1#include <stdlib.h>
 2#include <stdint.h>
 3#include "libc.h"
 4
 5static void dummy()
 6{
 7}
 8
 9/* atexit.c and __stdio_exit.c override these. the latter is linked
10 * as a consequence of linking either __toread.c or __towrite.c. */
11weak_alias(dummy, __funcs_on_exit);
12weak_alias(dummy, __stdio_exit);
13#ifdef __wasilibc_unmodified_upstream // fini
14weak_alias(dummy, _fini);
15
16extern weak hidden void (*const __fini_array_start)(void), (*const __fini_array_end)(void);
17
18static void libc_exit_fini(void)
19{
20	uintptr_t a = (uintptr_t)&__fini_array_end;
21	for (; a>(uintptr_t)&__fini_array_start; a-=sizeof(void(*)()))
22		(*(void (**)())(a-sizeof(void(*)())))();
23	_fini();
24}
25
26weak_alias(libc_exit_fini, __libc_exit_fini);
27#endif
28
29#ifdef __wasilibc_unmodified_upstream // WASI libc uses a custom exit
30_Noreturn void exit(int code)
31{
32	__funcs_on_exit();
33	__libc_exit_fini();
34	__stdio_exit();
35	_Exit(code);
36}
37#else
38// Split out the cleanup functions so that we can call them without calling
39// _Exit if we don't need to. This allows _start to just return if main
40// returns 0.
41void __wasm_call_dtors(void)
42{
43	__funcs_on_exit();
44	__stdio_exit();
45}
46
47_Noreturn void exit(int code)
48{
49	__wasm_call_dtors();
50	_Exit(code);
51}
52#endif