cosmopolitan/libc/runtime/exit.c
Justine Tunney e85aeda4ba Fix some more build issues (#43)
We're now scrubbing environment variables in compile.com since gnu make
was not behaving as expected. It also appears there was a regression in
recent revisions that caused ASAN to be turned off for most binaries in
dbg mode, which has now been fixed. Cosmopolitan is fully ASAN hardened
down to the lowest level libraries and it doesn't need any interceptors
2021-02-20 12:39:39 -08:00

46 lines
2.5 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/weaken.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/runtime.h"
extern const uintptr_t __fini_array_start[];
extern const uintptr_t __fini_array_end[];
/**
* Exits process with grace.
*
* This calls functions registered by atexit() before terminating
* the current process, and any associated threads. It also calls
* all the legacy linker registered destructors in reeverse order
*
* @param exitcode is masked with 255
* @see _Exit()
* @noreturn
*/
wontreturn void exit(int exitcode) {
const uintptr_t *p;
if (weaken(__cxa_finalize)) {
weaken(__cxa_finalize)(NULL);
}
for (p = *weaken(__fini_array_end); p > *weaken(__fini_array_start);) {
((void (*)(void))(*--p))();
}
_Exit(exitcode);
}