40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*
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* Copyright (c) 2018 Martin Storsjo
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*
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* This file is part of llvm-mingw.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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__attribute__((noinline))
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void func(char *ptr, int idx) {
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ptr[idx] = 0;
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}
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int main(int argc, char *argv[]) {
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char buf[10];
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if (argc > 1) {
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fprintf(stderr, "smashing stack\n");
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fflush(stderr);
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func(buf, 10);
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} else {
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func(buf, 9);
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fprintf(stderr, "%s: A test tool for detecting stack smashing.\n"
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"Run this with a command line argument to trigger an "
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"error.\n", argv[0]);
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}
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return 0;
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}
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