68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
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/*
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* Copyright (C) 2020 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string>
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extern "C" int __cxa_atexit(void (*func)(void*), void* arg, void* dso);
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extern void* __dso_handle;
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static void dtor_func(void*) {}
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// Prevent the compiler from optimizing out the __cxa_atexit call.
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void (*volatile g_pdtor_func)(void*) = dtor_func;
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int main(int argc, char* argv[]) {
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auto usage = [&argv]() {
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fprintf(stderr, "usage: %s COUNT MODE\n", argv[0]);
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fprintf(stderr, "MODE is one of '_Exit' or 'exit'.\n");
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exit(1);
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};
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if (argc != 3) usage();
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int count = atoi(argv[1]);
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// Two modes: "_Exit" ==> exit early w/o calling dtors, "exit" ==> call dtors on exit.
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std::string mode = argv[2];
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if (mode != "_Exit" && mode != "exit") usage();
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for (int i = 0; i < count; ++i) {
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__cxa_atexit(g_pdtor_func, nullptr, &__dso_handle);
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}
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if (mode == "_Exit") {
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_Exit(0);
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} else {
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exit(0);
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}
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}
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