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https://github.com/jart/cosmopolitan.git
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56 lines
2.8 KiB
C
56 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above 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 │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/cxxabi.h"
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#include "libc/intrin/cxaatexit.h"
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#include "libc/intrin/strace.h"
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#include "libc/intrin/weaken.h"
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#include "libc/runtime/internal.h"
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/**
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* Exits process with grace.
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*
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* This calls functions registered by atexit() before terminating
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* the current process, and any associated threads. It also calls
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* all the legacy linker registered destructors in reversed order
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*
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* This implementation allows exit() to be called recursively via
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* atexit() handlers.
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*
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* @param exitcode is masked with 255
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* @see _Exit()
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* @noreturn
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*/
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wontreturn void exit(int exitcode) {
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STRACE("exit(%d)", exitcode);
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// call thread local c++ object destructors
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__cxa_thread_finalize();
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// call atexit() and __cxa_atexit() destructors
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__cxa_finalize(NULL);
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// call __destructor__ and finiarray destructors
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const uintptr_t *p;
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for (p = __fini_array_end; p > __fini_array_start;) {
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((void (*)(void))(*--p))();
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}
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// terminate process
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_Exit(exitcode);
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}
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