowledge of the dynamic length of such arrays was lost to infer: ``` void foo(int len) { int a[len]; } ``` The translation of this program would make no reference to `len` (except as a param of `foo`). Translate this "initialization" using the existing `__set_array_length` infer builtin, as: ``` # Declare local a[_] n$0 = len; __set_array_length(a, len); ``` update-submodule: facebook-clang-plugins Reviewed By: mbouaziz Differential Revision: D4969446 fbshipit-source-id: dff860f
8 years ago
/*
* Copyright (c) 2013 - present Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
void init_variable_array(int len) {
int x = 2 * len;
int a[len + x + 1];
a[len + x + 1] = 0;
}